2ac0720cab52056acf5bc82b23d9941ffe6fb0df
[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 int save_errno = errno;
313
314 if (itval->it_value.tv_usec < 50 && itval->it_value.tv_sec == 0)
315 return;
316 (void)sigemptyset(&sigmask); /* Empty mask */
317 (void)sigaddset(&sigmask, SIGALRM); /* Add SIGALRM */
318 (void)sigprocmask(SIG_BLOCK, &sigmask, &old_sigmask); /* Block SIGALRM */
319 if (setitimer(ITIMER_REAL, itval, NULL) < 0) /* Start timer */
320 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
321 "setitimer() failed: %s", strerror(errno));
322 (void)sigfillset(&sigmask); /* All signals */
323 (void)sigdelset(&sigmask, SIGALRM); /* Remove SIGALRM */
324 (void)sigsuspend(&sigmask); /* Until SIGALRM */
325 (void)sigprocmask(SIG_SETMASK, &old_sigmask, NULL); /* Restore mask */
326 errno = save_errno;
327 sigalrm_seen = FALSE;
328 }
329
330
331
332
333 /*************************************************
334 * Millisecond sleep function *
335 *************************************************/
336
337 /* The basic sleep() function has a granularity of 1 second, which is too rough
338 in some cases - for example, when using an increasing delay to slow down
339 spammers.
340
341 Argument: number of millseconds
342 Returns: nothing
343 */
344
345 void
346 millisleep(int msec)
347 {
348 struct itimerval itval = {.it_interval = {.tv_sec = 0, .tv_usec = 0},
349 .it_value = {.tv_sec = msec/1000,
350 .tv_usec = (msec % 1000) * 1000}};
351 milliwait(&itval);
352 }
353
354
355
356 /*************************************************
357 * Compare microsecond times *
358 *************************************************/
359
360 /*
361 Arguments:
362 tv1 the first time
363 tv2 the second time
364
365 Returns: -1, 0, or +1
366 */
367
368 static int
369 exim_tvcmp(struct timeval *t1, struct timeval *t2)
370 {
371 if (t1->tv_sec > t2->tv_sec) return +1;
372 if (t1->tv_sec < t2->tv_sec) return -1;
373 if (t1->tv_usec > t2->tv_usec) return +1;
374 if (t1->tv_usec < t2->tv_usec) return -1;
375 return 0;
376 }
377
378
379
380
381 /*************************************************
382 * Clock tick wait function *
383 *************************************************/
384
385 #ifdef _POSIX_MONOTONIC_CLOCK
386 /* Amount CLOCK_MONOTONIC is behind realtime, at startup. */
387 static struct timespec offset_ts;
388
389 static void
390 exim_clock_init(void)
391 {
392 struct timeval tv;
393 if (clock_gettime(CLOCK_MONOTONIC, &offset_ts) != 0) return;
394 (void)gettimeofday(&tv, NULL);
395 offset_ts.tv_sec = tv.tv_sec - offset_ts.tv_sec;
396 offset_ts.tv_nsec = tv.tv_usec * 1000 - offset_ts.tv_nsec;
397 if (offset_ts.tv_nsec >= 0) return;
398 offset_ts.tv_sec--;
399 offset_ts.tv_nsec += 1000*1000*1000;
400 }
401 #endif
402
403
404 /* Exim uses a time + a pid to generate a unique identifier in two places: its
405 message IDs, and in file names for maildir deliveries. Because some OS now
406 re-use pids within the same second, sub-second times are now being used.
407 However, for absolute certainty, we must ensure the clock has ticked before
408 allowing the relevant process to complete. At the time of implementation of
409 this code (February 2003), the speed of processors is such that the clock will
410 invariably have ticked already by the time a process has done its job. This
411 function prepares for the time when things are faster - and it also copes with
412 clocks that go backwards.
413
414 Arguments:
415 tgt_tv A timeval which was used to create uniqueness; its usec field
416 has been rounded down to the value of the resolution.
417 We want to be sure the current time is greater than this.
418 resolution The resolution that was used to divide the microseconds
419 (1 for maildir, larger for message ids)
420
421 Returns: nothing
422 */
423
424 void
425 exim_wait_tick(struct timeval * tgt_tv, int resolution)
426 {
427 struct timeval now_tv;
428 long int now_true_usec;
429
430 #ifdef _POSIX_MONOTONIC_CLOCK
431 struct timespec now_ts;
432
433 if (clock_gettime(CLOCK_MONOTONIC, &now_ts) == 0)
434 {
435 now_ts.tv_sec += offset_ts.tv_sec;
436 if ((now_ts.tv_nsec += offset_ts.tv_nsec) >= 1000*1000*1000)
437 {
438 now_ts.tv_sec++;
439 now_ts.tv_nsec -= 1000*1000*1000;
440 }
441 now_tv.tv_sec = now_ts.tv_sec;
442 now_true_usec = (now_ts.tv_nsec / (resolution * 1000)) * resolution;
443 now_tv.tv_usec = now_true_usec;
444 }
445 else
446 #endif
447 {
448 (void)gettimeofday(&now_tv, NULL);
449 now_true_usec = now_tv.tv_usec;
450 now_tv.tv_usec = (now_true_usec/resolution) * resolution;
451 }
452
453 while (exim_tvcmp(&now_tv, tgt_tv) <= 0)
454 {
455 struct itimerval itval;
456 itval.it_interval.tv_sec = 0;
457 itval.it_interval.tv_usec = 0;
458 itval.it_value.tv_sec = tgt_tv->tv_sec - now_tv.tv_sec;
459 itval.it_value.tv_usec = tgt_tv->tv_usec + resolution - now_true_usec;
460
461 /* We know that, overall, "now" is less than or equal to "then". Therefore, a
462 negative value for the microseconds is possible only in the case when "now"
463 is more than a second less than "tgt". That means that itval.it_value.tv_sec
464 is greater than zero. The following correction is therefore safe. */
465
466 if (itval.it_value.tv_usec < 0)
467 {
468 itval.it_value.tv_usec += 1000000;
469 itval.it_value.tv_sec -= 1;
470 }
471
472 DEBUG(D_transport|D_receive)
473 {
474 if (!f.running_in_test_harness)
475 {
476 debug_printf("tick check: " TIME_T_FMT ".%06lu " TIME_T_FMT ".%06lu\n",
477 tgt_tv->tv_sec, (long) tgt_tv->tv_usec,
478 now_tv.tv_sec, (long) now_tv.tv_usec);
479 debug_printf("waiting " TIME_T_FMT ".%06lu sec\n",
480 itval.it_value.tv_sec, (long) itval.it_value.tv_usec);
481 }
482 }
483
484 milliwait(&itval);
485
486 /* Be prapared to go around if the kernel does not implement subtick
487 granularity (GNU Hurd) */
488
489 (void)gettimeofday(&now_tv, NULL);
490 now_true_usec = now_tv.tv_usec;
491 now_tv.tv_usec = (now_true_usec/resolution) * resolution;
492 }
493 }
494
495
496
497
498 /*************************************************
499 * Call fopen() with umask 777 and adjust mode *
500 *************************************************/
501
502 /* Exim runs with umask(0) so that files created with open() have the mode that
503 is specified in the open() call. However, there are some files, typically in
504 the spool directory, that are created with fopen(). They end up world-writeable
505 if no precautions are taken. Although the spool directory is not accessible to
506 the world, this is an untidiness. So this is a wrapper function for fopen()
507 that sorts out the mode of the created file.
508
509 Arguments:
510 filename the file name
511 options the fopen() options
512 mode the required mode
513
514 Returns: the fopened FILE or NULL
515 */
516
517 FILE *
518 modefopen(const uschar *filename, const char *options, mode_t mode)
519 {
520 mode_t saved_umask = umask(0777);
521 FILE *f = Ufopen(filename, options);
522 (void)umask(saved_umask);
523 if (f != NULL) (void)fchmod(fileno(f), mode);
524 return f;
525 }
526
527
528 /*************************************************
529 * Ensure stdin, stdout, and stderr exist *
530 *************************************************/
531
532 /* Some operating systems grumble if an exec() happens without a standard
533 input, output, and error (fds 0, 1, 2) being defined. The worry is that some
534 file will be opened and will use these fd values, and then some other bit of
535 code will assume, for example, that it can write error messages to stderr.
536 This function ensures that fds 0, 1, and 2 are open if they do not already
537 exist, by connecting them to /dev/null.
538
539 This function is also used to ensure that std{in,out,err} exist at all times,
540 so that if any library that Exim calls tries to use them, it doesn't crash.
541
542 Arguments: None
543 Returns: Nothing
544 */
545
546 void
547 exim_nullstd(void)
548 {
549 int devnull = -1;
550 struct stat statbuf;
551 for (int i = 0; i <= 2; i++)
552 {
553 if (fstat(i, &statbuf) < 0 && errno == EBADF)
554 {
555 if (devnull < 0) devnull = open("/dev/null", O_RDWR);
556 if (devnull < 0) log_write(0, LOG_MAIN|LOG_PANIC_DIE, "%s",
557 string_open_failed(errno, "/dev/null", NULL));
558 if (devnull != i) (void)dup2(devnull, i);
559 }
560 }
561 if (devnull > 2) (void)close(devnull);
562 }
563
564
565
566
567 /*************************************************
568 * Close unwanted file descriptors for delivery *
569 *************************************************/
570
571 /* This function is called from a new process that has been forked to deliver
572 an incoming message, either directly, or using exec.
573
574 We want any smtp input streams to be closed in this new process. However, it
575 has been observed that using fclose() here causes trouble. When reading in -bS
576 input, duplicate copies of messages have been seen. The files will be sharing a
577 file pointer with the parent process, and it seems that fclose() (at least on
578 some systems - I saw this on Solaris 2.5.1) messes with that file pointer, at
579 least sometimes. Hence we go for closing the underlying file descriptors.
580
581 If TLS is active, we want to shut down the TLS library, but without molesting
582 the parent's SSL connection.
583
584 For delivery of a non-SMTP message, we want to close stdin and stdout (and
585 stderr unless debugging) because the calling process might have set them up as
586 pipes and be waiting for them to close before it waits for the submission
587 process to terminate. If they aren't closed, they hold up the calling process
588 until the initial delivery process finishes, which is not what we want.
589
590 Exception: We do want it for synchronous delivery!
591
592 And notwithstanding all the above, if D_resolver is set, implying resolver
593 debugging, leave stdout open, because that's where the resolver writes its
594 debugging output.
595
596 When we close stderr (which implies we've also closed stdout), we also get rid
597 of any controlling terminal.
598
599 Arguments: None
600 Returns: Nothing
601 */
602
603 static void
604 close_unwanted(void)
605 {
606 if (smtp_input)
607 {
608 #ifndef DISABLE_TLS
609 tls_close(NULL, TLS_NO_SHUTDOWN); /* Shut down the TLS library */
610 #endif
611 (void)close(fileno(smtp_in));
612 (void)close(fileno(smtp_out));
613 smtp_in = NULL;
614 }
615 else
616 {
617 (void)close(0); /* stdin */
618 if ((debug_selector & D_resolver) == 0) (void)close(1); /* stdout */
619 if (debug_selector == 0) /* stderr */
620 {
621 if (!f.synchronous_delivery)
622 {
623 (void)close(2);
624 log_stderr = NULL;
625 }
626 (void)setsid();
627 }
628 }
629 }
630
631
632
633
634 /*************************************************
635 * Set uid and gid *
636 *************************************************/
637
638 /* This function sets a new uid and gid permanently, optionally calling
639 initgroups() to set auxiliary groups. There are some special cases when running
640 Exim in unprivileged modes. In these situations the effective uid will not be
641 root; if we already have the right effective uid/gid, and don't need to
642 initialize any groups, leave things as they are.
643
644 Arguments:
645 uid the uid
646 gid the gid
647 igflag TRUE if initgroups() wanted
648 msg text to use in debugging output and failure log
649
650 Returns: nothing; bombs out on failure
651 */
652
653 void
654 exim_setugid(uid_t uid, gid_t gid, BOOL igflag, uschar *msg)
655 {
656 uid_t euid = geteuid();
657 gid_t egid = getegid();
658
659 if (euid == root_uid || euid != uid || egid != gid || igflag)
660 {
661 /* At least one OS returns +1 for initgroups failure, so just check for
662 non-zero. */
663
664 if (igflag)
665 {
666 struct passwd *pw = getpwuid(uid);
667 if (!pw)
668 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "cannot run initgroups(): "
669 "no passwd entry for uid=%ld", (long int)uid);
670
671 if (initgroups(pw->pw_name, gid) != 0)
672 log_write(0,LOG_MAIN|LOG_PANIC_DIE,"initgroups failed for uid=%ld: %s",
673 (long int)uid, strerror(errno));
674 }
675
676 if (setgid(gid) < 0 || setuid(uid) < 0)
677 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "unable to set gid=%ld or uid=%ld "
678 "(euid=%ld): %s", (long int)gid, (long int)uid, (long int)euid, msg);
679 }
680
681 /* Debugging output included uid/gid and all groups */
682
683 DEBUG(D_uid)
684 {
685 int group_count, save_errno;
686 gid_t group_list[EXIM_GROUPLIST_SIZE];
687 debug_printf("changed uid/gid: %s\n uid=%ld gid=%ld pid=%ld\n", msg,
688 (long int)geteuid(), (long int)getegid(), (long int)getpid());
689 group_count = getgroups(nelem(group_list), group_list);
690 save_errno = errno;
691 debug_printf(" auxiliary group list:");
692 if (group_count > 0)
693 for (int i = 0; i < group_count; i++) debug_printf(" %d", (int)group_list[i]);
694 else if (group_count < 0)
695 debug_printf(" <error: %s>", strerror(save_errno));
696 else debug_printf(" <none>");
697 debug_printf("\n");
698 }
699 }
700
701
702
703
704 /*************************************************
705 * Exit point *
706 *************************************************/
707
708 /* Exim exits via this function so that it always clears up any open
709 databases.
710
711 Arguments:
712 rc return code
713
714 Returns: does not return
715 */
716
717 void
718 exim_exit(int rc, const uschar * process)
719 {
720 search_tidyup();
721 store_exit();
722 DEBUG(D_any)
723 debug_printf(">>>>>>>>>>>>>>>> Exim pid=%d %s%s%sterminating with rc=%d "
724 ">>>>>>>>>>>>>>>>\n", (int)getpid(),
725 process ? "(" : "", process, process ? ") " : "", rc);
726 exit(rc);
727 }
728
729
730 void
731 exim_underbar_exit(int rc, const uschar * process)
732 {
733 store_exit();
734 DEBUG(D_any)
735 debug_printf(">>>>>>>>>>>>>>>> Exim pid=%d %s%s%sterminating with rc=%d "
736 ">>>>>>>>>>>>>>>>\n", (int)getpid(),
737 process ? "(" : "", process, process ? ") " : "", rc);
738 _exit(rc);
739 }
740
741
742
743 /* Print error string, then die */
744 static void
745 exim_fail(const char * fmt, ...)
746 {
747 va_list ap;
748 va_start(ap, fmt);
749 vfprintf(stderr, fmt, ap);
750 exit(EXIT_FAILURE);
751 }
752
753 /* exim_chown_failure() called from exim_chown()/exim_fchown() on failure
754 of chown()/fchown(). See src/functions.h for more explanation */
755 int
756 exim_chown_failure(int fd, const uschar *name, uid_t owner, gid_t group)
757 {
758 int saved_errno = errno; /* from the preceeding chown call */
759 #if 1
760 log_write(0, LOG_MAIN|LOG_PANIC,
761 __FILE__ ":%d: chown(%s, %d:%d) failed (%s)."
762 " Please contact the authors and refer to https://bugs.exim.org/show_bug.cgi?id=2391",
763 __LINE__, name?name:US"<unknown>", owner, group, strerror(errno));
764 #else
765 /* I leave this here, commented, in case the "bug"(?) comes up again.
766 It is not an Exim bug, but we can provide a workaround.
767 See Bug 2391
768 HS 2019-04-18 */
769
770 struct stat buf;
771
772 if (0 == (fd < 0 ? stat(name, &buf) : fstat(fd, &buf)))
773 {
774 if (buf.st_uid == owner && buf.st_gid == group) return 0;
775 log_write(0, LOG_MAIN|LOG_PANIC, "Wrong ownership on %s", name);
776 }
777 else log_write(0, LOG_MAIN|LOG_PANIC, "Stat failed on %s: %s", name, strerror(errno));
778
779 #endif
780 errno = saved_errno;
781 return -1;
782 }
783
784
785 /*************************************************
786 * Extract port from host address *
787 *************************************************/
788
789 /* Called to extract the port from the values given to -oMa and -oMi.
790 It also checks the syntax of the address, and terminates it before the
791 port data when a port is extracted.
792
793 Argument:
794 address the address, with possible port on the end
795
796 Returns: the port, or zero if there isn't one
797 bombs out on a syntax error
798 */
799
800 static int
801 check_port(uschar *address)
802 {
803 int port = host_address_extract_port(address);
804 if (string_is_ip_address(address, NULL) == 0)
805 exim_fail("exim abandoned: \"%s\" is not an IP address\n", address);
806 return port;
807 }
808
809
810
811 /*************************************************
812 * Test/verify an address *
813 *************************************************/
814
815 /* This function is called by the -bv and -bt code. It extracts a working
816 address from a full RFC 822 address. This isn't really necessary per se, but it
817 has the effect of collapsing source routes.
