MacOS: fix egid problem
[exim.git] / src / src / exim.c
1 /*************************************************
2 * Exim - an Internet mail transport agent *
3 *************************************************/
4
5 /* Copyright (c) University of Cambridge 1995 - 2018 */
6 /* See the file NOTICE for conditions of use and distribution. */
7
8
9 /* The main function: entry point, initialization, and high-level control.
10 Also a few functions that don't naturally fit elsewhere. */
11
12
13 #include "exim.h"
14
15 #if defined(__GLIBC__) && !defined(__UCLIBC__)
16 # include <gnu/libc-version.h>
17 #endif
18
19 #ifdef USE_GNUTLS
20 # include <gnutls/gnutls.h>
21 # if GNUTLS_VERSION_NUMBER < 0x030103 && !defined(DISABLE_OCSP)
22 # define DISABLE_OCSP
23 # endif
24 #endif
25
26 extern void init_lookup_list(void);
27
28
29
30 /*************************************************
31 * Function interface to store functions *
32 *************************************************/
33
34 /* We need some real functions to pass to the PCRE regular expression library
35 for store allocation via Exim's store manager. The normal calls are actually
36 macros that pass over location information to make tracing easier. These
37 functions just interface to the standard macro calls. A good compiler will
38 optimize out the tail recursion and so not make them too expensive. There
39 are two sets of functions; one for use when we want to retain the compiled
40 regular expression for a long time; the other for short-term use. */
41
42 static void *
43 function_store_get(size_t size)
44 {
45 return store_get((int)size);
46 }
47
48 static void
49 function_dummy_free(void *block) { block = block; }
50
51 static void *
52 function_store_malloc(size_t size)
53 {
54 return store_malloc((int)size);
55 }
56
57 static void
58 function_store_free(void *block)
59 {
60 store_free(block);
61 }
62
63
64
65
66 /*************************************************
67 * Enums for cmdline interface *
68 *************************************************/
69
70 enum commandline_info { CMDINFO_NONE=0,
71 CMDINFO_HELP, CMDINFO_SIEVE, CMDINFO_DSCP };
72
73
74
75
76 /*************************************************
77 * Compile regular expression and panic on fail *
78 *************************************************/
79
80 /* This function is called when failure to compile a regular expression leads
81 to a panic exit. In other cases, pcre_compile() is called directly. In many
82 cases where this function is used, the results of the compilation are to be
83 placed in long-lived store, so we temporarily reset the store management
84 functions that PCRE uses if the use_malloc flag is set.
85
86 Argument:
87 pattern the pattern to compile
88 caseless TRUE if caseless matching is required
89 use_malloc TRUE if compile into malloc store
90
91 Returns: pointer to the compiled pattern
92 */
93
94 const pcre *
95 regex_must_compile(const uschar *pattern, BOOL caseless, BOOL use_malloc)
96 {
97 int offset;
98 int options = PCRE_COPT;
99 const pcre *yield;
100 const uschar *error;
101 if (use_malloc)
102 {
103 pcre_malloc = function_store_malloc;
104 pcre_free = function_store_free;
105 }
106 if (caseless) options |= PCRE_CASELESS;
107 yield = pcre_compile(CCS pattern, options, (const char **)&error, &offset, NULL);
108 pcre_malloc = function_store_get;
109 pcre_free = function_dummy_free;
110 if (yield == NULL)
111 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "regular expression error: "
112 "%s at offset %d while compiling %s", error, offset, pattern);
113 return yield;
114 }
115
116
117
118
119 /*************************************************
120 * Execute regular expression and set strings *
121 *************************************************/
122
123 /* This function runs a regular expression match, and sets up the pointers to
124 the matched substrings.
125
126 Arguments:
127 re the compiled expression
128 subject the subject string
129 options additional PCRE options
130 setup if < 0 do full setup
131 if >= 0 setup from setup+1 onwards,
132 excluding the full matched string
133
134 Returns: TRUE or FALSE
135 */
136
137 BOOL
138 regex_match_and_setup(const pcre *re, const uschar *subject, int options, int setup)
139 {
140 int ovector[3*(EXPAND_MAXN+1)];
141 uschar * s = string_copy(subject); /* de-constifying */
142 int n = pcre_exec(re, NULL, CS s, Ustrlen(s), 0,
143 PCRE_EOPT | options, ovector, sizeof(ovector)/sizeof(int));
144 BOOL yield = n >= 0;
145 if (n == 0) n = EXPAND_MAXN + 1;
146 if (yield)
147 {
148 int nn;
149 expand_nmax = (setup < 0)? 0 : setup + 1;
150 for (nn = (setup < 0)? 0 : 2; nn < n*2; nn += 2)
151 {
152 expand_nstring[expand_nmax] = s + ovector[nn];
153 expand_nlength[expand_nmax++] = ovector[nn+1] - ovector[nn];
154 }
155 expand_nmax--;
156 }
157 return yield;
158 }
159
160
161
162
163 /*************************************************
164 * Set up processing details *
165 *************************************************/
166
167 /* Save a text string for dumping when SIGUSR1 is received.
168 Do checks for overruns.
169
170 Arguments: format and arguments, as for printf()
171 Returns: nothing
172 */
173
174 void
175 set_process_info(const char *format, ...)
176 {
177 int len = sprintf(CS process_info, "%5d ", (int)getpid());
178 va_list ap;
179 va_start(ap, format);
180 if (!string_vformat(process_info + len, PROCESS_INFO_SIZE - len - 2, format, ap))
181 Ustrcpy(process_info + len, "**** string overflowed buffer ****");
182 len = Ustrlen(process_info);
183 process_info[len+0] = '\n';
184 process_info[len+1] = '\0';
185 process_info_len = len + 1;
186 DEBUG(D_process_info) debug_printf("set_process_info: %s", process_info);
187 va_end(ap);
188 }
189
190 /***********************************************
191 * Handler for SIGTERM *
192 ***********************************************/
193
194 static void
195 term_handler(int sig)
196 {
197 exit(1);
198 }
199
200
201 /*************************************************
202 * Handler for SIGUSR1 *
203 *************************************************/
204
205 /* SIGUSR1 causes any exim process to write to the process log details of
206 what it is currently doing. It will only be used if the OS is capable of
207 setting up a handler that causes automatic restarting of any system call
208 that is in progress at the time.
209
210 This function takes care to be signal-safe.
211
212 Argument: the signal number (SIGUSR1)
213 Returns: nothing
214 */
215
216 static void
217 usr1_handler(int sig)
218 {
219 int fd;
220
221 os_restarting_signal(sig, usr1_handler);
222
223 if ((fd = Uopen(process_log_path, O_APPEND|O_WRONLY, LOG_MODE)) < 0)
224 {
225 /* If we are already running as the Exim user, try to create it in the
226 current process (assuming spool_directory exists). Otherwise, if we are
227 root, do the creation in an exim:exim subprocess. */
228
229 int euid = geteuid();
230 if (euid == exim_uid)
231 fd = Uopen(process_log_path, O_CREAT|O_APPEND|O_WRONLY, LOG_MODE);
232 else if (euid == root_uid)
233 fd = log_create_as_exim(process_log_path);
234 }
235
236 /* If we are neither exim nor root, or if we failed to create the log file,
237 give up. There is not much useful we can do with errors, since we don't want
238 to disrupt whatever is going on outside the signal handler. */
239
240 if (fd < 0) return;
241
242 (void)write(fd, process_info, process_info_len);
243 (void)close(fd);
244 }
245
246
247
248 /*************************************************
249 * Timeout handler *
250 *************************************************/
251
252 /* This handler is enabled most of the time that Exim is running. The handler
253 doesn't actually get used unless alarm() has been called to set a timer, to
254 place a time limit on a system call of some kind. When the handler is run, it
255 re-enables itself.
256
257 There are some other SIGALRM handlers that are used in special cases when more
258 than just a flag setting is required; for example, when reading a message's
259 input. These are normally set up in the code module that uses them, and the
260 SIGALRM handler is reset to this one afterwards.
261
262 Argument: the signal value (SIGALRM)
263 Returns: nothing
264 */
265
266 void
267 sigalrm_handler(int sig)
268 {
269 sig = sig; /* Keep picky compilers happy */
270 sigalrm_seen = TRUE;
271 os_non_restarting_signal(SIGALRM, sigalrm_handler);
272 }
273
274
275
276 /*************************************************
277 * Sleep for a fractional time interval *
278 *************************************************/
279
280 /* This function is called by millisleep() and exim_wait_tick() to wait for a
281 period of time that may include a fraction of a second. The coding is somewhat
282 tedious. We do not expect setitimer() ever to fail, but if it does, the process
283 will wait for ever, so we panic in this instance. (There was a case of this
284 when a bug in a function that calls milliwait() caused it to pass invalid data.
285 That's when I added the check. :-)
286
287 We assume it to be not worth sleeping for under 100us; this value will
288 require revisiting as hardware advances. This avoids the issue of
289 a zero-valued timer setting meaning "never fire".
290
291 Argument: an itimerval structure containing the interval
292 Returns: nothing
293 */
294
295 static void
296 milliwait(struct itimerval *itval)
297 {
298 sigset_t sigmask;
299 sigset_t old_sigmask;
300
301 if (itval->it_value.tv_usec < 100 && itval->it_value.tv_sec == 0)
302 return;
303 (void)sigemptyset(&sigmask); /* Empty mask */
304 (void)sigaddset(&sigmask, SIGALRM); /* Add SIGALRM */
305 (void)sigprocmask(SIG_BLOCK, &sigmask, &old_sigmask); /* Block SIGALRM */
306 if (setitimer(ITIMER_REAL, itval, NULL) < 0) /* Start timer */
307 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
308 "setitimer() failed: %s", strerror(errno));
309 (void)sigfillset(&sigmask); /* All signals */
310 (void)sigdelset(&sigmask, SIGALRM); /* Remove SIGALRM */
311 (void)sigsuspend(&sigmask); /* Until SIGALRM */
312 (void)sigprocmask(SIG_SETMASK, &old_sigmask, NULL); /* Restore mask */
313 }
314
315
316
317
318 /*************************************************
319 * Millisecond sleep function *
320 *************************************************/
321
322 /* The basic sleep() function has a granularity of 1 second, which is too rough
323 in some cases - for example, when using an increasing delay to slow down
324 spammers.
325
326 Argument: number of millseconds
327 Returns: nothing
328 */
329
330 void
331 millisleep(int msec)
332 {
333 struct itimerval itval;
334 itval.it_interval.tv_sec = 0;
335 itval.it_interval.tv_usec = 0;
336 itval.it_value.tv_sec = msec/1000;
337 itval.it_value.tv_usec = (msec % 1000) * 1000;
338 milliwait(&itval);
339 }
340
341
342
343 /*************************************************
344 * Compare microsecond times *
345 *************************************************/
346
347 /*
348 Arguments:
349 tv1 the first time
350 tv2 the second time
351
352 Returns: -1, 0, or +1
353 */
354
355 static int
356 exim_tvcmp(struct timeval *t1, struct timeval *t2)
357 {
358 if (t1->tv_sec > t2->tv_sec) return +1;
359 if (t1->tv_sec < t2->tv_sec) return -1;
360 if (t1->tv_usec > t2->tv_usec) return +1;
361 if (t1->tv_usec < t2->tv_usec) return -1;
362 return 0;
363 }
364
365
366
367
368 /*************************************************
369 * Clock tick wait function *
370 *************************************************/
371
372 /* Exim uses a time + a pid to generate a unique identifier in two places: its
373 message IDs, and in file names for maildir deliveries. Because some OS now
374 re-use pids within the same second, sub-second times are now being used.
375 However, for absolute certainty, we must ensure the clock has ticked before
376 allowing the relevant process to complete. At the time of implementation of
377 this code (February 2003), the speed of processors is such that the clock will
378 invariably have ticked already by the time a process has done its job. This
379 function prepares for the time when things are faster - and it also copes with
380 clocks that go backwards.
381
382 Arguments:
383 then_tv A timeval which was used to create uniqueness; its usec field
384 has been rounded down to the value of the resolution.
385 We want to be sure the current time is greater than this.
386 resolution The resolution that was used to divide the microseconds
387 (1 for maildir, larger for message ids)
388
389 Returns: nothing
390 */
391
392 void
393 exim_wait_tick(struct timeval *then_tv, int resolution)
394 {
395 struct timeval now_tv;
396 long int now_true_usec;
397
398 (void)gettimeofday(&now_tv, NULL);
399 now_true_usec = now_tv.tv_usec;
400 now_tv.tv_usec = (now_true_usec/resolution) * resolution;
401
402 if (exim_tvcmp(&now_tv, then_tv) <= 0)
403 {
404 struct itimerval itval;
405 itval.it_interval.tv_sec = 0;
406 itval.it_interval.tv_usec = 0;
407 itval.it_value.tv_sec = then_tv->tv_sec - now_tv.tv_sec;
408 itval.it_value.tv_usec = then_tv->tv_usec + resolution - now_true_usec;
409
410 /* We know that, overall, "now" is less than or equal to "then". Therefore, a
411 negative value for the microseconds is possible only in the case when "now"
412 is more than a second less than "then". That means that itval.it_value.tv_sec
413 is greater than zero. The following correction is therefore safe. */
414
415 if (itval.it_value.tv_usec < 0)
416 {
417 itval.it_value.tv_usec += 1000000;
418 itval.it_value.tv_sec -= 1;
419 }
420
421 DEBUG(D_transport|D_receive)
422 {
423 if (!f.running_in_test_harness)
424 {
425 debug_printf("tick check: " TIME_T_FMT ".%06lu " TIME_T_FMT ".%06lu\n",
426 then_tv->tv_sec, (long) then_tv->tv_usec,
427 now_tv.tv_sec, (long) now_tv.tv_usec);
428 debug_printf("waiting " TIME_T_FMT ".%06lu\n",
429 itval.it_value.tv_sec, (long) itval.it_value.tv_usec);
430 }
431 }
432
433 milliwait(&itval);
434 }
435 }
436
437
438
439
440 /*************************************************
441 * Call fopen() with umask 777 and adjust mode *
442 *************************************************/
443
444 /* Exim runs with umask(0) so that files created with open() have the mode that
445 is specified in the open() call. However, there are some files, typically in
446 the spool directory, that are created with fopen(). They end up world-writeable
447 if no precautions are taken. Although the spool directory is not accessible to
448 the world, this is an untidiness. So this is a wrapper function for fopen()
449 that sorts out the mode of the created file.
450
451 Arguments:
452 filename the file name
453 options the fopen() options
454 mode the required mode
455
456 Returns: the fopened FILE or NULL
457 */
458
459 FILE *
460 modefopen(const uschar *filename, const char *options, mode_t mode)
461 {
462 mode_t saved_umask = umask(0777);
463 FILE *f = Ufopen(filename, options);
464 (void)umask(saved_umask);
465 if (f != NULL) (void)fchmod(fileno(f), mode);
466 return f;
467 }
468
469
470
471
472 /*************************************************
473 * Ensure stdin, stdout, and stderr exist *
474 *************************************************/
475
476 /* Some operating systems grumble if an exec() happens without a standard
477 input, output, and error (fds 0, 1, 2) being defined. The worry is that some
478 file will be opened and will use these fd values, and then some other bit of
479 code will assume, for example, that it can write error messages to stderr.
480 This function ensures that fds 0, 1, and 2 are open if they do not already
481 exist, by connecting them to /dev/null.
482
483 This function is also used to ensure that std{in,out,err} exist at all times,
484 so that if any library that Exim calls tries to use them, it doesn't crash.
