src/src/exim.c

   1 /* $Cambridge: exim/src/src/exim.c,v 1.63 2009/10/14 13:52:48 nm4 Exp $ */
   2
   3 /*************************************************
   4 *     Exim - an Internet mail transport agent    *
   5 *************************************************/
   6
   7 /* Copyright (c) University of Cambridge 1995 - 2007 */
   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 *   Call fopen() with umask 777 and adjust mode  *
 380 *************************************************/
 381
 382 /* Exim runs with umask(0) so that files created with open() have the mode that
 383 is specified in the open() call. However, there are some files, typically in
 384 the spool directory, that are created with fopen(). They end up world-writeable
 385 if no precautions are taken. Although the spool directory is not accessible to
 386 the world, this is an untidiness. So this is a wrapper function for fopen()
 387 that sorts out the mode of the created file.
 388
 389 Arguments:
 390    filename       the file name
 391    options        the fopen() options
 392    mode           the required mode
 393
 394 Returns:          the fopened FILE or NULL
 395 */
 396
 397 FILE *
 398 modefopen(uschar *filename, char *options, mode_t mode)
 399 {
 400 mode_t saved_umask = umask(0777);
 401 FILE *f = Ufopen(filename, options);
 402 (void)umask(saved_umask);
 403 if (f != NULL) (void)fchmod(fileno(f), mode);
 404 return f;
 405 }
 406
 407
 408
 409
 410 /*************************************************
 411 *   Ensure stdin, stdout, and stderr exist       *
 412 *************************************************/
 413
 414 /* Some operating systems grumble if an exec() happens without a standard
 415 input, output, and error (fds 0, 1, 2) being defined. The worry is that some
 416 file will be opened and will use these fd values, and then some other bit of
 417 code will assume, for example, that it can write error messages to stderr.
 418 This function ensures that fds 0, 1, and 2 are open if they do not already
 419 exist, by connecting them to /dev/null.
 420
 421 This function is also used to ensure that std{in,out,err} exist at all times,
 422 so that if any library that Exim calls tries to use them, it doesn't crash.
 423
 424 Arguments:  None
 425 Returns:    Nothing
 426 */
 427
 428 void
 429 exim_nullstd(void)
 430 {
 431 int i;
 432 int devnull = -1;
 433 struct stat statbuf;
 434 for (i = 0; i <= 2; i++)
 435   {
 436   if (fstat(i, &statbuf) < 0 && errno == EBADF)
 437     {
 438     if (devnull < 0) devnull = open("/dev/null", O_RDWR);
 439     if (devnull < 0) log_write(0, LOG_MAIN|LOG_PANIC_DIE, "%s",
 440       string_open_failed(errno, "/dev/null"));
 441     if (devnull != i) (void)dup2(devnull, i);
 442     }
 443   }
 444 if (devnull > 2) (void)close(devnull);
 445 }
 446
 447
 448
 449
 450 /*************************************************
 451 *   Close unwanted file descriptors for delivery *
 452 *************************************************/
 453
 454 /* This function is called from a new process that has been forked to deliver
 455 an incoming message, either directly, or using exec.
 456
 457 We want any smtp input streams to be closed in this new process. However, it
 458 has been observed that using fclose() here causes trouble. When reading in -bS
 459 input, duplicate copies of messages have been seen. The files will be sharing a
 460 file pointer with the parent process, and it seems that fclose() (at least on
 461 some systems - I saw this on Solaris 2.5.1) messes with that file pointer, at
 462 least sometimes. Hence we go for closing the underlying file descriptors.
 463
 464 If TLS is active, we want to shut down the TLS library, but without molesting
 465 the parent's SSL connection.
 466
 467 For delivery of a non-SMTP message, we want to close stdin and stdout (and
 468 stderr unless debugging) because the calling process might have set them up as
 469 pipes and be waiting for them to close before it waits for the submission
 470 process to terminate. If they aren't closed, they hold up the calling process
 471 until the initial delivery process finishes, which is not what we want.
 472
 473 Exception: We do want it for synchronous delivery!
 474
 475 And notwithstanding all the above, if D_resolver is set, implying resolver
 476 debugging, leave stdout open, because that's where the resolver writes its
 477 debugging output.
 478
 479 When we close stderr (which implies we've also closed stdout), we also get rid
 480 of any controlling terminal.
 481
 482 Arguments:   None
 483 Returns:     Nothing
 484 */
 485
 486 static void
 487 close_unwanted(void)
 488 {
 489 if (smtp_input)
 490   {
 491   #ifdef SUPPORT_TLS
 492   tls_close(FALSE);      /* Shut down the TLS library */
 493   #endif
 494   (void)close(fileno(smtp_in));
 495   (void)close(fileno(smtp_out));
 496   smtp_in = NULL;
 497   }
 498 else
 499   {
 500   (void)close(0);                                          /* stdin */
 501   if ((debug_selector & D_resolver) == 0) (void)close(1);  /* stdout */
 502   if (debug_selector == 0)                                 /* stderr */
 503     {
 504     if (!synchronous_delivery)
 505       {
 506       (void)close(2);
 507       log_stderr = NULL;
 508       }
 509     (void)setsid();
 510     }
 511   }
 512 }
 513
 514
 515
 516
 517 /*************************************************
 518 *          Set uid and gid                       *
 519 *************************************************/
 520
 521 /* This function sets a new uid and gid permanently, optionally calling
 522 initgroups() to set auxiliary groups. There are some special cases when running
 523 Exim in unprivileged modes. In these situations the effective uid will not be
 524 root; if we already have the right effective uid/gid, and don't need to
 525 initialize any groups, leave things as they are.
 526
 527 Arguments:
 528   uid        the uid
 529   gid        the gid
 530   igflag     TRUE if initgroups() wanted
 531   msg        text to use in debugging output and failure log
 532
 533 Returns:     nothing; bombs out on failure
 534 */
 535
 536 void
 537 exim_setugid(uid_t uid, gid_t gid, BOOL igflag, uschar *msg)
 538 {
 539 uid_t euid = geteuid();
 540 gid_t egid = getegid();
 541
 542 if (euid == root_uid || euid != uid || egid != gid || igflag)
 543   {
 544   /* At least one OS returns +1 for initgroups failure, so just check for
 545   non-zero. */
 546
 547   if (igflag)
 548     {
 549     struct passwd *pw = getpwuid(uid);
 550     if (pw != NULL)
 551       {
 552       if (initgroups(pw->pw_name, gid) != 0)
 553         log_write(0,LOG_MAIN|LOG_PANIC_DIE,"initgroups failed for uid=%ld: %s",
 554           (long int)uid, strerror(errno));
 555       }
 556     else log_write(0, LOG_MAIN|LOG_PANIC_DIE, "cannot run initgroups(): "
 557       "no passwd entry for uid=%ld", (long int)uid);
 558     }
 559
 560   if (setgid(gid) < 0 || setuid(uid) < 0)
 561     {
 562     log_write(0, LOG_MAIN|LOG_PANIC_DIE, "unable to set gid=%ld or uid=%ld "
 563       "(euid=%ld): %s", (long int)gid, (long int)uid, (long int)euid, msg);
 564     }
 565   }
 566
 567 /* Debugging output included uid/gid and all groups */
 568
 569 DEBUG(D_uid)
 570   {
 571   int group_count;
 572   gid_t group_list[NGROUPS_MAX];
 573   debug_printf("changed uid/gid: %s\n  uid=%ld gid=%ld pid=%ld\n", msg,
 574     (long int)geteuid(), (long int)getegid(), (long int)getpid());
 575   group_count = getgroups(NGROUPS_MAX, group_list);
 576   debug_printf("  auxiliary group list:");
 577   if (group_count > 0)
 578     {
 579     int i;
 580     for (i = 0; i < group_count; i++) debug_printf(" %d", (int)group_list[i]);
 581     }
 582   else debug_printf(" <none>");
 583   debug_printf("\n");
 584   }
 585 }
 586
 587
 588
 589
 590 /*************************************************
 591 *               Exit point                       *
 592 *************************************************/
 593
 594 /* Exim exits via this function so that it always clears up any open
 595 databases.
 596
 597 Arguments:
 598   rc         return code
 599
 600 Returns:     does not return
 601 */
 602
 603 void
 604 exim_exit(int rc)
 605 {
 606 search_tidyup();
 607 DEBUG(D_any)
 608   debug_printf(">>>>>>>>>>>>>>>> Exim pid=%d terminating with rc=%d "
 609     ">>>>>>>>>>>>>>>>\n", (int)getpid(), rc);
 610 exit(rc);
 611 }
 612
 613
 614
 615
 616 /*************************************************
 617 *         Extract port from host address         *
 618 *************************************************/
 619
 620 /* Called to extract the port from the values given to -oMa and -oMi.
 621 It also checks the syntax of the address, and terminates it before the
 622 port data when a port is extracted.
 623
 624 Argument:
 625   address   the address, with possible port on the end
 626
 627 Returns:    the port, or zero if there isn't one
 628             bombs out on a syntax error
 629 */
 630
 631 static int
 632 check_port(uschar *address)
 633 {
 634 int port = host_address_extract_port(address);
 635 if (string_is_ip_address(address, NULL) == 0)
 636   {
 637   fprintf(stderr, "exim abandoned: \"%s\" is not an IP address\n", address);
 638   exit(EXIT_FAILURE);
 639   }
 640 return port;
 641 }
 642
 643
 644
 645 /*************************************************
 646 *              Test/verify an address            *
 647 *************************************************/
 648
 649 /* This function is called by the -bv and -bt code. It extracts a working
 650 address from a full RFC 822 address. This isn't really necessary per se, but it
 651 has the effect of collapsing source routes.
 652
 653 Arguments:
 654   s            the address string
 655   flags        flag bits for verify_address()
 656   exit_value   to be set for failures
 657
 658 Returns:       nothing
 659 */
 660
 661 static void
 662 test_address(uschar *s, int flags, int *exit_value)
 663 {
 664 int start, end, domain;
 665 uschar *parse_error = NULL;
 666 uschar *address = parse_extract_address(s, &parse_error, &start, &end, &domain,
 667   FALSE);
 668 if (address == NULL)
 669   {
 670   fprintf(stdout, "syntax error: %s\n", parse_error);
 671   *exit_value = 2;
 672   }
 673 else
 674   {
 675   int rc = verify_address(deliver_make_addr(address,TRUE), stdout, flags, -1,
 676     -1, -1, NULL, NULL, NULL);
 677   if (rc == FAIL) *exit_value = 2;
 678     else if (rc == DEFER && *exit_value == 0) *exit_value = 1;
 679   }
 680 }
 681
 682
 683
 684 /*************************************************
 685 *         Decode bit settings for log/debug      *
 686 *************************************************/
 687
 688 /* This function decodes a string containing bit settings in the form of +name
 689 and/or -name sequences, and sets/unsets bits in a bit string accordingly. It
 690 also recognizes a numeric setting of the form =<number>, but this is not
 691 intended for user use. It's an easy way for Exim to pass the debug settings
 692 when it is re-exec'ed.
 693
 694 The log options are held in two unsigned ints (because there became too many
 695 for one). The top bit in the table means "put in 2nd selector". This does not
 696 yet apply to debug options, so the "=" facility sets only the first selector.
 697
 698 The "all" selector, which must be equal to 0xffffffff, is recognized specially.
 699 It sets all the bits in both selectors. However, there is a facility for then
 700 unsetting certain bits, because we want to turn off "memory" in the debug case.
 701
 702 A bad value for a debug setting is treated as an unknown option - error message
 703 to stderr and die. For log settings, which come from the configuration file,
 704 we write to the log on the way out...
 705
 706 Arguments:
 707   selector1      address of the first bit string
 708   selector2      address of the second bit string, or NULL
 709   notall1        bits to exclude from "all" for selector1
 710   notall2        bits to exclude from "all" for selector2
 711   string         the configured string
 712   options        the table of option names
 713   count          size of table
 714   which          "log" or "debug"
 715
 716 Returns:         nothing on success - bomb out on failure
 717 */
 718
 719 static void
 720 decode_bits(unsigned int *selector1, unsigned int *selector2, int notall1,
 721   int notall2, uschar *string, bit_table *options, int count, uschar *which)
 722 {
 723 uschar *errmsg;
 724 if (string == NULL) return;
 725
 726 if (*string == '=')
 727   {
 728   char *end;    /* Not uschar */
 729   *selector1 = strtoul(CS string+1, &end, 0);
 730   if (*end == 0) return;
 731   errmsg = string_sprintf("malformed numeric %s_selector setting: %s", which,
 732     string);
 733   goto ERROR_RETURN;
 734   }
 735
 736 /* Handle symbolic setting */
 737
 738 else for(;;)
 739   {
 740   BOOL adding;
 741   uschar *s;
 742   int len;
 743   bit_table *start, *end;
 744
 745   while (isspace(*string)) string++;
 746   if (*string == 0) return;
 747
 748   if (*string != '+' && *string != '-')
 749     {
 750     errmsg = string_sprintf("malformed %s_selector setting: "
 751       "+ or - expected but found \"%s\"", which, string);
 752     goto ERROR_RETURN;
 753     }
 754
 755   adding = *string++ == '+';
 756   s = string;
 757   while (isalnum(*string) || *string == '_') string++;
 758   len = string - s;
 759
 760   start = options;
 761   end = options + count;
 762
 763   while (start < end)
 764     {
 765     bit_table *middle = start + (end - start)/2;
 766     int c = Ustrncmp(s, middle->name, len);
 767     if (c == 0)
 768       {
 769       if (middle->name[len] != 0) c = -1; else
 770         {
 771         unsigned int bit = middle->bit;
 772         unsigned int *selector;
 773
 774         /* The value with all bits set means "force all bits in both selectors"
 775         in the case where two are being handled. However, the top bit in the
 776         second selector is never set. When setting, some bits can be excluded.
 777         */
 778
 779         if (bit == 0xffffffff)
 780           {
 781           if (adding)
 782             {
 783             *selector1 = 0xffffffff ^ notall1;
 784             if (selector2 != NULL) *selector2 = 0x7fffffff ^ notall2;
 785             }
 786           else
 787             {
 788             *selector1 = 0;
 789             if (selector2 != NULL) *selector2 = 0;
 790             }
 791           }
 792
 793         /* Otherwise, the 0x80000000 bit means "this value, without the top
 794         bit, belongs in the second selector". */
 795
 796         else
 797           {
 798           if ((bit & 0x80000000) != 0)
 799             {
 800             selector = selector2;
 801             bit &= 0x7fffffff;
 802             }
 803           else selector = selector1;
 804           if (adding) *selector |= bit; else *selector &= ~bit;
 805           }
 806         break;  /* Out of loop to match selector name */
 807         }
 808       }
 809     if (c < 0) end = middle; else start = middle + 1;
 810     }  /* Loop to match selector name */
 811
 812   if (start >= end)
 813     {
 814     errmsg = string_sprintf("unknown %s_selector setting: %c%.*s", which,
 815       adding? '+' : '-', len, s);
 816     goto ERROR_RETURN;
 817     }
 818   }    /* Loop for selector names */
 819
 820 /* Handle disasters */
 821
 822 ERROR_RETURN:
 823 if (Ustrcmp(which, "debug") == 0)
 824   {
 825   fprintf(stderr, "exim: %s\n", errmsg);
 826   exit(EXIT_FAILURE);
 827   }
 828 else log_write(0, LOG_CONFIG|LOG_PANIC_DIE, "%s", errmsg);
 829 }
 830
 831
 832
 833 /*************************************************
 834 *          Show supported features               *
 835 *************************************************/
 836
 837 /* This function is called for -bV and for -d to output the optional features
 838 of the current Exim binary.
 839
 840 Arguments:  a FILE for printing
 841 Returns:    nothing
 842 */
 843
 844 static void
 845 show_whats_supported(FILE *f)
 846 {
 847 #ifdef DB_VERSION_STRING
 848 fprintf(f, "Berkeley DB: %s\n", DB_VERSION_STRING);
 849 #elif defined(BTREEVERSION) && defined(HASHVERSION)
 850   #ifdef USE_DB
 851   fprintf(f, "Probably Berkeley DB version 1.8x (native mode)\n");
 852   #else
 853   fprintf(f, "Probably Berkeley DB version 1.8x (compatibility mode)\n");
 854   #endif
 855 #elif defined(_DBM_RDONLY) || defined(dbm_dirfno)
 856 fprintf(f, "Probably ndbm\n");
 857 #elif defined(USE_TDB)
 858 fprintf(f, "Using tdb\n");
 859 #else
 860   #ifdef USE_GDBM
 861   fprintf(f, "Probably GDBM (native mode)\n");
 862   #else
 863   fprintf(f, "Probably GDBM (compatibility mode)\n");
 864   #endif
 865 #endif
 866
 867 fprintf(f, "Support for:");
 868 #ifdef SUPPORT_CRYPTEQ
 869   fprintf(f, " crypteq");
 870 #endif
 871 #if HAVE_ICONV
 872   fprintf(f, " iconv()");
 873 #endif
 874 #if HAVE_IPV6
 875   fprintf(f, " IPv6");
 876 #endif
 877 #ifdef HAVE_SETCLASSRESOURCES
 878   fprintf(f, " use_setclassresources");
 879 #endif
 880 #ifdef SUPPORT_PAM
 881   fprintf(f, " PAM");
 882 #endif
 883 #ifdef EXIM_PERL
 884   fprintf(f, " Perl");
 885 #endif
 886 #ifdef EXPAND_DLFUNC
 887   fprintf(f, " Expand_dlfunc");
 888 #endif
 889 #ifdef USE_TCP_WRAPPERS
 890   fprintf(f, " TCPwrappers");
 891 #endif
 892 #ifdef SUPPORT_TLS
 893   #ifdef USE_GNUTLS
 894   fprintf(f, " GnuTLS");
 895   #else
 896   fprintf(f, " OpenSSL");
 897   #endif
 898 #endif
 899 #ifdef SUPPORT_TRANSLATE_IP_ADDRESS
 900   fprintf(f, " translate_ip_address");
 901 #endif
 902 #ifdef SUPPORT_MOVE_FROZEN_MESSAGES
 903   fprintf(f, " move_frozen_messages");
 904 #endif
 905 #ifdef WITH_CONTENT_SCAN
 906   fprintf(f, " Content_Scanning");
 907 #endif
 908 #ifndef DISABLE_DKIM
 909   fprintf(f, " DKIM");
 910 #endif
 911 #ifdef WITH_OLD_DEMIME
 912   fprintf(f, " Old_Demime");
 913 #endif
 914 #ifdef EXPERIMENTAL_SPF
 915   fprintf(f, " Experimental_SPF");
 916 #endif
 917 #ifdef EXPERIMENTAL_SRS
 918   fprintf(f, " Experimental_SRS");
 919 #endif
 920 #ifdef EXPERIMENTAL_BRIGHTMAIL
 921   fprintf(f, " Experimental_Brightmail");
 922 #endif
 923 #ifdef EXPERIMENTAL_DCC
 924   fprintf(f, " Experimental_DCC");
 925 #endif
 926 fprintf(f, "\n");
 927
 928 fprintf(f, "Lookups:");
 929 #ifdef LOOKUP_LSEARCH
 930   fprintf(f, " lsearch wildlsearch nwildlsearch iplsearch");
 931 #endif
 932 #ifdef LOOKUP_CDB
 933   fprintf(f, " cdb");
 934 #endif
 935 #ifdef LOOKUP_DBM
 936   fprintf(f, " dbm dbmnz");
 937 #endif
 938 #ifdef LOOKUP_DNSDB
 939   fprintf(f, " dnsdb");
 940 #endif
 941 #ifdef LOOKUP_DSEARCH
 942   fprintf(f, " dsearch");
 943 #endif
 944 #ifdef LOOKUP_IBASE
 945   fprintf(f, " ibase");
 946 #endif
 947 #ifdef LOOKUP_LDAP
 948   fprintf(f, " ldap ldapdn ldapm");
 949 #endif
 950 #ifdef LOOKUP_MYSQL
 951   fprintf(f, " mysql");
 952 #endif
 953 #ifdef LOOKUP_NIS
 954   fprintf(f, " nis nis0");
 955 #endif
 956 #ifdef LOOKUP_NISPLUS
 957   fprintf(f, " nisplus");
 958 #endif
 959 #ifdef LOOKUP_ORACLE
 960   fprintf(f, " oracle");
 961 #endif
 962 #ifdef LOOKUP_PASSWD
 963   fprintf(f, " passwd");
 964 #endif
 965 #ifdef LOOKUP_PGSQL
 966   fprintf(f, " pgsql");
 967 #endif
 968 #ifdef LOOKUP_SQLITE
 969   fprintf(f, " sqlite");
 970 #endif
 971 #ifdef LOOKUP_TESTDB
 972   fprintf(f, " testdb");
 973 #endif
 974 #ifdef LOOKUP_WHOSON
 975   fprintf(f, " whoson");
 976 #endif
 977 fprintf(f, "\n");
 978
 979 fprintf(f, "Authenticators:");
 980 #ifdef AUTH_CRAM_MD5
 981   fprintf(f, " cram_md5");
 982 #endif
 983 #ifdef AUTH_CYRUS_SASL
 984   fprintf(f, " cyrus_sasl");
 985 #endif
 986 #ifdef AUTH_DOVECOT
 987   fprintf(f, " dovecot");
 988 #endif
 989 #ifdef AUTH_PLAINTEXT
 990   fprintf(f, " plaintext");
 991 #endif
 992 #ifdef AUTH_SPA
 993   fprintf(f, " spa");
 994 #endif
 995 fprintf(f, "\n");
 996
 997 fprintf(f, "Routers:");
 998 #ifdef ROUTER_ACCEPT
 999   fprintf(f, " accept");
1000 #endif
1001 #ifdef ROUTER_DNSLOOKUP
1002   fprintf(f, " dnslookup");
1003 #endif
1004 #ifdef ROUTER_IPLITERAL
1005   fprintf(f, " ipliteral");
1006 #endif
1007 #ifdef ROUTER_IPLOOKUP
1008   fprintf(f, " iplookup");
1009 #endif
1010 #ifdef ROUTER_MANUALROUTE
1011   fprintf(f, " manualroute");
1012 #endif
1013 #ifdef ROUTER_QUERYPROGRAM
1014   fprintf(f, " queryprogram");
1015 #endif
1016 #ifdef ROUTER_REDIRECT
1017   fprintf(f, " redirect");
1018 #endif
1019 fprintf(f, "\n");
1020
1021 fprintf(f, "Transports:");
1022 #ifdef TRANSPORT_APPENDFILE
1023   fprintf(f, " appendfile");
1024   #ifdef SUPPORT_MAILDIR
1025     fprintf(f, "/maildir");
1026   #endif
1027   #ifdef SUPPORT_MAILSTORE
1028     fprintf(f, "/mailstore");
1029   #endif
1030   #ifdef SUPPORT_MBX
1031     fprintf(f, "/mbx");
1032   #endif
1033 #endif
1034 #ifdef TRANSPORT_AUTOREPLY
1035   fprintf(f, " autoreply");
1036 #endif
1037 #ifdef TRANSPORT_LMTP
1038   fprintf(f, " lmtp");
1039 #endif
1040 #ifdef TRANSPORT_PIPE
1041   fprintf(f, " pipe");
1042 #endif
1043 #ifdef TRANSPORT_SMTP
1044   fprintf(f, " smtp");
1045 #endif
1046 fprintf(f, "\n");
1047
1048 if (fixed_never_users[0] > 0)
1049   {
1050   int i;
1051   fprintf(f, "Fixed never_users: ");
1052   for (i = 1; i <= (int)fixed_never_users[0] - 1; i++)
1053     fprintf(f, "%d:", (unsigned int)fixed_never_users[i]);
1054   fprintf(f, "%d\n", (unsigned int)fixed_never_users[i]);
1055   }
1056
1057 fprintf(f, "Size of off_t: %d\n", sizeof(off_t));
1058
1059 /* This runtime check is to help diagnose library linkage mismatches which
1060 result in segfaults and the like; as such, it's left until the end,
1061 just in case.  There will still be a "Configuration file is" line still to
1062 come. */
1063 #ifdef SUPPORT_TLS
1064 tls_version_report(f);
1065 #endif
1066 }
1067
1068
1069
1070
1071 /*************************************************
1072 *               Quote a local part               *
1073 *************************************************/
1074
1075 /* This function is used when a sender address or a From: or Sender: header
1076 line is being created from the caller's login, or from an authenticated_id. It
1077 applies appropriate quoting rules for a local part.
