1 /*************************************************
2 * Exim - an Internet mail transport agent *
3 *************************************************/
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. */
10 /* The main function: entry point, initialization, and high-level control.
11 Also a few functions that don't naturally fit elsewhere. */
16 #if defined(__GLIBC__) && !defined(__UCLIBC__)
17 # include <gnu/libc-version.h>
21 # include <gnutls/gnutls.h>
22 # if GNUTLS_VERSION_NUMBER < 0x030103 && !defined(DISABLE_OCSP)
31 extern void init_lookup_list(void);
35 /*************************************************
36 * Function interface to store functions *
37 *************************************************/
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. */
48 function_store_get(PCRE2_SIZE size, void * tag)
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);
56 function_dummy_free(void * block, void * tag) {}
59 function_store_malloc(PCRE2_SIZE size, void * tag)
61 return store_malloc((int)size);
65 function_store_free(void * block, void * tag)
73 /*************************************************
74 * Enums for cmdline interface *
75 *************************************************/
77 enum commandline_info { CMDINFO_NONE=0,
78 CMDINFO_HELP, CMDINFO_SIEVE, CMDINFO_DSCP };
83 /*************************************************
84 * Compile regular expression and panic on fail *
85 *************************************************/
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.
94 pattern the pattern to compile
95 caseless TRUE if caseless matching is required
96 use_malloc TRUE if compile into malloc store
98 Returns: pointer to the compiled pattern
102 regex_must_compile(const uschar * pattern, BOOL caseless, BOOL use_malloc)
105 int options = caseless ? PCRE_COPT|PCRE2_CASELESS : PCRE_COPT;
106 const pcre2_code * yield;
108 pcre2_general_context * gctx;
109 pcre2_compile_context * cctx;
113 gctx = pcre2_general_context_create(function_store_malloc, function_store_free, NULL);
114 cctx = pcre2_compile_context_create(gctx);
119 if (!(yield = pcre2_compile((PCRE2_SPTR)pattern, PCRE2_ZERO_TERMINATED, options,
120 &err, &offset, cctx)))
123 pcre2_get_error_message(err, errbuf, sizeof(errbuf));
124 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "regular expression error: "
125 "%s at offset %d while compiling %s", errbuf, (long)offset, pattern);
130 pcre2_compile_context_free(cctx);
131 pcre2_general_context_free(gctx);
140 pcre_gen_ctx = pcre2_general_context_create(function_store_malloc, function_store_free, NULL);
141 pcre_cmp_ctx = pcre2_compile_context_create(pcre_gen_ctx);
142 pcre_mtc_ctx = pcre2_match_context_create(pcre_gen_ctx);
148 /*************************************************
149 * Execute regular expression and set strings *
150 *************************************************/
152 /* This function runs a regular expression match, and sets up the pointers to
153 the matched substrings. The matched strings are copied.
155 We might consider tracing the uses of expand_nstring to see if consitification
156 is viable, and save the copy cost by just using the pointers into the subject string.
157 Pre-pcre2 we did that without noticing, so it might just work - or might have been
158 a bug. It was certainly a risk in the implemenation.
161 re the compiled expression
162 subject the subject string
163 options additional PCRE options
164 setup if < 0 do full setup
165 if >= 0 setup from setup+1 onwards,
166 excluding the full matched string
168 Returns: TRUE if matched, or FALSE
172 regex_match_and_setup(const pcre2_code * re, const uschar * subject, int options, int setup)
174 pcre2_match_data * md = pcre2_match_data_create_from_pattern(re, pcre_gen_ctx);
175 int res = pcre2_match(re, (PCRE2_SPTR)subject, PCRE2_ZERO_TERMINATED, 0,
176 PCRE_EOPT | options, md, pcre_mtc_ctx);
179 if ((yield = (res >= 0)))
181 res = pcre2_get_ovector_count(md);
182 expand_nmax = setup < 0 ? 0 : setup + 1;
183 for (int matchnum = setup < 0 ? 0 : 1; matchnum < res; matchnum++)
186 pcre2_substring_get_bynumber(md, matchnum,
187 (PCRE2_UCHAR **)&expand_nstring[expand_nmax], &len);
188 expand_nlength[expand_nmax++] = (int)len;
192 else if (res != PCRE2_ERROR_NOMATCH) DEBUG(D_any)
195 pcre2_get_error_message(res, errbuf, sizeof(errbuf));
196 debug_printf_indent("pcre2: %s\n", errbuf);
198 pcre2_match_data_free(md);
203 /* Check just for match with regex. Uses the common memory-handling.
207 subject string to be checked
208 slen length of subject; -1 for nul-terminated
209 rptr pointer for matched string, copied, or NULL
211 Return: TRUE for a match.
215 regex_match(const pcre2_code * re, const uschar * subject, int slen, uschar ** rptr)
217 pcre2_match_data * md = pcre2_match_data_create(1, pcre_gen_ctx);
218 int rc = pcre2_match(re, (PCRE2_SPTR)subject,
219 slen >= 0 ? slen : PCRE2_ZERO_TERMINATED,
220 0, PCRE_EOPT, md, pcre_mtc_ctx);
221 PCRE2_SIZE * ovec = pcre2_get_ovector_pointer(md);
225 *rptr = string_copyn(subject + ovec[0], ovec[1] - ovec[0]);
231 /*************************************************
232 * Set up processing details *
233 *************************************************/
235 /* Save a text string for dumping when SIGUSR1 is received.
236 Do checks for overruns.
238 Arguments: format and arguments, as for printf()
243 set_process_info(const char *format, ...)
245 gstring gs = { .size = PROCESS_INFO_SIZE - 2, .ptr = 0, .s = process_info };
250 g = string_fmt_append(&gs, "%5d ", (int)getpid());
252 va_start(ap, format);
253 if (!string_vformat(g, 0, format, ap))
256 g = string_cat(&gs, US"**** string overflowed buffer ****");
258 g = string_catn(g, US"\n", 1);
259 string_from_gstring(g);
260 process_info_len = g->ptr;
261 DEBUG(D_process_info) debug_printf("set_process_info: %s", process_info);
265 /***********************************************
266 * Handler for SIGTERM *
267 ***********************************************/
270 term_handler(int sig)
276 /***********************************************
277 * Handler for SIGSEGV *
278 ***********************************************/
281 segv_handler(int sig)
283 log_write(0, LOG_MAIN|LOG_PANIC, "SIGSEGV (maybe attempt to write to immutable memory)");
284 signal(SIGSEGV, SIG_DFL);
289 /*************************************************
290 * Handler for SIGUSR1 *
291 *************************************************/
293 /* SIGUSR1 causes any exim process to write to the process log details of
294 what it is currently doing. It will only be used if the OS is capable of
295 setting up a handler that causes automatic restarting of any system call
296 that is in progress at the time.
298 This function takes care to be signal-safe.
300 Argument: the signal number (SIGUSR1)
305 usr1_handler(int sig)
309 os_restarting_signal(sig, usr1_handler);
311 if (!process_log_path) return;
312 fd = log_open_as_exim(process_log_path);
314 /* If we are neither exim nor root, or if we failed to create the log file,
315 give up. There is not much useful we can do with errors, since we don't want
316 to disrupt whatever is going on outside the signal handler. */
320 (void)write(fd, process_info, process_info_len);
326 /*************************************************
328 *************************************************/
330 /* This handler is enabled most of the time that Exim is running. The handler
331 doesn't actually get used unless alarm() has been called to set a timer, to
332 place a time limit on a system call of some kind. When the handler is run, it
335 There are some other SIGALRM handlers that are used in special cases when more
336 than just a flag setting is required; for example, when reading a message's
337 input. These are normally set up in the code module that uses them, and the
338 SIGALRM handler is reset to this one afterwards.
340 Argument: the signal value (SIGALRM)
345 sigalrm_handler(int sig)
348 os_non_restarting_signal(SIGALRM, sigalrm_handler);
353 /*************************************************
354 * Sleep for a fractional time interval *
355 *************************************************/
357 /* This function is called by millisleep() and exim_wait_tick() to wait for a
358 period of time that may include a fraction of a second. The coding is somewhat
359 tedious. We do not expect setitimer() ever to fail, but if it does, the process
360 will wait for ever, so we panic in this instance. (There was a case of this
361 when a bug in a function that calls milliwait() caused it to pass invalid data.
362 That's when I added the check. :-)
364 We assume it to be not worth sleeping for under 50us; this value will
365 require revisiting as hardware advances. This avoids the issue of
366 a zero-valued timer setting meaning "never fire".
368 Argument: an itimerval structure containing the interval
373 milliwait(struct itimerval *itval)
376 sigset_t old_sigmask;
377 int save_errno = errno;
379 if (itval->it_value.tv_usec < 50 && itval->it_value.tv_sec == 0)
381 (void)sigemptyset(&sigmask); /* Empty mask */
382 (void)sigaddset(&sigmask, SIGALRM); /* Add SIGALRM */
383 (void)sigprocmask(SIG_BLOCK, &sigmask, &old_sigmask); /* Block SIGALRM */
384 if (setitimer(ITIMER_REAL, itval, NULL) < 0) /* Start timer */
385 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
386 "setitimer() failed: %s", strerror(errno));
387 (void)sigfillset(&sigmask); /* All signals */
388 (void)sigdelset(&sigmask, SIGALRM); /* Remove SIGALRM */
389 (void)sigsuspend(&sigmask); /* Until SIGALRM */
390 (void)sigprocmask(SIG_SETMASK, &old_sigmask, NULL); /* Restore mask */
392 sigalrm_seen = FALSE;
398 /*************************************************
399 * Millisecond sleep function *
400 *************************************************/
402 /* The basic sleep() function has a granularity of 1 second, which is too rough
403 in some cases - for example, when using an increasing delay to slow down
406 Argument: number of millseconds
413 struct itimerval itval = {.it_interval = {.tv_sec = 0, .tv_usec = 0},
414 .it_value = {.tv_sec = msec/1000,
415 .tv_usec = (msec % 1000) * 1000}};
421 /*************************************************
422 * Compare microsecond times *
423 *************************************************/
430 Returns: -1, 0, or +1
434 exim_tvcmp(struct timeval *t1, struct timeval *t2)
436 if (t1->tv_sec > t2->tv_sec) return +1;
437 if (t1->tv_sec < t2->tv_sec) return -1;
438 if (t1->tv_usec > t2->tv_usec) return +1;
439 if (t1->tv_usec < t2->tv_usec) return -1;
446 /*************************************************
447 * Clock tick wait function *
448 *************************************************/
450 #ifdef _POSIX_MONOTONIC_CLOCK
451 # ifdef CLOCK_BOOTTIME
452 # define EXIM_CLOCKTYPE CLOCK_BOOTTIME
454 # define EXIM_CLOCKTYPE CLOCK_MONOTONIC
457 /* Amount EXIM_CLOCK is behind realtime, at startup. */
458 static struct timespec offset_ts;
461 exim_clock_init(void)
464 if (clock_gettime(EXIM_CLOCKTYPE, &offset_ts) != 0) return;
465 (void)gettimeofday(&tv, NULL);
466 offset_ts.tv_sec = tv.tv_sec - offset_ts.tv_sec;
467 offset_ts.tv_nsec = tv.tv_usec * 1000 - offset_ts.tv_nsec;
468 if (offset_ts.tv_nsec >= 0) return;
470 offset_ts.tv_nsec += 1000*1000*1000;
476 exim_gettime(struct timeval * tv)
478 #ifdef _POSIX_MONOTONIC_CLOCK
479 struct timespec now_ts;
481 if (clock_gettime(EXIM_CLOCKTYPE, &now_ts) == 0)
483 now_ts.tv_sec += offset_ts.tv_sec;
484 if ((now_ts.tv_nsec += offset_ts.tv_nsec) >= 1000*1000*1000)
487 now_ts.tv_nsec -= 1000*1000*1000;
489 tv->tv_sec = now_ts.tv_sec;
490 tv->tv_usec = now_ts.tv_nsec / 1000;
494 (void)gettimeofday(tv, NULL);
498 /* Exim uses a time + a pid to generate a unique identifier in two places: its
499 message IDs, and in file names for maildir deliveries. Because some OS now
500 re-use pids within the same second, sub-second times are now being used.
501 However, for absolute certainty, we must ensure the clock has ticked before
502 allowing the relevant process to complete. At the time of implementation of
503 this code (February 2003), the speed of processors is such that the clock will
504 invariably have ticked already by the time a process has done its job. This
505 function prepares for the time when things are faster - and it also copes with
506 clocks that go backwards.
509 prev_tv A timeval which was used to create uniqueness; its usec field
510 has been rounded down to the value of the resolution.
511 We want to be sure the current time is greater than this.
512 On return, updated to current (rounded down).
513 resolution The resolution that was used to divide the microseconds
514 (1 for maildir, larger for message ids)
520 exim_wait_tick(struct timeval * prev_tv, int resolution)
522 struct timeval now_tv;
523 long int now_true_usec;
525 exim_gettime(&now_tv);
526 now_true_usec = now_tv.tv_usec;
527 now_tv.tv_usec = (now_true_usec/resolution) * resolution;
529 while (exim_tvcmp(&now_tv, prev_tv) <= 0)
531 struct itimerval itval;
532 itval.it_interval.tv_sec = 0;
533 itval.it_interval.tv_usec = 0;
534 itval.it_value.tv_sec = prev_tv->tv_sec - now_tv.tv_sec;
535 itval.it_value.tv_usec = prev_tv->tv_usec + resolution - now_true_usec;
537 /* We know that, overall, "now" is less than or equal to "then". Therefore, a
538 negative value for the microseconds is possible only in the case when "now"
539 is more than a second less than "tgt". That means that itval.it_value.tv_sec
540 is greater than zero. The following correction is therefore safe. */
542 if (itval.it_value.tv_usec < 0)
544 itval.it_value.tv_usec += 1000000;
545 itval.it_value.tv_sec -= 1;
548 DEBUG(D_transport|D_receive)
550 if (!f.running_in_test_harness)
552 debug_printf("tick check: " TIME_T_FMT ".%06lu " TIME_T_FMT ".%06lu\n",
553 prev_tv->tv_sec, (long) prev_tv->tv_usec,
554 now_tv.tv_sec, (long) now_tv.tv_usec);
555 debug_printf("waiting " TIME_T_FMT ".%06lu sec\n",
556 itval.it_value.tv_sec, (long) itval.it_value.tv_usec);
562 /* Be prapared to go around if the kernel does not implement subtick
563 granularity (GNU Hurd) */
565 exim_gettime(&now_tv);
566 now_true_usec = now_tv.tv_usec;
567 now_tv.tv_usec = (now_true_usec/resolution) * resolution;
575 /*************************************************
576 * Call fopen() with umask 777 and adjust mode *
577 *************************************************/
579 /* Exim runs with umask(0) so that files created with open() have the mode that
580 is specified in the open() call. However, there are some files, typically in
581 the spool directory, that are created with fopen(). They end up world-writeable
582 if no precautions are taken. Although the spool directory is not accessible to
583 the world, this is an untidiness. So this is a wrapper function for fopen()
584 that sorts out the mode of the created file.
587 filename the file name
588 options the fopen() options
589 mode the required mode
591 Returns: the fopened FILE or NULL
595 modefopen(const uschar *filename, const char *options, mode_t mode)
597 mode_t saved_umask = umask(0777);
598 FILE *f = Ufopen(filename, options);
599 (void)umask(saved_umask);
600 if (f != NULL) (void)fchmod(fileno(f), mode);
605 /*************************************************
606 * Ensure stdin, stdout, and stderr exist *
607 *************************************************/
609 /* Some operating systems grumble if an exec() happens without a standard
610 input, output, and error (fds 0, 1, 2) being defined. The worry is that some
611 file will be opened and will use these fd values, and then some other bit of
612 code will assume, for example, that it can write error messages to stderr.
613 This function ensures that fds 0, 1, and 2 are open if they do not already
614 exist, by connecting them to /dev/null.
616 This function is also used to ensure that std{in,out,err} exist at all times,
617 so that if any library that Exim calls tries to use them, it doesn't crash.
628 for (int i = 0; i <= 2; i++)
630 if (fstat(i, &statbuf) < 0 && errno == EBADF)
632 if (devnull < 0) devnull = open("/dev/null", O_RDWR);
633 if (devnull < 0) log_write(0, LOG_MAIN|LOG_PANIC_DIE, "%s",
634 string_open_failed("/dev/null", NULL));
635 if (devnull != i) (void)dup2(devnull, i);
638 if (devnull > 2) (void)close(devnull);
644 /*************************************************
645 * Close unwanted file descriptors for delivery *
646 *************************************************/
648 /* This function is called from a new process that has been forked to deliver
649 an incoming message, either directly, or using exec.
651 We want any smtp input streams to be closed in this new process. However, it
652 has been observed that using fclose() here causes trouble. When reading in -bS
653 input, duplicate copies of messages have been seen. The files will be sharing a
654 file pointer with the parent process, and it seems that fclose() (at least on
655 some systems - I saw this on Solaris 2.5.1) messes with that file pointer, at
656 least sometimes. Hence we go for closing the underlying file descriptors.
658 If TLS is active, we want to shut down the TLS library, but without molesting
659 the parent's SSL connection.
661 For delivery of a non-SMTP message, we want to close stdin and stdout (and
662 stderr unless debugging) because the calling process might have set them up as
663 pipes and be waiting for them to close before it waits for the submission
664 process to terminate. If they aren't closed, they hold up the calling process
665 until the initial delivery process finishes, which is not what we want.
667 Exception: We do want it for synchronous delivery!
669 And notwithstanding all the above, if D_resolver is set, implying resolver
670 debugging, leave stdout open, because that's where the resolver writes its
673 When we close stderr (which implies we've also closed stdout), we also get rid
674 of any controlling terminal.
686 tls_close(NULL, TLS_NO_SHUTDOWN); /* Shut down the TLS library */
688 (void)close(fileno(smtp_in));
689 (void)close(fileno(smtp_out));
694 (void)close(0); /* stdin */
695 if ((debug_selector & D_resolver) == 0) (void)close(1); /* stdout */
696 if (debug_selector == 0) /* stderr */
698 if (!f.synchronous_delivery)
711 /*************************************************
713 *************************************************/
715 /* This function sets a new uid and gid permanently, optionally calling
716 initgroups() to set auxiliary groups. There are some special cases when running
717 Exim in unprivileged modes. In these situations the effective uid will not be
718 root; if we already have the right effective uid/gid, and don't need to
719 initialize any groups, leave things as they are.
724 igflag TRUE if initgroups() wanted
725 msg text to use in debugging output and failure log
727 Returns: nothing; bombs out on failure
731 exim_setugid(uid_t uid, gid_t gid, BOOL igflag, uschar *msg)
733 uid_t euid = geteuid();
734 gid_t egid = getegid();
736 if (euid == root_uid || euid != uid || egid != gid || igflag)
738 /* At least one OS returns +1 for initgroups failure, so just check for
743 struct passwd *pw = getpwuid(uid);
745 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "cannot run initgroups(): "
746 "no passwd entry for uid=%ld", (long int)uid);
748 if (initgroups(pw->pw_name, gid) != 0)
749 log_write(0,LOG_MAIN|LOG_PANIC_DIE,"initgroups failed for uid=%ld: %s",
750 (long int)uid, strerror(errno));
753 if (setgid(gid) < 0 || setuid(uid) < 0)
754 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "unable to set gid=%ld or uid=%ld "
755 "(euid=%ld): %s", (long int)gid, (long int)uid, (long int)euid, msg);
758 /* Debugging output included uid/gid and all groups */
762 int group_count, save_errno;
763 gid_t group_list[EXIM_GROUPLIST_SIZE];
764 debug_printf("changed uid/gid: %s\n uid=%ld gid=%ld pid=%ld\n", msg,
765 (long int)geteuid(), (long int)getegid(), (long int)getpid());
766 group_count = getgroups(nelem(group_list), group_list);
768 debug_printf(" auxiliary group list:");
770 for (int i = 0; i < group_count; i++) debug_printf(" %d", (int)group_list[i]);
771 else if (group_count < 0)
772 debug_printf(" <error: %s>", strerror(save_errno));
773 else debug_printf(" <none>");
781 /*************************************************
783 *************************************************/
785 /* Exim exits via this function so that it always clears up any open
791 Returns: does not return
800 debug_printf(">>>>>>>>>>>>>>>> Exim pid=%d (%s) terminating with rc=%d "
801 ">>>>>>>>>>>>>>>>\n",
802 (int)getpid(), process_purpose, rc);
808 exim_underbar_exit(int rc)
812 debug_printf(">>>>>>>>>>>>>>>> Exim pid=%d (%s) terminating with rc=%d "
813 ">>>>>>>>>>>>>>>>\n",
814 (int)getpid(), process_purpose, rc);
820 /* Print error string, then die */
822 exim_fail(const char * fmt, ...)
826 vfprintf(stderr, fmt, ap);
830 /* fail if a length is too long */
832 exim_len_fail_toolong(int itemlen, int maxlen, const char *description)
834 if (itemlen <= maxlen)
836 fprintf(stderr, "exim: length limit exceeded (%d > %d) for: %s\n",
837 itemlen, maxlen, description);
841 /* only pass through the string item back to the caller if it's short enough */
842 static inline const uschar *
843 exim_str_fail_toolong(const uschar *item, int maxlen, const char *description)
845 exim_len_fail_toolong(Ustrlen(item), maxlen, description);
849 /* exim_chown_failure() called from exim_chown()/exim_fchown() on failure
850 of chown()/fchown(). See src/functions.h for more explanation */
852 exim_chown_failure(int fd, const uschar *name, uid_t owner, gid_t group)
854 int saved_errno = errno; /* from the preceeding chown call */
856 log_write(0, LOG_MAIN|LOG_PANIC,
857 __FILE__ ":%d: chown(%s, %d:%d) failed (%s)."
858 " Please contact the authors and refer to https://bugs.exim.org/show_bug.cgi?id=2391",
859 __LINE__, name?name:US"<unknown>", owner, group, strerror(errno));
861 /* I leave this here, commented, in case the "bug"(?) comes up again.
862 It is not an Exim bug, but we can provide a workaround.
868 if (0 == (fd < 0 ? stat(name, &buf) : fstat(fd, &buf)))
870 if (buf.st_uid == owner && buf.st_gid == group) return 0;
871 log_write(0, LOG_MAIN|LOG_PANIC, "Wrong ownership on %s", name);
873 else log_write(0, LOG_MAIN|LOG_PANIC, "Stat failed on %s: %s", name, strerror(errno));
881 /*************************************************
882 * Extract port from host address *
883 *************************************************/
885 /* Called to extract the port from the values given to -oMa and -oMi.
886 It also checks the syntax of the address, and terminates it before the
887 port data when a port is extracted.
890 address the address, with possible port on the end
892 Returns: the port, or zero if there isn't one
893 bombs out on a syntax error
897 check_port(uschar *address)
899 int port = host_address_extract_port(address);
900 if (string_is_ip_address(address, NULL) == 0)
901 exim_fail("exim abandoned: \"%s\" is not an IP address\n", address);
907 /*************************************************
908 * Test/verify an address *
909 *************************************************/
911 /* This function is called by the -bv and -bt code. It extracts a working
912 address from a full RFC 822 address. This isn't really necessary per se, but it
913 has the effect of collapsing source routes.
