1 /*************************************************
2 * Exim - an Internet mail transport agent *
3 *************************************************/
4
5 /* Copyright (c) University of Cambridge 1995 - 2018 */
6 /* Copyright (c) The Exim Maintainers 2020 */
7 /* See the file NOTICE for conditions of use and distribution. */
8
9
10 /* The main function: entry point, initialization, and high-level control.
11 Also a few functions that don't naturally fit elsewhere. */
12
13
14 #include "exim.h"
15
16 #if defined(__GLIBC__) && !defined(__UCLIBC__)
17 # include <gnu/libc-version.h>
18 #endif
19
20 #ifdef USE_GNUTLS
21 # include <gnutls/gnutls.h>
22 # if GNUTLS_VERSION_NUMBER < 0x030103 && !defined(DISABLE_OCSP)
23 # define DISABLE_OCSP
24 # endif
25 #endif
26
27 #ifndef _TIME_H
28 # include <time.h>
29 #endif
30
31 extern void init_lookup_list(void);
32
33
34
35 /*************************************************
36 * Function interface to store functions *
37 *************************************************/
38
39 /* We need some real functions to pass to the PCRE regular expression library
40 for store allocation via Exim's store manager. The normal calls are actually
41 macros that pass over location information to make tracing easier. These
42 functions just interface to the standard macro calls. A good compiler will
43 optimize out the tail recursion and so not make them too expensive. There
44 are two sets of functions; one for use when we want to retain the compiled
45 regular expression for a long time; the other for short-term use. */
46
47 static void *
function_store_get(size_t size)48 function_store_get(size_t size)
49 {
50 /* For now, regard all RE results as potentially tainted. We might need
51 more intelligence on this point. */
52 return store_get((int)size, TRUE);
53 }
54
55 static void
function_dummy_free(void * block)56 function_dummy_free(void * block) {}
57
58 static void *
function_store_malloc(size_t size)59 function_store_malloc(size_t size)
60 {
61 return store_malloc((int)size);
62 }
63
64 static void
function_store_free(void * block)65 function_store_free(void * block)
66 {
67 store_free(block);
68 }
69
70
71
72
73 /*************************************************
74 * Enums for cmdline interface *
75 *************************************************/
76
77 enum commandline_info { CMDINFO_NONE=0,
78 CMDINFO_HELP, CMDINFO_SIEVE, CMDINFO_DSCP };
79
80
81
82
83 /*************************************************
84 * Compile regular expression and panic on fail *
85 *************************************************/
86
87 /* This function is called when failure to compile a regular expression leads
88 to a panic exit. In other cases, pcre_compile() is called directly. In many
89 cases where this function is used, the results of the compilation are to be
90 placed in long-lived store, so we temporarily reset the store management
91 functions that PCRE uses if the use_malloc flag is set.
92
93 Argument:
94 pattern the pattern to compile
95 caseless TRUE if caseless matching is required
96 use_malloc TRUE if compile into malloc store
97
98 Returns: pointer to the compiled pattern
99 */
100
101 const pcre *
regex_must_compile(const uschar * pattern,BOOL caseless,BOOL use_malloc)102 regex_must_compile(const uschar *pattern, BOOL caseless, BOOL use_malloc)
103 {
104 int offset;
105 int options = PCRE_COPT;
106 const pcre *yield;
107 const uschar *error;
108 if (use_malloc)
109 {
110 pcre_malloc = function_store_malloc;
111 pcre_free = function_store_free;
112 }
113 if (caseless) options |= PCRE_CASELESS;
114 yield = pcre_compile(CCS pattern, options, CCSS &error, &offset, NULL);
115 pcre_malloc = function_store_get;
116 pcre_free = function_dummy_free;
117 if (yield == NULL)
118 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "regular expression error: "
119 "%s at offset %d while compiling %s", error, offset, pattern);
120 return yield;
121 }
122
123
124
125
126 /*************************************************
127 * Execute regular expression and set strings *
128 *************************************************/
129
130 /* This function runs a regular expression match, and sets up the pointers to
131 the matched substrings.
132
133 Arguments:
134 re the compiled expression
135 subject the subject string
136 options additional PCRE options
137 setup if < 0 do full setup
138 if >= 0 setup from setup+1 onwards,
139 excluding the full matched string
140
141 Returns: TRUE or FALSE
142 */
143
144 BOOL
regex_match_and_setup(const pcre * re,const uschar * subject,int options,int setup)145 regex_match_and_setup(const pcre *re, const uschar *subject, int options, int setup)
146 {
147 int ovector[3*(EXPAND_MAXN+1)];
148 uschar * s = string_copy(subject); /* de-constifying */
149 int n = pcre_exec(re, NULL, CS s, Ustrlen(s), 0,
150 PCRE_EOPT | options, ovector, nelem(ovector));
151 BOOL yield = n >= 0;
152 if (n == 0) n = EXPAND_MAXN + 1;
153 if (yield)
154 {
155 expand_nmax = setup < 0 ? 0 : setup + 1;
156 for (int nn = setup < 0 ? 0 : 2; nn < n*2; nn += 2)
157 {
158 expand_nstring[expand_nmax] = s + ovector[nn];
159 expand_nlength[expand_nmax++] = ovector[nn+1] - ovector[nn];
160 }
161 expand_nmax--;
162 }
163 return yield;
164 }
165
166
167
168
169 /*************************************************
170 * Set up processing details *
171 *************************************************/
172
173 /* Save a text string for dumping when SIGUSR1 is received.
174 Do checks for overruns.
175
176 Arguments: format and arguments, as for printf()
177 Returns: nothing
178 */
179
180 void
set_process_info(const char * format,...)181 set_process_info(const char *format, ...)
182 {
183 gstring gs = { .size = PROCESS_INFO_SIZE - 2, .ptr = 0, .s = process_info };
184 gstring * g;
185 int len;
186 va_list ap;
187
188 g = string_fmt_append(&gs, "%5d ", (int)getpid());
189 len = g->ptr;
190 va_start(ap, format);
191 if (!string_vformat(g, 0, format, ap))
192 {
193 gs.ptr = len;
194 g = string_cat(&gs, US"**** string overflowed buffer ****");
195 }
196 g = string_catn(g, US"\n", 1);
197 string_from_gstring(g);
198 process_info_len = g->ptr;
199 DEBUG(D_process_info) debug_printf("set_process_info: %s", process_info);
200 va_end(ap);
201 }
202
203 /***********************************************
204 * Handler for SIGTERM *
205 ***********************************************/
206
207 static void
term_handler(int sig)208 term_handler(int sig)
209 {
210 exit(1);
211 }
212
213
214 /***********************************************
215 * Handler for SIGSEGV *
216 ***********************************************/
217
218 static void
segv_handler(int sig)219 segv_handler(int sig)
220 {
221 log_write(0, LOG_MAIN|LOG_PANIC, "SIGSEGV (maybe attempt to write to immutable memory)");
222 signal(SIGSEGV, SIG_DFL);
223 kill(getpid(), sig);
224 }
225
226
227 /*************************************************
228 * Handler for SIGUSR1 *
229 *************************************************/
230
231 /* SIGUSR1 causes any exim process to write to the process log details of
232 what it is currently doing. It will only be used if the OS is capable of
233 setting up a handler that causes automatic restarting of any system call
234 that is in progress at the time.
235
236 This function takes care to be signal-safe.
237
238 Argument: the signal number (SIGUSR1)
239 Returns: nothing
240 */
241
242 static void
usr1_handler(int sig)243 usr1_handler(int sig)
244 {
245 int fd;
246
247 os_restarting_signal(sig, usr1_handler);
248
249 if (!process_log_path) return;
250 fd = log_open_as_exim(process_log_path);
251
252 /* If we are neither exim nor root, or if we failed to create the log file,
253 give up. There is not much useful we can do with errors, since we don't want
254 to disrupt whatever is going on outside the signal handler. */
255
256 if (fd < 0) return;
257
258 (void)write(fd, process_info, process_info_len);
259 (void)close(fd);
260 }
261
262
263
264 /*************************************************
265 * Timeout handler *
266 *************************************************/
267
268 /* This handler is enabled most of the time that Exim is running. The handler
269 doesn't actually get used unless alarm() has been called to set a timer, to
270 place a time limit on a system call of some kind. When the handler is run, it
271 re-enables itself.
272
273 There are some other SIGALRM handlers that are used in special cases when more
274 than just a flag setting is required; for example, when reading a message's
275 input. These are normally set up in the code module that uses them, and the
276 SIGALRM handler is reset to this one afterwards.
277
278 Argument: the signal value (SIGALRM)
279 Returns: nothing
280 */
281
282 void
sigalrm_handler(int sig)283 sigalrm_handler(int sig)
284 {
285 sigalrm_seen = TRUE;
286 os_non_restarting_signal(SIGALRM, sigalrm_handler);
287 }
288
289
290
291 /*************************************************
292 * Sleep for a fractional time interval *
293 *************************************************/
294
295 /* This function is called by millisleep() and exim_wait_tick() to wait for a
296 period of time that may include a fraction of a second. The coding is somewhat
297 tedious. We do not expect setitimer() ever to fail, but if it does, the process
298 will wait for ever, so we panic in this instance. (There was a case of this
299 when a bug in a function that calls milliwait() caused it to pass invalid data.
300 That's when I added the check. :-)
301
302 We assume it to be not worth sleeping for under 50us; this value will
303 require revisiting as hardware advances. This avoids the issue of
304 a zero-valued timer setting meaning "never fire".
305
306 Argument: an itimerval structure containing the interval
307 Returns: nothing
308 */
309
310 static void
milliwait(struct itimerval * itval)311 milliwait(struct itimerval *itval)
312 {
313 sigset_t sigmask;
314 sigset_t old_sigmask;
315 int save_errno = errno;
316
317 if (itval->it_value.tv_usec < 50 && itval->it_value.tv_sec == 0)
318 return;
319 (void)sigemptyset(&sigmask); /* Empty mask */
320 (void)sigaddset(&sigmask, SIGALRM); /* Add SIGALRM */
321 (void)sigprocmask(SIG_BLOCK, &sigmask, &old_sigmask); /* Block SIGALRM */
322 if (setitimer(ITIMER_REAL, itval, NULL) < 0) /* Start timer */
323 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
324 "setitimer() failed: %s", strerror(errno));
325 (void)sigfillset(&sigmask); /* All signals */
326 (void)sigdelset(&sigmask, SIGALRM); /* Remove SIGALRM */
327 (void)sigsuspend(&sigmask); /* Until SIGALRM */
328 (void)sigprocmask(SIG_SETMASK, &old_sigmask, NULL); /* Restore mask */
329 errno = save_errno;
330 sigalrm_seen = FALSE;
331 }
332
333
334
335
336 /*************************************************
337 * Millisecond sleep function *
338 *************************************************/
339
340 /* The basic sleep() function has a granularity of 1 second, which is too rough
341 in some cases - for example, when using an increasing delay to slow down
342 spammers.
343
344 Argument: number of millseconds
345 Returns: nothing
346 */
347
348 void
millisleep(int msec)349 millisleep(int msec)
350 {
351 struct itimerval itval = {.it_interval = {.tv_sec = 0, .tv_usec = 0},
352 .it_value = {.tv_sec = msec/1000,
353 .tv_usec = (msec % 1000) * 1000}};
354 milliwait(&itval);
355 }
356
357
358
359 /*************************************************
360 * Compare microsecond times *
361 *************************************************/
362
363 /*
364 Arguments:
365 tv1 the first time
366 tv2 the second time
367
368 Returns: -1, 0, or +1
369 */
370
371 static int
exim_tvcmp(struct timeval * t1,struct timeval * t2)372 exim_tvcmp(struct timeval *t1, struct timeval *t2)
373 {
374 if (t1->tv_sec > t2->tv_sec) return +1;
375 if (t1->tv_sec < t2->tv_sec) return -1;
376 if (t1->tv_usec > t2->tv_usec) return +1;
377 if (t1->tv_usec < t2->tv_usec) return -1;
378 return 0;
379 }
380
381
382
383
384 /*************************************************
385 * Clock tick wait function *
386 *************************************************/
387
388 #ifdef _POSIX_MONOTONIC_CLOCK
389 # ifdef CLOCK_BOOTTIME
390 # define EXIM_CLOCKTYPE CLOCK_BOOTTIME
391 # else
392 # define EXIM_CLOCKTYPE CLOCK_MONOTONIC
393 # endif
394
395 /* Amount EXIM_CLOCK is behind realtime, at startup. */
396 static struct timespec offset_ts;
397
398 static void
exim_clock_init(void)399 exim_clock_init(void)
400 {
401 struct timeval tv;
402 if (clock_gettime(EXIM_CLOCKTYPE, &offset_ts) != 0) return;
403 (void)gettimeofday(&tv, NULL);
404 offset_ts.tv_sec = tv.tv_sec - offset_ts.tv_sec;
405 offset_ts.tv_nsec = tv.tv_usec * 1000 - offset_ts.tv_nsec;
406 if (offset_ts.tv_nsec >= 0) return;
407 offset_ts.tv_sec--;
408 offset_ts.tv_nsec += 1000*1000*1000;
409 }
410 #endif
411
412
413 void
exim_gettime(struct timeval * tv)414 exim_gettime(struct timeval * tv)
415 {
416 #ifdef _POSIX_MONOTONIC_CLOCK
417 struct timespec now_ts;
418
419 if (clock_gettime(EXIM_CLOCKTYPE, &now_ts) == 0)
420 {
421 now_ts.tv_sec += offset_ts.tv_sec;
422 if ((now_ts.tv_nsec += offset_ts.tv_nsec) >= 1000*1000*1000)
423 {
424 now_ts.tv_sec++;
425 now_ts.tv_nsec -= 1000*1000*1000;
426 }
427 tv->tv_sec = now_ts.tv_sec;
428 tv->tv_usec = now_ts.tv_nsec / 1000;
429 }
430 else
431 #endif
432 (void)gettimeofday(tv, NULL);
433 }
434
435
436 /* Exim uses a time + a pid to generate a unique identifier in two places: its
437 message IDs, and in file names for maildir deliveries. Because some OS now
438 re-use pids within the same second, sub-second times are now being used.
439 However, for absolute certainty, we must ensure the clock has ticked before
440 allowing the relevant process to complete. At the time of implementation of
441 this code (February 2003), the speed of processors is such that the clock will
442 invariably have ticked already by the time a process has done its job. This
443 function prepares for the time when things are faster - and it also copes with
444 clocks that go backwards.
445
446 Arguments:
447 tgt_tv A timeval which was used to create uniqueness; its usec field
448 has been rounded down to the value of the resolution.
449 We want to be sure the current time is greater than this.
450 resolution The resolution that was used to divide the microseconds
451 (1 for maildir, larger for message ids)
452
453 Returns: nothing
454 */
455
456 void
exim_wait_tick(struct timeval * tgt_tv,int resolution)457 exim_wait_tick(struct timeval * tgt_tv, int resolution)
458 {
459 struct timeval now_tv;
460 long int now_true_usec;
461
462 exim_gettime(&now_tv);
463 now_true_usec = now_tv.tv_usec;
464 now_tv.tv_usec = (now_true_usec/resolution) * resolution;
465
466 while (exim_tvcmp(&now_tv, tgt_tv) <= 0)
467 {
468 struct itimerval itval;
469 itval.it_interval.tv_sec = 0;
470 itval.it_interval.tv_usec = 0;
471 itval.it_value.tv_sec = tgt_tv->tv_sec - now_tv.tv_sec;
472 itval.it_value.tv_usec = tgt_tv->tv_usec + resolution - now_true_usec;
473
474 /* We know that, overall, "now" is less than or equal to "then". Therefore, a
475 negative value for the microseconds is possible only in the case when "now"
476 is more than a second less than "tgt". That means that itval.it_value.tv_sec
477 is greater than zero. The following correction is therefore safe. */
478
479 if (itval.it_value.tv_usec < 0)
480 {
481 itval.it_value.tv_usec += 1000000;
482 itval.it_value.tv_sec -= 1;
483 }
484
485 DEBUG(D_transport|D_receive)
486 {
487 if (!f.running_in_test_harness)
488 {
489 debug_printf("tick check: " TIME_T_FMT ".%06lu " TIME_T_FMT ".%06lu\n",
490 tgt_tv->tv_sec, (long) tgt_tv->tv_usec,
491 now_tv.tv_sec, (long) now_tv.tv_usec);
492 debug_printf("waiting " TIME_T_FMT ".%06lu sec\n",
493 itval.it_value.tv_sec, (long) itval.it_value.tv_usec);
494 }
495 }
496
497 milliwait(&itval);
498
499 /* Be prapared to go around if the kernel does not implement subtick
500 granularity (GNU Hurd) */
501
502 exim_gettime(&now_tv);
503 now_true_usec = now_tv.tv_usec;
504 now_tv.tv_usec = (now_true_usec/resolution) * resolution;
505 }
506 }
507
508
509
510
511 /*************************************************
512 * Call fopen() with umask 777 and adjust mode *
513 *************************************************/
514
515 /* Exim runs with umask(0) so that files created with open() have the mode that
516 is specified in the open() call. However, there are some files, typically in
517 the spool directory, that are created with fopen(). They end up world-writeable
518 if no precautions are taken. Although the spool directory is not accessible to
519 the world, this is an untidiness. So this is a wrapper function for fopen()
520 that sorts out the mode of the created file.
521
522 Arguments:
523 filename the file name
524 options the fopen() options
525 mode the required mode
526
527 Returns: the fopened FILE or NULL
528 */
529
530 FILE *
modefopen(const uschar * filename,const char * options,mode_t mode)531 modefopen(const uschar *filename, const char *options, mode_t mode)
532 {
533 mode_t saved_umask = umask(0777);
534 FILE *f = Ufopen(filename, options);
535 (void)umask(saved_umask);
536 if (f != NULL) (void)fchmod(fileno(f), mode);
537 return f;
538 }
539
540
541 /*************************************************
542 * Ensure stdin, stdout, and stderr exist *
543 *************************************************/
544
545 /* Some operating systems grumble if an exec() happens without a standard
546 input, output, and error (fds 0, 1, 2) being defined. The worry is that some
547 file will be opened and will use these fd values, and then some other bit of
548 code will assume, for example, that it can write error messages to stderr.
549 This function ensures that fds 0, 1, and 2 are open if they do not already
550 exist, by connecting them to /dev/null.
551
552 This function is also used to ensure that std{in,out,err} exist at all times,
553 so that if any library that Exim calls tries to use them, it doesn't crash.
554
555 Arguments: None
556 Returns: Nothing
557 */
558
559 void
exim_nullstd(void)560 exim_nullstd(void)
561 {
562 int devnull = -1;
563 struct stat statbuf;
564 for (int i = 0; i <= 2; i++)
565 {
566 if (fstat(i, &statbuf) < 0 && errno == EBADF)
567 {
568 if (devnull < 0) devnull = open("/dev/null", O_RDWR);
569 if (devnull < 0) log_write(0, LOG_MAIN|LOG_PANIC_DIE, "%s",
570 string_open_failed("/dev/null", NULL));
571 if (devnull != i) (void)dup2(devnull, i);
572 }
573 }
574 if (devnull > 2) (void)close(devnull);
575 }
576
577
578
579
580 /*************************************************
581 * Close unwanted file descriptors for delivery *
582 *************************************************/
583
584 /* This function is called from a new process that has been forked to deliver
585 an incoming message, either directly, or using exec.
586
587 We want any smtp input streams to be closed in this new process. However, it
588 has been observed that using fclose() here causes trouble. When reading in -bS
589 input, duplicate copies of messages have been seen. The files will be sharing a
590 file pointer with the parent process, and it seems that fclose() (at least on
591 some systems - I saw this on Solaris 2.5.1) messes with that file pointer, at
592 least sometimes. Hence we go for closing the underlying file descriptors.
593
594 If TLS is active, we want to shut down the TLS library, but without molesting
595 the parent's SSL connection.
596
597 For delivery of a non-SMTP message, we want to close stdin and stdout (and
598 stderr unless debugging) because the calling process might have set them up as
599 pipes and be waiting for them to close before it waits for the submission
600 process to terminate. If they aren't closed, they hold up the calling process
601 until the initial delivery process finishes, which is not what we want.
602
603 Exception: We do want it for synchronous delivery!
604
605 And notwithstanding all the above, if D_resolver is set, implying resolver
606 debugging, leave stdout open, because that's where the resolver writes its
607 debugging output.
608
609 When we close stderr (which implies we've also closed stdout), we also get rid
610 of any controlling terminal.
611
612 Arguments: None
613 Returns: Nothing
614 */
615
616 static void
close_unwanted(void)617 close_unwanted(void)
618 {
619 if (smtp_input)
620 {
621 #ifndef DISABLE_TLS
622 tls_close(NULL, TLS_NO_SHUTDOWN); /* Shut down the TLS library */
623 #endif
624 (void)close(fileno(smtp_in));
625 (void)close(fileno(smtp_out));
626 smtp_in = NULL;
627 }
628 else
629 {
630 (void)close(0); /* stdin */
631 if ((debug_selector & D_resolver) == 0) (void)close(1); /* stdout */
632 if (debug_selector == 0) /* stderr */
633 {
634 if (!f.synchronous_delivery)
635 {
636 (void)close(2);
637 log_stderr = NULL;
638 }
639 (void)setsid();
640 }
641 }
642 }
643
644
645
646
647 /*************************************************
648 * Set uid and gid *
649 *************************************************/
650
651 /* This function sets a new uid and gid permanently, optionally calling
652 initgroups() to set auxiliary groups. There are some special cases when running
653 Exim in unprivileged modes. In these situations the effective uid will not be
654 root; if we already have the right effective uid/gid, and don't need to
655 initialize any groups, leave things as they are.
656
657 Arguments:
658 uid the uid
659 gid the gid
660 igflag TRUE if initgroups() wanted
661 msg text to use in debugging output and failure log
662
663 Returns: nothing; bombs out on failure
664 */
665
666 void
exim_setugid(uid_t uid,gid_t gid,BOOL igflag,uschar * msg)667 exim_setugid(uid_t uid, gid_t gid, BOOL igflag, uschar *msg)
668 {
669 uid_t euid = geteuid();
670 gid_t egid = getegid();
671
672 if (euid == root_uid || euid != uid || egid != gid || igflag)
673 {
674 /* At least one OS returns +1 for initgroups failure, so just check for
675 non-zero. */
676
677 if (igflag)
678 {
679 struct passwd *pw = getpwuid(uid);
680 if (!pw)
681 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "cannot run initgroups(): "
682 "no passwd entry for uid=%ld", (long int)uid);
683
684 if (initgroups(pw->pw_name, gid) != 0)
685 log_write(0,LOG_MAIN|LOG_PANIC_DIE,"initgroups failed for uid=%ld: %s",
686 (long int)uid, strerror(errno));
687 }
688
689 if (setgid(gid) < 0 || setuid(uid) < 0)
690 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "unable to set gid=%ld or uid=%ld "
691 "(euid=%ld): %s", (long int)gid, (long int)uid, (long int)euid, msg);
692 }
693
694 /* Debugging output included uid/gid and all groups */
695
696 DEBUG(D_uid)
697 {
698 int group_count, save_errno;
699 gid_t group_list[EXIM_GROUPLIST_SIZE];
700 debug_printf("changed uid/gid: %s\n uid=%ld gid=%ld pid=%ld\n", msg,
701 (long int)geteuid(), (long int)getegid(), (long int)getpid());
702 group_count = getgroups(nelem(group_list), group_list);
703 save_errno = errno;
704 debug_printf(" auxiliary group list:");
705 if (group_count > 0)
706 for (int i = 0; i < group_count; i++) debug_printf(" %d", (int)group_list[i]);
707 else if (group_count < 0)
708 debug_printf(" <error: %s>", strerror(save_errno));
709 else debug_printf(" <none>");
710 debug_printf("\n");
711 }
712 }
713
714
715
716
717 /*************************************************
718 * Exit point *
719 *************************************************/
720
721 /* Exim exits via this function so that it always clears up any open
722 databases.
723
724 Arguments:
725 rc return code
726
727 Returns: does not return
728 */
729
730 void
exim_exit(int rc)731 exim_exit(int rc)
732 {
733 search_tidyup();
734 store_exit();
735 DEBUG(D_any)
736 debug_printf(">>>>>>>>>>>>>>>> Exim pid=%d (%s) terminating with rc=%d "
737 ">>>>>>>>>>>>>>>>\n",
738 (int)getpid(), process_purpose, rc);
739 exit(rc);
740 }
741
742
743 void
exim_underbar_exit(int rc)744 exim_underbar_exit(int rc)
745 {
746 store_exit();
747 DEBUG(D_any)
748 debug_printf(">>>>>>>>>>>>>>>> Exim pid=%d (%s) terminating with rc=%d "
749 ">>>>>>>>>>>>>>>>\n",
750 (int)getpid(), process_purpose, rc);
751 _exit(rc);
752 }
753
754
755
756 /* Print error string, then die */
757 static void
exim_fail(const char * fmt,...)758 exim_fail(const char * fmt, ...)
759 {
760 va_list ap;
761 va_start(ap, fmt);
762 vfprintf(stderr, fmt, ap);
763 exit(EXIT_FAILURE);
764 }
765
766 /* fail if a length is too long */
767 static inline void
exim_len_fail_toolong(int itemlen,int maxlen,const char * description)768 exim_len_fail_toolong(int itemlen, int maxlen, const char *description)
769 {
770 if (itemlen <= maxlen)
771 return;
772 fprintf(stderr, "exim: length limit exceeded (%d > %d) for: %s\n",
773 itemlen, maxlen, description);
774 exit(EXIT_FAILURE);
775 }
776
777 /* only pass through the string item back to the caller if it's short enough */
778 static inline const uschar *
exim_str_fail_toolong(const uschar * item,int maxlen,const char * description)779 exim_str_fail_toolong(const uschar *item, int maxlen, const char *description)
780 {
781 exim_len_fail_toolong(Ustrlen(item), maxlen, description);
782 return item;
783 }
784
785 /* exim_chown_failure() called from exim_chown()/exim_fchown() on failure
786 of chown()/fchown(). See src/functions.h for more explanation */
787 int
exim_chown_failure(int fd,const uschar * name,uid_t owner,gid_t group)788 exim_chown_failure(int fd, const uschar *name, uid_t owner, gid_t group)
789 {
790 int saved_errno = errno; /* from the preceeding chown call */
791 #if 1
792 log_write(0, LOG_MAIN|LOG_PANIC,
793 __FILE__ ":%d: chown(%s, %d:%d) failed (%s)."
794 " Please contact the authors and refer to https://bugs.exim.org/show_bug.cgi?id=2391",
795 __LINE__, name?name:US"<unknown>", owner, group, strerror(errno));
796 #else
797 /* I leave this here, commented, in case the "bug"(?) comes up again.
798 It is not an Exim bug, but we can provide a workaround.
799 See Bug 2391
800 HS 2019-04-18 */
801
802 struct stat buf;
803
804 if (0 == (fd < 0 ? stat(name, &buf) : fstat(fd, &buf)))
805 {
806 if (buf.st_uid == owner && buf.st_gid == group) return 0;
807 log_write(0, LOG_MAIN|LOG_PANIC, "Wrong ownership on %s", name);
808 }
809 else log_write(0, LOG_MAIN|LOG_PANIC, "Stat failed on %s: %s", name, strerror(errno));
810
811 #endif
812 errno = saved_errno;
813 return -1;
814 }
815
816
817 /*************************************************
818 * Extract port from host address *
819 *************************************************/
820
821 /* Called to extract the port from the values given to -oMa and -oMi.
822 It also checks the syntax of the address, and terminates it before the
823 port data when a port is extracted.
824
825 Argument:
826 address the address, with possible port on the end
827
828 Returns: the port, or zero if there isn't one
829 bombs out on a syntax error
830 */
831
832 static int
check_port(uschar * address)833 check_port(uschar *address)
834 {
835 int port = host_address_extract_port(address);
836 if (string_is_ip_address(address, NULL) == 0)
837 exim_fail("exim abandoned: \"%s\" is not an IP address\n", address);
838 return port;
839 }
840
841
842
843 /*************************************************
844 * Test/verify an address *
845 *************************************************/
846
847 /* This function is called by the -bv and -bt code. It extracts a working
848 address from a full RFC 822 address. This isn't really necessary per se, but it
849 has the effect of collapsing source routes.
