Add new errors mail_4xx, data_4xx, lost_connection, tls_required.
[exim.git] / src / src / exim.c
1 /* $Cambridge: exim/src/src/exim.c,v 1.37 2006/03/09 15:10:16 ph10 Exp $ */
2
3 /*************************************************
4 * Exim - an Internet mail transport agent *
5 *************************************************/
6
7 /* Copyright (c) University of Cambridge 1995 - 2006 */
8 /* See the file NOTICE for conditions of use and distribution. */
9
10
11 /* The main function: entry point, initialization, and high-level control.
12 Also a few functions that don't naturally fit elsewhere. */
13
14
15 #include "exim.h"
16
17
18
19 /*************************************************
20 * Function interface to store functions *
21 *************************************************/
22
23 /* We need some real functions to pass to the PCRE regular expression library
24 for store allocation via Exim's store manager. The normal calls are actually
25 macros that pass over location information to make tracing easier. These
26 functions just interface to the standard macro calls. A good compiler will
27 optimize out the tail recursion and so not make them too expensive. There
28 are two sets of functions; one for use when we want to retain the compiled
29 regular expression for a long time; the other for short-term use. */
30
31 static void *
32 function_store_get(size_t size)
33 {
34 return store_get((int)size);
35 }
36
37 static void
38 function_dummy_free(void *block) { block = block; }
39
40 static void *
41 function_store_malloc(size_t size)
42 {
43 return store_malloc((int)size);
44 }
45
46 static void
47 function_store_free(void *block)
48 {
49 store_free(block);
50 }
51
52
53
54
55 /*************************************************
56 * Compile regular expression and panic on fail *
57 *************************************************/
58
59 /* This function is called when failure to compile a regular expression leads
60 to a panic exit. In other cases, pcre_compile() is called directly. In many
61 cases where this function is used, the results of the compilation are to be
62 placed in long-lived store, so we temporarily reset the store management
63 functions that PCRE uses if the use_malloc flag is set.
64
65 Argument:
66 pattern the pattern to compile
67 caseless TRUE if caseless matching is required
68 use_malloc TRUE if compile into malloc store
69
70 Returns: pointer to the compiled pattern
71 */
72
73 const pcre *
74 regex_must_compile(uschar *pattern, BOOL caseless, BOOL use_malloc)
75 {
76 int offset;
77 int options = PCRE_COPT;
78 const pcre *yield;
79 const uschar *error;
80 if (use_malloc)
81 {
82 pcre_malloc = function_store_malloc;
83 pcre_free = function_store_free;
84 }
85 if (caseless) options |= PCRE_CASELESS;
86 yield = pcre_compile(CS pattern, options, (const char **)&error, &offset, NULL);
87 pcre_malloc = function_store_get;
88 pcre_free = function_dummy_free;
89 if (yield == NULL)
90 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "regular expression error: "
91 "%s at offset %d while compiling %s", error, offset, pattern);
92 return yield;
93 }
94
95
96
97
98 /*************************************************
99 * Execute regular expression and set strings *
100 *************************************************/
101
102 /* This function runs a regular expression match, and sets up the pointers to
103 the matched substrings.
104
105 Arguments:
106 re the compiled expression
107 subject the subject string
108 options additional PCRE options
109 setup if < 0 do full setup
110 if >= 0 setup from setup+1 onwards,
111 excluding the full matched string
112
113 Returns: TRUE or FALSE
114 */
115
116 BOOL
117 regex_match_and_setup(const pcre *re, uschar *subject, int options, int setup)
118 {
119 int ovector[3*(EXPAND_MAXN+1)];
120 int n = pcre_exec(re, NULL, CS subject, Ustrlen(subject), 0,
121 PCRE_EOPT | options, ovector, sizeof(ovector)/sizeof(int));
122 BOOL yield = n >= 0;
123 if (n == 0) n = EXPAND_MAXN + 1;
124 if (yield)
125 {
126 int nn;
127 expand_nmax = (setup < 0)? 0 : setup + 1;
128 for (nn = (setup < 0)? 0 : 2; nn < n*2; nn += 2)
129 {
130 expand_nstring[expand_nmax] = subject + ovector[nn];
131 expand_nlength[expand_nmax++] = ovector[nn+1] - ovector[nn];
132 }
133 expand_nmax--;
134 }
135 return yield;
136 }
137
138
139
140
141 /*************************************************
142 * Handler for SIGUSR1 *
143 *************************************************/
144
145 /* SIGUSR1 causes any exim process to write to the process log details of
146 what it is currently doing. It will only be used if the OS is capable of
147 setting up a handler that causes automatic restarting of any system call
148 that is in progress at the time.
149
150 Argument: the signal number (SIGUSR1)
151 Returns: nothing
152 */
153
154 static void
155 usr1_handler(int sig)
156 {
157 sig = sig; /* Keep picky compilers happy */
158 log_write(0, LOG_PROCESS, "%s", process_info);
159 log_close_all();
160 os_restarting_signal(SIGUSR1, usr1_handler);
161 }
162
163
164
165 /*************************************************
166 * Timeout handler *
167 *************************************************/
168
169 /* This handler is enabled most of the time that Exim is running. The handler
170 doesn't actually get used unless alarm() has been called to set a timer, to
171 place a time limit on a system call of some kind. When the handler is run, it
172 re-enables itself.
173
174 There are some other SIGALRM handlers that are used in special cases when more
175 than just a flag setting is required; for example, when reading a message's
176 input. These are normally set up in the code module that uses them, and the
177 SIGALRM handler is reset to this one afterwards.
178
179 Argument: the signal value (SIGALRM)
180 Returns: nothing
181 */
182
183 void
184 sigalrm_handler(int sig)
185 {
186 sig = sig; /* Keep picky compilers happy */
187 sigalrm_seen = TRUE;
188 os_non_restarting_signal(SIGALRM, sigalrm_handler);
189 }
190
191
192
193 /*************************************************
194 * Sleep for a fractional time interval *
195 *************************************************/
196
197 /* This function is called by millisleep() and exim_wait_tick() to wait for a
198 period of time that may include a fraction of a second. The coding is somewhat
199 tedious. We do not expect setitimer() ever to fail, but if it does, the process
200 will wait for ever, so we panic in this instance. (There was a case of this
201 when a bug in a function that calls milliwait() caused it to pass invalid data.
202 That's when I added the check. :-)
203
204 Argument: an itimerval structure containing the interval
205 Returns: nothing
206 */
207
208 static void
209 milliwait(struct itimerval *itval)
210 {
211 sigset_t sigmask;
212 sigset_t old_sigmask;
213 (void)sigemptyset(&sigmask); /* Empty mask */
214 (void)sigaddset(&sigmask, SIGALRM); /* Add SIGALRM */
215 (void)sigprocmask(SIG_BLOCK, &sigmask, &old_sigmask); /* Block SIGALRM */
216 if (setitimer(ITIMER_REAL, itval, NULL) < 0) /* Start timer */
217 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
218 "setitimer() failed: %s", strerror(errno));
219 (void)sigfillset(&sigmask); /* All signals */
220 (void)sigdelset(&sigmask, SIGALRM); /* Remove SIGALRM */
221 (void)sigsuspend(&sigmask); /* Until SIGALRM */
222 (void)sigprocmask(SIG_SETMASK, &old_sigmask, NULL); /* Restore mask */
223 }
224
225
226
227
228 /*************************************************
229 * Millisecond sleep function *
230 *************************************************/
231
232 /* The basic sleep() function has a granularity of 1 second, which is too rough
233 in some cases - for example, when using an increasing delay to slow down
234 spammers.
235
236 Argument: number of millseconds
237 Returns: nothing
238 */
239
240 void
241 millisleep(int msec)
242 {
243 struct itimerval itval;
244 itval.it_interval.tv_sec = 0;
245 itval.it_interval.tv_usec = 0;
246 itval.it_value.tv_sec = msec/1000;
247 itval.it_value.tv_usec = (msec % 1000) * 1000;
248 milliwait(&itval);
249 }
250
251
252
253 /*************************************************
254 * Compare microsecond times *
255 *************************************************/
256
257 /*
258 Arguments:
259 tv1 the first time
260 tv2 the second time
261
262 Returns: -1, 0, or +1
263 */
264
265 int
266 exim_tvcmp(struct timeval *t1, struct timeval *t2)
267 {
268 if (t1->tv_sec > t2->tv_sec) return +1;
269 if (t1->tv_sec < t2->tv_sec) return -1;
270 if (t1->tv_usec > t2->tv_usec) return +1;
271 if (t1->tv_usec < t2->tv_usec) return -1;
272 return 0;
273 }
274
275
276
277
278 /*************************************************
279 * Clock tick wait function *
280 *************************************************/
281
282 /* Exim uses a time + a pid to generate a unique identifier in two places: its
283 message IDs, and in file names for maildir deliveries. Because some OS now
284 re-use pids within the same second, sub-second times are now being used.
285 However, for absolute certaintly, we must ensure the clock has ticked before
286 allowing the relevant process to complete. At the time of implementation of
287 this code (February 2003), the speed of processors is such that the clock will
288 invariably have ticked already by the time a process has done its job. This
289 function prepares for the time when things are faster - and it also copes with
290 clocks that go backwards.
291
292 Arguments:
293 then_tv A timeval which was used to create uniqueness; its usec field
294 has been rounded down to the value of the resolution.
295 We want to be sure the current time is greater than this.
296 resolution The resolution that was used to divide the microseconds
297 (1 for maildir, larger for message ids)
298
299 Returns: nothing
300 */
301
302 void
303 exim_wait_tick(struct timeval *then_tv, int resolution)
304 {
305 struct timeval now_tv;
306 long int now_true_usec;
307
308 (void)gettimeofday(&now_tv, NULL);
309 now_true_usec = now_tv.tv_usec;
310 now_tv.tv_usec = (now_true_usec/resolution) * resolution;
311
312 if (exim_tvcmp(&now_tv, then_tv) <= 0)
313 {
314 struct itimerval itval;
315 itval.it_interval.tv_sec = 0;
316 itval.it_interval.tv_usec = 0;
317 itval.it_value.tv_sec = then_tv->tv_sec - now_tv.tv_sec;
318 itval.it_value.tv_usec = then_tv->tv_usec + resolution - now_true_usec;
319
320 /* We know that, overall, "now" is less than or equal to "then". Therefore, a
321 negative value for the microseconds is possible only in the case when "now"
322 is more than a second less than "then". That means that itval.it_value.tv_sec
323 is greater than zero. The following correction is therefore safe. */
324
325 if (itval.it_value.tv_usec < 0)
326 {
327 itval.it_value.tv_usec += 1000000;
328 itval.it_value.tv_sec -= 1;
329 }
330
331 DEBUG(D_transport|D_receive)
332 {
333 if (!running_in_test_harness)
334 {
335 debug_printf("tick check: %lu.%06lu %lu.%06lu\n",
336 then_tv->tv_sec, then_tv->tv_usec, now_tv.tv_sec, now_tv.tv_usec);
337 debug_printf("waiting %lu.%06lu\n", itval.it_value.tv_sec,
338 itval.it_value.tv_usec);
339 }
340 }
341
342 milliwait(&itval);
343 }
344 }
345
346
347
348
349 /*************************************************
350 * Set up processing details *
351 *************************************************/
352
353 /* Save a text string for dumping when SIGUSR1 is received.
354 Do checks for overruns.
355
356 Arguments: format and arguments, as for printf()
357 Returns: nothing
358 */
359
360 void
361 set_process_info(char *format, ...)
362 {
363 int len;
364 va_list ap;
365 sprintf(CS process_info, "%5d ", (int)getpid());
366 len = Ustrlen(process_info);
367 va_start(ap, format);
368 if (!string_vformat(process_info + len, PROCESS_INFO_SIZE - len, format, ap))
369 Ustrcpy(process_info + len, "**** string overflowed buffer ****");
370 DEBUG(D_process_info) debug_printf("set_process_info: %s\n", process_info);
371 va_end(ap);
372 }
373
374
375
376
377
378 /*************************************************
379 * Call fopen() with umask 777 and adjust mode *
380 *************************************************/
381
382 /* Exim runs with umask(0) so that files created with open() have the mode that
383 is specified in the open() call. However, there are some files, typically in
384 the spool directory, that are created with fopen(). They end up world-writeable
385 if no precautions are taken. Although the spool directory is not accessible to
386 the world, this is an untidiness. So this is a wrapper function for fopen()
387 that sorts out the mode of the created file.
388
389 Arguments:
390 filename the file name
391 options the fopen() options
392 mode the required mode
393
394 Returns: the fopened FILE or NULL
395 */
396
397 FILE *
398 modefopen(uschar *filename, char *options, mode_t mode)
399 {
400 mode_t saved_umask = umask(0777);
401 FILE *f = Ufopen(filename, options);
402 (void)umask(saved_umask);
403 if (f != NULL) (void)fchmod(fileno(f), mode);
404 return f;
405 }
406
407
408
409
410 /*************************************************
411 * Ensure stdin, stdout, and stderr exist *
412 *************************************************/
413
414 /* Some operating systems grumble if an exec() happens without a standard
415 input, output, and error (fds 0, 1, 2) being defined. The worry is that some
416 file will be opened and will use these fd values, and then some other bit of
417 code will assume, for example, that it can write error messages to stderr.
418 This function ensures that fds 0, 1, and 2 are open if they do not already
419 exist, by connecting them to /dev/null.
420
421 This function is also used to ensure that std{in,out,err} exist at all times,
422 so that if any library that Exim calls tries to use them, it doesn't crash.
423
424 Arguments: None
425 Returns: Nothing
426 */
427
428 void
429 exim_nullstd(void)
430 {
431 int i;
432 int devnull = -1;
433 struct stat statbuf;
434 for (i = 0; i <= 2; i++)
435 {
436 if (fstat(i, &statbuf) < 0 && errno == EBADF)
437 {
438 if (devnull < 0) devnull = open("/dev/null", O_RDWR);
439 if (devnull < 0) log_write(0, LOG_MAIN|LOG_PANIC_DIE, "%s",
440 string_open_failed(errno, "/dev/null"));
441 if (devnull != i) (void)dup2(devnull, i);
442 }
443 }
444 if (devnull > 2) (void)close(devnull);
445 }
446
447
448
449
450 /*************************************************
451 * Close unwanted file descriptors for delivery *
452 *************************************************/
453
454 /* This function is called from a new process that has been forked to deliver
455 an incoming message, either directly, or using exec.
456
457 We want any smtp input streams to be closed in this new process. However, it
458 has been observed that using fclose() here causes trouble. When reading in -bS
459 input, duplicate copies of messages have been seen. The files will be sharing a
460 file pointer with the parent process, and it seems that fclose() (at least on
461 some systems - I saw this on Solaris 2.5.1) messes with that file pointer, at
462 least sometimes. Hence we go for closing the underlying file descriptors.
463
464 If TLS is active, we want to shut down the TLS library, but without molesting
465 the parent's SSL connection.
466
467 For delivery of a non-SMTP message, we want to close stdin and stdout (and
468 stderr unless debugging) because the calling process might have set them up as
469 pipes and be waiting for them to close before it waits for the submission
470 process to terminate. If they aren't closed, they hold up the calling process
471 until the initial delivery process finishes, which is not what we want.
472
473 Exception: We do want it for synchronous delivery!
474
475 And notwithstanding all the above, if D_resolver is set, implying resolver
476 debugging, leave stdout open, because that's where the resolver writes its
477 debugging output.
478
479 When we close stderr (which implies we've also closed stdout), we also get rid
480 of any controlling terminal.