917 flags flag bits for verify_address()
918 exit_value to be set for failures
924 test_address(uschar *s, int flags, int *exit_value)
926 int start, end, domain;
927 uschar *parse_error = NULL;
928 uschar *address = parse_extract_address(s, &parse_error, &start, &end, &domain,
932 fprintf(stdout, "syntax error: %s\n", parse_error);
937 int rc = verify_address(deliver_make_addr(address,TRUE), stdout, flags, -1,
938 -1, -1, NULL, NULL, NULL);
939 if (rc == FAIL) *exit_value = 2;
940 else if (rc == DEFER && *exit_value == 0) *exit_value = 1;
946 /*************************************************
947 * Show supported features *
948 *************************************************/
951 show_db_version(FILE * f)
953 #ifdef DB_VERSION_STRING
956 fprintf(f, "Library version: BDB: Compile: %s\n", DB_VERSION_STRING);
957 fprintf(f, " Runtime: %s\n",
958 db_version(NULL, NULL, NULL));
961 fprintf(f, "Berkeley DB: %s\n", DB_VERSION_STRING);
963 #elif defined(BTREEVERSION) && defined(HASHVERSION)
965 fprintf(f, "Probably Berkeley DB version 1.8x (native mode)\n");
967 fprintf(f, "Probably Berkeley DB version 1.8x (compatibility mode)\n");
970 #elif defined(_DBM_RDONLY) || defined(dbm_dirfno)
971 fprintf(f, "Probably ndbm\n");
972 #elif defined(USE_TDB)
973 fprintf(f, "Using tdb\n");
976 fprintf(f, "Probably GDBM (native mode)\n");
978 fprintf(f, "Probably GDBM (compatibility mode)\n");
984 /* This function is called for -bV/--version and for -d to output the optional
985 features of the current Exim binary.
987 Arguments: a FILE for printing
992 show_whats_supported(FILE * fp)
994 rmark reset_point = store_mark();
996 DEBUG(D_any) {} else show_db_version(fp);
998 g = string_cat(NULL, US"Support for:");
999 #ifdef SUPPORT_CRYPTEQ
1000 g = string_cat(g, US" crypteq");
1003 g = string_cat(g, US" iconv()");
1006 g = string_cat(g, US" IPv6");
1008 #ifdef HAVE_SETCLASSRESOURCES
1009 g = string_cat(g, US" use_setclassresources");
1012 g = string_cat(g, US" PAM");
1015 g = string_cat(g, US" Perl");
1017 #ifdef EXPAND_DLFUNC
1018 g = string_cat(g, US" Expand_dlfunc");
1020 #ifdef USE_TCP_WRAPPERS
1021 g = string_cat(g, US" TCPwrappers");
1024 g = string_cat(g, US" GnuTLS");
1027 g = string_cat(g, US" OpenSSL");
1029 #ifndef DISABLE_TLS_RESUME
1030 g = string_cat(g, US" TLS_resume");
1032 #ifdef SUPPORT_TRANSLATE_IP_ADDRESS
1033 g = string_cat(g, US" translate_ip_address");
1035 #ifdef SUPPORT_MOVE_FROZEN_MESSAGES
1036 g = string_cat(g, US" move_frozen_messages");
1038 #ifdef WITH_CONTENT_SCAN
1039 g = string_cat(g, US" Content_Scanning");
1042 g = string_cat(g, US" DANE");
1044 #ifndef DISABLE_DKIM
1045 g = string_cat(g, US" DKIM");
1047 #ifdef SUPPORT_DMARC
1048 g = string_cat(g, US" DMARC");
1050 #ifndef DISABLE_DNSSEC
1051 g = string_cat(g, US" DNSSEC");
1053 #ifndef DISABLE_EVENT
1054 g = string_cat(g, US" Event");
1057 g = string_cat(g, US" I18N");
1059 #ifndef DISABLE_OCSP
1060 g = string_cat(g, US" OCSP");
1062 #ifndef DISABLE_PIPE_CONNECT
1063 g = string_cat(g, US" PIPE_CONNECT");
1065 #ifndef DISABLE_PRDR
1066 g = string_cat(g, US" PRDR");
1068 #ifdef SUPPORT_PROXY
1069 g = string_cat(g, US" PROXY");
1071 #ifndef DISABLE_QUEUE_RAMP
1072 g = string_cat(g, US" Experimental_Queue_Ramp");
1074 #ifdef SUPPORT_SOCKS
1075 g = string_cat(g, US" SOCKS");
1078 g = string_cat(g, US" SPF");
1080 #if defined(SUPPORT_SRS)
1081 g = string_cat(g, US" SRS");
1085 if (f.tcp_fastopen_ok) g = string_cat(g, US" TCP_Fast_Open");
1087 #ifdef EXPERIMENTAL_ARC
1088 g = string_cat(g, US" Experimental_ARC");
1090 #ifdef EXPERIMENTAL_BRIGHTMAIL
1091 g = string_cat(g, US" Experimental_Brightmail");
1093 #ifdef EXPERIMENTAL_DCC
1094 g = string_cat(g, US" Experimental_DCC");
1096 #ifdef EXPERIMENTAL_DSN_INFO
1097 g = string_cat(g, US" Experimental_DSN_info");
1099 #ifdef EXPERIMENTAL_ESMTP_LIMITS
1100 g = string_cat(g, US" Experimental_ESMTP_Limits");
1102 #ifdef EXPERIMENTAL_QUEUEFILE
1103 g = string_cat(g, US" Experimental_QUEUEFILE");
1105 #if defined(EXPERIMENTAL_SRS_ALT)
1106 g = string_cat(g, US" Experimental_SRS");
1108 g = string_cat(g, US"\n");
1110 g = string_cat(g, US"Lookups (built-in):");
1111 #if defined(LOOKUP_LSEARCH) && LOOKUP_LSEARCH!=2
1112 g = string_cat(g, US" lsearch wildlsearch nwildlsearch iplsearch");
1114 #if defined(LOOKUP_CDB) && LOOKUP_CDB!=2
1115 g = string_cat(g, US" cdb");
1117 #if defined(LOOKUP_DBM) && LOOKUP_DBM!=2
1118 g = string_cat(g, US" dbm dbmjz dbmnz");
1120 #if defined(LOOKUP_DNSDB) && LOOKUP_DNSDB!=2
1121 g = string_cat(g, US" dnsdb");
1123 #if defined(LOOKUP_DSEARCH) && LOOKUP_DSEARCH!=2
1124 g = string_cat(g, US" dsearch");
1126 #if defined(LOOKUP_IBASE) && LOOKUP_IBASE!=2
1127 g = string_cat(g, US" ibase");
1129 #if defined(LOOKUP_JSON) && LOOKUP_JSON!=2
1130 g = string_cat(g, US" json");
1132 #if defined(LOOKUP_LDAP) && LOOKUP_LDAP!=2
1133 g = string_cat(g, US" ldap ldapdn ldapm");
1136 g = string_cat(g, US" lmdb");
1138 #if defined(LOOKUP_MYSQL) && LOOKUP_MYSQL!=2
1139 g = string_cat(g, US" mysql");
1141 #if defined(LOOKUP_NIS) && LOOKUP_NIS!=2
1142 g = string_cat(g, US" nis nis0");
1144 #if defined(LOOKUP_NISPLUS) && LOOKUP_NISPLUS!=2
1145 g = string_cat(g, US" nisplus");
1147 #if defined(LOOKUP_ORACLE) && LOOKUP_ORACLE!=2
1148 g = string_cat(g, US" oracle");
1150 #if defined(LOOKUP_PASSWD) && LOOKUP_PASSWD!=2
1151 g = string_cat(g, US" passwd");
1153 #if defined(LOOKUP_PGSQL) && LOOKUP_PGSQL!=2
1154 g = string_cat(g, US" pgsql");
1156 #if defined(LOOKUP_REDIS) && LOOKUP_REDIS!=2
1157 g = string_cat(g, US" redis");
1159 #if defined(LOOKUP_SQLITE) && LOOKUP_SQLITE!=2
1160 g = string_cat(g, US" sqlite");
1162 #if defined(LOOKUP_TESTDB) && LOOKUP_TESTDB!=2
1163 g = string_cat(g, US" testdb");
1165 #if defined(LOOKUP_WHOSON) && LOOKUP_WHOSON!=2
1166 g = string_cat(g, US" whoson");
1168 g = string_cat(g, US"\n");
1170 g = auth_show_supported(g);
1171 g = route_show_supported(g);
1172 g = transport_show_supported(g);
1174 #ifdef WITH_CONTENT_SCAN
1175 g = malware_show_supported(g);
1178 if (fixed_never_users[0] > 0)
1181 g = string_cat(g, US"Fixed never_users: ");
1182 for (i = 1; i <= (int)fixed_never_users[0] - 1; i++)
1183 string_fmt_append(g, "%u:", (unsigned)fixed_never_users[i]);
1184 g = string_fmt_append(g, "%u\n", (unsigned)fixed_never_users[i]);
1187 g = string_fmt_append(g, "Configure owner: %d:%d\n", config_uid, config_gid);
1188 fputs(CS string_from_gstring(g), fp);
1190 fprintf(fp, "Size of off_t: " SIZE_T_FMT "\n", sizeof(off_t));
1192 /* Everything else is details which are only worth reporting when debugging.
1193 Perhaps the tls_version_report should move into this too. */
1196 /* clang defines __GNUC__ (at least, for me) so test for it first */
1197 #if defined(__clang__)
1198 fprintf(fp, "Compiler: CLang [%s]\n", __clang_version__);
1199 #elif defined(__GNUC__)
1200 fprintf(fp, "Compiler: GCC [%s]\n",
1204 "? unknown version ?"
1208 fprintf(fp, "Compiler: <unknown>\n");
1211 #if defined(__GLIBC__) && !defined(__UCLIBC__)
1212 fprintf(fp, "Library version: Glibc: Compile: %d.%d\n",
1213 __GLIBC__, __GLIBC_MINOR__);
1214 if (__GLIBC_PREREQ(2, 1))
1215 fprintf(fp, " Runtime: %s\n",
1216 gnu_get_libc_version());
1219 show_db_version(fp);
1222 tls_version_report(fp);
1225 utf8_version_report(fp);
1227 #ifdef SUPPORT_DMARC
1228 dmarc_version_report(fp);
1231 spf_lib_version_report(fp);
1234 for (auth_info * authi = auths_available; *authi->driver_name != '\0'; ++authi)
1235 if (authi->version_report)
1236 (*authi->version_report)(fp);
1238 /* PCRE_PRERELEASE is either defined and empty or a bare sequence of
1239 characters; unless it's an ancient version of PCRE in which case it
1241 #ifndef PCRE_PRERELEASE
1242 # define PCRE_PRERELEASE
1245 #define EXPAND_AND_QUOTE(X) QUOTE(X)
1248 pcre2_config(PCRE2_CONFIG_VERSION, buf);
1249 fprintf(fp, "Library version: PCRE2: Compile: %d.%d%s\n"
1251 PCRE2_MAJOR, PCRE2_MINOR,
1252 EXPAND_AND_QUOTE(PCRE2_PRERELEASE) "",
1256 #undef EXPAND_AND_QUOTE
1259 for (int i = 0; i < lookup_list_count; i++)
1260 if (lookup_list[i]->version_report)
1261 lookup_list[i]->version_report(fp);
1263 #ifdef WHITELIST_D_MACROS
1264 fprintf(fp, "WHITELIST_D_MACROS: \"%s\"\n", WHITELIST_D_MACROS);
1266 fprintf(fp, "WHITELIST_D_MACROS unset\n");
1268 #ifdef TRUSTED_CONFIG_LIST
1269 fprintf(fp, "TRUSTED_CONFIG_LIST: \"%s\"\n", TRUSTED_CONFIG_LIST);
1271 fprintf(fp, "TRUSTED_CONFIG_LIST unset\n");
1275 store_reset(reset_point);
1279 /*************************************************
1280 * Show auxiliary information about Exim *
1281 *************************************************/
1284 show_exim_information(enum commandline_info request, FILE *stream)
1289 fprintf(stream, "Oops, something went wrong.\n");
1293 "The -bI: flag takes a string indicating which information to provide.\n"
1294 "If the string is not recognised, you'll get this help (on stderr).\n"
1296 " exim -bI:help this information\n"
1297 " exim -bI:dscp list of known dscp value keywords\n"
1298 " exim -bI:sieve list of supported sieve extensions\n"
1302 for (const uschar ** pp = exim_sieve_extension_list; *pp; ++pp)
1303 fprintf(stream, "%s\n", *pp);
1306 dscp_list_to_stream(stream);
1312 /*************************************************
1313 * Quote a local part *
1314 *************************************************/
1316 /* This function is used when a sender address or a From: or Sender: header
1317 line is being created from the caller's login, or from an authenticated_id. It
1318 applies appropriate quoting rules for a local part.
1320 Argument: the local part
1321 Returns: the local part, quoted if necessary
1325 local_part_quote(uschar *lpart)
1327 BOOL needs_quote = FALSE;
1330 for (uschar * t = lpart; !needs_quote && *t != 0; t++)
1332 needs_quote = !isalnum(*t) && strchr("!#$%&'*+-/=?^_`{|}~", *t) == NULL &&
1333 (*t != '.' || t == lpart || t[1] == 0);
1336 if (!needs_quote) return lpart;
1338 g = string_catn(NULL, US"\"", 1);
1342 uschar *nq = US Ustrpbrk(lpart, "\\\"");
1345 g = string_cat(g, lpart);
1348 g = string_catn(g, lpart, nq - lpart);
1349 g = string_catn(g, US"\\", 1);
1350 g = string_catn(g, nq, 1);
1354 g = string_catn(g, US"\"", 1);
1355 return string_from_gstring(g);
1361 /*************************************************
1362 * Load readline() functions *
1363 *************************************************/
1365 /* This function is called from testing executions that read data from stdin,
1366 but only when running as the calling user. Currently, only -be does this. The
1367 function loads the readline() function library and passes back the functions.
1368 On some systems, it needs the curses library, so load that too, but try without
1369 it if loading fails. All this functionality has to be requested at build time.
1372 fn_readline_ptr pointer to where to put the readline pointer
1373 fn_addhist_ptr pointer to where to put the addhistory function
1375 Returns: the dlopen handle or NULL on failure
1379 set_readline(char * (**fn_readline_ptr)(const char *),
1380 void (**fn_addhist_ptr)(const char *))
1383 void *dlhandle_curses = dlopen("libcurses." DYNLIB_FN_EXT, RTLD_GLOBAL|RTLD_LAZY);
1385 dlhandle = dlopen("libreadline." DYNLIB_FN_EXT, RTLD_GLOBAL|RTLD_NOW);
1386 if (dlhandle_curses) dlclose(dlhandle_curses);
1390 /* Checked manual pages; at least in GNU Readline 6.1, the prototypes are:
1391 * char * readline (const char *prompt);
1392 * void add_history (const char *string);
1394 *fn_readline_ptr = (char *(*)(const char*))dlsym(dlhandle, "readline");
1395 *fn_addhist_ptr = (void(*)(const char*))dlsym(dlhandle, "add_history");
1398 DEBUG(D_any) debug_printf("failed to load readline: %s\n", dlerror());
1406 /*************************************************
1407 * Get a line from stdin for testing things *
1408 *************************************************/
1410 /* This function is called when running tests that can take a number of lines
1411 of input (for example, -be and -bt). It handles continuations and trailing
1412 spaces. And prompting and a blank line output on eof. If readline() is in use,
1413 the arguments are non-NULL and provide the relevant functions.
1416 fn_readline readline function or NULL
1417 fn_addhist addhist function or NULL
1419 Returns: pointer to dynamic memory, or NULL at end of file
1423 get_stdinput(char *(*fn_readline)(const char *), void(*fn_addhist)(const char *))
1427 if (!fn_readline) { printf("> "); fflush(stdout); }
1429 for (int i = 0;; i++)
1431 uschar buffer[1024];
1435 char *readline_line = NULL;
1438 if (!(readline_line = fn_readline((i > 0)? "":"> "))) break;
1439 if (*readline_line != 0 && fn_addhist) fn_addhist(readline_line);
1440 p = US readline_line;
1445 /* readline() not in use */
1448 if (Ufgets(buffer, sizeof(buffer), stdin) == NULL) break;
1452 /* Handle the line */
1454 ss = p + (int)Ustrlen(p);
1455 while (ss > p && isspace(ss[-1])) ss--;
1458 while (p < ss && isspace(*p)) p++; /* leading space after cont */
1460 g = string_catn(g, p, ss - p);
1463 if (fn_readline) free(readline_line);
1466 /* g can only be NULL if ss==p */
1467 if (ss == p || g->s[g->ptr-1] != '\\')
1471 (void) string_from_gstring(g);
1474 if (!g) printf("\n");
1475 return string_from_gstring(g);
1480 /*************************************************
1481 * Output usage information for the program *
1482 *************************************************/
1484 /* This function is called when there are no recipients
1485 or a specific --help argument was added.
1488 progname information on what name we were called by
1490 Returns: DOES NOT RETURN
1494 exim_usage(uschar *progname)
1497 /* Handle specific program invocation variants */
1498 if (Ustrcmp(progname, US"-mailq") == 0)
1500 "mailq - list the contents of the mail queue\n\n"
1501 "For a list of options, see the Exim documentation.\n");
1503 /* Generic usage - we output this whatever happens */
1505 "Exim is a Mail Transfer Agent. It is normally called by Mail User Agents,\n"
1506 "not directly from a shell command line. Options and/or arguments control\n"
1507 "what it does when called. For a list of options, see the Exim documentation.\n");
1512 /*************************************************
1513 * Validate that the macros given are okay *
1514 *************************************************/
1516 /* Typically, Exim will drop privileges if macros are supplied. In some
1517 cases, we want to not do so.
1519 Arguments: opt_D_used - true if the commandline had a "-D" option
1520 Returns: true if trusted, false otherwise
1524 macros_trusted(BOOL opt_D_used)
1526 #ifdef WHITELIST_D_MACROS
1527 uschar *whitelisted, *end, *p, **whites;
1528 int white_count, i, n;
1530 BOOL prev_char_item, found;
1535 #ifndef WHITELIST_D_MACROS
1539 /* We only trust -D overrides for some invoking users:
1540 root, the exim run-time user, the optional config owner user.
1541 I don't know why config-owner would be needed, but since they can own the
1542 config files anyway, there's no security risk to letting them override -D. */
1543 if ( ! ((real_uid == root_uid)
1544 || (real_uid == exim_uid)
1545 #ifdef CONFIGURE_OWNER
1546 || (real_uid == config_uid)
1550 debug_printf("macros_trusted rejecting macros for uid %d\n", (int) real_uid);
1554 /* Get a list of macros which are whitelisted */
1555 whitelisted = string_copy_perm(US WHITELIST_D_MACROS, FALSE);
1556 prev_char_item = FALSE;
1558 for (p = whitelisted; *p != '\0'; ++p)
1560 if (*p == ':' || isspace(*p))
1565 prev_char_item = FALSE;
1568 if (!prev_char_item)
1569 prev_char_item = TRUE;
1576 whites = store_malloc(sizeof(uschar *) * (white_count+1));
1577 for (p = whitelisted, i = 0; (p != end) && (i < white_count); ++p)
1582 if (i == white_count)
1584 while (*p != '\0' && p < end)
1590 /* The list of commandline macros should be very short.
1591 Accept the N*M complexity. */
1592 for (macro_item * m = macros_user; m; m = m->next) if (m->command_line)
1595 for (uschar ** w = whites; *w; ++w)
1596 if (Ustrcmp(*w, m->name) == 0)
1603 if (!m->replacement)
1605 if ((len = m->replen) == 0)
1607 if (!regex_match(regex_whitelisted_macro, m->replacement, len, NULL))
1610 DEBUG(D_any) debug_printf("macros_trusted overridden to true by whitelisting\n");
1616 /*************************************************
1617 * Expansion testing *
1618 *************************************************/
1620 /* Expand and print one item, doing macro-processing.
1623 item line for expansion
1627 expansion_test_line(const uschar * line)
1633 Ustrncpy(big_buffer, line, big_buffer_size);
1634 big_buffer[big_buffer_size-1] = '\0';
1635 len = Ustrlen(big_buffer);
1637 (void) macros_expand(0, &len, &dummy_macexp);
1639 if (isupper(big_buffer[0]))
1641 if (macro_read_assignment(big_buffer))
1642 printf("Defined macro '%s'\n", mlast->name);
1645 if ((s = expand_string(big_buffer))) printf("%s\n", CS s);
1646 else printf("Failed: %s\n", expand_string_message);
1651 /*************************************************
1652 * Entry point and high-level code *
1653 *************************************************/
1655 /* Entry point for the Exim mailer. Analyse the arguments and arrange to take
1656 the appropriate action. All the necessary functions are present in the one
1657 binary. I originally thought one should split it up, but it turns out that so
1658 much of the apparatus is needed in each chunk that one might as well just have
1659 it all available all the time, which then makes the coding easier as well.
1662 argc count of entries in argv
1663 argv argument strings, with argv[0] being the program name
1665 Returns: EXIT_SUCCESS if terminated successfully
1666 EXIT_FAILURE otherwise, except when a message has been sent
1667 to the sender, and -oee was given
1671 main(int argc, char **cargv)
1673 uschar **argv = USS cargv;
1674 int arg_receive_timeout = -1;
1675 int arg_smtp_receive_timeout = -1;
1676 int arg_error_handling = error_handling;
1677 int filter_sfd = -1;
1678 int filter_ufd = -1;
1681 int list_queue_option = 0;
1683 int msg_action_arg = -1;
1684 int namelen = (argv[0] == NULL)? 0 : Ustrlen(argv[0]);
1685 int queue_only_reason = 0;
1687 int perl_start_option = 0;
1689 int recipients_arg = argc;
1690 int sender_address_domain = 0;
1691 int test_retry_arg = -1;
1692 int test_rewrite_arg = -1;
1693 gid_t original_egid;
1694 BOOL arg_queue_only = FALSE;
1695 BOOL bi_option = FALSE;
1696 BOOL checking = FALSE;
1697 BOOL count_queue = FALSE;
1698 BOOL expansion_test = FALSE;
1699 BOOL extract_recipients = FALSE;
1700 BOOL flag_G = FALSE;
1701 BOOL flag_n = FALSE;
1702 BOOL forced_delivery = FALSE;
1703 BOOL f_end_dot = FALSE;
1704 BOOL deliver_give_up = FALSE;
1705 BOOL list_queue = FALSE;
1706 BOOL list_options = FALSE;
1707 BOOL list_config = FALSE;
1708 BOOL local_queue_only;
1709 BOOL one_msg_action = FALSE;
1710 BOOL opt_D_used = FALSE;
1711 BOOL queue_only_set = FALSE;
1712 BOOL receiving_message = TRUE;
1713 BOOL sender_ident_set = FALSE;
1714 BOOL session_local_queue_only;
1716 BOOL removed_privilege = FALSE;
1717 BOOL usage_wanted = FALSE;
1718 BOOL verify_address_mode = FALSE;
1719 BOOL verify_as_sender = FALSE;
1720 BOOL rcpt_verify_quota = FALSE;
1721 BOOL version_printed = FALSE;
1722 uschar *alias_arg = NULL;
1723 uschar *called_as = US"";
1724 uschar *cmdline_syslog_name = NULL;
1725 uschar *start_queue_run_id = NULL;
1726 uschar *stop_queue_run_id = NULL;
1727 uschar *expansion_test_message = NULL;
1728 const uschar *ftest_domain = NULL;
1729 const uschar *ftest_localpart = NULL;
1730 const uschar *ftest_prefix = NULL;
1731 const uschar *ftest_suffix = NULL;
1732 uschar *log_oneline = NULL;
1733 uschar *malware_test_file = NULL;
1734 uschar *real_sender_address;
1735 uschar *originator_home = US"/";
1739 struct stat statbuf;
1740 pid_t passed_qr_pid = (pid_t)0;
1741 int passed_qr_pipe = -1;
1742 gid_t group_list[EXIM_GROUPLIST_SIZE];
1744 /* For the -bI: flag */
1745 enum commandline_info info_flag = CMDINFO_NONE;
1746 BOOL info_stdout = FALSE;
1748 /* Possible options for -R and -S */
1750 static uschar *rsopts[] = { US"f", US"ff", US"r", US"rf", US"rff" };
1752 /* Need to define this in case we need to change the environment in order
1753 to get rid of a bogus time zone. We have to make it char rather than uschar
1754 because some OS define it in /usr/include/unistd.h. */
1756 extern char **environ;
1758 #ifdef MEASURE_TIMING
1759 (void)gettimeofday(×tamp_startup, NULL);
1762 store_init(); /* Initialise the memory allocation susbsystem */
1763 pcre_init(); /* Set up memory handling for pcre */
1765 /* If the Exim user and/or group and/or the configuration file owner/group were
1766 defined by ref:name at build time, we must now find the actual uid/gid values.