850
851 Arguments:
852 s the address string
853 flags flag bits for verify_address()
854 exit_value to be set for failures
855
856 Returns: nothing
857 */
858
859 static void
test_address(uschar * s,int flags,int * exit_value)860 test_address(uschar *s, int flags, int *exit_value)
861 {
862 int start, end, domain;
863 uschar *parse_error = NULL;
864 uschar *address = parse_extract_address(s, &parse_error, &start, &end, &domain,
865 FALSE);
866 if (!address)
867 {
868 fprintf(stdout, "syntax error: %s\n", parse_error);
869 *exit_value = 2;
870 }
871 else
872 {
873 int rc = verify_address(deliver_make_addr(address,TRUE), stdout, flags, -1,
874 -1, -1, NULL, NULL, NULL);
875 if (rc == FAIL) *exit_value = 2;
876 else if (rc == DEFER && *exit_value == 0) *exit_value = 1;
877 }
878 }
879
880
881
882 /*************************************************
883 * Show supported features *
884 *************************************************/
885
886 static void
show_db_version(FILE * f)887 show_db_version(FILE * f)
888 {
889 #ifdef DB_VERSION_STRING
890 DEBUG(D_any)
891 {
892 fprintf(f, "Library version: BDB: Compile: %s\n", DB_VERSION_STRING);
893 fprintf(f, " Runtime: %s\n",
894 db_version(NULL, NULL, NULL));
895 }
896 else
897 fprintf(f, "Berkeley DB: %s\n", DB_VERSION_STRING);
898
899 #elif defined(BTREEVERSION) && defined(HASHVERSION)
900 #ifdef USE_DB
901 fprintf(f, "Probably Berkeley DB version 1.8x (native mode)\n");
902 #else
903 fprintf(f, "Probably Berkeley DB version 1.8x (compatibility mode)\n");
904 #endif
905
906 #elif defined(_DBM_RDONLY) || defined(dbm_dirfno)
907 fprintf(f, "Probably ndbm\n");
908 #elif defined(USE_TDB)
909 fprintf(f, "Using tdb\n");
910 #else
911 #ifdef USE_GDBM
912 fprintf(f, "Probably GDBM (native mode)\n");
913 #else
914 fprintf(f, "Probably GDBM (compatibility mode)\n");
915 #endif
916 #endif
917 }
918
919
920 /* This function is called for -bV/--version and for -d to output the optional
921 features of the current Exim binary.
922
923 Arguments: a FILE for printing
924 Returns: nothing
925 */
926
927 static void
show_whats_supported(FILE * fp)928 show_whats_supported(FILE * fp)
929 {
930 rmark reset_point = store_mark();
931 gstring * g;
932 DEBUG(D_any) {} else show_db_version(fp);
933
934 g = string_cat(NULL, US"Support for:");
935 #ifdef SUPPORT_CRYPTEQ
936 g = string_cat(g, US" crypteq");
937 #endif
938 #if HAVE_ICONV
939 g = string_cat(g, US" iconv()");
940 #endif
941 #if HAVE_IPV6
942 g = string_cat(g, US" IPv6");
943 #endif
944 #ifdef HAVE_SETCLASSRESOURCES
945 g = string_cat(g, US" use_setclassresources");
946 #endif
947 #ifdef SUPPORT_PAM
948 g = string_cat(g, US" PAM");
949 #endif
950 #ifdef EXIM_PERL
951 g = string_cat(g, US" Perl");
952 #endif
953 #ifdef EXPAND_DLFUNC
954 g = string_cat(g, US" Expand_dlfunc");
955 #endif
956 #ifdef USE_TCP_WRAPPERS
957 g = string_cat(g, US" TCPwrappers");
958 #endif
959 #ifdef USE_GNUTLS
960 g = string_cat(g, US" GnuTLS");
961 #endif
962 #ifdef USE_OPENSSL
963 g = string_cat(g, US" OpenSSL");
964 #endif
965 #ifndef DISABLE_TLS_RESUME
966 g = string_cat(g, US" TLS_resume");
967 #endif
968 #ifdef SUPPORT_TRANSLATE_IP_ADDRESS
969 g = string_cat(g, US" translate_ip_address");
970 #endif
971 #ifdef SUPPORT_MOVE_FROZEN_MESSAGES
972 g = string_cat(g, US" move_frozen_messages");
973 #endif
974 #ifdef WITH_CONTENT_SCAN
975 g = string_cat(g, US" Content_Scanning");
976 #endif
977 #ifdef SUPPORT_DANE
978 g = string_cat(g, US" DANE");
979 #endif
980 #ifndef DISABLE_DKIM
981 g = string_cat(g, US" DKIM");
982 #endif
983 #ifdef SUPPORT_DMARC
984 g = string_cat(g, US" DMARC");
985 #endif
986 #ifndef DISABLE_DNSSEC
987 g = string_cat(g, US" DNSSEC");
988 #endif
989 #ifndef DISABLE_EVENT
990 g = string_cat(g, US" Event");
991 #endif
992 #ifdef SUPPORT_I18N
993 g = string_cat(g, US" I18N");
994 #endif
995 #ifndef DISABLE_OCSP
996 g = string_cat(g, US" OCSP");
997 #endif
998 #ifndef DISABLE_PIPE_CONNECT
999 g = string_cat(g, US" PIPE_CONNECT");
1000 #endif
1001 #ifndef DISABLE_PRDR
1002 g = string_cat(g, US" PRDR");
1003 #endif
1004 #ifdef SUPPORT_PROXY
1005 g = string_cat(g, US" PROXY");
1006 #endif
1007 #ifndef DISABLE_QUEUE_RAMP
1008 g = string_cat(g, US" Experimental_Queue_Ramp");
1009 #endif
1010 #ifdef SUPPORT_SOCKS
1011 g = string_cat(g, US" SOCKS");
1012 #endif
1013 #ifdef SUPPORT_SPF
1014 g = string_cat(g, US" SPF");
1015 #endif
1016 #if defined(SUPPORT_SRS)
1017 g = string_cat(g, US" SRS");
1018 #endif
1019 #ifdef TCP_FASTOPEN
1020 tcp_init();
1021 if (f.tcp_fastopen_ok) g = string_cat(g, US" TCP_Fast_Open");
1022 #endif
1023 #ifdef EXPERIMENTAL_ARC
1024 g = string_cat(g, US" Experimental_ARC");
1025 #endif
1026 #ifdef EXPERIMENTAL_BRIGHTMAIL
1027 g = string_cat(g, US" Experimental_Brightmail");
1028 #endif
1029 #ifdef EXPERIMENTAL_DCC
1030 g = string_cat(g, US" Experimental_DCC");
1031 #endif
1032 #ifdef EXPERIMENTAL_DSN_INFO
1033 g = string_cat(g, US" Experimental_DSN_info");
1034 #endif
1035 #ifdef EXPERIMENTAL_ESMTP_LIMITS
1036 g = string_cat(g, US" Experimental_ESMTP_Limits");
1037 #endif
1038 #ifdef EXPERIMENTAL_QUEUEFILE
1039 g = string_cat(g, US" Experimental_QUEUEFILE");
1040 #endif
1041 #if defined(EXPERIMENTAL_SRS_ALT)
1042 g = string_cat(g, US" Experimental_SRS");
1043 #endif
1044 g = string_cat(g, US"\n");
1045
1046 g = string_cat(g, US"Lookups (built-in):");
1047 #if defined(LOOKUP_LSEARCH) && LOOKUP_LSEARCH!=2
1048 g = string_cat(g, US" lsearch wildlsearch nwildlsearch iplsearch");
1049 #endif
1050 #if defined(LOOKUP_CDB) && LOOKUP_CDB!=2
1051 g = string_cat(g, US" cdb");
1052 #endif
1053 #if defined(LOOKUP_DBM) && LOOKUP_DBM!=2
1054 g = string_cat(g, US" dbm dbmjz dbmnz");
1055 #endif
1056 #if defined(LOOKUP_DNSDB) && LOOKUP_DNSDB!=2
1057 g = string_cat(g, US" dnsdb");
1058 #endif
1059 #if defined(LOOKUP_DSEARCH) && LOOKUP_DSEARCH!=2
1060 g = string_cat(g, US" dsearch");
1061 #endif
1062 #if defined(LOOKUP_IBASE) && LOOKUP_IBASE!=2
1063 g = string_cat(g, US" ibase");
1064 #endif
1065 #if defined(LOOKUP_JSON) && LOOKUP_JSON!=2
1066 g = string_cat(g, US" json");
1067 #endif
1068 #if defined(LOOKUP_LDAP) && LOOKUP_LDAP!=2
1069 g = string_cat(g, US" ldap ldapdn ldapm");
1070 #endif
1071 #ifdef LOOKUP_LMDB
1072 g = string_cat(g, US" lmdb");
1073 #endif
1074 #if defined(LOOKUP_MYSQL) && LOOKUP_MYSQL!=2
1075 g = string_cat(g, US" mysql");
1076 #endif
1077 #if defined(LOOKUP_NIS) && LOOKUP_NIS!=2
1078 g = string_cat(g, US" nis nis0");
1079 #endif
1080 #if defined(LOOKUP_NISPLUS) && LOOKUP_NISPLUS!=2
1081 g = string_cat(g, US" nisplus");
1082 #endif
1083 #if defined(LOOKUP_ORACLE) && LOOKUP_ORACLE!=2
1084 g = string_cat(g, US" oracle");
1085 #endif
1086 #if defined(LOOKUP_PASSWD) && LOOKUP_PASSWD!=2
1087 g = string_cat(g, US" passwd");
1088 #endif
1089 #if defined(LOOKUP_PGSQL) && LOOKUP_PGSQL!=2
1090 g = string_cat(g, US" pgsql");
1091 #endif
1092 #if defined(LOOKUP_REDIS) && LOOKUP_REDIS!=2
1093 g = string_cat(g, US" redis");
1094 #endif
1095 #if defined(LOOKUP_SQLITE) && LOOKUP_SQLITE!=2
1096 g = string_cat(g, US" sqlite");
1097 #endif
1098 #if defined(LOOKUP_TESTDB) && LOOKUP_TESTDB!=2
1099 g = string_cat(g, US" testdb");
1100 #endif
1101 #if defined(LOOKUP_WHOSON) && LOOKUP_WHOSON!=2
1102 g = string_cat(g, US" whoson");
1103 #endif
1104 g = string_cat(g, US"\n");
1105
1106 g = auth_show_supported(g);
1107 g = route_show_supported(g);
1108 g = transport_show_supported(g);
1109
1110 #ifdef WITH_CONTENT_SCAN
1111 g = malware_show_supported(g);
1112 #endif
1113
1114 if (fixed_never_users[0] > 0)
1115 {
1116 int i;
1117 g = string_cat(g, US"Fixed never_users: ");
1118 for (i = 1; i <= (int)fixed_never_users[0] - 1; i++)
1119 string_fmt_append(g, "%u:", (unsigned)fixed_never_users[i]);
1120 g = string_fmt_append(g, "%u\n", (unsigned)fixed_never_users[i]);
1121 }
1122
1123 g = string_fmt_append(g, "Configure owner: %d:%d\n", config_uid, config_gid);
1124 fputs(CS string_from_gstring(g), fp);
1125
1126 fprintf(fp, "Size of off_t: " SIZE_T_FMT "\n", sizeof(off_t));
1127
1128 /* Everything else is details which are only worth reporting when debugging.
1129 Perhaps the tls_version_report should move into this too. */
1130 DEBUG(D_any) do {
1131
1132 /* clang defines __GNUC__ (at least, for me) so test for it first */
1133 #if defined(__clang__)
1134 fprintf(fp, "Compiler: CLang [%s]\n", __clang_version__);
1135 #elif defined(__GNUC__)
1136 fprintf(fp, "Compiler: GCC [%s]\n",
1137 # ifdef __VERSION__
1138 __VERSION__
1139 # else
1140 "? unknown version ?"
1141 # endif
1142 );
1143 #else
1144 fprintf(fp, "Compiler: <unknown>\n");
1145 #endif
1146
1147 #if defined(__GLIBC__) && !defined(__UCLIBC__)
1148 fprintf(fp, "Library version: Glibc: Compile: %d.%d\n",
1149 __GLIBC__, __GLIBC_MINOR__);
1150 if (__GLIBC_PREREQ(2, 1))
1151 fprintf(fp, " Runtime: %s\n",
1152 gnu_get_libc_version());
1153 #endif
1154
1155 show_db_version(fp);
1156
1157 #ifndef DISABLE_TLS
1158 tls_version_report(fp);
1159 #endif
1160 #ifdef SUPPORT_I18N
1161 utf8_version_report(fp);
1162 #endif
1163 #ifdef SUPPORT_DMARC
1164 dmarc_version_report(fp);
1165 #endif
1166 #ifdef SUPPORT_SPF
1167 spf_lib_version_report(fp);
1168 #endif
1169
1170 for (auth_info * authi = auths_available; *authi->driver_name != '\0'; ++authi)
1171 if (authi->version_report)
1172 (*authi->version_report)(fp);
1173
1174 /* PCRE_PRERELEASE is either defined and empty or a bare sequence of
1175 characters; unless it's an ancient version of PCRE in which case it
1176 is not defined. */
1177 #ifndef PCRE_PRERELEASE
1178 # define PCRE_PRERELEASE
1179 #endif
1180 #define QUOTE(X) #X
1181 #define EXPAND_AND_QUOTE(X) QUOTE(X)
1182 fprintf(fp, "Library version: PCRE: Compile: %d.%d%s\n"
1183 " Runtime: %s\n",
1184 PCRE_MAJOR, PCRE_MINOR,
1185 EXPAND_AND_QUOTE(PCRE_PRERELEASE) "",
1186 pcre_version());
1187 #undef QUOTE
1188 #undef EXPAND_AND_QUOTE
1189
1190 init_lookup_list();
1191 for (int i = 0; i < lookup_list_count; i++)
1192 if (lookup_list[i]->version_report)
1193 lookup_list[i]->version_report(fp);
1194
1195 #ifdef WHITELIST_D_MACROS
1196 fprintf(fp, "WHITELIST_D_MACROS: \"%s\"\n", WHITELIST_D_MACROS);
1197 #else
1198 fprintf(fp, "WHITELIST_D_MACROS unset\n");
1199 #endif
1200 #ifdef TRUSTED_CONFIG_LIST
1201 fprintf(fp, "TRUSTED_CONFIG_LIST: \"%s\"\n", TRUSTED_CONFIG_LIST);
1202 #else
1203 fprintf(fp, "TRUSTED_CONFIG_LIST unset\n");
1204 #endif
1205
1206 } while (0);
1207 store_reset(reset_point);
1208 }
1209
1210
1211 /*************************************************
1212 * Show auxiliary information about Exim *
1213 *************************************************/
1214
1215 static void
show_exim_information(enum commandline_info request,FILE * stream)1216 show_exim_information(enum commandline_info request, FILE *stream)
1217 {
1218 switch(request)
1219 {
1220 case CMDINFO_NONE:
1221 fprintf(stream, "Oops, something went wrong.\n");
1222 return;
1223 case CMDINFO_HELP:
1224 fprintf(stream,
1225 "The -bI: flag takes a string indicating which information to provide.\n"
1226 "If the string is not recognised, you'll get this help (on stderr).\n"
1227 "\n"
1228 " exim -bI:help this information\n"
1229 " exim -bI:dscp list of known dscp value keywords\n"
1230 " exim -bI:sieve list of supported sieve extensions\n"
1231 );
1232 return;
1233 case CMDINFO_SIEVE:
1234 for (const uschar ** pp = exim_sieve_extension_list; *pp; ++pp)
1235 fprintf(stream, "%s\n", *pp);
1236 return;
1237 case CMDINFO_DSCP:
1238 dscp_list_to_stream(stream);
1239 return;
1240 }
1241 }
1242
1243
1244 /*************************************************
1245 * Quote a local part *
1246 *************************************************/
1247
1248 /* This function is used when a sender address or a From: or Sender: header
1249 line is being created from the caller's login, or from an authenticated_id. It
1250 applies appropriate quoting rules for a local part.
1251
1252 Argument: the local part
1253 Returns: the local part, quoted if necessary
1254 */
1255
1256 uschar *
local_part_quote(uschar * lpart)1257 local_part_quote(uschar *lpart)
1258 {
1259 BOOL needs_quote = FALSE;
1260 gstring * g;
1261
1262 for (uschar * t = lpart; !needs_quote && *t != 0; t++)
1263 {
1264 needs_quote = !isalnum(*t) && strchr("!#$%&'*+-/=?^_`{|}~", *t) == NULL &&
1265 (*t != '.' || t == lpart || t[1] == 0);
1266 }
1267
1268 if (!needs_quote) return lpart;
1269
1270 g = string_catn(NULL, US"\"", 1);
1271
1272 for (;;)
1273 {
1274 uschar *nq = US Ustrpbrk(lpart, "\\\"");
1275 if (nq == NULL)
1276 {
1277 g = string_cat(g, lpart);
1278 break;
1279 }
1280 g = string_catn(g, lpart, nq - lpart);
1281 g = string_catn(g, US"\\", 1);
1282 g = string_catn(g, nq, 1);
1283 lpart = nq + 1;
1284 }
1285
1286 g = string_catn(g, US"\"", 1);
1287 return string_from_gstring(g);
1288 }
1289
1290
1291
1292 #ifdef USE_READLINE
1293 /*************************************************
1294 * Load readline() functions *
1295 *************************************************/
1296
1297 /* This function is called from testing executions that read data from stdin,
1298 but only when running as the calling user. Currently, only -be does this. The
1299 function loads the readline() function library and passes back the functions.
1300 On some systems, it needs the curses library, so load that too, but try without
1301 it if loading fails. All this functionality has to be requested at build time.
1302
1303 Arguments:
1304 fn_readline_ptr pointer to where to put the readline pointer
1305 fn_addhist_ptr pointer to where to put the addhistory function
1306
1307 Returns: the dlopen handle or NULL on failure
1308 */
1309
1310 static void *
set_readline(char * (** fn_readline_ptr)(const char *),void (** fn_addhist_ptr)(const char *))1311 set_readline(char * (**fn_readline_ptr)(const char *),
1312 void (**fn_addhist_ptr)(const char *))
1313 {
1314 void *dlhandle;
1315 void *dlhandle_curses = dlopen("libcurses." DYNLIB_FN_EXT, RTLD_GLOBAL|RTLD_LAZY);
1316
1317 dlhandle = dlopen("libreadline." DYNLIB_FN_EXT, RTLD_GLOBAL|RTLD_NOW);
1318 if (dlhandle_curses) dlclose(dlhandle_curses);
1319
1320 if (dlhandle)
1321 {
1322 /* Checked manual pages; at least in GNU Readline 6.1, the prototypes are:
1323 * char * readline (const char *prompt);
1324 * void add_history (const char *string);
1325 */
1326 *fn_readline_ptr = (char *(*)(const char*))dlsym(dlhandle, "readline");
1327 *fn_addhist_ptr = (void(*)(const char*))dlsym(dlhandle, "add_history");
1328 }
1329 else
1330 DEBUG(D_any) debug_printf("failed to load readline: %s\n", dlerror());
1331
1332 return dlhandle;
1333 }
1334 #endif
1335
1336
1337
1338 /*************************************************
1339 * Get a line from stdin for testing things *
1340 *************************************************/
1341
1342 /* This function is called when running tests that can take a number of lines
1343 of input (for example, -be and -bt). It handles continuations and trailing
1344 spaces. And prompting and a blank line output on eof. If readline() is in use,
1345 the arguments are non-NULL and provide the relevant functions.
1346
1347 Arguments:
1348 fn_readline readline function or NULL
1349 fn_addhist addhist function or NULL
1350
1351 Returns: pointer to dynamic memory, or NULL at end of file
1352 */
1353
1354 static uschar *
get_stdinput(char * (* fn_readline)(const char *),void (* fn_addhist)(const char *))1355 get_stdinput(char *(*fn_readline)(const char *), void(*fn_addhist)(const char *))
1356 {
1357 gstring * g = NULL;
1358
1359 if (!fn_readline) { printf("> "); fflush(stdout); }
1360
1361 for (int i = 0;; i++)
1362 {
1363 uschar buffer[1024];
1364 uschar *p, *ss;
1365
1366 #ifdef USE_READLINE
1367 char *readline_line = NULL;
1368 if (fn_readline)
1369 {
1370 if (!(readline_line = fn_readline((i > 0)? "":"> "))) break;
1371 if (*readline_line != 0 && fn_addhist) fn_addhist(readline_line);
1372 p = US readline_line;
1373 }
1374 else
1375 #endif
1376
1377 /* readline() not in use */
1378
1379 {
1380 if (Ufgets(buffer, sizeof(buffer), stdin) == NULL) break;
1381 p = buffer;
1382 }
1383
1384 /* Handle the line */
1385
1386 ss = p + (int)Ustrlen(p);
1387 while (ss > p && isspace(ss[-1])) ss--;
1388
1389 if (i > 0)
1390 while (p < ss && isspace(*p)) p++; /* leading space after cont */
1391
1392 g = string_catn(g, p, ss - p);
1393
1394 #ifdef USE_READLINE
1395 if (fn_readline) free(readline_line);
1396 #endif
1397
1398 /* g can only be NULL if ss==p */
1399 if (ss == p || g->s[g->ptr-1] != '\\')
1400 break;
1401
1402 --g->ptr;
1403 (void) string_from_gstring(g);
1404 }
1405
1406 if (!g) printf("\n");
1407 return string_from_gstring(g);
1408 }
1409
1410
1411
1412 /*************************************************
1413 * Output usage information for the program *
1414 *************************************************/
1415
1416 /* This function is called when there are no recipients
1417 or a specific --help argument was added.
1418
1419 Arguments:
1420 progname information on what name we were called by
1421
1422 Returns: DOES NOT RETURN
1423 */
1424
1425 static void
exim_usage(uschar * progname)1426 exim_usage(uschar *progname)
1427 {
1428
1429 /* Handle specific program invocation variants */
1430 if (Ustrcmp(progname, US"-mailq") == 0)
1431 exim_fail(
1432 "mailq - list the contents of the mail queue\n\n"
1433 "For a list of options, see the Exim documentation.\n");
1434
1435 /* Generic usage - we output this whatever happens */
1436 exim_fail(
1437 "Exim is a Mail Transfer Agent. It is normally called by Mail User Agents,\n"
1438 "not directly from a shell command line. Options and/or arguments control\n"
1439 "what it does when called. For a list of options, see the Exim documentation.\n");
1440 }
1441
1442
1443
1444 /*************************************************
1445 * Validate that the macros given are okay *
1446 *************************************************/
1447
1448 /* Typically, Exim will drop privileges if macros are supplied. In some
1449 cases, we want to not do so.
1450
1451 Arguments: opt_D_used - true if the commandline had a "-D" option
1452 Returns: true if trusted, false otherwise
1453 */
1454
1455 static BOOL
macros_trusted(BOOL opt_D_used)1456 macros_trusted(BOOL opt_D_used)
1457 {
1458 #ifdef WHITELIST_D_MACROS
1459 uschar *whitelisted, *end, *p, **whites;
1460 int white_count, i, n;
1461 size_t len;
1462 BOOL prev_char_item, found;
1463 #endif
1464
1465 if (!opt_D_used)
1466 return TRUE;
1467 #ifndef WHITELIST_D_MACROS
1468 return FALSE;
1469 #else
1470
1471 /* We only trust -D overrides for some invoking users:
1472 root, the exim run-time user, the optional config owner user.
1473 I don't know why config-owner would be needed, but since they can own the
1474 config files anyway, there's no security risk to letting them override -D. */
1475 if ( ! ((real_uid == root_uid)
1476 || (real_uid == exim_uid)
1477 #ifdef CONFIGURE_OWNER
1478 || (real_uid == config_uid)
1479 #endif
1480 ))
1481 {
1482 debug_printf("macros_trusted rejecting macros for uid %d\n", (int) real_uid);
1483 return FALSE;
1484 }
1485
1486 /* Get a list of macros which are whitelisted */
1487 whitelisted = string_copy_perm(US WHITELIST_D_MACROS, FALSE);
1488 prev_char_item = FALSE;
1489 white_count = 0;
1490 for (p = whitelisted; *p != '\0'; ++p)
1491 {
1492 if (*p == ':' || isspace(*p))
1493 {
1494 *p = '\0';
1495 if (prev_char_item)
1496 ++white_count;
1497 prev_char_item = FALSE;
1498 continue;
1499 }
1500 if (!prev_char_item)
1501 prev_char_item = TRUE;
1502 }
1503 end = p;
1504 if (prev_char_item)
1505 ++white_count;
1506 if (!white_count)
1507 return FALSE;
1508 whites = store_malloc(sizeof(uschar *) * (white_count+1));
1509 for (p = whitelisted, i = 0; (p != end) && (i < white_count); ++p)
1510 {
1511 if (*p != '\0')
1512 {
1513 whites[i++] = p;
1514 if (i == white_count)
1515 break;
1516 while (*p != '\0' && p < end)
1517 ++p;
1518 }
1519 }
1520 whites[i] = NULL;
1521
1522 /* The list of commandline macros should be very short.
1523 Accept the N*M complexity. */
1524 for (macro_item * m = macros_user; m; m = m->next) if (m->command_line)
1525 {
1526 found = FALSE;
1527 for (uschar ** w = whites; *w; ++w)
1528 if (Ustrcmp(*w, m->name) == 0)
1529 {
1530 found = TRUE;
1531 break;
1532 }
1533 if (!found)
1534 return FALSE;
1535 if (!m->replacement)
1536 continue;
1537 if ((len = m->replen) == 0)
1538 continue;
1539 n = pcre_exec(regex_whitelisted_macro, NULL, CS m->replacement, len,
1540 0, PCRE_EOPT, NULL, 0);
1541 if (n < 0)
1542 {
1543 if (n != PCRE_ERROR_NOMATCH)
1544 debug_printf("macros_trusted checking %s returned %d\n", m->name, n);
1545 return FALSE;
1546 }
1547 }
1548 DEBUG(D_any) debug_printf("macros_trusted overridden to true by whitelisting\n");
1549 return TRUE;
1550 #endif
1551 }
1552
1553
1554 /*************************************************
1555 * Expansion testing *
1556 *************************************************/
1557
1558 /* Expand and print one item, doing macro-processing.
1559
1560 Arguments:
1561 item line for expansion
1562 */
1563
1564 static void
expansion_test_line(const uschar * line)1565 expansion_test_line(const uschar * line)
1566 {
1567 int len;
1568 BOOL dummy_macexp;
1569 uschar * s;
1570
1571 Ustrncpy(big_buffer, line, big_buffer_size);
1572 big_buffer[big_buffer_size-1] = '\0';
1573 len = Ustrlen(big_buffer);
1574
1575 (void) macros_expand(0, &len, &dummy_macexp);
1576
1577 if (isupper(big_buffer[0]))
1578 {
1579 if (macro_read_assignment(big_buffer))
1580 printf("Defined macro '%s'\n", mlast->name);
1581 }
1582 else
1583 if ((s = expand_string(big_buffer))) printf("%s\n", CS s);
1584 else printf("Failed: %s\n", expand_string_message);
1585 }
1586
1587
1588
1589 /*************************************************
1590 * Entry point and high-level code *
1591 *************************************************/
1592
1593 /* Entry point for the Exim mailer. Analyse the arguments and arrange to take
1594 the appropriate action. All the necessary functions are present in the one
1595 binary. I originally thought one should split it up, but it turns out that so
1596 much of the apparatus is needed in each chunk that one might as well just have
1597 it all available all the time, which then makes the coding easier as well.
