dd3b5f9e7ecc38ed1932ab81804d5e29886cf295
[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(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(uschar *filename, 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;
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 debug_printf(" auxiliary group list:");
579 if (group_count > 0)
580 {
581 int i;
582 for (i = 0; i < group_count; i++) debug_printf(" %d", (int)group_list[i]);
583 }
584 else debug_printf(" <none>");
585 debug_printf("\n");
586 }
587 }
588
589
590
591
592 /*************************************************
593 * Exit point *
594 *************************************************/
595
596 /* Exim exits via this function so that it always clears up any open
597 databases.
598
599 Arguments:
600 rc return code
601
602 Returns: does not return
603 */
604
605 void
606 exim_exit(int rc)
607 {
608 search_tidyup();
609 DEBUG(D_any)
610 debug_printf(">>>>>>>>>>>>>>>> Exim pid=%d terminating with rc=%d "
611 ">>>>>>>>>>>>>>>>\n", (int)getpid(), rc);
612 exit(rc);
613 }
614
615
616
617
618 /*************************************************
619 * Extract port from host address *
620 *************************************************/
621
622 /* Called to extract the port from the values given to -oMa and -oMi.
623 It also checks the syntax of the address, and terminates it before the
624 port data when a port is extracted.
625
626 Argument:
627 address the address, with possible port on the end
628
629 Returns: the port, or zero if there isn't one
630 bombs out on a syntax error
631 */
632
633 static int
634 check_port(uschar *address)
635 {
636 int port = host_address_extract_port(address);
637 if (string_is_ip_address(address, NULL) == 0)
638 {
639 fprintf(stderr, "exim abandoned: \"%s\" is not an IP address\n", address);
640 exit(EXIT_FAILURE);
641 }
642 return port;
643 }
644
645
646
647 /*************************************************
648 * Test/verify an address *
649 *************************************************/
650
651 /* This function is called by the -bv and -bt code. It extracts a working
652 address from a full RFC 822 address. This isn't really necessary per se, but it
653 has the effect of collapsing source routes.
654
655 Arguments:
656 s the address string
657 flags flag bits for verify_address()
658 exit_value to be set for failures
659
660 Returns: nothing
661 */
662
663 static void
664 test_address(uschar *s, int flags, int *exit_value)
665 {
666 int start, end, domain;
667 uschar *parse_error = NULL;
668 uschar *address = parse_extract_address(s, &parse_error, &start, &end, &domain,
669 FALSE);
670 if (address == NULL)
671 {
672 fprintf(stdout, "syntax error: %s\n", parse_error);
673 *exit_value = 2;
674 }
675 else
676 {
677 int rc = verify_address(deliver_make_addr(address,TRUE), stdout, flags, -1,
678 -1, -1, NULL, NULL, NULL);
679 if (rc == FAIL) *exit_value = 2;
680 else if (rc == DEFER && *exit_value == 0) *exit_value = 1;
681 }
682 }
683
684
685
686 /*************************************************
687 * Show supported features *
688 *************************************************/
689
690 /* This function is called for -bV/--version and for -d to output the optional
691 features of the current Exim binary.
692
693 Arguments: a FILE for printing
694 Returns: nothing
695 */
696
697 static void
698 show_whats_supported(FILE *f)
699 {
700 #ifdef DB_VERSION_STRING
701 fprintf(f, "Berkeley DB: %s\n", DB_VERSION_STRING);
702 #elif defined(BTREEVERSION) && defined(HASHVERSION)
703 #ifdef USE_DB
704 fprintf(f, "Probably Berkeley DB version 1.8x (native mode)\n");
705 #else
706 fprintf(f, "Probably Berkeley DB version 1.8x (compatibility mode)\n");
707 #endif
708 #elif defined(_DBM_RDONLY) || defined(dbm_dirfno)
709 fprintf(f, "Probably ndbm\n");
710 #elif defined(USE_TDB)
711 fprintf(f, "Using tdb\n");
712 #else
713 #ifdef USE_GDBM
714 fprintf(f, "Probably GDBM (native mode)\n");
715 #else
716 fprintf(f, "Probably GDBM (compatibility mode)\n");
717 #endif
718 #endif
719
720 fprintf(f, "Support for:");
721 #ifdef SUPPORT_CRYPTEQ
722 fprintf(f, " crypteq");
723 #endif
724 #if HAVE_ICONV
725 fprintf(f, " iconv()");
726 #endif
727 #if HAVE_IPV6
728 fprintf(f, " IPv6");
729 #endif
730 #ifdef HAVE_SETCLASSRESOURCES
731 fprintf(f, " use_setclassresources");
732 #endif
733 #ifdef SUPPORT_PAM
734 fprintf(f, " PAM");
735 #endif
736 #ifdef EXIM_PERL
737 fprintf(f, " Perl");
738 #endif
739 #ifdef EXPAND_DLFUNC
740 fprintf(f, " Expand_dlfunc");
741 #endif
742 #ifdef USE_TCP_WRAPPERS
743 fprintf(f, " TCPwrappers");
744 #endif
745 #ifdef SUPPORT_TLS
746 #ifdef USE_GNUTLS
747 fprintf(f, " GnuTLS");
748 #else
749 fprintf(f, " OpenSSL");
750 #endif
751 #endif
752 #ifdef SUPPORT_TRANSLATE_IP_ADDRESS
753 fprintf(f, " translate_ip_address");
754 #endif
755 #ifdef SUPPORT_MOVE_FROZEN_MESSAGES
756 fprintf(f, " move_frozen_messages");
757 #endif
758 #ifdef WITH_CONTENT_SCAN
759 fprintf(f, " Content_Scanning");
760 #endif
761 #ifndef DISABLE_DKIM
762 fprintf(f, " DKIM");
763 #endif
764 #ifdef WITH_OLD_DEMIME
765 fprintf(f, " Old_Demime");
766 #endif
767 #ifdef EXPERIMENTAL_SPF
768 fprintf(f, " Experimental_SPF");
769 #endif
770 #ifdef EXPERIMENTAL_SRS
771 fprintf(f, " Experimental_SRS");
772 #endif
773 #ifdef EXPERIMENTAL_BRIGHTMAIL
774 fprintf(f, " Experimental_Brightmail");
775 #endif
776 #ifdef EXPERIMENTAL_DCC
777 fprintf(f, " Experimental_DCC");
778 #endif
779 fprintf(f, "\n");
780
781 fprintf(f, "Lookups (built-in):");
782 #if defined(LOOKUP_LSEARCH) && LOOKUP_LSEARCH!=2
783 fprintf(f, " lsearch wildlsearch nwildlsearch iplsearch");
784 #endif
785 #if defined(LOOKUP_CDB) && LOOKUP_CDB!=2
786 fprintf(f, " cdb");
787 #endif
788 #if defined(LOOKUP_DBM) && LOOKUP_DBM!=2
789 fprintf(f, " dbm dbmnz");
790 #endif
791 #if defined(LOOKUP_DNSDB) && LOOKUP_DNSDB!=2
792 fprintf(f, " dnsdb");
793 #endif
794 #if defined(LOOKUP_DSEARCH) && LOOKUP_DSEARCH!=2
795 fprintf(f, " dsearch");
796 #endif
797 #if defined(LOOKUP_IBASE) && LOOKUP_IBASE!=2
798 fprintf(f, " ibase");
799 #endif
800 #if defined(LOOKUP_LDAP) && LOOKUP_LDAP!=2
801 fprintf(f, " ldap ldapdn ldapm");
802 #endif
803 #if defined(LOOKUP_MYSQL) && LOOKUP_MYSQL!=2
804 fprintf(f, " mysql");
805 #endif
806 #if defined(LOOKUP_NIS) && LOOKUP_NIS!=2
807 fprintf(f, " nis nis0");
808 #endif
809 #if defined(LOOKUP_NISPLUS) && LOOKUP_NISPLUS!=2
810 fprintf(f, " nisplus");
811 #endif
812 #if defined(LOOKUP_ORACLE) && LOOKUP_ORACLE!=2
813 fprintf(f, " oracle");
814 #endif
815 #if defined(LOOKUP_PASSWD) && LOOKUP_PASSWD!=2
816 fprintf(f, " passwd");
817 #endif
818 #if defined(LOOKUP_PGSQL) && LOOKUP_PGSQL!=2
819 fprintf(f, " pgsql");
820 #endif
821 #if defined(LOOKUP_SQLITE) && LOOKUP_SQLITE!=2
822 fprintf(f, " sqlite");
823 #endif
824 #if defined(LOOKUP_TESTDB) && LOOKUP_TESTDB!=2
825 fprintf(f, " testdb");
826 #endif
827 #if defined(LOOKUP_WHOSON) && LOOKUP_WHOSON!=2
828 fprintf(f, " whoson");
829 #endif
830 fprintf(f, "\n");
831
832 fprintf(f, "Authenticators:");
833 #ifdef AUTH_CRAM_MD5
834 fprintf(f, " cram_md5");
835 #endif
836 #ifdef AUTH_CYRUS_SASL
837 fprintf(f, " cyrus_sasl");
838 #endif
839 #ifdef AUTH_DOVECOT
840 fprintf(f, " dovecot");
841 #endif
842 #ifdef AUTH_PLAINTEXT
843 fprintf(f, " plaintext");
844 #endif
845 #ifdef AUTH_SPA
846 fprintf(f, " spa");
847 #endif
848 fprintf(f, "\n");
849
850 fprintf(f, "Routers:");
851 #ifdef ROUTER_ACCEPT
852 fprintf(f, " accept");
853 #endif
854 #ifdef ROUTER_DNSLOOKUP
855 fprintf(f, " dnslookup");
856 #endif
857 #ifdef ROUTER_IPLITERAL
858 fprintf(f, " ipliteral");
859 #endif
860 #ifdef ROUTER_IPLOOKUP
861 fprintf(f, " iplookup");
862 #endif
863 #ifdef ROUTER_MANUALROUTE
864 fprintf(f, " manualroute");
865 #endif
866 #ifdef ROUTER_QUERYPROGRAM
867 fprintf(f, " queryprogram");
868 #endif
869 #ifdef ROUTER_REDIRECT
870 fprintf(f, " redirect");
871 #endif
872 fprintf(f, "\n");
873
874 fprintf(f, "Transports:");
875 #ifdef TRANSPORT_APPENDFILE
876 fprintf(f, " appendfile");
877 #ifdef SUPPORT_MAILDIR
878 fprintf(f, "/maildir");
879 #endif
880 #ifdef SUPPORT_MAILSTORE
881 fprintf(f, "/mailstore");
882 #endif
883 #ifdef SUPPORT_MBX
884 fprintf(f, "/mbx");
885 #endif
886 #endif
887 #ifdef TRANSPORT_AUTOREPLY
888 fprintf(f, " autoreply");
889 #endif
890 #ifdef TRANSPORT_LMTP
891 fprintf(f, " lmtp");
892 #endif
893 #ifdef TRANSPORT_PIPE
894 fprintf(f, " pipe");
895 #endif
896 #ifdef TRANSPORT_SMTP
897 fprintf(f, " smtp");
898 #endif
899 fprintf(f, "\n");
900
901 if (fixed_never_users[0] > 0)
902 {
903 int i;
904 fprintf(f, "Fixed never_users: ");
905 for (i = 1; i <= (int)fixed_never_users[0] - 1; i++)
906 fprintf(f, "%d:", (unsigned int)fixed_never_users[i]);
907 fprintf(f, "%d\n", (unsigned int)fixed_never_users[i]);
908 }
909
910 fprintf(f, "Size of off_t: " SIZE_T_FMT "\n", sizeof(off_t));
911
912 /* This runtime check is to help diagnose library linkage mismatches which
913 result in segfaults and the like; as such, it's left until the end,
914 just in case. There will still be a "Configuration file is" line still to
915 come. */
916 #ifdef SUPPORT_TLS
917 tls_version_report(f);
918 #endif
919
920 /* Everything else is details which are only worth reporting when debugging.
921 Perhaps the tls_version_report should move into this too. */
922 DEBUG(D_any) do {
923
924 int i;
925
926 #ifdef AUTH_CYRUS_SASL
927 auth_cyrus_sasl_version_report(f);
928 #endif
929
930 fprintf(f, "Library version: PCRE: Compile: %d.%d%s\n"
931 " Runtime: %s\n",
932 PCRE_MAJOR, PCRE_MINOR,
933 /* PRE_PRERELEASE is either defined and empty or a string.
934 * This should work: */
935 PCRE_PRERELEASE "",
936 pcre_version());
937
938 init_lookup_list();
939 for (i = 0; i < lookup_list_count; i++)
940 {
941 if (lookup_list[i]->version_report)
942 lookup_list[i]->version_report(f);
943 }
944
945 } while (0);
946 }
947
948
949
950
951 /*************************************************
952 * Quote a local part *
953 *************************************************/
954
955 /* This function is used when a sender address or a From: or Sender: header
956 line is being created from the caller's login, or from an authenticated_id. It
957 applies appropriate quoting rules for a local part.
958
959 Argument: the local part
960 Returns: the local part, quoted if necessary
961 */
962
963 uschar *
964 local_part_quote(uschar *lpart)
965 {
966 BOOL needs_quote = FALSE;
967 int size, ptr;
968 uschar *yield;
969 uschar *t;
970
971 for (t = lpart; !needs_quote && *t != 0; t++)
972 {
973 needs_quote = !isalnum(*t) && strchr("!#$%&'*+-/=?^_`{|}~", *t) == NULL &&
974 (*t != '.' || t == lpart || t[1] == 0);
975 }
976
977 if (!needs_quote) return lpart;
978
979 size = ptr = 0;
980 yield = string_cat(NULL, &size, &ptr, US"\"", 1);
981
982 for (;;)
983 {
984 uschar *nq = US Ustrpbrk(lpart, "\\\"");
985 if (nq == NULL)
986 {
987 yield = string_cat(yield, &size, &ptr, lpart, Ustrlen(lpart));
988 break;
989 }
990 yield = string_cat(yield, &size, &ptr, lpart, nq - lpart);
991 yield = string_cat(yield, &size, &ptr, US"\\", 1);
992 yield = string_cat(yield, &size, &ptr, nq, 1);
993 lpart = nq + 1;
994 }
995
996 yield = string_cat(yield, &size, &ptr, US"\"", 1);
997 yield[ptr] = 0;
998 return yield;
999 }
1000
1001
1002
1003 #ifdef USE_READLINE
1004 /*************************************************
1005 * Load readline() functions *
1006 *************************************************/
1007
1008 /* This function is called from testing executions that read data from stdin,
1009 but only when running as the calling user. Currently, only -be does this. The
1010 function loads the readline() function library and passes back the functions.
1011 On some systems, it needs the curses library, so load that too, but try without
1012 it if loading fails. All this functionality has to be requested at build time.
1013
1014 Arguments:
1015 fn_readline_ptr pointer to where to put the readline pointer
1016 fn_addhist_ptr pointer to where to put the addhistory function
1017
1018 Returns: the dlopen handle or NULL on failure
1019 */
1020
1021 static void *
1022 set_readline(char * (**fn_readline_ptr)(char *),
1023 char * (**fn_addhist_ptr)(char *))
1024 {
1025 void *dlhandle;
1026 void *dlhandle_curses = dlopen("libcurses.so", RTLD_GLOBAL|RTLD_LAZY);
1027
1028 dlhandle = dlopen("libreadline.so", RTLD_GLOBAL|RTLD_NOW);
1029 if (dlhandle_curses != NULL) dlclose(dlhandle_curses);
1030
1031 if (dlhandle != NULL)
1032 {
1033 *fn_readline_ptr = (char *(*)(char*))dlsym(dlhandle, "readline");
1034 *fn_addhist_ptr = (char *(*)(char*))dlsym(dlhandle, "add_history");
1035 }
1036 else
1037 {
1038 DEBUG(D_any) debug_printf("failed to load readline: %s\n", dlerror());
1039 }
1040
1041 return dlhandle;
1042 }
1043 #endif
1044
1045
1046
1047 /*************************************************
1048 * Get a line from stdin for testing things *
1049 *************************************************/
1050
1051 /* This function is called when running tests that can take a number of lines
1052 of input (for example, -be and -bt). It handles continuations and trailing
1053 spaces. And prompting and a blank line output on eof. If readline() is in use,
1054 the arguments are non-NULL and provide the relevant functions.
