Fix Solaris build
[exim.git] / src / src / exim.c
1 /*************************************************
2 * Exim - an Internet mail transport agent *
3 *************************************************/
4
5 /* Copyright (c) University of Cambridge 1995 - 2016 */
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 #ifndef DISABLE_DKIM
818 fprintf(f, " DKIM");
819 #endif
820 #ifndef DISABLE_DNSSEC
821 fprintf(f, " DNSSEC");
822 #endif
823 #ifndef DISABLE_EVENT
824 fprintf(f, " Event");
825 #endif
826 #ifdef SUPPORT_I18N
827 fprintf(f, " I18N");
828 #endif
829 #ifndef DISABLE_OCSP
830 fprintf(f, " OCSP");
831 #endif
832 #ifndef DISABLE_PRDR
833 fprintf(f, " PRDR");
834 #endif
835 #ifdef SUPPORT_PROXY
836 fprintf(f, " PROXY");
837 #endif
838 #ifdef SUPPORT_SOCKS
839 fprintf(f, " SOCKS");
840 #endif
841 #ifdef EXPERIMENTAL_SPF
842 fprintf(f, " Experimental_SPF");
843 #endif
844 #ifdef EXPERIMENTAL_SRS
845 fprintf(f, " Experimental_SRS");
846 #endif
847 #ifdef EXPERIMENTAL_BRIGHTMAIL
848 fprintf(f, " Experimental_Brightmail");
849 #endif
850 #ifdef EXPERIMENTAL_DANE
851 fprintf(f, " Experimental_DANE");
852 #endif
853 #ifdef EXPERIMENTAL_DCC
854 fprintf(f, " Experimental_DCC");
855 #endif
856 #ifdef EXPERIMENTAL_DMARC
857 fprintf(f, " Experimental_DMARC");
858 #endif
859 #ifdef EXPERIMENTAL_DSN_INFO
860 fprintf(f, " Experimental_DSN_info");
861 #endif
862 fprintf(f, "\n");
863
864 fprintf(f, "Lookups (built-in):");
865 #if defined(LOOKUP_LSEARCH) && LOOKUP_LSEARCH!=2
866 fprintf(f, " lsearch wildlsearch nwildlsearch iplsearch");
867 #endif
868 #if defined(LOOKUP_CDB) && LOOKUP_CDB!=2
869 fprintf(f, " cdb");
870 #endif
871 #if defined(LOOKUP_DBM) && LOOKUP_DBM!=2
872 fprintf(f, " dbm dbmjz dbmnz");
873 #endif
874 #if defined(LOOKUP_DNSDB) && LOOKUP_DNSDB!=2
875 fprintf(f, " dnsdb");
876 #endif
877 #if defined(LOOKUP_DSEARCH) && LOOKUP_DSEARCH!=2
878 fprintf(f, " dsearch");
879 #endif
880 #if defined(LOOKUP_IBASE) && LOOKUP_IBASE!=2
881 fprintf(f, " ibase");
882 #endif
883 #if defined(LOOKUP_LDAP) && LOOKUP_LDAP!=2
884 fprintf(f, " ldap ldapdn ldapm");
885 #endif
886 #if defined(LOOKUP_MYSQL) && LOOKUP_MYSQL!=2
887 fprintf(f, " mysql");
888 #endif
889 #if defined(LOOKUP_NIS) && LOOKUP_NIS!=2
890 fprintf(f, " nis nis0");
891 #endif
892 #if defined(LOOKUP_NISPLUS) && LOOKUP_NISPLUS!=2
893 fprintf(f, " nisplus");
894 #endif
895 #if defined(LOOKUP_ORACLE) && LOOKUP_ORACLE!=2
896 fprintf(f, " oracle");
897 #endif
898 #if defined(LOOKUP_PASSWD) && LOOKUP_PASSWD!=2
899 fprintf(f, " passwd");
900 #endif
901 #if defined(LOOKUP_PGSQL) && LOOKUP_PGSQL!=2
902 fprintf(f, " pgsql");
903 #endif
904 #if defined(LOOKUP_REDIS) && LOOKUP_REDIS!=2
905 fprintf(f, " redis");
906 #endif
907 #if defined(LOOKUP_SQLITE) && LOOKUP_SQLITE!=2
908 fprintf(f, " sqlite");
909 #endif
910 #if defined(LOOKUP_TESTDB) && LOOKUP_TESTDB!=2
911 fprintf(f, " testdb");
912 #endif
913 #if defined(LOOKUP_WHOSON) && LOOKUP_WHOSON!=2
914 fprintf(f, " whoson");
915 #endif
916 fprintf(f, "\n");
917
918 fprintf(f, "Authenticators:");
919 #ifdef AUTH_CRAM_MD5
920 fprintf(f, " cram_md5");
921 #endif
922 #ifdef AUTH_CYRUS_SASL
923 fprintf(f, " cyrus_sasl");
924 #endif
925 #ifdef AUTH_DOVECOT
926 fprintf(f, " dovecot");
927 #endif
928 #ifdef AUTH_GSASL
929 fprintf(f, " gsasl");
930 #endif
931 #ifdef AUTH_HEIMDAL_GSSAPI
932 fprintf(f, " heimdal_gssapi");
933 #endif
934 #ifdef AUTH_PLAINTEXT
935 fprintf(f, " plaintext");
936 #endif
937 #ifdef AUTH_SPA
938 fprintf(f, " spa");
939 #endif
940 #ifdef AUTH_TLS
941 fprintf(f, " tls");
942 #endif
943 fprintf(f, "\n");
944
945 fprintf(f, "Routers:");
946 #ifdef ROUTER_ACCEPT
947 fprintf(f, " accept");
948 #endif
949 #ifdef ROUTER_DNSLOOKUP
950 fprintf(f, " dnslookup");
951 #endif
952 #ifdef ROUTER_IPLITERAL
953 fprintf(f, " ipliteral");
954 #endif
955 #ifdef ROUTER_IPLOOKUP
956 fprintf(f, " iplookup");
957 #endif
958 #ifdef ROUTER_MANUALROUTE
959 fprintf(f, " manualroute");
960 #endif
961 #ifdef ROUTER_QUERYPROGRAM
962 fprintf(f, " queryprogram");
963 #endif
964 #ifdef ROUTER_REDIRECT
965 fprintf(f, " redirect");
966 #endif
967 fprintf(f, "\n");
968
969 fprintf(f, "Transports:");
970 #ifdef TRANSPORT_APPENDFILE
971 fprintf(f, " appendfile");
972 #ifdef SUPPORT_MAILDIR
973 fprintf(f, "/maildir");
974 #endif
975 #ifdef SUPPORT_MAILSTORE
976 fprintf(f, "/mailstore");
977 #endif
978 #ifdef SUPPORT_MBX
979 fprintf(f, "/mbx");
980 #endif
981 #endif
982 #ifdef TRANSPORT_AUTOREPLY
983 fprintf(f, " autoreply");
984 #endif
985 #ifdef TRANSPORT_LMTP
986 fprintf(f, " lmtp");
987 #endif
988 #ifdef TRANSPORT_PIPE
989 fprintf(f, " pipe");
990 #endif
991 #ifdef TRANSPORT_SMTP
992 fprintf(f, " smtp");
993 #endif
994 fprintf(f, "\n");
995
996 if (fixed_never_users[0] > 0)
997 {
998 int i;
999 fprintf(f, "Fixed never_users: ");
1000 for (i = 1; i <= (int)fixed_never_users[0] - 1; i++)
1001 fprintf(f, "%d:", (unsigned int)fixed_never_users[i]);
1002 fprintf(f, "%d\n", (unsigned int)fixed_never_users[i]);
1003 }
1004
1005 fprintf(f, "Size of off_t: " SIZE_T_FMT "\n", sizeof(off_t));
1006
1007 /* Everything else is details which are only worth reporting when debugging.
1008 Perhaps the tls_version_report should move into this too. */
1009 DEBUG(D_any) do {
1010
1011 int i;
1012
1013 /* clang defines __GNUC__ (at least, for me) so test for it first */
1014 #if defined(__clang__)
1015 fprintf(f, "Compiler: CLang [%s]\n", __clang_version__);
1016 #elif defined(__GNUC__)
1017 fprintf(f, "Compiler: GCC [%s]\n",
1018 # ifdef __VERSION__
1019 __VERSION__
1020 # else
1021 "? unknown version ?"
1022 # endif
1023 );
1024 #else
1025 fprintf(f, "Compiler: <unknown>\n");
1026 #endif
1027
1028 #ifdef SUPPORT_TLS
1029 tls_version_report(f);
1030 #endif
1031 #ifdef SUPPORT_I18N
1032 utf8_version_report(f);
1033 #endif
1034
1035 for (authi = auths_available; *authi->driver_name != '\0'; ++authi)
1036 if (authi->version_report)
1037 (*authi->version_report)(f);
1038
1039 /* PCRE_PRERELEASE is either defined and empty or a bare sequence of
1040 characters; unless it's an ancient version of PCRE in which case it
1041 is not defined. */
1042 #ifndef PCRE_PRERELEASE
1043 #define PCRE_PRERELEASE
1044 #endif
1045 #define QUOTE(X) #X
1046 #define EXPAND_AND_QUOTE(X) QUOTE(X)
1047 fprintf(f, "Library version: PCRE: Compile: %d.%d%s\n"
1048 " Runtime: %s\n",
1049 PCRE_MAJOR, PCRE_MINOR,
1050 EXPAND_AND_QUOTE(PCRE_PRERELEASE) "",
1051 pcre_version());
1052 #undef QUOTE
1053 #undef EXPAND_AND_QUOTE
1054
1055 init_lookup_list();
1056 for (i = 0; i < lookup_list_count; i++)
1057 if (lookup_list[i]->version_report)
1058 lookup_list[i]->version_report(f);
1059
1060 #ifdef WHITELIST_D_MACROS
1061 fprintf(f, "WHITELIST_D_MACROS: \"%s\"\n", WHITELIST_D_MACROS);
1062 #else
1063 fprintf(f, "WHITELIST_D_MACROS unset\n");
1064 #endif
1065 #ifdef TRUSTED_CONFIG_LIST
1066 fprintf(f, "TRUSTED_CONFIG_LIST: \"%s\"\n", TRUSTED_CONFIG_LIST);
1067 #else
1068 fprintf(f, "TRUSTED_CONFIG_LIST unset\n");
1069 #endif
1070
1071 } while (0);
1072 }
1073
1074
1075 /*************************************************
1076 * Show auxiliary information about Exim *
1077 *************************************************/
1078
1079 static void
1080 show_exim_information(enum commandline_info request, FILE *stream)
1081 {
1082 const uschar **pp;
1083
1084 switch(request)
1085 {
1086 case CMDINFO_NONE:
1087 fprintf(stream, "Oops, something went wrong.\n");
1088 return;
1089 case CMDINFO_HELP:
1090 fprintf(stream,
1091 "The -bI: flag takes a string indicating which information to provide.\n"
1092 "If the string is not recognised, you'll get this help (on stderr).\n"
1093 "\n"
1094 " exim -bI:help this information\n"
1095 " exim -bI:dscp dscp value keywords known\n"
1096 " exim -bI:sieve list of supported sieve extensions, one per line.\n"
1097 );
1098 return;
1099 case CMDINFO_SIEVE:
1100 for (pp = exim_sieve_extension_list; *pp; ++pp)
1101 fprintf(stream, "%s\n", *pp);
1102 return;
1103 case CMDINFO_DSCP:
1104 dscp_list_to_stream(stream);
1105 return;
1106 }
1107 }
1108
1109
1110 /*************************************************
1111 * Quote a local part *
1112 *************************************************/
1113
1114 /* This function is used when a sender address or a From: or Sender: header
1115 line is being created from the caller's login, or from an authenticated_id. It
1116 applies appropriate quoting rules for a local part.
