inetd wait mode support with -bw
[exim.git] / src / src / exim.c
1 /*************************************************
2 * Exim - an Internet mail transport agent *
3 *************************************************/
4
5 /* Copyright (c) University of Cambridge 1995 - 2009 */
6 /* See the file NOTICE for conditions of use and distribution. */
7
8
9 /* The main function: entry point, initialization, and high-level control.
10 Also a few functions that don't naturally fit elsewhere. */
11
12
13 #include "exim.h"
14
15 extern void init_lookup_list(void);
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 * Set up processing details *
143 *************************************************/
144
145 /* Save a text string for dumping when SIGUSR1 is received.
146 Do checks for overruns.
147
148 Arguments: format and arguments, as for printf()
149 Returns: nothing
150 */
151
152 void
153 set_process_info(const char *format, ...)
154 {
155 int len;
156 va_list ap;
157 sprintf(CS process_info, "%5d ", (int)getpid());
158 len = Ustrlen(process_info);
159 va_start(ap, format);
160 if (!string_vformat(process_info + len, PROCESS_INFO_SIZE - len - 2, format, ap))
161 Ustrcpy(process_info + len, "**** string overflowed buffer ****");
162 len = Ustrlen(process_info);
163 process_info[len+0] = '\n';
164 process_info[len+1] = '\0';
165 process_info_len = len + 1;
166 DEBUG(D_process_info) debug_printf("set_process_info: %s", process_info);
167 va_end(ap);
168 }
169
170
171
172
173 /*************************************************
174 * Handler for SIGUSR1 *
175 *************************************************/
176
177 /* SIGUSR1 causes any exim process to write to the process log details of
178 what it is currently doing. It will only be used if the OS is capable of
179 setting up a handler that causes automatic restarting of any system call
180 that is in progress at the time.
181
182 This function takes care to be signal-safe.
183
184 Argument: the signal number (SIGUSR1)
185 Returns: nothing
186 */
187
188 static void
189 usr1_handler(int sig)
190 {
191 int fd;
192
193 os_restarting_signal(sig, usr1_handler);
194
195 fd = Uopen(process_log_path, O_APPEND|O_WRONLY, LOG_MODE);
196 if (fd < 0)
197 {
198 /* If we are already running as the Exim user, try to create it in the
199 current process (assuming spool_directory exists). Otherwise, if we are
200 root, do the creation in an exim:exim subprocess. */
201
202 int euid = geteuid();
203 if (euid == exim_uid)
204 fd = Uopen(process_log_path, O_CREAT|O_APPEND|O_WRONLY, LOG_MODE);
205 else if (euid == root_uid)
206 fd = log_create_as_exim(process_log_path);
207 }
208
209 /* If we are neither exim nor root, or if we failed to create the log file,
210 give up. There is not much useful we can do with errors, since we don't want
211 to disrupt whatever is going on outside the signal handler. */
212
213 if (fd < 0) return;
214
215 (void)write(fd, process_info, process_info_len);
216 (void)close(fd);
217 }
218
219
220
221 /*************************************************
222 * Timeout handler *
223 *************************************************/
224
225 /* This handler is enabled most of the time that Exim is running. The handler
226 doesn't actually get used unless alarm() has been called to set a timer, to
227 place a time limit on a system call of some kind. When the handler is run, it
228 re-enables itself.
229
230 There are some other SIGALRM handlers that are used in special cases when more
231 than just a flag setting is required; for example, when reading a message's
232 input. These are normally set up in the code module that uses them, and the
233 SIGALRM handler is reset to this one afterwards.
234
235 Argument: the signal value (SIGALRM)
236 Returns: nothing
237 */
238
239 void
240 sigalrm_handler(int sig)
241 {
242 sig = sig; /* Keep picky compilers happy */
243 sigalrm_seen = TRUE;
244 os_non_restarting_signal(SIGALRM, sigalrm_handler);
245 }
246
247
248
249 /*************************************************
250 * Sleep for a fractional time interval *
251 *************************************************/
252
253 /* This function is called by millisleep() and exim_wait_tick() to wait for a
254 period of time that may include a fraction of a second. The coding is somewhat
255 tedious. We do not expect setitimer() ever to fail, but if it does, the process
256 will wait for ever, so we panic in this instance. (There was a case of this
257 when a bug in a function that calls milliwait() caused it to pass invalid data.
258 That's when I added the check. :-)
259
260 Argument: an itimerval structure containing the interval
261 Returns: nothing
262 */
263
264 static void
265 milliwait(struct itimerval *itval)
266 {
267 sigset_t sigmask;
268 sigset_t old_sigmask;
269 (void)sigemptyset(&sigmask); /* Empty mask */
270 (void)sigaddset(&sigmask, SIGALRM); /* Add SIGALRM */
271 (void)sigprocmask(SIG_BLOCK, &sigmask, &old_sigmask); /* Block SIGALRM */
272 if (setitimer(ITIMER_REAL, itval, NULL) < 0) /* Start timer */
273 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
274 "setitimer() failed: %s", strerror(errno));
275 (void)sigfillset(&sigmask); /* All signals */
276 (void)sigdelset(&sigmask, SIGALRM); /* Remove SIGALRM */
277 (void)sigsuspend(&sigmask); /* Until SIGALRM */
278 (void)sigprocmask(SIG_SETMASK, &old_sigmask, NULL); /* Restore mask */
279 }
280
281
282
283
284 /*************************************************
285 * Millisecond sleep function *
286 *************************************************/
287
288 /* The basic sleep() function has a granularity of 1 second, which is too rough
289 in some cases - for example, when using an increasing delay to slow down
290 spammers.
291
292 Argument: number of millseconds
293 Returns: nothing
294 */
295
296 void
297 millisleep(int msec)
298 {
299 struct itimerval itval;
300 itval.it_interval.tv_sec = 0;
301 itval.it_interval.tv_usec = 0;
302 itval.it_value.tv_sec = msec/1000;
303 itval.it_value.tv_usec = (msec % 1000) * 1000;
304 milliwait(&itval);
305 }
306
307
308
309 /*************************************************
310 * Compare microsecond times *
311 *************************************************/
312
313 /*
314 Arguments:
315 tv1 the first time
316 tv2 the second time
317
318 Returns: -1, 0, or +1
319 */
320
321 int
322 exim_tvcmp(struct timeval *t1, struct timeval *t2)
323 {
324 if (t1->tv_sec > t2->tv_sec) return +1;
325 if (t1->tv_sec < t2->tv_sec) return -1;
326 if (t1->tv_usec > t2->tv_usec) return +1;
327 if (t1->tv_usec < t2->tv_usec) return -1;
328 return 0;
329 }
330
331
332
333
334 /*************************************************
335 * Clock tick wait function *
336 *************************************************/
337
338 /* Exim uses a time + a pid to generate a unique identifier in two places: its
339 message IDs, and in file names for maildir deliveries. Because some OS now
340 re-use pids within the same second, sub-second times are now being used.
341 However, for absolute certaintly, we must ensure the clock has ticked before
342 allowing the relevant process to complete. At the time of implementation of
343 this code (February 2003), the speed of processors is such that the clock will
344 invariably have ticked already by the time a process has done its job. This
345 function prepares for the time when things are faster - and it also copes with
346 clocks that go backwards.
347
348 Arguments:
349 then_tv A timeval which was used to create uniqueness; its usec field
350 has been rounded down to the value of the resolution.
351 We want to be sure the current time is greater than this.
352 resolution The resolution that was used to divide the microseconds
353 (1 for maildir, larger for message ids)
354
355 Returns: nothing
356 */
357
358 void
359 exim_wait_tick(struct timeval *then_tv, int resolution)
360 {
361 struct timeval now_tv;
362 long int now_true_usec;
363
364 (void)gettimeofday(&now_tv, NULL);
365 now_true_usec = now_tv.tv_usec;
366 now_tv.tv_usec = (now_true_usec/resolution) * resolution;
367
368 if (exim_tvcmp(&now_tv, then_tv) <= 0)
369 {
370 struct itimerval itval;
371 itval.it_interval.tv_sec = 0;
372 itval.it_interval.tv_usec = 0;
373 itval.it_value.tv_sec = then_tv->tv_sec - now_tv.tv_sec;
374 itval.it_value.tv_usec = then_tv->tv_usec + resolution - now_true_usec;
375
376 /* We know that, overall, "now" is less than or equal to "then". Therefore, a
377 negative value for the microseconds is possible only in the case when "now"
378 is more than a second less than "then". That means that itval.it_value.tv_sec
379 is greater than zero. The following correction is therefore safe. */
380
381 if (itval.it_value.tv_usec < 0)
382 {
383 itval.it_value.tv_usec += 1000000;
384 itval.it_value.tv_sec -= 1;
385 }
386
387 DEBUG(D_transport|D_receive)
388 {
389 if (!running_in_test_harness)
390 {
391 debug_printf("tick check: %lu.%06lu %lu.%06lu\n",
392 then_tv->tv_sec, then_tv->tv_usec, now_tv.tv_sec, now_tv.tv_usec);
393 debug_printf("waiting %lu.%06lu\n", itval.it_value.tv_sec,
394 itval.it_value.tv_usec);
395 }
396 }
397
398 milliwait(&itval);
399 }
400 }
401
402
403
404
405 /*************************************************
406 * Call fopen() with umask 777 and adjust mode *
407 *************************************************/
408
409 /* Exim runs with umask(0) so that files created with open() have the mode that
410 is specified in the open() call. However, there are some files, typically in
411 the spool directory, that are created with fopen(). They end up world-writeable
412 if no precautions are taken. Although the spool directory is not accessible to
413 the world, this is an untidiness. So this is a wrapper function for fopen()
414 that sorts out the mode of the created file.
415
416 Arguments:
417 filename the file name
418 options the fopen() options
419 mode the required mode
420
421 Returns: the fopened FILE or NULL
422 */
423
424 FILE *
425 modefopen(const uschar *filename, const char *options, mode_t mode)
426 {
427 mode_t saved_umask = umask(0777);
428 FILE *f = Ufopen(filename, options);
429 (void)umask(saved_umask);
430 if (f != NULL) (void)fchmod(fileno(f), mode);
431 return f;
432 }
433
434
435
436
437 /*************************************************
438 * Ensure stdin, stdout, and stderr exist *
439 *************************************************/
440
441 /* Some operating systems grumble if an exec() happens without a standard
442 input, output, and error (fds 0, 1, 2) being defined. The worry is that some
443 file will be opened and will use these fd values, and then some other bit of
444 code will assume, for example, that it can write error messages to stderr.
445 This function ensures that fds 0, 1, and 2 are open if they do not already
446 exist, by connecting them to /dev/null.
447
448 This function is also used to ensure that std{in,out,err} exist at all times,
449 so that if any library that Exim calls tries to use them, it doesn't crash.
450
451 Arguments: None
452 Returns: Nothing
453 */
454
455 void
456 exim_nullstd(void)
457 {
458 int i;
459 int devnull = -1;
460 struct stat statbuf;
461 for (i = 0; i <= 2; i++)
462 {
463 if (fstat(i, &statbuf) < 0 && errno == EBADF)
464 {
465 if (devnull < 0) devnull = open("/dev/null", O_RDWR);
466 if (devnull < 0) log_write(0, LOG_MAIN|LOG_PANIC_DIE, "%s",
467 string_open_failed(errno, "/dev/null"));
468 if (devnull != i) (void)dup2(devnull, i);
469 }
470 }
471 if (devnull > 2) (void)close(devnull);
472 }
473
474
475
476
477 /*************************************************
478 * Close unwanted file descriptors for delivery *
479 *************************************************/
480
481 /* This function is called from a new process that has been forked to deliver
482 an incoming message, either directly, or using exec.
483
484 We want any smtp input streams to be closed in this new process. However, it
485 has been observed that using fclose() here causes trouble. When reading in -bS
486 input, duplicate copies of messages have been seen. The files will be sharing a
487 file pointer with the parent process, and it seems that fclose() (at least on
488 some systems - I saw this on Solaris 2.5.1) messes with that file pointer, at
489 least sometimes. Hence we go for closing the underlying file descriptors.
490
491 If TLS is active, we want to shut down the TLS library, but without molesting
492 the parent's SSL connection.
493
494 For delivery of a non-SMTP message, we want to close stdin and stdout (and
495 stderr unless debugging) because the calling process might have set them up as
496 pipes and be waiting for them to close before it waits for the submission
497 process to terminate. If they aren't closed, they hold up the calling process
498 until the initial delivery process finishes, which is not what we want.
499
500 Exception: We do want it for synchronous delivery!
501
502 And notwithstanding all the above, if D_resolver is set, implying resolver
503 debugging, leave stdout open, because that's where the resolver writes its
504 debugging output.
505
506 When we close stderr (which implies we've also closed stdout), we also get rid
507 of any controlling terminal.
508
509 Arguments: None
510 Returns: Nothing
511 */
512
513 static void
514 close_unwanted(void)
515 {
516 if (smtp_input)
517 {
518 #ifdef SUPPORT_TLS
519 tls_close(FALSE); /* Shut down the TLS library */
520 #endif
521 (void)close(fileno(smtp_in));
522 (void)close(fileno(smtp_out));
523 smtp_in = NULL;
524 }
525 else
526 {
527 (void)close(0); /* stdin */
528 if ((debug_selector & D_resolver) == 0) (void)close(1); /* stdout */
529 if (debug_selector == 0) /* stderr */
530 {
531 if (!synchronous_delivery)
532 {
533 (void)close(2);
534 log_stderr = NULL;
535 }
536 (void)setsid();
537 }
538 }
539 }
540
541
542
543
544 /*************************************************
545 * Set uid and gid *
546 *************************************************/
547
548 /* This function sets a new uid and gid permanently, optionally calling
549 initgroups() to set auxiliary groups. There are some special cases when running
550 Exim in unprivileged modes. In these situations the effective uid will not be
551 root; if we already have the right effective uid/gid, and don't need to
552 initialize any groups, leave things as they are.
