Add missing search cache tidyup before delivering message received via
[exim.git] / src / src / exim.c
1 /* $Cambridge: exim/src/src/exim.c,v 1.6 2004/10/19 11:40:52 ph10 Exp $ */
2
3 /*************************************************
4 * Exim - an Internet mail transport agent *
5 *************************************************/
6
7 /* Copyright (c) University of Cambridge 1995 - 2004 */
8 /* See the file NOTICE for conditions of use and distribution. */
9
10
11 /* The main function: entry point, initialization, and high-level control.
12 Also a few functions that don't naturally fit elsewhere. */
13
14
15 #include "exim.h"
16
17
18
19 /*************************************************
20 * Function interface to store functions *
21 *************************************************/
22
23 /* We need some real functions to pass to the PCRE regular expression library
24 for store allocation via Exim's store manager. The normal calls are actually
25 macros that pass over location information to make tracing easier. These
26 functions just interface to the standard macro calls. A good compiler will
27 optimize out the tail recursion and so not make them too expensive. There
28 are two sets of functions; one for use when we want to retain the compiled
29 regular expression for a long time; the other for short-term use. */
30
31 static void *
32 function_store_get(size_t size)
33 {
34 return store_get((int)size);
35 }
36
37 static void
38 function_dummy_free(void *block) { block = block; }
39
40 static void *
41 function_store_malloc(size_t size)
42 {
43 return store_malloc((int)size);
44 }
45
46 static void
47 function_store_free(void *block)
48 {
49 store_free(block);
50 }
51
52
53
54
55 /*************************************************
56 * Compile regular expression and panic on fail *
57 *************************************************/
58
59 /* This function is called when failure to compile a regular expression leads
60 to a panic exit. In other cases, pcre_compile() is called directly. In many
61 cases where this function is used, the results of the compilation are to be
62 placed in long-lived store, so we temporarily reset the store management
63 functions that PCRE uses if the use_malloc flag is set.
64
65 Argument:
66 pattern the pattern to compile
67 caseless TRUE if caseless matching is required
68 use_malloc TRUE if compile into malloc store
69
70 Returns: pointer to the compiled pattern
71 */
72
73 const pcre *
74 regex_must_compile(uschar *pattern, BOOL caseless, BOOL use_malloc)
75 {
76 int offset;
77 int options = PCRE_COPT;
78 const pcre *yield;
79 const uschar *error;
80 if (use_malloc)
81 {
82 pcre_malloc = function_store_malloc;
83 pcre_free = function_store_free;
84 }
85 if (caseless) options |= PCRE_CASELESS;
86 yield = pcre_compile(CS pattern, options, (const char **)&error, &offset, NULL);
87 pcre_malloc = function_store_get;
88 pcre_free = function_dummy_free;
89 if (yield == NULL)
90 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "regular expression error: "
91 "%s at offset %d while compiling %s", error, offset, pattern);
92 return yield;
93 }
94
95
96
97
98 /*************************************************
99 * Execute regular expression and set strings *
100 *************************************************/
101
102 /* This function runs a regular expression match, and sets up the pointers to
103 the matched substrings.
104
105 Arguments:
106 re the compiled expression
107 subject the subject string
108 options additional PCRE options
109 setup if < 0 do full setup
110 if >= 0 setup from setup+1 onwards,
111 excluding the full matched string
112
113 Returns: TRUE or FALSE
114 */
115
116 BOOL
117 regex_match_and_setup(const pcre *re, uschar *subject, int options, int setup)
118 {
119 int ovector[3*(EXPAND_MAXN+1)];
120 int n = pcre_exec(re, NULL, CS subject, Ustrlen(subject), 0,
121 PCRE_EOPT | options, ovector, sizeof(ovector)/sizeof(int));
122 BOOL yield = n >= 0;
123 if (n == 0) n = EXPAND_MAXN + 1;
124 if (yield)
125 {
126 int nn;
127 expand_nmax = (setup < 0)? 0 : setup + 1;
128 for (nn = (setup < 0)? 0 : 2; nn < n*2; nn += 2)
129 {
130 expand_nstring[expand_nmax] = subject + ovector[nn];
131 expand_nlength[expand_nmax++] = ovector[nn+1] - ovector[nn];
132 }
133 expand_nmax--;
134 }
135 return yield;
136 }
137
138
139
140
141 /*************************************************
142 * Handler for SIGUSR1 *
143 *************************************************/
144
145 /* SIGUSR1 causes any exim process to write to the process log details of
146 what it is currently doing. It will only be used if the OS is capable of
147 setting up a handler that causes automatic restarting of any system call
148 that is in progress at the time.
149
150 Argument: the signal number (SIGUSR1)
151 Returns: nothing
152 */
153
154 static void
155 usr1_handler(int sig)
156 {
157 sig = sig; /* Keep picky compilers happy */
158 log_write(0, LOG_PROCESS, "%s", process_info);
159 log_close_all();
160 os_restarting_signal(SIGUSR1, usr1_handler);
161 }
162
163
164
165 /*************************************************
166 * Timeout handler *
167 *************************************************/
168
169 /* This handler is enabled most of the time that Exim is running. The handler
170 doesn't actually get used unless alarm() has been called to set a timer, to
171 place a time limit on a system call of some kind. When the handler is run, it
172 re-enables itself.
173
174 There are some other SIGALRM handlers that are used in special cases when more
175 than just a flag setting is required; for example, when reading a message's
176 input. These are normally set up in the code module that uses them, and the
177 SIGALRM handler is reset to this one afterwards.
178
179 Argument: the signal value (SIGALRM)
180 Returns: nothing
181 */
182
183 void
184 sigalrm_handler(int sig)
185 {
186 sig = sig; /* Keep picky compilers happy */
187 sigalrm_seen = TRUE;
188 os_non_restarting_signal(SIGALRM, sigalrm_handler);
189 }
190
191
192
193 /*************************************************
194 * Sleep for a fractional time interval *
195 *************************************************/
196
197 /* This function is called by millisleep() and exim_wait_tick() to wait for a
198 period of time that may include a fraction of a second. The coding is somewhat
199 tedious. We do not expect setitimer() ever to fail, but if it does, the process
200 will wait for ever, so we panic in this instance. (There was a case of this
201 when a bug in a function that calls milliwait() caused it to pass invalid data.
202 That's when I added the check. :-)
203
204 Argument: an itimerval structure containing the interval
205 Returns: nothing
206 */
207
208 static void
209 milliwait(struct itimerval *itval)
210 {
211 sigset_t sigmask;
212 sigset_t old_sigmask;
213 (void)sigemptyset(&sigmask); /* Empty mask */
214 (void)sigaddset(&sigmask, SIGALRM); /* Add SIGALRM */
215 (void)sigprocmask(SIG_BLOCK, &sigmask, &old_sigmask); /* Block SIGALRM */
216 if (setitimer(ITIMER_REAL, itval, NULL) < 0) /* Start timer */
217 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
218 "setitimer() failed: %s", strerror(errno));
219 (void)sigfillset(&sigmask); /* All signals */
220 (void)sigdelset(&sigmask, SIGALRM); /* Remove SIGALRM */
221 (void)sigsuspend(&sigmask); /* Until SIGALRM */
222 (void)sigprocmask(SIG_SETMASK, &old_sigmask, NULL); /* Restore mask */
223 }
224
225
226
227
228 /*************************************************
229 * Millisecond sleep function *
230 *************************************************/
231
232 /* The basic sleep() function has a granularity of 1 second, which is too rough
233 in some cases - for example, when using an increasing delay to slow down
234 spammers.
235
236 Argument: number of millseconds
237 Returns: nothing
238 */
239
240 void
241 millisleep(int msec)
242 {
243 struct itimerval itval;
244 itval.it_interval.tv_sec = 0;
245 itval.it_interval.tv_usec = 0;
246 itval.it_value.tv_sec = msec/1000;
247 itval.it_value.tv_usec = (msec % 1000) * 1000;
248 milliwait(&itval);
249 }
250
251
252
253 /*************************************************
254 * Compare microsecond times *
255 *************************************************/
256
257 /*
258 Arguments:
259 tv1 the first time
260 tv2 the second time
261
262 Returns: -1, 0, or +1
263 */
264
265 int
266 exim_tvcmp(struct timeval *t1, struct timeval *t2)
267 {
268 if (t1->tv_sec > t2->tv_sec) return +1;
269 if (t1->tv_sec < t2->tv_sec) return -1;
270 if (t1->tv_usec > t2->tv_usec) return +1;
271 if (t1->tv_usec < t2->tv_usec) return -1;
272 return 0;
273 }
274
275
276
277
278 /*************************************************
279 * Clock tick wait function *
280 *************************************************/
281
282 /* Exim uses a time + a pid to generate a unique identifier in two places: its
283 message IDs, and in file names for maildir deliveries. Because some OS now
284 re-use pids within the same second, sub-second times are now being used.
285 However, for absolute certaintly, we must ensure the clock has ticked before
286 allowing the relevant process to complete. At the time of implementation of
287 this code (February 2003), the speed of processors is such that the clock will
288 invariably have ticked already by the time a process has done its job. This
289 function prepares for the time when things are faster - and it also copes with
290 clocks that go backwards.
291
292 Arguments:
293 then_tv A timeval which was used to create uniqueness; its usec field
294 has been rounded down to the value of the resolution.
295 We want to be sure the current time is greater than this.
296 resolution The resolution that was used to divide the microseconds
297 (1 for maildir, larger for message ids)
298
299 Returns: nothing
300 */
301
302 void
303 exim_wait_tick(struct timeval *then_tv, int resolution)
304 {
305 struct timeval now_tv;
306 long int now_true_usec;
307
308 (void)gettimeofday(&now_tv, NULL);
309 now_true_usec = now_tv.tv_usec;
310 now_tv.tv_usec = (now_true_usec/resolution) * resolution;
311
312 if (exim_tvcmp(&now_tv, then_tv) <= 0)
313 {
314 struct itimerval itval;
315 itval.it_interval.tv_sec = 0;
316 itval.it_interval.tv_usec = 0;
317 itval.it_value.tv_sec = then_tv->tv_sec - now_tv.tv_sec;
318 itval.it_value.tv_usec = then_tv->tv_usec + resolution - now_true_usec;
319
320 /* We know that, overall, "now" is less than or equal to "then". Therefore, a
321 negative value for the microseconds is possible only in the case when "now"
322 is more than a second less than "then". That means that itval.it_value.tv_sec
323 is greater than zero. The following correction is therefore safe. */
324
325 if (itval.it_value.tv_usec < 0)
326 {
327 itval.it_value.tv_usec += 1000000;
328 itval.it_value.tv_sec -= 1;
329 }
330
331 DEBUG(D_transport|D_receive)
332 {
333 if (!running_in_test_harness)
334 {
335 debug_printf("tick check: %lu.%06lu %lu.%06lu\n",
336 then_tv->tv_sec, then_tv->tv_usec, now_tv.tv_sec, now_tv.tv_usec);
337 debug_printf("waiting %lu.%06lu\n", itval.it_value.tv_sec,
338 itval.it_value.tv_usec);
339 }
340 }
341
342 milliwait(&itval);
343 }
344 }
345
346
347
348
349 /*************************************************
350 * Set up processing details *
351 *************************************************/
352
353 /* Save a text string for dumping when SIGUSR1 is received.
354 Do checks for overruns.
355
356 Arguments: format and arguments, as for printf()
357 Returns: nothing
358 */
359
360 void
361 set_process_info(char *format, ...)
362 {
363 int len;
364 va_list ap;
365 sprintf(CS process_info, "%5d ", (int)getpid());
366 len = Ustrlen(process_info);
367 va_start(ap, format);
368 if (!string_vformat(process_info + len, PROCESS_INFO_SIZE - len, format, ap))
369 Ustrcpy(process_info + len, "**** string overflowed buffer ****");
370 DEBUG(D_process_info) debug_printf("set_process_info: %s\n", process_info);
371 va_end(ap);
372 }
373
374
375
376
377
378 /*************************************************
379 * Ensure stdin, stdout, and stderr exist *
380 *************************************************/
381
382 /* Some operating systems grumble if an exec() happens without a standard
383 input, output, and error (fds 0, 1, 2) being defined. The worry is that some
384 file will be opened and will use these fd values, and then some other bit of
385 code will assume, for example, that it can write error messages to stderr.
386 This function ensures that fds 0, 1, and 2 are open if they do not already
387 exist, by connecting them to /dev/null.
388
389 This function is also used to ensure that std{in,out,err} exist at all times,
390 so that if any library that Exim calls tries to use them, it doesn't crash.
391
392 Arguments: None
393 Returns: Nothing
394 */
395
396 void
397 exim_nullstd(void)
398 {
399 int i;
400 int devnull = -1;
401 struct stat statbuf;
402 for (i = 0; i <= 2; i++)
403 {
404 if (fstat(i, &statbuf) < 0 && errno == EBADF)
405 {
406 if (devnull < 0) devnull = open("/dev/null", O_RDWR);
407 if (devnull < 0) log_write(0, LOG_MAIN|LOG_PANIC_DIE, "%s",
408 string_open_failed(errno, "/dev/null"));
409 if (devnull != i) dup2(devnull, i);
410 }
411 }
412 if (devnull > 2) close(devnull);
413 }
414
415
416
417
418 /*************************************************
419 * Close unwanted file descriptors for delivery *
420 *************************************************/
421
422 /* This function is called from a new process that has been forked to deliver
423 an incoming message, either directly, or using exec.
424
425 We want any smtp input streams to be closed in this new process. However, it
426 has been observed that using fclose() here causes trouble. When reading in -bS
427 input, duplicate copies of messages have been seen. The files will be sharing a
428 file pointer with the parent process, and it seems that fclose() (at least on
429 some systems - I saw this on Solaris 2.5.1) messes with that file pointer, at
430 least sometimes. Hence we go for closing the underlying file descriptors.
431
432 If TLS is active, we want to shut down the TLS library, but without molesting
433 the parent's SSL connection.
434
435 For delivery of a non-SMTP message, we want to close stdin and stdout (and
436 stderr unless debugging) because the calling process might have set them up as
437 pipes and be waiting for them to close before it waits for the submission
438 process to terminate. If they aren't closed, they hold up the calling process
439 until the initial delivery process finishes, which is not what we want.
440
441 Exception: We do want it for synchronous delivery!
442
443 And notwithstanding all the above, if D_resolver is set, implying resolver
444 debugging, leave stdout open, because that's where the resolver writes its
445 debugging output.
446
447 When we close stderr (which implies we've also closed stdout), we also get rid
448 of any controlling terminal.
449
450 Arguments: None
451 Returns: Nothing
452 */
453
454 static void
455 close_unwanted(void)
456 {
457 if (smtp_input)
458 {
459 #ifdef SUPPORT_TLS
460 tls_close(FALSE); /* Shut down the TLS library */
461 #endif
462 close(fileno(smtp_in));
463 close(fileno(smtp_out));
464 smtp_in = NULL;
465 }
466 else
467 {
468 close(0); /* stdin */
469 if ((debug_selector & D_resolver) == 0) close(1); /* stdout */
470 if (debug_selector == 0) /* stderr */
471 {
472 if (!synchronous_delivery)
473 {
474 close(2);
475 log_stderr = NULL;
476 }
477 (void)setsid();
478 }
479 }
480 }
481
482
483
484
485 /*************************************************
486 * Set uid and gid *
487 *************************************************/
488
489 /* This function sets a new uid and gid permanently, optionally calling
490 initgroups() to set auxiliary groups. There are some special cases when running
491 Exim in unprivileged modes. In these situations the effective uid will not be
492 root; if we already have the right effective uid/gid, and don't need to
493 initialize any groups, leave things as they are.
