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(const 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(const uschar *filename, const 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)(const char *),
1042 void (**fn_addhist_ptr)(const 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 /* Checked manual pages; at least in GNU Readline 6.1, the prototypes are:
1053 * char * readline (const char *prompt);
1054 * void add_history (const char *string);
1056 *fn_readline_ptr = (char *(*)(const char*))dlsym(dlhandle, "readline");
1057 *fn_addhist_ptr = (void(*)(const char*))dlsym(dlhandle, "add_history");
1061 DEBUG(D_any) debug_printf("failed to load readline: %s\n", dlerror());
1070 /*************************************************
1071 * Get a line from stdin for testing things *
1072 *************************************************/
1074 /* This function is called when running tests that can take a number of lines
1075 of input (for example, -be and -bt). It handles continuations and trailing
1076 spaces. And prompting and a blank line output on eof. If readline() is in use,
1077 the arguments are non-NULL and provide the relevant functions.
1080 fn_readline readline function or NULL
1081 fn_addhist addhist function or NULL
1083 Returns: pointer to dynamic memory, or NULL at end of file
1087 get_stdinput(char *(*fn_readline)(const char *), void(*fn_addhist)(const char *))
1092 uschar *yield = NULL;
1094 if (fn_readline == NULL) { printf("> "); fflush(stdout); }
1098 uschar buffer[1024];
1102 char *readline_line = NULL;
1103 if (fn_readline != NULL)
1105 if ((readline_line = fn_readline((i > 0)? "":"> ")) == NULL) break;
1106 if (*readline_line != 0 && fn_addhist != NULL) fn_addhist(readline_line);
1107 p = US readline_line;
1112 /* readline() not in use */
1115 if (Ufgets(buffer, sizeof(buffer), stdin) == NULL) break;
1119 /* Handle the line */
1121 ss = p + (int)Ustrlen(p);
1122 while (ss > p && isspace(ss[-1])) ss--;
1126 while (p < ss && isspace(*p)) p++; /* leading space after cont */
1129 yield = string_cat(yield, &size, &ptr, p, ss - p);
1132 if (fn_readline != NULL) free(readline_line);
1135 if (ss == p || yield[ptr-1] != '\\')
1143 if (yield == NULL) printf("\n");
1149 /*************************************************
1150 * Output usage information for the program *
1151 *************************************************/
1153 /* This function is called when there are no recipients
1154 or a specific --help argument was added.
1157 progname information on what name we were called by
1159 Returns: DOES NOT RETURN
1163 exim_usage(uschar *progname)
1166 /* Handle specific program invocation varients */
1167 if (Ustrcmp(progname, US"-mailq") == 0)
1170 "mailq - list the contents of the mail queue\n\n"
1171 "For a list of options, see the Exim documentation.\n");
1175 /* Generic usage - we output this whatever happens */
1177 "Exim is a Mail Transfer Agent. It is normally called by Mail User Agents,\n"
1178 "not directly from a shell command line. Options and/or arguments control\n"
1179 "what it does when called. For a list of options, see the Exim documentation.\n");
1186 /*************************************************
1187 * Validate that the macros given are okay *
1188 *************************************************/
1190 /* Typically, Exim will drop privileges if macros are supplied. In some
1191 cases, we want to not do so.
1193 Arguments: none (macros is a global)
1194 Returns: true if trusted, false otherwise
1198 macros_trusted(void)
1200 #ifdef WHITELIST_D_MACROS
1202 uschar *whitelisted, *end, *p, **whites, **w;
1203 int white_count, i, n;
1205 BOOL prev_char_item, found;
1210 #ifndef WHITELIST_D_MACROS
1214 /* We only trust -D overrides for some invoking users:
1215 root, the exim run-time user, the optional config owner user.
1216 I don't know why config-owner would be needed, but since they can own the
1217 config files anyway, there's no security risk to letting them override -D. */
1218 if ( ! ((real_uid == root_uid)
1219 || (real_uid == exim_uid)
1220 #ifdef CONFIGURE_OWNER
1221 || (real_uid == config_uid)
1225 debug_printf("macros_trusted rejecting macros for uid %d\n", (int) real_uid);
1229 /* Get a list of macros which are whitelisted */
1230 whitelisted = string_copy_malloc(US WHITELIST_D_MACROS);
1231 prev_char_item = FALSE;
1233 for (p = whitelisted; *p != '\0'; ++p)
1235 if (*p == ':' || isspace(*p))
1240 prev_char_item = FALSE;
1243 if (!prev_char_item)
1244 prev_char_item = TRUE;
1251 whites = store_malloc(sizeof(uschar *) * (white_count+1));
1252 for (p = whitelisted, i = 0; (p != end) && (i < white_count); ++p)
1257 if (i == white_count)
1259 while (*p != '\0' && p < end)
1265 /* The list of macros should be very short. Accept the N*M complexity. */
1266 for (m = macros; m != NULL; m = m->next)
1269 for (w = whites; *w; ++w)
1270 if (Ustrcmp(*w, m->name) == 0)
1277 if (m->replacement == NULL)
1279 len = Ustrlen(m->replacement);
1282 n = pcre_exec(regex_whitelisted_macro, NULL, CS m->replacement, len,
1283 0, PCRE_EOPT, NULL, 0);
1286 if (n != PCRE_ERROR_NOMATCH)
1287 debug_printf("macros_trusted checking %s returned %d\n", m->name, n);
1291 DEBUG(D_any) debug_printf("macros_trusted overriden to true by whitelisting\n");
1297 /*************************************************
1298 * Entry point and high-level code *
1299 *************************************************/
1301 /* Entry point for the Exim mailer. Analyse the arguments and arrange to take
1302 the appropriate action. All the necessary functions are present in the one
1303 binary. I originally thought one should split it up, but it turns out that so
1304 much of the apparatus is needed in each chunk that one might as well just have
1305 it all available all the time, which then makes the coding easier as well.
1308 argc count of entries in argv
1309 argv argument strings, with argv[0] being the program name
1311 Returns: EXIT_SUCCESS if terminated successfully
1312 EXIT_FAILURE otherwise, except when a message has been sent
1313 to the sender, and -oee was given
1317 main(int argc, char **cargv)
1319 uschar **argv = USS cargv;
1320 int arg_receive_timeout = -1;
1321 int arg_smtp_receive_timeout = -1;
1322 int arg_error_handling = error_handling;
1323 int filter_sfd = -1;
1324 int filter_ufd = -1;
1327 int list_queue_option = 0;
1329 int msg_action_arg = -1;
1330 int namelen = (argv[0] == NULL)? 0 : Ustrlen(argv[0]);
1331 int queue_only_reason = 0;
1333 int perl_start_option = 0;
1335 int recipients_arg = argc;
1336 int sender_address_domain = 0;
1337 int test_retry_arg = -1;
1338 int test_rewrite_arg = -1;
1339 BOOL arg_queue_only = FALSE;
1340 BOOL bi_option = FALSE;
1341 BOOL checking = FALSE;
1342 BOOL count_queue = FALSE;
1343 BOOL expansion_test = FALSE;
1344 BOOL extract_recipients = FALSE;
1345 BOOL forced_delivery = FALSE;
1346 BOOL f_end_dot = FALSE;
1347 BOOL deliver_give_up = FALSE;
1348 BOOL list_queue = FALSE;
1349 BOOL list_options = FALSE;
1350 BOOL local_queue_only;
1352 BOOL one_msg_action = FALSE;
1353 BOOL queue_only_set = FALSE;
1354 BOOL receiving_message = TRUE;
1355 BOOL sender_ident_set = FALSE;
1356 BOOL session_local_queue_only;
1358 BOOL removed_privilege = FALSE;
1359 BOOL usage_wanted = FALSE;
1360 BOOL verify_address_mode = FALSE;
1361 BOOL verify_as_sender = FALSE;
1362 BOOL version_printed = FALSE;
1363 uschar *alias_arg = NULL;
1364 uschar *called_as = US"";
1365 uschar *start_queue_run_id = NULL;
1366 uschar *stop_queue_run_id = NULL;
1367 uschar *expansion_test_message = NULL;
1368 uschar *ftest_domain = NULL;
1369 uschar *ftest_localpart = NULL;
1370 uschar *ftest_prefix = NULL;
1371 uschar *ftest_suffix = NULL;
1372 uschar *malware_test_file = NULL;
1373 uschar *real_sender_address;
1374 uschar *originator_home = US"/";
1378 struct stat statbuf;
1379 pid_t passed_qr_pid = (pid_t)0;
1380 int passed_qr_pipe = -1;
1381 gid_t group_list[NGROUPS_MAX];
1383 /* Possible options for -R and -S */
1385 static uschar *rsopts[] = { US"f", US"ff", US"r", US"rf", US"rff" };
1387 /* Need to define this in case we need to change the environment in order
1388 to get rid of a bogus time zone. We have to make it char rather than uschar
1389 because some OS define it in /usr/include/unistd.h. */
1391 extern char **environ;
1393 /* If the Exim user and/or group and/or the configuration file owner/group were
1394 defined by ref:name at build time, we must now find the actual uid/gid values.
1395 This is a feature to make the lives of binary distributors easier. */
1397 #ifdef EXIM_USERNAME
1398 if (route_finduser(US EXIM_USERNAME, &pw, &exim_uid))
1402 fprintf(stderr, "exim: refusing to run with uid 0 for \"%s\"\n",
1406 exim_gid = pw->pw_gid;
1410 fprintf(stderr, "exim: failed to find uid for user name \"%s\"\n",
1416 #ifdef EXIM_GROUPNAME
1417 if (!route_findgroup(US EXIM_GROUPNAME, &exim_gid))
1419 fprintf(stderr, "exim: failed to find gid for group name \"%s\"\n",
1425 #ifdef CONFIGURE_OWNERNAME
1426 if (!route_finduser(US CONFIGURE_OWNERNAME, NULL, &config_uid))
1428 fprintf(stderr, "exim: failed to find uid for user name \"%s\"\n",
1429 CONFIGURE_OWNERNAME);
1434 /* We default the system_filter_user to be the Exim run-time user, as a
1435 sane non-root value. */
1436 system_filter_uid = exim_uid;
1438 #ifdef CONFIGURE_GROUPNAME
1439 if (!route_findgroup(US CONFIGURE_GROUPNAME, &config_gid))
1441 fprintf(stderr, "exim: failed to find gid for group name \"%s\"\n",
1442 CONFIGURE_GROUPNAME);
1447 /* In the Cygwin environment, some initialization needs doing. It is fudged
1448 in by means of this macro. */
1454 /* Check a field which is patched when we are running Exim within its
1455 testing harness; do a fast initial check, and then the whole thing. */
1457 running_in_test_harness =
1458 *running_status == '<' && Ustrcmp(running_status, "<<<testing>>>") == 0;
1460 /* The C standard says that the equivalent of setlocale(LC_ALL, "C") is obeyed
1461 at the start of a program; however, it seems that some environments do not
1462 follow this. A "strange" locale can affect the formatting of timestamps, so we
1465 setlocale(LC_ALL, "C");
1467 /* Set up the default handler for timing using alarm(). */
1469 os_non_restarting_signal(SIGALRM, sigalrm_handler);
1471 /* Ensure we have a buffer for constructing log entries. Use malloc directly,
1472 because store_malloc writes a log entry on failure. */
1474 log_buffer = (uschar *)malloc(LOG_BUFFER_SIZE);
1475 if (log_buffer == NULL)
1477 fprintf(stderr, "exim: failed to get store for log buffer\n");
1481 /* Set log_stderr to stderr, provided that stderr exists. This gets reset to
1482 NULL when the daemon is run and the file is closed. We have to use this
1483 indirection, because some systems don't allow writing to the variable "stderr".
1486 if (fstat(fileno(stderr), &statbuf) >= 0) log_stderr = stderr;
1488 /* Arrange for the PCRE regex library to use our store functions. Note that
1489 the normal calls are actually macros that add additional arguments for
1490 debugging purposes so we have to assign specially constructed functions here.