1767 This is a feature to make the lives of binary distributors easier. */
1769 #ifdef EXIM_USERNAME
1770 if (route_finduser(US EXIM_USERNAME, &pw, &exim_uid))
1773 exim_fail("exim: refusing to run with uid 0 for \"%s\"\n", EXIM_USERNAME);
1775 /* If ref:name uses a number as the name, route_finduser() returns
1776 TRUE with exim_uid set and pw coerced to NULL. */
1778 exim_gid = pw->pw_gid;
1779 #ifndef EXIM_GROUPNAME
1782 "exim: ref:name should specify a usercode, not a group.\n"
1783 "exim: can't let you get away with it unless you also specify a group.\n");
1787 exim_fail("exim: failed to find uid for user name \"%s\"\n", EXIM_USERNAME);
1790 #ifdef EXIM_GROUPNAME
1791 if (!route_findgroup(US EXIM_GROUPNAME, &exim_gid))
1792 exim_fail("exim: failed to find gid for group name \"%s\"\n", EXIM_GROUPNAME);
1795 #ifdef CONFIGURE_OWNERNAME
1796 if (!route_finduser(US CONFIGURE_OWNERNAME, NULL, &config_uid))
1797 exim_fail("exim: failed to find uid for user name \"%s\"\n",
1798 CONFIGURE_OWNERNAME);
1801 /* We default the system_filter_user to be the Exim run-time user, as a
1802 sane non-root value. */
1803 system_filter_uid = exim_uid;
1805 #ifdef CONFIGURE_GROUPNAME
1806 if (!route_findgroup(US CONFIGURE_GROUPNAME, &config_gid))
1807 exim_fail("exim: failed to find gid for group name \"%s\"\n",
1808 CONFIGURE_GROUPNAME);
1811 /* In the Cygwin environment, some initialization used to need doing.
1812 It was fudged in by means of this macro; now no longer but we'll leave
1813 it in case of others. */
1819 /* Check a field which is patched when we are running Exim within its
1820 testing harness; do a fast initial check, and then the whole thing. */
1822 f.running_in_test_harness =
1823 *running_status == '<' && Ustrcmp(running_status, "<<<testing>>>") == 0;
1824 if (f.running_in_test_harness)
1827 /* Protect against abusive argv[0] */
1828 exim_str_fail_toolong(argv[0], PATH_MAX, "argv[0]");
1830 /* The C standard says that the equivalent of setlocale(LC_ALL, "C") is obeyed
1831 at the start of a program; however, it seems that some environments do not
1832 follow this. A "strange" locale can affect the formatting of timestamps, so we
1835 setlocale(LC_ALL, "C");
1837 /* Get the offset between CLOCK_MONOTONIC/CLOCK_BOOTTIME and wallclock */
1839 #ifdef _POSIX_MONOTONIC_CLOCK
1843 /* Set up the default handler for timing using alarm(). */
1845 os_non_restarting_signal(SIGALRM, sigalrm_handler);
1847 /* Ensure we have a buffer for constructing log entries. Use malloc directly,
1848 because store_malloc writes a log entry on failure. */
1850 if (!(log_buffer = US malloc(LOG_BUFFER_SIZE)))
1851 exim_fail("exim: failed to get store for log buffer\n");
1853 /* Initialize the default log options. */
1855 bits_set(log_selector, log_selector_size, log_default);
1857 /* Set log_stderr to stderr, provided that stderr exists. This gets reset to
1858 NULL when the daemon is run and the file is closed. We have to use this
1859 indirection, because some systems don't allow writing to the variable "stderr".
1862 if (fstat(fileno(stderr), &statbuf) >= 0) log_stderr = stderr;
1864 /* Ensure there is a big buffer for temporary use in several places. It is put
1865 in malloc store so that it can be freed for enlargement if necessary. */
1867 big_buffer = store_malloc(big_buffer_size);
1869 /* Set up the handler for the data request signal, and set the initial
1870 descriptive text. */
1872 process_info = store_get(PROCESS_INFO_SIZE, TRUE); /* tainted */
1873 set_process_info("initializing");
1874 os_restarting_signal(SIGUSR1, usr1_handler); /* exiwhat */
1875 signal(SIGSEGV, segv_handler); /* log faults */
1877 /* If running in a dockerized environment, the TERM signal is only
1878 delegated to the PID 1 if we request it by setting an signal handler */
1879 if (getpid() == 1) signal(SIGTERM, term_handler);
1881 /* SIGHUP is used to get the daemon to reconfigure. It gets set as appropriate
1882 in the daemon code. For the rest of Exim's uses, we ignore it. */
1884 signal(SIGHUP, SIG_IGN);
1886 /* We don't want to die on pipe errors as the code is written to handle
1887 the write error instead. */
1889 signal(SIGPIPE, SIG_IGN);
1891 /* Under some circumstance on some OS, Exim can get called with SIGCHLD
1892 set to SIG_IGN. This causes subprocesses that complete before the parent
1893 process waits for them not to hang around, so when Exim calls wait(), nothing
1894 is there. The wait() code has been made robust against this, but let's ensure
1895 that SIGCHLD is set to SIG_DFL, because it's tidier to wait and get a process
1896 ending status. We use sigaction rather than plain signal() on those OS where
1897 SA_NOCLDWAIT exists, because we want to be sure it is turned off. (There was a
1898 problem on AIX with this.) */
1902 struct sigaction act;
1903 act.sa_handler = SIG_DFL;
1904 sigemptyset(&(act.sa_mask));
1906 sigaction(SIGCHLD, &act, NULL);
1909 signal(SIGCHLD, SIG_DFL);
1912 /* Save the arguments for use if we re-exec exim as a daemon after receiving
1917 /* Set up the version number. Set up the leading 'E' for the external form of
1918 message ids, set the pointer to the internal form, and initialize it to
1919 indicate no message being processed. */
1922 message_id_option[0] = '-';
1923 message_id_external = message_id_option + 1;
1924 message_id_external[0] = 'E';
1925 message_id = message_id_external + 1;
1928 /* Set the umask to zero so that any files Exim creates using open() are
1929 created with the modes that it specifies. NOTE: Files created with fopen() have
1930 a problem, which was not recognized till rather late (February 2006). With this
1931 umask, such files will be world writeable. (They are all content scanning files
1932 in the spool directory, which isn't world-accessible, so this is not a
1933 disaster, but it's untidy.) I don't want to change this overall setting,
1934 however, because it will interact badly with the open() calls. Instead, there's
1935 now a function called modefopen() that fiddles with the umask while calling
1940 /* Precompile the regular expression for matching a message id. Keep this in
1941 step with the code that generates ids in the accept.c module. We need to do
1942 this here, because the -M options check their arguments for syntactic validity
1943 using mac_ismsgid, which uses this. */
1946 regex_must_compile(US"^(?:[^\\W_]{6}-){2}[^\\W_]{2}$", FALSE, TRUE);
1948 /* Precompile the regular expression that is used for matching an SMTP error
1949 code, possibly extended, at the start of an error message. Note that the
1950 terminating whitespace character is included. */
1953 regex_must_compile(US"^\\d\\d\\d\\s(?:\\d\\.\\d\\d?\\d?\\.\\d\\d?\\d?\\s)?",
1956 #ifdef WHITELIST_D_MACROS
1957 /* Precompile the regular expression used to filter the content of macros
1958 given to -D for permissibility. */
1960 regex_whitelisted_macro =
1961 regex_must_compile(US"^[A-Za-z0-9_/.-]*$", FALSE, TRUE);
1964 for (i = 0; i < REGEX_VARS; i++) regex_vars[i] = NULL;
1966 /* If the program is called as "mailq" treat it as equivalent to "exim -bp";
1967 this seems to be a generally accepted convention, since one finds symbolic
1968 links called "mailq" in standard OS configurations. */
1970 if ((namelen == 5 && Ustrcmp(argv[0], "mailq") == 0) ||
1971 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/mailq", 6) == 0))
1974 receiving_message = FALSE;
1975 called_as = US"-mailq";
1978 /* If the program is called as "rmail" treat it as equivalent to
1979 "exim -i -oee", thus allowing UUCP messages to be input using non-SMTP mode,
1980 i.e. preventing a single dot on a line from terminating the message, and
1981 returning with zero return code, even in cases of error (provided an error
1982 message has been sent). */
1984 if ((namelen == 5 && Ustrcmp(argv[0], "rmail") == 0) ||
1985 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/rmail", 6) == 0))
1988 called_as = US"-rmail";
1989 errors_sender_rc = EXIT_SUCCESS;
1992 /* If the program is called as "rsmtp" treat it as equivalent to "exim -bS";
1993 this is a smail convention. */
1995 if ((namelen == 5 && Ustrcmp(argv[0], "rsmtp") == 0) ||
1996 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/rsmtp", 6) == 0))
1998 smtp_input = smtp_batched_input = TRUE;
1999 called_as = US"-rsmtp";
2002 /* If the program is called as "runq" treat it as equivalent to "exim -q";
2003 this is a smail convention. */
2005 if ((namelen == 4 && Ustrcmp(argv[0], "runq") == 0) ||
2006 (namelen > 4 && Ustrncmp(argv[0] + namelen - 5, "/runq", 5) == 0))
2009 receiving_message = FALSE;
2010 called_as = US"-runq";
2013 /* If the program is called as "newaliases" treat it as equivalent to
2014 "exim -bi"; this is a sendmail convention. */
2016 if ((namelen == 10 && Ustrcmp(argv[0], "newaliases") == 0) ||
2017 (namelen > 10 && Ustrncmp(argv[0] + namelen - 11, "/newaliases", 11) == 0))
2020 receiving_message = FALSE;
2021 called_as = US"-newaliases";
2024 /* Save the original effective uid for a couple of uses later. It should
2025 normally be root, but in some esoteric environments it may not be. */
2027 original_euid = geteuid();
2028 original_egid = getegid();
2030 /* Get the real uid and gid. If the caller is root, force the effective uid/gid
2031 to be the same as the real ones. This makes a difference only if Exim is setuid
2032 (or setgid) to something other than root, which could be the case in some
2033 special configurations. */
2035 real_uid = getuid();
2036 real_gid = getgid();
2038 if (real_uid == root_uid)
2040 if ((rv = setgid(real_gid)))
2041 exim_fail("exim: setgid(%ld) failed: %s\n",
2042 (long int)real_gid, strerror(errno));
2043 if ((rv = setuid(real_uid)))
2044 exim_fail("exim: setuid(%ld) failed: %s\n",
2045 (long int)real_uid, strerror(errno));
2048 /* If neither the original real uid nor the original euid was root, Exim is
2049 running in an unprivileged state. */
2051 unprivileged = (real_uid != root_uid && original_euid != root_uid);
2053 /* For most of the args-parsing we need to use permanent pool memory */
2055 int old_pool = store_pool;
2056 store_pool = POOL_PERM;
2058 /* Scan the program's arguments. Some can be dealt with right away; others are
2059 simply recorded for checking and handling afterwards. Do a high-level switch
2060 on the second character (the one after '-'), to save some effort. */
2062 for (i = 1; i < argc; i++)
2064 BOOL badarg = FALSE;
2065 uschar * arg = argv[i];
2069 /* An argument not starting with '-' is the start of a recipients list;
2070 break out of the options-scanning loop. */
2078 /* An option consisting of -- terminates the options */
2080 if (Ustrcmp(arg, "--") == 0)
2082 recipients_arg = i + 1;
2086 /* Handle flagged options */
2088 switchchar = arg[1];
2091 /* Make all -ex options synonymous with -oex arguments, since that
2092 is assumed by various callers. Also make -qR options synonymous with -R
2093 options, as that seems to be required as well. Allow for -qqR too, and
2094 the same for -S options. */
2096 if (Ustrncmp(arg+1, "oe", 2) == 0 ||
2097 Ustrncmp(arg+1, "qR", 2) == 0 ||
2098 Ustrncmp(arg+1, "qS", 2) == 0)
2100 switchchar = arg[2];
2103 else if (Ustrncmp(arg+1, "qqR", 3) == 0 || Ustrncmp(arg+1, "qqS", 3) == 0)
2105 switchchar = arg[3];
2107 f.queue_2stage = TRUE;
2110 /* Make -r synonymous with -f, since it is a documented alias */
2112 else if (arg[1] == 'r') switchchar = 'f';
2114 /* Make -ov synonymous with -v */
2116 else if (Ustrcmp(arg, "-ov") == 0)
2122 /* deal with --option_aliases */
2123 else if (switchchar == '-')
2125 if (Ustrcmp(argrest, "help") == 0)
2127 usage_wanted = TRUE;
2130 else if (Ustrcmp(argrest, "version") == 0)
2137 /* High-level switch on active initial letter */
2142 /* sendmail uses -Ac and -Am to control which .cf file is used;
2145 if (!*argrest) { badarg = TRUE; break; }
2148 BOOL ignore = FALSE;
2153 if (*(argrest + 1) == '\0')
2157 if (!ignore) badarg = TRUE;
2161 /* -Btype is a sendmail option for 7bit/8bit setting. Exim is 8-bit clean
2162 so has no need of it. */
2165 if (!*argrest) i++; /* Skip over the type */
2171 receiving_message = FALSE; /* Reset TRUE for -bm, -bS, -bs below */
2175 /* -bd: Run in daemon mode, awaiting SMTP connections.
2176 -bdf: Ditto, but in the foreground.
2179 f.daemon_listen = TRUE;
2180 if (*argrest == 'f') f.background_daemon = FALSE;
2181 else if (*argrest) badarg = TRUE;
2184 /* -be: Run in expansion test mode
2185 -bem: Ditto, but read a message from a file first
2188 expansion_test = checking = TRUE;
2189 if (*argrest == 'm')
2191 if (++i >= argc) { badarg = TRUE; break; }
2192 expansion_test_message = argv[i];
2195 if (*argrest) badarg = TRUE;
2198 /* -bF: Run system filter test */
2200 filter_test |= checking = FTEST_SYSTEM;
2201 if (*argrest) badarg = TRUE;
2202 else if (++i < argc) filter_test_sfile = argv[i];
2203 else exim_fail("exim: file name expected after %s\n", argv[i-1]);
2206 /* -bf: Run user filter test
2207 -bfd: Set domain for filter testing
2208 -bfl: Set local part for filter testing
2209 -bfp: Set prefix for filter testing
2210 -bfs: Set suffix for filter testing
2215 filter_test |= checking = FTEST_USER;
2216 if (++i < argc) filter_test_ufile = argv[i];
2217 else exim_fail("exim: file name expected after %s\n", argv[i-1]);
2222 exim_fail("exim: string expected after %s\n", arg);
2223 if (Ustrcmp(argrest, "d") == 0) ftest_domain = exim_str_fail_toolong(argv[i], EXIM_DOMAINNAME_MAX, "-bfd");
2224 else if (Ustrcmp(argrest, "l") == 0) ftest_localpart = exim_str_fail_toolong(argv[i], EXIM_LOCALPART_MAX, "-bfl");
2225 else if (Ustrcmp(argrest, "p") == 0) ftest_prefix = exim_str_fail_toolong(argv[i], EXIM_LOCALPART_MAX, "-bfp");
2226 else if (Ustrcmp(argrest, "s") == 0) ftest_suffix = exim_str_fail_toolong(argv[i], EXIM_LOCALPART_MAX, "-bfs");
2231 /* -bh: Host checking - an IP address must follow. */
2233 if (!*argrest || Ustrcmp(argrest, "c") == 0)
2235 if (++i >= argc) { badarg = TRUE; break; }
2236 sender_host_address = string_copy_taint(exim_str_fail_toolong(argv[i], EXIM_IPADDR_MAX, "-bh"), TRUE);
2237 host_checking = checking = f.log_testing_mode = TRUE;
2238 f.host_checking_callout = *argrest == 'c';
2239 message_logs = FALSE;
2244 /* -bi: This option is used by sendmail to initialize *the* alias file,
2245 though it has the -oA option to specify a different file. Exim has no
2246 concept of *the* alias file, but since Sun's YP make script calls
2247 sendmail this way, some support must be provided. */
2249 if (!*argrest) bi_option = TRUE;
2253 /* -bI: provide information, of the type to follow after a colon.
2254 This is an Exim flag. */
2256 if (Ustrlen(argrest) >= 1 && *argrest == ':')
2258 uschar *p = argrest+1;
2259 info_flag = CMDINFO_HELP;
2261 if (strcmpic(p, CUS"sieve") == 0)
2263 info_flag = CMDINFO_SIEVE;
2266 else if (strcmpic(p, CUS"dscp") == 0)
2268 info_flag = CMDINFO_DSCP;
2271 else if (strcmpic(p, CUS"help") == 0)
2277 /* -bm: Accept and deliver message - the default option. Reinstate
2278 receiving_message, which got turned off for all -b options.
2279 -bmalware: test the filename given for malware */
2281 if (!*argrest) receiving_message = TRUE;
2282 else if (Ustrcmp(argrest, "alware") == 0)
2284 if (++i >= argc) { badarg = TRUE; break; }
2286 malware_test_file = argv[i];
2291 /* -bnq: For locally originating messages, do not qualify unqualified
2292 addresses. In the envelope, this causes errors; in header lines they
2295 if (Ustrcmp(argrest, "q") == 0)
2297 f.allow_unqualified_sender = FALSE;
2298 f.allow_unqualified_recipient = FALSE;
2303 /* -bpxx: List the contents of the mail queue, in various forms. If
2304 the option is -bpc, just a queue count is needed. Otherwise, if the
2305 first letter after p is r, then order is random. */
2307 if (*argrest == 'c')
2310 if (*++argrest) badarg = TRUE;
2314 if (*argrest == 'r')
2316 list_queue_option = 8;
2319 else list_queue_option = 0;
2323 /* -bp: List the contents of the mail queue, top-level only */
2327 /* -bpu: List the contents of the mail queue, top-level undelivered */
2329 else if (Ustrcmp(argrest, "u") == 0) list_queue_option += 1;
2331 /* -bpa: List the contents of the mail queue, including all delivered */
2333 else if (Ustrcmp(argrest, "a") == 0) list_queue_option += 2;
2335 /* Unknown after -bp[r] */
2341 /* -bP: List the configuration variables given as the address list.
2342 Force -v, so configuration errors get displayed. */
2345 /* -bP config: we need to setup here, because later,
2346 when list_options is checked, the config is read already */
2349 else if (argv[i+1] && Ustrcmp(argv[i+1], "config") == 0)
2352 readconf_save_config(version_string);
2356 list_options = TRUE;
2357 debug_selector |= D_v;
2358 debug_file = stderr;
2362 /* -brt: Test retry configuration lookup */
2364 if (Ustrcmp(argrest, "t") == 0)
2367 test_retry_arg = i + 1;
2371 /* -brw: Test rewrite configuration */
2373 else if (Ustrcmp(argrest, "w") == 0)
2376 test_rewrite_arg = i + 1;
2382 /* -bS: Read SMTP commands on standard input, but produce no replies -
2383 all errors are reported by sending messages. */
2386 smtp_input = smtp_batched_input = receiving_message = TRUE;
2390 /* -bs: Read SMTP commands on standard input and produce SMTP replies
2391 on standard output. */
2393 if (!*argrest) smtp_input = receiving_message = TRUE;
2397 /* -bt: address testing mode */
2400 f.address_test_mode = checking = f.log_testing_mode = TRUE;
2404 /* -bv: verify addresses */
2407 verify_address_mode = checking = f.log_testing_mode = TRUE;
2409 /* -bvs: verify sender addresses */
2411 else if (Ustrcmp(argrest, "s") == 0)
2413 verify_address_mode = checking = f.log_testing_mode = TRUE;
2414 verify_as_sender = TRUE;
2419 /* -bV: Print version string and support details */
2423 printf("Exim version %s #%s built %s\n", version_string,
2424 version_cnumber, version_date);
2425 printf("%s\n", CS version_copyright);
2426 version_printed = TRUE;
2427 show_whats_supported(stdout);
2428 f.log_testing_mode = TRUE;
2433 /* -bw: inetd wait mode, accept a listening socket as stdin */
2435 f.inetd_wait_mode = TRUE;
2436 f.background_daemon = FALSE;
2437 f.daemon_listen = TRUE;
2439 if ((inetd_wait_timeout = readconf_readtime(argrest, 0, FALSE)) <= 0)
2440 exim_fail("exim: bad time value %s: abandoned\n", argv[i]);
2451 /* -C: change configuration file list; ignore if it isn't really
2452 a change! Enforce a prefix check if required. */
2456 if (++i < argc) argrest = argv[i]; else { badarg = TRUE; break; }
2457 if (Ustrcmp(config_main_filelist, argrest) != 0)
2459 #ifdef ALT_CONFIG_PREFIX
2461 int len = Ustrlen(ALT_CONFIG_PREFIX);
2462 const uschar *list = argrest;
2464 /* The argv is untainted, so big_buffer (also untainted) is ok to use */
2465 while((filename = string_nextinlist(&list, &sep, big_buffer,
2467 if ( ( Ustrlen(filename) < len
2468 || Ustrncmp(filename, ALT_CONFIG_PREFIX, len) != 0
2469 || Ustrstr(filename, "/../") != NULL
2471 && (Ustrcmp(filename, "/dev/null") != 0 || real_uid != root_uid)
2473 exim_fail("-C Permission denied\n");
2475 if (real_uid != root_uid)
2477 #ifdef TRUSTED_CONFIG_LIST
2479 if (real_uid != exim_uid
2480 #ifdef CONFIGURE_OWNER
2481 && real_uid != config_uid
2484 f.trusted_config = FALSE;
2487 FILE *trust_list = Ufopen(TRUSTED_CONFIG_LIST, "rb");
2490 struct stat statbuf;
2492 if (fstat(fileno(trust_list), &statbuf) != 0 ||
2493 (statbuf.st_uid != root_uid /* owner not root */
2494 #ifdef CONFIGURE_OWNER
2495 && statbuf.st_uid != config_uid /* owner not the special one */
2498 (statbuf.st_gid != root_gid /* group not root */
2499 #ifdef CONFIGURE_GROUP
2500 && statbuf.st_gid != config_gid /* group not the special one */
2502 && (statbuf.st_mode & 020) != 0 /* group writeable */
2504 (statbuf.st_mode & 2) != 0) /* world writeable */
2506 f.trusted_config = FALSE;
2511 /* Well, the trust list at least is up to scratch... */
2513 uschar *trusted_configs[32];
2516 int old_pool = store_pool;
2517 store_pool = POOL_MAIN;
2519 reset_point = store_mark();
2520 while (Ufgets(big_buffer, big_buffer_size, trust_list))
2522 uschar *start = big_buffer, *nl;
2523 while (*start && isspace(*start))
2527 nl = Ustrchr(start, '\n');
2530 trusted_configs[nr_configs++] = string_copy(start);
2531 if (nr_configs == nelem(trusted_configs))
2539 const uschar *list = argrest;
2541 while (f.trusted_config && (filename = string_nextinlist(&list,
2542 &sep, big_buffer, big_buffer_size)))
2544 for (i=0; i < nr_configs; i++)
2545 if (Ustrcmp(filename, trusted_configs[i]) == 0)
2547 if (i == nr_configs)
2549 f.trusted_config = FALSE;
2554 else /* No valid prefixes found in trust_list file. */
2555 f.trusted_config = FALSE;
2556 store_reset(reset_point);
2557 store_pool = old_pool;
2560 else /* Could not open trust_list file. */
2561 f.trusted_config = FALSE;
2564 /* Not root; don't trust config */
2565 f.trusted_config = FALSE;
2569 config_main_filelist = argrest;
2570 f.config_changed = TRUE;
2575 /* -D: set up a macro definition */
2578 #ifdef DISABLE_D_OPTION
2579 exim_fail("exim: -D is not available in this Exim binary\n");
2585 uschar *s = argrest;
2588 while (isspace(*s)) s++;
2590 if (*s < 'A' || *s > 'Z')
2591 exim_fail("exim: macro name set by -D must start with "
2592 "an upper case letter\n");
2594 while (isalnum(*s) || *s == '_')
2596 if (ptr < sizeof(name)-1) name[ptr++] = *s;
2600 if (ptr == 0) { badarg = TRUE; break; }
2601 while (isspace(*s)) s++;
2604 if (*s++ != '=') { badarg = TRUE; break; }
2605 while (isspace(*s)) s++;
2608 for (m = macros_user; m; m = m->next)
2609 if (Ustrcmp(m->name, name) == 0)
2610 exim_fail("exim: duplicated -D in command line\n");
2612 m = macro_create(name, s, TRUE);
2614 if (clmacro_count >= MAX_CLMACROS)
2615 exim_fail("exim: too many -D options on command line\n");
2616 clmacros[clmacro_count++] =
2617 string_sprintf("-D%s=%s", m->name, m->replacement);
2622 /* -d: Set debug level (see also -v below) or set the drop_cr option.