481
482 Arguments: None
483 Returns: Nothing
484 */
485
486 static void
487 close_unwanted(void)
488 {
489 if (smtp_input)
490 {
491 #ifdef SUPPORT_TLS
492 tls_close(FALSE); /* Shut down the TLS library */
493 #endif
494 (void)close(fileno(smtp_in));
495 (void)close(fileno(smtp_out));
496 smtp_in = NULL;
497 }
498 else
499 {
500 (void)close(0); /* stdin */
501 if ((debug_selector & D_resolver) == 0) (void)close(1); /* stdout */
502 if (debug_selector == 0) /* stderr */
503 {
504 if (!synchronous_delivery)
505 {
506 (void)close(2);
507 log_stderr = NULL;
508 }
509 (void)setsid();
510 }
511 }
512 }
513
514
515
516
517 /*************************************************
518 * Set uid and gid *
519 *************************************************/
520
521 /* This function sets a new uid and gid permanently, optionally calling
522 initgroups() to set auxiliary groups. There are some special cases when running
523 Exim in unprivileged modes. In these situations the effective uid will not be
524 root; if we already have the right effective uid/gid, and don't need to
525 initialize any groups, leave things as they are.
526
527 Arguments:
528 uid the uid
529 gid the gid
530 igflag TRUE if initgroups() wanted
531 msg text to use in debugging output and failure log
532
533 Returns: nothing; bombs out on failure
534 */
535
536 void
537 exim_setugid(uid_t uid, gid_t gid, BOOL igflag, uschar *msg)
538 {
539 uid_t euid = geteuid();
540 gid_t egid = getegid();
541
542 if (euid == root_uid || euid != uid || egid != gid || igflag)
543 {
544 /* At least one OS returns +1 for initgroups failure, so just check for
545 non-zero. */
546
547 if (igflag)
548 {
549 struct passwd *pw = getpwuid(uid);
550 if (pw != NULL)
551 {
552 if (initgroups(pw->pw_name, gid) != 0)
553 log_write(0,LOG_MAIN|LOG_PANIC_DIE,"initgroups failed for uid=%ld: %s",
554 (long int)uid, strerror(errno));
555 }
556 else log_write(0, LOG_MAIN|LOG_PANIC_DIE, "cannot run initgroups(): "
557 "no passwd entry for uid=%ld", (long int)uid);
558 }
559
560 if (setgid(gid) < 0 || setuid(uid) < 0)
561 {
562 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "unable to set gid=%ld or uid=%ld "
563 "(euid=%ld): %s", (long int)gid, (long int)uid, (long int)euid, msg);
564 }
565 }
566
567 /* Debugging output included uid/gid and all groups */
568
569 DEBUG(D_uid)
570 {
571 int group_count;
572 gid_t group_list[NGROUPS_MAX];
573 debug_printf("changed uid/gid: %s\n uid=%ld gid=%ld pid=%ld\n", msg,
574 (long int)geteuid(), (long int)getegid(), (long int)getpid());
575 group_count = getgroups(NGROUPS_MAX, group_list);
576 debug_printf(" auxiliary group list:");
577 if (group_count > 0)
578 {
579 int i;
580 for (i = 0; i < group_count; i++) debug_printf(" %d", (int)group_list[i]);
581 }
582 else debug_printf(" <none>");
583 debug_printf("\n");
584 }
585 }
586
587
588
589
590 /*************************************************
591 * Exit point *
592 *************************************************/
593
594 /* Exim exits via this function so that it always clears up any open
595 databases.
596
597 Arguments:
598 rc return code
599
600 Returns: does not return
601 */
602
603 void
604 exim_exit(int rc)
605 {
606 search_tidyup();
607 DEBUG(D_any)
608 debug_printf(">>>>>>>>>>>>>>>> Exim pid=%d terminating with rc=%d "
609 ">>>>>>>>>>>>>>>>\n", (int)getpid(), rc);
610 exit(rc);
611 }
612
613
614
615
616 /*************************************************
617 * Extract port from host address *
618 *************************************************/
619
620 /* Called to extract the port from the values given to -oMa and -oMi.
621 It also checks the syntax of the address, and terminates it before the
622 port data when a port is extracted.
623
624 Argument:
625 address the address, with possible port on the end
626
627 Returns: the port, or zero if there isn't one
628 bombs out on a syntax error
629 */
630
631 static int
632 check_port(uschar *address)
633 {
634 int port = host_address_extract_port(address);
635 if (string_is_ip_address(address, NULL) == 0)
636 {
637 fprintf(stderr, "exim abandoned: \"%s\" is not an IP address\n", address);
638 exit(EXIT_FAILURE);
639 }
640 return port;
641 }
642
643
644
645 /*************************************************
646 * Test/verify an address *
647 *************************************************/
648
649 /* This function is called by the -bv and -bt code. It extracts a working
650 address from a full RFC 822 address. This isn't really necessary per se, but it
651 has the effect of collapsing source routes.
652
653 Arguments:
654 s the address string
655 flags flag bits for verify_address()
656 exit_value to be set for failures
657
658 Returns: nothing
659 */
660
661 static void
662 test_address(uschar *s, int flags, int *exit_value)
663 {
664 int start, end, domain;
665 uschar *parse_error = NULL;
666 uschar *address = parse_extract_address(s, &parse_error, &start, &end, &domain,
667 FALSE);
668 if (address == NULL)
669 {
670 fprintf(stdout, "syntax error: %s\n", parse_error);
671 *exit_value = 2;
672 }
673 else
674 {
675 int rc = verify_address(deliver_make_addr(address,TRUE), stdout, flags, -1,
676 -1, -1, NULL, NULL, NULL);
677 if (rc == FAIL) *exit_value = 2;
678 else if (rc == DEFER && *exit_value == 0) *exit_value = 1;
679 }
680 }
681
682
683
684 /*************************************************
685 * Decode bit settings for log/debug *
686 *************************************************/
687
688 /* This function decodes a string containing bit settings in the form of +name
689 and/or -name sequences, and sets/unsets bits in a bit string accordingly. It
690 also recognizes a numeric setting of the form =<number>, but this is not
691 intended for user use. It's an easy way for Exim to pass the debug settings
692 when it is re-exec'ed.
693
694 The log options are held in two unsigned ints (because there became too many
695 for one). The top bit in the table means "put in 2nd selector". This does not
696 yet apply to debug options, so the "=" facility sets only the first selector.
697
698 The "all" selector, which must be equal to 0xffffffff, is recognized specially.
699 It sets all the bits in both selectors. However, there is a facility for then
700 unsetting certain bits, because we want to turn off "memory" in the debug case.
701
702 A bad value for a debug setting is treated as an unknown option - error message
703 to stderr and die. For log settings, which come from the configuration file,
704 we write to the log on the way out...
705
706 Arguments:
707 selector1 address of the first bit string
708 selector2 address of the second bit string, or NULL
709 notall1 bits to exclude from "all" for selector1
710 notall2 bits to exclude from "all" for selector2
711 string the configured string
712 options the table of option names
713 count size of table
714 which "log" or "debug"
715
716 Returns: nothing on success - bomb out on failure
717 */
718
719 static void
720 decode_bits(unsigned int *selector1, unsigned int *selector2, int notall1,
721 int notall2, uschar *string, bit_table *options, int count, uschar *which)
722 {
723 uschar *errmsg;
724 if (string == NULL) return;
725
726 if (*string == '=')
727 {
728 char *end; /* Not uschar */
729 *selector1 = strtoul(CS string+1, &end, 0);
730 if (*end == 0) return;
731 errmsg = string_sprintf("malformed numeric %s_selector setting: %s", which,
732 string);
733 goto ERROR_RETURN;
734 }
735
736 /* Handle symbolic setting */
737
738 else for(;;)
739 {
740 BOOL adding;
741 uschar *s;
742 int len;
743 bit_table *start, *end;
744
745 while (isspace(*string)) string++;
746 if (*string == 0) return;
747
748 if (*string != '+' && *string != '-')
749 {
750 errmsg = string_sprintf("malformed %s_selector setting: "
751 "+ or - expected but found \"%s\"", which, string);
752 goto ERROR_RETURN;
753 }
754
755 adding = *string++ == '+';
756 s = string;
757 while (isalnum(*string) || *string == '_') string++;
758 len = string - s;
759
760 start = options;
761 end = options + count;
762
763 while (start < end)
764 {
765 bit_table *middle = start + (end - start)/2;
766 int c = Ustrncmp(s, middle->name, len);
767 if (c == 0)
768 {
769 if (middle->name[len] != 0) c = -1; else
770 {
771 unsigned int bit = middle->bit;
772 unsigned int *selector;
773
774 /* The value with all bits set means "force all bits in both selectors"
775 in the case where two are being handled. However, the top bit in the
776 second selector is never set. When setting, some bits can be excluded.
777 */
778
779 if (bit == 0xffffffff)
780 {
781 if (adding)
782 {
783 *selector1 = 0xffffffff ^ notall1;
784 if (selector2 != NULL) *selector2 = 0x7fffffff ^ notall2;
785 }
786 else
787 {
788 *selector1 = 0;
789 if (selector2 != NULL) *selector2 = 0;
790 }
791 }
792
793 /* Otherwise, the 0x80000000 bit means "this value, without the top
794 bit, belongs in the second selector". */
795
796 else
797 {
798 if ((bit & 0x80000000) != 0)
799 {
800 selector = selector2;
801 bit &= 0x7fffffff;
802 }
803 else selector = selector1;
804 if (adding) *selector |= bit; else *selector &= ~bit;
805 }
806 break; /* Out of loop to match selector name */
807 }
808 }
809 if (c < 0) end = middle; else start = middle + 1;
810 } /* Loop to match selector name */
811
812 if (start >= end)
813 {
814 errmsg = string_sprintf("unknown %s_selector setting: %c%.*s", which,
815 adding? '+' : '-', len, s);
816 goto ERROR_RETURN;
817 }
818 } /* Loop for selector names */
819
820 /* Handle disasters */
821
822 ERROR_RETURN:
823 if (Ustrcmp(which, "debug") == 0)
824 {
825 fprintf(stderr, "exim: %s\n", errmsg);
826 exit(EXIT_FAILURE);
827 }
828 else log_write(0, LOG_CONFIG|LOG_PANIC_DIE, "%s", errmsg);
829 }
830
831
832
833 /*************************************************
834 * Show supported features *
835 *************************************************/
836
837 /* This function is called for -bV and for -d to output the optional features
838 of the current Exim binary.
839
840 Arguments: a FILE for printing
841 Returns: nothing
842 */
843
844 static void
845 show_whats_supported(FILE *f)
846 {
847 #ifdef DB_VERSION_STRING
848 fprintf(f, "Berkeley DB: %s\n", DB_VERSION_STRING);
849 #elif defined(BTREEVERSION) && defined(HASHVERSION)
850 #ifdef USE_DB
851 fprintf(f, "Probably Berkeley DB version 1.8x (native mode)\n");
852 #else
853 fprintf(f, "Probably Berkeley DB version 1.8x (compatibility mode)\n");
854 #endif
855 #elif defined(_DBM_RDONLY) || defined(dbm_dirfno)
856 fprintf(f, "Probably ndbm\n");
857 #elif defined(USE_TDB)
858 fprintf(f, "Using tdb\n");
859 #else
860 #ifdef USE_GDBM
861 fprintf(f, "Probably GDBM (native mode)\n");
862 #else
863 fprintf(f, "Probably GDBM (compatibility mode)\n");
864 #endif
865 #endif
866
867 fprintf(f, "Support for:");
868 #ifdef SUPPORT_CRYPTEQ
869 fprintf(f, " crypteq");
870 #endif
871 #if HAVE_ICONV
872 fprintf(f, " iconv()");
873 #endif
874 #if HAVE_IPV6
875 fprintf(f, " IPv6");
876 #endif
877 #ifdef HAVE_LOGIN_CAP
878 fprintf(f, " use_classresources");
879 #endif
880 #ifdef SUPPORT_PAM
881 fprintf(f, " PAM");
882 #endif
883 #ifdef EXIM_PERL
884 fprintf(f, " Perl");
885 #endif
886 #ifdef EXPAND_DLFUNC
887 fprintf(f, " Expand_dlfunc");
888 #endif
889 #ifdef USE_TCP_WRAPPERS
890 fprintf(f, " TCPwrappers");
891 #endif
892 #ifdef SUPPORT_TLS
893 #ifdef USE_GNUTLS
894 fprintf(f, " GnuTLS");
895 #else
896 fprintf(f, " OpenSSL");
897 #endif
898 #endif
899 #ifdef SUPPORT_TRANSLATE_IP_ADDRESS
900 fprintf(f, " translate_ip_address");
901 #endif
902 #ifdef SUPPORT_MOVE_FROZEN_MESSAGES
903 fprintf(f, " move_frozen_messages");
904 #endif
905 #ifdef WITH_CONTENT_SCAN
906 fprintf(f, " Content_Scanning");
907 #endif
908 #ifdef WITH_OLD_DEMIME
909 fprintf(f, " Old_Demime");
910 #endif
911 #ifdef EXPERIMENTAL_SPF
912 fprintf(f, " Experimental_SPF");
913 #endif
914 #ifdef EXPERIMENTAL_SRS
915 fprintf(f, " Experimental_SRS");
916 #endif
917 #ifdef EXPERIMENTAL_BRIGHTMAIL
918 fprintf(f, " Experimental_Brightmail");
919 #endif
920 #ifdef EXPERIMENTAL_DOMAINKEYS
921 fprintf(f, " Experimental_DomainKeys");
922 #endif
923 fprintf(f, "\n");
924
925 fprintf(f, "Lookups:");
926 #ifdef LOOKUP_LSEARCH
927 fprintf(f, " lsearch wildlsearch nwildlsearch iplsearch");
928 #endif
929 #ifdef LOOKUP_CDB
930 fprintf(f, " cdb");
931 #endif
932 #ifdef LOOKUP_DBM
933 fprintf(f, " dbm dbmnz");
934 #endif
935 #ifdef LOOKUP_DNSDB
936 fprintf(f, " dnsdb");
937 #endif
938 #ifdef LOOKUP_DSEARCH
939 fprintf(f, " dsearch");
940 #endif
941 #ifdef LOOKUP_IBASE
942 fprintf(f, " ibase");
943 #endif
944 #ifdef LOOKUP_LDAP
945 fprintf(f, " ldap ldapdn ldapm");
946 #endif
947 #ifdef LOOKUP_MYSQL
948 fprintf(f, " mysql");
949 #endif
950 #ifdef LOOKUP_NIS
951 fprintf(f, " nis nis0");
952 #endif
953 #ifdef LOOKUP_NISPLUS
954 fprintf(f, " nisplus");
955 #endif
956 #ifdef LOOKUP_ORACLE
957 fprintf(f, " oracle");
958 #endif
959 #ifdef LOOKUP_PASSWD
960 fprintf(f, " passwd");
961 #endif
962 #ifdef LOOKUP_PGSQL
963 fprintf(f, " pgsql");
964 #endif
965 #ifdef LOOKUP_SQLITE
966 fprintf(f, " sqlite");
967 #endif
968 #ifdef LOOKUP_TESTDB
969 fprintf(f, " testdb");
970 #endif
971 #ifdef LOOKUP_WHOSON
972 fprintf(f, " whoson");
973 #endif
974 fprintf(f, "\n");
975
976 fprintf(f, "Authenticators:");
977 #ifdef AUTH_CRAM_MD5
978 fprintf(f, " cram_md5");
979 #endif
980 #ifdef AUTH_CYRUS_SASL
981 fprintf(f, " cyrus_sasl");
982 #endif
983 #ifdef AUTH_PLAINTEXT
984 fprintf(f, " plaintext");
985 #endif
986 #ifdef AUTH_SPA
987 fprintf(f, " spa");
988 #endif
989 fprintf(f, "\n");
990
991 fprintf(f, "Routers:");
992 #ifdef ROUTER_ACCEPT
993 fprintf(f, " accept");
994 #endif
995 #ifdef ROUTER_DNSLOOKUP
996 fprintf(f, " dnslookup");
997 #endif
998 #ifdef ROUTER_IPLITERAL
999 fprintf(f, " ipliteral");
1000 #endif
1001 #ifdef ROUTER_IPLOOKUP
1002 fprintf(f, " iplookup");
1003 #endif
1004 #ifdef ROUTER_MANUALROUTE
1005 fprintf(f, " manualroute");
1006 #endif
1007 #ifdef ROUTER_QUERYPROGRAM
1008 fprintf(f, " queryprogram");
1009 #endif
1010 #ifdef ROUTER_REDIRECT
1011 fprintf(f, " redirect");
1012 #endif
1013 fprintf(f, "\n");
1014
1015 fprintf(f, "Transports:");
1016 #ifdef TRANSPORT_APPENDFILE
1017 fprintf(f, " appendfile");
1018 #ifdef SUPPORT_MAILDIR
1019 fprintf(f, "/maildir");
1020 #endif
1021 #ifdef SUPPORT_MAILSTORE
1022 fprintf(f, "/mailstore");
1023 #endif
1024 #ifdef SUPPORT_MBX
1025 fprintf(f, "/mbx");
1026 #endif
1027 #endif
1028 #ifdef TRANSPORT_AUTOREPLY
1029 fprintf(f, " autoreply");
1030 #endif
1031 #ifdef TRANSPORT_LMTP
1032 fprintf(f, " lmtp");
1033 #endif
1034 #ifdef TRANSPORT_PIPE
1035 fprintf(f, " pipe");
1036 #endif
1037 #ifdef TRANSPORT_SMTP
1038 fprintf(f, " smtp");
1039 #endif
1040 fprintf(f, "\n");
1041
1042 if (fixed_never_users[0] > 0)
1043 {
1044 int i;
1045 fprintf(f, "Fixed never_users: ");
1046 for (i = 1; i <= (int)fixed_never_users[0] - 1; i++)
1047 fprintf(f, "%d:", (unsigned int)fixed_never_users[i]);
1048 fprintf(f, "%d\n", (unsigned int)fixed_never_users[i]);
1049 }
1050
1051 fprintf(f, "Size of off_t: %d\n", sizeof(off_t));
1052 }
1053
1054
1055
1056
1057 /*************************************************
1058 * Quote a local part *
1059 *************************************************/
1060
1061 /* This function is used when a sender address or a From: or Sender: header
1062 line is being created from the caller's login, or from an authenticated_id. It
1063 applies appropriate quoting rules for a local part.
