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 overridden 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 /* If ref:name uses a number as the name, route_finduser() returns
1418 TRUE with exim_uid set and pw coerced to NULL. */
1420 exim_gid = pw->pw_gid;
1421 #ifndef EXIM_GROUPNAME
1425 "exim: ref:name should specify a usercode, not a group.\n"
1426 "exim: can't let you get away with it unless you also specify a group.\n");
1433 fprintf(stderr, "exim: failed to find uid for user name \"%s\"\n",
1439 #ifdef EXIM_GROUPNAME
1440 if (!route_findgroup(US EXIM_GROUPNAME, &exim_gid))
1442 fprintf(stderr, "exim: failed to find gid for group name \"%s\"\n",
1448 #ifdef CONFIGURE_OWNERNAME
1449 if (!route_finduser(US CONFIGURE_OWNERNAME, NULL, &config_uid))
1451 fprintf(stderr, "exim: failed to find uid for user name \"%s\"\n",
1452 CONFIGURE_OWNERNAME);
1457 /* We default the system_filter_user to be the Exim run-time user, as a
1458 sane non-root value. */
1459 system_filter_uid = exim_uid;
1461 #ifdef CONFIGURE_GROUPNAME
1462 if (!route_findgroup(US CONFIGURE_GROUPNAME, &config_gid))
1464 fprintf(stderr, "exim: failed to find gid for group name \"%s\"\n",
1465 CONFIGURE_GROUPNAME);
1470 /* In the Cygwin environment, some initialization needs doing. It is fudged
1471 in by means of this macro. */
1477 /* Check a field which is patched when we are running Exim within its
1478 testing harness; do a fast initial check, and then the whole thing. */
1480 running_in_test_harness =
1481 *running_status == '<' && Ustrcmp(running_status, "<<<testing>>>") == 0;
1483 /* The C standard says that the equivalent of setlocale(LC_ALL, "C") is obeyed
1484 at the start of a program; however, it seems that some environments do not
1485 follow this. A "strange" locale can affect the formatting of timestamps, so we
1488 setlocale(LC_ALL, "C");
1490 /* Set up the default handler for timing using alarm(). */
1492 os_non_restarting_signal(SIGALRM, sigalrm_handler);
1494 /* Ensure we have a buffer for constructing log entries. Use malloc directly,
1495 because store_malloc writes a log entry on failure. */
1497 log_buffer = (uschar *)malloc(LOG_BUFFER_SIZE);
1498 if (log_buffer == NULL)
1500 fprintf(stderr, "exim: failed to get store for log buffer\n");
1504 /* Set log_stderr to stderr, provided that stderr exists. This gets reset to
1505 NULL when the daemon is run and the file is closed. We have to use this
1506 indirection, because some systems don't allow writing to the variable "stderr".
1509 if (fstat(fileno(stderr), &statbuf) >= 0) log_stderr = stderr;
1511 /* Arrange for the PCRE regex library to use our store functions. Note that
1512 the normal calls are actually macros that add additional arguments for
1513 debugging purposes so we have to assign specially constructed functions here.
1514 The default is to use store in the stacking pool, but this is overridden in the
1515 regex_must_compile() function. */
1517 pcre_malloc = function_store_get;
1518 pcre_free = function_dummy_free;
1520 /* Ensure there is a big buffer for temporary use in several places. It is put
1521 in malloc store so that it can be freed for enlargement if necessary. */
1523 big_buffer = store_malloc(big_buffer_size);
1525 /* Set up the handler for the data request signal, and set the initial
1526 descriptive text. */
1528 set_process_info("initializing");
1529 os_restarting_signal(SIGUSR1, usr1_handler);
1531 /* SIGHUP is used to get the daemon to reconfigure. It gets set as appropriate
1532 in the daemon code. For the rest of Exim's uses, we ignore it. */
1534 signal(SIGHUP, SIG_IGN);
1536 /* We don't want to die on pipe errors as the code is written to handle
1537 the write error instead. */
1539 signal(SIGPIPE, SIG_IGN);
1541 /* Under some circumstance on some OS, Exim can get called with SIGCHLD
1542 set to SIG_IGN. This causes subprocesses that complete before the parent
1543 process waits for them not to hang around, so when Exim calls wait(), nothing
1544 is there. The wait() code has been made robust against this, but let's ensure
1545 that SIGCHLD is set to SIG_DFL, because it's tidier to wait and get a process
1546 ending status. We use sigaction rather than plain signal() on those OS where
1547 SA_NOCLDWAIT exists, because we want to be sure it is turned off. (There was a
1548 problem on AIX with this.) */
1552 struct sigaction act;
1553 act.sa_handler = SIG_DFL;
1554 sigemptyset(&(act.sa_mask));
1556 sigaction(SIGCHLD, &act, NULL);
1559 signal(SIGCHLD, SIG_DFL);
1562 /* Save the arguments for use if we re-exec exim as a daemon after receiving
1567 /* Set up the version number. Set up the leading 'E' for the external form of
1568 message ids, set the pointer to the internal form, and initialize it to
1569 indicate no message being processed. */
1572 message_id_option[0] = '-';
1573 message_id_external = message_id_option + 1;
1574 message_id_external[0] = 'E';
1575 message_id = message_id_external + 1;
1578 /* Set the umask to zero so that any files Exim creates using open() are
1579 created with the modes that it specifies. NOTE: Files created with fopen() have
1580 a problem, which was not recognized till rather late (February 2006). With this
1581 umask, such files will be world writeable. (They are all content scanning files
1582 in the spool directory, which isn't world-accessible, so this is not a
1583 disaster, but it's untidy.) I don't want to change this overall setting,
1584 however, because it will interact badly with the open() calls. Instead, there's
1585 now a function called modefopen() that fiddles with the umask while calling
1590 /* Precompile the regular expression for matching a message id. Keep this in
1591 step with the code that generates ids in the accept.c module. We need to do
1592 this here, because the -M options check their arguments for syntactic validity
1593 using mac_ismsgid, which uses this. */
1596 regex_must_compile(US"^(?:[^\\W_]{6}-){2}[^\\W_]{2}$", FALSE, TRUE);
1598 /* Precompile the regular expression that is used for matching an SMTP error
1599 code, possibly extended, at the start of an error message. Note that the
1600 terminating whitespace character is included. */
1603 regex_must_compile(US"^\\d\\d\\d\\s(?:\\d\\.\\d\\d?\\d?\\.\\d\\d?\\d?\\s)?",
1606 #ifdef WHITELIST_D_MACROS
1607 /* Precompile the regular expression used to filter the content of macros
1608 given to -D for permissibility. */
1610 regex_whitelisted_macro =
1611 regex_must_compile(US"^[A-Za-z0-9_/.-]*$", FALSE, TRUE);
1615 /* If the program is called as "mailq" treat it as equivalent to "exim -bp";
1616 this seems to be a generally accepted convention, since one finds symbolic
1617 links called "mailq" in standard OS configurations. */
1619 if ((namelen == 5 && Ustrcmp(argv[0], "mailq") == 0) ||
1620 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/mailq", 6) == 0))
1623 receiving_message = FALSE;
1624 called_as = US"-mailq";
1627 /* If the program is called as "rmail" treat it as equivalent to
1628 "exim -i -oee", thus allowing UUCP messages to be input using non-SMTP mode,
1629 i.e. preventing a single dot on a line from terminating the message, and
1630 returning with zero return code, even in cases of error (provided an error
1631 message has been sent). */
1633 if ((namelen == 5 && Ustrcmp(argv[0], "rmail") == 0) ||
1634 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/rmail", 6) == 0))
1637 called_as = US"-rmail";
1638 errors_sender_rc = EXIT_SUCCESS;
1641 /* If the program is called as "rsmtp" treat it as equivalent to "exim -bS";
1642 this is a smail convention. */
1644 if ((namelen == 5 && Ustrcmp(argv[0], "rsmtp") == 0) ||
1645 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/rsmtp", 6) == 0))
1647 smtp_input = smtp_batched_input = TRUE;
1648 called_as = US"-rsmtp";
1651 /* If the program is called as "runq" treat it as equivalent to "exim -q";
1652 this is a smail convention. */
1654 if ((namelen == 4 && Ustrcmp(argv[0], "runq") == 0) ||
1655 (namelen > 4 && Ustrncmp(argv[0] + namelen - 5, "/runq", 5) == 0))
1658 receiving_message = FALSE;
1659 called_as = US"-runq";
1662 /* If the program is called as "newaliases" treat it as equivalent to
1663 "exim -bi"; this is a sendmail convention. */
1665 if ((namelen == 10 && Ustrcmp(argv[0], "newaliases") == 0) ||
1666 (namelen > 10 && Ustrncmp(argv[0] + namelen - 11, "/newaliases", 11) == 0))
1669 receiving_message = FALSE;
1670 called_as = US"-newaliases";
1673 /* Save the original effective uid for a couple of uses later. It should
1674 normally be root, but in some esoteric environments it may not be. */
1676 original_euid = geteuid();
1678 /* Get the real uid and gid. If the caller is root, force the effective uid/gid
1679 to be the same as the real ones. This makes a difference only if Exim is setuid
1680 (or setgid) to something other than root, which could be the case in some
1681 special configurations. */
1683 real_uid = getuid();
1684 real_gid = getgid();
1686 if (real_uid == root_uid)
1688 rv = setgid(real_gid);
1691 fprintf(stderr, "exim: setgid(%ld) failed: %s\n",
1692 (long int)real_gid, strerror(errno));
1695 rv = setuid(real_uid);
1698 fprintf(stderr, "exim: setuid(%ld) failed: %s\n",
1699 (long int)real_uid, strerror(errno));
1704 /* If neither the original real uid nor the original euid was root, Exim is
1705 running in an unprivileged state. */
1707 unprivileged = (real_uid != root_uid && original_euid != root_uid);
1709 /* Scan the program's arguments. Some can be dealt with right away; others are
1710 simply recorded for checking and handling afterwards. Do a high-level switch
1711 on the second character (the one after '-'), to save some effort. */
1713 for (i = 1; i < argc; i++)
1715 BOOL badarg = FALSE;
1716 uschar *arg = argv[i];
1720 /* An argument not starting with '-' is the start of a recipients list;
1721 break out of the options-scanning loop. */
1729 /* An option consistion of -- terminates the options */
1731 if (Ustrcmp(arg, "--") == 0)
1733 recipients_arg = i + 1;
1737 /* Handle flagged options */
1739 switchchar = arg[1];
1742 /* Make all -ex options synonymous with -oex arguments, since that
1743 is assumed by various callers. Also make -qR options synonymous with -R
1744 options, as that seems to be required as well. Allow for -qqR too, and
1745 the same for -S options. */
1747 if (Ustrncmp(arg+1, "oe", 2) == 0 ||
1748 Ustrncmp(arg+1, "qR", 2) == 0 ||
1749 Ustrncmp(arg+1, "qS", 2) == 0)
1751 switchchar = arg[2];
1754 else if (Ustrncmp(arg+1, "qqR", 3) == 0 || Ustrncmp(arg+1, "qqS", 3) == 0)
1756 switchchar = arg[3];
1758 queue_2stage = TRUE;
1761 /* Make -r synonymous with -f, since it is a documented alias */
1763 else if (arg[1] == 'r') switchchar = 'f';
1765 /* Make -ov synonymous with -v */
1767 else if (Ustrcmp(arg, "-ov") == 0)
1773 /* deal with --option_aliases */
1774 else if (switchchar == '-')
1776 if (Ustrcmp(argrest, "help") == 0)
1778 usage_wanted = TRUE;
1781 else if (Ustrcmp(argrest, "version") == 0)
1788 /* High-level switch on active initial letter */
1792 /* -Btype is a sendmail option for 7bit/8bit setting. Exim is 8-bit clean
1793 so has no need of it. */
1796 if (*argrest == 0) i++; /* Skip over the type */
1801 receiving_message = FALSE; /* Reset TRUE for -bm, -bS, -bs below */
1803 /* -bd: Run in daemon mode, awaiting SMTP connections.
1804 -bdf: Ditto, but in the foreground.
1807 if (*argrest == 'd')
1809 daemon_listen = TRUE;
1810 if (*(++argrest) == 'f') background_daemon = FALSE;
1811 else if (*argrest != 0) { badarg = TRUE; break; }
1814 /* -be: Run in expansion test mode
1815 -bem: Ditto, but read a message from a file first
1818 else if (*argrest == 'e')
1820 expansion_test = checking = TRUE;
1821 if (argrest[1] == 'm')
1823 if (++i >= argc) { badarg = TRUE; break; }
1824 expansion_test_message = argv[i];
1827 if (argrest[1] != 0) { badarg = TRUE; break; }
1830 /* -bF: Run system filter test */
1832 else if (*argrest == 'F')
1834 filter_test |= FTEST_SYSTEM;
1835 if (*(++argrest) != 0) { badarg = TRUE; break; }
1836 if (++i < argc) filter_test_sfile = argv[i]; else
1838 fprintf(stderr, "exim: file name expected after %s\n", argv[i-1]);
1843 /* -bf: Run user filter test
1844 -bfd: Set domain for filter testing
1845 -bfl: Set local part for filter testing
1846 -bfp: Set prefix for filter testing
1847 -bfs: Set suffix for filter testing
1850 else if (*argrest == 'f')
1852 if (*(++argrest) == 0)
1854 filter_test |= FTEST_USER;
1855 if (++i < argc) filter_test_ufile = argv[i]; else
1857 fprintf(stderr, "exim: file name expected after %s\n", argv[i-1]);
1865 fprintf(stderr, "exim: string expected after %s\n", arg);
1868 if (Ustrcmp(argrest, "d") == 0) ftest_domain = argv[i];
1869 else if (Ustrcmp(argrest, "l") == 0) ftest_localpart = argv[i];
1870 else if (Ustrcmp(argrest, "p") == 0) ftest_prefix = argv[i];
1871 else if (Ustrcmp(argrest, "s") == 0) ftest_suffix = argv[i];
1872 else { badarg = TRUE; break; }
1876 /* -bh: Host checking - an IP address must follow. */
1878 else if (Ustrcmp(argrest, "h") == 0 || Ustrcmp(argrest, "hc") == 0)
1880 if (++i >= argc) { badarg = TRUE; break; }
1881 sender_host_address = argv[i];
1882 host_checking = checking = log_testing_mode = TRUE;
1883 host_checking_callout = argrest[1] == 'c';
1886 /* -bi: This option is used by sendmail to initialize *the* alias file,
1887 though it has the -oA option to specify a different file. Exim has no
1888 concept of *the* alias file, but since Sun's YP make script calls
1889 sendmail this way, some support must be provided. */
1891 else if (Ustrcmp(argrest, "i") == 0) bi_option = TRUE;
1893 /* -bm: Accept and deliver message - the default option. Reinstate
1894 receiving_message, which got turned off for all -b options. */
1896 else if (Ustrcmp(argrest, "m") == 0) receiving_message = TRUE;
1898 /* -bmalware: test the filename given for malware */
1900 else if (Ustrcmp(argrest, "malware") == 0)
1902 if (++i >= argc) { badarg = TRUE; break; }
1903 malware_test_file = argv[i];
1906 /* -bnq: For locally originating messages, do not qualify unqualified
1907 addresses. In the envelope, this causes errors; in header lines they
1910 else if (Ustrcmp(argrest, "nq") == 0)
1912 allow_unqualified_sender = FALSE;
1913 allow_unqualified_recipient = FALSE;
1916 /* -bpxx: List the contents of the mail queue, in various forms. If
1917 the option is -bpc, just a queue count is needed. Otherwise, if the
1918 first letter after p is r, then order is random. */
1920 else if (*argrest == 'p')
1922 if (*(++argrest) == 'c')
1925 if (*(++argrest) != 0) badarg = TRUE;
1929 if (*argrest == 'r')
1931 list_queue_option = 8;
1934 else list_queue_option = 0;
1938 /* -bp: List the contents of the mail queue, top-level only */
1940 if (*argrest == 0) {}
1942 /* -bpu: List the contents of the mail queue, top-level undelivered */
1944 else if (Ustrcmp(argrest, "u") == 0) list_queue_option += 1;
1946 /* -bpa: List the contents of the mail queue, including all delivered */
1948 else if (Ustrcmp(argrest, "a") == 0) list_queue_option += 2;
1950 /* Unknown after -bp[r] */
1960 /* -bP: List the configuration variables given as the address list.