818
819 Arguments:
820 s the address string
821 flags flag bits for verify_address()
822 exit_value to be set for failures
823
824 Returns: nothing
825 */
826
827 static void
828 test_address(uschar *s, int flags, int *exit_value)
829 {
830 int start, end, domain;
831 uschar *parse_error = NULL;
832 uschar *address = parse_extract_address(s, &parse_error, &start, &end, &domain,
833 FALSE);
834 if (address == NULL)
835 {
836 fprintf(stdout, "syntax error: %s\n", parse_error);
837 *exit_value = 2;
838 }
839 else
840 {
841 int rc = verify_address(deliver_make_addr(address,TRUE), stdout, flags, -1,
842 -1, -1, NULL, NULL, NULL);
843 if (rc == FAIL) *exit_value = 2;
844 else if (rc == DEFER && *exit_value == 0) *exit_value = 1;
845 }
846 }
847
848
849
850 /*************************************************
851 * Show supported features *
852 *************************************************/
853
854 static void
855 show_db_version(FILE * f)
856 {
857 #ifdef DB_VERSION_STRING
858 DEBUG(D_any)
859 {
860 fprintf(f, "Library version: BDB: Compile: %s\n", DB_VERSION_STRING);
861 fprintf(f, " Runtime: %s\n",
862 db_version(NULL, NULL, NULL));
863 }
864 else
865 fprintf(f, "Berkeley DB: %s\n", DB_VERSION_STRING);
866
867 #elif defined(BTREEVERSION) && defined(HASHVERSION)
868 #ifdef USE_DB
869 fprintf(f, "Probably Berkeley DB version 1.8x (native mode)\n");
870 #else
871 fprintf(f, "Probably Berkeley DB version 1.8x (compatibility mode)\n");
872 #endif
873
874 #elif defined(_DBM_RDONLY) || defined(dbm_dirfno)
875 fprintf(f, "Probably ndbm\n");
876 #elif defined(USE_TDB)
877 fprintf(f, "Using tdb\n");
878 #else
879 #ifdef USE_GDBM
880 fprintf(f, "Probably GDBM (native mode)\n");
881 #else
882 fprintf(f, "Probably GDBM (compatibility mode)\n");
883 #endif
884 #endif
885 }
886
887
888 /* This function is called for -bV/--version and for -d to output the optional
889 features of the current Exim binary.
890
891 Arguments: a FILE for printing
892 Returns: nothing
893 */
894
895 static void
896 show_whats_supported(FILE * fp)
897 {
898 DEBUG(D_any) {} else show_db_version(fp);
899
900 fprintf(fp, "Support for:");
901 #ifdef SUPPORT_CRYPTEQ
902 fprintf(fp, " crypteq");
903 #endif
904 #if HAVE_ICONV
905 fprintf(fp, " iconv()");
906 #endif
907 #if HAVE_IPV6
908 fprintf(fp, " IPv6");
909 #endif
910 #ifdef HAVE_SETCLASSRESOURCES
911 fprintf(fp, " use_setclassresources");
912 #endif
913 #ifdef SUPPORT_PAM
914 fprintf(fp, " PAM");
915 #endif
916 #ifdef EXIM_PERL
917 fprintf(fp, " Perl");
918 #endif
919 #ifdef EXPAND_DLFUNC
920 fprintf(fp, " Expand_dlfunc");
921 #endif
922 #ifdef USE_TCP_WRAPPERS
923 fprintf(fp, " TCPwrappers");
924 #endif
925 #ifdef USE_GNUTLS
926 fprintf(fp, " GnuTLS");
927 #endif
928 #ifdef USE_OPENSSL
929 fprintf(fp, " OpenSSL");
930 #endif
931 #ifdef SUPPORT_TRANSLATE_IP_ADDRESS
932 fprintf(fp, " translate_ip_address");
933 #endif
934 #ifdef SUPPORT_MOVE_FROZEN_MESSAGES
935 fprintf(fp, " move_frozen_messages");
936 #endif
937 #ifdef WITH_CONTENT_SCAN
938 fprintf(fp, " Content_Scanning");
939 #endif
940 #ifdef SUPPORT_DANE
941 fprintf(fp, " DANE");
942 #endif
943 #ifndef DISABLE_DKIM
944 fprintf(fp, " DKIM");
945 #endif
946 #ifndef DISABLE_DNSSEC
947 fprintf(fp, " DNSSEC");
948 #endif
949 #ifndef DISABLE_EVENT
950 fprintf(fp, " Event");
951 #endif
952 #ifdef SUPPORT_I18N
953 fprintf(fp, " I18N");
954 #endif
955 #ifndef DISABLE_OCSP
956 fprintf(fp, " OCSP");
957 #endif
958 #ifndef DISABLE_PIPE_CONNECT
959 fprintf(fp, " PIPE_CONNECT");
960 #endif
961 #ifndef DISABLE_PRDR
962 fprintf(fp, " PRDR");
963 #endif
964 #ifdef SUPPORT_PROXY
965 fprintf(fp, " PROXY");
966 #endif
967 #ifdef SUPPORT_SOCKS
968 fprintf(fp, " SOCKS");
969 #endif
970 #ifdef SUPPORT_SPF
971 fprintf(fp, " SPF");
972 #endif
973 #ifdef SUPPORT_DMARC
974 fprintf(fp, " DMARC");
975 #endif
976 #ifdef TCP_FASTOPEN
977 tcp_init();
978 if (f.tcp_fastopen_ok) fprintf(fp, " TCP_Fast_Open");
979 #endif
980 #ifdef EXPERIMENTAL_ARC
981 fprintf(fp, " Experimental_ARC");
982 #endif
983 #ifdef EXPERIMENTAL_BRIGHTMAIL
984 fprintf(fp, " Experimental_Brightmail");
985 #endif
986 #ifdef EXPERIMENTAL_DCC
987 fprintf(fp, " Experimental_DCC");
988 #endif
989 #ifdef EXPERIMENTAL_DSN_INFO
990 fprintf(fp, " Experimental_DSN_info");
991 #endif
992 #ifdef EXPERIMENTAL_LMDB
993 fprintf(fp, " Experimental_LMDB");
994 #endif
995 #ifdef EXPERIMENTAL_QUEUE_RAMP
996 fprintf(fp, " Experimental_Queue_Ramp");
997 #endif
998 #ifdef EXPERIMENTAL_QUEUEFILE
999 fprintf(fp, " Experimental_QUEUEFILE");
1000 #endif
1001 #if defined(EXPERIMENTAL_SRS) || defined(EXPERIMENTAL_SRS_NATIVE)
1002 fprintf(fp, " Experimental_SRS");
1003 #endif
1004 #ifdef EXPERIMENTAL_TLS_RESUME
1005 fprintf(fp, " Experimental_TLS_resume");
1006 #endif
1007 fprintf(fp, "\n");
1008
1009 fprintf(fp, "Lookups (built-in):");
1010 #if defined(LOOKUP_LSEARCH) && LOOKUP_LSEARCH!=2
1011 fprintf(fp, " lsearch wildlsearch nwildlsearch iplsearch");
1012 #endif
1013 #if defined(LOOKUP_CDB) && LOOKUP_CDB!=2
1014 fprintf(fp, " cdb");
1015 #endif
1016 #if defined(LOOKUP_DBM) && LOOKUP_DBM!=2
1017 fprintf(fp, " dbm dbmjz dbmnz");
1018 #endif
1019 #if defined(LOOKUP_DNSDB) && LOOKUP_DNSDB!=2
1020 fprintf(fp, " dnsdb");
1021 #endif
1022 #if defined(LOOKUP_DSEARCH) && LOOKUP_DSEARCH!=2
1023 fprintf(fp, " dsearch");
1024 #endif
1025 #if defined(LOOKUP_IBASE) && LOOKUP_IBASE!=2
1026 fprintf(fp, " ibase");
1027 #endif
1028 #if defined(LOOKUP_JSON) && LOOKUP_JSON!=2
1029 fprintf(fp, " json");
1030 #endif
1031 #if defined(LOOKUP_LDAP) && LOOKUP_LDAP!=2
1032 fprintf(fp, " ldap ldapdn ldapm");
1033 #endif
1034 #ifdef EXPERIMENTAL_LMDB
1035 fprintf(fp, " lmdb");
1036 #endif
1037 #if defined(LOOKUP_MYSQL) && LOOKUP_MYSQL!=2
1038 fprintf(fp, " mysql");
1039 #endif
1040 #if defined(LOOKUP_NIS) && LOOKUP_NIS!=2
1041 fprintf(fp, " nis nis0");
1042 #endif
1043 #if defined(LOOKUP_NISPLUS) && LOOKUP_NISPLUS!=2
1044 fprintf(fp, " nisplus");
1045 #endif
1046 #if defined(LOOKUP_ORACLE) && LOOKUP_ORACLE!=2
1047 fprintf(fp, " oracle");
1048 #endif
1049 #if defined(LOOKUP_PASSWD) && LOOKUP_PASSWD!=2
1050 fprintf(fp, " passwd");
1051 #endif
1052 #if defined(LOOKUP_PGSQL) && LOOKUP_PGSQL!=2
1053 fprintf(fp, " pgsql");
1054 #endif
1055 #if defined(LOOKUP_REDIS) && LOOKUP_REDIS!=2
1056 fprintf(fp, " redis");
1057 #endif
1058 #if defined(LOOKUP_SQLITE) && LOOKUP_SQLITE!=2
1059 fprintf(fp, " sqlite");
1060 #endif
1061 #if defined(LOOKUP_TESTDB) && LOOKUP_TESTDB!=2
1062 fprintf(fp, " testdb");
1063 #endif
1064 #if defined(LOOKUP_WHOSON) && LOOKUP_WHOSON!=2
1065 fprintf(fp, " whoson");
1066 #endif
1067 fprintf(fp, "\n");
1068
1069 auth_show_supported(fp);
1070 route_show_supported(fp);
1071 transport_show_supported(fp);
1072
1073 #ifdef WITH_CONTENT_SCAN
1074 malware_show_supported(fp);
1075 #endif
1076
1077 if (fixed_never_users[0] > 0)
1078 {
1079 int i;
1080 fprintf(fp, "Fixed never_users: ");
1081 for (i = 1; i <= (int)fixed_never_users[0] - 1; i++)
1082 fprintf(fp, "%d:", (unsigned int)fixed_never_users[i]);
1083 fprintf(fp, "%d\n", (unsigned int)fixed_never_users[i]);
1084 }
1085
1086 fprintf(fp, "Configure owner: %d:%d\n", config_uid, config_gid);
1087
1088 fprintf(fp, "Size of off_t: " SIZE_T_FMT "\n", sizeof(off_t));
1089
1090 /* Everything else is details which are only worth reporting when debugging.
1091 Perhaps the tls_version_report should move into this too. */
1092 DEBUG(D_any) do {
1093
1094 /* clang defines __GNUC__ (at least, for me) so test for it first */
1095 #if defined(__clang__)
1096 fprintf(fp, "Compiler: CLang [%s]\n", __clang_version__);
1097 #elif defined(__GNUC__)
1098 fprintf(fp, "Compiler: GCC [%s]\n",
1099 # ifdef __VERSION__
1100 __VERSION__
1101 # else
1102 "? unknown version ?"
1103 # endif
1104 );
1105 #else
1106 fprintf(fp, "Compiler: <unknown>\n");
1107 #endif
1108
1109 #if defined(__GLIBC__) && !defined(__UCLIBC__)
1110 fprintf(fp, "Library version: Glibc: Compile: %d.%d\n",
1111 __GLIBC__, __GLIBC_MINOR__);
1112 if (__GLIBC_PREREQ(2, 1))
1113 fprintf(fp, " Runtime: %s\n",
1114 gnu_get_libc_version());
1115 #endif
1116
1117 show_db_version(fp);
1118
1119 #ifndef DISABLE_TLS
1120 tls_version_report(fp);
1121 #endif
1122 #ifdef SUPPORT_I18N
1123 utf8_version_report(fp);
1124 #endif
1125 #ifdef SUPPORT_SPF
1126 spf_lib_version_report(fp);
1127 #endif
1128
1129 for (auth_info * authi = auths_available; *authi->driver_name != '\0'; ++authi)
1130 if (authi->version_report)
1131 (*authi->version_report)(fp);
1132
1133 /* PCRE_PRERELEASE is either defined and empty or a bare sequence of
1134 characters; unless it's an ancient version of PCRE in which case it
1135 is not defined. */
1136 #ifndef PCRE_PRERELEASE
1137 # define PCRE_PRERELEASE
1138 #endif
1139 #define QUOTE(X) #X
1140 #define EXPAND_AND_QUOTE(X) QUOTE(X)
1141 fprintf(fp, "Library version: PCRE: Compile: %d.%d%s\n"
1142 " Runtime: %s\n",
1143 PCRE_MAJOR, PCRE_MINOR,
1144 EXPAND_AND_QUOTE(PCRE_PRERELEASE) "",
1145 pcre_version());
1146 #undef QUOTE
1147 #undef EXPAND_AND_QUOTE
1148
1149 init_lookup_list();
1150 for (int i = 0; i < lookup_list_count; i++)
1151 if (lookup_list[i]->version_report)
1152 lookup_list[i]->version_report(fp);
1153
1154 #ifdef WHITELIST_D_MACROS
1155 fprintf(fp, "WHITELIST_D_MACROS: \"%s\"\n", WHITELIST_D_MACROS);
1156 #else
1157 fprintf(fp, "WHITELIST_D_MACROS unset\n");
1158 #endif
1159 #ifdef TRUSTED_CONFIG_LIST
1160 fprintf(fp, "TRUSTED_CONFIG_LIST: \"%s\"\n", TRUSTED_CONFIG_LIST);
1161 #else
1162 fprintf(fp, "TRUSTED_CONFIG_LIST unset\n");
1163 #endif
1164
1165 } while (0);
1166 }
1167
1168
1169 /*************************************************
1170 * Show auxiliary information about Exim *
1171 *************************************************/
1172
1173 static void
1174 show_exim_information(enum commandline_info request, FILE *stream)
1175 {
1176 switch(request)
1177 {
1178 case CMDINFO_NONE:
1179 fprintf(stream, "Oops, something went wrong.\n");
1180 return;
1181 case CMDINFO_HELP:
1182 fprintf(stream,
1183 "The -bI: flag takes a string indicating which information to provide.\n"
1184 "If the string is not recognised, you'll get this help (on stderr).\n"
1185 "\n"
1186 " exim -bI:help this information\n"
1187 " exim -bI:dscp list of known dscp value keywords\n"
1188 " exim -bI:sieve list of supported sieve extensions\n"
1189 );
1190 return;
1191 case CMDINFO_SIEVE:
1192 for (const uschar ** pp = exim_sieve_extension_list; *pp; ++pp)
1193 fprintf(stream, "%s\n", *pp);
1194 return;
1195 case CMDINFO_DSCP:
1196 dscp_list_to_stream(stream);
1197 return;
1198 }
1199 }
1200
1201
1202 /*************************************************
1203 * Quote a local part *
1204 *************************************************/
1205
1206 /* This function is used when a sender address or a From: or Sender: header
1207 line is being created from the caller's login, or from an authenticated_id. It
1208 applies appropriate quoting rules for a local part.
1209
1210 Argument: the local part
1211 Returns: the local part, quoted if necessary
1212 */
1213
1214 uschar *
1215 local_part_quote(uschar *lpart)
1216 {
1217 BOOL needs_quote = FALSE;
1218 gstring * g;
1219
1220 for (uschar * t = lpart; !needs_quote && *t != 0; t++)
1221 {
1222 needs_quote = !isalnum(*t) && strchr("!#$%&'*+-/=?^_`{|}~", *t) == NULL &&
1223 (*t != '.' || t == lpart || t[1] == 0);
1224 }
1225
1226 if (!needs_quote) return lpart;
1227
1228 g = string_catn(NULL, US"\"", 1);
1229
1230 for (;;)
1231 {
1232 uschar *nq = US Ustrpbrk(lpart, "\\\"");
1233 if (nq == NULL)
1234 {
1235 g = string_cat(g, lpart);
1236 break;
1237 }
1238 g = string_catn(g, lpart, nq - lpart);
1239 g = string_catn(g, US"\\", 1);
1240 g = string_catn(g, nq, 1);
1241 lpart = nq + 1;
1242 }
1243
1244 g = string_catn(g, US"\"", 1);
1245 return string_from_gstring(g);
1246 }
1247
1248
1249
1250 #ifdef USE_READLINE
1251 /*************************************************
1252 * Load readline() functions *
1253 *************************************************/
1254
1255 /* This function is called from testing executions that read data from stdin,
1256 but only when running as the calling user. Currently, only -be does this. The
1257 function loads the readline() function library and passes back the functions.
1258 On some systems, it needs the curses library, so load that too, but try without
1259 it if loading fails. All this functionality has to be requested at build time.
