Compiler masochism compliance.
[exim.git] / src / src / exim.c
1 /* $Cambridge: exim/src/src/exim.c,v 1.71 2010/06/07 00:12:42 pdp Exp $ */
2
3 /*************************************************
4 * Exim - an Internet mail transport agent *
5 *************************************************/
6
7 /* Copyright (c) University of Cambridge 1995 - 2009 */
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 extern void init_lookup_list(void);
18
19
20
21 /*************************************************
22 * Function interface to store functions *
23 *************************************************/
24
25 /* We need some real functions to pass to the PCRE regular expression library
26 for store allocation via Exim's store manager. The normal calls are actually
27 macros that pass over location information to make tracing easier. These
28 functions just interface to the standard macro calls. A good compiler will
29 optimize out the tail recursion and so not make them too expensive. There
30 are two sets of functions; one for use when we want to retain the compiled
31 regular expression for a long time; the other for short-term use. */
32
33 static void *
34 function_store_get(size_t size)
35 {
36 return store_get((int)size);
37 }
38
39 static void
40 function_dummy_free(void *block) { block = block; }
41
42 static void *
43 function_store_malloc(size_t size)
44 {
45 return store_malloc((int)size);
46 }
47
48 static void
49 function_store_free(void *block)
50 {
51 store_free(block);
52 }
53
54
55
56
57 /*************************************************
58 * Compile regular expression and panic on fail *
59 *************************************************/
60
61 /* This function is called when failure to compile a regular expression leads
62 to a panic exit. In other cases, pcre_compile() is called directly. In many
63 cases where this function is used, the results of the compilation are to be
64 placed in long-lived store, so we temporarily reset the store management
65 functions that PCRE uses if the use_malloc flag is set.
66
67 Argument:
68 pattern the pattern to compile
69 caseless TRUE if caseless matching is required
70 use_malloc TRUE if compile into malloc store
71
72 Returns: pointer to the compiled pattern
73 */
74
75 const pcre *
76 regex_must_compile(uschar *pattern, BOOL caseless, BOOL use_malloc)
77 {
78 int offset;
79 int options = PCRE_COPT;
80 const pcre *yield;
81 const uschar *error;
82 if (use_malloc)
83 {
84 pcre_malloc = function_store_malloc;
85 pcre_free = function_store_free;
86 }
87 if (caseless) options |= PCRE_CASELESS;
88 yield = pcre_compile(CS pattern, options, (const char **)&error, &offset, NULL);
89 pcre_malloc = function_store_get;
90 pcre_free = function_dummy_free;
91 if (yield == NULL)
92 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "regular expression error: "
93 "%s at offset %d while compiling %s", error, offset, pattern);
94 return yield;
95 }
96
97
98
99
100 /*************************************************
101 * Execute regular expression and set strings *
102 *************************************************/
103
104 /* This function runs a regular expression match, and sets up the pointers to
105 the matched substrings.
106
107 Arguments:
108 re the compiled expression
109 subject the subject string
110 options additional PCRE options
111 setup if < 0 do full setup
112 if >= 0 setup from setup+1 onwards,
113 excluding the full matched string
114
115 Returns: TRUE or FALSE
116 */
117
118 BOOL
119 regex_match_and_setup(const pcre *re, uschar *subject, int options, int setup)
120 {
121 int ovector[3*(EXPAND_MAXN+1)];
122 int n = pcre_exec(re, NULL, CS subject, Ustrlen(subject), 0,
123 PCRE_EOPT | options, ovector, sizeof(ovector)/sizeof(int));
124 BOOL yield = n >= 0;
125 if (n == 0) n = EXPAND_MAXN + 1;
126 if (yield)
127 {
128 int nn;
129 expand_nmax = (setup < 0)? 0 : setup + 1;
130 for (nn = (setup < 0)? 0 : 2; nn < n*2; nn += 2)
131 {
132 expand_nstring[expand_nmax] = subject + ovector[nn];
133 expand_nlength[expand_nmax++] = ovector[nn+1] - ovector[nn];
134 }
135 expand_nmax--;
136 }
137 return yield;
138 }
139
140
141
142
143 /*************************************************
144 * Handler for SIGUSR1 *
145 *************************************************/
146
147 /* SIGUSR1 causes any exim process to write to the process log details of
148 what it is currently doing. It will only be used if the OS is capable of
149 setting up a handler that causes automatic restarting of any system call
150 that is in progress at the time.
151
152 Argument: the signal number (SIGUSR1)
153 Returns: nothing
154 */
155
156 static void
157 usr1_handler(int sig)
158 {
159 sig = sig; /* Keep picky compilers happy */
160 log_write(0, LOG_PROCESS, "%s", process_info);
161 log_close_all();
162 os_restarting_signal(SIGUSR1, usr1_handler);
163 }
164
165
166
167 /*************************************************
168 * Timeout handler *
169 *************************************************/
170
171 /* This handler is enabled most of the time that Exim is running. The handler
172 doesn't actually get used unless alarm() has been called to set a timer, to
173 place a time limit on a system call of some kind. When the handler is run, it
174 re-enables itself.
175
176 There are some other SIGALRM handlers that are used in special cases when more
177 than just a flag setting is required; for example, when reading a message's
178 input. These are normally set up in the code module that uses them, and the
179 SIGALRM handler is reset to this one afterwards.
180
181 Argument: the signal value (SIGALRM)
182 Returns: nothing
183 */
184
185 void
186 sigalrm_handler(int sig)
187 {
188 sig = sig; /* Keep picky compilers happy */
189 sigalrm_seen = TRUE;
190 os_non_restarting_signal(SIGALRM, sigalrm_handler);
191 }
192
193
194
195 /*************************************************
196 * Sleep for a fractional time interval *
197 *************************************************/
198
199 /* This function is called by millisleep() and exim_wait_tick() to wait for a
200 period of time that may include a fraction of a second. The coding is somewhat
201 tedious. We do not expect setitimer() ever to fail, but if it does, the process
202 will wait for ever, so we panic in this instance. (There was a case of this
203 when a bug in a function that calls milliwait() caused it to pass invalid data.
204 That's when I added the check. :-)
205
206 Argument: an itimerval structure containing the interval
207 Returns: nothing
208 */
209
210 static void
211 milliwait(struct itimerval *itval)
212 {
213 sigset_t sigmask;
214 sigset_t old_sigmask;
215 (void)sigemptyset(&sigmask); /* Empty mask */
216 (void)sigaddset(&sigmask, SIGALRM); /* Add SIGALRM */
217 (void)sigprocmask(SIG_BLOCK, &sigmask, &old_sigmask); /* Block SIGALRM */
218 if (setitimer(ITIMER_REAL, itval, NULL) < 0) /* Start timer */
219 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
220 "setitimer() failed: %s", strerror(errno));
221 (void)sigfillset(&sigmask); /* All signals */
222 (void)sigdelset(&sigmask, SIGALRM); /* Remove SIGALRM */
223 (void)sigsuspend(&sigmask); /* Until SIGALRM */
224 (void)sigprocmask(SIG_SETMASK, &old_sigmask, NULL); /* Restore mask */
225 }
226
227
228
229
230 /*************************************************
231 * Millisecond sleep function *
232 *************************************************/
233
234 /* The basic sleep() function has a granularity of 1 second, which is too rough
235 in some cases - for example, when using an increasing delay to slow down
236 spammers.
237
238 Argument: number of millseconds
239 Returns: nothing
240 */
241
242 void
243 millisleep(int msec)
244 {
245 struct itimerval itval;
246 itval.it_interval.tv_sec = 0;
247 itval.it_interval.tv_usec = 0;
248 itval.it_value.tv_sec = msec/1000;
249 itval.it_value.tv_usec = (msec % 1000) * 1000;
250 milliwait(&itval);
251 }
252
253
254
255 /*************************************************
256 * Compare microsecond times *
257 *************************************************/
258
259 /*
260 Arguments:
261 tv1 the first time
262 tv2 the second time
263
264 Returns: -1, 0, or +1
265 */
266
267 int
268 exim_tvcmp(struct timeval *t1, struct timeval *t2)
269 {
270 if (t1->tv_sec > t2->tv_sec) return +1;
271 if (t1->tv_sec < t2->tv_sec) return -1;
272 if (t1->tv_usec > t2->tv_usec) return +1;
273 if (t1->tv_usec < t2->tv_usec) return -1;
274 return 0;
275 }
276
277
278
279
280 /*************************************************
281 * Clock tick wait function *
282 *************************************************/
283
284 /* Exim uses a time + a pid to generate a unique identifier in two places: its
285 message IDs, and in file names for maildir deliveries. Because some OS now
286 re-use pids within the same second, sub-second times are now being used.
287 However, for absolute certaintly, we must ensure the clock has ticked before
288 allowing the relevant process to complete. At the time of implementation of
289 this code (February 2003), the speed of processors is such that the clock will
290 invariably have ticked already by the time a process has done its job. This
291 function prepares for the time when things are faster - and it also copes with
292 clocks that go backwards.
293
294 Arguments:
295 then_tv A timeval which was used to create uniqueness; its usec field
296 has been rounded down to the value of the resolution.
297 We want to be sure the current time is greater than this.
298 resolution The resolution that was used to divide the microseconds
299 (1 for maildir, larger for message ids)
300
301 Returns: nothing
302 */
303
304 void
305 exim_wait_tick(struct timeval *then_tv, int resolution)
306 {
307 struct timeval now_tv;
308 long int now_true_usec;
309
310 (void)gettimeofday(&now_tv, NULL);
311 now_true_usec = now_tv.tv_usec;
312 now_tv.tv_usec = (now_true_usec/resolution) * resolution;
313
314 if (exim_tvcmp(&now_tv, then_tv) <= 0)
315 {
316 struct itimerval itval;
317 itval.it_interval.tv_sec = 0;
318 itval.it_interval.tv_usec = 0;
319 itval.it_value.tv_sec = then_tv->tv_sec - now_tv.tv_sec;
320 itval.it_value.tv_usec = then_tv->tv_usec + resolution - now_true_usec;
321
322 /* We know that, overall, "now" is less than or equal to "then". Therefore, a
323 negative value for the microseconds is possible only in the case when "now"
324 is more than a second less than "then". That means that itval.it_value.tv_sec
325 is greater than zero. The following correction is therefore safe. */
326
327 if (itval.it_value.tv_usec < 0)
328 {
329 itval.it_value.tv_usec += 1000000;
330 itval.it_value.tv_sec -= 1;
331 }
332
333 DEBUG(D_transport|D_receive)
334 {
335 if (!running_in_test_harness)
336 {
337 debug_printf("tick check: %lu.%06lu %lu.%06lu\n",
338 then_tv->tv_sec, then_tv->tv_usec, now_tv.tv_sec, now_tv.tv_usec);
339 debug_printf("waiting %lu.%06lu\n", itval.it_value.tv_sec,
340 itval.it_value.tv_usec);
341 }
342 }
343
344 milliwait(&itval);
345 }
346 }
347
348
349
350
351 /*************************************************
352 * Set up processing details *
353 *************************************************/
354
355 /* Save a text string for dumping when SIGUSR1 is received.
356 Do checks for overruns.
357
358 Arguments: format and arguments, as for printf()
359 Returns: nothing
360 */
361
362 void
363 set_process_info(const char *format, ...)
364 {
365 int len;
366 va_list ap;
367 sprintf(CS process_info, "%5d ", (int)getpid());
368 len = Ustrlen(process_info);
369 va_start(ap, format);
370 if (!string_vformat(process_info + len, PROCESS_INFO_SIZE - len, format, ap))
371 Ustrcpy(process_info + len, "**** string overflowed buffer ****");
372 DEBUG(D_process_info) debug_printf("set_process_info: %s\n", process_info);
373 va_end(ap);
374 }
375
376
377
378
379
380 /*************************************************
381 * Call fopen() with umask 777 and adjust mode *
382 *************************************************/
383
384 /* Exim runs with umask(0) so that files created with open() have the mode that
385 is specified in the open() call. However, there are some files, typically in
386 the spool directory, that are created with fopen(). They end up world-writeable
387 if no precautions are taken. Although the spool directory is not accessible to
388 the world, this is an untidiness. So this is a wrapper function for fopen()
389 that sorts out the mode of the created file.
390
391 Arguments:
392 filename the file name
393 options the fopen() options
394 mode the required mode
395
396 Returns: the fopened FILE or NULL
397 */
398
399 FILE *
400 modefopen(const uschar *filename, const char *options, mode_t mode)
401 {
402 mode_t saved_umask = umask(0777);
403 FILE *f = Ufopen(filename, options);
404 (void)umask(saved_umask);
405 if (f != NULL) (void)fchmod(fileno(f), mode);
406 return f;
407 }
408
409
410
411
412 /*************************************************
413 * Ensure stdin, stdout, and stderr exist *
414 *************************************************/
415
416 /* Some operating systems grumble if an exec() happens without a standard
417 input, output, and error (fds 0, 1, 2) being defined. The worry is that some
418 file will be opened and will use these fd values, and then some other bit of
419 code will assume, for example, that it can write error messages to stderr.
420 This function ensures that fds 0, 1, and 2 are open if they do not already
421 exist, by connecting them to /dev/null.
422
423 This function is also used to ensure that std{in,out,err} exist at all times,
424 so that if any library that Exim calls tries to use them, it doesn't crash.
425
426 Arguments: None
427 Returns: Nothing
428 */
429
430 void
431 exim_nullstd(void)
432 {
433 int i;
434 int devnull = -1;
435 struct stat statbuf;
436 for (i = 0; i <= 2; i++)
437 {
438 if (fstat(i, &statbuf) < 0 && errno == EBADF)
439 {
440 if (devnull < 0) devnull = open("/dev/null", O_RDWR);
441 if (devnull < 0) log_write(0, LOG_MAIN|LOG_PANIC_DIE, "%s",
442 string_open_failed(errno, "/dev/null"));
443 if (devnull != i) (void)dup2(devnull, i);
444 }
445 }
446 if (devnull > 2) (void)close(devnull);
447 }
448
449
450
451
452 /*************************************************
453 * Close unwanted file descriptors for delivery *
454 *************************************************/
455
456 /* This function is called from a new process that has been forked to deliver
457 an incoming message, either directly, or using exec.
458
459 We want any smtp input streams to be closed in this new process. However, it
460 has been observed that using fclose() here causes trouble. When reading in -bS
461 input, duplicate copies of messages have been seen. The files will be sharing a
462 file pointer with the parent process, and it seems that fclose() (at least on
463 some systems - I saw this on Solaris 2.5.1) messes with that file pointer, at
464 least sometimes. Hence we go for closing the underlying file descriptors.
465
466 If TLS is active, we want to shut down the TLS library, but without molesting
467 the parent's SSL connection.
468
469 For delivery of a non-SMTP message, we want to close stdin and stdout (and
470 stderr unless debugging) because the calling process might have set them up as
471 pipes and be waiting for them to close before it waits for the submission
472 process to terminate. If they aren't closed, they hold up the calling process
473 until the initial delivery process finishes, which is not what we want.
474
475 Exception: We do want it for synchronous delivery!
476
477 And notwithstanding all the above, if D_resolver is set, implying resolver
478 debugging, leave stdout open, because that's where the resolver writes its
479 debugging output.
480
481 When we close stderr (which implies we've also closed stdout), we also get rid
482 of any controlling terminal.