1598
1599 Arguments:
1600 argc count of entries in argv
1601 argv argument strings, with argv[0] being the program name
1602
1603 Returns: EXIT_SUCCESS if terminated successfully
1604 EXIT_FAILURE otherwise, except when a message has been sent
1605 to the sender, and -oee was given
1606 */
1607
1608 int
main(int argc,char ** cargv)1609 main(int argc, char **cargv)
1610 {
1611 uschar **argv = USS cargv;
1612 int arg_receive_timeout = -1;
1613 int arg_smtp_receive_timeout = -1;
1614 int arg_error_handling = error_handling;
1615 int filter_sfd = -1;
1616 int filter_ufd = -1;
1617 int group_count;
1618 int i, rv;
1619 int list_queue_option = 0;
1620 int msg_action = 0;
1621 int msg_action_arg = -1;
1622 int namelen = (argv[0] == NULL)? 0 : Ustrlen(argv[0]);
1623 int queue_only_reason = 0;
1624 #ifdef EXIM_PERL
1625 int perl_start_option = 0;
1626 #endif
1627 int recipients_arg = argc;
1628 int sender_address_domain = 0;
1629 int test_retry_arg = -1;
1630 int test_rewrite_arg = -1;
1631 gid_t original_egid;
1632 BOOL arg_queue_only = FALSE;
1633 BOOL bi_option = FALSE;
1634 BOOL checking = FALSE;
1635 BOOL count_queue = FALSE;
1636 BOOL expansion_test = FALSE;
1637 BOOL extract_recipients = FALSE;
1638 BOOL flag_G = FALSE;
1639 BOOL flag_n = FALSE;
1640 BOOL forced_delivery = FALSE;
1641 BOOL f_end_dot = FALSE;
1642 BOOL deliver_give_up = FALSE;
1643 BOOL list_queue = FALSE;
1644 BOOL list_options = FALSE;
1645 BOOL list_config = FALSE;
1646 BOOL local_queue_only;
1647 BOOL more = TRUE;
1648 BOOL one_msg_action = FALSE;
1649 BOOL opt_D_used = FALSE;
1650 BOOL queue_only_set = FALSE;
1651 BOOL receiving_message = TRUE;
1652 BOOL sender_ident_set = FALSE;
1653 BOOL session_local_queue_only;
1654 BOOL unprivileged;
1655 BOOL removed_privilege = FALSE;
1656 BOOL usage_wanted = FALSE;
1657 BOOL verify_address_mode = FALSE;
1658 BOOL verify_as_sender = FALSE;
1659 BOOL rcpt_verify_quota = FALSE;
1660 BOOL version_printed = FALSE;
1661 uschar *alias_arg = NULL;
1662 uschar *called_as = US"";
1663 uschar *cmdline_syslog_name = NULL;
1664 uschar *start_queue_run_id = NULL;
1665 uschar *stop_queue_run_id = NULL;
1666 uschar *expansion_test_message = NULL;
1667 const uschar *ftest_domain = NULL;
1668 const uschar *ftest_localpart = NULL;
1669 const uschar *ftest_prefix = NULL;
1670 const uschar *ftest_suffix = NULL;
1671 uschar *log_oneline = NULL;
1672 uschar *malware_test_file = NULL;
1673 uschar *real_sender_address;
1674 uschar *originator_home = US"/";
1675 size_t sz;
1676
1677 struct passwd *pw;
1678 struct stat statbuf;
1679 pid_t passed_qr_pid = (pid_t)0;
1680 int passed_qr_pipe = -1;
1681 gid_t group_list[EXIM_GROUPLIST_SIZE];
1682
1683 /* For the -bI: flag */
1684 enum commandline_info info_flag = CMDINFO_NONE;
1685 BOOL info_stdout = FALSE;
1686
1687 /* Possible options for -R and -S */
1688
1689 static uschar *rsopts[] = { US"f", US"ff", US"r", US"rf", US"rff" };
1690
1691 /* Need to define this in case we need to change the environment in order
1692 to get rid of a bogus time zone. We have to make it char rather than uschar
1693 because some OS define it in /usr/include/unistd.h. */
1694
1695 extern char **environ;
1696
1697 #ifdef MEASURE_TIMING
1698 (void)gettimeofday(×tamp_startup, NULL);
1699 #endif
1700
1701 store_init(); /* Initialise the memory allocation susbsystem */
1702
1703 /* If the Exim user and/or group and/or the configuration file owner/group were
1704 defined by ref:name at build time, we must now find the actual uid/gid values.
1705 This is a feature to make the lives of binary distributors easier. */
1706
1707 #ifdef EXIM_USERNAME
1708 if (route_finduser(US EXIM_USERNAME, &pw, &exim_uid))
1709 {
1710 if (exim_uid == 0)
1711 exim_fail("exim: refusing to run with uid 0 for \"%s\"\n", EXIM_USERNAME);
1712
1713 /* If ref:name uses a number as the name, route_finduser() returns
1714 TRUE with exim_uid set and pw coerced to NULL. */
1715 if (pw)
1716 exim_gid = pw->pw_gid;
1717 #ifndef EXIM_GROUPNAME
1718 else
1719 exim_fail(
1720 "exim: ref:name should specify a usercode, not a group.\n"
1721 "exim: can't let you get away with it unless you also specify a group.\n");
1722 #endif
1723 }
1724 else
1725 exim_fail("exim: failed to find uid for user name \"%s\"\n", EXIM_USERNAME);
1726 #endif
1727
1728 #ifdef EXIM_GROUPNAME
1729 if (!route_findgroup(US EXIM_GROUPNAME, &exim_gid))
1730 exim_fail("exim: failed to find gid for group name \"%s\"\n", EXIM_GROUPNAME);
1731 #endif
1732
1733 #ifdef CONFIGURE_OWNERNAME
1734 if (!route_finduser(US CONFIGURE_OWNERNAME, NULL, &config_uid))
1735 exim_fail("exim: failed to find uid for user name \"%s\"\n",
1736 CONFIGURE_OWNERNAME);
1737 #endif
1738
1739 /* We default the system_filter_user to be the Exim run-time user, as a
1740 sane non-root value. */
1741 system_filter_uid = exim_uid;
1742
1743 #ifdef CONFIGURE_GROUPNAME
1744 if (!route_findgroup(US CONFIGURE_GROUPNAME, &config_gid))
1745 exim_fail("exim: failed to find gid for group name \"%s\"\n",
1746 CONFIGURE_GROUPNAME);
1747 #endif
1748
1749 /* In the Cygwin environment, some initialization used to need doing.
1750 It was fudged in by means of this macro; now no longer but we'll leave
1751 it in case of others. */
1752
1753 #ifdef OS_INIT
1754 OS_INIT
1755 #endif
1756
1757 /* Check a field which is patched when we are running Exim within its
1758 testing harness; do a fast initial check, and then the whole thing. */
1759
1760 f.running_in_test_harness =
1761 *running_status == '<' && Ustrcmp(running_status, "<<<testing>>>") == 0;
1762 if (f.running_in_test_harness)
1763 debug_store = TRUE;
1764
1765 /* Protect against abusive argv[0] */
1766 exim_str_fail_toolong(argv[0], PATH_MAX, "argv[0]");
1767
1768 /* The C standard says that the equivalent of setlocale(LC_ALL, "C") is obeyed
1769 at the start of a program; however, it seems that some environments do not
1770 follow this. A "strange" locale can affect the formatting of timestamps, so we
1771 make quite sure. */
1772
1773 setlocale(LC_ALL, "C");
1774
1775 /* Get the offset between CLOCK_MONOTONIC/CLOCK_BOOTTIME and wallclock */
1776
1777 #ifdef _POSIX_MONOTONIC_CLOCK
1778 exim_clock_init();
1779 #endif
1780
1781 /* Set up the default handler for timing using alarm(). */
1782
1783 os_non_restarting_signal(SIGALRM, sigalrm_handler);
1784
1785 /* Ensure we have a buffer for constructing log entries. Use malloc directly,
1786 because store_malloc writes a log entry on failure. */
1787
1788 if (!(log_buffer = US malloc(LOG_BUFFER_SIZE)))
1789 exim_fail("exim: failed to get store for log buffer\n");
1790
1791 /* Initialize the default log options. */
1792
1793 bits_set(log_selector, log_selector_size, log_default);
1794
1795 /* Set log_stderr to stderr, provided that stderr exists. This gets reset to
1796 NULL when the daemon is run and the file is closed. We have to use this
1797 indirection, because some systems don't allow writing to the variable "stderr".
1798 */
1799
1800 if (fstat(fileno(stderr), &statbuf) >= 0) log_stderr = stderr;
1801
1802 /* Arrange for the PCRE regex library to use our store functions. Note that
1803 the normal calls are actually macros that add additional arguments for
1804 debugging purposes so we have to assign specially constructed functions here.
1805 The default is to use store in the stacking pool, but this is overridden in the
1806 regex_must_compile() function. */
1807
1808 pcre_malloc = function_store_get;
1809 pcre_free = function_dummy_free;
1810
1811 /* Ensure there is a big buffer for temporary use in several places. It is put
1812 in malloc store so that it can be freed for enlargement if necessary. */
1813
1814 big_buffer = store_malloc(big_buffer_size);
1815
1816 /* Set up the handler for the data request signal, and set the initial
1817 descriptive text. */
1818
1819 process_info = store_get(PROCESS_INFO_SIZE, TRUE); /* tainted */
1820 set_process_info("initializing");
1821 os_restarting_signal(SIGUSR1, usr1_handler); /* exiwhat */
1822 signal(SIGSEGV, segv_handler); /* log faults */
1823
1824 /* If running in a dockerized environment, the TERM signal is only
1825 delegated to the PID 1 if we request it by setting an signal handler */
1826 if (getpid() == 1) signal(SIGTERM, term_handler);
1827
1828 /* SIGHUP is used to get the daemon to reconfigure. It gets set as appropriate
1829 in the daemon code. For the rest of Exim's uses, we ignore it. */
1830
1831 signal(SIGHUP, SIG_IGN);
1832
1833 /* We don't want to die on pipe errors as the code is written to handle
1834 the write error instead. */
1835
1836 signal(SIGPIPE, SIG_IGN);
1837
1838 /* Under some circumstance on some OS, Exim can get called with SIGCHLD
1839 set to SIG_IGN. This causes subprocesses that complete before the parent
1840 process waits for them not to hang around, so when Exim calls wait(), nothing
1841 is there. The wait() code has been made robust against this, but let's ensure
1842 that SIGCHLD is set to SIG_DFL, because it's tidier to wait and get a process
1843 ending status. We use sigaction rather than plain signal() on those OS where
1844 SA_NOCLDWAIT exists, because we want to be sure it is turned off. (There was a
1845 problem on AIX with this.) */
1846
1847 #ifdef SA_NOCLDWAIT
1848 {
1849 struct sigaction act;
1850 act.sa_handler = SIG_DFL;
1851 sigemptyset(&(act.sa_mask));
1852 act.sa_flags = 0;
1853 sigaction(SIGCHLD, &act, NULL);
1854 }
1855 #else
1856 signal(SIGCHLD, SIG_DFL);
1857 #endif
1858
1859 /* Save the arguments for use if we re-exec exim as a daemon after receiving
1860 SIGHUP. */
1861
1862 sighup_argv = argv;
1863
1864 /* Set up the version number. Set up the leading 'E' for the external form of
1865 message ids, set the pointer to the internal form, and initialize it to
1866 indicate no message being processed. */
1867
1868 version_init();
1869 message_id_option[0] = '-';
1870 message_id_external = message_id_option + 1;
1871 message_id_external[0] = 'E';
1872 message_id = message_id_external + 1;
1873 message_id[0] = 0;
1874
1875 /* Set the umask to zero so that any files Exim creates using open() are
1876 created with the modes that it specifies. NOTE: Files created with fopen() have
1877 a problem, which was not recognized till rather late (February 2006). With this
1878 umask, such files will be world writeable. (They are all content scanning files
1879 in the spool directory, which isn't world-accessible, so this is not a
1880 disaster, but it's untidy.) I don't want to change this overall setting,
1881 however, because it will interact badly with the open() calls. Instead, there's
1882 now a function called modefopen() that fiddles with the umask while calling
1883 fopen(). */
1884
1885 (void)umask(0);
1886
1887 /* Precompile the regular expression for matching a message id. Keep this in
1888 step with the code that generates ids in the accept.c module. We need to do
1889 this here, because the -M options check their arguments for syntactic validity
1890 using mac_ismsgid, which uses this. */
1891
1892 regex_ismsgid =
1893 regex_must_compile(US"^(?:[^\\W_]{6}-){2}[^\\W_]{2}$", FALSE, TRUE);
1894
1895 /* Precompile the regular expression that is used for matching an SMTP error
1896 code, possibly extended, at the start of an error message. Note that the
1897 terminating whitespace character is included. */
1898
1899 regex_smtp_code =
1900 regex_must_compile(US"^\\d\\d\\d\\s(?:\\d\\.\\d\\d?\\d?\\.\\d\\d?\\d?\\s)?",
1901 FALSE, TRUE);
1902
1903 #ifdef WHITELIST_D_MACROS
1904 /* Precompile the regular expression used to filter the content of macros
1905 given to -D for permissibility. */
1906
1907 regex_whitelisted_macro =
1908 regex_must_compile(US"^[A-Za-z0-9_/.-]*$", FALSE, TRUE);
1909 #endif
1910
1911 for (i = 0; i < REGEX_VARS; i++) regex_vars[i] = NULL;
1912
1913 /* If the program is called as "mailq" treat it as equivalent to "exim -bp";
1914 this seems to be a generally accepted convention, since one finds symbolic
1915 links called "mailq" in standard OS configurations. */
1916
1917 if ((namelen == 5 && Ustrcmp(argv[0], "mailq") == 0) ||
1918 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/mailq", 6) == 0))
1919 {
1920 list_queue = TRUE;
1921 receiving_message = FALSE;
1922 called_as = US"-mailq";
1923 }
1924
1925 /* If the program is called as "rmail" treat it as equivalent to
1926 "exim -i -oee", thus allowing UUCP messages to be input using non-SMTP mode,
1927 i.e. preventing a single dot on a line from terminating the message, and
1928 returning with zero return code, even in cases of error (provided an error
1929 message has been sent). */
1930
1931 if ((namelen == 5 && Ustrcmp(argv[0], "rmail") == 0) ||
1932 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/rmail", 6) == 0))
1933 {
1934 f.dot_ends = FALSE;
1935 called_as = US"-rmail";
1936 errors_sender_rc = EXIT_SUCCESS;
1937 }
1938
1939 /* If the program is called as "rsmtp" treat it as equivalent to "exim -bS";
1940 this is a smail convention. */
1941
1942 if ((namelen == 5 && Ustrcmp(argv[0], "rsmtp") == 0) ||
1943 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/rsmtp", 6) == 0))
1944 {
1945 smtp_input = smtp_batched_input = TRUE;
1946 called_as = US"-rsmtp";
1947 }
1948
1949 /* If the program is called as "runq" treat it as equivalent to "exim -q";
1950 this is a smail convention. */
1951
1952 if ((namelen == 4 && Ustrcmp(argv[0], "runq") == 0) ||
1953 (namelen > 4 && Ustrncmp(argv[0] + namelen - 5, "/runq", 5) == 0))
1954 {
1955 queue_interval = 0;
1956 receiving_message = FALSE;
1957 called_as = US"-runq";
1958 }
1959
1960 /* If the program is called as "newaliases" treat it as equivalent to
1961 "exim -bi"; this is a sendmail convention. */
1962
1963 if ((namelen == 10 && Ustrcmp(argv[0], "newaliases") == 0) ||
1964 (namelen > 10 && Ustrncmp(argv[0] + namelen - 11, "/newaliases", 11) == 0))
1965 {
1966 bi_option = TRUE;
1967 receiving_message = FALSE;
1968 called_as = US"-newaliases";
1969 }
1970
1971 /* Save the original effective uid for a couple of uses later. It should
1972 normally be root, but in some esoteric environments it may not be. */
1973
1974 original_euid = geteuid();
1975 original_egid = getegid();
1976
1977 /* Get the real uid and gid. If the caller is root, force the effective uid/gid
1978 to be the same as the real ones. This makes a difference only if Exim is setuid
1979 (or setgid) to something other than root, which could be the case in some
1980 special configurations. */
1981
1982 real_uid = getuid();
1983 real_gid = getgid();
1984
1985 if (real_uid == root_uid)
1986 {
1987 if ((rv = setgid(real_gid)))
1988 exim_fail("exim: setgid(%ld) failed: %s\n",
1989 (long int)real_gid, strerror(errno));
1990 if ((rv = setuid(real_uid)))
1991 exim_fail("exim: setuid(%ld) failed: %s\n",
1992 (long int)real_uid, strerror(errno));
1993 }
1994
1995 /* If neither the original real uid nor the original euid was root, Exim is
1996 running in an unprivileged state. */
1997
1998 unprivileged = (real_uid != root_uid && original_euid != root_uid);
1999
2000 /* For most of the args-parsing we need to use permanent pool memory */
2001 {
2002 int old_pool = store_pool;
2003 store_pool = POOL_PERM;
2004
2005 /* Scan the program's arguments. Some can be dealt with right away; others are
2006 simply recorded for checking and handling afterwards. Do a high-level switch
2007 on the second character (the one after '-'), to save some effort. */
2008
2009 for (i = 1; i < argc; i++)
2010 {
2011 BOOL badarg = FALSE;
2012 uschar * arg = argv[i];
2013 uschar * argrest;
2014 int switchchar;
2015
2016 /* An argument not starting with '-' is the start of a recipients list;
2017 break out of the options-scanning loop. */
2018
2019 if (arg[0] != '-')
2020 {
2021 recipients_arg = i;
2022 break;
2023 }
2024
2025 /* An option consisting of -- terminates the options */
2026
2027 if (Ustrcmp(arg, "--") == 0)
2028 {
2029 recipients_arg = i + 1;
2030 break;
2031 }
2032
2033 /* Handle flagged options */
2034
2035 switchchar = arg[1];
2036 argrest = arg+2;
2037
2038 /* Make all -ex options synonymous with -oex arguments, since that
2039 is assumed by various callers. Also make -qR options synonymous with -R
2040 options, as that seems to be required as well. Allow for -qqR too, and
2041 the same for -S options. */
2042
2043 if (Ustrncmp(arg+1, "oe", 2) == 0 ||
2044 Ustrncmp(arg+1, "qR", 2) == 0 ||
2045 Ustrncmp(arg+1, "qS", 2) == 0)
2046 {
2047 switchchar = arg[2];
2048 argrest++;
2049 }
2050 else if (Ustrncmp(arg+1, "qqR", 3) == 0 || Ustrncmp(arg+1, "qqS", 3) == 0)
2051 {
2052 switchchar = arg[3];
2053 argrest += 2;
2054 f.queue_2stage = TRUE;
2055 }
2056
2057 /* Make -r synonymous with -f, since it is a documented alias */
2058
2059 else if (arg[1] == 'r') switchchar = 'f';
2060
2061 /* Make -ov synonymous with -v */
2062
2063 else if (Ustrcmp(arg, "-ov") == 0)
2064 {
2065 switchchar = 'v';
2066 argrest++;
2067 }
2068
2069 /* deal with --option_aliases */
2070 else if (switchchar == '-')
2071 {
2072 if (Ustrcmp(argrest, "help") == 0)
2073 {
2074 usage_wanted = TRUE;
2075 break;
2076 }
2077 else if (Ustrcmp(argrest, "version") == 0)
2078 {
2079 switchchar = 'b';
2080 argrest = US"V";
2081 }
2082 }
2083
2084 /* High-level switch on active initial letter */
2085
2086 switch(switchchar)
2087 {
2088
2089 /* sendmail uses -Ac and -Am to control which .cf file is used;
2090 we ignore them. */
2091 case 'A':
2092 if (!*argrest) { badarg = TRUE; break; }
2093 else
2094 {
2095 BOOL ignore = FALSE;
2096 switch (*argrest)
2097 {
2098 case 'c':
2099 case 'm':
2100 if (*(argrest + 1) == '\0')
2101 ignore = TRUE;
2102 break;
2103 }
2104 if (!ignore) badarg = TRUE;
2105 }
2106 break;
2107
2108 /* -Btype is a sendmail option for 7bit/8bit setting. Exim is 8-bit clean
2109 so has no need of it. */
2110
2111 case 'B':
2112 if (!*argrest) i++; /* Skip over the type */
2113 break;
2114
2115
2116 case 'b':
2117 {
2118 receiving_message = FALSE; /* Reset TRUE for -bm, -bS, -bs below */
2119
2120 switch (*argrest++)
2121 {
2122 /* -bd: Run in daemon mode, awaiting SMTP connections.
2123 -bdf: Ditto, but in the foreground.
2124 */
2125 case 'd':
2126 f.daemon_listen = TRUE;
2127 if (*argrest == 'f') f.background_daemon = FALSE;
2128 else if (*argrest) badarg = TRUE;
2129 break;
2130
2131 /* -be: Run in expansion test mode
2132 -bem: Ditto, but read a message from a file first
2133 */
2134 case 'e':
2135 expansion_test = checking = TRUE;
2136 if (*argrest == 'm')
2137 {
2138 if (++i >= argc) { badarg = TRUE; break; }
2139 expansion_test_message = argv[i];
2140 argrest++;
2141 }
2142 if (*argrest) badarg = TRUE;
2143 break;
2144
2145 /* -bF: Run system filter test */
2146 case 'F':
2147 filter_test |= checking = FTEST_SYSTEM;
2148 if (*argrest) badarg = TRUE;
2149 else if (++i < argc) filter_test_sfile = argv[i];
2150 else exim_fail("exim: file name expected after %s\n", argv[i-1]);
2151 break;
2152
2153 /* -bf: Run user filter test
2154 -bfd: Set domain for filter testing
2155 -bfl: Set local part for filter testing
2156 -bfp: Set prefix for filter testing
2157 -bfs: Set suffix for filter testing
2158 */
2159 case 'f':
2160 if (!*argrest)
2161 {
2162 filter_test |= checking = FTEST_USER;
2163 if (++i < argc) filter_test_ufile = argv[i];
2164 else exim_fail("exim: file name expected after %s\n", argv[i-1]);
2165 }
2166 else
2167 {
2168 if (++i >= argc)
2169 exim_fail("exim: string expected after %s\n", arg);
2170 if (Ustrcmp(argrest, "d") == 0) ftest_domain = exim_str_fail_toolong(argv[i], EXIM_DOMAINNAME_MAX, "-bfd");
2171 else if (Ustrcmp(argrest, "l") == 0) ftest_localpart = exim_str_fail_toolong(argv[i], EXIM_LOCALPART_MAX, "-bfl");
2172 else if (Ustrcmp(argrest, "p") == 0) ftest_prefix = exim_str_fail_toolong(argv[i], EXIM_LOCALPART_MAX, "-bfp");
2173 else if (Ustrcmp(argrest, "s") == 0) ftest_suffix = exim_str_fail_toolong(argv[i], EXIM_LOCALPART_MAX, "-bfs");
2174 else badarg = TRUE;
2175 }
2176 break;
2177
2178 /* -bh: Host checking - an IP address must follow. */
2179 case 'h':
2180 if (!*argrest || Ustrcmp(argrest, "c") == 0)
2181 {
2182 if (++i >= argc) { badarg = TRUE; break; }
2183 sender_host_address = string_copy_taint(exim_str_fail_toolong(argv[i], EXIM_IPADDR_MAX, "-bh"), TRUE);
2184 host_checking = checking = f.log_testing_mode = TRUE;
2185 f.host_checking_callout = *argrest == 'c';
2186 message_logs = FALSE;
2187 }
2188 else badarg = TRUE;
2189 break;
2190
2191 /* -bi: This option is used by sendmail to initialize *the* alias file,
2192 though it has the -oA option to specify a different file. Exim has no
2193 concept of *the* alias file, but since Sun's YP make script calls
2194 sendmail this way, some support must be provided. */
2195 case 'i':
2196 if (!*argrest) bi_option = TRUE;
2197 else badarg = TRUE;
2198 break;
2199
2200 /* -bI: provide information, of the type to follow after a colon.
2201 This is an Exim flag. */
2202 case 'I':
2203 if (Ustrlen(argrest) >= 1 && *argrest == ':')
2204 {
2205 uschar *p = argrest+1;
2206 info_flag = CMDINFO_HELP;
2207 if (Ustrlen(p))
2208 if (strcmpic(p, CUS"sieve") == 0)
2209 {
2210 info_flag = CMDINFO_SIEVE;
2211 info_stdout = TRUE;
2212 }
2213 else if (strcmpic(p, CUS"dscp") == 0)
2214 {
2215 info_flag = CMDINFO_DSCP;
2216 info_stdout = TRUE;
2217 }
2218 else if (strcmpic(p, CUS"help") == 0)
2219 info_stdout = TRUE;
2220 }
2221 else badarg = TRUE;
2222 break;
2223
2224 /* -bm: Accept and deliver message - the default option. Reinstate
2225 receiving_message, which got turned off for all -b options.
2226 -bmalware: test the filename given for malware */
2227 case 'm':
2228 if (!*argrest) receiving_message = TRUE;
2229 else if (Ustrcmp(argrest, "alware") == 0)
2230 {
2231 if (++i >= argc) { badarg = TRUE; break; }
2232 checking = TRUE;
2233 malware_test_file = argv[i];
2234 }
2235 else badarg = TRUE;
2236 break;
2237
2238 /* -bnq: For locally originating messages, do not qualify unqualified
2239 addresses. In the envelope, this causes errors; in header lines they
2240 just get left. */
2241 case 'n':
2242 if (Ustrcmp(argrest, "q") == 0)
2243 {
2244 f.allow_unqualified_sender = FALSE;
2245 f.allow_unqualified_recipient = FALSE;
2246 }
2247 else badarg = TRUE;
2248 break;
2249
2250 /* -bpxx: List the contents of the mail queue, in various forms. If
2251 the option is -bpc, just a queue count is needed. Otherwise, if the
2252 first letter after p is r, then order is random. */
2253 case 'p':
2254 if (*argrest == 'c')
2255 {
2256 count_queue = TRUE;
2257 if (*++argrest) badarg = TRUE;
2258 break;
2259 }
2260
2261 if (*argrest == 'r')
2262 {
2263 list_queue_option = 8;
2264 argrest++;
2265 }
2266 else list_queue_option = 0;
2267
2268 list_queue = TRUE;
2269
2270 /* -bp: List the contents of the mail queue, top-level only */
2271
2272 if (!*argrest) {}
2273
2274 /* -bpu: List the contents of the mail queue, top-level undelivered */
2275
2276 else if (Ustrcmp(argrest, "u") == 0) list_queue_option += 1;
2277
2278 /* -bpa: List the contents of the mail queue, including all delivered */
2279
2280 else if (Ustrcmp(argrest, "a") == 0) list_queue_option += 2;
2281
2282 /* Unknown after -bp[r] */
2283
2284 else badarg = TRUE;
2285 break;
2286
2287
2288 /* -bP: List the configuration variables given as the address list.
