| 1 | /************************************************* |
| 2 | * Exim - an Internet mail transport agent * |
| 3 | *************************************************/ |
| 4 | |
| 5 | /* Copyright (c) University of Cambridge 1995 - 2016 */ |
| 6 | /* See the file NOTICE for conditions of use and distribution. */ |
| 7 | |
| 8 | |
| 9 | /* The main function: entry point, initialization, and high-level control. |
| 10 | Also a few functions that don't naturally fit elsewhere. */ |
| 11 | |
| 12 | |
| 13 | #include "exim.h" |
| 14 | |
| 15 | #ifdef __GLIBC__ |
| 16 | # include <gnu/libc-version.h> |
| 17 | #endif |
| 18 | |
| 19 | #ifdef USE_GNUTLS |
| 20 | # include <gnutls/gnutls.h> |
| 21 | # if GNUTLS_VERSION_NUMBER < 0x030103 && !defined(DISABLE_OCSP) |
| 22 | # define DISABLE_OCSP |
| 23 | # endif |
| 24 | #endif |
| 25 | |
| 26 | extern void init_lookup_list(void); |
| 27 | |
| 28 | |
| 29 | |
| 30 | /************************************************* |
| 31 | * Function interface to store functions * |
| 32 | *************************************************/ |
| 33 | |
| 34 | /* We need some real functions to pass to the PCRE regular expression library |
| 35 | for store allocation via Exim's store manager. The normal calls are actually |
| 36 | macros that pass over location information to make tracing easier. These |
| 37 | functions just interface to the standard macro calls. A good compiler will |
| 38 | optimize out the tail recursion and so not make them too expensive. There |
| 39 | are two sets of functions; one for use when we want to retain the compiled |
| 40 | regular expression for a long time; the other for short-term use. */ |
| 41 | |
| 42 | static void * |
| 43 | function_store_get(size_t size) |
| 44 | { |
| 45 | return store_get((int)size); |
| 46 | } |
| 47 | |
| 48 | static void |
| 49 | function_dummy_free(void *block) { block = block; } |
| 50 | |
| 51 | static void * |
| 52 | function_store_malloc(size_t size) |
| 53 | { |
| 54 | return store_malloc((int)size); |
| 55 | } |
| 56 | |
| 57 | static void |
| 58 | function_store_free(void *block) |
| 59 | { |
| 60 | store_free(block); |
| 61 | } |
| 62 | |
| 63 | |
| 64 | |
| 65 | |
| 66 | /************************************************* |
| 67 | * Enums for cmdline interface * |
| 68 | *************************************************/ |
| 69 | |
| 70 | enum commandline_info { CMDINFO_NONE=0, |
| 71 | CMDINFO_HELP, CMDINFO_SIEVE, CMDINFO_DSCP }; |
| 72 | |
| 73 | |
| 74 | |
| 75 | |
| 76 | /************************************************* |
| 77 | * Compile regular expression and panic on fail * |
| 78 | *************************************************/ |
| 79 | |
| 80 | /* This function is called when failure to compile a regular expression leads |
| 81 | to a panic exit. In other cases, pcre_compile() is called directly. In many |
| 82 | cases where this function is used, the results of the compilation are to be |
| 83 | placed in long-lived store, so we temporarily reset the store management |
| 84 | functions that PCRE uses if the use_malloc flag is set. |
| 85 | |
| 86 | Argument: |
| 87 | pattern the pattern to compile |
| 88 | caseless TRUE if caseless matching is required |
| 89 | use_malloc TRUE if compile into malloc store |
| 90 | |
| 91 | Returns: pointer to the compiled pattern |
| 92 | */ |
| 93 | |
| 94 | const pcre * |
| 95 | regex_must_compile(const uschar *pattern, BOOL caseless, BOOL use_malloc) |
| 96 | { |
| 97 | int offset; |
| 98 | int options = PCRE_COPT; |
| 99 | const pcre *yield; |
| 100 | const uschar *error; |
| 101 | if (use_malloc) |
| 102 | { |
| 103 | pcre_malloc = function_store_malloc; |
| 104 | pcre_free = function_store_free; |
| 105 | } |
| 106 | if (caseless) options |= PCRE_CASELESS; |
| 107 | yield = pcre_compile(CCS pattern, options, (const char **)&error, &offset, NULL); |
| 108 | pcre_malloc = function_store_get; |
| 109 | pcre_free = function_dummy_free; |
| 110 | if (yield == NULL) |
| 111 | log_write(0, LOG_MAIN|LOG_PANIC_DIE, "regular expression error: " |
| 112 | "%s at offset %d while compiling %s", error, offset, pattern); |
| 113 | return yield; |
| 114 | } |
| 115 | |
| 116 | |
| 117 | |
| 118 | |
| 119 | /************************************************* |
| 120 | * Execute regular expression and set strings * |
| 121 | *************************************************/ |
| 122 | |
| 123 | /* This function runs a regular expression match, and sets up the pointers to |
| 124 | the matched substrings. |
| 125 | |
| 126 | Arguments: |
| 127 | re the compiled expression |
| 128 | subject the subject string |
| 129 | options additional PCRE options |
| 130 | setup if < 0 do full setup |
| 131 | if >= 0 setup from setup+1 onwards, |
| 132 | excluding the full matched string |
| 133 | |
| 134 | Returns: TRUE or FALSE |
| 135 | */ |
| 136 | |
| 137 | BOOL |
| 138 | regex_match_and_setup(const pcre *re, const uschar *subject, int options, int setup) |
| 139 | { |
| 140 | int ovector[3*(EXPAND_MAXN+1)]; |
| 141 | uschar * s = string_copy(subject); /* de-constifying */ |
| 142 | int n = pcre_exec(re, NULL, CS s, Ustrlen(s), 0, |
| 143 | PCRE_EOPT | options, ovector, sizeof(ovector)/sizeof(int)); |
| 144 | BOOL yield = n >= 0; |
| 145 | if (n == 0) n = EXPAND_MAXN + 1; |
| 146 | if (yield) |
| 147 | { |
| 148 | int nn; |
| 149 | expand_nmax = (setup < 0)? 0 : setup + 1; |
| 150 | for (nn = (setup < 0)? 0 : 2; nn < n*2; nn += 2) |
| 151 | { |
| 152 | expand_nstring[expand_nmax] = s + ovector[nn]; |
| 153 | expand_nlength[expand_nmax++] = ovector[nn+1] - ovector[nn]; |
| 154 | } |
| 155 | expand_nmax--; |
| 156 | } |
| 157 | return yield; |
| 158 | } |
| 159 | |
| 160 | |
| 161 | |
| 162 | |
| 163 | /************************************************* |
| 164 | * Set up processing details * |
| 165 | *************************************************/ |
| 166 | |
| 167 | /* Save a text string for dumping when SIGUSR1 is received. |
| 168 | Do checks for overruns. |
| 169 | |
| 170 | Arguments: format and arguments, as for printf() |
| 171 | Returns: nothing |
| 172 | */ |
| 173 | |
| 174 | void |
| 175 | set_process_info(const char *format, ...) |
| 176 | { |
| 177 | int len; |
| 178 | va_list ap; |
| 179 | sprintf(CS process_info, "%5d ", (int)getpid()); |
| 180 | len = Ustrlen(process_info); |
| 181 | va_start(ap, format); |
| 182 | if (!string_vformat(process_info + len, PROCESS_INFO_SIZE - len - 2, format, ap)) |
| 183 | Ustrcpy(process_info + len, "**** string overflowed buffer ****"); |
| 184 | len = Ustrlen(process_info); |
| 185 | process_info[len+0] = '\n'; |
| 186 | process_info[len+1] = '\0'; |
| 187 | process_info_len = len + 1; |
| 188 | DEBUG(D_process_info) debug_printf("set_process_info: %s", process_info); |
| 189 | va_end(ap); |
| 190 | } |
| 191 | |
| 192 | |
| 193 | |
| 194 | |
| 195 | /************************************************* |
| 196 | * Handler for SIGUSR1 * |
| 197 | *************************************************/ |
| 198 | |
| 199 | /* SIGUSR1 causes any exim process to write to the process log details of |
| 200 | what it is currently doing. It will only be used if the OS is capable of |
| 201 | setting up a handler that causes automatic restarting of any system call |
| 202 | that is in progress at the time. |
| 203 | |
| 204 | This function takes care to be signal-safe. |
| 205 | |
| 206 | Argument: the signal number (SIGUSR1) |
| 207 | Returns: nothing |
| 208 | */ |
| 209 | |
| 210 | static void |
| 211 | usr1_handler(int sig) |
| 212 | { |
| 213 | int fd; |
| 214 | |
| 215 | os_restarting_signal(sig, usr1_handler); |
| 216 | |
| 217 | fd = Uopen(process_log_path, O_APPEND|O_WRONLY, LOG_MODE); |
| 218 | if (fd < 0) |
| 219 | { |
| 220 | /* If we are already running as the Exim user, try to create it in the |
| 221 | current process (assuming spool_directory exists). Otherwise, if we are |
| 222 | root, do the creation in an exim:exim subprocess. */ |
| 223 | |
| 224 | int euid = geteuid(); |
| 225 | if (euid == exim_uid) |
| 226 | fd = Uopen(process_log_path, O_CREAT|O_APPEND|O_WRONLY, LOG_MODE); |
| 227 | else if (euid == root_uid) |
| 228 | fd = log_create_as_exim(process_log_path); |
| 229 | } |
| 230 | |
| 231 | /* If we are neither exim nor root, or if we failed to create the log file, |
| 232 | give up. There is not much useful we can do with errors, since we don't want |
| 233 | to disrupt whatever is going on outside the signal handler. */ |
| 234 | |
| 235 | if (fd < 0) return; |
| 236 | |
| 237 | (void)write(fd, process_info, process_info_len); |
| 238 | (void)close(fd); |
| 239 | } |
| 240 | |
| 241 | |
| 242 | |
| 243 | /************************************************* |
| 244 | * Timeout handler * |
| 245 | *************************************************/ |
| 246 | |
| 247 | /* This handler is enabled most of the time that Exim is running. The handler |
| 248 | doesn't actually get used unless alarm() has been called to set a timer, to |
| 249 | place a time limit on a system call of some kind. When the handler is run, it |
| 250 | re-enables itself. |
| 251 | |
| 252 | There are some other SIGALRM handlers that are used in special cases when more |
| 253 | than just a flag setting is required; for example, when reading a message's |
| 254 | input. These are normally set up in the code module that uses them, and the |
| 255 | SIGALRM handler is reset to this one afterwards. |
| 256 | |
| 257 | Argument: the signal value (SIGALRM) |
| 258 | Returns: nothing |
| 259 | */ |
| 260 | |
| 261 | void |
| 262 | sigalrm_handler(int sig) |
| 263 | { |
| 264 | sig = sig; /* Keep picky compilers happy */ |
| 265 | sigalrm_seen = TRUE; |
| 266 | os_non_restarting_signal(SIGALRM, sigalrm_handler); |
| 267 | } |
| 268 | |
| 269 | |
| 270 | |
| 271 | /************************************************* |
| 272 | * Sleep for a fractional time interval * |
| 273 | *************************************************/ |
| 274 | |
| 275 | /* This function is called by millisleep() and exim_wait_tick() to wait for a |
| 276 | period of time that may include a fraction of a second. The coding is somewhat |
| 277 | tedious. We do not expect setitimer() ever to fail, but if it does, the process |
| 278 | will wait for ever, so we panic in this instance. (There was a case of this |
| 279 | when a bug in a function that calls milliwait() caused it to pass invalid data. |
| 280 | That's when I added the check. :-) |
| 281 | |
| 282 | We assume it to be not worth sleeping for under 100us; this value will |
| 283 | require revisiting as hardware advances. This avoids the issue of |
| 284 | a zero-valued timer setting meaning "never fire". |
| 285 | |
| 286 | Argument: an itimerval structure containing the interval |
| 287 | Returns: nothing |
| 288 | */ |
| 289 | |
| 290 | static void |
| 291 | milliwait(struct itimerval *itval) |
| 292 | { |
| 293 | sigset_t sigmask; |
| 294 | sigset_t old_sigmask; |
| 295 | |
| 296 | if (itval->it_value.tv_usec < 100 && itval->it_value.tv_sec == 0) |
| 297 | return; |
| 298 | (void)sigemptyset(&sigmask); /* Empty mask */ |
| 299 | (void)sigaddset(&sigmask, SIGALRM); /* Add SIGALRM */ |
| 300 | (void)sigprocmask(SIG_BLOCK, &sigmask, &old_sigmask); /* Block SIGALRM */ |
| 301 | if (setitimer(ITIMER_REAL, itval, NULL) < 0) /* Start timer */ |
| 302 | log_write(0, LOG_MAIN|LOG_PANIC_DIE, |
| 303 | "setitimer() failed: %s", strerror(errno)); |
| 304 | (void)sigfillset(&sigmask); /* All signals */ |
| 305 | (void)sigdelset(&sigmask, SIGALRM); /* Remove SIGALRM */ |
| 306 | (void)sigsuspend(&sigmask); /* Until SIGALRM */ |
| 307 | (void)sigprocmask(SIG_SETMASK, &old_sigmask, NULL); /* Restore mask */ |
| 308 | } |
| 309 | |
| 310 | |
| 311 | |
| 312 | |
| 313 | /************************************************* |
| 314 | * Millisecond sleep function * |
| 315 | *************************************************/ |
| 316 | |
| 317 | /* The basic sleep() function has a granularity of 1 second, which is too rough |
| 318 | in some cases - for example, when using an increasing delay to slow down |
| 319 | spammers. |
| 320 | |
| 321 | Argument: number of millseconds |
| 322 | Returns: nothing |
| 323 | */ |
| 324 | |
| 325 | void |
| 326 | millisleep(int msec) |
| 327 | { |
| 328 | struct itimerval itval; |
| 329 | itval.it_interval.tv_sec = 0; |
| 330 | itval.it_interval.tv_usec = 0; |
| 331 | itval.it_value.tv_sec = msec/1000; |
| 332 | itval.it_value.tv_usec = (msec % 1000) * 1000; |
| 333 | milliwait(&itval); |
| 334 | } |
| 335 | |
| 336 | |
| 337 | |
| 338 | /************************************************* |
| 339 | * Compare microsecond times * |
| 340 | *************************************************/ |
| 341 | |
| 342 | /* |
| 343 | Arguments: |
| 344 | tv1 the first time |
| 345 | tv2 the second time |
| 346 | |
| 347 | Returns: -1, 0, or +1 |
| 348 | */ |
| 349 | |
| 350 | int |
| 351 | exim_tvcmp(struct timeval *t1, struct timeval *t2) |
| 352 | { |
| 353 | if (t1->tv_sec > t2->tv_sec) return +1; |
| 354 | if (t1->tv_sec < t2->tv_sec) return -1; |
| 355 | if (t1->tv_usec > t2->tv_usec) return +1; |
| 356 | if (t1->tv_usec < t2->tv_usec) return -1; |
| 357 | return 0; |
| 358 | } |
| 359 | |
| 360 | |
| 361 | |
| 362 | |
| 363 | /************************************************* |
| 364 | * Clock tick wait function * |
| 365 | *************************************************/ |
| 366 | |
| 367 | /* Exim uses a time + a pid to generate a unique identifier in two places: its |
| 368 | message IDs, and in file names for maildir deliveries. Because some OS now |
| 369 | re-use pids within the same second, sub-second times are now being used. |
| 370 | However, for absolute certaintly, we must ensure the clock has ticked before |
| 371 | allowing the relevant process to complete. At the time of implementation of |
| 372 | this code (February 2003), the speed of processors is such that the clock will |
| 373 | invariably have ticked already by the time a process has done its job. This |
| 374 | function prepares for the time when things are faster - and it also copes with |
| 375 | clocks that go backwards. |
| 376 | |
| 377 | Arguments: |
| 378 | then_tv A timeval which was used to create uniqueness; its usec field |
| 379 | has been rounded down to the value of the resolution. |
| 380 | We want to be sure the current time is greater than this. |
| 381 | resolution The resolution that was used to divide the microseconds |
| 382 | (1 for maildir, larger for message ids) |
| 383 | |
| 384 | Returns: nothing |
| 385 | */ |
| 386 | |
| 387 | void |
| 388 | exim_wait_tick(struct timeval *then_tv, int resolution) |
| 389 | { |
| 390 | struct timeval now_tv; |
| 391 | long int now_true_usec; |
| 392 | |
| 393 | (void)gettimeofday(&now_tv, NULL); |
| 394 | now_true_usec = now_tv.tv_usec; |
| 395 | now_tv.tv_usec = (now_true_usec/resolution) * resolution; |
| 396 | |
| 397 | if (exim_tvcmp(&now_tv, then_tv) <= 0) |
| 398 | { |
| 399 | struct itimerval itval; |
| 400 | itval.it_interval.tv_sec = 0; |
| 401 | itval.it_interval.tv_usec = 0; |
| 402 | itval.it_value.tv_sec = then_tv->tv_sec - now_tv.tv_sec; |
| 403 | itval.it_value.tv_usec = then_tv->tv_usec + resolution - now_true_usec; |
| 404 | |
| 405 | /* We know that, overall, "now" is less than or equal to "then". Therefore, a |
| 406 | negative value for the microseconds is possible only in the case when "now" |
| 407 | is more than a second less than "then". That means that itval.it_value.tv_sec |
| 408 | is greater than zero. The following correction is therefore safe. */ |
| 409 | |
| 410 | if (itval.it_value.tv_usec < 0) |
| 411 | { |
| 412 | itval.it_value.tv_usec += 1000000; |
| 413 | itval.it_value.tv_sec -= 1; |
| 414 | } |
| 415 | |
| 416 | DEBUG(D_transport|D_receive) |
| 417 | { |
| 418 | if (!running_in_test_harness) |
| 419 | { |
| 420 | debug_printf("tick check: " TIME_T_FMT ".%06lu " TIME_T_FMT ".%06lu\n", |
| 421 | then_tv->tv_sec, (long) then_tv->tv_usec, |
| 422 | now_tv.tv_sec, (long) now_tv.tv_usec); |
| 423 | debug_printf("waiting " TIME_T_FMT ".%06lu\n", |
| 424 | itval.it_value.tv_sec, (long) itval.it_value.tv_usec); |
| 425 | } |
| 426 | } |
| 427 | |
| 428 | milliwait(&itval); |
| 429 | } |
| 430 | } |
| 431 | |
| 432 | |
| 433 | |
| 434 | |
| 435 | /************************************************* |
| 436 | * Call fopen() with umask 777 and adjust mode * |
| 437 | *************************************************/ |
| 438 | |
| 439 | /* Exim runs with umask(0) so that files created with open() have the mode that |
| 440 | is specified in the open() call. However, there are some files, typically in |
| 441 | the spool directory, that are created with fopen(). They end up world-writeable |
| 442 | if no precautions are taken. Although the spool directory is not accessible to |
| 443 | the world, this is an untidiness. So this is a wrapper function for fopen() |
| 444 | that sorts out the mode of the created file. |
| 445 | |
| 446 | Arguments: |
| 447 | filename the file name |
| 448 | options the fopen() options |
| 449 | mode the required mode |
| 450 | |
| 451 | Returns: the fopened FILE or NULL |
| 452 | */ |
| 453 | |
| 454 | FILE * |
| 455 | modefopen(const uschar *filename, const char *options, mode_t mode) |
| 456 | { |
| 457 | mode_t saved_umask = umask(0777); |
| 458 | FILE *f = Ufopen(filename, options); |
| 459 | (void)umask(saved_umask); |
| 460 | if (f != NULL) (void)fchmod(fileno(f), mode); |
| 461 | return f; |
| 462 | } |
| 463 | |
| 464 | |
| 465 | |
| 466 | |
| 467 | /************************************************* |
| 468 | * Ensure stdin, stdout, and stderr exist * |
| 469 | *************************************************/ |
| 470 | |
| 471 | /* Some operating systems grumble if an exec() happens without a standard |
| 472 | input, output, and error (fds 0, 1, 2) being defined. The worry is that some |
| 473 | file will be opened and will use these fd values, and then some other bit of |
| 474 | code will assume, for example, that it can write error messages to stderr. |
| 475 | This function ensures that fds 0, 1, and 2 are open if they do not already |
| 476 | exist, by connecting them to /dev/null. |
| 477 | |
| 478 | This function is also used to ensure that std{in,out,err} exist at all times, |
| 479 | so that if any library that Exim calls tries to use them, it doesn't crash. |
| 480 | |
| 481 | Arguments: None |
| 482 | Returns: Nothing |
| 483 | */ |
| 484 | |
| 485 | void |
| 486 | exim_nullstd(void) |
| 487 | { |
| 488 | int i; |
| 489 | int devnull = -1; |
| 490 | struct stat statbuf; |
| 491 | for (i = 0; i <= 2; i++) |
| 492 | { |
| 493 | if (fstat(i, &statbuf) < 0 && errno == EBADF) |
| 494 | { |
| 495 | if (devnull < 0) devnull = open("/dev/null", O_RDWR); |
| 496 | if (devnull < 0) log_write(0, LOG_MAIN|LOG_PANIC_DIE, "%s", |
| 497 | string_open_failed(errno, "/dev/null")); |
| 498 | if (devnull != i) (void)dup2(devnull, i); |
| 499 | } |
| 500 | } |
| 501 | if (devnull > 2) (void)close(devnull); |
| 502 | } |
| 503 | |
| 504 | |
| 505 | |
| 506 | |
| 507 | /************************************************* |
| 508 | * Close unwanted file descriptors for delivery * |
| 509 | *************************************************/ |
| 510 | |
| 511 | /* This function is called from a new process that has been forked to deliver |
| 512 | an incoming message, either directly, or using exec. |
| 513 | |
| 514 | We want any smtp input streams to be closed in this new process. However, it |
| 515 | has been observed that using fclose() here causes trouble. When reading in -bS |
| 516 | input, duplicate copies of messages have been seen. The files will be sharing a |
| 517 | file pointer with the parent process, and it seems that fclose() (at least on |
| 518 | some systems - I saw this on Solaris 2.5.1) messes with that file pointer, at |
| 519 | least sometimes. Hence we go for closing the underlying file descriptors. |
| 520 | |
| 521 | If TLS is active, we want to shut down the TLS library, but without molesting |
| 522 | the parent's SSL connection. |
| 523 | |
| 524 | For delivery of a non-SMTP message, we want to close stdin and stdout (and |
| 525 | stderr unless debugging) because the calling process might have set them up as |
| 526 | pipes and be waiting for them to close before it waits for the submission |
| 527 | process to terminate. If they aren't closed, they hold up the calling process |
| 528 | until the initial delivery process finishes, which is not what we want. |
| 529 | |
| 530 | Exception: We do want it for synchronous delivery! |
| 531 | |
| 532 | And notwithstanding all the above, if D_resolver is set, implying resolver |
| 533 | debugging, leave stdout open, because that's where the resolver writes its |
| 534 | debugging output. |
| 535 | |
| 536 | When we close stderr (which implies we've also closed stdout), we also get rid |
| 537 | of any controlling terminal. |
| 538 | |
| 539 | Arguments: None |
| 540 | Returns: Nothing |
| 541 | */ |
| 542 | |
| 543 | static void |
| 544 | close_unwanted(void) |
| 545 | { |
| 546 | if (smtp_input) |
| 547 | { |
| 548 | #ifdef SUPPORT_TLS |
| 549 | tls_close(TRUE, FALSE); /* Shut down the TLS library */ |
| 550 | #endif |
| 551 | (void)close(fileno(smtp_in)); |
| 552 | (void)close(fileno(smtp_out)); |
| 553 | smtp_in = NULL; |
| 554 | } |
| 555 | else |
| 556 | { |
| 557 | (void)close(0); /* stdin */ |
| 558 | if ((debug_selector & D_resolver) == 0) (void)close(1); /* stdout */ |
| 559 | if (debug_selector == 0) /* stderr */ |
| 560 | { |
| 561 | if (!synchronous_delivery) |
| 562 | { |
| 563 | (void)close(2); |
| 564 | log_stderr = NULL; |
| 565 | } |
| 566 | (void)setsid(); |
| 567 | } |
| 568 | } |
| 569 | } |
| 570 | |
| 571 | |
| 572 | |
| 573 | |
| 574 | /************************************************* |
| 575 | * Set uid and gid * |
| 576 | *************************************************/ |
| 577 | |
| 578 | /* This function sets a new uid and gid permanently, optionally calling |
| 579 | initgroups() to set auxiliary groups. There are some special cases when running |
| 580 | Exim in unprivileged modes. In these situations the effective uid will not be |
| 581 | root; if we already have the right effective uid/gid, and don't need to |
| 582 | initialize any groups, leave things as they are. |
| 583 | |
| 584 | Arguments: |
| 585 | uid the uid |
| 586 | gid the gid |
| 587 | igflag TRUE if initgroups() wanted |
| 588 | msg text to use in debugging output and failure log |
| 589 | |
| 590 | Returns: nothing; bombs out on failure |
| 591 | */ |
| 592 | |
| 593 | void |
| 594 | exim_setugid(uid_t uid, gid_t gid, BOOL igflag, uschar *msg) |
| 595 | { |
| 596 | uid_t euid = geteuid(); |
| 597 | gid_t egid = getegid(); |
| 598 | |
| 599 | if (euid == root_uid || euid != uid || egid != gid || igflag) |
| 600 | { |
| 601 | /* At least one OS returns +1 for initgroups failure, so just check for |
| 602 | non-zero. */ |
| 603 | |
| 604 | if (igflag) |
| 605 | { |
| 606 | struct passwd *pw = getpwuid(uid); |
| 607 | if (pw != NULL) |
| 608 | { |
| 609 | if (initgroups(pw->pw_name, gid) != 0) |
| 610 | log_write(0,LOG_MAIN|LOG_PANIC_DIE,"initgroups failed for uid=%ld: %s", |
| 611 | (long int)uid, strerror(errno)); |
| 612 | } |
| 613 | else log_write(0, LOG_MAIN|LOG_PANIC_DIE, "cannot run initgroups(): " |
| 614 | "no passwd entry for uid=%ld", (long int)uid); |
| 615 | } |
| 616 | |
| 617 | if (setgid(gid) < 0 || setuid(uid) < 0) |
| 618 | { |
| 619 | log_write(0, LOG_MAIN|LOG_PANIC_DIE, "unable to set gid=%ld or uid=%ld " |
| 620 | "(euid=%ld): %s", (long int)gid, (long int)uid, (long int)euid, msg); |
| 621 | } |
| 622 | } |
| 623 | |
| 624 | /* Debugging output included uid/gid and all groups */ |
| 625 | |
| 626 | DEBUG(D_uid) |
| 627 | { |
| 628 | int group_count, save_errno; |
| 629 | gid_t group_list[NGROUPS_MAX]; |
| 630 | debug_printf("changed uid/gid: %s\n uid=%ld gid=%ld pid=%ld\n", msg, |
| 631 | (long int)geteuid(), (long int)getegid(), (long int)getpid()); |
| 632 | group_count = getgroups(NGROUPS_MAX, group_list); |
| 633 | save_errno = errno; |
| 634 | debug_printf(" auxiliary group list:"); |
| 635 | if (group_count > 0) |
| 636 | { |
| 637 | int i; |
| 638 | for (i = 0; i < group_count; i++) debug_printf(" %d", (int)group_list[i]); |
| 639 | } |
| 640 | else if (group_count < 0) |
| 641 | debug_printf(" <error: %s>", strerror(save_errno)); |
| 642 | else debug_printf(" <none>"); |
| 643 | debug_printf("\n"); |
| 644 | } |
| 645 | } |
| 646 | |
| 647 | |
| 648 | |
| 649 | |
| 650 | /************************************************* |
| 651 | * Exit point * |
| 652 | *************************************************/ |
| 653 | |
| 654 | /* Exim exits via this function so that it always clears up any open |
| 655 | databases. |
| 656 | |
| 657 | Arguments: |
| 658 | rc return code |
| 659 | |
| 660 | Returns: does not return |
| 661 | */ |
| 662 | |
| 663 | void |
| 664 | exim_exit(int rc) |
| 665 | { |
| 666 | search_tidyup(); |
| 667 | DEBUG(D_any) |
| 668 | debug_printf(">>>>>>>>>>>>>>>> Exim pid=%d terminating with rc=%d " |
| 669 | ">>>>>>>>>>>>>>>>\n", (int)getpid(), rc); |
| 670 | exit(rc); |
| 671 | } |
| 672 | |
| 673 | |
| 674 | |
| 675 | |
| 676 | /************************************************* |
| 677 | * Extract port from host address * |
| 678 | *************************************************/ |
| 679 | |
| 680 | /* Called to extract the port from the values given to -oMa and -oMi. |
| 681 | It also checks the syntax of the address, and terminates it before the |
| 682 | port data when a port is extracted. |
| 683 | |
| 684 | Argument: |
| 685 | address the address, with possible port on the end |
| 686 | |
| 687 | Returns: the port, or zero if there isn't one |
| 688 | bombs out on a syntax error |
| 689 | */ |
| 690 | |
| 691 | static int |
| 692 | check_port(uschar *address) |
| 693 | { |
| 694 | int port = host_address_extract_port(address); |
| 695 | if (string_is_ip_address(address, NULL) == 0) |
| 696 | { |
| 697 | fprintf(stderr, "exim abandoned: \"%s\" is not an IP address\n", address); |
| 698 | exit(EXIT_FAILURE); |
| 699 | } |
| 700 | return port; |
| 701 | } |
| 702 | |
| 703 | |
| 704 | |
| 705 | /************************************************* |
| 706 | * Test/verify an address * |
| 707 | *************************************************/ |
| 708 | |
| 709 | /* This function is called by the -bv and -bt code. It extracts a working |
| 710 | address from a full RFC 822 address. This isn't really necessary per se, but it |
| 711 | has the effect of collapsing source routes. |
| 712 | |
| 713 | Arguments: |
| 714 | s the address string |
| 715 | flags flag bits for verify_address() |
| 716 | exit_value to be set for failures |
| 717 | |
| 718 | Returns: nothing |
| 719 | */ |
| 720 | |
| 721 | static void |
| 722 | test_address(uschar *s, int flags, int *exit_value) |
| 723 | { |
| 724 | int start, end, domain; |
| 725 | uschar *parse_error = NULL; |
| 726 | uschar *address = parse_extract_address(s, &parse_error, &start, &end, &domain, |
| 727 | FALSE); |
| 728 | if (address == NULL) |
| 729 | { |
| 730 | fprintf(stdout, "syntax error: %s\n", parse_error); |
| 731 | *exit_value = 2; |
| 732 | } |
| 733 | else |
| 734 | { |
| 735 | int rc = verify_address(deliver_make_addr(address,TRUE), stdout, flags, -1, |