1078
1079 Argument:    the local part
1080 Returns:     the local part, quoted if necessary
1081 */
1082
1083 uschar *
1084 local_part_quote(uschar *lpart)
1085 {
1086 BOOL needs_quote = FALSE;
1087 int size, ptr;
1088 uschar *yield;
1089 uschar *t;
1090
1091 for (t = lpart; !needs_quote && *t != 0; t++)
1092   {
1093   needs_quote = !isalnum(*t) && strchr("!#$%&'*+-/=?^_`{|}~", *t) == NULL &&
1094     (*t != '.' || t == lpart || t[1] == 0);
1095   }
1096
1097 if (!needs_quote) return lpart;
1098
1099 size = ptr = 0;
1100 yield = string_cat(NULL, &size, &ptr, US"\"", 1);
1101
1102 for (;;)
1103   {
1104   uschar *nq = US Ustrpbrk(lpart, "\\\"");
1105   if (nq == NULL)
1106     {
1107     yield = string_cat(yield, &size, &ptr, lpart, Ustrlen(lpart));
1108     break;
1109     }
1110   yield = string_cat(yield, &size, &ptr, lpart, nq - lpart);
1111   yield = string_cat(yield, &size, &ptr, US"\\", 1);
1112   yield = string_cat(yield, &size, &ptr, nq, 1);
1113   lpart = nq + 1;
1114   }
1115
1116 yield = string_cat(yield, &size, &ptr, US"\"", 1);
1117 yield[ptr] = 0;
1118 return yield;
1119 }
1120
1121
1122
1123 #ifdef USE_READLINE
1124 /*************************************************
1125 *         Load readline() functions              *
1126 *************************************************/
1127
1128 /* This function is called from testing executions that read data from stdin,
1129 but only when running as the calling user. Currently, only -be does this. The
1130 function loads the readline() function library and passes back the functions.
1131 On some systems, it needs the curses library, so load that too, but try without
1132 it if loading fails. All this functionality has to be requested at build time.
1133
1134 Arguments:
1135   fn_readline_ptr   pointer to where to put the readline pointer
1136   fn_addhist_ptr    pointer to where to put the addhistory function
1137
1138 Returns:            the dlopen handle or NULL on failure
1139 */
1140
1141 static void *
1142 set_readline(char * (**fn_readline_ptr)(char *),
1143              char * (**fn_addhist_ptr)(char *))
1144 {
1145 void *dlhandle;
1146 void *dlhandle_curses = dlopen("libcurses.so", RTLD_GLOBAL|RTLD_LAZY);
1147
1148 dlhandle = dlopen("libreadline.so", RTLD_GLOBAL|RTLD_NOW);
1149 if (dlhandle_curses != NULL) dlclose(dlhandle_curses);
1150
1151 if (dlhandle != NULL)
1152   {
1153   *fn_readline_ptr = (char *(*)(char*))dlsym(dlhandle, "readline");
1154   *fn_addhist_ptr = (char *(*)(char*))dlsym(dlhandle, "add_history");
1155   }
1156 else
1157   {
1158   DEBUG(D_any) debug_printf("failed to load readline: %s\n", dlerror());
1159   }
1160
1161 return dlhandle;
1162 }
1163 #endif
1164
1165
1166
1167 /*************************************************
1168 *    Get a line from stdin for testing things    *
1169 *************************************************/
1170
1171 /* This function is called when running tests that can take a number of lines
1172 of input (for example, -be and -bt). It handles continuations and trailing
1173 spaces. And prompting and a blank line output on eof. If readline() is in use,
1174 the arguments are non-NULL and provide the relevant functions.
1175
1176 Arguments:
1177   fn_readline   readline function or NULL
1178   fn_addhist    addhist function or NULL
1179
1180 Returns:        pointer to dynamic memory, or NULL at end of file
1181 */
1182
1183 static uschar *
1184 get_stdinput(char *(*fn_readline)(char *), char *(*fn_addhist)(char *))
1185 {
1186 int i;
1187 int size = 0;
1188 int ptr = 0;
1189 uschar *yield = NULL;
1190
1191 if (fn_readline == NULL) { printf("> "); fflush(stdout); }
1192
1193 for (i = 0;; i++)
1194   {
1195   uschar buffer[1024];
1196   uschar *p, *ss;
1197
1198   #ifdef USE_READLINE
1199   char *readline_line = NULL;
1200   if (fn_readline != NULL)
1201     {
1202     if ((readline_line = fn_readline((i > 0)? "":"> ")) == NULL) break;
1203     if (*readline_line != 0 && fn_addhist != NULL) fn_addhist(readline_line);
1204     p = US readline_line;
1205     }
1206   else
1207   #endif
1208
1209   /* readline() not in use */
1210
1211     {
1212     if (Ufgets(buffer, sizeof(buffer), stdin) == NULL) break;
1213     p = buffer;
1214     }
1215
1216   /* Handle the line */
1217
1218   ss = p + (int)Ustrlen(p);
1219   while (ss > p && isspace(ss[-1])) ss--;
1220
1221   if (i > 0)
1222     {
1223     while (p < ss && isspace(*p)) p++;   /* leading space after cont */
1224     }
1225
1226   yield = string_cat(yield, &size, &ptr, p, ss - p);
1227
1228   #ifdef USE_READLINE
1229   if (fn_readline != NULL) free(readline_line);
1230   #endif
1231
1232   if (ss == p || yield[ptr-1] != '\\')
1233     {
1234     yield[ptr] = 0;
1235     break;
1236     }
1237   yield[--ptr] = 0;
1238   }
1239
1240 if (yield == NULL) printf("\n");
1241 return yield;
1242 }
1243
1244
1245
1246 /*************************************************
1247 *    Output usage information for the program    *
1248 *************************************************/
1249
1250 /* This function is called when there are no recipients
1251    or a specific --help argument was added.
1252
1253 Arguments:
1254   progname      information on what name we were called by
1255
1256 Returns:        DOES NOT RETURN
1257 */
1258
1259 static void
1260 exim_usage(uschar *progname)
1261 {
1262
1263 /* Handle specific program invocation varients */
1264 if (Ustrcmp(progname, US"-mailq") == 0)
1265   {
1266   fprintf(stderr,
1267     "mailq - list the contents of the mail queue\n\n"
1268     "For a list of options, see the Exim documentation.\n");
1269   exit(EXIT_FAILURE);
1270   }
1271
1272 /* Generic usage - we output this whatever happens */
1273 fprintf(stderr,
1274   "Exim is a Mail Transfer Agent. It is normally called by Mail User Agents,\n"
1275   "not directly from a shell command line. Options and/or arguments control\n"
1276   "what it does when called. For a list of options, see the Exim documentation.\n");
1277
1278 exit(EXIT_FAILURE);
1279 }
1280
1281
1282
1283 /*************************************************
1284 *          Entry point and high-level code       *
1285 *************************************************/
1286
1287 /* Entry point for the Exim mailer. Analyse the arguments and arrange to take
1288 the appropriate action. All the necessary functions are present in the one
1289 binary. I originally thought one should split it up, but it turns out that so
1290 much of the apparatus is needed in each chunk that one might as well just have
1291 it all available all the time, which then makes the coding easier as well.
1292
1293 Arguments:
1294   argc      count of entries in argv
1295   argv      argument strings, with argv[0] being the program name
1296
1297 Returns:    EXIT_SUCCESS if terminated successfully
1298             EXIT_FAILURE otherwise, except when a message has been sent
1299               to the sender, and -oee was given
1300 */
1301
1302 int
1303 main(int argc, char **cargv)
1304 {
1305 uschar **argv = USS cargv;
1306 int  arg_receive_timeout = -1;
1307 int  arg_smtp_receive_timeout = -1;
1308 int  arg_error_handling = error_handling;
1309 int  filter_sfd = -1;
1310 int  filter_ufd = -1;
1311 int  group_count;
1312 int  i;
1313 int  list_queue_option = 0;
1314 int  msg_action = 0;
1315 int  msg_action_arg = -1;
1316 int  namelen = (argv[0] == NULL)? 0 : Ustrlen(argv[0]);
1317 int  queue_only_reason = 0;
1318 #ifdef EXIM_PERL
1319 int  perl_start_option = 0;
1320 #endif
1321 int  recipients_arg = argc;
1322 int  sender_address_domain = 0;
1323 int  test_retry_arg = -1;
1324 int  test_rewrite_arg = -1;
1325 BOOL arg_queue_only = FALSE;
1326 BOOL bi_option = FALSE;
1327 BOOL checking = FALSE;
1328 BOOL count_queue = FALSE;
1329 BOOL expansion_test = FALSE;
1330 BOOL extract_recipients = FALSE;
1331 BOOL forced_delivery = FALSE;
1332 BOOL f_end_dot = FALSE;
1333 BOOL deliver_give_up = FALSE;
1334 BOOL list_queue = FALSE;
1335 BOOL list_options = FALSE;
1336 BOOL local_queue_only;
1337 BOOL more = TRUE;
1338 BOOL one_msg_action = FALSE;
1339 BOOL queue_only_set = FALSE;
1340 BOOL receiving_message = TRUE;
1341 BOOL sender_ident_set = FALSE;
1342 BOOL session_local_queue_only;
1343 BOOL unprivileged;
1344 BOOL removed_privilege = FALSE;
1345 BOOL usage_wanted = FALSE;
1346 BOOL verify_address_mode = FALSE;
1347 BOOL verify_as_sender = FALSE;
1348 BOOL version_printed = FALSE;
1349 uschar *alias_arg = NULL;
1350 uschar *called_as = US"";
1351 uschar *start_queue_run_id = NULL;
1352 uschar *stop_queue_run_id = NULL;
1353 uschar *expansion_test_message = NULL;
1354 uschar *ftest_domain = NULL;
1355 uschar *ftest_localpart = NULL;
1356 uschar *ftest_prefix = NULL;
1357 uschar *ftest_suffix = NULL;
1358 uschar *real_sender_address;
1359 uschar *originator_home = US"/";
1360 void *reset_point;
1361
1362 struct passwd *pw;
1363 struct stat statbuf;
1364 pid_t passed_qr_pid = (pid_t)0;
1365 int passed_qr_pipe = -1;
1366 gid_t group_list[NGROUPS_MAX];
1367
1368 /* Possible options for -R and -S */
1369
1370 static uschar *rsopts[] = { US"f", US"ff", US"r", US"rf", US"rff" };
1371
1372 /* Need to define this in case we need to change the environment in order
1373 to get rid of a bogus time zone. We have to make it char rather than uschar
1374 because some OS define it in /usr/include/unistd.h. */
1375
1376 extern char **environ;
1377
1378 /* If the Exim user and/or group and/or the configuration file owner/group were
1379 defined by ref:name at build time, we must now find the actual uid/gid values.
1380 This is a feature to make the lives of binary distributors easier. */
1381
1382 #ifdef EXIM_USERNAME
1383 if (route_finduser(US EXIM_USERNAME, &pw, &exim_uid))
1384   {
1385   exim_gid = pw->pw_gid;
1386   }
1387 else
1388   {
1389   fprintf(stderr, "exim: failed to find uid for user name \"%s\"\n",
1390     EXIM_USERNAME);
1391   exit(EXIT_FAILURE);
1392   }
1393 #endif
1394
1395 #ifdef EXIM_GROUPNAME
1396 if (!route_findgroup(US EXIM_GROUPNAME, &exim_gid))
1397   {
1398   fprintf(stderr, "exim: failed to find gid for group name \"%s\"\n",
1399     EXIM_GROUPNAME);
1400   exit(EXIT_FAILURE);
1401   }
1402 #endif
1403
1404 #ifdef CONFIGURE_OWNERNAME
1405 if (!route_finduser(US CONFIGURE_OWNERNAME, NULL, &config_uid))
1406   {
1407   fprintf(stderr, "exim: failed to find uid for user name \"%s\"\n",
1408     CONFIGURE_OWNERNAME);
1409   exit(EXIT_FAILURE);
1410   }
1411 #endif
1412
1413 #ifdef CONFIGURE_GROUPNAME
1414 if (!route_findgroup(US CONFIGURE_GROUPNAME, &config_gid))
1415   {
1416   fprintf(stderr, "exim: failed to find gid for group name \"%s\"\n",
1417     CONFIGURE_GROUPNAME);
1418   exit(EXIT_FAILURE);
1419   }
1420 #endif
1421
1422 /* In the Cygwin environment, some initialization needs doing. It is fudged
1423 in by means of this macro. */
1424
1425 #ifdef OS_INIT
1426 OS_INIT
1427 #endif
1428
1429 /* Check a field which is patched when we are running Exim within its
1430 testing harness; do a fast initial check, and then the whole thing. */
1431
1432 running_in_test_harness =
1433   *running_status == '<' && Ustrcmp(running_status, "<<<testing>>>") == 0;
1434
1435 /* The C standard says that the equivalent of setlocale(LC_ALL, "C") is obeyed
1436 at the start of a program; however, it seems that some environments do not
1437 follow this. A "strange" locale can affect the formatting of timestamps, so we
1438 make quite sure. */
1439
1440 setlocale(LC_ALL, "C");
1441
1442 /* Set up the default handler for timing using alarm(). */
1443
1444 os_non_restarting_signal(SIGALRM, sigalrm_handler);
1445
1446 /* Ensure we have a buffer for constructing log entries. Use malloc directly,
1447 because store_malloc writes a log entry on failure. */
1448
1449 log_buffer = (uschar *)malloc(LOG_BUFFER_SIZE);
1450 if (log_buffer == NULL)
1451   {
1452   fprintf(stderr, "exim: failed to get store for log buffer\n");
1453   exit(EXIT_FAILURE);
1454   }
1455
1456 /* Set log_stderr to stderr, provided that stderr exists. This gets reset to
1457 NULL when the daemon is run and the file is closed. We have to use this
1458 indirection, because some systems don't allow writing to the variable "stderr".
1459 */
1460
1461 if (fstat(fileno(stderr), &statbuf) >= 0) log_stderr = stderr;
1462
1463 /* Arrange for the PCRE regex library to use our store functions. Note that
1464 the normal calls are actually macros that add additional arguments for
1465 debugging purposes so we have to assign specially constructed functions here.
1466 The default is to use store in the stacking pool, but this is overridden in the
1467 regex_must_compile() function. */
1468
1469 pcre_malloc = function_store_get;
1470 pcre_free = function_dummy_free;
1471
1472 /* Ensure there is a big buffer for temporary use in several places. It is put
1473 in malloc store so that it can be freed for enlargement if necessary. */
1474
1475 big_buffer = store_malloc(big_buffer_size);
1476
1477 /* Set up the handler for the data request signal, and set the initial
1478 descriptive text. */
1479
1480 set_process_info("initializing");
1481 os_restarting_signal(SIGUSR1, usr1_handler);
1482
1483 /* SIGHUP is used to get the daemon to reconfigure. It gets set as appropriate
1484 in the daemon code. For the rest of Exim's uses, we ignore it. */
1485
1486 signal(SIGHUP, SIG_IGN);
1487
1488 /* We don't want to die on pipe errors as the code is written to handle
1489 the write error instead. */
1490
1491 signal(SIGPIPE, SIG_IGN);
1492
1493 /* Under some circumstance on some OS, Exim can get called with SIGCHLD
1494 set to SIG_IGN. This causes subprocesses that complete before the parent
1495 process waits for them not to hang around, so when Exim calls wait(), nothing
1496 is there. The wait() code has been made robust against this, but let's ensure
1497 that SIGCHLD is set to SIG_DFL, because it's tidier to wait and get a process
1498 ending status. We use sigaction rather than plain signal() on those OS where
1499 SA_NOCLDWAIT exists, because we want to be sure it is turned off. (There was a
1500 problem on AIX with this.) */
1501
1502 #ifdef SA_NOCLDWAIT
1503   {
1504   struct sigaction act;
1505   act.sa_handler = SIG_DFL;
1506   sigemptyset(&(act.sa_mask));
1507   act.sa_flags = 0;
1508   sigaction(SIGCHLD, &act, NULL);
1509   }
1510 #else
1511 signal(SIGCHLD, SIG_DFL);
1512 #endif
1513
1514 /* Save the arguments for use if we re-exec exim as a daemon after receiving
1515 SIGHUP. */
1516
1517 sighup_argv = argv;
1518
1519 /* Set up the version number. Set up the leading 'E' for the external form of
1520 message ids, set the pointer to the internal form, and initialize it to
1521 indicate no message being processed. */
1522
1523 version_init();
1524 message_id_option[0] = '-';
1525 message_id_external = message_id_option + 1;
1526 message_id_external[0] = 'E';
1527 message_id = message_id_external + 1;
1528 message_id[0] = 0;
1529
1530 /* Set the umask to zero so that any files Exim creates using open() are
1531 created with the modes that it specifies. NOTE: Files created with fopen() have
1532 a problem, which was not recognized till rather late (February 2006). With this
1533 umask, such files will be world writeable. (They are all content scanning files
1534 in the spool directory, which isn't world-accessible, so this is not a
1535 disaster, but it's untidy.) I don't want to change this overall setting,
1536 however, because it will interact badly with the open() calls. Instead, there's
1537 now a function called modefopen() that fiddles with the umask while calling
1538 fopen(). */
1539
1540 (void)umask(0);
1541
1542 /* Precompile the regular expression for matching a message id. Keep this in
1543 step with the code that generates ids in the accept.c module. We need to do
1544 this here, because the -M options check their arguments for syntactic validity
1545 using mac_ismsgid, which uses this. */
1546
1547 regex_ismsgid =
1548   regex_must_compile(US"^(?:[^\\W_]{6}-){2}[^\\W_]{2}$", FALSE, TRUE);
1549
1550 /* Precompile the regular expression that is used for matching an SMTP error
1551 code, possibly extended, at the start of an error message. Note that the
1552 terminating whitespace character is included. */
1553
1554 regex_smtp_code =
1555   regex_must_compile(US"^\\d\\d\\d\\s(?:\\d\\.\\d\\d?\\d?\\.\\d\\d?\\d?\\s)?",
1556     FALSE, TRUE);
1557
1558 /* If the program is called as "mailq" treat it as equivalent to "exim -bp";
1559 this seems to be a generally accepted convention, since one finds symbolic
1560 links called "mailq" in standard OS configurations. */
1561
1562 if ((namelen == 5 && Ustrcmp(argv[0], "mailq") == 0) ||
1563     (namelen  > 5 && Ustrncmp(argv[0] + namelen - 6, "/mailq", 6) == 0))
1564   {
1565   list_queue = TRUE;
1566   receiving_message = FALSE;
1567   called_as = US"-mailq";
1568   }
1569
1570 /* If the program is called as "rmail" treat it as equivalent to
1571 "exim -i -oee", thus allowing UUCP messages to be input using non-SMTP mode,
1572 i.e. preventing a single dot on a line from terminating the message, and
1573 returning with zero return code, even in cases of error (provided an error
1574 message has been sent). */
1575
1576 if ((namelen == 5 && Ustrcmp(argv[0], "rmail") == 0) ||
1577     (namelen  > 5 && Ustrncmp(argv[0] + namelen - 6, "/rmail", 6) == 0))
1578   {
1579   dot_ends = FALSE;
1580   called_as = US"-rmail";
1581   errors_sender_rc = EXIT_SUCCESS;
1582   }
1583
1584 /* If the program is called as "rsmtp" treat it as equivalent to "exim -bS";
1585 this is a smail convention. */
1586
1587 if ((namelen == 5 && Ustrcmp(argv[0], "rsmtp") == 0) ||
1588     (namelen  > 5 && Ustrncmp(argv[0] + namelen - 6, "/rsmtp", 6) == 0))
1589   {
1590   smtp_input = smtp_batched_input = TRUE;
1591   called_as = US"-rsmtp";
1592   }
1593
1594 /* If the program is called as "runq" treat it as equivalent to "exim -q";
1595 this is a smail convention. */
1596
1597 if ((namelen == 4 && Ustrcmp(argv[0], "runq") == 0) ||
1598     (namelen  > 4 && Ustrncmp(argv[0] + namelen - 5, "/runq", 5) == 0))
1599   {
1600   queue_interval = 0;
1601   receiving_message = FALSE;
1602   called_as = US"-runq";
1603   }
1604
1605 /* If the program is called as "newaliases" treat it as equivalent to
1606 "exim -bi"; this is a sendmail convention. */
1607
1608 if ((namelen == 10 && Ustrcmp(argv[0], "newaliases") == 0) ||
1609     (namelen  > 10 && Ustrncmp(argv[0] + namelen - 11, "/newaliases", 11) == 0))
1610   {
1611   bi_option = TRUE;
1612   receiving_message = FALSE;
1613   called_as = US"-newaliases";
1614   }
1615
1616 /* Save the original effective uid for a couple of uses later. It should
1617 normally be root, but in some esoteric environments it may not be. */
1618
1619 original_euid = geteuid();
1620
1621 /* Get the real uid and gid. If the caller is root, force the effective uid/gid
1622 to be the same as the real ones. This makes a difference only if Exim is setuid
1623 (or setgid) to something other than root, which could be the case in some
1624 special configurations. */
1625
1626 real_uid = getuid();
1627 real_gid = getgid();
1628
1629 if (real_uid == root_uid)
1630   {
1631   setgid(real_gid);
1632   setuid(real_uid);
1633   }
1634
1635 /* If neither the original real uid nor the original euid was root, Exim is
1636 running in an unprivileged state. */
1637
1638 unprivileged = (real_uid != root_uid && original_euid != root_uid);
1639
1640 /* If the first argument is --help, set usage_wanted and pretend there
1641 are no arguments. This will cause a brief message to be given.   We do
1642 the message generation downstream so we can pick up how we were invoked */
1643
1644 if (argc > 1 && Ustrcmp(argv[1], "--help") == 0)
1645   {
1646   argc = 1;
1647   usage_wanted = TRUE;
1648   }
1649
1650 /* Scan the program's arguments. Some can be dealt with right away; others are
1651 simply recorded for checking and handling afterwards. Do a high-level switch
1652 on the second character (the one after '-'), to save some effort. */
1653
1654 for (i = 1; i < argc; i++)
1655   {
1656   BOOL badarg = FALSE;
1657   uschar *arg = argv[i];
1658   uschar *argrest;
1659   int switchchar;
1660
1661   /* An argument not starting with '-' is the start of a recipients list;
1662   break out of the options-scanning loop. */
1663
1664   if (arg[0] != '-')
1665     {
1666     recipients_arg = i;
1667     break;
1668     }
1669
1670   /* An option consistion of -- terminates the options */
1671
1672   if (Ustrcmp(arg, "--") == 0)
1673     {
1674     recipients_arg = i + 1;
1675     break;
1676     }
1677
1678   /* Handle flagged options */
1679
1680   switchchar = arg[1];
1681   argrest = arg+2;
1682
1683   /* Make all -ex options synonymous with -oex arguments, since that
1684   is assumed by various callers. Also make -qR options synonymous with -R
1685   options, as that seems to be required as well. Allow for -qqR too, and
1686   the same for -S options. */
1687
1688   if (Ustrncmp(arg+1, "oe", 2) == 0 ||
1689       Ustrncmp(arg+1, "qR", 2) == 0 ||
1690       Ustrncmp(arg+1, "qS", 2) == 0)
1691     {
1692     switchchar = arg[2];
1693     argrest++;
1694     }
1695   else if (Ustrncmp(arg+1, "qqR", 3) == 0 || Ustrncmp(arg+1, "qqS", 3) == 0)
1696     {
1697     switchchar = arg[3];
1698     argrest += 2;
1699     queue_2stage = TRUE;
1700     }
1701
1702   /* Make -r synonymous with -f, since it is a documented alias */
1703
1704   else if (arg[1] == 'r') switchchar = 'f';
1705
1706   /* Make -ov synonymous with -v */
1707
1708   else if (Ustrcmp(arg, "-ov") == 0)
1709     {
1710     switchchar = 'v';
1711     argrest++;
1712     }
1713
1714   /* High-level switch on active initial letter */
1715
1716   switch(switchchar)
1717     {
1718     /* -Btype is a sendmail option for 7bit/8bit setting. Exim is 8-bit clean
1719     so has no need of it. */
1720
1721     case 'B':
1722     if (*argrest == 0) i++;       /* Skip over the type */
1723     break;
1724
1725
1726     case 'b':
1727     receiving_message = FALSE;    /* Reset TRUE for -bm, -bS, -bs below */
1728
1729     /* -bd:  Run in daemon mode, awaiting SMTP connections.
