1 /* $Cambridge: exim/src/src/exim.c,v 1.71 2010/06/07 00:12:42 pdp Exp $ */
3 /*************************************************
4 * Exim - an Internet mail transport agent *
5 *************************************************/
7 /* Copyright (c) University of Cambridge 1995 - 2009 */
8 /* See the file NOTICE for conditions of use and distribution. */
11 /* The main function: entry point, initialization, and high-level control.
12 Also a few functions that don't naturally fit elsewhere. */
17 extern void init_lookup_list(void);
21 /*************************************************
22 * Function interface to store functions *
23 *************************************************/
25 /* We need some real functions to pass to the PCRE regular expression library
26 for store allocation via Exim's store manager. The normal calls are actually
27 macros that pass over location information to make tracing easier. These
28 functions just interface to the standard macro calls. A good compiler will
29 optimize out the tail recursion and so not make them too expensive. There
30 are two sets of functions; one for use when we want to retain the compiled
31 regular expression for a long time; the other for short-term use. */
34 function_store_get(size_t size)
36 return store_get((int)size);
40 function_dummy_free(void *block) { block = block; }
43 function_store_malloc(size_t size)
45 return store_malloc((int)size);
49 function_store_free(void *block)
57 /*************************************************
58 * Compile regular expression and panic on fail *
59 *************************************************/
61 /* This function is called when failure to compile a regular expression leads
62 to a panic exit. In other cases, pcre_compile() is called directly. In many
63 cases where this function is used, the results of the compilation are to be
64 placed in long-lived store, so we temporarily reset the store management
65 functions that PCRE uses if the use_malloc flag is set.
68 pattern the pattern to compile
69 caseless TRUE if caseless matching is required
70 use_malloc TRUE if compile into malloc store
72 Returns: pointer to the compiled pattern
76 regex_must_compile(uschar *pattern, BOOL caseless, BOOL use_malloc)
79 int options = PCRE_COPT;
84 pcre_malloc = function_store_malloc;
85 pcre_free = function_store_free;
87 if (caseless) options |= PCRE_CASELESS;
88 yield = pcre_compile(CS pattern, options, (const char **)&error, &offset, NULL);
89 pcre_malloc = function_store_get;
90 pcre_free = function_dummy_free;
92 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "regular expression error: "
93 "%s at offset %d while compiling %s", error, offset, pattern);
100 /*************************************************
101 * Execute regular expression and set strings *
102 *************************************************/
104 /* This function runs a regular expression match, and sets up the pointers to
105 the matched substrings.
108 re the compiled expression
109 subject the subject string
110 options additional PCRE options
111 setup if < 0 do full setup
112 if >= 0 setup from setup+1 onwards,
113 excluding the full matched string
115 Returns: TRUE or FALSE
119 regex_match_and_setup(const pcre *re, uschar *subject, int options, int setup)
121 int ovector[3*(EXPAND_MAXN+1)];
122 int n = pcre_exec(re, NULL, CS subject, Ustrlen(subject), 0,
123 PCRE_EOPT | options, ovector, sizeof(ovector)/sizeof(int));
125 if (n == 0) n = EXPAND_MAXN + 1;
129 expand_nmax = (setup < 0)? 0 : setup + 1;
130 for (nn = (setup < 0)? 0 : 2; nn < n*2; nn += 2)
132 expand_nstring[expand_nmax] = subject + ovector[nn];
133 expand_nlength[expand_nmax++] = ovector[nn+1] - ovector[nn];
143 /*************************************************
144 * Handler for SIGUSR1 *
145 *************************************************/
147 /* SIGUSR1 causes any exim process to write to the process log details of
148 what it is currently doing. It will only be used if the OS is capable of
149 setting up a handler that causes automatic restarting of any system call
150 that is in progress at the time.
152 Argument: the signal number (SIGUSR1)
157 usr1_handler(int sig)
159 sig = sig; /* Keep picky compilers happy */
160 log_write(0, LOG_PROCESS, "%s", process_info);
162 os_restarting_signal(SIGUSR1, usr1_handler);
167 /*************************************************
169 *************************************************/
171 /* This handler is enabled most of the time that Exim is running. The handler
172 doesn't actually get used unless alarm() has been called to set a timer, to
173 place a time limit on a system call of some kind. When the handler is run, it
176 There are some other SIGALRM handlers that are used in special cases when more
177 than just a flag setting is required; for example, when reading a message's
178 input. These are normally set up in the code module that uses them, and the
179 SIGALRM handler is reset to this one afterwards.
181 Argument: the signal value (SIGALRM)
186 sigalrm_handler(int sig)
188 sig = sig; /* Keep picky compilers happy */
190 os_non_restarting_signal(SIGALRM, sigalrm_handler);
195 /*************************************************
196 * Sleep for a fractional time interval *
197 *************************************************/
199 /* This function is called by millisleep() and exim_wait_tick() to wait for a
200 period of time that may include a fraction of a second. The coding is somewhat
201 tedious. We do not expect setitimer() ever to fail, but if it does, the process
202 will wait for ever, so we panic in this instance. (There was a case of this
203 when a bug in a function that calls milliwait() caused it to pass invalid data.
204 That's when I added the check. :-)
206 Argument: an itimerval structure containing the interval
211 milliwait(struct itimerval *itval)
214 sigset_t old_sigmask;
215 (void)sigemptyset(&sigmask); /* Empty mask */
216 (void)sigaddset(&sigmask, SIGALRM); /* Add SIGALRM */
217 (void)sigprocmask(SIG_BLOCK, &sigmask, &old_sigmask); /* Block SIGALRM */
218 if (setitimer(ITIMER_REAL, itval, NULL) < 0) /* Start timer */
219 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
220 "setitimer() failed: %s", strerror(errno));
221 (void)sigfillset(&sigmask); /* All signals */
222 (void)sigdelset(&sigmask, SIGALRM); /* Remove SIGALRM */
223 (void)sigsuspend(&sigmask); /* Until SIGALRM */
224 (void)sigprocmask(SIG_SETMASK, &old_sigmask, NULL); /* Restore mask */
230 /*************************************************
231 * Millisecond sleep function *
232 *************************************************/
234 /* The basic sleep() function has a granularity of 1 second, which is too rough
235 in some cases - for example, when using an increasing delay to slow down
238 Argument: number of millseconds
245 struct itimerval itval;
246 itval.it_interval.tv_sec = 0;
247 itval.it_interval.tv_usec = 0;
248 itval.it_value.tv_sec = msec/1000;
249 itval.it_value.tv_usec = (msec % 1000) * 1000;
255 /*************************************************
256 * Compare microsecond times *
257 *************************************************/
264 Returns: -1, 0, or +1
268 exim_tvcmp(struct timeval *t1, struct timeval *t2)
270 if (t1->tv_sec > t2->tv_sec) return +1;
271 if (t1->tv_sec < t2->tv_sec) return -1;
272 if (t1->tv_usec > t2->tv_usec) return +1;
273 if (t1->tv_usec < t2->tv_usec) return -1;
280 /*************************************************
281 * Clock tick wait function *
282 *************************************************/
284 /* Exim uses a time + a pid to generate a unique identifier in two places: its
285 message IDs, and in file names for maildir deliveries. Because some OS now
286 re-use pids within the same second, sub-second times are now being used.
287 However, for absolute certaintly, we must ensure the clock has ticked before
288 allowing the relevant process to complete. At the time of implementation of
289 this code (February 2003), the speed of processors is such that the clock will
290 invariably have ticked already by the time a process has done its job. This
291 function prepares for the time when things are faster - and it also copes with
292 clocks that go backwards.
295 then_tv A timeval which was used to create uniqueness; its usec field
296 has been rounded down to the value of the resolution.
297 We want to be sure the current time is greater than this.
298 resolution The resolution that was used to divide the microseconds
299 (1 for maildir, larger for message ids)
305 exim_wait_tick(struct timeval *then_tv, int resolution)
307 struct timeval now_tv;
308 long int now_true_usec;
310 (void)gettimeofday(&now_tv, NULL);
311 now_true_usec = now_tv.tv_usec;
312 now_tv.tv_usec = (now_true_usec/resolution) * resolution;
314 if (exim_tvcmp(&now_tv, then_tv) <= 0)
316 struct itimerval itval;
317 itval.it_interval.tv_sec = 0;
318 itval.it_interval.tv_usec = 0;
319 itval.it_value.tv_sec = then_tv->tv_sec - now_tv.tv_sec;
320 itval.it_value.tv_usec = then_tv->tv_usec + resolution - now_true_usec;
322 /* We know that, overall, "now" is less than or equal to "then". Therefore, a
323 negative value for the microseconds is possible only in the case when "now"
324 is more than a second less than "then". That means that itval.it_value.tv_sec
325 is greater than zero. The following correction is therefore safe. */
327 if (itval.it_value.tv_usec < 0)
329 itval.it_value.tv_usec += 1000000;
330 itval.it_value.tv_sec -= 1;
333 DEBUG(D_transport|D_receive)
335 if (!running_in_test_harness)
337 debug_printf("tick check: %lu.%06lu %lu.%06lu\n",
338 then_tv->tv_sec, then_tv->tv_usec, now_tv.tv_sec, now_tv.tv_usec);
339 debug_printf("waiting %lu.%06lu\n", itval.it_value.tv_sec,
340 itval.it_value.tv_usec);
351 /*************************************************
352 * Set up processing details *
353 *************************************************/
355 /* Save a text string for dumping when SIGUSR1 is received.
356 Do checks for overruns.
358 Arguments: format and arguments, as for printf()
363 set_process_info(char *format, ...)
367 sprintf(CS process_info, "%5d ", (int)getpid());
368 len = Ustrlen(process_info);
369 va_start(ap, format);
370 if (!string_vformat(process_info + len, PROCESS_INFO_SIZE - len, format, ap))
371 Ustrcpy(process_info + len, "**** string overflowed buffer ****");
372 DEBUG(D_process_info) debug_printf("set_process_info: %s\n", process_info);
380 /*************************************************
381 * Call fopen() with umask 777 and adjust mode *
382 *************************************************/
384 /* Exim runs with umask(0) so that files created with open() have the mode that
385 is specified in the open() call. However, there are some files, typically in
386 the spool directory, that are created with fopen(). They end up world-writeable
387 if no precautions are taken. Although the spool directory is not accessible to
388 the world, this is an untidiness. So this is a wrapper function for fopen()
389 that sorts out the mode of the created file.
392 filename the file name
393 options the fopen() options
394 mode the required mode
396 Returns: the fopened FILE or NULL
400 modefopen(uschar *filename, char *options, mode_t mode)
402 mode_t saved_umask = umask(0777);
403 FILE *f = Ufopen(filename, options);
404 (void)umask(saved_umask);
405 if (f != NULL) (void)fchmod(fileno(f), mode);
412 /*************************************************
413 * Ensure stdin, stdout, and stderr exist *
414 *************************************************/
416 /* Some operating systems grumble if an exec() happens without a standard
417 input, output, and error (fds 0, 1, 2) being defined. The worry is that some
418 file will be opened and will use these fd values, and then some other bit of
419 code will assume, for example, that it can write error messages to stderr.
420 This function ensures that fds 0, 1, and 2 are open if they do not already
421 exist, by connecting them to /dev/null.
423 This function is also used to ensure that std{in,out,err} exist at all times,
424 so that if any library that Exim calls tries to use them, it doesn't crash.
436 for (i = 0; i <= 2; i++)
438 if (fstat(i, &statbuf) < 0 && errno == EBADF)
440 if (devnull < 0) devnull = open("/dev/null", O_RDWR);
441 if (devnull < 0) log_write(0, LOG_MAIN|LOG_PANIC_DIE, "%s",
442 string_open_failed(errno, "/dev/null"));
443 if (devnull != i) (void)dup2(devnull, i);
446 if (devnull > 2) (void)close(devnull);
452 /*************************************************
453 * Close unwanted file descriptors for delivery *
454 *************************************************/
456 /* This function is called from a new process that has been forked to deliver
457 an incoming message, either directly, or using exec.
459 We want any smtp input streams to be closed in this new process. However, it
460 has been observed that using fclose() here causes trouble. When reading in -bS
461 input, duplicate copies of messages have been seen. The files will be sharing a
462 file pointer with the parent process, and it seems that fclose() (at least on
463 some systems - I saw this on Solaris 2.5.1) messes with that file pointer, at
464 least sometimes. Hence we go for closing the underlying file descriptors.
466 If TLS is active, we want to shut down the TLS library, but without molesting
467 the parent's SSL connection.
469 For delivery of a non-SMTP message, we want to close stdin and stdout (and
470 stderr unless debugging) because the calling process might have set them up as
471 pipes and be waiting for them to close before it waits for the submission
472 process to terminate. If they aren't closed, they hold up the calling process
473 until the initial delivery process finishes, which is not what we want.
475 Exception: We do want it for synchronous delivery!
477 And notwithstanding all the above, if D_resolver is set, implying resolver
478 debugging, leave stdout open, because that's where the resolver writes its
481 When we close stderr (which implies we've also closed stdout), we also get rid
482 of any controlling terminal.
494 tls_close(FALSE); /* Shut down the TLS library */
496 (void)close(fileno(smtp_in));
497 (void)close(fileno(smtp_out));
502 (void)close(0); /* stdin */
503 if ((debug_selector & D_resolver) == 0) (void)close(1); /* stdout */
504 if (debug_selector == 0) /* stderr */
506 if (!synchronous_delivery)
519 /*************************************************
521 *************************************************/
523 /* This function sets a new uid and gid permanently, optionally calling
524 initgroups() to set auxiliary groups. There are some special cases when running
525 Exim in unprivileged modes. In these situations the effective uid will not be
526 root; if we already have the right effective uid/gid, and don't need to
527 initialize any groups, leave things as they are.
532 igflag TRUE if initgroups() wanted
533 msg text to use in debugging output and failure log
535 Returns: nothing; bombs out on failure
539 exim_setugid(uid_t uid, gid_t gid, BOOL igflag, uschar *msg)
541 uid_t euid = geteuid();
542 gid_t egid = getegid();
544 if (euid == root_uid || euid != uid || egid != gid || igflag)
546 /* At least one OS returns +1 for initgroups failure, so just check for
551 struct passwd *pw = getpwuid(uid);
554 if (initgroups(pw->pw_name, gid) != 0)
555 log_write(0,LOG_MAIN|LOG_PANIC_DIE,"initgroups failed for uid=%ld: %s",
556 (long int)uid, strerror(errno));
558 else log_write(0, LOG_MAIN|LOG_PANIC_DIE, "cannot run initgroups(): "
559 "no passwd entry for uid=%ld", (long int)uid);
562 if (setgid(gid) < 0 || setuid(uid) < 0)
564 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "unable to set gid=%ld or uid=%ld "
565 "(euid=%ld): %s", (long int)gid, (long int)uid, (long int)euid, msg);
569 /* Debugging output included uid/gid and all groups */
573 int group_count, save_errno;
574 gid_t group_list[NGROUPS_MAX];
575 debug_printf("changed uid/gid: %s\n uid=%ld gid=%ld pid=%ld\n", msg,
576 (long int)geteuid(), (long int)getegid(), (long int)getpid());
577 group_count = getgroups(NGROUPS_MAX, group_list);
579 debug_printf(" auxiliary group list:");
583 for (i = 0; i < group_count; i++) debug_printf(" %d", (int)group_list[i]);
585 else if (group_count < 0)
586 debug_printf(" <error: %s>", strerror(save_errno));
587 else debug_printf(" <none>");
595 /*************************************************
597 *************************************************/
599 /* Exim exits via this function so that it always clears up any open
605 Returns: does not return
613 debug_printf(">>>>>>>>>>>>>>>> Exim pid=%d terminating with rc=%d "
614 ">>>>>>>>>>>>>>>>\n", (int)getpid(), rc);
621 /*************************************************
622 * Extract port from host address *
623 *************************************************/
625 /* Called to extract the port from the values given to -oMa and -oMi.
626 It also checks the syntax of the address, and terminates it before the
627 port data when a port is extracted.
630 address the address, with possible port on the end
632 Returns: the port, or zero if there isn't one
633 bombs out on a syntax error
637 check_port(uschar *address)
639 int port = host_address_extract_port(address);
640 if (string_is_ip_address(address, NULL) == 0)
642 fprintf(stderr, "exim abandoned: \"%s\" is not an IP address\n", address);
650 /*************************************************
651 * Test/verify an address *
652 *************************************************/
654 /* This function is called by the -bv and -bt code. It extracts a working
655 address from a full RFC 822 address. This isn't really necessary per se, but it
656 has the effect of collapsing source routes.
660 flags flag bits for verify_address()
661 exit_value to be set for failures
667 test_address(uschar *s, int flags, int *exit_value)
669 int start, end, domain;
670 uschar *parse_error = NULL;
671 uschar *address = parse_extract_address(s, &parse_error, &start, &end, &domain,
675 fprintf(stdout, "syntax error: %s\n", parse_error);
680 int rc = verify_address(deliver_make_addr(address,TRUE), stdout, flags, -1,
681 -1, -1, NULL, NULL, NULL);
682 if (rc == FAIL) *exit_value = 2;
683 else if (rc == DEFER && *exit_value == 0) *exit_value = 1;
689 /*************************************************
690 * Show supported features *
691 *************************************************/
693 /* This function is called for -bV/--version and for -d to output the optional
694 features of the current Exim binary.