483
484 Arguments: None
485 Returns: Nothing
486 */
487
488 static void
489 close_unwanted(void)
490 {
491 if (smtp_input)
492 {
493 #ifdef SUPPORT_TLS
494 tls_close(FALSE); /* Shut down the TLS library */
495 #endif
496 (void)close(fileno(smtp_in));
497 (void)close(fileno(smtp_out));
498 smtp_in = NULL;
499 }
500 else
501 {
502 (void)close(0); /* stdin */
503 if ((debug_selector & D_resolver) == 0) (void)close(1); /* stdout */
504 if (debug_selector == 0) /* stderr */
505 {
506 if (!synchronous_delivery)
507 {
508 (void)close(2);
509 log_stderr = NULL;
510 }
511 (void)setsid();
512 }
513 }
514 }
515
516
517
518
519 /*************************************************
520 * Set uid and gid *
521 *************************************************/
522
523 /* This function sets a new uid and gid permanently, optionally calling
524 initgroups() to set auxiliary groups. There are some special cases when running
525 Exim in unprivileged modes. In these situations the effective uid will not be
526 root; if we already have the right effective uid/gid, and don't need to
527 initialize any groups, leave things as they are.
528
529 Arguments:
530 uid the uid
531 gid the gid
532 igflag TRUE if initgroups() wanted
533 msg text to use in debugging output and failure log
534
535 Returns: nothing; bombs out on failure
536 */
537
538 void
539 exim_setugid(uid_t uid, gid_t gid, BOOL igflag, uschar *msg)
540 {
541 uid_t euid = geteuid();
542 gid_t egid = getegid();
543
544 if (euid == root_uid || euid != uid || egid != gid || igflag)
545 {
546 /* At least one OS returns +1 for initgroups failure, so just check for
547 non-zero. */
548
549 if (igflag)
550 {
551 struct passwd *pw = getpwuid(uid);
552 if (pw != NULL)
553 {
554 if (initgroups(pw->pw_name, gid) != 0)
555 log_write(0,LOG_MAIN|LOG_PANIC_DIE,"initgroups failed for uid=%ld: %s",
556 (long int)uid, strerror(errno));
557 }
558 else log_write(0, LOG_MAIN|LOG_PANIC_DIE, "cannot run initgroups(): "
559 "no passwd entry for uid=%ld", (long int)uid);
560 }
561
562 if (setgid(gid) < 0 || setuid(uid) < 0)
563 {
564 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "unable to set gid=%ld or uid=%ld "
565 "(euid=%ld): %s", (long int)gid, (long int)uid, (long int)euid, msg);
566 }
567 }
568
569 /* Debugging output included uid/gid and all groups */
570
571 DEBUG(D_uid)
572 {
573 int group_count, save_errno;
574 gid_t group_list[NGROUPS_MAX];
575 debug_printf("changed uid/gid: %s\n uid=%ld gid=%ld pid=%ld\n", msg,
576 (long int)geteuid(), (long int)getegid(), (long int)getpid());
577 group_count = getgroups(NGROUPS_MAX, group_list);
578 save_errno = errno;
579 debug_printf(" auxiliary group list:");
580 if (group_count > 0)
581 {
582 int i;
583 for (i = 0; i < group_count; i++) debug_printf(" %d", (int)group_list[i]);
584 }
585 else if (group_count < 0)
586 debug_printf(" <error: %s>", strerror(save_errno));
587 else debug_printf(" <none>");
588 debug_printf("\n");
589 }
590 }
591
592
593
594
595 /*************************************************
596 * Exit point *
597 *************************************************/
598
599 /* Exim exits via this function so that it always clears up any open
600 databases.
601
602 Arguments:
603 rc return code
604
605 Returns: does not return
606 */
607
608 void
609 exim_exit(int rc)
610 {
611 search_tidyup();
612 DEBUG(D_any)
613 debug_printf(">>>>>>>>>>>>>>>> Exim pid=%d terminating with rc=%d "
614 ">>>>>>>>>>>>>>>>\n", (int)getpid(), rc);
615 exit(rc);
616 }
617
618
619
620
621 /*************************************************
622 * Extract port from host address *
623 *************************************************/
624
625 /* Called to extract the port from the values given to -oMa and -oMi.
626 It also checks the syntax of the address, and terminates it before the
627 port data when a port is extracted.
628
629 Argument:
630 address the address, with possible port on the end
631
632 Returns: the port, or zero if there isn't one
633 bombs out on a syntax error
634 */
635
636 static int
637 check_port(uschar *address)
638 {
639 int port = host_address_extract_port(address);
640 if (string_is_ip_address(address, NULL) == 0)
641 {
642 fprintf(stderr, "exim abandoned: \"%s\" is not an IP address\n", address);
643 exit(EXIT_FAILURE);
644 }
645 return port;
646 }
647
648
649
650 /*************************************************
651 * Test/verify an address *
652 *************************************************/
653
654 /* This function is called by the -bv and -bt code. It extracts a working
655 address from a full RFC 822 address. This isn't really necessary per se, but it
656 has the effect of collapsing source routes.
657
658 Arguments:
659 s the address string
660 flags flag bits for verify_address()
661 exit_value to be set for failures
662
663 Returns: nothing
664 */
665
666 static void
667 test_address(uschar *s, int flags, int *exit_value)
668 {
669 int start, end, domain;
670 uschar *parse_error = NULL;
671 uschar *address = parse_extract_address(s, &parse_error, &start, &end, &domain,
672 FALSE);
673 if (address == NULL)
674 {
675 fprintf(stdout, "syntax error: %s\n", parse_error);
676 *exit_value = 2;
677 }
678 else
679 {
680 int rc = verify_address(deliver_make_addr(address,TRUE), stdout, flags, -1,
681 -1, -1, NULL, NULL, NULL);
682 if (rc == FAIL) *exit_value = 2;
683 else if (rc == DEFER && *exit_value == 0) *exit_value = 1;
684 }
685 }
686
687
688
689 /*************************************************
690 * Show supported features *
691 *************************************************/
692
693 /* This function is called for -bV/--version and for -d to output the optional
694 features of the current Exim binary.
695
696 Arguments: a FILE for printing
697 Returns: nothing
698 */
699
700 static void
701 show_whats_supported(FILE *f)
702 {
703 #ifdef DB_VERSION_STRING
704 fprintf(f, "Berkeley DB: %s\n", DB_VERSION_STRING);
705 #elif defined(BTREEVERSION) && defined(HASHVERSION)
706 #ifdef USE_DB
707 fprintf(f, "Probably Berkeley DB version 1.8x (native mode)\n");
708 #else
709 fprintf(f, "Probably Berkeley DB version 1.8x (compatibility mode)\n");
710 #endif
711 #elif defined(_DBM_RDONLY) || defined(dbm_dirfno)
712 fprintf(f, "Probably ndbm\n");
713 #elif defined(USE_TDB)
714 fprintf(f, "Using tdb\n");
715 #else
716 #ifdef USE_GDBM
717 fprintf(f, "Probably GDBM (native mode)\n");
718 #else
719 fprintf(f, "Probably GDBM (compatibility mode)\n");
720 #endif
721 #endif
722
723 fprintf(f, "Support for:");
724 #ifdef SUPPORT_CRYPTEQ
725 fprintf(f, " crypteq");
726 #endif
727 #if HAVE_ICONV
728 fprintf(f, " iconv()");
729 #endif
730 #if HAVE_IPV6
731 fprintf(f, " IPv6");
732 #endif
733 #ifdef HAVE_SETCLASSRESOURCES
734 fprintf(f, " use_setclassresources");
735 #endif
736 #ifdef SUPPORT_PAM
737 fprintf(f, " PAM");
738 #endif
739 #ifdef EXIM_PERL
740 fprintf(f, " Perl");
741 #endif
742 #ifdef EXPAND_DLFUNC
743 fprintf(f, " Expand_dlfunc");
744 #endif
745 #ifdef USE_TCP_WRAPPERS
746 fprintf(f, " TCPwrappers");
747 #endif
748 #ifdef SUPPORT_TLS
749 #ifdef USE_GNUTLS
750 fprintf(f, " GnuTLS");
751 #else
752 fprintf(f, " OpenSSL");
753 #endif
754 #endif
755 #ifdef SUPPORT_TRANSLATE_IP_ADDRESS
756 fprintf(f, " translate_ip_address");
757 #endif
758 #ifdef SUPPORT_MOVE_FROZEN_MESSAGES
759 fprintf(f, " move_frozen_messages");
760 #endif
761 #ifdef WITH_CONTENT_SCAN
762 fprintf(f, " Content_Scanning");
763 #endif
764 #ifndef DISABLE_DKIM
765 fprintf(f, " DKIM");
766 #endif
767 #ifdef WITH_OLD_DEMIME
768 fprintf(f, " Old_Demime");
769 #endif
770 #ifdef EXPERIMENTAL_SPF
771 fprintf(f, " Experimental_SPF");
772 #endif
773 #ifdef EXPERIMENTAL_SRS
774 fprintf(f, " Experimental_SRS");
775 #endif
776 #ifdef EXPERIMENTAL_BRIGHTMAIL
777 fprintf(f, " Experimental_Brightmail");
778 #endif
779 #ifdef EXPERIMENTAL_DCC
780 fprintf(f, " Experimental_DCC");
781 #endif
782 fprintf(f, "\n");
783
784 fprintf(f, "Lookups (built-in):");
785 #if defined(LOOKUP_LSEARCH) && LOOKUP_LSEARCH!=2
786 fprintf(f, " lsearch wildlsearch nwildlsearch iplsearch");
787 #endif
788 #if defined(LOOKUP_CDB) && LOOKUP_CDB!=2
789 fprintf(f, " cdb");
790 #endif
791 #if defined(LOOKUP_DBM) && LOOKUP_DBM!=2
792 fprintf(f, " dbm dbmnz");
793 #endif
794 #if defined(LOOKUP_DNSDB) && LOOKUP_DNSDB!=2
795 fprintf(f, " dnsdb");
796 #endif
797 #if defined(LOOKUP_DSEARCH) && LOOKUP_DSEARCH!=2
798 fprintf(f, " dsearch");
799 #endif
800 #if defined(LOOKUP_IBASE) && LOOKUP_IBASE!=2
801 fprintf(f, " ibase");
802 #endif
803 #if defined(LOOKUP_LDAP) && LOOKUP_LDAP!=2
804 fprintf(f, " ldap ldapdn ldapm");
805 #endif
806 #if defined(LOOKUP_MYSQL) && LOOKUP_MYSQL!=2
807 fprintf(f, " mysql");
808 #endif
809 #if defined(LOOKUP_NIS) && LOOKUP_NIS!=2
810 fprintf(f, " nis nis0");
811 #endif
812 #if defined(LOOKUP_NISPLUS) && LOOKUP_NISPLUS!=2
813 fprintf(f, " nisplus");
814 #endif
815 #if defined(LOOKUP_ORACLE) && LOOKUP_ORACLE!=2
816 fprintf(f, " oracle");
817 #endif
818 #if defined(LOOKUP_PASSWD) && LOOKUP_PASSWD!=2
819 fprintf(f, " passwd");
820 #endif
821 #if defined(LOOKUP_PGSQL) && LOOKUP_PGSQL!=2
822 fprintf(f, " pgsql");
823 #endif
824 #if defined(LOOKUP_SQLITE) && LOOKUP_SQLITE!=2
825 fprintf(f, " sqlite");
826 #endif
827 #if defined(LOOKUP_TESTDB) && LOOKUP_TESTDB!=2
828 fprintf(f, " testdb");
829 #endif
830 #if defined(LOOKUP_WHOSON) && LOOKUP_WHOSON!=2
831 fprintf(f, " whoson");
832 #endif
833 fprintf(f, "\n");
834
835 fprintf(f, "Authenticators:");
836 #ifdef AUTH_CRAM_MD5
837 fprintf(f, " cram_md5");
838 #endif
839 #ifdef AUTH_CYRUS_SASL
840 fprintf(f, " cyrus_sasl");
841 #endif
842 #ifdef AUTH_DOVECOT
843 fprintf(f, " dovecot");
844 #endif
845 #ifdef AUTH_PLAINTEXT
846 fprintf(f, " plaintext");
847 #endif
848 #ifdef AUTH_SPA
849 fprintf(f, " spa");
850 #endif
851 fprintf(f, "\n");
852
853 fprintf(f, "Routers:");
854 #ifdef ROUTER_ACCEPT
855 fprintf(f, " accept");
856 #endif
857 #ifdef ROUTER_DNSLOOKUP
858 fprintf(f, " dnslookup");
859 #endif
860 #ifdef ROUTER_IPLITERAL
861 fprintf(f, " ipliteral");
862 #endif
863 #ifdef ROUTER_IPLOOKUP
864 fprintf(f, " iplookup");
865 #endif
866 #ifdef ROUTER_MANUALROUTE
867 fprintf(f, " manualroute");
868 #endif
869 #ifdef ROUTER_QUERYPROGRAM
870 fprintf(f, " queryprogram");
871 #endif
872 #ifdef ROUTER_REDIRECT
873 fprintf(f, " redirect");
874 #endif
875 fprintf(f, "\n");
876
877 fprintf(f, "Transports:");
878 #ifdef TRANSPORT_APPENDFILE
879 fprintf(f, " appendfile");
880 #ifdef SUPPORT_MAILDIR
881 fprintf(f, "/maildir");
882 #endif
883 #ifdef SUPPORT_MAILSTORE
884 fprintf(f, "/mailstore");
885 #endif
886 #ifdef SUPPORT_MBX
887 fprintf(f, "/mbx");
888 #endif
889 #endif
890 #ifdef TRANSPORT_AUTOREPLY
891 fprintf(f, " autoreply");
892 #endif
893 #ifdef TRANSPORT_LMTP
894 fprintf(f, " lmtp");
895 #endif
896 #ifdef TRANSPORT_PIPE
897 fprintf(f, " pipe");
898 #endif
899 #ifdef TRANSPORT_SMTP
900 fprintf(f, " smtp");
901 #endif
902 fprintf(f, "\n");
903
904 if (fixed_never_users[0] > 0)
905 {
906 int i;
907 fprintf(f, "Fixed never_users: ");
908 for (i = 1; i <= (int)fixed_never_users[0] - 1; i++)
909 fprintf(f, "%d:", (unsigned int)fixed_never_users[i]);
910 fprintf(f, "%d\n", (unsigned int)fixed_never_users[i]);
911 }
912
913 fprintf(f, "Size of off_t: " SIZE_T_FMT "\n", sizeof(off_t));
914
915 /* This runtime check is to help diagnose library linkage mismatches which
916 result in segfaults and the like; as such, it's left until the end,
917 just in case. There will still be a "Configuration file is" line still to
918 come. */
919 #ifdef SUPPORT_TLS
920 tls_version_report(f);
921 #endif
922
923 /* Everything else is details which are only worth reporting when debugging.
924 Perhaps the tls_version_report should move into this too. */
925 DEBUG(D_any) do {
926
927 int i;
928
929 #ifdef AUTH_CYRUS_SASL
930 auth_cyrus_sasl_version_report(f);
931 #endif
932
933 fprintf(f, "Library version: PCRE: Compile: %d.%d%s\n"
934 " Runtime: %s\n",
935 PCRE_MAJOR, PCRE_MINOR,
936 /* PRE_PRERELEASE is either defined and empty or a string.
