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 /* clang defines __GNUC__ (at least, for me) so test for it first */
930 #if defined(__clang__)
931 fprintf(f, "Compiler: CLang [%s]\n", __clang_version__);
932 #elif defined(__GNUC__)
933 fprintf(f, "Compiler: GCC [%s]\n",
937 "? unknown version ?"
941 fprintf(f, "Compiler: <unknown>\n");
944 #ifdef AUTH_CYRUS_SASL
945 auth_cyrus_sasl_version_report(f);
948 fprintf(f, "Library version: PCRE: Compile: %d.%d%s\n"
950 PCRE_MAJOR, PCRE_MINOR,
951 /* PRE_PRERELEASE is either defined and empty or a string.
952 * unless its an ancient version of PCRE in which case it
954 #ifdef PCRE_PRERELEASE
962 for (i = 0; i < lookup_list_count; i++)
964 if (lookup_list[i]->version_report)
965 lookup_list[i]->version_report(f);
968 #ifdef WHITELIST_D_MACROS
969 fprintf(f, "WHITELIST_D_MACROS: \"%s\"\n", WHITELIST_D_MACROS);
971 fprintf(f, "WHITELIST_D_MACROS unset\n");
973 #ifdef TRUSTED_CONFIG_LIST
974 fprintf(f, "TRUSTED_CONFIG_LIST: \"%s\"\n", TRUSTED_CONFIG_LIST);
976 fprintf(f, "TRUSTED_CONFIG_LIST unset\n");
985 /*************************************************
986 * Quote a local part *
987 *************************************************/
989 /* This function is used when a sender address or a From: or Sender: header
990 line is being created from the caller's login, or from an authenticated_id. It
991 applies appropriate quoting rules for a local part.
993 Argument: the local part
994 Returns: the local part, quoted if necessary
998 local_part_quote(uschar *lpart)
1000 BOOL needs_quote = FALSE;
1005 for (t = lpart; !needs_quote && *t != 0; t++)
1007 needs_quote = !isalnum(*t) && strchr("!#$%&'*+-/=?^_`{|}~", *t) == NULL &&
1008 (*t != '.' || t == lpart || t[1] == 0);
1011 if (!needs_quote) return lpart;
1014 yield = string_cat(NULL, &size, &ptr, US"\"", 1);
1018 uschar *nq = US Ustrpbrk(lpart, "\\\"");
1021 yield = string_cat(yield, &size, &ptr, lpart, Ustrlen(lpart));
1024 yield = string_cat(yield, &size, &ptr, lpart, nq - lpart);
1025 yield = string_cat(yield, &size, &ptr, US"\\", 1);
1026 yield = string_cat(yield, &size, &ptr, nq, 1);
1030 yield = string_cat(yield, &size, &ptr, US"\"", 1);
1038 /*************************************************
1039 * Load readline() functions *
1040 *************************************************/
1042 /* This function is called from testing executions that read data from stdin,
1043 but only when running as the calling user. Currently, only -be does this. The
1044 function loads the readline() function library and passes back the functions.
1045 On some systems, it needs the curses library, so load that too, but try without
1046 it if loading fails. All this functionality has to be requested at build time.
1049 fn_readline_ptr pointer to where to put the readline pointer
1050 fn_addhist_ptr pointer to where to put the addhistory function
1052 Returns: the dlopen handle or NULL on failure
1056 set_readline(char * (**fn_readline_ptr)(const char *),
1057 void (**fn_addhist_ptr)(const char *))
1060 void *dlhandle_curses = dlopen("libcurses.so", RTLD_GLOBAL|RTLD_LAZY);
1062 dlhandle = dlopen("libreadline.so", RTLD_GLOBAL|RTLD_NOW);
1063 if (dlhandle_curses != NULL) dlclose(dlhandle_curses);
1065 if (dlhandle != NULL)
1067 /* Checked manual pages; at least in GNU Readline 6.1, the prototypes are:
1068 * char * readline (const char *prompt);
1069 * void add_history (const char *string);
1071 *fn_readline_ptr = (char *(*)(const char*))dlsym(dlhandle, "readline");
1072 *fn_addhist_ptr = (void(*)(const char*))dlsym(dlhandle, "add_history");
1076 DEBUG(D_any) debug_printf("failed to load readline: %s\n", dlerror());
1085 /*************************************************
1086 * Get a line from stdin for testing things *
1087 *************************************************/
1089 /* This function is called when running tests that can take a number of lines
1090 of input (for example, -be and -bt). It handles continuations and trailing
1091 spaces. And prompting and a blank line output on eof. If readline() is in use,
1092 the arguments are non-NULL and provide the relevant functions.
1095 fn_readline readline function or NULL
1096 fn_addhist addhist function or NULL
1098 Returns: pointer to dynamic memory, or NULL at end of file
1102 get_stdinput(char *(*fn_readline)(const char *), void(*fn_addhist)(const char *))
1107 uschar *yield = NULL;
1109 if (fn_readline == NULL) { printf("> "); fflush(stdout); }
1113 uschar buffer[1024];
1117 char *readline_line = NULL;
1118 if (fn_readline != NULL)
1120 if ((readline_line = fn_readline((i > 0)? "":"> ")) == NULL) break;
1121 if (*readline_line != 0 && fn_addhist != NULL) fn_addhist(readline_line);
1122 p = US readline_line;
1127 /* readline() not in use */
1130 if (Ufgets(buffer, sizeof(buffer), stdin) == NULL) break;
1134 /* Handle the line */
1136 ss = p + (int)Ustrlen(p);
1137 while (ss > p && isspace(ss[-1])) ss--;
1141 while (p < ss && isspace(*p)) p++; /* leading space after cont */
1144 yield = string_cat(yield, &size, &ptr, p, ss - p);
1147 if (fn_readline != NULL) free(readline_line);
1150 if (ss == p || yield[ptr-1] != '\\')
1158 if (yield == NULL) printf("\n");
1164 /*************************************************
1165 * Output usage information for the program *
1166 *************************************************/
1168 /* This function is called when there are no recipients
1169 or a specific --help argument was added.
1172 progname information on what name we were called by
1174 Returns: DOES NOT RETURN
1178 exim_usage(uschar *progname)
1181 /* Handle specific program invocation varients */
1182 if (Ustrcmp(progname, US"-mailq") == 0)
1185 "mailq - list the contents of the mail queue\n\n"
1186 "For a list of options, see the Exim documentation.\n");
1190 /* Generic usage - we output this whatever happens */
1192 "Exim is a Mail Transfer Agent. It is normally called by Mail User Agents,\n"
1193 "not directly from a shell command line. Options and/or arguments control\n"
1194 "what it does when called. For a list of options, see the Exim documentation.\n");
1201 /*************************************************
1202 * Validate that the macros given are okay *
1203 *************************************************/
1205 /* Typically, Exim will drop privileges if macros are supplied. In some
1206 cases, we want to not do so.
1208 Arguments: none (macros is a global)
1209 Returns: true if trusted, false otherwise
1213 macros_trusted(void)
1215 #ifdef WHITELIST_D_MACROS
1217 uschar *whitelisted, *end, *p, **whites, **w;
1218 int white_count, i, n;
1220 BOOL prev_char_item, found;
1225 #ifndef WHITELIST_D_MACROS
1229 /* We only trust -D overrides for some invoking users:
1230 root, the exim run-time user, the optional config owner user.
1231 I don't know why config-owner would be needed, but since they can own the
1232 config files anyway, there's no security risk to letting them override -D. */
1233 if ( ! ((real_uid == root_uid)
1234 || (real_uid == exim_uid)
1235 #ifdef CONFIGURE_OWNER
1236 || (real_uid == config_uid)
1240 debug_printf("macros_trusted rejecting macros for uid %d\n", (int) real_uid);
1244 /* Get a list of macros which are whitelisted */
1245 whitelisted = string_copy_malloc(US WHITELIST_D_MACROS);
1246 prev_char_item = FALSE;
1248 for (p = whitelisted; *p != '\0'; ++p)
1250 if (*p == ':' || isspace(*p))
1255 prev_char_item = FALSE;
1258 if (!prev_char_item)
1259 prev_char_item = TRUE;
1266 whites = store_malloc(sizeof(uschar *) * (white_count+1));
1267 for (p = whitelisted, i = 0; (p != end) && (i < white_count); ++p)
1272 if (i == white_count)
1274 while (*p != '\0' && p < end)
1280 /* The list of macros should be very short. Accept the N*M complexity. */
1281 for (m = macros; m != NULL; m = m->next)
1284 for (w = whites; *w; ++w)
1285 if (Ustrcmp(*w, m->name) == 0)
1292 if (m->replacement == NULL)
1294 len = Ustrlen(m->replacement);
1297 n = pcre_exec(regex_whitelisted_macro, NULL, CS m->replacement, len,
1298 0, PCRE_EOPT, NULL, 0);
1301 if (n != PCRE_ERROR_NOMATCH)
1302 debug_printf("macros_trusted checking %s returned %d\n", m->name, n);
1306 DEBUG(D_any) debug_printf("macros_trusted overriden to true by whitelisting\n");
1312 /*************************************************
1313 * Entry point and high-level code *
1314 *************************************************/
1316 /* Entry point for the Exim mailer. Analyse the arguments and arrange to take
1317 the appropriate action. All the necessary functions are present in the one
1318 binary. I originally thought one should split it up, but it turns out that so
1319 much of the apparatus is needed in each chunk that one might as well just have
1320 it all available all the time, which then makes the coding easier as well.
1323 argc count of entries in argv
1324 argv argument strings, with argv[0] being the program name
1326 Returns: EXIT_SUCCESS if terminated successfully
1327 EXIT_FAILURE otherwise, except when a message has been sent
1328 to the sender, and -oee was given
1332 main(int argc, char **cargv)
1334 uschar **argv = USS cargv;
1335 int arg_receive_timeout = -1;
1336 int arg_smtp_receive_timeout = -1;
1337 int arg_error_handling = error_handling;
1338 int filter_sfd = -1;
1339 int filter_ufd = -1;
1342 int list_queue_option = 0;
1344 int msg_action_arg = -1;
1345 int namelen = (argv[0] == NULL)? 0 : Ustrlen(argv[0]);
1346 int queue_only_reason = 0;
1348 int perl_start_option = 0;
1350 int recipients_arg = argc;
1351 int sender_address_domain = 0;
1352 int test_retry_arg = -1;
1353 int test_rewrite_arg = -1;
1354 BOOL arg_queue_only = FALSE;
1355 BOOL bi_option = FALSE;
1356 BOOL checking = FALSE;
1357 BOOL count_queue = FALSE;
1358 BOOL expansion_test = FALSE;
1359 BOOL extract_recipients = FALSE;
1360 BOOL forced_delivery = FALSE;
1361 BOOL f_end_dot = FALSE;
1362 BOOL deliver_give_up = FALSE;
1363 BOOL list_queue = FALSE;
1364 BOOL list_options = FALSE;
1365 BOOL local_queue_only;
1367 BOOL one_msg_action = FALSE;
1368 BOOL queue_only_set = FALSE;
1369 BOOL receiving_message = TRUE;
1370 BOOL sender_ident_set = FALSE;
1371 BOOL session_local_queue_only;
1373 BOOL removed_privilege = FALSE;
1374 BOOL usage_wanted = FALSE;
1375 BOOL verify_address_mode = FALSE;
1376 BOOL verify_as_sender = FALSE;
1377 BOOL version_printed = FALSE;
1378 uschar *alias_arg = NULL;
1379 uschar *called_as = US"";
1380 uschar *start_queue_run_id = NULL;
1381 uschar *stop_queue_run_id = NULL;
1382 uschar *expansion_test_message = NULL;
1383 uschar *ftest_domain = NULL;
1384 uschar *ftest_localpart = NULL;
1385 uschar *ftest_prefix = NULL;
1386 uschar *ftest_suffix = NULL;
1387 uschar *malware_test_file = NULL;
1388 uschar *real_sender_address;
1389 uschar *originator_home = US"/";
1393 struct stat statbuf;
1394 pid_t passed_qr_pid = (pid_t)0;
1395 int passed_qr_pipe = -1;
1396 gid_t group_list[NGROUPS_MAX];
1398 /* Possible options for -R and -S */
1400 static uschar *rsopts[] = { US"f", US"ff", US"r", US"rf", US"rff" };
1402 /* Need to define this in case we need to change the environment in order
1403 to get rid of a bogus time zone. We have to make it char rather than uschar
1404 because some OS define it in /usr/include/unistd.h. */
1406 extern char **environ;
1408 /* If the Exim user and/or group and/or the configuration file owner/group were
1409 defined by ref:name at build time, we must now find the actual uid/gid values.
1410 This is a feature to make the lives of binary distributors easier. */
1412 #ifdef EXIM_USERNAME
1413 if (route_finduser(US EXIM_USERNAME, &pw, &exim_uid))
1417 fprintf(stderr, "exim: refusing to run with uid 0 for \"%s\"\n",
1421 exim_gid = pw->pw_gid;
1425 fprintf(stderr, "exim: failed to find uid for user name \"%s\"\n",
1431 #ifdef EXIM_GROUPNAME
1432 if (!route_findgroup(US EXIM_GROUPNAME, &exim_gid))
1434 fprintf(stderr, "exim: failed to find gid for group name \"%s\"\n",
1440 #ifdef CONFIGURE_OWNERNAME
1441 if (!route_finduser(US CONFIGURE_OWNERNAME, NULL, &config_uid))
1443 fprintf(stderr, "exim: failed to find uid for user name \"%s\"\n",
1444 CONFIGURE_OWNERNAME);
1449 /* We default the system_filter_user to be the Exim run-time user, as a
1450 sane non-root value. */
1451 system_filter_uid = exim_uid;
1453 #ifdef CONFIGURE_GROUPNAME
1454 if (!route_findgroup(US CONFIGURE_GROUPNAME, &config_gid))
1456 fprintf(stderr, "exim: failed to find gid for group name \"%s\"\n",
1457 CONFIGURE_GROUPNAME);
1462 /* In the Cygwin environment, some initialization needs doing. It is fudged
1463 in by means of this macro. */
1469 /* Check a field which is patched when we are running Exim within its
1470 testing harness; do a fast initial check, and then the whole thing. */
1472 running_in_test_harness =
1473 *running_status == '<' && Ustrcmp(running_status, "<<<testing>>>") == 0;
1475 /* The C standard says that the equivalent of setlocale(LC_ALL, "C") is obeyed
1476 at the start of a program; however, it seems that some environments do not
1477 follow this. A "strange" locale can affect the formatting of timestamps, so we
1480 setlocale(LC_ALL, "C");
1482 /* Set up the default handler for timing using alarm(). */
1484 os_non_restarting_signal(SIGALRM, sigalrm_handler);
1486 /* Ensure we have a buffer for constructing log entries. Use malloc directly,
1487 because store_malloc writes a log entry on failure. */
1489 log_buffer = (uschar *)malloc(LOG_BUFFER_SIZE);
1490 if (log_buffer == NULL)
1492 fprintf(stderr, "exim: failed to get store for log buffer\n");
1496 /* Set log_stderr to stderr, provided that stderr exists. This gets reset to
1497 NULL when the daemon is run and the file is closed. We have to use this
1498 indirection, because some systems don't allow writing to the variable "stderr".
1501 if (fstat(fileno(stderr), &statbuf) >= 0) log_stderr = stderr;
1503 /* Arrange for the PCRE regex library to use our store functions. Note that
1504 the normal calls are actually macros that add additional arguments for
1505 debugging purposes so we have to assign specially constructed functions here.