1260
1261 Arguments:
1262 fn_readline_ptr pointer to where to put the readline pointer
1263 fn_addhist_ptr pointer to where to put the addhistory function
1264
1265 Returns: the dlopen handle or NULL on failure
1266 */
1267
1268 static void *
1269 set_readline(char * (**fn_readline_ptr)(const char *),
1270 void (**fn_addhist_ptr)(const char *))
1271 {
1272 void *dlhandle;
1273 void *dlhandle_curses = dlopen("libcurses." DYNLIB_FN_EXT, RTLD_GLOBAL|RTLD_LAZY);
1274
1275 dlhandle = dlopen("libreadline." DYNLIB_FN_EXT, RTLD_GLOBAL|RTLD_NOW);
1276 if (dlhandle_curses) dlclose(dlhandle_curses);
1277
1278 if (dlhandle)
1279 {
1280 /* Checked manual pages; at least in GNU Readline 6.1, the prototypes are:
1281 * char * readline (const char *prompt);
1282 * void add_history (const char *string);
1283 */
1284 *fn_readline_ptr = (char *(*)(const char*))dlsym(dlhandle, "readline");
1285 *fn_addhist_ptr = (void(*)(const char*))dlsym(dlhandle, "add_history");
1286 }
1287 else
1288 DEBUG(D_any) debug_printf("failed to load readline: %s\n", dlerror());
1289
1290 return dlhandle;
1291 }
1292 #endif
1293
1294
1295
1296 /*************************************************
1297 * Get a line from stdin for testing things *
1298 *************************************************/
1299
1300 /* This function is called when running tests that can take a number of lines
1301 of input (for example, -be and -bt). It handles continuations and trailing
1302 spaces. And prompting and a blank line output on eof. If readline() is in use,
1303 the arguments are non-NULL and provide the relevant functions.
1304
1305 Arguments:
1306 fn_readline readline function or NULL
1307 fn_addhist addhist function or NULL
1308
1309 Returns: pointer to dynamic memory, or NULL at end of file
1310 */
1311
1312 static uschar *
1313 get_stdinput(char *(*fn_readline)(const char *), void(*fn_addhist)(const char *))
1314 {
1315 gstring * g = NULL;
1316
1317 if (!fn_readline) { printf("> "); fflush(stdout); }
1318
1319 for (int i = 0;; i++)
1320 {
1321 uschar buffer[1024];
1322 uschar *p, *ss;
1323
1324 #ifdef USE_READLINE
1325 char *readline_line = NULL;
1326 if (fn_readline)
1327 {
1328 if (!(readline_line = fn_readline((i > 0)? "":"> "))) break;
1329 if (*readline_line != 0 && fn_addhist) fn_addhist(readline_line);
1330 p = US readline_line;
1331 }
1332 else
1333 #endif
1334
1335 /* readline() not in use */
1336
1337 {
1338 if (Ufgets(buffer, sizeof(buffer), stdin) == NULL) break;
1339 p = buffer;
1340 }
1341
1342 /* Handle the line */
1343
1344 ss = p + (int)Ustrlen(p);
1345 while (ss > p && isspace(ss[-1])) ss--;
1346
1347 if (i > 0)
1348 while (p < ss && isspace(*p)) p++; /* leading space after cont */
1349
1350 g = string_catn(g, p, ss - p);
1351
1352 #ifdef USE_READLINE
1353 if (fn_readline) free(readline_line);
1354 #endif
1355
1356 /* g can only be NULL if ss==p */
1357 if (ss == p || g->s[g->ptr-1] != '\\')
1358 break;
1359
1360 --g->ptr;
1361 (void) string_from_gstring(g);
1362 }
1363
1364 if (!g) printf("\n");
1365 return string_from_gstring(g);
1366 }
1367
1368
1369
1370 /*************************************************
1371 * Output usage information for the program *
1372 *************************************************/
1373
1374 /* This function is called when there are no recipients
1375 or a specific --help argument was added.
1376
1377 Arguments:
1378 progname information on what name we were called by
1379
1380 Returns: DOES NOT RETURN
1381 */
1382
1383 static void
1384 exim_usage(uschar *progname)
1385 {
1386
1387 /* Handle specific program invocation variants */
1388 if (Ustrcmp(progname, US"-mailq") == 0)
1389 exim_fail(
1390 "mailq - list the contents of the mail queue\n\n"
1391 "For a list of options, see the Exim documentation.\n");
1392
1393 /* Generic usage - we output this whatever happens */
1394 exim_fail(
1395 "Exim is a Mail Transfer Agent. It is normally called by Mail User Agents,\n"
1396 "not directly from a shell command line. Options and/or arguments control\n"
1397 "what it does when called. For a list of options, see the Exim documentation.\n");
1398 }
1399
1400
1401
1402 /*************************************************
1403 * Validate that the macros given are okay *
1404 *************************************************/
1405
1406 /* Typically, Exim will drop privileges if macros are supplied. In some
1407 cases, we want to not do so.
1408
1409 Arguments: opt_D_used - true if the commandline had a "-D" option
1410 Returns: true if trusted, false otherwise
1411 */
1412
1413 static BOOL
1414 macros_trusted(BOOL opt_D_used)
1415 {
1416 #ifdef WHITELIST_D_MACROS
1417 uschar *whitelisted, *end, *p, **whites;
1418 int white_count, i, n;
1419 size_t len;
1420 BOOL prev_char_item, found;
1421 #endif
1422
1423 if (!opt_D_used)
1424 return TRUE;
1425 #ifndef WHITELIST_D_MACROS
1426 return FALSE;
1427 #else
1428
1429 /* We only trust -D overrides for some invoking users:
1430 root, the exim run-time user, the optional config owner user.
1431 I don't know why config-owner would be needed, but since they can own the
1432 config files anyway, there's no security risk to letting them override -D. */
1433 if ( ! ((real_uid == root_uid)
1434 || (real_uid == exim_uid)
1435 #ifdef CONFIGURE_OWNER
1436 || (real_uid == config_uid)
1437 #endif
1438 ))
1439 {
1440 debug_printf("macros_trusted rejecting macros for uid %d\n", (int) real_uid);
1441 return FALSE;
1442 }
1443
1444 /* Get a list of macros which are whitelisted */
1445 whitelisted = string_copy_perm(US WHITELIST_D_MACROS, FALSE);
1446 prev_char_item = FALSE;
1447 white_count = 0;
1448 for (p = whitelisted; *p != '\0'; ++p)
1449 {
1450 if (*p == ':' || isspace(*p))
1451 {
1452 *p = '\0';
1453 if (prev_char_item)
1454 ++white_count;
1455 prev_char_item = FALSE;
1456 continue;
1457 }
1458 if (!prev_char_item)
1459 prev_char_item = TRUE;
1460 }
1461 end = p;
1462 if (prev_char_item)
1463 ++white_count;
1464 if (!white_count)
1465 return FALSE;
1466 whites = store_malloc(sizeof(uschar *) * (white_count+1));
1467 for (p = whitelisted, i = 0; (p != end) && (i < white_count); ++p)
1468 {
1469 if (*p != '\0')
1470 {
1471 whites[i++] = p;
1472 if (i == white_count)
1473 break;
1474 while (*p != '\0' && p < end)
1475 ++p;
1476 }
1477 }
1478 whites[i] = NULL;
1479
1480 /* The list of commandline macros should be very short.
1481 Accept the N*M complexity. */
1482 for (macro_item * m = macros_user; m; m = m->next) if (m->command_line)
1483 {
1484 found = FALSE;
1485 for (uschar ** w = whites; *w; ++w)
1486 if (Ustrcmp(*w, m->name) == 0)
1487 {
1488 found = TRUE;
1489 break;
1490 }
1491 if (!found)
1492 return FALSE;
1493 if (!m->replacement)
1494 continue;
1495 if ((len = m->replen) == 0)
1496 continue;
1497 n = pcre_exec(regex_whitelisted_macro, NULL, CS m->replacement, len,
1498 0, PCRE_EOPT, NULL, 0);
1499 if (n < 0)
1500 {
1501 if (n != PCRE_ERROR_NOMATCH)
1502 debug_printf("macros_trusted checking %s returned %d\n", m->name, n);
1503 return FALSE;
1504 }
1505 }
1506 DEBUG(D_any) debug_printf("macros_trusted overridden to true by whitelisting\n");
1507 return TRUE;
1508 #endif
1509 }
1510
1511
1512 /*************************************************
1513 * Expansion testing *
1514 *************************************************/
1515
1516 /* Expand and print one item, doing macro-processing.
1517
1518 Arguments:
1519 item line for expansion
1520 */
1521
1522 static void
1523 expansion_test_line(uschar * line)
1524 {
1525 int len;
1526 BOOL dummy_macexp;
1527
1528 Ustrncpy(big_buffer, line, big_buffer_size);
1529 big_buffer[big_buffer_size-1] = '\0';
1530 len = Ustrlen(big_buffer);
1531
1532 (void) macros_expand(0, &len, &dummy_macexp);
1533
1534 if (isupper(big_buffer[0]))
1535 {
1536 if (macro_read_assignment(big_buffer))
1537 printf("Defined macro '%s'\n", mlast->name);
1538 }
1539 else
1540 if ((line = expand_string(big_buffer))) printf("%s\n", CS line);
1541 else printf("Failed: %s\n", expand_string_message);
1542 }
1543
1544
1545
1546 /*************************************************
1547 * Entry point and high-level code *
1548 *************************************************/
1549
1550 /* Entry point for the Exim mailer. Analyse the arguments and arrange to take
1551 the appropriate action. All the necessary functions are present in the one
1552 binary. I originally thought one should split it up, but it turns out that so
1553 much of the apparatus is needed in each chunk that one might as well just have
1554 it all available all the time, which then makes the coding easier as well.
1555
1556 Arguments:
1557 argc count of entries in argv
1558 argv argument strings, with argv[0] being the program name
1559
1560 Returns: EXIT_SUCCESS if terminated successfully
1561 EXIT_FAILURE otherwise, except when a message has been sent
1562 to the sender, and -oee was given
1563 */
1564
1565 int
1566 main(int argc, char **cargv)
1567 {
1568 uschar **argv = USS cargv;
1569 int arg_receive_timeout = -1;
1570 int arg_smtp_receive_timeout = -1;
1571 int arg_error_handling = error_handling;
1572 int filter_sfd = -1;
1573 int filter_ufd = -1;
1574 int group_count;
1575 int i, rv;
1576 int list_queue_option = 0;
1577 int msg_action = 0;
1578 int msg_action_arg = -1;
1579 int namelen = (argv[0] == NULL)? 0 : Ustrlen(argv[0]);
1580 int queue_only_reason = 0;
1581 #ifdef EXIM_PERL
1582 int perl_start_option = 0;
1583 #endif
1584 int recipients_arg = argc;
1585 int sender_address_domain = 0;
1586 int test_retry_arg = -1;
1587 int test_rewrite_arg = -1;
1588 gid_t original_egid;
1589 BOOL arg_queue_only = FALSE;
1590 BOOL bi_option = FALSE;
1591 BOOL checking = FALSE;
1592 BOOL count_queue = FALSE;
1593 BOOL expansion_test = FALSE;
1594 BOOL extract_recipients = FALSE;
1595 BOOL flag_G = FALSE;
1596 BOOL flag_n = FALSE;
1597 BOOL forced_delivery = FALSE;
1598 BOOL f_end_dot = FALSE;
1599 BOOL deliver_give_up = FALSE;
1600 BOOL list_queue = FALSE;
1601 BOOL list_options = FALSE;
1602 BOOL list_config = FALSE;
1603 BOOL local_queue_only;
1604 BOOL more = TRUE;
1605 BOOL one_msg_action = FALSE;
1606 BOOL opt_D_used = FALSE;
1607 BOOL queue_only_set = FALSE;
1608 BOOL receiving_message = TRUE;
1609 BOOL sender_ident_set = FALSE;
1610 BOOL session_local_queue_only;
1611 BOOL unprivileged;
1612 BOOL removed_privilege = FALSE;
1613 BOOL usage_wanted = FALSE;
1614 BOOL verify_address_mode = FALSE;
1615 BOOL verify_as_sender = FALSE;
1616 BOOL version_printed = FALSE;
1617 uschar *alias_arg = NULL;
1618 uschar *called_as = US"";
1619 uschar *cmdline_syslog_name = NULL;
1620 uschar *start_queue_run_id = NULL;
1621 uschar *stop_queue_run_id = NULL;
1622 uschar *expansion_test_message = NULL;
1623 uschar *ftest_domain = NULL;
1624 uschar *ftest_localpart = NULL;
1625 uschar *ftest_prefix = NULL;
1626 uschar *ftest_suffix = NULL;
1627 uschar *log_oneline = NULL;
1628 uschar *malware_test_file = NULL;
1629 uschar *real_sender_address;
1630 uschar *originator_home = US"/";
1631 size_t sz;
1632 rmark reset_point;
1633
1634 struct passwd *pw;
1635 struct stat statbuf;
1636 pid_t passed_qr_pid = (pid_t)0;
1637 int passed_qr_pipe = -1;
1638 gid_t group_list[EXIM_GROUPLIST_SIZE];
1639
1640 /* For the -bI: flag */
1641 enum commandline_info info_flag = CMDINFO_NONE;
1642 BOOL info_stdout = FALSE;
1643
1644 /* Possible options for -R and -S */
1645
1646 static uschar *rsopts[] = { US"f", US"ff", US"r", US"rf", US"rff" };
1647
1648 /* Need to define this in case we need to change the environment in order
1649 to get rid of a bogus time zone. We have to make it char rather than uschar
1650 because some OS define it in /usr/include/unistd.h. */
1651
1652 extern char **environ;
1653
1654 #ifdef MEASURE_TIMING
1655 (void)gettimeofday(&timestamp_startup, NULL);
1656 #endif
1657
1658 /* If the Exim user and/or group and/or the configuration file owner/group were
1659 defined by ref:name at build time, we must now find the actual uid/gid values.
1660 This is a feature to make the lives of binary distributors easier. */
1661
1662 #ifdef EXIM_USERNAME
1663 if (route_finduser(US EXIM_USERNAME, &pw, &exim_uid))
1664 {
1665 if (exim_uid == 0)
1666 exim_fail("exim: refusing to run with uid 0 for \"%s\"\n", EXIM_USERNAME);
1667
1668 /* If ref:name uses a number as the name, route_finduser() returns
1669 TRUE with exim_uid set and pw coerced to NULL. */
1670 if (pw)
1671 exim_gid = pw->pw_gid;
1672 #ifndef EXIM_GROUPNAME
1673 else
1674 exim_fail(
1675 "exim: ref:name should specify a usercode, not a group.\n"
1676 "exim: can't let you get away with it unless you also specify a group.\n");
1677 #endif
1678 }
1679 else
1680 exim_fail("exim: failed to find uid for user name \"%s\"\n", EXIM_USERNAME);
1681 #endif
1682
1683 #ifdef EXIM_GROUPNAME
1684 if (!route_findgroup(US EXIM_GROUPNAME, &exim_gid))
1685 exim_fail("exim: failed to find gid for group name \"%s\"\n", EXIM_GROUPNAME);
1686 #endif
1687
1688 #ifdef CONFIGURE_OWNERNAME
1689 if (!route_finduser(US CONFIGURE_OWNERNAME, NULL, &config_uid))
1690 exim_fail("exim: failed to find uid for user name \"%s\"\n",
1691 CONFIGURE_OWNERNAME);
1692 #endif
1693
1694 /* We default the system_filter_user to be the Exim run-time user, as a
1695 sane non-root value. */
1696 system_filter_uid = exim_uid;
1697
1698 #ifdef CONFIGURE_GROUPNAME
1699 if (!route_findgroup(US CONFIGURE_GROUPNAME, &config_gid))
1700 exim_fail("exim: failed to find gid for group name \"%s\"\n",
1701 CONFIGURE_GROUPNAME);
1702 #endif
1703
1704 /* In the Cygwin environment, some initialization used to need doing.
1705 It was fudged in by means of this macro; now no longer but we'll leave
1706 it in case of others. */
1707
1708 #ifdef OS_INIT
1709 OS_INIT
1710 #endif
1711
1712 /* Check a field which is patched when we are running Exim within its
1713 testing harness; do a fast initial check, and then the whole thing. */
1714
1715 f.running_in_test_harness =
1716 *running_status == '<' && Ustrcmp(running_status, "<<<testing>>>") == 0;
1717 if (f.running_in_test_harness)
1718 debug_store = TRUE;
1719
1720 /* The C standard says that the equivalent of setlocale(LC_ALL, "C") is obeyed
1721 at the start of a program; however, it seems that some environments do not
1722 follow this. A "strange" locale can affect the formatting of timestamps, so we
1723 make quite sure. */
1724
1725 setlocale(LC_ALL, "C");
1726
1727 /* Get the offset between CLOCK_MONOTONIC and wallclock */
1728
1729 #ifdef _POSIX_MONOTONIC_CLOCK
1730 exim_clock_init();
1731 #endif
1732
1733 /* Set up the default handler for timing using alarm(). */
1734
1735 os_non_restarting_signal(SIGALRM, sigalrm_handler);
1736
1737 /* Ensure we have a buffer for constructing log entries. Use malloc directly,
1738 because store_malloc writes a log entry on failure. */
1739
1740 if (!(log_buffer = US malloc(LOG_BUFFER_SIZE)))
1741 exim_fail("exim: failed to get store for log buffer\n");
1742
1743 /* Initialize the default log options. */
1744
1745 bits_set(log_selector, log_selector_size, log_default);
1746
1747 /* Set log_stderr to stderr, provided that stderr exists. This gets reset to
1748 NULL when the daemon is run and the file is closed. We have to use this
1749 indirection, because some systems don't allow writing to the variable "stderr".
1750 */
1751
1752 if (fstat(fileno(stderr), &statbuf) >= 0) log_stderr = stderr;
1753
1754 /* Arrange for the PCRE regex library to use our store functions. Note that
1755 the normal calls are actually macros that add additional arguments for
1756 debugging purposes so we have to assign specially constructed functions here.