485
486 Arguments: None
487 Returns: Nothing
488 */
489
490 void
491 exim_nullstd(void)
492 {
493 int i;
494 int devnull = -1;
495 struct stat statbuf;
496 for (i = 0; i <= 2; i++)
497 {
498 if (fstat(i, &statbuf) < 0 && errno == EBADF)
499 {
500 if (devnull < 0) devnull = open("/dev/null", O_RDWR);
501 if (devnull < 0) log_write(0, LOG_MAIN|LOG_PANIC_DIE, "%s",
502 string_open_failed(errno, "/dev/null"));
503 if (devnull != i) (void)dup2(devnull, i);
504 }
505 }
506 if (devnull > 2) (void)close(devnull);
507 }
508
509
510
511
512 /*************************************************
513 * Close unwanted file descriptors for delivery *
514 *************************************************/
515
516 /* This function is called from a new process that has been forked to deliver
517 an incoming message, either directly, or using exec.
518
519 We want any smtp input streams to be closed in this new process. However, it
520 has been observed that using fclose() here causes trouble. When reading in -bS
521 input, duplicate copies of messages have been seen. The files will be sharing a
522 file pointer with the parent process, and it seems that fclose() (at least on
523 some systems - I saw this on Solaris 2.5.1) messes with that file pointer, at
524 least sometimes. Hence we go for closing the underlying file descriptors.
525
526 If TLS is active, we want to shut down the TLS library, but without molesting
527 the parent's SSL connection.
528
529 For delivery of a non-SMTP message, we want to close stdin and stdout (and
530 stderr unless debugging) because the calling process might have set them up as
531 pipes and be waiting for them to close before it waits for the submission
532 process to terminate. If they aren't closed, they hold up the calling process
533 until the initial delivery process finishes, which is not what we want.
534
535 Exception: We do want it for synchronous delivery!
536
537 And notwithstanding all the above, if D_resolver is set, implying resolver
538 debugging, leave stdout open, because that's where the resolver writes its
539 debugging output.
540
541 When we close stderr (which implies we've also closed stdout), we also get rid
542 of any controlling terminal.
543
544 Arguments: None
545 Returns: Nothing
546 */
547
548 static void
549 close_unwanted(void)
550 {
551 if (smtp_input)
552 {
553 #ifdef SUPPORT_TLS
554 tls_close(NULL, TLS_NO_SHUTDOWN); /* Shut down the TLS library */
555 #endif
556 (void)close(fileno(smtp_in));
557 (void)close(fileno(smtp_out));
558 smtp_in = NULL;
559 }
560 else
561 {
562 (void)close(0); /* stdin */
563 if ((debug_selector & D_resolver) == 0) (void)close(1); /* stdout */
564 if (debug_selector == 0) /* stderr */
565 {
566 if (!f.synchronous_delivery)
567 {
568 (void)close(2);
569 log_stderr = NULL;
570 }
571 (void)setsid();
572 }
573 }
574 }
575
576
577
578
579 /*************************************************
580 * Set uid and gid *
581 *************************************************/
582
583 /* This function sets a new uid and gid permanently, optionally calling
584 initgroups() to set auxiliary groups. There are some special cases when running
585 Exim in unprivileged modes. In these situations the effective uid will not be
586 root; if we already have the right effective uid/gid, and don't need to
587 initialize any groups, leave things as they are.
588
589 Arguments:
590 uid the uid
591 gid the gid
592 igflag TRUE if initgroups() wanted
593 msg text to use in debugging output and failure log
594
595 Returns: nothing; bombs out on failure
596 */
597
598 void
599 exim_setugid(uid_t uid, gid_t gid, BOOL igflag, uschar *msg)
600 {
601 uid_t euid = geteuid();
602 gid_t egid = getegid();
603
604 if (euid == root_uid || euid != uid || egid != gid || igflag)
605 {
606 /* At least one OS returns +1 for initgroups failure, so just check for
607 non-zero. */
608
609 if (igflag)
610 {
611 struct passwd *pw = getpwuid(uid);
612 if (!pw)
613 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "cannot run initgroups(): "
614 "no passwd entry for uid=%ld", (long int)uid);
615
616 if (initgroups(pw->pw_name, gid) != 0)
617 log_write(0,LOG_MAIN|LOG_PANIC_DIE,"initgroups failed for uid=%ld: %s",
618 (long int)uid, strerror(errno));
619 }
620
621 if (setgid(gid) < 0 || setuid(uid) < 0)
622 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "unable to set gid=%ld or uid=%ld "
623 "(euid=%ld): %s", (long int)gid, (long int)uid, (long int)euid, msg);
624 }
625
626 /* Debugging output included uid/gid and all groups */
627
628 DEBUG(D_uid)
629 {
630 int group_count, save_errno;
631 gid_t group_list[EXIM_GROUPLIST_SIZE];
632 debug_printf("changed uid/gid: %s\n uid=%ld gid=%ld pid=%ld\n", msg,
633 (long int)geteuid(), (long int)getegid(), (long int)getpid());
634 group_count = getgroups(nelem(group_list), group_list);
635 save_errno = errno;
636 debug_printf(" auxiliary group list:");
637 if (group_count > 0)
638 {
639 int i;
640 for (i = 0; i < group_count; i++) debug_printf(" %d", (int)group_list[i]);
641 }
642 else if (group_count < 0)
643 debug_printf(" <error: %s>", strerror(save_errno));
644 else debug_printf(" <none>");
645 debug_printf("\n");
646 }
647 }
648
649
650
651
652 /*************************************************
653 * Exit point *
654 *************************************************/
655
656 /* Exim exits via this function so that it always clears up any open
657 databases.
658
659 Arguments:
660 rc return code
661
662 Returns: does not return
663 */
664
665 void
666 exim_exit(int rc, const uschar * process)
667 {
668 search_tidyup();
669 DEBUG(D_any)
670 debug_printf(">>>>>>>>>>>>>>>> Exim pid=%d %s%s%sterminating with rc=%d "
671 ">>>>>>>>>>>>>>>>\n", (int)getpid(),
672 process ? "(" : "", process, process ? ") " : "", rc);
673 exit(rc);
674 }
675
676
677
678 /* Print error string, then die */
679 static void
680 exim_fail(const char * fmt, ...)
681 {
682 va_list ap;
683 va_start(ap, fmt);
684 vfprintf(stderr, fmt, ap);
685 exit(EXIT_FAILURE);
686 }
687
688
689
690 /*************************************************
691 * Extract port from host address *
692 *************************************************/
693
694 /* Called to extract the port from the values given to -oMa and -oMi.
695 It also checks the syntax of the address, and terminates it before the
696 port data when a port is extracted.
697
698 Argument:
699 address the address, with possible port on the end
700
701 Returns: the port, or zero if there isn't one
702 bombs out on a syntax error
703 */
704
705 static int
706 check_port(uschar *address)
707 {
708 int port = host_address_extract_port(address);
709 if (string_is_ip_address(address, NULL) == 0)
710 exim_fail("exim abandoned: \"%s\" is not an IP address\n", address);
711 return port;
712 }
713
714
715
716 /*************************************************
717 * Test/verify an address *
718 *************************************************/
719
720 /* This function is called by the -bv and -bt code. It extracts a working
721 address from a full RFC 822 address. This isn't really necessary per se, but it
722 has the effect of collapsing source routes.
723
724 Arguments:
725 s the address string
726 flags flag bits for verify_address()
727 exit_value to be set for failures
728
729 Returns: nothing
730 */
731
732 static void
733 test_address(uschar *s, int flags, int *exit_value)
734 {
735 int start, end, domain;
736 uschar *parse_error = NULL;
737 uschar *address = parse_extract_address(s, &parse_error, &start, &end, &domain,
738 FALSE);
739 if (address == NULL)
740 {
741 fprintf(stdout, "syntax error: %s\n", parse_error);
742 *exit_value = 2;
743 }
744 else
745 {
746 int rc = verify_address(deliver_make_addr(address,TRUE), stdout, flags, -1,
747 -1, -1, NULL, NULL, NULL);
748 if (rc == FAIL) *exit_value = 2;
749 else if (rc == DEFER && *exit_value == 0) *exit_value = 1;
750 }
751 }
752
753
754
755 /*************************************************
756 * Show supported features *
757 *************************************************/
758
759 static void
760 show_db_version(FILE * f)
761 {
762 #ifdef DB_VERSION_STRING
763 DEBUG(D_any)
764 {
765 fprintf(f, "Library version: BDB: Compile: %s\n", DB_VERSION_STRING);
766 fprintf(f, " Runtime: %s\n",
767 db_version(NULL, NULL, NULL));
768 }
769 else
770 fprintf(f, "Berkeley DB: %s\n", DB_VERSION_STRING);
771
772 #elif defined(BTREEVERSION) && defined(HASHVERSION)
773 #ifdef USE_DB
774 fprintf(f, "Probably Berkeley DB version 1.8x (native mode)\n");
775 #else
776 fprintf(f, "Probably Berkeley DB version 1.8x (compatibility mode)\n");
777 #endif
778
779 #elif defined(_DBM_RDONLY) || defined(dbm_dirfno)
780 fprintf(f, "Probably ndbm\n");
781 #elif defined(USE_TDB)
782 fprintf(f, "Using tdb\n");
783 #else
784 #ifdef USE_GDBM
785 fprintf(f, "Probably GDBM (native mode)\n");
786 #else
787 fprintf(f, "Probably GDBM (compatibility mode)\n");
788 #endif
789 #endif
790 }
791
792
793 /* This function is called for -bV/--version and for -d to output the optional
794 features of the current Exim binary.
795
796 Arguments: a FILE for printing
797 Returns: nothing
798 */
799
800 static void
801 show_whats_supported(FILE * fp)
802 {
803 auth_info * authi;
804
805 DEBUG(D_any) {} else show_db_version(fp);
806
807 fprintf(fp, "Support for:");
808 #ifdef SUPPORT_CRYPTEQ
809 fprintf(fp, " crypteq");
810 #endif
811 #if HAVE_ICONV
812 fprintf(fp, " iconv()");
813 #endif
814 #if HAVE_IPV6
815 fprintf(fp, " IPv6");
816 #endif
817 #ifdef HAVE_SETCLASSRESOURCES
818 fprintf(fp, " use_setclassresources");
819 #endif
820 #ifdef SUPPORT_PAM
821 fprintf(fp, " PAM");
822 #endif
823 #ifdef EXIM_PERL
824 fprintf(fp, " Perl");
825 #endif
826 #ifdef EXPAND_DLFUNC
827 fprintf(fp, " Expand_dlfunc");
828 #endif
829 #ifdef USE_TCP_WRAPPERS
830 fprintf(fp, " TCPwrappers");
831 #endif
832 #ifdef SUPPORT_TLS
833 # ifdef USE_GNUTLS
834 fprintf(fp, " GnuTLS");
835 # else
836 fprintf(fp, " OpenSSL");
837 # endif
838 #endif
839 #ifdef SUPPORT_TRANSLATE_IP_ADDRESS
840 fprintf(fp, " translate_ip_address");
841 #endif
842 #ifdef SUPPORT_MOVE_FROZEN_MESSAGES
843 fprintf(fp, " move_frozen_messages");
844 #endif
845 #ifdef WITH_CONTENT_SCAN
846 fprintf(fp, " Content_Scanning");
847 #endif
848 #ifdef SUPPORT_DANE
849 fprintf(fp, " DANE");
850 #endif
851 #ifndef DISABLE_DKIM
852 fprintf(fp, " DKIM");
853 #endif
854 #ifndef DISABLE_DNSSEC
855 fprintf(fp, " DNSSEC");
856 #endif
857 #ifndef DISABLE_EVENT
858 fprintf(fp, " Event");
859 #endif
860 #ifdef SUPPORT_I18N
861 fprintf(fp, " I18N");
862 #endif
863 #ifndef DISABLE_OCSP
864 fprintf(fp, " OCSP");
865 #endif
866 #ifndef DISABLE_PRDR
867 fprintf(fp, " PRDR");
868 #endif
869 #ifdef SUPPORT_PROXY
870 fprintf(fp, " PROXY");
871 #endif
872 #ifdef SUPPORT_SOCKS
873 fprintf(fp, " SOCKS");
874 #endif
875 #ifdef SUPPORT_SPF
876 fprintf(fp, " SPF");
877 #endif
878 #ifdef TCP_FASTOPEN
879 deliver_init();
880 if (f.tcp_fastopen_ok) fprintf(fp, " TCP_Fast_Open");
881 #endif
882 #ifdef EXPERIMENTAL_LMDB
883 fprintf(fp, " Experimental_LMDB");
884 #endif
885 #ifdef EXPERIMENTAL_QUEUEFILE
886 fprintf(fp, " Experimental_QUEUEFILE");
887 #endif
888 #ifdef EXPERIMENTAL_SRS
889 fprintf(fp, " Experimental_SRS");
890 #endif
891 #ifdef EXPERIMENTAL_ARC
892 fprintf(fp, " Experimental_ARC");
893 #endif
894 #ifdef EXPERIMENTAL_BRIGHTMAIL
895 fprintf(fp, " Experimental_Brightmail");
896 #endif
897 #ifdef EXPERIMENTAL_DCC
898 fprintf(fp, " Experimental_DCC");
899 #endif
900 #ifdef EXPERIMENTAL_DMARC
901 fprintf(fp, " Experimental_DMARC");
902 #endif
903 #ifdef EXPERIMENTAL_DSN_INFO
904 fprintf(fp, " Experimental_DSN_info");
905 #endif
906 #ifdef EXPERIMENTAL_REQUIRETLS
907 fprintf(fp, " Experimental_REQUIRETLS");
908 #endif
909 fprintf(fp, "\n");
910
911 fprintf(fp, "Lookups (built-in):");
912 #if defined(LOOKUP_LSEARCH) && LOOKUP_LSEARCH!=2
913 fprintf(fp, " lsearch wildlsearch nwildlsearch iplsearch");
914 #endif
915 #if defined(LOOKUP_CDB) && LOOKUP_CDB!=2
916 fprintf(fp, " cdb");
917 #endif
918 #if defined(LOOKUP_DBM) && LOOKUP_DBM!=2
919 fprintf(fp, " dbm dbmjz dbmnz");
920 #endif
921 #if defined(LOOKUP_DNSDB) && LOOKUP_DNSDB!=2
922 fprintf(fp, " dnsdb");
923 #endif
924 #if defined(LOOKUP_DSEARCH) && LOOKUP_DSEARCH!=2
925 fprintf(fp, " dsearch");
926 #endif
927 #if defined(LOOKUP_IBASE) && LOOKUP_IBASE!=2
928 fprintf(fp, " ibase");
929 #endif
930 #if defined(LOOKUP_LDAP) && LOOKUP_LDAP!=2
931 fprintf(fp, " ldap ldapdn ldapm");
932 #endif
933 #ifdef EXPERIMENTAL_LMDB
934 fprintf(fp, " lmdb");
935 #endif
936 #if defined(LOOKUP_MYSQL) && LOOKUP_MYSQL!=2
937 fprintf(fp, " mysql");
938 #endif
939 #if defined(LOOKUP_NIS) && LOOKUP_NIS!=2
940 fprintf(fp, " nis nis0");
941 #endif
942 #if defined(LOOKUP_NISPLUS) && LOOKUP_NISPLUS!=2
943 fprintf(fp, " nisplus");
944 #endif
945 #if defined(LOOKUP_ORACLE) && LOOKUP_ORACLE!=2
946 fprintf(fp, " oracle");
947 #endif
948 #if defined(LOOKUP_PASSWD) && LOOKUP_PASSWD!=2
949 fprintf(fp, " passwd");
950 #endif
951 #if defined(LOOKUP_PGSQL) && LOOKUP_PGSQL!=2
952 fprintf(fp, " pgsql");
953 #endif
954 #if defined(LOOKUP_REDIS) && LOOKUP_REDIS!=2
955 fprintf(fp, " redis");
956 #endif
957 #if defined(LOOKUP_SQLITE) && LOOKUP_SQLITE!=2
958 fprintf(fp, " sqlite");
959 #endif
960 #if defined(LOOKUP_TESTDB) && LOOKUP_TESTDB!=2
961 fprintf(fp, " testdb");
962 #endif
963 #if defined(LOOKUP_WHOSON) && LOOKUP_WHOSON!=2
964 fprintf(fp, " whoson");
965 #endif
966 fprintf(fp, "\n");
967
968 auth_show_supported(fp);
969 route_show_supported(fp);
970 transport_show_supported(fp);
971
972 #ifdef WITH_CONTENT_SCAN
973 malware_show_supported(fp);
974 #endif
975
976 if (fixed_never_users[0] > 0)
977 {
978 int i;
979 fprintf(fp, "Fixed never_users: ");
980 for (i = 1; i <= (int)fixed_never_users[0] - 1; i++)
981 fprintf(fp, "%d:", (unsigned int)fixed_never_users[i]);
982 fprintf(fp, "%d\n", (unsigned int)fixed_never_users[i]);
983 }
984
985 fprintf(fp, "Configure owner: %d:%d\n", config_uid, config_gid);
986
987 fprintf(fp, "Size of off_t: " SIZE_T_FMT "\n", sizeof(off_t));
988
989 /* Everything else is details which are only worth reporting when debugging.