696 Arguments: a FILE for printing
701 show_whats_supported(FILE *f)
703 #ifdef DB_VERSION_STRING
704 fprintf(f, "Berkeley DB: %s\n", DB_VERSION_STRING);
705 #elif defined(BTREEVERSION) && defined(HASHVERSION)
707 fprintf(f, "Probably Berkeley DB version 1.8x (native mode)\n");
709 fprintf(f, "Probably Berkeley DB version 1.8x (compatibility mode)\n");
711 #elif defined(_DBM_RDONLY) || defined(dbm_dirfno)
712 fprintf(f, "Probably ndbm\n");
713 #elif defined(USE_TDB)
714 fprintf(f, "Using tdb\n");
717 fprintf(f, "Probably GDBM (native mode)\n");
719 fprintf(f, "Probably GDBM (compatibility mode)\n");
723 fprintf(f, "Support for:");
724 #ifdef SUPPORT_CRYPTEQ
725 fprintf(f, " crypteq");
728 fprintf(f, " iconv()");
733 #ifdef HAVE_SETCLASSRESOURCES
734 fprintf(f, " use_setclassresources");
743 fprintf(f, " Expand_dlfunc");
745 #ifdef USE_TCP_WRAPPERS
746 fprintf(f, " TCPwrappers");
750 fprintf(f, " GnuTLS");
752 fprintf(f, " OpenSSL");
755 #ifdef SUPPORT_TRANSLATE_IP_ADDRESS
756 fprintf(f, " translate_ip_address");
758 #ifdef SUPPORT_MOVE_FROZEN_MESSAGES
759 fprintf(f, " move_frozen_messages");
761 #ifdef WITH_CONTENT_SCAN
762 fprintf(f, " Content_Scanning");
767 #ifdef WITH_OLD_DEMIME
768 fprintf(f, " Old_Demime");
770 #ifdef EXPERIMENTAL_SPF
771 fprintf(f, " Experimental_SPF");
773 #ifdef EXPERIMENTAL_SRS
774 fprintf(f, " Experimental_SRS");
776 #ifdef EXPERIMENTAL_BRIGHTMAIL
777 fprintf(f, " Experimental_Brightmail");
779 #ifdef EXPERIMENTAL_DCC
780 fprintf(f, " Experimental_DCC");
784 fprintf(f, "Lookups (built-in):");
785 #if defined(LOOKUP_LSEARCH) && LOOKUP_LSEARCH!=2
786 fprintf(f, " lsearch wildlsearch nwildlsearch iplsearch");
788 #if defined(LOOKUP_CDB) && LOOKUP_CDB!=2
791 #if defined(LOOKUP_DBM) && LOOKUP_DBM!=2
792 fprintf(f, " dbm dbmnz");
794 #if defined(LOOKUP_DNSDB) && LOOKUP_DNSDB!=2
795 fprintf(f, " dnsdb");
797 #if defined(LOOKUP_DSEARCH) && LOOKUP_DSEARCH!=2
798 fprintf(f, " dsearch");
800 #if defined(LOOKUP_IBASE) && LOOKUP_IBASE!=2
801 fprintf(f, " ibase");
803 #if defined(LOOKUP_LDAP) && LOOKUP_LDAP!=2
804 fprintf(f, " ldap ldapdn ldapm");
806 #if defined(LOOKUP_MYSQL) && LOOKUP_MYSQL!=2
807 fprintf(f, " mysql");
809 #if defined(LOOKUP_NIS) && LOOKUP_NIS!=2
810 fprintf(f, " nis nis0");
812 #if defined(LOOKUP_NISPLUS) && LOOKUP_NISPLUS!=2
813 fprintf(f, " nisplus");
815 #if defined(LOOKUP_ORACLE) && LOOKUP_ORACLE!=2
816 fprintf(f, " oracle");
818 #if defined(LOOKUP_PASSWD) && LOOKUP_PASSWD!=2
819 fprintf(f, " passwd");
821 #if defined(LOOKUP_PGSQL) && LOOKUP_PGSQL!=2
822 fprintf(f, " pgsql");
824 #if defined(LOOKUP_SQLITE) && LOOKUP_SQLITE!=2
825 fprintf(f, " sqlite");
827 #if defined(LOOKUP_TESTDB) && LOOKUP_TESTDB!=2
828 fprintf(f, " testdb");
830 #if defined(LOOKUP_WHOSON) && LOOKUP_WHOSON!=2
831 fprintf(f, " whoson");
835 fprintf(f, "Authenticators:");
837 fprintf(f, " cram_md5");
839 #ifdef AUTH_CYRUS_SASL
840 fprintf(f, " cyrus_sasl");
843 fprintf(f, " dovecot");
845 #ifdef AUTH_PLAINTEXT
846 fprintf(f, " plaintext");
853 fprintf(f, "Routers:");
855 fprintf(f, " accept");
857 #ifdef ROUTER_DNSLOOKUP
858 fprintf(f, " dnslookup");
860 #ifdef ROUTER_IPLITERAL
861 fprintf(f, " ipliteral");
863 #ifdef ROUTER_IPLOOKUP
864 fprintf(f, " iplookup");
866 #ifdef ROUTER_MANUALROUTE
867 fprintf(f, " manualroute");
869 #ifdef ROUTER_QUERYPROGRAM
870 fprintf(f, " queryprogram");
872 #ifdef ROUTER_REDIRECT
873 fprintf(f, " redirect");
877 fprintf(f, "Transports:");
878 #ifdef TRANSPORT_APPENDFILE
879 fprintf(f, " appendfile");
880 #ifdef SUPPORT_MAILDIR
881 fprintf(f, "/maildir");
883 #ifdef SUPPORT_MAILSTORE
884 fprintf(f, "/mailstore");
890 #ifdef TRANSPORT_AUTOREPLY
891 fprintf(f, " autoreply");
893 #ifdef TRANSPORT_LMTP
896 #ifdef TRANSPORT_PIPE
899 #ifdef TRANSPORT_SMTP
904 if (fixed_never_users[0] > 0)
907 fprintf(f, "Fixed never_users: ");
908 for (i = 1; i <= (int)fixed_never_users[0] - 1; i++)
909 fprintf(f, "%d:", (unsigned int)fixed_never_users[i]);
910 fprintf(f, "%d\n", (unsigned int)fixed_never_users[i]);
913 fprintf(f, "Size of off_t: " SIZE_T_FMT "\n", sizeof(off_t));
915 /* This runtime check is to help diagnose library linkage mismatches which
916 result in segfaults and the like; as such, it's left until the end,
917 just in case. There will still be a "Configuration file is" line still to
920 tls_version_report(f);
923 /* Everything else is details which are only worth reporting when debugging.
924 Perhaps the tls_version_report should move into this too. */
929 #ifdef AUTH_CYRUS_SASL
930 auth_cyrus_sasl_version_report(f);
933 fprintf(f, "Library version: PCRE: Compile: %d.%d%s\n"
935 PCRE_MAJOR, PCRE_MINOR,
936 /* PRE_PRERELEASE is either defined and empty or a string.
937 * unless its an ancient version of PCRE in which case it
939 #ifdef PCRE_PRERELEASE
947 for (i = 0; i < lookup_list_count; i++)
949 if (lookup_list[i]->version_report)
950 lookup_list[i]->version_report(f);
953 #ifdef WHITELIST_D_MACROS
954 fprintf(f, "WHITELIST_D_MACROS: \"%s\"\n", WHITELIST_D_MACROS);
956 fprintf(f, "WHITELIST_D_MACROS unset\n");
958 #ifdef TRUSTED_CONFIG_LIST
959 fprintf(f, "TRUSTED_CONFIG_LIST: \"%s\"\n", TRUSTED_CONFIG_LIST);
961 fprintf(f, "TRUSTED_CONFIG_LIST unset\n");
970 /*************************************************
971 * Quote a local part *
972 *************************************************/
974 /* This function is used when a sender address or a From: or Sender: header
975 line is being created from the caller's login, or from an authenticated_id. It
976 applies appropriate quoting rules for a local part.
978 Argument: the local part
979 Returns: the local part, quoted if necessary
983 local_part_quote(uschar *lpart)
985 BOOL needs_quote = FALSE;
990 for (t = lpart; !needs_quote && *t != 0; t++)
992 needs_quote = !isalnum(*t) && strchr("!#$%&'*+-/=?^_`{|}~", *t) == NULL &&
993 (*t != '.' || t == lpart || t[1] == 0);
996 if (!needs_quote) return lpart;
999 yield = string_cat(NULL, &size, &ptr, US"\"", 1);
1003 uschar *nq = US Ustrpbrk(lpart, "\\\"");
1006 yield = string_cat(yield, &size, &ptr, lpart, Ustrlen(lpart));
1009 yield = string_cat(yield, &size, &ptr, lpart, nq - lpart);
1010 yield = string_cat(yield, &size, &ptr, US"\\", 1);
1011 yield = string_cat(yield, &size, &ptr, nq, 1);
1015 yield = string_cat(yield, &size, &ptr, US"\"", 1);
1023 /*************************************************
1024 * Load readline() functions *
1025 *************************************************/
1027 /* This function is called from testing executions that read data from stdin,
1028 but only when running as the calling user. Currently, only -be does this. The
1029 function loads the readline() function library and passes back the functions.
1030 On some systems, it needs the curses library, so load that too, but try without
1031 it if loading fails. All this functionality has to be requested at build time.
1034 fn_readline_ptr pointer to where to put the readline pointer
1035 fn_addhist_ptr pointer to where to put the addhistory function
1037 Returns: the dlopen handle or NULL on failure
1041 set_readline(char * (**fn_readline_ptr)(char *),
1042 char * (**fn_addhist_ptr)(char *))
1045 void *dlhandle_curses = dlopen("libcurses.so", RTLD_GLOBAL|RTLD_LAZY);
1047 dlhandle = dlopen("libreadline.so", RTLD_GLOBAL|RTLD_NOW);
1048 if (dlhandle_curses != NULL) dlclose(dlhandle_curses);
1050 if (dlhandle != NULL)
1052 *fn_readline_ptr = (char *(*)(char*))dlsym(dlhandle, "readline");
1053 *fn_addhist_ptr = (char *(*)(char*))dlsym(dlhandle, "add_history");
1057 DEBUG(D_any) debug_printf("failed to load readline: %s\n", dlerror());
1066 /*************************************************
1067 * Get a line from stdin for testing things *
1068 *************************************************/
1070 /* This function is called when running tests that can take a number of lines
1071 of input (for example, -be and -bt). It handles continuations and trailing
1072 spaces. And prompting and a blank line output on eof. If readline() is in use,
1073 the arguments are non-NULL and provide the relevant functions.
1076 fn_readline readline function or NULL
1077 fn_addhist addhist function or NULL
1079 Returns: pointer to dynamic memory, or NULL at end of file
1083 get_stdinput(char *(*fn_readline)(char *), char *(*fn_addhist)(char *))
1088 uschar *yield = NULL;
1090 if (fn_readline == NULL) { printf("> "); fflush(stdout); }
1094 uschar buffer[1024];
1098 char *readline_line = NULL;
1099 if (fn_readline != NULL)
1101 if ((readline_line = fn_readline((i > 0)? "":"> ")) == NULL) break;
1102 if (*readline_line != 0 && fn_addhist != NULL) fn_addhist(readline_line);
1103 p = US readline_line;
1108 /* readline() not in use */
1111 if (Ufgets(buffer, sizeof(buffer), stdin) == NULL) break;
1115 /* Handle the line */
1117 ss = p + (int)Ustrlen(p);
1118 while (ss > p && isspace(ss[-1])) ss--;
1122 while (p < ss && isspace(*p)) p++; /* leading space after cont */
1125 yield = string_cat(yield, &size, &ptr, p, ss - p);
1128 if (fn_readline != NULL) free(readline_line);
1131 if (ss == p || yield[ptr-1] != '\\')
1139 if (yield == NULL) printf("\n");
1145 /*************************************************
1146 * Output usage information for the program *
1147 *************************************************/
1149 /* This function is called when there are no recipients
1150 or a specific --help argument was added.
1153 progname information on what name we were called by
1155 Returns: DOES NOT RETURN
1159 exim_usage(uschar *progname)
1162 /* Handle specific program invocation varients */
1163 if (Ustrcmp(progname, US"-mailq") == 0)
1166 "mailq - list the contents of the mail queue\n\n"
1167 "For a list of options, see the Exim documentation.\n");
1171 /* Generic usage - we output this whatever happens */
1173 "Exim is a Mail Transfer Agent. It is normally called by Mail User Agents,\n"
1174 "not directly from a shell command line. Options and/or arguments control\n"
1175 "what it does when called. For a list of options, see the Exim documentation.\n");
1182 /*************************************************
1183 * Validate that the macros given are okay *
1184 *************************************************/
1186 /* Typically, Exim will drop privileges if macros are supplied. In some
1187 cases, we want to not do so.
1189 Arguments: none (macros is a global)
1190 Returns: true if trusted, false otherwise
1194 macros_trusted(void)
1196 #ifdef WHITELIST_D_MACROS
1198 uschar *whitelisted, *end, *p, **whites, **w;
1199 int white_count, i, n;
1201 BOOL prev_char_item, found;
1206 #ifndef WHITELIST_D_MACROS
1210 /* We only trust -D overrides for some invoking users:
1211 root, the exim run-time user, the optional config owner user.
1212 I don't know why config-owner would be needed, but since they can own the
1213 config files anyway, there's no security risk to letting them override -D. */
1214 if ( ! ((real_uid == root_uid)
1215 || (real_uid == exim_uid)
1216 #ifdef CONFIGURE_OWNER
1217 || (real_uid == config_uid)
1221 debug_printf("macros_trusted rejecting macros for uid %d\n", (int) real_uid);
1225 /* Get a list of macros which are whitelisted */
1226 whitelisted = string_copy_malloc(US WHITELIST_D_MACROS);
1227 prev_char_item = FALSE;
1229 for (p = whitelisted; *p != '\0'; ++p)
1231 if (*p == ':' || isspace(*p))
1236 prev_char_item = FALSE;
1239 if (!prev_char_item)
1240 prev_char_item = TRUE;
1247 whites = store_malloc(sizeof(uschar *) * (white_count+1));
1248 for (p = whitelisted, i = 0; (p != end) && (i < white_count); ++p)
1253 if (i == white_count)
1255 while (*p != '\0' && p < end)
1261 /* The list of macros should be very short. Accept the N*M complexity. */
1262 for (m = macros; m != NULL; m = m->next)
1265 for (w = whites; *w; ++w)
1266 if (Ustrcmp(*w, m->name) == 0)
1273 if (m->replacement == NULL)
1275 len = Ustrlen(m->replacement);
1278 n = pcre_exec(regex_whitelisted_macro, NULL, CS m->replacement, len,
1279 0, PCRE_EOPT, NULL, 0);
1282 if (n != PCRE_ERROR_NOMATCH)
1283 debug_printf("macros_trusted checking %s returned %d\n", m->name, n);
1287 DEBUG(D_any) debug_printf("macros_trusted overriden to true by whitelisting\n");
1293 /*************************************************
1294 * Entry point and high-level code *
1295 *************************************************/
1297 /* Entry point for the Exim mailer. Analyse the arguments and arrange to take
1298 the appropriate action. All the necessary functions are present in the one
1299 binary. I originally thought one should split it up, but it turns out that so
1300 much of the apparatus is needed in each chunk that one might as well just have
1301 it all available all the time, which then makes the coding easier as well.
1304 argc count of entries in argv
1305 argv argument strings, with argv[0] being the program name
1307 Returns: EXIT_SUCCESS if terminated successfully
1308 EXIT_FAILURE otherwise, except when a message has been sent
1309 to the sender, and -oee was given
1313 main(int argc, char **cargv)
1315 uschar **argv = USS cargv;
1316 int arg_receive_timeout = -1;
1317 int arg_smtp_receive_timeout = -1;
1318 int arg_error_handling = error_handling;
1319 int filter_sfd = -1;
1320 int filter_ufd = -1;
1323 int list_queue_option = 0;
1325 int msg_action_arg = -1;
1326 int namelen = (argv[0] == NULL)? 0 : Ustrlen(argv[0]);
1327 int queue_only_reason = 0;
1329 int perl_start_option = 0;
1331 int recipients_arg = argc;
1332 int sender_address_domain = 0;
1333 int test_retry_arg = -1;
1334 int test_rewrite_arg = -1;
1335 BOOL arg_queue_only = FALSE;
1336 BOOL bi_option = FALSE;
1337 BOOL checking = FALSE;
1338 BOOL count_queue = FALSE;
1339 BOOL expansion_test = FALSE;
1340 BOOL extract_recipients = FALSE;
1341 BOOL forced_delivery = FALSE;
1342 BOOL f_end_dot = FALSE;
1343 BOOL deliver_give_up = FALSE;
1344 BOOL list_queue = FALSE;
1345 BOOL list_options = FALSE;
1346 BOOL local_queue_only;
1348 BOOL one_msg_action = FALSE;
1349 BOOL queue_only_set = FALSE;
1350 BOOL receiving_message = TRUE;
1351 BOOL sender_ident_set = FALSE;
1352 BOOL session_local_queue_only;
1354 BOOL removed_privilege = FALSE;
1355 BOOL usage_wanted = FALSE;
1356 BOOL verify_address_mode = FALSE;
1357 BOOL verify_as_sender = FALSE;
1358 BOOL version_printed = FALSE;
1359 uschar *alias_arg = NULL;
1360 uschar *called_as = US"";
1361 uschar *start_queue_run_id = NULL;
1362 uschar *stop_queue_run_id = NULL;
1363 uschar *expansion_test_message = NULL;
1364 uschar *ftest_domain = NULL;
1365 uschar *ftest_localpart = NULL;
1366 uschar *ftest_prefix = NULL;
1367 uschar *ftest_suffix = NULL;
1368 uschar *malware_test_file = NULL;
1369 uschar *real_sender_address;
1370 uschar *originator_home = US"/";
1374 struct stat statbuf;
1375 pid_t passed_qr_pid = (pid_t)0;
1376 int passed_qr_pipe = -1;
1377 gid_t group_list[NGROUPS_MAX];
1379 /* Possible options for -R and -S */
1381 static uschar *rsopts[] = { US"f", US"ff", US"r", US"rf", US"rff" };
1383 /* Need to define this in case we need to change the environment in order
1384 to get rid of a bogus time zone. We have to make it char rather than uschar
1385 because some OS define it in /usr/include/unistd.h. */
1387 extern char **environ;
1389 /* If the Exim user and/or group and/or the configuration file owner/group were
1390 defined by ref:name at build time, we must now find the actual uid/gid values.
1391 This is a feature to make the lives of binary distributors easier. */
1393 #ifdef EXIM_USERNAME
1394 if (route_finduser(US EXIM_USERNAME, &pw, &exim_uid))
1398 fprintf(stderr, "exim: refusing to run with uid 0 for \"%s\"\n",
1402 exim_gid = pw->pw_gid;
1406 fprintf(stderr, "exim: failed to find uid for user name \"%s\"\n",
1412 #ifdef EXIM_GROUPNAME
1413 if (!route_findgroup(US EXIM_GROUPNAME, &exim_gid))
1415 fprintf(stderr, "exim: failed to find gid for group name \"%s\"\n",
1421 #ifdef CONFIGURE_OWNERNAME
1422 if (!route_finduser(US CONFIGURE_OWNERNAME, NULL, &config_uid))
1424 fprintf(stderr, "exim: failed to find uid for user name \"%s\"\n",
1425 CONFIGURE_OWNERNAME);
1430 /* We default the system_filter_user to be the Exim run-time user, as a
1431 sane non-root value. */
1432 system_filter_uid = exim_uid;
1434 #ifdef CONFIGURE_GROUPNAME
1435 if (!route_findgroup(US CONFIGURE_GROUPNAME, &config_gid))
1437 fprintf(stderr, "exim: failed to find gid for group name \"%s\"\n",
1438 CONFIGURE_GROUPNAME);
1443 /* In the Cygwin environment, some initialization needs doing. It is fudged
1444 in by means of this macro. */
1450 /* Check a field which is patched when we are running Exim within its
1451 testing harness; do a fast initial check, and then the whole thing. */
1453 running_in_test_harness =
1454 *running_status == '<' && Ustrcmp(running_status, "<<<testing>>>") == 0;
1456 /* The C standard says that the equivalent of setlocale(LC_ALL, "C") is obeyed
1457 at the start of a program; however, it seems that some environments do not
1458 follow this. A "strange" locale can affect the formatting of timestamps, so we
1461 setlocale(LC_ALL, "C");
1463 /* Set up the default handler for timing using alarm(). */
1465 os_non_restarting_signal(SIGALRM, sigalrm_handler);
1467 /* Ensure we have a buffer for constructing log entries. Use malloc directly,
1468 because store_malloc writes a log entry on failure. */
1470 log_buffer = (uschar *)malloc(LOG_BUFFER_SIZE);
1471 if (log_buffer == NULL)
1473 fprintf(stderr, "exim: failed to get store for log buffer\n");
1477 /* Set log_stderr to stderr, provided that stderr exists. This gets reset to
1478 NULL when the daemon is run and the file is closed. We have to use this
1479 indirection, because some systems don't allow writing to the variable "stderr".
