4e4b6bb754570a71a635cd0d82d5ae2b917baf52
[exim.git] / src / src / exim.c
1 /*************************************************
2 * Exim - an Internet mail transport agent *
3 *************************************************/
4
5 /* Copyright (c) University of Cambridge 1995 - 2018 */
6 /* See the file NOTICE for conditions of use and distribution. */
7
8
9 /* The main function: entry point, initialization, and high-level control.
10 Also a few functions that don't naturally fit elsewhere. */
11
12
13 #include "exim.h"
14
15 #if defined(__GLIBC__) && !defined(__UCLIBC__)
16 # include <gnu/libc-version.h>
17 #endif
18
19 #ifdef USE_GNUTLS
20 # include <gnutls/gnutls.h>
21 # if GNUTLS_VERSION_NUMBER < 0x030103 && !defined(DISABLE_OCSP)
22 # define DISABLE_OCSP
23 # endif
24 #endif
25
26 #ifndef _TIME_H
27 # include <time.h>
28 #endif
29
30 extern void init_lookup_list(void);
31
32
33
34 /*************************************************
35 * Function interface to store functions *
36 *************************************************/
37
38 /* We need some real functions to pass to the PCRE regular expression library
39 for store allocation via Exim's store manager. The normal calls are actually
40 macros that pass over location information to make tracing easier. These
41 functions just interface to the standard macro calls. A good compiler will
42 optimize out the tail recursion and so not make them too expensive. There
43 are two sets of functions; one for use when we want to retain the compiled
44 regular expression for a long time; the other for short-term use. */
45
46 static void *
47 function_store_get(size_t size)
48 {
49 /* For now, regard all RE results as potentially tainted. We might need
50 more intelligence on this point. */
51 return store_get((int)size, TRUE);
52 }
53
54 static void
55 function_dummy_free(void *block) { block = block; }
56
57 static void *
58 function_store_malloc(size_t size)
59 {
60 return store_malloc((int)size);
61 }
62
63 static void
64 function_store_free(void *block)
65 {
66 store_free(block);
67 }
68
69
70
71
72 /*************************************************
73 * Enums for cmdline interface *
74 *************************************************/
75
76 enum commandline_info { CMDINFO_NONE=0,
77 CMDINFO_HELP, CMDINFO_SIEVE, CMDINFO_DSCP };
78
79
80
81
82 /*************************************************
83 * Compile regular expression and panic on fail *
84 *************************************************/
85
86 /* This function is called when failure to compile a regular expression leads
87 to a panic exit. In other cases, pcre_compile() is called directly. In many
88 cases where this function is used, the results of the compilation are to be
89 placed in long-lived store, so we temporarily reset the store management
90 functions that PCRE uses if the use_malloc flag is set.
91
92 Argument:
93 pattern the pattern to compile
94 caseless TRUE if caseless matching is required
95 use_malloc TRUE if compile into malloc store
96
97 Returns: pointer to the compiled pattern
98 */
99
100 const pcre *
101 regex_must_compile(const uschar *pattern, BOOL caseless, BOOL use_malloc)
102 {
103 int offset;
104 int options = PCRE_COPT;
105 const pcre *yield;
106 const uschar *error;
107 if (use_malloc)
108 {
109 pcre_malloc = function_store_malloc;
110 pcre_free = function_store_free;
111 }
112 if (caseless) options |= PCRE_CASELESS;
113 yield = pcre_compile(CCS pattern, options, CCSS &error, &offset, NULL);
114 pcre_malloc = function_store_get;
115 pcre_free = function_dummy_free;
116 if (yield == NULL)
117 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "regular expression error: "
118 "%s at offset %d while compiling %s", error, offset, pattern);
119 return yield;
120 }
121
122
123
124
125 /*************************************************
126 * Execute regular expression and set strings *
127 *************************************************/
128
129 /* This function runs a regular expression match, and sets up the pointers to
130 the matched substrings.
131
132 Arguments:
133 re the compiled expression
134 subject the subject string
135 options additional PCRE options
136 setup if < 0 do full setup
137 if >= 0 setup from setup+1 onwards,
138 excluding the full matched string
139
140 Returns: TRUE or FALSE
141 */
142
143 BOOL
144 regex_match_and_setup(const pcre *re, const uschar *subject, int options, int setup)
145 {
146 int ovector[3*(EXPAND_MAXN+1)];
147 uschar * s = string_copy(subject); /* de-constifying */
148 int n = pcre_exec(re, NULL, CS s, Ustrlen(s), 0,
149 PCRE_EOPT | options, ovector, nelem(ovector));
150 BOOL yield = n >= 0;
151 if (n == 0) n = EXPAND_MAXN + 1;
152 if (yield)
153 {
154 expand_nmax = setup < 0 ? 0 : setup + 1;
155 for (int nn = setup < 0 ? 0 : 2; nn < n*2; nn += 2)
156 {
157 expand_nstring[expand_nmax] = s + ovector[nn];
158 expand_nlength[expand_nmax++] = ovector[nn+1] - ovector[nn];
159 }
160 expand_nmax--;
161 }
162 return yield;
163 }
164
165
166
167
168 /*************************************************
169 * Set up processing details *
170 *************************************************/
171
172 /* Save a text string for dumping when SIGUSR1 is received.
173 Do checks for overruns.
174
175 Arguments: format and arguments, as for printf()
176 Returns: nothing
177 */
178
179 void
180 set_process_info(const char *format, ...)
181 {
182 gstring gs = { .size = PROCESS_INFO_SIZE - 2, .ptr = 0, .s = process_info };
183 gstring * g;
184 int len;
185 va_list ap;
186
187 g = string_fmt_append(&gs, "%5d ", (int)getpid());
188 len = g->ptr;
189 va_start(ap, format);
190 if (!string_vformat(g, 0, format, ap))
191 {
192 gs.ptr = len;
193 g = string_cat(&gs, US"**** string overflowed buffer ****");
194 }
195 g = string_catn(g, US"\n", 1);
196 string_from_gstring(g);
197 process_info_len = g->ptr;
198 DEBUG(D_process_info) debug_printf("set_process_info: %s", process_info);
199 va_end(ap);
200 }
201
202 /***********************************************
203 * Handler for SIGTERM *
204 ***********************************************/
205
206 static void
207 term_handler(int sig)
208 {
209 exit(1);
210 }
211
212
213 /*************************************************
214 * Handler for SIGUSR1 *
215 *************************************************/
216
217 /* SIGUSR1 causes any exim process to write to the process log details of
218 what it is currently doing. It will only be used if the OS is capable of
219 setting up a handler that causes automatic restarting of any system call
220 that is in progress at the time.
221
222 This function takes care to be signal-safe.
223
224 Argument: the signal number (SIGUSR1)
225 Returns: nothing
226 */
227
228 static void
229 usr1_handler(int sig)
230 {
231 int fd;
232
233 os_restarting_signal(sig, usr1_handler);
234
235 if ((fd = Uopen(process_log_path, O_APPEND|O_WRONLY, LOG_MODE)) < 0)
236 {
237 /* If we are already running as the Exim user, try to create it in the
238 current process (assuming spool_directory exists). Otherwise, if we are
239 root, do the creation in an exim:exim subprocess. */
240
241 int euid = geteuid();
242 if (euid == exim_uid)
243 fd = Uopen(process_log_path, O_CREAT|O_APPEND|O_WRONLY, LOG_MODE);
244 else if (euid == root_uid)
245 fd = log_create_as_exim(process_log_path);
246 }
247
248 /* If we are neither exim nor root, or if we failed to create the log file,
249 give up. There is not much useful we can do with errors, since we don't want
250 to disrupt whatever is going on outside the signal handler. */
251
252 if (fd < 0) return;
253
254 (void)write(fd, process_info, process_info_len);
255 (void)close(fd);
256 }
257
258
259
260 /*************************************************
261 * Timeout handler *
262 *************************************************/
263
264 /* This handler is enabled most of the time that Exim is running. The handler
265 doesn't actually get used unless alarm() has been called to set a timer, to
266 place a time limit on a system call of some kind. When the handler is run, it
267 re-enables itself.
268
269 There are some other SIGALRM handlers that are used in special cases when more
270 than just a flag setting is required; for example, when reading a message's
271 input. These are normally set up in the code module that uses them, and the
272 SIGALRM handler is reset to this one afterwards.
273
274 Argument: the signal value (SIGALRM)
275 Returns: nothing
276 */
277
278 void
279 sigalrm_handler(int sig)
280 {
281 sig = sig; /* Keep picky compilers happy */
282 sigalrm_seen = TRUE;
283 os_non_restarting_signal(SIGALRM, sigalrm_handler);
284 }
285
286
287
288 /*************************************************
289 * Sleep for a fractional time interval *
290 *************************************************/
291
292 /* This function is called by millisleep() and exim_wait_tick() to wait for a
293 period of time that may include a fraction of a second. The coding is somewhat
294 tedious. We do not expect setitimer() ever to fail, but if it does, the process
295 will wait for ever, so we panic in this instance. (There was a case of this
296 when a bug in a function that calls milliwait() caused it to pass invalid data.
297 That's when I added the check. :-)
298
299 We assume it to be not worth sleeping for under 50us; this value will
300 require revisiting as hardware advances. This avoids the issue of
301 a zero-valued timer setting meaning "never fire".
302
303 Argument: an itimerval structure containing the interval
304 Returns: nothing
305 */
306
307 static void
308 milliwait(struct itimerval *itval)
309 {
310 sigset_t sigmask;
311 sigset_t old_sigmask;
312
313 if (itval->it_value.tv_usec < 50 && itval->it_value.tv_sec == 0)
314 return;
315 (void)sigemptyset(&sigmask); /* Empty mask */
316 (void)sigaddset(&sigmask, SIGALRM); /* Add SIGALRM */
317 (void)sigprocmask(SIG_BLOCK, &sigmask, &old_sigmask); /* Block SIGALRM */
318 if (setitimer(ITIMER_REAL, itval, NULL) < 0) /* Start timer */
319 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
320 "setitimer() failed: %s", strerror(errno));
321 (void)sigfillset(&sigmask); /* All signals */
322 (void)sigdelset(&sigmask, SIGALRM); /* Remove SIGALRM */
323 (void)sigsuspend(&sigmask); /* Until SIGALRM */
324 (void)sigprocmask(SIG_SETMASK, &old_sigmask, NULL); /* Restore mask */
325 }
326
327
328
329
330 /*************************************************
331 * Millisecond sleep function *
332 *************************************************/
333
334 /* The basic sleep() function has a granularity of 1 second, which is too rough
335 in some cases - for example, when using an increasing delay to slow down
336 spammers.
337
338 Argument: number of millseconds
339 Returns: nothing
340 */
341
342 void
343 millisleep(int msec)
344 {
345 struct itimerval itval;
346 itval.it_interval.tv_sec = 0;
347 itval.it_interval.tv_usec = 0;
348 itval.it_value.tv_sec = msec/1000;
349 itval.it_value.tv_usec = (msec % 1000) * 1000;
350 milliwait(&itval);
351 }
352
353
354
355 /*************************************************
356 * Compare microsecond times *
357 *************************************************/
358
359 /*
360 Arguments:
361 tv1 the first time
362 tv2 the second time
363
364 Returns: -1, 0, or +1
365 */
366
367 static int
368 exim_tvcmp(struct timeval *t1, struct timeval *t2)
369 {
370 if (t1->tv_sec > t2->tv_sec) return +1;
371 if (t1->tv_sec < t2->tv_sec) return -1;
372 if (t1->tv_usec > t2->tv_usec) return +1;
373 if (t1->tv_usec < t2->tv_usec) return -1;
374 return 0;
375 }
376
377
378
379
380 /*************************************************
381 * Clock tick wait function *
382 *************************************************/
383
384 #ifdef _POSIX_MONOTONIC_CLOCK
385 /* Amount CLOCK_MONOTONIC is behind realtime, at startup. */
386 static struct timespec offset_ts;
387
388 static void
389 exim_clock_init(void)
390 {
391 struct timeval tv;
392 if (clock_gettime(CLOCK_MONOTONIC, &offset_ts) != 0) return;
393 (void)gettimeofday(&tv, NULL);
394 offset_ts.tv_sec = tv.tv_sec - offset_ts.tv_sec;
395 offset_ts.tv_nsec = tv.tv_usec * 1000 - offset_ts.tv_nsec;
396 if (offset_ts.tv_nsec >= 0) return;
397 offset_ts.tv_sec--;
398 offset_ts.tv_nsec += 1000*1000*1000;
399 }
400 #endif
401
402
403 /* Exim uses a time + a pid to generate a unique identifier in two places: its
404 message IDs, and in file names for maildir deliveries. Because some OS now
405 re-use pids within the same second, sub-second times are now being used.
406 However, for absolute certainty, we must ensure the clock has ticked before
407 allowing the relevant process to complete. At the time of implementation of
408 this code (February 2003), the speed of processors is such that the clock will
409 invariably have ticked already by the time a process has done its job. This
410 function prepares for the time when things are faster - and it also copes with
411 clocks that go backwards.
412
413 Arguments:
414 tgt_tv A timeval which was used to create uniqueness; its usec field
415 has been rounded down to the value of the resolution.
416 We want to be sure the current time is greater than this.
417 resolution The resolution that was used to divide the microseconds
418 (1 for maildir, larger for message ids)
419
420 Returns: nothing
421 */
422
423 void
424 exim_wait_tick(struct timeval * tgt_tv, int resolution)
425 {
426 struct timeval now_tv;
427 long int now_true_usec;
428
429 #ifdef _POSIX_MONOTONIC_CLOCK
430 struct timespec now_ts;
431
432 if (clock_gettime(CLOCK_MONOTONIC, &now_ts) == 0)
433 {
434 now_ts.tv_sec += offset_ts.tv_sec;
435 if ((now_ts.tv_nsec += offset_ts.tv_nsec) >= 1000*1000*1000)
436 {
437 now_ts.tv_sec++;
438 now_ts.tv_nsec -= 1000*1000*1000;
439 }
440 now_tv.tv_sec = now_ts.tv_sec;
441 now_true_usec = (now_ts.tv_nsec / (resolution * 1000)) * resolution;
442 now_tv.tv_usec = now_true_usec;
443 }
444 else
445 #endif
446 {
447 (void)gettimeofday(&now_tv, NULL);
448 now_true_usec = now_tv.tv_usec;
449 now_tv.tv_usec = (now_true_usec/resolution) * resolution;
450 }
451
452 while (exim_tvcmp(&now_tv, tgt_tv) <= 0)
453 {
454 struct itimerval itval;
455 itval.it_interval.tv_sec = 0;
456 itval.it_interval.tv_usec = 0;
457 itval.it_value.tv_sec = tgt_tv->tv_sec - now_tv.tv_sec;
458 itval.it_value.tv_usec = tgt_tv->tv_usec + resolution - now_true_usec;
459
460 /* We know that, overall, "now" is less than or equal to "then". Therefore, a
461 negative value for the microseconds is possible only in the case when "now"
462 is more than a second less than "tgt". That means that itval.it_value.tv_sec
463 is greater than zero. The following correction is therefore safe. */
464
465 if (itval.it_value.tv_usec < 0)
466 {
467 itval.it_value.tv_usec += 1000000;
468 itval.it_value.tv_sec -= 1;
469 }
470
471 DEBUG(D_transport|D_receive)
472 {
473 if (!f.running_in_test_harness)
474 {
475 debug_printf("tick check: " TIME_T_FMT ".%06lu " TIME_T_FMT ".%06lu\n",
476 tgt_tv->tv_sec, (long) tgt_tv->tv_usec,
477 now_tv.tv_sec, (long) now_tv.tv_usec);
478 debug_printf("waiting " TIME_T_FMT ".%06lu sec\n",
479 itval.it_value.tv_sec, (long) itval.it_value.tv_usec);
480 }
481 }
482
483 milliwait(&itval);
484
485 /* Be prapared to go around if the kernel does not implement subtick
486 granularity (GNU Hurd) */
487
488 (void)gettimeofday(&now_tv, NULL);
489 now_true_usec = now_tv.tv_usec;
490 now_tv.tv_usec = (now_true_usec/resolution) * resolution;
491 }
492 }
493
494
495
496
497 /*************************************************
498 * Call fopen() with umask 777 and adjust mode *
499 *************************************************/
500
501 /* Exim runs with umask(0) so that files created with open() have the mode that
502 is specified in the open() call. However, there are some files, typically in
503 the spool directory, that are created with fopen(). They end up world-writeable
504 if no precautions are taken. Although the spool directory is not accessible to
505 the world, this is an untidiness. So this is a wrapper function for fopen()
506 that sorts out the mode of the created file.
507
508 Arguments:
509 filename the file name
510 options the fopen() options
511 mode the required mode
512
513 Returns: the fopened FILE or NULL
514 */
515
516 FILE *
517 modefopen(const uschar *filename, const char *options, mode_t mode)
518 {
519 mode_t saved_umask = umask(0777);
520 FILE *f = Ufopen(filename, options);
521 (void)umask(saved_umask);
522 if (f != NULL) (void)fchmod(fileno(f), mode);
523 return f;
524 }
525
526
527 /*************************************************
528 * Ensure stdin, stdout, and stderr exist *
529 *************************************************/
530
531 /* Some operating systems grumble if an exec() happens without a standard
532 input, output, and error (fds 0, 1, 2) being defined. The worry is that some
533 file will be opened and will use these fd values, and then some other bit of
534 code will assume, for example, that it can write error messages to stderr.
535 This function ensures that fds 0, 1, and 2 are open if they do not already
536 exist, by connecting them to /dev/null.
537
538 This function is also used to ensure that std{in,out,err} exist at all times,
539 so that if any library that Exim calls tries to use them, it doesn't crash.
540
541 Arguments: None
542 Returns: Nothing
543 */
544
545 void
546 exim_nullstd(void)
547 {
548 int devnull = -1;
549 struct stat statbuf;
550 for (int i = 0; i <= 2; i++)
551 {
552 if (fstat(i, &statbuf) < 0 && errno == EBADF)
553 {
554 if (devnull < 0) devnull = open("/dev/null", O_RDWR);
555 if (devnull < 0) log_write(0, LOG_MAIN|LOG_PANIC_DIE, "%s",
556 string_open_failed(errno, "/dev/null", NULL));
557 if (devnull != i) (void)dup2(devnull, i);
558 }
559 }
560 if (devnull > 2) (void)close(devnull);
561 }
562
563
564
565
566 /*************************************************
567 * Close unwanted file descriptors for delivery *
568 *************************************************/
569
570 /* This function is called from a new process that has been forked to deliver
571 an incoming message, either directly, or using exec.
