Fix check for commandline macro definition
[exim.git] / src / src / exim.c
1 /*************************************************
2 * Exim - an Internet mail transport agent *
3 *************************************************/
4
5 /* Copyright (c) University of Cambridge 1995 - 2016 */
6 /* See the file NOTICE for conditions of use and distribution. */
7
8
9 /* The main function: entry point, initialization, and high-level control.
10 Also a few functions that don't naturally fit elsewhere. */
11
12
13 #include "exim.h"
14
15 #ifdef __GLIBC__
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 fd = Uopen(process_log_path, O_APPEND|O_WRONLY, LOG_MODE);
216 if (fd < 0)
217 {
218 /* If we are already running as the Exim user, try to create it in the
219 current process (assuming spool_directory exists). Otherwise, if we are
220 root, do the creation in an exim:exim subprocess. */
221
222 int euid = geteuid();
223 if (euid == exim_uid)
224 fd = Uopen(process_log_path, O_CREAT|O_APPEND|O_WRONLY, LOG_MODE);
225 else if (euid == root_uid)
226 fd = log_create_as_exim(process_log_path);
227 }
228
229 /* If we are neither exim nor root, or if we failed to create the log file,
230 give up. There is not much useful we can do with errors, since we don't want
231 to disrupt whatever is going on outside the signal handler. */
232
233 if (fd < 0) return;
234
235 (void)write(fd, process_info, process_info_len);
236 (void)close(fd);
237 }
238
239
240
241 /*************************************************
242 * Timeout handler *
243 *************************************************/
244
245 /* This handler is enabled most of the time that Exim is running. The handler
246 doesn't actually get used unless alarm() has been called to set a timer, to
247 place a time limit on a system call of some kind. When the handler is run, it
248 re-enables itself.
249
250 There are some other SIGALRM handlers that are used in special cases when more
251 than just a flag setting is required; for example, when reading a message's
252 input. These are normally set up in the code module that uses them, and the
253 SIGALRM handler is reset to this one afterwards.
254
255 Argument: the signal value (SIGALRM)
256 Returns: nothing
257 */
258
259 void
260 sigalrm_handler(int sig)
261 {
262 sig = sig; /* Keep picky compilers happy */
263 sigalrm_seen = TRUE;
264 os_non_restarting_signal(SIGALRM, sigalrm_handler);
265 }
266
267
268
269 /*************************************************
270 * Sleep for a fractional time interval *
271 *************************************************/
272
273 /* This function is called by millisleep() and exim_wait_tick() to wait for a
274 period of time that may include a fraction of a second. The coding is somewhat
275 tedious. We do not expect setitimer() ever to fail, but if it does, the process
276 will wait for ever, so we panic in this instance. (There was a case of this
277 when a bug in a function that calls milliwait() caused it to pass invalid data.
278 That's when I added the check. :-)
279
280 We assume it to be not worth sleeping for under 100us; this value will
281 require revisiting as hardware advances. This avoids the issue of
282 a zero-valued timer setting meaning "never fire".
283
284 Argument: an itimerval structure containing the interval
285 Returns: nothing
286 */
287
288 static void
289 milliwait(struct itimerval *itval)
290 {
291 sigset_t sigmask;
292 sigset_t old_sigmask;
293
294 if (itval->it_value.tv_usec < 100 && itval->it_value.tv_sec == 0)
295 return;
296 (void)sigemptyset(&sigmask); /* Empty mask */
297 (void)sigaddset(&sigmask, SIGALRM); /* Add SIGALRM */
298 (void)sigprocmask(SIG_BLOCK, &sigmask, &old_sigmask); /* Block SIGALRM */
299 if (setitimer(ITIMER_REAL, itval, NULL) < 0) /* Start timer */
300 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
301 "setitimer() failed: %s", strerror(errno));
302 (void)sigfillset(&sigmask); /* All signals */
303 (void)sigdelset(&sigmask, SIGALRM); /* Remove SIGALRM */
304 (void)sigsuspend(&sigmask); /* Until SIGALRM */
305 (void)sigprocmask(SIG_SETMASK, &old_sigmask, NULL); /* Restore mask */
306 }
307
308
309
310
311 /*************************************************
312 * Millisecond sleep function *
313 *************************************************/
314
315 /* The basic sleep() function has a granularity of 1 second, which is too rough
316 in some cases - for example, when using an increasing delay to slow down
317 spammers.
318
319 Argument: number of millseconds
320 Returns: nothing
321 */
322
323 void
324 millisleep(int msec)
325 {
326 struct itimerval itval;
327 itval.it_interval.tv_sec = 0;
328 itval.it_interval.tv_usec = 0;
329 itval.it_value.tv_sec = msec/1000;
330 itval.it_value.tv_usec = (msec % 1000) * 1000;
331 milliwait(&itval);
332 }
333
334
335
336 /*************************************************
337 * Compare microsecond times *
338 *************************************************/
339
340 /*
341 Arguments:
342 tv1 the first time
343 tv2 the second time
344
345 Returns: -1, 0, or +1
346 */
347
348 int
349 exim_tvcmp(struct timeval *t1, struct timeval *t2)
350 {
351 if (t1->tv_sec > t2->tv_sec) return +1;
352 if (t1->tv_sec < t2->tv_sec) return -1;
353 if (t1->tv_usec > t2->tv_usec) return +1;
354 if (t1->tv_usec < t2->tv_usec) return -1;
355 return 0;
356 }
357
358
359
360
361 /*************************************************
362 * Clock tick wait function *
363 *************************************************/
364
365 /* Exim uses a time + a pid to generate a unique identifier in two places: its
366 message IDs, and in file names for maildir deliveries. Because some OS now
367 re-use pids within the same second, sub-second times are now being used.
368 However, for absolute certaintly, we must ensure the clock has ticked before
369 allowing the relevant process to complete. At the time of implementation of
370 this code (February 2003), the speed of processors is such that the clock will
371 invariably have ticked already by the time a process has done its job. This
372 function prepares for the time when things are faster - and it also copes with
373 clocks that go backwards.
374
375 Arguments:
376 then_tv A timeval which was used to create uniqueness; its usec field
377 has been rounded down to the value of the resolution.
378 We want to be sure the current time is greater than this.
379 resolution The resolution that was used to divide the microseconds
380 (1 for maildir, larger for message ids)
381
382 Returns: nothing
383 */
384
385 void
386 exim_wait_tick(struct timeval *then_tv, int resolution)
387 {
388 struct timeval now_tv;
389 long int now_true_usec;
390
391 (void)gettimeofday(&now_tv, NULL);
392 now_true_usec = now_tv.tv_usec;
393 now_tv.tv_usec = (now_true_usec/resolution) * resolution;
394
395 if (exim_tvcmp(&now_tv, then_tv) <= 0)
396 {
397 struct itimerval itval;
398 itval.it_interval.tv_sec = 0;
399 itval.it_interval.tv_usec = 0;
400 itval.it_value.tv_sec = then_tv->tv_sec - now_tv.tv_sec;
401 itval.it_value.tv_usec = then_tv->tv_usec + resolution - now_true_usec;
402
403 /* We know that, overall, "now" is less than or equal to "then". Therefore, a
404 negative value for the microseconds is possible only in the case when "now"
405 is more than a second less than "then". That means that itval.it_value.tv_sec
406 is greater than zero. The following correction is therefore safe. */
407
408 if (itval.it_value.tv_usec < 0)
409 {
410 itval.it_value.tv_usec += 1000000;
411 itval.it_value.tv_sec -= 1;
412 }
413
414 DEBUG(D_transport|D_receive)
415 {
416 if (!running_in_test_harness)
417 {
418 debug_printf("tick check: " TIME_T_FMT ".%06lu " TIME_T_FMT ".%06lu\n",
419 then_tv->tv_sec, (long) then_tv->tv_usec,
420 now_tv.tv_sec, (long) now_tv.tv_usec);
421 debug_printf("waiting " TIME_T_FMT ".%06lu\n",
422 itval.it_value.tv_sec, (long) itval.it_value.tv_usec);
423 }
424 }
425
426 milliwait(&itval);
427 }
428 }
429
430
431
432
433 /*************************************************
434 * Call fopen() with umask 777 and adjust mode *
435 *************************************************/
436
437 /* Exim runs with umask(0) so that files created with open() have the mode that
438 is specified in the open() call. However, there are some files, typically in
439 the spool directory, that are created with fopen(). They end up world-writeable
440 if no precautions are taken. Although the spool directory is not accessible to
441 the world, this is an untidiness. So this is a wrapper function for fopen()
442 that sorts out the mode of the created file.
443
444 Arguments:
445 filename the file name
446 options the fopen() options
447 mode the required mode
448
449 Returns: the fopened FILE or NULL
450 */
451
452 FILE *
453 modefopen(const uschar *filename, const char *options, mode_t mode)
454 {
455 mode_t saved_umask = umask(0777);
456 FILE *f = Ufopen(filename, options);
457 (void)umask(saved_umask);
458 if (f != NULL) (void)fchmod(fileno(f), mode);
459 return f;
460 }
461
462
463
464
465 /*************************************************
466 * Ensure stdin, stdout, and stderr exist *
467 *************************************************/
468
469 /* Some operating systems grumble if an exec() happens without a standard
470 input, output, and error (fds 0, 1, 2) being defined. The worry is that some
471 file will be opened and will use these fd values, and then some other bit of
472 code will assume, for example, that it can write error messages to stderr.
473 This function ensures that fds 0, 1, and 2 are open if they do not already
474 exist, by connecting them to /dev/null.
475
476 This function is also used to ensure that std{in,out,err} exist at all times,
477 so that if any library that Exim calls tries to use them, it doesn't crash.
478
479 Arguments: None
480 Returns: Nothing
481 */
482
483 void
484 exim_nullstd(void)
485 {
486 int i;
487 int devnull = -1;
488 struct stat statbuf;
489 for (i = 0; i <= 2; i++)
490 {
491 if (fstat(i, &statbuf) < 0 && errno == EBADF)
492 {
493 if (devnull < 0) devnull = open("/dev/null", O_RDWR);
494 if (devnull < 0) log_write(0, LOG_MAIN|LOG_PANIC_DIE, "%s",
495 string_open_failed(errno, "/dev/null"));
496 if (devnull != i) (void)dup2(devnull, i);
497 }
498 }
499 if (devnull > 2) (void)close(devnull);
500 }
501
502
503
504
505 /*************************************************
506 * Close unwanted file descriptors for delivery *
507 *************************************************/
508
509 /* This function is called from a new process that has been forked to deliver
510 an incoming message, either directly, or using exec.
511
512 We want any smtp input streams to be closed in this new process. However, it
513 has been observed that using fclose() here causes trouble. When reading in -bS
514 input, duplicate copies of messages have been seen. The files will be sharing a
515 file pointer with the parent process, and it seems that fclose() (at least on
516 some systems - I saw this on Solaris 2.5.1) messes with that file pointer, at
517 least sometimes. Hence we go for closing the underlying file descriptors.
518
519 If TLS is active, we want to shut down the TLS library, but without molesting
520 the parent's SSL connection.
521
522 For delivery of a non-SMTP message, we want to close stdin and stdout (and
523 stderr unless debugging) because the calling process might have set them up as
524 pipes and be waiting for them to close before it waits for the submission
525 process to terminate. If they aren't closed, they hold up the calling process
526 until the initial delivery process finishes, which is not what we want.
527
528 Exception: We do want it for synchronous delivery!
529
530 And notwithstanding all the above, if D_resolver is set, implying resolver
531 debugging, leave stdout open, because that's where the resolver writes its
532 debugging output.
533
534 When we close stderr (which implies we've also closed stdout), we also get rid
535 of any controlling terminal.
536
537 Arguments: None
538 Returns: Nothing
539 */
540
541 static void
542 close_unwanted(void)
543 {
544 if (smtp_input)
545 {
546 #ifdef SUPPORT_TLS
547 tls_close(TRUE, FALSE); /* Shut down the TLS library */
548 #endif
549 (void)close(fileno(smtp_in));
550 (void)close(fileno(smtp_out));
551 smtp_in = NULL;
552 }
553 else
554 {
555 (void)close(0); /* stdin */
556 if ((debug_selector & D_resolver) == 0) (void)close(1); /* stdout */
557 if (debug_selector == 0) /* stderr */
558 {
559 if (!synchronous_delivery)
560 {
561 (void)close(2);
562 log_stderr = NULL;
563 }
564 (void)setsid();
565 }
566 }
567 }
568
569
570
571
572 /*************************************************
573 * Set uid and gid *
574 *************************************************/
575
576 /* This function sets a new uid and gid permanently, optionally calling
577 initgroups() to set auxiliary groups. There are some special cases when running
578 Exim in unprivileged modes. In these situations the effective uid will not be
579 root; if we already have the right effective uid/gid, and don't need to
580 initialize any groups, leave things as they are.
581
582 Arguments:
583 uid the uid
584 gid the gid
585 igflag TRUE if initgroups() wanted
586 msg text to use in debugging output and failure log
587
588 Returns: nothing; bombs out on failure
589 */
590
591 void
592 exim_setugid(uid_t uid, gid_t gid, BOOL igflag, uschar *msg)
593 {
594 uid_t euid = geteuid();
595 gid_t egid = getegid();
596
597 if (euid == root_uid || euid != uid || egid != gid || igflag)
598 {
599 /* At least one OS returns +1 for initgroups failure, so just check for
600 non-zero. */
601
602 if (igflag)
603 {
604 struct passwd *pw = getpwuid(uid);
605 if (pw != NULL)
606 {
607 if (initgroups(pw->pw_name, gid) != 0)
608 log_write(0,LOG_MAIN|LOG_PANIC_DIE,"initgroups failed for uid=%ld: %s",
609 (long int)uid, strerror(errno));
610 }
611 else log_write(0, LOG_MAIN|LOG_PANIC_DIE, "cannot run initgroups(): "
612 "no passwd entry for uid=%ld", (long int)uid);
613 }
614
615 if (setgid(gid) < 0 || setuid(uid) < 0)
616 {
617 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "unable to set gid=%ld or uid=%ld "
618 "(euid=%ld): %s", (long int)gid, (long int)uid, (long int)euid, msg);
619 }
620 }
621
622 /* Debugging output included uid/gid and all groups */
623
624 DEBUG(D_uid)
625 {
626 int group_count, save_errno;
627 gid_t group_list[NGROUPS_MAX];
628 debug_printf("changed uid/gid: %s\n uid=%ld gid=%ld pid=%ld\n", msg,
629 (long int)geteuid(), (long int)getegid(), (long int)getpid());
630 group_count = getgroups(NGROUPS_MAX, group_list);
631 save_errno = errno;
632 debug_printf(" auxiliary group list:");
633 if (group_count > 0)
634 {
635 int i;
636 for (i = 0; i < group_count; i++) debug_printf(" %d", (int)group_list[i]);
637 }
638 else if (group_count < 0)
639 debug_printf(" <error: %s>", strerror(save_errno));
640 else debug_printf(" <none>");
641 debug_printf("\n");
642 }
643 }
644
645
646
647
648 /*************************************************
649 * Exit point *
650 *************************************************/
651
652 /* Exim exits via this function so that it always clears up any open
653 databases.
