testcase
[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 /* yield can only be NULL if ss==p */
1276 if (ss == p || yield[ptr-1] != '\\')
1277 {
1278 if (yield) yield[ptr] = 0;
1279 break;
1280 }
1281 yield[--ptr] = 0;
1282 }
1283
1284 if (yield == NULL) printf("\n");
1285 return yield;
1286 }
1287
1288
1289
1290 /*************************************************
1291 * Output usage information for the program *
1292 *************************************************/
1293
1294 /* This function is called when there are no recipients
1295 or a specific --help argument was added.
1296
1297 Arguments:
1298 progname information on what name we were called by
1299
1300 Returns: DOES NOT RETURN
1301 */
1302
1303 static void
1304 exim_usage(uschar *progname)
1305 {
1306
1307 /* Handle specific program invocation varients */
1308 if (Ustrcmp(progname, US"-mailq") == 0)
1309 {
1310 fprintf(stderr,
1311 "mailq - list the contents of the mail queue\n\n"
1312 "For a list of options, see the Exim documentation.\n");
1313 exit(EXIT_FAILURE);
1314 }
1315
1316 /* Generic usage - we output this whatever happens */
1317 fprintf(stderr,
1318 "Exim is a Mail Transfer Agent. It is normally called by Mail User Agents,\n"
1319 "not directly from a shell command line. Options and/or arguments control\n"
1320 "what it does when called. For a list of options, see the Exim documentation.\n");
1321
1322 exit(EXIT_FAILURE);
1323 }
1324
1325
1326
1327 /*************************************************
1328 * Validate that the macros given are okay *
1329 *************************************************/
1330
1331 /* Typically, Exim will drop privileges if macros are supplied. In some
1332 cases, we want to not do so.
1333
1334 Arguments: none (macros is a global)
1335 Returns: true if trusted, false otherwise
1336 */
1337
1338 static BOOL
1339 macros_trusted(void)
1340 {
1341 #ifdef WHITELIST_D_MACROS
1342 macro_item *m;
1343 uschar *whitelisted, *end, *p, **whites, **w;
1344 int white_count, i, n;
1345 size_t len;
1346 BOOL prev_char_item, found;
1347 #endif
1348
1349 if (macros == NULL)
1350 return TRUE;
1351 #ifndef WHITELIST_D_MACROS
1352 return FALSE;
1353 #else
1354
1355 /* We only trust -D overrides for some invoking users:
1356 root, the exim run-time user, the optional config owner user.
1357 I don't know why config-owner would be needed, but since they can own the
1358 config files anyway, there's no security risk to letting them override -D. */
1359 if ( ! ((real_uid == root_uid)
1360 || (real_uid == exim_uid)
1361 #ifdef CONFIGURE_OWNER
1362 || (real_uid == config_uid)
1363 #endif
1364 ))
1365 {
1366 debug_printf("macros_trusted rejecting macros for uid %d\n", (int) real_uid);
1367 return FALSE;
1368 }
1369
1370 /* Get a list of macros which are whitelisted */
1371 whitelisted = string_copy_malloc(US WHITELIST_D_MACROS);
1372 prev_char_item = FALSE;
1373 white_count = 0;
1374 for (p = whitelisted; *p != '\0'; ++p)
1375 {
1376 if (*p == ':' || isspace(*p))
1377 {
1378 *p = '\0';
1379 if (prev_char_item)
1380 ++white_count;
1381 prev_char_item = FALSE;
1382 continue;
1383 }
1384 if (!prev_char_item)
1385 prev_char_item = TRUE;
1386 }
1387 end = p;
1388 if (prev_char_item)
1389 ++white_count;
1390 if (!white_count)
1391 return FALSE;
1392 whites = store_malloc(sizeof(uschar *) * (white_count+1));
1393 for (p = whitelisted, i = 0; (p != end) && (i < white_count); ++p)
1394 {
1395 if (*p != '\0')
1396 {
1397 whites[i++] = p;
1398 if (i == white_count)
1399 break;
1400 while (*p != '\0' && p < end)
1401 ++p;
1402 }
1403 }
1404 whites[i] = NULL;
1405
1406 /* The list of macros should be very short. Accept the N*M complexity. */
1407 for (m = macros; m != NULL; m = m->next)
1408 {
1409 found = FALSE;
1410 for (w = whites; *w; ++w)
1411 if (Ustrcmp(*w, m->name) == 0)
1412 {
1413 found = TRUE;
1414 break;
1415 }
1416 if (!found)
1417 return FALSE;
1418 if (m->replacement == NULL)
1419 continue;
1420 len = Ustrlen(m->replacement);
1421 if (len == 0)
1422 continue;
1423 n = pcre_exec(regex_whitelisted_macro, NULL, CS m->replacement, len,
1424 0, PCRE_EOPT, NULL, 0);
1425 if (n < 0)
1426 {
1427 if (n != PCRE_ERROR_NOMATCH)
1428 debug_printf("macros_trusted checking %s returned %d\n", m->name, n);
1429 return FALSE;
1430 }
1431 }
1432 DEBUG(D_any) debug_printf("macros_trusted overridden to true by whitelisting\n");
1433 return TRUE;
1434 #endif
1435 }
1436
1437
1438 /*************************************************
1439 * Entry point and high-level code *
1440 *************************************************/
1441
1442 /* Entry point for the Exim mailer. Analyse the arguments and arrange to take
1443 the appropriate action. All the necessary functions are present in the one
1444 binary. I originally thought one should split it up, but it turns out that so
1445 much of the apparatus is needed in each chunk that one might as well just have
1446 it all available all the time, which then makes the coding easier as well.
1447
1448 Arguments:
1449 argc count of entries in argv
1450 argv argument strings, with argv[0] being the program name
1451
1452 Returns: EXIT_SUCCESS if terminated successfully
1453 EXIT_FAILURE otherwise, except when a message has been sent
1454 to the sender, and -oee was given
1455 */
1456
1457 int
1458 main(int argc, char **cargv)
1459 {
1460 uschar **argv = USS cargv;
1461 int arg_receive_timeout = -1;
1462 int arg_smtp_receive_timeout = -1;
1463 int arg_error_handling = error_handling;
1464 int filter_sfd = -1;
1465 int filter_ufd = -1;
1466 int group_count;
1467 int i, rv;
1468 int list_queue_option = 0;
1469 int msg_action = 0;
1470 int msg_action_arg = -1;
1471 int namelen = (argv[0] == NULL)? 0 : Ustrlen(argv[0]);
1472 int queue_only_reason = 0;
1473 #ifdef EXIM_PERL
1474 int perl_start_option = 0;
1475 #endif
1476 int recipients_arg = argc;
1477 int sender_address_domain = 0;
1478 int test_retry_arg = -1;
1479 int test_rewrite_arg = -1;
1480 BOOL arg_queue_only = FALSE;
1481 BOOL bi_option = FALSE;
1482 BOOL checking = FALSE;
1483 BOOL count_queue = FALSE;
1484 BOOL expansion_test = FALSE;
1485 BOOL extract_recipients = FALSE;
1486 BOOL flag_G = FALSE;
1487 BOOL flag_n = FALSE;
1488 BOOL forced_delivery = FALSE;
1489 BOOL f_end_dot = FALSE;
1490 BOOL deliver_give_up = FALSE;
1491 BOOL list_queue = FALSE;
1492 BOOL list_options = FALSE;
1493 BOOL list_config = FALSE;
1494 BOOL local_queue_only;
1495 BOOL more = TRUE;
1496 BOOL one_msg_action = FALSE;
1497 BOOL queue_only_set = FALSE;
1498 BOOL receiving_message = TRUE;
1499 BOOL sender_ident_set = FALSE;
1500 BOOL session_local_queue_only;
1501 BOOL unprivileged;
1502 BOOL removed_privilege = FALSE;
1503 BOOL usage_wanted = FALSE;
1504 BOOL verify_address_mode = FALSE;
1505 BOOL verify_as_sender = FALSE;
1506 BOOL version_printed = FALSE;
1507 uschar *alias_arg = NULL;
1508 uschar *called_as = US"";
1509 uschar *cmdline_syslog_name = NULL;
1510 uschar *start_queue_run_id = NULL;
1511 uschar *stop_queue_run_id = NULL;
1512 uschar *expansion_test_message = NULL;
1513 uschar *ftest_domain = NULL;
1514 uschar *ftest_localpart = NULL;
1515 uschar *ftest_prefix = NULL;
1516 uschar *ftest_suffix = NULL;
1517 uschar *log_oneline = NULL;
1518 uschar *malware_test_file = NULL;
1519 uschar *real_sender_address;
1520 uschar *originator_home = US"/";
1521 size_t sz;
1522 void *reset_point;
1523
1524 struct passwd *pw;
1525 struct stat statbuf;
1526 pid_t passed_qr_pid = (pid_t)0;
1527 int passed_qr_pipe = -1;
1528 gid_t group_list[NGROUPS_MAX];
1529
1530 /* For the -bI: flag */
1531 enum commandline_info info_flag = CMDINFO_NONE;
1532 BOOL info_stdout = FALSE;
1533
1534 /* Possible options for -R and -S */
1535
1536 static uschar *rsopts[] = { US"f", US"ff", US"r", US"rf", US"rff" };
1537
1538 /* Need to define this in case we need to change the environment in order
1539 to get rid of a bogus time zone. We have to make it char rather than uschar
1540 because some OS define it in /usr/include/unistd.h. */
1541
1542 extern char **environ;
1543
1544 /* If the Exim user and/or group and/or the configuration file owner/group were
1545 defined by ref:name at build time, we must now find the actual uid/gid values.
