cc3172dc095730bf1edf0fb44c9a0a90de4bf7a9
[exim.git] / src / src / exim.c
1 /*************************************************
2 * Exim - an Internet mail transport agent *
3 *************************************************/
4
5 /* Copyright (c) University of Cambridge 1995 - 2015 */
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 #ifdef USE_GNUTLS
16 # include <gnutls/gnutls.h>
17 # if GNUTLS_VERSION_NUMBER < 0x030103 && !defined(DISABLE_OCSP)
18 # define DISABLE_OCSP
19 # endif
20 #endif
21
22 extern void init_lookup_list(void);
23
24
25
26 /*************************************************
27 * Function interface to store functions *
28 *************************************************/
29
30 /* We need some real functions to pass to the PCRE regular expression library
31 for store allocation via Exim's store manager. The normal calls are actually
32 macros that pass over location information to make tracing easier. These
33 functions just interface to the standard macro calls. A good compiler will
34 optimize out the tail recursion and so not make them too expensive. There
35 are two sets of functions; one for use when we want to retain the compiled
36 regular expression for a long time; the other for short-term use. */
37
38 static void *
39 function_store_get(size_t size)
40 {
41 return store_get((int)size);
42 }
43
44 static void
45 function_dummy_free(void *block) { block = block; }
46
47 static void *
48 function_store_malloc(size_t size)
49 {
50 return store_malloc((int)size);
51 }
52
53 static void
54 function_store_free(void *block)
55 {
56 store_free(block);
57 }
58
59
60
61
62 /*************************************************
63 * Enums for cmdline interface *
64 *************************************************/
65
66 enum commandline_info { CMDINFO_NONE=0,
67 CMDINFO_HELP, CMDINFO_SIEVE, CMDINFO_DSCP };
68
69
70
71
72 /*************************************************
73 * Compile regular expression and panic on fail *
74 *************************************************/
75
76 /* This function is called when failure to compile a regular expression leads
77 to a panic exit. In other cases, pcre_compile() is called directly. In many
78 cases where this function is used, the results of the compilation are to be
79 placed in long-lived store, so we temporarily reset the store management
80 functions that PCRE uses if the use_malloc flag is set.
81
82 Argument:
83 pattern the pattern to compile
84 caseless TRUE if caseless matching is required
85 use_malloc TRUE if compile into malloc store
86
87 Returns: pointer to the compiled pattern
88 */
89
90 const pcre *
91 regex_must_compile(const uschar *pattern, BOOL caseless, BOOL use_malloc)
92 {
93 int offset;
94 int options = PCRE_COPT;
95 const pcre *yield;
96 const uschar *error;
97 if (use_malloc)
98 {
99 pcre_malloc = function_store_malloc;
100 pcre_free = function_store_free;
101 }
102 if (caseless) options |= PCRE_CASELESS;
103 yield = pcre_compile(CCS pattern, options, (const char **)&error, &offset, NULL);
104 pcre_malloc = function_store_get;
105 pcre_free = function_dummy_free;
106 if (yield == NULL)
107 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "regular expression error: "
108 "%s at offset %d while compiling %s", error, offset, pattern);
109 return yield;
110 }
111
112
113
114
115 /*************************************************
116 * Execute regular expression and set strings *
117 *************************************************/
118
119 /* This function runs a regular expression match, and sets up the pointers to
120 the matched substrings.
121
122 Arguments:
123 re the compiled expression
124 subject the subject string
125 options additional PCRE options
126 setup if < 0 do full setup
127 if >= 0 setup from setup+1 onwards,
128 excluding the full matched string
129
130 Returns: TRUE or FALSE
131 */
132
133 BOOL
134 regex_match_and_setup(const pcre *re, const uschar *subject, int options, int setup)
135 {
136 int ovector[3*(EXPAND_MAXN+1)];
137 uschar * s = string_copy(subject); /* de-constifying */
138 int n = pcre_exec(re, NULL, CS s, Ustrlen(s), 0,
139 PCRE_EOPT | options, ovector, sizeof(ovector)/sizeof(int));
140 BOOL yield = n >= 0;
141 if (n == 0) n = EXPAND_MAXN + 1;
142 if (yield)
143 {
144 int nn;
145 expand_nmax = (setup < 0)? 0 : setup + 1;
146 for (nn = (setup < 0)? 0 : 2; nn < n*2; nn += 2)
147 {
148 expand_nstring[expand_nmax] = s + ovector[nn];
149 expand_nlength[expand_nmax++] = ovector[nn+1] - ovector[nn];
150 }
151 expand_nmax--;
152 }
153 return yield;
154 }
155
156
157
158
159 /*************************************************
160 * Set up processing details *
161 *************************************************/
162
163 /* Save a text string for dumping when SIGUSR1 is received.
164 Do checks for overruns.
165
166 Arguments: format and arguments, as for printf()
167 Returns: nothing
168 */
169
170 void
171 set_process_info(const char *format, ...)
172 {
173 int len;
174 va_list ap;
175 sprintf(CS process_info, "%5d ", (int)getpid());
176 len = Ustrlen(process_info);
177 va_start(ap, format);
178 if (!string_vformat(process_info + len, PROCESS_INFO_SIZE - len - 2, format, ap))
179 Ustrcpy(process_info + len, "**** string overflowed buffer ****");
180 len = Ustrlen(process_info);
181 process_info[len+0] = '\n';
182 process_info[len+1] = '\0';
183 process_info_len = len + 1;
184 DEBUG(D_process_info) debug_printf("set_process_info: %s", process_info);
185 va_end(ap);
186 }
187
188
189
190
191 /*************************************************
192 * Handler for SIGUSR1 *
193 *************************************************/
194
195 /* SIGUSR1 causes any exim process to write to the process log details of
196 what it is currently doing. It will only be used if the OS is capable of
197 setting up a handler that causes automatic restarting of any system call
198 that is in progress at the time.
199
200 This function takes care to be signal-safe.
201
202 Argument: the signal number (SIGUSR1)
203 Returns: nothing
204 */
205
206 static void
207 usr1_handler(int sig)
208 {
209 int fd;
210
211 os_restarting_signal(sig, usr1_handler);
212
213 fd = Uopen(process_log_path, O_APPEND|O_WRONLY, LOG_MODE);
214 if (fd < 0)
215 {
216 /* If we are already running as the Exim user, try to create it in the
217 current process (assuming spool_directory exists). Otherwise, if we are
218 root, do the creation in an exim:exim subprocess. */
219
220 int euid = geteuid();
221 if (euid == exim_uid)
222 fd = Uopen(process_log_path, O_CREAT|O_APPEND|O_WRONLY, LOG_MODE);
223 else if (euid == root_uid)
224 fd = log_create_as_exim(process_log_path);
225 }
226
227 /* If we are neither exim nor root, or if we failed to create the log file,
228 give up. There is not much useful we can do with errors, since we don't want
229 to disrupt whatever is going on outside the signal handler. */
230
231 if (fd < 0) return;
232
233 (void)write(fd, process_info, process_info_len);
234 (void)close(fd);
235 }
236
237
238
239 /*************************************************
240 * Timeout handler *
241 *************************************************/
242
243 /* This handler is enabled most of the time that Exim is running. The handler
244 doesn't actually get used unless alarm() has been called to set a timer, to
245 place a time limit on a system call of some kind. When the handler is run, it
246 re-enables itself.
247
248 There are some other SIGALRM handlers that are used in special cases when more
249 than just a flag setting is required; for example, when reading a message's
250 input. These are normally set up in the code module that uses them, and the
251 SIGALRM handler is reset to this one afterwards.
252
253 Argument: the signal value (SIGALRM)
254 Returns: nothing
255 */
256
257 void
258 sigalrm_handler(int sig)
259 {
260 sig = sig; /* Keep picky compilers happy */
261 sigalrm_seen = TRUE;
262 os_non_restarting_signal(SIGALRM, sigalrm_handler);
263 }
264
265
266
267 /*************************************************
268 * Sleep for a fractional time interval *
269 *************************************************/
270
271 /* This function is called by millisleep() and exim_wait_tick() to wait for a
272 period of time that may include a fraction of a second. The coding is somewhat
273 tedious. We do not expect setitimer() ever to fail, but if it does, the process
274 will wait for ever, so we panic in this instance. (There was a case of this
275 when a bug in a function that calls milliwait() caused it to pass invalid data.
276 That's when I added the check. :-)
277
278 We assume it to be not worth sleeping for under 100us; this value will
279 require revisiting as hardware advances. This avoids the issue of
280 a zero-valued timer setting meaning "never fire".
281
282 Argument: an itimerval structure containing the interval
283 Returns: nothing
284 */
285
286 static void
287 milliwait(struct itimerval *itval)
288 {
289 sigset_t sigmask;
290 sigset_t old_sigmask;
291
292 if (itval->it_value.tv_usec < 100 && itval->it_value.tv_sec == 0)
293 return;
294 (void)sigemptyset(&sigmask); /* Empty mask */
295 (void)sigaddset(&sigmask, SIGALRM); /* Add SIGALRM */
296 (void)sigprocmask(SIG_BLOCK, &sigmask, &old_sigmask); /* Block SIGALRM */
297 if (setitimer(ITIMER_REAL, itval, NULL) < 0) /* Start timer */
298 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
299 "setitimer() failed: %s", strerror(errno));
300 (void)sigfillset(&sigmask); /* All signals */
301 (void)sigdelset(&sigmask, SIGALRM); /* Remove SIGALRM */
302 (void)sigsuspend(&sigmask); /* Until SIGALRM */
303 (void)sigprocmask(SIG_SETMASK, &old_sigmask, NULL); /* Restore mask */
304 }
305
306
307
308
309 /*************************************************
310 * Millisecond sleep function *
311 *************************************************/
312
313 /* The basic sleep() function has a granularity of 1 second, which is too rough
314 in some cases - for example, when using an increasing delay to slow down
315 spammers.
316
317 Argument: number of millseconds
318 Returns: nothing
319 */
320
321 void
322 millisleep(int msec)
323 {
324 struct itimerval itval;
325 itval.it_interval.tv_sec = 0;
326 itval.it_interval.tv_usec = 0;
327 itval.it_value.tv_sec = msec/1000;
328 itval.it_value.tv_usec = (msec % 1000) * 1000;
329 milliwait(&itval);
330 }
331
332
333
334 /*************************************************
335 * Compare microsecond times *
336 *************************************************/
337
338 /*
339 Arguments:
340 tv1 the first time
341 tv2 the second time
342
343 Returns: -1, 0, or +1
344 */
345
346 int
347 exim_tvcmp(struct timeval *t1, struct timeval *t2)
348 {
349 if (t1->tv_sec > t2->tv_sec) return +1;
350 if (t1->tv_sec < t2->tv_sec) return -1;
351 if (t1->tv_usec > t2->tv_usec) return +1;
352 if (t1->tv_usec < t2->tv_usec) return -1;
353 return 0;
354 }
355
356
357
358
359 /*************************************************
360 * Clock tick wait function *
361 *************************************************/
362
363 /* Exim uses a time + a pid to generate a unique identifier in two places: its
364 message IDs, and in file names for maildir deliveries. Because some OS now
365 re-use pids within the same second, sub-second times are now being used.
366 However, for absolute certaintly, we must ensure the clock has ticked before
367 allowing the relevant process to complete. At the time of implementation of
368 this code (February 2003), the speed of processors is such that the clock will
369 invariably have ticked already by the time a process has done its job. This
370 function prepares for the time when things are faster - and it also copes with
371 clocks that go backwards.
372
373 Arguments:
374 then_tv A timeval which was used to create uniqueness; its usec field
375 has been rounded down to the value of the resolution.
376 We want to be sure the current time is greater than this.
377 resolution The resolution that was used to divide the microseconds
378 (1 for maildir, larger for message ids)
379
380 Returns: nothing
381 */
382
383 void
384 exim_wait_tick(struct timeval *then_tv, int resolution)
385 {
386 struct timeval now_tv;
387 long int now_true_usec;
388
389 (void)gettimeofday(&now_tv, NULL);
390 now_true_usec = now_tv.tv_usec;
391 now_tv.tv_usec = (now_true_usec/resolution) * resolution;
392
393 if (exim_tvcmp(&now_tv, then_tv) <= 0)
394 {
395 struct itimerval itval;
396 itval.it_interval.tv_sec = 0;
397 itval.it_interval.tv_usec = 0;
398 itval.it_value.tv_sec = then_tv->tv_sec - now_tv.tv_sec;
399 itval.it_value.tv_usec = then_tv->tv_usec + resolution - now_true_usec;
400
401 /* We know that, overall, "now" is less than or equal to "then". Therefore, a
402 negative value for the microseconds is possible only in the case when "now"
403 is more than a second less than "then". That means that itval.it_value.tv_sec
404 is greater than zero. The following correction is therefore safe. */
405
406 if (itval.it_value.tv_usec < 0)
407 {
408 itval.it_value.tv_usec += 1000000;
409 itval.it_value.tv_sec -= 1;
410 }
411
412 DEBUG(D_transport|D_receive)
413 {
414 if (!running_in_test_harness)
415 {
416 debug_printf("tick check: " TIME_T_FMT ".%06lu " TIME_T_FMT ".%06lu\n",
417 then_tv->tv_sec, (long) then_tv->tv_usec,
418 now_tv.tv_sec, (long) now_tv.tv_usec);
419 debug_printf("waiting " TIME_T_FMT ".%06lu\n",
420 itval.it_value.tv_sec, (long) itval.it_value.tv_usec);
421 }
422 }
423
424 milliwait(&itval);
425 }
426 }
427
428
429
430
431 /*************************************************
432 * Call fopen() with umask 777 and adjust mode *
433 *************************************************/
434
435 /* Exim runs with umask(0) so that files created with open() have the mode that
436 is specified in the open() call. However, there are some files, typically in
437 the spool directory, that are created with fopen(). They end up world-writeable
438 if no precautions are taken. Although the spool directory is not accessible to
439 the world, this is an untidiness. So this is a wrapper function for fopen()
440 that sorts out the mode of the created file.
441
442 Arguments:
443 filename the file name
444 options the fopen() options
445 mode the required mode
446
447 Returns: the fopened FILE or NULL
448 */
449
450 FILE *
451 modefopen(const uschar *filename, const char *options, mode_t mode)
452 {
453 mode_t saved_umask = umask(0777);
454 FILE *f = Ufopen(filename, options);
455 (void)umask(saved_umask);
456 if (f != NULL) (void)fchmod(fileno(f), mode);
457 return f;
458 }
459
460
461
462
463 /*************************************************
464 * Ensure stdin, stdout, and stderr exist *
465 *************************************************/
466
467 /* Some operating systems grumble if an exec() happens without a standard
468 input, output, and error (fds 0, 1, 2) being defined. The worry is that some
469 file will be opened and will use these fd values, and then some other bit of
470 code will assume, for example, that it can write error messages to stderr.
471 This function ensures that fds 0, 1, and 2 are open if they do not already
472 exist, by connecting them to /dev/null.
473
474 This function is also used to ensure that std{in,out,err} exist at all times,
475 so that if any library that Exim calls tries to use them, it doesn't crash.