1055
1056 Arguments:
1057 fn_readline readline function or NULL
1058 fn_addhist addhist function or NULL
1059
1060 Returns: pointer to dynamic memory, or NULL at end of file
1061 */
1062
1063 static uschar *
1064 get_stdinput(char *(*fn_readline)(char *), char *(*fn_addhist)(char *))
1065 {
1066 int i;
1067 int size = 0;
1068 int ptr = 0;
1069 uschar *yield = NULL;
1070
1071 if (fn_readline == NULL) { printf("> "); fflush(stdout); }
1072
1073 for (i = 0;; i++)
1074 {
1075 uschar buffer[1024];
1076 uschar *p, *ss;
1077
1078 #ifdef USE_READLINE
1079 char *readline_line = NULL;
1080 if (fn_readline != NULL)
1081 {
1082 if ((readline_line = fn_readline((i > 0)? "":"> ")) == NULL) break;
1083 if (*readline_line != 0 && fn_addhist != NULL) fn_addhist(readline_line);
1084 p = US readline_line;
1085 }
1086 else
1087 #endif
1088
1089 /* readline() not in use */
1090
1091 {
1092 if (Ufgets(buffer, sizeof(buffer), stdin) == NULL) break;
1093 p = buffer;
1094 }
1095
1096 /* Handle the line */
1097
1098 ss = p + (int)Ustrlen(p);
1099 while (ss > p && isspace(ss[-1])) ss--;
1100
1101 if (i > 0)
1102 {
1103 while (p < ss && isspace(*p)) p++; /* leading space after cont */
1104 }
1105
1106 yield = string_cat(yield, &size, &ptr, p, ss - p);
1107
1108 #ifdef USE_READLINE
1109 if (fn_readline != NULL) free(readline_line);
1110 #endif
1111
1112 if (ss == p || yield[ptr-1] != '\\')
1113 {
1114 yield[ptr] = 0;
1115 break;
1116 }
1117 yield[--ptr] = 0;
1118 }
1119
1120 if (yield == NULL) printf("\n");
1121 return yield;
1122 }
1123
1124
1125
1126 /*************************************************
1127 * Output usage information for the program *
1128 *************************************************/
1129
1130 /* This function is called when there are no recipients
1131 or a specific --help argument was added.
1132
1133 Arguments:
1134 progname information on what name we were called by
1135
1136 Returns: DOES NOT RETURN
1137 */
1138
1139 static void
1140 exim_usage(uschar *progname)
1141 {
1142
1143 /* Handle specific program invocation varients */
1144 if (Ustrcmp(progname, US"-mailq") == 0)
1145 {
1146 fprintf(stderr,
1147 "mailq - list the contents of the mail queue\n\n"
1148 "For a list of options, see the Exim documentation.\n");
1149 exit(EXIT_FAILURE);
1150 }
1151
1152 /* Generic usage - we output this whatever happens */
1153 fprintf(stderr,
1154 "Exim is a Mail Transfer Agent. It is normally called by Mail User Agents,\n"
1155 "not directly from a shell command line. Options and/or arguments control\n"
1156 "what it does when called. For a list of options, see the Exim documentation.\n");
1157
1158 exit(EXIT_FAILURE);
1159 }
1160
1161
1162
1163 /*************************************************
1164 * Validate that the macros given are okay *
1165 *************************************************/
1166
1167 /* Typically, Exim will drop privileges if macros are supplied. In some
1168 cases, we want to not do so.
1169
1170 Arguments: none (macros is a global)
1171 Returns: true if trusted, false otherwise
1172 */
1173
1174 static BOOL
1175 macros_trusted(void)
1176 {
1177 #ifdef WHITELIST_D_MACROS
1178 macro_item *m;
1179 uschar *whitelisted, *end, *p, **whites, **w;
1180 int white_count, i, n;
1181 size_t len;
1182 BOOL prev_char_item, found;
1183 #endif
1184
1185 if (macros == NULL)
1186 return TRUE;
1187 #ifndef WHITELIST_D_MACROS
1188 return FALSE;
1189 #else
1190
1191 /* We only trust -D overrides for some invoking users:
1192 root, the exim run-time user, the optional config owner user.
1193 I don't know why config-owner would be needed, but since they can own the
1194 config files anyway, there's no security risk to letting them override -D. */
1195 if ( ! ((real_uid == root_uid)
1196 || (real_uid == exim_uid)
1197 #ifdef CONFIGURE_OWNER
1198 || (real_uid == config_uid)
1199 #endif
1200 ))
1201 {
1202 debug_printf("macros_trusted rejecting macros for uid %d\n", (int) real_uid);
1203 return FALSE;
1204 }
1205
1206 /* Get a list of macros which are whitelisted */
1207 whitelisted = string_copy_malloc(US WHITELIST_D_MACROS);
1208 prev_char_item = FALSE;
1209 white_count = 0;
1210 for (p = whitelisted; *p != '\0'; ++p)
1211 {
1212 if (*p == ':' || isspace(*p))
1213 {
1214 *p = '\0';
1215 if (prev_char_item)
1216 ++white_count;
1217 prev_char_item = FALSE;
1218 continue;
1219 }
1220 if (!prev_char_item)
1221 prev_char_item = TRUE;
1222 }
1223 end = p;
1224 if (prev_char_item)
1225 ++white_count;
1226 if (!white_count)
1227 return FALSE;
1228 whites = store_malloc(sizeof(uschar *) * (white_count+1));
1229 for (p = whitelisted, i = 0; (p != end) && (i < white_count); ++p)
1230 {
1231 if (*p != '\0')
1232 {
1233 whites[i++] = p;
1234 if (i == white_count)
1235 break;
1236 while (*p != '\0' && p < end)
1237 ++p;
1238 }
1239 }
1240 whites[i] = NULL;
1241
1242 /* The list of macros should be very short. Accept the N*M complexity. */
1243 for (m = macros; m != NULL; m = m->next)
1244 {
1245 found = FALSE;
1246 for (w = whites; *w; ++w)
1247 if (Ustrcmp(*w, m->name) == 0)
1248 {
1249 found = TRUE;
1250 break;
1251 }
1252 if (!found)
1253 return FALSE;
1254 if (m->replacement == NULL)
1255 continue;
1256 len = Ustrlen(m->replacement);
1257 if (len == 0)
1258 continue;
1259 n = pcre_exec(regex_whitelisted_macro, NULL, CS m->replacement, len,
1260 0, PCRE_EOPT, NULL, 0);
1261 if (n < 0)
1262 {
1263 if (n != PCRE_ERROR_NOMATCH)
1264 debug_printf("macros_trusted checking %s returned %d\n", m->name, n);
1265 return FALSE;
1266 }
1267 }
1268 debug_printf("macros_trusted overriden to true by whitelisting\n");
1269 return TRUE;
1270 #endif
1271 }
1272
1273
1274 /*************************************************
1275 * Entry point and high-level code *
1276 *************************************************/
1277
1278 /* Entry point for the Exim mailer. Analyse the arguments and arrange to take
1279 the appropriate action. All the necessary functions are present in the one
1280 binary. I originally thought one should split it up, but it turns out that so
1281 much of the apparatus is needed in each chunk that one might as well just have
1282 it all available all the time, which then makes the coding easier as well.
1283
1284 Arguments:
1285 argc count of entries in argv
1286 argv argument strings, with argv[0] being the program name
1287
1288 Returns: EXIT_SUCCESS if terminated successfully
1289 EXIT_FAILURE otherwise, except when a message has been sent
1290 to the sender, and -oee was given
1291 */
1292
1293 int
1294 main(int argc, char **cargv)
1295 {
1296 uschar **argv = USS cargv;
1297 int arg_receive_timeout = -1;
1298 int arg_smtp_receive_timeout = -1;
1299 int arg_error_handling = error_handling;
1300 int filter_sfd = -1;
1301 int filter_ufd = -1;
1302 int group_count;
1303 int i;
1304 int list_queue_option = 0;
1305 int msg_action = 0;
1306 int msg_action_arg = -1;
1307 int namelen = (argv[0] == NULL)? 0 : Ustrlen(argv[0]);
1308 int queue_only_reason = 0;
1309 #ifdef EXIM_PERL
1310 int perl_start_option = 0;
1311 #endif
1312 int recipients_arg = argc;
1313 int sender_address_domain = 0;
1314 int test_retry_arg = -1;
1315 int test_rewrite_arg = -1;
1316 BOOL arg_queue_only = FALSE;
1317 BOOL bi_option = FALSE;
1318 BOOL checking = FALSE;
1319 BOOL count_queue = FALSE;
1320 BOOL expansion_test = FALSE;
1321 BOOL extract_recipients = FALSE;
1322 BOOL forced_delivery = FALSE;
1323 BOOL f_end_dot = FALSE;
1324 BOOL deliver_give_up = FALSE;
1325 BOOL list_queue = FALSE;
1326 BOOL list_options = FALSE;
1327 BOOL local_queue_only;
1328 BOOL more = TRUE;
1329 BOOL one_msg_action = FALSE;
1330 BOOL queue_only_set = FALSE;
1331 BOOL receiving_message = TRUE;
1332 BOOL sender_ident_set = FALSE;
1333 BOOL session_local_queue_only;
1334 BOOL unprivileged;
1335 BOOL removed_privilege = FALSE;
1336 BOOL usage_wanted = FALSE;
1337 BOOL verify_address_mode = FALSE;
1338 BOOL verify_as_sender = FALSE;
1339 BOOL version_printed = FALSE;
1340 uschar *alias_arg = NULL;
1341 uschar *called_as = US"";
1342 uschar *start_queue_run_id = NULL;
1343 uschar *stop_queue_run_id = NULL;
1344 uschar *expansion_test_message = NULL;
1345 uschar *ftest_domain = NULL;
1346 uschar *ftest_localpart = NULL;
1347 uschar *ftest_prefix = NULL;
1348 uschar *ftest_suffix = NULL;
1349 uschar *malware_test_file = NULL;
1350 uschar *real_sender_address;
1351 uschar *originator_home = US"/";
1352 void *reset_point;
1353
1354 struct passwd *pw;
1355 struct stat statbuf;
1356 pid_t passed_qr_pid = (pid_t)0;
1357 int passed_qr_pipe = -1;
1358 gid_t group_list[NGROUPS_MAX];
1359
1360 /* Possible options for -R and -S */
1361
1362 static uschar *rsopts[] = { US"f", US"ff", US"r", US"rf", US"rff" };
1363
1364 /* Need to define this in case we need to change the environment in order
1365 to get rid of a bogus time zone. We have to make it char rather than uschar
1366 because some OS define it in /usr/include/unistd.h. */
1367
1368 extern char **environ;
1369
1370 /* If the Exim user and/or group and/or the configuration file owner/group were
1371 defined by ref:name at build time, we must now find the actual uid/gid values.
1372 This is a feature to make the lives of binary distributors easier. */
1373
1374 #ifdef EXIM_USERNAME
1375 if (route_finduser(US EXIM_USERNAME, &pw, &exim_uid))
1376 {
1377 if (exim_uid == 0)
1378 {
1379 fprintf(stderr, "exim: refusing to run with uid 0 for \"%s\"\n",
1380 EXIM_USERNAME);
1381 exit(EXIT_FAILURE);
1382 }
1383 exim_gid = pw->pw_gid;
1384 }
1385 else
1386 {
1387 fprintf(stderr, "exim: failed to find uid for user name \"%s\"\n",
1388 EXIM_USERNAME);
1389 exit(EXIT_FAILURE);
1390 }
1391 #endif
1392
1393 #ifdef EXIM_GROUPNAME
1394 if (!route_findgroup(US EXIM_GROUPNAME, &exim_gid))
1395 {
1396 fprintf(stderr, "exim: failed to find gid for group name \"%s\"\n",
1397 EXIM_GROUPNAME);
1398 exit(EXIT_FAILURE);
1399 }
1400 #endif
1401
1402 #ifdef CONFIGURE_OWNERNAME
1403 if (!route_finduser(US CONFIGURE_OWNERNAME, NULL, &config_uid))
1404 {
1405 fprintf(stderr, "exim: failed to find uid for user name \"%s\"\n",
1406 CONFIGURE_OWNERNAME);
1407 exit(EXIT_FAILURE);
1408 }
1409 #endif
1410
1411 /* We default the system_filter_user to be the Exim run-time user, as a
1412 sane non-root value. */
1413 system_filter_uid = exim_uid;
1414
1415 #ifdef CONFIGURE_GROUPNAME
1416 if (!route_findgroup(US CONFIGURE_GROUPNAME, &config_gid))
1417 {
1418 fprintf(stderr, "exim: failed to find gid for group name \"%s\"\n",
1419 CONFIGURE_GROUPNAME);
1420 exit(EXIT_FAILURE);
1421 }
1422 #endif
1423
1424 /* In the Cygwin environment, some initialization needs doing. It is fudged
1425 in by means of this macro. */
1426
1427 #ifdef OS_INIT
1428 OS_INIT
1429 #endif
1430
1431 /* Check a field which is patched when we are running Exim within its
1432 testing harness; do a fast initial check, and then the whole thing. */
1433
1434 running_in_test_harness =
1435 *running_status == '<' && Ustrcmp(running_status, "<<<testing>>>") == 0;
1436
1437 /* The C standard says that the equivalent of setlocale(LC_ALL, "C") is obeyed
1438 at the start of a program; however, it seems that some environments do not
1439 follow this. A "strange" locale can affect the formatting of timestamps, so we
1440 make quite sure. */
1441
1442 setlocale(LC_ALL, "C");
1443
1444 /* Set up the default handler for timing using alarm(). */
1445
1446 os_non_restarting_signal(SIGALRM, sigalrm_handler);
1447
1448 /* Ensure we have a buffer for constructing log entries. Use malloc directly,
1449 because store_malloc writes a log entry on failure. */
1450
1451 log_buffer = (uschar *)malloc(LOG_BUFFER_SIZE);
1452 if (log_buffer == NULL)
1453 {
1454 fprintf(stderr, "exim: failed to get store for log buffer\n");
1455 exit(EXIT_FAILURE);
1456 }
1457
1458 /* Set log_stderr to stderr, provided that stderr exists. This gets reset to
1459 NULL when the daemon is run and the file is closed. We have to use this
1460 indirection, because some systems don't allow writing to the variable "stderr".
1461 */
1462
1463 if (fstat(fileno(stderr), &statbuf) >= 0) log_stderr = stderr;
1464
1465 /* Arrange for the PCRE regex library to use our store functions. Note that
1466 the normal calls are actually macros that add additional arguments for
1467 debugging purposes so we have to assign specially constructed functions here.