1961 Force -v, so configuration errors get displayed. */
1963 else if (Ustrcmp(argrest, "P") == 0)
1965 list_options = TRUE;
1966 debug_selector |= D_v;
1967 debug_file = stderr;
1970 /* -brt: Test retry configuration lookup */
1972 else if (Ustrcmp(argrest, "rt") == 0)
1974 test_retry_arg = i + 1;
1978 /* -brw: Test rewrite configuration */
1980 else if (Ustrcmp(argrest, "rw") == 0)
1982 test_rewrite_arg = i + 1;
1986 /* -bS: Read SMTP commands on standard input, but produce no replies -
1987 all errors are reported by sending messages. */
1989 else if (Ustrcmp(argrest, "S") == 0)
1990 smtp_input = smtp_batched_input = receiving_message = TRUE;
1992 /* -bs: Read SMTP commands on standard input and produce SMTP replies
1993 on standard output. */
1995 else if (Ustrcmp(argrest, "s") == 0) smtp_input = receiving_message = TRUE;
1997 /* -bt: address testing mode */
1999 else if (Ustrcmp(argrest, "t") == 0)
2000 address_test_mode = checking = log_testing_mode = TRUE;
2002 /* -bv: verify addresses */
2004 else if (Ustrcmp(argrest, "v") == 0)
2005 verify_address_mode = checking = log_testing_mode = TRUE;
2007 /* -bvs: verify sender addresses */
2009 else if (Ustrcmp(argrest, "vs") == 0)
2011 verify_address_mode = checking = log_testing_mode = TRUE;
2012 verify_as_sender = TRUE;
2015 /* -bV: Print version string and support details */
2017 else if (Ustrcmp(argrest, "V") == 0)
2019 printf("Exim version %s #%s built %s\n", version_string,
2020 version_cnumber, version_date);
2021 printf("%s\n", CS version_copyright);
2022 version_printed = TRUE;
2023 show_whats_supported(stdout);
2030 /* -C: change configuration file list; ignore if it isn't really
2031 a change! Enforce a prefix check if required. */
2036 if(++i < argc) argrest = argv[i]; else
2037 { badarg = TRUE; break; }
2039 if (Ustrcmp(config_main_filelist, argrest) != 0)
2041 #ifdef ALT_CONFIG_PREFIX
2043 int len = Ustrlen(ALT_CONFIG_PREFIX);
2044 uschar *list = argrest;
2046 while((filename = string_nextinlist(&list, &sep, big_buffer,
2047 big_buffer_size)) != NULL)
2049 if ((Ustrlen(filename) < len ||
2050 Ustrncmp(filename, ALT_CONFIG_PREFIX, len) != 0 ||
2051 Ustrstr(filename, "/../") != NULL) &&
2052 (Ustrcmp(filename, "/dev/null") != 0 || real_uid != root_uid))
2054 fprintf(stderr, "-C Permission denied\n");
2059 if (real_uid != root_uid)
2061 #ifdef TRUSTED_CONFIG_LIST
2063 if (real_uid != exim_uid
2064 #ifdef CONFIGURE_OWNER
2065 && real_uid != config_uid
2068 trusted_config = FALSE;
2071 FILE *trust_list = Ufopen(TRUSTED_CONFIG_LIST, "rb");
2074 struct stat statbuf;
2076 if (fstat(fileno(trust_list), &statbuf) != 0 ||
2077 (statbuf.st_uid != root_uid /* owner not root */
2078 #ifdef CONFIGURE_OWNER
2079 && statbuf.st_uid != config_uid /* owner not the special one */
2082 (statbuf.st_gid != root_gid /* group not root */
2083 #ifdef CONFIGURE_GROUP
2084 && statbuf.st_gid != config_gid /* group not the special one */
2086 && (statbuf.st_mode & 020) != 0 /* group writeable */
2088 (statbuf.st_mode & 2) != 0) /* world writeable */
2090 trusted_config = FALSE;
2095 /* Well, the trust list at least is up to scratch... */
2096 void *reset_point = store_get(0);
2097 uschar *trusted_configs[32];
2101 while (Ufgets(big_buffer, big_buffer_size, trust_list))
2103 uschar *start = big_buffer, *nl;
2104 while (*start && isspace(*start))
2108 nl = Ustrchr(start, '\n');
2111 trusted_configs[nr_configs++] = string_copy(start);
2112 if (nr_configs == 32)
2120 uschar *list = argrest;
2122 while (trusted_config && (filename = string_nextinlist(&list,
2123 &sep, big_buffer, big_buffer_size)) != NULL)
2125 for (i=0; i < nr_configs; i++)
2127 if (Ustrcmp(filename, trusted_configs[i]) == 0)
2130 if (i == nr_configs)
2132 trusted_config = FALSE;
2136 store_reset(reset_point);
2140 /* No valid prefixes found in trust_list file. */
2141 trusted_config = FALSE;
2147 /* Could not open trust_list file. */
2148 trusted_config = FALSE;
2152 /* Not root; don't trust config */
2153 trusted_config = FALSE;
2157 config_main_filelist = argrest;
2158 config_changed = TRUE;
2163 /* -D: set up a macro definition */
2166 #ifdef DISABLE_D_OPTION
2167 fprintf(stderr, "exim: -D is not available in this Exim binary\n");
2172 macro_item *mlast = NULL;
2175 uschar *s = argrest;
2177 while (isspace(*s)) s++;
2179 if (*s < 'A' || *s > 'Z')
2181 fprintf(stderr, "exim: macro name set by -D must start with "
2182 "an upper case letter\n");
2186 while (isalnum(*s) || *s == '_')
2188 if (ptr < sizeof(name)-1) name[ptr++] = *s;
2192 if (ptr == 0) { badarg = TRUE; break; }
2193 while (isspace(*s)) s++;
2196 if (*s++ != '=') { badarg = TRUE; break; }
2197 while (isspace(*s)) s++;
2200 for (m = macros; m != NULL; m = m->next)
2202 if (Ustrcmp(m->name, name) == 0)
2204 fprintf(stderr, "exim: duplicated -D in command line\n");
2210 m = store_get(sizeof(macro_item) + Ustrlen(name));
2212 m->command_line = TRUE;
2213 if (mlast == NULL) macros = m; else mlast->next = m;
2214 Ustrcpy(m->name, name);
2215 m->replacement = string_copy(s);
2217 if (clmacro_count >= MAX_CLMACROS)
2219 fprintf(stderr, "exim: too many -D options on command line\n");
2222 clmacros[clmacro_count++] = string_sprintf("-D%s=%s", m->name,
2228 /* -d: Set debug level (see also -v below) or set the drop_cr option.
2229 The latter is now a no-op, retained for compatibility only. If -dd is used,
2230 debugging subprocesses of the daemon is disabled. */
2233 if (Ustrcmp(argrest, "ropcr") == 0)
2235 /* drop_cr = TRUE; */
2238 /* Use an intermediate variable so that we don't set debugging while
2239 decoding the debugging bits. */
2243 unsigned int selector = D_default;
2246 if (*argrest == 'd')
2248 debug_daemon = TRUE;
2252 decode_bits(&selector, NULL, D_memory, 0, argrest, debug_options,
2253 debug_options_count, US"debug", 0);
2254 debug_selector = selector;
2259 /* -E: This is a local error message. This option is not intended for
2260 external use at all, but is not restricted to trusted callers because it
2261 does no harm (just suppresses certain error messages) and if Exim is run
2262 not setuid root it won't always be trusted when it generates error
2263 messages using this option. If there is a message id following -E, point
2264 message_reference at it, for logging. */
2267 local_error_message = TRUE;
2268 if (mac_ismsgid(argrest)) message_reference = argrest;
2272 /* -ex: The vacation program calls sendmail with the undocumented "-eq"
2273 option, so it looks as if historically the -oex options are also callable
2274 without the leading -o. So we have to accept them. Before the switch,
2275 anything starting -oe has been converted to -e. Exim does not support all
2276 of the sendmail error options. */
2279 if (Ustrcmp(argrest, "e") == 0)
2281 arg_error_handling = ERRORS_SENDER;
2282 errors_sender_rc = EXIT_SUCCESS;
2284 else if (Ustrcmp(argrest, "m") == 0) arg_error_handling = ERRORS_SENDER;
2285 else if (Ustrcmp(argrest, "p") == 0) arg_error_handling = ERRORS_STDERR;
2286 else if (Ustrcmp(argrest, "q") == 0) arg_error_handling = ERRORS_STDERR;
2287 else if (Ustrcmp(argrest, "w") == 0) arg_error_handling = ERRORS_SENDER;
2292 /* -F: Set sender's full name, used instead of the gecos entry from
2293 the password file. Since users can usually alter their gecos entries,
2294 there's no security involved in using this instead. The data can follow
2295 the -F or be in the next argument. */
2300 if(++i < argc) argrest = argv[i]; else
2301 { badarg = TRUE; break; }
2303 originator_name = argrest;
2304 sender_name_forced = TRUE;
2308 /* -f: Set sender's address - this value is only actually used if Exim is
2309 run by a trusted user, or if untrusted_set_sender is set and matches the
2310 address, except that the null address can always be set by any user. The
2311 test for this happens later, when the value given here is ignored when not
2312 permitted. For an untrusted user, the actual sender is still put in Sender:
2313 if it doesn't match the From: header (unless no_local_from_check is set).
2314 The data can follow the -f or be in the next argument. The -r switch is an
2315 obsolete form of -f but since there appear to be programs out there that
2316 use anything that sendmail has ever supported, better accept it - the
2317 synonymizing is done before the switch above.
2319 At this stage, we must allow domain literal addresses, because we don't
2320 know what the setting of allow_domain_literals is yet. Ditto for trailing
2321 dots and strip_trailing_dot. */
2329 if (i+1 < argc) argrest = argv[++i]; else
2330 { badarg = TRUE; break; }
2334 sender_address = string_sprintf(""); /* Ensure writeable memory */
2338 uschar *temp = argrest + Ustrlen(argrest) - 1;
2339 while (temp >= argrest && isspace(*temp)) temp--;
2340 if (temp >= argrest && *temp == '.') f_end_dot = TRUE;
2341 allow_domain_literals = TRUE;
2342 strip_trailing_dot = TRUE;
2343 sender_address = parse_extract_address(argrest, &errmess, &start, &end,
2344 &sender_address_domain, TRUE);
2345 allow_domain_literals = FALSE;
2346 strip_trailing_dot = FALSE;
2347 if (sender_address == NULL)
2349 fprintf(stderr, "exim: bad -f address \"%s\": %s\n", argrest, errmess);
2350 return EXIT_FAILURE;
2353 sender_address_forced = TRUE;
2357 /* This is some Sendmail thing which can be ignored */
2362 /* -h: Set the hop count for an incoming message. Exim does not currently
2363 support this; it always computes it by counting the Received: headers.
2364 To put it in will require a change to the spool header file format. */
2369 if(++i < argc) argrest = argv[i]; else
2370 { badarg = TRUE; break; }
2372 if (!isdigit(*argrest)) badarg = TRUE;
2376 /* -i: Set flag so dot doesn't end non-SMTP input (same as -oi, seems
2377 not to be documented for sendmail but mailx (at least) uses it) */
2380 if (*argrest == 0) dot_ends = FALSE; else badarg = TRUE;
2385 receiving_message = FALSE;
2387 /* -MC: continue delivery of another message via an existing open
2388 file descriptor. This option is used for an internal call by the
2389 smtp transport when there is a pending message waiting to go to an
2390 address to which it has got a connection. Five subsequent arguments are
2391 required: transport name, host name, IP address, sequence number, and
2392 message_id. Transports may decline to create new processes if the sequence
2393 number gets too big. The channel is stdin. This (-MC) must be the last
2394 argument. There's a subsequent check that the real-uid is privileged.