572
573 We want any smtp input streams to be closed in this new process. However, it
574 has been observed that using fclose() here causes trouble. When reading in -bS
575 input, duplicate copies of messages have been seen. The files will be sharing a
576 file pointer with the parent process, and it seems that fclose() (at least on
577 some systems - I saw this on Solaris 2.5.1) messes with that file pointer, at
578 least sometimes. Hence we go for closing the underlying file descriptors.
579
580 If TLS is active, we want to shut down the TLS library, but without molesting
581 the parent's SSL connection.
582
583 For delivery of a non-SMTP message, we want to close stdin and stdout (and
584 stderr unless debugging) because the calling process might have set them up as
585 pipes and be waiting for them to close before it waits for the submission
586 process to terminate. If they aren't closed, they hold up the calling process
587 until the initial delivery process finishes, which is not what we want.
588
589 Exception: We do want it for synchronous delivery!
590
591 And notwithstanding all the above, if D_resolver is set, implying resolver
592 debugging, leave stdout open, because that's where the resolver writes its
593 debugging output.
594
595 When we close stderr (which implies we've also closed stdout), we also get rid
596 of any controlling terminal.
597
598 Arguments: None
599 Returns: Nothing
600 */
601
602 static void
603 close_unwanted(void)
604 {
605 if (smtp_input)
606 {
607 #ifndef DISABLE_TLS
608 tls_close(NULL, TLS_NO_SHUTDOWN); /* Shut down the TLS library */
609 #endif
610 (void)close(fileno(smtp_in));
611 (void)close(fileno(smtp_out));
612 smtp_in = NULL;
613 }
614 else
615 {
616 (void)close(0); /* stdin */
617 if ((debug_selector & D_resolver) == 0) (void)close(1); /* stdout */
618 if (debug_selector == 0) /* stderr */
619 {
620 if (!f.synchronous_delivery)
621 {
622 (void)close(2);
623 log_stderr = NULL;
624 }
625 (void)setsid();
626 }
627 }
628 }
629
630
631
632
633 /*************************************************
634 * Set uid and gid *
635 *************************************************/
636
637 /* This function sets a new uid and gid permanently, optionally calling
638 initgroups() to set auxiliary groups. There are some special cases when running
639 Exim in unprivileged modes. In these situations the effective uid will not be
640 root; if we already have the right effective uid/gid, and don't need to
641 initialize any groups, leave things as they are.
642
643 Arguments:
644 uid the uid
645 gid the gid
646 igflag TRUE if initgroups() wanted
647 msg text to use in debugging output and failure log
648
649 Returns: nothing; bombs out on failure
650 */
651
652 void
653 exim_setugid(uid_t uid, gid_t gid, BOOL igflag, uschar *msg)
654 {
655 uid_t euid = geteuid();
656 gid_t egid = getegid();
657
658 if (euid == root_uid || euid != uid || egid != gid || igflag)
659 {
660 /* At least one OS returns +1 for initgroups failure, so just check for
661 non-zero. */
662
663 if (igflag)
664 {
665 struct passwd *pw = getpwuid(uid);
666 if (!pw)
667 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "cannot run initgroups(): "
668 "no passwd entry for uid=%ld", (long int)uid);
669
670 if (initgroups(pw->pw_name, gid) != 0)
671 log_write(0,LOG_MAIN|LOG_PANIC_DIE,"initgroups failed for uid=%ld: %s",
672 (long int)uid, strerror(errno));
673 }
674
675 if (setgid(gid) < 0 || setuid(uid) < 0)
676 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "unable to set gid=%ld or uid=%ld "
677 "(euid=%ld): %s", (long int)gid, (long int)uid, (long int)euid, msg);
678 }
679
680 /* Debugging output included uid/gid and all groups */
681
682 DEBUG(D_uid)
683 {
684 int group_count, save_errno;
685 gid_t group_list[EXIM_GROUPLIST_SIZE];
686 debug_printf("changed uid/gid: %s\n uid=%ld gid=%ld pid=%ld\n", msg,
687 (long int)geteuid(), (long int)getegid(), (long int)getpid());
688 group_count = getgroups(nelem(group_list), group_list);
689 save_errno = errno;
690 debug_printf(" auxiliary group list:");
691 if (group_count > 0)
692 for (int i = 0; i < group_count; i++) debug_printf(" %d", (int)group_list[i]);
693 else if (group_count < 0)
694 debug_printf(" <error: %s>", strerror(save_errno));
695 else debug_printf(" <none>");
696 debug_printf("\n");
697 }
698 }
699
700
701
702
703 /*************************************************
704 * Exit point *
705 *************************************************/
706
707 /* Exim exits via this function so that it always clears up any open
708 databases.
709
710 Arguments:
711 rc return code
712
713 Returns: does not return
714 */
715
716 void
717 exim_exit(int rc, const uschar * process)
718 {
719 search_tidyup();
720 store_exit();
721 DEBUG(D_any)
722 debug_printf(">>>>>>>>>>>>>>>> Exim pid=%d %s%s%sterminating with rc=%d "
723 ">>>>>>>>>>>>>>>>\n", (int)getpid(),
724 process ? "(" : "", process, process ? ") " : "", rc);
725 exit(rc);
726 }
727
728
729 void
730 exim_underbar_exit(int rc, const uschar * process)
731 {
732 store_exit();
733 DEBUG(D_any)
734 debug_printf(">>>>>>>>>>>>>>>> Exim pid=%d %s%s%sterminating with rc=%d "
735 ">>>>>>>>>>>>>>>>\n", (int)getpid(),
736 process ? "(" : "", process, process ? ") " : "", rc);
737 _exit(rc);
738 }
739
740
741
742 /* Print error string, then die */
743 static void
744 exim_fail(const char * fmt, ...)
745 {
746 va_list ap;
747 va_start(ap, fmt);
748 vfprintf(stderr, fmt, ap);
749 exit(EXIT_FAILURE);
750 }
751
752 /* exim_chown_failure() called from exim_chown()/exim_fchown() on failure
753 of chown()/fchown(). See src/functions.h for more explanation */
754 int
755 exim_chown_failure(int fd, const uschar *name, uid_t owner, gid_t group)
756 {
757 int saved_errno = errno; /* from the preceeding chown call */
758 #if 1
759 log_write(0, LOG_MAIN|LOG_PANIC,
760 __FILE__ ":%d: chown(%s, %d:%d) failed (%s)."
761 " Please contact the authors and refer to https://bugs.exim.org/show_bug.cgi?id=2391",
762 __LINE__, name?name:US"<unknown>", owner, group, strerror(errno));
763 #else
764 /* I leave this here, commented, in case the "bug"(?) comes up again.
765 It is not an Exim bug, but we can provide a workaround.
766 See Bug 2391
767 HS 2019-04-18 */
768
769 struct stat buf;
770
771 if (0 == (fd < 0 ? stat(name, &buf) : fstat(fd, &buf)))
772 {
773 if (buf.st_uid == owner && buf.st_gid == group) return 0;
774 log_write(0, LOG_MAIN|LOG_PANIC, "Wrong ownership on %s", name);
775 }
776 else log_write(0, LOG_MAIN|LOG_PANIC, "Stat failed on %s: %s", name, strerror(errno));
777
778 #endif
779 errno = saved_errno;
780 return -1;
781 }
782
783
784 /*************************************************
785 * Extract port from host address *
786 *************************************************/
787
788 /* Called to extract the port from the values given to -oMa and -oMi.
789 It also checks the syntax of the address, and terminates it before the
790 port data when a port is extracted.
791
792 Argument:
793 address the address, with possible port on the end
794
795 Returns: the port, or zero if there isn't one
796 bombs out on a syntax error
797 */
798
799 static int
800 check_port(uschar *address)
801 {
802 int port = host_address_extract_port(address);
803 if (string_is_ip_address(address, NULL) == 0)
804 exim_fail("exim abandoned: \"%s\" is not an IP address\n", address);
805 return port;
806 }
807
808
809
810 /*************************************************
811 * Test/verify an address *
812 *************************************************/
813
814 /* This function is called by the -bv and -bt code. It extracts a working
815 address from a full RFC 822 address. This isn't really necessary per se, but it
816 has the effect of collapsing source routes.
817
818 Arguments:
819 s the address string
820 flags flag bits for verify_address()
821 exit_value to be set for failures
822
823 Returns: nothing
824 */
825
826 static void
827 test_address(uschar *s, int flags, int *exit_value)
828 {
829 int start, end, domain;
830 uschar *parse_error = NULL;
831 uschar *address = parse_extract_address(s, &parse_error, &start, &end, &domain,
832 FALSE);
833 if (address == NULL)
834 {
835 fprintf(stdout, "syntax error: %s\n", parse_error);
836 *exit_value = 2;
837 }
838 else
839 {
840 int rc = verify_address(deliver_make_addr(address,TRUE), stdout, flags, -1,
841 -1, -1, NULL, NULL, NULL);
842 if (rc == FAIL) *exit_value = 2;
843 else if (rc == DEFER && *exit_value == 0) *exit_value = 1;
844 }
845 }
846
847
848
849 /*************************************************
850 * Show supported features *
851 *************************************************/
852
853 static void
854 show_db_version(FILE * f)
855 {
856 #ifdef DB_VERSION_STRING
857 DEBUG(D_any)
858 {
859 fprintf(f, "Library version: BDB: Compile: %s\n", DB_VERSION_STRING);
860 fprintf(f, " Runtime: %s\n",
861 db_version(NULL, NULL, NULL));
862 }
863 else
864 fprintf(f, "Berkeley DB: %s\n", DB_VERSION_STRING);
865
866 #elif defined(BTREEVERSION) && defined(HASHVERSION)
867 #ifdef USE_DB
868 fprintf(f, "Probably Berkeley DB version 1.8x (native mode)\n");
869 #else
870 fprintf(f, "Probably Berkeley DB version 1.8x (compatibility mode)\n");
871 #endif
872
873 #elif defined(_DBM_RDONLY) || defined(dbm_dirfno)
874 fprintf(f, "Probably ndbm\n");
875 #elif defined(USE_TDB)
876 fprintf(f, "Using tdb\n");
877 #else
878 #ifdef USE_GDBM
879 fprintf(f, "Probably GDBM (native mode)\n");
880 #else
881 fprintf(f, "Probably GDBM (compatibility mode)\n");
882 #endif
883 #endif
884 }
885
886
887 /* This function is called for -bV/--version and for -d to output the optional
888 features of the current Exim binary.
889
890 Arguments: a FILE for printing
891 Returns: nothing
892 */
893
894 static void
895 show_whats_supported(FILE * fp)
896 {
897 DEBUG(D_any) {} else show_db_version(fp);
898
899 fprintf(fp, "Support for:");
900 #ifdef SUPPORT_CRYPTEQ
901 fprintf(fp, " crypteq");
902 #endif
903 #if HAVE_ICONV
904 fprintf(fp, " iconv()");
905 #endif
906 #if HAVE_IPV6
907 fprintf(fp, " IPv6");
908 #endif
909 #ifdef HAVE_SETCLASSRESOURCES
910 fprintf(fp, " use_setclassresources");
911 #endif
912 #ifdef SUPPORT_PAM
913 fprintf(fp, " PAM");
914 #endif
915 #ifdef EXIM_PERL
916 fprintf(fp, " Perl");
917 #endif
918 #ifdef EXPAND_DLFUNC
919 fprintf(fp, " Expand_dlfunc");
920 #endif
921 #ifdef USE_TCP_WRAPPERS
922 fprintf(fp, " TCPwrappers");
923 #endif
924 #ifdef USE_GNUTLS
925 fprintf(fp, " GnuTLS");
926 #endif
927 #ifdef USE_OPENSSL
928 fprintf(fp, " OpenSSL");
929 #endif
930 #ifdef SUPPORT_TRANSLATE_IP_ADDRESS
931 fprintf(fp, " translate_ip_address");
932 #endif
933 #ifdef SUPPORT_MOVE_FROZEN_MESSAGES
934 fprintf(fp, " move_frozen_messages");
935 #endif
936 #ifdef WITH_CONTENT_SCAN
937 fprintf(fp, " Content_Scanning");
938 #endif
939 #ifdef SUPPORT_DANE
940 fprintf(fp, " DANE");
941 #endif
942 #ifndef DISABLE_DKIM
943 fprintf(fp, " DKIM");
944 #endif
945 #ifndef DISABLE_DNSSEC
946 fprintf(fp, " DNSSEC");
947 #endif
948 #ifndef DISABLE_EVENT
949 fprintf(fp, " Event");
950 #endif
951 #ifdef SUPPORT_I18N
952 fprintf(fp, " I18N");
953 #endif
954 #ifndef DISABLE_OCSP
955 fprintf(fp, " OCSP");
956 #endif
957 #ifndef DISABLE_PIPE_CONNECT
958 fprintf(fp, " PIPE_CONNECT");
959 #endif
960 #ifndef DISABLE_PRDR
961 fprintf(fp, " PRDR");
962 #endif
963 #ifdef SUPPORT_PROXY
964 fprintf(fp, " PROXY");
965 #endif
966 #ifdef SUPPORT_SOCKS
967 fprintf(fp, " SOCKS");
968 #endif
969 #ifdef SUPPORT_SPF
970 fprintf(fp, " SPF");
971 #endif
972 #ifdef SUPPORT_DMARC
973 fprintf(fp, " DMARC");
974 #endif
975 #ifdef TCP_FASTOPEN
976 tcp_init();
977 if (f.tcp_fastopen_ok) fprintf(fp, " TCP_Fast_Open");
978 #endif
979 #ifdef EXPERIMENTAL_ARC
980 fprintf(fp, " Experimental_ARC");
981 #endif
982 #ifdef EXPERIMENTAL_BRIGHTMAIL
983 fprintf(fp, " Experimental_Brightmail");
984 #endif
985 #ifdef EXPERIMENTAL_DCC
986 fprintf(fp, " Experimental_DCC");
987 #endif
988 #ifdef EXPERIMENTAL_DSN_INFO
989 fprintf(fp, " Experimental_DSN_info");
990 #endif
991 #ifdef EXPERIMENTAL_LMDB
992 fprintf(fp, " Experimental_LMDB");
993 #endif
994 #ifdef EXPERIMENTAL_QUEUE_RAMP
995 fprintf(fp, " Experimental_Queue_Ramp");
996 #endif
997 #ifdef EXPERIMENTAL_QUEUEFILE
998 fprintf(fp, " Experimental_QUEUEFILE");
999 #endif
1000 #if defined(EXPERIMENTAL_SRS) || defined(EXPERIMENTAL_SRS_NATIVE)
1001 fprintf(fp, " Experimental_SRS");
1002 #endif
1003 #ifdef EXPERIMENTAL_TLS_RESUME
1004 fprintf(fp, " Experimental_TLS_resume");
1005 #endif
1006 fprintf(fp, "\n");
1007
1008 fprintf(fp, "Lookups (built-in):");
1009 #if defined(LOOKUP_LSEARCH) && LOOKUP_LSEARCH!=2
1010 fprintf(fp, " lsearch wildlsearch nwildlsearch iplsearch");
1011 #endif
1012 #if defined(LOOKUP_CDB) && LOOKUP_CDB!=2
1013 fprintf(fp, " cdb");
1014 #endif
1015 #if defined(LOOKUP_DBM) && LOOKUP_DBM!=2
1016 fprintf(fp, " dbm dbmjz dbmnz");
1017 #endif
1018 #if defined(LOOKUP_DNSDB) && LOOKUP_DNSDB!=2
1019 fprintf(fp, " dnsdb");
1020 #endif
1021 #if defined(LOOKUP_DSEARCH) && LOOKUP_DSEARCH!=2
1022 fprintf(fp, " dsearch");
1023 #endif
1024 #if defined(LOOKUP_IBASE) && LOOKUP_IBASE!=2
1025 fprintf(fp, " ibase");
1026 #endif
1027 #if defined(LOOKUP_JSON) && LOOKUP_JSON!=2
1028 fprintf(fp, " json");
1029 #endif
1030 #if defined(LOOKUP_LDAP) && LOOKUP_LDAP!=2
1031 fprintf(fp, " ldap ldapdn ldapm");
1032 #endif
1033 #ifdef EXPERIMENTAL_LMDB
1034 fprintf(fp, " lmdb");
1035 #endif
1036 #if defined(LOOKUP_MYSQL) && LOOKUP_MYSQL!=2
1037 fprintf(fp, " mysql");
1038 #endif
1039 #if defined(LOOKUP_NIS) && LOOKUP_NIS!=2
1040 fprintf(fp, " nis nis0");
1041 #endif
1042 #if defined(LOOKUP_NISPLUS) && LOOKUP_NISPLUS!=2
1043 fprintf(fp, " nisplus");
1044 #endif
1045 #if defined(LOOKUP_ORACLE) && LOOKUP_ORACLE!=2
1046 fprintf(fp, " oracle");
1047 #endif
1048 #if defined(LOOKUP_PASSWD) && LOOKUP_PASSWD!=2
1049 fprintf(fp, " passwd");
1050 #endif
1051 #if defined(LOOKUP_PGSQL) && LOOKUP_PGSQL!=2
1052 fprintf(fp, " pgsql");
1053 #endif
1054 #if defined(LOOKUP_REDIS) && LOOKUP_REDIS!=2
1055 fprintf(fp, " redis");
1056 #endif
1057 #if defined(LOOKUP_SQLITE) && LOOKUP_SQLITE!=2
1058 fprintf(fp, " sqlite");
1059 #endif
1060 #if defined(LOOKUP_TESTDB) && LOOKUP_TESTDB!=2
1061 fprintf(fp, " testdb");
1062 #endif
1063 #if defined(LOOKUP_WHOSON) && LOOKUP_WHOSON!=2
1064 fprintf(fp, " whoson");
1065 #endif
1066 fprintf(fp, "\n");
1067
1068 auth_show_supported(fp);
1069 route_show_supported(fp);
1070 transport_show_supported(fp);
1071
1072 #ifdef WITH_CONTENT_SCAN
1073 malware_show_supported(fp);
1074 #endif
1075
1076 if (fixed_never_users[0] > 0)
1077 {
1078 int i;
1079 fprintf(fp, "Fixed never_users: ");
1080 for (i = 1; i <= (int)fixed_never_users[0] - 1; i++)
1081 fprintf(fp, "%d:", (unsigned int)fixed_never_users[i]);
1082 fprintf(fp, "%d\n", (unsigned int)fixed_never_users[i]);
1083 }
1084
1085 fprintf(fp, "Configure owner: %d:%d\n", config_uid, config_gid);
1086
1087 fprintf(fp, "Size of off_t: " SIZE_T_FMT "\n", sizeof(off_t));
1088
1089 /* Everything else is details which are only worth reporting when debugging.