990 Perhaps the tls_version_report should move into this too. */
991 DEBUG(D_any) do {
992
993 int i;
994
995 /* clang defines __GNUC__ (at least, for me) so test for it first */
996 #if defined(__clang__)
997 fprintf(fp, "Compiler: CLang [%s]\n", __clang_version__);
998 #elif defined(__GNUC__)
999 fprintf(fp, "Compiler: GCC [%s]\n",
1000 # ifdef __VERSION__
1001 __VERSION__
1002 # else
1003 "? unknown version ?"
1004 # endif
1005 );
1006 #else
1007 fprintf(fp, "Compiler: <unknown>\n");
1008 #endif
1009
1010 #if defined(__GLIBC__) && !defined(__UCLIBC__)
1011 fprintf(fp, "Library version: Glibc: Compile: %d.%d\n",
1012 __GLIBC__, __GLIBC_MINOR__);
1013 if (__GLIBC_PREREQ(2, 1))
1014 fprintf(fp, " Runtime: %s\n",
1015 gnu_get_libc_version());
1016 #endif
1017
1018 show_db_version(fp);
1019
1020 #ifdef SUPPORT_TLS
1021 tls_version_report(fp);
1022 #endif
1023 #ifdef SUPPORT_I18N
1024 utf8_version_report(fp);
1025 #endif
1026
1027 for (authi = auths_available; *authi->driver_name != '\0'; ++authi)
1028 if (authi->version_report)
1029 (*authi->version_report)(fp);
1030
1031 /* PCRE_PRERELEASE is either defined and empty or a bare sequence of
1032 characters; unless it's an ancient version of PCRE in which case it
1033 is not defined. */
1034 #ifndef PCRE_PRERELEASE
1035 # define PCRE_PRERELEASE
1036 #endif
1037 #define QUOTE(X) #X
1038 #define EXPAND_AND_QUOTE(X) QUOTE(X)
1039 fprintf(fp, "Library version: PCRE: Compile: %d.%d%s\n"
1040 " Runtime: %s\n",
1041 PCRE_MAJOR, PCRE_MINOR,
1042 EXPAND_AND_QUOTE(PCRE_PRERELEASE) "",
1043 pcre_version());
1044 #undef QUOTE
1045 #undef EXPAND_AND_QUOTE
1046
1047 init_lookup_list();
1048 for (i = 0; i < lookup_list_count; i++)
1049 if (lookup_list[i]->version_report)
1050 lookup_list[i]->version_report(fp);
1051
1052 #ifdef WHITELIST_D_MACROS
1053 fprintf(fp, "WHITELIST_D_MACROS: \"%s\"\n", WHITELIST_D_MACROS);
1054 #else
1055 fprintf(fp, "WHITELIST_D_MACROS unset\n");
1056 #endif
1057 #ifdef TRUSTED_CONFIG_LIST
1058 fprintf(fp, "TRUSTED_CONFIG_LIST: \"%s\"\n", TRUSTED_CONFIG_LIST);
1059 #else
1060 fprintf(fp, "TRUSTED_CONFIG_LIST unset\n");
1061 #endif
1062
1063 } while (0);
1064 }
1065
1066
1067 /*************************************************
1068 * Show auxiliary information about Exim *
1069 *************************************************/
1070
1071 static void
1072 show_exim_information(enum commandline_info request, FILE *stream)
1073 {
1074 const uschar **pp;
1075
1076 switch(request)
1077 {
1078 case CMDINFO_NONE:
1079 fprintf(stream, "Oops, something went wrong.\n");
1080 return;
1081 case CMDINFO_HELP:
1082 fprintf(stream,
1083 "The -bI: flag takes a string indicating which information to provide.\n"
1084 "If the string is not recognised, you'll get this help (on stderr).\n"
1085 "\n"
1086 " exim -bI:help this information\n"
1087 " exim -bI:dscp list of known dscp value keywords\n"
1088 " exim -bI:sieve list of supported sieve extensions\n"
1089 );
1090 return;
1091 case CMDINFO_SIEVE:
1092 for (pp = exim_sieve_extension_list; *pp; ++pp)
1093 fprintf(stream, "%s\n", *pp);
1094 return;
1095 case CMDINFO_DSCP:
1096 dscp_list_to_stream(stream);
1097 return;
1098 }
1099 }
1100
1101
1102 /*************************************************
1103 * Quote a local part *
1104 *************************************************/
1105
1106 /* This function is used when a sender address or a From: or Sender: header
1107 line is being created from the caller's login, or from an authenticated_id. It
1108 applies appropriate quoting rules for a local part.
1109
1110 Argument: the local part
1111 Returns: the local part, quoted if necessary
1112 */
1113
1114 uschar *
1115 local_part_quote(uschar *lpart)
1116 {
1117 BOOL needs_quote = FALSE;
1118 gstring * g;
1119 uschar *t;
1120
1121 for (t = lpart; !needs_quote && *t != 0; t++)
1122 {
1123 needs_quote = !isalnum(*t) && strchr("!#$%&'*+-/=?^_`{|}~", *t) == NULL &&
1124 (*t != '.' || t == lpart || t[1] == 0);
1125 }
1126
1127 if (!needs_quote) return lpart;
1128
1129 g = string_catn(NULL, US"\"", 1);
1130
1131 for (;;)
1132 {
1133 uschar *nq = US Ustrpbrk(lpart, "\\\"");
1134 if (nq == NULL)
1135 {
1136 g = string_cat(g, lpart);
1137 break;
1138 }
1139 g = string_catn(g, lpart, nq - lpart);
1140 g = string_catn(g, US"\\", 1);
1141 g = string_catn(g, nq, 1);
1142 lpart = nq + 1;
1143 }
1144
1145 g = string_catn(g, US"\"", 1);
1146 return string_from_gstring(g);
1147 }
1148
1149
1150
1151 #ifdef USE_READLINE
1152 /*************************************************
1153 * Load readline() functions *
1154 *************************************************/
1155
1156 /* This function is called from testing executions that read data from stdin,
1157 but only when running as the calling user. Currently, only -be does this. The
1158 function loads the readline() function library and passes back the functions.
1159 On some systems, it needs the curses library, so load that too, but try without
1160 it if loading fails. All this functionality has to be requested at build time.
1161
1162 Arguments:
1163 fn_readline_ptr pointer to where to put the readline pointer
1164 fn_addhist_ptr pointer to where to put the addhistory function
1165
1166 Returns: the dlopen handle or NULL on failure
1167 */
1168
1169 static void *
1170 set_readline(char * (**fn_readline_ptr)(const char *),
1171 void (**fn_addhist_ptr)(const char *))
1172 {
1173 void *dlhandle;
1174 void *dlhandle_curses = dlopen("libcurses." DYNLIB_FN_EXT, RTLD_GLOBAL|RTLD_LAZY);
1175
1176 dlhandle = dlopen("libreadline." DYNLIB_FN_EXT, RTLD_GLOBAL|RTLD_NOW);
1177 if (dlhandle_curses != NULL) dlclose(dlhandle_curses);
1178
1179 if (dlhandle != NULL)
1180 {
1181 /* Checked manual pages; at least in GNU Readline 6.1, the prototypes are:
1182 * char * readline (const char *prompt);
1183 * void add_history (const char *string);
1184 */
1185 *fn_readline_ptr = (char *(*)(const char*))dlsym(dlhandle, "readline");
1186 *fn_addhist_ptr = (void(*)(const char*))dlsym(dlhandle, "add_history");
1187 }
1188 else
1189 {
1190 DEBUG(D_any) debug_printf("failed to load readline: %s\n", dlerror());
1191 }
1192
1193 return dlhandle;
1194 }
1195 #endif
1196
1197
1198
1199 /*************************************************
1200 * Get a line from stdin for testing things *
1201 *************************************************/
1202
1203 /* This function is called when running tests that can take a number of lines
1204 of input (for example, -be and -bt). It handles continuations and trailing
1205 spaces. And prompting and a blank line output on eof. If readline() is in use,
1206 the arguments are non-NULL and provide the relevant functions.
1207
1208 Arguments:
1209 fn_readline readline function or NULL
1210 fn_addhist addhist function or NULL
1211
1212 Returns: pointer to dynamic memory, or NULL at end of file
1213 */
1214
1215 static uschar *
1216 get_stdinput(char *(*fn_readline)(const char *), void(*fn_addhist)(const char *))
1217 {
1218 int i;
1219 gstring * g = NULL;
1220
1221 if (!fn_readline) { printf("> "); fflush(stdout); }
1222
1223 for (i = 0;; i++)
1224 {
1225 uschar buffer[1024];
1226 uschar *p, *ss;
1227
1228 #ifdef USE_READLINE
1229 char *readline_line = NULL;
1230 if (fn_readline != NULL)
1231 {
1232 if ((readline_line = fn_readline((i > 0)? "":"> ")) == NULL) break;
1233 if (*readline_line != 0 && fn_addhist != NULL) fn_addhist(readline_line);
1234 p = US readline_line;
1235 }
1236 else
1237 #endif
1238
1239 /* readline() not in use */
1240
1241 {
1242 if (Ufgets(buffer, sizeof(buffer), stdin) == NULL) break;
1243 p = buffer;
1244 }
1245
1246 /* Handle the line */
1247
1248 ss = p + (int)Ustrlen(p);
1249 while (ss > p && isspace(ss[-1])) ss--;
1250
1251 if (i > 0)
1252 {
1253 while (p < ss && isspace(*p)) p++; /* leading space after cont */
1254 }
1255
1256 g = string_catn(g, p, ss - p);
1257
1258 #ifdef USE_READLINE
1259 if (fn_readline) free(readline_line);
1260 #endif
1261
1262 /* g can only be NULL if ss==p */
1263 if (ss == p || g->s[g->ptr-1] != '\\')
1264 break;
1265
1266 --g->ptr;
1267 (void) string_from_gstring(g);
1268 }
1269
1270 if (!g) printf("\n");
1271 return string_from_gstring(g);
1272 }
1273
1274
1275
1276 /*************************************************
1277 * Output usage information for the program *
1278 *************************************************/
1279
1280 /* This function is called when there are no recipients
1281 or a specific --help argument was added.
1282
1283 Arguments:
1284 progname information on what name we were called by
1285
1286 Returns: DOES NOT RETURN
1287 */
1288
1289 static void
1290 exim_usage(uschar *progname)
1291 {
1292
1293 /* Handle specific program invocation variants */
1294 if (Ustrcmp(progname, US"-mailq") == 0)
1295 exim_fail(
1296 "mailq - list the contents of the mail queue\n\n"
1297 "For a list of options, see the Exim documentation.\n");
1298
1299 /* Generic usage - we output this whatever happens */
1300 exim_fail(
1301 "Exim is a Mail Transfer Agent. It is normally called by Mail User Agents,\n"
1302 "not directly from a shell command line. Options and/or arguments control\n"
1303 "what it does when called. For a list of options, see the Exim documentation.\n");
1304 }
1305
1306
1307
1308 /*************************************************
1309 * Validate that the macros given are okay *
1310 *************************************************/
1311
1312 /* Typically, Exim will drop privileges if macros are supplied. In some
1313 cases, we want to not do so.
1314
1315 Arguments: opt_D_used - true if the commandline had a "-D" option
1316 Returns: true if trusted, false otherwise
1317 */
1318
1319 static BOOL
1320 macros_trusted(BOOL opt_D_used)
1321 {
1322 #ifdef WHITELIST_D_MACROS
1323 macro_item *m;
1324 uschar *whitelisted, *end, *p, **whites, **w;
1325 int white_count, i, n;
1326 size_t len;
1327 BOOL prev_char_item, found;
1328 #endif
1329
1330 if (!opt_D_used)
1331 return TRUE;
1332 #ifndef WHITELIST_D_MACROS
1333 return FALSE;
1334 #else
1335
1336 /* We only trust -D overrides for some invoking users:
1337 root, the exim run-time user, the optional config owner user.
1338 I don't know why config-owner would be needed, but since they can own the
1339 config files anyway, there's no security risk to letting them override -D. */
1340 if ( ! ((real_uid == root_uid)
1341 || (real_uid == exim_uid)
1342 #ifdef CONFIGURE_OWNER
1343 || (real_uid == config_uid)
1344 #endif
1345 ))
1346 {
1347 debug_printf("macros_trusted rejecting macros for uid %d\n", (int) real_uid);
1348 return FALSE;
1349 }
1350
1351 /* Get a list of macros which are whitelisted */
1352 whitelisted = string_copy_malloc(US WHITELIST_D_MACROS);
1353 prev_char_item = FALSE;
1354 white_count = 0;
1355 for (p = whitelisted; *p != '\0'; ++p)
1356 {
1357 if (*p == ':' || isspace(*p))
1358 {
1359 *p = '\0';
1360 if (prev_char_item)
1361 ++white_count;
1362 prev_char_item = FALSE;
1363 continue;
1364 }
1365 if (!prev_char_item)
1366 prev_char_item = TRUE;
1367 }
1368 end = p;
1369 if (prev_char_item)
1370 ++white_count;
1371 if (!white_count)
1372 return FALSE;
1373 whites = store_malloc(sizeof(uschar *) * (white_count+1));
1374 for (p = whitelisted, i = 0; (p != end) && (i < white_count); ++p)
1375 {
1376 if (*p != '\0')
1377 {
1378 whites[i++] = p;
1379 if (i == white_count)
1380 break;
1381 while (*p != '\0' && p < end)
1382 ++p;
1383 }
1384 }
1385 whites[i] = NULL;
1386
1387 /* The list of commandline macros should be very short.