2623 The latter is now a no-op, retained for compatibility only. If -dd is used,
2624 debugging subprocesses of the daemon is disabled. */
2627 if (Ustrcmp(argrest, "ropcr") == 0)
2629 /* drop_cr = TRUE; */
2632 /* Use an intermediate variable so that we don't set debugging while
2633 decoding the debugging bits. */
2637 unsigned int selector = D_default;
2640 if (*argrest == 'd')
2642 f.debug_daemon = TRUE;
2646 decode_bits(&selector, 1, debug_notall, argrest,
2647 debug_options, debug_options_count, US"debug", 0);
2648 debug_selector = selector;
2653 /* -E: This is a local error message. This option is not intended for
2654 external use at all, but is not restricted to trusted callers because it
2655 does no harm (just suppresses certain error messages) and if Exim is run
2656 not setuid root it won't always be trusted when it generates error
2657 messages using this option. If there is a message id following -E, point
2658 message_reference at it, for logging. */
2661 f.local_error_message = TRUE;
2662 if (mac_ismsgid(argrest)) message_reference = argrest;
2666 /* -ex: The vacation program calls sendmail with the undocumented "-eq"
2667 option, so it looks as if historically the -oex options are also callable
2668 without the leading -o. So we have to accept them. Before the switch,
2669 anything starting -oe has been converted to -e. Exim does not support all
2670 of the sendmail error options. */
2673 if (Ustrcmp(argrest, "e") == 0)
2675 arg_error_handling = ERRORS_SENDER;
2676 errors_sender_rc = EXIT_SUCCESS;
2678 else if (Ustrcmp(argrest, "m") == 0) arg_error_handling = ERRORS_SENDER;
2679 else if (Ustrcmp(argrest, "p") == 0) arg_error_handling = ERRORS_STDERR;
2680 else if (Ustrcmp(argrest, "q") == 0) arg_error_handling = ERRORS_STDERR;
2681 else if (Ustrcmp(argrest, "w") == 0) arg_error_handling = ERRORS_SENDER;
2686 /* -F: Set sender's full name, used instead of the gecos entry from
2687 the password file. Since users can usually alter their gecos entries,
2688 there's no security involved in using this instead. The data can follow
2689 the -F or be in the next argument. */
2693 if (++i < argc) argrest = argv[i]; else { badarg = TRUE; break; }
2694 originator_name = string_copy_taint(exim_str_fail_toolong(argrest, EXIM_HUMANNAME_MAX, "-F"), TRUE);
2695 f.sender_name_forced = TRUE;
2699 /* -f: Set sender's address - this value is only actually used if Exim is
2700 run by a trusted user, or if untrusted_set_sender is set and matches the
2701 address, except that the null address can always be set by any user. The
2702 test for this happens later, when the value given here is ignored when not
2703 permitted. For an untrusted user, the actual sender is still put in Sender:
2704 if it doesn't match the From: header (unless no_local_from_check is set).
2705 The data can follow the -f or be in the next argument. The -r switch is an
2706 obsolete form of -f but since there appear to be programs out there that
2707 use anything that sendmail has ever supported, better accept it - the
2708 synonymizing is done before the switch above.
2710 At this stage, we must allow domain literal addresses, because we don't
2711 know what the setting of allow_domain_literals is yet. Ditto for trailing
2712 dots and strip_trailing_dot. */
2716 int dummy_start, dummy_end;
2719 if (i+1 < argc) argrest = argv[++i]; else { badarg = TRUE; break; }
2720 (void) exim_str_fail_toolong(argrest, EXIM_DISPLAYMAIL_MAX, "-f");
2722 *(sender_address = store_get(1, FALSE)) = '\0'; /* Ensure writeable memory */
2725 uschar * temp = argrest + Ustrlen(argrest) - 1;
2726 while (temp >= argrest && isspace(*temp)) temp--;
2727 if (temp >= argrest && *temp == '.') f_end_dot = TRUE;
2728 allow_domain_literals = TRUE;
2729 strip_trailing_dot = TRUE;
2731 allow_utf8_domains = TRUE;
2733 if (!(sender_address = parse_extract_address(argrest, &errmess,
2734 &dummy_start, &dummy_end, &sender_address_domain, TRUE)))
2735 exim_fail("exim: bad -f address \"%s\": %s\n", argrest, errmess);
2737 sender_address = string_copy_taint(sender_address, TRUE);
2739 message_smtputf8 = string_is_utf8(sender_address);
2740 allow_utf8_domains = FALSE;
2742 allow_domain_literals = FALSE;
2743 strip_trailing_dot = FALSE;
2745 f.sender_address_forced = TRUE;
2749 /* -G: sendmail invocation to specify that it's a gateway submission and
2750 sendmail may complain about problems instead of fixing them.
2751 We make it equivalent to an ACL "control = suppress_local_fixups" and do
2752 not at this time complain about problems. */
2758 /* -h: Set the hop count for an incoming message. Exim does not currently
2759 support this; it always computes it by counting the Received: headers.
2760 To put it in will require a change to the spool header file format. */
2764 if (++i < argc) argrest = argv[i]; else { badarg = TRUE; break; }
2765 if (!isdigit(*argrest)) badarg = TRUE;
2769 /* -i: Set flag so dot doesn't end non-SMTP input (same as -oi, seems
2770 not to be documented for sendmail but mailx (at least) uses it) */
2773 if (!*argrest) f.dot_ends = FALSE; else badarg = TRUE;
2777 /* -L: set the identifier used for syslog; equivalent to setting
2778 syslog_processname in the config file, but needs to be an admin option. */
2782 if (++i < argc) argrest = argv[i]; else { badarg = TRUE; break; }
2783 if ((sz = Ustrlen(argrest)) > 32)
2784 exim_fail("exim: the -L syslog name is too long: \"%s\"\n", argrest);
2786 exim_fail("exim: the -L syslog name is too short\n");
2787 cmdline_syslog_name = string_copy_taint(argrest, TRUE);
2791 receiving_message = FALSE;
2793 /* -MC: continue delivery of another message via an existing open
2794 file descriptor. This option is used for an internal call by the
2795 smtp transport when there is a pending message waiting to go to an
2796 address to which it has got a connection. Five subsequent arguments are
2797 required: transport name, host name, IP address, sequence number, and
2798 message_id. Transports may decline to create new processes if the sequence
2799 number gets too big. The channel is stdin. This (-MC) must be the last
2800 argument. There's a subsequent check that the real-uid is privileged.
2802 If we are running in the test harness. delay for a bit, to let the process
2803 that set this one up complete. This makes for repeatability of the logging,
2806 if (Ustrcmp(argrest, "C") == 0)
2808 union sockaddr_46 interface_sock;
2809 EXIM_SOCKLEN_T size = sizeof(interface_sock);
2812 exim_fail("exim: too many or too few arguments after -MC\n");
2814 if (msg_action_arg >= 0)
2815 exim_fail("exim: incompatible arguments\n");
2817 continue_transport = string_copy_taint(exim_str_fail_toolong(argv[++i], EXIM_DRIVERNAME_MAX, "-C internal transport"), TRUE);
2818 continue_hostname = string_copy_taint(exim_str_fail_toolong(argv[++i], EXIM_HOSTNAME_MAX, "-C internal hostname"), TRUE);
2819 continue_host_address = string_copy_taint(exim_str_fail_toolong(argv[++i], EXIM_IPADDR_MAX, "-C internal hostaddr"), TRUE);
2820 continue_sequence = Uatoi(argv[++i]);
2821 msg_action = MSG_DELIVER;
2822 msg_action_arg = ++i;
2823 forced_delivery = TRUE;
2824 queue_run_pid = passed_qr_pid;
2825 queue_run_pipe = passed_qr_pipe;
2827 if (!mac_ismsgid(argv[i]))
2828 exim_fail("exim: malformed message id %s after -MC option\n",
2831 /* Set up $sending_ip_address and $sending_port, unless proxied */
2833 if (!continue_proxy_cipher)
2834 if (getsockname(fileno(stdin), (struct sockaddr *)(&interface_sock),
2836 sending_ip_address = host_ntoa(-1, &interface_sock, NULL,
2839 exim_fail("exim: getsockname() failed after -MC option: %s\n",
2842 testharness_pause_ms(500);
2846 else if (*argrest == 'C' && argrest[1] && !argrest[2])
2850 /* -MCA: set the smtp_authenticated flag; this is useful only when it
2851 precedes -MC (see above). The flag indicates that the host to which
2852 Exim is connected has accepted an AUTH sequence. */
2854 case 'A': f.smtp_authenticated = TRUE; break;
2856 /* -MCD: set the smtp_use_dsn flag; this indicates that the host
2857 that exim is connected to supports the esmtp extension DSN */
2859 case 'D': smtp_peer_options |= OPTION_DSN; break;
2861 /* -MCd: for debug, set a process-purpose string */
2863 case 'd': if (++i < argc)
2864 process_purpose = string_copy_taint(exim_str_fail_toolong(argv[i], EXIM_DRIVERNAME_MAX, "-MCd"), TRUE);
2868 /* -MCG: set the queue name, to a non-default value. Arguably, anything
2869 from the commandline should be tainted - but we will need an untainted
2870 value for the spoolfile when doing a -odi delivery process. */
2872 case 'G': if (++i < argc) queue_name = string_copy_taint(exim_str_fail_toolong(argv[i], EXIM_DRIVERNAME_MAX, "-MCG"), FALSE);
2876 /* -MCK: the peer offered CHUNKING. Must precede -MC */
2878 case 'K': smtp_peer_options |= OPTION_CHUNKING; break;
2880 #ifdef EXPERIMENTAL_ESMTP_LIMITS
2881 /* -MCL: peer used LIMITS RCPTMAX and/or RCPTDOMAINMAX */
2882 case 'L': if (++i < argc) continue_limit_mail = Uatoi(argv[i]);
2884 if (++i < argc) continue_limit_rcpt = Uatoi(argv[i]);
2886 if (++i < argc) continue_limit_rcptdom = Uatoi(argv[i]);
2891 /* -MCP: set the smtp_use_pipelining flag; this is useful only when
2892 it preceded -MC (see above) */
2894 case 'P': smtp_peer_options |= OPTION_PIPE; break;
2896 #ifdef SUPPORT_SOCKS
2897 /* -MCp: Socks proxy in use; nearside IP, port, external IP, port */
2898 case 'p': proxy_session = TRUE;
2901 proxy_local_address = string_copy_taint(argv[i], TRUE);
2904 proxy_local_port = Uatoi(argv[i]);
2907 proxy_external_address = string_copy_taint(argv[i], TRUE);
2910 proxy_external_port = Uatoi(argv[i]);
2916 /* -MCQ: pass on the pid of the queue-running process that started
2917 this chain of deliveries and the fd of its synchronizing pipe; this
2918 is useful only when it precedes -MC (see above) */
2920 case 'Q': if (++i < argc) passed_qr_pid = (pid_t)(Uatol(argv[i]));
2922 if (++i < argc) passed_qr_pipe = (int)(Uatol(argv[i]));
2926 /* -MCq: do a quota check on the given recipient for the given size
2927 of message. Separate from -MC. */
2928 case 'q': rcpt_verify_quota = TRUE;
2929 if (++i < argc) message_size = Uatoi(argv[i]);
2933 /* -MCS: set the smtp_use_size flag; this is useful only when it
2934 precedes -MC (see above) */
2936 case 'S': smtp_peer_options |= OPTION_SIZE; break;
2939 /* -MCs: used with -MCt; SNI was sent */
2940 /* -MCr: ditto, DANE */
2943 case 's': if (++i < argc)
2945 continue_proxy_sni = string_copy_taint(exim_str_fail_toolong(argv[i], EXIM_HOSTNAME_MAX, "-MCr/-MCs"), TRUE);
2946 if (argrest[1] == 'r') continue_proxy_dane = TRUE;
2951 /* -MCt: similar to -MCT below but the connection is still open
2952 via a proxy process which handles the TLS context and coding.
2953 Require three arguments for the proxied local address and port,
2954 and the TLS cipher. */
2956 case 't': if (++i < argc)
2957 sending_ip_address = string_copy_taint(exim_str_fail_toolong(argv[i], EXIM_IPADDR_MAX, "-MCt IP"), TRUE);
2960 sending_port = (int)(Uatol(argv[i]));
2963 continue_proxy_cipher = string_copy_taint(exim_str_fail_toolong(argv[i], EXIM_CIPHERNAME_MAX, "-MCt cipher"), TRUE);
2967 /* -MCT: set the tls_offered flag; this is useful only when it
2968 precedes -MC (see above). The flag indicates that the host to which
2969 Exim is connected has offered TLS support. */
2971 case 'T': smtp_peer_options |= OPTION_TLS; break;
2974 default: badarg = TRUE; break;
2979 /* -M[x]: various operations on the following list of message ids:
2980 -M deliver the messages, ignoring next retry times and thawing
2981 -Mc deliver the messages, checking next retry times, no thawing
2982 -Mf freeze the messages
2983 -Mg give up on the messages
2984 -Mt thaw the messages
2985 -Mrm remove the messages
2986 In the above cases, this must be the last option. There are also the
2987 following options which are followed by a single message id, and which
2988 act on that message. Some of them use the "recipient" addresses as well.
2989 -Mar add recipient(s)
2990 -MG move to a different queue
2991 -Mmad mark all recipients delivered
2992 -Mmd mark recipients(s) delivered
2994 -Mset load a message for use with -be
2996 -Mvc show copy (of whole message, in RFC 2822 format)
3003 msg_action = MSG_DELIVER;
3004 forced_delivery = f.deliver_force_thaw = TRUE;
3006 else if (Ustrcmp(argrest, "ar") == 0)
3008 msg_action = MSG_ADD_RECIPIENT;
3009 one_msg_action = TRUE;
3011 else if (Ustrcmp(argrest, "c") == 0) msg_action = MSG_DELIVER;
3012 else if (Ustrcmp(argrest, "es") == 0)
3014 msg_action = MSG_EDIT_SENDER;
3015 one_msg_action = TRUE;
3017 else if (Ustrcmp(argrest, "f") == 0) msg_action = MSG_FREEZE;
3018 else if (Ustrcmp(argrest, "g") == 0)
3020 msg_action = MSG_DELIVER;
3021 deliver_give_up = TRUE;
3023 else if (Ustrcmp(argrest, "G") == 0)
3025 msg_action = MSG_SETQUEUE;
3026 queue_name_dest = string_copy_taint(exim_str_fail_toolong(argv[++i], EXIM_DRIVERNAME_MAX, "-MG"), TRUE);
3028 else if (Ustrcmp(argrest, "mad") == 0)
3030 msg_action = MSG_MARK_ALL_DELIVERED;
3032 else if (Ustrcmp(argrest, "md") == 0)
3034 msg_action = MSG_MARK_DELIVERED;
3035 one_msg_action = TRUE;
3037 else if (Ustrcmp(argrest, "rm") == 0) msg_action = MSG_REMOVE;
3038 else if (Ustrcmp(argrest, "set") == 0)
3040 msg_action = MSG_LOAD;
3041 one_msg_action = TRUE;
3043 else if (Ustrcmp(argrest, "t") == 0) msg_action = MSG_THAW;
3044 else if (Ustrcmp(argrest, "vb") == 0)
3046 msg_action = MSG_SHOW_BODY;
3047 one_msg_action = TRUE;
3049 else if (Ustrcmp(argrest, "vc") == 0)
3051 msg_action = MSG_SHOW_COPY;
3052 one_msg_action = TRUE;
3054 else if (Ustrcmp(argrest, "vh") == 0)
3056 msg_action = MSG_SHOW_HEADER;
3057 one_msg_action = TRUE;
3059 else if (Ustrcmp(argrest, "vl") == 0)
3061 msg_action = MSG_SHOW_LOG;
3062 one_msg_action = TRUE;
3064 else { badarg = TRUE; break; }
3066 /* All the -Mxx options require at least one message id. */
3068 msg_action_arg = i + 1;
3069 if (msg_action_arg >= argc)
3070 exim_fail("exim: no message ids given after %s option\n", arg);
3072 /* Some require only message ids to follow */
3074 if (!one_msg_action)
3076 for (int j = msg_action_arg; j < argc; j++) if (!mac_ismsgid(argv[j]))
3077 exim_fail("exim: malformed message id %s after %s option\n",
3079 goto END_ARG; /* Remaining args are ids */
3082 /* Others require only one message id, possibly followed by addresses,
3083 which will be handled as normal arguments. */
3087 if (!mac_ismsgid(argv[msg_action_arg]))
3088 exim_fail("exim: malformed message id %s after %s option\n",
3089 argv[msg_action_arg], arg);
3095 /* Some programs seem to call the -om option without the leading o;
3096 for sendmail it askes for "me too". Exim always does this. */
3099 if (*argrest) badarg = TRUE;
3103 /* -N: don't do delivery - a debugging option that stops transports doing
3104 their thing. It implies debugging at the D_v level. */
3109 f.dont_deliver = TRUE;
3110 debug_selector |= D_v;
3111 debug_file = stderr;
3117 /* -n: This means "don't alias" in sendmail, apparently.