| 736 | -1, -1, NULL, NULL, NULL); |
| 737 | if (rc == FAIL) *exit_value = 2; |
| 738 | else if (rc == DEFER && *exit_value == 0) *exit_value = 1; |
| 739 | } |
| 740 | } |
| 741 | |
| 742 | |
| 743 | |
| 744 | /************************************************* |
| 745 | * Show supported features * |
| 746 | *************************************************/ |
| 747 | |
| 748 | /* This function is called for -bV/--version and for -d to output the optional |
| 749 | features of the current Exim binary. |
| 750 | |
| 751 | Arguments: a FILE for printing |
| 752 | Returns: nothing |
| 753 | */ |
| 754 | |
| 755 | static void |
| 756 | show_whats_supported(FILE *f) |
| 757 | { |
| 758 | auth_info *authi; |
| 759 | |
| 760 | #ifdef DB_VERSION_STRING |
| 761 | fprintf(f, "Berkeley DB: %s\n", DB_VERSION_STRING); |
| 762 | #elif defined(BTREEVERSION) && defined(HASHVERSION) |
| 763 | #ifdef USE_DB |
| 764 | fprintf(f, "Probably Berkeley DB version 1.8x (native mode)\n"); |
| 765 | #else |
| 766 | fprintf(f, "Probably Berkeley DB version 1.8x (compatibility mode)\n"); |
| 767 | #endif |
| 768 | #elif defined(_DBM_RDONLY) || defined(dbm_dirfno) |
| 769 | fprintf(f, "Probably ndbm\n"); |
| 770 | #elif defined(USE_TDB) |
| 771 | fprintf(f, "Using tdb\n"); |
| 772 | #else |
| 773 | #ifdef USE_GDBM |
| 774 | fprintf(f, "Probably GDBM (native mode)\n"); |
| 775 | #else |
| 776 | fprintf(f, "Probably GDBM (compatibility mode)\n"); |
| 777 | #endif |
| 778 | #endif |
| 779 | |
| 780 | fprintf(f, "Support for:"); |
| 781 | #ifdef SUPPORT_CRYPTEQ |
| 782 | fprintf(f, " crypteq"); |
| 783 | #endif |
| 784 | #if HAVE_ICONV |
| 785 | fprintf(f, " iconv()"); |
| 786 | #endif |
| 787 | #if HAVE_IPV6 |
| 788 | fprintf(f, " IPv6"); |
| 789 | #endif |
| 790 | #ifdef HAVE_SETCLASSRESOURCES |
| 791 | fprintf(f, " use_setclassresources"); |
| 792 | #endif |
| 793 | #ifdef SUPPORT_PAM |
| 794 | fprintf(f, " PAM"); |
| 795 | #endif |
| 796 | #ifdef EXIM_PERL |
| 797 | fprintf(f, " Perl"); |
| 798 | #endif |
| 799 | #ifdef EXPAND_DLFUNC |
| 800 | fprintf(f, " Expand_dlfunc"); |
| 801 | #endif |
| 802 | #ifdef USE_TCP_WRAPPERS |
| 803 | fprintf(f, " TCPwrappers"); |
| 804 | #endif |
| 805 | #ifdef SUPPORT_TLS |
| 806 | #ifdef USE_GNUTLS |
| 807 | fprintf(f, " GnuTLS"); |
| 808 | #else |
| 809 | fprintf(f, " OpenSSL"); |
| 810 | #endif |
| 811 | #endif |
| 812 | #ifdef SUPPORT_TRANSLATE_IP_ADDRESS |
| 813 | fprintf(f, " translate_ip_address"); |
| 814 | #endif |
| 815 | #ifdef SUPPORT_MOVE_FROZEN_MESSAGES |
| 816 | fprintf(f, " move_frozen_messages"); |
| 817 | #endif |
| 818 | #ifdef WITH_CONTENT_SCAN |
| 819 | fprintf(f, " Content_Scanning"); |
| 820 | #endif |
| 821 | #ifndef DISABLE_DKIM |
| 822 | fprintf(f, " DKIM"); |
| 823 | #endif |
| 824 | #ifndef DISABLE_DNSSEC |
| 825 | fprintf(f, " DNSSEC"); |
| 826 | #endif |
| 827 | #ifndef DISABLE_EVENT |
| 828 | fprintf(f, " Event"); |
| 829 | #endif |
| 830 | #ifdef SUPPORT_I18N |
| 831 | fprintf(f, " I18N"); |
| 832 | #endif |
| 833 | #ifndef DISABLE_OCSP |
| 834 | fprintf(f, " OCSP"); |
| 835 | #endif |
| 836 | #ifndef DISABLE_PRDR |
| 837 | fprintf(f, " PRDR"); |
| 838 | #endif |
| 839 | #ifdef SUPPORT_PROXY |
| 840 | fprintf(f, " PROXY"); |
| 841 | #endif |
| 842 | #ifdef SUPPORT_SOCKS |
| 843 | fprintf(f, " SOCKS"); |
| 844 | #endif |
| 845 | #ifdef EXPERIMENTAL_SPF |
| 846 | fprintf(f, " Experimental_SPF"); |
| 847 | #endif |
| 848 | #ifdef EXPERIMENTAL_SRS |
| 849 | fprintf(f, " Experimental_SRS"); |
| 850 | #endif |
| 851 | #ifdef EXPERIMENTAL_BRIGHTMAIL |
| 852 | fprintf(f, " Experimental_Brightmail"); |
| 853 | #endif |
| 854 | #ifdef EXPERIMENTAL_DANE |
| 855 | fprintf(f, " Experimental_DANE"); |
| 856 | #endif |
| 857 | #ifdef EXPERIMENTAL_DCC |
| 858 | fprintf(f, " Experimental_DCC"); |
| 859 | #endif |
| 860 | #ifdef EXPERIMENTAL_DMARC |
| 861 | fprintf(f, " Experimental_DMARC"); |
| 862 | #endif |
| 863 | #ifdef EXPERIMENTAL_DSN_INFO |
| 864 | fprintf(f, " Experimental_DSN_info"); |
| 865 | #endif |
| 866 | fprintf(f, "\n"); |
| 867 | |
| 868 | fprintf(f, "Lookups (built-in):"); |
| 869 | #if defined(LOOKUP_LSEARCH) && LOOKUP_LSEARCH!=2 |
| 870 | fprintf(f, " lsearch wildlsearch nwildlsearch iplsearch"); |
| 871 | #endif |
| 872 | #if defined(LOOKUP_CDB) && LOOKUP_CDB!=2 |
| 873 | fprintf(f, " cdb"); |
| 874 | #endif |
| 875 | #if defined(LOOKUP_DBM) && LOOKUP_DBM!=2 |
| 876 | fprintf(f, " dbm dbmjz dbmnz"); |
| 877 | #endif |
| 878 | #if defined(LOOKUP_DNSDB) && LOOKUP_DNSDB!=2 |
| 879 | fprintf(f, " dnsdb"); |
| 880 | #endif |
| 881 | #if defined(LOOKUP_DSEARCH) && LOOKUP_DSEARCH!=2 |
| 882 | fprintf(f, " dsearch"); |
| 883 | #endif |
| 884 | #if defined(LOOKUP_IBASE) && LOOKUP_IBASE!=2 |
| 885 | fprintf(f, " ibase"); |
| 886 | #endif |
| 887 | #if defined(LOOKUP_LDAP) && LOOKUP_LDAP!=2 |
| 888 | fprintf(f, " ldap ldapdn ldapm"); |
| 889 | #endif |
| 890 | #if defined(LOOKUP_MYSQL) && LOOKUP_MYSQL!=2 |
| 891 | fprintf(f, " mysql"); |
| 892 | #endif |
| 893 | #if defined(LOOKUP_NIS) && LOOKUP_NIS!=2 |
| 894 | fprintf(f, " nis nis0"); |
| 895 | #endif |
| 896 | #if defined(LOOKUP_NISPLUS) && LOOKUP_NISPLUS!=2 |
| 897 | fprintf(f, " nisplus"); |
| 898 | #endif |
| 899 | #if defined(LOOKUP_ORACLE) && LOOKUP_ORACLE!=2 |
| 900 | fprintf(f, " oracle"); |
| 901 | #endif |
| 902 | #if defined(LOOKUP_PASSWD) && LOOKUP_PASSWD!=2 |
| 903 | fprintf(f, " passwd"); |
| 904 | #endif |
| 905 | #if defined(LOOKUP_PGSQL) && LOOKUP_PGSQL!=2 |
| 906 | fprintf(f, " pgsql"); |
| 907 | #endif |
| 908 | #if defined(LOOKUP_REDIS) && LOOKUP_REDIS!=2 |
| 909 | fprintf(f, " redis"); |
| 910 | #endif |
| 911 | #if defined(LOOKUP_SQLITE) && LOOKUP_SQLITE!=2 |
| 912 | fprintf(f, " sqlite"); |
| 913 | #endif |
| 914 | #if defined(LOOKUP_TESTDB) && LOOKUP_TESTDB!=2 |
| 915 | fprintf(f, " testdb"); |
| 916 | #endif |
| 917 | #if defined(LOOKUP_WHOSON) && LOOKUP_WHOSON!=2 |
| 918 | fprintf(f, " whoson"); |
| 919 | #endif |
| 920 | fprintf(f, "\n"); |
| 921 | |
| 922 | fprintf(f, "Authenticators:"); |
| 923 | #ifdef AUTH_CRAM_MD5 |
| 924 | fprintf(f, " cram_md5"); |
| 925 | #endif |
| 926 | #ifdef AUTH_CYRUS_SASL |
| 927 | fprintf(f, " cyrus_sasl"); |
| 928 | #endif |
| 929 | #ifdef AUTH_DOVECOT |
| 930 | fprintf(f, " dovecot"); |
| 931 | #endif |
| 932 | #ifdef AUTH_GSASL |
| 933 | fprintf(f, " gsasl"); |
| 934 | #endif |
| 935 | #ifdef AUTH_HEIMDAL_GSSAPI |
| 936 | fprintf(f, " heimdal_gssapi"); |
| 937 | #endif |
| 938 | #ifdef AUTH_PLAINTEXT |
| 939 | fprintf(f, " plaintext"); |
| 940 | #endif |
| 941 | #ifdef AUTH_SPA |
| 942 | fprintf(f, " spa"); |
| 943 | #endif |
| 944 | #ifdef AUTH_TLS |
| 945 | fprintf(f, " tls"); |
| 946 | #endif |
| 947 | fprintf(f, "\n"); |
| 948 | |
| 949 | fprintf(f, "Routers:"); |
| 950 | #ifdef ROUTER_ACCEPT |
| 951 | fprintf(f, " accept"); |
| 952 | #endif |
| 953 | #ifdef ROUTER_DNSLOOKUP |
| 954 | fprintf(f, " dnslookup"); |
| 955 | #endif |
| 956 | #ifdef ROUTER_IPLITERAL |
| 957 | fprintf(f, " ipliteral"); |
| 958 | #endif |
| 959 | #ifdef ROUTER_IPLOOKUP |
| 960 | fprintf(f, " iplookup"); |
| 961 | #endif |
| 962 | #ifdef ROUTER_MANUALROUTE |
| 963 | fprintf(f, " manualroute"); |
| 964 | #endif |
| 965 | #ifdef ROUTER_QUERYPROGRAM |
| 966 | fprintf(f, " queryprogram"); |
| 967 | #endif |
| 968 | #ifdef ROUTER_REDIRECT |
| 969 | fprintf(f, " redirect"); |
| 970 | #endif |
| 971 | fprintf(f, "\n"); |
| 972 | |
| 973 | fprintf(f, "Transports:"); |
| 974 | #ifdef TRANSPORT_APPENDFILE |
| 975 | fprintf(f, " appendfile"); |
| 976 | #ifdef SUPPORT_MAILDIR |
| 977 | fprintf(f, "/maildir"); |
| 978 | #endif |
| 979 | #ifdef SUPPORT_MAILSTORE |
| 980 | fprintf(f, "/mailstore"); |
| 981 | #endif |
| 982 | #ifdef SUPPORT_MBX |
| 983 | fprintf(f, "/mbx"); |
| 984 | #endif |
| 985 | #endif |
| 986 | #ifdef TRANSPORT_AUTOREPLY |
| 987 | fprintf(f, " autoreply"); |
| 988 | #endif |
| 989 | #ifdef TRANSPORT_LMTP |
| 990 | fprintf(f, " lmtp"); |
| 991 | #endif |
| 992 | #ifdef TRANSPORT_PIPE |
| 993 | fprintf(f, " pipe"); |
| 994 | #endif |
| 995 | #ifdef TRANSPORT_SMTP |
| 996 | fprintf(f, " smtp"); |
| 997 | #endif |
| 998 | fprintf(f, "\n"); |
| 999 | |
| 1000 | if (fixed_never_users[0] > 0) |
| 1001 | { |
| 1002 | int i; |
| 1003 | fprintf(f, "Fixed never_users: "); |
| 1004 | for (i = 1; i <= (int)fixed_never_users[0] - 1; i++) |
| 1005 | fprintf(f, "%d:", (unsigned int)fixed_never_users[i]); |
| 1006 | fprintf(f, "%d\n", (unsigned int)fixed_never_users[i]); |
| 1007 | } |
| 1008 | |
| 1009 | fprintf(f, "Size of off_t: " SIZE_T_FMT "\n", sizeof(off_t)); |
| 1010 | |
| 1011 | /* Everything else is details which are only worth reporting when debugging. |
| 1012 | Perhaps the tls_version_report should move into this too. */ |
| 1013 | DEBUG(D_any) do { |
| 1014 | |
| 1015 | int i; |
| 1016 | |
| 1017 | /* clang defines __GNUC__ (at least, for me) so test for it first */ |
| 1018 | #if defined(__clang__) |
| 1019 | fprintf(f, "Compiler: CLang [%s]\n", __clang_version__); |
| 1020 | #elif defined(__GNUC__) |
| 1021 | fprintf(f, "Compiler: GCC [%s]\n", |
| 1022 | # ifdef __VERSION__ |
| 1023 | __VERSION__ |
| 1024 | # else |
| 1025 | "? unknown version ?" |
| 1026 | # endif |
| 1027 | ); |
| 1028 | #else |
| 1029 | fprintf(f, "Compiler: <unknown>\n"); |
| 1030 | #endif |
| 1031 | |
| 1032 | #ifdef __GLIBC__ |
| 1033 | fprintf(f, "Library version: Glibc: Compile: %d.%d\n", |
| 1034 | __GLIBC__, __GLIBC_MINOR__); |
| 1035 | if (__GLIBC_PREREQ(2, 1)) |
| 1036 | fprintf(f, " Runtime: %s\n", |
| 1037 | gnu_get_libc_version()); |
| 1038 | #endif |
| 1039 | |
| 1040 | #ifdef SUPPORT_TLS |
| 1041 | tls_version_report(f); |
| 1042 | #endif |
| 1043 | #ifdef SUPPORT_I18N |
| 1044 | utf8_version_report(f); |
| 1045 | #endif |
| 1046 | |
| 1047 | for (authi = auths_available; *authi->driver_name != '\0'; ++authi) |
| 1048 | if (authi->version_report) |
| 1049 | (*authi->version_report)(f); |
| 1050 | |
| 1051 | /* PCRE_PRERELEASE is either defined and empty or a bare sequence of |
| 1052 | characters; unless it's an ancient version of PCRE in which case it |
| 1053 | is not defined. */ |
| 1054 | #ifndef PCRE_PRERELEASE |
| 1055 | # define PCRE_PRERELEASE |
| 1056 | #endif |
| 1057 | #define QUOTE(X) #X |
| 1058 | #define EXPAND_AND_QUOTE(X) QUOTE(X) |
| 1059 | fprintf(f, "Library version: PCRE: Compile: %d.%d%s\n" |
| 1060 | " Runtime: %s\n", |
| 1061 | PCRE_MAJOR, PCRE_MINOR, |
| 1062 | EXPAND_AND_QUOTE(PCRE_PRERELEASE) "", |
| 1063 | pcre_version()); |
| 1064 | #undef QUOTE |
| 1065 | #undef EXPAND_AND_QUOTE |
| 1066 | |
| 1067 | init_lookup_list(); |
| 1068 | for (i = 0; i < lookup_list_count; i++) |
| 1069 | if (lookup_list[i]->version_report) |
| 1070 | lookup_list[i]->version_report(f); |
| 1071 | |
| 1072 | #ifdef WHITELIST_D_MACROS |
| 1073 | fprintf(f, "WHITELIST_D_MACROS: \"%s\"\n", WHITELIST_D_MACROS); |
| 1074 | #else |
| 1075 | fprintf(f, "WHITELIST_D_MACROS unset\n"); |
| 1076 | #endif |
| 1077 | #ifdef TRUSTED_CONFIG_LIST |
| 1078 | fprintf(f, "TRUSTED_CONFIG_LIST: \"%s\"\n", TRUSTED_CONFIG_LIST); |
| 1079 | #else |
| 1080 | fprintf(f, "TRUSTED_CONFIG_LIST unset\n"); |
| 1081 | #endif |
| 1082 | |
| 1083 | } while (0); |
| 1084 | } |
| 1085 | |
| 1086 | |
| 1087 | /************************************************* |
| 1088 | * Show auxiliary information about Exim * |
| 1089 | *************************************************/ |
| 1090 | |
| 1091 | static void |
| 1092 | show_exim_information(enum commandline_info request, FILE *stream) |
| 1093 | { |
| 1094 | const uschar **pp; |
| 1095 | |
| 1096 | switch(request) |
| 1097 | { |
| 1098 | case CMDINFO_NONE: |
| 1099 | fprintf(stream, "Oops, something went wrong.\n"); |
| 1100 | return; |
| 1101 | case CMDINFO_HELP: |
| 1102 | fprintf(stream, |
| 1103 | "The -bI: flag takes a string indicating which information to provide.\n" |
| 1104 | "If the string is not recognised, you'll get this help (on stderr).\n" |
| 1105 | "\n" |
| 1106 | " exim -bI:help this information\n" |
| 1107 | " exim -bI:dscp dscp value keywords known\n" |
| 1108 | " exim -bI:sieve list of supported sieve extensions, one per line.\n" |
| 1109 | ); |
| 1110 | return; |
| 1111 | case CMDINFO_SIEVE: |
| 1112 | for (pp = exim_sieve_extension_list; *pp; ++pp) |
| 1113 | fprintf(stream, "%s\n", *pp); |
| 1114 | return; |
| 1115 | case CMDINFO_DSCP: |
| 1116 | dscp_list_to_stream(stream); |
| 1117 | return; |
| 1118 | } |
| 1119 | } |
| 1120 | |
| 1121 | |
| 1122 | /************************************************* |
| 1123 | * Quote a local part * |
| 1124 | *************************************************/ |
| 1125 | |
| 1126 | /* This function is used when a sender address or a From: or Sender: header |
| 1127 | line is being created from the caller's login, or from an authenticated_id. It |
| 1128 | applies appropriate quoting rules for a local part. |
| 1129 | |
| 1130 | Argument: the local part |
| 1131 | Returns: the local part, quoted if necessary |
| 1132 | */ |
| 1133 | |
| 1134 | uschar * |
| 1135 | local_part_quote(uschar *lpart) |
| 1136 | { |
| 1137 | BOOL needs_quote = FALSE; |
| 1138 | int size, ptr; |
| 1139 | uschar *yield; |
| 1140 | uschar *t; |
| 1141 | |
| 1142 | for (t = lpart; !needs_quote && *t != 0; t++) |
| 1143 | { |
| 1144 | needs_quote = !isalnum(*t) && strchr("!#$%&'*+-/=?^_`{|}~", *t) == NULL && |
| 1145 | (*t != '.' || t == lpart || t[1] == 0); |
| 1146 | } |
| 1147 | |
| 1148 | if (!needs_quote) return lpart; |
| 1149 | |
| 1150 | size = ptr = 0; |
| 1151 | yield = string_catn(NULL, &size, &ptr, US"\"", 1); |
| 1152 | |
| 1153 | for (;;) |
| 1154 | { |
| 1155 | uschar *nq = US Ustrpbrk(lpart, "\\\""); |
| 1156 | if (nq == NULL) |
| 1157 | { |
| 1158 | yield = string_cat(yield, &size, &ptr, lpart); |
| 1159 | break; |
| 1160 | } |
| 1161 | yield = string_catn(yield, &size, &ptr, lpart, nq - lpart); |
| 1162 | yield = string_catn(yield, &size, &ptr, US"\\", 1); |
| 1163 | yield = string_catn(yield, &size, &ptr, nq, 1); |
| 1164 | lpart = nq + 1; |
| 1165 | } |
| 1166 | |
| 1167 | yield = string_catn(yield, &size, &ptr, US"\"", 1); |
| 1168 | yield[ptr] = 0; |
| 1169 | return yield; |
| 1170 | } |
| 1171 | |
| 1172 | |
| 1173 | |
| 1174 | #ifdef USE_READLINE |
| 1175 | /************************************************* |
| 1176 | * Load readline() functions * |
| 1177 | *************************************************/ |
| 1178 | |
| 1179 | /* This function is called from testing executions that read data from stdin, |
| 1180 | but only when running as the calling user. Currently, only -be does this. The |
| 1181 | function loads the readline() function library and passes back the functions. |
| 1182 | On some systems, it needs the curses library, so load that too, but try without |
| 1183 | it if loading fails. All this functionality has to be requested at build time. |
| 1184 | |
| 1185 | Arguments: |
| 1186 | fn_readline_ptr pointer to where to put the readline pointer |
| 1187 | fn_addhist_ptr pointer to where to put the addhistory function |
| 1188 | |
| 1189 | Returns: the dlopen handle or NULL on failure |
| 1190 | */ |
| 1191 | |
| 1192 | static void * |
| 1193 | set_readline(char * (**fn_readline_ptr)(const char *), |
| 1194 | void (**fn_addhist_ptr)(const char *)) |
| 1195 | { |
| 1196 | void *dlhandle; |
| 1197 | void *dlhandle_curses = dlopen("libcurses." DYNLIB_FN_EXT, RTLD_GLOBAL|RTLD_LAZY); |
| 1198 | |
| 1199 | dlhandle = dlopen("libreadline." DYNLIB_FN_EXT, RTLD_GLOBAL|RTLD_NOW); |
| 1200 | if (dlhandle_curses != NULL) dlclose(dlhandle_curses); |
| 1201 | |
| 1202 | if (dlhandle != NULL) |
| 1203 | { |
| 1204 | /* Checked manual pages; at least in GNU Readline 6.1, the prototypes are: |
| 1205 | * char * readline (const char *prompt); |
| 1206 | * void add_history (const char *string); |
| 1207 | */ |
| 1208 | *fn_readline_ptr = (char *(*)(const char*))dlsym(dlhandle, "readline"); |
| 1209 | *fn_addhist_ptr = (void(*)(const char*))dlsym(dlhandle, "add_history"); |
| 1210 | } |
| 1211 | else |
| 1212 | { |
| 1213 | DEBUG(D_any) debug_printf("failed to load readline: %s\n", dlerror()); |
| 1214 | } |
| 1215 | |
| 1216 | return dlhandle; |
| 1217 | } |
| 1218 | #endif |
| 1219 | |
| 1220 | |
| 1221 | |
| 1222 | /************************************************* |
| 1223 | * Get a line from stdin for testing things * |
| 1224 | *************************************************/ |
| 1225 | |
| 1226 | /* This function is called when running tests that can take a number of lines |
| 1227 | of input (for example, -be and -bt). It handles continuations and trailing |
| 1228 | spaces. And prompting and a blank line output on eof. If readline() is in use, |
| 1229 | the arguments are non-NULL and provide the relevant functions. |
| 1230 | |
| 1231 | Arguments: |
| 1232 | fn_readline readline function or NULL |
| 1233 | fn_addhist addhist function or NULL |
| 1234 | |
| 1235 | Returns: pointer to dynamic memory, or NULL at end of file |
| 1236 | */ |
| 1237 | |
| 1238 | static uschar * |
| 1239 | get_stdinput(char *(*fn_readline)(const char *), void(*fn_addhist)(const char *)) |
| 1240 | { |
| 1241 | int i; |
| 1242 | int size = 0; |
| 1243 | int ptr = 0; |
| 1244 | uschar *yield = NULL; |
| 1245 | |
| 1246 | if (fn_readline == NULL) { printf("> "); fflush(stdout); } |
| 1247 | |
| 1248 | for (i = 0;; i++) |
| 1249 | { |
| 1250 | uschar buffer[1024]; |
| 1251 | uschar *p, *ss; |
| 1252 | |
| 1253 | #ifdef USE_READLINE |
| 1254 | char *readline_line = NULL; |
| 1255 | if (fn_readline != NULL) |
| 1256 | { |
| 1257 | if ((readline_line = fn_readline((i > 0)? "":"> ")) == NULL) break; |
| 1258 | if (*readline_line != 0 && fn_addhist != NULL) fn_addhist(readline_line); |
| 1259 | p = US readline_line; |
| 1260 | } |
| 1261 | else |
| 1262 | #endif |
| 1263 | |
| 1264 | /* readline() not in use */ |
| 1265 | |
| 1266 | { |
| 1267 | if (Ufgets(buffer, sizeof(buffer), stdin) == NULL) break; |
| 1268 | p = buffer; |
| 1269 | } |
| 1270 | |
| 1271 | /* Handle the line */ |
| 1272 | |
| 1273 | ss = p + (int)Ustrlen(p); |
| 1274 | while (ss > p && isspace(ss[-1])) ss--; |
| 1275 | |
| 1276 | if (i > 0) |
| 1277 | { |
| 1278 | while (p < ss && isspace(*p)) p++; /* leading space after cont */ |
| 1279 | } |
| 1280 | |
| 1281 | yield = string_catn(yield, &size, &ptr, p, ss - p); |
| 1282 | |
| 1283 | #ifdef USE_READLINE |
| 1284 | if (fn_readline != NULL) free(readline_line); |
| 1285 | #endif |
| 1286 | |
| 1287 | /* yield can only be NULL if ss==p */ |
| 1288 | if (ss == p || yield[ptr-1] != '\\') |
| 1289 | { |
| 1290 | if (yield) yield[ptr] = 0; |
| 1291 | break; |
| 1292 | } |
| 1293 | yield[--ptr] = 0; |
| 1294 | } |
| 1295 | |
| 1296 | if (yield == NULL) printf("\n"); |
| 1297 | return yield; |
| 1298 | } |
| 1299 | |
| 1300 | |
| 1301 | |
| 1302 | /************************************************* |
| 1303 | * Output usage information for the program * |
| 1304 | *************************************************/ |
| 1305 | |
| 1306 | /* This function is called when there are no recipients |
| 1307 | or a specific --help argument was added. |
| 1308 | |
| 1309 | Arguments: |
| 1310 | progname information on what name we were called by |
| 1311 | |
| 1312 | Returns: DOES NOT RETURN |
| 1313 | */ |
| 1314 | |
| 1315 | static void |
| 1316 | exim_usage(uschar *progname) |
| 1317 | { |
| 1318 | |
| 1319 | /* Handle specific program invocation varients */ |
| 1320 | if (Ustrcmp(progname, US"-mailq") == 0) |
| 1321 | { |
| 1322 | fprintf(stderr, |
| 1323 | "mailq - list the contents of the mail queue\n\n" |
| 1324 | "For a list of options, see the Exim documentation.\n"); |
| 1325 | exit(EXIT_FAILURE); |
| 1326 | } |
| 1327 | |
| 1328 | /* Generic usage - we output this whatever happens */ |
| 1329 | fprintf(stderr, |
| 1330 | "Exim is a Mail Transfer Agent. It is normally called by Mail User Agents,\n" |
| 1331 | "not directly from a shell command line. Options and/or arguments control\n" |
| 1332 | "what it does when called. For a list of options, see the Exim documentation.\n"); |
| 1333 | |
| 1334 | exit(EXIT_FAILURE); |
| 1335 | } |
| 1336 | |
| 1337 | |
| 1338 | |
| 1339 | /************************************************* |
| 1340 | * Validate that the macros given are okay * |
| 1341 | *************************************************/ |
| 1342 | |
| 1343 | /* Typically, Exim will drop privileges if macros are supplied. In some |
| 1344 | cases, we want to not do so. |
| 1345 | |
| 1346 | Arguments: none (macros is a global) |
| 1347 | Returns: true if trusted, false otherwise |
| 1348 | */ |
| 1349 | |
| 1350 | static BOOL |
| 1351 | macros_trusted(void) |
| 1352 | { |
| 1353 | #ifdef WHITELIST_D_MACROS |
| 1354 | macro_item *m; |
| 1355 | uschar *whitelisted, *end, *p, **whites, **w; |
| 1356 | int white_count, i, n; |
| 1357 | size_t len; |
| 1358 | BOOL prev_char_item, found; |
| 1359 | #endif |
| 1360 | |
| 1361 | if (macros == NULL) |
| 1362 | return TRUE; |
| 1363 | #ifndef WHITELIST_D_MACROS |
| 1364 | return FALSE; |
| 1365 | #else |
| 1366 | |
| 1367 | /* We only trust -D overrides for some invoking users: |
| 1368 | root, the exim run-time user, the optional config owner user. |
| 1369 | I don't know why config-owner would be needed, but since they can own the |
| 1370 | config files anyway, there's no security risk to letting them override -D. */ |
| 1371 | if ( ! ((real_uid == root_uid) |
| 1372 | || (real_uid == exim_uid) |
| 1373 | #ifdef CONFIGURE_OWNER |
| 1374 | || (real_uid == config_uid) |
| 1375 | #endif |
| 1376 | )) |
| 1377 | { |
| 1378 | debug_printf("macros_trusted rejecting macros for uid %d\n", (int) real_uid); |
| 1379 | return FALSE; |
| 1380 | } |
| 1381 | |
| 1382 | /* Get a list of macros which are whitelisted */ |
| 1383 | whitelisted = string_copy_malloc(US WHITELIST_D_MACROS); |
| 1384 | prev_char_item = FALSE; |
| 1385 | white_count = 0; |
| 1386 | for (p = whitelisted; *p != '\0'; ++p) |
| 1387 | { |
| 1388 | if (*p == ':' || isspace(*p)) |
| 1389 | { |
| 1390 | *p = '\0'; |
| 1391 | if (prev_char_item) |
| 1392 | ++white_count; |
| 1393 | prev_char_item = FALSE; |
| 1394 | continue; |
| 1395 | } |
| 1396 | if (!prev_char_item) |
| 1397 | prev_char_item = TRUE; |
| 1398 | } |
| 1399 | end = p; |
| 1400 | if (prev_char_item) |
| 1401 | ++white_count; |
| 1402 | if (!white_count) |
| 1403 | return FALSE; |
| 1404 | whites = store_malloc(sizeof(uschar *) * (white_count+1)); |
| 1405 | for (p = whitelisted, i = 0; (p != end) && (i < white_count); ++p) |
| 1406 | { |
| 1407 | if (*p != '\0') |
| 1408 | { |
| 1409 | whites[i++] = p; |
| 1410 | if (i == white_count) |
| 1411 | break; |
| 1412 | while (*p != '\0' && p < end) |
| 1413 | ++p; |
| 1414 | } |
| 1415 | } |
| 1416 | whites[i] = NULL; |
| 1417 | |
| 1418 | /* The list of macros should be very short. Accept the N*M complexity. */ |
| 1419 | for (m = macros; m != NULL; m = m->next) |
| 1420 | { |
| 1421 | found = FALSE; |
| 1422 | for (w = whites; *w; ++w) |
| 1423 | if (Ustrcmp(*w, m->name) == 0) |
| 1424 | { |
| 1425 | found = TRUE; |
| 1426 | break; |
| 1427 | } |
| 1428 | if (!found) |
| 1429 | return FALSE; |
| 1430 | if (m->replacement == NULL) |
| 1431 | continue; |
| 1432 | len = Ustrlen(m->replacement); |
| 1433 | if (len == 0) |
| 1434 | continue; |
| 1435 | n = pcre_exec(regex_whitelisted_macro, NULL, CS m->replacement, len, |
| 1436 | 0, PCRE_EOPT, NULL, 0); |
| 1437 | if (n < 0) |
| 1438 | { |
| 1439 | if (n != PCRE_ERROR_NOMATCH) |
| 1440 | debug_printf("macros_trusted checking %s returned %d\n", m->name, n); |
| 1441 | return FALSE; |
| 1442 | } |
| 1443 | } |
| 1444 | DEBUG(D_any) debug_printf("macros_trusted overridden to true by whitelisting\n"); |
| 1445 | return TRUE; |
| 1446 | #endif |
| 1447 | } |
| 1448 | |
| 1449 | |
| 1450 | /************************************************* |
| 1451 | * Entry point and high-level code * |
| 1452 | *************************************************/ |
| 1453 | |
| 1454 | /* Entry point for the Exim mailer. Analyse the arguments and arrange to take |
| 1455 | the appropriate action. All the necessary functions are present in the one |
| 1456 | binary. I originally thought one should split it up, but it turns out that so |
| 1457 | much of the apparatus is needed in each chunk that one might as well just have |
| 1458 | it all available all the time, which then makes the coding easier as well. |
| 1459 | |
| 1460 | Arguments: |
| 1461 | argc count of entries in argv |
| 1462 | argv argument strings, with argv[0] being the program name |
| 1463 | |
| 1464 | Returns: EXIT_SUCCESS if terminated successfully |
| 1465 | EXIT_FAILURE otherwise, except when a message has been sent |
| 1466 | to the sender, and -oee was given |
| 1467 | */ |
| 1468 | |
| 1469 | int |
| 1470 | main(int argc, char **cargv) |
| 1471 | { |
| 1472 | uschar **argv = USS cargv; |
| 1473 | int arg_receive_timeout = -1; |
| 1474 | int arg_smtp_receive_timeout = -1; |
| 1475 | int arg_error_handling = error_handling; |
| 1476 | int filter_sfd = -1; |
| 1477 | int filter_ufd = -1; |
| 1478 | int group_count; |
| 1479 | int i, rv; |
| 1480 | int list_queue_option = 0; |
| 1481 | int msg_action = 0; |
| 1482 | int msg_action_arg = -1; |
| 1483 | int namelen = (argv[0] == NULL)? 0 : Ustrlen(argv[0]); |
| 1484 | int queue_only_reason = 0; |
| 1485 | #ifdef EXIM_PERL |
| 1486 | int perl_start_option = 0; |
| 1487 | #endif |
| 1488 | int recipients_arg = argc; |
| 1489 | int sender_address_domain = 0; |
| 1490 | int test_retry_arg = -1; |
| 1491 | int test_rewrite_arg = -1; |
| 1492 | BOOL arg_queue_only = FALSE; |
| 1493 | BOOL bi_option = FALSE; |
| 1494 | BOOL checking = FALSE; |
| 1495 | BOOL count_queue = FALSE; |
| 1496 | BOOL expansion_test = FALSE; |
| 1497 | BOOL extract_recipients = FALSE; |
| 1498 | BOOL flag_G = FALSE; |
| 1499 | BOOL flag_n = FALSE; |
| 1500 | BOOL forced_delivery = FALSE; |
| 1501 | BOOL f_end_dot = FALSE; |
| 1502 | BOOL deliver_give_up = FALSE; |
| 1503 | BOOL list_queue = FALSE; |
| 1504 | BOOL list_options = FALSE; |
| 1505 | BOOL list_config = FALSE; |
| 1506 | BOOL local_queue_only; |
| 1507 | BOOL more = TRUE; |
| 1508 | BOOL one_msg_action = FALSE; |
| 1509 | BOOL queue_only_set = FALSE; |
| 1510 | BOOL receiving_message = TRUE; |
| 1511 | BOOL sender_ident_set = FALSE; |
| 1512 | BOOL session_local_queue_only; |
| 1513 | BOOL unprivileged; |
| 1514 | BOOL removed_privilege = FALSE; |
| 1515 | BOOL usage_wanted = FALSE; |
| 1516 | BOOL verify_address_mode = FALSE; |
| 1517 | BOOL verify_as_sender = FALSE; |
| 1518 | BOOL version_printed = FALSE; |
| 1519 | uschar *alias_arg = NULL; |
| 1520 | uschar *called_as = US""; |
| 1521 | uschar *cmdline_syslog_name = NULL; |
| 1522 | uschar *start_queue_run_id = NULL; |
| 1523 | uschar *stop_queue_run_id = NULL; |
| 1524 | uschar *expansion_test_message = NULL; |
| 1525 | uschar *ftest_domain = NULL; |
| 1526 | uschar *ftest_localpart = NULL; |
| 1527 | uschar *ftest_prefix = NULL; |
| 1528 | uschar *ftest_suffix = NULL; |
| 1529 | uschar *log_oneline = NULL; |
| 1530 | uschar *malware_test_file = NULL; |
| 1531 | uschar *real_sender_address; |
| 1532 | uschar *originator_home = US"/"; |
| 1533 | size_t sz; |
| 1534 | void *reset_point; |
| 1535 | |
| 1536 | struct passwd *pw; |
| 1537 | struct stat statbuf; |
| 1538 | pid_t passed_qr_pid = (pid_t)0; |
| 1539 | int passed_qr_pipe = -1; |
