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