1491 The default is to use store in the stacking pool, but this is overridden in the
1492 regex_must_compile() function. */
1494 pcre_malloc = function_store_get;
1495 pcre_free = function_dummy_free;
1497 /* Ensure there is a big buffer for temporary use in several places. It is put
1498 in malloc store so that it can be freed for enlargement if necessary. */
1500 big_buffer = store_malloc(big_buffer_size);
1502 /* Set up the handler for the data request signal, and set the initial
1503 descriptive text. */
1505 set_process_info("initializing");
1506 os_restarting_signal(SIGUSR1, usr1_handler);
1508 /* SIGHUP is used to get the daemon to reconfigure. It gets set as appropriate
1509 in the daemon code. For the rest of Exim's uses, we ignore it. */
1511 signal(SIGHUP, SIG_IGN);
1513 /* We don't want to die on pipe errors as the code is written to handle
1514 the write error instead. */
1516 signal(SIGPIPE, SIG_IGN);
1518 /* Under some circumstance on some OS, Exim can get called with SIGCHLD
1519 set to SIG_IGN. This causes subprocesses that complete before the parent
1520 process waits for them not to hang around, so when Exim calls wait(), nothing
1521 is there. The wait() code has been made robust against this, but let's ensure
1522 that SIGCHLD is set to SIG_DFL, because it's tidier to wait and get a process
1523 ending status. We use sigaction rather than plain signal() on those OS where
1524 SA_NOCLDWAIT exists, because we want to be sure it is turned off. (There was a
1525 problem on AIX with this.) */
1529 struct sigaction act;
1530 act.sa_handler = SIG_DFL;
1531 sigemptyset(&(act.sa_mask));
1533 sigaction(SIGCHLD, &act, NULL);
1536 signal(SIGCHLD, SIG_DFL);
1539 /* Save the arguments for use if we re-exec exim as a daemon after receiving
1544 /* Set up the version number. Set up the leading 'E' for the external form of
1545 message ids, set the pointer to the internal form, and initialize it to
1546 indicate no message being processed. */
1549 message_id_option[0] = '-';
1550 message_id_external = message_id_option + 1;
1551 message_id_external[0] = 'E';
1552 message_id = message_id_external + 1;
1555 /* Set the umask to zero so that any files Exim creates using open() are
1556 created with the modes that it specifies. NOTE: Files created with fopen() have
1557 a problem, which was not recognized till rather late (February 2006). With this
1558 umask, such files will be world writeable. (They are all content scanning files
1559 in the spool directory, which isn't world-accessible, so this is not a
1560 disaster, but it's untidy.) I don't want to change this overall setting,
1561 however, because it will interact badly with the open() calls. Instead, there's
1562 now a function called modefopen() that fiddles with the umask while calling
1567 /* Precompile the regular expression for matching a message id. Keep this in
1568 step with the code that generates ids in the accept.c module. We need to do
1569 this here, because the -M options check their arguments for syntactic validity
1570 using mac_ismsgid, which uses this. */
1573 regex_must_compile(US"^(?:[^\\W_]{6}-){2}[^\\W_]{2}$", FALSE, TRUE);
1575 /* Precompile the regular expression that is used for matching an SMTP error
1576 code, possibly extended, at the start of an error message. Note that the
1577 terminating whitespace character is included. */
1580 regex_must_compile(US"^\\d\\d\\d\\s(?:\\d\\.\\d\\d?\\d?\\.\\d\\d?\\d?\\s)?",
1583 #ifdef WHITELIST_D_MACROS
1584 /* Precompile the regular expression used to filter the content of macros
1585 given to -D for permissibility. */
1587 regex_whitelisted_macro =
1588 regex_must_compile(US"^[A-Za-z0-9_/.-]*$", FALSE, TRUE);
1592 /* If the program is called as "mailq" treat it as equivalent to "exim -bp";
1593 this seems to be a generally accepted convention, since one finds symbolic
1594 links called "mailq" in standard OS configurations. */
1596 if ((namelen == 5 && Ustrcmp(argv[0], "mailq") == 0) ||
1597 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/mailq", 6) == 0))
1600 receiving_message = FALSE;
1601 called_as = US"-mailq";
1604 /* If the program is called as "rmail" treat it as equivalent to
1605 "exim -i -oee", thus allowing UUCP messages to be input using non-SMTP mode,
1606 i.e. preventing a single dot on a line from terminating the message, and
1607 returning with zero return code, even in cases of error (provided an error
1608 message has been sent). */
1610 if ((namelen == 5 && Ustrcmp(argv[0], "rmail") == 0) ||
1611 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/rmail", 6) == 0))
1614 called_as = US"-rmail";
1615 errors_sender_rc = EXIT_SUCCESS;
1618 /* If the program is called as "rsmtp" treat it as equivalent to "exim -bS";
1619 this is a smail convention. */
1621 if ((namelen == 5 && Ustrcmp(argv[0], "rsmtp") == 0) ||
1622 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/rsmtp", 6) == 0))
1624 smtp_input = smtp_batched_input = TRUE;
1625 called_as = US"-rsmtp";
1628 /* If the program is called as "runq" treat it as equivalent to "exim -q";
1629 this is a smail convention. */
1631 if ((namelen == 4 && Ustrcmp(argv[0], "runq") == 0) ||
1632 (namelen > 4 && Ustrncmp(argv[0] + namelen - 5, "/runq", 5) == 0))
1635 receiving_message = FALSE;
1636 called_as = US"-runq";
1639 /* If the program is called as "newaliases" treat it as equivalent to
1640 "exim -bi"; this is a sendmail convention. */
1642 if ((namelen == 10 && Ustrcmp(argv[0], "newaliases") == 0) ||
1643 (namelen > 10 && Ustrncmp(argv[0] + namelen - 11, "/newaliases", 11) == 0))
1646 receiving_message = FALSE;
1647 called_as = US"-newaliases";
1650 /* Save the original effective uid for a couple of uses later. It should
1651 normally be root, but in some esoteric environments it may not be. */
1653 original_euid = geteuid();
1655 /* Get the real uid and gid. If the caller is root, force the effective uid/gid
1656 to be the same as the real ones. This makes a difference only if Exim is setuid
1657 (or setgid) to something other than root, which could be the case in some
1658 special configurations. */
1660 real_uid = getuid();
1661 real_gid = getgid();
1663 if (real_uid == root_uid)
1665 rv = setgid(real_gid);
1668 fprintf(stderr, "exim: setgid(%ld) failed: %s\n",
1669 (long int)real_gid, strerror(errno));
1672 rv = setuid(real_uid);
1675 fprintf(stderr, "exim: setuid(%ld) failed: %s\n",
1676 (long int)real_uid, strerror(errno));
1681 /* If neither the original real uid nor the original euid was root, Exim is
1682 running in an unprivileged state. */
1684 unprivileged = (real_uid != root_uid && original_euid != root_uid);
1686 /* Scan the program's arguments. Some can be dealt with right away; others are
1687 simply recorded for checking and handling afterwards. Do a high-level switch
1688 on the second character (the one after '-'), to save some effort. */
1690 for (i = 1; i < argc; i++)
1692 BOOL badarg = FALSE;
1693 uschar *arg = argv[i];
1697 /* An argument not starting with '-' is the start of a recipients list;
1698 break out of the options-scanning loop. */
1706 /* An option consistion of -- terminates the options */
1708 if (Ustrcmp(arg, "--") == 0)
1710 recipients_arg = i + 1;
1714 /* Handle flagged options */
1716 switchchar = arg[1];
1719 /* Make all -ex options synonymous with -oex arguments, since that
1720 is assumed by various callers. Also make -qR options synonymous with -R
1721 options, as that seems to be required as well. Allow for -qqR too, and
1722 the same for -S options. */
1724 if (Ustrncmp(arg+1, "oe", 2) == 0 ||
1725 Ustrncmp(arg+1, "qR", 2) == 0 ||
1726 Ustrncmp(arg+1, "qS", 2) == 0)
1728 switchchar = arg[2];
1731 else if (Ustrncmp(arg+1, "qqR", 3) == 0 || Ustrncmp(arg+1, "qqS", 3) == 0)
1733 switchchar = arg[3];
1735 queue_2stage = TRUE;
1738 /* Make -r synonymous with -f, since it is a documented alias */
1740 else if (arg[1] == 'r') switchchar = 'f';
1742 /* Make -ov synonymous with -v */
1744 else if (Ustrcmp(arg, "-ov") == 0)
1750 /* deal with --option_aliases */
1751 else if (switchchar == '-')
1753 if (Ustrcmp(argrest, "help") == 0)
1755 usage_wanted = TRUE;
1758 else if (Ustrcmp(argrest, "version") == 0)
1765 /* High-level switch on active initial letter */
1769 /* -Btype is a sendmail option for 7bit/8bit setting. Exim is 8-bit clean
1770 so has no need of it. */
1773 if (*argrest == 0) i++; /* Skip over the type */
1778 receiving_message = FALSE; /* Reset TRUE for -bm, -bS, -bs below */
1780 /* -bd: Run in daemon mode, awaiting SMTP connections.
1781 -bdf: Ditto, but in the foreground.
1784 if (*argrest == 'd')
1786 daemon_listen = TRUE;
1787 if (*(++argrest) == 'f') background_daemon = FALSE;
1788 else if (*argrest != 0) { badarg = TRUE; break; }
1791 /* -be: Run in expansion test mode
1792 -bem: Ditto, but read a message from a file first
1795 else if (*argrest == 'e')
1797 expansion_test = checking = TRUE;
1798 if (argrest[1] == 'm')
1800 if (++i >= argc) { badarg = TRUE; break; }
1801 expansion_test_message = argv[i];
1804 if (argrest[1] != 0) { badarg = TRUE; break; }
1807 /* -bF: Run system filter test */
1809 else if (*argrest == 'F')
1811 filter_test |= FTEST_SYSTEM;
1812 if (*(++argrest) != 0) { badarg = TRUE; break; }
1813 if (++i < argc) filter_test_sfile = argv[i]; else
1815 fprintf(stderr, "exim: file name expected after %s\n", argv[i-1]);
1820 /* -bf: Run user filter test
1821 -bfd: Set domain for filter testing
1822 -bfl: Set local part for filter testing
1823 -bfp: Set prefix for filter testing
1824 -bfs: Set suffix for filter testing
1827 else if (*argrest == 'f')
1829 if (*(++argrest) == 0)
1831 filter_test |= FTEST_USER;
1832 if (++i < argc) filter_test_ufile = argv[i]; else
1834 fprintf(stderr, "exim: file name expected after %s\n", argv[i-1]);
1842 fprintf(stderr, "exim: string expected after %s\n", arg);
1845 if (Ustrcmp(argrest, "d") == 0) ftest_domain = argv[i];
1846 else if (Ustrcmp(argrest, "l") == 0) ftest_localpart = argv[i];
1847 else if (Ustrcmp(argrest, "p") == 0) ftest_prefix = argv[i];
1848 else if (Ustrcmp(argrest, "s") == 0) ftest_suffix = argv[i];
1849 else { badarg = TRUE; break; }
1853 /* -bh: Host checking - an IP address must follow. */
1855 else if (Ustrcmp(argrest, "h") == 0 || Ustrcmp(argrest, "hc") == 0)
1857 if (++i >= argc) { badarg = TRUE; break; }
1858 sender_host_address = argv[i];
1859 host_checking = checking = log_testing_mode = TRUE;
1860 host_checking_callout = argrest[1] == 'c';
1863 /* -bi: This option is used by sendmail to initialize *the* alias file,
1864 though it has the -oA option to specify a different file. Exim has no
1865 concept of *the* alias file, but since Sun's YP make script calls
1866 sendmail this way, some support must be provided. */
1868 else if (Ustrcmp(argrest, "i") == 0) bi_option = TRUE;
1870 /* -bm: Accept and deliver message - the default option. Reinstate
1871 receiving_message, which got turned off for all -b options. */
1873 else if (Ustrcmp(argrest, "m") == 0) receiving_message = TRUE;
1875 /* -bmalware: test the filename given for malware */
1877 else if (Ustrcmp(argrest, "malware") == 0)
1879 if (++i >= argc) { badarg = TRUE; break; }
1880 malware_test_file = argv[i];
1883 /* -bnq: For locally originating messages, do not qualify unqualified
1884 addresses. In the envelope, this causes errors; in header lines they
1887 else if (Ustrcmp(argrest, "nq") == 0)
1889 allow_unqualified_sender = FALSE;
1890 allow_unqualified_recipient = FALSE;
1893 /* -bpxx: List the contents of the mail queue, in various forms. If
1894 the option is -bpc, just a queue count is needed. Otherwise, if the
1895 first letter after p is r, then order is random. */
1897 else if (*argrest == 'p')
1899 if (*(++argrest) == 'c')
1902 if (*(++argrest) != 0) badarg = TRUE;
1906 if (*argrest == 'r')
1908 list_queue_option = 8;
1911 else list_queue_option = 0;
1915 /* -bp: List the contents of the mail queue, top-level only */
1917 if (*argrest == 0) {}
1919 /* -bpu: List the contents of the mail queue, top-level undelivered */
1921 else if (Ustrcmp(argrest, "u") == 0) list_queue_option += 1;
1923 /* -bpa: List the contents of the mail queue, including all delivered */
1925 else if (Ustrcmp(argrest, "a") == 0) list_queue_option += 2;
1927 /* Unknown after -bp[r] */
1937 /* -bP: List the configuration variables given as the address list.
1938 Force -v, so configuration errors get displayed. */
1940 else if (Ustrcmp(argrest, "P") == 0)
1942 list_options = TRUE;
1943 debug_selector |= D_v;
1944 debug_file = stderr;
1947 /* -brt: Test retry configuration lookup */
1949 else if (Ustrcmp(argrest, "rt") == 0)
1951 test_retry_arg = i + 1;
1955 /* -brw: Test rewrite configuration */
1957 else if (Ustrcmp(argrest, "rw") == 0)
1959 test_rewrite_arg = i + 1;
1963 /* -bS: Read SMTP commands on standard input, but produce no replies -
1964 all errors are reported by sending messages. */
1966 else if (Ustrcmp(argrest, "S") == 0)
1967 smtp_input = smtp_batched_input = receiving_message = TRUE;
1969 /* -bs: Read SMTP commands on standard input and produce SMTP replies
1970 on standard output. */
1972 else if (Ustrcmp(argrest, "s") == 0) smtp_input = receiving_message = TRUE;
1974 /* -bt: address testing mode */
1976 else if (Ustrcmp(argrest, "t") == 0)
1977 address_test_mode = checking = log_testing_mode = TRUE;
1979 /* -bv: verify addresses */
1981 else if (Ustrcmp(argrest, "v") == 0)
1982 verify_address_mode = checking = log_testing_mode = TRUE;
1984 /* -bvs: verify sender addresses */
1986 else if (Ustrcmp(argrest, "vs") == 0)
1988 verify_address_mode = checking = log_testing_mode = TRUE;
1989 verify_as_sender = TRUE;
1992 /* -bV: Print version string and support details */
1994 else if (Ustrcmp(argrest, "V") == 0)
1996 printf("Exim version %s #%s built %s\n", version_string,
1997 version_cnumber, version_date);
1998 printf("%s\n", CS version_copyright);
1999 version_printed = TRUE;
2000 show_whats_supported(stdout);
2007 /* -C: change configuration file list; ignore if it isn't really
2008 a change! Enforce a prefix check if required. */
2013 if(++i < argc) argrest = argv[i]; else
2014 { badarg = TRUE; break; }
2016 if (Ustrcmp(config_main_filelist, argrest) != 0)
2018 #ifdef ALT_CONFIG_PREFIX
2020 int len = Ustrlen(ALT_CONFIG_PREFIX);
2021 uschar *list = argrest;
2023 while((filename = string_nextinlist(&list, &sep, big_buffer,
2024 big_buffer_size)) != NULL)
2026 if ((Ustrlen(filename) < len ||
2027 Ustrncmp(filename, ALT_CONFIG_PREFIX, len) != 0 ||
2028 Ustrstr(filename, "/../") != NULL) &&
2029 (Ustrcmp(filename, "/dev/null") != 0 || real_uid != root_uid))
2031 fprintf(stderr, "-C Permission denied\n");
2036 if (real_uid != root_uid)
2038 #ifdef TRUSTED_CONFIG_LIST
2040 if (real_uid != exim_uid
2041 #ifdef CONFIGURE_OWNER
2042 && real_uid != config_uid
2045 trusted_config = FALSE;
2048 FILE *trust_list = Ufopen(TRUSTED_CONFIG_LIST, "rb");
2051 struct stat statbuf;
2053 if (fstat(fileno(trust_list), &statbuf) != 0 ||
2054 (statbuf.st_uid != root_uid /* owner not root */
2055 #ifdef CONFIGURE_OWNER
2056 && statbuf.st_uid != config_uid /* owner not the special one */
2059 (statbuf.st_gid != root_gid /* group not root */
2060 #ifdef CONFIGURE_GROUP
2061 && statbuf.st_gid != config_gid /* group not the special one */
2063 && (statbuf.st_mode & 020) != 0 /* group writeable */
2065 (statbuf.st_mode & 2) != 0) /* world writeable */
2067 trusted_config = FALSE;
2072 /* Well, the trust list at least is up to scratch... */
2073 void *reset_point = store_get(0);
2074 uschar *trusted_configs[32];
2078 while (Ufgets(big_buffer, big_buffer_size, trust_list))
2080 uschar *start = big_buffer, *nl;
2081 while (*start && isspace(*start))
2085 nl = Ustrchr(start, '\n');
2088 trusted_configs[nr_configs++] = string_copy(start);
2089 if (nr_configs == 32)
2097 uschar *list = argrest;
2099 while (trusted_config && (filename = string_nextinlist(&list,
2100 &sep, big_buffer, big_buffer_size)) != NULL)
2102 for (i=0; i < nr_configs; i++)
2104 if (Ustrcmp(filename, trusted_configs[i]) == 0)
2107 if (i == nr_configs)
2109 trusted_config = FALSE;
2113 store_reset(reset_point);
2117 /* No valid prefixes found in trust_list file. */
2118 trusted_config = FALSE;
2124 /* Could not open trust_list file. */
2125 trusted_config = FALSE;
2129 /* Not root; don't trust config */
2130 trusted_config = FALSE;
2134 config_main_filelist = argrest;
2135 config_changed = TRUE;
2140 /* -D: set up a macro definition */
2143 #ifdef DISABLE_D_OPTION
2144 fprintf(stderr, "exim: -D is not available in this Exim binary\n");
2149 macro_item *mlast = NULL;
2152 uschar *s = argrest;
2154 while (isspace(*s)) s++;
2156 if (*s < 'A' || *s > 'Z')
2158 fprintf(stderr, "exim: macro name set by -D must start with "
2159 "an upper case letter\n");
2163 while (isalnum(*s) || *s == '_')
2165 if (ptr < sizeof(name)-1) name[ptr++] = *s;
2169 if (ptr == 0) { badarg = TRUE; break; }
2170 while (isspace(*s)) s++;
2173 if (*s++ != '=') { badarg = TRUE; break; }
2174 while (isspace(*s)) s++;
2177 for (m = macros; m != NULL; m = m->next)
2179 if (Ustrcmp(m->name, name) == 0)
2181 fprintf(stderr, "exim: duplicated -D in command line\n");
2187 m = store_get(sizeof(macro_item) + Ustrlen(name));
2189 m->command_line = TRUE;
2190 if (mlast == NULL) macros = m; else mlast->next = m;
2191 Ustrcpy(m->name, name);
2192 m->replacement = string_copy(s);
2194 if (clmacro_count >= MAX_CLMACROS)
2196 fprintf(stderr, "exim: too many -D options on command line\n");
2199 clmacros[clmacro_count++] = string_sprintf("-D%s=%s", m->name,
2205 /* -d: Set debug level (see also -v below) or set the drop_cr option.