1730        -bdf: Ditto, but in the foreground.
1731     */
1732
1733     if (*argrest == 'd')
1734       {
1735       daemon_listen = TRUE;
1736       if (*(++argrest) == 'f') background_daemon = FALSE;
1737         else if (*argrest != 0) { badarg = TRUE; break; }
1738       }
1739
1740     /* -be:  Run in expansion test mode
1741        -bem: Ditto, but read a message from a file first
1742     */
1743
1744     else if (*argrest == 'e')
1745       {
1746       expansion_test = checking = TRUE;
1747       if (argrest[1] == 'm')
1748         {
1749         if (++i >= argc) { badarg = TRUE; break; }
1750         expansion_test_message = argv[i];
1751         argrest++;
1752         }
1753       if (argrest[1] != 0) { badarg = TRUE; break; }
1754       }
1755
1756     /* -bF:  Run system filter test */
1757
1758     else if (*argrest == 'F')
1759       {
1760       filter_test |= FTEST_SYSTEM;
1761       if (*(++argrest) != 0) { badarg = TRUE; break; }
1762       if (++i < argc) filter_test_sfile = argv[i]; else
1763         {
1764         fprintf(stderr, "exim: file name expected after %s\n", argv[i-1]);
1765         exit(EXIT_FAILURE);
1766         }
1767       }
1768
1769     /* -bf:  Run user filter test
1770        -bfd: Set domain for filter testing
1771        -bfl: Set local part for filter testing
1772        -bfp: Set prefix for filter testing
1773        -bfs: Set suffix for filter testing
1774     */
1775
1776     else if (*argrest == 'f')
1777       {
1778       if (*(++argrest) == 0)
1779         {
1780         filter_test |= FTEST_USER;
1781         if (++i < argc) filter_test_ufile = argv[i]; else
1782           {
1783           fprintf(stderr, "exim: file name expected after %s\n", argv[i-1]);
1784           exit(EXIT_FAILURE);
1785           }
1786         }
1787       else
1788         {
1789         if (++i >= argc)
1790           {
1791           fprintf(stderr, "exim: string expected after %s\n", arg);
1792           exit(EXIT_FAILURE);
1793           }
1794         if (Ustrcmp(argrest, "d") == 0) ftest_domain = argv[i];
1795         else if (Ustrcmp(argrest, "l") == 0) ftest_localpart = argv[i];
1796         else if (Ustrcmp(argrest, "p") == 0) ftest_prefix = argv[i];
1797         else if (Ustrcmp(argrest, "s") == 0) ftest_suffix = argv[i];
1798         else { badarg = TRUE; break; }
1799         }
1800       }
1801
1802     /* -bh: Host checking - an IP address must follow. */
1803
1804     else if (Ustrcmp(argrest, "h") == 0 || Ustrcmp(argrest, "hc") == 0)
1805       {
1806       if (++i >= argc) { badarg = TRUE; break; }
1807       sender_host_address = argv[i];
1808       host_checking = checking = log_testing_mode = TRUE;
1809       host_checking_callout = argrest[1] == 'c';
1810       }
1811
1812     /* -bi: This option is used by sendmail to initialize *the* alias file,
1813     though it has the -oA option to specify a different file. Exim has no
1814     concept of *the* alias file, but since Sun's YP make script calls
1815     sendmail this way, some support must be provided. */
1816
1817     else if (Ustrcmp(argrest, "i") == 0) bi_option = TRUE;
1818
1819     /* -bm: Accept and deliver message - the default option. Reinstate
1820     receiving_message, which got turned off for all -b options. */
1821
1822     else if (Ustrcmp(argrest, "m") == 0) receiving_message = TRUE;
1823
1824     /* -bnq: For locally originating messages, do not qualify unqualified
1825     addresses. In the envelope, this causes errors; in header lines they
1826     just get left. */
1827
1828     else if (Ustrcmp(argrest, "nq") == 0)
1829       {
1830       allow_unqualified_sender = FALSE;
1831       allow_unqualified_recipient = FALSE;
1832       }
1833
1834     /* -bpxx: List the contents of the mail queue, in various forms. If
1835     the option is -bpc, just a queue count is needed. Otherwise, if the
1836     first letter after p is r, then order is random. */
1837
1838     else if (*argrest == 'p')
1839       {
1840       if (*(++argrest) == 'c')
1841         {
1842         count_queue = TRUE;
1843         if (*(++argrest) != 0) badarg = TRUE;
1844         break;
1845         }
1846
1847       if (*argrest == 'r')
1848         {
1849         list_queue_option = 8;
1850         argrest++;
1851         }
1852       else list_queue_option = 0;
1853
1854       list_queue = TRUE;
1855
1856       /* -bp: List the contents of the mail queue, top-level only */
1857
1858       if (*argrest == 0) {}
1859
1860       /* -bpu: List the contents of the mail queue, top-level undelivered */
1861
1862       else if (Ustrcmp(argrest, "u") == 0) list_queue_option += 1;
1863
1864       /* -bpa: List the contents of the mail queue, including all delivered */
1865
1866       else if (Ustrcmp(argrest, "a") == 0) list_queue_option += 2;
1867
1868       /* Unknown after -bp[r] */
1869
1870       else
1871         {
1872         badarg = TRUE;
1873         break;
1874         }
1875       }
1876
1877
1878     /* -bP: List the configuration variables given as the address list.
1879     Force -v, so configuration errors get displayed. */
1880
1881     else if (Ustrcmp(argrest, "P") == 0)
1882       {
1883       list_options = TRUE;
1884       debug_selector |= D_v;
1885       debug_file = stderr;
1886       }
1887
1888     /* -brt: Test retry configuration lookup */
1889
1890     else if (Ustrcmp(argrest, "rt") == 0)
1891       {
1892       test_retry_arg = i + 1;
1893       goto END_ARG;
1894       }
1895
1896     /* -brw: Test rewrite configuration */
1897
1898     else if (Ustrcmp(argrest, "rw") == 0)
1899       {
1900       test_rewrite_arg = i + 1;
1901       goto END_ARG;
1902       }
1903
1904     /* -bS: Read SMTP commands on standard input, but produce no replies -
1905     all errors are reported by sending messages. */
1906
1907     else if (Ustrcmp(argrest, "S") == 0)
1908       smtp_input = smtp_batched_input = receiving_message = TRUE;
1909
1910     /* -bs: Read SMTP commands on standard input and produce SMTP replies
1911     on standard output. */
1912
1913     else if (Ustrcmp(argrest, "s") == 0) smtp_input = receiving_message = TRUE;
1914
1915     /* -bt: address testing mode */
1916
1917     else if (Ustrcmp(argrest, "t") == 0)
1918       address_test_mode = checking = log_testing_mode = TRUE;
1919
1920     /* -bv: verify addresses */
1921
1922     else if (Ustrcmp(argrest, "v") == 0)
1923       verify_address_mode = checking = log_testing_mode = TRUE;
1924
1925     /* -bvs: verify sender addresses */
1926
1927     else if (Ustrcmp(argrest, "vs") == 0)
1928       {
1929       verify_address_mode = checking = log_testing_mode = TRUE;
1930       verify_as_sender = TRUE;
1931       }
1932
1933     /* -bV: Print version string and support details */
1934
1935     else if (Ustrcmp(argrest, "V") == 0)
1936       {
1937       printf("Exim version %s #%s built %s\n", version_string,
1938         version_cnumber, version_date);
1939       printf("%s\n", CS version_copyright);
1940       version_printed = TRUE;
1941       show_whats_supported(stdout);
1942       }
1943
1944     else badarg = TRUE;
1945     break;
1946
1947
1948     /* -C: change configuration file list; ignore if it isn't really
1949     a change! Enforce a prefix check if required. */
1950
1951     case 'C':
1952     if (*argrest == 0)
1953       {
1954       if(++i < argc) argrest = argv[i]; else
1955         { badarg = TRUE; break; }
1956       }
1957     if (Ustrcmp(config_main_filelist, argrest) != 0)
1958       {
1959       #ifdef ALT_CONFIG_PREFIX
1960       int sep = 0;
1961       int len = Ustrlen(ALT_CONFIG_PREFIX);
1962       uschar *list = argrest;
1963       uschar *filename;
1964       while((filename = string_nextinlist(&list, &sep, big_buffer,
1965              big_buffer_size)) != NULL)
1966         {
1967         if ((Ustrlen(filename) < len ||
1968              Ustrncmp(filename, ALT_CONFIG_PREFIX, len) != 0 ||
1969              Ustrstr(filename, "/../") != NULL) &&
1970              (Ustrcmp(filename, "/dev/null") != 0 || real_uid != root_uid))
1971           {
1972           fprintf(stderr, "-C Permission denied\n");
1973           exit(EXIT_FAILURE);
1974           }
1975         }
1976       #endif
1977
1978       config_main_filelist = argrest;
1979       config_changed = TRUE;
1980       }
1981     break;
1982
1983
1984     /* -D: set up a macro definition */
1985
1986     case 'D':
1987     #ifdef DISABLE_D_OPTION
1988     fprintf(stderr, "exim: -D is not available in this Exim binary\n");
1989     exit(EXIT_FAILURE);
1990     #else
1991       {
1992       int ptr = 0;
1993       macro_item *mlast = NULL;
1994       macro_item *m;
1995       uschar name[24];
1996       uschar *s = argrest;
1997
1998       while (isspace(*s)) s++;
1999
2000       if (*s < 'A' || *s > 'Z')
2001         {
2002         fprintf(stderr, "exim: macro name set by -D must start with "
2003           "an upper case letter\n");
2004         exit(EXIT_FAILURE);
2005         }
2006
2007       while (isalnum(*s) || *s == '_')
2008         {
2009         if (ptr < sizeof(name)-1) name[ptr++] = *s;
2010         s++;
2011         }
2012       name[ptr] = 0;
2013       if (ptr == 0) { badarg = TRUE; break; }
2014       while (isspace(*s)) s++;
2015       if (*s != 0)
2016         {
2017         if (*s++ != '=') { badarg = TRUE; break; }
2018         while (isspace(*s)) s++;
2019         }
2020
2021       for (m = macros; m != NULL; m = m->next)
2022         {
2023         if (Ustrcmp(m->name, name) == 0)
2024           {
2025           fprintf(stderr, "exim: duplicated -D in command line\n");
2026           exit(EXIT_FAILURE);
2027           }
2028         mlast = m;
2029         }
2030
2031       m = store_get(sizeof(macro_item) + Ustrlen(name));
2032       m->next = NULL;
2033       m->command_line = TRUE;
2034       if (mlast == NULL) macros = m; else mlast->next = m;
2035       Ustrcpy(m->name, name);
2036       m->replacement = string_copy(s);
2037
2038       if (clmacro_count >= MAX_CLMACROS)
2039         {
2040         fprintf(stderr, "exim: too many -D options on command line\n");
2041         exit(EXIT_FAILURE);
2042         }
2043       clmacros[clmacro_count++] = string_sprintf("-D%s=%s", m->name,
2044         m->replacement);
2045       }
2046     #endif
2047     break;
2048
2049     /* -d: Set debug level (see also -v below) or set the drop_cr option.
2050     The latter is now a no-op, retained for compatibility only. If -dd is used,
2051     debugging subprocesses of the daemon is disabled. */
2052
2053     case 'd':
2054     if (Ustrcmp(argrest, "ropcr") == 0)
2055       {
2056       /* drop_cr = TRUE; */
2057       }
2058
2059     /* Use an intermediate variable so that we don't set debugging while
2060     decoding the debugging bits. */
2061
2062     else
2063       {
2064       unsigned int selector = D_default;
2065       debug_selector = 0;
2066       debug_file = NULL;
2067       if (*argrest == 'd')
2068         {
2069         debug_daemon = TRUE;
2070         argrest++;
2071         }
2072       if (*argrest != 0)
2073         decode_bits(&selector, NULL, D_memory, 0, argrest, debug_options,
2074           debug_options_count, US"debug");
2075       debug_selector = selector;
2076       }
2077     break;
2078
2079
2080     /* -E: This is a local error message. This option is not intended for
2081     external use at all, but is not restricted to trusted callers because it
2082     does no harm (just suppresses certain error messages) and if Exim is run
2083     not setuid root it won't always be trusted when it generates error
2084     messages using this option. If there is a message id following -E, point
2085     message_reference at it, for logging. */
2086
2087     case 'E':
2088     local_error_message = TRUE;
2089     if (mac_ismsgid(argrest)) message_reference = argrest;
2090     break;
2091
2092
2093     /* -ex: The vacation program calls sendmail with the undocumented "-eq"
2094     option, so it looks as if historically the -oex options are also callable
2095     without the leading -o. So we have to accept them. Before the switch,
2096     anything starting -oe has been converted to -e. Exim does not support all
2097     of the sendmail error options. */
2098
2099     case 'e':
2100     if (Ustrcmp(argrest, "e") == 0)
2101       {
2102       arg_error_handling = ERRORS_SENDER;
2103       errors_sender_rc = EXIT_SUCCESS;
2104       }
2105     else if (Ustrcmp(argrest, "m") == 0) arg_error_handling = ERRORS_SENDER;
2106     else if (Ustrcmp(argrest, "p") == 0) arg_error_handling = ERRORS_STDERR;
2107     else if (Ustrcmp(argrest, "q") == 0) arg_error_handling = ERRORS_STDERR;
2108     else if (Ustrcmp(argrest, "w") == 0) arg_error_handling = ERRORS_SENDER;
2109     else badarg = TRUE;
2110     break;
2111
2112
2113     /* -F: Set sender's full name, used instead of the gecos entry from
2114     the password file. Since users can usually alter their gecos entries,
2115     there's no security involved in using this instead. The data can follow
2116     the -F or be in the next argument. */
2117
2118     case 'F':
2119     if (*argrest == 0)
2120       {
2121       if(++i < argc) argrest = argv[i]; else
2122         { badarg = TRUE; break; }
2123       }
2124     originator_name = argrest;
2125     sender_name_forced = TRUE;
2126     break;
2127
2128
2129     /* -f: Set sender's address - this value is only actually used if Exim is
2130     run by a trusted user, or if untrusted_set_sender is set and matches the
2131     address, except that the null address can always be set by any user. The
2132     test for this happens later, when the value given here is ignored when not
2133     permitted. For an untrusted user, the actual sender is still put in Sender:
2134     if it doesn't match the From: header (unless no_local_from_check is set).
2135     The data can follow the -f or be in the next argument. The -r switch is an
2136     obsolete form of -f but since there appear to be programs out there that
2137     use anything that sendmail has ever supported, better accept it - the
2138     synonymizing is done before the switch above.
2139
2140     At this stage, we must allow domain literal addresses, because we don't
2141     know what the setting of allow_domain_literals is yet. Ditto for trailing
2142     dots and strip_trailing_dot. */
2143
2144     case 'f':
2145       {
2146       int start, end;
2147       uschar *errmess;
2148       if (*argrest == 0)
2149         {
2150         if (i+1 < argc) argrest = argv[++i]; else
2151           { badarg = TRUE; break; }
2152         }
2153       if (*argrest == 0)
2154         {
2155         sender_address = string_sprintf("");  /* Ensure writeable memory */
2156         }
2157       else
2158         {
2159         uschar *temp = argrest + Ustrlen(argrest) - 1;
2160         while (temp >= argrest && isspace(*temp)) temp--;
2161         if (temp >= argrest && *temp == '.') f_end_dot = TRUE;
2162         allow_domain_literals = TRUE;
2163         strip_trailing_dot = TRUE;
2164         sender_address = parse_extract_address(argrest, &errmess, &start, &end,
2165           &sender_address_domain, TRUE);
2166         allow_domain_literals = FALSE;
2167         strip_trailing_dot = FALSE;
2168         if (sender_address == NULL)
2169           {
2170           fprintf(stderr, "exim: bad -f address \"%s\": %s\n", argrest, errmess);
2171           return EXIT_FAILURE;
2172           }
2173         }
2174       sender_address_forced = TRUE;
2175       }
2176     break;
2177
2178     /* This is some Sendmail thing which can be ignored */
2179
2180     case 'G':
2181     break;
2182
2183     /* -h: Set the hop count for an incoming message. Exim does not currently
2184     support this; it always computes it by counting the Received: headers.
2185     To put it in will require a change to the spool header file format. */
2186
2187     case 'h':
2188     if (*argrest == 0)
2189       {
2190       if(++i < argc) argrest = argv[i]; else
2191         { badarg = TRUE; break; }
2192       }
2193     if (!isdigit(*argrest)) badarg = TRUE;
2194     break;
2195
2196
2197     /* -i: Set flag so dot doesn't end non-SMTP input (same as -oi, seems
2198     not to be documented for sendmail but mailx (at least) uses it) */
2199
2200     case 'i':
2201     if (*argrest == 0) dot_ends = FALSE; else badarg = TRUE;
2202     break;
2203
2204
2205     case 'M':
2206     receiving_message = FALSE;
2207
2208     /* -MC:  continue delivery of another message via an existing open
2209     file descriptor. This option is used for an internal call by the
2210     smtp transport when there is a pending message waiting to go to an
2211     address to which it has got a connection. Five subsequent arguments are
2212     required: transport name, host name, IP address, sequence number, and
2213     message_id. Transports may decline to create new processes if the sequence
2214     number gets too big. The channel is stdin. This (-MC) must be the last
2215     argument. There's a subsequent check that the real-uid is privileged.