937 * unless its an ancient version of PCRE in which case it
938 * is not defined */
939 #ifdef PCRE_PRERELEASE
940 PCRE_PRERELEASE "",
941 #else
942 "",
943 #endif
944 pcre_version());
945
946 init_lookup_list();
947 for (i = 0; i < lookup_list_count; i++)
948 {
949 if (lookup_list[i]->version_report)
950 lookup_list[i]->version_report(f);
951 }
952
953 #ifdef WHITELIST_D_MACROS
954 fprintf(f, "WHITELIST_D_MACROS: \"%s\"\n", WHITELIST_D_MACROS);
955 #else
956 fprintf(f, "WHITELIST_D_MACROS unset\n");
957 #endif
958 #ifdef TRUSTED_CONFIG_LIST
959 fprintf(f, "TRUSTED_CONFIG_LIST: \"%s\"\n", TRUSTED_CONFIG_LIST);
960 #else
961 fprintf(f, "TRUSTED_CONFIG_LIST unset\n");
962 #endif
963
964 } while (0);
965 }
966
967
968
969
970 /*************************************************
971 * Quote a local part *
972 *************************************************/
973
974 /* This function is used when a sender address or a From: or Sender: header
975 line is being created from the caller's login, or from an authenticated_id. It
976 applies appropriate quoting rules for a local part.
977
978 Argument: the local part
979 Returns: the local part, quoted if necessary
980 */
981
982 uschar *
983 local_part_quote(uschar *lpart)
984 {
985 BOOL needs_quote = FALSE;
986 int size, ptr;
987 uschar *yield;
988 uschar *t;
989
990 for (t = lpart; !needs_quote && *t != 0; t++)
991 {
992 needs_quote = !isalnum(*t) && strchr("!#$%&'*+-/=?^_`{|}~", *t) == NULL &&
993 (*t != '.' || t == lpart || t[1] == 0);
994 }
995
996 if (!needs_quote) return lpart;
997
998 size = ptr = 0;
999 yield = string_cat(NULL, &size, &ptr, US"\"", 1);
1000
1001 for (;;)
1002 {
1003 uschar *nq = US Ustrpbrk(lpart, "\\\"");
1004 if (nq == NULL)
1005 {
1006 yield = string_cat(yield, &size, &ptr, lpart, Ustrlen(lpart));
1007 break;
1008 }
1009 yield = string_cat(yield, &size, &ptr, lpart, nq - lpart);
1010 yield = string_cat(yield, &size, &ptr, US"\\", 1);
1011 yield = string_cat(yield, &size, &ptr, nq, 1);
1012 lpart = nq + 1;
1013 }
1014
1015 yield = string_cat(yield, &size, &ptr, US"\"", 1);
1016 yield[ptr] = 0;
1017 return yield;
1018 }
1019
1020
1021
1022 #ifdef USE_READLINE
1023 /*************************************************
1024 * Load readline() functions *
1025 *************************************************/
1026
1027 /* This function is called from testing executions that read data from stdin,
1028 but only when running as the calling user. Currently, only -be does this. The
1029 function loads the readline() function library and passes back the functions.
1030 On some systems, it needs the curses library, so load that too, but try without
1031 it if loading fails. All this functionality has to be requested at build time.
1032
1033 Arguments:
1034 fn_readline_ptr pointer to where to put the readline pointer
1035 fn_addhist_ptr pointer to where to put the addhistory function
1036
1037 Returns: the dlopen handle or NULL on failure
1038 */
1039
1040 static void *
1041 set_readline(char * (**fn_readline_ptr)(const char *),
1042 void (**fn_addhist_ptr)(const char *))
1043 {
1044 void *dlhandle;
1045 void *dlhandle_curses = dlopen("libcurses.so", RTLD_GLOBAL|RTLD_LAZY);
1046
1047 dlhandle = dlopen("libreadline.so", RTLD_GLOBAL|RTLD_NOW);
1048 if (dlhandle_curses != NULL) dlclose(dlhandle_curses);
1049
1050 if (dlhandle != NULL)
1051 {
1052 /* Checked manual pages; at least in GNU Readline 6.1, the prototypes are:
1053 * char * readline (const char *prompt);
1054 * void add_history (const char *string);
1055 */
1056 *fn_readline_ptr = (char *(*)(const char*))dlsym(dlhandle, "readline");
1057 *fn_addhist_ptr = (void(*)(const char*))dlsym(dlhandle, "add_history");
1058 }
1059 else
1060 {
1061 DEBUG(D_any) debug_printf("failed to load readline: %s\n", dlerror());
1062 }
1063
1064 return dlhandle;
1065 }
1066 #endif
1067
1068
1069
1070 /*************************************************
1071 * Get a line from stdin for testing things *
1072 *************************************************/
1073
1074 /* This function is called when running tests that can take a number of lines
1075 of input (for example, -be and -bt). It handles continuations and trailing
1076 spaces. And prompting and a blank line output on eof. If readline() is in use,
1077 the arguments are non-NULL and provide the relevant functions.
1078
1079 Arguments:
1080 fn_readline readline function or NULL
1081 fn_addhist addhist function or NULL
1082
1083 Returns: pointer to dynamic memory, or NULL at end of file
1084 */
1085
1086 static uschar *
1087 get_stdinput(char *(*fn_readline)(const char *), void(*fn_addhist)(const char *))
1088 {
1089 int i;
1090 int size = 0;
1091 int ptr = 0;
1092 uschar *yield = NULL;
1093
1094 if (fn_readline == NULL) { printf("> "); fflush(stdout); }
1095
1096 for (i = 0;; i++)
1097 {
1098 uschar buffer[1024];
1099 uschar *p, *ss;
1100
1101 #ifdef USE_READLINE
1102 char *readline_line = NULL;
1103 if (fn_readline != NULL)
1104 {
1105 if ((readline_line = fn_readline((i > 0)? "":"> ")) == NULL) break;
1106 if (*readline_line != 0 && fn_addhist != NULL) fn_addhist(readline_line);
1107 p = US readline_line;
1108 }
1109 else
1110 #endif
1111
1112 /* readline() not in use */
1113
1114 {
1115 if (Ufgets(buffer, sizeof(buffer), stdin) == NULL) break;
1116 p = buffer;
1117 }
1118
1119 /* Handle the line */
1120
1121 ss = p + (int)Ustrlen(p);
1122 while (ss > p && isspace(ss[-1])) ss--;
1123
1124 if (i > 0)
1125 {
1126 while (p < ss && isspace(*p)) p++; /* leading space after cont */
1127 }
1128
1129 yield = string_cat(yield, &size, &ptr, p, ss - p);
1130
1131 #ifdef USE_READLINE
1132 if (fn_readline != NULL) free(readline_line);
1133 #endif
1134
1135 if (ss == p || yield[ptr-1] != '\\')
1136 {
1137 yield[ptr] = 0;
1138 break;
1139 }
1140 yield[--ptr] = 0;
1141 }
1142
1143 if (yield == NULL) printf("\n");
1144 return yield;
1145 }
1146
1147
1148
1149 /*************************************************
1150 * Output usage information for the program *
1151 *************************************************/
1152
1153 /* This function is called when there are no recipients
1154 or a specific --help argument was added.
1155
1156 Arguments:
1157 progname information on what name we were called by
1158
1159 Returns: DOES NOT RETURN
1160 */
1161
1162 static void
1163 exim_usage(uschar *progname)
1164 {
1165
1166 /* Handle specific program invocation varients */
1167 if (Ustrcmp(progname, US"-mailq") == 0)
1168 {
1169 fprintf(stderr,
1170 "mailq - list the contents of the mail queue\n\n"
1171 "For a list of options, see the Exim documentation.\n");
1172 exit(EXIT_FAILURE);
1173 }
1174
1175 /* Generic usage - we output this whatever happens */
1176 fprintf(stderr,
1177 "Exim is a Mail Transfer Agent. It is normally called by Mail User Agents,\n"
1178 "not directly from a shell command line. Options and/or arguments control\n"
1179 "what it does when called. For a list of options, see the Exim documentation.\n");
1180
1181 exit(EXIT_FAILURE);
1182 }
1183
1184
1185
1186 /*************************************************
1187 * Validate that the macros given are okay *
1188 *************************************************/
1189
1190 /* Typically, Exim will drop privileges if macros are supplied. In some
1191 cases, we want to not do so.
1192
1193 Arguments: none (macros is a global)
1194 Returns: true if trusted, false otherwise
1195 */
1196
1197 static BOOL
1198 macros_trusted(void)
1199 {
1200 #ifdef WHITELIST_D_MACROS
1201 macro_item *m;
1202 uschar *whitelisted, *end, *p, **whites, **w;
1203 int white_count, i, n;
1204 size_t len;
1205 BOOL prev_char_item, found;
1206 #endif
1207
1208 if (macros == NULL)
1209 return TRUE;
1210 #ifndef WHITELIST_D_MACROS
1211 return FALSE;
1212 #else
1213
1214 /* We only trust -D overrides for some invoking users:
1215 root, the exim run-time user, the optional config owner user.
1216 I don't know why config-owner would be needed, but since they can own the
1217 config files anyway, there's no security risk to letting them override -D. */
1218 if ( ! ((real_uid == root_uid)
1219 || (real_uid == exim_uid)
1220 #ifdef CONFIGURE_OWNER
1221 || (real_uid == config_uid)
1222 #endif
1223 ))
1224 {
1225 debug_printf("macros_trusted rejecting macros for uid %d\n", (int) real_uid);
1226 return FALSE;
1227 }
1228
1229 /* Get a list of macros which are whitelisted */
1230 whitelisted = string_copy_malloc(US WHITELIST_D_MACROS);
1231 prev_char_item = FALSE;
1232 white_count = 0;
1233 for (p = whitelisted; *p != '\0'; ++p)
1234 {
1235 if (*p == ':' || isspace(*p))
1236 {
1237 *p = '\0';
1238 if (prev_char_item)
1239 ++white_count;
1240 prev_char_item = FALSE;
1241 continue;
1242 }
1243 if (!prev_char_item)
1244 prev_char_item = TRUE;
1245 }
1246 end = p;
1247 if (prev_char_item)
1248 ++white_count;
1249 if (!white_count)
1250 return FALSE;
1251 whites = store_malloc(sizeof(uschar *) * (white_count+1));
1252 for (p = whitelisted, i = 0; (p != end) && (i < white_count); ++p)
1253 {
1254 if (*p != '\0')
1255 {
1256 whites[i++] = p;
1257 if (i == white_count)
1258 break;
1259 while (*p != '\0' && p < end)
1260 ++p;
1261 }
1262 }
1263 whites[i] = NULL;
1264
1265 /* The list of macros should be very short. Accept the N*M complexity. */
1266 for (m = macros; m != NULL; m = m->next)
1267 {
1268 found = FALSE;
1269 for (w = whites; *w; ++w)
1270 if (Ustrcmp(*w, m->name) == 0)
1271 {
1272 found = TRUE;
1273 break;
1274 }
1275 if (!found)
1276 return FALSE;
1277 if (m->replacement == NULL)
1278 continue;
1279 len = Ustrlen(m->replacement);
1280 if (len == 0)
1281 continue;
1282 n = pcre_exec(regex_whitelisted_macro, NULL, CS m->replacement, len,
1283 0, PCRE_EOPT, NULL, 0);
1284 if (n < 0)
1285 {
1286 if (n != PCRE_ERROR_NOMATCH)
1287 debug_printf("macros_trusted checking %s returned %d\n", m->name, n);
1288 return FALSE;
1289 }
1290 }
1291 DEBUG(D_any) debug_printf("macros_trusted overriden to true by whitelisting\n");
1292 return TRUE;
1293 #endif
1294 }
1295
1296
1297 /*************************************************
1298 * Entry point and high-level code *
1299 *************************************************/
1300
1301 /* Entry point for the Exim mailer. Analyse the arguments and arrange to take
1302 the appropriate action. All the necessary functions are present in the one
1303 binary. I originally thought one should split it up, but it turns out that so
1304 much of the apparatus is needed in each chunk that one might as well just have
1305 it all available all the time, which then makes the coding easier as well.
1306
1307 Arguments:
1308 argc count of entries in argv
1309 argv argument strings, with argv[0] being the program name
1310
1311 Returns: EXIT_SUCCESS if terminated successfully
1312 EXIT_FAILURE otherwise, except when a message has been sent
1313 to the sender, and -oee was given
1314 */
1315
1316 int
1317 main(int argc, char **cargv)
1318 {
1319 uschar **argv = USS cargv;
1320 int arg_receive_timeout = -1;
1321 int arg_smtp_receive_timeout = -1;
1322 int arg_error_handling = error_handling;
1323 int filter_sfd = -1;
1324 int filter_ufd = -1;
1325 int group_count;
1326 int i, rv;
1327 int list_queue_option = 0;
1328 int msg_action = 0;
1329 int msg_action_arg = -1;
1330 int namelen = (argv[0] == NULL)? 0 : Ustrlen(argv[0]);
1331 int queue_only_reason = 0;
1332 #ifdef EXIM_PERL
1333 int perl_start_option = 0;
1334 #endif
1335 int recipients_arg = argc;
1336 int sender_address_domain = 0;
1337 int test_retry_arg = -1;
1338 int test_rewrite_arg = -1;
1339 BOOL arg_queue_only = FALSE;
1340 BOOL bi_option = FALSE;
1341 BOOL checking = FALSE;
1342 BOOL count_queue = FALSE;
1343 BOOL expansion_test = FALSE;
1344 BOOL extract_recipients = FALSE;
1345 BOOL forced_delivery = FALSE;
1346 BOOL f_end_dot = FALSE;
1347 BOOL deliver_give_up = FALSE;
1348 BOOL list_queue = FALSE;
1349 BOOL list_options = FALSE;
1350 BOOL local_queue_only;
1351 BOOL more = TRUE;
1352 BOOL one_msg_action = FALSE;
1353 BOOL queue_only_set = FALSE;
1354 BOOL receiving_message = TRUE;
1355 BOOL sender_ident_set = FALSE;
1356 BOOL session_local_queue_only;
1357 BOOL unprivileged;
1358 BOOL removed_privilege = FALSE;
1359 BOOL usage_wanted = FALSE;
1360 BOOL verify_address_mode = FALSE;
1361 BOOL verify_as_sender = FALSE;
1362 BOOL version_printed = FALSE;
1363 uschar *alias_arg = NULL;
1364 uschar *called_as = US"";
1365 uschar *start_queue_run_id = NULL;
1366 uschar *stop_queue_run_id = NULL;
1367 uschar *expansion_test_message = NULL;
1368 uschar *ftest_domain = NULL;
1369 uschar *ftest_localpart = NULL;
1370 uschar *ftest_prefix = NULL;
1371 uschar *ftest_suffix = NULL;
1372 uschar *malware_test_file = NULL;
1373 uschar *real_sender_address;
1374 uschar *originator_home = US"/";
1375 void *reset_point;
1376
1377 struct passwd *pw;
1378 struct stat statbuf;
1379 pid_t passed_qr_pid = (pid_t)0;
1380 int passed_qr_pipe = -1;
1381 gid_t group_list[NGROUPS_MAX];
1382
1383 /* Possible options for -R and -S */
1384
1385 static uschar *rsopts[] = { US"f", US"ff", US"r", US"rf", US"rff" };
1386
1387 /* Need to define this in case we need to change the environment in order
1388 to get rid of a bogus time zone. We have to make it char rather than uschar
1389 because some OS define it in /usr/include/unistd.h. */
1390
1391 extern char **environ;
1392
1393 /* If the Exim user and/or group and/or the configuration file owner/group were
1394 defined by ref:name at build time, we must now find the actual uid/gid values.