2206 The latter is now a no-op, retained for compatibility only. If -dd is used,
2207 debugging subprocesses of the daemon is disabled. */
2210 if (Ustrcmp(argrest, "ropcr") == 0)
2212 /* drop_cr = TRUE; */
2215 /* Use an intermediate variable so that we don't set debugging while
2216 decoding the debugging bits. */
2220 unsigned int selector = D_default;
2223 if (*argrest == 'd')
2225 debug_daemon = TRUE;
2229 decode_bits(&selector, NULL, D_memory, 0, argrest, debug_options,
2230 debug_options_count, US"debug", 0);
2231 debug_selector = selector;
2236 /* -E: This is a local error message. This option is not intended for
2237 external use at all, but is not restricted to trusted callers because it
2238 does no harm (just suppresses certain error messages) and if Exim is run
2239 not setuid root it won't always be trusted when it generates error
2240 messages using this option. If there is a message id following -E, point
2241 message_reference at it, for logging. */
2244 local_error_message = TRUE;
2245 if (mac_ismsgid(argrest)) message_reference = argrest;
2249 /* -ex: The vacation program calls sendmail with the undocumented "-eq"
2250 option, so it looks as if historically the -oex options are also callable
2251 without the leading -o. So we have to accept them. Before the switch,
2252 anything starting -oe has been converted to -e. Exim does not support all
2253 of the sendmail error options. */
2256 if (Ustrcmp(argrest, "e") == 0)
2258 arg_error_handling = ERRORS_SENDER;
2259 errors_sender_rc = EXIT_SUCCESS;
2261 else if (Ustrcmp(argrest, "m") == 0) arg_error_handling = ERRORS_SENDER;
2262 else if (Ustrcmp(argrest, "p") == 0) arg_error_handling = ERRORS_STDERR;
2263 else if (Ustrcmp(argrest, "q") == 0) arg_error_handling = ERRORS_STDERR;
2264 else if (Ustrcmp(argrest, "w") == 0) arg_error_handling = ERRORS_SENDER;
2269 /* -F: Set sender's full name, used instead of the gecos entry from
2270 the password file. Since users can usually alter their gecos entries,
2271 there's no security involved in using this instead. The data can follow
2272 the -F or be in the next argument. */
2277 if(++i < argc) argrest = argv[i]; else
2278 { badarg = TRUE; break; }
2280 originator_name = argrest;
2281 sender_name_forced = TRUE;
2285 /* -f: Set sender's address - this value is only actually used if Exim is
2286 run by a trusted user, or if untrusted_set_sender is set and matches the
2287 address, except that the null address can always be set by any user. The
2288 test for this happens later, when the value given here is ignored when not
2289 permitted. For an untrusted user, the actual sender is still put in Sender:
2290 if it doesn't match the From: header (unless no_local_from_check is set).
2291 The data can follow the -f or be in the next argument. The -r switch is an
2292 obsolete form of -f but since there appear to be programs out there that
2293 use anything that sendmail has ever supported, better accept it - the
2294 synonymizing is done before the switch above.
2296 At this stage, we must allow domain literal addresses, because we don't
2297 know what the setting of allow_domain_literals is yet. Ditto for trailing
2298 dots and strip_trailing_dot. */
2306 if (i+1 < argc) argrest = argv[++i]; else
2307 { badarg = TRUE; break; }
2311 sender_address = string_sprintf(""); /* Ensure writeable memory */
2315 uschar *temp = argrest + Ustrlen(argrest) - 1;
2316 while (temp >= argrest && isspace(*temp)) temp--;
2317 if (temp >= argrest && *temp == '.') f_end_dot = TRUE;
2318 allow_domain_literals = TRUE;
2319 strip_trailing_dot = TRUE;
2320 sender_address = parse_extract_address(argrest, &errmess, &start, &end,
2321 &sender_address_domain, TRUE);
2322 allow_domain_literals = FALSE;
2323 strip_trailing_dot = FALSE;
2324 if (sender_address == NULL)
2326 fprintf(stderr, "exim: bad -f address \"%s\": %s\n", argrest, errmess);
2327 return EXIT_FAILURE;
2330 sender_address_forced = TRUE;
2334 /* This is some Sendmail thing which can be ignored */
2339 /* -h: Set the hop count for an incoming message. Exim does not currently
2340 support this; it always computes it by counting the Received: headers.
2341 To put it in will require a change to the spool header file format. */
2346 if(++i < argc) argrest = argv[i]; else
2347 { badarg = TRUE; break; }
2349 if (!isdigit(*argrest)) badarg = TRUE;
2353 /* -i: Set flag so dot doesn't end non-SMTP input (same as -oi, seems
2354 not to be documented for sendmail but mailx (at least) uses it) */
2357 if (*argrest == 0) dot_ends = FALSE; else badarg = TRUE;
2362 receiving_message = FALSE;
2364 /* -MC: continue delivery of another message via an existing open
2365 file descriptor. This option is used for an internal call by the
2366 smtp transport when there is a pending message waiting to go to an
2367 address to which it has got a connection. Five subsequent arguments are
2368 required: transport name, host name, IP address, sequence number, and
2369 message_id. Transports may decline to create new processes if the sequence
2370 number gets too big. The channel is stdin. This (-MC) must be the last
2371 argument. There's a subsequent check that the real-uid is privileged.
2373 If we are running in the test harness. delay for a bit, to let the process
2374 that set this one up complete. This makes for repeatability of the logging,
2377 if (Ustrcmp(argrest, "C") == 0)
2379 union sockaddr_46 interface_sock;
2380 EXIM_SOCKLEN_T size = sizeof(interface_sock);
2384 fprintf(stderr, "exim: too many or too few arguments after -MC\n");
2385 return EXIT_FAILURE;
2388 if (msg_action_arg >= 0)
2390 fprintf(stderr, "exim: incompatible arguments\n");
2391 return EXIT_FAILURE;
2394 continue_transport = argv[++i];
2395 continue_hostname = argv[++i];
2396 continue_host_address = argv[++i];
2397 continue_sequence = Uatoi(argv[++i]);
2398 msg_action = MSG_DELIVER;
2399 msg_action_arg = ++i;
2400 forced_delivery = TRUE;
2401 queue_run_pid = passed_qr_pid;
2402 queue_run_pipe = passed_qr_pipe;
2404 if (!mac_ismsgid(argv[i]))
2406 fprintf(stderr, "exim: malformed message id %s after -MC option\n",
2408 return EXIT_FAILURE;
2411 /* Set up $sending_ip_address and $sending_port */
2413 if (getsockname(fileno(stdin), (struct sockaddr *)(&interface_sock),
2415 sending_ip_address = host_ntoa(-1, &interface_sock, NULL,
2419 fprintf(stderr, "exim: getsockname() failed after -MC option: %s\n",
2421 return EXIT_FAILURE;
2424 if (running_in_test_harness) millisleep(500);
2428 /* -MCA: set the smtp_authenticated flag; this is useful only when it
2429 precedes -MC (see above). The flag indicates that the host to which
2430 Exim is connected has accepted an AUTH sequence. */
2432 else if (Ustrcmp(argrest, "CA") == 0)
2434 smtp_authenticated = TRUE;
2438 /* -MCP: set the smtp_use_pipelining flag; this is useful only when
2439 it preceded -MC (see above) */
2441 else if (Ustrcmp(argrest, "CP") == 0)
2443 smtp_use_pipelining = TRUE;
2447 /* -MCQ: pass on the pid of the queue-running process that started
2448 this chain of deliveries and the fd of its synchronizing pipe; this
2449 is useful only when it precedes -MC (see above) */
2451 else if (Ustrcmp(argrest, "CQ") == 0)
2453 if(++i < argc) passed_qr_pid = (pid_t)(Uatol(argv[i]));
2455 if(++i < argc) passed_qr_pipe = (int)(Uatol(argv[i]));
2460 /* -MCS: set the smtp_use_size flag; this is useful only when it
2461 precedes -MC (see above) */
2463 else if (Ustrcmp(argrest, "CS") == 0)
2465 smtp_use_size = TRUE;
2469 /* -MCT: set the tls_offered flag; this is useful only when it
2470 precedes -MC (see above). The flag indicates that the host to which
2471 Exim is connected has offered TLS support. */
2474 else if (Ustrcmp(argrest, "CT") == 0)
2481 /* -M[x]: various operations on the following list of message ids:
2482 -M deliver the messages, ignoring next retry times and thawing
2483 -Mc deliver the messages, checking next retry times, no thawing
2484 -Mf freeze the messages
2485 -Mg give up on the messages
2486 -Mt thaw the messages
2487 -Mrm remove the messages
2488 In the above cases, this must be the last option. There are also the
2489 following options which are followed by a single message id, and which
2490 act on that message. Some of them use the "recipient" addresses as well.
2491 -Mar add recipient(s)
2492 -Mmad mark all recipients delivered
2493 -Mmd mark recipients(s) delivered
2495 -Mset load a message for use with -be
2497 -Mvc show copy (of whole message, in RFC 2822 format)
2502 else if (*argrest == 0)
2504 msg_action = MSG_DELIVER;
2505 forced_delivery = deliver_force_thaw = TRUE;
2507 else if (Ustrcmp(argrest, "ar") == 0)
2509 msg_action = MSG_ADD_RECIPIENT;
2510 one_msg_action = TRUE;
2512 else if (Ustrcmp(argrest, "c") == 0) msg_action = MSG_DELIVER;
2513 else if (Ustrcmp(argrest, "es") == 0)
2515 msg_action = MSG_EDIT_SENDER;
2516 one_msg_action = TRUE;
2518 else if (Ustrcmp(argrest, "f") == 0) msg_action = MSG_FREEZE;
2519 else if (Ustrcmp(argrest, "g") == 0)
2521 msg_action = MSG_DELIVER;
2522 deliver_give_up = TRUE;
2524 else if (Ustrcmp(argrest, "mad") == 0)
2526 msg_action = MSG_MARK_ALL_DELIVERED;
2528 else if (Ustrcmp(argrest, "md") == 0)
2530 msg_action = MSG_MARK_DELIVERED;
2531 one_msg_action = TRUE;
2533 else if (Ustrcmp(argrest, "rm") == 0) msg_action = MSG_REMOVE;
2534 else if (Ustrcmp(argrest, "set") == 0)
2536 msg_action = MSG_LOAD;
2537 one_msg_action = TRUE;
2539 else if (Ustrcmp(argrest, "t") == 0) msg_action = MSG_THAW;
2540 else if (Ustrcmp(argrest, "vb") == 0)
2542 msg_action = MSG_SHOW_BODY;
2543 one_msg_action = TRUE;
2545 else if (Ustrcmp(argrest, "vc") == 0)
2547 msg_action = MSG_SHOW_COPY;
2548 one_msg_action = TRUE;
2550 else if (Ustrcmp(argrest, "vh") == 0)
2552 msg_action = MSG_SHOW_HEADER;
2553 one_msg_action = TRUE;
2555 else if (Ustrcmp(argrest, "vl") == 0)
2557 msg_action = MSG_SHOW_LOG;
2558 one_msg_action = TRUE;
2560 else { badarg = TRUE; break; }
2562 /* All the -Mxx options require at least one message id. */
2564 msg_action_arg = i + 1;
2565 if (msg_action_arg >= argc)
2567 fprintf(stderr, "exim: no message ids given after %s option\n", arg);
2568 return EXIT_FAILURE;
2571 /* Some require only message ids to follow */
2573 if (!one_msg_action)
2576 for (j = msg_action_arg; j < argc; j++) if (!mac_ismsgid(argv[j]))
2578 fprintf(stderr, "exim: malformed message id %s after %s option\n",
2580 return EXIT_FAILURE;
2582 goto END_ARG; /* Remaining args are ids */
2585 /* Others require only one message id, possibly followed by addresses,
2586 which will be handled as normal arguments. */
2590 if (!mac_ismsgid(argv[msg_action_arg]))
2592 fprintf(stderr, "exim: malformed message id %s after %s option\n",
2593 argv[msg_action_arg], arg);
2594 return EXIT_FAILURE;
2601 /* Some programs seem to call the -om option without the leading o;
2602 for sendmail it askes for "me too". Exim always does this. */
2605 if (*argrest != 0) badarg = TRUE;
2609 /* -N: don't do delivery - a debugging option that stops transports doing
2610 their thing. It implies debugging at the D_v level. */
2615 dont_deliver = TRUE;
2616 debug_selector |= D_v;
2617 debug_file = stderr;
2623 /* -n: This means "don't alias" in sendmail, apparently. Just ignore
2629 /* -O: Just ignore it. In sendmail, apparently -O option=value means set
2630 option to the specified value. This form uses long names. We need to handle
2631 -O option=value and -Ooption=value. */
2638 fprintf(stderr, "exim: string expected after -O\n");
2646 /* -oA: Set an argument for the bi command (sendmail's "alternate alias
2649 if (*argrest == 'A')
2651 alias_arg = argrest + 1;
2652 if (alias_arg[0] == 0)
2654 if (i+1 < argc) alias_arg = argv[++i]; else
2656 fprintf(stderr, "exim: string expected after -oA\n");
2662 /* -oB: Set a connection message max value for remote deliveries */
2664 else if (*argrest == 'B')
2666 uschar *p = argrest + 1;
2669 if (i+1 < argc && isdigit((argv[i+1][0]))) p = argv[++i]; else
2671 connection_max_messages = 1;
2680 fprintf(stderr, "exim: number expected after -oB\n");
2683 connection_max_messages = Uatoi(p);
2687 /* -odb: background delivery */
2689 else if (Ustrcmp(argrest, "db") == 0)
2691 synchronous_delivery = FALSE;
2692 arg_queue_only = FALSE;
2693 queue_only_set = TRUE;
2696 /* -odf: foreground delivery (smail-compatible option); same effect as
2697 -odi: interactive (synchronous) delivery (sendmail-compatible option)
2700 else if (Ustrcmp(argrest, "df") == 0 || Ustrcmp(argrest, "di") == 0)
2702 synchronous_delivery = TRUE;
2703 arg_queue_only = FALSE;
2704 queue_only_set = TRUE;
2707 /* -odq: queue only */
2709 else if (Ustrcmp(argrest, "dq") == 0)
2711 synchronous_delivery = FALSE;
2712 arg_queue_only = TRUE;
2713 queue_only_set = TRUE;
2716 /* -odqs: queue SMTP only - do local deliveries and remote routing,
2717 but no remote delivery */
2719 else if (Ustrcmp(argrest, "dqs") == 0)
2722 arg_queue_only = FALSE;
2723 queue_only_set = TRUE;
2726 /* -oex: Sendmail error flags. As these are also accepted without the
2727 leading -o prefix, for compatibility with vacation and other callers,
2728 they are handled with -e above. */
2730 /* -oi: Set flag so dot doesn't end non-SMTP input (same as -i)
2731 -oitrue: Another sendmail syntax for the same */
2733 else if (Ustrcmp(argrest, "i") == 0 ||
2734 Ustrcmp(argrest, "itrue") == 0)
2737 /* -oM*: Set various characteristics for an incoming message; actually
2738 acted on for trusted callers only. */
2740 else if (*argrest == 'M')
2744 fprintf(stderr, "exim: data expected after -o%s\n", argrest);
2748 /* -oMa: Set sender host address */
2750 if (Ustrcmp(argrest, "Ma") == 0) sender_host_address = argv[++i];
2752 /* -oMaa: Set authenticator name */
2754 else if (Ustrcmp(argrest, "Maa") == 0)
2755 sender_host_authenticated = argv[++i];
2757 /* -oMas: setting authenticated sender */
2759 else if (Ustrcmp(argrest, "Mas") == 0) authenticated_sender = argv[++i];
2761 /* -oMai: setting authenticated id */
2763 else if (Ustrcmp(argrest, "Mai") == 0) authenticated_id = argv[++i];
2765 /* -oMi: Set incoming interface address */
2767 else if (Ustrcmp(argrest, "Mi") == 0) interface_address = argv[++i];
2769 /* -oMr: Received protocol */
2771 else if (Ustrcmp(argrest, "Mr") == 0) received_protocol = argv[++i];
2773 /* -oMs: Set sender host name */
2775 else if (Ustrcmp(argrest, "Ms") == 0) sender_host_name = argv[++i];
2777 /* -oMt: Set sender ident */
2779 else if (Ustrcmp(argrest, "Mt") == 0)
2781 sender_ident_set = TRUE;
2782 sender_ident = argv[++i];
2785 /* Else a bad argument */
2794 /* -om: Me-too flag for aliases. Exim always does this. Some programs
2795 seem to call this as -m (undocumented), so that is also accepted (see
2798 else if (Ustrcmp(argrest, "m") == 0) {}
2800 /* -oo: An ancient flag for old-style addresses which still seems to
2801 crop up in some calls (see in SCO). */
2803 else if (Ustrcmp(argrest, "o") == 0) {}
2805 /* -oP <name>: set pid file path for daemon */
2807 else if (Ustrcmp(argrest, "P") == 0)
2808 override_pid_file_path = argv[++i];
2810 /* -or <n>: set timeout for non-SMTP acceptance
2811 -os <n>: set timeout for SMTP acceptance */
2813 else if (*argrest == 'r' || *argrest == 's')
2815 int *tp = (*argrest == 'r')?
