| 1 | /* $Cambridge: exim/src/src/exim.c,v 1.16 2005/03/15 14:09:12 ph10 Exp $ */ |
| 2 | |
| 3 | /************************************************* |
| 4 | * Exim - an Internet mail transport agent * |
| 5 | *************************************************/ |
| 6 | |
| 7 | /* Copyright (c) University of Cambridge 1995 - 2005 */ |
| 8 | /* See the file NOTICE for conditions of use and distribution. */ |
| 9 | |
| 10 | |
| 11 | /* The main function: entry point, initialization, and high-level control. |
| 12 | Also a few functions that don't naturally fit elsewhere. */ |
| 13 | |
| 14 | |
| 15 | #include "exim.h" |
| 16 | |
| 17 | |
| 18 | |
| 19 | /************************************************* |
| 20 | * Function interface to store functions * |
| 21 | *************************************************/ |
| 22 | |
| 23 | /* We need some real functions to pass to the PCRE regular expression library |
| 24 | for store allocation via Exim's store manager. The normal calls are actually |
| 25 | macros that pass over location information to make tracing easier. These |
| 26 | functions just interface to the standard macro calls. A good compiler will |
| 27 | optimize out the tail recursion and so not make them too expensive. There |
| 28 | are two sets of functions; one for use when we want to retain the compiled |
| 29 | regular expression for a long time; the other for short-term use. */ |
| 30 | |
| 31 | static void * |
| 32 | function_store_get(size_t size) |
| 33 | { |
| 34 | return store_get((int)size); |
| 35 | } |
| 36 | |
| 37 | static void |
| 38 | function_dummy_free(void *block) { block = block; } |
| 39 | |
| 40 | static void * |
| 41 | function_store_malloc(size_t size) |
| 42 | { |
| 43 | return store_malloc((int)size); |
| 44 | } |
| 45 | |
| 46 | static void |
| 47 | function_store_free(void *block) |
| 48 | { |
| 49 | store_free(block); |
| 50 | } |
| 51 | |
| 52 | |
| 53 | |
| 54 | |
| 55 | /************************************************* |
| 56 | * Compile regular expression and panic on fail * |
| 57 | *************************************************/ |
| 58 | |
| 59 | /* This function is called when failure to compile a regular expression leads |
| 60 | to a panic exit. In other cases, pcre_compile() is called directly. In many |
| 61 | cases where this function is used, the results of the compilation are to be |
| 62 | placed in long-lived store, so we temporarily reset the store management |
| 63 | functions that PCRE uses if the use_malloc flag is set. |
| 64 | |
| 65 | Argument: |
| 66 | pattern the pattern to compile |
| 67 | caseless TRUE if caseless matching is required |
| 68 | use_malloc TRUE if compile into malloc store |
| 69 | |
| 70 | Returns: pointer to the compiled pattern |
| 71 | */ |
| 72 | |
| 73 | const pcre * |
| 74 | regex_must_compile(uschar *pattern, BOOL caseless, BOOL use_malloc) |
| 75 | { |
| 76 | int offset; |
| 77 | int options = PCRE_COPT; |
| 78 | const pcre *yield; |
| 79 | const uschar *error; |
| 80 | if (use_malloc) |
| 81 | { |
| 82 | pcre_malloc = function_store_malloc; |
| 83 | pcre_free = function_store_free; |
| 84 | } |
| 85 | if (caseless) options |= PCRE_CASELESS; |
| 86 | yield = pcre_compile(CS pattern, options, (const char **)&error, &offset, NULL); |
| 87 | pcre_malloc = function_store_get; |
| 88 | pcre_free = function_dummy_free; |
| 89 | if (yield == NULL) |
| 90 | log_write(0, LOG_MAIN|LOG_PANIC_DIE, "regular expression error: " |
| 91 | "%s at offset %d while compiling %s", error, offset, pattern); |
| 92 | return yield; |
| 93 | } |
| 94 | |
| 95 | |
| 96 | |
| 97 | |
| 98 | /************************************************* |
| 99 | * Execute regular expression and set strings * |
| 100 | *************************************************/ |
| 101 | |
| 102 | /* This function runs a regular expression match, and sets up the pointers to |
| 103 | the matched substrings. |
| 104 | |
| 105 | Arguments: |
| 106 | re the compiled expression |
| 107 | subject the subject string |
| 108 | options additional PCRE options |
| 109 | setup if < 0 do full setup |
| 110 | if >= 0 setup from setup+1 onwards, |
| 111 | excluding the full matched string |
| 112 | |
| 113 | Returns: TRUE or FALSE |
| 114 | */ |
| 115 | |
| 116 | BOOL |
| 117 | regex_match_and_setup(const pcre *re, uschar *subject, int options, int setup) |
| 118 | { |
| 119 | int ovector[3*(EXPAND_MAXN+1)]; |
| 120 | int n = pcre_exec(re, NULL, CS subject, Ustrlen(subject), 0, |
| 121 | PCRE_EOPT | options, ovector, sizeof(ovector)/sizeof(int)); |
| 122 | BOOL yield = n >= 0; |
| 123 | if (n == 0) n = EXPAND_MAXN + 1; |
| 124 | if (yield) |
| 125 | { |
| 126 | int nn; |
| 127 | expand_nmax = (setup < 0)? 0 : setup + 1; |
| 128 | for (nn = (setup < 0)? 0 : 2; nn < n*2; nn += 2) |
| 129 | { |
| 130 | expand_nstring[expand_nmax] = subject + ovector[nn]; |
| 131 | expand_nlength[expand_nmax++] = ovector[nn+1] - ovector[nn]; |
| 132 | } |
| 133 | expand_nmax--; |
| 134 | } |
| 135 | return yield; |
| 136 | } |
| 137 | |
| 138 | |
| 139 | |
| 140 | |
| 141 | /************************************************* |
| 142 | * Handler for SIGUSR1 * |
| 143 | *************************************************/ |
| 144 | |
| 145 | /* SIGUSR1 causes any exim process to write to the process log details of |
| 146 | what it is currently doing. It will only be used if the OS is capable of |
| 147 | setting up a handler that causes automatic restarting of any system call |
| 148 | that is in progress at the time. |
| 149 | |
| 150 | Argument: the signal number (SIGUSR1) |
| 151 | Returns: nothing |
| 152 | */ |
| 153 | |
| 154 | static void |
| 155 | usr1_handler(int sig) |
| 156 | { |
| 157 | sig = sig; /* Keep picky compilers happy */ |
| 158 | log_write(0, LOG_PROCESS, "%s", process_info); |
| 159 | log_close_all(); |
| 160 | os_restarting_signal(SIGUSR1, usr1_handler); |
| 161 | } |
| 162 | |
| 163 | |
| 164 | |
| 165 | /************************************************* |
| 166 | * Timeout handler * |
| 167 | *************************************************/ |
| 168 | |
| 169 | /* This handler is enabled most of the time that Exim is running. The handler |
| 170 | doesn't actually get used unless alarm() has been called to set a timer, to |
| 171 | place a time limit on a system call of some kind. When the handler is run, it |
| 172 | re-enables itself. |
| 173 | |
| 174 | There are some other SIGALRM handlers that are used in special cases when more |
| 175 | than just a flag setting is required; for example, when reading a message's |
| 176 | input. These are normally set up in the code module that uses them, and the |
| 177 | SIGALRM handler is reset to this one afterwards. |
| 178 | |
| 179 | Argument: the signal value (SIGALRM) |
| 180 | Returns: nothing |
| 181 | */ |
| 182 | |
| 183 | void |
| 184 | sigalrm_handler(int sig) |
| 185 | { |
| 186 | sig = sig; /* Keep picky compilers happy */ |
| 187 | sigalrm_seen = TRUE; |
| 188 | os_non_restarting_signal(SIGALRM, sigalrm_handler); |
| 189 | } |
| 190 | |
| 191 | |
| 192 | |
| 193 | /************************************************* |
| 194 | * Sleep for a fractional time interval * |
| 195 | *************************************************/ |
| 196 | |
| 197 | /* This function is called by millisleep() and exim_wait_tick() to wait for a |
| 198 | period of time that may include a fraction of a second. The coding is somewhat |
| 199 | tedious. We do not expect setitimer() ever to fail, but if it does, the process |
| 200 | will wait for ever, so we panic in this instance. (There was a case of this |
| 201 | when a bug in a function that calls milliwait() caused it to pass invalid data. |
| 202 | That's when I added the check. :-) |
| 203 | |
| 204 | Argument: an itimerval structure containing the interval |
| 205 | Returns: nothing |
| 206 | */ |
| 207 | |
| 208 | static void |
| 209 | milliwait(struct itimerval *itval) |
| 210 | { |
| 211 | sigset_t sigmask; |
| 212 | sigset_t old_sigmask; |
| 213 | (void)sigemptyset(&sigmask); /* Empty mask */ |
| 214 | (void)sigaddset(&sigmask, SIGALRM); /* Add SIGALRM */ |
| 215 | (void)sigprocmask(SIG_BLOCK, &sigmask, &old_sigmask); /* Block SIGALRM */ |
| 216 | if (setitimer(ITIMER_REAL, itval, NULL) < 0) /* Start timer */ |
| 217 | log_write(0, LOG_MAIN|LOG_PANIC_DIE, |
| 218 | "setitimer() failed: %s", strerror(errno)); |
| 219 | (void)sigfillset(&sigmask); /* All signals */ |
| 220 | (void)sigdelset(&sigmask, SIGALRM); /* Remove SIGALRM */ |
| 221 | (void)sigsuspend(&sigmask); /* Until SIGALRM */ |
| 222 | (void)sigprocmask(SIG_SETMASK, &old_sigmask, NULL); /* Restore mask */ |
| 223 | } |
| 224 | |
| 225 | |
| 226 | |
| 227 | |
| 228 | /************************************************* |
| 229 | * Millisecond sleep function * |
| 230 | *************************************************/ |
| 231 | |
| 232 | /* The basic sleep() function has a granularity of 1 second, which is too rough |
| 233 | in some cases - for example, when using an increasing delay to slow down |
| 234 | spammers. |
| 235 | |
| 236 | Argument: number of millseconds |
| 237 | Returns: nothing |
| 238 | */ |
| 239 | |
| 240 | void |
| 241 | millisleep(int msec) |
| 242 | { |
| 243 | struct itimerval itval; |
| 244 | itval.it_interval.tv_sec = 0; |
| 245 | itval.it_interval.tv_usec = 0; |
| 246 | itval.it_value.tv_sec = msec/1000; |
| 247 | itval.it_value.tv_usec = (msec % 1000) * 1000; |
| 248 | milliwait(&itval); |
| 249 | } |
| 250 | |
| 251 | |
| 252 | |
| 253 | /************************************************* |
| 254 | * Compare microsecond times * |
| 255 | *************************************************/ |
| 256 | |
| 257 | /* |
| 258 | Arguments: |
| 259 | tv1 the first time |
| 260 | tv2 the second time |
| 261 | |
| 262 | Returns: -1, 0, or +1 |
| 263 | */ |
| 264 | |
| 265 | int |
| 266 | exim_tvcmp(struct timeval *t1, struct timeval *t2) |
| 267 | { |
| 268 | if (t1->tv_sec > t2->tv_sec) return +1; |
| 269 | if (t1->tv_sec < t2->tv_sec) return -1; |
| 270 | if (t1->tv_usec > t2->tv_usec) return +1; |
| 271 | if (t1->tv_usec < t2->tv_usec) return -1; |
| 272 | return 0; |
| 273 | } |
| 274 | |
| 275 | |
| 276 | |
| 277 | |
| 278 | /************************************************* |
| 279 | * Clock tick wait function * |
| 280 | *************************************************/ |
| 281 | |
| 282 | /* Exim uses a time + a pid to generate a unique identifier in two places: its |
| 283 | message IDs, and in file names for maildir deliveries. Because some OS now |
| 284 | re-use pids within the same second, sub-second times are now being used. |
| 285 | However, for absolute certaintly, we must ensure the clock has ticked before |
| 286 | allowing the relevant process to complete. At the time of implementation of |
| 287 | this code (February 2003), the speed of processors is such that the clock will |
| 288 | invariably have ticked already by the time a process has done its job. This |
| 289 | function prepares for the time when things are faster - and it also copes with |
| 290 | clocks that go backwards. |
| 291 | |
| 292 | Arguments: |
| 293 | then_tv A timeval which was used to create uniqueness; its usec field |
| 294 | has been rounded down to the value of the resolution. |
| 295 | We want to be sure the current time is greater than this. |
| 296 | resolution The resolution that was used to divide the microseconds |
| 297 | (1 for maildir, larger for message ids) |
| 298 | |
| 299 | Returns: nothing |
| 300 | */ |
| 301 | |
| 302 | void |
| 303 | exim_wait_tick(struct timeval *then_tv, int resolution) |
| 304 | { |
| 305 | struct timeval now_tv; |
| 306 | long int now_true_usec; |
| 307 | |
| 308 | (void)gettimeofday(&now_tv, NULL); |
| 309 | now_true_usec = now_tv.tv_usec; |
| 310 | now_tv.tv_usec = (now_true_usec/resolution) * resolution; |
| 311 | |
| 312 | if (exim_tvcmp(&now_tv, then_tv) <= 0) |
| 313 | { |
| 314 | struct itimerval itval; |
| 315 | itval.it_interval.tv_sec = 0; |
| 316 | itval.it_interval.tv_usec = 0; |
| 317 | itval.it_value.tv_sec = then_tv->tv_sec - now_tv.tv_sec; |
| 318 | itval.it_value.tv_usec = then_tv->tv_usec + resolution - now_true_usec; |
| 319 | |
| 320 | /* We know that, overall, "now" is less than or equal to "then". Therefore, a |
| 321 | negative value for the microseconds is possible only in the case when "now" |
| 322 | is more than a second less than "then". That means that itval.it_value.tv_sec |
| 323 | is greater than zero. The following correction is therefore safe. */ |
| 324 | |
| 325 | if (itval.it_value.tv_usec < 0) |
| 326 | { |
| 327 | itval.it_value.tv_usec += 1000000; |
| 328 | itval.it_value.tv_sec -= 1; |
| 329 | } |
| 330 | |
| 331 | DEBUG(D_transport|D_receive) |
| 332 | { |
| 333 | if (!running_in_test_harness) |
| 334 | { |
| 335 | debug_printf("tick check: %lu.%06lu %lu.%06lu\n", |
| 336 | then_tv->tv_sec, then_tv->tv_usec, now_tv.tv_sec, now_tv.tv_usec); |
| 337 | debug_printf("waiting %lu.%06lu\n", itval.it_value.tv_sec, |
| 338 | itval.it_value.tv_usec); |
| 339 | } |
| 340 | } |
| 341 | |
| 342 | milliwait(&itval); |
| 343 | } |
| 344 | } |
| 345 | |
| 346 | |
| 347 | |
| 348 | |
| 349 | /************************************************* |
| 350 | * Set up processing details * |
| 351 | *************************************************/ |
| 352 | |
| 353 | /* Save a text string for dumping when SIGUSR1 is received. |
| 354 | Do checks for overruns. |
| 355 | |
| 356 | Arguments: format and arguments, as for printf() |
| 357 | Returns: nothing |
| 358 | */ |
| 359 | |
| 360 | void |
| 361 | set_process_info(char *format, ...) |
| 362 | { |
| 363 | int len; |
| 364 | va_list ap; |
| 365 | sprintf(CS process_info, "%5d ", (int)getpid()); |
| 366 | len = Ustrlen(process_info); |
| 367 | va_start(ap, format); |
| 368 | if (!string_vformat(process_info + len, PROCESS_INFO_SIZE - len, format, ap)) |
| 369 | Ustrcpy(process_info + len, "**** string overflowed buffer ****"); |
| 370 | DEBUG(D_process_info) debug_printf("set_process_info: %s\n", process_info); |
| 371 | va_end(ap); |
| 372 | } |
| 373 | |
| 374 | |
| 375 | |
| 376 | |
| 377 | |
| 378 | /************************************************* |
| 379 | * Ensure stdin, stdout, and stderr exist * |
| 380 | *************************************************/ |
| 381 | |
| 382 | /* Some operating systems grumble if an exec() happens without a standard |
| 383 | input, output, and error (fds 0, 1, 2) being defined. The worry is that some |
| 384 | file will be opened and will use these fd values, and then some other bit of |
| 385 | code will assume, for example, that it can write error messages to stderr. |
| 386 | This function ensures that fds 0, 1, and 2 are open if they do not already |
| 387 | exist, by connecting them to /dev/null. |
| 388 | |
| 389 | This function is also used to ensure that std{in,out,err} exist at all times, |
| 390 | so that if any library that Exim calls tries to use them, it doesn't crash. |
| 391 | |
| 392 | Arguments: None |
| 393 | Returns: Nothing |
| 394 | */ |
| 395 | |
| 396 | void |
| 397 | exim_nullstd(void) |
| 398 | { |
| 399 | int i; |
| 400 | int devnull = -1; |
| 401 | struct stat statbuf; |
| 402 | for (i = 0; i <= 2; i++) |
| 403 | { |
| 404 | if (fstat(i, &statbuf) < 0 && errno == EBADF) |
| 405 | { |
| 406 | if (devnull < 0) devnull = open("/dev/null", O_RDWR); |
| 407 | if (devnull < 0) log_write(0, LOG_MAIN|LOG_PANIC_DIE, "%s", |
| 408 | string_open_failed(errno, "/dev/null")); |
| 409 | if (devnull != i) dup2(devnull, i); |
| 410 | } |
| 411 | } |
| 412 | if (devnull > 2) close(devnull); |
| 413 | } |
| 414 | |
| 415 | |
| 416 | |
| 417 | |
| 418 | /************************************************* |
| 419 | * Close unwanted file descriptors for delivery * |
| 420 | *************************************************/ |
| 421 | |
| 422 | /* This function is called from a new process that has been forked to deliver |
| 423 | an incoming message, either directly, or using exec. |
| 424 | |
| 425 | We want any smtp input streams to be closed in this new process. However, it |
| 426 | has been observed that using fclose() here causes trouble. When reading in -bS |
| 427 | input, duplicate copies of messages have been seen. The files will be sharing a |
| 428 | file pointer with the parent process, and it seems that fclose() (at least on |
| 429 | some systems - I saw this on Solaris 2.5.1) messes with that file pointer, at |
| 430 | least sometimes. Hence we go for closing the underlying file descriptors. |
| 431 | |
| 432 | If TLS is active, we want to shut down the TLS library, but without molesting |
| 433 | the parent's SSL connection. |
| 434 | |
| 435 | For delivery of a non-SMTP message, we want to close stdin and stdout (and |
| 436 | stderr unless debugging) because the calling process might have set them up as |
| 437 | pipes and be waiting for them to close before it waits for the submission |
| 438 | process to terminate. If they aren't closed, they hold up the calling process |
| 439 | until the initial delivery process finishes, which is not what we want. |
| 440 | |
| 441 | Exception: We do want it for synchronous delivery! |
| 442 | |
| 443 | And notwithstanding all the above, if D_resolver is set, implying resolver |
| 444 | debugging, leave stdout open, because that's where the resolver writes its |
| 445 | debugging output. |
| 446 | |
| 447 | When we close stderr (which implies we've also closed stdout), we also get rid |
| 448 | of any controlling terminal. |
| 449 | |
| 450 | Arguments: None |
| 451 | Returns: Nothing |
| 452 | */ |
| 453 | |
| 454 | static void |
| 455 | close_unwanted(void) |
| 456 | { |
| 457 | if (smtp_input) |
| 458 | { |
| 459 | #ifdef SUPPORT_TLS |
| 460 | tls_close(FALSE); /* Shut down the TLS library */ |
| 461 | #endif |
| 462 | close(fileno(smtp_in)); |
| 463 | close(fileno(smtp_out)); |
| 464 | smtp_in = NULL; |
| 465 | } |
| 466 | else |
| 467 | { |
| 468 | close(0); /* stdin */ |
| 469 | if ((debug_selector & D_resolver) == 0) close(1); /* stdout */ |
| 470 | if (debug_selector == 0) /* stderr */ |
| 471 | { |
| 472 | if (!synchronous_delivery) |
| 473 | { |
| 474 | close(2); |
| 475 | log_stderr = NULL; |
| 476 | } |
| 477 | (void)setsid(); |
| 478 | } |
| 479 | } |
| 480 | } |
| 481 | |
| 482 | |
| 483 | |
| 484 | |
| 485 | /************************************************* |
| 486 | * Set uid and gid * |
| 487 | *************************************************/ |
| 488 | |
| 489 | /* This function sets a new uid and gid permanently, optionally calling |
| 490 | initgroups() to set auxiliary groups. There are some special cases when running |
| 491 | Exim in unprivileged modes. In these situations the effective uid will not be |
| 492 | root; if we already have the right effective uid/gid, and don't need to |
| 493 | initialize any groups, leave things as they are. |
| 494 | |
| 495 | Arguments: |
| 496 | uid the uid |
| 497 | gid the gid |
| 498 | igflag TRUE if initgroups() wanted |
| 499 | msg text to use in debugging output and failure log |
| 500 | |
| 501 | Returns: nothing; bombs out on failure |
| 502 | */ |
| 503 | |
| 504 | void |
| 505 | exim_setugid(uid_t uid, gid_t gid, BOOL igflag, uschar *msg) |
| 506 | { |
| 507 | uid_t euid = geteuid(); |
| 508 | gid_t egid = getegid(); |
| 509 | |
| 510 | if (euid == root_uid || euid != uid || egid != gid || igflag) |
| 511 | { |
| 512 | /* At least one OS returns +1 for initgroups failure, so just check for |
| 513 | non-zero. */ |
| 514 | |
| 515 | if (igflag) |
| 516 | { |
| 517 | struct passwd *pw = getpwuid(uid); |
| 518 | if (pw != NULL) |
| 519 | { |
| 520 | if (initgroups(pw->pw_name, gid) != 0) |
| 521 | log_write(0,LOG_MAIN|LOG_PANIC_DIE,"initgroups failed for uid=%ld: %s", |
| 522 | (long int)uid, strerror(errno)); |
| 523 | } |
| 524 | else log_write(0, LOG_MAIN|LOG_PANIC_DIE, "cannot run initgroups(): " |
| 525 | "no passwd entry for uid=%ld", (long int)uid); |
| 526 | } |
| 527 | |
| 528 | if (setgid(gid) < 0 || setuid(uid) < 0) |
| 529 | { |
| 530 | log_write(0, LOG_MAIN|LOG_PANIC_DIE, "unable to set gid=%ld or uid=%ld " |
| 531 | "(euid=%ld): %s", (long int)gid, (long int)uid, (long int)euid, msg); |
| 532 | } |
| 533 | } |
| 534 | |
| 535 | /* Debugging output included uid/gid and all groups */ |
| 536 | |
| 537 | DEBUG(D_uid) |
| 538 | { |
| 539 | int group_count; |
| 540 | gid_t group_list[NGROUPS_MAX]; |
| 541 | debug_printf("changed uid/gid: %s\n uid=%ld gid=%ld pid=%ld\n", msg, |
| 542 | (long int)geteuid(), (long int)getegid(), (long int)getpid()); |
| 543 | group_count = getgroups(NGROUPS_MAX, group_list); |
| 544 | debug_printf(" auxiliary group list:"); |
| 545 | if (group_count > 0) |
| 546 | { |
| 547 | int i; |
| 548 | for (i = 0; i < group_count; i++) debug_printf(" %d", (int)group_list[i]); |
| 549 | } |
| 550 | else debug_printf(" <none>"); |
| 551 | debug_printf("\n"); |
| 552 | } |
| 553 | } |
| 554 | |
| 555 | |
| 556 | |
| 557 | |
| 558 | /************************************************* |
| 559 | * Exit point * |
| 560 | *************************************************/ |
| 561 | |
| 562 | /* Exim exits via this function so that it always clears up any open |
| 563 | databases. |
| 564 | |
| 565 | Arguments: |
| 566 | rc return code |
| 567 | |
| 568 | Returns: does not return |
| 569 | */ |
| 570 | |
| 571 | void |
| 572 | exim_exit(int rc) |
| 573 | { |
| 574 | search_tidyup(); |
| 575 | DEBUG(D_any) |
| 576 | debug_printf(">>>>>>>>>>>>>>>> Exim pid=%d terminating with rc=%d " |
| 577 | ">>>>>>>>>>>>>>>>\n", (int)getpid(), rc); |
| 578 | exit(rc); |
| 579 | } |
| 580 | |
| 581 | |
| 582 | |
| 583 | |
| 584 | /************************************************* |
| 585 | * Extract port from host address * |
| 586 | *************************************************/ |
| 587 | |
| 588 | /* Called to extract the port from the values given to -oMa and -oMi. |
| 589 | It also checks the syntax of the address. |
| 590 | |
| 591 | Argument: |
| 592 | address the address, with possible port on the end |
| 593 | |
| 594 | Returns: the port, or zero if there isn't one |
| 595 | bombs out on a syntax error |
| 596 | */ |
| 597 | |
| 598 | static int |
| 599 | check_port(uschar *address) |
| 600 | { |
| 601 | int port = host_extract_port(address); |
| 602 | if (string_is_ip_address(address, NULL) == 0) |
| 603 | { |
| 604 | fprintf(stderr, "exim abandoned: \"%s\" is not an IP address\n", address); |
| 605 | exit(EXIT_FAILURE); |
| 606 | } |
| 607 | return port; |
| 608 | } |
| 609 | |
| 610 | |
| 611 | |
| 612 | /************************************************* |