476
477 Arguments: None
478 Returns: Nothing
479 */
480
481 void
482 exim_nullstd(void)
483 {
484 int i;
485 int devnull = -1;
486 struct stat statbuf;
487 for (i = 0; i <= 2; i++)
488 {
489 if (fstat(i, &statbuf) < 0 && errno == EBADF)
490 {
491 if (devnull < 0) devnull = open("/dev/null", O_RDWR);
492 if (devnull < 0) log_write(0, LOG_MAIN|LOG_PANIC_DIE, "%s",
493 string_open_failed(errno, "/dev/null"));
494 if (devnull != i) (void)dup2(devnull, i);
495 }
496 }
497 if (devnull > 2) (void)close(devnull);
498 }
499
500
501
502
503 /*************************************************
504 * Close unwanted file descriptors for delivery *
505 *************************************************/
506
507 /* This function is called from a new process that has been forked to deliver
508 an incoming message, either directly, or using exec.
509
510 We want any smtp input streams to be closed in this new process. However, it
511 has been observed that using fclose() here causes trouble. When reading in -bS
512 input, duplicate copies of messages have been seen. The files will be sharing a
513 file pointer with the parent process, and it seems that fclose() (at least on
514 some systems - I saw this on Solaris 2.5.1) messes with that file pointer, at
515 least sometimes. Hence we go for closing the underlying file descriptors.
516
517 If TLS is active, we want to shut down the TLS library, but without molesting
518 the parent's SSL connection.
519
520 For delivery of a non-SMTP message, we want to close stdin and stdout (and
521 stderr unless debugging) because the calling process might have set them up as
522 pipes and be waiting for them to close before it waits for the submission
523 process to terminate. If they aren't closed, they hold up the calling process
524 until the initial delivery process finishes, which is not what we want.
525
526 Exception: We do want it for synchronous delivery!
527
528 And notwithstanding all the above, if D_resolver is set, implying resolver
529 debugging, leave stdout open, because that's where the resolver writes its
530 debugging output.
531
532 When we close stderr (which implies we've also closed stdout), we also get rid
533 of any controlling terminal.
534
535 Arguments: None
536 Returns: Nothing
537 */
538
539 static void
540 close_unwanted(void)
541 {
542 if (smtp_input)
543 {
544 #ifdef SUPPORT_TLS
545 tls_close(TRUE, FALSE); /* Shut down the TLS library */
546 #endif
547 (void)close(fileno(smtp_in));
548 (void)close(fileno(smtp_out));
549 smtp_in = NULL;
550 }
551 else
552 {
553 (void)close(0); /* stdin */
554 if ((debug_selector & D_resolver) == 0) (void)close(1); /* stdout */
555 if (debug_selector == 0) /* stderr */
556 {
557 if (!synchronous_delivery)
558 {
559 (void)close(2);
560 log_stderr = NULL;
561 }
562 (void)setsid();
563 }
564 }
565 }
566
567
568
569
570 /*************************************************
571 * Set uid and gid *
572 *************************************************/
573
574 /* This function sets a new uid and gid permanently, optionally calling
575 initgroups() to set auxiliary groups. There are some special cases when running
576 Exim in unprivileged modes. In these situations the effective uid will not be
577 root; if we already have the right effective uid/gid, and don't need to
578 initialize any groups, leave things as they are.
579
580 Arguments:
581 uid the uid
582 gid the gid
583 igflag TRUE if initgroups() wanted
584 msg text to use in debugging output and failure log
585
586 Returns: nothing; bombs out on failure
587 */
588
589 void
590 exim_setugid(uid_t uid, gid_t gid, BOOL igflag, uschar *msg)
591 {
592 uid_t euid = geteuid();
593 gid_t egid = getegid();
594
595 if (euid == root_uid || euid != uid || egid != gid || igflag)
596 {
597 /* At least one OS returns +1 for initgroups failure, so just check for
598 non-zero. */
599
600 if (igflag)
601 {
602 struct passwd *pw = getpwuid(uid);
603 if (pw != NULL)
604 {
605 if (initgroups(pw->pw_name, gid) != 0)
606 log_write(0,LOG_MAIN|LOG_PANIC_DIE,"initgroups failed for uid=%ld: %s",
607 (long int)uid, strerror(errno));
608 }
609 else log_write(0, LOG_MAIN|LOG_PANIC_DIE, "cannot run initgroups(): "
610 "no passwd entry for uid=%ld", (long int)uid);
611 }
612
613 if (setgid(gid) < 0 || setuid(uid) < 0)
614 {
615 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "unable to set gid=%ld or uid=%ld "
616 "(euid=%ld): %s", (long int)gid, (long int)uid, (long int)euid, msg);
617 }
618 }
619
620 /* Debugging output included uid/gid and all groups */
621
622 DEBUG(D_uid)
623 {
624 int group_count, save_errno;
625 gid_t group_list[NGROUPS_MAX];
626 debug_printf("changed uid/gid: %s\n uid=%ld gid=%ld pid=%ld\n", msg,
627 (long int)geteuid(), (long int)getegid(), (long int)getpid());
628 group_count = getgroups(NGROUPS_MAX, group_list);
629 save_errno = errno;
630 debug_printf(" auxiliary group list:");
631 if (group_count > 0)
632 {
633 int i;
634 for (i = 0; i < group_count; i++) debug_printf(" %d", (int)group_list[i]);
635 }
636 else if (group_count < 0)
637 debug_printf(" <error: %s>", strerror(save_errno));
638 else debug_printf(" <none>");
639 debug_printf("\n");
640 }
641 }
642
643
644
645
646 /*************************************************
647 * Exit point *
648 *************************************************/
649
650 /* Exim exits via this function so that it always clears up any open
651 databases.
652
653 Arguments:
654 rc return code
655
656 Returns: does not return
657 */
658
659 void
660 exim_exit(int rc)
661 {
662 search_tidyup();
663 DEBUG(D_any)
664 debug_printf(">>>>>>>>>>>>>>>> Exim pid=%d terminating with rc=%d "
665 ">>>>>>>>>>>>>>>>\n", (int)getpid(), rc);
666 exit(rc);
667 }
668
669
670
671
672 /*************************************************
673 * Extract port from host address *
674 *************************************************/
675
676 /* Called to extract the port from the values given to -oMa and -oMi.
677 It also checks the syntax of the address, and terminates it before the
678 port data when a port is extracted.
679
680 Argument:
681 address the address, with possible port on the end
682
683 Returns: the port, or zero if there isn't one
684 bombs out on a syntax error
685 */
686
687 static int
688 check_port(uschar *address)
689 {
690 int port = host_address_extract_port(address);
691 if (string_is_ip_address(address, NULL) == 0)
692 {
693 fprintf(stderr, "exim abandoned: \"%s\" is not an IP address\n", address);
694 exit(EXIT_FAILURE);
695 }
696 return port;
697 }
698
699
700
701 /*************************************************
702 * Test/verify an address *
703 *************************************************/
704
705 /* This function is called by the -bv and -bt code. It extracts a working
706 address from a full RFC 822 address. This isn't really necessary per se, but it
707 has the effect of collapsing source routes.
708
709 Arguments:
710 s the address string
711 flags flag bits for verify_address()
712 exit_value to be set for failures
713
714 Returns: nothing
715 */
716
717 static void
718 test_address(uschar *s, int flags, int *exit_value)
719 {
720 int start, end, domain;
721 uschar *parse_error = NULL;
722 uschar *address = parse_extract_address(s, &parse_error, &start, &end, &domain,
723 FALSE);
724 if (address == NULL)
725 {
726 fprintf(stdout, "syntax error: %s\n", parse_error);
727 *exit_value = 2;
728 }
729 else
730 {
731 int rc = verify_address(deliver_make_addr(address,TRUE), stdout, flags, -1,
732 -1, -1, NULL, NULL, NULL);
733 if (rc == FAIL) *exit_value = 2;
734 else if (rc == DEFER && *exit_value == 0) *exit_value = 1;
735 }
736 }
737
738
739
740 /*************************************************
741 * Show supported features *
742 *************************************************/
743
744 /* This function is called for -bV/--version and for -d to output the optional
745 features of the current Exim binary.
746
747 Arguments: a FILE for printing
748 Returns: nothing
749 */
750
751 static void
752 show_whats_supported(FILE *f)
753 {
754 auth_info *authi;
755
756 #ifdef DB_VERSION_STRING
757 fprintf(f, "Berkeley DB: %s\n", DB_VERSION_STRING);
758 #elif defined(BTREEVERSION) && defined(HASHVERSION)
759 #ifdef USE_DB
760 fprintf(f, "Probably Berkeley DB version 1.8x (native mode)\n");
761 #else
762 fprintf(f, "Probably Berkeley DB version 1.8x (compatibility mode)\n");
763 #endif
764 #elif defined(_DBM_RDONLY) || defined(dbm_dirfno)
765 fprintf(f, "Probably ndbm\n");
766 #elif defined(USE_TDB)
767 fprintf(f, "Using tdb\n");
768 #else
769 #ifdef USE_GDBM
770 fprintf(f, "Probably GDBM (native mode)\n");
771 #else
772 fprintf(f, "Probably GDBM (compatibility mode)\n");
773 #endif
774 #endif
775
776 fprintf(f, "Support for:");
777 #ifdef SUPPORT_CRYPTEQ
778 fprintf(f, " crypteq");
779 #endif
780 #if HAVE_ICONV
781 fprintf(f, " iconv()");
782 #endif
783 #if HAVE_IPV6
784 fprintf(f, " IPv6");
785 #endif
786 #ifdef HAVE_SETCLASSRESOURCES
787 fprintf(f, " use_setclassresources");
788 #endif
789 #ifdef SUPPORT_PAM
790 fprintf(f, " PAM");
791 #endif
792 #ifdef EXIM_PERL
793 fprintf(f, " Perl");
794 #endif
795 #ifdef EXPAND_DLFUNC
796 fprintf(f, " Expand_dlfunc");
797 #endif
798 #ifdef USE_TCP_WRAPPERS
799 fprintf(f, " TCPwrappers");
800 #endif
801 #ifdef SUPPORT_TLS
802 #ifdef USE_GNUTLS
803 fprintf(f, " GnuTLS");
804 #else
805 fprintf(f, " OpenSSL");
806 #endif
807 #endif
808 #ifdef SUPPORT_TRANSLATE_IP_ADDRESS
809 fprintf(f, " translate_ip_address");
810 #endif
811 #ifdef SUPPORT_MOVE_FROZEN_MESSAGES
812 fprintf(f, " move_frozen_messages");
813 #endif
814 #ifdef WITH_CONTENT_SCAN
815 fprintf(f, " Content_Scanning");
816 #endif
817 #ifdef WITH_OLD_DEMIME
818 fprintf(f, " Old_Demime");
819 #endif
820 #ifndef DISABLE_DKIM
821 fprintf(f, " DKIM");
822 #endif
823 #ifndef DISABLE_DNSSEC
824 fprintf(f, " DNSSEC");
825 #endif
826 #ifndef DISABLE_EVENT
827 fprintf(f, " Event");
828 #endif
829 #ifdef SUPPORT_I18N
830 fprintf(f, " I18N");
831 #endif
832 #ifndef DISABLE_OCSP
833 fprintf(f, " OCSP");
834 #endif
835 #ifndef DISABLE_PRDR
836 fprintf(f, " PRDR");
837 #endif
838 #ifdef SUPPORT_PROXY
839 fprintf(f, " PROXY");
840 #endif
841 #ifdef SUPPORT_SOCKS
842 fprintf(f, " SOCKS");
843 #endif
844 #ifdef EXPERIMENTAL_SPF
845 fprintf(f, " Experimental_SPF");
846 #endif
847 #ifdef EXPERIMENTAL_SRS
848 fprintf(f, " Experimental_SRS");
849 #endif
850 #ifdef EXPERIMENTAL_BRIGHTMAIL
851 fprintf(f, " Experimental_Brightmail");
852 #endif
853 #ifdef EXPERIMENTAL_DANE
854 fprintf(f, " Experimental_DANE");
855 #endif
856 #ifdef EXPERIMENTAL_DCC
857 fprintf(f, " Experimental_DCC");
858 #endif
859 #ifdef EXPERIMENTAL_DMARC
860 fprintf(f, " Experimental_DMARC");
861 #endif
862 #ifdef EXPERIMENTAL_DSN_INFO
863 fprintf(f, " Experimental_DSN_info");
864 #endif
865 fprintf(f, "\n");
866
867 fprintf(f, "Lookups (built-in):");
868 #if defined(LOOKUP_LSEARCH) && LOOKUP_LSEARCH!=2
869 fprintf(f, " lsearch wildlsearch nwildlsearch iplsearch");
870 #endif
871 #if defined(LOOKUP_CDB) && LOOKUP_CDB!=2
872 fprintf(f, " cdb");
873 #endif
874 #if defined(LOOKUP_DBM) && LOOKUP_DBM!=2
875 fprintf(f, " dbm dbmjz dbmnz");
876 #endif
877 #if defined(LOOKUP_DNSDB) && LOOKUP_DNSDB!=2
878 fprintf(f, " dnsdb");
879 #endif
880 #if defined(LOOKUP_DSEARCH) && LOOKUP_DSEARCH!=2
881 fprintf(f, " dsearch");
882 #endif
883 #if defined(LOOKUP_IBASE) && LOOKUP_IBASE!=2
884 fprintf(f, " ibase");
885 #endif
886 #if defined(LOOKUP_LDAP) && LOOKUP_LDAP!=2
887 fprintf(f, " ldap ldapdn ldapm");
888 #endif
889 #if defined(LOOKUP_MYSQL) && LOOKUP_MYSQL!=2
890 fprintf(f, " mysql");
891 #endif
892 #if defined(LOOKUP_NIS) && LOOKUP_NIS!=2
893 fprintf(f, " nis nis0");
894 #endif
895 #if defined(LOOKUP_NISPLUS) && LOOKUP_NISPLUS!=2
896 fprintf(f, " nisplus");
897 #endif
898 #if defined(LOOKUP_ORACLE) && LOOKUP_ORACLE!=2
899 fprintf(f, " oracle");
900 #endif
901 #if defined(LOOKUP_PASSWD) && LOOKUP_PASSWD!=2
902 fprintf(f, " passwd");
903 #endif
904 #if defined(LOOKUP_PGSQL) && LOOKUP_PGSQL!=2
905 fprintf(f, " pgsql");
906 #endif
907 #if defined(LOOKUP_REDIS) && LOOKUP_REDIS!=2
908 fprintf(f, " redis");
909 #endif
910 #if defined(LOOKUP_SQLITE) && LOOKUP_SQLITE!=2
911 fprintf(f, " sqlite");
912 #endif
913 #if defined(LOOKUP_TESTDB) && LOOKUP_TESTDB!=2
914 fprintf(f, " testdb");
915 #endif
916 #if defined(LOOKUP_WHOSON) && LOOKUP_WHOSON!=2
917 fprintf(f, " whoson");
918 #endif
919 fprintf(f, "\n");
920
921 fprintf(f, "Authenticators:");
922 #ifdef AUTH_CRAM_MD5
923 fprintf(f, " cram_md5");
924 #endif
925 #ifdef AUTH_CYRUS_SASL
926 fprintf(f, " cyrus_sasl");
927 #endif
928 #ifdef AUTH_DOVECOT
929 fprintf(f, " dovecot");
930 #endif
931 #ifdef AUTH_GSASL
932 fprintf(f, " gsasl");
933 #endif
934 #ifdef AUTH_HEIMDAL_GSSAPI
935 fprintf(f, " heimdal_gssapi");
936 #endif
937 #ifdef AUTH_PLAINTEXT
938 fprintf(f, " plaintext");
939 #endif
940 #ifdef AUTH_SPA
941 fprintf(f, " spa");
942 #endif
943 #ifdef AUTH_TLS
944 fprintf(f, " tls");
945 #endif
946 fprintf(f, "\n");
947
948 fprintf(f, "Routers:");
949 #ifdef ROUTER_ACCEPT
950 fprintf(f, " accept");
951 #endif
952 #ifdef ROUTER_DNSLOOKUP
953 fprintf(f, " dnslookup");
954 #endif
955 #ifdef ROUTER_IPLITERAL
956 fprintf(f, " ipliteral");
957 #endif
958 #ifdef ROUTER_IPLOOKUP
959 fprintf(f, " iplookup");
960 #endif
961 #ifdef ROUTER_MANUALROUTE
962 fprintf(f, " manualroute");
963 #endif
964 #ifdef ROUTER_QUERYPROGRAM
965 fprintf(f, " queryprogram");
966 #endif
967 #ifdef ROUTER_REDIRECT
968 fprintf(f, " redirect");
969 #endif
970 fprintf(f, "\n");
971
972 fprintf(f, "Transports:");
973 #ifdef TRANSPORT_APPENDFILE
974 fprintf(f, " appendfile");
975 #ifdef SUPPORT_MAILDIR
976 fprintf(f, "/maildir");
977 #endif
978 #ifdef SUPPORT_MAILSTORE
979 fprintf(f, "/mailstore");
980 #endif
981 #ifdef SUPPORT_MBX
982 fprintf(f, "/mbx");
983 #endif
984 #endif
985 #ifdef TRANSPORT_AUTOREPLY
986 fprintf(f, " autoreply");
987 #endif
988 #ifdef TRANSPORT_LMTP
989 fprintf(f, " lmtp");
990 #endif
991 #ifdef TRANSPORT_PIPE
992 fprintf(f, " pipe");
993 #endif
994 #ifdef TRANSPORT_SMTP
995 fprintf(f, " smtp");
996 #endif
997 fprintf(f, "\n");
998
999 if (fixed_never_users[0] > 0)
1000 {
1001 int i;
1002 fprintf(f, "Fixed never_users: ");
1003 for (i = 1; i <= (int)fixed_never_users[0] - 1; i++)
1004 fprintf(f, "%d:", (unsigned int)fixed_never_users[i]);
1005 fprintf(f, "%d\n", (unsigned int)fixed_never_users[i]);
1006 }
1007
1008 fprintf(f, "Size of off_t: " SIZE_T_FMT "\n", sizeof(off_t));
1009
1010 /* Everything else is details which are only worth reporting when debugging.