1064
1065 Argument: the local part
1066 Returns: the local part, quoted if necessary
1067 */
1068
1069 uschar *
1070 local_part_quote(uschar *lpart)
1071 {
1072 BOOL needs_quote = FALSE;
1073 int size, ptr;
1074 uschar *yield;
1075 uschar *t;
1076
1077 for (t = lpart; !needs_quote && *t != 0; t++)
1078 {
1079 needs_quote = !isalnum(*t) && strchr("!#$%&'*+-/=?^_`{|}~", *t) == NULL &&
1080 (*t != '.' || t == lpart || t[1] == 0);
1081 }
1082
1083 if (!needs_quote) return lpart;
1084
1085 size = ptr = 0;
1086 yield = string_cat(NULL, &size, &ptr, US"\"", 1);
1087
1088 for (;;)
1089 {
1090 uschar *nq = US Ustrpbrk(lpart, "\\\"");
1091 if (nq == NULL)
1092 {
1093 yield = string_cat(yield, &size, &ptr, lpart, Ustrlen(lpart));
1094 break;
1095 }
1096 yield = string_cat(yield, &size, &ptr, lpart, nq - lpart);
1097 yield = string_cat(yield, &size, &ptr, US"\\", 1);
1098 yield = string_cat(yield, &size, &ptr, nq, 1);
1099 lpart = nq + 1;
1100 }
1101
1102 yield = string_cat(yield, &size, &ptr, US"\"", 1);
1103 yield[ptr] = 0;
1104 return yield;
1105 }
1106
1107
1108
1109 #ifdef USE_READLINE
1110 /*************************************************
1111 * Load readline() functions *
1112 *************************************************/
1113
1114 /* This function is called from testing executions that read data from stdin,
1115 but only when running as the calling user. Currently, only -be does this. The
1116 function loads the readline() function library and passes back the functions.
1117 On some systems, it needs the curses library, so load that too, but try without
1118 it if loading fails. All this functionality has to be requested at build time.
1119
1120 Arguments:
1121 fn_readline_ptr pointer to where to put the readline pointer
1122 fn_addhist_ptr pointer to where to put the addhistory function
1123
1124 Returns: the dlopen handle or NULL on failure
1125 */
1126
1127 static void *
1128 set_readline(char * (**fn_readline_ptr)(char *),
1129 char * (**fn_addhist_ptr)(char *))
1130 {
1131 void *dlhandle;
1132 void *dlhandle_curses = dlopen("libcurses.so", RTLD_GLOBAL|RTLD_LAZY);
1133
1134 dlhandle = dlopen("libreadline.so", RTLD_GLOBAL|RTLD_NOW);
1135 if (dlhandle_curses != NULL) dlclose(dlhandle_curses);
1136
1137 if (dlhandle != NULL)
1138 {
1139 *fn_readline_ptr = (char *(*)(char*))dlsym(dlhandle, "readline");
1140 *fn_addhist_ptr = (char *(*)(char*))dlsym(dlhandle, "add_history");
1141 }
1142 else
1143 {
1144 DEBUG(D_any) debug_printf("failed to load readline: %s\n", dlerror());
1145 }
1146
1147 return dlhandle;
1148 }
1149 #endif
1150
1151
1152
1153 /*************************************************
1154 * Get a line from stdin for testing things *
1155 *************************************************/
1156
1157 /* This function is called when running tests that can take a number of lines
1158 of input (for example, -be and -bt). It handles continuations and trailing
1159 spaces. And prompting and a blank line output on eof. If readline() is in use,
1160 the arguments are non-NULL and provide the relevant functions.
1161
1162 Arguments:
1163 fn_readline readline function or NULL
1164 fn_addhist addhist function or NULL
1165
1166 Returns: pointer to dynamic memory, or NULL at end of file
1167 */
1168
1169 static uschar *
1170 get_stdinput(char *(*fn_readline)(char *), char *(*fn_addhist)(char *))
1171 {
1172 int i;
1173 int size = 0;
1174 int ptr = 0;
1175 uschar *yield = NULL;
1176
1177 if (fn_readline == NULL) printf("> ");
1178
1179 for (i = 0;; i++)
1180 {
1181 uschar buffer[1024];
1182 uschar *p, *ss;
1183
1184 #ifdef USE_READLINE
1185 char *readline_line = NULL;
1186 if (fn_readline != NULL)
1187 {
1188 if ((readline_line = fn_readline((i > 0)? "":"> ")) == NULL) break;
1189 if (*readline_line != 0 && fn_addhist != NULL) fn_addhist(readline_line);
1190 p = US readline_line;
1191 }
1192 else
1193 #endif
1194
1195 /* readline() not in use */
1196
1197 {
1198 if (Ufgets(buffer, sizeof(buffer), stdin) == NULL) break;
1199 p = buffer;
1200 }
1201
1202 /* Handle the line */
1203
1204 ss = p + (int)Ustrlen(p);
1205 while (ss > p && isspace(ss[-1])) ss--;
1206
1207 if (i > 0)
1208 {
1209 while (p < ss && isspace(*p)) p++; /* leading space after cont */
1210 }
1211
1212 yield = string_cat(yield, &size, &ptr, p, ss - p);
1213
1214 #ifdef USE_READLINE
1215 if (fn_readline != NULL) free(readline_line);
1216 #endif
1217
1218 if (ss == p || yield[ptr-1] != '\\')
1219 {
1220 yield[ptr] = 0;
1221 break;
1222 }
1223 yield[--ptr] = 0;
1224 }
1225
1226 if (yield == NULL) printf("\n");
1227 return yield;
1228 }
1229
1230
1231
1232 /*************************************************
1233 * Entry point and high-level code *
1234 *************************************************/
1235
1236 /* Entry point for the Exim mailer. Analyse the arguments and arrange to take
1237 the appropriate action. All the necessary functions are present in the one
1238 binary. I originally thought one should split it up, but it turns out that so
1239 much of the apparatus is needed in each chunk that one might as well just have
1240 it all available all the time, which then makes the coding easier as well.
1241
1242 Arguments:
1243 argc count of entries in argv
1244 argv argument strings, with argv[0] being the program name
1245
1246 Returns: EXIT_SUCCESS if terminated successfully
1247 EXIT_FAILURE otherwise, except when a message has been sent
1248 to the sender, and -oee was given
1249 */
1250
1251 int
1252 main(int argc, char **cargv)
1253 {
1254 uschar **argv = USS cargv;
1255 int arg_receive_timeout = -1;
1256 int arg_smtp_receive_timeout = -1;
1257 int arg_error_handling = error_handling;
1258 int filter_sfd = -1;
1259 int filter_ufd = -1;
1260 int group_count;
1261 int i;
1262 int list_queue_option = 0;
1263 int msg_action = 0;
1264 int msg_action_arg = -1;
1265 int namelen = (argv[0] == NULL)? 0 : Ustrlen(argv[0]);
1266 int queue_only_reason = 0;
1267 #ifdef EXIM_PERL
1268 int perl_start_option = 0;
1269 #endif
1270 int recipients_arg = argc;
1271 int sender_address_domain = 0;
1272 int test_retry_arg = -1;
1273 int test_rewrite_arg = -1;
1274 BOOL arg_queue_only = FALSE;
1275 BOOL bi_option = FALSE;
1276 BOOL checking = FALSE;
1277 BOOL count_queue = FALSE;
1278 BOOL expansion_test = FALSE;
1279 BOOL extract_recipients = FALSE;
1280 BOOL forced_delivery = FALSE;
1281 BOOL f_end_dot = FALSE;
1282 BOOL deliver_give_up = FALSE;
1283 BOOL list_queue = FALSE;
1284 BOOL list_options = FALSE;
1285 BOOL local_queue_only;
1286 BOOL more = TRUE;
1287 BOOL one_msg_action = FALSE;
1288 BOOL queue_only_set = FALSE;
1289 BOOL receiving_message = TRUE;
1290 BOOL unprivileged;
1291 BOOL removed_privilege = FALSE;
1292 BOOL verify_address_mode = FALSE;
1293 BOOL verify_as_sender = FALSE;
1294 BOOL version_printed = FALSE;
1295 uschar *alias_arg = NULL;
1296 uschar *called_as = US"";
1297 uschar *start_queue_run_id = NULL;
1298 uschar *stop_queue_run_id = NULL;
1299 uschar *ftest_domain = NULL;
1300 uschar *ftest_localpart = NULL;
1301 uschar *ftest_prefix = NULL;
1302 uschar *ftest_suffix = NULL;
1303 uschar *real_sender_address;
1304 uschar *originator_home = US"/";
1305 void *reset_point;
1306
1307 struct passwd *pw;
1308 struct stat statbuf;
1309 pid_t passed_qr_pid = (pid_t)0;
1310 int passed_qr_pipe = -1;
1311 gid_t group_list[NGROUPS_MAX];
1312
1313 /* Possible options for -R and -S */
1314
1315 static uschar *rsopts[] = { US"f", US"ff", US"r", US"rf", US"rff" };
1316
1317 /* Need to define this in case we need to change the environment in order
1318 to get rid of a bogus time zone. We have to make it char rather than uschar
1319 because some OS define it in /usr/include/unistd.h. */
1320
1321 extern char **environ;
1322
1323 /* If the Exim user and/or group and/or the configuration file owner/group were
1324 defined by ref:name at build time, we must now find the actual uid/gid values.
1325 This is a feature to make the lives of binary distributors easier. */
1326
1327 #ifdef EXIM_USERNAME
1328 if (route_finduser(US EXIM_USERNAME, &pw, &exim_uid))
1329 {
1330 exim_gid = pw->pw_gid;
1331 }
1332 else
1333 {
1334 fprintf(stderr, "exim: failed to find uid for user name \"%s\"\n",
1335 EXIM_USERNAME);
1336 exit(EXIT_FAILURE);
1337 }
1338 #endif
1339
1340 #ifdef EXIM_GROUPNAME
1341 if (!route_findgroup(US EXIM_GROUPNAME, &exim_gid))
1342 {
1343 fprintf(stderr, "exim: failed to find gid for group name \"%s\"\n",
1344 EXIM_GROUPNAME);
1345 exit(EXIT_FAILURE);
1346 }
1347 #endif
1348
1349 #ifdef CONFIGURE_OWNERNAME
1350 if (!route_finduser(US CONFIGURE_OWNERNAME, NULL, &config_uid))
1351 {
1352 fprintf(stderr, "exim: failed to find uid for user name \"%s\"\n",
1353 CONFIGURE_OWNERNAME);
1354 exit(EXIT_FAILURE);
1355 }
1356 #endif
1357
1358 #ifdef CONFIGURE_GROUPNAME
1359 if (!route_findgroup(US CONFIGURE_GROUPNAME, &config_gid))
1360 {
1361 fprintf(stderr, "exim: failed to find gid for group name \"%s\"\n",
1362 CONFIGURE_GROUPNAME);
1363 exit(EXIT_FAILURE);
1364 }
1365 #endif
1366
1367 /* In the Cygwin environment, some initialization needs doing. It is fudged
1368 in by means of this macro. */
1369
1370 #ifdef OS_INIT
1371 OS_INIT
1372 #endif
1373
1374 /* Check a field which is patched when we are running Exim within its
1375 testing harness; do a fast initial check, and then the whole thing. */
1376
1377 running_in_test_harness =
1378 *running_status == '<' && Ustrcmp(running_status, "<<<testing>>>") == 0;
1379
1380 /* The C standard says that the equivalent of setlocale(LC_ALL, "C") is obeyed
1381 at the start of a program; however, it seems that some environments do not
1382 follow this. A "strange" locale can affect the formatting of timestamps, so we
1383 make quite sure. */
1384
1385 setlocale(LC_ALL, "C");
1386
1387 /* Set up the default handler for timing using alarm(). */
1388
1389 os_non_restarting_signal(SIGALRM, sigalrm_handler);
1390
1391 /* Ensure we have a buffer for constructing log entries. Use malloc directly,
1392 because store_malloc writes a log entry on failure. */
1393
1394 log_buffer = (uschar *)malloc(LOG_BUFFER_SIZE);
1395 if (log_buffer == NULL)
1396 {
1397 fprintf(stderr, "exim: failed to get store for log buffer\n");
1398 exit(EXIT_FAILURE);
1399 }
1400
1401 /* Set log_stderr to stderr, provided that stderr exists. This gets reset to
1402 NULL when the daemon is run and the file is closed. We have to use this
1403 indirection, because some systems don't allow writing to the variable "stderr".
1404 */
1405
1406 if (fstat(fileno(stderr), &statbuf) >= 0) log_stderr = stderr;
1407
1408 /* Arrange for the PCRE regex library to use our store functions. Note that
1409 the normal calls are actually macros that add additional arguments for
1410 debugging purposes so we have to assign specially constructed functions here.