| 613 | * Test/verify an address * |
| 614 | *************************************************/ |
| 615 | |
| 616 | /* This function is called by the -bv and -bt code. It extracts a working |
| 617 | address from a full RFC 822 address. This isn't really necessary per se, but it |
| 618 | has the effect of collapsing source routes. |
| 619 | |
| 620 | Arguments: |
| 621 | s the address string |
| 622 | flags flag bits for verify_address() |
| 623 | exit_value to be set for failures |
| 624 | |
| 625 | Returns: nothing |
| 626 | */ |
| 627 | |
| 628 | static void |
| 629 | test_address(uschar *s, int flags, int *exit_value) |
| 630 | { |
| 631 | int start, end, domain; |
| 632 | uschar *parse_error = NULL; |
| 633 | uschar *address = parse_extract_address(s, &parse_error, &start, &end, &domain, |
| 634 | FALSE); |
| 635 | if (address == NULL) |
| 636 | { |
| 637 | fprintf(stdout, "syntax error: %s\n", parse_error); |
| 638 | *exit_value = 2; |
| 639 | } |
| 640 | else |
| 641 | { |
| 642 | int rc = verify_address(deliver_make_addr(address,TRUE), stdout, flags, -1, |
| 643 | -1, -1, NULL, NULL, NULL); |
| 644 | if (rc == FAIL) *exit_value = 2; |
| 645 | else if (rc == DEFER && *exit_value == 0) *exit_value = 1; |
| 646 | } |
| 647 | } |
| 648 | |
| 649 | |
| 650 | |
| 651 | /************************************************* |
| 652 | * Decode bit settings for log/debug * |
| 653 | *************************************************/ |
| 654 | |
| 655 | /* This function decodes a string containing bit settings in the form of +name |
| 656 | and/or -name sequences, and sets/unsets bits in a bit string accordingly. It |
| 657 | also recognizes a numeric setting of the form =<number>, but this is not |
| 658 | intended for user use. It's an easy way for Exim to pass the debug settings |
| 659 | when it is re-exec'ed. |
| 660 | |
| 661 | The log options are held in two unsigned ints (because there became too many |
| 662 | for one). The top bit in the table means "put in 2nd selector". This does not |
| 663 | yet apply to debug options, so the "=" facility sets only the first selector. |
| 664 | |
| 665 | A bad value for a debug setting is treated as an unknown option - error message |
| 666 | to stderr and die. For log settings, which come from the configuration file, |
| 667 | we write to the log on the way out... |
| 668 | |
| 669 | Arguments: |
| 670 | selector1 address of the first bit string |
| 671 | selector2 address of the second bit string, or NULL |
| 672 | string the configured string |
| 673 | options the table of option names |
| 674 | count size of table |
| 675 | which "log" or "debug" |
| 676 | |
| 677 | Returns: nothing on success - bomb out on failure |
| 678 | */ |
| 679 | |
| 680 | static void |
| 681 | decode_bits(unsigned int *selector1, unsigned int *selector2, uschar *string, |
| 682 | bit_table *options, int count, uschar *which) |
| 683 | { |
| 684 | uschar *errmsg; |
| 685 | if (string == NULL) return; |
| 686 | |
| 687 | if (*string == '=') |
| 688 | { |
| 689 | char *end; /* Not uschar */ |
| 690 | *selector1 = strtoul(CS string+1, &end, 0); |
| 691 | if (*end == 0) return; |
| 692 | errmsg = string_sprintf("malformed numeric %s_selector setting: %s", which, |
| 693 | string); |
| 694 | goto ERROR_RETURN; |
| 695 | } |
| 696 | |
| 697 | /* Handle symbolic setting */ |
| 698 | |
| 699 | else for(;;) |
| 700 | { |
| 701 | BOOL adding; |
| 702 | uschar *s; |
| 703 | int len; |
| 704 | bit_table *start, *end; |
| 705 | |
| 706 | while (isspace(*string)) string++; |
| 707 | if (*string == 0) return; |
| 708 | |
| 709 | if (*string != '+' && *string != '-') |
| 710 | { |
| 711 | errmsg = string_sprintf("malformed %s_selector setting: " |
| 712 | "+ or - expected but found \"%s\"", which, string); |
| 713 | goto ERROR_RETURN; |
| 714 | } |
| 715 | |
| 716 | adding = *string++ == '+'; |
| 717 | s = string; |
| 718 | while (isalnum(*string) || *string == '_') string++; |
| 719 | len = string - s; |
| 720 | |
| 721 | start = options; |
| 722 | end = options + count; |
| 723 | |
| 724 | while (start < end) |
| 725 | { |
| 726 | bit_table *middle = start + (end - start)/2; |
| 727 | int c = Ustrncmp(s, middle->name, len); |
| 728 | if (c == 0) |
| 729 | { |
| 730 | if (middle->name[len] != 0) c = -1; else |
| 731 | { |
| 732 | unsigned int bit = middle->bit; |
| 733 | unsigned int *selector; |
| 734 | |
| 735 | /* The value with all bits set means "set all bits in both selectors" |
| 736 | in the case where two are being handled. However, the top bit in the |
| 737 | second selector is never set. */ |
| 738 | |
| 739 | if (bit == 0xffffffff) |
| 740 | { |
| 741 | *selector1 = adding? bit : 0; |
| 742 | if (selector2 != NULL) *selector2 = adding? 0x7fffffff : 0; |
| 743 | } |
| 744 | |
| 745 | /* Otherwise, the 0x80000000 bit means "this value, without the top |
| 746 | bit, belongs in the second selector". */ |
| 747 | |
| 748 | else |
| 749 | { |
| 750 | if ((bit & 0x80000000) != 0) |
| 751 | { |
| 752 | selector = selector2; |
| 753 | bit &= 0x7fffffff; |
| 754 | } |
| 755 | else selector = selector1; |
| 756 | if (adding) *selector |= bit; else *selector &= ~bit; |
| 757 | } |
| 758 | break; /* Out of loop to match selector name */ |
| 759 | } |
| 760 | } |
| 761 | if (c < 0) end = middle; else start = middle + 1; |
| 762 | } /* Loop to match selector name */ |
| 763 | |
| 764 | if (start >= end) |
| 765 | { |
| 766 | errmsg = string_sprintf("unknown %s_selector setting: %c%.*s", which, |
| 767 | adding? '+' : '-', len, s); |
| 768 | goto ERROR_RETURN; |
| 769 | } |
| 770 | } /* Loop for selector names */ |
| 771 | |
| 772 | /* Handle disasters */ |
| 773 | |
| 774 | ERROR_RETURN: |
| 775 | if (Ustrcmp(which, "debug") == 0) |
| 776 | { |
| 777 | fprintf(stderr, "exim: %s\n", errmsg); |
| 778 | exit(EXIT_FAILURE); |
| 779 | } |
| 780 | else log_write(0, LOG_CONFIG|LOG_PANIC_DIE, "%s", errmsg); |
| 781 | } |
| 782 | |
| 783 | |
| 784 | |
| 785 | /************************************************* |
| 786 | * Show supported features * |
| 787 | *************************************************/ |
| 788 | |
| 789 | /* This function is called for -bV and for -d to output the optional features |
| 790 | of the current Exim binary. |
| 791 | |
| 792 | Arguments: a FILE for printing |
| 793 | Returns: nothing |
| 794 | */ |
| 795 | |
| 796 | static void |
| 797 | show_whats_supported(FILE *f) |
| 798 | { |
| 799 | #ifdef DB_VERSION_STRING |
| 800 | fprintf(f, "Berkeley DB: %s\n", DB_VERSION_STRING); |
| 801 | #elif defined(BTREEVERSION) && defined(HASHVERSION) |
| 802 | #ifdef USE_DB |
| 803 | fprintf(f, "Probably Berkeley DB version 1.8x (native mode)\n"); |
| 804 | #else |
| 805 | fprintf(f, "Probably Berkeley DB version 1.8x (compatibility mode)\n"); |
| 806 | #endif |
| 807 | #elif defined(_DBM_RDONLY) || defined(dbm_dirfno) |
| 808 | fprintf(f, "Probably ndbm\n"); |
| 809 | #elif defined(USE_TDB) |
| 810 | fprintf(f, "Using tdb\n"); |
| 811 | #else |
| 812 | #ifdef USE_GDBM |
| 813 | fprintf(f, "Probably GDBM (native mode)\n"); |
| 814 | #else |
| 815 | fprintf(f, "Probably GDBM (compatibility mode)\n"); |
| 816 | #endif |
| 817 | #endif |
| 818 | |
| 819 | fprintf(f, "Support for:"); |
| 820 | #if HAVE_ICONV |
| 821 | fprintf(f, " iconv()"); |
| 822 | #endif |
| 823 | #if HAVE_IPV6 |
| 824 | fprintf(f, " IPv6"); |
| 825 | #endif |
| 826 | #ifdef SUPPORT_PAM |
| 827 | fprintf(f, " PAM"); |
| 828 | #endif |
| 829 | #ifdef EXIM_PERL |
| 830 | fprintf(f, " Perl"); |
| 831 | #endif |
| 832 | #ifdef USE_TCP_WRAPPERS |
| 833 | fprintf(f, " TCPwrappers"); |
| 834 | #endif |
| 835 | #ifdef SUPPORT_TLS |
| 836 | #ifdef USE_GNUTLS |
| 837 | fprintf(f, " GnuTLS"); |
| 838 | #else |
| 839 | fprintf(f, " OpenSSL"); |
| 840 | #endif |
| 841 | #endif |
| 842 | #ifdef WITH_CONTENT_SCAN |
| 843 | fprintf(f, " Content_Scanning"); |
| 844 | #endif |
| 845 | #ifdef WITH_OLD_DEMIME |
| 846 | fprintf(f, " Old_Demime"); |
| 847 | #endif |
| 848 | #ifdef EXPERIMENTAL_SPF |
| 849 | fprintf(f, " Experimental_SPF"); |
| 850 | #endif |
| 851 | #ifdef EXPERIMENTAL_SRS |
| 852 | fprintf(f, " Experimental_SRS"); |
| 853 | #endif |
| 854 | #ifdef EXPERIMENTAL_BRIGHTMAIL |
| 855 | fprintf(f, " Experimental_Brightmail"); |
| 856 | #endif |
| 857 | #ifdef EXPERIMENTAL_DOMAINKEYS |
| 858 | fprintf(f, " Experimental_DomainKeys"); |
| 859 | #endif |
| 860 | fprintf(f, "\n"); |
| 861 | |
| 862 | fprintf(f, "Lookups:"); |
| 863 | #ifdef LOOKUP_LSEARCH |
| 864 | fprintf(f, " lsearch wildlsearch nwildlsearch iplsearch"); |
| 865 | #endif |
| 866 | #ifdef LOOKUP_CDB |
| 867 | fprintf(f, " cdb"); |
| 868 | #endif |
| 869 | #ifdef LOOKUP_DBM |
| 870 | fprintf(f, " dbm dbmnz"); |
| 871 | #endif |
| 872 | #ifdef LOOKUP_DNSDB |
| 873 | fprintf(f, " dnsdb"); |
| 874 | #endif |
| 875 | #ifdef LOOKUP_DSEARCH |
| 876 | fprintf(f, " dsearch"); |
| 877 | #endif |
| 878 | #ifdef LOOKUP_IBASE |
| 879 | fprintf(f, " ibase"); |
| 880 | #endif |
| 881 | #ifdef LOOKUP_LDAP |
| 882 | fprintf(f, " ldap ldapdn ldapm"); |
| 883 | #endif |
| 884 | #ifdef LOOKUP_MYSQL |
| 885 | fprintf(f, " mysql"); |
| 886 | #endif |
| 887 | #ifdef LOOKUP_NIS |
| 888 | fprintf(f, " nis nis0"); |
| 889 | #endif |
| 890 | #ifdef LOOKUP_NISPLUS |
| 891 | fprintf(f, " nisplus"); |
| 892 | #endif |
| 893 | #ifdef LOOKUP_ORACLE |
| 894 | fprintf(f, " oracle"); |
| 895 | #endif |
| 896 | #ifdef LOOKUP_PASSWD |
| 897 | fprintf(f, " passwd"); |
| 898 | #endif |
| 899 | #ifdef LOOKUP_PGSQL |
| 900 | fprintf(f, " pgsql"); |
| 901 | #endif |
| 902 | #ifdef LOOKUP_TESTDB |
| 903 | fprintf(f, " testdb"); |
| 904 | #endif |
| 905 | #ifdef LOOKUP_WHOSON |
| 906 | fprintf(f, " whoson"); |
| 907 | #endif |
| 908 | fprintf(f, "\n"); |
| 909 | |
| 910 | fprintf(f, "Authenticators:"); |
| 911 | #ifdef AUTH_CRAM_MD5 |
| 912 | fprintf(f, " cram_md5"); |
| 913 | #endif |
| 914 | #ifdef AUTH_CYRUS_SASL |
| 915 | fprintf(f, " cyrus_sasl"); |
| 916 | #endif |
| 917 | #ifdef AUTH_PLAINTEXT |
| 918 | fprintf(f, " plaintext"); |
| 919 | #endif |
| 920 | #ifdef AUTH_SPA |
| 921 | fprintf(f, " spa"); |
| 922 | #endif |
| 923 | fprintf(f, "\n"); |
| 924 | |
| 925 | fprintf(f, "Routers:"); |
| 926 | #ifdef ROUTER_ACCEPT |
| 927 | fprintf(f, " accept"); |
| 928 | #endif |
| 929 | #ifdef ROUTER_DNSLOOKUP |
| 930 | fprintf(f, " dnslookup"); |
| 931 | #endif |
| 932 | #ifdef ROUTER_IPLITERAL |
| 933 | fprintf(f, " ipliteral"); |
| 934 | #endif |
| 935 | #ifdef ROUTER_IPLOOKUP |
| 936 | fprintf(f, " iplookup"); |
| 937 | #endif |
| 938 | #ifdef ROUTER_MANUALROUTE |
| 939 | fprintf(f, " manualroute"); |
| 940 | #endif |
| 941 | #ifdef ROUTER_QUERYPROGRAM |
| 942 | fprintf(f, " queryprogram"); |
| 943 | #endif |
| 944 | #ifdef ROUTER_REDIRECT |
| 945 | fprintf(f, " redirect"); |
| 946 | #endif |
| 947 | fprintf(f, "\n"); |
| 948 | |
| 949 | fprintf(f, "Transports:"); |
| 950 | #ifdef TRANSPORT_APPENDFILE |
| 951 | fprintf(f, " appendfile"); |
| 952 | #ifdef SUPPORT_MAILDIR |
| 953 | fprintf(f, "/maildir"); |
| 954 | #endif |
| 955 | #ifdef SUPPORT_MAILSTORE |
| 956 | fprintf(f, "/mailstore"); |
| 957 | #endif |
| 958 | #ifdef SUPPORT_MBX |
| 959 | fprintf(f, "/mbx"); |
| 960 | #endif |
| 961 | #endif |
| 962 | #ifdef TRANSPORT_AUTOREPLY |
| 963 | fprintf(f, " autoreply"); |
| 964 | #endif |
| 965 | #ifdef TRANSPORT_LMTP |
| 966 | fprintf(f, " lmtp"); |
| 967 | #endif |
| 968 | #ifdef TRANSPORT_PIPE |
| 969 | fprintf(f, " pipe"); |
| 970 | #endif |
| 971 | #ifdef TRANSPORT_SMTP |
| 972 | fprintf(f, " smtp"); |
| 973 | #endif |
| 974 | fprintf(f, "\n"); |
| 975 | |
| 976 | if (fixed_never_users[0] > 0) |
| 977 | { |
| 978 | int i; |
| 979 | fprintf(f, "Fixed never_users: "); |
| 980 | for (i = 1; i <= (int)fixed_never_users[0] - 1; i++) |
| 981 | fprintf(f, "%d:", (unsigned int)fixed_never_users[i]); |
| 982 | fprintf(f, "%d\n", (unsigned int)fixed_never_users[i]); |
| 983 | } |
| 984 | } |
| 985 | |
| 986 | |
| 987 | |
| 988 | |
| 989 | /************************************************* |
| 990 | * Quote a local part * |
| 991 | *************************************************/ |
| 992 | |
| 993 | /* This function is used when a sender address or a From: or Sender: header |
| 994 | line is being created from the caller's login, or from an authenticated_id. It |
| 995 | applies appropriate quoting rules for a local part. |
| 996 | |
| 997 | Argument: the local part |
| 998 | Returns: the local part, quoted if necessary |
| 999 | */ |
| 1000 | |
| 1001 | uschar * |
| 1002 | local_part_quote(uschar *lpart) |
| 1003 | { |
| 1004 | BOOL needs_quote = FALSE; |
| 1005 | int size, ptr; |
| 1006 | uschar *yield; |
| 1007 | uschar *t; |
| 1008 | |
| 1009 | for (t = lpart; !needs_quote && *t != 0; t++) |
| 1010 | { |
| 1011 | needs_quote = !isalnum(*t) && strchr("!#$%&'*+-/=?^_`{|}~", *t) == NULL && |
| 1012 | (*t != '.' || t == lpart || t[1] == 0); |
| 1013 | } |
| 1014 | |
| 1015 | if (!needs_quote) return lpart; |
| 1016 | |
| 1017 | size = ptr = 0; |
| 1018 | yield = string_cat(NULL, &size, &ptr, US"\"", 1); |
| 1019 | |
| 1020 | for (;;) |
| 1021 | { |
| 1022 | uschar *nq = US Ustrpbrk(lpart, "\\\""); |
| 1023 | if (nq == NULL) |
| 1024 | { |
| 1025 | yield = string_cat(yield, &size, &ptr, lpart, Ustrlen(lpart)); |
| 1026 | break; |
| 1027 | } |
| 1028 | yield = string_cat(yield, &size, &ptr, lpart, nq - lpart); |
| 1029 | yield = string_cat(yield, &size, &ptr, US"\\", 1); |
| 1030 | yield = string_cat(yield, &size, &ptr, nq, 1); |
| 1031 | lpart = nq + 1; |
| 1032 | } |
| 1033 | |
| 1034 | yield = string_cat(yield, &size, &ptr, US"\"", 1); |
| 1035 | yield[ptr] = 0; |
| 1036 | return yield; |
| 1037 | } |
| 1038 | |
| 1039 | |
| 1040 | |
| 1041 | #ifdef USE_READLINE |
| 1042 | /************************************************* |
| 1043 | * Load readline() functions * |
| 1044 | *************************************************/ |
| 1045 | |
| 1046 | /* This function is called from testing executions that read data from stdin, |
| 1047 | but only when running as the calling user. Currently, only -be does this. The |
| 1048 | function loads the readline() function library and passes back the functions. |
| 1049 | On some systems, it needs the curses library, so load that too, but try without |
| 1050 | it if loading fails. All this functionality has to be requested at build time. |
| 1051 | |
| 1052 | Arguments: |
| 1053 | fn_readline_ptr pointer to where to put the readline pointer |
| 1054 | fn_addhist_ptr pointer to where to put the addhistory function |
| 1055 | |
| 1056 | Returns: the dlopen handle or NULL on failure |
| 1057 | */ |
| 1058 | |
| 1059 | static void * |
| 1060 | set_readline(char * (**fn_readline_ptr)(char *), |
| 1061 | char * (**fn_addhist_ptr)(char *)) |
| 1062 | { |
| 1063 | void *dlhandle; |
| 1064 | void *dlhandle_curses = dlopen("libcurses.so", RTLD_GLOBAL|RTLD_LAZY); |
| 1065 | |
| 1066 | dlhandle = dlopen("libreadline.so", RTLD_GLOBAL|RTLD_NOW); |
| 1067 | if (dlhandle_curses != NULL) dlclose(dlhandle_curses); |
| 1068 | |
| 1069 | if (dlhandle != NULL) |
| 1070 | { |
| 1071 | *fn_readline_ptr = (char *(*)(char*))dlsym(dlhandle, "readline"); |
| 1072 | *fn_addhist_ptr = (char *(*)(char*))dlsym(dlhandle, "add_history"); |
| 1073 | } |
| 1074 | else |
| 1075 | { |
| 1076 | DEBUG(D_any) debug_printf("failed to load readline: %s\n", dlerror()); |
| 1077 | } |
| 1078 | |
| 1079 | return dlhandle; |
| 1080 | } |
| 1081 | #endif |
| 1082 | |
| 1083 | |
| 1084 | |
| 1085 | /************************************************* |
| 1086 | * Get a line from stdin for testing things * |
| 1087 | *************************************************/ |
| 1088 | |
| 1089 | /* This function is called when running tests that can take a number of lines |
| 1090 | of input (for example, -be and -bt). It handles continuations and trailing |
| 1091 | spaces. And prompting and a blank line output on eof. If readline() is in use, |
| 1092 | the arguments are non-NULL and provide the relevant functions. |
| 1093 | |
| 1094 | Arguments: |
| 1095 | fn_readline readline function or NULL |
| 1096 | fn_addhist addhist function or NULL |
| 1097 | |
| 1098 | Returns: pointer to dynamic memory, or NULL at end of file |
| 1099 | */ |
| 1100 | |
| 1101 | static uschar * |
| 1102 | get_stdinput(char *(*fn_readline)(char *), char *(*fn_addhist)(char *)) |
| 1103 | { |
| 1104 | int i; |
| 1105 | int size = 0; |
| 1106 | int ptr = 0; |
| 1107 | uschar *yield = NULL; |
| 1108 | |
| 1109 | if (fn_readline == NULL) printf("> "); |
| 1110 | |
| 1111 | for (i = 0;; i++) |
| 1112 | { |
| 1113 | uschar buffer[1024]; |
| 1114 | uschar *p, *ss; |
| 1115 | |
| 1116 | #ifdef USE_READLINE |
| 1117 | char *readline_line = NULL; |
| 1118 | if (fn_readline != NULL) |
| 1119 | { |
| 1120 | if ((readline_line = fn_readline((i > 0)? "":"> ")) == NULL) break; |
| 1121 | if (*readline_line != 0 && fn_addhist != NULL) fn_addhist(readline_line); |
| 1122 | p = US readline_line; |
| 1123 | } |
| 1124 | else |
| 1125 | #endif |
| 1126 | |
| 1127 | /* readline() not in use */ |
| 1128 | |
| 1129 | { |
| 1130 | if (Ufgets(buffer, sizeof(buffer), stdin) == NULL) break; |
| 1131 | p = buffer; |
| 1132 | } |
| 1133 | |
| 1134 | /* Handle the line */ |
| 1135 | |
| 1136 | ss = p + (int)Ustrlen(p); |
| 1137 | while (ss > p && isspace(ss[-1])) ss--; |
| 1138 | |
| 1139 | if (i > 0) |
| 1140 | { |
| 1141 | while (p < ss && isspace(*p)) p++; /* leading space after cont */ |
| 1142 | } |
| 1143 | |
| 1144 | yield = string_cat(yield, &size, &ptr, p, ss - p); |
| 1145 | |
| 1146 | #ifdef USE_READLINE |
| 1147 | if (fn_readline != NULL) free(readline_line); |
| 1148 | #endif |
| 1149 | |
| 1150 | if (ss == p || yield[ptr-1] != '\\') |
| 1151 | { |
| 1152 | yield[ptr] = 0; |
| 1153 | break; |
| 1154 | } |
| 1155 | yield[--ptr] = 0; |
| 1156 | } |
| 1157 | |
| 1158 | if (yield == NULL) printf("\n"); |
| 1159 | return yield; |
| 1160 | } |
| 1161 | |
| 1162 | |
| 1163 | |
| 1164 | /************************************************* |
| 1165 | * Entry point and high-level code * |
| 1166 | *************************************************/ |
| 1167 | |
| 1168 | /* Entry point for the Exim mailer. Analyse the arguments and arrange to take |
| 1169 | the appropriate action. All the necessary functions are present in the one |
| 1170 | binary. I originally thought one should split it up, but it turns out that so |
| 1171 | much of the apparatus is needed in each chunk that one might as well just have |
| 1172 | it all available all the time, which then makes the coding easier as well. |
| 1173 | |
| 1174 | Arguments: |
| 1175 | argc count of entries in argv |
| 1176 | argv argument strings, with argv[0] being the program name |
| 1177 | |
| 1178 | Returns: EXIT_SUCCESS if terminated successfully |
| 1179 | EXIT_FAILURE otherwise, except when a message has been sent |
| 1180 | to the sender, and -oee was given |
| 1181 | */ |
| 1182 | |
| 1183 | int |
| 1184 | main(int argc, char **cargv) |
| 1185 | { |
| 1186 | uschar **argv = USS cargv; |
| 1187 | int arg_receive_timeout = -1; |
| 1188 | int arg_smtp_receive_timeout = -1; |
| 1189 | int arg_error_handling = error_handling; |
| 1190 | int filter_sfd = -1; |
| 1191 | int filter_ufd = -1; |
| 1192 | int group_count; |
| 1193 | int i; |
| 1194 | int list_queue_option = 0; |
| 1195 | int msg_action = 0; |
| 1196 | int msg_action_arg = -1; |
| 1197 | int namelen = (argv[0] == NULL)? 0 : Ustrlen(argv[0]); |
| 1198 | int queue_only_reason = 0; |
| 1199 | #ifdef EXIM_PERL |
| 1200 | int perl_start_option = 0; |
| 1201 | #endif |
| 1202 | int recipients_arg = argc; |
| 1203 | int sender_address_domain = 0; |
| 1204 | int test_retry_arg = -1; |
| 1205 | int test_rewrite_arg = -1; |
| 1206 | BOOL arg_queue_only = FALSE; |
| 1207 | BOOL bi_option = FALSE; |
| 1208 | BOOL checking = FALSE; |
| 1209 | BOOL count_queue = FALSE; |
| 1210 | BOOL expansion_test = FALSE; |
| 1211 | BOOL extract_recipients = FALSE; |
| 1212 | BOOL forced_delivery = FALSE; |
| 1213 | BOOL f_end_dot = FALSE; |
| 1214 | BOOL deliver_give_up = FALSE; |
| 1215 | BOOL list_queue = FALSE; |
| 1216 | BOOL list_options = FALSE; |
| 1217 | BOOL local_queue_only; |
| 1218 | BOOL more = TRUE; |
| 1219 | BOOL one_msg_action = FALSE; |
| 1220 | BOOL queue_only_set = FALSE; |
| 1221 | BOOL receiving_message = TRUE; |
| 1222 | BOOL unprivileged; |
| 1223 | BOOL removed_privilege = FALSE; |
| 1224 | BOOL verify_address_mode = FALSE; |
| 1225 | BOOL verify_as_sender = FALSE; |
| 1226 | BOOL version_printed = FALSE; |
| 1227 | uschar *alias_arg = NULL; |
| 1228 | uschar *called_as = US""; |
| 1229 | uschar *start_queue_run_id = NULL; |
| 1230 | uschar *stop_queue_run_id = NULL; |
| 1231 | uschar *ftest_domain = NULL; |
| 1232 | uschar *ftest_localpart = NULL; |
| 1233 | uschar *ftest_prefix = NULL; |
| 1234 | uschar *ftest_suffix = NULL; |
| 1235 | uschar *real_sender_address; |
| 1236 | uschar *originator_home = US"/"; |
| 1237 | void *reset_point; |
| 1238 | |
| 1239 | struct passwd *pw; |
| 1240 | struct stat statbuf; |
| 1241 | pid_t passed_qr_pid = (pid_t)0; |
| 1242 | int passed_qr_pipe = -1; |
| 1243 | gid_t group_list[NGROUPS_MAX]; |
| 1244 | |
| 1245 | /* Possible options for -R and -S */ |
| 1246 | |
| 1247 | static uschar *rsopts[] = { US"f", US"ff", US"r", US"rf", US"rff" }; |
| 1248 | |
| 1249 | /* Need to define this in case we need to change the environment in order |
| 1250 | to get rid of a bogus time zone. We have to make it char rather than uschar |
| 1251 | because some OS define it in /usr/include/unistd.h. */ |
| 1252 | |
| 1253 | extern char **environ; |
| 1254 | |
| 1255 | /* If the Exim user and/or group and/or the configuration file owner/group were |
| 1256 | defined by ref:name at build time, we must now find the actual uid/gid values. |
| 1257 | This is a feature to make the lives of binary distributors easier. */ |
| 1258 | |
| 1259 | #ifdef EXIM_USERNAME |
| 1260 | if (route_finduser(US EXIM_USERNAME, &pw, &exim_uid)) |
| 1261 | { |
| 1262 | exim_gid = pw->pw_gid; |
| 1263 | } |
| 1264 | else |
| 1265 | { |
| 1266 | fprintf(stderr, "exim: failed to find uid for user name \"%s\"\n", |
| 1267 | EXIM_USERNAME); |
| 1268 | exit(EXIT_FAILURE); |
| 1269 | } |
| 1270 | #endif |
| 1271 | |
| 1272 | #ifdef EXIM_GROUPNAME |
| 1273 | if (!route_findgroup(US EXIM_GROUPNAME, &exim_gid)) |
| 1274 | { |
| 1275 | fprintf(stderr, "exim: failed to find gid for group name \"%s\"\n", |
| 1276 | EXIM_GROUPNAME); |
| 1277 | exit(EXIT_FAILURE); |
| 1278 | } |
| 1279 | #endif |
| 1280 | |
| 1281 | #ifdef CONFIGURE_OWNERNAME |
| 1282 | if (!route_finduser(US CONFIGURE_OWNERNAME, NULL, &config_uid)) |
| 1283 | { |