1117
1118 Argument: the local part
1119 Returns: the local part, quoted if necessary
1120 */
1121
1122 uschar *
1123 local_part_quote(uschar *lpart)
1124 {
1125 BOOL needs_quote = FALSE;
1126 int size, ptr;
1127 uschar *yield;
1128 uschar *t;
1129
1130 for (t = lpart; !needs_quote && *t != 0; t++)
1131 {
1132 needs_quote = !isalnum(*t) && strchr("!#$%&'*+-/=?^_`{|}~", *t) == NULL &&
1133 (*t != '.' || t == lpart || t[1] == 0);
1134 }
1135
1136 if (!needs_quote) return lpart;
1137
1138 size = ptr = 0;
1139 yield = string_catn(NULL, &size, &ptr, US"\"", 1);
1140
1141 for (;;)
1142 {
1143 uschar *nq = US Ustrpbrk(lpart, "\\\"");
1144 if (nq == NULL)
1145 {
1146 yield = string_cat(yield, &size, &ptr, lpart);
1147 break;
1148 }
1149 yield = string_catn(yield, &size, &ptr, lpart, nq - lpart);
1150 yield = string_catn(yield, &size, &ptr, US"\\", 1);
1151 yield = string_catn(yield, &size, &ptr, nq, 1);
1152 lpart = nq + 1;
1153 }
1154
1155 yield = string_catn(yield, &size, &ptr, US"\"", 1);
1156 yield[ptr] = 0;
1157 return yield;
1158 }
1159
1160
1161
1162 #ifdef USE_READLINE
1163 /*************************************************
1164 * Load readline() functions *
1165 *************************************************/
1166
1167 /* This function is called from testing executions that read data from stdin,
1168 but only when running as the calling user. Currently, only -be does this. The
1169 function loads the readline() function library and passes back the functions.
1170 On some systems, it needs the curses library, so load that too, but try without
1171 it if loading fails. All this functionality has to be requested at build time.
1172
1173 Arguments:
1174 fn_readline_ptr pointer to where to put the readline pointer
1175 fn_addhist_ptr pointer to where to put the addhistory function
1176
1177 Returns: the dlopen handle or NULL on failure
1178 */
1179
1180 static void *
1181 set_readline(char * (**fn_readline_ptr)(const char *),
1182 void (**fn_addhist_ptr)(const char *))
1183 {
1184 void *dlhandle;
1185 void *dlhandle_curses = dlopen("libcurses." DYNLIB_FN_EXT, RTLD_GLOBAL|RTLD_LAZY);
1186
1187 dlhandle = dlopen("libreadline." DYNLIB_FN_EXT, RTLD_GLOBAL|RTLD_NOW);
1188 if (dlhandle_curses != NULL) dlclose(dlhandle_curses);
1189
1190 if (dlhandle != NULL)
1191 {
1192 /* Checked manual pages; at least in GNU Readline 6.1, the prototypes are:
1193 * char * readline (const char *prompt);
1194 * void add_history (const char *string);
1195 */
1196 *fn_readline_ptr = (char *(*)(const char*))dlsym(dlhandle, "readline");
1197 *fn_addhist_ptr = (void(*)(const char*))dlsym(dlhandle, "add_history");
1198 }
1199 else
1200 {
1201 DEBUG(D_any) debug_printf("failed to load readline: %s\n", dlerror());
1202 }
1203
1204 return dlhandle;
1205 }
1206 #endif
1207
1208
1209
1210 /*************************************************
1211 * Get a line from stdin for testing things *
1212 *************************************************/
1213
1214 /* This function is called when running tests that can take a number of lines
1215 of input (for example, -be and -bt). It handles continuations and trailing
1216 spaces. And prompting and a blank line output on eof. If readline() is in use,
1217 the arguments are non-NULL and provide the relevant functions.
1218
1219 Arguments:
1220 fn_readline readline function or NULL
1221 fn_addhist addhist function or NULL
1222
1223 Returns: pointer to dynamic memory, or NULL at end of file
1224 */
1225
1226 static uschar *
1227 get_stdinput(char *(*fn_readline)(const char *), void(*fn_addhist)(const char *))
1228 {
1229 int i;
1230 int size = 0;
1231 int ptr = 0;
1232 uschar *yield = NULL;
1233
1234 if (fn_readline == NULL) { printf("> "); fflush(stdout); }
1235
1236 for (i = 0;; i++)
1237 {
1238 uschar buffer[1024];
1239 uschar *p, *ss;
1240
1241 #ifdef USE_READLINE
1242 char *readline_line = NULL;
1243 if (fn_readline != NULL)
1244 {
1245 if ((readline_line = fn_readline((i > 0)? "":"> ")) == NULL) break;
1246 if (*readline_line != 0 && fn_addhist != NULL) fn_addhist(readline_line);
1247 p = US readline_line;
1248 }
1249 else
1250 #endif
1251
1252 /* readline() not in use */
1253
1254 {
1255 if (Ufgets(buffer, sizeof(buffer), stdin) == NULL) break;
1256 p = buffer;
1257 }
1258
1259 /* Handle the line */
1260
1261 ss = p + (int)Ustrlen(p);
1262 while (ss > p && isspace(ss[-1])) ss--;
1263
1264 if (i > 0)
1265 {
1266 while (p < ss && isspace(*p)) p++; /* leading space after cont */
1267 }
1268
1269 yield = string_catn(yield, &size, &ptr, p, ss - p);
1270
1271 #ifdef USE_READLINE
1272 if (fn_readline != NULL) free(readline_line);
1273 #endif
1274
1275 if (ss == p || yield[ptr-1] != '\\')
1276 {
1277 yield[ptr] = 0;
1278 break;
1279 }
1280 yield[--ptr] = 0;
1281 }
1282
1283 if (yield == NULL) printf("\n");
1284 return yield;
1285 }
1286
1287
1288
1289 /*************************************************
1290 * Output usage information for the program *
1291 *************************************************/
1292
1293 /* This function is called when there are no recipients
1294 or a specific --help argument was added.
1295
1296 Arguments:
1297 progname information on what name we were called by
1298
1299 Returns: DOES NOT RETURN
1300 */
1301
1302 static void
1303 exim_usage(uschar *progname)
1304 {
1305
1306 /* Handle specific program invocation varients */
1307 if (Ustrcmp(progname, US"-mailq") == 0)
1308 {
1309 fprintf(stderr,
1310 "mailq - list the contents of the mail queue\n\n"
1311 "For a list of options, see the Exim documentation.\n");
1312 exit(EXIT_FAILURE);
1313 }
1314
1315 /* Generic usage - we output this whatever happens */
1316 fprintf(stderr,
1317 "Exim is a Mail Transfer Agent. It is normally called by Mail User Agents,\n"
1318 "not directly from a shell command line. Options and/or arguments control\n"
1319 "what it does when called. For a list of options, see the Exim documentation.\n");
1320
1321 exit(EXIT_FAILURE);
1322 }
1323
1324
1325
1326 /*************************************************
1327 * Validate that the macros given are okay *
1328 *************************************************/
1329
1330 /* Typically, Exim will drop privileges if macros are supplied. In some
1331 cases, we want to not do so.
1332
1333 Arguments: none (macros is a global)
1334 Returns: true if trusted, false otherwise
1335 */
1336
1337 static BOOL
1338 macros_trusted(void)
1339 {
1340 #ifdef WHITELIST_D_MACROS
1341 macro_item *m;
1342 uschar *whitelisted, *end, *p, **whites, **w;
1343 int white_count, i, n;
1344 size_t len;
1345 BOOL prev_char_item, found;
1346 #endif
1347
1348 if (macros == NULL)
1349 return TRUE;
1350 #ifndef WHITELIST_D_MACROS
1351 return FALSE;
1352 #else
1353
1354 /* We only trust -D overrides for some invoking users:
1355 root, the exim run-time user, the optional config owner user.
1356 I don't know why config-owner would be needed, but since they can own the
1357 config files anyway, there's no security risk to letting them override -D. */
1358 if ( ! ((real_uid == root_uid)
1359 || (real_uid == exim_uid)
1360 #ifdef CONFIGURE_OWNER
1361 || (real_uid == config_uid)
1362 #endif
1363 ))
1364 {
1365 debug_printf("macros_trusted rejecting macros for uid %d\n", (int) real_uid);
1366 return FALSE;
1367 }
1368
1369 /* Get a list of macros which are whitelisted */
1370 whitelisted = string_copy_malloc(US WHITELIST_D_MACROS);
1371 prev_char_item = FALSE;
1372 white_count = 0;
1373 for (p = whitelisted; *p != '\0'; ++p)
1374 {
1375 if (*p == ':' || isspace(*p))
1376 {
1377 *p = '\0';
1378 if (prev_char_item)
1379 ++white_count;
1380 prev_char_item = FALSE;
1381 continue;
1382 }
1383 if (!prev_char_item)
1384 prev_char_item = TRUE;
1385 }
1386 end = p;
1387 if (prev_char_item)
1388 ++white_count;
1389 if (!white_count)
1390 return FALSE;
1391 whites = store_malloc(sizeof(uschar *) * (white_count+1));
1392 for (p = whitelisted, i = 0; (p != end) && (i < white_count); ++p)
1393 {
1394 if (*p != '\0')
1395 {
1396 whites[i++] = p;
1397 if (i == white_count)
1398 break;
1399 while (*p != '\0' && p < end)
1400 ++p;
1401 }
1402 }
1403 whites[i] = NULL;
1404
1405 /* The list of macros should be very short. Accept the N*M complexity. */
1406 for (m = macros; m != NULL; m = m->next)
1407 {
1408 found = FALSE;
1409 for (w = whites; *w; ++w)
1410 if (Ustrcmp(*w, m->name) == 0)
1411 {
1412 found = TRUE;
1413 break;
1414 }
1415 if (!found)
1416 return FALSE;
1417 if (m->replacement == NULL)
1418 continue;
1419 len = Ustrlen(m->replacement);
1420 if (len == 0)
1421 continue;
1422 n = pcre_exec(regex_whitelisted_macro, NULL, CS m->replacement, len,
1423 0, PCRE_EOPT, NULL, 0);
1424 if (n < 0)
1425 {
1426 if (n != PCRE_ERROR_NOMATCH)
1427 debug_printf("macros_trusted checking %s returned %d\n", m->name, n);
1428 return FALSE;
1429 }
1430 }
1431 DEBUG(D_any) debug_printf("macros_trusted overridden to true by whitelisting\n");
1432 return TRUE;
1433 #endif
1434 }
1435
1436
1437 /*************************************************
1438 * Entry point and high-level code *
1439 *************************************************/
1440
1441 /* Entry point for the Exim mailer. Analyse the arguments and arrange to take
1442 the appropriate action. All the necessary functions are present in the one
1443 binary. I originally thought one should split it up, but it turns out that so
1444 much of the apparatus is needed in each chunk that one might as well just have
1445 it all available all the time, which then makes the coding easier as well.