494
495 Arguments:
496 uid the uid
497 gid the gid
498 igflag TRUE if initgroups() wanted
499 msg text to use in debugging output and failure log
500
501 Returns: nothing; bombs out on failure
502 */
503
504 void
505 exim_setugid(uid_t uid, gid_t gid, BOOL igflag, uschar *msg)
506 {
507 uid_t euid = geteuid();
508 gid_t egid = getegid();
509
510 if (euid == root_uid || euid != uid || egid != gid || igflag)
511 {
512 /* At least one OS returns +1 for initgroups failure, so just check for
513 non-zero. */
514
515 if (igflag)
516 {
517 struct passwd *pw = getpwuid(uid);
518 if (pw != NULL)
519 {
520 if (initgroups(pw->pw_name, gid) != 0)
521 log_write(0,LOG_MAIN|LOG_PANIC_DIE,"initgroups failed for uid=%ld: %s",
522 (long int)uid, strerror(errno));
523 }
524 else log_write(0, LOG_MAIN|LOG_PANIC_DIE, "cannot run initgroups(): "
525 "no passwd entry for uid=%ld", (long int)uid);
526 }
527
528 if (setgid(gid) < 0 || setuid(uid) < 0)
529 {
530 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "unable to set gid=%ld or uid=%ld "
531 "(euid=%ld): %s", (long int)gid, (long int)uid, (long int)euid, msg);
532 }
533 }
534
535 /* Debugging output included uid/gid and all groups */
536
537 DEBUG(D_uid)
538 {
539 int group_count;
540 gid_t group_list[NGROUPS_MAX];
541 debug_printf("changed uid/gid: %s\n uid=%ld gid=%ld pid=%ld\n", msg,
542 (long int)geteuid(), (long int)getegid(), (long int)getpid());
543 group_count = getgroups(NGROUPS_MAX, group_list);
544 debug_printf(" auxiliary group list:");
545 if (group_count > 0)
546 {
547 int i;
548 for (i = 0; i < group_count; i++) debug_printf(" %d", (int)group_list[i]);
549 }
550 else debug_printf(" <none>");
551 debug_printf("\n");
552 }
553 }
554
555
556
557
558 /*************************************************
559 * Exit point *
560 *************************************************/
561
562 /* Exim exits via this function so that it always clears up any open
563 databases.
564
565 Arguments:
566 rc return code
567
568 Returns: does not return
569 */
570
571 void
572 exim_exit(int rc)
573 {
574 search_tidyup();
575 DEBUG(D_any)
576 debug_printf(">>>>>>>>>>>>>>>> Exim pid=%d terminating with rc=%d "
577 ">>>>>>>>>>>>>>>>\n", (int)getpid(), rc);
578 exit(rc);
579 }
580
581
582
583
584 /*************************************************
585 * Extract port from host address *
586 *************************************************/
587
588 /* Called to extract the port from the values given to -oMa and -oMi.
589 It also checks the syntax of the address.
590
591 Argument:
592 address the address, with possible port on the end
593
594 Returns: the port, or zero if there isn't one
595 bombs out on a syntax error
596 */
597
598 static int
599 check_port(uschar *address)
600 {
601 int port = host_extract_port(address);
602 if (!string_is_ip_address(address, NULL))
603 {
604 fprintf(stderr, "exim abandoned: \"%s\" is not an IP address\n", address);
605 exit(EXIT_FAILURE);
606 }
607 return port;
608 }
609
610
611
612 /*************************************************
613 * Test/verify an address *
614 *************************************************/
615
616 /* This function is called by the -bv and -bt code. It extracts a working
617 address from a full RFC 822 address. This isn't really necessary per se, but it
618 has the effect of collapsing source routes.
619
620 Arguments:
621 s the address string
622 flags flag bits for verify_address()
623 exit_value to be set for failures
624
625 Returns: nothint
626 */
627
628 static void
629 test_address(uschar *s, int flags, int *exit_value)
630 {
631 int start, end, domain;
632 uschar *parse_error = NULL;
633 uschar *address = parse_extract_address(s, &parse_error, &start, &end, &domain,
634 FALSE);
635 if (address == NULL)
636 {
637 fprintf(stdout, "syntax error: %s\n", parse_error);
638 *exit_value = 2;
639 }
640 else
641 {
642 int rc = verify_address(deliver_make_addr(address,TRUE), stdout, flags, -1,
643 -1, NULL, NULL, NULL);
644 if (rc == FAIL) *exit_value = 2;
645 else if (rc == DEFER && *exit_value == 0) *exit_value = 1;
646 }
647 }
648
649
650
651 /*************************************************
652 * Decode bit settings for log/debug *
653 *************************************************/
654
655 /* This function decodes a string containing bit settings in the form of +name
656 and/or -name sequences, and sets/unsets bits in a bit string accordingly. It
657 also recognizes a numeric setting of the form =<number>, but this is not
658 intended for user use. It's an easy way for Exim to pass the debug settings
659 when it is re-exec'ed.
660
661 The log options are held in two unsigned ints (because there became too many
662 for one). The top bit in the table means "put in 2nd selector". This does not
663 yet apply to debug options, so the "=" facility sets only the first selector.
664
665 A bad value for a debug setting is treated as an unknown option - error message
666 to stderr and die. For log settings, which come from the configuration file,
667 we write to the log on the way out...
668
669 Arguments:
670 selector1 address of the first bit string
671 selector2 address of the second bit string, or NULL
672 string the configured string
673 options the table of option names
674 count size of table
675 which "log" or "debug"
676
677 Returns: nothing on success - bomb out on failure
678 */
679
680 static void
681 decode_bits(unsigned int *selector1, unsigned int *selector2, uschar *string,
682 bit_table *options, int count, uschar *which)
683 {
684 uschar *errmsg;
685 if (string == NULL) return;
686
687 if (*string == '=')
688 {
689 char *end; /* Not uschar */
690 *selector1 = strtoul(CS string+1, &end, 0);
691 if (*end == 0) return;
692 errmsg = string_sprintf("malformed numeric %s_selector setting: %s", which,
693 string);
694 goto ERROR_RETURN;
695 }
696
697 /* Handle symbolic setting */
698
699 else for(;;)
700 {
701 BOOL adding;
702 uschar *s;
703 int len;
704 bit_table *start, *end;
705
706 while (isspace(*string)) string++;
707 if (*string == 0) return;
708
709 if (*string != '+' && *string != '-')
710 {
711 errmsg = string_sprintf("malformed %s_selector setting: "
712 "+ or - expected but found \"%s\"", which, string);
713 goto ERROR_RETURN;
714 }
715
716 adding = *string++ == '+';
717 s = string;
718 while (isalnum(*string) || *string == '_') string++;
719 len = string - s;
720
721 start = options;
722 end = options + count;
723
724 while (start < end)
725 {
726 bit_table *middle = start + (end - start)/2;
727 int c = Ustrncmp(s, middle->name, len);
728 if (c == 0)
729 {
730 if (middle->name[len] != 0) c = -1; else
731 {
732 unsigned int bit = middle->bit;
733 unsigned int *selector;
734
735 /* The value with all bits set means "set all bits in both selectors"
736 in the case where two are being handled. However, the top bit in the
737 second selector is never set. */
738
739 if (bit == 0xffffffff)
740 {
741 *selector1 = adding? bit : 0;
742 if (selector2 != NULL) *selector2 = adding? 0x7fffffff : 0;
743 }
744
745 /* Otherwise, the 0x80000000 bit means "this value, without the top
746 bit, belongs in the second selector". */
747
748 else
749 {
750 if ((bit & 0x80000000) != 0)
751 {
752 selector = selector2;
753 bit &= 0x7fffffff;
754 }
755 else selector = selector1;
756 if (adding) *selector |= bit; else *selector &= ~bit;
757 }
758 break; /* Out of loop to match selector name */
759 }
760 }
761 if (c < 0) end = middle; else start = middle + 1;
762 } /* Loop to match selector name */
763
764 if (start >= end)
765 {
766 errmsg = string_sprintf("unknown %s_selector setting: %c%.*s", which,
767 adding? '+' : '-', len, s);
768 goto ERROR_RETURN;
769 }
770 } /* Loop for selector names */
771
772 /* Handle disasters */
773
774 ERROR_RETURN:
775 if (Ustrcmp(which, "debug") == 0)
776 {
777 fprintf(stderr, "exim: %s\n", errmsg);
778 exit(EXIT_FAILURE);
779 }
780 else log_write(0, LOG_CONFIG|LOG_PANIC_DIE, "%s", errmsg);
781 }
782
783
784
785 /*************************************************
786 * Show supported features *
787 *************************************************/
788
789 /* This function is called for -bV and for -d to output the optional features
790 of the current Exim binary.
791
792 Arguments: a FILE for printing
793 Returns: nothing
794 */
795
796 static void
797 show_whats_supported(FILE *f)
798 {
799 #ifdef DB_VERSION_STRING
800 fprintf(f, "Berkeley DB: %s\n", DB_VERSION_STRING);
801 #elif defined(BTREEVERSION) && defined(HASHVERSION)
802 #ifdef USE_DB
803 fprintf(f, "Probably Berkeley DB version 1.8x (native mode)\n");
804 #else
805 fprintf(f, "Probably Berkeley DB version 1.8x (compatibility mode)\n");
806 #endif
807 #elif defined(_DBM_RDONLY) || defined(dbm_dirfno)
808 fprintf(f, "Probably ndbm\n");
809 #elif defined(USE_TDB)
810 fprintf(f, "Using tdb\n");
811 #else
812 #ifdef USE_GDBM
813 fprintf(f, "Probably GDBM (native mode)\n");
814 #else
815 fprintf(f, "Probably GDBM (compatibility mode)\n");
816 #endif
817 #endif
818
819 fprintf(f, "Support for:");
820 #if HAVE_ICONV
821 fprintf(f, " iconv()");
822 #endif
823 #if HAVE_IPV6
824 fprintf(f, " IPv6");
825 #endif
826 #ifdef SUPPORT_PAM
827 fprintf(f, " PAM");
828 #endif
829 #ifdef EXIM_PERL
830 fprintf(f, " Perl");
831 #endif
832 #ifdef USE_TCP_WRAPPERS
833 fprintf(f, " TCPwrappers");
834 #endif
835 #ifdef SUPPORT_TLS
836 #ifdef USE_GNUTLS
837 fprintf(f, " GnuTLS");
838 #else
839 fprintf(f, " OpenSSL");
840 #endif
841 #endif
842 fprintf(f, "\n");
843
844 fprintf(f, "Lookups:");
845 #ifdef LOOKUP_LSEARCH
846 fprintf(f, " lsearch wildlsearch nwildlsearch iplsearch");
847 #endif
848 #ifdef LOOKUP_CDB
849 fprintf(f, " cdb");
850 #endif
851 #ifdef LOOKUP_DBM
852 fprintf(f, " dbm dbmnz");
853 #endif
854 #ifdef LOOKUP_DNSDB
855 fprintf(f, " dnsdb");
856 #endif
857 #ifdef LOOKUP_DSEARCH
858 fprintf(f, " dsearch");
859 #endif
860 #ifdef LOOKUP_IBASE
861 fprintf(f, " ibase");
862 #endif
863 #ifdef LOOKUP_LDAP
864 fprintf(f, " ldap ldapdn ldapm");
865 #endif
866 #ifdef LOOKUP_MYSQL
867 fprintf(f, " mysql");
868 #endif
869 #ifdef LOOKUP_NIS
870 fprintf(f, " nis nis0");
871 #endif
872 #ifdef LOOKUP_NISPLUS
873 fprintf(f, " nisplus");
874 #endif
875 #ifdef LOOKUP_ORACLE
876 fprintf(f, " oracle");
877 #endif
878 #ifdef LOOKUP_PASSWD
879 fprintf(f, " passwd");
880 #endif
881 #ifdef LOOKUP_PGSQL
882 fprintf(f, " pgsql");
883 #endif
884 #ifdef LOOKUP_TESTDB
885 fprintf(f, " testdb");
886 #endif
887 #ifdef LOOKUP_WHOSON
888 fprintf(f, " whoson");
889 #endif
890 fprintf(f, "\n");
891
892 fprintf(f, "Authenticators:");
893 #ifdef AUTH_CRAM_MD5
894 fprintf(f, " cram_md5");
895 #endif
896 #ifdef AUTH_CYRUS_SASL
897 fprintf(f, " cyrus_sasl");
898 #endif
899 #ifdef AUTH_PLAINTEXT
900 fprintf(f, " plaintext");
901 #endif
902 #ifdef AUTH_SPA
903 fprintf(f, " spa");
904 #endif
905 fprintf(f, "\n");
906
907 fprintf(f, "Routers:");
908 #ifdef ROUTER_ACCEPT
909 fprintf(f, " accept");
910 #endif
911 #ifdef ROUTER_DNSLOOKUP
912 fprintf(f, " dnslookup");
913 #endif
914 #ifdef ROUTER_IPLITERAL
915 fprintf(f, " ipliteral");
916 #endif
917 #ifdef ROUTER_IPLOOKUP
918 fprintf(f, " iplookup");
919 #endif
920 #ifdef ROUTER_MANUALROUTE
921 fprintf(f, " manualroute");
922 #endif
923 #ifdef ROUTER_QUERYPROGRAM
924 fprintf(f, " queryprogram");
925 #endif
926 #ifdef ROUTER_REDIRECT
927 fprintf(f, " redirect");
928 #endif
929 fprintf(f, "\n");
930
931 fprintf(f, "Transports:");
932 #ifdef TRANSPORT_APPENDFILE
933 fprintf(f, " appendfile");
934 #ifdef SUPPORT_MAILDIR
935 fprintf(f, "/maildir");
936 #endif
937 #ifdef SUPPORT_MAILSTORE
938 fprintf(f, "/mailstore");
939 #endif
940 #ifdef SUPPORT_MBX
941 fprintf(f, "/mbx");
942 #endif
943 #endif
944 #ifdef TRANSPORT_AUTOREPLY
945 fprintf(f, " autoreply");
946 #endif
947 #ifdef TRANSPORT_LMTP
948 fprintf(f, " lmtp");
949 #endif
950 #ifdef TRANSPORT_PIPE
951 fprintf(f, " pipe");
952 #endif
953 #ifdef TRANSPORT_SMTP
954 fprintf(f, " smtp");
955 #endif
956 fprintf(f, "\n");
957
958 if (fixed_never_users[0] > 0)
959 {
960 int i;
961 fprintf(f, "Fixed never_users: ");
962 for (i = 1; i <= (int)fixed_never_users[0] - 1; i++)
963 fprintf(f, "%d:", (unsigned int)fixed_never_users[i]);
964 fprintf(f, "%d\n", (unsigned int)fixed_never_users[i]);
965 }
966 }
967
968
969
970
971 /*************************************************
972 * Quote a local part *
973 *************************************************/
974
975 /* This function is used when a sender address or a From: or Sender: header
976 line is being created from the caller's login, or from an authenticated_id. It
977 applies appropriate quoting rules for a local part.