| 1284 | fprintf(stderr, "exim: failed to find uid for user name \"%s\"\n", |
| 1285 | CONFIGURE_OWNERNAME); |
| 1286 | exit(EXIT_FAILURE); |
| 1287 | } |
| 1288 | #endif |
| 1289 | |
| 1290 | #ifdef CONFIGURE_GROUPNAME |
| 1291 | if (!route_findgroup(US CONFIGURE_GROUPNAME, &config_gid)) |
| 1292 | { |
| 1293 | fprintf(stderr, "exim: failed to find gid for group name \"%s\"\n", |
| 1294 | CONFIGURE_GROUPNAME); |
| 1295 | exit(EXIT_FAILURE); |
| 1296 | } |
| 1297 | #endif |
| 1298 | |
| 1299 | /* In the Cygwin environment, some initialization needs doing. It is fudged |
| 1300 | in by means of this macro. */ |
| 1301 | |
| 1302 | #ifdef OS_INIT |
| 1303 | OS_INIT |
| 1304 | #endif |
| 1305 | |
| 1306 | /* Check a field which is patched when we are running Exim within its |
| 1307 | testing harness; do a fast initial check, and then the whole thing. */ |
| 1308 | |
| 1309 | running_in_test_harness = |
| 1310 | *running_status == '<' && Ustrcmp(running_status, "<<<testing>>>") == 0; |
| 1311 | |
| 1312 | /* The C standard says that the equivalent of setlocale(LC_ALL, "C") is obeyed |
| 1313 | at the start of a program; however, it seems that some environments do not |
| 1314 | follow this. A "strange" locale can affect the formatting of timestamps, so we |
| 1315 | make quite sure. */ |
| 1316 | |
| 1317 | setlocale(LC_ALL, "C"); |
| 1318 | |
| 1319 | /* Set up the default handler for timing using alarm(). */ |
| 1320 | |
| 1321 | os_non_restarting_signal(SIGALRM, sigalrm_handler); |
| 1322 | |
| 1323 | /* Ensure we have a buffer for constructing log entries. Use malloc directly, |
| 1324 | because store_malloc writes a log entry on failure. */ |
| 1325 | |
| 1326 | log_buffer = (uschar *)malloc(LOG_BUFFER_SIZE); |
| 1327 | if (log_buffer == NULL) |
| 1328 | { |
| 1329 | fprintf(stderr, "exim: failed to get store for log buffer\n"); |
| 1330 | exit(EXIT_FAILURE); |
| 1331 | } |
| 1332 | |
| 1333 | /* Set log_stderr to stderr, provided that stderr exists. This gets reset to |
| 1334 | NULL when the daemon is run and the file is closed. We have to use this |
| 1335 | indirection, because some systems don't allow writing to the variable "stderr". |
| 1336 | */ |
| 1337 | |
| 1338 | if (fstat(fileno(stderr), &statbuf) >= 0) log_stderr = stderr; |
| 1339 | |
| 1340 | /* Arrange for the PCRE regex library to use our store functions. Note that |
| 1341 | the normal calls are actually macros that add additional arguments for |
| 1342 | debugging purposes so we have to assign specially constructed functions here. |
| 1343 | The default is to use store in the stacking pool, but this is overridden in the |
| 1344 | regex_must_compile() function. */ |
| 1345 | |
| 1346 | pcre_malloc = function_store_get; |
| 1347 | pcre_free = function_dummy_free; |
| 1348 | |
| 1349 | /* Ensure there is a big buffer for temporary use in several places. It is put |
| 1350 | in malloc store so that it can be freed for enlargement if necessary. */ |
| 1351 | |
| 1352 | big_buffer = store_malloc(big_buffer_size); |
| 1353 | |
| 1354 | /* Set up the handler for the data request signal, and set the initial |
| 1355 | descriptive text. */ |
| 1356 | |
| 1357 | set_process_info("initializing"); |
| 1358 | os_restarting_signal(SIGUSR1, usr1_handler); |
| 1359 | |
| 1360 | /* SIGHUP is used to get the daemon to reconfigure. It gets set as appropriate |
| 1361 | in the daemon code. For the rest of Exim's uses, we ignore it. */ |
| 1362 | |
| 1363 | signal(SIGHUP, SIG_IGN); |
| 1364 | |
| 1365 | /* We don't want to die on pipe errors as the code is written to handle |
| 1366 | the write error instead. */ |
| 1367 | |
| 1368 | signal(SIGPIPE, SIG_IGN); |
| 1369 | |
| 1370 | /* Under some circumstance on some OS, Exim can get called with SIGCHLD |
| 1371 | set to SIG_IGN. This causes subprocesses that complete before the parent |
| 1372 | process waits for them not to hang around, so when Exim calls wait(), nothing |
| 1373 | is there. The wait() code has been made robust against this, but let's ensure |
| 1374 | that SIGCHLD is set to SIG_DFL, because it's tidier to wait and get a process |
| 1375 | ending status. We use sigaction rather than plain signal() on those OS where |
| 1376 | SA_NOCLDWAIT exists, because we want to be sure it is turned off. (There was a |
| 1377 | problem on AIX with this.) */ |
| 1378 | |
| 1379 | #ifdef SA_NOCLDWAIT |
| 1380 | { |
| 1381 | struct sigaction act; |
| 1382 | act.sa_handler = SIG_DFL; |
| 1383 | sigemptyset(&(act.sa_mask)); |
| 1384 | act.sa_flags = 0; |
| 1385 | sigaction(SIGCHLD, &act, NULL); |
| 1386 | } |
| 1387 | #else |
| 1388 | signal(SIGCHLD, SIG_DFL); |
| 1389 | #endif |
| 1390 | |
| 1391 | /* Save the arguments for use if we re-exec exim as a daemon after receiving |
| 1392 | SIGHUP. */ |
| 1393 | |
| 1394 | sighup_argv = argv; |
| 1395 | |
| 1396 | /* Set up the version number. Set up the leading 'E' for the external form of |
| 1397 | message ids, set the pointer to the internal form, and initialize it to |
| 1398 | indicate no message being processed. */ |
| 1399 | |
| 1400 | version_init(); |
| 1401 | message_id_option[0] = '-'; |
| 1402 | message_id_external = message_id_option + 1; |
| 1403 | message_id_external[0] = 'E'; |
| 1404 | message_id = message_id_external + 1; |
| 1405 | message_id[0] = 0; |
| 1406 | |
| 1407 | /* Set the umask to zero so that any files that Exim creates are created |
| 1408 | with the modes that it specifies. */ |
| 1409 | |
| 1410 | umask(0); |
| 1411 | |
| 1412 | /* Precompile the regular expression for matching a message id. Keep this in |
| 1413 | step with the code that generates ids in the accept.c module. We need to do |
| 1414 | this here, because the -M options check their arguments for syntactic validity |
| 1415 | using mac_ismsgid, which uses this. */ |
| 1416 | |
| 1417 | regex_ismsgid = |
| 1418 | regex_must_compile(US"^(?:[^\\W_]{6}-){2}[^\\W_]{2}$", FALSE, TRUE); |
| 1419 | |
| 1420 | /* If the program is called as "mailq" treat it as equivalent to "exim -bp"; |
| 1421 | this seems to be a generally accepted convention, since one finds symbolic |
| 1422 | links called "mailq" in standard OS configurations. */ |
| 1423 | |
| 1424 | if ((namelen == 5 && Ustrcmp(argv[0], "mailq") == 0) || |
| 1425 | (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/mailq", 6) == 0)) |
| 1426 | { |
| 1427 | list_queue = TRUE; |
| 1428 | receiving_message = FALSE; |
| 1429 | called_as = US"-mailq"; |
| 1430 | } |
| 1431 | |
| 1432 | /* If the program is called as "rmail" treat it as equivalent to |
| 1433 | "exim -i -oee", thus allowing UUCP messages to be input using non-SMTP mode, |
| 1434 | i.e. preventing a single dot on a line from terminating the message, and |
| 1435 | returning with zero return code, even in cases of error (provided an error |
| 1436 | message has been sent). */ |
| 1437 | |
| 1438 | if ((namelen == 5 && Ustrcmp(argv[0], "rmail") == 0) || |
| 1439 | (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/rmail", 6) == 0)) |
| 1440 | { |
| 1441 | dot_ends = FALSE; |
| 1442 | called_as = US"-rmail"; |
| 1443 | errors_sender_rc = EXIT_SUCCESS; |
| 1444 | } |
| 1445 | |
| 1446 | /* If the program is called as "rsmtp" treat it as equivalent to "exim -bS"; |
| 1447 | this is a smail convention. */ |
| 1448 | |
| 1449 | if ((namelen == 5 && Ustrcmp(argv[0], "rsmtp") == 0) || |
| 1450 | (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/rsmtp", 6) == 0)) |
| 1451 | { |
| 1452 | smtp_input = smtp_batched_input = TRUE; |
| 1453 | called_as = US"-rsmtp"; |
| 1454 | } |
| 1455 | |
| 1456 | /* If the program is called as "runq" treat it as equivalent to "exim -q"; |
| 1457 | this is a smail convention. */ |
| 1458 | |
| 1459 | if ((namelen == 4 && Ustrcmp(argv[0], "runq") == 0) || |
| 1460 | (namelen > 4 && Ustrncmp(argv[0] + namelen - 5, "/runq", 5) == 0)) |
| 1461 | { |
| 1462 | queue_interval = 0; |
| 1463 | receiving_message = FALSE; |
| 1464 | called_as = US"-runq"; |
| 1465 | } |
| 1466 | |
| 1467 | /* If the program is called as "newaliases" treat it as equivalent to |
| 1468 | "exim -bi"; this is a sendmail convention. */ |
| 1469 | |
| 1470 | if ((namelen == 10 && Ustrcmp(argv[0], "newaliases") == 0) || |
| 1471 | (namelen > 10 && Ustrncmp(argv[0] + namelen - 11, "/newaliases", 11) == 0)) |
| 1472 | { |
| 1473 | bi_option = TRUE; |
| 1474 | receiving_message = FALSE; |
| 1475 | called_as = US"-newaliases"; |
| 1476 | } |
| 1477 | |
| 1478 | /* Save the original effective uid for a couple of uses later. It should |
| 1479 | normally be root, but in some esoteric environments it may not be. */ |
| 1480 | |
| 1481 | original_euid = geteuid(); |
| 1482 | |
| 1483 | /* Get the real uid and gid. If the caller is root, force the effective uid/gid |
| 1484 | to be the same as the real ones. This makes a difference only if Exim is setuid |
| 1485 | (or setgid) to something other than root, which could be the case in some |
| 1486 | special configurations. */ |
| 1487 | |
| 1488 | real_uid = getuid(); |
| 1489 | real_gid = getgid(); |
| 1490 | |
| 1491 | if (real_uid == root_uid) |
| 1492 | { |
| 1493 | setgid(real_gid); |
| 1494 | setuid(real_uid); |
| 1495 | } |
| 1496 | |
| 1497 | /* If neither the original real uid nor the original euid was root, Exim is |
| 1498 | running in an unprivileged state. */ |
| 1499 | |
| 1500 | unprivileged = (real_uid != root_uid && original_euid != root_uid); |
| 1501 | |
| 1502 | /* If the first argument is --help, pretend there are no arguments. This will |
| 1503 | cause a brief message to be given. */ |
| 1504 | |
| 1505 | if (argc > 1 && Ustrcmp(argv[1], "--help") == 0) argc = 1; |
| 1506 | |
| 1507 | /* Scan the program's arguments. Some can be dealt with right away; others are |
| 1508 | simply recorded for checking and handling afterwards. Do a high-level switch |
| 1509 | on the second character (the one after '-'), to save some effort. */ |
| 1510 | |
| 1511 | for (i = 1; i < argc; i++) |
| 1512 | { |
| 1513 | BOOL badarg = FALSE; |
| 1514 | uschar *arg = argv[i]; |
| 1515 | uschar *argrest; |
| 1516 | int switchchar; |
| 1517 | |
| 1518 | /* An argument not starting with '-' is the start of a recipients list; |
| 1519 | break out of the options-scanning loop. */ |
| 1520 | |
| 1521 | if (arg[0] != '-') |
| 1522 | { |
| 1523 | recipients_arg = i; |
| 1524 | break; |
| 1525 | } |
| 1526 | |
| 1527 | /* An option consistion of -- terminates the options */ |
| 1528 | |
| 1529 | if (Ustrcmp(arg, "--") == 0) |
| 1530 | { |
| 1531 | recipients_arg = i + 1; |
| 1532 | break; |
| 1533 | } |
| 1534 | |
| 1535 | /* Handle flagged options */ |
| 1536 | |
| 1537 | switchchar = arg[1]; |
| 1538 | argrest = arg+2; |
| 1539 | |
| 1540 | /* Make all -ex options synonymous with -oex arguments, since that |
| 1541 | is assumed by various callers. Also make -qR options synonymous with -R |
| 1542 | options, as that seems to be required as well. Allow for -qqR too, and |
| 1543 | the same for -S options. */ |
| 1544 | |
| 1545 | if (Ustrncmp(arg+1, "oe", 2) == 0 || |
| 1546 | Ustrncmp(arg+1, "qR", 2) == 0 || |
| 1547 | Ustrncmp(arg+1, "qS", 2) == 0) |
| 1548 | { |
| 1549 | switchchar = arg[2]; |
| 1550 | argrest++; |
| 1551 | } |
| 1552 | else if (Ustrncmp(arg+1, "qqR", 3) == 0 || Ustrncmp(arg+1, "qqS", 3) == 0) |
| 1553 | { |
| 1554 | switchchar = arg[3]; |
| 1555 | argrest += 2; |
| 1556 | queue_2stage = TRUE; |
| 1557 | } |
| 1558 | |
| 1559 | /* Make -r synonymous with -f, since it is a documented alias */ |
| 1560 | |
| 1561 | else if (arg[1] == 'r') switchchar = 'f'; |
| 1562 | |
| 1563 | /* Make -ov synonymous with -v */ |
| 1564 | |
| 1565 | else if (Ustrcmp(arg, "-ov") == 0) |
| 1566 | { |
| 1567 | switchchar = 'v'; |
| 1568 | argrest++; |
| 1569 | } |
| 1570 | |
| 1571 | /* High-level switch on active initial letter */ |
| 1572 | |
| 1573 | switch(switchchar) |
| 1574 | { |
| 1575 | /* -Btype is a sendmail option for 7bit/8bit setting. Exim is 8-bit clean |
| 1576 | so has no need of it. */ |
| 1577 | |
| 1578 | case 'B': |
| 1579 | if (*argrest == 0) i++; /* Skip over the type */ |
| 1580 | break; |
| 1581 | |
| 1582 | |
| 1583 | case 'b': |
| 1584 | receiving_message = FALSE; /* Reset TRUE for -bm, -bS, -bs below */ |
| 1585 | |
| 1586 | /* -bd: Run in daemon mode, awaiting SMTP connections. |
| 1587 | -bdf: Ditto, but in the foreground. |
| 1588 | */ |
| 1589 | |
| 1590 | if (*argrest == 'd') |
| 1591 | { |
| 1592 | daemon_listen = TRUE; |
| 1593 | if (*(++argrest) == 'f') background_daemon = FALSE; |
| 1594 | else if (*argrest != 0) { badarg = TRUE; break; } |
| 1595 | } |
| 1596 | |
| 1597 | /* -be: Run in expansion test mode */ |
| 1598 | |
| 1599 | else if (*argrest == 'e') |
| 1600 | expansion_test = checking = TRUE; |
| 1601 | |
| 1602 | /* -bF: Run system filter test */ |
| 1603 | |
| 1604 | else if (*argrest == 'F') |
| 1605 | { |
| 1606 | filter_test |= FTEST_SYSTEM; |
| 1607 | if (*(++argrest) != 0) { badarg = TRUE; break; } |
| 1608 | if (++i < argc) filter_test_sfile = argv[i]; else |
| 1609 | { |
| 1610 | fprintf(stderr, "exim: file name expected after %s\n", argv[i-1]); |
| 1611 | exit(EXIT_FAILURE); |
| 1612 | } |
| 1613 | } |
| 1614 | |
| 1615 | /* -bf: Run user filter test |
| 1616 | -bfd: Set domain for filter testing |
| 1617 | -bfl: Set local part for filter testing |
| 1618 | -bfp: Set prefix for filter testing |
| 1619 | -bfs: Set suffix for filter testing |
| 1620 | */ |
| 1621 | |
| 1622 | else if (*argrest == 'f') |
| 1623 | { |
| 1624 | if (*(++argrest) == 0) |
| 1625 | { |
| 1626 | filter_test |= FTEST_USER; |
| 1627 | if (++i < argc) filter_test_ufile = argv[i]; else |
| 1628 | { |
| 1629 | fprintf(stderr, "exim: file name expected after %s\n", argv[i-1]); |
| 1630 | exit(EXIT_FAILURE); |
| 1631 | } |
| 1632 | } |
| 1633 | else |
| 1634 | { |
| 1635 | if (++i >= argc) |
| 1636 | { |
| 1637 | fprintf(stderr, "exim: string expected after %s\n", arg); |
| 1638 | exit(EXIT_FAILURE); |
| 1639 | } |
| 1640 | if (Ustrcmp(argrest, "d") == 0) ftest_domain = argv[i]; |
| 1641 | else if (Ustrcmp(argrest, "l") == 0) ftest_localpart = argv[i]; |
| 1642 | else if (Ustrcmp(argrest, "p") == 0) ftest_prefix = argv[i]; |
| 1643 | else if (Ustrcmp(argrest, "s") == 0) ftest_suffix = argv[i]; |
| 1644 | else { badarg = TRUE; break; } |
| 1645 | } |
| 1646 | } |
| 1647 | |
| 1648 | /* -bh: Host checking - an IP address must follow. */ |
| 1649 | |
| 1650 | else if (Ustrcmp(argrest, "h") == 0 || Ustrcmp(argrest, "hc") == 0) |
| 1651 | { |
| 1652 | if (++i >= argc) { badarg = TRUE; break; } |
| 1653 | sender_host_address = argv[i]; |
| 1654 | host_checking = checking = log_testing_mode = TRUE; |
| 1655 | host_checking_callout = argrest[1] == 'c'; |
| 1656 | } |
| 1657 | |
| 1658 | /* -bi: This option is used by sendmail to initialize *the* alias file, |
| 1659 | though it has the -oA option to specify a different file. Exim has no |
| 1660 | concept of *the* alias file, but since Sun's YP make script calls |
| 1661 | sendmail this way, some support must be provided. */ |
| 1662 | |
| 1663 | else if (Ustrcmp(argrest, "i") == 0) bi_option = TRUE; |
| 1664 | |
| 1665 | /* -bm: Accept and deliver message - the default option. Reinstate |
| 1666 | receiving_message, which got turned off for all -b options. */ |
| 1667 | |
| 1668 | else if (Ustrcmp(argrest, "m") == 0) receiving_message = TRUE; |
| 1669 | |
| 1670 | /* -bnq: For locally originating messages, do not qualify unqualified |
| 1671 | addresses. In the envelope, this causes errors; in header lines they |
| 1672 | just get left. */ |
| 1673 | |
| 1674 | else if (Ustrcmp(argrest, "nq") == 0) |
| 1675 | { |
| 1676 | allow_unqualified_sender = FALSE; |
| 1677 | allow_unqualified_recipient = FALSE; |
| 1678 | } |
| 1679 | |
| 1680 | /* -bpxx: List the contents of the mail queue, in various forms. If |
| 1681 | the option is -bpc, just a queue count is needed. Otherwise, if the |
| 1682 | first letter after p is r, then order is random. */ |
| 1683 | |
| 1684 | else if (*argrest == 'p') |
| 1685 | { |
| 1686 | if (*(++argrest) == 'c') |
| 1687 | { |
| 1688 | count_queue = TRUE; |
| 1689 | if (*(++argrest) != 0) badarg = TRUE; |
| 1690 | break; |
| 1691 | } |
| 1692 | |
| 1693 | if (*argrest == 'r') |
| 1694 | { |
| 1695 | list_queue_option = 8; |
| 1696 | argrest++; |
| 1697 | } |
| 1698 | else list_queue_option = 0; |
| 1699 | |
| 1700 | list_queue = TRUE; |
| 1701 | |
| 1702 | /* -bp: List the contents of the mail queue, top-level only */ |
| 1703 | |
| 1704 | if (*argrest == 0) {} |
| 1705 | |
| 1706 | /* -bpu: List the contents of the mail queue, top-level undelivered */ |
| 1707 | |
| 1708 | else if (Ustrcmp(argrest, "u") == 0) list_queue_option += 1; |
| 1709 | |
| 1710 | /* -bpa: List the contents of the mail queue, including all delivered */ |
| 1711 | |
| 1712 | else if (Ustrcmp(argrest, "a") == 0) list_queue_option += 2; |
| 1713 | |
| 1714 | /* Unknown after -bp[r] */ |
| 1715 | |
| 1716 | else |
| 1717 | { |
| 1718 | badarg = TRUE; |
| 1719 | break; |
| 1720 | } |
| 1721 | } |
| 1722 | |
| 1723 | |
| 1724 | /* -bP: List the configuration variables given as the address list. |
| 1725 | Force -v, so configuration errors get displayed. */ |
| 1726 | |
| 1727 | else if (Ustrcmp(argrest, "P") == 0) |
| 1728 | { |
| 1729 | list_options = TRUE; |
| 1730 | debug_selector |= D_v; |
| 1731 | debug_file = stderr; |
| 1732 | } |
| 1733 | |
| 1734 | /* -brt: Test retry configuration lookup */ |
| 1735 | |
| 1736 | else if (Ustrcmp(argrest, "rt") == 0) |
| 1737 | { |
| 1738 | test_retry_arg = i + 1; |
| 1739 | goto END_ARG; |
| 1740 | } |
| 1741 | |
| 1742 | /* -brw: Test rewrite configuration */ |
| 1743 | |
| 1744 | else if (Ustrcmp(argrest, "rw") == 0) |
| 1745 | { |
| 1746 | test_rewrite_arg = i + 1; |
| 1747 | goto END_ARG; |
| 1748 | } |
| 1749 | |
| 1750 | /* -bS: Read SMTP commands on standard input, but produce no replies - |
| 1751 | all errors are reported by sending messages. */ |
| 1752 | |
| 1753 | else if (Ustrcmp(argrest, "S") == 0) |
| 1754 | smtp_input = smtp_batched_input = receiving_message = TRUE; |
| 1755 | |
| 1756 | /* -bs: Read SMTP commands on standard input and produce SMTP replies |
| 1757 | on standard output. */ |
| 1758 | |
| 1759 | else if (Ustrcmp(argrest, "s") == 0) smtp_input = receiving_message = TRUE; |
| 1760 | |
| 1761 | /* -bt: address testing mode */ |
| 1762 | |
| 1763 | else if (Ustrcmp(argrest, "t") == 0) |
| 1764 | address_test_mode = checking = log_testing_mode = TRUE; |
| 1765 | |
| 1766 | /* -bv: verify addresses */ |
| 1767 | |
| 1768 | else if (Ustrcmp(argrest, "v") == 0) |
| 1769 | verify_address_mode = checking = log_testing_mode = TRUE; |
| 1770 | |
| 1771 | /* -bvs: verify sender addresses */ |
| 1772 | |
| 1773 | else if (Ustrcmp(argrest, "vs") == 0) |
| 1774 | { |
| 1775 | verify_address_mode = checking = log_testing_mode = TRUE; |
| 1776 | verify_as_sender = TRUE; |
| 1777 | } |
| 1778 | |
| 1779 | /* -bV: Print version string and support details */ |
| 1780 | |
| 1781 | else if (Ustrcmp(argrest, "V") == 0) |
| 1782 | { |
| 1783 | printf("Exim version %s #%s built %s\n", version_string, |
| 1784 | version_cnumber, version_date); |
| 1785 | printf("%s\n", CS version_copyright); |
| 1786 | version_printed = TRUE; |
| 1787 | show_whats_supported(stdout); |
| 1788 | } |
| 1789 | |
| 1790 | else badarg = TRUE; |
| 1791 | break; |
| 1792 | |
| 1793 | |
| 1794 | /* -C: change configuration file list; ignore if it isn't really |
| 1795 | a change! Enforce a prefix check if required. */ |
| 1796 | |
| 1797 | case 'C': |
| 1798 | if (*argrest == 0) |
| 1799 | { |
| 1800 | if(++i < argc) argrest = argv[i]; else |
| 1801 | { badarg = TRUE; break; } |
| 1802 | } |
| 1803 | if (Ustrcmp(config_main_filelist, argrest) != 0) |
| 1804 | { |
| 1805 | #ifdef ALT_CONFIG_PREFIX |
| 1806 | int sep = 0; |
| 1807 | int len = Ustrlen(ALT_CONFIG_PREFIX); |
| 1808 | uschar *list = argrest; |
| 1809 | uschar *filename; |
| 1810 | while((filename = string_nextinlist(&list, &sep, big_buffer, |
| 1811 | big_buffer_size)) != NULL) |
| 1812 | { |
| 1813 | if ((Ustrlen(filename) < len || |
| 1814 | Ustrncmp(filename, ALT_CONFIG_PREFIX, len) != 0 || |
| 1815 | Ustrstr(filename, "/../") != NULL) && |
| 1816 | (Ustrcmp(filename, "/dev/null") != 0 || real_uid != root_uid)) |
| 1817 | { |
| 1818 | fprintf(stderr, "-C Permission denied\n"); |
| 1819 | exit(EXIT_FAILURE); |
| 1820 | } |
| 1821 | } |
| 1822 | #endif |
| 1823 | |
| 1824 | config_main_filelist = argrest; |
| 1825 | config_changed = TRUE; |
| 1826 | } |
| 1827 | break; |
| 1828 | |
| 1829 | |
| 1830 | /* -D: set up a macro definition */ |
| 1831 | |
| 1832 | case 'D': |
| 1833 | #ifdef DISABLE_D_OPTION |
| 1834 | fprintf(stderr, "exim: -D is not available in this Exim binary\n"); |
| 1835 | exit(EXIT_FAILURE); |
| 1836 | #else |
| 1837 | { |
| 1838 | int ptr = 0; |
| 1839 | macro_item *mlast = NULL; |
| 1840 | macro_item *m; |
| 1841 | uschar name[24]; |
| 1842 | uschar *s = argrest; |
| 1843 | |
| 1844 | while (isspace(*s)) s++; |
| 1845 | |
| 1846 | if (*s < 'A' || *s > 'Z') |
| 1847 | { |
| 1848 | fprintf(stderr, "exim: macro name set by -D must start with " |
| 1849 | "an upper case letter\n"); |
| 1850 | exit(EXIT_FAILURE); |
| 1851 | } |
| 1852 | |
| 1853 | while (isalnum(*s) || *s == '_') |
| 1854 | { |
| 1855 | if (ptr < sizeof(name)-1) name[ptr++] = *s; |
| 1856 | s++; |
| 1857 | } |
| 1858 | name[ptr] = 0; |
| 1859 | if (ptr == 0) { badarg = TRUE; break; } |
| 1860 | while (isspace(*s)) s++; |
| 1861 | if (*s != 0) |
| 1862 | { |
| 1863 | if (*s++ != '=') { badarg = TRUE; break; } |
| 1864 | while (isspace(*s)) s++; |
| 1865 | } |
| 1866 | |
| 1867 | for (m = macros; m != NULL; m = m->next) |
| 1868 | { |
| 1869 | if (Ustrcmp(m->name, name) == 0) |
| 1870 | { |
| 1871 | fprintf(stderr, "exim: duplicated -D in command line\n"); |
| 1872 | exit(EXIT_FAILURE); |
| 1873 | } |
| 1874 | mlast = m; |
| 1875 | } |
| 1876 | |
| 1877 | m = store_get(sizeof(macro_item) + Ustrlen(name)); |
| 1878 | m->next = NULL; |
| 1879 | m->command_line = TRUE; |
| 1880 | if (mlast == NULL) macros = m; else mlast->next = m; |
| 1881 | Ustrcpy(m->name, name); |
| 1882 | m->replacement = string_copy(s); |
| 1883 | |
| 1884 | if (clmacro_count >= MAX_CLMACROS) |
| 1885 | { |
| 1886 | fprintf(stderr, "exim: too many -D options on command line\n"); |
| 1887 | exit(EXIT_FAILURE); |
| 1888 | } |
| 1889 | clmacros[clmacro_count++] = string_sprintf("-D%s=%s", m->name, |
| 1890 | m->replacement); |
| 1891 | } |
| 1892 | #endif |
| 1893 | break; |
| 1894 | |
| 1895 | /* -d: Set debug level (see also -v below) or set the drop_cr option. |