| 1540 | gid_t group_list[NGROUPS_MAX]; |
| 1541 | |
| 1542 | /* For the -bI: flag */ |
| 1543 | enum commandline_info info_flag = CMDINFO_NONE; |
| 1544 | BOOL info_stdout = FALSE; |
| 1545 | |
| 1546 | /* Possible options for -R and -S */ |
| 1547 | |
| 1548 | static uschar *rsopts[] = { US"f", US"ff", US"r", US"rf", US"rff" }; |
| 1549 | |
| 1550 | /* Need to define this in case we need to change the environment in order |
| 1551 | to get rid of a bogus time zone. We have to make it char rather than uschar |
| 1552 | because some OS define it in /usr/include/unistd.h. */ |
| 1553 | |
| 1554 | extern char **environ; |
| 1555 | |
| 1556 | /* If the Exim user and/or group and/or the configuration file owner/group were |
| 1557 | defined by ref:name at build time, we must now find the actual uid/gid values. |
| 1558 | This is a feature to make the lives of binary distributors easier. */ |
| 1559 | |
| 1560 | #ifdef EXIM_USERNAME |
| 1561 | if (route_finduser(US EXIM_USERNAME, &pw, &exim_uid)) |
| 1562 | { |
| 1563 | if (exim_uid == 0) |
| 1564 | { |
| 1565 | fprintf(stderr, "exim: refusing to run with uid 0 for \"%s\"\n", |
| 1566 | EXIM_USERNAME); |
| 1567 | exit(EXIT_FAILURE); |
| 1568 | } |
| 1569 | /* If ref:name uses a number as the name, route_finduser() returns |
| 1570 | TRUE with exim_uid set and pw coerced to NULL. */ |
| 1571 | if (pw) |
| 1572 | exim_gid = pw->pw_gid; |
| 1573 | #ifndef EXIM_GROUPNAME |
| 1574 | else |
| 1575 | { |
| 1576 | fprintf(stderr, |
| 1577 | "exim: ref:name should specify a usercode, not a group.\n" |
| 1578 | "exim: can't let you get away with it unless you also specify a group.\n"); |
| 1579 | exit(EXIT_FAILURE); |
| 1580 | } |
| 1581 | #endif |
| 1582 | } |
| 1583 | else |
| 1584 | { |
| 1585 | fprintf(stderr, "exim: failed to find uid for user name \"%s\"\n", |
| 1586 | EXIM_USERNAME); |
| 1587 | exit(EXIT_FAILURE); |
| 1588 | } |
| 1589 | #endif |
| 1590 | |
| 1591 | #ifdef EXIM_GROUPNAME |
| 1592 | if (!route_findgroup(US EXIM_GROUPNAME, &exim_gid)) |
| 1593 | { |
| 1594 | fprintf(stderr, "exim: failed to find gid for group name \"%s\"\n", |
| 1595 | EXIM_GROUPNAME); |
| 1596 | exit(EXIT_FAILURE); |
| 1597 | } |
| 1598 | #endif |
| 1599 | |
| 1600 | #ifdef CONFIGURE_OWNERNAME |
| 1601 | if (!route_finduser(US CONFIGURE_OWNERNAME, NULL, &config_uid)) |
| 1602 | { |
| 1603 | fprintf(stderr, "exim: failed to find uid for user name \"%s\"\n", |
| 1604 | CONFIGURE_OWNERNAME); |
| 1605 | exit(EXIT_FAILURE); |
| 1606 | } |
| 1607 | #endif |
| 1608 | |
| 1609 | /* We default the system_filter_user to be the Exim run-time user, as a |
| 1610 | sane non-root value. */ |
| 1611 | system_filter_uid = exim_uid; |
| 1612 | |
| 1613 | #ifdef CONFIGURE_GROUPNAME |
| 1614 | if (!route_findgroup(US CONFIGURE_GROUPNAME, &config_gid)) |
| 1615 | { |
| 1616 | fprintf(stderr, "exim: failed to find gid for group name \"%s\"\n", |
| 1617 | CONFIGURE_GROUPNAME); |
| 1618 | exit(EXIT_FAILURE); |
| 1619 | } |
| 1620 | #endif |
| 1621 | |
| 1622 | /* In the Cygwin environment, some initialization used to need doing. |
| 1623 | It was fudged in by means of this macro; now no longer but we'll leave |
| 1624 | it in case of others. */ |
| 1625 | |
| 1626 | #ifdef OS_INIT |
| 1627 | OS_INIT |
| 1628 | #endif |
| 1629 | |
| 1630 | /* Check a field which is patched when we are running Exim within its |
| 1631 | testing harness; do a fast initial check, and then the whole thing. */ |
| 1632 | |
| 1633 | running_in_test_harness = |
| 1634 | *running_status == '<' && Ustrcmp(running_status, "<<<testing>>>") == 0; |
| 1635 | |
| 1636 | /* The C standard says that the equivalent of setlocale(LC_ALL, "C") is obeyed |
| 1637 | at the start of a program; however, it seems that some environments do not |
| 1638 | follow this. A "strange" locale can affect the formatting of timestamps, so we |
| 1639 | make quite sure. */ |
| 1640 | |
| 1641 | setlocale(LC_ALL, "C"); |
| 1642 | |
| 1643 | /* Set up the default handler for timing using alarm(). */ |
| 1644 | |
| 1645 | os_non_restarting_signal(SIGALRM, sigalrm_handler); |
| 1646 | |
| 1647 | /* Ensure we have a buffer for constructing log entries. Use malloc directly, |
| 1648 | because store_malloc writes a log entry on failure. */ |
| 1649 | |
| 1650 | log_buffer = (uschar *)malloc(LOG_BUFFER_SIZE); |
| 1651 | if (log_buffer == NULL) |
| 1652 | { |
| 1653 | fprintf(stderr, "exim: failed to get store for log buffer\n"); |
| 1654 | exit(EXIT_FAILURE); |
| 1655 | } |
| 1656 | |
| 1657 | /* Initialize the default log options. */ |
| 1658 | |
| 1659 | bits_set(log_selector, log_selector_size, log_default); |
| 1660 | |
| 1661 | /* Set log_stderr to stderr, provided that stderr exists. This gets reset to |
| 1662 | NULL when the daemon is run and the file is closed. We have to use this |
| 1663 | indirection, because some systems don't allow writing to the variable "stderr". |
| 1664 | */ |
| 1665 | |
| 1666 | if (fstat(fileno(stderr), &statbuf) >= 0) log_stderr = stderr; |
| 1667 | |
| 1668 | /* Arrange for the PCRE regex library to use our store functions. Note that |
| 1669 | the normal calls are actually macros that add additional arguments for |
| 1670 | debugging purposes so we have to assign specially constructed functions here. |
| 1671 | The default is to use store in the stacking pool, but this is overridden in the |
| 1672 | regex_must_compile() function. */ |
| 1673 | |
| 1674 | pcre_malloc = function_store_get; |
| 1675 | pcre_free = function_dummy_free; |
| 1676 | |
| 1677 | /* Ensure there is a big buffer for temporary use in several places. It is put |
| 1678 | in malloc store so that it can be freed for enlargement if necessary. */ |
| 1679 | |
| 1680 | big_buffer = store_malloc(big_buffer_size); |
| 1681 | |
| 1682 | /* Set up the handler for the data request signal, and set the initial |
| 1683 | descriptive text. */ |
| 1684 | |
| 1685 | set_process_info("initializing"); |
| 1686 | os_restarting_signal(SIGUSR1, usr1_handler); |
| 1687 | |
| 1688 | /* SIGHUP is used to get the daemon to reconfigure. It gets set as appropriate |
| 1689 | in the daemon code. For the rest of Exim's uses, we ignore it. */ |
| 1690 | |
| 1691 | signal(SIGHUP, SIG_IGN); |
| 1692 | |
| 1693 | /* We don't want to die on pipe errors as the code is written to handle |
| 1694 | the write error instead. */ |
| 1695 | |
| 1696 | signal(SIGPIPE, SIG_IGN); |
| 1697 | |
| 1698 | /* Under some circumstance on some OS, Exim can get called with SIGCHLD |
| 1699 | set to SIG_IGN. This causes subprocesses that complete before the parent |
| 1700 | process waits for them not to hang around, so when Exim calls wait(), nothing |
| 1701 | is there. The wait() code has been made robust against this, but let's ensure |
| 1702 | that SIGCHLD is set to SIG_DFL, because it's tidier to wait and get a process |
| 1703 | ending status. We use sigaction rather than plain signal() on those OS where |
| 1704 | SA_NOCLDWAIT exists, because we want to be sure it is turned off. (There was a |
| 1705 | problem on AIX with this.) */ |
| 1706 | |
| 1707 | #ifdef SA_NOCLDWAIT |
| 1708 | { |
| 1709 | struct sigaction act; |
| 1710 | act.sa_handler = SIG_DFL; |
| 1711 | sigemptyset(&(act.sa_mask)); |
| 1712 | act.sa_flags = 0; |
| 1713 | sigaction(SIGCHLD, &act, NULL); |
| 1714 | } |
| 1715 | #else |
| 1716 | signal(SIGCHLD, SIG_DFL); |
| 1717 | #endif |
| 1718 | |
| 1719 | /* Save the arguments for use if we re-exec exim as a daemon after receiving |
| 1720 | SIGHUP. */ |
| 1721 | |
| 1722 | sighup_argv = argv; |
| 1723 | |
| 1724 | /* Set up the version number. Set up the leading 'E' for the external form of |
| 1725 | message ids, set the pointer to the internal form, and initialize it to |
| 1726 | indicate no message being processed. */ |
| 1727 | |
| 1728 | version_init(); |
| 1729 | message_id_option[0] = '-'; |
| 1730 | message_id_external = message_id_option + 1; |
| 1731 | message_id_external[0] = 'E'; |
| 1732 | message_id = message_id_external + 1; |
| 1733 | message_id[0] = 0; |
| 1734 | |
| 1735 | /* Set the umask to zero so that any files Exim creates using open() are |
| 1736 | created with the modes that it specifies. NOTE: Files created with fopen() have |
| 1737 | a problem, which was not recognized till rather late (February 2006). With this |
| 1738 | umask, such files will be world writeable. (They are all content scanning files |
| 1739 | in the spool directory, which isn't world-accessible, so this is not a |
| 1740 | disaster, but it's untidy.) I don't want to change this overall setting, |
| 1741 | however, because it will interact badly with the open() calls. Instead, there's |
| 1742 | now a function called modefopen() that fiddles with the umask while calling |
| 1743 | fopen(). */ |
| 1744 | |
| 1745 | (void)umask(0); |
| 1746 | |
| 1747 | /* Precompile the regular expression for matching a message id. Keep this in |
| 1748 | step with the code that generates ids in the accept.c module. We need to do |
| 1749 | this here, because the -M options check their arguments for syntactic validity |
| 1750 | using mac_ismsgid, which uses this. */ |
| 1751 | |
| 1752 | regex_ismsgid = |
| 1753 | regex_must_compile(US"^(?:[^\\W_]{6}-){2}[^\\W_]{2}$", FALSE, TRUE); |
| 1754 | |
| 1755 | /* Precompile the regular expression that is used for matching an SMTP error |
| 1756 | code, possibly extended, at the start of an error message. Note that the |
| 1757 | terminating whitespace character is included. */ |
| 1758 | |
| 1759 | regex_smtp_code = |
| 1760 | regex_must_compile(US"^\\d\\d\\d\\s(?:\\d\\.\\d\\d?\\d?\\.\\d\\d?\\d?\\s)?", |
| 1761 | FALSE, TRUE); |
| 1762 | |
| 1763 | #ifdef WHITELIST_D_MACROS |
| 1764 | /* Precompile the regular expression used to filter the content of macros |
| 1765 | given to -D for permissibility. */ |
| 1766 | |
| 1767 | regex_whitelisted_macro = |
| 1768 | regex_must_compile(US"^[A-Za-z0-9_/.-]*$", FALSE, TRUE); |
| 1769 | #endif |
| 1770 | |
| 1771 | for (i = 0; i < REGEX_VARS; i++) regex_vars[i] = NULL; |
| 1772 | |
| 1773 | /* If the program is called as "mailq" treat it as equivalent to "exim -bp"; |
| 1774 | this seems to be a generally accepted convention, since one finds symbolic |
| 1775 | links called "mailq" in standard OS configurations. */ |
| 1776 | |
| 1777 | if ((namelen == 5 && Ustrcmp(argv[0], "mailq") == 0) || |
| 1778 | (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/mailq", 6) == 0)) |
| 1779 | { |
| 1780 | list_queue = TRUE; |
| 1781 | receiving_message = FALSE; |
| 1782 | called_as = US"-mailq"; |
| 1783 | } |
| 1784 | |
| 1785 | /* If the program is called as "rmail" treat it as equivalent to |
| 1786 | "exim -i -oee", thus allowing UUCP messages to be input using non-SMTP mode, |
| 1787 | i.e. preventing a single dot on a line from terminating the message, and |
| 1788 | returning with zero return code, even in cases of error (provided an error |
| 1789 | message has been sent). */ |
| 1790 | |
| 1791 | if ((namelen == 5 && Ustrcmp(argv[0], "rmail") == 0) || |
| 1792 | (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/rmail", 6) == 0)) |
| 1793 | { |
| 1794 | dot_ends = FALSE; |
| 1795 | called_as = US"-rmail"; |
| 1796 | errors_sender_rc = EXIT_SUCCESS; |
| 1797 | } |
| 1798 | |
| 1799 | /* If the program is called as "rsmtp" treat it as equivalent to "exim -bS"; |
| 1800 | this is a smail convention. */ |
| 1801 | |
| 1802 | if ((namelen == 5 && Ustrcmp(argv[0], "rsmtp") == 0) || |
| 1803 | (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/rsmtp", 6) == 0)) |
| 1804 | { |
| 1805 | smtp_input = smtp_batched_input = TRUE; |
| 1806 | called_as = US"-rsmtp"; |
| 1807 | } |
| 1808 | |
| 1809 | /* If the program is called as "runq" treat it as equivalent to "exim -q"; |
| 1810 | this is a smail convention. */ |
| 1811 | |
| 1812 | if ((namelen == 4 && Ustrcmp(argv[0], "runq") == 0) || |
| 1813 | (namelen > 4 && Ustrncmp(argv[0] + namelen - 5, "/runq", 5) == 0)) |
| 1814 | { |
| 1815 | queue_interval = 0; |
| 1816 | receiving_message = FALSE; |
| 1817 | called_as = US"-runq"; |
| 1818 | } |
| 1819 | |
| 1820 | /* If the program is called as "newaliases" treat it as equivalent to |
| 1821 | "exim -bi"; this is a sendmail convention. */ |
| 1822 | |
| 1823 | if ((namelen == 10 && Ustrcmp(argv[0], "newaliases") == 0) || |
| 1824 | (namelen > 10 && Ustrncmp(argv[0] + namelen - 11, "/newaliases", 11) == 0)) |
| 1825 | { |
| 1826 | bi_option = TRUE; |
| 1827 | receiving_message = FALSE; |
| 1828 | called_as = US"-newaliases"; |
| 1829 | } |
| 1830 | |
| 1831 | /* Save the original effective uid for a couple of uses later. It should |
| 1832 | normally be root, but in some esoteric environments it may not be. */ |
| 1833 | |
| 1834 | original_euid = geteuid(); |
| 1835 | |
| 1836 | /* Get the real uid and gid. If the caller is root, force the effective uid/gid |
| 1837 | to be the same as the real ones. This makes a difference only if Exim is setuid |
| 1838 | (or setgid) to something other than root, which could be the case in some |
| 1839 | special configurations. */ |
| 1840 | |
| 1841 | real_uid = getuid(); |
| 1842 | real_gid = getgid(); |
| 1843 | |
| 1844 | if (real_uid == root_uid) |
| 1845 | { |
| 1846 | rv = setgid(real_gid); |
| 1847 | if (rv) |
| 1848 | { |
| 1849 | fprintf(stderr, "exim: setgid(%ld) failed: %s\n", |
| 1850 | (long int)real_gid, strerror(errno)); |
| 1851 | exit(EXIT_FAILURE); |
| 1852 | } |
| 1853 | rv = setuid(real_uid); |
| 1854 | if (rv) |
| 1855 | { |
| 1856 | fprintf(stderr, "exim: setuid(%ld) failed: %s\n", |
| 1857 | (long int)real_uid, strerror(errno)); |
| 1858 | exit(EXIT_FAILURE); |
| 1859 | } |
| 1860 | } |
| 1861 | |
| 1862 | /* If neither the original real uid nor the original euid was root, Exim is |
| 1863 | running in an unprivileged state. */ |
| 1864 | |
| 1865 | unprivileged = (real_uid != root_uid && original_euid != root_uid); |
| 1866 | |
| 1867 | /* Scan the program's arguments. Some can be dealt with right away; others are |
| 1868 | simply recorded for checking and handling afterwards. Do a high-level switch |
| 1869 | on the second character (the one after '-'), to save some effort. */ |
| 1870 | |
| 1871 | for (i = 1; i < argc; i++) |
| 1872 | { |
| 1873 | BOOL badarg = FALSE; |
| 1874 | uschar *arg = argv[i]; |
| 1875 | uschar *argrest; |
| 1876 | int switchchar; |
| 1877 | |
| 1878 | /* An argument not starting with '-' is the start of a recipients list; |
| 1879 | break out of the options-scanning loop. */ |
| 1880 | |
| 1881 | if (arg[0] != '-') |
| 1882 | { |
| 1883 | recipients_arg = i; |
| 1884 | break; |
| 1885 | } |
| 1886 | |
| 1887 | /* An option consistion of -- terminates the options */ |
| 1888 | |
| 1889 | if (Ustrcmp(arg, "--") == 0) |
| 1890 | { |
| 1891 | recipients_arg = i + 1; |
| 1892 | break; |
| 1893 | } |
| 1894 | |
| 1895 | /* Handle flagged options */ |
| 1896 | |
| 1897 | switchchar = arg[1]; |
| 1898 | argrest = arg+2; |
| 1899 | |
| 1900 | /* Make all -ex options synonymous with -oex arguments, since that |
| 1901 | is assumed by various callers. Also make -qR options synonymous with -R |
| 1902 | options, as that seems to be required as well. Allow for -qqR too, and |
| 1903 | the same for -S options. */ |
| 1904 | |
| 1905 | if (Ustrncmp(arg+1, "oe", 2) == 0 || |
| 1906 | Ustrncmp(arg+1, "qR", 2) == 0 || |
| 1907 | Ustrncmp(arg+1, "qS", 2) == 0) |
| 1908 | { |
| 1909 | switchchar = arg[2]; |
| 1910 | argrest++; |
| 1911 | } |
| 1912 | else if (Ustrncmp(arg+1, "qqR", 3) == 0 || Ustrncmp(arg+1, "qqS", 3) == 0) |
| 1913 | { |
| 1914 | switchchar = arg[3]; |
| 1915 | argrest += 2; |
| 1916 | queue_2stage = TRUE; |
| 1917 | } |
| 1918 | |
| 1919 | /* Make -r synonymous with -f, since it is a documented alias */ |
| 1920 | |
| 1921 | else if (arg[1] == 'r') switchchar = 'f'; |
| 1922 | |
| 1923 | /* Make -ov synonymous with -v */ |
| 1924 | |
| 1925 | else if (Ustrcmp(arg, "-ov") == 0) |
| 1926 | { |
| 1927 | switchchar = 'v'; |
| 1928 | argrest++; |
| 1929 | } |
| 1930 | |
| 1931 | /* deal with --option_aliases */ |
| 1932 | else if (switchchar == '-') |
| 1933 | { |
| 1934 | if (Ustrcmp(argrest, "help") == 0) |
| 1935 | { |
| 1936 | usage_wanted = TRUE; |
| 1937 | break; |
| 1938 | } |
| 1939 | else if (Ustrcmp(argrest, "version") == 0) |
| 1940 | { |
| 1941 | switchchar = 'b'; |
| 1942 | argrest = US"V"; |
| 1943 | } |
| 1944 | } |
| 1945 | |
| 1946 | /* High-level switch on active initial letter */ |
| 1947 | |
| 1948 | switch(switchchar) |
| 1949 | { |
| 1950 | |
| 1951 | /* sendmail uses -Ac and -Am to control which .cf file is used; |
| 1952 | we ignore them. */ |
| 1953 | case 'A': |
| 1954 | if (*argrest == '\0') { badarg = TRUE; break; } |
| 1955 | else |
| 1956 | { |
| 1957 | BOOL ignore = FALSE; |
| 1958 | switch (*argrest) |
| 1959 | { |
| 1960 | case 'c': |
| 1961 | case 'm': |
| 1962 | if (*(argrest + 1) == '\0') |
| 1963 | ignore = TRUE; |
| 1964 | break; |
| 1965 | } |
| 1966 | if (!ignore) { badarg = TRUE; break; } |
| 1967 | } |
| 1968 | break; |
| 1969 | |
| 1970 | /* -Btype is a sendmail option for 7bit/8bit setting. Exim is 8-bit clean |
| 1971 | so has no need of it. */ |
| 1972 | |
| 1973 | case 'B': |
| 1974 | if (*argrest == 0) i++; /* Skip over the type */ |
| 1975 | break; |
| 1976 | |
| 1977 | |
| 1978 | case 'b': |
| 1979 | receiving_message = FALSE; /* Reset TRUE for -bm, -bS, -bs below */ |
| 1980 | |
| 1981 | /* -bd: Run in daemon mode, awaiting SMTP connections. |
| 1982 | -bdf: Ditto, but in the foreground. |
| 1983 | */ |
| 1984 | |
| 1985 | if (*argrest == 'd') |
| 1986 | { |
| 1987 | daemon_listen = TRUE; |
| 1988 | if (*(++argrest) == 'f') background_daemon = FALSE; |
| 1989 | else if (*argrest != 0) { badarg = TRUE; break; } |
| 1990 | } |
| 1991 | |
| 1992 | /* -be: Run in expansion test mode |
| 1993 | -bem: Ditto, but read a message from a file first |
| 1994 | */ |
| 1995 | |
| 1996 | else if (*argrest == 'e') |
| 1997 | { |
| 1998 | expansion_test = checking = TRUE; |
| 1999 | if (argrest[1] == 'm') |
| 2000 | { |
| 2001 | if (++i >= argc) { badarg = TRUE; break; } |
| 2002 | expansion_test_message = argv[i]; |
| 2003 | argrest++; |
| 2004 | } |
| 2005 | if (argrest[1] != 0) { badarg = TRUE; break; } |
| 2006 | } |
| 2007 | |
| 2008 | /* -bF: Run system filter test */ |
| 2009 | |
| 2010 | else if (*argrest == 'F') |
| 2011 | { |
| 2012 | filter_test |= checking = FTEST_SYSTEM; |
| 2013 | if (*(++argrest) != 0) { badarg = TRUE; break; } |
| 2014 | if (++i < argc) filter_test_sfile = argv[i]; else |
| 2015 | { |
| 2016 | fprintf(stderr, "exim: file name expected after %s\n", argv[i-1]); |
| 2017 | exit(EXIT_FAILURE); |
| 2018 | } |
| 2019 | } |
| 2020 | |
| 2021 | /* -bf: Run user filter test |
| 2022 | -bfd: Set domain for filter testing |
| 2023 | -bfl: Set local part for filter testing |
| 2024 | -bfp: Set prefix for filter testing |
| 2025 | -bfs: Set suffix for filter testing |
| 2026 | */ |
| 2027 | |
| 2028 | else if (*argrest == 'f') |
| 2029 | { |
| 2030 | if (*(++argrest) == 0) |
| 2031 | { |
| 2032 | filter_test |= checking = FTEST_USER; |
| 2033 | if (++i < argc) filter_test_ufile = argv[i]; else |
| 2034 | { |
| 2035 | fprintf(stderr, "exim: file name expected after %s\n", argv[i-1]); |
| 2036 | exit(EXIT_FAILURE); |
| 2037 | } |
| 2038 | } |
| 2039 | else |
| 2040 | { |
| 2041 | if (++i >= argc) |
| 2042 | { |
| 2043 | fprintf(stderr, "exim: string expected after %s\n", arg); |
| 2044 | exit(EXIT_FAILURE); |
| 2045 | } |
| 2046 | if (Ustrcmp(argrest, "d") == 0) ftest_domain = argv[i]; |
| 2047 | else if (Ustrcmp(argrest, "l") == 0) ftest_localpart = argv[i]; |
| 2048 | else if (Ustrcmp(argrest, "p") == 0) ftest_prefix = argv[i]; |
| 2049 | else if (Ustrcmp(argrest, "s") == 0) ftest_suffix = argv[i]; |
| 2050 | else { badarg = TRUE; break; } |
| 2051 | } |
| 2052 | } |
| 2053 | |
| 2054 | /* -bh: Host checking - an IP address must follow. */ |
| 2055 | |
| 2056 | else if (Ustrcmp(argrest, "h") == 0 || Ustrcmp(argrest, "hc") == 0) |
| 2057 | { |
| 2058 | if (++i >= argc) { badarg = TRUE; break; } |
| 2059 | sender_host_address = argv[i]; |
| 2060 | host_checking = checking = log_testing_mode = TRUE; |
| 2061 | host_checking_callout = argrest[1] == 'c'; |
| 2062 | message_logs = FALSE; |
| 2063 | } |
| 2064 | |
| 2065 | /* -bi: This option is used by sendmail to initialize *the* alias file, |
| 2066 | though it has the -oA option to specify a different file. Exim has no |
| 2067 | concept of *the* alias file, but since Sun's YP make script calls |
| 2068 | sendmail this way, some support must be provided. */ |
| 2069 | |
| 2070 | else if (Ustrcmp(argrest, "i") == 0) bi_option = TRUE; |
| 2071 | |
| 2072 | /* -bI: provide information, of the type to follow after a colon. |
| 2073 | This is an Exim flag. */ |
| 2074 | |
| 2075 | else if (argrest[0] == 'I' && Ustrlen(argrest) >= 2 && argrest[1] == ':') |
| 2076 | { |
| 2077 | uschar *p = &argrest[2]; |
| 2078 | info_flag = CMDINFO_HELP; |
| 2079 | if (Ustrlen(p)) |
| 2080 | { |
| 2081 | if (strcmpic(p, CUS"sieve") == 0) |
| 2082 | { |
| 2083 | info_flag = CMDINFO_SIEVE; |
| 2084 | info_stdout = TRUE; |
| 2085 | } |
| 2086 | else if (strcmpic(p, CUS"dscp") == 0) |
| 2087 | { |
| 2088 | info_flag = CMDINFO_DSCP; |
| 2089 | info_stdout = TRUE; |
| 2090 | } |
| 2091 | else if (strcmpic(p, CUS"help") == 0) |
| 2092 | { |
| 2093 | info_stdout = TRUE; |
| 2094 | } |
| 2095 | } |
| 2096 | } |
| 2097 | |
| 2098 | /* -bm: Accept and deliver message - the default option. Reinstate |
| 2099 | receiving_message, which got turned off for all -b options. */ |
| 2100 | |
| 2101 | else if (Ustrcmp(argrest, "m") == 0) receiving_message = TRUE; |
| 2102 | |
| 2103 | /* -bmalware: test the filename given for malware */ |
| 2104 | |
| 2105 | else if (Ustrcmp(argrest, "malware") == 0) |
| 2106 | { |
| 2107 | if (++i >= argc) { badarg = TRUE; break; } |
| 2108 | checking = TRUE; |
| 2109 | malware_test_file = argv[i]; |
| 2110 | } |
| 2111 | |
| 2112 | /* -bnq: For locally originating messages, do not qualify unqualified |
| 2113 | addresses. In the envelope, this causes errors; in header lines they |
| 2114 | just get left. */ |
| 2115 | |
| 2116 | else if (Ustrcmp(argrest, "nq") == 0) |
| 2117 | { |
| 2118 | allow_unqualified_sender = FALSE; |
| 2119 | allow_unqualified_recipient = FALSE; |
| 2120 | } |
| 2121 | |
| 2122 | /* -bpxx: List the contents of the mail queue, in various forms. If |
| 2123 | the option is -bpc, just a queue count is needed. Otherwise, if the |
| 2124 | first letter after p is r, then order is random. */ |
| 2125 | |
| 2126 | else if (*argrest == 'p') |
| 2127 | { |
| 2128 | if (*(++argrest) == 'c') |
| 2129 | { |
| 2130 | count_queue = TRUE; |
| 2131 | if (*(++argrest) != 0) badarg = TRUE; |
| 2132 | break; |
| 2133 | } |
| 2134 | |
| 2135 | if (*argrest == 'r') |
| 2136 | { |
| 2137 | list_queue_option = 8; |
| 2138 | argrest++; |
| 2139 | } |
| 2140 | else list_queue_option = 0; |
| 2141 | |
| 2142 | list_queue = TRUE; |
| 2143 | |
| 2144 | /* -bp: List the contents of the mail queue, top-level only */ |
| 2145 | |
| 2146 | if (*argrest == 0) {} |
| 2147 | |
| 2148 | /* -bpu: List the contents of the mail queue, top-level undelivered */ |
| 2149 | |
| 2150 | else if (Ustrcmp(argrest, "u") == 0) list_queue_option += 1; |
| 2151 | |
| 2152 | /* -bpa: List the contents of the mail queue, including all delivered */ |
| 2153 | |
| 2154 | else if (Ustrcmp(argrest, "a") == 0) list_queue_option += 2; |
| 2155 | |
| 2156 | /* Unknown after -bp[r] */ |
| 2157 | |
| 2158 | else |
| 2159 | { |
| 2160 | badarg = TRUE; |
| 2161 | break; |
| 2162 | } |
| 2163 | } |
| 2164 | |
| 2165 | |
| 2166 | /* -bP: List the configuration variables given as the address list. |
| 2167 | Force -v, so configuration errors get displayed. */ |
| 2168 | |
| 2169 | else if (Ustrcmp(argrest, "P") == 0) |
| 2170 | { |
| 2171 | /* -bP config: we need to setup here, because later, |
| 2172 | * when list_options is checked, the config is read already */ |
| 2173 | if (argv[i+1] && Ustrcmp(argv[i+1], "config") == 0) |
| 2174 | { |
| 2175 | list_config = TRUE; |
| 2176 | readconf_save_config(version_string); |
| 2177 | } |
| 2178 | else |
| 2179 | { |
| 2180 | list_options = TRUE; |
| 2181 | debug_selector |= D_v; |
| 2182 | debug_file = stderr; |
| 2183 | } |
| 2184 | } |
| 2185 | |
| 2186 | /* -brt: Test retry configuration lookup */ |
| 2187 | |
| 2188 | else if (Ustrcmp(argrest, "rt") == 0) |
| 2189 | { |
| 2190 | checking = TRUE; |
| 2191 | test_retry_arg = i + 1; |
| 2192 | goto END_ARG; |
| 2193 | } |
| 2194 | |
| 2195 | /* -brw: Test rewrite configuration */ |
| 2196 | |
| 2197 | else if (Ustrcmp(argrest, "rw") == 0) |
| 2198 | { |
| 2199 | checking = TRUE; |
| 2200 | test_rewrite_arg = i + 1; |
| 2201 | goto END_ARG; |
| 2202 | } |
| 2203 | |
| 2204 | /* -bS: Read SMTP commands on standard input, but produce no replies - |
| 2205 | all errors are reported by sending messages. */ |
| 2206 | |
| 2207 | else if (Ustrcmp(argrest, "S") == 0) |
| 2208 | smtp_input = smtp_batched_input = receiving_message = TRUE; |
| 2209 | |
| 2210 | /* -bs: Read SMTP commands on standard input and produce SMTP replies |
| 2211 | on standard output. */ |
| 2212 | |
| 2213 | else if (Ustrcmp(argrest, "s") == 0) smtp_input = receiving_message = TRUE; |
| 2214 | |
| 2215 | /* -bt: address testing mode */ |
| 2216 | |
| 2217 | else if (Ustrcmp(argrest, "t") == 0) |
| 2218 | address_test_mode = checking = log_testing_mode = TRUE; |
| 2219 | |
| 2220 | /* -bv: verify addresses */ |
| 2221 | |
| 2222 | else if (Ustrcmp(argrest, "v") == 0) |
| 2223 | verify_address_mode = checking = log_testing_mode = TRUE; |
| 2224 | |
| 2225 | /* -bvs: verify sender addresses */ |
| 2226 | |
| 2227 | else if (Ustrcmp(argrest, "vs") == 0) |
| 2228 | { |
| 2229 | verify_address_mode = checking = log_testing_mode = TRUE; |
| 2230 | verify_as_sender = TRUE; |
| 2231 | } |
| 2232 | |
| 2233 | /* -bV: Print version string and support details */ |
| 2234 | |
| 2235 | else if (Ustrcmp(argrest, "V") == 0) |
| 2236 | { |
| 2237 | printf("Exim version %s #%s built %s\n", version_string, |
| 2238 | version_cnumber, version_date); |
| 2239 | printf("%s\n", CS version_copyright); |
| 2240 | version_printed = TRUE; |
| 2241 | show_whats_supported(stdout); |
| 2242 | log_testing_mode = TRUE; |
| 2243 | } |
| 2244 | |
| 2245 | /* -bw: inetd wait mode, accept a listening socket as stdin */ |
| 2246 | |
| 2247 | else if (*argrest == 'w') |
| 2248 | { |
| 2249 | inetd_wait_mode = TRUE; |
| 2250 | background_daemon = FALSE; |
| 2251 | daemon_listen = TRUE; |
| 2252 | if (*(++argrest) != '\0') |
| 2253 | { |
| 2254 | inetd_wait_timeout = readconf_readtime(argrest, 0, FALSE); |
| 2255 | if (inetd_wait_timeout <= 0) |
| 2256 | { |
| 2257 | fprintf(stderr, "exim: bad time value %s: abandoned\n", argv[i]); |
| 2258 | exit(EXIT_FAILURE); |
| 2259 | } |
| 2260 | } |
| 2261 | } |
| 2262 | |
| 2263 | else badarg = TRUE; |
| 2264 | break; |
| 2265 | |
| 2266 | |
| 2267 | /* -C: change configuration file list; ignore if it isn't really |
| 2268 | a change! Enforce a prefix check if required. */ |
| 2269 | |
| 2270 | case 'C': |
| 2271 | if (*argrest == 0) |
| 2272 | { |
| 2273 | if(++i < argc) argrest = argv[i]; else |
| 2274 | { badarg = TRUE; break; } |
| 2275 | } |