1482 if (fstat(fileno(stderr), &statbuf) >= 0) log_stderr = stderr;
1484 /* Arrange for the PCRE regex library to use our store functions. Note that
1485 the normal calls are actually macros that add additional arguments for
1486 debugging purposes so we have to assign specially constructed functions here.
1487 The default is to use store in the stacking pool, but this is overridden in the
1488 regex_must_compile() function. */
1490 pcre_malloc = function_store_get;
1491 pcre_free = function_dummy_free;
1493 /* Ensure there is a big buffer for temporary use in several places. It is put
1494 in malloc store so that it can be freed for enlargement if necessary. */
1496 big_buffer = store_malloc(big_buffer_size);
1498 /* Set up the handler for the data request signal, and set the initial
1499 descriptive text. */
1501 set_process_info("initializing");
1502 os_restarting_signal(SIGUSR1, usr1_handler);
1504 /* SIGHUP is used to get the daemon to reconfigure. It gets set as appropriate
1505 in the daemon code. For the rest of Exim's uses, we ignore it. */
1507 signal(SIGHUP, SIG_IGN);
1509 /* We don't want to die on pipe errors as the code is written to handle
1510 the write error instead. */
1512 signal(SIGPIPE, SIG_IGN);
1514 /* Under some circumstance on some OS, Exim can get called with SIGCHLD
1515 set to SIG_IGN. This causes subprocesses that complete before the parent
1516 process waits for them not to hang around, so when Exim calls wait(), nothing
1517 is there. The wait() code has been made robust against this, but let's ensure
1518 that SIGCHLD is set to SIG_DFL, because it's tidier to wait and get a process
1519 ending status. We use sigaction rather than plain signal() on those OS where
1520 SA_NOCLDWAIT exists, because we want to be sure it is turned off. (There was a
1521 problem on AIX with this.) */
1525 struct sigaction act;
1526 act.sa_handler = SIG_DFL;
1527 sigemptyset(&(act.sa_mask));
1529 sigaction(SIGCHLD, &act, NULL);
1532 signal(SIGCHLD, SIG_DFL);
1535 /* Save the arguments for use if we re-exec exim as a daemon after receiving
1540 /* Set up the version number. Set up the leading 'E' for the external form of
1541 message ids, set the pointer to the internal form, and initialize it to
1542 indicate no message being processed. */
1545 message_id_option[0] = '-';
1546 message_id_external = message_id_option + 1;
1547 message_id_external[0] = 'E';
1548 message_id = message_id_external + 1;
1551 /* Set the umask to zero so that any files Exim creates using open() are
1552 created with the modes that it specifies. NOTE: Files created with fopen() have
1553 a problem, which was not recognized till rather late (February 2006). With this
1554 umask, such files will be world writeable. (They are all content scanning files
1555 in the spool directory, which isn't world-accessible, so this is not a
1556 disaster, but it's untidy.) I don't want to change this overall setting,
1557 however, because it will interact badly with the open() calls. Instead, there's
1558 now a function called modefopen() that fiddles with the umask while calling
1563 /* Precompile the regular expression for matching a message id. Keep this in
1564 step with the code that generates ids in the accept.c module. We need to do
1565 this here, because the -M options check their arguments for syntactic validity
1566 using mac_ismsgid, which uses this. */
1569 regex_must_compile(US"^(?:[^\\W_]{6}-){2}[^\\W_]{2}$", FALSE, TRUE);
1571 /* Precompile the regular expression that is used for matching an SMTP error
1572 code, possibly extended, at the start of an error message. Note that the
1573 terminating whitespace character is included. */
1576 regex_must_compile(US"^\\d\\d\\d\\s(?:\\d\\.\\d\\d?\\d?\\.\\d\\d?\\d?\\s)?",
1579 #ifdef WHITELIST_D_MACROS
1580 /* Precompile the regular expression used to filter the content of macros
1581 given to -D for permissibility. */
1583 regex_whitelisted_macro =
1584 regex_must_compile(US"^[A-Za-z0-9_/.-]*$", FALSE, TRUE);
1588 /* If the program is called as "mailq" treat it as equivalent to "exim -bp";
1589 this seems to be a generally accepted convention, since one finds symbolic
1590 links called "mailq" in standard OS configurations. */
1592 if ((namelen == 5 && Ustrcmp(argv[0], "mailq") == 0) ||
1593 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/mailq", 6) == 0))
1596 receiving_message = FALSE;
1597 called_as = US"-mailq";
1600 /* If the program is called as "rmail" treat it as equivalent to
1601 "exim -i -oee", thus allowing UUCP messages to be input using non-SMTP mode,
1602 i.e. preventing a single dot on a line from terminating the message, and
1603 returning with zero return code, even in cases of error (provided an error
1604 message has been sent). */
1606 if ((namelen == 5 && Ustrcmp(argv[0], "rmail") == 0) ||
1607 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/rmail", 6) == 0))
1610 called_as = US"-rmail";
1611 errors_sender_rc = EXIT_SUCCESS;
1614 /* If the program is called as "rsmtp" treat it as equivalent to "exim -bS";
1615 this is a smail convention. */
1617 if ((namelen == 5 && Ustrcmp(argv[0], "rsmtp") == 0) ||
1618 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/rsmtp", 6) == 0))
1620 smtp_input = smtp_batched_input = TRUE;
1621 called_as = US"-rsmtp";
1624 /* If the program is called as "runq" treat it as equivalent to "exim -q";
1625 this is a smail convention. */
1627 if ((namelen == 4 && Ustrcmp(argv[0], "runq") == 0) ||
1628 (namelen > 4 && Ustrncmp(argv[0] + namelen - 5, "/runq", 5) == 0))
1631 receiving_message = FALSE;
1632 called_as = US"-runq";
1635 /* If the program is called as "newaliases" treat it as equivalent to
1636 "exim -bi"; this is a sendmail convention. */
1638 if ((namelen == 10 && Ustrcmp(argv[0], "newaliases") == 0) ||
1639 (namelen > 10 && Ustrncmp(argv[0] + namelen - 11, "/newaliases", 11) == 0))
1642 receiving_message = FALSE;
1643 called_as = US"-newaliases";
1646 /* Save the original effective uid for a couple of uses later. It should
1647 normally be root, but in some esoteric environments it may not be. */
1649 original_euid = geteuid();
1651 /* Get the real uid and gid. If the caller is root, force the effective uid/gid
1652 to be the same as the real ones. This makes a difference only if Exim is setuid
1653 (or setgid) to something other than root, which could be the case in some
1654 special configurations. */
1656 real_uid = getuid();
1657 real_gid = getgid();
1659 if (real_uid == root_uid)
1661 rv = setgid(real_gid);
1664 fprintf(stderr, "exim: setgid(%ld) failed: %s\n",
1665 (long int)real_gid, strerror(errno));
1668 rv = setuid(real_uid);
1671 fprintf(stderr, "exim: setuid(%ld) failed: %s\n",
1672 (long int)real_uid, strerror(errno));
1677 /* If neither the original real uid nor the original euid was root, Exim is
1678 running in an unprivileged state. */
1680 unprivileged = (real_uid != root_uid && original_euid != root_uid);
1682 /* Scan the program's arguments. Some can be dealt with right away; others are
1683 simply recorded for checking and handling afterwards. Do a high-level switch
1684 on the second character (the one after '-'), to save some effort. */
1686 for (i = 1; i < argc; i++)
1688 BOOL badarg = FALSE;
1689 uschar *arg = argv[i];
1693 /* An argument not starting with '-' is the start of a recipients list;
1694 break out of the options-scanning loop. */
1702 /* An option consistion of -- terminates the options */
1704 if (Ustrcmp(arg, "--") == 0)
1706 recipients_arg = i + 1;
1710 /* Handle flagged options */
1712 switchchar = arg[1];
1715 /* Make all -ex options synonymous with -oex arguments, since that
1716 is assumed by various callers. Also make -qR options synonymous with -R
1717 options, as that seems to be required as well. Allow for -qqR too, and
1718 the same for -S options. */
1720 if (Ustrncmp(arg+1, "oe", 2) == 0 ||
1721 Ustrncmp(arg+1, "qR", 2) == 0 ||
1722 Ustrncmp(arg+1, "qS", 2) == 0)
1724 switchchar = arg[2];
1727 else if (Ustrncmp(arg+1, "qqR", 3) == 0 || Ustrncmp(arg+1, "qqS", 3) == 0)
1729 switchchar = arg[3];
1731 queue_2stage = TRUE;
1734 /* Make -r synonymous with -f, since it is a documented alias */
1736 else if (arg[1] == 'r') switchchar = 'f';
1738 /* Make -ov synonymous with -v */
1740 else if (Ustrcmp(arg, "-ov") == 0)
1746 /* deal with --option_aliases */
1747 else if (switchchar == '-')
1749 if (Ustrcmp(argrest, "help") == 0)
1751 usage_wanted = TRUE;
1754 else if (Ustrcmp(argrest, "version") == 0)
1761 /* High-level switch on active initial letter */
1765 /* -Btype is a sendmail option for 7bit/8bit setting. Exim is 8-bit clean
1766 so has no need of it. */
1769 if (*argrest == 0) i++; /* Skip over the type */
1774 receiving_message = FALSE; /* Reset TRUE for -bm, -bS, -bs below */
1776 /* -bd: Run in daemon mode, awaiting SMTP connections.
1777 -bdf: Ditto, but in the foreground.
1780 if (*argrest == 'd')
1782 daemon_listen = TRUE;
1783 if (*(++argrest) == 'f') background_daemon = FALSE;
1784 else if (*argrest != 0) { badarg = TRUE; break; }
1787 /* -be: Run in expansion test mode
1788 -bem: Ditto, but read a message from a file first
1791 else if (*argrest == 'e')
1793 expansion_test = checking = TRUE;
1794 if (argrest[1] == 'm')
1796 if (++i >= argc) { badarg = TRUE; break; }
1797 expansion_test_message = argv[i];
1800 if (argrest[1] != 0) { badarg = TRUE; break; }
1803 /* -bF: Run system filter test */
1805 else if (*argrest == 'F')
1807 filter_test |= FTEST_SYSTEM;
1808 if (*(++argrest) != 0) { badarg = TRUE; break; }
1809 if (++i < argc) filter_test_sfile = argv[i]; else
1811 fprintf(stderr, "exim: file name expected after %s\n", argv[i-1]);
1816 /* -bf: Run user filter test
1817 -bfd: Set domain for filter testing
1818 -bfl: Set local part for filter testing
1819 -bfp: Set prefix for filter testing
1820 -bfs: Set suffix for filter testing
1823 else if (*argrest == 'f')
1825 if (*(++argrest) == 0)
1827 filter_test |= FTEST_USER;
1828 if (++i < argc) filter_test_ufile = argv[i]; else
1830 fprintf(stderr, "exim: file name expected after %s\n", argv[i-1]);
1838 fprintf(stderr, "exim: string expected after %s\n", arg);
1841 if (Ustrcmp(argrest, "d") == 0) ftest_domain = argv[i];
1842 else if (Ustrcmp(argrest, "l") == 0) ftest_localpart = argv[i];
1843 else if (Ustrcmp(argrest, "p") == 0) ftest_prefix = argv[i];
1844 else if (Ustrcmp(argrest, "s") == 0) ftest_suffix = argv[i];
1845 else { badarg = TRUE; break; }
1849 /* -bh: Host checking - an IP address must follow. */
1851 else if (Ustrcmp(argrest, "h") == 0 || Ustrcmp(argrest, "hc") == 0)
1853 if (++i >= argc) { badarg = TRUE; break; }
1854 sender_host_address = argv[i];
1855 host_checking = checking = log_testing_mode = TRUE;
1856 host_checking_callout = argrest[1] == 'c';
1859 /* -bi: This option is used by sendmail to initialize *the* alias file,
1860 though it has the -oA option to specify a different file. Exim has no
1861 concept of *the* alias file, but since Sun's YP make script calls
1862 sendmail this way, some support must be provided. */
1864 else if (Ustrcmp(argrest, "i") == 0) bi_option = TRUE;
1866 /* -bm: Accept and deliver message - the default option. Reinstate
1867 receiving_message, which got turned off for all -b options. */
1869 else if (Ustrcmp(argrest, "m") == 0) receiving_message = TRUE;
1871 /* -bmalware: test the filename given for malware */
1873 else if (Ustrcmp(argrest, "malware") == 0)
1875 if (++i >= argc) { badarg = TRUE; break; }
1876 malware_test_file = argv[i];
1879 /* -bnq: For locally originating messages, do not qualify unqualified
1880 addresses. In the envelope, this causes errors; in header lines they
1883 else if (Ustrcmp(argrest, "nq") == 0)
1885 allow_unqualified_sender = FALSE;
1886 allow_unqualified_recipient = FALSE;
1889 /* -bpxx: List the contents of the mail queue, in various forms. If
1890 the option is -bpc, just a queue count is needed. Otherwise, if the
1891 first letter after p is r, then order is random. */
1893 else if (*argrest == 'p')
1895 if (*(++argrest) == 'c')
1898 if (*(++argrest) != 0) badarg = TRUE;
1902 if (*argrest == 'r')
1904 list_queue_option = 8;
1907 else list_queue_option = 0;
1911 /* -bp: List the contents of the mail queue, top-level only */
1913 if (*argrest == 0) {}
1915 /* -bpu: List the contents of the mail queue, top-level undelivered */
1917 else if (Ustrcmp(argrest, "u") == 0) list_queue_option += 1;
1919 /* -bpa: List the contents of the mail queue, including all delivered */
1921 else if (Ustrcmp(argrest, "a") == 0) list_queue_option += 2;
1923 /* Unknown after -bp[r] */
1933 /* -bP: List the configuration variables given as the address list.
1934 Force -v, so configuration errors get displayed. */
1936 else if (Ustrcmp(argrest, "P") == 0)
1938 list_options = TRUE;
1939 debug_selector |= D_v;
1940 debug_file = stderr;
1943 /* -brt: Test retry configuration lookup */
1945 else if (Ustrcmp(argrest, "rt") == 0)
1947 test_retry_arg = i + 1;
1951 /* -brw: Test rewrite configuration */
1953 else if (Ustrcmp(argrest, "rw") == 0)
1955 test_rewrite_arg = i + 1;
1959 /* -bS: Read SMTP commands on standard input, but produce no replies -
1960 all errors are reported by sending messages. */
1962 else if (Ustrcmp(argrest, "S") == 0)
1963 smtp_input = smtp_batched_input = receiving_message = TRUE;
1965 /* -bs: Read SMTP commands on standard input and produce SMTP replies
1966 on standard output. */
1968 else if (Ustrcmp(argrest, "s") == 0) smtp_input = receiving_message = TRUE;
1970 /* -bt: address testing mode */
1972 else if (Ustrcmp(argrest, "t") == 0)
1973 address_test_mode = checking = log_testing_mode = TRUE;
1975 /* -bv: verify addresses */
1977 else if (Ustrcmp(argrest, "v") == 0)
1978 verify_address_mode = checking = log_testing_mode = TRUE;
1980 /* -bvs: verify sender addresses */
1982 else if (Ustrcmp(argrest, "vs") == 0)
1984 verify_address_mode = checking = log_testing_mode = TRUE;
1985 verify_as_sender = TRUE;
1988 /* -bV: Print version string and support details */
1990 else if (Ustrcmp(argrest, "V") == 0)
1992 printf("Exim version %s #%s built %s\n", version_string,
1993 version_cnumber, version_date);
1994 printf("%s\n", CS version_copyright);
1995 version_printed = TRUE;
1996 show_whats_supported(stdout);
2003 /* -C: change configuration file list; ignore if it isn't really
2004 a change! Enforce a prefix check if required. */
2009 if(++i < argc) argrest = argv[i]; else
2010 { badarg = TRUE; break; }
2012 if (Ustrcmp(config_main_filelist, argrest) != 0)
2014 #ifdef ALT_CONFIG_PREFIX
2016 int len = Ustrlen(ALT_CONFIG_PREFIX);
2017 uschar *list = argrest;
2019 while((filename = string_nextinlist(&list, &sep, big_buffer,
2020 big_buffer_size)) != NULL)
2022 if ((Ustrlen(filename) < len ||
2023 Ustrncmp(filename, ALT_CONFIG_PREFIX, len) != 0 ||
2024 Ustrstr(filename, "/../") != NULL) &&
2025 (Ustrcmp(filename, "/dev/null") != 0 || real_uid != root_uid))
2027 fprintf(stderr, "-C Permission denied\n");
2032 if (real_uid != root_uid)
2034 #ifdef TRUSTED_CONFIG_LIST
2036 if (real_uid != exim_uid
2037 #ifdef CONFIGURE_OWNER
2038 && real_uid != config_uid
2041 trusted_config = FALSE;
2044 FILE *trust_list = Ufopen(TRUSTED_CONFIG_LIST, "rb");
2047 struct stat statbuf;
2049 if (fstat(fileno(trust_list), &statbuf) != 0 ||
2050 (statbuf.st_uid != root_uid /* owner not root */
2051 #ifdef CONFIGURE_OWNER
2052 && statbuf.st_uid != config_uid /* owner not the special one */
2055 (statbuf.st_gid != root_gid /* group not root */
2056 #ifdef CONFIGURE_GROUP
2057 && statbuf.st_gid != config_gid /* group not the special one */
2059 && (statbuf.st_mode & 020) != 0 /* group writeable */
2061 (statbuf.st_mode & 2) != 0) /* world writeable */
2063 trusted_config = FALSE;
2068 /* Well, the trust list at least is up to scratch... */
2069 void *reset_point = store_get(0);
2070 uschar *trusted_configs[32];
2074 while (Ufgets(big_buffer, big_buffer_size, trust_list))
2076 uschar *start = big_buffer, *nl;
2077 while (*start && isspace(*start))
2081 nl = Ustrchr(start, '\n');
2084 trusted_configs[nr_configs++] = string_copy(start);
2085 if (nr_configs == 32)
2093 uschar *list = argrest;
2095 while (trusted_config && (filename = string_nextinlist(&list,
2096 &sep, big_buffer, big_buffer_size)) != NULL)
2098 for (i=0; i < nr_configs; i++)
2100 if (Ustrcmp(filename, trusted_configs[i]) == 0)
2103 if (i == nr_configs)
2105 trusted_config = FALSE;
2109 store_reset(reset_point);
2113 /* No valid prefixes found in trust_list file. */
2114 trusted_config = FALSE;
2120 /* Could not open trust_list file. */
2121 trusted_config = FALSE;
2125 /* Not root; don't trust config */
2126 trusted_config = FALSE;
2130 config_main_filelist = argrest;
2131 config_changed = TRUE;
2136 /* -D: set up a macro definition */
2139 #ifdef DISABLE_D_OPTION
2140 fprintf(stderr, "exim: -D is not available in this Exim binary\n");
2145 macro_item *mlast = NULL;
2148 uschar *s = argrest;
2150 while (isspace(*s)) s++;
2152 if (*s < 'A' || *s > 'Z')
2154 fprintf(stderr, "exim: macro name set by -D must start with "
2155 "an upper case letter\n");
2159 while (isalnum(*s) || *s == '_')
2161 if (ptr < sizeof(name)-1) name[ptr++] = *s;
2165 if (ptr == 0) { badarg = TRUE; break; }
2166 while (isspace(*s)) s++;
2169 if (*s++ != '=') { badarg = TRUE; break; }
2170 while (isspace(*s)) s++;
2173 for (m = macros; m != NULL; m = m->next)
2175 if (Ustrcmp(m->name, name) == 0)
2177 fprintf(stderr, "exim: duplicated -D in command line\n");
2183 m = store_get(sizeof(macro_item) + Ustrlen(name));
2185 m->command_line = TRUE;
2186 if (mlast == NULL) macros = m; else mlast->next = m;
2187 Ustrcpy(m->name, name);
2188 m->replacement = string_copy(s);
2190 if (clmacro_count >= MAX_CLMACROS)
2192 fprintf(stderr, "exim: too many -D options on command line\n");
2195 clmacros[clmacro_count++] = string_sprintf("-D%s=%s", m->name,
2201 /* -d: Set debug level (see also -v below) or set the drop_cr option.