| 1896 | The latter is now a no-op, retained for compatibility only. If -dd is used, |
| 1897 | debugging subprocesses of the daemon is disabled. */ |
| 1898 | |
| 1899 | case 'd': |
| 1900 | if (Ustrcmp(argrest, "ropcr") == 0) |
| 1901 | { |
| 1902 | /* drop_cr = TRUE; */ |
| 1903 | } |
| 1904 | |
| 1905 | /* Use an intermediate variable so that we don't set debugging while |
| 1906 | decoding the debugging bits. */ |
| 1907 | |
| 1908 | else |
| 1909 | { |
| 1910 | unsigned int selector = D_default; |
| 1911 | debug_selector = 0; |
| 1912 | debug_file = NULL; |
| 1913 | if (*argrest == 'd') |
| 1914 | { |
| 1915 | debug_daemon = TRUE; |
| 1916 | argrest++; |
| 1917 | } |
| 1918 | if (*argrest != 0) |
| 1919 | decode_bits(&selector, NULL, argrest, debug_options, |
| 1920 | debug_options_count, US"debug"); |
| 1921 | debug_selector = selector; |
| 1922 | } |
| 1923 | break; |
| 1924 | |
| 1925 | |
| 1926 | /* -E: This is a local error message. This option is not intended for |
| 1927 | external use at all, but is not restricted to trusted callers because it |
| 1928 | does no harm (just suppresses certain error messages) and if Exim is run |
| 1929 | not setuid root it won't always be trusted when it generates error |
| 1930 | messages using this option. If there is a message id following -E, point |
| 1931 | message_reference at it, for logging. */ |
| 1932 | |
| 1933 | case 'E': |
| 1934 | local_error_message = TRUE; |
| 1935 | if (mac_ismsgid(argrest)) message_reference = argrest; |
| 1936 | break; |
| 1937 | |
| 1938 | |
| 1939 | /* -ex: The vacation program calls sendmail with the undocumented "-eq" |
| 1940 | option, so it looks as if historically the -oex options are also callable |
| 1941 | without the leading -o. So we have to accept them. Before the switch, |
| 1942 | anything starting -oe has been converted to -e. Exim does not support all |
| 1943 | of the sendmail error options. */ |
| 1944 | |
| 1945 | case 'e': |
| 1946 | if (Ustrcmp(argrest, "e") == 0) |
| 1947 | { |
| 1948 | arg_error_handling = ERRORS_SENDER; |
| 1949 | errors_sender_rc = EXIT_SUCCESS; |
| 1950 | } |
| 1951 | else if (Ustrcmp(argrest, "m") == 0) arg_error_handling = ERRORS_SENDER; |
| 1952 | else if (Ustrcmp(argrest, "p") == 0) arg_error_handling = ERRORS_STDERR; |
| 1953 | else if (Ustrcmp(argrest, "q") == 0) arg_error_handling = ERRORS_STDERR; |
| 1954 | else if (Ustrcmp(argrest, "w") == 0) arg_error_handling = ERRORS_SENDER; |
| 1955 | else badarg = TRUE; |
| 1956 | break; |
| 1957 | |
| 1958 | |
| 1959 | /* -F: Set sender's full name, used instead of the gecos entry from |
| 1960 | the password file. Since users can usually alter their gecos entries, |
| 1961 | there's no security involved in using this instead. The data can follow |
| 1962 | the -F or be in the next argument. */ |
| 1963 | |
| 1964 | case 'F': |
| 1965 | if (*argrest == 0) |
| 1966 | { |
| 1967 | if(++i < argc) argrest = argv[i]; else |
| 1968 | { badarg = TRUE; break; } |
| 1969 | } |
| 1970 | originator_name = argrest; |
| 1971 | break; |
| 1972 | |
| 1973 | |
| 1974 | /* -f: Set sender's address - this value is only actually used if Exim is |
| 1975 | run by a trusted user, or if untrusted_set_sender is set and matches the |
| 1976 | address, except that the null address can always be set by any user. The |
| 1977 | test for this happens later, when the value given here is ignored when not |
| 1978 | permitted. For an untrusted user, the actual sender is still put in Sender: |
| 1979 | if it doesn't match the From: header (unless no_local_from_check is set). |
| 1980 | The data can follow the -f or be in the next argument. The -r switch is an |
| 1981 | obsolete form of -f but since there appear to be programs out there that |
| 1982 | use anything that sendmail has ever supported, better accept it - the |
| 1983 | synonymizing is done before the switch above. |
| 1984 | |
| 1985 | At this stage, we must allow domain literal addresses, because we don't |
| 1986 | know what the setting of allow_domain_literals is yet. Ditto for trailing |
| 1987 | dots and strip_trailing_dot. */ |
| 1988 | |
| 1989 | case 'f': |
| 1990 | { |
| 1991 | int start, end; |
| 1992 | uschar *errmess; |
| 1993 | if (*argrest == 0) |
| 1994 | { |
| 1995 | if (i+1 < argc) argrest = argv[++i]; else |
| 1996 | { badarg = TRUE; break; } |
| 1997 | } |
| 1998 | if (*argrest == 0) |
| 1999 | { |
| 2000 | sender_address = string_sprintf(""); /* Ensure writeable memory */ |
| 2001 | } |
| 2002 | else |
| 2003 | { |
| 2004 | uschar *temp = argrest + Ustrlen(argrest) - 1; |
| 2005 | while (temp >= argrest && isspace(*temp)) temp--; |
| 2006 | if (temp >= argrest && *temp == '.') f_end_dot = TRUE; |
| 2007 | allow_domain_literals = TRUE; |
| 2008 | strip_trailing_dot = TRUE; |
| 2009 | sender_address = parse_extract_address(argrest, &errmess, &start, &end, |
| 2010 | &sender_address_domain, TRUE); |
| 2011 | allow_domain_literals = FALSE; |
| 2012 | strip_trailing_dot = FALSE; |
| 2013 | if (sender_address == NULL) |
| 2014 | { |
| 2015 | fprintf(stderr, "exim: bad -f address \"%s\": %s\n", argrest, errmess); |
| 2016 | return EXIT_FAILURE; |
| 2017 | } |
| 2018 | } |
| 2019 | sender_address_forced = TRUE; |
| 2020 | } |
| 2021 | break; |
| 2022 | |
| 2023 | /* This is some Sendmail thing which can be ignored */ |
| 2024 | |
| 2025 | case 'G': |
| 2026 | break; |
| 2027 | |
| 2028 | /* -h: Set the hop count for an incoming message. Exim does not currently |
| 2029 | support this; it always computes it by counting the Received: headers. |
| 2030 | To put it in will require a change to the spool header file format. */ |
| 2031 | |
| 2032 | case 'h': |
| 2033 | if (*argrest == 0) |
| 2034 | { |
| 2035 | if(++i < argc) argrest = argv[i]; else |
| 2036 | { badarg = TRUE; break; } |
| 2037 | } |
| 2038 | if (!isdigit(*argrest)) badarg = TRUE; |
| 2039 | break; |
| 2040 | |
| 2041 | |
| 2042 | /* -i: Set flag so dot doesn't end non-SMTP input (same as -oi, seems |
| 2043 | not to be documented for sendmail but mailx (at least) uses it) */ |
| 2044 | |
| 2045 | case 'i': |
| 2046 | if (*argrest == 0) dot_ends = FALSE; else badarg = TRUE; |
| 2047 | break; |
| 2048 | |
| 2049 | |
| 2050 | case 'M': |
| 2051 | receiving_message = FALSE; |
| 2052 | |
| 2053 | /* -MC: continue delivery of another message via an existing open |
| 2054 | file descriptor. This option is used for an internal call by the |
| 2055 | smtp transport when there is a pending message waiting to go to an |
| 2056 | address to which it has got a connection. Five subsequent arguments are |
| 2057 | required: transport name, host name, IP address, sequence number, and |
| 2058 | message_id. Transports may decline to create new processes if the sequence |
| 2059 | number gets too big. The channel is stdin. This (-MC) must be the last |
| 2060 | argument. There's a subsequent check that the real-uid is privileged. |
| 2061 | |
| 2062 | If we are running in the test harness. delay for a bit, to let the process |
| 2063 | that set this one up complete. This makes for repeatability of the logging, |
| 2064 | etc. output. */ |
| 2065 | |
| 2066 | if (Ustrcmp(argrest, "C") == 0) |
| 2067 | { |
| 2068 | if (argc != i + 6) |
| 2069 | { |
| 2070 | fprintf(stderr, "exim: too many or too few arguments after -MC\n"); |
| 2071 | return EXIT_FAILURE; |
| 2072 | } |
| 2073 | |
| 2074 | if (msg_action_arg >= 0) |
| 2075 | { |
| 2076 | fprintf(stderr, "exim: incompatible arguments\n"); |
| 2077 | return EXIT_FAILURE; |
| 2078 | } |
| 2079 | |
| 2080 | continue_transport = argv[++i]; |
| 2081 | continue_hostname = argv[++i]; |
| 2082 | continue_host_address = argv[++i]; |
| 2083 | continue_sequence = Uatoi(argv[++i]); |
| 2084 | msg_action = MSG_DELIVER; |
| 2085 | msg_action_arg = ++i; |
| 2086 | forced_delivery = TRUE; |
| 2087 | queue_run_pid = passed_qr_pid; |
| 2088 | queue_run_pipe = passed_qr_pipe; |
| 2089 | |
| 2090 | if (!mac_ismsgid(argv[i])) |
| 2091 | { |
| 2092 | fprintf(stderr, "exim: malformed message id %s after -MC option\n", |
| 2093 | argv[i]); |
| 2094 | return EXIT_FAILURE; |
| 2095 | } |
| 2096 | |
| 2097 | if (running_in_test_harness) millisleep(500); |
| 2098 | break; |
| 2099 | } |
| 2100 | |
| 2101 | /* -MCA: set the smtp_authenticated flag; this is useful only when it |
| 2102 | precedes -MC (see above). The flag indicates that the host to which |
| 2103 | Exim is connected has accepted an AUTH sequence. */ |
| 2104 | |
| 2105 | else if (Ustrcmp(argrest, "CA") == 0) |
| 2106 | { |
| 2107 | smtp_authenticated = TRUE; |
| 2108 | break; |
| 2109 | } |
| 2110 | |
| 2111 | /* -MCP: set the smtp_use_pipelining flag; this is useful only when |
| 2112 | it preceded -MC (see above) */ |
| 2113 | |
| 2114 | else if (Ustrcmp(argrest, "CP") == 0) |
| 2115 | { |
| 2116 | smtp_use_pipelining = TRUE; |
| 2117 | break; |
| 2118 | } |
| 2119 | |
| 2120 | /* -MCQ: pass on the pid of the queue-running process that started |
| 2121 | this chain of deliveries and the fd of its synchronizing pipe; this |
| 2122 | is useful only when it precedes -MC (see above) */ |
| 2123 | |
| 2124 | else if (Ustrcmp(argrest, "CQ") == 0) |
| 2125 | { |
| 2126 | if(++i < argc) passed_qr_pid = (pid_t)(Uatol(argv[i])); |
| 2127 | else badarg = TRUE; |
| 2128 | if(++i < argc) passed_qr_pipe = (int)(Uatol(argv[i])); |
| 2129 | else badarg = TRUE; |
| 2130 | break; |
| 2131 | } |
| 2132 | |
| 2133 | /* -MCS: set the smtp_use_size flag; this is useful only when it |
| 2134 | precedes -MC (see above) */ |
| 2135 | |
| 2136 | else if (Ustrcmp(argrest, "CS") == 0) |
| 2137 | { |
| 2138 | smtp_use_size = TRUE; |
| 2139 | break; |
| 2140 | } |
| 2141 | |
| 2142 | /* -MCT: set the tls_offered flag; this is useful only when it |
| 2143 | precedes -MC (see above). The flag indicates that the host to which |
| 2144 | Exim is connected has offered TLS support. */ |
| 2145 | |
| 2146 | #ifdef SUPPORT_TLS |
| 2147 | else if (Ustrcmp(argrest, "CT") == 0) |
| 2148 | { |
| 2149 | tls_offered = TRUE; |
| 2150 | break; |
| 2151 | } |
| 2152 | #endif |
| 2153 | |
| 2154 | /* -M[x]: various operations on the following list of message ids: |
| 2155 | -M deliver the messages, ignoring next retry times and thawing |
| 2156 | -Mc deliver the messages, checking next retry times, no thawing |
| 2157 | -Mf freeze the messages |
| 2158 | -Mg give up on the messages |
| 2159 | -Mt thaw the messages |
| 2160 | -Mrm remove the messages |
| 2161 | In the above cases, this must be the last option. There are also the |
| 2162 | following options which are followed by a single message id, and which |
| 2163 | act on that message. Some of them use the "recipient" addresses as well. |
| 2164 | -Mar add recipient(s) |
| 2165 | -Mmad mark all recipients delivered |
| 2166 | -Mmd mark recipients(s) delivered |
| 2167 | -Mes edit sender |
| 2168 | -Mvb show body |
| 2169 | -Mvh show header |
| 2170 | -Mvl show log |
| 2171 | */ |
| 2172 | |
| 2173 | else if (*argrest == 0) |
| 2174 | { |
| 2175 | msg_action = MSG_DELIVER; |
| 2176 | forced_delivery = deliver_force_thaw = TRUE; |
| 2177 | } |
| 2178 | else if (Ustrcmp(argrest, "ar") == 0) |
| 2179 | { |
| 2180 | msg_action = MSG_ADD_RECIPIENT; |
| 2181 | one_msg_action = TRUE; |
| 2182 | } |
| 2183 | else if (Ustrcmp(argrest, "c") == 0) msg_action = MSG_DELIVER; |
| 2184 | else if (Ustrcmp(argrest, "es") == 0) |
| 2185 | { |
| 2186 | msg_action = MSG_EDIT_SENDER; |
| 2187 | one_msg_action = TRUE; |
| 2188 | } |
| 2189 | else if (Ustrcmp(argrest, "f") == 0) msg_action = MSG_FREEZE; |
| 2190 | else if (Ustrcmp(argrest, "g") == 0) |
| 2191 | { |
| 2192 | msg_action = MSG_DELIVER; |
| 2193 | deliver_give_up = TRUE; |
| 2194 | } |
| 2195 | else if (Ustrcmp(argrest, "mad") == 0) |
| 2196 | { |
| 2197 | msg_action = MSG_MARK_ALL_DELIVERED; |
| 2198 | } |
| 2199 | else if (Ustrcmp(argrest, "md") == 0) |
| 2200 | { |
| 2201 | msg_action = MSG_MARK_DELIVERED; |
| 2202 | one_msg_action = TRUE; |
| 2203 | } |
| 2204 | else if (Ustrcmp(argrest, "rm") == 0) msg_action = MSG_REMOVE; |
| 2205 | else if (Ustrcmp(argrest, "t") == 0) msg_action = MSG_THAW; |
| 2206 | else if (Ustrcmp(argrest, "vb") == 0) |
| 2207 | { |
| 2208 | msg_action = MSG_SHOW_BODY; |
| 2209 | one_msg_action = TRUE; |
| 2210 | } |
| 2211 | else if (Ustrcmp(argrest, "vh") == 0) |
| 2212 | { |
| 2213 | msg_action = MSG_SHOW_HEADER; |
| 2214 | one_msg_action = TRUE; |
| 2215 | } |
| 2216 | else if (Ustrcmp(argrest, "vl") == 0) |
| 2217 | { |
| 2218 | msg_action = MSG_SHOW_LOG; |
| 2219 | one_msg_action = TRUE; |
| 2220 | } |
| 2221 | else { badarg = TRUE; break; } |
| 2222 | |
| 2223 | /* All the -Mxx options require at least one message id. */ |
| 2224 | |
| 2225 | msg_action_arg = i + 1; |
| 2226 | if (msg_action_arg >= argc) |
| 2227 | { |
| 2228 | fprintf(stderr, "exim: no message ids given after %s option\n", arg); |
| 2229 | return EXIT_FAILURE; |
| 2230 | } |
| 2231 | |
| 2232 | /* Some require only message ids to follow */ |
| 2233 | |
| 2234 | if (!one_msg_action) |
| 2235 | { |
| 2236 | int j; |
| 2237 | for (j = msg_action_arg; j < argc; j++) if (!mac_ismsgid(argv[j])) |
| 2238 | { |
| 2239 | fprintf(stderr, "exim: malformed message id %s after %s option\n", |
| 2240 | argv[j], arg); |
| 2241 | return EXIT_FAILURE; |
| 2242 | } |
| 2243 | goto END_ARG; /* Remaining args are ids */ |
| 2244 | } |
| 2245 | |
| 2246 | /* Others require only one message id, possibly followed by addresses, |
| 2247 | which will be handled as normal arguments. */ |
| 2248 | |
| 2249 | else |
| 2250 | { |
| 2251 | if (!mac_ismsgid(argv[msg_action_arg])) |
| 2252 | { |
| 2253 | fprintf(stderr, "exim: malformed message id %s after %s option\n", |
| 2254 | argv[msg_action_arg], arg); |
| 2255 | return EXIT_FAILURE; |
| 2256 | } |
| 2257 | i++; |
| 2258 | } |
| 2259 | break; |
| 2260 | |
| 2261 | |
| 2262 | /* Some programs seem to call the -om option without the leading o; |
| 2263 | for sendmail it askes for "me too". Exim always does this. */ |
| 2264 | |
| 2265 | case 'm': |
| 2266 | if (*argrest != 0) badarg = TRUE; |
| 2267 | break; |
| 2268 | |
| 2269 | |
| 2270 | /* -N: don't do delivery - a debugging option that stops transports doing |
| 2271 | their thing. It implies debugging at the D_v level. */ |
| 2272 | |
| 2273 | case 'N': |
| 2274 | if (*argrest == 0) |
| 2275 | { |
| 2276 | dont_deliver = TRUE; |
| 2277 | debug_selector |= D_v; |
| 2278 | debug_file = stderr; |
| 2279 | } |
| 2280 | else badarg = TRUE; |
| 2281 | break; |
| 2282 | |
| 2283 | |
| 2284 | /* -n: This means "don't alias" in sendmail, apparently. Just ignore |
| 2285 | it. */ |
| 2286 | |
| 2287 | case 'n': |
| 2288 | break; |
| 2289 | |
| 2290 | /* -O: Just ignore it. In sendmail, apparently -O option=value means set |
| 2291 | option to the specified value. This form uses long names. We need to handle |
| 2292 | -O option=value and -Ooption=value. */ |
| 2293 | |
| 2294 | case 'O': |
| 2295 | if (*argrest == 0) |
| 2296 | { |
| 2297 | if (++i >= argc) |
| 2298 | { |
| 2299 | fprintf(stderr, "exim: string expected after -O\n"); |
| 2300 | exit(EXIT_FAILURE); |
| 2301 | } |
| 2302 | } |
| 2303 | break; |
| 2304 | |
| 2305 | case 'o': |
| 2306 | |
| 2307 | /* -oA: Set an argument for the bi command (sendmail's "alternate alias |
| 2308 | file" option). */ |
| 2309 | |
| 2310 | if (*argrest == 'A') |
| 2311 | { |
| 2312 | alias_arg = argrest + 1; |
| 2313 | if (alias_arg[0] == 0) |
| 2314 | { |
| 2315 | if (i+1 < argc) alias_arg = argv[++i]; else |
| 2316 | { |
| 2317 | fprintf(stderr, "exim: string expected after -oA\n"); |
| 2318 | exit(EXIT_FAILURE); |
| 2319 | } |
| 2320 | } |
| 2321 | } |
| 2322 | |
| 2323 | /* -oB: Set a connection message max value for remote deliveries */ |
| 2324 | |
| 2325 | else if (*argrest == 'B') |
| 2326 | { |
| 2327 | uschar *p = argrest + 1; |
| 2328 | if (p[0] == 0) |
| 2329 | { |
| 2330 | if (i+1 < argc && isdigit((argv[i+1][0]))) p = argv[++i]; else |
| 2331 | { |
| 2332 | connection_max_messages = 1; |
| 2333 | p = NULL; |
| 2334 | } |
| 2335 | } |
| 2336 | |
| 2337 | if (p != NULL) |
| 2338 | { |
| 2339 | if (!isdigit(*p)) |
| 2340 | { |
| 2341 | fprintf(stderr, "exim: number expected after -oB\n"); |
| 2342 | exit(EXIT_FAILURE); |
| 2343 | } |
| 2344 | connection_max_messages = Uatoi(p); |
| 2345 | } |
| 2346 | } |
| 2347 | |
| 2348 | /* -odb: background delivery */ |
| 2349 | |
| 2350 | else if (Ustrcmp(argrest, "db") == 0) |
| 2351 | { |
| 2352 | synchronous_delivery = FALSE; |
| 2353 | arg_queue_only = FALSE; |
| 2354 | queue_only_set = TRUE; |
| 2355 | } |
| 2356 | |
| 2357 | /* -odf: foreground delivery (smail-compatible option); same effect as |
| 2358 | -odi: interactive (synchronous) delivery (sendmail-compatible option) |
| 2359 | */ |
| 2360 | |
| 2361 | else if (Ustrcmp(argrest, "df") == 0 || Ustrcmp(argrest, "di") == 0) |
| 2362 | { |
| 2363 | synchronous_delivery = TRUE; |
| 2364 | arg_queue_only = FALSE; |
| 2365 | queue_only_set = TRUE; |
| 2366 | } |
| 2367 | |
| 2368 | /* -odq: queue only */ |
| 2369 | |
| 2370 | else if (Ustrcmp(argrest, "dq") == 0) |
| 2371 | { |
| 2372 | synchronous_delivery = FALSE; |
| 2373 | arg_queue_only = TRUE; |
| 2374 | queue_only_set = TRUE; |
| 2375 | } |
| 2376 | |
| 2377 | /* -odqs: queue SMTP only - do local deliveries and remote routing, |
| 2378 | but no remote delivery */ |
| 2379 | |
| 2380 | else if (Ustrcmp(argrest, "dqs") == 0) |
| 2381 | { |
| 2382 | queue_smtp = TRUE; |
| 2383 | arg_queue_only = FALSE; |
| 2384 | queue_only_set = TRUE; |
| 2385 | } |
| 2386 | |
| 2387 | /* -oex: Sendmail error flags. As these are also accepted without the |
| 2388 | leading -o prefix, for compatibility with vacation and other callers, |
| 2389 | they are handled with -e above. */ |
| 2390 | |
| 2391 | /* -oi: Set flag so dot doesn't end non-SMTP input (same as -i) |
| 2392 | -oitrue: Another sendmail syntax for the same */ |
| 2393 | |
| 2394 | else if (Ustrcmp(argrest, "i") == 0 || |
| 2395 | Ustrcmp(argrest, "itrue") == 0) |
| 2396 | dot_ends = FALSE; |
| 2397 | |
| 2398 | /* -oM*: Set various characteristics for an incoming message; actually |
| 2399 | acted on for trusted callers only. */ |
| 2400 | |
| 2401 | else if (*argrest == 'M') |
| 2402 | { |
| 2403 | if (i+1 >= argc) |
| 2404 | { |
| 2405 | fprintf(stderr, "exim: data expected after -o%s\n", argrest); |
| 2406 | exit(EXIT_FAILURE); |
| 2407 | } |
| 2408 | |
| 2409 | /* -oMa: Set sender host address */ |
| 2410 | |
| 2411 | if (Ustrcmp(argrest, "Ma") == 0) sender_host_address = argv[++i]; |
| 2412 | |
| 2413 | /* -oMaa: Set authenticator name */ |
| 2414 | |
| 2415 | else if (Ustrcmp(argrest, "Maa") == 0) |
| 2416 | sender_host_authenticated = argv[++i]; |
| 2417 | |
| 2418 | /* -oMas: setting authenticated sender */ |
| 2419 | |
| 2420 | else if (Ustrcmp(argrest, "Mas") == 0) authenticated_sender = argv[++i]; |
| 2421 | |
| 2422 | /* -oMai: setting authenticated id */ |
| 2423 | |
| 2424 | else if (Ustrcmp(argrest, "Mai") == 0) authenticated_id = argv[++i]; |
| 2425 | |
| 2426 | /* -oMi: Set incoming interface address */ |
| 2427 | |
| 2428 | else if (Ustrcmp(argrest, "Mi") == 0) interface_address = argv[++i]; |
| 2429 | |
| 2430 | /* -oMr: Received protocol */ |
| 2431 | |
| 2432 | else if (Ustrcmp(argrest, "Mr") == 0) received_protocol = argv[++i]; |
| 2433 | |
| 2434 | /* -oMs: Set sender host name */ |
| 2435 | |
| 2436 | else if (Ustrcmp(argrest, "Ms") == 0) sender_host_name = argv[++i]; |
| 2437 | |
| 2438 | /* -oMt: Set sender ident */ |
| 2439 | |
| 2440 | else if (Ustrcmp(argrest, "Mt") == 0) sender_ident = argv[++i]; |
| 2441 | |
| 2442 | /* Else a bad argument */ |
| 2443 | |
| 2444 | else |
| 2445 | { |
| 2446 | badarg = TRUE; |
| 2447 | break; |
| 2448 | } |
| 2449 | } |
| 2450 | |
| 2451 | /* -om: Me-too flag for aliases. Exim always does this. Some programs |
| 2452 | seem to call this as -m (undocumented), so that is also accepted (see |
| 2453 | above). */ |
| 2454 | |
| 2455 | else if (Ustrcmp(argrest, "m") == 0) {} |
| 2456 | |
| 2457 | /* -oo: An ancient flag for old-style addresses which still seems to |
| 2458 | crop up in some calls (see in SCO). */ |
| 2459 | |
| 2460 | else if (Ustrcmp(argrest, "o") == 0) {} |
| 2461 | |
| 2462 | /* -oP <name>: set pid file path for daemon */ |
| 2463 | |
| 2464 | else if (Ustrcmp(argrest, "P") == 0) |
| 2465 | override_pid_file_path = argv[++i]; |
| 2466 | |
| 2467 | /* -or <n>: set timeout for non-SMTP acceptance |
| 2468 | -os <n>: set timeout for SMTP acceptance */ |
| 2469 | |
| 2470 | else if (*argrest == 'r' || *argrest == 's') |
| 2471 | { |
| 2472 | int *tp = (*argrest == 'r')? |
| 2473 | &arg_receive_timeout : &arg_smtp_receive_timeout; |
| 2474 | if (argrest[1] == 0) |
| 2475 | { |
| 2476 | if (i+1 < argc) *tp= readconf_readtime(argv[++i], 0, FALSE); |
| 2477 | } |
| 2478 | else *tp = readconf_readtime(argrest + 1, 0, FALSE); |
| 2479 | if (*tp < 0) |
| 2480 | { |
| 2481 | fprintf(stderr, "exim: bad time value %s: abandoned\n", argv[i]); |
| 2482 | exit(EXIT_FAILURE); |
| 2483 | } |
| 2484 | } |
| 2485 | |
| 2486 | /* -oX <list>: Override local_interfaces and/or default daemon ports */ |
| 2487 | |
| 2488 | else if (Ustrcmp(argrest, "X") == 0) |
| 2489 | override_local_interfaces = argv[++i]; |
| 2490 | |
| 2491 | /* Unknown -o argument */ |
| 2492 | |
| 2493 | else badarg = TRUE; |
| 2494 | break; |
| 2495 | |
| 2496 | |
| 2497 | /* -ps: force Perl startup; -pd force delayed Perl startup */ |
| 2498 | |
| 2499 | case 'p': |
| 2500 | #ifdef EXIM_PERL |
| 2501 | if (*argrest == 's' && argrest[1] == 0) |
| 2502 | { |
| 2503 | perl_start_option = 1; |
| 2504 | break; |
| 2505 | } |
| 2506 | if (*argrest == 'd' && argrest[1] == 0) |
| 2507 | { |
| 2508 | perl_start_option = -1; |
| 2509 | break; |
| 2510 | } |
| 2511 | #endif |
| 2512 | |
| 2513 | /* -panythingelse is taken as the Sendmail-compatible argument -prval:sval, |
| 2514 | which sets the host protocol and host name */ |
| 2515 | |
| 2516 | if (*argrest == 0) |
| 2517 | { |
| 2518 | if (i+1 < argc) argrest = argv[++i]; else |
| 2519 | { badarg = TRUE; break; } |
| 2520 | } |
| 2521 | |
| 2522 | if (*argrest != 0) |
| 2523 | { |
| 2524 | uschar *hn = Ustrchr(argrest, ':'); |
| 2525 | if (hn == NULL) |
| 2526 | { |
| 2527 | received_protocol = argrest; |
| 2528 | } |
| 2529 | else |
| 2530 | { |
| 2531 | received_protocol = string_copyn(argrest, hn - argrest); |
| 2532 | sender_host_name = hn + 1; |
| 2533 | } |
| 2534 | } |
| 2535 | break; |
| 2536 | |
| 2537 | |
| 2538 | case 'q': |
| 2539 | receiving_message = FALSE; |
| 2540 | |
| 2541 | /* -qq...: Do queue runs in a 2-stage manner */ |
| 2542 | |
| 2543 | if (*argrest == 'q') |
| 2544 | { |