1395 This is a feature to make the lives of binary distributors easier. */
1396
1397 #ifdef EXIM_USERNAME
1398 if (route_finduser(US EXIM_USERNAME, &pw, &exim_uid))
1399 {
1400 if (exim_uid == 0)
1401 {
1402 fprintf(stderr, "exim: refusing to run with uid 0 for \"%s\"\n",
1403 EXIM_USERNAME);
1404 exit(EXIT_FAILURE);
1405 }
1406 exim_gid = pw->pw_gid;
1407 }
1408 else
1409 {
1410 fprintf(stderr, "exim: failed to find uid for user name \"%s\"\n",
1411 EXIM_USERNAME);
1412 exit(EXIT_FAILURE);
1413 }
1414 #endif
1415
1416 #ifdef EXIM_GROUPNAME
1417 if (!route_findgroup(US EXIM_GROUPNAME, &exim_gid))
1418 {
1419 fprintf(stderr, "exim: failed to find gid for group name \"%s\"\n",
1420 EXIM_GROUPNAME);
1421 exit(EXIT_FAILURE);
1422 }
1423 #endif
1424
1425 #ifdef CONFIGURE_OWNERNAME
1426 if (!route_finduser(US CONFIGURE_OWNERNAME, NULL, &config_uid))
1427 {
1428 fprintf(stderr, "exim: failed to find uid for user name \"%s\"\n",
1429 CONFIGURE_OWNERNAME);
1430 exit(EXIT_FAILURE);
1431 }
1432 #endif
1433
1434 /* We default the system_filter_user to be the Exim run-time user, as a
1435 sane non-root value. */
1436 system_filter_uid = exim_uid;
1437
1438 #ifdef CONFIGURE_GROUPNAME
1439 if (!route_findgroup(US CONFIGURE_GROUPNAME, &config_gid))
1440 {
1441 fprintf(stderr, "exim: failed to find gid for group name \"%s\"\n",
1442 CONFIGURE_GROUPNAME);
1443 exit(EXIT_FAILURE);
1444 }
1445 #endif
1446
1447 /* In the Cygwin environment, some initialization needs doing. It is fudged
1448 in by means of this macro. */
1449
1450 #ifdef OS_INIT
1451 OS_INIT
1452 #endif
1453
1454 /* Check a field which is patched when we are running Exim within its
1455 testing harness; do a fast initial check, and then the whole thing. */
1456
1457 running_in_test_harness =
1458 *running_status == '<' && Ustrcmp(running_status, "<<<testing>>>") == 0;
1459
1460 /* The C standard says that the equivalent of setlocale(LC_ALL, "C") is obeyed
1461 at the start of a program; however, it seems that some environments do not
1462 follow this. A "strange" locale can affect the formatting of timestamps, so we
1463 make quite sure. */
1464
1465 setlocale(LC_ALL, "C");
1466
1467 /* Set up the default handler for timing using alarm(). */
1468
1469 os_non_restarting_signal(SIGALRM, sigalrm_handler);
1470
1471 /* Ensure we have a buffer for constructing log entries. Use malloc directly,
1472 because store_malloc writes a log entry on failure. */
1473
1474 log_buffer = (uschar *)malloc(LOG_BUFFER_SIZE);
1475 if (log_buffer == NULL)
1476 {
1477 fprintf(stderr, "exim: failed to get store for log buffer\n");
1478 exit(EXIT_FAILURE);
1479 }
1480
1481 /* Set log_stderr to stderr, provided that stderr exists. This gets reset to
1482 NULL when the daemon is run and the file is closed. We have to use this
1483 indirection, because some systems don't allow writing to the variable "stderr".
1484 */
1485
1486 if (fstat(fileno(stderr), &statbuf) >= 0) log_stderr = stderr;
1487
1488 /* Arrange for the PCRE regex library to use our store functions. Note that
1489 the normal calls are actually macros that add additional arguments for
1490 debugging purposes so we have to assign specially constructed functions here.
1491 The default is to use store in the stacking pool, but this is overridden in the
1492 regex_must_compile() function. */
1493
1494 pcre_malloc = function_store_get;
1495 pcre_free = function_dummy_free;
1496
1497 /* Ensure there is a big buffer for temporary use in several places. It is put
1498 in malloc store so that it can be freed for enlargement if necessary. */
1499
1500 big_buffer = store_malloc(big_buffer_size);
1501
1502 /* Set up the handler for the data request signal, and set the initial
1503 descriptive text. */
1504
1505 set_process_info("initializing");
1506 os_restarting_signal(SIGUSR1, usr1_handler);
1507
1508 /* SIGHUP is used to get the daemon to reconfigure. It gets set as appropriate
1509 in the daemon code. For the rest of Exim's uses, we ignore it. */
1510
1511 signal(SIGHUP, SIG_IGN);
1512
1513 /* We don't want to die on pipe errors as the code is written to handle
1514 the write error instead. */
1515
1516 signal(SIGPIPE, SIG_IGN);
1517
1518 /* Under some circumstance on some OS, Exim can get called with SIGCHLD
1519 set to SIG_IGN. This causes subprocesses that complete before the parent
1520 process waits for them not to hang around, so when Exim calls wait(), nothing
1521 is there. The wait() code has been made robust against this, but let's ensure
1522 that SIGCHLD is set to SIG_DFL, because it's tidier to wait and get a process
1523 ending status. We use sigaction rather than plain signal() on those OS where
1524 SA_NOCLDWAIT exists, because we want to be sure it is turned off. (There was a
1525 problem on AIX with this.) */
1526
1527 #ifdef SA_NOCLDWAIT
1528 {
1529 struct sigaction act;
1530 act.sa_handler = SIG_DFL;
1531 sigemptyset(&(act.sa_mask));
1532 act.sa_flags = 0;
1533 sigaction(SIGCHLD, &act, NULL);
1534 }
1535 #else
1536 signal(SIGCHLD, SIG_DFL);
1537 #endif
1538
1539 /* Save the arguments for use if we re-exec exim as a daemon after receiving
1540 SIGHUP. */
1541
1542 sighup_argv = argv;
1543
1544 /* Set up the version number. Set up the leading 'E' for the external form of
1545 message ids, set the pointer to the internal form, and initialize it to
1546 indicate no message being processed. */
1547
1548 version_init();
1549 message_id_option[0] = '-';
1550 message_id_external = message_id_option + 1;
1551 message_id_external[0] = 'E';
1552 message_id = message_id_external + 1;
1553 message_id[0] = 0;
1554
1555 /* Set the umask to zero so that any files Exim creates using open() are
1556 created with the modes that it specifies. NOTE: Files created with fopen() have
1557 a problem, which was not recognized till rather late (February 2006). With this
1558 umask, such files will be world writeable. (They are all content scanning files
1559 in the spool directory, which isn't world-accessible, so this is not a
1560 disaster, but it's untidy.) I don't want to change this overall setting,
1561 however, because it will interact badly with the open() calls. Instead, there's
1562 now a function called modefopen() that fiddles with the umask while calling
1563 fopen(). */
1564
1565 (void)umask(0);
1566
1567 /* Precompile the regular expression for matching a message id. Keep this in
1568 step with the code that generates ids in the accept.c module. We need to do
1569 this here, because the -M options check their arguments for syntactic validity
1570 using mac_ismsgid, which uses this. */
1571
1572 regex_ismsgid =
1573 regex_must_compile(US"^(?:[^\\W_]{6}-){2}[^\\W_]{2}$", FALSE, TRUE);
1574
1575 /* Precompile the regular expression that is used for matching an SMTP error
1576 code, possibly extended, at the start of an error message. Note that the
1577 terminating whitespace character is included. */
1578
1579 regex_smtp_code =
1580 regex_must_compile(US"^\\d\\d\\d\\s(?:\\d\\.\\d\\d?\\d?\\.\\d\\d?\\d?\\s)?",
1581 FALSE, TRUE);
1582
1583 #ifdef WHITELIST_D_MACROS
1584 /* Precompile the regular expression used to filter the content of macros
1585 given to -D for permissibility. */
1586
1587 regex_whitelisted_macro =
1588 regex_must_compile(US"^[A-Za-z0-9_/.-]*$", FALSE, TRUE);
1589 #endif
1590
1591
1592 /* If the program is called as "mailq" treat it as equivalent to "exim -bp";
1593 this seems to be a generally accepted convention, since one finds symbolic
1594 links called "mailq" in standard OS configurations. */
1595
1596 if ((namelen == 5 && Ustrcmp(argv[0], "mailq") == 0) ||
1597 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/mailq", 6) == 0))
1598 {
1599 list_queue = TRUE;
1600 receiving_message = FALSE;
1601 called_as = US"-mailq";
1602 }
1603
1604 /* If the program is called as "rmail" treat it as equivalent to
1605 "exim -i -oee", thus allowing UUCP messages to be input using non-SMTP mode,
1606 i.e. preventing a single dot on a line from terminating the message, and
1607 returning with zero return code, even in cases of error (provided an error
1608 message has been sent). */
1609
1610 if ((namelen == 5 && Ustrcmp(argv[0], "rmail") == 0) ||
1611 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/rmail", 6) == 0))
1612 {
1613 dot_ends = FALSE;
1614 called_as = US"-rmail";
1615 errors_sender_rc = EXIT_SUCCESS;
1616 }
1617
1618 /* If the program is called as "rsmtp" treat it as equivalent to "exim -bS";
1619 this is a smail convention. */
1620
1621 if ((namelen == 5 && Ustrcmp(argv[0], "rsmtp") == 0) ||
1622 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/rsmtp", 6) == 0))
1623 {
1624 smtp_input = smtp_batched_input = TRUE;
1625 called_as = US"-rsmtp";
1626 }
1627
1628 /* If the program is called as "runq" treat it as equivalent to "exim -q";
1629 this is a smail convention. */
1630
1631 if ((namelen == 4 && Ustrcmp(argv[0], "runq") == 0) ||
1632 (namelen > 4 && Ustrncmp(argv[0] + namelen - 5, "/runq", 5) == 0))
1633 {
1634 queue_interval = 0;
1635 receiving_message = FALSE;
1636 called_as = US"-runq";
1637 }
1638
1639 /* If the program is called as "newaliases" treat it as equivalent to
1640 "exim -bi"; this is a sendmail convention. */
1641
1642 if ((namelen == 10 && Ustrcmp(argv[0], "newaliases") == 0) ||
1643 (namelen > 10 && Ustrncmp(argv[0] + namelen - 11, "/newaliases", 11) == 0))
1644 {
1645 bi_option = TRUE;
1646 receiving_message = FALSE;
1647 called_as = US"-newaliases";
1648 }
1649
1650 /* Save the original effective uid for a couple of uses later. It should
1651 normally be root, but in some esoteric environments it may not be. */
1652
1653 original_euid = geteuid();
1654
1655 /* Get the real uid and gid. If the caller is root, force the effective uid/gid
1656 to be the same as the real ones. This makes a difference only if Exim is setuid
1657 (or setgid) to something other than root, which could be the case in some
1658 special configurations. */
1659
1660 real_uid = getuid();
1661 real_gid = getgid();
1662
1663 if (real_uid == root_uid)
1664 {
1665 rv = setgid(real_gid);
1666 if (rv)
1667 {
1668 fprintf(stderr, "exim: setgid(%ld) failed: %s\n",
1669 (long int)real_gid, strerror(errno));
1670 exit(EXIT_FAILURE);
1671 }
1672 rv = setuid(real_uid);
1673 if (rv)
1674 {
1675 fprintf(stderr, "exim: setuid(%ld) failed: %s\n",
1676 (long int)real_uid, strerror(errno));
1677 exit(EXIT_FAILURE);
1678 }
1679 }
1680
1681 /* If neither the original real uid nor the original euid was root, Exim is
1682 running in an unprivileged state. */
1683
1684 unprivileged = (real_uid != root_uid && original_euid != root_uid);
1685
1686 /* Scan the program's arguments. Some can be dealt with right away; others are
1687 simply recorded for checking and handling afterwards. Do a high-level switch
1688 on the second character (the one after '-'), to save some effort. */
1689
1690 for (i = 1; i < argc; i++)
1691 {
1692 BOOL badarg = FALSE;
1693 uschar *arg = argv[i];
1694 uschar *argrest;
1695 int switchchar;
1696
1697 /* An argument not starting with '-' is the start of a recipients list;
1698 break out of the options-scanning loop. */
1699
1700 if (arg[0] != '-')
1701 {
1702 recipients_arg = i;
1703 break;
1704 }
1705
1706 /* An option consistion of -- terminates the options */
1707
1708 if (Ustrcmp(arg, "--") == 0)
1709 {
1710 recipients_arg = i + 1;
1711 break;
1712 }
1713
1714 /* Handle flagged options */
1715
1716 switchchar = arg[1];
1717 argrest = arg+2;
1718
1719 /* Make all -ex options synonymous with -oex arguments, since that
1720 is assumed by various callers. Also make -qR options synonymous with -R
1721 options, as that seems to be required as well. Allow for -qqR too, and
1722 the same for -S options. */
1723
1724 if (Ustrncmp(arg+1, "oe", 2) == 0 ||
1725 Ustrncmp(arg+1, "qR", 2) == 0 ||
1726 Ustrncmp(arg+1, "qS", 2) == 0)
1727 {
1728 switchchar = arg[2];
1729 argrest++;
1730 }
1731 else if (Ustrncmp(arg+1, "qqR", 3) == 0 || Ustrncmp(arg+1, "qqS", 3) == 0)
1732 {
1733 switchchar = arg[3];
1734 argrest += 2;
1735 queue_2stage = TRUE;
1736 }
1737
1738 /* Make -r synonymous with -f, since it is a documented alias */
1739
1740 else if (arg[1] == 'r') switchchar = 'f';
1741
1742 /* Make -ov synonymous with -v */
1743
1744 else if (Ustrcmp(arg, "-ov") == 0)
1745 {
1746 switchchar = 'v';
1747 argrest++;
1748 }
1749
1750 /* deal with --option_aliases */
1751 else if (switchchar == '-')
1752 {
1753 if (Ustrcmp(argrest, "help") == 0)
1754 {
1755 usage_wanted = TRUE;
1756 break;
1757 }
1758 else if (Ustrcmp(argrest, "version") == 0)
1759 {
1760 switchchar = 'b';
1761 argrest = US"V";
1762 }
1763 }
1764
1765 /* High-level switch on active initial letter */
1766
1767 switch(switchchar)
1768 {
1769 /* -Btype is a sendmail option for 7bit/8bit setting. Exim is 8-bit clean
1770 so has no need of it. */
1771
1772 case 'B':
1773 if (*argrest == 0) i++; /* Skip over the type */
1774 break;
1775
1776
1777 case 'b':
1778 receiving_message = FALSE; /* Reset TRUE for -bm, -bS, -bs below */
1779
1780 /* -bd: Run in daemon mode, awaiting SMTP connections.
1781 -bdf: Ditto, but in the foreground.