2202 The latter is now a no-op, retained for compatibility only. If -dd is used,
2203 debugging subprocesses of the daemon is disabled. */
2206 if (Ustrcmp(argrest, "ropcr") == 0)
2208 /* drop_cr = TRUE; */
2211 /* Use an intermediate variable so that we don't set debugging while
2212 decoding the debugging bits. */
2216 unsigned int selector = D_default;
2219 if (*argrest == 'd')
2221 debug_daemon = TRUE;
2225 decode_bits(&selector, NULL, D_memory, 0, argrest, debug_options,
2226 debug_options_count, US"debug", 0);
2227 debug_selector = selector;
2232 /* -E: This is a local error message. This option is not intended for
2233 external use at all, but is not restricted to trusted callers because it
2234 does no harm (just suppresses certain error messages) and if Exim is run
2235 not setuid root it won't always be trusted when it generates error
2236 messages using this option. If there is a message id following -E, point
2237 message_reference at it, for logging. */
2240 local_error_message = TRUE;
2241 if (mac_ismsgid(argrest)) message_reference = argrest;
2245 /* -ex: The vacation program calls sendmail with the undocumented "-eq"
2246 option, so it looks as if historically the -oex options are also callable
2247 without the leading -o. So we have to accept them. Before the switch,
2248 anything starting -oe has been converted to -e. Exim does not support all
2249 of the sendmail error options. */
2252 if (Ustrcmp(argrest, "e") == 0)
2254 arg_error_handling = ERRORS_SENDER;
2255 errors_sender_rc = EXIT_SUCCESS;
2257 else if (Ustrcmp(argrest, "m") == 0) arg_error_handling = ERRORS_SENDER;
2258 else if (Ustrcmp(argrest, "p") == 0) arg_error_handling = ERRORS_STDERR;
2259 else if (Ustrcmp(argrest, "q") == 0) arg_error_handling = ERRORS_STDERR;
2260 else if (Ustrcmp(argrest, "w") == 0) arg_error_handling = ERRORS_SENDER;
2265 /* -F: Set sender's full name, used instead of the gecos entry from
2266 the password file. Since users can usually alter their gecos entries,
2267 there's no security involved in using this instead. The data can follow
2268 the -F or be in the next argument. */
2273 if(++i < argc) argrest = argv[i]; else
2274 { badarg = TRUE; break; }
2276 originator_name = argrest;
2277 sender_name_forced = TRUE;
2281 /* -f: Set sender's address - this value is only actually used if Exim is
2282 run by a trusted user, or if untrusted_set_sender is set and matches the
2283 address, except that the null address can always be set by any user. The
2284 test for this happens later, when the value given here is ignored when not
2285 permitted. For an untrusted user, the actual sender is still put in Sender:
2286 if it doesn't match the From: header (unless no_local_from_check is set).
2287 The data can follow the -f or be in the next argument. The -r switch is an
2288 obsolete form of -f but since there appear to be programs out there that
2289 use anything that sendmail has ever supported, better accept it - the
2290 synonymizing is done before the switch above.
2292 At this stage, we must allow domain literal addresses, because we don't
2293 know what the setting of allow_domain_literals is yet. Ditto for trailing
2294 dots and strip_trailing_dot. */
2302 if (i+1 < argc) argrest = argv[++i]; else
2303 { badarg = TRUE; break; }
2307 sender_address = string_sprintf(""); /* Ensure writeable memory */
2311 uschar *temp = argrest + Ustrlen(argrest) - 1;
2312 while (temp >= argrest && isspace(*temp)) temp--;
2313 if (temp >= argrest && *temp == '.') f_end_dot = TRUE;
2314 allow_domain_literals = TRUE;
2315 strip_trailing_dot = TRUE;
2316 sender_address = parse_extract_address(argrest, &errmess, &start, &end,
2317 &sender_address_domain, TRUE);
2318 allow_domain_literals = FALSE;
2319 strip_trailing_dot = FALSE;
2320 if (sender_address == NULL)
2322 fprintf(stderr, "exim: bad -f address \"%s\": %s\n", argrest, errmess);
2323 return EXIT_FAILURE;
2326 sender_address_forced = TRUE;
2330 /* This is some Sendmail thing which can be ignored */
2335 /* -h: Set the hop count for an incoming message. Exim does not currently
2336 support this; it always computes it by counting the Received: headers.
2337 To put it in will require a change to the spool header file format. */
2342 if(++i < argc) argrest = argv[i]; else
2343 { badarg = TRUE; break; }
2345 if (!isdigit(*argrest)) badarg = TRUE;
2349 /* -i: Set flag so dot doesn't end non-SMTP input (same as -oi, seems
2350 not to be documented for sendmail but mailx (at least) uses it) */
2353 if (*argrest == 0) dot_ends = FALSE; else badarg = TRUE;
2358 receiving_message = FALSE;
2360 /* -MC: continue delivery of another message via an existing open
2361 file descriptor. This option is used for an internal call by the
2362 smtp transport when there is a pending message waiting to go to an
2363 address to which it has got a connection. Five subsequent arguments are
2364 required: transport name, host name, IP address, sequence number, and
2365 message_id. Transports may decline to create new processes if the sequence
2366 number gets too big. The channel is stdin. This (-MC) must be the last
2367 argument. There's a subsequent check that the real-uid is privileged.
2369 If we are running in the test harness. delay for a bit, to let the process
2370 that set this one up complete. This makes for repeatability of the logging,
2373 if (Ustrcmp(argrest, "C") == 0)
2375 union sockaddr_46 interface_sock;
2376 EXIM_SOCKLEN_T size = sizeof(interface_sock);
2380 fprintf(stderr, "exim: too many or too few arguments after -MC\n");
2381 return EXIT_FAILURE;
2384 if (msg_action_arg >= 0)
2386 fprintf(stderr, "exim: incompatible arguments\n");
2387 return EXIT_FAILURE;
2390 continue_transport = argv[++i];
2391 continue_hostname = argv[++i];
2392 continue_host_address = argv[++i];
2393 continue_sequence = Uatoi(argv[++i]);
2394 msg_action = MSG_DELIVER;
2395 msg_action_arg = ++i;
2396 forced_delivery = TRUE;
2397 queue_run_pid = passed_qr_pid;
2398 queue_run_pipe = passed_qr_pipe;
2400 if (!mac_ismsgid(argv[i]))
2402 fprintf(stderr, "exim: malformed message id %s after -MC option\n",
2404 return EXIT_FAILURE;
2407 /* Set up $sending_ip_address and $sending_port */
2409 if (getsockname(fileno(stdin), (struct sockaddr *)(&interface_sock),
2411 sending_ip_address = host_ntoa(-1, &interface_sock, NULL,
2415 fprintf(stderr, "exim: getsockname() failed after -MC option: %s\n",
2417 return EXIT_FAILURE;
2420 if (running_in_test_harness) millisleep(500);
2424 /* -MCA: set the smtp_authenticated flag; this is useful only when it
2425 precedes -MC (see above). The flag indicates that the host to which
2426 Exim is connected has accepted an AUTH sequence. */
2428 else if (Ustrcmp(argrest, "CA") == 0)
2430 smtp_authenticated = TRUE;
2434 /* -MCP: set the smtp_use_pipelining flag; this is useful only when
2435 it preceded -MC (see above) */
2437 else if (Ustrcmp(argrest, "CP") == 0)
2439 smtp_use_pipelining = TRUE;
2443 /* -MCQ: pass on the pid of the queue-running process that started
2444 this chain of deliveries and the fd of its synchronizing pipe; this
2445 is useful only when it precedes -MC (see above) */
2447 else if (Ustrcmp(argrest, "CQ") == 0)
2449 if(++i < argc) passed_qr_pid = (pid_t)(Uatol(argv[i]));
2451 if(++i < argc) passed_qr_pipe = (int)(Uatol(argv[i]));
2456 /* -MCS: set the smtp_use_size flag; this is useful only when it
2457 precedes -MC (see above) */
2459 else if (Ustrcmp(argrest, "CS") == 0)
2461 smtp_use_size = TRUE;
2465 /* -MCT: set the tls_offered flag; this is useful only when it
2466 precedes -MC (see above). The flag indicates that the host to which
2467 Exim is connected has offered TLS support. */
2470 else if (Ustrcmp(argrest, "CT") == 0)
2477 /* -M[x]: various operations on the following list of message ids:
2478 -M deliver the messages, ignoring next retry times and thawing
2479 -Mc deliver the messages, checking next retry times, no thawing
2480 -Mf freeze the messages
2481 -Mg give up on the messages
2482 -Mt thaw the messages
2483 -Mrm remove the messages
2484 In the above cases, this must be the last option. There are also the
2485 following options which are followed by a single message id, and which
2486 act on that message. Some of them use the "recipient" addresses as well.
2487 -Mar add recipient(s)
2488 -Mmad mark all recipients delivered
2489 -Mmd mark recipients(s) delivered
2491 -Mset load a message for use with -be
2493 -Mvc show copy (of whole message, in RFC 2822 format)
2498 else if (*argrest == 0)
2500 msg_action = MSG_DELIVER;
2501 forced_delivery = deliver_force_thaw = TRUE;
2503 else if (Ustrcmp(argrest, "ar") == 0)
2505 msg_action = MSG_ADD_RECIPIENT;
2506 one_msg_action = TRUE;
2508 else if (Ustrcmp(argrest, "c") == 0) msg_action = MSG_DELIVER;
2509 else if (Ustrcmp(argrest, "es") == 0)
2511 msg_action = MSG_EDIT_SENDER;
2512 one_msg_action = TRUE;
2514 else if (Ustrcmp(argrest, "f") == 0) msg_action = MSG_FREEZE;
2515 else if (Ustrcmp(argrest, "g") == 0)
2517 msg_action = MSG_DELIVER;
2518 deliver_give_up = TRUE;
2520 else if (Ustrcmp(argrest, "mad") == 0)
2522 msg_action = MSG_MARK_ALL_DELIVERED;
2524 else if (Ustrcmp(argrest, "md") == 0)
2526 msg_action = MSG_MARK_DELIVERED;
2527 one_msg_action = TRUE;
2529 else if (Ustrcmp(argrest, "rm") == 0) msg_action = MSG_REMOVE;
2530 else if (Ustrcmp(argrest, "set") == 0)
2532 msg_action = MSG_LOAD;
2533 one_msg_action = TRUE;
2535 else if (Ustrcmp(argrest, "t") == 0) msg_action = MSG_THAW;
2536 else if (Ustrcmp(argrest, "vb") == 0)
2538 msg_action = MSG_SHOW_BODY;
2539 one_msg_action = TRUE;
2541 else if (Ustrcmp(argrest, "vc") == 0)
2543 msg_action = MSG_SHOW_COPY;
2544 one_msg_action = TRUE;
2546 else if (Ustrcmp(argrest, "vh") == 0)
2548 msg_action = MSG_SHOW_HEADER;
2549 one_msg_action = TRUE;
2551 else if (Ustrcmp(argrest, "vl") == 0)
2553 msg_action = MSG_SHOW_LOG;
2554 one_msg_action = TRUE;
2556 else { badarg = TRUE; break; }
2558 /* All the -Mxx options require at least one message id. */
2560 msg_action_arg = i + 1;
2561 if (msg_action_arg >= argc)
2563 fprintf(stderr, "exim: no message ids given after %s option\n", arg);
2564 return EXIT_FAILURE;
2567 /* Some require only message ids to follow */
2569 if (!one_msg_action)
2572 for (j = msg_action_arg; j < argc; j++) if (!mac_ismsgid(argv[j]))
2574 fprintf(stderr, "exim: malformed message id %s after %s option\n",
2576 return EXIT_FAILURE;
2578 goto END_ARG; /* Remaining args are ids */
2581 /* Others require only one message id, possibly followed by addresses,
2582 which will be handled as normal arguments. */
2586 if (!mac_ismsgid(argv[msg_action_arg]))
2588 fprintf(stderr, "exim: malformed message id %s after %s option\n",
2589 argv[msg_action_arg], arg);
2590 return EXIT_FAILURE;
2597 /* Some programs seem to call the -om option without the leading o;
2598 for sendmail it askes for "me too". Exim always does this. */
2601 if (*argrest != 0) badarg = TRUE;
2605 /* -N: don't do delivery - a debugging option that stops transports doing
2606 their thing. It implies debugging at the D_v level. */
2611 dont_deliver = TRUE;
2612 debug_selector |= D_v;
2613 debug_file = stderr;
2619 /* -n: This means "don't alias" in sendmail, apparently. Just ignore
2625 /* -O: Just ignore it. In sendmail, apparently -O option=value means set
2626 option to the specified value. This form uses long names. We need to handle
2627 -O option=value and -Ooption=value. */
2634 fprintf(stderr, "exim: string expected after -O\n");
2642 /* -oA: Set an argument for the bi command (sendmail's "alternate alias
2645 if (*argrest == 'A')
2647 alias_arg = argrest + 1;
2648 if (alias_arg[0] == 0)
2650 if (i+1 < argc) alias_arg = argv[++i]; else
2652 fprintf(stderr, "exim: string expected after -oA\n");
2658 /* -oB: Set a connection message max value for remote deliveries */
2660 else if (*argrest == 'B')
2662 uschar *p = argrest + 1;
2665 if (i+1 < argc && isdigit((argv[i+1][0]))) p = argv[++i]; else
2667 connection_max_messages = 1;
2676 fprintf(stderr, "exim: number expected after -oB\n");
2679 connection_max_messages = Uatoi(p);
2683 /* -odb: background delivery */
2685 else if (Ustrcmp(argrest, "db") == 0)
2687 synchronous_delivery = FALSE;
2688 arg_queue_only = FALSE;
2689 queue_only_set = TRUE;
2692 /* -odf: foreground delivery (smail-compatible option); same effect as
2693 -odi: interactive (synchronous) delivery (sendmail-compatible option)
2696 else if (Ustrcmp(argrest, "df") == 0 || Ustrcmp(argrest, "di") == 0)
2698 synchronous_delivery = TRUE;
2699 arg_queue_only = FALSE;
2700 queue_only_set = TRUE;
2703 /* -odq: queue only */
2705 else if (Ustrcmp(argrest, "dq") == 0)
2707 synchronous_delivery = FALSE;
2708 arg_queue_only = TRUE;
2709 queue_only_set = TRUE;
2712 /* -odqs: queue SMTP only - do local deliveries and remote routing,
2713 but no remote delivery */
2715 else if (Ustrcmp(argrest, "dqs") == 0)
2718 arg_queue_only = FALSE;
2719 queue_only_set = TRUE;
2722 /* -oex: Sendmail error flags. As these are also accepted without the
2723 leading -o prefix, for compatibility with vacation and other callers,
2724 they are handled with -e above. */
2726 /* -oi: Set flag so dot doesn't end non-SMTP input (same as -i)
2727 -oitrue: Another sendmail syntax for the same */
2729 else if (Ustrcmp(argrest, "i") == 0 ||
2730 Ustrcmp(argrest, "itrue") == 0)
2733 /* -oM*: Set various characteristics for an incoming message; actually
2734 acted on for trusted callers only. */
2736 else if (*argrest == 'M')
2740 fprintf(stderr, "exim: data expected after -o%s\n", argrest);
2744 /* -oMa: Set sender host address */
2746 if (Ustrcmp(argrest, "Ma") == 0) sender_host_address = argv[++i];
2748 /* -oMaa: Set authenticator name */
2750 else if (Ustrcmp(argrest, "Maa") == 0)
2751 sender_host_authenticated = argv[++i];
2753 /* -oMas: setting authenticated sender */
2755 else if (Ustrcmp(argrest, "Mas") == 0) authenticated_sender = argv[++i];
2757 /* -oMai: setting authenticated id */
2759 else if (Ustrcmp(argrest, "Mai") == 0) authenticated_id = argv[++i];
2761 /* -oMi: Set incoming interface address */
2763 else if (Ustrcmp(argrest, "Mi") == 0) interface_address = argv[++i];
2765 /* -oMr: Received protocol */
2767 else if (Ustrcmp(argrest, "Mr") == 0) received_protocol = argv[++i];
2769 /* -oMs: Set sender host name */
2771 else if (Ustrcmp(argrest, "Ms") == 0) sender_host_name = argv[++i];
2773 /* -oMt: Set sender ident */
2775 else if (Ustrcmp(argrest, "Mt") == 0)
2777 sender_ident_set = TRUE;
2778 sender_ident = argv[++i];
2781 /* Else a bad argument */
2790 /* -om: Me-too flag for aliases. Exim always does this. Some programs
2791 seem to call this as -m (undocumented), so that is also accepted (see
2794 else if (Ustrcmp(argrest, "m") == 0) {}
2796 /* -oo: An ancient flag for old-style addresses which still seems to
2797 crop up in some calls (see in SCO). */
2799 else if (Ustrcmp(argrest, "o") == 0) {}
2801 /* -oP <name>: set pid file path for daemon */
2803 else if (Ustrcmp(argrest, "P") == 0)
2804 override_pid_file_path = argv[++i];
2806 /* -or <n>: set timeout for non-SMTP acceptance
2807 -os <n>: set timeout for SMTP acceptance */
2809 else if (*argrest == 'r' || *argrest == 's')
2811 int *tp = (*argrest == 'r')?