1011 Perhaps the tls_version_report should move into this too. */
1012 DEBUG(D_any) do {
1013
1014 int i;
1015
1016 /* clang defines __GNUC__ (at least, for me) so test for it first */
1017 #if defined(__clang__)
1018 fprintf(f, "Compiler: CLang [%s]\n", __clang_version__);
1019 #elif defined(__GNUC__)
1020 fprintf(f, "Compiler: GCC [%s]\n",
1021 # ifdef __VERSION__
1022 __VERSION__
1023 # else
1024 "? unknown version ?"
1025 # endif
1026 );
1027 #else
1028 fprintf(f, "Compiler: <unknown>\n");
1029 #endif
1030
1031 #ifdef SUPPORT_TLS
1032 tls_version_report(f);
1033 #endif
1034 #ifdef SUPPORT_I18N
1035 utf8_version_report(f);
1036 #endif
1037
1038 for (authi = auths_available; *authi->driver_name != '\0'; ++authi)
1039 if (authi->version_report)
1040 (*authi->version_report)(f);
1041
1042 /* PCRE_PRERELEASE is either defined and empty or a bare sequence of
1043 characters; unless it's an ancient version of PCRE in which case it
1044 is not defined. */
1045 #ifndef PCRE_PRERELEASE
1046 #define PCRE_PRERELEASE
1047 #endif
1048 #define QUOTE(X) #X
1049 #define EXPAND_AND_QUOTE(X) QUOTE(X)
1050 fprintf(f, "Library version: PCRE: Compile: %d.%d%s\n"
1051 " Runtime: %s\n",
1052 PCRE_MAJOR, PCRE_MINOR,
1053 EXPAND_AND_QUOTE(PCRE_PRERELEASE) "",
1054 pcre_version());
1055 #undef QUOTE
1056 #undef EXPAND_AND_QUOTE
1057
1058 init_lookup_list();
1059 for (i = 0; i < lookup_list_count; i++)
1060 if (lookup_list[i]->version_report)
1061 lookup_list[i]->version_report(f);
1062
1063 #ifdef WHITELIST_D_MACROS
1064 fprintf(f, "WHITELIST_D_MACROS: \"%s\"\n", WHITELIST_D_MACROS);
1065 #else
1066 fprintf(f, "WHITELIST_D_MACROS unset\n");
1067 #endif
1068 #ifdef TRUSTED_CONFIG_LIST
1069 fprintf(f, "TRUSTED_CONFIG_LIST: \"%s\"\n", TRUSTED_CONFIG_LIST);
1070 #else
1071 fprintf(f, "TRUSTED_CONFIG_LIST unset\n");
1072 #endif
1073
1074 } while (0);
1075 }
1076
1077
1078 /*************************************************
1079 * Show auxiliary information about Exim *
1080 *************************************************/
1081
1082 static void
1083 show_exim_information(enum commandline_info request, FILE *stream)
1084 {
1085 const uschar **pp;
1086
1087 switch(request)
1088 {
1089 case CMDINFO_NONE:
1090 fprintf(stream, "Oops, something went wrong.\n");
1091 return;
1092 case CMDINFO_HELP:
1093 fprintf(stream,
1094 "The -bI: flag takes a string indicating which information to provide.\n"
1095 "If the string is not recognised, you'll get this help (on stderr).\n"
1096 "\n"
1097 " exim -bI:help this information\n"
1098 " exim -bI:dscp dscp value keywords known\n"
1099 " exim -bI:sieve list of supported sieve extensions, one per line.\n"
1100 );
1101 return;
1102 case CMDINFO_SIEVE:
1103 for (pp = exim_sieve_extension_list; *pp; ++pp)
1104 fprintf(stream, "%s\n", *pp);
1105 return;
1106 case CMDINFO_DSCP:
1107 dscp_list_to_stream(stream);
1108 return;
1109 }
1110 }
1111
1112
1113 /*************************************************
1114 * Quote a local part *
1115 *************************************************/
1116
1117 /* This function is used when a sender address or a From: or Sender: header
1118 line is being created from the caller's login, or from an authenticated_id. It
1119 applies appropriate quoting rules for a local part.
1120
1121 Argument: the local part
1122 Returns: the local part, quoted if necessary
1123 */
1124
1125 uschar *
1126 local_part_quote(uschar *lpart)
1127 {
1128 BOOL needs_quote = FALSE;
1129 int size, ptr;
1130 uschar *yield;
1131 uschar *t;
1132
1133 for (t = lpart; !needs_quote && *t != 0; t++)
1134 {
1135 needs_quote = !isalnum(*t) && strchr("!#$%&'*+-/=?^_`{|}~", *t) == NULL &&
1136 (*t != '.' || t == lpart || t[1] == 0);
1137 }
1138
1139 if (!needs_quote) return lpart;
1140
1141 size = ptr = 0;
1142 yield = string_cat(NULL, &size, &ptr, US"\"", 1);
1143
1144 for (;;)
1145 {
1146 uschar *nq = US Ustrpbrk(lpart, "\\\"");
1147 if (nq == NULL)
1148 {
1149 yield = string_cat(yield, &size, &ptr, lpart, Ustrlen(lpart));
1150 break;
1151 }
1152 yield = string_cat(yield, &size, &ptr, lpart, nq - lpart);
1153 yield = string_cat(yield, &size, &ptr, US"\\", 1);
1154 yield = string_cat(yield, &size, &ptr, nq, 1);
1155 lpart = nq + 1;
1156 }
1157
1158 yield = string_cat(yield, &size, &ptr, US"\"", 1);
1159 yield[ptr] = 0;
1160 return yield;
1161 }
1162
1163
1164
1165 #ifdef USE_READLINE
1166 /*************************************************
1167 * Load readline() functions *
1168 *************************************************/
1169
1170 /* This function is called from testing executions that read data from stdin,
1171 but only when running as the calling user. Currently, only -be does this. The
1172 function loads the readline() function library and passes back the functions.
1173 On some systems, it needs the curses library, so load that too, but try without
1174 it if loading fails. All this functionality has to be requested at build time.
1175
1176 Arguments:
1177 fn_readline_ptr pointer to where to put the readline pointer
1178 fn_addhist_ptr pointer to where to put the addhistory function
1179
1180 Returns: the dlopen handle or NULL on failure
1181 */
1182
1183 static void *
1184 set_readline(char * (**fn_readline_ptr)(const char *),
1185 void (**fn_addhist_ptr)(const char *))
1186 {
1187 void *dlhandle;
1188 void *dlhandle_curses = dlopen("libcurses." DYNLIB_FN_EXT, RTLD_GLOBAL|RTLD_LAZY);
1189
1190 dlhandle = dlopen("libreadline." DYNLIB_FN_EXT, RTLD_GLOBAL|RTLD_NOW);
1191 if (dlhandle_curses != NULL) dlclose(dlhandle_curses);
1192
1193 if (dlhandle != NULL)
1194 {
1195 /* Checked manual pages; at least in GNU Readline 6.1, the prototypes are:
1196 * char * readline (const char *prompt);
1197 * void add_history (const char *string);
1198 */
1199 *fn_readline_ptr = (char *(*)(const char*))dlsym(dlhandle, "readline");
1200 *fn_addhist_ptr = (void(*)(const char*))dlsym(dlhandle, "add_history");
1201 }
1202 else
1203 {
1204 DEBUG(D_any) debug_printf("failed to load readline: %s\n", dlerror());
1205 }
1206
1207 return dlhandle;
1208 }
1209 #endif
1210
1211
1212
1213 /*************************************************
1214 * Get a line from stdin for testing things *
1215 *************************************************/
1216
1217 /* This function is called when running tests that can take a number of lines
1218 of input (for example, -be and -bt). It handles continuations and trailing
1219 spaces. And prompting and a blank line output on eof. If readline() is in use,
1220 the arguments are non-NULL and provide the relevant functions.
1221
1222 Arguments:
1223 fn_readline readline function or NULL
1224 fn_addhist addhist function or NULL
1225
1226 Returns: pointer to dynamic memory, or NULL at end of file
1227 */
1228
1229 static uschar *
1230 get_stdinput(char *(*fn_readline)(const char *), void(*fn_addhist)(const char *))
1231 {
1232 int i;
1233 int size = 0;
1234 int ptr = 0;
1235 uschar *yield = NULL;
1236
1237 if (fn_readline == NULL) { printf("> "); fflush(stdout); }
1238
1239 for (i = 0;; i++)
1240 {
1241 uschar buffer[1024];
1242 uschar *p, *ss;
1243
1244 #ifdef USE_READLINE
1245 char *readline_line = NULL;
1246 if (fn_readline != NULL)
1247 {
1248 if ((readline_line = fn_readline((i > 0)? "":"> ")) == NULL) break;
1249 if (*readline_line != 0 && fn_addhist != NULL) fn_addhist(readline_line);
1250 p = US readline_line;
1251 }
1252 else
1253 #endif
1254
1255 /* readline() not in use */
1256
1257 {
1258 if (Ufgets(buffer, sizeof(buffer), stdin) == NULL) break;
1259 p = buffer;
1260 }
1261
1262 /* Handle the line */
1263
1264 ss = p + (int)Ustrlen(p);
1265 while (ss > p && isspace(ss[-1])) ss--;
1266
1267 if (i > 0)
1268 {
1269 while (p < ss && isspace(*p)) p++; /* leading space after cont */
1270 }
1271
1272 yield = string_cat(yield, &size, &ptr, p, ss - p);
1273
1274 #ifdef USE_READLINE
1275 if (fn_readline != NULL) free(readline_line);
1276 #endif
1277
1278 if (ss == p || yield[ptr-1] != '\\')
1279 {
1280 yield[ptr] = 0;
1281 break;
1282 }
1283 yield[--ptr] = 0;
1284 }
1285
1286 if (yield == NULL) printf("\n");
1287 return yield;
1288 }
1289
1290
1291
1292 /*************************************************
1293 * Output usage information for the program *
1294 *************************************************/
1295
1296 /* This function is called when there are no recipients
1297 or a specific --help argument was added.
1298
1299 Arguments:
1300 progname information on what name we were called by
1301
1302 Returns: DOES NOT RETURN
1303 */
1304
1305 static void
1306 exim_usage(uschar *progname)
1307 {
1308
1309 /* Handle specific program invocation varients */
1310 if (Ustrcmp(progname, US"-mailq") == 0)
1311 {
1312 fprintf(stderr,
1313 "mailq - list the contents of the mail queue\n\n"
1314 "For a list of options, see the Exim documentation.\n");
1315 exit(EXIT_FAILURE);
1316 }
1317
1318 /* Generic usage - we output this whatever happens */
1319 fprintf(stderr,
1320 "Exim is a Mail Transfer Agent. It is normally called by Mail User Agents,\n"
1321 "not directly from a shell command line. Options and/or arguments control\n"
1322 "what it does when called. For a list of options, see the Exim documentation.\n");
1323
1324 exit(EXIT_FAILURE);
1325 }
1326
1327
1328
1329 /*************************************************
1330 * Validate that the macros given are okay *
1331 *************************************************/
1332
1333 /* Typically, Exim will drop privileges if macros are supplied. In some
1334 cases, we want to not do so.
1335
1336 Arguments: none (macros is a global)
1337 Returns: true if trusted, false otherwise
1338 */
1339
1340 static BOOL
1341 macros_trusted(void)
1342 {
1343 #ifdef WHITELIST_D_MACROS
1344 macro_item *m;
1345 uschar *whitelisted, *end, *p, **whites, **w;
1346 int white_count, i, n;
1347 size_t len;
1348 BOOL prev_char_item, found;
1349 #endif
1350
1351 if (macros == NULL)
1352 return TRUE;
1353 #ifndef WHITELIST_D_MACROS
1354 return FALSE;
1355 #else
1356
1357 /* We only trust -D overrides for some invoking users:
1358 root, the exim run-time user, the optional config owner user.