1468 The default is to use store in the stacking pool, but this is overridden in the
1469 regex_must_compile() function. */
1470
1471 pcre_malloc = function_store_get;
1472 pcre_free = function_dummy_free;
1473
1474 /* Ensure there is a big buffer for temporary use in several places. It is put
1475 in malloc store so that it can be freed for enlargement if necessary. */
1476
1477 big_buffer = store_malloc(big_buffer_size);
1478
1479 /* Set up the handler for the data request signal, and set the initial
1480 descriptive text. */
1481
1482 set_process_info("initializing");
1483 os_restarting_signal(SIGUSR1, usr1_handler);
1484
1485 /* SIGHUP is used to get the daemon to reconfigure. It gets set as appropriate
1486 in the daemon code. For the rest of Exim's uses, we ignore it. */
1487
1488 signal(SIGHUP, SIG_IGN);
1489
1490 /* We don't want to die on pipe errors as the code is written to handle
1491 the write error instead. */
1492
1493 signal(SIGPIPE, SIG_IGN);
1494
1495 /* Under some circumstance on some OS, Exim can get called with SIGCHLD
1496 set to SIG_IGN. This causes subprocesses that complete before the parent
1497 process waits for them not to hang around, so when Exim calls wait(), nothing
1498 is there. The wait() code has been made robust against this, but let's ensure
1499 that SIGCHLD is set to SIG_DFL, because it's tidier to wait and get a process
1500 ending status. We use sigaction rather than plain signal() on those OS where
1501 SA_NOCLDWAIT exists, because we want to be sure it is turned off. (There was a
1502 problem on AIX with this.) */
1503
1504 #ifdef SA_NOCLDWAIT
1505 {
1506 struct sigaction act;
1507 act.sa_handler = SIG_DFL;
1508 sigemptyset(&(act.sa_mask));
1509 act.sa_flags = 0;
1510 sigaction(SIGCHLD, &act, NULL);
1511 }
1512 #else
1513 signal(SIGCHLD, SIG_DFL);
1514 #endif
1515
1516 /* Save the arguments for use if we re-exec exim as a daemon after receiving
1517 SIGHUP. */
1518
1519 sighup_argv = argv;
1520
1521 /* Set up the version number. Set up the leading 'E' for the external form of
1522 message ids, set the pointer to the internal form, and initialize it to
1523 indicate no message being processed. */
1524
1525 version_init();
1526 message_id_option[0] = '-';
1527 message_id_external = message_id_option + 1;
1528 message_id_external[0] = 'E';
1529 message_id = message_id_external + 1;
1530 message_id[0] = 0;
1531
1532 /* Set the umask to zero so that any files Exim creates using open() are
1533 created with the modes that it specifies. NOTE: Files created with fopen() have
1534 a problem, which was not recognized till rather late (February 2006). With this
1535 umask, such files will be world writeable. (They are all content scanning files
1536 in the spool directory, which isn't world-accessible, so this is not a
1537 disaster, but it's untidy.) I don't want to change this overall setting,
1538 however, because it will interact badly with the open() calls. Instead, there's
1539 now a function called modefopen() that fiddles with the umask while calling
1540 fopen(). */
1541
1542 (void)umask(0);
1543
1544 /* Precompile the regular expression for matching a message id. Keep this in
1545 step with the code that generates ids in the accept.c module. We need to do
1546 this here, because the -M options check their arguments for syntactic validity
1547 using mac_ismsgid, which uses this. */
1548
1549 regex_ismsgid =
1550 regex_must_compile(US"^(?:[^\\W_]{6}-){2}[^\\W_]{2}$", FALSE, TRUE);
1551
1552 /* Precompile the regular expression that is used for matching an SMTP error
1553 code, possibly extended, at the start of an error message. Note that the
1554 terminating whitespace character is included. */
1555
1556 regex_smtp_code =
1557 regex_must_compile(US"^\\d\\d\\d\\s(?:\\d\\.\\d\\d?\\d?\\.\\d\\d?\\d?\\s)?",
1558 FALSE, TRUE);
1559
1560 #ifdef WHITELIST_D_MACROS
1561 /* Precompile the regular expression used to filter the content of macros
1562 given to -D for permissibility. */
1563
1564 regex_whitelisted_macro =
1565 regex_must_compile(US"^[A-Za-z0-9_/.-]*$", FALSE, TRUE);
1566 #endif
1567
1568
1569 /* If the program is called as "mailq" treat it as equivalent to "exim -bp";
1570 this seems to be a generally accepted convention, since one finds symbolic
1571 links called "mailq" in standard OS configurations. */
1572
1573 if ((namelen == 5 && Ustrcmp(argv[0], "mailq") == 0) ||
1574 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/mailq", 6) == 0))
1575 {
1576 list_queue = TRUE;
1577 receiving_message = FALSE;
1578 called_as = US"-mailq";
1579 }
1580
1581 /* If the program is called as "rmail" treat it as equivalent to
1582 "exim -i -oee", thus allowing UUCP messages to be input using non-SMTP mode,
1583 i.e. preventing a single dot on a line from terminating the message, and
1584 returning with zero return code, even in cases of error (provided an error
1585 message has been sent). */
1586
1587 if ((namelen == 5 && Ustrcmp(argv[0], "rmail") == 0) ||
1588 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/rmail", 6) == 0))
1589 {
1590 dot_ends = FALSE;
1591 called_as = US"-rmail";
1592 errors_sender_rc = EXIT_SUCCESS;
1593 }
1594
1595 /* If the program is called as "rsmtp" treat it as equivalent to "exim -bS";
1596 this is a smail convention. */
1597
1598 if ((namelen == 5 && Ustrcmp(argv[0], "rsmtp") == 0) ||
1599 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/rsmtp", 6) == 0))
1600 {
1601 smtp_input = smtp_batched_input = TRUE;
1602 called_as = US"-rsmtp";
1603 }
1604
1605 /* If the program is called as "runq" treat it as equivalent to "exim -q";
1606 this is a smail convention. */
1607
1608 if ((namelen == 4 && Ustrcmp(argv[0], "runq") == 0) ||
1609 (namelen > 4 && Ustrncmp(argv[0] + namelen - 5, "/runq", 5) == 0))
1610 {
1611 queue_interval = 0;
1612 receiving_message = FALSE;
1613 called_as = US"-runq";
1614 }
1615
1616 /* If the program is called as "newaliases" treat it as equivalent to
1617 "exim -bi"; this is a sendmail convention. */
1618
1619 if ((namelen == 10 && Ustrcmp(argv[0], "newaliases") == 0) ||
1620 (namelen > 10 && Ustrncmp(argv[0] + namelen - 11, "/newaliases", 11) == 0))
1621 {
1622 bi_option = TRUE;
1623 receiving_message = FALSE;
1624 called_as = US"-newaliases";
1625 }
1626
1627 /* Save the original effective uid for a couple of uses later. It should
1628 normally be root, but in some esoteric environments it may not be. */
1629
1630 original_euid = geteuid();
1631
1632 /* Get the real uid and gid. If the caller is root, force the effective uid/gid
1633 to be the same as the real ones. This makes a difference only if Exim is setuid
1634 (or setgid) to something other than root, which could be the case in some
1635 special configurations. */
1636
1637 real_uid = getuid();
1638 real_gid = getgid();
1639
1640 if (real_uid == root_uid)
1641 {
1642 setgid(real_gid);
1643 setuid(real_uid);
1644 }
1645
1646 /* If neither the original real uid nor the original euid was root, Exim is
1647 running in an unprivileged state. */
1648
1649 unprivileged = (real_uid != root_uid && original_euid != root_uid);
1650
1651 /* Scan the program's arguments. Some can be dealt with right away; others are
1652 simply recorded for checking and handling afterwards. Do a high-level switch
1653 on the second character (the one after '-'), to save some effort. */
1654
1655 for (i = 1; i < argc; i++)
1656 {
1657 BOOL badarg = FALSE;
1658 uschar *arg = argv[i];
1659 uschar *argrest;
1660 int switchchar;
1661
1662 /* An argument not starting with '-' is the start of a recipients list;
1663 break out of the options-scanning loop. */
1664
1665 if (arg[0] != '-')
1666 {
1667 recipients_arg = i;
1668 break;
1669 }
1670
1671 /* An option consistion of -- terminates the options */
1672
1673 if (Ustrcmp(arg, "--") == 0)
1674 {
1675 recipients_arg = i + 1;
1676 break;
1677 }
1678
1679 /* Handle flagged options */
1680
1681 switchchar = arg[1];
1682 argrest = arg+2;
1683
1684 /* Make all -ex options synonymous with -oex arguments, since that
1685 is assumed by various callers. Also make -qR options synonymous with -R
1686 options, as that seems to be required as well. Allow for -qqR too, and
1687 the same for -S options. */
1688
1689 if (Ustrncmp(arg+1, "oe", 2) == 0 ||
1690 Ustrncmp(arg+1, "qR", 2) == 0 ||
1691 Ustrncmp(arg+1, "qS", 2) == 0)
1692 {
1693 switchchar = arg[2];
1694 argrest++;
1695 }
1696 else if (Ustrncmp(arg+1, "qqR", 3) == 0 || Ustrncmp(arg+1, "qqS", 3) == 0)
1697 {
1698 switchchar = arg[3];
1699 argrest += 2;
1700 queue_2stage = TRUE;
1701 }
1702
1703 /* Make -r synonymous with -f, since it is a documented alias */
1704
1705 else if (arg[1] == 'r') switchchar = 'f';
1706
1707 /* Make -ov synonymous with -v */
1708
1709 else if (Ustrcmp(arg, "-ov") == 0)
1710 {
1711 switchchar = 'v';
1712 argrest++;
1713 }
1714
1715 /* deal with --option_aliases */
1716 else if (switchchar == '-')
1717 {
1718 if (Ustrcmp(argrest, "help") == 0)
1719 {
1720 usage_wanted = TRUE;
1721 break;
1722 }
1723 else if (Ustrcmp(argrest, "version") == 0)
1724 {
1725 switchchar = 'b';
1726 argrest = US"V";
1727 }
1728 }
1729
1730 /* High-level switch on active initial letter */
1731
1732 switch(switchchar)
1733 {
1734 /* -Btype is a sendmail option for 7bit/8bit setting. Exim is 8-bit clean
1735 so has no need of it. */
1736
1737 case 'B':
1738 if (*argrest == 0) i++; /* Skip over the type */
1739 break;
1740
1741
1742 case 'b':
1743 receiving_message = FALSE; /* Reset TRUE for -bm, -bS, -bs below */
1744
1745 /* -bd: Run in daemon mode, awaiting SMTP connections.
1746 -bdf: Ditto, but in the foreground.
1747 */
1748
1749 if (*argrest == 'd')
1750 {
1751 daemon_listen = TRUE;
1752 if (*(++argrest) == 'f') background_daemon = FALSE;
1753 else if (*argrest != 0) { badarg = TRUE; break; }
1754 }
1755
1756 /* -be: Run in expansion test mode
1757 -bem: Ditto, but read a message from a file first
1758 */
1759
1760 else if (*argrest == 'e')
1761 {
1762 expansion_test = checking = TRUE;
1763 if (argrest[1] == 'm')
1764 {
1765 if (++i >= argc) { badarg = TRUE; break; }
1766 expansion_test_message = argv[i];
1767 argrest++;
1768 }
1769 if (argrest[1] != 0) { badarg = TRUE; break; }
1770 }
1771
1772 /* -bF: Run system filter test */
1773
1774 else if (*argrest == 'F')
1775 {
1776 filter_test |= FTEST_SYSTEM;
1777 if (*(++argrest) != 0) { badarg = TRUE; break; }
1778 if (++i < argc) filter_test_sfile = argv[i]; else
1779 {
1780 fprintf(stderr, "exim: file name expected after %s\n", argv[i-1]);
1781 exit(EXIT_FAILURE);
1782 }
1783 }
1784
1785 /* -bf: Run user filter test
1786 -bfd: Set domain for filter testing
1787 -bfl: Set local part for filter testing
1788 -bfp: Set prefix for filter testing
1789 -bfs: Set suffix for filter testing
1790 */
1791
1792 else if (*argrest == 'f')
1793 {
1794 if (*(++argrest) == 0)
1795 {
1796 filter_test |= FTEST_USER;
1797 if (++i < argc) filter_test_ufile = argv[i]; else
1798 {
1799 fprintf(stderr, "exim: file name expected after %s\n", argv[i-1]);
1800 exit(EXIT_FAILURE);
1801 }
1802 }
1803 else
1804 {
1805 if (++i >= argc)
1806 {
1807 fprintf(stderr, "exim: string expected after %s\n", arg);
1808 exit(EXIT_FAILURE);
1809 }
1810 if (Ustrcmp(argrest, "d") == 0) ftest_domain = argv[i];
1811 else if (Ustrcmp(argrest, "l") == 0) ftest_localpart = argv[i];
1812 else if (Ustrcmp(argrest, "p") == 0) ftest_prefix = argv[i];
1813 else if (Ustrcmp(argrest, "s") == 0) ftest_suffix = argv[i];
1814 else { badarg = TRUE; break; }
1815 }
1816 }
1817
1818 /* -bh: Host checking - an IP address must follow. */
1819
1820 else if (Ustrcmp(argrest, "h") == 0 || Ustrcmp(argrest, "hc") == 0)
1821 {
1822 if (++i >= argc) { badarg = TRUE; break; }
1823 sender_host_address = argv[i];
1824 host_checking = checking = log_testing_mode = TRUE;
1825 host_checking_callout = argrest[1] == 'c';
1826 }
1827
1828 /* -bi: This option is used by sendmail to initialize *the* alias file,
1829 though it has the -oA option to specify a different file. Exim has no
1830 concept of *the* alias file, but since Sun's YP make script calls
1831 sendmail this way, some support must be provided. */
1832
1833 else if (Ustrcmp(argrest, "i") == 0) bi_option = TRUE;
1834
1835 /* -bm: Accept and deliver message - the default option. Reinstate
1836 receiving_message, which got turned off for all -b options. */
1837
1838 else if (Ustrcmp(argrest, "m") == 0) receiving_message = TRUE;
1839
1840 /* -bmalware: test the filename given for malware */
1841
1842 else if (Ustrcmp(argrest, "malware") == 0)
1843 {
1844 if (++i >= argc) { badarg = TRUE; break; }
1845 malware_test_file = argv[i];
1846 }
1847
1848 /* -bnq: For locally originating messages, do not qualify unqualified
1849 addresses. In the envelope, this causes errors; in header lines they
1850 just get left. */
1851
1852 else if (Ustrcmp(argrest, "nq") == 0)
1853 {
1854 allow_unqualified_sender = FALSE;
1855 allow_unqualified_recipient = FALSE;
1856 }
1857
1858 /* -bpxx: List the contents of the mail queue, in various forms. If
1859 the option is -bpc, just a queue count is needed. Otherwise, if the
1860 first letter after p is r, then order is random. */
1861
1862 else if (*argrest == 'p')
1863 {
1864 if (*(++argrest) == 'c')
1865 {
1866 count_queue = TRUE;
1867 if (*(++argrest) != 0) badarg = TRUE;
1868 break;
1869 }
1870
1871 if (*argrest == 'r')
1872 {
1873 list_queue_option = 8;
1874 argrest++;
1875 }
1876 else list_queue_option = 0;
1877
1878 list_queue = TRUE;
1879
1880 /* -bp: List the contents of the mail queue, top-level only */
1881
1882 if (*argrest == 0) {}
1883
1884 /* -bpu: List the contents of the mail queue, top-level undelivered */
1885
1886 else if (Ustrcmp(argrest, "u") == 0) list_queue_option += 1;
1887
1888 /* -bpa: List the contents of the mail queue, including all delivered */
1889
1890 else if (Ustrcmp(argrest, "a") == 0) list_queue_option += 2;
1891
1892 /* Unknown after -bp[r] */
1893
1894 else
1895 {
1896 badarg = TRUE;
1897 break;
1898 }
1899 }
1900
1901
1902 /* -bP: List the configuration variables given as the address list.