2396 If we are running in the test harness. delay for a bit, to let the process
2397 that set this one up complete. This makes for repeatability of the logging,
2400 if (Ustrcmp(argrest, "C") == 0)
2402 union sockaddr_46 interface_sock;
2403 EXIM_SOCKLEN_T size = sizeof(interface_sock);
2407 fprintf(stderr, "exim: too many or too few arguments after -MC\n");
2408 return EXIT_FAILURE;
2411 if (msg_action_arg >= 0)
2413 fprintf(stderr, "exim: incompatible arguments\n");
2414 return EXIT_FAILURE;
2417 continue_transport = argv[++i];
2418 continue_hostname = argv[++i];
2419 continue_host_address = argv[++i];
2420 continue_sequence = Uatoi(argv[++i]);
2421 msg_action = MSG_DELIVER;
2422 msg_action_arg = ++i;
2423 forced_delivery = TRUE;
2424 queue_run_pid = passed_qr_pid;
2425 queue_run_pipe = passed_qr_pipe;
2427 if (!mac_ismsgid(argv[i]))
2429 fprintf(stderr, "exim: malformed message id %s after -MC option\n",
2431 return EXIT_FAILURE;
2434 /* Set up $sending_ip_address and $sending_port */
2436 if (getsockname(fileno(stdin), (struct sockaddr *)(&interface_sock),
2438 sending_ip_address = host_ntoa(-1, &interface_sock, NULL,
2442 fprintf(stderr, "exim: getsockname() failed after -MC option: %s\n",
2444 return EXIT_FAILURE;
2447 if (running_in_test_harness) millisleep(500);
2451 /* -MCA: set the smtp_authenticated flag; this is useful only when it
2452 precedes -MC (see above). The flag indicates that the host to which
2453 Exim is connected has accepted an AUTH sequence. */
2455 else if (Ustrcmp(argrest, "CA") == 0)
2457 smtp_authenticated = TRUE;
2461 /* -MCP: set the smtp_use_pipelining flag; this is useful only when
2462 it preceded -MC (see above) */
2464 else if (Ustrcmp(argrest, "CP") == 0)
2466 smtp_use_pipelining = TRUE;
2470 /* -MCQ: pass on the pid of the queue-running process that started
2471 this chain of deliveries and the fd of its synchronizing pipe; this
2472 is useful only when it precedes -MC (see above) */
2474 else if (Ustrcmp(argrest, "CQ") == 0)
2476 if(++i < argc) passed_qr_pid = (pid_t)(Uatol(argv[i]));
2478 if(++i < argc) passed_qr_pipe = (int)(Uatol(argv[i]));
2483 /* -MCS: set the smtp_use_size flag; this is useful only when it
2484 precedes -MC (see above) */
2486 else if (Ustrcmp(argrest, "CS") == 0)
2488 smtp_use_size = TRUE;
2492 /* -MCT: set the tls_offered flag; this is useful only when it
2493 precedes -MC (see above). The flag indicates that the host to which
2494 Exim is connected has offered TLS support. */
2497 else if (Ustrcmp(argrest, "CT") == 0)
2504 /* -M[x]: various operations on the following list of message ids:
2505 -M deliver the messages, ignoring next retry times and thawing
2506 -Mc deliver the messages, checking next retry times, no thawing
2507 -Mf freeze the messages
2508 -Mg give up on the messages
2509 -Mt thaw the messages
2510 -Mrm remove the messages
2511 In the above cases, this must be the last option. There are also the
2512 following options which are followed by a single message id, and which
2513 act on that message. Some of them use the "recipient" addresses as well.
2514 -Mar add recipient(s)
2515 -Mmad mark all recipients delivered
2516 -Mmd mark recipients(s) delivered
2518 -Mset load a message for use with -be
2520 -Mvc show copy (of whole message, in RFC 2822 format)
2525 else if (*argrest == 0)
2527 msg_action = MSG_DELIVER;
2528 forced_delivery = deliver_force_thaw = TRUE;
2530 else if (Ustrcmp(argrest, "ar") == 0)
2532 msg_action = MSG_ADD_RECIPIENT;
2533 one_msg_action = TRUE;
2535 else if (Ustrcmp(argrest, "c") == 0) msg_action = MSG_DELIVER;
2536 else if (Ustrcmp(argrest, "es") == 0)
2538 msg_action = MSG_EDIT_SENDER;
2539 one_msg_action = TRUE;
2541 else if (Ustrcmp(argrest, "f") == 0) msg_action = MSG_FREEZE;
2542 else if (Ustrcmp(argrest, "g") == 0)
2544 msg_action = MSG_DELIVER;
2545 deliver_give_up = TRUE;
2547 else if (Ustrcmp(argrest, "mad") == 0)
2549 msg_action = MSG_MARK_ALL_DELIVERED;
2551 else if (Ustrcmp(argrest, "md") == 0)
2553 msg_action = MSG_MARK_DELIVERED;
2554 one_msg_action = TRUE;
2556 else if (Ustrcmp(argrest, "rm") == 0) msg_action = MSG_REMOVE;
2557 else if (Ustrcmp(argrest, "set") == 0)
2559 msg_action = MSG_LOAD;
2560 one_msg_action = TRUE;
2562 else if (Ustrcmp(argrest, "t") == 0) msg_action = MSG_THAW;
2563 else if (Ustrcmp(argrest, "vb") == 0)
2565 msg_action = MSG_SHOW_BODY;
2566 one_msg_action = TRUE;
2568 else if (Ustrcmp(argrest, "vc") == 0)
2570 msg_action = MSG_SHOW_COPY;
2571 one_msg_action = TRUE;
2573 else if (Ustrcmp(argrest, "vh") == 0)
2575 msg_action = MSG_SHOW_HEADER;
2576 one_msg_action = TRUE;
2578 else if (Ustrcmp(argrest, "vl") == 0)
2580 msg_action = MSG_SHOW_LOG;
2581 one_msg_action = TRUE;
2583 else { badarg = TRUE; break; }
2585 /* All the -Mxx options require at least one message id. */
2587 msg_action_arg = i + 1;
2588 if (msg_action_arg >= argc)
2590 fprintf(stderr, "exim: no message ids given after %s option\n", arg);
2591 return EXIT_FAILURE;
2594 /* Some require only message ids to follow */
2596 if (!one_msg_action)
2599 for (j = msg_action_arg; j < argc; j++) if (!mac_ismsgid(argv[j]))
2601 fprintf(stderr, "exim: malformed message id %s after %s option\n",
2603 return EXIT_FAILURE;
2605 goto END_ARG; /* Remaining args are ids */
2608 /* Others require only one message id, possibly followed by addresses,
2609 which will be handled as normal arguments. */
2613 if (!mac_ismsgid(argv[msg_action_arg]))
2615 fprintf(stderr, "exim: malformed message id %s after %s option\n",
2616 argv[msg_action_arg], arg);
2617 return EXIT_FAILURE;
2624 /* Some programs seem to call the -om option without the leading o;
2625 for sendmail it askes for "me too". Exim always does this. */
2628 if (*argrest != 0) badarg = TRUE;
2632 /* -N: don't do delivery - a debugging option that stops transports doing
2633 their thing. It implies debugging at the D_v level. */
2638 dont_deliver = TRUE;
2639 debug_selector |= D_v;
2640 debug_file = stderr;
2646 /* -n: This means "don't alias" in sendmail, apparently. Just ignore
2652 /* -O: Just ignore it. In sendmail, apparently -O option=value means set
2653 option to the specified value. This form uses long names. We need to handle
2654 -O option=value and -Ooption=value. */
2661 fprintf(stderr, "exim: string expected after -O\n");
2669 /* -oA: Set an argument for the bi command (sendmail's "alternate alias
2672 if (*argrest == 'A')
2674 alias_arg = argrest + 1;
2675 if (alias_arg[0] == 0)
2677 if (i+1 < argc) alias_arg = argv[++i]; else
2679 fprintf(stderr, "exim: string expected after -oA\n");
2685 /* -oB: Set a connection message max value for remote deliveries */
2687 else if (*argrest == 'B')
2689 uschar *p = argrest + 1;
2692 if (i+1 < argc && isdigit((argv[i+1][0]))) p = argv[++i]; else
2694 connection_max_messages = 1;
2703 fprintf(stderr, "exim: number expected after -oB\n");
2706 connection_max_messages = Uatoi(p);
2710 /* -odb: background delivery */
2712 else if (Ustrcmp(argrest, "db") == 0)
2714 synchronous_delivery = FALSE;
2715 arg_queue_only = FALSE;
2716 queue_only_set = TRUE;
2719 /* -odf: foreground delivery (smail-compatible option); same effect as
2720 -odi: interactive (synchronous) delivery (sendmail-compatible option)
2723 else if (Ustrcmp(argrest, "df") == 0 || Ustrcmp(argrest, "di") == 0)
2725 synchronous_delivery = TRUE;
2726 arg_queue_only = FALSE;
2727 queue_only_set = TRUE;
2730 /* -odq: queue only */
2732 else if (Ustrcmp(argrest, "dq") == 0)
2734 synchronous_delivery = FALSE;
2735 arg_queue_only = TRUE;
2736 queue_only_set = TRUE;
2739 /* -odqs: queue SMTP only - do local deliveries and remote routing,
2740 but no remote delivery */
2742 else if (Ustrcmp(argrest, "dqs") == 0)
2745 arg_queue_only = FALSE;
2746 queue_only_set = TRUE;
2749 /* -oex: Sendmail error flags. As these are also accepted without the
2750 leading -o prefix, for compatibility with vacation and other callers,
2751 they are handled with -e above. */
2753 /* -oi: Set flag so dot doesn't end non-SMTP input (same as -i)
2754 -oitrue: Another sendmail syntax for the same */
2756 else if (Ustrcmp(argrest, "i") == 0 ||
2757 Ustrcmp(argrest, "itrue") == 0)
2760 /* -oM*: Set various characteristics for an incoming message; actually
2761 acted on for trusted callers only. */
2763 else if (*argrest == 'M')
2767 fprintf(stderr, "exim: data expected after -o%s\n", argrest);
2771 /* -oMa: Set sender host address */
2773 if (Ustrcmp(argrest, "Ma") == 0) sender_host_address = argv[++i];
2775 /* -oMaa: Set authenticator name */
2777 else if (Ustrcmp(argrest, "Maa") == 0)
2778 sender_host_authenticated = argv[++i];
2780 /* -oMas: setting authenticated sender */
2782 else if (Ustrcmp(argrest, "Mas") == 0) authenticated_sender = argv[++i];
2784 /* -oMai: setting authenticated id */
2786 else if (Ustrcmp(argrest, "Mai") == 0) authenticated_id = argv[++i];
2788 /* -oMi: Set incoming interface address */
2790 else if (Ustrcmp(argrest, "Mi") == 0) interface_address = argv[++i];
2792 /* -oMr: Received protocol */
2794 else if (Ustrcmp(argrest, "Mr") == 0) received_protocol = argv[++i];
2796 /* -oMs: Set sender host name */
2798 else if (Ustrcmp(argrest, "Ms") == 0) sender_host_name = argv[++i];
2800 /* -oMt: Set sender ident */
2802 else if (Ustrcmp(argrest, "Mt") == 0)
2804 sender_ident_set = TRUE;
2805 sender_ident = argv[++i];
2808 /* Else a bad argument */
2817 /* -om: Me-too flag for aliases. Exim always does this. Some programs
2818 seem to call this as -m (undocumented), so that is also accepted (see
2821 else if (Ustrcmp(argrest, "m") == 0) {}
2823 /* -oo: An ancient flag for old-style addresses which still seems to
2824 crop up in some calls (see in SCO). */
2826 else if (Ustrcmp(argrest, "o") == 0) {}
2828 /* -oP <name>: set pid file path for daemon */
2830 else if (Ustrcmp(argrest, "P") == 0)
2831 override_pid_file_path = argv[++i];
2833 /* -or <n>: set timeout for non-SMTP acceptance
2834 -os <n>: set timeout for SMTP acceptance */
2836 else if (*argrest == 'r' || *argrest == 's')
2838 int *tp = (*argrest == 'r')?
2839 &arg_receive_timeout : &arg_smtp_receive_timeout;
2840 if (argrest[1] == 0)
2842 if (i+1 < argc) *tp= readconf_readtime(argv[++i], 0, FALSE);
2844 else *tp = readconf_readtime(argrest + 1, 0, FALSE);
2847 fprintf(stderr, "exim: bad time value %s: abandoned\n", argv[i]);
2852 /* -oX <list>: Override local_interfaces and/or default daemon ports */
2854 else if (Ustrcmp(argrest, "X") == 0)
2855 override_local_interfaces = argv[++i];
2857 /* Unknown -o argument */
2863 /* -ps: force Perl startup; -pd force delayed Perl startup */
2867 if (*argrest == 's' && argrest[1] == 0)
2869 perl_start_option = 1;
2872 if (*argrest == 'd' && argrest[1] == 0)
2874 perl_start_option = -1;
2879 /* -panythingelse is taken as the Sendmail-compatible argument -prval:sval,
2880 which sets the host protocol and host name */
2884 if (i+1 < argc) argrest = argv[++i]; else
2885 { badarg = TRUE; break; }
2890 uschar *hn = Ustrchr(argrest, ':');
2893 received_protocol = argrest;
2897 received_protocol = string_copyn(argrest, hn - argrest);
2898 sender_host_name = hn + 1;
2905 receiving_message = FALSE;
2906 if (queue_interval >= 0)
2908 fprintf(stderr, "exim: -q specified more than once\n");
2912 /* -qq...: Do queue runs in a 2-stage manner */
2914 if (*argrest == 'q')
2916 queue_2stage = TRUE;
2920 /* -qi...: Do only first (initial) deliveries */
2922 if (*argrest == 'i')
2924 queue_run_first_delivery = TRUE;
2928 /* -qf...: Run the queue, forcing deliveries
2929 -qff..: Ditto, forcing thawing as well */
2931 if (*argrest == 'f')
2933 queue_run_force = TRUE;
2934 if (*(++argrest) == 'f')
2936 deliver_force_thaw = TRUE;
2941 /* -q[f][f]l...: Run the queue only on local deliveries */
2943 if (*argrest == 'l')
2945 queue_run_local = TRUE;
2949 /* -q[f][f][l]: Run the queue, optionally forced, optionally local only,
2950 optionally starting from a given message id. */
2952 if (*argrest == 0 &&
2953 (i + 1 >= argc || argv[i+1][0] == '-' || mac_ismsgid(argv[i+1])))
2956 if (i+1 < argc && mac_ismsgid(argv[i+1]))
2957 start_queue_run_id = argv[++i];
2958 if (i+1 < argc && mac_ismsgid(argv[i+1]))
2959 stop_queue_run_id = argv[++i];
2962 /* -q[f][f][l]<n>: Run the queue at regular intervals, optionally forced,
2963 optionally local only. */
2968 queue_interval = readconf_readtime(argrest, 0, FALSE);
2970 queue_interval = readconf_readtime(argv[++i], 0, FALSE);
2971 if (queue_interval <= 0)
2973 fprintf(stderr, "exim: bad time value %s: abandoned\n", argv[i]);
2980 case 'R': /* Synonymous with -qR... */
2981 receiving_message = FALSE;
2983 /* -Rf: As -R (below) but force all deliveries,
2984 -Rff: Ditto, but also thaw all frozen messages,
2985 -Rr: String is regex
2986 -Rrf: Regex and force
2987 -Rrff: Regex and force and thaw
2989 in all cases provided there are no further characters in this
2995 for (i = 0; i < sizeof(rsopts)/sizeof(uschar *); i++)
2997 if (Ustrcmp(argrest, rsopts[i]) == 0)
2999 if (i != 2) queue_run_force = TRUE;
3000 if (i >= 2) deliver_selectstring_regex = TRUE;
3001 if (i == 1 || i == 4) deliver_force_thaw = TRUE;
3002 argrest += Ustrlen(rsopts[i]);
3007 /* -R: Set string to match in addresses for forced queue run to
3008 pick out particular messages. */
3012 if (i+1 < argc) deliver_selectstring = argv[++i]; else
3014 fprintf(stderr, "exim: string expected after -R\n");
3018 else deliver_selectstring = argrest;
3022 /* -r: an obsolete synonym for -f (see above) */
3025 /* -S: Like -R but works on sender. */
3027 case 'S': /* Synonymous with -qS... */
3028 receiving_message = FALSE;
3030 /* -Sf: As -S (below) but force all deliveries,
3031 -Sff: Ditto, but also thaw all frozen messages,
3032 -Sr: String is regex
3033 -Srf: Regex and force
3034 -Srff: Regex and force and thaw
3036 in all cases provided there are no further characters in this
3042 for (i = 0; i < sizeof(rsopts)/sizeof(uschar *); i++)
3044 if (Ustrcmp(argrest, rsopts[i]) == 0)
3046 if (i != 2) queue_run_force = TRUE;
3047 if (i >= 2) deliver_selectstring_sender_regex = TRUE;
3048 if (i == 1 || i == 4) deliver_force_thaw = TRUE;
3049 argrest += Ustrlen(rsopts[i]);
3054 /* -S: Set string to match in addresses for forced queue run to
3055 pick out particular messages. */
3059 if (i+1 < argc) deliver_selectstring_sender = argv[++i]; else
3061 fprintf(stderr, "exim: string expected after -S\n");
3065 else deliver_selectstring_sender = argrest;
3068 /* -Tqt is an option that is exclusively for use by the testing suite.