1446
1447 Arguments:
1448 argc count of entries in argv
1449 argv argument strings, with argv[0] being the program name
1450
1451 Returns: EXIT_SUCCESS if terminated successfully
1452 EXIT_FAILURE otherwise, except when a message has been sent
1453 to the sender, and -oee was given
1454 */
1455
1456 int
1457 main(int argc, char **cargv)
1458 {
1459 uschar **argv = USS cargv;
1460 int arg_receive_timeout = -1;
1461 int arg_smtp_receive_timeout = -1;
1462 int arg_error_handling = error_handling;
1463 int filter_sfd = -1;
1464 int filter_ufd = -1;
1465 int group_count;
1466 int i, rv;
1467 int list_queue_option = 0;
1468 int msg_action = 0;
1469 int msg_action_arg = -1;
1470 int namelen = (argv[0] == NULL)? 0 : Ustrlen(argv[0]);
1471 int queue_only_reason = 0;
1472 #ifdef EXIM_PERL
1473 int perl_start_option = 0;
1474 #endif
1475 int recipients_arg = argc;
1476 int sender_address_domain = 0;
1477 int test_retry_arg = -1;
1478 int test_rewrite_arg = -1;
1479 BOOL arg_queue_only = FALSE;
1480 BOOL bi_option = FALSE;
1481 BOOL checking = FALSE;
1482 BOOL count_queue = FALSE;
1483 BOOL expansion_test = FALSE;
1484 BOOL extract_recipients = FALSE;
1485 BOOL flag_G = FALSE;
1486 BOOL flag_n = FALSE;
1487 BOOL forced_delivery = FALSE;
1488 BOOL f_end_dot = FALSE;
1489 BOOL deliver_give_up = FALSE;
1490 BOOL list_queue = FALSE;
1491 BOOL list_options = FALSE;
1492 BOOL list_config = FALSE;
1493 BOOL local_queue_only;
1494 BOOL more = TRUE;
1495 BOOL one_msg_action = FALSE;
1496 BOOL queue_only_set = FALSE;
1497 BOOL receiving_message = TRUE;
1498 BOOL sender_ident_set = FALSE;
1499 BOOL session_local_queue_only;
1500 BOOL unprivileged;
1501 BOOL removed_privilege = FALSE;
1502 BOOL usage_wanted = FALSE;
1503 BOOL verify_address_mode = FALSE;
1504 BOOL verify_as_sender = FALSE;
1505 BOOL version_printed = FALSE;
1506 uschar *alias_arg = NULL;
1507 uschar *called_as = US"";
1508 uschar *cmdline_syslog_name = NULL;
1509 uschar *start_queue_run_id = NULL;
1510 uschar *stop_queue_run_id = NULL;
1511 uschar *expansion_test_message = NULL;
1512 uschar *ftest_domain = NULL;
1513 uschar *ftest_localpart = NULL;
1514 uschar *ftest_prefix = NULL;
1515 uschar *ftest_suffix = NULL;
1516 uschar *log_oneline = NULL;
1517 uschar *malware_test_file = NULL;
1518 uschar *real_sender_address;
1519 uschar *originator_home = US"/";
1520 size_t sz;
1521 void *reset_point;
1522
1523 struct passwd *pw;
1524 struct stat statbuf;
1525 pid_t passed_qr_pid = (pid_t)0;
1526 int passed_qr_pipe = -1;
1527 gid_t group_list[NGROUPS_MAX];
1528
1529 /* For the -bI: flag */
1530 enum commandline_info info_flag = CMDINFO_NONE;
1531 BOOL info_stdout = FALSE;
1532
1533 /* Possible options for -R and -S */
1534
1535 static uschar *rsopts[] = { US"f", US"ff", US"r", US"rf", US"rff" };
1536
1537 /* Need to define this in case we need to change the environment in order
1538 to get rid of a bogus time zone. We have to make it char rather than uschar
1539 because some OS define it in /usr/include/unistd.h. */
1540
1541 extern char **environ;
1542
1543 /* If the Exim user and/or group and/or the configuration file owner/group were
1544 defined by ref:name at build time, we must now find the actual uid/gid values.
1545 This is a feature to make the lives of binary distributors easier. */
1546
1547 #ifdef EXIM_USERNAME
1548 if (route_finduser(US EXIM_USERNAME, &pw, &exim_uid))
1549 {
1550 if (exim_uid == 0)
1551 {
1552 fprintf(stderr, "exim: refusing to run with uid 0 for \"%s\"\n",
1553 EXIM_USERNAME);
1554 exit(EXIT_FAILURE);
1555 }
1556 /* If ref:name uses a number as the name, route_finduser() returns
1557 TRUE with exim_uid set and pw coerced to NULL. */
1558 if (pw)
1559 exim_gid = pw->pw_gid;
1560 #ifndef EXIM_GROUPNAME
1561 else
1562 {
1563 fprintf(stderr,
1564 "exim: ref:name should specify a usercode, not a group.\n"
1565 "exim: can't let you get away with it unless you also specify a group.\n");
1566 exit(EXIT_FAILURE);
1567 }
1568 #endif
1569 }
1570 else
1571 {
1572 fprintf(stderr, "exim: failed to find uid for user name \"%s\"\n",
1573 EXIM_USERNAME);
1574 exit(EXIT_FAILURE);
1575 }
1576 #endif
1577
1578 #ifdef EXIM_GROUPNAME
1579 if (!route_findgroup(US EXIM_GROUPNAME, &exim_gid))
1580 {
1581 fprintf(stderr, "exim: failed to find gid for group name \"%s\"\n",
1582 EXIM_GROUPNAME);
1583 exit(EXIT_FAILURE);
1584 }
1585 #endif
1586
1587 #ifdef CONFIGURE_OWNERNAME
1588 if (!route_finduser(US CONFIGURE_OWNERNAME, NULL, &config_uid))
1589 {
1590 fprintf(stderr, "exim: failed to find uid for user name \"%s\"\n",
1591 CONFIGURE_OWNERNAME);
1592 exit(EXIT_FAILURE);
1593 }
1594 #endif
1595
1596 /* We default the system_filter_user to be the Exim run-time user, as a
1597 sane non-root value. */
1598 system_filter_uid = exim_uid;
1599
1600 #ifdef CONFIGURE_GROUPNAME
1601 if (!route_findgroup(US CONFIGURE_GROUPNAME, &config_gid))
1602 {
1603 fprintf(stderr, "exim: failed to find gid for group name \"%s\"\n",
1604 CONFIGURE_GROUPNAME);
1605 exit(EXIT_FAILURE);
1606 }
1607 #endif
1608
1609 /* In the Cygwin environment, some initialization used to need doing.
1610 It was fudged in by means of this macro; now no longer but we'll leave
1611 it in case of others. */
1612
1613 #ifdef OS_INIT
1614 OS_INIT
1615 #endif
1616
1617 /* Check a field which is patched when we are running Exim within its
1618 testing harness; do a fast initial check, and then the whole thing. */
1619
1620 running_in_test_harness =
1621 *running_status == '<' && Ustrcmp(running_status, "<<<testing>>>") == 0;
1622
1623 /* The C standard says that the equivalent of setlocale(LC_ALL, "C") is obeyed
1624 at the start of a program; however, it seems that some environments do not
1625 follow this. A "strange" locale can affect the formatting of timestamps, so we
1626 make quite sure. */
1627
1628 setlocale(LC_ALL, "C");
1629
1630 /* Set up the default handler for timing using alarm(). */
1631
1632 os_non_restarting_signal(SIGALRM, sigalrm_handler);
1633
1634 /* Ensure we have a buffer for constructing log entries. Use malloc directly,
1635 because store_malloc writes a log entry on failure. */
1636
1637 log_buffer = (uschar *)malloc(LOG_BUFFER_SIZE);
1638 if (log_buffer == NULL)
1639 {
1640 fprintf(stderr, "exim: failed to get store for log buffer\n");
1641 exit(EXIT_FAILURE);
1642 }
1643
1644 /* Initialize the default log options. */
1645
1646 bits_set(log_selector, log_selector_size, log_default);
1647
1648 /* Set log_stderr to stderr, provided that stderr exists. This gets reset to
1649 NULL when the daemon is run and the file is closed. We have to use this
1650 indirection, because some systems don't allow writing to the variable "stderr".
1651 */
1652
1653 if (fstat(fileno(stderr), &statbuf) >= 0) log_stderr = stderr;
1654
1655 /* Arrange for the PCRE regex library to use our store functions. Note that
1656 the normal calls are actually macros that add additional arguments for
1657 debugging purposes so we have to assign specially constructed functions here.
1658 The default is to use store in the stacking pool, but this is overridden in the
1659 regex_must_compile() function. */
1660
1661 pcre_malloc = function_store_get;
1662 pcre_free = function_dummy_free;
1663
1664 /* Ensure there is a big buffer for temporary use in several places. It is put
1665 in malloc store so that it can be freed for enlargement if necessary. */
1666
1667 big_buffer = store_malloc(big_buffer_size);
1668
1669 /* Set up the handler for the data request signal, and set the initial
1670 descriptive text. */
1671
1672 set_process_info("initializing");
1673 os_restarting_signal(SIGUSR1, usr1_handler);
1674
1675 /* SIGHUP is used to get the daemon to reconfigure. It gets set as appropriate
1676 in the daemon code. For the rest of Exim's uses, we ignore it. */
1677
1678 signal(SIGHUP, SIG_IGN);
1679
1680 /* We don't want to die on pipe errors as the code is written to handle
1681 the write error instead. */
1682
1683 signal(SIGPIPE, SIG_IGN);
1684
1685 /* Under some circumstance on some OS, Exim can get called with SIGCHLD
1686 set to SIG_IGN. This causes subprocesses that complete before the parent
1687 process waits for them not to hang around, so when Exim calls wait(), nothing
1688 is there. The wait() code has been made robust against this, but let's ensure
1689 that SIGCHLD is set to SIG_DFL, because it's tidier to wait and get a process
1690 ending status. We use sigaction rather than plain signal() on those OS where
1691 SA_NOCLDWAIT exists, because we want to be sure it is turned off. (There was a
1692 problem on AIX with this.) */
1693
1694 #ifdef SA_NOCLDWAIT
1695 {
1696 struct sigaction act;
1697 act.sa_handler = SIG_DFL;
1698 sigemptyset(&(act.sa_mask));
1699 act.sa_flags = 0;
1700 sigaction(SIGCHLD, &act, NULL);
1701 }
1702 #else
1703 signal(SIGCHLD, SIG_DFL);
1704 #endif
1705
1706 /* Save the arguments for use if we re-exec exim as a daemon after receiving
1707 SIGHUP. */
1708
1709 sighup_argv = argv;
1710
1711 /* Set up the version number. Set up the leading 'E' for the external form of
1712 message ids, set the pointer to the internal form, and initialize it to
1713 indicate no message being processed. */
1714
1715 version_init();
1716 message_id_option[0] = '-';
1717 message_id_external = message_id_option + 1;
1718 message_id_external[0] = 'E';
1719 message_id = message_id_external + 1;
1720 message_id[0] = 0;
1721
1722 /* Set the umask to zero so that any files Exim creates using open() are
1723 created with the modes that it specifies. NOTE: Files created with fopen() have
1724 a problem, which was not recognized till rather late (February 2006). With this
1725 umask, such files will be world writeable. (They are all content scanning files
1726 in the spool directory, which isn't world-accessible, so this is not a
1727 disaster, but it's untidy.) I don't want to change this overall setting,
1728 however, because it will interact badly with the open() calls. Instead, there's
1729 now a function called modefopen() that fiddles with the umask while calling
1730 fopen(). */
1731
1732 (void)umask(0);
1733
1734 /* Precompile the regular expression for matching a message id. Keep this in
1735 step with the code that generates ids in the accept.c module. We need to do
1736 this here, because the -M options check their arguments for syntactic validity
1737 using mac_ismsgid, which uses this. */
1738
1739 regex_ismsgid =
1740 regex_must_compile(US"^(?:[^\\W_]{6}-){2}[^\\W_]{2}$", FALSE, TRUE);
1741
1742 /* Precompile the regular expression that is used for matching an SMTP error
1743 code, possibly extended, at the start of an error message. Note that the
1744 terminating whitespace character is included. */
1745
1746 regex_smtp_code =
1747 regex_must_compile(US"^\\d\\d\\d\\s(?:\\d\\.\\d\\d?\\d?\\.\\d\\d?\\d?\\s)?",
1748 FALSE, TRUE);
1749
1750 #ifdef WHITELIST_D_MACROS
1751 /* Precompile the regular expression used to filter the content of macros
1752 given to -D for permissibility. */
1753
1754 regex_whitelisted_macro =
1755 regex_must_compile(US"^[A-Za-z0-9_/.-]*$", FALSE, TRUE);
1756 #endif
1757
1758 for (i = 0; i < REGEX_VARS; i++) regex_vars[i] = NULL;
1759
1760 /* If the program is called as "mailq" treat it as equivalent to "exim -bp";