1903 Force -v, so configuration errors get displayed. */
1904
1905 else if (Ustrcmp(argrest, "P") == 0)
1906 {
1907 list_options = TRUE;
1908 debug_selector |= D_v;
1909 debug_file = stderr;
1910 }
1911
1912 /* -brt: Test retry configuration lookup */
1913
1914 else if (Ustrcmp(argrest, "rt") == 0)
1915 {
1916 test_retry_arg = i + 1;
1917 goto END_ARG;
1918 }
1919
1920 /* -brw: Test rewrite configuration */
1921
1922 else if (Ustrcmp(argrest, "rw") == 0)
1923 {
1924 test_rewrite_arg = i + 1;
1925 goto END_ARG;
1926 }
1927
1928 /* -bS: Read SMTP commands on standard input, but produce no replies -
1929 all errors are reported by sending messages. */
1930
1931 else if (Ustrcmp(argrest, "S") == 0)
1932 smtp_input = smtp_batched_input = receiving_message = TRUE;
1933
1934 /* -bs: Read SMTP commands on standard input and produce SMTP replies
1935 on standard output. */
1936
1937 else if (Ustrcmp(argrest, "s") == 0) smtp_input = receiving_message = TRUE;
1938
1939 /* -bt: address testing mode */
1940
1941 else if (Ustrcmp(argrest, "t") == 0)
1942 address_test_mode = checking = log_testing_mode = TRUE;
1943
1944 /* -bv: verify addresses */
1945
1946 else if (Ustrcmp(argrest, "v") == 0)
1947 verify_address_mode = checking = log_testing_mode = TRUE;
1948
1949 /* -bvs: verify sender addresses */
1950
1951 else if (Ustrcmp(argrest, "vs") == 0)
1952 {
1953 verify_address_mode = checking = log_testing_mode = TRUE;
1954 verify_as_sender = TRUE;
1955 }
1956
1957 /* -bV: Print version string and support details */
1958
1959 else if (Ustrcmp(argrest, "V") == 0)
1960 {
1961 printf("Exim version %s #%s built %s\n", version_string,
1962 version_cnumber, version_date);
1963 printf("%s\n", CS version_copyright);
1964 version_printed = TRUE;
1965 show_whats_supported(stdout);
1966 }
1967
1968 else badarg = TRUE;
1969 break;
1970
1971
1972 /* -C: change configuration file list; ignore if it isn't really
1973 a change! Enforce a prefix check if required. */
1974
1975 case 'C':
1976 if (*argrest == 0)
1977 {
1978 if(++i < argc) argrest = argv[i]; else
1979 { badarg = TRUE; break; }
1980 }
1981 if (Ustrcmp(config_main_filelist, argrest) != 0)
1982 {
1983 #ifdef ALT_CONFIG_PREFIX
1984 int sep = 0;
1985 int len = Ustrlen(ALT_CONFIG_PREFIX);
1986 uschar *list = argrest;
1987 uschar *filename;
1988 while((filename = string_nextinlist(&list, &sep, big_buffer,
1989 big_buffer_size)) != NULL)
1990 {
1991 if ((Ustrlen(filename) < len ||
1992 Ustrncmp(filename, ALT_CONFIG_PREFIX, len) != 0 ||
1993 Ustrstr(filename, "/../") != NULL) &&
1994 (Ustrcmp(filename, "/dev/null") != 0 || real_uid != root_uid))
1995 {
1996 fprintf(stderr, "-C Permission denied\n");
1997 exit(EXIT_FAILURE);
1998 }
1999 }
2000 #endif
2001 if (real_uid != root_uid)
2002 {
2003 #ifdef TRUSTED_CONFIG_LIST
2004
2005 if (real_uid != exim_uid
2006 #ifdef CONFIGURE_OWNER
2007 && real_uid != config_uid
2008 #endif
2009 )
2010 trusted_config = FALSE;
2011 else
2012 {
2013 FILE *trust_list = Ufopen(TRUSTED_CONFIG_LIST, "rb");
2014 if (trust_list)
2015 {
2016 struct stat statbuf;
2017
2018 if (fstat(fileno(trust_list), &statbuf) != 0 ||
2019 (statbuf.st_uid != root_uid /* owner not root */
2020 #ifdef CONFIGURE_OWNER
2021 && statbuf.st_uid != config_uid /* owner not the special one */
2022 #endif
2023 ) || /* or */
2024 (statbuf.st_gid != root_gid /* group not root */
2025 #ifdef CONFIGURE_GROUP
2026 && statbuf.st_gid != config_gid /* group not the special one */
2027 #endif
2028 && (statbuf.st_mode & 020) != 0 /* group writeable */
2029 ) || /* or */
2030 (statbuf.st_mode & 2) != 0) /* world writeable */
2031 {
2032 trusted_config = FALSE;
2033 fclose(trust_list);
2034 }
2035 else
2036 {
2037 /* Well, the trust list at least is up to scratch... */
2038 void *reset_point = store_get(0);
2039 uschar *trusted_configs[32];
2040 int nr_configs = 0;
2041 int i = 0;
2042
2043 while (Ufgets(big_buffer, big_buffer_size, trust_list))
2044 {
2045 uschar *start = big_buffer, *nl;
2046 while (*start && isspace(*start))
2047 start++;
2048 if (*start != '/')
2049 continue;
2050 nl = Ustrchr(start, '\n');
2051 if (nl)
2052 *nl = 0;
2053 trusted_configs[nr_configs++] = string_copy(start);
2054 if (nr_configs == 32)
2055 break;
2056 }
2057 fclose(trust_list);
2058
2059 if (nr_configs)
2060 {
2061 int sep = 0;
2062 uschar *list = argrest;
2063 uschar *filename;
2064 while (trusted_config && (filename = string_nextinlist(&list,
2065 &sep, big_buffer, big_buffer_size)) != NULL)
2066 {
2067 for (i=0; i < nr_configs; i++)
2068 {
2069 if (Ustrcmp(filename, trusted_configs[i]) == 0)
2070 break;
2071 }
2072 if (i == nr_configs)
2073 {
2074 trusted_config = FALSE;
2075 break;
2076 }
2077 }
2078 store_reset(reset_point);
2079 }
2080 else
2081 {
2082 /* No valid prefixes found in trust_list file. */
2083 trusted_config = FALSE;
2084 }
2085 }
2086 }
2087 else
2088 {
2089 /* Could not open trust_list file. */
2090 trusted_config = FALSE;
2091 }
2092 }
2093 #else
2094 /* Not root; don't trust config */
2095 trusted_config = FALSE;
2096 #endif
2097 }
2098
2099 config_main_filelist = argrest;
2100 config_changed = TRUE;
2101 }
2102 break;
2103
2104
2105 /* -D: set up a macro definition */
2106
2107 case 'D':
2108 #ifdef DISABLE_D_OPTION
2109 fprintf(stderr, "exim: -D is not available in this Exim binary\n");
2110 exit(EXIT_FAILURE);
2111 #else
2112 {
2113 int ptr = 0;
2114 macro_item *mlast = NULL;
2115 macro_item *m;
2116 uschar name[24];
2117 uschar *s = argrest;
2118
2119 while (isspace(*s)) s++;
2120
2121 if (*s < 'A' || *s > 'Z')
2122 {
2123 fprintf(stderr, "exim: macro name set by -D must start with "
2124 "an upper case letter\n");
2125 exit(EXIT_FAILURE);
2126 }
2127
2128 while (isalnum(*s) || *s == '_')
2129 {
2130 if (ptr < sizeof(name)-1) name[ptr++] = *s;
2131 s++;
2132 }
2133 name[ptr] = 0;
2134 if (ptr == 0) { badarg = TRUE; break; }
2135 while (isspace(*s)) s++;
2136 if (*s != 0)
2137 {
2138 if (*s++ != '=') { badarg = TRUE; break; }
2139 while (isspace(*s)) s++;
2140 }
2141
2142 for (m = macros; m != NULL; m = m->next)
2143 {
2144 if (Ustrcmp(m->name, name) == 0)
2145 {
2146 fprintf(stderr, "exim: duplicated -D in command line\n");
2147 exit(EXIT_FAILURE);
2148 }
2149 mlast = m;
2150 }
2151
2152 m = store_get(sizeof(macro_item) + Ustrlen(name));
2153 m->next = NULL;
2154 m->command_line = TRUE;
2155 if (mlast == NULL) macros = m; else mlast->next = m;
2156 Ustrcpy(m->name, name);
2157 m->replacement = string_copy(s);
2158
2159 if (clmacro_count >= MAX_CLMACROS)
2160 {
2161 fprintf(stderr, "exim: too many -D options on command line\n");
2162 exit(EXIT_FAILURE);
2163 }
2164 clmacros[clmacro_count++] = string_sprintf("-D%s=%s", m->name,
2165 m->replacement);
2166 }
2167 #endif
2168 break;
2169
2170 /* -d: Set debug level (see also -v below) or set the drop_cr option.
2171 The latter is now a no-op, retained for compatibility only. If -dd is used,
2172 debugging subprocesses of the daemon is disabled. */
2173
2174 case 'd':
2175 if (Ustrcmp(argrest, "ropcr") == 0)
2176 {
2177 /* drop_cr = TRUE; */
2178 }
2179
2180 /* Use an intermediate variable so that we don't set debugging while
2181 decoding the debugging bits. */
2182
2183 else
2184 {
2185 unsigned int selector = D_default;
2186 debug_selector = 0;
2187 debug_file = NULL;
2188 if (*argrest == 'd')
2189 {
2190 debug_daemon = TRUE;
2191 argrest++;
2192 }
2193 if (*argrest != 0)
2194 decode_bits(&selector, NULL, D_memory, 0, argrest, debug_options,
2195 debug_options_count, US"debug", 0);
2196 debug_selector = selector;
2197 }
2198 break;
2199
2200
2201 /* -E: This is a local error message. This option is not intended for
2202 external use at all, but is not restricted to trusted callers because it
2203 does no harm (just suppresses certain error messages) and if Exim is run
2204 not setuid root it won't always be trusted when it generates error
2205 messages using this option. If there is a message id following -E, point
2206 message_reference at it, for logging. */
2207
2208 case 'E':
2209 local_error_message = TRUE;
2210 if (mac_ismsgid(argrest)) message_reference = argrest;
2211 break;
2212
2213
2214 /* -ex: The vacation program calls sendmail with the undocumented "-eq"
2215 option, so it looks as if historically the -oex options are also callable
2216 without the leading -o. So we have to accept them. Before the switch,
2217 anything starting -oe has been converted to -e. Exim does not support all
2218 of the sendmail error options. */
2219
2220 case 'e':
2221 if (Ustrcmp(argrest, "e") == 0)
2222 {
2223 arg_error_handling = ERRORS_SENDER;
2224 errors_sender_rc = EXIT_SUCCESS;
2225 }
2226 else if (Ustrcmp(argrest, "m") == 0) arg_error_handling = ERRORS_SENDER;
2227 else if (Ustrcmp(argrest, "p") == 0) arg_error_handling = ERRORS_STDERR;
2228 else if (Ustrcmp(argrest, "q") == 0) arg_error_handling = ERRORS_STDERR;
2229 else if (Ustrcmp(argrest, "w") == 0) arg_error_handling = ERRORS_SENDER;
2230 else badarg = TRUE;
2231 break;
2232
2233
2234 /* -F: Set sender's full name, used instead of the gecos entry from
2235 the password file. Since users can usually alter their gecos entries,
2236 there's no security involved in using this instead. The data can follow
2237 the -F or be in the next argument. */
2238
2239 case 'F':
2240 if (*argrest == 0)
2241 {
2242 if(++i < argc) argrest = argv[i]; else
2243 { badarg = TRUE; break; }
2244 }
2245 originator_name = argrest;
2246 sender_name_forced = TRUE;
2247 break;
2248
2249
2250 /* -f: Set sender's address - this value is only actually used if Exim is
2251 run by a trusted user, or if untrusted_set_sender is set and matches the
2252 address, except that the null address can always be set by any user. The
2253 test for this happens later, when the value given here is ignored when not
2254 permitted. For an untrusted user, the actual sender is still put in Sender:
2255 if it doesn't match the From: header (unless no_local_from_check is set).
2256 The data can follow the -f or be in the next argument. The -r switch is an
2257 obsolete form of -f but since there appear to be programs out there that
2258 use anything that sendmail has ever supported, better accept it - the
2259 synonymizing is done before the switch above.
2260
2261 At this stage, we must allow domain literal addresses, because we don't
2262 know what the setting of allow_domain_literals is yet. Ditto for trailing
2263 dots and strip_trailing_dot. */
2264
2265 case 'f':
2266 {
2267 int start, end;
2268 uschar *errmess;
2269 if (*argrest == 0)
2270 {
2271 if (i+1 < argc) argrest = argv[++i]; else
2272 { badarg = TRUE; break; }
2273 }
2274 if (*argrest == 0)
2275 {
2276 sender_address = string_sprintf(""); /* Ensure writeable memory */
2277 }
2278 else
2279 {
2280 uschar *temp = argrest + Ustrlen(argrest) - 1;
2281 while (temp >= argrest && isspace(*temp)) temp--;
2282 if (temp >= argrest && *temp == '.') f_end_dot = TRUE;
2283 allow_domain_literals = TRUE;
2284 strip_trailing_dot = TRUE;
2285 sender_address = parse_extract_address(argrest, &errmess, &start, &end,
2286 &sender_address_domain, TRUE);
2287 allow_domain_literals = FALSE;
2288 strip_trailing_dot = FALSE;
2289 if (sender_address == NULL)
2290 {
2291 fprintf(stderr, "exim: bad -f address \"%s\": %s\n", argrest, errmess);
2292 return EXIT_FAILURE;
2293 }
2294 }
2295 sender_address_forced = TRUE;
2296 }
2297 break;
2298
2299 /* This is some Sendmail thing which can be ignored */
2300
2301 case 'G':
2302 break;
2303
2304 /* -h: Set the hop count for an incoming message. Exim does not currently
2305 support this; it always computes it by counting the Received: headers.
2306 To put it in will require a change to the spool header file format. */
2307
2308 case 'h':
2309 if (*argrest == 0)
2310 {
2311 if(++i < argc) argrest = argv[i]; else
2312 { badarg = TRUE; break; }
2313 }
2314 if (!isdigit(*argrest)) badarg = TRUE;
2315 break;
2316
2317
2318 /* -i: Set flag so dot doesn't end non-SMTP input (same as -oi, seems
2319 not to be documented for sendmail but mailx (at least) uses it) */
2320
2321 case 'i':
2322 if (*argrest == 0) dot_ends = FALSE; else badarg = TRUE;
2323 break;
2324
2325
2326 case 'M':
2327 receiving_message = FALSE;
2328
2329 /* -MC: continue delivery of another message via an existing open
2330 file descriptor. This option is used for an internal call by the
2331 smtp transport when there is a pending message waiting to go to an
2332 address to which it has got a connection. Five subsequent arguments are
2333 required: transport name, host name, IP address, sequence number, and
2334 message_id. Transports may decline to create new processes if the sequence
2335 number gets too big. The channel is stdin. This (-MC) must be the last
2336 argument. There's a subsequent check that the real-uid is privileged.
2337
2338 If we are running in the test harness. delay for a bit, to let the process
2339 that set this one up complete. This makes for repeatability of the logging,
2340 etc. output. */
2341
2342 if (Ustrcmp(argrest, "C") == 0)
2343 {
2344 union sockaddr_46 interface_sock;
2345 EXIM_SOCKLEN_T size = sizeof(interface_sock);
2346
2347 if (argc != i + 6)
2348 {
2349 fprintf(stderr, "exim: too many or too few arguments after -MC\n");
2350 return EXIT_FAILURE;
2351 }
2352
2353 if (msg_action_arg >= 0)
2354 {
2355 fprintf(stderr, "exim: incompatible arguments\n");
2356 return EXIT_FAILURE;
2357 }
2358
2359 continue_transport = argv[++i];
2360 continue_hostname = argv[++i];
2361 continue_host_address = argv[++i];
2362 continue_sequence = Uatoi(argv[++i]);
2363 msg_action = MSG_DELIVER;
2364 msg_action_arg = ++i;
2365 forced_delivery = TRUE;
2366 queue_run_pid = passed_qr_pid;
2367 queue_run_pipe = passed_qr_pipe;
2368
2369 if (!mac_ismsgid(argv[i]))
2370 {
2371 fprintf(stderr, "exim: malformed message id %s after -MC option\n",
2372 argv[i]);
2373 return EXIT_FAILURE;
2374 }
2375
2376 /* Set up $sending_ip_address and $sending_port */
2377
2378 if (getsockname(fileno(stdin), (struct sockaddr *)(&interface_sock),
2379 &size) == 0)
2380 sending_ip_address = host_ntoa(-1, &interface_sock, NULL,
2381 &sending_port);
2382 else
2383 {
2384 fprintf(stderr, "exim: getsockname() failed after -MC option: %s\n",
2385 strerror(errno));
2386 return EXIT_FAILURE;
2387 }
2388
2389 if (running_in_test_harness) millisleep(500);
2390 break;
2391 }
2392
2393 /* -MCA: set the smtp_authenticated flag; this is useful only when it
2394 precedes -MC (see above). The flag indicates that the host to which
2395 Exim is connected has accepted an AUTH sequence. */
2396
2397 else if (Ustrcmp(argrest, "CA") == 0)
2398 {
2399 smtp_authenticated = TRUE;
2400 break;
2401 }
2402
2403 /* -MCP: set the smtp_use_pipelining flag; this is useful only when
2404 it preceded -MC (see above) */
2405
2406 else if (Ustrcmp(argrest, "CP") == 0)
2407 {
2408 smtp_use_pipelining = TRUE;
2409 break;
2410 }
2411
2412 /* -MCQ: pass on the pid of the queue-running process that started
2413 this chain of deliveries and the fd of its synchronizing pipe; this
2414 is useful only when it precedes -MC (see above) */
2415
2416 else if (Ustrcmp(argrest, "CQ") == 0)
2417 {
2418 if(++i < argc) passed_qr_pid = (pid_t)(Uatol(argv[i]));
2419 else badarg = TRUE;
2420 if(++i < argc) passed_qr_pipe = (int)(Uatol(argv[i]));
2421 else badarg = TRUE;
2422 break;
2423 }
2424
2425 /* -MCS: set the smtp_use_size flag; this is useful only when it
2426 precedes -MC (see above) */
2427
2428 else if (Ustrcmp(argrest, "CS") == 0)
2429 {
2430 smtp_use_size = TRUE;
2431 break;
2432 }
2433
2434 /* -MCT: set the tls_offered flag; this is useful only when it
2435 precedes -MC (see above). The flag indicates that the host to which
2436 Exim is connected has offered TLS support. */
2437
2438 #ifdef SUPPORT_TLS
2439 else if (Ustrcmp(argrest, "CT") == 0)
2440 {
2441 tls_offered = TRUE;
2442 break;
2443 }
2444 #endif
2445
2446 /* -M[x]: various operations on the following list of message ids:
2447 -M deliver the messages, ignoring next retry times and thawing
2448 -Mc deliver the messages, checking next retry times, no thawing
2449 -Mf freeze the messages
2450 -Mg give up on the messages
2451 -Mt thaw the messages
2452 -Mrm remove the messages
2453 In the above cases, this must be the last option. There are also the
2454 following options which are followed by a single message id, and which
2455 act on that message. Some of them use the "recipient" addresses as well.