3069 It is not recognized in other circumstances. It allows for the setting up
3070 of explicit "queue times" so that various warning/retry things can be
3071 tested. Otherwise variability of clock ticks etc. cause problems. */
3074 if (running_in_test_harness && Ustrcmp(argrest, "qt") == 0)
3075 fudged_queue_times = argv[++i];
3080 /* -t: Set flag to extract recipients from body of message. */
3083 if (*argrest == 0) extract_recipients = TRUE;
3085 /* -ti: Set flag to extract recipients from body of message, and also
3086 specify that dot does not end the message. */
3088 else if (Ustrcmp(argrest, "i") == 0)
3090 extract_recipients = TRUE;
3094 /* -tls-on-connect: don't wait for STARTTLS (for old clients) */
3097 else if (Ustrcmp(argrest, "ls-on-connect") == 0) tls_on_connect = TRUE;
3104 /* -U: This means "initial user submission" in sendmail, apparently. The
3105 doc claims that in future sendmail may refuse syntactically invalid
3106 messages instead of fixing them. For the moment, we just ignore it. */
3112 /* -v: verify things - this is a very low-level debugging */
3117 debug_selector |= D_v;
3118 debug_file = stderr;
3124 /* -x: AIX uses this to indicate some fancy 8-bit character stuff:
3126 The -x flag tells the sendmail command that mail from a local
3127 mail program has National Language Support (NLS) extended characters
3128 in the body of the mail item. The sendmail command can send mail with
3129 extended NLS characters across networks that normally corrupts these
3132 As Exim is 8-bit clean, it just ignores this flag. */
3135 if (*argrest != 0) badarg = TRUE;
3138 /* All other initial characters are errors */
3143 } /* End of high-level switch statement */
3145 /* Failed to recognize the option, or syntax error */
3149 fprintf(stderr, "exim abandoned: unknown, malformed, or incomplete "
3150 "option %s\n", arg);
3156 /* If -R or -S have been specified without -q, assume a single queue run. */
3158 if ((deliver_selectstring != NULL || deliver_selectstring_sender != NULL) &&
3159 queue_interval < 0) queue_interval = 0;
3163 /* If usage_wanted is set we call the usage function - which never returns */
3164 if (usage_wanted) exim_usage(called_as);
3166 /* Arguments have been processed. Check for incompatibilities. */
3168 (smtp_input || extract_recipients || recipients_arg < argc) &&
3169 (daemon_listen || queue_interval >= 0 || bi_option ||
3170 test_retry_arg >= 0 || test_rewrite_arg >= 0 ||
3171 filter_test != FTEST_NONE || (msg_action_arg > 0 && !one_msg_action))
3174 msg_action_arg > 0 &&
3175 (daemon_listen || queue_interval >= 0 || list_options ||
3176 (checking && msg_action != MSG_LOAD) ||
3177 bi_option || test_retry_arg >= 0 || test_rewrite_arg >= 0)
3180 (daemon_listen || queue_interval >= 0) &&
3181 (sender_address != NULL || list_options || list_queue || checking ||
3185 daemon_listen && queue_interval == 0
3189 (checking || smtp_input || extract_recipients ||
3190 filter_test != FTEST_NONE || bi_option)
3193 verify_address_mode &&
3194 (address_test_mode || smtp_input || extract_recipients ||
3195 filter_test != FTEST_NONE || bi_option)
3198 address_test_mode && (smtp_input || extract_recipients ||
3199 filter_test != FTEST_NONE || bi_option)
3202 smtp_input && (sender_address != NULL || filter_test != FTEST_NONE ||
3206 deliver_selectstring != NULL && queue_interval < 0
3209 msg_action == MSG_LOAD &&
3210 (!expansion_test || expansion_test_message != NULL)
3214 fprintf(stderr, "exim: incompatible command-line options or arguments\n");
3218 /* If debugging is set up, set the file and the file descriptor to pass on to
3219 child processes. It should, of course, be 2 for stderr. Also, force the daemon
3220 to run in the foreground. */
3222 if (debug_selector != 0)
3224 debug_file = stderr;
3225 debug_fd = fileno(debug_file);
3226 background_daemon = FALSE;
3227 if (running_in_test_harness) millisleep(100); /* lets caller finish */
3228 if (debug_selector != D_v) /* -v only doesn't show this */
3230 debug_printf("Exim version %s uid=%ld gid=%ld pid=%d D=%x\n",
3231 version_string, (long int)real_uid, (long int)real_gid, (int)getpid(),
3233 if (!version_printed)
3234 show_whats_supported(stderr);
3238 /* When started with root privilege, ensure that the limits on the number of
3239 open files and the number of processes (where that is accessible) are
3240 sufficiently large, or are unset, in case Exim has been called from an
3241 environment where the limits are screwed down. Not all OS have the ability to
3242 change some of these limits. */
3246 DEBUG(D_any) debug_print_ids(US"Exim has no root privilege:");
3252 #ifdef RLIMIT_NOFILE
3253 if (getrlimit(RLIMIT_NOFILE, &rlp) < 0)
3255 log_write(0, LOG_MAIN|LOG_PANIC, "getrlimit(RLIMIT_NOFILE) failed: %s",
3257 rlp.rlim_cur = rlp.rlim_max = 0;
3260 /* I originally chose 1000 as a nice big number that was unlikely to
3261 be exceeded. It turns out that some older OS have a fixed upper limit of
3264 if (rlp.rlim_cur < 1000)
3266 rlp.rlim_cur = rlp.rlim_max = 1000;
3267 if (setrlimit(RLIMIT_NOFILE, &rlp) < 0)
3269 rlp.rlim_cur = rlp.rlim_max = 256;
3270 if (setrlimit(RLIMIT_NOFILE, &rlp) < 0)
3271 log_write(0, LOG_MAIN|LOG_PANIC, "setrlimit(RLIMIT_NOFILE) failed: %s",
3278 if (getrlimit(RLIMIT_NPROC, &rlp) < 0)
3280 log_write(0, LOG_MAIN|LOG_PANIC, "getrlimit(RLIMIT_NPROC) failed: %s",
3282 rlp.rlim_cur = rlp.rlim_max = 0;
3285 #ifdef RLIM_INFINITY
3286 if (rlp.rlim_cur != RLIM_INFINITY && rlp.rlim_cur < 1000)
3288 rlp.rlim_cur = rlp.rlim_max = RLIM_INFINITY;
3290 if (rlp.rlim_cur < 1000)
3292 rlp.rlim_cur = rlp.rlim_max = 1000;
3294 if (setrlimit(RLIMIT_NPROC, &rlp) < 0)
3295 log_write(0, LOG_MAIN|LOG_PANIC, "setrlimit(RLIMIT_NPROC) failed: %s",
3301 /* Exim is normally entered as root (but some special configurations are
3302 possible that don't do this). However, it always spins off sub-processes that
3303 set their uid and gid as required for local delivery. We don't want to pass on
3304 any extra groups that root may belong to, so we want to get rid of them all at
3307 We need to obey setgroups() at this stage, before possibly giving up root
3308 privilege for a changed configuration file, but later on we might need to
3309 check on the additional groups for the admin user privilege - can't do that
3310 till after reading the config, which might specify the exim gid. Therefore,
3311 save the group list here first. */
3313 group_count = getgroups(NGROUPS_MAX, group_list);
3314 if (group_count < 0)
3316 fprintf(stderr, "exim: getgroups() failed: %s\n", strerror(errno));
3320 /* There is a fundamental difference in some BSD systems in the matter of
3321 groups. FreeBSD and BSDI are known to be different; NetBSD and OpenBSD are
3322 known not to be different. On the "different" systems there is a single group
3323 list, and the first entry in it is the current group. On all other versions of
3324 Unix there is a supplementary group list, which is in *addition* to the current
3325 group. Consequently, to get rid of all extraneous groups on a "standard" system
3326 you pass over 0 groups to setgroups(), while on a "different" system you pass
3327 over a single group - the current group, which is always the first group in the
3328 list. Calling setgroups() with zero groups on a "different" system results in
3329 an error return. The following code should cope with both types of system.
3331 However, if this process isn't running as root, setgroups() can't be used
3332 since you have to be root to run it, even if throwing away groups. Not being
3333 root here happens only in some unusual configurations. We just ignore the
3336 if (setgroups(0, NULL) != 0)
3338 if (setgroups(1, group_list) != 0 && !unprivileged)
3340 fprintf(stderr, "exim: setgroups() failed: %s\n", strerror(errno));
3345 /* If the configuration file name has been altered by an argument on the
3346 command line (either a new file name or a macro definition) and the caller is
3347 not root, or if this is a filter testing run, remove any setuid privilege the
3348 program has and run as the underlying user.
3350 The exim user is locked out of this, which severely restricts the use of -C
3353 Otherwise, set the real ids to the effective values (should be root unless run
3354 from inetd, which it can either be root or the exim uid, if one is configured).
3356 There is a private mechanism for bypassing some of this, in order to make it
3357 possible to test lots of configurations automatically, without having either to
3358 recompile each time, or to patch in an actual configuration file name and other
3359 values (such as the path name). If running in the test harness, pretend that
3360 configuration file changes and macro definitions haven't happened. */
3363 (!trusted_config || /* Config changed, or */
3364 !macros_trusted()) && /* impermissible macros and */
3365 real_uid != root_uid && /* Not root, and */
3366 !running_in_test_harness /* Not fudged */
3368 expansion_test /* expansion testing */
3370 filter_test != FTEST_NONE) /* Filter testing */
3372 setgroups(group_count, group_list);
3373 exim_setugid(real_uid, real_gid, FALSE,
3374 US"-C, -D, -be or -bf forces real uid");
3375 removed_privilege = TRUE;
3377 /* In the normal case when Exim is called like this, stderr is available
3378 and should be used for any logging information because attempts to write
3379 to the log will usually fail. To arrange this, we unset really_exim. However,
3380 if no stderr is available there is no point - we might as well have a go
3381 at the log (if it fails, syslog will be written).
3383 Note that if the invoker is Exim, the logs remain available. Messing with
3384 this causes unlogged successful deliveries. */
3386 if ((log_stderr != NULL) && (real_uid != exim_uid))
3387 really_exim = FALSE;
3390 /* Privilege is to be retained for the moment. It may be dropped later,
3391 depending on the job that this Exim process has been asked to do. For now, set
3392 the real uid to the effective so that subsequent re-execs of Exim are done by a
3395 else exim_setugid(geteuid(), getegid(), FALSE, US"forcing real = effective");
3397 /* If testing a filter, open the file(s) now, before wasting time doing other
3398 setups and reading the message. */
3400 if ((filter_test & FTEST_SYSTEM) != 0)
3402 filter_sfd = Uopen(filter_test_sfile, O_RDONLY, 0);
3405 fprintf(stderr, "exim: failed to open %s: %s\n", filter_test_sfile,
3407 return EXIT_FAILURE;
3411 if ((filter_test & FTEST_USER) != 0)
3413 filter_ufd = Uopen(filter_test_ufile, O_RDONLY, 0);
3416 fprintf(stderr, "exim: failed to open %s: %s\n", filter_test_ufile,
3418 return EXIT_FAILURE;
3422 /* Read the main runtime configuration data; this gives up if there
3423 is a failure. It leaves the configuration file open so that the subsequent
3424 configuration data for delivery can be read if needed. */
3428 /* Handle the decoding of logging options. */
3430 decode_bits(&log_write_selector, &log_extra_selector, 0, 0,
3431 log_selector_string, log_options, log_options_count, US"log", 0);
3435 debug_printf("configuration file is %s\n", config_main_filename);
3436 debug_printf("log selectors = %08x %08x\n", log_write_selector,
3437 log_extra_selector);
3440 /* If domain literals are not allowed, check the sender address that was
3441 supplied with -f. Ditto for a stripped trailing dot. */
3443 if (sender_address != NULL)
3445 if (sender_address[sender_address_domain] == '[' && !allow_domain_literals)
3447 fprintf(stderr, "exim: bad -f address \"%s\": domain literals not "
3448 "allowed\n", sender_address);
3449 return EXIT_FAILURE;
3451 if (f_end_dot && !strip_trailing_dot)
3453 fprintf(stderr, "exim: bad -f address \"%s.\": domain is malformed "
3454 "(trailing dot not allowed)\n", sender_address);
3455 return EXIT_FAILURE;
3459 /* Paranoia check of maximum lengths of certain strings. There is a check
3460 on the length of the log file path in log.c, which will come into effect
3461 if there are any calls to write the log earlier than this. However, if we
3462 get this far but the string is very long, it is better to stop now than to
3463 carry on and (e.g.) receive a message and then have to collapse. The call to
3464 log_write() from here will cause the ultimate panic collapse if the complete
3465 file name exceeds the buffer length. */
3467 if (Ustrlen(log_file_path) > 200)
3468 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3469 "log_file_path is longer than 200 chars: aborting");
3471 if (Ustrlen(pid_file_path) > 200)
3472 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3473 "pid_file_path is longer than 200 chars: aborting");
3475 if (Ustrlen(spool_directory) > 200)
3476 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3477 "spool_directory is longer than 200 chars: aborting");
3479 /* Length check on the process name given to syslog for its TAG field,
3480 which is only permitted to be 32 characters or less. See RFC 3164. */
3482 if (Ustrlen(syslog_processname) > 32)
3483 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3484 "syslog_processname is longer than 32 chars: aborting");
3486 /* In some operating systems, the environment variable TMPDIR controls where
3487 temporary files are created; Exim doesn't use these (apart from when delivering
3488 to MBX mailboxes), but called libraries such as DBM libraries may require them.