1761 this seems to be a generally accepted convention, since one finds symbolic
1762 links called "mailq" in standard OS configurations. */
1763
1764 if ((namelen == 5 && Ustrcmp(argv[0], "mailq") == 0) ||
1765 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/mailq", 6) == 0))
1766 {
1767 list_queue = TRUE;
1768 receiving_message = FALSE;
1769 called_as = US"-mailq";
1770 }
1771
1772 /* If the program is called as "rmail" treat it as equivalent to
1773 "exim -i -oee", thus allowing UUCP messages to be input using non-SMTP mode,
1774 i.e. preventing a single dot on a line from terminating the message, and
1775 returning with zero return code, even in cases of error (provided an error
1776 message has been sent). */
1777
1778 if ((namelen == 5 && Ustrcmp(argv[0], "rmail") == 0) ||
1779 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/rmail", 6) == 0))
1780 {
1781 dot_ends = FALSE;
1782 called_as = US"-rmail";
1783 errors_sender_rc = EXIT_SUCCESS;
1784 }
1785
1786 /* If the program is called as "rsmtp" treat it as equivalent to "exim -bS";
1787 this is a smail convention. */
1788
1789 if ((namelen == 5 && Ustrcmp(argv[0], "rsmtp") == 0) ||
1790 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/rsmtp", 6) == 0))
1791 {
1792 smtp_input = smtp_batched_input = TRUE;
1793 called_as = US"-rsmtp";
1794 }
1795
1796 /* If the program is called as "runq" treat it as equivalent to "exim -q";
1797 this is a smail convention. */
1798
1799 if ((namelen == 4 && Ustrcmp(argv[0], "runq") == 0) ||
1800 (namelen > 4 && Ustrncmp(argv[0] + namelen - 5, "/runq", 5) == 0))
1801 {
1802 queue_interval = 0;
1803 receiving_message = FALSE;
1804 called_as = US"-runq";
1805 }
1806
1807 /* If the program is called as "newaliases" treat it as equivalent to
1808 "exim -bi"; this is a sendmail convention. */
1809
1810 if ((namelen == 10 && Ustrcmp(argv[0], "newaliases") == 0) ||
1811 (namelen > 10 && Ustrncmp(argv[0] + namelen - 11, "/newaliases", 11) == 0))
1812 {
1813 bi_option = TRUE;
1814 receiving_message = FALSE;
1815 called_as = US"-newaliases";
1816 }
1817
1818 /* Save the original effective uid for a couple of uses later. It should
1819 normally be root, but in some esoteric environments it may not be. */
1820
1821 original_euid = geteuid();
1822
1823 /* Get the real uid and gid. If the caller is root, force the effective uid/gid
1824 to be the same as the real ones. This makes a difference only if Exim is setuid
1825 (or setgid) to something other than root, which could be the case in some
1826 special configurations. */
1827
1828 real_uid = getuid();
1829 real_gid = getgid();
1830
1831 if (real_uid == root_uid)
1832 {
1833 rv = setgid(real_gid);
1834 if (rv)
1835 {
1836 fprintf(stderr, "exim: setgid(%ld) failed: %s\n",
1837 (long int)real_gid, strerror(errno));
1838 exit(EXIT_FAILURE);
1839 }
1840 rv = setuid(real_uid);
1841 if (rv)
1842 {
1843 fprintf(stderr, "exim: setuid(%ld) failed: %s\n",
1844 (long int)real_uid, strerror(errno));
1845 exit(EXIT_FAILURE);
1846 }
1847 }
1848
1849 /* If neither the original real uid nor the original euid was root, Exim is
1850 running in an unprivileged state. */
1851
1852 unprivileged = (real_uid != root_uid && original_euid != root_uid);
1853
1854 /* Scan the program's arguments. Some can be dealt with right away; others are
1855 simply recorded for checking and handling afterwards. Do a high-level switch
1856 on the second character (the one after '-'), to save some effort. */
1857
1858 for (i = 1; i < argc; i++)
1859 {
1860 BOOL badarg = FALSE;
1861 uschar *arg = argv[i];
1862 uschar *argrest;
1863 int switchchar;
1864
1865 /* An argument not starting with '-' is the start of a recipients list;
1866 break out of the options-scanning loop. */
1867
1868 if (arg[0] != '-')
1869 {
1870 recipients_arg = i;
1871 break;
1872 }
1873
1874 /* An option consistion of -- terminates the options */
1875
1876 if (Ustrcmp(arg, "--") == 0)
1877 {
1878 recipients_arg = i + 1;
1879 break;
1880 }
1881
1882 /* Handle flagged options */
1883
1884 switchchar = arg[1];
1885 argrest = arg+2;
1886
1887 /* Make all -ex options synonymous with -oex arguments, since that
1888 is assumed by various callers. Also make -qR options synonymous with -R
1889 options, as that seems to be required as well. Allow for -qqR too, and
1890 the same for -S options. */
1891
1892 if (Ustrncmp(arg+1, "oe", 2) == 0 ||
1893 Ustrncmp(arg+1, "qR", 2) == 0 ||
1894 Ustrncmp(arg+1, "qS", 2) == 0)
1895 {
1896 switchchar = arg[2];
1897 argrest++;
1898 }
1899 else if (Ustrncmp(arg+1, "qqR", 3) == 0 || Ustrncmp(arg+1, "qqS", 3) == 0)
1900 {
1901 switchchar = arg[3];
1902 argrest += 2;
1903 queue_2stage = TRUE;
1904 }
1905
1906 /* Make -r synonymous with -f, since it is a documented alias */
1907
1908 else if (arg[1] == 'r') switchchar = 'f';
1909
1910 /* Make -ov synonymous with -v */
1911
1912 else if (Ustrcmp(arg, "-ov") == 0)
1913 {
1914 switchchar = 'v';
1915 argrest++;
1916 }
1917
1918 /* deal with --option_aliases */
1919 else if (switchchar == '-')
1920 {
1921 if (Ustrcmp(argrest, "help") == 0)
1922 {
1923 usage_wanted = TRUE;
1924 break;
1925 }
1926 else if (Ustrcmp(argrest, "version") == 0)
1927 {
1928 switchchar = 'b';
1929 argrest = US"V";
1930 }
1931 }
1932
1933 /* High-level switch on active initial letter */
1934
1935 switch(switchchar)
1936 {
1937
1938 /* sendmail uses -Ac and -Am to control which .cf file is used;
1939 we ignore them. */
1940 case 'A':
1941 if (*argrest == '\0') { badarg = TRUE; break; }
1942 else
1943 {
1944 BOOL ignore = FALSE;
1945 switch (*argrest)
1946 {
1947 case 'c':
1948 case 'm':
1949 if (*(argrest + 1) == '\0')
1950 ignore = TRUE;
1951 break;
1952 }
1953 if (!ignore) { badarg = TRUE; break; }
1954 }
1955 break;
1956
1957 /* -Btype is a sendmail option for 7bit/8bit setting. Exim is 8-bit clean
1958 so has no need of it. */
1959
1960 case 'B':
1961 if (*argrest == 0) i++; /* Skip over the type */
1962 break;
1963
1964
1965 case 'b':
1966 receiving_message = FALSE; /* Reset TRUE for -bm, -bS, -bs below */
1967
1968 /* -bd: Run in daemon mode, awaiting SMTP connections.
1969 -bdf: Ditto, but in the foreground.
1970 */
1971
1972 if (*argrest == 'd')
1973 {
1974 daemon_listen = TRUE;
1975 if (*(++argrest) == 'f') background_daemon = FALSE;
1976 else if (*argrest != 0) { badarg = TRUE; break; }
1977 }
1978
1979 /* -be: Run in expansion test mode
1980 -bem: Ditto, but read a message from a file first
1981 */
1982
1983 else if (*argrest == 'e')
1984 {
1985 expansion_test = checking = TRUE;
1986 if (argrest[1] == 'm')
1987 {
1988 if (++i >= argc) { badarg = TRUE; break; }
1989 expansion_test_message = argv[i];
1990 argrest++;
1991 }
1992 if (argrest[1] != 0) { badarg = TRUE; break; }
1993 }
1994
1995 /* -bF: Run system filter test */
1996
1997 else if (*argrest == 'F')
1998 {
1999 filter_test |= checking = FTEST_SYSTEM;
2000 if (*(++argrest) != 0) { badarg = TRUE; break; }
2001 if (++i < argc) filter_test_sfile = argv[i]; else
2002 {
2003 fprintf(stderr, "exim: file name expected after %s\n", argv[i-1]);
2004 exit(EXIT_FAILURE);
2005 }
2006 }
2007
2008 /* -bf: Run user filter test
2009 -bfd: Set domain for filter testing
2010 -bfl: Set local part for filter testing
2011 -bfp: Set prefix for filter testing
2012 -bfs: Set suffix for filter testing
2013 */
2014
2015 else if (*argrest == 'f')
2016 {
2017 if (*(++argrest) == 0)
2018 {
2019 filter_test |= checking = FTEST_USER;
2020 if (++i < argc) filter_test_ufile = argv[i]; else
2021 {
2022 fprintf(stderr, "exim: file name expected after %s\n", argv[i-1]);
2023 exit(EXIT_FAILURE);
2024 }
2025 }
2026 else
2027 {
2028 if (++i >= argc)
2029 {
2030 fprintf(stderr, "exim: string expected after %s\n", arg);
2031 exit(EXIT_FAILURE);
2032 }
2033 if (Ustrcmp(argrest, "d") == 0) ftest_domain = argv[i];
2034 else if (Ustrcmp(argrest, "l") == 0) ftest_localpart = argv[i];
2035 else if (Ustrcmp(argrest, "p") == 0) ftest_prefix = argv[i];
2036 else if (Ustrcmp(argrest, "s") == 0) ftest_suffix = argv[i];
2037 else { badarg = TRUE; break; }
2038 }
2039 }
2040
2041 /* -bh: Host checking - an IP address must follow. */
2042
2043 else if (Ustrcmp(argrest, "h") == 0 || Ustrcmp(argrest, "hc") == 0)
2044 {
2045 if (++i >= argc) { badarg = TRUE; break; }
2046 sender_host_address = argv[i];
2047 host_checking = checking = log_testing_mode = TRUE;
2048 host_checking_callout = argrest[1] == 'c';
2049 }
2050
2051 /* -bi: This option is used by sendmail to initialize *the* alias file,
2052 though it has the -oA option to specify a different file. Exim has no
2053 concept of *the* alias file, but since Sun's YP make script calls
2054 sendmail this way, some support must be provided. */
2055
2056 else if (Ustrcmp(argrest, "i") == 0) bi_option = TRUE;
2057
2058 /* -bI: provide information, of the type to follow after a colon.
2059 This is an Exim flag. */
2060
2061 else if (argrest[0] == 'I' && Ustrlen(argrest) >= 2 && argrest[1] == ':')
2062 {
2063 uschar *p = &argrest[2];
2064 info_flag = CMDINFO_HELP;
2065 if (Ustrlen(p))
2066 {
2067 if (strcmpic(p, CUS"sieve") == 0)
2068 {
2069 info_flag = CMDINFO_SIEVE;
2070 info_stdout = TRUE;
2071 }
2072 else if (strcmpic(p, CUS"dscp") == 0)
2073 {
2074 info_flag = CMDINFO_DSCP;
2075 info_stdout = TRUE;
2076 }
2077 else if (strcmpic(p, CUS"help") == 0)
2078 {
2079 info_stdout = TRUE;
2080 }
2081 }
2082 }
2083
2084 /* -bm: Accept and deliver message - the default option. Reinstate
2085 receiving_message, which got turned off for all -b options. */
2086
2087 else if (Ustrcmp(argrest, "m") == 0) receiving_message = TRUE;
2088
2089 /* -bmalware: test the filename given for malware */
2090
2091 else if (Ustrcmp(argrest, "malware") == 0)
2092 {
2093 if (++i >= argc) { badarg = TRUE; break; }
2094 checking = TRUE;
2095 malware_test_file = argv[i];
2096 }
2097
2098 /* -bnq: For locally originating messages, do not qualify unqualified
2099 addresses. In the envelope, this causes errors; in header lines they
2100 just get left. */
2101
2102 else if (Ustrcmp(argrest, "nq") == 0)
2103 {
2104 allow_unqualified_sender = FALSE;
2105 allow_unqualified_recipient = FALSE;
2106 }
2107
2108 /* -bpxx: List the contents of the mail queue, in various forms. If
2109 the option is -bpc, just a queue count is needed. Otherwise, if the
2110 first letter after p is r, then order is random. */
2111
2112 else if (*argrest == 'p')
2113 {
2114 if (*(++argrest) == 'c')
2115 {
2116 count_queue = TRUE;
2117 if (*(++argrest) != 0) badarg = TRUE;
2118 break;
2119 }
2120
2121 if (*argrest == 'r')
2122 {
2123 list_queue_option = 8;
2124 argrest++;
2125 }
2126 else list_queue_option = 0;
2127
2128 list_queue = TRUE;
2129
2130 /* -bp: List the contents of the mail queue, top-level only */
2131
2132 if (*argrest == 0) {}
2133
2134 /* -bpu: List the contents of the mail queue, top-level undelivered */
2135
2136 else if (Ustrcmp(argrest, "u") == 0) list_queue_option += 1;
2137
2138 /* -bpa: List the contents of the mail queue, including all delivered */
2139
2140 else if (Ustrcmp(argrest, "a") == 0) list_queue_option += 2;
2141
2142 /* Unknown after -bp[r] */
2143
2144 else
2145 {
2146 badarg = TRUE;
2147 break;
2148 }
2149 }
2150
2151
2152 /* -bP: List the configuration variables given as the address list.