2456 -Mar add recipient(s)
2457 -Mmad mark all recipients delivered
2458 -Mmd mark recipients(s) delivered
2459 -Mes edit sender
2460 -Mset load a message for use with -be
2461 -Mvb show body
2462 -Mvc show copy (of whole message, in RFC 2822 format)
2463 -Mvh show header
2464 -Mvl show log
2465 */
2466
2467 else if (*argrest == 0)
2468 {
2469 msg_action = MSG_DELIVER;
2470 forced_delivery = deliver_force_thaw = TRUE;
2471 }
2472 else if (Ustrcmp(argrest, "ar") == 0)
2473 {
2474 msg_action = MSG_ADD_RECIPIENT;
2475 one_msg_action = TRUE;
2476 }
2477 else if (Ustrcmp(argrest, "c") == 0) msg_action = MSG_DELIVER;
2478 else if (Ustrcmp(argrest, "es") == 0)
2479 {
2480 msg_action = MSG_EDIT_SENDER;
2481 one_msg_action = TRUE;
2482 }
2483 else if (Ustrcmp(argrest, "f") == 0) msg_action = MSG_FREEZE;
2484 else if (Ustrcmp(argrest, "g") == 0)
2485 {
2486 msg_action = MSG_DELIVER;
2487 deliver_give_up = TRUE;
2488 }
2489 else if (Ustrcmp(argrest, "mad") == 0)
2490 {
2491 msg_action = MSG_MARK_ALL_DELIVERED;
2492 }
2493 else if (Ustrcmp(argrest, "md") == 0)
2494 {
2495 msg_action = MSG_MARK_DELIVERED;
2496 one_msg_action = TRUE;
2497 }
2498 else if (Ustrcmp(argrest, "rm") == 0) msg_action = MSG_REMOVE;
2499 else if (Ustrcmp(argrest, "set") == 0)
2500 {
2501 msg_action = MSG_LOAD;
2502 one_msg_action = TRUE;
2503 }
2504 else if (Ustrcmp(argrest, "t") == 0) msg_action = MSG_THAW;
2505 else if (Ustrcmp(argrest, "vb") == 0)
2506 {
2507 msg_action = MSG_SHOW_BODY;
2508 one_msg_action = TRUE;
2509 }
2510 else if (Ustrcmp(argrest, "vc") == 0)
2511 {
2512 msg_action = MSG_SHOW_COPY;
2513 one_msg_action = TRUE;
2514 }
2515 else if (Ustrcmp(argrest, "vh") == 0)
2516 {
2517 msg_action = MSG_SHOW_HEADER;
2518 one_msg_action = TRUE;
2519 }
2520 else if (Ustrcmp(argrest, "vl") == 0)
2521 {
2522 msg_action = MSG_SHOW_LOG;
2523 one_msg_action = TRUE;
2524 }
2525 else { badarg = TRUE; break; }
2526
2527 /* All the -Mxx options require at least one message id. */
2528
2529 msg_action_arg = i + 1;
2530 if (msg_action_arg >= argc)
2531 {
2532 fprintf(stderr, "exim: no message ids given after %s option\n", arg);
2533 return EXIT_FAILURE;
2534 }
2535
2536 /* Some require only message ids to follow */
2537
2538 if (!one_msg_action)
2539 {
2540 int j;
2541 for (j = msg_action_arg; j < argc; j++) if (!mac_ismsgid(argv[j]))
2542 {
2543 fprintf(stderr, "exim: malformed message id %s after %s option\n",
2544 argv[j], arg);
2545 return EXIT_FAILURE;
2546 }
2547 goto END_ARG; /* Remaining args are ids */
2548 }
2549
2550 /* Others require only one message id, possibly followed by addresses,
2551 which will be handled as normal arguments. */
2552
2553 else
2554 {
2555 if (!mac_ismsgid(argv[msg_action_arg]))
2556 {
2557 fprintf(stderr, "exim: malformed message id %s after %s option\n",
2558 argv[msg_action_arg], arg);
2559 return EXIT_FAILURE;
2560 }
2561 i++;
2562 }
2563 break;
2564
2565
2566 /* Some programs seem to call the -om option without the leading o;
2567 for sendmail it askes for "me too". Exim always does this. */
2568
2569 case 'm':
2570 if (*argrest != 0) badarg = TRUE;
2571 break;
2572
2573
2574 /* -N: don't do delivery - a debugging option that stops transports doing
2575 their thing. It implies debugging at the D_v level. */
2576
2577 case 'N':
2578 if (*argrest == 0)
2579 {
2580 dont_deliver = TRUE;
2581 debug_selector |= D_v;
2582 debug_file = stderr;
2583 }
2584 else badarg = TRUE;
2585 break;
2586
2587
2588 /* -n: This means "don't alias" in sendmail, apparently. Just ignore
2589 it. */
2590
2591 case 'n':
2592 break;
2593
2594 /* -O: Just ignore it. In sendmail, apparently -O option=value means set
2595 option to the specified value. This form uses long names. We need to handle
2596 -O option=value and -Ooption=value. */
2597
2598 case 'O':
2599 if (*argrest == 0)
2600 {
2601 if (++i >= argc)
2602 {
2603 fprintf(stderr, "exim: string expected after -O\n");
2604 exit(EXIT_FAILURE);
2605 }
2606 }
2607 break;
2608
2609 case 'o':
2610
2611 /* -oA: Set an argument for the bi command (sendmail's "alternate alias
2612 file" option). */
2613
2614 if (*argrest == 'A')
2615 {
2616 alias_arg = argrest + 1;
2617 if (alias_arg[0] == 0)
2618 {
2619 if (i+1 < argc) alias_arg = argv[++i]; else
2620 {
2621 fprintf(stderr, "exim: string expected after -oA\n");
2622 exit(EXIT_FAILURE);
2623 }
2624 }
2625 }
2626
2627 /* -oB: Set a connection message max value for remote deliveries */
2628
2629 else if (*argrest == 'B')
2630 {
2631 uschar *p = argrest + 1;
2632 if (p[0] == 0)
2633 {
2634 if (i+1 < argc && isdigit((argv[i+1][0]))) p = argv[++i]; else
2635 {
2636 connection_max_messages = 1;
2637 p = NULL;
2638 }
2639 }
2640
2641 if (p != NULL)
2642 {
2643 if (!isdigit(*p))
2644 {
2645 fprintf(stderr, "exim: number expected after -oB\n");
2646 exit(EXIT_FAILURE);
2647 }
2648 connection_max_messages = Uatoi(p);
2649 }
2650 }
2651
2652 /* -odb: background delivery */
2653
2654 else if (Ustrcmp(argrest, "db") == 0)
2655 {
2656 synchronous_delivery = FALSE;
2657 arg_queue_only = FALSE;
2658 queue_only_set = TRUE;
2659 }
2660
2661 /* -odf: foreground delivery (smail-compatible option); same effect as
2662 -odi: interactive (synchronous) delivery (sendmail-compatible option)
2663 */
2664
2665 else if (Ustrcmp(argrest, "df") == 0 || Ustrcmp(argrest, "di") == 0)
2666 {
2667 synchronous_delivery = TRUE;
2668 arg_queue_only = FALSE;
2669 queue_only_set = TRUE;
2670 }
2671
2672 /* -odq: queue only */
2673
2674 else if (Ustrcmp(argrest, "dq") == 0)
2675 {
2676 synchronous_delivery = FALSE;
2677 arg_queue_only = TRUE;
2678 queue_only_set = TRUE;
2679 }
2680
2681 /* -odqs: queue SMTP only - do local deliveries and remote routing,
2682 but no remote delivery */
2683
2684 else if (Ustrcmp(argrest, "dqs") == 0)
2685 {
2686 queue_smtp = TRUE;
2687 arg_queue_only = FALSE;
2688 queue_only_set = TRUE;
2689 }
2690
2691 /* -oex: Sendmail error flags. As these are also accepted without the
2692 leading -o prefix, for compatibility with vacation and other callers,
2693 they are handled with -e above. */
2694
2695 /* -oi: Set flag so dot doesn't end non-SMTP input (same as -i)
2696 -oitrue: Another sendmail syntax for the same */
2697
2698 else if (Ustrcmp(argrest, "i") == 0 ||
2699 Ustrcmp(argrest, "itrue") == 0)
2700 dot_ends = FALSE;
2701
2702 /* -oM*: Set various characteristics for an incoming message; actually
2703 acted on for trusted callers only. */
2704
2705 else if (*argrest == 'M')
2706 {
2707 if (i+1 >= argc)
2708 {
2709 fprintf(stderr, "exim: data expected after -o%s\n", argrest);
2710 exit(EXIT_FAILURE);
2711 }
2712
2713 /* -oMa: Set sender host address */
2714
2715 if (Ustrcmp(argrest, "Ma") == 0) sender_host_address = argv[++i];
2716
2717 /* -oMaa: Set authenticator name */
2718
2719 else if (Ustrcmp(argrest, "Maa") == 0)
2720 sender_host_authenticated = argv[++i];
2721
2722 /* -oMas: setting authenticated sender */
2723
2724 else if (Ustrcmp(argrest, "Mas") == 0) authenticated_sender = argv[++i];
2725
2726 /* -oMai: setting authenticated id */
2727
2728 else if (Ustrcmp(argrest, "Mai") == 0) authenticated_id = argv[++i];
2729
2730 /* -oMi: Set incoming interface address */
2731
2732 else if (Ustrcmp(argrest, "Mi") == 0) interface_address = argv[++i];
2733
2734 /* -oMr: Received protocol */
2735
2736 else if (Ustrcmp(argrest, "Mr") == 0) received_protocol = argv[++i];
2737
2738 /* -oMs: Set sender host name */
2739
2740 else if (Ustrcmp(argrest, "Ms") == 0) sender_host_name = argv[++i];
2741
2742 /* -oMt: Set sender ident */
2743
2744 else if (Ustrcmp(argrest, "Mt") == 0)
2745 {
2746 sender_ident_set = TRUE;
2747 sender_ident = argv[++i];
2748 }
2749
2750 /* Else a bad argument */
2751
2752 else
2753 {
2754 badarg = TRUE;
2755 break;
2756 }
2757 }
2758
2759 /* -om: Me-too flag for aliases. Exim always does this. Some programs
2760 seem to call this as -m (undocumented), so that is also accepted (see
2761 above). */
2762
2763 else if (Ustrcmp(argrest, "m") == 0) {}
2764
2765 /* -oo: An ancient flag for old-style addresses which still seems to
2766 crop up in some calls (see in SCO). */
2767
2768 else if (Ustrcmp(argrest, "o") == 0) {}
2769
2770 /* -oP <name>: set pid file path for daemon */
2771
2772 else if (Ustrcmp(argrest, "P") == 0)
2773 override_pid_file_path = argv[++i];
2774
2775 /* -or <n>: set timeout for non-SMTP acceptance
2776 -os <n>: set timeout for SMTP acceptance */
2777
2778 else if (*argrest == 'r' || *argrest == 's')
2779 {
2780 int *tp = (*argrest == 'r')?