3118 For normal invocations, it has no effect.
3119 It may affect some other options. */
3125 /* -O: Just ignore it. In sendmail, apparently -O option=value means set
3126 option to the specified value. This form uses long names. We need to handle
3127 -O option=value and -Ooption=value. */
3132 exim_fail("exim: string expected after -O\n");
3138 /* -oA: Set an argument for the bi command (sendmail's "alternate alias
3141 if (!*(alias_arg = argrest))
3142 if (i+1 < argc) alias_arg = argv[++i];
3143 else exim_fail("exim: string expected after -oA\n");
3146 /* -oB: Set a connection message max value for remote deliveries */
3149 uschar * p = argrest;
3151 if (i+1 < argc && isdigit((argv[i+1][0])))
3155 connection_max_messages = 1;
3162 exim_fail("exim: number expected after -oB\n");
3163 connection_max_messages = Uatoi(p);
3168 /* -odb: background delivery */
3171 if (Ustrcmp(argrest, "b") == 0)
3173 f.synchronous_delivery = FALSE;
3174 arg_queue_only = FALSE;
3175 queue_only_set = TRUE;
3178 /* -odd: testsuite-only: add no inter-process delays */
3180 else if (Ustrcmp(argrest, "d") == 0)
3181 f.testsuite_delays = FALSE;
3183 /* -odf: foreground delivery (smail-compatible option); same effect as
3184 -odi: interactive (synchronous) delivery (sendmail-compatible option)
3187 else if (Ustrcmp(argrest, "f") == 0 || Ustrcmp(argrest, "i") == 0)
3189 f.synchronous_delivery = TRUE;
3190 arg_queue_only = FALSE;
3191 queue_only_set = TRUE;
3194 /* -odq: queue only */
3196 else if (Ustrcmp(argrest, "q") == 0)
3198 f.synchronous_delivery = FALSE;
3199 arg_queue_only = TRUE;
3200 queue_only_set = TRUE;
3203 /* -odqs: queue SMTP only - do local deliveries and remote routing,
3204 but no remote delivery */
3206 else if (Ustrcmp(argrest, "qs") == 0)
3208 f.queue_smtp = TRUE;
3209 arg_queue_only = FALSE;
3210 queue_only_set = TRUE;
3215 /* -oex: Sendmail error flags. As these are also accepted without the
3216 leading -o prefix, for compatibility with vacation and other callers,
3217 they are handled with -e above. */
3219 /* -oi: Set flag so dot doesn't end non-SMTP input (same as -i)
3220 -oitrue: Another sendmail syntax for the same */
3223 if (!*argrest || Ustrcmp(argrest, "true") == 0)
3228 /* -oM*: Set various characteristics for an incoming message; actually
3229 acted on for trusted callers only. */
3234 exim_fail("exim: data expected after -oM%s\n", argrest);
3236 /* -oMa: Set sender host address */
3238 if (Ustrcmp(argrest, "a") == 0)
3239 sender_host_address = string_copy_taint(exim_str_fail_toolong(argv[++i], EXIM_IPADDR_MAX, "-oMa"), TRUE);
3241 /* -oMaa: Set authenticator name */
3243 else if (Ustrcmp(argrest, "aa") == 0)
3244 sender_host_authenticated = string_copy_taint(exim_str_fail_toolong(argv[++i], EXIM_DRIVERNAME_MAX, "-oMaa"), TRUE);
3246 /* -oMas: setting authenticated sender */
3248 else if (Ustrcmp(argrest, "as") == 0)
3249 authenticated_sender = string_copy_taint(exim_str_fail_toolong(argv[++i], EXIM_EMAILADDR_MAX, "-oMas"), TRUE);
3251 /* -oMai: setting authenticated id */
3253 else if (Ustrcmp(argrest, "ai") == 0)
3254 authenticated_id = string_copy_taint(exim_str_fail_toolong(argv[++i], EXIM_EMAILADDR_MAX, "-oMas"), TRUE);
3256 /* -oMi: Set incoming interface address */
3258 else if (Ustrcmp(argrest, "i") == 0)
3259 interface_address = string_copy_taint(exim_str_fail_toolong(argv[++i], EXIM_IPADDR_MAX, "-oMi"), TRUE);
3261 /* -oMm: Message reference */
3263 else if (Ustrcmp(argrest, "m") == 0)
3265 if (!mac_ismsgid(argv[i+1]))
3266 exim_fail("-oMm must be a valid message ID\n");
3267 if (!f.trusted_config)
3268 exim_fail("-oMm must be called by a trusted user/config\n");
3269 message_reference = argv[++i];
3272 /* -oMr: Received protocol */
3274 else if (Ustrcmp(argrest, "r") == 0)
3276 if (received_protocol)
3277 exim_fail("received_protocol is set already\n");
3279 received_protocol = string_copy_taint(exim_str_fail_toolong(argv[++i], EXIM_DRIVERNAME_MAX, "-oMr"), TRUE);
3281 /* -oMs: Set sender host name */
3283 else if (Ustrcmp(argrest, "s") == 0)
3284 sender_host_name = string_copy_taint(exim_str_fail_toolong(argv[++i], EXIM_HOSTNAME_MAX, "-oMs"), TRUE);
3286 /* -oMt: Set sender ident */
3288 else if (Ustrcmp(argrest, "t") == 0)
3290 sender_ident_set = TRUE;
3291 sender_ident = string_copy_taint(exim_str_fail_toolong(argv[++i], EXIM_IDENTUSER_MAX, "-oMt"), TRUE);
3294 /* Else a bad argument */
3301 /* -om: Me-too flag for aliases. Exim always does this. Some programs
3302 seem to call this as -m (undocumented), so that is also accepted (see
3304 /* -oo: An ancient flag for old-style addresses which still seems to
3305 crop up in some calls (see in SCO). */
3309 if (*argrest) badarg = TRUE;
3312 /* -oP <name>: set pid file path for daemon
3313 -oPX: delete pid file of daemon */
3316 if (!f.running_in_test_harness && real_uid != root_uid && real_uid != exim_uid)
3317 exim_fail("exim: only uid=%d or uid=%d can use -oP and -oPX "
3318 "(uid=%d euid=%d | %d)\n",
3319 root_uid, exim_uid, getuid(), geteuid(), real_uid);
3320 if (!*argrest) override_pid_file_path = argv[++i];
3321 else if (Ustrcmp(argrest, "X") == 0) delete_pid_file();
3326 /* -or <n>: set timeout for non-SMTP acceptance
3327 -os <n>: set timeout for SMTP acceptance */
3332 int * tp = argrest[-1] == 'r'
3333 ? &arg_receive_timeout : &arg_smtp_receive_timeout;
3335 *tp = readconf_readtime(argrest, 0, FALSE);
3336 else if (i+1 < argc)
3337 *tp = readconf_readtime(argv[++i], 0, FALSE);
3340 exim_fail("exim: bad time value %s: abandoned\n", argv[i]);
3344 /* -oX <list>: Override local_interfaces and/or default daemon ports */
3345 /* Limits: Is there a real limit we want here? 1024 is very arbitrary. */
3348 if (*argrest) badarg = TRUE;
3349 else override_local_interfaces = string_copy_taint(exim_str_fail_toolong(argv[++i], 1024, "-oX"), TRUE);
3352 /* -oY: Override creation of daemon notifier socket */
3355 if (*argrest) badarg = TRUE;
3356 else notifier_socket = NULL;
3359 /* Unknown -o argument */
3367 /* -ps: force Perl startup; -pd force delayed Perl startup */
3371 if (*argrest == 's' && argrest[1] == 0)
3373 perl_start_option = 1;
3376 if (*argrest == 'd' && argrest[1] == 0)
3378 perl_start_option = -1;
3383 /* -panythingelse is taken as the Sendmail-compatible argument -prval:sval,
3384 which sets the host protocol and host name */
3387 if (i+1 < argc) argrest = argv[++i]; else { badarg = TRUE; break; }
3391 uschar * hn = Ustrchr(argrest, ':');
3393 if (received_protocol)
3394 exim_fail("received_protocol is set already\n");
3397 received_protocol = string_copy_taint(exim_str_fail_toolong(argrest, EXIM_DRIVERNAME_MAX, "-p<protocol>"), TRUE);
3400 (void) exim_str_fail_toolong(argrest, (EXIM_DRIVERNAME_MAX+1+EXIM_HOSTNAME_MAX), "-p<protocol>:<host>");
3401 received_protocol = string_copyn_taint(argrest, hn - argrest, TRUE);
3402 sender_host_name = string_copy_taint(hn + 1, TRUE);
3409 receiving_message = FALSE;
3410 if (queue_interval >= 0)
3411 exim_fail("exim: -q specified more than once\n");
3413 /* -qq...: Do queue runs in a 2-stage manner */
3415 if (*argrest == 'q')
3417 f.queue_2stage = TRUE;
3421 /* -qi...: Do only first (initial) deliveries */
3423 if (*argrest == 'i')
3425 f.queue_run_first_delivery = TRUE;
3429 /* -qf...: Run the queue, forcing deliveries
3430 -qff..: Ditto, forcing thawing as well */
3432 if (*argrest == 'f')
3434 f.queue_run_force = TRUE;
3435 if (*++argrest == 'f')
3437 f.deliver_force_thaw = TRUE;
3442 /* -q[f][f]l...: Run the queue only on local deliveries */
3444 if (*argrest == 'l')
3446 f.queue_run_local = TRUE;
3450 /* -q[f][f][l][G<name>]... Work on the named queue */
3452 if (*argrest == 'G')
3455 for (argrest++, i = 0; argrest[i] && argrest[i] != '/'; ) i++;
3456 exim_len_fail_toolong(i, EXIM_DRIVERNAME_MAX, "-q*G<name>");
3457 queue_name = string_copyn(argrest, i);
3459 if (*argrest == '/') argrest++;
3462 /* -q[f][f][l][G<name>]: Run the queue, optionally forced, optionally local
3463 only, optionally named, optionally starting from a given message id. */
3465 if (!(list_queue || count_queue))
3467 && (i + 1 >= argc || argv[i+1][0] == '-' || mac_ismsgid(argv[i+1])))
3470 if (i+1 < argc && mac_ismsgid(argv[i+1]))
3471 start_queue_run_id = string_copy_taint(argv[++i], TRUE);
3472 if (i+1 < argc && mac_ismsgid(argv[i+1]))
3473 stop_queue_run_id = string_copy_taint(argv[++i], TRUE);
3476 /* -q[f][f][l][G<name>/]<n>: Run the queue at regular intervals, optionally
3477 forced, optionally local only, optionally named. */
3479 else if ((queue_interval = readconf_readtime(*argrest ? argrest : argv[++i],
3481 exim_fail("exim: bad time value %s: abandoned\n", argv[i]);
3485 case 'R': /* Synonymous with -qR... */
3487 const uschar *tainted_selectstr;
3489 receiving_message = FALSE;
3491 /* -Rf: As -R (below) but force all deliveries,
3492 -Rff: Ditto, but also thaw all frozen messages,
3493 -Rr: String is regex
3494 -Rrf: Regex and force
3495 -Rrff: Regex and force and thaw
3497 in all cases provided there are no further characters in this
3501 for (int i = 0; i < nelem(rsopts); i++)
3502 if (Ustrcmp(argrest, rsopts[i]) == 0)
3504 if (i != 2) f.queue_run_force = TRUE;
3505 if (i >= 2) f.deliver_selectstring_regex = TRUE;
3506 if (i == 1 || i == 4) f.deliver_force_thaw = TRUE;
3507 argrest += Ustrlen(rsopts[i]);
3510 /* -R: Set string to match in addresses for forced queue run to
3511 pick out particular messages. */
3513 /* Avoid attacks from people providing very long strings, and do so before
3516 tainted_selectstr = argrest;
3517 else if (i+1 < argc)
3518 tainted_selectstr = argv[++i];
3520 exim_fail("exim: string expected after -R\n");
3521 deliver_selectstring = string_copy_taint(exim_str_fail_toolong(tainted_selectstr, EXIM_EMAILADDR_MAX, "-R"), TRUE);
3525 /* -r: an obsolete synonym for -f (see above) */
3528 /* -S: Like -R but works on sender. */
3530 case 'S': /* Synonymous with -qS... */
3532 const uschar *tainted_selectstr;
3534 receiving_message = FALSE;
3536 /* -Sf: As -S (below) but force all deliveries,
3537 -Sff: Ditto, but also thaw all frozen messages,
3538 -Sr: String is regex
3539 -Srf: Regex and force
3540 -Srff: Regex and force and thaw
3542 in all cases provided there are no further characters in this
3546 for (int i = 0; i < nelem(rsopts); i++)
3547 if (Ustrcmp(argrest, rsopts[i]) == 0)
3549 if (i != 2) f.queue_run_force = TRUE;
3550 if (i >= 2) f.deliver_selectstring_sender_regex = TRUE;
3551 if (i == 1 || i == 4) f.deliver_force_thaw = TRUE;
3552 argrest += Ustrlen(rsopts[i]);
3555 /* -S: Set string to match in addresses for forced queue run to
3556 pick out particular messages. */
3559 tainted_selectstr = argrest;
3560 else if (i+1 < argc)
3561 tainted_selectstr = argv[++i];
3563 exim_fail("exim: string expected after -S\n");
3564 deliver_selectstring_sender = string_copy_taint(exim_str_fail_toolong(tainted_selectstr, EXIM_EMAILADDR_MAX, "-S"), TRUE);
3568 /* -Tqt is an option that is exclusively for use by the testing suite.
3569 It is not recognized in other circumstances. It allows for the setting up
3570 of explicit "queue times" so that various warning/retry things can be
3571 tested. Otherwise variability of clock ticks etc. cause problems. */
3574 if (f.running_in_test_harness && Ustrcmp(argrest, "qt") == 0)
3575 fudged_queue_times = string_copy_taint(argv[++i], TRUE);
3580 /* -t: Set flag to extract recipients from body of message. */
3583 if (!*argrest) extract_recipients = TRUE;
3585 /* -ti: Set flag to extract recipients from body of message, and also
3586 specify that dot does not end the message. */
3588 else if (Ustrcmp(argrest, "i") == 0)
3590 extract_recipients = TRUE;
3594 /* -tls-on-connect: don't wait for STARTTLS (for old clients) */
3597 else if (Ustrcmp(argrest, "ls-on-connect") == 0) tls_in.on_connect = TRUE;
3604 /* -U: This means "initial user submission" in sendmail, apparently. The
3605 doc claims that in future sendmail may refuse syntactically invalid
3606 messages instead of fixing them. For the moment, we just ignore it. */
3612 /* -v: verify things - this is a very low-level debugging */
3617 debug_selector |= D_v;
3618 debug_file = stderr;
3624 /* -x: AIX uses this to indicate some fancy 8-bit character stuff:
3626 The -x flag tells the sendmail command that mail from a local
3627 mail program has National Language Support (NLS) extended characters
3628 in the body of the mail item. The sendmail command can send mail with
3629 extended NLS characters across networks that normally corrupts these
3632 As Exim is 8-bit clean, it just ignores this flag. */
3635 if (*argrest) badarg = TRUE;
3638 /* -X: in sendmail: takes one parameter, logfile, and sends debugging
3639 logs to that file. We swallow the parameter and otherwise ignore it. */
3644 exim_fail("exim: string expected after -X\n");
3647 /* -z: a line of text to log */
3652 log_oneline = string_copy_taint(exim_str_fail_toolong(argv[i], 2048, "-z logtext"), TRUE);
3654 exim_fail("exim: file name expected after %s\n", argv[i-1]);
3657 /* All other initial characters are errors */
3662 } /* End of high-level switch statement */
3664 /* Failed to recognize the option, or syntax error */
3667 exim_fail("exim abandoned: unknown, malformed, or incomplete "
3668 "option %s\n", arg);
3672 /* If -R or -S have been specified without -q, assume a single queue run. */
3674 if ( (deliver_selectstring || deliver_selectstring_sender)
3675 && queue_interval < 0)
3680 store_pool = old_pool;
3683 /* If usage_wanted is set we call the usage function - which never returns */
3684 if (usage_wanted) exim_usage(called_as);
3686 /* Arguments have been processed. Check for incompatibilities. */
3687 if ( ( (smtp_input || extract_recipients || recipients_arg < argc)
3688 && ( f.daemon_listen || queue_interval >= 0 || bi_option
3689 || test_retry_arg >= 0 || test_rewrite_arg >= 0
3690 || filter_test != FTEST_NONE
3691 || msg_action_arg > 0 && !one_msg_action
3693 || ( msg_action_arg > 0
3694 && ( f.daemon_listen || queue_interval > 0 || list_options
3695 || checking && msg_action != MSG_LOAD
3696 || bi_option || test_retry_arg >= 0 || test_rewrite_arg >= 0
3698 || ( (f.daemon_listen || queue_interval > 0)
3699 && ( sender_address || list_options || list_queue || checking
3702 || f.daemon_listen && queue_interval == 0
3703 || f.inetd_wait_mode && queue_interval >= 0
3705 && ( checking || smtp_input || extract_recipients
3706 || filter_test != FTEST_NONE || bi_option
3708 || ( verify_address_mode
3709 && ( f.address_test_mode || smtp_input || extract_recipients
3710 || filter_test != FTEST_NONE || bi_option
3712 || ( f.address_test_mode
3713 && ( smtp_input || extract_recipients || filter_test != FTEST_NONE
3717 && (sender_address || filter_test != FTEST_NONE || extract_recipients)
3719 || deliver_selectstring && queue_interval < 0
3720 || msg_action == MSG_LOAD && (!expansion_test || expansion_test_message)
3722 exim_fail("exim: incompatible command-line options or arguments\n");
3724 /* If debugging is set up, set the file and the file descriptor to pass on to
3725 child processes. It should, of course, be 2 for stderr. Also, force the daemon
3726 to run in the foreground. */
3728 if (debug_selector != 0)
3730 debug_file = stderr;
3731 debug_fd = fileno(debug_file);
3732 f.background_daemon = FALSE;
3733 testharness_pause_ms(100); /* lets caller finish */
3734 if (debug_selector != D_v) /* -v only doesn't show this */
3736 debug_printf("Exim version %s uid=%ld gid=%ld pid=%d D=%x\n",
3737 version_string, (long int)real_uid, (long int)real_gid, (int)getpid(),
3739 if (!version_printed)
3740 show_whats_supported(stderr);
3744 /* When started with root privilege, ensure that the limits on the number of
3745 open files and the number of processes (where that is accessible) are
3746 sufficiently large, or are unset, in case Exim has been called from an
3747 environment where the limits are screwed down. Not all OS have the ability to
3748 change some of these limits. */
3752 DEBUG(D_any) debug_print_ids(US"Exim has no root privilege:");
3758 #ifdef RLIMIT_NOFILE
3759 if (getrlimit(RLIMIT_NOFILE, &rlp) < 0)
3761 log_write(0, LOG_MAIN|LOG_PANIC, "getrlimit(RLIMIT_NOFILE) failed: %s",
3763 rlp.rlim_cur = rlp.rlim_max = 0;
3766 /* I originally chose 1000 as a nice big number that was unlikely to
3767 be exceeded. It turns out that some older OS have a fixed upper limit of
3770 if (rlp.rlim_cur < 1000)
3772 rlp.rlim_cur = rlp.rlim_max = 1000;
3773 if (setrlimit(RLIMIT_NOFILE, &rlp) < 0)
3775 rlp.rlim_cur = rlp.rlim_max = 256;
3776 if (setrlimit(RLIMIT_NOFILE, &rlp) < 0)
3777 log_write(0, LOG_MAIN|LOG_PANIC, "setrlimit(RLIMIT_NOFILE) failed: %s",
3784 if (getrlimit(RLIMIT_NPROC, &rlp) < 0)
3786 log_write(0, LOG_MAIN|LOG_PANIC, "getrlimit(RLIMIT_NPROC) failed: %s",
3788 rlp.rlim_cur = rlp.rlim_max = 0;
3791 # ifdef RLIM_INFINITY
3792 if (rlp.rlim_cur != RLIM_INFINITY && rlp.rlim_cur < 1000)
3794 rlp.rlim_cur = rlp.rlim_max = RLIM_INFINITY;
3796 if (rlp.rlim_cur < 1000)
3798 rlp.rlim_cur = rlp.rlim_max = 1000;
3800 if (setrlimit(RLIMIT_NPROC, &rlp) < 0)
3801 log_write(0, LOG_MAIN|LOG_PANIC, "setrlimit(RLIMIT_NPROC) failed: %s",
3807 /* Exim is normally entered as root (but some special configurations are
3808 possible that don't do this). However, it always spins off sub-processes that
3809 set their uid and gid as required for local delivery. We don't want to pass on
3810 any extra groups that root may belong to, so we want to get rid of them all at
3813 We need to obey setgroups() at this stage, before possibly giving up root
3814 privilege for a changed configuration file, but later on we might need to
3815 check on the additional groups for the admin user privilege - can't do that
3816 till after reading the config, which might specify the exim gid. Therefore,
3817 save the group list here first. */
3819 if ((group_count = getgroups(nelem(group_list), group_list)) < 0)
3820 exim_fail("exim: getgroups() failed: %s\n", strerror(errno));
3822 /* There is a fundamental difference in some BSD systems in the matter of
3823 groups. FreeBSD and BSDI are known to be different; NetBSD and OpenBSD are
3824 known not to be different. On the "different" systems there is a single group
3825 list, and the first entry in it is the current group. On all other versions of
3826 Unix there is a supplementary group list, which is in *addition* to the current
3827 group. Consequently, to get rid of all extraneous groups on a "standard" system
3828 you pass over 0 groups to setgroups(), while on a "different" system you pass
3829 over a single group - the current group, which is always the first group in the
3830 list. Calling setgroups() with zero groups on a "different" system results in
3831 an error return. The following code should cope with both types of system.
3833 Unfortunately, recent MacOS, which should be a FreeBSD, "helpfully" succeeds
3834 the "setgroups() with zero groups" - and changes the egid.
3835 Thanks to that we had to stash the original_egid above, for use below
3836 in the call to exim_setugid().
3838 However, if this process isn't running as root, setgroups() can't be used
3839 since you have to be root to run it, even if throwing away groups.
3840 Except, sigh, for Hurd - where you can.
3841 Not being root here happens only in some unusual configurations. */
3844 #ifndef OS_SETGROUPS_ZERO_DROPS_ALL
3845 && setgroups(0, NULL) != 0
3847 && setgroups(1, group_list) != 0)
3848 exim_fail("exim: setgroups() failed: %s\n", strerror(errno));
3850 /* If the configuration file name has been altered by an argument on the
3851 command line (either a new file name or a macro definition) and the caller is
3852 not root, or if this is a filter testing run, remove any setuid privilege the
3853 program has and run as the underlying user.
3855 The exim user is locked out of this, which severely restricts the use of -C
3858 Otherwise, set the real ids to the effective values (should be root unless run
3859 from inetd, which it can either be root or the exim uid, if one is configured).
3861 There is a private mechanism for bypassing some of this, in order to make it
3862 possible to test lots of configurations automatically, without having either to
3863 recompile each time, or to patch in an actual configuration file name and other
3864 values (such as the path name). If running in the test harness, pretend that
3865 configuration file changes and macro definitions haven't happened. */
3868 (!f.trusted_config || /* Config changed, or */
3869 !macros_trusted(opt_D_used)) && /* impermissible macros and */
3870 real_uid != root_uid && /* Not root, and */
3871 !f.running_in_test_harness /* Not fudged */
3873 expansion_test /* expansion testing */
3875 filter_test != FTEST_NONE) /* Filter testing */
3877 setgroups(group_count, group_list);
3878 exim_setugid(real_uid, real_gid, FALSE,
3879 US"-C, -D, -be or -bf forces real uid");
3880 removed_privilege = TRUE;
3882 /* In the normal case when Exim is called like this, stderr is available
3883 and should be used for any logging information because attempts to write
3884 to the log will usually fail. To arrange this, we unset really_exim. However,
3885 if no stderr is available there is no point - we might as well have a go
3886 at the log (if it fails, syslog will be written).
3888 Note that if the invoker is Exim, the logs remain available. Messing with
3889 this causes unlogged successful deliveries. */
3891 if (log_stderr && real_uid != exim_uid)
3892 f.really_exim = FALSE;
3895 /* Privilege is to be retained for the moment. It may be dropped later,
3896 depending on the job that this Exim process has been asked to do. For now, set
3897 the real uid to the effective so that subsequent re-execs of Exim are done by a
3901 exim_setugid(geteuid(), original_egid, FALSE, US"forcing real = effective");
3903 /* If testing a filter, open the file(s) now, before wasting time doing other
3904 setups and reading the message. */
3906 if (filter_test & FTEST_SYSTEM)
3907 if ((filter_sfd = Uopen(filter_test_sfile, O_RDONLY, 0)) < 0)
3908 exim_fail("exim: failed to open %s: %s\n", filter_test_sfile,
3911 if (filter_test & FTEST_USER)
3912 if ((filter_ufd = Uopen(filter_test_ufile, O_RDONLY, 0)) < 0)
3913 exim_fail("exim: failed to open %s: %s\n", filter_test_ufile,
3916 /* Initialise lookup_list
3917 If debugging, already called above via version reporting.
3918 In either case, we initialise the list of available lookups while running
3919 as root. All dynamically modules are loaded from a directory which is
3920 hard-coded into the binary and is code which, if not a module, would be
3921 part of Exim already. Ability to modify the content of the directory
3922 is equivalent to the ability to modify a setuid binary!
3924 This needs to happen before we read the main configuration. */
3927 /*XXX this excrescence could move to the testsuite standard config setup file */
3929 if (f.running_in_test_harness) smtputf8_advertise_hosts = NULL;
3932 /* Read the main runtime configuration data; this gives up if there
3933 is a failure. It leaves the configuration file open so that the subsequent
3934 configuration data for delivery can be read if needed.