| 2276 | if (Ustrcmp(config_main_filelist, argrest) != 0) |
| 2277 | { |
| 2278 | #ifdef ALT_CONFIG_PREFIX |
| 2279 | int sep = 0; |
| 2280 | int len = Ustrlen(ALT_CONFIG_PREFIX); |
| 2281 | uschar *list = argrest; |
| 2282 | uschar *filename; |
| 2283 | while((filename = string_nextinlist(&list, &sep, big_buffer, |
| 2284 | big_buffer_size)) != NULL) |
| 2285 | { |
| 2286 | if ((Ustrlen(filename) < len || |
| 2287 | Ustrncmp(filename, ALT_CONFIG_PREFIX, len) != 0 || |
| 2288 | Ustrstr(filename, "/../") != NULL) && |
| 2289 | (Ustrcmp(filename, "/dev/null") != 0 || real_uid != root_uid)) |
| 2290 | { |
| 2291 | fprintf(stderr, "-C Permission denied\n"); |
| 2292 | exit(EXIT_FAILURE); |
| 2293 | } |
| 2294 | } |
| 2295 | #endif |
| 2296 | if (real_uid != root_uid) |
| 2297 | { |
| 2298 | #ifdef TRUSTED_CONFIG_LIST |
| 2299 | |
| 2300 | if (real_uid != exim_uid |
| 2301 | #ifdef CONFIGURE_OWNER |
| 2302 | && real_uid != config_uid |
| 2303 | #endif |
| 2304 | ) |
| 2305 | trusted_config = FALSE; |
| 2306 | else |
| 2307 | { |
| 2308 | FILE *trust_list = Ufopen(TRUSTED_CONFIG_LIST, "rb"); |
| 2309 | if (trust_list) |
| 2310 | { |
| 2311 | struct stat statbuf; |
| 2312 | |
| 2313 | if (fstat(fileno(trust_list), &statbuf) != 0 || |
| 2314 | (statbuf.st_uid != root_uid /* owner not root */ |
| 2315 | #ifdef CONFIGURE_OWNER |
| 2316 | && statbuf.st_uid != config_uid /* owner not the special one */ |
| 2317 | #endif |
| 2318 | ) || /* or */ |
| 2319 | (statbuf.st_gid != root_gid /* group not root */ |
| 2320 | #ifdef CONFIGURE_GROUP |
| 2321 | && statbuf.st_gid != config_gid /* group not the special one */ |
| 2322 | #endif |
| 2323 | && (statbuf.st_mode & 020) != 0 /* group writeable */ |
| 2324 | ) || /* or */ |
| 2325 | (statbuf.st_mode & 2) != 0) /* world writeable */ |
| 2326 | { |
| 2327 | trusted_config = FALSE; |
| 2328 | fclose(trust_list); |
| 2329 | } |
| 2330 | else |
| 2331 | { |
| 2332 | /* Well, the trust list at least is up to scratch... */ |
| 2333 | void *reset_point = store_get(0); |
| 2334 | uschar *trusted_configs[32]; |
| 2335 | int nr_configs = 0; |
| 2336 | int i = 0; |
| 2337 | |
| 2338 | while (Ufgets(big_buffer, big_buffer_size, trust_list)) |
| 2339 | { |
| 2340 | uschar *start = big_buffer, *nl; |
| 2341 | while (*start && isspace(*start)) |
| 2342 | start++; |
| 2343 | if (*start != '/') |
| 2344 | continue; |
| 2345 | nl = Ustrchr(start, '\n'); |
| 2346 | if (nl) |
| 2347 | *nl = 0; |
| 2348 | trusted_configs[nr_configs++] = string_copy(start); |
| 2349 | if (nr_configs == 32) |
| 2350 | break; |
| 2351 | } |
| 2352 | fclose(trust_list); |
| 2353 | |
| 2354 | if (nr_configs) |
| 2355 | { |
| 2356 | int sep = 0; |
| 2357 | const uschar *list = argrest; |
| 2358 | uschar *filename; |
| 2359 | while (trusted_config && (filename = string_nextinlist(&list, |
| 2360 | &sep, big_buffer, big_buffer_size)) != NULL) |
| 2361 | { |
| 2362 | for (i=0; i < nr_configs; i++) |
| 2363 | { |
| 2364 | if (Ustrcmp(filename, trusted_configs[i]) == 0) |
| 2365 | break; |
| 2366 | } |
| 2367 | if (i == nr_configs) |
| 2368 | { |
| 2369 | trusted_config = FALSE; |
| 2370 | break; |
| 2371 | } |
| 2372 | } |
| 2373 | store_reset(reset_point); |
| 2374 | } |
| 2375 | else |
| 2376 | { |
| 2377 | /* No valid prefixes found in trust_list file. */ |
| 2378 | trusted_config = FALSE; |
| 2379 | } |
| 2380 | } |
| 2381 | } |
| 2382 | else |
| 2383 | { |
| 2384 | /* Could not open trust_list file. */ |
| 2385 | trusted_config = FALSE; |
| 2386 | } |
| 2387 | } |
| 2388 | #else |
| 2389 | /* Not root; don't trust config */ |
| 2390 | trusted_config = FALSE; |
| 2391 | #endif |
| 2392 | } |
| 2393 | |
| 2394 | config_main_filelist = argrest; |
| 2395 | config_changed = TRUE; |
| 2396 | } |
| 2397 | break; |
| 2398 | |
| 2399 | |
| 2400 | /* -D: set up a macro definition */ |
| 2401 | |
| 2402 | case 'D': |
| 2403 | #ifdef DISABLE_D_OPTION |
| 2404 | fprintf(stderr, "exim: -D is not available in this Exim binary\n"); |
| 2405 | exit(EXIT_FAILURE); |
| 2406 | #else |
| 2407 | { |
| 2408 | int ptr = 0; |
| 2409 | macro_item *mlast = NULL; |
| 2410 | macro_item *m; |
| 2411 | uschar name[24]; |
| 2412 | uschar *s = argrest; |
| 2413 | |
| 2414 | while (isspace(*s)) s++; |
| 2415 | |
| 2416 | if (*s < 'A' || *s > 'Z') |
| 2417 | { |
| 2418 | fprintf(stderr, "exim: macro name set by -D must start with " |
| 2419 | "an upper case letter\n"); |
| 2420 | exit(EXIT_FAILURE); |
| 2421 | } |
| 2422 | |
| 2423 | while (isalnum(*s) || *s == '_') |
| 2424 | { |
| 2425 | if (ptr < sizeof(name)-1) name[ptr++] = *s; |
| 2426 | s++; |
| 2427 | } |
| 2428 | name[ptr] = 0; |
| 2429 | if (ptr == 0) { badarg = TRUE; break; } |
| 2430 | while (isspace(*s)) s++; |
| 2431 | if (*s != 0) |
| 2432 | { |
| 2433 | if (*s++ != '=') { badarg = TRUE; break; } |
| 2434 | while (isspace(*s)) s++; |
| 2435 | } |
| 2436 | |
| 2437 | for (m = macros; m != NULL; m = m->next) |
| 2438 | { |
| 2439 | if (Ustrcmp(m->name, name) == 0) |
| 2440 | { |
| 2441 | fprintf(stderr, "exim: duplicated -D in command line\n"); |
| 2442 | exit(EXIT_FAILURE); |
| 2443 | } |
| 2444 | mlast = m; |
| 2445 | } |
| 2446 | |
| 2447 | m = store_get(sizeof(macro_item) + Ustrlen(name)); |
| 2448 | m->next = NULL; |
| 2449 | m->command_line = TRUE; |
| 2450 | if (mlast == NULL) macros = m; else mlast->next = m; |
| 2451 | Ustrcpy(m->name, name); |
| 2452 | m->replacement = string_copy(s); |
| 2453 | |
| 2454 | if (clmacro_count >= MAX_CLMACROS) |
| 2455 | { |
| 2456 | fprintf(stderr, "exim: too many -D options on command line\n"); |
| 2457 | exit(EXIT_FAILURE); |
| 2458 | } |
| 2459 | clmacros[clmacro_count++] = string_sprintf("-D%s=%s", m->name, |
| 2460 | m->replacement); |
| 2461 | } |
| 2462 | #endif |
| 2463 | break; |
| 2464 | |
| 2465 | /* -d: Set debug level (see also -v below) or set the drop_cr option. |
| 2466 | The latter is now a no-op, retained for compatibility only. If -dd is used, |
| 2467 | debugging subprocesses of the daemon is disabled. */ |
| 2468 | |
| 2469 | case 'd': |
| 2470 | if (Ustrcmp(argrest, "ropcr") == 0) |
| 2471 | { |
| 2472 | /* drop_cr = TRUE; */ |
| 2473 | } |
| 2474 | |
| 2475 | /* Use an intermediate variable so that we don't set debugging while |
| 2476 | decoding the debugging bits. */ |
| 2477 | |
| 2478 | else |
| 2479 | { |
| 2480 | unsigned int selector = D_default; |
| 2481 | debug_selector = 0; |
| 2482 | debug_file = NULL; |
| 2483 | if (*argrest == 'd') |
| 2484 | { |
| 2485 | debug_daemon = TRUE; |
| 2486 | argrest++; |
| 2487 | } |
| 2488 | if (*argrest != 0) |
| 2489 | decode_bits(&selector, 1, debug_notall, argrest, |
| 2490 | debug_options, debug_options_count, US"debug", 0); |
| 2491 | debug_selector = selector; |
| 2492 | } |
| 2493 | break; |
| 2494 | |
| 2495 | |
| 2496 | /* -E: This is a local error message. This option is not intended for |
| 2497 | external use at all, but is not restricted to trusted callers because it |
| 2498 | does no harm (just suppresses certain error messages) and if Exim is run |
| 2499 | not setuid root it won't always be trusted when it generates error |
| 2500 | messages using this option. If there is a message id following -E, point |
| 2501 | message_reference at it, for logging. */ |
| 2502 | |
| 2503 | case 'E': |
| 2504 | local_error_message = TRUE; |
| 2505 | if (mac_ismsgid(argrest)) message_reference = argrest; |
| 2506 | break; |
| 2507 | |
| 2508 | |
| 2509 | /* -ex: The vacation program calls sendmail with the undocumented "-eq" |
| 2510 | option, so it looks as if historically the -oex options are also callable |
| 2511 | without the leading -o. So we have to accept them. Before the switch, |
| 2512 | anything starting -oe has been converted to -e. Exim does not support all |
| 2513 | of the sendmail error options. */ |
| 2514 | |
| 2515 | case 'e': |
| 2516 | if (Ustrcmp(argrest, "e") == 0) |
| 2517 | { |
| 2518 | arg_error_handling = ERRORS_SENDER; |
| 2519 | errors_sender_rc = EXIT_SUCCESS; |
| 2520 | } |
| 2521 | else if (Ustrcmp(argrest, "m") == 0) arg_error_handling = ERRORS_SENDER; |
| 2522 | else if (Ustrcmp(argrest, "p") == 0) arg_error_handling = ERRORS_STDERR; |
| 2523 | else if (Ustrcmp(argrest, "q") == 0) arg_error_handling = ERRORS_STDERR; |
| 2524 | else if (Ustrcmp(argrest, "w") == 0) arg_error_handling = ERRORS_SENDER; |
| 2525 | else badarg = TRUE; |
| 2526 | break; |
| 2527 | |
| 2528 | |
| 2529 | /* -F: Set sender's full name, used instead of the gecos entry from |
| 2530 | the password file. Since users can usually alter their gecos entries, |
| 2531 | there's no security involved in using this instead. The data can follow |
| 2532 | the -F or be in the next argument. */ |
| 2533 | |
| 2534 | case 'F': |
| 2535 | if (*argrest == 0) |
| 2536 | { |
| 2537 | if(++i < argc) argrest = argv[i]; else |
| 2538 | { badarg = TRUE; break; } |
| 2539 | } |
| 2540 | originator_name = argrest; |
| 2541 | sender_name_forced = TRUE; |
| 2542 | break; |
| 2543 | |
| 2544 | |
| 2545 | /* -f: Set sender's address - this value is only actually used if Exim is |
| 2546 | run by a trusted user, or if untrusted_set_sender is set and matches the |
| 2547 | address, except that the null address can always be set by any user. The |
| 2548 | test for this happens later, when the value given here is ignored when not |
| 2549 | permitted. For an untrusted user, the actual sender is still put in Sender: |
| 2550 | if it doesn't match the From: header (unless no_local_from_check is set). |
| 2551 | The data can follow the -f or be in the next argument. The -r switch is an |
| 2552 | obsolete form of -f but since there appear to be programs out there that |
| 2553 | use anything that sendmail has ever supported, better accept it - the |
| 2554 | synonymizing is done before the switch above. |
| 2555 | |
| 2556 | At this stage, we must allow domain literal addresses, because we don't |
| 2557 | know what the setting of allow_domain_literals is yet. Ditto for trailing |
| 2558 | dots and strip_trailing_dot. */ |
| 2559 | |
| 2560 | case 'f': |
| 2561 | { |
| 2562 | int dummy_start, dummy_end; |
| 2563 | uschar *errmess; |
| 2564 | if (*argrest == 0) |
| 2565 | { |
| 2566 | if (i+1 < argc) argrest = argv[++i]; else |
| 2567 | { badarg = TRUE; break; } |
| 2568 | } |
| 2569 | if (*argrest == 0) |
| 2570 | sender_address = string_sprintf(""); /* Ensure writeable memory */ |
| 2571 | else |
| 2572 | { |
| 2573 | uschar *temp = argrest + Ustrlen(argrest) - 1; |
| 2574 | while (temp >= argrest && isspace(*temp)) temp--; |
| 2575 | if (temp >= argrest && *temp == '.') f_end_dot = TRUE; |
| 2576 | allow_domain_literals = TRUE; |
| 2577 | strip_trailing_dot = TRUE; |
| 2578 | #ifdef SUPPORT_I18N |
| 2579 | allow_utf8_domains = TRUE; |
| 2580 | #endif |
| 2581 | sender_address = parse_extract_address(argrest, &errmess, |
| 2582 | &dummy_start, &dummy_end, &sender_address_domain, TRUE); |
| 2583 | #ifdef SUPPORT_I18N |
| 2584 | message_smtputf8 = string_is_utf8(sender_address); |
| 2585 | allow_utf8_domains = FALSE; |
| 2586 | #endif |
| 2587 | allow_domain_literals = FALSE; |
| 2588 | strip_trailing_dot = FALSE; |
| 2589 | if (sender_address == NULL) |
| 2590 | { |
| 2591 | fprintf(stderr, "exim: bad -f address \"%s\": %s\n", argrest, errmess); |
| 2592 | return EXIT_FAILURE; |
| 2593 | } |
| 2594 | } |
| 2595 | sender_address_forced = TRUE; |
| 2596 | } |
| 2597 | break; |
| 2598 | |
| 2599 | /* -G: sendmail invocation to specify that it's a gateway submission and |
| 2600 | sendmail may complain about problems instead of fixing them. |
| 2601 | We make it equivalent to an ACL "control = suppress_local_fixups" and do |
| 2602 | not at this time complain about problems. */ |
| 2603 | |
| 2604 | case 'G': |
| 2605 | flag_G = TRUE; |
| 2606 | break; |
| 2607 | |
| 2608 | /* -h: Set the hop count for an incoming message. Exim does not currently |
| 2609 | support this; it always computes it by counting the Received: headers. |
| 2610 | To put it in will require a change to the spool header file format. */ |
| 2611 | |
| 2612 | case 'h': |
| 2613 | if (*argrest == 0) |
| 2614 | { |
| 2615 | if(++i < argc) argrest = argv[i]; else |
| 2616 | { badarg = TRUE; break; } |
| 2617 | } |
| 2618 | if (!isdigit(*argrest)) badarg = TRUE; |
| 2619 | break; |
| 2620 | |
| 2621 | |
| 2622 | /* -i: Set flag so dot doesn't end non-SMTP input (same as -oi, seems |
| 2623 | not to be documented for sendmail but mailx (at least) uses it) */ |
| 2624 | |
| 2625 | case 'i': |
| 2626 | if (*argrest == 0) dot_ends = FALSE; else badarg = TRUE; |
| 2627 | break; |
| 2628 | |
| 2629 | |
| 2630 | /* -L: set the identifier used for syslog; equivalent to setting |
| 2631 | syslog_processname in the config file, but needs to be an admin option. */ |
| 2632 | |
| 2633 | case 'L': |
| 2634 | if (*argrest == '\0') |
| 2635 | { |
| 2636 | if(++i < argc) argrest = argv[i]; else |
| 2637 | { badarg = TRUE; break; } |
| 2638 | } |
| 2639 | sz = Ustrlen(argrest); |
| 2640 | if (sz > 32) |
| 2641 | { |
| 2642 | fprintf(stderr, "exim: the -L syslog name is too long: \"%s\"\n", argrest); |
| 2643 | return EXIT_FAILURE; |
| 2644 | } |
| 2645 | if (sz < 1) |
| 2646 | { |
| 2647 | fprintf(stderr, "exim: the -L syslog name is too short\n"); |
| 2648 | return EXIT_FAILURE; |
| 2649 | } |
| 2650 | cmdline_syslog_name = argrest; |
| 2651 | break; |
| 2652 | |
| 2653 | case 'M': |
| 2654 | receiving_message = FALSE; |
| 2655 | |
| 2656 | /* -MC: continue delivery of another message via an existing open |
| 2657 | file descriptor. This option is used for an internal call by the |
| 2658 | smtp transport when there is a pending message waiting to go to an |
| 2659 | address to which it has got a connection. Five subsequent arguments are |
| 2660 | required: transport name, host name, IP address, sequence number, and |
| 2661 | message_id. Transports may decline to create new processes if the sequence |
| 2662 | number gets too big. The channel is stdin. This (-MC) must be the last |
| 2663 | argument. There's a subsequent check that the real-uid is privileged. |
| 2664 | |
| 2665 | If we are running in the test harness. delay for a bit, to let the process |
| 2666 | that set this one up complete. This makes for repeatability of the logging, |
| 2667 | etc. output. */ |
| 2668 | |
| 2669 | if (Ustrcmp(argrest, "C") == 0) |
| 2670 | { |
| 2671 | union sockaddr_46 interface_sock; |
| 2672 | EXIM_SOCKLEN_T size = sizeof(interface_sock); |
| 2673 | |
| 2674 | if (argc != i + 6) |
| 2675 | { |
| 2676 | fprintf(stderr, "exim: too many or too few arguments after -MC\n"); |
| 2677 | return EXIT_FAILURE; |
| 2678 | } |
| 2679 | |
| 2680 | if (msg_action_arg >= 0) |
| 2681 | { |
| 2682 | fprintf(stderr, "exim: incompatible arguments\n"); |
| 2683 | return EXIT_FAILURE; |
| 2684 | } |
| 2685 | |
| 2686 | continue_transport = argv[++i]; |
| 2687 | continue_hostname = argv[++i]; |
| 2688 | continue_host_address = argv[++i]; |
| 2689 | continue_sequence = Uatoi(argv[++i]); |
| 2690 | msg_action = MSG_DELIVER; |
| 2691 | msg_action_arg = ++i; |
| 2692 | forced_delivery = TRUE; |
| 2693 | queue_run_pid = passed_qr_pid; |
| 2694 | queue_run_pipe = passed_qr_pipe; |
| 2695 | |
| 2696 | if (!mac_ismsgid(argv[i])) |
| 2697 | { |
| 2698 | fprintf(stderr, "exim: malformed message id %s after -MC option\n", |
| 2699 | argv[i]); |
| 2700 | return EXIT_FAILURE; |
| 2701 | } |
| 2702 | |
| 2703 | /* Set up $sending_ip_address and $sending_port */ |
| 2704 | |
| 2705 | if (getsockname(fileno(stdin), (struct sockaddr *)(&interface_sock), |
| 2706 | &size) == 0) |
| 2707 | sending_ip_address = host_ntoa(-1, &interface_sock, NULL, |
| 2708 | &sending_port); |
| 2709 | else |
| 2710 | { |
| 2711 | fprintf(stderr, "exim: getsockname() failed after -MC option: %s\n", |
| 2712 | strerror(errno)); |
| 2713 | return EXIT_FAILURE; |
| 2714 | } |
| 2715 | |
| 2716 | if (running_in_test_harness) millisleep(500); |
| 2717 | break; |
| 2718 | } |
| 2719 | |
| 2720 | else if (*argrest == 'C' && argrest[1] && !argrest[2]) |
| 2721 | { |
| 2722 | switch(argrest[1]) |
| 2723 | { |
| 2724 | /* -MCA: set the smtp_authenticated flag; this is useful only when it |
| 2725 | precedes -MC (see above). The flag indicates that the host to which |
| 2726 | Exim is connected has accepted an AUTH sequence. */ |
| 2727 | |
| 2728 | case 'A': smtp_authenticated = TRUE; break; |
| 2729 | |
| 2730 | /* -MCD: set the smtp_use_dsn flag; this indicates that the host |
| 2731 | that exim is connected to supports the esmtp extension DSN */ |
| 2732 | |
| 2733 | case 'D': smtp_peer_options |= PEER_OFFERED_DSN; break; |
| 2734 | |
| 2735 | /* -MCG: set the queue name, to a non-default value */ |
| 2736 | |
| 2737 | case 'G': if (++i < argc) queue_name = string_copy(argv[i]); |
| 2738 | else badarg = TRUE; |
| 2739 | break; |
| 2740 | |
| 2741 | /* -MCK: the peer offered CHUNKING. Must precede -MC */ |
| 2742 | |
| 2743 | case 'K': smtp_peer_options |= PEER_OFFERED_CHUNKING; break; |
| 2744 | |
| 2745 | /* -MCP: set the smtp_use_pipelining flag; this is useful only when |
| 2746 | it preceded -MC (see above) */ |
| 2747 | |
| 2748 | case 'P': smtp_peer_options |= PEER_OFFERED_PIPE; break; |
| 2749 | |
| 2750 | /* -MCQ: pass on the pid of the queue-running process that started |
| 2751 | this chain of deliveries and the fd of its synchronizing pipe; this |
| 2752 | is useful only when it precedes -MC (see above) */ |
| 2753 | |
| 2754 | case 'Q': if (++i < argc) passed_qr_pid = (pid_t)(Uatol(argv[i])); |
| 2755 | else badarg = TRUE; |
| 2756 | if (++i < argc) passed_qr_pipe = (int)(Uatol(argv[i])); |
| 2757 | else badarg = TRUE; |
| 2758 | break; |
| 2759 | |
| 2760 | /* -MCS: set the smtp_use_size flag; this is useful only when it |
| 2761 | precedes -MC (see above) */ |
| 2762 | |
| 2763 | case 'S': smtp_peer_options |= PEER_OFFERED_SIZE; break; |
| 2764 | |
| 2765 | #ifdef SUPPORT_TLS |
| 2766 | /* -MCT: set the tls_offered flag; this is useful only when it |
| 2767 | precedes -MC (see above). The flag indicates that the host to which |
| 2768 | Exim is connected has offered TLS support. */ |
| 2769 | |
| 2770 | case 'T': smtp_peer_options |= PEER_OFFERED_TLS; break; |
| 2771 | #endif |
| 2772 | |
| 2773 | default: badarg = TRUE; break; |
| 2774 | } |
| 2775 | break; |
| 2776 | } |
| 2777 | |
| 2778 | /* -M[x]: various operations on the following list of message ids: |
| 2779 | -M deliver the messages, ignoring next retry times and thawing |
| 2780 | -Mc deliver the messages, checking next retry times, no thawing |
| 2781 | -Mf freeze the messages |
| 2782 | -Mg give up on the messages |
| 2783 | -Mt thaw the messages |
| 2784 | -Mrm remove the messages |
| 2785 | In the above cases, this must be the last option. There are also the |
| 2786 | following options which are followed by a single message id, and which |
| 2787 | act on that message. Some of them use the "recipient" addresses as well. |
| 2788 | -Mar add recipient(s) |
| 2789 | -Mmad mark all recipients delivered |
| 2790 | -Mmd mark recipients(s) delivered |
| 2791 | -Mes edit sender |
| 2792 | -Mset load a message for use with -be |
| 2793 | -Mvb show body |
| 2794 | -Mvc show copy (of whole message, in RFC 2822 format) |
| 2795 | -Mvh show header |
| 2796 | -Mvl show log |
| 2797 | */ |
| 2798 | |
| 2799 | else if (*argrest == 0) |
| 2800 | { |
| 2801 | msg_action = MSG_DELIVER; |
| 2802 | forced_delivery = deliver_force_thaw = TRUE; |
| 2803 | } |
| 2804 | else if (Ustrcmp(argrest, "ar") == 0) |
| 2805 | { |
| 2806 | msg_action = MSG_ADD_RECIPIENT; |
| 2807 | one_msg_action = TRUE; |
| 2808 | } |
| 2809 | else if (Ustrcmp(argrest, "c") == 0) msg_action = MSG_DELIVER; |
| 2810 | else if (Ustrcmp(argrest, "es") == 0) |
| 2811 | { |
| 2812 | msg_action = MSG_EDIT_SENDER; |
| 2813 | one_msg_action = TRUE; |
| 2814 | } |
| 2815 | else if (Ustrcmp(argrest, "f") == 0) msg_action = MSG_FREEZE; |
| 2816 | else if (Ustrcmp(argrest, "g") == 0) |
| 2817 | { |
| 2818 | msg_action = MSG_DELIVER; |
| 2819 | deliver_give_up = TRUE; |
| 2820 | } |
| 2821 | else if (Ustrcmp(argrest, "mad") == 0) |
| 2822 | { |
| 2823 | msg_action = MSG_MARK_ALL_DELIVERED; |
| 2824 | } |
| 2825 | else if (Ustrcmp(argrest, "md") == 0) |
| 2826 | { |
| 2827 | msg_action = MSG_MARK_DELIVERED; |
| 2828 | one_msg_action = TRUE; |
| 2829 | } |
| 2830 | else if (Ustrcmp(argrest, "rm") == 0) msg_action = MSG_REMOVE; |
| 2831 | else if (Ustrcmp(argrest, "set") == 0) |
| 2832 | { |
| 2833 | msg_action = MSG_LOAD; |
| 2834 | one_msg_action = TRUE; |
| 2835 | } |
| 2836 | else if (Ustrcmp(argrest, "t") == 0) msg_action = MSG_THAW; |
| 2837 | else if (Ustrcmp(argrest, "vb") == 0) |
| 2838 | { |
| 2839 | msg_action = MSG_SHOW_BODY; |
| 2840 | one_msg_action = TRUE; |
| 2841 | } |
| 2842 | else if (Ustrcmp(argrest, "vc") == 0) |
| 2843 | { |
| 2844 | msg_action = MSG_SHOW_COPY; |
| 2845 | one_msg_action = TRUE; |
| 2846 | } |
| 2847 | else if (Ustrcmp(argrest, "vh") == 0) |
| 2848 | { |
| 2849 | msg_action = MSG_SHOW_HEADER; |
| 2850 | one_msg_action = TRUE; |
| 2851 | } |
| 2852 | else if (Ustrcmp(argrest, "vl") == 0) |
| 2853 | { |
| 2854 | msg_action = MSG_SHOW_LOG; |
| 2855 | one_msg_action = TRUE; |
| 2856 | } |
| 2857 | else { badarg = TRUE; break; } |
| 2858 | |
| 2859 | /* All the -Mxx options require at least one message id. */ |
| 2860 | |
| 2861 | msg_action_arg = i + 1; |
| 2862 | if (msg_action_arg >= argc) |
| 2863 | { |
| 2864 | fprintf(stderr, "exim: no message ids given after %s option\n", arg); |
| 2865 | return EXIT_FAILURE; |
| 2866 | } |
| 2867 | |
| 2868 | /* Some require only message ids to follow */ |
| 2869 | |
| 2870 | if (!one_msg_action) |
| 2871 | { |
| 2872 | int j; |
| 2873 | for (j = msg_action_arg; j < argc; j++) if (!mac_ismsgid(argv[j])) |
| 2874 | { |
| 2875 | fprintf(stderr, "exim: malformed message id %s after %s option\n", |
| 2876 | argv[j], arg); |
| 2877 | return EXIT_FAILURE; |
| 2878 | } |
| 2879 | goto END_ARG; /* Remaining args are ids */ |
| 2880 | } |
| 2881 | |
| 2882 | /* Others require only one message id, possibly followed by addresses, |
| 2883 | which will be handled as normal arguments. */ |
| 2884 | |
| 2885 | else |
| 2886 | { |
| 2887 | if (!mac_ismsgid(argv[msg_action_arg])) |
| 2888 | { |
| 2889 | fprintf(stderr, "exim: malformed message id %s after %s option\n", |
| 2890 | argv[msg_action_arg], arg); |
| 2891 | return EXIT_FAILURE; |
| 2892 | } |
| 2893 | i++; |
| 2894 | } |
| 2895 | break; |
| 2896 | |
| 2897 | |
| 2898 | /* Some programs seem to call the -om option without the leading o; |
| 2899 | for sendmail it askes for "me too". Exim always does this. */ |
| 2900 | |
| 2901 | case 'm': |
| 2902 | if (*argrest != 0) badarg = TRUE; |
| 2903 | break; |
| 2904 | |
| 2905 | |
| 2906 | /* -N: don't do delivery - a debugging option that stops transports doing |
| 2907 | their thing. It implies debugging at the D_v level. */ |
| 2908 | |
| 2909 | case 'N': |
| 2910 | if (*argrest == 0) |
| 2911 | { |
| 2912 | dont_deliver = TRUE; |
| 2913 | debug_selector |= D_v; |
| 2914 | debug_file = stderr; |
| 2915 | } |
| 2916 | else badarg = TRUE; |
| 2917 | break; |
| 2918 | |
| 2919 | |
| 2920 | /* -n: This means "don't alias" in sendmail, apparently. |
| 2921 | For normal invocations, it has no effect. |
| 2922 | It may affect some other options. */ |
| 2923 | |
| 2924 | case 'n': |
| 2925 | flag_n = TRUE; |
| 2926 | break; |
| 2927 | |
| 2928 | /* -O: Just ignore it. In sendmail, apparently -O option=value means set |
| 2929 | option to the specified value. This form uses long names. We need to handle |
| 2930 | -O option=value and -Ooption=value. */ |
| 2931 | |
| 2932 | case 'O': |
| 2933 | if (*argrest == 0) |
| 2934 | { |
| 2935 | if (++i >= argc) |
| 2936 | { |
| 2937 | fprintf(stderr, "exim: string expected after -O\n"); |
| 2938 | exit(EXIT_FAILURE); |
| 2939 | } |
| 2940 | } |
| 2941 | break; |
| 2942 | |
| 2943 | case 'o': |
| 2944 | |
| 2945 | /* -oA: Set an argument for the bi command (sendmail's "alternate alias |
| 2946 | file" option). */ |
| 2947 | |
| 2948 | if (*argrest == 'A') |
| 2949 | { |
| 2950 | alias_arg = argrest + 1; |
| 2951 | if (alias_arg[0] == 0) |
| 2952 | { |
| 2953 | if (i+1 < argc) alias_arg = argv[++i]; else |
| 2954 | { |
| 2955 | fprintf(stderr, "exim: string expected after -oA\n"); |
| 2956 | exit(EXIT_FAILURE); |
| 2957 | } |
| 2958 | } |
| 2959 | } |
| 2960 | |
| 2961 | /* -oB: Set a connection message max value for remote deliveries */ |
| 2962 | |
| 2963 | else if (*argrest == 'B') |
| 2964 | { |
| 2965 | uschar *p = argrest + 1; |
| 2966 | if (p[0] == 0) |
| 2967 | { |
| 2968 | if (i+1 < argc && isdigit((argv[i+1][0]))) p = argv[++i]; else |
| 2969 | { |
| 2970 | connection_max_messages = 1; |
| 2971 | p = NULL; |
| 2972 | } |
| 2973 | } |
| 2974 | |
| 2975 | if (p != NULL) |
| 2976 | { |
| 2977 | if (!isdigit(*p)) |
| 2978 | { |
| 2979 | fprintf(stderr, "exim: number expected after -oB\n"); |
| 2980 | exit(EXIT_FAILURE); |
| 2981 | } |
| 2982 | connection_max_messages = Uatoi(p); |
| 2983 | } |
| 2984 | } |
| 2985 | |
| 2986 | /* -odb: background delivery */ |
| 2987 | |
| 2988 | else if (Ustrcmp(argrest, "db") == 0) |
| 2989 | { |
| 2990 | synchronous_delivery = FALSE; |
| 2991 | arg_queue_only = FALSE; |
| 2992 | queue_only_set = TRUE; |
| 2993 | } |
| 2994 | |
| 2995 | /* -odf: foreground delivery (smail-compatible option); same effect as |
| 2996 | -odi: interactive (synchronous) delivery (sendmail-compatible option) |
| 2997 | */ |
| 2998 | |
| 2999 | else if (Ustrcmp(argrest, "df") == 0 || Ustrcmp(argrest, "di") == 0) |
| 3000 | { |
| 3001 | synchronous_delivery = TRUE; |
| 3002 | arg_queue_only = FALSE; |
| 3003 | queue_only_set = TRUE; |
| 3004 | } |
| 3005 | |
| 3006 | /* -odq: queue only */ |
| 3007 | |
| 3008 | else if (Ustrcmp(argrest, "dq") == 0) |
| 3009 | { |
| 3010 | synchronous_delivery = FALSE; |
| 3011 | arg_queue_only = TRUE; |
| 3012 | queue_only_set = TRUE; |
| 3013 | } |
| 3014 | |
| 3015 | /* -odqs: queue SMTP only - do local deliveries and remote routing, |
| 3016 | but no remote delivery */ |
| 3017 | |
| 3018 | else if (Ustrcmp(argrest, "dqs") == 0) |
| 3019 | { |
| 3020 | queue_smtp = TRUE; |
| 3021 | arg_queue_only = FALSE; |
| 3022 | queue_only_set = TRUE; |
| 3023 | } |
| 3024 | |
| 3025 | /* -oex: Sendmail error flags. As these are also accepted without the |
| 3026 | leading -o prefix, for compatibility with vacation and other callers, |
| 3027 | they are handled with -e above. */ |
| 3028 | |
| 3029 | /* -oi: Set flag so dot doesn't end non-SMTP input (same as -i) |
| 3030 | -oitrue: Another sendmail syntax for the same */ |
| 3031 | |
| 3032 | else if (Ustrcmp(argrest, "i") == 0 || |
| 3033 | Ustrcmp(argrest, "itrue") == 0) |
| 3034 | dot_ends = FALSE; |
| 3035 | |
| 3036 | /* -oM*: Set various characteristics for an incoming message; actually |
| 3037 | acted on for trusted callers only. */ |
| 3038 | |
| 3039 | else if (*argrest == 'M') |
| 3040 | { |
| 3041 | if (i+1 >= argc) |
| 3042 | { |
| 3043 | fprintf(stderr, "exim: data expected after -o%s\n", argrest); |
| 3044 | exit(EXIT_FAILURE); |
| 3045 | } |
| 3046 | |
| 3047 | /* -oMa: Set sender host address */ |
| 3048 | |
| 3049 | if (Ustrcmp(argrest, "Ma") == 0) sender_host_address = argv[++i]; |
| 3050 | |
| 3051 | /* -oMaa: Set authenticator name */ |
| 3052 | |
| 3053 | else if (Ustrcmp(argrest, "Maa") == 0) |