1506 The default is to use store in the stacking pool, but this is overridden in the
1507 regex_must_compile() function. */
1509 pcre_malloc = function_store_get;
1510 pcre_free = function_dummy_free;
1512 /* Ensure there is a big buffer for temporary use in several places. It is put
1513 in malloc store so that it can be freed for enlargement if necessary. */
1515 big_buffer = store_malloc(big_buffer_size);
1517 /* Set up the handler for the data request signal, and set the initial
1518 descriptive text. */
1520 set_process_info("initializing");
1521 os_restarting_signal(SIGUSR1, usr1_handler);
1523 /* SIGHUP is used to get the daemon to reconfigure. It gets set as appropriate
1524 in the daemon code. For the rest of Exim's uses, we ignore it. */
1526 signal(SIGHUP, SIG_IGN);
1528 /* We don't want to die on pipe errors as the code is written to handle
1529 the write error instead. */
1531 signal(SIGPIPE, SIG_IGN);
1533 /* Under some circumstance on some OS, Exim can get called with SIGCHLD
1534 set to SIG_IGN. This causes subprocesses that complete before the parent
1535 process waits for them not to hang around, so when Exim calls wait(), nothing
1536 is there. The wait() code has been made robust against this, but let's ensure
1537 that SIGCHLD is set to SIG_DFL, because it's tidier to wait and get a process
1538 ending status. We use sigaction rather than plain signal() on those OS where
1539 SA_NOCLDWAIT exists, because we want to be sure it is turned off. (There was a
1540 problem on AIX with this.) */
1544 struct sigaction act;
1545 act.sa_handler = SIG_DFL;
1546 sigemptyset(&(act.sa_mask));
1548 sigaction(SIGCHLD, &act, NULL);
1551 signal(SIGCHLD, SIG_DFL);
1554 /* Save the arguments for use if we re-exec exim as a daemon after receiving
1559 /* Set up the version number. Set up the leading 'E' for the external form of
1560 message ids, set the pointer to the internal form, and initialize it to
1561 indicate no message being processed. */
1564 message_id_option[0] = '-';
1565 message_id_external = message_id_option + 1;
1566 message_id_external[0] = 'E';
1567 message_id = message_id_external + 1;
1570 /* Set the umask to zero so that any files Exim creates using open() are
1571 created with the modes that it specifies. NOTE: Files created with fopen() have
1572 a problem, which was not recognized till rather late (February 2006). With this
1573 umask, such files will be world writeable. (They are all content scanning files
1574 in the spool directory, which isn't world-accessible, so this is not a
1575 disaster, but it's untidy.) I don't want to change this overall setting,
1576 however, because it will interact badly with the open() calls. Instead, there's
1577 now a function called modefopen() that fiddles with the umask while calling
1582 /* Precompile the regular expression for matching a message id. Keep this in
1583 step with the code that generates ids in the accept.c module. We need to do
1584 this here, because the -M options check their arguments for syntactic validity
1585 using mac_ismsgid, which uses this. */
1588 regex_must_compile(US"^(?:[^\\W_]{6}-){2}[^\\W_]{2}$", FALSE, TRUE);
1590 /* Precompile the regular expression that is used for matching an SMTP error
1591 code, possibly extended, at the start of an error message. Note that the
1592 terminating whitespace character is included. */
1595 regex_must_compile(US"^\\d\\d\\d\\s(?:\\d\\.\\d\\d?\\d?\\.\\d\\d?\\d?\\s)?",
1598 #ifdef WHITELIST_D_MACROS
1599 /* Precompile the regular expression used to filter the content of macros
1600 given to -D for permissibility. */
1602 regex_whitelisted_macro =
1603 regex_must_compile(US"^[A-Za-z0-9_/.-]*$", FALSE, TRUE);
1607 /* If the program is called as "mailq" treat it as equivalent to "exim -bp";
1608 this seems to be a generally accepted convention, since one finds symbolic
1609 links called "mailq" in standard OS configurations. */
1611 if ((namelen == 5 && Ustrcmp(argv[0], "mailq") == 0) ||
1612 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/mailq", 6) == 0))
1615 receiving_message = FALSE;
1616 called_as = US"-mailq";
1619 /* If the program is called as "rmail" treat it as equivalent to
1620 "exim -i -oee", thus allowing UUCP messages to be input using non-SMTP mode,
1621 i.e. preventing a single dot on a line from terminating the message, and
1622 returning with zero return code, even in cases of error (provided an error
1623 message has been sent). */
1625 if ((namelen == 5 && Ustrcmp(argv[0], "rmail") == 0) ||
1626 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/rmail", 6) == 0))
1629 called_as = US"-rmail";
1630 errors_sender_rc = EXIT_SUCCESS;
1633 /* If the program is called as "rsmtp" treat it as equivalent to "exim -bS";
1634 this is a smail convention. */
1636 if ((namelen == 5 && Ustrcmp(argv[0], "rsmtp") == 0) ||
1637 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/rsmtp", 6) == 0))
1639 smtp_input = smtp_batched_input = TRUE;
1640 called_as = US"-rsmtp";
1643 /* If the program is called as "runq" treat it as equivalent to "exim -q";
1644 this is a smail convention. */
1646 if ((namelen == 4 && Ustrcmp(argv[0], "runq") == 0) ||
1647 (namelen > 4 && Ustrncmp(argv[0] + namelen - 5, "/runq", 5) == 0))
1650 receiving_message = FALSE;
1651 called_as = US"-runq";
1654 /* If the program is called as "newaliases" treat it as equivalent to
1655 "exim -bi"; this is a sendmail convention. */
1657 if ((namelen == 10 && Ustrcmp(argv[0], "newaliases") == 0) ||
1658 (namelen > 10 && Ustrncmp(argv[0] + namelen - 11, "/newaliases", 11) == 0))
1661 receiving_message = FALSE;
1662 called_as = US"-newaliases";
1665 /* Save the original effective uid for a couple of uses later. It should
1666 normally be root, but in some esoteric environments it may not be. */
1668 original_euid = geteuid();
1670 /* Get the real uid and gid. If the caller is root, force the effective uid/gid
1671 to be the same as the real ones. This makes a difference only if Exim is setuid
1672 (or setgid) to something other than root, which could be the case in some
1673 special configurations. */
1675 real_uid = getuid();
1676 real_gid = getgid();
1678 if (real_uid == root_uid)
1680 rv = setgid(real_gid);
1683 fprintf(stderr, "exim: setgid(%ld) failed: %s\n",
1684 (long int)real_gid, strerror(errno));
1687 rv = setuid(real_uid);
1690 fprintf(stderr, "exim: setuid(%ld) failed: %s\n",
1691 (long int)real_uid, strerror(errno));
1696 /* If neither the original real uid nor the original euid was root, Exim is
1697 running in an unprivileged state. */
1699 unprivileged = (real_uid != root_uid && original_euid != root_uid);
1701 /* Scan the program's arguments. Some can be dealt with right away; others are
1702 simply recorded for checking and handling afterwards. Do a high-level switch
1703 on the second character (the one after '-'), to save some effort. */
1705 for (i = 1; i < argc; i++)
1707 BOOL badarg = FALSE;
1708 uschar *arg = argv[i];
1712 /* An argument not starting with '-' is the start of a recipients list;
1713 break out of the options-scanning loop. */
1721 /* An option consistion of -- terminates the options */
1723 if (Ustrcmp(arg, "--") == 0)
1725 recipients_arg = i + 1;
1729 /* Handle flagged options */
1731 switchchar = arg[1];
1734 /* Make all -ex options synonymous with -oex arguments, since that
1735 is assumed by various callers. Also make -qR options synonymous with -R
1736 options, as that seems to be required as well. Allow for -qqR too, and
1737 the same for -S options. */
1739 if (Ustrncmp(arg+1, "oe", 2) == 0 ||
1740 Ustrncmp(arg+1, "qR", 2) == 0 ||
1741 Ustrncmp(arg+1, "qS", 2) == 0)
1743 switchchar = arg[2];
1746 else if (Ustrncmp(arg+1, "qqR", 3) == 0 || Ustrncmp(arg+1, "qqS", 3) == 0)
1748 switchchar = arg[3];
1750 queue_2stage = TRUE;
1753 /* Make -r synonymous with -f, since it is a documented alias */
1755 else if (arg[1] == 'r') switchchar = 'f';
1757 /* Make -ov synonymous with -v */
1759 else if (Ustrcmp(arg, "-ov") == 0)
1765 /* deal with --option_aliases */
1766 else if (switchchar == '-')
1768 if (Ustrcmp(argrest, "help") == 0)
1770 usage_wanted = TRUE;
1773 else if (Ustrcmp(argrest, "version") == 0)
1780 /* High-level switch on active initial letter */
1784 /* -Btype is a sendmail option for 7bit/8bit setting. Exim is 8-bit clean
1785 so has no need of it. */
1788 if (*argrest == 0) i++; /* Skip over the type */
1793 receiving_message = FALSE; /* Reset TRUE for -bm, -bS, -bs below */
1795 /* -bd: Run in daemon mode, awaiting SMTP connections.
1796 -bdf: Ditto, but in the foreground.
1799 if (*argrest == 'd')
1801 daemon_listen = TRUE;
1802 if (*(++argrest) == 'f') background_daemon = FALSE;
1803 else if (*argrest != 0) { badarg = TRUE; break; }
1806 /* -be: Run in expansion test mode
1807 -bem: Ditto, but read a message from a file first
1810 else if (*argrest == 'e')
1812 expansion_test = checking = TRUE;
1813 if (argrest[1] == 'm')
1815 if (++i >= argc) { badarg = TRUE; break; }
1816 expansion_test_message = argv[i];
1819 if (argrest[1] != 0) { badarg = TRUE; break; }
1822 /* -bF: Run system filter test */
1824 else if (*argrest == 'F')
1826 filter_test |= FTEST_SYSTEM;
1827 if (*(++argrest) != 0) { badarg = TRUE; break; }
1828 if (++i < argc) filter_test_sfile = argv[i]; else
1830 fprintf(stderr, "exim: file name expected after %s\n", argv[i-1]);
1835 /* -bf: Run user filter test
1836 -bfd: Set domain for filter testing
1837 -bfl: Set local part for filter testing
1838 -bfp: Set prefix for filter testing
1839 -bfs: Set suffix for filter testing
1842 else if (*argrest == 'f')
1844 if (*(++argrest) == 0)
1846 filter_test |= FTEST_USER;
1847 if (++i < argc) filter_test_ufile = argv[i]; else
1849 fprintf(stderr, "exim: file name expected after %s\n", argv[i-1]);
1857 fprintf(stderr, "exim: string expected after %s\n", arg);
1860 if (Ustrcmp(argrest, "d") == 0) ftest_domain = argv[i];
1861 else if (Ustrcmp(argrest, "l") == 0) ftest_localpart = argv[i];
1862 else if (Ustrcmp(argrest, "p") == 0) ftest_prefix = argv[i];
1863 else if (Ustrcmp(argrest, "s") == 0) ftest_suffix = argv[i];
1864 else { badarg = TRUE; break; }
1868 /* -bh: Host checking - an IP address must follow. */
1870 else if (Ustrcmp(argrest, "h") == 0 || Ustrcmp(argrest, "hc") == 0)
1872 if (++i >= argc) { badarg = TRUE; break; }
1873 sender_host_address = argv[i];
1874 host_checking = checking = log_testing_mode = TRUE;
1875 host_checking_callout = argrest[1] == 'c';
1878 /* -bi: This option is used by sendmail to initialize *the* alias file,
1879 though it has the -oA option to specify a different file. Exim has no
1880 concept of *the* alias file, but since Sun's YP make script calls
1881 sendmail this way, some support must be provided. */
1883 else if (Ustrcmp(argrest, "i") == 0) bi_option = TRUE;
1885 /* -bm: Accept and deliver message - the default option. Reinstate
1886 receiving_message, which got turned off for all -b options. */
1888 else if (Ustrcmp(argrest, "m") == 0) receiving_message = TRUE;
1890 /* -bmalware: test the filename given for malware */
1892 else if (Ustrcmp(argrest, "malware") == 0)
1894 if (++i >= argc) { badarg = TRUE; break; }
1895 malware_test_file = argv[i];
1898 /* -bnq: For locally originating messages, do not qualify unqualified
1899 addresses. In the envelope, this causes errors; in header lines they
1902 else if (Ustrcmp(argrest, "nq") == 0)
1904 allow_unqualified_sender = FALSE;
1905 allow_unqualified_recipient = FALSE;
1908 /* -bpxx: List the contents of the mail queue, in various forms. If
1909 the option is -bpc, just a queue count is needed. Otherwise, if the
1910 first letter after p is r, then order is random. */
1912 else if (*argrest == 'p')
1914 if (*(++argrest) == 'c')
1917 if (*(++argrest) != 0) badarg = TRUE;
1921 if (*argrest == 'r')
1923 list_queue_option = 8;
1926 else list_queue_option = 0;
1930 /* -bp: List the contents of the mail queue, top-level only */
1932 if (*argrest == 0) {}
1934 /* -bpu: List the contents of the mail queue, top-level undelivered */
1936 else if (Ustrcmp(argrest, "u") == 0) list_queue_option += 1;
1938 /* -bpa: List the contents of the mail queue, including all delivered */
1940 else if (Ustrcmp(argrest, "a") == 0) list_queue_option += 2;
1942 /* Unknown after -bp[r] */
1952 /* -bP: List the configuration variables given as the address list.
1953 Force -v, so configuration errors get displayed. */
1955 else if (Ustrcmp(argrest, "P") == 0)
1957 list_options = TRUE;
1958 debug_selector |= D_v;
1959 debug_file = stderr;
1962 /* -brt: Test retry configuration lookup */
1964 else if (Ustrcmp(argrest, "rt") == 0)
1966 test_retry_arg = i + 1;
1970 /* -brw: Test rewrite configuration */
1972 else if (Ustrcmp(argrest, "rw") == 0)
1974 test_rewrite_arg = i + 1;
1978 /* -bS: Read SMTP commands on standard input, but produce no replies -
1979 all errors are reported by sending messages. */
1981 else if (Ustrcmp(argrest, "S") == 0)
1982 smtp_input = smtp_batched_input = receiving_message = TRUE;
1984 /* -bs: Read SMTP commands on standard input and produce SMTP replies
1985 on standard output. */
1987 else if (Ustrcmp(argrest, "s") == 0) smtp_input = receiving_message = TRUE;
1989 /* -bt: address testing mode */
1991 else if (Ustrcmp(argrest, "t") == 0)
1992 address_test_mode = checking = log_testing_mode = TRUE;
1994 /* -bv: verify addresses */
1996 else if (Ustrcmp(argrest, "v") == 0)
1997 verify_address_mode = checking = log_testing_mode = TRUE;
1999 /* -bvs: verify sender addresses */
2001 else if (Ustrcmp(argrest, "vs") == 0)
2003 verify_address_mode = checking = log_testing_mode = TRUE;
2004 verify_as_sender = TRUE;
2007 /* -bV: Print version string and support details */
2009 else if (Ustrcmp(argrest, "V") == 0)
2011 printf("Exim version %s #%s built %s\n", version_string,
2012 version_cnumber, version_date);
2013 printf("%s\n", CS version_copyright);
2014 version_printed = TRUE;
2015 show_whats_supported(stdout);
2022 /* -C: change configuration file list; ignore if it isn't really
2023 a change! Enforce a prefix check if required. */
2028 if(++i < argc) argrest = argv[i]; else
2029 { badarg = TRUE; break; }
2031 if (Ustrcmp(config_main_filelist, argrest) != 0)
2033 #ifdef ALT_CONFIG_PREFIX
2035 int len = Ustrlen(ALT_CONFIG_PREFIX);
2036 uschar *list = argrest;
2038 while((filename = string_nextinlist(&list, &sep, big_buffer,
2039 big_buffer_size)) != NULL)
2041 if ((Ustrlen(filename) < len ||
2042 Ustrncmp(filename, ALT_CONFIG_PREFIX, len) != 0 ||
2043 Ustrstr(filename, "/../") != NULL) &&
2044 (Ustrcmp(filename, "/dev/null") != 0 || real_uid != root_uid))
2046 fprintf(stderr, "-C Permission denied\n");
2051 if (real_uid != root_uid)
2053 #ifdef TRUSTED_CONFIG_LIST
2055 if (real_uid != exim_uid
2056 #ifdef CONFIGURE_OWNER
2057 && real_uid != config_uid
2060 trusted_config = FALSE;
2063 FILE *trust_list = Ufopen(TRUSTED_CONFIG_LIST, "rb");
2066 struct stat statbuf;
2068 if (fstat(fileno(trust_list), &statbuf) != 0 ||
2069 (statbuf.st_uid != root_uid /* owner not root */
2070 #ifdef CONFIGURE_OWNER
2071 && statbuf.st_uid != config_uid /* owner not the special one */
2074 (statbuf.st_gid != root_gid /* group not root */
2075 #ifdef CONFIGURE_GROUP
2076 && statbuf.st_gid != config_gid /* group not the special one */
2078 && (statbuf.st_mode & 020) != 0 /* group writeable */
2080 (statbuf.st_mode & 2) != 0) /* world writeable */
2082 trusted_config = FALSE;
2087 /* Well, the trust list at least is up to scratch... */
2088 void *reset_point = store_get(0);
2089 uschar *trusted_configs[32];
2093 while (Ufgets(big_buffer, big_buffer_size, trust_list))
2095 uschar *start = big_buffer, *nl;
2096 while (*start && isspace(*start))
2100 nl = Ustrchr(start, '\n');
2103 trusted_configs[nr_configs++] = string_copy(start);
2104 if (nr_configs == 32)
2112 uschar *list = argrest;
2114 while (trusted_config && (filename = string_nextinlist(&list,
2115 &sep, big_buffer, big_buffer_size)) != NULL)
2117 for (i=0; i < nr_configs; i++)
2119 if (Ustrcmp(filename, trusted_configs[i]) == 0)
2122 if (i == nr_configs)
2124 trusted_config = FALSE;
2128 store_reset(reset_point);
2132 /* No valid prefixes found in trust_list file. */
2133 trusted_config = FALSE;
2139 /* Could not open trust_list file. */
2140 trusted_config = FALSE;
2144 /* Not root; don't trust config */
2145 trusted_config = FALSE;
2149 config_main_filelist = argrest;
2150 config_changed = TRUE;
2155 /* -D: set up a macro definition */
2158 #ifdef DISABLE_D_OPTION
2159 fprintf(stderr, "exim: -D is not available in this Exim binary\n");
2164 macro_item *mlast = NULL;
2167 uschar *s = argrest;
2169 while (isspace(*s)) s++;
2171 if (*s < 'A' || *s > 'Z')
2173 fprintf(stderr, "exim: macro name set by -D must start with "
2174 "an upper case letter\n");
2178 while (isalnum(*s) || *s == '_')
2180 if (ptr < sizeof(name)-1) name[ptr++] = *s;
2184 if (ptr == 0) { badarg = TRUE; break; }
2185 while (isspace(*s)) s++;
2188 if (*s++ != '=') { badarg = TRUE; break; }
2189 while (isspace(*s)) s++;
2192 for (m = macros; m != NULL; m = m->next)
2194 if (Ustrcmp(m->name, name) == 0)
2196 fprintf(stderr, "exim: duplicated -D in command line\n");
2202 m = store_get(sizeof(macro_item) + Ustrlen(name));
2204 m->command_line = TRUE;
2205 if (mlast == NULL) macros = m; else mlast->next = m;
2206 Ustrcpy(m->name, name);
2207 m->replacement = string_copy(s);
2209 if (clmacro_count >= MAX_CLMACROS)
2211 fprintf(stderr, "exim: too many -D options on command line\n");
2214 clmacros[clmacro_count++] = string_sprintf("-D%s=%s", m->name,
2220 /* -d: Set debug level (see also -v below) or set the drop_cr option.