1782 */
1783
1784 if (*argrest == 'd')
1785 {
1786 daemon_listen = TRUE;
1787 if (*(++argrest) == 'f') background_daemon = FALSE;
1788 else if (*argrest != 0) { badarg = TRUE; break; }
1789 }
1790
1791 /* -be: Run in expansion test mode
1792 -bem: Ditto, but read a message from a file first
1793 */
1794
1795 else if (*argrest == 'e')
1796 {
1797 expansion_test = checking = TRUE;
1798 if (argrest[1] == 'm')
1799 {
1800 if (++i >= argc) { badarg = TRUE; break; }
1801 expansion_test_message = argv[i];
1802 argrest++;
1803 }
1804 if (argrest[1] != 0) { badarg = TRUE; break; }
1805 }
1806
1807 /* -bF: Run system filter test */
1808
1809 else if (*argrest == 'F')
1810 {
1811 filter_test |= FTEST_SYSTEM;
1812 if (*(++argrest) != 0) { badarg = TRUE; break; }
1813 if (++i < argc) filter_test_sfile = argv[i]; else
1814 {
1815 fprintf(stderr, "exim: file name expected after %s\n", argv[i-1]);
1816 exit(EXIT_FAILURE);
1817 }
1818 }
1819
1820 /* -bf: Run user filter test
1821 -bfd: Set domain for filter testing
1822 -bfl: Set local part for filter testing
1823 -bfp: Set prefix for filter testing
1824 -bfs: Set suffix for filter testing
1825 */
1826
1827 else if (*argrest == 'f')
1828 {
1829 if (*(++argrest) == 0)
1830 {
1831 filter_test |= FTEST_USER;
1832 if (++i < argc) filter_test_ufile = argv[i]; else
1833 {
1834 fprintf(stderr, "exim: file name expected after %s\n", argv[i-1]);
1835 exit(EXIT_FAILURE);
1836 }
1837 }
1838 else
1839 {
1840 if (++i >= argc)
1841 {
1842 fprintf(stderr, "exim: string expected after %s\n", arg);
1843 exit(EXIT_FAILURE);
1844 }
1845 if (Ustrcmp(argrest, "d") == 0) ftest_domain = argv[i];
1846 else if (Ustrcmp(argrest, "l") == 0) ftest_localpart = argv[i];
1847 else if (Ustrcmp(argrest, "p") == 0) ftest_prefix = argv[i];
1848 else if (Ustrcmp(argrest, "s") == 0) ftest_suffix = argv[i];
1849 else { badarg = TRUE; break; }
1850 }
1851 }
1852
1853 /* -bh: Host checking - an IP address must follow. */
1854
1855 else if (Ustrcmp(argrest, "h") == 0 || Ustrcmp(argrest, "hc") == 0)
1856 {
1857 if (++i >= argc) { badarg = TRUE; break; }
1858 sender_host_address = argv[i];
1859 host_checking = checking = log_testing_mode = TRUE;
1860 host_checking_callout = argrest[1] == 'c';
1861 }
1862
1863 /* -bi: This option is used by sendmail to initialize *the* alias file,
1864 though it has the -oA option to specify a different file. Exim has no
1865 concept of *the* alias file, but since Sun's YP make script calls
1866 sendmail this way, some support must be provided. */
1867
1868 else if (Ustrcmp(argrest, "i") == 0) bi_option = TRUE;
1869
1870 /* -bm: Accept and deliver message - the default option. Reinstate
1871 receiving_message, which got turned off for all -b options. */
1872
1873 else if (Ustrcmp(argrest, "m") == 0) receiving_message = TRUE;
1874
1875 /* -bmalware: test the filename given for malware */
1876
1877 else if (Ustrcmp(argrest, "malware") == 0)
1878 {
1879 if (++i >= argc) { badarg = TRUE; break; }
1880 malware_test_file = argv[i];
1881 }
1882
1883 /* -bnq: For locally originating messages, do not qualify unqualified
1884 addresses. In the envelope, this causes errors; in header lines they
1885 just get left. */
1886
1887 else if (Ustrcmp(argrest, "nq") == 0)
1888 {
1889 allow_unqualified_sender = FALSE;
1890 allow_unqualified_recipient = FALSE;
1891 }
1892
1893 /* -bpxx: List the contents of the mail queue, in various forms. If
1894 the option is -bpc, just a queue count is needed. Otherwise, if the
1895 first letter after p is r, then order is random. */
1896
1897 else if (*argrest == 'p')
1898 {
1899 if (*(++argrest) == 'c')
1900 {
1901 count_queue = TRUE;
1902 if (*(++argrest) != 0) badarg = TRUE;
1903 break;
1904 }
1905
1906 if (*argrest == 'r')
1907 {
1908 list_queue_option = 8;
1909 argrest++;
1910 }
1911 else list_queue_option = 0;
1912
1913 list_queue = TRUE;
1914
1915 /* -bp: List the contents of the mail queue, top-level only */
1916
1917 if (*argrest == 0) {}
1918
1919 /* -bpu: List the contents of the mail queue, top-level undelivered */
1920
1921 else if (Ustrcmp(argrest, "u") == 0) list_queue_option += 1;
1922
1923 /* -bpa: List the contents of the mail queue, including all delivered */
1924
1925 else if (Ustrcmp(argrest, "a") == 0) list_queue_option += 2;
1926
1927 /* Unknown after -bp[r] */
1928
1929 else
1930 {
1931 badarg = TRUE;
1932 break;
1933 }
1934 }
1935
1936
1937 /* -bP: List the configuration variables given as the address list.
1938 Force -v, so configuration errors get displayed. */
1939
1940 else if (Ustrcmp(argrest, "P") == 0)
1941 {
1942 list_options = TRUE;
1943 debug_selector |= D_v;
1944 debug_file = stderr;
1945 }
1946
1947 /* -brt: Test retry configuration lookup */
1948
1949 else if (Ustrcmp(argrest, "rt") == 0)
1950 {
1951 test_retry_arg = i + 1;
1952 goto END_ARG;
1953 }
1954
1955 /* -brw: Test rewrite configuration */
1956
1957 else if (Ustrcmp(argrest, "rw") == 0)
1958 {
1959 test_rewrite_arg = i + 1;
1960 goto END_ARG;
1961 }
1962
1963 /* -bS: Read SMTP commands on standard input, but produce no replies -
1964 all errors are reported by sending messages. */
1965
1966 else if (Ustrcmp(argrest, "S") == 0)
1967 smtp_input = smtp_batched_input = receiving_message = TRUE;
1968
1969 /* -bs: Read SMTP commands on standard input and produce SMTP replies
1970 on standard output. */
1971
1972 else if (Ustrcmp(argrest, "s") == 0) smtp_input = receiving_message = TRUE;
1973
1974 /* -bt: address testing mode */
1975
1976 else if (Ustrcmp(argrest, "t") == 0)
1977 address_test_mode = checking = log_testing_mode = TRUE;
1978
1979 /* -bv: verify addresses */
1980
1981 else if (Ustrcmp(argrest, "v") == 0)
1982 verify_address_mode = checking = log_testing_mode = TRUE;
1983
1984 /* -bvs: verify sender addresses */
1985
1986 else if (Ustrcmp(argrest, "vs") == 0)
1987 {
1988 verify_address_mode = checking = log_testing_mode = TRUE;
1989 verify_as_sender = TRUE;
1990 }
1991
1992 /* -bV: Print version string and support details */
1993
1994 else if (Ustrcmp(argrest, "V") == 0)
1995 {
1996 printf("Exim version %s #%s built %s\n", version_string,
1997 version_cnumber, version_date);
1998 printf("%s\n", CS version_copyright);
1999 version_printed = TRUE;
2000 show_whats_supported(stdout);
2001 }
2002
2003 else badarg = TRUE;
2004 break;
2005
2006
2007 /* -C: change configuration file list; ignore if it isn't really
2008 a change! Enforce a prefix check if required. */
2009
2010 case 'C':
2011 if (*argrest == 0)
2012 {
2013 if(++i < argc) argrest = argv[i]; else
2014 { badarg = TRUE; break; }
2015 }
2016 if (Ustrcmp(config_main_filelist, argrest) != 0)
2017 {
2018 #ifdef ALT_CONFIG_PREFIX
2019 int sep = 0;
2020 int len = Ustrlen(ALT_CONFIG_PREFIX);
2021 uschar *list = argrest;
2022 uschar *filename;
2023 while((filename = string_nextinlist(&list, &sep, big_buffer,
2024 big_buffer_size)) != NULL)
2025 {
2026 if ((Ustrlen(filename) < len ||
2027 Ustrncmp(filename, ALT_CONFIG_PREFIX, len) != 0 ||
2028 Ustrstr(filename, "/../") != NULL) &&
2029 (Ustrcmp(filename, "/dev/null") != 0 || real_uid != root_uid))
2030 {
2031 fprintf(stderr, "-C Permission denied\n");
2032 exit(EXIT_FAILURE);
2033 }
2034 }
2035 #endif
2036 if (real_uid != root_uid)
2037 {
2038 #ifdef TRUSTED_CONFIG_LIST
2039
2040 if (real_uid != exim_uid
2041 #ifdef CONFIGURE_OWNER
2042 && real_uid != config_uid
2043 #endif
2044 )
2045 trusted_config = FALSE;
2046 else
2047 {
2048 FILE *trust_list = Ufopen(TRUSTED_CONFIG_LIST, "rb");
2049 if (trust_list)
2050 {
2051 struct stat statbuf;
2052
2053 if (fstat(fileno(trust_list), &statbuf) != 0 ||
2054 (statbuf.st_uid != root_uid /* owner not root */
2055 #ifdef CONFIGURE_OWNER
2056 && statbuf.st_uid != config_uid /* owner not the special one */
2057 #endif
2058 ) || /* or */
2059 (statbuf.st_gid != root_gid /* group not root */
2060 #ifdef CONFIGURE_GROUP
2061 && statbuf.st_gid != config_gid /* group not the special one */
2062 #endif
2063 && (statbuf.st_mode & 020) != 0 /* group writeable */
2064 ) || /* or */
2065 (statbuf.st_mode & 2) != 0) /* world writeable */
2066 {
2067 trusted_config = FALSE;
2068 fclose(trust_list);
2069 }
2070 else
2071 {
2072 /* Well, the trust list at least is up to scratch... */
2073 void *reset_point = store_get(0);
2074 uschar *trusted_configs[32];
2075 int nr_configs = 0;
2076 int i = 0;
2077
2078 while (Ufgets(big_buffer, big_buffer_size, trust_list))
2079 {
2080 uschar *start = big_buffer, *nl;
2081 while (*start && isspace(*start))
2082 start++;
2083 if (*start != '/')
2084 continue;
2085 nl = Ustrchr(start, '\n');
2086 if (nl)
2087 *nl = 0;
2088 trusted_configs[nr_configs++] = string_copy(start);
2089 if (nr_configs == 32)
2090 break;
2091 }
2092 fclose(trust_list);
2093
2094 if (nr_configs)
2095 {
2096 int sep = 0;
2097 uschar *list = argrest;
2098 uschar *filename;
2099 while (trusted_config && (filename = string_nextinlist(&list,
2100 &sep, big_buffer, big_buffer_size)) != NULL)
2101 {
2102 for (i=0; i < nr_configs; i++)
2103 {
2104 if (Ustrcmp(filename, trusted_configs[i]) == 0)
2105 break;
2106 }
2107 if (i == nr_configs)
2108 {
2109 trusted_config = FALSE;
2110 break;
2111 }
2112 }
2113 store_reset(reset_point);
2114 }
2115 else
2116 {
2117 /* No valid prefixes found in trust_list file. */
2118 trusted_config = FALSE;
2119 }
2120 }
2121 }
2122 else
2123 {
2124 /* Could not open trust_list file. */
2125 trusted_config = FALSE;
2126 }
2127 }
2128 #else
2129 /* Not root; don't trust config */
2130 trusted_config = FALSE;
2131 #endif
2132 }
2133
2134 config_main_filelist = argrest;
2135 config_changed = TRUE;
2136 }
2137 break;
2138
2139
2140 /* -D: set up a macro definition */
2141
2142 case 'D':
2143 #ifdef DISABLE_D_OPTION
2144 fprintf(stderr, "exim: -D is not available in this Exim binary\n");
2145 exit(EXIT_FAILURE);
2146 #else
2147 {
2148 int ptr = 0;
2149 macro_item *mlast = NULL;
2150 macro_item *m;
2151 uschar name[24];
2152 uschar *s = argrest;
2153
2154 while (isspace(*s)) s++;
2155
2156 if (*s < 'A' || *s > 'Z')
2157 {
2158 fprintf(stderr, "exim: macro name set by -D must start with "
2159 "an upper case letter\n");
2160 exit(EXIT_FAILURE);
2161 }
2162
2163 while (isalnum(*s) || *s == '_')
2164 {
2165 if (ptr < sizeof(name)-1) name[ptr++] = *s;
2166 s++;
2167 }
2168 name[ptr] = 0;
2169 if (ptr == 0) { badarg = TRUE; break; }
2170 while (isspace(*s)) s++;
2171 if (*s != 0)
2172 {
2173 if (*s++ != '=') { badarg = TRUE; break; }
2174 while (isspace(*s)) s++;
2175 }
2176
2177 for (m = macros; m != NULL; m = m->next)
2178 {
2179 if (Ustrcmp(m->name, name) == 0)
2180 {
2181 fprintf(stderr, "exim: duplicated -D in command line\n");
2182 exit(EXIT_FAILURE);
2183 }
2184 mlast = m;
2185 }
2186
2187 m = store_get(sizeof(macro_item) + Ustrlen(name));
2188 m->next = NULL;
2189 m->command_line = TRUE;
2190 if (mlast == NULL) macros = m; else mlast->next = m;
2191 Ustrcpy(m->name, name);
2192 m->replacement = string_copy(s);
2193
2194 if (clmacro_count >= MAX_CLMACROS)
2195 {
2196 fprintf(stderr, "exim: too many -D options on command line\n");
2197 exit(EXIT_FAILURE);
2198 }
2199 clmacros[clmacro_count++] = string_sprintf("-D%s=%s", m->name,
2200 m->replacement);
2201 }
2202 #endif
2203 break;
2204
2205 /* -d: Set debug level (see also -v below) or set the drop_cr option.
2206 The latter is now a no-op, retained for compatibility only. If -dd is used,
2207 debugging subprocesses of the daemon is disabled. */
2208
2209 case 'd':
2210 if (Ustrcmp(argrest, "ropcr") == 0)
2211 {
2212 /* drop_cr = TRUE; */
2213 }
2214
2215 /* Use an intermediate variable so that we don't set debugging while
2216 decoding the debugging bits. */
2217
2218 else
2219 {
2220 unsigned int selector = D_default;
2221 debug_selector = 0;
2222 debug_file = NULL;
2223 if (*argrest == 'd')
2224 {
2225 debug_daemon = TRUE;
2226 argrest++;
2227 }
2228 if (*argrest != 0)
2229 decode_bits(&selector, NULL, D_memory, 0, argrest, debug_options,
2230 debug_options_count, US"debug", 0);
2231 debug_selector = selector;
2232 }
2233 break;
2234
2235
2236 /* -E: This is a local error message. This option is not intended for
2237 external use at all, but is not restricted to trusted callers because it
2238 does no harm (just suppresses certain error messages) and if Exim is run
2239 not setuid root it won't always be trusted when it generates error
2240 messages using this option. If there is a message id following -E, point
2241 message_reference at it, for logging. */
2242
2243 case 'E':
2244 local_error_message = TRUE;
2245 if (mac_ismsgid(argrest)) message_reference = argrest;
2246 break;
2247
2248
2249 /* -ex: The vacation program calls sendmail with the undocumented "-eq"
2250 option, so it looks as if historically the -oex options are also callable
2251 without the leading -o. So we have to accept them. Before the switch,
2252 anything starting -oe has been converted to -e. Exim does not support all
2253 of the sendmail error options. */
2254
2255 case 'e':
2256 if (Ustrcmp(argrest, "e") == 0)
2257 {
2258 arg_error_handling = ERRORS_SENDER;
2259 errors_sender_rc = EXIT_SUCCESS;
2260 }
2261 else if (Ustrcmp(argrest, "m") == 0) arg_error_handling = ERRORS_SENDER;
2262 else if (Ustrcmp(argrest, "p") == 0) arg_error_handling = ERRORS_STDERR;
2263 else if (Ustrcmp(argrest, "q") == 0) arg_error_handling = ERRORS_STDERR;
2264 else if (Ustrcmp(argrest, "w") == 0) arg_error_handling = ERRORS_SENDER;
2265 else badarg = TRUE;
2266 break;
2267
2268
2269 /* -F: Set sender's full name, used instead of the gecos entry from
2270 the password file. Since users can usually alter their gecos entries,
2271 there's no security involved in using this instead. The data can follow
2272 the -F or be in the next argument. */
2273
2274 case 'F':
2275 if (*argrest == 0)
2276 {
2277 if(++i < argc) argrest = argv[i]; else
2278 { badarg = TRUE; break; }
2279 }
2280 originator_name = argrest;
2281 sender_name_forced = TRUE;
2282 break;
2283
2284
2285 /* -f: Set sender's address - this value is only actually used if Exim is
2286 run by a trusted user, or if untrusted_set_sender is set and matches the
2287 address, except that the null address can always be set by any user. The
2288 test for this happens later, when the value given here is ignored when not
2289 permitted. For an untrusted user, the actual sender is still put in Sender:
2290 if it doesn't match the From: header (unless no_local_from_check is set).