2816 &arg_receive_timeout : &arg_smtp_receive_timeout;
2817 if (argrest[1] == 0)
2819 if (i+1 < argc) *tp= readconf_readtime(argv[++i], 0, FALSE);
2821 else *tp = readconf_readtime(argrest + 1, 0, FALSE);
2824 fprintf(stderr, "exim: bad time value %s: abandoned\n", argv[i]);
2829 /* -oX <list>: Override local_interfaces and/or default daemon ports */
2831 else if (Ustrcmp(argrest, "X") == 0)
2832 override_local_interfaces = argv[++i];
2834 /* Unknown -o argument */
2840 /* -ps: force Perl startup; -pd force delayed Perl startup */
2844 if (*argrest == 's' && argrest[1] == 0)
2846 perl_start_option = 1;
2849 if (*argrest == 'd' && argrest[1] == 0)
2851 perl_start_option = -1;
2856 /* -panythingelse is taken as the Sendmail-compatible argument -prval:sval,
2857 which sets the host protocol and host name */
2861 if (i+1 < argc) argrest = argv[++i]; else
2862 { badarg = TRUE; break; }
2867 uschar *hn = Ustrchr(argrest, ':');
2870 received_protocol = argrest;
2874 received_protocol = string_copyn(argrest, hn - argrest);
2875 sender_host_name = hn + 1;
2882 receiving_message = FALSE;
2883 if (queue_interval >= 0)
2885 fprintf(stderr, "exim: -q specified more than once\n");
2889 /* -qq...: Do queue runs in a 2-stage manner */
2891 if (*argrest == 'q')
2893 queue_2stage = TRUE;
2897 /* -qi...: Do only first (initial) deliveries */
2899 if (*argrest == 'i')
2901 queue_run_first_delivery = TRUE;
2905 /* -qf...: Run the queue, forcing deliveries
2906 -qff..: Ditto, forcing thawing as well */
2908 if (*argrest == 'f')
2910 queue_run_force = TRUE;
2911 if (*(++argrest) == 'f')
2913 deliver_force_thaw = TRUE;
2918 /* -q[f][f]l...: Run the queue only on local deliveries */
2920 if (*argrest == 'l')
2922 queue_run_local = TRUE;
2926 /* -q[f][f][l]: Run the queue, optionally forced, optionally local only,
2927 optionally starting from a given message id. */
2929 if (*argrest == 0 &&
2930 (i + 1 >= argc || argv[i+1][0] == '-' || mac_ismsgid(argv[i+1])))
2933 if (i+1 < argc && mac_ismsgid(argv[i+1]))
2934 start_queue_run_id = argv[++i];
2935 if (i+1 < argc && mac_ismsgid(argv[i+1]))
2936 stop_queue_run_id = argv[++i];
2939 /* -q[f][f][l]<n>: Run the queue at regular intervals, optionally forced,
2940 optionally local only. */
2945 queue_interval = readconf_readtime(argrest, 0, FALSE);
2947 queue_interval = readconf_readtime(argv[++i], 0, FALSE);
2948 if (queue_interval <= 0)
2950 fprintf(stderr, "exim: bad time value %s: abandoned\n", argv[i]);
2957 case 'R': /* Synonymous with -qR... */
2958 receiving_message = FALSE;
2960 /* -Rf: As -R (below) but force all deliveries,
2961 -Rff: Ditto, but also thaw all frozen messages,
2962 -Rr: String is regex
2963 -Rrf: Regex and force
2964 -Rrff: Regex and force and thaw
2966 in all cases provided there are no further characters in this
2972 for (i = 0; i < sizeof(rsopts)/sizeof(uschar *); i++)
2974 if (Ustrcmp(argrest, rsopts[i]) == 0)
2976 if (i != 2) queue_run_force = TRUE;
2977 if (i >= 2) deliver_selectstring_regex = TRUE;
2978 if (i == 1 || i == 4) deliver_force_thaw = TRUE;
2979 argrest += Ustrlen(rsopts[i]);
2984 /* -R: Set string to match in addresses for forced queue run to
2985 pick out particular messages. */
2989 if (i+1 < argc) deliver_selectstring = argv[++i]; else
2991 fprintf(stderr, "exim: string expected after -R\n");
2995 else deliver_selectstring = argrest;
2999 /* -r: an obsolete synonym for -f (see above) */
3002 /* -S: Like -R but works on sender. */
3004 case 'S': /* Synonymous with -qS... */
3005 receiving_message = FALSE;
3007 /* -Sf: As -S (below) but force all deliveries,
3008 -Sff: Ditto, but also thaw all frozen messages,
3009 -Sr: String is regex
3010 -Srf: Regex and force
3011 -Srff: Regex and force and thaw
3013 in all cases provided there are no further characters in this
3019 for (i = 0; i < sizeof(rsopts)/sizeof(uschar *); i++)
3021 if (Ustrcmp(argrest, rsopts[i]) == 0)
3023 if (i != 2) queue_run_force = TRUE;
3024 if (i >= 2) deliver_selectstring_sender_regex = TRUE;
3025 if (i == 1 || i == 4) deliver_force_thaw = TRUE;
3026 argrest += Ustrlen(rsopts[i]);
3031 /* -S: Set string to match in addresses for forced queue run to
3032 pick out particular messages. */
3036 if (i+1 < argc) deliver_selectstring_sender = argv[++i]; else
3038 fprintf(stderr, "exim: string expected after -S\n");
3042 else deliver_selectstring_sender = argrest;
3045 /* -Tqt is an option that is exclusively for use by the testing suite.
3046 It is not recognized in other circumstances. It allows for the setting up
3047 of explicit "queue times" so that various warning/retry things can be
3048 tested. Otherwise variability of clock ticks etc. cause problems. */
3051 if (running_in_test_harness && Ustrcmp(argrest, "qt") == 0)
3052 fudged_queue_times = argv[++i];
3057 /* -t: Set flag to extract recipients from body of message. */
3060 if (*argrest == 0) extract_recipients = TRUE;
3062 /* -ti: Set flag to extract recipients from body of message, and also
3063 specify that dot does not end the message. */
3065 else if (Ustrcmp(argrest, "i") == 0)
3067 extract_recipients = TRUE;
3071 /* -tls-on-connect: don't wait for STARTTLS (for old clients) */
3074 else if (Ustrcmp(argrest, "ls-on-connect") == 0) tls_on_connect = TRUE;
3081 /* -U: This means "initial user submission" in sendmail, apparently. The
3082 doc claims that in future sendmail may refuse syntactically invalid
3083 messages instead of fixing them. For the moment, we just ignore it. */
3089 /* -v: verify things - this is a very low-level debugging */
3094 debug_selector |= D_v;
3095 debug_file = stderr;
3101 /* -x: AIX uses this to indicate some fancy 8-bit character stuff:
3103 The -x flag tells the sendmail command that mail from a local
3104 mail program has National Language Support (NLS) extended characters
3105 in the body of the mail item. The sendmail command can send mail with
3106 extended NLS characters across networks that normally corrupts these
3109 As Exim is 8-bit clean, it just ignores this flag. */
3112 if (*argrest != 0) badarg = TRUE;
3115 /* All other initial characters are errors */
3120 } /* End of high-level switch statement */
3122 /* Failed to recognize the option, or syntax error */
3126 fprintf(stderr, "exim abandoned: unknown, malformed, or incomplete "
3127 "option %s\n", arg);
3133 /* If -R or -S have been specified without -q, assume a single queue run. */
3135 if ((deliver_selectstring != NULL || deliver_selectstring_sender != NULL) &&
3136 queue_interval < 0) queue_interval = 0;
3140 /* If usage_wanted is set we call the usage function - which never returns */
3141 if (usage_wanted) exim_usage(called_as);
3143 /* Arguments have been processed. Check for incompatibilities. */
3145 (smtp_input || extract_recipients || recipients_arg < argc) &&
3146 (daemon_listen || queue_interval >= 0 || bi_option ||
3147 test_retry_arg >= 0 || test_rewrite_arg >= 0 ||
3148 filter_test != FTEST_NONE || (msg_action_arg > 0 && !one_msg_action))
3151 msg_action_arg > 0 &&
3152 (daemon_listen || queue_interval >= 0 || list_options ||
3153 (checking && msg_action != MSG_LOAD) ||
3154 bi_option || test_retry_arg >= 0 || test_rewrite_arg >= 0)
3157 (daemon_listen || queue_interval >= 0) &&
3158 (sender_address != NULL || list_options || list_queue || checking ||
3162 daemon_listen && queue_interval == 0
3166 (checking || smtp_input || extract_recipients ||
3167 filter_test != FTEST_NONE || bi_option)
3170 verify_address_mode &&
3171 (address_test_mode || smtp_input || extract_recipients ||
3172 filter_test != FTEST_NONE || bi_option)
3175 address_test_mode && (smtp_input || extract_recipients ||
3176 filter_test != FTEST_NONE || bi_option)
3179 smtp_input && (sender_address != NULL || filter_test != FTEST_NONE ||
3183 deliver_selectstring != NULL && queue_interval < 0
3186 msg_action == MSG_LOAD &&
3187 (!expansion_test || expansion_test_message != NULL)
3191 fprintf(stderr, "exim: incompatible command-line options or arguments\n");
3195 /* If debugging is set up, set the file and the file descriptor to pass on to
3196 child processes. It should, of course, be 2 for stderr. Also, force the daemon
3197 to run in the foreground. */
3199 if (debug_selector != 0)
3201 debug_file = stderr;
3202 debug_fd = fileno(debug_file);
3203 background_daemon = FALSE;
3204 if (running_in_test_harness) millisleep(100); /* lets caller finish */
3205 if (debug_selector != D_v) /* -v only doesn't show this */
3207 debug_printf("Exim version %s uid=%ld gid=%ld pid=%d D=%x\n",
3208 version_string, (long int)real_uid, (long int)real_gid, (int)getpid(),
3210 if (!version_printed)
3211 show_whats_supported(stderr);
3215 /* When started with root privilege, ensure that the limits on the number of
3216 open files and the number of processes (where that is accessible) are
3217 sufficiently large, or are unset, in case Exim has been called from an
3218 environment where the limits are screwed down. Not all OS have the ability to
3219 change some of these limits. */
3223 DEBUG(D_any) debug_print_ids(US"Exim has no root privilege:");
3229 #ifdef RLIMIT_NOFILE
3230 if (getrlimit(RLIMIT_NOFILE, &rlp) < 0)
3232 log_write(0, LOG_MAIN|LOG_PANIC, "getrlimit(RLIMIT_NOFILE) failed: %s",
3234 rlp.rlim_cur = rlp.rlim_max = 0;
3237 /* I originally chose 1000 as a nice big number that was unlikely to
3238 be exceeded. It turns out that some older OS have a fixed upper limit of
3241 if (rlp.rlim_cur < 1000)
3243 rlp.rlim_cur = rlp.rlim_max = 1000;
3244 if (setrlimit(RLIMIT_NOFILE, &rlp) < 0)
3246 rlp.rlim_cur = rlp.rlim_max = 256;
3247 if (setrlimit(RLIMIT_NOFILE, &rlp) < 0)
3248 log_write(0, LOG_MAIN|LOG_PANIC, "setrlimit(RLIMIT_NOFILE) failed: %s",
3255 if (getrlimit(RLIMIT_NPROC, &rlp) < 0)
3257 log_write(0, LOG_MAIN|LOG_PANIC, "getrlimit(RLIMIT_NPROC) failed: %s",
3259 rlp.rlim_cur = rlp.rlim_max = 0;
3262 #ifdef RLIM_INFINITY
3263 if (rlp.rlim_cur != RLIM_INFINITY && rlp.rlim_cur < 1000)
3265 rlp.rlim_cur = rlp.rlim_max = RLIM_INFINITY;
3267 if (rlp.rlim_cur < 1000)
3269 rlp.rlim_cur = rlp.rlim_max = 1000;
3271 if (setrlimit(RLIMIT_NPROC, &rlp) < 0)
3272 log_write(0, LOG_MAIN|LOG_PANIC, "setrlimit(RLIMIT_NPROC) failed: %s",
3278 /* Exim is normally entered as root (but some special configurations are
3279 possible that don't do this). However, it always spins off sub-processes that
3280 set their uid and gid as required for local delivery. We don't want to pass on
3281 any extra groups that root may belong to, so we want to get rid of them all at
3284 We need to obey setgroups() at this stage, before possibly giving up root
3285 privilege for a changed configuration file, but later on we might need to
3286 check on the additional groups for the admin user privilege - can't do that
3287 till after reading the config, which might specify the exim gid. Therefore,
3288 save the group list here first. */
3290 group_count = getgroups(NGROUPS_MAX, group_list);
3291 if (group_count < 0)
3293 fprintf(stderr, "exim: getgroups() failed: %s\n", strerror(errno));
3297 /* There is a fundamental difference in some BSD systems in the matter of
3298 groups. FreeBSD and BSDI are known to be different; NetBSD and OpenBSD are
3299 known not to be different. On the "different" systems there is a single group
3300 list, and the first entry in it is the current group. On all other versions of
3301 Unix there is a supplementary group list, which is in *addition* to the current
3302 group. Consequently, to get rid of all extraneous groups on a "standard" system
3303 you pass over 0 groups to setgroups(), while on a "different" system you pass
3304 over a single group - the current group, which is always the first group in the
3305 list. Calling setgroups() with zero groups on a "different" system results in
3306 an error return. The following code should cope with both types of system.
3308 However, if this process isn't running as root, setgroups() can't be used
3309 since you have to be root to run it, even if throwing away groups. Not being
3310 root here happens only in some unusual configurations. We just ignore the
3313 if (setgroups(0, NULL) != 0)
3315 if (setgroups(1, group_list) != 0 && !unprivileged)
3317 fprintf(stderr, "exim: setgroups() failed: %s\n", strerror(errno));
3322 /* If the configuration file name has been altered by an argument on the
3323 command line (either a new file name or a macro definition) and the caller is
3324 not root, or if this is a filter testing run, remove any setuid privilege the
3325 program has and run as the underlying user.
3327 The exim user is locked out of this, which severely restricts the use of -C
3330 Otherwise, set the real ids to the effective values (should be root unless run
3331 from inetd, which it can either be root or the exim uid, if one is configured).
3333 There is a private mechanism for bypassing some of this, in order to make it
3334 possible to test lots of configurations automatically, without having either to
3335 recompile each time, or to patch in an actual configuration file name and other
3336 values (such as the path name). If running in the test harness, pretend that
3337 configuration file changes and macro definitions haven't happened. */
3340 (!trusted_config || /* Config changed, or */
3341 !macros_trusted()) && /* impermissible macros and */
3342 real_uid != root_uid && /* Not root, and */
3343 !running_in_test_harness /* Not fudged */
3345 expansion_test /* expansion testing */
3347 filter_test != FTEST_NONE) /* Filter testing */
3349 setgroups(group_count, group_list);
3350 exim_setugid(real_uid, real_gid, FALSE,
3351 US"-C, -D, -be or -bf forces real uid");
3352 removed_privilege = TRUE;
3354 /* In the normal case when Exim is called like this, stderr is available
3355 and should be used for any logging information because attempts to write
3356 to the log will usually fail. To arrange this, we unset really_exim. However,
3357 if no stderr is available there is no point - we might as well have a go
3358 at the log (if it fails, syslog will be written).