2221 The latter is now a no-op, retained for compatibility only. If -dd is used,
2222 debugging subprocesses of the daemon is disabled. */
2225 if (Ustrcmp(argrest, "ropcr") == 0)
2227 /* drop_cr = TRUE; */
2230 /* Use an intermediate variable so that we don't set debugging while
2231 decoding the debugging bits. */
2235 unsigned int selector = D_default;
2238 if (*argrest == 'd')
2240 debug_daemon = TRUE;
2244 decode_bits(&selector, NULL, D_memory, 0, argrest, debug_options,
2245 debug_options_count, US"debug", 0);
2246 debug_selector = selector;
2251 /* -E: This is a local error message. This option is not intended for
2252 external use at all, but is not restricted to trusted callers because it
2253 does no harm (just suppresses certain error messages) and if Exim is run
2254 not setuid root it won't always be trusted when it generates error
2255 messages using this option. If there is a message id following -E, point
2256 message_reference at it, for logging. */
2259 local_error_message = TRUE;
2260 if (mac_ismsgid(argrest)) message_reference = argrest;
2264 /* -ex: The vacation program calls sendmail with the undocumented "-eq"
2265 option, so it looks as if historically the -oex options are also callable
2266 without the leading -o. So we have to accept them. Before the switch,
2267 anything starting -oe has been converted to -e. Exim does not support all
2268 of the sendmail error options. */
2271 if (Ustrcmp(argrest, "e") == 0)
2273 arg_error_handling = ERRORS_SENDER;
2274 errors_sender_rc = EXIT_SUCCESS;
2276 else if (Ustrcmp(argrest, "m") == 0) arg_error_handling = ERRORS_SENDER;
2277 else if (Ustrcmp(argrest, "p") == 0) arg_error_handling = ERRORS_STDERR;
2278 else if (Ustrcmp(argrest, "q") == 0) arg_error_handling = ERRORS_STDERR;
2279 else if (Ustrcmp(argrest, "w") == 0) arg_error_handling = ERRORS_SENDER;
2284 /* -F: Set sender's full name, used instead of the gecos entry from
2285 the password file. Since users can usually alter their gecos entries,
2286 there's no security involved in using this instead. The data can follow
2287 the -F or be in the next argument. */
2292 if(++i < argc) argrest = argv[i]; else
2293 { badarg = TRUE; break; }
2295 originator_name = argrest;
2296 sender_name_forced = TRUE;
2300 /* -f: Set sender's address - this value is only actually used if Exim is
2301 run by a trusted user, or if untrusted_set_sender is set and matches the
2302 address, except that the null address can always be set by any user. The
2303 test for this happens later, when the value given here is ignored when not
2304 permitted. For an untrusted user, the actual sender is still put in Sender:
2305 if it doesn't match the From: header (unless no_local_from_check is set).
2306 The data can follow the -f or be in the next argument. The -r switch is an
2307 obsolete form of -f but since there appear to be programs out there that
2308 use anything that sendmail has ever supported, better accept it - the
2309 synonymizing is done before the switch above.
2311 At this stage, we must allow domain literal addresses, because we don't
2312 know what the setting of allow_domain_literals is yet. Ditto for trailing
2313 dots and strip_trailing_dot. */
2321 if (i+1 < argc) argrest = argv[++i]; else
2322 { badarg = TRUE; break; }
2326 sender_address = string_sprintf(""); /* Ensure writeable memory */
2330 uschar *temp = argrest + Ustrlen(argrest) - 1;
2331 while (temp >= argrest && isspace(*temp)) temp--;
2332 if (temp >= argrest && *temp == '.') f_end_dot = TRUE;
2333 allow_domain_literals = TRUE;
2334 strip_trailing_dot = TRUE;
2335 sender_address = parse_extract_address(argrest, &errmess, &start, &end,
2336 &sender_address_domain, TRUE);
2337 allow_domain_literals = FALSE;
2338 strip_trailing_dot = FALSE;
2339 if (sender_address == NULL)
2341 fprintf(stderr, "exim: bad -f address \"%s\": %s\n", argrest, errmess);
2342 return EXIT_FAILURE;
2345 sender_address_forced = TRUE;
2349 /* This is some Sendmail thing which can be ignored */
2354 /* -h: Set the hop count for an incoming message. Exim does not currently
2355 support this; it always computes it by counting the Received: headers.
2356 To put it in will require a change to the spool header file format. */
2361 if(++i < argc) argrest = argv[i]; else
2362 { badarg = TRUE; break; }
2364 if (!isdigit(*argrest)) badarg = TRUE;
2368 /* -i: Set flag so dot doesn't end non-SMTP input (same as -oi, seems
2369 not to be documented for sendmail but mailx (at least) uses it) */
2372 if (*argrest == 0) dot_ends = FALSE; else badarg = TRUE;
2377 receiving_message = FALSE;
2379 /* -MC: continue delivery of another message via an existing open
2380 file descriptor. This option is used for an internal call by the
2381 smtp transport when there is a pending message waiting to go to an
2382 address to which it has got a connection. Five subsequent arguments are
2383 required: transport name, host name, IP address, sequence number, and
2384 message_id. Transports may decline to create new processes if the sequence
2385 number gets too big. The channel is stdin. This (-MC) must be the last
2386 argument. There's a subsequent check that the real-uid is privileged.
2388 If we are running in the test harness. delay for a bit, to let the process
2389 that set this one up complete. This makes for repeatability of the logging,
2392 if (Ustrcmp(argrest, "C") == 0)
2394 union sockaddr_46 interface_sock;
2395 EXIM_SOCKLEN_T size = sizeof(interface_sock);
2399 fprintf(stderr, "exim: too many or too few arguments after -MC\n");
2400 return EXIT_FAILURE;
2403 if (msg_action_arg >= 0)
2405 fprintf(stderr, "exim: incompatible arguments\n");
2406 return EXIT_FAILURE;
2409 continue_transport = argv[++i];
2410 continue_hostname = argv[++i];
2411 continue_host_address = argv[++i];
2412 continue_sequence = Uatoi(argv[++i]);
2413 msg_action = MSG_DELIVER;
2414 msg_action_arg = ++i;
2415 forced_delivery = TRUE;
2416 queue_run_pid = passed_qr_pid;
2417 queue_run_pipe = passed_qr_pipe;
2419 if (!mac_ismsgid(argv[i]))
2421 fprintf(stderr, "exim: malformed message id %s after -MC option\n",
2423 return EXIT_FAILURE;
2426 /* Set up $sending_ip_address and $sending_port */
2428 if (getsockname(fileno(stdin), (struct sockaddr *)(&interface_sock),
2430 sending_ip_address = host_ntoa(-1, &interface_sock, NULL,
2434 fprintf(stderr, "exim: getsockname() failed after -MC option: %s\n",
2436 return EXIT_FAILURE;
2439 if (running_in_test_harness) millisleep(500);
2443 /* -MCA: set the smtp_authenticated flag; this is useful only when it
2444 precedes -MC (see above). The flag indicates that the host to which
2445 Exim is connected has accepted an AUTH sequence. */
2447 else if (Ustrcmp(argrest, "CA") == 0)
2449 smtp_authenticated = TRUE;
2453 /* -MCP: set the smtp_use_pipelining flag; this is useful only when
2454 it preceded -MC (see above) */
2456 else if (Ustrcmp(argrest, "CP") == 0)
2458 smtp_use_pipelining = TRUE;
2462 /* -MCQ: pass on the pid of the queue-running process that started
2463 this chain of deliveries and the fd of its synchronizing pipe; this
2464 is useful only when it precedes -MC (see above) */
2466 else if (Ustrcmp(argrest, "CQ") == 0)
2468 if(++i < argc) passed_qr_pid = (pid_t)(Uatol(argv[i]));
2470 if(++i < argc) passed_qr_pipe = (int)(Uatol(argv[i]));
2475 /* -MCS: set the smtp_use_size flag; this is useful only when it
2476 precedes -MC (see above) */
2478 else if (Ustrcmp(argrest, "CS") == 0)
2480 smtp_use_size = TRUE;
2484 /* -MCT: set the tls_offered flag; this is useful only when it
2485 precedes -MC (see above). The flag indicates that the host to which
2486 Exim is connected has offered TLS support. */
2489 else if (Ustrcmp(argrest, "CT") == 0)
2496 /* -M[x]: various operations on the following list of message ids:
2497 -M deliver the messages, ignoring next retry times and thawing
2498 -Mc deliver the messages, checking next retry times, no thawing
2499 -Mf freeze the messages
2500 -Mg give up on the messages
2501 -Mt thaw the messages
2502 -Mrm remove the messages
2503 In the above cases, this must be the last option. There are also the
2504 following options which are followed by a single message id, and which
2505 act on that message. Some of them use the "recipient" addresses as well.
2506 -Mar add recipient(s)
2507 -Mmad mark all recipients delivered
2508 -Mmd mark recipients(s) delivered
2510 -Mset load a message for use with -be
2512 -Mvc show copy (of whole message, in RFC 2822 format)
2517 else if (*argrest == 0)
2519 msg_action = MSG_DELIVER;
2520 forced_delivery = deliver_force_thaw = TRUE;
2522 else if (Ustrcmp(argrest, "ar") == 0)
2524 msg_action = MSG_ADD_RECIPIENT;
2525 one_msg_action = TRUE;
2527 else if (Ustrcmp(argrest, "c") == 0) msg_action = MSG_DELIVER;
2528 else if (Ustrcmp(argrest, "es") == 0)
2530 msg_action = MSG_EDIT_SENDER;
2531 one_msg_action = TRUE;
2533 else if (Ustrcmp(argrest, "f") == 0) msg_action = MSG_FREEZE;
2534 else if (Ustrcmp(argrest, "g") == 0)
2536 msg_action = MSG_DELIVER;
2537 deliver_give_up = TRUE;
2539 else if (Ustrcmp(argrest, "mad") == 0)
2541 msg_action = MSG_MARK_ALL_DELIVERED;
2543 else if (Ustrcmp(argrest, "md") == 0)
2545 msg_action = MSG_MARK_DELIVERED;
2546 one_msg_action = TRUE;
2548 else if (Ustrcmp(argrest, "rm") == 0) msg_action = MSG_REMOVE;
2549 else if (Ustrcmp(argrest, "set") == 0)
2551 msg_action = MSG_LOAD;
2552 one_msg_action = TRUE;
2554 else if (Ustrcmp(argrest, "t") == 0) msg_action = MSG_THAW;
2555 else if (Ustrcmp(argrest, "vb") == 0)
2557 msg_action = MSG_SHOW_BODY;
2558 one_msg_action = TRUE;
2560 else if (Ustrcmp(argrest, "vc") == 0)
2562 msg_action = MSG_SHOW_COPY;
2563 one_msg_action = TRUE;
2565 else if (Ustrcmp(argrest, "vh") == 0)
2567 msg_action = MSG_SHOW_HEADER;
2568 one_msg_action = TRUE;
2570 else if (Ustrcmp(argrest, "vl") == 0)
2572 msg_action = MSG_SHOW_LOG;
2573 one_msg_action = TRUE;
2575 else { badarg = TRUE; break; }
2577 /* All the -Mxx options require at least one message id. */
2579 msg_action_arg = i + 1;
2580 if (msg_action_arg >= argc)
2582 fprintf(stderr, "exim: no message ids given after %s option\n", arg);
2583 return EXIT_FAILURE;
2586 /* Some require only message ids to follow */
2588 if (!one_msg_action)
2591 for (j = msg_action_arg; j < argc; j++) if (!mac_ismsgid(argv[j]))
2593 fprintf(stderr, "exim: malformed message id %s after %s option\n",
2595 return EXIT_FAILURE;
2597 goto END_ARG; /* Remaining args are ids */
2600 /* Others require only one message id, possibly followed by addresses,
2601 which will be handled as normal arguments. */
2605 if (!mac_ismsgid(argv[msg_action_arg]))
2607 fprintf(stderr, "exim: malformed message id %s after %s option\n",
2608 argv[msg_action_arg], arg);
2609 return EXIT_FAILURE;
2616 /* Some programs seem to call the -om option without the leading o;
2617 for sendmail it askes for "me too". Exim always does this. */
2620 if (*argrest != 0) badarg = TRUE;
2624 /* -N: don't do delivery - a debugging option that stops transports doing
2625 their thing. It implies debugging at the D_v level. */
2630 dont_deliver = TRUE;
2631 debug_selector |= D_v;
2632 debug_file = stderr;
2638 /* -n: This means "don't alias" in sendmail, apparently. Just ignore
2644 /* -O: Just ignore it. In sendmail, apparently -O option=value means set
2645 option to the specified value. This form uses long names. We need to handle
2646 -O option=value and -Ooption=value. */
2653 fprintf(stderr, "exim: string expected after -O\n");
2661 /* -oA: Set an argument for the bi command (sendmail's "alternate alias
2664 if (*argrest == 'A')
2666 alias_arg = argrest + 1;
2667 if (alias_arg[0] == 0)
2669 if (i+1 < argc) alias_arg = argv[++i]; else
2671 fprintf(stderr, "exim: string expected after -oA\n");
2677 /* -oB: Set a connection message max value for remote deliveries */
2679 else if (*argrest == 'B')
2681 uschar *p = argrest + 1;
2684 if (i+1 < argc && isdigit((argv[i+1][0]))) p = argv[++i]; else
2686 connection_max_messages = 1;
2695 fprintf(stderr, "exim: number expected after -oB\n");
2698 connection_max_messages = Uatoi(p);
2702 /* -odb: background delivery */
2704 else if (Ustrcmp(argrest, "db") == 0)
2706 synchronous_delivery = FALSE;
2707 arg_queue_only = FALSE;
2708 queue_only_set = TRUE;
2711 /* -odf: foreground delivery (smail-compatible option); same effect as
2712 -odi: interactive (synchronous) delivery (sendmail-compatible option)
2715 else if (Ustrcmp(argrest, "df") == 0 || Ustrcmp(argrest, "di") == 0)
2717 synchronous_delivery = TRUE;
2718 arg_queue_only = FALSE;
2719 queue_only_set = TRUE;
2722 /* -odq: queue only */
2724 else if (Ustrcmp(argrest, "dq") == 0)
2726 synchronous_delivery = FALSE;
2727 arg_queue_only = TRUE;
2728 queue_only_set = TRUE;
2731 /* -odqs: queue SMTP only - do local deliveries and remote routing,
2732 but no remote delivery */
2734 else if (Ustrcmp(argrest, "dqs") == 0)
2737 arg_queue_only = FALSE;
2738 queue_only_set = TRUE;
2741 /* -oex: Sendmail error flags. As these are also accepted without the
2742 leading -o prefix, for compatibility with vacation and other callers,
2743 they are handled with -e above. */
2745 /* -oi: Set flag so dot doesn't end non-SMTP input (same as -i)
2746 -oitrue: Another sendmail syntax for the same */
2748 else if (Ustrcmp(argrest, "i") == 0 ||
2749 Ustrcmp(argrest, "itrue") == 0)
2752 /* -oM*: Set various characteristics for an incoming message; actually
2753 acted on for trusted callers only. */
2755 else if (*argrest == 'M')
2759 fprintf(stderr, "exim: data expected after -o%s\n", argrest);
2763 /* -oMa: Set sender host address */
2765 if (Ustrcmp(argrest, "Ma") == 0) sender_host_address = argv[++i];
2767 /* -oMaa: Set authenticator name */
2769 else if (Ustrcmp(argrest, "Maa") == 0)
2770 sender_host_authenticated = argv[++i];
2772 /* -oMas: setting authenticated sender */
2774 else if (Ustrcmp(argrest, "Mas") == 0) authenticated_sender = argv[++i];
2776 /* -oMai: setting authenticated id */
2778 else if (Ustrcmp(argrest, "Mai") == 0) authenticated_id = argv[++i];
2780 /* -oMi: Set incoming interface address */
2782 else if (Ustrcmp(argrest, "Mi") == 0) interface_address = argv[++i];
2784 /* -oMr: Received protocol */
2786 else if (Ustrcmp(argrest, "Mr") == 0) received_protocol = argv[++i];
2788 /* -oMs: Set sender host name */
2790 else if (Ustrcmp(argrest, "Ms") == 0) sender_host_name = argv[++i];
2792 /* -oMt: Set sender ident */
2794 else if (Ustrcmp(argrest, "Mt") == 0)
2796 sender_ident_set = TRUE;
2797 sender_ident = argv[++i];
2800 /* Else a bad argument */
2809 /* -om: Me-too flag for aliases. Exim always does this. Some programs
2810 seem to call this as -m (undocumented), so that is also accepted (see
2813 else if (Ustrcmp(argrest, "m") == 0) {}
2815 /* -oo: An ancient flag for old-style addresses which still seems to
2816 crop up in some calls (see in SCO). */
2818 else if (Ustrcmp(argrest, "o") == 0) {}
2820 /* -oP <name>: set pid file path for daemon */
2822 else if (Ustrcmp(argrest, "P") == 0)
2823 override_pid_file_path = argv[++i];
2825 /* -or <n>: set timeout for non-SMTP acceptance
2826 -os <n>: set timeout for SMTP acceptance */
2828 else if (*argrest == 'r' || *argrest == 's')
2830 int *tp = (*argrest == 'r')?