2291 The data can follow the -f or be in the next argument. The -r switch is an
2292 obsolete form of -f but since there appear to be programs out there that
2293 use anything that sendmail has ever supported, better accept it - the
2294 synonymizing is done before the switch above.
2295
2296 At this stage, we must allow domain literal addresses, because we don't
2297 know what the setting of allow_domain_literals is yet. Ditto for trailing
2298 dots and strip_trailing_dot. */
2299
2300 case 'f':
2301 {
2302 int start, end;
2303 uschar *errmess;
2304 if (*argrest == 0)
2305 {
2306 if (i+1 < argc) argrest = argv[++i]; else
2307 { badarg = TRUE; break; }
2308 }
2309 if (*argrest == 0)
2310 {
2311 sender_address = string_sprintf(""); /* Ensure writeable memory */
2312 }
2313 else
2314 {
2315 uschar *temp = argrest + Ustrlen(argrest) - 1;
2316 while (temp >= argrest && isspace(*temp)) temp--;
2317 if (temp >= argrest && *temp == '.') f_end_dot = TRUE;
2318 allow_domain_literals = TRUE;
2319 strip_trailing_dot = TRUE;
2320 sender_address = parse_extract_address(argrest, &errmess, &start, &end,
2321 &sender_address_domain, TRUE);
2322 allow_domain_literals = FALSE;
2323 strip_trailing_dot = FALSE;
2324 if (sender_address == NULL)
2325 {
2326 fprintf(stderr, "exim: bad -f address \"%s\": %s\n", argrest, errmess);
2327 return EXIT_FAILURE;
2328 }
2329 }
2330 sender_address_forced = TRUE;
2331 }
2332 break;
2333
2334 /* This is some Sendmail thing which can be ignored */
2335
2336 case 'G':
2337 break;
2338
2339 /* -h: Set the hop count for an incoming message. Exim does not currently
2340 support this; it always computes it by counting the Received: headers.
2341 To put it in will require a change to the spool header file format. */
2342
2343 case 'h':
2344 if (*argrest == 0)
2345 {
2346 if(++i < argc) argrest = argv[i]; else
2347 { badarg = TRUE; break; }
2348 }
2349 if (!isdigit(*argrest)) badarg = TRUE;
2350 break;
2351
2352
2353 /* -i: Set flag so dot doesn't end non-SMTP input (same as -oi, seems
2354 not to be documented for sendmail but mailx (at least) uses it) */
2355
2356 case 'i':
2357 if (*argrest == 0) dot_ends = FALSE; else badarg = TRUE;
2358 break;
2359
2360
2361 case 'M':
2362 receiving_message = FALSE;
2363
2364 /* -MC: continue delivery of another message via an existing open
2365 file descriptor. This option is used for an internal call by the
2366 smtp transport when there is a pending message waiting to go to an
2367 address to which it has got a connection. Five subsequent arguments are
2368 required: transport name, host name, IP address, sequence number, and
2369 message_id. Transports may decline to create new processes if the sequence
2370 number gets too big. The channel is stdin. This (-MC) must be the last
2371 argument. There's a subsequent check that the real-uid is privileged.
2372
2373 If we are running in the test harness. delay for a bit, to let the process
2374 that set this one up complete. This makes for repeatability of the logging,
2375 etc. output. */
2376
2377 if (Ustrcmp(argrest, "C") == 0)
2378 {
2379 union sockaddr_46 interface_sock;
2380 EXIM_SOCKLEN_T size = sizeof(interface_sock);
2381
2382 if (argc != i + 6)
2383 {
2384 fprintf(stderr, "exim: too many or too few arguments after -MC\n");
2385 return EXIT_FAILURE;
2386 }
2387
2388 if (msg_action_arg >= 0)
2389 {
2390 fprintf(stderr, "exim: incompatible arguments\n");
2391 return EXIT_FAILURE;
2392 }
2393
2394 continue_transport = argv[++i];
2395 continue_hostname = argv[++i];
2396 continue_host_address = argv[++i];
2397 continue_sequence = Uatoi(argv[++i]);
2398 msg_action = MSG_DELIVER;
2399 msg_action_arg = ++i;
2400 forced_delivery = TRUE;
2401 queue_run_pid = passed_qr_pid;
2402 queue_run_pipe = passed_qr_pipe;
2403
2404 if (!mac_ismsgid(argv[i]))
2405 {
2406 fprintf(stderr, "exim: malformed message id %s after -MC option\n",
2407 argv[i]);
2408 return EXIT_FAILURE;
2409 }
2410
2411 /* Set up $sending_ip_address and $sending_port */
2412
2413 if (getsockname(fileno(stdin), (struct sockaddr *)(&interface_sock),
2414 &size) == 0)
2415 sending_ip_address = host_ntoa(-1, &interface_sock, NULL,
2416 &sending_port);
2417 else
2418 {
2419 fprintf(stderr, "exim: getsockname() failed after -MC option: %s\n",
2420 strerror(errno));
2421 return EXIT_FAILURE;
2422 }
2423
2424 if (running_in_test_harness) millisleep(500);
2425 break;
2426 }
2427
2428 /* -MCA: set the smtp_authenticated flag; this is useful only when it
2429 precedes -MC (see above). The flag indicates that the host to which
2430 Exim is connected has accepted an AUTH sequence. */
2431
2432 else if (Ustrcmp(argrest, "CA") == 0)
2433 {
2434 smtp_authenticated = TRUE;
2435 break;
2436 }
2437
2438 /* -MCP: set the smtp_use_pipelining flag; this is useful only when
2439 it preceded -MC (see above) */
2440
2441 else if (Ustrcmp(argrest, "CP") == 0)
2442 {
2443 smtp_use_pipelining = TRUE;
2444 break;
2445 }
2446
2447 /* -MCQ: pass on the pid of the queue-running process that started
2448 this chain of deliveries and the fd of its synchronizing pipe; this
2449 is useful only when it precedes -MC (see above) */
2450
2451 else if (Ustrcmp(argrest, "CQ") == 0)
2452 {
2453 if(++i < argc) passed_qr_pid = (pid_t)(Uatol(argv[i]));
2454 else badarg = TRUE;
2455 if(++i < argc) passed_qr_pipe = (int)(Uatol(argv[i]));
2456 else badarg = TRUE;
2457 break;
2458 }
2459
2460 /* -MCS: set the smtp_use_size flag; this is useful only when it
2461 precedes -MC (see above) */
2462
2463 else if (Ustrcmp(argrest, "CS") == 0)
2464 {
2465 smtp_use_size = TRUE;
2466 break;
2467 }
2468
2469 /* -MCT: set the tls_offered flag; this is useful only when it
2470 precedes -MC (see above). The flag indicates that the host to which
2471 Exim is connected has offered TLS support. */
2472
2473 #ifdef SUPPORT_TLS
2474 else if (Ustrcmp(argrest, "CT") == 0)
2475 {
2476 tls_offered = TRUE;
2477 break;
2478 }
2479 #endif
2480
2481 /* -M[x]: various operations on the following list of message ids:
2482 -M deliver the messages, ignoring next retry times and thawing
2483 -Mc deliver the messages, checking next retry times, no thawing
2484 -Mf freeze the messages
2485 -Mg give up on the messages
2486 -Mt thaw the messages
2487 -Mrm remove the messages
2488 In the above cases, this must be the last option. There are also the
2489 following options which are followed by a single message id, and which
2490 act on that message. Some of them use the "recipient" addresses as well.
2491 -Mar add recipient(s)
2492 -Mmad mark all recipients delivered
2493 -Mmd mark recipients(s) delivered
2494 -Mes edit sender
2495 -Mset load a message for use with -be
2496 -Mvb show body
2497 -Mvc show copy (of whole message, in RFC 2822 format)
2498 -Mvh show header
2499 -Mvl show log
2500 */
2501
2502 else if (*argrest == 0)
2503 {
2504 msg_action = MSG_DELIVER;
2505 forced_delivery = deliver_force_thaw = TRUE;
2506 }
2507 else if (Ustrcmp(argrest, "ar") == 0)
2508 {
2509 msg_action = MSG_ADD_RECIPIENT;
2510 one_msg_action = TRUE;
2511 }
2512 else if (Ustrcmp(argrest, "c") == 0) msg_action = MSG_DELIVER;
2513 else if (Ustrcmp(argrest, "es") == 0)
2514 {
2515 msg_action = MSG_EDIT_SENDER;
2516 one_msg_action = TRUE;
2517 }
2518 else if (Ustrcmp(argrest, "f") == 0) msg_action = MSG_FREEZE;
2519 else if (Ustrcmp(argrest, "g") == 0)
2520 {
2521 msg_action = MSG_DELIVER;
2522 deliver_give_up = TRUE;
2523 }
2524 else if (Ustrcmp(argrest, "mad") == 0)
2525 {
2526 msg_action = MSG_MARK_ALL_DELIVERED;
2527 }
2528 else if (Ustrcmp(argrest, "md") == 0)
2529 {
2530 msg_action = MSG_MARK_DELIVERED;
2531 one_msg_action = TRUE;
2532 }
2533 else if (Ustrcmp(argrest, "rm") == 0) msg_action = MSG_REMOVE;
2534 else if (Ustrcmp(argrest, "set") == 0)
2535 {
2536 msg_action = MSG_LOAD;
2537 one_msg_action = TRUE;
2538 }
2539 else if (Ustrcmp(argrest, "t") == 0) msg_action = MSG_THAW;
2540 else if (Ustrcmp(argrest, "vb") == 0)
2541 {
2542 msg_action = MSG_SHOW_BODY;
2543 one_msg_action = TRUE;
2544 }
2545 else if (Ustrcmp(argrest, "vc") == 0)
2546 {
2547 msg_action = MSG_SHOW_COPY;
2548 one_msg_action = TRUE;
2549 }
2550 else if (Ustrcmp(argrest, "vh") == 0)
2551 {
2552 msg_action = MSG_SHOW_HEADER;
2553 one_msg_action = TRUE;
2554 }
2555 else if (Ustrcmp(argrest, "vl") == 0)
2556 {
2557 msg_action = MSG_SHOW_LOG;
2558 one_msg_action = TRUE;
2559 }
2560 else { badarg = TRUE; break; }
2561
2562 /* All the -Mxx options require at least one message id. */
2563
2564 msg_action_arg = i + 1;
2565 if (msg_action_arg >= argc)
2566 {
2567 fprintf(stderr, "exim: no message ids given after %s option\n", arg);
2568 return EXIT_FAILURE;
2569 }
2570
2571 /* Some require only message ids to follow */
2572
2573 if (!one_msg_action)
2574 {
2575 int j;
2576 for (j = msg_action_arg; j < argc; j++) if (!mac_ismsgid(argv[j]))
2577 {
2578 fprintf(stderr, "exim: malformed message id %s after %s option\n",
2579 argv[j], arg);
2580 return EXIT_FAILURE;
2581 }
2582 goto END_ARG; /* Remaining args are ids */
2583 }
2584
2585 /* Others require only one message id, possibly followed by addresses,
2586 which will be handled as normal arguments. */
2587
2588 else
2589 {
2590 if (!mac_ismsgid(argv[msg_action_arg]))
2591 {
2592 fprintf(stderr, "exim: malformed message id %s after %s option\n",
2593 argv[msg_action_arg], arg);
2594 return EXIT_FAILURE;
2595 }
2596 i++;
2597 }
2598 break;
2599
2600
2601 /* Some programs seem to call the -om option without the leading o;
2602 for sendmail it askes for "me too". Exim always does this. */
2603
2604 case 'm':
2605 if (*argrest != 0) badarg = TRUE;
2606 break;
2607
2608
2609 /* -N: don't do delivery - a debugging option that stops transports doing
2610 their thing. It implies debugging at the D_v level. */
2611
2612 case 'N':
2613 if (*argrest == 0)
2614 {
2615 dont_deliver = TRUE;
2616 debug_selector |= D_v;
2617 debug_file = stderr;
2618 }
2619 else badarg = TRUE;
2620 break;
2621
2622
2623 /* -n: This means "don't alias" in sendmail, apparently. Just ignore
2624 it. */
2625
2626 case 'n':
2627 break;
2628
2629 /* -O: Just ignore it. In sendmail, apparently -O option=value means set
2630 option to the specified value. This form uses long names. We need to handle
2631 -O option=value and -Ooption=value. */
2632
2633 case 'O':
2634 if (*argrest == 0)
2635 {
2636 if (++i >= argc)
2637 {
2638 fprintf(stderr, "exim: string expected after -O\n");
2639 exit(EXIT_FAILURE);
2640 }
2641 }
2642 break;
2643
2644 case 'o':
2645
2646 /* -oA: Set an argument for the bi command (sendmail's "alternate alias
2647 file" option). */
2648
2649 if (*argrest == 'A')
2650 {
2651 alias_arg = argrest + 1;
2652 if (alias_arg[0] == 0)
2653 {
2654 if (i+1 < argc) alias_arg = argv[++i]; else
2655 {
2656 fprintf(stderr, "exim: string expected after -oA\n");
2657 exit(EXIT_FAILURE);
2658 }
2659 }
2660 }
2661
2662 /* -oB: Set a connection message max value for remote deliveries */
2663
2664 else if (*argrest == 'B')
2665 {
2666 uschar *p = argrest + 1;
2667 if (p[0] == 0)
2668 {
2669 if (i+1 < argc && isdigit((argv[i+1][0]))) p = argv[++i]; else
2670 {
2671 connection_max_messages = 1;
2672 p = NULL;
2673 }
2674 }
2675
2676 if (p != NULL)
2677 {
2678 if (!isdigit(*p))
2679 {
2680 fprintf(stderr, "exim: number expected after -oB\n");
2681 exit(EXIT_FAILURE);
2682 }
2683 connection_max_messages = Uatoi(p);
2684 }
2685 }
2686
2687 /* -odb: background delivery */
2688
2689 else if (Ustrcmp(argrest, "db") == 0)
2690 {
2691 synchronous_delivery = FALSE;
2692 arg_queue_only = FALSE;
2693 queue_only_set = TRUE;
2694 }
2695
2696 /* -odf: foreground delivery (smail-compatible option); same effect as
2697 -odi: interactive (synchronous) delivery (sendmail-compatible option)
2698 */
2699
2700 else if (Ustrcmp(argrest, "df") == 0 || Ustrcmp(argrest, "di") == 0)
2701 {
2702 synchronous_delivery = TRUE;
2703 arg_queue_only = FALSE;
2704 queue_only_set = TRUE;
2705 }
2706
2707 /* -odq: queue only */
2708
2709 else if (Ustrcmp(argrest, "dq") == 0)
2710 {
2711 synchronous_delivery = FALSE;
2712 arg_queue_only = TRUE;
2713 queue_only_set = TRUE;
2714 }
2715
2716 /* -odqs: queue SMTP only - do local deliveries and remote routing,
2717 but no remote delivery */
2718
2719 else if (Ustrcmp(argrest, "dqs") == 0)
2720 {
2721 queue_smtp = TRUE;
2722 arg_queue_only = FALSE;
2723 queue_only_set = TRUE;
2724 }
2725
2726 /* -oex: Sendmail error flags. As these are also accepted without the
2727 leading -o prefix, for compatibility with vacation and other callers,
2728 they are handled with -e above. */
2729
2730 /* -oi: Set flag so dot doesn't end non-SMTP input (same as -i)
2731 -oitrue: Another sendmail syntax for the same */
2732
2733 else if (Ustrcmp(argrest, "i") == 0 ||
2734 Ustrcmp(argrest, "itrue") == 0)
2735 dot_ends = FALSE;
2736
2737 /* -oM*: Set various characteristics for an incoming message; actually
2738 acted on for trusted callers only. */
2739
2740 else if (*argrest == 'M')
2741 {
2742 if (i+1 >= argc)
2743 {
2744 fprintf(stderr, "exim: data expected after -o%s\n", argrest);
2745 exit(EXIT_FAILURE);
2746 }
2747
2748 /* -oMa: Set sender host address */
2749
2750 if (Ustrcmp(argrest, "Ma") == 0) sender_host_address = argv[++i];
2751
2752 /* -oMaa: Set authenticator name */
2753
2754 else if (Ustrcmp(argrest, "Maa") == 0)
2755 sender_host_authenticated = argv[++i];
2756
2757 /* -oMas: setting authenticated sender */
2758
2759 else if (Ustrcmp(argrest, "Mas") == 0) authenticated_sender = argv[++i];
2760
2761 /* -oMai: setting authenticated id */
2762
2763 else if (Ustrcmp(argrest, "Mai") == 0) authenticated_id = argv[++i];
2764
2765 /* -oMi: Set incoming interface address */
2766
2767 else if (Ustrcmp(argrest, "Mi") == 0) interface_address = argv[++i];
2768
2769 /* -oMr: Received protocol */
2770
2771 else if (Ustrcmp(argrest, "Mr") == 0) received_protocol = argv[++i];
2772
2773 /* -oMs: Set sender host name */
2774
2775 else if (Ustrcmp(argrest, "Ms") == 0) sender_host_name = argv[++i];
2776
2777 /* -oMt: Set sender ident */
2778
2779 else if (Ustrcmp(argrest, "Mt") == 0)
2780 {
2781 sender_ident_set = TRUE;
2782 sender_ident = argv[++i];
2783 }
2784
2785 /* Else a bad argument */
2786
2787 else
2788 {
2789 badarg = TRUE;
2790 break;
2791 }
2792 }
2793
2794 /* -om: Me-too flag for aliases. Exim always does this. Some programs
2795 seem to call this as -m (undocumented), so that is also accepted (see
2796 above). */
2797
2798 else if (Ustrcmp(argrest, "m") == 0) {}
2799
2800 /* -oo: An ancient flag for old-style addresses which still seems to
2801 crop up in some calls (see in SCO). */
2802
2803 else if (Ustrcmp(argrest, "o") == 0) {}
2804
2805 /* -oP <name>: set pid file path for daemon */
2806
2807 else if (Ustrcmp(argrest, "P") == 0)
2808 override_pid_file_path = argv[++i];
2809
2810 /* -or <n>: set timeout for non-SMTP acceptance
2811 -os <n>: set timeout for SMTP acceptance */
2812
2813 else if (*argrest == 'r' || *argrest == 's')
2814 {
2815 int *tp = (*argrest == 'r')?