2289 Force -v, so configuration errors get displayed. */
2290 case 'P':
2291
2292 /* -bP config: we need to setup here, because later,
2293 when list_options is checked, the config is read already */
2294 if (*argrest)
2295 badarg = TRUE;
2296 else if (argv[i+1] && Ustrcmp(argv[i+1], "config") == 0)
2297 {
2298 list_config = TRUE;
2299 readconf_save_config(version_string);
2300 }
2301 else
2302 {
2303 list_options = TRUE;
2304 debug_selector |= D_v;
2305 debug_file = stderr;
2306 }
2307 break;
2308
2309 /* -brt: Test retry configuration lookup */
2310 case 'r':
2311 if (Ustrcmp(argrest, "t") == 0)
2312 {
2313 checking = TRUE;
2314 test_retry_arg = i + 1;
2315 goto END_ARG;
2316 }
2317
2318 /* -brw: Test rewrite configuration */
2319
2320 else if (Ustrcmp(argrest, "w") == 0)
2321 {
2322 checking = TRUE;
2323 test_rewrite_arg = i + 1;
2324 goto END_ARG;
2325 }
2326 else badarg = TRUE;
2327 break;
2328
2329 /* -bS: Read SMTP commands on standard input, but produce no replies -
2330 all errors are reported by sending messages. */
2331 case 'S':
2332 if (!*argrest)
2333 smtp_input = smtp_batched_input = receiving_message = TRUE;
2334 else badarg = TRUE;
2335 break;
2336
2337 /* -bs: Read SMTP commands on standard input and produce SMTP replies
2338 on standard output. */
2339 case 's':
2340 if (!*argrest) smtp_input = receiving_message = TRUE;
2341 else badarg = TRUE;
2342 break;
2343
2344 /* -bt: address testing mode */
2345 case 't':
2346 if (!*argrest)
2347 f.address_test_mode = checking = f.log_testing_mode = TRUE;
2348 else badarg = TRUE;
2349 break;
2350
2351 /* -bv: verify addresses */
2352 case 'v':
2353 if (!*argrest)
2354 verify_address_mode = checking = f.log_testing_mode = TRUE;
2355
2356 /* -bvs: verify sender addresses */
2357
2358 else if (Ustrcmp(argrest, "s") == 0)
2359 {
2360 verify_address_mode = checking = f.log_testing_mode = TRUE;
2361 verify_as_sender = TRUE;
2362 }
2363 else badarg = TRUE;
2364 break;
2365
2366 /* -bV: Print version string and support details */
2367 case 'V':
2368 if (!*argrest)
2369 {
2370 printf("Exim version %s #%s built %s\n", version_string,
2371 version_cnumber, version_date);
2372 printf("%s\n", CS version_copyright);
2373 version_printed = TRUE;
2374 show_whats_supported(stdout);
2375 f.log_testing_mode = TRUE;
2376 }
2377 else badarg = TRUE;
2378 break;
2379
2380 /* -bw: inetd wait mode, accept a listening socket as stdin */
2381 case 'w':
2382 f.inetd_wait_mode = TRUE;
2383 f.background_daemon = FALSE;
2384 f.daemon_listen = TRUE;
2385 if (*argrest)
2386 if ((inetd_wait_timeout = readconf_readtime(argrest, 0, FALSE)) <= 0)
2387 exim_fail("exim: bad time value %s: abandoned\n", argv[i]);
2388 break;
2389
2390 default:
2391 badarg = TRUE;
2392 break;
2393 }
2394 break;
2395 }
2396
2397
2398 /* -C: change configuration file list; ignore if it isn't really
2399 a change! Enforce a prefix check if required. */
2400
2401 case 'C':
2402 if (!*argrest)
2403 if (++i < argc) argrest = argv[i]; else { badarg = TRUE; break; }
2404 if (Ustrcmp(config_main_filelist, argrest) != 0)
2405 {
2406 #ifdef ALT_CONFIG_PREFIX
2407 int sep = 0;
2408 int len = Ustrlen(ALT_CONFIG_PREFIX);
2409 const uschar *list = argrest;
2410 uschar *filename;
2411 /* The argv is untainted, so big_buffer (also untainted) is ok to use */
2412 while((filename = string_nextinlist(&list, &sep, big_buffer,
2413 big_buffer_size)))
2414 if ( ( Ustrlen(filename) < len
2415 || Ustrncmp(filename, ALT_CONFIG_PREFIX, len) != 0
2416 || Ustrstr(filename, "/../") != NULL
2417 )
2418 && (Ustrcmp(filename, "/dev/null") != 0 || real_uid != root_uid)
2419 )
2420 exim_fail("-C Permission denied\n");
2421 #endif
2422 if (real_uid != root_uid)
2423 {
2424 #ifdef TRUSTED_CONFIG_LIST
2425
2426 if (real_uid != exim_uid
2427 #ifdef CONFIGURE_OWNER
2428 && real_uid != config_uid
2429 #endif
2430 )
2431 f.trusted_config = FALSE;
2432 else
2433 {
2434 FILE *trust_list = Ufopen(TRUSTED_CONFIG_LIST, "rb");
2435 if (trust_list)
2436 {
2437 struct stat statbuf;
2438
2439 if (fstat(fileno(trust_list), &statbuf) != 0 ||
2440 (statbuf.st_uid != root_uid /* owner not root */
2441 #ifdef CONFIGURE_OWNER
2442 && statbuf.st_uid != config_uid /* owner not the special one */
2443 #endif
2444 ) || /* or */
2445 (statbuf.st_gid != root_gid /* group not root */
2446 #ifdef CONFIGURE_GROUP
2447 && statbuf.st_gid != config_gid /* group not the special one */
2448 #endif
2449 && (statbuf.st_mode & 020) != 0 /* group writeable */
2450 ) || /* or */
2451 (statbuf.st_mode & 2) != 0) /* world writeable */
2452 {
2453 f.trusted_config = FALSE;
2454 fclose(trust_list);
2455 }
2456 else
2457 {
2458 /* Well, the trust list at least is up to scratch... */
2459 rmark reset_point;
2460 uschar *trusted_configs[32];
2461 int nr_configs = 0;
2462 int i = 0;
2463 int old_pool = store_pool;
2464 store_pool = POOL_MAIN;
2465
2466 reset_point = store_mark();
2467 while (Ufgets(big_buffer, big_buffer_size, trust_list))
2468 {
2469 uschar *start = big_buffer, *nl;
2470 while (*start && isspace(*start))
2471 start++;
2472 if (*start != '/')
2473 continue;
2474 nl = Ustrchr(start, '\n');
2475 if (nl)
2476 *nl = 0;
2477 trusted_configs[nr_configs++] = string_copy(start);
2478 if (nr_configs == nelem(trusted_configs))
2479 break;
2480 }
2481 fclose(trust_list);
2482
2483 if (nr_configs)
2484 {
2485 int sep = 0;
2486 const uschar *list = argrest;
2487 uschar *filename;
2488 while (f.trusted_config && (filename = string_nextinlist(&list,
2489 &sep, big_buffer, big_buffer_size)))
2490 {
2491 for (i=0; i < nr_configs; i++)
2492 if (Ustrcmp(filename, trusted_configs[i]) == 0)
2493 break;
2494 if (i == nr_configs)
2495 {
2496 f.trusted_config = FALSE;
2497 break;
2498 }
2499 }
2500 }
2501 else /* No valid prefixes found in trust_list file. */
2502 f.trusted_config = FALSE;
2503 store_reset(reset_point);
2504 store_pool = old_pool;
2505 }
2506 }
2507 else /* Could not open trust_list file. */
2508 f.trusted_config = FALSE;
2509 }
2510 #else
2511 /* Not root; don't trust config */
2512 f.trusted_config = FALSE;
2513 #endif
2514 }
2515
2516 config_main_filelist = argrest;
2517 f.config_changed = TRUE;
2518 }
2519 break;
2520
2521
2522 /* -D: set up a macro definition */
2523
2524 case 'D':
2525 #ifdef DISABLE_D_OPTION
2526 exim_fail("exim: -D is not available in this Exim binary\n");
2527 #else
2528 {
2529 int ptr = 0;
2530 macro_item *m;
2531 uschar name[24];
2532 uschar *s = argrest;
2533
2534 opt_D_used = TRUE;
2535 while (isspace(*s)) s++;
2536
2537 if (*s < 'A' || *s > 'Z')
2538 exim_fail("exim: macro name set by -D must start with "
2539 "an upper case letter\n");
2540
2541 while (isalnum(*s) || *s == '_')
2542 {
2543 if (ptr < sizeof(name)-1) name[ptr++] = *s;
2544 s++;
2545 }
2546 name[ptr] = 0;
2547 if (ptr == 0) { badarg = TRUE; break; }
2548 while (isspace(*s)) s++;
2549 if (*s != 0)
2550 {
2551 if (*s++ != '=') { badarg = TRUE; break; }
2552 while (isspace(*s)) s++;
2553 }
2554
2555 for (m = macros_user; m; m = m->next)
2556 if (Ustrcmp(m->name, name) == 0)
2557 exim_fail("exim: duplicated -D in command line\n");
2558
2559 m = macro_create(name, s, TRUE);
2560
2561 if (clmacro_count >= MAX_CLMACROS)
2562 exim_fail("exim: too many -D options on command line\n");
2563 clmacros[clmacro_count++] =
2564 string_sprintf("-D%s=%s", m->name, m->replacement);
2565 }
2566 #endif
2567 break;
2568
2569 /* -d: Set debug level (see also -v below) or set the drop_cr option.
2570 The latter is now a no-op, retained for compatibility only. If -dd is used,
2571 debugging subprocesses of the daemon is disabled. */
2572
2573 case 'd':
2574 if (Ustrcmp(argrest, "ropcr") == 0)
2575 {
2576 /* drop_cr = TRUE; */
2577 }
2578
2579 /* Use an intermediate variable so that we don't set debugging while
2580 decoding the debugging bits. */
2581
2582 else
2583 {
2584 unsigned int selector = D_default;
2585 debug_selector = 0;
2586 debug_file = NULL;
2587 if (*argrest == 'd')
2588 {
2589 f.debug_daemon = TRUE;
2590 argrest++;
2591 }
2592 if (*argrest)
2593 decode_bits(&selector, 1, debug_notall, argrest,
2594 debug_options, debug_options_count, US"debug", 0);
2595 debug_selector = selector;
2596 }
2597 break;
2598
2599
2600 /* -E: This is a local error message. This option is not intended for
2601 external use at all, but is not restricted to trusted callers because it
2602 does no harm (just suppresses certain error messages) and if Exim is run
2603 not setuid root it won't always be trusted when it generates error
2604 messages using this option. If there is a message id following -E, point
2605 message_reference at it, for logging. */
2606
2607 case 'E':
2608 f.local_error_message = TRUE;
2609 if (mac_ismsgid(argrest)) message_reference = argrest;
2610 break;
2611
2612
2613 /* -ex: The vacation program calls sendmail with the undocumented "-eq"
2614 option, so it looks as if historically the -oex options are also callable
2615 without the leading -o. So we have to accept them. Before the switch,
2616 anything starting -oe has been converted to -e. Exim does not support all
2617 of the sendmail error options. */
2618
2619 case 'e':
2620 if (Ustrcmp(argrest, "e") == 0)
2621 {
2622 arg_error_handling = ERRORS_SENDER;
2623 errors_sender_rc = EXIT_SUCCESS;
2624 }
2625 else if (Ustrcmp(argrest, "m") == 0) arg_error_handling = ERRORS_SENDER;
2626 else if (Ustrcmp(argrest, "p") == 0) arg_error_handling = ERRORS_STDERR;
2627 else if (Ustrcmp(argrest, "q") == 0) arg_error_handling = ERRORS_STDERR;
2628 else if (Ustrcmp(argrest, "w") == 0) arg_error_handling = ERRORS_SENDER;
2629 else badarg = TRUE;
2630 break;
2631
2632
2633 /* -F: Set sender's full name, used instead of the gecos entry from
2634 the password file. Since users can usually alter their gecos entries,
2635 there's no security involved in using this instead. The data can follow
2636 the -F or be in the next argument. */
2637
2638 case 'F':
2639 if (!*argrest)
2640 if (++i < argc) argrest = argv[i]; else { badarg = TRUE; break; }
2641 originator_name = string_copy_taint(exim_str_fail_toolong(argrest, EXIM_HUMANNAME_MAX, "-F"), TRUE);
2642 f.sender_name_forced = TRUE;
2643 break;
2644
2645
2646 /* -f: Set sender's address - this value is only actually used if Exim is
2647 run by a trusted user, or if untrusted_set_sender is set and matches the
2648 address, except that the null address can always be set by any user. The
2649 test for this happens later, when the value given here is ignored when not
2650 permitted. For an untrusted user, the actual sender is still put in Sender:
2651 if it doesn't match the From: header (unless no_local_from_check is set).
2652 The data can follow the -f or be in the next argument. The -r switch is an
2653 obsolete form of -f but since there appear to be programs out there that
2654 use anything that sendmail has ever supported, better accept it - the
2655 synonymizing is done before the switch above.
2656
2657 At this stage, we must allow domain literal addresses, because we don't
2658 know what the setting of allow_domain_literals is yet. Ditto for trailing
2659 dots and strip_trailing_dot. */
2660
2661 case 'f':
2662 {
2663 int dummy_start, dummy_end;
2664 uschar *errmess;
2665 if (!*argrest)
2666 if (i+1 < argc) argrest = argv[++i]; else { badarg = TRUE; break; }
2667 (void) exim_str_fail_toolong(argrest, EXIM_DISPLAYMAIL_MAX, "-f");
2668 if (!*argrest)
2669 *(sender_address = store_get(1, FALSE)) = '\0'; /* Ensure writeable memory */
2670 else
2671 {
2672 uschar * temp = argrest + Ustrlen(argrest) - 1;
2673 while (temp >= argrest && isspace(*temp)) temp--;
2674 if (temp >= argrest && *temp == '.') f_end_dot = TRUE;
2675 allow_domain_literals = TRUE;
2676 strip_trailing_dot = TRUE;
2677 #ifdef SUPPORT_I18N
2678 allow_utf8_domains = TRUE;
2679 #endif
2680 if (!(sender_address = parse_extract_address(argrest, &errmess,
2681 &dummy_start, &dummy_end, &sender_address_domain, TRUE)))
2682 exim_fail("exim: bad -f address \"%s\": %s\n", argrest, errmess);
2683
2684 sender_address = string_copy_taint(sender_address, TRUE);
2685 #ifdef SUPPORT_I18N
2686 message_smtputf8 = string_is_utf8(sender_address);
2687 allow_utf8_domains = FALSE;
2688 #endif
2689 allow_domain_literals = FALSE;
2690 strip_trailing_dot = FALSE;
2691 }
2692 f.sender_address_forced = TRUE;
2693 }
2694 break;
2695
2696 /* -G: sendmail invocation to specify that it's a gateway submission and
2697 sendmail may complain about problems instead of fixing them.
2698 We make it equivalent to an ACL "control = suppress_local_fixups" and do
2699 not at this time complain about problems. */
2700
2701 case 'G':
2702 flag_G = TRUE;
2703 break;
2704
2705 /* -h: Set the hop count for an incoming message. Exim does not currently
2706 support this; it always computes it by counting the Received: headers.
2707 To put it in will require a change to the spool header file format. */
2708
2709 case 'h':
2710 if (!*argrest)
2711 if (++i < argc) argrest = argv[i]; else { badarg = TRUE; break; }
2712 if (!isdigit(*argrest)) badarg = TRUE;
2713 break;
2714
2715
2716 /* -i: Set flag so dot doesn't end non-SMTP input (same as -oi, seems
2717 not to be documented for sendmail but mailx (at least) uses it) */
2718
2719 case 'i':
2720 if (!*argrest) f.dot_ends = FALSE; else badarg = TRUE;
2721 break;
2722
2723
2724 /* -L: set the identifier used for syslog; equivalent to setting
2725 syslog_processname in the config file, but needs to be an admin option. */
2726
2727 case 'L':
2728 if (!*argrest)
2729 if (++i < argc) argrest = argv[i]; else { badarg = TRUE; break; }
2730 if ((sz = Ustrlen(argrest)) > 32)
2731 exim_fail("exim: the -L syslog name is too long: \"%s\"\n", argrest);
2732 if (sz < 1)
2733 exim_fail("exim: the -L syslog name is too short\n");
2734 cmdline_syslog_name = string_copy_taint(argrest, TRUE);
2735 break;
2736
2737 case 'M':
2738 receiving_message = FALSE;
2739
2740 /* -MC: continue delivery of another message via an existing open
2741 file descriptor. This option is used for an internal call by the
2742 smtp transport when there is a pending message waiting to go to an
2743 address to which it has got a connection. Five subsequent arguments are
2744 required: transport name, host name, IP address, sequence number, and
2745 message_id. Transports may decline to create new processes if the sequence
2746 number gets too big. The channel is stdin. This (-MC) must be the last
2747 argument. There's a subsequent check that the real-uid is privileged.
2748
2749 If we are running in the test harness. delay for a bit, to let the process
2750 that set this one up complete. This makes for repeatability of the logging,
2751 etc. output. */
2752
2753 if (Ustrcmp(argrest, "C") == 0)
2754 {
2755 union sockaddr_46 interface_sock;
2756 EXIM_SOCKLEN_T size = sizeof(interface_sock);
2757
2758 if (argc != i + 6)
2759 exim_fail("exim: too many or too few arguments after -MC\n");
2760
2761 if (msg_action_arg >= 0)
2762 exim_fail("exim: incompatible arguments\n");
2763
2764 continue_transport = string_copy_taint(exim_str_fail_toolong(argv[++i], EXIM_DRIVERNAME_MAX, "-C internal transport"), TRUE);
2765 continue_hostname = string_copy_taint(exim_str_fail_toolong(argv[++i], EXIM_HOSTNAME_MAX, "-C internal hostname"), TRUE);
2766 continue_host_address = string_copy_taint(exim_str_fail_toolong(argv[++i], EXIM_IPADDR_MAX, "-C internal hostaddr"), TRUE);
2767 continue_sequence = Uatoi(argv[++i]);
2768 msg_action = MSG_DELIVER;
2769 msg_action_arg = ++i;
2770 forced_delivery = TRUE;
2771 queue_run_pid = passed_qr_pid;
2772 queue_run_pipe = passed_qr_pipe;
2773
2774 if (!mac_ismsgid(argv[i]))
2775 exim_fail("exim: malformed message id %s after -MC option\n",
2776 argv[i]);
2777
2778 /* Set up $sending_ip_address and $sending_port, unless proxied */
2779
2780 if (!continue_proxy_cipher)
2781 if (getsockname(fileno(stdin), (struct sockaddr *)(&interface_sock),
2782 &size) == 0)
2783 sending_ip_address = host_ntoa(-1, &interface_sock, NULL,
2784 &sending_port);
2785 else
2786 exim_fail("exim: getsockname() failed after -MC option: %s\n",
2787 strerror(errno));
2788
2789 testharness_pause_ms(500);
2790 break;
2791 }
2792
2793 else if (*argrest == 'C' && argrest[1] && !argrest[2])
2794 {
2795 switch(argrest[1])
2796 {
2797 /* -MCA: set the smtp_authenticated flag; this is useful only when it
2798 precedes -MC (see above). The flag indicates that the host to which
2799 Exim is connected has accepted an AUTH sequence. */
2800
2801 case 'A': f.smtp_authenticated = TRUE; break;
2802
2803 /* -MCD: set the smtp_use_dsn flag; this indicates that the host
2804 that exim is connected to supports the esmtp extension DSN */
2805
2806 case 'D': smtp_peer_options |= OPTION_DSN; break;
2807
2808 /* -MCd: for debug, set a process-purpose string */
2809
2810 case 'd': if (++i < argc)
2811 process_purpose = string_copy_taint(exim_str_fail_toolong(argv[i], EXIM_DRIVERNAME_MAX, "-MCd"), TRUE);
2812 else badarg = TRUE;
2813 break;
2814
2815 /* -MCG: set the queue name, to a non-default value. Arguably, anything
2816 from the commandline should be tainted - but we will need an untainted
2817 value for the spoolfile when doing a -odi delivery process. */
2818
2819 case 'G': if (++i < argc) queue_name = string_copy_taint(exim_str_fail_toolong(argv[i], EXIM_DRIVERNAME_MAX, "-MCG"), FALSE);
2820 else badarg = TRUE;
2821 break;
2822
2823 /* -MCK: the peer offered CHUNKING. Must precede -MC */
2824
2825 case 'K': smtp_peer_options |= OPTION_CHUNKING; break;
2826
2827 #ifdef EXPERIMENTAL_ESMTP_LIMITS
2828 /* -MCL: peer used LIMITS RCPTMAX and/or RCPTDOMAINMAX */
2829 case 'L': if (++i < argc) continue_limit_mail = Uatoi(argv[i]);
2830 else badarg = TRUE;
2831 if (++i < argc) continue_limit_rcpt = Uatoi(argv[i]);
2832 else badarg = TRUE;
2833 if (++i < argc) continue_limit_rcptdom = Uatoi(argv[i]);
2834 else badarg = TRUE;
2835 break;
2836 #endif
2837
2838 /* -MCP: set the smtp_use_pipelining flag; this is useful only when
2839 it preceded -MC (see above) */
2840
2841 case 'P': smtp_peer_options |= OPTION_PIPE; break;
2842
2843 #ifdef SUPPORT_SOCKS
2844 /* -MCp: Socks proxy in use; nearside IP, port, external IP, port */
2845 case 'p': proxy_session = TRUE;
2846 if (++i < argc)
2847 {
2848 proxy_local_address = string_copy_taint(argv[i], TRUE);
2849 if (++i < argc)
2850 {
2851 proxy_local_port = Uatoi(argv[i]);
2852 if (++i < argc)
2853 {
2854 proxy_external_address = string_copy_taint(argv[i], TRUE);
2855 if (++i < argc)
2856 {
2857 proxy_external_port = Uatoi(argv[i]);
2858 break;
2859 } } } }
2860 badarg = TRUE;
2861 break;
2862 #endif
2863 /* -MCQ: pass on the pid of the queue-running process that started
2864 this chain of deliveries and the fd of its synchronizing pipe; this
2865 is useful only when it precedes -MC (see above) */
2866
2867 case 'Q': if (++i < argc) passed_qr_pid = (pid_t)(Uatol(argv[i]));
2868 else badarg = TRUE;
2869 if (++i < argc) passed_qr_pipe = (int)(Uatol(argv[i]));
2870 else badarg = TRUE;
2871 break;
2872
2873 /* -MCq: do a quota check on the given recipient for the given size
2874 of message. Separate from -MC. */
2875 case 'q': rcpt_verify_quota = TRUE;
2876 if (++i < argc) message_size = Uatoi(argv[i]);
2877 else badarg = TRUE;
2878 break;
2879
2880 /* -MCS: set the smtp_use_size flag; this is useful only when it
2881 precedes -MC (see above) */
2882
2883 case 'S': smtp_peer_options |= OPTION_SIZE; break;
2884
2885 #ifndef DISABLE_TLS
2886 /* -MCs: used with -MCt; SNI was sent */
2887 /* -MCr: ditto, DANE */
2888
2889 case 'r':
2890 case 's': if (++i < argc)
2891 {
2892 continue_proxy_sni = string_copy_taint(exim_str_fail_toolong(argv[i], EXIM_HOSTNAME_MAX, "-MCr/-MCs"), TRUE);
2893 if (argrest[1] == 'r') continue_proxy_dane = TRUE;
2894 }
2895 else badarg = TRUE;
2896 break;
2897
2898 /* -MCt: similar to -MCT below but the connection is still open
2899 via a proxy process which handles the TLS context and coding.
2900 Require three arguments for the proxied local address and port,
2901 and the TLS cipher. */
2902
2903 case 't': if (++i < argc)
2904 sending_ip_address = string_copy_taint(exim_str_fail_toolong(argv[i], EXIM_IPADDR_MAX, "-MCt IP"), TRUE);
2905 else badarg = TRUE;
2906 if (++i < argc)
2907 sending_port = (int)(Uatol(argv[i]));
2908 else badarg = TRUE;
2909 if (++i < argc)
2910 continue_proxy_cipher = string_copy_taint(exim_str_fail_toolong(argv[i], EXIM_CIPHERNAME_MAX, "-MCt cipher"), TRUE);
2911 else badarg = TRUE;
2912 /*FALLTHROUGH*/
2913
2914 /* -MCT: set the tls_offered flag; this is useful only when it
2915 precedes -MC (see above). The flag indicates that the host to which
2916 Exim is connected has offered TLS support. */
2917
2918 case 'T': smtp_peer_options |= OPTION_TLS; break;
2919 #endif
2920
2921 default: badarg = TRUE; break;
2922 }
2923 break;
2924 }
2925
2926 /* -M[x]: various operations on the following list of message ids:
2927 -M deliver the messages, ignoring next retry times and thawing
2928 -Mc deliver the messages, checking next retry times, no thawing
2929 -Mf freeze the messages
2930 -Mg give up on the messages
2931 -Mt thaw the messages
2932 -Mrm remove the messages
2933 In the above cases, this must be the last option. There are also the
2934 following options which are followed by a single message id, and which
2935 act on that message. Some of them use the "recipient" addresses as well.
2936 -Mar add recipient(s)
2937 -MG move to a different queue
2938 -Mmad mark all recipients delivered
2939 -Mmd mark recipients(s) delivered
2940 -Mes edit sender
2941 -Mset load a message for use with -be
2942 -Mvb show body
2943 -Mvc show copy (of whole message, in RFC 2822 format)
2944 -Mvh show header
2945 -Mvl show log
2946 */
2947
2948 else if (!*argrest)
2949 {
2950 msg_action = MSG_DELIVER;
2951 forced_delivery = f.deliver_force_thaw = TRUE;
2952 }
2953 else if (Ustrcmp(argrest, "ar") == 0)
2954 {
2955 msg_action = MSG_ADD_RECIPIENT;
2956 one_msg_action = TRUE;
2957 }
2958 else if (Ustrcmp(argrest, "c") == 0) msg_action = MSG_DELIVER;
2959 else if (Ustrcmp(argrest, "es") == 0)
2960 {
2961 msg_action = MSG_EDIT_SENDER;
2962 one_msg_action = TRUE;
2963 }
2964 else if (Ustrcmp(argrest, "f") == 0) msg_action = MSG_FREEZE;
2965 else if (Ustrcmp(argrest, "g") == 0)
2966 {
2967 msg_action = MSG_DELIVER;
2968 deliver_give_up = TRUE;
2969 }
2970 else if (Ustrcmp(argrest, "G") == 0)
2971 {
2972 msg_action = MSG_SETQUEUE;
2973 queue_name_dest = string_copy_taint(exim_str_fail_toolong(argv[++i], EXIM_DRIVERNAME_MAX, "-MG"), TRUE);
2974 }
2975 else if (Ustrcmp(argrest, "mad") == 0)
2976 {
2977 msg_action = MSG_MARK_ALL_DELIVERED;
2978 }
2979 else if (Ustrcmp(argrest, "md") == 0)
2980 {
2981 msg_action = MSG_MARK_DELIVERED;
2982 one_msg_action = TRUE;
2983 }
2984 else if (Ustrcmp(argrest, "rm") == 0) msg_action = MSG_REMOVE;
2985 else if (Ustrcmp(argrest, "set") == 0)
2986 {
2987 msg_action = MSG_LOAD;
2988 one_msg_action = TRUE;
2989 }
2990 else if (Ustrcmp(argrest, "t") == 0) msg_action = MSG_THAW;
2991 else if (Ustrcmp(argrest, "vb") == 0)
2992 {
2993 msg_action = MSG_SHOW_BODY;
2994 one_msg_action = TRUE;
2995 }
2996 else if (Ustrcmp(argrest, "vc") == 0)
2997 {
2998 msg_action = MSG_SHOW_COPY;
2999 one_msg_action = TRUE;
3000 }
3001 else if (Ustrcmp(argrest, "vh") == 0)
3002 {
3003 msg_action = MSG_SHOW_HEADER;
3004 one_msg_action = TRUE;
3005 }
3006 else if (Ustrcmp(argrest, "vl") == 0)
3007 {
3008 msg_action = MSG_SHOW_LOG;
3009 one_msg_action = TRUE;
3010 }
3011 else { badarg = TRUE; break; }
3012
3013 /* All the -Mxx options require at least one message id. */
3014
3015 msg_action_arg = i + 1;
3016 if (msg_action_arg >= argc)
3017 exim_fail("exim: no message ids given after %s option\n", arg);
3018
3019 /* Some require only message ids to follow */
3020
3021 if (!one_msg_action)
3022 {
3023 for (int j = msg_action_arg; j < argc; j++) if (!mac_ismsgid(argv[j]))
3024 exim_fail("exim: malformed message id %s after %s option\n",
3025 argv[j], arg);
3026 goto END_ARG; /* Remaining args are ids */
3027 }
3028
3029 /* Others require only one message id, possibly followed by addresses,
3030 which will be handled as normal arguments. */
3031
3032 else
3033 {
3034 if (!mac_ismsgid(argv[msg_action_arg]))
3035 exim_fail("exim: malformed message id %s after %s option\n",
3036 argv[msg_action_arg], arg);
3037 i++;
3038 }
3039 break;
3040
3041
3042 /* Some programs seem to call the -om option without the leading o;
3043 for sendmail it askes for "me too". Exim always does this. */
3044
3045 case 'm':
3046 if (*argrest) badarg = TRUE;
3047 break;
3048
3049
3050 /* -N: don't do delivery - a debugging option that stops transports doing
3051 their thing. It implies debugging at the D_v level. */
3052
3053 case 'N':
3054 if (!*argrest)
3055 {
3056 f.dont_deliver = TRUE;
3057 debug_selector |= D_v;
3058 debug_file = stderr;
3059 }
3060 else badarg = TRUE;
3061 break;
3062
3063
3064 /* -n: This means "don't alias" in sendmail, apparently.