553
554 Arguments:
555 uid the uid
556 gid the gid
557 igflag TRUE if initgroups() wanted
558 msg text to use in debugging output and failure log
559
560 Returns: nothing; bombs out on failure
561 */
562
563 void
564 exim_setugid(uid_t uid, gid_t gid, BOOL igflag, uschar *msg)
565 {
566 uid_t euid = geteuid();
567 gid_t egid = getegid();
568
569 if (euid == root_uid || euid != uid || egid != gid || igflag)
570 {
571 /* At least one OS returns +1 for initgroups failure, so just check for
572 non-zero. */
573
574 if (igflag)
575 {
576 struct passwd *pw = getpwuid(uid);
577 if (pw != NULL)
578 {
579 if (initgroups(pw->pw_name, gid) != 0)
580 log_write(0,LOG_MAIN|LOG_PANIC_DIE,"initgroups failed for uid=%ld: %s",
581 (long int)uid, strerror(errno));
582 }
583 else log_write(0, LOG_MAIN|LOG_PANIC_DIE, "cannot run initgroups(): "
584 "no passwd entry for uid=%ld", (long int)uid);
585 }
586
587 if (setgid(gid) < 0 || setuid(uid) < 0)
588 {
589 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "unable to set gid=%ld or uid=%ld "
590 "(euid=%ld): %s", (long int)gid, (long int)uid, (long int)euid, msg);
591 }
592 }
593
594 /* Debugging output included uid/gid and all groups */
595
596 DEBUG(D_uid)
597 {
598 int group_count, save_errno;
599 gid_t group_list[NGROUPS_MAX];
600 debug_printf("changed uid/gid: %s\n uid=%ld gid=%ld pid=%ld\n", msg,
601 (long int)geteuid(), (long int)getegid(), (long int)getpid());
602 group_count = getgroups(NGROUPS_MAX, group_list);
603 save_errno = errno;
604 debug_printf(" auxiliary group list:");
605 if (group_count > 0)
606 {
607 int i;
608 for (i = 0; i < group_count; i++) debug_printf(" %d", (int)group_list[i]);
609 }
610 else if (group_count < 0)
611 debug_printf(" <error: %s>", strerror(save_errno));
612 else debug_printf(" <none>");
613 debug_printf("\n");
614 }
615 }
616
617
618
619
620 /*************************************************
621 * Exit point *
622 *************************************************/
623
624 /* Exim exits via this function so that it always clears up any open
625 databases.
626
627 Arguments:
628 rc return code
629
630 Returns: does not return
631 */
632
633 void
634 exim_exit(int rc)
635 {
636 search_tidyup();
637 DEBUG(D_any)
638 debug_printf(">>>>>>>>>>>>>>>> Exim pid=%d terminating with rc=%d "
639 ">>>>>>>>>>>>>>>>\n", (int)getpid(), rc);
640 exit(rc);
641 }
642
643
644
645
646 /*************************************************
647 * Extract port from host address *
648 *************************************************/
649
650 /* Called to extract the port from the values given to -oMa and -oMi.
651 It also checks the syntax of the address, and terminates it before the
652 port data when a port is extracted.
653
654 Argument:
655 address the address, with possible port on the end
656
657 Returns: the port, or zero if there isn't one
658 bombs out on a syntax error
659 */
660
661 static int
662 check_port(uschar *address)
663 {
664 int port = host_address_extract_port(address);
665 if (string_is_ip_address(address, NULL) == 0)
666 {
667 fprintf(stderr, "exim abandoned: \"%s\" is not an IP address\n", address);
668 exit(EXIT_FAILURE);
669 }
670 return port;
671 }
672
673
674
675 /*************************************************
676 * Test/verify an address *
677 *************************************************/
678
679 /* This function is called by the -bv and -bt code. It extracts a working
680 address from a full RFC 822 address. This isn't really necessary per se, but it
681 has the effect of collapsing source routes.
682
683 Arguments:
684 s the address string
685 flags flag bits for verify_address()
686 exit_value to be set for failures
687
688 Returns: nothing
689 */
690
691 static void
692 test_address(uschar *s, int flags, int *exit_value)
693 {
694 int start, end, domain;
695 uschar *parse_error = NULL;
696 uschar *address = parse_extract_address(s, &parse_error, &start, &end, &domain,
697 FALSE);
698 if (address == NULL)
699 {
700 fprintf(stdout, "syntax error: %s\n", parse_error);
701 *exit_value = 2;
702 }
703 else
704 {
705 int rc = verify_address(deliver_make_addr(address,TRUE), stdout, flags, -1,
706 -1, -1, NULL, NULL, NULL);
707 if (rc == FAIL) *exit_value = 2;
708 else if (rc == DEFER && *exit_value == 0) *exit_value = 1;
709 }
710 }
711
712
713
714 /*************************************************
715 * Show supported features *
716 *************************************************/
717
718 /* This function is called for -bV/--version and for -d to output the optional
719 features of the current Exim binary.
720
721 Arguments: a FILE for printing
722 Returns: nothing
723 */
724
725 static void
726 show_whats_supported(FILE *f)
727 {
728 auth_info *authi;
729
730 #ifdef DB_VERSION_STRING
731 fprintf(f, "Berkeley DB: %s\n", DB_VERSION_STRING);
732 #elif defined(BTREEVERSION) && defined(HASHVERSION)
733 #ifdef USE_DB
734 fprintf(f, "Probably Berkeley DB version 1.8x (native mode)\n");
735 #else
736 fprintf(f, "Probably Berkeley DB version 1.8x (compatibility mode)\n");
737 #endif
738 #elif defined(_DBM_RDONLY) || defined(dbm_dirfno)
739 fprintf(f, "Probably ndbm\n");
740 #elif defined(USE_TDB)
741 fprintf(f, "Using tdb\n");
742 #else
743 #ifdef USE_GDBM
744 fprintf(f, "Probably GDBM (native mode)\n");
745 #else
746 fprintf(f, "Probably GDBM (compatibility mode)\n");
747 #endif
748 #endif
749
750 fprintf(f, "Support for:");
751 #ifdef SUPPORT_CRYPTEQ
752 fprintf(f, " crypteq");
753 #endif
754 #if HAVE_ICONV
755 fprintf(f, " iconv()");
756 #endif
757 #if HAVE_IPV6
758 fprintf(f, " IPv6");
759 #endif
760 #ifdef HAVE_SETCLASSRESOURCES
761 fprintf(f, " use_setclassresources");
762 #endif
763 #ifdef SUPPORT_PAM
764 fprintf(f, " PAM");
765 #endif
766 #ifdef EXIM_PERL
767 fprintf(f, " Perl");
768 #endif
769 #ifdef EXPAND_DLFUNC
770 fprintf(f, " Expand_dlfunc");
771 #endif
772 #ifdef USE_TCP_WRAPPERS
773 fprintf(f, " TCPwrappers");
774 #endif
775 #ifdef SUPPORT_TLS
776 #ifdef USE_GNUTLS
777 fprintf(f, " GnuTLS");
778 #else
779 fprintf(f, " OpenSSL");
780 #endif
781 #endif
782 #ifdef SUPPORT_TRANSLATE_IP_ADDRESS
783 fprintf(f, " translate_ip_address");
784 #endif
785 #ifdef SUPPORT_MOVE_FROZEN_MESSAGES
786 fprintf(f, " move_frozen_messages");
787 #endif
788 #ifdef WITH_CONTENT_SCAN
789 fprintf(f, " Content_Scanning");
790 #endif
791 #ifndef DISABLE_DKIM
792 fprintf(f, " DKIM");
793 #endif
794 #ifdef WITH_OLD_DEMIME
795 fprintf(f, " Old_Demime");
796 #endif
797 #ifdef EXPERIMENTAL_SPF
798 fprintf(f, " Experimental_SPF");
799 #endif
800 #ifdef EXPERIMENTAL_SRS
801 fprintf(f, " Experimental_SRS");
802 #endif
803 #ifdef EXPERIMENTAL_BRIGHTMAIL
804 fprintf(f, " Experimental_Brightmail");
805 #endif
806 #ifdef EXPERIMENTAL_DCC
807 fprintf(f, " Experimental_DCC");
808 #endif
809 fprintf(f, "\n");
810
811 fprintf(f, "Lookups (built-in):");
812 #if defined(LOOKUP_LSEARCH) && LOOKUP_LSEARCH!=2
813 fprintf(f, " lsearch wildlsearch nwildlsearch iplsearch");
814 #endif
815 #if defined(LOOKUP_CDB) && LOOKUP_CDB!=2
816 fprintf(f, " cdb");
817 #endif
818 #if defined(LOOKUP_DBM) && LOOKUP_DBM!=2
819 fprintf(f, " dbm dbmjz dbmnz");
820 #endif
821 #if defined(LOOKUP_DNSDB) && LOOKUP_DNSDB!=2
822 fprintf(f, " dnsdb");
823 #endif
824 #if defined(LOOKUP_DSEARCH) && LOOKUP_DSEARCH!=2
825 fprintf(f, " dsearch");
826 #endif
827 #if defined(LOOKUP_IBASE) && LOOKUP_IBASE!=2
828 fprintf(f, " ibase");
829 #endif
830 #if defined(LOOKUP_LDAP) && LOOKUP_LDAP!=2
831 fprintf(f, " ldap ldapdn ldapm");
832 #endif
833 #if defined(LOOKUP_MYSQL) && LOOKUP_MYSQL!=2
834 fprintf(f, " mysql");
835 #endif
836 #if defined(LOOKUP_NIS) && LOOKUP_NIS!=2
837 fprintf(f, " nis nis0");
838 #endif
839 #if defined(LOOKUP_NISPLUS) && LOOKUP_NISPLUS!=2
840 fprintf(f, " nisplus");
841 #endif
842 #if defined(LOOKUP_ORACLE) && LOOKUP_ORACLE!=2
843 fprintf(f, " oracle");
844 #endif
845 #if defined(LOOKUP_PASSWD) && LOOKUP_PASSWD!=2
846 fprintf(f, " passwd");
847 #endif
848 #if defined(LOOKUP_PGSQL) && LOOKUP_PGSQL!=2
849 fprintf(f, " pgsql");
850 #endif
851 #if defined(LOOKUP_SQLITE) && LOOKUP_SQLITE!=2
852 fprintf(f, " sqlite");
853 #endif
854 #if defined(LOOKUP_TESTDB) && LOOKUP_TESTDB!=2
855 fprintf(f, " testdb");
856 #endif
857 #if defined(LOOKUP_WHOSON) && LOOKUP_WHOSON!=2
858 fprintf(f, " whoson");
859 #endif
860 fprintf(f, "\n");
861
862 fprintf(f, "Authenticators:");
863 #ifdef AUTH_CRAM_MD5
864 fprintf(f, " cram_md5");
865 #endif
866 #ifdef AUTH_CYRUS_SASL
867 fprintf(f, " cyrus_sasl");
868 #endif
869 #ifdef AUTH_DOVECOT
870 fprintf(f, " dovecot");
871 #endif
872 #ifdef AUTH_GSASL
873 fprintf(f, " gsasl");
874 #endif
875 #ifdef AUTH_HEIMDAL_GSSAPI
876 fprintf(f, " heimdal_gssapi");
877 #endif
878 #ifdef AUTH_PLAINTEXT
879 fprintf(f, " plaintext");
880 #endif
881 #ifdef AUTH_SPA
882 fprintf(f, " spa");
883 #endif
884 fprintf(f, "\n");
885
886 fprintf(f, "Routers:");
887 #ifdef ROUTER_ACCEPT
888 fprintf(f, " accept");
889 #endif
890 #ifdef ROUTER_DNSLOOKUP
891 fprintf(f, " dnslookup");
892 #endif
893 #ifdef ROUTER_IPLITERAL
894 fprintf(f, " ipliteral");
895 #endif
896 #ifdef ROUTER_IPLOOKUP
897 fprintf(f, " iplookup");
898 #endif
899 #ifdef ROUTER_MANUALROUTE
900 fprintf(f, " manualroute");
901 #endif
902 #ifdef ROUTER_QUERYPROGRAM
903 fprintf(f, " queryprogram");
904 #endif
905 #ifdef ROUTER_REDIRECT
906 fprintf(f, " redirect");
907 #endif
908 fprintf(f, "\n");
909
910 fprintf(f, "Transports:");
911 #ifdef TRANSPORT_APPENDFILE
912 fprintf(f, " appendfile");
913 #ifdef SUPPORT_MAILDIR
914 fprintf(f, "/maildir");
915 #endif
916 #ifdef SUPPORT_MAILSTORE
917 fprintf(f, "/mailstore");
918 #endif
919 #ifdef SUPPORT_MBX
920 fprintf(f, "/mbx");
921 #endif
922 #endif
923 #ifdef TRANSPORT_AUTOREPLY
924 fprintf(f, " autoreply");
925 #endif
926 #ifdef TRANSPORT_LMTP
927 fprintf(f, " lmtp");
928 #endif
929 #ifdef TRANSPORT_PIPE
930 fprintf(f, " pipe");
931 #endif
932 #ifdef TRANSPORT_SMTP
933 fprintf(f, " smtp");
934 #endif
935 fprintf(f, "\n");
936
937 if (fixed_never_users[0] > 0)
938 {
939 int i;
940 fprintf(f, "Fixed never_users: ");
941 for (i = 1; i <= (int)fixed_never_users[0] - 1; i++)
942 fprintf(f, "%d:", (unsigned int)fixed_never_users[i]);
943 fprintf(f, "%d\n", (unsigned int)fixed_never_users[i]);
944 }
945
946 fprintf(f, "Size of off_t: " SIZE_T_FMT "\n", sizeof(off_t));
947
948 /* Everything else is details which are only worth reporting when debugging.
949 Perhaps the tls_version_report should move into this too. */
950 DEBUG(D_any) do {
951
952 int i;
953
954 /* clang defines __GNUC__ (at least, for me) so test for it first */
955 #if defined(__clang__)
956 fprintf(f, "Compiler: CLang [%s]\n", __clang_version__);
957 #elif defined(__GNUC__)
958 fprintf(f, "Compiler: GCC [%s]\n",
959 # ifdef __VERSION__
960 __VERSION__
961 # else
962 "? unknown version ?"
963 # endif
964 );
965 #else
966 fprintf(f, "Compiler: <unknown>\n");
967 #endif
968
969 #ifdef SUPPORT_TLS
970 tls_version_report(f);
971 #endif
972
973 for (authi = auths_available; *authi->driver_name != '\0'; ++authi) {
974 if (authi->version_report) {
975 (*authi->version_report)(f);
976 }
977 }
978
979 fprintf(f, "Library version: PCRE: Compile: %d.%d%s\n"
980 " Runtime: %s\n",
981 PCRE_MAJOR, PCRE_MINOR,
982 /* PRE_PRERELEASE is either defined and empty or a string.
983 * unless its an ancient version of PCRE in which case it
984 * is not defined */
985 #ifdef PCRE_PRERELEASE
986 # define STRINGIFY(x) #x
987 STRINGIFY(PCRE_PRERELEASE) "",
988 # undef STRINGIFY
989 #else
990 "",
991 #endif
992 pcre_version());
993
994 init_lookup_list();
995 for (i = 0; i < lookup_list_count; i++)
996 {
997 if (lookup_list[i]->version_report)
998 lookup_list[i]->version_report(f);
999 }
1000
1001 #ifdef WHITELIST_D_MACROS
1002 fprintf(f, "WHITELIST_D_MACROS: \"%s\"\n", WHITELIST_D_MACROS);
1003 #else
1004 fprintf(f, "WHITELIST_D_MACROS unset\n");
1005 #endif
1006 #ifdef TRUSTED_CONFIG_LIST
1007 fprintf(f, "TRUSTED_CONFIG_LIST: \"%s\"\n", TRUSTED_CONFIG_LIST);
1008 #else
1009 fprintf(f, "TRUSTED_CONFIG_LIST unset\n");
1010 #endif
1011
1012 } while (0);
1013 }
1014
1015
1016
1017
1018 /*************************************************
1019 * Quote a local part *
1020 *************************************************/
1021
1022 /* This function is used when a sender address or a From: or Sender: header
1023 line is being created from the caller's login, or from an authenticated_id. It
1024 applies appropriate quoting rules for a local part.