2816 &arg_receive_timeout : &arg_smtp_receive_timeout;
2817 if (argrest[1] == 0)
2818 {
2819 if (i+1 < argc) *tp= readconf_readtime(argv[++i], 0, FALSE);
2820 }
2821 else *tp = readconf_readtime(argrest + 1, 0, FALSE);
2822 if (*tp < 0)
2823 {
2824 fprintf(stderr, "exim: bad time value %s: abandoned\n", argv[i]);
2825 exit(EXIT_FAILURE);
2826 }
2827 }
2828
2829 /* -oX <list>: Override local_interfaces and/or default daemon ports */
2830
2831 else if (Ustrcmp(argrest, "X") == 0)
2832 override_local_interfaces = argv[++i];
2833
2834 /* Unknown -o argument */
2835
2836 else badarg = TRUE;
2837 break;
2838
2839
2840 /* -ps: force Perl startup; -pd force delayed Perl startup */
2841
2842 case 'p':
2843 #ifdef EXIM_PERL
2844 if (*argrest == 's' && argrest[1] == 0)
2845 {
2846 perl_start_option = 1;
2847 break;
2848 }
2849 if (*argrest == 'd' && argrest[1] == 0)
2850 {
2851 perl_start_option = -1;
2852 break;
2853 }
2854 #endif
2855
2856 /* -panythingelse is taken as the Sendmail-compatible argument -prval:sval,
2857 which sets the host protocol and host name */
2858
2859 if (*argrest == 0)
2860 {
2861 if (i+1 < argc) argrest = argv[++i]; else
2862 { badarg = TRUE; break; }
2863 }
2864
2865 if (*argrest != 0)
2866 {
2867 uschar *hn = Ustrchr(argrest, ':');
2868 if (hn == NULL)
2869 {
2870 received_protocol = argrest;
2871 }
2872 else
2873 {
2874 received_protocol = string_copyn(argrest, hn - argrest);
2875 sender_host_name = hn + 1;
2876 }
2877 }
2878 break;
2879
2880
2881 case 'q':
2882 receiving_message = FALSE;
2883 if (queue_interval >= 0)
2884 {
2885 fprintf(stderr, "exim: -q specified more than once\n");
2886 exit(EXIT_FAILURE);
2887 }
2888
2889 /* -qq...: Do queue runs in a 2-stage manner */
2890
2891 if (*argrest == 'q')
2892 {
2893 queue_2stage = TRUE;
2894 argrest++;
2895 }
2896
2897 /* -qi...: Do only first (initial) deliveries */
2898
2899 if (*argrest == 'i')
2900 {
2901 queue_run_first_delivery = TRUE;
2902 argrest++;
2903 }
2904
2905 /* -qf...: Run the queue, forcing deliveries
2906 -qff..: Ditto, forcing thawing as well */
2907
2908 if (*argrest == 'f')
2909 {
2910 queue_run_force = TRUE;
2911 if (*(++argrest) == 'f')
2912 {
2913 deliver_force_thaw = TRUE;
2914 argrest++;
2915 }
2916 }
2917
2918 /* -q[f][f]l...: Run the queue only on local deliveries */
2919
2920 if (*argrest == 'l')
2921 {
2922 queue_run_local = TRUE;
2923 argrest++;
2924 }
2925
2926 /* -q[f][f][l]: Run the queue, optionally forced, optionally local only,
2927 optionally starting from a given message id. */
2928
2929 if (*argrest == 0 &&
2930 (i + 1 >= argc || argv[i+1][0] == '-' || mac_ismsgid(argv[i+1])))
2931 {
2932 queue_interval = 0;
2933 if (i+1 < argc && mac_ismsgid(argv[i+1]))
2934 start_queue_run_id = argv[++i];
2935 if (i+1 < argc && mac_ismsgid(argv[i+1]))
2936 stop_queue_run_id = argv[++i];
2937 }
2938
2939 /* -q[f][f][l]<n>: Run the queue at regular intervals, optionally forced,
2940 optionally local only. */
2941
2942 else
2943 {
2944 if (*argrest != 0)
2945 queue_interval = readconf_readtime(argrest, 0, FALSE);
2946 else
2947 queue_interval = readconf_readtime(argv[++i], 0, FALSE);
2948 if (queue_interval <= 0)
2949 {
2950 fprintf(stderr, "exim: bad time value %s: abandoned\n", argv[i]);
2951 exit(EXIT_FAILURE);
2952 }
2953 }
2954 break;
2955
2956
2957 case 'R': /* Synonymous with -qR... */
2958 receiving_message = FALSE;
2959
2960 /* -Rf: As -R (below) but force all deliveries,
2961 -Rff: Ditto, but also thaw all frozen messages,
2962 -Rr: String is regex
2963 -Rrf: Regex and force
2964 -Rrff: Regex and force and thaw
2965
2966 in all cases provided there are no further characters in this
2967 argument. */
2968
2969 if (*argrest != 0)
2970 {
2971 int i;
2972 for (i = 0; i < sizeof(rsopts)/sizeof(uschar *); i++)
2973 {
2974 if (Ustrcmp(argrest, rsopts[i]) == 0)
2975 {
2976 if (i != 2) queue_run_force = TRUE;
2977 if (i >= 2) deliver_selectstring_regex = TRUE;
2978 if (i == 1 || i == 4) deliver_force_thaw = TRUE;
2979 argrest += Ustrlen(rsopts[i]);
2980 }
2981 }
2982 }
2983
2984 /* -R: Set string to match in addresses for forced queue run to
2985 pick out particular messages. */
2986
2987 if (*argrest == 0)
2988 {
2989 if (i+1 < argc) deliver_selectstring = argv[++i]; else
2990 {
2991 fprintf(stderr, "exim: string expected after -R\n");
2992 exit(EXIT_FAILURE);
2993 }
2994 }
2995 else deliver_selectstring = argrest;
2996 break;
2997
2998
2999 /* -r: an obsolete synonym for -f (see above) */
3000
3001
3002 /* -S: Like -R but works on sender. */
3003
3004 case 'S': /* Synonymous with -qS... */
3005 receiving_message = FALSE;
3006
3007 /* -Sf: As -S (below) but force all deliveries,
3008 -Sff: Ditto, but also thaw all frozen messages,
3009 -Sr: String is regex
3010 -Srf: Regex and force
3011 -Srff: Regex and force and thaw
3012
3013 in all cases provided there are no further characters in this
3014 argument. */
3015
3016 if (*argrest != 0)
3017 {
3018 int i;
3019 for (i = 0; i < sizeof(rsopts)/sizeof(uschar *); i++)
3020 {
3021 if (Ustrcmp(argrest, rsopts[i]) == 0)
3022 {
3023 if (i != 2) queue_run_force = TRUE;
3024 if (i >= 2) deliver_selectstring_sender_regex = TRUE;
3025 if (i == 1 || i == 4) deliver_force_thaw = TRUE;
3026 argrest += Ustrlen(rsopts[i]);
3027 }
3028 }
3029 }
3030
3031 /* -S: Set string to match in addresses for forced queue run to
3032 pick out particular messages. */
3033
3034 if (*argrest == 0)
3035 {
3036 if (i+1 < argc) deliver_selectstring_sender = argv[++i]; else
3037 {
3038 fprintf(stderr, "exim: string expected after -S\n");
3039 exit(EXIT_FAILURE);
3040 }
3041 }
3042 else deliver_selectstring_sender = argrest;
3043 break;
3044
3045 /* -Tqt is an option that is exclusively for use by the testing suite.
3046 It is not recognized in other circumstances. It allows for the setting up
3047 of explicit "queue times" so that various warning/retry things can be
3048 tested. Otherwise variability of clock ticks etc. cause problems. */
3049
3050 case 'T':
3051 if (running_in_test_harness && Ustrcmp(argrest, "qt") == 0)
3052 fudged_queue_times = argv[++i];
3053 else badarg = TRUE;
3054 break;
3055
3056
3057 /* -t: Set flag to extract recipients from body of message. */
3058
3059 case 't':
3060 if (*argrest == 0) extract_recipients = TRUE;
3061
3062 /* -ti: Set flag to extract recipients from body of message, and also
3063 specify that dot does not end the message. */
3064
3065 else if (Ustrcmp(argrest, "i") == 0)
3066 {
3067 extract_recipients = TRUE;
3068 dot_ends = FALSE;
3069 }
3070
3071 /* -tls-on-connect: don't wait for STARTTLS (for old clients) */
3072
3073 #ifdef SUPPORT_TLS
3074 else if (Ustrcmp(argrest, "ls-on-connect") == 0) tls_on_connect = TRUE;
3075 #endif
3076
3077 else badarg = TRUE;
3078 break;
3079
3080
3081 /* -U: This means "initial user submission" in sendmail, apparently. The
3082 doc claims that in future sendmail may refuse syntactically invalid
3083 messages instead of fixing them. For the moment, we just ignore it. */
3084
3085 case 'U':
3086 break;
3087
3088
3089 /* -v: verify things - this is a very low-level debugging */
3090
3091 case 'v':
3092 if (*argrest == 0)
3093 {
3094 debug_selector |= D_v;
3095 debug_file = stderr;
3096 }
3097 else badarg = TRUE;
3098 break;
3099
3100
3101 /* -x: AIX uses this to indicate some fancy 8-bit character stuff:
3102
3103 The -x flag tells the sendmail command that mail from a local
3104 mail program has National Language Support (NLS) extended characters
3105 in the body of the mail item. The sendmail command can send mail with
3106 extended NLS characters across networks that normally corrupts these
3107 8-bit characters.