654
655 Arguments:
656 rc return code
657
658 Returns: does not return
659 */
660
661 void
662 exim_exit(int rc)
663 {
664 search_tidyup();
665 DEBUG(D_any)
666 debug_printf(">>>>>>>>>>>>>>>> Exim pid=%d terminating with rc=%d "
667 ">>>>>>>>>>>>>>>>\n", (int)getpid(), 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 /* This function is called for -bV/--version and for -d to output the optional
747 features of the current Exim binary.
748
749 Arguments: a FILE for printing
750 Returns: nothing
751 */
752
753 static void
754 show_whats_supported(FILE *f)
755 {
756 auth_info *authi;
757
758 #ifdef DB_VERSION_STRING
759 fprintf(f, "Berkeley DB: %s\n", DB_VERSION_STRING);
760 #elif defined(BTREEVERSION) && defined(HASHVERSION)
761 #ifdef USE_DB
762 fprintf(f, "Probably Berkeley DB version 1.8x (native mode)\n");
763 #else
764 fprintf(f, "Probably Berkeley DB version 1.8x (compatibility mode)\n");
765 #endif
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 fprintf(f, "Support for:");
779 #ifdef SUPPORT_CRYPTEQ
780 fprintf(f, " crypteq");
781 #endif
782 #if HAVE_ICONV
783 fprintf(f, " iconv()");
784 #endif
785 #if HAVE_IPV6
786 fprintf(f, " IPv6");
787 #endif
788 #ifdef HAVE_SETCLASSRESOURCES
789 fprintf(f, " use_setclassresources");
790 #endif
791 #ifdef SUPPORT_PAM
792 fprintf(f, " PAM");
793 #endif
794 #ifdef EXIM_PERL
795 fprintf(f, " Perl");
796 #endif
797 #ifdef EXPAND_DLFUNC
798 fprintf(f, " Expand_dlfunc");
799 #endif
800 #ifdef USE_TCP_WRAPPERS
801 fprintf(f, " TCPwrappers");
802 #endif
803 #ifdef SUPPORT_TLS
804 #ifdef USE_GNUTLS
805 fprintf(f, " GnuTLS");
806 #else
807 fprintf(f, " OpenSSL");
808 #endif
809 #endif
810 #ifdef SUPPORT_TRANSLATE_IP_ADDRESS
811 fprintf(f, " translate_ip_address");
812 #endif
813 #ifdef SUPPORT_MOVE_FROZEN_MESSAGES
814 fprintf(f, " move_frozen_messages");
815 #endif
816 #ifdef WITH_CONTENT_SCAN
817 fprintf(f, " Content_Scanning");
818 #endif
819 #ifndef DISABLE_DKIM
820 fprintf(f, " DKIM");
821 #endif
822 #ifndef DISABLE_DNSSEC
823 fprintf(f, " DNSSEC");
824 #endif
825 #ifndef DISABLE_EVENT
826 fprintf(f, " Event");
827 #endif
828 #ifdef SUPPORT_I18N
829 fprintf(f, " I18N");
830 #endif
831 #ifndef DISABLE_OCSP
832 fprintf(f, " OCSP");
833 #endif
834 #ifndef DISABLE_PRDR
835 fprintf(f, " PRDR");
836 #endif
837 #ifdef SUPPORT_PROXY
838 fprintf(f, " PROXY");
839 #endif
840 #ifdef SUPPORT_SOCKS
841 fprintf(f, " SOCKS");
842 #endif
843 #ifdef EXPERIMENTAL_LMDB
844 fprintf(f, " Experimental_LMDB");
845 #endif
846 #ifdef EXPERIMENTAL_SPF
847 fprintf(f, " Experimental_SPF");
848 #endif
849 #ifdef EXPERIMENTAL_SRS
850 fprintf(f, " Experimental_SRS");
851 #endif
852 #ifdef EXPERIMENTAL_BRIGHTMAIL
853 fprintf(f, " Experimental_Brightmail");
854 #endif
855 #ifdef EXPERIMENTAL_DANE
856 fprintf(f, " Experimental_DANE");
857 #endif
858 #ifdef EXPERIMENTAL_DCC
859 fprintf(f, " Experimental_DCC");
860 #endif
861 #ifdef EXPERIMENTAL_DMARC
862 fprintf(f, " Experimental_DMARC");
863 #endif
864 #ifdef EXPERIMENTAL_DSN_INFO
865 fprintf(f, " Experimental_DSN_info");
866 #endif
867 fprintf(f, "\n");
868
869 fprintf(f, "Lookups (built-in):");
870 #if defined(LOOKUP_LSEARCH) && LOOKUP_LSEARCH!=2
871 fprintf(f, " lsearch wildlsearch nwildlsearch iplsearch");
872 #endif
873 #if defined(LOOKUP_CDB) && LOOKUP_CDB!=2
874 fprintf(f, " cdb");
875 #endif
876 #if defined(LOOKUP_DBM) && LOOKUP_DBM!=2
877 fprintf(f, " dbm dbmjz dbmnz");
878 #endif
879 #if defined(LOOKUP_DNSDB) && LOOKUP_DNSDB!=2
880 fprintf(f, " dnsdb");
881 #endif
882 #if defined(LOOKUP_DSEARCH) && LOOKUP_DSEARCH!=2
883 fprintf(f, " dsearch");
884 #endif
885 #if defined(LOOKUP_IBASE) && LOOKUP_IBASE!=2
886 fprintf(f, " ibase");
887 #endif
888 #if defined(LOOKUP_LDAP) && LOOKUP_LDAP!=2
889 fprintf(f, " ldap ldapdn ldapm");
890 #endif
891 #ifdef EXPERIMENTAL_LMDB
892 fprintf(f, " lmdb");
893 #endif
894 #if defined(LOOKUP_MYSQL) && LOOKUP_MYSQL!=2
895 fprintf(f, " mysql");
896 #endif
897 #if defined(LOOKUP_NIS) && LOOKUP_NIS!=2
898 fprintf(f, " nis nis0");
899 #endif
900 #if defined(LOOKUP_NISPLUS) && LOOKUP_NISPLUS!=2
901 fprintf(f, " nisplus");
902 #endif
903 #if defined(LOOKUP_ORACLE) && LOOKUP_ORACLE!=2
904 fprintf(f, " oracle");
905 #endif
906 #if defined(LOOKUP_PASSWD) && LOOKUP_PASSWD!=2
907 fprintf(f, " passwd");
908 #endif
909 #if defined(LOOKUP_PGSQL) && LOOKUP_PGSQL!=2
910 fprintf(f, " pgsql");
911 #endif
912 #if defined(LOOKUP_REDIS) && LOOKUP_REDIS!=2
913 fprintf(f, " redis");
914 #endif
915 #if defined(LOOKUP_SQLITE) && LOOKUP_SQLITE!=2
916 fprintf(f, " sqlite");
917 #endif
918 #if defined(LOOKUP_TESTDB) && LOOKUP_TESTDB!=2
919 fprintf(f, " testdb");
920 #endif
921 #if defined(LOOKUP_WHOSON) && LOOKUP_WHOSON!=2
922 fprintf(f, " whoson");
923 #endif
924 fprintf(f, "\n");
925
926 fprintf(f, "Authenticators:");
927 #ifdef AUTH_CRAM_MD5
928 fprintf(f, " cram_md5");
929 #endif
930 #ifdef AUTH_CYRUS_SASL
931 fprintf(f, " cyrus_sasl");
932 #endif
933 #ifdef AUTH_DOVECOT
934 fprintf(f, " dovecot");
935 #endif
936 #ifdef AUTH_GSASL
937 fprintf(f, " gsasl");
938 #endif
939 #ifdef AUTH_HEIMDAL_GSSAPI
940 fprintf(f, " heimdal_gssapi");
941 #endif
942 #ifdef AUTH_PLAINTEXT
943 fprintf(f, " plaintext");
944 #endif
945 #ifdef AUTH_SPA
946 fprintf(f, " spa");
947 #endif
948 #ifdef AUTH_TLS
949 fprintf(f, " tls");
950 #endif
951 fprintf(f, "\n");
952
953 fprintf(f, "Routers:");
954 #ifdef ROUTER_ACCEPT
955 fprintf(f, " accept");
956 #endif
957 #ifdef ROUTER_DNSLOOKUP
958 fprintf(f, " dnslookup");
959 #endif
960 #ifdef ROUTER_IPLITERAL
961 fprintf(f, " ipliteral");
962 #endif
963 #ifdef ROUTER_IPLOOKUP
964 fprintf(f, " iplookup");
965 #endif
966 #ifdef ROUTER_MANUALROUTE
967 fprintf(f, " manualroute");
968 #endif
969 #ifdef ROUTER_QUERYPROGRAM
970 fprintf(f, " queryprogram");
971 #endif
972 #ifdef ROUTER_REDIRECT
973 fprintf(f, " redirect");
974 #endif
975 fprintf(f, "\n");
976
977 fprintf(f, "Transports:");
978 #ifdef TRANSPORT_APPENDFILE
979 fprintf(f, " appendfile");
980 #ifdef SUPPORT_MAILDIR
981 fprintf(f, "/maildir");
982 #endif
983 #ifdef SUPPORT_MAILSTORE
984 fprintf(f, "/mailstore");
985 #endif
986 #ifdef SUPPORT_MBX
987 fprintf(f, "/mbx");
988 #endif
989 #endif
990 #ifdef TRANSPORT_AUTOREPLY
991 fprintf(f, " autoreply");
992 #endif
993 #ifdef TRANSPORT_LMTP
994 fprintf(f, " lmtp");
995 #endif
996 #ifdef TRANSPORT_PIPE
997 fprintf(f, " pipe");
998 #endif
999 #ifdef TRANSPORT_SMTP
1000 fprintf(f, " smtp");
1001 #endif
1002 fprintf(f, "\n");
1003
1004 if (fixed_never_users[0] > 0)
1005 {
1006 int i;
1007 fprintf(f, "Fixed never_users: ");
1008 for (i = 1; i <= (int)fixed_never_users[0] - 1; i++)
1009 fprintf(f, "%d:", (unsigned int)fixed_never_users[i]);
1010 fprintf(f, "%d\n", (unsigned int)fixed_never_users[i]);
1011 }
1012
1013 fprintf(f, "Size of off_t: " SIZE_T_FMT "\n", sizeof(off_t));
1014
1015 /* Everything else is details which are only worth reporting when debugging.
1016 Perhaps the tls_version_report should move into this too. */
1017 DEBUG(D_any) do {
1018
1019 int i;
1020
1021 /* clang defines __GNUC__ (at least, for me) so test for it first */
1022 #if defined(__clang__)
1023 fprintf(f, "Compiler: CLang [%s]\n", __clang_version__);
1024 #elif defined(__GNUC__)
1025 fprintf(f, "Compiler: GCC [%s]\n",
1026 # ifdef __VERSION__
1027 __VERSION__
1028 # else
1029 "? unknown version ?"
1030 # endif
1031 );
1032 #else
1033 fprintf(f, "Compiler: <unknown>\n");
1034 #endif
1035
1036 #ifdef __GLIBC__
1037 fprintf(f, "Library version: Glibc: Compile: %d.%d\n",
1038 __GLIBC__, __GLIBC_MINOR__);
1039 if (__GLIBC_PREREQ(2, 1))
1040 fprintf(f, " Runtime: %s\n",
1041 gnu_get_libc_version());
1042 #endif
1043
1044 #ifdef SUPPORT_TLS
1045 tls_version_report(f);
1046 #endif
1047 #ifdef SUPPORT_I18N
1048 utf8_version_report(f);
1049 #endif
1050
1051 for (authi = auths_available; *authi->driver_name != '\0'; ++authi)
1052 if (authi->version_report)
1053 (*authi->version_report)(f);
1054
1055 /* PCRE_PRERELEASE is either defined and empty or a bare sequence of
1056 characters; unless it's an ancient version of PCRE in which case it
1057 is not defined. */
1058 #ifndef PCRE_PRERELEASE
1059 # define PCRE_PRERELEASE
1060 #endif
1061 #define QUOTE(X) #X
1062 #define EXPAND_AND_QUOTE(X) QUOTE(X)
1063 fprintf(f, "Library version: PCRE: Compile: %d.%d%s\n"
1064 " Runtime: %s\n",
1065 PCRE_MAJOR, PCRE_MINOR,
1066 EXPAND_AND_QUOTE(PCRE_PRERELEASE) "",
1067 pcre_version());
1068 #undef QUOTE
1069 #undef EXPAND_AND_QUOTE
1070
1071 init_lookup_list();
1072 for (i = 0; i < lookup_list_count; i++)
1073 if (lookup_list[i]->version_report)
1074 lookup_list[i]->version_report(f);
1075
1076 #ifdef WHITELIST_D_MACROS
1077 fprintf(f, "WHITELIST_D_MACROS: \"%s\"\n", WHITELIST_D_MACROS);
1078 #else
1079 fprintf(f, "WHITELIST_D_MACROS unset\n");
1080 #endif
1081 #ifdef TRUSTED_CONFIG_LIST
1082 fprintf(f, "TRUSTED_CONFIG_LIST: \"%s\"\n", TRUSTED_CONFIG_LIST);
1083 #else
1084 fprintf(f, "TRUSTED_CONFIG_LIST unset\n");
1085 #endif
1086
1087 } while (0);
1088 }
1089
1090
1091 /*************************************************
1092 * Show auxiliary information about Exim *
1093 *************************************************/
1094
1095 static void
1096 show_exim_information(enum commandline_info request, FILE *stream)
1097 {
1098 const uschar **pp;
1099
1100 switch(request)
1101 {
1102 case CMDINFO_NONE:
1103 fprintf(stream, "Oops, something went wrong.\n");
1104 return;
1105 case CMDINFO_HELP:
1106 fprintf(stream,
1107 "The -bI: flag takes a string indicating which information to provide.\n"
1108 "If the string is not recognised, you'll get this help (on stderr).\n"
1109 "\n"
1110 " exim -bI:help this information\n"
1111 " exim -bI:dscp dscp value keywords known\n"
1112 " exim -bI:sieve list of supported sieve extensions, one per line.\n"
1113 );
1114 return;
1115 case CMDINFO_SIEVE:
1116 for (pp = exim_sieve_extension_list; *pp; ++pp)
1117 fprintf(stream, "%s\n", *pp);
1118 return;
1119 case CMDINFO_DSCP:
1120 dscp_list_to_stream(stream);
1121 return;
1122 }
1123 }
1124
1125
1126 /*************************************************
1127 * Quote a local part *
1128 *************************************************/
1129
1130 /* This function is used when a sender address or a From: or Sender: header
1131 line is being created from the caller's login, or from an authenticated_id. It
1132 applies appropriate quoting rules for a local part.