1090 Perhaps the tls_version_report should move into this too. */
1091 DEBUG(D_any) do {
1092
1093 /* clang defines __GNUC__ (at least, for me) so test for it first */
1094 #if defined(__clang__)
1095 fprintf(fp, "Compiler: CLang [%s]\n", __clang_version__);
1096 #elif defined(__GNUC__)
1097 fprintf(fp, "Compiler: GCC [%s]\n",
1098 # ifdef __VERSION__
1099 __VERSION__
1100 # else
1101 "? unknown version ?"
1102 # endif
1103 );
1104 #else
1105 fprintf(fp, "Compiler: <unknown>\n");
1106 #endif
1107
1108 #if defined(__GLIBC__) && !defined(__UCLIBC__)
1109 fprintf(fp, "Library version: Glibc: Compile: %d.%d\n",
1110 __GLIBC__, __GLIBC_MINOR__);
1111 if (__GLIBC_PREREQ(2, 1))
1112 fprintf(fp, " Runtime: %s\n",
1113 gnu_get_libc_version());
1114 #endif
1115
1116 show_db_version(fp);
1117
1118 #ifndef DISABLE_TLS
1119 tls_version_report(fp);
1120 #endif
1121 #ifdef SUPPORT_I18N
1122 utf8_version_report(fp);
1123 #endif
1124 #ifdef SUPPORT_SPF
1125 spf_lib_version_report(fp);
1126 #endif
1127
1128 for (auth_info * authi = auths_available; *authi->driver_name != '\0'; ++authi)
1129 if (authi->version_report)
1130 (*authi->version_report)(fp);
1131
1132 /* PCRE_PRERELEASE is either defined and empty or a bare sequence of
1133 characters; unless it's an ancient version of PCRE in which case it
1134 is not defined. */
1135 #ifndef PCRE_PRERELEASE
1136 # define PCRE_PRERELEASE
1137 #endif
1138 #define QUOTE(X) #X
1139 #define EXPAND_AND_QUOTE(X) QUOTE(X)
1140 fprintf(fp, "Library version: PCRE: Compile: %d.%d%s\n"
1141 " Runtime: %s\n",
1142 PCRE_MAJOR, PCRE_MINOR,
1143 EXPAND_AND_QUOTE(PCRE_PRERELEASE) "",
1144 pcre_version());
1145 #undef QUOTE
1146 #undef EXPAND_AND_QUOTE
1147
1148 init_lookup_list();
1149 for (int i = 0; i < lookup_list_count; i++)
1150 if (lookup_list[i]->version_report)
1151 lookup_list[i]->version_report(fp);
1152
1153 #ifdef WHITELIST_D_MACROS
1154 fprintf(fp, "WHITELIST_D_MACROS: \"%s\"\n", WHITELIST_D_MACROS);
1155 #else
1156 fprintf(fp, "WHITELIST_D_MACROS unset\n");
1157 #endif
1158 #ifdef TRUSTED_CONFIG_LIST
1159 fprintf(fp, "TRUSTED_CONFIG_LIST: \"%s\"\n", TRUSTED_CONFIG_LIST);
1160 #else
1161 fprintf(fp, "TRUSTED_CONFIG_LIST unset\n");
1162 #endif
1163
1164 } while (0);
1165 }
1166
1167
1168 /*************************************************
1169 * Show auxiliary information about Exim *
1170 *************************************************/
1171
1172 static void
1173 show_exim_information(enum commandline_info request, FILE *stream)
1174 {
1175 switch(request)
1176 {
1177 case CMDINFO_NONE:
1178 fprintf(stream, "Oops, something went wrong.\n");
1179 return;
1180 case CMDINFO_HELP:
1181 fprintf(stream,
1182 "The -bI: flag takes a string indicating which information to provide.\n"
1183 "If the string is not recognised, you'll get this help (on stderr).\n"
1184 "\n"
1185 " exim -bI:help this information\n"
1186 " exim -bI:dscp list of known dscp value keywords\n"
1187 " exim -bI:sieve list of supported sieve extensions\n"
1188 );
1189 return;
1190 case CMDINFO_SIEVE:
1191 for (const uschar ** pp = exim_sieve_extension_list; *pp; ++pp)
1192 fprintf(stream, "%s\n", *pp);
1193 return;
1194 case CMDINFO_DSCP:
1195 dscp_list_to_stream(stream);
1196 return;
1197 }
1198 }
1199
1200
1201 /*************************************************
1202 * Quote a local part *
1203 *************************************************/
1204
1205 /* This function is used when a sender address or a From: or Sender: header
1206 line is being created from the caller's login, or from an authenticated_id. It
1207 applies appropriate quoting rules for a local part.
1208
1209 Argument: the local part
1210 Returns: the local part, quoted if necessary
1211 */
1212
1213 uschar *
1214 local_part_quote(uschar *lpart)
1215 {
1216 BOOL needs_quote = FALSE;
1217 gstring * g;
1218
1219 for (uschar * t = lpart; !needs_quote && *t != 0; t++)
1220 {
1221 needs_quote = !isalnum(*t) && strchr("!#$%&'*+-/=?^_`{|}~", *t) == NULL &&
1222 (*t != '.' || t == lpart || t[1] == 0);
1223 }
1224
1225 if (!needs_quote) return lpart;
1226
1227 g = string_catn(NULL, US"\"", 1);
1228
1229 for (;;)
1230 {
1231 uschar *nq = US Ustrpbrk(lpart, "\\\"");
1232 if (nq == NULL)
1233 {
1234 g = string_cat(g, lpart);
1235 break;
1236 }
1237 g = string_catn(g, lpart, nq - lpart);
1238 g = string_catn(g, US"\\", 1);
1239 g = string_catn(g, nq, 1);
1240 lpart = nq + 1;
1241 }
1242
1243 g = string_catn(g, US"\"", 1);
1244 return string_from_gstring(g);
1245 }
1246
1247
1248
1249 #ifdef USE_READLINE
1250 /*************************************************
1251 * Load readline() functions *
1252 *************************************************/
1253
1254 /* This function is called from testing executions that read data from stdin,
1255 but only when running as the calling user. Currently, only -be does this. The
1256 function loads the readline() function library and passes back the functions.
1257 On some systems, it needs the curses library, so load that too, but try without
1258 it if loading fails. All this functionality has to be requested at build time.
1259
1260 Arguments:
1261 fn_readline_ptr pointer to where to put the readline pointer
1262 fn_addhist_ptr pointer to where to put the addhistory function
1263
1264 Returns: the dlopen handle or NULL on failure
1265 */
1266
1267 static void *
1268 set_readline(char * (**fn_readline_ptr)(const char *),
1269 void (**fn_addhist_ptr)(const char *))
1270 {
1271 void *dlhandle;
1272 void *dlhandle_curses = dlopen("libcurses." DYNLIB_FN_EXT, RTLD_GLOBAL|RTLD_LAZY);
1273
1274 dlhandle = dlopen("libreadline." DYNLIB_FN_EXT, RTLD_GLOBAL|RTLD_NOW);
1275 if (dlhandle_curses) dlclose(dlhandle_curses);
1276
1277 if (dlhandle)
1278 {
1279 /* Checked manual pages; at least in GNU Readline 6.1, the prototypes are:
1280 * char * readline (const char *prompt);
1281 * void add_history (const char *string);
1282 */
1283 *fn_readline_ptr = (char *(*)(const char*))dlsym(dlhandle, "readline");
1284 *fn_addhist_ptr = (void(*)(const char*))dlsym(dlhandle, "add_history");
1285 }
1286 else
1287 DEBUG(D_any) debug_printf("failed to load readline: %s\n", dlerror());
1288
1289 return dlhandle;
1290 }
1291 #endif
1292
1293
1294
1295 /*************************************************
1296 * Get a line from stdin for testing things *
1297 *************************************************/
1298
1299 /* This function is called when running tests that can take a number of lines
1300 of input (for example, -be and -bt). It handles continuations and trailing
1301 spaces. And prompting and a blank line output on eof. If readline() is in use,
1302 the arguments are non-NULL and provide the relevant functions.
1303
1304 Arguments:
1305 fn_readline readline function or NULL
1306 fn_addhist addhist function or NULL
1307
1308 Returns: pointer to dynamic memory, or NULL at end of file
1309 */
1310
1311 static uschar *
1312 get_stdinput(char *(*fn_readline)(const char *), void(*fn_addhist)(const char *))
1313 {
1314 gstring * g = NULL;
1315
1316 if (!fn_readline) { printf("> "); fflush(stdout); }
1317
1318 for (int i = 0;; i++)
1319 {
1320 uschar buffer[1024];
1321 uschar *p, *ss;
1322
1323 #ifdef USE_READLINE
1324 char *readline_line = NULL;
1325 if (fn_readline)
1326 {
1327 if (!(readline_line = fn_readline((i > 0)? "":"> "))) break;
1328 if (*readline_line != 0 && fn_addhist) fn_addhist(readline_line);
1329 p = US readline_line;
1330 }
1331 else
1332 #endif
1333
1334 /* readline() not in use */
1335
1336 {
1337 if (Ufgets(buffer, sizeof(buffer), stdin) == NULL) break;
1338 p = buffer;
1339 }
1340
1341 /* Handle the line */
1342
1343 ss = p + (int)Ustrlen(p);
1344 while (ss > p && isspace(ss[-1])) ss--;
1345
1346 if (i > 0)
1347 while (p < ss && isspace(*p)) p++; /* leading space after cont */
1348
1349 g = string_catn(g, p, ss - p);
1350
1351 #ifdef USE_READLINE
1352 if (fn_readline) free(readline_line);
1353 #endif
1354
1355 /* g can only be NULL if ss==p */
1356 if (ss == p || g->s[g->ptr-1] != '\\')
1357 break;
1358
1359 --g->ptr;
1360 (void) string_from_gstring(g);
1361 }
1362
1363 if (!g) printf("\n");
1364 return string_from_gstring(g);
1365 }
1366
1367
1368
1369 /*************************************************
1370 * Output usage information for the program *
1371 *************************************************/
1372
1373 /* This function is called when there are no recipients
1374 or a specific --help argument was added.
1375
1376 Arguments:
1377 progname information on what name we were called by
1378
1379 Returns: DOES NOT RETURN
1380 */
1381
1382 static void
1383 exim_usage(uschar *progname)
1384 {
1385
1386 /* Handle specific program invocation variants */
1387 if (Ustrcmp(progname, US"-mailq") == 0)
1388 exim_fail(
1389 "mailq - list the contents of the mail queue\n\n"
1390 "For a list of options, see the Exim documentation.\n");
1391
1392 /* Generic usage - we output this whatever happens */
1393 exim_fail(
1394 "Exim is a Mail Transfer Agent. It is normally called by Mail User Agents,\n"
1395 "not directly from a shell command line. Options and/or arguments control\n"
1396 "what it does when called. For a list of options, see the Exim documentation.\n");
1397 }
1398
1399
1400
1401 /*************************************************
1402 * Validate that the macros given are okay *
1403 *************************************************/
1404
1405 /* Typically, Exim will drop privileges if macros are supplied. In some
1406 cases, we want to not do so.
1407
1408 Arguments: opt_D_used - true if the commandline had a "-D" option
1409 Returns: true if trusted, false otherwise
1410 */
1411
1412 static BOOL
1413 macros_trusted(BOOL opt_D_used)
1414 {
1415 #ifdef WHITELIST_D_MACROS
1416 uschar *whitelisted, *end, *p, **whites;
1417 int white_count, i, n;
1418 size_t len;
1419 BOOL prev_char_item, found;
1420 #endif
1421
1422 if (!opt_D_used)
1423 return TRUE;
1424 #ifndef WHITELIST_D_MACROS
1425 return FALSE;
1426 #else
1427
1428 /* We only trust -D overrides for some invoking users:
1429 root, the exim run-time user, the optional config owner user.
1430 I don't know why config-owner would be needed, but since they can own the
1431 config files anyway, there's no security risk to letting them override -D. */
1432 if ( ! ((real_uid == root_uid)
1433 || (real_uid == exim_uid)
1434 #ifdef CONFIGURE_OWNER
1435 || (real_uid == config_uid)
1436 #endif
1437 ))
1438 {
1439 debug_printf("macros_trusted rejecting macros for uid %d\n", (int) real_uid);
1440 return FALSE;
1441 }
1442
1443 /* Get a list of macros which are whitelisted */
1444 whitelisted = string_copy_perm(US WHITELIST_D_MACROS, FALSE);
1445 prev_char_item = FALSE;
1446 white_count = 0;
1447 for (p = whitelisted; *p != '\0'; ++p)
1448 {
1449 if (*p == ':' || isspace(*p))
1450 {
1451 *p = '\0';
1452 if (prev_char_item)
1453 ++white_count;
1454 prev_char_item = FALSE;
1455 continue;
1456 }
1457 if (!prev_char_item)
1458 prev_char_item = TRUE;
1459 }
1460 end = p;
1461 if (prev_char_item)
1462 ++white_count;
1463 if (!white_count)
1464 return FALSE;
1465 whites = store_malloc(sizeof(uschar *) * (white_count+1));
1466 for (p = whitelisted, i = 0; (p != end) && (i < white_count); ++p)
1467 {
1468 if (*p != '\0')
1469 {
1470 whites[i++] = p;
1471 if (i == white_count)
1472 break;
1473 while (*p != '\0' && p < end)
1474 ++p;
1475 }
1476 }
1477 whites[i] = NULL;
1478
1479 /* The list of commandline macros should be very short.
1480 Accept the N*M complexity. */
1481 for (macro_item * m = macros_user; m; m = m->next) if (m->command_line)
1482 {
1483 found = FALSE;
1484 for (uschar ** w = whites; *w; ++w)
1485 if (Ustrcmp(*w, m->name) == 0)
1486 {
1487 found = TRUE;
1488 break;
1489 }
1490 if (!found)
1491 return FALSE;
1492 if (!m->replacement)
1493 continue;
1494 if ((len = m->replen) == 0)
1495 continue;
1496 n = pcre_exec(regex_whitelisted_macro, NULL, CS m->replacement, len,
1497 0, PCRE_EOPT, NULL, 0);
1498 if (n < 0)
1499 {
1500 if (n != PCRE_ERROR_NOMATCH)
1501 debug_printf("macros_trusted checking %s returned %d\n", m->name, n);
1502 return FALSE;
1503 }
1504 }
1505 DEBUG(D_any) debug_printf("macros_trusted overridden to true by whitelisting\n");
1506 return TRUE;
1507 #endif
1508 }
1509
1510
1511 /*************************************************
1512 * Expansion testing *
1513 *************************************************/
1514
1515 /* Expand and print one item, doing macro-processing.
1516
1517 Arguments:
1518 item line for expansion
1519 */
1520
1521 static void
1522 expansion_test_line(uschar * line)
1523 {
1524 int len;
1525 BOOL dummy_macexp;
1526
1527 Ustrncpy(big_buffer, line, big_buffer_size);
1528 big_buffer[big_buffer_size-1] = '\0';
1529 len = Ustrlen(big_buffer);
1530
1531 (void) macros_expand(0, &len, &dummy_macexp);
1532
1533 if (isupper(big_buffer[0]))
1534 {
1535 if (macro_read_assignment(big_buffer))
1536 printf("Defined macro '%s'\n", mlast->name);
1537 }
1538 else
1539 if ((line = expand_string(big_buffer))) printf("%s\n", CS line);
1540 else printf("Failed: %s\n", expand_string_message);
1541 }
1542
1543
1544
1545 /*************************************************
1546 * Entry point and high-level code *
1547 *************************************************/
1548
1549 /* Entry point for the Exim mailer. Analyse the arguments and arrange to take
1550 the appropriate action. All the necessary functions are present in the one
1551 binary. I originally thought one should split it up, but it turns out that so
1552 much of the apparatus is needed in each chunk that one might as well just have
1553 it all available all the time, which then makes the coding easier as well.
1554
1555 Arguments:
1556 argc count of entries in argv
1557 argv argument strings, with argv[0] being the program name
1558
1559 Returns: EXIT_SUCCESS if terminated successfully
1560 EXIT_FAILURE otherwise, except when a message has been sent
1561 to the sender, and -oee was given
1562 */
1563
1564 int
1565 main(int argc, char **cargv)
1566 {
1567 uschar **argv = USS cargv;
1568 int arg_receive_timeout = -1;
1569 int arg_smtp_receive_timeout = -1;
1570 int arg_error_handling = error_handling;
1571 int filter_sfd = -1;
1572 int filter_ufd = -1;
1573 int group_count;
1574 int i, rv;
1575 int list_queue_option = 0;
1576 int msg_action = 0;
1577 int msg_action_arg = -1;
1578 int namelen = (argv[0] == NULL)? 0 : Ustrlen(argv[0]);
1579 int queue_only_reason = 0;
1580 #ifdef EXIM_PERL
1581 int perl_start_option = 0;
1582 #endif
1583 int recipients_arg = argc;
1584 int sender_address_domain = 0;
1585 int test_retry_arg = -1;
1586 int test_rewrite_arg = -1;
1587 gid_t original_egid;
1588 BOOL arg_queue_only = FALSE;
1589 BOOL bi_option = FALSE;
1590 BOOL checking = FALSE;
1591 BOOL count_queue = FALSE;
1592 BOOL expansion_test = FALSE;
1593 BOOL extract_recipients = FALSE;
1594 BOOL flag_G = FALSE;
1595 BOOL flag_n = FALSE;
1596 BOOL forced_delivery = FALSE;
1597 BOOL f_end_dot = FALSE;
1598 BOOL deliver_give_up = FALSE;
1599 BOOL list_queue = FALSE;
1600 BOOL list_options = FALSE;
1601 BOOL list_config = FALSE;
1602 BOOL local_queue_only;
1603 BOOL more = TRUE;
1604 BOOL one_msg_action = FALSE;
1605 BOOL opt_D_used = FALSE;
1606 BOOL queue_only_set = FALSE;
1607 BOOL receiving_message = TRUE;
1608 BOOL sender_ident_set = FALSE;
1609 BOOL session_local_queue_only;
1610 BOOL unprivileged;
1611 BOOL removed_privilege = FALSE;
1612 BOOL usage_wanted = FALSE;
1613 BOOL verify_address_mode = FALSE;
1614 BOOL verify_as_sender = FALSE;
1615 BOOL version_printed = FALSE;
1616 uschar *alias_arg = NULL;
1617 uschar *called_as = US"";
1618 uschar *cmdline_syslog_name = NULL;
1619 uschar *start_queue_run_id = NULL;
1620 uschar *stop_queue_run_id = NULL;
1621 uschar *expansion_test_message = NULL;
1622 uschar *ftest_domain = NULL;
1623 uschar *ftest_localpart = NULL;
1624 uschar *ftest_prefix = NULL;
1625 uschar *ftest_suffix = NULL;
1626 uschar *log_oneline = NULL;
1627 uschar *malware_test_file = NULL;
1628 uschar *real_sender_address;
1629 uschar *originator_home = US"/";
1630 size_t sz;
1631 rmark reset_point;
1632
1633 struct passwd *pw;
1634 struct stat statbuf;
1635 pid_t passed_qr_pid = (pid_t)0;
1636 int passed_qr_pipe = -1;
1637 gid_t group_list[EXIM_GROUPLIST_SIZE];
1638
1639 /* For the -bI: flag */
1640 enum commandline_info info_flag = CMDINFO_NONE;
1641 BOOL info_stdout = FALSE;
1642
1643 /* Possible options for -R and -S */
1644
1645 static uschar *rsopts[] = { US"f", US"ff", US"r", US"rf", US"rff" };
1646
1647 /* Need to define this in case we need to change the environment in order
1648 to get rid of a bogus time zone. We have to make it char rather than uschar
1649 because some OS define it in /usr/include/unistd.h. */
1650
1651 extern char **environ;
1652
1653 #ifdef MEASURE_TIMING
1654 (void)gettimeofday(&timestamp_startup, NULL);
1655 #endif
1656
1657 /* If the Exim user and/or group and/or the configuration file owner/group were
1658 defined by ref:name at build time, we must now find the actual uid/gid values.
