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 /* Everything else is details which are only worth reporting when debugging.
916 Perhaps the tls_version_report should move into this too. */
921 /* clang defines __GNUC__ (at least, for me) so test for it first */
922 #if defined(__clang__)
923 fprintf(f, "Compiler: CLang [%s]\n", __clang_version__);
924 #elif defined(__GNUC__)
925 fprintf(f, "Compiler: GCC [%s]\n",
929 "? unknown version ?"
933 fprintf(f, "Compiler: <unknown>\n");
937 tls_version_report(f);
940 #ifdef AUTH_CYRUS_SASL
941 auth_cyrus_sasl_version_report(f);
944 fprintf(f, "Library version: PCRE: Compile: %d.%d%s\n"
946 PCRE_MAJOR, PCRE_MINOR,
947 /* PRE_PRERELEASE is either defined and empty or a string.
948 * unless its an ancient version of PCRE in which case it
950 #ifdef PCRE_PRERELEASE
958 for (i = 0; i < lookup_list_count; i++)
960 if (lookup_list[i]->version_report)
961 lookup_list[i]->version_report(f);
964 #ifdef WHITELIST_D_MACROS
965 fprintf(f, "WHITELIST_D_MACROS: \"%s\"\n", WHITELIST_D_MACROS);
967 fprintf(f, "WHITELIST_D_MACROS unset\n");
969 #ifdef TRUSTED_CONFIG_LIST
970 fprintf(f, "TRUSTED_CONFIG_LIST: \"%s\"\n", TRUSTED_CONFIG_LIST);
972 fprintf(f, "TRUSTED_CONFIG_LIST unset\n");
981 /*************************************************
982 * Quote a local part *
983 *************************************************/
985 /* This function is used when a sender address or a From: or Sender: header
986 line is being created from the caller's login, or from an authenticated_id. It
987 applies appropriate quoting rules for a local part.
989 Argument: the local part
990 Returns: the local part, quoted if necessary
994 local_part_quote(uschar *lpart)
996 BOOL needs_quote = FALSE;
1001 for (t = lpart; !needs_quote && *t != 0; t++)
1003 needs_quote = !isalnum(*t) && strchr("!#$%&'*+-/=?^_`{|}~", *t) == NULL &&
1004 (*t != '.' || t == lpart || t[1] == 0);
1007 if (!needs_quote) return lpart;
1010 yield = string_cat(NULL, &size, &ptr, US"\"", 1);
1014 uschar *nq = US Ustrpbrk(lpart, "\\\"");
1017 yield = string_cat(yield, &size, &ptr, lpart, Ustrlen(lpart));
1020 yield = string_cat(yield, &size, &ptr, lpart, nq - lpart);
1021 yield = string_cat(yield, &size, &ptr, US"\\", 1);
1022 yield = string_cat(yield, &size, &ptr, nq, 1);
1026 yield = string_cat(yield, &size, &ptr, US"\"", 1);
1034 /*************************************************
1035 * Load readline() functions *
1036 *************************************************/
1038 /* This function is called from testing executions that read data from stdin,
1039 but only when running as the calling user. Currently, only -be does this. The
1040 function loads the readline() function library and passes back the functions.
1041 On some systems, it needs the curses library, so load that too, but try without
1042 it if loading fails. All this functionality has to be requested at build time.
1045 fn_readline_ptr pointer to where to put the readline pointer
1046 fn_addhist_ptr pointer to where to put the addhistory function
1048 Returns: the dlopen handle or NULL on failure
1052 set_readline(char * (**fn_readline_ptr)(const char *),
1053 void (**fn_addhist_ptr)(const char *))
1056 void *dlhandle_curses = dlopen("libcurses.so", RTLD_GLOBAL|RTLD_LAZY);
1058 dlhandle = dlopen("libreadline.so", RTLD_GLOBAL|RTLD_NOW);
1059 if (dlhandle_curses != NULL) dlclose(dlhandle_curses);
1061 if (dlhandle != NULL)
1063 /* Checked manual pages; at least in GNU Readline 6.1, the prototypes are:
1064 * char * readline (const char *prompt);
1065 * void add_history (const char *string);
1067 *fn_readline_ptr = (char *(*)(const char*))dlsym(dlhandle, "readline");
1068 *fn_addhist_ptr = (void(*)(const char*))dlsym(dlhandle, "add_history");
1072 DEBUG(D_any) debug_printf("failed to load readline: %s\n", dlerror());
1081 /*************************************************
1082 * Get a line from stdin for testing things *
1083 *************************************************/
1085 /* This function is called when running tests that can take a number of lines
1086 of input (for example, -be and -bt). It handles continuations and trailing
1087 spaces. And prompting and a blank line output on eof. If readline() is in use,
1088 the arguments are non-NULL and provide the relevant functions.
1091 fn_readline readline function or NULL
1092 fn_addhist addhist function or NULL
1094 Returns: pointer to dynamic memory, or NULL at end of file
1098 get_stdinput(char *(*fn_readline)(const char *), void(*fn_addhist)(const char *))
1103 uschar *yield = NULL;
1105 if (fn_readline == NULL) { printf("> "); fflush(stdout); }
1109 uschar buffer[1024];
1113 char *readline_line = NULL;
1114 if (fn_readline != NULL)
1116 if ((readline_line = fn_readline((i > 0)? "":"> ")) == NULL) break;
1117 if (*readline_line != 0 && fn_addhist != NULL) fn_addhist(readline_line);
1118 p = US readline_line;
1123 /* readline() not in use */
1126 if (Ufgets(buffer, sizeof(buffer), stdin) == NULL) break;
1130 /* Handle the line */
1132 ss = p + (int)Ustrlen(p);
1133 while (ss > p && isspace(ss[-1])) ss--;
1137 while (p < ss && isspace(*p)) p++; /* leading space after cont */
1140 yield = string_cat(yield, &size, &ptr, p, ss - p);
1143 if (fn_readline != NULL) free(readline_line);
1146 if (ss == p || yield[ptr-1] != '\\')
1154 if (yield == NULL) printf("\n");
1160 /*************************************************
1161 * Output usage information for the program *
1162 *************************************************/
1164 /* This function is called when there are no recipients
1165 or a specific --help argument was added.
1168 progname information on what name we were called by
1170 Returns: DOES NOT RETURN
1174 exim_usage(uschar *progname)
1177 /* Handle specific program invocation varients */
1178 if (Ustrcmp(progname, US"-mailq") == 0)
1181 "mailq - list the contents of the mail queue\n\n"
1182 "For a list of options, see the Exim documentation.\n");
1186 /* Generic usage - we output this whatever happens */
1188 "Exim is a Mail Transfer Agent. It is normally called by Mail User Agents,\n"
1189 "not directly from a shell command line. Options and/or arguments control\n"
1190 "what it does when called. For a list of options, see the Exim documentation.\n");
1197 /*************************************************
1198 * Validate that the macros given are okay *
1199 *************************************************/
1201 /* Typically, Exim will drop privileges if macros are supplied. In some
1202 cases, we want to not do so.
1204 Arguments: none (macros is a global)
1205 Returns: true if trusted, false otherwise
1209 macros_trusted(void)
1211 #ifdef WHITELIST_D_MACROS
1213 uschar *whitelisted, *end, *p, **whites, **w;
1214 int white_count, i, n;
1216 BOOL prev_char_item, found;
1221 #ifndef WHITELIST_D_MACROS
1225 /* We only trust -D overrides for some invoking users:
1226 root, the exim run-time user, the optional config owner user.
1227 I don't know why config-owner would be needed, but since they can own the
1228 config files anyway, there's no security risk to letting them override -D. */
1229 if ( ! ((real_uid == root_uid)
1230 || (real_uid == exim_uid)
1231 #ifdef CONFIGURE_OWNER
1232 || (real_uid == config_uid)
1236 debug_printf("macros_trusted rejecting macros for uid %d\n", (int) real_uid);
1240 /* Get a list of macros which are whitelisted */
1241 whitelisted = string_copy_malloc(US WHITELIST_D_MACROS);
1242 prev_char_item = FALSE;
1244 for (p = whitelisted; *p != '\0'; ++p)
1246 if (*p == ':' || isspace(*p))
1251 prev_char_item = FALSE;
1254 if (!prev_char_item)
1255 prev_char_item = TRUE;
1262 whites = store_malloc(sizeof(uschar *) * (white_count+1));
1263 for (p = whitelisted, i = 0; (p != end) && (i < white_count); ++p)
1268 if (i == white_count)
1270 while (*p != '\0' && p < end)
1276 /* The list of macros should be very short. Accept the N*M complexity. */
1277 for (m = macros; m != NULL; m = m->next)
1280 for (w = whites; *w; ++w)
1281 if (Ustrcmp(*w, m->name) == 0)
1288 if (m->replacement == NULL)
1290 len = Ustrlen(m->replacement);
1293 n = pcre_exec(regex_whitelisted_macro, NULL, CS m->replacement, len,
1294 0, PCRE_EOPT, NULL, 0);
1297 if (n != PCRE_ERROR_NOMATCH)
1298 debug_printf("macros_trusted checking %s returned %d\n", m->name, n);
1302 DEBUG(D_any) debug_printf("macros_trusted overriden to true by whitelisting\n");
1308 /*************************************************
1309 * Entry point and high-level code *
1310 *************************************************/
1312 /* Entry point for the Exim mailer. Analyse the arguments and arrange to take
1313 the appropriate action. All the necessary functions are present in the one
1314 binary. I originally thought one should split it up, but it turns out that so
1315 much of the apparatus is needed in each chunk that one might as well just have
1316 it all available all the time, which then makes the coding easier as well.
1319 argc count of entries in argv
1320 argv argument strings, with argv[0] being the program name
1322 Returns: EXIT_SUCCESS if terminated successfully
1323 EXIT_FAILURE otherwise, except when a message has been sent
1324 to the sender, and -oee was given
1328 main(int argc, char **cargv)
1330 uschar **argv = USS cargv;
1331 int arg_receive_timeout = -1;
1332 int arg_smtp_receive_timeout = -1;
1333 int arg_error_handling = error_handling;
1334 int filter_sfd = -1;
1335 int filter_ufd = -1;
1338 int list_queue_option = 0;
1340 int msg_action_arg = -1;
1341 int namelen = (argv[0] == NULL)? 0 : Ustrlen(argv[0]);
1342 int queue_only_reason = 0;
1344 int perl_start_option = 0;
1346 int recipients_arg = argc;
1347 int sender_address_domain = 0;
1348 int test_retry_arg = -1;
1349 int test_rewrite_arg = -1;
1350 BOOL arg_queue_only = FALSE;
1351 BOOL bi_option = FALSE;
1352 BOOL checking = FALSE;
1353 BOOL count_queue = FALSE;
1354 BOOL expansion_test = FALSE;
1355 BOOL extract_recipients = FALSE;
1356 BOOL forced_delivery = FALSE;
1357 BOOL f_end_dot = FALSE;
1358 BOOL deliver_give_up = FALSE;
1359 BOOL list_queue = FALSE;
1360 BOOL list_options = FALSE;
1361 BOOL local_queue_only;
1363 BOOL one_msg_action = FALSE;
1364 BOOL queue_only_set = FALSE;
1365 BOOL receiving_message = TRUE;
1366 BOOL sender_ident_set = FALSE;
1367 BOOL session_local_queue_only;
1369 BOOL removed_privilege = FALSE;
1370 BOOL usage_wanted = FALSE;
1371 BOOL verify_address_mode = FALSE;
1372 BOOL verify_as_sender = FALSE;
1373 BOOL version_printed = FALSE;
1374 uschar *alias_arg = NULL;
1375 uschar *called_as = US"";
1376 uschar *start_queue_run_id = NULL;
1377 uschar *stop_queue_run_id = NULL;
1378 uschar *expansion_test_message = NULL;
1379 uschar *ftest_domain = NULL;
1380 uschar *ftest_localpart = NULL;
1381 uschar *ftest_prefix = NULL;
1382 uschar *ftest_suffix = NULL;
1383 uschar *malware_test_file = NULL;
1384 uschar *real_sender_address;
1385 uschar *originator_home = US"/";
1389 struct stat statbuf;
1390 pid_t passed_qr_pid = (pid_t)0;
1391 int passed_qr_pipe = -1;
1392 gid_t group_list[NGROUPS_MAX];
1394 /* Possible options for -R and -S */
1396 static uschar *rsopts[] = { US"f", US"ff", US"r", US"rf", US"rff" };
1398 /* Need to define this in case we need to change the environment in order
1399 to get rid of a bogus time zone. We have to make it char rather than uschar
1400 because some OS define it in /usr/include/unistd.h. */
1402 extern char **environ;
1404 /* If the Exim user and/or group and/or the configuration file owner/group were
1405 defined by ref:name at build time, we must now find the actual uid/gid values.
1406 This is a feature to make the lives of binary distributors easier. */
1408 #ifdef EXIM_USERNAME
1409 if (route_finduser(US EXIM_USERNAME, &pw, &exim_uid))
1413 fprintf(stderr, "exim: refusing to run with uid 0 for \"%s\"\n",
1417 exim_gid = pw->pw_gid;
1421 fprintf(stderr, "exim: failed to find uid for user name \"%s\"\n",
1427 #ifdef EXIM_GROUPNAME
1428 if (!route_findgroup(US EXIM_GROUPNAME, &exim_gid))
1430 fprintf(stderr, "exim: failed to find gid for group name \"%s\"\n",
1436 #ifdef CONFIGURE_OWNERNAME
1437 if (!route_finduser(US CONFIGURE_OWNERNAME, NULL, &config_uid))
1439 fprintf(stderr, "exim: failed to find uid for user name \"%s\"\n",
1440 CONFIGURE_OWNERNAME);
1445 /* We default the system_filter_user to be the Exim run-time user, as a
1446 sane non-root value. */
1447 system_filter_uid = exim_uid;
1449 #ifdef CONFIGURE_GROUPNAME
1450 if (!route_findgroup(US CONFIGURE_GROUPNAME, &config_gid))
1452 fprintf(stderr, "exim: failed to find gid for group name \"%s\"\n",
1453 CONFIGURE_GROUPNAME);
1458 /* In the Cygwin environment, some initialization needs doing. It is fudged
1459 in by means of this macro. */
1465 /* Check a field which is patched when we are running Exim within its
1466 testing harness; do a fast initial check, and then the whole thing. */
1468 running_in_test_harness =
1469 *running_status == '<' && Ustrcmp(running_status, "<<<testing>>>") == 0;
1471 /* The C standard says that the equivalent of setlocale(LC_ALL, "C") is obeyed
1472 at the start of a program; however, it seems that some environments do not
1473 follow this. A "strange" locale can affect the formatting of timestamps, so we
1476 setlocale(LC_ALL, "C");
1478 /* Set up the default handler for timing using alarm(). */
1480 os_non_restarting_signal(SIGALRM, sigalrm_handler);
1482 /* Ensure we have a buffer for constructing log entries. Use malloc directly,
1483 because store_malloc writes a log entry on failure. */
1485 log_buffer = (uschar *)malloc(LOG_BUFFER_SIZE);
1486 if (log_buffer == NULL)
1488 fprintf(stderr, "exim: failed to get store for log buffer\n");
1492 /* Set log_stderr to stderr, provided that stderr exists. This gets reset to
1493 NULL when the daemon is run and the file is closed. We have to use this
1494 indirection, because some systems don't allow writing to the variable "stderr".
1497 if (fstat(fileno(stderr), &statbuf) >= 0) log_stderr = stderr;
1499 /* Arrange for the PCRE regex library to use our store functions. Note that
1500 the normal calls are actually macros that add additional arguments for
1501 debugging purposes so we have to assign specially constructed functions here.