1546 This is a feature to make the lives of binary distributors easier. */
1547
1548 #ifdef EXIM_USERNAME
1549 if (route_finduser(US EXIM_USERNAME, &pw, &exim_uid))
1550 {
1551 if (exim_uid == 0)
1552 {
1553 fprintf(stderr, "exim: refusing to run with uid 0 for \"%s\"\n",
1554 EXIM_USERNAME);
1555 exit(EXIT_FAILURE);
1556 }
1557 /* If ref:name uses a number as the name, route_finduser() returns
1558 TRUE with exim_uid set and pw coerced to NULL. */
1559 if (pw)
1560 exim_gid = pw->pw_gid;
1561 #ifndef EXIM_GROUPNAME
1562 else
1563 {
1564 fprintf(stderr,
1565 "exim: ref:name should specify a usercode, not a group.\n"
1566 "exim: can't let you get away with it unless you also specify a group.\n");
1567 exit(EXIT_FAILURE);
1568 }
1569 #endif
1570 }
1571 else
1572 {
1573 fprintf(stderr, "exim: failed to find uid for user name \"%s\"\n",
1574 EXIM_USERNAME);
1575 exit(EXIT_FAILURE);
1576 }
1577 #endif
1578
1579 #ifdef EXIM_GROUPNAME
1580 if (!route_findgroup(US EXIM_GROUPNAME, &exim_gid))
1581 {
1582 fprintf(stderr, "exim: failed to find gid for group name \"%s\"\n",
1583 EXIM_GROUPNAME);
1584 exit(EXIT_FAILURE);
1585 }
1586 #endif
1587
1588 #ifdef CONFIGURE_OWNERNAME
1589 if (!route_finduser(US CONFIGURE_OWNERNAME, NULL, &config_uid))
1590 {
1591 fprintf(stderr, "exim: failed to find uid for user name \"%s\"\n",
1592 CONFIGURE_OWNERNAME);
1593 exit(EXIT_FAILURE);
1594 }
1595 #endif
1596
1597 /* We default the system_filter_user to be the Exim run-time user, as a
1598 sane non-root value. */
1599 system_filter_uid = exim_uid;
1600
1601 #ifdef CONFIGURE_GROUPNAME
1602 if (!route_findgroup(US CONFIGURE_GROUPNAME, &config_gid))
1603 {
1604 fprintf(stderr, "exim: failed to find gid for group name \"%s\"\n",
1605 CONFIGURE_GROUPNAME);
1606 exit(EXIT_FAILURE);
1607 }
1608 #endif
1609
1610 /* In the Cygwin environment, some initialization used to need doing.
1611 It was fudged in by means of this macro; now no longer but we'll leave
1612 it in case of others. */
1613
1614 #ifdef OS_INIT
1615 OS_INIT
1616 #endif
1617
1618 /* Check a field which is patched when we are running Exim within its
1619 testing harness; do a fast initial check, and then the whole thing. */
1620
1621 running_in_test_harness =
1622 *running_status == '<' && Ustrcmp(running_status, "<<<testing>>>") == 0;
1623
1624 /* The C standard says that the equivalent of setlocale(LC_ALL, "C") is obeyed
1625 at the start of a program; however, it seems that some environments do not
1626 follow this. A "strange" locale can affect the formatting of timestamps, so we
1627 make quite sure. */
1628
1629 setlocale(LC_ALL, "C");
1630
1631 /* Set up the default handler for timing using alarm(). */
1632
1633 os_non_restarting_signal(SIGALRM, sigalrm_handler);
1634
1635 /* Ensure we have a buffer for constructing log entries. Use malloc directly,
1636 because store_malloc writes a log entry on failure. */
1637
1638 log_buffer = (uschar *)malloc(LOG_BUFFER_SIZE);
1639 if (log_buffer == NULL)
1640 {
1641 fprintf(stderr, "exim: failed to get store for log buffer\n");
1642 exit(EXIT_FAILURE);
1643 }
1644
1645 /* Initialize the default log options. */
1646
1647 bits_set(log_selector, log_selector_size, log_default);
1648
1649 /* Set log_stderr to stderr, provided that stderr exists. This gets reset to
1650 NULL when the daemon is run and the file is closed. We have to use this
1651 indirection, because some systems don't allow writing to the variable "stderr".
1652 */
1653
1654 if (fstat(fileno(stderr), &statbuf) >= 0) log_stderr = stderr;
1655
1656 /* Arrange for the PCRE regex library to use our store functions. Note that
1657 the normal calls are actually macros that add additional arguments for
1658 debugging purposes so we have to assign specially constructed functions here.
1659 The default is to use store in the stacking pool, but this is overridden in the
1660 regex_must_compile() function. */
1661
1662 pcre_malloc = function_store_get;
1663 pcre_free = function_dummy_free;
1664
1665 /* Ensure there is a big buffer for temporary use in several places. It is put
1666 in malloc store so that it can be freed for enlargement if necessary. */
1667
1668 big_buffer = store_malloc(big_buffer_size);
1669
1670 /* Set up the handler for the data request signal, and set the initial
1671 descriptive text. */
1672
1673 set_process_info("initializing");
1674 os_restarting_signal(SIGUSR1, usr1_handler);
1675
1676 /* SIGHUP is used to get the daemon to reconfigure. It gets set as appropriate
1677 in the daemon code. For the rest of Exim's uses, we ignore it. */
1678
1679 signal(SIGHUP, SIG_IGN);
1680
1681 /* We don't want to die on pipe errors as the code is written to handle
1682 the write error instead. */
1683
1684 signal(SIGPIPE, SIG_IGN);
1685
1686 /* Under some circumstance on some OS, Exim can get called with SIGCHLD
1687 set to SIG_IGN. This causes subprocesses that complete before the parent
1688 process waits for them not to hang around, so when Exim calls wait(), nothing
1689 is there. The wait() code has been made robust against this, but let's ensure
1690 that SIGCHLD is set to SIG_DFL, because it's tidier to wait and get a process
1691 ending status. We use sigaction rather than plain signal() on those OS where
1692 SA_NOCLDWAIT exists, because we want to be sure it is turned off. (There was a
1693 problem on AIX with this.) */
1694
1695 #ifdef SA_NOCLDWAIT
1696 {
1697 struct sigaction act;
1698 act.sa_handler = SIG_DFL;
1699 sigemptyset(&(act.sa_mask));
1700 act.sa_flags = 0;
1701 sigaction(SIGCHLD, &act, NULL);
1702 }
1703 #else
1704 signal(SIGCHLD, SIG_DFL);
1705 #endif
1706
1707 /* Save the arguments for use if we re-exec exim as a daemon after receiving
1708 SIGHUP. */
1709
1710 sighup_argv = argv;
1711
1712 /* Set up the version number. Set up the leading 'E' for the external form of
1713 message ids, set the pointer to the internal form, and initialize it to
1714 indicate no message being processed. */
1715
1716 version_init();
1717 message_id_option[0] = '-';
1718 message_id_external = message_id_option + 1;
1719 message_id_external[0] = 'E';
1720 message_id = message_id_external + 1;
1721 message_id[0] = 0;
1722
1723 /* Set the umask to zero so that any files Exim creates using open() are
1724 created with the modes that it specifies. NOTE: Files created with fopen() have
1725 a problem, which was not recognized till rather late (February 2006). With this
1726 umask, such files will be world writeable. (They are all content scanning files
1727 in the spool directory, which isn't world-accessible, so this is not a
1728 disaster, but it's untidy.) I don't want to change this overall setting,
1729 however, because it will interact badly with the open() calls. Instead, there's
1730 now a function called modefopen() that fiddles with the umask while calling
1731 fopen(). */
1732
1733 (void)umask(0);
1734
1735 /* Precompile the regular expression for matching a message id. Keep this in
1736 step with the code that generates ids in the accept.c module. We need to do
1737 this here, because the -M options check their arguments for syntactic validity
1738 using mac_ismsgid, which uses this. */
1739
1740 regex_ismsgid =
1741 regex_must_compile(US"^(?:[^\\W_]{6}-){2}[^\\W_]{2}$", FALSE, TRUE);
1742
1743 /* Precompile the regular expression that is used for matching an SMTP error
1744 code, possibly extended, at the start of an error message. Note that the
1745 terminating whitespace character is included. */
1746
1747 regex_smtp_code =
1748 regex_must_compile(US"^\\d\\d\\d\\s(?:\\d\\.\\d\\d?\\d?\\.\\d\\d?\\d?\\s)?",
1749 FALSE, TRUE);
1750
1751 #ifdef WHITELIST_D_MACROS
1752 /* Precompile the regular expression used to filter the content of macros
1753 given to -D for permissibility. */
1754
1755 regex_whitelisted_macro =
1756 regex_must_compile(US"^[A-Za-z0-9_/.-]*$", FALSE, TRUE);
1757 #endif
1758
1759 for (i = 0; i < REGEX_VARS; i++) regex_vars[i] = NULL;
1760
1761 /* If the program is called as "mailq" treat it as equivalent to "exim -bp";
1762 this seems to be a generally accepted convention, since one finds symbolic
1763 links called "mailq" in standard OS configurations. */
1764
1765 if ((namelen == 5 && Ustrcmp(argv[0], "mailq") == 0) ||
1766 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/mailq", 6) == 0))
1767 {
1768 list_queue = TRUE;
1769 receiving_message = FALSE;
1770 called_as = US"-mailq";
1771 }
1772