3065 For normal invocations, it has no effect.
3066 It may affect some other options. */
3067
3068 case 'n':
3069 flag_n = TRUE;
3070 break;
3071
3072 /* -O: Just ignore it. In sendmail, apparently -O option=value means set
3073 option to the specified value. This form uses long names. We need to handle
3074 -O option=value and -Ooption=value. */
3075
3076 case 'O':
3077 if (!*argrest)
3078 if (++i >= argc)
3079 exim_fail("exim: string expected after -O\n");
3080 break;
3081
3082 case 'o':
3083 switch (*argrest++)
3084 {
3085 /* -oA: Set an argument for the bi command (sendmail's "alternate alias
3086 file" option). */
3087 case 'A':
3088 if (!*(alias_arg = argrest))
3089 if (i+1 < argc) alias_arg = argv[++i];
3090 else exim_fail("exim: string expected after -oA\n");
3091 break;
3092
3093 /* -oB: Set a connection message max value for remote deliveries */
3094 case 'B':
3095 {
3096 uschar * p = argrest;
3097 if (!*p)
3098 if (i+1 < argc && isdigit((argv[i+1][0])))
3099 p = argv[++i];
3100 else
3101 {
3102 connection_max_messages = 1;
3103 p = NULL;
3104 }
3105
3106 if (p)
3107 {
3108 if (!isdigit(*p))
3109 exim_fail("exim: number expected after -oB\n");
3110 connection_max_messages = Uatoi(p);
3111 }
3112 }
3113 break;
3114
3115 /* -odb: background delivery */
3116
3117 case 'd':
3118 if (Ustrcmp(argrest, "b") == 0)
3119 {
3120 f.synchronous_delivery = FALSE;
3121 arg_queue_only = FALSE;
3122 queue_only_set = TRUE;
3123 }
3124
3125 /* -odd: testsuite-only: add no inter-process delays */
3126
3127 else if (Ustrcmp(argrest, "d") == 0)
3128 f.testsuite_delays = FALSE;
3129
3130 /* -odf: foreground delivery (smail-compatible option); same effect as
3131 -odi: interactive (synchronous) delivery (sendmail-compatible option)
3132 */
3133
3134 else if (Ustrcmp(argrest, "f") == 0 || Ustrcmp(argrest, "i") == 0)
3135 {
3136 f.synchronous_delivery = TRUE;
3137 arg_queue_only = FALSE;
3138 queue_only_set = TRUE;
3139 }
3140
3141 /* -odq: queue only */
3142
3143 else if (Ustrcmp(argrest, "q") == 0)
3144 {
3145 f.synchronous_delivery = FALSE;
3146 arg_queue_only = TRUE;
3147 queue_only_set = TRUE;
3148 }
3149
3150 /* -odqs: queue SMTP only - do local deliveries and remote routing,
3151 but no remote delivery */
3152
3153 else if (Ustrcmp(argrest, "qs") == 0)
3154 {
3155 f.queue_smtp = TRUE;
3156 arg_queue_only = FALSE;
3157 queue_only_set = TRUE;
3158 }
3159 else badarg = TRUE;
3160 break;
3161
3162 /* -oex: Sendmail error flags. As these are also accepted without the
3163 leading -o prefix, for compatibility with vacation and other callers,
3164 they are handled with -e above. */
3165
3166 /* -oi: Set flag so dot doesn't end non-SMTP input (same as -i)
3167 -oitrue: Another sendmail syntax for the same */
3168
3169 case 'i':
3170 if (!*argrest || Ustrcmp(argrest, "true") == 0)
3171 f.dot_ends = FALSE;
3172 else badarg = TRUE;
3173 break;
3174
3175 /* -oM*: Set various characteristics for an incoming message; actually
3176 acted on for trusted callers only. */
3177
3178 case 'M':
3179 {
3180 if (i+1 >= argc)
3181 exim_fail("exim: data expected after -oM%s\n", argrest);
3182
3183 /* -oMa: Set sender host address */
3184
3185 if (Ustrcmp(argrest, "a") == 0)
3186 sender_host_address = string_copy_taint(exim_str_fail_toolong(argv[++i], EXIM_IPADDR_MAX, "-oMa"), TRUE);
3187
3188 /* -oMaa: Set authenticator name */
3189
3190 else if (Ustrcmp(argrest, "aa") == 0)
3191 sender_host_authenticated = string_copy_taint(exim_str_fail_toolong(argv[++i], EXIM_DRIVERNAME_MAX, "-oMaa"), TRUE);
3192
3193 /* -oMas: setting authenticated sender */
3194
3195 else if (Ustrcmp(argrest, "as") == 0)
3196 authenticated_sender = string_copy_taint(exim_str_fail_toolong(argv[++i], EXIM_EMAILADDR_MAX, "-oMas"), TRUE);
3197
3198 /* -oMai: setting authenticated id */
3199
3200 else if (Ustrcmp(argrest, "ai") == 0)
3201 authenticated_id = string_copy_taint(exim_str_fail_toolong(argv[++i], EXIM_EMAILADDR_MAX, "-oMas"), TRUE);
3202
3203 /* -oMi: Set incoming interface address */
3204
3205 else if (Ustrcmp(argrest, "i") == 0)
3206 interface_address = string_copy_taint(exim_str_fail_toolong(argv[++i], EXIM_IPADDR_MAX, "-oMi"), TRUE);
3207
3208 /* -oMm: Message reference */
3209
3210 else if (Ustrcmp(argrest, "m") == 0)
3211 {
3212 if (!mac_ismsgid(argv[i+1]))
3213 exim_fail("-oMm must be a valid message ID\n");
3214 if (!f.trusted_config)
3215 exim_fail("-oMm must be called by a trusted user/config\n");
3216 message_reference = argv[++i];
3217 }
3218
3219 /* -oMr: Received protocol */
3220
3221 else if (Ustrcmp(argrest, "r") == 0)
3222
3223 if (received_protocol)
3224 exim_fail("received_protocol is set already\n");
3225 else
3226 received_protocol = string_copy_taint(exim_str_fail_toolong(argv[++i], EXIM_DRIVERNAME_MAX, "-oMr"), TRUE);
3227
3228 /* -oMs: Set sender host name */
3229
3230 else if (Ustrcmp(argrest, "s") == 0)
3231 sender_host_name = string_copy_taint(exim_str_fail_toolong(argv[++i], EXIM_HOSTNAME_MAX, "-oMs"), TRUE);
3232
3233 /* -oMt: Set sender ident */
3234
3235 else if (Ustrcmp(argrest, "t") == 0)
3236 {
3237 sender_ident_set = TRUE;
3238 sender_ident = string_copy_taint(exim_str_fail_toolong(argv[++i], EXIM_IDENTUSER_MAX, "-oMt"), TRUE);
3239 }
3240
3241 /* Else a bad argument */
3242
3243 else
3244 badarg = TRUE;
3245 }
3246 break;
3247
3248 /* -om: Me-too flag for aliases. Exim always does this. Some programs
3249 seem to call this as -m (undocumented), so that is also accepted (see
3250 above). */
3251 /* -oo: An ancient flag for old-style addresses which still seems to
3252 crop up in some calls (see in SCO). */
3253
3254 case 'm':
3255 case 'o':
3256 if (*argrest) badarg = TRUE;
3257 break;
3258
3259 /* -oP <name>: set pid file path for daemon
3260 -oPX: delete pid file of daemon */
3261
3262 case 'P':
3263 if (!f.running_in_test_harness && real_uid != root_uid && real_uid != exim_uid)
3264 exim_fail("exim: only uid=%d or uid=%d can use -oP and -oPX "
3265 "(uid=%d euid=%d | %d)\n",
3266 root_uid, exim_uid, getuid(), geteuid(), real_uid);
3267 if (!*argrest) override_pid_file_path = argv[++i];
3268 else if (Ustrcmp(argrest, "X") == 0) delete_pid_file();
3269 else badarg = TRUE;
3270 break;
3271
3272
3273 /* -or <n>: set timeout for non-SMTP acceptance
3274 -os <n>: set timeout for SMTP acceptance */
3275
3276 case 'r':
3277 case 's':
3278 {
3279 int * tp = argrest[-1] == 'r'
3280 ? &arg_receive_timeout : &arg_smtp_receive_timeout;
3281 if (*argrest)
3282 *tp = readconf_readtime(argrest, 0, FALSE);
3283 else if (i+1 < argc)
3284 *tp = readconf_readtime(argv[++i], 0, FALSE);
3285
3286 if (*tp < 0)
3287 exim_fail("exim: bad time value %s: abandoned\n", argv[i]);
3288 }
3289 break;
3290
3291 /* -oX <list>: Override local_interfaces and/or default daemon ports */
3292 /* Limits: Is there a real limit we want here? 1024 is very arbitrary. */
3293
3294 case 'X':
3295 if (*argrest) badarg = TRUE;
3296 else override_local_interfaces = string_copy_taint(exim_str_fail_toolong(argv[++i], 1024, "-oX"), TRUE);
3297 break;
3298
3299 /* -oY: Override creation of daemon notifier socket */
3300
3301 case 'Y':
3302 if (*argrest) badarg = TRUE;
3303 else notifier_socket = NULL;
3304 break;
3305
3306 /* Unknown -o argument */
3307
3308 default:
3309 badarg = TRUE;
3310 }
3311 break;
3312
3313
3314 /* -ps: force Perl startup; -pd force delayed Perl startup */
3315
3316 case 'p':
3317 #ifdef EXIM_PERL
3318 if (*argrest == 's' && argrest[1] == 0)
3319 {
3320 perl_start_option = 1;
3321 break;
3322 }
3323 if (*argrest == 'd' && argrest[1] == 0)
3324 {
3325 perl_start_option = -1;
3326 break;
3327 }
3328 #endif
3329
3330 /* -panythingelse is taken as the Sendmail-compatible argument -prval:sval,
3331 which sets the host protocol and host name */
3332
3333 if (!*argrest)
3334 if (i+1 < argc) argrest = argv[++i]; else { badarg = TRUE; break; }
3335
3336 if (*argrest)
3337 {
3338 uschar * hn = Ustrchr(argrest, ':');
3339
3340 if (received_protocol)
3341 exim_fail("received_protocol is set already\n");
3342
3343 if (!hn)
3344 received_protocol = string_copy_taint(exim_str_fail_toolong(argrest, EXIM_DRIVERNAME_MAX, "-p<protocol>"), TRUE);
3345 else
3346 {
3347 (void) exim_str_fail_toolong(argrest, (EXIM_DRIVERNAME_MAX+1+EXIM_HOSTNAME_MAX), "-p<protocol>:<host>");
3348 received_protocol = string_copyn_taint(argrest, hn - argrest, TRUE);
3349 sender_host_name = string_copy_taint(hn + 1, TRUE);
3350 }
3351 }
3352 break;
3353
3354
3355 case 'q':
3356 receiving_message = FALSE;
3357 if (queue_interval >= 0)
3358 exim_fail("exim: -q specified more than once\n");
3359
3360 /* -qq...: Do queue runs in a 2-stage manner */
3361
3362 if (*argrest == 'q')
3363 {
3364 f.queue_2stage = TRUE;
3365 argrest++;
3366 }
3367
3368 /* -qi...: Do only first (initial) deliveries */
3369
3370 if (*argrest == 'i')
3371 {
3372 f.queue_run_first_delivery = TRUE;
3373 argrest++;
3374 }
3375
3376 /* -qf...: Run the queue, forcing deliveries
3377 -qff..: Ditto, forcing thawing as well */
3378
3379 if (*argrest == 'f')
3380 {
3381 f.queue_run_force = TRUE;
3382 if (*++argrest == 'f')
3383 {
3384 f.deliver_force_thaw = TRUE;
3385 argrest++;
3386 }
3387 }
3388
3389 /* -q[f][f]l...: Run the queue only on local deliveries */
3390
3391 if (*argrest == 'l')
3392 {
3393 f.queue_run_local = TRUE;
3394 argrest++;
3395 }
3396
3397 /* -q[f][f][l][G<name>]... Work on the named queue */
3398
3399 if (*argrest == 'G')
3400 {
3401 int i;
3402 for (argrest++, i = 0; argrest[i] && argrest[i] != '/'; ) i++;
3403 exim_len_fail_toolong(i, EXIM_DRIVERNAME_MAX, "-q*G<name>");
3404 queue_name = string_copyn(argrest, i);
3405 argrest += i;
3406 if (*argrest == '/') argrest++;
3407 }
3408
3409 /* -q[f][f][l][G<name>]: Run the queue, optionally forced, optionally local
3410 only, optionally named, optionally starting from a given message id. */
3411
3412 if (!(list_queue || count_queue))
3413 if ( !*argrest
3414 && (i + 1 >= argc || argv[i+1][0] == '-' || mac_ismsgid(argv[i+1])))
3415 {
3416 queue_interval = 0;
3417 if (i+1 < argc && mac_ismsgid(argv[i+1]))
3418 start_queue_run_id = string_copy_taint(argv[++i], TRUE);
3419 if (i+1 < argc && mac_ismsgid(argv[i+1]))
3420 stop_queue_run_id = string_copy_taint(argv[++i], TRUE);
3421 }
3422
3423 /* -q[f][f][l][G<name>/]<n>: Run the queue at regular intervals, optionally
3424 forced, optionally local only, optionally named. */
3425
3426 else if ((queue_interval = readconf_readtime(*argrest ? argrest : argv[++i],
3427 0, FALSE)) <= 0)
3428 exim_fail("exim: bad time value %s: abandoned\n", argv[i]);
3429 break;
3430
3431
3432 case 'R': /* Synonymous with -qR... */
3433 {
3434 const uschar *tainted_selectstr;
3435
3436 receiving_message = FALSE;
3437
3438 /* -Rf: As -R (below) but force all deliveries,
3439 -Rff: Ditto, but also thaw all frozen messages,
3440 -Rr: String is regex
3441 -Rrf: Regex and force
3442 -Rrff: Regex and force and thaw
3443
3444 in all cases provided there are no further characters in this
3445 argument. */
3446
3447 if (*argrest)
3448 for (int i = 0; i < nelem(rsopts); i++)
3449 if (Ustrcmp(argrest, rsopts[i]) == 0)
3450 {
3451 if (i != 2) f.queue_run_force = TRUE;
3452 if (i >= 2) f.deliver_selectstring_regex = TRUE;
3453 if (i == 1 || i == 4) f.deliver_force_thaw = TRUE;
3454 argrest += Ustrlen(rsopts[i]);
3455 }
3456
3457 /* -R: Set string to match in addresses for forced queue run to
3458 pick out particular messages. */
3459
3460 /* Avoid attacks from people providing very long strings, and do so before
3461 we make copies. */
3462 if (*argrest)
3463 tainted_selectstr = argrest;
3464 else if (i+1 < argc)
3465 tainted_selectstr = argv[++i];
3466 else
3467 exim_fail("exim: string expected after -R\n");
3468 deliver_selectstring = string_copy_taint(exim_str_fail_toolong(tainted_selectstr, EXIM_EMAILADDR_MAX, "-R"), TRUE);
3469 }
3470 break;
3471
3472 /* -r: an obsolete synonym for -f (see above) */
3473
3474
3475 /* -S: Like -R but works on sender. */
3476
3477 case 'S': /* Synonymous with -qS... */
3478 {
3479 const uschar *tainted_selectstr;
3480
3481 receiving_message = FALSE;
3482
3483 /* -Sf: As -S (below) but force all deliveries,
3484 -Sff: Ditto, but also thaw all frozen messages,
3485 -Sr: String is regex
3486 -Srf: Regex and force
3487 -Srff: Regex and force and thaw
3488
3489 in all cases provided there are no further characters in this
3490 argument. */
3491
3492 if (*argrest)
3493 for (int i = 0; i < nelem(rsopts); i++)
3494 if (Ustrcmp(argrest, rsopts[i]) == 0)
3495 {
3496 if (i != 2) f.queue_run_force = TRUE;
3497 if (i >= 2) f.deliver_selectstring_sender_regex = TRUE;
3498 if (i == 1 || i == 4) f.deliver_force_thaw = TRUE;
3499 argrest += Ustrlen(rsopts[i]);
3500 }
3501
3502 /* -S: Set string to match in addresses for forced queue run to
3503 pick out particular messages. */
3504
3505 if (*argrest)
3506 tainted_selectstr = argrest;
3507 else if (i+1 < argc)
3508 tainted_selectstr = argv[++i];
3509 else
3510 exim_fail("exim: string expected after -S\n");
3511 deliver_selectstring_sender = string_copy_taint(exim_str_fail_toolong(tainted_selectstr, EXIM_EMAILADDR_MAX, "-S"), TRUE);
3512 }
3513 break;
3514
3515 /* -Tqt is an option that is exclusively for use by the testing suite.
3516 It is not recognized in other circumstances. It allows for the setting up
3517 of explicit "queue times" so that various warning/retry things can be
3518 tested. Otherwise variability of clock ticks etc. cause problems. */
3519
3520 case 'T':
3521 if (f.running_in_test_harness && Ustrcmp(argrest, "qt") == 0)
3522 fudged_queue_times = string_copy_taint(argv[++i], TRUE);
3523 else badarg = TRUE;
3524 break;
3525
3526
3527 /* -t: Set flag to extract recipients from body of message. */
3528
3529 case 't':
3530 if (!*argrest) extract_recipients = TRUE;
3531
3532 /* -ti: Set flag to extract recipients from body of message, and also
3533 specify that dot does not end the message. */
3534
3535 else if (Ustrcmp(argrest, "i") == 0)
3536 {
3537 extract_recipients = TRUE;
3538 f.dot_ends = FALSE;
3539 }
3540
3541 /* -tls-on-connect: don't wait for STARTTLS (for old clients) */
3542
3543 #ifndef DISABLE_TLS
3544 else if (Ustrcmp(argrest, "ls-on-connect") == 0) tls_in.on_connect = TRUE;
3545 #endif
3546
3547 else badarg = TRUE;
3548 break;
3549
3550
3551 /* -U: This means "initial user submission" in sendmail, apparently. The
3552 doc claims that in future sendmail may refuse syntactically invalid
3553 messages instead of fixing them. For the moment, we just ignore it. */
3554
3555 case 'U':
3556 break;
3557
3558
3559 /* -v: verify things - this is a very low-level debugging */
3560
3561 case 'v':
3562 if (!*argrest)
3563 {
3564 debug_selector |= D_v;
3565 debug_file = stderr;
3566 }
3567 else badarg = TRUE;
3568 break;
3569
3570
3571 /* -x: AIX uses this to indicate some fancy 8-bit character stuff:
3572
3573 The -x flag tells the sendmail command that mail from a local
3574 mail program has National Language Support (NLS) extended characters
3575 in the body of the mail item. The sendmail command can send mail with
3576 extended NLS characters across networks that normally corrupts these
3577 8-bit characters.
3578
3579 As Exim is 8-bit clean, it just ignores this flag. */
3580
3581 case 'x':
3582 if (*argrest) badarg = TRUE;
3583 break;
3584
3585 /* -X: in sendmail: takes one parameter, logfile, and sends debugging
3586 logs to that file. We swallow the parameter and otherwise ignore it. */
3587
3588 case 'X':
3589 if (!*argrest)
3590 if (++i >= argc)
3591 exim_fail("exim: string expected after -X\n");
3592 break;
3593
3594 /* -z: a line of text to log */
3595
3596 case 'z':
3597 if (!*argrest)
3598 if (++i < argc)
3599 log_oneline = string_copy_taint(exim_str_fail_toolong(argv[i], 2048, "-z logtext"), TRUE);
3600 else
3601 exim_fail("exim: file name expected after %s\n", argv[i-1]);
3602 break;
3603
3604 /* All other initial characters are errors */
3605
3606 default:
3607 badarg = TRUE;
3608 break;
3609 } /* End of high-level switch statement */
3610
3611 /* Failed to recognize the option, or syntax error */
3612
3613 if (badarg)
3614 exim_fail("exim abandoned: unknown, malformed, or incomplete "
3615 "option %s\n", arg);
3616 }
3617
3618
3619 /* If -R or -S have been specified without -q, assume a single queue run. */
3620
3621 if ( (deliver_selectstring || deliver_selectstring_sender)
3622 && queue_interval < 0)
3623 queue_interval = 0;
3624
3625
3626 END_ARG:
3627 store_pool = old_pool;
3628 }
3629
3630 /* If usage_wanted is set we call the usage function - which never returns */
3631 if (usage_wanted) exim_usage(called_as);
3632
3633 /* Arguments have been processed. Check for incompatibilities. */
3634 if ( ( (smtp_input || extract_recipients || recipients_arg < argc)
3635 && ( f.daemon_listen || queue_interval >= 0 || bi_option
3636 || test_retry_arg >= 0 || test_rewrite_arg >= 0
3637 || filter_test != FTEST_NONE
3638 || msg_action_arg > 0 && !one_msg_action
3639 ) )
3640 || ( msg_action_arg > 0
3641 && ( f.daemon_listen || queue_interval > 0 || list_options
3642 || checking && msg_action != MSG_LOAD
3643 || bi_option || test_retry_arg >= 0 || test_rewrite_arg >= 0
3644 ) )
3645 || ( (f.daemon_listen || queue_interval > 0)
3646 && ( sender_address || list_options || list_queue || checking
3647 || bi_option
3648 ) )
3649 || f.daemon_listen && queue_interval == 0
3650 || f.inetd_wait_mode && queue_interval >= 0
3651 || ( list_options
3652 && ( checking || smtp_input || extract_recipients
3653 || filter_test != FTEST_NONE || bi_option
3654 ) )
3655 || ( verify_address_mode
3656 && ( f.address_test_mode || smtp_input || extract_recipients
3657 || filter_test != FTEST_NONE || bi_option
3658 ) )
3659 || ( f.address_test_mode
3660 && ( smtp_input || extract_recipients || filter_test != FTEST_NONE
3661 || bi_option
3662 ) )
3663 || ( smtp_input
3664 && (sender_address || filter_test != FTEST_NONE || extract_recipients)
3665 )
3666 || deliver_selectstring && queue_interval < 0
3667 || msg_action == MSG_LOAD && (!expansion_test || expansion_test_message)
3668 )
3669 exim_fail("exim: incompatible command-line options or arguments\n");
3670
3671 /* If debugging is set up, set the file and the file descriptor to pass on to
3672 child processes. It should, of course, be 2 for stderr. Also, force the daemon
3673 to run in the foreground. */
3674
3675 if (debug_selector != 0)
3676 {
3677 debug_file = stderr;
3678 debug_fd = fileno(debug_file);
3679 f.background_daemon = FALSE;
3680 testharness_pause_ms(100); /* lets caller finish */
3681 if (debug_selector != D_v) /* -v only doesn't show this */
3682 {
3683 debug_printf("Exim version %s uid=%ld gid=%ld pid=%d D=%x\n",
3684 version_string, (long int)real_uid, (long int)real_gid, (int)getpid(),
3685 debug_selector);
3686 if (!version_printed)
3687 show_whats_supported(stderr);
3688 }
3689 }
3690
3691 /* When started with root privilege, ensure that the limits on the number of
3692 open files and the number of processes (where that is accessible) are
3693 sufficiently large, or are unset, in case Exim has been called from an
3694 environment where the limits are screwed down. Not all OS have the ability to
3695 change some of these limits. */
3696
3697 if (unprivileged)
3698 {
3699 DEBUG(D_any) debug_print_ids(US"Exim has no root privilege:");
3700 }
3701 else
3702 {
3703 struct rlimit rlp;
3704
3705 #ifdef RLIMIT_NOFILE
3706 if (getrlimit(RLIMIT_NOFILE, &rlp) < 0)
3707 {
3708 log_write(0, LOG_MAIN|LOG_PANIC, "getrlimit(RLIMIT_NOFILE) failed: %s",
3709 strerror(errno));
3710 rlp.rlim_cur = rlp.rlim_max = 0;
3711 }
3712
3713 /* I originally chose 1000 as a nice big number that was unlikely to
3714 be exceeded. It turns out that some older OS have a fixed upper limit of
3715 256. */
3716
3717 if (rlp.rlim_cur < 1000)
3718 {
3719 rlp.rlim_cur = rlp.rlim_max = 1000;
3720 if (setrlimit(RLIMIT_NOFILE, &rlp) < 0)
3721 {
3722 rlp.rlim_cur = rlp.rlim_max = 256;
3723 if (setrlimit(RLIMIT_NOFILE, &rlp) < 0)
3724 log_write(0, LOG_MAIN|LOG_PANIC, "setrlimit(RLIMIT_NOFILE) failed: %s",
3725 strerror(errno));
3726 }
3727 }
3728 #endif
3729
3730 #ifdef RLIMIT_NPROC
3731 if (getrlimit(RLIMIT_NPROC, &rlp) < 0)
3732 {
3733 log_write(0, LOG_MAIN|LOG_PANIC, "getrlimit(RLIMIT_NPROC) failed: %s",
3734 strerror(errno));
3735 rlp.rlim_cur = rlp.rlim_max = 0;
3736 }
3737
3738 # ifdef RLIM_INFINITY
3739 if (rlp.rlim_cur != RLIM_INFINITY && rlp.rlim_cur < 1000)
3740 {
3741 rlp.rlim_cur = rlp.rlim_max = RLIM_INFINITY;
3742 # else
3743 if (rlp.rlim_cur < 1000)
3744 {
3745 rlp.rlim_cur = rlp.rlim_max = 1000;
3746 # endif
3747 if (setrlimit(RLIMIT_NPROC, &rlp) < 0)
3748 log_write(0, LOG_MAIN|LOG_PANIC, "setrlimit(RLIMIT_NPROC) failed: %s",
3749 strerror(errno));
3750 }
3751 #endif
3752 }
3753
3754 /* Exim is normally entered as root (but some special configurations are
3755 possible that don't do this). However, it always spins off sub-processes that
3756 set their uid and gid as required for local delivery. We don't want to pass on
3757 any extra groups that root may belong to, so we want to get rid of them all at
3758 this point.
3759
3760 We need to obey setgroups() at this stage, before possibly giving up root
3761 privilege for a changed configuration file, but later on we might need to
3762 check on the additional groups for the admin user privilege - can't do that
3763 till after reading the config, which might specify the exim gid. Therefore,
3764 save the group list here first. */
3765
3766 if ((group_count = getgroups(nelem(group_list), group_list)) < 0)
3767 exim_fail("exim: getgroups() failed: %s\n", strerror(errno));
3768
3769 /* There is a fundamental difference in some BSD systems in the matter of
3770 groups. FreeBSD and BSDI are known to be different; NetBSD and OpenBSD are
3771 known not to be different. On the "different" systems there is a single group
3772 list, and the first entry in it is the current group. On all other versions of
3773 Unix there is a supplementary group list, which is in *addition* to the current
3774 group. Consequently, to get rid of all extraneous groups on a "standard" system
3775 you pass over 0 groups to setgroups(), while on a "different" system you pass
3776 over a single group - the current group, which is always the first group in the
3777 list. Calling setgroups() with zero groups on a "different" system results in
3778 an error return. The following code should cope with both types of system.
3779
3780 Unfortunately, recent MacOS, which should be a FreeBSD, "helpfully" succeeds
3781 the "setgroups() with zero groups" - and changes the egid.
3782 Thanks to that we had to stash the original_egid above, for use below
3783 in the call to exim_setugid().
3784
3785 However, if this process isn't running as root, setgroups() can't be used
3786 since you have to be root to run it, even if throwing away groups.
3787 Except, sigh, for Hurd - where you can.
3788 Not being root here happens only in some unusual configurations. */
3789
3790 if ( !unprivileged
3791 #ifndef OS_SETGROUPS_ZERO_DROPS_ALL
3792 && setgroups(0, NULL) != 0
3793 #endif
3794 && setgroups(1, group_list) != 0)
3795 exim_fail("exim: setgroups() failed: %s\n", strerror(errno));
3796
3797 /* If the configuration file name has been altered by an argument on the
3798 command line (either a new file name or a macro definition) and the caller is
3799 not root, or if this is a filter testing run, remove any setuid privilege the
3800 program has and run as the underlying user.
3801
3802 The exim user is locked out of this, which severely restricts the use of -C
3803 for some purposes.
3804
3805 Otherwise, set the real ids to the effective values (should be root unless run
3806 from inetd, which it can either be root or the exim uid, if one is configured).
3807
3808 There is a private mechanism for bypassing some of this, in order to make it
3809 possible to test lots of configurations automatically, without having either to
3810 recompile each time, or to patch in an actual configuration file name and other
3811 values (such as the path name). If running in the test harness, pretend that
3812 configuration file changes and macro definitions haven't happened. */
3813
3814 if (( /* EITHER */
3815 (!f.trusted_config || /* Config changed, or */
3816 !macros_trusted(opt_D_used)) && /* impermissible macros and */
3817 real_uid != root_uid && /* Not root, and */
3818 !f.running_in_test_harness /* Not fudged */
3819 ) || /* OR */
3820 expansion_test /* expansion testing */
3821 || /* OR */
3822 filter_test != FTEST_NONE) /* Filter testing */
3823 {
3824 setgroups(group_count, group_list);
3825 exim_setugid(real_uid, real_gid, FALSE,
3826 US"-C, -D, -be or -bf forces real uid");
3827 removed_privilege = TRUE;
3828
3829 /* In the normal case when Exim is called like this, stderr is available
3830 and should be used for any logging information because attempts to write
3831 to the log will usually fail. To arrange this, we unset really_exim. However,
3832 if no stderr is available there is no point - we might as well have a go
3833 at the log (if it fails, syslog will be written).