1502 The default is to use store in the stacking pool, but this is overridden in the
1503 regex_must_compile() function. */
1505 pcre_malloc = function_store_get;
1506 pcre_free = function_dummy_free;
1508 /* Ensure there is a big buffer for temporary use in several places. It is put
1509 in malloc store so that it can be freed for enlargement if necessary. */
1511 big_buffer = store_malloc(big_buffer_size);
1513 /* Set up the handler for the data request signal, and set the initial
1514 descriptive text. */
1516 set_process_info("initializing");
1517 os_restarting_signal(SIGUSR1, usr1_handler);
1519 /* SIGHUP is used to get the daemon to reconfigure. It gets set as appropriate
1520 in the daemon code. For the rest of Exim's uses, we ignore it. */
1522 signal(SIGHUP, SIG_IGN);
1524 /* We don't want to die on pipe errors as the code is written to handle
1525 the write error instead. */
1527 signal(SIGPIPE, SIG_IGN);
1529 /* Under some circumstance on some OS, Exim can get called with SIGCHLD
1530 set to SIG_IGN. This causes subprocesses that complete before the parent
1531 process waits for them not to hang around, so when Exim calls wait(), nothing
1532 is there. The wait() code has been made robust against this, but let's ensure
1533 that SIGCHLD is set to SIG_DFL, because it's tidier to wait and get a process
1534 ending status. We use sigaction rather than plain signal() on those OS where
1535 SA_NOCLDWAIT exists, because we want to be sure it is turned off. (There was a
1536 problem on AIX with this.) */
1540 struct sigaction act;
1541 act.sa_handler = SIG_DFL;
1542 sigemptyset(&(act.sa_mask));
1544 sigaction(SIGCHLD, &act, NULL);
1547 signal(SIGCHLD, SIG_DFL);
1550 /* Save the arguments for use if we re-exec exim as a daemon after receiving
1555 /* Set up the version number. Set up the leading 'E' for the external form of
1556 message ids, set the pointer to the internal form, and initialize it to
1557 indicate no message being processed. */
1560 message_id_option[0] = '-';
1561 message_id_external = message_id_option + 1;
1562 message_id_external[0] = 'E';
1563 message_id = message_id_external + 1;
1566 /* Set the umask to zero so that any files Exim creates using open() are
1567 created with the modes that it specifies. NOTE: Files created with fopen() have
1568 a problem, which was not recognized till rather late (February 2006). With this
1569 umask, such files will be world writeable. (They are all content scanning files
1570 in the spool directory, which isn't world-accessible, so this is not a
1571 disaster, but it's untidy.) I don't want to change this overall setting,
1572 however, because it will interact badly with the open() calls. Instead, there's
1573 now a function called modefopen() that fiddles with the umask while calling
1578 /* Precompile the regular expression for matching a message id. Keep this in
1579 step with the code that generates ids in the accept.c module. We need to do
1580 this here, because the -M options check their arguments for syntactic validity
1581 using mac_ismsgid, which uses this. */
1584 regex_must_compile(US"^(?:[^\\W_]{6}-){2}[^\\W_]{2}$", FALSE, TRUE);
1586 /* Precompile the regular expression that is used for matching an SMTP error
1587 code, possibly extended, at the start of an error message. Note that the
1588 terminating whitespace character is included. */
1591 regex_must_compile(US"^\\d\\d\\d\\s(?:\\d\\.\\d\\d?\\d?\\.\\d\\d?\\d?\\s)?",
1594 #ifdef WHITELIST_D_MACROS
1595 /* Precompile the regular expression used to filter the content of macros
1596 given to -D for permissibility. */
1598 regex_whitelisted_macro =
1599 regex_must_compile(US"^[A-Za-z0-9_/.-]*$", FALSE, TRUE);
1603 /* If the program is called as "mailq" treat it as equivalent to "exim -bp";
1604 this seems to be a generally accepted convention, since one finds symbolic
1605 links called "mailq" in standard OS configurations. */
1607 if ((namelen == 5 && Ustrcmp(argv[0], "mailq") == 0) ||
1608 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/mailq", 6) == 0))
1611 receiving_message = FALSE;
1612 called_as = US"-mailq";
1615 /* If the program is called as "rmail" treat it as equivalent to
1616 "exim -i -oee", thus allowing UUCP messages to be input using non-SMTP mode,
1617 i.e. preventing a single dot on a line from terminating the message, and
1618 returning with zero return code, even in cases of error (provided an error
1619 message has been sent). */
1621 if ((namelen == 5 && Ustrcmp(argv[0], "rmail") == 0) ||
1622 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/rmail", 6) == 0))
1625 called_as = US"-rmail";
1626 errors_sender_rc = EXIT_SUCCESS;
1629 /* If the program is called as "rsmtp" treat it as equivalent to "exim -bS";
1630 this is a smail convention. */
1632 if ((namelen == 5 && Ustrcmp(argv[0], "rsmtp") == 0) ||
1633 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/rsmtp", 6) == 0))
1635 smtp_input = smtp_batched_input = TRUE;
1636 called_as = US"-rsmtp";
1639 /* If the program is called as "runq" treat it as equivalent to "exim -q";
1640 this is a smail convention. */
1642 if ((namelen == 4 && Ustrcmp(argv[0], "runq") == 0) ||
1643 (namelen > 4 && Ustrncmp(argv[0] + namelen - 5, "/runq", 5) == 0))
1646 receiving_message = FALSE;
1647 called_as = US"-runq";
1650 /* If the program is called as "newaliases" treat it as equivalent to
1651 "exim -bi"; this is a sendmail convention. */
1653 if ((namelen == 10 && Ustrcmp(argv[0], "newaliases") == 0) ||
1654 (namelen > 10 && Ustrncmp(argv[0] + namelen - 11, "/newaliases", 11) == 0))
1657 receiving_message = FALSE;
1658 called_as = US"-newaliases";
1661 /* Save the original effective uid for a couple of uses later. It should
1662 normally be root, but in some esoteric environments it may not be. */
1664 original_euid = geteuid();
1666 /* Get the real uid and gid. If the caller is root, force the effective uid/gid
1667 to be the same as the real ones. This makes a difference only if Exim is setuid
1668 (or setgid) to something other than root, which could be the case in some
1669 special configurations. */
1671 real_uid = getuid();
1672 real_gid = getgid();
1674 if (real_uid == root_uid)
1676 rv = setgid(real_gid);
1679 fprintf(stderr, "exim: setgid(%ld) failed: %s\n",
1680 (long int)real_gid, strerror(errno));
1683 rv = setuid(real_uid);
1686 fprintf(stderr, "exim: setuid(%ld) failed: %s\n",
1687 (long int)real_uid, strerror(errno));
1692 /* If neither the original real uid nor the original euid was root, Exim is
1693 running in an unprivileged state. */
1695 unprivileged = (real_uid != root_uid && original_euid != root_uid);
1697 /* Scan the program's arguments. Some can be dealt with right away; others are
1698 simply recorded for checking and handling afterwards. Do a high-level switch
1699 on the second character (the one after '-'), to save some effort. */
1701 for (i = 1; i < argc; i++)
1703 BOOL badarg = FALSE;
1704 uschar *arg = argv[i];
1708 /* An argument not starting with '-' is the start of a recipients list;
1709 break out of the options-scanning loop. */
1717 /* An option consistion of -- terminates the options */
1719 if (Ustrcmp(arg, "--") == 0)
1721 recipients_arg = i + 1;
1725 /* Handle flagged options */
1727 switchchar = arg[1];
1730 /* Make all -ex options synonymous with -oex arguments, since that
1731 is assumed by various callers. Also make -qR options synonymous with -R
1732 options, as that seems to be required as well. Allow for -qqR too, and
1733 the same for -S options. */
1735 if (Ustrncmp(arg+1, "oe", 2) == 0 ||
1736 Ustrncmp(arg+1, "qR", 2) == 0 ||
1737 Ustrncmp(arg+1, "qS", 2) == 0)
1739 switchchar = arg[2];
1742 else if (Ustrncmp(arg+1, "qqR", 3) == 0 || Ustrncmp(arg+1, "qqS", 3) == 0)
1744 switchchar = arg[3];
1746 queue_2stage = TRUE;
1749 /* Make -r synonymous with -f, since it is a documented alias */
1751 else if (arg[1] == 'r') switchchar = 'f';
1753 /* Make -ov synonymous with -v */
1755 else if (Ustrcmp(arg, "-ov") == 0)
1761 /* deal with --option_aliases */
1762 else if (switchchar == '-')
1764 if (Ustrcmp(argrest, "help") == 0)
1766 usage_wanted = TRUE;
1769 else if (Ustrcmp(argrest, "version") == 0)
1776 /* High-level switch on active initial letter */
1780 /* -Btype is a sendmail option for 7bit/8bit setting. Exim is 8-bit clean
1781 so has no need of it. */
1784 if (*argrest == 0) i++; /* Skip over the type */
1789 receiving_message = FALSE; /* Reset TRUE for -bm, -bS, -bs below */
1791 /* -bd: Run in daemon mode, awaiting SMTP connections.
1792 -bdf: Ditto, but in the foreground.
1795 if (*argrest == 'd')
1797 daemon_listen = TRUE;
1798 if (*(++argrest) == 'f') background_daemon = FALSE;
1799 else if (*argrest != 0) { badarg = TRUE; break; }
1802 /* -be: Run in expansion test mode
1803 -bem: Ditto, but read a message from a file first
1806 else if (*argrest == 'e')
1808 expansion_test = checking = TRUE;
1809 if (argrest[1] == 'm')
1811 if (++i >= argc) { badarg = TRUE; break; }
1812 expansion_test_message = argv[i];
1815 if (argrest[1] != 0) { badarg = TRUE; break; }
1818 /* -bF: Run system filter test */
1820 else if (*argrest == 'F')
1822 filter_test |= FTEST_SYSTEM;
1823 if (*(++argrest) != 0) { badarg = TRUE; break; }
1824 if (++i < argc) filter_test_sfile = argv[i]; else
1826 fprintf(stderr, "exim: file name expected after %s\n", argv[i-1]);
1831 /* -bf: Run user filter test
1832 -bfd: Set domain for filter testing
1833 -bfl: Set local part for filter testing
1834 -bfp: Set prefix for filter testing
1835 -bfs: Set suffix for filter testing
1838 else if (*argrest == 'f')
1840 if (*(++argrest) == 0)
1842 filter_test |= FTEST_USER;
1843 if (++i < argc) filter_test_ufile = argv[i]; else
1845 fprintf(stderr, "exim: file name expected after %s\n", argv[i-1]);
1853 fprintf(stderr, "exim: string expected after %s\n", arg);
1856 if (Ustrcmp(argrest, "d") == 0) ftest_domain = argv[i];
1857 else if (Ustrcmp(argrest, "l") == 0) ftest_localpart = argv[i];
1858 else if (Ustrcmp(argrest, "p") == 0) ftest_prefix = argv[i];
1859 else if (Ustrcmp(argrest, "s") == 0) ftest_suffix = argv[i];
1860 else { badarg = TRUE; break; }
1864 /* -bh: Host checking - an IP address must follow. */
1866 else if (Ustrcmp(argrest, "h") == 0 || Ustrcmp(argrest, "hc") == 0)
1868 if (++i >= argc) { badarg = TRUE; break; }
1869 sender_host_address = argv[i];
1870 host_checking = checking = log_testing_mode = TRUE;
1871 host_checking_callout = argrest[1] == 'c';
1874 /* -bi: This option is used by sendmail to initialize *the* alias file,
1875 though it has the -oA option to specify a different file. Exim has no
1876 concept of *the* alias file, but since Sun's YP make script calls
1877 sendmail this way, some support must be provided. */
1879 else if (Ustrcmp(argrest, "i") == 0) bi_option = TRUE;
1881 /* -bm: Accept and deliver message - the default option. Reinstate
1882 receiving_message, which got turned off for all -b options. */
1884 else if (Ustrcmp(argrest, "m") == 0) receiving_message = TRUE;
1886 /* -bmalware: test the filename given for malware */
1888 else if (Ustrcmp(argrest, "malware") == 0)
1890 if (++i >= argc) { badarg = TRUE; break; }
1891 malware_test_file = argv[i];
1894 /* -bnq: For locally originating messages, do not qualify unqualified
1895 addresses. In the envelope, this causes errors; in header lines they
1898 else if (Ustrcmp(argrest, "nq") == 0)
1900 allow_unqualified_sender = FALSE;
1901 allow_unqualified_recipient = FALSE;
1904 /* -bpxx: List the contents of the mail queue, in various forms. If
1905 the option is -bpc, just a queue count is needed. Otherwise, if the
1906 first letter after p is r, then order is random. */
1908 else if (*argrest == 'p')
1910 if (*(++argrest) == 'c')
1913 if (*(++argrest) != 0) badarg = TRUE;
1917 if (*argrest == 'r')
1919 list_queue_option = 8;
1922 else list_queue_option = 0;
1926 /* -bp: List the contents of the mail queue, top-level only */
1928 if (*argrest == 0) {}
1930 /* -bpu: List the contents of the mail queue, top-level undelivered */
1932 else if (Ustrcmp(argrest, "u") == 0) list_queue_option += 1;
1934 /* -bpa: List the contents of the mail queue, including all delivered */
1936 else if (Ustrcmp(argrest, "a") == 0) list_queue_option += 2;
1938 /* Unknown after -bp[r] */
1948 /* -bP: List the configuration variables given as the address list.
1949 Force -v, so configuration errors get displayed. */
1951 else if (Ustrcmp(argrest, "P") == 0)
1953 list_options = TRUE;
1954 debug_selector |= D_v;
1955 debug_file = stderr;
1958 /* -brt: Test retry configuration lookup */
1960 else if (Ustrcmp(argrest, "rt") == 0)
1962 test_retry_arg = i + 1;
1966 /* -brw: Test rewrite configuration */
1968 else if (Ustrcmp(argrest, "rw") == 0)
1970 test_rewrite_arg = i + 1;
1974 /* -bS: Read SMTP commands on standard input, but produce no replies -
1975 all errors are reported by sending messages. */
1977 else if (Ustrcmp(argrest, "S") == 0)
1978 smtp_input = smtp_batched_input = receiving_message = TRUE;
1980 /* -bs: Read SMTP commands on standard input and produce SMTP replies
1981 on standard output. */
1983 else if (Ustrcmp(argrest, "s") == 0) smtp_input = receiving_message = TRUE;
1985 /* -bt: address testing mode */
1987 else if (Ustrcmp(argrest, "t") == 0)
1988 address_test_mode = checking = log_testing_mode = TRUE;
1990 /* -bv: verify addresses */
1992 else if (Ustrcmp(argrest, "v") == 0)
1993 verify_address_mode = checking = log_testing_mode = TRUE;
1995 /* -bvs: verify sender addresses */
1997 else if (Ustrcmp(argrest, "vs") == 0)
1999 verify_address_mode = checking = log_testing_mode = TRUE;
2000 verify_as_sender = TRUE;
2003 /* -bV: Print version string and support details */
2005 else if (Ustrcmp(argrest, "V") == 0)
2007 printf("Exim version %s #%s built %s\n", version_string,
2008 version_cnumber, version_date);
2009 printf("%s\n", CS version_copyright);
2010 version_printed = TRUE;
2011 show_whats_supported(stdout);
2018 /* -C: change configuration file list; ignore if it isn't really
2019 a change! Enforce a prefix check if required. */
2024 if(++i < argc) argrest = argv[i]; else
2025 { badarg = TRUE; break; }
2027 if (Ustrcmp(config_main_filelist, argrest) != 0)
2029 #ifdef ALT_CONFIG_PREFIX
2031 int len = Ustrlen(ALT_CONFIG_PREFIX);
2032 uschar *list = argrest;
2034 while((filename = string_nextinlist(&list, &sep, big_buffer,
2035 big_buffer_size)) != NULL)
2037 if ((Ustrlen(filename) < len ||
2038 Ustrncmp(filename, ALT_CONFIG_PREFIX, len) != 0 ||
2039 Ustrstr(filename, "/../") != NULL) &&
2040 (Ustrcmp(filename, "/dev/null") != 0 || real_uid != root_uid))
2042 fprintf(stderr, "-C Permission denied\n");
2047 if (real_uid != root_uid)
2049 #ifdef TRUSTED_CONFIG_LIST
2051 if (real_uid != exim_uid
2052 #ifdef CONFIGURE_OWNER
2053 && real_uid != config_uid
2056 trusted_config = FALSE;
2059 FILE *trust_list = Ufopen(TRUSTED_CONFIG_LIST, "rb");
2062 struct stat statbuf;
2064 if (fstat(fileno(trust_list), &statbuf) != 0 ||
2065 (statbuf.st_uid != root_uid /* owner not root */
2066 #ifdef CONFIGURE_OWNER
2067 && statbuf.st_uid != config_uid /* owner not the special one */
2070 (statbuf.st_gid != root_gid /* group not root */
2071 #ifdef CONFIGURE_GROUP
2072 && statbuf.st_gid != config_gid /* group not the special one */
2074 && (statbuf.st_mode & 020) != 0 /* group writeable */
2076 (statbuf.st_mode & 2) != 0) /* world writeable */
2078 trusted_config = FALSE;
2083 /* Well, the trust list at least is up to scratch... */
2084 void *reset_point = store_get(0);
2085 uschar *trusted_configs[32];
2089 while (Ufgets(big_buffer, big_buffer_size, trust_list))
2091 uschar *start = big_buffer, *nl;
2092 while (*start && isspace(*start))
2096 nl = Ustrchr(start, '\n');
2099 trusted_configs[nr_configs++] = string_copy(start);
2100 if (nr_configs == 32)
2108 uschar *list = argrest;
2110 while (trusted_config && (filename = string_nextinlist(&list,
2111 &sep, big_buffer, big_buffer_size)) != NULL)
2113 for (i=0; i < nr_configs; i++)
2115 if (Ustrcmp(filename, trusted_configs[i]) == 0)
2118 if (i == nr_configs)
2120 trusted_config = FALSE;
2124 store_reset(reset_point);
2128 /* No valid prefixes found in trust_list file. */
2129 trusted_config = FALSE;
2135 /* Could not open trust_list file. */
2136 trusted_config = FALSE;
2140 /* Not root; don't trust config */
2141 trusted_config = FALSE;
2145 config_main_filelist = argrest;
2146 config_changed = TRUE;
2151 /* -D: set up a macro definition */
2154 #ifdef DISABLE_D_OPTION
2155 fprintf(stderr, "exim: -D is not available in this Exim binary\n");
2160 macro_item *mlast = NULL;
2163 uschar *s = argrest;
2165 while (isspace(*s)) s++;
2167 if (*s < 'A' || *s > 'Z')
2169 fprintf(stderr, "exim: macro name set by -D must start with "
2170 "an upper case letter\n");
2174 while (isalnum(*s) || *s == '_')
2176 if (ptr < sizeof(name)-1) name[ptr++] = *s;
2180 if (ptr == 0) { badarg = TRUE; break; }
2181 while (isspace(*s)) s++;
2184 if (*s++ != '=') { badarg = TRUE; break; }
2185 while (isspace(*s)) s++;
2188 for (m = macros; m != NULL; m = m->next)
2190 if (Ustrcmp(m->name, name) == 0)
2192 fprintf(stderr, "exim: duplicated -D in command line\n");
2198 m = store_get(sizeof(macro_item) + Ustrlen(name));
2200 m->command_line = TRUE;
2201 if (mlast == NULL) macros = m; else mlast->next = m;
2202 Ustrcpy(m->name, name);
2203 m->replacement = string_copy(s);
2205 if (clmacro_count >= MAX_CLMACROS)
2207 fprintf(stderr, "exim: too many -D options on command line\n");
2210 clmacros[clmacro_count++] = string_sprintf("-D%s=%s", m->name,
2216 /* -d: Set debug level (see also -v below) or set the drop_cr option.