1133
1134 Argument: the local part
1135 Returns: the local part, quoted if necessary
1136 */
1137
1138 uschar *
1139 local_part_quote(uschar *lpart)
1140 {
1141 BOOL needs_quote = FALSE;
1142 int size, ptr;
1143 uschar *yield;
1144 uschar *t;
1145
1146 for (t = lpart; !needs_quote && *t != 0; t++)
1147 {
1148 needs_quote = !isalnum(*t) && strchr("!#$%&'*+-/=?^_`{|}~", *t) == NULL &&
1149 (*t != '.' || t == lpart || t[1] == 0);
1150 }
1151
1152 if (!needs_quote) return lpart;
1153
1154 size = ptr = 0;
1155 yield = string_catn(NULL, &size, &ptr, US"\"", 1);
1156
1157 for (;;)
1158 {
1159 uschar *nq = US Ustrpbrk(lpart, "\\\"");
1160 if (nq == NULL)
1161 {
1162 yield = string_cat(yield, &size, &ptr, lpart);
1163 break;
1164 }
1165 yield = string_catn(yield, &size, &ptr, lpart, nq - lpart);
1166 yield = string_catn(yield, &size, &ptr, US"\\", 1);
1167 yield = string_catn(yield, &size, &ptr, nq, 1);
1168 lpart = nq + 1;
1169 }
1170
1171 yield = string_catn(yield, &size, &ptr, US"\"", 1);
1172 yield[ptr] = 0;
1173 return yield;
1174 }
1175
1176
1177
1178 #ifdef USE_READLINE
1179 /*************************************************
1180 * Load readline() functions *
1181 *************************************************/
1182
1183 /* This function is called from testing executions that read data from stdin,
1184 but only when running as the calling user. Currently, only -be does this. The
1185 function loads the readline() function library and passes back the functions.
1186 On some systems, it needs the curses library, so load that too, but try without
1187 it if loading fails. All this functionality has to be requested at build time.
1188
1189 Arguments:
1190 fn_readline_ptr pointer to where to put the readline pointer
1191 fn_addhist_ptr pointer to where to put the addhistory function
1192
1193 Returns: the dlopen handle or NULL on failure
1194 */
1195
1196 static void *
1197 set_readline(char * (**fn_readline_ptr)(const char *),
1198 void (**fn_addhist_ptr)(const char *))
1199 {
1200 void *dlhandle;
1201 void *dlhandle_curses = dlopen("libcurses." DYNLIB_FN_EXT, RTLD_GLOBAL|RTLD_LAZY);
1202
1203 dlhandle = dlopen("libreadline." DYNLIB_FN_EXT, RTLD_GLOBAL|RTLD_NOW);
1204 if (dlhandle_curses != NULL) dlclose(dlhandle_curses);
1205
1206 if (dlhandle != NULL)
1207 {
1208 /* Checked manual pages; at least in GNU Readline 6.1, the prototypes are:
1209 * char * readline (const char *prompt);
1210 * void add_history (const char *string);
1211 */
1212 *fn_readline_ptr = (char *(*)(const char*))dlsym(dlhandle, "readline");
1213 *fn_addhist_ptr = (void(*)(const char*))dlsym(dlhandle, "add_history");
1214 }
1215 else
1216 {
1217 DEBUG(D_any) debug_printf("failed to load readline: %s\n", dlerror());
1218 }
1219
1220 return dlhandle;
1221 }
1222 #endif
1223
1224
1225
1226 /*************************************************
1227 * Get a line from stdin for testing things *
1228 *************************************************/
1229
1230 /* This function is called when running tests that can take a number of lines
1231 of input (for example, -be and -bt). It handles continuations and trailing
1232 spaces. And prompting and a blank line output on eof. If readline() is in use,
1233 the arguments are non-NULL and provide the relevant functions.
1234
1235 Arguments:
1236 fn_readline readline function or NULL
1237 fn_addhist addhist function or NULL
1238
1239 Returns: pointer to dynamic memory, or NULL at end of file
1240 */
1241
1242 static uschar *
1243 get_stdinput(char *(*fn_readline)(const char *), void(*fn_addhist)(const char *))
1244 {
1245 int i;
1246 int size = 0;
1247 int ptr = 0;
1248 uschar *yield = NULL;
1249
1250 if (fn_readline == NULL) { printf("> "); fflush(stdout); }
1251
1252 for (i = 0;; i++)
1253 {
1254 uschar buffer[1024];
1255 uschar *p, *ss;
1256
1257 #ifdef USE_READLINE
1258 char *readline_line = NULL;
1259 if (fn_readline != NULL)
1260 {
1261 if ((readline_line = fn_readline((i > 0)? "":"> ")) == NULL) break;
1262 if (*readline_line != 0 && fn_addhist != NULL) fn_addhist(readline_line);
1263 p = US readline_line;
1264 }
1265 else
1266 #endif
1267
1268 /* readline() not in use */
1269
1270 {
1271 if (Ufgets(buffer, sizeof(buffer), stdin) == NULL) break;
1272 p = buffer;
1273 }
1274
1275 /* Handle the line */
1276
1277 ss = p + (int)Ustrlen(p);
1278 while (ss > p && isspace(ss[-1])) ss--;
1279
1280 if (i > 0)
1281 {
1282 while (p < ss && isspace(*p)) p++; /* leading space after cont */
1283 }
1284
1285 yield = string_catn(yield, &size, &ptr, p, ss - p);
1286
1287 #ifdef USE_READLINE
1288 if (fn_readline != NULL) free(readline_line);
1289 #endif
1290
1291 /* yield can only be NULL if ss==p */
1292 if (ss == p || yield[ptr-1] != '\\')
1293 {
1294 if (yield) yield[ptr] = 0;
1295 break;
1296 }
1297 yield[--ptr] = 0;
1298 }
1299
1300 if (yield == NULL) printf("\n");
1301 return yield;
1302 }
1303
1304
1305
1306 /*************************************************
1307 * Output usage information for the program *
1308 *************************************************/
1309
1310 /* This function is called when there are no recipients
1311 or a specific --help argument was added.
1312
1313 Arguments:
1314 progname information on what name we were called by
1315
1316 Returns: DOES NOT RETURN
1317 */
1318
1319 static void
1320 exim_usage(uschar *progname)
1321 {
1322
1323 /* Handle specific program invocation varients */
1324 if (Ustrcmp(progname, US"-mailq") == 0)
1325 {
1326 fprintf(stderr,
1327 "mailq - list the contents of the mail queue\n\n"
1328 "For a list of options, see the Exim documentation.\n");
1329 exit(EXIT_FAILURE);
1330 }
1331
1332 /* Generic usage - we output this whatever happens */
1333 fprintf(stderr,
1334 "Exim is a Mail Transfer Agent. It is normally called by Mail User Agents,\n"
1335 "not directly from a shell command line. Options and/or arguments control\n"
1336 "what it does when called. For a list of options, see the Exim documentation.\n");
1337
1338 exit(EXIT_FAILURE);
1339 }
1340
1341
1342
1343 /*************************************************
1344 * Validate that the macros given are okay *
1345 *************************************************/
1346
1347 /* Typically, Exim will drop privileges if macros are supplied. In some
1348 cases, we want to not do so.
1349
1350 Arguments: opt_D_used - true if the commandline had a "-D" option
1351 Returns: true if trusted, false otherwise
1352 */
1353
1354 static BOOL
1355 macros_trusted(BOOL opt_D_used)
1356 {
1357 #ifdef WHITELIST_D_MACROS
1358 macro_item *m;
1359 uschar *whitelisted, *end, *p, **whites, **w;
1360 int white_count, i, n;
1361 size_t len;
1362 BOOL prev_char_item, found;
1363 #endif
1364
1365 if (!opt_D_used)
1366 return TRUE;
1367 #ifndef WHITELIST_D_MACROS
1368 return FALSE;
1369 #else
1370
1371 /* We only trust -D overrides for some invoking users:
1372 root, the exim run-time user, the optional config owner user.
1373 I don't know why config-owner would be needed, but since they can own the
1374 config files anyway, there's no security risk to letting them override -D. */
1375 if ( ! ((real_uid == root_uid)
1376 || (real_uid == exim_uid)
1377 #ifdef CONFIGURE_OWNER
1378 || (real_uid == config_uid)
1379 #endif
1380 ))
1381 {
1382 debug_printf("macros_trusted rejecting macros for uid %d\n", (int) real_uid);
1383 return FALSE;
1384 }
1385
1386 /* Get a list of macros which are whitelisted */
1387 whitelisted = string_copy_malloc(US WHITELIST_D_MACROS);
1388 prev_char_item = FALSE;
1389 white_count = 0;
1390 for (p = whitelisted; *p != '\0'; ++p)
1391 {
1392 if (*p == ':' || isspace(*p))
1393 {
1394 *p = '\0';
1395 if (prev_char_item)
1396 ++white_count;
1397 prev_char_item = FALSE;
1398 continue;
1399 }
1400 if (!prev_char_item)
1401 prev_char_item = TRUE;
1402 }
1403 end = p;
1404 if (prev_char_item)
1405 ++white_count;
1406 if (!white_count)
1407 return FALSE;
1408 whites = store_malloc(sizeof(uschar *) * (white_count+1));
1409 for (p = whitelisted, i = 0; (p != end) && (i < white_count); ++p)
1410 {
1411 if (*p != '\0')
1412 {
1413 whites[i++] = p;
1414 if (i == white_count)
1415 break;
1416 while (*p != '\0' && p < end)
1417 ++p;
1418 }
1419 }
1420 whites[i] = NULL;
1421
1422 /* The list of commandline macros should be very short.
1423 Accept the N*M complexity. */
1424 for (m = macros; m; m = m->next) if (m->command_line)
1425 {
1426 found = FALSE;
1427 for (w = whites; *w; ++w)
1428 if (Ustrcmp(*w, m->name) == 0)
1429 {
1430 found = TRUE;
1431 break;
1432 }
1433 if (!found)
1434 return FALSE;
1435 if (m->replacement == NULL)
1436 continue;
1437 len = Ustrlen(m->replacement);
1438 if (len == 0)
1439 continue;
1440 n = pcre_exec(regex_whitelisted_macro, NULL, CS m->replacement, len,
1441 0, PCRE_EOPT, NULL, 0);
1442 if (n < 0)
1443 {
1444 if (n != PCRE_ERROR_NOMATCH)
1445 debug_printf("macros_trusted checking %s returned %d\n", m->name, n);
1446 return FALSE;
1447 }
1448 }
1449 DEBUG(D_any) debug_printf("macros_trusted overridden to true by whitelisting\n");
1450 return TRUE;
1451 #endif
1452 }
1453
1454
1455 /*************************************************
1456 * Entry point and high-level code *
1457 *************************************************/
1458
1459 /* Entry point for the Exim mailer. Analyse the arguments and arrange to take
1460 the appropriate action. All the necessary functions are present in the one
1461 binary. I originally thought one should split it up, but it turns out that so
1462 much of the apparatus is needed in each chunk that one might as well just have
1463 it all available all the time, which then makes the coding easier as well.
1464
1465 Arguments:
1466 argc count of entries in argv
1467 argv argument strings, with argv[0] being the program name
1468
1469 Returns: EXIT_SUCCESS if terminated successfully
1470 EXIT_FAILURE otherwise, except when a message has been sent
1471 to the sender, and -oee was given
1472 */
1473
1474 int
1475 main(int argc, char **cargv)
1476 {
1477 uschar **argv = USS cargv;
1478 int arg_receive_timeout = -1;
1479 int arg_smtp_receive_timeout = -1;
1480 int arg_error_handling = error_handling;
1481 int filter_sfd = -1;
1482 int filter_ufd = -1;
1483 int group_count;
1484 int i, rv;
1485 int list_queue_option = 0;
1486 int msg_action = 0;
1487 int msg_action_arg = -1;
1488 int namelen = (argv[0] == NULL)? 0 : Ustrlen(argv[0]);
1489 int queue_only_reason = 0;
1490 #ifdef EXIM_PERL
1491 int perl_start_option = 0;
1492 #endif
1493 int recipients_arg = argc;
1494 int sender_address_domain = 0;
1495 int test_retry_arg = -1;
1496 int test_rewrite_arg = -1;
1497 BOOL arg_queue_only = FALSE;
1498 BOOL bi_option = FALSE;
1499 BOOL checking = FALSE;
1500 BOOL count_queue = FALSE;
1501 BOOL expansion_test = FALSE;
1502 BOOL extract_recipients = FALSE;
1503 BOOL flag_G = FALSE;
1504 BOOL flag_n = FALSE;
1505 BOOL forced_delivery = FALSE;
1506 BOOL f_end_dot = FALSE;
1507 BOOL deliver_give_up = FALSE;
1508 BOOL list_queue = FALSE;
1509 BOOL list_options = FALSE;
1510 BOOL list_config = FALSE;
1511 BOOL local_queue_only;
1512 BOOL more = TRUE;
1513 BOOL one_msg_action = FALSE;
1514 BOOL opt_D_used = FALSE;
1515 BOOL queue_only_set = FALSE;
1516 BOOL receiving_message = TRUE;
1517 BOOL sender_ident_set = FALSE;
1518 BOOL session_local_queue_only;
1519 BOOL unprivileged;
1520 BOOL removed_privilege = FALSE;
1521 BOOL usage_wanted = FALSE;
1522 BOOL verify_address_mode = FALSE;
1523 BOOL verify_as_sender = FALSE;
1524 BOOL version_printed = FALSE;
1525 uschar *alias_arg = NULL;
1526 uschar *called_as = US"";
1527 uschar *cmdline_syslog_name = NULL;
1528 uschar *start_queue_run_id = NULL;
1529 uschar *stop_queue_run_id = NULL;
1530 uschar *expansion_test_message = NULL;
1531 uschar *ftest_domain = NULL;
1532 uschar *ftest_localpart = NULL;
1533 uschar *ftest_prefix = NULL;
1534 uschar *ftest_suffix = NULL;
1535 uschar *log_oneline = NULL;
1536 uschar *malware_test_file = NULL;
1537 uschar *real_sender_address;
1538 uschar *originator_home = US"/";
1539 size_t sz;
1540 void *reset_point;
1541
1542 struct passwd *pw;
1543 struct stat statbuf;
1544 pid_t passed_qr_pid = (pid_t)0;
1545 int passed_qr_pipe = -1;
1546 gid_t group_list[NGROUPS_MAX];
1547
1548 /* For the -bI: flag */
1549 enum commandline_info info_flag = CMDINFO_NONE;
1550 BOOL info_stdout = FALSE;
1551
1552 /* Possible options for -R and -S */
1553
1554 static uschar *rsopts[] = { US"f", US"ff", US"r", US"rf", US"rff" };
1555
1556 /* Need to define this in case we need to change the environment in order
1557 to get rid of a bogus time zone. We have to make it char rather than uschar
1558 because some OS define it in /usr/include/unistd.h. */
1559
1560 extern char **environ;
1561
1562 /* If the Exim user and/or group and/or the configuration file owner/group were
1563 defined by ref:name at build time, we must now find the actual uid/gid values.