1025
1026 Argument: the local part
1027 Returns: the local part, quoted if necessary
1028 */
1029
1030 uschar *
1031 local_part_quote(uschar *lpart)
1032 {
1033 BOOL needs_quote = FALSE;
1034 int size, ptr;
1035 uschar *yield;
1036 uschar *t;
1037
1038 for (t = lpart; !needs_quote && *t != 0; t++)
1039 {
1040 needs_quote = !isalnum(*t) && strchr("!#$%&'*+-/=?^_`{|}~", *t) == NULL &&
1041 (*t != '.' || t == lpart || t[1] == 0);
1042 }
1043
1044 if (!needs_quote) return lpart;
1045
1046 size = ptr = 0;
1047 yield = string_cat(NULL, &size, &ptr, US"\"", 1);
1048
1049 for (;;)
1050 {
1051 uschar *nq = US Ustrpbrk(lpart, "\\\"");
1052 if (nq == NULL)
1053 {
1054 yield = string_cat(yield, &size, &ptr, lpart, Ustrlen(lpart));
1055 break;
1056 }
1057 yield = string_cat(yield, &size, &ptr, lpart, nq - lpart);
1058 yield = string_cat(yield, &size, &ptr, US"\\", 1);
1059 yield = string_cat(yield, &size, &ptr, nq, 1);
1060 lpart = nq + 1;
1061 }
1062
1063 yield = string_cat(yield, &size, &ptr, US"\"", 1);
1064 yield[ptr] = 0;
1065 return yield;
1066 }
1067
1068
1069
1070 #ifdef USE_READLINE
1071 /*************************************************
1072 * Load readline() functions *
1073 *************************************************/
1074
1075 /* This function is called from testing executions that read data from stdin,
1076 but only when running as the calling user. Currently, only -be does this. The
1077 function loads the readline() function library and passes back the functions.
1078 On some systems, it needs the curses library, so load that too, but try without
1079 it if loading fails. All this functionality has to be requested at build time.
1080
1081 Arguments:
1082 fn_readline_ptr pointer to where to put the readline pointer
1083 fn_addhist_ptr pointer to where to put the addhistory function
1084
1085 Returns: the dlopen handle or NULL on failure
1086 */
1087
1088 static void *
1089 set_readline(char * (**fn_readline_ptr)(const char *),
1090 void (**fn_addhist_ptr)(const char *))
1091 {
1092 void *dlhandle;
1093 void *dlhandle_curses = dlopen("libcurses." DYNLIB_FN_EXT, RTLD_GLOBAL|RTLD_LAZY);
1094
1095 dlhandle = dlopen("libreadline." DYNLIB_FN_EXT, RTLD_GLOBAL|RTLD_NOW);
1096 if (dlhandle_curses != NULL) dlclose(dlhandle_curses);
1097
1098 if (dlhandle != NULL)
1099 {
1100 /* Checked manual pages; at least in GNU Readline 6.1, the prototypes are:
1101 * char * readline (const char *prompt);
1102 * void add_history (const char *string);
1103 */
1104 *fn_readline_ptr = (char *(*)(const char*))dlsym(dlhandle, "readline");
1105 *fn_addhist_ptr = (void(*)(const char*))dlsym(dlhandle, "add_history");
1106 }
1107 else
1108 {
1109 DEBUG(D_any) debug_printf("failed to load readline: %s\n", dlerror());
1110 }
1111
1112 return dlhandle;
1113 }
1114 #endif
1115
1116
1117
1118 /*************************************************
1119 * Get a line from stdin for testing things *
1120 *************************************************/
1121
1122 /* This function is called when running tests that can take a number of lines
1123 of input (for example, -be and -bt). It handles continuations and trailing
1124 spaces. And prompting and a blank line output on eof. If readline() is in use,
1125 the arguments are non-NULL and provide the relevant functions.
1126
1127 Arguments:
1128 fn_readline readline function or NULL
1129 fn_addhist addhist function or NULL
1130
1131 Returns: pointer to dynamic memory, or NULL at end of file
1132 */
1133
1134 static uschar *
1135 get_stdinput(char *(*fn_readline)(const char *), void(*fn_addhist)(const char *))
1136 {
1137 int i;
1138 int size = 0;
1139 int ptr = 0;
1140 uschar *yield = NULL;
1141
1142 if (fn_readline == NULL) { printf("> "); fflush(stdout); }
1143
1144 for (i = 0;; i++)
1145 {
1146 uschar buffer[1024];
1147 uschar *p, *ss;
1148
1149 #ifdef USE_READLINE
1150 char *readline_line = NULL;
1151 if (fn_readline != NULL)
1152 {
1153 if ((readline_line = fn_readline((i > 0)? "":"> ")) == NULL) break;
1154 if (*readline_line != 0 && fn_addhist != NULL) fn_addhist(readline_line);
1155 p = US readline_line;
1156 }
1157 else
1158 #endif
1159
1160 /* readline() not in use */
1161
1162 {
1163 if (Ufgets(buffer, sizeof(buffer), stdin) == NULL) break;
1164 p = buffer;
1165 }
1166
1167 /* Handle the line */
1168
1169 ss = p + (int)Ustrlen(p);
1170 while (ss > p && isspace(ss[-1])) ss--;
1171
1172 if (i > 0)
1173 {
1174 while (p < ss && isspace(*p)) p++; /* leading space after cont */
1175 }
1176
1177 yield = string_cat(yield, &size, &ptr, p, ss - p);
1178
1179 #ifdef USE_READLINE
1180 if (fn_readline != NULL) free(readline_line);
1181 #endif
1182
1183 if (ss == p || yield[ptr-1] != '\\')
1184 {
1185 yield[ptr] = 0;
1186 break;
1187 }
1188 yield[--ptr] = 0;
1189 }
1190
1191 if (yield == NULL) printf("\n");
1192 return yield;
1193 }
1194
1195
1196
1197 /*************************************************
1198 * Output usage information for the program *
1199 *************************************************/
1200
1201 /* This function is called when there are no recipients
1202 or a specific --help argument was added.
1203
1204 Arguments:
1205 progname information on what name we were called by
1206
1207 Returns: DOES NOT RETURN
1208 */
1209
1210 static void
1211 exim_usage(uschar *progname)
1212 {
1213
1214 /* Handle specific program invocation varients */
1215 if (Ustrcmp(progname, US"-mailq") == 0)
1216 {
1217 fprintf(stderr,
1218 "mailq - list the contents of the mail queue\n\n"
1219 "For a list of options, see the Exim documentation.\n");
1220 exit(EXIT_FAILURE);
1221 }
1222
1223 /* Generic usage - we output this whatever happens */
1224 fprintf(stderr,
1225 "Exim is a Mail Transfer Agent. It is normally called by Mail User Agents,\n"
1226 "not directly from a shell command line. Options and/or arguments control\n"
1227 "what it does when called. For a list of options, see the Exim documentation.\n");
1228
1229 exit(EXIT_FAILURE);
1230 }
1231
1232
1233
1234 /*************************************************
1235 * Validate that the macros given are okay *
1236 *************************************************/
1237
1238 /* Typically, Exim will drop privileges if macros are supplied. In some
1239 cases, we want to not do so.
1240
1241 Arguments: none (macros is a global)
1242 Returns: true if trusted, false otherwise
1243 */
1244
1245 static BOOL
1246 macros_trusted(void)
1247 {
1248 #ifdef WHITELIST_D_MACROS
1249 macro_item *m;
1250 uschar *whitelisted, *end, *p, **whites, **w;
1251 int white_count, i, n;
1252 size_t len;
1253 BOOL prev_char_item, found;
1254 #endif
1255
1256 if (macros == NULL)
1257 return TRUE;
1258 #ifndef WHITELIST_D_MACROS
1259 return FALSE;
1260 #else
1261
1262 /* We only trust -D overrides for some invoking users:
1263 root, the exim run-time user, the optional config owner user.
1264 I don't know why config-owner would be needed, but since they can own the
1265 config files anyway, there's no security risk to letting them override -D. */
1266 if ( ! ((real_uid == root_uid)
1267 || (real_uid == exim_uid)
1268 #ifdef CONFIGURE_OWNER
1269 || (real_uid == config_uid)
1270 #endif
1271 ))
1272 {
1273 debug_printf("macros_trusted rejecting macros for uid %d\n", (int) real_uid);
1274 return FALSE;
1275 }
1276
1277 /* Get a list of macros which are whitelisted */
1278 whitelisted = string_copy_malloc(US WHITELIST_D_MACROS);
1279 prev_char_item = FALSE;
1280 white_count = 0;
1281 for (p = whitelisted; *p != '\0'; ++p)
1282 {
1283 if (*p == ':' || isspace(*p))
1284 {
1285 *p = '\0';
1286 if (prev_char_item)
1287 ++white_count;
1288 prev_char_item = FALSE;
1289 continue;
1290 }
1291 if (!prev_char_item)
1292 prev_char_item = TRUE;
1293 }
1294 end = p;
1295 if (prev_char_item)
1296 ++white_count;
1297 if (!white_count)
1298 return FALSE;
1299 whites = store_malloc(sizeof(uschar *) * (white_count+1));
1300 for (p = whitelisted, i = 0; (p != end) && (i < white_count); ++p)
1301 {
1302 if (*p != '\0')
1303 {
1304 whites[i++] = p;
1305 if (i == white_count)
1306 break;
1307 while (*p != '\0' && p < end)
1308 ++p;
1309 }
1310 }
1311 whites[i] = NULL;
1312
1313 /* The list of macros should be very short. Accept the N*M complexity. */
1314 for (m = macros; m != NULL; m = m->next)
1315 {
1316 found = FALSE;
1317 for (w = whites; *w; ++w)
1318 if (Ustrcmp(*w, m->name) == 0)
1319 {
1320 found = TRUE;
1321 break;
1322 }
1323 if (!found)
1324 return FALSE;
1325 if (m->replacement == NULL)
1326 continue;
1327 len = Ustrlen(m->replacement);
1328 if (len == 0)
1329 continue;
1330 n = pcre_exec(regex_whitelisted_macro, NULL, CS m->replacement, len,
1331 0, PCRE_EOPT, NULL, 0);
1332 if (n < 0)
1333 {
1334 if (n != PCRE_ERROR_NOMATCH)
1335 debug_printf("macros_trusted checking %s returned %d\n", m->name, n);
1336 return FALSE;
1337 }
1338 }
1339 DEBUG(D_any) debug_printf("macros_trusted overridden to true by whitelisting\n");
1340 return TRUE;
1341 #endif
1342 }
1343
1344
1345 /*************************************************
1346 * Entry point and high-level code *
1347 *************************************************/
1348
1349 /* Entry point for the Exim mailer. Analyse the arguments and arrange to take
1350 the appropriate action. All the necessary functions are present in the one
1351 binary. I originally thought one should split it up, but it turns out that so
1352 much of the apparatus is needed in each chunk that one might as well just have
1353 it all available all the time, which then makes the coding easier as well.
1354
1355 Arguments:
1356 argc count of entries in argv
1357 argv argument strings, with argv[0] being the program name
1358
1359 Returns: EXIT_SUCCESS if terminated successfully
1360 EXIT_FAILURE otherwise, except when a message has been sent
1361 to the sender, and -oee was given
1362 */
1363
1364 int
1365 main(int argc, char **cargv)
1366 {
1367 uschar **argv = USS cargv;
1368 int arg_receive_timeout = -1;
1369 int arg_smtp_receive_timeout = -1;
1370 int arg_error_handling = error_handling;
1371 int filter_sfd = -1;
1372 int filter_ufd = -1;
1373 int group_count;
1374 int i, rv;
1375 int list_queue_option = 0;
1376 int msg_action = 0;
1377 int msg_action_arg = -1;
1378 int namelen = (argv[0] == NULL)? 0 : Ustrlen(argv[0]);
1379 int queue_only_reason = 0;
1380 #ifdef EXIM_PERL
1381 int perl_start_option = 0;
1382 #endif
1383 int recipients_arg = argc;
1384 int sender_address_domain = 0;
1385 int test_retry_arg = -1;
1386 int test_rewrite_arg = -1;
1387 BOOL arg_queue_only = FALSE;
1388 BOOL bi_option = FALSE;
1389 BOOL checking = FALSE;
1390 BOOL count_queue = FALSE;
1391 BOOL expansion_test = FALSE;
1392 BOOL extract_recipients = FALSE;
1393 BOOL forced_delivery = FALSE;
1394 BOOL f_end_dot = FALSE;
1395 BOOL deliver_give_up = FALSE;
1396 BOOL list_queue = FALSE;
1397 BOOL list_options = FALSE;
1398 BOOL local_queue_only;
1399 BOOL more = TRUE;
1400 BOOL one_msg_action = FALSE;
1401 BOOL queue_only_set = FALSE;
1402 BOOL receiving_message = TRUE;
1403 BOOL sender_ident_set = FALSE;
1404 BOOL session_local_queue_only;
1405 BOOL unprivileged;
1406 BOOL removed_privilege = FALSE;
1407 BOOL usage_wanted = FALSE;
1408 BOOL verify_address_mode = FALSE;
1409 BOOL verify_as_sender = FALSE;
1410 BOOL version_printed = FALSE;
1411 uschar *alias_arg = NULL;
1412 uschar *called_as = US"";
1413 uschar *start_queue_run_id = NULL;
1414 uschar *stop_queue_run_id = NULL;
1415 uschar *expansion_test_message = NULL;
1416 uschar *ftest_domain = NULL;
1417 uschar *ftest_localpart = NULL;
1418 uschar *ftest_prefix = NULL;
1419 uschar *ftest_suffix = NULL;
1420 uschar *malware_test_file = NULL;
1421 uschar *real_sender_address;
1422 uschar *originator_home = US"/";
1423 void *reset_point;
1424
1425 struct passwd *pw;
1426 struct stat statbuf;
1427 pid_t passed_qr_pid = (pid_t)0;
1428 int passed_qr_pipe = -1;
1429 gid_t group_list[NGROUPS_MAX];
1430
1431 /* Possible options for -R and -S */
1432
1433 static uschar *rsopts[] = { US"f", US"ff", US"r", US"rf", US"rff" };
1434
1435 /* Need to define this in case we need to change the environment in order
1436 to get rid of a bogus time zone. We have to make it char rather than uschar
1437 because some OS define it in /usr/include/unistd.h. */
1438
1439 extern char **environ;
1440
1441 /* If the Exim user and/or group and/or the configuration file owner/group were
1442 defined by ref:name at build time, we must now find the actual uid/gid values.