2217 The latter is now a no-op, retained for compatibility only. If -dd is used,
2218 debugging subprocesses of the daemon is disabled. */
2221 if (Ustrcmp(argrest, "ropcr") == 0)
2223 /* drop_cr = TRUE; */
2226 /* Use an intermediate variable so that we don't set debugging while
2227 decoding the debugging bits. */
2231 unsigned int selector = D_default;
2234 if (*argrest == 'd')
2236 debug_daemon = TRUE;
2240 decode_bits(&selector, NULL, D_memory, 0, argrest, debug_options,
2241 debug_options_count, US"debug", 0);
2242 debug_selector = selector;
2247 /* -E: This is a local error message. This option is not intended for
2248 external use at all, but is not restricted to trusted callers because it
2249 does no harm (just suppresses certain error messages) and if Exim is run
2250 not setuid root it won't always be trusted when it generates error
2251 messages using this option. If there is a message id following -E, point
2252 message_reference at it, for logging. */
2255 local_error_message = TRUE;
2256 if (mac_ismsgid(argrest)) message_reference = argrest;
2260 /* -ex: The vacation program calls sendmail with the undocumented "-eq"
2261 option, so it looks as if historically the -oex options are also callable
2262 without the leading -o. So we have to accept them. Before the switch,
2263 anything starting -oe has been converted to -e. Exim does not support all
2264 of the sendmail error options. */
2267 if (Ustrcmp(argrest, "e") == 0)
2269 arg_error_handling = ERRORS_SENDER;
2270 errors_sender_rc = EXIT_SUCCESS;
2272 else if (Ustrcmp(argrest, "m") == 0) arg_error_handling = ERRORS_SENDER;
2273 else if (Ustrcmp(argrest, "p") == 0) arg_error_handling = ERRORS_STDERR;
2274 else if (Ustrcmp(argrest, "q") == 0) arg_error_handling = ERRORS_STDERR;
2275 else if (Ustrcmp(argrest, "w") == 0) arg_error_handling = ERRORS_SENDER;
2280 /* -F: Set sender's full name, used instead of the gecos entry from
2281 the password file. Since users can usually alter their gecos entries,
2282 there's no security involved in using this instead. The data can follow
2283 the -F or be in the next argument. */
2288 if(++i < argc) argrest = argv[i]; else
2289 { badarg = TRUE; break; }
2291 originator_name = argrest;
2292 sender_name_forced = TRUE;
2296 /* -f: Set sender's address - this value is only actually used if Exim is
2297 run by a trusted user, or if untrusted_set_sender is set and matches the
2298 address, except that the null address can always be set by any user. The
2299 test for this happens later, when the value given here is ignored when not
2300 permitted. For an untrusted user, the actual sender is still put in Sender:
2301 if it doesn't match the From: header (unless no_local_from_check is set).
2302 The data can follow the -f or be in the next argument. The -r switch is an
2303 obsolete form of -f but since there appear to be programs out there that
2304 use anything that sendmail has ever supported, better accept it - the
2305 synonymizing is done before the switch above.
2307 At this stage, we must allow domain literal addresses, because we don't
2308 know what the setting of allow_domain_literals is yet. Ditto for trailing
2309 dots and strip_trailing_dot. */
2317 if (i+1 < argc) argrest = argv[++i]; else
2318 { badarg = TRUE; break; }
2322 sender_address = string_sprintf(""); /* Ensure writeable memory */
2326 uschar *temp = argrest + Ustrlen(argrest) - 1;
2327 while (temp >= argrest && isspace(*temp)) temp--;
2328 if (temp >= argrest && *temp == '.') f_end_dot = TRUE;
2329 allow_domain_literals = TRUE;
2330 strip_trailing_dot = TRUE;
2331 sender_address = parse_extract_address(argrest, &errmess, &start, &end,
2332 &sender_address_domain, TRUE);
2333 allow_domain_literals = FALSE;
2334 strip_trailing_dot = FALSE;
2335 if (sender_address == NULL)
2337 fprintf(stderr, "exim: bad -f address \"%s\": %s\n", argrest, errmess);
2338 return EXIT_FAILURE;
2341 sender_address_forced = TRUE;
2345 /* This is some Sendmail thing which can be ignored */
2350 /* -h: Set the hop count for an incoming message. Exim does not currently
2351 support this; it always computes it by counting the Received: headers.
2352 To put it in will require a change to the spool header file format. */
2357 if(++i < argc) argrest = argv[i]; else
2358 { badarg = TRUE; break; }
2360 if (!isdigit(*argrest)) badarg = TRUE;
2364 /* -i: Set flag so dot doesn't end non-SMTP input (same as -oi, seems
2365 not to be documented for sendmail but mailx (at least) uses it) */
2368 if (*argrest == 0) dot_ends = FALSE; else badarg = TRUE;
2373 receiving_message = FALSE;
2375 /* -MC: continue delivery of another message via an existing open
2376 file descriptor. This option is used for an internal call by the
2377 smtp transport when there is a pending message waiting to go to an
2378 address to which it has got a connection. Five subsequent arguments are
2379 required: transport name, host name, IP address, sequence number, and
2380 message_id. Transports may decline to create new processes if the sequence
2381 number gets too big. The channel is stdin. This (-MC) must be the last
2382 argument. There's a subsequent check that the real-uid is privileged.
2384 If we are running in the test harness. delay for a bit, to let the process
2385 that set this one up complete. This makes for repeatability of the logging,
2388 if (Ustrcmp(argrest, "C") == 0)
2390 union sockaddr_46 interface_sock;
2391 EXIM_SOCKLEN_T size = sizeof(interface_sock);
2395 fprintf(stderr, "exim: too many or too few arguments after -MC\n");
2396 return EXIT_FAILURE;
2399 if (msg_action_arg >= 0)
2401 fprintf(stderr, "exim: incompatible arguments\n");
2402 return EXIT_FAILURE;
2405 continue_transport = argv[++i];
2406 continue_hostname = argv[++i];
2407 continue_host_address = argv[++i];
2408 continue_sequence = Uatoi(argv[++i]);
2409 msg_action = MSG_DELIVER;
2410 msg_action_arg = ++i;
2411 forced_delivery = TRUE;
2412 queue_run_pid = passed_qr_pid;
2413 queue_run_pipe = passed_qr_pipe;
2415 if (!mac_ismsgid(argv[i]))
2417 fprintf(stderr, "exim: malformed message id %s after -MC option\n",
2419 return EXIT_FAILURE;
2422 /* Set up $sending_ip_address and $sending_port */
2424 if (getsockname(fileno(stdin), (struct sockaddr *)(&interface_sock),
2426 sending_ip_address = host_ntoa(-1, &interface_sock, NULL,
2430 fprintf(stderr, "exim: getsockname() failed after -MC option: %s\n",
2432 return EXIT_FAILURE;
2435 if (running_in_test_harness) millisleep(500);
2439 /* -MCA: set the smtp_authenticated flag; this is useful only when it
2440 precedes -MC (see above). The flag indicates that the host to which
2441 Exim is connected has accepted an AUTH sequence. */
2443 else if (Ustrcmp(argrest, "CA") == 0)
2445 smtp_authenticated = TRUE;
2449 /* -MCP: set the smtp_use_pipelining flag; this is useful only when
2450 it preceded -MC (see above) */
2452 else if (Ustrcmp(argrest, "CP") == 0)
2454 smtp_use_pipelining = TRUE;
2458 /* -MCQ: pass on the pid of the queue-running process that started
2459 this chain of deliveries and the fd of its synchronizing pipe; this
2460 is useful only when it precedes -MC (see above) */
2462 else if (Ustrcmp(argrest, "CQ") == 0)
2464 if(++i < argc) passed_qr_pid = (pid_t)(Uatol(argv[i]));
2466 if(++i < argc) passed_qr_pipe = (int)(Uatol(argv[i]));
2471 /* -MCS: set the smtp_use_size flag; this is useful only when it
2472 precedes -MC (see above) */
2474 else if (Ustrcmp(argrest, "CS") == 0)
2476 smtp_use_size = TRUE;
2480 /* -MCT: set the tls_offered flag; this is useful only when it
2481 precedes -MC (see above). The flag indicates that the host to which
2482 Exim is connected has offered TLS support. */
2485 else if (Ustrcmp(argrest, "CT") == 0)
2492 /* -M[x]: various operations on the following list of message ids:
2493 -M deliver the messages, ignoring next retry times and thawing
2494 -Mc deliver the messages, checking next retry times, no thawing
2495 -Mf freeze the messages
2496 -Mg give up on the messages
2497 -Mt thaw the messages
2498 -Mrm remove the messages
2499 In the above cases, this must be the last option. There are also the
2500 following options which are followed by a single message id, and which
2501 act on that message. Some of them use the "recipient" addresses as well.
2502 -Mar add recipient(s)
2503 -Mmad mark all recipients delivered
2504 -Mmd mark recipients(s) delivered
2506 -Mset load a message for use with -be
2508 -Mvc show copy (of whole message, in RFC 2822 format)
2513 else if (*argrest == 0)
2515 msg_action = MSG_DELIVER;
2516 forced_delivery = deliver_force_thaw = TRUE;
2518 else if (Ustrcmp(argrest, "ar") == 0)
2520 msg_action = MSG_ADD_RECIPIENT;
2521 one_msg_action = TRUE;
2523 else if (Ustrcmp(argrest, "c") == 0) msg_action = MSG_DELIVER;
2524 else if (Ustrcmp(argrest, "es") == 0)
2526 msg_action = MSG_EDIT_SENDER;
2527 one_msg_action = TRUE;
2529 else if (Ustrcmp(argrest, "f") == 0) msg_action = MSG_FREEZE;
2530 else if (Ustrcmp(argrest, "g") == 0)
2532 msg_action = MSG_DELIVER;
2533 deliver_give_up = TRUE;
2535 else if (Ustrcmp(argrest, "mad") == 0)
2537 msg_action = MSG_MARK_ALL_DELIVERED;
2539 else if (Ustrcmp(argrest, "md") == 0)
2541 msg_action = MSG_MARK_DELIVERED;
2542 one_msg_action = TRUE;
2544 else if (Ustrcmp(argrest, "rm") == 0) msg_action = MSG_REMOVE;
2545 else if (Ustrcmp(argrest, "set") == 0)
2547 msg_action = MSG_LOAD;
2548 one_msg_action = TRUE;
2550 else if (Ustrcmp(argrest, "t") == 0) msg_action = MSG_THAW;
2551 else if (Ustrcmp(argrest, "vb") == 0)
2553 msg_action = MSG_SHOW_BODY;
2554 one_msg_action = TRUE;
2556 else if (Ustrcmp(argrest, "vc") == 0)
2558 msg_action = MSG_SHOW_COPY;
2559 one_msg_action = TRUE;
2561 else if (Ustrcmp(argrest, "vh") == 0)
2563 msg_action = MSG_SHOW_HEADER;
2564 one_msg_action = TRUE;
2566 else if (Ustrcmp(argrest, "vl") == 0)
2568 msg_action = MSG_SHOW_LOG;
2569 one_msg_action = TRUE;
2571 else { badarg = TRUE; break; }
2573 /* All the -Mxx options require at least one message id. */
2575 msg_action_arg = i + 1;
2576 if (msg_action_arg >= argc)
2578 fprintf(stderr, "exim: no message ids given after %s option\n", arg);
2579 return EXIT_FAILURE;
2582 /* Some require only message ids to follow */
2584 if (!one_msg_action)
2587 for (j = msg_action_arg; j < argc; j++) if (!mac_ismsgid(argv[j]))
2589 fprintf(stderr, "exim: malformed message id %s after %s option\n",
2591 return EXIT_FAILURE;
2593 goto END_ARG; /* Remaining args are ids */
2596 /* Others require only one message id, possibly followed by addresses,
2597 which will be handled as normal arguments. */
2601 if (!mac_ismsgid(argv[msg_action_arg]))
2603 fprintf(stderr, "exim: malformed message id %s after %s option\n",
2604 argv[msg_action_arg], arg);
2605 return EXIT_FAILURE;
2612 /* Some programs seem to call the -om option without the leading o;
2613 for sendmail it askes for "me too". Exim always does this. */
2616 if (*argrest != 0) badarg = TRUE;
2620 /* -N: don't do delivery - a debugging option that stops transports doing
2621 their thing. It implies debugging at the D_v level. */
2626 dont_deliver = TRUE;
2627 debug_selector |= D_v;
2628 debug_file = stderr;
2634 /* -n: This means "don't alias" in sendmail, apparently. Just ignore
2640 /* -O: Just ignore it. In sendmail, apparently -O option=value means set
2641 option to the specified value. This form uses long names. We need to handle
2642 -O option=value and -Ooption=value. */
2649 fprintf(stderr, "exim: string expected after -O\n");
2657 /* -oA: Set an argument for the bi command (sendmail's "alternate alias
2660 if (*argrest == 'A')
2662 alias_arg = argrest + 1;
2663 if (alias_arg[0] == 0)
2665 if (i+1 < argc) alias_arg = argv[++i]; else
2667 fprintf(stderr, "exim: string expected after -oA\n");
2673 /* -oB: Set a connection message max value for remote deliveries */
2675 else if (*argrest == 'B')
2677 uschar *p = argrest + 1;
2680 if (i+1 < argc && isdigit((argv[i+1][0]))) p = argv[++i]; else
2682 connection_max_messages = 1;
2691 fprintf(stderr, "exim: number expected after -oB\n");
2694 connection_max_messages = Uatoi(p);
2698 /* -odb: background delivery */
2700 else if (Ustrcmp(argrest, "db") == 0)
2702 synchronous_delivery = FALSE;
2703 arg_queue_only = FALSE;
2704 queue_only_set = TRUE;
2707 /* -odf: foreground delivery (smail-compatible option); same effect as
2708 -odi: interactive (synchronous) delivery (sendmail-compatible option)
2711 else if (Ustrcmp(argrest, "df") == 0 || Ustrcmp(argrest, "di") == 0)
2713 synchronous_delivery = TRUE;
2714 arg_queue_only = FALSE;
2715 queue_only_set = TRUE;
2718 /* -odq: queue only */
2720 else if (Ustrcmp(argrest, "dq") == 0)
2722 synchronous_delivery = FALSE;
2723 arg_queue_only = TRUE;
2724 queue_only_set = TRUE;
2727 /* -odqs: queue SMTP only - do local deliveries and remote routing,
2728 but no remote delivery */
2730 else if (Ustrcmp(argrest, "dqs") == 0)
2733 arg_queue_only = FALSE;
2734 queue_only_set = TRUE;
2737 /* -oex: Sendmail error flags. As these are also accepted without the
2738 leading -o prefix, for compatibility with vacation and other callers,
2739 they are handled with -e above. */
2741 /* -oi: Set flag so dot doesn't end non-SMTP input (same as -i)
2742 -oitrue: Another sendmail syntax for the same */
2744 else if (Ustrcmp(argrest, "i") == 0 ||
2745 Ustrcmp(argrest, "itrue") == 0)
2748 /* -oM*: Set various characteristics for an incoming message; actually
2749 acted on for trusted callers only. */
2751 else if (*argrest == 'M')
2755 fprintf(stderr, "exim: data expected after -o%s\n", argrest);
2759 /* -oMa: Set sender host address */
2761 if (Ustrcmp(argrest, "Ma") == 0) sender_host_address = argv[++i];
2763 /* -oMaa: Set authenticator name */
2765 else if (Ustrcmp(argrest, "Maa") == 0)
2766 sender_host_authenticated = argv[++i];
2768 /* -oMas: setting authenticated sender */
2770 else if (Ustrcmp(argrest, "Mas") == 0) authenticated_sender = argv[++i];
2772 /* -oMai: setting authenticated id */
2774 else if (Ustrcmp(argrest, "Mai") == 0) authenticated_id = argv[++i];
2776 /* -oMi: Set incoming interface address */
2778 else if (Ustrcmp(argrest, "Mi") == 0) interface_address = argv[++i];
2780 /* -oMr: Received protocol */
2782 else if (Ustrcmp(argrest, "Mr") == 0) received_protocol = argv[++i];
2784 /* -oMs: Set sender host name */
2786 else if (Ustrcmp(argrest, "Ms") == 0) sender_host_name = argv[++i];
2788 /* -oMt: Set sender ident */
2790 else if (Ustrcmp(argrest, "Mt") == 0)
2792 sender_ident_set = TRUE;
2793 sender_ident = argv[++i];
2796 /* Else a bad argument */
2805 /* -om: Me-too flag for aliases. Exim always does this. Some programs
2806 seem to call this as -m (undocumented), so that is also accepted (see
2809 else if (Ustrcmp(argrest, "m") == 0) {}
2811 /* -oo: An ancient flag for old-style addresses which still seems to
2812 crop up in some calls (see in SCO). */
2814 else if (Ustrcmp(argrest, "o") == 0) {}
2816 /* -oP <name>: set pid file path for daemon */
2818 else if (Ustrcmp(argrest, "P") == 0)
2819 override_pid_file_path = argv[++i];
2821 /* -or <n>: set timeout for non-SMTP acceptance
2822 -os <n>: set timeout for SMTP acceptance */
2824 else if (*argrest == 'r' || *argrest == 's')
2826 int *tp = (*argrest == 'r')?