1773 /* If the program is called as "rmail" treat it as equivalent to
1774 "exim -i -oee", thus allowing UUCP messages to be input using non-SMTP mode,
1775 i.e. preventing a single dot on a line from terminating the message, and
1776 returning with zero return code, even in cases of error (provided an error
1777 message has been sent). */
1778
1779 if ((namelen == 5 && Ustrcmp(argv[0], "rmail") == 0) ||
1780 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/rmail", 6) == 0))
1781 {
1782 dot_ends = FALSE;
1783 called_as = US"-rmail";
1784 errors_sender_rc = EXIT_SUCCESS;
1785 }
1786
1787 /* If the program is called as "rsmtp" treat it as equivalent to "exim -bS";
1788 this is a smail convention. */
1789
1790 if ((namelen == 5 && Ustrcmp(argv[0], "rsmtp") == 0) ||
1791 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/rsmtp", 6) == 0))
1792 {
1793 smtp_input = smtp_batched_input = TRUE;
1794 called_as = US"-rsmtp";
1795 }
1796
1797 /* If the program is called as "runq" treat it as equivalent to "exim -q";
1798 this is a smail convention. */
1799
1800 if ((namelen == 4 && Ustrcmp(argv[0], "runq") == 0) ||
1801 (namelen > 4 && Ustrncmp(argv[0] + namelen - 5, "/runq", 5) == 0))
1802 {
1803 queue_interval = 0;
1804 receiving_message = FALSE;
1805 called_as = US"-runq";
1806 }
1807
1808 /* If the program is called as "newaliases" treat it as equivalent to
1809 "exim -bi"; this is a sendmail convention. */
1810
1811 if ((namelen == 10 && Ustrcmp(argv[0], "newaliases") == 0) ||
1812 (namelen > 10 && Ustrncmp(argv[0] + namelen - 11, "/newaliases", 11) == 0))
1813 {
1814 bi_option = TRUE;
1815 receiving_message = FALSE;
1816 called_as = US"-newaliases";
1817 }
1818
1819 /* Save the original effective uid for a couple of uses later. It should
1820 normally be root, but in some esoteric environments it may not be. */
1821
1822 original_euid = geteuid();
1823
1824 /* Get the real uid and gid. If the caller is root, force the effective uid/gid
1825 to be the same as the real ones. This makes a difference only if Exim is setuid
1826 (or setgid) to something other than root, which could be the case in some
1827 special configurations. */
1828
1829 real_uid = getuid();
1830 real_gid = getgid();
1831
1832 if (real_uid == root_uid)
1833 {
1834 rv = setgid(real_gid);
1835 if (rv)
1836 {
1837 fprintf(stderr, "exim: setgid(%ld) failed: %s\n",
1838 (long int)real_gid, strerror(errno));
1839 exit(EXIT_FAILURE);
1840 }
1841 rv = setuid(real_uid);
1842 if (rv)
1843 {
1844 fprintf(stderr, "exim: setuid(%ld) failed: %s\n",
1845 (long int)real_uid, strerror(errno));
1846 exit(EXIT_FAILURE);
1847 }
1848 }
1849
1850 /* If neither the original real uid nor the original euid was root, Exim is
1851 running in an unprivileged state. */
1852
1853 unprivileged = (real_uid != root_uid && original_euid != root_uid);
1854
1855 /* Scan the program's arguments. Some can be dealt with right away; others are
1856 simply recorded for checking and handling afterwards. Do a high-level switch
1857 on the second character (the one after '-'), to save some effort. */
1858
1859 for (i = 1; i < argc; i++)
1860 {
1861 BOOL badarg = FALSE;
1862 uschar *arg = argv[i];
1863 uschar *argrest;
1864 int switchchar;
1865
1866 /* An argument not starting with '-' is the start of a recipients list;
1867 break out of the options-scanning loop. */
1868
1869 if (arg[0] != '-')
1870 {
1871 recipients_arg = i;
1872 break;
1873 }
1874
1875 /* An option consistion of -- terminates the options */
1876
1877 if (Ustrcmp(arg, "--") == 0)
1878 {
1879 recipients_arg = i + 1;
1880 break;
1881 }
1882
1883 /* Handle flagged options */
1884
1885 switchchar = arg[1];
1886 argrest = arg+2;
1887
1888 /* Make all -ex options synonymous with -oex arguments, since that
1889 is assumed by various callers. Also make -qR options synonymous with -R
1890 options, as that seems to be required as well. Allow for -qqR too, and
1891 the same for -S options. */
1892
1893 if (Ustrncmp(arg+1, "oe", 2) == 0 ||
1894 Ustrncmp(arg+1, "qR", 2) == 0 ||
1895 Ustrncmp(arg+1, "qS", 2) == 0)
1896 {
1897 switchchar = arg[2];
1898 argrest++;
1899 }
1900 else if (Ustrncmp(arg+1, "qqR", 3) == 0 || Ustrncmp(arg+1, "qqS", 3) == 0)
1901 {
1902 switchchar = arg[3];
1903 argrest += 2;
1904 queue_2stage = TRUE;
1905 }
1906
1907 /* Make -r synonymous with -f, since it is a documented alias */
1908
1909 else if (arg[1] == 'r') switchchar = 'f';
1910
1911 /* Make -ov synonymous with -v */
1912
1913 else if (Ustrcmp(arg, "-ov") == 0)
1914 {
1915 switchchar = 'v';
1916 argrest++;
1917 }
1918
1919 /* deal with --option_aliases */
1920 else if (switchchar == '-')
1921 {
1922 if (Ustrcmp(argrest, "help") == 0)
1923 {
1924 usage_wanted = TRUE;
1925 break;
1926 }
1927 else if (Ustrcmp(argrest, "version") == 0)
1928 {
1929 switchchar = 'b';
1930 argrest = US"V";
1931 }
1932 }
1933
1934 /* High-level switch on active initial letter */
1935
1936 switch(switchchar)
1937 {
1938
1939 /* sendmail uses -Ac and -Am to control which .cf file is used;
1940 we ignore them. */
1941 case 'A':
1942 if (*argrest == '\0') { badarg = TRUE; break; }
1943 else
1944 {
1945 BOOL ignore = FALSE;
1946 switch (*argrest)
1947 {
1948 case 'c':
1949 case 'm':
1950 if (*(argrest + 1) == '\0')
1951 ignore = TRUE;
1952 break;
1953 }
1954 if (!ignore) { badarg = TRUE; break; }
1955 }
1956 break;
1957
1958 /* -Btype is a sendmail option for 7bit/8bit setting. Exim is 8-bit clean
1959 so has no need of it. */
1960
1961 case 'B':
1962 if (*argrest == 0) i++; /* Skip over the type */
1963 break;
1964
1965
1966 case 'b':
1967 receiving_message = FALSE; /* Reset TRUE for -bm, -bS, -bs below */
1968
1969 /* -bd: Run in daemon mode, awaiting SMTP connections.
1970 -bdf: Ditto, but in the foreground.
1971 */
1972
1973 if (*argrest == 'd')
1974 {
1975 daemon_listen = TRUE;
1976 if (*(++argrest) == 'f') background_daemon = FALSE;
1977 else if (*argrest != 0) { badarg = TRUE; break; }
1978 }
1979
1980 /* -be: Run in expansion test mode
1981 -bem: Ditto, but read a message from a file first
1982 */
1983
1984 else if (*argrest == 'e')
1985 {
1986 expansion_test = checking = TRUE;
1987 if (argrest[1] == 'm')
1988 {
1989 if (++i >= argc) { badarg = TRUE; break; }
1990 expansion_test_message = argv[i];
1991 argrest++;
1992 }
1993 if (argrest[1] != 0) { badarg = TRUE; break; }
1994 }
1995
1996 /* -bF: Run system filter test */
1997
1998 else if (*argrest == 'F')
1999 {
2000 filter_test |= checking = FTEST_SYSTEM;
2001 if (*(++argrest) != 0) { badarg = TRUE; break; }
2002 if (++i < argc) filter_test_sfile = argv[i]; else
2003 {
2004 fprintf(stderr, "exim: file name expected after %s\n", argv[i-1]);
2005 exit(EXIT_FAILURE);
2006 }
2007 }
2008
2009 /* -bf: Run user filter test
2010 -bfd: Set domain for filter testing
2011 -bfl: Set local part for filter testing
2012 -bfp: Set prefix for filter testing
2013 -bfs: Set suffix for filter testing
2014 */
2015
2016 else if (*argrest == 'f')
2017 {
2018 if (*(++argrest) == 0)
2019 {
2020 filter_test |= checking = FTEST_USER;
2021 if (++i < argc) filter_test_ufile = argv[i]; else
2022 {
2023 fprintf(stderr, "exim: file name expected after %s\n", argv[i-1]);
2024 exit(EXIT_FAILURE);
2025 }
2026 }
2027 else
2028 {
2029 if (++i >= argc)
2030 {
2031 fprintf(stderr, "exim: string expected after %s\n", arg);
2032 exit(EXIT_FAILURE);
2033 }
2034 if (Ustrcmp(argrest, "d") == 0) ftest_domain = argv[i];
2035 else if (Ustrcmp(argrest, "l") == 0) ftest_localpart = argv[i];
2036 else if (Ustrcmp(argrest, "p") == 0) ftest_prefix = argv[i];
2037 else if (Ustrcmp(argrest, "s") == 0) ftest_suffix = argv[i];
2038 else { badarg = TRUE; break; }
2039 }
2040 }
2041
2042 /* -bh: Host checking - an IP address must follow. */
2043
2044 else if (Ustrcmp(argrest, "h") == 0 || Ustrcmp(argrest, "hc") == 0)
2045 {
2046 if (++i >= argc) { badarg = TRUE; break; }
2047 sender_host_address = argv[i];
2048 host_checking = checking = log_testing_mode = TRUE;
2049 host_checking_callout = argrest[1] == 'c';
2050 }
2051
2052 /* -bi: This option is used by sendmail to initialize *the* alias file,
2053 though it has the -oA option to specify a different file. Exim has no
2054 concept of *the* alias file, but since Sun's YP make script calls
2055 sendmail this way, some support must be provided. */
2056
2057 else if (Ustrcmp(argrest, "i") == 0) bi_option = TRUE;
2058
2059 /* -bI: provide information, of the type to follow after a colon.