1443 This is a feature to make the lives of binary distributors easier. */
1444
1445 #ifdef EXIM_USERNAME
1446 if (route_finduser(US EXIM_USERNAME, &pw, &exim_uid))
1447 {
1448 if (exim_uid == 0)
1449 {
1450 fprintf(stderr, "exim: refusing to run with uid 0 for \"%s\"\n",
1451 EXIM_USERNAME);
1452 exit(EXIT_FAILURE);
1453 }
1454 /* If ref:name uses a number as the name, route_finduser() returns
1455 TRUE with exim_uid set and pw coerced to NULL. */
1456 if (pw)
1457 exim_gid = pw->pw_gid;
1458 #ifndef EXIM_GROUPNAME
1459 else
1460 {
1461 fprintf(stderr,
1462 "exim: ref:name should specify a usercode, not a group.\n"
1463 "exim: can't let you get away with it unless you also specify a group.\n");
1464 exit(EXIT_FAILURE);
1465 }
1466 #endif
1467 }
1468 else
1469 {
1470 fprintf(stderr, "exim: failed to find uid for user name \"%s\"\n",
1471 EXIM_USERNAME);
1472 exit(EXIT_FAILURE);
1473 }
1474 #endif
1475
1476 #ifdef EXIM_GROUPNAME
1477 if (!route_findgroup(US EXIM_GROUPNAME, &exim_gid))
1478 {
1479 fprintf(stderr, "exim: failed to find gid for group name \"%s\"\n",
1480 EXIM_GROUPNAME);
1481 exit(EXIT_FAILURE);
1482 }
1483 #endif
1484
1485 #ifdef CONFIGURE_OWNERNAME
1486 if (!route_finduser(US CONFIGURE_OWNERNAME, NULL, &config_uid))
1487 {
1488 fprintf(stderr, "exim: failed to find uid for user name \"%s\"\n",
1489 CONFIGURE_OWNERNAME);
1490 exit(EXIT_FAILURE);
1491 }
1492 #endif
1493
1494 /* We default the system_filter_user to be the Exim run-time user, as a
1495 sane non-root value. */
1496 system_filter_uid = exim_uid;
1497
1498 #ifdef CONFIGURE_GROUPNAME
1499 if (!route_findgroup(US CONFIGURE_GROUPNAME, &config_gid))
1500 {
1501 fprintf(stderr, "exim: failed to find gid for group name \"%s\"\n",
1502 CONFIGURE_GROUPNAME);
1503 exit(EXIT_FAILURE);
1504 }
1505 #endif
1506
1507 /* In the Cygwin environment, some initialization needs doing. It is fudged
1508 in by means of this macro. */
1509
1510 #ifdef OS_INIT
1511 OS_INIT
1512 #endif
1513
1514 /* Check a field which is patched when we are running Exim within its
1515 testing harness; do a fast initial check, and then the whole thing. */
1516
1517 running_in_test_harness =
1518 *running_status == '<' && Ustrcmp(running_status, "<<<testing>>>") == 0;
1519
1520 /* The C standard says that the equivalent of setlocale(LC_ALL, "C") is obeyed
1521 at the start of a program; however, it seems that some environments do not
1522 follow this. A "strange" locale can affect the formatting of timestamps, so we
1523 make quite sure. */
1524
1525 setlocale(LC_ALL, "C");
1526
1527 /* Set up the default handler for timing using alarm(). */
1528
1529 os_non_restarting_signal(SIGALRM, sigalrm_handler);
1530
1531 /* Ensure we have a buffer for constructing log entries. Use malloc directly,
1532 because store_malloc writes a log entry on failure. */
1533
1534 log_buffer = (uschar *)malloc(LOG_BUFFER_SIZE);
1535 if (log_buffer == NULL)
1536 {
1537 fprintf(stderr, "exim: failed to get store for log buffer\n");
1538 exit(EXIT_FAILURE);
1539 }
1540
1541 /* Set log_stderr to stderr, provided that stderr exists. This gets reset to
1542 NULL when the daemon is run and the file is closed. We have to use this
1543 indirection, because some systems don't allow writing to the variable "stderr".
1544 */
1545
1546 if (fstat(fileno(stderr), &statbuf) >= 0) log_stderr = stderr;
1547
1548 /* Arrange for the PCRE regex library to use our store functions. Note that
1549 the normal calls are actually macros that add additional arguments for
1550 debugging purposes so we have to assign specially constructed functions here.
1551 The default is to use store in the stacking pool, but this is overridden in the
1552 regex_must_compile() function. */
1553
1554 pcre_malloc = function_store_get;
1555 pcre_free = function_dummy_free;
1556
1557 /* Ensure there is a big buffer for temporary use in several places. It is put
1558 in malloc store so that it can be freed for enlargement if necessary. */
1559
1560 big_buffer = store_malloc(big_buffer_size);
1561
1562 /* Set up the handler for the data request signal, and set the initial
1563 descriptive text. */
1564
1565 set_process_info("initializing");
1566 os_restarting_signal(SIGUSR1, usr1_handler);
1567
1568 /* SIGHUP is used to get the daemon to reconfigure. It gets set as appropriate
1569 in the daemon code. For the rest of Exim's uses, we ignore it. */
1570
1571 signal(SIGHUP, SIG_IGN);
1572
1573 /* We don't want to die on pipe errors as the code is written to handle
1574 the write error instead. */
1575
1576 signal(SIGPIPE, SIG_IGN);
1577
1578 /* Under some circumstance on some OS, Exim can get called with SIGCHLD
1579 set to SIG_IGN. This causes subprocesses that complete before the parent
1580 process waits for them not to hang around, so when Exim calls wait(), nothing
1581 is there. The wait() code has been made robust against this, but let's ensure
1582 that SIGCHLD is set to SIG_DFL, because it's tidier to wait and get a process
1583 ending status. We use sigaction rather than plain signal() on those OS where
1584 SA_NOCLDWAIT exists, because we want to be sure it is turned off. (There was a
1585 problem on AIX with this.) */
1586
1587 #ifdef SA_NOCLDWAIT
1588 {
1589 struct sigaction act;
1590 act.sa_handler = SIG_DFL;
1591 sigemptyset(&(act.sa_mask));
1592 act.sa_flags = 0;
1593 sigaction(SIGCHLD, &act, NULL);
1594 }
1595 #else
1596 signal(SIGCHLD, SIG_DFL);
1597 #endif
1598
1599 /* Save the arguments for use if we re-exec exim as a daemon after receiving
1600 SIGHUP. */
1601
1602 sighup_argv = argv;
1603
1604 /* Set up the version number. Set up the leading 'E' for the external form of
1605 message ids, set the pointer to the internal form, and initialize it to
1606 indicate no message being processed. */
1607
1608 version_init();
1609 message_id_option[0] = '-';
1610 message_id_external = message_id_option + 1;
1611 message_id_external[0] = 'E';
1612 message_id = message_id_external + 1;
1613 message_id[0] = 0;
1614
1615 /* Set the umask to zero so that any files Exim creates using open() are
1616 created with the modes that it specifies. NOTE: Files created with fopen() have
1617 a problem, which was not recognized till rather late (February 2006). With this
1618 umask, such files will be world writeable. (They are all content scanning files
1619 in the spool directory, which isn't world-accessible, so this is not a
1620 disaster, but it's untidy.) I don't want to change this overall setting,
1621 however, because it will interact badly with the open() calls. Instead, there's
1622 now a function called modefopen() that fiddles with the umask while calling
1623 fopen(). */
1624
1625 (void)umask(0);
1626
1627 /* Precompile the regular expression for matching a message id. Keep this in
1628 step with the code that generates ids in the accept.c module. We need to do
1629 this here, because the -M options check their arguments for syntactic validity
1630 using mac_ismsgid, which uses this. */
1631
1632 regex_ismsgid =
1633 regex_must_compile(US"^(?:[^\\W_]{6}-){2}[^\\W_]{2}$", FALSE, TRUE);
1634
1635 /* Precompile the regular expression that is used for matching an SMTP error
1636 code, possibly extended, at the start of an error message. Note that the
1637 terminating whitespace character is included. */
1638
1639 regex_smtp_code =
1640 regex_must_compile(US"^\\d\\d\\d\\s(?:\\d\\.\\d\\d?\\d?\\.\\d\\d?\\d?\\s)?",
1641 FALSE, TRUE);
1642
1643 #ifdef WHITELIST_D_MACROS
1644 /* Precompile the regular expression used to filter the content of macros
1645 given to -D for permissibility. */
1646
1647 regex_whitelisted_macro =
1648 regex_must_compile(US"^[A-Za-z0-9_/.-]*$", FALSE, TRUE);
1649 #endif
1650
1651
1652 /* If the program is called as "mailq" treat it as equivalent to "exim -bp";
1653 this seems to be a generally accepted convention, since one finds symbolic
1654 links called "mailq" in standard OS configurations. */
1655
1656 if ((namelen == 5 && Ustrcmp(argv[0], "mailq") == 0) ||
1657 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/mailq", 6) == 0))
1658 {
1659 list_queue = TRUE;
1660 receiving_message = FALSE;
1661 called_as = US"-mailq";
1662 }
1663
1664 /* If the program is called as "rmail" treat it as equivalent to
1665 "exim -i -oee", thus allowing UUCP messages to be input using non-SMTP mode,
1666 i.e. preventing a single dot on a line from terminating the message, and
1667 returning with zero return code, even in cases of error (provided an error
1668 message has been sent). */
1669
1670 if ((namelen == 5 && Ustrcmp(argv[0], "rmail") == 0) ||
1671 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/rmail", 6) == 0))
1672 {
1673 dot_ends = FALSE;
1674 called_as = US"-rmail";
1675 errors_sender_rc = EXIT_SUCCESS;
1676 }
1677
1678 /* If the program is called as "rsmtp" treat it as equivalent to "exim -bS";
1679 this is a smail convention. */
1680
1681 if ((namelen == 5 && Ustrcmp(argv[0], "rsmtp") == 0) ||
1682 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/rsmtp", 6) == 0))
1683 {
1684 smtp_input = smtp_batched_input = TRUE;
1685 called_as = US"-rsmtp";
1686 }
1687
1688 /* If the program is called as "runq" treat it as equivalent to "exim -q";
1689 this is a smail convention. */
1690
1691 if ((namelen == 4 && Ustrcmp(argv[0], "runq") == 0) ||
1692 (namelen > 4 && Ustrncmp(argv[0] + namelen - 5, "/runq", 5) == 0))
1693 {
1694 queue_interval = 0;
1695 receiving_message = FALSE;
1696 called_as = US"-runq";
1697 }
1698
1699 /* If the program is called as "newaliases" treat it as equivalent to
1700 "exim -bi"; this is a sendmail convention. */
1701
1702 if ((namelen == 10 && Ustrcmp(argv[0], "newaliases") == 0) ||
1703 (namelen > 10 && Ustrncmp(argv[0] + namelen - 11, "/newaliases", 11) == 0))
1704 {
1705 bi_option = TRUE;
1706 receiving_message = FALSE;
1707 called_as = US"-newaliases";
1708 }
1709
1710 /* Save the original effective uid for a couple of uses later. It should
1711 normally be root, but in some esoteric environments it may not be. */
1712
1713 original_euid = geteuid();
1714
1715 /* Get the real uid and gid. If the caller is root, force the effective uid/gid
1716 to be the same as the real ones. This makes a difference only if Exim is setuid
1717 (or setgid) to something other than root, which could be the case in some
1718 special configurations. */
1719
1720 real_uid = getuid();
1721 real_gid = getgid();
1722
1723 if (real_uid == root_uid)
1724 {
1725 rv = setgid(real_gid);
1726 if (rv)
1727 {
1728 fprintf(stderr, "exim: setgid(%ld) failed: %s\n",
1729 (long int)real_gid, strerror(errno));
1730 exit(EXIT_FAILURE);
1731 }
1732 rv = setuid(real_uid);
1733 if (rv)
1734 {
1735 fprintf(stderr, "exim: setuid(%ld) failed: %s\n",
1736 (long int)real_uid, strerror(errno));
1737 exit(EXIT_FAILURE);
1738 }
1739 }
1740
1741 /* If neither the original real uid nor the original euid was root, Exim is
1742 running in an unprivileged state. */
1743
1744 unprivileged = (real_uid != root_uid && original_euid != root_uid);
1745
1746 /* Scan the program's arguments. Some can be dealt with right away; others are
1747 simply recorded for checking and handling afterwards. Do a high-level switch
1748 on the second character (the one after '-'), to save some effort. */
1749
1750 for (i = 1; i < argc; i++)
1751 {
1752 BOOL badarg = FALSE;
1753 uschar *arg = argv[i];
1754 uschar *argrest;
1755 int switchchar;
1756
1757 /* An argument not starting with '-' is the start of a recipients list;
1758 break out of the options-scanning loop. */
1759
1760 if (arg[0] != '-')
1761 {
1762 recipients_arg = i;
1763 break;
1764 }
1765
1766 /* An option consistion of -- terminates the options */
1767
1768 if (Ustrcmp(arg, "--") == 0)
1769 {
1770 recipients_arg = i + 1;
1771 break;
1772 }
1773
1774 /* Handle flagged options */
1775
1776 switchchar = arg[1];
1777 argrest = arg+2;
1778
1779 /* Make all -ex options synonymous with -oex arguments, since that
1780 is assumed by various callers. Also make -qR options synonymous with -R
1781 options, as that seems to be required as well. Allow for -qqR too, and
1782 the same for -S options. */
1783
1784 if (Ustrncmp(arg+1, "oe", 2) == 0 ||
1785 Ustrncmp(arg+1, "qR", 2) == 0 ||
1786 Ustrncmp(arg+1, "qS", 2) == 0)
1787 {
1788 switchchar = arg[2];
1789 argrest++;
1790 }
1791 else if (Ustrncmp(arg+1, "qqR", 3) == 0 || Ustrncmp(arg+1, "qqS", 3) == 0)
1792 {
1793 switchchar = arg[3];
1794 argrest += 2;
1795 queue_2stage = TRUE;
1796 }
1797
1798 /* Make -r synonymous with -f, since it is a documented alias */
1799
1800 else if (arg[1] == 'r') switchchar = 'f';
1801
1802 /* Make -ov synonymous with -v */
1803
1804 else if (Ustrcmp(arg, "-ov") == 0)
1805 {
1806 switchchar = 'v';
1807 argrest++;
1808 }
1809
1810 /* deal with --option_aliases */
1811 else if (switchchar == '-')
1812 {
1813 if (Ustrcmp(argrest, "help") == 0)
1814 {
1815 usage_wanted = TRUE;
1816 break;
1817 }
1818 else if (Ustrcmp(argrest, "version") == 0)
1819 {
1820 switchchar = 'b';
1821 argrest = US"V";
1822 }
1823 }
1824
1825 /* High-level switch on active initial letter */
1826
1827 switch(switchchar)
1828 {
1829 /* -Btype is a sendmail option for 7bit/8bit setting. Exim is 8-bit clean
1830 so has no need of it. */
1831
1832 case 'B':
1833 if (*argrest == 0) i++; /* Skip over the type */
1834 break;
1835
1836
1837 case 'b':
1838 receiving_message = FALSE; /* Reset TRUE for -bm, -bS, -bs below */
1839
1840 /* -bd: Run in daemon mode, awaiting SMTP connections.
1841 -bdf: Ditto, but in the foreground.