3360 Note that if the invoker is Exim, the logs remain available. Messing with
3361 this causes unlogged successful deliveries. */
3363 if ((log_stderr != NULL) && (real_uid != exim_uid))
3364 really_exim = FALSE;
3367 /* Privilege is to be retained for the moment. It may be dropped later,
3368 depending on the job that this Exim process has been asked to do. For now, set
3369 the real uid to the effective so that subsequent re-execs of Exim are done by a
3372 else exim_setugid(geteuid(), getegid(), FALSE, US"forcing real = effective");
3374 /* If testing a filter, open the file(s) now, before wasting time doing other
3375 setups and reading the message. */
3377 if ((filter_test & FTEST_SYSTEM) != 0)
3379 filter_sfd = Uopen(filter_test_sfile, O_RDONLY, 0);
3382 fprintf(stderr, "exim: failed to open %s: %s\n", filter_test_sfile,
3384 return EXIT_FAILURE;
3388 if ((filter_test & FTEST_USER) != 0)
3390 filter_ufd = Uopen(filter_test_ufile, O_RDONLY, 0);
3393 fprintf(stderr, "exim: failed to open %s: %s\n", filter_test_ufile,
3395 return EXIT_FAILURE;
3399 /* Read the main runtime configuration data; this gives up if there
3400 is a failure. It leaves the configuration file open so that the subsequent
3401 configuration data for delivery can be read if needed. */
3405 /* Handle the decoding of logging options. */
3407 decode_bits(&log_write_selector, &log_extra_selector, 0, 0,
3408 log_selector_string, log_options, log_options_count, US"log", 0);
3412 debug_printf("configuration file is %s\n", config_main_filename);
3413 debug_printf("log selectors = %08x %08x\n", log_write_selector,
3414 log_extra_selector);
3417 /* If domain literals are not allowed, check the sender address that was
3418 supplied with -f. Ditto for a stripped trailing dot. */
3420 if (sender_address != NULL)
3422 if (sender_address[sender_address_domain] == '[' && !allow_domain_literals)
3424 fprintf(stderr, "exim: bad -f address \"%s\": domain literals not "
3425 "allowed\n", sender_address);
3426 return EXIT_FAILURE;
3428 if (f_end_dot && !strip_trailing_dot)
3430 fprintf(stderr, "exim: bad -f address \"%s.\": domain is malformed "
3431 "(trailing dot not allowed)\n", sender_address);
3432 return EXIT_FAILURE;
3436 /* Paranoia check of maximum lengths of certain strings. There is a check
3437 on the length of the log file path in log.c, which will come into effect
3438 if there are any calls to write the log earlier than this. However, if we
3439 get this far but the string is very long, it is better to stop now than to
3440 carry on and (e.g.) receive a message and then have to collapse. The call to
3441 log_write() from here will cause the ultimate panic collapse if the complete
3442 file name exceeds the buffer length. */
3444 if (Ustrlen(log_file_path) > 200)
3445 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3446 "log_file_path is longer than 200 chars: aborting");
3448 if (Ustrlen(pid_file_path) > 200)
3449 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3450 "pid_file_path is longer than 200 chars: aborting");
3452 if (Ustrlen(spool_directory) > 200)
3453 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3454 "spool_directory is longer than 200 chars: aborting");
3456 /* Length check on the process name given to syslog for its TAG field,
3457 which is only permitted to be 32 characters or less. See RFC 3164. */
3459 if (Ustrlen(syslog_processname) > 32)
3460 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3461 "syslog_processname is longer than 32 chars: aborting");
3463 /* In some operating systems, the environment variable TMPDIR controls where
3464 temporary files are created; Exim doesn't use these (apart from when delivering
3465 to MBX mailboxes), but called libraries such as DBM libraries may require them.
3466 If TMPDIR is found in the environment, reset it to the value defined in the
3467 TMPDIR macro, if this macro is defined. */
3472 for (p = USS environ; *p != NULL; p++)
3474 if (Ustrncmp(*p, "TMPDIR=", 7) == 0 &&
3475 Ustrcmp(*p+7, TMPDIR) != 0)
3477 uschar *newp = malloc(Ustrlen(TMPDIR) + 8);
3478 sprintf(CS newp, "TMPDIR=%s", TMPDIR);
3480 DEBUG(D_any) debug_printf("reset TMPDIR=%s in environment\n", TMPDIR);
3486 /* Timezone handling. If timezone_string is "utc", set a flag to cause all
3487 timestamps to be in UTC (gmtime() is used instead of localtime()). Otherwise,
3488 we may need to get rid of a bogus timezone setting. This can arise when Exim is
3489 called by a user who has set the TZ variable. This then affects the timestamps
3490 in log files and in Received: headers, and any created Date: header lines. The
3491 required timezone is settable in the configuration file, so nothing can be done
3492 about this earlier - but hopefully nothing will normally be logged earlier than
3493 this. We have to make a new environment if TZ is wrong, but don't bother if
3494 timestamps_utc is set, because then all times are in UTC anyway. */
3496 if (timezone_string != NULL && strcmpic(timezone_string, US"UTC") == 0)
3498 timestamps_utc = TRUE;
3502 uschar *envtz = US getenv("TZ");
3503 if ((envtz == NULL && timezone_string != NULL) ||
3505 (timezone_string == NULL ||
3506 Ustrcmp(timezone_string, envtz) != 0)))
3508 uschar **p = USS environ;
3512 while (*p++ != NULL) count++;
3513 if (envtz == NULL) count++;
3514 newp = new = malloc(sizeof(uschar *) * (count + 1));
3515 for (p = USS environ; *p != NULL; p++)
3517 if (Ustrncmp(*p, "TZ=", 3) == 0) continue;
3520 if (timezone_string != NULL)
3522 *newp = malloc(Ustrlen(timezone_string) + 4);
3523 sprintf(CS *newp++, "TZ=%s", timezone_string);
3528 DEBUG(D_any) debug_printf("Reset TZ to %s: time is %s\n", timezone_string,
3529 tod_stamp(tod_log));
3533 /* Handle the case when we have removed the setuid privilege because of -C or
3534 -D. This means that the caller of Exim was not root.
3536 There is a problem if we were running as the Exim user. The sysadmin may
3537 expect this case to retain privilege because "the binary was called by the
3538 Exim user", but it hasn't, because either the -D option set macros, or the
3539 -C option set a non-trusted configuration file. There are two possibilities:
3541 (1) If deliver_drop_privilege is set, Exim is not going to re-exec in order
3542 to do message deliveries. Thus, the fact that it is running as a
3543 non-privileged user is plausible, and might be wanted in some special
3544 configurations. However, really_exim will have been set false when
3545 privilege was dropped, to stop Exim trying to write to its normal log
3546 files. Therefore, re-enable normal log processing, assuming the sysadmin
3547 has set up the log directory correctly.
3549 (2) If deliver_drop_privilege is not set, the configuration won't work as
3550 apparently intended, and so we log a panic message. In order to retain
3551 root for -C or -D, the caller must either be root or be invoking a
3552 trusted configuration file (when deliver_drop_privilege is false). */
3554 if (removed_privilege && (!trusted_config || macros != NULL) &&
3555 real_uid == exim_uid)
3557 if (deliver_drop_privilege)
3558 really_exim = TRUE; /* let logging work normally */
3560 log_write(0, LOG_MAIN|LOG_PANIC,
3561 "exim user lost privilege for using %s option",
3562 trusted_config? "-D" : "-C");
3565 /* Start up Perl interpreter if Perl support is configured and there is a
3566 perl_startup option, and the configuration or the command line specifies
3567 initializing starting. Note that the global variables are actually called
3568 opt_perl_xxx to avoid clashing with perl's namespace (perl_*). */
3571 if (perl_start_option != 0)
3572 opt_perl_at_start = (perl_start_option > 0);
3573 if (opt_perl_at_start && opt_perl_startup != NULL)
3576 DEBUG(D_any) debug_printf("Starting Perl interpreter\n");
3577 errstr = init_perl(opt_perl_startup);
3580 fprintf(stderr, "exim: error in perl_startup code: %s\n", errstr);
3581 return EXIT_FAILURE;
3583 opt_perl_started = TRUE;
3585 #endif /* EXIM_PERL */
3587 /* Initialise lookup_list
3588 If debugging, already called above via version reporting.
3589 This does mean that debugging causes the list to be initialised while root.
3590 This *should* be harmless -- all modules are loaded from a fixed dir and
3591 it's code that would, if not a module, be part of Exim already. */
3594 /* Log the arguments of the call if the configuration file said so. This is
3595 a debugging feature for finding out what arguments certain MUAs actually use.
3596 Don't attempt it if logging is disabled, or if listing variables or if
3597 verifying/testing addresses or expansions. */
3599 if (((debug_selector & D_any) != 0 || (log_extra_selector & LX_arguments) != 0)
3600 && really_exim && !list_options && !checking)
3603 uschar *p = big_buffer;
3605 (void)getcwd(CS p+4, big_buffer_size - 4);
3607 (void)string_format(p, big_buffer_size - (p - big_buffer), " %d args:", argc);
3609 for (i = 0; i < argc; i++)
3611 int len = Ustrlen(argv[i]);
3614 if (p + len + 8 >= big_buffer + big_buffer_size)
3617 log_write(0, LOG_MAIN, "%s", big_buffer);
3618 Ustrcpy(big_buffer, "...");
3621 printing = string_printing(argv[i]);
3622 if (printing[0] == 0) quote = US"\""; else
3624 uschar *pp = printing;
3626 while (*pp != 0) if (isspace(*pp++)) { quote = US"\""; break; }
3628 sprintf(CS p, " %s%.*s%s", quote, (int)(big_buffer_size -
3629 (p - big_buffer) - 4), printing, quote);
3633 if ((log_extra_selector & LX_arguments) != 0)
3634 log_write(0, LOG_MAIN, "%s", big_buffer);
3636 debug_printf("%s\n", big_buffer);
3639 /* Set the working directory to be the top-level spool directory. We don't rely
3640 on this in the code, which always uses fully qualified names, but it's useful
3641 for core dumps etc. Don't complain if it fails - the spool directory might not
3642 be generally accessible and calls with the -C option (and others) have lost
3643 privilege by now. Before the chdir, we try to ensure that the directory exists.
3646 if (Uchdir(spool_directory) != 0)
3648 (void)directory_make(spool_directory, US"", SPOOL_DIRECTORY_MODE, FALSE);
3649 (void)Uchdir(spool_directory);
3652 /* Handle calls with the -bi option. This is a sendmail option to rebuild *the*
3653 alias file. Exim doesn't have such a concept, but this call is screwed into
3654 Sun's YP makefiles. Handle this by calling a configured script, as the real
3655 user who called Exim. The -oA option can be used to pass an argument to the
3660 (void)fclose(config_file);
3661 if (bi_command != NULL)
3665 argv[i++] = bi_command;
3666 if (alias_arg != NULL) argv[i++] = alias_arg;
3669 setgroups(group_count, group_list);
3670 exim_setugid(real_uid, real_gid, FALSE, US"running bi_command");
3672 DEBUG(D_exec) debug_printf("exec %.256s %.256s\n", argv[0],
3673 (argv[1] == NULL)? US"" : argv[1]);
3675 execv(CS argv[0], (char *const *)argv);
3676 fprintf(stderr, "exim: exec failed: %s\n", strerror(errno));
3681 DEBUG(D_any) debug_printf("-bi used but bi_command not set; exiting\n");
3686 /* If an action on specific messages is requested, or if a daemon or queue
3687 runner is being started, we need to know if Exim was called by an admin user.
3688 This is the case if the real user is root or exim, or if the real group is
3689 exim, or if one of the supplementary groups is exim or a group listed in
3690 admin_groups. We don't fail all message actions immediately if not admin_user,
3691 since some actions can be performed by non-admin users. Instead, set admin_user
3692 for later interrogation. */
3694 if (real_uid == root_uid || real_uid == exim_uid || real_gid == exim_gid)
3699 for (i = 0; i < group_count; i++)
3701 if (group_list[i] == exim_gid) admin_user = TRUE;
3702 else if (admin_groups != NULL)
3704 for (j = 1; j <= (int)(admin_groups[0]); j++)
3705 if (admin_groups[j] == group_list[i])
3706 { admin_user = TRUE; break; }
3708 if (admin_user) break;
3712 /* Another group of privileged users are the trusted users. These are root,
3713 exim, and any caller matching trusted_users or trusted_groups. Trusted callers
3714 are permitted to specify sender_addresses with -f on the command line, and
3715 other message parameters as well. */
3717 if (real_uid == root_uid || real_uid == exim_uid)
3718 trusted_caller = TRUE;
3723 if (trusted_users != NULL)
3725 for (i = 1; i <= (int)(trusted_users[0]); i++)
3726 if (trusted_users[i] == real_uid)
3727 { trusted_caller = TRUE; break; }
3730 if (!trusted_caller && trusted_groups != NULL)
3732 for (i = 1; i <= (int)(trusted_groups[0]); i++)
3734 if (trusted_groups[i] == real_gid)
3735 trusted_caller = TRUE;
3736 else for (j = 0; j < group_count; j++)
3738 if (trusted_groups[i] == group_list[j])
3739 { trusted_caller = TRUE; break; }
3741 if (trusted_caller) break;
3746 if (trusted_caller) DEBUG(D_any) debug_printf("trusted user\n");
3747 if (admin_user) DEBUG(D_any) debug_printf("admin user\n");
3749 /* Only an admin user may start the daemon or force a queue run in the default
3750 configuration, but the queue run restriction can be relaxed. Only an admin
3751 user may request that a message be returned to its sender forthwith. Only an
3752 admin user may specify a debug level greater than D_v (because it might show
3753 passwords, etc. in lookup queries). Only an admin user may request a queue
3754 count. Only an admin user can use the test interface to scan for email
3755 (because Exim will be in the spool dir and able to look at mails). */
3759 BOOL debugset = (debug_selector & ~D_v) != 0;
3760 if (deliver_give_up || daemon_listen || malware_test_file ||
3761 (count_queue && queue_list_requires_admin) ||
3762 (list_queue && queue_list_requires_admin) ||
3763 (queue_interval >= 0 && prod_requires_admin) ||
3764 (debugset && !running_in_test_harness))
3766 fprintf(stderr, "exim:%s permission denied\n", debugset? " debugging" : "");
3771 /* If the real user is not root or the exim uid, the argument for passing
3772 in an open TCP/IP connection for another message is not permitted, nor is
3773 running with the -N option for any delivery action, unless this call to exim is
3774 one that supplied an input message, or we are using a patched exim for
3775 regression testing. */
3777 if (real_uid != root_uid && real_uid != exim_uid &&
3778 (continue_hostname != NULL ||
3780 (queue_interval >= 0 || daemon_listen || msg_action_arg > 0)
3781 )) && !running_in_test_harness)
3783 fprintf(stderr, "exim: Permission denied\n");
3784 return EXIT_FAILURE;
3787 /* If the caller is not trusted, certain arguments are ignored when running for
3788 real, but are permitted when checking things (-be, -bv, -bt, -bh, -bf, -bF).
3789 Note that authority for performing certain actions on messages is tested in the
3790 queue_action() function. */
3792 if (!trusted_caller && !checking && filter_test == FTEST_NONE)
3794 sender_host_name = sender_host_address = interface_address =
3795 sender_ident = received_protocol = NULL;
3796 sender_host_port = interface_port = 0;
3797 sender_host_authenticated = authenticated_sender = authenticated_id = NULL;
3800 /* If a sender host address is set, extract the optional port number off the
3801 end of it and check its syntax. Do the same thing for the interface address.