2060 This is an Exim flag. */
2061
2062 else if (argrest[0] == 'I' && Ustrlen(argrest) >= 2 && argrest[1] == ':')
2063 {
2064 uschar *p = &argrest[2];
2065 info_flag = CMDINFO_HELP;
2066 if (Ustrlen(p))
2067 {
2068 if (strcmpic(p, CUS"sieve") == 0)
2069 {
2070 info_flag = CMDINFO_SIEVE;
2071 info_stdout = TRUE;
2072 }
2073 else if (strcmpic(p, CUS"dscp") == 0)
2074 {
2075 info_flag = CMDINFO_DSCP;
2076 info_stdout = TRUE;
2077 }
2078 else if (strcmpic(p, CUS"help") == 0)
2079 {
2080 info_stdout = TRUE;
2081 }
2082 }
2083 }
2084
2085 /* -bm: Accept and deliver message - the default option. Reinstate
2086 receiving_message, which got turned off for all -b options. */
2087
2088 else if (Ustrcmp(argrest, "m") == 0) receiving_message = TRUE;
2089
2090 /* -bmalware: test the filename given for malware */
2091
2092 else if (Ustrcmp(argrest, "malware") == 0)
2093 {
2094 if (++i >= argc) { badarg = TRUE; break; }
2095 checking = TRUE;
2096 malware_test_file = argv[i];
2097 }
2098
2099 /* -bnq: For locally originating messages, do not qualify unqualified
2100 addresses. In the envelope, this causes errors; in header lines they
2101 just get left. */
2102
2103 else if (Ustrcmp(argrest, "nq") == 0)
2104 {
2105 allow_unqualified_sender = FALSE;
2106 allow_unqualified_recipient = FALSE;
2107 }
2108
2109 /* -bpxx: List the contents of the mail queue, in various forms. If
2110 the option is -bpc, just a queue count is needed. Otherwise, if the
2111 first letter after p is r, then order is random. */
2112
2113 else if (*argrest == 'p')
2114 {
2115 if (*(++argrest) == 'c')
2116 {
2117 count_queue = TRUE;
2118 if (*(++argrest) != 0) badarg = TRUE;
2119 break;
2120 }
2121
2122 if (*argrest == 'r')
2123 {
2124 list_queue_option = 8;
2125 argrest++;
2126 }
2127 else list_queue_option = 0;
2128
2129 list_queue = TRUE;
2130
2131 /* -bp: List the contents of the mail queue, top-level only */
2132
2133 if (*argrest == 0) {}
2134
2135 /* -bpu: List the contents of the mail queue, top-level undelivered */
2136
2137 else if (Ustrcmp(argrest, "u") == 0) list_queue_option += 1;
2138
2139 /* -bpa: List the contents of the mail queue, including all delivered */
2140
2141 else if (Ustrcmp(argrest, "a") == 0) list_queue_option += 2;
2142
2143 /* Unknown after -bp[r] */
2144
2145 else
2146 {
2147 badarg = TRUE;
2148 break;
2149 }
2150 }
2151
2152
2153 /* -bP: List the configuration variables given as the address list.
2154 Force -v, so configuration errors get displayed. */
2155
2156 else if (Ustrcmp(argrest, "P") == 0)
2157 {
2158 /* -bP config: we need to setup here, because later,
2159 * when list_options is checked, the config is read already */
2160 if (argv[i+1] && Ustrcmp(argv[i+1], "config") == 0)
2161 {
2162 list_config = TRUE;
2163 readconf_save_config(version_string);
2164 }
2165 else
2166 {
2167 list_options = TRUE;
2168 debug_selector |= D_v;
2169 debug_file = stderr;
2170 }
2171 }
2172
2173 /* -brt: Test retry configuration lookup */
2174
2175 else if (Ustrcmp(argrest, "rt") == 0)
2176 {
2177 checking = TRUE;
2178 test_retry_arg = i + 1;
2179 goto END_ARG;
2180 }
2181
2182 /* -brw: Test rewrite configuration */
2183
2184 else if (Ustrcmp(argrest, "rw") == 0)
2185 {
2186 checking = TRUE;
2187 test_rewrite_arg = i + 1;
2188 goto END_ARG;
2189 }
2190
2191 /* -bS: Read SMTP commands on standard input, but produce no replies -
2192 all errors are reported by sending messages. */
2193
2194 else if (Ustrcmp(argrest, "S") == 0)
2195 smtp_input = smtp_batched_input = receiving_message = TRUE;
2196
2197 /* -bs: Read SMTP commands on standard input and produce SMTP replies
2198 on standard output. */
2199
2200 else if (Ustrcmp(argrest, "s") == 0) smtp_input = receiving_message = TRUE;
2201
2202 /* -bt: address testing mode */
2203
2204 else if (Ustrcmp(argrest, "t") == 0)
2205 address_test_mode = checking = log_testing_mode = TRUE;
2206
2207 /* -bv: verify addresses */
2208
2209 else if (Ustrcmp(argrest, "v") == 0)
2210 verify_address_mode = checking = log_testing_mode = TRUE;
2211
2212 /* -bvs: verify sender addresses */
2213
2214 else if (Ustrcmp(argrest, "vs") == 0)
2215 {
2216 verify_address_mode = checking = log_testing_mode = TRUE;
2217 verify_as_sender = TRUE;
2218 }
2219
2220 /* -bV: Print version string and support details */
2221
2222 else if (Ustrcmp(argrest, "V") == 0)
2223 {
2224 printf("Exim version %s #%s built %s\n", version_string,
2225 version_cnumber, version_date);
2226 printf("%s\n", CS version_copyright);
2227 version_printed = TRUE;
2228 show_whats_supported(stdout);
2229 log_testing_mode = TRUE;
2230 }
2231
2232 /* -bw: inetd wait mode, accept a listening socket as stdin */
2233
2234 else if (*argrest == 'w')
2235 {
2236 inetd_wait_mode = TRUE;
2237 background_daemon = FALSE;
2238 daemon_listen = TRUE;
2239 if (*(++argrest) != '\0')
2240 {
2241 inetd_wait_timeout = readconf_readtime(argrest, 0, FALSE);
2242 if (inetd_wait_timeout <= 0)
2243 {
2244 fprintf(stderr, "exim: bad time value %s: abandoned\n", argv[i]);
2245 exit(EXIT_FAILURE);
2246 }
2247 }
2248 }
2249
2250 else badarg = TRUE;
2251 break;
2252
2253
2254 /* -C: change configuration file list; ignore if it isn't really
2255 a change! Enforce a prefix check if required. */
2256
2257 case 'C':
2258 if (*argrest == 0)
2259 {
2260 if(++i < argc) argrest = argv[i]; else
2261 { badarg = TRUE; break; }
2262 }
2263 if (Ustrcmp(config_main_filelist, argrest) != 0)
2264 {
2265 #ifdef ALT_CONFIG_PREFIX
2266 int sep = 0;
2267 int len = Ustrlen(ALT_CONFIG_PREFIX);
2268 uschar *list = argrest;
2269 uschar *filename;
2270 while((filename = string_nextinlist(&list, &sep, big_buffer,
2271 big_buffer_size)) != NULL)
2272 {
2273 if ((Ustrlen(filename) < len ||
2274 Ustrncmp(filename, ALT_CONFIG_PREFIX, len) != 0 ||
2275 Ustrstr(filename, "/../") != NULL) &&
2276 (Ustrcmp(filename, "/dev/null") != 0 || real_uid != root_uid))
2277 {
2278 fprintf(stderr, "-C Permission denied\n");
2279 exit(EXIT_FAILURE);
2280 }
2281 }
2282 #endif
2283 if (real_uid != root_uid)
2284 {
2285 #ifdef TRUSTED_CONFIG_LIST
2286
2287 if (real_uid != exim_uid
2288 #ifdef CONFIGURE_OWNER
2289 && real_uid != config_uid
2290 #endif
2291 )
2292 trusted_config = FALSE;
2293 else
2294 {
2295 FILE *trust_list = Ufopen(TRUSTED_CONFIG_LIST, "rb");
2296 if (trust_list)
2297 {
2298 struct stat statbuf;
2299
2300 if (fstat(fileno(trust_list), &statbuf) != 0 ||
2301 (statbuf.st_uid != root_uid /* owner not root */
2302 #ifdef CONFIGURE_OWNER
2303 && statbuf.st_uid != config_uid /* owner not the special one */
2304 #endif
2305 ) || /* or */
2306 (statbuf.st_gid != root_gid /* group not root */
2307 #ifdef CONFIGURE_GROUP
2308 && statbuf.st_gid != config_gid /* group not the special one */
2309 #endif
2310 && (statbuf.st_mode & 020) != 0 /* group writeable */
2311 ) || /* or */
2312 (statbuf.st_mode & 2) != 0) /* world writeable */
2313 {
2314 trusted_config = FALSE;
2315 fclose(trust_list);
2316 }
2317 else
2318 {
2319 /* Well, the trust list at least is up to scratch... */
2320 void *reset_point = store_get(0);
2321 uschar *trusted_configs[32];
2322 int nr_configs = 0;
2323 int i = 0;
2324
2325 while (Ufgets(big_buffer, big_buffer_size, trust_list))
2326 {
2327 uschar *start = big_buffer, *nl;
2328 while (*start && isspace(*start))
2329 start++;
2330 if (*start != '/')
2331 continue;
2332 nl = Ustrchr(start, '\n');
2333 if (nl)
2334 *nl = 0;
2335 trusted_configs[nr_configs++] = string_copy(start);
2336 if (nr_configs == 32)
2337 break;
2338 }
2339 fclose(trust_list);
2340
2341 if (nr_configs)
2342 {
2343 int sep = 0;
2344 const uschar *list = argrest;
2345 uschar *filename;
2346 while (trusted_config && (filename = string_nextinlist(&list,
2347 &sep, big_buffer, big_buffer_size)) != NULL)
2348 {
2349 for (i=0; i < nr_configs; i++)
2350 {
2351 if (Ustrcmp(filename, trusted_configs[i]) == 0)
2352 break;
2353 }
2354 if (i == nr_configs)
2355 {
2356 trusted_config = FALSE;
2357 break;
2358 }
2359 }
2360 store_reset(reset_point);
2361 }
2362 else
2363 {
2364 /* No valid prefixes found in trust_list file. */
2365 trusted_config = FALSE;
2366 }
2367 }
2368 }
2369 else
2370 {
2371 /* Could not open trust_list file. */
2372 trusted_config = FALSE;
2373 }
2374 }
2375 #else
2376 /* Not root; don't trust config */
2377 trusted_config = FALSE;
2378 #endif
2379 }
2380
2381 config_main_filelist = argrest;
2382 config_changed = TRUE;
2383 }
2384 break;
2385
2386
2387 /* -D: set up a macro definition */
2388
2389 case 'D':
2390 #ifdef DISABLE_D_OPTION
2391 fprintf(stderr, "exim: -D is not available in this Exim binary\n");
2392 exit(EXIT_FAILURE);
2393 #else
2394 {
2395 int ptr = 0;
2396 macro_item *mlast = NULL;
2397 macro_item *m;
2398 uschar name[24];
2399 uschar *s = argrest;
2400
2401 while (isspace(*s)) s++;
2402
2403 if (*s < 'A' || *s > 'Z')
2404 {
2405 fprintf(stderr, "exim: macro name set by -D must start with "
2406 "an upper case letter\n");
2407 exit(EXIT_FAILURE);
2408 }
2409
2410 while (isalnum(*s) || *s == '_')
2411 {
2412 if (ptr < sizeof(name)-1) name[ptr++] = *s;
2413 s++;
2414 }
2415 name[ptr] = 0;
2416 if (ptr == 0) { badarg = TRUE; break; }
2417 while (isspace(*s)) s++;
2418 if (*s != 0)
2419 {
2420 if (*s++ != '=') { badarg = TRUE; break; }
2421 while (isspace(*s)) s++;
2422 }
2423
2424 for (m = macros; m != NULL; m = m->next)
2425 {
2426 if (Ustrcmp(m->name, name) == 0)
2427 {
2428 fprintf(stderr, "exim: duplicated -D in command line\n");
2429 exit(EXIT_FAILURE);
2430 }
2431 mlast = m;
2432 }
2433
2434 m = store_get(sizeof(macro_item) + Ustrlen(name));
2435 m->next = NULL;
2436 m->command_line = TRUE;
2437 if (mlast == NULL) macros = m; else mlast->next = m;
2438 Ustrcpy(m->name, name);
2439 m->replacement = string_copy(s);
2440
2441 if (clmacro_count >= MAX_CLMACROS)
2442 {
2443 fprintf(stderr, "exim: too many -D options on command line\n");
2444 exit(EXIT_FAILURE);
2445 }
2446 clmacros[clmacro_count++] = string_sprintf("-D%s=%s", m->name,
2447 m->replacement);
2448 }
2449 #endif
2450 break;
2451
2452 /* -d: Set debug level (see also -v below) or set the drop_cr option.