3936 NOTE: immediately after opening the configuration file we change the working
3937 directory to "/"! Later we change to $spool_directory. We do it there, because
3938 during readconf_main() some expansion takes place already. */
3940 /* Store the initial cwd before we change directories. Can be NULL if the
3941 dir has already been unlinked. */
3942 initial_cwd = os_getcwd(NULL, 0);
3943 if (!initial_cwd && errno)
3944 exim_fail("exim: getting initial cwd failed: %s\n", strerror(errno));
3946 if (initial_cwd && (strlen(CCS initial_cwd) >= BIG_BUFFER_SIZE))
3947 exim_fail("exim: initial cwd is far too long (%d)\n", Ustrlen(CCS initial_cwd));
3950 -be[m] expansion test -
3951 -b[fF] filter test new
3953 -bmalware malware_test_file new
3955 -brw rewrite test new
3957 -bv[s] address verify -
3959 -bP <option> (except -bP config, which sets list_config)
3961 If any of these options is set, we suppress warnings about configuration
3962 issues (currently about tls_advertise_hosts and keep_environment not being
3966 int old_pool = store_pool;
3967 #ifdef MEASURE_TIMING
3968 struct timeval t0, diff;
3969 (void)gettimeofday(&t0, NULL);
3972 store_pool = POOL_CONFIG;
3973 readconf_main(checking || list_options);
3974 store_pool = old_pool;
3976 #ifdef MEASURE_TIMING
3977 report_time_since(&t0, US"readconf_main (delta)");
3981 /* Now in directory "/" */
3983 if (cleanup_environment() == FALSE)
3984 log_write(0, LOG_PANIC_DIE, "Can't cleanup environment");
3987 /* If an action on specific messages is requested, or if a daemon or queue
3988 runner is being started, we need to know if Exim was called by an admin user.
3989 This is the case if the real user is root or exim, or if the real group is
3990 exim, or if one of the supplementary groups is exim or a group listed in
3991 admin_groups. We don't fail all message actions immediately if not admin_user,
3992 since some actions can be performed by non-admin users. Instead, set admin_user
3993 for later interrogation. */
3995 if (real_uid == root_uid || real_uid == exim_uid || real_gid == exim_gid)
3996 f.admin_user = TRUE;
3998 for (int i = 0; i < group_count && !f.admin_user; i++)
3999 if (group_list[i] == exim_gid)
4000 f.admin_user = TRUE;
4001 else if (admin_groups)
4002 for (int j = 1; j <= (int)admin_groups[0] && !f.admin_user; j++)
4003 if (admin_groups[j] == group_list[i])
4004 f.admin_user = TRUE;
4006 /* Another group of privileged users are the trusted users. These are root,
4007 exim, and any caller matching trusted_users or trusted_groups. Trusted callers
4008 are permitted to specify sender_addresses with -f on the command line, and
4009 other message parameters as well. */
4011 if (real_uid == root_uid || real_uid == exim_uid)
4012 f.trusted_caller = TRUE;
4016 for (int i = 1; i <= (int)trusted_users[0] && !f.trusted_caller; i++)
4017 if (trusted_users[i] == real_uid)
4018 f.trusted_caller = TRUE;
4021 for (int i = 1; i <= (int)trusted_groups[0] && !f.trusted_caller; i++)
4022 if (trusted_groups[i] == real_gid)
4023 f.trusted_caller = TRUE;
4024 else for (int j = 0; j < group_count && !f.trusted_caller; j++)
4025 if (trusted_groups[i] == group_list[j])
4026 f.trusted_caller = TRUE;
4029 /* At this point, we know if the user is privileged and some command-line
4030 options become possibly impermissible, depending upon the configuration file. */
4032 if (checking && commandline_checks_require_admin && !f.admin_user)
4033 exim_fail("exim: those command-line flags are set to require admin\n");
4035 /* Handle the decoding of logging options. */
4037 decode_bits(log_selector, log_selector_size, log_notall,
4038 log_selector_string, log_options, log_options_count, US"log", 0);
4042 debug_printf("configuration file is %s\n", config_main_filename);
4043 debug_printf("log selectors =");
4044 for (int i = 0; i < log_selector_size; i++)
4045 debug_printf(" %08x", log_selector[i]);
4049 /* If domain literals are not allowed, check the sender address that was
4050 supplied with -f. Ditto for a stripped trailing dot. */
4054 if (sender_address[sender_address_domain] == '[' && !allow_domain_literals)
4055 exim_fail("exim: bad -f address \"%s\": domain literals not "
4056 "allowed\n", sender_address);
4057 if (f_end_dot && !strip_trailing_dot)
4058 exim_fail("exim: bad -f address \"%s.\": domain is malformed "
4059 "(trailing dot not allowed)\n", sender_address);
4062 /* See if an admin user overrode our logging. */
4064 if (cmdline_syslog_name)
4067 syslog_processname = cmdline_syslog_name;
4068 log_file_path = string_copy(CUS"syslog");
4071 /* not a panic, non-privileged users should not be able to spam paniclog */
4073 "exim: you lack sufficient privilege to specify syslog process name\n");
4075 /* Paranoia check of maximum lengths of certain strings. There is a check
4076 on the length of the log file path in log.c, which will come into effect
4077 if there are any calls to write the log earlier than this. However, if we
4078 get this far but the string is very long, it is better to stop now than to
4079 carry on and (e.g.) receive a message and then have to collapse. The call to
4080 log_write() from here will cause the ultimate panic collapse if the complete
4081 file name exceeds the buffer length. */
4083 if (Ustrlen(log_file_path) > 200)
4084 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
4085 "log_file_path is longer than 200 chars: aborting");
4087 if (Ustrlen(pid_file_path) > 200)
4088 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
4089 "pid_file_path is longer than 200 chars: aborting");
4091 if (Ustrlen(spool_directory) > 200)
4092 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
4093 "spool_directory is longer than 200 chars: aborting");
4095 /* Length check on the process name given to syslog for its TAG field,
4096 which is only permitted to be 32 characters or less. See RFC 3164. */
4098 if (Ustrlen(syslog_processname) > 32)
4099 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
4100 "syslog_processname is longer than 32 chars: aborting");
4105 log_write(0, LOG_MAIN, "%s", log_oneline);
4106 return EXIT_SUCCESS;
4109 return EXIT_FAILURE;
4111 /* In some operating systems, the environment variable TMPDIR controls where
4112 temporary files are created; Exim doesn't use these (apart from when delivering
4113 to MBX mailboxes), but called libraries such as DBM libraries may require them.
4114 If TMPDIR is found in the environment, reset it to the value defined in the
4115 EXIM_TMPDIR macro, if this macro is defined. For backward compatibility this
4116 macro may be called TMPDIR in old "Local/Makefile"s. It's converted to
4117 EXIM_TMPDIR by the build scripts.
4121 if (environ) for (uschar ** p = USS environ; *p; p++)
4122 if (Ustrncmp(*p, "TMPDIR=", 7) == 0 && Ustrcmp(*p+7, EXIM_TMPDIR) != 0)
4124 uschar * newp = store_malloc(Ustrlen(EXIM_TMPDIR) + 8);
4125 sprintf(CS newp, "TMPDIR=%s", EXIM_TMPDIR);
4127 DEBUG(D_any) debug_printf("reset TMPDIR=%s in environment\n", EXIM_TMPDIR);
4131 /* Timezone handling. If timezone_string is "utc", set a flag to cause all
4132 timestamps to be in UTC (gmtime() is used instead of localtime()). Otherwise,
4133 we may need to get rid of a bogus timezone setting. This can arise when Exim is
4134 called by a user who has set the TZ variable. This then affects the timestamps
4135 in log files and in Received: headers, and any created Date: header lines. The
4136 required timezone is settable in the configuration file, so nothing can be done
4137 about this earlier - but hopefully nothing will normally be logged earlier than
4138 this. We have to make a new environment if TZ is wrong, but don't bother if
4139 timestamps_utc is set, because then all times are in UTC anyway. */
4141 if (timezone_string && strcmpic(timezone_string, US"UTC") == 0)
4142 f.timestamps_utc = TRUE;
4145 uschar *envtz = US getenv("TZ");
4147 ? !timezone_string || Ustrcmp(timezone_string, envtz) != 0
4148 : timezone_string != NULL
4151 uschar **p = USS environ;
4155 if (environ) while (*p++) count++;
4156 if (!envtz) count++;
4157 newp = new = store_malloc(sizeof(uschar *) * (count + 1));
4158 if (environ) for (p = USS environ; *p; p++)
4159 if (Ustrncmp(*p, "TZ=", 3) != 0) *newp++ = *p;
4160 if (timezone_string)
4162 *newp = store_malloc(Ustrlen(timezone_string) + 4);
4163 sprintf(CS *newp++, "TZ=%s", timezone_string);
4168 DEBUG(D_any) debug_printf("Reset TZ to %s: time is %s\n", timezone_string,
4169 tod_stamp(tod_log));
4173 /* Handle the case when we have removed the setuid privilege because of -C or
4174 -D. This means that the caller of Exim was not root.
4176 There is a problem if we were running as the Exim user. The sysadmin may
4177 expect this case to retain privilege because "the binary was called by the
4178 Exim user", but it hasn't, because either the -D option set macros, or the
4179 -C option set a non-trusted configuration file. There are two possibilities:
4181 (1) If deliver_drop_privilege is set, Exim is not going to re-exec in order
4182 to do message deliveries. Thus, the fact that it is running as a
4183 non-privileged user is plausible, and might be wanted in some special
4184 configurations. However, really_exim will have been set false when
4185 privilege was dropped, to stop Exim trying to write to its normal log
4186 files. Therefore, re-enable normal log processing, assuming the sysadmin
4187 has set up the log directory correctly.
4189 (2) If deliver_drop_privilege is not set, the configuration won't work as
4190 apparently intended, and so we log a panic message. In order to retain
4191 root for -C or -D, the caller must either be root or be invoking a
4192 trusted configuration file (when deliver_drop_privilege is false). */
4194 if ( removed_privilege
4195 && (!f.trusted_config || opt_D_used)
4196 && real_uid == exim_uid)
4197 if (deliver_drop_privilege)
4198 f.really_exim = TRUE; /* let logging work normally */
4200 log_write(0, LOG_MAIN|LOG_PANIC,
4201 "exim user lost privilege for using %s option",
4202 f.trusted_config? "-D" : "-C");
4204 /* Start up Perl interpreter if Perl support is configured and there is a
4205 perl_startup option, and the configuration or the command line specifies
4206 initializing starting. Note that the global variables are actually called
4207 opt_perl_xxx to avoid clashing with perl's namespace (perl_*). */
4210 if (perl_start_option != 0)
4211 opt_perl_at_start = (perl_start_option > 0);
4212 if (opt_perl_at_start && opt_perl_startup != NULL)
4215 DEBUG(D_any) debug_printf("Starting Perl interpreter\n");
4216 if ((errstr = init_perl(opt_perl_startup)))
4217 exim_fail("exim: error in perl_startup code: %s\n", errstr);
4218 opt_perl_started = TRUE;
4220 #endif /* EXIM_PERL */
4222 /* Log the arguments of the call if the configuration file said so. This is
4223 a debugging feature for finding out what arguments certain MUAs actually use.
4224 Don't attempt it if logging is disabled, or if listing variables or if
4225 verifying/testing addresses or expansions. */
4227 if ( (debug_selector & D_any || LOGGING(arguments))
4228 && f.really_exim && !list_options && !checking)
4230 uschar *p = big_buffer;
4231 Ustrcpy(p, US"cwd= (failed)");
4238 snprintf(CS p, big_buffer_size - (p - big_buffer), "%s", CCS initial_cwd);
4239 p += Ustrlen(CCS p);
4242 (void)string_format(p, big_buffer_size - (p - big_buffer), " %d args:", argc);
4244 for (int i = 0; i < argc; i++)
4246 int len = Ustrlen(argv[i]);
4247 const uschar *printing;
4249 if (p + len + 8 >= big_buffer + big_buffer_size)
4251 Ustrcpy(p, US" ...");
4252 log_write(0, LOG_MAIN, "%s", big_buffer);
4253 Ustrcpy(big_buffer, US"...");
4256 printing = string_printing(argv[i]);
4257 if (!*printing) quote = US"\"";
4260 const uschar *pp = printing;
4262 while (*pp) if (isspace(*pp++)) { quote = US"\""; break; }
4264 p += sprintf(CS p, " %s%.*s%s", quote, (int)(big_buffer_size -
4265 (p - big_buffer) - 4), printing, quote);
4268 if (LOGGING(arguments))
4269 log_write(0, LOG_MAIN, "%s", big_buffer);
4271 debug_printf("%s\n", big_buffer);
4274 /* Set the working directory to be the top-level spool directory. We don't rely
4275 on this in the code, which always uses fully qualified names, but it's useful
4276 for core dumps etc. Don't complain if it fails - the spool directory might not
4277 be generally accessible and calls with the -C option (and others) have lost
4278 privilege by now. Before the chdir, we try to ensure that the directory exists.
4281 if (Uchdir(spool_directory) != 0)
4283 (void) directory_make(spool_directory, US"", SPOOL_DIRECTORY_MODE, FALSE);
4284 (void) Uchdir(spool_directory);
4287 /* Handle calls with the -bi option. This is a sendmail option to rebuild *the*
4288 alias file. Exim doesn't have such a concept, but this call is screwed into
4289 Sun's YP makefiles. Handle this by calling a configured script, as the real
4290 user who called Exim. The -oA option can be used to pass an argument to the
4295 (void) fclose(config_file);
4296 if (bi_command && *bi_command)
4300 argv[i++] = bi_command;
4301 if (alias_arg) argv[i++] = alias_arg;
4304 setgroups(group_count, group_list);
4305 exim_setugid(real_uid, real_gid, FALSE, US"running bi_command");
4307 DEBUG(D_exec) debug_printf("exec '%.256s' %s%.256s%s\n", argv[0],
4308 argv[1] ? "'" : "", argv[1] ? argv[1] : US"", argv[1] ? "'" : "");
4310 execv(CS argv[0], (char *const *)argv);
4311 exim_fail("exim: exec '%s' failed: %s\n", argv[0], strerror(errno));
4315 DEBUG(D_any) debug_printf("-bi used but bi_command not set; exiting\n");
4320 /* We moved the admin/trusted check to be immediately after reading the
4321 configuration file. We leave these prints here to ensure that syslog setup,
4322 logfile setup, and so on has already happened. */
4324 if (f.trusted_caller) DEBUG(D_any) debug_printf("trusted user\n");
4325 if (f.admin_user) DEBUG(D_any) debug_printf("admin user\n");
4327 /* Only an admin user may start the daemon or force a queue run in the default
4328 configuration, but the queue run restriction can be relaxed. Only an admin
4329 user may request that a message be returned to its sender forthwith. Only an
4330 admin user may specify a debug level greater than D_v (because it might show
4331 passwords, etc. in lookup queries). Only an admin user may request a queue
4332 count. Only an admin user can use the test interface to scan for email
4333 (because Exim will be in the spool dir and able to look at mails). */
4337 BOOL debugset = (debug_selector & ~D_v) != 0;
4338 if ( deliver_give_up || f.daemon_listen || malware_test_file
4339 || count_queue && queue_list_requires_admin
4340 || list_queue && queue_list_requires_admin
4341 || queue_interval >= 0 && prod_requires_admin
4342 || queue_name_dest && prod_requires_admin
4343 || debugset && !f.running_in_test_harness
4345 exim_fail("exim:%s permission denied\n", debugset ? " debugging" : "");
4348 /* If the real user is not root or the exim uid, the argument for passing
4349 in an open TCP/IP connection for another message is not permitted, nor is
4350 running with the -N option for any delivery action, unless this call to exim is
4351 one that supplied an input message, or we are using a patched exim for
4352 regression testing. */
4354 if ( real_uid != root_uid && real_uid != exim_uid
4355 && ( continue_hostname
4357 && (queue_interval >= 0 || f.daemon_listen || msg_action_arg > 0)
4359 && !f.running_in_test_harness
4361 exim_fail("exim: Permission denied\n");
4363 /* If the caller is not trusted, certain arguments are ignored when running for
4364 real, but are permitted when checking things (-be, -bv, -bt, -bh, -bf, -bF).
4365 Note that authority for performing certain actions on messages is tested in the
4366 queue_action() function. */
4368 if (!f.trusted_caller && !checking)
4370 sender_host_name = sender_host_address = interface_address =
4371 sender_ident = received_protocol = NULL;
4372 sender_host_port = interface_port = 0;
4373 sender_host_authenticated = authenticated_sender = authenticated_id = NULL;
4376 /* If a sender host address is set, extract the optional port number off the
4377 end of it and check its syntax. Do the same thing for the interface address.
4378 Exim exits if the syntax is bad. */
4382 if (sender_host_address)
4383 sender_host_port = check_port(sender_host_address);
4384 if (interface_address)
4385 interface_port = check_port(interface_address);
4388 /* If the caller is trusted, then they can use -G to suppress_local_fixups. */
4391 if (f.trusted_caller)
4393 f.suppress_local_fixups = f.suppress_local_fixups_default = TRUE;
4394 DEBUG(D_acl) debug_printf("suppress_local_fixups forced on by -G\n");
4397 exim_fail("exim: permission denied (-G requires a trusted user)\n");
4400 /* If an SMTP message is being received check to see if the standard input is a
4401 TCP/IP socket. If it is, we assume that Exim was called from inetd if the
4402 caller is root or the Exim user, or if the port is a privileged one. Otherwise,
4407 union sockaddr_46 inetd_sock;
4408 EXIM_SOCKLEN_T size = sizeof(inetd_sock);
4409 if (getpeername(0, (struct sockaddr *)(&inetd_sock), &size) == 0)
4411 int family = ((struct sockaddr *)(&inetd_sock))->sa_family;
4412 if (family == AF_INET || family == AF_INET6)
4414 union sockaddr_46 interface_sock;
4415 size = sizeof(interface_sock);
4417 if (getsockname(0, (struct sockaddr *)(&interface_sock), &size) == 0)
4418 interface_address = host_ntoa(-1, &interface_sock, NULL,
4421 if (host_is_tls_on_connect_port(interface_port)) tls_in.on_connect = TRUE;
4423 if (real_uid == root_uid || real_uid == exim_uid || interface_port < 1024)
4426 sender_host_address = host_ntoa(-1, (struct sockaddr *)(&inetd_sock),
4427 NULL, &sender_host_port);
4428 if (mua_wrapper) log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Input from "
4429 "inetd is not supported when mua_wrapper is set");
4433 "exim: Permission denied (unprivileged user, unprivileged port)\n");
4438 /* If the load average is going to be needed while receiving a message, get it
4439 now for those OS that require the first call to os_getloadavg() to be done as
4440 root. There will be further calls later for each message received. */
4442 #ifdef LOAD_AVG_NEEDS_ROOT
4443 if ( receiving_message
4444 && (queue_only_load >= 0 || (f.is_inetd && smtp_load_reserve >= 0)))
4445 load_average = OS_GETLOADAVG();
4448 /* The queue_only configuration option can be overridden by -odx on the command
4449 line, except that if queue_only_override is false, queue_only cannot be unset
4450 from the command line. */
4452 if (queue_only_set && (queue_only_override || arg_queue_only))
4453 queue_only = arg_queue_only;
4455 /* The receive_timeout and smtp_receive_timeout options can be overridden by
4458 if (arg_receive_timeout >= 0) receive_timeout = arg_receive_timeout;
4459 if (arg_smtp_receive_timeout >= 0)
4460 smtp_receive_timeout = arg_smtp_receive_timeout;
4462 /* If Exim was started with root privilege, unless we have already removed the
4463 root privilege above as a result of -C, -D, -be, -bf or -bF, remove it now
4464 except when starting the daemon or doing some kind of delivery or address
4465 testing (-bt). These are the only cases when root need to be retained. We run
4466 as exim for -bv and -bh. However, if deliver_drop_privilege is set, root is
4467 retained only for starting the daemon. We always do the initgroups() in this
4468 situation (controlled by the TRUE below), in order to be as close as possible
4469 to the state Exim usually runs in. */
4471 if ( !unprivileged /* originally had root AND */
4472 && !removed_privilege /* still got root AND */
4473 && !f.daemon_listen /* not starting the daemon */
4474 && queue_interval <= 0 /* (either kind of daemon) */
4475 && ( /* AND EITHER */
4476 deliver_drop_privilege /* requested unprivileged */
4478 queue_interval < 0 /* not running the queue */
4479 && ( msg_action_arg < 0 /* and */
4480 || msg_action != MSG_DELIVER /* not delivering */
4482 && (!checking || !f.address_test_mode) /* not address checking */
4483 && !rcpt_verify_quota /* and not quota checking */
4485 exim_setugid(exim_uid, exim_gid, TRUE, US"privilege not needed");
4487 /* When we are retaining a privileged uid, we still change to the exim gid. */
4492 DEBUG(D_any) debug_printf("dropping to exim gid; retaining priv uid\n");
4493 rv = setgid(exim_gid);
4494 /* Impact of failure is that some stuff might end up with an incorrect group.
4495 We track this for failures from root, since any attempt to change privilege
4496 by root should succeed and failures should be examined. For non-root,
4497 there's no security risk. For me, it's { exim -bV } on a just-built binary,
4498 no need to complain then. */
4500 if (!(unprivileged || removed_privilege))
4501 exim_fail("exim: changing group failed: %s\n", strerror(errno));
4504 DEBUG(D_any) debug_printf("changing group to %ld failed: %s\n",
4505 (long int)exim_gid, strerror(errno));
4509 /* Handle a request to scan a file for malware */
4510 if (malware_test_file)
4512 #ifdef WITH_CONTENT_SCAN
4514 set_process_info("scanning file for malware");
4515 if ((result = malware_in_file(malware_test_file)) == FAIL)
4517 printf("No malware found.\n");
4522 printf("Malware lookup returned non-okay/fail: %d\n", result);
4526 printf("Malware found: %s\n", malware_name);
4528 printf("Malware scan detected malware of unknown name.\n");
4530 printf("Malware scanning not enabled at compile time.\n");
4535 /* Handle a request to list the delivery queue */
4539 set_process_info("listing the queue");
4540 queue_list(list_queue_option, argv + recipients_arg, argc - recipients_arg);
4544 /* Handle a request to count the delivery queue */
4548 set_process_info("counting the queue");
4549 fprintf(stdout, "%u\n", queue_count());
4553 /* Handle actions on specific messages, except for the force delivery and
4554 message load actions, which are done below. Some actions take a whole list of
4555 message ids, which are known to continue up to the end of the arguments. Others
4556 take a single message id and then operate on the recipients list. */
4558 if (msg_action_arg > 0 && msg_action != MSG_DELIVER && msg_action != MSG_LOAD)
4560 int yield = EXIT_SUCCESS;
4561 set_process_info("acting on specified messages");
4563 /* ACL definitions may be needed when removing a message (-Mrm) because
4564 event_action gets expanded */
4566 if (msg_action == MSG_REMOVE)
4568 int old_pool = store_pool;
4569 store_pool = POOL_CONFIG;
4571 store_pool = old_pool;
4572 store_writeprotect(POOL_CONFIG);
4575 if (!one_msg_action)
4577 for (i = msg_action_arg; i < argc; i++)
4578 if (!queue_action(argv[i], msg_action, NULL, 0, 0))
4579 yield = EXIT_FAILURE;
4582 case MSG_REMOVE: case MSG_FREEZE: case MSG_THAW: break;
4583 default: printf("\n"); break;
4587 else if (!queue_action(argv[msg_action_arg], msg_action, argv, argc,
4588 recipients_arg)) yield = EXIT_FAILURE;
4592 /* We used to set up here to skip reading the ACL section, on
4593 (msg_action_arg > 0 || (queue_interval == 0 && !f.daemon_listen)
4594 Now, since the intro of the ${acl } expansion, ACL definitions may be
4595 needed in transports so we lost the optimisation. */
4598 int old_pool = store_pool;
4599 #ifdef MEASURE_TIMING
4600 struct timeval t0, diff;
4601 (void)gettimeofday(&t0, NULL);
4604 store_pool = POOL_CONFIG;
4606 store_pool = old_pool;
4607 store_writeprotect(POOL_CONFIG);
4609 #ifdef MEASURE_TIMING
4610 report_time_since(&t0, US"readconf_rest (delta)");
4614 /* Handle a request to check quota */
4615 if (rcpt_verify_quota)
4616 if (real_uid != root_uid && real_uid != exim_uid)
4617 exim_fail("exim: Permission denied\n");
4618 else if (recipients_arg >= argc)
4619 exim_fail("exim: missing recipient for quota check\n");
4622 verify_quota(argv[recipients_arg]);
4623 exim_exit(EXIT_SUCCESS);
4626 /* Handle the -brt option. This is for checking out retry configurations.