978
979 Argument: the local part
980 Returns: the local part, quoted if necessary
981 */
982
983 uschar *
984 local_part_quote(uschar *lpart)
985 {
986 BOOL needs_quote = FALSE;
987 int size, ptr;
988 uschar *yield;
989 uschar *t;
990
991 for (t = lpart; !needs_quote && *t != 0; t++)
992 {
993 needs_quote = !isalnum(*t) && strchr("!#$%&'*+-/=?^_`{|}~", *t) == NULL &&
994 (*t != '.' || t == lpart || t[1] == 0);
995 }
996
997 if (!needs_quote) return lpart;
998
999 size = ptr = 0;
1000 yield = string_cat(NULL, &size, &ptr, US"\"", 1);
1001
1002 for (;;)
1003 {
1004 uschar *nq = US Ustrpbrk(lpart, "\\\"");
1005 if (nq == NULL)
1006 {
1007 yield = string_cat(yield, &size, &ptr, lpart, Ustrlen(lpart));
1008 break;
1009 }
1010 yield = string_cat(yield, &size, &ptr, lpart, nq - lpart);
1011 yield = string_cat(yield, &size, &ptr, US"\\", 1);
1012 yield = string_cat(yield, &size, &ptr, nq, 1);
1013 lpart = nq + 1;
1014 }
1015
1016 yield = string_cat(yield, &size, &ptr, US"\"", 1);
1017 yield[ptr] = 0;
1018 return yield;
1019 }
1020
1021
1022
1023 #ifdef USE_READLINE
1024 /*************************************************
1025 * Load readline() functions *
1026 *************************************************/
1027
1028 /* This function is called from testing executions that read data from stdin,
1029 but only when running as the calling user. Currently, only -be does this. The
1030 function loads the readline() function library and passes back the functions.
1031 On some systems, it needs the curses library, so load that too, but try without
1032 it if loading fails. All this functionality has to be requested at build time.
1033
1034 Arguments:
1035 fn_readline_ptr pointer to where to put the readline pointer
1036 fn_addhist_ptr pointer to where to put the addhistory function
1037
1038 Returns: the dlopen handle or NULL on failure
1039 */
1040
1041 static void *
1042 set_readline(char * (**fn_readline_ptr)(char *),
1043 char * (**fn_addhist_ptr)(char *))
1044 {
1045 void *dlhandle;
1046 void *dlhandle_curses = dlopen("libcurses.so", RTLD_GLOBAL|RTLD_LAZY);
1047
1048 dlhandle = dlopen("libreadline.so", RTLD_GLOBAL|RTLD_NOW);
1049 if (dlhandle_curses != NULL) dlclose(dlhandle_curses);
1050
1051 if (dlhandle != NULL)
1052 {
1053 *fn_readline_ptr = (char *(*)(char*))dlsym(dlhandle, "readline");
1054 *fn_addhist_ptr = (char *(*)(char*))dlsym(dlhandle, "add_history");
1055 }
1056 else
1057 {
1058 DEBUG(D_any) debug_printf("failed to load readline: %s\n", dlerror());
1059 }
1060
1061 return dlhandle;
1062 }
1063 #endif
1064
1065
1066
1067 /*************************************************
1068 * Get a line from stdin for testing things *
1069 *************************************************/
1070
1071 /* This function is called when running tests that can take a number of lines
1072 of input (for example, -be and -bt). It handles continuations and trailing
1073 spaces. And prompting and a blank line output on eof. If readline() is in use,
1074 the arguments are non-NULL and provide the relevant functions.
1075
1076 Arguments:
1077 fn_readline readline function or NULL
1078 fn_addhist addhist function or NULL
1079
1080 Returns: pointer to dynamic memory, or NULL at end of file
1081 */
1082
1083 static uschar *
1084 get_stdinput(char *(*fn_readline)(char *), char *(*fn_addhist)(char *))
1085 {
1086 int i;
1087 int size = 0;
1088 int ptr = 0;
1089 uschar *yield = NULL;
1090
1091 if (fn_readline == NULL) printf("> ");
1092
1093 for (i = 0;; i++)
1094 {
1095 uschar buffer[1024];
1096 uschar *p, *ss;
1097
1098 #ifdef USE_READLINE
1099 char *readline_line = NULL;
1100 if (fn_readline != NULL)
1101 {
1102 if ((readline_line = fn_readline((i > 0)? "":"> ")) == NULL) break;
1103 if (*readline_line != 0 && fn_addhist != NULL) fn_addhist(readline_line);
1104 p = US readline_line;
1105 }
1106 else
1107 #endif
1108
1109 /* readline() not in use */
1110
1111 {
1112 if (Ufgets(buffer, sizeof(buffer), stdin) == NULL) break;
1113 p = buffer;
1114 }
1115
1116 /* Handle the line */
1117
1118 ss = p + (int)Ustrlen(p);
1119 while (ss > p && isspace(ss[-1])) ss--;
1120
1121 if (i > 0)
1122 {
1123 while (p < ss && isspace(*p)) p++; /* leading space after cont */
1124 }
1125
1126 yield = string_cat(yield, &size, &ptr, p, ss - p);
1127
1128 #ifdef USE_READLINE
1129 if (fn_readline != NULL) free(readline_line);
1130 #endif
1131
1132 if (ss == p || yield[ptr-1] != '\\')
1133 {
1134 yield[ptr] = 0;
1135 break;
1136 }
1137 yield[--ptr] = 0;
1138 }
1139
1140 if (yield == NULL) printf("\n");
1141 return yield;
1142 }
1143
1144
1145
1146 /*************************************************
1147 * Entry point and high-level code *
1148 *************************************************/
1149
1150 /* Entry point for the Exim mailer. Analyse the arguments and arrange to take
1151 the appropriate action. All the necessary functions are present in the one
1152 binary. I originally thought one should split it up, but it turns out that so
1153 much of the apparatus is needed in each chunk that one might as well just have
1154 it all available all the time, which then makes the coding easier as well.
1155
1156 Arguments:
1157 argc count of entries in argv
1158 argv argument strings, with argv[0] being the program name
1159
1160 Returns: EXIT_SUCCESS if terminated successfully
1161 EXIT_FAILURE otherwise, except when a message has been sent
1162 to the sender, and -oee was given
1163 */
1164
1165 int
1166 main(int argc, char **cargv)
1167 {
1168 uschar **argv = USS cargv;
1169 int arg_receive_timeout = -1;
1170 int arg_smtp_receive_timeout = -1;
1171 int arg_error_handling = error_handling;
1172 int filter_fd = -1;
1173 int group_count;
1174 int i;
1175 int list_queue_option = 0;
1176 int msg_action = 0;
1177 int msg_action_arg = -1;
1178 int namelen = (argv[0] == NULL)? 0 : Ustrlen(argv[0]);
1179 int queue_only_reason = 0;
1180 #ifdef EXIM_PERL
1181 int perl_start_option = 0;
1182 #endif
1183 int recipients_arg = argc;
1184 int sender_address_domain = 0;
1185 int test_retry_arg = -1;
1186 int test_rewrite_arg = -1;
1187 BOOL arg_queue_only = FALSE;
1188 BOOL bi_option = FALSE;
1189 BOOL checking = FALSE;
1190 BOOL count_queue = FALSE;
1191 BOOL expansion_test = FALSE;
1192 BOOL extract_recipients = FALSE;
1193 BOOL forced_delivery = FALSE;
1194 BOOL f_end_dot = FALSE;
1195 BOOL deliver_give_up = FALSE;
1196 BOOL list_queue = FALSE;
1197 BOOL list_options = FALSE;
1198 BOOL local_queue_only;
1199 BOOL more = TRUE;
1200 BOOL one_msg_action = FALSE;
1201 BOOL queue_only_set = FALSE;
1202 BOOL receiving_message = TRUE;
1203 BOOL unprivileged;
1204 BOOL removed_privilege = FALSE;
1205 BOOL verify_address_mode = FALSE;
1206 BOOL verify_as_sender = FALSE;
1207 BOOL version_printed = FALSE;
1208 uschar *alias_arg = NULL;
1209 uschar *called_as = US"";
1210 uschar *start_queue_run_id = NULL;
1211 uschar *stop_queue_run_id = NULL;
1212 uschar *ftest_domain = NULL;
1213 uschar *ftest_localpart = NULL;
1214 uschar *ftest_prefix = NULL;
1215 uschar *ftest_suffix = NULL;
1216 uschar *real_sender_address;
1217 uschar *originator_home = US"/";
1218 BOOL ftest_system = FALSE;
1219 void *reset_point;
1220
1221 struct passwd *pw;
1222 struct stat statbuf;
1223 pid_t passed_qr_pid = (pid_t)0;
1224 int passed_qr_pipe = -1;
1225 gid_t group_list[NGROUPS_MAX];
1226
1227 /* Possible options for -R and -S */
1228
1229 static uschar *rsopts[] = { US"f", US"ff", US"r", US"rf", US"rff" };
1230
1231 /* Need to define this in case we need to change the environment in order
1232 to get rid of a bogus time zone. We have to make it char rather than uschar
1233 because some OS define it in /usr/include/unistd.h. */
1234
1235 extern char **environ;
1236
1237 /* If the Exim user and/or group and/or the configuration file owner/group were
1238 defined by ref:name at build time, we must now find the actual uid/gid values.
1239 This is a feature to make the lives of binary distributors easier. */
1240
1241 #ifdef EXIM_USERNAME
1242 if (route_finduser(US EXIM_USERNAME, &pw, &exim_uid))
1243 {
1244 exim_gid = pw->pw_gid;
1245 }
1246 else
1247 {
1248 fprintf(stderr, "exim: failed to find uid for user name \"%s\"\n",
1249 EXIM_USERNAME);
1250 exit(EXIT_FAILURE);
1251 }
1252 #endif
1253
1254 #ifdef EXIM_GROUPNAME
1255 if (!route_findgroup(US EXIM_GROUPNAME, &exim_gid))
1256 {
1257 fprintf(stderr, "exim: failed to find gid for group name \"%s\"\n",
1258 EXIM_GROUPNAME);
1259 exit(EXIT_FAILURE);
1260 }
1261 #endif
1262
1263 #ifdef CONFIGURE_OWNERNAME
1264 if (!route_finduser(US CONFIGURE_OWNERNAME, NULL, &config_uid))
1265 {
1266 fprintf(stderr, "exim: failed to find uid for user name \"%s\"\n",
1267 CONFIGURE_OWNERNAME);
1268 exit(EXIT_FAILURE);
1269 }
1270 #endif
1271
1272 #ifdef CONFIGURE_GROUPNAME
1273 if (!route_findgroup(US CONFIGURE_GROUPNAME, &config_gid))
1274 {
1275 fprintf(stderr, "exim: failed to find gid for group name \"%s\"\n",
1276 CONFIGURE_GROUPNAME);
1277 exit(EXIT_FAILURE);
1278 }
1279 #endif
1280
1281 /* In the Cygwin environment, some initialization needs doing. It is fudged
1282 in by means of this macro. */
1283
1284 #ifdef OS_INIT
1285 OS_INIT
1286 #endif
1287
1288 /* Check a field which is patched when we are running Exim within its
1289 testing harness; do a fast initial check, and then the whole thing. */
1290
1291 running_in_test_harness =
1292 *running_status == '<' && Ustrcmp(running_status, "<<<testing>>>") == 0;
1293
1294 /* The C standard says that the equivalent of setlocale(LC_ALL, "C") is obeyed
1295 at the start of a program; however, it seems that some environments do not
1296 follow this. A "strange" locale can affect the formatting of timestamps, so we
1297 make quite sure. */
1298
1299 setlocale(LC_ALL, "C");
1300
1301 /* Set up the default handler for timing using alarm(). */
1302
1303 os_non_restarting_signal(SIGALRM, sigalrm_handler);
1304
1305 /* Ensure we have a buffer for constructing log entries. Use malloc directly,
1306 because store_malloc writes a log entry on failure. */
1307
1308 log_buffer = (uschar *)malloc(LOG_BUFFER_SIZE);
1309 if (log_buffer == NULL)
1310 {
1311 fprintf(stderr, "exim: failed to get store for log buffer\n");
1312 exit(EXIT_FAILURE);
1313 }
1314
1315 /* Set log_stderr to stderr, provided that stderr exists. This gets reset to
1316 NULL when the daemon is run and the file is closed. We have to use this
1317 indirection, because some systems don't allow writing to the variable "stderr".
1318 */
1319
1320 if (fstat(fileno(stderr), &statbuf) >= 0) log_stderr = stderr;
1321
1322 /* Arrange for the PCRE regex library to use our store functions. Note that
1323 the normal calls are actually macros that add additional arguments for
1324 debugging purposes so we have to assign specially constructed functions here.