2827 &arg_receive_timeout : &arg_smtp_receive_timeout;
2828 if (argrest[1] == 0)
2830 if (i+1 < argc) *tp= readconf_readtime(argv[++i], 0, FALSE);
2832 else *tp = readconf_readtime(argrest + 1, 0, FALSE);
2835 fprintf(stderr, "exim: bad time value %s: abandoned\n", argv[i]);
2840 /* -oX <list>: Override local_interfaces and/or default daemon ports */
2842 else if (Ustrcmp(argrest, "X") == 0)
2843 override_local_interfaces = argv[++i];
2845 /* Unknown -o argument */
2851 /* -ps: force Perl startup; -pd force delayed Perl startup */
2855 if (*argrest == 's' && argrest[1] == 0)
2857 perl_start_option = 1;
2860 if (*argrest == 'd' && argrest[1] == 0)
2862 perl_start_option = -1;
2867 /* -panythingelse is taken as the Sendmail-compatible argument -prval:sval,
2868 which sets the host protocol and host name */
2872 if (i+1 < argc) argrest = argv[++i]; else
2873 { badarg = TRUE; break; }
2878 uschar *hn = Ustrchr(argrest, ':');
2881 received_protocol = argrest;
2885 received_protocol = string_copyn(argrest, hn - argrest);
2886 sender_host_name = hn + 1;
2893 receiving_message = FALSE;
2894 if (queue_interval >= 0)
2896 fprintf(stderr, "exim: -q specified more than once\n");
2900 /* -qq...: Do queue runs in a 2-stage manner */
2902 if (*argrest == 'q')
2904 queue_2stage = TRUE;
2908 /* -qi...: Do only first (initial) deliveries */
2910 if (*argrest == 'i')
2912 queue_run_first_delivery = TRUE;
2916 /* -qf...: Run the queue, forcing deliveries
2917 -qff..: Ditto, forcing thawing as well */
2919 if (*argrest == 'f')
2921 queue_run_force = TRUE;
2922 if (*(++argrest) == 'f')
2924 deliver_force_thaw = TRUE;
2929 /* -q[f][f]l...: Run the queue only on local deliveries */
2931 if (*argrest == 'l')
2933 queue_run_local = TRUE;
2937 /* -q[f][f][l]: Run the queue, optionally forced, optionally local only,
2938 optionally starting from a given message id. */
2940 if (*argrest == 0 &&
2941 (i + 1 >= argc || argv[i+1][0] == '-' || mac_ismsgid(argv[i+1])))
2944 if (i+1 < argc && mac_ismsgid(argv[i+1]))
2945 start_queue_run_id = argv[++i];
2946 if (i+1 < argc && mac_ismsgid(argv[i+1]))
2947 stop_queue_run_id = argv[++i];
2950 /* -q[f][f][l]<n>: Run the queue at regular intervals, optionally forced,
2951 optionally local only. */
2956 queue_interval = readconf_readtime(argrest, 0, FALSE);
2958 queue_interval = readconf_readtime(argv[++i], 0, FALSE);
2959 if (queue_interval <= 0)
2961 fprintf(stderr, "exim: bad time value %s: abandoned\n", argv[i]);
2968 case 'R': /* Synonymous with -qR... */
2969 receiving_message = FALSE;
2971 /* -Rf: As -R (below) but force all deliveries,
2972 -Rff: Ditto, but also thaw all frozen messages,
2973 -Rr: String is regex
2974 -Rrf: Regex and force
2975 -Rrff: Regex and force and thaw
2977 in all cases provided there are no further characters in this
2983 for (i = 0; i < sizeof(rsopts)/sizeof(uschar *); i++)
2985 if (Ustrcmp(argrest, rsopts[i]) == 0)
2987 if (i != 2) queue_run_force = TRUE;
2988 if (i >= 2) deliver_selectstring_regex = TRUE;
2989 if (i == 1 || i == 4) deliver_force_thaw = TRUE;
2990 argrest += Ustrlen(rsopts[i]);
2995 /* -R: Set string to match in addresses for forced queue run to
2996 pick out particular messages. */
3000 if (i+1 < argc) deliver_selectstring = argv[++i]; else
3002 fprintf(stderr, "exim: string expected after -R\n");
3006 else deliver_selectstring = argrest;
3010 /* -r: an obsolete synonym for -f (see above) */
3013 /* -S: Like -R but works on sender. */
3015 case 'S': /* Synonymous with -qS... */
3016 receiving_message = FALSE;
3018 /* -Sf: As -S (below) but force all deliveries,
3019 -Sff: Ditto, but also thaw all frozen messages,
3020 -Sr: String is regex
3021 -Srf: Regex and force
3022 -Srff: Regex and force and thaw
3024 in all cases provided there are no further characters in this
3030 for (i = 0; i < sizeof(rsopts)/sizeof(uschar *); i++)
3032 if (Ustrcmp(argrest, rsopts[i]) == 0)
3034 if (i != 2) queue_run_force = TRUE;
3035 if (i >= 2) deliver_selectstring_sender_regex = TRUE;
3036 if (i == 1 || i == 4) deliver_force_thaw = TRUE;
3037 argrest += Ustrlen(rsopts[i]);
3042 /* -S: Set string to match in addresses for forced queue run to
3043 pick out particular messages. */
3047 if (i+1 < argc) deliver_selectstring_sender = argv[++i]; else
3049 fprintf(stderr, "exim: string expected after -S\n");
3053 else deliver_selectstring_sender = argrest;
3056 /* -Tqt is an option that is exclusively for use by the testing suite.
3057 It is not recognized in other circumstances. It allows for the setting up
3058 of explicit "queue times" so that various warning/retry things can be
3059 tested. Otherwise variability of clock ticks etc. cause problems. */
3062 if (running_in_test_harness && Ustrcmp(argrest, "qt") == 0)
3063 fudged_queue_times = argv[++i];
3068 /* -t: Set flag to extract recipients from body of message. */
3071 if (*argrest == 0) extract_recipients = TRUE;
3073 /* -ti: Set flag to extract recipients from body of message, and also
3074 specify that dot does not end the message. */
3076 else if (Ustrcmp(argrest, "i") == 0)
3078 extract_recipients = TRUE;
3082 /* -tls-on-connect: don't wait for STARTTLS (for old clients) */
3085 else if (Ustrcmp(argrest, "ls-on-connect") == 0) tls_on_connect = TRUE;
3092 /* -U: This means "initial user submission" in sendmail, apparently. The
3093 doc claims that in future sendmail may refuse syntactically invalid
3094 messages instead of fixing them. For the moment, we just ignore it. */
3100 /* -v: verify things - this is a very low-level debugging */
3105 debug_selector |= D_v;
3106 debug_file = stderr;
3112 /* -x: AIX uses this to indicate some fancy 8-bit character stuff:
3114 The -x flag tells the sendmail command that mail from a local
3115 mail program has National Language Support (NLS) extended characters
3116 in the body of the mail item. The sendmail command can send mail with
3117 extended NLS characters across networks that normally corrupts these
3120 As Exim is 8-bit clean, it just ignores this flag. */
3123 if (*argrest != 0) badarg = TRUE;
3126 /* All other initial characters are errors */
3131 } /* End of high-level switch statement */
3133 /* Failed to recognize the option, or syntax error */
3137 fprintf(stderr, "exim abandoned: unknown, malformed, or incomplete "
3138 "option %s\n", arg);
3144 /* If -R or -S have been specified without -q, assume a single queue run. */
3146 if ((deliver_selectstring != NULL || deliver_selectstring_sender != NULL) &&
3147 queue_interval < 0) queue_interval = 0;
3151 /* If usage_wanted is set we call the usage function - which never returns */
3152 if (usage_wanted) exim_usage(called_as);
3154 /* Arguments have been processed. Check for incompatibilities. */
3156 (smtp_input || extract_recipients || recipients_arg < argc) &&
3157 (daemon_listen || queue_interval >= 0 || bi_option ||
3158 test_retry_arg >= 0 || test_rewrite_arg >= 0 ||
3159 filter_test != FTEST_NONE || (msg_action_arg > 0 && !one_msg_action))
3162 msg_action_arg > 0 &&
3163 (daemon_listen || queue_interval >= 0 || list_options ||
3164 (checking && msg_action != MSG_LOAD) ||
3165 bi_option || test_retry_arg >= 0 || test_rewrite_arg >= 0)
3168 (daemon_listen || queue_interval >= 0) &&
3169 (sender_address != NULL || list_options || list_queue || checking ||
3173 daemon_listen && queue_interval == 0
3177 (checking || smtp_input || extract_recipients ||
3178 filter_test != FTEST_NONE || bi_option)
3181 verify_address_mode &&
3182 (address_test_mode || smtp_input || extract_recipients ||
3183 filter_test != FTEST_NONE || bi_option)
3186 address_test_mode && (smtp_input || extract_recipients ||
3187 filter_test != FTEST_NONE || bi_option)
3190 smtp_input && (sender_address != NULL || filter_test != FTEST_NONE ||
3194 deliver_selectstring != NULL && queue_interval < 0
3197 msg_action == MSG_LOAD &&
3198 (!expansion_test || expansion_test_message != NULL)
3202 fprintf(stderr, "exim: incompatible command-line options or arguments\n");
3206 /* If debugging is set up, set the file and the file descriptor to pass on to
3207 child processes. It should, of course, be 2 for stderr. Also, force the daemon
3208 to run in the foreground. */
3210 if (debug_selector != 0)
3212 debug_file = stderr;
3213 debug_fd = fileno(debug_file);
3214 background_daemon = FALSE;
3215 if (running_in_test_harness) millisleep(100); /* lets caller finish */
3216 if (debug_selector != D_v) /* -v only doesn't show this */
3218 debug_printf("Exim version %s uid=%ld gid=%ld pid=%d D=%x\n",
3219 version_string, (long int)real_uid, (long int)real_gid, (int)getpid(),
3221 if (!version_printed)
3222 show_whats_supported(stderr);
3226 /* When started with root privilege, ensure that the limits on the number of
3227 open files and the number of processes (where that is accessible) are
3228 sufficiently large, or are unset, in case Exim has been called from an
3229 environment where the limits are screwed down. Not all OS have the ability to
3230 change some of these limits. */
3234 DEBUG(D_any) debug_print_ids(US"Exim has no root privilege:");
3240 #ifdef RLIMIT_NOFILE
3241 if (getrlimit(RLIMIT_NOFILE, &rlp) < 0)
3243 log_write(0, LOG_MAIN|LOG_PANIC, "getrlimit(RLIMIT_NOFILE) failed: %s",
3245 rlp.rlim_cur = rlp.rlim_max = 0;
3248 /* I originally chose 1000 as a nice big number that was unlikely to
3249 be exceeded. It turns out that some older OS have a fixed upper limit of
3252 if (rlp.rlim_cur < 1000)
3254 rlp.rlim_cur = rlp.rlim_max = 1000;
3255 if (setrlimit(RLIMIT_NOFILE, &rlp) < 0)
3257 rlp.rlim_cur = rlp.rlim_max = 256;
3258 if (setrlimit(RLIMIT_NOFILE, &rlp) < 0)
3259 log_write(0, LOG_MAIN|LOG_PANIC, "setrlimit(RLIMIT_NOFILE) failed: %s",
3266 if (getrlimit(RLIMIT_NPROC, &rlp) < 0)
3268 log_write(0, LOG_MAIN|LOG_PANIC, "getrlimit(RLIMIT_NPROC) failed: %s",
3270 rlp.rlim_cur = rlp.rlim_max = 0;
3273 #ifdef RLIM_INFINITY
3274 if (rlp.rlim_cur != RLIM_INFINITY && rlp.rlim_cur < 1000)
3276 rlp.rlim_cur = rlp.rlim_max = RLIM_INFINITY;
3278 if (rlp.rlim_cur < 1000)
3280 rlp.rlim_cur = rlp.rlim_max = 1000;
3282 if (setrlimit(RLIMIT_NPROC, &rlp) < 0)
3283 log_write(0, LOG_MAIN|LOG_PANIC, "setrlimit(RLIMIT_NPROC) failed: %s",
3289 /* Exim is normally entered as root (but some special configurations are
3290 possible that don't do this). However, it always spins off sub-processes that
3291 set their uid and gid as required for local delivery. We don't want to pass on
3292 any extra groups that root may belong to, so we want to get rid of them all at
3295 We need to obey setgroups() at this stage, before possibly giving up root
3296 privilege for a changed configuration file, but later on we might need to
3297 check on the additional groups for the admin user privilege - can't do that
3298 till after reading the config, which might specify the exim gid. Therefore,
3299 save the group list here first. */
3301 group_count = getgroups(NGROUPS_MAX, group_list);
3302 if (group_count < 0)
3304 fprintf(stderr, "exim: getgroups() failed: %s\n", strerror(errno));
3308 /* There is a fundamental difference in some BSD systems in the matter of
3309 groups. FreeBSD and BSDI are known to be different; NetBSD and OpenBSD are
3310 known not to be different. On the "different" systems there is a single group
3311 list, and the first entry in it is the current group. On all other versions of
3312 Unix there is a supplementary group list, which is in *addition* to the current
3313 group. Consequently, to get rid of all extraneous groups on a "standard" system
3314 you pass over 0 groups to setgroups(), while on a "different" system you pass
3315 over a single group - the current group, which is always the first group in the
3316 list. Calling setgroups() with zero groups on a "different" system results in
3317 an error return. The following code should cope with both types of system.