3802 Exim exits if the syntax is bad. */
3806 if (sender_host_address != NULL)
3807 sender_host_port = check_port(sender_host_address);
3808 if (interface_address != NULL)
3809 interface_port = check_port(interface_address);
3812 /* If an SMTP message is being received check to see if the standard input is a
3813 TCP/IP socket. If it is, we assume that Exim was called from inetd if the
3814 caller is root or the Exim user, or if the port is a privileged one. Otherwise,
3819 union sockaddr_46 inetd_sock;
3820 EXIM_SOCKLEN_T size = sizeof(inetd_sock);
3821 if (getpeername(0, (struct sockaddr *)(&inetd_sock), &size) == 0)
3823 int family = ((struct sockaddr *)(&inetd_sock))->sa_family;
3824 if (family == AF_INET || family == AF_INET6)
3826 union sockaddr_46 interface_sock;
3827 size = sizeof(interface_sock);
3829 if (getsockname(0, (struct sockaddr *)(&interface_sock), &size) == 0)
3830 interface_address = host_ntoa(-1, &interface_sock, NULL,
3833 if (host_is_tls_on_connect_port(interface_port)) tls_on_connect = TRUE;
3835 if (real_uid == root_uid || real_uid == exim_uid || interface_port < 1024)
3838 sender_host_address = host_ntoa(-1, (struct sockaddr *)(&inetd_sock),
3839 NULL, &sender_host_port);
3840 if (mua_wrapper) log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Input from "
3841 "inetd is not supported when mua_wrapper is set");
3846 "exim: Permission denied (unprivileged user, unprivileged port)\n");
3847 return EXIT_FAILURE;
3853 /* If the load average is going to be needed while receiving a message, get it
3854 now for those OS that require the first call to os_getloadavg() to be done as
3855 root. There will be further calls later for each message received. */
3857 #ifdef LOAD_AVG_NEEDS_ROOT
3858 if (receiving_message &&
3859 (queue_only_load >= 0 ||
3860 (is_inetd && smtp_load_reserve >= 0)
3863 load_average = OS_GETLOADAVG();
3867 /* The queue_only configuration option can be overridden by -odx on the command
3868 line, except that if queue_only_override is false, queue_only cannot be unset
3869 from the command line. */
3871 if (queue_only_set && (queue_only_override || arg_queue_only))
3872 queue_only = arg_queue_only;
3874 /* The receive_timeout and smtp_receive_timeout options can be overridden by
3877 if (arg_receive_timeout >= 0) receive_timeout = arg_receive_timeout;
3878 if (arg_smtp_receive_timeout >= 0)
3879 smtp_receive_timeout = arg_smtp_receive_timeout;
3881 /* If Exim was started with root privilege, unless we have already removed the
3882 root privilege above as a result of -C, -D, -be, -bf or -bF, remove it now
3883 except when starting the daemon or doing some kind of delivery or address
3884 testing (-bt). These are the only cases when root need to be retained. We run
3885 as exim for -bv and -bh. However, if deliver_drop_privilege is set, root is
3886 retained only for starting the daemon. We always do the initgroups() in this
3887 situation (controlled by the TRUE below), in order to be as close as possible
3888 to the state Exim usually runs in. */
3890 if (!unprivileged && /* originally had root AND */
3891 !removed_privilege && /* still got root AND */
3892 !daemon_listen && /* not starting the daemon */
3893 queue_interval <= 0 && /* (either kind of daemon) */
3895 deliver_drop_privilege || /* requested unprivileged */
3897 queue_interval < 0 && /* not running the queue */
3898 (msg_action_arg < 0 || /* and */
3899 msg_action != MSG_DELIVER) && /* not delivering and */
3900 (!checking || !address_test_mode) /* not address checking */
3904 exim_setugid(exim_uid, exim_gid, TRUE, US"privilege not needed");
3907 /* When we are retaining a privileged uid, we still change to the exim gid. */
3912 rv = setgid(exim_gid);
3913 /* Impact of failure is that some stuff might end up with an incorrect group.
3914 We track this for failures from root, since any attempt to change privilege
3915 by root should succeed and failures should be examined. For non-root,
3916 there's no security risk. For me, it's { exim -bV } on a just-built binary,
3917 no need to complain then. */
3920 if (!(unprivileged || removed_privilege))
3923 "exim: changing group failed: %s\n", strerror(errno));
3927 DEBUG(D_any) debug_printf("changing group to %ld failed: %s\n",
3928 (long int)exim_gid, strerror(errno));
3932 /* Handle a request to scan a file for malware */
3933 if (malware_test_file)
3935 #ifdef WITH_CONTENT_SCAN
3937 set_process_info("scanning file for malware");
3938 result = malware_in_file(malware_test_file);
3941 printf("No malware found.\n");
3946 printf("Malware lookup returned non-okay/fail: %d\n", result);
3950 printf("Malware found: %s\n", malware_name);
3952 printf("Malware scan detected malware of unknown name.\n");
3954 printf("Malware scanning not enabled at compile time.\n");
3959 /* Handle a request to list the delivery queue */
3963 set_process_info("listing the queue");
3964 queue_list(list_queue_option, argv + recipients_arg, argc - recipients_arg);
3968 /* Handle a request to count the delivery queue */
3972 set_process_info("counting the queue");
3977 /* Handle actions on specific messages, except for the force delivery and
3978 message load actions, which are done below. Some actions take a whole list of
3979 message ids, which are known to continue up to the end of the arguments. Others
3980 take a single message id and then operate on the recipients list. */
3982 if (msg_action_arg > 0 && msg_action != MSG_DELIVER && msg_action != MSG_LOAD)
3984 int yield = EXIT_SUCCESS;
3985 set_process_info("acting on specified messages");
3987 if (!one_msg_action)
3989 for (i = msg_action_arg; i < argc; i++)
3990 if (!queue_action(argv[i], msg_action, NULL, 0, 0))
3991 yield = EXIT_FAILURE;
3994 else if (!queue_action(argv[msg_action_arg], msg_action, argv, argc,
3995 recipients_arg)) yield = EXIT_FAILURE;
3999 /* All the modes below here require the remaining configuration sections
4000 to be read, except that we can skip over the ACL setting when delivering
4001 specific messages, or doing a queue run. (For various testing cases we could
4002 skip too, but as they are rare, it doesn't really matter.) The argument is TRUE
4005 readconf_rest(msg_action_arg > 0 || (queue_interval == 0 && !daemon_listen));
4007 /* The configuration data will have been read into POOL_PERM because we won't
4008 ever want to reset back past it. Change the current pool to POOL_MAIN. In fact,
4009 this is just a bit of pedantic tidiness. It wouldn't really matter if the
4010 configuration were read into POOL_MAIN, because we don't do any resets till
4011 later on. However, it seems right, and it does ensure that both pools get used.
4014 store_pool = POOL_MAIN;
4016 /* Handle the -brt option. This is for checking out retry configurations.
4017 The next three arguments are a domain name or a complete address, and
4018 optionally two error numbers. All it does is to call the function that
4019 scans the retry configuration data. */
4021 if (test_retry_arg >= 0)
4023 retry_config *yield;
4024 int basic_errno = 0;
4028 if (test_retry_arg >= argc)
4030 printf("-brt needs a domain or address argument\n");
4031 exim_exit(EXIT_FAILURE);
4033 s1 = argv[test_retry_arg++];
4036 /* If the first argument contains no @ and no . it might be a local user
4037 or it might be a single-component name. Treat as a domain. */
4039 if (Ustrchr(s1, '@') == NULL && Ustrchr(s1, '.') == NULL)
4041 printf("Warning: \"%s\" contains no '@' and no '.' characters. It is "
4042 "being \ntreated as a one-component domain, not as a local part.\n\n",
4046 /* There may be an optional second domain arg. */
4048 if (test_retry_arg < argc && Ustrchr(argv[test_retry_arg], '.') != NULL)
4049 s2 = argv[test_retry_arg++];
4051 /* The final arg is an error name */
4053 if (test_retry_arg < argc)
4055 uschar *ss = argv[test_retry_arg];
4057 readconf_retry_error(ss, ss + Ustrlen(ss), &basic_errno, &more_errno);
4060 printf("%s\n", CS error);
4061 return EXIT_FAILURE;
4064 /* For the {MAIL,RCPT,DATA}_4xx errors, a value of 255 means "any", and a
4065 code > 100 as an error is for matching codes to the decade. Turn them into
4066 a real error code, off the decade. */
4068 if (basic_errno == ERRNO_MAIL4XX ||
4069 basic_errno == ERRNO_RCPT4XX ||
4070 basic_errno == ERRNO_DATA4XX)
4072 int code = (more_errno >> 8) & 255;
4074 more_errno = (more_errno & 0xffff00ff) | (21 << 8);
4075 else if (code > 100)
4076 more_errno = (more_errno & 0xffff00ff) | ((code - 96) << 8);
4080 yield = retry_find_config(s1, s2, basic_errno, more_errno);
4081 if (yield == NULL) printf("No retry information found\n"); else
4084 more_errno = yield->more_errno;
4085 printf("Retry rule: %s ", yield->pattern);
4087 if (yield->basic_errno == ERRNO_EXIMQUOTA)
4089 printf("quota%s%s ",
4090 (more_errno > 0)? "_" : "",
4091 (more_errno > 0)? readconf_printtime(more_errno) : US"");
4093 else if (yield->basic_errno == ECONNREFUSED)
4095 printf("refused%s%s ",
4096 (more_errno > 0)? "_" : "",
4097 (more_errno == 'M')? "MX" :
4098 (more_errno == 'A')? "A" : "");
4100 else if (yield->basic_errno == ETIMEDOUT)
4103 if ((more_errno & RTEF_CTOUT) != 0) printf("_connect");
4105 if (more_errno != 0) printf("_%s",
4106 (more_errno == 'M')? "MX" : "A");
4109 else if (yield->basic_errno == ERRNO_AUTHFAIL)
4110 printf("auth_failed ");
4113 for (r = yield->rules; r != NULL; r = r->next)
4115 printf("%c,%s", r->rule, readconf_printtime(r->timeout)); /* Do not */
4116 printf(",%s", readconf_printtime(r->p1)); /* amalgamate */
4122 printf(",%d.", x/1000);
4136 exim_exit(EXIT_SUCCESS);
4139 /* Handle a request to list one or more configuration options */
4143 set_process_info("listing variables");
4144 if (recipients_arg >= argc) readconf_print(US"all", NULL);
4145 else for (i = recipients_arg; i < argc; i++)
4148 (Ustrcmp(argv[i], "router") == 0 ||
4149 Ustrcmp(argv[i], "transport") == 0 ||
4150 Ustrcmp(argv[i], "authenticator") == 0 ||
4151 Ustrcmp(argv[i], "macro") == 0))
4153 readconf_print(argv[i+1], argv[i]);
4156 else readconf_print(argv[i], NULL);
4158 exim_exit(EXIT_SUCCESS);
4162 /* Handle a request to deliver one or more messages that are already on the
4163 queue. Values of msg_action other than MSG_DELIVER and MSG_LOAD are dealt with
4164 above. MSG_LOAD is handled with -be (which is the only time it applies) below.
4166 Delivery of specific messages is typically used for a small number when
4167 prodding by hand (when the option forced_delivery will be set) or when
4168 re-execing to regain root privilege. Each message delivery must happen in a
4169 separate process, so we fork a process for each one, and run them sequentially
4170 so that debugging output doesn't get intertwined, and to avoid spawning too
4171 many processes if a long list is given. However, don't fork for the last one;
4172 this saves a process in the common case when Exim is called to deliver just one
4175 if (msg_action_arg > 0 && msg_action != MSG_LOAD)
4177 if (prod_requires_admin && !admin_user)
4179 fprintf(stderr, "exim: Permission denied\n");
4180 exim_exit(EXIT_FAILURE);
4182 set_process_info("delivering specified messages");
4183 if (deliver_give_up) forced_delivery = deliver_force_thaw = TRUE;
4184 for (i = msg_action_arg; i < argc; i++)
4189 (void)deliver_message(argv[i], forced_delivery, deliver_give_up);
4190 else if ((pid = fork()) == 0)
4192 (void)deliver_message(argv[i], forced_delivery, deliver_give_up);
4193 _exit(EXIT_SUCCESS);
4197 fprintf(stderr, "failed to fork delivery process for %s: %s\n", argv[i],
4199 exim_exit(EXIT_FAILURE);
4203 exim_exit(EXIT_SUCCESS);
4207 /* If only a single queue run is requested, without SMTP listening, we can just
4208 turn into a queue runner, with an optional starting message id. */
4210 if (queue_interval == 0 && !daemon_listen)
4212 DEBUG(D_queue_run) debug_printf("Single queue run%s%s%s%s\n",
4213 (start_queue_run_id == NULL)? US"" : US" starting at ",
4214 (start_queue_run_id == NULL)? US"" : start_queue_run_id,
4215 (stop_queue_run_id == NULL)? US"" : US" stopping at ",
4216 (stop_queue_run_id == NULL)? US"" : stop_queue_run_id);
4217 set_process_info("running the queue (single queue run)");
4218 queue_run(start_queue_run_id, stop_queue_run_id, FALSE);
4219 exim_exit(EXIT_SUCCESS);
4223 /* Find the login name of the real user running this process. This is always
4224 needed when receiving a message, because it is written into the spool file. It
4225 may also be used to construct a from: or a sender: header, and in this case we
4226 need the user's full name as well, so save a copy of it, checked for RFC822
4227 syntax and munged if necessary, if it hasn't previously been set by the -F
4228 argument. We may try to get the passwd entry more than once, in case NIS or
4229 other delays are in evidence. Save the home directory for use in filter testing
4234 if ((pw = getpwuid(real_uid)) != NULL)
4236 originator_login = string_copy(US pw->pw_name);
4237 originator_home = string_copy(US pw->pw_dir);
4239 /* If user name has not been set by -F, set it from the passwd entry
4240 unless -f has been used to set the sender address by a trusted user. */
4242 if (originator_name == NULL)
4244 if (sender_address == NULL ||
4245 (!trusted_caller && filter_test == FTEST_NONE))
4247 uschar *name = US pw->pw_gecos;
4248 uschar *amp = Ustrchr(name, '&');
4251 /* Most Unix specify that a '&' character in the gecos field is
4252 replaced by a copy of the login name, and some even specify that
4253 the first character should be upper cased, so that's what we do. */
4258 string_format(buffer, sizeof(buffer), "%.*s%n%s%s",
4259 amp - name, name, &loffset, originator_login, amp + 1);
4260 buffer[loffset] = toupper(buffer[loffset]);
4264 /* If a pattern for matching the gecos field was supplied, apply
4265 it and then expand the name string. */
4267 if (gecos_pattern != NULL && gecos_name != NULL)
4270 re = regex_must_compile(gecos_pattern, FALSE, TRUE); /* Use malloc */
4272 if (regex_match_and_setup(re, name, 0, -1))
4274 uschar *new_name = expand_string(gecos_name);
4276 if (new_name != NULL)
4278 DEBUG(D_receive) debug_printf("user name \"%s\" extracted from "
4279 "gecos field \"%s\"\n", new_name, name);
4282 else DEBUG(D_receive) debug_printf("failed to expand gecos_name string "
4283 "\"%s\": %s\n", gecos_name, expand_string_message);
4285 else DEBUG(D_receive) debug_printf("gecos_pattern \"%s\" did not match "
4286 "gecos field \"%s\"\n", gecos_pattern, name);
4287 store_free((void *)re);
4289 originator_name = string_copy(name);
4292 /* A trusted caller has used -f but not -F */
4294 else originator_name = US"";
4297 /* Break the retry loop */
4302 if (++i > finduser_retries) break;
4306 /* If we cannot get a user login, log the incident and give up, unless the
4307 configuration specifies something to use. When running in the test harness,
4308 any setting of unknown_login overrides the actual name. */
4310 if (originator_login == NULL || running_in_test_harness)
4312 if (unknown_login != NULL)
4314 originator_login = expand_string(unknown_login);
4315 if (originator_name == NULL && unknown_username != NULL)
4316 originator_name = expand_string(unknown_username);
4317 if (originator_name == NULL) originator_name = US"";
4319 if (originator_login == NULL)
4320 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Failed to get user name for uid %d",
4324 /* Ensure that the user name is in a suitable form for use as a "phrase" in an
4327 originator_name = string_copy(parse_fix_phrase(originator_name,
4328 Ustrlen(originator_name), big_buffer, big_buffer_size));
4330 /* If a message is created by this call of Exim, the uid/gid of its originator
4331 are those of the caller. These values are overridden if an existing message is
4332 read in from the spool. */
4334 originator_uid = real_uid;
4335 originator_gid = real_gid;
4337 DEBUG(D_receive) debug_printf("originator: uid=%d gid=%d login=%s name=%s\n",
4338 (int)originator_uid, (int)originator_gid, originator_login, originator_name);
4340 /* Run in daemon and/or queue-running mode. The function daemon_go() never
4341 returns. We leave this till here so that the originator_ fields are available
4342 for incoming messages via the daemon. The daemon cannot be run in mua_wrapper
4345 if (daemon_listen || queue_interval > 0)
4349 fprintf(stderr, "Daemon cannot be run when mua_wrapper is set\n");
4350 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Daemon cannot be run when "
4351 "mua_wrapper is set");
4356 /* If the sender ident has not been set (by a trusted caller) set it to
4357 the caller. This will get overwritten below for an inetd call. If a trusted
4358 caller has set it empty, unset it. */
4360 if (sender_ident == NULL) sender_ident = originator_login;
4361 else if (sender_ident[0] == 0) sender_ident = NULL;
4363 /* Handle the -brw option, which is for checking out rewriting rules. Cause log
4364 writes (on errors) to go to stderr instead. Can't do this earlier, as want the
4365 originator_* variables set. */
4367 if (test_rewrite_arg >= 0)
4369 really_exim = FALSE;
4370 if (test_rewrite_arg >= argc)
4372 printf("-brw needs an address argument\n");
4373 exim_exit(EXIT_FAILURE);
4375 rewrite_test(argv[test_rewrite_arg]);
4376 exim_exit(EXIT_SUCCESS);
4379 /* A locally-supplied message is considered to be coming from a local user
4380 unless a trusted caller supplies a sender address with -f, or is passing in the
4381 message via SMTP (inetd invocation or otherwise). */
4383 if ((sender_address == NULL && !smtp_input) ||
4384 (!trusted_caller && filter_test == FTEST_NONE))
4386 sender_local = TRUE;
4388 /* A trusted caller can supply authenticated_sender and authenticated_id
4389 via -oMas and -oMai and if so, they will already be set. Otherwise, force
4390 defaults except when host checking. */
4392 if (authenticated_sender == NULL && !host_checking)
4393 authenticated_sender = string_sprintf("%s@%s", originator_login,
4394 qualify_domain_sender);
4395 if (authenticated_id == NULL && !host_checking)
4396 authenticated_id = originator_login;
4399 /* Trusted callers are always permitted to specify the sender address.