1325 The default is to use store in the stacking pool, but this is overridden in the
1326 regex_must_compile() function. */
1327
1328 pcre_malloc = function_store_get;
1329 pcre_free = function_dummy_free;
1330
1331 /* Ensure there is a big buffer for temporary use in several places. It is put
1332 in malloc store so that it can be freed for enlargement if necessary. */
1333
1334 big_buffer = store_malloc(big_buffer_size);
1335
1336 /* Set up the handler for the data request signal, and set the initial
1337 descriptive text. */
1338
1339 set_process_info("initializing");
1340 os_restarting_signal(SIGUSR1, usr1_handler);
1341
1342 /* SIGHUP is used to get the daemon to reconfigure. It gets set as appropriate
1343 in the daemon code. For the rest of Exim's uses, we ignore it. */
1344
1345 signal(SIGHUP, SIG_IGN);
1346
1347 /* We don't want to die on pipe errors as the code is written to handle
1348 the write error instead. */
1349
1350 signal(SIGPIPE, SIG_IGN);
1351
1352 /* Under some circumstance on some OS, Exim can get called with SIGCHLD
1353 set to SIG_IGN. This causes subprocesses that complete before the parent
1354 process waits for them not to hang around, so when Exim calls wait(), nothing
1355 is there. The wait() code has been made robust against this, but let's ensure
1356 that SIGCHLD is set to SIG_DFL, because it's tidier to wait and get a process
1357 ending status. We use sigaction rather than plain signal() on those OS where
1358 SA_NOCLDWAIT exists, because we want to be sure it is turned off. (There was a
1359 problem on AIX with this.) */
1360
1361 #ifdef SA_NOCLDWAIT
1362 {
1363 struct sigaction act;
1364 act.sa_handler = SIG_DFL;
1365 sigemptyset(&(act.sa_mask));
1366 act.sa_flags = 0;
1367 sigaction(SIGCHLD, &act, NULL);
1368 }
1369 #else
1370 signal(SIGCHLD, SIG_DFL);
1371 #endif
1372
1373 /* Save the arguments for use if we re-exec exim as a daemon after receiving
1374 SIGHUP. */
1375
1376 sighup_argv = argv;
1377
1378 /* Set up the version number. Set up the leading 'E' for the external form of
1379 message ids, set the pointer to the internal form, and initialize it to
1380 indicate no message being processed. */
1381
1382 version_init();
1383 message_id_option[0] = '-';
1384 message_id_external = message_id_option + 1;
1385 message_id_external[0] = 'E';
1386 message_id = message_id_external + 1;
1387 message_id[0] = 0;
1388
1389 /* Set the umask to zero so that any files that Exim creates are created
1390 with the modes that it specifies. */
1391
1392 umask(0);
1393
1394 /* Precompile the regular expression for matching a message id. Keep this in
1395 step with the code that generates ids in the accept.c module. We need to do
1396 this here, because the -M options check their arguments for syntactic validity
1397 using mac_ismsgid, which uses this. */
1398
1399 regex_ismsgid =
1400 regex_must_compile(US"^(?:[^\\W_]{6}-){2}[^\\W_]{2}$", FALSE, TRUE);
1401
1402 /* If the program is called as "mailq" treat it as equivalent to "exim -bp";
1403 this seems to be a generally accepted convention, since one finds symbolic
1404 links called "mailq" in standard OS configurations. */
1405
1406 if ((namelen == 5 && Ustrcmp(argv[0], "mailq") == 0) ||
1407 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/mailq", 6) == 0))
1408 {
1409 list_queue = TRUE;
1410 receiving_message = FALSE;
1411 called_as = US"-mailq";
1412 }
1413
1414 /* If the program is called as "rmail" treat it as equivalent to
1415 "exim -i -oee", thus allowing UUCP messages to be input using non-SMTP mode,
1416 i.e. preventing a single dot on a line from terminating the message, and
1417 returning with zero return code, even in cases of error (provided an error
1418 message has been sent). */
1419
1420 if ((namelen == 5 && Ustrcmp(argv[0], "rmail") == 0) ||
1421 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/rmail", 6) == 0))
1422 {
1423 dot_ends = FALSE;
1424 called_as = US"-rmail";
1425 errors_sender_rc = EXIT_SUCCESS;
1426 }
1427
1428 /* If the program is called as "rsmtp" treat it as equivalent to "exim -bS";
1429 this is a smail convention. */
1430
1431 if ((namelen == 5 && Ustrcmp(argv[0], "rsmtp") == 0) ||
1432 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/rsmtp", 6) == 0))
1433 {
1434 smtp_input = smtp_batched_input = TRUE;
1435 called_as = US"-rsmtp";
1436 }
1437
1438 /* If the program is called as "runq" treat it as equivalent to "exim -q";
1439 this is a smail convention. */
1440
1441 if ((namelen == 4 && Ustrcmp(argv[0], "runq") == 0) ||
1442 (namelen > 4 && Ustrncmp(argv[0] + namelen - 5, "/runq", 5) == 0))
1443 {
1444 queue_interval = 0;
1445 receiving_message = FALSE;
1446 called_as = US"-runq";
1447 }
1448
1449 /* If the program is called as "newaliases" treat it as equivalent to
1450 "exim -bi"; this is a sendmail convention. */
1451
1452 if ((namelen == 10 && Ustrcmp(argv[0], "newaliases") == 0) ||
1453 (namelen > 10 && Ustrncmp(argv[0] + namelen - 11, "/newaliases", 11) == 0))
1454 {
1455 bi_option = TRUE;
1456 receiving_message = FALSE;
1457 called_as = US"-newaliases";
1458 }
1459
1460 /* Save the original effective uid for a couple of uses later. It should
1461 normally be root, but in some esoteric environments it may not be. */
1462
1463 original_euid = geteuid();
1464
1465 /* Get the real uid and gid. If the caller is root, force the effective uid/gid
1466 to be the same as the real ones. This makes a difference only if Exim is setuid
1467 (or setgid) to something other than root, which could be the case in some
1468 special configurations. */
1469
1470 real_uid = getuid();
1471 real_gid = getgid();
1472
1473 if (real_uid == root_uid)
1474 {
1475 setgid(real_gid);
1476 setuid(real_uid);
1477 }
1478
1479 /* If neither the original real uid nor the original euid was root, Exim is
1480 running in an unprivileged state. */
1481
1482 unprivileged = (real_uid != root_uid && original_euid != root_uid);
1483
1484 /* If the first argument is --help, pretend there are no arguments. This will
1485 cause a brief message to be given. */
1486
1487 if (argc > 1 && Ustrcmp(argv[1], "--help") == 0) argc = 1;
1488
1489 /* Scan the program's arguments. Some can be dealt with right away; others are
1490 simply recorded for checking and handling afterwards. Do a high-level switch
1491 on the second character (the one after '-'), to save some effort. */
1492
1493 for (i = 1; i < argc; i++)
1494 {
1495 BOOL badarg = FALSE;
1496 uschar *arg = argv[i];
1497 uschar *argrest;
1498 int switchchar;
1499
1500 /* An argument not starting with '-' is the start of a recipients list;
1501 break out of the options-scanning loop. */
1502
1503 if (arg[0] != '-')
1504 {
1505 recipients_arg = i;
1506 break;
1507 }
1508
1509 /* An option consistion of -- terminates the options */
1510
1511 if (Ustrcmp(arg, "--") == 0)
1512 {
1513 recipients_arg = i + 1;
1514 break;
1515 }
1516
1517 /* Handle flagged options */
1518
1519 switchchar = arg[1];
1520 argrest = arg+2;
1521
1522 /* Make all -ex options synonymous with -oex arguments, since that
1523 is assumed by various callers. Also make -qR options synonymous with -R
1524 options, as that seems to be required as well. Allow for -qqR too, and
1525 the same for -S options. */
1526
1527 if (Ustrncmp(arg+1, "oe", 2) == 0 ||
1528 Ustrncmp(arg+1, "qR", 2) == 0 ||
1529 Ustrncmp(arg+1, "qS", 2) == 0)
1530 {
1531 switchchar = arg[2];
1532 argrest++;
1533 }
1534 else if (Ustrncmp(arg+1, "qqR", 3) == 0 || Ustrncmp(arg+1, "qqS", 3) == 0)
1535 {
1536 switchchar = arg[3];
1537 argrest += 2;
1538 queue_2stage = TRUE;
1539 }
1540
1541 /* Make -r synonymous with -f, since it is a documented alias */
1542
1543 else if (arg[1] == 'r') switchchar = 'f';
1544
1545 /* Make -ov synonymous with -v */
1546
1547 else if (Ustrcmp(arg, "-ov") == 0)
1548 {
1549 switchchar = 'v';
1550 argrest++;
1551 }
1552
1553 /* High-level switch on active initial letter */
1554
1555 switch(switchchar)
1556 {
1557 /* -Btype is a sendmail option for 7bit/8bit setting. Exim is 8-bit clean
1558 so has no need of it. */
1559
1560 case 'B':
1561 if (*argrest == 0) i++; /* Skip over the type */
1562 break;
1563
1564
1565 case 'b':
1566 receiving_message = FALSE; /* Reset TRUE for -bm, -bS, -bs below */
1567
1568 /* -bd: Run in daemon mode, awaiting SMTP connections.
1569 -bdf: Ditto, but in the foreground.
1570 */
1571
1572 if (*argrest == 'd')
1573 {
1574 daemon_listen = TRUE;
1575 if (*(++argrest) == 'f') background_daemon = FALSE;
1576 else if (*argrest != 0) { badarg = TRUE; break; }
1577 }
1578
1579 /* -be: Run in expansion test mode */
1580
1581 else if (*argrest == 'e')
1582 expansion_test = checking = TRUE;
1583
1584 /* -bf: Run in mail filter testing mode
1585 -bF: Ditto, but for system filters
1586 -bfd: Set domain for filter testing
1587 -bfl: Set local part for filter testing
1588 -bfp: Set prefix for filter testing
1589 -bfs: Set suffix for filter testing
1590 */
1591
1592 else if (*argrest == 'f' || *argrest == 'F')
1593 {
1594 ftest_system = *argrest++ == 'F';
1595 if (*argrest == 0)
1596 {
1597 if(++i < argc) filter_test = argv[i]; else
1598 {
1599 fprintf(stderr, "exim: file name expected after %s\n", argv[i-1]);
1600 exit(EXIT_FAILURE);
1601 }
1602 }
1603 else
1604 {
1605 if (++i >= argc)
1606 {
1607 fprintf(stderr, "exim: string expected after %s\n", arg);
1608 exit(EXIT_FAILURE);
1609 }
1610 if (Ustrcmp(argrest, "d") == 0) ftest_domain = argv[i];
1611 else if (Ustrcmp(argrest, "l") == 0) ftest_localpart = argv[i];
1612 else if (Ustrcmp(argrest, "p") == 0) ftest_prefix = argv[i];
1613 else if (Ustrcmp(argrest, "s") == 0) ftest_suffix = argv[i];
1614 else { badarg = TRUE; break; }
1615 }
1616 }
1617
1618 /* -bh: Host checking - an IP address must follow. */
1619
1620 else if (Ustrcmp(argrest, "h") == 0 || Ustrcmp(argrest, "hc") == 0)
1621 {
1622 if (++i >= argc) { badarg = TRUE; break; }
1623 sender_host_address = argv[i];
1624 host_checking = checking = log_testing_mode = TRUE;
1625 host_checking_callout = argrest[1] == 'c';
1626 }
1627
1628 /* -bi: This option is used by sendmail to initialize *the* alias file,
1629 though it has the -oA option to specify a different file. Exim has no
1630 concept of *the* alias file, but since Sun's YP make script calls
1631 sendmail this way, some support must be provided. */
1632
1633 else if (Ustrcmp(argrest, "i") == 0) bi_option = TRUE;
1634
1635 /* -bm: Accept and deliver message - the default option. Reinstate
1636 receiving_message, which got turned off for all -b options. */
1637
1638 else if (Ustrcmp(argrest, "m") == 0) receiving_message = TRUE;
1639
1640 /* -bnq: For locally originating messages, do not qualify unqualified
1641 addresses. In the envelope, this causes errors; in header lines they
1642 just get left. */
1643
1644 else if (Ustrcmp(argrest, "nq") == 0)
1645 {
1646 allow_unqualified_sender = FALSE;
1647 allow_unqualified_recipient = FALSE;
1648 }
1649
1650 /* -bpxx: List the contents of the mail queue, in various forms. If
1651 the option is -bpc, just a queue count is needed. Otherwise, if the
1652 first letter after p is r, then order is random. */
1653
1654 else if (*argrest == 'p')
1655 {
1656 if (*(++argrest) == 'c')
1657 {
1658 count_queue = TRUE;
1659 if (*(++argrest) != 0) badarg = TRUE;
1660 break;
1661 }
1662
1663 if (*argrest == 'r')
1664 {
1665 list_queue_option = 8;
1666 argrest++;
1667 }
1668 else list_queue_option = 0;
1669
1670 list_queue = TRUE;
1671
1672 /* -bp: List the contents of the mail queue, top-level only */
1673
1674 if (*argrest == 0) {}
1675
1676 /* -bpu: List the contents of the mail queue, top-level undelivered */
1677
1678 else if (Ustrcmp(argrest, "u") == 0) list_queue_option += 1;
1679
1680 /* -bpa: List the contents of the mail queue, including all delivered */
1681
1682 else if (Ustrcmp(argrest, "a") == 0) list_queue_option += 2;
1683
1684 /* Unknown after -bp[r] */
1685
1686 else
1687 {
1688 badarg = TRUE;
1689 break;
1690 }
1691 }
1692
1693
1694 /* -bP: List the configuration variables given as the address list.
1695 Force -v, so configuration errors get displayed. */
1696
1697 else if (Ustrcmp(argrest, "P") == 0)
1698 {
1699 list_options = TRUE;
1700 debug_selector |= D_v;
1701 debug_file = stderr;
1702 }
1703
1704 /* -brt: Test retry configuration lookup */
1705
1706 else if (Ustrcmp(argrest, "rt") == 0)
1707 {
1708 test_retry_arg = i + 1;
1709 goto END_ARG;
1710 }
1711
1712 /* -brw: Test rewrite configuration */
1713
1714 else if (Ustrcmp(argrest, "rw") == 0)
1715 {
1716 test_rewrite_arg = i + 1;
1717 goto END_ARG;
1718 }
1719
1720 /* -bS: Read SMTP commands on standard input, but produce no replies -
1721 all errors are reported by sending messages. */
1722
1723 else if (Ustrcmp(argrest, "S") == 0)
1724 smtp_input = smtp_batched_input = receiving_message = TRUE;
1725
1726 /* -bs: Read SMTP commands on standard input and produce SMTP replies
1727 on standard output. */
1728
1729 else if (Ustrcmp(argrest, "s") == 0) smtp_input = receiving_message = TRUE;
1730
1731 /* -bt: address testing mode */
1732
1733 else if (Ustrcmp(argrest, "t") == 0)
1734 address_test_mode = checking = log_testing_mode = TRUE;
1735
1736 /* -bv: verify addresses */
1737
1738 else if (Ustrcmp(argrest, "v") == 0)
1739 verify_address_mode = checking = log_testing_mode = TRUE;
1740
1741 /* -bvs: verify sender addresses */
1742
1743 else if (Ustrcmp(argrest, "vs") == 0)
1744 {
1745 verify_address_mode = checking = log_testing_mode = TRUE;
1746 verify_as_sender = TRUE;
1747 }
1748
1749 /* -bV: Print version string and support details */
1750
1751 else if (Ustrcmp(argrest, "V") == 0)
1752 {
1753 printf("Exim version %s #%s built %s\n", version_string,
1754 version_cnumber, version_date);
1755 printf("%s\n", CS version_copyright);
1756 version_printed = TRUE;
1757 show_whats_supported(stdout);
1758 }
1759
1760 else badarg = TRUE;
1761 break;
1762
1763
1764 /* -C: change configuration file list; ignore if it isn't really
1765 a change! Enforce a prefix check if required. */
1766
1767 case 'C':
1768 if (*argrest == 0)
1769 {
1770 if(++i < argc) argrest = argv[i]; else
1771 { badarg = TRUE; break; }
1772 }
1773 if (Ustrcmp(config_main_filelist, argrest) != 0)
1774 {
1775 #ifdef ALT_CONFIG_PREFIX
1776 int sep = 0;
1777 int len = Ustrlen(ALT_CONFIG_PREFIX);
1778 uschar *list = argrest;
1779 uschar *filename;
1780 while((filename = string_nextinlist(&list, &sep, big_buffer,
1781 big_buffer_size)) != NULL)
1782 {
1783 if ((Ustrlen(filename) < len ||
1784 Ustrncmp(filename, ALT_CONFIG_PREFIX, len) != 0 ||
1785 Ustrstr(filename, "/../") != NULL) &&
1786 (Ustrcmp(filename, "/dev/null") != 0 || real_uid != root_uid))
1787 {
1788 fprintf(stderr, "-C Permission denied\n");
1789 exit(EXIT_FAILURE);
1790 }
1791 }
1792 #endif
1793
1794 config_main_filelist = argrest;
1795 config_changed = TRUE;
1796 }
1797 break;
1798
1799
1800 /* -D: set up a macro definition */
1801
1802 case 'D':
1803 #ifdef DISABLE_D_OPTION
1804 fprintf(stderr, "exim: -D is not available in this Exim binary\n");
1805 exit(EXIT_FAILURE);
1806 #else
1807 {
1808 int ptr = 0;
1809 macro_item *mlast = NULL;
1810 macro_item *m;
1811 uschar name[24];
1812 uschar *s = argrest;
1813
1814 while (isspace(*s)) s++;
1815
1816 if (*s < 'A' || *s > 'Z')
1817 {
1818 fprintf(stderr, "exim: macro name set by -D must start with "
1819 "an upper case letter\n");
1820 exit(EXIT_FAILURE);
1821 }
1822
1823 while (isalnum(*s) || *s == '_')
1824 {
1825 if (ptr < sizeof(name)-1) name[ptr++] = *s;
1826 s++;
1827 }
1828 name[ptr] = 0;
1829 if (ptr == 0) { badarg = TRUE; break; }
1830 while (isspace(*s)) s++;
1831 if (*s != 0)
1832 {
1833 if (*s++ != '=') { badarg = TRUE; break; }
1834 while (isspace(*s)) s++;
1835 }
1836
1837 for (m = macros; m != NULL; m = m->next)
1838 {
1839 if (Ustrcmp(m->name, name) == 0)
1840 {
1841 fprintf(stderr, "exim: duplicated -D in command line\n");
1842 exit(EXIT_FAILURE);
1843 }
1844 mlast = m;
1845 }
1846
1847 m = store_get(sizeof(macro_item) + Ustrlen(name));
1848 m->next = NULL;
1849 m->command_line = TRUE;
1850 if (mlast == NULL) macros = m; else mlast->next = m;
1851 Ustrcpy(m->name, name);
1852 m->replacement = string_copy(s);
1853
1854 if (clmacro_count >= MAX_CLMACROS)
1855 {
1856 fprintf(stderr, "exim: too many -D options on command line\n");
1857 exit(EXIT_FAILURE);
1858 }
1859 clmacros[clmacro_count++] = string_sprintf("-D%s=%s", m->name,
1860 m->replacement);
1861 }
1862 #endif
1863 break;
1864
1865 /* -d: Set debug level (see also -v below) or set the drop_cr option.