1388 Accept the N*M complexity. */
1389 for (m = macros_user; m; m = m->next) if (m->command_line)
1390 {
1391 found = FALSE;
1392 for (w = whites; *w; ++w)
1393 if (Ustrcmp(*w, m->name) == 0)
1394 {
1395 found = TRUE;
1396 break;
1397 }
1398 if (!found)
1399 return FALSE;
1400 if (!m->replacement)
1401 continue;
1402 if ((len = m->replen) == 0)
1403 continue;
1404 n = pcre_exec(regex_whitelisted_macro, NULL, CS m->replacement, len,
1405 0, PCRE_EOPT, NULL, 0);
1406 if (n < 0)
1407 {
1408 if (n != PCRE_ERROR_NOMATCH)
1409 debug_printf("macros_trusted checking %s returned %d\n", m->name, n);
1410 return FALSE;
1411 }
1412 }
1413 DEBUG(D_any) debug_printf("macros_trusted overridden to true by whitelisting\n");
1414 return TRUE;
1415 #endif
1416 }
1417
1418
1419 /*************************************************
1420 * Expansion testing *
1421 *************************************************/
1422
1423 /* Expand and print one item, doing macro-processing.
1424
1425 Arguments:
1426 item line for expansion
1427 */
1428
1429 static void
1430 expansion_test_line(uschar * line)
1431 {
1432 int len;
1433 BOOL dummy_macexp;
1434
1435 Ustrncpy(big_buffer, line, big_buffer_size);
1436 big_buffer[big_buffer_size-1] = '\0';
1437 len = Ustrlen(big_buffer);
1438
1439 (void) macros_expand(0, &len, &dummy_macexp);
1440
1441 if (isupper(big_buffer[0]))
1442 {
1443 if (macro_read_assignment(big_buffer))
1444 printf("Defined macro '%s'\n", mlast->name);
1445 }
1446 else
1447 if ((line = expand_string(big_buffer))) printf("%s\n", CS line);
1448 else printf("Failed: %s\n", expand_string_message);
1449 }
1450
1451
1452
1453 /*************************************************
1454 * Entry point and high-level code *
1455 *************************************************/
1456
1457 /* Entry point for the Exim mailer. Analyse the arguments and arrange to take
1458 the appropriate action. All the necessary functions are present in the one
1459 binary. I originally thought one should split it up, but it turns out that so
1460 much of the apparatus is needed in each chunk that one might as well just have
1461 it all available all the time, which then makes the coding easier as well.
1462
1463 Arguments:
1464 argc count of entries in argv
1465 argv argument strings, with argv[0] being the program name
1466
1467 Returns: EXIT_SUCCESS if terminated successfully
1468 EXIT_FAILURE otherwise, except when a message has been sent
1469 to the sender, and -oee was given
1470 */
1471
1472 int
1473 main(int argc, char **cargv)
1474 {
1475 uschar **argv = USS cargv;
1476 int arg_receive_timeout = -1;
1477 int arg_smtp_receive_timeout = -1;
1478 int arg_error_handling = error_handling;
1479 int filter_sfd = -1;
1480 int filter_ufd = -1;
1481 int group_count;
1482 int i, rv;
1483 int list_queue_option = 0;
1484 int msg_action = 0;
1485 int msg_action_arg = -1;
1486 int namelen = (argv[0] == NULL)? 0 : Ustrlen(argv[0]);
1487 int queue_only_reason = 0;
1488 #ifdef EXIM_PERL
1489 int perl_start_option = 0;
1490 #endif
1491 int recipients_arg = argc;
1492 int sender_address_domain = 0;
1493 int test_retry_arg = -1;
1494 int test_rewrite_arg = -1;
1495 gid_t original_egid;
1496 BOOL arg_queue_only = FALSE;
1497 BOOL bi_option = FALSE;
1498 BOOL checking = FALSE;
1499 BOOL count_queue = FALSE;
1500 BOOL expansion_test = FALSE;
1501 BOOL extract_recipients = FALSE;
1502 BOOL flag_G = FALSE;
1503 BOOL flag_n = FALSE;
1504 BOOL forced_delivery = FALSE;
1505 BOOL f_end_dot = FALSE;
1506 BOOL deliver_give_up = FALSE;
1507 BOOL list_queue = FALSE;
1508 BOOL list_options = FALSE;
1509 BOOL list_config = FALSE;
1510 BOOL local_queue_only;
1511 BOOL more = TRUE;
1512 BOOL one_msg_action = FALSE;
1513 BOOL opt_D_used = FALSE;
1514 BOOL queue_only_set = FALSE;
1515 BOOL receiving_message = TRUE;
1516 BOOL sender_ident_set = FALSE;
1517 BOOL session_local_queue_only;
1518 BOOL unprivileged;
1519 BOOL removed_privilege = FALSE;
1520 BOOL usage_wanted = FALSE;
1521 BOOL verify_address_mode = FALSE;
1522 BOOL verify_as_sender = FALSE;
1523 BOOL version_printed = FALSE;
1524 uschar *alias_arg = NULL;
1525 uschar *called_as = US"";
1526 uschar *cmdline_syslog_name = NULL;
1527 uschar *start_queue_run_id = NULL;
1528 uschar *stop_queue_run_id = NULL;
1529 uschar *expansion_test_message = NULL;
1530 uschar *ftest_domain = NULL;
1531 uschar *ftest_localpart = NULL;
1532 uschar *ftest_prefix = NULL;
1533 uschar *ftest_suffix = NULL;
1534 uschar *log_oneline = NULL;
1535 uschar *malware_test_file = NULL;
1536 uschar *real_sender_address;
1537 uschar *originator_home = US"/";
1538 size_t sz;
1539 void *reset_point;
1540
1541 struct passwd *pw;
1542 struct stat statbuf;
1543 pid_t passed_qr_pid = (pid_t)0;
1544 int passed_qr_pipe = -1;
1545 gid_t group_list[EXIM_GROUPLIST_SIZE];
1546
1547 /* For the -bI: flag */
1548 enum commandline_info info_flag = CMDINFO_NONE;
1549 BOOL info_stdout = FALSE;
1550
1551 /* Possible options for -R and -S */
1552
1553 static uschar *rsopts[] = { US"f", US"ff", US"r", US"rf", US"rff" };
1554
1555 /* Need to define this in case we need to change the environment in order
1556 to get rid of a bogus time zone. We have to make it char rather than uschar
1557 because some OS define it in /usr/include/unistd.h. */
1558
1559 extern char **environ;
1560
1561 /* If the Exim user and/or group and/or the configuration file owner/group were
1562 defined by ref:name at build time, we must now find the actual uid/gid values.
1563 This is a feature to make the lives of binary distributors easier. */
1564
1565 #ifdef EXIM_USERNAME
1566 if (route_finduser(US EXIM_USERNAME, &pw, &exim_uid))
1567 {
1568 if (exim_uid == 0)
1569 exim_fail("exim: refusing to run with uid 0 for \"%s\"\n", EXIM_USERNAME);
1570
1571 /* If ref:name uses a number as the name, route_finduser() returns
1572 TRUE with exim_uid set and pw coerced to NULL. */
1573 if (pw)
1574 exim_gid = pw->pw_gid;
1575 #ifndef EXIM_GROUPNAME
1576 else
1577 exim_fail(
1578 "exim: ref:name should specify a usercode, not a group.\n"
1579 "exim: can't let you get away with it unless you also specify a group.\n");
1580 #endif
1581 }
1582 else
1583 exim_fail("exim: failed to find uid for user name \"%s\"\n", EXIM_USERNAME);
1584 #endif
1585
1586 #ifdef EXIM_GROUPNAME
1587 if (!route_findgroup(US EXIM_GROUPNAME, &exim_gid))
1588 exim_fail("exim: failed to find gid for group name \"%s\"\n", EXIM_GROUPNAME);
1589 #endif
1590
1591 #ifdef CONFIGURE_OWNERNAME
1592 if (!route_finduser(US CONFIGURE_OWNERNAME, NULL, &config_uid))
1593 exim_fail("exim: failed to find uid for user name \"%s\"\n",
1594 CONFIGURE_OWNERNAME);
1595 #endif
1596
1597 /* We default the system_filter_user to be the Exim run-time user, as a
1598 sane non-root value. */
1599 system_filter_uid = exim_uid;
1600
1601 #ifdef CONFIGURE_GROUPNAME
1602 if (!route_findgroup(US CONFIGURE_GROUPNAME, &config_gid))
1603 exim_fail("exim: failed to find gid for group name \"%s\"\n",
1604 CONFIGURE_GROUPNAME);
1605 #endif
1606
1607 /* In the Cygwin environment, some initialization used to need doing.
1608 It was fudged in by means of this macro; now no longer but we'll leave
1609 it in case of others. */
1610
1611 #ifdef OS_INIT
1612 OS_INIT
1613 #endif
1614
1615 /* Check a field which is patched when we are running Exim within its
1616 testing harness; do a fast initial check, and then the whole thing. */
1617
1618 f.running_in_test_harness =
1619 *running_status == '<' && Ustrcmp(running_status, "<<<testing>>>") == 0;
1620 if (f.running_in_test_harness)
1621 debug_store = TRUE;
1622
1623 /* The C standard says that the equivalent of setlocale(LC_ALL, "C") is obeyed
1624 at the start of a program; however, it seems that some environments do not
1625 follow this. A "strange" locale can affect the formatting of timestamps, so we
1626 make quite sure. */
1627
1628 setlocale(LC_ALL, "C");
1629
1630 /* Set up the default handler for timing using alarm(). */
1631
1632 os_non_restarting_signal(SIGALRM, sigalrm_handler);
1633
1634 /* Ensure we have a buffer for constructing log entries. Use malloc directly,
1635 because store_malloc writes a log entry on failure. */
1636
1637 if (!(log_buffer = US malloc(LOG_BUFFER_SIZE)))
1638 exim_fail("exim: failed to get store for log buffer\n");
1639
1640 /* Initialize the default log options. */
1641
1642 bits_set(log_selector, log_selector_size, log_default);
1643
1644 /* Set log_stderr to stderr, provided that stderr exists. This gets reset to
1645 NULL when the daemon is run and the file is closed. We have to use this
1646 indirection, because some systems don't allow writing to the variable "stderr".
1647 */
1648
1649 if (fstat(fileno(stderr), &statbuf) >= 0) log_stderr = stderr;
1650
1651 /* Arrange for the PCRE regex library to use our store functions. Note that
1652 the normal calls are actually macros that add additional arguments for
1653 debugging purposes so we have to assign specially constructed functions here.
1654 The default is to use store in the stacking pool, but this is overridden in the
1655 regex_must_compile() function. */
1656
1657 pcre_malloc = function_store_get;
1658 pcre_free = function_dummy_free;
1659
1660 /* Ensure there is a big buffer for temporary use in several places. It is put
1661 in malloc store so that it can be freed for enlargement if necessary. */
1662
1663 big_buffer = store_malloc(big_buffer_size);
1664
1665 /* Set up the handler for the data request signal, and set the initial
1666 descriptive text. */
1667
1668 set_process_info("initializing");
1669 os_restarting_signal(SIGUSR1, usr1_handler);
1670
1671 /* If running in a dockerized environment, the TERM signal is only
1672 delegated to the PID 1 if we request it by setting an signal handler */
1673 if (getpid() == 1) signal(SIGTERM, term_handler);
1674
1675 /* SIGHUP is used to get the daemon to reconfigure. It gets set as appropriate
1676 in the daemon code. For the rest of Exim's uses, we ignore it. */
1677
1678 signal(SIGHUP, SIG_IGN);
1679
1680 /* We don't want to die on pipe errors as the code is written to handle
1681 the write error instead. */
1682
1683 signal(SIGPIPE, SIG_IGN);
1684
1685 /* Under some circumstance on some OS, Exim can get called with SIGCHLD
1686 set to SIG_IGN. This causes subprocesses that complete before the parent
1687 process waits for them not to hang around, so when Exim calls wait(), nothing
1688 is there. The wait() code has been made robust against this, but let's ensure
1689 that SIGCHLD is set to SIG_DFL, because it's tidier to wait and get a process
1690 ending status. We use sigaction rather than plain signal() on those OS where
1691 SA_NOCLDWAIT exists, because we want to be sure it is turned off. (There was a
1692 problem on AIX with this.) */
1693
1694 #ifdef SA_NOCLDWAIT
1695 {
1696 struct sigaction act;
1697 act.sa_handler = SIG_DFL;
1698 sigemptyset(&(act.sa_mask));
1699 act.sa_flags = 0;
1700 sigaction(SIGCHLD, &act, NULL);
1701 }
1702 #else
1703 signal(SIGCHLD, SIG_DFL);
1704 #endif
1705
1706 /* Save the arguments for use if we re-exec exim as a daemon after receiving
1707 SIGHUP. */
1708
1709 sighup_argv = argv;
1710
1711 /* Set up the version number. Set up the leading 'E' for the external form of
1712 message ids, set the pointer to the internal form, and initialize it to
1713 indicate no message being processed. */
1714
1715 version_init();
1716 message_id_option[0] = '-';
1717 message_id_external = message_id_option + 1;
1718 message_id_external[0] = 'E';
1719 message_id = message_id_external + 1;
1720 message_id[0] = 0;
1721
1722 /* Set the umask to zero so that any files Exim creates using open() are
1723 created with the modes that it specifies. NOTE: Files created with fopen() have
1724 a problem, which was not recognized till rather late (February 2006). With this
1725 umask, such files will be world writeable. (They are all content scanning files
1726 in the spool directory, which isn't world-accessible, so this is not a
1727 disaster, but it's untidy.) I don't want to change this overall setting,
1728 however, because it will interact badly with the open() calls. Instead, there's
1729 now a function called modefopen() that fiddles with the umask while calling
1730 fopen(). */
1731