| 3054 | sender_host_authenticated = argv[++i]; |
| 3055 | |
| 3056 | /* -oMas: setting authenticated sender */ |
| 3057 | |
| 3058 | else if (Ustrcmp(argrest, "Mas") == 0) authenticated_sender = argv[++i]; |
| 3059 | |
| 3060 | /* -oMai: setting authenticated id */ |
| 3061 | |
| 3062 | else if (Ustrcmp(argrest, "Mai") == 0) authenticated_id = argv[++i]; |
| 3063 | |
| 3064 | /* -oMi: Set incoming interface address */ |
| 3065 | |
| 3066 | else if (Ustrcmp(argrest, "Mi") == 0) interface_address = argv[++i]; |
| 3067 | |
| 3068 | /* -oMm: Message reference */ |
| 3069 | |
| 3070 | else if (Ustrcmp(argrest, "Mm") == 0) |
| 3071 | { |
| 3072 | if (!mac_ismsgid(argv[i+1])) |
| 3073 | { |
| 3074 | fprintf(stderr,"-oMm must be a valid message ID\n"); |
| 3075 | exit(EXIT_FAILURE); |
| 3076 | } |
| 3077 | if (!trusted_config) |
| 3078 | { |
| 3079 | fprintf(stderr,"-oMm must be called by a trusted user/config\n"); |
| 3080 | exit(EXIT_FAILURE); |
| 3081 | } |
| 3082 | message_reference = argv[++i]; |
| 3083 | } |
| 3084 | |
| 3085 | /* -oMr: Received protocol */ |
| 3086 | |
| 3087 | else if (Ustrcmp(argrest, "Mr") == 0) received_protocol = argv[++i]; |
| 3088 | |
| 3089 | /* -oMs: Set sender host name */ |
| 3090 | |
| 3091 | else if (Ustrcmp(argrest, "Ms") == 0) sender_host_name = argv[++i]; |
| 3092 | |
| 3093 | /* -oMt: Set sender ident */ |
| 3094 | |
| 3095 | else if (Ustrcmp(argrest, "Mt") == 0) |
| 3096 | { |
| 3097 | sender_ident_set = TRUE; |
| 3098 | sender_ident = argv[++i]; |
| 3099 | } |
| 3100 | |
| 3101 | /* Else a bad argument */ |
| 3102 | |
| 3103 | else |
| 3104 | { |
| 3105 | badarg = TRUE; |
| 3106 | break; |
| 3107 | } |
| 3108 | } |
| 3109 | |
| 3110 | /* -om: Me-too flag for aliases. Exim always does this. Some programs |
| 3111 | seem to call this as -m (undocumented), so that is also accepted (see |
| 3112 | above). */ |
| 3113 | |
| 3114 | else if (Ustrcmp(argrest, "m") == 0) {} |
| 3115 | |
| 3116 | /* -oo: An ancient flag for old-style addresses which still seems to |
| 3117 | crop up in some calls (see in SCO). */ |
| 3118 | |
| 3119 | else if (Ustrcmp(argrest, "o") == 0) {} |
| 3120 | |
| 3121 | /* -oP <name>: set pid file path for daemon */ |
| 3122 | |
| 3123 | else if (Ustrcmp(argrest, "P") == 0) |
| 3124 | override_pid_file_path = argv[++i]; |
| 3125 | |
| 3126 | /* -or <n>: set timeout for non-SMTP acceptance |
| 3127 | -os <n>: set timeout for SMTP acceptance */ |
| 3128 | |
| 3129 | else if (*argrest == 'r' || *argrest == 's') |
| 3130 | { |
| 3131 | int *tp = (*argrest == 'r')? |
| 3132 | &arg_receive_timeout : &arg_smtp_receive_timeout; |
| 3133 | if (argrest[1] == 0) |
| 3134 | { |
| 3135 | if (i+1 < argc) *tp= readconf_readtime(argv[++i], 0, FALSE); |
| 3136 | } |
| 3137 | else *tp = readconf_readtime(argrest + 1, 0, FALSE); |
| 3138 | if (*tp < 0) |
| 3139 | { |
| 3140 | fprintf(stderr, "exim: bad time value %s: abandoned\n", argv[i]); |
| 3141 | exit(EXIT_FAILURE); |
| 3142 | } |
| 3143 | } |
| 3144 | |
| 3145 | /* -oX <list>: Override local_interfaces and/or default daemon ports */ |
| 3146 | |
| 3147 | else if (Ustrcmp(argrest, "X") == 0) |
| 3148 | override_local_interfaces = argv[++i]; |
| 3149 | |
| 3150 | /* Unknown -o argument */ |
| 3151 | |
| 3152 | else badarg = TRUE; |
| 3153 | break; |
| 3154 | |
| 3155 | |
| 3156 | /* -ps: force Perl startup; -pd force delayed Perl startup */ |
| 3157 | |
| 3158 | case 'p': |
| 3159 | #ifdef EXIM_PERL |
| 3160 | if (*argrest == 's' && argrest[1] == 0) |
| 3161 | { |
| 3162 | perl_start_option = 1; |
| 3163 | break; |
| 3164 | } |
| 3165 | if (*argrest == 'd' && argrest[1] == 0) |
| 3166 | { |
| 3167 | perl_start_option = -1; |
| 3168 | break; |
| 3169 | } |
| 3170 | #endif |
| 3171 | |
| 3172 | /* -panythingelse is taken as the Sendmail-compatible argument -prval:sval, |
| 3173 | which sets the host protocol and host name */ |
| 3174 | |
| 3175 | if (*argrest == 0) |
| 3176 | { |
| 3177 | if (i+1 < argc) argrest = argv[++i]; else |
| 3178 | { badarg = TRUE; break; } |
| 3179 | } |
| 3180 | |
| 3181 | if (*argrest != 0) |
| 3182 | { |
| 3183 | uschar *hn = Ustrchr(argrest, ':'); |
| 3184 | if (hn == NULL) |
| 3185 | { |
| 3186 | received_protocol = argrest; |
| 3187 | } |
| 3188 | else |
| 3189 | { |
| 3190 | received_protocol = string_copyn(argrest, hn - argrest); |
| 3191 | sender_host_name = hn + 1; |
| 3192 | } |
| 3193 | } |
| 3194 | break; |
| 3195 | |
| 3196 | |
| 3197 | case 'q': |
| 3198 | receiving_message = FALSE; |
| 3199 | if (queue_interval >= 0) |
| 3200 | { |
| 3201 | fprintf(stderr, "exim: -q specified more than once\n"); |
| 3202 | exit(EXIT_FAILURE); |
| 3203 | } |
| 3204 | |
| 3205 | /* -qq...: Do queue runs in a 2-stage manner */ |
| 3206 | |
| 3207 | if (*argrest == 'q') |
| 3208 | { |
| 3209 | queue_2stage = TRUE; |
| 3210 | argrest++; |
| 3211 | } |
| 3212 | |
| 3213 | /* -qi...: Do only first (initial) deliveries */ |
| 3214 | |
| 3215 | if (*argrest == 'i') |
| 3216 | { |
| 3217 | queue_run_first_delivery = TRUE; |
| 3218 | argrest++; |
| 3219 | } |
| 3220 | |
| 3221 | /* -qf...: Run the queue, forcing deliveries |
| 3222 | -qff..: Ditto, forcing thawing as well */ |
| 3223 | |
| 3224 | if (*argrest == 'f') |
| 3225 | { |
| 3226 | queue_run_force = TRUE; |
| 3227 | if (*++argrest == 'f') |
| 3228 | { |
| 3229 | deliver_force_thaw = TRUE; |
| 3230 | argrest++; |
| 3231 | } |
| 3232 | } |
| 3233 | |
| 3234 | /* -q[f][f]l...: Run the queue only on local deliveries */ |
| 3235 | |
| 3236 | if (*argrest == 'l') |
| 3237 | { |
| 3238 | queue_run_local = TRUE; |
| 3239 | argrest++; |
| 3240 | } |
| 3241 | |
| 3242 | /* -q[f][f][l][G<name>]... Work on the named queue */ |
| 3243 | |
| 3244 | if (*argrest == 'G') |
| 3245 | { |
| 3246 | int i; |
| 3247 | for (argrest++, i = 0; argrest[i] && argrest[i] != '/'; ) i++; |
| 3248 | queue_name = string_copyn(argrest, i); |
| 3249 | argrest += i; |
| 3250 | if (*argrest == '/') argrest++; |
| 3251 | } |
| 3252 | |
| 3253 | /* -q[f][f][l][G<name>]: Run the queue, optionally forced, optionally local |
| 3254 | only, optionally named, optionally starting from a given message id. */ |
| 3255 | |
| 3256 | if (*argrest == 0 && |
| 3257 | (i + 1 >= argc || argv[i+1][0] == '-' || mac_ismsgid(argv[i+1]))) |
| 3258 | { |
| 3259 | queue_interval = 0; |
| 3260 | if (i+1 < argc && mac_ismsgid(argv[i+1])) |
| 3261 | start_queue_run_id = argv[++i]; |
| 3262 | if (i+1 < argc && mac_ismsgid(argv[i+1])) |
| 3263 | stop_queue_run_id = argv[++i]; |
| 3264 | } |
| 3265 | |
| 3266 | /* -q[f][f][l][G<name>/]<n>: Run the queue at regular intervals, optionally |
| 3267 | forced, optionally local only, optionally named. */ |
| 3268 | |
| 3269 | else if ((queue_interval = readconf_readtime(*argrest ? argrest : argv[++i], |
| 3270 | 0, FALSE)) <= 0) |
| 3271 | { |
| 3272 | fprintf(stderr, "exim: bad time value %s: abandoned\n", argv[i]); |
| 3273 | exit(EXIT_FAILURE); |
| 3274 | } |
| 3275 | break; |
| 3276 | |
| 3277 | |
| 3278 | case 'R': /* Synonymous with -qR... */ |
| 3279 | receiving_message = FALSE; |
| 3280 | |
| 3281 | /* -Rf: As -R (below) but force all deliveries, |
| 3282 | -Rff: Ditto, but also thaw all frozen messages, |
| 3283 | -Rr: String is regex |
| 3284 | -Rrf: Regex and force |
| 3285 | -Rrff: Regex and force and thaw |
| 3286 | |
| 3287 | in all cases provided there are no further characters in this |
| 3288 | argument. */ |
| 3289 | |
| 3290 | if (*argrest != 0) |
| 3291 | { |
| 3292 | int i; |
| 3293 | for (i = 0; i < nelem(rsopts); i++) |
| 3294 | if (Ustrcmp(argrest, rsopts[i]) == 0) |
| 3295 | { |
| 3296 | if (i != 2) queue_run_force = TRUE; |
| 3297 | if (i >= 2) deliver_selectstring_regex = TRUE; |
| 3298 | if (i == 1 || i == 4) deliver_force_thaw = TRUE; |
| 3299 | argrest += Ustrlen(rsopts[i]); |
| 3300 | } |
| 3301 | } |
| 3302 | |
| 3303 | /* -R: Set string to match in addresses for forced queue run to |
| 3304 | pick out particular messages. */ |
| 3305 | |
| 3306 | if (*argrest) |
| 3307 | deliver_selectstring = argrest; |
| 3308 | else if (i+1 < argc) |
| 3309 | deliver_selectstring = argv[++i]; |
| 3310 | else |
| 3311 | { |
| 3312 | fprintf(stderr, "exim: string expected after -R\n"); |
| 3313 | exit(EXIT_FAILURE); |
| 3314 | } |
| 3315 | break; |
| 3316 | |
| 3317 | |
| 3318 | /* -r: an obsolete synonym for -f (see above) */ |
| 3319 | |
| 3320 | |
| 3321 | /* -S: Like -R but works on sender. */ |
| 3322 | |
| 3323 | case 'S': /* Synonymous with -qS... */ |
| 3324 | receiving_message = FALSE; |
| 3325 | |
| 3326 | /* -Sf: As -S (below) but force all deliveries, |
| 3327 | -Sff: Ditto, but also thaw all frozen messages, |
| 3328 | -Sr: String is regex |
| 3329 | -Srf: Regex and force |
| 3330 | -Srff: Regex and force and thaw |
| 3331 | |
| 3332 | in all cases provided there are no further characters in this |
| 3333 | argument. */ |
| 3334 | |
| 3335 | if (*argrest) |
| 3336 | { |
| 3337 | int i; |
| 3338 | for (i = 0; i < nelem(rsopts); i++) |
| 3339 | if (Ustrcmp(argrest, rsopts[i]) == 0) |
| 3340 | { |
| 3341 | if (i != 2) queue_run_force = TRUE; |
| 3342 | if (i >= 2) deliver_selectstring_sender_regex = TRUE; |
| 3343 | if (i == 1 || i == 4) deliver_force_thaw = TRUE; |
| 3344 | argrest += Ustrlen(rsopts[i]); |
| 3345 | } |
| 3346 | } |
| 3347 | |
| 3348 | /* -S: Set string to match in addresses for forced queue run to |
| 3349 | pick out particular messages. */ |
| 3350 | |
| 3351 | if (*argrest) |
| 3352 | deliver_selectstring_sender = argrest; |
| 3353 | else if (i+1 < argc) |
| 3354 | deliver_selectstring_sender = argv[++i]; |
| 3355 | else |
| 3356 | { |
| 3357 | fprintf(stderr, "exim: string expected after -S\n"); |
| 3358 | exit(EXIT_FAILURE); |
| 3359 | } |
| 3360 | break; |
| 3361 | |
| 3362 | /* -Tqt is an option that is exclusively for use by the testing suite. |
| 3363 | It is not recognized in other circumstances. It allows for the setting up |
| 3364 | of explicit "queue times" so that various warning/retry things can be |
| 3365 | tested. Otherwise variability of clock ticks etc. cause problems. */ |
| 3366 | |
| 3367 | case 'T': |
| 3368 | if (running_in_test_harness && Ustrcmp(argrest, "qt") == 0) |
| 3369 | fudged_queue_times = argv[++i]; |
| 3370 | else badarg = TRUE; |
| 3371 | break; |
| 3372 | |
| 3373 | |
| 3374 | /* -t: Set flag to extract recipients from body of message. */ |
| 3375 | |
| 3376 | case 't': |
| 3377 | if (*argrest == 0) extract_recipients = TRUE; |
| 3378 | |
| 3379 | /* -ti: Set flag to extract recipients from body of message, and also |
| 3380 | specify that dot does not end the message. */ |
| 3381 | |
| 3382 | else if (Ustrcmp(argrest, "i") == 0) |
| 3383 | { |
| 3384 | extract_recipients = TRUE; |
| 3385 | dot_ends = FALSE; |
| 3386 | } |
| 3387 | |
| 3388 | /* -tls-on-connect: don't wait for STARTTLS (for old clients) */ |
| 3389 | |
| 3390 | #ifdef SUPPORT_TLS |
| 3391 | else if (Ustrcmp(argrest, "ls-on-connect") == 0) tls_in.on_connect = TRUE; |
| 3392 | #endif |
| 3393 | |
| 3394 | else badarg = TRUE; |
| 3395 | break; |
| 3396 | |
| 3397 | |
| 3398 | /* -U: This means "initial user submission" in sendmail, apparently. The |
| 3399 | doc claims that in future sendmail may refuse syntactically invalid |
| 3400 | messages instead of fixing them. For the moment, we just ignore it. */ |
| 3401 | |
| 3402 | case 'U': |
| 3403 | break; |
| 3404 | |
| 3405 | |
| 3406 | /* -v: verify things - this is a very low-level debugging */ |
| 3407 | |
| 3408 | case 'v': |
| 3409 | if (*argrest == 0) |
| 3410 | { |
| 3411 | debug_selector |= D_v; |
| 3412 | debug_file = stderr; |
| 3413 | } |
| 3414 | else badarg = TRUE; |
| 3415 | break; |
| 3416 | |
| 3417 | |
| 3418 | /* -x: AIX uses this to indicate some fancy 8-bit character stuff: |
| 3419 | |
| 3420 | The -x flag tells the sendmail command that mail from a local |
| 3421 | mail program has National Language Support (NLS) extended characters |
| 3422 | in the body of the mail item. The sendmail command can send mail with |
| 3423 | extended NLS characters across networks that normally corrupts these |
| 3424 | 8-bit characters. |
| 3425 | |
| 3426 | As Exim is 8-bit clean, it just ignores this flag. */ |
| 3427 | |
| 3428 | case 'x': |
| 3429 | if (*argrest != 0) badarg = TRUE; |
| 3430 | break; |
| 3431 | |
| 3432 | /* -X: in sendmail: takes one parameter, logfile, and sends debugging |
| 3433 | logs to that file. We swallow the parameter and otherwise ignore it. */ |
| 3434 | |
| 3435 | case 'X': |
| 3436 | if (*argrest == '\0') |
| 3437 | if (++i >= argc) |
| 3438 | { |
| 3439 | fprintf(stderr, "exim: string expected after -X\n"); |
| 3440 | exit(EXIT_FAILURE); |
| 3441 | } |
| 3442 | break; |
| 3443 | |
| 3444 | case 'z': |
| 3445 | if (*argrest == '\0') |
| 3446 | if (++i < argc) log_oneline = argv[i]; else |
| 3447 | { |
| 3448 | fprintf(stderr, "exim: file name expected after %s\n", argv[i-1]); |
| 3449 | exit(EXIT_FAILURE); |
| 3450 | } |
| 3451 | break; |
| 3452 | |
| 3453 | /* All other initial characters are errors */ |
| 3454 | |
| 3455 | default: |
| 3456 | badarg = TRUE; |
| 3457 | break; |
| 3458 | } /* End of high-level switch statement */ |
| 3459 | |
| 3460 | /* Failed to recognize the option, or syntax error */ |
| 3461 | |
| 3462 | if (badarg) |
| 3463 | { |
| 3464 | fprintf(stderr, "exim abandoned: unknown, malformed, or incomplete " |
| 3465 | "option %s\n", arg); |
| 3466 | exit(EXIT_FAILURE); |
| 3467 | } |
| 3468 | } |
| 3469 | |
| 3470 | |
| 3471 | /* If -R or -S have been specified without -q, assume a single queue run. */ |
| 3472 | |
| 3473 | if ( (deliver_selectstring || deliver_selectstring_sender) |
| 3474 | && queue_interval < 0) |
| 3475 | queue_interval = 0; |
| 3476 | |
| 3477 | |
| 3478 | END_ARG: |
| 3479 | /* If usage_wanted is set we call the usage function - which never returns */ |
| 3480 | if (usage_wanted) exim_usage(called_as); |
| 3481 | |
| 3482 | /* Arguments have been processed. Check for incompatibilities. */ |
| 3483 | if (( |
| 3484 | (smtp_input || extract_recipients || recipients_arg < argc) && |
| 3485 | (daemon_listen || queue_interval >= 0 || bi_option || |
| 3486 | test_retry_arg >= 0 || test_rewrite_arg >= 0 || |
| 3487 | filter_test != FTEST_NONE || (msg_action_arg > 0 && !one_msg_action)) |
| 3488 | ) || |
| 3489 | ( |
| 3490 | msg_action_arg > 0 && |
| 3491 | (daemon_listen || queue_interval > 0 || list_options || |
| 3492 | (checking && msg_action != MSG_LOAD) || |
| 3493 | bi_option || test_retry_arg >= 0 || test_rewrite_arg >= 0) |
| 3494 | ) || |
| 3495 | ( |
| 3496 | (daemon_listen || queue_interval > 0) && |
| 3497 | (sender_address != NULL || list_options || list_queue || checking || |
| 3498 | bi_option) |
| 3499 | ) || |
| 3500 | ( |
| 3501 | daemon_listen && queue_interval == 0 |
| 3502 | ) || |
| 3503 | ( |
| 3504 | inetd_wait_mode && queue_interval >= 0 |
| 3505 | ) || |
| 3506 | ( |
| 3507 | list_options && |
| 3508 | (checking || smtp_input || extract_recipients || |
| 3509 | filter_test != FTEST_NONE || bi_option) |
| 3510 | ) || |
| 3511 | ( |
| 3512 | verify_address_mode && |
| 3513 | (address_test_mode || smtp_input || extract_recipients || |
| 3514 | filter_test != FTEST_NONE || bi_option) |
| 3515 | ) || |
| 3516 | ( |
| 3517 | address_test_mode && (smtp_input || extract_recipients || |
| 3518 | filter_test != FTEST_NONE || bi_option) |
| 3519 | ) || |
| 3520 | ( |
| 3521 | smtp_input && (sender_address != NULL || filter_test != FTEST_NONE || |
| 3522 | extract_recipients) |
| 3523 | ) || |
| 3524 | ( |
| 3525 | deliver_selectstring != NULL && queue_interval < 0 |
| 3526 | ) || |
| 3527 | ( |
| 3528 | msg_action == MSG_LOAD && |
| 3529 | (!expansion_test || expansion_test_message != NULL) |
| 3530 | ) |
| 3531 | ) |
| 3532 | { |
| 3533 | fprintf(stderr, "exim: incompatible command-line options or arguments\n"); |
| 3534 | exit(EXIT_FAILURE); |
| 3535 | } |
| 3536 | |
| 3537 | /* If debugging is set up, set the file and the file descriptor to pass on to |
| 3538 | child processes. It should, of course, be 2 for stderr. Also, force the daemon |
| 3539 | to run in the foreground. */ |
| 3540 | |
| 3541 | if (debug_selector != 0) |
| 3542 | { |
| 3543 | debug_file = stderr; |
| 3544 | debug_fd = fileno(debug_file); |
| 3545 | background_daemon = FALSE; |
| 3546 | if (running_in_test_harness) millisleep(100); /* lets caller finish */ |
| 3547 | if (debug_selector != D_v) /* -v only doesn't show this */ |
| 3548 | { |
| 3549 | debug_printf("Exim version %s uid=%ld gid=%ld pid=%d D=%x\n", |
| 3550 | version_string, (long int)real_uid, (long int)real_gid, (int)getpid(), |
| 3551 | debug_selector); |
| 3552 | if (!version_printed) |
| 3553 | show_whats_supported(stderr); |
| 3554 | } |
| 3555 | } |
| 3556 | |
| 3557 | /* When started with root privilege, ensure that the limits on the number of |
| 3558 | open files and the number of processes (where that is accessible) are |
| 3559 | sufficiently large, or are unset, in case Exim has been called from an |
| 3560 | environment where the limits are screwed down. Not all OS have the ability to |
| 3561 | change some of these limits. */ |
| 3562 | |
| 3563 | if (unprivileged) |
| 3564 | { |
| 3565 | DEBUG(D_any) debug_print_ids(US"Exim has no root privilege:"); |
| 3566 | } |
| 3567 | else |
| 3568 | { |
| 3569 | struct rlimit rlp; |
| 3570 | |
| 3571 | #ifdef RLIMIT_NOFILE |
| 3572 | if (getrlimit(RLIMIT_NOFILE, &rlp) < 0) |
| 3573 | { |
| 3574 | log_write(0, LOG_MAIN|LOG_PANIC, "getrlimit(RLIMIT_NOFILE) failed: %s", |
| 3575 | strerror(errno)); |
| 3576 | rlp.rlim_cur = rlp.rlim_max = 0; |
| 3577 | } |
| 3578 | |
| 3579 | /* I originally chose 1000 as a nice big number that was unlikely to |
| 3580 | be exceeded. It turns out that some older OS have a fixed upper limit of |
| 3581 | 256. */ |
| 3582 | |
| 3583 | if (rlp.rlim_cur < 1000) |
| 3584 | { |
| 3585 | rlp.rlim_cur = rlp.rlim_max = 1000; |
| 3586 | if (setrlimit(RLIMIT_NOFILE, &rlp) < 0) |
| 3587 | { |
| 3588 | rlp.rlim_cur = rlp.rlim_max = 256; |
| 3589 | if (setrlimit(RLIMIT_NOFILE, &rlp) < 0) |
| 3590 | log_write(0, LOG_MAIN|LOG_PANIC, "setrlimit(RLIMIT_NOFILE) failed: %s", |
| 3591 | strerror(errno)); |
| 3592 | } |
| 3593 | } |
| 3594 | #endif |
| 3595 | |
| 3596 | #ifdef RLIMIT_NPROC |
| 3597 | if (getrlimit(RLIMIT_NPROC, &rlp) < 0) |
| 3598 | { |
| 3599 | log_write(0, LOG_MAIN|LOG_PANIC, "getrlimit(RLIMIT_NPROC) failed: %s", |
| 3600 | strerror(errno)); |
| 3601 | rlp.rlim_cur = rlp.rlim_max = 0; |
| 3602 | } |
| 3603 | |
| 3604 | #ifdef RLIM_INFINITY |
| 3605 | if (rlp.rlim_cur != RLIM_INFINITY && rlp.rlim_cur < 1000) |
| 3606 | { |
| 3607 | rlp.rlim_cur = rlp.rlim_max = RLIM_INFINITY; |
| 3608 | #else |
| 3609 | if (rlp.rlim_cur < 1000) |
| 3610 | { |
| 3611 | rlp.rlim_cur = rlp.rlim_max = 1000; |
| 3612 | #endif |
| 3613 | if (setrlimit(RLIMIT_NPROC, &rlp) < 0) |
| 3614 | log_write(0, LOG_MAIN|LOG_PANIC, "setrlimit(RLIMIT_NPROC) failed: %s", |
| 3615 | strerror(errno)); |
| 3616 | } |
| 3617 | #endif |
| 3618 | } |
| 3619 | |
| 3620 | /* Exim is normally entered as root (but some special configurations are |
| 3621 | possible that don't do this). However, it always spins off sub-processes that |
| 3622 | set their uid and gid as required for local delivery. We don't want to pass on |
| 3623 | any extra groups that root may belong to, so we want to get rid of them all at |
| 3624 | this point. |
| 3625 | |
| 3626 | We need to obey setgroups() at this stage, before possibly giving up root |
| 3627 | privilege for a changed configuration file, but later on we might need to |
| 3628 | check on the additional groups for the admin user privilege - can't do that |
| 3629 | till after reading the config, which might specify the exim gid. Therefore, |
| 3630 | save the group list here first. */ |
| 3631 | |
| 3632 | group_count = getgroups(NGROUPS_MAX, group_list); |
| 3633 | if (group_count < 0) |
| 3634 | { |
| 3635 | fprintf(stderr, "exim: getgroups() failed: %s\n", strerror(errno)); |
| 3636 | exit(EXIT_FAILURE); |
| 3637 | } |
| 3638 | |
| 3639 | /* There is a fundamental difference in some BSD systems in the matter of |
| 3640 | groups. FreeBSD and BSDI are known to be different; NetBSD and OpenBSD are |
| 3641 | known not to be different. On the "different" systems there is a single group |
| 3642 | list, and the first entry in it is the current group. On all other versions of |
| 3643 | Unix there is a supplementary group list, which is in *addition* to the current |
| 3644 | group. Consequently, to get rid of all extraneous groups on a "standard" system |
| 3645 | you pass over 0 groups to setgroups(), while on a "different" system you pass |
| 3646 | over a single group - the current group, which is always the first group in the |
| 3647 | list. Calling setgroups() with zero groups on a "different" system results in |
| 3648 | an error return. The following code should cope with both types of system. |
| 3649 | |
| 3650 | However, if this process isn't running as root, setgroups() can't be used |
| 3651 | since you have to be root to run it, even if throwing away groups. Not being |
| 3652 | root here happens only in some unusual configurations. We just ignore the |
| 3653 | error. */ |
| 3654 | |
| 3655 | if (setgroups(0, NULL) != 0) |
| 3656 | { |
| 3657 | if (setgroups(1, group_list) != 0 && !unprivileged) |
| 3658 | { |
| 3659 | fprintf(stderr, "exim: setgroups() failed: %s\n", strerror(errno)); |
| 3660 | exit(EXIT_FAILURE); |
| 3661 | } |
| 3662 | } |
| 3663 | |
| 3664 | /* If the configuration file name has been altered by an argument on the |
| 3665 | command line (either a new file name or a macro definition) and the caller is |
| 3666 | not root, or if this is a filter testing run, remove any setuid privilege the |
| 3667 | program has and run as the underlying user. |
| 3668 | |
| 3669 | The exim user is locked out of this, which severely restricts the use of -C |
| 3670 | for some purposes. |
| 3671 | |
| 3672 | Otherwise, set the real ids to the effective values (should be root unless run |
| 3673 | from inetd, which it can either be root or the exim uid, if one is configured). |
| 3674 | |
| 3675 | There is a private mechanism for bypassing some of this, in order to make it |
| 3676 | possible to test lots of configurations automatically, without having either to |
| 3677 | recompile each time, or to patch in an actual configuration file name and other |
| 3678 | values (such as the path name). If running in the test harness, pretend that |
| 3679 | configuration file changes and macro definitions haven't happened. */ |
| 3680 | |
| 3681 | if (( /* EITHER */ |
| 3682 | (!trusted_config || /* Config changed, or */ |
| 3683 | !macros_trusted()) && /* impermissible macros and */ |
| 3684 | real_uid != root_uid && /* Not root, and */ |
| 3685 | !running_in_test_harness /* Not fudged */ |
| 3686 | ) || /* OR */ |
| 3687 | expansion_test /* expansion testing */ |
| 3688 | || /* OR */ |
| 3689 | filter_test != FTEST_NONE) /* Filter testing */ |
| 3690 | { |
| 3691 | setgroups(group_count, group_list); |
| 3692 | exim_setugid(real_uid, real_gid, FALSE, |
| 3693 | US"-C, -D, -be or -bf forces real uid"); |
| 3694 | removed_privilege = TRUE; |
| 3695 | |
| 3696 | /* In the normal case when Exim is called like this, stderr is available |
| 3697 | and should be used for any logging information because attempts to write |
| 3698 | to the log will usually fail. To arrange this, we unset really_exim. However, |
| 3699 | if no stderr is available there is no point - we might as well have a go |
| 3700 | at the log (if it fails, syslog will be written). |
| 3701 | |
| 3702 | Note that if the invoker is Exim, the logs remain available. Messing with |
| 3703 | this causes unlogged successful deliveries. */ |
| 3704 | |
| 3705 | if ((log_stderr != NULL) && (real_uid != exim_uid)) |
| 3706 | really_exim = FALSE; |
| 3707 | } |
| 3708 | |
| 3709 | /* Privilege is to be retained for the moment. It may be dropped later, |
| 3710 | depending on the job that this Exim process has been asked to do. For now, set |
| 3711 | the real uid to the effective so that subsequent re-execs of Exim are done by a |
| 3712 | privileged user. */ |
| 3713 | |
| 3714 | else exim_setugid(geteuid(), getegid(), FALSE, US"forcing real = effective"); |
| 3715 | |
| 3716 | /* If testing a filter, open the file(s) now, before wasting time doing other |
| 3717 | setups and reading the message. */ |
| 3718 | |
| 3719 | if ((filter_test & FTEST_SYSTEM) != 0) |
| 3720 | { |
| 3721 | filter_sfd = Uopen(filter_test_sfile, O_RDONLY, 0); |
| 3722 | if (filter_sfd < 0) |
| 3723 | { |
| 3724 | fprintf(stderr, "exim: failed to open %s: %s\n", filter_test_sfile, |
| 3725 | strerror(errno)); |
| 3726 | return EXIT_FAILURE; |
| 3727 | } |
| 3728 | } |
| 3729 | |
| 3730 | if ((filter_test & FTEST_USER) != 0) |
| 3731 | { |
| 3732 | filter_ufd = Uopen(filter_test_ufile, O_RDONLY, 0); |
| 3733 | if (filter_ufd < 0) |
| 3734 | { |
| 3735 | fprintf(stderr, "exim: failed to open %s: %s\n", filter_test_ufile, |
| 3736 | strerror(errno)); |
| 3737 | return EXIT_FAILURE; |
| 3738 | } |
| 3739 | } |
| 3740 | |
| 3741 | /* Initialise lookup_list |
| 3742 | If debugging, already called above via version reporting. |
| 3743 | In either case, we initialise the list of available lookups while running |
| 3744 | as root. All dynamically modules are loaded from a directory which is |
| 3745 | hard-coded into the binary and is code which, if not a module, would be |
| 3746 | part of Exim already. Ability to modify the content of the directory |
| 3747 | is equivalent to the ability to modify a setuid binary! |
| 3748 | |
| 3749 | This needs to happen before we read the main configuration. */ |
| 3750 | init_lookup_list(); |
| 3751 | |
| 3752 | #ifdef SUPPORT_I18N |
| 3753 | if (running_in_test_harness) smtputf8_advertise_hosts = NULL; |
| 3754 | #endif |
| 3755 | |
| 3756 | /* Read the main runtime configuration data; this gives up if there |
| 3757 | is a failure. It leaves the configuration file open so that the subsequent |
| 3758 | configuration data for delivery can be read if needed. |
| 3759 | |
| 3760 | NOTE: immediatly after opening the configuration file we change the working |
| 3761 | directory to "/"! Later we change to $spool_directory. We do it there, because |
| 3762 | during readconf_main() some expansion takes place already. */ |
| 3763 | |
| 3764 | /* Store the initial cwd before we change directories */ |
| 3765 | if ((initial_cwd = os_getcwd(NULL, 0)) == NULL) |
| 3766 | { |
| 3767 | perror("exim: can't get the current working directory"); |
| 3768 | exit(EXIT_FAILURE); |
| 3769 | } |
| 3770 | |
| 3771 | /* checking: |
| 3772 | -be[m] expansion test - |
| 3773 | -b[fF] filter test new |
| 3774 | -bh[c] host test - |
| 3775 | -bmalware malware_test_file new |
| 3776 | -brt retry test new |
| 3777 | -brw rewrite test new |
| 3778 | -bt address test - |
| 3779 | -bv[s] address verify - |
| 3780 | list_options: |
| 3781 | -bP <option> (except -bP config, which sets list_config) |
| 3782 | |
| 3783 | If any of these options is set, we suppress warnings about configuration |
| 3784 | issues (currently about tls_advertise_hosts and keep_environment not being |
| 3785 | defined) */ |
| 3786 | |
| 3787 | readconf_main(checking || list_options); |
| 3788 | |