4627 The next three arguments are a domain name or a complete address, and
4628 optionally two error numbers. All it does is to call the function that
4629 scans the retry configuration data. */
4631 if (test_retry_arg >= 0)
4633 retry_config *yield;
4634 int basic_errno = 0;
4636 const uschar *s1, *s2;
4638 if (test_retry_arg >= argc)
4640 printf("-brt needs a domain or address argument\n");
4641 exim_exit(EXIT_FAILURE);
4643 s1 = exim_str_fail_toolong(argv[test_retry_arg++], EXIM_EMAILADDR_MAX, "-brt");
4646 /* If the first argument contains no @ and no . it might be a local user
4647 or it might be a single-component name. Treat as a domain. */
4649 if (Ustrchr(s1, '@') == NULL && Ustrchr(s1, '.') == NULL)
4651 printf("Warning: \"%s\" contains no '@' and no '.' characters. It is "
4652 "being \ntreated as a one-component domain, not as a local part.\n\n",
4656 /* There may be an optional second domain arg. */
4658 if (test_retry_arg < argc && Ustrchr(argv[test_retry_arg], '.') != NULL)
4659 s2 = exim_str_fail_toolong(argv[test_retry_arg++], EXIM_DOMAINNAME_MAX, "-brt 2nd");
4661 /* The final arg is an error name */
4663 if (test_retry_arg < argc)
4665 const uschar *ss = exim_str_fail_toolong(argv[test_retry_arg], EXIM_DRIVERNAME_MAX, "-brt 3rd");
4667 readconf_retry_error(ss, ss + Ustrlen(ss), &basic_errno, &more_errno);
4670 printf("%s\n", CS error);
4671 return EXIT_FAILURE;
4674 /* For the {MAIL,RCPT,DATA}_4xx errors, a value of 255 means "any", and a
4675 code > 100 as an error is for matching codes to the decade. Turn them into
4676 a real error code, off the decade. */
4678 if (basic_errno == ERRNO_MAIL4XX ||
4679 basic_errno == ERRNO_RCPT4XX ||
4680 basic_errno == ERRNO_DATA4XX)
4682 int code = (more_errno >> 8) & 255;
4684 more_errno = (more_errno & 0xffff00ff) | (21 << 8);
4685 else if (code > 100)
4686 more_errno = (more_errno & 0xffff00ff) | ((code - 96) << 8);
4690 if (!(yield = retry_find_config(s1, s2, basic_errno, more_errno)))
4691 printf("No retry information found\n");
4694 more_errno = yield->more_errno;
4695 printf("Retry rule: %s ", yield->pattern);
4697 if (yield->basic_errno == ERRNO_EXIMQUOTA)
4699 printf("quota%s%s ",
4700 (more_errno > 0)? "_" : "",
4701 (more_errno > 0)? readconf_printtime(more_errno) : US"");
4703 else if (yield->basic_errno == ECONNREFUSED)
4705 printf("refused%s%s ",
4706 (more_errno > 0)? "_" : "",
4707 (more_errno == 'M')? "MX" :
4708 (more_errno == 'A')? "A" : "");
4710 else if (yield->basic_errno == ETIMEDOUT)
4713 if ((more_errno & RTEF_CTOUT) != 0) printf("_connect");
4715 if (more_errno != 0) printf("_%s",
4716 (more_errno == 'M')? "MX" : "A");
4719 else if (yield->basic_errno == ERRNO_AUTHFAIL)
4720 printf("auth_failed ");
4723 for (retry_rule * r = yield->rules; r; r = r->next)
4725 printf("%c,%s", r->rule, readconf_printtime(r->timeout)); /* Do not */
4726 printf(",%s", readconf_printtime(r->p1)); /* amalgamate */
4732 printf(",%d.", x/1000);
4746 exim_exit(EXIT_SUCCESS);
4749 /* Handle a request to list one or more configuration options */
4750 /* If -n was set, we suppress some information */
4755 set_process_info("listing variables");
4756 if (recipients_arg >= argc)
4757 fail = !readconf_print(US"all", NULL, flag_n);
4758 else for (i = recipients_arg; i < argc; i++)
4761 (Ustrcmp(argv[i], "router") == 0 ||
4762 Ustrcmp(argv[i], "transport") == 0 ||
4763 Ustrcmp(argv[i], "authenticator") == 0 ||
4764 Ustrcmp(argv[i], "macro") == 0 ||
4765 Ustrcmp(argv[i], "environment") == 0))
4767 fail |= !readconf_print(exim_str_fail_toolong(argv[i+1], EXIM_DRIVERNAME_MAX, "-bP name"), argv[i], flag_n);
4771 fail = !readconf_print(exim_str_fail_toolong(argv[i], EXIM_DRIVERNAME_MAX, "-bP item"), NULL, flag_n);
4773 exim_exit(fail ? EXIT_FAILURE : EXIT_SUCCESS);
4778 set_process_info("listing config");
4779 exim_exit(readconf_print(US"config", NULL, flag_n)
4780 ? EXIT_SUCCESS : EXIT_FAILURE);
4784 /* Initialise subsystems as required. */
4788 /* Handle a request to deliver one or more messages that are already on the
4789 queue. Values of msg_action other than MSG_DELIVER and MSG_LOAD are dealt with
4790 above. MSG_LOAD is handled with -be (which is the only time it applies) below.
4792 Delivery of specific messages is typically used for a small number when
4793 prodding by hand (when the option forced_delivery will be set) or when
4794 re-execing to regain root privilege. Each message delivery must happen in a
4795 separate process, so we fork a process for each one, and run them sequentially
4796 so that debugging output doesn't get intertwined, and to avoid spawning too
4797 many processes if a long list is given. However, don't fork for the last one;
4798 this saves a process in the common case when Exim is called to deliver just one
4801 if (msg_action_arg > 0 && msg_action != MSG_LOAD)
4803 if (prod_requires_admin && !f.admin_user)
4805 fprintf(stderr, "exim: Permission denied\n");
4806 exim_exit(EXIT_FAILURE);
4808 set_process_info("delivering specified messages");
4809 if (deliver_give_up) forced_delivery = f.deliver_force_thaw = TRUE;
4810 for (i = msg_action_arg; i < argc; i++)
4814 /*XXX This use of argv[i] for msg_id should really be tainted, but doing
4815 that runs into a later copy into the untainted global message_id[] */
4816 /*XXX Do we need a length limit check here? */
4818 (void)deliver_message(argv[i], forced_delivery, deliver_give_up);
4819 else if ((pid = exim_fork(US"cmdline-delivery")) == 0)
4821 (void)deliver_message(argv[i], forced_delivery, deliver_give_up);
4822 exim_underbar_exit(EXIT_SUCCESS);
4826 fprintf(stderr, "failed to fork delivery process for %s: %s\n", argv[i],
4828 exim_exit(EXIT_FAILURE);
4832 exim_exit(EXIT_SUCCESS);
4836 /* If only a single queue run is requested, without SMTP listening, we can just
4837 turn into a queue runner, with an optional starting message id. */
4839 if (queue_interval == 0 && !f.daemon_listen)
4841 DEBUG(D_queue_run) debug_printf("Single queue run%s%s%s%s\n",
4842 start_queue_run_id ? US" starting at " : US"",
4843 start_queue_run_id ? start_queue_run_id: US"",
4844 stop_queue_run_id ? US" stopping at " : US"",
4845 stop_queue_run_id ? stop_queue_run_id : US"");
4847 set_process_info("running the '%s' queue (single queue run)", queue_name);
4849 set_process_info("running the queue (single queue run)");
4850 queue_run(start_queue_run_id, stop_queue_run_id, FALSE);
4851 exim_exit(EXIT_SUCCESS);
4855 /* Find the login name of the real user running this process. This is always
4856 needed when receiving a message, because it is written into the spool file. It
4857 may also be used to construct a from: or a sender: header, and in this case we
4858 need the user's full name as well, so save a copy of it, checked for RFC822
4859 syntax and munged if necessary, if it hasn't previously been set by the -F
4860 argument. We may try to get the passwd entry more than once, in case NIS or
4861 other delays are in evidence. Save the home directory for use in filter testing
4866 if ((pw = getpwuid(real_uid)) != NULL)
4868 originator_login = string_copy(US pw->pw_name);
4869 originator_home = string_copy(US pw->pw_dir);
4871 /* If user name has not been set by -F, set it from the passwd entry
4872 unless -f has been used to set the sender address by a trusted user. */
4874 if (!originator_name)
4876 if (!sender_address || (!f.trusted_caller && filter_test == FTEST_NONE))
4878 uschar *name = US pw->pw_gecos;
4879 uschar *amp = Ustrchr(name, '&');
4882 /* Most Unix specify that a '&' character in the gecos field is
4883 replaced by a copy of the login name, and some even specify that
4884 the first character should be upper cased, so that's what we do. */
4889 string_format(buffer, sizeof(buffer), "%.*s%n%s%s",
4890 (int)(amp - name), name, &loffset, originator_login, amp + 1);
4891 buffer[loffset] = toupper(buffer[loffset]);
4895 /* If a pattern for matching the gecos field was supplied, apply
4896 it and then expand the name string. */
4898 if (gecos_pattern && gecos_name)
4900 const pcre2_code *re;
4901 re = regex_must_compile(gecos_pattern, FALSE, TRUE); /* Use malloc */
4903 if (regex_match_and_setup(re, name, 0, -1))
4905 uschar *new_name = expand_string(gecos_name);
4909 DEBUG(D_receive) debug_printf("user name \"%s\" extracted from "
4910 "gecos field \"%s\"\n", new_name, name);
4913 else DEBUG(D_receive) debug_printf("failed to expand gecos_name string "
4914 "\"%s\": %s\n", gecos_name, expand_string_message);
4916 else DEBUG(D_receive) debug_printf("gecos_pattern \"%s\" did not match "
4917 "gecos field \"%s\"\n", gecos_pattern, name);
4918 store_free((void *)re);
4920 originator_name = string_copy(name);
4923 /* A trusted caller has used -f but not -F */
4925 else originator_name = US"";
4928 /* Break the retry loop */
4933 if (++i > finduser_retries) break;
4937 /* If we cannot get a user login, log the incident and give up, unless the
4938 configuration specifies something to use. When running in the test harness,
4939 any setting of unknown_login overrides the actual name. */
4941 if (!originator_login || f.running_in_test_harness)
4945 originator_login = expand_string(unknown_login);
4946 if (!originator_name && unknown_username)
4947 originator_name = expand_string(unknown_username);
4948 if (!originator_name) originator_name = US"";
4950 if (!originator_login)
4951 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Failed to get user name for uid %d",
4955 /* Ensure that the user name is in a suitable form for use as a "phrase" in an
4958 originator_name = US parse_fix_phrase(originator_name, Ustrlen(originator_name));
4960 /* If a message is created by this call of Exim, the uid/gid of its originator
4961 are those of the caller. These values are overridden if an existing message is
4962 read in from the spool. */
4964 originator_uid = real_uid;
4965 originator_gid = real_gid;
4967 DEBUG(D_receive) debug_printf("originator: uid=%d gid=%d login=%s name=%s\n",
4968 (int)originator_uid, (int)originator_gid, originator_login, originator_name);
4970 /* Run in daemon and/or queue-running mode. The function daemon_go() never
4971 returns. We leave this till here so that the originator_ fields are available
4972 for incoming messages via the daemon. The daemon cannot be run in mua_wrapper
4975 if (f.daemon_listen || f.inetd_wait_mode || queue_interval > 0)
4979 fprintf(stderr, "Daemon cannot be run when mua_wrapper is set\n");
4980 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Daemon cannot be run when "
4981 "mua_wrapper is set");
4984 # ifndef DISABLE_TLS
4985 /* This also checks that the library linkage is working and we can call
4986 routines in it, so call even if tls_require_ciphers is unset */
4988 # ifdef MEASURE_TIMING
4989 struct timeval t0, diff;
4990 (void)gettimeofday(&t0, NULL);
4992 if (!tls_dropprivs_validate_require_cipher(FALSE))
4994 # ifdef MEASURE_TIMING
4995 report_time_since(&t0, US"validate_ciphers (delta)");
5003 /* If the sender ident has not been set (by a trusted caller) set it to
5004 the caller. This will get overwritten below for an inetd call. If a trusted
5005 caller has set it empty, unset it. */
5007 if (!sender_ident) sender_ident = originator_login;
5008 else if (!*sender_ident) sender_ident = NULL;
5010 /* Handle the -brw option, which is for checking out rewriting rules. Cause log
5011 writes (on errors) to go to stderr instead. Can't do this earlier, as want the
5012 originator_* variables set. */
5014 if (test_rewrite_arg >= 0)
5016 f.really_exim = FALSE;
5017 if (test_rewrite_arg >= argc)
5019 printf("-brw needs an address argument\n");
5020 exim_exit(EXIT_FAILURE);
5022 rewrite_test(exim_str_fail_toolong(argv[test_rewrite_arg], EXIM_EMAILADDR_MAX, "-brw"));
5023 exim_exit(EXIT_SUCCESS);
5026 /* A locally-supplied message is considered to be coming from a local user
5027 unless a trusted caller supplies a sender address with -f, or is passing in the
5028 message via SMTP (inetd invocation or otherwise). */
5030 if ( !sender_address && !smtp_input
5031 || !f.trusted_caller && filter_test == FTEST_NONE)
5033 f.sender_local = TRUE;
5035 /* A trusted caller can supply authenticated_sender and authenticated_id
5036 via -oMas and -oMai and if so, they will already be set. Otherwise, force
5037 defaults except when host checking. */
5039 if (!authenticated_sender && !host_checking)
5040 authenticated_sender = string_sprintf("%s@%s", originator_login,
5041 qualify_domain_sender);
5042 if (!authenticated_id && !host_checking)
5043 authenticated_id = originator_login;
5046 /* Trusted callers are always permitted to specify the sender address.
5047 Untrusted callers may specify it if it matches untrusted_set_sender, or if what
5048 is specified is the empty address. However, if a trusted caller does not
5049 specify a sender address for SMTP input, we leave sender_address unset. This
5050 causes the MAIL commands to be honoured. */
5052 if ( !smtp_input && !sender_address
5053 || !receive_check_set_sender(sender_address))
5055 /* Either the caller is not permitted to set a general sender, or this is
5056 non-SMTP input and the trusted caller has not set a sender. If there is no
5057 sender, or if a sender other than <> is set, override with the originator's
5058 login (which will get qualified below), except when checking things. */
5060 if ( !sender_address /* No sender_address set */
5062 (sender_address[0] != 0 && /* Non-empty sender address, AND */
5063 !checking)) /* Not running tests, including filter tests */
5065 sender_address = originator_login;
5066 f.sender_address_forced = FALSE;
5067 sender_address_domain = 0;
5071 /* Remember whether an untrusted caller set the sender address */
5073 f.sender_set_untrusted = sender_address != originator_login && !f.trusted_caller;
5075 /* Ensure that the sender address is fully qualified unless it is the empty
5076 address, which indicates an error message, or doesn't exist (root caller, smtp
5077 interface, no -f argument). */
5079 if (sender_address && *sender_address && sender_address_domain == 0)
5080 sender_address = string_sprintf("%s@%s", local_part_quote(sender_address),
5081 qualify_domain_sender);
5083 DEBUG(D_receive) debug_printf("sender address = %s\n", sender_address);
5085 /* Handle a request to verify a list of addresses, or test them for delivery.
5086 This must follow the setting of the sender address, since routers can be
5087 predicated upon the sender. If no arguments are given, read addresses from
5088 stdin. Set debug_level to at least D_v to get full output for address testing.
5091 if (verify_address_mode || f.address_test_mode)
5094 int flags = vopt_qualify;
5096 if (verify_address_mode)
5098 if (!verify_as_sender) flags |= vopt_is_recipient;
5099 DEBUG(D_verify) debug_print_ids(US"Verifying:");
5104 flags |= vopt_is_recipient;
5105 debug_selector |= D_v;
5106 debug_file = stderr;
5107 debug_fd = fileno(debug_file);
5108 DEBUG(D_verify) debug_print_ids(US"Address testing:");
5111 if (recipients_arg < argc)
5112 while (recipients_arg < argc)
5114 /* Supplied addresses are tainted since they come from a user */
5115 uschar * s = string_copy_taint(exim_str_fail_toolong(argv[recipients_arg++], EXIM_DISPLAYMAIL_MAX, "address verification"), TRUE);
5118 BOOL finished = FALSE;
5119 uschar *ss = parse_find_address_end(s, FALSE);
5120 if (*ss == ',') *ss = 0; else finished = TRUE;
5121 test_address(s, flags, &exit_value);
5124 while (*++s == ',' || isspace(*s)) ;
5130 uschar * s = get_stdinput(NULL, NULL);
5132 test_address(string_copy_taint(exim_str_fail_toolong(s, EXIM_DISPLAYMAIL_MAX, "address verification (stdin)"), TRUE), flags, &exit_value);
5136 exim_exit(exit_value);
5139 /* Handle expansion checking. Either expand items on the command line, or read
5140 from stdin if there aren't any. If -Mset was specified, load the message so
5141 that its variables can be used, but restrict this facility to admin users.
5142 Otherwise, if -bem was used, read a message from stdin. */
5146 dns_init(FALSE, FALSE, FALSE);
5147 if (msg_action_arg > 0 && msg_action == MSG_LOAD)
5151 exim_fail("exim: permission denied\n");
5152 message_id = US exim_str_fail_toolong(argv[msg_action_arg], MESSAGE_ID_LENGTH, "message-id");
5153 /* Checking the length of the ID is sufficient to validate it.
5154 Get an untainted version so file opens can be done. */
5155 message_id = string_copy_taint(message_id, FALSE);
5157 spoolname = string_sprintf("%s-H", message_id);
5158 if ((deliver_datafile = spool_open_datafile(message_id)) < 0)
5159 printf ("Failed to load message datafile %s\n", message_id);
5160 if (spool_read_header(spoolname, TRUE, FALSE) != spool_read_OK)
5161 printf ("Failed to load message %s\n", message_id);
5164 /* Read a test message from a file. We fudge it up to be on stdin, saving
5165 stdin itself for later reading of expansion strings. */
5167 else if (expansion_test_message)
5169 int save_stdin = dup(0);
5170 int fd = Uopen(expansion_test_message, O_RDONLY, 0);
5172 exim_fail("exim: failed to open %s: %s\n", expansion_test_message,
5175 filter_test = FTEST_USER; /* Fudge to make it look like filter test */
5176 message_ended = END_NOTENDED;
5177 read_message_body(receive_msg(extract_recipients));
5178 message_linecount += body_linecount;
5179 (void)dup2(save_stdin, 0);
5180 (void)close(save_stdin);
5181 clearerr(stdin); /* Required by Darwin */
5184 /* Only admin users may see config-file macros this way */
5186 if (!f.admin_user) macros_user = macros = mlast = NULL;
5188 /* Allow $recipients for this testing */
5190 f.enable_dollar_recipients = TRUE;
5192 /* Expand command line items */
5194 if (recipients_arg < argc)
5195 while (recipients_arg < argc)
5196 expansion_test_line(exim_str_fail_toolong(argv[recipients_arg++], EXIM_EMAILADDR_MAX, "recipient"));
5202 char *(*fn_readline)(const char *) = NULL;
5203 void (*fn_addhist)(const char *) = NULL;
5207 void *dlhandle = set_readline(&fn_readline, &fn_addhist);
5210 while (s = get_stdinput(fn_readline, fn_addhist))
5211 expansion_test_line(s);
5214 if (dlhandle) dlclose(dlhandle);
5218 /* The data file will be open after -Mset */
5220 if (deliver_datafile >= 0)
5222 (void)close(deliver_datafile);
5223 deliver_datafile = -1;
5226 exim_exit(EXIT_SUCCESS);
5230 /* The active host name is normally the primary host name, but it can be varied
5231 for hosts that want to play several parts at once. We need to ensure that it is
5232 set for host checking, and for receiving messages. */
5234 smtp_active_hostname = primary_hostname;
5235 if (raw_active_hostname != NULL)
5237 uschar *nah = expand_string(raw_active_hostname);
5240 if (!f.expand_string_forcedfail)
5241 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to expand \"%s\" "
5242 "(smtp_active_hostname): %s", raw_active_hostname,
5243 expand_string_message);
5245 else if (nah[0] != 0) smtp_active_hostname = nah;
5248 /* Handle host checking: this facility mocks up an incoming SMTP call from a
5249 given IP address so that the blocking and relay configuration can be tested.
5250 Unless a sender_ident was set by -oMt, we discard it (the default is the
5251 caller's login name). An RFC 1413 call is made only if we are running in the
5252 test harness and an incoming interface and both ports are specified, because
5253 there is no TCP/IP call to find the ident for. */
5260 if (!sender_ident_set)
5262 sender_ident = NULL;
5263 if (f.running_in_test_harness && sender_host_port
5264 && interface_address && interface_port)
5265 verify_get_ident(1223); /* note hardwired port number */
5268 /* In case the given address is a non-canonical IPv6 address, canonicalize
5269 it. The code works for both IPv4 and IPv6, as it happens. */
5271 size = host_aton(sender_host_address, x);
5272 sender_host_address = store_get(48, FALSE); /* large enough for full IPv6 */
5273 (void)host_nmtoa(size, x, -1, sender_host_address, ':');
5275 /* Now set up for testing */
5277 host_build_sender_fullhost();
5281 f.sender_local = FALSE;
5282 f.sender_host_notsocket = TRUE;
5283 debug_file = stderr;
5284 debug_fd = fileno(debug_file);
5285 fprintf(stdout, "\n**** SMTP testing session as if from host %s\n"
5286 "**** but without any ident (RFC 1413) callback.\n"
5287 "**** This is not for real!\n\n",
5288 sender_host_address);
5290 memset(sender_host_cache, 0, sizeof(sender_host_cache));
5291 if (verify_check_host(&hosts_connection_nolog) == OK)
5292 BIT_CLEAR(log_selector, log_selector_size, Li_smtp_connection);
5293 log_write(L_smtp_connection, LOG_MAIN, "%s", smtp_get_connection_info());
5295 /* NOTE: We do *not* call smtp_log_no_mail() if smtp_start_session() fails,
5296 because a log line has already been written for all its failure exists
5297 (usually "connection refused: <reason>") and writing another one is
5298 unnecessary clutter. */
5300 if (smtp_start_session())
5303 for (; (reset_point = store_mark()); store_reset(reset_point))
5305 if (smtp_setup_msg() <= 0) break;
5306 if (!receive_msg(FALSE)) break;
5308 return_path = sender_address = NULL;
5309 dnslist_domain = dnslist_matched = NULL;
5310 #ifndef DISABLE_DKIM
5311 dkim_cur_signer = NULL;
5314 deliver_localpart_orig = NULL;
5315 deliver_domain_orig = NULL;
5316 callout_address = sending_ip_address = NULL;
5317 deliver_localpart_data = deliver_domain_data =
5318 recipient_data = sender_data = NULL;
5319 sender_rate = sender_rate_limit = sender_rate_period = NULL;
5323 exim_exit(EXIT_SUCCESS);
5327 /* Arrange for message reception if recipients or SMTP were specified;
5328 otherwise complain unless a version print (-bV) happened or this is a filter
5329 verification test or info dump.