3489 If TMPDIR is found in the environment, reset it to the value defined in the
3490 TMPDIR macro, if this macro is defined. */
3495 for (p = USS environ; *p != NULL; p++)
3497 if (Ustrncmp(*p, "TMPDIR=", 7) == 0 &&
3498 Ustrcmp(*p+7, TMPDIR) != 0)
3500 uschar *newp = malloc(Ustrlen(TMPDIR) + 8);
3501 sprintf(CS newp, "TMPDIR=%s", TMPDIR);
3503 DEBUG(D_any) debug_printf("reset TMPDIR=%s in environment\n", TMPDIR);
3509 /* Timezone handling. If timezone_string is "utc", set a flag to cause all
3510 timestamps to be in UTC (gmtime() is used instead of localtime()). Otherwise,
3511 we may need to get rid of a bogus timezone setting. This can arise when Exim is
3512 called by a user who has set the TZ variable. This then affects the timestamps
3513 in log files and in Received: headers, and any created Date: header lines. The
3514 required timezone is settable in the configuration file, so nothing can be done
3515 about this earlier - but hopefully nothing will normally be logged earlier than
3516 this. We have to make a new environment if TZ is wrong, but don't bother if
3517 timestamps_utc is set, because then all times are in UTC anyway. */
3519 if (timezone_string != NULL && strcmpic(timezone_string, US"UTC") == 0)
3521 timestamps_utc = TRUE;
3525 uschar *envtz = US getenv("TZ");
3526 if ((envtz == NULL && timezone_string != NULL) ||
3528 (timezone_string == NULL ||
3529 Ustrcmp(timezone_string, envtz) != 0)))
3531 uschar **p = USS environ;
3535 while (*p++ != NULL) count++;
3536 if (envtz == NULL) count++;
3537 newp = new = malloc(sizeof(uschar *) * (count + 1));
3538 for (p = USS environ; *p != NULL; p++)
3540 if (Ustrncmp(*p, "TZ=", 3) == 0) continue;
3543 if (timezone_string != NULL)
3545 *newp = malloc(Ustrlen(timezone_string) + 4);
3546 sprintf(CS *newp++, "TZ=%s", timezone_string);
3551 DEBUG(D_any) debug_printf("Reset TZ to %s: time is %s\n", timezone_string,
3552 tod_stamp(tod_log));
3556 /* Handle the case when we have removed the setuid privilege because of -C or
3557 -D. This means that the caller of Exim was not root.
3559 There is a problem if we were running as the Exim user. The sysadmin may
3560 expect this case to retain privilege because "the binary was called by the
3561 Exim user", but it hasn't, because either the -D option set macros, or the
3562 -C option set a non-trusted configuration file. There are two possibilities:
3564 (1) If deliver_drop_privilege is set, Exim is not going to re-exec in order
3565 to do message deliveries. Thus, the fact that it is running as a
3566 non-privileged user is plausible, and might be wanted in some special
3567 configurations. However, really_exim will have been set false when
3568 privilege was dropped, to stop Exim trying to write to its normal log
3569 files. Therefore, re-enable normal log processing, assuming the sysadmin
3570 has set up the log directory correctly.
3572 (2) If deliver_drop_privilege is not set, the configuration won't work as
3573 apparently intended, and so we log a panic message. In order to retain
3574 root for -C or -D, the caller must either be root or be invoking a
3575 trusted configuration file (when deliver_drop_privilege is false). */
3577 if (removed_privilege && (!trusted_config || macros != NULL) &&
3578 real_uid == exim_uid)
3580 if (deliver_drop_privilege)
3581 really_exim = TRUE; /* let logging work normally */
3583 log_write(0, LOG_MAIN|LOG_PANIC,
3584 "exim user lost privilege for using %s option",
3585 trusted_config? "-D" : "-C");
3588 /* Start up Perl interpreter if Perl support is configured and there is a
3589 perl_startup option, and the configuration or the command line specifies
3590 initializing starting. Note that the global variables are actually called
3591 opt_perl_xxx to avoid clashing with perl's namespace (perl_*). */
3594 if (perl_start_option != 0)
3595 opt_perl_at_start = (perl_start_option > 0);
3596 if (opt_perl_at_start && opt_perl_startup != NULL)
3599 DEBUG(D_any) debug_printf("Starting Perl interpreter\n");
3600 errstr = init_perl(opt_perl_startup);
3603 fprintf(stderr, "exim: error in perl_startup code: %s\n", errstr);
3604 return EXIT_FAILURE;
3606 opt_perl_started = TRUE;
3608 #endif /* EXIM_PERL */
3610 /* Initialise lookup_list
3611 If debugging, already called above via version reporting.
3612 This does mean that debugging causes the list to be initialised while root.
3613 This *should* be harmless -- all modules are loaded from a fixed dir and
3614 it's code that would, if not a module, be part of Exim already. */
3617 /* Log the arguments of the call if the configuration file said so. This is
3618 a debugging feature for finding out what arguments certain MUAs actually use.
3619 Don't attempt it if logging is disabled, or if listing variables or if
3620 verifying/testing addresses or expansions. */
3622 if (((debug_selector & D_any) != 0 || (log_extra_selector & LX_arguments) != 0)
3623 && really_exim && !list_options && !checking)
3626 uschar *p = big_buffer;
3628 (void)getcwd(CS p+4, big_buffer_size - 4);
3630 (void)string_format(p, big_buffer_size - (p - big_buffer), " %d args:", argc);
3632 for (i = 0; i < argc; i++)
3634 int len = Ustrlen(argv[i]);
3637 if (p + len + 8 >= big_buffer + big_buffer_size)
3640 log_write(0, LOG_MAIN, "%s", big_buffer);
3641 Ustrcpy(big_buffer, "...");
3644 printing = string_printing(argv[i]);
3645 if (printing[0] == 0) quote = US"\""; else
3647 uschar *pp = printing;
3649 while (*pp != 0) if (isspace(*pp++)) { quote = US"\""; break; }
3651 sprintf(CS p, " %s%.*s%s", quote, (int)(big_buffer_size -
3652 (p - big_buffer) - 4), printing, quote);
3656 if ((log_extra_selector & LX_arguments) != 0)
3657 log_write(0, LOG_MAIN, "%s", big_buffer);
3659 debug_printf("%s\n", big_buffer);
3662 /* Set the working directory to be the top-level spool directory. We don't rely
3663 on this in the code, which always uses fully qualified names, but it's useful
3664 for core dumps etc. Don't complain if it fails - the spool directory might not
3665 be generally accessible and calls with the -C option (and others) have lost
3666 privilege by now. Before the chdir, we try to ensure that the directory exists.
3669 if (Uchdir(spool_directory) != 0)
3671 (void)directory_make(spool_directory, US"", SPOOL_DIRECTORY_MODE, FALSE);
3672 (void)Uchdir(spool_directory);
3675 /* Handle calls with the -bi option. This is a sendmail option to rebuild *the*
3676 alias file. Exim doesn't have such a concept, but this call is screwed into
3677 Sun's YP makefiles. Handle this by calling a configured script, as the real
3678 user who called Exim. The -oA option can be used to pass an argument to the
3683 (void)fclose(config_file);
3684 if (bi_command != NULL)
3688 argv[i++] = bi_command;
3689 if (alias_arg != NULL) argv[i++] = alias_arg;
3692 setgroups(group_count, group_list);
3693 exim_setugid(real_uid, real_gid, FALSE, US"running bi_command");
3695 DEBUG(D_exec) debug_printf("exec %.256s %.256s\n", argv[0],
3696 (argv[1] == NULL)? US"" : argv[1]);
3698 execv(CS argv[0], (char *const *)argv);
3699 fprintf(stderr, "exim: exec failed: %s\n", strerror(errno));
3704 DEBUG(D_any) debug_printf("-bi used but bi_command not set; exiting\n");
3709 /* If an action on specific messages is requested, or if a daemon or queue
3710 runner is being started, we need to know if Exim was called by an admin user.
3711 This is the case if the real user is root or exim, or if the real group is
3712 exim, or if one of the supplementary groups is exim or a group listed in
3713 admin_groups. We don't fail all message actions immediately if not admin_user,
3714 since some actions can be performed by non-admin users. Instead, set admin_user
3715 for later interrogation. */
3717 if (real_uid == root_uid || real_uid == exim_uid || real_gid == exim_gid)
3722 for (i = 0; i < group_count; i++)
3724 if (group_list[i] == exim_gid) admin_user = TRUE;
3725 else if (admin_groups != NULL)
3727 for (j = 1; j <= (int)(admin_groups[0]); j++)
3728 if (admin_groups[j] == group_list[i])
3729 { admin_user = TRUE; break; }
3731 if (admin_user) break;
3735 /* Another group of privileged users are the trusted users. These are root,
3736 exim, and any caller matching trusted_users or trusted_groups. Trusted callers
3737 are permitted to specify sender_addresses with -f on the command line, and
3738 other message parameters as well. */
3740 if (real_uid == root_uid || real_uid == exim_uid)
3741 trusted_caller = TRUE;
3746 if (trusted_users != NULL)
3748 for (i = 1; i <= (int)(trusted_users[0]); i++)
3749 if (trusted_users[i] == real_uid)
3750 { trusted_caller = TRUE; break; }
3753 if (!trusted_caller && trusted_groups != NULL)
3755 for (i = 1; i <= (int)(trusted_groups[0]); i++)
3757 if (trusted_groups[i] == real_gid)
3758 trusted_caller = TRUE;
3759 else for (j = 0; j < group_count; j++)
3761 if (trusted_groups[i] == group_list[j])
3762 { trusted_caller = TRUE; break; }
3764 if (trusted_caller) break;
3769 if (trusted_caller) DEBUG(D_any) debug_printf("trusted user\n");
3770 if (admin_user) DEBUG(D_any) debug_printf("admin user\n");
3772 /* Only an admin user may start the daemon or force a queue run in the default
3773 configuration, but the queue run restriction can be relaxed. Only an admin
3774 user may request that a message be returned to its sender forthwith. Only an
3775 admin user may specify a debug level greater than D_v (because it might show
3776 passwords, etc. in lookup queries). Only an admin user may request a queue
3777 count. Only an admin user can use the test interface to scan for email
3778 (because Exim will be in the spool dir and able to look at mails). */
3782 BOOL debugset = (debug_selector & ~D_v) != 0;
3783 if (deliver_give_up || daemon_listen || malware_test_file ||
3784 (count_queue && queue_list_requires_admin) ||
3785 (list_queue && queue_list_requires_admin) ||
3786 (queue_interval >= 0 && prod_requires_admin) ||
3787 (debugset && !running_in_test_harness))
3789 fprintf(stderr, "exim:%s permission denied\n", debugset? " debugging" : "");
3794 /* If the real user is not root or the exim uid, the argument for passing
3795 in an open TCP/IP connection for another message is not permitted, nor is
3796 running with the -N option for any delivery action, unless this call to exim is
3797 one that supplied an input message, or we are using a patched exim for
3798 regression testing. */
3800 if (real_uid != root_uid && real_uid != exim_uid &&
3801 (continue_hostname != NULL ||
3803 (queue_interval >= 0 || daemon_listen || msg_action_arg > 0)
3804 )) && !running_in_test_harness)
3806 fprintf(stderr, "exim: Permission denied\n");
3807 return EXIT_FAILURE;
3810 /* If the caller is not trusted, certain arguments are ignored when running for
3811 real, but are permitted when checking things (-be, -bv, -bt, -bh, -bf, -bF).
3812 Note that authority for performing certain actions on messages is tested in the
3813 queue_action() function. */
3815 if (!trusted_caller && !checking && filter_test == FTEST_NONE)
3817 sender_host_name = sender_host_address = interface_address =
3818 sender_ident = received_protocol = NULL;
3819 sender_host_port = interface_port = 0;
3820 sender_host_authenticated = authenticated_sender = authenticated_id = NULL;
3823 /* If a sender host address is set, extract the optional port number off the
3824 end of it and check its syntax. Do the same thing for the interface address.
3825 Exim exits if the syntax is bad. */
3829 if (sender_host_address != NULL)
3830 sender_host_port = check_port(sender_host_address);
3831 if (interface_address != NULL)
3832 interface_port = check_port(interface_address);
3835 /* If an SMTP message is being received check to see if the standard input is a
3836 TCP/IP socket. If it is, we assume that Exim was called from inetd if the
3837 caller is root or the Exim user, or if the port is a privileged one. Otherwise,
3842 union sockaddr_46 inetd_sock;
3843 EXIM_SOCKLEN_T size = sizeof(inetd_sock);
3844 if (getpeername(0, (struct sockaddr *)(&inetd_sock), &size) == 0)
3846 int family = ((struct sockaddr *)(&inetd_sock))->sa_family;
3847 if (family == AF_INET || family == AF_INET6)
3849 union sockaddr_46 interface_sock;
3850 size = sizeof(interface_sock);
3852 if (getsockname(0, (struct sockaddr *)(&interface_sock), &size) == 0)
3853 interface_address = host_ntoa(-1, &interface_sock, NULL,
3856 if (host_is_tls_on_connect_port(interface_port)) tls_on_connect = TRUE;
3858 if (real_uid == root_uid || real_uid == exim_uid || interface_port < 1024)
3861 sender_host_address = host_ntoa(-1, (struct sockaddr *)(&inetd_sock),
3862 NULL, &sender_host_port);
3863 if (mua_wrapper) log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Input from "
3864 "inetd is not supported when mua_wrapper is set");
3869 "exim: Permission denied (unprivileged user, unprivileged port)\n");
3870 return EXIT_FAILURE;
3876 /* If the load average is going to be needed while receiving a message, get it
3877 now for those OS that require the first call to os_getloadavg() to be done as
3878 root. There will be further calls later for each message received. */
3880 #ifdef LOAD_AVG_NEEDS_ROOT
3881 if (receiving_message &&
3882 (queue_only_load >= 0 ||
3883 (is_inetd && smtp_load_reserve >= 0)
3886 load_average = OS_GETLOADAVG();
3890 /* The queue_only configuration option can be overridden by -odx on the command
3891 line, except that if queue_only_override is false, queue_only cannot be unset
3892 from the command line. */
3894 if (queue_only_set && (queue_only_override || arg_queue_only))
3895 queue_only = arg_queue_only;
3897 /* The receive_timeout and smtp_receive_timeout options can be overridden by
3900 if (arg_receive_timeout >= 0) receive_timeout = arg_receive_timeout;
3901 if (arg_smtp_receive_timeout >= 0)
3902 smtp_receive_timeout = arg_smtp_receive_timeout;
3904 /* If Exim was started with root privilege, unless we have already removed the
3905 root privilege above as a result of -C, -D, -be, -bf or -bF, remove it now
3906 except when starting the daemon or doing some kind of delivery or address
3907 testing (-bt). These are the only cases when root need to be retained. We run
3908 as exim for -bv and -bh. However, if deliver_drop_privilege is set, root is
3909 retained only for starting the daemon. We always do the initgroups() in this
3910 situation (controlled by the TRUE below), in order to be as close as possible
3911 to the state Exim usually runs in. */
3913 if (!unprivileged && /* originally had root AND */
3914 !removed_privilege && /* still got root AND */
3915 !daemon_listen && /* not starting the daemon */
3916 queue_interval <= 0 && /* (either kind of daemon) */
3918 deliver_drop_privilege || /* requested unprivileged */
3920 queue_interval < 0 && /* not running the queue */
3921 (msg_action_arg < 0 || /* and */
3922 msg_action != MSG_DELIVER) && /* not delivering and */
3923 (!checking || !address_test_mode) /* not address checking */
3927 exim_setugid(exim_uid, exim_gid, TRUE, US"privilege not needed");
3930 /* When we are retaining a privileged uid, we still change to the exim gid. */
3935 rv = setgid(exim_gid);
3936 /* Impact of failure is that some stuff might end up with an incorrect group.