| 3789 | /* Now in directory "/" */ |
| 3790 | |
| 3791 | if (cleanup_environment() == FALSE) |
| 3792 | log_write(0, LOG_PANIC_DIE, "Can't cleanup environment"); |
| 3793 | |
| 3794 | |
| 3795 | /* If an action on specific messages is requested, or if a daemon or queue |
| 3796 | runner is being started, we need to know if Exim was called by an admin user. |
| 3797 | This is the case if the real user is root or exim, or if the real group is |
| 3798 | exim, or if one of the supplementary groups is exim or a group listed in |
| 3799 | admin_groups. We don't fail all message actions immediately if not admin_user, |
| 3800 | since some actions can be performed by non-admin users. Instead, set admin_user |
| 3801 | for later interrogation. */ |
| 3802 | |
| 3803 | if (real_uid == root_uid || real_uid == exim_uid || real_gid == exim_gid) |
| 3804 | admin_user = TRUE; |
| 3805 | else |
| 3806 | { |
| 3807 | int i, j; |
| 3808 | for (i = 0; i < group_count; i++) |
| 3809 | { |
| 3810 | if (group_list[i] == exim_gid) admin_user = TRUE; |
| 3811 | else if (admin_groups != NULL) |
| 3812 | { |
| 3813 | for (j = 1; j <= (int)(admin_groups[0]); j++) |
| 3814 | if (admin_groups[j] == group_list[i]) |
| 3815 | { admin_user = TRUE; break; } |
| 3816 | } |
| 3817 | if (admin_user) break; |
| 3818 | } |
| 3819 | } |
| 3820 | |
| 3821 | /* Another group of privileged users are the trusted users. These are root, |
| 3822 | exim, and any caller matching trusted_users or trusted_groups. Trusted callers |
| 3823 | are permitted to specify sender_addresses with -f on the command line, and |
| 3824 | other message parameters as well. */ |
| 3825 | |
| 3826 | if (real_uid == root_uid || real_uid == exim_uid) |
| 3827 | trusted_caller = TRUE; |
| 3828 | else |
| 3829 | { |
| 3830 | int i, j; |
| 3831 | |
| 3832 | if (trusted_users != NULL) |
| 3833 | { |
| 3834 | for (i = 1; i <= (int)(trusted_users[0]); i++) |
| 3835 | if (trusted_users[i] == real_uid) |
| 3836 | { trusted_caller = TRUE; break; } |
| 3837 | } |
| 3838 | |
| 3839 | if (!trusted_caller && trusted_groups != NULL) |
| 3840 | { |
| 3841 | for (i = 1; i <= (int)(trusted_groups[0]); i++) |
| 3842 | { |
| 3843 | if (trusted_groups[i] == real_gid) |
| 3844 | trusted_caller = TRUE; |
| 3845 | else for (j = 0; j < group_count; j++) |
| 3846 | { |
| 3847 | if (trusted_groups[i] == group_list[j]) |
| 3848 | { trusted_caller = TRUE; break; } |
| 3849 | } |
| 3850 | if (trusted_caller) break; |
| 3851 | } |
| 3852 | } |
| 3853 | } |
| 3854 | |
| 3855 | /* Handle the decoding of logging options. */ |
| 3856 | |
| 3857 | decode_bits(log_selector, log_selector_size, log_notall, |
| 3858 | log_selector_string, log_options, log_options_count, US"log", 0); |
| 3859 | |
| 3860 | DEBUG(D_any) |
| 3861 | { |
| 3862 | int i; |
| 3863 | debug_printf("configuration file is %s\n", config_main_filename); |
| 3864 | debug_printf("log selectors ="); |
| 3865 | for (i = 0; i < log_selector_size; i++) |
| 3866 | debug_printf(" %08x", log_selector[i]); |
| 3867 | debug_printf("\n"); |
| 3868 | } |
| 3869 | |
| 3870 | /* If domain literals are not allowed, check the sender address that was |
| 3871 | supplied with -f. Ditto for a stripped trailing dot. */ |
| 3872 | |
| 3873 | if (sender_address != NULL) |
| 3874 | { |
| 3875 | if (sender_address[sender_address_domain] == '[' && !allow_domain_literals) |
| 3876 | { |
| 3877 | fprintf(stderr, "exim: bad -f address \"%s\": domain literals not " |
| 3878 | "allowed\n", sender_address); |
| 3879 | return EXIT_FAILURE; |
| 3880 | } |
| 3881 | if (f_end_dot && !strip_trailing_dot) |
| 3882 | { |
| 3883 | fprintf(stderr, "exim: bad -f address \"%s.\": domain is malformed " |
| 3884 | "(trailing dot not allowed)\n", sender_address); |
| 3885 | return EXIT_FAILURE; |
| 3886 | } |
| 3887 | } |
| 3888 | |
| 3889 | /* See if an admin user overrode our logging. */ |
| 3890 | |
| 3891 | if (cmdline_syslog_name != NULL) |
| 3892 | { |
| 3893 | if (admin_user) |
| 3894 | { |
| 3895 | syslog_processname = cmdline_syslog_name; |
| 3896 | log_file_path = string_copy(CUS"syslog"); |
| 3897 | } |
| 3898 | else |
| 3899 | { |
| 3900 | /* not a panic, non-privileged users should not be able to spam paniclog */ |
| 3901 | fprintf(stderr, |
| 3902 | "exim: you lack sufficient privilege to specify syslog process name\n"); |
| 3903 | return EXIT_FAILURE; |
| 3904 | } |
| 3905 | } |
| 3906 | |
| 3907 | /* Paranoia check of maximum lengths of certain strings. There is a check |
| 3908 | on the length of the log file path in log.c, which will come into effect |
| 3909 | if there are any calls to write the log earlier than this. However, if we |
| 3910 | get this far but the string is very long, it is better to stop now than to |
| 3911 | carry on and (e.g.) receive a message and then have to collapse. The call to |
| 3912 | log_write() from here will cause the ultimate panic collapse if the complete |
| 3913 | file name exceeds the buffer length. */ |
| 3914 | |
| 3915 | if (Ustrlen(log_file_path) > 200) |
| 3916 | log_write(0, LOG_MAIN|LOG_PANIC_DIE, |
| 3917 | "log_file_path is longer than 200 chars: aborting"); |
| 3918 | |
| 3919 | if (Ustrlen(pid_file_path) > 200) |
| 3920 | log_write(0, LOG_MAIN|LOG_PANIC_DIE, |
| 3921 | "pid_file_path is longer than 200 chars: aborting"); |
| 3922 | |
| 3923 | if (Ustrlen(spool_directory) > 200) |
| 3924 | log_write(0, LOG_MAIN|LOG_PANIC_DIE, |
| 3925 | "spool_directory is longer than 200 chars: aborting"); |
| 3926 | |
| 3927 | /* Length check on the process name given to syslog for its TAG field, |
| 3928 | which is only permitted to be 32 characters or less. See RFC 3164. */ |
| 3929 | |
| 3930 | if (Ustrlen(syslog_processname) > 32) |
| 3931 | log_write(0, LOG_MAIN|LOG_PANIC_DIE, |
| 3932 | "syslog_processname is longer than 32 chars: aborting"); |
| 3933 | |
| 3934 | if (log_oneline) |
| 3935 | { |
| 3936 | if (admin_user) |
| 3937 | { |
| 3938 | log_write(0, LOG_MAIN, "%s", log_oneline); |
| 3939 | return EXIT_SUCCESS; |
| 3940 | } |
| 3941 | else |
| 3942 | return EXIT_FAILURE; |
| 3943 | } |
| 3944 | |
| 3945 | /* In some operating systems, the environment variable TMPDIR controls where |
| 3946 | temporary files are created; Exim doesn't use these (apart from when delivering |
| 3947 | to MBX mailboxes), but called libraries such as DBM libraries may require them. |
| 3948 | If TMPDIR is found in the environment, reset it to the value defined in the |
| 3949 | EXIM_TMPDIR macro, if this macro is defined. For backward compatibility this |
| 3950 | macro may be called TMPDIR in old "Local/Makefile"s. It's converted to |
| 3951 | EXIM_TMPDIR by the build scripts. |
| 3952 | */ |
| 3953 | |
| 3954 | #ifdef EXIM_TMPDIR |
| 3955 | { |
| 3956 | uschar **p; |
| 3957 | if (environ) for (p = USS environ; *p != NULL; p++) |
| 3958 | { |
| 3959 | if (Ustrncmp(*p, "TMPDIR=", 7) == 0 && |
| 3960 | Ustrcmp(*p+7, EXIM_TMPDIR) != 0) |
| 3961 | { |
| 3962 | uschar *newp = malloc(Ustrlen(EXIM_TMPDIR) + 8); |
| 3963 | sprintf(CS newp, "TMPDIR=%s", EXIM_TMPDIR); |
| 3964 | *p = newp; |
| 3965 | DEBUG(D_any) debug_printf("reset TMPDIR=%s in environment\n", EXIM_TMPDIR); |
| 3966 | } |
| 3967 | } |
| 3968 | } |
| 3969 | #endif |
| 3970 | |
| 3971 | /* Timezone handling. If timezone_string is "utc", set a flag to cause all |
| 3972 | timestamps to be in UTC (gmtime() is used instead of localtime()). Otherwise, |
| 3973 | we may need to get rid of a bogus timezone setting. This can arise when Exim is |
| 3974 | called by a user who has set the TZ variable. This then affects the timestamps |
| 3975 | in log files and in Received: headers, and any created Date: header lines. The |
| 3976 | required timezone is settable in the configuration file, so nothing can be done |
| 3977 | about this earlier - but hopefully nothing will normally be logged earlier than |
| 3978 | this. We have to make a new environment if TZ is wrong, but don't bother if |
| 3979 | timestamps_utc is set, because then all times are in UTC anyway. */ |
| 3980 | |
| 3981 | if (timezone_string != NULL && strcmpic(timezone_string, US"UTC") == 0) |
| 3982 | { |
| 3983 | timestamps_utc = TRUE; |
| 3984 | } |
| 3985 | else |
| 3986 | { |
| 3987 | uschar *envtz = US getenv("TZ"); |
| 3988 | if ((envtz == NULL && timezone_string != NULL) || |
| 3989 | (envtz != NULL && |
| 3990 | (timezone_string == NULL || |
| 3991 | Ustrcmp(timezone_string, envtz) != 0))) |
| 3992 | { |
| 3993 | uschar **p = USS environ; |
| 3994 | uschar **new; |
| 3995 | uschar **newp; |
| 3996 | int count = 0; |
| 3997 | if (environ) while (*p++ != NULL) count++; |
| 3998 | if (envtz == NULL) count++; |
| 3999 | newp = new = malloc(sizeof(uschar *) * (count + 1)); |
| 4000 | if (environ) for (p = USS environ; *p != NULL; p++) |
| 4001 | { |
| 4002 | if (Ustrncmp(*p, "TZ=", 3) == 0) continue; |
| 4003 | *newp++ = *p; |
| 4004 | } |
| 4005 | if (timezone_string != NULL) |
| 4006 | { |
| 4007 | *newp = malloc(Ustrlen(timezone_string) + 4); |
| 4008 | sprintf(CS *newp++, "TZ=%s", timezone_string); |
| 4009 | } |
| 4010 | *newp = NULL; |
| 4011 | environ = CSS new; |
| 4012 | tzset(); |
| 4013 | DEBUG(D_any) debug_printf("Reset TZ to %s: time is %s\n", timezone_string, |
| 4014 | tod_stamp(tod_log)); |
| 4015 | } |
| 4016 | } |
| 4017 | |
| 4018 | /* Handle the case when we have removed the setuid privilege because of -C or |
| 4019 | -D. This means that the caller of Exim was not root. |
| 4020 | |
| 4021 | There is a problem if we were running as the Exim user. The sysadmin may |
| 4022 | expect this case to retain privilege because "the binary was called by the |
| 4023 | Exim user", but it hasn't, because either the -D option set macros, or the |
| 4024 | -C option set a non-trusted configuration file. There are two possibilities: |
| 4025 | |
| 4026 | (1) If deliver_drop_privilege is set, Exim is not going to re-exec in order |
| 4027 | to do message deliveries. Thus, the fact that it is running as a |
| 4028 | non-privileged user is plausible, and might be wanted in some special |
| 4029 | configurations. However, really_exim will have been set false when |
| 4030 | privilege was dropped, to stop Exim trying to write to its normal log |
| 4031 | files. Therefore, re-enable normal log processing, assuming the sysadmin |
| 4032 | has set up the log directory correctly. |
| 4033 | |
| 4034 | (2) If deliver_drop_privilege is not set, the configuration won't work as |
| 4035 | apparently intended, and so we log a panic message. In order to retain |
| 4036 | root for -C or -D, the caller must either be root or be invoking a |
| 4037 | trusted configuration file (when deliver_drop_privilege is false). */ |
| 4038 | |
| 4039 | if (removed_privilege && (!trusted_config || macros != NULL) && |
| 4040 | real_uid == exim_uid) |
| 4041 | { |
| 4042 | if (deliver_drop_privilege) |
| 4043 | really_exim = TRUE; /* let logging work normally */ |
| 4044 | else |
| 4045 | log_write(0, LOG_MAIN|LOG_PANIC, |
| 4046 | "exim user lost privilege for using %s option", |
| 4047 | trusted_config? "-D" : "-C"); |
| 4048 | } |
| 4049 | |
| 4050 | /* Start up Perl interpreter if Perl support is configured and there is a |
| 4051 | perl_startup option, and the configuration or the command line specifies |
| 4052 | initializing starting. Note that the global variables are actually called |
| 4053 | opt_perl_xxx to avoid clashing with perl's namespace (perl_*). */ |
| 4054 | |
| 4055 | #ifdef EXIM_PERL |
| 4056 | if (perl_start_option != 0) |
| 4057 | opt_perl_at_start = (perl_start_option > 0); |
| 4058 | if (opt_perl_at_start && opt_perl_startup != NULL) |
| 4059 | { |
| 4060 | uschar *errstr; |
| 4061 | DEBUG(D_any) debug_printf("Starting Perl interpreter\n"); |
| 4062 | errstr = init_perl(opt_perl_startup); |
| 4063 | if (errstr != NULL) |
| 4064 | { |
| 4065 | fprintf(stderr, "exim: error in perl_startup code: %s\n", errstr); |
| 4066 | return EXIT_FAILURE; |
| 4067 | } |
| 4068 | opt_perl_started = TRUE; |
| 4069 | } |
| 4070 | #endif /* EXIM_PERL */ |
| 4071 | |
| 4072 | /* Log the arguments of the call if the configuration file said so. This is |
| 4073 | a debugging feature for finding out what arguments certain MUAs actually use. |
| 4074 | Don't attempt it if logging is disabled, or if listing variables or if |
| 4075 | verifying/testing addresses or expansions. */ |
| 4076 | |
| 4077 | if (((debug_selector & D_any) != 0 || LOGGING(arguments)) |
| 4078 | && really_exim && !list_options && !checking) |
| 4079 | { |
| 4080 | int i; |
| 4081 | uschar *p = big_buffer; |
| 4082 | Ustrcpy(p, "cwd= (failed)"); |
| 4083 | |
| 4084 | Ustrncpy(p + 4, initial_cwd, big_buffer_size-5); |
| 4085 | |
| 4086 | while (*p) p++; |
| 4087 | (void)string_format(p, big_buffer_size - (p - big_buffer), " %d args:", argc); |
| 4088 | while (*p) p++; |
| 4089 | for (i = 0; i < argc; i++) |
| 4090 | { |
| 4091 | int len = Ustrlen(argv[i]); |
| 4092 | const uschar *printing; |
| 4093 | uschar *quote; |
| 4094 | if (p + len + 8 >= big_buffer + big_buffer_size) |
| 4095 | { |
| 4096 | Ustrcpy(p, " ..."); |
| 4097 | log_write(0, LOG_MAIN, "%s", big_buffer); |
| 4098 | Ustrcpy(big_buffer, "..."); |
| 4099 | p = big_buffer + 3; |
| 4100 | } |
| 4101 | printing = string_printing(argv[i]); |
| 4102 | if (printing[0] == 0) quote = US"\""; else |
| 4103 | { |
| 4104 | const uschar *pp = printing; |
| 4105 | quote = US""; |
| 4106 | while (*pp != 0) if (isspace(*pp++)) { quote = US"\""; break; } |
| 4107 | } |
| 4108 | sprintf(CS p, " %s%.*s%s", quote, (int)(big_buffer_size - |
| 4109 | (p - big_buffer) - 4), printing, quote); |
| 4110 | while (*p) p++; |
| 4111 | } |
| 4112 | |
| 4113 | if (LOGGING(arguments)) |
| 4114 | log_write(0, LOG_MAIN, "%s", big_buffer); |
| 4115 | else |
| 4116 | debug_printf("%s\n", big_buffer); |
| 4117 | } |
| 4118 | |
| 4119 | /* Set the working directory to be the top-level spool directory. We don't rely |
| 4120 | on this in the code, which always uses fully qualified names, but it's useful |
| 4121 | for core dumps etc. Don't complain if it fails - the spool directory might not |
| 4122 | be generally accessible and calls with the -C option (and others) have lost |
| 4123 | privilege by now. Before the chdir, we try to ensure that the directory exists. |
| 4124 | */ |
| 4125 | |
| 4126 | if (Uchdir(spool_directory) != 0) |
| 4127 | { |
| 4128 | int dummy; |
| 4129 | (void)directory_make(spool_directory, US"", SPOOL_DIRECTORY_MODE, FALSE); |
| 4130 | dummy = /* quieten compiler */ Uchdir(spool_directory); |
| 4131 | } |
| 4132 | |
| 4133 | /* Handle calls with the -bi option. This is a sendmail option to rebuild *the* |
| 4134 | alias file. Exim doesn't have such a concept, but this call is screwed into |
| 4135 | Sun's YP makefiles. Handle this by calling a configured script, as the real |
| 4136 | user who called Exim. The -oA option can be used to pass an argument to the |
| 4137 | script. */ |
| 4138 | |
| 4139 | if (bi_option) |
| 4140 | { |
| 4141 | (void)fclose(config_file); |
| 4142 | if (bi_command != NULL) |
| 4143 | { |
| 4144 | int i = 0; |
| 4145 | uschar *argv[3]; |
| 4146 | argv[i++] = bi_command; |
| 4147 | if (alias_arg != NULL) argv[i++] = alias_arg; |
| 4148 | argv[i++] = NULL; |
| 4149 | |
| 4150 | setgroups(group_count, group_list); |
| 4151 | exim_setugid(real_uid, real_gid, FALSE, US"running bi_command"); |
| 4152 | |
| 4153 | DEBUG(D_exec) debug_printf("exec %.256s %.256s\n", argv[0], |
| 4154 | (argv[1] == NULL)? US"" : argv[1]); |
| 4155 | |
| 4156 | execv(CS argv[0], (char *const *)argv); |
| 4157 | fprintf(stderr, "exim: exec failed: %s\n", strerror(errno)); |
| 4158 | exit(EXIT_FAILURE); |
| 4159 | } |
| 4160 | else |
| 4161 | { |
| 4162 | DEBUG(D_any) debug_printf("-bi used but bi_command not set; exiting\n"); |
| 4163 | exit(EXIT_SUCCESS); |
| 4164 | } |
| 4165 | } |
| 4166 | |
| 4167 | /* We moved the admin/trusted check to be immediately after reading the |
| 4168 | configuration file. We leave these prints here to ensure that syslog setup, |
| 4169 | logfile setup, and so on has already happened. */ |
| 4170 | |
| 4171 | if (trusted_caller) DEBUG(D_any) debug_printf("trusted user\n"); |
| 4172 | if (admin_user) DEBUG(D_any) debug_printf("admin user\n"); |
| 4173 | |
| 4174 | /* Only an admin user may start the daemon or force a queue run in the default |
| 4175 | configuration, but the queue run restriction can be relaxed. Only an admin |
| 4176 | user may request that a message be returned to its sender forthwith. Only an |
| 4177 | admin user may specify a debug level greater than D_v (because it might show |
| 4178 | passwords, etc. in lookup queries). Only an admin user may request a queue |
| 4179 | count. Only an admin user can use the test interface to scan for email |
| 4180 | (because Exim will be in the spool dir and able to look at mails). */ |
| 4181 | |
| 4182 | if (!admin_user) |
| 4183 | { |
| 4184 | BOOL debugset = (debug_selector & ~D_v) != 0; |
| 4185 | if (deliver_give_up || daemon_listen || malware_test_file || |
| 4186 | (count_queue && queue_list_requires_admin) || |
| 4187 | (list_queue && queue_list_requires_admin) || |
| 4188 | (queue_interval >= 0 && prod_requires_admin) || |
| 4189 | (debugset && !running_in_test_harness)) |
| 4190 | { |
| 4191 | fprintf(stderr, "exim:%s permission denied\n", debugset? " debugging" : ""); |
| 4192 | exit(EXIT_FAILURE); |
| 4193 | } |
| 4194 | } |
| 4195 | |
| 4196 | /* If the real user is not root or the exim uid, the argument for passing |
| 4197 | in an open TCP/IP connection for another message is not permitted, nor is |
| 4198 | running with the -N option for any delivery action, unless this call to exim is |
| 4199 | one that supplied an input message, or we are using a patched exim for |
| 4200 | regression testing. */ |
| 4201 | |
| 4202 | if (real_uid != root_uid && real_uid != exim_uid && |
| 4203 | (continue_hostname != NULL || |
| 4204 | (dont_deliver && |
| 4205 | (queue_interval >= 0 || daemon_listen || msg_action_arg > 0) |
| 4206 | )) && !running_in_test_harness) |
| 4207 | { |
| 4208 | fprintf(stderr, "exim: Permission denied\n"); |
| 4209 | return EXIT_FAILURE; |
| 4210 | } |
| 4211 | |
| 4212 | /* If the caller is not trusted, certain arguments are ignored when running for |
| 4213 | real, but are permitted when checking things (-be, -bv, -bt, -bh, -bf, -bF). |
| 4214 | Note that authority for performing certain actions on messages is tested in the |
| 4215 | queue_action() function. */ |
| 4216 | |
| 4217 | if (!trusted_caller && !checking) |
| 4218 | { |
| 4219 | sender_host_name = sender_host_address = interface_address = |
| 4220 | sender_ident = received_protocol = NULL; |
| 4221 | sender_host_port = interface_port = 0; |
| 4222 | sender_host_authenticated = authenticated_sender = authenticated_id = NULL; |
| 4223 | } |
| 4224 | |
| 4225 | /* If a sender host address is set, extract the optional port number off the |
| 4226 | end of it and check its syntax. Do the same thing for the interface address. |
| 4227 | Exim exits if the syntax is bad. */ |
| 4228 | |
| 4229 | else |
| 4230 | { |
| 4231 | if (sender_host_address != NULL) |
| 4232 | sender_host_port = check_port(sender_host_address); |
| 4233 | if (interface_address != NULL) |
| 4234 | interface_port = check_port(interface_address); |
| 4235 | } |
| 4236 | |
| 4237 | /* If the caller is trusted, then they can use -G to suppress_local_fixups. */ |
| 4238 | if (flag_G) |
| 4239 | { |
| 4240 | if (trusted_caller) |
| 4241 | { |
| 4242 | suppress_local_fixups = suppress_local_fixups_default = TRUE; |
| 4243 | DEBUG(D_acl) debug_printf("suppress_local_fixups forced on by -G\n"); |
| 4244 | } |
| 4245 | else |
| 4246 | { |
| 4247 | fprintf(stderr, "exim: permission denied (-G requires a trusted user)\n"); |
| 4248 | return EXIT_FAILURE; |
| 4249 | } |
| 4250 | } |
| 4251 | |
| 4252 | /* If an SMTP message is being received check to see if the standard input is a |
| 4253 | TCP/IP socket. If it is, we assume that Exim was called from inetd if the |
| 4254 | caller is root or the Exim user, or if the port is a privileged one. Otherwise, |
| 4255 | barf. */ |
| 4256 | |
| 4257 | if (smtp_input) |
| 4258 | { |
| 4259 | union sockaddr_46 inetd_sock; |
| 4260 | EXIM_SOCKLEN_T size = sizeof(inetd_sock); |
| 4261 | if (getpeername(0, (struct sockaddr *)(&inetd_sock), &size) == 0) |
| 4262 | { |
| 4263 | int family = ((struct sockaddr *)(&inetd_sock))->sa_family; |
| 4264 | if (family == AF_INET || family == AF_INET6) |
| 4265 | { |
| 4266 | union sockaddr_46 interface_sock; |
| 4267 | size = sizeof(interface_sock); |
| 4268 | |
| 4269 | if (getsockname(0, (struct sockaddr *)(&interface_sock), &size) == 0) |
| 4270 | interface_address = host_ntoa(-1, &interface_sock, NULL, |
| 4271 | &interface_port); |
| 4272 | |
| 4273 | if (host_is_tls_on_connect_port(interface_port)) tls_in.on_connect = TRUE; |
| 4274 | |
| 4275 | if (real_uid == root_uid || real_uid == exim_uid || interface_port < 1024) |
| 4276 | { |
| 4277 | is_inetd = TRUE; |
| 4278 | sender_host_address = host_ntoa(-1, (struct sockaddr *)(&inetd_sock), |
| 4279 | NULL, &sender_host_port); |
| 4280 | if (mua_wrapper) log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Input from " |
| 4281 | "inetd is not supported when mua_wrapper is set"); |
| 4282 | } |
| 4283 | else |
| 4284 | { |
| 4285 | fprintf(stderr, |
| 4286 | "exim: Permission denied (unprivileged user, unprivileged port)\n"); |
| 4287 | return EXIT_FAILURE; |
| 4288 | } |
| 4289 | } |
| 4290 | } |
| 4291 | } |
| 4292 | |
| 4293 | /* If the load average is going to be needed while receiving a message, get it |
| 4294 | now for those OS that require the first call to os_getloadavg() to be done as |
| 4295 | root. There will be further calls later for each message received. */ |
| 4296 | |
| 4297 | #ifdef LOAD_AVG_NEEDS_ROOT |
| 4298 | if (receiving_message && |
| 4299 | (queue_only_load >= 0 || |
| 4300 | (is_inetd && smtp_load_reserve >= 0) |
| 4301 | )) |
| 4302 | { |
| 4303 | load_average = OS_GETLOADAVG(); |
| 4304 | } |
| 4305 | #endif |
| 4306 | |
| 4307 | /* The queue_only configuration option can be overridden by -odx on the command |
| 4308 | line, except that if queue_only_override is false, queue_only cannot be unset |
| 4309 | from the command line. */ |
| 4310 | |
| 4311 | if (queue_only_set && (queue_only_override || arg_queue_only)) |
| 4312 | queue_only = arg_queue_only; |
| 4313 | |
| 4314 | /* The receive_timeout and smtp_receive_timeout options can be overridden by |
| 4315 | -or and -os. */ |
| 4316 | |
| 4317 | if (arg_receive_timeout >= 0) receive_timeout = arg_receive_timeout; |
| 4318 | if (arg_smtp_receive_timeout >= 0) |
| 4319 | smtp_receive_timeout = arg_smtp_receive_timeout; |
| 4320 | |
| 4321 | /* If Exim was started with root privilege, unless we have already removed the |
| 4322 | root privilege above as a result of -C, -D, -be, -bf or -bF, remove it now |
| 4323 | except when starting the daemon or doing some kind of delivery or address |
| 4324 | testing (-bt). These are the only cases when root need to be retained. We run |
| 4325 | as exim for -bv and -bh. However, if deliver_drop_privilege is set, root is |
| 4326 | retained only for starting the daemon. We always do the initgroups() in this |
| 4327 | situation (controlled by the TRUE below), in order to be as close as possible |
| 4328 | to the state Exim usually runs in. */ |
| 4329 | |
| 4330 | if (!unprivileged && /* originally had root AND */ |
| 4331 | !removed_privilege && /* still got root AND */ |
| 4332 | !daemon_listen && /* not starting the daemon */ |
| 4333 | queue_interval <= 0 && /* (either kind of daemon) */ |
| 4334 | ( /* AND EITHER */ |
| 4335 | deliver_drop_privilege || /* requested unprivileged */ |
| 4336 | ( /* OR */ |
| 4337 | queue_interval < 0 && /* not running the queue */ |
| 4338 | (msg_action_arg < 0 || /* and */ |
| 4339 | msg_action != MSG_DELIVER) && /* not delivering and */ |
| 4340 | (!checking || !address_test_mode) /* not address checking */ |
| 4341 | ) |
| 4342 | )) |
| 4343 | { |
| 4344 | exim_setugid(exim_uid, exim_gid, TRUE, US"privilege not needed"); |
| 4345 | } |
| 4346 | |
| 4347 | /* When we are retaining a privileged uid, we still change to the exim gid. */ |
| 4348 | |
| 4349 | else |
| 4350 | { |
| 4351 | int rv; |
| 4352 | rv = setgid(exim_gid); |
| 4353 | /* Impact of failure is that some stuff might end up with an incorrect group. |
| 4354 | We track this for failures from root, since any attempt to change privilege |
| 4355 | by root should succeed and failures should be examined. For non-root, |
| 4356 | there's no security risk. For me, it's { exim -bV } on a just-built binary, |
| 4357 | no need to complain then. */ |
| 4358 | if (rv == -1) |
| 4359 | { |
| 4360 | if (!(unprivileged || removed_privilege)) |
| 4361 | { |
| 4362 | fprintf(stderr, |
| 4363 | "exim: changing group failed: %s\n", strerror(errno)); |
| 4364 | exit(EXIT_FAILURE); |
| 4365 | } |
| 4366 | else |
| 4367 | DEBUG(D_any) debug_printf("changing group to %ld failed: %s\n", |
| 4368 | (long int)exim_gid, strerror(errno)); |
| 4369 | } |
| 4370 | } |
| 4371 | |
| 4372 | /* Handle a request to scan a file for malware */ |
| 4373 | if (malware_test_file) |
| 4374 | { |
| 4375 | #ifdef WITH_CONTENT_SCAN |
| 4376 | int result; |
| 4377 | set_process_info("scanning file for malware"); |
| 4378 | result = malware_in_file(malware_test_file); |
| 4379 | if (result == FAIL) |
| 4380 | { |
| 4381 | printf("No malware found.\n"); |
| 4382 | exit(EXIT_SUCCESS); |
| 4383 | } |
| 4384 | if (result != OK) |
| 4385 | { |
| 4386 | printf("Malware lookup returned non-okay/fail: %d\n", result); |
| 4387 | exit(EXIT_FAILURE); |
| 4388 | } |
| 4389 | if (malware_name) |
| 4390 | printf("Malware found: %s\n", malware_name); |
| 4391 | else |
| 4392 | printf("Malware scan detected malware of unknown name.\n"); |
| 4393 | #else |
| 4394 | printf("Malware scanning not enabled at compile time.\n"); |
| 4395 | #endif |
| 4396 | exit(EXIT_FAILURE); |
| 4397 | } |
| 4398 | |
| 4399 | /* Handle a request to list the delivery queue */ |
| 4400 | |
| 4401 | if (list_queue) |
| 4402 | { |
| 4403 | set_process_info("listing the queue"); |
| 4404 | queue_list(list_queue_option, argv + recipients_arg, argc - recipients_arg); |
| 4405 | exit(EXIT_SUCCESS); |
| 4406 | } |
| 4407 | |
| 4408 | /* Handle a request to count the delivery queue */ |
| 4409 | |
| 4410 | if (count_queue) |
| 4411 | { |
| 4412 | set_process_info("counting the queue"); |
| 4413 | queue_count(); |
| 4414 | exit(EXIT_SUCCESS); |
| 4415 | } |
| 4416 | |
| 4417 | /* Handle actions on specific messages, except for the force delivery and |
| 4418 | message load actions, which are done below. Some actions take a whole list of |
| 4419 | message ids, which are known to continue up to the end of the arguments. Others |
| 4420 | take a single message id and then operate on the recipients list. */ |
| 4421 | |
| 4422 | if (msg_action_arg > 0 && msg_action != MSG_DELIVER && msg_action != MSG_LOAD) |
| 4423 | { |
| 4424 | int yield = EXIT_SUCCESS; |
| 4425 | set_process_info("acting on specified messages"); |
| 4426 | |
| 4427 | if (!one_msg_action) |
| 4428 | { |
| 4429 | for (i = msg_action_arg; i < argc; i++) |
| 4430 | if (!queue_action(argv[i], msg_action, NULL, 0, 0)) |