2812 &arg_receive_timeout : &arg_smtp_receive_timeout;
2813 if (argrest[1] == 0)
2815 if (i+1 < argc) *tp= readconf_readtime(argv[++i], 0, FALSE);
2817 else *tp = readconf_readtime(argrest + 1, 0, FALSE);
2820 fprintf(stderr, "exim: bad time value %s: abandoned\n", argv[i]);
2825 /* -oX <list>: Override local_interfaces and/or default daemon ports */
2827 else if (Ustrcmp(argrest, "X") == 0)
2828 override_local_interfaces = argv[++i];
2830 /* Unknown -o argument */
2836 /* -ps: force Perl startup; -pd force delayed Perl startup */
2840 if (*argrest == 's' && argrest[1] == 0)
2842 perl_start_option = 1;
2845 if (*argrest == 'd' && argrest[1] == 0)
2847 perl_start_option = -1;
2852 /* -panythingelse is taken as the Sendmail-compatible argument -prval:sval,
2853 which sets the host protocol and host name */
2857 if (i+1 < argc) argrest = argv[++i]; else
2858 { badarg = TRUE; break; }
2863 uschar *hn = Ustrchr(argrest, ':');
2866 received_protocol = argrest;
2870 received_protocol = string_copyn(argrest, hn - argrest);
2871 sender_host_name = hn + 1;
2878 receiving_message = FALSE;
2879 if (queue_interval >= 0)
2881 fprintf(stderr, "exim: -q specified more than once\n");
2885 /* -qq...: Do queue runs in a 2-stage manner */
2887 if (*argrest == 'q')
2889 queue_2stage = TRUE;
2893 /* -qi...: Do only first (initial) deliveries */
2895 if (*argrest == 'i')
2897 queue_run_first_delivery = TRUE;
2901 /* -qf...: Run the queue, forcing deliveries
2902 -qff..: Ditto, forcing thawing as well */
2904 if (*argrest == 'f')
2906 queue_run_force = TRUE;
2907 if (*(++argrest) == 'f')
2909 deliver_force_thaw = TRUE;
2914 /* -q[f][f]l...: Run the queue only on local deliveries */
2916 if (*argrest == 'l')
2918 queue_run_local = TRUE;
2922 /* -q[f][f][l]: Run the queue, optionally forced, optionally local only,
2923 optionally starting from a given message id. */
2925 if (*argrest == 0 &&
2926 (i + 1 >= argc || argv[i+1][0] == '-' || mac_ismsgid(argv[i+1])))
2929 if (i+1 < argc && mac_ismsgid(argv[i+1]))
2930 start_queue_run_id = argv[++i];
2931 if (i+1 < argc && mac_ismsgid(argv[i+1]))
2932 stop_queue_run_id = argv[++i];
2935 /* -q[f][f][l]<n>: Run the queue at regular intervals, optionally forced,
2936 optionally local only. */
2941 queue_interval = readconf_readtime(argrest, 0, FALSE);
2943 queue_interval = readconf_readtime(argv[++i], 0, FALSE);
2944 if (queue_interval <= 0)
2946 fprintf(stderr, "exim: bad time value %s: abandoned\n", argv[i]);
2953 case 'R': /* Synonymous with -qR... */
2954 receiving_message = FALSE;
2956 /* -Rf: As -R (below) but force all deliveries,
2957 -Rff: Ditto, but also thaw all frozen messages,
2958 -Rr: String is regex
2959 -Rrf: Regex and force
2960 -Rrff: Regex and force and thaw
2962 in all cases provided there are no further characters in this
2968 for (i = 0; i < sizeof(rsopts)/sizeof(uschar *); i++)
2970 if (Ustrcmp(argrest, rsopts[i]) == 0)
2972 if (i != 2) queue_run_force = TRUE;
2973 if (i >= 2) deliver_selectstring_regex = TRUE;
2974 if (i == 1 || i == 4) deliver_force_thaw = TRUE;
2975 argrest += Ustrlen(rsopts[i]);
2980 /* -R: Set string to match in addresses for forced queue run to
2981 pick out particular messages. */
2985 if (i+1 < argc) deliver_selectstring = argv[++i]; else
2987 fprintf(stderr, "exim: string expected after -R\n");
2991 else deliver_selectstring = argrest;
2995 /* -r: an obsolete synonym for -f (see above) */
2998 /* -S: Like -R but works on sender. */
3000 case 'S': /* Synonymous with -qS... */
3001 receiving_message = FALSE;
3003 /* -Sf: As -S (below) but force all deliveries,
3004 -Sff: Ditto, but also thaw all frozen messages,
3005 -Sr: String is regex
3006 -Srf: Regex and force
3007 -Srff: Regex and force and thaw
3009 in all cases provided there are no further characters in this
3015 for (i = 0; i < sizeof(rsopts)/sizeof(uschar *); i++)
3017 if (Ustrcmp(argrest, rsopts[i]) == 0)
3019 if (i != 2) queue_run_force = TRUE;
3020 if (i >= 2) deliver_selectstring_sender_regex = TRUE;
3021 if (i == 1 || i == 4) deliver_force_thaw = TRUE;
3022 argrest += Ustrlen(rsopts[i]);
3027 /* -S: Set string to match in addresses for forced queue run to
3028 pick out particular messages. */
3032 if (i+1 < argc) deliver_selectstring_sender = argv[++i]; else
3034 fprintf(stderr, "exim: string expected after -S\n");
3038 else deliver_selectstring_sender = argrest;
3041 /* -Tqt is an option that is exclusively for use by the testing suite.
3042 It is not recognized in other circumstances. It allows for the setting up
3043 of explicit "queue times" so that various warning/retry things can be
3044 tested. Otherwise variability of clock ticks etc. cause problems. */
3047 if (running_in_test_harness && Ustrcmp(argrest, "qt") == 0)
3048 fudged_queue_times = argv[++i];
3053 /* -t: Set flag to extract recipients from body of message. */
3056 if (*argrest == 0) extract_recipients = TRUE;
3058 /* -ti: Set flag to extract recipients from body of message, and also
3059 specify that dot does not end the message. */
3061 else if (Ustrcmp(argrest, "i") == 0)
3063 extract_recipients = TRUE;
3067 /* -tls-on-connect: don't wait for STARTTLS (for old clients) */
3070 else if (Ustrcmp(argrest, "ls-on-connect") == 0) tls_on_connect = TRUE;
3077 /* -U: This means "initial user submission" in sendmail, apparently. The
3078 doc claims that in future sendmail may refuse syntactically invalid
3079 messages instead of fixing them. For the moment, we just ignore it. */
3085 /* -v: verify things - this is a very low-level debugging */
3090 debug_selector |= D_v;
3091 debug_file = stderr;
3097 /* -x: AIX uses this to indicate some fancy 8-bit character stuff:
3099 The -x flag tells the sendmail command that mail from a local
3100 mail program has National Language Support (NLS) extended characters
3101 in the body of the mail item. The sendmail command can send mail with
3102 extended NLS characters across networks that normally corrupts these
3105 As Exim is 8-bit clean, it just ignores this flag. */
3108 if (*argrest != 0) badarg = TRUE;
3111 /* All other initial characters are errors */
3116 } /* End of high-level switch statement */
3118 /* Failed to recognize the option, or syntax error */
3122 fprintf(stderr, "exim abandoned: unknown, malformed, or incomplete "
3123 "option %s\n", arg);
3129 /* If -R or -S have been specified without -q, assume a single queue run. */
3131 if ((deliver_selectstring != NULL || deliver_selectstring_sender != NULL) &&
3132 queue_interval < 0) queue_interval = 0;
3136 /* If usage_wanted is set we call the usage function - which never returns */
3137 if (usage_wanted) exim_usage(called_as);
3139 /* Arguments have been processed. Check for incompatibilities. */
3141 (smtp_input || extract_recipients || recipients_arg < argc) &&
3142 (daemon_listen || queue_interval >= 0 || bi_option ||
3143 test_retry_arg >= 0 || test_rewrite_arg >= 0 ||
3144 filter_test != FTEST_NONE || (msg_action_arg > 0 && !one_msg_action))
3147 msg_action_arg > 0 &&
3148 (daemon_listen || queue_interval >= 0 || list_options ||
3149 (checking && msg_action != MSG_LOAD) ||
3150 bi_option || test_retry_arg >= 0 || test_rewrite_arg >= 0)
3153 (daemon_listen || queue_interval >= 0) &&
3154 (sender_address != NULL || list_options || list_queue || checking ||
3158 daemon_listen && queue_interval == 0
3162 (checking || smtp_input || extract_recipients ||
3163 filter_test != FTEST_NONE || bi_option)
3166 verify_address_mode &&
3167 (address_test_mode || smtp_input || extract_recipients ||
3168 filter_test != FTEST_NONE || bi_option)
3171 address_test_mode && (smtp_input || extract_recipients ||
3172 filter_test != FTEST_NONE || bi_option)
3175 smtp_input && (sender_address != NULL || filter_test != FTEST_NONE ||
3179 deliver_selectstring != NULL && queue_interval < 0
3182 msg_action == MSG_LOAD &&
3183 (!expansion_test || expansion_test_message != NULL)
3187 fprintf(stderr, "exim: incompatible command-line options or arguments\n");
3191 /* If debugging is set up, set the file and the file descriptor to pass on to
3192 child processes. It should, of course, be 2 for stderr. Also, force the daemon
3193 to run in the foreground. */
3195 if (debug_selector != 0)
3197 debug_file = stderr;
3198 debug_fd = fileno(debug_file);
3199 background_daemon = FALSE;
3200 if (running_in_test_harness) millisleep(100); /* lets caller finish */
3201 if (debug_selector != D_v) /* -v only doesn't show this */
3203 debug_printf("Exim version %s uid=%ld gid=%ld pid=%d D=%x\n",
3204 version_string, (long int)real_uid, (long int)real_gid, (int)getpid(),
3206 if (!version_printed)
3207 show_whats_supported(stderr);
3211 /* When started with root privilege, ensure that the limits on the number of
3212 open files and the number of processes (where that is accessible) are
3213 sufficiently large, or are unset, in case Exim has been called from an
3214 environment where the limits are screwed down. Not all OS have the ability to
3215 change some of these limits. */
3219 DEBUG(D_any) debug_print_ids(US"Exim has no root privilege:");
3225 #ifdef RLIMIT_NOFILE
3226 if (getrlimit(RLIMIT_NOFILE, &rlp) < 0)
3228 log_write(0, LOG_MAIN|LOG_PANIC, "getrlimit(RLIMIT_NOFILE) failed: %s",
3230 rlp.rlim_cur = rlp.rlim_max = 0;
3233 /* I originally chose 1000 as a nice big number that was unlikely to
3234 be exceeded. It turns out that some older OS have a fixed upper limit of
3237 if (rlp.rlim_cur < 1000)
3239 rlp.rlim_cur = rlp.rlim_max = 1000;
3240 if (setrlimit(RLIMIT_NOFILE, &rlp) < 0)
3242 rlp.rlim_cur = rlp.rlim_max = 256;
3243 if (setrlimit(RLIMIT_NOFILE, &rlp) < 0)
3244 log_write(0, LOG_MAIN|LOG_PANIC, "setrlimit(RLIMIT_NOFILE) failed: %s",
3251 if (getrlimit(RLIMIT_NPROC, &rlp) < 0)
3253 log_write(0, LOG_MAIN|LOG_PANIC, "getrlimit(RLIMIT_NPROC) failed: %s",
3255 rlp.rlim_cur = rlp.rlim_max = 0;
3258 #ifdef RLIM_INFINITY
3259 if (rlp.rlim_cur != RLIM_INFINITY && rlp.rlim_cur < 1000)
3261 rlp.rlim_cur = rlp.rlim_max = RLIM_INFINITY;
3263 if (rlp.rlim_cur < 1000)
3265 rlp.rlim_cur = rlp.rlim_max = 1000;
3267 if (setrlimit(RLIMIT_NPROC, &rlp) < 0)
3268 log_write(0, LOG_MAIN|LOG_PANIC, "setrlimit(RLIMIT_NPROC) failed: %s",
3274 /* Exim is normally entered as root (but some special configurations are
3275 possible that don't do this). However, it always spins off sub-processes that
3276 set their uid and gid as required for local delivery. We don't want to pass on
3277 any extra groups that root may belong to, so we want to get rid of them all at
3280 We need to obey setgroups() at this stage, before possibly giving up root
3281 privilege for a changed configuration file, but later on we might need to
3282 check on the additional groups for the admin user privilege - can't do that
3283 till after reading the config, which might specify the exim gid. Therefore,
3284 save the group list here first. */
3286 group_count = getgroups(NGROUPS_MAX, group_list);
3287 if (group_count < 0)
3289 fprintf(stderr, "exim: getgroups() failed: %s\n", strerror(errno));
3293 /* There is a fundamental difference in some BSD systems in the matter of
3294 groups. FreeBSD and BSDI are known to be different; NetBSD and OpenBSD are
3295 known not to be different. On the "different" systems there is a single group
3296 list, and the first entry in it is the current group. On all other versions of
3297 Unix there is a supplementary group list, which is in *addition* to the current
3298 group. Consequently, to get rid of all extraneous groups on a "standard" system
3299 you pass over 0 groups to setgroups(), while on a "different" system you pass
3300 over a single group - the current group, which is always the first group in the
3301 list. Calling setgroups() with zero groups on a "different" system results in
3302 an error return. The following code should cope with both types of system.
3304 However, if this process isn't running as root, setgroups() can't be used
3305 since you have to be root to run it, even if throwing away groups. Not being
3306 root here happens only in some unusual configurations. We just ignore the
3309 if (setgroups(0, NULL) != 0)
3311 if (setgroups(1, group_list) != 0 && !unprivileged)
3313 fprintf(stderr, "exim: setgroups() failed: %s\n", strerror(errno));
3318 /* If the configuration file name has been altered by an argument on the
3319 command line (either a new file name or a macro definition) and the caller is
3320 not root, or if this is a filter testing run, remove any setuid privilege the
3321 program has and run as the underlying user.
3323 The exim user is locked out of this, which severely restricts the use of -C
3326 Otherwise, set the real ids to the effective values (should be root unless run
3327 from inetd, which it can either be root or the exim uid, if one is configured).
3329 There is a private mechanism for bypassing some of this, in order to make it
3330 possible to test lots of configurations automatically, without having either to
3331 recompile each time, or to patch in an actual configuration file name and other
3332 values (such as the path name). If running in the test harness, pretend that
3333 configuration file changes and macro definitions haven't happened. */
3336 (!trusted_config || /* Config changed, or */
3337 !macros_trusted()) && /* impermissible macros and */
3338 real_uid != root_uid && /* Not root, and */
3339 !running_in_test_harness /* Not fudged */
3341 expansion_test /* expansion testing */
3343 filter_test != FTEST_NONE) /* Filter testing */
3345 setgroups(group_count, group_list);
3346 exim_setugid(real_uid, real_gid, FALSE,
3347 US"-C, -D, -be or -bf forces real uid");
3348 removed_privilege = TRUE;
3350 /* In the normal case when Exim is called like this, stderr is available
3351 and should be used for any logging information because attempts to write
3352 to the log will usually fail. To arrange this, we unset really_exim. However,
3353 if no stderr is available there is no point - we might as well have a go
3354 at the log (if it fails, syslog will be written).
3356 Note that if the invoker is Exim, the logs remain available. Messing with
3357 this causes unlogged successful deliveries. */
3359 if ((log_stderr != NULL) && (real_uid != exim_uid))
3360 really_exim = FALSE;
3363 /* Privilege is to be retained for the moment. It may be dropped later,
3364 depending on the job that this Exim process has been asked to do. For now, set
3365 the real uid to the effective so that subsequent re-execs of Exim are done by a
3368 else exim_setugid(geteuid(), getegid(), FALSE, US"forcing real = effective");
3370 /* If testing a filter, open the file(s) now, before wasting time doing other
3371 setups and reading the message. */
3373 if ((filter_test & FTEST_SYSTEM) != 0)
3375 filter_sfd = Uopen(filter_test_sfile, O_RDONLY, 0);
3378 fprintf(stderr, "exim: failed to open %s: %s\n", filter_test_sfile,
3380 return EXIT_FAILURE;
3384 if ((filter_test & FTEST_USER) != 0)
3386 filter_ufd = Uopen(filter_test_ufile, O_RDONLY, 0);
3389 fprintf(stderr, "exim: failed to open %s: %s\n", filter_test_ufile,
3391 return EXIT_FAILURE;
3395 /* Read the main runtime configuration data; this gives up if there
3396 is a failure. It leaves the configuration file open so that the subsequent
3397 configuration data for delivery can be read if needed. */
3401 /* Handle the decoding of logging options. */
3403 decode_bits(&log_write_selector, &log_extra_selector, 0, 0,
3404 log_selector_string, log_options, log_options_count, US"log", 0);
3408 debug_printf("configuration file is %s\n", config_main_filename);
3409 debug_printf("log selectors = %08x %08x\n", log_write_selector,
3410 log_extra_selector);
3413 /* If domain literals are not allowed, check the sender address that was
3414 supplied with -f. Ditto for a stripped trailing dot. */
3416 if (sender_address != NULL)
3418 if (sender_address[sender_address_domain] == '[' && !allow_domain_literals)
3420 fprintf(stderr, "exim: bad -f address \"%s\": domain literals not "
3421 "allowed\n", sender_address);
3422 return EXIT_FAILURE;
3424 if (f_end_dot && !strip_trailing_dot)
3426 fprintf(stderr, "exim: bad -f address \"%s.\": domain is malformed "
3427 "(trailing dot not allowed)\n", sender_address);
3428 return EXIT_FAILURE;
3432 /* Paranoia check of maximum lengths of certain strings. There is a check
3433 on the length of the log file path in log.c, which will come into effect
3434 if there are any calls to write the log earlier than this. However, if we
3435 get this far but the string is very long, it is better to stop now than to
3436 carry on and (e.g.) receive a message and then have to collapse. The call to
3437 log_write() from here will cause the ultimate panic collapse if the complete
3438 file name exceeds the buffer length. */
3440 if (Ustrlen(log_file_path) > 200)
3441 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3442 "log_file_path is longer than 200 chars: aborting");
3444 if (Ustrlen(pid_file_path) > 200)
3445 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3446 "pid_file_path is longer than 200 chars: aborting");
3448 if (Ustrlen(spool_directory) > 200)
3449 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3450 "spool_directory is longer than 200 chars: aborting");
3452 /* Length check on the process name given to syslog for its TAG field,
3453 which is only permitted to be 32 characters or less. See RFC 3164. */
3455 if (Ustrlen(syslog_processname) > 32)
3456 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3457 "syslog_processname is longer than 32 chars: aborting");
3459 /* In some operating systems, the environment variable TMPDIR controls where
3460 temporary files are created; Exim doesn't use these (apart from when delivering
3461 to MBX mailboxes), but called libraries such as DBM libraries may require them.
3462 If TMPDIR is found in the environment, reset it to the value defined in the
3463 TMPDIR macro, if this macro is defined. */
3468 for (p = USS environ; *p != NULL; p++)
3470 if (Ustrncmp(*p, "TMPDIR=", 7) == 0 &&
3471 Ustrcmp(*p+7, TMPDIR) != 0)
3473 uschar *newp = malloc(Ustrlen(TMPDIR) + 8);
3474 sprintf(CS newp, "TMPDIR=%s", TMPDIR);
3476 DEBUG(D_any) debug_printf("reset TMPDIR=%s in environment\n", TMPDIR);
3482 /* Timezone handling. If timezone_string is "utc", set a flag to cause all
3483 timestamps to be in UTC (gmtime() is used instead of localtime()). Otherwise,
3484 we may need to get rid of a bogus timezone setting. This can arise when Exim is
3485 called by a user who has set the TZ variable. This then affects the timestamps
3486 in log files and in Received: headers, and any created Date: header lines. The
3487 required timezone is settable in the configuration file, so nothing can be done
3488 about this earlier - but hopefully nothing will normally be logged earlier than
3489 this. We have to make a new environment if TZ is wrong, but don't bother if
3490 timestamps_utc is set, because then all times are in UTC anyway. */
3492 if (timezone_string != NULL && strcmpic(timezone_string, US"UTC") == 0)
3494 timestamps_utc = TRUE;
3498 uschar *envtz = US getenv("TZ");
3499 if ((envtz == NULL && timezone_string != NULL) ||
3501 (timezone_string == NULL ||
3502 Ustrcmp(timezone_string, envtz) != 0)))
3504 uschar **p = USS environ;
3508 while (*p++ != NULL) count++;
3509 if (envtz == NULL) count++;
3510 newp = new = malloc(sizeof(uschar *) * (count + 1));
3511 for (p = USS environ; *p != NULL; p++)
3513 if (Ustrncmp(*p, "TZ=", 3) == 0) continue;
3516 if (timezone_string != NULL)
3518 *newp = malloc(Ustrlen(timezone_string) + 4);
3519 sprintf(CS *newp++, "TZ=%s", timezone_string);
3524 DEBUG(D_any) debug_printf("Reset TZ to %s: time is %s\n", timezone_string,
3525 tod_stamp(tod_log));
3529 /* Handle the case when we have removed the setuid privilege because of -C or
3530 -D. This means that the caller of Exim was not root.