2216
2217     If we are running in the test harness. delay for a bit, to let the process
2218     that set this one up complete. This makes for repeatability of the logging,
2219     etc. output. */
2220
2221     if (Ustrcmp(argrest, "C") == 0)
2222       {
2223       union sockaddr_46 interface_sock;
2224       EXIM_SOCKLEN_T size = sizeof(interface_sock);
2225
2226       if (argc != i + 6)
2227         {
2228         fprintf(stderr, "exim: too many or too few arguments after -MC\n");
2229         return EXIT_FAILURE;
2230         }
2231
2232       if (msg_action_arg >= 0)
2233         {
2234         fprintf(stderr, "exim: incompatible arguments\n");
2235         return EXIT_FAILURE;
2236         }
2237
2238       continue_transport = argv[++i];
2239       continue_hostname = argv[++i];
2240       continue_host_address = argv[++i];
2241       continue_sequence = Uatoi(argv[++i]);
2242       msg_action = MSG_DELIVER;
2243       msg_action_arg = ++i;
2244       forced_delivery = TRUE;
2245       queue_run_pid = passed_qr_pid;
2246       queue_run_pipe = passed_qr_pipe;
2247
2248       if (!mac_ismsgid(argv[i]))
2249         {
2250         fprintf(stderr, "exim: malformed message id %s after -MC option\n",
2251           argv[i]);
2252         return EXIT_FAILURE;
2253         }
2254
2255       /* Set up $sending_ip_address and $sending_port */
2256
2257       if (getsockname(fileno(stdin), (struct sockaddr *)(&interface_sock),
2258           &size) == 0)
2259         sending_ip_address = host_ntoa(-1, &interface_sock, NULL,
2260           &sending_port);
2261       else
2262         {
2263         fprintf(stderr, "exim: getsockname() failed after -MC option: %s\n",
2264           strerror(errno));
2265         return EXIT_FAILURE;
2266         }
2267
2268       if (running_in_test_harness) millisleep(500);
2269       break;
2270       }
2271
2272     /* -MCA: set the smtp_authenticated flag; this is useful only when it
2273     precedes -MC (see above). The flag indicates that the host to which
2274     Exim is connected has accepted an AUTH sequence. */
2275
2276     else if (Ustrcmp(argrest, "CA") == 0)
2277       {
2278       smtp_authenticated = TRUE;
2279       break;
2280       }
2281
2282     /* -MCP: set the smtp_use_pipelining flag; this is useful only when
2283     it preceded -MC (see above) */
2284
2285     else if (Ustrcmp(argrest, "CP") == 0)
2286       {
2287       smtp_use_pipelining = TRUE;
2288       break;
2289       }
2290
2291     /* -MCQ: pass on the pid of the queue-running process that started
2292     this chain of deliveries and the fd of its synchronizing pipe; this
2293     is useful only when it precedes -MC (see above) */
2294
2295     else if (Ustrcmp(argrest, "CQ") == 0)
2296       {
2297       if(++i < argc) passed_qr_pid = (pid_t)(Uatol(argv[i]));
2298         else badarg = TRUE;
2299       if(++i < argc) passed_qr_pipe = (int)(Uatol(argv[i]));
2300         else badarg = TRUE;
2301       break;
2302       }
2303
2304     /* -MCS: set the smtp_use_size flag; this is useful only when it
2305     precedes -MC (see above) */
2306
2307     else if (Ustrcmp(argrest, "CS") == 0)
2308       {
2309       smtp_use_size = TRUE;
2310       break;
2311       }
2312
2313     /* -MCT: set the tls_offered flag; this is useful only when it
2314     precedes -MC (see above). The flag indicates that the host to which
2315     Exim is connected has offered TLS support. */
2316
2317     #ifdef SUPPORT_TLS
2318     else if (Ustrcmp(argrest, "CT") == 0)
2319       {
2320       tls_offered = TRUE;
2321       break;
2322       }
2323     #endif
2324
2325     /* -M[x]: various operations on the following list of message ids:
2326        -M    deliver the messages, ignoring next retry times and thawing
2327        -Mc   deliver the messages, checking next retry times, no thawing
2328        -Mf   freeze the messages
2329        -Mg   give up on the messages
2330        -Mt   thaw the messages
2331        -Mrm  remove the messages
2332     In the above cases, this must be the last option. There are also the
2333     following options which are followed by a single message id, and which
2334     act on that message. Some of them use the "recipient" addresses as well.
2335        -Mar  add recipient(s)
2336        -Mmad mark all recipients delivered
2337        -Mmd  mark recipients(s) delivered
2338        -Mes  edit sender
2339        -Mset load a message for use with -be
2340        -Mvb  show body
2341        -Mvc  show copy (of whole message, in RFC 2822 format)
2342        -Mvh  show header
2343        -Mvl  show log
2344     */
2345
2346     else if (*argrest == 0)
2347       {
2348       msg_action = MSG_DELIVER;
2349       forced_delivery = deliver_force_thaw = TRUE;
2350       }
2351     else if (Ustrcmp(argrest, "ar") == 0)
2352       {
2353       msg_action = MSG_ADD_RECIPIENT;
2354       one_msg_action = TRUE;
2355       }
2356     else if (Ustrcmp(argrest, "c") == 0)  msg_action = MSG_DELIVER;
2357     else if (Ustrcmp(argrest, "es") == 0)
2358       {
2359       msg_action = MSG_EDIT_SENDER;
2360       one_msg_action = TRUE;
2361       }
2362     else if (Ustrcmp(argrest, "f") == 0)  msg_action = MSG_FREEZE;
2363     else if (Ustrcmp(argrest, "g") == 0)
2364       {
2365       msg_action = MSG_DELIVER;
2366       deliver_give_up = TRUE;
2367       }
2368     else if (Ustrcmp(argrest, "mad") == 0)
2369       {
2370       msg_action = MSG_MARK_ALL_DELIVERED;
2371       }
2372     else if (Ustrcmp(argrest, "md") == 0)
2373       {
2374       msg_action = MSG_MARK_DELIVERED;
2375       one_msg_action = TRUE;
2376       }
2377     else if (Ustrcmp(argrest, "rm") == 0) msg_action = MSG_REMOVE;
2378     else if (Ustrcmp(argrest, "set") == 0)
2379       {
2380       msg_action = MSG_LOAD;
2381       one_msg_action = TRUE;
2382       }
2383     else if (Ustrcmp(argrest, "t") == 0)  msg_action = MSG_THAW;
2384     else if (Ustrcmp(argrest, "vb") == 0)
2385       {
2386       msg_action = MSG_SHOW_BODY;
2387       one_msg_action = TRUE;
2388       }
2389     else if (Ustrcmp(argrest, "vc") == 0)
2390       {
2391       msg_action = MSG_SHOW_COPY;
2392       one_msg_action = TRUE;
2393       }
2394     else if (Ustrcmp(argrest, "vh") == 0)
2395       {
2396       msg_action = MSG_SHOW_HEADER;
2397       one_msg_action = TRUE;
2398       }
2399     else if (Ustrcmp(argrest, "vl") == 0)
2400       {
2401       msg_action = MSG_SHOW_LOG;
2402       one_msg_action = TRUE;
2403       }
2404     else { badarg = TRUE; break; }
2405
2406     /* All the -Mxx options require at least one message id. */
2407
2408     msg_action_arg = i + 1;
2409     if (msg_action_arg >= argc)
2410       {
2411       fprintf(stderr, "exim: no message ids given after %s option\n", arg);
2412       return EXIT_FAILURE;
2413       }
2414
2415     /* Some require only message ids to follow */
2416
2417     if (!one_msg_action)
2418       {
2419       int j;
2420       for (j = msg_action_arg; j < argc; j++) if (!mac_ismsgid(argv[j]))
2421         {
2422         fprintf(stderr, "exim: malformed message id %s after %s option\n",
2423           argv[j], arg);
2424         return EXIT_FAILURE;
2425         }
2426       goto END_ARG;   /* Remaining args are ids */
2427       }
2428
2429     /* Others require only one message id, possibly followed by addresses,
2430     which will be handled as normal arguments. */
2431
2432     else
2433       {
2434       if (!mac_ismsgid(argv[msg_action_arg]))
2435         {
2436         fprintf(stderr, "exim: malformed message id %s after %s option\n",
2437           argv[msg_action_arg], arg);
2438         return EXIT_FAILURE;
2439         }
2440       i++;
2441       }
2442     break;
2443
2444
2445     /* Some programs seem to call the -om option without the leading o;
2446     for sendmail it askes for "me too". Exim always does this. */
2447
2448     case 'm':
2449     if (*argrest != 0) badarg = TRUE;
2450     break;
2451
2452
2453     /* -N: don't do delivery - a debugging option that stops transports doing
2454     their thing. It implies debugging at the D_v level. */
2455
2456     case 'N':
2457     if (*argrest == 0)
2458       {
2459       dont_deliver = TRUE;
2460       debug_selector |= D_v;
2461       debug_file = stderr;
2462       }
2463     else badarg = TRUE;
2464     break;
2465
2466
2467     /* -n: This means "don't alias" in sendmail, apparently. Just ignore
2468     it. */
2469
2470     case 'n':
2471     break;
2472
2473     /* -O: Just ignore it. In sendmail, apparently -O option=value means set
2474     option to the specified value. This form uses long names. We need to handle
2475     -O option=value and -Ooption=value. */
2476
2477     case 'O':
2478     if (*argrest == 0)
2479       {
2480       if (++i >= argc)
2481         {
2482         fprintf(stderr, "exim: string expected after -O\n");
2483         exit(EXIT_FAILURE);
2484         }
2485       }
2486     break;
2487
2488     case 'o':
2489
2490     /* -oA: Set an argument for the bi command (sendmail's "alternate alias
2491     file" option). */
2492
2493     if (*argrest == 'A')
2494       {
2495       alias_arg = argrest + 1;
2496       if (alias_arg[0] == 0)
2497         {
2498         if (i+1 < argc) alias_arg = argv[++i]; else
2499           {
2500           fprintf(stderr, "exim: string expected after -oA\n");
2501           exit(EXIT_FAILURE);
2502           }
2503         }
2504       }
2505
2506     /* -oB: Set a connection message max value for remote deliveries */
2507
2508     else if (*argrest == 'B')
2509       {
2510       uschar *p = argrest + 1;
2511       if (p[0] == 0)
2512         {
2513         if (i+1 < argc && isdigit((argv[i+1][0]))) p = argv[++i]; else
2514           {
2515           connection_max_messages = 1;
2516           p = NULL;
2517           }
2518         }
2519
2520       if (p != NULL)
2521         {
2522         if (!isdigit(*p))
2523           {
2524           fprintf(stderr, "exim: number expected after -oB\n");
2525           exit(EXIT_FAILURE);
2526           }
2527         connection_max_messages = Uatoi(p);
2528         }
2529       }
2530
2531     /* -odb: background delivery */
2532
2533     else if (Ustrcmp(argrest, "db") == 0)
2534       {
2535       synchronous_delivery = FALSE;
2536       arg_queue_only = FALSE;
2537       queue_only_set = TRUE;
2538       }
2539
2540     /* -odf: foreground delivery (smail-compatible option); same effect as
2541        -odi: interactive (synchronous) delivery (sendmail-compatible option)
2542     */
2543
2544     else if (Ustrcmp(argrest, "df") == 0 || Ustrcmp(argrest, "di") == 0)
2545       {
2546       synchronous_delivery = TRUE;
2547       arg_queue_only = FALSE;
2548       queue_only_set = TRUE;
2549       }
2550
2551     /* -odq: queue only */
2552
2553     else if (Ustrcmp(argrest, "dq") == 0)
2554       {
2555       synchronous_delivery = FALSE;
2556       arg_queue_only = TRUE;
2557       queue_only_set = TRUE;
2558       }
2559
2560     /* -odqs: queue SMTP only - do local deliveries and remote routing,
2561     but no remote delivery */
2562
2563     else if (Ustrcmp(argrest, "dqs") == 0)
2564       {
2565       queue_smtp = TRUE;
2566       arg_queue_only = FALSE;
2567       queue_only_set = TRUE;
2568       }
2569
2570     /* -oex: Sendmail error flags. As these are also accepted without the
2571     leading -o prefix, for compatibility with vacation and other callers,
2572     they are handled with -e above. */
2573
2574     /* -oi:     Set flag so dot doesn't end non-SMTP input (same as -i)
2575        -oitrue: Another sendmail syntax for the same */
2576
2577     else if (Ustrcmp(argrest, "i") == 0 ||
2578              Ustrcmp(argrest, "itrue") == 0)
2579       dot_ends = FALSE;
2580
2581     /* -oM*: Set various characteristics for an incoming message; actually
2582     acted on for trusted callers only. */
2583
2584     else if (*argrest == 'M')
2585       {
2586       if (i+1 >= argc)
2587         {
2588         fprintf(stderr, "exim: data expected after -o%s\n", argrest);
2589         exit(EXIT_FAILURE);
2590         }
2591
2592       /* -oMa: Set sender host address */
2593
2594       if (Ustrcmp(argrest, "Ma") == 0) sender_host_address = argv[++i];
2595
2596       /* -oMaa: Set authenticator name */
2597
2598       else if (Ustrcmp(argrest, "Maa") == 0)
2599         sender_host_authenticated = argv[++i];
2600
2601       /* -oMas: setting authenticated sender */
2602
2603       else if (Ustrcmp(argrest, "Mas") == 0) authenticated_sender = argv[++i];
2604
2605       /* -oMai: setting authenticated id */
2606
2607       else if (Ustrcmp(argrest, "Mai") == 0) authenticated_id = argv[++i];
2608
2609       /* -oMi: Set incoming interface address */
2610
2611       else if (Ustrcmp(argrest, "Mi") == 0) interface_address = argv[++i];
2612
2613       /* -oMr: Received protocol */
2614
2615       else if (Ustrcmp(argrest, "Mr") == 0) received_protocol = argv[++i];
2616
2617       /* -oMs: Set sender host name */
2618
2619       else if (Ustrcmp(argrest, "Ms") == 0) sender_host_name = argv[++i];
2620
2621       /* -oMt: Set sender ident */
2622
2623       else if (Ustrcmp(argrest, "Mt") == 0)
2624         {
2625         sender_ident_set = TRUE;
2626         sender_ident = argv[++i];
2627         }
2628
2629       /* Else a bad argument */
2630
2631       else
2632         {
2633         badarg = TRUE;
2634         break;
2635         }
2636       }
2637
2638     /* -om: Me-too flag for aliases. Exim always does this. Some programs
2639     seem to call this as -m (undocumented), so that is also accepted (see
2640     above). */
2641
2642     else if (Ustrcmp(argrest, "m") == 0) {}
2643
2644     /* -oo: An ancient flag for old-style addresses which still seems to
2645     crop up in some calls (see in SCO). */
2646
2647     else if (Ustrcmp(argrest, "o") == 0) {}
2648
2649     /* -oP <name>: set pid file path for daemon */
2650
2651     else if (Ustrcmp(argrest, "P") == 0)
2652       override_pid_file_path = argv[++i];
2653
2654     /* -or <n>: set timeout for non-SMTP acceptance
2655        -os <n>: set timeout for SMTP acceptance */
2656
2657     else if (*argrest == 'r' || *argrest == 's')
2658       {
2659       int *tp = (*argrest == 'r')?
2660         &arg_receive_timeout : &arg_smtp_receive_timeout;
2661       if (argrest[1] == 0)
2662         {
2663         if (i+1 < argc) *tp= readconf_readtime(argv[++i], 0, FALSE);
2664         }
2665       else *tp = readconf_readtime(argrest + 1, 0, FALSE);
2666       if (*tp < 0)
2667         {
2668         fprintf(stderr, "exim: bad time value %s: abandoned\n", argv[i]);
2669         exit(EXIT_FAILURE);
2670         }
2671       }
2672
2673     /* -oX <list>: Override local_interfaces and/or default daemon ports */
2674
2675     else if (Ustrcmp(argrest, "X") == 0)
2676       override_local_interfaces = argv[++i];
2677
2678     /* Unknown -o argument */
2679
2680     else badarg = TRUE;
2681     break;
2682
2683
2684     /* -ps: force Perl startup; -pd force delayed Perl startup */
2685
2686     case 'p':
2687     #ifdef EXIM_PERL
2688     if (*argrest == 's' && argrest[1] == 0)
2689       {
2690       perl_start_option = 1;
2691       break;
2692       }
2693     if (*argrest == 'd' && argrest[1] == 0)
2694       {
2695       perl_start_option = -1;
2696       break;
2697       }
2698     #endif
2699
2700     /* -panythingelse is taken as the Sendmail-compatible argument -prval:sval,
2701     which sets the host protocol and host name */
2702
2703     if (*argrest == 0)
2704       {
2705       if (i+1 < argc) argrest = argv[++i]; else
2706         { badarg = TRUE; break; }
2707       }
2708
2709     if (*argrest != 0)
2710       {
2711       uschar *hn = Ustrchr(argrest, ':');
2712       if (hn == NULL)
2713         {
2714         received_protocol = argrest;
2715         }
2716       else
2717         {
2718         received_protocol = string_copyn(argrest, hn - argrest);
2719         sender_host_name = hn + 1;
2720         }
2721       }
2722     break;
2723
2724
2725     case 'q':
2726     receiving_message = FALSE;
2727     if (queue_interval >= 0)
2728       {
2729       fprintf(stderr, "exim: -q specified more than once\n");
2730       exit(EXIT_FAILURE);
2731       }
2732
2733     /* -qq...: Do queue runs in a 2-stage manner */
2734
2735     if (*argrest == 'q')
2736       {
2737       queue_2stage = TRUE;
2738       argrest++;
2739       }
2740
2741     /* -qi...: Do only first (initial) deliveries */
2742
2743     if (*argrest == 'i')
2744       {
2745       queue_run_first_delivery = TRUE;
2746       argrest++;
2747       }
2748
2749     /* -qf...: Run the queue, forcing deliveries
2750        -qff..: Ditto, forcing thawing as well */
2751
2752     if (*argrest == 'f')
2753       {
2754       queue_run_force = TRUE;
2755       if (*(++argrest) == 'f')
2756         {
2757         deliver_force_thaw = TRUE;
2758         argrest++;
2759         }
2760       }
2761
2762     /* -q[f][f]l...: Run the queue only on local deliveries */
2763
2764     if (*argrest == 'l')
2765       {
2766       queue_run_local = TRUE;
2767       argrest++;
2768       }
2769
2770     /* -q[f][f][l]: Run the queue, optionally forced, optionally local only,
2771     optionally starting from a given message id. */
2772
2773     if (*argrest == 0 &&
2774         (i + 1 >= argc || argv[i+1][0] == '-' || mac_ismsgid(argv[i+1])))
2775       {
2776       queue_interval = 0;
2777       if (i+1 < argc && mac_ismsgid(argv[i+1]))
2778         start_queue_run_id = argv[++i];
2779       if (i+1 < argc && mac_ismsgid(argv[i+1]))
2780         stop_queue_run_id = argv[++i];
2781       }
2782
2783     /* -q[f][f][l]<n>: Run the queue at regular intervals, optionally forced,
2784     optionally local only. */
2785
2786     else
2787       {
2788       if (*argrest != 0)
2789         queue_interval = readconf_readtime(argrest, 0, FALSE);
2790       else
2791         queue_interval = readconf_readtime(argv[++i], 0, FALSE);
2792       if (queue_interval <= 0)
2793         {
2794         fprintf(stderr, "exim: bad time value %s: abandoned\n", argv[i]);
2795         exit(EXIT_FAILURE);
2796         }
2797       }
2798     break;
2799
2800
2801     case 'R':   /* Synonymous with -qR... */
2802     receiving_message = FALSE;
2803
2804     /* -Rf:   As -R (below) but force all deliveries,
2805        -Rff:  Ditto, but also thaw all frozen messages,
2806        -Rr:   String is regex
2807        -Rrf:  Regex and force
2808        -Rrff: Regex and force and thaw
2809
2810     in all cases provided there are no further characters in this
2811     argument. */
2812
2813     if (*argrest != 0)
2814       {
2815       int i;
2816       for (i = 0; i < sizeof(rsopts)/sizeof(uschar *); i++)
2817         {
2818         if (Ustrcmp(argrest, rsopts[i]) == 0)
2819           {
2820           if (i != 2) queue_run_force = TRUE;
2821           if (i >= 2) deliver_selectstring_regex = TRUE;
2822           if (i == 1 || i == 4) deliver_force_thaw = TRUE;
2823           argrest += Ustrlen(rsopts[i]);
2824           }
2825         }
2826       }
2827
2828     /* -R: Set string to match in addresses for forced queue run to
2829     pick out particular messages. */
2830
2831     if (*argrest == 0)
2832       {
2833       if (i+1 < argc) deliver_selectstring = argv[++i]; else
2834         {
2835         fprintf(stderr, "exim: string expected after -R\n");
2836         exit(EXIT_FAILURE);
2837         }
2838       }
2839     else deliver_selectstring = argrest;
2840     break;
2841
2842
2843     /* -r: an obsolete synonym for -f (see above) */
2844
2845
2846     /* -S: Like -R but works on sender. */
2847
2848     case 'S':   /* Synonymous with -qS... */
2849     receiving_message = FALSE;
2850
2851     /* -Sf:   As -S (below) but force all deliveries,
2852        -Sff:  Ditto, but also thaw all frozen messages,
2853        -Sr:   String is regex
2854        -Srf:  Regex and force
2855        -Srff: Regex and force and thaw
2856
2857     in all cases provided there are no further characters in this
2858     argument. */
2859
2860     if (*argrest != 0)
2861       {
2862       int i;
2863       for (i = 0; i < sizeof(rsopts)/sizeof(uschar *); i++)
2864         {
2865         if (Ustrcmp(argrest, rsopts[i]) == 0)
2866           {
2867           if (i != 2) queue_run_force = TRUE;
2868           if (i >= 2) deliver_selectstring_sender_regex = TRUE;
2869           if (i == 1 || i == 4) deliver_force_thaw = TRUE;
2870           argrest += Ustrlen(rsopts[i]);
2871           }
2872         }
2873       }
2874
2875     /* -S: Set string to match in addresses for forced queue run to
2876     pick out particular messages. */
2877
2878     if (*argrest == 0)
2879       {
2880       if (i+1 < argc) deliver_selectstring_sender = argv[++i]; else
2881         {
2882         fprintf(stderr, "exim: string expected after -S\n");
2883         exit(EXIT_FAILURE);
2884         }
2885       }
2886     else deliver_selectstring_sender = argrest;
2887     break;
2888
2889     /* -Tqt is an option that is exclusively for use by the testing suite.