1757 The default is to use store in the stacking pool, but this is overridden in the
1758 regex_must_compile() function. */
1759
1760 pcre_malloc = function_store_get;
1761 pcre_free = function_dummy_free;
1762
1763 /* Ensure there is a big buffer for temporary use in several places. It is put
1764 in malloc store so that it can be freed for enlargement if necessary. */
1765
1766 big_buffer = store_malloc(big_buffer_size);
1767
1768 /* Set up the handler for the data request signal, and set the initial
1769 descriptive text. */
1770
1771 process_info = store_get(PROCESS_INFO_SIZE, TRUE); /* tainted */
1772 set_process_info("initializing");
1773 os_restarting_signal(SIGUSR1, usr1_handler);
1774
1775 /* If running in a dockerized environment, the TERM signal is only
1776 delegated to the PID 1 if we request it by setting an signal handler */
1777 if (getpid() == 1) signal(SIGTERM, term_handler);
1778
1779 /* SIGHUP is used to get the daemon to reconfigure. It gets set as appropriate
1780 in the daemon code. For the rest of Exim's uses, we ignore it. */
1781
1782 signal(SIGHUP, SIG_IGN);
1783
1784 /* We don't want to die on pipe errors as the code is written to handle
1785 the write error instead. */
1786
1787 signal(SIGPIPE, SIG_IGN);
1788
1789 /* Under some circumstance on some OS, Exim can get called with SIGCHLD
1790 set to SIG_IGN. This causes subprocesses that complete before the parent
1791 process waits for them not to hang around, so when Exim calls wait(), nothing
1792 is there. The wait() code has been made robust against this, but let's ensure
1793 that SIGCHLD is set to SIG_DFL, because it's tidier to wait and get a process
1794 ending status. We use sigaction rather than plain signal() on those OS where
1795 SA_NOCLDWAIT exists, because we want to be sure it is turned off. (There was a
1796 problem on AIX with this.) */
1797
1798 #ifdef SA_NOCLDWAIT
1799 {
1800 struct sigaction act;
1801 act.sa_handler = SIG_DFL;
1802 sigemptyset(&(act.sa_mask));
1803 act.sa_flags = 0;
1804 sigaction(SIGCHLD, &act, NULL);
1805 }
1806 #else
1807 signal(SIGCHLD, SIG_DFL);
1808 #endif
1809
1810 /* Save the arguments for use if we re-exec exim as a daemon after receiving
1811 SIGHUP. */
1812
1813 sighup_argv = argv;
1814
1815 /* Set up the version number. Set up the leading 'E' for the external form of
1816 message ids, set the pointer to the internal form, and initialize it to
1817 indicate no message being processed. */
1818
1819 version_init();
1820 message_id_option[0] = '-';
1821 message_id_external = message_id_option + 1;
1822 message_id_external[0] = 'E';
1823 message_id = message_id_external + 1;
1824 message_id[0] = 0;
1825
1826 /* Set the umask to zero so that any files Exim creates using open() are
1827 created with the modes that it specifies. NOTE: Files created with fopen() have
1828 a problem, which was not recognized till rather late (February 2006). With this
1829 umask, such files will be world writeable. (They are all content scanning files
1830 in the spool directory, which isn't world-accessible, so this is not a
1831 disaster, but it's untidy.) I don't want to change this overall setting,
1832 however, because it will interact badly with the open() calls. Instead, there's
1833 now a function called modefopen() that fiddles with the umask while calling
1834 fopen(). */
1835
1836 (void)umask(0);
1837
1838 /* Precompile the regular expression for matching a message id. Keep this in
1839 step with the code that generates ids in the accept.c module. We need to do
1840 this here, because the -M options check their arguments for syntactic validity
1841 using mac_ismsgid, which uses this. */
1842
1843 regex_ismsgid =
1844 regex_must_compile(US"^(?:[^\\W_]{6}-){2}[^\\W_]{2}$", FALSE, TRUE);
1845
1846 /* Precompile the regular expression that is used for matching an SMTP error
1847 code, possibly extended, at the start of an error message. Note that the
1848 terminating whitespace character is included. */
1849
1850 regex_smtp_code =
1851 regex_must_compile(US"^\\d\\d\\d\\s(?:\\d\\.\\d\\d?\\d?\\.\\d\\d?\\d?\\s)?",
1852 FALSE, TRUE);
1853
1854 #ifdef WHITELIST_D_MACROS
1855 /* Precompile the regular expression used to filter the content of macros
1856 given to -D for permissibility. */
1857
1858 regex_whitelisted_macro =
1859 regex_must_compile(US"^[A-Za-z0-9_/.-]*$", FALSE, TRUE);
1860 #endif
1861
1862 for (i = 0; i < REGEX_VARS; i++) regex_vars[i] = NULL;
1863
1864 /* If the program is called as "mailq" treat it as equivalent to "exim -bp";
1865 this seems to be a generally accepted convention, since one finds symbolic
1866 links called "mailq" in standard OS configurations. */
1867
1868 if ((namelen == 5 && Ustrcmp(argv[0], "mailq") == 0) ||
1869 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/mailq", 6) == 0))
1870 {
1871 list_queue = TRUE;
1872 receiving_message = FALSE;
1873 called_as = US"-mailq";
1874 }
1875
1876 /* If the program is called as "rmail" treat it as equivalent to
1877 "exim -i -oee", thus allowing UUCP messages to be input using non-SMTP mode,
1878 i.e. preventing a single dot on a line from terminating the message, and
1879 returning with zero return code, even in cases of error (provided an error
1880 message has been sent). */
1881
1882 if ((namelen == 5 && Ustrcmp(argv[0], "rmail") == 0) ||
1883 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/rmail", 6) == 0))
1884 {
1885 f.dot_ends = FALSE;
1886 called_as = US"-rmail";
1887 errors_sender_rc = EXIT_SUCCESS;
1888 }
1889
1890 /* If the program is called as "rsmtp" treat it as equivalent to "exim -bS";
1891 this is a smail convention. */
1892
1893 if ((namelen == 5 && Ustrcmp(argv[0], "rsmtp") == 0) ||
1894 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/rsmtp", 6) == 0))
1895 {
1896 smtp_input = smtp_batched_input = TRUE;
1897 called_as = US"-rsmtp";
1898 }
1899
1900 /* If the program is called as "runq" treat it as equivalent to "exim -q";
1901 this is a smail convention. */
1902
1903 if ((namelen == 4 && Ustrcmp(argv[0], "runq") == 0) ||
1904 (namelen > 4 && Ustrncmp(argv[0] + namelen - 5, "/runq", 5) == 0))
1905 {
1906 queue_interval = 0;
1907 receiving_message = FALSE;
1908 called_as = US"-runq";
1909 }
1910
1911 /* If the program is called as "newaliases" treat it as equivalent to
1912 "exim -bi"; this is a sendmail convention. */
1913
1914 if ((namelen == 10 && Ustrcmp(argv[0], "newaliases") == 0) ||
1915 (namelen > 10 && Ustrncmp(argv[0] + namelen - 11, "/newaliases", 11) == 0))
1916 {
1917 bi_option = TRUE;
1918 receiving_message = FALSE;
1919 called_as = US"-newaliases";
1920 }
1921
1922 /* Save the original effective uid for a couple of uses later. It should
1923 normally be root, but in some esoteric environments it may not be. */
1924
1925 original_euid = geteuid();
1926 original_egid = getegid();
1927
1928 /* Get the real uid and gid. If the caller is root, force the effective uid/gid
1929 to be the same as the real ones. This makes a difference only if Exim is setuid
1930 (or setgid) to something other than root, which could be the case in some
1931 special configurations. */
1932
1933 real_uid = getuid();
1934 real_gid = getgid();
1935
1936 if (real_uid == root_uid)
1937 {
1938 if ((rv = setgid(real_gid)))
1939 exim_fail("exim: setgid(%ld) failed: %s\n",
1940 (long int)real_gid, strerror(errno));
1941 if ((rv = setuid(real_uid)))
1942 exim_fail("exim: setuid(%ld) failed: %s\n",
1943 (long int)real_uid, strerror(errno));
1944 }
1945
1946 /* If neither the original real uid nor the original euid was root, Exim is
1947 running in an unprivileged state. */
1948
1949 unprivileged = (real_uid != root_uid && original_euid != root_uid);
1950
1951 /* Scan the program's arguments. Some can be dealt with right away; others are
1952 simply recorded for checking and handling afterwards. Do a high-level switch
1953 on the second character (the one after '-'), to save some effort. */
1954
1955 for (i = 1; i < argc; i++)
1956 {
1957 BOOL badarg = FALSE;
1958 uschar *arg = argv[i];
1959 uschar *argrest;
1960 int switchchar;
1961
1962 /* An argument not starting with '-' is the start of a recipients list;
1963 break out of the options-scanning loop. */
1964
1965 if (arg[0] != '-')
1966 {
1967 recipients_arg = i;
1968 break;
1969 }
1970
1971 /* An option consisting of -- terminates the options */
1972
1973 if (Ustrcmp(arg, "--") == 0)
1974 {
1975 recipients_arg = i + 1;
1976 break;
1977 }
1978
1979 /* Handle flagged options */
1980
1981 switchchar = arg[1];
1982 argrest = arg+2;
1983
1984 /* Make all -ex options synonymous with -oex arguments, since that
1985 is assumed by various callers. Also make -qR options synonymous with -R
1986 options, as that seems to be required as well. Allow for -qqR too, and
1987 the same for -S options. */
1988
1989 if (Ustrncmp(arg+1, "oe", 2) == 0 ||
1990 Ustrncmp(arg+1, "qR", 2) == 0 ||
1991 Ustrncmp(arg+1, "qS", 2) == 0)
1992 {
1993 switchchar = arg[2];
1994 argrest++;
1995 }
1996 else if (Ustrncmp(arg+1, "qqR", 3) == 0 || Ustrncmp(arg+1, "qqS", 3) == 0)
1997 {
1998 switchchar = arg[3];
1999 argrest += 2;
2000 f.queue_2stage = TRUE;
2001 }
2002
2003 /* Make -r synonymous with -f, since it is a documented alias */
2004
2005 else if (arg[1] == 'r') switchchar = 'f';
2006
2007 /* Make -ov synonymous with -v */
2008
2009 else if (Ustrcmp(arg, "-ov") == 0)
2010 {
2011 switchchar = 'v';
2012 argrest++;
2013 }
2014
2015 /* deal with --option_aliases */
2016 else if (switchchar == '-')
2017 {
2018 if (Ustrcmp(argrest, "help") == 0)
2019 {
2020 usage_wanted = TRUE;
2021 break;
2022 }
2023 else if (Ustrcmp(argrest, "version") == 0)
2024 {
2025 switchchar = 'b';
2026 argrest = US"V";
2027 }
2028 }
2029
2030 /* High-level switch on active initial letter */
2031
2032 switch(switchchar)
2033 {
2034
2035 /* sendmail uses -Ac and -Am to control which .cf file is used;
2036 we ignore them. */
2037 case 'A':
2038 if (*argrest == '\0') { badarg = TRUE; break; }
2039 else
2040 {
2041 BOOL ignore = FALSE;
2042 switch (*argrest)
2043 {
2044 case 'c':
2045 case 'm':
2046 if (*(argrest + 1) == '\0')
2047 ignore = TRUE;
2048 break;
2049 }
2050 if (!ignore) badarg = TRUE;
2051 }
2052 break;
2053
2054 /* -Btype is a sendmail option for 7bit/8bit setting. Exim is 8-bit clean
2055 so has no need of it. */
2056
2057 case 'B':
2058 if (!*argrest) i++; /* Skip over the type */
2059 break;
2060
2061
2062 case 'b':
2063 {
2064 receiving_message = FALSE; /* Reset TRUE for -bm, -bS, -bs below */
2065
2066 switch (*argrest++)
2067 {
2068 /* -bd: Run in daemon mode, awaiting SMTP connections.
2069 -bdf: Ditto, but in the foreground.
2070 */
2071 case 'd':
2072 f.daemon_listen = TRUE;
2073 if (*argrest == 'f') f.background_daemon = FALSE;
2074 else if (*argrest) badarg = TRUE;
2075 break;
2076
2077 /* -be: Run in expansion test mode
2078 -bem: Ditto, but read a message from a file first
2079 */
2080 case 'e':
2081 expansion_test = checking = TRUE;
2082 if (*argrest == 'm')
2083 {
2084 if (++i >= argc) { badarg = TRUE; break; }
2085 expansion_test_message = argv[i];
2086 argrest++;
2087 }
2088 if (*argrest) badarg = TRUE;
2089 break;
2090
2091 /* -bF: Run system filter test */
2092 case 'F':
2093 filter_test |= checking = FTEST_SYSTEM;
2094 if (*argrest) { badarg = TRUE; break; }
2095 if (++i < argc) filter_test_sfile = argv[i]; else
2096 exim_fail("exim: file name expected after %s\n", argv[i-1]);
2097 break;
2098
2099 /* -bf: Run user filter test
2100 -bfd: Set domain for filter testing
2101 -bfl: Set local part for filter testing
2102 -bfp: Set prefix for filter testing
2103 -bfs: Set suffix for filter testing
2104 */
2105 case 'f':
2106 if (!*argrest)
2107 {
2108 filter_test |= checking = FTEST_USER;
2109 if (++i < argc) filter_test_ufile = argv[i];
2110 else exim_fail("exim: file name expected after %s\n", argv[i-1]);
2111 }
2112 else
2113 {
2114 if (++i >= argc)
2115 exim_fail("exim: string expected after %s\n", arg);
2116 if (Ustrcmp(argrest, "d") == 0) ftest_domain = argv[i];
2117 else if (Ustrcmp(argrest, "l") == 0) ftest_localpart = argv[i];
2118 else if (Ustrcmp(argrest, "p") == 0) ftest_prefix = argv[i];
2119 else if (Ustrcmp(argrest, "s") == 0) ftest_suffix = argv[i];
2120 else badarg = TRUE;
2121 }
2122 break;
2123
2124 /* -bh: Host checking - an IP address must follow. */
2125 case 'h':
2126 if (!*argrest || Ustrcmp(argrest, "c") == 0)
2127 {
2128 if (++i >= argc) { badarg = TRUE; break; }
2129 sender_host_address = argv[i];
2130 host_checking = checking = f.log_testing_mode = TRUE;
2131 f.host_checking_callout = *argrest == 'c';
2132 message_logs = FALSE;
2133 }
2134 else badarg = TRUE;
2135 break;
2136
2137 /* -bi: This option is used by sendmail to initialize *the* alias file,
2138 though it has the -oA option to specify a different file. Exim has no
2139 concept of *the* alias file, but since Sun's YP make script calls
2140 sendmail this way, some support must be provided. */
2141 case 'i':
2142 if (!*++argrest) bi_option = TRUE;
2143 else badarg = TRUE;
2144 break;
2145
2146 /* -bI: provide information, of the type to follow after a colon.
2147 This is an Exim flag. */
2148 case 'I':
2149 if (Ustrlen(argrest) >= 1 && *argrest == ':')
2150 {
2151 uschar *p = argrest+1;
2152 info_flag = CMDINFO_HELP;
2153 if (Ustrlen(p))
2154 if (strcmpic(p, CUS"sieve") == 0)
2155 {
2156 info_flag = CMDINFO_SIEVE;
2157 info_stdout = TRUE;
2158 }
2159 else if (strcmpic(p, CUS"dscp") == 0)
2160 {
2161 info_flag = CMDINFO_DSCP;
2162 info_stdout = TRUE;
2163 }
2164 else if (strcmpic(p, CUS"help") == 0)
2165 info_stdout = TRUE;
2166 }
2167 else badarg = TRUE;
2168 break;
2169
2170 /* -bm: Accept and deliver message - the default option. Reinstate
2171 receiving_message, which got turned off for all -b options.
2172 -bmalware: test the filename given for malware */
2173 case 'm':
2174 if (!*argrest) receiving_message = TRUE;
2175 else if (Ustrcmp(argrest, "alware") == 0)
2176 {
2177 if (++i >= argc) { badarg = TRUE; break; }
2178 checking = TRUE;
2179 malware_test_file = argv[i];
2180 }
2181 else badarg = TRUE;
2182 break;
2183
2184 /* -bnq: For locally originating messages, do not qualify unqualified
2185 addresses. In the envelope, this causes errors; in header lines they
2186 just get left. */
2187 case 'n':
2188 if (Ustrcmp(argrest, "q") == 0)
2189 {
2190 f.allow_unqualified_sender = FALSE;
2191 f.allow_unqualified_recipient = FALSE;
2192 }
2193 else badarg = TRUE;
2194 break;
2195
2196 /* -bpxx: List the contents of the mail queue, in various forms. If
2197 the option is -bpc, just a queue count is needed. Otherwise, if the
2198 first letter after p is r, then order is random. */
2199 case 'p':
2200 if (*argrest == 'c')
2201 {
2202 count_queue = TRUE;
2203 if (*++argrest) badarg = TRUE;
2204 break;
2205 }
2206
2207 if (*argrest == 'r')
2208 {
2209 list_queue_option = 8;
2210 argrest++;
2211 }
2212 else list_queue_option = 0;
2213
2214 list_queue = TRUE;
2215
2216 /* -bp: List the contents of the mail queue, top-level only */
2217
2218 if (!*argrest) {}
2219
2220 /* -bpu: List the contents of the mail queue, top-level undelivered */
2221
2222 else if (Ustrcmp(argrest, "u") == 0) list_queue_option += 1;
2223
2224 /* -bpa: List the contents of the mail queue, including all delivered */
2225
2226 else if (Ustrcmp(argrest, "a") == 0) list_queue_option += 2;
2227
2228 /* Unknown after -bp[r] */
2229
2230 else badarg = TRUE;
2231 break;
2232
2233
2234 /* -bP: List the configuration variables given as the address list.