3319 However, if this process isn't running as root, setgroups() can't be used
3320 since you have to be root to run it, even if throwing away groups. Not being
3321 root here happens only in some unusual configurations. We just ignore the
3324 if (setgroups(0, NULL) != 0)
3326 if (setgroups(1, group_list) != 0 && !unprivileged)
3328 fprintf(stderr, "exim: setgroups() failed: %s\n", strerror(errno));
3333 /* If the configuration file name has been altered by an argument on the
3334 command line (either a new file name or a macro definition) and the caller is
3335 not root, or if this is a filter testing run, remove any setuid privilege the
3336 program has and run as the underlying user.
3338 The exim user is locked out of this, which severely restricts the use of -C
3341 Otherwise, set the real ids to the effective values (should be root unless run
3342 from inetd, which it can either be root or the exim uid, if one is configured).
3344 There is a private mechanism for bypassing some of this, in order to make it
3345 possible to test lots of configurations automatically, without having either to
3346 recompile each time, or to patch in an actual configuration file name and other
3347 values (such as the path name). If running in the test harness, pretend that
3348 configuration file changes and macro definitions haven't happened. */
3351 (!trusted_config || /* Config changed, or */
3352 !macros_trusted()) && /* impermissible macros and */
3353 real_uid != root_uid && /* Not root, and */
3354 !running_in_test_harness /* Not fudged */
3356 expansion_test /* expansion testing */
3358 filter_test != FTEST_NONE) /* Filter testing */
3360 setgroups(group_count, group_list);
3361 exim_setugid(real_uid, real_gid, FALSE,
3362 US"-C, -D, -be or -bf forces real uid");
3363 removed_privilege = TRUE;
3365 /* In the normal case when Exim is called like this, stderr is available
3366 and should be used for any logging information because attempts to write
3367 to the log will usually fail. To arrange this, we unset really_exim. However,
3368 if no stderr is available there is no point - we might as well have a go
3369 at the log (if it fails, syslog will be written).
3371 Note that if the invoker is Exim, the logs remain available. Messing with
3372 this causes unlogged successful deliveries. */
3374 if ((log_stderr != NULL) && (real_uid != exim_uid))
3375 really_exim = FALSE;
3378 /* Privilege is to be retained for the moment. It may be dropped later,
3379 depending on the job that this Exim process has been asked to do. For now, set
3380 the real uid to the effective so that subsequent re-execs of Exim are done by a
3383 else exim_setugid(geteuid(), getegid(), FALSE, US"forcing real = effective");
3385 /* If testing a filter, open the file(s) now, before wasting time doing other
3386 setups and reading the message. */
3388 if ((filter_test & FTEST_SYSTEM) != 0)
3390 filter_sfd = Uopen(filter_test_sfile, O_RDONLY, 0);
3393 fprintf(stderr, "exim: failed to open %s: %s\n", filter_test_sfile,
3395 return EXIT_FAILURE;
3399 if ((filter_test & FTEST_USER) != 0)
3401 filter_ufd = Uopen(filter_test_ufile, O_RDONLY, 0);
3404 fprintf(stderr, "exim: failed to open %s: %s\n", filter_test_ufile,
3406 return EXIT_FAILURE;
3410 /* Read the main runtime configuration data; this gives up if there
3411 is a failure. It leaves the configuration file open so that the subsequent
3412 configuration data for delivery can be read if needed. */
3416 /* Handle the decoding of logging options. */
3418 decode_bits(&log_write_selector, &log_extra_selector, 0, 0,
3419 log_selector_string, log_options, log_options_count, US"log", 0);
3423 debug_printf("configuration file is %s\n", config_main_filename);
3424 debug_printf("log selectors = %08x %08x\n", log_write_selector,
3425 log_extra_selector);
3428 /* If domain literals are not allowed, check the sender address that was
3429 supplied with -f. Ditto for a stripped trailing dot. */
3431 if (sender_address != NULL)
3433 if (sender_address[sender_address_domain] == '[' && !allow_domain_literals)
3435 fprintf(stderr, "exim: bad -f address \"%s\": domain literals not "
3436 "allowed\n", sender_address);
3437 return EXIT_FAILURE;
3439 if (f_end_dot && !strip_trailing_dot)
3441 fprintf(stderr, "exim: bad -f address \"%s.\": domain is malformed "
3442 "(trailing dot not allowed)\n", sender_address);
3443 return EXIT_FAILURE;
3447 /* Paranoia check of maximum lengths of certain strings. There is a check
3448 on the length of the log file path in log.c, which will come into effect
3449 if there are any calls to write the log earlier than this. However, if we
3450 get this far but the string is very long, it is better to stop now than to
3451 carry on and (e.g.) receive a message and then have to collapse. The call to
3452 log_write() from here will cause the ultimate panic collapse if the complete
3453 file name exceeds the buffer length. */
3455 if (Ustrlen(log_file_path) > 200)
3456 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3457 "log_file_path is longer than 200 chars: aborting");
3459 if (Ustrlen(pid_file_path) > 200)
3460 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3461 "pid_file_path is longer than 200 chars: aborting");
3463 if (Ustrlen(spool_directory) > 200)
3464 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3465 "spool_directory is longer than 200 chars: aborting");
3467 /* Length check on the process name given to syslog for its TAG field,
3468 which is only permitted to be 32 characters or less. See RFC 3164. */
3470 if (Ustrlen(syslog_processname) > 32)
3471 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3472 "syslog_processname is longer than 32 chars: aborting");
3474 /* In some operating systems, the environment variable TMPDIR controls where
3475 temporary files are created; Exim doesn't use these (apart from when delivering
3476 to MBX mailboxes), but called libraries such as DBM libraries may require them.
3477 If TMPDIR is found in the environment, reset it to the value defined in the
3478 TMPDIR macro, if this macro is defined. */
3483 for (p = USS environ; *p != NULL; p++)
3485 if (Ustrncmp(*p, "TMPDIR=", 7) == 0 &&
3486 Ustrcmp(*p+7, TMPDIR) != 0)
3488 uschar *newp = malloc(Ustrlen(TMPDIR) + 8);
3489 sprintf(CS newp, "TMPDIR=%s", TMPDIR);
3491 DEBUG(D_any) debug_printf("reset TMPDIR=%s in environment\n", TMPDIR);
3497 /* Timezone handling. If timezone_string is "utc", set a flag to cause all
3498 timestamps to be in UTC (gmtime() is used instead of localtime()). Otherwise,
3499 we may need to get rid of a bogus timezone setting. This can arise when Exim is
3500 called by a user who has set the TZ variable. This then affects the timestamps
3501 in log files and in Received: headers, and any created Date: header lines. The
3502 required timezone is settable in the configuration file, so nothing can be done
3503 about this earlier - but hopefully nothing will normally be logged earlier than
3504 this. We have to make a new environment if TZ is wrong, but don't bother if
3505 timestamps_utc is set, because then all times are in UTC anyway. */
3507 if (timezone_string != NULL && strcmpic(timezone_string, US"UTC") == 0)
3509 timestamps_utc = TRUE;
3513 uschar *envtz = US getenv("TZ");
3514 if ((envtz == NULL && timezone_string != NULL) ||
3516 (timezone_string == NULL ||
3517 Ustrcmp(timezone_string, envtz) != 0)))
3519 uschar **p = USS environ;
3523 while (*p++ != NULL) count++;
3524 if (envtz == NULL) count++;
3525 newp = new = malloc(sizeof(uschar *) * (count + 1));
3526 for (p = USS environ; *p != NULL; p++)
3528 if (Ustrncmp(*p, "TZ=", 3) == 0) continue;
3531 if (timezone_string != NULL)
3533 *newp = malloc(Ustrlen(timezone_string) + 4);
3534 sprintf(CS *newp++, "TZ=%s", timezone_string);
3539 DEBUG(D_any) debug_printf("Reset TZ to %s: time is %s\n", timezone_string,
3540 tod_stamp(tod_log));
3544 /* Handle the case when we have removed the setuid privilege because of -C or
3545 -D. This means that the caller of Exim was not root.
3547 There is a problem if we were running as the Exim user. The sysadmin may
3548 expect this case to retain privilege because "the binary was called by the
3549 Exim user", but it hasn't, because either the -D option set macros, or the
3550 -C option set a non-trusted configuration file. There are two possibilities:
3552 (1) If deliver_drop_privilege is set, Exim is not going to re-exec in order
3553 to do message deliveries. Thus, the fact that it is running as a
3554 non-privileged user is plausible, and might be wanted in some special
3555 configurations. However, really_exim will have been set false when
3556 privilege was dropped, to stop Exim trying to write to its normal log
3557 files. Therefore, re-enable normal log processing, assuming the sysadmin
3558 has set up the log directory correctly.
3560 (2) If deliver_drop_privilege is not set, the configuration won't work as
3561 apparently intended, and so we log a panic message. In order to retain
3562 root for -C or -D, the caller must either be root or be invoking a
3563 trusted configuration file (when deliver_drop_privilege is false). */
3565 if (removed_privilege && (!trusted_config || macros != NULL) &&
3566 real_uid == exim_uid)
3568 if (deliver_drop_privilege)
3569 really_exim = TRUE; /* let logging work normally */
3571 log_write(0, LOG_MAIN|LOG_PANIC,
3572 "exim user lost privilege for using %s option",
3573 trusted_config? "-D" : "-C");
3576 /* Start up Perl interpreter if Perl support is configured and there is a
3577 perl_startup option, and the configuration or the command line specifies
3578 initializing starting. Note that the global variables are actually called
3579 opt_perl_xxx to avoid clashing with perl's namespace (perl_*). */
3582 if (perl_start_option != 0)
3583 opt_perl_at_start = (perl_start_option > 0);
3584 if (opt_perl_at_start && opt_perl_startup != NULL)
3587 DEBUG(D_any) debug_printf("Starting Perl interpreter\n");
3588 errstr = init_perl(opt_perl_startup);
3591 fprintf(stderr, "exim: error in perl_startup code: %s\n", errstr);
3592 return EXIT_FAILURE;
3594 opt_perl_started = TRUE;
3596 #endif /* EXIM_PERL */
3598 /* Initialise lookup_list
3599 If debugging, already called above via version reporting.
3600 This does mean that debugging causes the list to be initialised while root.
3601 This *should* be harmless -- all modules are loaded from a fixed dir and
3602 it's code that would, if not a module, be part of Exim already. */
3605 /* Log the arguments of the call if the configuration file said so. This is
3606 a debugging feature for finding out what arguments certain MUAs actually use.
3607 Don't attempt it if logging is disabled, or if listing variables or if
3608 verifying/testing addresses or expansions. */
3610 if (((debug_selector & D_any) != 0 || (log_extra_selector & LX_arguments) != 0)
3611 && really_exim && !list_options && !checking)
3614 uschar *p = big_buffer;
3616 (void)getcwd(CS p+4, big_buffer_size - 4);
3618 (void)string_format(p, big_buffer_size - (p - big_buffer), " %d args:", argc);
3620 for (i = 0; i < argc; i++)
3622 int len = Ustrlen(argv[i]);
3625 if (p + len + 8 >= big_buffer + big_buffer_size)
3628 log_write(0, LOG_MAIN, "%s", big_buffer);
3629 Ustrcpy(big_buffer, "...");
3632 printing = string_printing(argv[i]);
3633 if (printing[0] == 0) quote = US"\""; else
3635 uschar *pp = printing;
3637 while (*pp != 0) if (isspace(*pp++)) { quote = US"\""; break; }
3639 sprintf(CS p, " %s%.*s%s", quote, (int)(big_buffer_size -
3640 (p - big_buffer) - 4), printing, quote);
3644 if ((log_extra_selector & LX_arguments) != 0)
3645 log_write(0, LOG_MAIN, "%s", big_buffer);
3647 debug_printf("%s\n", big_buffer);
3650 /* Set the working directory to be the top-level spool directory. We don't rely
3651 on this in the code, which always uses fully qualified names, but it's useful
3652 for core dumps etc. Don't complain if it fails - the spool directory might not
3653 be generally accessible and calls with the -C option (and others) have lost
3654 privilege by now. Before the chdir, we try to ensure that the directory exists.
3657 if (Uchdir(spool_directory) != 0)
3659 (void)directory_make(spool_directory, US"", SPOOL_DIRECTORY_MODE, FALSE);
3660 (void)Uchdir(spool_directory);
3663 /* Handle calls with the -bi option. This is a sendmail option to rebuild *the*
3664 alias file. Exim doesn't have such a concept, but this call is screwed into
3665 Sun's YP makefiles. Handle this by calling a configured script, as the real
3666 user who called Exim. The -oA option can be used to pass an argument to the
3671 (void)fclose(config_file);
3672 if (bi_command != NULL)
3676 argv[i++] = bi_command;
3677 if (alias_arg != NULL) argv[i++] = alias_arg;
3680 setgroups(group_count, group_list);
3681 exim_setugid(real_uid, real_gid, FALSE, US"running bi_command");
3683 DEBUG(D_exec) debug_printf("exec %.256s %.256s\n", argv[0],
3684 (argv[1] == NULL)? US"" : argv[1]);
3686 execv(CS argv[0], (char *const *)argv);
3687 fprintf(stderr, "exim: exec failed: %s\n", strerror(errno));
3692 DEBUG(D_any) debug_printf("-bi used but bi_command not set; exiting\n");
3697 /* If an action on specific messages is requested, or if a daemon or queue
3698 runner is being started, we need to know if Exim was called by an admin user.
3699 This is the case if the real user is root or exim, or if the real group is
3700 exim, or if one of the supplementary groups is exim or a group listed in
3701 admin_groups. We don't fail all message actions immediately if not admin_user,
3702 since some actions can be performed by non-admin users. Instead, set admin_user
3703 for later interrogation. */
3705 if (real_uid == root_uid || real_uid == exim_uid || real_gid == exim_gid)
3710 for (i = 0; i < group_count; i++)
3712 if (group_list[i] == exim_gid) admin_user = TRUE;
3713 else if (admin_groups != NULL)
3715 for (j = 1; j <= (int)(admin_groups[0]); j++)
3716 if (admin_groups[j] == group_list[i])
3717 { admin_user = TRUE; break; }
3719 if (admin_user) break;
3723 /* Another group of privileged users are the trusted users. These are root,
3724 exim, and any caller matching trusted_users or trusted_groups. Trusted callers
3725 are permitted to specify sender_addresses with -f on the command line, and
3726 other message parameters as well. */
3728 if (real_uid == root_uid || real_uid == exim_uid)
3729 trusted_caller = TRUE;
3734 if (trusted_users != NULL)
3736 for (i = 1; i <= (int)(trusted_users[0]); i++)
3737 if (trusted_users[i] == real_uid)
3738 { trusted_caller = TRUE; break; }
3741 if (!trusted_caller && trusted_groups != NULL)
3743 for (i = 1; i <= (int)(trusted_groups[0]); i++)
3745 if (trusted_groups[i] == real_gid)
3746 trusted_caller = TRUE;
3747 else for (j = 0; j < group_count; j++)
3749 if (trusted_groups[i] == group_list[j])
3750 { trusted_caller = TRUE; break; }
3752 if (trusted_caller) break;
3757 if (trusted_caller) DEBUG(D_any) debug_printf("trusted user\n");
3758 if (admin_user) DEBUG(D_any) debug_printf("admin user\n");
3760 /* Only an admin user may start the daemon or force a queue run in the default
3761 configuration, but the queue run restriction can be relaxed. Only an admin
3762 user may request that a message be returned to its sender forthwith. Only an
3763 admin user may specify a debug level greater than D_v (because it might show
3764 passwords, etc. in lookup queries). Only an admin user may request a queue
3765 count. Only an admin user can use the test interface to scan for email
3766 (because Exim will be in the spool dir and able to look at mails). */
3770 BOOL debugset = (debug_selector & ~D_v) != 0;
3771 if (deliver_give_up || daemon_listen || malware_test_file ||
3772 (count_queue && queue_list_requires_admin) ||
3773 (list_queue && queue_list_requires_admin) ||
3774 (queue_interval >= 0 && prod_requires_admin) ||
3775 (debugset && !running_in_test_harness))
3777 fprintf(stderr, "exim:%s permission denied\n", debugset? " debugging" : "");
3782 /* If the real user is not root or the exim uid, the argument for passing
3783 in an open TCP/IP connection for another message is not permitted, nor is
3784 running with the -N option for any delivery action, unless this call to exim is
3785 one that supplied an input message, or we are using a patched exim for
3786 regression testing. */
3788 if (real_uid != root_uid && real_uid != exim_uid &&
3789 (continue_hostname != NULL ||
3791 (queue_interval >= 0 || daemon_listen || msg_action_arg > 0)
3792 )) && !running_in_test_harness)
3794 fprintf(stderr, "exim: Permission denied\n");
3795 return EXIT_FAILURE;
3798 /* If the caller is not trusted, certain arguments are ignored when running for
3799 real, but are permitted when checking things (-be, -bv, -bt, -bh, -bf, -bF).