3834
3835 Note that if the invoker is Exim, the logs remain available. Messing with
3836 this causes unlogged successful deliveries. */
3837
3838 if (log_stderr && real_uid != exim_uid)
3839 f.really_exim = FALSE;
3840 }
3841
3842 /* Privilege is to be retained for the moment. It may be dropped later,
3843 depending on the job that this Exim process has been asked to do. For now, set
3844 the real uid to the effective so that subsequent re-execs of Exim are done by a
3845 privileged user. */
3846
3847 else
3848 exim_setugid(geteuid(), original_egid, FALSE, US"forcing real = effective");
3849
3850 /* If testing a filter, open the file(s) now, before wasting time doing other
3851 setups and reading the message. */
3852
3853 if (filter_test & FTEST_SYSTEM)
3854 if ((filter_sfd = Uopen(filter_test_sfile, O_RDONLY, 0)) < 0)
3855 exim_fail("exim: failed to open %s: %s\n", filter_test_sfile,
3856 strerror(errno));
3857
3858 if (filter_test & FTEST_USER)
3859 if ((filter_ufd = Uopen(filter_test_ufile, O_RDONLY, 0)) < 0)
3860 exim_fail("exim: failed to open %s: %s\n", filter_test_ufile,
3861 strerror(errno));
3862
3863 /* Initialise lookup_list
3864 If debugging, already called above via version reporting.
3865 In either case, we initialise the list of available lookups while running
3866 as root. All dynamically modules are loaded from a directory which is
3867 hard-coded into the binary and is code which, if not a module, would be
3868 part of Exim already. Ability to modify the content of the directory
3869 is equivalent to the ability to modify a setuid binary!
3870
3871 This needs to happen before we read the main configuration. */
3872 init_lookup_list();
3873
3874 /*XXX this excrescence could move to the testsuite standard config setup file */
3875 #ifdef SUPPORT_I18N
3876 if (f.running_in_test_harness) smtputf8_advertise_hosts = NULL;
3877 #endif
3878
3879 /* Read the main runtime configuration data; this gives up if there
3880 is a failure. It leaves the configuration file open so that the subsequent
3881 configuration data for delivery can be read if needed.
3882
3883 NOTE: immediately after opening the configuration file we change the working
3884 directory to "/"! Later we change to $spool_directory. We do it there, because
3885 during readconf_main() some expansion takes place already. */
3886
3887 /* Store the initial cwd before we change directories. Can be NULL if the
3888 dir has already been unlinked. */
3889 initial_cwd = os_getcwd(NULL, 0);
3890 if (!initial_cwd && errno)
3891 exim_fail("exim: getting initial cwd failed: %s\n", strerror(errno));
3892
3893 if (initial_cwd && (strlen(CCS initial_cwd) >= BIG_BUFFER_SIZE))
3894 exim_fail("exim: initial cwd is far too long (%d)\n", Ustrlen(CCS initial_cwd));
3895
3896 /* checking:
3897 -be[m] expansion test -
3898 -b[fF] filter test new
3899 -bh[c] host test -
3900 -bmalware malware_test_file new
3901 -brt retry test new
3902 -brw rewrite test new
3903 -bt address test -
3904 -bv[s] address verify -
3905 list_options:
3906 -bP <option> (except -bP config, which sets list_config)
3907
3908 If any of these options is set, we suppress warnings about configuration
3909 issues (currently about tls_advertise_hosts and keep_environment not being
3910 defined) */
3911
3912 {
3913 int old_pool = store_pool;
3914 #ifdef MEASURE_TIMING
3915 struct timeval t0, diff;
3916 (void)gettimeofday(&t0, NULL);
3917 #endif
3918
3919 store_pool = POOL_CONFIG;
3920 readconf_main(checking || list_options);
3921 store_pool = old_pool;
3922
3923 #ifdef MEASURE_TIMING
3924 report_time_since(&t0, US"readconf_main (delta)");
3925 #endif
3926 }
3927
3928 /* Now in directory "/" */
3929
3930 if (cleanup_environment() == FALSE)
3931 log_write(0, LOG_PANIC_DIE, "Can't cleanup environment");
3932
3933
3934 /* If an action on specific messages is requested, or if a daemon or queue
3935 runner is being started, we need to know if Exim was called by an admin user.
3936 This is the case if the real user is root or exim, or if the real group is
3937 exim, or if one of the supplementary groups is exim or a group listed in
3938 admin_groups. We don't fail all message actions immediately if not admin_user,
3939 since some actions can be performed by non-admin users. Instead, set admin_user
3940 for later interrogation. */
3941
3942 if (real_uid == root_uid || real_uid == exim_uid || real_gid == exim_gid)
3943 f.admin_user = TRUE;
3944 else
3945 for (int i = 0; i < group_count && !f.admin_user; i++)
3946 if (group_list[i] == exim_gid)
3947 f.admin_user = TRUE;
3948 else if (admin_groups)
3949 for (int j = 1; j <= (int)admin_groups[0] && !f.admin_user; j++)
3950 if (admin_groups[j] == group_list[i])
3951 f.admin_user = TRUE;
3952
3953 /* Another group of privileged users are the trusted users. These are root,
3954 exim, and any caller matching trusted_users or trusted_groups. Trusted callers
3955 are permitted to specify sender_addresses with -f on the command line, and
3956 other message parameters as well. */
3957
3958 if (real_uid == root_uid || real_uid == exim_uid)
3959 f.trusted_caller = TRUE;
3960 else
3961 {
3962 if (trusted_users)
3963 for (int i = 1; i <= (int)trusted_users[0] && !f.trusted_caller; i++)
3964 if (trusted_users[i] == real_uid)
3965 f.trusted_caller = TRUE;
3966
3967 if (trusted_groups)
3968 for (int i = 1; i <= (int)trusted_groups[0] && !f.trusted_caller; i++)
3969 if (trusted_groups[i] == real_gid)
3970 f.trusted_caller = TRUE;
3971 else for (int j = 0; j < group_count && !f.trusted_caller; j++)
3972 if (trusted_groups[i] == group_list[j])
3973 f.trusted_caller = TRUE;
3974 }
3975
3976 /* At this point, we know if the user is privileged and some command-line
3977 options become possibly impermissible, depending upon the configuration file. */
3978
3979 if (checking && commandline_checks_require_admin && !f.admin_user)
3980 exim_fail("exim: those command-line flags are set to require admin\n");
3981
3982 /* Handle the decoding of logging options. */
3983
3984 decode_bits(log_selector, log_selector_size, log_notall,
3985 log_selector_string, log_options, log_options_count, US"log", 0);
3986
3987 DEBUG(D_any)
3988 {
3989 debug_printf("configuration file is %s\n", config_main_filename);
3990 debug_printf("log selectors =");
3991 for (int i = 0; i < log_selector_size; i++)
3992 debug_printf(" %08x", log_selector[i]);
3993 debug_printf("\n");
3994 }
3995
3996 /* If domain literals are not allowed, check the sender address that was
3997 supplied with -f. Ditto for a stripped trailing dot. */
3998
3999 if (sender_address)
4000 {
4001 if (sender_address[sender_address_domain] == '[' && !allow_domain_literals)
4002 exim_fail("exim: bad -f address \"%s\": domain literals not "
4003 "allowed\n", sender_address);
4004 if (f_end_dot && !strip_trailing_dot)
4005 exim_fail("exim: bad -f address \"%s.\": domain is malformed "
4006 "(trailing dot not allowed)\n", sender_address);
4007 }
4008
4009 /* See if an admin user overrode our logging. */
4010
4011 if (cmdline_syslog_name)
4012 if (f.admin_user)
4013 {
4014 syslog_processname = cmdline_syslog_name;
4015 log_file_path = string_copy(CUS"syslog");
4016 }
4017 else
4018 /* not a panic, non-privileged users should not be able to spam paniclog */
4019 exim_fail(
4020 "exim: you lack sufficient privilege to specify syslog process name\n");
4021
4022 /* Paranoia check of maximum lengths of certain strings. There is a check
4023 on the length of the log file path in log.c, which will come into effect
4024 if there are any calls to write the log earlier than this. However, if we
4025 get this far but the string is very long, it is better to stop now than to
4026 carry on and (e.g.) receive a message and then have to collapse. The call to
4027 log_write() from here will cause the ultimate panic collapse if the complete
4028 file name exceeds the buffer length. */
4029
4030 if (Ustrlen(log_file_path) > 200)
4031 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
4032 "log_file_path is longer than 200 chars: aborting");
4033
4034 if (Ustrlen(pid_file_path) > 200)
4035 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
4036 "pid_file_path is longer than 200 chars: aborting");
4037
4038 if (Ustrlen(spool_directory) > 200)
4039 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
4040 "spool_directory is longer than 200 chars: aborting");
4041
4042 /* Length check on the process name given to syslog for its TAG field,
4043 which is only permitted to be 32 characters or less. See RFC 3164. */
4044
4045 if (Ustrlen(syslog_processname) > 32)
4046 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
4047 "syslog_processname is longer than 32 chars: aborting");
4048
4049 if (log_oneline)
4050 if (f.admin_user)
4051 {
4052 log_write(0, LOG_MAIN, "%s", log_oneline);
4053 return EXIT_SUCCESS;
4054 }
4055 else
4056 return EXIT_FAILURE;
4057
4058 /* In some operating systems, the environment variable TMPDIR controls where
4059 temporary files are created; Exim doesn't use these (apart from when delivering
4060 to MBX mailboxes), but called libraries such as DBM libraries may require them.
4061 If TMPDIR is found in the environment, reset it to the value defined in the
4062 EXIM_TMPDIR macro, if this macro is defined. For backward compatibility this
4063 macro may be called TMPDIR in old "Local/Makefile"s. It's converted to
4064 EXIM_TMPDIR by the build scripts.
4065 */
4066
4067 #ifdef EXIM_TMPDIR
4068 if (environ) for (uschar ** p = USS environ; *p; p++)
4069 if (Ustrncmp(*p, "TMPDIR=", 7) == 0 && Ustrcmp(*p+7, EXIM_TMPDIR) != 0)
4070 {
4071 uschar * newp = store_malloc(Ustrlen(EXIM_TMPDIR) + 8);
4072 sprintf(CS newp, "TMPDIR=%s", EXIM_TMPDIR);
4073 *p = newp;
4074 DEBUG(D_any) debug_printf("reset TMPDIR=%s in environment\n", EXIM_TMPDIR);
4075 }
4076 #endif
4077
4078 /* Timezone handling. If timezone_string is "utc", set a flag to cause all
4079 timestamps to be in UTC (gmtime() is used instead of localtime()). Otherwise,
4080 we may need to get rid of a bogus timezone setting. This can arise when Exim is
4081 called by a user who has set the TZ variable. This then affects the timestamps
4082 in log files and in Received: headers, and any created Date: header lines. The
4083 required timezone is settable in the configuration file, so nothing can be done
4084 about this earlier - but hopefully nothing will normally be logged earlier than
4085 this. We have to make a new environment if TZ is wrong, but don't bother if
4086 timestamps_utc is set, because then all times are in UTC anyway. */
4087
4088 if (timezone_string && strcmpic(timezone_string, US"UTC") == 0)
4089 f.timestamps_utc = TRUE;
4090 else
4091 {
4092 uschar *envtz = US getenv("TZ");
4093 if (envtz
4094 ? !timezone_string || Ustrcmp(timezone_string, envtz) != 0
4095 : timezone_string != NULL
4096 )
4097 {
4098 uschar **p = USS environ;
4099 uschar **new;
4100 uschar **newp;
4101 int count = 0;
4102 if (environ) while (*p++) count++;
4103 if (!envtz) count++;
4104 newp = new = store_malloc(sizeof(uschar *) * (count + 1));
4105 if (environ) for (p = USS environ; *p; p++)
4106 if (Ustrncmp(*p, "TZ=", 3) != 0) *newp++ = *p;
4107 if (timezone_string)
4108 {
4109 *newp = store_malloc(Ustrlen(timezone_string) + 4);
4110 sprintf(CS *newp++, "TZ=%s", timezone_string);
4111 }
4112 *newp = NULL;
4113 environ = CSS new;
4114 tzset();
4115 DEBUG(D_any) debug_printf("Reset TZ to %s: time is %s\n", timezone_string,
4116 tod_stamp(tod_log));
4117 }
4118 }
4119
4120 /* Handle the case when we have removed the setuid privilege because of -C or
4121 -D. This means that the caller of Exim was not root.
4122
4123 There is a problem if we were running as the Exim user. The sysadmin may
4124 expect this case to retain privilege because "the binary was called by the
4125 Exim user", but it hasn't, because either the -D option set macros, or the
4126 -C option set a non-trusted configuration file. There are two possibilities:
4127
4128 (1) If deliver_drop_privilege is set, Exim is not going to re-exec in order
4129 to do message deliveries. Thus, the fact that it is running as a
4130 non-privileged user is plausible, and might be wanted in some special
4131 configurations. However, really_exim will have been set false when
4132 privilege was dropped, to stop Exim trying to write to its normal log
4133 files. Therefore, re-enable normal log processing, assuming the sysadmin
4134 has set up the log directory correctly.
4135
4136 (2) If deliver_drop_privilege is not set, the configuration won't work as
4137 apparently intended, and so we log a panic message. In order to retain
4138 root for -C or -D, the caller must either be root or be invoking a
4139 trusted configuration file (when deliver_drop_privilege is false). */
4140
4141 if ( removed_privilege
4142 && (!f.trusted_config || opt_D_used)
4143 && real_uid == exim_uid)
4144 if (deliver_drop_privilege)
4145 f.really_exim = TRUE; /* let logging work normally */
4146 else
4147 log_write(0, LOG_MAIN|LOG_PANIC,
4148 "exim user lost privilege for using %s option",
4149 f.trusted_config? "-D" : "-C");
4150
4151 /* Start up Perl interpreter if Perl support is configured and there is a
4152 perl_startup option, and the configuration or the command line specifies
4153 initializing starting. Note that the global variables are actually called
4154 opt_perl_xxx to avoid clashing with perl's namespace (perl_*). */
4155
4156 #ifdef EXIM_PERL
4157 if (perl_start_option != 0)
4158 opt_perl_at_start = (perl_start_option > 0);
4159 if (opt_perl_at_start && opt_perl_startup != NULL)
4160 {
4161 uschar *errstr;
4162 DEBUG(D_any) debug_printf("Starting Perl interpreter\n");
4163 if ((errstr = init_perl(opt_perl_startup)))
4164 exim_fail("exim: error in perl_startup code: %s\n", errstr);
4165 opt_perl_started = TRUE;
4166 }
4167 #endif /* EXIM_PERL */
4168
4169 /* Log the arguments of the call if the configuration file said so. This is
4170 a debugging feature for finding out what arguments certain MUAs actually use.
4171 Don't attempt it if logging is disabled, or if listing variables or if
4172 verifying/testing addresses or expansions. */
4173
4174 if ( (debug_selector & D_any || LOGGING(arguments))
4175 && f.really_exim && !list_options && !checking)
4176 {
4177 uschar *p = big_buffer;
4178 Ustrcpy(p, US"cwd= (failed)");
4179
4180 if (!initial_cwd)
4181 p += 13;
4182 else
4183 {
4184 p += 4;
4185 snprintf(CS p, big_buffer_size - (p - big_buffer), "%s", CCS initial_cwd);
4186 p += Ustrlen(CCS p);
4187 }
4188
4189 (void)string_format(p, big_buffer_size - (p - big_buffer), " %d args:", argc);
4190 while (*p) p++;
4191 for (int i = 0; i < argc; i++)
4192 {
4193 int len = Ustrlen(argv[i]);
4194 const uschar *printing;
4195 uschar *quote;
4196 if (p + len + 8 >= big_buffer + big_buffer_size)
4197 {
4198 Ustrcpy(p, US" ...");
4199 log_write(0, LOG_MAIN, "%s", big_buffer);
4200 Ustrcpy(big_buffer, US"...");
4201 p = big_buffer + 3;
4202 }
4203 printing = string_printing(argv[i]);
4204 if (!*printing) quote = US"\"";
4205 else
4206 {
4207 const uschar *pp = printing;
4208 quote = US"";
4209 while (*pp) if (isspace(*pp++)) { quote = US"\""; break; }
4210 }
4211 p += sprintf(CS p, " %s%.*s%s", quote, (int)(big_buffer_size -
4212 (p - big_buffer) - 4), printing, quote);
4213 }
4214
4215 if (LOGGING(arguments))
4216 log_write(0, LOG_MAIN, "%s", big_buffer);
4217 else
4218 debug_printf("%s\n", big_buffer);
4219 }
4220
4221 /* Set the working directory to be the top-level spool directory. We don't rely
4222 on this in the code, which always uses fully qualified names, but it's useful
4223 for core dumps etc. Don't complain if it fails - the spool directory might not
4224 be generally accessible and calls with the -C option (and others) have lost
4225 privilege by now. Before the chdir, we try to ensure that the directory exists.
4226 */
4227
4228 if (Uchdir(spool_directory) != 0)
4229 {
4230 (void) directory_make(spool_directory, US"", SPOOL_DIRECTORY_MODE, FALSE);
4231 (void) Uchdir(spool_directory);
4232 }
4233
4234 /* Handle calls with the -bi option. This is a sendmail option to rebuild *the*
4235 alias file. Exim doesn't have such a concept, but this call is screwed into
4236 Sun's YP makefiles. Handle this by calling a configured script, as the real
4237 user who called Exim. The -oA option can be used to pass an argument to the
4238 script. */
4239
4240 if (bi_option)
4241 {
4242 (void) fclose(config_file);
4243 if (bi_command && *bi_command)
4244 {
4245 int i = 0;
4246 uschar *argv[3];
4247 argv[i++] = bi_command;
4248 if (alias_arg) argv[i++] = alias_arg;
4249 argv[i++] = NULL;
4250
4251 setgroups(group_count, group_list);
4252 exim_setugid(real_uid, real_gid, FALSE, US"running bi_command");
4253
4254 DEBUG(D_exec) debug_printf("exec '%.256s' %s%.256s%s\n", argv[0],
4255 argv[1] ? "'" : "", argv[1] ? argv[1] : US"", argv[1] ? "'" : "");
4256
4257 execv(CS argv[0], (char *const *)argv);
4258 exim_fail("exim: exec '%s' failed: %s\n", argv[0], strerror(errno));
4259 }
4260 else
4261 {
4262 DEBUG(D_any) debug_printf("-bi used but bi_command not set; exiting\n");
4263 exit(EXIT_SUCCESS);
4264 }
4265 }
4266
4267 /* We moved the admin/trusted check to be immediately after reading the
4268 configuration file. We leave these prints here to ensure that syslog setup,
4269 logfile setup, and so on has already happened. */
4270
4271 if (f.trusted_caller) DEBUG(D_any) debug_printf("trusted user\n");
4272 if (f.admin_user) DEBUG(D_any) debug_printf("admin user\n");
4273
4274 /* Only an admin user may start the daemon or force a queue run in the default
4275 configuration, but the queue run restriction can be relaxed. Only an admin
4276 user may request that a message be returned to its sender forthwith. Only an
4277 admin user may specify a debug level greater than D_v (because it might show
4278 passwords, etc. in lookup queries). Only an admin user may request a queue
4279 count. Only an admin user can use the test interface to scan for email
4280 (because Exim will be in the spool dir and able to look at mails). */
4281
4282 if (!f.admin_user)
4283 {
4284 BOOL debugset = (debug_selector & ~D_v) != 0;
4285 if ( deliver_give_up || f.daemon_listen || malware_test_file
4286 || count_queue && queue_list_requires_admin
4287 || list_queue && queue_list_requires_admin
4288 || queue_interval >= 0 && prod_requires_admin
4289 || queue_name_dest && prod_requires_admin
4290 || debugset && !f.running_in_test_harness
4291 )
4292 exim_fail("exim:%s permission denied\n", debugset ? " debugging" : "");
4293 }
4294
4295 /* If the real user is not root or the exim uid, the argument for passing
4296 in an open TCP/IP connection for another message is not permitted, nor is
4297 running with the -N option for any delivery action, unless this call to exim is
4298 one that supplied an input message, or we are using a patched exim for
4299 regression testing. */
4300
4301 if ( real_uid != root_uid && real_uid != exim_uid
4302 && ( continue_hostname
4303 || ( f.dont_deliver
4304 && (queue_interval >= 0 || f.daemon_listen || msg_action_arg > 0)
4305 ) )
4306 && !f.running_in_test_harness
4307 )
4308 exim_fail("exim: Permission denied\n");
4309
4310 /* If the caller is not trusted, certain arguments are ignored when running for
4311 real, but are permitted when checking things (-be, -bv, -bt, -bh, -bf, -bF).
4312 Note that authority for performing certain actions on messages is tested in the
4313 queue_action() function. */
4314
4315 if (!f.trusted_caller && !checking)
4316 {
4317 sender_host_name = sender_host_address = interface_address =
4318 sender_ident = received_protocol = NULL;
4319 sender_host_port = interface_port = 0;
4320 sender_host_authenticated = authenticated_sender = authenticated_id = NULL;
4321 }
4322
4323 /* If a sender host address is set, extract the optional port number off the
4324 end of it and check its syntax. Do the same thing for the interface address.
4325 Exim exits if the syntax is bad. */
4326
4327 else
4328 {
4329 if (sender_host_address)
4330 sender_host_port = check_port(sender_host_address);
4331 if (interface_address)
4332 interface_port = check_port(interface_address);
4333 }
4334
4335 /* If the caller is trusted, then they can use -G to suppress_local_fixups. */
4336 if (flag_G)
4337 {
4338 if (f.trusted_caller)
4339 {
4340 f.suppress_local_fixups = f.suppress_local_fixups_default = TRUE;
4341 DEBUG(D_acl) debug_printf("suppress_local_fixups forced on by -G\n");
4342 }
4343 else
4344 exim_fail("exim: permission denied (-G requires a trusted user)\n");
4345 }
4346
4347 /* If an SMTP message is being received check to see if the standard input is a
4348 TCP/IP socket. If it is, we assume that Exim was called from inetd if the
4349 caller is root or the Exim user, or if the port is a privileged one. Otherwise,
4350 barf. */
4351
4352 if (smtp_input)
4353 {
4354 union sockaddr_46 inetd_sock;
4355 EXIM_SOCKLEN_T size = sizeof(inetd_sock);
4356 if (getpeername(0, (struct sockaddr *)(&inetd_sock), &size) == 0)
4357 {
4358 int family = ((struct sockaddr *)(&inetd_sock))->sa_family;
4359 if (family == AF_INET || family == AF_INET6)
4360 {
4361 union sockaddr_46 interface_sock;
4362 size = sizeof(interface_sock);
4363
4364 if (getsockname(0, (struct sockaddr *)(&interface_sock), &size) == 0)
4365 interface_address = host_ntoa(-1, &interface_sock, NULL,
4366 &interface_port);
4367
4368 if (host_is_tls_on_connect_port(interface_port)) tls_in.on_connect = TRUE;
4369
4370 if (real_uid == root_uid || real_uid == exim_uid || interface_port < 1024)
4371 {
4372 f.is_inetd = TRUE;
4373 sender_host_address = host_ntoa(-1, (struct sockaddr *)(&inetd_sock),
4374 NULL, &sender_host_port);
4375 if (mua_wrapper) log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Input from "
4376 "inetd is not supported when mua_wrapper is set");
4377 }
4378 else
4379 exim_fail(
4380 "exim: Permission denied (unprivileged user, unprivileged port)\n");
4381 }
4382 }
4383 }
4384
4385 /* If the load average is going to be needed while receiving a message, get it
4386 now for those OS that require the first call to os_getloadavg() to be done as
4387 root. There will be further calls later for each message received. */
4388
4389 #ifdef LOAD_AVG_NEEDS_ROOT
4390 if ( receiving_message
4391 && (queue_only_load >= 0 || (f.is_inetd && smtp_load_reserve >= 0)))
4392 load_average = OS_GETLOADAVG();
4393 #endif
4394
4395 /* The queue_only configuration option can be overridden by -odx on the command
4396 line, except that if queue_only_override is false, queue_only cannot be unset
4397 from the command line. */
4398
4399 if (queue_only_set && (queue_only_override || arg_queue_only))
4400 queue_only = arg_queue_only;
4401
4402 /* The receive_timeout and smtp_receive_timeout options can be overridden by
4403 -or and -os. */
4404
4405 if (arg_receive_timeout >= 0) receive_timeout = arg_receive_timeout;
4406 if (arg_smtp_receive_timeout >= 0)
4407 smtp_receive_timeout = arg_smtp_receive_timeout;
4408
4409 /* If Exim was started with root privilege, unless we have already removed the
4410 root privilege above as a result of -C, -D, -be, -bf or -bF, remove it now
4411 except when starting the daemon or doing some kind of delivery or address
4412 testing (-bt). These are the only cases when root need to be retained. We run
4413 as exim for -bv and -bh. However, if deliver_drop_privilege is set, root is
4414 retained only for starting the daemon. We always do the initgroups() in this
4415 situation (controlled by the TRUE below), in order to be as close as possible
4416 to the state Exim usually runs in. */
4417
4418 if ( !unprivileged /* originally had root AND */
4419 && !removed_privilege /* still got root AND */
4420 && !f.daemon_listen /* not starting the daemon */
4421 && queue_interval <= 0 /* (either kind of daemon) */
4422 && ( /* AND EITHER */
4423 deliver_drop_privilege /* requested unprivileged */
4424 || ( /* OR */
4425 queue_interval < 0 /* not running the queue */
4426 && ( msg_action_arg < 0 /* and */
4427 || msg_action != MSG_DELIVER /* not delivering */
4428 ) /* and */
4429 && (!checking || !f.address_test_mode) /* not address checking */
4430 && !rcpt_verify_quota /* and not quota checking */
4431 ) ) )
4432 exim_setugid(exim_uid, exim_gid, TRUE, US"privilege not needed");
4433
4434 /* When we are retaining a privileged uid, we still change to the exim gid. */
4435
4436 else
4437 {
4438 int rv;
4439 DEBUG(D_any) debug_printf("dropping to exim gid; retaining priv uid\n");
4440 rv = setgid(exim_gid);
4441 /* Impact of failure is that some stuff might end up with an incorrect group.