3108
3109 As Exim is 8-bit clean, it just ignores this flag. */
3110
3111 case 'x':
3112 if (*argrest != 0) badarg = TRUE;
3113 break;
3114
3115 /* All other initial characters are errors */
3116
3117 default:
3118 badarg = TRUE;
3119 break;
3120 } /* End of high-level switch statement */
3121
3122 /* Failed to recognize the option, or syntax error */
3123
3124 if (badarg)
3125 {
3126 fprintf(stderr, "exim abandoned: unknown, malformed, or incomplete "
3127 "option %s\n", arg);
3128 exit(EXIT_FAILURE);
3129 }
3130 }
3131
3132
3133 /* If -R or -S have been specified without -q, assume a single queue run. */
3134
3135 if ((deliver_selectstring != NULL || deliver_selectstring_sender != NULL) &&
3136 queue_interval < 0) queue_interval = 0;
3137
3138
3139 END_ARG:
3140 /* If usage_wanted is set we call the usage function - which never returns */
3141 if (usage_wanted) exim_usage(called_as);
3142
3143 /* Arguments have been processed. Check for incompatibilities. */
3144 if ((
3145 (smtp_input || extract_recipients || recipients_arg < argc) &&
3146 (daemon_listen || queue_interval >= 0 || bi_option ||
3147 test_retry_arg >= 0 || test_rewrite_arg >= 0 ||
3148 filter_test != FTEST_NONE || (msg_action_arg > 0 && !one_msg_action))
3149 ) ||
3150 (
3151 msg_action_arg > 0 &&
3152 (daemon_listen || queue_interval >= 0 || list_options ||
3153 (checking && msg_action != MSG_LOAD) ||
3154 bi_option || test_retry_arg >= 0 || test_rewrite_arg >= 0)
3155 ) ||
3156 (
3157 (daemon_listen || queue_interval >= 0) &&
3158 (sender_address != NULL || list_options || list_queue || checking ||
3159 bi_option)
3160 ) ||
3161 (
3162 daemon_listen && queue_interval == 0
3163 ) ||
3164 (
3165 list_options &&
3166 (checking || smtp_input || extract_recipients ||
3167 filter_test != FTEST_NONE || bi_option)
3168 ) ||
3169 (
3170 verify_address_mode &&
3171 (address_test_mode || smtp_input || extract_recipients ||
3172 filter_test != FTEST_NONE || bi_option)
3173 ) ||
3174 (
3175 address_test_mode && (smtp_input || extract_recipients ||
3176 filter_test != FTEST_NONE || bi_option)
3177 ) ||
3178 (
3179 smtp_input && (sender_address != NULL || filter_test != FTEST_NONE ||
3180 extract_recipients)
3181 ) ||
3182 (
3183 deliver_selectstring != NULL && queue_interval < 0
3184 ) ||
3185 (
3186 msg_action == MSG_LOAD &&
3187 (!expansion_test || expansion_test_message != NULL)
3188 )
3189 )
3190 {
3191 fprintf(stderr, "exim: incompatible command-line options or arguments\n");
3192 exit(EXIT_FAILURE);
3193 }
3194
3195 /* If debugging is set up, set the file and the file descriptor to pass on to
3196 child processes. It should, of course, be 2 for stderr. Also, force the daemon
3197 to run in the foreground. */
3198
3199 if (debug_selector != 0)
3200 {
3201 debug_file = stderr;
3202 debug_fd = fileno(debug_file);
3203 background_daemon = FALSE;
3204 if (running_in_test_harness) millisleep(100); /* lets caller finish */
3205 if (debug_selector != D_v) /* -v only doesn't show this */
3206 {
3207 debug_printf("Exim version %s uid=%ld gid=%ld pid=%d D=%x\n",
3208 version_string, (long int)real_uid, (long int)real_gid, (int)getpid(),
3209 debug_selector);
3210 if (!version_printed)
3211 show_whats_supported(stderr);
3212 }
3213 }
3214
3215 /* When started with root privilege, ensure that the limits on the number of
3216 open files and the number of processes (where that is accessible) are
3217 sufficiently large, or are unset, in case Exim has been called from an
3218 environment where the limits are screwed down. Not all OS have the ability to
3219 change some of these limits. */
3220
3221 if (unprivileged)
3222 {
3223 DEBUG(D_any) debug_print_ids(US"Exim has no root privilege:");
3224 }
3225 else
3226 {
3227 struct rlimit rlp;
3228
3229 #ifdef RLIMIT_NOFILE
3230 if (getrlimit(RLIMIT_NOFILE, &rlp) < 0)
3231 {
3232 log_write(0, LOG_MAIN|LOG_PANIC, "getrlimit(RLIMIT_NOFILE) failed: %s",
3233 strerror(errno));
3234 rlp.rlim_cur = rlp.rlim_max = 0;
3235 }
3236
3237 /* I originally chose 1000 as a nice big number that was unlikely to
3238 be exceeded. It turns out that some older OS have a fixed upper limit of
3239 256. */
3240
3241 if (rlp.rlim_cur < 1000)
3242 {
3243 rlp.rlim_cur = rlp.rlim_max = 1000;
3244 if (setrlimit(RLIMIT_NOFILE, &rlp) < 0)
3245 {
3246 rlp.rlim_cur = rlp.rlim_max = 256;
3247 if (setrlimit(RLIMIT_NOFILE, &rlp) < 0)
3248 log_write(0, LOG_MAIN|LOG_PANIC, "setrlimit(RLIMIT_NOFILE) failed: %s",
3249 strerror(errno));
3250 }
3251 }
3252 #endif
3253
3254 #ifdef RLIMIT_NPROC
3255 if (getrlimit(RLIMIT_NPROC, &rlp) < 0)
3256 {
3257 log_write(0, LOG_MAIN|LOG_PANIC, "getrlimit(RLIMIT_NPROC) failed: %s",
3258 strerror(errno));
3259 rlp.rlim_cur = rlp.rlim_max = 0;
3260 }
3261
3262 #ifdef RLIM_INFINITY
3263 if (rlp.rlim_cur != RLIM_INFINITY && rlp.rlim_cur < 1000)
3264 {
3265 rlp.rlim_cur = rlp.rlim_max = RLIM_INFINITY;
3266 #else
3267 if (rlp.rlim_cur < 1000)
3268 {
3269 rlp.rlim_cur = rlp.rlim_max = 1000;
3270 #endif
3271 if (setrlimit(RLIMIT_NPROC, &rlp) < 0)
3272 log_write(0, LOG_MAIN|LOG_PANIC, "setrlimit(RLIMIT_NPROC) failed: %s",
3273 strerror(errno));
3274 }
3275 #endif
3276 }
3277
3278 /* Exim is normally entered as root (but some special configurations are
3279 possible that don't do this). However, it always spins off sub-processes that
3280 set their uid and gid as required for local delivery. We don't want to pass on
3281 any extra groups that root may belong to, so we want to get rid of them all at
3282 this point.
3283
3284 We need to obey setgroups() at this stage, before possibly giving up root
3285 privilege for a changed configuration file, but later on we might need to
3286 check on the additional groups for the admin user privilege - can't do that
3287 till after reading the config, which might specify the exim gid. Therefore,
3288 save the group list here first. */
3289
3290 group_count = getgroups(NGROUPS_MAX, group_list);
3291 if (group_count < 0)
3292 {
3293 fprintf(stderr, "exim: getgroups() failed: %s\n", strerror(errno));
3294 exit(EXIT_FAILURE);
3295 }
3296
3297 /* There is a fundamental difference in some BSD systems in the matter of
3298 groups. FreeBSD and BSDI are known to be different; NetBSD and OpenBSD are
3299 known not to be different. On the "different" systems there is a single group
3300 list, and the first entry in it is the current group. On all other versions of
3301 Unix there is a supplementary group list, which is in *addition* to the current
3302 group. Consequently, to get rid of all extraneous groups on a "standard" system
3303 you pass over 0 groups to setgroups(), while on a "different" system you pass
3304 over a single group - the current group, which is always the first group in the
3305 list. Calling setgroups() with zero groups on a "different" system results in
3306 an error return. The following code should cope with both types of system.
3307
3308 However, if this process isn't running as root, setgroups() can't be used
3309 since you have to be root to run it, even if throwing away groups. Not being
3310 root here happens only in some unusual configurations. We just ignore the
3311 error. */
3312
3313 if (setgroups(0, NULL) != 0)
3314 {
3315 if (setgroups(1, group_list) != 0 && !unprivileged)
3316 {
3317 fprintf(stderr, "exim: setgroups() failed: %s\n", strerror(errno));
3318 exit(EXIT_FAILURE);
3319 }
3320 }
3321
3322 /* If the configuration file name has been altered by an argument on the
3323 command line (either a new file name or a macro definition) and the caller is
3324 not root, or if this is a filter testing run, remove any setuid privilege the
3325 program has and run as the underlying user.
3326
3327 The exim user is locked out of this, which severely restricts the use of -C
3328 for some purposes.
3329
3330 Otherwise, set the real ids to the effective values (should be root unless run
3331 from inetd, which it can either be root or the exim uid, if one is configured).
3332
3333 There is a private mechanism for bypassing some of this, in order to make it
3334 possible to test lots of configurations automatically, without having either to
3335 recompile each time, or to patch in an actual configuration file name and other
3336 values (such as the path name). If running in the test harness, pretend that
3337 configuration file changes and macro definitions haven't happened. */
3338
3339 if (( /* EITHER */
3340 (!trusted_config || /* Config changed, or */
3341 !macros_trusted()) && /* impermissible macros and */
3342 real_uid != root_uid && /* Not root, and */
3343 !running_in_test_harness /* Not fudged */
3344 ) || /* OR */
3345 expansion_test /* expansion testing */
3346 || /* OR */
3347 filter_test != FTEST_NONE) /* Filter testing */
3348 {
3349 setgroups(group_count, group_list);
3350 exim_setugid(real_uid, real_gid, FALSE,
3351 US"-C, -D, -be or -bf forces real uid");
3352 removed_privilege = TRUE;
3353
3354 /* In the normal case when Exim is called like this, stderr is available
3355 and should be used for any logging information because attempts to write
3356 to the log will usually fail. To arrange this, we unset really_exim. However,
3357 if no stderr is available there is no point - we might as well have a go
3358 at the log (if it fails, syslog will be written).
3359
3360 Note that if the invoker is Exim, the logs remain available. Messing with
3361 this causes unlogged successful deliveries. */
3362
3363 if ((log_stderr != NULL) && (real_uid != exim_uid))
3364 really_exim = FALSE;
3365 }
3366
3367 /* Privilege is to be retained for the moment. It may be dropped later,
3368 depending on the job that this Exim process has been asked to do. For now, set
3369 the real uid to the effective so that subsequent re-execs of Exim are done by a
3370 privileged user. */
3371
3372 else exim_setugid(geteuid(), getegid(), FALSE, US"forcing real = effective");
3373
3374 /* If testing a filter, open the file(s) now, before wasting time doing other
3375 setups and reading the message. */
3376
3377 if ((filter_test & FTEST_SYSTEM) != 0)
3378 {
3379 filter_sfd = Uopen(filter_test_sfile, O_RDONLY, 0);
3380 if (filter_sfd < 0)
3381 {
3382 fprintf(stderr, "exim: failed to open %s: %s\n", filter_test_sfile,
3383 strerror(errno));
3384 return EXIT_FAILURE;
3385 }
3386 }
3387
3388 if ((filter_test & FTEST_USER) != 0)
3389 {
3390 filter_ufd = Uopen(filter_test_ufile, O_RDONLY, 0);
3391 if (filter_ufd < 0)
3392 {
3393 fprintf(stderr, "exim: failed to open %s: %s\n", filter_test_ufile,
3394 strerror(errno));
3395 return EXIT_FAILURE;
3396 }
3397 }
3398
3399 /* Read the main runtime configuration data; this gives up if there
3400 is a failure. It leaves the configuration file open so that the subsequent
3401 configuration data for delivery can be read if needed. */
3402
3403 readconf_main();
3404
3405 /* Handle the decoding of logging options. */
3406
3407 decode_bits(&log_write_selector, &log_extra_selector, 0, 0,
3408 log_selector_string, log_options, log_options_count, US"log", 0);
3409
3410 DEBUG(D_any)
3411 {
3412 debug_printf("configuration file is %s\n", config_main_filename);
3413 debug_printf("log selectors = %08x %08x\n", log_write_selector,
3414 log_extra_selector);
3415 }
3416
3417 /* If domain literals are not allowed, check the sender address that was
3418 supplied with -f. Ditto for a stripped trailing dot. */
3419
3420 if (sender_address != NULL)
3421 {
3422 if (sender_address[sender_address_domain] == '[' && !allow_domain_literals)
3423 {
3424 fprintf(stderr, "exim: bad -f address \"%s\": domain literals not "
3425 "allowed\n", sender_address);
3426 return EXIT_FAILURE;
3427 }
3428 if (f_end_dot && !strip_trailing_dot)
3429 {
3430 fprintf(stderr, "exim: bad -f address \"%s.\": domain is malformed "
3431 "(trailing dot not allowed)\n", sender_address);
3432 return EXIT_FAILURE;
3433 }
3434 }
3435
3436 /* Paranoia check of maximum lengths of certain strings. There is a check
3437 on the length of the log file path in log.c, which will come into effect
3438 if there are any calls to write the log earlier than this. However, if we
3439 get this far but the string is very long, it is better to stop now than to
3440 carry on and (e.g.) receive a message and then have to collapse. The call to
3441 log_write() from here will cause the ultimate panic collapse if the complete
3442 file name exceeds the buffer length. */
3443
3444 if (Ustrlen(log_file_path) > 200)
3445 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3446 "log_file_path is longer than 200 chars: aborting");
3447
3448 if (Ustrlen(pid_file_path) > 200)
3449 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3450 "pid_file_path is longer than 200 chars: aborting");
3451
3452 if (Ustrlen(spool_directory) > 200)
3453 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3454 "spool_directory is longer than 200 chars: aborting");
3455
3456 /* Length check on the process name given to syslog for its TAG field,
3457 which is only permitted to be 32 characters or less. See RFC 3164. */
3458
3459 if (Ustrlen(syslog_processname) > 32)
3460 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3461 "syslog_processname is longer than 32 chars: aborting");
3462
3463 /* In some operating systems, the environment variable TMPDIR controls where
3464 temporary files are created; Exim doesn't use these (apart from when delivering
3465 to MBX mailboxes), but called libraries such as DBM libraries may require them.
3466 If TMPDIR is found in the environment, reset it to the value defined in the
3467 TMPDIR macro, if this macro is defined. */
3468
3469 #ifdef TMPDIR
3470 {
3471 uschar **p;
3472 for (p = USS environ; *p != NULL; p++)
3473 {
3474 if (Ustrncmp(*p, "TMPDIR=", 7) == 0 &&
3475 Ustrcmp(*p+7, TMPDIR) != 0)
3476 {
3477 uschar *newp = malloc(Ustrlen(TMPDIR) + 8);
3478 sprintf(CS newp, "TMPDIR=%s", TMPDIR);
3479 *p = newp;
3480 DEBUG(D_any) debug_printf("reset TMPDIR=%s in environment\n", TMPDIR);
3481 }
3482 }
3483 }
3484 #endif
3485
3486 /* Timezone handling. If timezone_string is "utc", set a flag to cause all
3487 timestamps to be in UTC (gmtime() is used instead of localtime()). Otherwise,
3488 we may need to get rid of a bogus timezone setting. This can arise when Exim is
3489 called by a user who has set the TZ variable. This then affects the timestamps
3490 in log files and in Received: headers, and any created Date: header lines. The
3491 required timezone is settable in the configuration file, so nothing can be done
3492 about this earlier - but hopefully nothing will normally be logged earlier than
3493 this. We have to make a new environment if TZ is wrong, but don't bother if
3494 timestamps_utc is set, because then all times are in UTC anyway. */
3495
3496 if (timezone_string != NULL && strcmpic(timezone_string, US"UTC") == 0)
3497 {
3498 timestamps_utc = TRUE;
3499 }
3500 else
3501 {
3502 uschar *envtz = US getenv("TZ");
3503 if ((envtz == NULL && timezone_string != NULL) ||
3504 (envtz != NULL &&
3505 (timezone_string == NULL ||
3506 Ustrcmp(timezone_string, envtz) != 0)))
3507 {
3508 uschar **p = USS environ;
3509 uschar **new;
3510 uschar **newp;
3511 int count = 0;
3512 while (*p++ != NULL) count++;
3513 if (envtz == NULL) count++;
3514 newp = new = malloc(sizeof(uschar *) * (count + 1));
3515 for (p = USS environ; *p != NULL; p++)
3516 {
3517 if (Ustrncmp(*p, "TZ=", 3) == 0) continue;
3518 *newp++ = *p;
3519 }
3520 if (timezone_string != NULL)
3521 {
3522 *newp = malloc(Ustrlen(timezone_string) + 4);
3523 sprintf(CS *newp++, "TZ=%s", timezone_string);
3524 }
3525 *newp = NULL;
3526 environ = CSS new;
3527 tzset();
3528 DEBUG(D_any) debug_printf("Reset TZ to %s: time is %s\n", timezone_string,
3529 tod_stamp(tod_log));
3530 }
3531 }