1411 The default is to use store in the stacking pool, but this is overridden in the
1412 regex_must_compile() function. */
1413
1414 pcre_malloc = function_store_get;
1415 pcre_free = function_dummy_free;
1416
1417 /* Ensure there is a big buffer for temporary use in several places. It is put
1418 in malloc store so that it can be freed for enlargement if necessary. */
1419
1420 big_buffer = store_malloc(big_buffer_size);
1421
1422 /* Set up the handler for the data request signal, and set the initial
1423 descriptive text. */
1424
1425 set_process_info("initializing");
1426 os_restarting_signal(SIGUSR1, usr1_handler);
1427
1428 /* SIGHUP is used to get the daemon to reconfigure. It gets set as appropriate
1429 in the daemon code. For the rest of Exim's uses, we ignore it. */
1430
1431 signal(SIGHUP, SIG_IGN);
1432
1433 /* We don't want to die on pipe errors as the code is written to handle
1434 the write error instead. */
1435
1436 signal(SIGPIPE, SIG_IGN);
1437
1438 /* Under some circumstance on some OS, Exim can get called with SIGCHLD
1439 set to SIG_IGN. This causes subprocesses that complete before the parent
1440 process waits for them not to hang around, so when Exim calls wait(), nothing
1441 is there. The wait() code has been made robust against this, but let's ensure
1442 that SIGCHLD is set to SIG_DFL, because it's tidier to wait and get a process
1443 ending status. We use sigaction rather than plain signal() on those OS where
1444 SA_NOCLDWAIT exists, because we want to be sure it is turned off. (There was a
1445 problem on AIX with this.) */
1446
1447 #ifdef SA_NOCLDWAIT
1448 {
1449 struct sigaction act;
1450 act.sa_handler = SIG_DFL;
1451 sigemptyset(&(act.sa_mask));
1452 act.sa_flags = 0;
1453 sigaction(SIGCHLD, &act, NULL);
1454 }
1455 #else
1456 signal(SIGCHLD, SIG_DFL);
1457 #endif
1458
1459 /* Save the arguments for use if we re-exec exim as a daemon after receiving
1460 SIGHUP. */
1461
1462 sighup_argv = argv;
1463
1464 /* Set up the version number. Set up the leading 'E' for the external form of
1465 message ids, set the pointer to the internal form, and initialize it to
1466 indicate no message being processed. */
1467
1468 version_init();
1469 message_id_option[0] = '-';
1470 message_id_external = message_id_option + 1;
1471 message_id_external[0] = 'E';
1472 message_id = message_id_external + 1;
1473 message_id[0] = 0;
1474
1475 /* Set the umask to zero so that any files Exim creates using open() are
1476 created with the modes that it specifies. NOTE: Files created with fopen() have
1477 a problem, which was not recognized till rather late (February 2006). With this
1478 umask, such files will be world writeable. (They are all content scanning files
1479 in the spool directory, which isn't world-accessible, so this is not a
1480 disaster, but it's untidy.) I don't want to change this overall setting,
1481 however, because it will interact badly with the open() calls. Instead, there's
1482 now a function called modefopen() that fiddles with the umask while calling
1483 fopen(). */
1484
1485 (void)umask(0);
1486
1487 /* Precompile the regular expression for matching a message id. Keep this in
1488 step with the code that generates ids in the accept.c module. We need to do
1489 this here, because the -M options check their arguments for syntactic validity
1490 using mac_ismsgid, which uses this. */
1491
1492 regex_ismsgid =
1493 regex_must_compile(US"^(?:[^\\W_]{6}-){2}[^\\W_]{2}$", FALSE, TRUE);
1494
1495 /* If the program is called as "mailq" treat it as equivalent to "exim -bp";
1496 this seems to be a generally accepted convention, since one finds symbolic
1497 links called "mailq" in standard OS configurations. */
1498
1499 if ((namelen == 5 && Ustrcmp(argv[0], "mailq") == 0) ||
1500 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/mailq", 6) == 0))
1501 {
1502 list_queue = TRUE;
1503 receiving_message = FALSE;
1504 called_as = US"-mailq";
1505 }
1506
1507 /* If the program is called as "rmail" treat it as equivalent to
1508 "exim -i -oee", thus allowing UUCP messages to be input using non-SMTP mode,
1509 i.e. preventing a single dot on a line from terminating the message, and
1510 returning with zero return code, even in cases of error (provided an error
1511 message has been sent). */
1512
1513 if ((namelen == 5 && Ustrcmp(argv[0], "rmail") == 0) ||
1514 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/rmail", 6) == 0))
1515 {
1516 dot_ends = FALSE;
1517 called_as = US"-rmail";
1518 errors_sender_rc = EXIT_SUCCESS;
1519 }
1520
1521 /* If the program is called as "rsmtp" treat it as equivalent to "exim -bS";
1522 this is a smail convention. */
1523
1524 if ((namelen == 5 && Ustrcmp(argv[0], "rsmtp") == 0) ||
1525 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/rsmtp", 6) == 0))
1526 {
1527 smtp_input = smtp_batched_input = TRUE;
1528 called_as = US"-rsmtp";
1529 }
1530
1531 /* If the program is called as "runq" treat it as equivalent to "exim -q";
1532 this is a smail convention. */
1533
1534 if ((namelen == 4 && Ustrcmp(argv[0], "runq") == 0) ||
1535 (namelen > 4 && Ustrncmp(argv[0] + namelen - 5, "/runq", 5) == 0))
1536 {
1537 queue_interval = 0;
1538 receiving_message = FALSE;
1539 called_as = US"-runq";
1540 }
1541
1542 /* If the program is called as "newaliases" treat it as equivalent to
1543 "exim -bi"; this is a sendmail convention. */
1544
1545 if ((namelen == 10 && Ustrcmp(argv[0], "newaliases") == 0) ||
1546 (namelen > 10 && Ustrncmp(argv[0] + namelen - 11, "/newaliases", 11) == 0))
1547 {
1548 bi_option = TRUE;
1549 receiving_message = FALSE;
1550 called_as = US"-newaliases";
1551 }
1552
1553 /* Save the original effective uid for a couple of uses later. It should
1554 normally be root, but in some esoteric environments it may not be. */
1555
1556 original_euid = geteuid();
1557
1558 /* Get the real uid and gid. If the caller is root, force the effective uid/gid
1559 to be the same as the real ones. This makes a difference only if Exim is setuid
1560 (or setgid) to something other than root, which could be the case in some
1561 special configurations. */
1562
1563 real_uid = getuid();
1564 real_gid = getgid();
1565
1566 if (real_uid == root_uid)
1567 {
1568 setgid(real_gid);
1569 setuid(real_uid);
1570 }
1571
1572 /* If neither the original real uid nor the original euid was root, Exim is
1573 running in an unprivileged state. */
1574
1575 unprivileged = (real_uid != root_uid && original_euid != root_uid);
1576
1577 /* If the first argument is --help, pretend there are no arguments. This will
1578 cause a brief message to be given. */
1579
1580 if (argc > 1 && Ustrcmp(argv[1], "--help") == 0) argc = 1;
1581
1582 /* Scan the program's arguments. Some can be dealt with right away; others are
1583 simply recorded for checking and handling afterwards. Do a high-level switch
1584 on the second character (the one after '-'), to save some effort. */
1585
1586 for (i = 1; i < argc; i++)
1587 {
1588 BOOL badarg = FALSE;
1589 uschar *arg = argv[i];
1590 uschar *argrest;
1591 int switchchar;
1592
1593 /* An argument not starting with '-' is the start of a recipients list;
1594 break out of the options-scanning loop. */
1595
1596 if (arg[0] != '-')
1597 {
1598 recipients_arg = i;
1599 break;
1600 }
1601
1602 /* An option consistion of -- terminates the options */
1603
1604 if (Ustrcmp(arg, "--") == 0)
1605 {
1606 recipients_arg = i + 1;
1607 break;
1608 }
1609
1610 /* Handle flagged options */
1611
1612 switchchar = arg[1];
1613 argrest = arg+2;
1614
1615 /* Make all -ex options synonymous with -oex arguments, since that
1616 is assumed by various callers. Also make -qR options synonymous with -R
1617 options, as that seems to be required as well. Allow for -qqR too, and
1618 the same for -S options. */
1619
1620 if (Ustrncmp(arg+1, "oe", 2) == 0 ||
1621 Ustrncmp(arg+1, "qR", 2) == 0 ||
1622 Ustrncmp(arg+1, "qS", 2) == 0)
1623 {
1624 switchchar = arg[2];
1625 argrest++;
1626 }
1627 else if (Ustrncmp(arg+1, "qqR", 3) == 0 || Ustrncmp(arg+1, "qqS", 3) == 0)
1628 {
1629 switchchar = arg[3];
1630 argrest += 2;
1631 queue_2stage = TRUE;
1632 }
1633
1634 /* Make -r synonymous with -f, since it is a documented alias */
1635
1636 else if (arg[1] == 'r') switchchar = 'f';
1637
1638 /* Make -ov synonymous with -v */
1639
1640 else if (Ustrcmp(arg, "-ov") == 0)
1641 {
1642 switchchar = 'v';
1643 argrest++;
1644 }
1645
1646 /* High-level switch on active initial letter */
1647
1648 switch(switchchar)
1649 {
1650 /* -Btype is a sendmail option for 7bit/8bit setting. Exim is 8-bit clean
1651 so has no need of it. */
1652
1653 case 'B':
1654 if (*argrest == 0) i++; /* Skip over the type */
1655 break;
1656
1657
1658 case 'b':
1659 receiving_message = FALSE; /* Reset TRUE for -bm, -bS, -bs below */
1660
1661 /* -bd: Run in daemon mode, awaiting SMTP connections.
1662 -bdf: Ditto, but in the foreground.
1663 */
1664
1665 if (*argrest == 'd')
1666 {
1667 daemon_listen = TRUE;
1668 if (*(++argrest) == 'f') background_daemon = FALSE;
1669 else if (*argrest != 0) { badarg = TRUE; break; }
1670 }
1671
1672 /* -be: Run in expansion test mode */
1673
1674 else if (*argrest == 'e')
1675 expansion_test = checking = TRUE;
1676
1677 /* -bF: Run system filter test */
1678
1679 else if (*argrest == 'F')
1680 {
1681 filter_test |= FTEST_SYSTEM;
1682 if (*(++argrest) != 0) { badarg = TRUE; break; }
1683 if (++i < argc) filter_test_sfile = argv[i]; else
1684 {
1685 fprintf(stderr, "exim: file name expected after %s\n", argv[i-1]);
1686 exit(EXIT_FAILURE);
1687 }
1688 }
1689
1690 /* -bf: Run user filter test
1691 -bfd: Set domain for filter testing
1692 -bfl: Set local part for filter testing
1693 -bfp: Set prefix for filter testing
1694 -bfs: Set suffix for filter testing
1695 */
1696
1697 else if (*argrest == 'f')
1698 {
1699 if (*(++argrest) == 0)
1700 {
1701 filter_test |= FTEST_USER;
1702 if (++i < argc) filter_test_ufile = argv[i]; else
1703 {
1704 fprintf(stderr, "exim: file name expected after %s\n", argv[i-1]);
1705 exit(EXIT_FAILURE);
1706 }
1707 }
1708 else
1709 {
1710 if (++i >= argc)
1711 {
1712 fprintf(stderr, "exim: string expected after %s\n", arg);
1713 exit(EXIT_FAILURE);
1714 }
1715 if (Ustrcmp(argrest, "d") == 0) ftest_domain = argv[i];
1716 else if (Ustrcmp(argrest, "l") == 0) ftest_localpart = argv[i];
1717 else if (Ustrcmp(argrest, "p") == 0) ftest_prefix = argv[i];
1718 else if (Ustrcmp(argrest, "s") == 0) ftest_suffix = argv[i];
1719 else { badarg = TRUE; break; }
1720 }
1721 }
1722
1723 /* -bh: Host checking - an IP address must follow. */
1724
1725 else if (Ustrcmp(argrest, "h") == 0 || Ustrcmp(argrest, "hc") == 0)
1726 {
1727 if (++i >= argc) { badarg = TRUE; break; }
1728 sender_host_address = argv[i];
1729 host_checking = checking = log_testing_mode = TRUE;
1730 host_checking_callout = argrest[1] == 'c';
1731 }
1732
1733 /* -bi: This option is used by sendmail to initialize *the* alias file,
1734 though it has the -oA option to specify a different file. Exim has no
1735 concept of *the* alias file, but since Sun's YP make script calls
1736 sendmail this way, some support must be provided. */
1737
1738 else if (Ustrcmp(argrest, "i") == 0) bi_option = TRUE;
1739
1740 /* -bm: Accept and deliver message - the default option. Reinstate
1741 receiving_message, which got turned off for all -b options. */
1742
1743 else if (Ustrcmp(argrest, "m") == 0) receiving_message = TRUE;
1744
1745 /* -bnq: For locally originating messages, do not qualify unqualified
1746 addresses. In the envelope, this causes errors; in header lines they
1747 just get left. */
1748
1749 else if (Ustrcmp(argrest, "nq") == 0)
1750 {
1751 allow_unqualified_sender = FALSE;
1752 allow_unqualified_recipient = FALSE;
1753 }
1754
1755 /* -bpxx: List the contents of the mail queue, in various forms. If
1756 the option is -bpc, just a queue count is needed. Otherwise, if the
1757 first letter after p is r, then order is random. */
1758
1759 else if (*argrest == 'p')
1760 {
1761 if (*(++argrest) == 'c')
1762 {
1763 count_queue = TRUE;
1764 if (*(++argrest) != 0) badarg = TRUE;
1765 break;
1766 }
1767
1768 if (*argrest == 'r')
1769 {
1770 list_queue_option = 8;
1771 argrest++;
1772 }
1773 else list_queue_option = 0;
1774
1775 list_queue = TRUE;
1776
1777 /* -bp: List the contents of the mail queue, top-level only */
1778
1779 if (*argrest == 0) {}
1780
1781 /* -bpu: List the contents of the mail queue, top-level undelivered */
1782
1783 else if (Ustrcmp(argrest, "u") == 0) list_queue_option += 1;
1784
1785 /* -bpa: List the contents of the mail queue, including all delivered */
1786
1787 else if (Ustrcmp(argrest, "a") == 0) list_queue_option += 2;
1788
1789 /* Unknown after -bp[r] */
1790
1791 else
1792 {
1793 badarg = TRUE;
1794 break;
1795 }
1796 }
1797
1798
1799 /* -bP: List the configuration variables given as the address list.