2235 Force -v, so configuration errors get displayed. */
2236 case 'P':
2237
2238 /* -bP config: we need to setup here, because later,
2239 * when list_options is checked, the config is read already */
2240 if (*argrest)
2241 badarg = TRUE;
2242 else if (argv[i+1] && Ustrcmp(argv[i+1], "config") == 0)
2243 {
2244 list_config = TRUE;
2245 readconf_save_config(version_string);
2246 }
2247 else
2248 {
2249 list_options = TRUE;
2250 debug_selector |= D_v;
2251 debug_file = stderr;
2252 }
2253 break;
2254
2255 /* -brt: Test retry configuration lookup */
2256 case 'r':
2257 if (Ustrcmp(argrest, "t") == 0)
2258 {
2259 checking = TRUE;
2260 test_retry_arg = i + 1;
2261 goto END_ARG;
2262 }
2263
2264 /* -brw: Test rewrite configuration */
2265
2266 else if (Ustrcmp(argrest, "w") == 0)
2267 {
2268 checking = TRUE;
2269 test_rewrite_arg = i + 1;
2270 goto END_ARG;
2271 }
2272 else badarg = TRUE;
2273 break;
2274
2275 /* -bS: Read SMTP commands on standard input, but produce no replies -
2276 all errors are reported by sending messages. */
2277 case 'S':
2278 if (!*argrest)
2279 smtp_input = smtp_batched_input = receiving_message = TRUE;
2280 else badarg = TRUE;
2281 break;
2282
2283 /* -bs: Read SMTP commands on standard input and produce SMTP replies
2284 on standard output. */
2285 case 's':
2286 if (!*argrest) smtp_input = receiving_message = TRUE;
2287 else badarg = TRUE;
2288 break;
2289
2290 /* -bt: address testing mode */
2291 case 't':
2292 if (!*argrest)
2293 f.address_test_mode = checking = f.log_testing_mode = TRUE;
2294 else badarg = TRUE;
2295 break;
2296
2297 /* -bv: verify addresses */
2298 case 'v':
2299 if (!*argrest)
2300 verify_address_mode = checking = f.log_testing_mode = TRUE;
2301
2302 /* -bvs: verify sender addresses */
2303
2304 else if (Ustrcmp(argrest, "s") == 0)
2305 {
2306 verify_address_mode = checking = f.log_testing_mode = TRUE;
2307 verify_as_sender = TRUE;
2308 }
2309 else badarg = TRUE;
2310 break;
2311
2312 /* -bV: Print version string and support details */
2313 case 'V':
2314 if (!*argrest)
2315 {
2316 printf("Exim version %s #%s built %s\n", version_string,
2317 version_cnumber, version_date);
2318 printf("%s\n", CS version_copyright);
2319 version_printed = TRUE;
2320 show_whats_supported(stdout);
2321 f.log_testing_mode = TRUE;
2322 }
2323 else badarg = TRUE;
2324 break;
2325
2326 /* -bw: inetd wait mode, accept a listening socket as stdin */
2327 case 'w':
2328 f.inetd_wait_mode = TRUE;
2329 f.background_daemon = FALSE;
2330 f.daemon_listen = TRUE;
2331 if (*argrest)
2332 if ((inetd_wait_timeout = readconf_readtime(argrest, 0, FALSE)) <= 0)
2333 exim_fail("exim: bad time value %s: abandoned\n", argv[i]);
2334 break;
2335
2336 default:
2337 badarg = TRUE;
2338 break;
2339 }
2340 break;
2341 }
2342
2343
2344 /* -C: change configuration file list; ignore if it isn't really
2345 a change! Enforce a prefix check if required. */
2346
2347 case 'C':
2348 if (*argrest == 0)
2349 {
2350 if(++i < argc) argrest = argv[i]; else
2351 { badarg = TRUE; break; }
2352 }
2353 if (Ustrcmp(config_main_filelist, argrest) != 0)
2354 {
2355 #ifdef ALT_CONFIG_PREFIX
2356 int sep = 0;
2357 int len = Ustrlen(ALT_CONFIG_PREFIX);
2358 const uschar *list = argrest;
2359 uschar *filename;
2360 while((filename = string_nextinlist(&list, &sep, big_buffer,
2361 big_buffer_size)) != NULL)
2362 {
2363 if ((Ustrlen(filename) < len ||
2364 Ustrncmp(filename, ALT_CONFIG_PREFIX, len) != 0 ||
2365 Ustrstr(filename, "/../") != NULL) &&
2366 (Ustrcmp(filename, "/dev/null") != 0 || real_uid != root_uid))
2367 exim_fail("-C Permission denied\n");
2368 }
2369 #endif
2370 if (real_uid != root_uid)
2371 {
2372 #ifdef TRUSTED_CONFIG_LIST
2373
2374 if (real_uid != exim_uid
2375 #ifdef CONFIGURE_OWNER
2376 && real_uid != config_uid
2377 #endif
2378 )
2379 f.trusted_config = FALSE;
2380 else
2381 {
2382 FILE *trust_list = Ufopen(TRUSTED_CONFIG_LIST, "rb");
2383 if (trust_list)
2384 {
2385 struct stat statbuf;
2386
2387 if (fstat(fileno(trust_list), &statbuf) != 0 ||
2388 (statbuf.st_uid != root_uid /* owner not root */
2389 #ifdef CONFIGURE_OWNER
2390 && statbuf.st_uid != config_uid /* owner not the special one */
2391 #endif
2392 ) || /* or */
2393 (statbuf.st_gid != root_gid /* group not root */
2394 #ifdef CONFIGURE_GROUP
2395 && statbuf.st_gid != config_gid /* group not the special one */
2396 #endif
2397 && (statbuf.st_mode & 020) != 0 /* group writeable */
2398 ) || /* or */
2399 (statbuf.st_mode & 2) != 0) /* world writeable */
2400 {
2401 f.trusted_config = FALSE;
2402 fclose(trust_list);
2403 }
2404 else
2405 {
2406 /* Well, the trust list at least is up to scratch... */
2407 rmark reset_point = store_mark();
2408 uschar *trusted_configs[32];
2409 int nr_configs = 0;
2410 int i = 0;
2411
2412 while (Ufgets(big_buffer, big_buffer_size, trust_list))
2413 {
2414 uschar *start = big_buffer, *nl;
2415 while (*start && isspace(*start))
2416 start++;
2417 if (*start != '/')
2418 continue;
2419 nl = Ustrchr(start, '\n');
2420 if (nl)
2421 *nl = 0;
2422 trusted_configs[nr_configs++] = string_copy(start);
2423 if (nr_configs == 32)
2424 break;
2425 }
2426 fclose(trust_list);
2427
2428 if (nr_configs)
2429 {
2430 int sep = 0;
2431 const uschar *list = argrest;
2432 uschar *filename;
2433 while (f.trusted_config && (filename = string_nextinlist(&list,
2434 &sep, big_buffer, big_buffer_size)) != NULL)
2435 {
2436 for (i=0; i < nr_configs; i++)
2437 if (Ustrcmp(filename, trusted_configs[i]) == 0)
2438 break;
2439 if (i == nr_configs)
2440 {
2441 f.trusted_config = FALSE;
2442 break;
2443 }
2444 }
2445 }
2446 else /* No valid prefixes found in trust_list file. */
2447 f.trusted_config = FALSE;
2448 store_reset(reset_point);
2449 }
2450 }
2451 else /* Could not open trust_list file. */
2452 f.trusted_config = FALSE;
2453 }
2454 #else
2455 /* Not root; don't trust config */
2456 f.trusted_config = FALSE;
2457 #endif
2458 }
2459
2460 config_main_filelist = argrest;
2461 f.config_changed = TRUE;
2462 }
2463 break;
2464
2465
2466 /* -D: set up a macro definition */
2467
2468 case 'D':
2469 #ifdef DISABLE_D_OPTION
2470 exim_fail("exim: -D is not available in this Exim binary\n");
2471 #else
2472 {
2473 int ptr = 0;
2474 macro_item *m;
2475 uschar name[24];
2476 uschar *s = argrest;
2477
2478 opt_D_used = TRUE;
2479 while (isspace(*s)) s++;
2480
2481 if (*s < 'A' || *s > 'Z')
2482 exim_fail("exim: macro name set by -D must start with "
2483 "an upper case letter\n");
2484
2485 while (isalnum(*s) || *s == '_')
2486 {
2487 if (ptr < sizeof(name)-1) name[ptr++] = *s;
2488 s++;
2489 }
2490 name[ptr] = 0;
2491 if (ptr == 0) { badarg = TRUE; break; }
2492 while (isspace(*s)) s++;
2493 if (*s != 0)
2494 {
2495 if (*s++ != '=') { badarg = TRUE; break; }
2496 while (isspace(*s)) s++;
2497 }
2498
2499 for (m = macros_user; m; m = m->next)
2500 if (Ustrcmp(m->name, name) == 0)
2501 exim_fail("exim: duplicated -D in command line\n");
2502
2503 m = macro_create(name, s, TRUE);
2504
2505 if (clmacro_count >= MAX_CLMACROS)
2506 exim_fail("exim: too many -D options on command line\n");
2507 clmacros[clmacro_count++] =
2508 string_sprintf("-D%s=%s", m->name, m->replacement);
2509 }
2510 #endif
2511 break;
2512
2513 /* -d: Set debug level (see also -v below) or set the drop_cr option.
2514 The latter is now a no-op, retained for compatibility only. If -dd is used,
2515 debugging subprocesses of the daemon is disabled. */
2516
2517 case 'd':
2518 if (Ustrcmp(argrest, "ropcr") == 0)
2519 {
2520 /* drop_cr = TRUE; */
2521 }
2522
2523 /* Use an intermediate variable so that we don't set debugging while
2524 decoding the debugging bits. */
2525
2526 else
2527 {
2528 unsigned int selector = D_default;
2529 debug_selector = 0;
2530 debug_file = NULL;
2531 if (*argrest == 'd')
2532 {
2533 f.debug_daemon = TRUE;
2534 argrest++;
2535 }
2536 if (*argrest != 0)
2537 decode_bits(&selector, 1, debug_notall, argrest,
2538 debug_options, debug_options_count, US"debug", 0);
2539 debug_selector = selector;
2540 }
2541 break;
2542
2543
2544 /* -E: This is a local error message. This option is not intended for
2545 external use at all, but is not restricted to trusted callers because it
2546 does no harm (just suppresses certain error messages) and if Exim is run
2547 not setuid root it won't always be trusted when it generates error
2548 messages using this option. If there is a message id following -E, point
2549 message_reference at it, for logging. */
2550
2551 case 'E':
2552 f.local_error_message = TRUE;
2553 if (mac_ismsgid(argrest)) message_reference = argrest;
2554 break;
2555
2556
2557 /* -ex: The vacation program calls sendmail with the undocumented "-eq"
2558 option, so it looks as if historically the -oex options are also callable
2559 without the leading -o. So we have to accept them. Before the switch,
2560 anything starting -oe has been converted to -e. Exim does not support all
2561 of the sendmail error options. */
2562
2563 case 'e':
2564 if (Ustrcmp(argrest, "e") == 0)
2565 {
2566 arg_error_handling = ERRORS_SENDER;
2567 errors_sender_rc = EXIT_SUCCESS;
2568 }
2569 else if (Ustrcmp(argrest, "m") == 0) arg_error_handling = ERRORS_SENDER;
2570 else if (Ustrcmp(argrest, "p") == 0) arg_error_handling = ERRORS_STDERR;
2571 else if (Ustrcmp(argrest, "q") == 0) arg_error_handling = ERRORS_STDERR;
2572 else if (Ustrcmp(argrest, "w") == 0) arg_error_handling = ERRORS_SENDER;
2573 else badarg = TRUE;
2574 break;
2575
2576
2577 /* -F: Set sender's full name, used instead of the gecos entry from
2578 the password file. Since users can usually alter their gecos entries,
2579 there's no security involved in using this instead. The data can follow
2580 the -F or be in the next argument. */
2581
2582 case 'F':
2583 if (*argrest == 0)
2584 {
2585 if(++i < argc) argrest = argv[i]; else
2586 { badarg = TRUE; break; }
2587 }
2588 originator_name = argrest;
2589 f.sender_name_forced = TRUE;
2590 break;
2591
2592
2593 /* -f: Set sender's address - this value is only actually used if Exim is
2594 run by a trusted user, or if untrusted_set_sender is set and matches the
2595 address, except that the null address can always be set by any user. The
2596 test for this happens later, when the value given here is ignored when not
2597 permitted. For an untrusted user, the actual sender is still put in Sender:
2598 if it doesn't match the From: header (unless no_local_from_check is set).
2599 The data can follow the -f or be in the next argument. The -r switch is an
2600 obsolete form of -f but since there appear to be programs out there that
2601 use anything that sendmail has ever supported, better accept it - the
2602 synonymizing is done before the switch above.
2603
2604 At this stage, we must allow domain literal addresses, because we don't
2605 know what the setting of allow_domain_literals is yet. Ditto for trailing
2606 dots and strip_trailing_dot. */
2607
2608 case 'f':
2609 {
2610 int dummy_start, dummy_end;
2611 uschar *errmess;
2612 if (*argrest == 0)
2613 {
2614 if (i+1 < argc) argrest = argv[++i]; else
2615 { badarg = TRUE; break; }
2616 }
2617 if (*argrest == 0)
2618 *(sender_address = store_get(1, FALSE)) = '\0'; /* Ensure writeable memory */
2619 else
2620 {
2621 uschar *temp = argrest + Ustrlen(argrest) - 1;
2622 while (temp >= argrest && isspace(*temp)) temp--;
2623 if (temp >= argrest && *temp == '.') f_end_dot = TRUE;
2624 allow_domain_literals = TRUE;
2625 strip_trailing_dot = TRUE;
2626 #ifdef SUPPORT_I18N
2627 allow_utf8_domains = TRUE;
2628 #endif
2629 sender_address = parse_extract_address(argrest, &errmess,
2630 &dummy_start, &dummy_end, &sender_address_domain, TRUE);
2631 sender_address = string_copy_taint(sender_address, TRUE);
2632 #ifdef SUPPORT_I18N
2633 message_smtputf8 = string_is_utf8(sender_address);
2634 allow_utf8_domains = FALSE;
2635 #endif
2636 allow_domain_literals = FALSE;
2637 strip_trailing_dot = FALSE;
2638 if (!sender_address)
2639 exim_fail("exim: bad -f address \"%s\": %s\n", argrest, errmess);
2640 }
2641 f.sender_address_forced = TRUE;
2642 }
2643 break;
2644
2645 /* -G: sendmail invocation to specify that it's a gateway submission and
2646 sendmail may complain about problems instead of fixing them.
2647 We make it equivalent to an ACL "control = suppress_local_fixups" and do
2648 not at this time complain about problems. */
2649
2650 case 'G':
2651 flag_G = TRUE;
2652 break;
2653
2654 /* -h: Set the hop count for an incoming message. Exim does not currently
2655 support this; it always computes it by counting the Received: headers.
2656 To put it in will require a change to the spool header file format. */
2657
2658 case 'h':
2659 if (*argrest == 0)
2660 {
2661 if(++i < argc) argrest = argv[i]; else
2662 { badarg = TRUE; break; }
2663 }
2664 if (!isdigit(*argrest)) badarg = TRUE;
2665 break;
2666
2667
2668 /* -i: Set flag so dot doesn't end non-SMTP input (same as -oi, seems
2669 not to be documented for sendmail but mailx (at least) uses it) */
2670
2671 case 'i':
2672 if (*argrest == 0) f.dot_ends = FALSE; else badarg = TRUE;
2673 break;
2674
2675
2676 /* -L: set the identifier used for syslog; equivalent to setting
2677 syslog_processname in the config file, but needs to be an admin option. */
2678
2679 case 'L':
2680 if (*argrest == '\0')
2681 {
2682 if(++i < argc) argrest = argv[i]; else
2683 { badarg = TRUE; break; }
2684 }
2685 if ((sz = Ustrlen(argrest)) > 32)
2686 exim_fail("exim: the -L syslog name is too long: \"%s\"\n", argrest);
2687 if (sz < 1)
2688 exim_fail("exim: the -L syslog name is too short\n");
2689 cmdline_syslog_name = argrest;
2690 break;
2691
2692 case 'M':
2693 receiving_message = FALSE;
2694
2695 /* -MC: continue delivery of another message via an existing open
2696 file descriptor. This option is used for an internal call by the
2697 smtp transport when there is a pending message waiting to go to an
2698 address to which it has got a connection. Five subsequent arguments are
2699 required: transport name, host name, IP address, sequence number, and
2700 message_id. Transports may decline to create new processes if the sequence
2701 number gets too big. The channel is stdin. This (-MC) must be the last
2702 argument. There's a subsequent check that the real-uid is privileged.