2781 &arg_receive_timeout : &arg_smtp_receive_timeout;
2782 if (argrest[1] == 0)
2783 {
2784 if (i+1 < argc) *tp= readconf_readtime(argv[++i], 0, FALSE);
2785 }
2786 else *tp = readconf_readtime(argrest + 1, 0, FALSE);
2787 if (*tp < 0)
2788 {
2789 fprintf(stderr, "exim: bad time value %s: abandoned\n", argv[i]);
2790 exit(EXIT_FAILURE);
2791 }
2792 }
2793
2794 /* -oX <list>: Override local_interfaces and/or default daemon ports */
2795
2796 else if (Ustrcmp(argrest, "X") == 0)
2797 override_local_interfaces = argv[++i];
2798
2799 /* Unknown -o argument */
2800
2801 else badarg = TRUE;
2802 break;
2803
2804
2805 /* -ps: force Perl startup; -pd force delayed Perl startup */
2806
2807 case 'p':
2808 #ifdef EXIM_PERL
2809 if (*argrest == 's' && argrest[1] == 0)
2810 {
2811 perl_start_option = 1;
2812 break;
2813 }
2814 if (*argrest == 'd' && argrest[1] == 0)
2815 {
2816 perl_start_option = -1;
2817 break;
2818 }
2819 #endif
2820
2821 /* -panythingelse is taken as the Sendmail-compatible argument -prval:sval,
2822 which sets the host protocol and host name */
2823
2824 if (*argrest == 0)
2825 {
2826 if (i+1 < argc) argrest = argv[++i]; else
2827 { badarg = TRUE; break; }
2828 }
2829
2830 if (*argrest != 0)
2831 {
2832 uschar *hn = Ustrchr(argrest, ':');
2833 if (hn == NULL)
2834 {
2835 received_protocol = argrest;
2836 }
2837 else
2838 {
2839 received_protocol = string_copyn(argrest, hn - argrest);
2840 sender_host_name = hn + 1;
2841 }
2842 }
2843 break;
2844
2845
2846 case 'q':
2847 receiving_message = FALSE;
2848 if (queue_interval >= 0)
2849 {
2850 fprintf(stderr, "exim: -q specified more than once\n");
2851 exit(EXIT_FAILURE);
2852 }
2853
2854 /* -qq...: Do queue runs in a 2-stage manner */
2855
2856 if (*argrest == 'q')
2857 {
2858 queue_2stage = TRUE;
2859 argrest++;
2860 }
2861
2862 /* -qi...: Do only first (initial) deliveries */
2863
2864 if (*argrest == 'i')
2865 {
2866 queue_run_first_delivery = TRUE;
2867 argrest++;
2868 }
2869
2870 /* -qf...: Run the queue, forcing deliveries
2871 -qff..: Ditto, forcing thawing as well */
2872
2873 if (*argrest == 'f')
2874 {
2875 queue_run_force = TRUE;
2876 if (*(++argrest) == 'f')
2877 {
2878 deliver_force_thaw = TRUE;
2879 argrest++;
2880 }
2881 }
2882
2883 /* -q[f][f]l...: Run the queue only on local deliveries */
2884
2885 if (*argrest == 'l')
2886 {
2887 queue_run_local = TRUE;
2888 argrest++;
2889 }
2890
2891 /* -q[f][f][l]: Run the queue, optionally forced, optionally local only,
2892 optionally starting from a given message id. */
2893
2894 if (*argrest == 0 &&
2895 (i + 1 >= argc || argv[i+1][0] == '-' || mac_ismsgid(argv[i+1])))
2896 {
2897 queue_interval = 0;
2898 if (i+1 < argc && mac_ismsgid(argv[i+1]))
2899 start_queue_run_id = argv[++i];
2900 if (i+1 < argc && mac_ismsgid(argv[i+1]))
2901 stop_queue_run_id = argv[++i];
2902 }
2903
2904 /* -q[f][f][l]<n>: Run the queue at regular intervals, optionally forced,
2905 optionally local only. */
2906
2907 else
2908 {
2909 if (*argrest != 0)
2910 queue_interval = readconf_readtime(argrest, 0, FALSE);
2911 else
2912 queue_interval = readconf_readtime(argv[++i], 0, FALSE);
2913 if (queue_interval <= 0)
2914 {
2915 fprintf(stderr, "exim: bad time value %s: abandoned\n", argv[i]);
2916 exit(EXIT_FAILURE);
2917 }
2918 }
2919 break;
2920
2921
2922 case 'R': /* Synonymous with -qR... */
2923 receiving_message = FALSE;
2924
2925 /* -Rf: As -R (below) but force all deliveries,
2926 -Rff: Ditto, but also thaw all frozen messages,
2927 -Rr: String is regex
2928 -Rrf: Regex and force
2929 -Rrff: Regex and force and thaw
2930
2931 in all cases provided there are no further characters in this
2932 argument. */
2933
2934 if (*argrest != 0)
2935 {
2936 int i;
2937 for (i = 0; i < sizeof(rsopts)/sizeof(uschar *); i++)
2938 {
2939 if (Ustrcmp(argrest, rsopts[i]) == 0)
2940 {
2941 if (i != 2) queue_run_force = TRUE;
2942 if (i >= 2) deliver_selectstring_regex = TRUE;
2943 if (i == 1 || i == 4) deliver_force_thaw = TRUE;
2944 argrest += Ustrlen(rsopts[i]);
2945 }
2946 }
2947 }
2948
2949 /* -R: Set string to match in addresses for forced queue run to
2950 pick out particular messages. */
2951
2952 if (*argrest == 0)
2953 {
2954 if (i+1 < argc) deliver_selectstring = argv[++i]; else
2955 {
2956 fprintf(stderr, "exim: string expected after -R\n");
2957 exit(EXIT_FAILURE);
2958 }
2959 }
2960 else deliver_selectstring = argrest;
2961 break;
2962
2963
2964 /* -r: an obsolete synonym for -f (see above) */
2965
2966
2967 /* -S: Like -R but works on sender. */
2968
2969 case 'S': /* Synonymous with -qS... */
2970 receiving_message = FALSE;
2971
2972 /* -Sf: As -S (below) but force all deliveries,
2973 -Sff: Ditto, but also thaw all frozen messages,
2974 -Sr: String is regex
2975 -Srf: Regex and force
2976 -Srff: Regex and force and thaw
2977
2978 in all cases provided there are no further characters in this
2979 argument. */
2980
2981 if (*argrest != 0)
2982 {
2983 int i;
2984 for (i = 0; i < sizeof(rsopts)/sizeof(uschar *); i++)
2985 {
2986 if (Ustrcmp(argrest, rsopts[i]) == 0)
2987 {
2988 if (i != 2) queue_run_force = TRUE;
2989 if (i >= 2) deliver_selectstring_sender_regex = TRUE;
2990 if (i == 1 || i == 4) deliver_force_thaw = TRUE;
2991 argrest += Ustrlen(rsopts[i]);
2992 }
2993 }
2994 }
2995
2996 /* -S: Set string to match in addresses for forced queue run to
2997 pick out particular messages. */
2998
2999 if (*argrest == 0)
3000 {
3001 if (i+1 < argc) deliver_selectstring_sender = argv[++i]; else
3002 {
3003 fprintf(stderr, "exim: string expected after -S\n");
3004 exit(EXIT_FAILURE);
3005 }
3006 }
3007 else deliver_selectstring_sender = argrest;
3008 break;
3009
3010 /* -Tqt is an option that is exclusively for use by the testing suite.
3011 It is not recognized in other circumstances. It allows for the setting up
3012 of explicit "queue times" so that various warning/retry things can be
3013 tested. Otherwise variability of clock ticks etc. cause problems. */
3014
3015 case 'T':
3016 if (running_in_test_harness && Ustrcmp(argrest, "qt") == 0)
3017 fudged_queue_times = argv[++i];
3018 else badarg = TRUE;
3019 break;
3020
3021
3022 /* -t: Set flag to extract recipients from body of message. */
3023
3024 case 't':
3025 if (*argrest == 0) extract_recipients = TRUE;
3026
3027 /* -ti: Set flag to extract recipients from body of message, and also
3028 specify that dot does not end the message. */
3029
3030 else if (Ustrcmp(argrest, "i") == 0)
3031 {
3032 extract_recipients = TRUE;
3033 dot_ends = FALSE;
3034 }
3035
3036 /* -tls-on-connect: don't wait for STARTTLS (for old clients) */
3037
3038 #ifdef SUPPORT_TLS
3039 else if (Ustrcmp(argrest, "ls-on-connect") == 0) tls_on_connect = TRUE;
3040 #endif
3041
3042 else badarg = TRUE;
3043 break;
3044
3045
3046 /* -U: This means "initial user submission" in sendmail, apparently. The
3047 doc claims that in future sendmail may refuse syntactically invalid
3048 messages instead of fixing them. For the moment, we just ignore it. */
3049
3050 case 'U':
3051 break;
3052
3053
3054 /* -v: verify things - this is a very low-level debugging */
3055
3056 case 'v':
3057 if (*argrest == 0)
3058 {
3059 debug_selector |= D_v;
3060 debug_file = stderr;
3061 }
3062 else badarg = TRUE;
3063 break;
3064
3065
3066 /* -x: AIX uses this to indicate some fancy 8-bit character stuff:
3067
3068 The -x flag tells the sendmail command that mail from a local
3069 mail program has National Language Support (NLS) extended characters
3070 in the body of the mail item. The sendmail command can send mail with
3071 extended NLS characters across networks that normally corrupts these
3072 8-bit characters.
3073
3074 As Exim is 8-bit clean, it just ignores this flag. */
3075
3076 case 'x':
3077 if (*argrest != 0) badarg = TRUE;
3078 break;
3079
3080 /* All other initial characters are errors */
3081
3082 default:
3083 badarg = TRUE;
3084 break;
3085 } /* End of high-level switch statement */
3086
3087 /* Failed to recognize the option, or syntax error */
3088
3089 if (badarg)
3090 {
3091 fprintf(stderr, "exim abandoned: unknown, malformed, or incomplete "
3092 "option %s\n", arg);
3093 exit(EXIT_FAILURE);
3094 }
3095 }
3096
3097
3098 /* If -R or -S have been specified without -q, assume a single queue run. */
3099
3100 if ((deliver_selectstring != NULL || deliver_selectstring_sender != NULL) &&
3101 queue_interval < 0) queue_interval = 0;
3102
3103
3104 END_ARG:
3105 /* If usage_wanted is set we call the usage function - which never returns */
3106 if (usage_wanted) exim_usage(called_as);
3107
3108 /* Arguments have been processed. Check for incompatibilities. */
3109 if ((
3110 (smtp_input || extract_recipients || recipients_arg < argc) &&
3111 (daemon_listen || queue_interval >= 0 || bi_option ||
3112 test_retry_arg >= 0 || test_rewrite_arg >= 0 ||
3113 filter_test != FTEST_NONE || (msg_action_arg > 0 && !one_msg_action))
3114 ) ||
3115 (
3116 msg_action_arg > 0 &&
3117 (daemon_listen || queue_interval >= 0 || list_options ||
3118 (checking && msg_action != MSG_LOAD) ||
3119 bi_option || test_retry_arg >= 0 || test_rewrite_arg >= 0)
3120 ) ||
3121 (
3122 (daemon_listen || queue_interval >= 0) &&
3123 (sender_address != NULL || list_options || list_queue || checking ||
3124 bi_option)
3125 ) ||
3126 (
3127 daemon_listen && queue_interval == 0
3128 ) ||
3129 (
3130 list_options &&
3131 (checking || smtp_input || extract_recipients ||
3132 filter_test != FTEST_NONE || bi_option)
3133 ) ||
3134 (
3135 verify_address_mode &&
3136 (address_test_mode || smtp_input || extract_recipients ||
3137 filter_test != FTEST_NONE || bi_option)
3138 ) ||
3139 (
3140 address_test_mode && (smtp_input || extract_recipients ||
3141 filter_test != FTEST_NONE || bi_option)
3142 ) ||
3143 (
3144 smtp_input && (sender_address != NULL || filter_test != FTEST_NONE ||
3145 extract_recipients)
3146 ) ||
3147 (
3148 deliver_selectstring != NULL && queue_interval < 0
3149 ) ||
3150 (
3151 msg_action == MSG_LOAD &&
3152 (!expansion_test || expansion_test_message != NULL)
3153 )
3154 )
3155 {
3156 fprintf(stderr, "exim: incompatible command-line options or arguments\n");
3157 exit(EXIT_FAILURE);
3158 }
3159
3160 /* If debugging is set up, set the file and the file descriptor to pass on to
3161 child processes. It should, of course, be 2 for stderr. Also, force the daemon
3162 to run in the foreground. */
3163
3164 if (debug_selector != 0)
3165 {
3166 debug_file = stderr;
3167 debug_fd = fileno(debug_file);
3168 background_daemon = FALSE;
3169 if (running_in_test_harness) millisleep(100); /* lets caller finish */
3170 if (debug_selector != D_v) /* -v only doesn't show this */
3171 {
3172 debug_printf("Exim version %s uid=%ld gid=%ld pid=%d D=%x\n",
3173 version_string, (long int)real_uid, (long int)real_gid, (int)getpid(),
3174 debug_selector);
3175 if (!version_printed)
3176 show_whats_supported(stderr);
3177 }
3178 }
3179
3180 /* When started with root privilege, ensure that the limits on the number of
3181 open files and the number of processes (where that is accessible) are
3182 sufficiently large, or are unset, in case Exim has been called from an
3183 environment where the limits are screwed down. Not all OS have the ability to
3184 change some of these limits. */
3185
3186 if (unprivileged)
3187 {
3188 DEBUG(D_any) debug_print_ids(US"Exim has no root privilege:");
3189 }
3190 else
3191 {
3192 struct rlimit rlp;
3193
3194 #ifdef RLIMIT_NOFILE
3195 if (getrlimit(RLIMIT_NOFILE, &rlp) < 0)
3196 {
3197 log_write(0, LOG_MAIN|LOG_PANIC, "getrlimit(RLIMIT_NOFILE) failed: %s",
3198 strerror(errno));
3199 rlp.rlim_cur = rlp.rlim_max = 0;
3200 }
3201
3202 /* I originally chose 1000 as a nice big number that was unlikely to
3203 be exceeded. It turns out that some older OS have a fixed upper limit of
3204 256. */
3205
3206 if (rlp.rlim_cur < 1000)
3207 {
3208 rlp.rlim_cur = rlp.rlim_max = 1000;
3209 if (setrlimit(RLIMIT_NOFILE, &rlp) < 0)
3210 {
3211 rlp.rlim_cur = rlp.rlim_max = 256;
3212 if (setrlimit(RLIMIT_NOFILE, &rlp) < 0)
3213 log_write(0, LOG_MAIN|LOG_PANIC, "setrlimit(RLIMIT_NOFILE) failed: %s",
3214 strerror(errno));
3215 }
3216 }
3217 #endif
3218
3219 #ifdef RLIMIT_NPROC
3220 if (getrlimit(RLIMIT_NPROC, &rlp) < 0)
3221 {
3222 log_write(0, LOG_MAIN|LOG_PANIC, "getrlimit(RLIMIT_NPROC) failed: %s",
3223 strerror(errno));
3224 rlp.rlim_cur = rlp.rlim_max = 0;
3225 }
3226
3227 #ifdef RLIM_INFINITY
3228 if (rlp.rlim_cur != RLIM_INFINITY && rlp.rlim_cur < 1000)
3229 {
3230 rlp.rlim_cur = rlp.rlim_max = RLIM_INFINITY;
3231 #else
3232 if (rlp.rlim_cur < 1000)
3233 {
3234 rlp.rlim_cur = rlp.rlim_max = 1000;
3235 #endif
3236 if (setrlimit(RLIMIT_NPROC, &rlp) < 0)
3237 log_write(0, LOG_MAIN|LOG_PANIC, "setrlimit(RLIMIT_NPROC) failed: %s",
3238 strerror(errno));
3239 }
3240 #endif
3241 }
3242
3243 /* Exim is normally entered as root (but some special configurations are
3244 possible that don't do this). However, it always spins off sub-processes that
3245 set their uid and gid as required for local delivery. We don't want to pass on
3246 any extra groups that root may belong to, so we want to get rid of them all at
3247 this point.
3248
3249 We need to obey setgroups() at this stage, before possibly giving up root
3250 privilege for a changed configuration file, but later on we might need to
3251 check on the additional groups for the admin user privilege - can't do that
3252 till after reading the config, which might specify the exim gid. Therefore,
3253 save the group list here first. */
3254
3255 group_count = getgroups(NGROUPS_MAX, group_list);
3256
3257 /* There is a fundamental difference in some BSD systems in the matter of
3258 groups. FreeBSD and BSDI are known to be different; NetBSD and OpenBSD are
3259 known not to be different. On the "different" systems there is a single group
3260 list, and the first entry in it is the current group. On all other versions of
3261 Unix there is a supplementary group list, which is in *addition* to the current
3262 group. Consequently, to get rid of all extraneous groups on a "standard" system
3263 you pass over 0 groups to setgroups(), while on a "different" system you pass
3264 over a single group - the current group, which is always the first group in the
3265 list. Calling setgroups() with zero groups on a "different" system results in
3266 an error return. The following code should cope with both types of system.
3267
3268 However, if this process isn't running as root, setgroups() can't be used
3269 since you have to be root to run it, even if throwing away groups. Not being
3270 root here happens only in some unusual configurations. We just ignore the
3271 error. */
3272
3273 if (setgroups(0, NULL) != 0)
3274 {
3275 if (setgroups(1, group_list) != 0 && !unprivileged)
3276 {
3277 fprintf(stderr, "exim: setgroups() failed: %s\n", strerror(errno));
3278 exit(EXIT_FAILURE);
3279 }
3280 }
3281
3282 /* If the configuration file name has been altered by an argument on the
3283 command line (either a new file name or a macro definition) and the caller is
3284 not root, or if this is a filter testing run, remove any setuid privilege the
3285 program has and run as the underlying user.
3286
3287 The exim user is locked out of this, which severely restricts the use of -C
3288 for some purposes.
3289
3290 Otherwise, set the real ids to the effective values (should be root unless run
3291 from inetd, which it can either be root or the exim uid, if one is configured).