2153 Force -v, so configuration errors get displayed. */
2154
2155 else if (Ustrcmp(argrest, "P") == 0)
2156 {
2157 /* -bP config: we need to setup here, because later,
2158 * when list_options is checked, the config is read already */
2159 if (argv[i+1] && Ustrcmp(argv[i+1], "config") == 0)
2160 {
2161 list_config = TRUE;
2162 readconf_save_config(version_string);
2163 }
2164 else
2165 {
2166 list_options = TRUE;
2167 debug_selector |= D_v;
2168 debug_file = stderr;
2169 }
2170 }
2171
2172 /* -brt: Test retry configuration lookup */
2173
2174 else if (Ustrcmp(argrest, "rt") == 0)
2175 {
2176 checking = TRUE;
2177 test_retry_arg = i + 1;
2178 goto END_ARG;
2179 }
2180
2181 /* -brw: Test rewrite configuration */
2182
2183 else if (Ustrcmp(argrest, "rw") == 0)
2184 {
2185 checking = TRUE;
2186 test_rewrite_arg = i + 1;
2187 goto END_ARG;
2188 }
2189
2190 /* -bS: Read SMTP commands on standard input, but produce no replies -
2191 all errors are reported by sending messages. */
2192
2193 else if (Ustrcmp(argrest, "S") == 0)
2194 smtp_input = smtp_batched_input = receiving_message = TRUE;
2195
2196 /* -bs: Read SMTP commands on standard input and produce SMTP replies
2197 on standard output. */
2198
2199 else if (Ustrcmp(argrest, "s") == 0) smtp_input = receiving_message = TRUE;
2200
2201 /* -bt: address testing mode */
2202
2203 else if (Ustrcmp(argrest, "t") == 0)
2204 address_test_mode = checking = log_testing_mode = TRUE;
2205
2206 /* -bv: verify addresses */
2207
2208 else if (Ustrcmp(argrest, "v") == 0)
2209 verify_address_mode = checking = log_testing_mode = TRUE;
2210
2211 /* -bvs: verify sender addresses */
2212
2213 else if (Ustrcmp(argrest, "vs") == 0)
2214 {
2215 verify_address_mode = checking = log_testing_mode = TRUE;
2216 verify_as_sender = TRUE;
2217 }
2218
2219 /* -bV: Print version string and support details */
2220
2221 else if (Ustrcmp(argrest, "V") == 0)
2222 {
2223 printf("Exim version %s #%s built %s\n", version_string,
2224 version_cnumber, version_date);
2225 printf("%s\n", CS version_copyright);
2226 version_printed = TRUE;
2227 show_whats_supported(stdout);
2228 log_testing_mode = TRUE;
2229 }
2230
2231 /* -bw: inetd wait mode, accept a listening socket as stdin */
2232
2233 else if (*argrest == 'w')
2234 {
2235 inetd_wait_mode = TRUE;
2236 background_daemon = FALSE;
2237 daemon_listen = TRUE;
2238 if (*(++argrest) != '\0')
2239 {
2240 inetd_wait_timeout = readconf_readtime(argrest, 0, FALSE);
2241 if (inetd_wait_timeout <= 0)
2242 {
2243 fprintf(stderr, "exim: bad time value %s: abandoned\n", argv[i]);
2244 exit(EXIT_FAILURE);
2245 }
2246 }
2247 }
2248
2249 else badarg = TRUE;
2250 break;
2251
2252
2253 /* -C: change configuration file list; ignore if it isn't really
2254 a change! Enforce a prefix check if required. */
2255
2256 case 'C':
2257 if (*argrest == 0)
2258 {
2259 if(++i < argc) argrest = argv[i]; else
2260 { badarg = TRUE; break; }
2261 }
2262 if (Ustrcmp(config_main_filelist, argrest) != 0)
2263 {
2264 #ifdef ALT_CONFIG_PREFIX
2265 int sep = 0;
2266 int len = Ustrlen(ALT_CONFIG_PREFIX);
2267 uschar *list = argrest;
2268 uschar *filename;
2269 while((filename = string_nextinlist(&list, &sep, big_buffer,
2270 big_buffer_size)) != NULL)
2271 {
2272 if ((Ustrlen(filename) < len ||
2273 Ustrncmp(filename, ALT_CONFIG_PREFIX, len) != 0 ||
2274 Ustrstr(filename, "/../") != NULL) &&
2275 (Ustrcmp(filename, "/dev/null") != 0 || real_uid != root_uid))
2276 {
2277 fprintf(stderr, "-C Permission denied\n");
2278 exit(EXIT_FAILURE);
2279 }
2280 }
2281 #endif
2282 if (real_uid != root_uid)
2283 {
2284 #ifdef TRUSTED_CONFIG_LIST
2285
2286 if (real_uid != exim_uid
2287 #ifdef CONFIGURE_OWNER
2288 && real_uid != config_uid
2289 #endif
2290 )
2291 trusted_config = FALSE;
2292 else
2293 {
2294 FILE *trust_list = Ufopen(TRUSTED_CONFIG_LIST, "rb");
2295 if (trust_list)
2296 {
2297 struct stat statbuf;
2298
2299 if (fstat(fileno(trust_list), &statbuf) != 0 ||
2300 (statbuf.st_uid != root_uid /* owner not root */
2301 #ifdef CONFIGURE_OWNER
2302 && statbuf.st_uid != config_uid /* owner not the special one */
2303 #endif
2304 ) || /* or */
2305 (statbuf.st_gid != root_gid /* group not root */
2306 #ifdef CONFIGURE_GROUP
2307 && statbuf.st_gid != config_gid /* group not the special one */
2308 #endif
2309 && (statbuf.st_mode & 020) != 0 /* group writeable */
2310 ) || /* or */
2311 (statbuf.st_mode & 2) != 0) /* world writeable */
2312 {
2313 trusted_config = FALSE;
2314 fclose(trust_list);
2315 }
2316 else
2317 {
2318 /* Well, the trust list at least is up to scratch... */
2319 void *reset_point = store_get(0);
2320 uschar *trusted_configs[32];
2321 int nr_configs = 0;
2322 int i = 0;
2323
2324 while (Ufgets(big_buffer, big_buffer_size, trust_list))
2325 {
2326 uschar *start = big_buffer, *nl;
2327 while (*start && isspace(*start))
2328 start++;
2329 if (*start != '/')
2330 continue;
2331 nl = Ustrchr(start, '\n');
2332 if (nl)
2333 *nl = 0;
2334 trusted_configs[nr_configs++] = string_copy(start);
2335 if (nr_configs == 32)
2336 break;
2337 }
2338 fclose(trust_list);
2339
2340 if (nr_configs)
2341 {
2342 int sep = 0;
2343 const uschar *list = argrest;
2344 uschar *filename;
2345 while (trusted_config && (filename = string_nextinlist(&list,
2346 &sep, big_buffer, big_buffer_size)) != NULL)
2347 {
2348 for (i=0; i < nr_configs; i++)
2349 {
2350 if (Ustrcmp(filename, trusted_configs[i]) == 0)
2351 break;
2352 }
2353 if (i == nr_configs)
2354 {
2355 trusted_config = FALSE;
2356 break;
2357 }
2358 }
2359 store_reset(reset_point);
2360 }
2361 else
2362 {
2363 /* No valid prefixes found in trust_list file. */
2364 trusted_config = FALSE;
2365 }
2366 }
2367 }
2368 else
2369 {
2370 /* Could not open trust_list file. */
2371 trusted_config = FALSE;
2372 }
2373 }
2374 #else
2375 /* Not root; don't trust config */
2376 trusted_config = FALSE;
2377 #endif
2378 }
2379
2380 config_main_filelist = argrest;
2381 config_changed = TRUE;
2382 }
2383 break;
2384
2385
2386 /* -D: set up a macro definition */
2387
2388 case 'D':
2389 #ifdef DISABLE_D_OPTION
2390 fprintf(stderr, "exim: -D is not available in this Exim binary\n");
2391 exit(EXIT_FAILURE);
2392 #else
2393 {
2394 int ptr = 0;
2395 macro_item *mlast = NULL;
2396 macro_item *m;
2397 uschar name[24];
2398 uschar *s = argrest;
2399
2400 while (isspace(*s)) s++;
2401
2402 if (*s < 'A' || *s > 'Z')
2403 {
2404 fprintf(stderr, "exim: macro name set by -D must start with "
2405 "an upper case letter\n");
2406 exit(EXIT_FAILURE);
2407 }
2408
2409 while (isalnum(*s) || *s == '_')
2410 {
2411 if (ptr < sizeof(name)-1) name[ptr++] = *s;
2412 s++;
2413 }
2414 name[ptr] = 0;
2415 if (ptr == 0) { badarg = TRUE; break; }
2416 while (isspace(*s)) s++;
2417 if (*s != 0)
2418 {
2419 if (*s++ != '=') { badarg = TRUE; break; }
2420 while (isspace(*s)) s++;
2421 }
2422
2423 for (m = macros; m != NULL; m = m->next)
2424 {
2425 if (Ustrcmp(m->name, name) == 0)
2426 {
2427 fprintf(stderr, "exim: duplicated -D in command line\n");
2428 exit(EXIT_FAILURE);
2429 }
2430 mlast = m;
2431 }
2432
2433 m = store_get(sizeof(macro_item) + Ustrlen(name));
2434 m->next = NULL;
2435 m->command_line = TRUE;
2436 if (mlast == NULL) macros = m; else mlast->next = m;
2437 Ustrcpy(m->name, name);
2438 m->replacement = string_copy(s);
2439
2440 if (clmacro_count >= MAX_CLMACROS)
2441 {
2442 fprintf(stderr, "exim: too many -D options on command line\n");
2443 exit(EXIT_FAILURE);
2444 }
2445 clmacros[clmacro_count++] = string_sprintf("-D%s=%s", m->name,
2446 m->replacement);
2447 }
2448 #endif
2449 break;
2450
2451 /* -d: Set debug level (see also -v below) or set the drop_cr option.