2703
2704 If we are running in the test harness. delay for a bit, to let the process
2705 that set this one up complete. This makes for repeatability of the logging,
2706 etc. output. */
2707
2708 if (Ustrcmp(argrest, "C") == 0)
2709 {
2710 union sockaddr_46 interface_sock;
2711 EXIM_SOCKLEN_T size = sizeof(interface_sock);
2712
2713 if (argc != i + 6)
2714 exim_fail("exim: too many or too few arguments after -MC\n");
2715
2716 if (msg_action_arg >= 0)
2717 exim_fail("exim: incompatible arguments\n");
2718
2719 continue_transport = argv[++i];
2720 continue_hostname = argv[++i];
2721 continue_host_address = argv[++i];
2722 continue_sequence = Uatoi(argv[++i]);
2723 msg_action = MSG_DELIVER;
2724 msg_action_arg = ++i;
2725 forced_delivery = TRUE;
2726 queue_run_pid = passed_qr_pid;
2727 queue_run_pipe = passed_qr_pipe;
2728
2729 if (!mac_ismsgid(argv[i]))
2730 exim_fail("exim: malformed message id %s after -MC option\n",
2731 argv[i]);
2732
2733 /* Set up $sending_ip_address and $sending_port, unless proxied */
2734
2735 if (!continue_proxy_cipher)
2736 if (getsockname(fileno(stdin), (struct sockaddr *)(&interface_sock),
2737 &size) == 0)
2738 sending_ip_address = host_ntoa(-1, &interface_sock, NULL,
2739 &sending_port);
2740 else
2741 exim_fail("exim: getsockname() failed after -MC option: %s\n",
2742 strerror(errno));
2743
2744 testharness_pause_ms(500);
2745 break;
2746 }
2747
2748 else if (*argrest == 'C' && argrest[1] && !argrest[2])
2749 {
2750 switch(argrest[1])
2751 {
2752 /* -MCA: set the smtp_authenticated flag; this is useful only when it
2753 precedes -MC (see above). The flag indicates that the host to which
2754 Exim is connected has accepted an AUTH sequence. */
2755
2756 case 'A': f.smtp_authenticated = TRUE; break;
2757
2758 /* -MCD: set the smtp_use_dsn flag; this indicates that the host
2759 that exim is connected to supports the esmtp extension DSN */
2760
2761 case 'D': smtp_peer_options |= OPTION_DSN; break;
2762
2763 /* -MCd: for debug, set a process-purpose string */
2764
2765 case 'd': if (++i < argc) process_purpose = argv[i];
2766 else badarg = TRUE;
2767 break;
2768
2769 /* -MCG: set the queue name, to a non-default value */
2770
2771 case 'G': if (++i < argc) queue_name = string_copy(argv[i]);
2772 else badarg = TRUE;
2773 break;
2774
2775 /* -MCK: the peer offered CHUNKING. Must precede -MC */
2776
2777 case 'K': smtp_peer_options |= OPTION_CHUNKING; break;
2778
2779 /* -MCP: set the smtp_use_pipelining flag; this is useful only when
2780 it preceded -MC (see above) */
2781
2782 case 'P': smtp_peer_options |= OPTION_PIPE; break;
2783
2784 /* -MCQ: pass on the pid of the queue-running process that started
2785 this chain of deliveries and the fd of its synchronizing pipe; this
2786 is useful only when it precedes -MC (see above) */
2787
2788 case 'Q': if (++i < argc) passed_qr_pid = (pid_t)(Uatol(argv[i]));
2789 else badarg = TRUE;
2790 if (++i < argc) passed_qr_pipe = (int)(Uatol(argv[i]));
2791 else badarg = TRUE;
2792 break;
2793
2794 /* -MCS: set the smtp_use_size flag; this is useful only when it
2795 precedes -MC (see above) */
2796
2797 case 'S': smtp_peer_options |= OPTION_SIZE; break;
2798
2799 #ifndef DISABLE_TLS
2800 /* -MCt: similar to -MCT below but the connection is still open
2801 via a proxy process which handles the TLS context and coding.
2802 Require three arguments for the proxied local address and port,
2803 and the TLS cipher. */
2804
2805 case 't': if (++i < argc) sending_ip_address = argv[i];
2806 else badarg = TRUE;
2807 if (++i < argc) sending_port = (int)(Uatol(argv[i]));
2808 else badarg = TRUE;
2809 if (++i < argc) continue_proxy_cipher = argv[i];
2810 else badarg = TRUE;
2811 /*FALLTHROUGH*/
2812
2813 /* -MCT: set the tls_offered flag; this is useful only when it
2814 precedes -MC (see above). The flag indicates that the host to which
2815 Exim is connected has offered TLS support. */
2816
2817 case 'T': smtp_peer_options |= OPTION_TLS; break;
2818 #endif
2819
2820 default: badarg = TRUE; break;
2821 }
2822 break;
2823 }
2824
2825 /* -M[x]: various operations on the following list of message ids:
2826 -M deliver the messages, ignoring next retry times and thawing
2827 -Mc deliver the messages, checking next retry times, no thawing
2828 -Mf freeze the messages
2829 -Mg give up on the messages
2830 -Mt thaw the messages
2831 -Mrm remove the messages
2832 In the above cases, this must be the last option. There are also the
2833 following options which are followed by a single message id, and which
2834 act on that message. Some of them use the "recipient" addresses as well.
2835 -Mar add recipient(s)
2836 -Mmad mark all recipients delivered
2837 -Mmd mark recipients(s) delivered
2838 -Mes edit sender
2839 -Mset load a message for use with -be
2840 -Mvb show body
2841 -Mvc show copy (of whole message, in RFC 2822 format)
2842 -Mvh show header
2843 -Mvl show log
2844 */
2845
2846 else if (*argrest == 0)
2847 {
2848 msg_action = MSG_DELIVER;
2849 forced_delivery = f.deliver_force_thaw = TRUE;
2850 }
2851 else if (Ustrcmp(argrest, "ar") == 0)
2852 {
2853 msg_action = MSG_ADD_RECIPIENT;
2854 one_msg_action = TRUE;
2855 }
2856 else if (Ustrcmp(argrest, "c") == 0) msg_action = MSG_DELIVER;
2857 else if (Ustrcmp(argrest, "es") == 0)
2858 {
2859 msg_action = MSG_EDIT_SENDER;
2860 one_msg_action = TRUE;
2861 }
2862 else if (Ustrcmp(argrest, "f") == 0) msg_action = MSG_FREEZE;
2863 else if (Ustrcmp(argrest, "g") == 0)
2864 {
2865 msg_action = MSG_DELIVER;
2866 deliver_give_up = TRUE;
2867 }
2868 else if (Ustrcmp(argrest, "G") == 0)
2869 {
2870 msg_action = MSG_SETQUEUE;
2871 queue_name_dest = argv[++i];
2872 }
2873 else if (Ustrcmp(argrest, "mad") == 0)
2874 {
2875 msg_action = MSG_MARK_ALL_DELIVERED;
2876 }
2877 else if (Ustrcmp(argrest, "md") == 0)
2878 {
2879 msg_action = MSG_MARK_DELIVERED;
2880 one_msg_action = TRUE;
2881 }
2882 else if (Ustrcmp(argrest, "rm") == 0) msg_action = MSG_REMOVE;
2883 else if (Ustrcmp(argrest, "set") == 0)
2884 {
2885 msg_action = MSG_LOAD;
2886 one_msg_action = TRUE;
2887 }
2888 else if (Ustrcmp(argrest, "t") == 0) msg_action = MSG_THAW;
2889 else if (Ustrcmp(argrest, "vb") == 0)
2890 {
2891 msg_action = MSG_SHOW_BODY;
2892 one_msg_action = TRUE;
2893 }
2894 else if (Ustrcmp(argrest, "vc") == 0)
2895 {
2896 msg_action = MSG_SHOW_COPY;
2897 one_msg_action = TRUE;
2898 }
2899 else if (Ustrcmp(argrest, "vh") == 0)
2900 {
2901 msg_action = MSG_SHOW_HEADER;
2902 one_msg_action = TRUE;
2903 }
2904 else if (Ustrcmp(argrest, "vl") == 0)
2905 {
2906 msg_action = MSG_SHOW_LOG;
2907 one_msg_action = TRUE;
2908 }
2909 else { badarg = TRUE; break; }
2910
2911 /* All the -Mxx options require at least one message id. */
2912
2913 msg_action_arg = i + 1;
2914 if (msg_action_arg >= argc)
2915 exim_fail("exim: no message ids given after %s option\n", arg);
2916
2917 /* Some require only message ids to follow */
2918
2919 if (!one_msg_action)
2920 {
2921 for (int j = msg_action_arg; j < argc; j++) if (!mac_ismsgid(argv[j]))
2922 exim_fail("exim: malformed message id %s after %s option\n",
2923 argv[j], arg);
2924 goto END_ARG; /* Remaining args are ids */
2925 }
2926
2927 /* Others require only one message id, possibly followed by addresses,
2928 which will be handled as normal arguments. */
2929
2930 else
2931 {
2932 if (!mac_ismsgid(argv[msg_action_arg]))
2933 exim_fail("exim: malformed message id %s after %s option\n",
2934 argv[msg_action_arg], arg);
2935 i++;
2936 }
2937 break;
2938
2939
2940 /* Some programs seem to call the -om option without the leading o;
2941 for sendmail it askes for "me too". Exim always does this. */
2942
2943 case 'm':
2944 if (*argrest != 0) badarg = TRUE;
2945 break;
2946
2947
2948 /* -N: don't do delivery - a debugging option that stops transports doing
2949 their thing. It implies debugging at the D_v level. */
2950
2951 case 'N':
2952 if (*argrest == 0)
2953 {
2954 f.dont_deliver = TRUE;
2955 debug_selector |= D_v;
2956 debug_file = stderr;
2957 }
2958 else badarg = TRUE;
2959 break;
2960
2961
2962 /* -n: This means "don't alias" in sendmail, apparently.
2963 For normal invocations, it has no effect.
2964 It may affect some other options. */
2965
2966 case 'n':
2967 flag_n = TRUE;
2968 break;
2969
2970 /* -O: Just ignore it. In sendmail, apparently -O option=value means set
2971 option to the specified value. This form uses long names. We need to handle
2972 -O option=value and -Ooption=value. */
2973
2974 case 'O':
2975 if (*argrest == 0)
2976 if (++i >= argc)
2977 exim_fail("exim: string expected after -O\n");
2978 break;
2979
2980 case 'o':
2981 switch (*argrest++)
2982 {
2983 /* -oA: Set an argument for the bi command (sendmail's "alternate alias
2984 file" option). */
2985 case 'A':
2986 if (!*(alias_arg = argrest))
2987 if (i+1 < argc) alias_arg = argv[++i];
2988 else exim_fail("exim: string expected after -oA\n");
2989 break;
2990
2991 /* -oB: Set a connection message max value for remote deliveries */
2992 case 'B':
2993 {
2994 uschar * p = argrest;
2995 if (!*p)
2996 if (i+1 < argc && isdigit((argv[i+1][0])))
2997 p = argv[++i];
2998 else
2999 {
3000 connection_max_messages = 1;
3001 p = NULL;
3002 }
3003
3004 if (p)
3005 {
3006 if (!isdigit(*p))
3007 exim_fail("exim: number expected after -oB\n");
3008 connection_max_messages = Uatoi(p);
3009 }
3010 }
3011 break;
3012
3013 /* -odb: background delivery */
3014
3015 case 'd':
3016 if (Ustrcmp(argrest, "b") == 0)
3017 {
3018 f.synchronous_delivery = FALSE;
3019 arg_queue_only = FALSE;
3020 queue_only_set = TRUE;
3021 }
3022
3023 /* -odd: testsuite-only: add no inter-process delays */
3024
3025 else if (Ustrcmp(argrest, "d") == 0)
3026 f.testsuite_delays = FALSE;
3027
3028 /* -odf: foreground delivery (smail-compatible option); same effect as
3029 -odi: interactive (synchronous) delivery (sendmail-compatible option)
3030 */
3031
3032 else if (Ustrcmp(argrest, "f") == 0 || Ustrcmp(argrest, "i") == 0)
3033 {
3034 f.synchronous_delivery = TRUE;
3035 arg_queue_only = FALSE;
3036 queue_only_set = TRUE;
3037 }
3038
3039 /* -odq: queue only */
3040
3041 else if (Ustrcmp(argrest, "q") == 0)
3042 {
3043 f.synchronous_delivery = FALSE;
3044 arg_queue_only = TRUE;
3045 queue_only_set = TRUE;
3046 }
3047
3048 /* -odqs: queue SMTP only - do local deliveries and remote routing,
3049 but no remote delivery */
3050
3051 else if (Ustrcmp(argrest, "qs") == 0)
3052 {
3053 f.queue_smtp = TRUE;
3054 arg_queue_only = FALSE;
3055 queue_only_set = TRUE;
3056 }
3057 else badarg = TRUE;
3058 break;
3059
3060 /* -oex: Sendmail error flags. As these are also accepted without the
3061 leading -o prefix, for compatibility with vacation and other callers,
3062 they are handled with -e above. */
3063
3064 /* -oi: Set flag so dot doesn't end non-SMTP input (same as -i)
3065 -oitrue: Another sendmail syntax for the same */
3066
3067 case 'i':
3068 if (!*argrest || Ustrcmp(argrest, "true") == 0)
3069 f.dot_ends = FALSE;
3070 else badarg = TRUE;
3071 break;
3072
3073 /* -oM*: Set various characteristics for an incoming message; actually
3074 acted on for trusted callers only. */
3075
3076 case 'M':
3077 {
3078 if (i+1 >= argc)
3079 exim_fail("exim: data expected after -oM%s\n", argrest);
3080
3081 /* -oMa: Set sender host address */
3082
3083 if (Ustrcmp(argrest, "a") == 0) sender_host_address = argv[++i];
3084
3085 /* -oMaa: Set authenticator name */
3086
3087 else if (Ustrcmp(argrest, "aa") == 0)
3088 sender_host_authenticated = argv[++i];
3089
3090 /* -oMas: setting authenticated sender */
3091
3092 else if (Ustrcmp(argrest, "as") == 0)
3093 authenticated_sender = string_copy_taint(argv[++i], TRUE);
3094
3095 /* -oMai: setting authenticated id */
3096
3097 else if (Ustrcmp(argrest, "ai") == 0)
3098 authenticated_id = string_copy_taint(argv[++i], TRUE);
3099
3100 /* -oMi: Set incoming interface address */
3101
3102 else if (Ustrcmp(argrest, "i") == 0) interface_address = argv[++i];
3103
3104 /* -oMm: Message reference */
3105
3106 else if (Ustrcmp(argrest, "m") == 0)
3107 {
3108 if (!mac_ismsgid(argv[i+1]))
3109 exim_fail("-oMm must be a valid message ID\n");
3110 if (!f.trusted_config)
3111 exim_fail("-oMm must be called by a trusted user/config\n");
3112 message_reference = argv[++i];
3113 }
3114
3115 /* -oMr: Received protocol */
3116
3117 else if (Ustrcmp(argrest, "r") == 0)
3118
3119 if (received_protocol)
3120 exim_fail("received_protocol is set already\n");
3121 else
3122 received_protocol = argv[++i];
3123
3124 /* -oMs: Set sender host name */
3125
3126 else if (Ustrcmp(argrest, "s") == 0)
3127 sender_host_name = string_copy_taint(argv[++i], TRUE);
3128
3129 /* -oMt: Set sender ident */
3130
3131 else if (Ustrcmp(argrest, "t") == 0)
3132 {
3133 sender_ident_set = TRUE;
3134 sender_ident = argv[++i];
3135 }
3136
3137 /* Else a bad argument */
3138
3139 else
3140 badarg = TRUE;
3141 }
3142 break;
3143
3144 /* -om: Me-too flag for aliases. Exim always does this. Some programs
3145 seem to call this as -m (undocumented), so that is also accepted (see
3146 above). */
3147 /* -oo: An ancient flag for old-style addresses which still seems to
3148 crop up in some calls (see in SCO). */
3149
3150 case 'm':
3151 case 'o':
3152 if (*argrest) badarg = TRUE;
3153 break;
3154
3155 /* -oP <name>: set pid file path for daemon
3156 -oPX: delete pid file of daemon */
3157
3158 case 'P':
3159 if (!*argrest) override_pid_file_path = argv[++i];
3160 else if (Ustrcmp(argrest, "X") == 0) delete_pid_file();
3161 else badarg = TRUE;
3162 break;
3163
3164
3165 /* -or <n>: set timeout for non-SMTP acceptance
3166 -os <n>: set timeout for SMTP acceptance */
3167
3168 case 'r':
3169 case 's':
3170 {
3171 int * tp = argrest[-1] == 'r'
3172 ? &arg_receive_timeout : &arg_smtp_receive_timeout;
3173 if (*argrest)
3174 *tp = readconf_readtime(argrest, 0, FALSE);
3175 else if (i+1 < argc)
3176 *tp = readconf_readtime(argv[++i], 0, FALSE);
3177
3178 if (*tp < 0)
3179 exim_fail("exim: bad time value %s: abandoned\n", argv[i]);
3180 }
3181 break;
3182
3183 /* -oX <list>: Override local_interfaces and/or default daemon ports */
3184
3185 case 'X':
3186 if (*argrest) badarg = TRUE;
3187 else override_local_interfaces = argv[++i];
3188 break;
3189
3190 /* Unknown -o argument */
3191
3192 default:
3193 badarg = TRUE;
3194 }
3195 break;
3196
3197
3198 /* -ps: force Perl startup; -pd force delayed Perl startup */
3199
3200 case 'p':
3201 #ifdef EXIM_PERL
3202 if (*argrest == 's' && argrest[1] == 0)
3203 {
3204 perl_start_option = 1;
3205 break;
3206 }
3207 if (*argrest == 'd' && argrest[1] == 0)
3208 {
3209 perl_start_option = -1;
3210 break;
3211 }
3212 #endif
3213
3214 /* -panythingelse is taken as the Sendmail-compatible argument -prval:sval,
3215 which sets the host protocol and host name */
3216
3217 if (*argrest == 0)
3218 if (i+1 < argc)
3219 argrest = argv[++i];
3220 else
3221 { badarg = TRUE; break; }
3222
3223 if (*argrest != 0)