2453 The latter is now a no-op, retained for compatibility only. If -dd is used,
2454 debugging subprocesses of the daemon is disabled. */
2455
2456 case 'd':
2457 if (Ustrcmp(argrest, "ropcr") == 0)
2458 {
2459 /* drop_cr = TRUE; */
2460 }
2461
2462 /* Use an intermediate variable so that we don't set debugging while
2463 decoding the debugging bits. */
2464
2465 else
2466 {
2467 unsigned int selector = D_default;
2468 debug_selector = 0;
2469 debug_file = NULL;
2470 if (*argrest == 'd')
2471 {
2472 debug_daemon = TRUE;
2473 argrest++;
2474 }
2475 if (*argrest != 0)
2476 decode_bits(&selector, 1, debug_notall, argrest,
2477 debug_options, debug_options_count, US"debug", 0);
2478 debug_selector = selector;
2479 }
2480 break;
2481
2482
2483 /* -E: This is a local error message. This option is not intended for
2484 external use at all, but is not restricted to trusted callers because it
2485 does no harm (just suppresses certain error messages) and if Exim is run
2486 not setuid root it won't always be trusted when it generates error
2487 messages using this option. If there is a message id following -E, point
2488 message_reference at it, for logging. */
2489
2490 case 'E':
2491 local_error_message = TRUE;
2492 if (mac_ismsgid(argrest)) message_reference = argrest;
2493 break;
2494
2495
2496 /* -ex: The vacation program calls sendmail with the undocumented "-eq"
2497 option, so it looks as if historically the -oex options are also callable
2498 without the leading -o. So we have to accept them. Before the switch,
2499 anything starting -oe has been converted to -e. Exim does not support all
2500 of the sendmail error options. */
2501
2502 case 'e':
2503 if (Ustrcmp(argrest, "e") == 0)
2504 {
2505 arg_error_handling = ERRORS_SENDER;
2506 errors_sender_rc = EXIT_SUCCESS;
2507 }
2508 else if (Ustrcmp(argrest, "m") == 0) arg_error_handling = ERRORS_SENDER;
2509 else if (Ustrcmp(argrest, "p") == 0) arg_error_handling = ERRORS_STDERR;
2510 else if (Ustrcmp(argrest, "q") == 0) arg_error_handling = ERRORS_STDERR;
2511 else if (Ustrcmp(argrest, "w") == 0) arg_error_handling = ERRORS_SENDER;
2512 else badarg = TRUE;
2513 break;
2514
2515
2516 /* -F: Set sender's full name, used instead of the gecos entry from
2517 the password file. Since users can usually alter their gecos entries,
2518 there's no security involved in using this instead. The data can follow
2519 the -F or be in the next argument. */
2520
2521 case 'F':
2522 if (*argrest == 0)
2523 {
2524 if(++i < argc) argrest = argv[i]; else
2525 { badarg = TRUE; break; }
2526 }
2527 originator_name = argrest;
2528 sender_name_forced = TRUE;
2529 break;
2530
2531
2532 /* -f: Set sender's address - this value is only actually used if Exim is
2533 run by a trusted user, or if untrusted_set_sender is set and matches the
2534 address, except that the null address can always be set by any user. The
2535 test for this happens later, when the value given here is ignored when not
2536 permitted. For an untrusted user, the actual sender is still put in Sender:
2537 if it doesn't match the From: header (unless no_local_from_check is set).
2538 The data can follow the -f or be in the next argument. The -r switch is an
2539 obsolete form of -f but since there appear to be programs out there that
2540 use anything that sendmail has ever supported, better accept it - the
2541 synonymizing is done before the switch above.
2542
2543 At this stage, we must allow domain literal addresses, because we don't
2544 know what the setting of allow_domain_literals is yet. Ditto for trailing
2545 dots and strip_trailing_dot. */
2546
2547 case 'f':
2548 {
2549 int dummy_start, dummy_end;
2550 uschar *errmess;
2551 if (*argrest == 0)
2552 {
2553 if (i+1 < argc) argrest = argv[++i]; else
2554 { badarg = TRUE; break; }
2555 }
2556 if (*argrest == 0)
2557 sender_address = string_sprintf(""); /* Ensure writeable memory */
2558 else
2559 {
2560 uschar *temp = argrest + Ustrlen(argrest) - 1;
2561 while (temp >= argrest && isspace(*temp)) temp--;
2562 if (temp >= argrest && *temp == '.') f_end_dot = TRUE;
2563 allow_domain_literals = TRUE;
2564 strip_trailing_dot = TRUE;
2565 #ifdef SUPPORT_I18N
2566 allow_utf8_domains = TRUE;
2567 #endif
2568 sender_address = parse_extract_address(argrest, &errmess,
2569 &dummy_start, &dummy_end, &sender_address_domain, TRUE);
2570 #ifdef SUPPORT_I18N
2571 message_smtputf8 = string_is_utf8(sender_address);
2572 allow_utf8_domains = FALSE;
2573 #endif
2574 allow_domain_literals = FALSE;
2575 strip_trailing_dot = FALSE;
2576 if (sender_address == NULL)
2577 {
2578 fprintf(stderr, "exim: bad -f address \"%s\": %s\n", argrest, errmess);
2579 return EXIT_FAILURE;
2580 }
2581 }
2582 sender_address_forced = TRUE;
2583 }
2584 break;
2585
2586 /* -G: sendmail invocation to specify that it's a gateway submission and
2587 sendmail may complain about problems instead of fixing them.
2588 We make it equivalent to an ACL "control = suppress_local_fixups" and do
2589 not at this time complain about problems. */
2590
2591 case 'G':
2592 flag_G = TRUE;
2593 break;
2594
2595 /* -h: Set the hop count for an incoming message. Exim does not currently
2596 support this; it always computes it by counting the Received: headers.
2597 To put it in will require a change to the spool header file format. */
2598
2599 case 'h':
2600 if (*argrest == 0)
2601 {
2602 if(++i < argc) argrest = argv[i]; else
2603 { badarg = TRUE; break; }
2604 }
2605 if (!isdigit(*argrest)) badarg = TRUE;
2606 break;
2607
2608
2609 /* -i: Set flag so dot doesn't end non-SMTP input (same as -oi, seems
2610 not to be documented for sendmail but mailx (at least) uses it) */
2611
2612 case 'i':
2613 if (*argrest == 0) dot_ends = FALSE; else badarg = TRUE;
2614 break;
2615
2616
2617 /* -L: set the identifier used for syslog; equivalent to setting
2618 syslog_processname in the config file, but needs to be an admin option. */
2619
2620 case 'L':
2621 if (*argrest == '\0')
2622 {
2623 if(++i < argc) argrest = argv[i]; else
2624 { badarg = TRUE; break; }
2625 }
2626 sz = Ustrlen(argrest);
2627 if (sz > 32)
2628 {
2629 fprintf(stderr, "exim: the -L syslog name is too long: \"%s\"\n", argrest);
2630 return EXIT_FAILURE;
2631 }
2632 if (sz < 1)
2633 {
2634 fprintf(stderr, "exim: the -L syslog name is too short\n");
2635 return EXIT_FAILURE;
2636 }
2637 cmdline_syslog_name = argrest;
2638 break;
2639
2640 case 'M':
2641 receiving_message = FALSE;
2642
2643 /* -MC: continue delivery of another message via an existing open
2644 file descriptor. This option is used for an internal call by the
2645 smtp transport when there is a pending message waiting to go to an
2646 address to which it has got a connection. Five subsequent arguments are
2647 required: transport name, host name, IP address, sequence number, and
2648 message_id. Transports may decline to create new processes if the sequence
2649 number gets too big. The channel is stdin. This (-MC) must be the last
2650 argument. There's a subsequent check that the real-uid is privileged.