3292
3293 There is a private mechanism for bypassing some of this, in order to make it
3294 possible to test lots of configurations automatically, without having either to
3295 recompile each time, or to patch in an actual configuration file name and other
3296 values (such as the path name). If running in the test harness, pretend that
3297 configuration file changes and macro definitions haven't happened. */
3298
3299 if (( /* EITHER */
3300 (!trusted_config || /* Config changed, or */
3301 !macros_trusted()) && /* impermissible macros and */
3302 real_uid != root_uid && /* Not root, and */
3303 !running_in_test_harness /* Not fudged */
3304 ) || /* OR */
3305 expansion_test /* expansion testing */
3306 || /* OR */
3307 filter_test != FTEST_NONE) /* Filter testing */
3308 {
3309 setgroups(group_count, group_list);
3310 exim_setugid(real_uid, real_gid, FALSE,
3311 US"-C, -D, -be or -bf forces real uid");
3312 removed_privilege = TRUE;
3313
3314 /* In the normal case when Exim is called like this, stderr is available
3315 and should be used for any logging information because attempts to write
3316 to the log will usually fail. To arrange this, we unset really_exim. However,
3317 if no stderr is available there is no point - we might as well have a go
3318 at the log (if it fails, syslog will be written). */
3319
3320 if (log_stderr != NULL) really_exim = FALSE;
3321 }
3322
3323 /* Privilege is to be retained for the moment. It may be dropped later,
3324 depending on the job that this Exim process has been asked to do. For now, set
3325 the real uid to the effective so that subsequent re-execs of Exim are done by a
3326 privileged user. */
3327
3328 else exim_setugid(geteuid(), getegid(), FALSE, US"forcing real = effective");
3329
3330 /* If testing a filter, open the file(s) now, before wasting time doing other
3331 setups and reading the message. */
3332
3333 if ((filter_test & FTEST_SYSTEM) != 0)
3334 {
3335 filter_sfd = Uopen(filter_test_sfile, O_RDONLY, 0);
3336 if (filter_sfd < 0)
3337 {
3338 fprintf(stderr, "exim: failed to open %s: %s\n", filter_test_sfile,
3339 strerror(errno));
3340 return EXIT_FAILURE;
3341 }
3342 }
3343
3344 if ((filter_test & FTEST_USER) != 0)
3345 {
3346 filter_ufd = Uopen(filter_test_ufile, O_RDONLY, 0);
3347 if (filter_ufd < 0)
3348 {
3349 fprintf(stderr, "exim: failed to open %s: %s\n", filter_test_ufile,
3350 strerror(errno));
3351 return EXIT_FAILURE;
3352 }
3353 }
3354
3355 /* Read the main runtime configuration data; this gives up if there
3356 is a failure. It leaves the configuration file open so that the subsequent
3357 configuration data for delivery can be read if needed. */
3358
3359 readconf_main();
3360
3361 /* Handle the decoding of logging options. */
3362
3363 decode_bits(&log_write_selector, &log_extra_selector, 0, 0,
3364 log_selector_string, log_options, log_options_count, US"log", 0);
3365
3366 DEBUG(D_any)
3367 {
3368 debug_printf("configuration file is %s\n", config_main_filename);
3369 debug_printf("log selectors = %08x %08x\n", log_write_selector,
3370 log_extra_selector);
3371 }
3372
3373 /* If domain literals are not allowed, check the sender address that was
3374 supplied with -f. Ditto for a stripped trailing dot. */
3375
3376 if (sender_address != NULL)
3377 {
3378 if (sender_address[sender_address_domain] == '[' && !allow_domain_literals)
3379 {
3380 fprintf(stderr, "exim: bad -f address \"%s\": domain literals not "
3381 "allowed\n", sender_address);
3382 return EXIT_FAILURE;
3383 }
3384 if (f_end_dot && !strip_trailing_dot)
3385 {
3386 fprintf(stderr, "exim: bad -f address \"%s.\": domain is malformed "
3387 "(trailing dot not allowed)\n", sender_address);
3388 return EXIT_FAILURE;
3389 }
3390 }
3391
3392 /* Paranoia check of maximum lengths of certain strings. There is a check
3393 on the length of the log file path in log.c, which will come into effect
3394 if there are any calls to write the log earlier than this. However, if we
3395 get this far but the string is very long, it is better to stop now than to
3396 carry on and (e.g.) receive a message and then have to collapse. The call to
3397 log_write() from here will cause the ultimate panic collapse if the complete
3398 file name exceeds the buffer length. */
3399
3400 if (Ustrlen(log_file_path) > 200)
3401 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3402 "log_file_path is longer than 200 chars: aborting");
3403
3404 if (Ustrlen(pid_file_path) > 200)
3405 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3406 "pid_file_path is longer than 200 chars: aborting");
3407
3408 if (Ustrlen(spool_directory) > 200)
3409 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3410 "spool_directory is longer than 200 chars: aborting");
3411
3412 /* Length check on the process name given to syslog for its TAG field,
3413 which is only permitted to be 32 characters or less. See RFC 3164. */
3414
3415 if (Ustrlen(syslog_processname) > 32)
3416 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3417 "syslog_processname is longer than 32 chars: aborting");
3418
3419 /* In some operating systems, the environment variable TMPDIR controls where
3420 temporary files are created; Exim doesn't use these (apart from when delivering
3421 to MBX mailboxes), but called libraries such as DBM libraries may require them.
3422 If TMPDIR is found in the environment, reset it to the value defined in the
3423 TMPDIR macro, if this macro is defined. */
3424
3425 #ifdef TMPDIR
3426 {
3427 uschar **p;
3428 for (p = USS environ; *p != NULL; p++)
3429 {
3430 if (Ustrncmp(*p, "TMPDIR=", 7) == 0 &&
3431 Ustrcmp(*p+7, TMPDIR) != 0)
3432 {
3433 uschar *newp = malloc(Ustrlen(TMPDIR) + 8);
3434 sprintf(CS newp, "TMPDIR=%s", TMPDIR);
3435 *p = newp;
3436 DEBUG(D_any) debug_printf("reset TMPDIR=%s in environment\n", TMPDIR);
3437 }
3438 }
3439 }
3440 #endif
3441
3442 /* Timezone handling. If timezone_string is "utc", set a flag to cause all
3443 timestamps to be in UTC (gmtime() is used instead of localtime()). Otherwise,
3444 we may need to get rid of a bogus timezone setting. This can arise when Exim is
3445 called by a user who has set the TZ variable. This then affects the timestamps
3446 in log files and in Received: headers, and any created Date: header lines. The
3447 required timezone is settable in the configuration file, so nothing can be done
3448 about this earlier - but hopefully nothing will normally be logged earlier than
3449 this. We have to make a new environment if TZ is wrong, but don't bother if
3450 timestamps_utc is set, because then all times are in UTC anyway. */
3451
3452 if (timezone_string != NULL && strcmpic(timezone_string, US"UTC") == 0)
3453 {
3454 timestamps_utc = TRUE;
3455 }
3456 else
3457 {
3458 uschar *envtz = US getenv("TZ");
3459 if ((envtz == NULL && timezone_string != NULL) ||
3460 (envtz != NULL &&
3461 (timezone_string == NULL ||
3462 Ustrcmp(timezone_string, envtz) != 0)))
3463 {
3464 uschar **p = USS environ;
3465 uschar **new;
3466 uschar **newp;
3467 int count = 0;
3468 while (*p++ != NULL) count++;
3469 if (envtz == NULL) count++;
3470 newp = new = malloc(sizeof(uschar *) * (count + 1));
3471 for (p = USS environ; *p != NULL; p++)
3472 {
3473 if (Ustrncmp(*p, "TZ=", 3) == 0) continue;
3474 *newp++ = *p;
3475 }
3476 if (timezone_string != NULL)
3477 {
3478 *newp = malloc(Ustrlen(timezone_string) + 4);
3479 sprintf(CS *newp++, "TZ=%s", timezone_string);
3480 }
3481 *newp = NULL;
3482 environ = CSS new;
3483 tzset();
3484 DEBUG(D_any) debug_printf("Reset TZ to %s: time is %s\n", timezone_string,
3485 tod_stamp(tod_log));
3486 }
3487 }
3488
3489 /* Handle the case when we have removed the setuid privilege because of -C or
3490 -D. This means that the caller of Exim was not root.
3491
3492 There is a problem if we were running as the Exim user. The sysadmin may
3493 expect this case to retain privilege because "the binary was called by the
3494 Exim user", but it hasn't, because either the -D option set macros, or the
3495 -C option set a non-trusted configuration file. There are two possibilities:
3496
3497 (1) If deliver_drop_privilege is set, Exim is not going to re-exec in order
3498 to do message deliveries. Thus, the fact that it is running as a
3499 non-privileged user is plausible, and might be wanted in some special
3500 configurations. However, really_exim will have been set false when
3501 privilege was dropped, to stop Exim trying to write to its normal log
3502 files. Therefore, re-enable normal log processing, assuming the sysadmin
3503 has set up the log directory correctly.
3504
3505 (2) If deliver_drop_privilege is not set, the configuration won't work as
3506 apparently intended, and so we log a panic message. In order to retain
3507 root for -C or -D, the caller must either be root or be invoking a
3508 trusted configuration file (when deliver_drop_privilege is false). */
3509
3510 if (removed_privilege && (!trusted_config || macros != NULL) &&
3511 real_uid == exim_uid)
3512 {
3513 if (deliver_drop_privilege)
3514 really_exim = TRUE; /* let logging work normally */
3515 else
3516 log_write(0, LOG_MAIN|LOG_PANIC,
3517 "exim user lost privilege for using %s option",
3518 trusted_config? "-D" : "-C");
3519 }
3520
3521 /* Start up Perl interpreter if Perl support is configured and there is a
3522 perl_startup option, and the configuration or the command line specifies
3523 initializing starting. Note that the global variables are actually called
3524 opt_perl_xxx to avoid clashing with perl's namespace (perl_*). */
3525
3526 #ifdef EXIM_PERL
3527 if (perl_start_option != 0)
3528 opt_perl_at_start = (perl_start_option > 0);
3529 if (opt_perl_at_start && opt_perl_startup != NULL)
3530 {
3531 uschar *errstr;
3532 DEBUG(D_any) debug_printf("Starting Perl interpreter\n");
3533 errstr = init_perl(opt_perl_startup);
3534 if (errstr != NULL)
3535 {
3536 fprintf(stderr, "exim: error in perl_startup code: %s\n", errstr);
3537 return EXIT_FAILURE;
3538 }
3539 opt_perl_started = TRUE;
3540 }
3541 #endif /* EXIM_PERL */
3542
3543 /* Initialise lookup_list
3544 If debugging, already called above via version reporting.
3545 This does mean that debugging causes the list to be initialised while root.
3546 This *should* be harmless -- all modules are loaded from a fixed dir and
3547 it's code that would, if not a module, be part of Exim already. */
3548 init_lookup_list();
3549
3550 /* Log the arguments of the call if the configuration file said so. This is
3551 a debugging feature for finding out what arguments certain MUAs actually use.
3552 Don't attempt it if logging is disabled, or if listing variables or if
3553 verifying/testing addresses or expansions. */
3554
3555 if (((debug_selector & D_any) != 0 || (log_extra_selector & LX_arguments) != 0)
3556 && really_exim && !list_options && !checking)
3557 {
3558 int i;
3559 uschar *p = big_buffer;
3560 Ustrcpy(p, "cwd=");
3561 (void)getcwd(CS p+4, big_buffer_size - 4);
3562 while (*p) p++;
3563 (void)string_format(p, big_buffer_size - (p - big_buffer), " %d args:", argc);
3564 while (*p) p++;
3565 for (i = 0; i < argc; i++)
3566 {
3567 int len = Ustrlen(argv[i]);
3568 uschar *printing;
3569 uschar *quote;
3570 if (p + len + 8 >= big_buffer + big_buffer_size)
3571 {
3572 Ustrcpy(p, " ...");
3573 log_write(0, LOG_MAIN, "%s", big_buffer);
3574 Ustrcpy(big_buffer, "...");
3575 p = big_buffer + 3;
3576 }
3577 printing = string_printing(argv[i]);
3578 if (printing[0] == 0) quote = US"\""; else
3579 {
3580 uschar *pp = printing;
3581 quote = US"";
3582 while (*pp != 0) if (isspace(*pp++)) { quote = US"\""; break; }
3583 }
3584 sprintf(CS p, " %s%.*s%s", quote, (int)(big_buffer_size -
3585 (p - big_buffer) - 4), printing, quote);
3586 while (*p) p++;
3587 }
3588
3589 if ((log_extra_selector & LX_arguments) != 0)
3590 log_write(0, LOG_MAIN, "%s", big_buffer);
3591 else
3592 debug_printf("%s\n", big_buffer);
3593 }
3594
3595 /* Set the working directory to be the top-level spool directory. We don't rely
3596 on this in the code, which always uses fully qualified names, but it's useful
3597 for core dumps etc. Don't complain if it fails - the spool directory might not
3598 be generally accessible and calls with the -C option (and others) have lost
3599 privilege by now. Before the chdir, we try to ensure that the directory exists.
3600 */
3601
3602 if (Uchdir(spool_directory) != 0)
3603 {
3604 (void)directory_make(spool_directory, US"", SPOOL_DIRECTORY_MODE, FALSE);
3605 (void)Uchdir(spool_directory);
3606 }
3607
3608 /* Handle calls with the -bi option. This is a sendmail option to rebuild *the*
3609 alias file. Exim doesn't have such a concept, but this call is screwed into
3610 Sun's YP makefiles. Handle this by calling a configured script, as the real
3611 user who called Exim. The -oA option can be used to pass an argument to the
3612 script. */
3613
3614 if (bi_option)
3615 {
3616 (void)fclose(config_file);
3617 if (bi_command != NULL)
3618 {
3619 int i = 0;
3620 uschar *argv[3];
3621 argv[i++] = bi_command;
3622 if (alias_arg != NULL) argv[i++] = alias_arg;
3623 argv[i++] = NULL;
3624
3625 setgroups(group_count, group_list);
3626 exim_setugid(real_uid, real_gid, FALSE, US"running bi_command");
3627
3628 DEBUG(D_exec) debug_printf("exec %.256s %.256s\n", argv[0],
3629 (argv[1] == NULL)? US"" : argv[1]);
3630
3631 execv(CS argv[0], (char *const *)argv);
3632 fprintf(stderr, "exim: exec failed: %s\n", strerror(errno));
3633 exit(EXIT_FAILURE);
3634 }
3635 else
3636 {
3637 DEBUG(D_any) debug_printf("-bi used but bi_command not set; exiting\n");
3638 exit(EXIT_SUCCESS);
3639 }
3640 }
3641
3642 /* If an action on specific messages is requested, or if a daemon or queue
3643 runner is being started, we need to know if Exim was called by an admin user.
3644 This is the case if the real user is root or exim, or if the real group is
3645 exim, or if one of the supplementary groups is exim or a group listed in
3646 admin_groups. We don't fail all message actions immediately if not admin_user,
3647 since some actions can be performed by non-admin users. Instead, set admin_user
3648 for later interrogation. */
3649
3650 if (real_uid == root_uid || real_uid == exim_uid || real_gid == exim_gid)
3651 admin_user = TRUE;
3652 else
3653 {
3654 int i, j;
3655 for (i = 0; i < group_count; i++)
3656 {
3657 if (group_list[i] == exim_gid) admin_user = TRUE;
3658 else if (admin_groups != NULL)
3659 {
3660 for (j = 1; j <= (int)(admin_groups[0]); j++)
3661 if (admin_groups[j] == group_list[i])
3662 { admin_user = TRUE; break; }
3663 }
3664 if (admin_user) break;
3665 }
3666 }
3667
3668 /* Another group of privileged users are the trusted users. These are root,
3669 exim, and any caller matching trusted_users or trusted_groups. Trusted callers
3670 are permitted to specify sender_addresses with -f on the command line, and
3671 other message parameters as well. */
3672
3673 if (real_uid == root_uid || real_uid == exim_uid)
3674 trusted_caller = TRUE;
3675 else
3676 {
3677 int i, j;
3678
3679 if (trusted_users != NULL)
3680 {
3681 for (i = 1; i <= (int)(trusted_users[0]); i++)
3682 if (trusted_users[i] == real_uid)
3683 { trusted_caller = TRUE; break; }
3684 }
3685
3686 if (!trusted_caller && trusted_groups != NULL)
3687 {
3688 for (i = 1; i <= (int)(trusted_groups[0]); i++)
3689 {
3690 if (trusted_groups[i] == real_gid)
3691 trusted_caller = TRUE;
3692 else for (j = 0; j < group_count; j++)
3693 {
3694 if (trusted_groups[i] == group_list[j])
3695 { trusted_caller = TRUE; break; }
3696 }
3697 if (trusted_caller) break;
3698 }
3699 }
3700 }
3701
3702 if (trusted_caller) DEBUG(D_any) debug_printf("trusted user\n");
3703 if (admin_user) DEBUG(D_any) debug_printf("admin user\n");
3704
3705 /* Only an admin user may start the daemon or force a queue run in the default
3706 configuration, but the queue run restriction can be relaxed. Only an admin
3707 user may request that a message be returned to its sender forthwith. Only an
3708 admin user may specify a debug level greater than D_v (because it might show
3709 passwords, etc. in lookup queries). Only an admin user may request a queue
3710 count. Only an admin user can use the test interface to scan for email
3711 (because Exim will be in the spool dir and able to look at mails). */
3712
3713 if (!admin_user)
3714 {
3715 BOOL debugset = (debug_selector & ~D_v) != 0;
3716 if (deliver_give_up || daemon_listen || malware_test_file ||
3717 (count_queue && queue_list_requires_admin) ||
3718 (list_queue && queue_list_requires_admin) ||
3719 (queue_interval >= 0 && prod_requires_admin) ||
3720 (debugset && !running_in_test_harness))
3721 {
3722 fprintf(stderr, "exim:%s permission denied\n", debugset? " debugging" : "");
3723 exit(EXIT_FAILURE);
3724 }
3725 }
3726
3727 /* If the real user is not root or the exim uid, the argument for passing
3728 in an open TCP/IP connection for another message is not permitted, nor is
3729 running with the -N option for any delivery action, unless this call to exim is
3730 one that supplied an input message, or we are using a patched exim for
3731 regression testing. */
3732
3733 if (real_uid != root_uid && real_uid != exim_uid &&
3734 (continue_hostname != NULL ||
3735 (dont_deliver &&
3736 (queue_interval >= 0 || daemon_listen || msg_action_arg > 0)
3737 )) && !running_in_test_harness)
3738 {
3739 fprintf(stderr, "exim: Permission denied\n");
3740 return EXIT_FAILURE;
3741 }
3742
3743 /* If the caller is not trusted, certain arguments are ignored when running for
3744 real, but are permitted when checking things (-be, -bv, -bt, -bh, -bf, -bF).