3937 We track this for failures from root, since any attempt to change privilege
3938 by root should succeed and failures should be examined. For non-root,
3939 there's no security risk. For me, it's { exim -bV } on a just-built binary,
3940 no need to complain then. */
3943 if (!(unprivileged || removed_privilege))
3946 "exim: changing group failed: %s\n", strerror(errno));
3950 DEBUG(D_any) debug_printf("changing group to %ld failed: %s\n",
3951 (long int)exim_gid, strerror(errno));
3955 /* Handle a request to scan a file for malware */
3956 if (malware_test_file)
3958 #ifdef WITH_CONTENT_SCAN
3960 set_process_info("scanning file for malware");
3961 result = malware_in_file(malware_test_file);
3964 printf("No malware found.\n");
3969 printf("Malware lookup returned non-okay/fail: %d\n", result);
3973 printf("Malware found: %s\n", malware_name);
3975 printf("Malware scan detected malware of unknown name.\n");
3977 printf("Malware scanning not enabled at compile time.\n");
3982 /* Handle a request to list the delivery queue */
3986 set_process_info("listing the queue");
3987 queue_list(list_queue_option, argv + recipients_arg, argc - recipients_arg);
3991 /* Handle a request to count the delivery queue */
3995 set_process_info("counting the queue");
4000 /* Handle actions on specific messages, except for the force delivery and
4001 message load actions, which are done below. Some actions take a whole list of
4002 message ids, which are known to continue up to the end of the arguments. Others
4003 take a single message id and then operate on the recipients list. */
4005 if (msg_action_arg > 0 && msg_action != MSG_DELIVER && msg_action != MSG_LOAD)
4007 int yield = EXIT_SUCCESS;
4008 set_process_info("acting on specified messages");
4010 if (!one_msg_action)
4012 for (i = msg_action_arg; i < argc; i++)
4013 if (!queue_action(argv[i], msg_action, NULL, 0, 0))
4014 yield = EXIT_FAILURE;
4017 else if (!queue_action(argv[msg_action_arg], msg_action, argv, argc,
4018 recipients_arg)) yield = EXIT_FAILURE;
4022 /* All the modes below here require the remaining configuration sections
4023 to be read, except that we can skip over the ACL setting when delivering
4024 specific messages, or doing a queue run. (For various testing cases we could
4025 skip too, but as they are rare, it doesn't really matter.) The argument is TRUE
4028 readconf_rest(msg_action_arg > 0 || (queue_interval == 0 && !daemon_listen));
4030 /* The configuration data will have been read into POOL_PERM because we won't
4031 ever want to reset back past it. Change the current pool to POOL_MAIN. In fact,
4032 this is just a bit of pedantic tidiness. It wouldn't really matter if the
4033 configuration were read into POOL_MAIN, because we don't do any resets till
4034 later on. However, it seems right, and it does ensure that both pools get used.
4037 store_pool = POOL_MAIN;
4039 /* Handle the -brt option. This is for checking out retry configurations.
4040 The next three arguments are a domain name or a complete address, and
4041 optionally two error numbers. All it does is to call the function that
4042 scans the retry configuration data. */
4044 if (test_retry_arg >= 0)
4046 retry_config *yield;
4047 int basic_errno = 0;
4051 if (test_retry_arg >= argc)
4053 printf("-brt needs a domain or address argument\n");
4054 exim_exit(EXIT_FAILURE);
4056 s1 = argv[test_retry_arg++];
4059 /* If the first argument contains no @ and no . it might be a local user
4060 or it might be a single-component name. Treat as a domain. */
4062 if (Ustrchr(s1, '@') == NULL && Ustrchr(s1, '.') == NULL)
4064 printf("Warning: \"%s\" contains no '@' and no '.' characters. It is "
4065 "being \ntreated as a one-component domain, not as a local part.\n\n",
4069 /* There may be an optional second domain arg. */
4071 if (test_retry_arg < argc && Ustrchr(argv[test_retry_arg], '.') != NULL)
4072 s2 = argv[test_retry_arg++];
4074 /* The final arg is an error name */
4076 if (test_retry_arg < argc)
4078 uschar *ss = argv[test_retry_arg];
4080 readconf_retry_error(ss, ss + Ustrlen(ss), &basic_errno, &more_errno);
4083 printf("%s\n", CS error);
4084 return EXIT_FAILURE;
4087 /* For the {MAIL,RCPT,DATA}_4xx errors, a value of 255 means "any", and a
4088 code > 100 as an error is for matching codes to the decade. Turn them into
4089 a real error code, off the decade. */
4091 if (basic_errno == ERRNO_MAIL4XX ||
4092 basic_errno == ERRNO_RCPT4XX ||
4093 basic_errno == ERRNO_DATA4XX)
4095 int code = (more_errno >> 8) & 255;
4097 more_errno = (more_errno & 0xffff00ff) | (21 << 8);
4098 else if (code > 100)
4099 more_errno = (more_errno & 0xffff00ff) | ((code - 96) << 8);
4103 yield = retry_find_config(s1, s2, basic_errno, more_errno);
4104 if (yield == NULL) printf("No retry information found\n"); else
4107 more_errno = yield->more_errno;
4108 printf("Retry rule: %s ", yield->pattern);
4110 if (yield->basic_errno == ERRNO_EXIMQUOTA)
4112 printf("quota%s%s ",
4113 (more_errno > 0)? "_" : "",
4114 (more_errno > 0)? readconf_printtime(more_errno) : US"");
4116 else if (yield->basic_errno == ECONNREFUSED)
4118 printf("refused%s%s ",
4119 (more_errno > 0)? "_" : "",
4120 (more_errno == 'M')? "MX" :
4121 (more_errno == 'A')? "A" : "");
4123 else if (yield->basic_errno == ETIMEDOUT)
4126 if ((more_errno & RTEF_CTOUT) != 0) printf("_connect");
4128 if (more_errno != 0) printf("_%s",
4129 (more_errno == 'M')? "MX" : "A");
4132 else if (yield->basic_errno == ERRNO_AUTHFAIL)
4133 printf("auth_failed ");
4136 for (r = yield->rules; r != NULL; r = r->next)
4138 printf("%c,%s", r->rule, readconf_printtime(r->timeout)); /* Do not */
4139 printf(",%s", readconf_printtime(r->p1)); /* amalgamate */
4145 printf(",%d.", x/1000);
4159 exim_exit(EXIT_SUCCESS);
4162 /* Handle a request to list one or more configuration options */
4166 set_process_info("listing variables");
4167 if (recipients_arg >= argc) readconf_print(US"all", NULL);
4168 else for (i = recipients_arg; i < argc; i++)
4171 (Ustrcmp(argv[i], "router") == 0 ||
4172 Ustrcmp(argv[i], "transport") == 0 ||
4173 Ustrcmp(argv[i], "authenticator") == 0 ||
4174 Ustrcmp(argv[i], "macro") == 0))
4176 readconf_print(argv[i+1], argv[i]);
4179 else readconf_print(argv[i], NULL);
4181 exim_exit(EXIT_SUCCESS);
4185 /* Handle a request to deliver one or more messages that are already on the
4186 queue. Values of msg_action other than MSG_DELIVER and MSG_LOAD are dealt with
4187 above. MSG_LOAD is handled with -be (which is the only time it applies) below.
4189 Delivery of specific messages is typically used for a small number when
4190 prodding by hand (when the option forced_delivery will be set) or when
4191 re-execing to regain root privilege. Each message delivery must happen in a
4192 separate process, so we fork a process for each one, and run them sequentially
4193 so that debugging output doesn't get intertwined, and to avoid spawning too
4194 many processes if a long list is given. However, don't fork for the last one;
4195 this saves a process in the common case when Exim is called to deliver just one
4198 if (msg_action_arg > 0 && msg_action != MSG_LOAD)
4200 if (prod_requires_admin && !admin_user)
4202 fprintf(stderr, "exim: Permission denied\n");
4203 exim_exit(EXIT_FAILURE);
4205 set_process_info("delivering specified messages");
4206 if (deliver_give_up) forced_delivery = deliver_force_thaw = TRUE;
4207 for (i = msg_action_arg; i < argc; i++)
4212 (void)deliver_message(argv[i], forced_delivery, deliver_give_up);
4213 else if ((pid = fork()) == 0)
4215 (void)deliver_message(argv[i], forced_delivery, deliver_give_up);
4216 _exit(EXIT_SUCCESS);
4220 fprintf(stderr, "failed to fork delivery process for %s: %s\n", argv[i],
4222 exim_exit(EXIT_FAILURE);
4226 exim_exit(EXIT_SUCCESS);
4230 /* If only a single queue run is requested, without SMTP listening, we can just
4231 turn into a queue runner, with an optional starting message id. */
4233 if (queue_interval == 0 && !daemon_listen)
4235 DEBUG(D_queue_run) debug_printf("Single queue run%s%s%s%s\n",
4236 (start_queue_run_id == NULL)? US"" : US" starting at ",
4237 (start_queue_run_id == NULL)? US"" : start_queue_run_id,
4238 (stop_queue_run_id == NULL)? US"" : US" stopping at ",
4239 (stop_queue_run_id == NULL)? US"" : stop_queue_run_id);
4240 set_process_info("running the queue (single queue run)");
4241 queue_run(start_queue_run_id, stop_queue_run_id, FALSE);
4242 exim_exit(EXIT_SUCCESS);
4246 /* Find the login name of the real user running this process. This is always
4247 needed when receiving a message, because it is written into the spool file. It
4248 may also be used to construct a from: or a sender: header, and in this case we
4249 need the user's full name as well, so save a copy of it, checked for RFC822
4250 syntax and munged if necessary, if it hasn't previously been set by the -F
4251 argument. We may try to get the passwd entry more than once, in case NIS or
4252 other delays are in evidence. Save the home directory for use in filter testing
4257 if ((pw = getpwuid(real_uid)) != NULL)
4259 originator_login = string_copy(US pw->pw_name);
4260 originator_home = string_copy(US pw->pw_dir);
4262 /* If user name has not been set by -F, set it from the passwd entry
4263 unless -f has been used to set the sender address by a trusted user. */
4265 if (originator_name == NULL)
4267 if (sender_address == NULL ||
4268 (!trusted_caller && filter_test == FTEST_NONE))
4270 uschar *name = US pw->pw_gecos;
4271 uschar *amp = Ustrchr(name, '&');
4274 /* Most Unix specify that a '&' character in the gecos field is
4275 replaced by a copy of the login name, and some even specify that
4276 the first character should be upper cased, so that's what we do. */
4281 string_format(buffer, sizeof(buffer), "%.*s%n%s%s",
4282 amp - name, name, &loffset, originator_login, amp + 1);
4283 buffer[loffset] = toupper(buffer[loffset]);
4287 /* If a pattern for matching the gecos field was supplied, apply
4288 it and then expand the name string. */
4290 if (gecos_pattern != NULL && gecos_name != NULL)
4293 re = regex_must_compile(gecos_pattern, FALSE, TRUE); /* Use malloc */
4295 if (regex_match_and_setup(re, name, 0, -1))
4297 uschar *new_name = expand_string(gecos_name);
4299 if (new_name != NULL)
4301 DEBUG(D_receive) debug_printf("user name \"%s\" extracted from "
4302 "gecos field \"%s\"\n", new_name, name);
4305 else DEBUG(D_receive) debug_printf("failed to expand gecos_name string "
4306 "\"%s\": %s\n", gecos_name, expand_string_message);
4308 else DEBUG(D_receive) debug_printf("gecos_pattern \"%s\" did not match "
4309 "gecos field \"%s\"\n", gecos_pattern, name);
4310 store_free((void *)re);
4312 originator_name = string_copy(name);
4315 /* A trusted caller has used -f but not -F */
4317 else originator_name = US"";
4320 /* Break the retry loop */
4325 if (++i > finduser_retries) break;
4329 /* If we cannot get a user login, log the incident and give up, unless the
4330 configuration specifies something to use. When running in the test harness,
4331 any setting of unknown_login overrides the actual name. */
4333 if (originator_login == NULL || running_in_test_harness)
4335 if (unknown_login != NULL)
4337 originator_login = expand_string(unknown_login);
4338 if (originator_name == NULL && unknown_username != NULL)
4339 originator_name = expand_string(unknown_username);
4340 if (originator_name == NULL) originator_name = US"";
4342 if (originator_login == NULL)
4343 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Failed to get user name for uid %d",
4347 /* Ensure that the user name is in a suitable form for use as a "phrase" in an
4350 originator_name = string_copy(parse_fix_phrase(originator_name,
4351 Ustrlen(originator_name), big_buffer, big_buffer_size));
4353 /* If a message is created by this call of Exim, the uid/gid of its originator
4354 are those of the caller. These values are overridden if an existing message is
4355 read in from the spool. */
4357 originator_uid = real_uid;
4358 originator_gid = real_gid;
4360 DEBUG(D_receive) debug_printf("originator: uid=%d gid=%d login=%s name=%s\n",
4361 (int)originator_uid, (int)originator_gid, originator_login, originator_name);
4363 /* Run in daemon and/or queue-running mode. The function daemon_go() never
4364 returns. We leave this till here so that the originator_ fields are available
4365 for incoming messages via the daemon. The daemon cannot be run in mua_wrapper
4368 if (daemon_listen || queue_interval > 0)
4372 fprintf(stderr, "Daemon cannot be run when mua_wrapper is set\n");
4373 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Daemon cannot be run when "
4374 "mua_wrapper is set");
4379 /* If the sender ident has not been set (by a trusted caller) set it to
4380 the caller. This will get overwritten below for an inetd call. If a trusted
4381 caller has set it empty, unset it. */
4383 if (sender_ident == NULL) sender_ident = originator_login;
4384 else if (sender_ident[0] == 0) sender_ident = NULL;
4386 /* Handle the -brw option, which is for checking out rewriting rules. Cause log
4387 writes (on errors) to go to stderr instead. Can't do this earlier, as want the
4388 originator_* variables set. */
4390 if (test_rewrite_arg >= 0)
4392 really_exim = FALSE;
4393 if (test_rewrite_arg >= argc)
4395 printf("-brw needs an address argument\n");
4396 exim_exit(EXIT_FAILURE);
4398 rewrite_test(argv[test_rewrite_arg]);
4399 exim_exit(EXIT_SUCCESS);
4402 /* A locally-supplied message is considered to be coming from a local user
4403 unless a trusted caller supplies a sender address with -f, or is passing in the
4404 message via SMTP (inetd invocation or otherwise). */
4406 if ((sender_address == NULL && !smtp_input) ||
4407 (!trusted_caller && filter_test == FTEST_NONE))
4409 sender_local = TRUE;
4411 /* A trusted caller can supply authenticated_sender and authenticated_id
4412 via -oMas and -oMai and if so, they will already be set. Otherwise, force
4413 defaults except when host checking. */
4415 if (authenticated_sender == NULL && !host_checking)
4416 authenticated_sender = string_sprintf("%s@%s", originator_login,
4417 qualify_domain_sender);
4418 if (authenticated_id == NULL && !host_checking)
4419 authenticated_id = originator_login;
4422 /* Trusted callers are always permitted to specify the sender address.