1564 This is a feature to make the lives of binary distributors easier. */
1565
1566 #ifdef EXIM_USERNAME
1567 if (route_finduser(US EXIM_USERNAME, &pw, &exim_uid))
1568 {
1569 if (exim_uid == 0)
1570 {
1571 fprintf(stderr, "exim: refusing to run with uid 0 for \"%s\"\n",
1572 EXIM_USERNAME);
1573 exit(EXIT_FAILURE);
1574 }
1575 /* If ref:name uses a number as the name, route_finduser() returns
1576 TRUE with exim_uid set and pw coerced to NULL. */
1577 if (pw)
1578 exim_gid = pw->pw_gid;
1579 #ifndef EXIM_GROUPNAME
1580 else
1581 {
1582 fprintf(stderr,
1583 "exim: ref:name should specify a usercode, not a group.\n"
1584 "exim: can't let you get away with it unless you also specify a group.\n");
1585 exit(EXIT_FAILURE);
1586 }
1587 #endif
1588 }
1589 else
1590 {
1591 fprintf(stderr, "exim: failed to find uid for user name \"%s\"\n",
1592 EXIM_USERNAME);
1593 exit(EXIT_FAILURE);
1594 }
1595 #endif
1596
1597 #ifdef EXIM_GROUPNAME
1598 if (!route_findgroup(US EXIM_GROUPNAME, &exim_gid))
1599 {
1600 fprintf(stderr, "exim: failed to find gid for group name \"%s\"\n",
1601 EXIM_GROUPNAME);
1602 exit(EXIT_FAILURE);
1603 }
1604 #endif
1605
1606 #ifdef CONFIGURE_OWNERNAME
1607 if (!route_finduser(US CONFIGURE_OWNERNAME, NULL, &config_uid))
1608 {
1609 fprintf(stderr, "exim: failed to find uid for user name \"%s\"\n",
1610 CONFIGURE_OWNERNAME);
1611 exit(EXIT_FAILURE);
1612 }
1613 #endif
1614
1615 /* We default the system_filter_user to be the Exim run-time user, as a
1616 sane non-root value. */
1617 system_filter_uid = exim_uid;
1618
1619 #ifdef CONFIGURE_GROUPNAME
1620 if (!route_findgroup(US CONFIGURE_GROUPNAME, &config_gid))
1621 {
1622 fprintf(stderr, "exim: failed to find gid for group name \"%s\"\n",
1623 CONFIGURE_GROUPNAME);
1624 exit(EXIT_FAILURE);
1625 }
1626 #endif
1627
1628 /* In the Cygwin environment, some initialization used to need doing.
1629 It was fudged in by means of this macro; now no longer but we'll leave
1630 it in case of others. */
1631
1632 #ifdef OS_INIT
1633 OS_INIT
1634 #endif
1635
1636 /* Check a field which is patched when we are running Exim within its
1637 testing harness; do a fast initial check, and then the whole thing. */
1638
1639 running_in_test_harness =
1640 *running_status == '<' && Ustrcmp(running_status, "<<<testing>>>") == 0;
1641
1642 /* The C standard says that the equivalent of setlocale(LC_ALL, "C") is obeyed
1643 at the start of a program; however, it seems that some environments do not
1644 follow this. A "strange" locale can affect the formatting of timestamps, so we
1645 make quite sure. */
1646
1647 setlocale(LC_ALL, "C");
1648
1649 /* Set up the default handler for timing using alarm(). */
1650
1651 os_non_restarting_signal(SIGALRM, sigalrm_handler);
1652
1653 /* Ensure we have a buffer for constructing log entries. Use malloc directly,
1654 because store_malloc writes a log entry on failure. */
1655
1656 if (!(log_buffer = US malloc(LOG_BUFFER_SIZE)))
1657 {
1658 fprintf(stderr, "exim: failed to get store for log buffer\n");
1659 exit(EXIT_FAILURE);
1660 }
1661
1662 /* Initialize the default log options. */
1663
1664 bits_set(log_selector, log_selector_size, log_default);
1665
1666 /* Set log_stderr to stderr, provided that stderr exists. This gets reset to
1667 NULL when the daemon is run and the file is closed. We have to use this
1668 indirection, because some systems don't allow writing to the variable "stderr".
1669 */
1670
1671 if (fstat(fileno(stderr), &statbuf) >= 0) log_stderr = stderr;
1672
1673 /* Arrange for the PCRE regex library to use our store functions. Note that
1674 the normal calls are actually macros that add additional arguments for
1675 debugging purposes so we have to assign specially constructed functions here.
1676 The default is to use store in the stacking pool, but this is overridden in the
1677 regex_must_compile() function. */
1678
1679 pcre_malloc = function_store_get;
1680 pcre_free = function_dummy_free;
1681
1682 /* Ensure there is a big buffer for temporary use in several places. It is put
1683 in malloc store so that it can be freed for enlargement if necessary. */
1684
1685 big_buffer = store_malloc(big_buffer_size);
1686
1687 /* Set up the handler for the data request signal, and set the initial
1688 descriptive text. */
1689
1690 set_process_info("initializing");
1691 readconf_features();
1692 readconf_options();
1693 os_restarting_signal(SIGUSR1, usr1_handler);
1694
1695 /* SIGHUP is used to get the daemon to reconfigure. It gets set as appropriate
1696 in the daemon code. For the rest of Exim's uses, we ignore it. */
1697
1698 signal(SIGHUP, SIG_IGN);
1699
1700 /* We don't want to die on pipe errors as the code is written to handle
1701 the write error instead. */
1702
1703 signal(SIGPIPE, SIG_IGN);
1704
1705 /* Under some circumstance on some OS, Exim can get called with SIGCHLD
1706 set to SIG_IGN. This causes subprocesses that complete before the parent
1707 process waits for them not to hang around, so when Exim calls wait(), nothing
1708 is there. The wait() code has been made robust against this, but let's ensure
1709 that SIGCHLD is set to SIG_DFL, because it's tidier to wait and get a process
1710 ending status. We use sigaction rather than plain signal() on those OS where
1711 SA_NOCLDWAIT exists, because we want to be sure it is turned off. (There was a
1712 problem on AIX with this.) */
1713
1714 #ifdef SA_NOCLDWAIT
1715 {
1716 struct sigaction act;
1717 act.sa_handler = SIG_DFL;
1718 sigemptyset(&(act.sa_mask));
1719 act.sa_flags = 0;
1720 sigaction(SIGCHLD, &act, NULL);
1721 }
1722 #else
1723 signal(SIGCHLD, SIG_DFL);
1724 #endif
1725
1726 /* Save the arguments for use if we re-exec exim as a daemon after receiving
1727 SIGHUP. */
1728
1729 sighup_argv = argv;
1730
1731 /* Set up the version number. Set up the leading 'E' for the external form of
1732 message ids, set the pointer to the internal form, and initialize it to
1733 indicate no message being processed. */
1734
1735 version_init();
1736 message_id_option[0] = '-';
1737 message_id_external = message_id_option + 1;
1738 message_id_external[0] = 'E';
1739 message_id = message_id_external + 1;
1740 message_id[0] = 0;
1741
1742 /* Set the umask to zero so that any files Exim creates using open() are
1743 created with the modes that it specifies. NOTE: Files created with fopen() have
1744 a problem, which was not recognized till rather late (February 2006). With this
1745 umask, such files will be world writeable. (They are all content scanning files
1746 in the spool directory, which isn't world-accessible, so this is not a
1747 disaster, but it's untidy.) I don't want to change this overall setting,
1748 however, because it will interact badly with the open() calls. Instead, there's
1749 now a function called modefopen() that fiddles with the umask while calling
1750 fopen(). */
1751
1752 (void)umask(0);
1753
1754 /* Precompile the regular expression for matching a message id. Keep this in
1755 step with the code that generates ids in the accept.c module. We need to do
1756 this here, because the -M options check their arguments for syntactic validity
1757 using mac_ismsgid, which uses this. */
1758
1759 regex_ismsgid =
1760 regex_must_compile(US"^(?:[^\\W_]{6}-){2}[^\\W_]{2}$", FALSE, TRUE);
1761
1762 /* Precompile the regular expression that is used for matching an SMTP error
1763 code, possibly extended, at the start of an error message. Note that the
1764 terminating whitespace character is included. */
1765
1766 regex_smtp_code =
1767 regex_must_compile(US"^\\d\\d\\d\\s(?:\\d\\.\\d\\d?\\d?\\.\\d\\d?\\d?\\s)?",
1768 FALSE, TRUE);
1769
1770 #ifdef WHITELIST_D_MACROS
1771 /* Precompile the regular expression used to filter the content of macros
1772 given to -D for permissibility. */
1773
1774 regex_whitelisted_macro =
1775 regex_must_compile(US"^[A-Za-z0-9_/.-]*$", FALSE, TRUE);
1776 #endif
1777
1778 for (i = 0; i < REGEX_VARS; i++) regex_vars[i] = NULL;
1779
1780 /* If the program is called as "mailq" treat it as equivalent to "exim -bp";
1781 this seems to be a generally accepted convention, since one finds symbolic
1782 links called "mailq" in standard OS configurations. */
1783
1784 if ((namelen == 5 && Ustrcmp(argv[0], "mailq") == 0) ||
1785 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/mailq", 6) == 0))
1786 {
1787 list_queue = TRUE;
1788 receiving_message = FALSE;
1789 called_as = US"-mailq";
1790 }
1791
1792 /* If the program is called as "rmail" treat it as equivalent to
1793 "exim -i -oee", thus allowing UUCP messages to be input using non-SMTP mode,
1794 i.e. preventing a single dot on a line from terminating the message, and
1795 returning with zero return code, even in cases of error (provided an error
1796 message has been sent). */
1797
1798 if ((namelen == 5 && Ustrcmp(argv[0], "rmail") == 0) ||
1799 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/rmail", 6) == 0))
1800 {
1801 dot_ends = FALSE;
1802 called_as = US"-rmail";
1803 errors_sender_rc = EXIT_SUCCESS;
1804 }
1805
1806 /* If the program is called as "rsmtp" treat it as equivalent to "exim -bS";
1807 this is a smail convention. */
1808
1809 if ((namelen == 5 && Ustrcmp(argv[0], "rsmtp") == 0) ||
1810 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/rsmtp", 6) == 0))
1811 {
1812 smtp_input = smtp_batched_input = TRUE;
1813 called_as = US"-rsmtp";
1814 }
1815
1816 /* If the program is called as "runq" treat it as equivalent to "exim -q";
1817 this is a smail convention. */
1818
1819 if ((namelen == 4 && Ustrcmp(argv[0], "runq") == 0) ||
1820 (namelen > 4 && Ustrncmp(argv[0] + namelen - 5, "/runq", 5) == 0))
1821 {
1822 queue_interval = 0;
1823 receiving_message = FALSE;
1824 called_as = US"-runq";
1825 }
1826
1827 /* If the program is called as "newaliases" treat it as equivalent to
1828 "exim -bi"; this is a sendmail convention. */
1829
1830 if ((namelen == 10 && Ustrcmp(argv[0], "newaliases") == 0) ||
1831 (namelen > 10 && Ustrncmp(argv[0] + namelen - 11, "/newaliases", 11) == 0))
1832 {
1833 bi_option = TRUE;
1834 receiving_message = FALSE;
1835 called_as = US"-newaliases";
1836 }
1837
1838 /* Save the original effective uid for a couple of uses later. It should
1839 normally be root, but in some esoteric environments it may not be. */
1840
1841 original_euid = geteuid();
1842
1843 /* Get the real uid and gid. If the caller is root, force the effective uid/gid
1844 to be the same as the real ones. This makes a difference only if Exim is setuid
1845 (or setgid) to something other than root, which could be the case in some
1846 special configurations. */
1847
1848 real_uid = getuid();
1849 real_gid = getgid();
1850
1851 if (real_uid == root_uid)
1852 {
1853 rv = setgid(real_gid);
1854 if (rv)
1855 {
1856 fprintf(stderr, "exim: setgid(%ld) failed: %s\n",
1857 (long int)real_gid, strerror(errno));
1858 exit(EXIT_FAILURE);
1859 }
1860 rv = setuid(real_uid);
1861 if (rv)
1862 {
1863 fprintf(stderr, "exim: setuid(%ld) failed: %s\n",
1864 (long int)real_uid, strerror(errno));
1865 exit(EXIT_FAILURE);
1866 }
1867 }
1868
1869 /* If neither the original real uid nor the original euid was root, Exim is
1870 running in an unprivileged state. */
1871
1872 unprivileged = (real_uid != root_uid && original_euid != root_uid);
1873
1874 /* Scan the program's arguments. Some can be dealt with right away; others are
1875 simply recorded for checking and handling afterwards. Do a high-level switch
1876 on the second character (the one after '-'), to save some effort. */
1877
1878 for (i = 1; i < argc; i++)
1879 {
1880 BOOL badarg = FALSE;
1881 uschar *arg = argv[i];
1882 uschar *argrest;
1883 int switchchar;
1884
1885 /* An argument not starting with '-' is the start of a recipients list;
1886 break out of the options-scanning loop. */
1887
1888 if (arg[0] != '-')
1889 {
1890 recipients_arg = i;
1891 break;
1892 }
1893
1894 /* An option consistion of -- terminates the options */
1895
1896 if (Ustrcmp(arg, "--") == 0)
1897 {
1898 recipients_arg = i + 1;
1899 break;
1900 }
1901
1902 /* Handle flagged options */
1903
1904 switchchar = arg[1];
1905 argrest = arg+2;
1906
1907 /* Make all -ex options synonymous with -oex arguments, since that
1908 is assumed by various callers. Also make -qR options synonymous with -R
1909 options, as that seems to be required as well. Allow for -qqR too, and
1910 the same for -S options. */
1911
1912 if (Ustrncmp(arg+1, "oe", 2) == 0 ||
1913 Ustrncmp(arg+1, "qR", 2) == 0 ||
1914 Ustrncmp(arg+1, "qS", 2) == 0)
1915 {
1916 switchchar = arg[2];
1917 argrest++;
1918 }
1919 else if (Ustrncmp(arg+1, "qqR", 3) == 0 || Ustrncmp(arg+1, "qqS", 3) == 0)
1920 {
1921 switchchar = arg[3];
1922 argrest += 2;
1923 queue_2stage = TRUE;
1924 }
1925
1926 /* Make -r synonymous with -f, since it is a documented alias */
1927
1928 else if (arg[1] == 'r') switchchar = 'f';
1929
1930 /* Make -ov synonymous with -v */
1931
1932 else if (Ustrcmp(arg, "-ov") == 0)
1933 {
1934 switchchar = 'v';
1935 argrest++;
1936 }
1937
1938 /* deal with --option_aliases */
1939 else if (switchchar == '-')
1940 {
1941 if (Ustrcmp(argrest, "help") == 0)
1942 {
1943 usage_wanted = TRUE;
1944 break;
1945 }
1946 else if (Ustrcmp(argrest, "version") == 0)
1947 {
1948 switchchar = 'b';
1949 argrest = US"V";
1950 }
1951 }
1952
1953 /* High-level switch on active initial letter */
1954
1955 switch(switchchar)
1956 {
1957
1958 /* sendmail uses -Ac and -Am to control which .cf file is used;
1959 we ignore them. */
1960 case 'A':
1961 if (*argrest == '\0') { badarg = TRUE; break; }
1962 else
1963 {
1964 BOOL ignore = FALSE;
1965 switch (*argrest)
1966 {
1967 case 'c':
1968 case 'm':
1969 if (*(argrest + 1) == '\0')
1970 ignore = TRUE;
1971 break;
1972 }
1973 if (!ignore) { badarg = TRUE; break; }
1974 }
1975 break;
1976
1977 /* -Btype is a sendmail option for 7bit/8bit setting. Exim is 8-bit clean
1978 so has no need of it. */
1979
1980 case 'B':
1981 if (*argrest == 0) i++; /* Skip over the type */
1982 break;
1983
1984
1985 case 'b':
1986 receiving_message = FALSE; /* Reset TRUE for -bm, -bS, -bs below */
1987
1988 /* -bd: Run in daemon mode, awaiting SMTP connections.