1659 This is a feature to make the lives of binary distributors easier. */
1660
1661 #ifdef EXIM_USERNAME
1662 if (route_finduser(US EXIM_USERNAME, &pw, &exim_uid))
1663 {
1664 if (exim_uid == 0)
1665 exim_fail("exim: refusing to run with uid 0 for \"%s\"\n", EXIM_USERNAME);
1666
1667 /* If ref:name uses a number as the name, route_finduser() returns
1668 TRUE with exim_uid set and pw coerced to NULL. */
1669 if (pw)
1670 exim_gid = pw->pw_gid;
1671 #ifndef EXIM_GROUPNAME
1672 else
1673 exim_fail(
1674 "exim: ref:name should specify a usercode, not a group.\n"
1675 "exim: can't let you get away with it unless you also specify a group.\n");
1676 #endif
1677 }
1678 else
1679 exim_fail("exim: failed to find uid for user name \"%s\"\n", EXIM_USERNAME);
1680 #endif
1681
1682 #ifdef EXIM_GROUPNAME
1683 if (!route_findgroup(US EXIM_GROUPNAME, &exim_gid))
1684 exim_fail("exim: failed to find gid for group name \"%s\"\n", EXIM_GROUPNAME);
1685 #endif
1686
1687 #ifdef CONFIGURE_OWNERNAME
1688 if (!route_finduser(US CONFIGURE_OWNERNAME, NULL, &config_uid))
1689 exim_fail("exim: failed to find uid for user name \"%s\"\n",
1690 CONFIGURE_OWNERNAME);
1691 #endif
1692
1693 /* We default the system_filter_user to be the Exim run-time user, as a
1694 sane non-root value. */
1695 system_filter_uid = exim_uid;
1696
1697 #ifdef CONFIGURE_GROUPNAME
1698 if (!route_findgroup(US CONFIGURE_GROUPNAME, &config_gid))
1699 exim_fail("exim: failed to find gid for group name \"%s\"\n",
1700 CONFIGURE_GROUPNAME);
1701 #endif
1702
1703 /* In the Cygwin environment, some initialization used to need doing.
1704 It was fudged in by means of this macro; now no longer but we'll leave
1705 it in case of others. */
1706
1707 #ifdef OS_INIT
1708 OS_INIT
1709 #endif
1710
1711 /* Check a field which is patched when we are running Exim within its
1712 testing harness; do a fast initial check, and then the whole thing. */
1713
1714 f.running_in_test_harness =
1715 *running_status == '<' && Ustrcmp(running_status, "<<<testing>>>") == 0;
1716 if (f.running_in_test_harness)
1717 debug_store = TRUE;
1718
1719 /* The C standard says that the equivalent of setlocale(LC_ALL, "C") is obeyed
1720 at the start of a program; however, it seems that some environments do not
1721 follow this. A "strange" locale can affect the formatting of timestamps, so we
1722 make quite sure. */
1723
1724 setlocale(LC_ALL, "C");
1725
1726 /* Get the offset between CLOCK_MONOTONIC and wallclock */
1727
1728 #ifdef _POSIX_MONOTONIC_CLOCK
1729 exim_clock_init();
1730 #endif
1731
1732 /* Set up the default handler for timing using alarm(). */
1733
1734 os_non_restarting_signal(SIGALRM, sigalrm_handler);
1735
1736 /* Ensure we have a buffer for constructing log entries. Use malloc directly,
1737 because store_malloc writes a log entry on failure. */
1738
1739 if (!(log_buffer = US malloc(LOG_BUFFER_SIZE)))
1740 exim_fail("exim: failed to get store for log buffer\n");
1741
1742 /* Initialize the default log options. */
1743
1744 bits_set(log_selector, log_selector_size, log_default);
1745
1746 /* Set log_stderr to stderr, provided that stderr exists. This gets reset to
1747 NULL when the daemon is run and the file is closed. We have to use this
1748 indirection, because some systems don't allow writing to the variable "stderr".
1749 */
1750
1751 if (fstat(fileno(stderr), &statbuf) >= 0) log_stderr = stderr;
1752
1753 /* Arrange for the PCRE regex library to use our store functions. Note that
1754 the normal calls are actually macros that add additional arguments for
1755 debugging purposes so we have to assign specially constructed functions here.
1756 The default is to use store in the stacking pool, but this is overridden in the
1757 regex_must_compile() function. */
1758
1759 pcre_malloc = function_store_get;
1760 pcre_free = function_dummy_free;
1761
1762 /* Ensure there is a big buffer for temporary use in several places. It is put
1763 in malloc store so that it can be freed for enlargement if necessary. */
1764
1765 big_buffer = store_malloc(big_buffer_size);
1766
1767 /* Set up the handler for the data request signal, and set the initial
1768 descriptive text. */
1769
1770 process_info = store_get(PROCESS_INFO_SIZE, TRUE); /* tainted */
1771 set_process_info("initializing");
1772 os_restarting_signal(SIGUSR1, usr1_handler);
1773
1774 /* If running in a dockerized environment, the TERM signal is only
1775 delegated to the PID 1 if we request it by setting an signal handler */
1776 if (getpid() == 1) signal(SIGTERM, term_handler);
1777
1778 /* SIGHUP is used to get the daemon to reconfigure. It gets set as appropriate
1779 in the daemon code. For the rest of Exim's uses, we ignore it. */
1780
1781 signal(SIGHUP, SIG_IGN);
1782
1783 /* We don't want to die on pipe errors as the code is written to handle
1784 the write error instead. */
1785
1786 signal(SIGPIPE, SIG_IGN);
1787
1788 /* Under some circumstance on some OS, Exim can get called with SIGCHLD
1789 set to SIG_IGN. This causes subprocesses that complete before the parent
1790 process waits for them not to hang around, so when Exim calls wait(), nothing
1791 is there. The wait() code has been made robust against this, but let's ensure
1792 that SIGCHLD is set to SIG_DFL, because it's tidier to wait and get a process
1793 ending status. We use sigaction rather than plain signal() on those OS where
1794 SA_NOCLDWAIT exists, because we want to be sure it is turned off. (There was a
1795 problem on AIX with this.) */
1796
1797 #ifdef SA_NOCLDWAIT
1798 {
1799 struct sigaction act;
1800 act.sa_handler = SIG_DFL;
1801 sigemptyset(&(act.sa_mask));
1802 act.sa_flags = 0;
1803 sigaction(SIGCHLD, &act, NULL);
1804 }
1805 #else
1806 signal(SIGCHLD, SIG_DFL);
1807 #endif
1808
1809 /* Save the arguments for use if we re-exec exim as a daemon after receiving
1810 SIGHUP. */
1811
1812 sighup_argv = argv;
1813
1814 /* Set up the version number. Set up the leading 'E' for the external form of
1815 message ids, set the pointer to the internal form, and initialize it to
1816 indicate no message being processed. */
1817
1818 version_init();
1819 message_id_option[0] = '-';
1820 message_id_external = message_id_option + 1;
1821 message_id_external[0] = 'E';
1822 message_id = message_id_external + 1;
1823 message_id[0] = 0;
1824
1825 /* Set the umask to zero so that any files Exim creates using open() are
1826 created with the modes that it specifies. NOTE: Files created with fopen() have
1827 a problem, which was not recognized till rather late (February 2006). With this
1828 umask, such files will be world writeable. (They are all content scanning files
1829 in the spool directory, which isn't world-accessible, so this is not a
1830 disaster, but it's untidy.) I don't want to change this overall setting,
1831 however, because it will interact badly with the open() calls. Instead, there's
1832 now a function called modefopen() that fiddles with the umask while calling
1833 fopen(). */
1834
1835 (void)umask(0);
1836
1837 /* Precompile the regular expression for matching a message id. Keep this in
1838 step with the code that generates ids in the accept.c module. We need to do
1839 this here, because the -M options check their arguments for syntactic validity
1840 using mac_ismsgid, which uses this. */
1841
1842 regex_ismsgid =
1843 regex_must_compile(US"^(?:[^\\W_]{6}-){2}[^\\W_]{2}$", FALSE, TRUE);
1844
1845 /* Precompile the regular expression that is used for matching an SMTP error
1846 code, possibly extended, at the start of an error message. Note that the
1847 terminating whitespace character is included. */
1848
1849 regex_smtp_code =
1850 regex_must_compile(US"^\\d\\d\\d\\s(?:\\d\\.\\d\\d?\\d?\\.\\d\\d?\\d?\\s)?",
1851 FALSE, TRUE);
1852
1853 #ifdef WHITELIST_D_MACROS
1854 /* Precompile the regular expression used to filter the content of macros
1855 given to -D for permissibility. */
1856
1857 regex_whitelisted_macro =
1858 regex_must_compile(US"^[A-Za-z0-9_/.-]*$", FALSE, TRUE);
1859 #endif
1860
1861 for (i = 0; i < REGEX_VARS; i++) regex_vars[i] = NULL;
1862
1863 /* If the program is called as "mailq" treat it as equivalent to "exim -bp";
1864 this seems to be a generally accepted convention, since one finds symbolic
1865 links called "mailq" in standard OS configurations. */
1866
1867 if ((namelen == 5 && Ustrcmp(argv[0], "mailq") == 0) ||
1868 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/mailq", 6) == 0))
1869 {
1870 list_queue = TRUE;
1871 receiving_message = FALSE;
1872 called_as = US"-mailq";
1873 }
1874
1875 /* If the program is called as "rmail" treat it as equivalent to
1876 "exim -i -oee", thus allowing UUCP messages to be input using non-SMTP mode,
1877 i.e. preventing a single dot on a line from terminating the message, and
1878 returning with zero return code, even in cases of error (provided an error
1879 message has been sent). */
1880
1881 if ((namelen == 5 && Ustrcmp(argv[0], "rmail") == 0) ||
1882 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/rmail", 6) == 0))
1883 {
1884 f.dot_ends = FALSE;
1885 called_as = US"-rmail";
1886 errors_sender_rc = EXIT_SUCCESS;
1887 }
1888
1889 /* If the program is called as "rsmtp" treat it as equivalent to "exim -bS";
1890 this is a smail convention. */
1891
1892 if ((namelen == 5 && Ustrcmp(argv[0], "rsmtp") == 0) ||
1893 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/rsmtp", 6) == 0))
1894 {
1895 smtp_input = smtp_batched_input = TRUE;
1896 called_as = US"-rsmtp";
1897 }
1898
1899 /* If the program is called as "runq" treat it as equivalent to "exim -q";
1900 this is a smail convention. */
1901
1902 if ((namelen == 4 && Ustrcmp(argv[0], "runq") == 0) ||
1903 (namelen > 4 && Ustrncmp(argv[0] + namelen - 5, "/runq", 5) == 0))
1904 {
1905 queue_interval = 0;
1906 receiving_message = FALSE;
1907 called_as = US"-runq";
1908 }
1909
1910 /* If the program is called as "newaliases" treat it as equivalent to
1911 "exim -bi"; this is a sendmail convention. */
1912
1913 if ((namelen == 10 && Ustrcmp(argv[0], "newaliases") == 0) ||
1914 (namelen > 10 && Ustrncmp(argv[0] + namelen - 11, "/newaliases", 11) == 0))
1915 {
1916 bi_option = TRUE;
1917 receiving_message = FALSE;
1918 called_as = US"-newaliases";
1919 }
1920
1921 /* Save the original effective uid for a couple of uses later. It should
1922 normally be root, but in some esoteric environments it may not be. */
1923
1924 original_euid = geteuid();
1925 original_egid = getegid();
1926
1927 /* Get the real uid and gid. If the caller is root, force the effective uid/gid
1928 to be the same as the real ones. This makes a difference only if Exim is setuid
1929 (or setgid) to something other than root, which could be the case in some
1930 special configurations. */
1931
1932 real_uid = getuid();
1933 real_gid = getgid();
1934
1935 if (real_uid == root_uid)
1936 {
1937 if ((rv = setgid(real_gid)))
1938 exim_fail("exim: setgid(%ld) failed: %s\n",
1939 (long int)real_gid, strerror(errno));
1940 if ((rv = setuid(real_uid)))
1941 exim_fail("exim: setuid(%ld) failed: %s\n",
1942 (long int)real_uid, strerror(errno));
1943 }
1944
1945 /* If neither the original real uid nor the original euid was root, Exim is
1946 running in an unprivileged state. */
1947
1948 unprivileged = (real_uid != root_uid && original_euid != root_uid);
1949
1950 /* Scan the program's arguments. Some can be dealt with right away; others are
1951 simply recorded for checking and handling afterwards. Do a high-level switch
1952 on the second character (the one after '-'), to save some effort. */
1953
1954 for (i = 1; i < argc; i++)
1955 {
1956 BOOL badarg = FALSE;
1957 uschar *arg = argv[i];
1958 uschar *argrest;
1959 int switchchar;
1960
1961 /* An argument not starting with '-' is the start of a recipients list;
1962 break out of the options-scanning loop. */
1963
1964 if (arg[0] != '-')
1965 {
1966 recipients_arg = i;
1967 break;
1968 }
1969
1970 /* An option consisting of -- terminates the options */
1971
1972 if (Ustrcmp(arg, "--") == 0)
1973 {
1974 recipients_arg = i + 1;
1975 break;
1976 }
1977
1978 /* Handle flagged options */
1979
1980 switchchar = arg[1];
1981 argrest = arg+2;
1982
1983 /* Make all -ex options synonymous with -oex arguments, since that
1984 is assumed by various callers. Also make -qR options synonymous with -R
1985 options, as that seems to be required as well. Allow for -qqR too, and
1986 the same for -S options. */
1987
1988 if (Ustrncmp(arg+1, "oe", 2) == 0 ||
1989 Ustrncmp(arg+1, "qR", 2) == 0 ||
1990 Ustrncmp(arg+1, "qS", 2) == 0)
1991 {
1992 switchchar = arg[2];
1993 argrest++;
1994 }
1995 else if (Ustrncmp(arg+1, "qqR", 3) == 0 || Ustrncmp(arg+1, "qqS", 3) == 0)
1996 {
1997 switchchar = arg[3];
1998 argrest += 2;
1999 f.queue_2stage = TRUE;
2000 }
2001
2002 /* Make -r synonymous with -f, since it is a documented alias */
2003
2004 else if (arg[1] == 'r') switchchar = 'f';
2005
2006 /* Make -ov synonymous with -v */
2007
2008 else if (Ustrcmp(arg, "-ov") == 0)
2009 {
2010 switchchar = 'v';
2011 argrest++;
2012 }
2013
2014 /* deal with --option_aliases */
2015 else if (switchchar == '-')
2016 {
2017 if (Ustrcmp(argrest, "help") == 0)
2018 {
2019 usage_wanted = TRUE;
2020 break;
2021 }
2022 else if (Ustrcmp(argrest, "version") == 0)
2023 {
2024 switchchar = 'b';
2025 argrest = US"V";
2026 }
2027 }
2028
2029 /* High-level switch on active initial letter */
2030
2031 switch(switchchar)
2032 {
2033
2034 /* sendmail uses -Ac and -Am to control which .cf file is used;
2035 we ignore them. */
2036 case 'A':
2037 if (*argrest == '\0') { badarg = TRUE; break; }
2038 else
2039 {
2040 BOOL ignore = FALSE;
2041 switch (*argrest)
2042 {
2043 case 'c':
2044 case 'm':
2045 if (*(argrest + 1) == '\0')
2046 ignore = TRUE;
2047 break;
2048 }
2049 if (!ignore) badarg = TRUE;
2050 }
2051 break;
2052
2053 /* -Btype is a sendmail option for 7bit/8bit setting. Exim is 8-bit clean
2054 so has no need of it. */
2055
2056 case 'B':
2057 if (!*argrest) i++; /* Skip over the type */
2058 break;
2059
2060
2061 case 'b':
2062 {
2063 receiving_message = FALSE; /* Reset TRUE for -bm, -bS, -bs below */
2064
2065 switch (*argrest++)
2066 {
2067 /* -bd: Run in daemon mode, awaiting SMTP connections.
2068 -bdf: Ditto, but in the foreground.