| 2545 | queue_2stage = TRUE; |
| 2546 | argrest++; |
| 2547 | } |
| 2548 | |
| 2549 | /* -qi...: Do only first (initial) deliveries */ |
| 2550 | |
| 2551 | if (*argrest == 'i') |
| 2552 | { |
| 2553 | queue_run_first_delivery = TRUE; |
| 2554 | argrest++; |
| 2555 | } |
| 2556 | |
| 2557 | /* -qf...: Run the queue, forcing deliveries |
| 2558 | -qff..: Ditto, forcing thawing as well */ |
| 2559 | |
| 2560 | if (*argrest == 'f') |
| 2561 | { |
| 2562 | queue_run_force = TRUE; |
| 2563 | if (*(++argrest) == 'f') |
| 2564 | { |
| 2565 | deliver_force_thaw = TRUE; |
| 2566 | argrest++; |
| 2567 | } |
| 2568 | } |
| 2569 | |
| 2570 | /* -q[f][f]l...: Run the queue only on local deliveries */ |
| 2571 | |
| 2572 | if (*argrest == 'l') |
| 2573 | { |
| 2574 | queue_run_local = TRUE; |
| 2575 | argrest++; |
| 2576 | } |
| 2577 | |
| 2578 | /* -q[f][f][l]: Run the queue, optionally forced, optionally local only, |
| 2579 | optionally starting from a given message id. */ |
| 2580 | |
| 2581 | if (*argrest == 0 && |
| 2582 | (i + 1 >= argc || argv[i+1][0] == '-' || mac_ismsgid(argv[i+1]))) |
| 2583 | { |
| 2584 | queue_interval = 0; |
| 2585 | if (i+1 < argc && mac_ismsgid(argv[i+1])) |
| 2586 | start_queue_run_id = argv[++i]; |
| 2587 | if (i+1 < argc && mac_ismsgid(argv[i+1])) |
| 2588 | stop_queue_run_id = argv[++i]; |
| 2589 | } |
| 2590 | |
| 2591 | /* -q[f][f][l]<n>: Run the queue at regular intervals, optionally forced, |
| 2592 | optionally local only. */ |
| 2593 | |
| 2594 | else |
| 2595 | { |
| 2596 | if (*argrest != 0) |
| 2597 | queue_interval = readconf_readtime(argrest, 0, FALSE); |
| 2598 | else |
| 2599 | queue_interval = readconf_readtime(argv[++i], 0, FALSE); |
| 2600 | if (queue_interval <= 0) |
| 2601 | { |
| 2602 | fprintf(stderr, "exim: bad time value %s: abandoned\n", argv[i]); |
| 2603 | exit(EXIT_FAILURE); |
| 2604 | } |
| 2605 | } |
| 2606 | break; |
| 2607 | |
| 2608 | |
| 2609 | case 'R': /* Synonymous with -qR... */ |
| 2610 | receiving_message = FALSE; |
| 2611 | |
| 2612 | /* -Rf: As -R (below) but force all deliveries, |
| 2613 | -Rff: Ditto, but also thaw all frozen messages, |
| 2614 | -Rr: String is regex |
| 2615 | -Rrf: Regex and force |
| 2616 | -Rrff: Regex and force and thaw |
| 2617 | |
| 2618 | in all cases provided there are no further characters in this |
| 2619 | argument. */ |
| 2620 | |
| 2621 | if (*argrest != 0) |
| 2622 | { |
| 2623 | int i; |
| 2624 | for (i = 0; i < sizeof(rsopts)/sizeof(uschar *); i++) |
| 2625 | { |
| 2626 | if (Ustrcmp(argrest, rsopts[i]) == 0) |
| 2627 | { |
| 2628 | if (i != 2) queue_run_force = TRUE; |
| 2629 | if (i >= 2) deliver_selectstring_regex = TRUE; |
| 2630 | if (i == 1 || i == 4) deliver_force_thaw = TRUE; |
| 2631 | argrest += Ustrlen(rsopts[i]); |
| 2632 | } |
| 2633 | } |
| 2634 | } |
| 2635 | |
| 2636 | /* -R: Set string to match in addresses for forced queue run to |
| 2637 | pick out particular messages. */ |
| 2638 | |
| 2639 | if (*argrest == 0) |
| 2640 | { |
| 2641 | if (i+1 < argc) deliver_selectstring = argv[++i]; else |
| 2642 | { |
| 2643 | fprintf(stderr, "exim: string expected after -R\n"); |
| 2644 | exit(EXIT_FAILURE); |
| 2645 | } |
| 2646 | } |
| 2647 | else deliver_selectstring = argrest; |
| 2648 | if (queue_interval < 0) queue_interval = 0; |
| 2649 | break; |
| 2650 | |
| 2651 | |
| 2652 | /* -r: an obsolete synonym for -f (see above) */ |
| 2653 | |
| 2654 | |
| 2655 | /* -S: Like -R but works on sender. */ |
| 2656 | |
| 2657 | case 'S': /* Synonymous with -qS... */ |
| 2658 | receiving_message = FALSE; |
| 2659 | |
| 2660 | /* -Sf: As -S (below) but force all deliveries, |
| 2661 | -Sff: Ditto, but also thaw all frozen messages, |
| 2662 | -Sr: String is regex |
| 2663 | -Srf: Regex and force |
| 2664 | -Srff: Regex and force and thaw |
| 2665 | |
| 2666 | in all cases provided there are no further characters in this |
| 2667 | argument. */ |
| 2668 | |
| 2669 | if (*argrest != 0) |
| 2670 | { |
| 2671 | int i; |
| 2672 | for (i = 0; i < sizeof(rsopts)/sizeof(uschar *); i++) |
| 2673 | { |
| 2674 | if (Ustrcmp(argrest, rsopts[i]) == 0) |
| 2675 | { |
| 2676 | if (i != 2) queue_run_force = TRUE; |
| 2677 | if (i >= 2) deliver_selectstring_sender_regex = TRUE; |
| 2678 | if (i == 1 || i == 4) deliver_force_thaw = TRUE; |
| 2679 | argrest += Ustrlen(rsopts[i]); |
| 2680 | } |
| 2681 | } |
| 2682 | } |
| 2683 | |
| 2684 | /* -S: Set string to match in addresses for forced queue run to |
| 2685 | pick out particular messages. */ |
| 2686 | |
| 2687 | if (*argrest == 0) |
| 2688 | { |
| 2689 | if (i+1 < argc) deliver_selectstring_sender = argv[++i]; else |
| 2690 | { |
| 2691 | fprintf(stderr, "exim: string expected after -S\n"); |
| 2692 | exit(EXIT_FAILURE); |
| 2693 | } |
| 2694 | } |
| 2695 | else deliver_selectstring_sender = argrest; |
| 2696 | if (queue_interval < 0) queue_interval = 0; |
| 2697 | break; |
| 2698 | |
| 2699 | /* -Tqt is an option that is exclusively for use by the testing suite. |
| 2700 | It is not recognized in other circumstances. It allows for the setting up |
| 2701 | of explicit "queue times" so that various warning/retry things can be |
| 2702 | tested. Otherwise variability of clock ticks etc. cause problems. */ |
| 2703 | |
| 2704 | case 'T': |
| 2705 | if (running_in_test_harness && Ustrcmp(argrest, "qt") == 0) |
| 2706 | fudged_queue_times = argv[++i]; |
| 2707 | else badarg = TRUE; |
| 2708 | break; |
| 2709 | |
| 2710 | |
| 2711 | /* -t: Set flag to extract recipients from body of message. */ |
| 2712 | |
| 2713 | case 't': |
| 2714 | if (*argrest == 0) extract_recipients = TRUE; |
| 2715 | |
| 2716 | /* -ti: Set flag to extract recipients from body of message, and also |
| 2717 | specify that dot does not end the message. */ |
| 2718 | |
| 2719 | else if (Ustrcmp(argrest, "i") == 0) |
| 2720 | { |
| 2721 | extract_recipients = TRUE; |
| 2722 | dot_ends = FALSE; |
| 2723 | } |
| 2724 | |
| 2725 | /* -tls-on-connect: don't wait for STARTTLS (for old clients) */ |
| 2726 | |
| 2727 | #ifdef SUPPORT_TLS |
| 2728 | else if (Ustrcmp(argrest, "ls-on-connect") == 0) tls_on_connect = TRUE; |
| 2729 | #endif |
| 2730 | |
| 2731 | else badarg = TRUE; |
| 2732 | break; |
| 2733 | |
| 2734 | |
| 2735 | /* -U: This means "initial user submission" in sendmail, apparently. The |
| 2736 | doc claims that in future sendmail may refuse syntactically invalid |
| 2737 | messages instead of fixing them. For the moment, we just ignore it. */ |
| 2738 | |
| 2739 | case 'U': |
| 2740 | break; |
| 2741 | |
| 2742 | |
| 2743 | /* -v: verify things - this is a very low-level debugging */ |
| 2744 | |
| 2745 | case 'v': |
| 2746 | if (*argrest == 0) |
| 2747 | { |
| 2748 | debug_selector |= D_v; |
| 2749 | debug_file = stderr; |
| 2750 | } |
| 2751 | else badarg = TRUE; |
| 2752 | break; |
| 2753 | |
| 2754 | |
| 2755 | /* -x: AIX uses this to indicate some fancy 8-bit character stuff: |
| 2756 | |
| 2757 | The -x flag tells the sendmail command that mail from a local |
| 2758 | mail program has National Language Support (NLS) extended characters |
| 2759 | in the body of the mail item. The sendmail command can send mail with |
| 2760 | extended NLS characters across networks that normally corrupts these |
| 2761 | 8-bit characters. |
| 2762 | |
| 2763 | As Exim is 8-bit clean, it just ignores this flag. */ |
| 2764 | |
| 2765 | case 'x': |
| 2766 | if (*argrest != 0) badarg = TRUE; |
| 2767 | break; |
| 2768 | |
| 2769 | /* All other initial characters are errors */ |
| 2770 | |
| 2771 | default: |
| 2772 | badarg = TRUE; |
| 2773 | break; |
| 2774 | } /* End of high-level switch statement */ |
| 2775 | |
| 2776 | /* Failed to recognize the option, or syntax error */ |
| 2777 | |
| 2778 | if (badarg) |
| 2779 | { |
| 2780 | fprintf(stderr, "exim abandoned: unknown, malformed, or incomplete " |
| 2781 | "option %s\n", arg); |
| 2782 | exit(EXIT_FAILURE); |
| 2783 | } |
| 2784 | } |
| 2785 | |
| 2786 | |
| 2787 | /* Arguments have been processed. Check for incompatibilities. */ |
| 2788 | |
| 2789 | END_ARG: |
| 2790 | if (( |
| 2791 | (smtp_input || extract_recipients || recipients_arg < argc) && |
| 2792 | (daemon_listen || queue_interval >= 0 || bi_option || |
| 2793 | test_retry_arg >= 0 || test_rewrite_arg >= 0 || |
| 2794 | filter_test != FTEST_NONE || (msg_action_arg > 0 && !one_msg_action)) |
| 2795 | ) || |
| 2796 | ( |
| 2797 | msg_action_arg > 0 && |
| 2798 | (daemon_listen || queue_interval >= 0 || list_options || checking || |
| 2799 | bi_option || test_retry_arg >= 0 || test_rewrite_arg >= 0) |
| 2800 | ) || |
| 2801 | ( |
| 2802 | (daemon_listen || queue_interval >= 0) && |
| 2803 | (sender_address != NULL || list_options || list_queue || checking || |
| 2804 | bi_option) |
| 2805 | ) || |
| 2806 | ( |
| 2807 | daemon_listen && queue_interval == 0 |
| 2808 | ) || |
| 2809 | ( |
| 2810 | list_options && |
| 2811 | (checking || smtp_input || extract_recipients || |
| 2812 | filter_test != FTEST_NONE || bi_option) |
| 2813 | ) || |
| 2814 | ( |
| 2815 | verify_address_mode && |
| 2816 | (address_test_mode || smtp_input || extract_recipients || |
| 2817 | filter_test != FTEST_NONE || bi_option) |
| 2818 | ) || |
| 2819 | ( |
| 2820 | address_test_mode && (smtp_input || extract_recipients || |
| 2821 | filter_test != FTEST_NONE || bi_option) |
| 2822 | ) || |
| 2823 | ( |
| 2824 | smtp_input && (sender_address != NULL || filter_test != FTEST_NONE || |
| 2825 | extract_recipients) |
| 2826 | ) || |
| 2827 | ( |
| 2828 | deliver_selectstring != NULL && queue_interval < 0 |
| 2829 | ) |
| 2830 | ) |
| 2831 | { |
| 2832 | fprintf(stderr, "exim: incompatible command-line options or arguments\n"); |
| 2833 | exit(EXIT_FAILURE); |
| 2834 | } |
| 2835 | |
| 2836 | /* If debugging is set up, set the file and the file descriptor to pass on to |
| 2837 | child processes. It should, of course, be 2 for stderr. Also, force the daemon |
| 2838 | to run in the foreground. */ |
| 2839 | |
| 2840 | if (debug_selector != 0) |
| 2841 | { |
| 2842 | debug_file = stderr; |
| 2843 | debug_fd = fileno(debug_file); |
| 2844 | background_daemon = FALSE; |
| 2845 | if (running_in_test_harness) millisleep(100); /* lets caller finish */ |
| 2846 | if (debug_selector != D_v) /* -v only doesn't show this */ |
| 2847 | { |
| 2848 | debug_printf("Exim version %s uid=%ld gid=%ld pid=%d D=%x\n", |
| 2849 | version_string, (long int)real_uid, (long int)real_gid, (int)getpid(), |
| 2850 | debug_selector); |
| 2851 | show_whats_supported(stderr); |
| 2852 | } |
| 2853 | } |
| 2854 | |
| 2855 | /* When started with root privilege, ensure that the limits on the number of |
| 2856 | open files and the number of processes (where that is accessible) are |
| 2857 | sufficiently large, or are unset, in case Exim has been called from an |
| 2858 | environment where the limits are screwed down. Not all OS have the ability to |
| 2859 | change some of these limits. */ |
| 2860 | |
| 2861 | if (unprivileged) |
| 2862 | { |
| 2863 | DEBUG(D_any) debug_print_ids(US"Exim has no root privilege:"); |
| 2864 | } |
| 2865 | else |
| 2866 | { |
| 2867 | struct rlimit rlp; |
| 2868 | |
| 2869 | #ifdef RLIMIT_NOFILE |
| 2870 | if (getrlimit(RLIMIT_NOFILE, &rlp) < 0) |
| 2871 | { |
| 2872 | log_write(0, LOG_MAIN|LOG_PANIC, "getrlimit(RLIMIT_NOFILE) failed: %s", |
| 2873 | strerror(errno)); |
| 2874 | rlp.rlim_cur = rlp.rlim_max = 0; |
| 2875 | } |
| 2876 | |
| 2877 | /* I originally chose 1000 as a nice big number that was unlikely to |
| 2878 | be exceeded. It turns out that some older OS have a fixed upper limit of |
| 2879 | 256. */ |
| 2880 | |
| 2881 | if (rlp.rlim_cur < 1000) |
| 2882 | { |
| 2883 | rlp.rlim_cur = rlp.rlim_max = 1000; |
| 2884 | if (setrlimit(RLIMIT_NOFILE, &rlp) < 0) |
| 2885 | { |
| 2886 | rlp.rlim_cur = rlp.rlim_max = 256; |
| 2887 | if (setrlimit(RLIMIT_NOFILE, &rlp) < 0) |
| 2888 | log_write(0, LOG_MAIN|LOG_PANIC, "setrlimit(RLIMIT_NOFILE) failed: %s", |
| 2889 | strerror(errno)); |
| 2890 | } |
| 2891 | } |
| 2892 | #endif |
| 2893 | |
| 2894 | #ifdef RLIMIT_NPROC |
| 2895 | if (getrlimit(RLIMIT_NPROC, &rlp) < 0) |
| 2896 | { |
| 2897 | log_write(0, LOG_MAIN|LOG_PANIC, "getrlimit(RLIMIT_NPROC) failed: %s", |
| 2898 | strerror(errno)); |
| 2899 | rlp.rlim_cur = rlp.rlim_max = 0; |
| 2900 | } |
| 2901 | |
| 2902 | #ifdef RLIM_INFINITY |
| 2903 | if (rlp.rlim_cur != RLIM_INFINITY && rlp.rlim_cur < 1000) |
| 2904 | { |
| 2905 | rlp.rlim_cur = rlp.rlim_max = RLIM_INFINITY; |
| 2906 | #else |
| 2907 | if (rlp.rlim_cur < 1000) |
| 2908 | { |
| 2909 | rlp.rlim_cur = rlp.rlim_max = 1000; |
| 2910 | #endif |
| 2911 | if (setrlimit(RLIMIT_NPROC, &rlp) < 0) |
| 2912 | log_write(0, LOG_MAIN|LOG_PANIC, "setrlimit(RLIMIT_NPROC) failed: %s", |
| 2913 | strerror(errno)); |
| 2914 | } |
| 2915 | #endif |
| 2916 | } |
| 2917 | |
| 2918 | /* Exim is normally entered as root (but some special configurations are |
| 2919 | possible that don't do this). However, it always spins off sub-processes that |
| 2920 | set their uid and gid as required for local delivery. We don't want to pass on |
| 2921 | any extra groups that root may belong to, so we want to get rid of them all at |
| 2922 | this point. |
| 2923 | |
| 2924 | We need to obey setgroups() at this stage, before possibly giving up root |
| 2925 | privilege for a changed configuration file, but later on we might need to |
| 2926 | check on the additional groups for the admin user privilege - can't do that |
| 2927 | till after reading the config, which might specify the exim gid. Therefore, |
| 2928 | save the group list here first. */ |
| 2929 | |
| 2930 | group_count = getgroups(NGROUPS_MAX, group_list); |
| 2931 | |
| 2932 | /* There is a fundamental difference in some BSD systems in the matter of |
| 2933 | groups. FreeBSD and BSDI are known to be different; NetBSD and OpenBSD are |
| 2934 | known not to be different. On the "different" systems there is a single group |
| 2935 | list, and the first entry in it is the current group. On all other versions of |
| 2936 | Unix there is a supplementary group list, which is in *addition* to the current |
| 2937 | group. Consequently, to get rid of all extraneous groups on a "standard" system |
| 2938 | you pass over 0 groups to setgroups(), while on a "different" system you pass |
| 2939 | over a single group - the current group, which is always the first group in the |
| 2940 | list. Calling setgroups() with zero groups on a "different" system results in |
| 2941 | an error return. The following code should cope with both types of system. |
| 2942 | |
| 2943 | However, if this process isn't running as root, setgroups() can't be used |
| 2944 | since you have to be root to run it, even if throwing away groups. Not being |
| 2945 | root here happens only in some unusual configurations. We just ignore the |
| 2946 | error. */ |
| 2947 | |
| 2948 | if (setgroups(0, NULL) != 0) |
| 2949 | { |
| 2950 | if (setgroups(1, group_list) != 0 && !unprivileged) |
| 2951 | { |
| 2952 | fprintf(stderr, "exim: setgroups() failed: %s\n", strerror(errno)); |
| 2953 | exit(EXIT_FAILURE); |
| 2954 | } |
| 2955 | } |
| 2956 | |
| 2957 | /* If the configuration file name has been altered by an argument on the |
| 2958 | command line (either a new file name or a macro definition) and the caller is |
| 2959 | not root or the exim user, or if this is a filter testing run, remove any |
| 2960 | setuid privilege the program has, and run as the underlying user. |
| 2961 | |
| 2962 | If ALT_CONFIG_ROOT_ONLY is defined, the exim user is locked out of this, which |
| 2963 | severely restricts the use of -C for some purposes. |
| 2964 | |
| 2965 | Otherwise, set the real ids to the effective values (should be root unless run |
| 2966 | from inetd, which it can either be root or the exim uid, if one is configured). |
| 2967 | |
| 2968 | There is a private mechanism for bypassing some of this, in order to make it |
| 2969 | possible to test lots of configurations automatically, without having either to |
| 2970 | recompile each time, or to patch in an actual configuration file name and other |
| 2971 | values (such as the path name). If running in the test harness, pretend that |
| 2972 | configuration file changes and macro definitions haven't happened. */ |
| 2973 | |
| 2974 | if (( /* EITHER */ |
| 2975 | (config_changed || macros != NULL) && /* Config changed, and */ |
| 2976 | real_uid != root_uid && /* Not root, and */ |
| 2977 | #ifndef ALT_CONFIG_ROOT_ONLY /* (when not locked out) */ |
| 2978 | real_uid != exim_uid && /* Not exim, and */ |
| 2979 | #endif |
| 2980 | !running_in_test_harness /* Not fudged */ |
| 2981 | ) || /* OR */ |
| 2982 | expansion_test /* expansion testing */ |
| 2983 | || /* OR */ |
| 2984 | filter_test != FTEST_NONE) /* Filter testing */ |
| 2985 | { |
| 2986 | setgroups(group_count, group_list); |
| 2987 | exim_setugid(real_uid, real_gid, FALSE, |
| 2988 | US"-C, -D, -be or -bf forces real uid"); |
| 2989 | removed_privilege = TRUE; |
| 2990 | |
| 2991 | /* In the normal case when Exim is called like this, stderr is available |
| 2992 | and should be used for any logging information because attempts to write |
| 2993 | to the log will usually fail. To arrange this, we unset really_exim. However, |
| 2994 | if no stderr is available there is no point - we might as well have a go |
| 2995 | at the log (if it fails, syslog will be written). */ |
| 2996 | |
| 2997 | if (log_stderr != NULL) really_exim = FALSE; |
| 2998 | } |
| 2999 | |
| 3000 | /* Privilege is to be retained for the moment. It may be dropped later, |
| 3001 | depending on the job that this Exim process has been asked to do. For now, set |
| 3002 | the real uid to the effective so that subsequent re-execs of Exim are done by a |
| 3003 | privileged user. */ |
| 3004 | |
| 3005 | else exim_setugid(geteuid(), getegid(), FALSE, US"forcing real = effective"); |
| 3006 | |
| 3007 | /* If testing a filter, open the file(s) now, before wasting time doing other |
| 3008 | setups and reading the message. */ |
| 3009 | |
| 3010 | if ((filter_test & FTEST_SYSTEM) != 0) |
| 3011 | { |
| 3012 | filter_sfd = Uopen(filter_test_sfile, O_RDONLY, 0); |
| 3013 | if (filter_sfd < 0) |
| 3014 | { |
| 3015 | fprintf(stderr, "exim: failed to open %s: %s\n", filter_test_sfile, |
| 3016 | strerror(errno)); |
| 3017 | return EXIT_FAILURE; |
| 3018 | } |
| 3019 | } |
| 3020 | |
| 3021 | if ((filter_test & FTEST_USER) != 0) |
| 3022 | { |
| 3023 | filter_ufd = Uopen(filter_test_ufile, O_RDONLY, 0); |
| 3024 | if (filter_ufd < 0) |
| 3025 | { |
| 3026 | fprintf(stderr, "exim: failed to open %s: %s\n", filter_test_ufile, |
| 3027 | strerror(errno)); |
| 3028 | return EXIT_FAILURE; |
| 3029 | } |
| 3030 | } |
| 3031 | |
| 3032 | /* Read the main runtime configuration data; this gives up if there |
| 3033 | is a failure. It leaves the configuration file open so that the subsequent |
| 3034 | configuration data for delivery can be read if needed. */ |
| 3035 | |
| 3036 | readconf_main(); |
| 3037 | |
| 3038 | /* Handle the decoding of logging options. */ |
| 3039 | |
| 3040 | decode_bits(&log_write_selector, &log_extra_selector, log_selector_string, |
| 3041 | log_options, log_options_count, US"log"); |
| 3042 | |
| 3043 | DEBUG(D_any) |
| 3044 | { |
| 3045 | debug_printf("configuration file is %s\n", config_main_filename); |
| 3046 | debug_printf("log selectors = %08x %08x\n", log_write_selector, |
| 3047 | log_extra_selector); |
| 3048 | } |
| 3049 | |
| 3050 | /* If domain literals are not allowed, check the sender address that was |
| 3051 | supplied with -f. Ditto for a stripped trailing dot. */ |
| 3052 | |
| 3053 | if (sender_address != NULL) |
| 3054 | { |
| 3055 | if (sender_address[sender_address_domain] == '[' && !allow_domain_literals) |
| 3056 | { |
| 3057 | fprintf(stderr, "exim: bad -f address \"%s\": domain literals not " |
| 3058 | "allowed\n", sender_address); |
| 3059 | return EXIT_FAILURE; |
| 3060 | } |
| 3061 | if (f_end_dot && !strip_trailing_dot) |
| 3062 | { |
| 3063 | fprintf(stderr, "exim: bad -f address \"%s.\": domain is malformed " |
| 3064 | "(trailing dot not allowed)\n", sender_address); |
| 3065 | return EXIT_FAILURE; |
| 3066 | } |
| 3067 | } |
| 3068 | |
| 3069 | /* Paranoia check of maximum lengths of certain strings. There is a check |
| 3070 | on the length of the log file path in log.c, which will come into effect |
| 3071 | if there are any calls to write the log earlier than this. However, if we |
| 3072 | get this far but the string is very long, it is better to stop now than to |
| 3073 | carry on and (e.g.) receive a message and then have to collapse. The call to |
| 3074 | log_write() from here will cause the ultimate panic collapse if the complete |
| 3075 | file name exceeds the buffer length. */ |
| 3076 | |
| 3077 | if (Ustrlen(log_file_path) > 200) |
| 3078 | log_write(0, LOG_MAIN|LOG_PANIC_DIE, |
| 3079 | "log_file_path is longer than 200 chars: aborting"); |
| 3080 | |
| 3081 | if (Ustrlen(pid_file_path) > 200) |
| 3082 | log_write(0, LOG_MAIN|LOG_PANIC_DIE, |
| 3083 | "pid_file_path is longer than 200 chars: aborting"); |
| 3084 | |
| 3085 | if (Ustrlen(spool_directory) > 200) |
| 3086 | log_write(0, LOG_MAIN|LOG_PANIC_DIE, |
| 3087 | "spool_directory is longer than 200 chars: aborting"); |
| 3088 | |
| 3089 | /* Length check on the process name given to syslog for its TAG field, |
| 3090 | which is only permitted to be 32 characters or less. See RFC 3164. */ |
| 3091 | |
| 3092 | if (Ustrlen(syslog_processname) > 32) |
| 3093 | log_write(0, LOG_MAIN|LOG_PANIC_DIE, |
| 3094 | "syslog_processname is longer than 32 chars: aborting"); |
| 3095 | |
| 3096 | /* In some operating systems, the environment variable TMPDIR controls where |
| 3097 | temporary files are created; Exim doesn't use these (apart from when delivering |
| 3098 | to MBX mailboxes), but called libraries such as DBM libraries may require them. |
| 3099 | If TMPDIR is found in the environment, reset it to the value defined in the |
| 3100 | TMPDIR macro, if this macro is defined. */ |
| 3101 | |
| 3102 | #ifdef TMPDIR |
| 3103 | { |
| 3104 | uschar **p; |
| 3105 | for (p = USS environ; *p != NULL; p++) |
| 3106 | { |
| 3107 | if (Ustrncmp(*p, "TMPDIR=", 7) == 0 && |
| 3108 | Ustrcmp(*p+7, TMPDIR) != 0) |
| 3109 | { |
| 3110 | uschar *newp = malloc(Ustrlen(TMPDIR) + 8); |
| 3111 | sprintf(CS newp, "TMPDIR=%s", TMPDIR); |
| 3112 | *p = newp; |
| 3113 | DEBUG(D_any) debug_printf("reset TMPDIR=%s in environment\n", TMPDIR); |
| 3114 | } |
| 3115 | } |
| 3116 | } |
| 3117 | #endif |
| 3118 | |
| 3119 | /* Timezone handling. If timezone_string is "utc", set a flag to cause all |