2452 The latter is now a no-op, retained for compatibility only. If -dd is used,
2453 debugging subprocesses of the daemon is disabled. */
2454
2455 case 'd':
2456 if (Ustrcmp(argrest, "ropcr") == 0)
2457 {
2458 /* drop_cr = TRUE; */
2459 }
2460
2461 /* Use an intermediate variable so that we don't set debugging while
2462 decoding the debugging bits. */
2463
2464 else
2465 {
2466 unsigned int selector = D_default;
2467 debug_selector = 0;
2468 debug_file = NULL;
2469 if (*argrest == 'd')
2470 {
2471 debug_daemon = TRUE;
2472 argrest++;
2473 }
2474 if (*argrest != 0)
2475 decode_bits(&selector, 1, debug_notall, argrest,
2476 debug_options, debug_options_count, US"debug", 0);
2477 debug_selector = selector;
2478 }
2479 break;
2480
2481
2482 /* -E: This is a local error message. This option is not intended for
2483 external use at all, but is not restricted to trusted callers because it
2484 does no harm (just suppresses certain error messages) and if Exim is run
2485 not setuid root it won't always be trusted when it generates error
2486 messages using this option. If there is a message id following -E, point
2487 message_reference at it, for logging. */
2488
2489 case 'E':
2490 local_error_message = TRUE;
2491 if (mac_ismsgid(argrest)) message_reference = argrest;
2492 break;
2493
2494
2495 /* -ex: The vacation program calls sendmail with the undocumented "-eq"
2496 option, so it looks as if historically the -oex options are also callable
2497 without the leading -o. So we have to accept them. Before the switch,
2498 anything starting -oe has been converted to -e. Exim does not support all
2499 of the sendmail error options. */
2500
2501 case 'e':
2502 if (Ustrcmp(argrest, "e") == 0)
2503 {
2504 arg_error_handling = ERRORS_SENDER;
2505 errors_sender_rc = EXIT_SUCCESS;
2506 }
2507 else if (Ustrcmp(argrest, "m") == 0) arg_error_handling = ERRORS_SENDER;
2508 else if (Ustrcmp(argrest, "p") == 0) arg_error_handling = ERRORS_STDERR;
2509 else if (Ustrcmp(argrest, "q") == 0) arg_error_handling = ERRORS_STDERR;
2510 else if (Ustrcmp(argrest, "w") == 0) arg_error_handling = ERRORS_SENDER;
2511 else badarg = TRUE;
2512 break;
2513
2514
2515 /* -F: Set sender's full name, used instead of the gecos entry from
2516 the password file. Since users can usually alter their gecos entries,
2517 there's no security involved in using this instead. The data can follow
2518 the -F or be in the next argument. */
2519
2520 case 'F':
2521 if (*argrest == 0)
2522 {
2523 if(++i < argc) argrest = argv[i]; else
2524 { badarg = TRUE; break; }
2525 }
2526 originator_name = argrest;
2527 sender_name_forced = TRUE;
2528 break;
2529
2530
2531 /* -f: Set sender's address - this value is only actually used if Exim is
2532 run by a trusted user, or if untrusted_set_sender is set and matches the
2533 address, except that the null address can always be set by any user. The
2534 test for this happens later, when the value given here is ignored when not
2535 permitted. For an untrusted user, the actual sender is still put in Sender:
2536 if it doesn't match the From: header (unless no_local_from_check is set).
2537 The data can follow the -f or be in the next argument. The -r switch is an
2538 obsolete form of -f but since there appear to be programs out there that
2539 use anything that sendmail has ever supported, better accept it - the
2540 synonymizing is done before the switch above.
2541
2542 At this stage, we must allow domain literal addresses, because we don't
2543 know what the setting of allow_domain_literals is yet. Ditto for trailing
2544 dots and strip_trailing_dot. */
2545
2546 case 'f':
2547 {
2548 int dummy_start, dummy_end;
2549 uschar *errmess;
2550 if (*argrest == 0)
2551 {
2552 if (i+1 < argc) argrest = argv[++i]; else
2553 { badarg = TRUE; break; }
2554 }
2555 if (*argrest == 0)
2556 sender_address = string_sprintf(""); /* Ensure writeable memory */
2557 else
2558 {
2559 uschar *temp = argrest + Ustrlen(argrest) - 1;
2560 while (temp >= argrest && isspace(*temp)) temp--;
2561 if (temp >= argrest && *temp == '.') f_end_dot = TRUE;
2562 allow_domain_literals = TRUE;
2563 strip_trailing_dot = TRUE;
2564 #ifdef SUPPORT_I18N
2565 allow_utf8_domains = TRUE;
2566 #endif
2567 sender_address = parse_extract_address(argrest, &errmess,
2568 &dummy_start, &dummy_end, &sender_address_domain, TRUE);
2569 #ifdef SUPPORT_I18N
2570 message_smtputf8 = string_is_utf8(sender_address);
2571 allow_utf8_domains = FALSE;
2572 #endif
2573 allow_domain_literals = FALSE;
2574 strip_trailing_dot = FALSE;
2575 if (sender_address == NULL)
2576 {
2577 fprintf(stderr, "exim: bad -f address \"%s\": %s\n", argrest, errmess);
2578 return EXIT_FAILURE;
2579 }
2580 }
2581 sender_address_forced = TRUE;
2582 }
2583 break;
2584
2585 /* -G: sendmail invocation to specify that it's a gateway submission and
2586 sendmail may complain about problems instead of fixing them.
2587 We make it equivalent to an ACL "control = suppress_local_fixups" and do
2588 not at this time complain about problems. */
2589
2590 case 'G':
2591 flag_G = TRUE;
2592 break;
2593
2594 /* -h: Set the hop count for an incoming message. Exim does not currently
2595 support this; it always computes it by counting the Received: headers.
2596 To put it in will require a change to the spool header file format. */
2597
2598 case 'h':
2599 if (*argrest == 0)
2600 {
2601 if(++i < argc) argrest = argv[i]; else
2602 { badarg = TRUE; break; }
2603 }
2604 if (!isdigit(*argrest)) badarg = TRUE;
2605 break;
2606
2607
2608 /* -i: Set flag so dot doesn't end non-SMTP input (same as -oi, seems
2609 not to be documented for sendmail but mailx (at least) uses it) */
2610
2611 case 'i':
2612 if (*argrest == 0) dot_ends = FALSE; else badarg = TRUE;
2613 break;
2614
2615
2616 /* -L: set the identifier used for syslog; equivalent to setting
2617 syslog_processname in the config file, but needs to be an admin option. */
2618
2619 case 'L':
2620 if (*argrest == '\0')
2621 {
2622 if(++i < argc) argrest = argv[i]; else
2623 { badarg = TRUE; break; }
2624 }
2625 sz = Ustrlen(argrest);
2626 if (sz > 32)
2627 {
2628 fprintf(stderr, "exim: the -L syslog name is too long: \"%s\"\n", argrest);
2629 return EXIT_FAILURE;
2630 }
2631 if (sz < 1)
2632 {
2633 fprintf(stderr, "exim: the -L syslog name is too short\n");
2634 return EXIT_FAILURE;
2635 }
2636 cmdline_syslog_name = argrest;
2637 break;
2638
2639 case 'M':
2640 receiving_message = FALSE;
2641
2642 /* -MC: continue delivery of another message via an existing open
2643 file descriptor. This option is used for an internal call by the
2644 smtp transport when there is a pending message waiting to go to an
2645 address to which it has got a connection. Five subsequent arguments are
2646 required: transport name, host name, IP address, sequence number, and
2647 message_id. Transports may decline to create new processes if the sequence
2648 number gets too big. The channel is stdin. This (-MC) must be the last
2649 argument. There's a subsequent check that the real-uid is privileged.
2650
2651 If we are running in the test harness. delay for a bit, to let the process
2652 that set this one up complete. This makes for repeatability of the logging,
2653 etc. output. */
2654
2655 if (Ustrcmp(argrest, "C") == 0)
2656 {
2657 union sockaddr_46 interface_sock;
2658 EXIM_SOCKLEN_T size = sizeof(interface_sock);
2659
2660 if (argc != i + 6)
2661 {
2662 fprintf(stderr, "exim: too many or too few arguments after -MC\n");
2663 return EXIT_FAILURE;
2664 }
2665
2666 if (msg_action_arg >= 0)
2667 {
2668 fprintf(stderr, "exim: incompatible arguments\n");
2669 return EXIT_FAILURE;
2670 }
2671
2672 continue_transport = argv[++i];
2673 continue_hostname = argv[++i];
2674 continue_host_address = argv[++i];
2675 continue_sequence = Uatoi(argv[++i]);
2676 msg_action = MSG_DELIVER;
2677 msg_action_arg = ++i;
2678 forced_delivery = TRUE;
2679 queue_run_pid = passed_qr_pid;
2680 queue_run_pipe = passed_qr_pipe;
2681
2682 if (!mac_ismsgid(argv[i]))
2683 {
2684 fprintf(stderr, "exim: malformed message id %s after -MC option\n",
2685 argv[i]);
2686 return EXIT_FAILURE;
2687 }
2688
2689 /* Set up $sending_ip_address and $sending_port */
2690
2691 if (getsockname(fileno(stdin), (struct sockaddr *)(&interface_sock),
2692 &size) == 0)
2693 sending_ip_address = host_ntoa(-1, &interface_sock, NULL,
2694 &sending_port);
2695 else
2696 {
2697 fprintf(stderr, "exim: getsockname() failed after -MC option: %s\n",
2698 strerror(errno));
2699 return EXIT_FAILURE;
2700 }
2701
2702 if (running_in_test_harness) millisleep(500);
2703 break;
2704 }
2705
2706 /* -MCA: set the smtp_authenticated flag; this is useful only when it
2707 precedes -MC (see above). The flag indicates that the host to which
2708 Exim is connected has accepted an AUTH sequence. */
2709
2710 else if (Ustrcmp(argrest, "CA") == 0)
2711 {
2712 smtp_authenticated = TRUE;
2713 break;
2714 }
2715
2716 /* -MCD: set the smtp_use_dsn flag; this indicates that the host
2717 that exim is connected to supports the esmtp extension DSN */
2718 else if (Ustrcmp(argrest, "CD") == 0)
2719 {
2720 smtp_use_dsn = TRUE;
2721 break;
2722 }
2723
2724 /* -MCP: set the smtp_use_pipelining flag; this is useful only when
2725 it preceded -MC (see above) */
2726
2727 else if (Ustrcmp(argrest, "CP") == 0)
2728 {
2729 smtp_use_pipelining = TRUE;
2730 break;
2731 }
2732
2733 /* -MCQ: pass on the pid of the queue-running process that started
2734 this chain of deliveries and the fd of its synchronizing pipe; this
2735 is useful only when it precedes -MC (see above) */
2736
2737 else if (Ustrcmp(argrest, "CQ") == 0)
2738 {
2739 if(++i < argc) passed_qr_pid = (pid_t)(Uatol(argv[i]));
2740 else badarg = TRUE;
2741 if(++i < argc) passed_qr_pipe = (int)(Uatol(argv[i]));
2742 else badarg = TRUE;
2743 break;
2744 }
2745
2746 /* -MCS: set the smtp_use_size flag; this is useful only when it
2747 precedes -MC (see above) */
2748
2749 else if (Ustrcmp(argrest, "CS") == 0)
2750 {
2751 smtp_use_size = TRUE;
2752 break;
2753 }
2754
2755 /* -MCT: set the tls_offered flag; this is useful only when it
2756 precedes -MC (see above). The flag indicates that the host to which
2757 Exim is connected has offered TLS support. */
2758
2759 #ifdef SUPPORT_TLS
2760 else if (Ustrcmp(argrest, "CT") == 0)
2761 {
2762 tls_offered = TRUE;
2763 break;
2764 }
2765 #endif
2766
2767 /* -M[x]: various operations on the following list of message ids:
2768 -M deliver the messages, ignoring next retry times and thawing
2769 -Mc deliver the messages, checking next retry times, no thawing
2770 -Mf freeze the messages
2771 -Mg give up on the messages
2772 -Mt thaw the messages
2773 -Mrm remove the messages
2774 In the above cases, this must be the last option. There are also the
2775 following options which are followed by a single message id, and which
2776 act on that message. Some of them use the "recipient" addresses as well.