2831 &arg_receive_timeout : &arg_smtp_receive_timeout;
2832 if (argrest[1] == 0)
2834 if (i+1 < argc) *tp= readconf_readtime(argv[++i], 0, FALSE);
2836 else *tp = readconf_readtime(argrest + 1, 0, FALSE);
2839 fprintf(stderr, "exim: bad time value %s: abandoned\n", argv[i]);
2844 /* -oX <list>: Override local_interfaces and/or default daemon ports */
2846 else if (Ustrcmp(argrest, "X") == 0)
2847 override_local_interfaces = argv[++i];
2849 /* Unknown -o argument */
2855 /* -ps: force Perl startup; -pd force delayed Perl startup */
2859 if (*argrest == 's' && argrest[1] == 0)
2861 perl_start_option = 1;
2864 if (*argrest == 'd' && argrest[1] == 0)
2866 perl_start_option = -1;
2871 /* -panythingelse is taken as the Sendmail-compatible argument -prval:sval,
2872 which sets the host protocol and host name */
2876 if (i+1 < argc) argrest = argv[++i]; else
2877 { badarg = TRUE; break; }
2882 uschar *hn = Ustrchr(argrest, ':');
2885 received_protocol = argrest;
2889 received_protocol = string_copyn(argrest, hn - argrest);
2890 sender_host_name = hn + 1;
2897 receiving_message = FALSE;
2898 if (queue_interval >= 0)
2900 fprintf(stderr, "exim: -q specified more than once\n");
2904 /* -qq...: Do queue runs in a 2-stage manner */
2906 if (*argrest == 'q')
2908 queue_2stage = TRUE;
2912 /* -qi...: Do only first (initial) deliveries */
2914 if (*argrest == 'i')
2916 queue_run_first_delivery = TRUE;
2920 /* -qf...: Run the queue, forcing deliveries
2921 -qff..: Ditto, forcing thawing as well */
2923 if (*argrest == 'f')
2925 queue_run_force = TRUE;
2926 if (*(++argrest) == 'f')
2928 deliver_force_thaw = TRUE;
2933 /* -q[f][f]l...: Run the queue only on local deliveries */
2935 if (*argrest == 'l')
2937 queue_run_local = TRUE;
2941 /* -q[f][f][l]: Run the queue, optionally forced, optionally local only,
2942 optionally starting from a given message id. */
2944 if (*argrest == 0 &&
2945 (i + 1 >= argc || argv[i+1][0] == '-' || mac_ismsgid(argv[i+1])))
2948 if (i+1 < argc && mac_ismsgid(argv[i+1]))
2949 start_queue_run_id = argv[++i];
2950 if (i+1 < argc && mac_ismsgid(argv[i+1]))
2951 stop_queue_run_id = argv[++i];
2954 /* -q[f][f][l]<n>: Run the queue at regular intervals, optionally forced,
2955 optionally local only. */
2960 queue_interval = readconf_readtime(argrest, 0, FALSE);
2962 queue_interval = readconf_readtime(argv[++i], 0, FALSE);
2963 if (queue_interval <= 0)
2965 fprintf(stderr, "exim: bad time value %s: abandoned\n", argv[i]);
2972 case 'R': /* Synonymous with -qR... */
2973 receiving_message = FALSE;
2975 /* -Rf: As -R (below) but force all deliveries,
2976 -Rff: Ditto, but also thaw all frozen messages,
2977 -Rr: String is regex
2978 -Rrf: Regex and force
2979 -Rrff: Regex and force and thaw
2981 in all cases provided there are no further characters in this
2987 for (i = 0; i < sizeof(rsopts)/sizeof(uschar *); i++)
2989 if (Ustrcmp(argrest, rsopts[i]) == 0)
2991 if (i != 2) queue_run_force = TRUE;
2992 if (i >= 2) deliver_selectstring_regex = TRUE;
2993 if (i == 1 || i == 4) deliver_force_thaw = TRUE;
2994 argrest += Ustrlen(rsopts[i]);
2999 /* -R: Set string to match in addresses for forced queue run to
3000 pick out particular messages. */
3004 if (i+1 < argc) deliver_selectstring = argv[++i]; else
3006 fprintf(stderr, "exim: string expected after -R\n");
3010 else deliver_selectstring = argrest;
3014 /* -r: an obsolete synonym for -f (see above) */
3017 /* -S: Like -R but works on sender. */
3019 case 'S': /* Synonymous with -qS... */
3020 receiving_message = FALSE;
3022 /* -Sf: As -S (below) but force all deliveries,
3023 -Sff: Ditto, but also thaw all frozen messages,
3024 -Sr: String is regex
3025 -Srf: Regex and force
3026 -Srff: Regex and force and thaw
3028 in all cases provided there are no further characters in this
3034 for (i = 0; i < sizeof(rsopts)/sizeof(uschar *); i++)
3036 if (Ustrcmp(argrest, rsopts[i]) == 0)
3038 if (i != 2) queue_run_force = TRUE;
3039 if (i >= 2) deliver_selectstring_sender_regex = TRUE;
3040 if (i == 1 || i == 4) deliver_force_thaw = TRUE;
3041 argrest += Ustrlen(rsopts[i]);
3046 /* -S: Set string to match in addresses for forced queue run to
3047 pick out particular messages. */
3051 if (i+1 < argc) deliver_selectstring_sender = argv[++i]; else
3053 fprintf(stderr, "exim: string expected after -S\n");
3057 else deliver_selectstring_sender = argrest;
3060 /* -Tqt is an option that is exclusively for use by the testing suite.
3061 It is not recognized in other circumstances. It allows for the setting up
3062 of explicit "queue times" so that various warning/retry things can be
3063 tested. Otherwise variability of clock ticks etc. cause problems. */
3066 if (running_in_test_harness && Ustrcmp(argrest, "qt") == 0)
3067 fudged_queue_times = argv[++i];
3072 /* -t: Set flag to extract recipients from body of message. */
3075 if (*argrest == 0) extract_recipients = TRUE;
3077 /* -ti: Set flag to extract recipients from body of message, and also
3078 specify that dot does not end the message. */
3080 else if (Ustrcmp(argrest, "i") == 0)
3082 extract_recipients = TRUE;
3086 /* -tls-on-connect: don't wait for STARTTLS (for old clients) */
3089 else if (Ustrcmp(argrest, "ls-on-connect") == 0) tls_on_connect = TRUE;
3096 /* -U: This means "initial user submission" in sendmail, apparently. The
3097 doc claims that in future sendmail may refuse syntactically invalid
3098 messages instead of fixing them. For the moment, we just ignore it. */
3104 /* -v: verify things - this is a very low-level debugging */
3109 debug_selector |= D_v;
3110 debug_file = stderr;
3116 /* -x: AIX uses this to indicate some fancy 8-bit character stuff:
3118 The -x flag tells the sendmail command that mail from a local
3119 mail program has National Language Support (NLS) extended characters
3120 in the body of the mail item. The sendmail command can send mail with
3121 extended NLS characters across networks that normally corrupts these
3124 As Exim is 8-bit clean, it just ignores this flag. */
3127 if (*argrest != 0) badarg = TRUE;
3130 /* All other initial characters are errors */
3135 } /* End of high-level switch statement */
3137 /* Failed to recognize the option, or syntax error */
3141 fprintf(stderr, "exim abandoned: unknown, malformed, or incomplete "
3142 "option %s\n", arg);
3148 /* If -R or -S have been specified without -q, assume a single queue run. */
3150 if ((deliver_selectstring != NULL || deliver_selectstring_sender != NULL) &&
3151 queue_interval < 0) queue_interval = 0;
3155 /* If usage_wanted is set we call the usage function - which never returns */
3156 if (usage_wanted) exim_usage(called_as);
3158 /* Arguments have been processed. Check for incompatibilities. */
3160 (smtp_input || extract_recipients || recipients_arg < argc) &&
3161 (daemon_listen || queue_interval >= 0 || bi_option ||
3162 test_retry_arg >= 0 || test_rewrite_arg >= 0 ||
3163 filter_test != FTEST_NONE || (msg_action_arg > 0 && !one_msg_action))
3166 msg_action_arg > 0 &&
3167 (daemon_listen || queue_interval >= 0 || list_options ||
3168 (checking && msg_action != MSG_LOAD) ||
3169 bi_option || test_retry_arg >= 0 || test_rewrite_arg >= 0)
3172 (daemon_listen || queue_interval >= 0) &&
3173 (sender_address != NULL || list_options || list_queue || checking ||
3177 daemon_listen && queue_interval == 0
3181 (checking || smtp_input || extract_recipients ||
3182 filter_test != FTEST_NONE || bi_option)
3185 verify_address_mode &&
3186 (address_test_mode || smtp_input || extract_recipients ||
3187 filter_test != FTEST_NONE || bi_option)
3190 address_test_mode && (smtp_input || extract_recipients ||
3191 filter_test != FTEST_NONE || bi_option)
3194 smtp_input && (sender_address != NULL || filter_test != FTEST_NONE ||
3198 deliver_selectstring != NULL && queue_interval < 0
3201 msg_action == MSG_LOAD &&
3202 (!expansion_test || expansion_test_message != NULL)
3206 fprintf(stderr, "exim: incompatible command-line options or arguments\n");
3210 /* If debugging is set up, set the file and the file descriptor to pass on to
3211 child processes. It should, of course, be 2 for stderr. Also, force the daemon
3212 to run in the foreground. */
3214 if (debug_selector != 0)
3216 debug_file = stderr;
3217 debug_fd = fileno(debug_file);
3218 background_daemon = FALSE;
3219 if (running_in_test_harness) millisleep(100); /* lets caller finish */
3220 if (debug_selector != D_v) /* -v only doesn't show this */
3222 debug_printf("Exim version %s uid=%ld gid=%ld pid=%d D=%x\n",
3223 version_string, (long int)real_uid, (long int)real_gid, (int)getpid(),
3225 if (!version_printed)
3226 show_whats_supported(stderr);
3230 /* When started with root privilege, ensure that the limits on the number of
3231 open files and the number of processes (where that is accessible) are
3232 sufficiently large, or are unset, in case Exim has been called from an
3233 environment where the limits are screwed down. Not all OS have the ability to
3234 change some of these limits. */
3238 DEBUG(D_any) debug_print_ids(US"Exim has no root privilege:");
3244 #ifdef RLIMIT_NOFILE
3245 if (getrlimit(RLIMIT_NOFILE, &rlp) < 0)
3247 log_write(0, LOG_MAIN|LOG_PANIC, "getrlimit(RLIMIT_NOFILE) failed: %s",
3249 rlp.rlim_cur = rlp.rlim_max = 0;
3252 /* I originally chose 1000 as a nice big number that was unlikely to
3253 be exceeded. It turns out that some older OS have a fixed upper limit of
3256 if (rlp.rlim_cur < 1000)
3258 rlp.rlim_cur = rlp.rlim_max = 1000;
3259 if (setrlimit(RLIMIT_NOFILE, &rlp) < 0)
3261 rlp.rlim_cur = rlp.rlim_max = 256;
3262 if (setrlimit(RLIMIT_NOFILE, &rlp) < 0)
3263 log_write(0, LOG_MAIN|LOG_PANIC, "setrlimit(RLIMIT_NOFILE) failed: %s",
3270 if (getrlimit(RLIMIT_NPROC, &rlp) < 0)
3272 log_write(0, LOG_MAIN|LOG_PANIC, "getrlimit(RLIMIT_NPROC) failed: %s",
3274 rlp.rlim_cur = rlp.rlim_max = 0;
3277 #ifdef RLIM_INFINITY
3278 if (rlp.rlim_cur != RLIM_INFINITY && rlp.rlim_cur < 1000)
3280 rlp.rlim_cur = rlp.rlim_max = RLIM_INFINITY;
3282 if (rlp.rlim_cur < 1000)
3284 rlp.rlim_cur = rlp.rlim_max = 1000;
3286 if (setrlimit(RLIMIT_NPROC, &rlp) < 0)
3287 log_write(0, LOG_MAIN|LOG_PANIC, "setrlimit(RLIMIT_NPROC) failed: %s",
3293 /* Exim is normally entered as root (but some special configurations are
3294 possible that don't do this). However, it always spins off sub-processes that
3295 set their uid and gid as required for local delivery. We don't want to pass on
3296 any extra groups that root may belong to, so we want to get rid of them all at
3299 We need to obey setgroups() at this stage, before possibly giving up root
3300 privilege for a changed configuration file, but later on we might need to
3301 check on the additional groups for the admin user privilege - can't do that
3302 till after reading the config, which might specify the exim gid. Therefore,
3303 save the group list here first. */
3305 group_count = getgroups(NGROUPS_MAX, group_list);
3306 if (group_count < 0)
3308 fprintf(stderr, "exim: getgroups() failed: %s\n", strerror(errno));
3312 /* There is a fundamental difference in some BSD systems in the matter of
3313 groups. FreeBSD and BSDI are known to be different; NetBSD and OpenBSD are
3314 known not to be different. On the "different" systems there is a single group
3315 list, and the first entry in it is the current group. On all other versions of
3316 Unix there is a supplementary group list, which is in *addition* to the current
3317 group. Consequently, to get rid of all extraneous groups on a "standard" system
3318 you pass over 0 groups to setgroups(), while on a "different" system you pass
3319 over a single group - the current group, which is always the first group in the
3320 list. Calling setgroups() with zero groups on a "different" system results in
3321 an error return. The following code should cope with both types of system.