1842 */
1843
1844 if (*argrest == 'd')
1845 {
1846 daemon_listen = TRUE;
1847 if (*(++argrest) == 'f') background_daemon = FALSE;
1848 else if (*argrest != 0) { badarg = TRUE; break; }
1849 }
1850
1851 /* -be: Run in expansion test mode
1852 -bem: Ditto, but read a message from a file first
1853 */
1854
1855 else if (*argrest == 'e')
1856 {
1857 expansion_test = checking = TRUE;
1858 if (argrest[1] == 'm')
1859 {
1860 if (++i >= argc) { badarg = TRUE; break; }
1861 expansion_test_message = argv[i];
1862 argrest++;
1863 }
1864 if (argrest[1] != 0) { badarg = TRUE; break; }
1865 }
1866
1867 /* -bF: Run system filter test */
1868
1869 else if (*argrest == 'F')
1870 {
1871 filter_test |= FTEST_SYSTEM;
1872 if (*(++argrest) != 0) { badarg = TRUE; break; }
1873 if (++i < argc) filter_test_sfile = argv[i]; else
1874 {
1875 fprintf(stderr, "exim: file name expected after %s\n", argv[i-1]);
1876 exit(EXIT_FAILURE);
1877 }
1878 }
1879
1880 /* -bf: Run user filter test
1881 -bfd: Set domain for filter testing
1882 -bfl: Set local part for filter testing
1883 -bfp: Set prefix for filter testing
1884 -bfs: Set suffix for filter testing
1885 */
1886
1887 else if (*argrest == 'f')
1888 {
1889 if (*(++argrest) == 0)
1890 {
1891 filter_test |= FTEST_USER;
1892 if (++i < argc) filter_test_ufile = argv[i]; else
1893 {
1894 fprintf(stderr, "exim: file name expected after %s\n", argv[i-1]);
1895 exit(EXIT_FAILURE);
1896 }
1897 }
1898 else
1899 {
1900 if (++i >= argc)
1901 {
1902 fprintf(stderr, "exim: string expected after %s\n", arg);
1903 exit(EXIT_FAILURE);
1904 }
1905 if (Ustrcmp(argrest, "d") == 0) ftest_domain = argv[i];
1906 else if (Ustrcmp(argrest, "l") == 0) ftest_localpart = argv[i];
1907 else if (Ustrcmp(argrest, "p") == 0) ftest_prefix = argv[i];
1908 else if (Ustrcmp(argrest, "s") == 0) ftest_suffix = argv[i];
1909 else { badarg = TRUE; break; }
1910 }
1911 }
1912
1913 /* -bh: Host checking - an IP address must follow. */
1914
1915 else if (Ustrcmp(argrest, "h") == 0 || Ustrcmp(argrest, "hc") == 0)
1916 {
1917 if (++i >= argc) { badarg = TRUE; break; }
1918 sender_host_address = argv[i];
1919 host_checking = checking = log_testing_mode = TRUE;
1920 host_checking_callout = argrest[1] == 'c';
1921 }
1922
1923 /* -bi: This option is used by sendmail to initialize *the* alias file,
1924 though it has the -oA option to specify a different file. Exim has no
1925 concept of *the* alias file, but since Sun's YP make script calls
1926 sendmail this way, some support must be provided. */
1927
1928 else if (Ustrcmp(argrest, "i") == 0) bi_option = TRUE;
1929
1930 /* -bm: Accept and deliver message - the default option. Reinstate
1931 receiving_message, which got turned off for all -b options. */
1932
1933 else if (Ustrcmp(argrest, "m") == 0) receiving_message = TRUE;
1934
1935 /* -bmalware: test the filename given for malware */
1936
1937 else if (Ustrcmp(argrest, "malware") == 0)
1938 {
1939 if (++i >= argc) { badarg = TRUE; break; }
1940 malware_test_file = argv[i];
1941 }
1942
1943 /* -bnq: For locally originating messages, do not qualify unqualified
1944 addresses. In the envelope, this causes errors; in header lines they
1945 just get left. */
1946
1947 else if (Ustrcmp(argrest, "nq") == 0)
1948 {
1949 allow_unqualified_sender = FALSE;
1950 allow_unqualified_recipient = FALSE;
1951 }
1952
1953 /* -bpxx: List the contents of the mail queue, in various forms. If
1954 the option is -bpc, just a queue count is needed. Otherwise, if the
1955 first letter after p is r, then order is random. */
1956
1957 else if (*argrest == 'p')
1958 {
1959 if (*(++argrest) == 'c')
1960 {
1961 count_queue = TRUE;
1962 if (*(++argrest) != 0) badarg = TRUE;
1963 break;
1964 }
1965
1966 if (*argrest == 'r')
1967 {
1968 list_queue_option = 8;
1969 argrest++;
1970 }
1971 else list_queue_option = 0;
1972
1973 list_queue = TRUE;
1974
1975 /* -bp: List the contents of the mail queue, top-level only */
1976
1977 if (*argrest == 0) {}
1978
1979 /* -bpu: List the contents of the mail queue, top-level undelivered */
1980
1981 else if (Ustrcmp(argrest, "u") == 0) list_queue_option += 1;
1982
1983 /* -bpa: List the contents of the mail queue, including all delivered */
1984
1985 else if (Ustrcmp(argrest, "a") == 0) list_queue_option += 2;
1986
1987 /* Unknown after -bp[r] */
1988
1989 else
1990 {
1991 badarg = TRUE;
1992 break;
1993 }
1994 }
1995
1996
1997 /* -bP: List the configuration variables given as the address list.
1998 Force -v, so configuration errors get displayed. */
1999
2000 else if (Ustrcmp(argrest, "P") == 0)
2001 {
2002 list_options = TRUE;
2003 debug_selector |= D_v;
2004 debug_file = stderr;
2005 }
2006
2007 /* -brt: Test retry configuration lookup */
2008
2009 else if (Ustrcmp(argrest, "rt") == 0)
2010 {
2011 test_retry_arg = i + 1;
2012 goto END_ARG;
2013 }
2014
2015 /* -brw: Test rewrite configuration */
2016
2017 else if (Ustrcmp(argrest, "rw") == 0)
2018 {
2019 test_rewrite_arg = i + 1;
2020 goto END_ARG;
2021 }
2022
2023 /* -bS: Read SMTP commands on standard input, but produce no replies -
2024 all errors are reported by sending messages. */
2025
2026 else if (Ustrcmp(argrest, "S") == 0)
2027 smtp_input = smtp_batched_input = receiving_message = TRUE;
2028
2029 /* -bs: Read SMTP commands on standard input and produce SMTP replies
2030 on standard output. */
2031
2032 else if (Ustrcmp(argrest, "s") == 0) smtp_input = receiving_message = TRUE;
2033
2034 /* -bt: address testing mode */
2035
2036 else if (Ustrcmp(argrest, "t") == 0)
2037 address_test_mode = checking = log_testing_mode = TRUE;
2038
2039 /* -bv: verify addresses */
2040
2041 else if (Ustrcmp(argrest, "v") == 0)
2042 verify_address_mode = checking = log_testing_mode = TRUE;
2043
2044 /* -bvs: verify sender addresses */
2045
2046 else if (Ustrcmp(argrest, "vs") == 0)
2047 {
2048 verify_address_mode = checking = log_testing_mode = TRUE;
2049 verify_as_sender = TRUE;
2050 }
2051
2052 /* -bV: Print version string and support details */
2053
2054 else if (Ustrcmp(argrest, "V") == 0)
2055 {
2056 printf("Exim version %s #%s built %s\n", version_string,
2057 version_cnumber, version_date);
2058 printf("%s\n", CS version_copyright);
2059 version_printed = TRUE;
2060 show_whats_supported(stdout);
2061 }
2062
2063 /* -bw: inetd wait mode, accept a listening socket as stdin */
2064
2065 else if (*argrest == 'w')
2066 {
2067 inetd_wait_mode = TRUE;
2068 background_daemon = FALSE;
2069 daemon_listen = TRUE;
2070 if (*(++argrest) != '\0')
2071 {
2072 inetd_wait_timeout = readconf_readtime(argrest, 0, FALSE);
2073 if (inetd_wait_timeout <= 0)
2074 {
2075 fprintf(stderr, "exim: bad time value %s: abandoned\n", argv[i]);
2076 exit(EXIT_FAILURE);
2077 }
2078 }
2079 }
2080
2081 else badarg = TRUE;
2082 break;
2083
2084
2085 /* -C: change configuration file list; ignore if it isn't really
2086 a change! Enforce a prefix check if required. */
2087
2088 case 'C':
2089 if (*argrest == 0)
2090 {
2091 if(++i < argc) argrest = argv[i]; else
2092 { badarg = TRUE; break; }
2093 }
2094 if (Ustrcmp(config_main_filelist, argrest) != 0)
2095 {
2096 #ifdef ALT_CONFIG_PREFIX
2097 int sep = 0;
2098 int len = Ustrlen(ALT_CONFIG_PREFIX);
2099 uschar *list = argrest;
2100 uschar *filename;
2101 while((filename = string_nextinlist(&list, &sep, big_buffer,
2102 big_buffer_size)) != NULL)
2103 {
2104 if ((Ustrlen(filename) < len ||
2105 Ustrncmp(filename, ALT_CONFIG_PREFIX, len) != 0 ||
2106 Ustrstr(filename, "/../") != NULL) &&
2107 (Ustrcmp(filename, "/dev/null") != 0 || real_uid != root_uid))
2108 {
2109 fprintf(stderr, "-C Permission denied\n");
2110 exit(EXIT_FAILURE);
2111 }
2112 }
2113 #endif
2114 if (real_uid != root_uid)
2115 {
2116 #ifdef TRUSTED_CONFIG_LIST
2117
2118 if (real_uid != exim_uid
2119 #ifdef CONFIGURE_OWNER
2120 && real_uid != config_uid
2121 #endif
2122 )
2123 trusted_config = FALSE;
2124 else
2125 {
2126 FILE *trust_list = Ufopen(TRUSTED_CONFIG_LIST, "rb");
2127 if (trust_list)
2128 {
2129 struct stat statbuf;
2130
2131 if (fstat(fileno(trust_list), &statbuf) != 0 ||
2132 (statbuf.st_uid != root_uid /* owner not root */
2133 #ifdef CONFIGURE_OWNER
2134 && statbuf.st_uid != config_uid /* owner not the special one */
2135 #endif
2136 ) || /* or */
2137 (statbuf.st_gid != root_gid /* group not root */
2138 #ifdef CONFIGURE_GROUP
2139 && statbuf.st_gid != config_gid /* group not the special one */
2140 #endif
2141 && (statbuf.st_mode & 020) != 0 /* group writeable */
2142 ) || /* or */
2143 (statbuf.st_mode & 2) != 0) /* world writeable */
2144 {
2145 trusted_config = FALSE;
2146 fclose(trust_list);
2147 }
2148 else
2149 {
2150 /* Well, the trust list at least is up to scratch... */
2151 void *reset_point = store_get(0);
2152 uschar *trusted_configs[32];
2153 int nr_configs = 0;
2154 int i = 0;
2155
2156 while (Ufgets(big_buffer, big_buffer_size, trust_list))
2157 {
2158 uschar *start = big_buffer, *nl;
2159 while (*start && isspace(*start))
2160 start++;
2161 if (*start != '/')
2162 continue;
2163 nl = Ustrchr(start, '\n');
2164 if (nl)
2165 *nl = 0;
2166 trusted_configs[nr_configs++] = string_copy(start);
2167 if (nr_configs == 32)
2168 break;
2169 }
2170 fclose(trust_list);
2171
2172 if (nr_configs)
2173 {
2174 int sep = 0;
2175 uschar *list = argrest;
2176 uschar *filename;
2177 while (trusted_config && (filename = string_nextinlist(&list,
2178 &sep, big_buffer, big_buffer_size)) != NULL)
2179 {
2180 for (i=0; i < nr_configs; i++)
2181 {
2182 if (Ustrcmp(filename, trusted_configs[i]) == 0)
2183 break;
2184 }
2185 if (i == nr_configs)
2186 {
2187 trusted_config = FALSE;
2188 break;
2189 }
2190 }
2191 store_reset(reset_point);
2192 }
2193 else
2194 {
2195 /* No valid prefixes found in trust_list file. */
2196 trusted_config = FALSE;
2197 }
2198 }
2199 }
2200 else
2201 {
2202 /* Could not open trust_list file. */
2203 trusted_config = FALSE;
2204 }
2205 }
2206 #else
2207 /* Not root; don't trust config */
2208 trusted_config = FALSE;
2209 #endif
2210 }
2211
2212 config_main_filelist = argrest;
2213 config_changed = TRUE;
2214 }
2215 break;
2216
2217
2218 /* -D: set up a macro definition */
2219
2220 case 'D':
2221 #ifdef DISABLE_D_OPTION
2222 fprintf(stderr, "exim: -D is not available in this Exim binary\n");
2223 exit(EXIT_FAILURE);
2224 #else
2225 {
2226 int ptr = 0;
2227 macro_item *mlast = NULL;
2228 macro_item *m;
2229 uschar name[24];
2230 uschar *s = argrest;
2231
2232 while (isspace(*s)) s++;
2233
2234 if (*s < 'A' || *s > 'Z')
2235 {
2236 fprintf(stderr, "exim: macro name set by -D must start with "
2237 "an upper case letter\n");
2238 exit(EXIT_FAILURE);
2239 }
2240
2241 while (isalnum(*s) || *s == '_')
2242 {
2243 if (ptr < sizeof(name)-1) name[ptr++] = *s;
2244 s++;
2245 }
2246 name[ptr] = 0;
2247 if (ptr == 0) { badarg = TRUE; break; }
2248 while (isspace(*s)) s++;
2249 if (*s != 0)
2250 {
2251 if (*s++ != '=') { badarg = TRUE; break; }
2252 while (isspace(*s)) s++;
2253 }
2254
2255 for (m = macros; m != NULL; m = m->next)
2256 {
2257 if (Ustrcmp(m->name, name) == 0)
2258 {
2259 fprintf(stderr, "exim: duplicated -D in command line\n");
2260 exit(EXIT_FAILURE);
2261 }
2262 mlast = m;
2263 }
2264
2265 m = store_get(sizeof(macro_item) + Ustrlen(name));
2266 m->next = NULL;
2267 m->command_line = TRUE;
2268 if (mlast == NULL) macros = m; else mlast->next = m;
2269 Ustrcpy(m->name, name);
2270 m->replacement = string_copy(s);
2271
2272 if (clmacro_count >= MAX_CLMACROS)
2273 {
2274 fprintf(stderr, "exim: too many -D options on command line\n");
2275 exit(EXIT_FAILURE);
2276 }
2277 clmacros[clmacro_count++] = string_sprintf("-D%s=%s", m->name,
2278 m->replacement);
2279 }
2280 #endif
2281 break;
2282
2283 /* -d: Set debug level (see also -v below) or set the drop_cr option.