1359 I don't know why config-owner would be needed, but since they can own the
1360 config files anyway, there's no security risk to letting them override -D. */
1361 if ( ! ((real_uid == root_uid)
1362 || (real_uid == exim_uid)
1363 #ifdef CONFIGURE_OWNER
1364 || (real_uid == config_uid)
1365 #endif
1366 ))
1367 {
1368 debug_printf("macros_trusted rejecting macros for uid %d\n", (int) real_uid);
1369 return FALSE;
1370 }
1371
1372 /* Get a list of macros which are whitelisted */
1373 whitelisted = string_copy_malloc(US WHITELIST_D_MACROS);
1374 prev_char_item = FALSE;
1375 white_count = 0;
1376 for (p = whitelisted; *p != '\0'; ++p)
1377 {
1378 if (*p == ':' || isspace(*p))
1379 {
1380 *p = '\0';
1381 if (prev_char_item)
1382 ++white_count;
1383 prev_char_item = FALSE;
1384 continue;
1385 }
1386 if (!prev_char_item)
1387 prev_char_item = TRUE;
1388 }
1389 end = p;
1390 if (prev_char_item)
1391 ++white_count;
1392 if (!white_count)
1393 return FALSE;
1394 whites = store_malloc(sizeof(uschar *) * (white_count+1));
1395 for (p = whitelisted, i = 0; (p != end) && (i < white_count); ++p)
1396 {
1397 if (*p != '\0')
1398 {
1399 whites[i++] = p;
1400 if (i == white_count)
1401 break;
1402 while (*p != '\0' && p < end)
1403 ++p;
1404 }
1405 }
1406 whites[i] = NULL;
1407
1408 /* The list of macros should be very short. Accept the N*M complexity. */
1409 for (m = macros; m != NULL; m = m->next)
1410 {
1411 found = FALSE;
1412 for (w = whites; *w; ++w)
1413 if (Ustrcmp(*w, m->name) == 0)
1414 {
1415 found = TRUE;
1416 break;
1417 }
1418 if (!found)
1419 return FALSE;
1420 if (m->replacement == NULL)
1421 continue;
1422 len = Ustrlen(m->replacement);
1423 if (len == 0)
1424 continue;
1425 n = pcre_exec(regex_whitelisted_macro, NULL, CS m->replacement, len,
1426 0, PCRE_EOPT, NULL, 0);
1427 if (n < 0)
1428 {
1429 if (n != PCRE_ERROR_NOMATCH)
1430 debug_printf("macros_trusted checking %s returned %d\n", m->name, n);
1431 return FALSE;
1432 }
1433 }
1434 DEBUG(D_any) debug_printf("macros_trusted overridden to true by whitelisting\n");
1435 return TRUE;
1436 #endif
1437 }
1438
1439
1440 /*************************************************
1441 * Entry point and high-level code *
1442 *************************************************/
1443
1444 /* Entry point for the Exim mailer. Analyse the arguments and arrange to take
1445 the appropriate action. All the necessary functions are present in the one
1446 binary. I originally thought one should split it up, but it turns out that so
1447 much of the apparatus is needed in each chunk that one might as well just have
1448 it all available all the time, which then makes the coding easier as well.
1449
1450 Arguments:
1451 argc count of entries in argv
1452 argv argument strings, with argv[0] being the program name
1453
1454 Returns: EXIT_SUCCESS if terminated successfully
1455 EXIT_FAILURE otherwise, except when a message has been sent
1456 to the sender, and -oee was given
1457 */
1458
1459 int
1460 main(int argc, char **cargv)
1461 {
1462 uschar **argv = USS cargv;
1463 int arg_receive_timeout = -1;
1464 int arg_smtp_receive_timeout = -1;
1465 int arg_error_handling = error_handling;
1466 int filter_sfd = -1;
1467 int filter_ufd = -1;
1468 int group_count;
1469 int i, rv;
1470 int list_queue_option = 0;
1471 int msg_action = 0;
1472 int msg_action_arg = -1;
1473 int namelen = (argv[0] == NULL)? 0 : Ustrlen(argv[0]);
1474 int queue_only_reason = 0;
1475 #ifdef EXIM_PERL
1476 int perl_start_option = 0;
1477 #endif
1478 int recipients_arg = argc;
1479 int sender_address_domain = 0;
1480 int test_retry_arg = -1;
1481 int test_rewrite_arg = -1;
1482 BOOL arg_queue_only = FALSE;
1483 BOOL bi_option = FALSE;
1484 BOOL checking = FALSE;
1485 BOOL count_queue = FALSE;
1486 BOOL expansion_test = FALSE;
1487 BOOL extract_recipients = FALSE;
1488 BOOL flag_G = FALSE;
1489 BOOL flag_n = FALSE;
1490 BOOL forced_delivery = FALSE;
1491 BOOL f_end_dot = FALSE;
1492 BOOL deliver_give_up = FALSE;
1493 BOOL list_queue = FALSE;
1494 BOOL list_options = FALSE;
1495 BOOL list_config = FALSE;
1496 BOOL local_queue_only;
1497 BOOL more = TRUE;
1498 BOOL one_msg_action = FALSE;
1499 BOOL queue_only_set = FALSE;
1500 BOOL receiving_message = TRUE;
1501 BOOL sender_ident_set = FALSE;
1502 BOOL session_local_queue_only;
1503 BOOL unprivileged;
1504 BOOL removed_privilege = FALSE;
1505 BOOL usage_wanted = FALSE;
1506 BOOL verify_address_mode = FALSE;
1507 BOOL verify_as_sender = FALSE;
1508 BOOL version_printed = FALSE;
1509 uschar *alias_arg = NULL;
1510 uschar *called_as = US"";
1511 uschar *cmdline_syslog_name = NULL;
1512 uschar *start_queue_run_id = NULL;
1513 uschar *stop_queue_run_id = NULL;
1514 uschar *expansion_test_message = NULL;
1515 uschar *ftest_domain = NULL;
1516 uschar *ftest_localpart = NULL;
1517 uschar *ftest_prefix = NULL;
1518 uschar *ftest_suffix = NULL;
1519 uschar *log_oneline = NULL;
1520 uschar *malware_test_file = NULL;
1521 uschar *real_sender_address;
1522 uschar *originator_home = US"/";
1523 size_t sz;
1524 void *reset_point;
1525
1526 struct passwd *pw;
1527 struct stat statbuf;
1528 pid_t passed_qr_pid = (pid_t)0;
1529 int passed_qr_pipe = -1;
1530 gid_t group_list[NGROUPS_MAX];
1531
1532 /* For the -bI: flag */
1533 enum commandline_info info_flag = CMDINFO_NONE;
1534 BOOL info_stdout = FALSE;
1535
1536 /* Possible options for -R and -S */
1537
1538 static uschar *rsopts[] = { US"f", US"ff", US"r", US"rf", US"rff" };
1539
1540 /* Need to define this in case we need to change the environment in order
1541 to get rid of a bogus time zone. We have to make it char rather than uschar
1542 because some OS define it in /usr/include/unistd.h. */
1543
1544 extern char **environ;
1545
1546 /* If the Exim user and/or group and/or the configuration file owner/group were
1547 defined by ref:name at build time, we must now find the actual uid/gid values.
1548 This is a feature to make the lives of binary distributors easier. */
1549
1550 #ifdef EXIM_USERNAME
1551 if (route_finduser(US EXIM_USERNAME, &pw, &exim_uid))
1552 {
1553 if (exim_uid == 0)
1554 {
1555 fprintf(stderr, "exim: refusing to run with uid 0 for \"%s\"\n",
1556 EXIM_USERNAME);
1557 exit(EXIT_FAILURE);
1558 }
1559 /* If ref:name uses a number as the name, route_finduser() returns
1560 TRUE with exim_uid set and pw coerced to NULL. */
1561 if (pw)
1562 exim_gid = pw->pw_gid;
1563 #ifndef EXIM_GROUPNAME
1564 else
1565 {
1566 fprintf(stderr,
1567 "exim: ref:name should specify a usercode, not a group.\n"
1568 "exim: can't let you get away with it unless you also specify a group.\n");
1569 exit(EXIT_FAILURE);
1570 }
1571 #endif
1572 }
1573 else
1574 {
1575 fprintf(stderr, "exim: failed to find uid for user name \"%s\"\n",
1576 EXIM_USERNAME);
1577 exit(EXIT_FAILURE);
1578 }
1579 #endif
1580
1581 #ifdef EXIM_GROUPNAME
1582 if (!route_findgroup(US EXIM_GROUPNAME, &exim_gid))
1583 {
1584 fprintf(stderr, "exim: failed to find gid for group name \"%s\"\n",
1585 EXIM_GROUPNAME);
1586 exit(EXIT_FAILURE);
1587 }
1588 #endif
1589
1590 #ifdef CONFIGURE_OWNERNAME
1591 if (!route_finduser(US CONFIGURE_OWNERNAME, NULL, &config_uid))
1592 {
1593 fprintf(stderr, "exim: failed to find uid for user name \"%s\"\n",
1594 CONFIGURE_OWNERNAME);
1595 exit(EXIT_FAILURE);
1596 }
1597 #endif
1598
1599 /* We default the system_filter_user to be the Exim run-time user, as a
1600 sane non-root value. */
1601 system_filter_uid = exim_uid;
1602
1603 #ifdef CONFIGURE_GROUPNAME
1604 if (!route_findgroup(US CONFIGURE_GROUPNAME, &config_gid))
1605 {
1606 fprintf(stderr, "exim: failed to find gid for group name \"%s\"\n",
1607 CONFIGURE_GROUPNAME);
1608 exit(EXIT_FAILURE);
1609 }
1610 #endif
1611
1612 /* In the Cygwin environment, some initialization used to need doing.
1613 It was fudged in by means of this macro; now no longer but we'll leave
1614 it in case of others. */
1615
1616 #ifdef OS_INIT
1617 OS_INIT
1618 #endif
1619
1620 /* Check a field which is patched when we are running Exim within its
1621 testing harness; do a fast initial check, and then the whole thing. */
1622
1623 running_in_test_harness =
1624 *running_status == '<' && Ustrcmp(running_status, "<<<testing>>>") == 0;
1625
1626 /* The C standard says that the equivalent of setlocale(LC_ALL, "C") is obeyed
1627 at the start of a program; however, it seems that some environments do not
1628 follow this. A "strange" locale can affect the formatting of timestamps, so we
1629 make quite sure. */
1630
1631 setlocale(LC_ALL, "C");
1632
1633 /* Set up the default handler for timing using alarm(). */
1634
1635 os_non_restarting_signal(SIGALRM, sigalrm_handler);
1636
1637 /* Ensure we have a buffer for constructing log entries. Use malloc directly,
1638 because store_malloc writes a log entry on failure. */
1639
1640 log_buffer = (uschar *)malloc(LOG_BUFFER_SIZE);
1641 if (log_buffer == NULL)
1642 {
1643 fprintf(stderr, "exim: failed to get store for log buffer\n");
1644 exit(EXIT_FAILURE);
1645 }
1646
1647 /* Initialize the default log options. */
1648
1649 bits_set(log_selector, log_selector_size, log_default);
1650
1651 /* Set log_stderr to stderr, provided that stderr exists. This gets reset to
1652 NULL when the daemon is run and the file is closed. We have to use this
1653 indirection, because some systems don't allow writing to the variable "stderr".
1654 */
1655
1656 if (fstat(fileno(stderr), &statbuf) >= 0) log_stderr = stderr;
1657
1658 /* Arrange for the PCRE regex library to use our store functions. Note that
1659 the normal calls are actually macros that add additional arguments for
1660 debugging purposes so we have to assign specially constructed functions here.