3323 However, if this process isn't running as root, setgroups() can't be used
3324 since you have to be root to run it, even if throwing away groups. Not being
3325 root here happens only in some unusual configurations. We just ignore the
3328 if (setgroups(0, NULL) != 0)
3330 if (setgroups(1, group_list) != 0 && !unprivileged)
3332 fprintf(stderr, "exim: setgroups() failed: %s\n", strerror(errno));
3337 /* If the configuration file name has been altered by an argument on the
3338 command line (either a new file name or a macro definition) and the caller is
3339 not root, or if this is a filter testing run, remove any setuid privilege the
3340 program has and run as the underlying user.
3342 The exim user is locked out of this, which severely restricts the use of -C
3345 Otherwise, set the real ids to the effective values (should be root unless run
3346 from inetd, which it can either be root or the exim uid, if one is configured).
3348 There is a private mechanism for bypassing some of this, in order to make it
3349 possible to test lots of configurations automatically, without having either to
3350 recompile each time, or to patch in an actual configuration file name and other
3351 values (such as the path name). If running in the test harness, pretend that
3352 configuration file changes and macro definitions haven't happened. */
3355 (!trusted_config || /* Config changed, or */
3356 !macros_trusted()) && /* impermissible macros and */
3357 real_uid != root_uid && /* Not root, and */
3358 !running_in_test_harness /* Not fudged */
3360 expansion_test /* expansion testing */
3362 filter_test != FTEST_NONE) /* Filter testing */
3364 setgroups(group_count, group_list);
3365 exim_setugid(real_uid, real_gid, FALSE,
3366 US"-C, -D, -be or -bf forces real uid");
3367 removed_privilege = TRUE;
3369 /* In the normal case when Exim is called like this, stderr is available
3370 and should be used for any logging information because attempts to write
3371 to the log will usually fail. To arrange this, we unset really_exim. However,
3372 if no stderr is available there is no point - we might as well have a go
3373 at the log (if it fails, syslog will be written).
3375 Note that if the invoker is Exim, the logs remain available. Messing with
3376 this causes unlogged successful deliveries. */
3378 if ((log_stderr != NULL) && (real_uid != exim_uid))
3379 really_exim = FALSE;
3382 /* Privilege is to be retained for the moment. It may be dropped later,
3383 depending on the job that this Exim process has been asked to do. For now, set
3384 the real uid to the effective so that subsequent re-execs of Exim are done by a
3387 else exim_setugid(geteuid(), getegid(), FALSE, US"forcing real = effective");
3389 /* If testing a filter, open the file(s) now, before wasting time doing other
3390 setups and reading the message. */
3392 if ((filter_test & FTEST_SYSTEM) != 0)
3394 filter_sfd = Uopen(filter_test_sfile, O_RDONLY, 0);
3397 fprintf(stderr, "exim: failed to open %s: %s\n", filter_test_sfile,
3399 return EXIT_FAILURE;
3403 if ((filter_test & FTEST_USER) != 0)
3405 filter_ufd = Uopen(filter_test_ufile, O_RDONLY, 0);
3408 fprintf(stderr, "exim: failed to open %s: %s\n", filter_test_ufile,
3410 return EXIT_FAILURE;
3414 /* Read the main runtime configuration data; this gives up if there
3415 is a failure. It leaves the configuration file open so that the subsequent
3416 configuration data for delivery can be read if needed. */
3420 /* Handle the decoding of logging options. */
3422 decode_bits(&log_write_selector, &log_extra_selector, 0, 0,
3423 log_selector_string, log_options, log_options_count, US"log", 0);
3427 debug_printf("configuration file is %s\n", config_main_filename);
3428 debug_printf("log selectors = %08x %08x\n", log_write_selector,
3429 log_extra_selector);
3432 /* If domain literals are not allowed, check the sender address that was
3433 supplied with -f. Ditto for a stripped trailing dot. */
3435 if (sender_address != NULL)
3437 if (sender_address[sender_address_domain] == '[' && !allow_domain_literals)
3439 fprintf(stderr, "exim: bad -f address \"%s\": domain literals not "
3440 "allowed\n", sender_address);
3441 return EXIT_FAILURE;
3443 if (f_end_dot && !strip_trailing_dot)
3445 fprintf(stderr, "exim: bad -f address \"%s.\": domain is malformed "
3446 "(trailing dot not allowed)\n", sender_address);
3447 return EXIT_FAILURE;
3451 /* Paranoia check of maximum lengths of certain strings. There is a check
3452 on the length of the log file path in log.c, which will come into effect
3453 if there are any calls to write the log earlier than this. However, if we
3454 get this far but the string is very long, it is better to stop now than to
3455 carry on and (e.g.) receive a message and then have to collapse. The call to
3456 log_write() from here will cause the ultimate panic collapse if the complete
3457 file name exceeds the buffer length. */
3459 if (Ustrlen(log_file_path) > 200)
3460 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3461 "log_file_path is longer than 200 chars: aborting");
3463 if (Ustrlen(pid_file_path) > 200)
3464 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3465 "pid_file_path is longer than 200 chars: aborting");
3467 if (Ustrlen(spool_directory) > 200)
3468 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3469 "spool_directory is longer than 200 chars: aborting");
3471 /* Length check on the process name given to syslog for its TAG field,
3472 which is only permitted to be 32 characters or less. See RFC 3164. */
3474 if (Ustrlen(syslog_processname) > 32)
3475 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3476 "syslog_processname is longer than 32 chars: aborting");
3478 /* In some operating systems, the environment variable TMPDIR controls where
3479 temporary files are created; Exim doesn't use these (apart from when delivering
3480 to MBX mailboxes), but called libraries such as DBM libraries may require them.
3481 If TMPDIR is found in the environment, reset it to the value defined in the
3482 TMPDIR macro, if this macro is defined. */
3487 for (p = USS environ; *p != NULL; p++)
3489 if (Ustrncmp(*p, "TMPDIR=", 7) == 0 &&
3490 Ustrcmp(*p+7, TMPDIR) != 0)
3492 uschar *newp = malloc(Ustrlen(TMPDIR) + 8);
3493 sprintf(CS newp, "TMPDIR=%s", TMPDIR);
3495 DEBUG(D_any) debug_printf("reset TMPDIR=%s in environment\n", TMPDIR);
3501 /* Timezone handling. If timezone_string is "utc", set a flag to cause all
3502 timestamps to be in UTC (gmtime() is used instead of localtime()). Otherwise,
3503 we may need to get rid of a bogus timezone setting. This can arise when Exim is
3504 called by a user who has set the TZ variable. This then affects the timestamps
3505 in log files and in Received: headers, and any created Date: header lines. The
3506 required timezone is settable in the configuration file, so nothing can be done
3507 about this earlier - but hopefully nothing will normally be logged earlier than
3508 this. We have to make a new environment if TZ is wrong, but don't bother if
3509 timestamps_utc is set, because then all times are in UTC anyway. */
3511 if (timezone_string != NULL && strcmpic(timezone_string, US"UTC") == 0)
3513 timestamps_utc = TRUE;
3517 uschar *envtz = US getenv("TZ");
3518 if ((envtz == NULL && timezone_string != NULL) ||
3520 (timezone_string == NULL ||
3521 Ustrcmp(timezone_string, envtz) != 0)))
3523 uschar **p = USS environ;
3527 while (*p++ != NULL) count++;
3528 if (envtz == NULL) count++;
3529 newp = new = malloc(sizeof(uschar *) * (count + 1));
3530 for (p = USS environ; *p != NULL; p++)
3532 if (Ustrncmp(*p, "TZ=", 3) == 0) continue;
3535 if (timezone_string != NULL)
3537 *newp = malloc(Ustrlen(timezone_string) + 4);
3538 sprintf(CS *newp++, "TZ=%s", timezone_string);
3543 DEBUG(D_any) debug_printf("Reset TZ to %s: time is %s\n", timezone_string,
3544 tod_stamp(tod_log));
3548 /* Handle the case when we have removed the setuid privilege because of -C or
3549 -D. This means that the caller of Exim was not root.
3551 There is a problem if we were running as the Exim user. The sysadmin may
3552 expect this case to retain privilege because "the binary was called by the
3553 Exim user", but it hasn't, because either the -D option set macros, or the
3554 -C option set a non-trusted configuration file. There are two possibilities:
3556 (1) If deliver_drop_privilege is set, Exim is not going to re-exec in order
3557 to do message deliveries. Thus, the fact that it is running as a
3558 non-privileged user is plausible, and might be wanted in some special
3559 configurations. However, really_exim will have been set false when
3560 privilege was dropped, to stop Exim trying to write to its normal log
3561 files. Therefore, re-enable normal log processing, assuming the sysadmin
3562 has set up the log directory correctly.
3564 (2) If deliver_drop_privilege is not set, the configuration won't work as
3565 apparently intended, and so we log a panic message. In order to retain
3566 root for -C or -D, the caller must either be root or be invoking a
3567 trusted configuration file (when deliver_drop_privilege is false). */
3569 if (removed_privilege && (!trusted_config || macros != NULL) &&
3570 real_uid == exim_uid)
3572 if (deliver_drop_privilege)
3573 really_exim = TRUE; /* let logging work normally */
3575 log_write(0, LOG_MAIN|LOG_PANIC,
3576 "exim user lost privilege for using %s option",
3577 trusted_config? "-D" : "-C");
3580 /* Start up Perl interpreter if Perl support is configured and there is a
3581 perl_startup option, and the configuration or the command line specifies
3582 initializing starting. Note that the global variables are actually called
3583 opt_perl_xxx to avoid clashing with perl's namespace (perl_*). */
3586 if (perl_start_option != 0)
3587 opt_perl_at_start = (perl_start_option > 0);
3588 if (opt_perl_at_start && opt_perl_startup != NULL)
3591 DEBUG(D_any) debug_printf("Starting Perl interpreter\n");
3592 errstr = init_perl(opt_perl_startup);
3595 fprintf(stderr, "exim: error in perl_startup code: %s\n", errstr);
3596 return EXIT_FAILURE;
3598 opt_perl_started = TRUE;
3600 #endif /* EXIM_PERL */
3602 /* Initialise lookup_list
3603 If debugging, already called above via version reporting.
3604 This does mean that debugging causes the list to be initialised while root.
3605 This *should* be harmless -- all modules are loaded from a fixed dir and
3606 it's code that would, if not a module, be part of Exim already. */
3609 /* Log the arguments of the call if the configuration file said so. This is
3610 a debugging feature for finding out what arguments certain MUAs actually use.
3611 Don't attempt it if logging is disabled, or if listing variables or if
3612 verifying/testing addresses or expansions. */
3614 if (((debug_selector & D_any) != 0 || (log_extra_selector & LX_arguments) != 0)
3615 && really_exim && !list_options && !checking)
3618 uschar *p = big_buffer;
3620 (void)getcwd(CS p+4, big_buffer_size - 4);
3622 (void)string_format(p, big_buffer_size - (p - big_buffer), " %d args:", argc);
3624 for (i = 0; i < argc; i++)
3626 int len = Ustrlen(argv[i]);
3629 if (p + len + 8 >= big_buffer + big_buffer_size)
3632 log_write(0, LOG_MAIN, "%s", big_buffer);
3633 Ustrcpy(big_buffer, "...");
3636 printing = string_printing(argv[i]);
3637 if (printing[0] == 0) quote = US"\""; else
3639 uschar *pp = printing;
3641 while (*pp != 0) if (isspace(*pp++)) { quote = US"\""; break; }
3643 sprintf(CS p, " %s%.*s%s", quote, (int)(big_buffer_size -
3644 (p - big_buffer) - 4), printing, quote);
3648 if ((log_extra_selector & LX_arguments) != 0)
3649 log_write(0, LOG_MAIN, "%s", big_buffer);
3651 debug_printf("%s\n", big_buffer);
3654 /* Set the working directory to be the top-level spool directory. We don't rely
3655 on this in the code, which always uses fully qualified names, but it's useful
3656 for core dumps etc. Don't complain if it fails - the spool directory might not
3657 be generally accessible and calls with the -C option (and others) have lost
3658 privilege by now. Before the chdir, we try to ensure that the directory exists.
3661 if (Uchdir(spool_directory) != 0)
3663 (void)directory_make(spool_directory, US"", SPOOL_DIRECTORY_MODE, FALSE);
3664 (void)Uchdir(spool_directory);
3667 /* Handle calls with the -bi option. This is a sendmail option to rebuild *the*
3668 alias file. Exim doesn't have such a concept, but this call is screwed into
3669 Sun's YP makefiles. Handle this by calling a configured script, as the real
3670 user who called Exim. The -oA option can be used to pass an argument to the
3675 (void)fclose(config_file);
3676 if (bi_command != NULL)
3680 argv[i++] = bi_command;
3681 if (alias_arg != NULL) argv[i++] = alias_arg;
3684 setgroups(group_count, group_list);
3685 exim_setugid(real_uid, real_gid, FALSE, US"running bi_command");
3687 DEBUG(D_exec) debug_printf("exec %.256s %.256s\n", argv[0],
3688 (argv[1] == NULL)? US"" : argv[1]);
3690 execv(CS argv[0], (char *const *)argv);
3691 fprintf(stderr, "exim: exec failed: %s\n", strerror(errno));
3696 DEBUG(D_any) debug_printf("-bi used but bi_command not set; exiting\n");
3701 /* If an action on specific messages is requested, or if a daemon or queue
3702 runner is being started, we need to know if Exim was called by an admin user.
3703 This is the case if the real user is root or exim, or if the real group is
3704 exim, or if one of the supplementary groups is exim or a group listed in
3705 admin_groups. We don't fail all message actions immediately if not admin_user,
3706 since some actions can be performed by non-admin users. Instead, set admin_user
3707 for later interrogation. */
3709 if (real_uid == root_uid || real_uid == exim_uid || real_gid == exim_gid)
3714 for (i = 0; i < group_count; i++)
3716 if (group_list[i] == exim_gid) admin_user = TRUE;
3717 else if (admin_groups != NULL)
3719 for (j = 1; j <= (int)(admin_groups[0]); j++)
3720 if (admin_groups[j] == group_list[i])
3721 { admin_user = TRUE; break; }
3723 if (admin_user) break;
3727 /* Another group of privileged users are the trusted users. These are root,
3728 exim, and any caller matching trusted_users or trusted_groups. Trusted callers
3729 are permitted to specify sender_addresses with -f on the command line, and
3730 other message parameters as well. */
3732 if (real_uid == root_uid || real_uid == exim_uid)
3733 trusted_caller = TRUE;
3738 if (trusted_users != NULL)
3740 for (i = 1; i <= (int)(trusted_users[0]); i++)
3741 if (trusted_users[i] == real_uid)
3742 { trusted_caller = TRUE; break; }
3745 if (!trusted_caller && trusted_groups != NULL)
3747 for (i = 1; i <= (int)(trusted_groups[0]); i++)
3749 if (trusted_groups[i] == real_gid)
3750 trusted_caller = TRUE;
3751 else for (j = 0; j < group_count; j++)
3753 if (trusted_groups[i] == group_list[j])
3754 { trusted_caller = TRUE; break; }
3756 if (trusted_caller) break;
3761 if (trusted_caller) DEBUG(D_any) debug_printf("trusted user\n");
3762 if (admin_user) DEBUG(D_any) debug_printf("admin user\n");
3764 /* Only an admin user may start the daemon or force a queue run in the default
3765 configuration, but the queue run restriction can be relaxed. Only an admin
3766 user may request that a message be returned to its sender forthwith. Only an
3767 admin user may specify a debug level greater than D_v (because it might show
3768 passwords, etc. in lookup queries). Only an admin user may request a queue
3769 count. Only an admin user can use the test interface to scan for email
3770 (because Exim will be in the spool dir and able to look at mails). */
3774 BOOL debugset = (debug_selector & ~D_v) != 0;
3775 if (deliver_give_up || daemon_listen || malware_test_file ||
3776 (count_queue && queue_list_requires_admin) ||
3777 (list_queue && queue_list_requires_admin) ||
3778 (queue_interval >= 0 && prod_requires_admin) ||
3779 (debugset && !running_in_test_harness))
3781 fprintf(stderr, "exim:%s permission denied\n", debugset? " debugging" : "");
3786 /* If the real user is not root or the exim uid, the argument for passing
3787 in an open TCP/IP connection for another message is not permitted, nor is
3788 running with the -N option for any delivery action, unless this call to exim is
3789 one that supplied an input message, or we are using a patched exim for
3790 regression testing. */
3792 if (real_uid != root_uid && real_uid != exim_uid &&
3793 (continue_hostname != NULL ||
3795 (queue_interval >= 0 || daemon_listen || msg_action_arg > 0)
3796 )) && !running_in_test_harness)
3798 fprintf(stderr, "exim: Permission denied\n");
3799 return EXIT_FAILURE;
3802 /* If the caller is not trusted, certain arguments are ignored when running for
3803 real, but are permitted when checking things (-be, -bv, -bt, -bh, -bf, -bF).