2651
2652 If we are running in the test harness. delay for a bit, to let the process
2653 that set this one up complete. This makes for repeatability of the logging,
2654 etc. output. */
2655
2656 if (Ustrcmp(argrest, "C") == 0)
2657 {
2658 union sockaddr_46 interface_sock;
2659 EXIM_SOCKLEN_T size = sizeof(interface_sock);
2660
2661 if (argc != i + 6)
2662 {
2663 fprintf(stderr, "exim: too many or too few arguments after -MC\n");
2664 return EXIT_FAILURE;
2665 }
2666
2667 if (msg_action_arg >= 0)
2668 {
2669 fprintf(stderr, "exim: incompatible arguments\n");
2670 return EXIT_FAILURE;
2671 }
2672
2673 continue_transport = argv[++i];
2674 continue_hostname = argv[++i];
2675 continue_host_address = argv[++i];
2676 continue_sequence = Uatoi(argv[++i]);
2677 msg_action = MSG_DELIVER;
2678 msg_action_arg = ++i;
2679 forced_delivery = TRUE;
2680 queue_run_pid = passed_qr_pid;
2681 queue_run_pipe = passed_qr_pipe;
2682
2683 if (!mac_ismsgid(argv[i]))
2684 {
2685 fprintf(stderr, "exim: malformed message id %s after -MC option\n",
2686 argv[i]);
2687 return EXIT_FAILURE;
2688 }
2689
2690 /* Set up $sending_ip_address and $sending_port */
2691
2692 if (getsockname(fileno(stdin), (struct sockaddr *)(&interface_sock),
2693 &size) == 0)
2694 sending_ip_address = host_ntoa(-1, &interface_sock, NULL,
2695 &sending_port);
2696 else
2697 {
2698 fprintf(stderr, "exim: getsockname() failed after -MC option: %s\n",
2699 strerror(errno));
2700 return EXIT_FAILURE;
2701 }
2702
2703 if (running_in_test_harness) millisleep(500);
2704 break;
2705 }
2706
2707 /* -MCA: set the smtp_authenticated flag; this is useful only when it
2708 precedes -MC (see above). The flag indicates that the host to which
2709 Exim is connected has accepted an AUTH sequence. */
2710
2711 else if (Ustrcmp(argrest, "CA") == 0)
2712 {
2713 smtp_authenticated = TRUE;
2714 break;
2715 }
2716
2717 /* -MCD: set the smtp_use_dsn flag; this indicates that the host
2718 that exim is connected to supports the esmtp extension DSN */
2719
2720 else if (Ustrcmp(argrest, "CD") == 0)
2721 {
2722 smtp_use_dsn = TRUE;
2723 break;
2724 }
2725
2726 /* -MCG: set the queue name, to a non-default value
2727
2728 else if (Ustrcmp(argrest, "CG") == 0)
2729 {
2730 if (++i < argc) queue_name = string_copy(argv[i]);
2731 else badarg = TRUE;
2732 break;
2733 }
2734
2735 /* -MCP: set the smtp_use_pipelining flag; this is useful only when
2736 it preceded -MC (see above) */
2737
2738 else if (Ustrcmp(argrest, "CP") == 0)
2739 {
2740 smtp_use_pipelining = TRUE;
2741 break;
2742 }
2743
2744 /* -MCQ: pass on the pid of the queue-running process that started
2745 this chain of deliveries and the fd of its synchronizing pipe; this
2746 is useful only when it precedes -MC (see above) */
2747
2748 else if (Ustrcmp(argrest, "CQ") == 0)
2749 {
2750 if (++i < argc) passed_qr_pid = (pid_t)(Uatol(argv[i]));
2751 else badarg = TRUE;
2752 if (++i < argc) passed_qr_pipe = (int)(Uatol(argv[i]));
2753 else badarg = TRUE;
2754 break;
2755 }
2756
2757 /* -MCS: set the smtp_use_size flag; this is useful only when it
2758 precedes -MC (see above) */
2759
2760 else if (Ustrcmp(argrest, "CS") == 0)
2761 {
2762 smtp_use_size = TRUE;
2763 break;
2764 }
2765
2766 /* -MCT: set the tls_offered flag; this is useful only when it
2767 precedes -MC (see above). The flag indicates that the host to which
2768 Exim is connected has offered TLS support. */
2769
2770 #ifdef SUPPORT_TLS
2771 else if (Ustrcmp(argrest, "CT") == 0)
2772 {
2773 tls_offered = TRUE;
2774 break;
2775 }
2776 #endif
2777
2778 /* -M[x]: various operations on the following list of message ids:
2779 -M deliver the messages, ignoring next retry times and thawing
2780 -Mc deliver the messages, checking next retry times, no thawing
2781 -Mf freeze the messages
2782 -Mg give up on the messages
2783 -Mt thaw the messages
2784 -Mrm remove the messages
2785 In the above cases, this must be the last option. There are also the
2786 following options which are followed by a single message id, and which
2787 act on that message. Some of them use the "recipient" addresses as well.
2788 -Mar add recipient(s)
2789 -Mmad mark all recipients delivered
2790 -Mmd mark recipients(s) delivered
2791 -Mes edit sender
2792 -Mset load a message for use with -be
2793 -Mvb show body
2794 -Mvc show copy (of whole message, in RFC 2822 format)
2795 -Mvh show header
2796 -Mvl show log
2797 */
2798
2799 else if (*argrest == 0)
2800 {
2801 msg_action = MSG_DELIVER;
2802 forced_delivery = deliver_force_thaw = TRUE;
2803 }
2804 else if (Ustrcmp(argrest, "ar") == 0)
2805 {
2806 msg_action = MSG_ADD_RECIPIENT;
2807 one_msg_action = TRUE;
2808 }
2809 else if (Ustrcmp(argrest, "c") == 0) msg_action = MSG_DELIVER;
2810 else if (Ustrcmp(argrest, "es") == 0)
2811 {
2812 msg_action = MSG_EDIT_SENDER;
2813 one_msg_action = TRUE;
2814 }
2815 else if (Ustrcmp(argrest, "f") == 0) msg_action = MSG_FREEZE;
2816 else if (Ustrcmp(argrest, "g") == 0)
2817 {
2818 msg_action = MSG_DELIVER;
2819 deliver_give_up = TRUE;
2820 }
2821 else if (Ustrcmp(argrest, "mad") == 0)
2822 {
2823 msg_action = MSG_MARK_ALL_DELIVERED;
2824 }
2825 else if (Ustrcmp(argrest, "md") == 0)
2826 {
2827 msg_action = MSG_MARK_DELIVERED;
2828 one_msg_action = TRUE;
2829 }
2830 else if (Ustrcmp(argrest, "rm") == 0) msg_action = MSG_REMOVE;
2831 else if (Ustrcmp(argrest, "set") == 0)
2832 {
2833 msg_action = MSG_LOAD;
2834 one_msg_action = TRUE;
2835 }
2836 else if (Ustrcmp(argrest, "t") == 0) msg_action = MSG_THAW;
2837 else if (Ustrcmp(argrest, "vb") == 0)
2838 {
2839 msg_action = MSG_SHOW_BODY;
2840 one_msg_action = TRUE;
2841 }
2842 else if (Ustrcmp(argrest, "vc") == 0)
2843 {
2844 msg_action = MSG_SHOW_COPY;
2845 one_msg_action = TRUE;
2846 }
2847 else if (Ustrcmp(argrest, "vh") == 0)
2848 {
2849 msg_action = MSG_SHOW_HEADER;
2850 one_msg_action = TRUE;
2851 }
2852 else if (Ustrcmp(argrest, "vl") == 0)
2853 {
2854 msg_action = MSG_SHOW_LOG;
2855 one_msg_action = TRUE;
2856 }
2857 else { badarg = TRUE; break; }
2858
2859 /* All the -Mxx options require at least one message id. */
2860
2861 msg_action_arg = i + 1;
2862 if (msg_action_arg >= argc)
2863 {
2864 fprintf(stderr, "exim: no message ids given after %s option\n", arg);
2865 return EXIT_FAILURE;
2866 }
2867
2868 /* Some require only message ids to follow */
2869
2870 if (!one_msg_action)
2871 {
2872 int j;
2873 for (j = msg_action_arg; j < argc; j++) if (!mac_ismsgid(argv[j]))
2874 {
2875 fprintf(stderr, "exim: malformed message id %s after %s option\n",
2876 argv[j], arg);
2877 return EXIT_FAILURE;
2878 }
2879 goto END_ARG; /* Remaining args are ids */
2880 }
2881
2882 /* Others require only one message id, possibly followed by addresses,
2883 which will be handled as normal arguments. */
2884
2885 else
2886 {
2887 if (!mac_ismsgid(argv[msg_action_arg]))
2888 {
2889 fprintf(stderr, "exim: malformed message id %s after %s option\n",
2890 argv[msg_action_arg], arg);
2891 return EXIT_FAILURE;
2892 }
2893 i++;
2894 }
2895 break;
2896
2897
2898 /* Some programs seem to call the -om option without the leading o;
2899 for sendmail it askes for "me too". Exim always does this. */
2900
2901 case 'm':
2902 if (*argrest != 0) badarg = TRUE;
2903 break;
2904
2905
2906 /* -N: don't do delivery - a debugging option that stops transports doing
2907 their thing. It implies debugging at the D_v level. */
2908
2909 case 'N':
2910 if (*argrest == 0)
2911 {
2912 dont_deliver = TRUE;
2913 debug_selector |= D_v;
2914 debug_file = stderr;
2915 }
2916 else badarg = TRUE;
2917 break;
2918
2919
2920 /* -n: This means "don't alias" in sendmail, apparently.