3532 There is a problem if we were running as the Exim user. The sysadmin may
3533 expect this case to retain privilege because "the binary was called by the
3534 Exim user", but it hasn't, because either the -D option set macros, or the
3535 -C option set a non-trusted configuration file. There are two possibilities:
3537 (1) If deliver_drop_privilege is set, Exim is not going to re-exec in order
3538 to do message deliveries. Thus, the fact that it is running as a
3539 non-privileged user is plausible, and might be wanted in some special
3540 configurations. However, really_exim will have been set false when
3541 privilege was dropped, to stop Exim trying to write to its normal log
3542 files. Therefore, re-enable normal log processing, assuming the sysadmin
3543 has set up the log directory correctly.
3545 (2) If deliver_drop_privilege is not set, the configuration won't work as
3546 apparently intended, and so we log a panic message. In order to retain
3547 root for -C or -D, the caller must either be root or be invoking a
3548 trusted configuration file (when deliver_drop_privilege is false). */
3550 if (removed_privilege && (!trusted_config || macros != NULL) &&
3551 real_uid == exim_uid)
3553 if (deliver_drop_privilege)
3554 really_exim = TRUE; /* let logging work normally */
3556 log_write(0, LOG_MAIN|LOG_PANIC,
3557 "exim user lost privilege for using %s option",
3558 trusted_config? "-D" : "-C");
3561 /* Start up Perl interpreter if Perl support is configured and there is a
3562 perl_startup option, and the configuration or the command line specifies
3563 initializing starting. Note that the global variables are actually called
3564 opt_perl_xxx to avoid clashing with perl's namespace (perl_*). */
3567 if (perl_start_option != 0)
3568 opt_perl_at_start = (perl_start_option > 0);
3569 if (opt_perl_at_start && opt_perl_startup != NULL)
3572 DEBUG(D_any) debug_printf("Starting Perl interpreter\n");
3573 errstr = init_perl(opt_perl_startup);
3576 fprintf(stderr, "exim: error in perl_startup code: %s\n", errstr);
3577 return EXIT_FAILURE;
3579 opt_perl_started = TRUE;
3581 #endif /* EXIM_PERL */
3583 /* Initialise lookup_list
3584 If debugging, already called above via version reporting.
3585 This does mean that debugging causes the list to be initialised while root.
3586 This *should* be harmless -- all modules are loaded from a fixed dir and
3587 it's code that would, if not a module, be part of Exim already. */
3590 /* Log the arguments of the call if the configuration file said so. This is
3591 a debugging feature for finding out what arguments certain MUAs actually use.
3592 Don't attempt it if logging is disabled, or if listing variables or if
3593 verifying/testing addresses or expansions. */
3595 if (((debug_selector & D_any) != 0 || (log_extra_selector & LX_arguments) != 0)
3596 && really_exim && !list_options && !checking)
3599 uschar *p = big_buffer;
3601 (void)getcwd(CS p+4, big_buffer_size - 4);
3603 (void)string_format(p, big_buffer_size - (p - big_buffer), " %d args:", argc);
3605 for (i = 0; i < argc; i++)
3607 int len = Ustrlen(argv[i]);
3610 if (p + len + 8 >= big_buffer + big_buffer_size)
3613 log_write(0, LOG_MAIN, "%s", big_buffer);
3614 Ustrcpy(big_buffer, "...");
3617 printing = string_printing(argv[i]);
3618 if (printing[0] == 0) quote = US"\""; else
3620 uschar *pp = printing;
3622 while (*pp != 0) if (isspace(*pp++)) { quote = US"\""; break; }
3624 sprintf(CS p, " %s%.*s%s", quote, (int)(big_buffer_size -
3625 (p - big_buffer) - 4), printing, quote);
3629 if ((log_extra_selector & LX_arguments) != 0)
3630 log_write(0, LOG_MAIN, "%s", big_buffer);
3632 debug_printf("%s\n", big_buffer);
3635 /* Set the working directory to be the top-level spool directory. We don't rely
3636 on this in the code, which always uses fully qualified names, but it's useful
3637 for core dumps etc. Don't complain if it fails - the spool directory might not
3638 be generally accessible and calls with the -C option (and others) have lost
3639 privilege by now. Before the chdir, we try to ensure that the directory exists.
3642 if (Uchdir(spool_directory) != 0)
3644 (void)directory_make(spool_directory, US"", SPOOL_DIRECTORY_MODE, FALSE);
3645 (void)Uchdir(spool_directory);
3648 /* Handle calls with the -bi option. This is a sendmail option to rebuild *the*
3649 alias file. Exim doesn't have such a concept, but this call is screwed into
3650 Sun's YP makefiles. Handle this by calling a configured script, as the real
3651 user who called Exim. The -oA option can be used to pass an argument to the
3656 (void)fclose(config_file);
3657 if (bi_command != NULL)
3661 argv[i++] = bi_command;
3662 if (alias_arg != NULL) argv[i++] = alias_arg;
3665 setgroups(group_count, group_list);
3666 exim_setugid(real_uid, real_gid, FALSE, US"running bi_command");
3668 DEBUG(D_exec) debug_printf("exec %.256s %.256s\n", argv[0],
3669 (argv[1] == NULL)? US"" : argv[1]);
3671 execv(CS argv[0], (char *const *)argv);
3672 fprintf(stderr, "exim: exec failed: %s\n", strerror(errno));
3677 DEBUG(D_any) debug_printf("-bi used but bi_command not set; exiting\n");
3682 /* If an action on specific messages is requested, or if a daemon or queue
3683 runner is being started, we need to know if Exim was called by an admin user.
3684 This is the case if the real user is root or exim, or if the real group is
3685 exim, or if one of the supplementary groups is exim or a group listed in
3686 admin_groups. We don't fail all message actions immediately if not admin_user,
3687 since some actions can be performed by non-admin users. Instead, set admin_user
3688 for later interrogation. */
3690 if (real_uid == root_uid || real_uid == exim_uid || real_gid == exim_gid)
3695 for (i = 0; i < group_count; i++)
3697 if (group_list[i] == exim_gid) admin_user = TRUE;
3698 else if (admin_groups != NULL)
3700 for (j = 1; j <= (int)(admin_groups[0]); j++)
3701 if (admin_groups[j] == group_list[i])
3702 { admin_user = TRUE; break; }
3704 if (admin_user) break;
3708 /* Another group of privileged users are the trusted users. These are root,
3709 exim, and any caller matching trusted_users or trusted_groups. Trusted callers
3710 are permitted to specify sender_addresses with -f on the command line, and
3711 other message parameters as well. */
3713 if (real_uid == root_uid || real_uid == exim_uid)
3714 trusted_caller = TRUE;
3719 if (trusted_users != NULL)
3721 for (i = 1; i <= (int)(trusted_users[0]); i++)
3722 if (trusted_users[i] == real_uid)
3723 { trusted_caller = TRUE; break; }
3726 if (!trusted_caller && trusted_groups != NULL)
3728 for (i = 1; i <= (int)(trusted_groups[0]); i++)
3730 if (trusted_groups[i] == real_gid)
3731 trusted_caller = TRUE;
3732 else for (j = 0; j < group_count; j++)
3734 if (trusted_groups[i] == group_list[j])
3735 { trusted_caller = TRUE; break; }
3737 if (trusted_caller) break;
3742 if (trusted_caller) DEBUG(D_any) debug_printf("trusted user\n");
3743 if (admin_user) DEBUG(D_any) debug_printf("admin user\n");
3745 /* Only an admin user may start the daemon or force a queue run in the default
3746 configuration, but the queue run restriction can be relaxed. Only an admin
3747 user may request that a message be returned to its sender forthwith. Only an
3748 admin user may specify a debug level greater than D_v (because it might show
3749 passwords, etc. in lookup queries). Only an admin user may request a queue
3750 count. Only an admin user can use the test interface to scan for email
3751 (because Exim will be in the spool dir and able to look at mails). */
3755 BOOL debugset = (debug_selector & ~D_v) != 0;
3756 if (deliver_give_up || daemon_listen || malware_test_file ||
3757 (count_queue && queue_list_requires_admin) ||
3758 (list_queue && queue_list_requires_admin) ||
3759 (queue_interval >= 0 && prod_requires_admin) ||
3760 (debugset && !running_in_test_harness))
3762 fprintf(stderr, "exim:%s permission denied\n", debugset? " debugging" : "");
3767 /* If the real user is not root or the exim uid, the argument for passing
3768 in an open TCP/IP connection for another message is not permitted, nor is
3769 running with the -N option for any delivery action, unless this call to exim is
3770 one that supplied an input message, or we are using a patched exim for
3771 regression testing. */
3773 if (real_uid != root_uid && real_uid != exim_uid &&
3774 (continue_hostname != NULL ||
3776 (queue_interval >= 0 || daemon_listen || msg_action_arg > 0)
3777 )) && !running_in_test_harness)
3779 fprintf(stderr, "exim: Permission denied\n");
3780 return EXIT_FAILURE;
3783 /* If the caller is not trusted, certain arguments are ignored when running for
3784 real, but are permitted when checking things (-be, -bv, -bt, -bh, -bf, -bF).
3785 Note that authority for performing certain actions on messages is tested in the
3786 queue_action() function. */
3788 if (!trusted_caller && !checking && filter_test == FTEST_NONE)
3790 sender_host_name = sender_host_address = interface_address =
3791 sender_ident = received_protocol = NULL;
3792 sender_host_port = interface_port = 0;
3793 sender_host_authenticated = authenticated_sender = authenticated_id = NULL;
3796 /* If a sender host address is set, extract the optional port number off the
3797 end of it and check its syntax. Do the same thing for the interface address.
3798 Exim exits if the syntax is bad. */
3802 if (sender_host_address != NULL)
3803 sender_host_port = check_port(sender_host_address);
3804 if (interface_address != NULL)
3805 interface_port = check_port(interface_address);
3808 /* If an SMTP message is being received check to see if the standard input is a
3809 TCP/IP socket. If it is, we assume that Exim was called from inetd if the
3810 caller is root or the Exim user, or if the port is a privileged one. Otherwise,
3815 union sockaddr_46 inetd_sock;
3816 EXIM_SOCKLEN_T size = sizeof(inetd_sock);
3817 if (getpeername(0, (struct sockaddr *)(&inetd_sock), &size) == 0)
3819 int family = ((struct sockaddr *)(&inetd_sock))->sa_family;
3820 if (family == AF_INET || family == AF_INET6)
3822 union sockaddr_46 interface_sock;
3823 size = sizeof(interface_sock);
3825 if (getsockname(0, (struct sockaddr *)(&interface_sock), &size) == 0)
3826 interface_address = host_ntoa(-1, &interface_sock, NULL,
3829 if (host_is_tls_on_connect_port(interface_port)) tls_on_connect = TRUE;
3831 if (real_uid == root_uid || real_uid == exim_uid || interface_port < 1024)
3834 sender_host_address = host_ntoa(-1, (struct sockaddr *)(&inetd_sock),
3835 NULL, &sender_host_port);
3836 if (mua_wrapper) log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Input from "
3837 "inetd is not supported when mua_wrapper is set");
3842 "exim: Permission denied (unprivileged user, unprivileged port)\n");
3843 return EXIT_FAILURE;
3849 /* If the load average is going to be needed while receiving a message, get it
3850 now for those OS that require the first call to os_getloadavg() to be done as
3851 root. There will be further calls later for each message received. */
3853 #ifdef LOAD_AVG_NEEDS_ROOT
3854 if (receiving_message &&
3855 (queue_only_load >= 0 ||
3856 (is_inetd && smtp_load_reserve >= 0)
3859 load_average = OS_GETLOADAVG();
3863 /* The queue_only configuration option can be overridden by -odx on the command
3864 line, except that if queue_only_override is false, queue_only cannot be unset
3865 from the command line. */
3867 if (queue_only_set && (queue_only_override || arg_queue_only))
3868 queue_only = arg_queue_only;
3870 /* The receive_timeout and smtp_receive_timeout options can be overridden by
3873 if (arg_receive_timeout >= 0) receive_timeout = arg_receive_timeout;
3874 if (arg_smtp_receive_timeout >= 0)
3875 smtp_receive_timeout = arg_smtp_receive_timeout;
3877 /* If Exim was started with root privilege, unless we have already removed the
3878 root privilege above as a result of -C, -D, -be, -bf or -bF, remove it now
3879 except when starting the daemon or doing some kind of delivery or address
3880 testing (-bt). These are the only cases when root need to be retained. We run
3881 as exim for -bv and -bh. However, if deliver_drop_privilege is set, root is
3882 retained only for starting the daemon. We always do the initgroups() in this
3883 situation (controlled by the TRUE below), in order to be as close as possible
3884 to the state Exim usually runs in. */
3886 if (!unprivileged && /* originally had root AND */
3887 !removed_privilege && /* still got root AND */
3888 !daemon_listen && /* not starting the daemon */
3889 queue_interval <= 0 && /* (either kind of daemon) */
3891 deliver_drop_privilege || /* requested unprivileged */
3893 queue_interval < 0 && /* not running the queue */
3894 (msg_action_arg < 0 || /* and */
3895 msg_action != MSG_DELIVER) && /* not delivering and */
3896 (!checking || !address_test_mode) /* not address checking */
3900 exim_setugid(exim_uid, exim_gid, TRUE, US"privilege not needed");
3903 /* When we are retaining a privileged uid, we still change to the exim gid. */
3908 rv = setgid(exim_gid);
3909 /* Impact of failure is that some stuff might end up with an incorrect group.
3910 We track this for failures from root, since any attempt to change privilege
3911 by root should succeed and failures should be examined. For non-root,
3912 there's no security risk. For me, it's { exim -bV } on a just-built binary,
3913 no need to complain then. */
3916 if (!(unprivileged || removed_privilege))
3919 "exim: changing group failed: %s\n", strerror(errno));
3923 DEBUG(D_any) debug_printf("changing group to %ld failed: %s\n",
3924 (long int)exim_gid, strerror(errno));
3928 /* Handle a request to scan a file for malware */
3929 if (malware_test_file)
3931 #ifdef WITH_CONTENT_SCAN
3933 set_process_info("scanning file for malware");
3934 result = malware_in_file(malware_test_file);
3937 printf("No malware found.\n");
3942 printf("Malware lookup returned non-okay/fail: %d\n", result);
3946 printf("Malware found: %s\n", malware_name);
3948 printf("Malware scan detected malware of unknown name.\n");
3950 printf("Malware scanning not enabled at compile time.\n");
3955 /* Handle a request to list the delivery queue */
3959 set_process_info("listing the queue");
3960 queue_list(list_queue_option, argv + recipients_arg, argc - recipients_arg);
3964 /* Handle a request to count the delivery queue */
3968 set_process_info("counting the queue");
3973 /* Handle actions on specific messages, except for the force delivery and
3974 message load actions, which are done below. Some actions take a whole list of
3975 message ids, which are known to continue up to the end of the arguments. Others
3976 take a single message id and then operate on the recipients list. */
3978 if (msg_action_arg > 0 && msg_action != MSG_DELIVER && msg_action != MSG_LOAD)
3980 int yield = EXIT_SUCCESS;
3981 set_process_info("acting on specified messages");
3983 if (!one_msg_action)
3985 for (i = msg_action_arg; i < argc; i++)
3986 if (!queue_action(argv[i], msg_action, NULL, 0, 0))
3987 yield = EXIT_FAILURE;
3990 else if (!queue_action(argv[msg_action_arg], msg_action, argv, argc,
3991 recipients_arg)) yield = EXIT_FAILURE;
3995 /* All the modes below here require the remaining configuration sections
3996 to be read, except that we can skip over the ACL setting when delivering
3997 specific messages, or doing a queue run. (For various testing cases we could
3998 skip too, but as they are rare, it doesn't really matter.) The argument is TRUE
4001 readconf_rest(msg_action_arg > 0 || (queue_interval == 0 && !daemon_listen));
4003 /* The configuration data will have been read into POOL_PERM because we won't
4004 ever want to reset back past it. Change the current pool to POOL_MAIN. In fact,
4005 this is just a bit of pedantic tidiness. It wouldn't really matter if the
4006 configuration were read into POOL_MAIN, because we don't do any resets till
4007 later on. However, it seems right, and it does ensure that both pools get used.
4010 store_pool = POOL_MAIN;
4012 /* Handle the -brt option. This is for checking out retry configurations.
4013 The next three arguments are a domain name or a complete address, and
4014 optionally two error numbers. All it does is to call the function that
4015 scans the retry configuration data. */
4017 if (test_retry_arg >= 0)
4019 retry_config *yield;
4020 int basic_errno = 0;
4024 if (test_retry_arg >= argc)
4026 printf("-brt needs a domain or address argument\n");
4027 exim_exit(EXIT_FAILURE);
4029 s1 = argv[test_retry_arg++];
4032 /* If the first argument contains no @ and no . it might be a local user
4033 or it might be a single-component name. Treat as a domain. */
4035 if (Ustrchr(s1, '@') == NULL && Ustrchr(s1, '.') == NULL)
4037 printf("Warning: \"%s\" contains no '@' and no '.' characters. It is "
4038 "being \ntreated as a one-component domain, not as a local part.\n\n",
4042 /* There may be an optional second domain arg. */
4044 if (test_retry_arg < argc && Ustrchr(argv[test_retry_arg], '.') != NULL)
4045 s2 = argv[test_retry_arg++];
4047 /* The final arg is an error name */
4049 if (test_retry_arg < argc)
4051 uschar *ss = argv[test_retry_arg];
4053 readconf_retry_error(ss, ss + Ustrlen(ss), &basic_errno, &more_errno);
4056 printf("%s\n", CS error);
4057 return EXIT_FAILURE;
4060 /* For the {MAIL,RCPT,DATA}_4xx errors, a value of 255 means "any", and a
4061 code > 100 as an error is for matching codes to the decade. Turn them into
4062 a real error code, off the decade. */
4064 if (basic_errno == ERRNO_MAIL4XX ||
4065 basic_errno == ERRNO_RCPT4XX ||
4066 basic_errno == ERRNO_DATA4XX)
4068 int code = (more_errno >> 8) & 255;
4070 more_errno = (more_errno & 0xffff00ff) | (21 << 8);
4071 else if (code > 100)
4072 more_errno = (more_errno & 0xffff00ff) | ((code - 96) << 8);
4076 yield = retry_find_config(s1, s2, basic_errno, more_errno);
4077 if (yield == NULL) printf("No retry information found\n"); else
4080 more_errno = yield->more_errno;
4081 printf("Retry rule: %s ", yield->pattern);
4083 if (yield->basic_errno == ERRNO_EXIMQUOTA)
4085 printf("quota%s%s ",
4086 (more_errno > 0)? "_" : "",
4087 (more_errno > 0)? readconf_printtime(more_errno) : US"");
4089 else if (yield->basic_errno == ECONNREFUSED)
4091 printf("refused%s%s ",
4092 (more_errno > 0)? "_" : "",
4093 (more_errno == 'M')? "MX" :
4094 (more_errno == 'A')? "A" : "");
4096 else if (yield->basic_errno == ETIMEDOUT)
4099 if ((more_errno & RTEF_CTOUT) != 0) printf("_connect");
4101 if (more_errno != 0) printf("_%s",
4102 (more_errno == 'M')? "MX" : "A");
4105 else if (yield->basic_errno == ERRNO_AUTHFAIL)
4106 printf("auth_failed ");
4109 for (r = yield->rules; r != NULL; r = r->next)
4111 printf("%c,%s", r->rule, readconf_printtime(r->timeout)); /* Do not */
4112 printf(",%s", readconf_printtime(r->p1)); /* amalgamate */
4118 printf(",%d.", x/1000);
4132 exim_exit(EXIT_SUCCESS);
4135 /* Handle a request to list one or more configuration options */
4139 set_process_info("listing variables");
4140 if (recipients_arg >= argc) readconf_print(US"all", NULL);
4141 else for (i = recipients_arg; i < argc; i++)
4144 (Ustrcmp(argv[i], "router") == 0 ||
4145 Ustrcmp(argv[i], "transport") == 0 ||
4146 Ustrcmp(argv[i], "authenticator") == 0 ||
4147 Ustrcmp(argv[i], "macro") == 0))
4149 readconf_print(argv[i+1], argv[i]);
4152 else readconf_print(argv[i], NULL);
4154 exim_exit(EXIT_SUCCESS);
4158 /* Handle a request to deliver one or more messages that are already on the
4159 queue. Values of msg_action other than MSG_DELIVER and MSG_LOAD are dealt with
4160 above. MSG_LOAD is handled with -be (which is the only time it applies) below.