2890     It is not recognized in other circumstances. It allows for the setting up
2891     of explicit "queue times" so that various warning/retry things can be
2892     tested. Otherwise variability of clock ticks etc. cause problems. */
2893
2894     case 'T':
2895     if (running_in_test_harness && Ustrcmp(argrest, "qt") == 0)
2896       fudged_queue_times = argv[++i];
2897     else badarg = TRUE;
2898     break;
2899
2900
2901     /* -t: Set flag to extract recipients from body of message. */
2902
2903     case 't':
2904     if (*argrest == 0) extract_recipients = TRUE;
2905
2906     /* -ti: Set flag to extract recipients from body of message, and also
2907     specify that dot does not end the message. */
2908
2909     else if (Ustrcmp(argrest, "i") == 0)
2910       {
2911       extract_recipients = TRUE;
2912       dot_ends = FALSE;
2913       }
2914
2915     /* -tls-on-connect: don't wait for STARTTLS (for old clients) */
2916
2917     #ifdef SUPPORT_TLS
2918     else if (Ustrcmp(argrest, "ls-on-connect") == 0) tls_on_connect = TRUE;
2919     #endif
2920
2921     else badarg = TRUE;
2922     break;
2923
2924
2925     /* -U: This means "initial user submission" in sendmail, apparently. The
2926     doc claims that in future sendmail may refuse syntactically invalid
2927     messages instead of fixing them. For the moment, we just ignore it. */
2928
2929     case 'U':
2930     break;
2931
2932
2933     /* -v: verify things - this is a very low-level debugging */
2934
2935     case 'v':
2936     if (*argrest == 0)
2937       {
2938       debug_selector |= D_v;
2939       debug_file = stderr;
2940       }
2941     else badarg = TRUE;
2942     break;
2943
2944
2945     /* -x: AIX uses this to indicate some fancy 8-bit character stuff:
2946
2947       The -x flag tells the sendmail command that mail from a local
2948       mail program has National Language Support (NLS) extended characters
2949       in the body of the mail item. The sendmail command can send mail with
2950       extended NLS characters across networks that normally corrupts these
2951       8-bit characters.
2952
2953     As Exim is 8-bit clean, it just ignores this flag. */
2954
2955     case 'x':
2956     if (*argrest != 0) badarg = TRUE;
2957     break;
2958
2959     /* All other initial characters are errors */
2960
2961     default:
2962     badarg = TRUE;
2963     break;
2964     }         /* End of high-level switch statement */
2965
2966   /* Failed to recognize the option, or syntax error */
2967
2968   if (badarg)
2969     {
2970     fprintf(stderr, "exim abandoned: unknown, malformed, or incomplete "
2971       "option %s\n", arg);
2972     exit(EXIT_FAILURE);
2973     }
2974   }
2975
2976
2977 /* If -R or -S have been specified without -q, assume a single queue run. */
2978
2979 if ((deliver_selectstring != NULL || deliver_selectstring_sender != NULL) &&
2980   queue_interval < 0) queue_interval = 0;
2981
2982
2983 END_ARG:
2984 /* If usage_wanted is set we call the usage function - which never returns */
2985 if (usage_wanted) exim_usage(called_as);
2986
2987 /* Arguments have been processed. Check for incompatibilities. */
2988 if ((
2989     (smtp_input || extract_recipients || recipients_arg < argc) &&
2990     (daemon_listen || queue_interval >= 0 || bi_option ||
2991       test_retry_arg >= 0 || test_rewrite_arg >= 0 ||
2992       filter_test != FTEST_NONE || (msg_action_arg > 0 && !one_msg_action))
2993     ) ||
2994     (
2995     msg_action_arg > 0 &&
2996     (daemon_listen || queue_interval >= 0 || list_options ||
2997       (checking && msg_action != MSG_LOAD) ||
2998       bi_option || test_retry_arg >= 0 || test_rewrite_arg >= 0)
2999     ) ||
3000     (
3001     (daemon_listen || queue_interval >= 0) &&
3002     (sender_address != NULL || list_options || list_queue || checking ||
3003       bi_option)
3004     ) ||
3005     (
3006     daemon_listen && queue_interval == 0
3007     ) ||
3008     (
3009     list_options &&
3010     (checking || smtp_input || extract_recipients ||
3011       filter_test != FTEST_NONE || bi_option)
3012     ) ||
3013     (
3014     verify_address_mode &&
3015     (address_test_mode || smtp_input || extract_recipients ||
3016       filter_test != FTEST_NONE || bi_option)
3017     ) ||
3018     (
3019     address_test_mode && (smtp_input || extract_recipients ||
3020       filter_test != FTEST_NONE || bi_option)
3021     ) ||
3022     (
3023     smtp_input && (sender_address != NULL || filter_test != FTEST_NONE ||
3024       extract_recipients)
3025     ) ||
3026     (
3027     deliver_selectstring != NULL && queue_interval < 0
3028     ) ||
3029     (
3030     msg_action == MSG_LOAD &&
3031       (!expansion_test || expansion_test_message != NULL)
3032     )
3033    )
3034   {
3035   fprintf(stderr, "exim: incompatible command-line options or arguments\n");
3036   exit(EXIT_FAILURE);
3037   }
3038
3039 /* If debugging is set up, set the file and the file descriptor to pass on to
3040 child processes. It should, of course, be 2 for stderr. Also, force the daemon
3041 to run in the foreground. */
3042
3043 if (debug_selector != 0)
3044   {
3045   debug_file = stderr;
3046   debug_fd = fileno(debug_file);
3047   background_daemon = FALSE;
3048   if (running_in_test_harness) millisleep(100);   /* lets caller finish */
3049   if (debug_selector != D_v)    /* -v only doesn't show this */
3050     {
3051     debug_printf("Exim version %s uid=%ld gid=%ld pid=%d D=%x\n",
3052       version_string, (long int)real_uid, (long int)real_gid, (int)getpid(),
3053       debug_selector);
3054     show_whats_supported(stderr);
3055     }
3056   }
3057
3058 /* When started with root privilege, ensure that the limits on the number of
3059 open files and the number of processes (where that is accessible) are
3060 sufficiently large, or are unset, in case Exim has been called from an
3061 environment where the limits are screwed down. Not all OS have the ability to
3062 change some of these limits. */
3063
3064 if (unprivileged)
3065   {
3066   DEBUG(D_any) debug_print_ids(US"Exim has no root privilege:");
3067   }
3068 else
3069   {
3070   struct rlimit rlp;
3071
3072   #ifdef RLIMIT_NOFILE
3073   if (getrlimit(RLIMIT_NOFILE, &rlp) < 0)
3074     {
3075     log_write(0, LOG_MAIN|LOG_PANIC, "getrlimit(RLIMIT_NOFILE) failed: %s",
3076       strerror(errno));
3077     rlp.rlim_cur = rlp.rlim_max = 0;
3078     }
3079
3080   /* I originally chose 1000 as a nice big number that was unlikely to
3081   be exceeded. It turns out that some older OS have a fixed upper limit of
3082   256. */
3083
3084   if (rlp.rlim_cur < 1000)
3085     {
3086     rlp.rlim_cur = rlp.rlim_max = 1000;
3087     if (setrlimit(RLIMIT_NOFILE, &rlp) < 0)
3088       {
3089       rlp.rlim_cur = rlp.rlim_max = 256;
3090       if (setrlimit(RLIMIT_NOFILE, &rlp) < 0)
3091         log_write(0, LOG_MAIN|LOG_PANIC, "setrlimit(RLIMIT_NOFILE) failed: %s",
3092           strerror(errno));
3093       }
3094     }
3095   #endif
3096
3097   #ifdef RLIMIT_NPROC
3098   if (getrlimit(RLIMIT_NPROC, &rlp) < 0)
3099     {
3100     log_write(0, LOG_MAIN|LOG_PANIC, "getrlimit(RLIMIT_NPROC) failed: %s",
3101       strerror(errno));
3102     rlp.rlim_cur = rlp.rlim_max = 0;
3103     }
3104
3105   #ifdef RLIM_INFINITY
3106   if (rlp.rlim_cur != RLIM_INFINITY && rlp.rlim_cur < 1000)
3107     {
3108     rlp.rlim_cur = rlp.rlim_max = RLIM_INFINITY;
3109   #else
3110   if (rlp.rlim_cur < 1000)
3111     {
3112     rlp.rlim_cur = rlp.rlim_max = 1000;
3113   #endif
3114     if (setrlimit(RLIMIT_NPROC, &rlp) < 0)
3115       log_write(0, LOG_MAIN|LOG_PANIC, "setrlimit(RLIMIT_NPROC) failed: %s",
3116         strerror(errno));
3117     }
3118   #endif
3119   }
3120
3121 /* Exim is normally entered as root (but some special configurations are
3122 possible that don't do this). However, it always spins off sub-processes that
3123 set their uid and gid as required for local delivery. We don't want to pass on
3124 any extra groups that root may belong to, so we want to get rid of them all at
3125 this point.
3126
3127 We need to obey setgroups() at this stage, before possibly giving up root
3128 privilege for a changed configuration file, but later on we might need to
3129 check on the additional groups for the admin user privilege - can't do that
3130 till after reading the config, which might specify the exim gid. Therefore,
3131 save the group list here first. */
3132
3133 group_count = getgroups(NGROUPS_MAX, group_list);
3134
3135 /* There is a fundamental difference in some BSD systems in the matter of
3136 groups. FreeBSD and BSDI are known to be different; NetBSD and OpenBSD are
3137 known not to be different. On the "different" systems there is a single group
3138 list, and the first entry in it is the current group. On all other versions of
3139 Unix there is a supplementary group list, which is in *addition* to the current
3140 group. Consequently, to get rid of all extraneous groups on a "standard" system
3141 you pass over 0 groups to setgroups(), while on a "different" system you pass
3142 over a single group - the current group, which is always the first group in the
3143 list. Calling setgroups() with zero groups on a "different" system results in
3144 an error return. The following code should cope with both types of system.
3145
3146 However, if this process isn't running as root, setgroups() can't be used
3147 since you have to be root to run it, even if throwing away groups. Not being
3148 root here happens only in some unusual configurations. We just ignore the
3149 error. */
3150
3151 if (setgroups(0, NULL) != 0)
3152   {
3153   if (setgroups(1, group_list) != 0 && !unprivileged)
3154     {
3155     fprintf(stderr, "exim: setgroups() failed: %s\n", strerror(errno));
3156     exit(EXIT_FAILURE);
3157     }
3158   }
3159
3160 /* If the configuration file name has been altered by an argument on the
3161 command line (either a new file name or a macro definition) and the caller is
3162 not root or the exim user, or if this is a filter testing run, remove any
3163 setuid privilege the program has, and run as the underlying user.
3164
3165 If ALT_CONFIG_ROOT_ONLY is defined, the exim user is locked out of this, which
3166 severely restricts the use of -C for some purposes.
3167
3168 Otherwise, set the real ids to the effective values (should be root unless run
3169 from inetd, which it can either be root or the exim uid, if one is configured).
3170
3171 There is a private mechanism for bypassing some of this, in order to make it
3172 possible to test lots of configurations automatically, without having either to
3173 recompile each time, or to patch in an actual configuration file name and other
3174 values (such as the path name). If running in the test harness, pretend that
3175 configuration file changes and macro definitions haven't happened. */
3176
3177 if ((                                            /* EITHER */
3178     (config_changed || macros != NULL) &&        /* Config changed, and */
3179     real_uid != root_uid &&                      /* Not root, and */
3180     #ifndef ALT_CONFIG_ROOT_ONLY                 /* (when not locked out) */
3181     real_uid != exim_uid &&                      /* Not exim, and */
3182     #endif
3183     !running_in_test_harness                     /* Not fudged */
3184     ) ||                                         /*   OR   */
3185     expansion_test                               /* expansion testing */
3186     ||                                           /*   OR   */
3187     filter_test != FTEST_NONE)                   /* Filter testing */
3188   {
3189   setgroups(group_count, group_list);
3190   exim_setugid(real_uid, real_gid, FALSE,
3191     US"-C, -D, -be or -bf forces real uid");
3192   removed_privilege = TRUE;
3193
3194   /* In the normal case when Exim is called like this, stderr is available
3195   and should be used for any logging information because attempts to write
3196   to the log will usually fail. To arrange this, we unset really_exim. However,
3197   if no stderr is available there is no point - we might as well have a go
3198   at the log (if it fails, syslog will be written). */
3199
3200   if (log_stderr != NULL) really_exim = FALSE;
3201   }
3202
3203 /* Privilege is to be retained for the moment. It may be dropped later,
3204 depending on the job that this Exim process has been asked to do. For now, set
3205 the real uid to the effective so that subsequent re-execs of Exim are done by a
3206 privileged user. */
3207
3208 else exim_setugid(geteuid(), getegid(), FALSE, US"forcing real = effective");
3209
3210 /* If testing a filter, open the file(s) now, before wasting time doing other
3211 setups and reading the message. */
3212
3213 if ((filter_test & FTEST_SYSTEM) != 0)
3214   {
3215   filter_sfd = Uopen(filter_test_sfile, O_RDONLY, 0);
3216   if (filter_sfd < 0)
3217     {
3218     fprintf(stderr, "exim: failed to open %s: %s\n", filter_test_sfile,
3219       strerror(errno));
3220     return EXIT_FAILURE;
3221     }
3222   }
3223
3224 if ((filter_test & FTEST_USER) != 0)
3225   {
3226   filter_ufd = Uopen(filter_test_ufile, O_RDONLY, 0);
3227   if (filter_ufd < 0)
3228     {
3229     fprintf(stderr, "exim: failed to open %s: %s\n", filter_test_ufile,
3230       strerror(errno));
3231     return EXIT_FAILURE;
3232     }
3233   }
3234
3235 /* Read the main runtime configuration data; this gives up if there
3236 is a failure. It leaves the configuration file open so that the subsequent
3237 configuration data for delivery can be read if needed. */
3238
3239 readconf_main();
3240
3241 /* Handle the decoding of logging options. */
3242
3243 decode_bits(&log_write_selector, &log_extra_selector, 0, 0, log_selector_string,
3244   log_options, log_options_count, US"log");
3245
3246 DEBUG(D_any)
3247   {
3248   debug_printf("configuration file is %s\n", config_main_filename);
3249   debug_printf("log selectors = %08x %08x\n", log_write_selector,
3250     log_extra_selector);
3251   }
3252
3253 /* If domain literals are not allowed, check the sender address that was
3254 supplied with -f. Ditto for a stripped trailing dot. */
3255
3256 if (sender_address != NULL)
3257   {
3258   if (sender_address[sender_address_domain] == '[' && !allow_domain_literals)
3259     {
3260     fprintf(stderr, "exim: bad -f address \"%s\": domain literals not "
3261       "allowed\n", sender_address);
3262     return EXIT_FAILURE;
3263     }
3264   if (f_end_dot && !strip_trailing_dot)
3265     {
3266     fprintf(stderr, "exim: bad -f address \"%s.\": domain is malformed "
3267       "(trailing dot not allowed)\n", sender_address);
3268     return EXIT_FAILURE;
3269     }
3270   }
3271
3272 /* Paranoia check of maximum lengths of certain strings. There is a check
3273 on the length of the log file path in log.c, which will come into effect
3274 if there are any calls to write the log earlier than this. However, if we
3275 get this far but the string is very long, it is better to stop now than to
3276 carry on and (e.g.) receive a message and then have to collapse. The call to
3277 log_write() from here will cause the ultimate panic collapse if the complete
3278 file name exceeds the buffer length. */
3279
3280 if (Ustrlen(log_file_path) > 200)
3281   log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3282     "log_file_path is longer than 200 chars: aborting");
3283
3284 if (Ustrlen(pid_file_path) > 200)
3285   log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3286     "pid_file_path is longer than 200 chars: aborting");
3287
3288 if (Ustrlen(spool_directory) > 200)
3289   log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3290     "spool_directory is longer than 200 chars: aborting");
3291
3292 /* Length check on the process name given to syslog for its TAG field,
3293 which is only permitted to be 32 characters or less. See RFC 3164. */
3294
3295 if (Ustrlen(syslog_processname) > 32)
3296   log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3297     "syslog_processname is longer than 32 chars: aborting");
3298
3299 /* In some operating systems, the environment variable TMPDIR controls where
3300 temporary files are created; Exim doesn't use these (apart from when delivering
3301 to MBX mailboxes), but called libraries such as DBM libraries may require them.
3302 If TMPDIR is found in the environment, reset it to the value defined in the
3303 TMPDIR macro, if this macro is defined. */
3304
3305 #ifdef TMPDIR
3306   {
3307   uschar **p;
3308   for (p = USS environ; *p != NULL; p++)
3309     {
3310     if (Ustrncmp(*p, "TMPDIR=", 7) == 0 &&
3311         Ustrcmp(*p+7, TMPDIR) != 0)
3312       {
3313       uschar *newp = malloc(Ustrlen(TMPDIR) + 8);
3314       sprintf(CS newp, "TMPDIR=%s", TMPDIR);
3315       *p = newp;
3316       DEBUG(D_any) debug_printf("reset TMPDIR=%s in environment\n", TMPDIR);
3317       }
3318     }
3319   }
3320 #endif
3321
3322 /* Timezone handling. If timezone_string is "utc", set a flag to cause all
3323 timestamps to be in UTC (gmtime() is used instead of localtime()). Otherwise,
3324 we may need to get rid of a bogus timezone setting. This can arise when Exim is
3325 called by a user who has set the TZ variable. This then affects the timestamps
3326 in log files and in Received: headers, and any created Date: header lines. The
3327 required timezone is settable in the configuration file, so nothing can be done
3328 about this earlier - but hopefully nothing will normally be logged earlier than
3329 this. We have to make a new environment if TZ is wrong, but don't bother if
3330 timestamps_utc is set, because then all times are in UTC anyway. */
3331
3332 if (timezone_string != NULL && strcmpic(timezone_string, US"UTC") == 0)
3333   {
3334   timestamps_utc = TRUE;
3335   }
3336 else
3337   {
3338   uschar *envtz = US getenv("TZ");
3339   if ((envtz == NULL && timezone_string != NULL) ||
3340       (envtz != NULL &&
3341         (timezone_string == NULL ||
3342          Ustrcmp(timezone_string, envtz) != 0)))
3343     {
3344     uschar **p = USS environ;
3345     uschar **new;
3346     uschar **newp;
3347     int count = 0;
3348     while (*p++ != NULL) count++;
3349     if (envtz == NULL) count++;
3350     newp = new = malloc(sizeof(uschar *) * (count + 1));
3351     for (p = USS environ; *p != NULL; p++)
3352       {
3353       if (Ustrncmp(*p, "TZ=", 3) == 0) continue;
3354       *newp++ = *p;
3355       }
3356     if (timezone_string != NULL)
3357       {
3358       *newp = malloc(Ustrlen(timezone_string) + 4);
3359       sprintf(CS *newp++, "TZ=%s", timezone_string);
3360       }
3361     *newp = NULL;
3362     environ = CSS new;
3363     tzset();
3364     DEBUG(D_any) debug_printf("Reset TZ to %s: time is %s\n", timezone_string,
3365       tod_stamp(tod_log));
3366     }
3367   }
3368
3369 /* Handle the case when we have removed the setuid privilege because of -C or
3370 -D. This means that the caller of Exim was not root, and, provided that
3371 ALT_CONFIG_ROOT_ONLY is not defined, was not the Exim user that is built into
3372 the binary.
3373
3374 If ALT_CONFIG_ROOT_ONLY is not defined, there is a problem if it turns out we
3375 were running as the exim user defined in the configuration file (different to
3376 the one in the binary). The sysadmin may expect this case to retain privilege
3377 because "the binary was called by the Exim user", but it hasn't, because of the
3378 order in which it handles this stuff. There are two possibilities:
3379
3380   (1) If deliver_drop_privilege is set, Exim is not going to re-exec in order
3381       to do message deliveries. Thus, the fact that it is running as a
3382       non-privileged user is plausible, and might be wanted in some special
3383       configurations. However, really_exim will have been set false when
3384       privilege was dropped, to stop Exim trying to write to its normal log
3385       files. Therefore, re-enable normal log processing, assuming the sysadmin
3386       has set up the log directory correctly.
3387
3388   (2) If deliver_drop_privilege is not set, the configuration won't work as
3389       apparently intended, and so we log a panic message. In order to retain
3390       root for -C or -D, the caller must either be root or the Exim user
3391       defined in the binary (when deliver_drop_ privilege is false).