4400 Untrusted callers may specify it if it matches untrusted_set_sender, or if what
4401 is specified is the empty address. However, if a trusted caller does not
4402 specify a sender address for SMTP input, we leave sender_address unset. This
4403 causes the MAIL commands to be honoured. */
4405 if ((!smtp_input && sender_address == NULL) ||
4406 !receive_check_set_sender(sender_address))
4408 /* Either the caller is not permitted to set a general sender, or this is
4409 non-SMTP input and the trusted caller has not set a sender. If there is no
4410 sender, or if a sender other than <> is set, override with the originator's
4411 login (which will get qualified below), except when checking things. */
4413 if (sender_address == NULL /* No sender_address set */
4415 (sender_address[0] != 0 && /* Non-empty sender address, AND */
4416 !checking && /* Not running tests, AND */
4417 filter_test == FTEST_NONE)) /* Not testing a filter */
4419 sender_address = originator_login;
4420 sender_address_forced = FALSE;
4421 sender_address_domain = 0;
4425 /* Remember whether an untrusted caller set the sender address */
4427 sender_set_untrusted = sender_address != originator_login && !trusted_caller;
4429 /* Ensure that the sender address is fully qualified unless it is the empty
4430 address, which indicates an error message, or doesn't exist (root caller, smtp
4431 interface, no -f argument). */
4433 if (sender_address != NULL && sender_address[0] != 0 &&
4434 sender_address_domain == 0)
4435 sender_address = string_sprintf("%s@%s", local_part_quote(sender_address),
4436 qualify_domain_sender);
4438 DEBUG(D_receive) debug_printf("sender address = %s\n", sender_address);
4440 /* Handle a request to verify a list of addresses, or test them for delivery.
4441 This must follow the setting of the sender address, since routers can be
4442 predicated upon the sender. If no arguments are given, read addresses from
4443 stdin. Set debug_level to at least D_v to get full output for address testing.
4446 if (verify_address_mode || address_test_mode)
4449 int flags = vopt_qualify;
4451 if (verify_address_mode)
4453 if (!verify_as_sender) flags |= vopt_is_recipient;
4454 DEBUG(D_verify) debug_print_ids(US"Verifying:");
4459 flags |= vopt_is_recipient;
4460 debug_selector |= D_v;
4461 debug_file = stderr;
4462 debug_fd = fileno(debug_file);
4463 DEBUG(D_verify) debug_print_ids(US"Address testing:");
4466 if (recipients_arg < argc)
4468 while (recipients_arg < argc)
4470 uschar *s = argv[recipients_arg++];
4473 BOOL finished = FALSE;
4474 uschar *ss = parse_find_address_end(s, FALSE);
4475 if (*ss == ',') *ss = 0; else finished = TRUE;
4476 test_address(s, flags, &exit_value);
4479 while (*(++s) != 0 && (*s == ',' || isspace(*s)));
4486 uschar *s = get_stdinput(NULL, NULL);
4487 if (s == NULL) break;
4488 test_address(s, flags, &exit_value);
4492 exim_exit(exit_value);
4495 /* Handle expansion checking. Either expand items on the command line, or read
4496 from stdin if there aren't any. If -Mset was specified, load the message so
4497 that its variables can be used, but restrict this facility to admin users.
4498 Otherwise, if -bem was used, read a message from stdin. */
4502 if (msg_action_arg > 0 && msg_action == MSG_LOAD)
4504 uschar spoolname[256]; /* Not big_buffer; used in spool_read_header() */
4507 fprintf(stderr, "exim: permission denied\n");
4510 message_id = argv[msg_action_arg];
4511 (void)string_format(spoolname, sizeof(spoolname), "%s-H", message_id);
4512 if (!spool_open_datafile(message_id))
4513 printf ("Failed to load message datafile %s\n", message_id);
4514 if (spool_read_header(spoolname, TRUE, FALSE) != spool_read_OK)
4515 printf ("Failed to load message %s\n", message_id);
4518 /* Read a test message from a file. We fudge it up to be on stdin, saving
4519 stdin itself for later reading of expansion strings. */
4521 else if (expansion_test_message != NULL)
4523 int save_stdin = dup(0);
4524 int fd = Uopen(expansion_test_message, O_RDONLY, 0);
4527 fprintf(stderr, "exim: failed to open %s: %s\n", expansion_test_message,
4529 return EXIT_FAILURE;
4532 filter_test = FTEST_USER; /* Fudge to make it look like filter test */
4533 message_ended = END_NOTENDED;
4534 read_message_body(receive_msg(extract_recipients));
4535 message_linecount += body_linecount;
4536 (void)dup2(save_stdin, 0);
4537 (void)close(save_stdin);
4538 clearerr(stdin); /* Required by Darwin */
4541 /* Allow $recipients for this testing */
4543 enable_dollar_recipients = TRUE;
4545 /* Expand command line items */
4547 if (recipients_arg < argc)
4549 while (recipients_arg < argc)
4551 uschar *s = argv[recipients_arg++];
4552 uschar *ss = expand_string(s);
4553 if (ss == NULL) printf ("Failed: %s\n", expand_string_message);
4554 else printf("%s\n", CS ss);
4562 char *(*fn_readline)(const char *) = NULL;
4563 void (*fn_addhist)(const char *) = NULL;
4566 void *dlhandle = set_readline(&fn_readline, &fn_addhist);
4572 uschar *source = get_stdinput(fn_readline, fn_addhist);
4573 if (source == NULL) break;
4574 ss = expand_string(source);
4576 printf ("Failed: %s\n", expand_string_message);
4577 else printf("%s\n", CS ss);
4581 if (dlhandle != NULL) dlclose(dlhandle);
4585 /* The data file will be open after -Mset */
4587 if (deliver_datafile >= 0)
4589 (void)close(deliver_datafile);
4590 deliver_datafile = -1;
4593 exim_exit(EXIT_SUCCESS);
4597 /* The active host name is normally the primary host name, but it can be varied
4598 for hosts that want to play several parts at once. We need to ensure that it is
4599 set for host checking, and for receiving messages. */
4601 smtp_active_hostname = primary_hostname;
4602 if (raw_active_hostname != NULL)
4604 uschar *nah = expand_string(raw_active_hostname);
4607 if (!expand_string_forcedfail)
4608 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to expand \"%s\" "
4609 "(smtp_active_hostname): %s", raw_active_hostname,
4610 expand_string_message);
4612 else if (nah[0] != 0) smtp_active_hostname = nah;
4615 /* Handle host checking: this facility mocks up an incoming SMTP call from a
4616 given IP address so that the blocking and relay configuration can be tested.
4617 Unless a sender_ident was set by -oMt, we discard it (the default is the
4618 caller's login name). An RFC 1413 call is made only if we are running in the
4619 test harness and an incoming interface and both ports are specified, because
4620 there is no TCP/IP call to find the ident for. */
4627 if (!sender_ident_set)
4629 sender_ident = NULL;
4630 if (running_in_test_harness && sender_host_port != 0 &&
4631 interface_address != NULL && interface_port != 0)
4632 verify_get_ident(1413);
4635 /* In case the given address is a non-canonical IPv6 address, canonicize
4636 it. The code works for both IPv4 and IPv6, as it happens. */
4638 size = host_aton(sender_host_address, x);
4639 sender_host_address = store_get(48); /* large enough for full IPv6 */
4640 (void)host_nmtoa(size, x, -1, sender_host_address, ':');
4642 /* Now set up for testing */
4644 host_build_sender_fullhost();
4648 sender_local = FALSE;
4649 sender_host_notsocket = TRUE;
4650 debug_file = stderr;
4651 debug_fd = fileno(debug_file);
4652 fprintf(stdout, "\n**** SMTP testing session as if from host %s\n"
4653 "**** but without any ident (RFC 1413) callback.\n"
4654 "**** This is not for real!\n\n",
4655 sender_host_address);
4657 if (verify_check_host(&hosts_connection_nolog) == OK)
4658 log_write_selector &= ~L_smtp_connection;
4659 log_write(L_smtp_connection, LOG_MAIN, "%s", smtp_get_connection_info());
4661 /* NOTE: We do *not* call smtp_log_no_mail() if smtp_start_session() fails,
4662 because a log line has already been written for all its failure exists
4663 (usually "connection refused: <reason>") and writing another one is
4664 unnecessary clutter. */
4666 if (smtp_start_session())
4668 reset_point = store_get(0);
4671 store_reset(reset_point);
4672 if (smtp_setup_msg() <= 0) break;
4673 if (!receive_msg(FALSE)) break;
4677 exim_exit(EXIT_SUCCESS);
4681 /* Arrange for message reception if recipients or SMTP were specified;
4682 otherwise complain unless a version print (-bV) happened or this is a filter
4683 verification test. In the former case, show the configuration file name. */
4685 if (recipients_arg >= argc && !extract_recipients && !smtp_input)
4687 if (version_printed)
4689 printf("Configuration file is %s\n", config_main_filename);
4690 return EXIT_SUCCESS;
4693 if (filter_test == FTEST_NONE)
4694 exim_usage(called_as);
4698 /* If mua_wrapper is set, Exim is being used to turn an MUA that submits on the
4699 standard input into an MUA that submits to a smarthost over TCP/IP. We know
4700 that we are not called from inetd, because that is rejected above. The
4701 following configuration settings are forced here:
4703 (1) Synchronous delivery (-odi)
4704 (2) Errors to stderr (-oep == -oeq)
4705 (3) No parallel remote delivery
4706 (4) Unprivileged delivery
4708 We don't force overall queueing options because there are several of them;
4709 instead, queueing is avoided below when mua_wrapper is set. However, we do need
4710 to override any SMTP queueing. */
4714 synchronous_delivery = TRUE;
4715 arg_error_handling = ERRORS_STDERR;
4716 remote_max_parallel = 1;
4717 deliver_drop_privilege = TRUE;
4719 queue_smtp_domains = NULL;
4723 /* Prepare to accept one or more new messages on the standard input. When a
4724 message has been read, its id is returned in message_id[]. If doing immediate
4725 delivery, we fork a delivery process for each received message, except for the
4726 last one, where we can save a process switch.
4728 It is only in non-smtp mode that error_handling is allowed to be changed from
4729 its default of ERRORS_SENDER by argument. (Idle thought: are any of the
4730 sendmail error modes other than -oem ever actually used? Later: yes.) */
4732 if (!smtp_input) error_handling = arg_error_handling;
4734 /* If this is an inetd call, ensure that stderr is closed to prevent panic
4735 logging being sent down the socket and make an identd call to get the
4740 (void)fclose(stderr);
4741 exim_nullstd(); /* Re-open to /dev/null */
4742 verify_get_ident(IDENT_PORT);
4743 host_build_sender_fullhost();
4744 set_process_info("handling incoming connection from %s via inetd",
4748 /* If the sender host address has been set, build sender_fullhost if it hasn't
4749 already been done (which it will have been for inetd). This caters for the
4750 case when it is forced by -oMa. However, we must flag that it isn't a socket,
4751 so that the test for IP options is skipped for -bs input. */
4753 if (sender_host_address != NULL && sender_fullhost == NULL)
4755 host_build_sender_fullhost();
4756 set_process_info("handling incoming connection from %s via -oMa",
4758 sender_host_notsocket = TRUE;
4761 /* Otherwise, set the sender host as unknown except for inetd calls. This
4762 prevents host checking in the case of -bs not from inetd and also for -bS. */
4764 else if (!is_inetd) sender_host_unknown = TRUE;
4766 /* If stdout does not exist, then dup stdin to stdout. This can happen
4767 if exim is started from inetd. In this case fd 0 will be set to the socket,
4768 but fd 1 will not be set. This also happens for passed SMTP channels. */
4770 if (fstat(1, &statbuf) < 0) (void)dup2(0, 1);
4772 /* Set up the incoming protocol name and the state of the program. Root is
4773 allowed to force received protocol via the -oMr option above. If we have come
4774 via inetd, the process info has already been set up. We don't set
4775 received_protocol here for smtp input, as it varies according to
4776 batch/HELO/EHLO/AUTH/TLS. */
4780 if (!is_inetd) set_process_info("accepting a local %sSMTP message from <%s>",
4781 smtp_batched_input? "batched " : "",
4782 (sender_address!= NULL)? sender_address : originator_login);
4786 if (received_protocol == NULL)
4787 received_protocol = string_sprintf("local%s", called_as);
4788 set_process_info("accepting a local non-SMTP message from <%s>",
4792 /* Initialize the session_local_queue-only flag (this will be ignored if
4793 mua_wrapper is set) */
4796 session_local_queue_only = queue_only;
4798 /* For non-SMTP and for batched SMTP input, check that there is enough space on
4799 the spool if so configured. On failure, we must not attempt to send an error
4800 message! (For interactive SMTP, the check happens at MAIL FROM and an SMTP
4801 error code is given.) */
4803 if ((!smtp_input || smtp_batched_input) && !receive_check_fs(0))
4805 fprintf(stderr, "exim: insufficient disk space\n");
4806 return EXIT_FAILURE;
4809 /* If this is smtp input of any kind, real or batched, handle the start of the
4812 NOTE: We do *not* call smtp_log_no_mail() if smtp_start_session() fails,
4813 because a log line has already been written for all its failure exists
4814 (usually "connection refused: <reason>") and writing another one is
4815 unnecessary clutter. */
4821 if (verify_check_host(&hosts_connection_nolog) == OK)
4822 log_write_selector &= ~L_smtp_connection;
4823 log_write(L_smtp_connection, LOG_MAIN, "%s", smtp_get_connection_info());
4824 if (!smtp_start_session())
4827 exim_exit(EXIT_SUCCESS);
4831 /* Otherwise, set up the input size limit here. */
4835 thismessage_size_limit = expand_string_integer(message_size_limit, TRUE);
4836 if (expand_string_message != NULL)
4838 if (thismessage_size_limit == -1)
4839 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to expand "
4840 "message_size_limit: %s", expand_string_message);
4842 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "invalid value for "
4843 "message_size_limit: %s", expand_string_message);
4847 /* Loop for several messages when reading SMTP input. If we fork any child
4848 processes, we don't want to wait for them unless synchronous delivery is
4849 requested, so set SIGCHLD to SIG_IGN in that case. This is not necessarily the
4850 same as SIG_DFL, despite the fact that documentation often lists the default as
4851 "ignore". This is a confusing area. This is what I know:
4853 At least on some systems (e.g. Solaris), just setting SIG_IGN causes child
4854 processes that complete simply to go away without ever becoming defunct. You
4855 can't then wait for them - but we don't want to wait for them in the
4856 non-synchronous delivery case. However, this behaviour of SIG_IGN doesn't
4857 happen for all OS (e.g. *BSD is different).