1800 Force -v, so configuration errors get displayed. */
1801
1802 else if (Ustrcmp(argrest, "P") == 0)
1803 {
1804 list_options = TRUE;
1805 debug_selector |= D_v;
1806 debug_file = stderr;
1807 }
1808
1809 /* -brt: Test retry configuration lookup */
1810
1811 else if (Ustrcmp(argrest, "rt") == 0)
1812 {
1813 test_retry_arg = i + 1;
1814 goto END_ARG;
1815 }
1816
1817 /* -brw: Test rewrite configuration */
1818
1819 else if (Ustrcmp(argrest, "rw") == 0)
1820 {
1821 test_rewrite_arg = i + 1;
1822 goto END_ARG;
1823 }
1824
1825 /* -bS: Read SMTP commands on standard input, but produce no replies -
1826 all errors are reported by sending messages. */
1827
1828 else if (Ustrcmp(argrest, "S") == 0)
1829 smtp_input = smtp_batched_input = receiving_message = TRUE;
1830
1831 /* -bs: Read SMTP commands on standard input and produce SMTP replies
1832 on standard output. */
1833
1834 else if (Ustrcmp(argrest, "s") == 0) smtp_input = receiving_message = TRUE;
1835
1836 /* -bt: address testing mode */
1837
1838 else if (Ustrcmp(argrest, "t") == 0)
1839 address_test_mode = checking = log_testing_mode = TRUE;
1840
1841 /* -bv: verify addresses */
1842
1843 else if (Ustrcmp(argrest, "v") == 0)
1844 verify_address_mode = checking = log_testing_mode = TRUE;
1845
1846 /* -bvs: verify sender addresses */
1847
1848 else if (Ustrcmp(argrest, "vs") == 0)
1849 {
1850 verify_address_mode = checking = log_testing_mode = TRUE;
1851 verify_as_sender = TRUE;
1852 }
1853
1854 /* -bV: Print version string and support details */
1855
1856 else if (Ustrcmp(argrest, "V") == 0)
1857 {
1858 printf("Exim version %s #%s built %s\n", version_string,
1859 version_cnumber, version_date);
1860 printf("%s\n", CS version_copyright);
1861 version_printed = TRUE;
1862 show_whats_supported(stdout);
1863 }
1864
1865 else badarg = TRUE;
1866 break;
1867
1868
1869 /* -C: change configuration file list; ignore if it isn't really
1870 a change! Enforce a prefix check if required. */
1871
1872 case 'C':
1873 if (*argrest == 0)
1874 {
1875 if(++i < argc) argrest = argv[i]; else
1876 { badarg = TRUE; break; }
1877 }
1878 if (Ustrcmp(config_main_filelist, argrest) != 0)
1879 {
1880 #ifdef ALT_CONFIG_PREFIX
1881 int sep = 0;
1882 int len = Ustrlen(ALT_CONFIG_PREFIX);
1883 uschar *list = argrest;
1884 uschar *filename;
1885 while((filename = string_nextinlist(&list, &sep, big_buffer,
1886 big_buffer_size)) != NULL)
1887 {
1888 if ((Ustrlen(filename) < len ||
1889 Ustrncmp(filename, ALT_CONFIG_PREFIX, len) != 0 ||
1890 Ustrstr(filename, "/../") != NULL) &&
1891 (Ustrcmp(filename, "/dev/null") != 0 || real_uid != root_uid))
1892 {
1893 fprintf(stderr, "-C Permission denied\n");
1894 exit(EXIT_FAILURE);
1895 }
1896 }
1897 #endif
1898
1899 config_main_filelist = argrest;
1900 config_changed = TRUE;
1901 }
1902 break;
1903
1904
1905 /* -D: set up a macro definition */
1906
1907 case 'D':
1908 #ifdef DISABLE_D_OPTION
1909 fprintf(stderr, "exim: -D is not available in this Exim binary\n");
1910 exit(EXIT_FAILURE);
1911 #else
1912 {
1913 int ptr = 0;
1914 macro_item *mlast = NULL;
1915 macro_item *m;
1916 uschar name[24];
1917 uschar *s = argrest;
1918
1919 while (isspace(*s)) s++;
1920
1921 if (*s < 'A' || *s > 'Z')
1922 {
1923 fprintf(stderr, "exim: macro name set by -D must start with "
1924 "an upper case letter\n");
1925 exit(EXIT_FAILURE);
1926 }
1927
1928 while (isalnum(*s) || *s == '_')
1929 {
1930 if (ptr < sizeof(name)-1) name[ptr++] = *s;
1931 s++;
1932 }
1933 name[ptr] = 0;
1934 if (ptr == 0) { badarg = TRUE; break; }
1935 while (isspace(*s)) s++;
1936 if (*s != 0)
1937 {
1938 if (*s++ != '=') { badarg = TRUE; break; }
1939 while (isspace(*s)) s++;
1940 }
1941
1942 for (m = macros; m != NULL; m = m->next)
1943 {
1944 if (Ustrcmp(m->name, name) == 0)
1945 {
1946 fprintf(stderr, "exim: duplicated -D in command line\n");
1947 exit(EXIT_FAILURE);
1948 }
1949 mlast = m;
1950 }
1951
1952 m = store_get(sizeof(macro_item) + Ustrlen(name));
1953 m->next = NULL;
1954 m->command_line = TRUE;
1955 if (mlast == NULL) macros = m; else mlast->next = m;
1956 Ustrcpy(m->name, name);
1957 m->replacement = string_copy(s);
1958
1959 if (clmacro_count >= MAX_CLMACROS)
1960 {
1961 fprintf(stderr, "exim: too many -D options on command line\n");
1962 exit(EXIT_FAILURE);
1963 }
1964 clmacros[clmacro_count++] = string_sprintf("-D%s=%s", m->name,
1965 m->replacement);
1966 }
1967 #endif
1968 break;
1969
1970 /* -d: Set debug level (see also -v below) or set the drop_cr option.
1971 The latter is now a no-op, retained for compatibility only. If -dd is used,
1972 debugging subprocesses of the daemon is disabled. */
1973
1974 case 'd':
1975 if (Ustrcmp(argrest, "ropcr") == 0)
1976 {
1977 /* drop_cr = TRUE; */
1978 }
1979
1980 /* Use an intermediate variable so that we don't set debugging while
1981 decoding the debugging bits. */
1982
1983 else
1984 {
1985 unsigned int selector = D_default;
1986 debug_selector = 0;
1987 debug_file = NULL;
1988 if (*argrest == 'd')
1989 {
1990 debug_daemon = TRUE;
1991 argrest++;
1992 }
1993 if (*argrest != 0)
1994 decode_bits(&selector, NULL, D_memory, 0, argrest, debug_options,
1995 debug_options_count, US"debug");
1996 debug_selector = selector;
1997 }
1998 break;
1999
2000
2001 /* -E: This is a local error message. This option is not intended for
2002 external use at all, but is not restricted to trusted callers because it
2003 does no harm (just suppresses certain error messages) and if Exim is run
2004 not setuid root it won't always be trusted when it generates error
2005 messages using this option. If there is a message id following -E, point
2006 message_reference at it, for logging. */
2007
2008 case 'E':
2009 local_error_message = TRUE;
2010 if (mac_ismsgid(argrest)) message_reference = argrest;
2011 break;
2012
2013
2014 /* -ex: The vacation program calls sendmail with the undocumented "-eq"
2015 option, so it looks as if historically the -oex options are also callable
2016 without the leading -o. So we have to accept them. Before the switch,
2017 anything starting -oe has been converted to -e. Exim does not support all
2018 of the sendmail error options. */
2019
2020 case 'e':
2021 if (Ustrcmp(argrest, "e") == 0)
2022 {
2023 arg_error_handling = ERRORS_SENDER;
2024 errors_sender_rc = EXIT_SUCCESS;
2025 }
2026 else if (Ustrcmp(argrest, "m") == 0) arg_error_handling = ERRORS_SENDER;
2027 else if (Ustrcmp(argrest, "p") == 0) arg_error_handling = ERRORS_STDERR;
2028 else if (Ustrcmp(argrest, "q") == 0) arg_error_handling = ERRORS_STDERR;
2029 else if (Ustrcmp(argrest, "w") == 0) arg_error_handling = ERRORS_SENDER;
2030 else badarg = TRUE;
2031 break;
2032
2033
2034 /* -F: Set sender's full name, used instead of the gecos entry from
2035 the password file. Since users can usually alter their gecos entries,
2036 there's no security involved in using this instead. The data can follow
2037 the -F or be in the next argument. */
2038
2039 case 'F':
2040 if (*argrest == 0)
2041 {
2042 if(++i < argc) argrest = argv[i]; else
2043 { badarg = TRUE; break; }
2044 }
2045 originator_name = argrest;
2046 sender_name_forced = TRUE;
2047 break;
2048
2049
2050 /* -f: Set sender's address - this value is only actually used if Exim is
2051 run by a trusted user, or if untrusted_set_sender is set and matches the
2052 address, except that the null address can always be set by any user. The
2053 test for this happens later, when the value given here is ignored when not
2054 permitted. For an untrusted user, the actual sender is still put in Sender:
2055 if it doesn't match the From: header (unless no_local_from_check is set).
2056 The data can follow the -f or be in the next argument. The -r switch is an
2057 obsolete form of -f but since there appear to be programs out there that
2058 use anything that sendmail has ever supported, better accept it - the
2059 synonymizing is done before the switch above.
2060
2061 At this stage, we must allow domain literal addresses, because we don't
2062 know what the setting of allow_domain_literals is yet. Ditto for trailing
2063 dots and strip_trailing_dot. */
2064
2065 case 'f':
2066 {
2067 int start, end;
2068 uschar *errmess;
2069 if (*argrest == 0)
2070 {
2071 if (i+1 < argc) argrest = argv[++i]; else
2072 { badarg = TRUE; break; }
2073 }
2074 if (*argrest == 0)
2075 {
2076 sender_address = string_sprintf(""); /* Ensure writeable memory */
2077 }
2078 else
2079 {
2080 uschar *temp = argrest + Ustrlen(argrest) - 1;
2081 while (temp >= argrest && isspace(*temp)) temp--;
2082 if (temp >= argrest && *temp == '.') f_end_dot = TRUE;
2083 allow_domain_literals = TRUE;
2084 strip_trailing_dot = TRUE;
2085 sender_address = parse_extract_address(argrest, &errmess, &start, &end,
2086 &sender_address_domain, TRUE);
2087 allow_domain_literals = FALSE;
2088 strip_trailing_dot = FALSE;
2089 if (sender_address == NULL)
2090 {
2091 fprintf(stderr, "exim: bad -f address \"%s\": %s\n", argrest, errmess);
2092 return EXIT_FAILURE;
2093 }
2094 }
2095 sender_address_forced = TRUE;
2096 }
2097 break;
2098
2099 /* This is some Sendmail thing which can be ignored */
2100
2101 case 'G':
2102 break;
2103
2104 /* -h: Set the hop count for an incoming message. Exim does not currently
2105 support this; it always computes it by counting the Received: headers.
2106 To put it in will require a change to the spool header file format. */
2107
2108 case 'h':
2109 if (*argrest == 0)
2110 {
2111 if(++i < argc) argrest = argv[i]; else
2112 { badarg = TRUE; break; }
2113 }
2114 if (!isdigit(*argrest)) badarg = TRUE;
2115 break;
2116
2117
2118 /* -i: Set flag so dot doesn't end non-SMTP input (same as -oi, seems
2119 not to be documented for sendmail but mailx (at least) uses it) */
2120
2121 case 'i':
2122 if (*argrest == 0) dot_ends = FALSE; else badarg = TRUE;
2123 break;
2124
2125
2126 case 'M':
2127 receiving_message = FALSE;
2128
2129 /* -MC: continue delivery of another message via an existing open
2130 file descriptor. This option is used for an internal call by the
2131 smtp transport when there is a pending message waiting to go to an
2132 address to which it has got a connection. Five subsequent arguments are
2133 required: transport name, host name, IP address, sequence number, and
2134 message_id. Transports may decline to create new processes if the sequence
2135 number gets too big. The channel is stdin. This (-MC) must be the last
2136 argument. There's a subsequent check that the real-uid is privileged.
2137
2138 If we are running in the test harness. delay for a bit, to let the process
2139 that set this one up complete. This makes for repeatability of the logging,
2140 etc. output. */
2141
2142 if (Ustrcmp(argrest, "C") == 0)
2143 {
2144 if (argc != i + 6)
2145 {
2146 fprintf(stderr, "exim: too many or too few arguments after -MC\n");
2147 return EXIT_FAILURE;
2148 }
2149
2150 if (msg_action_arg >= 0)
2151 {
2152 fprintf(stderr, "exim: incompatible arguments\n");
2153 return EXIT_FAILURE;
2154 }
2155
2156 continue_transport = argv[++i];
2157 continue_hostname = argv[++i];
2158 continue_host_address = argv[++i];
2159 continue_sequence = Uatoi(argv[++i]);
2160 msg_action = MSG_DELIVER;
2161 msg_action_arg = ++i;
2162 forced_delivery = TRUE;
2163 queue_run_pid = passed_qr_pid;
2164 queue_run_pipe = passed_qr_pipe;
2165
2166 if (!mac_ismsgid(argv[i]))
2167 {
2168 fprintf(stderr, "exim: malformed message id %s after -MC option\n",
2169 argv[i]);
2170 return EXIT_FAILURE;
2171 }
2172
2173 if (running_in_test_harness) millisleep(500);
2174 break;
2175 }
2176
2177 /* -MCA: set the smtp_authenticated flag; this is useful only when it
2178 precedes -MC (see above). The flag indicates that the host to which
2179 Exim is connected has accepted an AUTH sequence. */
2180
2181 else if (Ustrcmp(argrest, "CA") == 0)
2182 {
2183 smtp_authenticated = TRUE;
2184 break;
2185 }
2186
2187 /* -MCP: set the smtp_use_pipelining flag; this is useful only when
2188 it preceded -MC (see above) */
2189
2190 else if (Ustrcmp(argrest, "CP") == 0)
2191 {
2192 smtp_use_pipelining = TRUE;
2193 break;
2194 }
2195
2196 /* -MCQ: pass on the pid of the queue-running process that started
2197 this chain of deliveries and the fd of its synchronizing pipe; this
2198 is useful only when it precedes -MC (see above) */
2199
2200 else if (Ustrcmp(argrest, "CQ") == 0)
2201 {
2202 if(++i < argc) passed_qr_pid = (pid_t)(Uatol(argv[i]));
2203 else badarg = TRUE;
2204 if(++i < argc) passed_qr_pipe = (int)(Uatol(argv[i]));
2205 else badarg = TRUE;
2206 break;
2207 }
2208
2209 /* -MCS: set the smtp_use_size flag; this is useful only when it
2210 precedes -MC (see above) */
2211
2212 else if (Ustrcmp(argrest, "CS") == 0)
2213 {
2214 smtp_use_size = TRUE;
2215 break;
2216 }
2217
2218 /* -MCT: set the tls_offered flag; this is useful only when it
2219 precedes -MC (see above). The flag indicates that the host to which
2220 Exim is connected has offered TLS support. */
2221
2222 #ifdef SUPPORT_TLS
2223 else if (Ustrcmp(argrest, "CT") == 0)
2224 {
2225 tls_offered = TRUE;
2226 break;
2227 }
2228 #endif
2229
2230 /* -M[x]: various operations on the following list of message ids:
2231 -M deliver the messages, ignoring next retry times and thawing
2232 -Mc deliver the messages, checking next retry times, no thawing
2233 -Mf freeze the messages
2234 -Mg give up on the messages
2235 -Mt thaw the messages
2236 -Mrm remove the messages
2237 In the above cases, this must be the last option. There are also the
2238 following options which are followed by a single message id, and which
2239 act on that message. Some of them use the "recipient" addresses as well.