2069 */
2070 case 'd':
2071 f.daemon_listen = TRUE;
2072 if (*argrest == 'f') f.background_daemon = FALSE;
2073 else if (*argrest) badarg = TRUE;
2074 break;
2075
2076 /* -be: Run in expansion test mode
2077 -bem: Ditto, but read a message from a file first
2078 */
2079 case 'e':
2080 expansion_test = checking = TRUE;
2081 if (*argrest == 'm')
2082 {
2083 if (++i >= argc) { badarg = TRUE; break; }
2084 expansion_test_message = argv[i];
2085 argrest++;
2086 }
2087 if (*argrest) badarg = TRUE;
2088 break;
2089
2090 /* -bF: Run system filter test */
2091 case 'F':
2092 filter_test |= checking = FTEST_SYSTEM;
2093 if (*argrest) { badarg = TRUE; break; }
2094 if (++i < argc) filter_test_sfile = argv[i]; else
2095 exim_fail("exim: file name expected after %s\n", argv[i-1]);
2096 break;
2097
2098 /* -bf: Run user filter test
2099 -bfd: Set domain for filter testing
2100 -bfl: Set local part for filter testing
2101 -bfp: Set prefix for filter testing
2102 -bfs: Set suffix for filter testing
2103 */
2104 case 'f':
2105 if (!*argrest)
2106 {
2107 filter_test |= checking = FTEST_USER;
2108 if (++i < argc) filter_test_ufile = argv[i];
2109 else exim_fail("exim: file name expected after %s\n", argv[i-1]);
2110 }
2111 else
2112 {
2113 if (++i >= argc)
2114 exim_fail("exim: string expected after %s\n", arg);
2115 if (Ustrcmp(argrest, "d") == 0) ftest_domain = argv[i];
2116 else if (Ustrcmp(argrest, "l") == 0) ftest_localpart = argv[i];
2117 else if (Ustrcmp(argrest, "p") == 0) ftest_prefix = argv[i];
2118 else if (Ustrcmp(argrest, "s") == 0) ftest_suffix = argv[i];
2119 else badarg = TRUE;
2120 }
2121 break;
2122
2123 /* -bh: Host checking - an IP address must follow. */
2124 case 'h':
2125 if (!*argrest || Ustrcmp(argrest, "c") == 0)
2126 {
2127 if (++i >= argc) { badarg = TRUE; break; }
2128 sender_host_address = argv[i];
2129 host_checking = checking = f.log_testing_mode = TRUE;
2130 f.host_checking_callout = *argrest == 'c';
2131 message_logs = FALSE;
2132 }
2133 else badarg = TRUE;
2134 break;
2135
2136 /* -bi: This option is used by sendmail to initialize *the* alias file,
2137 though it has the -oA option to specify a different file. Exim has no
2138 concept of *the* alias file, but since Sun's YP make script calls
2139 sendmail this way, some support must be provided. */
2140 case 'i':
2141 if (!*++argrest) bi_option = TRUE;
2142 else badarg = TRUE;
2143 break;
2144
2145 /* -bI: provide information, of the type to follow after a colon.
2146 This is an Exim flag. */
2147 case 'I':
2148 if (Ustrlen(argrest) >= 1 && *argrest == ':')
2149 {
2150 uschar *p = argrest+1;
2151 info_flag = CMDINFO_HELP;
2152 if (Ustrlen(p))
2153 if (strcmpic(p, CUS"sieve") == 0)
2154 {
2155 info_flag = CMDINFO_SIEVE;
2156 info_stdout = TRUE;
2157 }
2158 else if (strcmpic(p, CUS"dscp") == 0)
2159 {
2160 info_flag = CMDINFO_DSCP;
2161 info_stdout = TRUE;
2162 }
2163 else if (strcmpic(p, CUS"help") == 0)
2164 info_stdout = TRUE;
2165 }
2166 else badarg = TRUE;
2167 break;
2168
2169 /* -bm: Accept and deliver message - the default option. Reinstate
2170 receiving_message, which got turned off for all -b options.
2171 -bmalware: test the filename given for malware */
2172 case 'm':
2173 if (!*argrest) receiving_message = TRUE;
2174 else if (Ustrcmp(argrest, "alware") == 0)
2175 {
2176 if (++i >= argc) { badarg = TRUE; break; }
2177 checking = TRUE;
2178 malware_test_file = argv[i];
2179 }
2180 else badarg = TRUE;
2181 break;
2182
2183 /* -bnq: For locally originating messages, do not qualify unqualified
2184 addresses. In the envelope, this causes errors; in header lines they
2185 just get left. */
2186 case 'n':
2187 if (Ustrcmp(argrest, "q") == 0)
2188 {
2189 f.allow_unqualified_sender = FALSE;
2190 f.allow_unqualified_recipient = FALSE;
2191 }
2192 else badarg = TRUE;
2193 break;
2194
2195 /* -bpxx: List the contents of the mail queue, in various forms. If
2196 the option is -bpc, just a queue count is needed. Otherwise, if the
2197 first letter after p is r, then order is random. */
2198 case 'p':
2199 if (*argrest == 'c')
2200 {
2201 count_queue = TRUE;
2202 if (*++argrest) badarg = TRUE;
2203 break;
2204 }
2205
2206 if (*argrest == 'r')
2207 {
2208 list_queue_option = 8;
2209 argrest++;
2210 }
2211 else list_queue_option = 0;
2212
2213 list_queue = TRUE;
2214
2215 /* -bp: List the contents of the mail queue, top-level only */
2216
2217 if (!*argrest) {}
2218
2219 /* -bpu: List the contents of the mail queue, top-level undelivered */
2220
2221 else if (Ustrcmp(argrest, "u") == 0) list_queue_option += 1;
2222
2223 /* -bpa: List the contents of the mail queue, including all delivered */
2224
2225 else if (Ustrcmp(argrest, "a") == 0) list_queue_option += 2;
2226
2227 /* Unknown after -bp[r] */
2228
2229 else badarg = TRUE;
2230 break;
2231
2232
2233 /* -bP: List the configuration variables given as the address list.
2234 Force -v, so configuration errors get displayed. */
2235 case 'P':
2236
2237 /* -bP config: we need to setup here, because later,
2238 * when list_options is checked, the config is read already */
2239 if (*argrest)
2240 badarg = TRUE;
2241 else if (argv[i+1] && Ustrcmp(argv[i+1], "config") == 0)
2242 {
2243 list_config = TRUE;
2244 readconf_save_config(version_string);
2245 }
2246 else
2247 {
2248 list_options = TRUE;
2249 debug_selector |= D_v;
2250 debug_file = stderr;
2251 }
2252 break;
2253
2254 /* -brt: Test retry configuration lookup */
2255 case 'r':
2256 if (Ustrcmp(argrest, "t") == 0)
2257 {
2258 checking = TRUE;
2259 test_retry_arg = i + 1;
2260 goto END_ARG;
2261 }
2262
2263 /* -brw: Test rewrite configuration */
2264
2265 else if (Ustrcmp(argrest, "w") == 0)
2266 {
2267 checking = TRUE;
2268 test_rewrite_arg = i + 1;
2269 goto END_ARG;
2270 }
2271 else badarg = TRUE;
2272 break;
2273
2274 /* -bS: Read SMTP commands on standard input, but produce no replies -
2275 all errors are reported by sending messages. */
2276 case 'S':
2277 if (!*argrest)
2278 smtp_input = smtp_batched_input = receiving_message = TRUE;
2279 else badarg = TRUE;
2280 break;
2281
2282 /* -bs: Read SMTP commands on standard input and produce SMTP replies
2283 on standard output. */
2284 case 's':
2285 if (!*argrest) smtp_input = receiving_message = TRUE;
2286 else badarg = TRUE;
2287 break;
2288
2289 /* -bt: address testing mode */
2290 case 't':
2291 if (!*argrest)
2292 f.address_test_mode = checking = f.log_testing_mode = TRUE;
2293 else badarg = TRUE;
2294 break;
2295
2296 /* -bv: verify addresses */
2297 case 'v':
2298 if (!*argrest)
2299 verify_address_mode = checking = f.log_testing_mode = TRUE;
2300
2301 /* -bvs: verify sender addresses */
2302
2303 else if (Ustrcmp(argrest, "s") == 0)
2304 {
2305 verify_address_mode = checking = f.log_testing_mode = TRUE;
2306 verify_as_sender = TRUE;
2307 }
2308 else badarg = TRUE;
2309 break;
2310
2311 /* -bV: Print version string and support details */
2312 case 'V':
2313 if (!*argrest)
2314 {
2315 printf("Exim version %s #%s built %s\n", version_string,
2316 version_cnumber, version_date);
2317 printf("%s\n", CS version_copyright);
2318 version_printed = TRUE;
2319 show_whats_supported(stdout);
2320 f.log_testing_mode = TRUE;
2321 }
2322 else badarg = TRUE;
2323 break;
2324
2325 /* -bw: inetd wait mode, accept a listening socket as stdin */
2326 case 'w':
2327 f.inetd_wait_mode = TRUE;
2328 f.background_daemon = FALSE;
2329 f.daemon_listen = TRUE;
2330 if (*argrest)
2331 if ((inetd_wait_timeout = readconf_readtime(argrest, 0, FALSE)) <= 0)
2332 exim_fail("exim: bad time value %s: abandoned\n", argv[i]);
2333 break;
2334
2335 default:
2336 badarg = TRUE;
2337 break;
2338 }
2339 break;
2340 }
2341
2342
2343 /* -C: change configuration file list; ignore if it isn't really
2344 a change! Enforce a prefix check if required. */
2345
2346 case 'C':
2347 if (*argrest == 0)
2348 {
2349 if(++i < argc) argrest = argv[i]; else
2350 { badarg = TRUE; break; }
2351 }
2352 if (Ustrcmp(config_main_filelist, argrest) != 0)
2353 {
2354 #ifdef ALT_CONFIG_PREFIX
2355 int sep = 0;
2356 int len = Ustrlen(ALT_CONFIG_PREFIX);
2357 const uschar *list = argrest;
2358 uschar *filename;
2359 while((filename = string_nextinlist(&list, &sep, big_buffer,
2360 big_buffer_size)) != NULL)
2361 {
2362 if ((Ustrlen(filename) < len ||
2363 Ustrncmp(filename, ALT_CONFIG_PREFIX, len) != 0 ||
2364 Ustrstr(filename, "/../") != NULL) &&
2365 (Ustrcmp(filename, "/dev/null") != 0 || real_uid != root_uid))
2366 exim_fail("-C Permission denied\n");
2367 }
2368 #endif
2369 if (real_uid != root_uid)
2370 {
2371 #ifdef TRUSTED_CONFIG_LIST
2372
2373 if (real_uid != exim_uid
2374 #ifdef CONFIGURE_OWNER
2375 && real_uid != config_uid
2376 #endif
2377 )
2378 f.trusted_config = FALSE;
2379 else
2380 {
2381 FILE *trust_list = Ufopen(TRUSTED_CONFIG_LIST, "rb");
2382 if (trust_list)
2383 {
2384 struct stat statbuf;
2385
2386 if (fstat(fileno(trust_list), &statbuf) != 0 ||
2387 (statbuf.st_uid != root_uid /* owner not root */
2388 #ifdef CONFIGURE_OWNER
2389 && statbuf.st_uid != config_uid /* owner not the special one */
2390 #endif
2391 ) || /* or */
2392 (statbuf.st_gid != root_gid /* group not root */
2393 #ifdef CONFIGURE_GROUP
2394 && statbuf.st_gid != config_gid /* group not the special one */
2395 #endif
2396 && (statbuf.st_mode & 020) != 0 /* group writeable */
2397 ) || /* or */
2398 (statbuf.st_mode & 2) != 0) /* world writeable */
2399 {
2400 f.trusted_config = FALSE;
2401 fclose(trust_list);
2402 }
2403 else
2404 {
2405 /* Well, the trust list at least is up to scratch... */
2406 rmark reset_point = store_mark();
2407 uschar *trusted_configs[32];
2408 int nr_configs = 0;
2409 int i = 0;
2410
2411 while (Ufgets(big_buffer, big_buffer_size, trust_list))
2412 {
2413 uschar *start = big_buffer, *nl;
2414 while (*start && isspace(*start))
2415 start++;
2416 if (*start != '/')
2417 continue;
2418 nl = Ustrchr(start, '\n');
2419 if (nl)
2420 *nl = 0;
2421 trusted_configs[nr_configs++] = string_copy(start);
2422 if (nr_configs == 32)
2423 break;
2424 }
2425 fclose(trust_list);
2426
2427 if (nr_configs)
2428 {
2429 int sep = 0;
2430 const uschar *list = argrest;
2431 uschar *filename;
2432 while (f.trusted_config && (filename = string_nextinlist(&list,
2433 &sep, big_buffer, big_buffer_size)) != NULL)
2434 {
2435 for (i=0; i < nr_configs; i++)
2436 if (Ustrcmp(filename, trusted_configs[i]) == 0)
2437 break;
2438 if (i == nr_configs)
2439 {
2440 f.trusted_config = FALSE;
2441 break;
2442 }
2443 }
2444 }
2445 else /* No valid prefixes found in trust_list file. */
2446 f.trusted_config = FALSE;
2447 store_reset(reset_point);
2448 }
2449 }
2450 else /* Could not open trust_list file. */
2451 f.trusted_config = FALSE;
2452 }
2453 #else
2454 /* Not root; don't trust config */
2455 f.trusted_config = FALSE;
2456 #endif
2457 }
2458
2459 config_main_filelist = argrest;
2460 f.config_changed = TRUE;
2461 }
2462 break;
2463
2464
2465 /* -D: set up a macro definition */
2466
2467 case 'D':
2468 #ifdef DISABLE_D_OPTION
2469 exim_fail("exim: -D is not available in this Exim binary\n");
2470 #else
2471 {
2472 int ptr = 0;
2473 macro_item *m;
2474 uschar name[24];
2475 uschar *s = argrest;
2476
2477 opt_D_used = TRUE;
2478 while (isspace(*s)) s++;
2479
2480 if (*s < 'A' || *s > 'Z')
2481 exim_fail("exim: macro name set by -D must start with "
2482 "an upper case letter\n");
2483
2484 while (isalnum(*s) || *s == '_')
2485 {
2486 if (ptr < sizeof(name)-1) name[ptr++] = *s;
2487 s++;
2488 }
2489 name[ptr] = 0;
2490 if (ptr == 0) { badarg = TRUE; break; }
2491 while (isspace(*s)) s++;
2492 if (*s != 0)
2493 {
2494 if (*s++ != '=') { badarg = TRUE; break; }
2495 while (isspace(*s)) s++;
2496 }
2497
2498 for (m = macros_user; m; m = m->next)
2499 if (Ustrcmp(m->name, name) == 0)
2500 exim_fail("exim: duplicated -D in command line\n");
2501
2502 m = macro_create(name, s, TRUE);
2503
2504 if (clmacro_count >= MAX_CLMACROS)
2505 exim_fail("exim: too many -D options on command line\n");
2506 clmacros[clmacro_count++] =
2507 string_sprintf("-D%s=%s", m->name, m->replacement);
2508 }
2509 #endif
2510 break;
2511
2512 /* -d: Set debug level (see also -v below) or set the drop_cr option.
2513 The latter is now a no-op, retained for compatibility only. If -dd is used,
2514 debugging subprocesses of the daemon is disabled. */
2515
2516 case 'd':
2517 if (Ustrcmp(argrest, "ropcr") == 0)
2518 {
2519 /* drop_cr = TRUE; */
2520 }
2521
2522 /* Use an intermediate variable so that we don't set debugging while
2523 decoding the debugging bits. */
2524
2525 else
2526 {
2527 unsigned int selector = D_default;
2528 debug_selector = 0;
2529 debug_file = NULL;
2530 if (*argrest == 'd')
2531 {
2532 f.debug_daemon = TRUE;
2533 argrest++;
2534 }
2535 if (*argrest != 0)
2536 decode_bits(&selector, 1, debug_notall, argrest,
2537 debug_options, debug_options_count, US"debug", 0);
2538 debug_selector = selector;
2539 }
2540 break;
2541
2542
2543 /* -E: This is a local error message. This option is not intended for
2544 external use at all, but is not restricted to trusted callers because it
2545 does no harm (just suppresses certain error messages) and if Exim is run
2546 not setuid root it won't always be trusted when it generates error
2547 messages using this option. If there is a message id following -E, point
2548 message_reference at it, for logging. */
2549
2550 case 'E':
2551 f.local_error_message = TRUE;
2552 if (mac_ismsgid(argrest)) message_reference = argrest;
2553 break;
2554
2555
2556 /* -ex: The vacation program calls sendmail with the undocumented "-eq"
2557 option, so it looks as if historically the -oex options are also callable
2558 without the leading -o. So we have to accept them. Before the switch,
2559 anything starting -oe has been converted to -e. Exim does not support all
2560 of the sendmail error options. */
2561
2562 case 'e':
2563 if (Ustrcmp(argrest, "e") == 0)
2564 {
2565 arg_error_handling = ERRORS_SENDER;
2566 errors_sender_rc = EXIT_SUCCESS;
2567 }
2568 else if (Ustrcmp(argrest, "m") == 0) arg_error_handling = ERRORS_SENDER;
2569 else if (Ustrcmp(argrest, "p") == 0) arg_error_handling = ERRORS_STDERR;
2570 else if (Ustrcmp(argrest, "q") == 0) arg_error_handling = ERRORS_STDERR;
2571 else if (Ustrcmp(argrest, "w") == 0) arg_error_handling = ERRORS_SENDER;
2572 else badarg = TRUE;
2573 break;
2574
2575
2576 /* -F: Set sender's full name, used instead of the gecos entry from
2577 the password file. Since users can usually alter their gecos entries,
2578 there's no security involved in using this instead. The data can follow
2579 the -F or be in the next argument. */
2580
2581 case 'F':
2582 if (*argrest == 0)
2583 {
2584 if(++i < argc) argrest = argv[i]; else
2585 { badarg = TRUE; break; }
2586 }
2587 originator_name = argrest;
2588 f.sender_name_forced = TRUE;
2589 break;
2590
2591
2592 /* -f: Set sender's address - this value is only actually used if Exim is
2593 run by a trusted user, or if untrusted_set_sender is set and matches the
2594 address, except that the null address can always be set by any user. The
2595 test for this happens later, when the value given here is ignored when not
2596 permitted. For an untrusted user, the actual sender is still put in Sender:
2597 if it doesn't match the From: header (unless no_local_from_check is set).
2598 The data can follow the -f or be in the next argument. The -r switch is an
2599 obsolete form of -f but since there appear to be programs out there that
2600 use anything that sendmail has ever supported, better accept it - the
2601 synonymizing is done before the switch above.
2602
2603 At this stage, we must allow domain literal addresses, because we don't
2604 know what the setting of allow_domain_literals is yet. Ditto for trailing
2605 dots and strip_trailing_dot. */
2606
2607 case 'f':
2608 {
2609 int dummy_start, dummy_end;
2610 uschar *errmess;
2611 if (*argrest == 0)
2612 {
2613 if (i+1 < argc) argrest = argv[++i]; else
2614 { badarg = TRUE; break; }
2615 }
2616 if (*argrest == 0)
2617 *(sender_address = store_get(1, FALSE)) = '\0'; /* Ensure writeable memory */
2618 else
2619 {
2620 uschar *temp = argrest + Ustrlen(argrest) - 1;
2621 while (temp >= argrest && isspace(*temp)) temp--;
2622 if (temp >= argrest && *temp == '.') f_end_dot = TRUE;
2623 allow_domain_literals = TRUE;
2624 strip_trailing_dot = TRUE;
2625 #ifdef SUPPORT_I18N
2626 allow_utf8_domains = TRUE;
2627 #endif
2628 sender_address = parse_extract_address(argrest, &errmess,
2629 &dummy_start, &dummy_end, &sender_address_domain, TRUE);
2630 sender_address = string_copy_taint(sender_address, TRUE);
2631 #ifdef SUPPORT_I18N
2632 message_smtputf8 = string_is_utf8(sender_address);
2633 allow_utf8_domains = FALSE;
2634 #endif
2635 allow_domain_literals = FALSE;
2636 strip_trailing_dot = FALSE;
2637 if (!sender_address)
2638 exim_fail("exim: bad -f address \"%s\": %s\n", argrest, errmess);
2639 }
2640 f.sender_address_forced = TRUE;
2641 }
2642 break;
2643
2644 /* -G: sendmail invocation to specify that it's a gateway submission and
2645 sendmail may complain about problems instead of fixing them.