1732 (void)umask(0);
1733
1734 /* Precompile the regular expression for matching a message id. Keep this in
1735 step with the code that generates ids in the accept.c module. We need to do
1736 this here, because the -M options check their arguments for syntactic validity
1737 using mac_ismsgid, which uses this. */
1738
1739 regex_ismsgid =
1740 regex_must_compile(US"^(?:[^\\W_]{6}-){2}[^\\W_]{2}$", FALSE, TRUE);
1741
1742 /* Precompile the regular expression that is used for matching an SMTP error
1743 code, possibly extended, at the start of an error message. Note that the
1744 terminating whitespace character is included. */
1745
1746 regex_smtp_code =
1747 regex_must_compile(US"^\\d\\d\\d\\s(?:\\d\\.\\d\\d?\\d?\\.\\d\\d?\\d?\\s)?",
1748 FALSE, TRUE);
1749
1750 #ifdef WHITELIST_D_MACROS
1751 /* Precompile the regular expression used to filter the content of macros
1752 given to -D for permissibility. */
1753
1754 regex_whitelisted_macro =
1755 regex_must_compile(US"^[A-Za-z0-9_/.-]*$", FALSE, TRUE);
1756 #endif
1757
1758 for (i = 0; i < REGEX_VARS; i++) regex_vars[i] = NULL;
1759
1760 /* If the program is called as "mailq" treat it as equivalent to "exim -bp";
1761 this seems to be a generally accepted convention, since one finds symbolic
1762 links called "mailq" in standard OS configurations. */
1763
1764 if ((namelen == 5 && Ustrcmp(argv[0], "mailq") == 0) ||
1765 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/mailq", 6) == 0))
1766 {
1767 list_queue = TRUE;
1768 receiving_message = FALSE;
1769 called_as = US"-mailq";
1770 }
1771
1772 /* If the program is called as "rmail" treat it as equivalent to
1773 "exim -i -oee", thus allowing UUCP messages to be input using non-SMTP mode,
1774 i.e. preventing a single dot on a line from terminating the message, and
1775 returning with zero return code, even in cases of error (provided an error
1776 message has been sent). */
1777
1778 if ((namelen == 5 && Ustrcmp(argv[0], "rmail") == 0) ||
1779 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/rmail", 6) == 0))
1780 {
1781 f.dot_ends = FALSE;
1782 called_as = US"-rmail";
1783 errors_sender_rc = EXIT_SUCCESS;
1784 }
1785
1786 /* If the program is called as "rsmtp" treat it as equivalent to "exim -bS";
1787 this is a smail convention. */
1788
1789 if ((namelen == 5 && Ustrcmp(argv[0], "rsmtp") == 0) ||
1790 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/rsmtp", 6) == 0))
1791 {
1792 smtp_input = smtp_batched_input = TRUE;
1793 called_as = US"-rsmtp";
1794 }
1795
1796 /* If the program is called as "runq" treat it as equivalent to "exim -q";
1797 this is a smail convention. */
1798
1799 if ((namelen == 4 && Ustrcmp(argv[0], "runq") == 0) ||
1800 (namelen > 4 && Ustrncmp(argv[0] + namelen - 5, "/runq", 5) == 0))
1801 {
1802 queue_interval = 0;
1803 receiving_message = FALSE;
1804 called_as = US"-runq";
1805 }
1806
1807 /* If the program is called as "newaliases" treat it as equivalent to
1808 "exim -bi"; this is a sendmail convention. */
1809
1810 if ((namelen == 10 && Ustrcmp(argv[0], "newaliases") == 0) ||
1811 (namelen > 10 && Ustrncmp(argv[0] + namelen - 11, "/newaliases", 11) == 0))
1812 {
1813 bi_option = TRUE;
1814 receiving_message = FALSE;
1815 called_as = US"-newaliases";
1816 }
1817
1818 /* Save the original effective uid for a couple of uses later. It should
1819 normally be root, but in some esoteric environments it may not be. */
1820
1821 original_euid = geteuid();
1822 original_egid = getegid();
1823
1824 /* Get the real uid and gid. If the caller is root, force the effective uid/gid
1825 to be the same as the real ones. This makes a difference only if Exim is setuid
1826 (or setgid) to something other than root, which could be the case in some
1827 special configurations. */
1828
1829 real_uid = getuid();
1830 real_gid = getgid();
1831
1832 if (real_uid == root_uid)
1833 {
1834 if ((rv = setgid(real_gid)))
1835 exim_fail("exim: setgid(%ld) failed: %s\n",
1836 (long int)real_gid, strerror(errno));
1837 if ((rv = setuid(real_uid)))
1838 exim_fail("exim: setuid(%ld) failed: %s\n",
1839 (long int)real_uid, strerror(errno));
1840 }
1841
1842 /* If neither the original real uid nor the original euid was root, Exim is
1843 running in an unprivileged state. */
1844
1845 unprivileged = (real_uid != root_uid && original_euid != root_uid);
1846
1847 /* Scan the program's arguments. Some can be dealt with right away; others are
1848 simply recorded for checking and handling afterwards. Do a high-level switch
1849 on the second character (the one after '-'), to save some effort. */
1850
1851 for (i = 1; i < argc; i++)
1852 {
1853 BOOL badarg = FALSE;
1854 uschar *arg = argv[i];
1855 uschar *argrest;
1856 int switchchar;
1857
1858 /* An argument not starting with '-' is the start of a recipients list;
1859 break out of the options-scanning loop. */
1860
1861 if (arg[0] != '-')
1862 {
1863 recipients_arg = i;
1864 break;
1865 }
1866
1867 /* An option consisting of -- terminates the options */
1868
1869 if (Ustrcmp(arg, "--") == 0)
1870 {
1871 recipients_arg = i + 1;
1872 break;
1873 }
1874
1875 /* Handle flagged options */
1876
1877 switchchar = arg[1];
1878 argrest = arg+2;
1879
1880 /* Make all -ex options synonymous with -oex arguments, since that
1881 is assumed by various callers. Also make -qR options synonymous with -R
1882 options, as that seems to be required as well. Allow for -qqR too, and
1883 the same for -S options. */
1884
1885 if (Ustrncmp(arg+1, "oe", 2) == 0 ||
1886 Ustrncmp(arg+1, "qR", 2) == 0 ||
1887 Ustrncmp(arg+1, "qS", 2) == 0)
1888 {
1889 switchchar = arg[2];
1890 argrest++;
1891 }
1892 else if (Ustrncmp(arg+1, "qqR", 3) == 0 || Ustrncmp(arg+1, "qqS", 3) == 0)
1893 {
1894 switchchar = arg[3];
1895 argrest += 2;
1896 f.queue_2stage = TRUE;
1897 }
1898
1899 /* Make -r synonymous with -f, since it is a documented alias */
1900
1901 else if (arg[1] == 'r') switchchar = 'f';
1902
1903 /* Make -ov synonymous with -v */
1904
1905 else if (Ustrcmp(arg, "-ov") == 0)
1906 {
1907 switchchar = 'v';
1908 argrest++;
1909 }
1910
1911 /* deal with --option_aliases */
1912 else if (switchchar == '-')
1913 {
1914 if (Ustrcmp(argrest, "help") == 0)
1915 {
1916 usage_wanted = TRUE;
1917 break;
1918 }
1919 else if (Ustrcmp(argrest, "version") == 0)
1920 {
1921 switchchar = 'b';
1922 argrest = US"V";
1923 }
1924 }
1925
1926 /* High-level switch on active initial letter */
1927
1928 switch(switchchar)
1929 {
1930
1931 /* sendmail uses -Ac and -Am to control which .cf file is used;
1932 we ignore them. */
1933 case 'A':
1934 if (*argrest == '\0') { badarg = TRUE; break; }
1935 else
1936 {
1937 BOOL ignore = FALSE;
1938 switch (*argrest)
1939 {
1940 case 'c':
1941 case 'm':
1942 if (*(argrest + 1) == '\0')
1943 ignore = TRUE;
1944 break;
1945 }
1946 if (!ignore) { badarg = TRUE; break; }
1947 }
1948 break;
1949
1950 /* -Btype is a sendmail option for 7bit/8bit setting. Exim is 8-bit clean
1951 so has no need of it. */
1952
1953 case 'B':
1954 if (*argrest == 0) i++; /* Skip over the type */
1955 break;
1956
1957
1958 case 'b':
1959 receiving_message = FALSE; /* Reset TRUE for -bm, -bS, -bs below */
1960
1961 /* -bd: Run in daemon mode, awaiting SMTP connections.
1962 -bdf: Ditto, but in the foreground.
1963 */
1964
1965 if (*argrest == 'd')
1966 {
1967 f.daemon_listen = TRUE;
1968 if (*(++argrest) == 'f') f.background_daemon = FALSE;
1969 else if (*argrest != 0) { badarg = TRUE; break; }
1970 }
1971
1972 /* -be: Run in expansion test mode
1973 -bem: Ditto, but read a message from a file first
1974 */
1975
1976 else if (*argrest == 'e')
1977 {
1978 expansion_test = checking = TRUE;
1979 if (argrest[1] == 'm')
1980 {
1981 if (++i >= argc) { badarg = TRUE; break; }
1982 expansion_test_message = argv[i];
1983 argrest++;
1984 }
1985 if (argrest[1] != 0) { badarg = TRUE; break; }
1986 }
1987
1988 /* -bF: Run system filter test */
1989
1990 else if (*argrest == 'F')
1991 {
1992 filter_test |= checking = FTEST_SYSTEM;
1993 if (*(++argrest) != 0) { badarg = TRUE; break; }
1994 if (++i < argc) filter_test_sfile = argv[i]; else
1995 exim_fail("exim: file name expected after %s\n", argv[i-1]);
1996 }
1997
1998 /* -bf: Run user filter test
1999 -bfd: Set domain for filter testing
2000 -bfl: Set local part for filter testing
2001 -bfp: Set prefix for filter testing
2002 -bfs: Set suffix for filter testing
2003 */
2004
2005 else if (*argrest == 'f')
2006 {
2007 if (*(++argrest) == 0)
2008 {
2009 filter_test |= checking = FTEST_USER;
2010 if (++i < argc) filter_test_ufile = argv[i]; else
2011 exim_fail("exim: file name expected after %s\n", argv[i-1]);
2012 }
2013 else
2014 {
2015 if (++i >= argc)
2016 exim_fail("exim: string expected after %s\n", arg);
2017 if (Ustrcmp(argrest, "d") == 0) ftest_domain = argv[i];
2018 else if (Ustrcmp(argrest, "l") == 0) ftest_localpart = argv[i];
2019 else if (Ustrcmp(argrest, "p") == 0) ftest_prefix = argv[i];
2020 else if (Ustrcmp(argrest, "s") == 0) ftest_suffix = argv[i];
2021 else { badarg = TRUE; break; }
2022 }
2023 }
2024
2025 /* -bh: Host checking - an IP address must follow. */
2026
2027 else if (Ustrcmp(argrest, "h") == 0 || Ustrcmp(argrest, "hc") == 0)
2028 {
2029 if (++i >= argc) { badarg = TRUE; break; }
2030 sender_host_address = argv[i];
2031 host_checking = checking = f.log_testing_mode = TRUE;
2032 f.host_checking_callout = argrest[1] == 'c';
2033 message_logs = FALSE;
2034 }
2035
2036 /* -bi: This option is used by sendmail to initialize *the* alias file,
2037 though it has the -oA option to specify a different file. Exim has no
2038 concept of *the* alias file, but since Sun's YP make script calls
2039 sendmail this way, some support must be provided. */
2040
2041 else if (Ustrcmp(argrest, "i") == 0) bi_option = TRUE;
2042
2043 /* -bI: provide information, of the type to follow after a colon.
2044 This is an Exim flag. */
2045
2046 else if (argrest[0] == 'I' && Ustrlen(argrest) >= 2 && argrest[1] == ':')
2047 {
2048 uschar *p = &argrest[2];
2049 info_flag = CMDINFO_HELP;
2050 if (Ustrlen(p))
2051 {
2052 if (strcmpic(p, CUS"sieve") == 0)
2053 {
2054 info_flag = CMDINFO_SIEVE;
2055 info_stdout = TRUE;
2056 }
2057 else if (strcmpic(p, CUS"dscp") == 0)
2058 {
2059 info_flag = CMDINFO_DSCP;
2060 info_stdout = TRUE;
2061 }
2062 else if (strcmpic(p, CUS"help") == 0)
2063 {
2064 info_stdout = TRUE;
2065 }
2066 }
2067 }
2068
2069 /* -bm: Accept and deliver message - the default option. Reinstate
2070 receiving_message, which got turned off for all -b options. */
2071
2072 else if (Ustrcmp(argrest, "m") == 0) receiving_message = TRUE;
2073
2074 /* -bmalware: test the filename given for malware */
2075
2076 else if (Ustrcmp(argrest, "malware") == 0)
2077 {
2078 if (++i >= argc) { badarg = TRUE; break; }
2079 checking = TRUE;
2080 malware_test_file = argv[i];
2081 }
2082
2083 /* -bnq: For locally originating messages, do not qualify unqualified
2084 addresses. In the envelope, this causes errors; in header lines they
2085 just get left. */
2086
2087 else if (Ustrcmp(argrest, "nq") == 0)
2088 {
2089 f.allow_unqualified_sender = FALSE;
2090 f.allow_unqualified_recipient = FALSE;
2091 }
2092
2093 /* -bpxx: List the contents of the mail queue, in various forms. If
2094 the option is -bpc, just a queue count is needed. Otherwise, if the
2095 first letter after p is r, then order is random. */
2096
2097 else if (*argrest == 'p')
2098 {
2099 if (*(++argrest) == 'c')
2100 {
2101 count_queue = TRUE;
2102 if (*(++argrest) != 0) badarg = TRUE;
2103 break;
2104 }
2105
2106 if (*argrest == 'r')
2107 {
2108 list_queue_option = 8;
2109 argrest++;
2110 }
2111 else list_queue_option = 0;
2112
2113 list_queue = TRUE;
2114
2115 /* -bp: List the contents of the mail queue, top-level only */
2116
2117 if (*argrest == 0) {}
2118
2119 /* -bpu: List the contents of the mail queue, top-level undelivered */
2120
2121 else if (Ustrcmp(argrest, "u") == 0) list_queue_option += 1;
2122
2123 /* -bpa: List the contents of the mail queue, including all delivered */
2124
2125 else if (Ustrcmp(argrest, "a") == 0) list_queue_option += 2;
2126
2127 /* Unknown after -bp[r] */
2128
2129 else
2130 {
2131 badarg = TRUE;
2132 break;
2133 }
2134 }
2135
2136
2137 /* -bP: List the configuration variables given as the address list.