1989 -bdf: Ditto, but in the foreground.
1990 */
1991
1992 if (*argrest == 'd')
1993 {
1994 daemon_listen = TRUE;
1995 if (*(++argrest) == 'f') background_daemon = FALSE;
1996 else if (*argrest != 0) { badarg = TRUE; break; }
1997 }
1998
1999 /* -be: Run in expansion test mode
2000 -bem: Ditto, but read a message from a file first
2001 */
2002
2003 else if (*argrest == 'e')
2004 {
2005 expansion_test = checking = TRUE;
2006 if (argrest[1] == 'm')
2007 {
2008 if (++i >= argc) { badarg = TRUE; break; }
2009 expansion_test_message = argv[i];
2010 argrest++;
2011 }
2012 if (argrest[1] != 0) { badarg = TRUE; break; }
2013 }
2014
2015 /* -bF: Run system filter test */
2016
2017 else if (*argrest == 'F')
2018 {
2019 filter_test |= checking = FTEST_SYSTEM;
2020 if (*(++argrest) != 0) { badarg = TRUE; break; }
2021 if (++i < argc) filter_test_sfile = argv[i]; else
2022 {
2023 fprintf(stderr, "exim: file name expected after %s\n", argv[i-1]);
2024 exit(EXIT_FAILURE);
2025 }
2026 }
2027
2028 /* -bf: Run user filter test
2029 -bfd: Set domain for filter testing
2030 -bfl: Set local part for filter testing
2031 -bfp: Set prefix for filter testing
2032 -bfs: Set suffix for filter testing
2033 */
2034
2035 else if (*argrest == 'f')
2036 {
2037 if (*(++argrest) == 0)
2038 {
2039 filter_test |= checking = FTEST_USER;
2040 if (++i < argc) filter_test_ufile = argv[i]; else
2041 {
2042 fprintf(stderr, "exim: file name expected after %s\n", argv[i-1]);
2043 exit(EXIT_FAILURE);
2044 }
2045 }
2046 else
2047 {
2048 if (++i >= argc)
2049 {
2050 fprintf(stderr, "exim: string expected after %s\n", arg);
2051 exit(EXIT_FAILURE);
2052 }
2053 if (Ustrcmp(argrest, "d") == 0) ftest_domain = argv[i];
2054 else if (Ustrcmp(argrest, "l") == 0) ftest_localpart = argv[i];
2055 else if (Ustrcmp(argrest, "p") == 0) ftest_prefix = argv[i];
2056 else if (Ustrcmp(argrest, "s") == 0) ftest_suffix = argv[i];
2057 else { badarg = TRUE; break; }
2058 }
2059 }
2060
2061 /* -bh: Host checking - an IP address must follow. */
2062
2063 else if (Ustrcmp(argrest, "h") == 0 || Ustrcmp(argrest, "hc") == 0)
2064 {
2065 if (++i >= argc) { badarg = TRUE; break; }
2066 sender_host_address = argv[i];
2067 host_checking = checking = log_testing_mode = TRUE;
2068 host_checking_callout = argrest[1] == 'c';
2069 message_logs = FALSE;
2070 }
2071
2072 /* -bi: This option is used by sendmail to initialize *the* alias file,
2073 though it has the -oA option to specify a different file. Exim has no
2074 concept of *the* alias file, but since Sun's YP make script calls
2075 sendmail this way, some support must be provided. */
2076
2077 else if (Ustrcmp(argrest, "i") == 0) bi_option = TRUE;
2078
2079 /* -bI: provide information, of the type to follow after a colon.
2080 This is an Exim flag. */
2081
2082 else if (argrest[0] == 'I' && Ustrlen(argrest) >= 2 && argrest[1] == ':')
2083 {
2084 uschar *p = &argrest[2];
2085 info_flag = CMDINFO_HELP;
2086 if (Ustrlen(p))
2087 {
2088 if (strcmpic(p, CUS"sieve") == 0)
2089 {
2090 info_flag = CMDINFO_SIEVE;
2091 info_stdout = TRUE;
2092 }
2093 else if (strcmpic(p, CUS"dscp") == 0)
2094 {
2095 info_flag = CMDINFO_DSCP;
2096 info_stdout = TRUE;
2097 }
2098 else if (strcmpic(p, CUS"help") == 0)
2099 {
2100 info_stdout = TRUE;
2101 }
2102 }
2103 }
2104
2105 /* -bm: Accept and deliver message - the default option. Reinstate
2106 receiving_message, which got turned off for all -b options. */
2107
2108 else if (Ustrcmp(argrest, "m") == 0) receiving_message = TRUE;
2109
2110 /* -bmalware: test the filename given for malware */
2111
2112 else if (Ustrcmp(argrest, "malware") == 0)
2113 {
2114 if (++i >= argc) { badarg = TRUE; break; }
2115 checking = TRUE;
2116 malware_test_file = argv[i];
2117 }
2118
2119 /* -bnq: For locally originating messages, do not qualify unqualified
2120 addresses. In the envelope, this causes errors; in header lines they
2121 just get left. */
2122
2123 else if (Ustrcmp(argrest, "nq") == 0)
2124 {
2125 allow_unqualified_sender = FALSE;
2126 allow_unqualified_recipient = FALSE;
2127 }
2128
2129 /* -bpxx: List the contents of the mail queue, in various forms. If
2130 the option is -bpc, just a queue count is needed. Otherwise, if the
2131 first letter after p is r, then order is random. */
2132
2133 else if (*argrest == 'p')
2134 {
2135 if (*(++argrest) == 'c')
2136 {
2137 count_queue = TRUE;
2138 if (*(++argrest) != 0) badarg = TRUE;
2139 break;
2140 }
2141
2142 if (*argrest == 'r')
2143 {
2144 list_queue_option = 8;
2145 argrest++;
2146 }
2147 else list_queue_option = 0;
2148
2149 list_queue = TRUE;
2150
2151 /* -bp: List the contents of the mail queue, top-level only */
2152
2153 if (*argrest == 0) {}
2154
2155 /* -bpu: List the contents of the mail queue, top-level undelivered */
2156
2157 else if (Ustrcmp(argrest, "u") == 0) list_queue_option += 1;
2158
2159 /* -bpa: List the contents of the mail queue, including all delivered */
2160
2161 else if (Ustrcmp(argrest, "a") == 0) list_queue_option += 2;
2162
2163 /* Unknown after -bp[r] */
2164
2165 else
2166 {
2167 badarg = TRUE;
2168 break;
2169 }
2170 }
2171
2172
2173 /* -bP: List the configuration variables given as the address list.