4442 We track this for failures from root, since any attempt to change privilege
4443 by root should succeed and failures should be examined. For non-root,
4444 there's no security risk. For me, it's { exim -bV } on a just-built binary,
4445 no need to complain then. */
4446 if (rv == -1)
4447 if (!(unprivileged || removed_privilege))
4448 exim_fail("exim: changing group failed: %s\n", strerror(errno));
4449 else
4450 {
4451 DEBUG(D_any) debug_printf("changing group to %ld failed: %s\n",
4452 (long int)exim_gid, strerror(errno));
4453 }
4454 }
4455
4456 /* Handle a request to scan a file for malware */
4457 if (malware_test_file)
4458 {
4459 #ifdef WITH_CONTENT_SCAN
4460 int result;
4461 set_process_info("scanning file for malware");
4462 if ((result = malware_in_file(malware_test_file)) == FAIL)
4463 {
4464 printf("No malware found.\n");
4465 exit(EXIT_SUCCESS);
4466 }
4467 if (result != OK)
4468 {
4469 printf("Malware lookup returned non-okay/fail: %d\n", result);
4470 exit(EXIT_FAILURE);
4471 }
4472 if (malware_name)
4473 printf("Malware found: %s\n", malware_name);
4474 else
4475 printf("Malware scan detected malware of unknown name.\n");
4476 #else
4477 printf("Malware scanning not enabled at compile time.\n");
4478 #endif
4479 exit(EXIT_FAILURE);
4480 }
4481
4482 /* Handle a request to list the delivery queue */
4483
4484 if (list_queue)
4485 {
4486 set_process_info("listing the queue");
4487 queue_list(list_queue_option, argv + recipients_arg, argc - recipients_arg);
4488 exit(EXIT_SUCCESS);
4489 }
4490
4491 /* Handle a request to count the delivery queue */
4492
4493 if (count_queue)
4494 {
4495 set_process_info("counting the queue");
4496 fprintf(stdout, "%u\n", queue_count());
4497 exit(EXIT_SUCCESS);
4498 }
4499
4500 /* Handle actions on specific messages, except for the force delivery and
4501 message load actions, which are done below. Some actions take a whole list of
4502 message ids, which are known to continue up to the end of the arguments. Others
4503 take a single message id and then operate on the recipients list. */
4504
4505 if (msg_action_arg > 0 && msg_action != MSG_DELIVER && msg_action != MSG_LOAD)
4506 {
4507 int yield = EXIT_SUCCESS;
4508 set_process_info("acting on specified messages");
4509
4510 /* ACL definitions may be needed when removing a message (-Mrm) because
4511 event_action gets expanded */
4512
4513 if (msg_action == MSG_REMOVE)
4514 {
4515 int old_pool = store_pool;
4516 store_pool = POOL_CONFIG;
4517 readconf_rest();
4518 store_pool = old_pool;
4519 store_writeprotect(POOL_CONFIG);
4520 }
4521
4522 if (!one_msg_action)
4523 {
4524 for (i = msg_action_arg; i < argc; i++)
4525 if (!queue_action(argv[i], msg_action, NULL, 0, 0))
4526 yield = EXIT_FAILURE;
4527 switch (msg_action)
4528 {
4529 case MSG_REMOVE: case MSG_FREEZE: case MSG_THAW: break;
4530 default: printf("\n"); break;
4531 }
4532 }
4533
4534 else if (!queue_action(argv[msg_action_arg], msg_action, argv, argc,
4535 recipients_arg)) yield = EXIT_FAILURE;
4536 exit(yield);
4537 }
4538
4539 /* We used to set up here to skip reading the ACL section, on
4540 (msg_action_arg > 0 || (queue_interval == 0 && !f.daemon_listen)
4541 Now, since the intro of the ${acl } expansion, ACL definitions may be
4542 needed in transports so we lost the optimisation. */
4543
4544 {
4545 int old_pool = store_pool;
4546 #ifdef MEASURE_TIMING
4547 struct timeval t0, diff;
4548 (void)gettimeofday(&t0, NULL);
4549 #endif
4550
4551 store_pool = POOL_CONFIG;
4552 readconf_rest();
4553 store_pool = old_pool;
4554 store_writeprotect(POOL_CONFIG);
4555
4556 #ifdef MEASURE_TIMING
4557 report_time_since(&t0, US"readconf_rest (delta)");
4558 #endif
4559 }
4560
4561 /* Handle a request to check quota */
4562 if (rcpt_verify_quota)
4563 if (real_uid != root_uid && real_uid != exim_uid)
4564 exim_fail("exim: Permission denied\n");
4565 else if (recipients_arg >= argc)
4566 exim_fail("exim: missing recipient for quota check\n");
4567 else
4568 {
4569 verify_quota(argv[recipients_arg]);
4570 exim_exit(EXIT_SUCCESS);
4571 }
4572
4573 /* Handle the -brt option. This is for checking out retry configurations.
4574 The next three arguments are a domain name or a complete address, and
4575 optionally two error numbers. All it does is to call the function that
4576 scans the retry configuration data. */
4577
4578 if (test_retry_arg >= 0)
4579 {
4580 retry_config *yield;
4581 int basic_errno = 0;
4582 int more_errno = 0;
4583 const uschar *s1, *s2;
4584
4585 if (test_retry_arg >= argc)
4586 {
4587 printf("-brt needs a domain or address argument\n");
4588 exim_exit(EXIT_FAILURE);
4589 }
4590 s1 = exim_str_fail_toolong(argv[test_retry_arg++], EXIM_EMAILADDR_MAX, "-brt");
4591 s2 = NULL;
4592
4593 /* If the first argument contains no @ and no . it might be a local user
4594 or it might be a single-component name. Treat as a domain. */
4595
4596 if (Ustrchr(s1, '@') == NULL && Ustrchr(s1, '.') == NULL)
4597 {
4598 printf("Warning: \"%s\" contains no '@' and no '.' characters. It is "
4599 "being \ntreated as a one-component domain, not as a local part.\n\n",
4600 s1);
4601 }
4602
4603 /* There may be an optional second domain arg. */
4604
4605 if (test_retry_arg < argc && Ustrchr(argv[test_retry_arg], '.') != NULL)
4606 s2 = exim_str_fail_toolong(argv[test_retry_arg++], EXIM_DOMAINNAME_MAX, "-brt 2nd");
4607
4608 /* The final arg is an error name */
4609
4610 if (test_retry_arg < argc)
4611 {
4612 const uschar *ss = exim_str_fail_toolong(argv[test_retry_arg], EXIM_DRIVERNAME_MAX, "-brt 3rd");
4613 uschar *error =
4614 readconf_retry_error(ss, ss + Ustrlen(ss), &basic_errno, &more_errno);
4615 if (error != NULL)
4616 {
4617 printf("%s\n", CS error);
4618 return EXIT_FAILURE;
4619 }
4620
4621 /* For the {MAIL,RCPT,DATA}_4xx errors, a value of 255 means "any", and a
4622 code > 100 as an error is for matching codes to the decade. Turn them into
4623 a real error code, off the decade. */
4624
4625 if (basic_errno == ERRNO_MAIL4XX ||
4626 basic_errno == ERRNO_RCPT4XX ||
4627 basic_errno == ERRNO_DATA4XX)
4628 {
4629 int code = (more_errno >> 8) & 255;
4630 if (code == 255)
4631 more_errno = (more_errno & 0xffff00ff) | (21 << 8);
4632 else if (code > 100)
4633 more_errno = (more_errno & 0xffff00ff) | ((code - 96) << 8);
4634 }
4635 }
4636
4637 if (!(yield = retry_find_config(s1, s2, basic_errno, more_errno)))
4638 printf("No retry information found\n");
4639 else
4640 {
4641 more_errno = yield->more_errno;
4642 printf("Retry rule: %s ", yield->pattern);
4643
4644 if (yield->basic_errno == ERRNO_EXIMQUOTA)
4645 {
4646 printf("quota%s%s ",
4647 (more_errno > 0)? "_" : "",
4648 (more_errno > 0)? readconf_printtime(more_errno) : US"");
4649 }
4650 else if (yield->basic_errno == ECONNREFUSED)
4651 {
4652 printf("refused%s%s ",
4653 (more_errno > 0)? "_" : "",
4654 (more_errno == 'M')? "MX" :
4655 (more_errno == 'A')? "A" : "");
4656 }
4657 else if (yield->basic_errno == ETIMEDOUT)
4658 {
4659 printf("timeout");
4660 if ((more_errno & RTEF_CTOUT) != 0) printf("_connect");
4661 more_errno &= 255;
4662 if (more_errno != 0) printf("_%s",
4663 (more_errno == 'M')? "MX" : "A");
4664 printf(" ");
4665 }
4666 else if (yield->basic_errno == ERRNO_AUTHFAIL)
4667 printf("auth_failed ");
4668 else printf("* ");
4669
4670 for (retry_rule * r = yield->rules; r; r = r->next)
4671 {
4672 printf("%c,%s", r->rule, readconf_printtime(r->timeout)); /* Do not */
4673 printf(",%s", readconf_printtime(r->p1)); /* amalgamate */
4674 if (r->rule == 'G')
4675 {
4676 int x = r->p2;
4677 int f = x % 1000;
4678 int d = 100;
4679 printf(",%d.", x/1000);
4680 do
4681 {
4682 printf("%d", f/d);
4683 f %= d;
4684 d /= 10;
4685 }
4686 while (f != 0);
4687 }
4688 printf("; ");
4689 }
4690
4691 printf("\n");
4692 }
4693 exim_exit(EXIT_SUCCESS);
4694 }
4695
4696 /* Handle a request to list one or more configuration options */
4697 /* If -n was set, we suppress some information */
4698
4699 if (list_options)
4700 {
4701 BOOL fail = FALSE;
4702 set_process_info("listing variables");
4703 if (recipients_arg >= argc)
4704 fail = !readconf_print(US"all", NULL, flag_n);
4705 else for (i = recipients_arg; i < argc; i++)
4706 {
4707 if (i < argc - 1 &&
4708 (Ustrcmp(argv[i], "router") == 0 ||
4709 Ustrcmp(argv[i], "transport") == 0 ||
4710 Ustrcmp(argv[i], "authenticator") == 0 ||
4711 Ustrcmp(argv[i], "macro") == 0 ||
4712 Ustrcmp(argv[i], "environment") == 0))
4713 {
4714 fail |= !readconf_print(exim_str_fail_toolong(argv[i+1], EXIM_DRIVERNAME_MAX, "-bP name"), argv[i], flag_n);
4715 i++;
4716 }
4717 else
4718 fail = !readconf_print(exim_str_fail_toolong(argv[i], EXIM_DRIVERNAME_MAX, "-bP item"), NULL, flag_n);
4719 }
4720 exim_exit(fail ? EXIT_FAILURE : EXIT_SUCCESS);
4721 }
4722
4723 if (list_config)
4724 {
4725 set_process_info("listing config");
4726 exim_exit(readconf_print(US"config", NULL, flag_n)
4727 ? EXIT_SUCCESS : EXIT_FAILURE);
4728 }
4729
4730
4731 /* Initialise subsystems as required. */
4732
4733 tcp_init();
4734
4735 /* Handle a request to deliver one or more messages that are already on the
4736 queue. Values of msg_action other than MSG_DELIVER and MSG_LOAD are dealt with
4737 above. MSG_LOAD is handled with -be (which is the only time it applies) below.
4738
4739 Delivery of specific messages is typically used for a small number when
4740 prodding by hand (when the option forced_delivery will be set) or when
4741 re-execing to regain root privilege. Each message delivery must happen in a
4742 separate process, so we fork a process for each one, and run them sequentially
4743 so that debugging output doesn't get intertwined, and to avoid spawning too
4744 many processes if a long list is given. However, don't fork for the last one;
4745 this saves a process in the common case when Exim is called to deliver just one
4746 message. */
4747
4748 if (msg_action_arg > 0 && msg_action != MSG_LOAD)
4749 {
4750 if (prod_requires_admin && !f.admin_user)
4751 {
4752 fprintf(stderr, "exim: Permission denied\n");
4753 exim_exit(EXIT_FAILURE);
4754 }
4755 set_process_info("delivering specified messages");
4756 if (deliver_give_up) forced_delivery = f.deliver_force_thaw = TRUE;
4757 for (i = msg_action_arg; i < argc; i++)
4758 {
4759 int status;
4760 pid_t pid;
4761 /*XXX This use of argv[i] for msg_id should really be tainted, but doing
4762 that runs into a later copy into the untainted global message_id[] */
4763 /*XXX Do we need a length limit check here? */
4764 if (i == argc - 1)
4765 (void)deliver_message(argv[i], forced_delivery, deliver_give_up);
4766 else if ((pid = exim_fork(US"cmdline-delivery")) == 0)
4767 {
4768 (void)deliver_message(argv[i], forced_delivery, deliver_give_up);
4769 exim_underbar_exit(EXIT_SUCCESS);
4770 }
4771 else if (pid < 0)
4772 {
4773 fprintf(stderr, "failed to fork delivery process for %s: %s\n", argv[i],
4774 strerror(errno));
4775 exim_exit(EXIT_FAILURE);
4776 }
4777 else wait(&status);
4778 }
4779 exim_exit(EXIT_SUCCESS);
4780 }
4781
4782
4783 /* If only a single queue run is requested, without SMTP listening, we can just
4784 turn into a queue runner, with an optional starting message id. */
4785
4786 if (queue_interval == 0 && !f.daemon_listen)
4787 {
4788 DEBUG(D_queue_run) debug_printf("Single queue run%s%s%s%s\n",
4789 start_queue_run_id ? US" starting at " : US"",
4790 start_queue_run_id ? start_queue_run_id: US"",
4791 stop_queue_run_id ? US" stopping at " : US"",
4792 stop_queue_run_id ? stop_queue_run_id : US"");
4793 if (*queue_name)
4794 set_process_info("running the '%s' queue (single queue run)", queue_name);
4795 else
4796 set_process_info("running the queue (single queue run)");
4797 queue_run(start_queue_run_id, stop_queue_run_id, FALSE);
4798 exim_exit(EXIT_SUCCESS);
4799 }
4800
4801
4802 /* Find the login name of the real user running this process. This is always
4803 needed when receiving a message, because it is written into the spool file. It
4804 may also be used to construct a from: or a sender: header, and in this case we
4805 need the user's full name as well, so save a copy of it, checked for RFC822
4806 syntax and munged if necessary, if it hasn't previously been set by the -F
4807 argument. We may try to get the passwd entry more than once, in case NIS or
4808 other delays are in evidence. Save the home directory for use in filter testing
4809 (only). */
4810
4811 for (i = 0;;)
4812 {
4813 if ((pw = getpwuid(real_uid)) != NULL)
4814 {
4815 originator_login = string_copy(US pw->pw_name);
4816 originator_home = string_copy(US pw->pw_dir);
4817
4818 /* If user name has not been set by -F, set it from the passwd entry
4819 unless -f has been used to set the sender address by a trusted user. */
4820
4821 if (!originator_name)
4822 {
4823 if (!sender_address || (!f.trusted_caller && filter_test == FTEST_NONE))
4824 {
4825 uschar *name = US pw->pw_gecos;
4826 uschar *amp = Ustrchr(name, '&');
4827 uschar buffer[256];
4828
4829 /* Most Unix specify that a '&' character in the gecos field is
4830 replaced by a copy of the login name, and some even specify that
4831 the first character should be upper cased, so that's what we do. */
4832
4833 if (amp)
4834 {
4835 int loffset;
4836 string_format(buffer, sizeof(buffer), "%.*s%n%s%s",
4837 (int)(amp - name), name, &loffset, originator_login, amp + 1);
4838 buffer[loffset] = toupper(buffer[loffset]);
4839 name = buffer;
4840 }
4841
4842 /* If a pattern for matching the gecos field was supplied, apply
4843 it and then expand the name string. */
4844
4845 if (gecos_pattern && gecos_name)
4846 {
4847 const pcre *re;
4848 re = regex_must_compile(gecos_pattern, FALSE, TRUE); /* Use malloc */
4849
4850 if (regex_match_and_setup(re, name, 0, -1))
4851 {
4852 uschar *new_name = expand_string(gecos_name);
4853 expand_nmax = -1;
4854 if (new_name)
4855 {
4856 DEBUG(D_receive) debug_printf("user name \"%s\" extracted from "
4857 "gecos field \"%s\"\n", new_name, name);
4858 name = new_name;
4859 }
4860 else DEBUG(D_receive) debug_printf("failed to expand gecos_name string "
4861 "\"%s\": %s\n", gecos_name, expand_string_message);
4862 }
4863 else DEBUG(D_receive) debug_printf("gecos_pattern \"%s\" did not match "
4864 "gecos field \"%s\"\n", gecos_pattern, name);
4865 store_free((void *)re);
4866 }
4867 originator_name = string_copy(name);
4868 }
4869
4870 /* A trusted caller has used -f but not -F */
4871
4872 else originator_name = US"";
4873 }
4874
4875 /* Break the retry loop */
4876
4877 break;
4878 }
4879
4880 if (++i > finduser_retries) break;
4881 sleep(1);
4882 }
4883
4884 /* If we cannot get a user login, log the incident and give up, unless the
4885 configuration specifies something to use. When running in the test harness,
4886 any setting of unknown_login overrides the actual name. */
4887
4888 if (!originator_login || f.running_in_test_harness)
4889 {
4890 if (unknown_login)
4891 {
4892 originator_login = expand_string(unknown_login);
4893 if (!originator_name && unknown_username)
4894 originator_name = expand_string(unknown_username);
4895 if (!originator_name) originator_name = US"";
4896 }
4897 if (!originator_login)
4898 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Failed to get user name for uid %d",
4899 (int)real_uid);
4900 }
4901
4902 /* Ensure that the user name is in a suitable form for use as a "phrase" in an
4903 RFC822 address.*/
4904
4905 originator_name = US parse_fix_phrase(originator_name, Ustrlen(originator_name));
4906
4907 /* If a message is created by this call of Exim, the uid/gid of its originator
4908 are those of the caller. These values are overridden if an existing message is
4909 read in from the spool. */
4910
4911 originator_uid = real_uid;
4912 originator_gid = real_gid;
4913
4914 DEBUG(D_receive) debug_printf("originator: uid=%d gid=%d login=%s name=%s\n",
4915 (int)originator_uid, (int)originator_gid, originator_login, originator_name);
4916
4917 /* Run in daemon and/or queue-running mode. The function daemon_go() never
4918 returns. We leave this till here so that the originator_ fields are available
4919 for incoming messages via the daemon. The daemon cannot be run in mua_wrapper
4920 mode. */
4921
4922 if (f.daemon_listen || f.inetd_wait_mode || queue_interval > 0)
4923 {
4924 if (mua_wrapper)
4925 {
4926 fprintf(stderr, "Daemon cannot be run when mua_wrapper is set\n");
4927 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Daemon cannot be run when "
4928 "mua_wrapper is set");
4929 }
4930
4931 # ifndef DISABLE_TLS
4932 /* This also checks that the library linkage is working and we can call
4933 routines in it, so call even if tls_require_ciphers is unset */
4934 {
4935 # ifdef MEASURE_TIMING
4936 struct timeval t0, diff;
4937 (void)gettimeofday(&t0, NULL);
4938 # endif
4939 if (!tls_dropprivs_validate_require_cipher(FALSE))
4940 exit(1);
4941 # ifdef MEASURE_TIMING
4942 report_time_since(&t0, US"validate_ciphers (delta)");
4943 # endif
4944 }
4945 #endif
4946
4947 daemon_go();
4948 }
4949
4950 /* If the sender ident has not been set (by a trusted caller) set it to
4951 the caller. This will get overwritten below for an inetd call. If a trusted
4952 caller has set it empty, unset it. */
4953
4954 if (!sender_ident) sender_ident = originator_login;
4955 else if (!*sender_ident) sender_ident = NULL;
4956
4957 /* Handle the -brw option, which is for checking out rewriting rules. Cause log
4958 writes (on errors) to go to stderr instead. Can't do this earlier, as want the
4959 originator_* variables set. */
4960
4961 if (test_rewrite_arg >= 0)
4962 {
4963 f.really_exim = FALSE;
4964 if (test_rewrite_arg >= argc)
4965 {
4966 printf("-brw needs an address argument\n");
4967 exim_exit(EXIT_FAILURE);
4968 }
4969 rewrite_test(exim_str_fail_toolong(argv[test_rewrite_arg], EXIM_EMAILADDR_MAX, "-brw"));
4970 exim_exit(EXIT_SUCCESS);
4971 }
4972
4973 /* A locally-supplied message is considered to be coming from a local user
4974 unless a trusted caller supplies a sender address with -f, or is passing in the
4975 message via SMTP (inetd invocation or otherwise). */
4976
4977 if ( !sender_address && !smtp_input
4978 || !f.trusted_caller && filter_test == FTEST_NONE)
4979 {
4980 f.sender_local = TRUE;
4981
4982 /* A trusted caller can supply authenticated_sender and authenticated_id
4983 via -oMas and -oMai and if so, they will already be set. Otherwise, force
4984 defaults except when host checking. */
4985
4986 if (!authenticated_sender && !host_checking)
4987 authenticated_sender = string_sprintf("%s@%s", originator_login,
4988 qualify_domain_sender);
4989 if (!authenticated_id && !host_checking)
4990 authenticated_id = originator_login;
4991 }
4992
4993 /* Trusted callers are always permitted to specify the sender address.
4994 Untrusted callers may specify it if it matches untrusted_set_sender, or if what
4995 is specified is the empty address. However, if a trusted caller does not
4996 specify a sender address for SMTP input, we leave sender_address unset. This
4997 causes the MAIL commands to be honoured. */
4998
4999 if ( !smtp_input && !sender_address
5000 || !receive_check_set_sender(sender_address))
5001 {
5002 /* Either the caller is not permitted to set a general sender, or this is
5003 non-SMTP input and the trusted caller has not set a sender. If there is no
5004 sender, or if a sender other than <> is set, override with the originator's
5005 login (which will get qualified below), except when checking things. */
5006
5007 if ( !sender_address /* No sender_address set */
5008 || /* OR */
5009 (sender_address[0] != 0 && /* Non-empty sender address, AND */
5010 !checking)) /* Not running tests, including filter tests */
5011 {
5012 sender_address = originator_login;
5013 f.sender_address_forced = FALSE;
5014 sender_address_domain = 0;
5015 }
5016 }
5017
5018 /* Remember whether an untrusted caller set the sender address */
5019
5020 f.sender_set_untrusted = sender_address != originator_login && !f.trusted_caller;
5021
5022 /* Ensure that the sender address is fully qualified unless it is the empty
5023 address, which indicates an error message, or doesn't exist (root caller, smtp
5024 interface, no -f argument). */
5025
5026 if (sender_address && *sender_address && sender_address_domain == 0)
5027 sender_address = string_sprintf("%s@%s", local_part_quote(sender_address),
5028 qualify_domain_sender);
5029
5030 DEBUG(D_receive) debug_printf("sender address = %s\n", sender_address);
5031
5032 /* Handle a request to verify a list of addresses, or test them for delivery.
5033 This must follow the setting of the sender address, since routers can be
5034 predicated upon the sender. If no arguments are given, read addresses from
5035 stdin. Set debug_level to at least D_v to get full output for address testing.
5036 */
5037
5038 if (verify_address_mode || f.address_test_mode)
5039 {
5040 int exit_value = 0;
5041 int flags = vopt_qualify;
5042
5043 if (verify_address_mode)
5044 {
5045 if (!verify_as_sender) flags |= vopt_is_recipient;
5046 DEBUG(D_verify) debug_print_ids(US"Verifying:");
5047 }
5048
5049 else
5050 {
5051 flags |= vopt_is_recipient;
5052 debug_selector |= D_v;
5053 debug_file = stderr;
5054 debug_fd = fileno(debug_file);
5055 DEBUG(D_verify) debug_print_ids(US"Address testing:");
5056 }
5057
5058 if (recipients_arg < argc)
5059 while (recipients_arg < argc)
5060 {
5061 /* Supplied addresses are tainted since they come from a user */
5062 uschar * s = string_copy_taint(exim_str_fail_toolong(argv[recipients_arg++], EXIM_DISPLAYMAIL_MAX, "address verification"), TRUE);
5063 while (*s)
5064 {
5065 BOOL finished = FALSE;
5066 uschar *ss = parse_find_address_end(s, FALSE);
5067 if (*ss == ',') *ss = 0; else finished = TRUE;
5068 test_address(s, flags, &exit_value);
5069 s = ss;
5070 if (!finished)
5071 while (*++s == ',' || isspace(*s)) ;
5072 }
5073 }
5074
5075 else for (;;)
5076 {
5077 uschar * s = get_stdinput(NULL, NULL);
5078 if (!s) break;
5079 test_address(string_copy_taint(exim_str_fail_toolong(s, EXIM_DISPLAYMAIL_MAX, "address verification (stdin)"), TRUE), flags, &exit_value);
5080 }
5081
5082 route_tidyup();
5083 exim_exit(exit_value);
5084 }
5085
5086 /* Handle expansion checking. Either expand items on the command line, or read
5087 from stdin if there aren't any. If -Mset was specified, load the message so
5088 that its variables can be used, but restrict this facility to admin users.
5089 Otherwise, if -bem was used, read a message from stdin. */
5090
5091 if (expansion_test)
5092 {
5093 dns_init(FALSE, FALSE, FALSE);
5094 if (msg_action_arg > 0 && msg_action == MSG_LOAD)
5095 {
5096 uschar * spoolname;
5097 if (!f.admin_user)
5098 exim_fail("exim: permission denied\n");
5099 message_id = US exim_str_fail_toolong(argv[msg_action_arg], MESSAGE_ID_LENGTH, "message-id");
5100 /* Checking the length of the ID is sufficient to validate it.
5101 Get an untainted version so file opens can be done. */
5102 message_id = string_copy_taint(message_id, FALSE);
5103
5104 spoolname = string_sprintf("%s-H", message_id);
5105 if ((deliver_datafile = spool_open_datafile(message_id)) < 0)
5106 printf ("Failed to load message datafile %s\n", message_id);
5107 if (spool_read_header(spoolname, TRUE, FALSE) != spool_read_OK)
5108 printf ("Failed to load message %s\n", message_id);
5109 }
5110
5111 /* Read a test message from a file. We fudge it up to be on stdin, saving
5112 stdin itself for later reading of expansion strings. */
5113
5114 else if (expansion_test_message)
5115 {
5116 int save_stdin = dup(0);
5117 int fd = Uopen(expansion_test_message, O_RDONLY, 0);
5118 if (fd < 0)
5119 exim_fail("exim: failed to open %s: %s\n", expansion_test_message,
5120 strerror(errno));
5121 (void) dup2(fd, 0);
5122 filter_test = FTEST_USER; /* Fudge to make it look like filter test */
5123 message_ended = END_NOTENDED;
5124 read_message_body(receive_msg(extract_recipients));
5125 message_linecount += body_linecount;
5126 (void)dup2(save_stdin, 0);
5127 (void)close(save_stdin);
5128 clearerr(stdin); /* Required by Darwin */
5129 }
5130
5131 /* Only admin users may see config-file macros this way */
5132
5133 if (!f.admin_user) macros_user = macros = mlast = NULL;
5134
5135 /* Allow $recipients for this testing */
5136
5137 f.enable_dollar_recipients = TRUE;
5138
5139 /* Expand command line items */
5140
5141 if (recipients_arg < argc)
5142 while (recipients_arg < argc)
5143 expansion_test_line(exim_str_fail_toolong(argv[recipients_arg++], EXIM_EMAILADDR_MAX, "recipient"));
5144
5145 /* Read stdin */
5146
5147 else
5148 {
5149 char *(*fn_readline)(const char *) = NULL;
5150 void (*fn_addhist)(const char *) = NULL;
5151 uschar * s;
5152
5153 #ifdef USE_READLINE
5154 void *dlhandle = set_readline(&fn_readline, &fn_addhist);
5155 #endif
5156
5157 while (s = get_stdinput(fn_readline, fn_addhist))
5158 expansion_test_line(s);
5159
5160 #ifdef USE_READLINE
5161 if (dlhandle) dlclose(dlhandle);
5162 #endif
5163 }
5164
5165 /* The data file will be open after -Mset */
5166
5167 if (deliver_datafile >= 0)
5168 {
5169 (void)close(deliver_datafile);
5170 deliver_datafile = -1;
5171 }
5172
5173 exim_exit(EXIT_SUCCESS);
5174 }
5175
5176
5177 /* The active host name is normally the primary host name, but it can be varied
5178 for hosts that want to play several parts at once. We need to ensure that it is
5179 set for host checking, and for receiving messages. */
5180
5181 smtp_active_hostname = primary_hostname;
5182 if (raw_active_hostname != NULL)
5183 {
5184 uschar *nah = expand_string(raw_active_hostname);
5185 if (nah == NULL)
5186 {
5187 if (!f.expand_string_forcedfail)
5188 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to expand \"%s\" "
5189 "(smtp_active_hostname): %s", raw_active_hostname,
5190 expand_string_message);
5191 }
5192 else if (nah[0] != 0) smtp_active_hostname = nah;
5193 }
5194
5195 /* Handle host checking: this facility mocks up an incoming SMTP call from a
5196 given IP address so that the blocking and relay configuration can be tested.