| 4431 | yield = EXIT_FAILURE; |
| 4432 | } |
| 4433 | |
| 4434 | else if (!queue_action(argv[msg_action_arg], msg_action, argv, argc, |
| 4435 | recipients_arg)) yield = EXIT_FAILURE; |
| 4436 | exit(yield); |
| 4437 | } |
| 4438 | |
| 4439 | /* We used to set up here to skip reading the ACL section, on |
| 4440 | (msg_action_arg > 0 || (queue_interval == 0 && !daemon_listen) |
| 4441 | Now, since the intro of the ${acl } expansion, ACL definitions may be |
| 4442 | needed in transports so we lost the optimisation. */ |
| 4443 | |
| 4444 | readconf_rest(); |
| 4445 | |
| 4446 | /* The configuration data will have been read into POOL_PERM because we won't |
| 4447 | ever want to reset back past it. Change the current pool to POOL_MAIN. In fact, |
| 4448 | this is just a bit of pedantic tidiness. It wouldn't really matter if the |
| 4449 | configuration were read into POOL_MAIN, because we don't do any resets till |
| 4450 | later on. However, it seems right, and it does ensure that both pools get used. |
| 4451 | */ |
| 4452 | |
| 4453 | store_pool = POOL_MAIN; |
| 4454 | |
| 4455 | /* Handle the -brt option. This is for checking out retry configurations. |
| 4456 | The next three arguments are a domain name or a complete address, and |
| 4457 | optionally two error numbers. All it does is to call the function that |
| 4458 | scans the retry configuration data. */ |
| 4459 | |
| 4460 | if (test_retry_arg >= 0) |
| 4461 | { |
| 4462 | retry_config *yield; |
| 4463 | int basic_errno = 0; |
| 4464 | int more_errno = 0; |
| 4465 | uschar *s1, *s2; |
| 4466 | |
| 4467 | if (test_retry_arg >= argc) |
| 4468 | { |
| 4469 | printf("-brt needs a domain or address argument\n"); |
| 4470 | exim_exit(EXIT_FAILURE); |
| 4471 | } |
| 4472 | s1 = argv[test_retry_arg++]; |
| 4473 | s2 = NULL; |
| 4474 | |
| 4475 | /* If the first argument contains no @ and no . it might be a local user |
| 4476 | or it might be a single-component name. Treat as a domain. */ |
| 4477 | |
| 4478 | if (Ustrchr(s1, '@') == NULL && Ustrchr(s1, '.') == NULL) |
| 4479 | { |
| 4480 | printf("Warning: \"%s\" contains no '@' and no '.' characters. It is " |
| 4481 | "being \ntreated as a one-component domain, not as a local part.\n\n", |
| 4482 | s1); |
| 4483 | } |
| 4484 | |
| 4485 | /* There may be an optional second domain arg. */ |
| 4486 | |
| 4487 | if (test_retry_arg < argc && Ustrchr(argv[test_retry_arg], '.') != NULL) |
| 4488 | s2 = argv[test_retry_arg++]; |
| 4489 | |
| 4490 | /* The final arg is an error name */ |
| 4491 | |
| 4492 | if (test_retry_arg < argc) |
| 4493 | { |
| 4494 | uschar *ss = argv[test_retry_arg]; |
| 4495 | uschar *error = |
| 4496 | readconf_retry_error(ss, ss + Ustrlen(ss), &basic_errno, &more_errno); |
| 4497 | if (error != NULL) |
| 4498 | { |
| 4499 | printf("%s\n", CS error); |
| 4500 | return EXIT_FAILURE; |
| 4501 | } |
| 4502 | |
| 4503 | /* For the {MAIL,RCPT,DATA}_4xx errors, a value of 255 means "any", and a |
| 4504 | code > 100 as an error is for matching codes to the decade. Turn them into |
| 4505 | a real error code, off the decade. */ |
| 4506 | |
| 4507 | if (basic_errno == ERRNO_MAIL4XX || |
| 4508 | basic_errno == ERRNO_RCPT4XX || |
| 4509 | basic_errno == ERRNO_DATA4XX) |
| 4510 | { |
| 4511 | int code = (more_errno >> 8) & 255; |
| 4512 | if (code == 255) |
| 4513 | more_errno = (more_errno & 0xffff00ff) | (21 << 8); |
| 4514 | else if (code > 100) |
| 4515 | more_errno = (more_errno & 0xffff00ff) | ((code - 96) << 8); |
| 4516 | } |
| 4517 | } |
| 4518 | |
| 4519 | yield = retry_find_config(s1, s2, basic_errno, more_errno); |
| 4520 | if (yield == NULL) printf("No retry information found\n"); else |
| 4521 | { |
| 4522 | retry_rule *r; |
| 4523 | more_errno = yield->more_errno; |
| 4524 | printf("Retry rule: %s ", yield->pattern); |
| 4525 | |
| 4526 | if (yield->basic_errno == ERRNO_EXIMQUOTA) |
| 4527 | { |
| 4528 | printf("quota%s%s ", |
| 4529 | (more_errno > 0)? "_" : "", |
| 4530 | (more_errno > 0)? readconf_printtime(more_errno) : US""); |
| 4531 | } |
| 4532 | else if (yield->basic_errno == ECONNREFUSED) |
| 4533 | { |
| 4534 | printf("refused%s%s ", |
| 4535 | (more_errno > 0)? "_" : "", |
| 4536 | (more_errno == 'M')? "MX" : |
| 4537 | (more_errno == 'A')? "A" : ""); |
| 4538 | } |
| 4539 | else if (yield->basic_errno == ETIMEDOUT) |
| 4540 | { |
| 4541 | printf("timeout"); |
| 4542 | if ((more_errno & RTEF_CTOUT) != 0) printf("_connect"); |
| 4543 | more_errno &= 255; |
| 4544 | if (more_errno != 0) printf("_%s", |
| 4545 | (more_errno == 'M')? "MX" : "A"); |
| 4546 | printf(" "); |
| 4547 | } |
| 4548 | else if (yield->basic_errno == ERRNO_AUTHFAIL) |
| 4549 | printf("auth_failed "); |
| 4550 | else printf("* "); |
| 4551 | |
| 4552 | for (r = yield->rules; r != NULL; r = r->next) |
| 4553 | { |
| 4554 | printf("%c,%s", r->rule, readconf_printtime(r->timeout)); /* Do not */ |
| 4555 | printf(",%s", readconf_printtime(r->p1)); /* amalgamate */ |
| 4556 | if (r->rule == 'G') |
| 4557 | { |
| 4558 | int x = r->p2; |
| 4559 | int f = x % 1000; |
| 4560 | int d = 100; |
| 4561 | printf(",%d.", x/1000); |
| 4562 | do |
| 4563 | { |
| 4564 | printf("%d", f/d); |
| 4565 | f %= d; |
| 4566 | d /= 10; |
| 4567 | } |
| 4568 | while (f != 0); |
| 4569 | } |
| 4570 | printf("; "); |
| 4571 | } |
| 4572 | |
| 4573 | printf("\n"); |
| 4574 | } |
| 4575 | exim_exit(EXIT_SUCCESS); |
| 4576 | } |
| 4577 | |
| 4578 | /* Handle a request to list one or more configuration options */ |
| 4579 | /* If -n was set, we suppress some information */ |
| 4580 | |
| 4581 | if (list_options) |
| 4582 | { |
| 4583 | set_process_info("listing variables"); |
| 4584 | if (recipients_arg >= argc) readconf_print(US"all", NULL, flag_n); |
| 4585 | else for (i = recipients_arg; i < argc; i++) |
| 4586 | { |
| 4587 | if (i < argc - 1 && |
| 4588 | (Ustrcmp(argv[i], "router") == 0 || |
| 4589 | Ustrcmp(argv[i], "transport") == 0 || |
| 4590 | Ustrcmp(argv[i], "authenticator") == 0 || |
| 4591 | Ustrcmp(argv[i], "macro") == 0 || |
| 4592 | Ustrcmp(argv[i], "environment") == 0)) |
| 4593 | { |
| 4594 | readconf_print(argv[i+1], argv[i], flag_n); |
| 4595 | i++; |
| 4596 | } |
| 4597 | else readconf_print(argv[i], NULL, flag_n); |
| 4598 | } |
| 4599 | exim_exit(EXIT_SUCCESS); |
| 4600 | } |
| 4601 | |
| 4602 | if (list_config) |
| 4603 | { |
| 4604 | set_process_info("listing config"); |
| 4605 | readconf_print(US"config", NULL, flag_n); |
| 4606 | exim_exit(EXIT_SUCCESS); |
| 4607 | } |
| 4608 | |
| 4609 | |
| 4610 | /* Initialise subsystems as required */ |
| 4611 | #ifndef DISABLE_DKIM |
| 4612 | dkim_exim_init(); |
| 4613 | #endif |
| 4614 | deliver_init(); |
| 4615 | |
| 4616 | |
| 4617 | /* Handle a request to deliver one or more messages that are already on the |
| 4618 | queue. Values of msg_action other than MSG_DELIVER and MSG_LOAD are dealt with |
| 4619 | above. MSG_LOAD is handled with -be (which is the only time it applies) below. |
| 4620 | |
| 4621 | Delivery of specific messages is typically used for a small number when |
| 4622 | prodding by hand (when the option forced_delivery will be set) or when |
| 4623 | re-execing to regain root privilege. Each message delivery must happen in a |
| 4624 | separate process, so we fork a process for each one, and run them sequentially |
| 4625 | so that debugging output doesn't get intertwined, and to avoid spawning too |
| 4626 | many processes if a long list is given. However, don't fork for the last one; |
| 4627 | this saves a process in the common case when Exim is called to deliver just one |
| 4628 | message. */ |
| 4629 | |
| 4630 | if (msg_action_arg > 0 && msg_action != MSG_LOAD) |
| 4631 | { |
| 4632 | if (prod_requires_admin && !admin_user) |
| 4633 | { |
| 4634 | fprintf(stderr, "exim: Permission denied\n"); |
| 4635 | exim_exit(EXIT_FAILURE); |
| 4636 | } |
| 4637 | set_process_info("delivering specified messages"); |
| 4638 | if (deliver_give_up) forced_delivery = deliver_force_thaw = TRUE; |
| 4639 | for (i = msg_action_arg; i < argc; i++) |
| 4640 | { |
| 4641 | int status; |
| 4642 | pid_t pid; |
| 4643 | if (i == argc - 1) |
| 4644 | (void)deliver_message(argv[i], forced_delivery, deliver_give_up); |
| 4645 | else if ((pid = fork()) == 0) |
| 4646 | { |
| 4647 | (void)deliver_message(argv[i], forced_delivery, deliver_give_up); |
| 4648 | _exit(EXIT_SUCCESS); |
| 4649 | } |
| 4650 | else if (pid < 0) |
| 4651 | { |
| 4652 | fprintf(stderr, "failed to fork delivery process for %s: %s\n", argv[i], |
| 4653 | strerror(errno)); |
| 4654 | exim_exit(EXIT_FAILURE); |
| 4655 | } |
| 4656 | else wait(&status); |
| 4657 | } |
| 4658 | exim_exit(EXIT_SUCCESS); |
| 4659 | } |
| 4660 | |
| 4661 | |
| 4662 | /* If only a single queue run is requested, without SMTP listening, we can just |
| 4663 | turn into a queue runner, with an optional starting message id. */ |
| 4664 | |
| 4665 | if (queue_interval == 0 && !daemon_listen) |
| 4666 | { |
| 4667 | DEBUG(D_queue_run) debug_printf("Single queue run%s%s%s%s\n", |
| 4668 | (start_queue_run_id == NULL)? US"" : US" starting at ", |
| 4669 | (start_queue_run_id == NULL)? US"" : start_queue_run_id, |
| 4670 | (stop_queue_run_id == NULL)? US"" : US" stopping at ", |
| 4671 | (stop_queue_run_id == NULL)? US"" : stop_queue_run_id); |
| 4672 | if (*queue_name) |
| 4673 | set_process_info("running the '%s' queue (single queue run)", queue_name); |
| 4674 | else |
| 4675 | set_process_info("running the queue (single queue run)"); |
| 4676 | queue_run(start_queue_run_id, stop_queue_run_id, FALSE); |
| 4677 | exim_exit(EXIT_SUCCESS); |
| 4678 | } |
| 4679 | |
| 4680 | |
| 4681 | /* Find the login name of the real user running this process. This is always |
| 4682 | needed when receiving a message, because it is written into the spool file. It |
| 4683 | may also be used to construct a from: or a sender: header, and in this case we |
| 4684 | need the user's full name as well, so save a copy of it, checked for RFC822 |
| 4685 | syntax and munged if necessary, if it hasn't previously been set by the -F |
| 4686 | argument. We may try to get the passwd entry more than once, in case NIS or |
| 4687 | other delays are in evidence. Save the home directory for use in filter testing |
| 4688 | (only). */ |
| 4689 | |
| 4690 | for (i = 0;;) |
| 4691 | { |
| 4692 | if ((pw = getpwuid(real_uid)) != NULL) |
| 4693 | { |
| 4694 | originator_login = string_copy(US pw->pw_name); |
| 4695 | originator_home = string_copy(US pw->pw_dir); |
| 4696 | |
| 4697 | /* If user name has not been set by -F, set it from the passwd entry |
| 4698 | unless -f has been used to set the sender address by a trusted user. */ |
| 4699 | |
| 4700 | if (originator_name == NULL) |
| 4701 | { |
| 4702 | if (sender_address == NULL || |
| 4703 | (!trusted_caller && filter_test == FTEST_NONE)) |
| 4704 | { |
| 4705 | uschar *name = US pw->pw_gecos; |
| 4706 | uschar *amp = Ustrchr(name, '&'); |
| 4707 | uschar buffer[256]; |
| 4708 | |
| 4709 | /* Most Unix specify that a '&' character in the gecos field is |
| 4710 | replaced by a copy of the login name, and some even specify that |
| 4711 | the first character should be upper cased, so that's what we do. */ |
| 4712 | |
| 4713 | if (amp != NULL) |
| 4714 | { |
| 4715 | int loffset; |
| 4716 | string_format(buffer, sizeof(buffer), "%.*s%n%s%s", |
| 4717 | amp - name, name, &loffset, originator_login, amp + 1); |
| 4718 | buffer[loffset] = toupper(buffer[loffset]); |
| 4719 | name = buffer; |
| 4720 | } |
| 4721 | |
| 4722 | /* If a pattern for matching the gecos field was supplied, apply |
| 4723 | it and then expand the name string. */ |
| 4724 | |
| 4725 | if (gecos_pattern != NULL && gecos_name != NULL) |
| 4726 | { |
| 4727 | const pcre *re; |
| 4728 | re = regex_must_compile(gecos_pattern, FALSE, TRUE); /* Use malloc */ |
| 4729 | |
| 4730 | if (regex_match_and_setup(re, name, 0, -1)) |
| 4731 | { |
| 4732 | uschar *new_name = expand_string(gecos_name); |
| 4733 | expand_nmax = -1; |
| 4734 | if (new_name != NULL) |
| 4735 | { |
| 4736 | DEBUG(D_receive) debug_printf("user name \"%s\" extracted from " |
| 4737 | "gecos field \"%s\"\n", new_name, name); |
| 4738 | name = new_name; |
| 4739 | } |
| 4740 | else DEBUG(D_receive) debug_printf("failed to expand gecos_name string " |
| 4741 | "\"%s\": %s\n", gecos_name, expand_string_message); |
| 4742 | } |
| 4743 | else DEBUG(D_receive) debug_printf("gecos_pattern \"%s\" did not match " |
| 4744 | "gecos field \"%s\"\n", gecos_pattern, name); |
| 4745 | store_free((void *)re); |
| 4746 | } |
| 4747 | originator_name = string_copy(name); |
| 4748 | } |
| 4749 | |
| 4750 | /* A trusted caller has used -f but not -F */ |
| 4751 | |
| 4752 | else originator_name = US""; |
| 4753 | } |
| 4754 | |
| 4755 | /* Break the retry loop */ |
| 4756 | |
| 4757 | break; |
| 4758 | } |
| 4759 | |
| 4760 | if (++i > finduser_retries) break; |
| 4761 | sleep(1); |
| 4762 | } |
| 4763 | |
| 4764 | /* If we cannot get a user login, log the incident and give up, unless the |
| 4765 | configuration specifies something to use. When running in the test harness, |
| 4766 | any setting of unknown_login overrides the actual name. */ |
| 4767 | |
| 4768 | if (originator_login == NULL || running_in_test_harness) |
| 4769 | { |
| 4770 | if (unknown_login != NULL) |
| 4771 | { |
| 4772 | originator_login = expand_string(unknown_login); |
| 4773 | if (originator_name == NULL && unknown_username != NULL) |
| 4774 | originator_name = expand_string(unknown_username); |
| 4775 | if (originator_name == NULL) originator_name = US""; |
| 4776 | } |
| 4777 | if (originator_login == NULL) |
| 4778 | log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Failed to get user name for uid %d", |
| 4779 | (int)real_uid); |
| 4780 | } |
| 4781 | |
| 4782 | /* Ensure that the user name is in a suitable form for use as a "phrase" in an |
| 4783 | RFC822 address.*/ |
| 4784 | |
| 4785 | originator_name = string_copy(parse_fix_phrase(originator_name, |
| 4786 | Ustrlen(originator_name), big_buffer, big_buffer_size)); |
| 4787 | |
| 4788 | /* If a message is created by this call of Exim, the uid/gid of its originator |
| 4789 | are those of the caller. These values are overridden if an existing message is |
| 4790 | read in from the spool. */ |
| 4791 | |
| 4792 | originator_uid = real_uid; |
| 4793 | originator_gid = real_gid; |
| 4794 | |
| 4795 | DEBUG(D_receive) debug_printf("originator: uid=%d gid=%d login=%s name=%s\n", |
| 4796 | (int)originator_uid, (int)originator_gid, originator_login, originator_name); |
| 4797 | |
| 4798 | /* Run in daemon and/or queue-running mode. The function daemon_go() never |
| 4799 | returns. We leave this till here so that the originator_ fields are available |
| 4800 | for incoming messages via the daemon. The daemon cannot be run in mua_wrapper |
| 4801 | mode. */ |
| 4802 | |
| 4803 | if (daemon_listen || inetd_wait_mode || queue_interval > 0) |
| 4804 | { |
| 4805 | if (mua_wrapper) |
| 4806 | { |
| 4807 | fprintf(stderr, "Daemon cannot be run when mua_wrapper is set\n"); |
| 4808 | log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Daemon cannot be run when " |
| 4809 | "mua_wrapper is set"); |
| 4810 | } |
| 4811 | daemon_go(); |
| 4812 | } |
| 4813 | |
| 4814 | /* If the sender ident has not been set (by a trusted caller) set it to |
| 4815 | the caller. This will get overwritten below for an inetd call. If a trusted |
| 4816 | caller has set it empty, unset it. */ |
| 4817 | |
| 4818 | if (sender_ident == NULL) sender_ident = originator_login; |
| 4819 | else if (sender_ident[0] == 0) sender_ident = NULL; |
| 4820 | |
| 4821 | /* Handle the -brw option, which is for checking out rewriting rules. Cause log |
| 4822 | writes (on errors) to go to stderr instead. Can't do this earlier, as want the |
| 4823 | originator_* variables set. */ |
| 4824 | |
| 4825 | if (test_rewrite_arg >= 0) |
| 4826 | { |
| 4827 | really_exim = FALSE; |
| 4828 | if (test_rewrite_arg >= argc) |
| 4829 | { |
| 4830 | printf("-brw needs an address argument\n"); |
| 4831 | exim_exit(EXIT_FAILURE); |
| 4832 | } |
| 4833 | rewrite_test(argv[test_rewrite_arg]); |
| 4834 | exim_exit(EXIT_SUCCESS); |
| 4835 | } |
| 4836 | |
| 4837 | /* A locally-supplied message is considered to be coming from a local user |
| 4838 | unless a trusted caller supplies a sender address with -f, or is passing in the |
| 4839 | message via SMTP (inetd invocation or otherwise). */ |
| 4840 | |
| 4841 | if ((sender_address == NULL && !smtp_input) || |
| 4842 | (!trusted_caller && filter_test == FTEST_NONE)) |
| 4843 | { |
| 4844 | sender_local = TRUE; |
| 4845 | |
| 4846 | /* A trusted caller can supply authenticated_sender and authenticated_id |
| 4847 | via -oMas and -oMai and if so, they will already be set. Otherwise, force |
| 4848 | defaults except when host checking. */ |
| 4849 | |
| 4850 | if (authenticated_sender == NULL && !host_checking) |
| 4851 | authenticated_sender = string_sprintf("%s@%s", originator_login, |
| 4852 | qualify_domain_sender); |
| 4853 | if (authenticated_id == NULL && !host_checking) |
| 4854 | authenticated_id = originator_login; |
| 4855 | } |
| 4856 | |
| 4857 | /* Trusted callers are always permitted to specify the sender address. |
| 4858 | Untrusted callers may specify it if it matches untrusted_set_sender, or if what |
| 4859 | is specified is the empty address. However, if a trusted caller does not |
| 4860 | specify a sender address for SMTP input, we leave sender_address unset. This |
| 4861 | causes the MAIL commands to be honoured. */ |
| 4862 | |
| 4863 | if ((!smtp_input && sender_address == NULL) || |
| 4864 | !receive_check_set_sender(sender_address)) |
| 4865 | { |
| 4866 | /* Either the caller is not permitted to set a general sender, or this is |
| 4867 | non-SMTP input and the trusted caller has not set a sender. If there is no |
| 4868 | sender, or if a sender other than <> is set, override with the originator's |
| 4869 | login (which will get qualified below), except when checking things. */ |
| 4870 | |
| 4871 | if (sender_address == NULL /* No sender_address set */ |
| 4872 | || /* OR */ |
| 4873 | (sender_address[0] != 0 && /* Non-empty sender address, AND */ |
| 4874 | !checking)) /* Not running tests, including filter tests */ |
| 4875 | { |
| 4876 | sender_address = originator_login; |
| 4877 | sender_address_forced = FALSE; |
| 4878 | sender_address_domain = 0; |
| 4879 | } |
| 4880 | } |
| 4881 | |
| 4882 | /* Remember whether an untrusted caller set the sender address */ |
| 4883 | |
| 4884 | sender_set_untrusted = sender_address != originator_login && !trusted_caller; |
| 4885 | |
| 4886 | /* Ensure that the sender address is fully qualified unless it is the empty |
| 4887 | address, which indicates an error message, or doesn't exist (root caller, smtp |
| 4888 | interface, no -f argument). */ |
| 4889 | |
| 4890 | if (sender_address != NULL && sender_address[0] != 0 && |
| 4891 | sender_address_domain == 0) |
| 4892 | sender_address = string_sprintf("%s@%s", local_part_quote(sender_address), |
| 4893 | qualify_domain_sender); |
| 4894 | |
| 4895 | DEBUG(D_receive) debug_printf("sender address = %s\n", sender_address); |
| 4896 | |
| 4897 | /* Handle a request to verify a list of addresses, or test them for delivery. |
| 4898 | This must follow the setting of the sender address, since routers can be |
| 4899 | predicated upon the sender. If no arguments are given, read addresses from |
| 4900 | stdin. Set debug_level to at least D_v to get full output for address testing. |
| 4901 | */ |
| 4902 | |
| 4903 | if (verify_address_mode || address_test_mode) |
| 4904 | { |
| 4905 | int exit_value = 0; |
| 4906 | int flags = vopt_qualify; |
| 4907 | |
| 4908 | if (verify_address_mode) |
| 4909 | { |
| 4910 | if (!verify_as_sender) flags |= vopt_is_recipient; |
| 4911 | DEBUG(D_verify) debug_print_ids(US"Verifying:"); |
| 4912 | } |
| 4913 | |
| 4914 | else |
| 4915 | { |
| 4916 | flags |= vopt_is_recipient; |
| 4917 | debug_selector |= D_v; |
| 4918 | debug_file = stderr; |
| 4919 | debug_fd = fileno(debug_file); |
| 4920 | DEBUG(D_verify) debug_print_ids(US"Address testing:"); |
| 4921 | } |
| 4922 | |
| 4923 | if (recipients_arg < argc) |
| 4924 | { |
| 4925 | while (recipients_arg < argc) |
| 4926 | { |
| 4927 | uschar *s = argv[recipients_arg++]; |
| 4928 | while (*s != 0) |
| 4929 | { |
| 4930 | BOOL finished = FALSE; |
| 4931 | uschar *ss = parse_find_address_end(s, FALSE); |
| 4932 | if (*ss == ',') *ss = 0; else finished = TRUE; |
| 4933 | test_address(s, flags, &exit_value); |
| 4934 | s = ss; |
| 4935 | if (!finished) |
| 4936 | while (*(++s) != 0 && (*s == ',' || isspace(*s))); |
| 4937 | } |
| 4938 | } |
| 4939 | } |
| 4940 | |
| 4941 | else for (;;) |
| 4942 | { |
| 4943 | uschar *s = get_stdinput(NULL, NULL); |
| 4944 | if (s == NULL) break; |
| 4945 | test_address(s, flags, &exit_value); |
| 4946 | } |
| 4947 | |
| 4948 | route_tidyup(); |
| 4949 | exim_exit(exit_value); |
| 4950 | } |
| 4951 | |
| 4952 | /* Handle expansion checking. Either expand items on the command line, or read |
| 4953 | from stdin if there aren't any. If -Mset was specified, load the message so |
| 4954 | that its variables can be used, but restrict this facility to admin users. |
| 4955 | Otherwise, if -bem was used, read a message from stdin. */ |
| 4956 | |
| 4957 | if (expansion_test) |
| 4958 | { |
| 4959 | dns_init(FALSE, FALSE, FALSE); |
| 4960 | if (msg_action_arg > 0 && msg_action == MSG_LOAD) |
| 4961 | { |
| 4962 | uschar spoolname[256]; /* Not big_buffer; used in spool_read_header() */ |
| 4963 | if (!admin_user) |
| 4964 | { |
| 4965 | fprintf(stderr, "exim: permission denied\n"); |
| 4966 | exit(EXIT_FAILURE); |
| 4967 | } |
| 4968 | message_id = argv[msg_action_arg]; |
| 4969 | (void)string_format(spoolname, sizeof(spoolname), "%s-H", message_id); |
| 4970 | if ((deliver_datafile = spool_open_datafile(message_id)) < 0) |
| 4971 | printf ("Failed to load message datafile %s\n", message_id); |
| 4972 | if (spool_read_header(spoolname, TRUE, FALSE) != spool_read_OK) |
| 4973 | printf ("Failed to load message %s\n", message_id); |
| 4974 | } |
| 4975 | |
| 4976 | /* Read a test message from a file. We fudge it up to be on stdin, saving |
| 4977 | stdin itself for later reading of expansion strings. */ |
| 4978 | |
| 4979 | else if (expansion_test_message != NULL) |
| 4980 | { |
| 4981 | int save_stdin = dup(0); |
| 4982 | int fd = Uopen(expansion_test_message, O_RDONLY, 0); |
| 4983 | if (fd < 0) |
| 4984 | { |
| 4985 | fprintf(stderr, "exim: failed to open %s: %s\n", expansion_test_message, |
| 4986 | strerror(errno)); |
| 4987 | return EXIT_FAILURE; |
| 4988 | } |
| 4989 | (void) dup2(fd, 0); |
| 4990 | filter_test = FTEST_USER; /* Fudge to make it look like filter test */ |
| 4991 | message_ended = END_NOTENDED; |
| 4992 | read_message_body(receive_msg(extract_recipients)); |
| 4993 | message_linecount += body_linecount; |
| 4994 | (void)dup2(save_stdin, 0); |
| 4995 | (void)close(save_stdin); |
| 4996 | clearerr(stdin); /* Required by Darwin */ |
| 4997 | } |
| 4998 | |
| 4999 | /* Allow $recipients for this testing */ |
| 5000 | |
| 5001 | enable_dollar_recipients = TRUE; |
| 5002 | |
| 5003 | /* Expand command line items */ |
| 5004 | |
| 5005 | if (recipients_arg < argc) |
| 5006 | { |
| 5007 | while (recipients_arg < argc) |
| 5008 | { |
| 5009 | uschar *s = argv[recipients_arg++]; |
| 5010 | uschar *ss = expand_string(s); |
| 5011 | if (ss == NULL) printf ("Failed: %s\n", expand_string_message); |
| 5012 | else printf("%s\n", CS ss); |
| 5013 | } |
| 5014 | } |
| 5015 | |
| 5016 | /* Read stdin */ |
| 5017 | |
| 5018 | else |
| 5019 | { |
| 5020 | char *(*fn_readline)(const char *) = NULL; |
| 5021 | void (*fn_addhist)(const char *) = NULL; |
| 5022 | |
| 5023 | #ifdef USE_READLINE |
| 5024 | void *dlhandle = set_readline(&fn_readline, &fn_addhist); |
| 5025 | #endif |
| 5026 | |
| 5027 | for (;;) |
| 5028 | { |
| 5029 | uschar *ss; |
| 5030 | uschar *source = get_stdinput(fn_readline, fn_addhist); |
| 5031 | if (source == NULL) break; |
| 5032 | ss = expand_string(source); |
| 5033 | if (ss == NULL) |
| 5034 | printf ("Failed: %s\n", expand_string_message); |
| 5035 | else printf("%s\n", CS ss); |
| 5036 | } |
| 5037 | |
| 5038 | #ifdef USE_READLINE |
| 5039 | if (dlhandle != NULL) dlclose(dlhandle); |
| 5040 | #endif |
| 5041 | } |
| 5042 | |
| 5043 | /* The data file will be open after -Mset */ |
| 5044 | |
| 5045 | if (deliver_datafile >= 0) |
| 5046 | { |
| 5047 | (void)close(deliver_datafile); |
| 5048 | deliver_datafile = -1; |
| 5049 | } |
| 5050 | |
| 5051 | exim_exit(EXIT_SUCCESS); |
| 5052 | } |
| 5053 | |
| 5054 | |
| 5055 | /* The active host name is normally the primary host name, but it can be varied |
| 5056 | for hosts that want to play several parts at once. We need to ensure that it is |
| 5057 | set for host checking, and for receiving messages. */ |
| 5058 | |
| 5059 | smtp_active_hostname = primary_hostname; |
| 5060 | if (raw_active_hostname != NULL) |
| 5061 | { |
| 5062 | uschar *nah = expand_string(raw_active_hostname); |
| 5063 | if (nah == NULL) |
| 5064 | { |
| 5065 | if (!expand_string_forcedfail) |
| 5066 | log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to expand \"%s\" " |
| 5067 | "(smtp_active_hostname): %s", raw_active_hostname, |
| 5068 | expand_string_message); |
| 5069 | } |
| 5070 | else if (nah[0] != 0) smtp_active_hostname = nah; |
| 5071 | } |
| 5072 | |
| 5073 | /* Handle host checking: this facility mocks up an incoming SMTP call from a |
| 5074 | given IP address so that the blocking and relay configuration can be tested. |
| 5075 | Unless a sender_ident was set by -oMt, we discard it (the default is the |
| 5076 | caller's login name). An RFC 1413 call is made only if we are running in the |
| 5077 | test harness and an incoming interface and both ports are specified, because |
| 5078 | there is no TCP/IP call to find the ident for. */ |
| 5079 | |
| 5080 | if (host_checking) |
| 5081 | { |
| 5082 | int x[4]; |
| 5083 | int size; |
| 5084 | |
| 5085 | if (!sender_ident_set) |
| 5086 | { |
| 5087 | sender_ident = NULL; |
| 5088 | if (running_in_test_harness && sender_host_port != 0 && |
| 5089 | interface_address != NULL && interface_port != 0) |
| 5090 | verify_get_ident(1413); |
| 5091 | } |
| 5092 | |
| 5093 | /* In case the given address is a non-canonical IPv6 address, canonicize |
| 5094 | it. The code works for both IPv4 and IPv6, as it happens. */ |
| 5095 | |
| 5096 | size = host_aton(sender_host_address, x); |
| 5097 | sender_host_address = store_get(48); /* large enough for full IPv6 */ |
| 5098 | (void)host_nmtoa(size, x, -1, sender_host_address, ':'); |
| 5099 | |
| 5100 | /* Now set up for testing */ |
| 5101 | |
| 5102 | host_build_sender_fullhost(); |
| 5103 | smtp_input = TRUE; |
| 5104 | smtp_in = stdin; |
| 5105 | smtp_out = stdout; |
| 5106 | sender_local = FALSE; |
| 5107 | sender_host_notsocket = TRUE; |
| 5108 | debug_file = stderr; |
| 5109 | debug_fd = fileno(debug_file); |
| 5110 | fprintf(stdout, "\n**** SMTP testing session as if from host %s\n" |
| 5111 | "**** but without any ident (RFC 1413) callback.\n" |
| 5112 | "**** This is not for real!\n\n", |
| 5113 | sender_host_address); |
| 5114 | |
| 5115 | memset(sender_host_cache, 0, sizeof(sender_host_cache)); |