3804 Note that authority for performing certain actions on messages is tested in the
3805 queue_action() function. */
3807 if (!trusted_caller && !checking && filter_test == FTEST_NONE)
3809 sender_host_name = sender_host_address = interface_address =
3810 sender_ident = received_protocol = NULL;
3811 sender_host_port = interface_port = 0;
3812 sender_host_authenticated = authenticated_sender = authenticated_id = NULL;
3815 /* If a sender host address is set, extract the optional port number off the
3816 end of it and check its syntax. Do the same thing for the interface address.
3817 Exim exits if the syntax is bad. */
3821 if (sender_host_address != NULL)
3822 sender_host_port = check_port(sender_host_address);
3823 if (interface_address != NULL)
3824 interface_port = check_port(interface_address);
3827 /* If an SMTP message is being received check to see if the standard input is a
3828 TCP/IP socket. If it is, we assume that Exim was called from inetd if the
3829 caller is root or the Exim user, or if the port is a privileged one. Otherwise,
3834 union sockaddr_46 inetd_sock;
3835 EXIM_SOCKLEN_T size = sizeof(inetd_sock);
3836 if (getpeername(0, (struct sockaddr *)(&inetd_sock), &size) == 0)
3838 int family = ((struct sockaddr *)(&inetd_sock))->sa_family;
3839 if (family == AF_INET || family == AF_INET6)
3841 union sockaddr_46 interface_sock;
3842 size = sizeof(interface_sock);
3844 if (getsockname(0, (struct sockaddr *)(&interface_sock), &size) == 0)
3845 interface_address = host_ntoa(-1, &interface_sock, NULL,
3848 if (host_is_tls_on_connect_port(interface_port)) tls_on_connect = TRUE;
3850 if (real_uid == root_uid || real_uid == exim_uid || interface_port < 1024)
3853 sender_host_address = host_ntoa(-1, (struct sockaddr *)(&inetd_sock),
3854 NULL, &sender_host_port);
3855 if (mua_wrapper) log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Input from "
3856 "inetd is not supported when mua_wrapper is set");
3861 "exim: Permission denied (unprivileged user, unprivileged port)\n");
3862 return EXIT_FAILURE;
3868 /* If the load average is going to be needed while receiving a message, get it
3869 now for those OS that require the first call to os_getloadavg() to be done as
3870 root. There will be further calls later for each message received. */
3872 #ifdef LOAD_AVG_NEEDS_ROOT
3873 if (receiving_message &&
3874 (queue_only_load >= 0 ||
3875 (is_inetd && smtp_load_reserve >= 0)
3878 load_average = OS_GETLOADAVG();
3882 /* The queue_only configuration option can be overridden by -odx on the command
3883 line, except that if queue_only_override is false, queue_only cannot be unset
3884 from the command line. */
3886 if (queue_only_set && (queue_only_override || arg_queue_only))
3887 queue_only = arg_queue_only;
3889 /* The receive_timeout and smtp_receive_timeout options can be overridden by
3892 if (arg_receive_timeout >= 0) receive_timeout = arg_receive_timeout;
3893 if (arg_smtp_receive_timeout >= 0)
3894 smtp_receive_timeout = arg_smtp_receive_timeout;
3896 /* If Exim was started with root privilege, unless we have already removed the
3897 root privilege above as a result of -C, -D, -be, -bf or -bF, remove it now
3898 except when starting the daemon or doing some kind of delivery or address
3899 testing (-bt). These are the only cases when root need to be retained. We run
3900 as exim for -bv and -bh. However, if deliver_drop_privilege is set, root is
3901 retained only for starting the daemon. We always do the initgroups() in this
3902 situation (controlled by the TRUE below), in order to be as close as possible
3903 to the state Exim usually runs in. */
3905 if (!unprivileged && /* originally had root AND */
3906 !removed_privilege && /* still got root AND */
3907 !daemon_listen && /* not starting the daemon */
3908 queue_interval <= 0 && /* (either kind of daemon) */
3910 deliver_drop_privilege || /* requested unprivileged */
3912 queue_interval < 0 && /* not running the queue */
3913 (msg_action_arg < 0 || /* and */
3914 msg_action != MSG_DELIVER) && /* not delivering and */
3915 (!checking || !address_test_mode) /* not address checking */
3919 exim_setugid(exim_uid, exim_gid, TRUE, US"privilege not needed");
3922 /* When we are retaining a privileged uid, we still change to the exim gid. */
3927 rv = setgid(exim_gid);
3928 /* Impact of failure is that some stuff might end up with an incorrect group.
3929 We track this for failures from root, since any attempt to change privilege
3930 by root should succeed and failures should be examined. For non-root,
3931 there's no security risk. For me, it's { exim -bV } on a just-built binary,
3932 no need to complain then. */
3935 if (!(unprivileged || removed_privilege))
3938 "exim: changing group failed: %s\n", strerror(errno));
3942 DEBUG(D_any) debug_printf("changing group to %ld failed: %s\n",
3943 (long int)exim_gid, strerror(errno));
3947 /* Handle a request to scan a file for malware */
3948 if (malware_test_file)
3950 #ifdef WITH_CONTENT_SCAN
3952 set_process_info("scanning file for malware");
3953 result = malware_in_file(malware_test_file);
3956 printf("No malware found.\n");
3961 printf("Malware lookup returned non-okay/fail: %d\n", result);
3965 printf("Malware found: %s\n", malware_name);
3967 printf("Malware scan detected malware of unknown name.\n");
3969 printf("Malware scanning not enabled at compile time.\n");
3974 /* Handle a request to list the delivery queue */
3978 set_process_info("listing the queue");
3979 queue_list(list_queue_option, argv + recipients_arg, argc - recipients_arg);
3983 /* Handle a request to count the delivery queue */
3987 set_process_info("counting the queue");
3992 /* Handle actions on specific messages, except for the force delivery and
3993 message load actions, which are done below. Some actions take a whole list of
3994 message ids, which are known to continue up to the end of the arguments. Others
3995 take a single message id and then operate on the recipients list. */
3997 if (msg_action_arg > 0 && msg_action != MSG_DELIVER && msg_action != MSG_LOAD)
3999 int yield = EXIT_SUCCESS;
4000 set_process_info("acting on specified messages");
4002 if (!one_msg_action)
4004 for (i = msg_action_arg; i < argc; i++)
4005 if (!queue_action(argv[i], msg_action, NULL, 0, 0))
4006 yield = EXIT_FAILURE;
4009 else if (!queue_action(argv[msg_action_arg], msg_action, argv, argc,
4010 recipients_arg)) yield = EXIT_FAILURE;
4014 /* All the modes below here require the remaining configuration sections
4015 to be read, except that we can skip over the ACL setting when delivering
4016 specific messages, or doing a queue run. (For various testing cases we could
4017 skip too, but as they are rare, it doesn't really matter.) The argument is TRUE
4020 readconf_rest(msg_action_arg > 0 || (queue_interval == 0 && !daemon_listen));
4022 /* The configuration data will have been read into POOL_PERM because we won't
4023 ever want to reset back past it. Change the current pool to POOL_MAIN. In fact,
4024 this is just a bit of pedantic tidiness. It wouldn't really matter if the
4025 configuration were read into POOL_MAIN, because we don't do any resets till
4026 later on. However, it seems right, and it does ensure that both pools get used.
4029 store_pool = POOL_MAIN;
4031 /* Handle the -brt option. This is for checking out retry configurations.
4032 The next three arguments are a domain name or a complete address, and
4033 optionally two error numbers. All it does is to call the function that
4034 scans the retry configuration data. */
4036 if (test_retry_arg >= 0)
4038 retry_config *yield;
4039 int basic_errno = 0;
4043 if (test_retry_arg >= argc)
4045 printf("-brt needs a domain or address argument\n");
4046 exim_exit(EXIT_FAILURE);
4048 s1 = argv[test_retry_arg++];
4051 /* If the first argument contains no @ and no . it might be a local user
4052 or it might be a single-component name. Treat as a domain. */
4054 if (Ustrchr(s1, '@') == NULL && Ustrchr(s1, '.') == NULL)
4056 printf("Warning: \"%s\" contains no '@' and no '.' characters. It is "
4057 "being \ntreated as a one-component domain, not as a local part.\n\n",
4061 /* There may be an optional second domain arg. */
4063 if (test_retry_arg < argc && Ustrchr(argv[test_retry_arg], '.') != NULL)
4064 s2 = argv[test_retry_arg++];
4066 /* The final arg is an error name */
4068 if (test_retry_arg < argc)
4070 uschar *ss = argv[test_retry_arg];
4072 readconf_retry_error(ss, ss + Ustrlen(ss), &basic_errno, &more_errno);
4075 printf("%s\n", CS error);
4076 return EXIT_FAILURE;
4079 /* For the {MAIL,RCPT,DATA}_4xx errors, a value of 255 means "any", and a
4080 code > 100 as an error is for matching codes to the decade. Turn them into
4081 a real error code, off the decade. */
4083 if (basic_errno == ERRNO_MAIL4XX ||
4084 basic_errno == ERRNO_RCPT4XX ||
4085 basic_errno == ERRNO_DATA4XX)
4087 int code = (more_errno >> 8) & 255;
4089 more_errno = (more_errno & 0xffff00ff) | (21 << 8);
4090 else if (code > 100)
4091 more_errno = (more_errno & 0xffff00ff) | ((code - 96) << 8);
4095 yield = retry_find_config(s1, s2, basic_errno, more_errno);
4096 if (yield == NULL) printf("No retry information found\n"); else
4099 more_errno = yield->more_errno;
4100 printf("Retry rule: %s ", yield->pattern);
4102 if (yield->basic_errno == ERRNO_EXIMQUOTA)
4104 printf("quota%s%s ",
4105 (more_errno > 0)? "_" : "",
4106 (more_errno > 0)? readconf_printtime(more_errno) : US"");
4108 else if (yield->basic_errno == ECONNREFUSED)
4110 printf("refused%s%s ",
4111 (more_errno > 0)? "_" : "",
4112 (more_errno == 'M')? "MX" :
4113 (more_errno == 'A')? "A" : "");
4115 else if (yield->basic_errno == ETIMEDOUT)
4118 if ((more_errno & RTEF_CTOUT) != 0) printf("_connect");
4120 if (more_errno != 0) printf("_%s",
4121 (more_errno == 'M')? "MX" : "A");
4124 else if (yield->basic_errno == ERRNO_AUTHFAIL)
4125 printf("auth_failed ");
4128 for (r = yield->rules; r != NULL; r = r->next)
4130 printf("%c,%s", r->rule, readconf_printtime(r->timeout)); /* Do not */
4131 printf(",%s", readconf_printtime(r->p1)); /* amalgamate */
4137 printf(",%d.", x/1000);
4151 exim_exit(EXIT_SUCCESS);
4154 /* Handle a request to list one or more configuration options */
4158 set_process_info("listing variables");
4159 if (recipients_arg >= argc) readconf_print(US"all", NULL);
4160 else for (i = recipients_arg; i < argc; i++)
4163 (Ustrcmp(argv[i], "router") == 0 ||
4164 Ustrcmp(argv[i], "transport") == 0 ||
4165 Ustrcmp(argv[i], "authenticator") == 0 ||
4166 Ustrcmp(argv[i], "macro") == 0))
4168 readconf_print(argv[i+1], argv[i]);
4171 else readconf_print(argv[i], NULL);
4173 exim_exit(EXIT_SUCCESS);
4177 /* Handle a request to deliver one or more messages that are already on the
4178 queue. Values of msg_action other than MSG_DELIVER and MSG_LOAD are dealt with
4179 above. MSG_LOAD is handled with -be (which is the only time it applies) below.