4423 Untrusted callers may specify it if it matches untrusted_set_sender, or if what
4424 is specified is the empty address. However, if a trusted caller does not
4425 specify a sender address for SMTP input, we leave sender_address unset. This
4426 causes the MAIL commands to be honoured. */
4428 if ((!smtp_input && sender_address == NULL) ||
4429 !receive_check_set_sender(sender_address))
4431 /* Either the caller is not permitted to set a general sender, or this is
4432 non-SMTP input and the trusted caller has not set a sender. If there is no
4433 sender, or if a sender other than <> is set, override with the originator's
4434 login (which will get qualified below), except when checking things. */
4436 if (sender_address == NULL /* No sender_address set */
4438 (sender_address[0] != 0 && /* Non-empty sender address, AND */
4439 !checking && /* Not running tests, AND */
4440 filter_test == FTEST_NONE)) /* Not testing a filter */
4442 sender_address = originator_login;
4443 sender_address_forced = FALSE;
4444 sender_address_domain = 0;
4448 /* Remember whether an untrusted caller set the sender address */
4450 sender_set_untrusted = sender_address != originator_login && !trusted_caller;
4452 /* Ensure that the sender address is fully qualified unless it is the empty
4453 address, which indicates an error message, or doesn't exist (root caller, smtp
4454 interface, no -f argument). */
4456 if (sender_address != NULL && sender_address[0] != 0 &&
4457 sender_address_domain == 0)
4458 sender_address = string_sprintf("%s@%s", local_part_quote(sender_address),
4459 qualify_domain_sender);
4461 DEBUG(D_receive) debug_printf("sender address = %s\n", sender_address);
4463 /* Handle a request to verify a list of addresses, or test them for delivery.
4464 This must follow the setting of the sender address, since routers can be
4465 predicated upon the sender. If no arguments are given, read addresses from
4466 stdin. Set debug_level to at least D_v to get full output for address testing.
4469 if (verify_address_mode || address_test_mode)
4472 int flags = vopt_qualify;
4474 if (verify_address_mode)
4476 if (!verify_as_sender) flags |= vopt_is_recipient;
4477 DEBUG(D_verify) debug_print_ids(US"Verifying:");
4482 flags |= vopt_is_recipient;
4483 debug_selector |= D_v;
4484 debug_file = stderr;
4485 debug_fd = fileno(debug_file);
4486 DEBUG(D_verify) debug_print_ids(US"Address testing:");
4489 if (recipients_arg < argc)
4491 while (recipients_arg < argc)
4493 uschar *s = argv[recipients_arg++];
4496 BOOL finished = FALSE;
4497 uschar *ss = parse_find_address_end(s, FALSE);
4498 if (*ss == ',') *ss = 0; else finished = TRUE;
4499 test_address(s, flags, &exit_value);
4502 while (*(++s) != 0 && (*s == ',' || isspace(*s)));
4509 uschar *s = get_stdinput(NULL, NULL);
4510 if (s == NULL) break;
4511 test_address(s, flags, &exit_value);
4515 exim_exit(exit_value);
4518 /* Handle expansion checking. Either expand items on the command line, or read
4519 from stdin if there aren't any. If -Mset was specified, load the message so
4520 that its variables can be used, but restrict this facility to admin users.
4521 Otherwise, if -bem was used, read a message from stdin. */
4525 if (msg_action_arg > 0 && msg_action == MSG_LOAD)
4527 uschar spoolname[256]; /* Not big_buffer; used in spool_read_header() */
4530 fprintf(stderr, "exim: permission denied\n");
4533 message_id = argv[msg_action_arg];
4534 (void)string_format(spoolname, sizeof(spoolname), "%s-H", message_id);
4535 if (!spool_open_datafile(message_id))
4536 printf ("Failed to load message datafile %s\n", message_id);
4537 if (spool_read_header(spoolname, TRUE, FALSE) != spool_read_OK)
4538 printf ("Failed to load message %s\n", message_id);
4541 /* Read a test message from a file. We fudge it up to be on stdin, saving
4542 stdin itself for later reading of expansion strings. */
4544 else if (expansion_test_message != NULL)
4546 int save_stdin = dup(0);
4547 int fd = Uopen(expansion_test_message, O_RDONLY, 0);
4550 fprintf(stderr, "exim: failed to open %s: %s\n", expansion_test_message,
4552 return EXIT_FAILURE;
4555 filter_test = FTEST_USER; /* Fudge to make it look like filter test */
4556 message_ended = END_NOTENDED;
4557 read_message_body(receive_msg(extract_recipients));
4558 message_linecount += body_linecount;
4559 (void)dup2(save_stdin, 0);
4560 (void)close(save_stdin);
4561 clearerr(stdin); /* Required by Darwin */
4564 /* Allow $recipients for this testing */
4566 enable_dollar_recipients = TRUE;
4568 /* Expand command line items */
4570 if (recipients_arg < argc)
4572 while (recipients_arg < argc)
4574 uschar *s = argv[recipients_arg++];
4575 uschar *ss = expand_string(s);
4576 if (ss == NULL) printf ("Failed: %s\n", expand_string_message);
4577 else printf("%s\n", CS ss);
4585 char *(*fn_readline)(const char *) = NULL;
4586 void (*fn_addhist)(const char *) = NULL;
4589 void *dlhandle = set_readline(&fn_readline, &fn_addhist);
4595 uschar *source = get_stdinput(fn_readline, fn_addhist);
4596 if (source == NULL) break;
4597 ss = expand_string(source);
4599 printf ("Failed: %s\n", expand_string_message);
4600 else printf("%s\n", CS ss);
4604 if (dlhandle != NULL) dlclose(dlhandle);
4608 /* The data file will be open after -Mset */
4610 if (deliver_datafile >= 0)
4612 (void)close(deliver_datafile);
4613 deliver_datafile = -1;
4616 exim_exit(EXIT_SUCCESS);
4620 /* The active host name is normally the primary host name, but it can be varied
4621 for hosts that want to play several parts at once. We need to ensure that it is
4622 set for host checking, and for receiving messages. */
4624 smtp_active_hostname = primary_hostname;
4625 if (raw_active_hostname != NULL)
4627 uschar *nah = expand_string(raw_active_hostname);
4630 if (!expand_string_forcedfail)
4631 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to expand \"%s\" "
4632 "(smtp_active_hostname): %s", raw_active_hostname,
4633 expand_string_message);
4635 else if (nah[0] != 0) smtp_active_hostname = nah;
4638 /* Handle host checking: this facility mocks up an incoming SMTP call from a
4639 given IP address so that the blocking and relay configuration can be tested.
4640 Unless a sender_ident was set by -oMt, we discard it (the default is the
4641 caller's login name). An RFC 1413 call is made only if we are running in the
4642 test harness and an incoming interface and both ports are specified, because
4643 there is no TCP/IP call to find the ident for. */
4650 if (!sender_ident_set)
4652 sender_ident = NULL;
4653 if (running_in_test_harness && sender_host_port != 0 &&
4654 interface_address != NULL && interface_port != 0)
4655 verify_get_ident(1413);
4658 /* In case the given address is a non-canonical IPv6 address, canonicize
4659 it. The code works for both IPv4 and IPv6, as it happens. */
4661 size = host_aton(sender_host_address, x);
4662 sender_host_address = store_get(48); /* large enough for full IPv6 */
4663 (void)host_nmtoa(size, x, -1, sender_host_address, ':');
4665 /* Now set up for testing */
4667 host_build_sender_fullhost();
4671 sender_local = FALSE;
4672 sender_host_notsocket = TRUE;
4673 debug_file = stderr;
4674 debug_fd = fileno(debug_file);
4675 fprintf(stdout, "\n**** SMTP testing session as if from host %s\n"
4676 "**** but without any ident (RFC 1413) callback.\n"
4677 "**** This is not for real!\n\n",
4678 sender_host_address);
4680 if (verify_check_host(&hosts_connection_nolog) == OK)
4681 log_write_selector &= ~L_smtp_connection;
4682 log_write(L_smtp_connection, LOG_MAIN, "%s", smtp_get_connection_info());
4684 /* NOTE: We do *not* call smtp_log_no_mail() if smtp_start_session() fails,
4685 because a log line has already been written for all its failure exists
4686 (usually "connection refused: <reason>") and writing another one is
4687 unnecessary clutter. */
4689 if (smtp_start_session())
4691 reset_point = store_get(0);
4694 store_reset(reset_point);
4695 if (smtp_setup_msg() <= 0) break;
4696 if (!receive_msg(FALSE)) break;
4700 exim_exit(EXIT_SUCCESS);
4704 /* Arrange for message reception if recipients or SMTP were specified;
4705 otherwise complain unless a version print (-bV) happened or this is a filter
4706 verification test. In the former case, show the configuration file name. */
4708 if (recipients_arg >= argc && !extract_recipients && !smtp_input)
4710 if (version_printed)
4712 printf("Configuration file is %s\n", config_main_filename);
4713 return EXIT_SUCCESS;
4716 if (filter_test == FTEST_NONE)
4717 exim_usage(called_as);
4721 /* If mua_wrapper is set, Exim is being used to turn an MUA that submits on the
4722 standard input into an MUA that submits to a smarthost over TCP/IP. We know
4723 that we are not called from inetd, because that is rejected above. The
4724 following configuration settings are forced here:
4726 (1) Synchronous delivery (-odi)
4727 (2) Errors to stderr (-oep == -oeq)
4728 (3) No parallel remote delivery
4729 (4) Unprivileged delivery
4731 We don't force overall queueing options because there are several of them;
4732 instead, queueing is avoided below when mua_wrapper is set. However, we do need
4733 to override any SMTP queueing. */
4737 synchronous_delivery = TRUE;
4738 arg_error_handling = ERRORS_STDERR;
4739 remote_max_parallel = 1;
4740 deliver_drop_privilege = TRUE;
4742 queue_smtp_domains = NULL;
4746 /* Prepare to accept one or more new messages on the standard input. When a
4747 message has been read, its id is returned in message_id[]. If doing immediate
4748 delivery, we fork a delivery process for each received message, except for the
4749 last one, where we can save a process switch.
4751 It is only in non-smtp mode that error_handling is allowed to be changed from
4752 its default of ERRORS_SENDER by argument. (Idle thought: are any of the
4753 sendmail error modes other than -oem ever actually used? Later: yes.) */
4755 if (!smtp_input) error_handling = arg_error_handling;
4757 /* If this is an inetd call, ensure that stderr is closed to prevent panic
4758 logging being sent down the socket and make an identd call to get the
4763 (void)fclose(stderr);
4764 exim_nullstd(); /* Re-open to /dev/null */
4765 verify_get_ident(IDENT_PORT);
4766 host_build_sender_fullhost();
4767 set_process_info("handling incoming connection from %s via inetd",
4771 /* If the sender host address has been set, build sender_fullhost if it hasn't
4772 already been done (which it will have been for inetd). This caters for the
4773 case when it is forced by -oMa. However, we must flag that it isn't a socket,
4774 so that the test for IP options is skipped for -bs input. */
4776 if (sender_host_address != NULL && sender_fullhost == NULL)
4778 host_build_sender_fullhost();
4779 set_process_info("handling incoming connection from %s via -oMa",
4781 sender_host_notsocket = TRUE;
4784 /* Otherwise, set the sender host as unknown except for inetd calls. This
4785 prevents host checking in the case of -bs not from inetd and also for -bS. */
4787 else if (!is_inetd) sender_host_unknown = TRUE;
4789 /* If stdout does not exist, then dup stdin to stdout. This can happen
4790 if exim is started from inetd. In this case fd 0 will be set to the socket,
4791 but fd 1 will not be set. This also happens for passed SMTP channels. */
4793 if (fstat(1, &statbuf) < 0) (void)dup2(0, 1);
4795 /* Set up the incoming protocol name and the state of the program. Root is
4796 allowed to force received protocol via the -oMr option above. If we have come
4797 via inetd, the process info has already been set up. We don't set
4798 received_protocol here for smtp input, as it varies according to
4799 batch/HELO/EHLO/AUTH/TLS. */
4803 if (!is_inetd) set_process_info("accepting a local %sSMTP message from <%s>",
4804 smtp_batched_input? "batched " : "",
4805 (sender_address!= NULL)? sender_address : originator_login);
4809 if (received_protocol == NULL)
4810 received_protocol = string_sprintf("local%s", called_as);
4811 set_process_info("accepting a local non-SMTP message from <%s>",
4815 /* Initialize the session_local_queue-only flag (this will be ignored if
4816 mua_wrapper is set) */
4819 session_local_queue_only = queue_only;
4821 /* For non-SMTP and for batched SMTP input, check that there is enough space on
4822 the spool if so configured. On failure, we must not attempt to send an error
4823 message! (For interactive SMTP, the check happens at MAIL FROM and an SMTP
4824 error code is given.) */
4826 if ((!smtp_input || smtp_batched_input) && !receive_check_fs(0))
4828 fprintf(stderr, "exim: insufficient disk space\n");
4829 return EXIT_FAILURE;
4832 /* If this is smtp input of any kind, real or batched, handle the start of the
4835 NOTE: We do *not* call smtp_log_no_mail() if smtp_start_session() fails,
4836 because a log line has already been written for all its failure exists
4837 (usually "connection refused: <reason>") and writing another one is
4838 unnecessary clutter. */
4844 if (verify_check_host(&hosts_connection_nolog) == OK)
4845 log_write_selector &= ~L_smtp_connection;
4846 log_write(L_smtp_connection, LOG_MAIN, "%s", smtp_get_connection_info());
4847 if (!smtp_start_session())
4850 exim_exit(EXIT_SUCCESS);
4854 /* Otherwise, set up the input size limit here. */
4858 thismessage_size_limit = expand_string_integer(message_size_limit, TRUE);
4859 if (expand_string_message != NULL)
4861 if (thismessage_size_limit == -1)
4862 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to expand "
4863 "message_size_limit: %s", expand_string_message);
4865 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "invalid value for "
4866 "message_size_limit: %s", expand_string_message);
4870 /* Loop for several messages when reading SMTP input. If we fork any child
4871 processes, we don't want to wait for them unless synchronous delivery is
4872 requested, so set SIGCHLD to SIG_IGN in that case. This is not necessarily the
4873 same as SIG_DFL, despite the fact that documentation often lists the default as
4874 "ignore". This is a confusing area. This is what I know:
4876 At least on some systems (e.g. Solaris), just setting SIG_IGN causes child
4877 processes that complete simply to go away without ever becoming defunct. You
4878 can't then wait for them - but we don't want to wait for them in the
4879 non-synchronous delivery case. However, this behaviour of SIG_IGN doesn't
4880 happen for all OS (e.g. *BSD is different).