1661 The default is to use store in the stacking pool, but this is overridden in the
1662 regex_must_compile() function. */
1663
1664 pcre_malloc = function_store_get;
1665 pcre_free = function_dummy_free;
1666
1667 /* Ensure there is a big buffer for temporary use in several places. It is put
1668 in malloc store so that it can be freed for enlargement if necessary. */
1669
1670 big_buffer = store_malloc(big_buffer_size);
1671
1672 /* Set up the handler for the data request signal, and set the initial
1673 descriptive text. */
1674
1675 set_process_info("initializing");
1676 os_restarting_signal(SIGUSR1, usr1_handler);
1677
1678 /* SIGHUP is used to get the daemon to reconfigure. It gets set as appropriate
1679 in the daemon code. For the rest of Exim's uses, we ignore it. */
1680
1681 signal(SIGHUP, SIG_IGN);
1682
1683 /* We don't want to die on pipe errors as the code is written to handle
1684 the write error instead. */
1685
1686 signal(SIGPIPE, SIG_IGN);
1687
1688 /* Under some circumstance on some OS, Exim can get called with SIGCHLD
1689 set to SIG_IGN. This causes subprocesses that complete before the parent
1690 process waits for them not to hang around, so when Exim calls wait(), nothing
1691 is there. The wait() code has been made robust against this, but let's ensure
1692 that SIGCHLD is set to SIG_DFL, because it's tidier to wait and get a process
1693 ending status. We use sigaction rather than plain signal() on those OS where
1694 SA_NOCLDWAIT exists, because we want to be sure it is turned off. (There was a
1695 problem on AIX with this.) */
1696
1697 #ifdef SA_NOCLDWAIT
1698 {
1699 struct sigaction act;
1700 act.sa_handler = SIG_DFL;
1701 sigemptyset(&(act.sa_mask));
1702 act.sa_flags = 0;
1703 sigaction(SIGCHLD, &act, NULL);
1704 }
1705 #else
1706 signal(SIGCHLD, SIG_DFL);
1707 #endif
1708
1709 /* Save the arguments for use if we re-exec exim as a daemon after receiving
1710 SIGHUP. */
1711
1712 sighup_argv = argv;
1713
1714 /* Set up the version number. Set up the leading 'E' for the external form of
1715 message ids, set the pointer to the internal form, and initialize it to
1716 indicate no message being processed. */
1717
1718 version_init();
1719 message_id_option[0] = '-';
1720 message_id_external = message_id_option + 1;
1721 message_id_external[0] = 'E';
1722 message_id = message_id_external + 1;
1723 message_id[0] = 0;
1724
1725 /* Set the umask to zero so that any files Exim creates using open() are
1726 created with the modes that it specifies. NOTE: Files created with fopen() have
1727 a problem, which was not recognized till rather late (February 2006). With this
1728 umask, such files will be world writeable. (They are all content scanning files
1729 in the spool directory, which isn't world-accessible, so this is not a
1730 disaster, but it's untidy.) I don't want to change this overall setting,
1731 however, because it will interact badly with the open() calls. Instead, there's
1732 now a function called modefopen() that fiddles with the umask while calling
1733 fopen(). */
1734
1735 (void)umask(0);
1736
1737 /* Precompile the regular expression for matching a message id. Keep this in
1738 step with the code that generates ids in the accept.c module. We need to do
1739 this here, because the -M options check their arguments for syntactic validity
1740 using mac_ismsgid, which uses this. */
1741
1742 regex_ismsgid =
1743 regex_must_compile(US"^(?:[^\\W_]{6}-){2}[^\\W_]{2}$", FALSE, TRUE);
1744
1745 /* Precompile the regular expression that is used for matching an SMTP error
1746 code, possibly extended, at the start of an error message. Note that the
1747 terminating whitespace character is included. */
1748
1749 regex_smtp_code =
1750 regex_must_compile(US"^\\d\\d\\d\\s(?:\\d\\.\\d\\d?\\d?\\.\\d\\d?\\d?\\s)?",
1751 FALSE, TRUE);
1752
1753 #ifdef WHITELIST_D_MACROS
1754 /* Precompile the regular expression used to filter the content of macros
1755 given to -D for permissibility. */
1756
1757 regex_whitelisted_macro =
1758 regex_must_compile(US"^[A-Za-z0-9_/.-]*$", FALSE, TRUE);
1759 #endif
1760
1761 for (i = 0; i < REGEX_VARS; i++) regex_vars[i] = NULL;
1762
1763 /* If the program is called as "mailq" treat it as equivalent to "exim -bp";
1764 this seems to be a generally accepted convention, since one finds symbolic
1765 links called "mailq" in standard OS configurations. */
1766
1767 if ((namelen == 5 && Ustrcmp(argv[0], "mailq") == 0) ||
1768 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/mailq", 6) == 0))
1769 {
1770 list_queue = TRUE;
1771 receiving_message = FALSE;
1772 called_as = US"-mailq";
1773 }
1774
1775 /* If the program is called as "rmail" treat it as equivalent to
1776 "exim -i -oee", thus allowing UUCP messages to be input using non-SMTP mode,
1777 i.e. preventing a single dot on a line from terminating the message, and
1778 returning with zero return code, even in cases of error (provided an error
1779 message has been sent). */
1780
1781 if ((namelen == 5 && Ustrcmp(argv[0], "rmail") == 0) ||
1782 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/rmail", 6) == 0))
1783 {
1784 dot_ends = FALSE;
1785 called_as = US"-rmail";
1786 errors_sender_rc = EXIT_SUCCESS;
1787 }
1788
1789 /* If the program is called as "rsmtp" treat it as equivalent to "exim -bS";
1790 this is a smail convention. */
1791
1792 if ((namelen == 5 && Ustrcmp(argv[0], "rsmtp") == 0) ||
1793 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/rsmtp", 6) == 0))
1794 {
1795 smtp_input = smtp_batched_input = TRUE;
1796 called_as = US"-rsmtp";
1797 }
1798
1799 /* If the program is called as "runq" treat it as equivalent to "exim -q";
1800 this is a smail convention. */
1801
1802 if ((namelen == 4 && Ustrcmp(argv[0], "runq") == 0) ||
1803 (namelen > 4 && Ustrncmp(argv[0] + namelen - 5, "/runq", 5) == 0))
1804 {
1805 queue_interval = 0;
1806 receiving_message = FALSE;
1807 called_as = US"-runq";
1808 }
1809
1810 /* If the program is called as "newaliases" treat it as equivalent to
1811 "exim -bi"; this is a sendmail convention. */
1812
1813 if ((namelen == 10 && Ustrcmp(argv[0], "newaliases") == 0) ||
1814 (namelen > 10 && Ustrncmp(argv[0] + namelen - 11, "/newaliases", 11) == 0))
1815 {
1816 bi_option = TRUE;
1817 receiving_message = FALSE;
1818 called_as = US"-newaliases";
1819 }
1820
1821 /* Save the original effective uid for a couple of uses later. It should
1822 normally be root, but in some esoteric environments it may not be. */
1823
1824 original_euid = geteuid();
1825
1826 /* Get the real uid and gid. If the caller is root, force the effective uid/gid
1827 to be the same as the real ones. This makes a difference only if Exim is setuid
1828 (or setgid) to something other than root, which could be the case in some
1829 special configurations. */
1830
1831 real_uid = getuid();
1832 real_gid = getgid();
1833
1834 if (real_uid == root_uid)
1835 {
1836 rv = setgid(real_gid);
1837 if (rv)
1838 {
1839 fprintf(stderr, "exim: setgid(%ld) failed: %s\n",
1840 (long int)real_gid, strerror(errno));
1841 exit(EXIT_FAILURE);
1842 }
1843 rv = setuid(real_uid);
1844 if (rv)
1845 {
1846 fprintf(stderr, "exim: setuid(%ld) failed: %s\n",
1847 (long int)real_uid, strerror(errno));
1848 exit(EXIT_FAILURE);
1849 }
1850 }
1851
1852 /* If neither the original real uid nor the original euid was root, Exim is
1853 running in an unprivileged state. */
1854
1855 unprivileged = (real_uid != root_uid && original_euid != root_uid);
1856
1857 /* Scan the program's arguments. Some can be dealt with right away; others are
1858 simply recorded for checking and handling afterwards. Do a high-level switch
1859 on the second character (the one after '-'), to save some effort. */
1860
1861 for (i = 1; i < argc; i++)
1862 {
1863 BOOL badarg = FALSE;
1864 uschar *arg = argv[i];
1865 uschar *argrest;
1866 int switchchar;
1867
1868 /* An argument not starting with '-' is the start of a recipients list;
1869 break out of the options-scanning loop. */
1870
1871 if (arg[0] != '-')
1872 {
1873 recipients_arg = i;
1874 break;
1875 }
1876
1877 /* An option consistion of -- terminates the options */
1878
1879 if (Ustrcmp(arg, "--") == 0)
1880 {
1881 recipients_arg = i + 1;
1882 break;
1883 }
1884
1885 /* Handle flagged options */
1886
1887 switchchar = arg[1];
1888 argrest = arg+2;
1889
1890 /* Make all -ex options synonymous with -oex arguments, since that
1891 is assumed by various callers. Also make -qR options synonymous with -R
1892 options, as that seems to be required as well. Allow for -qqR too, and
1893 the same for -S options. */
1894
1895 if (Ustrncmp(arg+1, "oe", 2) == 0 ||
1896 Ustrncmp(arg+1, "qR", 2) == 0 ||
1897 Ustrncmp(arg+1, "qS", 2) == 0)
1898 {
1899 switchchar = arg[2];
1900 argrest++;
1901 }
1902 else if (Ustrncmp(arg+1, "qqR", 3) == 0 || Ustrncmp(arg+1, "qqS", 3) == 0)
1903 {
1904 switchchar = arg[3];
1905 argrest += 2;
1906 queue_2stage = TRUE;
1907 }
1908
1909 /* Make -r synonymous with -f, since it is a documented alias */
1910
1911 else if (arg[1] == 'r') switchchar = 'f';
1912
1913 /* Make -ov synonymous with -v */
1914
1915 else if (Ustrcmp(arg, "-ov") == 0)
1916 {
1917 switchchar = 'v';
1918 argrest++;
1919 }
1920
1921 /* deal with --option_aliases */
1922 else if (switchchar == '-')
1923 {
1924 if (Ustrcmp(argrest, "help") == 0)
1925 {
1926 usage_wanted = TRUE;
1927 break;
1928 }
1929 else if (Ustrcmp(argrest, "version") == 0)
1930 {
1931 switchchar = 'b';
1932 argrest = US"V";
1933 }
1934 }
1935
1936 /* High-level switch on active initial letter */
1937
1938 switch(switchchar)
1939 {
1940
1941 /* sendmail uses -Ac and -Am to control which .cf file is used;
1942 we ignore them. */
1943 case 'A':
1944 if (*argrest == '\0') { badarg = TRUE; break; }
1945 else
1946 {
1947 BOOL ignore = FALSE;
1948 switch (*argrest)
1949 {
1950 case 'c':
1951 case 'm':
1952 if (*(argrest + 1) == '\0')
1953 ignore = TRUE;
1954 break;
1955 }
1956 if (!ignore) { badarg = TRUE; break; }
1957 }
1958 break;
1959
1960 /* -Btype is a sendmail option for 7bit/8bit setting. Exim is 8-bit clean
1961 so has no need of it. */
1962
1963 case 'B':
1964 if (*argrest == 0) i++; /* Skip over the type */
1965 break;
1966
1967
1968 case 'b':
1969 receiving_message = FALSE; /* Reset TRUE for -bm, -bS, -bs below */
1970
1971 /* -bd: Run in daemon mode, awaiting SMTP connections.
1972 -bdf: Ditto, but in the foreground.
1973 */
1974
1975 if (*argrest == 'd')
1976 {
1977 daemon_listen = TRUE;
1978 if (*(++argrest) == 'f') background_daemon = FALSE;
1979 else if (*argrest != 0) { badarg = TRUE; break; }
1980 }
1981
1982 /* -be: Run in expansion test mode
1983 -bem: Ditto, but read a message from a file first
1984 */
1985
1986 else if (*argrest == 'e')
1987 {
1988 expansion_test = checking = TRUE;
1989 if (argrest[1] == 'm')
1990 {
1991 if (++i >= argc) { badarg = TRUE; break; }
1992 expansion_test_message = argv[i];
1993 argrest++;
1994 }
1995 if (argrest[1] != 0) { badarg = TRUE; break; }
1996 }
1997
1998 /* -bF: Run system filter test */
1999
2000 else if (*argrest == 'F')
2001 {
2002 filter_test |= checking = FTEST_SYSTEM;
2003 if (*(++argrest) != 0) { badarg = TRUE; break; }
2004 if (++i < argc) filter_test_sfile = argv[i]; else
2005 {
2006 fprintf(stderr, "exim: file name expected after %s\n", argv[i-1]);
2007 exit(EXIT_FAILURE);
2008 }
2009 }
2010
2011 /* -bf: Run user filter test
2012 -bfd: Set domain for filter testing
2013 -bfl: Set local part for filter testing
2014 -bfp: Set prefix for filter testing
2015 -bfs: Set suffix for filter testing
2016 */
2017
2018 else if (*argrest == 'f')
2019 {
2020 if (*(++argrest) == 0)
2021 {
2022 filter_test |= checking = FTEST_USER;
2023 if (++i < argc) filter_test_ufile = argv[i]; else
2024 {
2025 fprintf(stderr, "exim: file name expected after %s\n", argv[i-1]);
2026 exit(EXIT_FAILURE);
2027 }
2028 }
2029 else
2030 {
2031 if (++i >= argc)
2032 {
2033 fprintf(stderr, "exim: string expected after %s\n", arg);
2034 exit(EXIT_FAILURE);
2035 }
2036 if (Ustrcmp(argrest, "d") == 0) ftest_domain = argv[i];
2037 else if (Ustrcmp(argrest, "l") == 0) ftest_localpart = argv[i];
2038 else if (Ustrcmp(argrest, "p") == 0) ftest_prefix = argv[i];
2039 else if (Ustrcmp(argrest, "s") == 0) ftest_suffix = argv[i];
2040 else { badarg = TRUE; break; }
2041 }
2042 }
2043
2044 /* -bh: Host checking - an IP address must follow. */
2045
2046 else if (Ustrcmp(argrest, "h") == 0 || Ustrcmp(argrest, "hc") == 0)
2047 {
2048 if (++i >= argc) { badarg = TRUE; break; }
2049 sender_host_address = argv[i];
2050 host_checking = checking = log_testing_mode = TRUE;
2051 host_checking_callout = argrest[1] == 'c';
2052 }
2053
2054 /* -bi: This option is used by sendmail to initialize *the* alias file,
2055 though it has the -oA option to specify a different file. Exim has no
2056 concept of *the* alias file, but since Sun's YP make script calls
2057 sendmail this way, some support must be provided. */
2058
2059 else if (Ustrcmp(argrest, "i") == 0) bi_option = TRUE;
2060
2061 /* -bI: provide information, of the type to follow after a colon.
2062 This is an Exim flag. */
2063
2064 else if (argrest[0] == 'I' && Ustrlen(argrest) >= 2 && argrest[1] == ':')
2065 {
2066 uschar *p = &argrest[2];
2067 info_flag = CMDINFO_HELP;
2068 if (Ustrlen(p))
2069 {
2070 if (strcmpic(p, CUS"sieve") == 0)
2071 {
2072 info_flag = CMDINFO_SIEVE;
2073 info_stdout = TRUE;
2074 }
2075 else if (strcmpic(p, CUS"dscp") == 0)
2076 {
2077 info_flag = CMDINFO_DSCP;
2078 info_stdout = TRUE;
2079 }
2080 else if (strcmpic(p, CUS"help") == 0)
2081 {
2082 info_stdout = TRUE;
2083 }
2084 }
2085 }
2086
2087 /* -bm: Accept and deliver message - the default option. Reinstate
2088 receiving_message, which got turned off for all -b options. */
2089
2090 else if (Ustrcmp(argrest, "m") == 0) receiving_message = TRUE;
2091
2092 /* -bmalware: test the filename given for malware */
2093
2094 else if (Ustrcmp(argrest, "malware") == 0)
2095 {
2096 if (++i >= argc) { badarg = TRUE; break; }
2097 checking = TRUE;
2098 malware_test_file = argv[i];
2099 }
2100
2101 /* -bnq: For locally originating messages, do not qualify unqualified
2102 addresses. In the envelope, this causes errors; in header lines they
2103 just get left. */
2104
2105 else if (Ustrcmp(argrest, "nq") == 0)
2106 {
2107 allow_unqualified_sender = FALSE;
2108 allow_unqualified_recipient = FALSE;
2109 }
2110
2111 /* -bpxx: List the contents of the mail queue, in various forms. If
2112 the option is -bpc, just a queue count is needed. Otherwise, if the
2113 first letter after p is r, then order is random. */
2114
2115 else if (*argrest == 'p')
2116 {
2117 if (*(++argrest) == 'c')
2118 {
2119 count_queue = TRUE;
2120 if (*(++argrest) != 0) badarg = TRUE;
2121 break;
2122 }
2123
2124 if (*argrest == 'r')
2125 {
2126 list_queue_option = 8;
2127 argrest++;
2128 }
2129 else list_queue_option = 0;
2130
2131 list_queue = TRUE;
2132
2133 /* -bp: List the contents of the mail queue, top-level only */
2134
2135 if (*argrest == 0) {}
2136
2137 /* -bpu: List the contents of the mail queue, top-level undelivered */
2138
2139 else if (Ustrcmp(argrest, "u") == 0) list_queue_option += 1;
2140
2141 /* -bpa: List the contents of the mail queue, including all delivered */
2142
2143 else if (Ustrcmp(argrest, "a") == 0) list_queue_option += 2;
2144
2145 /* Unknown after -bp[r] */
2146
2147 else
2148 {
2149 badarg = TRUE;
2150 break;
2151 }
2152 }
2153
2154
2155 /* -bP: List the configuration variables given as the address list.