2240 -Mar add recipient(s)
2241 -Mmad mark all recipients delivered
2242 -Mmd mark recipients(s) delivered
2243 -Mes edit sender
2244 -Mvb show body
2245 -Mvh show header
2246 -Mvl show log
2247 */
2248
2249 else if (*argrest == 0)
2250 {
2251 msg_action = MSG_DELIVER;
2252 forced_delivery = deliver_force_thaw = TRUE;
2253 }
2254 else if (Ustrcmp(argrest, "ar") == 0)
2255 {
2256 msg_action = MSG_ADD_RECIPIENT;
2257 one_msg_action = TRUE;
2258 }
2259 else if (Ustrcmp(argrest, "c") == 0) msg_action = MSG_DELIVER;
2260 else if (Ustrcmp(argrest, "es") == 0)
2261 {
2262 msg_action = MSG_EDIT_SENDER;
2263 one_msg_action = TRUE;
2264 }
2265 else if (Ustrcmp(argrest, "f") == 0) msg_action = MSG_FREEZE;
2266 else if (Ustrcmp(argrest, "g") == 0)
2267 {
2268 msg_action = MSG_DELIVER;
2269 deliver_give_up = TRUE;
2270 }
2271 else if (Ustrcmp(argrest, "mad") == 0)
2272 {
2273 msg_action = MSG_MARK_ALL_DELIVERED;
2274 }
2275 else if (Ustrcmp(argrest, "md") == 0)
2276 {
2277 msg_action = MSG_MARK_DELIVERED;
2278 one_msg_action = TRUE;
2279 }
2280 else if (Ustrcmp(argrest, "rm") == 0) msg_action = MSG_REMOVE;
2281 else if (Ustrcmp(argrest, "t") == 0) msg_action = MSG_THAW;
2282 else if (Ustrcmp(argrest, "vb") == 0)
2283 {
2284 msg_action = MSG_SHOW_BODY;
2285 one_msg_action = TRUE;
2286 }
2287 else if (Ustrcmp(argrest, "vh") == 0)
2288 {
2289 msg_action = MSG_SHOW_HEADER;
2290 one_msg_action = TRUE;
2291 }
2292 else if (Ustrcmp(argrest, "vl") == 0)
2293 {
2294 msg_action = MSG_SHOW_LOG;
2295 one_msg_action = TRUE;
2296 }
2297 else { badarg = TRUE; break; }
2298
2299 /* All the -Mxx options require at least one message id. */
2300
2301 msg_action_arg = i + 1;
2302 if (msg_action_arg >= argc)
2303 {
2304 fprintf(stderr, "exim: no message ids given after %s option\n", arg);
2305 return EXIT_FAILURE;
2306 }
2307
2308 /* Some require only message ids to follow */
2309
2310 if (!one_msg_action)
2311 {
2312 int j;
2313 for (j = msg_action_arg; j < argc; j++) if (!mac_ismsgid(argv[j]))
2314 {
2315 fprintf(stderr, "exim: malformed message id %s after %s option\n",
2316 argv[j], arg);
2317 return EXIT_FAILURE;
2318 }
2319 goto END_ARG; /* Remaining args are ids */
2320 }
2321
2322 /* Others require only one message id, possibly followed by addresses,
2323 which will be handled as normal arguments. */
2324
2325 else
2326 {
2327 if (!mac_ismsgid(argv[msg_action_arg]))
2328 {
2329 fprintf(stderr, "exim: malformed message id %s after %s option\n",
2330 argv[msg_action_arg], arg);
2331 return EXIT_FAILURE;
2332 }
2333 i++;
2334 }
2335 break;
2336
2337
2338 /* Some programs seem to call the -om option without the leading o;
2339 for sendmail it askes for "me too". Exim always does this. */
2340
2341 case 'm':
2342 if (*argrest != 0) badarg = TRUE;
2343 break;
2344
2345
2346 /* -N: don't do delivery - a debugging option that stops transports doing
2347 their thing. It implies debugging at the D_v level. */
2348
2349 case 'N':
2350 if (*argrest == 0)
2351 {
2352 dont_deliver = TRUE;
2353 debug_selector |= D_v;
2354 debug_file = stderr;
2355 }
2356 else badarg = TRUE;
2357 break;
2358
2359
2360 /* -n: This means "don't alias" in sendmail, apparently. Just ignore
2361 it. */
2362
2363 case 'n':
2364 break;
2365
2366 /* -O: Just ignore it. In sendmail, apparently -O option=value means set
2367 option to the specified value. This form uses long names. We need to handle
2368 -O option=value and -Ooption=value. */
2369
2370 case 'O':
2371 if (*argrest == 0)
2372 {
2373 if (++i >= argc)
2374 {
2375 fprintf(stderr, "exim: string expected after -O\n");
2376 exit(EXIT_FAILURE);
2377 }
2378 }
2379 break;
2380
2381 case 'o':
2382
2383 /* -oA: Set an argument for the bi command (sendmail's "alternate alias
2384 file" option). */
2385
2386 if (*argrest == 'A')
2387 {
2388 alias_arg = argrest + 1;
2389 if (alias_arg[0] == 0)
2390 {
2391 if (i+1 < argc) alias_arg = argv[++i]; else
2392 {
2393 fprintf(stderr, "exim: string expected after -oA\n");
2394 exit(EXIT_FAILURE);
2395 }
2396 }
2397 }
2398
2399 /* -oB: Set a connection message max value for remote deliveries */
2400
2401 else if (*argrest == 'B')
2402 {
2403 uschar *p = argrest + 1;
2404 if (p[0] == 0)
2405 {
2406 if (i+1 < argc && isdigit((argv[i+1][0]))) p = argv[++i]; else
2407 {
2408 connection_max_messages = 1;
2409 p = NULL;
2410 }
2411 }
2412
2413 if (p != NULL)
2414 {
2415 if (!isdigit(*p))
2416 {
2417 fprintf(stderr, "exim: number expected after -oB\n");
2418 exit(EXIT_FAILURE);
2419 }
2420 connection_max_messages = Uatoi(p);
2421 }
2422 }
2423
2424 /* -odb: background delivery */
2425
2426 else if (Ustrcmp(argrest, "db") == 0)
2427 {
2428 synchronous_delivery = FALSE;
2429 arg_queue_only = FALSE;
2430 queue_only_set = TRUE;
2431 }
2432
2433 /* -odf: foreground delivery (smail-compatible option); same effect as
2434 -odi: interactive (synchronous) delivery (sendmail-compatible option)
2435 */
2436
2437 else if (Ustrcmp(argrest, "df") == 0 || Ustrcmp(argrest, "di") == 0)
2438 {
2439 synchronous_delivery = TRUE;
2440 arg_queue_only = FALSE;
2441 queue_only_set = TRUE;
2442 }
2443
2444 /* -odq: queue only */
2445
2446 else if (Ustrcmp(argrest, "dq") == 0)
2447 {
2448 synchronous_delivery = FALSE;
2449 arg_queue_only = TRUE;
2450 queue_only_set = TRUE;
2451 }
2452
2453 /* -odqs: queue SMTP only - do local deliveries and remote routing,
2454 but no remote delivery */
2455
2456 else if (Ustrcmp(argrest, "dqs") == 0)
2457 {
2458 queue_smtp = TRUE;
2459 arg_queue_only = FALSE;
2460 queue_only_set = TRUE;
2461 }
2462
2463 /* -oex: Sendmail error flags. As these are also accepted without the
2464 leading -o prefix, for compatibility with vacation and other callers,
2465 they are handled with -e above. */
2466
2467 /* -oi: Set flag so dot doesn't end non-SMTP input (same as -i)
2468 -oitrue: Another sendmail syntax for the same */
2469
2470 else if (Ustrcmp(argrest, "i") == 0 ||
2471 Ustrcmp(argrest, "itrue") == 0)
2472 dot_ends = FALSE;
2473
2474 /* -oM*: Set various characteristics for an incoming message; actually
2475 acted on for trusted callers only. */
2476
2477 else if (*argrest == 'M')
2478 {
2479 if (i+1 >= argc)
2480 {
2481 fprintf(stderr, "exim: data expected after -o%s\n", argrest);
2482 exit(EXIT_FAILURE);
2483 }
2484
2485 /* -oMa: Set sender host address */
2486
2487 if (Ustrcmp(argrest, "Ma") == 0) sender_host_address = argv[++i];
2488
2489 /* -oMaa: Set authenticator name */
2490
2491 else if (Ustrcmp(argrest, "Maa") == 0)
2492 sender_host_authenticated = argv[++i];
2493
2494 /* -oMas: setting authenticated sender */
2495
2496 else if (Ustrcmp(argrest, "Mas") == 0) authenticated_sender = argv[++i];
2497
2498 /* -oMai: setting authenticated id */
2499
2500 else if (Ustrcmp(argrest, "Mai") == 0) authenticated_id = argv[++i];
2501
2502 /* -oMi: Set incoming interface address */
2503
2504 else if (Ustrcmp(argrest, "Mi") == 0) interface_address = argv[++i];
2505
2506 /* -oMr: Received protocol */
2507
2508 else if (Ustrcmp(argrest, "Mr") == 0) received_protocol = argv[++i];
2509
2510 /* -oMs: Set sender host name */
2511
2512 else if (Ustrcmp(argrest, "Ms") == 0) sender_host_name = argv[++i];
2513
2514 /* -oMt: Set sender ident */
2515
2516 else if (Ustrcmp(argrest, "Mt") == 0) sender_ident = argv[++i];
2517
2518 /* Else a bad argument */
2519
2520 else
2521 {
2522 badarg = TRUE;
2523 break;
2524 }
2525 }
2526
2527 /* -om: Me-too flag for aliases. Exim always does this. Some programs
2528 seem to call this as -m (undocumented), so that is also accepted (see
2529 above). */
2530
2531 else if (Ustrcmp(argrest, "m") == 0) {}
2532
2533 /* -oo: An ancient flag for old-style addresses which still seems to
2534 crop up in some calls (see in SCO). */
2535
2536 else if (Ustrcmp(argrest, "o") == 0) {}
2537
2538 /* -oP <name>: set pid file path for daemon */
2539
2540 else if (Ustrcmp(argrest, "P") == 0)
2541 override_pid_file_path = argv[++i];
2542
2543 /* -or <n>: set timeout for non-SMTP acceptance
2544 -os <n>: set timeout for SMTP acceptance */
2545
2546 else if (*argrest == 'r' || *argrest == 's')
2547 {
2548 int *tp = (*argrest == 'r')?
2549 &arg_receive_timeout : &arg_smtp_receive_timeout;
2550 if (argrest[1] == 0)
2551 {
2552 if (i+1 < argc) *tp= readconf_readtime(argv[++i], 0, FALSE);
2553 }
2554 else *tp = readconf_readtime(argrest + 1, 0, FALSE);
2555 if (*tp < 0)
2556 {
2557 fprintf(stderr, "exim: bad time value %s: abandoned\n", argv[i]);
2558 exit(EXIT_FAILURE);
2559 }
2560 }
2561
2562 /* -oX <list>: Override local_interfaces and/or default daemon ports */
2563
2564 else if (Ustrcmp(argrest, "X") == 0)
2565 override_local_interfaces = argv[++i];
2566
2567 /* Unknown -o argument */
2568
2569 else badarg = TRUE;
2570 break;
2571
2572
2573 /* -ps: force Perl startup; -pd force delayed Perl startup */
2574
2575 case 'p':
2576 #ifdef EXIM_PERL
2577 if (*argrest == 's' && argrest[1] == 0)
2578 {
2579 perl_start_option = 1;
2580 break;
2581 }
2582 if (*argrest == 'd' && argrest[1] == 0)
2583 {
2584 perl_start_option = -1;
2585 break;
2586 }
2587 #endif
2588
2589 /* -panythingelse is taken as the Sendmail-compatible argument -prval:sval,
2590 which sets the host protocol and host name */
2591
2592 if (*argrest == 0)
2593 {
2594 if (i+1 < argc) argrest = argv[++i]; else
2595 { badarg = TRUE; break; }
2596 }
2597
2598 if (*argrest != 0)
2599 {
2600 uschar *hn = Ustrchr(argrest, ':');
2601 if (hn == NULL)
2602 {
2603 received_protocol = argrest;
2604 }
2605 else
2606 {
2607 received_protocol = string_copyn(argrest, hn - argrest);
2608 sender_host_name = hn + 1;
2609 }
2610 }
2611 break;
2612
2613
2614 case 'q':
2615 receiving_message = FALSE;
2616
2617 /* -qq...: Do queue runs in a 2-stage manner */
2618
2619 if (*argrest == 'q')
2620 {
2621 queue_2stage = TRUE;
2622 argrest++;
2623 }
2624
2625 /* -qi...: Do only first (initial) deliveries */
2626
2627 if (*argrest == 'i')
2628 {
2629 queue_run_first_delivery = TRUE;
2630 argrest++;
2631 }
2632
2633 /* -qf...: Run the queue, forcing deliveries
2634 -qff..: Ditto, forcing thawing as well */
2635
2636 if (*argrest == 'f')
2637 {
2638 queue_run_force = TRUE;
2639 if (*(++argrest) == 'f')
2640 {
2641 deliver_force_thaw = TRUE;
2642 argrest++;
2643 }
2644 }
2645
2646 /* -q[f][f]l...: Run the queue only on local deliveries */
2647
2648 if (*argrest == 'l')
2649 {
2650 queue_run_local = TRUE;
2651 argrest++;
2652 }
2653
2654 /* -q[f][f][l]: Run the queue, optionally forced, optionally local only,
2655 optionally starting from a given message id. */
2656
2657 if (*argrest == 0 &&
2658 (i + 1 >= argc || argv[i+1][0] == '-' || mac_ismsgid(argv[i+1])))
2659 {
2660 queue_interval = 0;
2661 if (i+1 < argc && mac_ismsgid(argv[i+1]))
2662 start_queue_run_id = argv[++i];
2663 if (i+1 < argc && mac_ismsgid(argv[i+1]))
2664 stop_queue_run_id = argv[++i];
2665 }
2666
2667 /* -q[f][f][l]<n>: Run the queue at regular intervals, optionally forced,
2668 optionally local only. */
2669
2670 else
2671 {
2672 if (*argrest != 0)
2673 queue_interval = readconf_readtime(argrest, 0, FALSE);
2674 else
2675 queue_interval = readconf_readtime(argv[++i], 0, FALSE);
2676 if (queue_interval <= 0)
2677 {
2678 fprintf(stderr, "exim: bad time value %s: abandoned\n", argv[i]);
2679 exit(EXIT_FAILURE);
2680 }
2681 }
2682 break;
2683
2684
2685 case 'R': /* Synonymous with -qR... */
2686 receiving_message = FALSE;
2687
2688 /* -Rf: As -R (below) but force all deliveries,
2689 -Rff: Ditto, but also thaw all frozen messages,
2690 -Rr: String is regex
2691 -Rrf: Regex and force
2692 -Rrff: Regex and force and thaw
2693
2694 in all cases provided there are no further characters in this
2695 argument. */
2696
2697 if (*argrest != 0)
2698 {
2699 int i;
2700 for (i = 0; i < sizeof(rsopts)/sizeof(uschar *); i++)
2701 {
2702 if (Ustrcmp(argrest, rsopts[i]) == 0)
2703 {
2704 if (i != 2) queue_run_force = TRUE;
2705 if (i >= 2) deliver_selectstring_regex = TRUE;
2706 if (i == 1 || i == 4) deliver_force_thaw = TRUE;
2707 argrest += Ustrlen(rsopts[i]);
2708 }
2709 }
2710 }
2711
2712 /* -R: Set string to match in addresses for forced queue run to
2713 pick out particular messages. */
2714
2715 if (*argrest == 0)
2716 {
2717 if (i+1 < argc) deliver_selectstring = argv[++i]; else
2718 {
2719 fprintf(stderr, "exim: string expected after -R\n");
2720 exit(EXIT_FAILURE);
2721 }
2722 }
2723 else deliver_selectstring = argrest;
2724 if (queue_interval < 0) queue_interval = 0;
2725 break;
2726
2727
2728 /* -r: an obsolete synonym for -f (see above) */
2729
2730
2731 /* -S: Like -R but works on sender. */
2732
2733 case 'S': /* Synonymous with -qS... */
2734 receiving_message = FALSE;
2735
2736 /* -Sf: As -S (below) but force all deliveries,
2737 -Sff: Ditto, but also thaw all frozen messages,
2738 -Sr: String is regex
2739 -Srf: Regex and force
2740 -Srff: Regex and force and thaw
2741
2742 in all cases provided there are no further characters in this
2743 argument. */
2744
2745 if (*argrest != 0)
2746 {
2747 int i;
2748 for (i = 0; i < sizeof(rsopts)/sizeof(uschar *); i++)
2749 {
2750 if (Ustrcmp(argrest, rsopts[i]) == 0)
2751 {
2752 if (i != 2) queue_run_force = TRUE;
2753 if (i >= 2) deliver_selectstring_sender_regex = TRUE;
2754 if (i == 1 || i == 4) deliver_force_thaw = TRUE;
2755 argrest += Ustrlen(rsopts[i]);
2756 }
2757 }
2758 }
2759
2760 /* -S: Set string to match in addresses for forced queue run to
2761 pick out particular messages. */
2762
2763 if (*argrest == 0)
2764 {
2765 if (i+1 < argc) deliver_selectstring_sender = argv[++i]; else
2766 {
2767 fprintf(stderr, "exim: string expected after -S\n");
2768 exit(EXIT_FAILURE);
2769 }
2770 }
2771 else deliver_selectstring_sender = argrest;
2772 if (queue_interval < 0) queue_interval = 0;
2773 break;
2774
2775 /* -Tqt is an option that is exclusively for use by the testing suite.