2138 Force -v, so configuration errors get displayed. */
2139
2140 else if (Ustrcmp(argrest, "P") == 0)
2141 {
2142 /* -bP config: we need to setup here, because later,
2143 * when list_options is checked, the config is read already */
2144 if (argv[i+1] && Ustrcmp(argv[i+1], "config") == 0)
2145 {
2146 list_config = TRUE;
2147 readconf_save_config(version_string);
2148 }
2149 else
2150 {
2151 list_options = TRUE;
2152 debug_selector |= D_v;
2153 debug_file = stderr;
2154 }
2155 }
2156
2157 /* -brt: Test retry configuration lookup */
2158
2159 else if (Ustrcmp(argrest, "rt") == 0)
2160 {
2161 checking = TRUE;
2162 test_retry_arg = i + 1;
2163 goto END_ARG;
2164 }
2165
2166 /* -brw: Test rewrite configuration */
2167
2168 else if (Ustrcmp(argrest, "rw") == 0)
2169 {
2170 checking = TRUE;
2171 test_rewrite_arg = i + 1;
2172 goto END_ARG;
2173 }
2174
2175 /* -bS: Read SMTP commands on standard input, but produce no replies -
2176 all errors are reported by sending messages. */
2177
2178 else if (Ustrcmp(argrest, "S") == 0)
2179 smtp_input = smtp_batched_input = receiving_message = TRUE;
2180
2181 /* -bs: Read SMTP commands on standard input and produce SMTP replies
2182 on standard output. */
2183
2184 else if (Ustrcmp(argrest, "s") == 0) smtp_input = receiving_message = TRUE;
2185
2186 /* -bt: address testing mode */
2187
2188 else if (Ustrcmp(argrest, "t") == 0)
2189 f.address_test_mode = checking = f.log_testing_mode = TRUE;
2190
2191 /* -bv: verify addresses */
2192
2193 else if (Ustrcmp(argrest, "v") == 0)
2194 verify_address_mode = checking = f.log_testing_mode = TRUE;
2195
2196 /* -bvs: verify sender addresses */
2197
2198 else if (Ustrcmp(argrest, "vs") == 0)
2199 {
2200 verify_address_mode = checking = f.log_testing_mode = TRUE;
2201 verify_as_sender = TRUE;
2202 }
2203
2204 /* -bV: Print version string and support details */
2205
2206 else if (Ustrcmp(argrest, "V") == 0)
2207 {
2208 printf("Exim version %s #%s built %s\n", version_string,
2209 version_cnumber, version_date);
2210 printf("%s\n", CS version_copyright);
2211 version_printed = TRUE;
2212 show_whats_supported(stdout);
2213 f.log_testing_mode = TRUE;
2214 }
2215
2216 /* -bw: inetd wait mode, accept a listening socket as stdin */
2217
2218 else if (*argrest == 'w')
2219 {
2220 f.inetd_wait_mode = TRUE;
2221 f.background_daemon = FALSE;
2222 f.daemon_listen = TRUE;
2223 if (*(++argrest) != '\0')
2224 if ((inetd_wait_timeout = readconf_readtime(argrest, 0, FALSE)) <= 0)
2225 exim_fail("exim: bad time value %s: abandoned\n", argv[i]);
2226 }
2227
2228 else badarg = TRUE;
2229 break;
2230
2231
2232 /* -C: change configuration file list; ignore if it isn't really
2233 a change! Enforce a prefix check if required. */
2234
2235 case 'C':
2236 if (*argrest == 0)
2237 {
2238 if(++i < argc) argrest = argv[i]; else
2239 { badarg = TRUE; break; }
2240 }
2241 if (Ustrcmp(config_main_filelist, argrest) != 0)
2242 {
2243 #ifdef ALT_CONFIG_PREFIX
2244 int sep = 0;
2245 int len = Ustrlen(ALT_CONFIG_PREFIX);
2246 const uschar *list = argrest;
2247 uschar *filename;
2248 while((filename = string_nextinlist(&list, &sep, big_buffer,
2249 big_buffer_size)) != NULL)
2250 {
2251 if ((Ustrlen(filename) < len ||
2252 Ustrncmp(filename, ALT_CONFIG_PREFIX, len) != 0 ||
2253 Ustrstr(filename, "/../") != NULL) &&
2254 (Ustrcmp(filename, "/dev/null") != 0 || real_uid != root_uid))
2255 exim_fail("-C Permission denied\n");
2256 }
2257 #endif
2258 if (real_uid != root_uid)
2259 {
2260 #ifdef TRUSTED_CONFIG_LIST
2261
2262 if (real_uid != exim_uid
2263 #ifdef CONFIGURE_OWNER
2264 && real_uid != config_uid
2265 #endif
2266 )
2267 f.trusted_config = FALSE;
2268 else
2269 {
2270 FILE *trust_list = Ufopen(TRUSTED_CONFIG_LIST, "rb");
2271 if (trust_list)
2272 {
2273 struct stat statbuf;
2274
2275 if (fstat(fileno(trust_list), &statbuf) != 0 ||
2276 (statbuf.st_uid != root_uid /* owner not root */
2277 #ifdef CONFIGURE_OWNER
2278 && statbuf.st_uid != config_uid /* owner not the special one */
2279 #endif
2280 ) || /* or */
2281 (statbuf.st_gid != root_gid /* group not root */
2282 #ifdef CONFIGURE_GROUP
2283 && statbuf.st_gid != config_gid /* group not the special one */
2284 #endif
2285 && (statbuf.st_mode & 020) != 0 /* group writeable */
2286 ) || /* or */
2287 (statbuf.st_mode & 2) != 0) /* world writeable */
2288 {
2289 f.trusted_config = FALSE;
2290 fclose(trust_list);
2291 }
2292 else
2293 {
2294 /* Well, the trust list at least is up to scratch... */
2295 void *reset_point = store_get(0);
2296 uschar *trusted_configs[32];
2297 int nr_configs = 0;
2298 int i = 0;
2299
2300 while (Ufgets(big_buffer, big_buffer_size, trust_list))
2301 {
2302 uschar *start = big_buffer, *nl;
2303 while (*start && isspace(*start))
2304 start++;
2305 if (*start != '/')
2306 continue;
2307 nl = Ustrchr(start, '\n');
2308 if (nl)
2309 *nl = 0;
2310 trusted_configs[nr_configs++] = string_copy(start);
2311 if (nr_configs == 32)
2312 break;
2313 }
2314 fclose(trust_list);
2315
2316 if (nr_configs)
2317 {
2318 int sep = 0;
2319 const uschar *list = argrest;
2320 uschar *filename;
2321 while (f.trusted_config && (filename = string_nextinlist(&list,
2322 &sep, big_buffer, big_buffer_size)) != NULL)
2323 {
2324 for (i=0; i < nr_configs; i++)
2325 {
2326 if (Ustrcmp(filename, trusted_configs[i]) == 0)
2327 break;
2328 }
2329 if (i == nr_configs)
2330 {
2331 f.trusted_config = FALSE;
2332 break;
2333 }
2334 }
2335 store_reset(reset_point);
2336 }
2337 else
2338 {
2339 /* No valid prefixes found in trust_list file. */
2340 f.trusted_config = FALSE;
2341 }
2342 }
2343 }
2344 else
2345 {
2346 /* Could not open trust_list file. */
2347 f.trusted_config = FALSE;
2348 }
2349 }
2350 #else
2351 /* Not root; don't trust config */
2352 f.trusted_config = FALSE;
2353 #endif
2354 }
2355
2356 config_main_filelist = argrest;
2357 f.config_changed = TRUE;
2358 }
2359 break;
2360
2361
2362 /* -D: set up a macro definition */
2363
2364 case 'D':
2365 #ifdef DISABLE_D_OPTION
2366 exim_fail("exim: -D is not available in this Exim binary\n");
2367 #else
2368 {
2369 int ptr = 0;
2370 macro_item *m;
2371 uschar name[24];
2372 uschar *s = argrest;
2373
2374 opt_D_used = TRUE;
2375 while (isspace(*s)) s++;
2376
2377 if (*s < 'A' || *s > 'Z')
2378 exim_fail("exim: macro name set by -D must start with "
2379 "an upper case letter\n");
2380
2381 while (isalnum(*s) || *s == '_')
2382 {
2383 if (ptr < sizeof(name)-1) name[ptr++] = *s;
2384 s++;
2385 }
2386 name[ptr] = 0;
2387 if (ptr == 0) { badarg = TRUE; break; }
2388 while (isspace(*s)) s++;
2389 if (*s != 0)
2390 {
2391 if (*s++ != '=') { badarg = TRUE; break; }
2392 while (isspace(*s)) s++;
2393 }
2394
2395 for (m = macros_user; m; m = m->next)
2396 if (Ustrcmp(m->name, name) == 0)
2397 exim_fail("exim: duplicated -D in command line\n");
2398
2399 m = macro_create(name, s, TRUE);
2400
2401 if (clmacro_count >= MAX_CLMACROS)
2402 exim_fail("exim: too many -D options on command line\n");
2403 clmacros[clmacro_count++] = string_sprintf("-D%s=%s", m->name,
2404 m->replacement);
2405 }
2406 #endif
2407 break;
2408
2409 /* -d: Set debug level (see also -v below) or set the drop_cr option.
2410 The latter is now a no-op, retained for compatibility only. If -dd is used,
2411 debugging subprocesses of the daemon is disabled. */
2412
2413 case 'd':
2414 if (Ustrcmp(argrest, "ropcr") == 0)
2415 {
2416 /* drop_cr = TRUE; */
2417 }
2418
2419 /* Use an intermediate variable so that we don't set debugging while
2420 decoding the debugging bits. */
2421
2422 else
2423 {
2424 unsigned int selector = D_default;
2425 debug_selector = 0;
2426 debug_file = NULL;
2427 if (*argrest == 'd')
2428 {
2429 f.debug_daemon = TRUE;
2430 argrest++;
2431 }
2432 if (*argrest != 0)
2433 decode_bits(&selector, 1, debug_notall, argrest,
2434 debug_options, debug_options_count, US"debug", 0);
2435 debug_selector = selector;
2436 }
2437 break;
2438
2439
2440 /* -E: This is a local error message. This option is not intended for
2441 external use at all, but is not restricted to trusted callers because it
2442 does no harm (just suppresses certain error messages) and if Exim is run
2443 not setuid root it won't always be trusted when it generates error
2444 messages using this option. If there is a message id following -E, point
2445 message_reference at it, for logging. */
2446
2447 case 'E':
2448 f.local_error_message = TRUE;
2449 if (mac_ismsgid(argrest)) message_reference = argrest;
2450 break;
2451
2452
2453 /* -ex: The vacation program calls sendmail with the undocumented "-eq"
2454 option, so it looks as if historically the -oex options are also callable
2455 without the leading -o. So we have to accept them. Before the switch,
2456 anything starting -oe has been converted to -e. Exim does not support all
2457 of the sendmail error options. */
2458
2459 case 'e':
2460 if (Ustrcmp(argrest, "e") == 0)
2461 {
2462 arg_error_handling = ERRORS_SENDER;
2463 errors_sender_rc = EXIT_SUCCESS;
2464 }
2465 else if (Ustrcmp(argrest, "m") == 0) arg_error_handling = ERRORS_SENDER;
2466 else if (Ustrcmp(argrest, "p") == 0) arg_error_handling = ERRORS_STDERR;
2467 else if (Ustrcmp(argrest, "q") == 0) arg_error_handling = ERRORS_STDERR;
2468 else if (Ustrcmp(argrest, "w") == 0) arg_error_handling = ERRORS_SENDER;
2469 else badarg = TRUE;
2470 break;
2471
2472
2473 /* -F: Set sender's full name, used instead of the gecos entry from
2474 the password file. Since users can usually alter their gecos entries,
2475 there's no security involved in using this instead. The data can follow
2476 the -F or be in the next argument. */
2477
2478 case 'F':
2479 if (*argrest == 0)
2480 {
2481 if(++i < argc) argrest = argv[i]; else
2482 { badarg = TRUE; break; }
2483 }
2484 originator_name = argrest;
2485 f.sender_name_forced = TRUE;
2486 break;
2487
2488
2489 /* -f: Set sender's address - this value is only actually used if Exim is
2490 run by a trusted user, or if untrusted_set_sender is set and matches the
2491 address, except that the null address can always be set by any user. The
2492 test for this happens later, when the value given here is ignored when not
2493 permitted. For an untrusted user, the actual sender is still put in Sender:
2494 if it doesn't match the From: header (unless no_local_from_check is set).
2495 The data can follow the -f or be in the next argument. The -r switch is an
2496 obsolete form of -f but since there appear to be programs out there that
2497 use anything that sendmail has ever supported, better accept it - the
2498 synonymizing is done before the switch above.
2499
2500 At this stage, we must allow domain literal addresses, because we don't
2501 know what the setting of allow_domain_literals is yet. Ditto for trailing
2502 dots and strip_trailing_dot. */
2503
2504 case 'f':
2505 {
2506 int dummy_start, dummy_end;
2507 uschar *errmess;
2508 if (*argrest == 0)
2509 {
2510 if (i+1 < argc) argrest = argv[++i]; else
2511 { badarg = TRUE; break; }
2512 }
2513 if (*argrest == 0)
2514 sender_address = string_sprintf(""); /* Ensure writeable memory */
2515 else
2516 {
2517 uschar *temp = argrest + Ustrlen(argrest) - 1;
2518 while (temp >= argrest && isspace(*temp)) temp--;
2519 if (temp >= argrest && *temp == '.') f_end_dot = TRUE;
2520 allow_domain_literals = TRUE;
2521 strip_trailing_dot = TRUE;
2522 #ifdef SUPPORT_I18N
2523 allow_utf8_domains = TRUE;
2524 #endif
2525 sender_address = parse_extract_address(argrest, &errmess,
2526 &dummy_start, &dummy_end, &sender_address_domain, TRUE);
2527 #ifdef SUPPORT_I18N
2528 message_smtputf8 = string_is_utf8(sender_address);
2529 allow_utf8_domains = FALSE;
2530 #endif
2531 allow_domain_literals = FALSE;
2532 strip_trailing_dot = FALSE;
2533 if (!sender_address)
2534 exim_fail("exim: bad -f address \"%s\": %s\n", argrest, errmess);
2535 }
2536 f.sender_address_forced = TRUE;
2537 }
2538 break;
2539
2540 /* -G: sendmail invocation to specify that it's a gateway submission and
2541 sendmail may complain about problems instead of fixing them.
2542 We make it equivalent to an ACL "control = suppress_local_fixups" and do
2543 not at this time complain about problems. */
2544
2545 case 'G':
2546 flag_G = TRUE;
2547 break;
2548
2549 /* -h: Set the hop count for an incoming message. Exim does not currently
2550 support this; it always computes it by counting the Received: headers.
2551 To put it in will require a change to the spool header file format. */
2552
2553 case 'h':
2554 if (*argrest == 0)
2555 {
2556 if(++i < argc) argrest = argv[i]; else
2557 { badarg = TRUE; break; }
2558 }
2559 if (!isdigit(*argrest)) badarg = TRUE;
2560 break;
2561
2562
2563 /* -i: Set flag so dot doesn't end non-SMTP input (same as -oi, seems
2564 not to be documented for sendmail but mailx (at least) uses it) */
2565
2566 case 'i':
2567 if (*argrest == 0) f.dot_ends = FALSE; else badarg = TRUE;
2568 break;
2569
2570
2571 /* -L: set the identifier used for syslog; equivalent to setting
2572 syslog_processname in the config file, but needs to be an admin option. */
2573
2574 case 'L':
2575 if (*argrest == '\0')
2576 {
2577 if(++i < argc) argrest = argv[i]; else
2578 { badarg = TRUE; break; }
2579 }
2580 if ((sz = Ustrlen(argrest)) > 32)
2581 exim_fail("exim: the -L syslog name is too long: \"%s\"\n", argrest);
2582 if (sz < 1)
2583 exim_fail("exim: the -L syslog name is too short\n");
2584 cmdline_syslog_name = argrest;
2585 break;
2586
2587 case 'M':
2588 receiving_message = FALSE;
2589
2590 /* -MC: continue delivery of another message via an existing open
2591 file descriptor. This option is used for an internal call by the
2592 smtp transport when there is a pending message waiting to go to an
2593 address to which it has got a connection. Five subsequent arguments are
2594 required: transport name, host name, IP address, sequence number, and
2595 message_id. Transports may decline to create new processes if the sequence
2596 number gets too big. The channel is stdin. This (-MC) must be the last
2597 argument. There's a subsequent check that the real-uid is privileged.