2174 Force -v, so configuration errors get displayed. */
2175
2176 else if (Ustrcmp(argrest, "P") == 0)
2177 {
2178 /* -bP config: we need to setup here, because later,
2179 * when list_options is checked, the config is read already */
2180 if (argv[i+1] && Ustrcmp(argv[i+1], "config") == 0)
2181 {
2182 list_config = TRUE;
2183 readconf_save_config(version_string);
2184 }
2185 else
2186 {
2187 list_options = TRUE;
2188 debug_selector |= D_v;
2189 debug_file = stderr;
2190 }
2191 }
2192
2193 /* -brt: Test retry configuration lookup */
2194
2195 else if (Ustrcmp(argrest, "rt") == 0)
2196 {
2197 checking = TRUE;
2198 test_retry_arg = i + 1;
2199 goto END_ARG;
2200 }
2201
2202 /* -brw: Test rewrite configuration */
2203
2204 else if (Ustrcmp(argrest, "rw") == 0)
2205 {
2206 checking = TRUE;
2207 test_rewrite_arg = i + 1;
2208 goto END_ARG;
2209 }
2210
2211 /* -bS: Read SMTP commands on standard input, but produce no replies -
2212 all errors are reported by sending messages. */
2213
2214 else if (Ustrcmp(argrest, "S") == 0)
2215 smtp_input = smtp_batched_input = receiving_message = TRUE;
2216
2217 /* -bs: Read SMTP commands on standard input and produce SMTP replies
2218 on standard output. */
2219
2220 else if (Ustrcmp(argrest, "s") == 0) smtp_input = receiving_message = TRUE;
2221
2222 /* -bt: address testing mode */
2223
2224 else if (Ustrcmp(argrest, "t") == 0)
2225 address_test_mode = checking = log_testing_mode = TRUE;
2226
2227 /* -bv: verify addresses */
2228
2229 else if (Ustrcmp(argrest, "v") == 0)
2230 verify_address_mode = checking = log_testing_mode = TRUE;
2231
2232 /* -bvs: verify sender addresses */
2233
2234 else if (Ustrcmp(argrest, "vs") == 0)
2235 {
2236 verify_address_mode = checking = log_testing_mode = TRUE;
2237 verify_as_sender = TRUE;
2238 }
2239
2240 /* -bV: Print version string and support details */
2241
2242 else if (Ustrcmp(argrest, "V") == 0)
2243 {
2244 printf("Exim version %s #%s built %s\n", version_string,
2245 version_cnumber, version_date);
2246 printf("%s\n", CS version_copyright);
2247 version_printed = TRUE;
2248 show_whats_supported(stdout);
2249 log_testing_mode = TRUE;
2250 }
2251
2252 /* -bw: inetd wait mode, accept a listening socket as stdin */
2253
2254 else if (*argrest == 'w')
2255 {
2256 inetd_wait_mode = TRUE;
2257 background_daemon = FALSE;
2258 daemon_listen = TRUE;
2259 if (*(++argrest) != '\0')
2260 {
2261 inetd_wait_timeout = readconf_readtime(argrest, 0, FALSE);
2262 if (inetd_wait_timeout <= 0)
2263 {
2264 fprintf(stderr, "exim: bad time value %s: abandoned\n", argv[i]);
2265 exit(EXIT_FAILURE);
2266 }
2267 }
2268 }
2269
2270 else badarg = TRUE;
2271 break;
2272
2273
2274 /* -C: change configuration file list; ignore if it isn't really
2275 a change! Enforce a prefix check if required. */
2276
2277 case 'C':
2278 if (*argrest == 0)
2279 {
2280 if(++i < argc) argrest = argv[i]; else
2281 { badarg = TRUE; break; }
2282 }
2283 if (Ustrcmp(config_main_filelist, argrest) != 0)
2284 {
2285 #ifdef ALT_CONFIG_PREFIX
2286 int sep = 0;
2287 int len = Ustrlen(ALT_CONFIG_PREFIX);
2288 uschar *list = argrest;
2289 uschar *filename;
2290 while((filename = string_nextinlist(&list, &sep, big_buffer,
2291 big_buffer_size)) != NULL)
2292 {
2293 if ((Ustrlen(filename) < len ||
2294 Ustrncmp(filename, ALT_CONFIG_PREFIX, len) != 0 ||
2295 Ustrstr(filename, "/../") != NULL) &&
2296 (Ustrcmp(filename, "/dev/null") != 0 || real_uid != root_uid))
2297 {
2298 fprintf(stderr, "-C Permission denied\n");
2299 exit(EXIT_FAILURE);
2300 }
2301 }
2302 #endif
2303 if (real_uid != root_uid)
2304 {
2305 #ifdef TRUSTED_CONFIG_LIST
2306
2307 if (real_uid != exim_uid
2308 #ifdef CONFIGURE_OWNER
2309 && real_uid != config_uid
2310 #endif
2311 )
2312 trusted_config = FALSE;
2313 else
2314 {
2315 FILE *trust_list = Ufopen(TRUSTED_CONFIG_LIST, "rb");
2316 if (trust_list)
2317 {
2318 struct stat statbuf;
2319
2320 if (fstat(fileno(trust_list), &statbuf) != 0 ||
2321 (statbuf.st_uid != root_uid /* owner not root */
2322 #ifdef CONFIGURE_OWNER
2323 && statbuf.st_uid != config_uid /* owner not the special one */
2324 #endif
2325 ) || /* or */
2326 (statbuf.st_gid != root_gid /* group not root */
2327 #ifdef CONFIGURE_GROUP
2328 && statbuf.st_gid != config_gid /* group not the special one */
2329 #endif
2330 && (statbuf.st_mode & 020) != 0 /* group writeable */
2331 ) || /* or */
2332 (statbuf.st_mode & 2) != 0) /* world writeable */
2333 {
2334 trusted_config = FALSE;
2335 fclose(trust_list);
2336 }
2337 else
2338 {
2339 /* Well, the trust list at least is up to scratch... */
2340 void *reset_point = store_get(0);
2341 uschar *trusted_configs[32];
2342 int nr_configs = 0;
2343 int i = 0;
2344
2345 while (Ufgets(big_buffer, big_buffer_size, trust_list))
2346 {
2347 uschar *start = big_buffer, *nl;
2348 while (*start && isspace(*start))
2349 start++;
2350 if (*start != '/')
2351 continue;
2352 nl = Ustrchr(start, '\n');
2353 if (nl)
2354 *nl = 0;
2355 trusted_configs[nr_configs++] = string_copy(start);
2356 if (nr_configs == 32)
2357 break;
2358 }
2359 fclose(trust_list);
2360
2361 if (nr_configs)
2362 {
2363 int sep = 0;
2364 const uschar *list = argrest;
2365 uschar *filename;
2366 while (trusted_config && (filename = string_nextinlist(&list,
2367 &sep, big_buffer, big_buffer_size)) != NULL)
2368 {
2369 for (i=0; i < nr_configs; i++)
2370 {
2371 if (Ustrcmp(filename, trusted_configs[i]) == 0)
2372 break;
2373 }
2374 if (i == nr_configs)
2375 {
2376 trusted_config = FALSE;
2377 break;
2378 }
2379 }
2380 store_reset(reset_point);
2381 }
2382 else
2383 {
2384 /* No valid prefixes found in trust_list file. */
2385 trusted_config = FALSE;
2386 }
2387 }
2388 }
2389 else
2390 {
2391 /* Could not open trust_list file. */
2392 trusted_config = FALSE;
2393 }
2394 }
2395 #else
2396 /* Not root; don't trust config */
2397 trusted_config = FALSE;
2398 #endif
2399 }
2400
2401 config_main_filelist = argrest;
2402 config_changed = TRUE;
2403 }
2404 break;
2405
2406
2407 /* -D: set up a macro definition */
2408
2409 case 'D':
2410 #ifdef DISABLE_D_OPTION
2411 fprintf(stderr, "exim: -D is not available in this Exim binary\n");
2412 exit(EXIT_FAILURE);
2413 #else
2414 {
2415 int ptr = 0;
2416 macro_item *m;
2417 uschar name[24];
2418 uschar *s = argrest;
2419
2420 opt_D_used = TRUE;
2421 while (isspace(*s)) s++;
2422
2423 if (*s < 'A' || *s > 'Z')
2424 {
2425 fprintf(stderr, "exim: macro name set by -D must start with "
2426 "an upper case letter\n");
2427 exit(EXIT_FAILURE);
2428 }
2429
2430 while (isalnum(*s) || *s == '_')
2431 {
2432 if (ptr < sizeof(name)-1) name[ptr++] = *s;
2433 s++;
2434 }
2435 name[ptr] = 0;
2436 if (ptr == 0) { badarg = TRUE; break; }
2437 while (isspace(*s)) s++;
2438 if (*s != 0)
2439 {
2440 if (*s++ != '=') { badarg = TRUE; break; }
2441 while (isspace(*s)) s++;
2442 }
2443
2444 for (m = macros; m; m = m->next)
2445 if (Ustrcmp(m->name, name) == 0)
2446 {
2447 fprintf(stderr, "exim: duplicated -D in command line\n");
2448 exit(EXIT_FAILURE);
2449 }
2450
2451 m = macro_create(name, s, TRUE);
2452
2453 if (clmacro_count >= MAX_CLMACROS)
2454 {
2455 fprintf(stderr, "exim: too many -D options on command line\n");
2456 exit(EXIT_FAILURE);
2457 }
2458 clmacros[clmacro_count++] = string_sprintf("-D%s=%s", m->name,
2459 m->replacement);
2460 }
2461 #endif
2462 break;
2463
2464 /* -d: Set debug level (see also -v below) or set the drop_cr option.
2465 The latter is now a no-op, retained for compatibility only. If -dd is used,
2466 debugging subprocesses of the daemon is disabled. */
2467
2468 case 'd':
2469 if (Ustrcmp(argrest, "ropcr") == 0)
2470 {
2471 /* drop_cr = TRUE; */
2472 }
2473
2474 /* Use an intermediate variable so that we don't set debugging while
2475 decoding the debugging bits. */
2476
2477 else
2478 {
2479 unsigned int selector = D_default;
2480 debug_selector = 0;
2481 debug_file = NULL;
2482 if (*argrest == 'd')
2483 {
2484 debug_daemon = TRUE;
2485 argrest++;
2486 }
2487 if (*argrest != 0)
2488 decode_bits(&selector, 1, debug_notall, argrest,
2489 debug_options, debug_options_count, US"debug", 0);
2490 debug_selector = selector;
2491 }
2492 break;
2493
2494
2495 /* -E: This is a local error message. This option is not intended for
2496 external use at all, but is not restricted to trusted callers because it
2497 does no harm (just suppresses certain error messages) and if Exim is run
2498 not setuid root it won't always be trusted when it generates error
2499 messages using this option. If there is a message id following -E, point
2500 message_reference at it, for logging. */
2501
2502 case 'E':
2503 local_error_message = TRUE;
2504 if (mac_ismsgid(argrest)) message_reference = argrest;
2505 break;
2506
2507
2508 /* -ex: The vacation program calls sendmail with the undocumented "-eq"
2509 option, so it looks as if historically the -oex options are also callable
2510 without the leading -o. So we have to accept them. Before the switch,
2511 anything starting -oe has been converted to -e. Exim does not support all
2512 of the sendmail error options. */
2513
2514 case 'e':
2515 if (Ustrcmp(argrest, "e") == 0)
2516 {
2517 arg_error_handling = ERRORS_SENDER;
2518 errors_sender_rc = EXIT_SUCCESS;
2519 }
2520 else if (Ustrcmp(argrest, "m") == 0) arg_error_handling = ERRORS_SENDER;
2521 else if (Ustrcmp(argrest, "p") == 0) arg_error_handling = ERRORS_STDERR;
2522 else if (Ustrcmp(argrest, "q") == 0) arg_error_handling = ERRORS_STDERR;
2523 else if (Ustrcmp(argrest, "w") == 0) arg_error_handling = ERRORS_SENDER;
2524 else badarg = TRUE;
2525 break;
2526
2527
2528 /* -F: Set sender's full name, used instead of the gecos entry from
2529 the password file. Since users can usually alter their gecos entries,
2530 there's no security involved in using this instead. The data can follow
2531 the -F or be in the next argument. */
2532
2533 case 'F':
2534 if (*argrest == 0)
2535 {
2536 if(++i < argc) argrest = argv[i]; else
2537 { badarg = TRUE; break; }
2538 }
2539 originator_name = argrest;
2540 sender_name_forced = TRUE;
2541 break;
2542
2543
2544 /* -f: Set sender's address - this value is only actually used if Exim is
2545 run by a trusted user, or if untrusted_set_sender is set and matches the
2546 address, except that the null address can always be set by any user. The
2547 test for this happens later, when the value given here is ignored when not
2548 permitted. For an untrusted user, the actual sender is still put in Sender:
2549 if it doesn't match the From: header (unless no_local_from_check is set).
2550 The data can follow the -f or be in the next argument. The -r switch is an
2551 obsolete form of -f but since there appear to be programs out there that
2552 use anything that sendmail has ever supported, better accept it - the
2553 synonymizing is done before the switch above.
2554
2555 At this stage, we must allow domain literal addresses, because we don't
2556 know what the setting of allow_domain_literals is yet. Ditto for trailing
2557 dots and strip_trailing_dot. */
2558
2559 case 'f':
2560 {
2561 int dummy_start, dummy_end;
2562 uschar *errmess;
2563 if (*argrest == 0)
2564 {
2565 if (i+1 < argc) argrest = argv[++i]; else
2566 { badarg = TRUE; break; }
2567 }
2568 if (*argrest == 0)
2569 sender_address = string_sprintf(""); /* Ensure writeable memory */
2570 else
2571 {
2572 uschar *temp = argrest + Ustrlen(argrest) - 1;
2573 while (temp >= argrest && isspace(*temp)) temp--;
2574 if (temp >= argrest && *temp == '.') f_end_dot = TRUE;
2575 allow_domain_literals = TRUE;
2576 strip_trailing_dot = TRUE;
2577 #ifdef SUPPORT_I18N
2578 allow_utf8_domains = TRUE;
2579 #endif
2580 sender_address = parse_extract_address(argrest, &errmess,
2581 &dummy_start, &dummy_end, &sender_address_domain, TRUE);
2582 #ifdef SUPPORT_I18N
2583 message_smtputf8 = string_is_utf8(sender_address);
2584 allow_utf8_domains = FALSE;
2585 #endif
2586 allow_domain_literals = FALSE;
2587 strip_trailing_dot = FALSE;
2588 if (sender_address == NULL)
2589 {
2590 fprintf(stderr, "exim: bad -f address \"%s\": %s\n", argrest, errmess);
2591 return EXIT_FAILURE;
2592 }
2593 }
2594 sender_address_forced = TRUE;
2595 }
2596 break;
2597
2598 /* -G: sendmail invocation to specify that it's a gateway submission and
2599 sendmail may complain about problems instead of fixing them.
2600 We make it equivalent to an ACL "control = suppress_local_fixups" and do
2601 not at this time complain about problems. */
2602
2603 case 'G':
2604 flag_G = TRUE;
2605 break;
2606
2607 /* -h: Set the hop count for an incoming message. Exim does not currently
2608 support this; it always computes it by counting the Received: headers.
2609 To put it in will require a change to the spool header file format. */
2610
2611 case 'h':
2612 if (*argrest == 0)
2613 {
2614 if(++i < argc) argrest = argv[i]; else
2615 { badarg = TRUE; break; }
2616 }
2617 if (!isdigit(*argrest)) badarg = TRUE;
2618 break;
2619
2620
2621 /* -i: Set flag so dot doesn't end non-SMTP input (same as -oi, seems
2622 not to be documented for sendmail but mailx (at least) uses it) */
2623
2624 case 'i':
2625 if (*argrest == 0) dot_ends = FALSE; else badarg = TRUE;
2626 break;
2627
2628
2629 /* -L: set the identifier used for syslog; equivalent to setting
2630 syslog_processname in the config file, but needs to be an admin option. */
2631
2632 case 'L':
2633 if (*argrest == '\0')
2634 {
2635 if(++i < argc) argrest = argv[i]; else
2636 { badarg = TRUE; break; }
2637 }
2638 sz = Ustrlen(argrest);
2639 if (sz > 32)
2640 {
2641 fprintf(stderr, "exim: the -L syslog name is too long: \"%s\"\n", argrest);
2642 return EXIT_FAILURE;
2643 }
2644 if (sz < 1)
2645 {
2646 fprintf(stderr, "exim: the -L syslog name is too short\n");
2647 return EXIT_FAILURE;
2648 }
2649 cmdline_syslog_name = argrest;
2650 break;
2651
2652 case 'M':
2653 receiving_message = FALSE;
2654
2655 /* -MC: continue delivery of another message via an existing open
2656 file descriptor. This option is used for an internal call by the
2657 smtp transport when there is a pending message waiting to go to an
2658 address to which it has got a connection. Five subsequent arguments are
2659 required: transport name, host name, IP address, sequence number, and
2660 message_id. Transports may decline to create new processes if the sequence
2661 number gets too big. The channel is stdin. This (-MC) must be the last
2662 argument. There's a subsequent check that the real-uid is privileged.