2156 Force -v, so configuration errors get displayed. */
2157
2158 else if (Ustrcmp(argrest, "P") == 0)
2159 {
2160 /* -bP config: we need to setup here, because later,
2161 * when list_options is checked, the config is read already */
2162 if (argv[i+1] && Ustrcmp(argv[i+1], "config") == 0)
2163 {
2164 list_config = TRUE;
2165 readconf_save_config(version_string);
2166 }
2167 else
2168 {
2169 list_options = TRUE;
2170 debug_selector |= D_v;
2171 debug_file = stderr;
2172 }
2173 }
2174
2175 /* -brt: Test retry configuration lookup */
2176
2177 else if (Ustrcmp(argrest, "rt") == 0)
2178 {
2179 checking = TRUE;
2180 test_retry_arg = i + 1;
2181 goto END_ARG;
2182 }
2183
2184 /* -brw: Test rewrite configuration */
2185
2186 else if (Ustrcmp(argrest, "rw") == 0)
2187 {
2188 checking = TRUE;
2189 test_rewrite_arg = i + 1;
2190 goto END_ARG;
2191 }
2192
2193 /* -bS: Read SMTP commands on standard input, but produce no replies -
2194 all errors are reported by sending messages. */
2195
2196 else if (Ustrcmp(argrest, "S") == 0)
2197 smtp_input = smtp_batched_input = receiving_message = TRUE;
2198
2199 /* -bs: Read SMTP commands on standard input and produce SMTP replies
2200 on standard output. */
2201
2202 else if (Ustrcmp(argrest, "s") == 0) smtp_input = receiving_message = TRUE;
2203
2204 /* -bt: address testing mode */
2205
2206 else if (Ustrcmp(argrest, "t") == 0)
2207 address_test_mode = checking = log_testing_mode = TRUE;
2208
2209 /* -bv: verify addresses */
2210
2211 else if (Ustrcmp(argrest, "v") == 0)
2212 verify_address_mode = checking = log_testing_mode = TRUE;
2213
2214 /* -bvs: verify sender addresses */
2215
2216 else if (Ustrcmp(argrest, "vs") == 0)
2217 {
2218 verify_address_mode = checking = log_testing_mode = TRUE;
2219 verify_as_sender = TRUE;
2220 }
2221
2222 /* -bV: Print version string and support details */
2223
2224 else if (Ustrcmp(argrest, "V") == 0)
2225 {
2226 printf("Exim version %s #%s built %s\n", version_string,
2227 version_cnumber, version_date);
2228 printf("%s\n", CS version_copyright);
2229 version_printed = TRUE;
2230 show_whats_supported(stdout);
2231 }
2232
2233 /* -bw: inetd wait mode, accept a listening socket as stdin */
2234
2235 else if (*argrest == 'w')
2236 {
2237 inetd_wait_mode = TRUE;
2238 background_daemon = FALSE;
2239 daemon_listen = TRUE;
2240 if (*(++argrest) != '\0')
2241 {
2242 inetd_wait_timeout = readconf_readtime(argrest, 0, FALSE);
2243 if (inetd_wait_timeout <= 0)
2244 {
2245 fprintf(stderr, "exim: bad time value %s: abandoned\n", argv[i]);
2246 exit(EXIT_FAILURE);
2247 }
2248 }
2249 }
2250
2251 else badarg = TRUE;
2252 break;
2253
2254
2255 /* -C: change configuration file list; ignore if it isn't really
2256 a change! Enforce a prefix check if required. */
2257
2258 case 'C':
2259 if (*argrest == 0)
2260 {
2261 if(++i < argc) argrest = argv[i]; else
2262 { badarg = TRUE; break; }
2263 }
2264 if (Ustrcmp(config_main_filelist, argrest) != 0)
2265 {
2266 #ifdef ALT_CONFIG_PREFIX
2267 int sep = 0;
2268 int len = Ustrlen(ALT_CONFIG_PREFIX);
2269 uschar *list = argrest;
2270 uschar *filename;
2271 while((filename = string_nextinlist(&list, &sep, big_buffer,
2272 big_buffer_size)) != NULL)
2273 {
2274 if ((Ustrlen(filename) < len ||
2275 Ustrncmp(filename, ALT_CONFIG_PREFIX, len) != 0 ||
2276 Ustrstr(filename, "/../") != NULL) &&
2277 (Ustrcmp(filename, "/dev/null") != 0 || real_uid != root_uid))
2278 {
2279 fprintf(stderr, "-C Permission denied\n");
2280 exit(EXIT_FAILURE);
2281 }
2282 }
2283 #endif
2284 if (real_uid != root_uid)
2285 {
2286 #ifdef TRUSTED_CONFIG_LIST
2287
2288 if (real_uid != exim_uid
2289 #ifdef CONFIGURE_OWNER
2290 && real_uid != config_uid
2291 #endif
2292 )
2293 trusted_config = FALSE;
2294 else
2295 {
2296 FILE *trust_list = Ufopen(TRUSTED_CONFIG_LIST, "rb");
2297 if (trust_list)
2298 {
2299 struct stat statbuf;
2300
2301 if (fstat(fileno(trust_list), &statbuf) != 0 ||
2302 (statbuf.st_uid != root_uid /* owner not root */
2303 #ifdef CONFIGURE_OWNER
2304 && statbuf.st_uid != config_uid /* owner not the special one */
2305 #endif
2306 ) || /* or */
2307 (statbuf.st_gid != root_gid /* group not root */
2308 #ifdef CONFIGURE_GROUP
2309 && statbuf.st_gid != config_gid /* group not the special one */
2310 #endif
2311 && (statbuf.st_mode & 020) != 0 /* group writeable */
2312 ) || /* or */
2313 (statbuf.st_mode & 2) != 0) /* world writeable */
2314 {
2315 trusted_config = FALSE;
2316 fclose(trust_list);
2317 }
2318 else
2319 {
2320 /* Well, the trust list at least is up to scratch... */
2321 void *reset_point = store_get(0);
2322 uschar *trusted_configs[32];
2323 int nr_configs = 0;
2324 int i = 0;
2325
2326 while (Ufgets(big_buffer, big_buffer_size, trust_list))
2327 {
2328 uschar *start = big_buffer, *nl;
2329 while (*start && isspace(*start))
2330 start++;
2331 if (*start != '/')
2332 continue;
2333 nl = Ustrchr(start, '\n');
2334 if (nl)
2335 *nl = 0;
2336 trusted_configs[nr_configs++] = string_copy(start);
2337 if (nr_configs == 32)
2338 break;
2339 }
2340 fclose(trust_list);
2341
2342 if (nr_configs)
2343 {
2344 int sep = 0;
2345 const uschar *list = argrest;
2346 uschar *filename;
2347 while (trusted_config && (filename = string_nextinlist(&list,
2348 &sep, big_buffer, big_buffer_size)) != NULL)
2349 {
2350 for (i=0; i < nr_configs; i++)
2351 {
2352 if (Ustrcmp(filename, trusted_configs[i]) == 0)
2353 break;
2354 }
2355 if (i == nr_configs)
2356 {
2357 trusted_config = FALSE;
2358 break;
2359 }
2360 }
2361 store_reset(reset_point);
2362 }
2363 else
2364 {
2365 /* No valid prefixes found in trust_list file. */
2366 trusted_config = FALSE;
2367 }
2368 }
2369 }
2370 else
2371 {
2372 /* Could not open trust_list file. */
2373 trusted_config = FALSE;
2374 }
2375 }
2376 #else
2377 /* Not root; don't trust config */
2378 trusted_config = FALSE;
2379 #endif
2380 }
2381
2382 config_main_filelist = argrest;
2383 config_changed = TRUE;
2384 }
2385 break;
2386
2387
2388 /* -D: set up a macro definition */
2389
2390 case 'D':
2391 #ifdef DISABLE_D_OPTION
2392 fprintf(stderr, "exim: -D is not available in this Exim binary\n");
2393 exit(EXIT_FAILURE);
2394 #else
2395 {
2396 int ptr = 0;
2397 macro_item *mlast = NULL;
2398 macro_item *m;
2399 uschar name[24];
2400 uschar *s = argrest;
2401
2402 while (isspace(*s)) s++;
2403
2404 if (*s < 'A' || *s > 'Z')
2405 {
2406 fprintf(stderr, "exim: macro name set by -D must start with "
2407 "an upper case letter\n");
2408 exit(EXIT_FAILURE);
2409 }
2410
2411 while (isalnum(*s) || *s == '_')
2412 {
2413 if (ptr < sizeof(name)-1) name[ptr++] = *s;
2414 s++;
2415 }
2416 name[ptr] = 0;
2417 if (ptr == 0) { badarg = TRUE; break; }
2418 while (isspace(*s)) s++;
2419 if (*s != 0)
2420 {
2421 if (*s++ != '=') { badarg = TRUE; break; }
2422 while (isspace(*s)) s++;
2423 }
2424
2425 for (m = macros; m != NULL; m = m->next)
2426 {
2427 if (Ustrcmp(m->name, name) == 0)
2428 {
2429 fprintf(stderr, "exim: duplicated -D in command line\n");
2430 exit(EXIT_FAILURE);
2431 }
2432 mlast = m;
2433 }
2434
2435 m = store_get(sizeof(macro_item) + Ustrlen(name));
2436 m->next = NULL;
2437 m->command_line = TRUE;
2438 if (mlast == NULL) macros = m; else mlast->next = m;
2439 Ustrcpy(m->name, name);
2440 m->replacement = string_copy(s);
2441
2442 if (clmacro_count >= MAX_CLMACROS)
2443 {
2444 fprintf(stderr, "exim: too many -D options on command line\n");
2445 exit(EXIT_FAILURE);
2446 }
2447 clmacros[clmacro_count++] = string_sprintf("-D%s=%s", m->name,
2448 m->replacement);
2449 }
2450 #endif
2451 break;
2452
2453 /* -d: Set debug level (see also -v below) or set the drop_cr option.
2454 The latter is now a no-op, retained for compatibility only. If -dd is used,
2455 debugging subprocesses of the daemon is disabled. */
2456
2457 case 'd':
2458 if (Ustrcmp(argrest, "ropcr") == 0)
2459 {
2460 /* drop_cr = TRUE; */
2461 }
2462
2463 /* Use an intermediate variable so that we don't set debugging while
2464 decoding the debugging bits. */
2465
2466 else
2467 {
2468 unsigned int selector = D_default;
2469 debug_selector = 0;
2470 debug_file = NULL;
2471 if (*argrest == 'd')
2472 {
2473 debug_daemon = TRUE;
2474 argrest++;
2475 }
2476 if (*argrest != 0)
2477 decode_bits(&selector, 1, debug_notall, argrest,
2478 debug_options, debug_options_count, US"debug", 0);
2479 debug_selector = selector;
2480 }
2481 break;
2482
2483
2484 /* -E: This is a local error message. This option is not intended for
2485 external use at all, but is not restricted to trusted callers because it
2486 does no harm (just suppresses certain error messages) and if Exim is run
2487 not setuid root it won't always be trusted when it generates error
2488 messages using this option. If there is a message id following -E, point
2489 message_reference at it, for logging. */
2490
2491 case 'E':
2492 local_error_message = TRUE;
2493 if (mac_ismsgid(argrest)) message_reference = argrest;
2494 break;
2495
2496
2497 /* -ex: The vacation program calls sendmail with the undocumented "-eq"
2498 option, so it looks as if historically the -oex options are also callable
2499 without the leading -o. So we have to accept them. Before the switch,
2500 anything starting -oe has been converted to -e. Exim does not support all
2501 of the sendmail error options. */
2502
2503 case 'e':
2504 if (Ustrcmp(argrest, "e") == 0)
2505 {
2506 arg_error_handling = ERRORS_SENDER;
2507 errors_sender_rc = EXIT_SUCCESS;
2508 }
2509 else if (Ustrcmp(argrest, "m") == 0) arg_error_handling = ERRORS_SENDER;
2510 else if (Ustrcmp(argrest, "p") == 0) arg_error_handling = ERRORS_STDERR;
2511 else if (Ustrcmp(argrest, "q") == 0) arg_error_handling = ERRORS_STDERR;
2512 else if (Ustrcmp(argrest, "w") == 0) arg_error_handling = ERRORS_SENDER;
2513 else badarg = TRUE;
2514 break;
2515
2516
2517 /* -F: Set sender's full name, used instead of the gecos entry from
2518 the password file. Since users can usually alter their gecos entries,
2519 there's no security involved in using this instead. The data can follow
2520 the -F or be in the next argument. */
2521
2522 case 'F':
2523 if (*argrest == 0)
2524 {
2525 if(++i < argc) argrest = argv[i]; else
2526 { badarg = TRUE; break; }
2527 }
2528 originator_name = argrest;
2529 sender_name_forced = TRUE;
2530 break;
2531
2532
2533 /* -f: Set sender's address - this value is only actually used if Exim is
2534 run by a trusted user, or if untrusted_set_sender is set and matches the
2535 address, except that the null address can always be set by any user. The
2536 test for this happens later, when the value given here is ignored when not
2537 permitted. For an untrusted user, the actual sender is still put in Sender:
2538 if it doesn't match the From: header (unless no_local_from_check is set).
2539 The data can follow the -f or be in the next argument. The -r switch is an
2540 obsolete form of -f but since there appear to be programs out there that
2541 use anything that sendmail has ever supported, better accept it - the
2542 synonymizing is done before the switch above.
2543
2544 At this stage, we must allow domain literal addresses, because we don't
2545 know what the setting of allow_domain_literals is yet. Ditto for trailing
2546 dots and strip_trailing_dot. */
2547
2548 case 'f':
2549 {
2550 int dummy_start, dummy_end;
2551 uschar *errmess;
2552 if (*argrest == 0)
2553 {
2554 if (i+1 < argc) argrest = argv[++i]; else
2555 { badarg = TRUE; break; }
2556 }
2557 if (*argrest == 0)
2558 sender_address = string_sprintf(""); /* Ensure writeable memory */
2559 else
2560 {
2561 uschar *temp = argrest + Ustrlen(argrest) - 1;
2562 while (temp >= argrest && isspace(*temp)) temp--;
2563 if (temp >= argrest && *temp == '.') f_end_dot = TRUE;
2564 allow_domain_literals = TRUE;
2565 strip_trailing_dot = TRUE;
2566 #ifdef SUPPORT_I18N
2567 allow_utf8_domains = TRUE;
2568 #endif
2569 sender_address = parse_extract_address(argrest, &errmess,
2570 &dummy_start, &dummy_end, &sender_address_domain, TRUE);
2571 #ifdef SUPPORT_I18N
2572 message_smtputf8 = string_is_utf8(sender_address);
2573 allow_utf8_domains = FALSE;
2574 #endif
2575 allow_domain_literals = FALSE;
2576 strip_trailing_dot = FALSE;
2577 if (sender_address == NULL)
2578 {
2579 fprintf(stderr, "exim: bad -f address \"%s\": %s\n", argrest, errmess);
2580 return EXIT_FAILURE;
2581 }
2582 }
2583 sender_address_forced = TRUE;
2584 }
2585 break;
2586
2587 /* -G: sendmail invocation to specify that it's a gateway submission and
2588 sendmail may complain about problems instead of fixing them.
2589 We make it equivalent to an ACL "control = suppress_local_fixups" and do
2590 not at this time complain about problems. */
2591
2592 case 'G':
2593 flag_G = TRUE;
2594 break;
2595
2596 /* -h: Set the hop count for an incoming message. Exim does not currently
2597 support this; it always computes it by counting the Received: headers.
2598 To put it in will require a change to the spool header file format. */
2599
2600 case 'h':
2601 if (*argrest == 0)
2602 {
2603 if(++i < argc) argrest = argv[i]; else
2604 { badarg = TRUE; break; }
2605 }
2606 if (!isdigit(*argrest)) badarg = TRUE;
2607 break;
2608
2609
2610 /* -i: Set flag so dot doesn't end non-SMTP input (same as -oi, seems
2611 not to be documented for sendmail but mailx (at least) uses it) */
2612
2613 case 'i':
2614 if (*argrest == 0) dot_ends = FALSE; else badarg = TRUE;
2615 break;
2616
2617
2618 /* -L: set the identifier used for syslog; equivalent to setting
2619 syslog_processname in the config file, but needs to be an admin option. */
2620
2621 case 'L':
2622 if (*argrest == '\0')
2623 {
2624 if(++i < argc) argrest = argv[i]; else
2625 { badarg = TRUE; break; }
2626 }
2627 sz = Ustrlen(argrest);
2628 if (sz > 32)
2629 {
2630 fprintf(stderr, "exim: the -L syslog name is too long: \"%s\"\n", argrest);
2631 return EXIT_FAILURE;
2632 }
2633 if (sz < 1)
2634 {
2635 fprintf(stderr, "exim: the -L syslog name is too short\n");
2636 return EXIT_FAILURE;
2637 }
2638 cmdline_syslog_name = argrest;
2639 break;
2640
2641 case 'M':
2642 receiving_message = FALSE;
2643
2644 /* -MC: continue delivery of another message via an existing open
2645 file descriptor. This option is used for an internal call by the
2646 smtp transport when there is a pending message waiting to go to an
2647 address to which it has got a connection. Five subsequent arguments are
2648 required: transport name, host name, IP address, sequence number, and
2649 message_id. Transports may decline to create new processes if the sequence
2650 number gets too big. The channel is stdin. This (-MC) must be the last
2651 argument. There's a subsequent check that the real-uid is privileged.