1866 The latter is now a no-opt, retained for compatibility only. */
1867
1868 case 'd':
1869 if (Ustrcmp(argrest, "ropcr") == 0)
1870 {
1871 /* drop_cr = TRUE; */
1872 }
1873
1874 /* Use an intermediate variable so that we don't set debugging while
1875 decoding the debugging bits. */
1876
1877 else
1878 {
1879 unsigned int selector = D_default;
1880 debug_selector = 0;
1881 debug_file = NULL;
1882 if (*argrest != 0)
1883 decode_bits(&selector, NULL, argrest, debug_options,
1884 debug_options_count, US"debug");
1885 debug_selector = selector;
1886 }
1887 break;
1888
1889
1890 /* -E: This is a local error message. This option is not intended for
1891 external use at all, but is not restricted to trusted callers because it
1892 does no harm (just suppresses certain error messages) and if Exim is run
1893 not setuid root it won't always be trusted when it generates error
1894 messages using this option. If there is a message id following -E, point
1895 message_reference at it, for logging. */
1896
1897 case 'E':
1898 local_error_message = TRUE;
1899 if (mac_ismsgid(argrest)) message_reference = argrest;
1900 break;
1901
1902
1903 /* -ex: The vacation program calls sendmail with the undocumented "-eq"
1904 option, so it looks as if historically the -oex options are also callable
1905 without the leading -o. So we have to accept them. Before the switch,
1906 anything starting -oe has been converted to -e. Exim does not support all
1907 of the sendmail error options. */
1908
1909 case 'e':
1910 if (Ustrcmp(argrest, "e") == 0)
1911 {
1912 arg_error_handling = ERRORS_SENDER;
1913 errors_sender_rc = EXIT_SUCCESS;
1914 }
1915 else if (Ustrcmp(argrest, "m") == 0) arg_error_handling = ERRORS_SENDER;
1916 else if (Ustrcmp(argrest, "p") == 0) arg_error_handling = ERRORS_STDERR;
1917 else if (Ustrcmp(argrest, "q") == 0) arg_error_handling = ERRORS_STDERR;
1918 else if (Ustrcmp(argrest, "w") == 0) arg_error_handling = ERRORS_SENDER;
1919 else badarg = TRUE;
1920 break;
1921
1922
1923 /* -F: Set sender's full name, used instead of the gecos entry from
1924 the password file. Since users can usually alter their gecos entries,
1925 there's no security involved in using this instead. The data can follow
1926 the -F or be in the next argument. */
1927
1928 case 'F':
1929 if (*argrest == 0)
1930 {
1931 if(++i < argc) argrest = argv[i]; else
1932 { badarg = TRUE; break; }
1933 }
1934 originator_name = argrest;
1935 break;
1936
1937
1938 /* -f: Set sender's address - this value is only actually used if Exim is
1939 run by a trusted user, or if untrusted_set_sender is set and matches the
1940 address, except that the null address can always be set by any user. The
1941 test for this happens later, when the value given here is ignored when not
1942 permitted. For an untrusted user, the actual sender is still put in Sender:
1943 if it doesn't match the From: header (unless no_local_from_check is set).
1944 The data can follow the -f or be in the next argument. The -r switch is an
1945 obsolete form of -f but since there appear to be programs out there that
1946 use anything that sendmail has ever supported, better accept it - the
1947 synonymizing is done before the switch above.
1948
1949 At this stage, we must allow domain literal addresses, because we don't
1950 know what the setting of allow_domain_literals is yet. Ditto for trailing
1951 dots and strip_trailing_dot. */
1952
1953 case 'f':
1954 {
1955 int start, end;
1956 uschar *errmess;
1957 if (*argrest == 0)
1958 {
1959 if (i+1 < argc) argrest = argv[++i]; else
1960 { badarg = TRUE; break; }
1961 }
1962 if (*argrest == 0)
1963 {
1964 sender_address = string_sprintf(""); /* Ensure writeable memory */
1965 }
1966 else
1967 {
1968 uschar *temp = argrest + Ustrlen(argrest) - 1;
1969 while (temp >= argrest && isspace(*temp)) temp--;
1970 if (temp >= argrest && *temp == '.') f_end_dot = TRUE;
1971 allow_domain_literals = TRUE;
1972 strip_trailing_dot = TRUE;
1973 sender_address = parse_extract_address(argrest, &errmess, &start, &end,
1974 &sender_address_domain, TRUE);
1975 allow_domain_literals = FALSE;
1976 strip_trailing_dot = FALSE;
1977 if (sender_address == NULL)
1978 {
1979 fprintf(stderr, "exim: bad -f address \"%s\": %s\n", argrest, errmess);
1980 return EXIT_FAILURE;
1981 }
1982 }
1983 sender_address_forced = TRUE;
1984 }
1985 break;
1986
1987 /* This is some Sendmail thing which can be ignored */
1988
1989 case 'G':
1990 break;
1991
1992 /* -h: Set the hop count for an incoming message. Exim does not currently
1993 support this; it always computes it by counting the Received: headers.
1994 To put it in will require a change to the spool header file format. */
1995
1996 case 'h':
1997 if (*argrest == 0)
1998 {
1999 if(++i < argc) argrest = argv[i]; else
2000 { badarg = TRUE; break; }
2001 }
2002 if (!isdigit(*argrest)) badarg = TRUE;
2003 break;
2004
2005
2006 /* -i: Set flag so dot doesn't end non-SMTP input (same as -oi, seems
2007 not to be documented for sendmail but mailx (at least) uses it) */
2008
2009 case 'i':
2010 if (*argrest == 0) dot_ends = FALSE; else badarg = TRUE;
2011 break;
2012
2013
2014 case 'M':
2015 receiving_message = FALSE;
2016
2017 /* -MC: continue delivery of another message via an existing open
2018 file descriptor. This option is used for an internal call by the
2019 smtp transport when there is a pending message waiting to go to an
2020 address to which it has got a connection. Five subsequent arguments are
2021 required: transport name, host name, IP address, sequence number, and
2022 message_id. Transports may decline to create new processes if the sequence
2023 number gets too big. The channel is stdin. This (-MC) must be the last
2024 argument. There's a subsequent check that the real-uid is privileged.
2025
2026 If we are running in the test harness. delay for a bit, to let the process
2027 that set this one up complete. This makes for repeatability of the logging,
2028 etc. output. */
2029
2030 if (Ustrcmp(argrest, "C") == 0)
2031 {
2032 if (argc != i + 6)
2033 {
2034 fprintf(stderr, "exim: too many or too few arguments after -MC\n");
2035 return EXIT_FAILURE;
2036 }
2037
2038 if (msg_action_arg >= 0)
2039 {
2040 fprintf(stderr, "exim: incompatible arguments\n");
2041 return EXIT_FAILURE;
2042 }
2043
2044 continue_transport = argv[++i];
2045 continue_hostname = argv[++i];
2046 continue_host_address = argv[++i];
2047 continue_sequence = Uatoi(argv[++i]);
2048 msg_action = MSG_DELIVER;
2049 msg_action_arg = ++i;
2050 forced_delivery = TRUE;
2051 queue_run_pid = passed_qr_pid;
2052 queue_run_pipe = passed_qr_pipe;
2053
2054 if (!mac_ismsgid(argv[i]))
2055 {
2056 fprintf(stderr, "exim: malformed message id %s after -MC option\n",
2057 argv[i]);
2058 return EXIT_FAILURE;
2059 }
2060
2061 if (running_in_test_harness) millisleep(500);
2062 break;
2063 }
2064
2065 /* -MCA: set the smtp_authenticated flag; this is useful only when it
2066 precedes -MC (see above). The flag indicates that the host to which
2067 Exim is connected has accepted an AUTH sequence. */
2068
2069 else if (Ustrcmp(argrest, "CA") == 0)
2070 {
2071 smtp_authenticated = TRUE;
2072 break;
2073 }
2074
2075 /* -MCP: set the smtp_use_pipelining flag; this is useful only when
2076 it preceded -MC (see above) */
2077
2078 else if (Ustrcmp(argrest, "CP") == 0)
2079 {
2080 smtp_use_pipelining = TRUE;
2081 break;
2082 }
2083
2084 /* -MCQ: pass on the pid of the queue-running process that started
2085 this chain of deliveries and the fd of its synchronizing pipe; this
2086 is useful only when it precedes -MC (see above) */
2087
2088 else if (Ustrcmp(argrest, "CQ") == 0)
2089 {
2090 if(++i < argc) passed_qr_pid = (pid_t)(Uatol(argv[i]));
2091 else badarg = TRUE;
2092 if(++i < argc) passed_qr_pipe = (int)(Uatol(argv[i]));
2093 else badarg = TRUE;
2094 break;
2095 }
2096
2097 /* -MCS: set the smtp_use_size flag; this is useful only when it
2098 precedes -MC (see above) */
2099
2100 else if (Ustrcmp(argrest, "CS") == 0)
2101 {
2102 smtp_use_size = TRUE;
2103 break;
2104 }
2105
2106 /* -MCT: set the tls_offered flag; this is useful only when it
2107 precedes -MC (see above). The flag indicates that the host to which
2108 Exim is connected has offered TLS support. */
2109
2110 #ifdef SUPPORT_TLS
2111 else if (Ustrcmp(argrest, "CT") == 0)
2112 {
2113 tls_offered = TRUE;
2114 break;
2115 }
2116 #endif
2117
2118 /* -M[x]: various operations on the following list of message ids:
2119 -M deliver the messages, ignoring next retry times and thawing
2120 -Mc deliver the messages, checking next retry times, no thawing
2121 -Mf freeze the messages
2122 -Mg give up on the messages
2123 -Mt thaw the messages
2124 -Mrm remove the messages
2125 In the above cases, this must be the last option. There are also the
2126 following options which are followed by a single message id, and which
2127 act on that message. Some of them use the "recipient" addresses as well.
2128 -Mar add recipient(s)
2129 -Mmad mark all recipients delivered
2130 -Mmd mark recipients(s) delivered
2131 -Mes edit sender
2132 -Mvb show body
2133 -Mvh show header
2134 -Mvl show log
2135 */
2136
2137 else if (*argrest == 0)
2138 {
2139 msg_action = MSG_DELIVER;
2140 forced_delivery = deliver_force_thaw = TRUE;
2141 }
2142 else if (Ustrcmp(argrest, "ar") == 0)
2143 {
2144 msg_action = MSG_ADD_RECIPIENT;
2145 one_msg_action = TRUE;
2146 }
2147 else if (Ustrcmp(argrest, "c") == 0) msg_action = MSG_DELIVER;
2148 else if (Ustrcmp(argrest, "es") == 0)
2149 {
2150 msg_action = MSG_EDIT_SENDER;
2151 one_msg_action = TRUE;
2152 }
2153 else if (Ustrcmp(argrest, "f") == 0) msg_action = MSG_FREEZE;
2154 else if (Ustrcmp(argrest, "g") == 0)
2155 {
2156 msg_action = MSG_DELIVER;
2157 deliver_give_up = TRUE;
2158 }
2159 else if (Ustrcmp(argrest, "mad") == 0)
2160 {
2161 msg_action = MSG_MARK_ALL_DELIVERED;
2162 }
2163 else if (Ustrcmp(argrest, "md") == 0)
2164 {
2165 msg_action = MSG_MARK_DELIVERED;
2166 one_msg_action = TRUE;
2167 }
2168 else if (Ustrcmp(argrest, "rm") == 0) msg_action = MSG_REMOVE;
2169 else if (Ustrcmp(argrest, "t") == 0) msg_action = MSG_THAW;
2170 else if (Ustrcmp(argrest, "vb") == 0)
2171 {
2172 msg_action = MSG_SHOW_BODY;
2173 one_msg_action = TRUE;
2174 }
2175 else if (Ustrcmp(argrest, "vh") == 0)
2176 {
2177 msg_action = MSG_SHOW_HEADER;
2178 one_msg_action = TRUE;
2179 }
2180 else if (Ustrcmp(argrest, "vl") == 0)
2181 {
2182 msg_action = MSG_SHOW_LOG;
2183 one_msg_action = TRUE;
2184 }
2185 else { badarg = TRUE; break; }
2186
2187 /* All the -Mxx options require at least one message id. */
2188
2189 msg_action_arg = i + 1;
2190 if (msg_action_arg >= argc)
2191 {
2192 fprintf(stderr, "exim: no message ids given after %s option\n", arg);
2193 return EXIT_FAILURE;
2194 }
2195
2196 /* Some require only message ids to follow */
2197
2198 if (!one_msg_action)
2199 {
2200 int j;
2201 for (j = msg_action_arg; j < argc; j++) if (!mac_ismsgid(argv[j]))
2202 {
2203 fprintf(stderr, "exim: malformed message id %s after %s option\n",
2204 argv[j], arg);
2205 return EXIT_FAILURE;
2206 }
2207 goto END_ARG; /* Remaining args are ids */
2208 }
2209
2210 /* Others require only one message id, possibly followed by addresses,
2211 which will be handled as normal arguments. */
2212
2213 else
2214 {
2215 if (!mac_ismsgid(argv[msg_action_arg]))
2216 {
2217 fprintf(stderr, "exim: malformed message id %s after %s option\n",
2218 argv[msg_action_arg], arg);
2219 return EXIT_FAILURE;
2220 }
2221 i++;
2222 }
2223 break;
2224
2225
2226 /* Some programs seem to call the -om option without the leading o;
2227 for sendmail it askes for "me too". Exim always does this. */
2228
2229 case 'm':
2230 if (*argrest != 0) badarg = TRUE;
2231 break;
2232
2233
2234 /* -N: don't do delivery - a debugging option that stops transports doing
2235 their thing. It implies debugging at the D_v level. */
2236
2237 case 'N':
2238 if (*argrest == 0)
2239 {
2240 dont_deliver = TRUE;
2241 debug_selector |= D_v;
2242 debug_file = stderr;
2243 }
2244 else badarg = TRUE;
2245 break;
2246
2247
2248 /* -n: This means "don't alias" in sendmail, apparently. Just ignore
2249 it. */
2250
2251 case 'n':
2252 break;
2253
2254 /* -O: Just ignore it. In sendmail, apparently -O option=value means set
2255 option to the specified value. This form uses long names. We need to handle