| 3120 | timestamps to be in UTC (gmtime() is used instead of localtime()). Otherwise, |
| 3121 | we may need to get rid of a bogus timezone setting. This can arise when Exim is |
| 3122 | called by a user who has set the TZ variable. This then affects the timestamps |
| 3123 | in log files and in Received: headers, and any created Date: header lines. The |
| 3124 | required timezone is settable in the configuration file, so nothing can be done |
| 3125 | about this earlier - but hopefully nothing will normally be logged earlier than |
| 3126 | this. We have to make a new environment if TZ is wrong, but don't bother if |
| 3127 | timestamps_utc is set, because then all times are in UTC anyway. */ |
| 3128 | |
| 3129 | if (timezone_string != NULL && strcmpic(timezone_string, US"UTC") == 0) |
| 3130 | { |
| 3131 | timestamps_utc = TRUE; |
| 3132 | } |
| 3133 | else |
| 3134 | { |
| 3135 | uschar *envtz = US getenv("TZ"); |
| 3136 | if ((envtz == NULL && timezone_string != NULL) || |
| 3137 | (envtz != NULL && |
| 3138 | (timezone_string == NULL || |
| 3139 | Ustrcmp(timezone_string, envtz) != 0))) |
| 3140 | { |
| 3141 | uschar **p = USS environ; |
| 3142 | uschar **new; |
| 3143 | uschar **newp; |
| 3144 | int count = 0; |
| 3145 | while (*p++ != NULL) count++; |
| 3146 | if (envtz == NULL) count++; |
| 3147 | newp = new = malloc(sizeof(uschar *) * (count + 1)); |
| 3148 | for (p = USS environ; *p != NULL; p++) |
| 3149 | { |
| 3150 | if (Ustrncmp(*p, "TZ=", 3) == 0) continue; |
| 3151 | *newp++ = *p; |
| 3152 | } |
| 3153 | if (timezone_string != NULL) |
| 3154 | { |
| 3155 | *newp = malloc(Ustrlen(timezone_string) + 4); |
| 3156 | sprintf(CS *newp++, "TZ=%s", timezone_string); |
| 3157 | } |
| 3158 | *newp = NULL; |
| 3159 | environ = CSS new; |
| 3160 | tzset(); |
| 3161 | DEBUG(D_any) debug_printf("Reset TZ to %s: time is %s\n", timezone_string, |
| 3162 | tod_stamp(tod_log)); |
| 3163 | } |
| 3164 | } |
| 3165 | |
| 3166 | /* Handle the case when we have removed the setuid privilege because of -C or |
| 3167 | -D. This means that the caller of Exim was not root, and, provided that |
| 3168 | ALT_CONFIG_ROOT_ONLY is not defined, was not the Exim user that is built into |
| 3169 | the binary. |
| 3170 | |
| 3171 | If ALT_CONFIG_ROOT_ONLY is not defined, there is a problem if it turns out we |
| 3172 | were running as the exim user defined in the configuration file (different to |
| 3173 | the one in the binary). The sysadmin may expect this case to retain privilege |
| 3174 | because "the binary was called by the Exim user", but it hasn't, because of the |
| 3175 | order in which it handles this stuff. There are two possibilities: |
| 3176 | |
| 3177 | (1) If deliver_drop_privilege is set, Exim is not going to re-exec in order |
| 3178 | to do message deliveries. Thus, the fact that it is running as a |
| 3179 | non-privileged user is plausible, and might be wanted in some special |
| 3180 | configurations. However, really_exim will have been set false when |
| 3181 | privilege was dropped, to stop Exim trying to write to its normal log |
| 3182 | files. Therefore, re-enable normal log processing, assuming the sysadmin |
| 3183 | has set up the log directory correctly. |
| 3184 | |
| 3185 | (2) If deliver_drop_privilege is not set, the configuration won't work as |
| 3186 | apparently intended, and so we log a panic message. In order to retain |
| 3187 | root for -C or -D, the caller must either be root or the Exim user |
| 3188 | defined in the binary (when deliver_drop_ privilege is false). |
| 3189 | |
| 3190 | If ALT_CONFIG_ROOT_ONLY is defined, we don't know whether we were called by the |
| 3191 | built-in exim user or one defined in the configuration. In either event, |
| 3192 | re-enable log processing, assuming the sysadmin knows what they are doing. */ |
| 3193 | |
| 3194 | if (removed_privilege && (config_changed || macros != NULL) && |
| 3195 | real_uid == exim_uid) |
| 3196 | { |
| 3197 | #ifdef ALT_CONFIG_ROOT_ONLY |
| 3198 | really_exim = TRUE; /* let logging work normally */ |
| 3199 | #else |
| 3200 | |
| 3201 | if (deliver_drop_privilege) |
| 3202 | really_exim = TRUE; /* let logging work normally */ |
| 3203 | else |
| 3204 | log_write(0, LOG_MAIN|LOG_PANIC, |
| 3205 | "exim user (uid=%d) is defined only at runtime; privilege lost for %s", |
| 3206 | (int)exim_uid, config_changed? "-C" : "-D"); |
| 3207 | #endif |
| 3208 | } |
| 3209 | |
| 3210 | /* Start up Perl interpreter if Perl support is configured and there is a |
| 3211 | perl_startup option, and the configuration or the command line specifies |
| 3212 | initializing starting. Note that the global variables are actually called |
| 3213 | opt_perl_xxx to avoid clashing with perl's namespace (perl_*). */ |
| 3214 | |
| 3215 | #ifdef EXIM_PERL |
| 3216 | if (perl_start_option != 0) |
| 3217 | opt_perl_at_start = (perl_start_option > 0); |
| 3218 | if (opt_perl_at_start && opt_perl_startup != NULL) |
| 3219 | { |
| 3220 | uschar *errstr; |
| 3221 | DEBUG(D_any) debug_printf("Starting Perl interpreter\n"); |
| 3222 | errstr = init_perl(opt_perl_startup); |
| 3223 | if (errstr != NULL) |
| 3224 | { |
| 3225 | fprintf(stderr, "exim: error in perl_startup code: %s\n", errstr); |
| 3226 | return EXIT_FAILURE; |
| 3227 | } |
| 3228 | opt_perl_started = TRUE; |
| 3229 | } |
| 3230 | #endif /* EXIM_PERL */ |
| 3231 | |
| 3232 | /* Log the arguments of the call if the configuration file said so. This is |
| 3233 | a debugging feature for finding out what arguments certain MUAs actually use. |
| 3234 | Don't attempt it if logging is disabled, or if listing variables or if |
| 3235 | verifying/testing addresses or expansions. */ |
| 3236 | |
| 3237 | if ((log_extra_selector & LX_arguments) != 0 && really_exim |
| 3238 | && !list_options && !checking) |
| 3239 | { |
| 3240 | int i; |
| 3241 | uschar *p = big_buffer; |
| 3242 | Ustrcpy(p, "cwd="); |
| 3243 | (void)getcwd(CS p+4, big_buffer_size - 4); |
| 3244 | while (*p) p++; |
| 3245 | (void)string_format(p, big_buffer_size - (p - big_buffer), " %d args:", argc); |
| 3246 | while (*p) p++; |
| 3247 | for (i = 0; i < argc; i++) |
| 3248 | { |
| 3249 | int len = Ustrlen(argv[i]); |
| 3250 | uschar *printing; |
| 3251 | uschar *quote; |
| 3252 | if (p + len + 8 >= big_buffer + big_buffer_size) |
| 3253 | { |
| 3254 | Ustrcpy(p, " ..."); |
| 3255 | log_write(0, LOG_MAIN, "%s", big_buffer); |
| 3256 | Ustrcpy(big_buffer, "..."); |
| 3257 | p = big_buffer + 3; |
| 3258 | } |
| 3259 | printing = string_printing(argv[i]); |
| 3260 | if (printing[0] == 0) quote = US"\""; else |
| 3261 | { |
| 3262 | uschar *pp = printing; |
| 3263 | quote = US""; |
| 3264 | while (*pp != 0) if (isspace(*pp++)) { quote = US"\""; break; } |
| 3265 | } |
| 3266 | sprintf(CS p, " %s%.*s%s", quote, (int)(big_buffer_size - |
| 3267 | (p - big_buffer) - 4), printing, quote); |
| 3268 | while (*p) p++; |
| 3269 | } |
| 3270 | log_write(0, LOG_MAIN, "%s", big_buffer); |
| 3271 | } |
| 3272 | |
| 3273 | /* Set the working directory to be the top-level spool directory. We don't rely |
| 3274 | on this in the code, which always uses fully qualified names, but it's useful |
| 3275 | for core dumps etc. Don't complain if it fails - the spool directory might not |
| 3276 | be generally accessible and calls with the -C option (and others) have lost |
| 3277 | privilege by now. */ |
| 3278 | |
| 3279 | if (Uchdir(spool_directory) != 0) |
| 3280 | { |
| 3281 | (void)directory_make(spool_directory, US"", SPOOL_DIRECTORY_MODE, TRUE); |
| 3282 | (void)Uchdir(spool_directory); |
| 3283 | } |
| 3284 | |
| 3285 | /* Handle calls with the -bi option. This is a sendmail option to rebuild *the* |
| 3286 | alias file. Exim doesn't have such a concept, but this call is screwed into |
| 3287 | Sun's YP makefiles. Handle this by calling a configured script, as the real |
| 3288 | user who called Exim. The -oA option can be used to pass an argument to the |
| 3289 | script. */ |
| 3290 | |
| 3291 | if (bi_option) |
| 3292 | { |
| 3293 | fclose(config_file); |
| 3294 | if (bi_command != NULL) |
| 3295 | { |
| 3296 | int i = 0; |
| 3297 | uschar *argv[3]; |
| 3298 | argv[i++] = bi_command; |
| 3299 | if (alias_arg != NULL) argv[i++] = alias_arg; |
| 3300 | argv[i++] = NULL; |
| 3301 | |
| 3302 | setgroups(group_count, group_list); |
| 3303 | exim_setugid(real_uid, real_gid, FALSE, US"running bi_command"); |
| 3304 | |
| 3305 | DEBUG(D_exec) debug_printf("exec %.256s %.256s\n", argv[0], |
| 3306 | (argv[1] == NULL)? US"" : argv[1]); |
| 3307 | |
| 3308 | execv(CS argv[0], (char *const *)argv); |
| 3309 | fprintf(stderr, "exim: exec failed: %s\n", strerror(errno)); |
| 3310 | exit(EXIT_FAILURE); |
| 3311 | } |
| 3312 | else |
| 3313 | { |
| 3314 | DEBUG(D_any) debug_printf("-bi used but bi_command not set; exiting\n"); |
| 3315 | exit(EXIT_SUCCESS); |
| 3316 | } |
| 3317 | } |
| 3318 | |
| 3319 | /* If an action on specific messages is requested, or if a daemon or queue |
| 3320 | runner is being started, we need to know if Exim was called by an admin user. |
| 3321 | This is the case if the real user is root or exim, or if the real group is |
| 3322 | exim, or if one of the supplementary groups is exim or a group listed in |
| 3323 | admin_groups. We don't fail all message actions immediately if not admin_user, |
| 3324 | since some actions can be performed by non-admin users. Instead, set admin_user |
| 3325 | for later interrogation. */ |
| 3326 | |
| 3327 | if (real_uid == root_uid || real_uid == exim_uid || real_gid == exim_gid) |
| 3328 | admin_user = TRUE; |
| 3329 | else |
| 3330 | { |
| 3331 | int i, j; |
| 3332 | |
| 3333 | for (i = 0; i < group_count; i++) |
| 3334 | { |
| 3335 | if (group_list[i] == exim_gid) admin_user = TRUE; |
| 3336 | else if (admin_groups != NULL) |
| 3337 | { |
| 3338 | for (j = 1; j <= (int)(admin_groups[0]); j++) |
| 3339 | if (admin_groups[j] == group_list[i]) |
| 3340 | { admin_user = TRUE; break; } |
| 3341 | } |
| 3342 | if (admin_user) break; |
| 3343 | } |
| 3344 | } |
| 3345 | |
| 3346 | /* Another group of privileged users are the trusted users. These are root, |
| 3347 | exim, and any caller matching trusted_users or trusted_groups. Trusted callers |
| 3348 | are permitted to specify sender_addresses with -f on the command line, and |
| 3349 | other message parameters as well. */ |
| 3350 | |
| 3351 | if (real_uid == root_uid || real_uid == exim_uid) |
| 3352 | trusted_caller = TRUE; |
| 3353 | else |
| 3354 | { |
| 3355 | int i, j; |
| 3356 | |
| 3357 | if (trusted_users != NULL) |
| 3358 | { |
| 3359 | for (i = 1; i <= (int)(trusted_users[0]); i++) |
| 3360 | if (trusted_users[i] == real_uid) |
| 3361 | { trusted_caller = TRUE; break; } |
| 3362 | } |
| 3363 | |
| 3364 | if (!trusted_caller && trusted_groups != NULL) |
| 3365 | { |
| 3366 | for (i = 1; i <= (int)(trusted_groups[0]); i++) |
| 3367 | { |
| 3368 | if (trusted_groups[i] == real_gid) |
| 3369 | trusted_caller = TRUE; |
| 3370 | else for (j = 0; j < group_count; j++) |
| 3371 | { |
| 3372 | if (trusted_groups[i] == group_list[j]) |
| 3373 | { trusted_caller = TRUE; break; } |
| 3374 | } |
| 3375 | if (trusted_caller) break; |
| 3376 | } |
| 3377 | } |
| 3378 | } |
| 3379 | |
| 3380 | if (trusted_caller) DEBUG(D_any) debug_printf("trusted user\n"); |
| 3381 | if (admin_user) DEBUG(D_any) debug_printf("admin user\n"); |
| 3382 | |
| 3383 | /* Only an admin user may start the daemon or force a queue run in the default |
| 3384 | configuration, but the queue run restriction can be relaxed. Only an admin |
| 3385 | user may request that a message be returned to its sender forthwith. Only an |
| 3386 | admin user may specify a debug level greater than D_v (because it might show |
| 3387 | passwords, etc. in lookup queries). Only an admin user may request a queue |
| 3388 | count. */ |
| 3389 | |
| 3390 | if (!admin_user) |
| 3391 | { |
| 3392 | BOOL debugset = (debug_selector & ~D_v) != 0; |
| 3393 | if (deliver_give_up || daemon_listen || |
| 3394 | (count_queue && queue_list_requires_admin) || |
| 3395 | (list_queue && queue_list_requires_admin) || |
| 3396 | (queue_interval >= 0 && prod_requires_admin) || |
| 3397 | (debugset && !running_in_test_harness)) |
| 3398 | { |
| 3399 | fprintf(stderr, "exim:%s permission denied\n", debugset? " debugging" : ""); |
| 3400 | exit(EXIT_FAILURE); |
| 3401 | } |
| 3402 | } |
| 3403 | |
| 3404 | /* If the real user is not root or the exim uid, the argument for passing |
| 3405 | in an open TCP/IP connection for another message is not permitted, nor is |
| 3406 | running with the -N option for any delivery action, unless this call to exim is |
| 3407 | one that supplied an input message, or we are using a patched exim for |
| 3408 | regression testing. */ |
| 3409 | |
| 3410 | if (real_uid != root_uid && real_uid != exim_uid && |
| 3411 | (continue_hostname != NULL || |
| 3412 | (dont_deliver && |
| 3413 | (queue_interval >= 0 || daemon_listen || msg_action_arg > 0) |
| 3414 | )) && !running_in_test_harness) |
| 3415 | { |
| 3416 | fprintf(stderr, "exim: Permission denied\n"); |
| 3417 | return EXIT_FAILURE; |
| 3418 | } |
| 3419 | |
| 3420 | /* If the caller is not trusted, certain arguments are ignored when running for |
| 3421 | real, but are permitted when checking things (-be, -bv, -bt, -bh, -bf, -bF). |
| 3422 | Note that authority for performing certain actions on messages is tested in the |
| 3423 | queue_action() function. */ |
| 3424 | |
| 3425 | if (!trusted_caller && !checking && filter_test == FTEST_NONE) |
| 3426 | { |
| 3427 | sender_host_name = sender_host_address = interface_address = |
| 3428 | sender_ident = received_protocol = NULL; |
| 3429 | sender_host_port = interface_port = 0; |
| 3430 | sender_host_authenticated = authenticated_sender = authenticated_id = NULL; |
| 3431 | } |
| 3432 | |
| 3433 | /* If a sender host address is set, extract the optional port number off the |
| 3434 | end of it and check its syntax. Do the same thing for the interface address. |
| 3435 | Exim exits if the syntax is bad. */ |
| 3436 | |
| 3437 | else |
| 3438 | { |
| 3439 | if (sender_host_address != NULL) |
| 3440 | sender_host_port = check_port(sender_host_address); |
| 3441 | if (interface_address != NULL) |
| 3442 | interface_port = check_port(interface_address); |
| 3443 | } |
| 3444 | |
| 3445 | /* If an SMTP message is being received check to see if the standard input is a |
| 3446 | TCP/IP socket. If it is, we assume that Exim was called from inetd if the |
| 3447 | caller is root or the Exim user, or if the port is a privileged one. Otherwise, |
| 3448 | barf. */ |
| 3449 | |
| 3450 | if (smtp_input) |
| 3451 | { |
| 3452 | union sockaddr_46 inetd_sock; |
| 3453 | EXIM_SOCKLEN_T size = sizeof(inetd_sock); |
| 3454 | if (getpeername(0, (struct sockaddr *)(&inetd_sock), &size) == 0) |
| 3455 | { |
| 3456 | int family = ((struct sockaddr *)(&inetd_sock))->sa_family; |
| 3457 | if (family == AF_INET || family == AF_INET6) |
| 3458 | { |
| 3459 | union sockaddr_46 interface_sock; |
| 3460 | size = sizeof(interface_sock); |
| 3461 | |
| 3462 | if (getsockname(0, (struct sockaddr *)(&interface_sock), &size) == 0) |
| 3463 | interface_address = host_ntoa(-1, &interface_sock, NULL, |
| 3464 | &interface_port); |
| 3465 | |
| 3466 | if (host_is_tls_on_connect_port(interface_port)) tls_on_connect = TRUE; |
| 3467 | |
| 3468 | if (real_uid == root_uid || real_uid == exim_uid || interface_port < 1024) |
| 3469 | { |
| 3470 | is_inetd = TRUE; |
| 3471 | sender_host_address = host_ntoa(-1, (struct sockaddr *)(&inetd_sock), |
| 3472 | NULL, &sender_host_port); |
| 3473 | if (mua_wrapper) log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Input from " |
| 3474 | "inetd is not supported when mua_wrapper is set"); |
| 3475 | } |
| 3476 | else |
| 3477 | { |
| 3478 | fprintf(stderr, |
| 3479 | "exim: Permission denied (unprivileged user, unprivileged port)\n"); |
| 3480 | return EXIT_FAILURE; |
| 3481 | } |
| 3482 | } |
| 3483 | } |
| 3484 | } |
| 3485 | |
| 3486 | /* If the load average is going to be needed while receiving a message, get it |
| 3487 | now for those OS that require the first call to os_getloadavg() to be done as |
| 3488 | root. There will be further calls later for each message received. */ |
| 3489 | |
| 3490 | #ifdef LOAD_AVG_NEEDS_ROOT |
| 3491 | if (receiving_message && |
| 3492 | (queue_only_load >= 0 || |
| 3493 | (is_inetd && smtp_load_reserve >= 0) |
| 3494 | )) |
| 3495 | { |
| 3496 | load_average = os_getloadavg(); |
| 3497 | } |
| 3498 | #endif |
| 3499 | |
| 3500 | /* The queue_only configuration option can be overridden by -odx on the command |
| 3501 | line, except that if queue_only_override is false, queue_only cannot be unset |
| 3502 | from the command line. */ |
| 3503 | |
| 3504 | if (queue_only_set && (queue_only_override || arg_queue_only)) |
| 3505 | queue_only = arg_queue_only; |
| 3506 | |
| 3507 | /* The receive_timeout and smtp_receive_timeout options can be overridden by |
| 3508 | -or and -os. */ |
| 3509 | |
| 3510 | if (arg_receive_timeout >= 0) receive_timeout = arg_receive_timeout; |
| 3511 | if (arg_smtp_receive_timeout >= 0) |
| 3512 | smtp_receive_timeout = arg_smtp_receive_timeout; |
| 3513 | |
| 3514 | /* If Exim was started with root privilege, unless we have already removed the |
| 3515 | root privilege above as a result of -C, -D, -be, -bf or -bF, remove it now |
| 3516 | except when starting the daemon or doing some kind of delivery or address |
| 3517 | testing (-bt). These are the only cases when root need to be retained. We run |
| 3518 | as exim for -bv and -bh. However, if deliver_drop_privilege is set, root is |
| 3519 | retained only for starting the daemon. */ |
| 3520 | |
| 3521 | if (!unprivileged && /* originally had root AND */ |
| 3522 | !removed_privilege && /* still got root AND */ |
| 3523 | !daemon_listen && /* not starting the daemon */ |
| 3524 | queue_interval <= 0 && /* (either kind of daemon) */ |
| 3525 | ( /* AND EITHER */ |
| 3526 | deliver_drop_privilege || /* requested unprivileged */ |
| 3527 | ( /* OR */ |
| 3528 | queue_interval < 0 && /* not running the queue */ |
| 3529 | (msg_action_arg < 0 || /* and */ |
| 3530 | msg_action != MSG_DELIVER) && /* not delivering and */ |
| 3531 | (!checking || !address_test_mode) /* not address checking */ |
| 3532 | ) |
| 3533 | )) |
| 3534 | { |
| 3535 | exim_setugid(exim_uid, exim_gid, FALSE, US"privilege not needed"); |
| 3536 | } |
| 3537 | |
| 3538 | /* When we are retaining a privileged uid, we still change to the exim gid. */ |
| 3539 | |
| 3540 | else setgid(exim_gid); |
| 3541 | |
| 3542 | /* Handle a request to list the delivery queue */ |
| 3543 | |
| 3544 | if (list_queue) |
| 3545 | { |
| 3546 | set_process_info("listing the queue"); |
| 3547 | queue_list(list_queue_option, argv + recipients_arg, argc - recipients_arg); |
| 3548 | exit(EXIT_SUCCESS); |
| 3549 | } |
| 3550 | |
| 3551 | /* Handle a request to count the delivery queue */ |
| 3552 | |
| 3553 | if (count_queue) |
| 3554 | { |
| 3555 | set_process_info("counting the queue"); |
| 3556 | queue_count(); |
| 3557 | exit(EXIT_SUCCESS); |
| 3558 | } |
| 3559 | |
| 3560 | /* Handle actions on specific messages, except for the force delivery action, |
| 3561 | which is done below. Some actions take a whole list of message ids, which |
| 3562 | are known to continue up to the end of the arguments. Others take a single |
| 3563 | message id and then operate on the recipients list. */ |
| 3564 | |
| 3565 | if (msg_action_arg > 0 && msg_action != MSG_DELIVER) |
| 3566 | { |
| 3567 | int yield = EXIT_SUCCESS; |
| 3568 | set_process_info("acting on specified messages"); |
| 3569 | |
| 3570 | if (!one_msg_action) |
| 3571 | { |
| 3572 | for (i = msg_action_arg; i < argc; i++) |
| 3573 | if (!queue_action(argv[i], msg_action, NULL, 0, 0)) |
| 3574 | yield = EXIT_FAILURE; |
| 3575 | } |
| 3576 | |
| 3577 | else if (!queue_action(argv[msg_action_arg], msg_action, argv, argc, |
| 3578 | recipients_arg)) yield = EXIT_FAILURE; |
| 3579 | exit(yield); |
| 3580 | } |
| 3581 | |
| 3582 | /* All the modes below here require the remaining configuration sections |
| 3583 | to be read, except that we can skip over the ACL setting when delivering |
| 3584 | specific messages, or doing a queue run. (For various testing cases we could |
| 3585 | skip too, but as they are rare, it doesn't really matter.) The argument is TRUE |
| 3586 | for skipping. */ |
| 3587 | |
| 3588 | readconf_rest(msg_action_arg > 0 || (queue_interval == 0 && !daemon_listen)); |
| 3589 | |
| 3590 | /* The configuration data will have been read into POOL_PERM because we won't |
| 3591 | ever want to reset back past it. Change the current pool to POOL_MAIN. In fact, |
| 3592 | this is just a bit of pedantic tidiness. It wouldn't really matter if the |
| 3593 | configuration were read into POOL_MAIN, because we don't do any resets till |
| 3594 | later on. However, it seems right, and it does ensure that both pools get used. |
| 3595 | */ |
| 3596 | |
| 3597 | store_pool = POOL_MAIN; |
| 3598 | |
| 3599 | /* Handle the -brt option. This is for checking out retry configurations. |
| 3600 | The next three arguments are a domain name or a complete address, and |
| 3601 | optionally two error numbers. All it does is to call the function that |
| 3602 | scans the retry configuration data. */ |
| 3603 | |
| 3604 | if (test_retry_arg >= 0) |
| 3605 | { |
| 3606 | retry_config *yield; |
| 3607 | int basic_errno = 0; |
| 3608 | int more_errno = 0; |
| 3609 | uschar *s1, *s2; |
| 3610 | |
| 3611 | if (test_retry_arg >= argc) |
| 3612 | { |
| 3613 | printf("-brt needs a domain or address argument\n"); |
| 3614 | exim_exit(EXIT_FAILURE); |
| 3615 | } |
| 3616 | s1 = argv[test_retry_arg++]; |
| 3617 | s2 = NULL; |
| 3618 | |
| 3619 | /* If the first argument contains no @ and no . it might be a local user |
| 3620 | or it might be a single-component name. Treat as a domain. */ |
| 3621 | |
| 3622 | if (Ustrchr(s1, '@') == NULL && Ustrchr(s1, '.') == NULL) |
| 3623 | { |
| 3624 | printf("Warning: \"%s\" contains no '@' and no '.' characters. It is " |
| 3625 | "being \ntreated as a one-component domain, not as a local part.\n\n", |
| 3626 | s1); |
| 3627 | } |
| 3628 | |
| 3629 | /* There may be an optional second domain arg. */ |
| 3630 | |
| 3631 | if (test_retry_arg < argc && Ustrchr(argv[test_retry_arg], '.') != NULL) |
| 3632 | s2 = argv[test_retry_arg++]; |
| 3633 | |
| 3634 | /* The final arg is an error name */ |
| 3635 | |
| 3636 | if (test_retry_arg < argc) |
| 3637 | { |