3224 {
3225 uschar *hn;
3226
3227 if (received_protocol)
3228 exim_fail("received_protocol is set already\n");
3229
3230 hn = Ustrchr(argrest, ':');
3231 if (hn == NULL)
3232 received_protocol = argrest;
3233 else
3234 {
3235 int old_pool = store_pool;
3236 store_pool = POOL_PERM;
3237 received_protocol = string_copyn(argrest, hn - argrest);
3238 store_pool = old_pool;
3239 sender_host_name = hn + 1;
3240 }
3241 }
3242 break;
3243
3244
3245 case 'q':
3246 receiving_message = FALSE;
3247 if (queue_interval >= 0)
3248 exim_fail("exim: -q specified more than once\n");
3249
3250 /* -qq...: Do queue runs in a 2-stage manner */
3251
3252 if (*argrest == 'q')
3253 {
3254 f.queue_2stage = TRUE;
3255 argrest++;
3256 }
3257
3258 /* -qi...: Do only first (initial) deliveries */
3259
3260 if (*argrest == 'i')
3261 {
3262 f.queue_run_first_delivery = TRUE;
3263 argrest++;
3264 }
3265
3266 /* -qf...: Run the queue, forcing deliveries
3267 -qff..: Ditto, forcing thawing as well */
3268
3269 if (*argrest == 'f')
3270 {
3271 f.queue_run_force = TRUE;
3272 if (*++argrest == 'f')
3273 {
3274 f.deliver_force_thaw = TRUE;
3275 argrest++;
3276 }
3277 }
3278
3279 /* -q[f][f]l...: Run the queue only on local deliveries */
3280
3281 if (*argrest == 'l')
3282 {
3283 f.queue_run_local = TRUE;
3284 argrest++;
3285 }
3286
3287 /* -q[f][f][l][G<name>]... Work on the named queue */
3288
3289 if (*argrest == 'G')
3290 {
3291 int i;
3292 for (argrest++, i = 0; argrest[i] && argrest[i] != '/'; ) i++;
3293 queue_name = string_copyn(argrest, i);
3294 argrest += i;
3295 if (*argrest == '/') argrest++;
3296 }
3297
3298 /* -q[f][f][l][G<name>]: Run the queue, optionally forced, optionally local
3299 only, optionally named, optionally starting from a given message id. */
3300
3301 if (!(list_queue || count_queue))
3302 if (*argrest == 0
3303 && (i + 1 >= argc || argv[i+1][0] == '-' || mac_ismsgid(argv[i+1])))
3304 {
3305 queue_interval = 0;
3306 if (i+1 < argc && mac_ismsgid(argv[i+1]))
3307 start_queue_run_id = argv[++i];
3308 if (i+1 < argc && mac_ismsgid(argv[i+1]))
3309 stop_queue_run_id = argv[++i];
3310 }
3311
3312 /* -q[f][f][l][G<name>/]<n>: Run the queue at regular intervals, optionally
3313 forced, optionally local only, optionally named. */
3314
3315 else if ((queue_interval = readconf_readtime(*argrest ? argrest : argv[++i],
3316 0, FALSE)) <= 0)
3317 exim_fail("exim: bad time value %s: abandoned\n", argv[i]);
3318 break;
3319
3320
3321 case 'R': /* Synonymous with -qR... */
3322 receiving_message = FALSE;
3323
3324 /* -Rf: As -R (below) but force all deliveries,
3325 -Rff: Ditto, but also thaw all frozen messages,
3326 -Rr: String is regex
3327 -Rrf: Regex and force
3328 -Rrff: Regex and force and thaw
3329
3330 in all cases provided there are no further characters in this
3331 argument. */
3332
3333 if (*argrest != 0)
3334 for (int i = 0; i < nelem(rsopts); i++)
3335 if (Ustrcmp(argrest, rsopts[i]) == 0)
3336 {
3337 if (i != 2) f.queue_run_force = TRUE;
3338 if (i >= 2) f.deliver_selectstring_regex = TRUE;
3339 if (i == 1 || i == 4) f.deliver_force_thaw = TRUE;
3340 argrest += Ustrlen(rsopts[i]);
3341 }
3342
3343 /* -R: Set string to match in addresses for forced queue run to
3344 pick out particular messages. */
3345
3346 if (*argrest)
3347 deliver_selectstring = argrest;
3348 else if (i+1 < argc)
3349 deliver_selectstring = argv[++i];
3350 else
3351 exim_fail("exim: string expected after -R\n");
3352 break;
3353
3354
3355 /* -r: an obsolete synonym for -f (see above) */
3356
3357
3358 /* -S: Like -R but works on sender. */
3359
3360 case 'S': /* Synonymous with -qS... */
3361 receiving_message = FALSE;
3362
3363 /* -Sf: As -S (below) but force all deliveries,
3364 -Sff: Ditto, but also thaw all frozen messages,
3365 -Sr: String is regex
3366 -Srf: Regex and force
3367 -Srff: Regex and force and thaw
3368
3369 in all cases provided there are no further characters in this
3370 argument. */
3371
3372 if (*argrest)
3373 for (int i = 0; i < nelem(rsopts); i++)
3374 if (Ustrcmp(argrest, rsopts[i]) == 0)
3375 {
3376 if (i != 2) f.queue_run_force = TRUE;
3377 if (i >= 2) f.deliver_selectstring_sender_regex = TRUE;
3378 if (i == 1 || i == 4) f.deliver_force_thaw = TRUE;
3379 argrest += Ustrlen(rsopts[i]);
3380 }
3381
3382 /* -S: Set string to match in addresses for forced queue run to
3383 pick out particular messages. */
3384
3385 if (*argrest)
3386 deliver_selectstring_sender = argrest;
3387 else if (i+1 < argc)
3388 deliver_selectstring_sender = argv[++i];
3389 else
3390 exim_fail("exim: string expected after -S\n");
3391 break;
3392
3393 /* -Tqt is an option that is exclusively for use by the testing suite.
3394 It is not recognized in other circumstances. It allows for the setting up
3395 of explicit "queue times" so that various warning/retry things can be
3396 tested. Otherwise variability of clock ticks etc. cause problems. */
3397
3398 case 'T':
3399 if (f.running_in_test_harness && Ustrcmp(argrest, "qt") == 0)
3400 fudged_queue_times = argv[++i];
3401 else badarg = TRUE;
3402 break;
3403
3404
3405 /* -t: Set flag to extract recipients from body of message. */
3406
3407 case 't':
3408 if (*argrest == 0) extract_recipients = TRUE;
3409
3410 /* -ti: Set flag to extract recipients from body of message, and also
3411 specify that dot does not end the message. */
3412
3413 else if (Ustrcmp(argrest, "i") == 0)
3414 {
3415 extract_recipients = TRUE;
3416 f.dot_ends = FALSE;
3417 }
3418
3419 /* -tls-on-connect: don't wait for STARTTLS (for old clients) */
3420
3421 #ifndef DISABLE_TLS
3422 else if (Ustrcmp(argrest, "ls-on-connect") == 0) tls_in.on_connect = TRUE;
3423 #endif
3424
3425 else badarg = TRUE;
3426 break;
3427
3428
3429 /* -U: This means "initial user submission" in sendmail, apparently. The
3430 doc claims that in future sendmail may refuse syntactically invalid
3431 messages instead of fixing them. For the moment, we just ignore it. */
3432
3433 case 'U':
3434 break;
3435
3436
3437 /* -v: verify things - this is a very low-level debugging */
3438
3439 case 'v':
3440 if (*argrest == 0)
3441 {
3442 debug_selector |= D_v;
3443 debug_file = stderr;
3444 }
3445 else badarg = TRUE;
3446 break;
3447
3448
3449 /* -x: AIX uses this to indicate some fancy 8-bit character stuff:
3450
3451 The -x flag tells the sendmail command that mail from a local
3452 mail program has National Language Support (NLS) extended characters
3453 in the body of the mail item. The sendmail command can send mail with
3454 extended NLS characters across networks that normally corrupts these
3455 8-bit characters.
3456
3457 As Exim is 8-bit clean, it just ignores this flag. */
3458
3459 case 'x':
3460 if (*argrest != 0) badarg = TRUE;
3461 break;
3462
3463 /* -X: in sendmail: takes one parameter, logfile, and sends debugging
3464 logs to that file. We swallow the parameter and otherwise ignore it. */
3465
3466 case 'X':
3467 if (*argrest == '\0')
3468 if (++i >= argc)
3469 exim_fail("exim: string expected after -X\n");
3470 break;
3471
3472 case 'z':
3473 if (*argrest == '\0')
3474 if (++i < argc)
3475 log_oneline = argv[i];
3476 else
3477 exim_fail("exim: file name expected after %s\n", argv[i-1]);
3478 break;
3479
3480 /* All other initial characters are errors */
3481
3482 default:
3483 badarg = TRUE;
3484 break;
3485 } /* End of high-level switch statement */
3486
3487 /* Failed to recognize the option, or syntax error */
3488
3489 if (badarg)
3490 exim_fail("exim abandoned: unknown, malformed, or incomplete "
3491 "option %s\n", arg);
3492 }
3493
3494
3495 /* If -R or -S have been specified without -q, assume a single queue run. */
3496
3497 if ( (deliver_selectstring || deliver_selectstring_sender)
3498 && queue_interval < 0)
3499 queue_interval = 0;
3500
3501
3502 END_ARG:
3503 /* If usage_wanted is set we call the usage function - which never returns */
3504 if (usage_wanted) exim_usage(called_as);
3505
3506 /* Arguments have been processed. Check for incompatibilities. */
3507 if ((
3508 (smtp_input || extract_recipients || recipients_arg < argc) &&
3509 (f.daemon_listen || queue_interval >= 0 || bi_option ||
3510 test_retry_arg >= 0 || test_rewrite_arg >= 0 ||
3511 filter_test != FTEST_NONE || (msg_action_arg > 0 && !one_msg_action))
3512 ) ||
3513 (
3514 msg_action_arg > 0 &&
3515 (f.daemon_listen || queue_interval > 0 || list_options ||
3516 (checking && msg_action != MSG_LOAD) ||
3517 bi_option || test_retry_arg >= 0 || test_rewrite_arg >= 0)
3518 ) ||
3519 (
3520 (f.daemon_listen || queue_interval > 0) &&
3521 (sender_address != NULL || list_options || list_queue || checking ||
3522 bi_option)
3523 ) ||
3524 (
3525 f.daemon_listen && queue_interval == 0
3526 ) ||
3527 (
3528 f.inetd_wait_mode && queue_interval >= 0
3529 ) ||
3530 (
3531 list_options &&
3532 (checking || smtp_input || extract_recipients ||
3533 filter_test != FTEST_NONE || bi_option)
3534 ) ||
3535 (
3536 verify_address_mode &&
3537 (f.address_test_mode || smtp_input || extract_recipients ||
3538 filter_test != FTEST_NONE || bi_option)
3539 ) ||
3540 (
3541 f.address_test_mode && (smtp_input || extract_recipients ||
3542 filter_test != FTEST_NONE || bi_option)
3543 ) ||
3544 (
3545 smtp_input && (sender_address != NULL || filter_test != FTEST_NONE ||
3546 extract_recipients)
3547 ) ||
3548 (
3549 deliver_selectstring != NULL && queue_interval < 0
3550 ) ||
3551 (
3552 msg_action == MSG_LOAD &&
3553 (!expansion_test || expansion_test_message != NULL)
3554 )
3555 )
3556 exim_fail("exim: incompatible command-line options or arguments\n");
3557
3558 /* If debugging is set up, set the file and the file descriptor to pass on to
3559 child processes. It should, of course, be 2 for stderr. Also, force the daemon
3560 to run in the foreground. */
3561
3562 if (debug_selector != 0)
3563 {
3564 debug_file = stderr;
3565 debug_fd = fileno(debug_file);
3566 f.background_daemon = FALSE;
3567 testharness_pause_ms(100); /* lets caller finish */
3568 if (debug_selector != D_v) /* -v only doesn't show this */
3569 {
3570 debug_printf("Exim version %s uid=%ld gid=%ld pid=%d D=%x\n",
3571 version_string, (long int)real_uid, (long int)real_gid, (int)getpid(),
3572 debug_selector);
3573 if (!version_printed)
3574 show_whats_supported(stderr);
3575 }
3576 }
3577
3578 /* When started with root privilege, ensure that the limits on the number of
3579 open files and the number of processes (where that is accessible) are
3580 sufficiently large, or are unset, in case Exim has been called from an
3581 environment where the limits are screwed down. Not all OS have the ability to
3582 change some of these limits. */
3583
3584 if (unprivileged)
3585 {
3586 DEBUG(D_any) debug_print_ids(US"Exim has no root privilege:");
3587 }
3588 else
3589 {
3590 struct rlimit rlp;
3591
3592 #ifdef RLIMIT_NOFILE
3593 if (getrlimit(RLIMIT_NOFILE, &rlp) < 0)
3594 {
3595 log_write(0, LOG_MAIN|LOG_PANIC, "getrlimit(RLIMIT_NOFILE) failed: %s",
3596 strerror(errno));
3597 rlp.rlim_cur = rlp.rlim_max = 0;
3598 }
3599
3600 /* I originally chose 1000 as a nice big number that was unlikely to
3601 be exceeded. It turns out that some older OS have a fixed upper limit of
3602 256. */
3603
3604 if (rlp.rlim_cur < 1000)
3605 {
3606 rlp.rlim_cur = rlp.rlim_max = 1000;
3607 if (setrlimit(RLIMIT_NOFILE, &rlp) < 0)
3608 {
3609 rlp.rlim_cur = rlp.rlim_max = 256;
3610 if (setrlimit(RLIMIT_NOFILE, &rlp) < 0)
3611 log_write(0, LOG_MAIN|LOG_PANIC, "setrlimit(RLIMIT_NOFILE) failed: %s",
3612 strerror(errno));
3613 }
3614 }
3615 #endif
3616
3617 #ifdef RLIMIT_NPROC
3618 if (getrlimit(RLIMIT_NPROC, &rlp) < 0)
3619 {
3620 log_write(0, LOG_MAIN|LOG_PANIC, "getrlimit(RLIMIT_NPROC) failed: %s",
3621 strerror(errno));
3622 rlp.rlim_cur = rlp.rlim_max = 0;
3623 }
3624
3625 #ifdef RLIM_INFINITY
3626 if (rlp.rlim_cur != RLIM_INFINITY && rlp.rlim_cur < 1000)
3627 {
3628 rlp.rlim_cur = rlp.rlim_max = RLIM_INFINITY;
3629 #else
3630 if (rlp.rlim_cur < 1000)
3631 {
3632 rlp.rlim_cur = rlp.rlim_max = 1000;
3633 #endif
3634 if (setrlimit(RLIMIT_NPROC, &rlp) < 0)
3635 log_write(0, LOG_MAIN|LOG_PANIC, "setrlimit(RLIMIT_NPROC) failed: %s",
3636 strerror(errno));
3637 }
3638 #endif
3639 }
3640
3641 /* Exim is normally entered as root (but some special configurations are
3642 possible that don't do this). However, it always spins off sub-processes that
3643 set their uid and gid as required for local delivery. We don't want to pass on
3644 any extra groups that root may belong to, so we want to get rid of them all at
3645 this point.
3646
3647 We need to obey setgroups() at this stage, before possibly giving up root
3648 privilege for a changed configuration file, but later on we might need to
3649 check on the additional groups for the admin user privilege - can't do that
3650 till after reading the config, which might specify the exim gid. Therefore,
3651 save the group list here first. */
3652
3653 if ((group_count = getgroups(nelem(group_list), group_list)) < 0)
3654 exim_fail("exim: getgroups() failed: %s\n", strerror(errno));
3655
3656 /* There is a fundamental difference in some BSD systems in the matter of
3657 groups. FreeBSD and BSDI are known to be different; NetBSD and OpenBSD are
3658 known not to be different. On the "different" systems there is a single group
3659 list, and the first entry in it is the current group. On all other versions of
3660 Unix there is a supplementary group list, which is in *addition* to the current
3661 group. Consequently, to get rid of all extraneous groups on a "standard" system
3662 you pass over 0 groups to setgroups(), while on a "different" system you pass
3663 over a single group - the current group, which is always the first group in the
3664 list. Calling setgroups() with zero groups on a "different" system results in
3665 an error return. The following code should cope with both types of system.
3666
3667 Unfortunately, recent MacOS, which should be a FreeBSD, "helpfully" succeeds
3668 the "setgroups() with zero groups" - and changes the egid.
3669 Thanks to that we had to stash the original_egid above, for use below
3670 in the call to exim_setugid().
3671
3672 However, if this process isn't running as root, setgroups() can't be used
3673 since you have to be root to run it, even if throwing away groups.
3674 Except, sigh, for Hurd - where you can.
3675 Not being root here happens only in some unusual configurations. */
3676
3677 if ( !unprivileged
3678 #ifndef OS_SETGROUPS_ZERO_DROPS_ALL
3679 && setgroups(0, NULL) != 0
3680 #endif
3681 && setgroups(1, group_list) != 0)
3682 exim_fail("exim: setgroups() failed: %s\n", strerror(errno));
3683
3684 /* If the configuration file name has been altered by an argument on the
3685 command line (either a new file name or a macro definition) and the caller is
3686 not root, or if this is a filter testing run, remove any setuid privilege the
3687 program has and run as the underlying user.