2663
2664 If we are running in the test harness. delay for a bit, to let the process
2665 that set this one up complete. This makes for repeatability of the logging,
2666 etc. output. */
2667
2668 if (Ustrcmp(argrest, "C") == 0)
2669 {
2670 union sockaddr_46 interface_sock;
2671 EXIM_SOCKLEN_T size = sizeof(interface_sock);
2672
2673 if (argc != i + 6)
2674 {
2675 fprintf(stderr, "exim: too many or too few arguments after -MC\n");
2676 return EXIT_FAILURE;
2677 }
2678
2679 if (msg_action_arg >= 0)
2680 {
2681 fprintf(stderr, "exim: incompatible arguments\n");
2682 return EXIT_FAILURE;
2683 }
2684
2685 continue_transport = argv[++i];
2686 continue_hostname = argv[++i];
2687 continue_host_address = argv[++i];
2688 continue_sequence = Uatoi(argv[++i]);
2689 msg_action = MSG_DELIVER;
2690 msg_action_arg = ++i;
2691 forced_delivery = TRUE;
2692 queue_run_pid = passed_qr_pid;
2693 queue_run_pipe = passed_qr_pipe;
2694
2695 if (!mac_ismsgid(argv[i]))
2696 {
2697 fprintf(stderr, "exim: malformed message id %s after -MC option\n",
2698 argv[i]);
2699 return EXIT_FAILURE;
2700 }
2701
2702 /* Set up $sending_ip_address and $sending_port */
2703
2704 if (getsockname(fileno(stdin), (struct sockaddr *)(&interface_sock),
2705 &size) == 0)
2706 sending_ip_address = host_ntoa(-1, &interface_sock, NULL,
2707 &sending_port);
2708 else
2709 {
2710 fprintf(stderr, "exim: getsockname() failed after -MC option: %s\n",
2711 strerror(errno));
2712 return EXIT_FAILURE;
2713 }
2714
2715 if (running_in_test_harness) millisleep(500);
2716 break;
2717 }
2718
2719 else if (*argrest == 'C' && argrest[1] && !argrest[2])
2720 {
2721 switch(argrest[1])
2722 {
2723 /* -MCA: set the smtp_authenticated flag; this is useful only when it
2724 precedes -MC (see above). The flag indicates that the host to which
2725 Exim is connected has accepted an AUTH sequence. */
2726
2727 case 'A': smtp_authenticated = TRUE; break;
2728
2729 /* -MCD: set the smtp_use_dsn flag; this indicates that the host
2730 that exim is connected to supports the esmtp extension DSN */
2731
2732 case 'D': smtp_peer_options |= PEER_OFFERED_DSN; break;
2733
2734 /* -MCG: set the queue name, to a non-default value */
2735
2736 case 'G': if (++i < argc) queue_name = string_copy(argv[i]);
2737 else badarg = TRUE;
2738 break;
2739
2740 /* -MCK: the peer offered CHUNKING. Must precede -MC */
2741
2742 case 'K': smtp_peer_options |= PEER_OFFERED_CHUNKING; break;
2743
2744 /* -MCP: set the smtp_use_pipelining flag; this is useful only when
2745 it preceded -MC (see above) */
2746
2747 case 'P': smtp_peer_options |= PEER_OFFERED_PIPE; break;
2748
2749 /* -MCQ: pass on the pid of the queue-running process that started
2750 this chain of deliveries and the fd of its synchronizing pipe; this
2751 is useful only when it precedes -MC (see above) */
2752
2753 case 'Q': if (++i < argc) passed_qr_pid = (pid_t)(Uatol(argv[i]));
2754 else badarg = TRUE;
2755 if (++i < argc) passed_qr_pipe = (int)(Uatol(argv[i]));
2756 else badarg = TRUE;
2757 break;
2758
2759 /* -MCS: set the smtp_use_size flag; this is useful only when it
2760 precedes -MC (see above) */
2761
2762 case 'S': smtp_peer_options |= PEER_OFFERED_SIZE; break;
2763
2764 #ifdef SUPPORT_TLS
2765 /* -MCT: set the tls_offered flag; this is useful only when it
2766 precedes -MC (see above). The flag indicates that the host to which
2767 Exim is connected has offered TLS support. */
2768
2769 case 'T': smtp_peer_options |= PEER_OFFERED_TLS; break;
2770 #endif
2771
2772 default: badarg = TRUE; break;
2773 }
2774 break;
2775 }
2776
2777 /* -M[x]: various operations on the following list of message ids:
2778 -M deliver the messages, ignoring next retry times and thawing
2779 -Mc deliver the messages, checking next retry times, no thawing
2780 -Mf freeze the messages
2781 -Mg give up on the messages
2782 -Mt thaw the messages
2783 -Mrm remove the messages
2784 In the above cases, this must be the last option. There are also the
2785 following options which are followed by a single message id, and which
2786 act on that message. Some of them use the "recipient" addresses as well.
2787 -Mar add recipient(s)
2788 -Mmad mark all recipients delivered
2789 -Mmd mark recipients(s) delivered
2790 -Mes edit sender
2791 -Mset load a message for use with -be
2792 -Mvb show body
2793 -Mvc show copy (of whole message, in RFC 2822 format)
2794 -Mvh show header
2795 -Mvl show log
2796 */
2797
2798 else if (*argrest == 0)
2799 {
2800 msg_action = MSG_DELIVER;
2801 forced_delivery = deliver_force_thaw = TRUE;
2802 }
2803 else if (Ustrcmp(argrest, "ar") == 0)
2804 {
2805 msg_action = MSG_ADD_RECIPIENT;
2806 one_msg_action = TRUE;
2807 }
2808 else if (Ustrcmp(argrest, "c") == 0) msg_action = MSG_DELIVER;
2809 else if (Ustrcmp(argrest, "es") == 0)
2810 {
2811 msg_action = MSG_EDIT_SENDER;
2812 one_msg_action = TRUE;
2813 }
2814 else if (Ustrcmp(argrest, "f") == 0) msg_action = MSG_FREEZE;
2815 else if (Ustrcmp(argrest, "g") == 0)
2816 {
2817 msg_action = MSG_DELIVER;
2818 deliver_give_up = TRUE;
2819 }
2820 else if (Ustrcmp(argrest, "mad") == 0)
2821 {
2822 msg_action = MSG_MARK_ALL_DELIVERED;
2823 }
2824 else if (Ustrcmp(argrest, "md") == 0)
2825 {
2826 msg_action = MSG_MARK_DELIVERED;
2827 one_msg_action = TRUE;
2828 }
2829 else if (Ustrcmp(argrest, "rm") == 0) msg_action = MSG_REMOVE;
2830 else if (Ustrcmp(argrest, "set") == 0)
2831 {
2832 msg_action = MSG_LOAD;
2833 one_msg_action = TRUE;
2834 }
2835 else if (Ustrcmp(argrest, "t") == 0) msg_action = MSG_THAW;
2836 else if (Ustrcmp(argrest, "vb") == 0)
2837 {
2838 msg_action = MSG_SHOW_BODY;
2839 one_msg_action = TRUE;
2840 }
2841 else if (Ustrcmp(argrest, "vc") == 0)
2842 {
2843 msg_action = MSG_SHOW_COPY;
2844 one_msg_action = TRUE;
2845 }
2846 else if (Ustrcmp(argrest, "vh") == 0)
2847 {
2848 msg_action = MSG_SHOW_HEADER;
2849 one_msg_action = TRUE;
2850 }
2851 else if (Ustrcmp(argrest, "vl") == 0)
2852 {
2853 msg_action = MSG_SHOW_LOG;
2854 one_msg_action = TRUE;
2855 }
2856 else { badarg = TRUE; break; }
2857
2858 /* All the -Mxx options require at least one message id. */
2859
2860 msg_action_arg = i + 1;
2861 if (msg_action_arg >= argc)
2862 {
2863 fprintf(stderr, "exim: no message ids given after %s option\n", arg);
2864 return EXIT_FAILURE;
2865 }
2866
2867 /* Some require only message ids to follow */
2868
2869 if (!one_msg_action)
2870 {
2871 int j;
2872 for (j = msg_action_arg; j < argc; j++) if (!mac_ismsgid(argv[j]))
2873 {
2874 fprintf(stderr, "exim: malformed message id %s after %s option\n",
2875 argv[j], arg);
2876 return EXIT_FAILURE;
2877 }
2878 goto END_ARG; /* Remaining args are ids */
2879 }
2880
2881 /* Others require only one message id, possibly followed by addresses,
2882 which will be handled as normal arguments. */
2883
2884 else
2885 {
2886 if (!mac_ismsgid(argv[msg_action_arg]))
2887 {
2888 fprintf(stderr, "exim: malformed message id %s after %s option\n",
2889 argv[msg_action_arg], arg);
2890 return EXIT_FAILURE;
2891 }
2892 i++;
2893 }
2894 break;
2895
2896
2897 /* Some programs seem to call the -om option without the leading o;
2898 for sendmail it askes for "me too". Exim always does this. */
2899
2900 case 'm':
2901 if (*argrest != 0) badarg = TRUE;
2902 break;
2903
2904
2905 /* -N: don't do delivery - a debugging option that stops transports doing
2906 their thing. It implies debugging at the D_v level. */
2907
2908 case 'N':
2909 if (*argrest == 0)
2910 {
2911 dont_deliver = TRUE;
2912 debug_selector |= D_v;
2913 debug_file = stderr;
2914 }
2915 else badarg = TRUE;
2916 break;
2917
2918
2919 /* -n: This means "don't alias" in sendmail, apparently.
2920 For normal invocations, it has no effect.
2921 It may affect some other options. */
2922
2923 case 'n':
2924 flag_n = TRUE;
2925 break;
2926
2927 /* -O: Just ignore it. In sendmail, apparently -O option=value means set
2928 option to the specified value. This form uses long names. We need to handle
2929 -O option=value and -Ooption=value. */
2930
2931 case 'O':
2932 if (*argrest == 0)
2933 {
2934 if (++i >= argc)
2935 {
2936 fprintf(stderr, "exim: string expected after -O\n");
2937 exit(EXIT_FAILURE);
2938 }
2939 }
2940 break;
2941
2942 case 'o':
2943
2944 /* -oA: Set an argument for the bi command (sendmail's "alternate alias
2945 file" option). */
2946
2947 if (*argrest == 'A')
2948 {
2949 alias_arg = argrest + 1;
2950 if (alias_arg[0] == 0)
2951 {
2952 if (i+1 < argc) alias_arg = argv[++i]; else
2953 {
2954 fprintf(stderr, "exim: string expected after -oA\n");
2955 exit(EXIT_FAILURE);
2956 }
2957 }
2958 }
2959
2960 /* -oB: Set a connection message max value for remote deliveries */
2961
2962 else if (*argrest == 'B')
2963 {
2964 uschar *p = argrest + 1;
2965 if (p[0] == 0)
2966 {
2967 if (i+1 < argc && isdigit((argv[i+1][0]))) p = argv[++i]; else
2968 {
2969 connection_max_messages = 1;
2970 p = NULL;
2971 }
2972 }
2973
2974 if (p != NULL)
2975 {
2976 if (!isdigit(*p))
2977 {
2978 fprintf(stderr, "exim: number expected after -oB\n");
2979 exit(EXIT_FAILURE);
2980 }
2981 connection_max_messages = Uatoi(p);
2982 }
2983 }
2984
2985 /* -odb: background delivery */
2986
2987 else if (Ustrcmp(argrest, "db") == 0)
2988 {
2989 synchronous_delivery = FALSE;
2990 arg_queue_only = FALSE;
2991 queue_only_set = TRUE;
2992 }
2993
2994 /* -odf: foreground delivery (smail-compatible option); same effect as
2995 -odi: interactive (synchronous) delivery (sendmail-compatible option)
2996 */
2997
2998 else if (Ustrcmp(argrest, "df") == 0 || Ustrcmp(argrest, "di") == 0)
2999 {
3000 synchronous_delivery = TRUE;
3001 arg_queue_only = FALSE;
3002 queue_only_set = TRUE;
3003 }
3004
3005 /* -odq: queue only */
3006
3007 else if (Ustrcmp(argrest, "dq") == 0)
3008 {
3009 synchronous_delivery = FALSE;
3010 arg_queue_only = TRUE;
3011 queue_only_set = TRUE;
3012 }
3013
3014 /* -odqs: queue SMTP only - do local deliveries and remote routing,
3015 but no remote delivery */
3016
3017 else if (Ustrcmp(argrest, "dqs") == 0)
3018 {
3019 queue_smtp = TRUE;
3020 arg_queue_only = FALSE;
3021 queue_only_set = TRUE;
3022 }
3023
3024 /* -oex: Sendmail error flags. As these are also accepted without the
3025 leading -o prefix, for compatibility with vacation and other callers,
3026 they are handled with -e above. */
3027
3028 /* -oi: Set flag so dot doesn't end non-SMTP input (same as -i)
3029 -oitrue: Another sendmail syntax for the same */
3030
3031 else if (Ustrcmp(argrest, "i") == 0 ||
3032 Ustrcmp(argrest, "itrue") == 0)
3033 dot_ends = FALSE;
3034
3035 /* -oM*: Set various characteristics for an incoming message; actually
3036 acted on for trusted callers only. */
3037
3038 else if (*argrest == 'M')
3039 {
3040 if (i+1 >= argc)
3041 {
3042 fprintf(stderr, "exim: data expected after -o%s\n", argrest);
3043 exit(EXIT_FAILURE);
3044 }
3045
3046 /* -oMa: Set sender host address */
3047
3048 if (Ustrcmp(argrest, "Ma") == 0) sender_host_address = argv[++i];
3049
3050 /* -oMaa: Set authenticator name */
3051
3052 else if (Ustrcmp(argrest, "Maa") == 0)
3053 sender_host_authenticated = argv[++i];
3054
3055 /* -oMas: setting authenticated sender */
3056
3057 else if (Ustrcmp(argrest, "Mas") == 0) authenticated_sender = argv[++i];
3058
3059 /* -oMai: setting authenticated id */
3060
3061 else if (Ustrcmp(argrest, "Mai") == 0) authenticated_id = argv[++i];
3062
3063 /* -oMi: Set incoming interface address */
3064
3065 else if (Ustrcmp(argrest, "Mi") == 0) interface_address = argv[++i];
3066
3067 /* -oMm: Message reference */
3068
3069 else if (Ustrcmp(argrest, "Mm") == 0)
3070 {
3071 if (!mac_ismsgid(argv[i+1]))
3072 {
3073 fprintf(stderr,"-oMm must be a valid message ID\n");
3074 exit(EXIT_FAILURE);
3075 }
3076 if (!trusted_config)
3077 {
3078 fprintf(stderr,"-oMm must be called by a trusted user/config\n");
3079 exit(EXIT_FAILURE);
3080 }
3081 message_reference = argv[++i];
3082 }
3083
3084 /* -oMr: Received protocol */
3085
3086 else if (Ustrcmp(argrest, "Mr") == 0) received_protocol = argv[++i];
3087
3088 /* -oMs: Set sender host name */
3089
3090 else if (Ustrcmp(argrest, "Ms") == 0) sender_host_name = argv[++i];
3091
3092 /* -oMt: Set sender ident */
3093
3094 else if (Ustrcmp(argrest, "Mt") == 0)
3095 {
3096 sender_ident_set = TRUE;
3097 sender_ident = argv[++i];
3098 }
3099
3100 /* Else a bad argument */
3101
3102 else
3103 {
3104 badarg = TRUE;
3105 break;
3106 }
3107 }
3108
3109 /* -om: Me-too flag for aliases. Exim always does this. Some programs
3110 seem to call this as -m (undocumented), so that is also accepted (see
3111 above). */
3112
3113 else if (Ustrcmp(argrest, "m") == 0) {}
3114
3115 /* -oo: An ancient flag for old-style addresses which still seems to
3116 crop up in some calls (see in SCO). */
3117
3118 else if (Ustrcmp(argrest, "o") == 0) {}
3119
3120 /* -oP <name>: set pid file path for daemon */
3121
3122 else if (Ustrcmp(argrest, "P") == 0)
3123 override_pid_file_path = argv[++i];
3124
3125 /* -or <n>: set timeout for non-SMTP acceptance
3126 -os <n>: set timeout for SMTP acceptance */
3127
3128 else if (*argrest == 'r' || *argrest == 's')
3129 {
3130 int *tp = (*argrest == 'r')?