4882 But that's not the end of the story. Some (many? all?) systems have the
4883 SA_NOCLDWAIT option for sigaction(). This requests the behaviour that Solaris
4884 has by default, so it seems that the difference is merely one of default
4885 (compare restarting vs non-restarting signals).
4887 To cover all cases, Exim sets SIG_IGN with SA_NOCLDWAIT here if it can. If not,
4888 it just sets SIG_IGN. To be on the safe side it also calls waitpid() at the end
4889 of the loop below. Paranoia rules.
4891 February 2003: That's *still* not the end of the story. There are now versions
4892 of Linux (where SIG_IGN does work) that are picky. If, having set SIG_IGN, a
4893 process then calls waitpid(), a grumble is written to the system log, because
4894 this is logically inconsistent. In other words, it doesn't like the paranoia.
4895 As a consequenc of this, the waitpid() below is now excluded if we are sure
4896 that SIG_IGN works. */
4898 if (!synchronous_delivery)
4901 struct sigaction act;
4902 act.sa_handler = SIG_IGN;
4903 sigemptyset(&(act.sa_mask));
4904 act.sa_flags = SA_NOCLDWAIT;
4905 sigaction(SIGCHLD, &act, NULL);
4907 signal(SIGCHLD, SIG_IGN);
4911 /* Save the current store pool point, for resetting at the start of
4912 each message, and save the real sender address, if any. */
4914 reset_point = store_get(0);
4915 real_sender_address = sender_address;
4917 /* Loop to receive messages; receive_msg() returns TRUE if there are more
4918 messages to be read (SMTP input), or FALSE otherwise (not SMTP, or SMTP channel
4923 store_reset(reset_point);
4926 /* Handle the SMTP case; call smtp_setup_mst() to deal with the initial SMTP
4927 input and build the recipients list, before calling receive_msg() to read the
4928 message proper. Whatever sender address is given in the SMTP transaction is
4929 often ignored for local senders - we use the actual sender, which is normally
4930 either the underlying user running this process or a -f argument provided by
4931 a trusted caller. It is saved in real_sender_address. The test for whether to
4932 accept the SMTP sender is encapsulated in receive_check_set_sender(). */
4937 if ((rc = smtp_setup_msg()) > 0)
4939 if (real_sender_address != NULL &&
4940 !receive_check_set_sender(sender_address))
4942 sender_address = raw_sender = real_sender_address;
4943 sender_address_unrewritten = NULL;
4946 /* For batched SMTP, we have to run the acl_not_smtp_start ACL, since it
4947 isn't really SMTP, so no other ACL will run until the acl_not_smtp one at
4948 the very end. The result of the ACL is ignored (as for other non-SMTP
4949 messages). It is run for its potential side effects. */
4951 if (smtp_batched_input && acl_not_smtp_start != NULL)
4953 uschar *user_msg, *log_msg;
4954 enable_dollar_recipients = TRUE;
4955 (void)acl_check(ACL_WHERE_NOTSMTP_START, NULL, acl_not_smtp_start,
4956 &user_msg, &log_msg);
4957 enable_dollar_recipients = FALSE;
4960 /* Now get the data for the message */
4962 more = receive_msg(extract_recipients);
4963 if (message_id[0] == 0)
4966 smtp_log_no_mail(); /* Log no mail if configured */
4967 exim_exit(EXIT_FAILURE);
4972 smtp_log_no_mail(); /* Log no mail if configured */
4973 exim_exit((rc == 0)? EXIT_SUCCESS : EXIT_FAILURE);
4977 /* In the non-SMTP case, we have all the information from the command
4978 line, but must process it in case it is in the more general RFC822
4979 format, and in any case, to detect syntax errors. Also, it appears that
4980 the use of comma-separated lists as single arguments is common, so we
4981 had better support them. */
4987 int count = argc - recipients_arg;
4988 uschar **list = argv + recipients_arg;
4990 /* These options cannot be changed dynamically for non-SMTP messages */
4992 active_local_sender_retain = local_sender_retain;
4993 active_local_from_check = local_from_check;
4995 /* Save before any rewriting */
4997 raw_sender = string_copy(sender_address);
4999 /* Loop for each argument */
5001 for (i = 0; i < count; i++)
5003 int start, end, domain;
5005 uschar *s = list[i];
5007 /* Loop for each comma-separated address */
5011 BOOL finished = FALSE;
5013 uschar *ss = parse_find_address_end(s, FALSE);
5015 if (*ss == ',') *ss = 0; else finished = TRUE;
5017 /* Check max recipients - if -t was used, these aren't recipients */
5019 if (recipients_max > 0 && ++rcount > recipients_max &&
5020 !extract_recipients)
5022 if (error_handling == ERRORS_STDERR)
5024 fprintf(stderr, "exim: too many recipients\n");
5025 exim_exit(EXIT_FAILURE);
5030 moan_to_sender(ERRMESS_TOOMANYRECIP, NULL, NULL, stdin, TRUE)?
5031 errors_sender_rc : EXIT_FAILURE;
5036 parse_extract_address(s, &errmess, &start, &end, &domain, FALSE);
5038 if (domain == 0 && !allow_unqualified_recipient)
5041 errmess = US"unqualified recipient address not allowed";
5044 if (recipient == NULL)
5046 if (error_handling == ERRORS_STDERR)
5048 fprintf(stderr, "exim: bad recipient address \"%s\": %s\n",
5049 string_printing(list[i]), errmess);
5050 exim_exit(EXIT_FAILURE);
5056 eblock.text1 = string_printing(list[i]);
5057 eblock.text2 = errmess;
5059 moan_to_sender(ERRMESS_BADARGADDRESS, &eblock, NULL, stdin, TRUE)?
5060 errors_sender_rc : EXIT_FAILURE;
5064 receive_add_recipient(recipient, -1);
5067 while (*(++s) != 0 && (*s == ',' || isspace(*s)));
5071 /* Show the recipients when debugging */
5076 if (sender_address != NULL) debug_printf("Sender: %s\n", sender_address);
5077 if (recipients_list != NULL)
5079 debug_printf("Recipients:\n");
5080 for (i = 0; i < recipients_count; i++)
5081 debug_printf(" %s\n", recipients_list[i].address);
5085 /* Run the acl_not_smtp_start ACL if required. The result of the ACL is
5086 ignored; rejecting here would just add complication, and it can just as
5087 well be done later. Allow $recipients to be visible in the ACL. */
5089 if (acl_not_smtp_start != NULL)
5091 uschar *user_msg, *log_msg;
5092 enable_dollar_recipients = TRUE;
5093 (void)acl_check(ACL_WHERE_NOTSMTP_START, NULL, acl_not_smtp_start,
5094 &user_msg, &log_msg);
5095 enable_dollar_recipients = FALSE;
5098 /* Read the data for the message. If filter_test is not FTEST_NONE, this
5099 will just read the headers for the message, and not write anything onto the
5102 message_ended = END_NOTENDED;
5103 more = receive_msg(extract_recipients);
5105 /* more is always FALSE here (not SMTP message) when reading a message
5106 for real; when reading the headers of a message for filter testing,
5107 it is TRUE if the headers were terminated by '.' and FALSE otherwise. */
5109 if (message_id[0] == 0) exim_exit(EXIT_FAILURE);
5110 } /* Non-SMTP message reception */
5112 /* If this is a filter testing run, there are headers in store, but
5113 no message on the spool. Run the filtering code in testing mode, setting
5114 the domain to the qualify domain and the local part to the current user,
5115 unless they have been set by options. The prefix and suffix are left unset
5116 unless specified. The the return path is set to to the sender unless it has
5117 already been set from a return-path header in the message. */
5119 if (filter_test != FTEST_NONE)
5121 deliver_domain = (ftest_domain != NULL)?
5122 ftest_domain : qualify_domain_recipient;
5123 deliver_domain_orig = deliver_domain;
5124 deliver_localpart = (ftest_localpart != NULL)?
5125 ftest_localpart : originator_login;
5126 deliver_localpart_orig = deliver_localpart;
5127 deliver_localpart_prefix = ftest_prefix;
5128 deliver_localpart_suffix = ftest_suffix;
5129 deliver_home = originator_home;
5131 if (return_path == NULL)
5133 printf("Return-path copied from sender\n");
5134 return_path = string_copy(sender_address);
5138 printf("Return-path = %s\n", (return_path[0] == 0)? US"<>" : return_path);
5140 printf("Sender = %s\n", (sender_address[0] == 0)? US"<>" : sender_address);
5142 receive_add_recipient(
5143 string_sprintf("%s%s%s@%s",
5144 (ftest_prefix == NULL)? US"" : ftest_prefix,
5146 (ftest_suffix == NULL)? US"" : ftest_suffix,
5147 deliver_domain), -1);
5149 printf("Recipient = %s\n", recipients_list[0].address);
5150 if (ftest_prefix != NULL) printf("Prefix = %s\n", ftest_prefix);
5151 if (ftest_suffix != NULL) printf("Suffix = %s\n", ftest_suffix);
5153 (void)chdir("/"); /* Get away from wherever the user is running this from */
5155 /* Now we run either a system filter test, or a user filter test, or both.
5156 In the latter case, headers added by the system filter will persist and be
5157 available to the user filter. We need to copy the filter variables
5160 if ((filter_test & FTEST_SYSTEM) != 0)
5162 if (!filter_runtest(filter_sfd, filter_test_sfile, TRUE, more))
5163 exim_exit(EXIT_FAILURE);
5166 memcpy(filter_sn, filter_n, sizeof(filter_sn));
5168 if ((filter_test & FTEST_USER) != 0)
5170 if (!filter_runtest(filter_ufd, filter_test_ufile, FALSE, more))
5171 exim_exit(EXIT_FAILURE);
5174 exim_exit(EXIT_SUCCESS);
5177 /* Else act on the result of message reception. We should not get here unless
5178 message_id[0] is non-zero. If queue_only is set, session_local_queue_only
5179 will be TRUE. If it is not, check on the number of messages received in this
5182 if (!session_local_queue_only &&
5183 smtp_accept_queue_per_connection > 0 &&
5184 receive_messagecount > smtp_accept_queue_per_connection)
5186 session_local_queue_only = TRUE;
5187 queue_only_reason = 2;
5190 /* Initialize local_queue_only from session_local_queue_only. If it is false,
5191 and queue_only_load is set, check that the load average is below it. If it is
5192 not, set local_queue_only TRUE. If queue_only_load_latch is true (the
5193 default), we put the whole session into queue_only mode. It then remains this
5194 way for any subsequent messages on the same SMTP connection. This is a
5195 deliberate choice; even though the load average may fall, it doesn't seem
5196 right to deliver later messages on the same call when not delivering earlier
5197 ones. However, there are odd cases where this is not wanted, so this can be
5198 changed by setting queue_only_load_latch false. */
5200 local_queue_only = session_local_queue_only;
5201 if (!local_queue_only && queue_only_load >= 0)
5203 local_queue_only = (load_average = OS_GETLOADAVG()) > queue_only_load;
5204 if (local_queue_only)
5206 queue_only_reason = 3;
5207 if (queue_only_load_latch) session_local_queue_only = TRUE;
5211 /* If running as an MUA wrapper, all queueing options and freezing options
5215 local_queue_only = queue_only_policy = deliver_freeze = FALSE;
5217 /* Log the queueing here, when it will get a message id attached, but
5218 not if queue_only is set (case 0). Case 1 doesn't happen here (too many
5221 if (local_queue_only) switch(queue_only_reason)
5224 log_write(L_delay_delivery,
5225 LOG_MAIN, "no immediate delivery: more than %d messages "
5226 "received in one connection", smtp_accept_queue_per_connection);
5230 log_write(L_delay_delivery,
5231 LOG_MAIN, "no immediate delivery: load average %.2f",
5232 (double)load_average/1000.0);
5236 /* Else do the delivery unless the ACL or local_scan() called for queue only
5237 or froze the message. Always deliver in a separate process. A fork failure is
5238 not a disaster, as the delivery will eventually happen on a subsequent queue
5239 run. The search cache must be tidied before the fork, as the parent will
5240 do it before exiting. The child will trigger a lookup failure and
5241 thereby defer the delivery if it tries to use (for example) a cached ldap
5242 connection that the parent has called unbind on. */
5244 else if (!queue_only_policy && !deliver_freeze)
5249 if ((pid = fork()) == 0)
5252 close_unwanted(); /* Close unwanted file descriptors and TLS */
5253 exim_nullstd(); /* Ensure std{in,out,err} exist */
5255 /* Re-exec Exim if we need to regain privilege (note: in mua_wrapper
5256 mode, deliver_drop_privilege is forced TRUE). */
5258 if (geteuid() != root_uid && !deliver_drop_privilege && !unprivileged)
5260 (void)child_exec_exim(CEE_EXEC_EXIT, FALSE, NULL, FALSE, 2, US"-Mc",
5262 /* Control does not return here. */
5265 /* No need to re-exec */
5267 rc = deliver_message(message_id, FALSE, FALSE);
5269 _exit((!mua_wrapper || rc == DELIVER_MUA_SUCCEEDED)?
5270 EXIT_SUCCESS : EXIT_FAILURE);
5275 log_write(0, LOG_MAIN|LOG_PANIC, "failed to fork automatic delivery "
5276 "process: %s", strerror(errno));
5279 /* In the parent, wait if synchronous delivery is required. This will
5280 always be the case in MUA wrapper mode. */
5282 else if (synchronous_delivery)
5285 while (wait(&status) != pid);
5286 if ((status & 0x00ff) != 0)
5287 log_write(0, LOG_MAIN|LOG_PANIC,
5288 "process %d crashed with signal %d while delivering %s",
5289 (int)pid, status & 0x00ff, message_id);
5290 if (mua_wrapper && (status & 0xffff) != 0) exim_exit(EXIT_FAILURE);
5294 /* The loop will repeat if more is TRUE. If we do not know know that the OS
5295 automatically reaps children (see comments above the loop), clear away any
5296 finished subprocesses here, in case there are lots of messages coming in
5297 from the same source. */
5299 #ifndef SIG_IGN_WORKS
5300 while (waitpid(-1, NULL, WNOHANG) > 0);
5304 exim_exit(EXIT_SUCCESS); /* Never returns */
5305 return 0; /* To stop compiler warning */