| 5116 | if (verify_check_host(&hosts_connection_nolog) == OK) |
| 5117 | BIT_CLEAR(log_selector, log_selector_size, Li_smtp_connection); |
| 5118 | log_write(L_smtp_connection, LOG_MAIN, "%s", smtp_get_connection_info()); |
| 5119 | |
| 5120 | /* NOTE: We do *not* call smtp_log_no_mail() if smtp_start_session() fails, |
| 5121 | because a log line has already been written for all its failure exists |
| 5122 | (usually "connection refused: <reason>") and writing another one is |
| 5123 | unnecessary clutter. */ |
| 5124 | |
| 5125 | if (smtp_start_session()) |
| 5126 | { |
| 5127 | reset_point = store_get(0); |
| 5128 | for (;;) |
| 5129 | { |
| 5130 | store_reset(reset_point); |
| 5131 | if (smtp_setup_msg() <= 0) break; |
| 5132 | if (!receive_msg(FALSE)) break; |
| 5133 | } |
| 5134 | smtp_log_no_mail(); |
| 5135 | } |
| 5136 | exim_exit(EXIT_SUCCESS); |
| 5137 | } |
| 5138 | |
| 5139 | |
| 5140 | /* Arrange for message reception if recipients or SMTP were specified; |
| 5141 | otherwise complain unless a version print (-bV) happened or this is a filter |
| 5142 | verification test or info dump. |
| 5143 | In the former case, show the configuration file name. */ |
| 5144 | |
| 5145 | if (recipients_arg >= argc && !extract_recipients && !smtp_input) |
| 5146 | { |
| 5147 | if (version_printed) |
| 5148 | { |
| 5149 | printf("Configuration file is %s\n", config_main_filename); |
| 5150 | return EXIT_SUCCESS; |
| 5151 | } |
| 5152 | |
| 5153 | if (info_flag != CMDINFO_NONE) |
| 5154 | { |
| 5155 | show_exim_information(info_flag, info_stdout ? stdout : stderr); |
| 5156 | return info_stdout ? EXIT_SUCCESS : EXIT_FAILURE; |
| 5157 | } |
| 5158 | |
| 5159 | if (filter_test == FTEST_NONE) |
| 5160 | exim_usage(called_as); |
| 5161 | } |
| 5162 | |
| 5163 | |
| 5164 | /* If mua_wrapper is set, Exim is being used to turn an MUA that submits on the |
| 5165 | standard input into an MUA that submits to a smarthost over TCP/IP. We know |
| 5166 | that we are not called from inetd, because that is rejected above. The |
| 5167 | following configuration settings are forced here: |
| 5168 | |
| 5169 | (1) Synchronous delivery (-odi) |
| 5170 | (2) Errors to stderr (-oep == -oeq) |
| 5171 | (3) No parallel remote delivery |
| 5172 | (4) Unprivileged delivery |
| 5173 | |
| 5174 | We don't force overall queueing options because there are several of them; |
| 5175 | instead, queueing is avoided below when mua_wrapper is set. However, we do need |
| 5176 | to override any SMTP queueing. */ |
| 5177 | |
| 5178 | if (mua_wrapper) |
| 5179 | { |
| 5180 | synchronous_delivery = TRUE; |
| 5181 | arg_error_handling = ERRORS_STDERR; |
| 5182 | remote_max_parallel = 1; |
| 5183 | deliver_drop_privilege = TRUE; |
| 5184 | queue_smtp = FALSE; |
| 5185 | queue_smtp_domains = NULL; |
| 5186 | #ifdef SUPPORT_I18N |
| 5187 | message_utf8_downconvert = -1; /* convert-if-needed */ |
| 5188 | #endif |
| 5189 | } |
| 5190 | |
| 5191 | |
| 5192 | /* Prepare to accept one or more new messages on the standard input. When a |
| 5193 | message has been read, its id is returned in message_id[]. If doing immediate |
| 5194 | delivery, we fork a delivery process for each received message, except for the |
| 5195 | last one, where we can save a process switch. |
| 5196 | |
| 5197 | It is only in non-smtp mode that error_handling is allowed to be changed from |
| 5198 | its default of ERRORS_SENDER by argument. (Idle thought: are any of the |
| 5199 | sendmail error modes other than -oem ever actually used? Later: yes.) */ |
| 5200 | |
| 5201 | if (!smtp_input) error_handling = arg_error_handling; |
| 5202 | |
| 5203 | /* If this is an inetd call, ensure that stderr is closed to prevent panic |
| 5204 | logging being sent down the socket and make an identd call to get the |
| 5205 | sender_ident. */ |
| 5206 | |
| 5207 | else if (is_inetd) |
| 5208 | { |
| 5209 | (void)fclose(stderr); |
| 5210 | exim_nullstd(); /* Re-open to /dev/null */ |
| 5211 | verify_get_ident(IDENT_PORT); |
| 5212 | host_build_sender_fullhost(); |
| 5213 | set_process_info("handling incoming connection from %s via inetd", |
| 5214 | sender_fullhost); |
| 5215 | } |
| 5216 | |
| 5217 | /* If the sender host address has been set, build sender_fullhost if it hasn't |
| 5218 | already been done (which it will have been for inetd). This caters for the |
| 5219 | case when it is forced by -oMa. However, we must flag that it isn't a socket, |
| 5220 | so that the test for IP options is skipped for -bs input. */ |
| 5221 | |
| 5222 | if (sender_host_address != NULL && sender_fullhost == NULL) |
| 5223 | { |
| 5224 | host_build_sender_fullhost(); |
| 5225 | set_process_info("handling incoming connection from %s via -oMa", |
| 5226 | sender_fullhost); |
| 5227 | sender_host_notsocket = TRUE; |
| 5228 | } |
| 5229 | |
| 5230 | /* Otherwise, set the sender host as unknown except for inetd calls. This |
| 5231 | prevents host checking in the case of -bs not from inetd and also for -bS. */ |
| 5232 | |
| 5233 | else if (!is_inetd) sender_host_unknown = TRUE; |
| 5234 | |
| 5235 | /* If stdout does not exist, then dup stdin to stdout. This can happen |
| 5236 | if exim is started from inetd. In this case fd 0 will be set to the socket, |
| 5237 | but fd 1 will not be set. This also happens for passed SMTP channels. */ |
| 5238 | |
| 5239 | if (fstat(1, &statbuf) < 0) (void)dup2(0, 1); |
| 5240 | |
| 5241 | /* Set up the incoming protocol name and the state of the program. Root is |
| 5242 | allowed to force received protocol via the -oMr option above. If we have come |
| 5243 | via inetd, the process info has already been set up. We don't set |
| 5244 | received_protocol here for smtp input, as it varies according to |
| 5245 | batch/HELO/EHLO/AUTH/TLS. */ |
| 5246 | |
| 5247 | if (smtp_input) |
| 5248 | { |
| 5249 | if (!is_inetd) set_process_info("accepting a local %sSMTP message from <%s>", |
| 5250 | smtp_batched_input? "batched " : "", |
| 5251 | (sender_address!= NULL)? sender_address : originator_login); |
| 5252 | } |
| 5253 | else |
| 5254 | { |
| 5255 | if (received_protocol == NULL) |
| 5256 | received_protocol = string_sprintf("local%s", called_as); |
| 5257 | set_process_info("accepting a local non-SMTP message from <%s>", |
| 5258 | sender_address); |
| 5259 | } |
| 5260 | |
| 5261 | /* Initialize the session_local_queue-only flag (this will be ignored if |
| 5262 | mua_wrapper is set) */ |
| 5263 | |
| 5264 | queue_check_only(); |
| 5265 | session_local_queue_only = queue_only; |
| 5266 | |
| 5267 | /* For non-SMTP and for batched SMTP input, check that there is enough space on |
| 5268 | the spool if so configured. On failure, we must not attempt to send an error |
| 5269 | message! (For interactive SMTP, the check happens at MAIL FROM and an SMTP |
| 5270 | error code is given.) */ |
| 5271 | |
| 5272 | if ((!smtp_input || smtp_batched_input) && !receive_check_fs(0)) |
| 5273 | { |
| 5274 | fprintf(stderr, "exim: insufficient disk space\n"); |
| 5275 | return EXIT_FAILURE; |
| 5276 | } |
| 5277 | |
| 5278 | /* If this is smtp input of any kind, real or batched, handle the start of the |
| 5279 | SMTP session. |
| 5280 | |
| 5281 | NOTE: We do *not* call smtp_log_no_mail() if smtp_start_session() fails, |
| 5282 | because a log line has already been written for all its failure exists |
| 5283 | (usually "connection refused: <reason>") and writing another one is |
| 5284 | unnecessary clutter. */ |
| 5285 | |
| 5286 | if (smtp_input) |
| 5287 | { |
| 5288 | smtp_in = stdin; |
| 5289 | smtp_out = stdout; |
| 5290 | memset(sender_host_cache, 0, sizeof(sender_host_cache)); |
| 5291 | if (verify_check_host(&hosts_connection_nolog) == OK) |
| 5292 | BIT_CLEAR(log_selector, log_selector_size, Li_smtp_connection); |
| 5293 | log_write(L_smtp_connection, LOG_MAIN, "%s", smtp_get_connection_info()); |
| 5294 | if (!smtp_start_session()) |
| 5295 | { |
| 5296 | mac_smtp_fflush(); |
| 5297 | exim_exit(EXIT_SUCCESS); |
| 5298 | } |
| 5299 | } |
| 5300 | |
| 5301 | /* Otherwise, set up the input size limit here. */ |
| 5302 | |
| 5303 | else |
| 5304 | { |
| 5305 | thismessage_size_limit = expand_string_integer(message_size_limit, TRUE); |
| 5306 | if (expand_string_message != NULL) |
| 5307 | { |
| 5308 | if (thismessage_size_limit == -1) |
| 5309 | log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to expand " |
| 5310 | "message_size_limit: %s", expand_string_message); |
| 5311 | else |
| 5312 | log_write(0, LOG_MAIN|LOG_PANIC_DIE, "invalid value for " |
| 5313 | "message_size_limit: %s", expand_string_message); |
| 5314 | } |
| 5315 | } |
| 5316 | |
| 5317 | /* Loop for several messages when reading SMTP input. If we fork any child |
| 5318 | processes, we don't want to wait for them unless synchronous delivery is |
| 5319 | requested, so set SIGCHLD to SIG_IGN in that case. This is not necessarily the |
| 5320 | same as SIG_DFL, despite the fact that documentation often lists the default as |
| 5321 | "ignore". This is a confusing area. This is what I know: |
| 5322 | |
| 5323 | At least on some systems (e.g. Solaris), just setting SIG_IGN causes child |
| 5324 | processes that complete simply to go away without ever becoming defunct. You |
| 5325 | can't then wait for them - but we don't want to wait for them in the |
| 5326 | non-synchronous delivery case. However, this behaviour of SIG_IGN doesn't |
| 5327 | happen for all OS (e.g. *BSD is different). |
| 5328 | |
| 5329 | But that's not the end of the story. Some (many? all?) systems have the |
| 5330 | SA_NOCLDWAIT option for sigaction(). This requests the behaviour that Solaris |
| 5331 | has by default, so it seems that the difference is merely one of default |
| 5332 | (compare restarting vs non-restarting signals). |
| 5333 | |
| 5334 | To cover all cases, Exim sets SIG_IGN with SA_NOCLDWAIT here if it can. If not, |
| 5335 | it just sets SIG_IGN. To be on the safe side it also calls waitpid() at the end |
| 5336 | of the loop below. Paranoia rules. |
| 5337 | |
| 5338 | February 2003: That's *still* not the end of the story. There are now versions |
| 5339 | of Linux (where SIG_IGN does work) that are picky. If, having set SIG_IGN, a |
| 5340 | process then calls waitpid(), a grumble is written to the system log, because |
| 5341 | this is logically inconsistent. In other words, it doesn't like the paranoia. |
| 5342 | As a consequenc of this, the waitpid() below is now excluded if we are sure |
| 5343 | that SIG_IGN works. */ |
| 5344 | |
| 5345 | if (!synchronous_delivery) |
| 5346 | { |
| 5347 | #ifdef SA_NOCLDWAIT |
| 5348 | struct sigaction act; |
| 5349 | act.sa_handler = SIG_IGN; |
| 5350 | sigemptyset(&(act.sa_mask)); |
| 5351 | act.sa_flags = SA_NOCLDWAIT; |
| 5352 | sigaction(SIGCHLD, &act, NULL); |
| 5353 | #else |
| 5354 | signal(SIGCHLD, SIG_IGN); |
| 5355 | #endif |
| 5356 | } |
| 5357 | |
| 5358 | /* Save the current store pool point, for resetting at the start of |
| 5359 | each message, and save the real sender address, if any. */ |
| 5360 | |
| 5361 | reset_point = store_get(0); |
| 5362 | real_sender_address = sender_address; |
| 5363 | |
| 5364 | /* Loop to receive messages; receive_msg() returns TRUE if there are more |
| 5365 | messages to be read (SMTP input), or FALSE otherwise (not SMTP, or SMTP channel |
| 5366 | collapsed). */ |
| 5367 | |
| 5368 | while (more) |
| 5369 | { |
| 5370 | store_reset(reset_point); |
| 5371 | message_id[0] = 0; |
| 5372 | |
| 5373 | /* Handle the SMTP case; call smtp_setup_mst() to deal with the initial SMTP |
| 5374 | input and build the recipients list, before calling receive_msg() to read the |
| 5375 | message proper. Whatever sender address is given in the SMTP transaction is |
| 5376 | often ignored for local senders - we use the actual sender, which is normally |
| 5377 | either the underlying user running this process or a -f argument provided by |
| 5378 | a trusted caller. It is saved in real_sender_address. The test for whether to |
| 5379 | accept the SMTP sender is encapsulated in receive_check_set_sender(). */ |
| 5380 | |
| 5381 | if (smtp_input) |
| 5382 | { |
| 5383 | int rc; |
| 5384 | if ((rc = smtp_setup_msg()) > 0) |
| 5385 | { |
| 5386 | if (real_sender_address != NULL && |
| 5387 | !receive_check_set_sender(sender_address)) |
| 5388 | { |
| 5389 | sender_address = raw_sender = real_sender_address; |
| 5390 | sender_address_unrewritten = NULL; |
| 5391 | } |
| 5392 | |
| 5393 | /* For batched SMTP, we have to run the acl_not_smtp_start ACL, since it |
| 5394 | isn't really SMTP, so no other ACL will run until the acl_not_smtp one at |
| 5395 | the very end. The result of the ACL is ignored (as for other non-SMTP |
| 5396 | messages). It is run for its potential side effects. */ |
| 5397 | |
| 5398 | if (smtp_batched_input && acl_not_smtp_start != NULL) |
| 5399 | { |
| 5400 | uschar *user_msg, *log_msg; |
| 5401 | enable_dollar_recipients = TRUE; |
| 5402 | (void)acl_check(ACL_WHERE_NOTSMTP_START, NULL, acl_not_smtp_start, |
| 5403 | &user_msg, &log_msg); |
| 5404 | enable_dollar_recipients = FALSE; |
| 5405 | } |
| 5406 | |
| 5407 | /* Now get the data for the message */ |
| 5408 | |
| 5409 | more = receive_msg(extract_recipients); |
| 5410 | if (message_id[0] == 0) |
| 5411 | { |
| 5412 | if (more) continue; |
| 5413 | smtp_log_no_mail(); /* Log no mail if configured */ |
| 5414 | exim_exit(EXIT_FAILURE); |
| 5415 | } |
| 5416 | } |
| 5417 | else |
| 5418 | { |
| 5419 | smtp_log_no_mail(); /* Log no mail if configured */ |
| 5420 | exim_exit((rc == 0)? EXIT_SUCCESS : EXIT_FAILURE); |
| 5421 | } |
| 5422 | } |
| 5423 | |
| 5424 | /* In the non-SMTP case, we have all the information from the command |
| 5425 | line, but must process it in case it is in the more general RFC822 |
| 5426 | format, and in any case, to detect syntax errors. Also, it appears that |
| 5427 | the use of comma-separated lists as single arguments is common, so we |
| 5428 | had better support them. */ |
| 5429 | |
| 5430 | else |
| 5431 | { |
| 5432 | int i; |
| 5433 | int rcount = 0; |
| 5434 | int count = argc - recipients_arg; |
| 5435 | uschar **list = argv + recipients_arg; |
| 5436 | |
| 5437 | /* These options cannot be changed dynamically for non-SMTP messages */ |
| 5438 | |
| 5439 | active_local_sender_retain = local_sender_retain; |
| 5440 | active_local_from_check = local_from_check; |
| 5441 | |
| 5442 | /* Save before any rewriting */ |
| 5443 | |
| 5444 | raw_sender = string_copy(sender_address); |
| 5445 | |
| 5446 | /* Loop for each argument */ |
| 5447 | |
| 5448 | for (i = 0; i < count; i++) |
| 5449 | { |
| 5450 | int start, end, domain; |
| 5451 | uschar *errmess; |
| 5452 | uschar *s = list[i]; |
| 5453 | |
| 5454 | /* Loop for each comma-separated address */ |
| 5455 | |
| 5456 | while (*s != 0) |
| 5457 | { |
| 5458 | BOOL finished = FALSE; |
| 5459 | uschar *recipient; |
| 5460 | uschar *ss = parse_find_address_end(s, FALSE); |
| 5461 | |
| 5462 | if (*ss == ',') *ss = 0; else finished = TRUE; |
| 5463 | |
| 5464 | /* Check max recipients - if -t was used, these aren't recipients */ |
| 5465 | |
| 5466 | if (recipients_max > 0 && ++rcount > recipients_max && |
| 5467 | !extract_recipients) |
| 5468 | if (error_handling == ERRORS_STDERR) |
| 5469 | { |
| 5470 | fprintf(stderr, "exim: too many recipients\n"); |
| 5471 | exim_exit(EXIT_FAILURE); |
| 5472 | } |
| 5473 | else |
| 5474 | { |
| 5475 | return |
| 5476 | moan_to_sender(ERRMESS_TOOMANYRECIP, NULL, NULL, stdin, TRUE)? |
| 5477 | errors_sender_rc : EXIT_FAILURE; |
| 5478 | } |
| 5479 | |
| 5480 | #ifdef SUPPORT_I18N |
| 5481 | { |
| 5482 | BOOL b = allow_utf8_domains; |
| 5483 | allow_utf8_domains = TRUE; |
| 5484 | #endif |
| 5485 | recipient = |
| 5486 | parse_extract_address(s, &errmess, &start, &end, &domain, FALSE); |
| 5487 | |
| 5488 | #ifdef SUPPORT_I18N |
| 5489 | if (string_is_utf8(recipient)) |
| 5490 | message_smtputf8 = TRUE; |
| 5491 | else |
| 5492 | allow_utf8_domains = b; |
| 5493 | } |
| 5494 | #endif |
| 5495 | if (domain == 0 && !allow_unqualified_recipient) |
| 5496 | { |
| 5497 | recipient = NULL; |
| 5498 | errmess = US"unqualified recipient address not allowed"; |
| 5499 | } |
| 5500 | |
| 5501 | if (recipient == NULL) |
| 5502 | { |
| 5503 | if (error_handling == ERRORS_STDERR) |
| 5504 | { |
| 5505 | fprintf(stderr, "exim: bad recipient address \"%s\": %s\n", |
| 5506 | string_printing(list[i]), errmess); |
| 5507 | exim_exit(EXIT_FAILURE); |
| 5508 | } |
| 5509 | else |
| 5510 | { |
| 5511 | error_block eblock; |
| 5512 | eblock.next = NULL; |
| 5513 | eblock.text1 = string_printing(list[i]); |
| 5514 | eblock.text2 = errmess; |
| 5515 | return |
| 5516 | moan_to_sender(ERRMESS_BADARGADDRESS, &eblock, NULL, stdin, TRUE)? |
| 5517 | errors_sender_rc : EXIT_FAILURE; |
| 5518 | } |
| 5519 | } |
| 5520 | |
| 5521 | receive_add_recipient(recipient, -1); |
| 5522 | s = ss; |
| 5523 | if (!finished) |
| 5524 | while (*(++s) != 0 && (*s == ',' || isspace(*s))); |
| 5525 | } |
| 5526 | } |
| 5527 | |
| 5528 | /* Show the recipients when debugging */ |
| 5529 | |
| 5530 | DEBUG(D_receive) |
| 5531 | { |
| 5532 | int i; |
| 5533 | if (sender_address != NULL) debug_printf("Sender: %s\n", sender_address); |
| 5534 | if (recipients_list != NULL) |
| 5535 | { |
| 5536 | debug_printf("Recipients:\n"); |
| 5537 | for (i = 0; i < recipients_count; i++) |
| 5538 | debug_printf(" %s\n", recipients_list[i].address); |
| 5539 | } |
| 5540 | } |
| 5541 | |
| 5542 | /* Run the acl_not_smtp_start ACL if required. The result of the ACL is |
| 5543 | ignored; rejecting here would just add complication, and it can just as |
| 5544 | well be done later. Allow $recipients to be visible in the ACL. */ |
| 5545 | |
| 5546 | if (acl_not_smtp_start != NULL) |
| 5547 | { |
| 5548 | uschar *user_msg, *log_msg; |
| 5549 | enable_dollar_recipients = TRUE; |
| 5550 | (void)acl_check(ACL_WHERE_NOTSMTP_START, NULL, acl_not_smtp_start, |
| 5551 | &user_msg, &log_msg); |
| 5552 | enable_dollar_recipients = FALSE; |
| 5553 | } |
| 5554 | |
| 5555 | /* Read the data for the message. If filter_test is not FTEST_NONE, this |
| 5556 | will just read the headers for the message, and not write anything onto the |
| 5557 | spool. */ |
| 5558 | |
| 5559 | message_ended = END_NOTENDED; |
| 5560 | more = receive_msg(extract_recipients); |
| 5561 | |
| 5562 | /* more is always FALSE here (not SMTP message) when reading a message |
| 5563 | for real; when reading the headers of a message for filter testing, |
| 5564 | it is TRUE if the headers were terminated by '.' and FALSE otherwise. */ |
| 5565 | |
| 5566 | if (message_id[0] == 0) exim_exit(EXIT_FAILURE); |
| 5567 | } /* Non-SMTP message reception */ |
| 5568 | |
| 5569 | /* If this is a filter testing run, there are headers in store, but |
| 5570 | no message on the spool. Run the filtering code in testing mode, setting |
| 5571 | the domain to the qualify domain and the local part to the current user, |
| 5572 | unless they have been set by options. The prefix and suffix are left unset |
| 5573 | unless specified. The the return path is set to to the sender unless it has |
| 5574 | already been set from a return-path header in the message. */ |
| 5575 | |
| 5576 | if (filter_test != FTEST_NONE) |
| 5577 | { |
| 5578 | deliver_domain = (ftest_domain != NULL)? |
| 5579 | ftest_domain : qualify_domain_recipient; |
| 5580 | deliver_domain_orig = deliver_domain; |
| 5581 | deliver_localpart = (ftest_localpart != NULL)? |
| 5582 | ftest_localpart : originator_login; |
| 5583 | deliver_localpart_orig = deliver_localpart; |
| 5584 | deliver_localpart_prefix = ftest_prefix; |
| 5585 | deliver_localpart_suffix = ftest_suffix; |
| 5586 | deliver_home = originator_home; |
| 5587 | |
| 5588 | if (return_path == NULL) |
| 5589 | { |
| 5590 | printf("Return-path copied from sender\n"); |
| 5591 | return_path = string_copy(sender_address); |
| 5592 | } |
| 5593 | else |
| 5594 | printf("Return-path = %s\n", (return_path[0] == 0)? US"<>" : return_path); |
| 5595 | printf("Sender = %s\n", (sender_address[0] == 0)? US"<>" : sender_address); |
| 5596 | |
| 5597 | receive_add_recipient( |
| 5598 | string_sprintf("%s%s%s@%s", |
| 5599 | (ftest_prefix == NULL)? US"" : ftest_prefix, |
| 5600 | deliver_localpart, |
| 5601 | (ftest_suffix == NULL)? US"" : ftest_suffix, |
| 5602 | deliver_domain), -1); |
| 5603 | |
| 5604 | printf("Recipient = %s\n", recipients_list[0].address); |
| 5605 | if (ftest_prefix != NULL) printf("Prefix = %s\n", ftest_prefix); |
| 5606 | if (ftest_suffix != NULL) printf("Suffix = %s\n", ftest_suffix); |
| 5607 | |
| 5608 | if (chdir("/")) /* Get away from wherever the user is running this from */ |
| 5609 | { |
| 5610 | DEBUG(D_receive) debug_printf("chdir(\"/\") failed\n"); |
| 5611 | exim_exit(EXIT_FAILURE); |
| 5612 | } |
| 5613 | |
| 5614 | /* Now we run either a system filter test, or a user filter test, or both. |
| 5615 | In the latter case, headers added by the system filter will persist and be |
| 5616 | available to the user filter. We need to copy the filter variables |
| 5617 | explicitly. */ |
| 5618 | |
| 5619 | if ((filter_test & FTEST_SYSTEM) != 0) |
| 5620 | { |
| 5621 | if (!filter_runtest(filter_sfd, filter_test_sfile, TRUE, more)) |
| 5622 | exim_exit(EXIT_FAILURE); |
| 5623 | } |
| 5624 | |
| 5625 | memcpy(filter_sn, filter_n, sizeof(filter_sn)); |
| 5626 | |
| 5627 | if ((filter_test & FTEST_USER) != 0) |
| 5628 | { |
| 5629 | if (!filter_runtest(filter_ufd, filter_test_ufile, FALSE, more)) |
| 5630 | exim_exit(EXIT_FAILURE); |
| 5631 | } |
| 5632 | |
| 5633 | exim_exit(EXIT_SUCCESS); |
| 5634 | } |
| 5635 | |
| 5636 | /* Else act on the result of message reception. We should not get here unless |
| 5637 | message_id[0] is non-zero. If queue_only is set, session_local_queue_only |
| 5638 | will be TRUE. If it is not, check on the number of messages received in this |
| 5639 | connection. */ |
| 5640 | |
| 5641 | if (!session_local_queue_only && |
| 5642 | smtp_accept_queue_per_connection > 0 && |
| 5643 | receive_messagecount > smtp_accept_queue_per_connection) |
| 5644 | { |
| 5645 | session_local_queue_only = TRUE; |
| 5646 | queue_only_reason = 2; |
| 5647 | } |
| 5648 | |
| 5649 | /* Initialize local_queue_only from session_local_queue_only. If it is false, |
| 5650 | and queue_only_load is set, check that the load average is below it. If it is |
| 5651 | not, set local_queue_only TRUE. If queue_only_load_latch is true (the |
| 5652 | default), we put the whole session into queue_only mode. It then remains this |
| 5653 | way for any subsequent messages on the same SMTP connection. This is a |
| 5654 | deliberate choice; even though the load average may fall, it doesn't seem |
| 5655 | right to deliver later messages on the same call when not delivering earlier |
| 5656 | ones. However, there are odd cases where this is not wanted, so this can be |
| 5657 | changed by setting queue_only_load_latch false. */ |
| 5658 | |
| 5659 | local_queue_only = session_local_queue_only; |
| 5660 | if (!local_queue_only && queue_only_load >= 0) |
| 5661 | { |
| 5662 | local_queue_only = (load_average = OS_GETLOADAVG()) > queue_only_load; |
| 5663 | if (local_queue_only) |
| 5664 | { |
| 5665 | queue_only_reason = 3; |
| 5666 | if (queue_only_load_latch) session_local_queue_only = TRUE; |
| 5667 | } |
| 5668 | } |
| 5669 | |
| 5670 | /* If running as an MUA wrapper, all queueing options and freezing options |
| 5671 | are ignored. */ |
| 5672 | |
| 5673 | if (mua_wrapper) |
| 5674 | local_queue_only = queue_only_policy = deliver_freeze = FALSE; |
| 5675 | |
| 5676 | /* Log the queueing here, when it will get a message id attached, but |
| 5677 | not if queue_only is set (case 0). Case 1 doesn't happen here (too many |
| 5678 | connections). */ |
| 5679 | |
| 5680 | if (local_queue_only) switch(queue_only_reason) |
| 5681 | { |
| 5682 | case 2: |
| 5683 | log_write(L_delay_delivery, |
| 5684 | LOG_MAIN, "no immediate delivery: more than %d messages " |
| 5685 | "received in one connection", smtp_accept_queue_per_connection); |
| 5686 | break; |
| 5687 | |
| 5688 | case 3: |
| 5689 | log_write(L_delay_delivery, |
| 5690 | LOG_MAIN, "no immediate delivery: load average %.2f", |
| 5691 | (double)load_average/1000.0); |
| 5692 | break; |
| 5693 | } |
| 5694 | |
| 5695 | /* Else do the delivery unless the ACL or local_scan() called for queue only |
| 5696 | or froze the message. Always deliver in a separate process. A fork failure is |
| 5697 | not a disaster, as the delivery will eventually happen on a subsequent queue |
| 5698 | run. The search cache must be tidied before the fork, as the parent will |
| 5699 | do it before exiting. The child will trigger a lookup failure and |
| 5700 | thereby defer the delivery if it tries to use (for example) a cached ldap |
| 5701 | connection that the parent has called unbind on. */ |
| 5702 | |
| 5703 | else if (!queue_only_policy && !deliver_freeze) |
| 5704 | { |
| 5705 | pid_t pid; |
| 5706 | search_tidyup(); |
| 5707 | |
| 5708 | if ((pid = fork()) == 0) |
| 5709 | { |
| 5710 | int rc; |
| 5711 | close_unwanted(); /* Close unwanted file descriptors and TLS */ |
| 5712 | exim_nullstd(); /* Ensure std{in,out,err} exist */ |
| 5713 | |
| 5714 | /* Re-exec Exim if we need to regain privilege (note: in mua_wrapper |
| 5715 | mode, deliver_drop_privilege is forced TRUE). */ |
| 5716 | |
| 5717 | if (geteuid() != root_uid && !deliver_drop_privilege && !unprivileged) |
| 5718 | { |
| 5719 | (void)child_exec_exim(CEE_EXEC_EXIT, FALSE, NULL, FALSE, |
| 5720 | 2, US"-Mc", message_id); |
| 5721 | /* Control does not return here. */ |
| 5722 | } |
| 5723 | |
| 5724 | /* No need to re-exec */ |
| 5725 | |
| 5726 | rc = deliver_message(message_id, FALSE, FALSE); |
| 5727 | search_tidyup(); |
| 5728 | _exit((!mua_wrapper || rc == DELIVER_MUA_SUCCEEDED)? |
| 5729 | EXIT_SUCCESS : EXIT_FAILURE); |
| 5730 | } |
| 5731 | |
| 5732 | if (pid < 0) |
| 5733 | { |
| 5734 | log_write(0, LOG_MAIN|LOG_PANIC, "failed to fork automatic delivery " |
| 5735 | "process: %s", strerror(errno)); |
| 5736 | } |
| 5737 | |
| 5738 | /* In the parent, wait if synchronous delivery is required. This will |
| 5739 | always be the case in MUA wrapper mode. */ |
| 5740 | |
| 5741 | else if (synchronous_delivery) |
| 5742 | { |
| 5743 | int status; |
| 5744 | while (wait(&status) != pid); |
| 5745 | if ((status & 0x00ff) != 0) |
| 5746 | log_write(0, LOG_MAIN|LOG_PANIC, |
| 5747 | "process %d crashed with signal %d while delivering %s", |
| 5748 | (int)pid, status & 0x00ff, message_id); |
| 5749 | if (mua_wrapper && (status & 0xffff) != 0) exim_exit(EXIT_FAILURE); |
| 5750 | } |
| 5751 | } |
| 5752 | |
| 5753 | /* The loop will repeat if more is TRUE. If we do not know know that the OS |
| 5754 | automatically reaps children (see comments above the loop), clear away any |
| 5755 | finished subprocesses here, in case there are lots of messages coming in |
| 5756 | from the same source. */ |
| 5757 | |
| 5758 | #ifndef SIG_IGN_WORKS |
| 5759 | while (waitpid(-1, NULL, WNOHANG) > 0); |
| 5760 | #endif |
| 5761 | } |
| 5762 | |
| 5763 | exim_exit(EXIT_SUCCESS); /* Never returns */ |
| 5764 | return 0; /* To stop compiler warning */ |
| 5765 | } |
| 5766 | |
| 5767 | /* End of exim.c */ |