| 3638 | uschar *ss = argv[test_retry_arg]; |
| 3639 | uschar *error = |
| 3640 | readconf_retry_error(ss, ss + Ustrlen(ss), &basic_errno, &more_errno); |
| 3641 | if (error != NULL) |
| 3642 | { |
| 3643 | printf("%s\n", CS error); |
| 3644 | return EXIT_FAILURE; |
| 3645 | } |
| 3646 | |
| 3647 | /* For the rcpt_4xx errors, a value of 255 means "any", and a code > 100 as |
| 3648 | an error is for matching codes to the decade. Turn them into a real error |
| 3649 | code, off the decade. */ |
| 3650 | |
| 3651 | if (basic_errno == ERRNO_RCPT4XX) |
| 3652 | { |
| 3653 | int code = (more_errno >> 8) & 255; |
| 3654 | if (code == 255) |
| 3655 | more_errno = (more_errno & 0xffff00ff) | (21 << 8); |
| 3656 | else if (code > 100) |
| 3657 | more_errno = (more_errno & 0xffff00ff) | ((code - 96) << 8); |
| 3658 | } |
| 3659 | } |
| 3660 | |
| 3661 | yield = retry_find_config(s1, s2, basic_errno, more_errno); |
| 3662 | if (yield == NULL) printf("No retry information found\n"); else |
| 3663 | { |
| 3664 | retry_rule *r; |
| 3665 | more_errno = yield->more_errno; |
| 3666 | printf("Retry rule: %s ", yield->pattern); |
| 3667 | |
| 3668 | if (yield->basic_errno == ERRNO_EXIMQUOTA) |
| 3669 | { |
| 3670 | printf("quota%s%s ", |
| 3671 | (more_errno > 0)? "_" : "", |
| 3672 | (more_errno > 0)? readconf_printtime(more_errno) : US""); |
| 3673 | } |
| 3674 | else if (yield->basic_errno == ECONNREFUSED) |
| 3675 | { |
| 3676 | printf("refused%s%s ", |
| 3677 | (more_errno > 0)? "_" : "", |
| 3678 | (more_errno == 'M')? "MX" : |
| 3679 | (more_errno == 'A')? "A" : ""); |
| 3680 | } |
| 3681 | else if (yield->basic_errno == ETIMEDOUT) |
| 3682 | { |
| 3683 | printf("timeout"); |
| 3684 | if ((more_errno & RTEF_CTOUT) != 0) printf("_connect"); |
| 3685 | more_errno &= 255; |
| 3686 | if (more_errno != 0) printf("_%s", |
| 3687 | (more_errno == 'M')? "MX" : "A"); |
| 3688 | printf(" "); |
| 3689 | } |
| 3690 | else if (yield->basic_errno == ERRNO_AUTHFAIL) |
| 3691 | printf("auth_failed "); |
| 3692 | else printf("* "); |
| 3693 | |
| 3694 | for (r = yield->rules; r != NULL; r = r->next) |
| 3695 | { |
| 3696 | printf("%c,%s", r->rule, readconf_printtime(r->timeout)); /* Do not */ |
| 3697 | printf(",%s", readconf_printtime(r->p1)); /* amalgamate */ |
| 3698 | if (r->rule == 'G') |
| 3699 | { |
| 3700 | int x = r->p2; |
| 3701 | int f = x % 1000; |
| 3702 | int d = 100; |
| 3703 | printf(",%d.", x/1000); |
| 3704 | do |
| 3705 | { |
| 3706 | printf("%d", f/d); |
| 3707 | f %= d; |
| 3708 | d /= 10; |
| 3709 | } |
| 3710 | while (f != 0); |
| 3711 | } |
| 3712 | printf("; "); |
| 3713 | } |
| 3714 | |
| 3715 | printf("\n"); |
| 3716 | } |
| 3717 | exim_exit(EXIT_SUCCESS); |
| 3718 | } |
| 3719 | |
| 3720 | /* Handle a request to list one or more configuration options */ |
| 3721 | |
| 3722 | if (list_options) |
| 3723 | { |
| 3724 | set_process_info("listing variables"); |
| 3725 | if (recipients_arg >= argc) readconf_print(US"all", NULL); |
| 3726 | else for (i = recipients_arg; i < argc; i++) |
| 3727 | { |
| 3728 | if (i < argc - 1 && |
| 3729 | (Ustrcmp(argv[i], "router") == 0 || |
| 3730 | Ustrcmp(argv[i], "transport") == 0 || |
| 3731 | Ustrcmp(argv[i], "authenticator") == 0)) |
| 3732 | { |
| 3733 | readconf_print(argv[i+1], argv[i]); |
| 3734 | i++; |
| 3735 | } |
| 3736 | else readconf_print(argv[i], NULL); |
| 3737 | } |
| 3738 | exim_exit(EXIT_SUCCESS); |
| 3739 | } |
| 3740 | |
| 3741 | |
| 3742 | /* Handle a request to deliver one or more messages that are already on the |
| 3743 | queue. Values of msg_action other than MSG_DELIVER are dealt with above. This |
| 3744 | is typically used for a small number when prodding by hand (when the option |
| 3745 | forced_delivery will be set) or when re-execing to regain root privilege. |
| 3746 | Each message delivery must happen in a separate process, so we fork a process |
| 3747 | for each one, and run them sequentially so that debugging output doesn't get |
| 3748 | intertwined, and to avoid spawning too many processes if a long list is given. |
| 3749 | However, don't fork for the last one; this saves a process in the common case |
| 3750 | when Exim is called to deliver just one message. */ |
| 3751 | |
| 3752 | if (msg_action_arg > 0) |
| 3753 | { |
| 3754 | if (prod_requires_admin && !admin_user) |
| 3755 | { |
| 3756 | fprintf(stderr, "exim: Permission denied\n"); |
| 3757 | exim_exit(EXIT_FAILURE); |
| 3758 | } |
| 3759 | set_process_info("delivering specified messages"); |
| 3760 | if (deliver_give_up) forced_delivery = deliver_force_thaw = TRUE; |
| 3761 | for (i = msg_action_arg; i < argc; i++) |
| 3762 | { |
| 3763 | int status; |
| 3764 | pid_t pid; |
| 3765 | if (i == argc - 1) |
| 3766 | (void)deliver_message(argv[i], forced_delivery, deliver_give_up); |
| 3767 | else if ((pid = fork()) == 0) |
| 3768 | { |
| 3769 | (void)deliver_message(argv[i], forced_delivery, deliver_give_up); |
| 3770 | _exit(EXIT_SUCCESS); |
| 3771 | } |
| 3772 | else if (pid < 0) |
| 3773 | { |
| 3774 | fprintf(stderr, "failed to fork delivery process for %s: %s\n", argv[i], |
| 3775 | strerror(errno)); |
| 3776 | exim_exit(EXIT_FAILURE); |
| 3777 | } |
| 3778 | else wait(&status); |
| 3779 | } |
| 3780 | exim_exit(EXIT_SUCCESS); |
| 3781 | } |
| 3782 | |
| 3783 | |
| 3784 | /* If only a single queue run is requested, without SMTP listening, we can just |
| 3785 | turn into a queue runner, with an optional starting message id. */ |
| 3786 | |
| 3787 | if (queue_interval == 0 && !daemon_listen) |
| 3788 | { |
| 3789 | DEBUG(D_queue_run) debug_printf("Single queue run%s%s%s%s\n", |
| 3790 | (start_queue_run_id == NULL)? US"" : US" starting at ", |
| 3791 | (start_queue_run_id == NULL)? US"" : start_queue_run_id, |
| 3792 | (stop_queue_run_id == NULL)? US"" : US" stopping at ", |
| 3793 | (stop_queue_run_id == NULL)? US"" : stop_queue_run_id); |
| 3794 | set_process_info("running the queue (single queue run)"); |
| 3795 | queue_run(start_queue_run_id, stop_queue_run_id, FALSE); |
| 3796 | exim_exit(EXIT_SUCCESS); |
| 3797 | } |
| 3798 | |
| 3799 | |
| 3800 | /* Find the login name of the real user running this process. This is always |
| 3801 | needed when receiving a message, because it is written into the spool file. It |
| 3802 | may also be used to construct a from: or a sender: header, and in this case we |
| 3803 | need the user's full name as well, so save a copy of it, checked for RFC822 |
| 3804 | syntax and munged if necessary, if it hasn't previously been set by the -F |
| 3805 | argument. We may try to get the passwd entry more than once, in case NIS or |
| 3806 | other delays are in evidence. Save the home directory for use in filter testing |
| 3807 | (only). */ |
| 3808 | |
| 3809 | for (i = 0;;) |
| 3810 | { |
| 3811 | if ((pw = getpwuid(real_uid)) != NULL) |
| 3812 | { |
| 3813 | originator_login = string_copy(US pw->pw_name); |
| 3814 | originator_home = string_copy(US pw->pw_dir); |
| 3815 | |
| 3816 | /* If user name has not been set by -F, set it from the passwd entry |
| 3817 | unless -f has been used to set the sender address by a trusted user. */ |
| 3818 | |
| 3819 | if (originator_name == NULL) |
| 3820 | { |
| 3821 | if (sender_address == NULL || |
| 3822 | (!trusted_caller && filter_test == FTEST_NONE)) |
| 3823 | { |
| 3824 | uschar *name = US pw->pw_gecos; |
| 3825 | uschar *amp = Ustrchr(name, '&'); |
| 3826 | uschar buffer[256]; |
| 3827 | |
| 3828 | /* Most Unix specify that a '&' character in the gecos field is |
| 3829 | replaced by a copy of the login name, and some even specify that |
| 3830 | the first character should be upper cased, so that's what we do. */ |
| 3831 | |
| 3832 | if (amp != NULL) |
| 3833 | { |
| 3834 | int loffset; |
| 3835 | string_format(buffer, sizeof(buffer), "%.*s%n%s%s", |
| 3836 | amp - name, name, &loffset, originator_login, amp + 1); |
| 3837 | buffer[loffset] = toupper(buffer[loffset]); |
| 3838 | name = buffer; |
| 3839 | } |
| 3840 | |
| 3841 | /* If a pattern for matching the gecos field was supplied, apply |
| 3842 | it and then expand the name string. */ |
| 3843 | |
| 3844 | if (gecos_pattern != NULL && gecos_name != NULL) |
| 3845 | { |
| 3846 | const pcre *re; |
| 3847 | re = regex_must_compile(gecos_pattern, FALSE, TRUE); /* Use malloc */ |
| 3848 | |
| 3849 | if (regex_match_and_setup(re, name, 0, -1)) |
| 3850 | { |
| 3851 | uschar *new_name = expand_string(gecos_name); |
| 3852 | expand_nmax = -1; |
| 3853 | if (new_name != NULL) |
| 3854 | { |
| 3855 | DEBUG(D_receive) debug_printf("user name \"%s\" extracted from " |
| 3856 | "gecos field \"%s\"\n", new_name, name); |
| 3857 | name = new_name; |
| 3858 | } |
| 3859 | else DEBUG(D_receive) debug_printf("failed to expand gecos_name string " |
| 3860 | "\"%s\": %s\n", gecos_name, expand_string_message); |
| 3861 | } |
| 3862 | else DEBUG(D_receive) debug_printf("gecos_pattern \"%s\" did not match " |
| 3863 | "gecos field \"%s\"\n", gecos_pattern, name); |
| 3864 | store_free((void *)re); |
| 3865 | } |
| 3866 | originator_name = string_copy(name); |
| 3867 | } |
| 3868 | |
| 3869 | /* A trusted caller has used -f but not -F */ |
| 3870 | |
| 3871 | else originator_name = US""; |
| 3872 | } |
| 3873 | |
| 3874 | /* Break the retry loop */ |
| 3875 | |
| 3876 | break; |
| 3877 | } |
| 3878 | |
| 3879 | if (++i > finduser_retries) break; |
| 3880 | sleep(1); |
| 3881 | } |
| 3882 | |
| 3883 | /* If we cannot get a user login, log the incident and give up, unless the |
| 3884 | configuration specifies something to use. When running in the test harness, |
| 3885 | any setting of unknown_login overrides the actual login name. */ |
| 3886 | |
| 3887 | if (originator_login == NULL || running_in_test_harness) |
| 3888 | { |
| 3889 | if (unknown_login != NULL) |
| 3890 | { |
| 3891 | originator_login = expand_string(unknown_login); |
| 3892 | if (originator_name == NULL && unknown_username != NULL) |
| 3893 | originator_name = expand_string(unknown_username); |
| 3894 | if (originator_name == NULL) originator_name = US""; |
| 3895 | } |
| 3896 | if (originator_login == NULL) |
| 3897 | log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Failed to get user name for uid %d", |
| 3898 | (int)real_uid); |
| 3899 | } |
| 3900 | |
| 3901 | /* Ensure that the user name is in a suitable form for use as a "phrase" in an |
| 3902 | RFC822 address.*/ |
| 3903 | |
| 3904 | originator_name = string_copy(parse_fix_phrase(originator_name, |
| 3905 | Ustrlen(originator_name), big_buffer, big_buffer_size)); |
| 3906 | |
| 3907 | /* If a message is created by this call of Exim, the uid/gid of its originator |
| 3908 | are those of the caller. These values are overridden if an existing message is |
| 3909 | read in from the spool. */ |
| 3910 | |
| 3911 | originator_uid = real_uid; |
| 3912 | originator_gid = real_gid; |
| 3913 | |
| 3914 | DEBUG(D_receive) debug_printf("originator: uid=%d gid=%d login=%s name=%s\n", |
| 3915 | (int)originator_uid, (int)originator_gid, originator_login, originator_name); |
| 3916 | |
| 3917 | /* Run in daemon and/or queue-running mode. The function daemon_go() never |
| 3918 | returns. We leave this till here so that the originator_ fields are available |
| 3919 | for incoming messages via the daemon. */ |
| 3920 | |
| 3921 | if (daemon_listen || queue_interval > 0) |
| 3922 | { |
| 3923 | if (mua_wrapper) log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Daemon cannot be " |
| 3924 | "run when mua_wrapper is set"); |
| 3925 | daemon_go(); |
| 3926 | } |
| 3927 | |
| 3928 | /* If the sender ident has not been set (by a trusted caller) set it to |
| 3929 | the caller. This will get overwritten below for an inetd call. If a trusted |
| 3930 | caller has set it empty, unset it. */ |
| 3931 | |
| 3932 | if (sender_ident == NULL) sender_ident = originator_login; |
| 3933 | else if (sender_ident[0] == 0) sender_ident = NULL; |
| 3934 | |
| 3935 | /* Handle the -brw option, which is for checking out rewriting rules. Cause log |
| 3936 | writes (on errors) to go to stderr instead. Can't do this earlier, as want the |
| 3937 | originator_* variables set. */ |
| 3938 | |
| 3939 | if (test_rewrite_arg >= 0) |
| 3940 | { |
| 3941 | really_exim = FALSE; |
| 3942 | if (test_rewrite_arg >= argc) |
| 3943 | { |
| 3944 | printf("-brw needs an address argument\n"); |
| 3945 | exim_exit(EXIT_FAILURE); |
| 3946 | } |
| 3947 | rewrite_test(argv[test_rewrite_arg]); |
| 3948 | exim_exit(EXIT_SUCCESS); |
| 3949 | } |
| 3950 | |
| 3951 | /* A locally-supplied message is considered to be coming from a local user |
| 3952 | unless a trusted caller supplies a sender address with -f, or is passing in the |
| 3953 | message via SMTP (inetd invocation or otherwise). */ |
| 3954 | |
| 3955 | if ((sender_address == NULL && !smtp_input) || |
| 3956 | (!trusted_caller && filter_test == FTEST_NONE)) |
| 3957 | { |
| 3958 | sender_local = TRUE; |
| 3959 | |
| 3960 | /* A trusted caller can supply authenticated_sender and authenticated_id |
| 3961 | via -oMas and -oMai and if so, they will already be set. */ |
| 3962 | |
| 3963 | if (authenticated_sender == NULL) |
| 3964 | authenticated_sender = string_sprintf("%s@%s", originator_login, |
| 3965 | qualify_domain_sender); |
| 3966 | if (authenticated_id == NULL) authenticated_id = originator_login; |
| 3967 | } |
| 3968 | |
| 3969 | /* Trusted callers are always permitted to specify the sender address. |
| 3970 | Untrusted callers may specify it if it matches untrusted_set_sender, or if what |
| 3971 | is specified is the empty address. However, if a trusted caller does not |
| 3972 | specify a sender address for SMTP input, we leave sender_address unset. This |
| 3973 | causes the MAIL commands to be honoured. */ |
| 3974 | |
| 3975 | if ((!smtp_input && sender_address == NULL) || |
| 3976 | !receive_check_set_sender(sender_address)) |
| 3977 | { |
| 3978 | /* Either the caller is not permitted to set a general sender, or this is |
| 3979 | non-SMTP input and the trusted caller has not set a sender. If there is no |
| 3980 | sender, or if a sender other than <> is set, override with the originator's |
| 3981 | login (which will get qualified below), except when checking things. */ |
| 3982 | |
| 3983 | if (sender_address == NULL /* No sender_address set */ |
| 3984 | || /* OR */ |
| 3985 | (sender_address[0] != 0 && /* Non-empty sender address, AND */ |
| 3986 | !checking && /* Not running tests, AND */ |
| 3987 | filter_test == FTEST_NONE)) /* Not testing a filter */ |
| 3988 | { |
| 3989 | sender_address = originator_login; |
| 3990 | sender_address_forced = FALSE; |
| 3991 | sender_address_domain = 0; |
| 3992 | } |
| 3993 | } |
| 3994 | |
| 3995 | /* Remember whether an untrusted caller set the sender address */ |
| 3996 | |
| 3997 | sender_set_untrusted = sender_address != originator_login && !trusted_caller; |
| 3998 | |
| 3999 | /* Ensure that the sender address is fully qualified unless it is the empty |
| 4000 | address, which indicates an error message, or doesn't exist (root caller, smtp |
| 4001 | interface, no -f argument). */ |
| 4002 | |
| 4003 | if (sender_address != NULL && sender_address[0] != 0 && |
| 4004 | sender_address_domain == 0) |
| 4005 | sender_address = string_sprintf("%s@%s", local_part_quote(sender_address), |
| 4006 | qualify_domain_sender); |
| 4007 | |
| 4008 | DEBUG(D_receive) debug_printf("sender address = %s\n", sender_address); |
| 4009 | |
| 4010 | /* Handle a request to verify a list of addresses, or test them for delivery. |
| 4011 | This must follow the setting of the sender address, since routers can be |
| 4012 | predicated upon the sender. If no arguments are given, read addresses from |
| 4013 | stdin. Set debug_level to at least D_v to get full output for address testing. |
| 4014 | */ |
| 4015 | |
| 4016 | if (verify_address_mode || address_test_mode) |
| 4017 | { |
| 4018 | int exit_value = 0; |
| 4019 | int flags = vopt_qualify; |
| 4020 | |
| 4021 | if (verify_address_mode) |
| 4022 | { |
| 4023 | if (!verify_as_sender) flags |= vopt_is_recipient; |
| 4024 | DEBUG(D_verify) debug_print_ids(US"Verifying:"); |
| 4025 | } |
| 4026 | |
| 4027 | else |
| 4028 | { |
| 4029 | flags |= vopt_is_recipient; |
| 4030 | debug_selector |= D_v; |
| 4031 | debug_file = stderr; |
| 4032 | debug_fd = fileno(debug_file); |
| 4033 | DEBUG(D_verify) debug_print_ids(US"Address testing:"); |
| 4034 | } |
| 4035 | |
| 4036 | if (recipients_arg < argc) |
| 4037 | { |
| 4038 | while (recipients_arg < argc) |
| 4039 | { |
| 4040 | uschar *s = argv[recipients_arg++]; |
| 4041 | while (*s != 0) |
| 4042 | { |
| 4043 | BOOL finished = FALSE; |
| 4044 | uschar *ss = parse_find_address_end(s, FALSE); |
| 4045 | if (*ss == ',') *ss = 0; else finished = TRUE; |
| 4046 | test_address(s, flags, &exit_value); |
| 4047 | s = ss; |
| 4048 | if (!finished) |
| 4049 | while (*(++s) != 0 && (*s == ',' || isspace(*s))); |
| 4050 | } |
| 4051 | } |
| 4052 | } |
| 4053 | |
| 4054 | else for (;;) |
| 4055 | { |
| 4056 | uschar *s = get_stdinput(NULL, NULL); |
| 4057 | if (s == NULL) break; |
| 4058 | test_address(s, flags, &exit_value); |
| 4059 | } |
| 4060 | |
| 4061 | route_tidyup(); |
| 4062 | exim_exit(exit_value); |
| 4063 | } |
| 4064 | |
| 4065 | /* Handle expansion checking */ |
| 4066 | |
| 4067 | if (expansion_test) |
| 4068 | { |
| 4069 | if (recipients_arg < argc) |
| 4070 | { |
| 4071 | while (recipients_arg < argc) |
| 4072 | { |
| 4073 | uschar *s = argv[recipients_arg++]; |
| 4074 | uschar *ss = expand_string(s); |
| 4075 | if (ss == NULL) |
| 4076 | printf ("Failed: %s\n", expand_string_message); |
| 4077 | else printf("%s\n", CS ss); |
| 4078 | } |
| 4079 | } |
| 4080 | |
| 4081 | /* Read stdin */ |
| 4082 | |
| 4083 | else |
| 4084 | { |
| 4085 | char *(*fn_readline)(char *) = NULL; |
| 4086 | char *(*fn_addhist)(char *) = NULL; |
| 4087 | |
| 4088 | #ifdef USE_READLINE |
| 4089 | void *dlhandle = set_readline(&fn_readline, &fn_addhist); |
| 4090 | #endif |
| 4091 | |
| 4092 | for (;;) |
| 4093 | { |
| 4094 | uschar *ss; |
| 4095 | uschar *source = get_stdinput(fn_readline, fn_addhist); |
| 4096 | if (source == NULL) break; |
| 4097 | ss = expand_string(source); |
| 4098 | if (ss == NULL) |
| 4099 | printf ("Failed: %s\n", expand_string_message); |
| 4100 | else printf("%s\n", CS ss); |
| 4101 | } |
| 4102 | |
| 4103 | #ifdef USE_READLINE |
| 4104 | if (dlhandle != NULL) dlclose(dlhandle); |
| 4105 | #endif |
| 4106 | } |
| 4107 | |
| 4108 | exim_exit(EXIT_SUCCESS); |
| 4109 | } |
| 4110 | |
| 4111 | |
| 4112 | /* The active host name is normally the primary host name, but it can be varied |
| 4113 | for hosts that want to play several parts at once. We need to ensure that it is |
| 4114 | set for host checking, and for receiving messages. */ |
| 4115 | |
| 4116 | smtp_active_hostname = primary_hostname; |
| 4117 | if (raw_active_hostname != NULL) |
| 4118 | { |
| 4119 | uschar *nah = expand_string(raw_active_hostname); |
| 4120 | if (nah == NULL) |
| 4121 | { |
| 4122 | if (!expand_string_forcedfail) |
| 4123 | log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to expand \"%s\" " |
| 4124 | "(smtp_active_hostname): %s", raw_active_hostname, |
| 4125 | expand_string_message); |
| 4126 | } |
| 4127 | else if (nah[0] != 0) smtp_active_hostname = nah; |
| 4128 | } |
| 4129 | |
| 4130 | /* Handle host checking: this facility mocks up an incoming SMTP call from a |
| 4131 | given IP address so that the blocking and relay configuration can be tested. An |
| 4132 | RFC 1413 call is made only if we are running in the test harness and an |
| 4133 | incoming interface and both ports are specified, because there is no TCP/IP |
| 4134 | call to find the ident for. */ |
| 4135 | |
| 4136 | if (host_checking) |
| 4137 | { |
| 4138 | int x[4]; |
| 4139 | int size; |
| 4140 | |
| 4141 | sender_ident = NULL; |
| 4142 | if (running_in_test_harness && sender_host_port != 0 && |
| 4143 | interface_address != NULL && interface_port != 0) |
| 4144 | verify_get_ident(1413); |
| 4145 | |
| 4146 | /* In case the given address is a non-canonical IPv6 address, canonicize |
| 4147 | it. The code works for both IPv4 and IPv6, as it happens. */ |
| 4148 | |
| 4149 | size = host_aton(sender_host_address, x); |
| 4150 | sender_host_address = store_get(48); /* large enough for full IPv6 */ |
| 4151 | (void)host_nmtoa(size, x, -1, sender_host_address, ':'); |
| 4152 | |
| 4153 | /* Now set up for testing */ |
| 4154 | |
| 4155 | host_build_sender_fullhost(); |
| 4156 | smtp_input = TRUE; |
| 4157 | smtp_in = stdin; |
| 4158 | smtp_out = stdout; |
| 4159 | sender_local = FALSE; |
| 4160 | sender_host_notsocket = TRUE; |
| 4161 | debug_file = stderr; |
| 4162 | debug_fd = fileno(debug_file); |
| 4163 | fprintf(stdout, "\n**** SMTP testing session as if from host %s\n" |
| 4164 | "**** but without any ident (RFC 1413) callback.\n" |
| 4165 | "**** This is not for real!\n\n", |
| 4166 | sender_host_address); |
| 4167 | |
| 4168 | if (verify_check_host(&hosts_connection_nolog) == OK) |
| 4169 | log_write_selector &= ~L_smtp_connection; |
| 4170 | log_write(L_smtp_connection, LOG_MAIN, "%s", smtp_get_connection_info()); |
| 4171 | |
| 4172 | if (smtp_start_session()) |
| 4173 | { |
| 4174 | reset_point = store_get(0); |
| 4175 | for (;;) |
| 4176 | { |
| 4177 | store_reset(reset_point); |
| 4178 | if (smtp_setup_msg() <= 0) break; |
| 4179 | if (!receive_msg(FALSE)) break; |
| 4180 | } |
| 4181 | } |
| 4182 | exim_exit(EXIT_SUCCESS); |
| 4183 | } |
| 4184 | |
| 4185 | |
| 4186 | /* Arrange for message reception if recipients or SMTP were specified; |
| 4187 | otherwise complain unless a version print (-bV) happened or this is a filter |
| 4188 | verification test. In the former case, show the configuration file name. */ |
| 4189 | |
| 4190 | if (recipients_arg >= argc && !extract_recipients && !smtp_input) |
| 4191 | { |
| 4192 | if (version_printed) |
| 4193 | { |
| 4194 | printf("Configuration file is %s\n", config_main_filename); |
| 4195 | return EXIT_SUCCESS; |
| 4196 | } |
| 4197 | if (filter_test == FTEST_NONE) |
| 4198 | { |
| 4199 | fprintf(stderr, |
| 4200 | "Exim is a Mail Transfer Agent. It is normally called by Mail User Agents,\n" |
| 4201 | "not directly from a shell command line. Options and/or arguments control\n" |
| 4202 | "what it does when called. For a list of options, see the Exim documentation.\n"); |
| 4203 | return EXIT_FAILURE; |
| 4204 | } |
| 4205 | } |
| 4206 | |
| 4207 | |
| 4208 | /* If mua_wrapper is set, Exim is being used to turn an MUA that submits on the |
| 4209 | standard input into an MUA that submits to a smarthost over TCP/IP. We know |