4162 Delivery of specific messages is typically used for a small number when
4163 prodding by hand (when the option forced_delivery will be set) or when
4164 re-execing to regain root privilege. Each message delivery must happen in a
4165 separate process, so we fork a process for each one, and run them sequentially
4166 so that debugging output doesn't get intertwined, and to avoid spawning too
4167 many processes if a long list is given. However, don't fork for the last one;
4168 this saves a process in the common case when Exim is called to deliver just one
4171 if (msg_action_arg > 0 && msg_action != MSG_LOAD)
4173 if (prod_requires_admin && !admin_user)
4175 fprintf(stderr, "exim: Permission denied\n");
4176 exim_exit(EXIT_FAILURE);
4178 set_process_info("delivering specified messages");
4179 if (deliver_give_up) forced_delivery = deliver_force_thaw = TRUE;
4180 for (i = msg_action_arg; i < argc; i++)
4185 (void)deliver_message(argv[i], forced_delivery, deliver_give_up);
4186 else if ((pid = fork()) == 0)
4188 (void)deliver_message(argv[i], forced_delivery, deliver_give_up);
4189 _exit(EXIT_SUCCESS);
4193 fprintf(stderr, "failed to fork delivery process for %s: %s\n", argv[i],
4195 exim_exit(EXIT_FAILURE);
4199 exim_exit(EXIT_SUCCESS);
4203 /* If only a single queue run is requested, without SMTP listening, we can just
4204 turn into a queue runner, with an optional starting message id. */
4206 if (queue_interval == 0 && !daemon_listen)
4208 DEBUG(D_queue_run) debug_printf("Single queue run%s%s%s%s\n",
4209 (start_queue_run_id == NULL)? US"" : US" starting at ",
4210 (start_queue_run_id == NULL)? US"" : start_queue_run_id,
4211 (stop_queue_run_id == NULL)? US"" : US" stopping at ",
4212 (stop_queue_run_id == NULL)? US"" : stop_queue_run_id);
4213 set_process_info("running the queue (single queue run)");
4214 queue_run(start_queue_run_id, stop_queue_run_id, FALSE);
4215 exim_exit(EXIT_SUCCESS);
4219 /* Find the login name of the real user running this process. This is always
4220 needed when receiving a message, because it is written into the spool file. It
4221 may also be used to construct a from: or a sender: header, and in this case we
4222 need the user's full name as well, so save a copy of it, checked for RFC822
4223 syntax and munged if necessary, if it hasn't previously been set by the -F
4224 argument. We may try to get the passwd entry more than once, in case NIS or
4225 other delays are in evidence. Save the home directory for use in filter testing
4230 if ((pw = getpwuid(real_uid)) != NULL)
4232 originator_login = string_copy(US pw->pw_name);
4233 originator_home = string_copy(US pw->pw_dir);
4235 /* If user name has not been set by -F, set it from the passwd entry
4236 unless -f has been used to set the sender address by a trusted user. */
4238 if (originator_name == NULL)
4240 if (sender_address == NULL ||
4241 (!trusted_caller && filter_test == FTEST_NONE))
4243 uschar *name = US pw->pw_gecos;
4244 uschar *amp = Ustrchr(name, '&');
4247 /* Most Unix specify that a '&' character in the gecos field is
4248 replaced by a copy of the login name, and some even specify that
4249 the first character should be upper cased, so that's what we do. */
4254 string_format(buffer, sizeof(buffer), "%.*s%n%s%s",
4255 amp - name, name, &loffset, originator_login, amp + 1);
4256 buffer[loffset] = toupper(buffer[loffset]);
4260 /* If a pattern for matching the gecos field was supplied, apply
4261 it and then expand the name string. */
4263 if (gecos_pattern != NULL && gecos_name != NULL)
4266 re = regex_must_compile(gecos_pattern, FALSE, TRUE); /* Use malloc */
4268 if (regex_match_and_setup(re, name, 0, -1))
4270 uschar *new_name = expand_string(gecos_name);
4272 if (new_name != NULL)
4274 DEBUG(D_receive) debug_printf("user name \"%s\" extracted from "
4275 "gecos field \"%s\"\n", new_name, name);
4278 else DEBUG(D_receive) debug_printf("failed to expand gecos_name string "
4279 "\"%s\": %s\n", gecos_name, expand_string_message);
4281 else DEBUG(D_receive) debug_printf("gecos_pattern \"%s\" did not match "
4282 "gecos field \"%s\"\n", gecos_pattern, name);
4283 store_free((void *)re);
4285 originator_name = string_copy(name);
4288 /* A trusted caller has used -f but not -F */
4290 else originator_name = US"";
4293 /* Break the retry loop */
4298 if (++i > finduser_retries) break;
4302 /* If we cannot get a user login, log the incident and give up, unless the
4303 configuration specifies something to use. When running in the test harness,
4304 any setting of unknown_login overrides the actual name. */
4306 if (originator_login == NULL || running_in_test_harness)
4308 if (unknown_login != NULL)
4310 originator_login = expand_string(unknown_login);
4311 if (originator_name == NULL && unknown_username != NULL)
4312 originator_name = expand_string(unknown_username);
4313 if (originator_name == NULL) originator_name = US"";
4315 if (originator_login == NULL)
4316 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Failed to get user name for uid %d",
4320 /* Ensure that the user name is in a suitable form for use as a "phrase" in an
4323 originator_name = string_copy(parse_fix_phrase(originator_name,
4324 Ustrlen(originator_name), big_buffer, big_buffer_size));
4326 /* If a message is created by this call of Exim, the uid/gid of its originator
4327 are those of the caller. These values are overridden if an existing message is
4328 read in from the spool. */
4330 originator_uid = real_uid;
4331 originator_gid = real_gid;
4333 DEBUG(D_receive) debug_printf("originator: uid=%d gid=%d login=%s name=%s\n",
4334 (int)originator_uid, (int)originator_gid, originator_login, originator_name);
4336 /* Run in daemon and/or queue-running mode. The function daemon_go() never
4337 returns. We leave this till here so that the originator_ fields are available
4338 for incoming messages via the daemon. The daemon cannot be run in mua_wrapper
4341 if (daemon_listen || queue_interval > 0)
4345 fprintf(stderr, "Daemon cannot be run when mua_wrapper is set\n");
4346 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Daemon cannot be run when "
4347 "mua_wrapper is set");
4352 /* If the sender ident has not been set (by a trusted caller) set it to
4353 the caller. This will get overwritten below for an inetd call. If a trusted
4354 caller has set it empty, unset it. */
4356 if (sender_ident == NULL) sender_ident = originator_login;
4357 else if (sender_ident[0] == 0) sender_ident = NULL;
4359 /* Handle the -brw option, which is for checking out rewriting rules. Cause log
4360 writes (on errors) to go to stderr instead. Can't do this earlier, as want the
4361 originator_* variables set. */
4363 if (test_rewrite_arg >= 0)
4365 really_exim = FALSE;
4366 if (test_rewrite_arg >= argc)
4368 printf("-brw needs an address argument\n");
4369 exim_exit(EXIT_FAILURE);
4371 rewrite_test(argv[test_rewrite_arg]);
4372 exim_exit(EXIT_SUCCESS);
4375 /* A locally-supplied message is considered to be coming from a local user
4376 unless a trusted caller supplies a sender address with -f, or is passing in the
4377 message via SMTP (inetd invocation or otherwise). */
4379 if ((sender_address == NULL && !smtp_input) ||
4380 (!trusted_caller && filter_test == FTEST_NONE))
4382 sender_local = TRUE;
4384 /* A trusted caller can supply authenticated_sender and authenticated_id
4385 via -oMas and -oMai and if so, they will already be set. Otherwise, force
4386 defaults except when host checking. */
4388 if (authenticated_sender == NULL && !host_checking)
4389 authenticated_sender = string_sprintf("%s@%s", originator_login,
4390 qualify_domain_sender);
4391 if (authenticated_id == NULL && !host_checking)
4392 authenticated_id = originator_login;
4395 /* Trusted callers are always permitted to specify the sender address.
4396 Untrusted callers may specify it if it matches untrusted_set_sender, or if what
4397 is specified is the empty address. However, if a trusted caller does not
4398 specify a sender address for SMTP input, we leave sender_address unset. This
4399 causes the MAIL commands to be honoured. */
4401 if ((!smtp_input && sender_address == NULL) ||
4402 !receive_check_set_sender(sender_address))
4404 /* Either the caller is not permitted to set a general sender, or this is
4405 non-SMTP input and the trusted caller has not set a sender. If there is no
4406 sender, or if a sender other than <> is set, override with the originator's
4407 login (which will get qualified below), except when checking things. */
4409 if (sender_address == NULL /* No sender_address set */
4411 (sender_address[0] != 0 && /* Non-empty sender address, AND */
4412 !checking && /* Not running tests, AND */
4413 filter_test == FTEST_NONE)) /* Not testing a filter */
4415 sender_address = originator_login;
4416 sender_address_forced = FALSE;
4417 sender_address_domain = 0;
4421 /* Remember whether an untrusted caller set the sender address */
4423 sender_set_untrusted = sender_address != originator_login && !trusted_caller;
4425 /* Ensure that the sender address is fully qualified unless it is the empty
4426 address, which indicates an error message, or doesn't exist (root caller, smtp
4427 interface, no -f argument). */
4429 if (sender_address != NULL && sender_address[0] != 0 &&
4430 sender_address_domain == 0)
4431 sender_address = string_sprintf("%s@%s", local_part_quote(sender_address),
4432 qualify_domain_sender);
4434 DEBUG(D_receive) debug_printf("sender address = %s\n", sender_address);
4436 /* Handle a request to verify a list of addresses, or test them for delivery.
4437 This must follow the setting of the sender address, since routers can be
4438 predicated upon the sender. If no arguments are given, read addresses from
4439 stdin. Set debug_level to at least D_v to get full output for address testing.
4442 if (verify_address_mode || address_test_mode)
4445 int flags = vopt_qualify;
4447 if (verify_address_mode)
4449 if (!verify_as_sender) flags |= vopt_is_recipient;
4450 DEBUG(D_verify) debug_print_ids(US"Verifying:");
4455 flags |= vopt_is_recipient;
4456 debug_selector |= D_v;
4457 debug_file = stderr;
4458 debug_fd = fileno(debug_file);
4459 DEBUG(D_verify) debug_print_ids(US"Address testing:");
4462 if (recipients_arg < argc)
4464 while (recipients_arg < argc)
4466 uschar *s = argv[recipients_arg++];
4469 BOOL finished = FALSE;
4470 uschar *ss = parse_find_address_end(s, FALSE);
4471 if (*ss == ',') *ss = 0; else finished = TRUE;
4472 test_address(s, flags, &exit_value);
4475 while (*(++s) != 0 && (*s == ',' || isspace(*s)));
4482 uschar *s = get_stdinput(NULL, NULL);
4483 if (s == NULL) break;
4484 test_address(s, flags, &exit_value);
4488 exim_exit(exit_value);
4491 /* Handle expansion checking. Either expand items on the command line, or read
4492 from stdin if there aren't any. If -Mset was specified, load the message so
4493 that its variables can be used, but restrict this facility to admin users.
4494 Otherwise, if -bem was used, read a message from stdin. */
4498 if (msg_action_arg > 0 && msg_action == MSG_LOAD)
4500 uschar spoolname[256]; /* Not big_buffer; used in spool_read_header() */
4503 fprintf(stderr, "exim: permission denied\n");
4506 message_id = argv[msg_action_arg];
4507 (void)string_format(spoolname, sizeof(spoolname), "%s-H", message_id);
4508 if (!spool_open_datafile(message_id))
4509 printf ("Failed to load message datafile %s\n", message_id);
4510 if (spool_read_header(spoolname, TRUE, FALSE) != spool_read_OK)
4511 printf ("Failed to load message %s\n", message_id);
4514 /* Read a test message from a file. We fudge it up to be on stdin, saving
4515 stdin itself for later reading of expansion strings. */
4517 else if (expansion_test_message != NULL)
4519 int save_stdin = dup(0);
4520 int fd = Uopen(expansion_test_message, O_RDONLY, 0);
4523 fprintf(stderr, "exim: failed to open %s: %s\n", expansion_test_message,
4525 return EXIT_FAILURE;
4528 filter_test = FTEST_USER; /* Fudge to make it look like filter test */
4529 message_ended = END_NOTENDED;
4530 read_message_body(receive_msg(extract_recipients));
4531 message_linecount += body_linecount;
4532 (void)dup2(save_stdin, 0);
4533 (void)close(save_stdin);
4534 clearerr(stdin); /* Required by Darwin */
4537 /* Allow $recipients for this testing */
4539 enable_dollar_recipients = TRUE;
4541 /* Expand command line items */
4543 if (recipients_arg < argc)
4545 while (recipients_arg < argc)
4547 uschar *s = argv[recipients_arg++];
4548 uschar *ss = expand_string(s);
4549 if (ss == NULL) printf ("Failed: %s\n", expand_string_message);
4550 else printf("%s\n", CS ss);
4558 char *(*fn_readline)(char *) = NULL;
4559 char *(*fn_addhist)(char *) = NULL;
4562 void *dlhandle = set_readline(&fn_readline, &fn_addhist);
4568 uschar *source = get_stdinput(fn_readline, fn_addhist);
4569 if (source == NULL) break;
4570 ss = expand_string(source);
4572 printf ("Failed: %s\n", expand_string_message);
4573 else printf("%s\n", CS ss);
4577 if (dlhandle != NULL) dlclose(dlhandle);
4581 /* The data file will be open after -Mset */
4583 if (deliver_datafile >= 0)
4585 (void)close(deliver_datafile);
4586 deliver_datafile = -1;
4589 exim_exit(EXIT_SUCCESS);
4593 /* The active host name is normally the primary host name, but it can be varied
4594 for hosts that want to play several parts at once. We need to ensure that it is
4595 set for host checking, and for receiving messages. */
4597 smtp_active_hostname = primary_hostname;
4598 if (raw_active_hostname != NULL)
4600 uschar *nah = expand_string(raw_active_hostname);
4603 if (!expand_string_forcedfail)
4604 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to expand \"%s\" "
4605 "(smtp_active_hostname): %s", raw_active_hostname,
4606 expand_string_message);
4608 else if (nah[0] != 0) smtp_active_hostname = nah;
4611 /* Handle host checking: this facility mocks up an incoming SMTP call from a
4612 given IP address so that the blocking and relay configuration can be tested.
4613 Unless a sender_ident was set by -oMt, we discard it (the default is the
4614 caller's login name). An RFC 1413 call is made only if we are running in the
4615 test harness and an incoming interface and both ports are specified, because
4616 there is no TCP/IP call to find the ident for. */
4623 if (!sender_ident_set)
4625 sender_ident = NULL;
4626 if (running_in_test_harness && sender_host_port != 0 &&
4627 interface_address != NULL && interface_port != 0)
4628 verify_get_ident(1413);
4631 /* In case the given address is a non-canonical IPv6 address, canonicize
4632 it. The code works for both IPv4 and IPv6, as it happens. */
4634 size = host_aton(sender_host_address, x);
4635 sender_host_address = store_get(48); /* large enough for full IPv6 */
4636 (void)host_nmtoa(size, x, -1, sender_host_address, ':');
4638 /* Now set up for testing */
4640 host_build_sender_fullhost();
4644 sender_local = FALSE;
4645 sender_host_notsocket = TRUE;
4646 debug_file = stderr;
4647 debug_fd = fileno(debug_file);
4648 fprintf(stdout, "\n**** SMTP testing session as if from host %s\n"
4649 "**** but without any ident (RFC 1413) callback.\n"
4650 "**** This is not for real!\n\n",
4651 sender_host_address);
4653 if (verify_check_host(&hosts_connection_nolog) == OK)
4654 log_write_selector &= ~L_smtp_connection;
4655 log_write(L_smtp_connection, LOG_MAIN, "%s", smtp_get_connection_info());
4657 /* NOTE: We do *not* call smtp_log_no_mail() if smtp_start_session() fails,
4658 because a log line has already been written for all its failure exists
4659 (usually "connection refused: <reason>") and writing another one is
4660 unnecessary clutter. */
4662 if (smtp_start_session())
4664 reset_point = store_get(0);
4667 store_reset(reset_point);
4668 if (smtp_setup_msg() <= 0) break;
4669 if (!receive_msg(FALSE)) break;
4673 exim_exit(EXIT_SUCCESS);
4677 /* Arrange for message reception if recipients or SMTP were specified;
4678 otherwise complain unless a version print (-bV) happened or this is a filter
4679 verification test. In the former case, show the configuration file name. */
4681 if (recipients_arg >= argc && !extract_recipients && !smtp_input)
4683 if (version_printed)
4685 printf("Configuration file is %s\n", config_main_filename);
4686 return EXIT_SUCCESS;
4689 if (filter_test == FTEST_NONE)
4690 exim_usage(called_as);
4694 /* If mua_wrapper is set, Exim is being used to turn an MUA that submits on the
4695 standard input into an MUA that submits to a smarthost over TCP/IP. We know
4696 that we are not called from inetd, because that is rejected above. The
4697 following configuration settings are forced here:
4699 (1) Synchronous delivery (-odi)
4700 (2) Errors to stderr (-oep == -oeq)
4701 (3) No parallel remote delivery
4702 (4) Unprivileged delivery
4704 We don't force overall queueing options because there are several of them;
4705 instead, queueing is avoided below when mua_wrapper is set. However, we do need
4706 to override any SMTP queueing. */
4710 synchronous_delivery = TRUE;
4711 arg_error_handling = ERRORS_STDERR;
4712 remote_max_parallel = 1;
4713 deliver_drop_privilege = TRUE;
4715 queue_smtp_domains = NULL;
4719 /* Prepare to accept one or more new messages on the standard input. When a
4720 message has been read, its id is returned in message_id[]. If doing immediate
4721 delivery, we fork a delivery process for each received message, except for the
4722 last one, where we can save a process switch.
