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