3800 Note that authority for performing certain actions on messages is tested in the
3801 queue_action() function. */
3803 if (!trusted_caller && !checking && filter_test == FTEST_NONE)
3805 sender_host_name = sender_host_address = interface_address =
3806 sender_ident = received_protocol = NULL;
3807 sender_host_port = interface_port = 0;
3808 sender_host_authenticated = authenticated_sender = authenticated_id = NULL;
3811 /* If a sender host address is set, extract the optional port number off the
3812 end of it and check its syntax. Do the same thing for the interface address.
3813 Exim exits if the syntax is bad. */
3817 if (sender_host_address != NULL)
3818 sender_host_port = check_port(sender_host_address);
3819 if (interface_address != NULL)
3820 interface_port = check_port(interface_address);
3823 /* If an SMTP message is being received check to see if the standard input is a
3824 TCP/IP socket. If it is, we assume that Exim was called from inetd if the
3825 caller is root or the Exim user, or if the port is a privileged one. Otherwise,
3830 union sockaddr_46 inetd_sock;
3831 EXIM_SOCKLEN_T size = sizeof(inetd_sock);
3832 if (getpeername(0, (struct sockaddr *)(&inetd_sock), &size) == 0)
3834 int family = ((struct sockaddr *)(&inetd_sock))->sa_family;
3835 if (family == AF_INET || family == AF_INET6)
3837 union sockaddr_46 interface_sock;
3838 size = sizeof(interface_sock);
3840 if (getsockname(0, (struct sockaddr *)(&interface_sock), &size) == 0)
3841 interface_address = host_ntoa(-1, &interface_sock, NULL,
3844 if (host_is_tls_on_connect_port(interface_port)) tls_on_connect = TRUE;
3846 if (real_uid == root_uid || real_uid == exim_uid || interface_port < 1024)
3849 sender_host_address = host_ntoa(-1, (struct sockaddr *)(&inetd_sock),
3850 NULL, &sender_host_port);
3851 if (mua_wrapper) log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Input from "
3852 "inetd is not supported when mua_wrapper is set");
3857 "exim: Permission denied (unprivileged user, unprivileged port)\n");
3858 return EXIT_FAILURE;
3864 /* If the load average is going to be needed while receiving a message, get it
3865 now for those OS that require the first call to os_getloadavg() to be done as
3866 root. There will be further calls later for each message received. */
3868 #ifdef LOAD_AVG_NEEDS_ROOT
3869 if (receiving_message &&
3870 (queue_only_load >= 0 ||
3871 (is_inetd && smtp_load_reserve >= 0)
3874 load_average = OS_GETLOADAVG();
3878 /* The queue_only configuration option can be overridden by -odx on the command
3879 line, except that if queue_only_override is false, queue_only cannot be unset
3880 from the command line. */
3882 if (queue_only_set && (queue_only_override || arg_queue_only))
3883 queue_only = arg_queue_only;
3885 /* The receive_timeout and smtp_receive_timeout options can be overridden by
3888 if (arg_receive_timeout >= 0) receive_timeout = arg_receive_timeout;
3889 if (arg_smtp_receive_timeout >= 0)
3890 smtp_receive_timeout = arg_smtp_receive_timeout;
3892 /* If Exim was started with root privilege, unless we have already removed the
3893 root privilege above as a result of -C, -D, -be, -bf or -bF, remove it now
3894 except when starting the daemon or doing some kind of delivery or address
3895 testing (-bt). These are the only cases when root need to be retained. We run
3896 as exim for -bv and -bh. However, if deliver_drop_privilege is set, root is
3897 retained only for starting the daemon. We always do the initgroups() in this
3898 situation (controlled by the TRUE below), in order to be as close as possible
3899 to the state Exim usually runs in. */
3901 if (!unprivileged && /* originally had root AND */
3902 !removed_privilege && /* still got root AND */
3903 !daemon_listen && /* not starting the daemon */
3904 queue_interval <= 0 && /* (either kind of daemon) */
3906 deliver_drop_privilege || /* requested unprivileged */
3908 queue_interval < 0 && /* not running the queue */
3909 (msg_action_arg < 0 || /* and */
3910 msg_action != MSG_DELIVER) && /* not delivering and */
3911 (!checking || !address_test_mode) /* not address checking */
3915 exim_setugid(exim_uid, exim_gid, TRUE, US"privilege not needed");
3918 /* When we are retaining a privileged uid, we still change to the exim gid. */
3923 rv = setgid(exim_gid);
3924 /* Impact of failure is that some stuff might end up with an incorrect group.
3925 We track this for failures from root, since any attempt to change privilege
3926 by root should succeed and failures should be examined. For non-root,
3927 there's no security risk. For me, it's { exim -bV } on a just-built binary,
3928 no need to complain then. */
3931 if (!(unprivileged || removed_privilege))
3934 "exim: changing group failed: %s\n", strerror(errno));
3938 DEBUG(D_any) debug_printf("changing group to %ld failed: %s\n",
3939 (long int)exim_gid, strerror(errno));
3943 /* Handle a request to scan a file for malware */
3944 if (malware_test_file)
3946 #ifdef WITH_CONTENT_SCAN
3948 set_process_info("scanning file for malware");
3949 result = malware_in_file(malware_test_file);
3952 printf("No malware found.\n");
3957 printf("Malware lookup returned non-okay/fail: %d\n", result);
3961 printf("Malware found: %s\n", malware_name);
3963 printf("Malware scan detected malware of unknown name.\n");
3965 printf("Malware scanning not enabled at compile time.\n");
3970 /* Handle a request to list the delivery queue */
3974 set_process_info("listing the queue");
3975 queue_list(list_queue_option, argv + recipients_arg, argc - recipients_arg);
3979 /* Handle a request to count the delivery queue */
3983 set_process_info("counting the queue");
3988 /* Handle actions on specific messages, except for the force delivery and
3989 message load actions, which are done below. Some actions take a whole list of
3990 message ids, which are known to continue up to the end of the arguments. Others
3991 take a single message id and then operate on the recipients list. */
3993 if (msg_action_arg > 0 && msg_action != MSG_DELIVER && msg_action != MSG_LOAD)
3995 int yield = EXIT_SUCCESS;
3996 set_process_info("acting on specified messages");
3998 if (!one_msg_action)
4000 for (i = msg_action_arg; i < argc; i++)
4001 if (!queue_action(argv[i], msg_action, NULL, 0, 0))
4002 yield = EXIT_FAILURE;
4005 else if (!queue_action(argv[msg_action_arg], msg_action, argv, argc,
4006 recipients_arg)) yield = EXIT_FAILURE;
4010 /* All the modes below here require the remaining configuration sections
4011 to be read, except that we can skip over the ACL setting when delivering
4012 specific messages, or doing a queue run. (For various testing cases we could
4013 skip too, but as they are rare, it doesn't really matter.) The argument is TRUE
4016 readconf_rest(msg_action_arg > 0 || (queue_interval == 0 && !daemon_listen));
4018 /* The configuration data will have been read into POOL_PERM because we won't
4019 ever want to reset back past it. Change the current pool to POOL_MAIN. In fact,
4020 this is just a bit of pedantic tidiness. It wouldn't really matter if the
4021 configuration were read into POOL_MAIN, because we don't do any resets till
4022 later on. However, it seems right, and it does ensure that both pools get used.
4025 store_pool = POOL_MAIN;
4027 /* Handle the -brt option. This is for checking out retry configurations.
4028 The next three arguments are a domain name or a complete address, and
4029 optionally two error numbers. All it does is to call the function that
4030 scans the retry configuration data. */
4032 if (test_retry_arg >= 0)
4034 retry_config *yield;
4035 int basic_errno = 0;
4039 if (test_retry_arg >= argc)
4041 printf("-brt needs a domain or address argument\n");
4042 exim_exit(EXIT_FAILURE);
4044 s1 = argv[test_retry_arg++];
4047 /* If the first argument contains no @ and no . it might be a local user
4048 or it might be a single-component name. Treat as a domain. */
4050 if (Ustrchr(s1, '@') == NULL && Ustrchr(s1, '.') == NULL)
4052 printf("Warning: \"%s\" contains no '@' and no '.' characters. It is "
4053 "being \ntreated as a one-component domain, not as a local part.\n\n",
4057 /* There may be an optional second domain arg. */
4059 if (test_retry_arg < argc && Ustrchr(argv[test_retry_arg], '.') != NULL)
4060 s2 = argv[test_retry_arg++];
4062 /* The final arg is an error name */
4064 if (test_retry_arg < argc)
4066 uschar *ss = argv[test_retry_arg];
4068 readconf_retry_error(ss, ss + Ustrlen(ss), &basic_errno, &more_errno);
4071 printf("%s\n", CS error);
4072 return EXIT_FAILURE;
4075 /* For the {MAIL,RCPT,DATA}_4xx errors, a value of 255 means "any", and a
4076 code > 100 as an error is for matching codes to the decade. Turn them into
4077 a real error code, off the decade. */
4079 if (basic_errno == ERRNO_MAIL4XX ||
4080 basic_errno == ERRNO_RCPT4XX ||
4081 basic_errno == ERRNO_DATA4XX)
4083 int code = (more_errno >> 8) & 255;
4085 more_errno = (more_errno & 0xffff00ff) | (21 << 8);
4086 else if (code > 100)
4087 more_errno = (more_errno & 0xffff00ff) | ((code - 96) << 8);
4091 yield = retry_find_config(s1, s2, basic_errno, more_errno);
4092 if (yield == NULL) printf("No retry information found\n"); else
4095 more_errno = yield->more_errno;
4096 printf("Retry rule: %s ", yield->pattern);
4098 if (yield->basic_errno == ERRNO_EXIMQUOTA)
4100 printf("quota%s%s ",
4101 (more_errno > 0)? "_" : "",
4102 (more_errno > 0)? readconf_printtime(more_errno) : US"");
4104 else if (yield->basic_errno == ECONNREFUSED)
4106 printf("refused%s%s ",
4107 (more_errno > 0)? "_" : "",
4108 (more_errno == 'M')? "MX" :
4109 (more_errno == 'A')? "A" : "");
4111 else if (yield->basic_errno == ETIMEDOUT)
4114 if ((more_errno & RTEF_CTOUT) != 0) printf("_connect");
4116 if (more_errno != 0) printf("_%s",
4117 (more_errno == 'M')? "MX" : "A");
4120 else if (yield->basic_errno == ERRNO_AUTHFAIL)
4121 printf("auth_failed ");
4124 for (r = yield->rules; r != NULL; r = r->next)
4126 printf("%c,%s", r->rule, readconf_printtime(r->timeout)); /* Do not */
4127 printf(",%s", readconf_printtime(r->p1)); /* amalgamate */
4133 printf(",%d.", x/1000);
4147 exim_exit(EXIT_SUCCESS);
4150 /* Handle a request to list one or more configuration options */
4154 set_process_info("listing variables");
4155 if (recipients_arg >= argc) readconf_print(US"all", NULL);
4156 else for (i = recipients_arg; i < argc; i++)
4159 (Ustrcmp(argv[i], "router") == 0 ||
4160 Ustrcmp(argv[i], "transport") == 0 ||
4161 Ustrcmp(argv[i], "authenticator") == 0 ||
4162 Ustrcmp(argv[i], "macro") == 0))
4164 readconf_print(argv[i+1], argv[i]);
4167 else readconf_print(argv[i], NULL);
4169 exim_exit(EXIT_SUCCESS);
4173 /* Handle a request to deliver one or more messages that are already on the
4174 queue. Values of msg_action other than MSG_DELIVER and MSG_LOAD are dealt with
4175 above. MSG_LOAD is handled with -be (which is the only time it applies) below.