3392
3393 If ALT_CONFIG_ROOT_ONLY is defined, we don't know whether we were called by the
3394 built-in exim user or one defined in the configuration. In either event,
3395 re-enable log processing, assuming the sysadmin knows what they are doing. */
3396
3397 if (removed_privilege && (config_changed || macros != NULL) &&
3398     real_uid == exim_uid)
3399   {
3400   #ifdef ALT_CONFIG_ROOT_ONLY
3401   really_exim = TRUE;   /* let logging work normally */
3402   #else
3403
3404   if (deliver_drop_privilege)
3405     really_exim = TRUE; /* let logging work normally */
3406   else
3407     log_write(0, LOG_MAIN|LOG_PANIC,
3408       "exim user (uid=%d) is defined only at runtime; privilege lost for %s",
3409       (int)exim_uid, config_changed? "-C" : "-D");
3410   #endif
3411   }
3412
3413 /* Start up Perl interpreter if Perl support is configured and there is a
3414 perl_startup option, and the configuration or the command line specifies
3415 initializing starting. Note that the global variables are actually called
3416 opt_perl_xxx to avoid clashing with perl's namespace (perl_*). */
3417
3418 #ifdef EXIM_PERL
3419 if (perl_start_option != 0)
3420   opt_perl_at_start = (perl_start_option > 0);
3421 if (opt_perl_at_start && opt_perl_startup != NULL)
3422   {
3423   uschar *errstr;
3424   DEBUG(D_any) debug_printf("Starting Perl interpreter\n");
3425   errstr = init_perl(opt_perl_startup);
3426   if (errstr != NULL)
3427     {
3428     fprintf(stderr, "exim: error in perl_startup code: %s\n", errstr);
3429     return EXIT_FAILURE;
3430     }
3431   opt_perl_started = TRUE;
3432   }
3433 #endif /* EXIM_PERL */
3434
3435 /* Log the arguments of the call if the configuration file said so. This is
3436 a debugging feature for finding out what arguments certain MUAs actually use.
3437 Don't attempt it if logging is disabled, or if listing variables or if
3438 verifying/testing addresses or expansions. */
3439
3440 if (((debug_selector & D_any) != 0 || (log_extra_selector & LX_arguments) != 0)
3441       && really_exim && !list_options && !checking)
3442   {
3443   int i;
3444   uschar *p = big_buffer;
3445   Ustrcpy(p, "cwd=");
3446   (void)getcwd(CS p+4, big_buffer_size - 4);
3447   while (*p) p++;
3448   (void)string_format(p, big_buffer_size - (p - big_buffer), " %d args:", argc);
3449   while (*p) p++;
3450   for (i = 0; i < argc; i++)
3451     {
3452     int len = Ustrlen(argv[i]);
3453     uschar *printing;
3454     uschar *quote;
3455     if (p + len + 8 >= big_buffer + big_buffer_size)
3456       {
3457       Ustrcpy(p, " ...");
3458       log_write(0, LOG_MAIN, "%s", big_buffer);
3459       Ustrcpy(big_buffer, "...");
3460       p = big_buffer + 3;
3461       }
3462     printing = string_printing(argv[i]);
3463     if (printing[0] == 0) quote = US"\""; else
3464       {
3465       uschar *pp = printing;
3466       quote = US"";
3467       while (*pp != 0) if (isspace(*pp++)) { quote = US"\""; break; }
3468       }
3469     sprintf(CS p, " %s%.*s%s", quote, (int)(big_buffer_size -
3470       (p - big_buffer) - 4), printing, quote);
3471     while (*p) p++;
3472     }
3473
3474   if ((log_extra_selector & LX_arguments) != 0)
3475     log_write(0, LOG_MAIN, "%s", big_buffer);
3476   else
3477     debug_printf("%s\n", big_buffer);
3478   }
3479
3480 /* Set the working directory to be the top-level spool directory. We don't rely
3481 on this in the code, which always uses fully qualified names, but it's useful
3482 for core dumps etc. Don't complain if it fails - the spool directory might not
3483 be generally accessible and calls with the -C option (and others) have lost
3484 privilege by now. Before the chdir, we try to ensure that the directory exists.
3485 */
3486
3487 if (Uchdir(spool_directory) != 0)
3488   {
3489   (void)directory_make(spool_directory, US"", SPOOL_DIRECTORY_MODE, FALSE);
3490   (void)Uchdir(spool_directory);
3491   }
3492
3493 /* Handle calls with the -bi option. This is a sendmail option to rebuild *the*
3494 alias file. Exim doesn't have such a concept, but this call is screwed into
3495 Sun's YP makefiles. Handle this by calling a configured script, as the real
3496 user who called Exim. The -oA option can be used to pass an argument to the
3497 script. */
3498
3499 if (bi_option)
3500   {
3501   (void)fclose(config_file);
3502   if (bi_command != NULL)
3503     {
3504     int i = 0;
3505     uschar *argv[3];
3506     argv[i++] = bi_command;
3507     if (alias_arg != NULL) argv[i++] = alias_arg;
3508     argv[i++] = NULL;
3509
3510     setgroups(group_count, group_list);
3511     exim_setugid(real_uid, real_gid, FALSE, US"running bi_command");
3512
3513     DEBUG(D_exec) debug_printf("exec %.256s %.256s\n", argv[0],
3514       (argv[1] == NULL)? US"" : argv[1]);
3515
3516     execv(CS argv[0], (char *const *)argv);
3517     fprintf(stderr, "exim: exec failed: %s\n", strerror(errno));
3518     exit(EXIT_FAILURE);
3519     }
3520   else
3521     {
3522     DEBUG(D_any) debug_printf("-bi used but bi_command not set; exiting\n");
3523     exit(EXIT_SUCCESS);
3524     }
3525   }
3526
3527 /* If an action on specific messages is requested, or if a daemon or queue
3528 runner is being started, we need to know if Exim was called by an admin user.
3529 This is the case if the real user is root or exim, or if the real group is
3530 exim, or if one of the supplementary groups is exim or a group listed in
3531 admin_groups. We don't fail all message actions immediately if not admin_user,
3532 since some actions can be performed by non-admin users. Instead, set admin_user
3533 for later interrogation. */
3534
3535 if (real_uid == root_uid || real_uid == exim_uid || real_gid == exim_gid)
3536   admin_user = TRUE;
3537 else
3538   {
3539   int i, j;
3540   for (i = 0; i < group_count; i++)
3541     {
3542     if (group_list[i] == exim_gid) admin_user = TRUE;
3543     else if (admin_groups != NULL)
3544       {
3545       for (j = 1; j <= (int)(admin_groups[0]); j++)
3546         if (admin_groups[j] == group_list[i])
3547           { admin_user = TRUE; break; }
3548       }
3549     if (admin_user) break;
3550     }
3551   }
3552
3553 /* Another group of privileged users are the trusted users. These are root,
3554 exim, and any caller matching trusted_users or trusted_groups. Trusted callers
3555 are permitted to specify sender_addresses with -f on the command line, and
3556 other message parameters as well. */
3557
3558 if (real_uid == root_uid || real_uid == exim_uid)
3559   trusted_caller = TRUE;
3560 else
3561   {
3562   int i, j;
3563
3564   if (trusted_users != NULL)
3565     {
3566     for (i = 1; i <= (int)(trusted_users[0]); i++)
3567       if (trusted_users[i] == real_uid)
3568         { trusted_caller = TRUE; break; }
3569     }
3570
3571   if (!trusted_caller && trusted_groups != NULL)
3572     {
3573     for (i = 1; i <= (int)(trusted_groups[0]); i++)
3574       {
3575       if (trusted_groups[i] == real_gid)
3576         trusted_caller = TRUE;
3577       else for (j = 0; j < group_count; j++)
3578         {
3579         if (trusted_groups[i] == group_list[j])
3580           { trusted_caller = TRUE; break; }
3581         }
3582       if (trusted_caller) break;
3583       }
3584     }
3585   }
3586
3587 if (trusted_caller) DEBUG(D_any) debug_printf("trusted user\n");
3588 if (admin_user) DEBUG(D_any) debug_printf("admin user\n");
3589
3590 /* Only an admin user may start the daemon or force a queue run in the default
3591 configuration, but the queue run restriction can be relaxed. Only an admin
3592 user may request that a message be returned to its sender forthwith. Only an
3593 admin user may specify a debug level greater than D_v (because it might show
3594 passwords, etc. in lookup queries). Only an admin user may request a queue
3595 count. */
3596
3597 if (!admin_user)
3598   {
3599   BOOL debugset = (debug_selector & ~D_v) != 0;
3600   if (deliver_give_up || daemon_listen ||
3601      (count_queue && queue_list_requires_admin) ||
3602      (list_queue && queue_list_requires_admin) ||
3603      (queue_interval >= 0 && prod_requires_admin) ||
3604      (debugset && !running_in_test_harness))
3605     {
3606     fprintf(stderr, "exim:%s permission denied\n", debugset? " debugging" : "");
3607     exit(EXIT_FAILURE);
3608     }
3609   }
3610
3611 /* If the real user is not root or the exim uid, the argument for passing
3612 in an open TCP/IP connection for another message is not permitted, nor is
3613 running with the -N option for any delivery action, unless this call to exim is
3614 one that supplied an input message, or we are using a patched exim for
3615 regression testing. */
3616
3617 if (real_uid != root_uid && real_uid != exim_uid &&
3618      (continue_hostname != NULL ||
3619        (dont_deliver &&
3620          (queue_interval >= 0 || daemon_listen || msg_action_arg > 0)
3621        )) && !running_in_test_harness)
3622   {
3623   fprintf(stderr, "exim: Permission denied\n");
3624   return EXIT_FAILURE;
3625   }
3626
3627 /* If the caller is not trusted, certain arguments are ignored when running for
3628 real, but are permitted when checking things (-be, -bv, -bt, -bh, -bf, -bF).
3629 Note that authority for performing certain actions on messages is tested in the
3630 queue_action() function. */
3631
3632 if (!trusted_caller && !checking && filter_test == FTEST_NONE)
3633   {
3634   sender_host_name = sender_host_address = interface_address =
3635     sender_ident = received_protocol = NULL;
3636   sender_host_port = interface_port = 0;
3637   sender_host_authenticated = authenticated_sender = authenticated_id = NULL;
3638   }
3639
3640 /* If a sender host address is set, extract the optional port number off the
3641 end of it and check its syntax. Do the same thing for the interface address.
3642 Exim exits if the syntax is bad. */
3643
3644 else
3645   {
3646   if (sender_host_address != NULL)
3647     sender_host_port = check_port(sender_host_address);
3648   if (interface_address != NULL)
3649     interface_port = check_port(interface_address);
3650   }
3651
3652 /* If an SMTP message is being received check to see if the standard input is a
3653 TCP/IP socket. If it is, we assume that Exim was called from inetd if the
3654 caller is root or the Exim user, or if the port is a privileged one. Otherwise,
3655 barf. */
3656
3657 if (smtp_input)
3658   {
3659   union sockaddr_46 inetd_sock;
3660   EXIM_SOCKLEN_T size = sizeof(inetd_sock);
3661   if (getpeername(0, (struct sockaddr *)(&inetd_sock), &size) == 0)
3662     {
3663     int family = ((struct sockaddr *)(&inetd_sock))->sa_family;
3664     if (family == AF_INET || family == AF_INET6)
3665       {
3666       union sockaddr_46 interface_sock;
3667       size = sizeof(interface_sock);
3668
3669       if (getsockname(0, (struct sockaddr *)(&interface_sock), &size) == 0)
3670         interface_address = host_ntoa(-1, &interface_sock, NULL,
3671           &interface_port);
3672
3673       if (host_is_tls_on_connect_port(interface_port)) tls_on_connect = TRUE;
3674
3675       if (real_uid == root_uid || real_uid == exim_uid || interface_port < 1024)
3676         {
3677         is_inetd = TRUE;
3678         sender_host_address = host_ntoa(-1, (struct sockaddr *)(&inetd_sock),
3679           NULL, &sender_host_port);
3680         if (mua_wrapper) log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Input from "
3681           "inetd is not supported when mua_wrapper is set");
3682         }
3683       else
3684         {
3685         fprintf(stderr,
3686           "exim: Permission denied (unprivileged user, unprivileged port)\n");
3687         return EXIT_FAILURE;
3688         }
3689       }
3690     }
3691   }
3692
3693 /* If the load average is going to be needed while receiving a message, get it
3694 now for those OS that require the first call to os_getloadavg() to be done as
3695 root. There will be further calls later for each message received. */
3696
3697 #ifdef LOAD_AVG_NEEDS_ROOT
3698 if (receiving_message &&
3699       (queue_only_load >= 0 ||
3700         (is_inetd && smtp_load_reserve >= 0)
3701       ))
3702   {
3703   load_average = OS_GETLOADAVG();
3704   }
3705 #endif
3706
3707 /* The queue_only configuration option can be overridden by -odx on the command
3708 line, except that if queue_only_override is false, queue_only cannot be unset
3709 from the command line. */
3710
3711 if (queue_only_set && (queue_only_override || arg_queue_only))
3712   queue_only = arg_queue_only;
3713
3714 /* The receive_timeout and smtp_receive_timeout options can be overridden by
3715 -or and -os. */
3716
3717 if (arg_receive_timeout >= 0) receive_timeout = arg_receive_timeout;
3718 if (arg_smtp_receive_timeout >= 0)
3719   smtp_receive_timeout = arg_smtp_receive_timeout;
3720
3721 /* If Exim was started with root privilege, unless we have already removed the
3722 root privilege above as a result of -C, -D, -be, -bf or -bF, remove it now
3723 except when starting the daemon or doing some kind of delivery or address
3724 testing (-bt). These are the only cases when root need to be retained. We run
3725 as exim for -bv and -bh. However, if deliver_drop_privilege is set, root is
3726 retained only for starting the daemon. We always do the initgroups() in this
3727 situation (controlled by the TRUE below), in order to be as close as possible
3728 to the state Exim usually runs in. */
3729
3730 if (!unprivileged &&                      /* originally had root AND */
3731     !removed_privilege &&                 /* still got root AND      */
3732     !daemon_listen &&                     /* not starting the daemon */
3733     queue_interval <= 0 &&                /* (either kind of daemon) */
3734       (                                   /*    AND EITHER           */
3735       deliver_drop_privilege ||           /* requested unprivileged  */
3736         (                                 /*       OR                */
3737         queue_interval < 0 &&             /* not running the queue   */
3738         (msg_action_arg < 0 ||            /*       and               */
3739           msg_action != MSG_DELIVER) &&   /* not delivering and      */
3740         (!checking || !address_test_mode) /* not address checking    */
3741         )
3742       ))
3743   {
3744   exim_setugid(exim_uid, exim_gid, TRUE, US"privilege not needed");
3745   }
3746
3747 /* When we are retaining a privileged uid, we still change to the exim gid. */
3748
3749 else setgid(exim_gid);
3750
3751 /* Handle a request to list the delivery queue */
3752
3753 if (list_queue)
3754   {
3755   set_process_info("listing the queue");
3756   queue_list(list_queue_option, argv + recipients_arg, argc - recipients_arg);
3757   exit(EXIT_SUCCESS);
3758   }
3759
3760 /* Handle a request to count the delivery queue */
3761
3762 if (count_queue)
3763   {
3764   set_process_info("counting the queue");
3765   queue_count();
3766   exit(EXIT_SUCCESS);
3767   }
3768
3769 /* Handle actions on specific messages, except for the force delivery and
3770 message load actions, which are done below. Some actions take a whole list of
3771 message ids, which are known to continue up to the end of the arguments. Others
3772 take a single message id and then operate on the recipients list. */
3773
3774 if (msg_action_arg > 0 && msg_action != MSG_DELIVER && msg_action != MSG_LOAD)
3775   {
3776   int yield = EXIT_SUCCESS;
3777   set_process_info("acting on specified messages");
3778
3779   if (!one_msg_action)
3780     {
3781     for (i = msg_action_arg; i < argc; i++)
3782       if (!queue_action(argv[i], msg_action, NULL, 0, 0))
3783         yield = EXIT_FAILURE;
3784     }
3785
3786   else if (!queue_action(argv[msg_action_arg], msg_action, argv, argc,
3787     recipients_arg)) yield = EXIT_FAILURE;
3788   exit(yield);
3789   }
3790
3791 /* All the modes below here require the remaining configuration sections
3792 to be read, except that we can skip over the ACL setting when delivering
3793 specific messages, or doing a queue run. (For various testing cases we could
3794 skip too, but as they are rare, it doesn't really matter.) The argument is TRUE
3795 for skipping. */
3796
3797 readconf_rest(msg_action_arg > 0 || (queue_interval == 0 && !daemon_listen));
3798
3799 /* The configuration data will have been read into POOL_PERM because we won't
3800 ever want to reset back past it. Change the current pool to POOL_MAIN. In fact,
3801 this is just a bit of pedantic tidiness. It wouldn't really matter if the
3802 configuration were read into POOL_MAIN, because we don't do any resets till
3803 later on. However, it seems right, and it does ensure that both pools get used.
3804 */
3805
3806 store_pool = POOL_MAIN;
3807
3808 /* Handle the -brt option. This is for checking out retry configurations.
3809 The next three arguments are a domain name or a complete address, and
3810 optionally two error numbers. All it does is to call the function that
3811 scans the retry configuration data. */
3812
3813 if (test_retry_arg >= 0)
3814   {
3815   retry_config *yield;
3816   int basic_errno = 0;
3817   int more_errno = 0;
3818   uschar *s1, *s2;
3819
3820   if (test_retry_arg >= argc)
3821     {
3822     printf("-brt needs a domain or address argument\n");
3823     exim_exit(EXIT_FAILURE);
3824     }
3825   s1 = argv[test_retry_arg++];
3826   s2 = NULL;
3827
3828   /* If the first argument contains no @ and no . it might be a local user
3829   or it might be a single-component name. Treat as a domain. */
3830
3831   if (Ustrchr(s1, '@') == NULL && Ustrchr(s1, '.') == NULL)
3832     {
3833     printf("Warning: \"%s\" contains no '@' and no '.' characters. It is "
3834       "being \ntreated as a one-component domain, not as a local part.\n\n",
3835       s1);
3836     }
3837
3838   /* There may be an optional second domain arg. */
3839
3840   if (test_retry_arg < argc && Ustrchr(argv[test_retry_arg], '.') != NULL)
3841     s2 = argv[test_retry_arg++];
3842
3843   /* The final arg is an error name */
3844
3845   if (test_retry_arg < argc)
3846     {
3847     uschar *ss = argv[test_retry_arg];
3848     uschar *error =
3849       readconf_retry_error(ss, ss + Ustrlen(ss), &basic_errno, &more_errno);
3850     if (error != NULL)
3851       {
3852       printf("%s\n", CS error);
3853       return EXIT_FAILURE;
3854       }
3855
3856     /* For the {MAIL,RCPT,DATA}_4xx errors, a value of 255 means "any", and a
3857     code > 100 as an error is for matching codes to the decade. Turn them into
3858     a real error code, off the decade. */
3859
3860     if (basic_errno == ERRNO_MAIL4XX ||
3861         basic_errno == ERRNO_RCPT4XX ||
3862         basic_errno == ERRNO_DATA4XX)
3863       {
3864       int code = (more_errno >> 8) & 255;
3865       if (code == 255)
3866         more_errno = (more_errno & 0xffff00ff) | (21 << 8);
3867       else if (code > 100)
3868         more_errno = (more_errno & 0xffff00ff) | ((code - 96) << 8);
3869       }
3870     }
3871
3872   yield = retry_find_config(s1, s2, basic_errno, more_errno);
3873   if (yield == NULL) printf("No retry information found\n"); else
3874     {
3875     retry_rule *r;
3876     more_errno = yield->more_errno;
3877     printf("Retry rule: %s  ", yield->pattern);
3878
3879     if (yield->basic_errno == ERRNO_EXIMQUOTA)
3880       {
3881       printf("quota%s%s  ",
3882         (more_errno > 0)? "_" : "",
3883         (more_errno > 0)? readconf_printtime(more_errno) : US"");
3884       }
3885     else if (yield->basic_errno == ECONNREFUSED)
3886       {
3887       printf("refused%s%s  ",
3888         (more_errno > 0)? "_" : "",
3889         (more_errno == 'M')? "MX" :
3890         (more_errno == 'A')? "A" : "");
3891       }
3892     else if (yield->basic_errno == ETIMEDOUT)
3893       {
3894       printf("timeout");
3895       if ((more_errno & RTEF_CTOUT) != 0) printf("_connect");
3896       more_errno &= 255;
3897       if (more_errno != 0) printf("_%s",
3898         (more_errno == 'M')? "MX" : "A");
3899       printf("  ");
3900       }
3901     else if (yield->basic_errno == ERRNO_AUTHFAIL)
3902       printf("auth_failed  ");
3903     else printf("*  ");
3904
3905     for (r = yield->rules; r != NULL; r = r->next)
3906       {
3907       printf("%c,%s", r->rule, readconf_printtime(r->timeout)); /* Do not */
3908       printf(",%s", readconf_printtime(r->p1));                 /* amalgamate */
3909       if (r->rule == 'G')
3910         {
3911         int x = r->p2;
3912         int f = x % 1000;
3913         int d = 100;
3914         printf(",%d.", x/1000);
3915         do
3916           {
3917           printf("%d", f/d);
3918           f %= d;
3919           d /= 10;
3920           }
3921         while (f != 0);
3922         }
3923       printf("; ");
3924       }
3925
3926     printf("\n");
3927     }
3928   exim_exit(EXIT_SUCCESS);
3929   }
3930
3931 /* Handle a request to list one or more configuration options */
3932
3933 if (list_options)
3934   {
3935   set_process_info("listing variables");
3936   if (recipients_arg >= argc) readconf_print(US"all", NULL);
3937     else for (i = recipients_arg; i < argc; i++)
3938       {
3939       if (i < argc - 1 &&
3940           (Ustrcmp(argv[i], "router") == 0 ||
3941            Ustrcmp(argv[i], "transport") == 0 ||
3942            Ustrcmp(argv[i], "authenticator") == 0))
3943         {
3944         readconf_print(argv[i+1], argv[i]);
3945         i++;
3946         }
3947       else readconf_print(argv[i], NULL);
3948       }
3949   exim_exit(EXIT_SUCCESS);
3950   }
3951
3952
3953 /* Handle a request to deliver one or more messages that are already on the
3954 queue. Values of msg_action other than MSG_DELIVER and MSG_LOAD are dealt with
3955 above. MSG_LOAD is handled with -be (which is the only time it applies) below.