3688
3689 The exim user is locked out of this, which severely restricts the use of -C
3690 for some purposes.
3691
3692 Otherwise, set the real ids to the effective values (should be root unless run
3693 from inetd, which it can either be root or the exim uid, if one is configured).
3694
3695 There is a private mechanism for bypassing some of this, in order to make it
3696 possible to test lots of configurations automatically, without having either to
3697 recompile each time, or to patch in an actual configuration file name and other
3698 values (such as the path name). If running in the test harness, pretend that
3699 configuration file changes and macro definitions haven't happened. */
3700
3701 if (( /* EITHER */
3702 (!f.trusted_config || /* Config changed, or */
3703 !macros_trusted(opt_D_used)) && /* impermissible macros and */
3704 real_uid != root_uid && /* Not root, and */
3705 !f.running_in_test_harness /* Not fudged */
3706 ) || /* OR */
3707 expansion_test /* expansion testing */
3708 || /* OR */
3709 filter_test != FTEST_NONE) /* Filter testing */
3710 {
3711 setgroups(group_count, group_list);
3712 exim_setugid(real_uid, real_gid, FALSE,
3713 US"-C, -D, -be or -bf forces real uid");
3714 removed_privilege = TRUE;
3715
3716 /* In the normal case when Exim is called like this, stderr is available
3717 and should be used for any logging information because attempts to write
3718 to the log will usually fail. To arrange this, we unset really_exim. However,
3719 if no stderr is available there is no point - we might as well have a go
3720 at the log (if it fails, syslog will be written).
3721
3722 Note that if the invoker is Exim, the logs remain available. Messing with
3723 this causes unlogged successful deliveries. */
3724
3725 if (log_stderr && real_uid != exim_uid)
3726 f.really_exim = FALSE;
3727 }
3728
3729 /* Privilege is to be retained for the moment. It may be dropped later,
3730 depending on the job that this Exim process has been asked to do. For now, set
3731 the real uid to the effective so that subsequent re-execs of Exim are done by a
3732 privileged user. */
3733
3734 else
3735 exim_setugid(geteuid(), original_egid, FALSE, US"forcing real = effective");
3736
3737 /* If testing a filter, open the file(s) now, before wasting time doing other
3738 setups and reading the message. */
3739
3740 if (filter_test & FTEST_SYSTEM)
3741 if ((filter_sfd = Uopen(filter_test_sfile, O_RDONLY, 0)) < 0)
3742 exim_fail("exim: failed to open %s: %s\n", filter_test_sfile,
3743 strerror(errno));
3744
3745 if (filter_test & FTEST_USER)
3746 if ((filter_ufd = Uopen(filter_test_ufile, O_RDONLY, 0)) < 0)
3747 exim_fail("exim: failed to open %s: %s\n", filter_test_ufile,
3748 strerror(errno));
3749
3750 /* Initialise lookup_list
3751 If debugging, already called above via version reporting.
3752 In either case, we initialise the list of available lookups while running
3753 as root. All dynamically modules are loaded from a directory which is
3754 hard-coded into the binary and is code which, if not a module, would be
3755 part of Exim already. Ability to modify the content of the directory
3756 is equivalent to the ability to modify a setuid binary!
3757
3758 This needs to happen before we read the main configuration. */
3759 init_lookup_list();
3760
3761 #ifdef SUPPORT_I18N
3762 if (f.running_in_test_harness) smtputf8_advertise_hosts = NULL;
3763 #endif
3764
3765 /* Read the main runtime configuration data; this gives up if there
3766 is a failure. It leaves the configuration file open so that the subsequent
3767 configuration data for delivery can be read if needed.
3768
3769 NOTE: immediately after opening the configuration file we change the working
3770 directory to "/"! Later we change to $spool_directory. We do it there, because
3771 during readconf_main() some expansion takes place already. */
3772
3773 /* Store the initial cwd before we change directories. Can be NULL if the
3774 dir has already been unlinked. */
3775 initial_cwd = os_getcwd(NULL, 0);
3776
3777 /* checking:
3778 -be[m] expansion test -
3779 -b[fF] filter test new
3780 -bh[c] host test -
3781 -bmalware malware_test_file new
3782 -brt retry test new
3783 -brw rewrite test new
3784 -bt address test -
3785 -bv[s] address verify -
3786 list_options:
3787 -bP <option> (except -bP config, which sets list_config)
3788
3789 If any of these options is set, we suppress warnings about configuration
3790 issues (currently about tls_advertise_hosts and keep_environment not being
3791 defined) */
3792
3793 {
3794 #ifdef MEASURE_TIMING
3795 struct timeval t0, diff;
3796 (void)gettimeofday(&t0, NULL);
3797 #endif
3798
3799 readconf_main(checking || list_options);
3800
3801 #ifdef MEASURE_TIMING
3802 report_time_since(&t0, US"readconf_main (delta)");
3803 #endif
3804 }
3805
3806
3807 /* Now in directory "/" */
3808
3809 if (cleanup_environment() == FALSE)
3810 log_write(0, LOG_PANIC_DIE, "Can't cleanup environment");
3811
3812
3813 /* If an action on specific messages is requested, or if a daemon or queue
3814 runner is being started, we need to know if Exim was called by an admin user.
3815 This is the case if the real user is root or exim, or if the real group is
3816 exim, or if one of the supplementary groups is exim or a group listed in
3817 admin_groups. We don't fail all message actions immediately if not admin_user,
3818 since some actions can be performed by non-admin users. Instead, set admin_user
3819 for later interrogation. */
3820
3821 if (real_uid == root_uid || real_uid == exim_uid || real_gid == exim_gid)
3822 f.admin_user = TRUE;
3823 else
3824 for (int i = 0; i < group_count && !f.admin_user; i++)
3825 if (group_list[i] == exim_gid)
3826 f.admin_user = TRUE;
3827 else if (admin_groups)
3828 for (int j = 1; j <= (int)admin_groups[0] && !f.admin_user; j++)
3829 if (admin_groups[j] == group_list[i])
3830 f.admin_user = TRUE;
3831
3832 /* Another group of privileged users are the trusted users. These are root,
3833 exim, and any caller matching trusted_users or trusted_groups. Trusted callers
3834 are permitted to specify sender_addresses with -f on the command line, and
3835 other message parameters as well. */
3836
3837 if (real_uid == root_uid || real_uid == exim_uid)
3838 f.trusted_caller = TRUE;
3839 else
3840 {
3841 if (trusted_users)
3842 for (int i = 1; i <= (int)trusted_users[0] && !f.trusted_caller; i++)
3843 if (trusted_users[i] == real_uid)
3844 f.trusted_caller = TRUE;
3845
3846 if (trusted_groups)
3847 for (int i = 1; i <= (int)trusted_groups[0] && !f.trusted_caller; i++)
3848 if (trusted_groups[i] == real_gid)
3849 f.trusted_caller = TRUE;
3850 else for (int j = 0; j < group_count && !f.trusted_caller; j++)
3851 if (trusted_groups[i] == group_list[j])
3852 f.trusted_caller = TRUE;
3853 }
3854
3855 /* At this point, we know if the user is privileged and some command-line
3856 options become possibly impermissible, depending upon the configuration file. */
3857
3858 if (checking && commandline_checks_require_admin && !f.admin_user)
3859 exim_fail("exim: those command-line flags are set to require admin\n");
3860
3861 /* Handle the decoding of logging options. */
3862
3863 decode_bits(log_selector, log_selector_size, log_notall,
3864 log_selector_string, log_options, log_options_count, US"log", 0);
3865
3866 DEBUG(D_any)
3867 {
3868 debug_printf("configuration file is %s\n", config_main_filename);
3869 debug_printf("log selectors =");
3870 for (int i = 0; i < log_selector_size; i++)
3871 debug_printf(" %08x", log_selector[i]);
3872 debug_printf("\n");
3873 }
3874
3875 /* If domain literals are not allowed, check the sender address that was
3876 supplied with -f. Ditto for a stripped trailing dot. */
3877
3878 if (sender_address)
3879 {
3880 if (sender_address[sender_address_domain] == '[' && !allow_domain_literals)
3881 exim_fail("exim: bad -f address \"%s\": domain literals not "
3882 "allowed\n", sender_address);
3883 if (f_end_dot && !strip_trailing_dot)
3884 exim_fail("exim: bad -f address \"%s.\": domain is malformed "
3885 "(trailing dot not allowed)\n", sender_address);
3886 }
3887
3888 /* See if an admin user overrode our logging. */
3889
3890 if (cmdline_syslog_name)
3891 if (f.admin_user)
3892 {
3893 syslog_processname = cmdline_syslog_name;
3894 log_file_path = string_copy(CUS"syslog");
3895 }
3896 else
3897 /* not a panic, non-privileged users should not be able to spam paniclog */
3898 exim_fail(
3899 "exim: you lack sufficient privilege to specify syslog process name\n");
3900
3901 /* Paranoia check of maximum lengths of certain strings. There is a check
3902 on the length of the log file path in log.c, which will come into effect
3903 if there are any calls to write the log earlier than this. However, if we
3904 get this far but the string is very long, it is better to stop now than to
3905 carry on and (e.g.) receive a message and then have to collapse. The call to
3906 log_write() from here will cause the ultimate panic collapse if the complete
3907 file name exceeds the buffer length. */
3908
3909 if (Ustrlen(log_file_path) > 200)
3910 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3911 "log_file_path is longer than 200 chars: aborting");
3912
3913 if (Ustrlen(pid_file_path) > 200)
3914 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3915 "pid_file_path is longer than 200 chars: aborting");
3916
3917 if (Ustrlen(spool_directory) > 200)
3918 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3919 "spool_directory is longer than 200 chars: aborting");
3920
3921 /* Length check on the process name given to syslog for its TAG field,
3922 which is only permitted to be 32 characters or less. See RFC 3164. */
3923
3924 if (Ustrlen(syslog_processname) > 32)
3925 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3926 "syslog_processname is longer than 32 chars: aborting");
3927
3928 if (log_oneline)
3929 if (f.admin_user)
3930 {
3931 log_write(0, LOG_MAIN, "%s", log_oneline);
3932 return EXIT_SUCCESS;
3933 }
3934 else
3935 return EXIT_FAILURE;
3936
3937 /* In some operating systems, the environment variable TMPDIR controls where
3938 temporary files are created; Exim doesn't use these (apart from when delivering
3939 to MBX mailboxes), but called libraries such as DBM libraries may require them.
3940 If TMPDIR is found in the environment, reset it to the value defined in the
3941 EXIM_TMPDIR macro, if this macro is defined. For backward compatibility this
3942 macro may be called TMPDIR in old "Local/Makefile"s. It's converted to
3943 EXIM_TMPDIR by the build scripts.
3944 */
3945
3946 #ifdef EXIM_TMPDIR
3947 if (environ) for (uschar ** p = USS environ; *p; p++)
3948 if (Ustrncmp(*p, "TMPDIR=", 7) == 0 && Ustrcmp(*p+7, EXIM_TMPDIR) != 0)
3949 {
3950 uschar * newp = store_malloc(Ustrlen(EXIM_TMPDIR) + 8);
3951 sprintf(CS newp, "TMPDIR=%s", EXIM_TMPDIR);
3952 *p = newp;
3953 DEBUG(D_any) debug_printf("reset TMPDIR=%s in environment\n", EXIM_TMPDIR);
3954 }
3955 #endif
3956
3957 /* Timezone handling. If timezone_string is "utc", set a flag to cause all
3958 timestamps to be in UTC (gmtime() is used instead of localtime()). Otherwise,
3959 we may need to get rid of a bogus timezone setting. This can arise when Exim is
3960 called by a user who has set the TZ variable. This then affects the timestamps
3961 in log files and in Received: headers, and any created Date: header lines. The
3962 required timezone is settable in the configuration file, so nothing can be done
3963 about this earlier - but hopefully nothing will normally be logged earlier than
3964 this. We have to make a new environment if TZ is wrong, but don't bother if
3965 timestamps_utc is set, because then all times are in UTC anyway. */
3966
3967 if (timezone_string && strcmpic(timezone_string, US"UTC") == 0)
3968 f.timestamps_utc = TRUE;
3969 else
3970 {
3971 uschar *envtz = US getenv("TZ");
3972 if (envtz
3973 ? !timezone_string || Ustrcmp(timezone_string, envtz) != 0
3974 : timezone_string != NULL
3975 )
3976 {
3977 uschar **p = USS environ;
3978 uschar **new;
3979 uschar **newp;
3980 int count = 0;
3981 if (environ) while (*p++) count++;
3982 if (!envtz) count++;
3983 newp = new = store_malloc(sizeof(uschar *) * (count + 1));
3984 if (environ) for (p = USS environ; *p; p++)
3985 if (Ustrncmp(*p, "TZ=", 3) != 0) *newp++ = *p;
3986 if (timezone_string)
3987 {
3988 *newp = store_malloc(Ustrlen(timezone_string) + 4);
3989 sprintf(CS *newp++, "TZ=%s", timezone_string);
3990 }
3991 *newp = NULL;
3992 environ = CSS new;
3993 tzset();
3994 DEBUG(D_any) debug_printf("Reset TZ to %s: time is %s\n", timezone_string,
3995 tod_stamp(tod_log));
3996 }
3997 }
3998
3999 /* Handle the case when we have removed the setuid privilege because of -C or
4000 -D. This means that the caller of Exim was not root.
4001
4002 There is a problem if we were running as the Exim user. The sysadmin may
4003 expect this case to retain privilege because "the binary was called by the
4004 Exim user", but it hasn't, because either the -D option set macros, or the
4005 -C option set a non-trusted configuration file. There are two possibilities:
4006
4007 (1) If deliver_drop_privilege is set, Exim is not going to re-exec in order
4008 to do message deliveries. Thus, the fact that it is running as a
4009 non-privileged user is plausible, and might be wanted in some special
4010 configurations. However, really_exim will have been set false when
4011 privilege was dropped, to stop Exim trying to write to its normal log
4012 files. Therefore, re-enable normal log processing, assuming the sysadmin
4013 has set up the log directory correctly.
4014
4015 (2) If deliver_drop_privilege is not set, the configuration won't work as
4016 apparently intended, and so we log a panic message. In order to retain
4017 root for -C or -D, the caller must either be root or be invoking a
4018 trusted configuration file (when deliver_drop_privilege is false). */
4019
4020 if ( removed_privilege
4021 && (!f.trusted_config || opt_D_used)
4022 && real_uid == exim_uid)
4023 if (deliver_drop_privilege)
4024 f.really_exim = TRUE; /* let logging work normally */
4025 else
4026 log_write(0, LOG_MAIN|LOG_PANIC,
4027 "exim user lost privilege for using %s option",
4028 f.trusted_config? "-D" : "-C");
4029
4030 /* Start up Perl interpreter if Perl support is configured and there is a
4031 perl_startup option, and the configuration or the command line specifies
4032 initializing starting. Note that the global variables are actually called
4033 opt_perl_xxx to avoid clashing with perl's namespace (perl_*). */
4034
4035 #ifdef EXIM_PERL
4036 if (perl_start_option != 0)
4037 opt_perl_at_start = (perl_start_option > 0);
4038 if (opt_perl_at_start && opt_perl_startup != NULL)
4039 {
4040 uschar *errstr;
4041 DEBUG(D_any) debug_printf("Starting Perl interpreter\n");
4042 if ((errstr = init_perl(opt_perl_startup)))
4043 exim_fail("exim: error in perl_startup code: %s\n", errstr);
4044 opt_perl_started = TRUE;
4045 }
4046 #endif /* EXIM_PERL */
4047
4048 /* Log the arguments of the call if the configuration file said so. This is
4049 a debugging feature for finding out what arguments certain MUAs actually use.
4050 Don't attempt it if logging is disabled, or if listing variables or if
4051 verifying/testing addresses or expansions. */
4052
4053 if ( (debug_selector & D_any || LOGGING(arguments))
4054 && f.really_exim && !list_options && !checking)
4055 {
4056 uschar *p = big_buffer;
4057 Ustrcpy(p, US"cwd= (failed)");
4058
4059 if (!initial_cwd)
4060 p += 13;
4061 else
4062 {
4063 Ustrncpy(p + 4, initial_cwd, big_buffer_size-5);
4064 p += 4 + Ustrlen(initial_cwd);
4065 /* in case p is near the end and we don't provide enough space for
4066 * string_format to be willing to write. */
4067 *p = '\0';
4068 }
4069
4070 (void)string_format(p, big_buffer_size - (p - big_buffer), " %d args:", argc);
4071 while (*p) p++;
4072 for (int i = 0; i < argc; i++)
4073 {
4074 int len = Ustrlen(argv[i]);
4075 const uschar *printing;
4076 uschar *quote;
4077 if (p + len + 8 >= big_buffer + big_buffer_size)
4078 {
4079 Ustrcpy(p, US" ...");
4080 log_write(0, LOG_MAIN, "%s", big_buffer);
4081 Ustrcpy(big_buffer, US"...");
4082 p = big_buffer + 3;
4083 }
4084 printing = string_printing(argv[i]);
4085 if (printing[0] == 0) quote = US"\""; else
4086 {
4087 const uschar *pp = printing;
4088 quote = US"";
4089 while (*pp != 0) if (isspace(*pp++)) { quote = US"\""; break; }
4090 }
4091 p += sprintf(CS p, " %s%.*s%s", quote, (int)(big_buffer_size -
4092 (p - big_buffer) - 4), printing, quote);
4093 }
4094
4095 if (LOGGING(arguments))