2646 We make it equivalent to an ACL "control = suppress_local_fixups" and do
2647 not at this time complain about problems. */
2648
2649 case 'G':
2650 flag_G = TRUE;
2651 break;
2652
2653 /* -h: Set the hop count for an incoming message. Exim does not currently
2654 support this; it always computes it by counting the Received: headers.
2655 To put it in will require a change to the spool header file format. */
2656
2657 case 'h':
2658 if (*argrest == 0)
2659 {
2660 if(++i < argc) argrest = argv[i]; else
2661 { badarg = TRUE; break; }
2662 }
2663 if (!isdigit(*argrest)) badarg = TRUE;
2664 break;
2665
2666
2667 /* -i: Set flag so dot doesn't end non-SMTP input (same as -oi, seems
2668 not to be documented for sendmail but mailx (at least) uses it) */
2669
2670 case 'i':
2671 if (*argrest == 0) f.dot_ends = FALSE; else badarg = TRUE;
2672 break;
2673
2674
2675 /* -L: set the identifier used for syslog; equivalent to setting
2676 syslog_processname in the config file, but needs to be an admin option. */
2677
2678 case 'L':
2679 if (*argrest == '\0')
2680 {
2681 if(++i < argc) argrest = argv[i]; else
2682 { badarg = TRUE; break; }
2683 }
2684 if ((sz = Ustrlen(argrest)) > 32)
2685 exim_fail("exim: the -L syslog name is too long: \"%s\"\n", argrest);
2686 if (sz < 1)
2687 exim_fail("exim: the -L syslog name is too short\n");
2688 cmdline_syslog_name = argrest;
2689 break;
2690
2691 case 'M':
2692 receiving_message = FALSE;
2693
2694 /* -MC: continue delivery of another message via an existing open
2695 file descriptor. This option is used for an internal call by the
2696 smtp transport when there is a pending message waiting to go to an
2697 address to which it has got a connection. Five subsequent arguments are
2698 required: transport name, host name, IP address, sequence number, and
2699 message_id. Transports may decline to create new processes if the sequence
2700 number gets too big. The channel is stdin. This (-MC) must be the last
2701 argument. There's a subsequent check that the real-uid is privileged.
2702
2703 If we are running in the test harness. delay for a bit, to let the process
2704 that set this one up complete. This makes for repeatability of the logging,
2705 etc. output. */
2706
2707 if (Ustrcmp(argrest, "C") == 0)
2708 {
2709 union sockaddr_46 interface_sock;
2710 EXIM_SOCKLEN_T size = sizeof(interface_sock);
2711
2712 if (argc != i + 6)
2713 exim_fail("exim: too many or too few arguments after -MC\n");
2714
2715 if (msg_action_arg >= 0)
2716 exim_fail("exim: incompatible arguments\n");
2717
2718 continue_transport = argv[++i];
2719 continue_hostname = argv[++i];
2720 continue_host_address = argv[++i];
2721 continue_sequence = Uatoi(argv[++i]);
2722 msg_action = MSG_DELIVER;
2723 msg_action_arg = ++i;
2724 forced_delivery = TRUE;
2725 queue_run_pid = passed_qr_pid;
2726 queue_run_pipe = passed_qr_pipe;
2727
2728 if (!mac_ismsgid(argv[i]))
2729 exim_fail("exim: malformed message id %s after -MC option\n",
2730 argv[i]);
2731
2732 /* Set up $sending_ip_address and $sending_port, unless proxied */
2733
2734 if (!continue_proxy_cipher)
2735 if (getsockname(fileno(stdin), (struct sockaddr *)(&interface_sock),
2736 &size) == 0)
2737 sending_ip_address = host_ntoa(-1, &interface_sock, NULL,
2738 &sending_port);
2739 else
2740 exim_fail("exim: getsockname() failed after -MC option: %s\n",
2741 strerror(errno));
2742
2743 testharness_pause_ms(500);
2744 break;
2745 }
2746
2747 else if (*argrest == 'C' && argrest[1] && !argrest[2])
2748 {
2749 switch(argrest[1])
2750 {
2751 /* -MCA: set the smtp_authenticated flag; this is useful only when it
2752 precedes -MC (see above). The flag indicates that the host to which
2753 Exim is connected has accepted an AUTH sequence. */
2754
2755 case 'A': f.smtp_authenticated = TRUE; break;
2756
2757 /* -MCD: set the smtp_use_dsn flag; this indicates that the host
2758 that exim is connected to supports the esmtp extension DSN */
2759
2760 case 'D': smtp_peer_options |= OPTION_DSN; break;
2761
2762 /* -MCG: set the queue name, to a non-default value */
2763
2764 case 'G': if (++i < argc) queue_name = string_copy(argv[i]);
2765 else badarg = TRUE;
2766 break;
2767
2768 /* -MCK: the peer offered CHUNKING. Must precede -MC */
2769
2770 case 'K': smtp_peer_options |= OPTION_CHUNKING; break;
2771
2772 /* -MCP: set the smtp_use_pipelining flag; this is useful only when
2773 it preceded -MC (see above) */
2774
2775 case 'P': smtp_peer_options |= OPTION_PIPE; break;
2776
2777 /* -MCQ: pass on the pid of the queue-running process that started
2778 this chain of deliveries and the fd of its synchronizing pipe; this
2779 is useful only when it precedes -MC (see above) */
2780
2781 case 'Q': if (++i < argc) passed_qr_pid = (pid_t)(Uatol(argv[i]));
2782 else badarg = TRUE;
2783 if (++i < argc) passed_qr_pipe = (int)(Uatol(argv[i]));
2784 else badarg = TRUE;
2785 break;
2786
2787 /* -MCS: set the smtp_use_size flag; this is useful only when it
2788 precedes -MC (see above) */
2789
2790 case 'S': smtp_peer_options |= OPTION_SIZE; break;
2791
2792 #ifndef DISABLE_TLS
2793 /* -MCt: similar to -MCT below but the connection is still open
2794 via a proxy process which handles the TLS context and coding.
2795 Require three arguments for the proxied local address and port,
2796 and the TLS cipher. */
2797
2798 case 't': if (++i < argc) sending_ip_address = argv[i];
2799 else badarg = TRUE;
2800 if (++i < argc) sending_port = (int)(Uatol(argv[i]));
2801 else badarg = TRUE;
2802 if (++i < argc) continue_proxy_cipher = argv[i];
2803 else badarg = TRUE;
2804 /*FALLTHROUGH*/
2805
2806 /* -MCT: set the tls_offered flag; this is useful only when it
2807 precedes -MC (see above). The flag indicates that the host to which
2808 Exim is connected has offered TLS support. */
2809
2810 case 'T': smtp_peer_options |= OPTION_TLS; break;
2811 #endif
2812
2813 default: badarg = TRUE; break;
2814 }
2815 break;
2816 }
2817
2818 /* -M[x]: various operations on the following list of message ids:
2819 -M deliver the messages, ignoring next retry times and thawing
2820 -Mc deliver the messages, checking next retry times, no thawing
2821 -Mf freeze the messages
2822 -Mg give up on the messages
2823 -Mt thaw the messages
2824 -Mrm remove the messages
2825 In the above cases, this must be the last option. There are also the
2826 following options which are followed by a single message id, and which
2827 act on that message. Some of them use the "recipient" addresses as well.
2828 -Mar add recipient(s)
2829 -Mmad mark all recipients delivered
2830 -Mmd mark recipients(s) delivered
2831 -Mes edit sender
2832 -Mset load a message for use with -be
2833 -Mvb show body
2834 -Mvc show copy (of whole message, in RFC 2822 format)
2835 -Mvh show header
2836 -Mvl show log
2837 */
2838
2839 else if (*argrest == 0)
2840 {
2841 msg_action = MSG_DELIVER;
2842 forced_delivery = f.deliver_force_thaw = TRUE;
2843 }
2844 else if (Ustrcmp(argrest, "ar") == 0)
2845 {
2846 msg_action = MSG_ADD_RECIPIENT;
2847 one_msg_action = TRUE;
2848 }
2849 else if (Ustrcmp(argrest, "c") == 0) msg_action = MSG_DELIVER;
2850 else if (Ustrcmp(argrest, "es") == 0)
2851 {
2852 msg_action = MSG_EDIT_SENDER;
2853 one_msg_action = TRUE;
2854 }
2855 else if (Ustrcmp(argrest, "f") == 0) msg_action = MSG_FREEZE;
2856 else if (Ustrcmp(argrest, "g") == 0)
2857 {
2858 msg_action = MSG_DELIVER;
2859 deliver_give_up = TRUE;
2860 }
2861 else if (Ustrcmp(argrest, "G") == 0)
2862 {
2863 msg_action = MSG_SETQUEUE;
2864 queue_name_dest = argv[++i];
2865 }
2866 else if (Ustrcmp(argrest, "mad") == 0)
2867 {
2868 msg_action = MSG_MARK_ALL_DELIVERED;
2869 }
2870 else if (Ustrcmp(argrest, "md") == 0)
2871 {
2872 msg_action = MSG_MARK_DELIVERED;
2873 one_msg_action = TRUE;
2874 }
2875 else if (Ustrcmp(argrest, "rm") == 0) msg_action = MSG_REMOVE;
2876 else if (Ustrcmp(argrest, "set") == 0)
2877 {
2878 msg_action = MSG_LOAD;
2879 one_msg_action = TRUE;
2880 }
2881 else if (Ustrcmp(argrest, "t") == 0) msg_action = MSG_THAW;
2882 else if (Ustrcmp(argrest, "vb") == 0)
2883 {
2884 msg_action = MSG_SHOW_BODY;
2885 one_msg_action = TRUE;
2886 }
2887 else if (Ustrcmp(argrest, "vc") == 0)
2888 {
2889 msg_action = MSG_SHOW_COPY;
2890 one_msg_action = TRUE;
2891 }
2892 else if (Ustrcmp(argrest, "vh") == 0)
2893 {
2894 msg_action = MSG_SHOW_HEADER;
2895 one_msg_action = TRUE;
2896 }
2897 else if (Ustrcmp(argrest, "vl") == 0)
2898 {
2899 msg_action = MSG_SHOW_LOG;
2900 one_msg_action = TRUE;
2901 }
2902 else { badarg = TRUE; break; }
2903
2904 /* All the -Mxx options require at least one message id. */
2905
2906 msg_action_arg = i + 1;
2907 if (msg_action_arg >= argc)
2908 exim_fail("exim: no message ids given after %s option\n", arg);
2909
2910 /* Some require only message ids to follow */
2911
2912 if (!one_msg_action)
2913 {
2914 for (int j = msg_action_arg; j < argc; j++) if (!mac_ismsgid(argv[j]))
2915 exim_fail("exim: malformed message id %s after %s option\n",
2916 argv[j], arg);
2917 goto END_ARG; /* Remaining args are ids */
2918 }
2919
2920 /* Others require only one message id, possibly followed by addresses,
2921 which will be handled as normal arguments. */
2922
2923 else
2924 {
2925 if (!mac_ismsgid(argv[msg_action_arg]))
2926 exim_fail("exim: malformed message id %s after %s option\n",
2927 argv[msg_action_arg], arg);
2928 i++;
2929 }
2930 break;
2931
2932
2933 /* Some programs seem to call the -om option without the leading o;
2934 for sendmail it askes for "me too". Exim always does this. */
2935
2936 case 'm':
2937 if (*argrest != 0) badarg = TRUE;
2938 break;
2939
2940
2941 /* -N: don't do delivery - a debugging option that stops transports doing
2942 their thing. It implies debugging at the D_v level. */
2943
2944 case 'N':
2945 if (*argrest == 0)
2946 {
2947 f.dont_deliver = TRUE;
2948 debug_selector |= D_v;
2949 debug_file = stderr;
2950 }
2951 else badarg = TRUE;
2952 break;
2953
2954
2955 /* -n: This means "don't alias" in sendmail, apparently.
2956 For normal invocations, it has no effect.
2957 It may affect some other options. */
2958
2959 case 'n':
2960 flag_n = TRUE;
2961 break;
2962
2963 /* -O: Just ignore it. In sendmail, apparently -O option=value means set
2964 option to the specified value. This form uses long names. We need to handle
2965 -O option=value and -Ooption=value. */
2966
2967 case 'O':
2968 if (*argrest == 0)
2969 if (++i >= argc)
2970 exim_fail("exim: string expected after -O\n");
2971 break;
2972
2973 case 'o':
2974 switch (*argrest++)
2975 {
2976 /* -oA: Set an argument for the bi command (sendmail's "alternate alias
2977 file" option). */
2978 case 'A':
2979 if (!*(alias_arg = argrest))
2980 if (i+1 < argc) alias_arg = argv[++i];
2981 else exim_fail("exim: string expected after -oA\n");
2982 break;
2983
2984 /* -oB: Set a connection message max value for remote deliveries */
2985 case 'B':
2986 {
2987 uschar * p = argrest;
2988 if (!*p)
2989 if (i+1 < argc && isdigit((argv[i+1][0])))
2990 p = argv[++i];
2991 else
2992 {
2993 connection_max_messages = 1;
2994 p = NULL;
2995 }
2996
2997 if (p)
2998 {
2999 if (!isdigit(*p))
3000 exim_fail("exim: number expected after -oB\n");
3001 connection_max_messages = Uatoi(p);
3002 }
3003 }
3004 break;
3005
3006 /* -odb: background delivery */
3007
3008 case 'd':
3009 if (Ustrcmp(argrest, "b") == 0)
3010 {
3011 f.synchronous_delivery = FALSE;
3012 arg_queue_only = FALSE;
3013 queue_only_set = TRUE;
3014 }
3015
3016 /* -odd: testsuite-only: add no inter-process delays */
3017
3018 else if (Ustrcmp(argrest, "d") == 0)
3019 f.testsuite_delays = FALSE;
3020
3021 /* -odf: foreground delivery (smail-compatible option); same effect as
3022 -odi: interactive (synchronous) delivery (sendmail-compatible option)
3023 */
3024
3025 else if (Ustrcmp(argrest, "f") == 0 || Ustrcmp(argrest, "i") == 0)
3026 {
3027 f.synchronous_delivery = TRUE;
3028 arg_queue_only = FALSE;
3029 queue_only_set = TRUE;
3030 }
3031
3032 /* -odq: queue only */
3033
3034 else if (Ustrcmp(argrest, "q") == 0)
3035 {
3036 f.synchronous_delivery = FALSE;
3037 arg_queue_only = TRUE;
3038 queue_only_set = TRUE;
3039 }
3040
3041 /* -odqs: queue SMTP only - do local deliveries and remote routing,
3042 but no remote delivery */
3043
3044 else if (Ustrcmp(argrest, "qs") == 0)
3045 {
3046 f.queue_smtp = TRUE;
3047 arg_queue_only = FALSE;
3048 queue_only_set = TRUE;
3049 }
3050 else badarg = TRUE;
3051 break;
3052
3053 /* -oex: Sendmail error flags. As these are also accepted without the
3054 leading -o prefix, for compatibility with vacation and other callers,
3055 they are handled with -e above. */
3056
3057 /* -oi: Set flag so dot doesn't end non-SMTP input (same as -i)
3058 -oitrue: Another sendmail syntax for the same */
3059
3060 case 'i':
3061 if (!*argrest || Ustrcmp(argrest, "true") == 0)
3062 f.dot_ends = FALSE;
3063 else badarg = TRUE;
3064 break;
3065
3066 /* -oM*: Set various characteristics for an incoming message; actually
3067 acted on for trusted callers only. */
3068
3069 case 'M':
3070 {
3071 if (i+1 >= argc)
3072 exim_fail("exim: data expected after -oM%s\n", argrest);
3073
3074 /* -oMa: Set sender host address */
3075
3076 if (Ustrcmp(argrest, "a") == 0) sender_host_address = argv[++i];
3077
3078 /* -oMaa: Set authenticator name */
3079
3080 else if (Ustrcmp(argrest, "aa") == 0)
3081 sender_host_authenticated = argv[++i];
3082
3083 /* -oMas: setting authenticated sender */
3084
3085 else if (Ustrcmp(argrest, "as") == 0)
3086 authenticated_sender = string_copy_taint(argv[++i], TRUE);
3087
3088 /* -oMai: setting authenticated id */
3089
3090 else if (Ustrcmp(argrest, "ai") == 0)
3091 authenticated_id = string_copy_taint(argv[++i], TRUE);
3092
3093 /* -oMi: Set incoming interface address */
3094
3095 else if (Ustrcmp(argrest, "i") == 0) interface_address = argv[++i];
3096
3097 /* -oMm: Message reference */
3098
3099 else if (Ustrcmp(argrest, "m") == 0)
3100 {
3101 if (!mac_ismsgid(argv[i+1]))
3102 exim_fail("-oMm must be a valid message ID\n");
3103 if (!f.trusted_config)
3104 exim_fail("-oMm must be called by a trusted user/config\n");
3105 message_reference = argv[++i];
3106 }
3107
3108 /* -oMr: Received protocol */
3109
3110 else if (Ustrcmp(argrest, "r") == 0)
3111
3112 if (received_protocol)
3113 exim_fail("received_protocol is set already\n");
3114 else
3115 received_protocol = argv[++i];
3116
3117 /* -oMs: Set sender host name */
3118
3119 else if (Ustrcmp(argrest, "s") == 0)
3120 sender_host_name = string_copy_taint(argv[++i], TRUE);
3121
3122 /* -oMt: Set sender ident */
3123
3124 else if (Ustrcmp(argrest, "t") == 0)
3125 {
3126 sender_ident_set = TRUE;
3127 sender_ident = argv[++i];
3128 }
3129
3130 /* Else a bad argument */
3131
3132 else
3133 badarg = TRUE;
3134 }
3135 break;
3136
3137 /* -om: Me-too flag for aliases. Exim always does this. Some programs
3138 seem to call this as -m (undocumented), so that is also accepted (see
3139 above). */
3140 /* -oo: An ancient flag for old-style addresses which still seems to
3141 crop up in some calls (see in SCO). */
3142
3143 case 'm':
3144 case 'o':
3145 if (*argrest) badarg = TRUE;
3146 break;
3147
3148 /* -oP <name>: set pid file path for daemon
3149 -oPX: delete pid file of daemon */
3150
3151 case 'P':
3152 if (!*argrest) override_pid_file_path = argv[++i];
3153 else if (Ustrcmp(argrest, "X") == 0) delete_pid_file();
3154 else badarg = TRUE;
3155 break;
3156