3745 Note that authority for performing certain actions on messages is tested in the
3746 queue_action() function. */
3747
3748 if (!trusted_caller && !checking && filter_test == FTEST_NONE)
3749 {
3750 sender_host_name = sender_host_address = interface_address =
3751 sender_ident = received_protocol = NULL;
3752 sender_host_port = interface_port = 0;
3753 sender_host_authenticated = authenticated_sender = authenticated_id = NULL;
3754 }
3755
3756 /* If a sender host address is set, extract the optional port number off the
3757 end of it and check its syntax. Do the same thing for the interface address.
3758 Exim exits if the syntax is bad. */
3759
3760 else
3761 {
3762 if (sender_host_address != NULL)
3763 sender_host_port = check_port(sender_host_address);
3764 if (interface_address != NULL)
3765 interface_port = check_port(interface_address);
3766 }
3767
3768 /* If an SMTP message is being received check to see if the standard input is a
3769 TCP/IP socket. If it is, we assume that Exim was called from inetd if the
3770 caller is root or the Exim user, or if the port is a privileged one. Otherwise,
3771 barf. */
3772
3773 if (smtp_input)
3774 {
3775 union sockaddr_46 inetd_sock;
3776 EXIM_SOCKLEN_T size = sizeof(inetd_sock);
3777 if (getpeername(0, (struct sockaddr *)(&inetd_sock), &size) == 0)
3778 {
3779 int family = ((struct sockaddr *)(&inetd_sock))->sa_family;
3780 if (family == AF_INET || family == AF_INET6)
3781 {
3782 union sockaddr_46 interface_sock;
3783 size = sizeof(interface_sock);
3784
3785 if (getsockname(0, (struct sockaddr *)(&interface_sock), &size) == 0)
3786 interface_address = host_ntoa(-1, &interface_sock, NULL,
3787 &interface_port);
3788
3789 if (host_is_tls_on_connect_port(interface_port)) tls_on_connect = TRUE;
3790
3791 if (real_uid == root_uid || real_uid == exim_uid || interface_port < 1024)
3792 {
3793 is_inetd = TRUE;
3794 sender_host_address = host_ntoa(-1, (struct sockaddr *)(&inetd_sock),
3795 NULL, &sender_host_port);
3796 if (mua_wrapper) log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Input from "
3797 "inetd is not supported when mua_wrapper is set");
3798 }
3799 else
3800 {
3801 fprintf(stderr,
3802 "exim: Permission denied (unprivileged user, unprivileged port)\n");
3803 return EXIT_FAILURE;
3804 }
3805 }
3806 }
3807 }
3808
3809 /* If the load average is going to be needed while receiving a message, get it
3810 now for those OS that require the first call to os_getloadavg() to be done as
3811 root. There will be further calls later for each message received. */
3812
3813 #ifdef LOAD_AVG_NEEDS_ROOT
3814 if (receiving_message &&
3815 (queue_only_load >= 0 ||
3816 (is_inetd && smtp_load_reserve >= 0)
3817 ))
3818 {
3819 load_average = OS_GETLOADAVG();
3820 }
3821 #endif
3822
3823 /* The queue_only configuration option can be overridden by -odx on the command
3824 line, except that if queue_only_override is false, queue_only cannot be unset
3825 from the command line. */
3826
3827 if (queue_only_set && (queue_only_override || arg_queue_only))
3828 queue_only = arg_queue_only;
3829
3830 /* The receive_timeout and smtp_receive_timeout options can be overridden by
3831 -or and -os. */
3832
3833 if (arg_receive_timeout >= 0) receive_timeout = arg_receive_timeout;
3834 if (arg_smtp_receive_timeout >= 0)
3835 smtp_receive_timeout = arg_smtp_receive_timeout;
3836
3837 /* If Exim was started with root privilege, unless we have already removed the
3838 root privilege above as a result of -C, -D, -be, -bf or -bF, remove it now
3839 except when starting the daemon or doing some kind of delivery or address
3840 testing (-bt). These are the only cases when root need to be retained. We run
3841 as exim for -bv and -bh. However, if deliver_drop_privilege is set, root is
3842 retained only for starting the daemon. We always do the initgroups() in this
3843 situation (controlled by the TRUE below), in order to be as close as possible
3844 to the state Exim usually runs in. */
3845
3846 if (!unprivileged && /* originally had root AND */
3847 !removed_privilege && /* still got root AND */
3848 !daemon_listen && /* not starting the daemon */
3849 queue_interval <= 0 && /* (either kind of daemon) */
3850 ( /* AND EITHER */
3851 deliver_drop_privilege || /* requested unprivileged */
3852 ( /* OR */
3853 queue_interval < 0 && /* not running the queue */
3854 (msg_action_arg < 0 || /* and */
3855 msg_action != MSG_DELIVER) && /* not delivering and */
3856 (!checking || !address_test_mode) /* not address checking */
3857 )
3858 ))
3859 {
3860 exim_setugid(exim_uid, exim_gid, TRUE, US"privilege not needed");
3861 }
3862
3863 /* When we are retaining a privileged uid, we still change to the exim gid. */
3864
3865 else setgid(exim_gid);
3866
3867 /* Handle a request to scan a file for malware */
3868 if (malware_test_file)
3869 {
3870 #ifdef WITH_CONTENT_SCAN
3871 int result;
3872 set_process_info("scanning file for malware");
3873 result = malware_in_file(malware_test_file);
3874 if (result == FAIL)
3875 {
3876 printf("No malware found.\n");
3877 exit(EXIT_SUCCESS);
3878 }
3879 if (result != OK)
3880 {
3881 printf("Malware lookup returned non-okay/fail: %d\n", result);
3882 exit(EXIT_FAILURE);
3883 }
3884 if (malware_name)
3885 printf("Malware found: %s\n", malware_name);
3886 else
3887 printf("Malware scan detected malware of unknown name.\n");
3888 #else
3889 printf("Malware scanning not enabled at compile time.\n");
3890 #endif
3891 exit(EXIT_FAILURE);
3892 }
3893
3894 /* Handle a request to list the delivery queue */
3895
3896 if (list_queue)
3897 {
3898 set_process_info("listing the queue");
3899 queue_list(list_queue_option, argv + recipients_arg, argc - recipients_arg);
3900 exit(EXIT_SUCCESS);
3901 }
3902
3903 /* Handle a request to count the delivery queue */
3904
3905 if (count_queue)
3906 {
3907 set_process_info("counting the queue");
3908 queue_count();
3909 exit(EXIT_SUCCESS);
3910 }
3911
3912 /* Handle actions on specific messages, except for the force delivery and
3913 message load actions, which are done below. Some actions take a whole list of
3914 message ids, which are known to continue up to the end of the arguments. Others
3915 take a single message id and then operate on the recipients list. */
3916
3917 if (msg_action_arg > 0 && msg_action != MSG_DELIVER && msg_action != MSG_LOAD)
3918 {
3919 int yield = EXIT_SUCCESS;
3920 set_process_info("acting on specified messages");
3921
3922 if (!one_msg_action)
3923 {
3924 for (i = msg_action_arg; i < argc; i++)
3925 if (!queue_action(argv[i], msg_action, NULL, 0, 0))
3926 yield = EXIT_FAILURE;
3927 }
3928
3929 else if (!queue_action(argv[msg_action_arg], msg_action, argv, argc,
3930 recipients_arg)) yield = EXIT_FAILURE;
3931 exit(yield);
3932 }
3933
3934 /* All the modes below here require the remaining configuration sections
3935 to be read, except that we can skip over the ACL setting when delivering
3936 specific messages, or doing a queue run. (For various testing cases we could
3937 skip too, but as they are rare, it doesn't really matter.) The argument is TRUE
3938 for skipping. */
3939
3940 readconf_rest(msg_action_arg > 0 || (queue_interval == 0 && !daemon_listen));
3941
3942 /* The configuration data will have been read into POOL_PERM because we won't
3943 ever want to reset back past it. Change the current pool to POOL_MAIN. In fact,
3944 this is just a bit of pedantic tidiness. It wouldn't really matter if the
3945 configuration were read into POOL_MAIN, because we don't do any resets till
3946 later on. However, it seems right, and it does ensure that both pools get used.
3947 */
3948
3949 store_pool = POOL_MAIN;
3950
3951 /* Handle the -brt option. This is for checking out retry configurations.
3952 The next three arguments are a domain name or a complete address, and
3953 optionally two error numbers. All it does is to call the function that
3954 scans the retry configuration data. */
3955
3956 if (test_retry_arg >= 0)
3957 {
3958 retry_config *yield;
3959 int basic_errno = 0;
3960 int more_errno = 0;
3961 uschar *s1, *s2;
3962
3963 if (test_retry_arg >= argc)
3964 {
3965 printf("-brt needs a domain or address argument\n");
3966 exim_exit(EXIT_FAILURE);
3967 }
3968 s1 = argv[test_retry_arg++];
3969 s2 = NULL;
3970
3971 /* If the first argument contains no @ and no . it might be a local user
3972 or it might be a single-component name. Treat as a domain. */
3973
3974 if (Ustrchr(s1, '@') == NULL && Ustrchr(s1, '.') == NULL)
3975 {
3976 printf("Warning: \"%s\" contains no '@' and no '.' characters. It is "
3977 "being \ntreated as a one-component domain, not as a local part.\n\n",
3978 s1);
3979 }
3980
3981 /* There may be an optional second domain arg. */
3982
3983 if (test_retry_arg < argc && Ustrchr(argv[test_retry_arg], '.') != NULL)
3984 s2 = argv[test_retry_arg++];
3985
3986 /* The final arg is an error name */
3987
3988 if (test_retry_arg < argc)
3989 {
3990 uschar *ss = argv[test_retry_arg];
3991 uschar *error =
3992 readconf_retry_error(ss, ss + Ustrlen(ss), &basic_errno, &more_errno);
3993 if (error != NULL)
3994 {
3995 printf("%s\n", CS error);
3996 return EXIT_FAILURE;
3997 }
3998
3999 /* For the {MAIL,RCPT,DATA}_4xx errors, a value of 255 means "any", and a
4000 code > 100 as an error is for matching codes to the decade. Turn them into
4001 a real error code, off the decade. */
4002
4003 if (basic_errno == ERRNO_MAIL4XX ||
4004 basic_errno == ERRNO_RCPT4XX ||
4005 basic_errno == ERRNO_DATA4XX)
4006 {
4007 int code = (more_errno >> 8) & 255;
4008 if (code == 255)
4009 more_errno = (more_errno & 0xffff00ff) | (21 << 8);
4010 else if (code > 100)
4011 more_errno = (more_errno & 0xffff00ff) | ((code - 96) << 8);
4012 }
4013 }
4014
4015 yield = retry_find_config(s1, s2, basic_errno, more_errno);
4016 if (yield == NULL) printf("No retry information found\n"); else
4017 {
4018 retry_rule *r;
4019 more_errno = yield->more_errno;
4020 printf("Retry rule: %s ", yield->pattern);
4021
4022 if (yield->basic_errno == ERRNO_EXIMQUOTA)
4023 {
4024 printf("quota%s%s ",
4025 (more_errno > 0)? "_" : "",
4026 (more_errno > 0)? readconf_printtime(more_errno) : US"");
4027 }
4028 else if (yield->basic_errno == ECONNREFUSED)
4029 {
4030 printf("refused%s%s ",
4031 (more_errno > 0)? "_" : "",
4032 (more_errno == 'M')? "MX" :
4033 (more_errno == 'A')? "A" : "");
4034 }
4035 else if (yield->basic_errno == ETIMEDOUT)
4036 {
4037 printf("timeout");
4038 if ((more_errno & RTEF_CTOUT) != 0) printf("_connect");
4039 more_errno &= 255;
4040 if (more_errno != 0) printf("_%s",
4041 (more_errno == 'M')? "MX" : "A");
4042 printf(" ");
4043 }
4044 else if (yield->basic_errno == ERRNO_AUTHFAIL)
4045 printf("auth_failed ");
4046 else printf("* ");
4047
4048 for (r = yield->rules; r != NULL; r = r->next)
4049 {
4050 printf("%c,%s", r->rule, readconf_printtime(r->timeout)); /* Do not */
4051 printf(",%s", readconf_printtime(r->p1)); /* amalgamate */
4052 if (r->rule == 'G')
4053 {
4054 int x = r->p2;
4055 int f = x % 1000;
4056 int d = 100;
4057 printf(",%d.", x/1000);
4058 do
4059 {
4060 printf("%d", f/d);
4061 f %= d;
4062 d /= 10;
4063 }
4064 while (f != 0);
4065 }
4066 printf("; ");
4067 }
4068
4069 printf("\n");
4070 }
4071 exim_exit(EXIT_SUCCESS);
4072 }
4073
4074 /* Handle a request to list one or more configuration options */
4075
4076 if (list_options)
4077 {
4078 set_process_info("listing variables");
4079 if (recipients_arg >= argc) readconf_print(US"all", NULL);
4080 else for (i = recipients_arg; i < argc; i++)
4081 {
4082 if (i < argc - 1 &&
4083 (Ustrcmp(argv[i], "router") == 0 ||
4084 Ustrcmp(argv[i], "transport") == 0 ||
4085 Ustrcmp(argv[i], "authenticator") == 0 ||
4086 Ustrcmp(argv[i], "macro") == 0))
4087 {
4088 readconf_print(argv[i+1], argv[i]);
4089 i++;
4090 }
4091 else readconf_print(argv[i], NULL);
4092 }
4093 exim_exit(EXIT_SUCCESS);
4094 }
4095
4096
4097 /* Handle a request to deliver one or more messages that are already on the
4098 queue. Values of msg_action other than MSG_DELIVER and MSG_LOAD are dealt with
4099 above. MSG_LOAD is handled with -be (which is the only time it applies) below.
4100
4101 Delivery of specific messages is typically used for a small number when
4102 prodding by hand (when the option forced_delivery will be set) or when
4103 re-execing to regain root privilege. Each message delivery must happen in a
4104 separate process, so we fork a process for each one, and run them sequentially
4105 so that debugging output doesn't get intertwined, and to avoid spawning too
4106 many processes if a long list is given. However, don't fork for the last one;
4107 this saves a process in the common case when Exim is called to deliver just one
4108 message. */
4109
4110 if (msg_action_arg > 0 && msg_action != MSG_LOAD)
4111 {
4112 if (prod_requires_admin && !admin_user)
4113 {
4114 fprintf(stderr, "exim: Permission denied\n"