2256 -O option=value and -Ooption=value. */
2257
2258 case 'O':
2259 if (*argrest == 0)
2260 {
2261 if (++i >= argc)
2262 {
2263 fprintf(stderr, "exim: string expected after -O\n");
2264 exit(EXIT_FAILURE);
2265 }
2266 }
2267 break;
2268
2269 case 'o':
2270
2271 /* -oA: Set an argument for the bi command (sendmail's "alternate alias
2272 file" option). */
2273
2274 if (*argrest == 'A')
2275 {
2276 alias_arg = argrest + 1;
2277 if (alias_arg[0] == 0)
2278 {
2279 if (i+1 < argc) alias_arg = argv[++i]; else
2280 {
2281 fprintf(stderr, "exim: string expected after -oA\n");
2282 exit(EXIT_FAILURE);
2283 }
2284 }
2285 }
2286
2287 /* -oB: Set a connection message max value for remote deliveries */
2288
2289 else if (*argrest == 'B')
2290 {
2291 uschar *p = argrest + 1;
2292 if (p[0] == 0)
2293 {
2294 if (i+1 < argc && isdigit((argv[i+1][0]))) p = argv[++i]; else
2295 {
2296 connection_max_messages = 1;
2297 p = NULL;
2298 }
2299 }
2300
2301 if (p != NULL)
2302 {
2303 if (!isdigit(*p))
2304 {
2305 fprintf(stderr, "exim: number expected after -oB\n");
2306 exit(EXIT_FAILURE);
2307 }
2308 connection_max_messages = Uatoi(p);
2309 }
2310 }
2311
2312 /* -odb: background delivery */
2313
2314 else if (Ustrcmp(argrest, "db") == 0)
2315 {
2316 synchronous_delivery = FALSE;
2317 arg_queue_only = FALSE;
2318 queue_only_set = TRUE;
2319 }
2320
2321 /* -odf: foreground delivery (smail-compatible option); same effect as
2322 -odi: interactive (synchronous) delivery (sendmail-compatible option)
2323 */
2324
2325 else if (Ustrcmp(argrest, "df") == 0 || Ustrcmp(argrest, "di") == 0)
2326 {
2327 synchronous_delivery = TRUE;
2328 arg_queue_only = FALSE;
2329 queue_only_set = TRUE;
2330 }
2331
2332 /* -odq: queue only */
2333
2334 else if (Ustrcmp(argrest, "dq") == 0)
2335 {
2336 synchronous_delivery = FALSE;
2337 arg_queue_only = TRUE;
2338 queue_only_set = TRUE;
2339 }
2340
2341 /* -odqs: queue SMTP only - do local deliveries and remote routing,
2342 but no remote delivery */
2343
2344 else if (Ustrcmp(argrest, "dqs") == 0)
2345 {
2346 queue_smtp = TRUE;
2347 arg_queue_only = FALSE;
2348 queue_only_set = TRUE;
2349 }
2350
2351 /* -oex: Sendmail error flags. As these are also accepted without the
2352 leading -o prefix, for compatibility with vacation and other callers,
2353 they are handled with -e above. */
2354
2355 /* -oi: Set flag so dot doesn't end non-SMTP input (same as -i)
2356 -oitrue: Another sendmail syntax for the same */
2357
2358 else if (Ustrcmp(argrest, "i") == 0 ||
2359 Ustrcmp(argrest, "itrue") == 0)
2360 dot_ends = FALSE;
2361
2362 /* -oM*: Set various characteristics for an incoming message; actually
2363 acted on for trusted callers only. */
2364
2365 else if (*argrest == 'M')
2366 {
2367 if (i+1 >= argc)
2368 {
2369 fprintf(stderr, "exim: data expected after -o%s\n", argrest);
2370 exit(EXIT_FAILURE);
2371 }
2372
2373 /* -oMa: Set sender host address */
2374
2375 if (Ustrcmp(argrest, "Ma") == 0) sender_host_address = argv[++i];
2376
2377 /* -oMaa: Set authenticator name */
2378
2379 else if (Ustrcmp(argrest, "Maa") == 0)
2380 sender_host_authenticated = argv[++i];
2381
2382 /* -oMas: setting authenticated sender */
2383
2384 else if (Ustrcmp(argrest, "Mas") == 0) authenticated_sender = argv[++i];
2385
2386 /* -oMai: setting authenticated id */
2387
2388 else if (Ustrcmp(argrest, "Mai") == 0) authenticated_id = argv[++i];
2389
2390 /* -oMi: Set incoming interface address */
2391
2392 else if (Ustrcmp(argrest, "Mi") == 0) interface_address = argv[++i];
2393
2394 /* -oMr: Received protocol */
2395
2396 else if (Ustrcmp(argrest, "Mr") == 0) received_protocol = argv[++i];
2397
2398 /* -oMs: Set sender host name */
2399
2400 else if (Ustrcmp(argrest, "Ms") == 0) sender_host_name = argv[++i];
2401
2402 /* -oMt: Set sender ident */
2403
2404 else if (Ustrcmp(argrest, "Mt") == 0) sender_ident = argv[++i];
2405
2406 /* Else a bad argument */
2407
2408 else
2409 {
2410 badarg = TRUE;
2411 break;
2412 }
2413 }
2414
2415 /* -om: Me-too flag for aliases. Exim always does this. Some programs
2416 seem to call this as -m (undocumented), so that is also accepted (see
2417 above). */
2418
2419 else if (Ustrcmp(argrest, "m") == 0) {}
2420
2421 /* -oo: An ancient flag for old-style addresses which still seems to
2422 crop up in some calls (see in SCO). */
2423
2424 else if (Ustrcmp(argrest, "o") == 0) {}
2425
2426 /* -oP <name>: set pid file path for daemon */
2427
2428 else if (Ustrcmp(argrest, "P") == 0)
2429 override_pid_file_path = argv[++i];
2430
2431 /* -or <n>: set timeout for non-SMTP acceptance
2432 -os <n>: set timeout for SMTP acceptance */
2433
2434 else if (*argrest == 'r' || *argrest == 's')
2435 {
2436 int *tp = (*argrest == 'r')?
2437 &arg_receive_timeout : &arg_smtp_receive_timeout;
2438 if (argrest[1] == 0)
2439 {
2440 if (i+1 < argc) *tp= readconf_readtime(argv[++i], 0, FALSE);
2441 }
2442 else *tp = readconf_readtime(argrest + 1, 0, FALSE);
2443 if (*tp < 0)
2444 {
2445 fprintf(stderr, "exim: bad time value %s: abandoned\n", argv[i]);
2446 exit(EXIT_FAILURE);
2447 }
2448 }
2449
2450 /* -oX <list>: Override local_interfaces and/or default daemon ports */
2451
2452 else if (Ustrcmp(argrest, "X") == 0)
2453 override_local_interfaces = argv[++i];
2454
2455 /* Unknown -o argument */
2456
2457 else badarg = TRUE;
2458 break;
2459
2460
2461 /* -ps: force Perl startup; -pd force delayed Perl startup */
2462
2463 case 'p':
2464 #ifdef EXIM_PERL
2465 if (*argrest == 's' && argrest[1] == 0)
2466 {
2467 perl_start_option = 1;
2468 break;
2469 }
2470 if (*argrest == 'd' && argrest[1] == 0)
2471 {
2472 perl_start_option = -1;
2473 break;
2474 }
2475 #endif
2476
2477 /* -panythingelse is taken as the Sendmail-compatible argument -prval:sval,
2478 which sets the host protocol and host name */
2479
2480 if (*argrest == 0)
2481 {
2482 if (i+1 < argc) argrest = argv[++i]; else
2483 { badarg = TRUE; break; }
2484 }
2485
2486 if (*argrest != 0)
2487 {
2488 uschar *hn = Ustrchr(argrest, ':');
2489 if (hn == NULL)
2490 {
2491 received_protocol = argrest;
2492 }
2493 else
2494 {
2495 received_protocol = string_copyn(argrest, hn - argrest);
2496 sender_host_name = hn + 1;
2497 }
2498 }
2499 break;
2500
2501
2502 case 'q':
2503 receiving_message = FALSE;
2504
2505 /* -qq...: Do queue runs in a 2-stage manner */
2506
2507 if (*argrest == 'q')
2508 {
2509 queue_2stage = TRUE;
2510 argrest++;
2511 }
2512
2513 /* -qi...: Do only first (initial) deliveries */
2514
2515 if (*argrest == 'i')
2516 {
2517 queue_run_first_delivery = TRUE;
2518 argrest++;
2519 }
2520
2521 /* -qf...: Run the queue, forcing deliveries
2522 -qff..: Ditto, forcing thawing as well */
2523
2524 if (*argrest == 'f')
2525 {
2526 queue_run_force = TRUE;
2527 if (*(++argrest) == 'f')
2528 {
2529 deliver_force_thaw = TRUE;
2530 argrest++;
2531 }
2532 }
2533
2534 /* -q[f][f]l...: Run the queue only on local deliveries */
2535
2536 if (*argrest == 'l')
2537 {
2538 queue_run_local = TRUE;
2539 argrest++;
2540 }
2541
2542 /* -q[f][f][l]: Run the queue, optionally forced, optionally local only,
2543 optionally starting from a given message id. */
2544
2545 if (*argrest == 0 &&
2546 (i + 1 >= argc || argv[i+1][0] == '-' || mac_ismsgid(argv[i+1])))
2547 {
2548 queue_interval = 0;
2549 if (i+1 < argc && mac_ismsgid(argv[i+1]))
2550 start_queue_run_id = argv[++i];
2551 if (i+1 < argc && mac_ismsgid(argv[i+1]))
2552 stop_queue_run_id = argv[++i];
2553 }
2554
2555 /* -q[f][f][l]<n>: Run the queue at regular intervals, optionally forced,
2556 optionally local only. */
2557
2558 else
2559 {
2560 if (*argrest != 0)
2561 queue_interval = readconf_readtime(argrest, 0, FALSE);
2562 else
2563 queue_interval = readconf_readtime(argv[++i], 0, FALSE);
2564 if (queue_interval <= 0)
2565 {
2566 fprintf(stderr, "exim: bad time value %s: abandoned\n", argv[i]);
2567 exit(EXIT_FAILURE);
2568 }
2569 }
2570 break;
2571
2572
2573 case 'R': /* Synonymous with -qR... */
2574 receiving_message = FALSE;
2575
2576 /* -Rf: As -R (below) but force all deliveries,
2577 -Rff: Ditto, but also thaw all frozen messages,
2578 -Rr: String is regex
2579 -Rrf: Regex and force
2580 -Rrff: Regex and force and thaw
2581
2582 in all cases provided there are no further characters in this
2583 argument. */
2584
2585 if (*argrest != 0)
2586 {
2587 int i;
2588 for (i = 0; i < sizeof(rsopts)/sizeof(uschar *); i++)
2589 {
2590 if (Ustrcmp(argrest, rsopts[i]) == 0)
2591 {
2592 if (i != 2) queue_run_force = TRUE;
2593 if (i >= 2) deliver_selectstring_regex = TRUE;
2594 if (i == 1 || i == 4) deliver_force_thaw = TRUE;
2595 argrest += Ustrlen(rsopts[i]);
2596 }
2597 }
2598 }
2599
2600 /* -R: Set string to match in addresses for forced queue run to
2601 pick out particular messages. */
2602
2603 if (*argrest == 0)
2604 {
2605 if (i+1 < argc) deliver_selectstring = argv[++i]; else
2606 {
2607 fprintf(stderr, "exim: string expected after -R\n");
2608 exit(EXIT_FAILURE);
2609 }
2610 }
2611 else deliver_selectstring = argrest;
2612 if (queue_interval < 0) queue_interval = 0;
2613 break;
2614
2615
2616 /* -r: an obsolete synonym for -f (see above) */
2617
2618
2619 /* -S: Like -R but works on sender. */
2620
2621 case 'S': /* Synonymous with -qS... */
2622 receiving_message = FALSE;
2623
2624 /* -Sf: As -S (below) but force all deliveries,
2625 -Sff: Ditto, but also thaw all frozen messages,
2626 -Sr: String is regex
2627 -Srf: Regex and force
2628 -Srff: Regex and force and thaw
2629
2630 in all cases provided there are no further characters in this
2631 argument. */
2632
2633 if (*argrest != 0)
2634 {
2635 int i;
2636 for (i = 0; i < sizeof(rsopts)/sizeof(uschar *); i++)
2637 {
2638 if (Ustrcmp(argrest, rsopts[i]) == 0)
2639 {
2640 if (i != 2) queue_run_force = TRUE;
2641 if (i >= 2) deliver_selectstring_sender_regex = TRUE;
2642 if (i == 1 || i == 4) deliver_force_thaw = TRUE;
2643 argrest += Ustrlen(rsopts[i]);
2644 }
2645 }
2646 }
2647
2648 /* -S: Set string to match in addresses for forced queue run to
2649 pick out particular messages. */
2650
2651 if (*argrest == 0)
2652 {
2653 if (i+1 < argc) deliver_selectstring_sender = argv[++i]; else
2654 {
2655 fprintf(stderr, "exim: string expected after -S\n");
2656 exit(EXIT_FAILURE);
2657 }
2658 }
2659 else deliver_selectstring_sender = argrest;
2660 if (queue_interval < 0) queue_interval = 0;
2661 break;
2662
2663 /* -Tqt is an option that is exclusively for use by the testing suite.
2664 It is not recognized in other circumstances. It allows for the setting up
2665 of explicit "queue times" so that various warning/retry things can be
2666 tested. Otherwise variability of clock ticks etc. cause problems. */
2667
2668 case 'T':
2669 if (running_in_test_harness && Ustrcmp(argrest, "qt") == 0)
2670 fudged_queue_times = argv[++i];
2671 else badarg = TRUE;
2672 break;
2673
2674
2675 /* -t: Set flag to extract recipients from body of message. */
2676
2677 case 't':
2678 if (*argrest == 0) extract_recipients = TRUE;
2679
2680 /* -ti: Set flag to extract recipients from body of message, and also
2681 specify that dot does not end the message. */
2682
2683 else if (Ustrcmp(argrest, "i") == 0)
2684 {
2685 extract_recipients = TRUE;
2686 dot_ends = FALSE;
2687 }
2688
2689 /* -tls-on-connect: don't wait for STARTTLS (for old clients) */
2690
2691 #ifdef SUPPORT_TLS
2692 else if (Ustrcmp(argrest, "ls-on-connect") == 0) tls_on_connect = TRUE;
2693 #endif
2694
2695 else badarg = TRUE;
2696 break;
2697
2698
2699 /* -U: This means "initial user submission" in sendmail, apparently. The
2700 doc claims that in future sendmail may refuse syntactically invalid
2701 messages instead of fixing them. For the moment, we just ignore it. */
2702
2703 case 'U':
2704 break;
2705
2706
2707 /* -v: verify things - this is a very low-level debugging */
2708
2709 case 'v':
2710 if (*argrest == 0)
2711 {
2712 debug_selector |= D_v;
2713 debug_file = stderr;
2714 }
2715 else badarg = TRUE;
2716 break;
2717
2718
2719 /* -x: AIX uses this to indicate some fancy 8-bit character stuff:
2720
2721 The -x flag tells the sendmail command that mail from a local
2722 mail program has National Language Support (NLS) extended characters
2723 in the body of the mail item. The sendmail command can send mail with
2724 extended NLS characters across networks that normally corrupts these
2725 8-bit characters.