2777 -Mar add recipient(s)
2778 -Mmad mark all recipients delivered
2779 -Mmd mark recipients(s) delivered
2780 -Mes edit sender
2781 -Mset load a message for use with -be
2782 -Mvb show body
2783 -Mvc show copy (of whole message, in RFC 2822 format)
2784 -Mvh show header
2785 -Mvl show log
2786 */
2787
2788 else if (*argrest == 0)
2789 {
2790 msg_action = MSG_DELIVER;
2791 forced_delivery = deliver_force_thaw = TRUE;
2792 }
2793 else if (Ustrcmp(argrest, "ar") == 0)
2794 {
2795 msg_action = MSG_ADD_RECIPIENT;
2796 one_msg_action = TRUE;
2797 }
2798 else if (Ustrcmp(argrest, "c") == 0) msg_action = MSG_DELIVER;
2799 else if (Ustrcmp(argrest, "es") == 0)
2800 {
2801 msg_action = MSG_EDIT_SENDER;
2802 one_msg_action = TRUE;
2803 }
2804 else if (Ustrcmp(argrest, "f") == 0) msg_action = MSG_FREEZE;
2805 else if (Ustrcmp(argrest, "g") == 0)
2806 {
2807 msg_action = MSG_DELIVER;
2808 deliver_give_up = TRUE;
2809 }
2810 else if (Ustrcmp(argrest, "mad") == 0)
2811 {
2812 msg_action = MSG_MARK_ALL_DELIVERED;
2813 }
2814 else if (Ustrcmp(argrest, "md") == 0)
2815 {
2816 msg_action = MSG_MARK_DELIVERED;
2817 one_msg_action = TRUE;
2818 }
2819 else if (Ustrcmp(argrest, "rm") == 0) msg_action = MSG_REMOVE;
2820 else if (Ustrcmp(argrest, "set") == 0)
2821 {
2822 msg_action = MSG_LOAD;
2823 one_msg_action = TRUE;
2824 }
2825 else if (Ustrcmp(argrest, "t") == 0) msg_action = MSG_THAW;
2826 else if (Ustrcmp(argrest, "vb") == 0)
2827 {
2828 msg_action = MSG_SHOW_BODY;
2829 one_msg_action = TRUE;
2830 }
2831 else if (Ustrcmp(argrest, "vc") == 0)
2832 {
2833 msg_action = MSG_SHOW_COPY;
2834 one_msg_action = TRUE;
2835 }
2836 else if (Ustrcmp(argrest, "vh") == 0)
2837 {
2838 msg_action = MSG_SHOW_HEADER;
2839 one_msg_action = TRUE;
2840 }
2841 else if (Ustrcmp(argrest, "vl") == 0)
2842 {
2843 msg_action = MSG_SHOW_LOG;
2844 one_msg_action = TRUE;
2845 }
2846 else { badarg = TRUE; break; }
2847
2848 /* All the -Mxx options require at least one message id. */
2849
2850 msg_action_arg = i + 1;
2851 if (msg_action_arg >= argc)
2852 {
2853 fprintf(stderr, "exim: no message ids given after %s option\n", arg);
2854 return EXIT_FAILURE;
2855 }
2856
2857 /* Some require only message ids to follow */
2858
2859 if (!one_msg_action)
2860 {
2861 int j;
2862 for (j = msg_action_arg; j < argc; j++) if (!mac_ismsgid(argv[j]))
2863 {
2864 fprintf(stderr, "exim: malformed message id %s after %s option\n",
2865 argv[j], arg);
2866 return EXIT_FAILURE;
2867 }
2868 goto END_ARG; /* Remaining args are ids */
2869 }
2870
2871 /* Others require only one message id, possibly followed by addresses,
2872 which will be handled as normal arguments. */
2873
2874 else
2875 {
2876 if (!mac_ismsgid(argv[msg_action_arg]))
2877 {
2878 fprintf(stderr, "exim: malformed message id %s after %s option\n",
2879 argv[msg_action_arg], arg);
2880 return EXIT_FAILURE;
2881 }
2882 i++;
2883 }
2884 break;
2885
2886
2887 /* Some programs seem to call the -om option without the leading o;
2888 for sendmail it askes for "me too". Exim always does this. */
2889
2890 case 'm':
2891 if (*argrest != 0) badarg = TRUE;
2892 break;
2893
2894
2895 /* -N: don't do delivery - a debugging option that stops transports doing
2896 their thing. It implies debugging at the D_v level. */
2897
2898 case 'N':
2899 if (*argrest == 0)
2900 {
2901 dont_deliver = TRUE;
2902 debug_selector |= D_v;
2903 debug_file = stderr;
2904 }
2905 else badarg = TRUE;
2906 break;
2907
2908
2909 /* -n: This means "don't alias" in sendmail, apparently.
2910 For normal invocations, it has no effect.
2911 It may affect some other options. */
2912
2913 case 'n':
2914 flag_n = TRUE;
2915 break;
2916
2917 /* -O: Just ignore it. In sendmail, apparently -O option=value means set
2918 option to the specified value. This form uses long names. We need to handle
2919 -O option=value and -Ooption=value. */
2920
2921 case 'O':
2922 if (*argrest == 0)
2923 {
2924 if (++i >= argc)
2925 {
2926 fprintf(stderr, "exim: string expected after -O\n");
2927 exit(EXIT_FAILURE);
2928 }
2929 }
2930 break;
2931
2932 case 'o':
2933
2934 /* -oA: Set an argument for the bi command (sendmail's "alternate alias
2935 file" option). */
2936
2937 if (*argrest == 'A')
2938 {
2939 alias_arg = argrest + 1;
2940 if (alias_arg[0] == 0)
2941 {
2942 if (i+1 < argc) alias_arg = argv[++i]; else
2943 {
2944 fprintf(stderr, "exim: string expected after -oA\n");
2945 exit(EXIT_FAILURE);
2946 }
2947 }
2948 }
2949
2950 /* -oB: Set a connection message max value for remote deliveries */
2951
2952 else if (*argrest == 'B')
2953 {
2954 uschar *p = argrest + 1;
2955 if (p[0] == 0)
2956 {
2957 if (i+1 < argc && isdigit((argv[i+1][0]))) p = argv[++i]; else
2958 {
2959 connection_max_messages = 1;
2960 p = NULL;
2961 }
2962 }
2963
2964 if (p != NULL)
2965 {
2966 if (!isdigit(*p))
2967 {
2968 fprintf(stderr, "exim: number expected after -oB\n");
2969 exit(EXIT_FAILURE);
2970 }
2971 connection_max_messages = Uatoi(p);
2972 }
2973 }
2974
2975 /* -odb: background delivery */
2976
2977 else if (Ustrcmp(argrest, "db") == 0)
2978 {
2979 synchronous_delivery = FALSE;
2980 arg_queue_only = FALSE;
2981 queue_only_set = TRUE;
2982 }
2983
2984 /* -odf: foreground delivery (smail-compatible option); same effect as
2985 -odi: interactive (synchronous) delivery (sendmail-compatible option)
2986 */
2987
2988 else if (Ustrcmp(argrest, "df") == 0 || Ustrcmp(argrest, "di") == 0)
2989 {
2990 synchronous_delivery = TRUE;
2991 arg_queue_only = FALSE;
2992 queue_only_set = TRUE;
2993 }
2994
2995 /* -odq: queue only */
2996
2997 else if (Ustrcmp(argrest, "dq") == 0)
2998 {
2999 synchronous_delivery = FALSE;
3000 arg_queue_only = TRUE;
3001 queue_only_set = TRUE;
3002 }
3003
3004 /* -odqs: queue SMTP only - do local deliveries and remote routing,
3005 but no remote delivery */
3006
3007 else if (Ustrcmp(argrest, "dqs") == 0)
3008 {
3009 queue_smtp = TRUE;
3010 arg_queue_only = FALSE;
3011 queue_only_set = TRUE;
3012 }
3013
3014 /* -oex: Sendmail error flags. As these are also accepted without the
3015 leading -o prefix, for compatibility with vacation and other callers,
3016 they are handled with -e above. */
3017
3018 /* -oi: Set flag so dot doesn't end non-SMTP input (same as -i)
3019 -oitrue: Another sendmail syntax for the same */
3020
3021 else if (Ustrcmp(argrest, "i") == 0 ||
3022 Ustrcmp(argrest, "itrue") == 0)
3023 dot_ends = FALSE;
3024
3025 /* -oM*: Set various characteristics for an incoming message; actually
3026 acted on for trusted callers only. */
3027
3028 else if (*argrest == 'M')
3029 {
3030 if (i+1 >= argc)
3031 {
3032 fprintf(stderr, "exim: data expected after -o%s\n", argrest);
3033 exit(EXIT_FAILURE);
3034 }
3035
3036 /* -oMa: Set sender host address */
3037
3038 if (Ustrcmp(argrest, "Ma") == 0) sender_host_address = argv[++i];
3039
3040 /* -oMaa: Set authenticator name */
3041
3042 else if (Ustrcmp(argrest, "Maa") == 0)
3043 sender_host_authenticated = argv[++i];
3044
3045 /* -oMas: setting authenticated sender */
3046
3047 else if (Ustrcmp(argrest, "Mas") == 0) authenticated_sender = argv[++i];
3048
3049 /* -oMai: setting authenticated id */
3050
3051 else if (Ustrcmp(argrest, "Mai") == 0) authenticated_id = argv[++i];
3052
3053 /* -oMi: Set incoming interface address */
3054
3055 else if (Ustrcmp(argrest, "Mi") == 0) interface_address = argv[++i];
3056
3057 /* -oMm: Message reference */
3058
3059 else if (Ustrcmp(argrest, "Mm") == 0)
3060 {
3061 if (!mac_ismsgid(argv[i+1]))
3062 {
3063 fprintf(stderr,"-oMm must be a valid message ID\n");
3064 exit(EXIT_FAILURE);
3065 }
3066 if (!trusted_config)
3067 {
3068 fprintf(stderr,"-oMm must be called by a trusted user/config\n");
3069 exit(EXIT_FAILURE);
3070 }
3071 message_reference = argv[++i];
3072 }
3073
3074 /* -oMr: Received protocol */
3075
3076 else if (Ustrcmp(argrest, "Mr") == 0) received_protocol = argv[++i];
3077
3078 /* -oMs: Set sender host name */
3079
3080 else if (Ustrcmp(argrest, "Ms") == 0) sender_host_name = argv[++i];
3081
3082 /* -oMt: Set sender ident */
3083
3084 else if (Ustrcmp(argrest, "Mt") == 0)
3085 {
3086 sender_ident_set = TRUE;
3087 sender_ident = argv[++i];
3088 }
3089
3090 /* Else a bad argument */
3091
3092 else
3093 {
3094 badarg = TRUE;
3095 break;
3096 }
3097 }
3098
3099 /* -om: Me-too flag for aliases. Exim always does this. Some programs
3100 seem to call this as -m (undocumented), so that is also accepted (see
3101 above). */
3102
3103 else if (Ustrcmp(argrest, "m") == 0) {}
3104
3105 /* -oo: An ancient flag for old-style addresses which still seems to
3106 crop up in some calls (see in SCO). */
3107
3108 else if (Ustrcmp(argrest, "o") == 0) {}
3109
3110 /* -oP <name>: set pid file path for daemon */
3111
3112 else if (Ustrcmp(argrest, "P") == 0)
3113 override_pid_file_path = argv[++i];
3114
3115 /* -or <n>: set timeout for non-SMTP acceptance
3116 -os <n>: set timeout for SMTP acceptance */
3117
3118 else if (*argrest == 'r' || *argrest == 's')
3119 {
3120 int *tp = (*argrest == 'r')?