4181 Delivery of specific messages is typically used for a small number when
4182 prodding by hand (when the option forced_delivery will be set) or when
4183 re-execing to regain root privilege. Each message delivery must happen in a
4184 separate process, so we fork a process for each one, and run them sequentially
4185 so that debugging output doesn't get intertwined, and to avoid spawning too
4186 many processes if a long list is given. However, don't fork for the last one;
4187 this saves a process in the common case when Exim is called to deliver just one
4190 if (msg_action_arg > 0 && msg_action != MSG_LOAD)
4192 if (prod_requires_admin && !admin_user)
4194 fprintf(stderr, "exim: Permission denied\n");
4195 exim_exit(EXIT_FAILURE);
4197 set_process_info("delivering specified messages");
4198 if (deliver_give_up) forced_delivery = deliver_force_thaw = TRUE;
4199 for (i = msg_action_arg; i < argc; i++)
4204 (void)deliver_message(argv[i], forced_delivery, deliver_give_up);
4205 else if ((pid = fork()) == 0)
4207 (void)deliver_message(argv[i], forced_delivery, deliver_give_up);
4208 _exit(EXIT_SUCCESS);
4212 fprintf(stderr, "failed to fork delivery process for %s: %s\n", argv[i],
4214 exim_exit(EXIT_FAILURE);
4218 exim_exit(EXIT_SUCCESS);
4222 /* If only a single queue run is requested, without SMTP listening, we can just
4223 turn into a queue runner, with an optional starting message id. */
4225 if (queue_interval == 0 && !daemon_listen)
4227 DEBUG(D_queue_run) debug_printf("Single queue run%s%s%s%s\n",
4228 (start_queue_run_id == NULL)? US"" : US" starting at ",
4229 (start_queue_run_id == NULL)? US"" : start_queue_run_id,
4230 (stop_queue_run_id == NULL)? US"" : US" stopping at ",
4231 (stop_queue_run_id == NULL)? US"" : stop_queue_run_id);
4232 set_process_info("running the queue (single queue run)");
4233 queue_run(start_queue_run_id, stop_queue_run_id, FALSE);
4234 exim_exit(EXIT_SUCCESS);
4238 /* Find the login name of the real user running this process. This is always
4239 needed when receiving a message, because it is written into the spool file. It
4240 may also be used to construct a from: or a sender: header, and in this case we
4241 need the user's full name as well, so save a copy of it, checked for RFC822
4242 syntax and munged if necessary, if it hasn't previously been set by the -F
4243 argument. We may try to get the passwd entry more than once, in case NIS or
4244 other delays are in evidence. Save the home directory for use in filter testing
4249 if ((pw = getpwuid(real_uid)) != NULL)
4251 originator_login = string_copy(US pw->pw_name);
4252 originator_home = string_copy(US pw->pw_dir);
4254 /* If user name has not been set by -F, set it from the passwd entry
4255 unless -f has been used to set the sender address by a trusted user. */
4257 if (originator_name == NULL)
4259 if (sender_address == NULL ||
4260 (!trusted_caller && filter_test == FTEST_NONE))
4262 uschar *name = US pw->pw_gecos;
4263 uschar *amp = Ustrchr(name, '&');
4266 /* Most Unix specify that a '&' character in the gecos field is
4267 replaced by a copy of the login name, and some even specify that
4268 the first character should be upper cased, so that's what we do. */
4273 string_format(buffer, sizeof(buffer), "%.*s%n%s%s",
4274 amp - name, name, &loffset, originator_login, amp + 1);
4275 buffer[loffset] = toupper(buffer[loffset]);
4279 /* If a pattern for matching the gecos field was supplied, apply
4280 it and then expand the name string. */
4282 if (gecos_pattern != NULL && gecos_name != NULL)
4285 re = regex_must_compile(gecos_pattern, FALSE, TRUE); /* Use malloc */
4287 if (regex_match_and_setup(re, name, 0, -1))
4289 uschar *new_name = expand_string(gecos_name);
4291 if (new_name != NULL)
4293 DEBUG(D_receive) debug_printf("user name \"%s\" extracted from "
4294 "gecos field \"%s\"\n", new_name, name);
4297 else DEBUG(D_receive) debug_printf("failed to expand gecos_name string "
4298 "\"%s\": %s\n", gecos_name, expand_string_message);
4300 else DEBUG(D_receive) debug_printf("gecos_pattern \"%s\" did not match "
4301 "gecos field \"%s\"\n", gecos_pattern, name);
4302 store_free((void *)re);
4304 originator_name = string_copy(name);
4307 /* A trusted caller has used -f but not -F */
4309 else originator_name = US"";
4312 /* Break the retry loop */
4317 if (++i > finduser_retries) break;
4321 /* If we cannot get a user login, log the incident and give up, unless the
4322 configuration specifies something to use. When running in the test harness,
4323 any setting of unknown_login overrides the actual name. */
4325 if (originator_login == NULL || running_in_test_harness)
4327 if (unknown_login != NULL)
4329 originator_login = expand_string(unknown_login);
4330 if (originator_name == NULL && unknown_username != NULL)
4331 originator_name = expand_string(unknown_username);
4332 if (originator_name == NULL) originator_name = US"";
4334 if (originator_login == NULL)
4335 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Failed to get user name for uid %d",
4339 /* Ensure that the user name is in a suitable form for use as a "phrase" in an
4342 originator_name = string_copy(parse_fix_phrase(originator_name,
4343 Ustrlen(originator_name), big_buffer, big_buffer_size));
4345 /* If a message is created by this call of Exim, the uid/gid of its originator
4346 are those of the caller. These values are overridden if an existing message is
4347 read in from the spool. */
4349 originator_uid = real_uid;
4350 originator_gid = real_gid;
4352 DEBUG(D_receive) debug_printf("originator: uid=%d gid=%d login=%s name=%s\n",
4353 (int)originator_uid, (int)originator_gid, originator_login, originator_name);
4355 /* Run in daemon and/or queue-running mode. The function daemon_go() never
4356 returns. We leave this till here so that the originator_ fields are available
4357 for incoming messages via the daemon. The daemon cannot be run in mua_wrapper
4360 if (daemon_listen || queue_interval > 0)
4364 fprintf(stderr, "Daemon cannot be run when mua_wrapper is set\n");
4365 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Daemon cannot be run when "
4366 "mua_wrapper is set");
4371 /* If the sender ident has not been set (by a trusted caller) set it to
4372 the caller. This will get overwritten below for an inetd call. If a trusted
4373 caller has set it empty, unset it. */
4375 if (sender_ident == NULL) sender_ident = originator_login;
4376 else if (sender_ident[0] == 0) sender_ident = NULL;
4378 /* Handle the -brw option, which is for checking out rewriting rules. Cause log
4379 writes (on errors) to go to stderr instead. Can't do this earlier, as want the
4380 originator_* variables set. */
4382 if (test_rewrite_arg >= 0)
4384 really_exim = FALSE;
4385 if (test_rewrite_arg >= argc)
4387 printf("-brw needs an address argument\n");
4388 exim_exit(EXIT_FAILURE);
4390 rewrite_test(argv[test_rewrite_arg]);
4391 exim_exit(EXIT_SUCCESS);
4394 /* A locally-supplied message is considered to be coming from a local user
4395 unless a trusted caller supplies a sender address with -f, or is passing in the
4396 message via SMTP (inetd invocation or otherwise). */
4398 if ((sender_address == NULL && !smtp_input) ||
4399 (!trusted_caller && filter_test == FTEST_NONE))
4401 sender_local = TRUE;
4403 /* A trusted caller can supply authenticated_sender and authenticated_id
4404 via -oMas and -oMai and if so, they will already be set. Otherwise, force
4405 defaults except when host checking. */
4407 if (authenticated_sender == NULL && !host_checking)
4408 authenticated_sender = string_sprintf("%s@%s", originator_login,
4409 qualify_domain_sender);
4410 if (authenticated_id == NULL && !host_checking)
4411 authenticated_id = originator_login;
4414 /* Trusted callers are always permitted to specify the sender address.
4415 Untrusted callers may specify it if it matches untrusted_set_sender, or if what
4416 is specified is the empty address. However, if a trusted caller does not
4417 specify a sender address for SMTP input, we leave sender_address unset. This
4418 causes the MAIL commands to be honoured. */
4420 if ((!smtp_input && sender_address == NULL) ||
4421 !receive_check_set_sender(sender_address))
4423 /* Either the caller is not permitted to set a general sender, or this is
4424 non-SMTP input and the trusted caller has not set a sender. If there is no
4425 sender, or if a sender other than <> is set, override with the originator's
4426 login (which will get qualified below), except when checking things. */
4428 if (sender_address == NULL /* No sender_address set */
4430 (sender_address[0] != 0 && /* Non-empty sender address, AND */
4431 !checking && /* Not running tests, AND */
4432 filter_test == FTEST_NONE)) /* Not testing a filter */
4434 sender_address = originator_login;
4435 sender_address_forced = FALSE;
4436 sender_address_domain = 0;
4440 /* Remember whether an untrusted caller set the sender address */
4442 sender_set_untrusted = sender_address != originator_login && !trusted_caller;
4444 /* Ensure that the sender address is fully qualified unless it is the empty
4445 address, which indicates an error message, or doesn't exist (root caller, smtp
4446 interface, no -f argument). */
4448 if (sender_address != NULL && sender_address[0] != 0 &&
4449 sender_address_domain == 0)
4450 sender_address = string_sprintf("%s@%s", local_part_quote(sender_address),
4451 qualify_domain_sender);
4453 DEBUG(D_receive) debug_printf("sender address = %s\n", sender_address);
4455 /* Handle a request to verify a list of addresses, or test them for delivery.
4456 This must follow the setting of the sender address, since routers can be
4457 predicated upon the sender. If no arguments are given, read addresses from
4458 stdin. Set debug_level to at least D_v to get full output for address testing.
4461 if (verify_address_mode || address_test_mode)
4464 int flags = vopt_qualify;
4466 if (verify_address_mode)
4468 if (!verify_as_sender) flags |= vopt_is_recipient;
4469 DEBUG(D_verify) debug_print_ids(US"Verifying:");
4474 flags |= vopt_is_recipient;
4475 debug_selector |= D_v;
4476 debug_file = stderr;
4477 debug_fd = fileno(debug_file);
4478 DEBUG(D_verify) debug_print_ids(US"Address testing:");
4481 if (recipients_arg < argc)
4483 while (recipients_arg < argc)
4485 uschar *s = argv[recipients_arg++];
4488 BOOL finished = FALSE;
4489 uschar *ss = parse_find_address_end(s, FALSE);
4490 if (*ss == ',') *ss = 0; else finished = TRUE;
4491 test_address(s, flags, &exit_value);
4494 while (*(++s) != 0 && (*s == ',' || isspace(*s)));
4501 uschar *s = get_stdinput(NULL, NULL);
4502 if (s == NULL) break;
4503 test_address(s, flags, &exit_value);
4507 exim_exit(exit_value);
4510 /* Handle expansion checking. Either expand items on the command line, or read
4511 from stdin if there aren't any. If -Mset was specified, load the message so
4512 that its variables can be used, but restrict this facility to admin users.
4513 Otherwise, if -bem was used, read a message from stdin. */
4517 if (msg_action_arg > 0 && msg_action == MSG_LOAD)
4519 uschar spoolname[256]; /* Not big_buffer; used in spool_read_header() */
4522 fprintf(stderr, "exim: permission denied\n");
4525 message_id = argv[msg_action_arg];
4526 (void)string_format(spoolname, sizeof(spoolname), "%s-H", message_id);
4527 if (!spool_open_datafile(message_id))
4528 printf ("Failed to load message datafile %s\n", message_id);
4529 if (spool_read_header(spoolname, TRUE, FALSE) != spool_read_OK)
4530 printf ("Failed to load message %s\n", message_id);
4533 /* Read a test message from a file. We fudge it up to be on stdin, saving
4534 stdin itself for later reading of expansion strings. */
4536 else if (expansion_test_message != NULL)
4538 int save_stdin = dup(0);
4539 int fd = Uopen(expansion_test_message, O_RDONLY, 0);
4542 fprintf(stderr, "exim: failed to open %s: %s\n", expansion_test_message,
4544 return EXIT_FAILURE;
4547 filter_test = FTEST_USER; /* Fudge to make it look like filter test */
4548 message_ended = END_NOTENDED;
4549 read_message_body(receive_msg(extract_recipients));
4550 message_linecount += body_linecount;
4551 (void)dup2(save_stdin, 0);
4552 (void)close(save_stdin);
4553 clearerr(stdin); /* Required by Darwin */
4556 /* Allow $recipients for this testing */
4558 enable_dollar_recipients = TRUE;
4560 /* Expand command line items */
4562 if (recipients_arg < argc)
4564 while (recipients_arg < argc)
4566 uschar *s = argv[recipients_arg++];
4567 uschar *ss = expand_string(s);
4568 if (ss == NULL) printf ("Failed: %s\n", expand_string_message);
4569 else printf("%s\n", CS ss);
4577 char *(*fn_readline)(const char *) = NULL;
4578 void (*fn_addhist)(const char *) = NULL;
4581 void *dlhandle = set_readline(&fn_readline, &fn_addhist);
4587 uschar *source = get_stdinput(fn_readline, fn_addhist);
4588 if (source == NULL) break;
4589 ss = expand_string(source);
4591 printf ("Failed: %s\n", expand_string_message);
4592 else printf("%s\n", CS ss);
4596 if (dlhandle != NULL) dlclose(dlhandle);
4600 /* The data file will be open after -Mset */
4602 if (deliver_datafile >= 0)
4604 (void)close(deliver_datafile);
4605 deliver_datafile = -1;
4608 exim_exit(EXIT_SUCCESS);
4612 /* The active host name is normally the primary host name, but it can be varied
4613 for hosts that want to play several parts at once. We need to ensure that it is
4614 set for host checking, and for receiving messages. */
4616 smtp_active_hostname = primary_hostname;
4617 if (raw_active_hostname != NULL)
4619 uschar *nah = expand_string(raw_active_hostname);
4622 if (!expand_string_forcedfail)
4623 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to expand \"%s\" "
4624 "(smtp_active_hostname): %s", raw_active_hostname,
4625 expand_string_message);
4627 else if (nah[0] != 0) smtp_active_hostname = nah;
4630 /* Handle host checking: this facility mocks up an incoming SMTP call from a
4631 given IP address so that the blocking and relay configuration can be tested.
4632 Unless a sender_ident was set by -oMt, we discard it (the default is the
4633 caller's login name). An RFC 1413 call is made only if we are running in the
4634 test harness and an incoming interface and both ports are specified, because
4635 there is no TCP/IP call to find the ident for. */
4642 if (!sender_ident_set)
4644 sender_ident = NULL;
4645 if (running_in_test_harness && sender_host_port != 0 &&
4646 interface_address != NULL && interface_port != 0)
4647 verify_get_ident(1413);
4650 /* In case the given address is a non-canonical IPv6 address, canonicize
4651 it. The code works for both IPv4 and IPv6, as it happens. */
4653 size = host_aton(sender_host_address, x);
4654 sender_host_address = store_get(48); /* large enough for full IPv6 */
4655 (void)host_nmtoa(size, x, -1, sender_host_address, ':');
4657 /* Now set up for testing */
4659 host_build_sender_fullhost();
4663 sender_local = FALSE;
4664 sender_host_notsocket = TRUE;
4665 debug_file = stderr;
4666 debug_fd = fileno(debug_file);
4667 fprintf(stdout, "\n**** SMTP testing session as if from host %s\n"
4668 "**** but without any ident (RFC 1413) callback.\n"
4669 "**** This is not for real!\n\n",
4670 sender_host_address);
4672 if (verify_check_host(&hosts_connection_nolog) == OK)
4673 log_write_selector &= ~L_smtp_connection;
4674 log_write(L_smtp_connection, LOG_MAIN, "%s", smtp_get_connection_info());
4676 /* NOTE: We do *not* call smtp_log_no_mail() if smtp_start_session() fails,
4677 because a log line has already been written for all its failure exists
4678 (usually "connection refused: <reason>") and writing another one is
4679 unnecessary clutter. */
4681 if (smtp_start_session())
4683 reset_point = store_get(0);
4686 store_reset(reset_point);
4687 if (smtp_setup_msg() <= 0) break;
4688 if (!receive_msg(FALSE)) break;
4692 exim_exit(EXIT_SUCCESS);
4696 /* Arrange for message reception if recipients or SMTP were specified;
4697 otherwise complain unless a version print (-bV) happened or this is a filter
4698 verification test. In the former case, show the configuration file name. */
4700 if (recipients_arg >= argc && !extract_recipients && !smtp_input)
4702 if (version_printed)
4704 printf("Configuration file is %s\n", config_main_filename);
4705 return EXIT_SUCCESS;
4708 if (filter_test == FTEST_NONE)
4709 exim_usage(called_as);
4713 /* If mua_wrapper is set, Exim is being used to turn an MUA that submits on the
4714 standard input into an MUA that submits to a smarthost over TCP/IP. We know
4715 that we are not called from inetd, because that is rejected above. The
4716 following configuration settings are forced here:
4718 (1) Synchronous delivery (-odi)
4719 (2) Errors to stderr (-oep == -oeq)
4720 (3) No parallel remote delivery
4721 (4) Unprivileged delivery
4723 We don't force overall queueing options because there are several of them;
4724 instead, queueing is avoided below when mua_wrapper is set. However, we do need
4725 to override any SMTP queueing. */
4729 synchronous_delivery = TRUE;
4730 arg_error_handling = ERRORS_STDERR;
4731 remote_max_parallel = 1;
4732 deliver_drop_privilege = TRUE;
4734 queue_smtp_domains = NULL;
4738 /* Prepare to accept one or more new messages on the standard input. When a
4739 message has been read, its id is returned in message_id[]. If doing immediate
4740 delivery, we fork a delivery process for each received message, except for the
4741 last one, where we can save a process switch.
4743 It is only in non-smtp mode that error_handling is allowed to be changed from
4744 its default of ERRORS_SENDER by argument. (Idle thought: are any of the
4745 sendmail error modes other than -oem ever actually used? Later: yes.) */
4747 if (!smtp_input) error_handling = arg_error_handling;
4749 /* If this is an inetd call, ensure that stderr is closed to prevent panic
4750 logging being sent down the socket and make an identd call to get the
4755 (void)fclose(stderr);
4756 exim_nullstd(); /* Re-open to /dev/null */
4757 verify_get_ident(IDENT_PORT);
4758 host_build_sender_fullhost();
4759 set_process_info("handling incoming connection from %s via inetd",
4763 /* If the sender host address has been set, build sender_fullhost if it hasn't
4764 already been done (which it will have been for inetd). This caters for the
4765 case when it is forced by -oMa. However, we must flag that it isn't a socket,
4766 so that the test for IP options is skipped for -bs input. */
4768 if (sender_host_address != NULL && sender_fullhost == NULL)
4770 host_build_sender_fullhost();
4771 set_process_info("handling incoming connection from %s via -oMa",
4773 sender_host_notsocket = TRUE;
4776 /* Otherwise, set the sender host as unknown except for inetd calls. This
4777 prevents host checking in the case of -bs not from inetd and also for -bS. */
4779 else if (!is_inetd) sender_host_unknown = TRUE;
4781 /* If stdout does not exist, then dup stdin to stdout. This can happen
4782 if exim is started from inetd. In this case fd 0 will be set to the socket,
4783 but fd 1 will not be set. This also happens for passed SMTP channels. */
4785 if (fstat(1, &statbuf) < 0) (void)dup2(0, 1);
4787 /* Set up the incoming protocol name and the state of the program. Root is
4788 allowed to force received protocol via the -oMr option above. If we have come
4789 via inetd, the process info has already been set up. We don't set
4790 received_protocol here for smtp input, as it varies according to
4791 batch/HELO/EHLO/AUTH/TLS. */
4795 if (!is_inetd) set_process_info("accepting a local %sSMTP message from <%s>",
4796 smtp_batched_input? "batched " : "",
4797 (sender_address!= NULL)? sender_address : originator_login);
4801 if (received_protocol == NULL)
4802 received_protocol = string_sprintf("local%s", called_as);
4803 set_process_info("accepting a local non-SMTP message from <%s>",
4807 /* Initialize the session_local_queue-only flag (this will be ignored if
4808 mua_wrapper is set) */
4811 session_local_queue_only = queue_only;
4813 /* For non-SMTP and for batched SMTP input, check that there is enough space on
4814 the spool if so configured. On failure, we must not attempt to send an error
4815 message! (For interactive SMTP, the check happens at MAIL FROM and an SMTP
4816 error code is given.) */
4818 if ((!smtp_input || smtp_batched_input) && !receive_check_fs(0))
4820 fprintf(stderr, "exim: insufficient disk space\n");
4821 return EXIT_FAILURE;
4824 /* If this is smtp input of any kind, real or batched, handle the start of the
4827 NOTE: We do *not* call smtp_log_no_mail() if smtp_start_session() fails,
4828 because a log line has already been written for all its failure exists
4829 (usually "connection refused: <reason>") and writing another one is
4830 unnecessary clutter. */
4836 if (verify_check_host(&hosts_connection_nolog) == OK)
4837 log_write_selector &= ~L_smtp_connection;
4838 log_write(L_smtp_connection, LOG_MAIN, "%s", smtp_get_connection_info());
4839 if (!smtp_start_session())
4842 exim_exit(EXIT_SUCCESS);
4846 /* Otherwise, set up the input size limit here. */
4850 thismessage_size_limit = expand_string_integer(message_size_limit, TRUE);
4851 if (expand_string_message != NULL)
4853 if (thismessage_size_limit == -1)
4854 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to expand "
4855 "message_size_limit: %s", expand_string_message);
4857 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "invalid value for "
4858 "message_size_limit: %s", expand_string_message);
4862 /* Loop for several messages when reading SMTP input. If we fork any child
4863 processes, we don't want to wait for them unless synchronous delivery is
4864 requested, so set SIGCHLD to SIG_IGN in that case. This is not necessarily the
4865 same as SIG_DFL, despite the fact that documentation often lists the default as
4866 "ignore". This is a confusing area. This is what I know:
4868 At least on some systems (e.g. Solaris), just setting SIG_IGN causes child
4869 processes that complete simply to go away without ever becoming defunct. You
4870 can't then wait for them - but we don't want to wait for them in the
4871 non-synchronous delivery case. However, this behaviour of SIG_IGN doesn't
4872 happen for all OS (e.g. *BSD is different).