5197 Unless a sender_ident was set by -oMt, we discard it (the default is the
5198 caller's login name). An RFC 1413 call is made only if we are running in the
5199 test harness and an incoming interface and both ports are specified, because
5200 there is no TCP/IP call to find the ident for. */
5201
5202 if (host_checking)
5203 {
5204 int x[4];
5205 int size;
5206
5207 if (!sender_ident_set)
5208 {
5209 sender_ident = NULL;
5210 if (f.running_in_test_harness && sender_host_port
5211 && interface_address && interface_port)
5212 verify_get_ident(1223); /* note hardwired port number */
5213 }
5214
5215 /* In case the given address is a non-canonical IPv6 address, canonicalize
5216 it. The code works for both IPv4 and IPv6, as it happens. */
5217
5218 size = host_aton(sender_host_address, x);
5219 sender_host_address = store_get(48, FALSE); /* large enough for full IPv6 */
5220 (void)host_nmtoa(size, x, -1, sender_host_address, ':');
5221
5222 /* Now set up for testing */
5223
5224 host_build_sender_fullhost();
5225 smtp_input = TRUE;
5226 smtp_in = stdin;
5227 smtp_out = stdout;
5228 f.sender_local = FALSE;
5229 f.sender_host_notsocket = TRUE;
5230 debug_file = stderr;
5231 debug_fd = fileno(debug_file);
5232 fprintf(stdout, "\n**** SMTP testing session as if from host %s\n"
5233 "**** but without any ident (RFC 1413) callback.\n"
5234 "**** This is not for real!\n\n",
5235 sender_host_address);
5236
5237 memset(sender_host_cache, 0, sizeof(sender_host_cache));
5238 if (verify_check_host(&hosts_connection_nolog) == OK)
5239 BIT_CLEAR(log_selector, log_selector_size, Li_smtp_connection);
5240 log_write(L_smtp_connection, LOG_MAIN, "%s", smtp_get_connection_info());
5241
5242 /* NOTE: We do *not* call smtp_log_no_mail() if smtp_start_session() fails,
5243 because a log line has already been written for all its failure exists
5244 (usually "connection refused: <reason>") and writing another one is
5245 unnecessary clutter. */
5246
5247 if (smtp_start_session())
5248 {
5249 rmark reset_point;
5250 for (; (reset_point = store_mark()); store_reset(reset_point))
5251 {
5252 if (smtp_setup_msg() <= 0) break;
5253 if (!receive_msg(FALSE)) break;
5254
5255 return_path = sender_address = NULL;
5256 dnslist_domain = dnslist_matched = NULL;
5257 #ifndef DISABLE_DKIM
5258 dkim_cur_signer = NULL;
5259 #endif
5260 acl_var_m = NULL;
5261 deliver_localpart_orig = NULL;
5262 deliver_domain_orig = NULL;
5263 callout_address = sending_ip_address = NULL;
5264 deliver_localpart_data = deliver_domain_data =
5265 recipient_data = sender_data = NULL;
5266 sender_rate = sender_rate_limit = sender_rate_period = NULL;
5267 }
5268 smtp_log_no_mail();
5269 }
5270 exim_exit(EXIT_SUCCESS);
5271 }
5272
5273
5274 /* Arrange for message reception if recipients or SMTP were specified;
5275 otherwise complain unless a version print (-bV) happened or this is a filter
5276 verification test or info dump.
5277 In the former case, show the configuration file name. */
5278
5279 if (recipients_arg >= argc && !extract_recipients && !smtp_input)
5280 {
5281 if (version_printed)
5282 {
5283 if (Ustrchr(config_main_filelist, ':'))
5284 printf("Configuration file search path is %s\n", config_main_filelist);
5285 printf("Configuration file is %s\n", config_main_filename);
5286 return EXIT_SUCCESS;
5287 }
5288
5289 if (info_flag != CMDINFO_NONE)
5290 {
5291 show_exim_information(info_flag, info_stdout ? stdout : stderr);
5292 return info_stdout ? EXIT_SUCCESS : EXIT_FAILURE;
5293 }
5294
5295 if (filter_test == FTEST_NONE)
5296 exim_usage(called_as);
5297 }
5298
5299
5300 /* If mua_wrapper is set, Exim is being used to turn an MUA that submits on the
5301 standard input into an MUA that submits to a smarthost over TCP/IP. We know
5302 that we are not called from inetd, because that is rejected above. The
5303 following configuration settings are forced here:
5304
5305 (1) Synchronous delivery (-odi)
5306 (2) Errors to stderr (-oep == -oeq)
5307 (3) No parallel remote delivery
5308 (4) Unprivileged delivery
5309
5310 We don't force overall queueing options because there are several of them;
5311 instead, queueing is avoided below when mua_wrapper is set. However, we do need
5312 to override any SMTP queueing. */
5313
5314 if (mua_wrapper)
5315 {
5316 f.synchronous_delivery = TRUE;
5317 arg_error_handling = ERRORS_STDERR;
5318 remote_max_parallel = 1;
5319 deliver_drop_privilege = TRUE;
5320 f.queue_smtp = FALSE;
5321 queue_smtp_domains = NULL;
5322 #ifdef SUPPORT_I18N
5323 message_utf8_downconvert = -1; /* convert-if-needed */
5324 #endif
5325 }
5326
5327
5328 /* Prepare to accept one or more new messages on the standard input. When a
5329 message has been read, its id is returned in message_id[]. If doing immediate
5330 delivery, we fork a delivery process for each received message, except for the
5331 last one, where we can save a process switch.
5332
5333 It is only in non-smtp mode that error_handling is allowed to be changed from
5334 its default of ERRORS_SENDER by argument. (Idle thought: are any of the
5335 sendmail error modes other than -oem ever actually used? Later: yes.) */
5336
5337 if (!smtp_input) error_handling = arg_error_handling;
5338
5339 /* If this is an inetd call, ensure that stderr is closed to prevent panic
5340 logging being sent down the socket and make an identd call to get the
5341 sender_ident. */
5342
5343 else if (f.is_inetd)
5344 {
5345 (void)fclose(stderr);
5346 exim_nullstd(); /* Re-open to /dev/null */
5347 verify_get_ident(IDENT_PORT);
5348 host_build_sender_fullhost();
5349 set_process_info("handling incoming connection from %s via inetd",
5350 sender_fullhost);
5351 }
5352
5353 /* If the sender host address has been set, build sender_fullhost if it hasn't
5354 already been done (which it will have been for inetd). This caters for the
5355 case when it is forced by -oMa. However, we must flag that it isn't a socket,
5356 so that the test for IP options is skipped for -bs input. */
5357
5358 if (sender_host_address && !sender_fullhost)
5359 {
5360 host_build_sender_fullhost();
5361 set_process_info("handling incoming connection from %s via -oMa",
5362 sender_fullhost);
5363 f.sender_host_notsocket = TRUE;
5364 }
5365
5366 /* Otherwise, set the sender host as unknown except for inetd calls. This
5367 prevents host checking in the case of -bs not from inetd and also for -bS. */
5368
5369 else if (!f.is_inetd) f.sender_host_unknown = TRUE;
5370
5371 /* If stdout does not exist, then dup stdin to stdout. This can happen
5372 if exim is started from inetd. In this case fd 0 will be set to the socket,
5373 but fd 1 will not be set. This also happens for passed SMTP channels. */
5374
5375 if (fstat(1, &statbuf) < 0) (void)dup2(0, 1);
5376
5377 /* Set up the incoming protocol name and the state of the program. Root is
5378 allowed to force received protocol via the -oMr option above. If we have come
5379 via inetd, the process info has already been set up. We don't set
5380 received_protocol here for smtp input, as it varies according to
5381 batch/HELO/EHLO/AUTH/TLS. */
5382
5383 if (smtp_input)
5384 {
5385 if (!f.is_inetd) set_process_info("accepting a local %sSMTP message from <%s>",
5386 smtp_batched_input? "batched " : "",
5387 sender_address ? sender_address : originator_login);
5388 }
5389 else
5390 {
5391 int old_pool = store_pool;
5392 store_pool = POOL_PERM;
5393 if (!received_protocol)
5394 received_protocol = string_sprintf("local%s", called_as);
5395 store_pool = old_pool;
5396 set_process_info("accepting a local non-SMTP message from <%s>",
5397 sender_address);
5398 }
5399
5400 /* Initialize the session_local_queue-only flag (this will be ignored if
5401 mua_wrapper is set) */
5402
5403 queue_check_only();
5404 session_local_queue_only = queue_only;
5405
5406 /* For non-SMTP and for batched SMTP input, check that there is enough space on
5407 the spool if so configured. On failure, we must not attempt to send an error
5408 message! (For interactive SMTP, the check happens at MAIL FROM and an SMTP
5409 error code is given.) */
5410
5411 if ((!smtp_input || smtp_batched_input) && !receive_check_fs(0))
5412 exim_fail("exim: insufficient disk space\n");
5413
5414 /* If this is smtp input of any kind, real or batched, handle the start of the
5415 SMTP session.
5416
5417 NOTE: We do *not* call smtp_log_no_mail() if smtp_start_session() fails,
5418 because a log line has already been written for all its failure exists
5419 (usually "connection refused: <reason>") and writing another one is
5420 unnecessary clutter. */
5421
5422 if (smtp_input)
5423 {
5424 smtp_in = stdin;
5425 smtp_out = stdout;
5426 memset(sender_host_cache, 0, sizeof(sender_host_cache));
5427 if (verify_check_host(&hosts_connection_nolog) == OK)
5428 BIT_CLEAR(log_selector, log_selector_size, Li_smtp_connection);
5429 log_write(L_smtp_connection, LOG_MAIN, "%s", smtp_get_connection_info());
5430 if (!smtp_start_session())
5431 {
5432 mac_smtp_fflush();
5433 exim_exit(EXIT_SUCCESS);
5434 }
5435 }
5436
5437 /* Otherwise, set up the input size limit here and set no stdin stdio buffer
5438 (we handle buferring so as to have visibility of fill level). */
5439
5440 else
5441 {
5442 thismessage_size_limit = expand_string_integer(message_size_limit, TRUE);
5443 if (expand_string_message)
5444 if (thismessage_size_limit == -1)
5445 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to expand "
5446 "message_size_limit: %s", expand_string_message);
5447 else
5448 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "invalid value for "
5449 "message_size_limit: %s", expand_string_message);
5450
5451 setvbuf(stdin, NULL, _IONBF, 0);
5452 }
5453
5454 /* Loop for several messages when reading SMTP input. If we fork any child
5455 processes, we don't want to wait for them unless synchronous delivery is
5456 requested, so set SIGCHLD to SIG_IGN in that case. This is not necessarily the
5457 same as SIG_DFL, despite the fact that documentation often lists the default as
5458 "ignore". This is a confusing area. This is what I know:
5459
5460 At least on some systems (e.g. Solaris), just setting SIG_IGN causes child
5461 processes that complete simply to go away without ever becoming defunct. You
5462 can't then wait for them - but we don't want to wait for them in the
5463 non-synchronous delivery case. However, this behaviour of SIG_IGN doesn't
5464 happen for all OS (e.g. *BSD is different).
5465
5466 But that's not the end of the story. Some (many? all?) systems have the
5467 SA_NOCLDWAIT option for sigaction(). This requests the behaviour that Solaris
5468 has by default, so it seems that the difference is merely one of default
5469 (compare restarting vs non-restarting signals).
5470
5471 To cover all cases, Exim sets SIG_IGN with SA_NOCLDWAIT here if it can. If not,
5472 it just sets SIG_IGN. To be on the safe side it also calls waitpid() at the end
5473 of the loop below. Paranoia rules.
5474
5475 February 2003: That's *still* not the end of the story. There are now versions
5476 of Linux (where SIG_IGN does work) that are picky. If, having set SIG_IGN, a
5477 process then calls waitpid(), a grumble is written to the system log, because
5478 this is logically inconsistent. In other words, it doesn't like the paranoia.
5479 As a consequence of this, the waitpid() below is now excluded if we are sure
5480 that SIG_IGN works. */
5481
5482 if (!f.synchronous_delivery)
5483 {
5484 #ifdef SA_NOCLDWAIT
5485 struct sigaction act;
5486 act.sa_handler = SIG_IGN;
5487 sigemptyset(&(act.sa_mask));
5488 act.sa_flags = SA_NOCLDWAIT;
5489 sigaction(SIGCHLD, &act, NULL);
5490 #else
5491 signal(SIGCHLD, SIG_IGN);
5492 #endif
5493 }
5494
5495 /* Save the current store pool point, for resetting at the start of
5496 each message, and save the real sender address, if any. */
5497
5498 real_sender_address = sender_address;
5499
5500 /* Loop to receive messages; receive_msg() returns TRUE if there are more
5501 messages to be read (SMTP input), or FALSE otherwise (not SMTP, or SMTP channel
5502 collapsed). */
5503
5504 while (more)
5505 {
5506 rmark reset_point = store_mark();
5507 message_id[0] = 0;
5508
5509 /* Handle the SMTP case; call smtp_setup_mst() to deal with the initial SMTP
5510 input and build the recipients list, before calling receive_msg() to read the
5511 message proper. Whatever sender address is given in the SMTP transaction is
5512 often ignored for local senders - we use the actual sender, which is normally
5513 either the underlying user running this process or a -f argument provided by
5514 a trusted caller. It is saved in real_sender_address. The test for whether to
5515 accept the SMTP sender is encapsulated in receive_check_set_sender(). */
5516
5517 if (smtp_input)
5518 {
5519 int rc;
5520 if ((rc = smtp_setup_msg()) > 0)
5521 {
5522 if (real_sender_address != NULL &&
5523 !receive_check_set_sender(sender_address))
5524 {
5525 sender_address = raw_sender = real_sender_address;
5526 sender_address_unrewritten = NULL;
5527 }
5528
5529 /* For batched SMTP, we have to run the acl_not_smtp_start ACL, since it
5530 isn't really SMTP, so no other ACL will run until the acl_not_smtp one at
5531 the very end. The result of the ACL is ignored (as for other non-SMTP
5532 messages). It is run for its potential side effects. */
5533
5534 if (smtp_batched_input && acl_not_smtp_start != NULL)
5535 {
5536 uschar *user_msg, *log_msg;
5537 f.enable_dollar_recipients = TRUE;
5538 (void)acl_check(ACL_WHERE_NOTSMTP_START, NULL, acl_not_smtp_start,
5539 &user_msg, &log_msg);
5540 f.enable_dollar_recipients = FALSE;
5541 }
5542
5543 /* Now get the data for the message */
5544
5545 more = receive_msg(extract_recipients);
5546 if (message_id[0] == 0)
5547 {
5548 cancel_cutthrough_connection(TRUE, US"receive dropped");
5549 if (more) goto moreloop;
5550 smtp_log_no_mail(); /* Log no mail if configured */
5551 exim_exit(EXIT_FAILURE);
5552 }
5553 }
5554 else
5555 {
5556 cancel_cutthrough_connection(TRUE, US"message setup dropped");
5557 smtp_log_no_mail(); /* Log no mail if configured */
5558 exim_exit(rc ? EXIT_FAILURE : EXIT_SUCCESS);
5559 }
5560 }
5561
5562 /* In the non-SMTP case, we have all the information from the command
5563 line, but must process it in case it is in the more general RFC822
5564 format, and in any case, to detect syntax errors. Also, it appears that
5565 the use of comma-separated lists as single arguments is common, so we
5566 had better support them. */
5567
5568 else
5569 {
5570 int rcount = 0;
5571 int count = argc - recipients_arg;
5572 uschar **list = argv + recipients_arg;
5573
5574 /* These options cannot be changed dynamically for non-SMTP messages */
5575
5576 f.active_local_sender_retain = local_sender_retain;
5577 f.active_local_from_check = local_from_check;
5578
5579 /* Save before any rewriting */
5580
5581 raw_sender = string_copy(sender_address);
5582
5583 /* Loop for each argument (supplied by user hence tainted) */
5584
5585 for (int i = 0; i < count; i++)
5586 {
5587 int start, end, domain;
5588 uschar * errmess;
5589 /* There can be multiple addresses, so EXIM_DISPLAYMAIL_MAX (tuned for 1) is too short.
5590 * We'll still want to cap it to something, just in case. */
5591 uschar * s = string_copy_taint(exim_str_fail_toolong(list[i], BIG_BUFFER_SIZE, "address argument"), TRUE);
5592
5593 /* Loop for each comma-separated address */
5594
5595 while (*s != 0)
5596 {
5597 BOOL finished = FALSE;
5598 uschar *recipient;
5599 uschar *ss = parse_find_address_end(s, FALSE);
5600
5601 if (*ss == ',') *ss = 0; else finished = TRUE;
5602
5603 /* Check max recipients - if -t was used, these aren't recipients */
5604
5605 if (recipients_max > 0 && ++rcount > recipients_max &&
5606 !extract_recipients)
5607 if (error_handling == ERRORS_STDERR)
5608 {
5609 fprintf(stderr, "exim: too many recipients\n");
5610 exim_exit(EXIT_FAILURE);
5611 }
5612 else
5613 return
5614 moan_to_sender(ERRMESS_TOOMANYRECIP, NULL, NULL, stdin, TRUE)?
5615 errors_sender_rc : EXIT_FAILURE;
5616
5617 #ifdef SUPPORT_I18N
5618 {
5619 BOOL b = allow_utf8_domains;
5620 allow_utf8_domains = TRUE;
5621 #endif
5622 recipient =
5623 parse_extract_address(s, &errmess, &start, &end, &domain, FALSE);
5624
5625 #ifdef SUPPORT_I18N
5626 if (recipient)
5627 if (string_is_utf8(recipient)) message_smtputf8 = TRUE;
5628 else allow_utf8_domains = b;
5629 }
5630 #else
5631 ;
5632 #endif
5633 if (domain == 0 && !f.allow_unqualified_recipient)
5634 {
5635 recipient = NULL;
5636 errmess = US"unqualified recipient address not allowed";
5637 }
5638
5639 if (!recipient)
5640 if (error_handling == ERRORS_STDERR)
5641 {
5642 fprintf(stderr, "exim: bad recipient address \"%s\": %s\n",
5643 string_printing(list[i]), errmess);
5644 exim_exit(EXIT_FAILURE);
5645 }
5646 else
5647 {
5648 error_block eblock;
5649 eblock.next = NULL;
5650 eblock.text1 = string_printing(list[i]);
5651 eblock.text2 = errmess;
5652 return
5653 moan_to_sender(ERRMESS_BADARGADDRESS, &eblock, NULL, stdin, TRUE)?
5654 errors_sender_rc : EXIT_FAILURE;
5655 }
5656
5657 receive_add_recipient(string_copy_taint(recipient, TRUE), -1);
5658 s = ss;
5659 if (!finished)
5660 while (*(++s) != 0 && (*s == ',' || isspace(*s)));
5661 }
5662 }
5663
5664 /* Show the recipients when debugging */
5665
5666 DEBUG(D_receive)
5667 {
5668 if (sender_address) debug_printf("Sender: %s\n", sender_address);
5669 if (recipients_list)
5670 {
5671 debug_printf("Recipients:\n");
5672 for (int i = 0; i < recipients_count; i++)
5673 debug_printf(" %s\n", recipients_list[i].address);
5674 }
5675 }
5676
5677 /* Run the acl_not_smtp_start ACL if required. The result of the ACL is
5678 ignored; rejecting here would just add complication, and it can just as
5679 well be done later. Allow $recipients to be visible in the ACL. */
5680
5681 if (acl_not_smtp_start)
5682 {
5683 uschar *user_msg, *log_msg;
5684 f.enable_dollar_recipients = TRUE;
5685 (void)acl_check(ACL_WHERE_NOTSMTP_START, NULL, acl_not_smtp_start,
5686 &user_msg, &log_msg);
5687 f.enable_dollar_recipients = FALSE;
5688 }
5689
5690 /* Pause for a while waiting for input. If none received in that time,
5691 close the logfile, if we had one open; then if we wait for a long-running
5692 datasource (months, in one use-case) log rotation will not leave us holding
5693 the file copy. */
5694
5695 if (!receive_timeout)
5696 if (poll_one_fd(0, POLLIN, 30*60*1000) == 0) /* 30 minutes */
5697 mainlog_close();
5698
5699 /* Read the data for the message. If filter_test is not FTEST_NONE, this
5700 will just read the headers for the message, and not write anything onto the
5701 spool. */
5702
5703 message_ended = END_NOTENDED;
5704 more = receive_msg(extract_recipients);
5705
5706 /* more is always FALSE here (not SMTP message) when reading a message
5707 for real; when reading the headers of a message for filter testing,
5708 it is TRUE if the headers were terminated by '.' and FALSE otherwise. */
5709
5710 if (message_id[0] == 0) exim_exit(EXIT_FAILURE);
5711 } /* Non-SMTP message reception */
5712
5713 /* If this is a filter testing run, there are headers in store, but
5714 no message on the spool. Run the filtering code in testing mode, setting
5715 the domain to the qualify domain and the local part to the current user,
5716 unless they have been set by options. The prefix and suffix are left unset
5717 unless specified. The the return path is set to to the sender unless it has
5718 already been set from a return-path header in the message. */
5719
5720 if (filter_test != FTEST_NONE)
5721 {
5722 deliver_domain = ftest_domain ? ftest_domain : qualify_domain_recipient;
5723 deliver_domain_orig = deliver_domain;
5724 deliver_localpart = ftest_localpart ? US ftest_localpart : originator_login;
5725 deliver_localpart_orig = deliver_localpart;
5726 deliver_localpart_prefix = US ftest_prefix;
5727 deliver_localpart_suffix = US ftest_suffix;
5728 deliver_home = originator_home;
5729
5730 if (!return_path)
5731 {
5732 printf("Return-path copied from sender\n");
5733 return_path = string_copy(sender_address);
5734 }
5735 else
5736 printf("Return-path = %s\n", (return_path[0] == 0)? US"<>" : return_path);
5737 printf("Sender = %s\n", (sender_address[0] == 0)? US"<>" : sender_address);
5738
5739 receive_add_recipient(
5740 string_sprintf("%s%s%s@%s",
5741 ftest_prefix ? ftest_prefix : US"",
5742 deliver_localpart,
5743 ftest_suffix ? ftest_suffix : US"",
5744 deliver_domain), -1);
5745
5746 printf("Recipient = %s\n", recipients_list[0].address);
5747 if (ftest_prefix) printf("Prefix = %s\n", ftest_prefix);
5748 if (ftest_suffix) printf("Suffix = %s\n", ftest_suffix);
5749
5750 if (chdir("/")) /* Get away from wherever the user is running this from */
5751 {
5752 DEBUG(D_receive) debug_printf("chdir(\"/\") failed\n");
5753 exim_exit(EXIT_FAILURE);
5754 }
5755
5756 /* Now we run either a system filter test, or a user filter test, or both.
5757 In the latter case, headers added by the system filter will persist and be
5758 available to the user filter. We need to copy the filter variables
5759 explicitly. */
5760
5761 if (filter_test & FTEST_SYSTEM)
5762 if (!filter_runtest(filter_sfd, filter_test_sfile, TRUE, more))
5763 exim_exit(EXIT_FAILURE);
5764
5765 memcpy(filter_sn, filter_n, sizeof(filter_sn));
5766
5767 if (filter_test & FTEST_USER)
5768 if (!filter_runtest(filter_ufd, filter_test_ufile, FALSE, more))
5769 exim_exit(EXIT_FAILURE);
5770
5771 exim_exit(EXIT_SUCCESS);
5772 }
5773
5774 /* Else act on the result of message reception. We should not get here unless
5775 message_id[0] is non-zero. If queue_only is set, session_local_queue_only
5776 will be TRUE. If it is not, check on the number of messages received in this
5777 connection. */
5778
5779 if ( !session_local_queue_only
5780 && smtp_accept_queue_per_connection > 0
5781 && receive_messagecount > smtp_accept_queue_per_connection)
5782 {
5783 session_local_queue_only = TRUE;
5784 queue_only_reason = 2;
5785 }
5786
5787 /* Initialize local_queue_only from session_local_queue_only. If it is false,
5788 and queue_only_load is set, check that the load average is below it. If it is
5789 not, set local_queue_only TRUE. If queue_only_load_latch is true (the
5790 default), we put the whole session into queue_only mode. It then remains this
5791 way for any subsequent messages on the same SMTP connection. This is a
5792 deliberate choice; even though the load average may fall, it doesn't seem
5793 right to deliver later messages on the same call when not delivering earlier
5794 ones. However, there are odd cases where this is not wanted, so this can be
5795 changed by setting queue_only_load_latch false. */
5796
5797 if (!(local_queue_only = session_local_queue_only) && queue_only_load >= 0)
5798 if ((local_queue_only = (load_average = OS_GETLOADAVG()) > queue_only_load))
5799 {
5800 queue_only_reason = 3;
5801 if (queue_only_load_latch) session_local_queue_only = TRUE;
5802 }
5803
5804 /* If running as an MUA wrapper, all queueing options and freezing options
5805 are ignored. */
5806
5807 if (mua_wrapper)
5808 local_queue_only = f.queue_only_policy = f.deliver_freeze = FALSE;
5809
5810 /* Log the queueing here, when it will get a message id attached, but
5811 not if queue_only is set (case 0). Case 1 doesn't happen here (too many
5812 connections). */
5813
5814 if (local_queue_only)
5815 {
5816 cancel_cutthrough_connection(TRUE, US"no delivery; queueing");
5817 switch(queue_only_reason)
5818 {
5819 case 2:
5820 log_write(L_delay_delivery,
5821 LOG_MAIN, "no immediate delivery: more than %d messages "
5822 "received in one connection", smtp_accept_queue_per_connection);
5823 break;
5824
5825 case 3:
5826 log_write(L_delay_delivery,
5827 LOG_MAIN, "no immediate delivery: load average %.2f",
5828 (double)load_average/1000.0);
5829 break;
5830 }
5831 }
5832
5833 else if (f.queue_only_policy || f.deliver_freeze)
5834 cancel_cutthrough_connection(TRUE, US"no delivery; queueing");
5835
5836 /* Else do the delivery unless the ACL or local_scan() called for queue only
5837 or froze the message. Always deliver in a separate process. A fork failure is
5838 not a disaster, as the delivery will eventually happen on a subsequent queue
5839 run. The search cache must be tidied before the fork, as the parent will
5840 do it before exiting. The child will trigger a lookup failure and
5841 thereby defer the delivery if it tries to use (for example) a cached ldap
5842 connection that the parent has called unbind on. */
5843
5844 else
5845 {
5846 pid_t pid;
5847 search_tidyup();
5848
5849 if ((pid = exim_fork(US"local-accept-delivery")) == 0)
5850 {
5851 int rc;
5852 close_unwanted(); /* Close unwanted file descriptors and TLS */
5853 exim_nullstd(); /* Ensure std{in,out,err} exist */
5854
5855 /* Re-exec Exim if we need to regain privilege (note: in mua_wrapper
5856 mode, deliver_drop_privilege is forced TRUE). */
5857
5858 if (geteuid() != root_uid && !deliver_drop_privilege && !unprivileged)
5859 {
5860 delivery_re_exec(CEE_EXEC_EXIT);
5861 /* Control does not return here. */
5862 }
5863
5864 /* No need to re-exec */
5865
5866 rc = deliver_message(message_id, FALSE, FALSE);
5867 search_tidyup();
5868 exim_underbar_exit(!mua_wrapper || rc == DELIVER_MUA_SUCCEEDED
5869 ? EXIT_SUCCESS : EXIT_FAILURE);
5870 }
5871
5872 if (pid < 0)
5873 {
5874 cancel_cutthrough_connection(TRUE, US"delivery fork failed");
5875 log_write(0, LOG_MAIN|LOG_PANIC, "failed to fork automatic delivery "
5876 "process: %s", strerror(errno));
5877 }
5878 else
5879 {
5880 release_cutthrough_connection(US"msg passed for delivery");
5881
5882 /* In the parent, wait if synchronous delivery is required. This will
5883 always be the case in MUA wrapper mode. */
5884
5885 if (f.synchronous_delivery)
5886 {
5887 int status;
5888 while (wait(&status) != pid);
5889 if ((status & 0x00ff) != 0)
5890 log_write(0, LOG_MAIN|LOG_PANIC,
5891 "process %d crashed with signal %d while delivering %s",
5892 (int)pid, status & 0x00ff, message_id);
5893 if (mua_wrapper && (status & 0xffff) != 0) exim_exit(EXIT_FAILURE);
5894 }
5895 }
5896 }
5897
5898 /* The loop will repeat if more is TRUE. If we do not know know that the OS
5899 automatically reaps children (see comments above the loop), clear away any
5900 finished subprocesses here, in case there are lots of messages coming in
5901 from the same source. */
5902
5903 #ifndef SIG_IGN_WORKS
5904 while (waitpid(-1, NULL, WNOHANG) > 0);
5905 #endif
5906
5907 moreloop:
5908 return_path = sender_address = NULL;
5909 authenticated_sender = NULL;
5910 deliver_localpart_orig = NULL;
5911 deliver_domain_orig = NULL;
5912 deliver_host = deliver_host_address = NULL;
5913 dnslist_domain = dnslist_matched = NULL;
5914 #ifdef WITH_CONTENT_SCAN
5915 malware_name = NULL;
5916 #endif
5917 callout_address = NULL;
5918 sending_ip_address = NULL;
5919 deliver_localpart_data = deliver_domain_data =
5920 recipient_data = sender_data = NULL;
5921 acl_var_m = NULL;
5922 for(int i = 0; i < REGEX_VARS; i++) regex_vars[i] = NULL;
5923
5924 store_reset(reset_point);
5925 }
5926
5927 exim_exit(EXIT_SUCCESS); /* Never returns */
5928 return 0; /* To stop compiler warning */
5929 }
5930
5931
5932 /* End of exim.c */
5933