2776 It is not recognized in other circumstances. It allows for the setting up
2777 of explicit "queue times" so that various warning/retry things can be
2778 tested. Otherwise variability of clock ticks etc. cause problems. */
2779
2780 case 'T':
2781 if (running_in_test_harness && Ustrcmp(argrest, "qt") == 0)
2782 fudged_queue_times = argv[++i];
2783 else badarg = TRUE;
2784 break;
2785
2786
2787 /* -t: Set flag to extract recipients from body of message. */
2788
2789 case 't':
2790 if (*argrest == 0) extract_recipients = TRUE;
2791
2792 /* -ti: Set flag to extract recipients from body of message, and also
2793 specify that dot does not end the message. */
2794
2795 else if (Ustrcmp(argrest, "i") == 0)
2796 {
2797 extract_recipients = TRUE;
2798 dot_ends = FALSE;
2799 }
2800
2801 /* -tls-on-connect: don't wait for STARTTLS (for old clients) */
2802
2803 #ifdef SUPPORT_TLS
2804 else if (Ustrcmp(argrest, "ls-on-connect") == 0) tls_on_connect = TRUE;
2805 #endif
2806
2807 else badarg = TRUE;
2808 break;
2809
2810
2811 /* -U: This means "initial user submission" in sendmail, apparently. The
2812 doc claims that in future sendmail may refuse syntactically invalid
2813 messages instead of fixing them. For the moment, we just ignore it. */
2814
2815 case 'U':
2816 break;
2817
2818
2819 /* -v: verify things - this is a very low-level debugging */
2820
2821 case 'v':
2822 if (*argrest == 0)
2823 {
2824 debug_selector |= D_v;
2825 debug_file = stderr;
2826 }
2827 else badarg = TRUE;
2828 break;
2829
2830
2831 /* -x: AIX uses this to indicate some fancy 8-bit character stuff:
2832
2833 The -x flag tells the sendmail command that mail from a local
2834 mail program has National Language Support (NLS) extended characters
2835 in the body of the mail item. The sendmail command can send mail with
2836 extended NLS characters across networks that normally corrupts these
2837 8-bit characters.
2838
2839 As Exim is 8-bit clean, it just ignores this flag. */
2840
2841 case 'x':
2842 if (*argrest != 0) badarg = TRUE;
2843 break;
2844
2845 /* All other initial characters are errors */
2846
2847 default:
2848 badarg = TRUE;
2849 break;
2850 } /* End of high-level switch statement */
2851
2852 /* Failed to recognize the option, or syntax error */
2853
2854 if (badarg)
2855 {
2856 fprintf(stderr, "exim abandoned: unknown, malformed, or incomplete "
2857 "option %s\n", arg);
2858 exit(EXIT_FAILURE);
2859 }
2860 }
2861
2862
2863 /* Arguments have been processed. Check for incompatibilities. */
2864
2865 END_ARG:
2866 if ((
2867 (smtp_input || extract_recipients || recipients_arg < argc) &&
2868 (daemon_listen || queue_interval >= 0 || bi_option ||
2869 test_retry_arg >= 0 || test_rewrite_arg >= 0 ||
2870 filter_test != FTEST_NONE || (msg_action_arg > 0 && !one_msg_action))
2871 ) ||
2872 (
2873 msg_action_arg > 0 &&
2874 (daemon_listen || queue_interval >= 0 || list_options || checking ||
2875 bi_option || test_retry_arg >= 0 || test_rewrite_arg >= 0)
2876 ) ||
2877 (
2878 (daemon_listen || queue_interval >= 0) &&
2879 (sender_address != NULL || list_options || list_queue || checking ||
2880 bi_option)
2881 ) ||
2882 (
2883 daemon_listen && queue_interval == 0
2884 ) ||
2885 (
2886 list_options &&
2887 (checking || smtp_input || extract_recipients ||
2888 filter_test != FTEST_NONE || bi_option)
2889 ) ||
2890 (
2891 verify_address_mode &&
2892 (address_test_mode || smtp_input || extract_recipients ||
2893 filter_test != FTEST_NONE || bi_option)
2894 ) ||
2895 (
2896 address_test_mode && (smtp_input || extract_recipients ||
2897 filter_test != FTEST_NONE || bi_option)
2898 ) ||
2899 (
2900 smtp_input && (sender_address != NULL || filter_test != FTEST_NONE ||
2901 extract_recipients)
2902 ) ||
2903 (
2904 deliver_selectstring != NULL && queue_interval < 0
2905 )
2906 )
2907 {
2908 fprintf(stderr, "exim: incompatible command-line options or arguments\n");
2909 exit(EXIT_FAILURE);
2910 }
2911
2912 /* If debugging is set up, set the file and the file descriptor to pass on to
2913 child processes. It should, of course, be 2 for stderr. Also, force the daemon
2914 to run in the foreground. */
2915
2916 if (debug_selector != 0)
2917 {
2918 debug_file = stderr;
2919 debug_fd = fileno(debug_file);
2920 background_daemon = FALSE;
2921 if (running_in_test_harness) millisleep(100); /* lets caller finish */
2922 if (debug_selector != D_v) /* -v only doesn't show this */
2923 {
2924 debug_printf("Exim version %s uid=%ld gid=%ld pid=%d D=%x\n",
2925 version_string, (long int)real_uid, (long int)real_gid, (int)getpid(),
2926 debug_selector);
2927 show_whats_supported(stderr);
2928 }
2929 }
2930
2931 /* When started with root privilege, ensure that the limits on the number of
2932 open files and the number of processes (where that is accessible) are
2933 sufficiently large, or are unset, in case Exim has been called from an
2934 environment where the limits are screwed down. Not all OS have the ability to
2935 change some of these limits. */
2936
2937 if (unprivileged)
2938 {
2939 DEBUG(D_any) debug_print_ids(US"Exim has no root privilege:");
2940 }
2941 else
2942 {
2943 struct rlimit rlp;
2944
2945 #ifdef RLIMIT_NOFILE
2946 if (getrlimit(RLIMIT_NOFILE, &rlp) < 0)
2947 {
2948 log_write(0, LOG_MAIN|LOG_PANIC, "getrlimit(RLIMIT_NOFILE) failed: %s",
2949 strerror(errno));
2950 rlp.rlim_cur = rlp.rlim_max = 0;
2951 }
2952
2953 /* I originally chose 1000 as a nice big number that was unlikely to
2954 be exceeded. It turns out that some older OS have a fixed upper limit of
2955 256. */
2956
2957 if (rlp.rlim_cur < 1000)
2958 {
2959 rlp.rlim_cur = rlp.rlim_max = 1000;
2960 if (setrlimit(RLIMIT_NOFILE, &rlp) < 0)
2961 {
2962 rlp.rlim_cur = rlp.rlim_max = 256;
2963 if (setrlimit(RLIMIT_NOFILE, &rlp) < 0)
2964 log_write(0, LOG_MAIN|LOG_PANIC, "setrlimit(RLIMIT_NOFILE) failed: %s",
2965 strerror(errno));
2966 }
2967 }
2968 #endif
2969
2970 #ifdef RLIMIT_NPROC
2971 if (getrlimit(RLIMIT_NPROC, &rlp) < 0)
2972 {
2973 log_write(0, LOG_MAIN|LOG_PANIC, "getrlimit(RLIMIT_NPROC) failed: %s",
2974 strerror(errno));
2975 rlp.rlim_cur = rlp.rlim_max = 0;
2976 }
2977
2978 #ifdef RLIM_INFINITY
2979 if (rlp.rlim_cur != RLIM_INFINITY && rlp.rlim_cur < 1000)
2980 {
2981 rlp.rlim_cur = rlp.rlim_max = RLIM_INFINITY;
2982 #else
2983 if (rlp.rlim_cur < 1000)
2984 {
2985 rlp.rlim_cur = rlp.rlim_max = 1000;
2986 #endif
2987 if (setrlimit(RLIMIT_NPROC, &rlp) < 0)
2988 log_write(0, LOG_MAIN|LOG_PANIC, "setrlimit(RLIMIT_NPROC) failed: %s",
2989 strerror(errno));
2990 }
2991 #endif
2992 }
2993
2994 /* Exim is normally entered as root (but some special configurations are
2995 possible that don't do this). However, it always spins off sub-processes that
2996 set their uid and gid as required for local delivery. We don't want to pass on
2997 any extra groups that root may belong to, so we want to get rid of them all at
2998 this point.
2999
3000 We need to obey setgroups() at this stage, before possibly giving up root
3001 privilege for a changed configuration file, but later on we might need to
3002 check on the additional groups for the admin user privilege - can't do that
3003 till after reading the config, which might specify the exim gid. Therefore,
3004 save the group list here first. */
3005
3006 group_count = getgroups(NGROUPS_MAX, group_list);
3007
3008 /* There is a fundamental difference in some BSD systems in the matter of
3009 groups. FreeBSD and BSDI are known to be different; NetBSD and OpenBSD are
3010 known not to be different. On the "different" systems there is a single group
3011 list, and the first entry in it is the current group. On all other versions of
3012 Unix there is a supplementary group list, which is in *addition* to the current
3013 group. Consequently, to get rid of all extraneous groups on a "standard" system
3014 you pass over 0 groups to setgroups(), while on a "different" system you pass
3015 over a single group - the current group, which is always the first group in the
3016 list. Calling setgroups() with zero groups on a "different" system results in
3017 an error return. The following code should cope with both types of system.
3018
3019 However, if this process isn't running as root, setgroups() can't be used
3020 since you have to be root to run it, even if throwing away groups. Not being
3021 root here happens only in some unusual configurations. We just ignore the
3022 error. */
3023
3024 if (setgroups(0, NULL) != 0)
3025 {
3026 if (setgroups(1, group_list) != 0 && !unprivileged)
3027 {
3028 fprintf(stderr, "exim: setgroups() failed: %s\n", strerror(errno));
3029 exit(EXIT_FAILURE);
3030 }
3031 }
3032
3033 /* If the configuration file name has been altered by an argument on the
3034 command line (either a new file name or a macro definition) and the caller is
3035 not root or the exim user, or if this is a filter testing run, remove any
3036 setuid privilege the program has, and run as the underlying user.
3037
3038 If ALT_CONFIG_ROOT_ONLY is defined, the exim user is locked out of this, which
3039 severely restricts the use of -C for some purposes.
3040
3041 Otherwise, set the real ids to the effective values (should be root unless run
3042 from inetd, which it can either be root or the exim uid, if one is configured).
3043
3044 There is a private mechanism for bypassing some of this, in order to make it
3045 possible to test lots of configurations automatically, without having either to
3046 recompile each time, or to patch in an actual configuration file name and other
3047 values (such as the path name). If running in the test harness, pretend that
3048 configuration file changes and macro definitions haven't happened. */
3049
3050 if (( /* EITHER */
3051 (config_changed || macros != NULL) && /* Config changed, and */
3052 real_uid != root_uid && /* Not root, and */
3053 #ifndef ALT_CONFIG_ROOT_ONLY /* (when not locked out) */
3054 real_uid != exim_uid && /* Not exim, and */
3055 #endif
3056 !running_in_test_harness /* Not fudged */
3057 ) || /* OR */
3058 expansion_test /* expansion testing */
3059 || /* OR */
3060 filter_test != FTEST_NONE) /* Filter testing */
3061 {
3062 setgroups(group_count, group_list);
3063 exim_setugid(real_uid, real_gid, FALSE,
3064 US"-C, -D, -be or -bf forces real uid");
3065 removed_privilege = TRUE;
3066
3067 /* In the normal case when Exim is called like this, stderr is available
3068 and should be used for any logging information because attempts to write
3069 to the log will usually fail. To arrange this, we unset really_exim. However,
3070 if no stderr is available there is no point - we might as well have a go
3071 at the log (if it fails, syslog will be written). */
3072
3073 if (log_stderr != NULL) really_exim = FALSE;
3074 }
3075
3076 /* Privilege is to be retained for the moment. It may be dropped later,
3077 depending on the job that this Exim process has been asked to do. For now, set
3078 the real uid to the effective so that subsequent re-execs of Exim are done by a
3079 privileged user. */
3080
3081 else exim_setugid(geteuid(), getegid(), FALSE, US"forcing real = effective");
3082
3083 /* If testing a filter, open the file(s) now, before wasting time doing other
3084 setups and reading the message. */
3085
3086 if ((filter_test & FTEST_SYSTEM) != 0)
3087 {
3088 filter_sfd = Uopen(filter_test_sfile, O_RDONLY, 0);
3089 if (filter_sfd < 0)
3090 {
3091 fprintf(stderr, "exim: failed to open %s: %s\n", filter_test_sfile,
3092 strerror(errno));
3093 return EXIT_FAILURE;
3094 }
3095 }
3096
3097 if ((filter_test & FTEST_USER) != 0)
3098 {
3099 filter_ufd = Uopen(filter_test_ufile, O_RDONLY, 0);
3100 if (filter_ufd < 0)
3101 {
3102 fprintf(stderr, "exim: failed to open %s: %s\n", filter_test_ufile,
3103 strerror(errno));
3104 return EXIT_FAILURE;
3105 }
3106 }
3107
3108 /* Read the main runtime configuration data; this gives up if there
3109 is a failure. It leaves the configuration file open so that the subsequent
3110 configuration data for delivery can be read if needed. */
3111
3112 readconf_main();
3113
3114 /* Handle the decoding of logging options. */
3115
3116 decode_bits(&log_write_selector, &log_extra_selector, 0, 0, log_selector_string,
3117 log_options, log_options_count, US"log");
3118
3119 DEBUG(D_any)
3120 {
3121 debug_printf("configuration file is %s\n", config_main_filename);
3122 debug_printf("log selectors = %08x %08x\n", log_write_selector,
3123 log_extra_selector);
3124 }
3125
3126 /* If domain literals are not allowed, check the sender address that was
3127 supplied with -f. Ditto for a stripped trailing dot. */
3128
3129 if (sender_address != NULL)
3130 {
3131 if (sender_address[sender_address_domain] == '[' && !allow_domain_literals)
3132 {
3133 fprintf(stderr, "exim: bad -f address \"%s\": domain literals not "
3134 "allowed\n", sender_address);
3135 return EXIT_FAILURE;
3136 }
3137 if (f_end_dot && !strip_trailing_dot)
3138 {
3139 fprintf(stderr, "exim: bad -f address \"%s.\": domain is malformed "
3140 "(trailing dot not allowed)\n", sender_address);
3141 return EXIT_FAILURE;
3142 }
3143 }
3144
3145 /* Paranoia check of maximum lengths of certain strings. There is a check
3146 on the length of the log file path in log.c, which will come into effect
3147 if there are any calls to write the log earlier than this. However, if we
3148 get this far but the string is very long, it is better to stop now than to
3149 carry on and (e.g.) receive a message and then have to collapse. The call to
3150 log_write() from here will cause the ultimate panic collapse if the complete
3151 file name exceeds the buffer length. */
3152
3153 if (Ustrlen(log_file_path) > 200)
3154 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3155 "log_file_path is longer than 200 chars: aborting");
3156
3157 if (Ustrlen(pid_file_path) > 200)
3158 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3159 "pid_file_path is longer than 200 chars: aborting");
3160
3161 if (Ustrlen(spool_directory) > 200)
3162 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3163 "spool_directory is longer than 200 chars: aborting");
3164
3165 /* Length check on the process name given to syslog for its TAG field,
3166 which is only permitted to be 32 characters or less. See RFC 3164. */
3167
3168 if (Ustrlen(syslog_processname) > 32)
3169 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3170 "syslog_processname is longer than 32 chars: aborting");
3171
3172 /* In some operating systems, the environment variable TMPDIR controls where
3173 temporary files are created; Exim doesn't use these (apart from when delivering
3174 to MBX mailboxes), but called libraries such as DBM libraries may require them.