2598
2599 If we are running in the test harness. delay for a bit, to let the process
2600 that set this one up complete. This makes for repeatability of the logging,
2601 etc. output. */
2602
2603 if (Ustrcmp(argrest, "C") == 0)
2604 {
2605 union sockaddr_46 interface_sock;
2606 EXIM_SOCKLEN_T size = sizeof(interface_sock);
2607
2608 if (argc != i + 6)
2609 exim_fail("exim: too many or too few arguments after -MC\n");
2610
2611 if (msg_action_arg >= 0)
2612 exim_fail("exim: incompatible arguments\n");
2613
2614 continue_transport = argv[++i];
2615 continue_hostname = argv[++i];
2616 continue_host_address = argv[++i];
2617 continue_sequence = Uatoi(argv[++i]);
2618 msg_action = MSG_DELIVER;
2619 msg_action_arg = ++i;
2620 forced_delivery = TRUE;
2621 queue_run_pid = passed_qr_pid;
2622 queue_run_pipe = passed_qr_pipe;
2623
2624 if (!mac_ismsgid(argv[i]))
2625 exim_fail("exim: malformed message id %s after -MC option\n",
2626 argv[i]);
2627
2628 /* Set up $sending_ip_address and $sending_port, unless proxied */
2629
2630 if (!continue_proxy_cipher)
2631 if (getsockname(fileno(stdin), (struct sockaddr *)(&interface_sock),
2632 &size) == 0)
2633 sending_ip_address = host_ntoa(-1, &interface_sock, NULL,
2634 &sending_port);
2635 else
2636 exim_fail("exim: getsockname() failed after -MC option: %s\n",
2637 strerror(errno));
2638
2639 if (f.running_in_test_harness) millisleep(500);
2640 break;
2641 }
2642
2643 else if (*argrest == 'C' && argrest[1] && !argrest[2])
2644 {
2645 switch(argrest[1])
2646 {
2647 /* -MCA: set the smtp_authenticated flag; this is useful only when it
2648 precedes -MC (see above). The flag indicates that the host to which
2649 Exim is connected has accepted an AUTH sequence. */
2650
2651 case 'A': f.smtp_authenticated = TRUE; break;
2652
2653 /* -MCD: set the smtp_use_dsn flag; this indicates that the host
2654 that exim is connected to supports the esmtp extension DSN */
2655
2656 case 'D': smtp_peer_options |= OPTION_DSN; break;
2657
2658 /* -MCG: set the queue name, to a non-default value */
2659
2660 case 'G': if (++i < argc) queue_name = string_copy(argv[i]);
2661 else badarg = TRUE;
2662 break;
2663
2664 /* -MCK: the peer offered CHUNKING. Must precede -MC */
2665
2666 case 'K': smtp_peer_options |= OPTION_CHUNKING; break;
2667
2668 /* -MCP: set the smtp_use_pipelining flag; this is useful only when
2669 it preceded -MC (see above) */
2670
2671 case 'P': smtp_peer_options |= OPTION_PIPE; break;
2672
2673 /* -MCQ: pass on the pid of the queue-running process that started
2674 this chain of deliveries and the fd of its synchronizing pipe; this
2675 is useful only when it precedes -MC (see above) */
2676
2677 case 'Q': if (++i < argc) passed_qr_pid = (pid_t)(Uatol(argv[i]));
2678 else badarg = TRUE;
2679 if (++i < argc) passed_qr_pipe = (int)(Uatol(argv[i]));
2680 else badarg = TRUE;
2681 break;
2682
2683 /* -MCS: set the smtp_use_size flag; this is useful only when it
2684 precedes -MC (see above) */
2685
2686 case 'S': smtp_peer_options |= OPTION_SIZE; break;
2687
2688 #ifdef SUPPORT_TLS
2689 /* -MCt: similar to -MCT below but the connection is still open
2690 via a proxy proces which handles the TLS context and coding.
2691 Require three arguments for the proxied local address and port,
2692 and the TLS cipher. */
2693
2694 case 't': if (++i < argc) sending_ip_address = argv[i];
2695 else badarg = TRUE;
2696 if (++i < argc) sending_port = (int)(Uatol(argv[i]));
2697 else badarg = TRUE;
2698 if (++i < argc) continue_proxy_cipher = argv[i];
2699 else badarg = TRUE;
2700 /*FALLTHROUGH*/
2701
2702 /* -MCT: set the tls_offered flag; this is useful only when it
2703 precedes -MC (see above). The flag indicates that the host to which
2704 Exim is connected has offered TLS support. */
2705
2706 case 'T': smtp_peer_options |= OPTION_TLS; break;
2707 #endif
2708
2709 default: badarg = TRUE; break;
2710 }
2711 break;
2712 }
2713
2714 #if defined(SUPPORT_TLS) && defined(EXPERIMENTAL_REQUIRETLS)
2715 /* -MS set REQUIRETLS on (new) message */
2716
2717 else if (*argrest == 'S')
2718 {
2719 tls_requiretls |= REQUIRETLS_MSG;
2720 break;
2721 }
2722 #endif
2723
2724 /* -M[x]: various operations on the following list of message ids:
2725 -M deliver the messages, ignoring next retry times and thawing
2726 -Mc deliver the messages, checking next retry times, no thawing
2727 -Mf freeze the messages
2728 -Mg give up on the messages
2729 -Mt thaw the messages
2730 -Mrm remove the messages
2731 In the above cases, this must be the last option. There are also the
2732 following options which are followed by a single message id, and which
2733 act on that message. Some of them use the "recipient" addresses as well.
2734 -Mar add recipient(s)
2735 -Mmad mark all recipients delivered
2736 -Mmd mark recipients(s) delivered
2737 -Mes edit sender
2738 -Mset load a message for use with -be
2739 -Mvb show body
2740 -Mvc show copy (of whole message, in RFC 2822 format)
2741 -Mvh show header
2742 -Mvl show log
2743 */
2744
2745 else if (*argrest == 0)
2746 {
2747 msg_action = MSG_DELIVER;
2748 forced_delivery = f.deliver_force_thaw = TRUE;
2749 }
2750 else if (Ustrcmp(argrest, "ar") == 0)
2751 {
2752 msg_action = MSG_ADD_RECIPIENT;
2753 one_msg_action = TRUE;
2754 }
2755 else if (Ustrcmp(argrest, "c") == 0) msg_action = MSG_DELIVER;
2756 else if (Ustrcmp(argrest, "es") == 0)
2757 {
2758 msg_action = MSG_EDIT_SENDER;
2759 one_msg_action = TRUE;
2760 }
2761 else if (Ustrcmp(argrest, "f") == 0) msg_action = MSG_FREEZE;
2762 else if (Ustrcmp(argrest, "g") == 0)
2763 {
2764 msg_action = MSG_DELIVER;
2765 deliver_give_up = TRUE;
2766 }
2767 else if (Ustrcmp(argrest, "mad") == 0)
2768 {
2769 msg_action = MSG_MARK_ALL_DELIVERED;
2770 }
2771 else if (Ustrcmp(argrest, "md") == 0)
2772 {
2773 msg_action = MSG_MARK_DELIVERED;
2774 one_msg_action = TRUE;
2775 }
2776 else if (Ustrcmp(argrest, "rm") == 0) msg_action = MSG_REMOVE;
2777 else if (Ustrcmp(argrest, "set") == 0)
2778 {
2779 msg_action = MSG_LOAD;
2780 one_msg_action = TRUE;
2781 }
2782 else if (Ustrcmp(argrest, "t") == 0) msg_action = MSG_THAW;
2783 else if (Ustrcmp(argrest, "vb") == 0)
2784 {
2785 msg_action = MSG_SHOW_BODY;
2786 one_msg_action = TRUE;
2787 }
2788 else if (Ustrcmp(argrest, "vc") == 0)
2789 {
2790 msg_action = MSG_SHOW_COPY;
2791 one_msg_action = TRUE;
2792 }
2793 else if (Ustrcmp(argrest, "vh") == 0)
2794 {
2795 msg_action = MSG_SHOW_HEADER;
2796 one_msg_action = TRUE;
2797 }
2798 else if (Ustrcmp(argrest, "vl") == 0)
2799 {
2800 msg_action = MSG_SHOW_LOG;
2801 one_msg_action = TRUE;
2802 }
2803 else { badarg = TRUE; break; }
2804
2805 /* All the -Mxx options require at least one message id. */
2806
2807 msg_action_arg = i + 1;
2808 if (msg_action_arg >= argc)
2809 exim_fail("exim: no message ids given after %s option\n", arg);
2810
2811 /* Some require only message ids to follow */
2812
2813 if (!one_msg_action)
2814 {
2815 int j;
2816 for (j = msg_action_arg; j < argc; j++) if (!mac_ismsgid(argv[j]))
2817 exim_fail("exim: malformed message id %s after %s option\n",
2818 argv[j], arg);
2819 goto END_ARG; /* Remaining args are ids */
2820 }
2821
2822 /* Others require only one message id, possibly followed by addresses,
2823 which will be handled as normal arguments. */
2824
2825 else
2826 {
2827 if (!mac_ismsgid(argv[msg_action_arg]))
2828 exim_fail("exim: malformed message id %s after %s option\n",
2829 argv[msg_action_arg], arg);
2830 i++;
2831 }
2832 break;
2833
2834
2835 /* Some programs seem to call the -om option without the leading o;
2836 for sendmail it askes for "me too". Exim always does this. */
2837
2838 case 'm':
2839 if (*argrest != 0) badarg = TRUE;
2840 break;
2841
2842
2843 /* -N: don't do delivery - a debugging option that stops transports doing
2844 their thing. It implies debugging at the D_v level. */
2845
2846 case 'N':
2847 if (*argrest == 0)
2848 {
2849 f.dont_deliver = TRUE;
2850 debug_selector |= D_v;
2851 debug_file = stderr;
2852 }
2853 else badarg = TRUE;
2854 break;
2855
2856
2857 /* -n: This means "don't alias" in sendmail, apparently.
2858 For normal invocations, it has no effect.
2859 It may affect some other options. */
2860
2861 case 'n':
2862 flag_n = TRUE;
2863 break;
2864
2865 /* -O: Just ignore it. In sendmail, apparently -O option=value means set
2866 option to the specified value. This form uses long names. We need to handle
2867 -O option=value and -Ooption=value. */
2868
2869 case 'O':
2870 if (*argrest == 0)
2871 {
2872 if (++i >= argc)
2873 exim_fail("exim: string expected after -O\n");
2874 }
2875 break;
2876
2877 case 'o':
2878
2879 /* -oA: Set an argument for the bi command (sendmail's "alternate alias
2880 file" option). */
2881
2882 if (*argrest == 'A')
2883 {
2884 alias_arg = argrest + 1;
2885 if (alias_arg[0] == 0)
2886 {
2887 if (i+1 < argc) alias_arg = argv[++i]; else
2888 exim_fail("exim: string expected after -oA\n");
2889 }
2890 }
2891
2892 /* -oB: Set a connection message max value for remote deliveries */
2893
2894 else if (*argrest == 'B')
2895 {
2896 uschar *p = argrest + 1;
2897 if (p[0] == 0)
2898 {
2899 if (i+1 < argc && isdigit((argv[i+1][0]))) p = argv[++i]; else
2900 {
2901 connection_max_messages = 1;
2902 p = NULL;
2903 }
2904 }
2905
2906 if (p != NULL)
2907 {
2908 if (!isdigit(*p))
2909 exim_fail("exim: number expected after -oB\n");
2910 connection_max_messages = Uatoi(p);
2911 }
2912 }
2913
2914 /* -odb: background delivery */
2915
2916 else if (Ustrcmp(argrest, "db") == 0)
2917 {
2918 f.synchronous_delivery = FALSE;
2919 arg_queue_only = FALSE;
2920 queue_only_set = TRUE;
2921 }
2922
2923 /* -odf: foreground delivery (smail-compatible option); same effect as
2924 -odi: interactive (synchronous) delivery (sendmail-compatible option)
2925 */
2926
2927 else if (Ustrcmp(argrest, "df") == 0 || Ustrcmp(argrest, "di") == 0)
2928 {
2929 f.synchronous_delivery = TRUE;
2930 arg_queue_only = FALSE;
2931 queue_only_set = TRUE;
2932 }
2933
2934 /* -odq: queue only */
2935
2936 else if (Ustrcmp(argrest, "dq") == 0)
2937 {
2938 f.synchronous_delivery = FALSE;
2939 arg_queue_only = TRUE;
2940 queue_only_set = TRUE;
2941 }
2942
2943 /* -odqs: queue SMTP only - do local deliveries and remote routing,
2944 but no remote delivery */
2945
2946 else if (Ustrcmp(argrest, "dqs") == 0)
2947 {
2948 f.queue_smtp = TRUE;
2949 arg_queue_only = FALSE;
2950 queue_only_set = TRUE;
2951 }
2952
2953 /* -oex: Sendmail error flags. As these are also accepted without the
2954 leading -o prefix, for compatibility with vacation and other callers,
2955 they are handled with -e above. */
2956
2957 /* -oi: Set flag so dot doesn't end non-SMTP input (same as -i)
2958 -oitrue: Another sendmail syntax for the same */
2959
2960 else if (Ustrcmp(argrest, "i") == 0 ||
2961 Ustrcmp(argrest, "itrue") == 0)
2962 f.dot_ends = FALSE;
2963
2964 /* -oM*: Set various characteristics for an incoming message; actually
2965 acted on for trusted callers only. */
2966
2967 else if (*argrest == 'M')
2968 {
2969 if (i+1 >= argc)
2970 exim_fail("exim: data expected after -o%s\n", argrest);
2971
2972 /* -oMa: Set sender host address */
2973
2974 if (Ustrcmp(argrest, "Ma") == 0) sender_host_address = argv[++i];
2975
2976 /* -oMaa: Set authenticator name */
2977
2978 else if (Ustrcmp(argrest, "Maa") == 0)
2979 sender_host_authenticated = argv[++i];
2980
2981 /* -oMas: setting authenticated sender */
2982
2983 else if (Ustrcmp(argrest, "Mas") == 0) authenticated_sender = argv[++i];
2984
2985 /* -oMai: setting authenticated id */
2986
2987 else if (Ustrcmp(argrest, "Mai") == 0) authenticated_id = argv[++i];
2988
2989 /* -oMi: Set incoming interface address */
2990
2991 else if (Ustrcmp(argrest, "Mi") == 0) interface_address = argv[++i];
2992
2993 /* -oMm: Message reference */
2994
2995 else if (Ustrcmp(argrest, "Mm") == 0)
2996 {
2997 if (!mac_ismsgid(argv[i+1]))
2998 exim_fail("-oMm must be a valid message ID\n");
2999 if (!f.trusted_config)
3000 exim_fail("-oMm must be called by a trusted user/config\n");
3001 message_reference = argv[++i];
3002 }
3003
3004 /* -oMr: Received protocol */
3005
3006 else if (Ustrcmp(argrest, "Mr") == 0)
3007
3008 if (received_protocol)
3009 exim_fail("received_protocol is set already\n");
3010 else
3011 received_protocol = argv[++i];
3012
3013 /* -oMs: Set sender host name */
3014
3015 else if (Ustrcmp(argrest, "Ms") == 0) sender_host_name = argv[++i];
3016
3017 /* -oMt: Set sender ident */
3018
3019 else if (Ustrcmp(argrest, "Mt") == 0)
3020 {
3021 sender_ident_set = TRUE;
3022 sender_ident = argv[++i];
3023 }
3024
3025 /* Else a bad argument */
3026
3027 else
3028 {
3029 badarg = TRUE;
3030 break;
3031 }
3032 }
3033
3034 /* -om: Me-too flag for aliases. Exim always does this. Some programs
3035 seem to call this as -m (undocumented), so that is also accepted (see
3036 above). */
3037
3038 else if (Ustrcmp(argrest, "m") == 0) {}
3039
3040 /* -oo: An ancient flag for old-style addresses which still seems to
3041 crop up in some calls (see in SCO). */
3042
3043 else if (Ustrcmp(argrest, "o") == 0) {}
3044
3045 /* -oP <name>: set pid file path for daemon */
3046
3047 else if (Ustrcmp(argrest, "P") == 0)
3048 override_pid_file_path = argv[++i];
3049
3050 /* -or <n>: set timeout for non-SMTP acceptance
3051 -os <n>: set timeout for SMTP acceptance */
3052
3053 else if (*argrest == 'r' || *argrest == 's')
3054 {
3055 int *tp = (*argrest == 'r')?