2726
2727 As Exim is 8-bit clean, it just ignores this flag. */
2728
2729 case 'x':
2730 if (*argrest != 0) badarg = TRUE;
2731 break;
2732
2733 /* All other initial characters are errors */
2734
2735 default:
2736 badarg = TRUE;
2737 break;
2738 } /* End of high-level switch statement */
2739
2740 /* Failed to recognize the option, or syntax error */
2741
2742 if (badarg)
2743 {
2744 fprintf(stderr, "exim abandoned: unknown, malformed, or incomplete "
2745 "option %s\n", arg);
2746 exit(EXIT_FAILURE);
2747 }
2748 }
2749
2750
2751 /* Arguments have been processed. Check for incompatibilities. */
2752
2753 END_ARG:
2754 if ((
2755 (smtp_input || extract_recipients || recipients_arg < argc) &&
2756 (daemon_listen || queue_interval >= 0 || bi_option ||
2757 test_retry_arg >= 0 || test_rewrite_arg >= 0 ||
2758 filter_test != NULL || (msg_action_arg > 0 && !one_msg_action))
2759 ) ||
2760 (
2761 msg_action_arg > 0 &&
2762 (daemon_listen || queue_interval >= 0 || list_options || checking ||
2763 bi_option || test_retry_arg >= 0 || test_rewrite_arg >= 0)
2764 ) ||
2765 (
2766 (daemon_listen || queue_interval >= 0) &&
2767 (sender_address != NULL || list_options || list_queue || checking ||
2768 bi_option)
2769 ) ||
2770 (
2771 daemon_listen && queue_interval == 0
2772 ) ||
2773 (
2774 list_options &&
2775 (checking || smtp_input || extract_recipients ||
2776 filter_test != NULL || bi_option)
2777 ) ||
2778 (
2779 verify_address_mode &&
2780 (address_test_mode || smtp_input || extract_recipients ||
2781 filter_test != NULL || bi_option)
2782 ) ||
2783 (
2784 address_test_mode && (smtp_input || extract_recipients ||
2785 filter_test != NULL || bi_option)
2786 ) ||
2787 (
2788 smtp_input && (sender_address != NULL || filter_test != NULL ||
2789 extract_recipients)
2790 ) ||
2791 (
2792 deliver_selectstring != NULL && queue_interval < 0
2793 )
2794 )
2795 {
2796 fprintf(stderr, "exim: incompatible command-line options or arguments\n");
2797 exit(EXIT_FAILURE);
2798 }
2799
2800 /* If debugging is set up, set the file and the file descriptor to pass on to
2801 child processes. It should, of course, be 2 for stderr. Also, force the daemon
2802 to run in the foreground. */
2803
2804 if (debug_selector != 0)
2805 {
2806 debug_file = stderr;
2807 debug_fd = fileno(debug_file);
2808 background_daemon = FALSE;
2809 if (running_in_test_harness) millisleep(100); /* lets caller finish */
2810 if (debug_selector != D_v) /* -v only doesn't show this */
2811 {
2812 debug_printf("Exim version %s uid=%ld gid=%ld pid=%d D=%x\n",
2813 version_string, (long int)real_uid, (long int)real_gid, (int)getpid(),
2814 debug_selector);
2815 show_whats_supported(stderr);
2816 }
2817 }
2818
2819 /* When started with root privilege, ensure that the limits on the number of
2820 open files and the number of processes (where that is accessible) are
2821 sufficiently large, or are unset, in case Exim has been called from an
2822 environment where the limits are screwed down. Not all OS have the ability to
2823 change some of these limits. */
2824
2825 if (unprivileged)
2826 {
2827 DEBUG(D_any) debug_print_ids(US"Exim has no root privilege:");
2828 }
2829 else
2830 {
2831 struct rlimit rlp;
2832
2833 #ifdef RLIMIT_NOFILE
2834 if (getrlimit(RLIMIT_NOFILE, &rlp) < 0)
2835 {
2836 log_write(0, LOG_MAIN|LOG_PANIC, "getrlimit(RLIMIT_NOFILE) failed: %s",
2837 strerror(errno));
2838 rlp.rlim_cur = rlp.rlim_max = 0;
2839 }
2840
2841 /* I originally chose 1000 as a nice big number that was unlikely to
2842 be exceeded. It turns out that some older OS have a fixed upper limit of
2843 256. */
2844
2845 if (rlp.rlim_cur < 1000)
2846 {
2847 rlp.rlim_cur = rlp.rlim_max = 1000;
2848 if (setrlimit(RLIMIT_NOFILE, &rlp) < 0)
2849 {
2850 rlp.rlim_cur = rlp.rlim_max = 256;
2851 if (setrlimit(RLIMIT_NOFILE, &rlp) < 0)
2852 log_write(0, LOG_MAIN|LOG_PANIC, "setrlimit(RLIMIT_NOFILE) failed: %s",
2853 strerror(errno));
2854 }
2855 }
2856 #endif
2857
2858 #ifdef RLIMIT_NPROC
2859 if (getrlimit(RLIMIT_NPROC, &rlp) < 0)
2860 {
2861 log_write(0, LOG_MAIN|LOG_PANIC, "getrlimit(RLIMIT_NPROC) failed: %s",
2862 strerror(errno));
2863 rlp.rlim_cur = rlp.rlim_max = 0;
2864 }
2865
2866 #ifdef RLIM_INFINITY
2867 if (rlp.rlim_cur != RLIM_INFINITY && rlp.rlim_cur < 1000)
2868 {
2869 rlp.rlim_cur = rlp.rlim_max = RLIM_INFINITY;
2870 #else
2871 if (rlp.rlim_cur < 1000)
2872 {
2873 rlp.rlim_cur = rlp.rlim_max = 1000;
2874 #endif
2875 if (setrlimit(RLIMIT_NPROC, &rlp) < 0)
2876 log_write(0, LOG_MAIN|LOG_PANIC, "setrlimit(RLIMIT_NPROC) failed: %s",
2877 strerror(errno));
2878 }
2879 #endif
2880 }
2881
2882 /* Exim is normally entered as root (but some special configurations are
2883 possible that don't do this). However, it always spins off sub-processes that
2884 set their uid and gid as required for local delivery. We don't want to pass on
2885 any extra groups that root may belong to, so we want to get rid of them all at
2886 this point.
2887
2888 We need to obey setgroups() at this stage, before possibly giving up root
2889 privilege for a changed configuration file, but later on we might need to
2890 check on the additional groups for the admin user privilege - can't do that
2891 till after reading the config, which might specify the exim gid. Therefore,
2892 save the group list here first. */
2893
2894 group_count = getgroups(NGROUPS_MAX, group_list);
2895
2896 /* There is a fundamental difference in some BSD systems in the matter of
2897 groups. FreeBSD and BSDI are known to be different; NetBSD and OpenBSD are
2898 known not to be different. On the "different" systems there is a single group
2899 list, and the first entry in it is the current group. On all other versions of
2900 Unix there is a supplementary group list, which is in *addition* to the current
2901 group. Consequently, to get rid of all extraneous groups on a "standard" system
2902 you pass over 0 groups to setgroups(), while on a "different" system you pass
2903 over a single group - the current group, which is always the first group in the
2904 list. Calling setgroups() with zero groups on a "different" system results in
2905 an error return. The following code should cope with both types of system.
2906
2907 However, if this process isn't running as root, setgroups() can't be used
2908 since you have to be root to run it, even if throwing away groups. Not being
2909 root here happens only in some unusual configurations. We just ignore the
2910 error. */
2911
2912 if (setgroups(0, NULL) != 0)
2913 {
2914 if (setgroups(1, group_list) != 0 && !unprivileged)
2915 {
2916 fprintf(stderr, "exim: setgroups() failed: %s\n", strerror(errno));
2917 exit(EXIT_FAILURE);
2918 }
2919 }
2920
2921 /* If the configuration file name has been altered by an argument on the
2922 command line (either a new file name or a macro definition) and the caller is
2923 not root or the exim user, or if this is a filter testing run, remove any
2924 setuid privilege the program has, and run as the underlying user.
2925
2926 If ALT_CONFIG_ROOT_ONLY is defined, the exim user is locked out of this, which
2927 severely restricts the use of -C for some purposes.
2928
2929 Otherwise, set the real ids to the effective values (should be root unless run
2930 from inetd, which it can either be root or the exim uid, if one is configured).
2931
2932 There is a private mechanism for bypassing some of this, in order to make it
2933 possible to test lots of configurations automatically, without having either to
2934 recompile each time, or to patch in an actual configuration file name and other
2935 values (such as the path name). If running in the test harness, pretend that
2936 configuration file changes and macro definitions haven't happened. */
2937
2938 if (( /* EITHER */
2939 (config_changed || macros != NULL) && /* Config changed, and */
2940 real_uid != root_uid && /* Not root, and */
2941 #ifndef ALT_CONFIG_ROOT_ONLY /* (when not locked out) */
2942 real_uid != exim_uid && /* Not exim, and */
2943 #endif
2944 !running_in_test_harness /* Not fudged */
2945 ) || /* OR */
2946 expansion_test /* expansion testing */
2947 || /* OR */
2948 filter_test != NULL) /* Filter testing */
2949 {
2950 setgroups(group_count, group_list);
2951 exim_setugid(real_uid, real_gid, FALSE,
2952 US"-C, -D, -be or -bf forces real uid");
2953 removed_privilege = TRUE;
2954
2955 /* In the normal case when Exim is called like this, stderr is available
2956 and should be used for any logging information because attempts to write
2957 to the log will usually fail. To arrange this, we unset really_exim. However,
2958 if no stderr is available there is no point - we might as well have a go
2959 at the log (if it fails, syslog will be written). */
2960
2961 if (log_stderr != NULL) really_exim = FALSE;
2962 }
2963
2964 /* Privilege is to be retained for the moment. It may be dropped later,
2965 depending on the job that this Exim process has been asked to do. For now, set
2966 the real uid to the effective so that subsequent re-execs of Exim are done by a
2967 privileged user. */
2968
2969 else exim_setugid(geteuid(), getegid(), FALSE, US"forcing real = effective");
2970
2971 /* If testing a filter, open the file now, before wasting time doing other
2972 setups and reading the message. */
2973
2974 if (filter_test != NULL)
2975 {
2976 filter_fd = Uopen(filter_test, O_RDONLY,0);
2977 if (filter_fd < 0)
2978 {
2979 fprintf(stderr, "exim: failed to open %s: %s\n", filter_test,
2980 strerror(errno));
2981 return EXIT_FAILURE;
2982 }
2983 }
2984
2985 /* Read the main runtime configuration data; this gives up if there
2986 is a failure. It leaves the configuration file open so that the subsequent
2987 configuration data for delivery can be read if needed. */
2988
2989 readconf_main();
2990
2991 /* Handle the decoding of logging options. */
2992
2993 decode_bits(&log_write_selector, &log_extra_selector, log_selector_string,
2994 log_options, log_options_count, US"log");
2995
2996 DEBUG(D_any)
2997 {
2998 debug_printf("configuration file is %s\n", config_main_filename);
2999 debug_printf("log selectors = %08x %08x\n", log_write_selector,
3000 log_extra_selector);
3001 }
3002
3003 /* If domain literals are not allowed, check the sender address that was
3004 supplied with -f. Ditto for a stripped trailing dot. */
3005
3006 if (sender_address != NULL)
3007 {
3008 if (sender_address[sender_address_domain] == '[' && !allow_domain_literals)
3009 {
3010 fprintf(stderr, "exim: bad -f address \"%s\": domain literals not "
3011 "allowed\n", sender_address);
3012 return EXIT_FAILURE;
3013 }
3014 if (f_end_dot && !strip_trailing_dot)
3015 {
3016 fprintf(stderr, "exim: bad -f address \"%s.\": domain is malformed "
3017 "(trailing dot not allowed)\n", sender_address);
3018 return EXIT_FAILURE;
3019 }
3020 }
3021
3022 /* Paranoia check of maximum lengths of certain strings. There is a check
3023 on the length of the log file path in log.c, which will come into effect
3024 if there are any calls to write the log earlier than this. However, if we
3025 get this far but the string is very long, it is better to stop now than to
3026 carry on and (e.g.) receive a message and then have to collapse. The call to
3027 log_write() from here will cause the ultimate panic collapse if the complete
3028 file name exceeds the buffer length. */
3029
3030 if (Ustrlen(log_file_path) > 200)
3031 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3032 "log_file_path is longer than 200 chars: aborting");
3033
3034 if (Ustrlen(pid_file_path) > 200)
3035 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3036 "pid_file_path is longer than 200 chars: aborting");
3037
3038 if (Ustrlen(spool_directory) > 200)
3039 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3040 "spool_directory is longer than 200 chars: aborting");
3041
3042 /* Length check on the process name given to syslog for its TAG field,
3043 which is only permitted to be 32 characters or less. See RFC 3164. */
3044
3045 if (Ustrlen(syslog_processname) > 32)
3046 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3047 "syslog_processname is longer than 32 chars: aborting");
3048
3049 /* In some operating systems, the environment variable TMPDIR controls where
3050 temporary files are created; Exim doesn't use these (apart from when delivering
3051 to MBX mailboxes), but called libraries such as DBM libraries may require them.
3052 If TMPDIR is found in the environment, reset it to the value defined in the
3053 TMPDIR macro, if this macro is defined. */
3054
3055 #ifdef TMPDIR
3056 {
3057 uschar **p;
3058 for (p = USS environ; *p != NULL; p++)
3059 {
3060 if (Ustrncmp(*p, "TMPDIR=", 7) == 0 &&
3061 Ustrcmp(*p+7, TMPDIR) != 0)
3062 {
3063 uschar *newp = malloc(Ustrlen(TMPDIR) + 8);
3064 sprintf(CS newp, "TMPDIR=%s", TMPDIR);
3065 *p = newp;
3066 DEBUG(D_any) debug_printf("reset TMPDIR=%s in environment\n", TMPDIR);
3067 }
3068 }
3069 }
3070 #endif
3071
3072 /* Timezone handling. If timezone_string is "utc", set a flag to cause all
3073 timestamps to be in UTC (gmtime() is used instead of localtime()). Otherwise,
3074 we may need to get rid of a bogus timezone setting. This can arise when Exim is
3075 called by a user who has set the TZ variable. This then affects the timestamps
3076 in log files and in Received: headers, and any created Date: header lines. The
3077 required timezone is settable in the configuration file, so nothing can be done
3078 about this earlier - but hopefully nothing will normally be logged earlier than
3079 this. We have to make a new environment if TZ is wrong, but don't bother if
3080 timestamps_utc is set, because then all times are in UTC anyway. */
3081
3082 if (timezone_string != NULL && strcmpic(timezone_string, US"UTC") == 0)
3083 {
3084 timestamps_utc = TRUE;
3085 }
3086 else
3087 {
3088 uschar *envtz = US getenv("TZ");
3089 if ((envtz == NULL && timezone_string != NULL) ||
3090 (envtz != NULL &&
3091 (timezone_string == NULL ||
3092 Ustrcmp(timezone_string, envtz) != 0)))
3093 {
3094 uschar **p = USS environ;
3095 uschar **new;
3096 uschar **newp;
3097 int count = 0;
3098 while (*p++ != NULL) count++;
3099 if (envtz == NULL) count++;
3100 newp = new = malloc(sizeof(uschar *) * (count + 1));
3101 for (p = USS environ; *p != NULL; p++)
3102 {
3103 if (Ustrncmp(*p, "TZ=", 3) == 0) continue;
3104 *newp++ = *p;
3105 }
3106 if (timezone_string != NULL)
3107 {
3108 *newp = malloc(Ustrlen(timezone_string) + 4);
3109 sprintf(CS *newp++, "TZ=%s", timezone_string);
3110 }
3111 *newp = NULL;
3112 environ = CSS new;
3113 tzset();
3114 DEBUG(D_any) debug_printf("Reset TZ to %s: time is %s\n", timezone_string,
3115 tod_stamp(tod_log));
3116 }
3117 }
3118
3119 /* Handle the case when we have removed the setuid privilege because of -C or
3120 -D. This means that the caller of Exim was not root, and, provided that
3121 ALT_CONFIG_ROOT_ONLY is not defined, was not the Exim user that is built into
3122 the binary.
3123
3124 If ALT_CONFIG_ROOT_ONLY is not defined, there is a problem if it turns out we
3125 were running as the exim user defined in the configuration file (different to
3126 the one in the binary). The sysadmin may expect this case to retain privilege
3127 because "the binary was called by the Exim user", but it hasn't, because of the
3128 order in which it handles this stuff. There are two possibilities:
3129
3130 (1) If deliver_drop_privilege is set, Exim is not going to re-exec in order
3131 to do message deliveries. Thus, the fact that it is running as a
3132 non-privileged user is plausible, and might be wanted in some special
3133 configurations. However, really_exim will have been set false when
3134 privilege was dropped, to stop Exim trying to write to its normal log
3135 files. Therefore, re-enable normal log processing, assuming the sysadmin
3136 has set up the log directory correctly.