3121 &arg_receive_timeout : &arg_smtp_receive_timeout;
3122 if (argrest[1] == 0)
3123 {
3124 if (i+1 < argc) *tp= readconf_readtime(argv[++i], 0, FALSE);
3125 }
3126 else *tp = readconf_readtime(argrest + 1, 0, FALSE);
3127 if (*tp < 0)
3128 {
3129 fprintf(stderr, "exim: bad time value %s: abandoned\n", argv[i]);
3130 exit(EXIT_FAILURE);
3131 }
3132 }
3133
3134 /* -oX <list>: Override local_interfaces and/or default daemon ports */
3135
3136 else if (Ustrcmp(argrest, "X") == 0)
3137 override_local_interfaces = argv[++i];
3138
3139 /* Unknown -o argument */
3140
3141 else badarg = TRUE;
3142 break;
3143
3144
3145 /* -ps: force Perl startup; -pd force delayed Perl startup */
3146
3147 case 'p':
3148 #ifdef EXIM_PERL
3149 if (*argrest == 's' && argrest[1] == 0)
3150 {
3151 perl_start_option = 1;
3152 break;
3153 }
3154 if (*argrest == 'd' && argrest[1] == 0)
3155 {
3156 perl_start_option = -1;
3157 break;
3158 }
3159 #endif
3160
3161 /* -panythingelse is taken as the Sendmail-compatible argument -prval:sval,
3162 which sets the host protocol and host name */
3163
3164 if (*argrest == 0)
3165 {
3166 if (i+1 < argc) argrest = argv[++i]; else
3167 { badarg = TRUE; break; }
3168 }
3169
3170 if (*argrest != 0)
3171 {
3172 uschar *hn = Ustrchr(argrest, ':');
3173 if (hn == NULL)
3174 {
3175 received_protocol = argrest;
3176 }
3177 else
3178 {
3179 received_protocol = string_copyn(argrest, hn - argrest);
3180 sender_host_name = hn + 1;
3181 }
3182 }
3183 break;
3184
3185
3186 case 'q':
3187 receiving_message = FALSE;
3188 if (queue_interval >= 0)
3189 {
3190 fprintf(stderr, "exim: -q specified more than once\n");
3191 exit(EXIT_FAILURE);
3192 }
3193
3194 /* -qq...: Do queue runs in a 2-stage manner */
3195
3196 if (*argrest == 'q')
3197 {
3198 queue_2stage = TRUE;
3199 argrest++;
3200 }
3201
3202 /* -qi...: Do only first (initial) deliveries */
3203
3204 if (*argrest == 'i')
3205 {
3206 queue_run_first_delivery = TRUE;
3207 argrest++;
3208 }
3209
3210 /* -qf...: Run the queue, forcing deliveries
3211 -qff..: Ditto, forcing thawing as well */
3212
3213 if (*argrest == 'f')
3214 {
3215 queue_run_force = TRUE;
3216 if (*(++argrest) == 'f')
3217 {
3218 deliver_force_thaw = TRUE;
3219 argrest++;
3220 }
3221 }
3222
3223 /* -q[f][f]l...: Run the queue only on local deliveries */
3224
3225 if (*argrest == 'l')
3226 {
3227 queue_run_local = TRUE;
3228 argrest++;
3229 }
3230
3231 /* -q[f][f][l]: Run the queue, optionally forced, optionally local only,
3232 optionally starting from a given message id. */
3233
3234 if (*argrest == 0 &&
3235 (i + 1 >= argc || argv[i+1][0] == '-' || mac_ismsgid(argv[i+1])))
3236 {
3237 queue_interval = 0;
3238 if (i+1 < argc && mac_ismsgid(argv[i+1]))
3239 start_queue_run_id = argv[++i];
3240 if (i+1 < argc && mac_ismsgid(argv[i+1]))
3241 stop_queue_run_id = argv[++i];
3242 }
3243
3244 /* -q[f][f][l]<n>: Run the queue at regular intervals, optionally forced,
3245 optionally local only. */
3246
3247 else
3248 {
3249 if (*argrest != 0)
3250 queue_interval = readconf_readtime(argrest, 0, FALSE);
3251 else
3252 queue_interval = readconf_readtime(argv[++i], 0, FALSE);
3253 if (queue_interval <= 0)
3254 {
3255 fprintf(stderr, "exim: bad time value %s: abandoned\n", argv[i]);
3256 exit(EXIT_FAILURE);
3257 }
3258 }
3259 break;
3260
3261
3262 case 'R': /* Synonymous with -qR... */
3263 receiving_message = FALSE;
3264
3265 /* -Rf: As -R (below) but force all deliveries,
3266 -Rff: Ditto, but also thaw all frozen messages,
3267 -Rr: String is regex
3268 -Rrf: Regex and force
3269 -Rrff: Regex and force and thaw
3270
3271 in all cases provided there are no further characters in this
3272 argument. */
3273
3274 if (*argrest != 0)
3275 {
3276 int i;
3277 for (i = 0; i < sizeof(rsopts)/sizeof(uschar *); i++)
3278 {
3279 if (Ustrcmp(argrest, rsopts[i]) == 0)
3280 {
3281 if (i != 2) queue_run_force = TRUE;
3282 if (i >= 2) deliver_selectstring_regex = TRUE;
3283 if (i == 1 || i == 4) deliver_force_thaw = TRUE;
3284 argrest += Ustrlen(rsopts[i]);
3285 }
3286 }
3287 }
3288
3289 /* -R: Set string to match in addresses for forced queue run to
3290 pick out particular messages. */
3291
3292 if (*argrest == 0)
3293 {
3294 if (i+1 < argc) deliver_selectstring = argv[++i]; else
3295 {
3296 fprintf(stderr, "exim: string expected after -R\n");
3297 exit(EXIT_FAILURE);
3298 }
3299 }
3300 else deliver_selectstring = argrest;
3301 break;
3302
3303
3304 /* -r: an obsolete synonym for -f (see above) */
3305
3306
3307 /* -S: Like -R but works on sender. */
3308
3309 case 'S': /* Synonymous with -qS... */
3310 receiving_message = FALSE;
3311
3312 /* -Sf: As -S (below) but force all deliveries,
3313 -Sff: Ditto, but also thaw all frozen messages,
3314 -Sr: String is regex
3315 -Srf: Regex and force
3316 -Srff: Regex and force and thaw
3317
3318 in all cases provided there are no further characters in this
3319 argument. */
3320
3321 if (*argrest != 0)
3322 {
3323 int i;
3324 for (i = 0; i < sizeof(rsopts)/sizeof(uschar *); i++)
3325 {
3326 if (Ustrcmp(argrest, rsopts[i]) == 0)
3327 {
3328 if (i != 2) queue_run_force = TRUE;
3329 if (i >= 2) deliver_selectstring_sender_regex = TRUE;
3330 if (i == 1 || i == 4) deliver_force_thaw = TRUE;
3331 argrest += Ustrlen(rsopts[i]);
3332 }
3333 }
3334 }
3335
3336 /* -S: Set string to match in addresses for forced queue run to
3337 pick out particular messages. */
3338
3339 if (*argrest == 0)
3340 {
3341 if (i+1 < argc) deliver_selectstring_sender = argv[++i]; else
3342 {
3343 fprintf(stderr, "exim: string expected after -S\n");
3344 exit(EXIT_FAILURE);
3345 }
3346 }
3347 else deliver_selectstring_sender = argrest;
3348 break;
3349
3350 /* -Tqt is an option that is exclusively for use by the testing suite.
3351 It is not recognized in other circumstances. It allows for the setting up
3352 of explicit "queue times" so that various warning/retry things can be
3353 tested. Otherwise variability of clock ticks etc. cause problems. */
3354
3355 case 'T':
3356 if (running_in_test_harness && Ustrcmp(argrest, "qt") == 0)
3357 fudged_queue_times = argv[++i];
3358 else badarg = TRUE;
3359 break;
3360
3361
3362 /* -t: Set flag to extract recipients from body of message. */
3363
3364 case 't':
3365 if (*argrest == 0) extract_recipients = TRUE;
3366
3367 /* -ti: Set flag to extract recipients from body of message, and also
3368 specify that dot does not end the message. */
3369
3370 else if (Ustrcmp(argrest, "i") == 0)
3371 {
3372 extract_recipients = TRUE;
3373 dot_ends = FALSE;
3374 }
3375
3376 /* -tls-on-connect: don't wait for STARTTLS (for old clients) */
3377
3378 #ifdef SUPPORT_TLS
3379 else if (Ustrcmp(argrest, "ls-on-connect") == 0) tls_in.on_connect = TRUE;
3380 #endif
3381
3382 else badarg = TRUE;
3383 break;
3384
3385
3386 /* -U: This means "initial user submission" in sendmail, apparently. The
3387 doc claims that in future sendmail may refuse syntactically invalid
3388 messages instead of fixing them. For the moment, we just ignore it. */
3389
3390 case 'U':
3391 break;
3392
3393
3394 /* -v: verify things - this is a very low-level debugging */
3395
3396 case 'v':
3397 if (*argrest == 0)
3398 {
3399 debug_selector |= D_v;
3400 debug_file = stderr;
3401 }
3402 else badarg = TRUE;
3403 break;
3404
3405
3406 /* -x: AIX uses this to indicate some fancy 8-bit character stuff:
3407
3408 The -x flag tells the sendmail command that mail from a local
3409 mail program has National Language Support (NLS) extended characters
3410 in the body of the mail item. The sendmail command can send mail with
3411 extended NLS characters across networks that normally corrupts these
3412 8-bit characters.
3413
3414 As Exim is 8-bit clean, it just ignores this flag. */
3415
3416 case 'x':
3417 if (*argrest != 0) badarg = TRUE;
3418 break;
3419
3420 /* -X: in sendmail: takes one parameter, logfile, and sends debugging
3421 logs to that file. We swallow the parameter and otherwise ignore it. */
3422
3423 case 'X':
3424 if (*argrest == '\0')
3425 if (++i >= argc)
3426 {
3427 fprintf(stderr, "exim: string expected after -X\n");
3428 exit(EXIT_FAILURE);
3429 }
3430 break;
3431
3432 case 'z':
3433 if (*argrest == '\0')
3434 if (++i < argc) log_oneline = argv[i]; else
3435 {
3436 fprintf(stderr, "exim: file name expected after %s\n", argv[i-1]);
3437 exit(EXIT_FAILURE);
3438 }
3439 break;
3440
3441 /* All other initial characters are errors */
3442
3443 default:
3444 badarg = TRUE;
3445 break;
3446 } /* End of high-level switch statement */
3447
3448 /* Failed to recognize the option, or syntax error */
3449
3450 if (badarg)
3451 {
3452 fprintf(stderr, "exim abandoned: unknown, malformed, or incomplete "
3453 "option %s\n", arg);
3454 exit(EXIT_FAILURE);
3455 }
3456 }
3457
3458
3459 /* If -R or -S have been specified without -q, assume a single queue run. */
3460
3461 if ((deliver_selectstring != NULL || deliver_selectstring_sender != NULL) &&
3462 queue_interval < 0) queue_interval = 0;
3463
3464
3465 END_ARG:
3466 /* If usage_wanted is set we call the usage function - which never returns */
3467 if (usage_wanted) exim_usage(called_as);
3468
3469 /* Arguments have been processed. Check for incompatibilities. */
3470 if ((
3471 (smtp_input || extract_recipients || recipients_arg < argc) &&
3472 (daemon_listen || queue_interval >= 0 || bi_option ||
3473 test_retry_arg >= 0 || test_rewrite_arg >= 0 ||
3474 filter_test != FTEST_NONE || (msg_action_arg > 0 && !one_msg_action))
3475 ) ||
3476 (
3477 msg_action_arg > 0 &&
3478 (daemon_listen || queue_interval >= 0 || list_options ||
3479 (checking && msg_action != MSG_LOAD) ||
3480 bi_option || test_retry_arg >= 0 || test_rewrite_arg >= 0)
3481 ) ||
3482 (
3483 (daemon_listen || queue_interval >= 0) &&
3484 (sender_address != NULL || list_options || list_queue || checking ||
3485 bi_option)
3486 ) ||
3487 (
3488 daemon_listen && queue_interval == 0
3489 ) ||
3490 (
3491 inetd_wait_mode && queue_interval >= 0
3492 ) ||
3493 (
3494 list_options &&
3495 (checking || smtp_input || extract_recipients ||
3496 filter_test != FTEST_NONE || bi_option)
3497 ) ||
3498 (
3499 verify_address_mode &&
3500 (address_test_mode || smtp_input || extract_recipients ||
3501 filter_test != FTEST_NONE || bi_option)
3502 ) ||
3503 (
3504 address_test_mode && (smtp_input || extract_recipients ||
3505 filter_test != FTEST_NONE || bi_option)
3506 ) ||
3507 (
3508 smtp_input && (sender_address != NULL || filter_test != FTEST_NONE ||
3509 extract_recipients)
3510 ) ||
3511 (
3512 deliver_selectstring != NULL && queue_interval < 0
3513 ) ||
3514 (
3515 msg_action == MSG_LOAD &&
3516 (!expansion_test || expansion_test_message != NULL)
3517 )
3518 )
3519 {
3520 fprintf(stderr, "exim: incompatible command-line options or arguments\n");
3521 exit(EXIT_FAILURE);
3522 }
3523
3524 /* If debugging is set up, set the file and the file descriptor to pass on to
3525 child processes. It should, of course, be 2 for stderr. Also, force the daemon
3526 to run in the foreground. */
3527
3528 if (debug_selector != 0)
3529 {
3530 debug_file = stderr;
3531 debug_fd = fileno(debug_file);
3532 background_daemon = FALSE;
3533 if (running_in_test_harness) millisleep(100); /* lets caller finish */
3534 if (debug_selector != D_v) /* -v only doesn't show this */
3535 {
3536 debug_printf("Exim version %s uid=%ld gid=%ld pid=%d D=%x\n",
3537 version_string, (long int)real_uid, (long int)real_gid, (int)getpid(),
3538 debug_selector);
3539 if (!version_printed)
3540 show_whats_supported(stderr);
3541 }