3157
3158 /* -or <n>: set timeout for non-SMTP acceptance
3159 -os <n>: set timeout for SMTP acceptance */
3160
3161 case 'r':
3162 case 's':
3163 {
3164 int * tp = argrest[-1] == 'r'
3165 ? &arg_receive_timeout : &arg_smtp_receive_timeout;
3166 if (*argrest)
3167 *tp = readconf_readtime(argrest, 0, FALSE);
3168 else if (i+1 < argc)
3169 *tp = readconf_readtime(argv[++i], 0, FALSE);
3170
3171 if (*tp < 0)
3172 exim_fail("exim: bad time value %s: abandoned\n", argv[i]);
3173 }
3174 break;
3175
3176 /* -oX <list>: Override local_interfaces and/or default daemon ports */
3177
3178 case 'X':
3179 if (*argrest) badarg = TRUE;
3180 else override_local_interfaces = argv[++i];
3181 break;
3182
3183 /* Unknown -o argument */
3184
3185 default:
3186 badarg = TRUE;
3187 }
3188 break;
3189
3190
3191 /* -ps: force Perl startup; -pd force delayed Perl startup */
3192
3193 case 'p':
3194 #ifdef EXIM_PERL
3195 if (*argrest == 's' && argrest[1] == 0)
3196 {
3197 perl_start_option = 1;
3198 break;
3199 }
3200 if (*argrest == 'd' && argrest[1] == 0)
3201 {
3202 perl_start_option = -1;
3203 break;
3204 }
3205 #endif
3206
3207 /* -panythingelse is taken as the Sendmail-compatible argument -prval:sval,
3208 which sets the host protocol and host name */
3209
3210 if (*argrest == 0)
3211 if (i+1 < argc)
3212 argrest = argv[++i];
3213 else
3214 { badarg = TRUE; break; }
3215
3216 if (*argrest != 0)
3217 {
3218 uschar *hn;
3219
3220 if (received_protocol)
3221 exim_fail("received_protocol is set already\n");
3222
3223 hn = Ustrchr(argrest, ':');
3224 if (hn == NULL)
3225 received_protocol = argrest;
3226 else
3227 {
3228 int old_pool = store_pool;
3229 store_pool = POOL_PERM;
3230 received_protocol = string_copyn(argrest, hn - argrest);
3231 store_pool = old_pool;
3232 sender_host_name = hn + 1;
3233 }
3234 }
3235 break;
3236
3237
3238 case 'q':
3239 receiving_message = FALSE;
3240 if (queue_interval >= 0)
3241 exim_fail("exim: -q specified more than once\n");
3242
3243 /* -qq...: Do queue runs in a 2-stage manner */
3244
3245 if (*argrest == 'q')
3246 {
3247 f.queue_2stage = TRUE;
3248 argrest++;
3249 }
3250
3251 /* -qi...: Do only first (initial) deliveries */
3252
3253 if (*argrest == 'i')
3254 {
3255 f.queue_run_first_delivery = TRUE;
3256 argrest++;
3257 }
3258
3259 /* -qf...: Run the queue, forcing deliveries
3260 -qff..: Ditto, forcing thawing as well */
3261
3262 if (*argrest == 'f')
3263 {
3264 f.queue_run_force = TRUE;
3265 if (*++argrest == 'f')
3266 {
3267 f.deliver_force_thaw = TRUE;
3268 argrest++;
3269 }
3270 }
3271
3272 /* -q[f][f]l...: Run the queue only on local deliveries */
3273
3274 if (*argrest == 'l')
3275 {
3276 f.queue_run_local = TRUE;
3277 argrest++;
3278 }
3279
3280 /* -q[f][f][l][G<name>]... Work on the named queue */
3281
3282 if (*argrest == 'G')
3283 {
3284 int i;
3285 for (argrest++, i = 0; argrest[i] && argrest[i] != '/'; ) i++;
3286 queue_name = string_copyn(argrest, i);
3287 argrest += i;
3288 if (*argrest == '/') argrest++;
3289 }
3290
3291 /* -q[f][f][l][G<name>]: Run the queue, optionally forced, optionally local
3292 only, optionally named, optionally starting from a given message id. */
3293
3294 if (!(list_queue || count_queue))
3295 if (*argrest == 0
3296 && (i + 1 >= argc || argv[i+1][0] == '-' || mac_ismsgid(argv[i+1])))
3297 {
3298 queue_interval = 0;
3299 if (i+1 < argc && mac_ismsgid(argv[i+1]))
3300 start_queue_run_id = argv[++i];
3301 if (i+1 < argc && mac_ismsgid(argv[i+1]))
3302 stop_queue_run_id = argv[++i];
3303 }
3304
3305 /* -q[f][f][l][G<name>/]<n>: Run the queue at regular intervals, optionally
3306 forced, optionally local only, optionally named. */
3307
3308 else if ((queue_interval = readconf_readtime(*argrest ? argrest : argv[++i],
3309 0, FALSE)) <= 0)
3310 exim_fail("exim: bad time value %s: abandoned\n", argv[i]);
3311 break;
3312
3313
3314 case 'R': /* Synonymous with -qR... */
3315 receiving_message = FALSE;
3316
3317 /* -Rf: As -R (below) but force all deliveries,
3318 -Rff: Ditto, but also thaw all frozen messages,
3319 -Rr: String is regex
3320 -Rrf: Regex and force
3321 -Rrff: Regex and force and thaw
3322
3323 in all cases provided there are no further characters in this
3324 argument. */
3325
3326 if (*argrest != 0)
3327 for (int i = 0; i < nelem(rsopts); i++)
3328 if (Ustrcmp(argrest, rsopts[i]) == 0)
3329 {
3330 if (i != 2) f.queue_run_force = TRUE;
3331 if (i >= 2) f.deliver_selectstring_regex = TRUE;
3332 if (i == 1 || i == 4) f.deliver_force_thaw = TRUE;
3333 argrest += Ustrlen(rsopts[i]);
3334 }
3335
3336 /* -R: Set string to match in addresses for forced queue run to
3337 pick out particular messages. */
3338
3339 if (*argrest)
3340 deliver_selectstring = argrest;
3341 else if (i+1 < argc)
3342 deliver_selectstring = argv[++i];
3343 else
3344 exim_fail("exim: string expected after -R\n");
3345 break;
3346
3347
3348 /* -r: an obsolete synonym for -f (see above) */
3349
3350
3351 /* -S: Like -R but works on sender. */
3352
3353 case 'S': /* Synonymous with -qS... */
3354 receiving_message = FALSE;
3355
3356 /* -Sf: As -S (below) but force all deliveries,
3357 -Sff: Ditto, but also thaw all frozen messages,
3358 -Sr: String is regex
3359 -Srf: Regex and force
3360 -Srff: Regex and force and thaw
3361
3362 in all cases provided there are no further characters in this
3363 argument. */
3364
3365 if (*argrest)
3366 for (int i = 0; i < nelem(rsopts); i++)
3367 if (Ustrcmp(argrest, rsopts[i]) == 0)
3368 {
3369 if (i != 2) f.queue_run_force = TRUE;
3370 if (i >= 2) f.deliver_selectstring_sender_regex = TRUE;
3371 if (i == 1 || i == 4) f.deliver_force_thaw = TRUE;
3372 argrest += Ustrlen(rsopts[i]);
3373 }
3374
3375 /* -S: Set string to match in addresses for forced queue run to
3376 pick out particular messages. */
3377
3378 if (*argrest)
3379 deliver_selectstring_sender = argrest;
3380 else if (i+1 < argc)
3381 deliver_selectstring_sender = argv[++i];
3382 else
3383 exim_fail("exim: string expected after -S\n");
3384 break;
3385
3386 /* -Tqt is an option that is exclusively for use by the testing suite.
3387 It is not recognized in other circumstances. It allows for the setting up
3388 of explicit "queue times" so that various warning/retry things can be
3389 tested. Otherwise variability of clock ticks etc. cause problems. */
3390
3391 case 'T':
3392 if (f.running_in_test_harness && Ustrcmp(argrest, "qt") == 0)
3393 fudged_queue_times = argv[++i];
3394 else badarg = TRUE;
3395 break;
3396
3397
3398 /* -t: Set flag to extract recipients from body of message. */
3399
3400 case 't':
3401 if (*argrest == 0) extract_recipients = TRUE;
3402
3403 /* -ti: Set flag to extract recipients from body of message, and also
3404 specify that dot does not end the message. */
3405
3406 else if (Ustrcmp(argrest, "i") == 0)
3407 {
3408 extract_recipients = TRUE;
3409 f.dot_ends = FALSE;
3410 }
3411
3412 /* -tls-on-connect: don't wait for STARTTLS (for old clients) */
3413
3414 #ifndef DISABLE_TLS
3415 else if (Ustrcmp(argrest, "ls-on-connect") == 0) tls_in.on_connect = TRUE;
3416 #endif
3417
3418 else badarg = TRUE;
3419 break;
3420
3421
3422 /* -U: This means "initial user submission" in sendmail, apparently. The
3423 doc claims that in future sendmail may refuse syntactically invalid
3424 messages instead of fixing them. For the moment, we just ignore it. */
3425
3426 case 'U':
3427 break;
3428
3429
3430 /* -v: verify things - this is a very low-level debugging */
3431
3432 case 'v':
3433 if (*argrest == 0)
3434 {
3435 debug_selector |= D_v;
3436 debug_file = stderr;
3437 }
3438 else badarg = TRUE;
3439 break;
3440
3441
3442 /* -x: AIX uses this to indicate some fancy 8-bit character stuff:
3443
3444 The -x flag tells the sendmail command that mail from a local
3445 mail program has National Language Support (NLS) extended characters
3446 in the body of the mail item. The sendmail command can send mail with
3447 extended NLS characters across networks that normally corrupts these
3448 8-bit characters.
3449
3450 As Exim is 8-bit clean, it just ignores this flag. */
3451
3452 case 'x':
3453 if (*argrest != 0) badarg = TRUE;
3454 break;
3455
3456 /* -X: in sendmail: takes one parameter, logfile, and sends debugging
3457 logs to that file. We swallow the parameter and otherwise ignore it. */
3458
3459 case 'X':
3460 if (*argrest == '\0')
3461 if (++i >= argc)
3462 exim_fail("exim: string expected after -X\n");
3463 break;
3464
3465 case 'z':
3466 if (*argrest == '\0')
3467 if (++i < argc)
3468 log_oneline = argv[i];
3469 else
3470 exim_fail("exim: file name expected after %s\n", argv[i-1]);
3471 break;
3472
3473 /* All other initial characters are errors */
3474
3475 default:
3476 badarg = TRUE;
3477 break;
3478 } /* End of high-level switch statement */
3479
3480 /* Failed to recognize the option, or syntax error */
3481
3482 if (badarg)
3483 exim_fail("exim abandoned: unknown, malformed, or incomplete "
3484 "option %s\n", arg);
3485 }
3486
3487
3488 /* If -R or -S have been specified without -q, assume a single queue run. */
3489
3490 if ( (deliver_selectstring || deliver_selectstring_sender)
3491 && queue_interval < 0)
3492 queue_interval = 0;
3493
3494
3495 END_ARG:
3496 /* If usage_wanted is set we call the usage function - which never returns */
3497 if (usage_wanted) exim_usage(called_as);
3498
3499 /* Arguments have been processed. Check for incompatibilities. */
3500 if ((
3501 (smtp_input || extract_recipients || recipients_arg < argc) &&
3502 (f.daemon_listen || queue_interval >= 0 || bi_option ||
3503 test_retry_arg >= 0 || test_rewrite_arg >= 0 ||
3504 filter_test != FTEST_NONE || (msg_action_arg > 0 && !one_msg_action))
3505 ) ||
3506 (
3507 msg_action_arg > 0 &&
3508 (f.daemon_listen || queue_interval > 0 || list_options ||
3509 (checking && msg_action != MSG_LOAD) ||
3510 bi_option || test_retry_arg >= 0 || test_rewrite_arg >= 0)
3511 ) ||
3512 (
3513 (f.daemon_listen || queue_interval > 0) &&
3514 (sender_address != NULL || list_options || list_queue || checking ||
3515 bi_option)
3516 ) ||
3517 (
3518 f.daemon_listen && queue_interval == 0
3519 ) ||
3520 (
3521 f.inetd_wait_mode && queue_interval >= 0
3522 ) ||
3523 (
3524 list_options &&
3525 (checking || smtp_input || extract_recipients ||
3526 filter_test != FTEST_NONE || bi_option)
3527 ) ||
3528 (
3529 verify_address_mode &&
3530 (f.address_test_mode || smtp_input || extract_recipients ||
3531 filter_test != FTEST_NONE || bi_option)
3532 ) ||
3533 (
3534 f.address_test_mode && (smtp_input || extract_recipients ||
3535 filter_test != FTEST_NONE || bi_option)
3536 ) ||
3537 (
3538 smtp_input && (sender_address != NULL || filter_test != FTEST_NONE ||
3539 extract_recipients)
3540 ) ||
3541 (
3542 deliver_selectstring != NULL && queue_interval < 0
3543 ) ||
3544 (
3545 msg_action == MSG_LOAD &&
3546 (!expansion_test || expansion_test_message != NULL)
3547 )
3548 )
3549 exim_fail("exim: incompatible command-line options or arguments\n");
3550
3551 /* If debugging is set up, set the file and the file descriptor to pass on to
3552 child processes. It should, of course, be 2 for stderr. Also, force the daemon
3553 to run in the foreground. */
3554
3555 if (debug_selector != 0)
3556 {
3557 debug_file = stderr;
3558 debug_fd = fileno(debug_file);
3559 f.background_daemon = FALSE;
3560 testharness_pause_ms(100); /* lets caller finish */
3561 if (debug_selector != D_v) /* -v only doesn't show this */
3562 {
3563 debug_printf("Exim version %s uid=%ld gid=%ld pid=%d D=%x\n",
3564 version_string, (long int)real_uid, (long int)real_gid, (int)getpid(),
3565 debug_selector);
3566 if (!version_printed)
3567 show_whats_supported(stderr);
3568 }
3569 }
3570
3571 /* When started with root privilege, ensure that the limits on the number of
3572 open files and the number of processes (where that is accessible) are
3573 sufficiently large, or are unset, in case Exim has been called from an
3574 environment where the limits are screwed down. Not all OS have the ability to
3575 change some of these limits. */
3576
3577 if (unprivileged)
3578 {
3579 DEBUG(D_any) debug_print_ids(US"Exim has no root privilege:");
3580 }
3581 else
3582 {
3583 struct rlimit rlp;
3584
3585 #ifdef RLIMIT_NOFILE
3586 if (getrlimit(RLIMIT_NOFILE, &rlp) < 0)
3587 {
3588 log_write(0, LOG_MAIN|LOG_PANIC, "getrlimit(RLIMIT_NOFILE) failed: %s",
3589 strerror(errno));
3590 rlp.rlim_cur = rlp.rlim_max = 0;
3591 }
3592
3593 /* I originally chose 1000 as a nice big number that was unlikely to
3594 be exceeded. It turns out that some older OS have a fixed upper limit of
3595 256. */
3596
3597 if (rlp.rlim_cur < 1000)
3598 {
3599 rlp.rlim_cur = rlp.rlim_max = 1000;
3600 if (setrlimit(RLIMIT_NOFILE, &rlp) < 0)
3601 {
3602 rlp.rlim_cur = rlp.rlim_max = 256;
3603 if (setrlimit(RLIMIT_NOFILE, &rlp) < 0)
3604 log_write(0, LOG_MAIN|LOG_PANIC, "setrlimit(RLIMIT_NOFILE) failed: %s",
3605 strerror(errno));
3606 }
3607 }
3608 #endif
3609
3610 #ifdef RLIMIT_NPROC
3611 if (getrlimit(RLIMIT_NPROC, &rlp) < 0)
3612 {
3613 log_write(0, LOG_MAIN|LOG_PANIC, "getrlimit(RLIMIT_NPROC) failed: %s",
3614 strerror(errno));
3615 rlp.rlim_cur = rlp.rlim_max = 0;
3616 }
3617
3618 #ifdef RLIM_INFINITY
3619 if (rlp.rlim_cur != RLIM_INFINITY && rlp.rlim_cur < 1000)
3620 {
3621 rlp.rlim_cur = rlp.rlim_max = RLIM_INFINITY;
3622 #else
3623 if (rlp.rlim_cur < 1000)
3624 {
3625 rlp.rlim_cur = rlp.rlim_max = 1000;
3626 #endif
3627 if (setrlimit(RLIMIT_NPROC, &rlp) < 0)
3628 log_write(0, LOG_MAIN|LOG_PANIC, "setrlimit(RLIMIT_NPROC) failed: %s",
3629 strerror(errno));
3630 }
3631 #endif
3632 }
3633
3634 /* Exim is normally entered as root (but some special configurations are
3635 possible that don't do this). However, it always spins off sub-processes that
3636 set their uid and gid as required for local delivery. We don't want to pass on
3637 any extra groups that root may belong to, so we want to get rid of them all at
3638 this point.
3639
3640 We need to obey setgroups() at this stage, before possibly giving up root
3641 privilege for a changed configuration file, but later on we might need to
3642 check on the additional groups for the admin user privilege - can't do that
3643 till after reading the config, which might specify the exim gid. Therefore,
3644 save the group list here first. */
3645
3646 if ((group_count = getgroups(nelem(group_list), group_list)) < 0)
3647 exim_fail("exim: getgroups() failed: %s\n", strerror(errno));
3648
3649 /* There is a fundamental difference in some BSD systems in the matter of
3650 groups. FreeBSD and BSDI are known to be different; NetBSD and OpenBSD are
3651 known not to be different. On the "different" systems there is a single group
3652 list, and the first entry in it is the current group. On all other versions of
3653 Unix there is a supplementary group list, which is in *addition* to the current
3654 group. Consequently, to get rid of all extraneous groups on a "standard" system
3655 you pass over 0 groups to setgroups(), while on a "different" system you pass
3656 over a single group - the current group, which is always the first group in the
3657 list. Calling setgroups() with zero groups on a "different" system results in
3658 an error return. The following code should cope with both types of system.
3659
3660 Unfortunately, recent MacOS, which should be a FreeBSD, "helpfully" succeeds
3661 the "setgroups() with zero groups" - and changes the egid.