3056 &arg_receive_timeout : &arg_smtp_receive_timeout;
3057 if (argrest[1] == 0)
3058 {
3059 if (i+1 < argc) *tp= readconf_readtime(argv[++i], 0, FALSE);
3060 }
3061 else *tp = readconf_readtime(argrest + 1, 0, FALSE);
3062 if (*tp < 0)
3063 exim_fail("exim: bad time value %s: abandoned\n", argv[i]);
3064 }
3065
3066 /* -oX <list>: Override local_interfaces and/or default daemon ports */
3067
3068 else if (Ustrcmp(argrest, "X") == 0)
3069 override_local_interfaces = argv[++i];
3070
3071 /* Unknown -o argument */
3072
3073 else badarg = TRUE;
3074 break;
3075
3076
3077 /* -ps: force Perl startup; -pd force delayed Perl startup */
3078
3079 case 'p':
3080 #ifdef EXIM_PERL
3081 if (*argrest == 's' && argrest[1] == 0)
3082 {
3083 perl_start_option = 1;
3084 break;
3085 }
3086 if (*argrest == 'd' && argrest[1] == 0)
3087 {
3088 perl_start_option = -1;
3089 break;
3090 }
3091 #endif
3092
3093 /* -panythingelse is taken as the Sendmail-compatible argument -prval:sval,
3094 which sets the host protocol and host name */
3095
3096 if (*argrest == 0)
3097 if (i+1 < argc)
3098 argrest = argv[++i];
3099 else
3100 { badarg = TRUE; break; }
3101
3102 if (*argrest != 0)
3103 {
3104 uschar *hn;
3105
3106 if (received_protocol)
3107 exim_fail("received_protocol is set already\n");
3108
3109 hn = Ustrchr(argrest, ':');
3110 if (hn == NULL)
3111 received_protocol = argrest;
3112 else
3113 {
3114 int old_pool = store_pool;
3115 store_pool = POOL_PERM;
3116 received_protocol = string_copyn(argrest, hn - argrest);
3117 store_pool = old_pool;
3118 sender_host_name = hn + 1;
3119 }
3120 }
3121 break;
3122
3123
3124 case 'q':
3125 receiving_message = FALSE;
3126 if (queue_interval >= 0)
3127 exim_fail("exim: -q specified more than once\n");
3128
3129 /* -qq...: Do queue runs in a 2-stage manner */
3130
3131 if (*argrest == 'q')
3132 {
3133 f.queue_2stage = TRUE;
3134 argrest++;
3135 }
3136
3137 /* -qi...: Do only first (initial) deliveries */
3138
3139 if (*argrest == 'i')
3140 {
3141 f.queue_run_first_delivery = TRUE;
3142 argrest++;
3143 }
3144
3145 /* -qf...: Run the queue, forcing deliveries
3146 -qff..: Ditto, forcing thawing as well */
3147
3148 if (*argrest == 'f')
3149 {
3150 f.queue_run_force = TRUE;
3151 if (*++argrest == 'f')
3152 {
3153 f.deliver_force_thaw = TRUE;
3154 argrest++;
3155 }
3156 }
3157
3158 /* -q[f][f]l...: Run the queue only on local deliveries */
3159
3160 if (*argrest == 'l')
3161 {
3162 f.queue_run_local = TRUE;
3163 argrest++;
3164 }
3165
3166 /* -q[f][f][l][G<name>]... Work on the named queue */
3167
3168 if (*argrest == 'G')
3169 {
3170 int i;
3171 for (argrest++, i = 0; argrest[i] && argrest[i] != '/'; ) i++;
3172 queue_name = string_copyn(argrest, i);
3173 argrest += i;
3174 if (*argrest == '/') argrest++;
3175 }
3176
3177 /* -q[f][f][l][G<name>]: Run the queue, optionally forced, optionally local
3178 only, optionally named, optionally starting from a given message id. */
3179
3180 if (*argrest == 0 &&
3181 (i + 1 >= argc || argv[i+1][0] == '-' || mac_ismsgid(argv[i+1])))
3182 {
3183 queue_interval = 0;
3184 if (i+1 < argc && mac_ismsgid(argv[i+1]))
3185 start_queue_run_id = argv[++i];
3186 if (i+1 < argc && mac_ismsgid(argv[i+1]))
3187 stop_queue_run_id = argv[++i];
3188 }
3189
3190 /* -q[f][f][l][G<name>/]<n>: Run the queue at regular intervals, optionally
3191 forced, optionally local only, optionally named. */
3192
3193 else if ((queue_interval = readconf_readtime(*argrest ? argrest : argv[++i],
3194 0, FALSE)) <= 0)
3195 exim_fail("exim: bad time value %s: abandoned\n", argv[i]);
3196 break;
3197
3198
3199 case 'R': /* Synonymous with -qR... */
3200 receiving_message = FALSE;
3201
3202 /* -Rf: As -R (below) but force all deliveries,
3203 -Rff: Ditto, but also thaw all frozen messages,
3204 -Rr: String is regex
3205 -Rrf: Regex and force
3206 -Rrff: Regex and force and thaw
3207
3208 in all cases provided there are no further characters in this
3209 argument. */
3210
3211 if (*argrest != 0)
3212 {
3213 int i;
3214 for (i = 0; i < nelem(rsopts); i++)
3215 if (Ustrcmp(argrest, rsopts[i]) == 0)
3216 {
3217 if (i != 2) f.queue_run_force = TRUE;
3218 if (i >= 2) f.deliver_selectstring_regex = TRUE;
3219 if (i == 1 || i == 4) f.deliver_force_thaw = TRUE;
3220 argrest += Ustrlen(rsopts[i]);
3221 }
3222 }
3223
3224 /* -R: Set string to match in addresses for forced queue run to
3225 pick out particular messages. */
3226
3227 if (*argrest)
3228 deliver_selectstring = argrest;
3229 else if (i+1 < argc)
3230 deliver_selectstring = argv[++i];
3231 else
3232 exim_fail("exim: string expected after -R\n");
3233 break;
3234
3235
3236 /* -r: an obsolete synonym for -f (see above) */
3237
3238
3239 /* -S: Like -R but works on sender. */
3240
3241 case 'S': /* Synonymous with -qS... */
3242 receiving_message = FALSE;
3243
3244 /* -Sf: As -S (below) but force all deliveries,
3245 -Sff: Ditto, but also thaw all frozen messages,
3246 -Sr: String is regex
3247 -Srf: Regex and force
3248 -Srff: Regex and force and thaw
3249
3250 in all cases provided there are no further characters in this
3251 argument. */
3252
3253 if (*argrest)
3254 {
3255 int i;
3256 for (i = 0; i < nelem(rsopts); i++)
3257 if (Ustrcmp(argrest, rsopts[i]) == 0)
3258 {
3259 if (i != 2) f.queue_run_force = TRUE;
3260 if (i >= 2) f.deliver_selectstring_sender_regex = TRUE;
3261 if (i == 1 || i == 4) f.deliver_force_thaw = TRUE;
3262 argrest += Ustrlen(rsopts[i]);
3263 }
3264 }
3265
3266 /* -S: Set string to match in addresses for forced queue run to
3267 pick out particular messages. */
3268
3269 if (*argrest)
3270 deliver_selectstring_sender = argrest;
3271 else if (i+1 < argc)
3272 deliver_selectstring_sender = argv[++i];
3273 else
3274 exim_fail("exim: string expected after -S\n");
3275 break;
3276
3277 /* -Tqt is an option that is exclusively for use by the testing suite.
3278 It is not recognized in other circumstances. It allows for the setting up
3279 of explicit "queue times" so that various warning/retry things can be
3280 tested. Otherwise variability of clock ticks etc. cause problems. */
3281
3282 case 'T':
3283 if (f.running_in_test_harness && Ustrcmp(argrest, "qt") == 0)
3284 fudged_queue_times = argv[++i];
3285 else badarg = TRUE;
3286 break;
3287
3288
3289 /* -t: Set flag to extract recipients from body of message. */
3290
3291 case 't':
3292 if (*argrest == 0) extract_recipients = TRUE;
3293
3294 /* -ti: Set flag to extract recipients from body of message, and also
3295 specify that dot does not end the message. */
3296
3297 else if (Ustrcmp(argrest, "i") == 0)
3298 {
3299 extract_recipients = TRUE;
3300 f.dot_ends = FALSE;
3301 }
3302
3303 /* -tls-on-connect: don't wait for STARTTLS (for old clients) */
3304
3305 #ifdef SUPPORT_TLS
3306 else if (Ustrcmp(argrest, "ls-on-connect") == 0) tls_in.on_connect = TRUE;
3307 #endif
3308
3309 else badarg = TRUE;
3310 break;
3311
3312
3313 /* -U: This means "initial user submission" in sendmail, apparently. The
3314 doc claims that in future sendmail may refuse syntactically invalid
3315 messages instead of fixing them. For the moment, we just ignore it. */
3316
3317 case 'U':
3318 break;
3319
3320
3321 /* -v: verify things - this is a very low-level debugging */
3322
3323 case 'v':
3324 if (*argrest == 0)
3325 {
3326 debug_selector |= D_v;
3327 debug_file = stderr;
3328 }
3329 else badarg = TRUE;
3330 break;
3331
3332
3333 /* -x: AIX uses this to indicate some fancy 8-bit character stuff:
3334
3335 The -x flag tells the sendmail command that mail from a local
3336 mail program has National Language Support (NLS) extended characters
3337 in the body of the mail item. The sendmail command can send mail with
3338 extended NLS characters across networks that normally corrupts these
3339 8-bit characters.
3340
3341 As Exim is 8-bit clean, it just ignores this flag. */
3342
3343 case 'x':
3344 if (*argrest != 0) badarg = TRUE;
3345 break;
3346
3347 /* -X: in sendmail: takes one parameter, logfile, and sends debugging
3348 logs to that file. We swallow the parameter and otherwise ignore it. */
3349
3350 case 'X':
3351 if (*argrest == '\0')
3352 if (++i >= argc)
3353 exim_fail("exim: string expected after -X\n");
3354 break;
3355
3356 case 'z':
3357 if (*argrest == '\0')
3358 if (++i < argc)
3359 log_oneline = argv[i];
3360 else
3361 exim_fail("exim: file name expected after %s\n", argv[i-1]);
3362 break;
3363
3364 /* All other initial characters are errors */
3365
3366 default:
3367 badarg = TRUE;
3368 break;
3369 } /* End of high-level switch statement */
3370
3371 /* Failed to recognize the option, or syntax error */
3372
3373 if (badarg)
3374 exim_fail("exim abandoned: unknown, malformed, or incomplete "
3375 "option %s\n", arg);
3376 }
3377
3378
3379 /* If -R or -S have been specified without -q, assume a single queue run. */
3380
3381 if ( (deliver_selectstring || deliver_selectstring_sender)
3382 && queue_interval < 0)
3383 queue_interval = 0;
3384
3385
3386 END_ARG:
3387 /* If usage_wanted is set we call the usage function - which never returns */
3388 if (usage_wanted) exim_usage(called_as);
3389
3390 /* Arguments have been processed. Check for incompatibilities. */
3391 if ((
3392 (smtp_input || extract_recipients || recipients_arg < argc) &&
3393 (f.daemon_listen || queue_interval >= 0 || bi_option ||
3394 test_retry_arg >= 0 || test_rewrite_arg >= 0 ||
3395 filter_test != FTEST_NONE || (msg_action_arg > 0 && !one_msg_action))
3396 ) ||
3397 (
3398 msg_action_arg > 0 &&
3399 (f.daemon_listen || queue_interval > 0 || list_options ||
3400 (checking && msg_action != MSG_LOAD) ||
3401 bi_option || test_retry_arg >= 0 || test_rewrite_arg >= 0)
3402 ) ||
3403 (
3404 (f.daemon_listen || queue_interval > 0) &&
3405 (sender_address != NULL || list_options || list_queue || checking ||
3406 bi_option)
3407 ) ||
3408 (
3409 f.daemon_listen && queue_interval == 0
3410 ) ||
3411 (
3412 f.inetd_wait_mode && queue_interval >= 0
3413 ) ||
3414 (
3415 list_options &&
3416 (checking || smtp_input || extract_recipients ||
3417 filter_test != FTEST_NONE || bi_option)
3418 ) ||
3419 (
3420 verify_address_mode &&
3421 (f.address_test_mode || smtp_input || extract_recipients ||
3422 filter_test != FTEST_NONE || bi_option)
3423 ) ||
3424 (
3425 f.address_test_mode && (smtp_input || extract_recipients ||
3426 filter_test != FTEST_NONE || bi_option)
3427 ) ||
3428 (
3429 smtp_input && (sender_address != NULL || filter_test != FTEST_NONE ||
3430 extract_recipients)
3431 ) ||
3432 (
3433 deliver_selectstring != NULL && queue_interval < 0
3434 ) ||
3435 (
3436 msg_action == MSG_LOAD &&
3437 (!expansion_test || expansion_test_message != NULL)
3438 )
3439 )
3440 exim_fail("exim: incompatible command-line options or arguments\n");
3441
3442 /* If debugging is set up, set the file and the file descriptor to pass on to
3443 child processes. It should, of course, be 2 for stderr. Also, force the daemon
3444 to run in the foreground. */
3445
3446 if (debug_selector != 0)
3447 {
3448 debug_file = stderr;
3449 debug_fd = fileno(debug_file);
3450 f.background_daemon = FALSE;
3451 if (f.running_in_test_harness) millisleep(100); /* lets caller finish */
3452 if (debug_selector != D_v) /* -v only doesn't show this */
3453 {
3454 debug_printf("Exim version %s uid=%ld gid=%ld pid=%d D=%x\n",
3455 version_string, (long int)real_uid, (long int)real_gid, (int)getpid(),
3456 debug_selector);
3457 if (!version_printed)
3458 show_whats_supported(stderr);
3459 }
3460 }
3461
3462 /* When started with root privilege, ensure that the limits on the number of
3463 open files and the number of processes (where that is accessible) are
3464 sufficiently large, or are unset, in case Exim has been called from an
3465 environment where the limits are screwed down. Not all OS have the ability to
3466 change some of these limits. */
3467
3468 if (unprivileged)
3469 {
3470 DEBUG(D_any) debug_print_ids(US"Exim has no root privilege:");
3471 }
3472 else
3473 {
3474 struct rlimit rlp;
3475
3476 #ifdef RLIMIT_NOFILE
3477 if (getrlimit(RLIMIT_NOFILE, &rlp) < 0)
3478 {
3479 log_write(0, LOG_MAIN|LOG_PANIC, "getrlimit(RLIMIT_NOFILE) failed: %s",
3480 strerror(errno));
3481 rlp.rlim_cur = rlp.rlim_max = 0;
3482 }
3483
3484 /* I originally chose 1000 as a nice big number that was unlikely to
3485 be exceeded. It turns out that some older OS have a fixed upper limit of
3486 256. */
3487
3488 if (rlp.rlim_cur < 1000)
3489 {
3490 rlp.rlim_cur = rlp.rlim_max = 1000;
3491 if (setrlimit(RLIMIT_NOFILE, &rlp) < 0)
3492 {
3493 rlp.rlim_cur = rlp.rlim_max = 256;
3494 if (setrlimit(RLIMIT_NOFILE, &rlp) < 0)
3495 log_write(0, LOG_MAIN|LOG_PANIC, "setrlimit(RLIMIT_NOFILE) failed: %s",
3496 strerror(errno));
3497 }
3498 }
3499 #endif
3500
3501 #ifdef RLIMIT_NPROC
3502 if (getrlimit(RLIMIT_NPROC, &rlp) < 0)
3503 {
3504 log_write(0, LOG_MAIN|LOG_PANIC, "getrlimit(RLIMIT_NPROC) failed: %s",
3505 strerror(errno));
3506 rlp.rlim_cur = rlp.rlim_max = 0;
3507 }
3508
3509 #ifdef RLIM_INFINITY
3510 if (rlp.rlim_cur != RLIM_INFINITY && rlp.rlim_cur < 1000)
3511 {
3512 rlp.rlim_cur = rlp.rlim_max = RLIM_INFINITY;
3513 #else
3514 if (rlp.rlim_cur < 1000)
3515 {
3516 rlp.rlim_cur = rlp.rlim_max = 1000;
3517 #endif
3518 if (setrlimit(RLIMIT_NPROC, &rlp) < 0)
3519 log_write(0, LO