| 4210 | that we are not called from inetd, because that is rejected above. The |
| 4211 | following configuration settings are forced here: |
| 4212 | |
| 4213 | (1) Synchronous delivery (-odi) |
| 4214 | (2) Errors to stderr (-oep == -oeq) |
| 4215 | (3) No parallel remote delivery |
| 4216 | (4) Unprivileged delivery |
| 4217 | |
| 4218 | We don't force overall queueing options because there are several of them; |
| 4219 | instead, queueing is avoided below when mua_wrapper is set. However, we do need |
| 4220 | to override any SMTP queueing. */ |
| 4221 | |
| 4222 | if (mua_wrapper) |
| 4223 | { |
| 4224 | synchronous_delivery = TRUE; |
| 4225 | arg_error_handling = ERRORS_STDERR; |
| 4226 | remote_max_parallel = 1; |
| 4227 | deliver_drop_privilege = TRUE; |
| 4228 | queue_smtp = FALSE; |
| 4229 | queue_smtp_domains = NULL; |
| 4230 | } |
| 4231 | |
| 4232 | |
| 4233 | /* Prepare to accept one or more new messages on the standard input. When a |
| 4234 | message has been read, its id is returned in message_id[]. If doing immediate |
| 4235 | delivery, we fork a delivery process for each received message, except for the |
| 4236 | last one, where we can save a process switch. |
| 4237 | |
| 4238 | It is only in non-smtp mode that error_handling is allowed to be changed from |
| 4239 | its default of ERRORS_SENDER by argument. (Idle thought: are any of the |
| 4240 | sendmail error modes other than -oem ever actually used? Later: yes.) */ |
| 4241 | |
| 4242 | if (!smtp_input) error_handling = arg_error_handling; |
| 4243 | |
| 4244 | /* If this is an inetd call, ensure that stderr is closed to prevent panic |
| 4245 | logging being sent down the socket and make an identd call to get the |
| 4246 | sender_ident. */ |
| 4247 | |
| 4248 | else if (is_inetd) |
| 4249 | { |
| 4250 | fclose(stderr); |
| 4251 | exim_nullstd(); /* Re-open to /dev/null */ |
| 4252 | verify_get_ident(IDENT_PORT); |
| 4253 | host_build_sender_fullhost(); |
| 4254 | set_process_info("handling incoming connection from %s via inetd", |
| 4255 | sender_fullhost); |
| 4256 | } |
| 4257 | |
| 4258 | /* If the sender host address has been set, build sender_fullhost if it hasn't |
| 4259 | already been done (which it will have been for inetd). This caters for the |
| 4260 | case when it is forced by -oMa. However, we must flag that it isn't a socket, |
| 4261 | so that the test for IP options is skipped for -bs input. */ |
| 4262 | |
| 4263 | if (sender_host_address != NULL && sender_fullhost == NULL) |
| 4264 | { |
| 4265 | host_build_sender_fullhost(); |
| 4266 | set_process_info("handling incoming connection from %s via -oMa", |
| 4267 | sender_fullhost); |
| 4268 | sender_host_notsocket = TRUE; |
| 4269 | } |
| 4270 | |
| 4271 | /* Otherwise, set the sender host as unknown except for inetd calls. This |
| 4272 | prevents host checking in the case of -bs not from inetd and also for -bS. */ |
| 4273 | |
| 4274 | else if (!is_inetd) sender_host_unknown = TRUE; |
| 4275 | |
| 4276 | /* If stdout does not exist, then dup stdin to stdout. This can happen |
| 4277 | if exim is started from inetd. In this case fd 0 will be set to the socket, |
| 4278 | but fd 1 will not be set. This also happens for passed SMTP channels. */ |
| 4279 | |
| 4280 | if (fstat(1, &statbuf) < 0) dup2(0, 1); |
| 4281 | |
| 4282 | /* Set up the incoming protocol name and the state of the program. Root |
| 4283 | is allowed to force received protocol via the -oMr option above, and if we are |
| 4284 | in a non-local SMTP state it means we have come via inetd and the process info |
| 4285 | has already been set up. We don't set received_protocol here for smtp input, |
| 4286 | as it varies according to batch/HELO/EHLO/AUTH/TLS. */ |
| 4287 | |
| 4288 | if (smtp_input) |
| 4289 | { |
| 4290 | if (sender_local) set_process_info("accepting a local SMTP message from <%s>", |
| 4291 | sender_address); |
| 4292 | } |
| 4293 | else |
| 4294 | { |
| 4295 | if (received_protocol == NULL) |
| 4296 | received_protocol = string_sprintf("local%s", called_as); |
| 4297 | set_process_info("accepting a local non-SMTP message from <%s>", |
| 4298 | sender_address); |
| 4299 | } |
| 4300 | |
| 4301 | /* Initialize the local_queue-only flag (this will be ignored if mua_wrapper is |
| 4302 | set) */ |
| 4303 | |
| 4304 | queue_check_only(); |
| 4305 | local_queue_only = queue_only; |
| 4306 | |
| 4307 | /* For non-SMTP and for batched SMTP input, check that there is enough space on |
| 4308 | the spool if so configured. On failure, we must not attempt to send an error |
| 4309 | message! (For interactive SMTP, the check happens at MAIL FROM and an SMTP |
| 4310 | error code is given.) */ |
| 4311 | |
| 4312 | if ((!smtp_input || smtp_batched_input) && !receive_check_fs(0)) |
| 4313 | { |
| 4314 | fprintf(stderr, "exim: insufficient disk space\n"); |
| 4315 | return EXIT_FAILURE; |
| 4316 | } |
| 4317 | |
| 4318 | /* If this is smtp input of any kind, handle the start of the SMTP |
| 4319 | session. */ |
| 4320 | |
| 4321 | if (smtp_input) |
| 4322 | { |
| 4323 | smtp_in = stdin; |
| 4324 | smtp_out = stdout; |
| 4325 | if (verify_check_host(&hosts_connection_nolog) == OK) |
| 4326 | log_write_selector &= ~L_smtp_connection; |
| 4327 | log_write(L_smtp_connection, LOG_MAIN, "%s", smtp_get_connection_info()); |
| 4328 | if (!smtp_start_session()) |
| 4329 | { |
| 4330 | mac_smtp_fflush(); |
| 4331 | exim_exit(EXIT_SUCCESS); |
| 4332 | } |
| 4333 | } |
| 4334 | |
| 4335 | /* Otherwise, set up the input size limit here */ |
| 4336 | |
| 4337 | else |
| 4338 | { |
| 4339 | thismessage_size_limit = expand_string_integer(message_size_limit); |
| 4340 | if (thismessage_size_limit < 0) |
| 4341 | { |
| 4342 | if (thismessage_size_limit == -1) |
| 4343 | log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to expand " |
| 4344 | "message_size_limit: %s", expand_string_message); |
| 4345 | else |
| 4346 | log_write(0, LOG_MAIN|LOG_PANIC_DIE, "invalid value for " |
| 4347 | "message_size_limit: %s", expand_string_message); |
| 4348 | } |
| 4349 | } |
| 4350 | |
| 4351 | /* Loop for several messages when reading SMTP input. If we fork any child |
| 4352 | processes, we don't want to wait for them unless synchronous delivery is |
| 4353 | requested, so set SIGCHLD to SIG_IGN in that case. This is not necessarily the |
| 4354 | same as SIG_DFL, despite the fact that documentation often lists the default as |
| 4355 | "ignore". This is a confusing area. This is what I know: |
| 4356 | |
| 4357 | At least on some systems (e.g. Solaris), just setting SIG_IGN causes child |
| 4358 | processes that complete simply to go away without ever becoming defunct. You |
| 4359 | can't then wait for them - but we don't want to wait for them in the |
| 4360 | non-synchronous delivery case. However, this behaviour of SIG_IGN doesn't |
| 4361 | happen for all OS (e.g. *BSD is different). |
| 4362 | |
| 4363 | But that's not the end of the story. Some (many? all?) systems have the |
| 4364 | SA_NOCLDWAIT option for sigaction(). This requests the behaviour that Solaris |
| 4365 | has by default, so it seems that the difference is merely one of default |
| 4366 | (compare restarting vs non-restarting signals). |
| 4367 | |
| 4368 | To cover all cases, Exim sets SIG_IGN with SA_NOCLDWAIT here if it can. If not, |
| 4369 | it just sets SIG_IGN. To be on the safe side it also calls waitpid() at the end |
| 4370 | of the loop below. Paranoia rules. |
| 4371 | |
| 4372 | February 2003: That's *still* not the end of the story. There are now versions |
| 4373 | of Linux (where SIG_IGN does work) that are picky. If, having set SIG_IGN, a |
| 4374 | process then calls waitpid(), a grumble is written to the system log, because |
| 4375 | this is logically inconsistent. In other words, it doesn't like the paranoia. |
| 4376 | As a consequenc of this, the waitpid() below is now excluded if we are sure |
| 4377 | that SIG_IGN works. */ |
| 4378 | |
| 4379 | if (!synchronous_delivery) |
| 4380 | { |
| 4381 | #ifdef SA_NOCLDWAIT |
| 4382 | struct sigaction act; |
| 4383 | act.sa_handler = SIG_IGN; |
| 4384 | sigemptyset(&(act.sa_mask)); |
| 4385 | act.sa_flags = SA_NOCLDWAIT; |
| 4386 | sigaction(SIGCHLD, &act, NULL); |
| 4387 | #else |
| 4388 | signal(SIGCHLD, SIG_IGN); |
| 4389 | #endif |
| 4390 | } |
| 4391 | |
| 4392 | /* Save the current store pool point, for resetting at the start of |
| 4393 | each message, and save the real sender address, if any. */ |
| 4394 | |
| 4395 | reset_point = store_get(0); |
| 4396 | real_sender_address = sender_address; |
| 4397 | |
| 4398 | /* Loop to receive messages; receive_msg() returns TRUE if there are more |
| 4399 | messages to be read (SMTP input), or FALSE otherwise (not SMTP, or SMTP channel |
| 4400 | collapsed). */ |
| 4401 | |
| 4402 | while (more) |
| 4403 | { |
| 4404 | store_reset(reset_point); |
| 4405 | message_id[0] = 0; |
| 4406 | |
| 4407 | /* In the SMTP case, we have to handle the initial SMTP input and build the |
| 4408 | recipients list, before calling receive_msg() to read the message proper. |
| 4409 | Whatever sender address is actually given in the SMTP transaction is |
| 4410 | actually ignored for local senders - we use the actual sender, which is |
| 4411 | normally either the underlying user running this process or a -f argument |
| 4412 | provided by a trusted caller. It is saved in real_sender_address. |
| 4413 | |
| 4414 | However, if this value is NULL, we are dealing with a trusted caller when |
| 4415 | -f was not used; in this case, the SMTP sender is allowed to stand. |
| 4416 | |
| 4417 | Also, if untrusted_set_sender is set, we permit sender addresses that match |
| 4418 | anything in its list. |
| 4419 | |
| 4420 | The variable raw_sender_address holds the sender address before rewriting. */ |
| 4421 | |
| 4422 | if (smtp_input) |
| 4423 | { |
| 4424 | int rc; |
| 4425 | if ((rc = smtp_setup_msg()) > 0) |
| 4426 | { |
| 4427 | if (real_sender_address != NULL && |
| 4428 | !receive_check_set_sender(sender_address)) |
| 4429 | { |
| 4430 | sender_address = raw_sender = real_sender_address; |
| 4431 | sender_address_unrewritten = NULL; |
| 4432 | } |
| 4433 | more = receive_msg(extract_recipients); |
| 4434 | if (message_id[0] == 0) |
| 4435 | { |
| 4436 | if (more) continue; |
| 4437 | exim_exit(EXIT_FAILURE); |
| 4438 | } |
| 4439 | } |
| 4440 | else exim_exit((rc == 0)? EXIT_SUCCESS : EXIT_FAILURE); |
| 4441 | } |
| 4442 | |
| 4443 | /* In the non-SMTP case, we have all the information from the command |
| 4444 | line, but must process it in case it is in the more general RFC822 |
| 4445 | format, and in any case, to detect syntax errors. Also, it appears that |
| 4446 | the use of comma-separated lists as single arguments is common, so we |
| 4447 | had better support them. */ |
| 4448 | |
| 4449 | else |
| 4450 | { |
| 4451 | int i; |
| 4452 | int rcount = 0; |
| 4453 | int count = argc - recipients_arg; |
| 4454 | uschar **list = argv + recipients_arg; |
| 4455 | |
| 4456 | /* These options cannot be changed dynamically for non-SMTP messages */ |
| 4457 | |
| 4458 | active_local_sender_retain = local_sender_retain; |
| 4459 | active_local_from_check = local_from_check; |
| 4460 | |
| 4461 | /* Save before any rewriting */ |
| 4462 | |
| 4463 | raw_sender = string_copy(sender_address); |
| 4464 | |
| 4465 | /* Loop for each argument */ |
| 4466 | |
| 4467 | for (i = 0; i < count; i++) |
| 4468 | { |
| 4469 | int start, end, domain; |
| 4470 | uschar *errmess; |
| 4471 | uschar *s = list[i]; |
| 4472 | |
| 4473 | /* Loop for each comma-separated address */ |
| 4474 | |
| 4475 | while (*s != 0) |
| 4476 | { |
| 4477 | BOOL finished = FALSE; |
| 4478 | uschar *recipient; |
| 4479 | uschar *ss = parse_find_address_end(s, FALSE); |
| 4480 | |
| 4481 | if (*ss == ',') *ss = 0; else finished = TRUE; |
| 4482 | |
| 4483 | /* Check max recipients - if -t was used, these aren't recipients */ |
| 4484 | |
| 4485 | if (recipients_max > 0 && ++rcount > recipients_max && |
| 4486 | !extract_recipients) |
| 4487 | { |
| 4488 | if (error_handling == ERRORS_STDERR) |
| 4489 | { |
| 4490 | fprintf(stderr, "exim: too many recipients\n"); |
| 4491 | exim_exit(EXIT_FAILURE); |
| 4492 | } |
| 4493 | else |
| 4494 | { |
| 4495 | return |
| 4496 | moan_to_sender(ERRMESS_TOOMANYRECIP, NULL, NULL, stdin, TRUE)? |
| 4497 | errors_sender_rc : EXIT_FAILURE; |
| 4498 | } |
| 4499 | } |
| 4500 | |
| 4501 | recipient = |
| 4502 | parse_extract_address(s, &errmess, &start, &end, &domain, FALSE); |
| 4503 | |
| 4504 | if (domain == 0 && !allow_unqualified_recipient) |
| 4505 | { |
| 4506 | recipient = NULL; |
| 4507 | errmess = US"unqualified recipient address not allowed"; |
| 4508 | } |
| 4509 | |
| 4510 | if (recipient == NULL) |
| 4511 | { |
| 4512 | if (error_handling == ERRORS_STDERR) |
| 4513 | { |
| 4514 | fprintf(stderr, "exim: bad recipient address \"%s\": %s\n", |
| 4515 | string_printing(list[i]), errmess); |
| 4516 | exim_exit(EXIT_FAILURE); |
| 4517 | } |
| 4518 | else |
| 4519 | { |
| 4520 | error_block eblock; |
| 4521 | eblock.next = NULL; |
| 4522 | eblock.text1 = string_printing(list[i]); |
| 4523 | eblock.text2 = errmess; |
| 4524 | return |
| 4525 | moan_to_sender(ERRMESS_BADARGADDRESS, &eblock, NULL, stdin, TRUE)? |
| 4526 | errors_sender_rc : EXIT_FAILURE; |
| 4527 | } |
| 4528 | } |
| 4529 | |
| 4530 | receive_add_recipient(recipient, -1); |
| 4531 | s = ss; |
| 4532 | if (!finished) |
| 4533 | while (*(++s) != 0 && (*s == ',' || isspace(*s))); |
| 4534 | } |
| 4535 | } |
| 4536 | |
| 4537 | /* Show the recipients when debugging */ |
| 4538 | |
| 4539 | DEBUG(D_receive) |
| 4540 | { |
| 4541 | int i; |
| 4542 | if (sender_address != NULL) debug_printf("Sender: %s\n", sender_address); |
| 4543 | if (recipients_list != NULL) |
| 4544 | { |
| 4545 | debug_printf("Recipients:\n"); |
| 4546 | for (i = 0; i < recipients_count; i++) |
| 4547 | debug_printf(" %s\n", recipients_list[i].address); |
| 4548 | } |
| 4549 | } |
| 4550 | |
| 4551 | /* Read the data for the message. If filter_test is not FTEST_NONE, this |
| 4552 | will just read the headers for the message, and not write anything onto the |
| 4553 | spool. */ |
| 4554 | |
| 4555 | message_ended = END_NOTENDED; |
| 4556 | more = receive_msg(extract_recipients); |
| 4557 | |
| 4558 | /* more is always FALSE here (not SMTP message) when reading a message |
| 4559 | for real; when reading the headers of a message for filter testing, |
| 4560 | it is TRUE if the headers were terminated by '.' and FALSE otherwise. */ |
| 4561 | |
| 4562 | if (message_id[0] == 0) exim_exit(EXIT_FAILURE); |
| 4563 | } /* Non-SMTP message reception */ |
| 4564 | |
| 4565 | /* If this is a filter testing run, there are headers in store, but |
| 4566 | no message on the spool. Run the filtering code in testing mode, setting |
| 4567 | the domain to the qualify domain and the local part to the current user, |
| 4568 | unless they have been set by options. The prefix and suffix are left unset |
| 4569 | unless specified. The the return path is set to to the sender unless it has |
| 4570 | already been set from a return-path header in the message. */ |
| 4571 | |
| 4572 | if (filter_test != FTEST_NONE) |
| 4573 | { |
| 4574 | deliver_domain = (ftest_domain != NULL)? |
| 4575 | ftest_domain : qualify_domain_recipient; |
| 4576 | deliver_domain_orig = deliver_domain; |
| 4577 | deliver_localpart = (ftest_localpart != NULL)? |
| 4578 | ftest_localpart : originator_login; |
| 4579 | deliver_localpart_orig = deliver_localpart; |
| 4580 | deliver_localpart_prefix = ftest_prefix; |
| 4581 | deliver_localpart_suffix = ftest_suffix; |
| 4582 | deliver_home = originator_home; |
| 4583 | |
| 4584 | if (return_path == NULL) |
| 4585 | { |
| 4586 | printf("Return-path copied from sender\n"); |
| 4587 | return_path = string_copy(sender_address); |
| 4588 | } |
| 4589 | else |
| 4590 | { |
| 4591 | printf("Return-path = %s\n", (return_path[0] == 0)? US"<>" : return_path); |
| 4592 | } |
| 4593 | printf("Sender = %s\n", (sender_address[0] == 0)? US"<>" : sender_address); |
| 4594 | |
| 4595 | receive_add_recipient( |
| 4596 | string_sprintf("%s%s%s@%s", |
| 4597 | (ftest_prefix == NULL)? US"" : ftest_prefix, |
| 4598 | deliver_localpart, |
| 4599 | (ftest_suffix == NULL)? US"" : ftest_suffix, |
| 4600 | deliver_domain), -1); |
| 4601 | |
| 4602 | printf("Recipient = %s\n", recipients_list[0].address); |
| 4603 | if (ftest_prefix != NULL) printf("Prefix = %s\n", ftest_prefix); |
| 4604 | if (ftest_suffix != NULL) printf("Suffix = %s\n", ftest_suffix); |
| 4605 | |
| 4606 | chdir("/"); /* Get away from wherever the user is running this from */ |
| 4607 | |
| 4608 | /* Now we run either a system filter test, or a user filter test, or both. |
| 4609 | In the latter case, headers added by the system filter will persist and be |
| 4610 | available to the user filter. We need to copy the filter variables |
| 4611 | explicitly. */ |
| 4612 | |
| 4613 | if ((filter_test & FTEST_SYSTEM) != 0) |
| 4614 | { |
| 4615 | if (!filter_runtest(filter_sfd, filter_test_sfile, TRUE, more)) |
| 4616 | exim_exit(EXIT_FAILURE); |
| 4617 | } |
| 4618 | |
| 4619 | memcpy(filter_sn, filter_n, sizeof(filter_sn)); |
| 4620 | |
| 4621 | if ((filter_test & FTEST_USER) != 0) |
| 4622 | { |
| 4623 | if (!filter_runtest(filter_ufd, filter_test_ufile, FALSE, more)) |
| 4624 | exim_exit(EXIT_FAILURE); |
| 4625 | } |
| 4626 | |
| 4627 | exim_exit(EXIT_SUCCESS); |
| 4628 | } |
| 4629 | |
| 4630 | /* Else act on the result of message reception. We should not get here unless |
| 4631 | message_id[0] is non-zero. If queue_only is set, local_queue_only will be |
| 4632 | TRUE. If it is not, check on the number of messages received in this |
| 4633 | connection. If that's OK and queue_only_load is set, check that the load |
| 4634 | average is below it. If it is not, set local_queue_only TRUE. Note that it |
| 4635 | then remains this way for any subsequent messages on the same SMTP connection. |
| 4636 | This is a deliberate choice; even though the load average may fall, it |
| 4637 | doesn't seem right to deliver later messages on the same call when not |
| 4638 | delivering earlier ones. */ |
| 4639 | |
| 4640 | if (!local_queue_only) |
| 4641 | { |
| 4642 | if (smtp_accept_queue_per_connection > 0 && |
| 4643 | receive_messagecount > smtp_accept_queue_per_connection) |
| 4644 | { |
| 4645 | local_queue_only = TRUE; |
| 4646 | queue_only_reason = 2; |
| 4647 | } |
| 4648 | else if (queue_only_load >= 0) |
| 4649 | { |
| 4650 | local_queue_only = (load_average = os_getloadavg()) > queue_only_load; |
| 4651 | if (local_queue_only) queue_only_reason = 3; |
| 4652 | } |
| 4653 | } |
| 4654 | |
| 4655 | /* If running as an MUA wrapper, all queueing options and freezing options |
| 4656 | are ignored. */ |
| 4657 | |
| 4658 | if (mua_wrapper) |
| 4659 | local_queue_only = queue_only_policy = deliver_freeze = FALSE; |
| 4660 | |
| 4661 | /* Log the queueing here, when it will get a message id attached, but |
| 4662 | not if queue_only is set (case 0). Case 1 doesn't happen here (too many |
| 4663 | connections). */ |
| 4664 | |
| 4665 | if (local_queue_only) switch(queue_only_reason) |
| 4666 | { |
| 4667 | case 2: |
| 4668 | log_write(L_delay_delivery, |
| 4669 | LOG_MAIN, "no immediate delivery: more than %d messages " |
| 4670 | "received in one connection", smtp_accept_queue_per_connection); |
| 4671 | break; |
| 4672 | |
| 4673 | case 3: |
| 4674 | log_write(L_delay_delivery, |
| 4675 | LOG_MAIN, "no immediate delivery: load average %.2f", |
| 4676 | (double)load_average/1000.0); |
| 4677 | break; |
| 4678 | } |
| 4679 | |
| 4680 | /* Else do the delivery unless the ACL or local_scan() called for queue only |
| 4681 | or froze the message. Always deliver in a separate process. A fork failure is |
| 4682 | not a disaster, as the delivery will eventually happen on a subsequent queue |
| 4683 | run. The search cache must be tidied before the fork, as the parent will |
| 4684 | do it before exiting. The child will trigger a lookup failure and |
| 4685 | thereby defer the delivery if it tries to use (for example) a cached ldap |
| 4686 | connection that the parent has called unbind on. */ |
| 4687 | |
| 4688 | else if (!queue_only_policy && !deliver_freeze) |
| 4689 | { |
| 4690 | pid_t pid; |
| 4691 | search_tidyup(); |
| 4692 | |
| 4693 | if ((pid = fork()) == 0) |
| 4694 | { |
| 4695 | int rc; |
| 4696 | close_unwanted(); /* Close unwanted file descriptors and TLS */ |
| 4697 | exim_nullstd(); /* Ensure std{in,out,err} exist */ |
| 4698 | |
| 4699 | /* Re-exec Exim if we need to regain privilege (note: in mua_wrapper |
| 4700 | mode, deliver_drop_privilege is forced TRUE). */ |
| 4701 | |
| 4702 | if (geteuid() != root_uid && !deliver_drop_privilege && !unprivileged) |
| 4703 | { |
| 4704 | (void)child_exec_exim(CEE_EXEC_EXIT, FALSE, NULL, FALSE, 2, US"-Mc", |
| 4705 | message_id); |
| 4706 | /* Control does not return here. */ |
| 4707 | } |
| 4708 | |
| 4709 | /* No need to re-exec */ |
| 4710 | |
| 4711 | rc = deliver_message(message_id, FALSE, FALSE); |
| 4712 | search_tidyup(); |
| 4713 | _exit((!mua_wrapper || rc == DELIVER_MUA_SUCCEEDED)? |
| 4714 | EXIT_SUCCESS : EXIT_FAILURE); |
| 4715 | } |
| 4716 | |
| 4717 | if (pid < 0) |
| 4718 | { |
| 4719 | log_write(0, LOG_MAIN|LOG_PANIC, "failed to fork automatic delivery " |
| 4720 | "process: %s", strerror(errno)); |
| 4721 | } |
| 4722 | |
| 4723 | /* In the parent, wait if synchronous delivery is required. This will |
| 4724 | always be the case in MUA wrapper mode. */ |
| 4725 | |
| 4726 | else if (synchronous_delivery) |
| 4727 | { |
| 4728 | int status; |
| 4729 | while (wait(&status) != pid); |
| 4730 | if ((status & 0x00ff) != 0) |
| 4731 | log_write(0, LOG_MAIN|LOG_PANIC, |
| 4732 | "process %d crashed with signal %d while delivering %s", |
| 4733 | (int)pid, status & 0x00ff, message_id); |
| 4734 | if (mua_wrapper && (status & 0xffff) != 0) exim_exit(EXIT_FAILURE); |
| 4735 | } |
| 4736 | } |
| 4737 | |
| 4738 | /* The loop will repeat if more is TRUE. If we do not know know that the OS |
| 4739 | automatically reaps children (see comments above the loop), clear away any |
| 4740 | finished subprocesses here, in case there are lots of messages coming in |
| 4741 | from the same source. */ |
| 4742 | |
| 4743 | #ifndef SIG_IGN_WORKS |
| 4744 | while (waitpid(-1, NULL, WNOHANG) > 0); |
| 4745 | #endif |
| 4746 | } |
| 4747 | |
| 4748 | exim_exit(EXIT_SUCCESS); /* Never returns */ |
| 4749 | return 0; /* To stop compiler warning */ |
| 4750 | } |
| 4751 | |
| 4752 | /* End of exim.c */ |