2921 For normal invocations, it has no effect.
2922 It may affect some other options. */
2923
2924 case 'n':
2925 flag_n = TRUE;
2926 break;
2927
2928 /* -O: Just ignore it. In sendmail, apparently -O option=value means set
2929 option to the specified value. This form uses long names. We need to handle
2930 -O option=value and -Ooption=value. */
2931
2932 case 'O':
2933 if (*argrest == 0)
2934 {
2935 if (++i >= argc)
2936 {
2937 fprintf(stderr, "exim: string expected after -O\n");
2938 exit(EXIT_FAILURE);
2939 }
2940 }
2941 break;
2942
2943 case 'o':
2944
2945 /* -oA: Set an argument for the bi command (sendmail's "alternate alias
2946 file" option). */
2947
2948 if (*argrest == 'A')
2949 {
2950 alias_arg = argrest + 1;
2951 if (alias_arg[0] == 0)
2952 {
2953 if (i+1 < argc) alias_arg = argv[++i]; else
2954 {
2955 fprintf(stderr, "exim: string expected after -oA\n");
2956 exit(EXIT_FAILURE);
2957 }
2958 }
2959 }
2960
2961 /* -oB: Set a connection message max value for remote deliveries */
2962
2963 else if (*argrest == 'B')
2964 {
2965 uschar *p = argrest + 1;
2966 if (p[0] == 0)
2967 {
2968 if (i+1 < argc && isdigit((argv[i+1][0]))) p = argv[++i]; else
2969 {
2970 connection_max_messages = 1;
2971 p = NULL;
2972 }
2973 }
2974
2975 if (p != NULL)
2976 {
2977 if (!isdigit(*p))
2978 {
2979 fprintf(stderr, "exim: number expected after -oB\n");
2980 exit(EXIT_FAILURE);
2981 }
2982 connection_max_messages = Uatoi(p);
2983 }
2984 }
2985
2986 /* -odb: background delivery */
2987
2988 else if (Ustrcmp(argrest, "db") == 0)
2989 {
2990 synchronous_delivery = FALSE;
2991 arg_queue_only = FALSE;
2992 queue_only_set = TRUE;
2993 }
2994
2995 /* -odf: foreground delivery (smail-compatible option); same effect as
2996 -odi: interactive (synchronous) delivery (sendmail-compatible option)
2997 */
2998
2999 else if (Ustrcmp(argrest, "df") == 0 || Ustrcmp(argrest, "di") == 0)
3000 {
3001 synchronous_delivery = TRUE;
3002 arg_queue_only = FALSE;
3003 queue_only_set = TRUE;
3004 }
3005
3006 /* -odq: queue only */
3007
3008 else if (Ustrcmp(argrest, "dq") == 0)
3009 {
3010 synchronous_delivery = FALSE;
3011 arg_queue_only = TRUE;
3012 queue_only_set = TRUE;
3013 }
3014
3015 /* -odqs: queue SMTP only - do local deliveries and remote routing,
3016 but no remote delivery */
3017
3018 else if (Ustrcmp(argrest, "dqs") == 0)
3019 {
3020 queue_smtp = TRUE;
3021 arg_queue_only = FALSE;
3022 queue_only_set = TRUE;
3023 }
3024
3025 /* -oex: Sendmail error flags. As these are also accepted without the
3026 leading -o prefix, for compatibility with vacation and other callers,
3027 they are handled with -e above. */
3028
3029 /* -oi: Set flag so dot doesn't end non-SMTP input (same as -i)
3030 -oitrue: Another sendmail syntax for the same */
3031
3032 else if (Ustrcmp(argrest, "i") == 0 ||
3033 Ustrcmp(argrest, "itrue") == 0)
3034 dot_ends = FALSE;
3035
3036 /* -oM*: Set various characteristics for an incoming message; actually
3037 acted on for trusted callers only. */
3038
3039 else if (*argrest == 'M')
3040 {
3041 if (i+1 >= argc)
3042 {
3043 fprintf(stderr, "exim: data expected after -o%s\n", argrest);
3044 exit(EXIT_FAILURE);
3045 }
3046
3047 /* -oMa: Set sender host address */
3048
3049 if (Ustrcmp(argrest, "Ma") == 0) sender_host_address = argv[++i];
3050
3051 /* -oMaa: Set authenticator name */
3052
3053 else if (Ustrcmp(argrest, "Maa") == 0)
3054 sender_host_authenticated = argv[++i];
3055
3056 /* -oMas: setting authenticated sender */
3057
3058 else if (Ustrcmp(argrest, "Mas") == 0) authenticated_sender = argv[++i];
3059
3060 /* -oMai: setting authenticated id */
3061
3062 else if (Ustrcmp(argrest, "Mai") == 0) authenticated_id = argv[++i];
3063
3064 /* -oMi: Set incoming interface address */
3065
3066 else if (Ustrcmp(argrest, "Mi") == 0) interface_address = argv[++i];
3067
3068 /* -oMm: Message reference */
3069
3070 else if (Ustrcmp(argrest, "Mm") == 0)
3071 {
3072 if (!mac_ismsgid(argv[i+1]))
3073 {
3074 fprintf(stderr,"-oMm must be a valid message ID\n");
3075 exit(EXIT_FAILURE);
3076 }
3077 if (!trusted_config)
3078 {
3079 fprintf(stderr,"-oMm must be called by a trusted user/config\n");
3080 exit(EXIT_FAILURE);
3081 }
3082 message_reference = argv[++i];
3083 }
3084
3085 /* -oMr: Received protocol */
3086
3087 else if (Ustrcmp(argrest, "Mr") == 0) received_protocol = argv[++i];
3088
3089 /* -oMs: Set sender host name */
3090
3091 else if (Ustrcmp(argrest, "Ms") == 0) sender_host_name = argv[++i];
3092
3093 /* -oMt: Set sender ident */
3094
3095 else if (Ustrcmp(argrest, "Mt") == 0)
3096 {
3097 sender_ident_set = TRUE;
3098 sender_ident = argv[++i];
3099 }
3100
3101 /* Else a bad argument */
3102
3103 else
3104 {
3105 badarg = TRUE;
3106 break;
3107 }
3108 }
3109
3110 /* -om: Me-too flag for aliases. Exim always does this. Some programs
3111 seem to call this as -m (undocumented), so that is also accepted (see
3112 above). */
3113
3114 else if (Ustrcmp(argrest, "m") == 0) {}
3115
3116 /* -oo: An ancient flag for old-style addresses which still seems to
3117 crop up in some calls (see in SCO). */
3118
3119 else if (Ustrcmp(argrest, "o") == 0) {}
3120
3121 /* -oP <name>: set pid file path for daemon */
3122
3123 else if (Ustrcmp(argrest, "P") == 0)
3124 override_pid_file_path = argv[++i];
3125
3126 /* -or <n>: set timeout for non-SMTP acceptance
3127 -os <n>: set timeout for SMTP acceptance */
3128
3129 else if (*argrest == 'r' || *argrest == 's')
3130 {
3131 int *tp = (*argrest == 'r')?
3132 &arg_receive_timeout : &arg_smtp_receive_timeout;
3133 if (argrest[1] == 0)
3134 {
3135 if (i+1 < argc) *tp= readconf_readtime(argv[++i], 0, FALSE);
3136 }
3137 else *tp = readconf_readtime(argrest + 1, 0, FALSE);
3138 if (*tp < 0)
3139 {
3140 fprintf(stderr, "exim: bad time value %s: abandoned\n", argv[i]);
3141 exit(EXIT_FAILURE);
3142 }
3143 }
3144
3145 /* -oX <list>: Override local_interfaces and/or default daemon ports */
3146
3147 else if (Ustrcmp(argrest, "X") == 0)
3148 override_local_interfaces = argv[++i];
3149
3150 /* Unknown -o argument */
3151
3152 else badarg = TRUE;
3153 break;
3154
3155
3156 /* -ps: force Perl startup; -pd force delayed Perl startup */
3157
3158 case 'p':
3159 #ifdef EXIM_PERL
3160 if (*argrest == 's' && argrest[1] == 0)
3161 {
3162 perl_start_option = 1;
3163 break;
3164 }
3165 if (*argrest == 'd' && argrest[1] == 0)
3166 {
3167 perl_start_option = -1;
3168 break;
3169 }
3170 #endif
3171
3172 /* -panythingelse is taken as the Sendmail-compatible argument -prval:sval,
3173 which sets the host protocol and host name */
3174
3175 if (*argrest == 0)
3176 {
3177 if (i+1 < argc) argrest = argv[++i]; else
3178 { badarg = TRUE; break; }
3179 }
3180
3181 if (*argrest != 0)
3182 {
3183 uschar *hn = Ustrchr(argrest, ':');
3184 if (hn == NULL)
3185 {
3186 received_protocol = argrest;
3187 }
3188 else
3189 {
3190 received_protocol = string_copyn(argrest, hn - argrest);
3191 sender_host_name = hn + 1;
3192 }
3193 }
3194 break;
3195
3196
3197 case 'q':
3198 receiving_message = FALSE;
3199 if (queue_interval >= 0)
3200 {
3201 fprintf(stderr, "exim: -q specified more than once\n");
3202 exit(EXIT_FAILURE);
3203 }
3204
3205 /* -qq...: Do queue runs in a 2-stage manner */
3206
3207 if (*argrest == 'q')
3208 {
3209 queue_2stage = TRUE;
3210 argrest++;
3211 }
3212
3213 /* -qi...: Do only first (initial) deliveries */
3214
3215 if (*argrest == 'i')
3216 {
3217 queue_run_first_delivery = TRUE;
3218 argrest++;
3219 }
3220
3221 /* -qf...: Run the queue, forcing deliveries
3222 -qff..: Ditto, forcing thawing as well */
3223
3224 if (*argrest == 'f')
3225 {
3226 queue_run_force = TRUE;
3227 if (*(++argrest) == 'f')
3228 {
3229 deliver_force_thaw = TRUE;
3230 argrest++;
3231 }
3232 }
3233
3234 /* -q[f][f]l...: Run the queue only on local deliveries */
3235
3236 if (*argrest == 'l')
3237 {
3238 queue_run_local = TRUE;
3239 argrest++;
3240 }
3241
3242 /* -q[f][f][l][G<name>]... Run the named queue */
3243
3244 if (*argrest == 'G')
3245 {
3246 queue_name = string_copy(argrest+1);
3247 do ++argrest; while (*argrest);
3248 }
3249
3250 /* -q[f][f][l][G<name>]: Run the queue, optionally forced, optionally local
3251 only, optionally named, optionally starting from a given message id. */
3252
3253 if (*argrest == 0 &&
3254 (i + 1 >= argc || argv[i+1][0] == '-' || mac_ismsgid(argv[i+1])))