3175 If TMPDIR is found in the environment, reset it to the value defined in the
3176 TMPDIR macro, if this macro is defined. */
3177
3178 #ifdef TMPDIR
3179 {
3180 uschar **p;
3181 for (p = USS environ; *p != NULL; p++)
3182 {
3183 if (Ustrncmp(*p, "TMPDIR=", 7) == 0 &&
3184 Ustrcmp(*p+7, TMPDIR) != 0)
3185 {
3186 uschar *newp = malloc(Ustrlen(TMPDIR) + 8);
3187 sprintf(CS newp, "TMPDIR=%s", TMPDIR);
3188 *p = newp;
3189 DEBUG(D_any) debug_printf("reset TMPDIR=%s in environment\n", TMPDIR);
3190 }
3191 }
3192 }
3193 #endif
3194
3195 /* Timezone handling. If timezone_string is "utc", set a flag to cause all
3196 timestamps to be in UTC (gmtime() is used instead of localtime()). Otherwise,
3197 we may need to get rid of a bogus timezone setting. This can arise when Exim is
3198 called by a user who has set the TZ variable. This then affects the timestamps
3199 in log files and in Received: headers, and any created Date: header lines. The
3200 required timezone is settable in the configuration file, so nothing can be done
3201 about this earlier - but hopefully nothing will normally be logged earlier than
3202 this. We have to make a new environment if TZ is wrong, but don't bother if
3203 timestamps_utc is set, because then all times are in UTC anyway. */
3204
3205 if (timezone_string != NULL && strcmpic(timezone_string, US"UTC") == 0)
3206 {
3207 timestamps_utc = TRUE;
3208 }
3209 else
3210 {
3211 uschar *envtz = US getenv("TZ");
3212 if ((envtz == NULL && timezone_string != NULL) ||
3213 (envtz != NULL &&
3214 (timezone_string == NULL ||
3215 Ustrcmp(timezone_string, envtz) != 0)))
3216 {
3217 uschar **p = USS environ;
3218 uschar **new;
3219 uschar **newp;
3220 int count = 0;
3221 while (*p++ != NULL) count++;
3222 if (envtz == NULL) count++;
3223 newp = new = malloc(sizeof(uschar *) * (count + 1));
3224 for (p = USS environ; *p != NULL; p++)
3225 {
3226 if (Ustrncmp(*p, "TZ=", 3) == 0) continue;
3227 *newp++ = *p;
3228 }
3229 if (timezone_string != NULL)
3230 {
3231 *newp = malloc(Ustrlen(timezone_string) + 4);
3232 sprintf(CS *newp++, "TZ=%s", timezone_string);
3233 }
3234 *newp = NULL;
3235 environ = CSS new;
3236 tzset();
3237 DEBUG(D_any) debug_printf("Reset TZ to %s: time is %s\n", timezone_string,
3238 tod_stamp(tod_log));
3239 }
3240 }
3241
3242 /* Handle the case when we have removed the setuid privilege because of -C or
3243 -D. This means that the caller of Exim was not root, and, provided that
3244 ALT_CONFIG_ROOT_ONLY is not defined, was not the Exim user that is built into
3245 the binary.
3246
3247 If ALT_CONFIG_ROOT_ONLY is not defined, there is a problem if it turns out we
3248 were running as the exim user defined in the configuration file (different to
3249 the one in the binary). The sysadmin may expect this case to retain privilege
3250 because "the binary was called by the Exim user", but it hasn't, because of the
3251 order in which it handles this stuff. There are two possibilities:
3252
3253 (1) If deliver_drop_privilege is set, Exim is not going to re-exec in order
3254 to do message deliveries. Thus, the fact that it is running as a
3255 non-privileged user is plausible, and might be wanted in some special
3256 configurations. However, really_exim will have been set false when
3257 privilege was dropped, to stop Exim trying to write to its normal log
3258 files. Therefore, re-enable normal log processing, assuming the sysadmin
3259 has set up the log directory correctly.
3260
3261 (2) If deliver_drop_privilege is not set, the configuration won't work as
3262 apparently intended, and so we log a panic message. In order to retain
3263 root for -C or -D, the caller must either be root or the Exim user
3264 defined in the binary (when deliver_drop_ privilege is false).
3265
3266 If ALT_CONFIG_ROOT_ONLY is defined, we don't know whether we were called by the
3267 built-in exim user or one defined in the configuration. In either event,
3268 re-enable log processing, assuming the sysadmin knows what they are doing. */
3269
3270 if (removed_privilege && (config_changed || macros != NULL) &&
3271 real_uid == exim_uid)
3272 {
3273 #ifdef ALT_CONFIG_ROOT_ONLY
3274 really_exim = TRUE; /* let logging work normally */
3275 #else
3276
3277 if (deliver_drop_privilege)
3278 really_exim = TRUE; /* let logging work normally */
3279 else
3280 log_write(0, LOG_MAIN|LOG_PANIC,
3281 "exim user (uid=%d) is defined only at runtime; privilege lost for %s",
3282 (int)exim_uid, config_changed? "-C" : "-D");
3283 #endif
3284 }
3285
3286 /* Start up Perl interpreter if Perl support is configured and there is a
3287 perl_startup option, and the configuration or the command line specifies
3288 initializing starting. Note that the global variables are actually called
3289 opt_perl_xxx to avoid clashing with perl's namespace (perl_*). */
3290
3291 #ifdef EXIM_PERL
3292 if (perl_start_option != 0)
3293 opt_perl_at_start = (perl_start_option > 0);
3294 if (opt_perl_at_start && opt_perl_startup != NULL)
3295 {
3296 uschar *errstr;
3297 DEBUG(D_any) debug_printf("Starting Perl interpreter\n");
3298 errstr = init_perl(opt_perl_startup);
3299 if (errstr != NULL)
3300 {
3301 fprintf(stderr, "exim: error in perl_startup code: %s\n", errstr);
3302 return EXIT_FAILURE;
3303 }
3304 opt_perl_started = TRUE;
3305 }
3306 #endif /* EXIM_PERL */
3307
3308 /* Log the arguments of the call if the configuration file said so. This is
3309 a debugging feature for finding out what arguments certain MUAs actually use.
3310 Don't attempt it if logging is disabled, or if listing variables or if
3311 verifying/testing addresses or expansions. */
3312
3313 if (((debug_selector & D_any) != 0 || (log_extra_selector & LX_arguments) != 0)
3314 && really_exim && !list_options && !checking)
3315 {
3316 int i;
3317 uschar *p = big_buffer;
3318 Ustrcpy(p, "cwd=");
3319 (void)getcwd(CS p+4, big_buffer_size - 4);
3320 while (*p) p++;
3321 (void)string_format(p, big_buffer_size - (p - big_buffer), " %d args:", argc);
3322 while (*p) p++;
3323 for (i = 0; i < argc; i++)
3324 {
3325 int len = Ustrlen(argv[i]);
3326 uschar *printing;
3327 uschar *quote;
3328 if (p + len + 8 >= big_buffer + big_buffer_size)
3329 {
3330 Ustrcpy(p, " ...");
3331 log_write(0, LOG_MAIN, "%s", big_buffer);
3332 Ustrcpy(big_buffer, "...");
3333 p = big_buffer + 3;
3334 }
3335 printing = string_printing(argv[i]);
3336 if (printing[0] == 0) quote = US"\""; else
3337 {
3338 uschar *pp = printing;
3339 quote = US"";
3340 while (*pp != 0) if (isspace(*pp++)) { quote = US"\""; break; }
3341 }
3342 sprintf(CS p, " %s%.*s%s", quote, (int)(big_buffer_size -
3343 (p - big_buffer) - 4), printing, quote);
3344 while (*p) p++;
3345 }
3346
3347 if ((log_extra_selector & LX_arguments) != 0)
3348 log_write(0, LOG_MAIN, "%s", big_buffer);
3349 else
3350 debug_printf("%s\n", big_buffer);
3351 }
3352
3353 /* Set the working directory to be the top-level spool directory. We don't rely
3354 on this in the code, which always uses fully qualified names, but it's useful
3355 for core dumps etc. Don't complain if it fails - the spool directory might not
3356 be generally accessible and calls with the -C option (and others) have lost
3357 privilege by now. Before the chdir, we try to ensure that the directory exists.
3358 */
3359
3360 if (Uchdir(spool_directory) != 0)
3361 {
3362 (void)directory_make(spool_directory, US"", SPOOL_DIRECTORY_MODE, FALSE);
3363 (void)Uchdir(spool_directory);
3364 }
3365
3366 /* Handle calls with the -bi option. This is a sendmail option to rebuild *the*
3367 alias file. Exim doesn't have such a concept, but this call is screwed into
3368 Sun's YP makefiles. Handle this by calling a configured script, as the real
3369 user who called Exim. The -oA option can be used to pass an argument to the
3370 script. */
3371
3372 if (bi_option)
3373 {
3374 (void)fclose(config_file);
3375 if (bi_command != NULL)
3376 {
3377 int i = 0;
3378 uschar *argv[3];
3379 argv[i++] = bi_command;
3380 if (alias_arg != NULL) argv[i++] = alias_arg;
3381 argv[i++] = NULL;
3382
3383 setgroups(group_count, group_list);
3384 exim_setugid(real_uid, real_gid, FALSE, US"running bi_command");
3385
3386 DEBUG(D_exec) debug_printf("exec %.256s %.256s\n", argv[0],
3387 (argv[1] == NULL)? US"" : argv[1]);
3388
3389 execv(CS argv[0], (char *const *)argv);
3390 fprintf(stderr, "exim: exec failed: %s\n", strerror(errno));
3391 exit(EXIT_FAILURE);
3392 }
3393 else
3394 {
3395 DEBUG(D_any) debug_printf("-bi used but bi_command not set; exiting\n");
3396 exit(EXIT_SUCCESS);
3397 }
3398 }
3399
3400 /* If an action on specific messages is requested, or if a daemon or queue
3401 runner is being started, we need to know if Exim was called by an admin user.
3402 This is the case if the real user is root or exim, or if the real group is
3403 exim, or if one of the supplementary groups is exim or a group listed in
3404 admin_groups. We don't fail all message actions immediately if not admin_user,
3405 since some actions can be performed by non-admin users. Instead, set admin_user
3406 for later interrogation. */
3407
3408 if (real_uid == root_uid || real_uid == exim_uid || real_gid == exim_gid)
3409 admin_user = TRUE;
3410 else
3411 {
3412 int i, j;
3413
3414 for (i = 0; i < group_count; i++)
3415 {
3416 if (group_list[i] == exim_gid) admin_user = TRUE;
3417 else if (admin_groups != NULL)
3418 {
3419 for (j = 1; j <= (int)(admin_groups[0]); j++)
3420 if (admin_groups[j] == group_list[i])
3421 { admin_user = TRUE; break; }
3422 }
3423 if (admin_user) break;
3424 }
3425 }
3426
3427 /* Another group of privileged users are the trusted users. These are root,
3428 exim, and any caller matching trusted_users or trusted_groups. Trusted callers
3429 are permitted to specify sender_addresses with -f on the command line, and
3430 other message parameters as well. */
3431
3432 if (real_uid == root_uid || real_uid == exim_uid)
3433 trusted_caller = TRUE;
3434 else
3435 {
3436 int i, j;
3437
3438 if (trusted_users != NULL)
3439 {
3440 for (i = 1; i <= (int)(trusted_users[0]); i++)
3441 if (trusted_users[i] == real_uid)
3442 { trusted_caller = TRUE; break; }
3443 }
3444
3445 if (!trusted_caller && trusted_groups != NULL)
3446 {
3447 for (i = 1; i <= (int)(trusted_groups[0]); i++)
3448 {
3449 if (trusted_groups[i] == real_gid)
3450 trusted_caller = TRUE;
3451 else for (j = 0; j < group_count; j++)
3452 {
3453 if (trusted_groups[i] == group_list[j])
3454 { trusted_caller = TRUE; break; }
3455 }
3456 if (trusted_caller) break;
3457 }
3458 }
3459 }
3460
3461 if (trusted_caller) DEBUG(D_any) debug_printf("trusted user\n");
3462 if (admin_user) DEBUG(D_any) debug_printf("admin user\n");
3463
3464 /* Only an admin user may start the daemon or force a queue run in the default
3465 configuration, but the queue run restriction can be relaxed. Only an admin
3466 user may request that a message be returned to its sender forthwith. Only an
3467 admin user may specify a debug level greater than D_v (because it might show
3468 passwords, etc. in lookup queries). Only an admin user may request a queue
3469 count. */
3470
3471 if (!admin_user)
3472 {
3473 BOOL debugset = (debug_selector & ~D_v) != 0;
3474 if (deliver_give_up || daemon_listen ||
3475 (count_queue && queue_list_requires_admin) ||
3476 (list_queue && queue_list_requires_admin) ||
3477 (queue_interval >= 0 && prod_requires_admin) ||
3478 (debugset && !running_in_test_harness))
3479 {
3480 fprintf(stderr, "exim:%s permission denied\n", debugset? " debugging" : "");
3481 exit(EXIT_FAILURE);
3482 }
3483 }
3484
3485 /* If the real user is not root or the exim uid, the argument for passing
3486 in an open TCP/IP connection for another message is not permitted, nor is
3487 running with the -N option for any delivery action, unless this call to exim is
3488 one that supplied an input message, or we are using a patched exim for
3489 regression testing. */
3490
3491 if (real_uid != root_uid && real_uid != exim_uid &&
3492 (continue_hostname != NULL ||
3493 (dont_deliver &&
3494 (queue_interval >= 0 || daemon_listen || msg_action_arg > 0)
3495 )) && !running_in_test_harness)
3496 {
3497 fprintf(stderr, "exim: Permission denied\n");
3498 return EXIT_FAILURE;
3499 }
3500
3501 /* If the caller is not trusted, certain arguments are ignored when running for
3502 real, but are permitted when checking things (-be, -bv, -bt, -bh, -bf, -bF).
3503 Note that authority for performing certain actions on messages is tested in the
3504 queue_action() function. */
3505
3506 if (!trusted_caller && !checking && filter_test == FTEST_NONE)
3507 {
3508 sender_host_name = sender_host_address = interface_address =
3509 sender_ident = received_protocol = NULL;
3510 sender_host_port = interface_port = 0;
3511 sender_host_authenticated = authenticated_sender = authenticated_id = NULL;
3512 }
3513
3514 /* If a sender host address is set, extract the optional port number off the
3515 end of it and check its syntax. Do the same thing for the interface address.
3516 Exim exits if the syntax is bad. */
3517