4177 Delivery of specific messages is typically used for a small number when
4178 prodding by hand (when the option forced_delivery will be set) or when
4179 re-execing to regain root privilege. Each message delivery must happen in a
4180 separate process, so we fork a process for each one, and run them sequentially
4181 so that debugging output doesn't get intertwined, and to avoid spawning too
4182 many processes if a long list is given. However, don't fork for the last one;
4183 this saves a process in the common case when Exim is called to deliver just one
4186 if (msg_action_arg > 0 && msg_action != MSG_LOAD)
4188 if (prod_requires_admin && !admin_user)
4190 fprintf(stderr, "exim: Permission denied\n");
4191 exim_exit(EXIT_FAILURE);
4193 set_process_info("delivering specified messages");
4194 if (deliver_give_up) forced_delivery = deliver_force_thaw = TRUE;
4195 for (i = msg_action_arg; i < argc; i++)
4200 (void)deliver_message(argv[i], forced_delivery, deliver_give_up);
4201 else if ((pid = fork()) == 0)
4203 (void)deliver_message(argv[i], forced_delivery, deliver_give_up);
4204 _exit(EXIT_SUCCESS);
4208 fprintf(stderr, "failed to fork delivery process for %s: %s\n", argv[i],
4210 exim_exit(EXIT_FAILURE);
4214 exim_exit(EXIT_SUCCESS);
4218 /* If only a single queue run is requested, without SMTP listening, we can just
4219 turn into a queue runner, with an optional starting message id. */
4221 if (queue_interval == 0 && !daemon_listen)
4223 DEBUG(D_queue_run) debug_printf("Single queue run%s%s%s%s\n",
4224 (start_queue_run_id == NULL)? US"" : US" starting at ",
4225 (start_queue_run_id == NULL)? US"" : start_queue_run_id,
4226 (stop_queue_run_id == NULL)? US"" : US" stopping at ",
4227 (stop_queue_run_id == NULL)? US"" : stop_queue_run_id);
4228 set_process_info("running the queue (single queue run)");
4229 queue_run(start_queue_run_id, stop_queue_run_id, FALSE);
4230 exim_exit(EXIT_SUCCESS);
4234 /* Find the login name of the real user running this process. This is always
4235 needed when receiving a message, because it is written into the spool file. It
4236 may also be used to construct a from: or a sender: header, and in this case we
4237 need the user's full name as well, so save a copy of it, checked for RFC822
4238 syntax and munged if necessary, if it hasn't previously been set by the -F
4239 argument. We may try to get the passwd entry more than once, in case NIS or
4240 other delays are in evidence. Save the home directory for use in filter testing
4245 if ((pw = getpwuid(real_uid)) != NULL)
4247 originator_login = string_copy(US pw->pw_name);
4248 originator_home = string_copy(US pw->pw_dir);
4250 /* If user name has not been set by -F, set it from the passwd entry
4251 unless -f has been used to set the sender address by a trusted user. */
4253 if (originator_name == NULL)
4255 if (sender_address == NULL ||
4256 (!trusted_caller && filter_test == FTEST_NONE))
4258 uschar *name = US pw->pw_gecos;
4259 uschar *amp = Ustrchr(name, '&');
4262 /* Most Unix specify that a '&' character in the gecos field is
4263 replaced by a copy of the login name, and some even specify that
4264 the first character should be upper cased, so that's what we do. */
4269 string_format(buffer, sizeof(buffer), "%.*s%n%s%s",
4270 amp - name, name, &loffset, originator_login, amp + 1);
4271 buffer[loffset] = toupper(buffer[loffset]);
4275 /* If a pattern for matching the gecos field was supplied, apply
4276 it and then expand the name string. */
4278 if (gecos_pattern != NULL && gecos_name != NULL)
4281 re = regex_must_compile(gecos_pattern, FALSE, TRUE); /* Use malloc */
4283 if (regex_match_and_setup(re, name, 0, -1))
4285 uschar *new_name = expand_string(gecos_name);
4287 if (new_name != NULL)
4289 DEBUG(D_receive) debug_printf("user name \"%s\" extracted from "
4290 "gecos field \"%s\"\n", new_name, name);
4293 else DEBUG(D_receive) debug_printf("failed to expand gecos_name string "
4294 "\"%s\": %s\n", gecos_name, expand_string_message);
4296 else DEBUG(D_receive) debug_printf("gecos_pattern \"%s\" did not match "
4297 "gecos field \"%s\"\n", gecos_pattern, name);
4298 store_free((void *)re);
4300 originator_name = string_copy(name);
4303 /* A trusted caller has used -f but not -F */
4305 else originator_name = US"";
4308 /* Break the retry loop */
4313 if (++i > finduser_retries) break;
4317 /* If we cannot get a user login, log the incident and give up, unless the
4318 configuration specifies something to use. When running in the test harness,
4319 any setting of unknown_login overrides the actual name. */
4321 if (originator_login == NULL || running_in_test_harness)
4323 if (unknown_login != NULL)
4325 originator_login = expand_string(unknown_login);
4326 if (originator_name == NULL && unknown_username != NULL)
4327 originator_name = expand_string(unknown_username);
4328 if (originator_name == NULL) originator_name = US"";
4330 if (originator_login == NULL)
4331 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Failed to get user name for uid %d",
4335 /* Ensure that the user name is in a suitable form for use as a "phrase" in an
4338 originator_name = string_copy(parse_fix_phrase(originator_name,
4339 Ustrlen(originator_name), big_buffer, big_buffer_size));
4341 /* If a message is created by this call of Exim, the uid/gid of its originator
4342 are those of the caller. These values are overridden if an existing message is
4343 read in from the spool. */
4345 originator_uid = real_uid;
4346 originator_gid = real_gid;
4348 DEBUG(D_receive) debug_printf("originator: uid=%d gid=%d login=%s name=%s\n",
4349 (int)originator_uid, (int)originator_gid, originator_login, originator_name);
4351 /* Run in daemon and/or queue-running mode. The function daemon_go() never
4352 returns. We leave this till here so that the originator_ fields are available
4353 for incoming messages via the daemon. The daemon cannot be run in mua_wrapper
4356 if (daemon_listen || queue_interval > 0)
4360 fprintf(stderr, "Daemon cannot be run when mua_wrapper is set\n");
4361 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Daemon cannot be run when "
4362 "mua_wrapper is set");
4367 /* If the sender ident has not been set (by a trusted caller) set it to
4368 the caller. This will get overwritten below for an inetd call. If a trusted
4369 caller has set it empty, unset it. */
4371 if (sender_ident == NULL) sender_ident = originator_login;
4372 else if (sender_ident[0] == 0) sender_ident = NULL;
4374 /* Handle the -brw option, which is for checking out rewriting rules. Cause log
4375 writes (on errors) to go to stderr instead. Can't do this earlier, as want the
4376 originator_* variables set. */
4378 if (test_rewrite_arg >= 0)
4380 really_exim = FALSE;
4381 if (test_rewrite_arg >= argc)
4383 printf("-brw needs an address argument\n");
4384 exim_exit(EXIT_FAILURE);
4386 rewrite_test(argv[test_rewrite_arg]);
4387 exim_exit(EXIT_SUCCESS);
4390 /* A locally-supplied message is considered to be coming from a local user
4391 unless a trusted caller supplies a sender address with -f, or is passing in the
4392 message via SMTP (inetd invocation or otherwise). */
4394 if ((sender_address == NULL && !smtp_input) ||
4395 (!trusted_caller && filter_test == FTEST_NONE))
4397 sender_local = TRUE;
4399 /* A trusted caller can supply authenticated_sender and authenticated_id
4400 via -oMas and -oMai and if so, they will already be set. Otherwise, force
4401 defaults except when host checking. */
4403 if (authenticated_sender == NULL && !host_checking)
4404 authenticated_sender = string_sprintf("%s@%s", originator_login,
4405 qualify_domain_sender);
4406 if (authenticated_id == NULL && !host_checking)
4407 authenticated_id = originator_login;
4410 /* Trusted callers are always permitted to specify the sender address.
4411 Untrusted callers may specify it if it matches untrusted_set_sender, or if what
4412 is specified is the empty address. However, if a trusted caller does not
4413 specify a sender address for SMTP input, we leave sender_address unset. This
4414 causes the MAIL commands to be honoured. */
4416 if ((!smtp_input && sender_address == NULL) ||
4417 !receive_check_set_sender(sender_address))
4419 /* Either the caller is not permitted to set a general sender, or this is
4420 non-SMTP input and the trusted caller has not set a sender. If there is no
4421 sender, or if a sender other than <> is set, override with the originator's
4422 login (which will get qualified below), except when checking things. */
4424 if (sender_address == NULL /* No sender_address set */
4426 (sender_address[0] != 0 && /* Non-empty sender address, AND */
4427 !checking && /* Not running tests, AND */
4428 filter_test == FTEST_NONE)) /* Not testing a filter */
4430 sender_address = originator_login;
4431 sender_address_forced = FALSE;
4432 sender_address_domain = 0;
4436 /* Remember whether an untrusted caller set the sender address */
4438 sender_set_untrusted = sender_address != originator_login && !trusted_caller;
4440 /* Ensure that the sender address is fully qualified unless it is the empty
4441 address, which indicates an error message, or doesn't exist (root caller, smtp
4442 interface, no -f argument). */
4444 if (sender_address != NULL && sender_address[0] != 0 &&
4445 sender_address_domain == 0)
4446 sender_address = string_sprintf("%s@%s", local_part_quote(sender_address),
4447 qualify_domain_sender);
4449 DEBUG(D_receive) debug_printf("sender address = %s\n", sender_address);
4451 /* Handle a request to verify a list of addresses, or test them for delivery.
4452 This must follow the setting of the sender address, since routers can be
4453 predicated upon the sender. If no arguments are given, read addresses from
4454 stdin. Set debug_level to at least D_v to get full output for address testing.
4457 if (verify_address_mode || address_test_mode)
4460 int flags = vopt_qualify;
4462 if (verify_address_mode)
4464 if (!verify_as_sender) flags |= vopt_is_recipient;
4465 DEBUG(D_verify) debug_print_ids(US"Verifying:");
4470 flags |= vopt_is_recipient;
4471 debug_selector |= D_v;
4472 debug_file = stderr;
4473 debug_fd = fileno(debug_file);
4474 DEBUG(D_verify) debug_print_ids(US"Address testing:");
4477 if (recipients_arg < argc)
4479 while (recipients_arg < argc)
4481 uschar *s = argv[recipients_arg++];
4484 BOOL finished = FALSE;
4485 uschar *ss = parse_find_address_end(s, FALSE);
4486 if (*ss == ',') *ss = 0; else finished = TRUE;
4487 test_address(s, flags, &exit_value);
4490 while (*(++s) != 0 && (*s == ',' || isspace(*s)));
4497 uschar *s = get_stdinput(NULL, NULL);
4498 if (s == NULL) break;
4499 test_address(s, flags, &exit_value);
4503 exim_exit(exit_value);
4506 /* Handle expansion checking. Either expand items on the command line, or read
4507 from stdin if there aren't any. If -Mset was specified, load the message so
4508 that its variables can be used, but restrict this facility to admin users.
4509 Otherwise, if -bem was used, read a message from stdin. */
4513 if (msg_action_arg > 0 && msg_action == MSG_LOAD)
4515 uschar spoolname[256]; /* Not big_buffer; used in spool_read_header() */
4518 fprintf(stderr, "exim: permission denied\n");
4521 message_id = argv[msg_action_arg];
4522 (void)string_format(spoolname, sizeof(spoolname), "%s-H", message_id);
4523 if (!spool_open_datafile(message_id))
4524 printf ("Failed to load message datafile %s\n", message_id);
4525 if (spool_read_header(spoolname, TRUE, FALSE) != spool_read_OK)
4526 printf ("Failed to load message %s\n", message_id);
4529 /* Read a test message from a file. We fudge it up to be on stdin, saving
4530 stdin itself for later reading of expansion strings. */
4532 else if (expansion_test_message != NULL)
4534 int save_stdin = dup(0);
4535 int fd = Uopen(expansion_test_message, O_RDONLY, 0);
4538 fprintf(stderr, "exim: failed to open %s: %s\n", expansion_test_message,
4540 return EXIT_FAILURE;
4543 filter_test = FTEST_USER; /* Fudge to make it look like filter test */
4544 message_ended = END_NOTENDED;
4545 read_message_body(receive_msg(extract_recipients));
4546 message_linecount += body_linecount;
4547 (void)dup2(save_stdin, 0);
4548 (void)close(save_stdin);
4549 clearerr(stdin); /* Required by Darwin */
4552 /* Allow $recipients for this testing */
4554 enable_dollar_recipients = TRUE;
4556 /* Expand command line items */
4558 if (recipients_arg < argc)
4560 while (recipients_arg < argc)
4562 uschar *s = argv[recipients_arg++];
4563 uschar *ss = expand_string(s);
4564 if (ss == NULL) printf ("Failed: %s\n", expand_string_message);
4565 else printf("%s\n", CS ss);
4573 char *(*fn_readline)(const char *) = NULL;
4574 void (*fn_addhist)(const char *) = NULL;
4577 void *dlhandle = set_readline(&fn_readline, &fn_addhist);
4583 uschar *source = get_stdinput(fn_readline, fn_addhist);
4584 if (source == NULL) break;
4585 ss = expand_string(source);
4587 printf ("Failed: %s\n", expand_string_message);
4588 else printf("%s\n", CS ss);
4592 if (dlhandle != NULL) dlclose(dlhandle);
4596 /* The data file will be open after -Mset */
4598 if (deliver_datafile >= 0)
4600 (void)close(deliver_datafile);
4601 deliver_datafile = -1;
4604 exim_exit(EXIT_SUCCESS);
4608 /* The active host name is normally the primary host name, but it can be varied
4609 for hosts that want to play several parts at once. We need to ensure that it is
4610 set for host checking, and for receiving messages. */
4612 smtp_active_hostname = primary_hostname;
4613 if (raw_active_hostname != NULL)
4615 uschar *nah = expand_string(raw_active_hostname);
4618 if (!expand_string_forcedfail)
4619 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to expand \"%s\" "
4620 "(smtp_active_hostname): %s", raw_active_hostname,
4621 expand_string_message);
4623 else if (nah[0] != 0) smtp_active_hostname = nah;
4626 /* Handle host checking: this facility mocks up an incoming SMTP call from a
4627 given IP address so that the blocking and relay configuration can be tested.
4628 Unless a sender_ident was set by -oMt, we discard it (the default is the
4629 caller's login name). An RFC 1413 call is made only if we are running in the
4630 test harness and an incoming interface and both ports are specified, because
4631 there is no TCP/IP call to find the ident for. */
4638 if (!sender_ident_set)
4640 sender_ident = NULL;
4641 if (running_in_test_harness && sender_host_port != 0 &&
4642 interface_address != NULL && interface_port != 0)
4643 verify_get_ident(1413);
4646 /* In case the given address is a non-canonical IPv6 address, canonicize
4647 it. The code works for both IPv4 and IPv6, as it happens. */
4649 size = host_aton(sender_host_address, x);
4650 sender_host_address = store_get(48); /* large enough for full IPv6 */
4651 (void)host_nmtoa(size, x, -1, sender_host_address, ':');
4653 /* Now set up for testing */
4655 host_build_sender_fullhost();
4659 sender_local = FALSE;
4660 sender_host_notsocket = TRUE;
4661 debug_file = stderr;
4662 debug_fd = fileno(debug_file);
4663 fprintf(stdout, "\n**** SMTP testing session as if from host %s\n"
4664 "**** but without any ident (RFC 1413) callback.\n"
4665 "**** This is not for real!\n\n",
4666 sender_host_address);
4668 if (verify_check_host(&hosts_connection_nolog) == OK)
4669 log_write_selector &= ~L_smtp_connection;
4670 log_write(L_smtp_connection, LOG_MAIN, "%s", smtp_get_connection_info());
4672 /* NOTE: We do *not* call smtp_log_no_mail() if smtp_start_session() fails,
4673 because a log line has already been written for all its failure exists
4674 (usually "connection refused: <reason>") and writing another one is
4675 unnecessary clutter. */
4677 if (smtp_start_session())
4679 reset_point = store_get(0);
4682 store_reset(reset_point);
4683 if (smtp_setup_msg() <= 0) break;
4684 if (!receive_msg(FALSE)) break;
4688 exim_exit(EXIT_SUCCESS);
4692 /* Arrange for message reception if recipients or SMTP were specified;
4693 otherwise complain unless a version print (-bV) happened or this is a filter
4694 verification test. In the former case, show the configuration file name. */
4696 if (recipients_arg >= argc && !extract_recipients && !smtp_input)
4698 if (version_printed)
4700 printf("Configuration file is %s\n", config_main_filename);
4701 return EXIT_SUCCESS;
4704 if (filter_test == FTEST_NONE)
4705 exim_usage(called_as);
4709 /* If mua_wrapper is set, Exim is being used to turn an MUA that submits on the
4710 standard input into an MUA that submits to a smarthost over TCP/IP. We know
4711 that we are not called from inetd, because that is rejected above. The
4712 following configuration settings are forced here:
4714 (1) Synchronous delivery (-odi)
4715 (2) Errors to stderr (-oep == -oeq)
4716 (3) No parallel remote delivery
4717 (4) Unprivileged delivery
4719 We don't force overall queueing options because there are several of them;
4720 instead, queueing is avoided below when mua_wrapper is set. However, we do need
4721 to override any SMTP queueing. */
4725 synchronous_delivery = TRUE;
4726 arg_error_handling = ERRORS_STDERR;
4727 remote_max_parallel = 1;
4728 deliver_drop_privilege = TRUE;
4730 queue_smtp_domains = NULL;
4734 /* Prepare to accept one or more new messages on the standard input. When a
4735 message has been read, its id is returned in message_id[]. If doing immediate
4736 delivery, we fork a delivery process for each received message, except for the
4737 last one, where we can save a process switch.
4739 It is only in non-smtp mode that error_handling is allowed to be changed from
4740 its default of ERRORS_SENDER by argument. (Idle thought: are any of the
4741 sendmail error modes other than -oem ever actually used? Later: yes.) */
4743 if (!smtp_input) error_handling = arg_error_handling;
4745 /* If this is an inetd call, ensure that stderr is closed to prevent panic
4746 logging being sent down the socket and make an identd call to get the
4751 (void)fclose(stderr);
4752 exim_nullstd(); /* Re-open to /dev/null */
4753 verify_get_ident(IDENT_PORT);
4754 host_build_sender_fullhost();
4755 set_process_info("handling incoming connection from %s via inetd",
4759 /* If the sender host address has been set, build sender_fullhost if it hasn't
4760 already been done (which it will have been for inetd). This caters for the
4761 case when it is forced by -oMa. However, we must flag that it isn't a socket,
4762 so that the test for IP options is skipped for -bs input. */
4764 if (sender_host_address != NULL && sender_fullhost == NULL)
4766 host_build_sender_fullhost();
4767 set_process_info("handling incoming connection from %s via -oMa",
4769 sender_host_notsocket = TRUE;
4772 /* Otherwise, set the sender host as unknown except for inetd calls. This
4773 prevents host checking in the case of -bs not from inetd and also for -bS. */
4775 else if (!is_inetd) sender_host_unknown = TRUE;
4777 /* If stdout does not exist, then dup stdin to stdout. This can happen
4778 if exim is started from inetd. In this case fd 0 will be set to the socket,
4779 but fd 1 will not be set. This also happens for passed SMTP channels. */
4781 if (fstat(1, &statbuf) < 0) (void)dup2(0, 1);
4783 /* Set up the incoming protocol name and the state of the program. Root is
4784 allowed to force received protocol via the -oMr option above. If we have come
4785 via inetd, the process info has already been set up. We don't set
4786 received_protocol here for smtp input, as it varies according to
4787 batch/HELO/EHLO/AUTH/TLS. */
4791 if (!is_inetd) set_process_info("accepting a local %sSMTP message from <%s>",
4792 smtp_batched_input? "batched " : "",
4793 (sender_address!= NULL)? sender_address : originator_login);
4797 if (received_protocol == NULL)
4798 received_protocol = string_sprintf("local%s", called_as);
4799 set_process_info("accepting a local non-SMTP message from <%s>",
4803 /* Initialize the session_local_queue-only flag (this will be ignored if
4804 mua_wrapper is set) */
4807 session_local_queue_only = queue_only;
4809 /* For non-SMTP and for batched SMTP input, check that there is enough space on
4810 the spool if so configured. On failure, we must not attempt to send an error
4811 message! (For interactive SMTP, the check happens at MAIL FROM and an SMTP
4812 error code is given.) */
4814 if ((!smtp_input || smtp_batched_input) && !receive_check_fs(0))
4816 fprintf(stderr, "exim: insufficient disk space\n");
4817 return EXIT_FAILURE;
4820 /* If this is smtp input of any kind, real or batched, handle the start of the
4823 NOTE: We do *not* call smtp_log_no_mail() if smtp_start_session() fails,
4824 because a log line has already been written for all its failure exists
4825 (usually "connection refused: <reason>") and writing another one is
4826 unnecessary clutter. */
4832 if (verify_check_host(&hosts_connection_nolog) == OK)
4833 log_write_selector &= ~L_smtp_connection;
4834 log_write(L_smtp_connection, LOG_MAIN, "%s", smtp_get_connection_info());
4835 if (!smtp_start_session())
4838 exim_exit(EXIT_SUCCESS);
4842 /* Otherwise, set up the input size limit here. */
4846 thismessage_size_limit = expand_string_integer(message_size_limit, TRUE);
4847 if (expand_string_message != NULL)
4849 if (thismessage_size_limit == -1)
4850 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to expand "
4851 "message_size_limit: %s", expand_string_message);
4853 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "invalid value for "
4854 "message_size_limit: %s", expand_string_message);
4858 /* Loop for several messages when reading SMTP input. If we fork any child
4859 processes, we don't want to wait for them unless synchronous delivery is
4860 requested, so set SIGCHLD to SIG_IGN in that case. This is not necessarily the
4861 same as SIG_DFL, despite the fact that documentation often lists the default as
4862 "ignore". This is a confusing area. This is what I know:
4864 At least on some systems (e.g. Solaris), just setting SIG_IGN causes child
4865 processes that complete simply to go away without ever becoming defunct. You
4866 can't then wait for them - but we don't want to wait for them in the
4867 non-synchronous delivery case. However, this behaviour of SIG_IGN doesn't
4868 happen for all OS (e.g. *BSD is different).