2652
2653 If we are running in the test harness. delay for a bit, to let the process
2654 that set this one up complete. This makes for repeatability of the logging,
2655 etc. output. */
2656
2657 if (Ustrcmp(argrest, "C") == 0)
2658 {
2659 union sockaddr_46 interface_sock;
2660 EXIM_SOCKLEN_T size = sizeof(interface_sock);
2661
2662 if (argc != i + 6)
2663 {
2664 fprintf(stderr, "exim: too many or too few arguments after -MC\n");
2665 return EXIT_FAILURE;
2666 }
2667
2668 if (msg_action_arg >= 0)
2669 {
2670 fprintf(stderr, "exim: incompatible arguments\n");
2671 return EXIT_FAILURE;
2672 }
2673
2674 continue_transport = argv[++i];
2675 continue_hostname = argv[++i];
2676 continue_host_address = argv[++i];
2677 continue_sequence = Uatoi(argv[++i]);
2678 msg_action = MSG_DELIVER;
2679 msg_action_arg = ++i;
2680 forced_delivery = TRUE;
2681 queue_run_pid = passed_qr_pid;
2682 queue_run_pipe = passed_qr_pipe;
2683
2684 if (!mac_ismsgid(argv[i]))
2685 {
2686 fprintf(stderr, "exim: malformed message id %s after -MC option\n",
2687 argv[i]);
2688 return EXIT_FAILURE;
2689 }
2690
2691 /* Set up $sending_ip_address and $sending_port */
2692
2693 if (getsockname(fileno(stdin), (struct sockaddr *)(&interface_sock),
2694 &size) == 0)
2695 sending_ip_address = host_ntoa(-1, &interface_sock, NULL,
2696 &sending_port);
2697 else
2698 {
2699 fprintf(stderr, "exim: getsockname() failed after -MC option: %s\n",
2700 strerror(errno));
2701 return EXIT_FAILURE;
2702 }
2703
2704 if (running_in_test_harness) millisleep(500);
2705 break;
2706 }
2707
2708 /* -MCA: set the smtp_authenticated flag; this is useful only when it
2709 precedes -MC (see above). The flag indicates that the host to which
2710 Exim is connected has accepted an AUTH sequence. */
2711
2712 else if (Ustrcmp(argrest, "CA") == 0)
2713 {
2714 smtp_authenticated = TRUE;
2715 break;
2716 }
2717
2718 /* -MCD: set the smtp_use_dsn flag; this indicates that the host
2719 that exim is connected to supports the esmtp extension DSN */
2720 else if (Ustrcmp(argrest, "CD") == 0)
2721 {
2722 smtp_use_dsn = TRUE;
2723 break;
2724 }
2725
2726 /* -MCP: set the smtp_use_pipelining flag; this is useful only when
2727 it preceded -MC (see above) */
2728
2729 else if (Ustrcmp(argrest, "CP") == 0)
2730 {
2731 smtp_use_pipelining = TRUE;
2732 break;
2733 }
2734
2735 /* -MCQ: pass on the pid of the queue-running process that started
2736 this chain of deliveries and the fd of its synchronizing pipe; this
2737 is useful only when it precedes -MC (see above) */
2738
2739 else if (Ustrcmp(argrest, "CQ") == 0)
2740 {
2741 if(++i < argc) passed_qr_pid = (pid_t)(Uatol(argv[i]));
2742 else badarg = TRUE;
2743 if(++i < argc) passed_qr_pipe = (int)(Uatol(argv[i]));
2744 else badarg = TRUE;
2745 break;
2746 }
2747
2748 /* -MCS: set the smtp_use_size flag; this is useful only when it
2749 precedes -MC (see above) */
2750
2751 else if (Ustrcmp(argrest, "CS") == 0)
2752 {
2753 smtp_use_size = TRUE;
2754 break;
2755 }
2756
2757 /* -MCT: set the tls_offered flag; this is useful only when it
2758 precedes -MC (see above). The flag indicates that the host to which
2759 Exim is connected has offered TLS support. */
2760
2761 #ifdef SUPPORT_TLS
2762 else if (Ustrcmp(argrest, "CT") == 0)
2763 {
2764 tls_offered = TRUE;
2765 break;
2766 }
2767 #endif
2768
2769 /* -M[x]: various operations on the following list of message ids:
2770 -M deliver the messages, ignoring next retry times and thawing
2771 -Mc deliver the messages, checking next retry times, no thawing
2772 -Mf freeze the messages
2773 -Mg give up on the messages
2774 -Mt thaw the messages
2775 -Mrm remove the messages
2776 In the above cases, this must be the last option. There are also the
2777 following options which are followed by a single message id, and which
2778 act on that message. Some of them use the "recipient" addresses as well.
2779 -Mar add recipient(s)
2780 -Mmad mark all recipients delivered
2781 -Mmd mark recipients(s) delivered
2782 -Mes edit sender
2783 -Mset load a message for use with -be
2784 -Mvb show body
2785 -Mvc show copy (of whole message, in RFC 2822 format)
2786 -Mvh show header
2787 -Mvl show log
2788 */
2789
2790 else if (*argrest == 0)
2791 {
2792 msg_action = MSG_DELIVER;
2793 forced_delivery = deliver_force_thaw = TRUE;
2794 }
2795 else if (Ustrcmp(argrest, "ar") == 0)
2796 {
2797 msg_action = MSG_ADD_RECIPIENT;
2798 one_msg_action = TRUE;
2799 }
2800 else if (Ustrcmp(argrest, "c") == 0) msg_action = MSG_DELIVER;
2801 else if (Ustrcmp(argrest, "es") == 0)
2802 {
2803 msg_action = MSG_EDIT_SENDER;
2804 one_msg_action = TRUE;
2805 }
2806 else if (Ustrcmp(argrest, "f") == 0) msg_action = MSG_FREEZE;
2807 else if (Ustrcmp(argrest, "g") == 0)
2808 {
2809 msg_action = MSG_DELIVER;
2810 deliver_give_up = TRUE;
2811 }
2812 else if (Ustrcmp(argrest, "mad") == 0)
2813 {
2814 msg_action = MSG_MARK_ALL_DELIVERED;
2815 }
2816 else if (Ustrcmp(argrest, "md") == 0)
2817 {
2818 msg_action = MSG_MARK_DELIVERED;
2819 one_msg_action = TRUE;
2820 }
2821 else if (Ustrcmp(argrest, "rm") == 0) msg_action = MSG_REMOVE;
2822 else if (Ustrcmp(argrest, "set") == 0)
2823 {
2824 msg_action = MSG_LOAD;
2825 one_msg_action = TRUE;
2826 }
2827 else if (Ustrcmp(argrest, "t") == 0) msg_action = MSG_THAW;
2828 else if (Ustrcmp(argrest, "vb") == 0)
2829 {
2830 msg_action = MSG_SHOW_BODY;
2831 one_msg_action = TRUE;
2832 }
2833 else if (Ustrcmp(argrest, "vc") == 0)
2834 {
2835 msg_action = MSG_SHOW_COPY;
2836 one_msg_action = TRUE;
2837 }
2838 else if (Ustrcmp(argrest, "vh") == 0)
2839 {
2840 msg_action = MSG_SHOW_HEADER;
2841 one_msg_action = TRUE;
2842 }
2843 else if (Ustrcmp(argrest, "vl") == 0)
2844 {
2845 msg_action = MSG_SHOW_LOG;
2846 one_msg_action = TRUE;
2847 }
2848 else { badarg = TRUE; break; }
2849
2850 /* All the -Mxx options require at least one message id. */
2851
2852 msg_action_arg = i + 1;
2853 if (msg_action_arg >= argc)
2854 {
2855 fprintf(stderr, "exim: no message ids given after %s option\n", arg);
2856 return EXIT_FAILURE;
2857 }
2858
2859 /* Some require only message ids to follow */
2860
2861 if (!one_msg_action)
2862 {
2863 int j;
2864 for (j = msg_action_arg; j < argc; j++) if (!mac_ismsgid(argv[j]))
2865 {
2866 fprintf(stderr, "exim: malformed message id %s after %s option\n",
2867 argv[j], arg);
2868 return EXIT_FAILURE;
2869 }
2870 goto END_ARG; /* Remaining args are ids */
2871 }
2872
2873 /* Others require only one message id, possibly followed by addresses,
2874 which will be handled as normal arguments. */
2875
2876 else
2877 {
2878 if (!mac_ismsgid(argv[msg_action_arg]))
2879 {
2880 fprintf(stderr, "exim: malformed message id %s after %s option\n",
2881 argv[msg_action_arg], arg);
2882 return EXIT_FAILURE;
2883 }
2884 i++;
2885 }
2886 break;
2887
2888
2889 /* Some programs seem to call the -om option without the leading o;
2890 for sendmail it askes for "me too". Exim always does this. */
2891
2892 case 'm':
2893 if (*argrest != 0) badarg = TRUE;
2894 break;
2895
2896
2897 /* -N: don't do delivery - a debugging option that stops transports doing
2898 their thing. It implies debugging at the D_v level. */
2899
2900 case 'N':
2901 if (*argrest == 0)
2902 {
2903 dont_deliver = TRUE;
2904 debug_selector |= D_v;
2905 debug_file = stderr;
2906 }
2907 else badarg = TRUE;
2908 break;
2909
2910
2911 /* -n: This means "don't alias" in sendmail, apparently.
2912 For normal invocations, it has no effect.
2913 It may affect some other options. */
2914
2915 case 'n':
2916 flag_n = TRUE;
2917 break;
2918
2919 /* -O: Just ignore it. In sendmail, apparently -O option=value means set
2920 option to the specified value. This form uses long names. We need to handle
2921 -O option=value and -Ooption=value. */
2922
2923 case 'O':
2924 if (*argrest == 0)
2925 {
2926 if (++i >= argc)
2927 {
2928 fprintf(stderr, "exim: string expected after -O\n");
2929 exit(EXIT_FAILURE);
2930 }
2931 }
2932 break;
2933
2934 case 'o':
2935
2936 /* -oA: Set an argument for the bi command (sendmail's "alternate alias
2937 file" option). */
2938
2939 if (*argrest == 'A')
2940 {
2941 alias_arg = argrest + 1;
2942 if (alias_arg[0] == 0)
2943 {
2944 if (i+1 < argc) alias_arg = argv[++i]; else
2945 {
2946 fprintf(stderr, "exim: string expected after -oA\n");
2947 exit(EXIT_FAILURE);
2948 }
2949 }
2950 }
2951
2952 /* -oB: Set a connection message max value for remote deliveries */
2953
2954 else if (*argrest == 'B')
2955 {
2956 uschar *p = argrest + 1;
2957 if (p[0] == 0)
2958 {
2959 if (i+1 < argc && isdigit((argv[i+1][0]))) p = argv[++i]; else
2960 {
2961 connection_max_messages = 1;
2962 p = NULL;
2963 }
2964 }
2965
2966 if (p != NULL)
2967 {
2968 if (!isdigit(*p))
2969 {
2970 fprintf(stderr, "exim: number expected after -oB\n");
2971 exit(EXIT_FAILURE);
2972 }
2973 connection_max_messages = Uatoi(p);
2974 }
2975 }
2976
2977 /* -odb: background delivery */
2978
2979 else if (Ustrcmp(argrest, "db") == 0)
2980 {
2981 synchronous_delivery = FALSE;
2982 arg_queue_only = FALSE;
2983 queue_only_set = TRUE;
2984 }
2985
2986 /* -odf: foreground delivery (smail-compatible option); same effect as
2987 -odi: interactive (synchronous) delivery (sendmail-compatible option)
2988 */
2989
2990 else if (Ustrcmp(argrest, "df") == 0 || Ustrcmp(argrest, "di") == 0)
2991 {
2992 synchronous_delivery = TRUE;
2993 arg_queue_only = FALSE;
2994 queue_only_set = TRUE;
2995 }
2996
2997 /* -odq: queue only */
2998
2999 else if (Ustrcmp(argrest, "dq") == 0)
3000 {
3001 synchronous_delivery = FALSE;
3002 arg_queue_only = TRUE;
3003 queue_only_set = TRUE;
3004 }
3005
3006 /* -odqs: queue SMTP only - do local deliveries and remote routing,
3007 but no remote delivery */
3008
3009 else if (Ustrcmp(argrest, "dqs") == 0)
3010 {
3011 queue_smtp = TRUE;
3012 arg_queue_only = FALSE;
3013 queue_only_set = TRUE;
3014 }
3015
3016 /* -oex: Sendmail error flags. As these are also accepted without the
3017 leading -o prefix, for compatibility with vacation and other callers,
3018 they are handled with -e above. */
3019
3020 /* -oi: Set flag so dot doesn't end non-SMTP input (same as -i)
3021 -oitrue: Another sendmail syntax for the same */
3022
3023 else if (Ustrcmp(argrest, "i") == 0 ||
3024 Ustrcmp(argrest, "itrue") == 0)
3025 dot_ends = FALSE;
3026
3027 /* -oM*: Set various characteristics for an incoming message; actually
3028 acted on for trusted callers only. */
3029
3030 else if (*argrest == 'M')
3031 {
3032 if (i+1 >= argc)
3033 {
3034 fprintf(stderr, "exim: data expected after -o%s\n", argrest);
3035 exit(EXIT_FAILURE);
3036 }
3037
3038 /* -oMa: Set sender host address */
3039
3040 if (Ustrcmp(argrest, "Ma") == 0) sender_host_address = argv[++i];
3041
3042 /* -oMaa: Set authenticator name */
3043
3044 else if (Ustrcmp(argrest, "Maa") == 0)
3045 sender_host_authenticated = argv[++i];
3046
3047 /* -oMas: setting authenticated sender */
3048
3049 else if (Ustrcmp(argrest, "Mas") == 0) authenticated_sender = argv[++i];
3050
3051 /* -oMai: setting authenticated id */
3052
3053 else if (Ustrcmp(argrest, "Mai") == 0) authenticated_id = argv[++i];
3054
3055 /* -oMi: Set incoming interface address */
3056
3057 else if (Ustrcmp(argrest, "Mi") == 0) interface_address = argv[++i];
3058
3059 /* -oMm: Message reference */
3060
3061 else if (Ustrcmp(argrest, "Mm") == 0)
3062 {
3063 if (!mac_ismsgid(argv[i+1]))
3064 {
3065 fprintf(stderr,"-oMm must be a valid message ID\n");
3066 exit(EXIT_FAILURE);
3067 }
3068 if (!trusted_config)
3069 {
3070 fprintf(stderr,"-oMm must be called by a trusted user/config\n");
3071 exit(EXIT_FAILURE);
3072 }
3073 message_reference = argv[++i];
3074 }
3075
3076 /* -oMr: Received protocol */
3077
3078 else if (Ustrcmp(argrest, "Mr") == 0) received_protocol = argv[++i];
3079
3080 /* -oMs: Set sender host name */
3081
3082 else if (Ustrcmp(argrest, "Ms") == 0) sender_host_name = argv[++i];
3083
3084 /* -oMt: Set sender ident */
3085
3086 else if (Ustrcmp(argrest, "Mt") == 0)
3087 {
3088 sender_ident_set = TRUE;
3089 sender_ident = argv[++i];
3090 }
3091
3092 /* Else a bad argument */
3093
3094 else
3095 {
3096 badarg = TRUE;
3097 break;
3098 }
3099 }
3100
3101 /* -om: Me-too flag for aliases. Exim always does this. Some programs
3102 seem to call this as -m (undocumented), so that is also accepted (see
3103 above). */
3104
3105 else if (Ustrcmp(argrest, "m") == 0) {}
3106
3107 /* -oo: An ancient flag for old-style addresses which still seems to
3108 crop up in some calls (see in SCO). */
3109
3110 else if (Ustrcmp(argrest, "o") == 0) {}
3111
3112 /* -oP <name>: set pid file path for daemon */
3113
3114 else if (Ustrcmp(argrest, "P") == 0)
3115 override_pid_file_path = argv[++i];
3116
3117 /* -or <n>: set timeout for non-SMTP acceptance
3118 -os <n>: set timeout for SMTP acceptance */
3119
3120 else if (*argrest == 'r' || *argrest == 's')
3121 {
3122 int *tp = (*argrest == 'r')?