4724 It is only in non-smtp mode that error_handling is allowed to be changed from
4725 its default of ERRORS_SENDER by argument. (Idle thought: are any of the
4726 sendmail error modes other than -oem ever actually used? Later: yes.) */
4728 if (!smtp_input) error_handling = arg_error_handling;
4730 /* If this is an inetd call, ensure that stderr is closed to prevent panic
4731 logging being sent down the socket and make an identd call to get the
4736 (void)fclose(stderr);
4737 exim_nullstd(); /* Re-open to /dev/null */
4738 verify_get_ident(IDENT_PORT);
4739 host_build_sender_fullhost();
4740 set_process_info("handling incoming connection from %s via inetd",
4744 /* If the sender host address has been set, build sender_fullhost if it hasn't
4745 already been done (which it will have been for inetd). This caters for the
4746 case when it is forced by -oMa. However, we must flag that it isn't a socket,
4747 so that the test for IP options is skipped for -bs input. */
4749 if (sender_host_address != NULL && sender_fullhost == NULL)
4751 host_build_sender_fullhost();
4752 set_process_info("handling incoming connection from %s via -oMa",
4754 sender_host_notsocket = TRUE;
4757 /* Otherwise, set the sender host as unknown except for inetd calls. This
4758 prevents host checking in the case of -bs not from inetd and also for -bS. */
4760 else if (!is_inetd) sender_host_unknown = TRUE;
4762 /* If stdout does not exist, then dup stdin to stdout. This can happen
4763 if exim is started from inetd. In this case fd 0 will be set to the socket,
4764 but fd 1 will not be set. This also happens for passed SMTP channels. */
4766 if (fstat(1, &statbuf) < 0) (void)dup2(0, 1);
4768 /* Set up the incoming protocol name and the state of the program. Root is
4769 allowed to force received protocol via the -oMr option above. If we have come
4770 via inetd, the process info has already been set up. We don't set
4771 received_protocol here for smtp input, as it varies according to
4772 batch/HELO/EHLO/AUTH/TLS. */
4776 if (!is_inetd) set_process_info("accepting a local %sSMTP message from <%s>",
4777 smtp_batched_input? "batched " : "",
4778 (sender_address!= NULL)? sender_address : originator_login);
4782 if (received_protocol == NULL)
4783 received_protocol = string_sprintf("local%s", called_as);
4784 set_process_info("accepting a local non-SMTP message from <%s>",
4788 /* Initialize the session_local_queue-only flag (this will be ignored if
4789 mua_wrapper is set) */
4792 session_local_queue_only = queue_only;
4794 /* For non-SMTP and for batched SMTP input, check that there is enough space on
4795 the spool if so configured. On failure, we must not attempt to send an error
4796 message! (For interactive SMTP, the check happens at MAIL FROM and an SMTP
4797 error code is given.) */
4799 if ((!smtp_input || smtp_batched_input) && !receive_check_fs(0))
4801 fprintf(stderr, "exim: insufficient disk space\n");
4802 return EXIT_FAILURE;
4805 /* If this is smtp input of any kind, real or batched, handle the start of the
4808 NOTE: We do *not* call smtp_log_no_mail() if smtp_start_session() fails,
4809 because a log line has already been written for all its failure exists
4810 (usually "connection refused: <reason>") and writing another one is
4811 unnecessary clutter. */
4817 if (verify_check_host(&hosts_connection_nolog) == OK)
4818 log_write_selector &= ~L_smtp_connection;
4819 log_write(L_smtp_connection, LOG_MAIN, "%s", smtp_get_connection_info());
4820 if (!smtp_start_session())
4823 exim_exit(EXIT_SUCCESS);
4827 /* Otherwise, set up the input size limit here. */
4831 thismessage_size_limit = expand_string_integer(message_size_limit, TRUE);
4832 if (expand_string_message != NULL)
4834 if (thismessage_size_limit == -1)
4835 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to expand "
4836 "message_size_limit: %s", expand_string_message);
4838 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "invalid value for "
4839 "message_size_limit: %s", expand_string_message);
4843 /* Loop for several messages when reading SMTP input. If we fork any child
4844 processes, we don't want to wait for them unless synchronous delivery is
4845 requested, so set SIGCHLD to SIG_IGN in that case. This is not necessarily the
4846 same as SIG_DFL, despite the fact that documentation often lists the default as
4847 "ignore". This is a confusing area. This is what I know:
4849 At least on some systems (e.g. Solaris), just setting SIG_IGN causes child
4850 processes that complete simply to go away without ever becoming defunct. You
4851 can't then wait for them - but we don't want to wait for them in the
4852 non-synchronous delivery case. However, this behaviour of SIG_IGN doesn't
4853 happen for all OS (e.g. *BSD is different).
4855 But that's not the end of the story. Some (many? all?) systems have the
4856 SA_NOCLDWAIT option for sigaction(). This requests the behaviour that Solaris
4857 has by default, so it seems that the difference is merely one of default
4858 (compare restarting vs non-restarting signals).
4860 To cover all cases, Exim sets SIG_IGN with SA_NOCLDWAIT here if it can. If not,
4861 it just sets SIG_IGN. To be on the safe side it also calls waitpid() at the end
4862 of the loop below. Paranoia rules.
4864 February 2003: That's *still* not the end of the story. There are now versions
4865 of Linux (where SIG_IGN does work) that are picky. If, having set SIG_IGN, a
4866 process then calls waitpid(), a grumble is written to the system log, because
4867 this is logically inconsistent. In other words, it doesn't like the paranoia.
4868 As a consequenc of this, the waitpid() below is now excluded if we are sure
4869 that SIG_IGN works. */
4871 if (!synchronous_delivery)
4874 struct sigaction act;
4875 act.sa_handler = SIG_IGN;
4876 sigemptyset(&(act.sa_mask));
4877 act.sa_flags = SA_NOCLDWAIT;
4878 sigaction(SIGCHLD, &act, NULL);
4880 signal(SIGCHLD, SIG_IGN);
4884 /* Save the current store pool point, for resetting at the start of
4885 each message, and save the real sender address, if any. */
4887 reset_point = store_get(0);
4888 real_sender_address = sender_address;
4890 /* Loop to receive messages; receive_msg() returns TRUE if there are more
4891 messages to be read (SMTP input), or FALSE otherwise (not SMTP, or SMTP channel
4896 store_reset(reset_point);
4899 /* Handle the SMTP case; call smtp_setup_mst() to deal with the initial SMTP
4900 input and build the recipients list, before calling receive_msg() to read the
4901 message proper. Whatever sender address is given in the SMTP transaction is
4902 often ignored for local senders - we use the actual sender, which is normally
4903 either the underlying user running this process or a -f argument provided by
4904 a trusted caller. It is saved in real_sender_address. The test for whether to
4905 accept the SMTP sender is encapsulated in receive_check_set_sender(). */
4910 if ((rc = smtp_setup_msg()) > 0)
4912 if (real_sender_address != NULL &&
4913 !receive_check_set_sender(sender_address))
4915 sender_address = raw_sender = real_sender_address;
4916 sender_address_unrewritten = NULL;
4919 /* For batched SMTP, we have to run the acl_not_smtp_start ACL, since it
4920 isn't really SMTP, so no other ACL will run until the acl_not_smtp one at
4921 the very end. The result of the ACL is ignored (as for other non-SMTP
4922 messages). It is run for its potential side effects. */
4924 if (smtp_batched_input && acl_not_smtp_start != NULL)
4926 uschar *user_msg, *log_msg;
4927 enable_dollar_recipients = TRUE;
4928 (void)acl_check(ACL_WHERE_NOTSMTP_START, NULL, acl_not_smtp_start,
4929 &user_msg, &log_msg);
4930 enable_dollar_recipients = FALSE;
4933 /* Now get the data for the message */
4935 more = receive_msg(extract_recipients);
4936 if (message_id[0] == 0)
4939 smtp_log_no_mail(); /* Log no mail if configured */
4940 exim_exit(EXIT_FAILURE);
4945 smtp_log_no_mail(); /* Log no mail if configured */
4946 exim_exit((rc == 0)? EXIT_SUCCESS : EXIT_FAILURE);
4950 /* In the non-SMTP case, we have all the information from the command
4951 line, but must process it in case it is in the more general RFC822
4952 format, and in any case, to detect syntax errors. Also, it appears that
4953 the use of comma-separated lists as single arguments is common, so we
4954 had better support them. */
4960 int count = argc - recipients_arg;
4961 uschar **list = argv + recipients_arg;
4963 /* These options cannot be changed dynamically for non-SMTP messages */
4965 active_local_sender_retain = local_sender_retain;
4966 active_local_from_check = local_from_check;
4968 /* Save before any rewriting */
4970 raw_sender = string_copy(sender_address);
4972 /* Loop for each argument */
4974 for (i = 0; i < count; i++)
4976 int start, end, domain;
4978 uschar *s = list[i];
4980 /* Loop for each comma-separated address */
4984 BOOL finished = FALSE;
4986 uschar *ss = parse_find_address_end(s, FALSE);
4988 if (*ss == ',') *ss = 0; else finished = TRUE;
4990 /* Check max recipients - if -t was used, these aren't recipients */
4992 if (recipients_max > 0 && ++rcount > recipients_max &&
4993 !extract_recipients)
4995 if (error_handling == ERRORS_STDERR)
4997 fprintf(stderr, "exim: too many recipients\n");
4998 exim_exit(EXIT_FAILURE);
5003 moan_to_sender(ERRMESS_TOOMANYRECIP, NULL, NULL, stdin, TRUE)?
5004 errors_sender_rc : EXIT_FAILURE;
5009 parse_extract_address(s, &errmess, &start, &end, &domain, FALSE);
5011 if (domain == 0 && !allow_unqualified_recipient)
5014 errmess = US"unqualified recipient address not allowed";
5017 if (recipient == NULL)
5019 if (error_handling == ERRORS_STDERR)
5021 fprintf(stderr, "exim: bad recipient address \"%s\": %s\n",
5022 string_printing(list[i]), errmess);
5023 exim_exit(EXIT_FAILURE);
5029 eblock.text1 = string_printing(list[i]);
5030 eblock.text2 = errmess;
5032 moan_to_sender(ERRMESS_BADARGADDRESS, &eblock, NULL, stdin, TRUE)?
5033 errors_sender_rc : EXIT_FAILURE;
5037 receive_add_recipient(recipient, -1);
5040 while (*(++s) != 0 && (*s == ',' || isspace(*s)));
5044 /* Show the recipients when debugging */
5049 if (sender_address != NULL) debug_printf("Sender: %s\n", sender_address);
5050 if (recipients_list != NULL)
5052 debug_printf("Recipients:\n");
5053 for (i = 0; i < recipients_count; i++)
5054 debug_printf(" %s\n", recipients_list[i].address);
5058 /* Run the acl_not_smtp_start ACL if required. The result of the ACL is
5059 ignored; rejecting here would just add complication, and it can just as
5060 well be done later. Allow $recipients to be visible in the ACL. */
5062 if (acl_not_smtp_start != NULL)
5064 uschar *user_msg, *log_msg;
5065 enable_dollar_recipients = TRUE;
5066 (void)acl_check(ACL_WHERE_NOTSMTP_START, NULL, acl_not_smtp_start,
5067 &user_msg, &log_msg);
5068 enable_dollar_recipients = FALSE;
5071 /* Read the data for the message. If filter_test is not FTEST_NONE, this
5072 will just read the headers for the message, and not write anything onto the
5075 message_ended = END_NOTENDED;
5076 more = receive_msg(extract_recipients);
5078 /* more is always FALSE here (not SMTP message) when reading a message
5079 for real; when reading the headers of a message for filter testing,
5080 it is TRUE if the headers were terminated by '.' and FALSE otherwise. */
5082 if (message_id[0] == 0) exim_exit(EXIT_FAILURE);
5083 } /* Non-SMTP message reception */
5085 /* If this is a filter testing run, there are headers in store, but
5086 no message on the spool. Run the filtering code in testing mode, setting
5087 the domain to the qualify domain and the local part to the current user,
5088 unless they have been set by options. The prefix and suffix are left unset
5089 unless specified. The the return path is set to to the sender unless it has
5090 already been set from a return-path header in the message. */
5092 if (filter_test != FTEST_NONE)
5094 deliver_domain = (ftest_domain != NULL)?
5095 ftest_domain : qualify_domain_recipient;
5096 deliver_domain_orig = deliver_domain;
5097 deliver_localpart = (ftest_localpart != NULL)?
5098 ftest_localpart : originator_login;
5099 deliver_localpart_orig = deliver_localpart;
5100 deliver_localpart_prefix = ftest_prefix;
5101 deliver_localpart_suffix = ftest_suffix;
5102 deliver_home = originator_home;
5104 if (return_path == NULL)
5106 printf("Return-path copied from sender\n");
5107 return_path = string_copy(sender_address);
5111 printf("Return-path = %s\n", (return_path[0] == 0)? US"<>" : return_path);
5113 printf("Sender = %s\n", (sender_address[0] == 0)? US"<>" : sender_address);
5115 receive_add_recipient(
5116 string_sprintf("%s%s%s@%s",
5117 (ftest_prefix == NULL)? US"" : ftest_prefix,
5119 (ftest_suffix == NULL)? US"" : ftest_suffix,
5120 deliver_domain), -1);
5122 printf("Recipient = %s\n", recipients_list[0].address);
5123 if (ftest_prefix != NULL) printf("Prefix = %s\n", ftest_prefix);
5124 if (ftest_suffix != NULL) printf("Suffix = %s\n", ftest_suffix);
5126 (void)chdir("/"); /* Get away from wherever the user is running this from */
5128 /* Now we run either a system filter test, or a user filter test, or both.
5129 In the latter case, headers added by the system filter will persist and be
5130 available to the user filter. We need to copy the filter variables
5133 if ((filter_test & FTEST_SYSTEM) != 0)
5135 if (!filter_runtest(filter_sfd, filter_test_sfile, TRUE, more))
5136 exim_exit(EXIT_FAILURE);
5139 memcpy(filter_sn, filter_n, sizeof(filter_sn));
5141 if ((filter_test & FTEST_USER) != 0)
5143 if (!filter_runtest(filter_ufd, filter_test_ufile, FALSE, more))
5144 exim_exit(EXIT_FAILURE);
5147 exim_exit(EXIT_SUCCESS);
5150 /* Else act on the result of message reception. We should not get here unless
5151 message_id[0] is non-zero. If queue_only is set, session_local_queue_only
5152 will be TRUE. If it is not, check on the number of messages received in this
5155 if (!session_local_queue_only &&
5156 smtp_accept_queue_per_connection > 0 &&
5157 receive_messagecount > smtp_accept_queue_per_connection)
5159 session_local_queue_only = TRUE;
5160 queue_only_reason = 2;
5163 /* Initialize local_queue_only from session_local_queue_only. If it is false,
5164 and queue_only_load is set, check that the load average is below it. If it is
5165 not, set local_queue_only TRUE. If queue_only_load_latch is true (the
5166 default), we put the whole session into queue_only mode. It then remains this
5167 way for any subsequent messages on the same SMTP connection. This is a
5168 deliberate choice; even though the load average may fall, it doesn't seem
5169 right to deliver later messages on the same call when not delivering earlier
5170 ones. However, there are odd cases where this is not wanted, so this can be
5171 changed by setting queue_only_load_latch false. */
5173 local_queue_only = session_local_queue_only;
5174 if (!local_queue_only && queue_only_load >= 0)
5176 local_queue_only = (load_average = OS_GETLOADAVG()) > queue_only_load;
5177 if (local_queue_only)
5179 queue_only_reason = 3;
5180 if (queue_only_load_latch) session_local_queue_only = TRUE;
5184 /* If running as an MUA wrapper, all queueing options and freezing options
5188 local_queue_only = queue_only_policy = deliver_freeze = FALSE;
5190 /* Log the queueing here, when it will get a message id attached, but
5191 not if queue_only is set (case 0). Case 1 doesn't happen here (too many
5194 if (local_queue_only) switch(queue_only_reason)
5197 log_write(L_delay_delivery,
5198 LOG_MAIN, "no immediate delivery: more than %d messages "
5199 "received in one connection", smtp_accept_queue_per_connection);
5203 log_write(L_delay_delivery,
5204 LOG_MAIN, "no immediate delivery: load average %.2f",
5205 (double)load_average/1000.0);
5209 /* Else do the delivery unless the ACL or local_scan() called for queue only
5210 or froze the message. Always deliver in a separate process. A fork failure is
5211 not a disaster, as the delivery will eventually happen on a subsequent queue
5212 run. The search cache must be tidied before the fork, as the parent will
5213 do it before exiting. The child will trigger a lookup failure and
5214 thereby defer the delivery if it tries to use (for example) a cached ldap
5215 connection that the parent has called unbind on. */
5217 else if (!queue_only_policy && !deliver_freeze)
5222 if ((pid = fork()) == 0)
5225 close_unwanted(); /* Close unwanted file descriptors and TLS */
5226 exim_nullstd(); /* Ensure std{in,out,err} exist */
5228 /* Re-exec Exim if we need to regain privilege (note: in mua_wrapper
5229 mode, deliver_drop_privilege is forced TRUE). */
5231 if (geteuid() != root_uid && !deliver_drop_privilege && !unprivileged)
5233 (void)child_exec_exim(CEE_EXEC_EXIT, FALSE, NULL, FALSE, 2, US"-Mc",
5235 /* Control does not return here. */
5238 /* No need to re-exec */
5240 rc = deliver_message(message_id, FALSE, FALSE);
5242 _exit((!mua_wrapper || rc == DELIVER_MUA_SUCCEEDED)?
5243 EXIT_SUCCESS : EXIT_FAILURE);
5248 log_write(0, LOG_MAIN|LOG_PANIC, "failed to fork automatic delivery "
5249 "process: %s", strerror(errno));
5252 /* In the parent, wait if synchronous delivery is required. This will
5253 always be the case in MUA wrapper mode. */
5255 else if (synchronous_delivery)
5258 while (wait(&status) != pid);
5259 if ((status & 0x00ff) != 0)
5260 log_write(0, LOG_MAIN|LOG_PANIC,
5261 "process %d crashed with signal %d while delivering %s",
5262 (int)pid, status & 0x00ff, message_id);
5263 if (mua_wrapper && (status & 0xffff) != 0) exim_exit(EXIT_FAILURE);
5267 /* The loop will repeat if more is TRUE. If we do not know know that the OS
5268 automatically reaps children (see comments above the loop), clear away any
5269 finished subprocesses here, in case there are lots of messages coming in
5270 from the same source. */
5272 #ifndef SIG_IGN_WORKS
5273 while (waitpid(-1, NULL, WNOHANG) > 0);
5277 exim_exit(EXIT_SUCCESS); /* Never returns */
5278 return 0; /* To stop compiler warning */