3131 &arg_receive_timeout : &arg_smtp_receive_timeout;
3132 if (argrest[1] == 0)
3133 {
3134 if (i+1 < argc) *tp= readconf_readtime(argv[++i], 0, FALSE);
3135 }
3136 else *tp = readconf_readtime(argrest + 1, 0, FALSE);
3137 if (*tp < 0)
3138 {
3139 fprintf(stderr, "exim: bad time value %s: abandoned\n", argv[i]);
3140 exit(EXIT_FAILURE);
3141 }
3142 }
3143
3144 /* -oX <list>: Override local_interfaces and/or default daemon ports */
3145
3146 else if (Ustrcmp(argrest, "X") == 0)
3147 override_local_interfaces = argv[++i];
3148
3149 /* Unknown -o argument */
3150
3151 else badarg = TRUE;
3152 break;
3153
3154
3155 /* -ps: force Perl startup; -pd force delayed Perl startup */
3156
3157 case 'p':
3158 #ifdef EXIM_PERL
3159 if (*argrest == 's' && argrest[1] == 0)
3160 {
3161 perl_start_option = 1;
3162 break;
3163 }
3164 if (*argrest == 'd' && argrest[1] == 0)
3165 {
3166 perl_start_option = -1;
3167 break;
3168 }
3169 #endif
3170
3171 /* -panythingelse is taken as the Sendmail-compatible argument -prval:sval,
3172 which sets the host protocol and host name */
3173
3174 if (*argrest == 0)
3175 {
3176 if (i+1 < argc) argrest = argv[++i]; else
3177 { badarg = TRUE; break; }
3178 }
3179
3180 if (*argrest != 0)
3181 {
3182 uschar *hn = Ustrchr(argrest, ':');
3183 if (hn == NULL)
3184 {
3185 received_protocol = argrest;
3186 }
3187 else
3188 {
3189 received_protocol = string_copyn(argrest, hn - argrest);
3190 sender_host_name = hn + 1;
3191 }
3192 }
3193 break;
3194
3195
3196 case 'q':
3197 receiving_message = FALSE;
3198 if (queue_interval >= 0)
3199 {
3200 fprintf(stderr, "exim: -q specified more than once\n");
3201 exit(EXIT_FAILURE);
3202 }
3203
3204 /* -qq...: Do queue runs in a 2-stage manner */
3205
3206 if (*argrest == 'q')
3207 {
3208 queue_2stage = TRUE;
3209 argrest++;
3210 }
3211
3212 /* -qi...: Do only first (initial) deliveries */
3213
3214 if (*argrest == 'i')
3215 {
3216 queue_run_first_delivery = TRUE;
3217 argrest++;
3218 }
3219
3220 /* -qf...: Run the queue, forcing deliveries
3221 -qff..: Ditto, forcing thawing as well */
3222
3223 if (*argrest == 'f')
3224 {
3225 queue_run_force = TRUE;
3226 if (*++argrest == 'f')
3227 {
3228 deliver_force_thaw = TRUE;
3229 argrest++;
3230 }
3231 }
3232
3233 /* -q[f][f]l...: Run the queue only on local deliveries */
3234
3235 if (*argrest == 'l')
3236 {
3237 queue_run_local = TRUE;
3238 argrest++;
3239 }
3240
3241 /* -q[f][f][l][G<name>]... Work on the named queue */
3242
3243 if (*argrest == 'G')
3244 {
3245 int i;
3246 for (argrest++, i = 0; argrest[i] && argrest[i] != '/'; ) i++;
3247 queue_name = string_copyn(argrest, i);
3248 argrest += i;
3249 if (*argrest == '/') argrest++;
3250 }
3251
3252 /* -q[f][f][l][G<name>]: Run the queue, optionally forced, optionally local
3253 only, optionally named, optionally starting from a given message id. */
3254
3255 if (*argrest == 0 &&
3256 (i + 1 >= argc || argv[i+1][0] == '-' || mac_ismsgid(argv[i+1])))
3257 {
3258 queue_interval = 0;
3259 if (i+1 < argc && mac_ismsgid(argv[i+1]))
3260 start_queue_run_id = argv[++i];
3261 if (i+1 < argc && mac_ismsgid(argv[i+1]))
3262 stop_queue_run_id = argv[++i];
3263 }
3264
3265 /* -q[f][f][l][G<name>/]<n>: Run the queue at regular intervals, optionally
3266 forced, optionally local only, optionally named. */
3267
3268 else if ((queue_interval = readconf_readtime(*argrest ? argrest : argv[++i],
3269 0, FALSE)) <= 0)
3270 {
3271 fprintf(stderr, "exim: bad time value %s: abandoned\n", argv[i]);
3272 exit(EXIT_FAILURE);
3273 }
3274 break;
3275
3276
3277 case 'R': /* Synonymous with -qR... */
3278 receiving_message = FALSE;
3279
3280 /* -Rf: As -R (below) but force all deliveries,
3281 -Rff: Ditto, but also thaw all frozen messages,
3282 -Rr: String is regex
3283 -Rrf: Regex and force
3284 -Rrff: Regex and force and thaw
3285
3286 in all cases provided there are no further characters in this
3287 argument. */
3288
3289 if (*argrest != 0)
3290 {
3291 int i;
3292 for (i = 0; i < nelem(rsopts); i++)
3293 if (Ustrcmp(argrest, rsopts[i]) == 0)
3294 {
3295 if (i != 2) queue_run_force = TRUE;
3296 if (i >= 2) deliver_selectstring_regex = TRUE;
3297 if (i == 1 || i == 4) deliver_force_thaw = TRUE;
3298 argrest += Ustrlen(rsopts[i]);
3299 }
3300 }
3301
3302 /* -R: Set string to match in addresses for forced queue run to
3303 pick out particular messages. */
3304
3305 if (*argrest)
3306 deliver_selectstring = argrest;
3307 else if (i+1 < argc)
3308 deliver_selectstring = argv[++i];
3309 else
3310 {
3311 fprintf(stderr, "exim: string expected after -R\n");
3312 exit(EXIT_FAILURE);
3313 }
3314 break;
3315
3316
3317 /* -r: an obsolete synonym for -f (see above) */
3318
3319
3320 /* -S: Like -R but works on sender. */
3321
3322 case 'S': /* Synonymous with -qS... */
3323 receiving_message = FALSE;
3324
3325 /* -Sf: As -S (below) but force all deliveries,
3326 -Sff: Ditto, but also thaw all frozen messages,
3327 -Sr: String is regex
3328 -Srf: Regex and force
3329 -Srff: Regex and force and thaw
3330
3331 in all cases provided there are no further characters in this
3332 argument. */
3333
3334 if (*argrest)
3335 {
3336 int i;
3337 for (i = 0; i < nelem(rsopts); i++)
3338 if (Ustrcmp(argrest, rsopts[i]) == 0)
3339 {
3340 if (i != 2) queue_run_force = TRUE;
3341 if (i >= 2) deliver_selectstring_sender_regex = TRUE;
3342 if (i == 1 || i == 4) deliver_force_thaw = TRUE;
3343 argrest += Ustrlen(rsopts[i]);
3344 }
3345 }
3346
3347 /* -S: Set string to match in addresses for forced queue run to
3348 pick out particular messages. */
3349
3350 if (*argrest)
3351 deliver_selectstring_sender = argrest;
3352 else if (i+1 < argc)
3353 deliver_selectstring_sender = argv[++i];
3354 else
3355 {
3356 fprintf(stderr, "exim: string expected after -S\n");
3357 exit(EXIT_FAILURE);
3358 }
3359 break;
3360
3361 /* -Tqt is an option that is exclusively for use by the testing suite.
3362 It is not recognized in other circumstances. It allows for the setting up
3363 of explicit "queue times" so that various warning/retry things can be
3364 tested. Otherwise variability of clock ticks etc. cause problems. */
3365
3366 case 'T':
3367 if (running_in_test_harness && Ustrcmp(argrest, "qt") == 0)
3368 fudged_queue_times = argv[++i];
3369 else badarg = TRUE;
3370 break;
3371
3372
3373 /* -t: Set flag to extract recipients from body of message. */
3374
3375 case 't':
3376 if (*argrest == 0) extract_recipients = TRUE;
3377
3378 /* -ti: Set flag to extract recipients from body of message, and also
3379 specify that dot does not end the message. */
3380
3381 else if (Ustrcmp(argrest, "i") == 0)
3382 {
3383 extract_recipients = TRUE;
3384 dot_ends = FALSE;
3385 }
3386
3387 /* -tls-on-connect: don't wait for STARTTLS (for old clients) */
3388
3389 #ifdef SUPPORT_TLS
3390 else if (Ustrcmp(argrest, "ls-on-connect") == 0) tls_in.on_connect = TRUE;
3391 #endif
3392
3393 else badarg = TRUE;
3394 break;
3395
3396
3397 /* -U: This means "initial user submission" in sendmail, apparently. The
3398 doc claims that in future sendmail may refuse syntactically invalid
3399 messages instead of fixing them. For the moment, we just ignore it. */
3400
3401 case 'U':
3402 break;
3403
3404
3405 /* -v: verify things - this is a very low-level debugging */
3406
3407 case 'v':
3408 if (*argrest == 0)
3409 {
3410 debug_selector |= D_v;
3411 debug_file = stderr;
3412 }
3413 else badarg = TRUE;
3414 break;
3415
3416
3417 /* -x: AIX uses this to indicate some fancy 8-bit character stuff:
3418
3419 The -x flag tells the sendmail command that mail from a local
3420 mail program has National Language Support (NLS) extended characters
3421 in the body of the mail item. The sendmail command can send mail with
3422 extended NLS characters across networks that normally corrupts these
3423 8-bit characters.
3424
3425 As Exim is 8-bit clean, it just ignores this flag. */
3426
3427 case 'x':
3428 if (*argrest != 0) badarg = TRUE;
3429 break;
3430
3431 /* -X: in sendmail: takes one parameter, logfile, and sends debugging
3432 logs to that file. We swallow the parameter and otherwise ignore it. */
3433
3434 case 'X':
3435 if (*argrest == '\0')
3436 if (++i >= argc)
3437 {
3438 fprintf(stderr, "exim: string expected after -X\n");
3439 exit(EXIT_FAILURE);
3440 }
3441 break;
3442
3443 case 'z':
3444 if (*argrest == '\0')
3445 if (++i < argc) log_oneline = argv[i]; else
3446 {
3447 fprintf(stderr, "exim: file name expected after %s\n", argv[i-1]);
3448 exit(EXIT_FAILURE);
3449 }
3450 break;
3451
3452 /* All other initial characters are errors */
3453
3454 default:
3455 badarg = TRUE;
3456 break;
3457 } /* End of high-level switch statement */
3458
3459 /* Failed to recognize the option, or syntax error */
3460
3461 if (badarg)
3462 {
3463 fprintf(stderr, "exim abandoned: unknown, malformed, or incomplete "
3464 "option %s\n", arg);
3465 exit(EXIT_FAILURE);
3466 }
3467 }
3468
3469
3470 /* If -R or -S have been specified without -q, assume a single queue run. */
3471
3472 if ( (deliver_selectstring || deliver_selectstring_sender)
3473 && queue_interval < 0)
3474 queue_interval = 0;
3475
3476
3477 END_ARG:
3478 /* If usage_wanted is set we call the usage function - which never returns */
3479 if (usage_wanted) exim_usage(called_as);
3480
3481 /* Arguments have been processed. Check for incompatibilities. */
3482 if ((
3483 (smtp_input || extract_recipients || recipients_arg < argc) &&
3484 (daemon_listen || queue_interval >= 0 || bi_option ||
3485 test_retry_arg >= 0 || test_rewrite_arg >= 0 ||
3486 filter_test != FTEST_NONE || (msg_action_arg > 0 && !one_msg_action))
3487 ) ||
3488 (
3489 msg_action_arg > 0 &&
3490 (daemon_listen || queue_interval > 0 || list_options ||
3491 (checking && msg_action != MSG_LOAD) ||
3492 bi_option || test_retry_arg >= 0 || test_rewrite_arg >= 0)
3493 ) ||
3494 (
3495 (daemon_listen || queue_interval > 0) &&
3496 (sender_address != NULL || list_options || list_queue || checking ||
3497 bi_option)
3498 ) ||
3499 (
3500 daemon_listen && queue_interval == 0
3501 ) ||
3502 (
3503 inetd_wait_mode && queue_interval >= 0
3504 ) ||
3505 (
3506 list_options &&
3507 (checking || smtp_input || extract_recipients ||
3508 filter_test != FTEST_NONE || bi_option)
3509 ) ||
3510 (
3511 verify_address_mode &&
3512 (address_test_mode || smtp_input || extract_recipients ||
3513 filter_test != FTEST_NONE || bi_option)
3514 ) ||
3515 (
3516 address_test_mode && (smtp_input || extract_recipients ||
3517 filter_test != FTEST_NONE || bi_option)
3518 ) ||
3519 (
3520 smtp_input && (sender_address != NULL || filter_test != FTEST_NONE ||
3521 extract_recipients)
3522 ) ||
3523 (
3524 deliver_selectstring != NULL && queue_interval < 0
3525 ) ||
3526 (
3527 msg_action == MSG_LOAD &&
3528 (!expansion_test || expansion_test_message != NULL)
3529 )
3530 )
3531 {
3532 fprintf(stderr, "exim: incompatible command-line options or arguments\n");
3533 exit(EXIT_FAILURE);
3534 }
3535
3536 /* If debugging is set up, set the file and the file descriptor to pass on to
3537 child processes. It should, of course, be 2 for stderr. Also, force the daemon
3538 to run in the foreground. */
3539
3540 if (debug_selector != 0)
3541 {
3542 debug_file = stderr;
3543 debug