2284 The latter is now a no-op, retained for compatibility only. If -dd is used,
2285 debugging subprocesses of the daemon is disabled. */
2286
2287 case 'd':
2288 if (Ustrcmp(argrest, "ropcr") == 0)
2289 {
2290 /* drop_cr = TRUE; */
2291 }
2292
2293 /* Use an intermediate variable so that we don't set debugging while
2294 decoding the debugging bits. */
2295
2296 else
2297 {
2298 unsigned int selector = D_default;
2299 debug_selector = 0;
2300 debug_file = NULL;
2301 if (*argrest == 'd')
2302 {
2303 debug_daemon = TRUE;
2304 argrest++;
2305 }
2306 if (*argrest != 0)
2307 decode_bits(&selector, NULL, D_memory, 0, argrest, debug_options,
2308 debug_options_count, US"debug", 0);
2309 debug_selector = selector;
2310 }
2311 break;
2312
2313
2314 /* -E: This is a local error message. This option is not intended for
2315 external use at all, but is not restricted to trusted callers because it
2316 does no harm (just suppresses certain error messages) and if Exim is run
2317 not setuid root it won't always be trusted when it generates error
2318 messages using this option. If there is a message id following -E, point
2319 message_reference at it, for logging. */
2320
2321 case 'E':
2322 local_error_message = TRUE;
2323 if (mac_ismsgid(argrest)) message_reference = argrest;
2324 break;
2325
2326
2327 /* -ex: The vacation program calls sendmail with the undocumented "-eq"
2328 option, so it looks as if historically the -oex options are also callable
2329 without the leading -o. So we have to accept them. Before the switch,
2330 anything starting -oe has been converted to -e. Exim does not support all
2331 of the sendmail error options. */
2332
2333 case 'e':
2334 if (Ustrcmp(argrest, "e") == 0)
2335 {
2336 arg_error_handling = ERRORS_SENDER;
2337 errors_sender_rc = EXIT_SUCCESS;
2338 }
2339 else if (Ustrcmp(argrest, "m") == 0) arg_error_handling = ERRORS_SENDER;
2340 else if (Ustrcmp(argrest, "p") == 0) arg_error_handling = ERRORS_STDERR;
2341 else if (Ustrcmp(argrest, "q") == 0) arg_error_handling = ERRORS_STDERR;
2342 else if (Ustrcmp(argrest, "w") == 0) arg_error_handling = ERRORS_SENDER;
2343 else badarg = TRUE;
2344 break;
2345
2346
2347 /* -F: Set sender's full name, used instead of the gecos entry from
2348 the password file. Since users can usually alter their gecos entries,
2349 there's no security involved in using this instead. The data can follow
2350 the -F or be in the next argument. */
2351
2352 case 'F':
2353 if (*argrest == 0)
2354 {
2355 if(++i < argc) argrest = argv[i]; else
2356 { badarg = TRUE; break; }
2357 }
2358 originator_name = argrest;
2359 sender_name_forced = TRUE;
2360 break;
2361
2362
2363 /* -f: Set sender's address - this value is only actually used if Exim is
2364 run by a trusted user, or if untrusted_set_sender is set and matches the
2365 address, except that the null address can always be set by any user. The
2366 test for this happens later, when the value given here is ignored when not
2367 permitted. For an untrusted user, the actual sender is still put in Sender:
2368 if it doesn't match the From: header (unless no_local_from_check is set).
2369 The data can follow the -f or be in the next argument. The -r switch is an
2370 obsolete form of -f but since there appear to be programs out there that
2371 use anything that sendmail has ever supported, better accept it - the
2372 synonymizing is done before the switch above.
2373
2374 At this stage, we must allow domain literal addresses, because we don't
2375 know what the setting of allow_domain_literals is yet. Ditto for trailing
2376 dots and strip_trailing_dot. */
2377
2378 case 'f':
2379 {
2380 int start, end;
2381 uschar *errmess;
2382 if (*argrest == 0)
2383 {
2384 if (i+1 < argc) argrest = argv[++i]; else
2385 { badarg = TRUE; break; }
2386 }
2387 if (*argrest == 0)
2388 {
2389 sender_address = string_sprintf(""); /* Ensure writeable memory */
2390 }
2391 else
2392 {
2393 uschar *temp = argrest + Ustrlen(argrest) - 1;
2394 while (temp >= argrest && isspace(*temp)) temp--;
2395 if (temp >= argrest && *temp == '.') f_end_dot = TRUE;
2396 allow_domain_literals = TRUE;
2397 strip_trailing_dot = TRUE;
2398 sender_address = parse_extract_address(argrest, &errmess, &start, &end,
2399 &sender_address_domain, TRUE);
2400 allow_domain_literals = FALSE;
2401 strip_trailing_dot = FALSE;
2402 if (sender_address == NULL)
2403 {
2404 fprintf(stderr, "exim: bad -f address \"%s\": %s\n", argrest, errmess);
2405 return EXIT_FAILURE;
2406 }
2407 }
2408 sender_address_forced = TRUE;
2409 }
2410 break;
2411
2412 /* This is some Sendmail thing which can be ignored */
2413
2414 case 'G':
2415 break;
2416
2417 /* -h: Set the hop count for an incoming message. Exim does not currently
2418 support this; it always computes it by counting the Received: headers.
2419 To put it in will require a change to the spool header file format. */
2420
2421 case 'h':
2422 if (*argrest == 0)
2423 {
2424 if(++i < argc) argrest = argv[i]; else
2425 { badarg = TRUE; break; }
2426 }
2427 if (!isdigit(*argrest)) badarg = TRUE;
2428 break;
2429
2430
2431 /* -i: Set flag so dot doesn't end non-SMTP input (same as -oi, seems
2432 not to be documented for sendmail but mailx (at least) uses it) */
2433
2434 case 'i':
2435 if (*argrest == 0) dot_ends = FALSE; else badarg = TRUE;
2436 break;
2437
2438
2439 case 'M':
2440 receiving_message = FALSE;
2441
2442 /* -MC: continue delivery of another message via an existing open
2443 file descriptor. This option is used for an internal call by the
2444 smtp transport when there is a pending message waiting to go to an
2445 address to which it has got a connection. Five subsequent arguments are
2446 required: transport name, host name, IP address, sequence number, and
2447 message_id. Transports may decline to create new processes if the sequence
2448 number gets too big. The channel is stdin. This (-MC) must be the last
2449 argument. There's a subsequent check that the real-uid is privileged.
2450
2451 If we are running in the test harness. delay for a bit, to let the process
2452 that set this one up complete. This makes for repeatability of the logging,
2453 etc. output. */
2454
2455 if (Ustrcmp(argrest, "C") == 0)
2456 {
2457 union sockaddr_46 interface_sock;
2458 EXIM_SOCKLEN_T size = sizeof(interface_sock);
2459
2460 if (argc != i + 6)
2461 {
2462 fprintf(stderr, "exim: too many or too few arguments after -MC\n");
2463 return EXIT_FAILURE;
2464 }
2465
2466 if (msg_action_arg >= 0)
2467 {
2468 fprintf(stderr, "exim: incompatible arguments\n");
2469 return EXIT_FAILURE;
2470 }
2471
2472 continue_transport = argv[++i];
2473 continue_hostname = argv[++i];
2474 continue_host_address = argv[++i];
2475 continue_sequence = Uatoi(argv[++i]);
2476 msg_action = MSG_DELIVER;
2477 msg_action_arg = ++i;
2478 forced_delivery = TRUE;
2479 queue_run_pid = passed_qr_pid;
2480 queue_run_pipe = passed_qr_pipe;
2481
2482 if (!mac_ismsgid(argv[i]))
2483 {
2484 fprintf(stderr, "exim: malformed message id %s after -MC option\n",
2485 argv[i]);
2486 return EXIT_FAILURE;
2487 }
2488
2489 /* Set up $sending_ip_address and $sending_port */
2490
2491 if (getsockname(fileno(stdin), (struct sockaddr *)(&interface_sock),
2492 &size) == 0)
2493 sending_ip_address = host_ntoa(-1, &interface_sock, NULL,
2494 &sending_port);
2495 else
2496 {
2497 fprintf(stderr, "exim: getsockname() failed after -MC option: %s\n",
2498 strerror(errno));
2499 return EXIT_FAILURE;
2500 }
2501
2502 if (running_in_test_harness) millisleep(500);
2503 break;
2504 }
2505
2506 /* -MCA: set the smtp_authenticated flag; this is useful only when it
2507 precedes -MC (see above). The flag indicates that the host to which
2508 Exim is connected has accepted an AUTH sequence. */
2509
2510 else if (Ustrcmp(argrest, "CA") == 0)
2511 {
2512 smtp_authenticated = TRUE;
2513 break;
2514 }
2515
2516 /* -MCP: set the smtp_use_pipelining flag; this is useful only when
2517 it preceded -MC (see above) */
2518
2519 else if (Ustrcmp(argrest, "CP") == 0)
2520 {
2521 smtp_use_pipelining = TRUE;
2522 break;
2523 }
2524
2525 /* -MCQ: pass on the pid of the queue-running process that started
2526 this chain of deliveries and the fd of its synchronizing pipe; this
2527 is useful only when it precedes -MC (see above) */
2528
2529 else if (Ustrcmp(argrest, "CQ") == 0)
2530 {
2531 if(++i < argc) passed_qr_pid = (pid_t)(Uatol(argv[i]));
2532 else badarg = TRUE;
2533 if(++i < argc) passed_qr_pipe = (int)(Uatol(argv[i]));
2534 else badarg = TRUE;
2535 break;
2536 }
2537
2538 /* -MCS: set the smtp_use_size flag; this is useful only when it
2539 precedes -MC (see above) */
2540
2541 else if (Ustrcmp(argrest, "CS") == 0)
2542 {
2543 smtp_use_size = TRUE;
2544 break;
2545 }
2546
2547 /* -MCT: set the tls_offered flag; this is useful only when it
2548 precedes -MC (see above). The flag indicates that the host to which
2549 Exim is connected has offered TLS support. */
2550
2551 #ifdef SUPPORT_TLS
2552 else if (Ustrcmp(argrest, "CT") == 0)
2553 {
2554 tls_offered = TRUE;
2555 break;
2556 }
2557 #endif
2558
2559 /* -M[x]: various operations on the following list of message ids:
2560 -M deliver the messages, ignoring next retry times and thawing
2561 -Mc deliver the messages, checking next retry times, no thawing
2562 -Mf freeze the messages
2563 -Mg give up on the messages
2564 -Mt thaw the messages
2565 -Mrm remove the messages
2566 In the above cases, this must be the last option. There are also the
2567 following options which are followed by a single message id, and which
2568 act on that message. Some of them use the "recipient" addresses as well.
2569 -Mar add recipient(s)
2570 -Mmad mark all recipients delivered
2571 -Mmd mark recipients(s) delivered
2572 -Mes edit sender
2573 -Mset load a message for use with -be
2574 -Mvb show body
2575 -Mvc show copy (of whole message, in RFC 2822 format)
2576 -Mvh show header
2577 -Mvl show log
2578 */
2579
2580 else if (*argrest == 0)
2581 {
2582 msg_action = MSG_DELIVER;
2583 forced_delivery = deliver_force_thaw = TRUE;
2584 }
2585 else if (Ustrcmp(argrest, "ar") == 0)
2586 {
2587 msg_action = MSG_ADD_RECIPIENT;
2588 one_msg_action = TRUE;
2589 }
2590 else if (Ustrcmp(argrest, "c") == 0) msg_action = MSG_DELIVER;
2591 else if (Ustrcmp(argrest, "es") == 0)
2592 {
2593 msg_action = MSG_EDIT_SENDER;
2594 one_msg_action = TRUE;
2595 }
2596 else if (Ustrcmp(argrest, "f") == 0) msg_action = MSG_FREEZE;
2597 else if (Ustrcmp(argrest, "g") == 0)
2598 {
2599 msg_action = MSG_DELIVER;
2600 deliver_give_up = TRUE;
2601 }
2602 else if (Ustrcmp(argrest, "mad") == 0)
2603 {
2604 msg_action = MSG_MARK_ALL_DELIVERED;
2605 }
2606 else if (Ustrcmp(argrest, "md") == 0)
2607 {
2608 msg_action = MSG_MARK_DELIVERED;
2609 one_msg_action = TRUE;
2610 }
2611 else if (Ustrcmp(argrest, "rm") == 0) msg_action = MSG_REMOVE;
2612 else if (Ustrcmp(argrest, "set") == 0)
2613 {
2614 msg_action = MSG_LOAD;
2615 one_msg_action = TRUE;
2616 }
2617 else if (Ustrcmp(argrest, "t") == 0) msg_action = MSG_THAW;
2618 else if (Ustrcmp(argrest, "vb") == 0)
2619 {
2620 msg_action = MSG_SHOW_BODY;
2621 one_msg_action = TRUE;
2622 }
2623 else if (Ustrcmp(argrest, "vc") == 0)
2624 {
2625 msg_action = MSG_SHOW_COPY;
2626 one_msg_action = TRUE;
2627 }
2628 else if (Ustrcmp(argrest, "vh") == 0)
2629 {
2630 msg_action = MSG_SHOW_HEADER;
2631 one_msg_action = TRUE;
2632 }
2633 else if (Ustrcmp(argrest, "vl") == 0)
2634 {
2635 msg_action = MSG_SHOW_LOG;
2636 one_msg_action = TRUE;
2637 }
2638 else { badarg = TRUE; break; }
2639
2640 /* All the -Mxx options require at least one message id. */
2641
2642 msg_action_arg = i + 1;
2643 if (msg_action_arg >= argc)
2644 {
2645 fprintf(stderr, "exim: no message ids given after %s option\n", arg);
2646 return EXIT_FAILURE;
2647 }
2648
2649 /* Some require only message ids to follow */
2650
2651 if (!one_msg_action)
2652 {
2653 int j;
2654 for (j = msg_action_arg; j < argc; j++) if (!mac_ismsgid(argv[j]))
2655 {
2656 fprintf(stderr, "exim: malformed message id %s after %s option\n",
2657 argv[j], arg);
2658 return EXIT_FAILURE;
2659 }
2660 goto END_ARG; /* Remaining args are ids */
2661 }
2662
2663 /* Others require only one message id, possibly followed by addresses,
2664 which will be handled as normal arguments. */
2665
2666 else
2667 {
2668 if (!mac_ismsgid(argv[msg_action_arg]))
2669 {
2670 fprintf(stderr, "exim: malformed message id %s after %s option\n",
2671 argv[msg_action_arg], arg);
2672 return EXIT_FAILURE;
2673 }
2674 i++;
2675 }
2676 break;
2677
2678
2679 /* Some programs seem to call the -om option without the leading o;
2680 for sendmail it askes for "me too". Exim always does this. */
2681
2682 case 'm':
2683 if (*argrest != 0) badarg = TRUE;
2684 break;
2685
2686
2687 /* -N: don't do delivery - a debugging option that stops transports doing
2688 their thing. It implies debugging at the D_v level. */