3662 Thanks to that we had to stash the original_egid above, for use below
3663 in the call to exim_setugid().
3664
3665 However, if this process isn't running as root, setgroups() can't be used
3666 since you have to be root to run it, even if throwing away groups.
3667 Except, sigh, for Hurd - where you can.
3668 Not being root here happens only in some unusual configurations. */
3669
3670 if ( !unprivileged
3671 #ifndef OS_SETGROUPS_ZERO_DROPS_ALL
3672 && setgroups(0, NULL) != 0
3673 #endif
3674 && setgroups(1, group_list) != 0)
3675 exim_fail("exim: setgroups() failed: %s\n", strerror(errno));
3676
3677 /* If the configuration file name has been altered by an argument on the
3678 command line (either a new file name or a macro definition) and the caller is
3679 not root, or if this is a filter testing run, remove any setuid privilege the
3680 program has and run as the underlying user.
3681
3682 The exim user is locked out of this, which severely restricts the use of -C
3683 for some purposes.
3684
3685 Otherwise, set the real ids to the effective values (should be root unless run
3686 from inetd, which it can either be root or the exim uid, if one is configured).
3687
3688 There is a private mechanism for bypassing some of this, in order to make it
3689 possible to test lots of configurations automatically, without having either to
3690 recompile each time, or to patch in an actual configuration file name and other
3691 values (such as the path name). If running in the test harness, pretend that
3692 configuration file changes and macro definitions haven't happened. */
3693
3694 if (( /* EITHER */
3695 (!f.trusted_config || /* Config changed, or */
3696 !macros_trusted(opt_D_used)) && /* impermissible macros and */
3697 real_uid != root_uid && /* Not root, and */
3698 !f.running_in_test_harness /* Not fudged */
3699 ) || /* OR */
3700 expansion_test /* expansion testing */
3701 || /* OR */
3702 filter_test != FTEST_NONE) /* Filter testing */
3703 {
3704 setgroups(group_count, group_list);
3705 exim_setugid(real_uid, real_gid, FALSE,
3706 US"-C, -D, -be or -bf forces real uid");
3707 removed_privilege = TRUE;
3708
3709 /* In the normal case when Exim is called like this, stderr is available
3710 and should be used for any logging information because attempts to write
3711 to the log will usually fail. To arrange this, we unset really_exim. However,
3712 if no stderr is available there is no point - we might as well have a go
3713 at the log (if it fails, syslog will be written).
3714
3715 Note that if the invoker is Exim, the logs remain available. Messing with
3716 this causes unlogged successful deliveries. */
3717
3718 if (log_stderr && real_uid != exim_uid)
3719 f.really_exim = FALSE;
3720 }
3721
3722 /* Privilege is to be retained for the moment. It may be dropped later,
3723 depending on the job that this Exim process has been asked to do. For now, set
3724 the real uid to the effective so that subsequent re-execs of Exim are done by a
3725 privileged user. */
3726
3727 else
3728 exim_setugid(geteuid(), original_egid, FALSE, US"forcing real = effective");
3729
3730 /* If testing a filter, open the file(s) now, before wasting time doing other
3731 setups and reading the message. */
3732
3733 if (filter_test & FTEST_SYSTEM)
3734 if ((filter_sfd = Uopen(filter_test_sfile, O_RDONLY, 0)) < 0)
3735 exim_fail("exim: failed to open %s: %s\n", filter_test_sfile,
3736 strerror(errno));
3737
3738 if (filter_test & FTEST_USER)
3739 if ((filter_ufd = Uopen(filter_test_ufile, O_RDONLY, 0)) < 0)
3740 exim_fail("exim: failed to open %s: %s\n", filter_test_ufile,
3741 strerror(errno));
3742
3743 /* Initialise lookup_list
3744 If debugging, already called above via version reporting.
3745 In either case, we initialise the list of available lookups while running
3746 as root. All dynamically modules are loaded from a directory which is
3747 hard-coded into the binary and is code which, if not a module, would be
3748 part of Exim already. Ability to modify the content of the directory
3749 is equivalent to the ability to modify a setuid binary!
3750
3751 This needs to happen before we read the main configuration. */
3752 init_lookup_list();
3753
3754 #ifdef SUPPORT_I18N
3755 if (f.running_in_test_harness) smtputf8_advertise_hosts = NULL;
3756 #endif
3757
3758 /* Read the main runtime configuration data; this gives up if there
3759 is a failure. It leaves the configuration file open so that the subsequent
3760 configuration data for delivery can be read if needed.
3761
3762 NOTE: immediately after opening the configuration file we change the working
3763 directory to "/"! Later we change to $spool_directory. We do it there, because
3764 during readconf_main() some expansion takes place already. */
3765
3766 /* Store the initial cwd before we change directories. Can be NULL if the
3767 dir has already been unlinked. */
3768 initial_cwd = os_getcwd(NULL, 0);
3769
3770 /* checking:
3771 -be[m] expansion test -
3772 -b[fF] filter test new
3773 -bh[c] host test -
3774 -bmalware malware_test_file new
3775 -brt retry test new
3776 -brw rewrite test new
3777 -bt address test -
3778 -bv[s] address verify -
3779 list_options:
3780 -bP <option> (except -bP config, which sets list_config)
3781
3782 If any of these options is set, we suppress warnings about configuration
3783 issues (currently about tls_advertise_hosts and keep_environment not being
3784 defined) */
3785
3786 {
3787 #ifdef MEASURE_TIMING
3788 struct timeval t0, diff;
3789 (void)gettimeofday(&t0, NULL);
3790 #endif
3791
3792 readconf_main(checking || list_options);
3793
3794 #ifdef MEASURE_TIMING
3795 report_time_since(&t0, US"readconf_main (delta)");
3796 #endif
3797 }
3798
3799
3800 /* Now in directory "/" */
3801
3802 if (cleanup_environment() == FALSE)
3803 log_write(0, LOG_PANIC_DIE, "Can't cleanup environment");
3804
3805
3806 /* If an action on specific messages is requested, or if a daemon or queue
3807 runner is being started, we need to know if Exim was called by an admin user.
3808 This is the case if the real user is root or exim, or if the real group is
3809 exim, or if one of the supplementary groups is exim or a group listed in
3810 admin_groups. We don't fail all message actions immediately if not admin_user,
3811 since some actions can be performed by non-admin users. Instead, set admin_user
3812 for later interrogation. */
3813
3814 if (real_uid == root_uid || real_uid == exim_uid || real_gid == exim_gid)
3815 f.admin_user = TRUE;
3816 else
3817 for (int i = 0; i < group_count && !f.admin_user; i++)
3818 if (group_list[i] == exim_gid)
3819 f.admin_user = TRUE;
3820 else if (admin_groups)
3821 for (int j = 1; j <= (int)admin_groups[0] && !f.admin_user; j++)
3822 if (admin_groups[j] == group_list[i])
3823 f.admin_user = TRUE;
3824
3825 /* Another group of privileged users are the trusted users. These are root,
3826 exim, and any caller matching trusted_users or trusted_groups. Trusted callers
3827 are permitted to specify sender_addresses with -f on the command line, and
3828 other message parameters as well. */
3829
3830 if (real_uid == root_uid || real_uid == exim_uid)
3831 f.trusted_caller = TRUE;
3832 else
3833 {
3834 if (trusted_users)
3835 for (int i = 1; i <= (int)trusted_users[0] && !f.trusted_caller; i++)
3836 if (trusted_users[i] == real_uid)
3837 f.trusted_caller = TRUE;
3838
3839 if (trusted_groups)
3840 for (int i = 1; i <= (int)trusted_groups[0] && !f.trusted_caller; i++)
3841 if (trusted_groups[i] == real_gid)
3842 f.trusted_caller = TRUE;
3843 else for (int j = 0; j < group_count && !f.trusted_caller; j++)
3844 if (trusted_groups[i] == group_list[j])
3845 f.trusted_caller = TRUE;
3846 }
3847
3848 /* At this point, we know if the user is privileged and some command-line
3849 options become possibly impermissible, depending upon the configuration file. */
3850
3851 if (checking && commandline_checks_require_admin && !f.admin_user)
3852 exim_fail("exim: those command-line flags are set to require admin\n");
3853
3854 /* Handle the decoding of logging options. */
3855
3856 decode_bits(log_selector, log_selector_size, log_notall,
3857 log_selector_string, log_options, log_options_count, US"log", 0);
3858
3859 DEBUG(D_any)
3860 {
3861 debug_printf("configuration file is %s\n", config_main_filename);
3862 debug_printf("log selectors =");
3863 for (int i = 0; i < log_selector_size; i++)
3864 debug_printf(" %08x", log_selector[i]);
3865 debug_printf("\n");
3866 }
3867
3868 /* If domain literals are not allowed, check the sender address that was
3869 supplied with -f. Ditto for a stripped trailing dot. */
3870
3871 if (sender_address)
3872 {
3873 if (sender_address[sender_address_domain] == '[' && !allow_domain_literals)
3874 exim_fail("exim: bad -f address \"%s\": domain literals not "
3875 "allowed\n", sender_address);
3876 if (f_end_dot && !strip_trailing_dot)
3877 exim_fail("exim: bad -f address \"%s.\": domain is malformed "
3878 "(trailing dot not allowed)\n", sender_address);
3879 }
3880
3881 /* See if an admin user overrode our logging. */
3882
3883 if (cmdline_syslog_name)
3884 if (f.admin_user)
3885 {
3886 syslog_processname = cmdline_syslog_name;
3887 log_file_path = string_copy(CUS"syslog");
3888 }
3889 else
3890 /* not a panic, non-privileged users should not be able to spam paniclog */
3891 exim_fail(
3892 "exim: you lack sufficient privilege to specify syslog process name\n");
3893
3894 /* Paranoia check of maximum lengths of certain strings. There is a check
3895 on the length of the log file path in log.c, which will come into effect
3896 if there are any calls to write the log earlier than this. However, if we
3897 get this far but the string is very long, it is better to stop now than to
3898 carry on and (e.g.) receive a message and then have to collapse. The call to
3899 log_write() from here will cause the ultimate panic collapse if the complete
3900 file name exceeds the buffer length. */
3901
3902 if (Ustrlen(log_file_path) > 200)
3903 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3904 "log_file_path is longer than 200 chars: aborting");
3905
3906 if (Ustrlen(pid_file_path) > 200)
3907 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3908 "pid_file_path is longer than 200 chars: aborting");
3909
3910 if (Ustrlen(spool_directory) > 200)
3911 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3912 "spool_directory is longer than 200 chars: aborting");
3913
3914 /* Length check on the process name given to syslog for its TAG field,
3915 which is only permitted to be 32 characters or less. See RFC 3164. */
3916
3917 if (Ustrlen(syslog_processname) > 32)
3918 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3919 "syslog_processname is longer than 32 chars: aborting");
3920
3921 if (log_oneline)
3922 if (f.admin_user)
3923 {
3924 log_write(0, LOG_MAIN, "%s", log_oneline);
3925 return EXIT_SUCCESS;
3926 }
3927 else
3928 return EXIT_FAILURE;
3929
3930 /* In some operating systems, the environment variable TMPDIR controls where
3931 temporary files are created; Exim doesn't use these (apart from when delivering
3932 to MBX mailboxes), but called libraries such as DBM libraries may require them.
3933 If TMPDIR is found in the environment, reset it to the value defined in the
3934 EXIM_TMPDIR macro, if this macro is defined. For backward compatibility this
3935 macro may be called TMPDIR in old "Local/Makefile"s. It's converted to
3936 EXIM_TMPDIR by the build scripts.
3937 */
3938
3939 #ifdef EXIM_TMPDIR
3940 if (environ) for (uschar ** p = USS environ; *p; p++)
3941 if (Ustrncmp(*p, "TMPDIR=", 7) == 0 && Ustrcmp(*p+7, EXIM_TMPDIR) != 0)
3942 {
3943 uschar * newp = store_malloc(Ustrlen(EXIM_TMPDIR) + 8);
3944 sprintf(CS newp, "TMPDIR=%s", EXIM_TMPDIR);
3945 *p = newp;
3946 DEBUG(D_any) debug_printf("reset TMPDIR=%s in environment\n", EXIM_TMPDIR);
3947 }
3948 #endif
3949
3950 /* Timezone handling. If timezone_string is "utc", set a flag to cause all
3951 timestamps to be in UTC (gmtime() is used instead of localtime()). Otherwise,
3952 we may need to get rid of a bogus timezone setting. This can arise when Exim is
3953 called by a user who has set the TZ variable. This then affects the timestamps
3954 in log files and in Received: headers, and any created Date: header lines. The
3955 required timezone is settable in the configuration file, so nothing can be done
3956 about this earlier - but hopefully nothing will normally be logged earlier than
3957 this. We have to make a new environment if TZ is wrong, but don't bother if
3958 timestamps_utc is set, because then all times are in UTC anyway. */
3959
3960 if (timezone_string && strcmpic(timezone_string, US"UTC") == 0)
3961 f.timestamps_utc = TRUE;
3962 else
3963 {
3964 uschar *envtz = US getenv("TZ");
3965 if (envtz
3966 ? !timezone_string || Ustrcmp(timezone_string, envtz) != 0
3967 : timezone_string != NULL
3968 )
3969 {
3970 uschar **p = USS environ;
3971 uschar **new;
3972 uschar **newp;
3973 int count = 0;
3974 if (environ) while (*p++) count++;
3975 if (!envtz) count++;
3976 newp = new = store_malloc(sizeof(uschar *) * (count + 1));
3977 if (environ) for (p = USS environ; *p; p++)
3978 if (Ustrncmp(*p, "TZ=", 3) != 0) *newp++ = *p;
3979 if (timezone_string)
3980 {
3981 *newp = store_malloc(Ustrlen(timezone_string) + 4);
3982 sprintf(CS *newp++, "TZ=%s", timezone_string);
3983 }
3984 *newp = NULL;
3985 environ = CSS new;
3986 tzset();
3987 DEBUG(D_any) debug_printf("Reset TZ to %s: time is %s\n", timezone_string,
3988 tod_stamp(tod_log));
3989 }
3990 }
3991
3992 /* Handle the case when we have removed the setuid privilege because of -C or
3993 -D. This means that the caller of Exim was not root.
3994
3995 There is a problem if we were running as the Exim user. The sysadmin may
3996 expect this case to retain privilege because "the binary was called by the
3997 Exim user", but it hasn't, because either the -D option set macros, or the
3998 -C option set a non-trusted configuration file. There are two possibilities:
3999
4000 (1) If deliver_drop_privilege is set, Exim is not going to re-exec in order
4001 to do message deliveries. Thus, the fact that it is running as a
4002 non-privileged user is plausible, and might be wanted in some special
4003 configurations. However, really_exim will have been set false when
4004 privilege was dropped, to stop Exim trying to write to its normal log
4005 files. Therefore, re-enable normal log processing, assuming the sysadmin
4006 has set up the log directory correctly.
4007
4008 (2) If deliver_drop_privilege is not set, the configuration won't work as
4009 apparently intended, and so we log a panic message. In order to retain
4010 root for -C or -D, the caller must either be root or be invoking a
4011 trusted configuration file (when deliver_drop_privilege is false). */
4012
4013 if ( removed_privilege
4014 && (!f.trusted_config || opt_D_used)
4015 && real_uid == exim_uid)
4016 if (deliver_drop_privilege)
4017 f.really_exim = TRUE; /* let logging work normally */
4018 else
4019 log_write(0, LOG_MAIN|LOG_PANIC,
4020 "exim user lost privilege for using %s option",
4021 f.trusted_config? "-D" : "-C");
4022
4023 /* Start up Perl interpreter if Perl support is configured and there is a
4024 perl_startup option, and the configuration or the command line specifies
4025 initializing starting. Note that the global variables are actually called
4026 opt_perl_xxx to avoid clashing with perl's namespace (perl_*). */
4027
4028 #ifdef EXIM_PERL
4029 if (perl_start_option != 0)
4030 opt_perl_at_start = (perl_start_option > 0);
4031 if (opt_perl_at_start && opt_perl_startup != NULL)
4032 {
4033 uschar *errstr;
4034 DEBUG(D_any) debug_printf("Starting Perl interpreter\n");
4035 if ((errstr = init_perl(opt_perl_startup)))
4036 exim_fail("exim: error in perl_startup code: %s\n", errstr);
4037 opt_perl_started = TRUE;
4038 }
4039 #endif /* EXIM_PERL */
4040
4041 /* Log the arguments of the call if the configuration file said so. This is
4042 a debugging feature for finding out what arguments certain MUAs actually use.
4043 Don't attempt it if logging is disabled, or if listing variables or if
4044 verifying/testing addresses or expansions. */
4045
4046 if ( (debug_selector & D_any || LOGGING(arguments))
4047 && f.really_exim && !list_options && !checking)
4048 {
4049 uschar *p = big_buffer;
4050 Ustrcpy(p, US"cwd= (failed)");
4051
4052 if (!initial_cwd)
4053 p += 13;
4054 else
4055 {
4056 Ustrncpy(p + 4, initial_cwd, big_buffer_size-5);
4057 p += 4 + Ustrlen(initial_cwd);
4058 /* in case p is near the end and we don't provide enough space for
4059 * string_format to be willing to write. */
4060 *p = '\0';
4061 }
4062
4063 (void)string_format(p, big_buffer_size - (p - big_buffer), " %d args:", argc);
4064 while (*p) p++;
4065 for (int i = 0; i < argc; i++)
4066 {
4067 int len = Ustrlen(argv[i]);
4068 const uschar *printing;
4069 uschar *quote;
4070 if (p + len + 8 >= big_buffer + big_buffer_size)
4071 {
4072 Ustrcpy(p, US" ...");
4073 log_write(0, LOG_MAIN, "%s", big_buffer);
4074 Ustrcpy(big_buffer, US"...");
4075 p = big_buffer + 3;
4076 }
4077 printing = string_printing(argv[i]);
4078 if (printing[0] == 0) quote = US"\""; else
4079 {
4080 const uschar *pp = printing;
4081 quote = US"";
4082 while (*pp != 0) if (isspace(*pp++)) { quote = US"\""; break; }
4083 }
4084 p += sprintf(CS p, " %s%.*s%s", quote, (int)(big_buffer_size -
4085 (p - big_buffer) - 4), printing, quote);
4086 }
4087
4088 if (LOGGING(arguments))
4089 log_write(0, LOG_MAIN, "%s", big_buffer);
4090 else
4091 debug_printf("%s\n", big_buffer);
4092 }
4093
4094 /* Set the working directory to be the top-level spool directory. We don't rely
4095 on this in the code, which always uses fully qualified names, but it's useful