3956
3957 Delivery of specific messages is typically used for a small number when
3958 prodding by hand (when the option forced_delivery will be set) or when
3959 re-execing to regain root privilege. Each message delivery must happen in a
3960 separate process, so we fork a process for each one, and run them sequentially
3961 so that debugging output doesn't get intertwined, and to avoid spawning too
3962 many processes if a long list is given. However, don't fork for the last one;
3963 this saves a process in the common case when Exim is called to deliver just one
3964 message. */
3965
3966 if (msg_action_arg > 0 && msg_action != MSG_LOAD)
3967   {
3968   if (prod_requires_admin && !admin_user)
3969     {
3970     fprintf(stderr, "exim: Permission denied\n");
3971     exim_exit(EXIT_FAILURE);
3972     }
3973   set_process_info("delivering specified messages");
3974   if (deliver_give_up) forced_delivery = deliver_force_thaw = TRUE;
3975   for (i = msg_action_arg; i < argc; i++)
3976     {
3977     int status;
3978     pid_t pid;
3979     if (i == argc - 1)
3980       (void)deliver_message(argv[i], forced_delivery, deliver_give_up);
3981     else if ((pid = fork()) == 0)
3982       {
3983       (void)deliver_message(argv[i], forced_delivery, deliver_give_up);
3984       _exit(EXIT_SUCCESS);
3985       }
3986     else if (pid < 0)
3987       {
3988       fprintf(stderr, "failed to fork delivery process for %s: %s\n", argv[i],
3989         strerror(errno));
3990       exim_exit(EXIT_FAILURE);
3991       }
3992     else wait(&status);
3993     }
3994   exim_exit(EXIT_SUCCESS);
3995   }
3996
3997
3998 /* If only a single queue run is requested, without SMTP listening, we can just
3999 turn into a queue runner, with an optional starting message id. */
4000
4001 if (queue_interval == 0 && !daemon_listen)
4002   {
4003   DEBUG(D_queue_run) debug_printf("Single queue run%s%s%s%s\n",
4004     (start_queue_run_id == NULL)? US"" : US" starting at ",
4005     (start_queue_run_id == NULL)? US"" : start_queue_run_id,
4006     (stop_queue_run_id == NULL)?  US"" : US" stopping at ",
4007     (stop_queue_run_id == NULL)?  US"" : stop_queue_run_id);
4008   set_process_info("running the queue (single queue run)");
4009   queue_run(start_queue_run_id, stop_queue_run_id, FALSE);
4010   exim_exit(EXIT_SUCCESS);
4011   }
4012
4013
4014 /* Find the login name of the real user running this process. This is always
4015 needed when receiving a message, because it is written into the spool file. It
4016 may also be used to construct a from: or a sender: header, and in this case we
4017 need the user's full name as well, so save a copy of it, checked for RFC822
4018 syntax and munged if necessary, if it hasn't previously been set by the -F
4019 argument. We may try to get the passwd entry more than once, in case NIS or
4020 other delays are in evidence. Save the home directory for use in filter testing
4021 (only). */
4022
4023 for (i = 0;;)
4024   {
4025   if ((pw = getpwuid(real_uid)) != NULL)
4026     {
4027     originator_login = string_copy(US pw->pw_name);
4028     originator_home = string_copy(US pw->pw_dir);
4029
4030     /* If user name has not been set by -F, set it from the passwd entry
4031     unless -f has been used to set the sender address by a trusted user. */
4032
4033     if (originator_name == NULL)
4034       {
4035       if (sender_address == NULL ||
4036            (!trusted_caller && filter_test == FTEST_NONE))
4037         {
4038         uschar *name = US pw->pw_gecos;
4039         uschar *amp = Ustrchr(name, '&');
4040         uschar buffer[256];
4041
4042         /* Most Unix specify that a '&' character in the gecos field is
4043         replaced by a copy of the login name, and some even specify that
4044         the first character should be upper cased, so that's what we do. */
4045
4046         if (amp != NULL)
4047           {
4048           int loffset;
4049           string_format(buffer, sizeof(buffer), "%.*s%n%s%s",
4050             amp - name, name, &loffset, originator_login, amp + 1);
4051           buffer[loffset] = toupper(buffer[loffset]);
4052           name = buffer;
4053           }
4054
4055         /* If a pattern for matching the gecos field was supplied, apply
4056         it and then expand the name string. */
4057
4058         if (gecos_pattern != NULL && gecos_name != NULL)
4059           {
4060           const pcre *re;
4061           re = regex_must_compile(gecos_pattern, FALSE, TRUE); /* Use malloc */
4062
4063           if (regex_match_and_setup(re, name, 0, -1))
4064             {
4065             uschar *new_name = expand_string(gecos_name);
4066             expand_nmax = -1;
4067             if (new_name != NULL)
4068               {
4069               DEBUG(D_receive) debug_printf("user name \"%s\" extracted from "
4070                 "gecos field \"%s\"\n", new_name, name);
4071               name = new_name;
4072               }
4073             else DEBUG(D_receive) debug_printf("failed to expand gecos_name string "
4074               "\"%s\": %s\n", gecos_name, expand_string_message);
4075             }
4076           else DEBUG(D_receive) debug_printf("gecos_pattern \"%s\" did not match "
4077             "gecos field \"%s\"\n", gecos_pattern, name);
4078           store_free((void *)re);
4079           }
4080         originator_name = string_copy(name);
4081         }
4082
4083       /* A trusted caller has used -f but not -F */
4084
4085       else originator_name = US"";
4086       }
4087
4088     /* Break the retry loop */
4089
4090     break;
4091     }
4092
4093   if (++i > finduser_retries) break;
4094   sleep(1);
4095   }
4096
4097 /* If we cannot get a user login, log the incident and give up, unless the
4098 configuration specifies something to use. When running in the test harness,
4099 any setting of unknown_login overrides the actual name. */
4100
4101 if (originator_login == NULL || running_in_test_harness)
4102   {
4103   if (unknown_login != NULL)
4104     {
4105     originator_login = expand_string(unknown_login);
4106     if (originator_name == NULL && unknown_username != NULL)
4107       originator_name = expand_string(unknown_username);
4108     if (originator_name == NULL) originator_name = US"";
4109     }
4110   if (originator_login == NULL)
4111     log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Failed to get user name for uid %d",
4112       (int)real_uid);
4113   }
4114
4115 /* Ensure that the user name is in a suitable form for use as a "phrase" in an
4116 RFC822 address.*/
4117
4118 originator_name = string_copy(parse_fix_phrase(originator_name,
4119   Ustrlen(originator_name), big_buffer, big_buffer_size));
4120
4121 /* If a message is created by this call of Exim, the uid/gid of its originator
4122 are those of the caller. These values are overridden if an existing message is
4123 read in from the spool. */
4124
4125 originator_uid = real_uid;
4126 originator_gid = real_gid;
4127
4128 DEBUG(D_receive) debug_printf("originator: uid=%d gid=%d login=%s name=%s\n",
4129   (int)originator_uid, (int)originator_gid, originator_login, originator_name);
4130
4131 /* Run in daemon and/or queue-running mode. The function daemon_go() never
4132 returns. We leave this till here so that the originator_ fields are available
4133 for incoming messages via the daemon. The daemon cannot be run in mua_wrapper
4134 mode. */
4135
4136 if (daemon_listen || queue_interval > 0)
4137   {
4138   if (mua_wrapper)
4139     {
4140     fprintf(stderr, "Daemon cannot be run when mua_wrapper is set\n");
4141     log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Daemon cannot be run when "
4142       "mua_wrapper is set");
4143     }
4144   daemon_go();
4145   }
4146
4147 /* If the sender ident has not been set (by a trusted caller) set it to
4148 the caller. This will get overwritten below for an inetd call. If a trusted
4149 caller has set it empty, unset it. */
4150
4151 if (sender_ident == NULL) sender_ident = originator_login;
4152   else if (sender_ident[0] == 0) sender_ident = NULL;
4153
4154 /* Handle the -brw option, which is for checking out rewriting rules. Cause log
4155 writes (on errors) to go to stderr instead. Can't do this earlier, as want the
4156 originator_* variables set. */
4157
4158 if (test_rewrite_arg >= 0)
4159   {
4160   really_exim = FALSE;
4161   if (test_rewrite_arg >= argc)
4162     {
4163     printf("-brw needs an address argument\n");
4164     exim_exit(EXIT_FAILURE);
4165     }
4166   rewrite_test(argv[test_rewrite_arg]);
4167   exim_exit(EXIT_SUCCESS);
4168   }
4169
4170 /* A locally-supplied message is considered to be coming from a local user
4171 unless a trusted caller supplies a sender address with -f, or is passing in the
4172 message via SMTP (inetd invocation or otherwise). */
4173
4174 if ((sender_address == NULL && !smtp_input) ||
4175     (!trusted_caller && filter_test == FTEST_NONE))
4176   {
4177   sender_local = TRUE;
4178
4179   /* A trusted caller can supply authenticated_sender and authenticated_id
4180   via -oMas and -oMai and if so, they will already be set. Otherwise, force
4181   defaults except when host checking. */
4182
4183   if (authenticated_sender == NULL && !host_checking)
4184     authenticated_sender = string_sprintf("%s@%s", originator_login,
4185       qualify_domain_sender);
4186   if (authenticated_id == NULL && !host_checking)
4187     authenticated_id = originator_login;
4188   }
4189
4190 /* Trusted callers are always permitted to specify the sender address.
4191 Untrusted callers may specify it if it matches untrusted_set_sender, or if what
4192 is specified is the empty address. However, if a trusted caller does not
4193 specify a sender address for SMTP input, we leave sender_address unset. This
4194 causes the MAIL commands to be honoured. */
4195
4196 if ((!smtp_input && sender_address == NULL) ||
4197     !receive_check_set_sender(sender_address))
4198   {
4199   /* Either the caller is not permitted to set a general sender, or this is
4200   non-SMTP input and the trusted caller has not set a sender. If there is no
4201   sender, or if a sender other than <> is set, override with the originator's
4202   login (which will get qualified below), except when checking things. */
4203
4204   if (sender_address == NULL             /* No sender_address set */
4205        ||                                /*         OR            */
4206        (sender_address[0] != 0 &&        /* Non-empty sender address, AND */
4207        !checking &&                      /* Not running tests, AND */
4208        filter_test == FTEST_NONE))       /* Not testing a filter */
4209     {
4210     sender_address = originator_login;
4211     sender_address_forced = FALSE;
4212     sender_address_domain = 0;
4213     }
4214   }
4215
4216 /* Remember whether an untrusted caller set the sender address */
4217
4218 sender_set_untrusted = sender_address != originator_login && !trusted_caller;
4219
4220 /* Ensure that the sender address is fully qualified unless it is the empty
4221 address, which indicates an error message, or doesn't exist (root caller, smtp
4222 interface, no -f argument). */
4223
4224 if (sender_address != NULL && sender_address[0] != 0 &&
4225     sender_address_domain == 0)
4226   sender_address = string_sprintf("%s@%s", local_part_quote(sender_address),
4227     qualify_domain_sender);
4228
4229 DEBUG(D_receive) debug_printf("sender address = %s\n", sender_address);
4230
4231 /* Handle a request to verify a list of addresses, or test them for delivery.
4232 This must follow the setting of the sender address, since routers can be
4233 predicated upon the sender. If no arguments are given, read addresses from
4234 stdin. Set debug_level to at least D_v to get full output for address testing.
4235 */
4236
4237 if (verify_address_mode || address_test_mode)
4238   {
4239   int exit_value = 0;
4240   int flags = vopt_qualify;
4241
4242   if (verify_address_mode)
4243     {
4244     if (!verify_as_sender) flags |= vopt_is_recipient;
4245     DEBUG(D_verify) debug_print_ids(US"Verifying:");
4246     }
4247
4248   else
4249     {
4250     flags |= vopt_is_recipient;
4251     debug_selector |= D_v;
4252     debug_file = stderr;
4253     debug_fd = fileno(debug_file);
4254     DEBUG(D_verify) debug_print_ids(US"Address testing:");
4255     }
4256
4257   if (recipients_arg < argc)
4258     {
4259     while (recipients_arg < argc)
4260       {
4261       uschar *s = argv[recipients_arg++];
4262       while (*s != 0)
4263         {
4264         BOOL finished = FALSE;
4265         uschar *ss = parse_find_address_end(s, FALSE);
4266         if (*ss == ',') *ss = 0; else finished = TRUE;
4267         test_address(s, flags, &exit_value);
4268         s = ss;
4269         if (!finished)
4270           while (*(++s) != 0 && (*s == ',' || isspace(*s)));
4271         }
4272       }
4273     }
4274
4275   else for (;;)
4276     {
4277     uschar *s = get_stdinput(NULL, NULL);
4278     if (s == NULL) break;
4279     test_address(s, flags, &exit_value);
4280     }
4281
4282   route_tidyup();
4283   exim_exit(exit_value);
4284   }
4285
4286 /* Handle expansion checking. Either expand items on the command line, or read
4287 from stdin if there aren't any. If -Mset was specified, load the message so
4288 that its variables can be used, but restrict this facility to admin users.
4289 Otherwise, if -bem was used, read a message from stdin. */
4290
4291 if (expansion_test)
4292   {
4293   if (msg_action_arg > 0 && msg_action == MSG_LOAD)
4294     {
4295     uschar spoolname[256];  /* Not big_buffer; used in spool_read_header() */
4296     if (!admin_user)
4297       {
4298       fprintf(stderr, "exim: permission denied\n");
4299       exit(EXIT_FAILURE);
4300       }
4301     message_id = argv[msg_action_arg];
4302     (void)string_format(spoolname, sizeof(spoolname), "%s-H", message_id);
4303     if (!spool_open_datafile(message_id))
4304       printf ("Failed to load message datafile %s\n", message_id);
4305     if (spool_read_header(spoolname, TRUE, FALSE) != spool_read_OK)
4306       printf ("Failed to load message %s\n", message_id);
4307     }
4308
4309   /* Read a test message from a file. We fudge it up to be on stdin, saving
4310   stdin itself for later reading of expansion strings. */
4311
4312   else if (expansion_test_message != NULL)
4313     {
4314     int save_stdin = dup(0);
4315     int fd = Uopen(expansion_test_message, O_RDONLY, 0);
4316     if (fd < 0)
4317       {
4318       fprintf(stderr, "exim: failed to open %s: %s\n", expansion_test_message,
4319         strerror(errno));
4320       return EXIT_FAILURE;
4321       }
4322     (void) dup2(fd, 0);
4323     filter_test = FTEST_USER;      /* Fudge to make it look like filter test */
4324     message_ended = END_NOTENDED;
4325     read_message_body(receive_msg(extract_recipients));
4326     message_linecount += body_linecount;
4327     (void)dup2(save_stdin, 0);
4328     (void)close(save_stdin);
4329     clearerr(stdin);               /* Required by Darwin */
4330     }
4331
4332   /* Allow $recipients for this testing */
4333
4334   enable_dollar_recipients = TRUE;
4335
4336   /* Expand command line items */
4337
4338   if (recipients_arg < argc)
4339     {
4340     while (recipients_arg < argc)
4341       {
4342       uschar *s = argv[recipients_arg++];
4343       uschar *ss = expand_string(s);
4344       if (ss == NULL) printf ("Failed: %s\n", expand_string_message);
4345       else printf("%s\n", CS ss);
4346       }
4347     }
4348
4349   /* Read stdin */
4350
4351   else
4352     {
4353     char *(*fn_readline)(char *) = NULL;
4354     char *(*fn_addhist)(char *) = NULL;
4355
4356     #ifdef USE_READLINE
4357     void *dlhandle = set_readline(&fn_readline, &fn_addhist);
4358     #endif
4359
4360     for (;;)
4361       {
4362       uschar *ss;
4363       uschar *source = get_stdinput(fn_readline, fn_addhist);
4364       if (source == NULL) break;
4365       ss = expand_string(source);
4366       if (ss == NULL)
4367         printf ("Failed: %s\n", expand_string_message);
4368       else printf("%s\n", CS ss);
4369       }
4370
4371     #ifdef USE_READLINE
4372     if (dlhandle != NULL) dlclose(dlhandle);
4373     #endif
4374     }
4375
4376   /* The data file will be open after -Mset */
4377
4378   if (deliver_datafile >= 0)
4379     {
4380     (void)close(deliver_datafile);
4381     deliver_datafile = -1;
4382     }
4383
4384   exim_exit(EXIT_SUCCESS);
4385   }
4386
4387
4388 /* The active host name is normally the primary host name, but it can be varied
4389 for hosts that want to play several parts at once. We need to ensure that it is
4390 set for host checking, and for receiving messages. */
4391
4392 smtp_active_hostname = primary_hostname;
4393 if (raw_active_hostname != NULL)
4394   {
4395   uschar *nah = expand_string(raw_active_hostname);
4396   if (nah == NULL)
4397     {
4398     if (!expand_string_forcedfail)
4399       log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to expand \"%s\" "
4400         "(smtp_active_hostname): %s", raw_active_hostname,
4401         expand_string_message);
4402     }
4403   else if (nah[0] != 0) smtp_active_hostname = nah;
4404   }
4405
4406 /* Handle host checking: this facility mocks up an incoming SMTP call from a
4407 given IP address so that the blocking and relay configuration can be tested.
4408 Unless a sender_ident was set by -oMt, we discard it (the default is the
4409 caller's login name). An RFC 1413 call is made only if we are running in the
4410 test harness and an incoming interface and both ports are specified, because
4411 there is no TCP/IP call to find the ident for. */
4412
4413 if (host_checking)
4414   {
4415   int x[4];
4416   int size;
4417
4418   if (!sender_ident_set)
4419     {
4420     sender_ident = NULL;
4421     if (running_in_test_harness && sender_host_port != 0 &&
4422         interface_address != NULL && interface_port != 0)
4423       verify_get_ident(1413);
4424     }
4425
4426   /* In case the given address is a non-canonical IPv6 address, canonicize
4427   it. The code works for both IPv4 and IPv6, as it happens. */
4428
4429   size = host_aton(sender_host_address, x);
4430   sender_host_address = store_get(48);  /* large enough for full IPv6 */
4431   (void)host_nmtoa(size, x, -1, sender_host_address, ':');
4432
4433   /* Now set up for testing */
4434
4435   host_build_sender_fullhost();
4436   smtp_input = TRUE;
4437   smtp_in = stdin;
4438   smtp_out = stdout;
4439   sender_local = FALSE;
4440   sender_host_notsocket = TRUE;
4441   debug_file = stderr;
4442   debug_fd = fileno(debug_file);
4443   fprintf(stdout, "\n**** SMTP testing session as if from host %s\n"
4444     "**** but without any ident (RFC 1413) callback.\n"
4445     "**** This is not for real!\n\n",
4446       sender_host_address);
4447
4448   if (verify_check_host(&hosts_connection_nolog) == OK)
4449     log_write_selector &= ~L_smtp_connection;
4450   log_write(L_smtp_connection, LOG_MAIN, "%s", smtp_get_connection_info());
4451
4452   /* NOTE: We do *not* call smtp_log_no_mail() if smtp_start_session() fails,
4453   because a log line has already been written for all its failure exists
4454   (usually "connection refused: <reason>") and writing another one is
4455   unnecessary clutter. */
4456
4457   if (smtp_start_session())
4458     {
4459     reset_point = store_get(0);
4460     for (;;)
4461       {
4462       store_reset(reset_point);
4463       if (smtp_setup_msg() <= 0) break;
4464       if (!receive_msg(FALSE)) break;
4465       }
4466     smtp_log_no_mail();
4467     }
4468   exim_exit(EXIT_SUCCESS);
4469   }
4470
4471
4472 /* Arrange for message reception if recipients or SMTP were specified;
4473 otherwise complain unless a version print (-bV) happened or this is a filter
4474 verification test. In the former case, show the configuration file name. */
4475
4476 if (recipients_arg >= argc && !extract_recipients && !smtp_input)
4477   {
4478   if (version_printed)
4479     {
4480     printf("Configuration file is %s\n", config_main_filename);
4481     return EXIT_SUCCESS;
4482     }
4483
4484   if (filter_test == FTEST_NONE)
4485     exim_usage(called_as);
4486   }
4487
4488
4489 /* If mua_wrapper is set, Exim is being used to turn an MUA that submits on the
4490 standard input into an MUA that submits to a smarthost over TCP/IP. We know
4491 that we are not called from inetd, because that is rejected above. The
4492 following configuration settings are forced here:
4493
4494   (1) Synchronous delivery (-odi)
4495   (2) Errors to stderr (-oep == -oeq)
4496   (3) No parallel remote delivery
4497   (4) Unprivileged delivery
4498
4499 We don't force overall queueing options because there are several of them;
4500 instead, queueing is avoided below when mua_wrapper is set. However, we do need
4501 to override any SMTP queueing. */
4502
4503 if (mua_wrapper)
4504   {
4505   synchronous_delivery = TRUE;
4506   arg_error_handling = ERRORS_STDERR;
4507   remote_max_parallel = 1;
4508   deliver_drop_privilege = TRUE;
4509   queue_smtp = FALSE;
4510   queue_smtp_domains = NULL;
4511   }
4512
4513
4514 /* Prepare to accept one or more new messages on the standard input. When a
4515 message has been read, its id is returned in message_id[]. If doing immediate
4516 delivery, we fork a delivery process for each received message, except for the
4517 last one, where we can save a process switch.