2689
2690 case 'N':
2691 if (*argrest == 0)
2692 {
2693 dont_deliver = TRUE;
2694 debug_selector |= D_v;
2695 debug_file = stderr;
2696 }
2697 else badarg = TRUE;
2698 break;
2699
2700
2701 /* -n: This means "don't alias" in sendmail, apparently. Just ignore
2702 it. */
2703
2704 case 'n':
2705 break;
2706
2707 /* -O: Just ignore it. In sendmail, apparently -O option=value means set
2708 option to the specified value. This form uses long names. We need to handle
2709 -O option=value and -Ooption=value. */
2710
2711 case 'O':
2712 if (*argrest == 0)
2713 {
2714 if (++i >= argc)
2715 {
2716 fprintf(stderr, "exim: string expected after -O\n");
2717 exit(EXIT_FAILURE);
2718 }
2719 }
2720 break;
2721
2722 case 'o':
2723
2724 /* -oA: Set an argument for the bi command (sendmail's "alternate alias
2725 file" option). */
2726
2727 if (*argrest == 'A')
2728 {
2729 alias_arg = argrest + 1;
2730 if (alias_arg[0] == 0)
2731 {
2732 if (i+1 < argc) alias_arg = argv[++i]; else
2733 {
2734 fprintf(stderr, "exim: string expected after -oA\n");
2735 exit(EXIT_FAILURE);
2736 }
2737 }
2738 }
2739
2740 /* -oB: Set a connection message max value for remote deliveries */
2741
2742 else if (*argrest == 'B')
2743 {
2744 uschar *p = argrest + 1;
2745 if (p[0] == 0)
2746 {
2747 if (i+1 < argc && isdigit((argv[i+1][0]))) p = argv[++i]; else
2748 {
2749 connection_max_messages = 1;
2750 p = NULL;
2751 }
2752 }
2753
2754 if (p != NULL)
2755 {
2756 if (!isdigit(*p))
2757 {
2758 fprintf(stderr, "exim: number expected after -oB\n");
2759 exit(EXIT_FAILURE);
2760 }
2761 connection_max_messages = Uatoi(p);
2762 }
2763 }
2764
2765 /* -odb: background delivery */
2766
2767 else if (Ustrcmp(argrest, "db") == 0)
2768 {
2769 synchronous_delivery = FALSE;
2770 arg_queue_only = FALSE;
2771 queue_only_set = TRUE;
2772 }
2773
2774 /* -odf: foreground delivery (smail-compatible option); same effect as
2775 -odi: interactive (synchronous) delivery (sendmail-compatible option)
2776 */
2777
2778 else if (Ustrcmp(argrest, "df") == 0 || Ustrcmp(argrest, "di") == 0)
2779 {
2780 synchronous_delivery = TRUE;
2781 arg_queue_only = FALSE;
2782 queue_only_set = TRUE;
2783 }
2784
2785 /* -odq: queue only */
2786
2787 else if (Ustrcmp(argrest, "dq") == 0)
2788 {
2789 synchronous_delivery = FALSE;
2790 arg_queue_only = TRUE;
2791 queue_only_set = TRUE;
2792 }
2793
2794 /* -odqs: queue SMTP only - do local deliveries and remote routing,
2795 but no remote delivery */
2796
2797 else if (Ustrcmp(argrest, "dqs") == 0)
2798 {
2799 queue_smtp = TRUE;
2800 arg_queue_only = FALSE;
2801 queue_only_set = TRUE;
2802 }
2803
2804 /* -oex: Sendmail error flags. As these are also accepted without the
2805 leading -o prefix, for compatibility with vacation and other callers,
2806 they are handled with -e above. */
2807
2808 /* -oi: Set flag so dot doesn't end non-SMTP input (same as -i)
2809 -oitrue: Another sendmail syntax for the same */
2810
2811 else if (Ustrcmp(argrest, "i") == 0 ||
2812 Ustrcmp(argrest, "itrue") == 0)
2813 dot_ends = FALSE;
2814
2815 /* -oM*: Set various characteristics for an incoming message; actually
2816 acted on for trusted callers only. */
2817
2818 else if (*argrest == 'M')
2819 {
2820 if (i+1 >= argc)
2821 {
2822 fprintf(stderr, "exim: data expected after -o%s\n", argrest);
2823 exit(EXIT_FAILURE);
2824 }
2825
2826 /* -oMa: Set sender host address */
2827
2828 if (Ustrcmp(argrest, "Ma") == 0) sender_host_address = argv[++i];
2829
2830 /* -oMaa: Set authenticator name */
2831
2832 else if (Ustrcmp(argrest, "Maa") == 0)
2833 sender_host_authenticated = argv[++i];
2834
2835 /* -oMas: setting authenticated sender */
2836
2837 else if (Ustrcmp(argrest, "Mas") == 0) authenticated_sender = argv[++i];
2838
2839 /* -oMai: setting authenticated id */
2840
2841 else if (Ustrcmp(argrest, "Mai") == 0) authenticated_id = argv[++i];
2842
2843 /* -oMi: Set incoming interface address */
2844
2845 else if (Ustrcmp(argrest, "Mi") == 0) interface_address = argv[++i];
2846
2847 /* -oMr: Received protocol */
2848
2849 else if (Ustrcmp(argrest, "Mr") == 0) received_protocol = argv[++i];
2850
2851 /* -oMs: Set sender host name */
2852
2853 else if (Ustrcmp(argrest, "Ms") == 0) sender_host_name = argv[++i];
2854
2855 /* -oMt: Set sender ident */
2856
2857 else if (Ustrcmp(argrest, "Mt") == 0)
2858 {
2859 sender_ident_set = TRUE;
2860 sender_ident = argv[++i];
2861 }
2862
2863 /* Else a bad argument */
2864
2865 else
2866 {
2867 badarg = TRUE;
2868 break;
2869 }
2870 }
2871
2872 /* -om: Me-too flag for aliases. Exim always does this. Some programs
2873 seem to call this as -m (undocumented), so that is also accepted (see
2874 above). */
2875
2876 else if (Ustrcmp(argrest, "m") == 0) {}
2877
2878 /* -oo: An ancient flag for old-style addresses which still seems to
2879 crop up in some calls (see in SCO). */
2880
2881 else if (Ustrcmp(argrest, "o") == 0) {}
2882
2883 /* -oP <name>: set pid file path for daemon */
2884
2885 else if (Ustrcmp(argrest, "P") == 0)
2886 override_pid_file_path = argv[++i];
2887
2888 /* -or <n>: set timeout for non-SMTP acceptance
2889 -os <n>: set timeout for SMTP acceptance */
2890
2891 else if (*argrest == 'r' || *argrest == 's')
2892 {
2893 int *tp = (*argrest == 'r')?
2894 &arg_receive_timeout : &arg_smtp_receive_timeout;
2895 if (argrest[1] == 0)
2896 {
2897 if (i+1 < argc) *tp= readconf_readtime(argv[++i], 0, FALSE);
2898 }
2899 else *tp = readconf_readtime(argrest + 1, 0, FALSE);
2900 if (*tp < 0)
2901 {
2902 fprintf(stderr, "exim: bad time value %s: abandoned\n", argv[i]);
2903 exit(EXIT_FAILURE);
2904 }
2905 }
2906
2907 /* -oX <list>: Override local_interfaces and/or default daemon ports */
2908
2909 else if (Ustrcmp(argrest, "X") == 0)
2910 override_local_interfaces = argv[++i];
2911
2912 /* Unknown -o argument */
2913
2914 else badarg = TRUE;
2915 break;
2916
2917
2918 /* -ps: force Perl startup; -pd force delayed Perl startup */
2919
2920 case 'p':
2921 #ifdef EXIM_PERL
2922 if (*argrest == 's' && argrest[1] == 0)
2923 {
2924 perl_start_option = 1;
2925 break;
2926 }
2927 if (*argrest == 'd' && argrest[1] == 0)
2928 {
2929 perl_start_option = -1;
2930 break;
2931 }
2932 #endif
2933
2934 /* -panythingelse is taken as the Sendmail-compatible argument -prval:sval,
2935 which sets the host protocol and host name */
2936
2937 if (*argrest == 0)
2938 {
2939 if (i+1 < argc) argrest = argv[++i]; else
2940 { badarg = TRUE; break; }
2941 }
2942
2943 if (*argrest != 0)
2944 {
2945 uschar *hn = Ustrchr(argrest, ':');
2946 if (hn == NULL)
2947 {
2948 received_protocol = argrest;
2949 }
2950 else
2951 {
2952 received_protocol = string_copyn(argrest, hn - argrest);
2953 sender_host_name = hn + 1;
2954 }
2955 }
2956 break;
2957
2958
2959 case 'q':
2960 receiving_message = FALSE;
2961 if (queue_interval >= 0)
2962 {
2963 fprintf(stderr, "exim: -q specified more than once\n");
2964 exit(EXIT_FAILURE);
2965 }
2966
2967 /* -qq...: Do queue runs in a 2-stage manner */
2968
2969 if (*argrest == 'q')
2970 {
2971 queue_2stage = TRUE;
2972 argrest++;
2973 }
2974
2975 /* -qi...: Do only first (initial) deliveries */
2976
2977 if (*argrest == 'i')
2978 {
2979 queue_run_first_delivery = TRUE;
2980 argrest++;
2981 }
2982
2983 /* -qf...: Run the queue, forcing deliveries
2984 -qff..: Ditto, forcing thawing as well */
2985
2986 if (*argrest == 'f')
2987 {
2988 queue_run_force = TRUE;
2989 if (*(++argrest) == 'f')
2990 {
2991 deliver_force_thaw = TRUE;
2992 argrest++;
2993 }
2994 }
2995
2996 /* -q[f][f]l...: Run the queue only on local deliveries */
2997
2998 if (*argrest == 'l')
2999 {
3000 queue_run_local = TRUE;
3001 argrest++;
3002 }
3003
3004 /* -q[f][f][l]: Run the queue, optionally forced, optionally local only,
3005 optionally starting from a given message id. */
3006
3007 if (*argrest == 0 &&
3008 (i + 1 >= argc || argv[i+1][0] == '-' || mac_ismsgid(argv[i+1])))
3009 {
3010 queue_interval = 0;
3011 if (i+1 < argc && mac_ismsgid(argv[i+1]))
3012 start_queue_run_id = argv[++i];
3013 if (i+1 < argc && mac_ismsgid(argv[i+1]))
3014 stop_queue_run_id = argv[++i];
3015 }
3016
3017 /* -q[f][f][l]<n>: Run the queue at regular intervals, optionally forced,
3018 optionally local only. */
3019
3020 else
3021 {
3022 if (*argrest != 0)
3023 queue_interval = readconf_readtime(argrest, 0, FALSE);
3024 else
3025 queue_interval = readconf_readtime(argv[++i], 0, FALSE);
3026 if (queue_interval <= 0)
3027 {
3028 fprintf(stderr, "exim: bad time value %s: abandoned\n", argv[i]);
3029 exit(EXIT_FAILURE);
3030 }
3031 }
3032 break;
3033
3034
3035 case 'R': /* Synonymous with -qR... */
3036 receiving_message = FALSE;
3037
3038 /* -Rf: As -R (below) but force all deliveries,
3039 -Rff: Ditto, but also thaw all frozen messages,
3040 -Rr: String is regex
3041 -Rrf: Regex and force
3042 -Rrff: Regex and force and thaw
3043
3044 in all cases provided there are no further characters in this
3045 argument. */
3046
3047 if (*argrest != 0)
3048 {
3049 int i;
3050 for (i = 0; i < sizeof(rsopts)/sizeof(uschar *); i++)
3051 {
3052 if (Ustrcmp(argrest, rsopts[i]) == 0)
3053 {
3054 if (i != 2) queue_run_force = TRUE;
3055 if (i >= 2) deliver_selectstring_regex = TRUE;
3056 if (i == 1 || i == 4) deliver_force_thaw = TRUE;
3057 argrest += Ustrlen(rsopts[i]);
3058 }
3059 }
3060 }
3061
3062 /* -R: Set string to match in addresses for forced queue run to
3063 pick out particular messages. */
3064
3065 if (*argrest == 0)
3066 {
3067 if (i+1 < argc) deliver_selectstring = argv[++i]; else
3068 {
3069 fprintf(stderr, "exim: string expected after -R\n");
3070 exit(EXIT_FAILURE);
3071 }
3072 }
3073 else deliver_selectstring = argrest;
3074 break;
3075
3076
3077 /* -r: an obsolete synonym for -f (see above) */
3078
3079
3080 /* -S: Like -R but works on sender. */
3081
3082 case 'S': /* Synonymous with -qS... */
3083 receiving_message = FALSE;
3084
3085 /* -Sf: As -S (below) but force all deliveries,
3086 -Sff: Ditto, but also thaw all frozen messages,
3087 -Sr: String is regex
3088 -Srf: Regex and force
3089 -Srff: Regex and force and thaw
3090
3091 in all cases provided there are no further characters in this
3092 argument. */
3093
3094 if (*argrest != 0)
3095 {
3096 int i;
3097 for (i = 0; i < sizeof(rsopts)/sizeof(uschar *); i++)
3098 {
3099 if (Ustrcmp(argrest, rsopts[i]) == 0)
3100 {
3101 if (i != 2) queue_run_force = TRUE;
3102 if (i >= 2) deliver_selectstring_sender_regex = TRUE;
3103 if (i == 1 || i == 4) deliver_force_thaw = TRUE;
3104 argrest += Ustrlen(rsopts[i]);
3105 }
3106 }
3107 }
3108
3109 /* -S: Set string to match in addresses for forced queue run to
3110 pick out particular messages. */
3111
3112 if (*argrest == 0)
3113 {
3114 if (i+1 < argc) deliver_selectstring_sender = argv[++i]; else
3115 {
3116 fprintf(stderr, "exim: string expected after -S\n");
3117 exit(EXIT_FAILURE);
3118 }
3119 }
3120 else deliver_selectstring_sender = argrest;
3121 break;
3122
3123 /* -Tqt is an option that is exclusively for use by the testing suite.
3124 It is not recognized in other circumstances. It allows for the setting up
3125 of explicit "queue times" so that various warning/retry things can be
3126 tested. Otherwise variability of clock ticks etc. cause problems. */
3127
3128 case 'T':
3129 if (running_in_test_harness && Ustrcmp(argrest, "qt") == 0)
3130 fudged_queue_times = argv[++i];
3131 else badarg = TRUE;
3132 break;
3133
3134
3135 /* -t: Set flag to extract recipients from body of message. */
3136
3137 case 't':
3138 if (*argrest == 0) extract_recipients = TRUE;
3139
3140 /* -ti: Set flag to extract recipients from body of message, and also
3141 specify that dot does not end the message. */
3142
3143 else if (Ustrcmp(argrest, "i") == 0)
3144 {
3145 extract_recipients = TRUE;
3146 dot_ends = FALSE;
3147 }
3148
3149 /* -tls-on-connect: don't wait for STARTTLS (for old clients) */
3150
3151 #ifdef SUPPORT_TLS
3152 else if (Ustrcmp(argrest, "ls-on-connect") == 0) tls_on_connect = TRUE;
3153 #endif
3154
3155 else badarg = TRUE;
3156 break;
3157
3158
3159 /* -U: This means "initial user submission" in sendmail, apparently. The
3160 doc claims that in future sendmail may refuse syntactically invalid
3161 messages instead of fixing them. For the moment, we just ignore it. */
3162
3163 case 'U':
3164 break;
3165
3166
3167 /* -v: verify things - this is a very low-level debugging */
3168
3169 case 'v':
3170 if (*argrest == 0)
3171 {
3172 debug_selector |= D_v;
3173 debug_file = stderr;
3174 }
3175 else badarg = TRUE;
3176 break;
3177
3178
3179 /* -x: AIX uses this to indicate some fancy 8-bit character stuff:
3180
3181 The -x flag tells the sendmail command that mail from a local
3182 mail program has National Language Support (NLS) extended characters
3183 in the body of the mail item. The sendmail command can send mail with
3184 extended NLS characters across networks that normally corrupts these
3185 8-bit characters.