3137
3138 (2) If deliver_drop_privilege is not set, the configuration won't work as
3139 apparently intended, and so we log a panic message. In order to retain
3140 root for -C or -D, the caller must either be root or the Exim user
3141 defined in the binary (when deliver_drop_ privilege is false).
3142
3143 If ALT_CONFIG_ROOT_ONLY is defined, we don't know whether we were called by the
3144 built-in exim user or one defined in the configuration. In either event,
3145 re-enable log processing, assuming the sysadmin knows what they are doing. */
3146
3147 if (removed_privilege && (config_changed || macros != NULL) &&
3148 real_uid == exim_uid)
3149 {
3150 #ifdef ALT_CONFIG_ROOT_ONLY
3151 really_exim = TRUE; /* let logging work normally */
3152 #else
3153
3154 if (deliver_drop_privilege)
3155 really_exim = TRUE; /* let logging work normally */
3156 else
3157 log_write(0, LOG_MAIN|LOG_PANIC,
3158 "exim user (uid=%d) is defined only at runtime; privilege lost for %s",
3159 (int)exim_uid, config_changed? "-C" : "-D");
3160 #endif
3161 }
3162
3163 /* Start up Perl interpreter if Perl support is configured and there is a
3164 perl_startup option, and the configuration or the command line specifies
3165 initializing starting. Note that the global variables are actually called
3166 opt_perl_xxx to avoid clashing with perl's namespace (perl_*). */
3167
3168 #ifdef EXIM_PERL
3169 if (perl_start_option != 0)
3170 opt_perl_at_start = (perl_start_option > 0);
3171 if (opt_perl_at_start && opt_perl_startup != NULL)
3172 {
3173 uschar *errstr;
3174 DEBUG(D_any) debug_printf("Starting Perl interpreter\n");
3175 errstr = init_perl(opt_perl_startup);
3176 if (errstr != NULL)
3177 {
3178 fprintf(stderr, "exim: error in perl_startup code: %s\n", errstr);
3179 return EXIT_FAILURE;
3180 }
3181 opt_perl_started = TRUE;
3182 }
3183 #endif /* EXIM_PERL */
3184
3185 /* Log the arguments of the call if the configuration file said so. This is
3186 a debugging feature for finding out what arguments certain MUAs actually use.
3187 Don't attempt it if logging is disabled, or if listing variables or if
3188 verifying/testing addresses or expansions. */
3189
3190 if ((log_extra_selector & LX_arguments) != 0 && really_exim
3191 && !list_options && !checking)
3192 {
3193 int i;
3194 uschar *p = big_buffer;
3195 Ustrcpy(p, "cwd=");
3196 (void)getcwd(CS p+4, big_buffer_size - 4);
3197 while (*p) p++;
3198 (void)string_format(p, big_buffer_size - (p - big_buffer), " %d args:", argc);
3199 while (*p) p++;
3200 for (i = 0; i < argc; i++)
3201 {
3202 int len = Ustrlen(argv[i]);
3203 uschar *printing;
3204 uschar *quote;
3205 if (p + len + 8 >= big_buffer + big_buffer_size)
3206 {
3207 Ustrcpy(p, " ...");
3208 log_write(0, LOG_MAIN, "%s", big_buffer);
3209 Ustrcpy(big_buffer, "...");
3210 p = big_buffer + 3;
3211 }
3212 printing = string_printing(argv[i]);
3213 if (printing[0] == 0) quote = US"\""; else
3214 {
3215 uschar *pp = printing;
3216 quote = US"";
3217 while (*pp != 0) if (isspace(*pp++)) { quote = US"\""; break; }
3218 }
3219 sprintf(CS p, " %s%.*s%s", quote, (int)(big_buffer_size -
3220 (p - big_buffer) - 4), printing, quote);
3221 while (*p) p++;
3222 }
3223 log_write(0, LOG_MAIN, "%s", big_buffer);
3224 }
3225
3226 /* Set the working directory to be the top-level spool directory. We don't rely
3227 on this in the code, which always uses fully qualified names, but it's useful
3228 for core dumps etc. Don't complain if it fails - the spool directory might not
3229 be generally accessible and calls with the -C option (and others) have lost
3230 privilege by now. */
3231
3232 if (Uchdir(spool_directory) != 0)
3233 {
3234 (void)directory_make(spool_directory, US"", SPOOL_DIRECTORY_MODE, TRUE);
3235 (void)Uchdir(spool_directory);
3236 }
3237
3238 /* Handle calls with the -bi option. This is a sendmail option to rebuild *the*
3239 alias file. Exim doesn't have such a concept, but this call is screwed into
3240 Sun's YP makefiles. Handle this by calling a configured script, as the real
3241 user who called Exim. The -oA option can be used to pass an argument to the
3242 script. */
3243
3244 if (bi_option)
3245 {
3246 fclose(config_file);
3247 if (bi_command != NULL)
3248 {
3249 int i = 0;
3250 uschar *argv[3];
3251 argv[i++] = bi_command;
3252 if (alias_arg != NULL) argv[i++] = alias_arg;
3253 argv[i++] = NULL;
3254
3255 setgroups(group_count, group_list);
3256 exim_setugid(real_uid, real_gid, FALSE, US"running bi_command");
3257
3258 DEBUG(D_exec) debug_printf("exec %.256s %.256s\n", argv[0],
3259 (argv[1] == NULL)? US"" : argv[1]);
3260
3261 execv(CS argv[0], (char *const *)argv);
3262 fprintf(stderr, "exim: exec failed: %s\n", strerror(errno));
3263 exit(EXIT_FAILURE);
3264 }
3265 else
3266 {
3267 DEBUG(D_any) debug_printf("-bi used but bi_command not set; exiting\n");
3268 exit(EXIT_SUCCESS);
3269 }
3270 }
3271
3272 /* If an action on specific messages is requested, or if a daemon or queue
3273 runner is being started, we need to know if Exim was called by an admin user.
3274 This is the case if the real user is root or exim, or if the real group is
3275 exim, or if one of the supplementary groups is exim or a group listed in
3276 admin_groups. We don't fail all message actions immediately if not admin_user,
3277 since some actions can be performed by non-admin users. Instead, set admin_user
3278 for later interrogation. */
3279
3280 if (real_uid == root_uid || real_uid == exim_uid || real_gid == exim_gid)
3281 admin_user = TRUE;
3282 else
3283 {
3284 int i, j;
3285
3286 for (i = 0; i < group_count; i++)
3287 {
3288 if (group_list[i] == exim_gid) admin_user = TRUE;
3289 else if (admin_groups != NULL)
3290 {
3291 for (j = 1; j <= (int)(admin_groups[0]); j++)
3292 if (admin_groups[j] == group_list[i])
3293 { admin_user = TRUE; break; }
3294 }
3295 if (admin_user) break;
3296 }
3297 }
3298
3299 /* Another group of privileged users are the trusted users. These are root,
3300 exim, and any caller matching trusted_users or trusted_groups. Trusted callers
3301 are permitted to specify sender_addresses with -f on the command line, and
3302 other message parameters as well. */
3303
3304 if (real_uid == root_uid || real_uid == exim_uid)
3305 trusted_caller = TRUE;
3306 else
3307 {
3308 int i, j;
3309
3310 if (trusted_users != NULL)
3311 {
3312 for (i = 1; i <= (int)(trusted_users[0]); i++)
3313 if (trusted_users[i] == real_uid)
3314 { trusted_caller = TRUE; break; }
3315 }
3316
3317 if (!trusted_caller && trusted_groups != NULL)
3318 {
3319 for (i = 1; i <= (int)(trusted_groups[0]); i++)
3320 {
3321 if (trusted_groups[i] == real_gid)
3322 trusted_caller = TRUE;
3323 else for (j = 0; j < group_count; j++)
3324 {
3325 if (trusted_groups[i] == group_list[j])
3326 { trusted_caller = TRUE; break; }
3327 }
3328 if (trusted_caller) break;
3329 }
3330 }
3331 }
3332
3333 if (trusted_caller) DEBUG(D_any) debug_printf("trusted user\n");
3334 if (admin_user) DEBUG(D_any) debug_printf("admin user\n");
3335
3336 /* Only an admin user may start the daemon or force a queue run in the default
3337 configuration, but the queue run restriction can be relaxed. Only an admin
3338 user may request that a message be returned to its sender forthwith. Only an
3339 admin user may specify a debug level greater than D_v (because it might show
3340 passwords, etc. in lookup queries). Only an admin user may request a queue
3341 count. */
3342
3343 if (!admin_user)
3344 {
3345 BOOL debugset = (debug_selector & ~D_v) != 0;
3346 if (deliver_give_up || daemon_listen ||
3347 (count_queue && queue_list_requires_admin) ||
3348 (list_queue && queue_list_requires_admin) ||
3349 (queue_interval >= 0 && prod_requires_admin) ||
3350 (debugset && !running_in_test_harness))
3351 {
3352 fprintf(stderr, "exim:%s permission denied\n", debugset? " debugging" : "");
3353 exit(EXIT_FAILURE);
3354 }
3355 }
3356
3357 /* If the real user is not root or the exim uid, the argument for passing
3358 in an open TCP/IP connection for another message is not permitted, nor is
3359 running with the -N option for any delivery action, unless this call to exim is
3360 one that supplied an input message, or we are using a patched exim for
3361 regression testing. */
3362
3363 if (real_uid != root_uid && real_uid != exim_uid &&
3364 (continue_hostname != NULL ||
3365 (dont_deliver &&
3366 (queue_interval >= 0 || daemon_listen || msg_action_arg > 0)
3367 )) && !running_in_test_harness)
3368 {
3369 fprintf(stderr, "exim: Permission denied\n");
3370 return EXIT_FAILURE;
3371 }
3372
3373 /* If the caller is not trusted, certain arguments are ignored when running for
3374 real, but are permitted when checking things (-be, -bv, -bt, -bh, -bf). Note
3375 that authority for performing certain actions on messages is tested in the
3376 queue_action() function. */
3377
3378 if (!trusted_caller && !checking && filter_test == NULL)
3379 {
3380 sender_host_name = sender_host_address = interface_address =
3381 sender_ident = received_protocol = NULL;
3382 sender_host_port = interface_port = 0;
3383 sender_host_authenticated = authenticated_sender = authenticated_id = NULL;
3384 }
3385
3386 /* If a sender host address is set, extract the optional port number off the
3387 end of it and check its syntax. Do the same thing for the interface address.
3388 Exim exits if the syntax is bad. */
3389
3390 else
3391 {
3392 if (sender_host_address != NULL)
3393 sender_host_port = check_port(sender_host_address);
3394 if (interface_address != NULL)
3395 interface_port = check_port(interface_address);
3396 }
3397
3398 /* If an SMTP message is being received check to see if the standard input is a
3399 TCP/IP socket. If it is, we assume that Exim was called from inetd if the
3400 caller is root or the Exim user, or if the port is a privileged one. Otherwise,
3401 barf. */
3402
3403 if (smtp_input)
3404 {
3405 union sockaddr_46 inetd_sock;
3406 SOCKLEN_T size = sizeof(inetd_sock);
3407 if (getpeername(0, (struct sockaddr *)(&inetd_sock), &size) == 0)
3408 {
3409 int family = ((struct sockaddr *)(&inetd_sock))->sa_family;
3410 if (family == AF_INET || family == AF_INET6)
3411 {
3412 union sockaddr_46 interface_sock;
3413 size = sizeof(interface_sock);
3414
3415 if (getsockname(0, (struct sockaddr *)(&interface_sock), &size) == 0)
3416 interface_address = host_ntoa(-1, &interface_sock, NULL,
3417 &interface_port);
3418
3419 if (host_is_tls_on_connect_port(interface_port)) tls_on_connect = TRUE;
3420
3421 if (real_uid == root_uid || real_uid == exim_uid || interface_port < 1024)
3422 {
3423 is_inetd = TRUE;
3424 sender_host_address = host_ntoa(-1, (struct sockaddr *)(&inetd_sock),
3425 NULL, &sender_host_port);
3426 if (mua_wrapper) log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Input from "
3427 "inetd is not supported when mua_wrapper is set");
3428 }
3429 else
3430 {
3431 fprintf(stderr,
3432 "exim: Permission denied (unprivileged user, unprivileged port)\n");
3433 return EXIT_FAILURE;
3434 }
3435 }
3436 }
3437 }
3438
3439 /* If the load average is going to be needed while receiving a message, get it
3440 now for those OS that require the first call to os_getloadavg() to be done as
3441 root. There will be further calls later for each message received. */
3442
3443 #ifdef LOAD_AVG_NEEDS_ROOT
3444 if (receiving_message &&
3445 (queue_only_load >= 0 ||
3446 (is_inetd && smtp_load_reserve >= 0)
3447 ))
3448 {
3449 load_average = os_getloadavg();
3450 }
3451 #endif
3452
3453 /* The queue_only configuration option can be overridden by -odx on the command
3454 line, except that if queue_only_override is false, queue_only cannot be unset
3455 from the command line. */
3456
3457 if (queue_only_set && (queue_only_override || arg_queue_only))
3458 queue_only = arg_queue_only;
3459
3460 /* The receive_timeout and smtp_receive_timeout options can be overridden by
3461 -or and -os. */
3462
3463 if (arg_receive_timeout >= 0) receive_timeout = arg_receive_timeout;
3464 if (arg_smtp_receive_timeout >= 0)
3465 smtp_receive_timeout = arg_smtp_receive_timeout;
3466
3467 /* If Exim was started with root privilege, unless we have already removed the
3468 root privilege above as a result of -C, -D, -be, -bf or -bF, remove it now
3469 except when starting the daemon or doing some kind of delivery or address
3470 testing (-bt). These are the only cases when root need to be retained. We run
3471 as exim for -bv and -bh. However, if deliver_drop_privilege is set, root is
3472 retained only for starting the daemon. */
3473
3474 if (!unprivileged && /* originally had root AND */
3475 !removed_privilege && /* still got root AND */
3476 !daemon_listen && /* not starting the daemon */
3477 queue_interval <= 0 && /* (either kind of daemon) */
3478 ( /* AND EITHER */
3479 deliver_drop_privilege || /* requested unprivileged */
3480 ( /* OR */
3481 queue_interval < 0 && /* not running the queue */
3482 (msg_action_arg < 0 || /* and */
3483 msg_action != MSG_DELIVER) && /* not delivering and */
3484 (!checking || !address_test_mode) /* not address checking */
3485 )
3486 ))
3487 {
3488 exim_setugid(exim_uid, exim_gid, FALSE, US"privilege not needed");
3489 }
3490
3491 /* When we are retaining a privileged uid, we still change to the exim gid. */
3492
3493 else setgid(exim_gid);
3494
3495 /* Handle a request to list the delivery queue */
3496
3497 if (list_queue)
3498 {
3499 set_process_info("listing the queue");
3500 queue_list(list_queue_option, argv + recipients_arg, argc - recipients_arg);
3501 exit(EXIT_SUCCESS);
3502 }
3503
3504 /* Handle a request to count the delivery queue */
3505
3506 if (count_queue)
3507 {
3508 set_process_info("counting the queue");
3509 queue_count();
3510 exit(EXIT_SUCCESS);
3511 }
3512
3513 /* Handle actions on specific messages, except for the force delivery action,
3514 which is done below. Some actions take a whole list of message ids, which
3515 are known to continue up to the end of the arguments. Others take a single
3516 message id and then operate on the recipients list. */
3517
3518 if (msg_action_arg > 0 && msg_action != MSG_DELIVER)
3519 {
3520