5330 In the former case, show the configuration file name. */
5332 if (recipients_arg >= argc && !extract_recipients && !smtp_input)
5334 if (version_printed)
5336 if (Ustrchr(config_main_filelist, ':'))
5337 printf("Configuration file search path is %s\n", config_main_filelist);
5338 printf("Configuration file is %s\n", config_main_filename);
5339 return EXIT_SUCCESS;
5342 if (info_flag != CMDINFO_NONE)
5344 show_exim_information(info_flag, info_stdout ? stdout : stderr);
5345 return info_stdout ? EXIT_SUCCESS : EXIT_FAILURE;
5348 if (filter_test == FTEST_NONE)
5349 exim_usage(called_as);
5353 /* If mua_wrapper is set, Exim is being used to turn an MUA that submits on the
5354 standard input into an MUA that submits to a smarthost over TCP/IP. We know
5355 that we are not called from inetd, because that is rejected above. The
5356 following configuration settings are forced here:
5358 (1) Synchronous delivery (-odi)
5359 (2) Errors to stderr (-oep == -oeq)
5360 (3) No parallel remote delivery
5361 (4) Unprivileged delivery
5363 We don't force overall queueing options because there are several of them;
5364 instead, queueing is avoided below when mua_wrapper is set. However, we do need
5365 to override any SMTP queueing. */
5369 f.synchronous_delivery = TRUE;
5370 arg_error_handling = ERRORS_STDERR;
5371 remote_max_parallel = 1;
5372 deliver_drop_privilege = TRUE;
5373 f.queue_smtp = FALSE;
5374 queue_smtp_domains = NULL;
5376 message_utf8_downconvert = -1; /* convert-if-needed */
5381 /* Prepare to accept one or more new messages on the standard input. When a
5382 message has been read, its id is returned in message_id[]. If doing immediate
5383 delivery, we fork a delivery process for each received message, except for the
5384 last one, where we can save a process switch.
5386 It is only in non-smtp mode that error_handling is allowed to be changed from
5387 its default of ERRORS_SENDER by argument. (Idle thought: are any of the
5388 sendmail error modes other than -oem ever actually used? Later: yes.) */
5390 if (!smtp_input) error_handling = arg_error_handling;
5392 /* If this is an inetd call, ensure that stderr is closed to prevent panic
5393 logging being sent down the socket and make an identd call to get the
5396 else if (f.is_inetd)
5398 (void)fclose(stderr);
5399 exim_nullstd(); /* Re-open to /dev/null */
5400 verify_get_ident(IDENT_PORT);
5401 host_build_sender_fullhost();
5402 set_process_info("handling incoming connection from %s via inetd",
5406 /* If the sender host address has been set, build sender_fullhost if it hasn't
5407 already been done (which it will have been for inetd). This caters for the
5408 case when it is forced by -oMa. However, we must flag that it isn't a socket,
5409 so that the test for IP options is skipped for -bs input. */
5411 if (sender_host_address && !sender_fullhost)
5413 host_build_sender_fullhost();
5414 set_process_info("handling incoming connection from %s via -oMa",
5416 f.sender_host_notsocket = TRUE;
5419 /* Otherwise, set the sender host as unknown except for inetd calls. This
5420 prevents host checking in the case of -bs not from inetd and also for -bS. */
5422 else if (!f.is_inetd) f.sender_host_unknown = TRUE;
5424 /* If stdout does not exist, then dup stdin to stdout. This can happen
5425 if exim is started from inetd. In this case fd 0 will be set to the socket,
5426 but fd 1 will not be set. This also happens for passed SMTP channels. */
5428 if (fstat(1, &statbuf) < 0) (void)dup2(0, 1);
5430 /* Set up the incoming protocol name and the state of the program. Root is
5431 allowed to force received protocol via the -oMr option above. If we have come
5432 via inetd, the process info has already been set up. We don't set
5433 received_protocol here for smtp input, as it varies according to
5434 batch/HELO/EHLO/AUTH/TLS. */
5438 if (!f.is_inetd) set_process_info("accepting a local %sSMTP message from <%s>",
5439 smtp_batched_input? "batched " : "",
5440 (sender_address!= NULL)? sender_address : originator_login);
5444 int old_pool = store_pool;
5445 store_pool = POOL_PERM;
5446 if (!received_protocol)
5447 received_protocol = string_sprintf("local%s", called_as);
5448 store_pool = old_pool;
5449 set_process_info("accepting a local non-SMTP message from <%s>",
5453 /* Initialize the session_local_queue-only flag (this will be ignored if
5454 mua_wrapper is set) */
5457 session_local_queue_only = queue_only;
5459 /* For non-SMTP and for batched SMTP input, check that there is enough space on
5460 the spool if so configured. On failure, we must not attempt to send an error
5461 message! (For interactive SMTP, the check happens at MAIL FROM and an SMTP
5462 error code is given.) */
5464 if ((!smtp_input || smtp_batched_input) && !receive_check_fs(0))
5465 exim_fail("exim: insufficient disk space\n");
5467 /* If this is smtp input of any kind, real or batched, handle the start of the
5470 NOTE: We do *not* call smtp_log_no_mail() if smtp_start_session() fails,
5471 because a log line has already been written for all its failure exists
5472 (usually "connection refused: <reason>") and writing another one is
5473 unnecessary clutter. */
5479 memset(sender_host_cache, 0, sizeof(sender_host_cache));
5480 if (verify_check_host(&hosts_connection_nolog) == OK)
5481 BIT_CLEAR(log_selector, log_selector_size, Li_smtp_connection);
5482 log_write(L_smtp_connection, LOG_MAIN, "%s", smtp_get_connection_info());
5483 if (!smtp_start_session())
5486 exim_exit(EXIT_SUCCESS);
5490 /* Otherwise, set up the input size limit here. */
5494 thismessage_size_limit = expand_string_integer(message_size_limit, TRUE);
5495 if (expand_string_message)
5496 if (thismessage_size_limit == -1)
5497 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to expand "
5498 "message_size_limit: %s", expand_string_message);
5500 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "invalid value for "
5501 "message_size_limit: %s", expand_string_message);
5504 /* Loop for several messages when reading SMTP input. If we fork any child
5505 processes, we don't want to wait for them unless synchronous delivery is
5506 requested, so set SIGCHLD to SIG_IGN in that case. This is not necessarily the
5507 same as SIG_DFL, despite the fact that documentation often lists the default as
5508 "ignore". This is a confusing area. This is what I know:
5510 At least on some systems (e.g. Solaris), just setting SIG_IGN causes child
5511 processes that complete simply to go away without ever becoming defunct. You
5512 can't then wait for them - but we don't want to wait for them in the
5513 non-synchronous delivery case. However, this behaviour of SIG_IGN doesn't
5514 happen for all OS (e.g. *BSD is different).
5516 But that's not the end of the story. Some (many? all?) systems have the
5517 SA_NOCLDWAIT option for sigaction(). This requests the behaviour that Solaris
5518 has by default, so it seems that the difference is merely one of default
5519 (compare restarting vs non-restarting signals).
5521 To cover all cases, Exim sets SIG_IGN with SA_NOCLDWAIT here if it can. If not,
5522 it just sets SIG_IGN. To be on the safe side it also calls waitpid() at the end
5523 of the loop below. Paranoia rules.
5525 February 2003: That's *still* not the end of the story. There are now versions
5526 of Linux (where SIG_IGN does work) that are picky. If, having set SIG_IGN, a
5527 process then calls waitpid(), a grumble is written to the system log, because
5528 this is logically inconsistent. In other words, it doesn't like the paranoia.
5529 As a consequence of this, the waitpid() below is now excluded if we are sure
5530 that SIG_IGN works. */
5532 if (!f.synchronous_delivery)
5535 struct sigaction act;
5536 act.sa_handler = SIG_IGN;
5537 sigemptyset(&(act.sa_mask));
5538 act.sa_flags = SA_NOCLDWAIT;
5539 sigaction(SIGCHLD, &act, NULL);
5541 signal(SIGCHLD, SIG_IGN);
5545 /* Save the current store pool point, for resetting at the start of
5546 each message, and save the real sender address, if any. */
5548 real_sender_address = sender_address;
5550 /* Loop to receive messages; receive_msg() returns TRUE if there are more
5551 messages to be read (SMTP input), or FALSE otherwise (not SMTP, or SMTP channel
5554 for (BOOL more = TRUE; more; )
5556 rmark reset_point = store_mark();
5559 /* Handle the SMTP case; call smtp_setup_mst() to deal with the initial SMTP
5560 input and build the recipients list, before calling receive_msg() to read the
5561 message proper. Whatever sender address is given in the SMTP transaction is
5562 often ignored for local senders - we use the actual sender, which is normally
5563 either the underlying user running this process or a -f argument provided by
5564 a trusted caller. It is saved in real_sender_address. The test for whether to
5565 accept the SMTP sender is encapsulated in receive_check_set_sender(). */
5570 if ((rc = smtp_setup_msg()) > 0)
5572 if (real_sender_address != NULL &&
5573 !receive_check_set_sender(sender_address))
5575 sender_address = raw_sender = real_sender_address;
5576 sender_address_unrewritten = NULL;
5579 /* For batched SMTP, we have to run the acl_not_smtp_start ACL, since it
5580 isn't really SMTP, so no other ACL will run until the acl_not_smtp one at
5581 the very end. The result of the ACL is ignored (as for other non-SMTP
5582 messages). It is run for its potential side effects. */
5584 if (smtp_batched_input && acl_not_smtp_start != NULL)
5586 uschar *user_msg, *log_msg;
5587 f.enable_dollar_recipients = TRUE;
5588 (void)acl_check(ACL_WHERE_NOTSMTP_START, NULL, acl_not_smtp_start,
5589 &user_msg, &log_msg);
5590 f.enable_dollar_recipients = FALSE;
5593 /* Now get the data for the message */
5595 more = receive_msg(extract_recipients);
5598 cancel_cutthrough_connection(TRUE, US"receive dropped");
5599 if (more) goto MORELOOP;
5600 smtp_log_no_mail(); /* Log no mail if configured */
5601 exim_exit(EXIT_FAILURE);
5606 cancel_cutthrough_connection(TRUE, US"message setup dropped");
5607 smtp_log_no_mail(); /* Log no mail if configured */
5608 exim_exit(rc ? EXIT_FAILURE : EXIT_SUCCESS);
5612 /* In the non-SMTP case, we have all the information from the command
5613 line, but must process it in case it is in the more general RFC822
5614 format, and in any case, to detect syntax errors. Also, it appears that
5615 the use of comma-separated lists as single arguments is common, so we
5616 had better support them. */
5621 int count = argc - recipients_arg;
5622 uschar **list = argv + recipients_arg;
5624 /* These options cannot be changed dynamically for non-SMTP messages */
5626 f.active_local_sender_retain = local_sender_retain;
5627 f.active_local_from_check = local_from_check;
5629 /* Save before any rewriting */
5631 raw_sender = string_copy(sender_address);
5633 /* Loop for each argument (supplied by user hence tainted) */
5635 for (int i = 0; i < count; i++)
5637 int start, end, domain;
5639 /* There can be multiple addresses, so EXIM_DISPLAYMAIL_MAX (tuned for 1) is too short.
5640 * We'll still want to cap it to something, just in case. */
5641 uschar * s = string_copy_taint(exim_str_fail_toolong(list[i], BIG_BUFFER_SIZE, "address argument"), TRUE);
5643 /* Loop for each comma-separated address */
5647 BOOL finished = FALSE;
5649 uschar *ss = parse_find_address_end(s, FALSE);
5651 if (*ss == ',') *ss = 0; else finished = TRUE;
5653 /* Check max recipients - if -t was used, these aren't recipients */
5655 if (recipients_max > 0 && ++rcount > recipients_max &&
5656 !extract_recipients)
5657 if (error_handling == ERRORS_STDERR)
5659 fprintf(stderr, "exim: too many recipients\n");
5660 exim_exit(EXIT_FAILURE);
5664 moan_to_sender(ERRMESS_TOOMANYRECIP, NULL, NULL, stdin, TRUE)?
5665 errors_sender_rc : EXIT_FAILURE;
5669 BOOL b = allow_utf8_domains;
5670 allow_utf8_domains = TRUE;
5673 parse_extract_address(s, &errmess, &start, &end, &domain, FALSE);
5677 if (string_is_utf8(recipient)) message_smtputf8 = TRUE;
5678 else allow_utf8_domains = b;
5683 if (domain == 0 && !f.allow_unqualified_recipient)
5686 errmess = US"unqualified recipient address not allowed";
5690 if (error_handling == ERRORS_STDERR)
5692 fprintf(stderr, "exim: bad recipient address \"%s\": %s\n",
5693 string_printing(list[i]), errmess);
5694 exim_exit(EXIT_FAILURE);
5700 eblock.text1 = string_printing(list[i]);
5701 eblock.text2 = errmess;
5703 moan_to_sender(ERRMESS_BADARGADDRESS, &eblock, NULL, stdin, TRUE)?
5704 errors_sender_rc : EXIT_FAILURE;
5707 receive_add_recipient(string_copy_taint(recipient, TRUE), -1);
5710 while (*(++s) != 0 && (*s == ',' || isspace(*s)));
5714 /* Show the recipients when debugging */
5718 if (sender_address) debug_printf("Sender: %s\n", sender_address);
5719 if (recipients_list)
5721 debug_printf("Recipients:\n");
5722 for (int i = 0; i < recipients_count; i++)
5723 debug_printf(" %s\n", recipients_list[i].address);
5727 /* Run the acl_not_smtp_start ACL if required. The result of the ACL is
5728 ignored; rejecting here would just add complication, and it can just as
5729 well be done later. Allow $recipients to be visible in the ACL. */
5731 if (acl_not_smtp_start)
5733 uschar *user_msg, *log_msg;
5734 f.enable_dollar_recipients = TRUE;
5735 (void)acl_check(ACL_WHERE_NOTSMTP_START, NULL, acl_not_smtp_start,
5736 &user_msg, &log_msg);
5737 f.enable_dollar_recipients = FALSE;
5740 /* Pause for a while waiting for input. If none received in that time,
5741 close the logfile, if we had one open; then if we wait for a long-running
5742 datasource (months, in one use-case) log rotation will not leave us holding
5745 if (!receive_timeout)
5747 struct timeval t = { .tv_sec = 30*60, .tv_usec = 0 }; /* 30 minutes */
5750 FD_ZERO(&r); FD_SET(0, &r);
5751 if (select(1, &r, NULL, NULL, &t) == 0) mainlog_close();
5754 /* Read the data for the message. If filter_test is not FTEST_NONE, this
5755 will just read the headers for the message, and not write anything onto the
5758 message_ended = END_NOTENDED;
5759 more = receive_msg(extract_recipients);
5761 /* more is always FALSE here (not SMTP message) when reading a message
5762 for real; when reading the headers of a message for filter testing,
5763 it is TRUE if the headers were terminated by '.' and FALSE otherwise. */
5765 if (!message_id[0]) exim_exit(EXIT_FAILURE);
5766 } /* Non-SMTP message reception */
5768 /* If this is a filter testing run, there are headers in store, but
5769 no message on the spool. Run the filtering code in testing mode, setting
5770 the domain to the qualify domain and the local part to the current user,
5771 unless they have been set by options. The prefix and suffix are left unset
5772 unless specified. The the return path is set to to the sender unless it has
5773 already been set from a return-path header in the message. */
5775 if (filter_test != FTEST_NONE)
5777 deliver_domain = ftest_domain ? ftest_domain : qualify_domain_recipient;
5778 deliver_domain_orig = deliver_domain;
5779 deliver_localpart = ftest_localpart ? US ftest_localpart : originator_login;
5780 deliver_localpart_orig = deliver_localpart;
5781 deliver_localpart_prefix = US ftest_prefix;
5782 deliver_localpart_suffix = US ftest_suffix;
5783 deliver_home = originator_home;
5787 printf("Return-path copied from sender\n");
5788 return_path = string_copy(sender_address);
5791 printf("Return-path = %s\n", (return_path[0] == 0)? US"<>" : return_path);
5792 printf("Sender = %s\n", (sender_address[0] == 0)? US"<>" : sender_address);
5794 receive_add_recipient(
5795 string_sprintf("%s%s%s@%s",
5796 ftest_prefix ? ftest_prefix : US"",
5798 ftest_suffix ? ftest_suffix : US"",
5799 deliver_domain), -1);
5801 printf("Recipient = %s\n", recipients_list[0].address);
5802 if (ftest_prefix) printf("Prefix = %s\n", ftest_prefix);
5803 if (ftest_suffix) printf("Suffix = %s\n", ftest_suffix);
5805 if (chdir("/")) /* Get away from wherever the user is running this from */
5807 DEBUG(D_receive) debug_printf("chdir(\"/\") failed\n");
5808 exim_exit(EXIT_FAILURE);
5811 /* Now we run either a system filter test, or a user filter test, or both.
5812 In the latter case, headers added by the system filter will persist and be
5813 available to the user filter. We need to copy the filter variables
5816 if (filter_test & FTEST_SYSTEM)
5817 if (!filter_runtest(filter_sfd, filter_test_sfile, TRUE, more))
5818 exim_exit(EXIT_FAILURE);
5820 memcpy(filter_sn, filter_n, sizeof(filter_sn));
5822 if (filter_test & FTEST_USER)
5823 if (!filter_runtest(filter_ufd, filter_test_ufile, FALSE, more))
5824 exim_exit(EXIT_FAILURE);
5826 exim_exit(EXIT_SUCCESS);
5829 /* Else act on the result of message reception. We should not get here unless
5830 message_id[0] is non-zero. If queue_only is set, session_local_queue_only
5831 will be TRUE. If it is not, check on the number of messages received in this
5834 if ( !session_local_queue_only
5835 && smtp_accept_queue_per_connection > 0
5836 && receive_messagecount > smtp_accept_queue_per_connection)
5838 session_local_queue_only = TRUE;
5839 queue_only_reason = 2;
5842 /* Initialize local_queue_only from session_local_queue_only. If it is false,
5843 and queue_only_load is set, check that the load average is below it. If it is
5844 not, set local_queue_only TRUE. If queue_only_load_latch is true (the
5845 default), we put the whole session into queue_only mode. It then remains this
5846 way for any subsequent messages on the same SMTP connection. This is a
5847 deliberate choice; even though the load average may fall, it doesn't seem
5848 right to deliver later messages on the same call when not delivering earlier
5849 ones. However, there are odd cases where this is not wanted, so this can be
5850 changed by setting queue_only_load_latch false. */
5852 if (!(local_queue_only = session_local_queue_only) && queue_only_load >= 0)
5853 if ((local_queue_only = (load_average = OS_GETLOADAVG()) > queue_only_load))
5855 queue_only_reason = 3;
5856 if (queue_only_load_latch) session_local_queue_only = TRUE;
5859 /* If running as an MUA wrapper, all queueing options and freezing options
5863 local_queue_only = f.queue_only_policy = f.deliver_freeze = FALSE;
5865 /* Log the queueing here, when it will get a message id attached, but
5866 not if queue_only is set (case 0). Case 1 doesn't happen here (too many
5869 if (local_queue_only)
5871 cancel_cutthrough_connection(TRUE, US"no delivery; queueing");
5872 switch(queue_only_reason)
5875 log_write(L_delay_delivery,
5876 LOG_MAIN, "no immediate delivery: more than %d messages "
5877 "received in one connection", smtp_accept_queue_per_connection);
5881 log_write(L_delay_delivery,
5882 LOG_MAIN, "no immediate delivery: load average %.2f",
5883 (double)load_average/1000.0);
5888 else if (f.queue_only_policy || f.deliver_freeze)
5889 cancel_cutthrough_connection(TRUE, US"no delivery; queueing");
5891 /* Else do the delivery unless the ACL or local_scan() called for queue only
5892 or froze the message. Always deliver in a separate process. A fork failure is
5893 not a disaster, as the delivery will eventually happen on a subsequent queue
5894 run. The search cache must be tidied before the fork, as the parent will
5895 do it before exiting. The child will trigger a lookup failure and
5896 thereby defer the delivery if it tries to use (for example) a cached ldap
5897 connection that the parent has called unbind on. */
5904 if ((pid = exim_fork(US"local-accept-delivery")) == 0)
5907 close_unwanted(); /* Close unwanted file descriptors and TLS */
5908 exim_nullstd(); /* Ensure std{in,out,err} exist */
5910 /* Re-exec Exim if we need to regain privilege (note: in mua_wrapper
5911 mode, deliver_drop_privilege is forced TRUE). */
5913 if (geteuid() != root_uid && !deliver_drop_privilege && !unprivileged)
5915 delivery_re_exec(CEE_EXEC_EXIT);
5916 /* Control does not return here. */
5919 /* No need to re-exec */
5921 rc = deliver_message(message_id, FALSE, FALSE);
5923 exim_underbar_exit(!mua_wrapper || rc == DELIVER_MUA_SUCCEEDED
5924 ? EXIT_SUCCESS : EXIT_FAILURE);
5929 cancel_cutthrough_connection(TRUE, US"delivery fork failed");
5930 log_write(0, LOG_MAIN|LOG_PANIC, "failed to fork automatic delivery "
5931 "process: %s", strerror(errno));
5935 release_cutthrough_connection(US"msg passed for delivery");
5937 /* In the parent, wait if synchronous delivery is required. This will
5938 always be the case in MUA wrapper mode. */
5940 if (f.synchronous_delivery)
5943 while (wait(&status) != pid);
5944 if ((status & 0x00ff) != 0)
5945 log_write(0, LOG_MAIN|LOG_PANIC,
5946 "process %d crashed with signal %d while delivering %s",
5947 (int)pid, status & 0x00ff, message_id);
5948 if (mua_wrapper && (status & 0xffff) != 0) exim_exit(EXIT_FAILURE);
5953 /* The loop will repeat if more is TRUE. If we do not know know that the OS
5954 automatically reaps children (see comments above the loop), clear away any
5955 finished subprocesses here, in case there are lots of messages coming in
5956 from the same source. */
5958 #ifndef SIG_IGN_WORKS
5959 while (waitpid(-1, NULL, WNOHANG) > 0);
5963 return_path = sender_address = NULL;
5964 authenticated_sender = NULL;
5965 deliver_localpart_orig = NULL;
5966 deliver_domain_orig = NULL;
5967 deliver_host = deliver_host_address = NULL;
5968 dnslist_domain = dnslist_matched = NULL;
5969 #ifdef WITH_CONTENT_SCAN
5970 malware_name = NULL;
5972 callout_address = NULL;
5973 sending_ip_address = NULL;
5974 deliver_localpart_data = deliver_domain_data =
5975 recipient_data = sender_data = NULL;
5977 for(int i = 0; i < REGEX_VARS; i++) regex_vars[i] = NULL;
5979 store_reset(reset_point);
5982 exim_exit(EXIT_SUCCESS); /* Never returns */
5983 return 0; /* To stop compiler warning */