3186
3187 As Exim is 8-bit clean, it just ignores this flag. */
3188
3189 case 'x':
3190 if (*argrest != 0) badarg = TRUE;
3191 break;
3192
3193 /* All other initial characters are errors */
3194
3195 default:
3196 badarg = TRUE;
3197 break;
3198 } /* End of high-level switch statement */
3199
3200 /* Failed to recognize the option, or syntax error */
3201
3202 if (badarg)
3203 {
3204 fprintf(stderr, "exim abandoned: unknown, malformed, or incomplete "
3205 "option %s\n", arg);
3206 exit(EXIT_FAILURE);
3207 }
3208 }
3209
3210
3211 /* If -R or -S have been specified without -q, assume a single queue run. */
3212
3213 if ((deliver_selectstring != NULL || deliver_selectstring_sender != NULL) &&
3214 queue_interval < 0) queue_interval = 0;
3215
3216
3217 END_ARG:
3218 /* If usage_wanted is set we call the usage function - which never returns */
3219 if (usage_wanted) exim_usage(called_as);
3220
3221 /* Arguments have been processed. Check for incompatibilities. */
3222 if ((
3223 (smtp_input || extract_recipients || recipients_arg < argc) &&
3224 (daemon_listen || queue_interval >= 0 || bi_option ||
3225 test_retry_arg >= 0 || test_rewrite_arg >= 0 ||
3226 filter_test != FTEST_NONE || (msg_action_arg > 0 && !one_msg_action))
3227 ) ||
3228 (
3229 msg_action_arg > 0 &&
3230 (daemon_listen || queue_interval >= 0 || list_options ||
3231 (checking && msg_action != MSG_LOAD) ||
3232 bi_option || test_retry_arg >= 0 || test_rewrite_arg >= 0)
3233 ) ||
3234 (
3235 (daemon_listen || queue_interval >= 0) &&
3236 (sender_address != NULL || list_options || list_queue || checking ||
3237 bi_option)
3238 ) ||
3239 (
3240 daemon_listen && queue_interval == 0
3241 ) ||
3242 (
3243 inetd_wait_mode && queue_interval >= 0
3244 ) ||
3245 (
3246 list_options &&
3247 (checking || smtp_input || extract_recipients ||
3248 filter_test != FTEST_NONE || bi_option)
3249 ) ||
3250 (
3251 verify_address_mode &&
3252 (address_test_mode || smtp_input || extract_recipients ||
3253 filter_test != FTEST_NONE || bi_option)
3254 ) ||
3255 (
3256 address_test_mode && (smtp_input || extract_recipients ||
3257 filter_test != FTEST_NONE || bi_option)
3258 ) ||
3259 (
3260 smtp_input && (sender_address != NULL || filter_test != FTEST_NONE ||
3261 extract_recipients)
3262 ) ||
3263 (
3264 deliver_selectstring != NULL && queue_interval < 0
3265 ) ||
3266 (
3267 msg_action == MSG_LOAD &&
3268 (!expansion_test || expansion_test_message != NULL)
3269 )
3270 )
3271 {
3272 fprintf(stderr, "exim: incompatible command-line options or arguments\n");
3273 exit(EXIT_FAILURE);
3274 }
3275
3276 /* If debugging is set up, set the file and the file descriptor to pass on to
3277 child processes. It should, of course, be 2 for stderr. Also, force the daemon
3278 to run in the foreground. */
3279
3280 if (debug_selector != 0)
3281 {
3282 debug_file = stderr;
3283 debug_fd = fileno(debug_file);
3284 background_daemon = FALSE;
3285 if (running_in_test_harness) millisleep(100); /* lets caller finish */
3286 if (debug_selector != D_v) /* -v only doesn't show this */
3287 {
3288 debug_printf("Exim version %s uid=%ld gid=%ld pid=%d D=%x\n",
3289 version_string, (long int)real_uid, (long int)real_gid, (int)getpid(),
3290 debug_selector);
3291 if (!version_printed)
3292 show_whats_supported(stderr);
3293 }
3294 }
3295
3296 /* When started with root privilege, ensure that the limits on the number of
3297 open files and the number of processes (where that is accessible) are
3298 sufficiently large, or are unset, in case Exim has been called from an
3299 environment where the limits are screwed down. Not all OS have the ability to
3300 change some of these limits. */
3301
3302 if (unprivileged)
3303 {
3304 DEBUG(D_any) debug_print_ids(US"Exim has no root privilege:");
3305 }
3306 else
3307 {
3308 struct rlimit rlp;
3309
3310 #ifdef RLIMIT_NOFILE
3311 if (getrlimit(RLIMIT_NOFILE, &rlp) < 0)
3312 {
3313 log_write(0, LOG_MAIN|LOG_PANIC, "getrlimit(RLIMIT_NOFILE) failed: %s",
3314 strerror(errno));
3315 rlp.rlim_cur = rlp.rlim_max = 0;
3316 }
3317
3318 /* I originally chose 1000 as a nice big number that was unlikely to
3319 be exceeded. It turns out that some older OS have a fixed upper limit of
3320 256. */
3321
3322 if (rlp.rlim_cur < 1000)
3323 {
3324 rlp.rlim_cur = rlp.rlim_max = 1000;
3325 if (setrlimit(RLIMIT_NOFILE, &rlp) < 0)
3326 {
3327 rlp.rlim_cur = rlp.rlim_max = 256;
3328 if (setrlimit(RLIMIT_NOFILE, &rlp) < 0)
3329 log_write(0, LOG_MAIN|LOG_PANIC, "setrlimit(RLIMIT_NOFILE) failed: %s",
3330 strerror(errno));
3331 }
3332 }
3333 #endif
3334
3335 #ifdef RLIMIT_NPROC
3336 if (getrlimit(RLIMIT_NPROC, &rlp) < 0)
3337 {
3338 log_write(0, LOG_MAIN|LOG_PANIC, "getrlimit(RLIMIT_NPROC) failed: %s",
3339 strerror(errno));
3340 rlp.rlim_cur = rlp.rlim_max = 0;
3341 }
3342
3343 #ifdef RLIM_INFINITY
3344 if (rlp.rlim_cur != RLIM_INFINITY && rlp.rlim_cur < 1000)
3345 {
3346 rlp.rlim_cur = rlp.rlim_max = RLIM_INFINITY;
3347 #else
3348 if (rlp.rlim_cur < 1000)
3349 {
3350 rlp.rlim_cur = rlp.rlim_max = 1000;
3351 #endif
3352 if (setrlimit(RLIMIT_NPROC, &rlp) < 0)
3353 log_write(0, LOG_MAIN|LOG_PANIC, "setrlimit(RLIMIT_NPROC) failed: %s",
3354 strerror(errno));
3355 }
3356 #endif
3357 }
3358
3359 /* Exim is normally entered as root (but some special configurations are
3360 possible that don't do this). However, it always spins off sub-processes that
3361 set their uid and gid as required for local delivery. We don't want to pass on
3362 any extra groups that root may belong to, so we want to get rid of them all at
3363 this point.
3364
3365 We need to obey setgroups() at this stage, before possibly giving up root
3366 privilege for a changed configuration file, but later on we might need to
3367 check on the additional groups for the admin user privilege - can't do that
3368 till after reading the config, which might specify the exim gid. Therefore,
3369 save the group list here first. */
3370
3371 group_count = getgroups(NGROUPS_MAX, group_list);
3372 if (group_count < 0)
3373 {
3374 fprintf(stderr, "exim: getgroups() failed: %s\n", strerror(errno));
3375 exit(EXIT_FAILURE);
3376 }
3377
3378 /* There is a fundamental difference in some BSD systems in the matter of
3379 groups. FreeBSD and BSDI are known to be different; NetBSD and OpenBSD are
3380 known not to be different. On the "different" systems there is a single group
3381 list, and the first entry in it is the current group. On all other versions of
3382 Unix there is a supplementary group list, which is in *addition* to the current
3383 group. Consequently, to get rid of all extraneous groups on a "standard" system
3384 you pass over 0 groups to setgroups(), while on a "different" system you pass
3385 over a single group - the current group, which is always the first group in the
3386 list. Calling setgroups() with zero groups on a "different" system results in
3387 an error return. The following code should cope with both types of system.
3388
3389 However, if this process isn't running as root, setgroups() can't be used
3390 since you have to be root to run it, even if throwing away groups. Not being
3391 root here happens only in some unusual configurations. We just ignore the
3392 error. */
3393
3394 if (setgroups(0, NULL) != 0)
3395 {
3396 if (setgroups(1, group_list) != 0 && !unprivileged)
3397 {
3398 fprintf(stderr, "exim: setgroups() failed: %s\n", strerror(errno));
3399 exit(EXIT_FAILURE);
3400 }
3401 }
3402
3403 /* If the configuration file name has been altered by an argument on the
3404 command line (either a new file name or a macro definition) and the caller is
3405 not root, or if this is a filter testing run, remove any setuid privilege the
3406 program has and run as the underlying user.
3407
3408 The exim user is locked out of this, which severely restricts the use of -C
3409 for some purposes.
3410
3411 Otherwise, set the real ids to the effective values (should be root unless run
3412 from inetd, which it can either be root or the exim uid, if one is configured).
3413
3414 There is a private mechanism for bypassing some of this, in order to make it
3415 possible to test lots of configurations automatically, without having either to
3416 recompile each time, or to patch in an actual configuration file name and other
3417 values (such as the path name). If running in the test harness, pretend that
3418 configuration file changes and macro definitions haven't happened. */
3419
3420 if (( /* EITHER */
3421 (!trusted_config || /* Config changed, or */
3422 !macros_trusted()) && /* impermissible macros and */
3423 real_uid != root_uid && /* Not root, and */
3424 !running_in_test_harness /* Not fudged */
3425 ) || /* OR */
3426 expansion_test /* expansion testing */
3427 || /* OR */
3428 filter_test != FTEST_NONE) /* Filter testing */
3429 {
3430 setgroups(group_count, group_list);
3431 exim_setugid(real_uid, real_gid, FALSE,
3432 US"-C, -D, -be or -bf forces real uid");
3433 removed_privilege = TRUE;
3434
3435 /* In the normal case when Exim is called like this, stderr is available
3436 and should be used for any logging information because attempts to write
3437 to the log will usually fail. To arrange this, we unset really_exim. However,
3438 if no stderr is available there is no point - we might as well have a go
3439 at the log (if it fails, syslog will be written).
3440
3441 Note that if the invoker is Exim, the logs remain available. Messing with
3442 this causes unlogged successful deliveries. */
3443
3444 if ((log_stderr != NULL) && (real_uid != exim_uid))
3445 really_exim = FALSE;
3446 }
3447
3448 /* Privilege is to be retained for the moment. It may be dropped later,
3449 depending on the job that this Exim process has been asked to do. For now, set
3450 the real uid to the effective so that subsequent re-execs of Exim are done by a
3451 privileged user. */
3452
3453 else exim_setugid(geteuid(), getegid(), FALSE, US"forcing real = effective");
3454
3455 /* If testing a filter, open the file(s) now, before wasting time doing other
3456 setups and reading the message. */
3457
3458 if ((filter_test & FTEST_SYSTEM) != 0)
3459 {
3460 filter_sfd = Uopen(filter_test_sfile, O_RDONLY, 0);
3461 if (filter_sfd < 0)
3462 {
3463 fprintf(stderr, "exim: failed to open %s: %s\n", filter_test_sfile,
3464 strerror(errno));
3465 return EXIT_FAILURE;
3466 }
3467 }
3468
3469 if ((filter_test & FTEST_USER) != 0)
3470 {
3471 filter_ufd = Uopen(filter_test_ufile, O_RDONLY, 0);
3472 if (filter_ufd < 0)
3473 {
3474 fprintf(stderr, "exim: failed to open %s: %s\n", filter_test_ufile,
3475 strerror(errno));
3476 return EXIT_FAILURE;
3477 }
3478 }
3479
3480 /* Initialise lookup_list
3481 If debugging, already called above via version reporting.
3482 In either case, we initialise the list of available lookups while running
3483 as root. All dynamically modules are loaded from a directory which is
3484 hard-coded into the binary and is code which, if not a module, would be
3485 part of Exim already. Ability to modify the content of the directory
3486 is equivalent to the ability to modify a setuid binary!
3487
3488 This needs to happen before we read the main configuration. */
3489 init_lookup_list();
3490
3491 /* Read the main runtime configuration data; this gives up if there
3492 is a failure. It leaves the configuration file open so that the subsequent
3493 configuration data for delivery can be read if needed. */
3494
3495 readconf_main();
3496
3497 /* Handle the decoding of logging options. */
3498
3499 decode_bits(&log_write_selector, &log_extra_selector, 0, 0,
3500 log_selector_string, log_options, log_options_count, US"log", 0);
3501
3502 DEBUG(D_any)
3503 {
3504 debug_printf("configuration file is %s\n", config_main_filename);
3505 debug_printf("log selectors = %08x %08x\n", log_write_selector,
3506 log_extra_selector);
3507 }
3508
3509 /* If domain literals are not allowed, check the sender address that was
3510 supplied with -f. Ditto for a stripped trailing dot. */
3511
3512 if (sender_address != NULL)
3513 {
3514 if (sender_address[sender_address_domain] == '[' && !allow_domain_literals)
3515 {
3516 fprintf(stderr, "exim: bad -f address \"%s\": domain literals not "
3517 "allowed\n", sender_address);
3518 return EXIT_FAILURE;
3519 }
3520 if (f_end_dot && !strip_trailing_dot)
3521 {
3522 fprintf(stderr, "exim: bad -f address \"%s.\": domain is malformed "
3523 "(trailing dot not allowed)\n", sender_address);
3524 return EXIT_FAILURE;
3525 }
3526 }
3527
3528 /* Paranoia check of maximum lengths of certain strings. There is a check
3529 on the length of the log file path in log.c, which will come into effect
3530 if there are any calls to write the log earlier than this. However, if we
3531 get this far but the string is very long, it is better to stop now than to
3532 carry on and (e.g.) receive a message and then have to collapse. The call to
3533 log_write() from here will cause the ultimate panic collapse if the complete
3534 file name exceeds the buffer length. */
3535
3536 if (Ustrlen(log_file_path) > 200)
3537 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3538 "log_file_path is longer than 200 chars: aborting");
3539