3255 {
3256 queue_interval = 0;
3257 if (i+1 < argc && mac_ismsgid(argv[i+1]))
3258 start_queue_run_id = argv[++i];
3259 if (i+1 < argc && mac_ismsgid(argv[i+1]))
3260 stop_queue_run_id = argv[++i];
3261 }
3262
3263 /* -q[f][f][l]<n>: Run the queue at regular intervals, optionally forced,
3264 optionally local only. */
3265
3266 else
3267 {
3268 if (*argrest != 0)
3269 queue_interval = readconf_readtime(argrest, 0, FALSE);
3270 else
3271 queue_interval = readconf_readtime(argv[++i], 0, FALSE);
3272 if (queue_interval <= 0)
3273 {
3274 fprintf(stderr, "exim: bad time value %s: abandoned\n", argv[i]);
3275 exit(EXIT_FAILURE);
3276 }
3277 }
3278 break;
3279
3280
3281 case 'R': /* Synonymous with -qR... */
3282 receiving_message = FALSE;
3283
3284 /* -Rf: As -R (below) but force all deliveries,
3285 -Rff: Ditto, but also thaw all frozen messages,
3286 -Rr: String is regex
3287 -Rrf: Regex and force
3288 -Rrff: Regex and force and thaw
3289
3290 in all cases provided there are no further characters in this
3291 argument. */
3292
3293 if (*argrest != 0)
3294 {
3295 int i;
3296 for (i = 0; i < sizeof(rsopts)/sizeof(uschar *); i++)
3297 {
3298 if (Ustrcmp(argrest, rsopts[i]) == 0)
3299 {
3300 if (i != 2) queue_run_force = TRUE;
3301 if (i >= 2) deliver_selectstring_regex = TRUE;
3302 if (i == 1 || i == 4) deliver_force_thaw = TRUE;
3303 argrest += Ustrlen(rsopts[i]);
3304 }
3305 }
3306 }
3307
3308 /* -R: Set string to match in addresses for forced queue run to
3309 pick out particular messages. */
3310
3311 if (*argrest == 0)
3312 {
3313 if (i+1 < argc) deliver_selectstring = argv[++i]; else
3314 {
3315 fprintf(stderr, "exim: string expected after -R\n");
3316 exit(EXIT_FAILURE);
3317 }
3318 }
3319 else deliver_selectstring = argrest;
3320 break;
3321
3322
3323 /* -r: an obsolete synonym for -f (see above) */
3324
3325
3326 /* -S: Like -R but works on sender. */
3327
3328 case 'S': /* Synonymous with -qS... */
3329 receiving_message = FALSE;
3330
3331 /* -Sf: As -S (below) but force all deliveries,
3332 -Sff: Ditto, but also thaw all frozen messages,
3333 -Sr: String is regex
3334 -Srf: Regex and force
3335 -Srff: Regex and force and thaw
3336
3337 in all cases provided there are no further characters in this
3338 argument. */
3339
3340 if (*argrest != 0)
3341 {
3342 int i;
3343 for (i = 0; i < sizeof(rsopts)/sizeof(uschar *); i++)
3344 {
3345 if (Ustrcmp(argrest, rsopts[i]) == 0)
3346 {
3347 if (i != 2) queue_run_force = TRUE;
3348 if (i >= 2) deliver_selectstring_sender_regex = TRUE;
3349 if (i == 1 || i == 4) deliver_force_thaw = TRUE;
3350 argrest += Ustrlen(rsopts[i]);
3351 }
3352 }
3353 }
3354
3355 /* -S: Set string to match in addresses for forced queue run to
3356 pick out particular messages. */
3357
3358 if (*argrest == 0)
3359 {
3360 if (i+1 < argc) deliver_selectstring_sender = argv[++i]; else
3361 {
3362 fprintf(stderr, "exim: string expected after -S\n");
3363 exit(EXIT_FAILURE);
3364 }
3365 }
3366 else deliver_selectstring_sender = argrest;
3367 break;
3368
3369 /* -Tqt is an option that is exclusively for use by the testing suite.
3370 It is not recognized in other circumstances. It allows for the setting up
3371 of explicit "queue times" so that various warning/retry things can be
3372 tested. Otherwise variability of clock ticks etc. cause problems. */
3373
3374 case 'T':
3375 if (running_in_test_harness && Ustrcmp(argrest, "qt") == 0)
3376 fudged_queue_times = argv[++i];
3377 else badarg = TRUE;
3378 break;
3379
3380
3381 /* -t: Set flag to extract recipients from body of message. */
3382
3383 case 't':
3384 if (*argrest == 0) extract_recipients = TRUE;
3385
3386 /* -ti: Set flag to extract recipients from body of message, and also
3387 specify that dot does not end the message. */
3388
3389 else if (Ustrcmp(argrest, "i") == 0)
3390 {
3391 extract_recipients = TRUE;
3392 dot_ends = FALSE;
3393 }
3394
3395 /* -tls-on-connect: don't wait for STARTTLS (for old clients) */
3396
3397 #ifdef SUPPORT_TLS
3398 else if (Ustrcmp(argrest, "ls-on-connect") == 0) tls_in.on_connect = TRUE;
3399 #endif
3400
3401 else badarg = TRUE;
3402 break;
3403
3404
3405 /* -U: This means "initial user submission" in sendmail, apparently. The
3406 doc claims that in future sendmail may refuse syntactically invalid
3407 messages instead of fixing them. For the moment, we just ignore it. */
3408
3409 case 'U':
3410 break;
3411
3412
3413 /* -v: verify things - this is a very low-level debugging */
3414
3415 case 'v':
3416 if (*argrest == 0)
3417 {
3418 debug_selector |= D_v;
3419 debug_file = stderr;
3420 }
3421 else badarg = TRUE;
3422 break;
3423
3424
3425 /* -x: AIX uses this to indicate some fancy 8-bit character stuff:
3426
3427 The -x flag tells the sendmail command that mail from a local
3428 mail program has National Language Support (NLS) extended characters
3429 in the body of the mail item. The sendmail command can send mail with
3430 extended NLS characters across networks that normally corrupts these
3431 8-bit characters.
3432
3433 As Exim is 8-bit clean, it just ignores this flag. */
3434
3435 case 'x':
3436 if (*argrest != 0) badarg = TRUE;
3437 break;
3438
3439 /* -X: in sendmail: takes one parameter, logfile, and sends debugging
3440 logs to that file. We swallow the parameter and otherwise ignore it. */
3441
3442 case 'X':
3443 if (*argrest == '\0')
3444 if (++i >= argc)
3445 {
3446 fprintf(stderr, "exim: string expected after -X\n");
3447 exit(EXIT_FAILURE);
3448 }
3449 break;
3450
3451 case 'z':
3452 if (*argrest == '\0')
3453 if (++i < argc) log_oneline = argv[i]; else
3454 {
3455 fprintf(stderr, "exim: file name expected after %s\n", argv[i-1]);
3456 exit(EXIT_FAILURE);
3457 }
3458 break;
3459
3460 /* All other initial characters are errors */
3461
3462 default:
3463 badarg = TRUE;
3464 break;
3465 } /* End of high-level switch statement */
3466
3467 /* Failed to recognize the option, or syntax error */
3468
3469 if (badarg)
3470 {
3471 fprintf(stderr, "exim abandoned: unknown, malformed, or incomplete "
3472 "option %s\n", arg);
3473 exit(EXIT_FAILURE);
3474 }
3475 }
3476
3477
3478 /* If -R or -S have been specified without -q, assume a single queue run. */
3479
3480 if ((deliver_selectstring != NULL || deliver_selectstring_sender != NULL) &&
3481 queue_interval < 0) queue_interval = 0;
3482
3483
3484 END_ARG:
3485 /* If usage_wanted is set we call the usage function - which never returns */
3486 if (usage_wanted) exim_usage(called_as);
3487
3488 /* Arguments have been processed. Check for incompatibilities. */
3489 if ((
3490 (smtp_input || extract_recipients || recipients_arg < argc) &&
3491 (daemon_listen || queue_interval >= 0 || bi_option ||
3492 test_retry_arg >= 0 || test_rewrite_arg >= 0 ||
3493 filter_test != FTEST_NONE || (msg_action_arg > 0 && !one_msg_action))
3494 ) ||
3495 (
3496 msg_action_arg > 0 &&
3497 (daemon_listen || queue_interval >= 0 || list_options ||
3498 (checking && msg_action != MSG_LOAD) ||
3499 bi_option || test_retry_arg >= 0 || test_rewrite_arg >= 0)
3500 ) ||
3501 (
3502 (daemon_listen || queue_interval >= 0) &&
3503 (sender_address != NULL || list_options || list_queue || checking ||
3504 bi_option)
3505 ) ||
3506 (
3507 daemon_listen && queue_interval == 0
3508 ) ||
3509 (
3510 inetd_wait_mode && queue_interval >= 0
3511 ) ||
3512 (
3513 list_options &&
3514 (checking || smtp_input || extract_recipients ||
3515 filter_test != FTEST_NONE || bi_option)
3516 ) ||
3517 (
3518 verify_address_mode &&
3519 (address_test_mode || smtp_input || extract_recipients ||
3520 filter_test != FTEST_NONE || bi_option)
3521 ) ||
3522 (
3523 address_test_mode && (smtp_input || extract_recipients ||
3524 filter_test != FTEST_NONE || bi_option)
3525 ) ||
3526 (
3527 smtp_input && (sender_address != NULL || filter_test != FTEST_NONE ||
3528 extract_recipients)
3529 ) ||
3530 (
3531 deliver_selectstring != NULL && queue_interval < 0
3532 ) ||
3533 (
3534 msg_action == MSG_LOAD &&
3535 (!expansion_test || expansion_test_message != NULL)
3536 )
3537 )
3538 {
3539 fprintf(stderr, "exim: incompatible command-line options or arguments\n");
3540 exit(EXIT_FAILURE);
3541 }
3542
3543 /* If debugging is set up, set the file and the file descriptor to pass on to
3544 child processes. It should, of course, be 2 for stderr. Also, force the daemon