4874 But that's not the end of the story. Some (many? all?) systems have the
4875 SA_NOCLDWAIT option for sigaction(). This requests the behaviour that Solaris
4876 has by default, so it seems that the difference is merely one of default
4877 (compare restarting vs non-restarting signals).
4879 To cover all cases, Exim sets SIG_IGN with SA_NOCLDWAIT here if it can. If not,
4880 it just sets SIG_IGN. To be on the safe side it also calls waitpid() at the end
4881 of the loop below. Paranoia rules.
4883 February 2003: That's *still* not the end of the story. There are now versions
4884 of Linux (where SIG_IGN does work) that are picky. If, having set SIG_IGN, a
4885 process then calls waitpid(), a grumble is written to the system log, because
4886 this is logically inconsistent. In other words, it doesn't like the paranoia.
4887 As a consequenc of this, the waitpid() below is now excluded if we are sure
4888 that SIG_IGN works. */
4890 if (!synchronous_delivery)
4893 struct sigaction act;
4894 act.sa_handler = SIG_IGN;
4895 sigemptyset(&(act.sa_mask));
4896 act.sa_flags = SA_NOCLDWAIT;
4897 sigaction(SIGCHLD, &act, NULL);
4899 signal(SIGCHLD, SIG_IGN);
4903 /* Save the current store pool point, for resetting at the start of
4904 each message, and save the real sender address, if any. */
4906 reset_point = store_get(0);
4907 real_sender_address = sender_address;
4909 /* Loop to receive messages; receive_msg() returns TRUE if there are more
4910 messages to be read (SMTP input), or FALSE otherwise (not SMTP, or SMTP channel
4915 store_reset(reset_point);
4918 /* Handle the SMTP case; call smtp_setup_mst() to deal with the initial SMTP
4919 input and build the recipients list, before calling receive_msg() to read the
4920 message proper. Whatever sender address is given in the SMTP transaction is
4921 often ignored for local senders - we use the actual sender, which is normally
4922 either the underlying user running this process or a -f argument provided by
4923 a trusted caller. It is saved in real_sender_address. The test for whether to
4924 accept the SMTP sender is encapsulated in receive_check_set_sender(). */
4929 if ((rc = smtp_setup_msg()) > 0)
4931 if (real_sender_address != NULL &&
4932 !receive_check_set_sender(sender_address))
4934 sender_address = raw_sender = real_sender_address;
4935 sender_address_unrewritten = NULL;
4938 /* For batched SMTP, we have to run the acl_not_smtp_start ACL, since it
4939 isn't really SMTP, so no other ACL will run until the acl_not_smtp one at
4940 the very end. The result of the ACL is ignored (as for other non-SMTP
4941 messages). It is run for its potential side effects. */
4943 if (smtp_batched_input && acl_not_smtp_start != NULL)
4945 uschar *user_msg, *log_msg;
4946 enable_dollar_recipients = TRUE;
4947 (void)acl_check(ACL_WHERE_NOTSMTP_START, NULL, acl_not_smtp_start,
4948 &user_msg, &log_msg);
4949 enable_dollar_recipients = FALSE;
4952 /* Now get the data for the message */
4954 more = receive_msg(extract_recipients);
4955 if (message_id[0] == 0)
4958 smtp_log_no_mail(); /* Log no mail if configured */
4959 exim_exit(EXIT_FAILURE);
4964 smtp_log_no_mail(); /* Log no mail if configured */
4965 exim_exit((rc == 0)? EXIT_SUCCESS : EXIT_FAILURE);
4969 /* In the non-SMTP case, we have all the information from the command
4970 line, but must process it in case it is in the more general RFC822
4971 format, and in any case, to detect syntax errors. Also, it appears that
4972 the use of comma-separated lists as single arguments is common, so we
4973 had better support them. */
4979 int count = argc - recipients_arg;
4980 uschar **list = argv + recipients_arg;
4982 /* These options cannot be changed dynamically for non-SMTP messages */
4984 active_local_sender_retain = local_sender_retain;
4985 active_local_from_check = local_from_check;
4987 /* Save before any rewriting */
4989 raw_sender = string_copy(sender_address);
4991 /* Loop for each argument */
4993 for (i = 0; i < count; i++)
4995 int start, end, domain;
4997 uschar *s = list[i];
4999 /* Loop for each comma-separated address */
5003 BOOL finished = FALSE;
5005 uschar *ss = parse_find_address_end(s, FALSE);
5007 if (*ss == ',') *ss = 0; else finished = TRUE;
5009 /* Check max recipients - if -t was used, these aren't recipients */
5011 if (recipients_max > 0 && ++rcount > recipients_max &&
5012 !extract_recipients)
5014 if (error_handling == ERRORS_STDERR)
5016 fprintf(stderr, "exim: too many recipients\n");
5017 exim_exit(EXIT_FAILURE);
5022 moan_to_sender(ERRMESS_TOOMANYRECIP, NULL, NULL, stdin, TRUE)?
5023 errors_sender_rc : EXIT_FAILURE;
5028 parse_extract_address(s, &errmess, &start, &end, &domain, FALSE);
5030 if (domain == 0 && !allow_unqualified_recipient)
5033 errmess = US"unqualified recipient address not allowed";
5036 if (recipient == NULL)
5038 if (error_handling == ERRORS_STDERR)
5040 fprintf(stderr, "exim: bad recipient address \"%s\": %s\n",
5041 string_printing(list[i]), errmess);
5042 exim_exit(EXIT_FAILURE);
5048 eblock.text1 = string_printing(list[i]);
5049 eblock.text2 = errmess;
5051 moan_to_sender(ERRMESS_BADARGADDRESS, &eblock, NULL, stdin, TRUE)?
5052 errors_sender_rc : EXIT_FAILURE;
5056 receive_add_recipient(recipient, -1);
5059 while (*(++s) != 0 && (*s == ',' || isspace(*s)));
5063 /* Show the recipients when debugging */
5068 if (sender_address != NULL) debug_printf("Sender: %s\n", sender_address);
5069 if (recipients_list != NULL)
5071 debug_printf("Recipients:\n");
5072 for (i = 0; i < recipients_count; i++)
5073 debug_printf(" %s\n", recipients_list[i].address);
5077 /* Run the acl_not_smtp_start ACL if required. The result of the ACL is
5078 ignored; rejecting here would just add complication, and it can just as
5079 well be done later. Allow $recipients to be visible in the ACL. */
5081 if (acl_not_smtp_start != NULL)
5083 uschar *user_msg, *log_msg;
5084 enable_dollar_recipients = TRUE;
5085 (void)acl_check(ACL_WHERE_NOTSMTP_START, NULL, acl_not_smtp_start,
5086 &user_msg, &log_msg);
5087 enable_dollar_recipients = FALSE;
5090 /* Read the data for the message. If filter_test is not FTEST_NONE, this
5091 will just read the headers for the message, and not write anything onto the
5094 message_ended = END_NOTENDED;
5095 more = receive_msg(extract_recipients);
5097 /* more is always FALSE here (not SMTP message) when reading a message
5098 for real; when reading the headers of a message for filter testing,
5099 it is TRUE if the headers were terminated by '.' and FALSE otherwise. */
5101 if (message_id[0] == 0) exim_exit(EXIT_FAILURE);
5102 } /* Non-SMTP message reception */
5104 /* If this is a filter testing run, there are headers in store, but
5105 no message on the spool. Run the filtering code in testing mode, setting
5106 the domain to the qualify domain and the local part to the current user,
5107 unless they have been set by options. The prefix and suffix are left unset
5108 unless specified. The the return path is set to to the sender unless it has
5109 already been set from a return-path header in the message. */
5111 if (filter_test != FTEST_NONE)
5113 deliver_domain = (ftest_domain != NULL)?
5114 ftest_domain : qualify_domain_recipient;
5115 deliver_domain_orig = deliver_domain;
5116 deliver_localpart = (ftest_localpart != NULL)?
5117 ftest_localpart : originator_login;
5118 deliver_localpart_orig = deliver_localpart;
5119 deliver_localpart_prefix = ftest_prefix;
5120 deliver_localpart_suffix = ftest_suffix;
5121 deliver_home = originator_home;
5123 if (return_path == NULL)
5125 printf("Return-path copied from sender\n");
5126 return_path = string_copy(sender_address);
5130 printf("Return-path = %s\n", (return_path[0] == 0)? US"<>" : return_path);
5132 printf("Sender = %s\n", (sender_address[0] == 0)? US"<>" : sender_address);
5134 receive_add_recipient(
5135 string_sprintf("%s%s%s@%s",
5136 (ftest_prefix == NULL)? US"" : ftest_prefix,
5138 (ftest_suffix == NULL)? US"" : ftest_suffix,
5139 deliver_domain), -1);
5141 printf("Recipient = %s\n", recipients_list[0].address);
5142 if (ftest_prefix != NULL) printf("Prefix = %s\n", ftest_prefix);
5143 if (ftest_suffix != NULL) printf("Suffix = %s\n", ftest_suffix);
5145 (void)chdir("/"); /* Get away from wherever the user is running this from */
5147 /* Now we run either a system filter test, or a user filter test, or both.
5148 In the latter case, headers added by the system filter will persist and be
5149 available to the user filter. We need to copy the filter variables
5152 if ((filter_test & FTEST_SYSTEM) != 0)
5154 if (!filter_runtest(filter_sfd, filter_test_sfile, TRUE, more))
5155 exim_exit(EXIT_FAILURE);
5158 memcpy(filter_sn, filter_n, sizeof(filter_sn));
5160 if ((filter_test & FTEST_USER) != 0)
5162 if (!filter_runtest(filter_ufd, filter_test_ufile, FALSE, more))
5163 exim_exit(EXIT_FAILURE);
5166 exim_exit(EXIT_SUCCESS);
5169 /* Else act on the result of message reception. We should not get here unless
5170 message_id[0] is non-zero. If queue_only is set, session_local_queue_only
5171 will be TRUE. If it is not, check on the number of messages received in this
5174 if (!session_local_queue_only &&
5175 smtp_accept_queue_per_connection > 0 &&
5176 receive_messagecount > smtp_accept_queue_per_connection)
5178 session_local_queue_only = TRUE;
5179 queue_only_reason = 2;
5182 /* Initialize local_queue_only from session_local_queue_only. If it is false,
5183 and queue_only_load is set, check that the load average is below it. If it is
5184 not, set local_queue_only TRUE. If queue_only_load_latch is true (the
5185 default), we put the whole session into queue_only mode. It then remains this
5186 way for any subsequent messages on the same SMTP connection. This is a
5187 deliberate choice; even though the load average may fall, it doesn't seem
5188 right to deliver later messages on the same call when not delivering earlier
5189 ones. However, there are odd cases where this is not wanted, so this can be
5190 changed by setting queue_only_load_latch false. */
5192 local_queue_only = session_local_queue_only;
5193 if (!local_queue_only && queue_only_load >= 0)
5195 local_queue_only = (load_average = OS_GETLOADAVG()) > queue_only_load;
5196 if (local_queue_only)
5198 queue_only_reason = 3;
5199 if (queue_only_load_latch) session_local_queue_only = TRUE;
5203 /* If running as an MUA wrapper, all queueing options and freezing options
5207 local_queue_only = queue_only_policy = deliver_freeze = FALSE;
5209 /* Log the queueing here, when it will get a message id attached, but
5210 not if queue_only is set (case 0). Case 1 doesn't happen here (too many
5213 if (local_queue_only) switch(queue_only_reason)
5216 log_write(L_delay_delivery,
5217 LOG_MAIN, "no immediate delivery: more than %d messages "
5218 "received in one connection", smtp_accept_queue_per_connection);
5222 log_write(L_delay_delivery,
5223 LOG_MAIN, "no immediate delivery: load average %.2f",
5224 (double)load_average/1000.0);
5228 /* Else do the delivery unless the ACL or local_scan() called for queue only
5229 or froze the message. Always deliver in a separate process. A fork failure is
5230 not a disaster, as the delivery will eventually happen on a subsequent queue
5231 run. The search cache must be tidied before the fork, as the parent will
5232 do it before exiting. The child will trigger a lookup failure and
5233 thereby defer the delivery if it tries to use (for example) a cached ldap
5234 connection that the parent has called unbind on. */
5236 else if (!queue_only_policy && !deliver_freeze)
5241 if ((pid = fork()) == 0)
5244 close_unwanted(); /* Close unwanted file descriptors and TLS */
5245 exim_nullstd(); /* Ensure std{in,out,err} exist */
5247 /* Re-exec Exim if we need to regain privilege (note: in mua_wrapper
5248 mode, deliver_drop_privilege is forced TRUE). */
5250 if (geteuid() != root_uid && !deliver_drop_privilege && !unprivileged)
5252 (void)child_exec_exim(CEE_EXEC_EXIT, FALSE, NULL, FALSE, 2, US"-Mc",
5254 /* Control does not return here. */
5257 /* No need to re-exec */
5259 rc = deliver_message(message_id, FALSE, FALSE);
5261 _exit((!mua_wrapper || rc == DELIVER_MUA_SUCCEEDED)?
5262 EXIT_SUCCESS : EXIT_FAILURE);
5267 log_write(0, LOG_MAIN|LOG_PANIC, "failed to fork automatic delivery "
5268 "process: %s", strerror(errno));
5271 /* In the parent, wait if synchronous delivery is required. This will
5272 always be the case in MUA wrapper mode. */
5274 else if (synchronous_delivery)
5277 while (wait(&status) != pid);
5278 if ((status & 0x00ff) != 0)
5279 log_write(0, LOG_MAIN|LOG_PANIC,
5280 "process %d crashed with signal %d while delivering %s",
5281 (int)pid, status & 0x00ff, message_id);
5282 if (mua_wrapper && (status & 0xffff) != 0) exim_exit(EXIT_FAILURE);
5286 /* The loop will repeat if more is TRUE. If we do not know know that the OS
5287 automatically reaps children (see comments above the loop), clear away any
5288 finished subprocesses here, in case there are lots of messages coming in
5289 from the same source. */
5291 #ifndef SIG_IGN_WORKS
5292 while (waitpid(-1, NULL, WNOHANG) > 0);
5296 exim_exit(EXIT_SUCCESS); /* Never returns */
5297 return 0; /* To stop compiler warning */