4518
4519 It is only in non-smtp mode that error_handling is allowed to be changed from
4520 its default of ERRORS_SENDER by argument. (Idle thought: are any of the
4521 sendmail error modes other than -oem ever actually used? Later: yes.) */
4522
4523 if (!smtp_input) error_handling = arg_error_handling;
4524
4525 /* If this is an inetd call, ensure that stderr is closed to prevent panic
4526 logging being sent down the socket and make an identd call to get the
4527 sender_ident. */
4528
4529 else if (is_inetd)
4530   {
4531   (void)fclose(stderr);
4532   exim_nullstd();                       /* Re-open to /dev/null */
4533   verify_get_ident(IDENT_PORT);
4534   host_build_sender_fullhost();
4535   set_process_info("handling incoming connection from %s via inetd",
4536     sender_fullhost);
4537   }
4538
4539 /* If the sender host address has been set, build sender_fullhost if it hasn't
4540 already been done (which it will have been for inetd). This caters for the
4541 case when it is forced by -oMa. However, we must flag that it isn't a socket,
4542 so that the test for IP options is skipped for -bs input. */
4543
4544 if (sender_host_address != NULL && sender_fullhost == NULL)
4545   {
4546   host_build_sender_fullhost();
4547   set_process_info("handling incoming connection from %s via -oMa",
4548     sender_fullhost);
4549   sender_host_notsocket = TRUE;
4550   }
4551
4552 /* Otherwise, set the sender host as unknown except for inetd calls. This
4553 prevents host checking in the case of -bs not from inetd and also for -bS. */
4554
4555 else if (!is_inetd) sender_host_unknown = TRUE;
4556
4557 /* If stdout does not exist, then dup stdin to stdout. This can happen
4558 if exim is started from inetd. In this case fd 0 will be set to the socket,
4559 but fd 1 will not be set. This also happens for passed SMTP channels. */
4560
4561 if (fstat(1, &statbuf) < 0) (void)dup2(0, 1);
4562
4563 /* Set up the incoming protocol name and the state of the program. Root is
4564 allowed to force received protocol via the -oMr option above. If we have come
4565 via inetd, the process info has already been set up. We don't set
4566 received_protocol here for smtp input, as it varies according to
4567 batch/HELO/EHLO/AUTH/TLS. */
4568
4569 if (smtp_input)
4570   {
4571   if (!is_inetd) set_process_info("accepting a local %sSMTP message from <%s>",
4572     smtp_batched_input? "batched " : "",
4573     (sender_address!= NULL)? sender_address : originator_login);
4574   }
4575 else
4576   {
4577   if (received_protocol == NULL)
4578     received_protocol = string_sprintf("local%s", called_as);
4579   set_process_info("accepting a local non-SMTP message from <%s>",
4580     sender_address);
4581   }
4582
4583 /* Initialize the session_local_queue-only flag (this will be ignored if
4584 mua_wrapper is set) */
4585
4586 queue_check_only();
4587 session_local_queue_only = queue_only;
4588
4589 /* For non-SMTP and for batched SMTP input, check that there is enough space on
4590 the spool if so configured. On failure, we must not attempt to send an error
4591 message! (For interactive SMTP, the check happens at MAIL FROM and an SMTP
4592 error code is given.) */
4593
4594 if ((!smtp_input || smtp_batched_input) && !receive_check_fs(0))
4595   {
4596   fprintf(stderr, "exim: insufficient disk space\n");
4597   return EXIT_FAILURE;
4598   }
4599
4600 /* If this is smtp input of any kind, real or batched, handle the start of the
4601 SMTP session.
4602
4603 NOTE: We do *not* call smtp_log_no_mail() if smtp_start_session() fails,
4604 because a log line has already been written for all its failure exists
4605 (usually "connection refused: <reason>") and writing another one is
4606 unnecessary clutter. */
4607
4608 if (smtp_input)
4609   {
4610   smtp_in = stdin;
4611   smtp_out = stdout;
4612   if (verify_check_host(&hosts_connection_nolog) == OK)
4613     log_write_selector &= ~L_smtp_connection;
4614   log_write(L_smtp_connection, LOG_MAIN, "%s", smtp_get_connection_info());
4615   if (!smtp_start_session())
4616     {
4617     mac_smtp_fflush();
4618     exim_exit(EXIT_SUCCESS);
4619     }
4620   }
4621
4622 /* Otherwise, set up the input size limit here. */
4623
4624 else
4625   {
4626   thismessage_size_limit = expand_string_integer(message_size_limit, TRUE);
4627   if (expand_string_message != NULL)
4628     {
4629     if (thismessage_size_limit == -1)
4630       log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to expand "
4631         "message_size_limit: %s", expand_string_message);
4632     else
4633       log_write(0, LOG_MAIN|LOG_PANIC_DIE, "invalid value for "
4634         "message_size_limit: %s", expand_string_message);
4635     }
4636   }
4637
4638 /* Loop for several messages when reading SMTP input. If we fork any child
4639 processes, we don't want to wait for them unless synchronous delivery is
4640 requested, so set SIGCHLD to SIG_IGN in that case. This is not necessarily the
4641 same as SIG_DFL, despite the fact that documentation often lists the default as
4642 "ignore". This is a confusing area. This is what I know:
4643
4644 At least on some systems (e.g. Solaris), just setting SIG_IGN causes child
4645 processes that complete simply to go away without ever becoming defunct. You
4646 can't then wait for them - but we don't want to wait for them in the
4647 non-synchronous delivery case. However, this behaviour of SIG_IGN doesn't
4648 happen for all OS (e.g. *BSD is different).
4649
4650 But that's not the end of the story. Some (many? all?) systems have the
4651 SA_NOCLDWAIT option for sigaction(). This requests the behaviour that Solaris
4652 has by default, so it seems that the difference is merely one of default
4653 (compare restarting vs non-restarting signals).
4654
4655 To cover all cases, Exim sets SIG_IGN with SA_NOCLDWAIT here if it can. If not,
4656 it just sets SIG_IGN. To be on the safe side it also calls waitpid() at the end
4657 of the loop below. Paranoia rules.
4658
4659 February 2003: That's *still* not the end of the story. There are now versions
4660 of Linux (where SIG_IGN does work) that are picky. If, having set SIG_IGN, a
4661 process then calls waitpid(), a grumble is written to the system log, because
4662 this is logically inconsistent. In other words, it doesn't like the paranoia.
4663 As a consequenc of this, the waitpid() below is now excluded if we are sure
4664 that SIG_IGN works. */
4665
4666 if (!synchronous_delivery)
4667   {
4668   #ifdef SA_NOCLDWAIT
4669   struct sigaction act;
4670   act.sa_handler = SIG_IGN;
4671   sigemptyset(&(act.sa_mask));
4672   act.sa_flags = SA_NOCLDWAIT;
4673   sigaction(SIGCHLD, &act, NULL);
4674   #else
4675   signal(SIGCHLD, SIG_IGN);
4676   #endif
4677   }
4678
4679 /* Save the current store pool point, for resetting at the start of
4680 each message, and save the real sender address, if any. */
4681
4682 reset_point = store_get(0);
4683 real_sender_address = sender_address;
4684
4685 /* Loop to receive messages; receive_msg() returns TRUE if there are more
4686 messages to be read (SMTP input), or FALSE otherwise (not SMTP, or SMTP channel
4687 collapsed). */
4688
4689 while (more)
4690   {
4691   store_reset(reset_point);
4692   message_id[0] = 0;
4693
4694   /* Handle the SMTP case; call smtp_setup_mst() to deal with the initial SMTP
4695   input and build the recipients list, before calling receive_msg() to read the
4696   message proper. Whatever sender address is given in the SMTP transaction is
4697   often ignored for local senders - we use the actual sender, which is normally
4698   either the underlying user running this process or a -f argument provided by
4699   a trusted caller. It is saved in real_sender_address. The test for whether to
4700   accept the SMTP sender is encapsulated in receive_check_set_sender(). */
4701
4702   if (smtp_input)
4703     {
4704     int rc;
4705     if ((rc = smtp_setup_msg()) > 0)
4706       {
4707       if (real_sender_address != NULL &&
4708           !receive_check_set_sender(sender_address))
4709         {
4710         sender_address = raw_sender = real_sender_address;
4711         sender_address_unrewritten = NULL;
4712         }
4713
4714       /* For batched SMTP, we have to run the acl_not_smtp_start ACL, since it
4715       isn't really SMTP, so no other ACL will run until the acl_not_smtp one at
4716       the very end. The result of the ACL is ignored (as for other non-SMTP
4717       messages). It is run for its potential side effects. */
4718
4719       if (smtp_batched_input && acl_not_smtp_start != NULL)
4720         {
4721         uschar *user_msg, *log_msg;
4722         enable_dollar_recipients = TRUE;
4723         (void)acl_check(ACL_WHERE_NOTSMTP_START, NULL, acl_not_smtp_start,
4724           &user_msg, &log_msg);
4725         enable_dollar_recipients = FALSE;
4726         }
4727
4728       /* Now get the data for the message */
4729
4730       more = receive_msg(extract_recipients);
4731       if (message_id[0] == 0)
4732         {
4733         if (more) continue;
4734         smtp_log_no_mail();               /* Log no mail if configured */
4735         exim_exit(EXIT_FAILURE);
4736         }
4737       }
4738     else
4739       {
4740       smtp_log_no_mail();               /* Log no mail if configured */
4741       exim_exit((rc == 0)? EXIT_SUCCESS : EXIT_FAILURE);
4742       }
4743     }
4744
4745   /* In the non-SMTP case, we have all the information from the command
4746   line, but must process it in case it is in the more general RFC822
4747   format, and in any case, to detect syntax errors. Also, it appears that
4748   the use of comma-separated lists as single arguments is common, so we
4749   had better support them. */
4750
4751   else
4752     {
4753     int i;
4754     int rcount = 0;
4755     int count = argc - recipients_arg;
4756     uschar **list = argv + recipients_arg;
4757
4758     /* These options cannot be changed dynamically for non-SMTP messages */
4759
4760     active_local_sender_retain = local_sender_retain;
4761     active_local_from_check = local_from_check;
4762
4763     /* Save before any rewriting */
4764
4765     raw_sender = string_copy(sender_address);
4766
4767     /* Loop for each argument */
4768
4769     for (i = 0; i < count; i++)
4770       {
4771       int start, end, domain;
4772       uschar *errmess;
4773       uschar *s = list[i];
4774
4775       /* Loop for each comma-separated address */
4776
4777       while (*s != 0)
4778         {
4779         BOOL finished = FALSE;
4780         uschar *recipient;
4781         uschar *ss = parse_find_address_end(s, FALSE);
4782
4783         if (*ss == ',') *ss = 0; else finished = TRUE;
4784
4785         /* Check max recipients - if -t was used, these aren't recipients */
4786
4787         if (recipients_max > 0 && ++rcount > recipients_max &&
4788             !extract_recipients)
4789           {
4790           if (error_handling == ERRORS_STDERR)
4791             {
4792             fprintf(stderr, "exim: too many recipients\n");
4793             exim_exit(EXIT_FAILURE);
4794             }
4795           else
4796             {
4797             return
4798               moan_to_sender(ERRMESS_TOOMANYRECIP, NULL, NULL, stdin, TRUE)?
4799                 errors_sender_rc : EXIT_FAILURE;
4800             }
4801           }
4802
4803         recipient =
4804           parse_extract_address(s, &errmess, &start, &end, &domain, FALSE);
4805
4806         if (domain == 0 && !allow_unqualified_recipient)
4807           {
4808           recipient = NULL;
4809           errmess = US"unqualified recipient address not allowed";
4810           }
4811
4812         if (recipient == NULL)
4813           {
4814           if (error_handling == ERRORS_STDERR)
4815             {
4816             fprintf(stderr, "exim: bad recipient address \"%s\": %s\n",
4817               string_printing(list[i]), errmess);
4818             exim_exit(EXIT_FAILURE);
4819             }
4820           else
4821             {
4822             error_block eblock;
4823             eblock.next = NULL;
4824             eblock.text1 = string_printing(list[i]);
4825             eblock.text2 = errmess;
4826             return
4827               moan_to_sender(ERRMESS_BADARGADDRESS, &eblock, NULL, stdin, TRUE)?
4828                 errors_sender_rc : EXIT_FAILURE;
4829             }
4830           }
4831
4832         receive_add_recipient(recipient, -1);
4833         s = ss;
4834         if (!finished)
4835           while (*(++s) != 0 && (*s == ',' || isspace(*s)));
4836         }
4837       }
4838
4839     /* Show the recipients when debugging */
4840
4841     DEBUG(D_receive)
4842       {
4843       int i;
4844       if (sender_address != NULL) debug_printf("Sender: %s\n", sender_address);
4845       if (recipients_list != NULL)
4846         {
4847         debug_printf("Recipients:\n");
4848         for (i = 0; i < recipients_count; i++)
4849           debug_printf("  %s\n", recipients_list[i].address);
4850         }
4851       }
4852
4853     /* Run the acl_not_smtp_start ACL if required. The result of the ACL is
4854     ignored; rejecting here would just add complication, and it can just as
4855     well be done later. Allow $recipients to be visible in the ACL. */
4856
4857     if (acl_not_smtp_start != NULL)
4858       {
4859       uschar *user_msg, *log_msg;
4860       enable_dollar_recipients = TRUE;
4861       (void)acl_check(ACL_WHERE_NOTSMTP_START, NULL, acl_not_smtp_start,
4862         &user_msg, &log_msg);
4863       enable_dollar_recipients = FALSE;
4864       }
4865
4866     /* Read the data for the message. If filter_test is not FTEST_NONE, this
4867     will just read the headers for the message, and not write anything onto the
4868     spool. */
4869
4870     message_ended = END_NOTENDED;
4871     more = receive_msg(extract_recipients);
4872
4873     /* more is always FALSE here (not SMTP message) when reading a message
4874     for real; when reading the headers of a message for filter testing,
4875     it is TRUE if the headers were terminated by '.' and FALSE otherwise. */
4876
4877     if (message_id[0] == 0) exim_exit(EXIT_FAILURE);
4878     }  /* Non-SMTP message reception */
4879
4880   /* If this is a filter testing run, there are headers in store, but
4881   no message on the spool. Run the filtering code in testing mode, setting
4882   the domain to the qualify domain and the local part to the current user,
4883   unless they have been set by options. The prefix and suffix are left unset
4884   unless specified. The the return path is set to to the sender unless it has
4885   already been set from a return-path header in the message. */
4886
4887   if (filter_test != FTEST_NONE)
4888     {
4889     deliver_domain = (ftest_domain != NULL)?
4890       ftest_domain : qualify_domain_recipient;
4891     deliver_domain_orig = deliver_domain;
4892     deliver_localpart = (ftest_localpart != NULL)?
4893       ftest_localpart : originator_login;
4894     deliver_localpart_orig = deliver_localpart;
4895     deliver_localpart_prefix = ftest_prefix;
4896     deliver_localpart_suffix = ftest_suffix;
4897     deliver_home = originator_home;
4898
4899     if (return_path == NULL)
4900       {
4901       printf("Return-path copied from sender\n");
4902       return_path = string_copy(sender_address);
4903       }
4904     else
4905       {
4906       printf("Return-path = %s\n", (return_path[0] == 0)? US"<>" : return_path);
4907       }
4908     printf("Sender      = %s\n", (sender_address[0] == 0)? US"<>" : sender_address);
4909
4910     receive_add_recipient(
4911       string_sprintf("%s%s%s@%s",
4912         (ftest_prefix == NULL)? US"" : ftest_prefix,
4913         deliver_localpart,
4914         (ftest_suffix == NULL)? US"" : ftest_suffix,
4915         deliver_domain), -1);
4916
4917     printf("Recipient   = %s\n", recipients_list[0].address);
4918     if (ftest_prefix != NULL) printf("Prefix    = %s\n", ftest_prefix);
4919     if (ftest_suffix != NULL) printf("Suffix    = %s\n", ftest_suffix);
4920
4921     (void)chdir("/");   /* Get away from wherever the user is running this from */
4922
4923     /* Now we run either a system filter test, or a user filter test, or both.
4924     In the latter case, headers added by the system filter will persist and be
4925     available to the user filter. We need to copy the filter variables
4926     explicitly. */
4927
4928     if ((filter_test & FTEST_SYSTEM) != 0)
4929       {
4930       if (!filter_runtest(filter_sfd, filter_test_sfile, TRUE, more))
4931         exim_exit(EXIT_FAILURE);
4932       }
4933
4934     memcpy(filter_sn, filter_n, sizeof(filter_sn));
4935
4936     if ((filter_test & FTEST_USER) != 0)
4937       {
4938       if (!filter_runtest(filter_ufd, filter_test_ufile, FALSE, more))
4939         exim_exit(EXIT_FAILURE);
4940       }
4941
4942     exim_exit(EXIT_SUCCESS);
4943     }
4944
4945   /* Else act on the result of message reception. We should not get here unless
4946   message_id[0] is non-zero. If queue_only is set, session_local_queue_only
4947   will be TRUE. If it is not, check on the number of messages received in this
4948   connection. */
4949
4950   if (!session_local_queue_only &&
4951       smtp_accept_queue_per_connection > 0 &&
4952       receive_messagecount > smtp_accept_queue_per_connection)
4953     {
4954     session_local_queue_only = TRUE;
4955     queue_only_reason = 2;
4956     }
4957
4958   /* Initialize local_queue_only from session_local_queue_only. If it is false,
4959   and queue_only_load is set, check that the load average is below it. If it is
4960   not, set local_queue_only TRUE. If queue_only_load_latch is true (the
4961   default), we put the whole session into queue_only mode. It then remains this
4962   way for any subsequent messages on the same SMTP connection. This is a
4963   deliberate choice; even though the load average may fall, it doesn't seem
4964   right to deliver later messages on the same call when not delivering earlier
4965   ones. However, there are odd cases where this is not wanted, so this can be
4966   changed by setting queue_only_load_latch false. */
4967
4968   local_queue_only = session_local_queue_only;
4969   if (!local_queue_only && queue_only_load >= 0)
4970     {
4971     local_queue_only = (load_average = OS_GETLOADAVG()) > queue_only_load;
4972     if (local_queue_only)
4973       {
4974       queue_only_reason = 3;
4975       if (queue_only_load_latch) session_local_queue_only = TRUE;
4976       }
4977     }
4978
4979   /* If running as an MUA wrapper, all queueing options and freezing options
4980   are ignored. */
4981
4982   if (mua_wrapper)
4983     local_queue_only = queue_only_policy = deliver_freeze = FALSE;
4984
4985   /* Log the queueing here, when it will get a message id attached, but
4986   not if queue_only is set (case 0). Case 1 doesn't happen here (too many
4987   connections). */
4988
4989   if (local_queue_only) switch(queue_only_reason)
4990     {
4991     case 2:
4992     log_write(L_delay_delivery,
4993               LOG_MAIN, "no immediate delivery: more than %d messages "
4994       "received in one connection", smtp_accept_queue_per_connection);
4995     break;
4996
4997     case 3:
4998     log_write(L_delay_delivery,
4999               LOG_MAIN, "no immediate delivery: load average %.2f",
5000               (double)load_average/1000.0);
5001     break;
5002     }
5003
5004   /* Else do the delivery unless the ACL or local_scan() called for queue only
5005   or froze the message. Always deliver in a separate process. A fork failure is
5006   not a disaster, as the delivery will eventually happen on a subsequent queue
5007   run. The search cache must be tidied before the fork, as the parent will
5008   do it before exiting. The child will trigger a lookup failure and
5009   thereby defer the delivery if it tries to use (for example) a cached ldap
5010   connection that the parent has called unbind on. */
5011
5012   else if (!queue_only_policy && !deliver_freeze)
5013     {
5014     pid_t pid;
5015     search_tidyup();
5016
5017     if ((pid = fork()) == 0)
5018       {
5019       int rc;
5020       close_unwanted();      /* Close unwanted file descriptors and TLS */
5021       exim_nullstd();        /* Ensure std{in,out,err} exist */
5022
5023       /* Re-exec Exim if we need to regain privilege (note: in mua_wrapper
5024       mode, deliver_drop_privilege is forced TRUE). */
5025
5026       if (geteuid() != root_uid && !deliver_drop_privilege && !unprivileged)
5027         {
5028         (void)child_exec_exim(CEE_EXEC_EXIT, FALSE, NULL, FALSE, 2, US"-Mc",
5029           message_id);
5030         /* Control does not return here. */
5031         }
5032
5033       /* No need to re-exec */
5034
5035       rc = deliver_message(message_id, FALSE, FALSE);
5036       search_tidyup();
5037       _exit((!mua_wrapper || rc == DELIVER_MUA_SUCCEEDED)?
5038         EXIT_SUCCESS : EXIT_FAILURE);
5039       }
5040
5041     if (pid < 0)
5042       {
5043       log_write(0, LOG_MAIN|LOG_PANIC, "failed to fork automatic delivery "
5044         "process: %s", strerror(errno));
5045       }
5046
5047     /* In the parent, wait if synchronous delivery is required. This will
5048     always be the case in MUA wrapper mode. */
5049
5050     else if (synchronous_delivery)
5051       {
5052       int status;
5053       while (wait(&status) != pid);
5054       if ((status & 0x00ff) != 0)
5055         log_write(0, LOG_MAIN|LOG_PANIC,
5056           "process %d crashed with signal %d while delivering %s",
5057           (int)pid, status & 0x00ff, message_id);
5058       if (mua_wrapper && (status & 0xffff) != 0) exim_exit(EXIT_FAILURE);
5059       }
5060     }
5061
5062   /* The loop will repeat if more is TRUE. If we do not know know that the OS
5063   automatically reaps children (see comments above the loop), clear away any
5064   finished subprocesses here, in case there are lots of messages coming in
5065   from the same source. */
5066
5067   #ifndef SIG_IGN_WORKS
5068   while (waitpid(-1, NULL, WNOHANG) > 0);
5069   #endif
5070   }
5071
5072 exim_exit(EXIT_SUCCESS);   /* Never returns */
5073 return 0;                  /* To stop compiler warning */
5074 }
5075
5076 /* End of exim.c */