4859 But that's not the end of the story. Some (many? all?) systems have the
4860 SA_NOCLDWAIT option for sigaction(). This requests the behaviour that Solaris
4861 has by default, so it seems that the difference is merely one of default
4862 (compare restarting vs non-restarting signals).
4864 To cover all cases, Exim sets SIG_IGN with SA_NOCLDWAIT here if it can. If not,
4865 it just sets SIG_IGN. To be on the safe side it also calls waitpid() at the end
4866 of the loop below. Paranoia rules.
4868 February 2003: That's *still* not the end of the story. There are now versions
4869 of Linux (where SIG_IGN does work) that are picky. If, having set SIG_IGN, a
4870 process then calls waitpid(), a grumble is written to the system log, because
4871 this is logically inconsistent. In other words, it doesn't like the paranoia.
4872 As a consequenc of this, the waitpid() below is now excluded if we are sure
4873 that SIG_IGN works. */
4875 if (!synchronous_delivery)
4878 struct sigaction act;
4879 act.sa_handler = SIG_IGN;
4880 sigemptyset(&(act.sa_mask));
4881 act.sa_flags = SA_NOCLDWAIT;
4882 sigaction(SIGCHLD, &act, NULL);
4884 signal(SIGCHLD, SIG_IGN);
4888 /* Save the current store pool point, for resetting at the start of
4889 each message, and save the real sender address, if any. */
4891 reset_point = store_get(0);
4892 real_sender_address = sender_address;
4894 /* Loop to receive messages; receive_msg() returns TRUE if there are more
4895 messages to be read (SMTP input), or FALSE otherwise (not SMTP, or SMTP channel
4900 store_reset(reset_point);
4903 /* Handle the SMTP case; call smtp_setup_mst() to deal with the initial SMTP
4904 input and build the recipients list, before calling receive_msg() to read the
4905 message proper. Whatever sender address is given in the SMTP transaction is
4906 often ignored for local senders - we use the actual sender, which is normally
4907 either the underlying user running this process or a -f argument provided by
4908 a trusted caller. It is saved in real_sender_address. The test for whether to
4909 accept the SMTP sender is encapsulated in receive_check_set_sender(). */
4914 if ((rc = smtp_setup_msg()) > 0)
4916 if (real_sender_address != NULL &&
4917 !receive_check_set_sender(sender_address))
4919 sender_address = raw_sender = real_sender_address;
4920 sender_address_unrewritten = NULL;
4923 /* For batched SMTP, we have to run the acl_not_smtp_start ACL, since it
4924 isn't really SMTP, so no other ACL will run until the acl_not_smtp one at
4925 the very end. The result of the ACL is ignored (as for other non-SMTP
4926 messages). It is run for its potential side effects. */
4928 if (smtp_batched_input && acl_not_smtp_start != NULL)
4930 uschar *user_msg, *log_msg;
4931 enable_dollar_recipients = TRUE;
4932 (void)acl_check(ACL_WHERE_NOTSMTP_START, NULL, acl_not_smtp_start,
4933 &user_msg, &log_msg);
4934 enable_dollar_recipients = FALSE;
4937 /* Now get the data for the message */
4939 more = receive_msg(extract_recipients);
4940 if (message_id[0] == 0)
4943 smtp_log_no_mail(); /* Log no mail if configured */
4944 exim_exit(EXIT_FAILURE);
4949 smtp_log_no_mail(); /* Log no mail if configured */
4950 exim_exit((rc == 0)? EXIT_SUCCESS : EXIT_FAILURE);
4954 /* In the non-SMTP case, we have all the information from the command
4955 line, but must process it in case it is in the more general RFC822
4956 format, and in any case, to detect syntax errors. Also, it appears that
4957 the use of comma-separated lists as single arguments is common, so we
4958 had better support them. */
4964 int count = argc - recipients_arg;
4965 uschar **list = argv + recipients_arg;
4967 /* These options cannot be changed dynamically for non-SMTP messages */
4969 active_local_sender_retain = local_sender_retain;
4970 active_local_from_check = local_from_check;
4972 /* Save before any rewriting */
4974 raw_sender = string_copy(sender_address);
4976 /* Loop for each argument */
4978 for (i = 0; i < count; i++)
4980 int start, end, domain;
4982 uschar *s = list[i];
4984 /* Loop for each comma-separated address */
4988 BOOL finished = FALSE;
4990 uschar *ss = parse_find_address_end(s, FALSE);
4992 if (*ss == ',') *ss = 0; else finished = TRUE;
4994 /* Check max recipients - if -t was used, these aren't recipients */
4996 if (recipients_max > 0 && ++rcount > recipients_max &&
4997 !extract_recipients)
4999 if (error_handling == ERRORS_STDERR)
5001 fprintf(stderr, "exim: too many recipients\n");
5002 exim_exit(EXIT_FAILURE);
5007 moan_to_sender(ERRMESS_TOOMANYRECIP, NULL, NULL, stdin, TRUE)?
5008 errors_sender_rc : EXIT_FAILURE;
5013 parse_extract_address(s, &errmess, &start, &end, &domain, FALSE);
5015 if (domain == 0 && !allow_unqualified_recipient)
5018 errmess = US"unqualified recipient address not allowed";
5021 if (recipient == NULL)
5023 if (error_handling == ERRORS_STDERR)
5025 fprintf(stderr, "exim: bad recipient address \"%s\": %s\n",
5026 string_printing(list[i]), errmess);
5027 exim_exit(EXIT_FAILURE);
5033 eblock.text1 = string_printing(list[i]);
5034 eblock.text2 = errmess;
5036 moan_to_sender(ERRMESS_BADARGADDRESS, &eblock, NULL, stdin, TRUE)?
5037 errors_sender_rc : EXIT_FAILURE;
5041 receive_add_recipient(recipient, -1);
5044 while (*(++s) != 0 && (*s == ',' || isspace(*s)));
5048 /* Show the recipients when debugging */
5053 if (sender_address != NULL) debug_printf("Sender: %s\n", sender_address);
5054 if (recipients_list != NULL)
5056 debug_printf("Recipients:\n");
5057 for (i = 0; i < recipients_count; i++)
5058 debug_printf(" %s\n", recipients_list[i].address);
5062 /* Run the acl_not_smtp_start ACL if required. The result of the ACL is
5063 ignored; rejecting here would just add complication, and it can just as
5064 well be done later. Allow $recipients to be visible in the ACL. */
5066 if (acl_not_smtp_start != NULL)
5068 uschar *user_msg, *log_msg;
5069 enable_dollar_recipients = TRUE;
5070 (void)acl_check(ACL_WHERE_NOTSMTP_START, NULL, acl_not_smtp_start,
5071 &user_msg, &log_msg);
5072 enable_dollar_recipients = FALSE;
5075 /* Read the data for the message. If filter_test is not FTEST_NONE, this
5076 will just read the headers for the message, and not write anything onto the
5079 message_ended = END_NOTENDED;
5080 more = receive_msg(extract_recipients);
5082 /* more is always FALSE here (not SMTP message) when reading a message
5083 for real; when reading the headers of a message for filter testing,
5084 it is TRUE if the headers were terminated by '.' and FALSE otherwise. */
5086 if (message_id[0] == 0) exim_exit(EXIT_FAILURE);
5087 } /* Non-SMTP message reception */
5089 /* If this is a filter testing run, there are headers in store, but
5090 no message on the spool. Run the filtering code in testing mode, setting
5091 the domain to the qualify domain and the local part to the current user,
5092 unless they have been set by options. The prefix and suffix are left unset
5093 unless specified. The the return path is set to to the sender unless it has
5094 already been set from a return-path header in the message. */
5096 if (filter_test != FTEST_NONE)
5098 deliver_domain = (ftest_domain != NULL)?
5099 ftest_domain : qualify_domain_recipient;
5100 deliver_domain_orig = deliver_domain;
5101 deliver_localpart = (ftest_localpart != NULL)?
5102 ftest_localpart : originator_login;
5103 deliver_localpart_orig = deliver_localpart;
5104 deliver_localpart_prefix = ftest_prefix;
5105 deliver_localpart_suffix = ftest_suffix;
5106 deliver_home = originator_home;
5108 if (return_path == NULL)
5110 printf("Return-path copied from sender\n");
5111 return_path = string_copy(sender_address);
5115 printf("Return-path = %s\n", (return_path[0] == 0)? US"<>" : return_path);
5117 printf("Sender = %s\n", (sender_address[0] == 0)? US"<>" : sender_address);
5119 receive_add_recipient(
5120 string_sprintf("%s%s%s@%s",
5121 (ftest_prefix == NULL)? US"" : ftest_prefix,
5123 (ftest_suffix == NULL)? US"" : ftest_suffix,
5124 deliver_domain), -1);
5126 printf("Recipient = %s\n", recipients_list[0].address);
5127 if (ftest_prefix != NULL) printf("Prefix = %s\n", ftest_prefix);
5128 if (ftest_suffix != NULL) printf("Suffix = %s\n", ftest_suffix);
5130 (void)chdir("/"); /* Get away from wherever the user is running this from */
5132 /* Now we run either a system filter test, or a user filter test, or both.
5133 In the latter case, headers added by the system filter will persist and be
5134 available to the user filter. We need to copy the filter variables
5137 if ((filter_test & FTEST_SYSTEM) != 0)
5139 if (!filter_runtest(filter_sfd, filter_test_sfile, TRUE, more))
5140 exim_exit(EXIT_FAILURE);
5143 memcpy(filter_sn, filter_n, sizeof(filter_sn));
5145 if ((filter_test & FTEST_USER) != 0)
5147 if (!filter_runtest(filter_ufd, filter_test_ufile, FALSE, more))
5148 exim_exit(EXIT_FAILURE);
5151 exim_exit(EXIT_SUCCESS);
5154 /* Else act on the result of message reception. We should not get here unless
5155 message_id[0] is non-zero. If queue_only is set, session_local_queue_only
5156 will be TRUE. If it is not, check on the number of messages received in this
5159 if (!session_local_queue_only &&
5160 smtp_accept_queue_per_connection > 0 &&
5161 receive_messagecount > smtp_accept_queue_per_connection)
5163 session_local_queue_only = TRUE;
5164 queue_only_reason = 2;
5167 /* Initialize local_queue_only from session_local_queue_only. If it is false,
5168 and queue_only_load is set, check that the load average is below it. If it is
5169 not, set local_queue_only TRUE. If queue_only_load_latch is true (the
5170 default), we put the whole session into queue_only mode. It then remains this
5171 way for any subsequent messages on the same SMTP connection. This is a
5172 deliberate choice; even though the load average may fall, it doesn't seem
5173 right to deliver later messages on the same call when not delivering earlier
5174 ones. However, there are odd cases where this is not wanted, so this can be
5175 changed by setting queue_only_load_latch false. */
5177 local_queue_only = session_local_queue_only;
5178 if (!local_queue_only && queue_only_load >= 0)
5180 local_queue_only = (load_average = OS_GETLOADAVG()) > queue_only_load;
5181 if (local_queue_only)
5183 queue_only_reason = 3;
5184 if (queue_only_load_latch) session_local_queue_only = TRUE;
5188 /* If running as an MUA wrapper, all queueing options and freezing options
5192 local_queue_only = queue_only_policy = deliver_freeze = FALSE;
5194 /* Log the queueing here, when it will get a message id attached, but
5195 not if queue_only is set (case 0). Case 1 doesn't happen here (too many
5198 if (local_queue_only) switch(queue_only_reason)
5201 log_write(L_delay_delivery,
5202 LOG_MAIN, "no immediate delivery: more than %d messages "
5203 "received in one connection", smtp_accept_queue_per_connection);
5207 log_write(L_delay_delivery,
5208 LOG_MAIN, "no immediate delivery: load average %.2f",
5209 (double)load_average/1000.0);
5213 /* Else do the delivery unless the ACL or local_scan() called for queue only
5214 or froze the message. Always deliver in a separate process. A fork failure is
5215 not a disaster, as the delivery will eventually happen on a subsequent queue
5216 run. The search cache must be tidied before the fork, as the parent will
5217 do it before exiting. The child will trigger a lookup failure and
5218 thereby defer the delivery if it tries to use (for example) a cached ldap
5219 connection that the parent has called unbind on. */
5221 else if (!queue_only_policy && !deliver_freeze)
5226 if ((pid = fork()) == 0)
5229 close_unwanted(); /* Close unwanted file descriptors and TLS */
5230 exim_nullstd(); /* Ensure std{in,out,err} exist */
5232 /* Re-exec Exim if we need to regain privilege (note: in mua_wrapper
5233 mode, deliver_drop_privilege is forced TRUE). */
5235 if (geteuid() != root_uid && !deliver_drop_privilege && !unprivileged)
5237 (void)child_exec_exim(CEE_EXEC_EXIT, FALSE, NULL, FALSE, 2, US"-Mc",
5239 /* Control does not return here. */
5242 /* No need to re-exec */
5244 rc = deliver_message(message_id, FALSE, FALSE);
5246 _exit((!mua_wrapper || rc == DELIVER_MUA_SUCCEEDED)?
5247 EXIT_SUCCESS : EXIT_FAILURE);
5252 log_write(0, LOG_MAIN|LOG_PANIC, "failed to fork automatic delivery "
5253 "process: %s", strerror(errno));
5256 /* In the parent, wait if synchronous delivery is required. This will
5257 always be the case in MUA wrapper mode. */
5259 else if (synchronous_delivery)
5262 while (wait(&status) != pid);
5263 if ((status & 0x00ff) != 0)
5264 log_write(0, LOG_MAIN|LOG_PANIC,
5265 "process %d crashed with signal %d while delivering %s",
5266 (int)pid, status & 0x00ff, message_id);
5267 if (mua_wrapper && (status & 0xffff) != 0) exim_exit(EXIT_FAILURE);
5271 /* The loop will repeat if more is TRUE. If we do not know know that the OS
5272 automatically reaps children (see comments above the loop), clear away any
5273 finished subprocesses here, in case there are lots of messages coming in
5274 from the same source. */
5276 #ifndef SIG_IGN_WORKS
5277 while (waitpid(-1, NULL, WNOHANG) > 0);
5281 exim_exit(EXIT_SUCCESS); /* Never returns */
5282 return 0; /* To stop compiler warning */