3123 &arg_receive_timeout : &arg_smtp_receive_timeout;
3124 if (argrest[1] == 0)
3125 {
3126 if (i+1 < argc) *tp= readconf_readtime(argv[++i], 0, FALSE);
3127 }
3128 else *tp = readconf_readtime(argrest + 1, 0, FALSE);
3129 if (*tp < 0)
3130 {
3131 fprintf(stderr, "exim: bad time value %s: abandoned\n", argv[i]);
3132 exit(EXIT_FAILURE);
3133 }
3134 }
3135
3136 /* -oX <list>: Override local_interfaces and/or default daemon ports */
3137
3138 else if (Ustrcmp(argrest, "X") == 0)
3139 override_local_interfaces = argv[++i];
3140
3141 /* Unknown -o argument */
3142
3143 else badarg = TRUE;
3144 break;
3145
3146
3147 /* -ps: force Perl startup; -pd force delayed Perl startup */
3148
3149 case 'p':
3150 #ifdef EXIM_PERL
3151 if (*argrest == 's' && argrest[1] == 0)
3152 {
3153 perl_start_option = 1;
3154 break;
3155 }
3156 if (*argrest == 'd' && argrest[1] == 0)
3157 {
3158 perl_start_option = -1;
3159 break;
3160 }
3161 #endif
3162
3163 /* -panythingelse is taken as the Sendmail-compatible argument -prval:sval,
3164 which sets the host protocol and host name */
3165
3166 if (*argrest == 0)
3167 {
3168 if (i+1 < argc) argrest = argv[++i]; else
3169 { badarg = TRUE; break; }
3170 }
3171
3172 if (*argrest != 0)
3173 {
3174 uschar *hn = Ustrchr(argrest, ':');
3175 if (hn == NULL)
3176 {
3177 received_protocol = argrest;
3178 }
3179 else
3180 {
3181 received_protocol = string_copyn(argrest, hn - argrest);
3182 sender_host_name = hn + 1;
3183 }
3184 }
3185 break;
3186
3187
3188 case 'q':
3189 receiving_message = FALSE;
3190 if (queue_interval >= 0)
3191 {
3192 fprintf(stderr, "exim: -q specified more than once\n");
3193 exit(EXIT_FAILURE);
3194 }
3195
3196 /* -qq...: Do queue runs in a 2-stage manner */
3197
3198 if (*argrest == 'q')
3199 {
3200 queue_2stage = TRUE;
3201 argrest++;
3202 }
3203
3204 /* -qi...: Do only first (initial) deliveries */
3205
3206 if (*argrest == 'i')
3207 {
3208 queue_run_first_delivery = TRUE;
3209 argrest++;
3210 }
3211
3212 /* -qf...: Run the queue, forcing deliveries
3213 -qff..: Ditto, forcing thawing as well */
3214
3215 if (*argrest == 'f')
3216 {
3217 queue_run_force = TRUE;
3218 if (*(++argrest) == 'f')
3219 {
3220 deliver_force_thaw = TRUE;
3221 argrest++;
3222 }
3223 }
3224
3225 /* -q[f][f]l...: Run the queue only on local deliveries */
3226
3227 if (*argrest == 'l')
3228 {
3229 queue_run_local = TRUE;
3230 argrest++;
3231 }
3232
3233 /* -q[f][f][l]: Run the queue, optionally forced, optionally local only,
3234 optionally starting from a given message id. */
3235
3236 if (*argrest == 0 &&
3237 (i + 1 >= argc || argv[i+1][0] == '-' || mac_ismsgid(argv[i+1])))
3238 {
3239 queue_interval = 0;
3240 if (i+1 < argc && mac_ismsgid(argv[i+1]))
3241 start_queue_run_id = argv[++i];
3242 if (i+1 < argc && mac_ismsgid(argv[i+1]))
3243 stop_queue_run_id = argv[++i];
3244 }
3245
3246 /* -q[f][f][l]<n>: Run the queue at regular intervals, optionally forced,
3247 optionally local only. */
3248
3249 else
3250 {
3251 if (*argrest != 0)
3252 queue_interval = readconf_readtime(argrest, 0, FALSE);
3253 else
3254 queue_interval = readconf_readtime(argv[++i], 0, FALSE);
3255 if (queue_interval <= 0)
3256 {
3257 fprintf(stderr, "exim: bad time value %s: abandoned\n", argv[i]);
3258 exit(EXIT_FAILURE);
3259 }
3260 }
3261 break;
3262
3263
3264 case 'R': /* Synonymous with -qR... */
3265 receiving_message = FALSE;
3266
3267 /* -Rf: As -R (below) but force all deliveries,
3268 -Rff: Ditto, but also thaw all frozen messages,
3269 -Rr: String is regex
3270 -Rrf: Regex and force
3271 -Rrff: Regex and force and thaw
3272
3273 in all cases provided there are no further characters in this
3274 argument. */
3275
3276 if (*argrest != 0)
3277 {
3278 int i;
3279 for (i = 0; i < sizeof(rsopts)/sizeof(uschar *); i++)
3280 {
3281 if (Ustrcmp(argrest, rsopts[i]) == 0)
3282 {
3283 if (i != 2) queue_run_force = TRUE;
3284 if (i >= 2) deliver_selectstring_regex = TRUE;
3285 if (i == 1 || i == 4) deliver_force_thaw = TRUE;
3286 argrest += Ustrlen(rsopts[i]);
3287 }
3288 }
3289 }
3290
3291 /* -R: Set string to match in addresses for forced queue run to
3292 pick out particular messages. */
3293
3294 if (*argrest == 0)
3295 {
3296 if (i+1 < argc) deliver_selectstring = argv[++i]; else
3297 {
3298 fprintf(stderr, "exim: string expected after -R\n");
3299 exit(EXIT_FAILURE);
3300 }
3301 }
3302 else deliver_selectstring = argrest;
3303 break;
3304
3305
3306 /* -r: an obsolete synonym for -f (see above) */
3307
3308
3309 /* -S: Like -R but works on sender. */
3310
3311 case 'S': /* Synonymous with -qS... */
3312 receiving_message = FALSE;
3313
3314 /* -Sf: As -S (below) but force all deliveries,
3315 -Sff: Ditto, but also thaw all frozen messages,
3316 -Sr: String is regex
3317 -Srf: Regex and force
3318 -Srff: Regex and force and thaw
3319
3320 in all cases provided there are no further characters in this
3321 argument. */
3322
3323 if (*argrest != 0)
3324 {
3325 int i;
3326 for (i = 0; i < sizeof(rsopts)/sizeof(uschar *); i++)
3327 {
3328 if (Ustrcmp(argrest, rsopts[i]) == 0)
3329 {
3330 if (i != 2) queue_run_force = TRUE;
3331 if (i >= 2) deliver_selectstring_sender_regex = TRUE;
3332 if (i == 1 || i == 4) deliver_force_thaw = TRUE;
3333 argrest += Ustrlen(rsopts[i]);
3334 }
3335 }
3336 }
3337
3338 /* -S: Set string to match in addresses for forced queue run to
3339 pick out particular messages. */
3340
3341 if (*argrest == 0)
3342 {
3343 if (i+1 < argc) deliver_selectstring_sender = argv[++i]; else
3344 {
3345 fprintf(stderr, "exim: string expected after -S\n");
3346 exit(EXIT_FAILURE);
3347 }
3348 }
3349 else deliver_selectstring_sender = argrest;
3350 break;
3351
3352 /* -Tqt is an option that is exclusively for use by the testing suite.
3353 It is not recognized in other circumstances. It allows for the setting up
3354 of explicit "queue times" so that various warning/retry things can be
3355 tested. Otherwise variability of clock ticks etc. cause problems. */
3356
3357 case 'T':
3358 if (running_in_test_harness && Ustrcmp(argrest, "qt") == 0)
3359 fudged_queue_times = argv[++i];
3360 else badarg = TRUE;
3361 break;
3362
3363
3364 /* -t: Set flag to extract recipients from body of message. */
3365
3366 case 't':
3367 if (*argrest == 0) extract_recipients = TRUE;
3368
3369 /* -ti: Set flag to extract recipients from body of message, and also
3370 specify that dot does not end the message. */
3371
3372 else if (Ustrcmp(argrest, "i") == 0)
3373 {
3374 extract_recipients = TRUE;
3375 dot_ends = FALSE;
3376 }
3377
3378 /* -tls-on-connect: don't wait for STARTTLS (for old clients) */
3379
3380 #ifdef SUPPORT_TLS
3381 else if (Ustrcmp(argrest, "ls-on-connect") == 0) tls_in.on_connect = TRUE;
3382 #endif
3383
3384 else badarg = TRUE;
3385 break;
3386
3387
3388 /* -U: This means "initial user submission" in sendmail, apparently. The
3389 doc claims that in future sendmail may refuse syntactically invalid
3390 messages instead of fixing them. For the moment, we just ignore it. */
3391
3392 case 'U':
3393 break;
3394
3395
3396 /* -v: verify things - this is a very low-level debugging */
3397
3398 case 'v':
3399 if (*argrest == 0)
3400 {
3401 debug_selector |= D_v;
3402 debug_file = stderr;
3403 }
3404 else badarg = TRUE;
3405 break;
3406
3407
3408 /* -x: AIX uses this to indicate some fancy 8-bit character stuff:
3409
3410 The -x flag tells the sendmail command that mail from a local
3411 mail program has National Language Support (NLS) extended characters
3412 in the body of the mail item. The sendmail command can send mail with
3413 extended NLS characters across networks that normally corrupts these
3414 8-bit characters.
3415
3416 As Exim is 8-bit clean, it just ignores this flag. */
3417
3418 case 'x':
3419 if (*argrest != 0) badarg = TRUE;
3420 break;
3421
3422 /* -X: in sendmail: takes one parameter, logfile, and sends debugging
3423 logs to that file. We swallow the parameter and otherwise ignore it. */
3424
3425 case 'X':
3426 if (*argrest == '\0')
3427 if (++i >= argc)
3428 {
3429 fprintf(stderr, "exim: string expected after -X\n");
3430 exit(EXIT_FAILURE);
3431 }
3432 break;
3433
3434 case 'z':
3435 if (*argrest == '\0')
3436 if (++i < argc) log_oneline = argv[i]; else
3437 {
3438 fprintf(stderr, "exim: file name expected after %s\n", argv[i-1]);
3439 exit(EXIT_FAILURE);
3440 }
3441 break;
3442
3443 /* All other initial characters are errors */
3444
3445 default:
3446 badarg = TRUE;
3447 break;
3448 } /* End of high-level switch statement */
3449
3450 /* Failed to recognize the option, or syntax error */
3451
3452 if (badarg)
3453 {
3454 fprintf(stderr, "exim abandoned: unknown, malformed, or incomplete "
3455 "option %s\n", arg);
3456 exit(EXIT_FAILURE);
3457 }
3458 }
3459
3460
3461 /* If -R or -S have been specified without -q, assume a single queue run. */
3462
3463 if ((deliver_selectstring != NULL || deliver_selectstring_sender != NULL) &&
3464 queue_interval < 0) queue_interval = 0;
3465
3466
3467 END_ARG:
3468 /* If usage_wanted is set we call the usage function - which never returns */
3469 if (usage_wanted) exim_usage(called_as);
3470
3471 /* Arguments have been processed. Check for incompatibilities. */
3472 if ((
3473 (smtp_input || extract_recipients || recipients_arg < argc) &&
3474 (daemon_listen || queue_interval >= 0 || bi_option ||
3475 test_retry_arg >= 0 || test_rewrite_arg >= 0 ||
3476 filter_test != FTEST_NONE || (msg_action_arg > 0 && !one_msg_action))
3477 ) ||
3478 (
3479 msg_action_arg > 0 &&
3480 (daemon_listen || queue_interval >= 0 || list_options ||
3481 (checking && msg_action != MSG_LOAD) ||
3482 bi_option || test_retry_arg >= 0 || test_rewrite_arg >= 0)
3483 ) ||
3484 (
3485 (daemon_listen || queue_interval >= 0) &&
3486 (sender_address != NULL || list_options || list_queue || checking ||
3487 bi_option)
3488 ) ||
3489 (
3490 daemon_listen && queue_interval == 0
3491 ) ||
3492 (
3493 inetd_wait_mode && queue_interval >= 0
3494 ) ||
3495 (
3496 list_options &&
3497 (checking || smtp_input || extract_recipients ||
3498 filter_test != FTEST_NONE || bi_option)
3499 ) ||
3500 (
3501 verify_address_mode &&
3502 (address_test_mode || smtp_input || extract_recipients ||
3503 filter_test != FTEST_NONE || bi_option)
3504 ) ||
3505 (
3506 address_test_mode && (smtp_input || extract_recipients ||
3507 filter_test != FTEST_NONE || bi_option)
3508 ) ||
3509 (
3510 smtp_input && (sender_address != NULL || filter_test != FTEST_NONE ||
3511 extract_recipients)
3512 ) ||
3513 (
3514 deliver_selectstring != NULL && queue_interval < 0
3515 ) ||
3516 (
3517 msg_action == MSG_LOAD &&
3518 (!expansion_test || expansion_test_message != NULL)
3519 )
3520 )
3521 {
3522 fprintf(stderr, "exim: incompatible command-line options or arguments\n");
3523 exit(EXIT_FAILURE);
3524 }
3525
3526 /* If debugging is set up, set the file and the file descriptor to pass on to
3527 child processes. It should, of course, be 2 for stderr. Also, force the daemon
3528 to run in the foreground. */
3529
3530 if (debug_selector != 0)
3531 {
3532 debug_file = stderr;
3533 debug_fd = fileno(debug_file);
3534 background_daemon = FALSE;
3535 if (running_in_test_harness) millisleep(100); /* lets caller finish */
3536 if (debug_selector != D_v) /* -v only doesn't show this */
3537 {
3538 debug_printf("Exim version %s uid=%ld gid=%ld pid=%d D=%x\n",
3539 version_string, (long int)real_uid, (long int)real_gid, (int)getpid(),
3540 debug_selector);
3541 if (!version_printed)
3542 show_whats_supported(stderr);
3543 }
3544 }
3545