4870 But that's not the end of the story. Some (many? all?) systems have the
4871 SA_NOCLDWAIT option for sigaction(). This requests the behaviour that Solaris
4872 has by default, so it seems that the difference is merely one of default
4873 (compare restarting vs non-restarting signals).
4875 To cover all cases, Exim sets SIG_IGN with SA_NOCLDWAIT here if it can. If not,
4876 it just sets SIG_IGN. To be on the safe side it also calls waitpid() at the end
4877 of the loop below. Paranoia rules.
4879 February 2003: That's *still* not the end of the story. There are now versions
4880 of Linux (where SIG_IGN does work) that are picky. If, having set SIG_IGN, a
4881 process then calls waitpid(), a grumble is written to the system log, because
4882 this is logically inconsistent. In other words, it doesn't like the paranoia.
4883 As a consequenc of this, the waitpid() below is now excluded if we are sure
4884 that SIG_IGN works. */
4886 if (!synchronous_delivery)
4889 struct sigaction act;
4890 act.sa_handler = SIG_IGN;
4891 sigemptyset(&(act.sa_mask));
4892 act.sa_flags = SA_NOCLDWAIT;
4893 sigaction(SIGCHLD, &act, NULL);
4895 signal(SIGCHLD, SIG_IGN);
4899 /* Save the current store pool point, for resetting at the start of
4900 each message, and save the real sender address, if any. */
4902 reset_point = store_get(0);
4903 real_sender_address = sender_address;
4905 /* Loop to receive messages; receive_msg() returns TRUE if there are more
4906 messages to be read (SMTP input), or FALSE otherwise (not SMTP, or SMTP channel
4911 store_reset(reset_point);
4914 /* Handle the SMTP case; call smtp_setup_mst() to deal with the initial SMTP
4915 input and build the recipients list, before calling receive_msg() to read the
4916 message proper. Whatever sender address is given in the SMTP transaction is
4917 often ignored for local senders - we use the actual sender, which is normally
4918 either the underlying user running this process or a -f argument provided by
4919 a trusted caller. It is saved in real_sender_address. The test for whether to
4920 accept the SMTP sender is encapsulated in receive_check_set_sender(). */
4925 if ((rc = smtp_setup_msg()) > 0)
4927 if (real_sender_address != NULL &&
4928 !receive_check_set_sender(sender_address))
4930 sender_address = raw_sender = real_sender_address;
4931 sender_address_unrewritten = NULL;
4934 /* For batched SMTP, we have to run the acl_not_smtp_start ACL, since it
4935 isn't really SMTP, so no other ACL will run until the acl_not_smtp one at
4936 the very end. The result of the ACL is ignored (as for other non-SMTP
4937 messages). It is run for its potential side effects. */
4939 if (smtp_batched_input && acl_not_smtp_start != NULL)
4941 uschar *user_msg, *log_msg;
4942 enable_dollar_recipients = TRUE;
4943 (void)acl_check(ACL_WHERE_NOTSMTP_START, NULL, acl_not_smtp_start,
4944 &user_msg, &log_msg);
4945 enable_dollar_recipients = FALSE;
4948 /* Now get the data for the message */
4950 more = receive_msg(extract_recipients);
4951 if (message_id[0] == 0)
4954 smtp_log_no_mail(); /* Log no mail if configured */
4955 exim_exit(EXIT_FAILURE);
4960 smtp_log_no_mail(); /* Log no mail if configured */
4961 exim_exit((rc == 0)? EXIT_SUCCESS : EXIT_FAILURE);
4965 /* In the non-SMTP case, we have all the information from the command
4966 line, but must process it in case it is in the more general RFC822
4967 format, and in any case, to detect syntax errors. Also, it appears that
4968 the use of comma-separated lists as single arguments is common, so we
4969 had better support them. */
4975 int count = argc - recipients_arg;
4976 uschar **list = argv + recipients_arg;
4978 /* These options cannot be changed dynamically for non-SMTP messages */
4980 active_local_sender_retain = local_sender_retain;
4981 active_local_from_check = local_from_check;
4983 /* Save before any rewriting */
4985 raw_sender = string_copy(sender_address);
4987 /* Loop for each argument */
4989 for (i = 0; i < count; i++)
4991 int start, end, domain;
4993 uschar *s = list[i];
4995 /* Loop for each comma-separated address */
4999 BOOL finished = FALSE;
5001 uschar *ss = parse_find_address_end(s, FALSE);
5003 if (*ss == ',') *ss = 0; else finished = TRUE;
5005 /* Check max recipients - if -t was used, these aren't recipients */
5007 if (recipients_max > 0 && ++rcount > recipients_max &&
5008 !extract_recipients)
5010 if (error_handling == ERRORS_STDERR)
5012 fprintf(stderr, "exim: too many recipients\n");
5013 exim_exit(EXIT_FAILURE);
5018 moan_to_sender(ERRMESS_TOOMANYRECIP, NULL, NULL, stdin, TRUE)?
5019 errors_sender_rc : EXIT_FAILURE;
5024 parse_extract_address(s, &errmess, &start, &end, &domain, FALSE);
5026 if (domain == 0 && !allow_unqualified_recipient)
5029 errmess = US"unqualified recipient address not allowed";
5032 if (recipient == NULL)
5034 if (error_handling == ERRORS_STDERR)
5036 fprintf(stderr, "exim: bad recipient address \"%s\": %s\n",
5037 string_printing(list[i]), errmess);
5038 exim_exit(EXIT_FAILURE);
5044 eblock.text1 = string_printing(list[i]);
5045 eblock.text2 = errmess;
5047 moan_to_sender(ERRMESS_BADARGADDRESS, &eblock, NULL, stdin, TRUE)?
5048 errors_sender_rc : EXIT_FAILURE;
5052 receive_add_recipient(recipient, -1);
5055 while (*(++s) != 0 && (*s == ',' || isspace(*s)));
5059 /* Show the recipients when debugging */
5064 if (sender_address != NULL) debug_printf("Sender: %s\n", sender_address);
5065 if (recipients_list != NULL)
5067 debug_printf("Recipients:\n");
5068 for (i = 0; i < recipients_count; i++)
5069 debug_printf(" %s\n", recipients_list[i].address);
5073 /* Run the acl_not_smtp_start ACL if required. The result of the ACL is
5074 ignored; rejecting here would just add complication, and it can just as
5075 well be done later. Allow $recipients to be visible in the ACL. */
5077 if (acl_not_smtp_start != NULL)
5079 uschar *user_msg, *log_msg;
5080 enable_dollar_recipients = TRUE;
5081 (void)acl_check(ACL_WHERE_NOTSMTP_START, NULL, acl_not_smtp_start,
5082 &user_msg, &log_msg);
5083 enable_dollar_recipients = FALSE;
5086 /* Read the data for the message. If filter_test is not FTEST_NONE, this
5087 will just read the headers for the message, and not write anything onto the
5090 message_ended = END_NOTENDED;
5091 more = receive_msg(extract_recipients);
5093 /* more is always FALSE here (not SMTP message) when reading a message
5094 for real; when reading the headers of a message for filter testing,
5095 it is TRUE if the headers were terminated by '.' and FALSE otherwise. */
5097 if (message_id[0] == 0) exim_exit(EXIT_FAILURE);
5098 } /* Non-SMTP message reception */
5100 /* If this is a filter testing run, there are headers in store, but
5101 no message on the spool. Run the filtering code in testing mode, setting
5102 the domain to the qualify domain and the local part to the current user,
5103 unless they have been set by options. The prefix and suffix are left unset
5104 unless specified. The the return path is set to to the sender unless it has
5105 already been set from a return-path header in the message. */
5107 if (filter_test != FTEST_NONE)
5109 deliver_domain = (ftest_domain != NULL)?
5110 ftest_domain : qualify_domain_recipient;
5111 deliver_domain_orig = deliver_domain;
5112 deliver_localpart = (ftest_localpart != NULL)?
5113 ftest_localpart : originator_login;
5114 deliver_localpart_orig = deliver_localpart;
5115 deliver_localpart_prefix = ftest_prefix;
5116 deliver_localpart_suffix = ftest_suffix;
5117 deliver_home = originator_home;
5119 if (return_path == NULL)
5121 printf("Return-path copied from sender\n");
5122 return_path = string_copy(sender_address);
5126 printf("Return-path = %s\n", (return_path[0] == 0)? US"<>" : return_path);
5128 printf("Sender = %s\n", (sender_address[0] == 0)? US"<>" : sender_address);
5130 receive_add_recipient(
5131 string_sprintf("%s%s%s@%s",
5132 (ftest_prefix == NULL)? US"" : ftest_prefix,
5134 (ftest_suffix == NULL)? US"" : ftest_suffix,
5135 deliver_domain), -1);
5137 printf("Recipient = %s\n", recipients_list[0].address);
5138 if (ftest_prefix != NULL) printf("Prefix = %s\n", ftest_prefix);
5139 if (ftest_suffix != NULL) printf("Suffix = %s\n", ftest_suffix);
5141 (void)chdir("/"); /* Get away from wherever the user is running this from */
5143 /* Now we run either a system filter test, or a user filter test, or both.
5144 In the latter case, headers added by the system filter will persist and be
5145 available to the user filter. We need to copy the filter variables
5148 if ((filter_test & FTEST_SYSTEM) != 0)
5150 if (!filter_runtest(filter_sfd, filter_test_sfile, TRUE, more))
5151 exim_exit(EXIT_FAILURE);
5154 memcpy(filter_sn, filter_n, sizeof(filter_sn));
5156 if ((filter_test & FTEST_USER) != 0)
5158 if (!filter_runtest(filter_ufd, filter_test_ufile, FALSE, more))
5159 exim_exit(EXIT_FAILURE);
5162 exim_exit(EXIT_SUCCESS);
5165 /* Else act on the result of message reception. We should not get here unless
5166 message_id[0] is non-zero. If queue_only is set, session_local_queue_only
5167 will be TRUE. If it is not, check on the number of messages received in this
5170 if (!session_local_queue_only &&
5171 smtp_accept_queue_per_connection > 0 &&
5172 receive_messagecount > smtp_accept_queue_per_connection)
5174 session_local_queue_only = TRUE;
5175 queue_only_reason = 2;
5178 /* Initialize local_queue_only from session_local_queue_only. If it is false,
5179 and queue_only_load is set, check that the load average is below it. If it is
5180 not, set local_queue_only TRUE. If queue_only_load_latch is true (the
5181 default), we put the whole session into queue_only mode. It then remains this
5182 way for any subsequent messages on the same SMTP connection. This is a
5183 deliberate choice; even though the load average may fall, it doesn't seem
5184 right to deliver later messages on the same call when not delivering earlier
5185 ones. However, there are odd cases where this is not wanted, so this can be
5186 changed by setting queue_only_load_latch false. */
5188 local_queue_only = session_local_queue_only;
5189 if (!local_queue_only && queue_only_load >= 0)
5191 local_queue_only = (load_average = OS_GETLOADAVG()) > queue_only_load;
5192 if (local_queue_only)
5194 queue_only_reason = 3;
5195 if (queue_only_load_latch) session_local_queue_only = TRUE;
5199 /* If running as an MUA wrapper, all queueing options and freezing options
5203 local_queue_only = queue_only_policy = deliver_freeze = FALSE;
5205 /* Log the queueing here, when it will get a message id attached, but
5206 not if queue_only is set (case 0). Case 1 doesn't happen here (too many
5209 if (local_queue_only) switch(queue_only_reason)
5212 log_write(L_delay_delivery,
5213 LOG_MAIN, "no immediate delivery: more than %d messages "
5214 "received in one connection", smtp_accept_queue_per_connection);
5218 log_write(L_delay_delivery,
5219 LOG_MAIN, "no immediate delivery: load average %.2f",
5220 (double)load_average/1000.0);
5224 /* Else do the delivery unless the ACL or local_scan() called for queue only
5225 or froze the message. Always deliver in a separate process. A fork failure is
5226 not a disaster, as the delivery will eventually happen on a subsequent queue
5227 run. The search cache must be tidied before the fork, as the parent will
5228 do it before exiting. The child will trigger a lookup failure and
5229 thereby defer the delivery if it tries to use (for example) a cached ldap
5230 connection that the parent has called unbind on. */
5232 else if (!queue_only_policy && !deliver_freeze)
5237 if ((pid = fork()) == 0)
5240 close_unwanted(); /* Close unwanted file descriptors and TLS */
5241 exim_nullstd(); /* Ensure std{in,out,err} exist */
5243 /* Re-exec Exim if we need to regain privilege (note: in mua_wrapper
5244 mode, deliver_drop_privilege is forced TRUE). */
5246 if (geteuid() != root_uid && !deliver_drop_privilege && !unprivileged)
5248 (void)child_exec_exim(CEE_EXEC_EXIT, FALSE, NULL, FALSE, 2, US"-Mc",
5250 /* Control does not return here. */
5253 /* No need to re-exec */
5255 rc = deliver_message(message_id, FALSE, FALSE);
5257 _exit((!mua_wrapper || rc == DELIVER_MUA_SUCCEEDED)?
5258 EXIT_SUCCESS : EXIT_FAILURE);
5263 log_write(0, LOG_MAIN|LOG_PANIC, "failed to fork automatic delivery "
5264 "process: %s", strerror(errno));
5267 /* In the parent, wait if synchronous delivery is required. This will
5268 always be the case in MUA wrapper mode. */
5270 else if (synchronous_delivery)
5273 while (wait(&status) != pid);
5274 if ((status & 0x00ff) != 0)
5275 log_write(0, LOG_MAIN|LOG_PANIC,
5276 "process %d crashed with signal %d while delivering %s",
5277 (int)pid, status & 0x00ff, message_id);
5278 if (mua_wrapper && (status & 0xffff) != 0) exim_exit(EXIT_FAILURE);
5282 /* The loop will repeat if more is TRUE. If we do not know know that the OS
5283 automatically reaps children (see comments above the loop), clear away any
5284 finished subprocesses here, in case there are lots of messages coming in
5285 from the same source. */
5287 #ifndef SIG_IGN_WORKS
5288 while (waitpid(-1, NULL, WNOHANG) > 0);
5292 exim_exit(EXIT_SUCCESS); /* Never returns */
5293 return 0; /* To stop compiler warning */