1 /* $Cambridge: exim/src/src/exim.c,v 1.71 2010/06/07 00:12:42 pdp Exp $ */
3 /*************************************************
4 * Exim - an Internet mail transport agent *
5 *************************************************/
7 /* Copyright (c) University of Cambridge 1995 - 2009 */
8 /* See the file NOTICE for conditions of use and distribution. */
11 /* The main function: entry point, initialization, and high-level control.
12 Also a few functions that don't naturally fit elsewhere. */
17 extern void init_lookup_list(void);
21 /*************************************************
22 * Function interface to store functions *
23 *************************************************/
25 /* We need some real functions to pass to the PCRE regular expression library
26 for store allocation via Exim's store manager. The normal calls are actually
27 macros that pass over location information to make tracing easier. These
28 functions just interface to the standard macro calls. A good compiler will
29 optimize out the tail recursion and so not make them too expensive. There
30 are two sets of functions; one for use when we want to retain the compiled
31 regular expression for a long time; the other for short-term use. */
34 function_store_get(size_t size)
36 return store_get((int)size);
40 function_dummy_free(void *block) { block = block; }
43 function_store_malloc(size_t size)
45 return store_malloc((int)size);
49 function_store_free(void *block)
57 /*************************************************
58 * Compile regular expression and panic on fail *
59 *************************************************/
61 /* This function is called when failure to compile a regular expression leads
62 to a panic exit. In other cases, pcre_compile() is called directly. In many
63 cases where this function is used, the results of the compilation are to be
64 placed in long-lived store, so we temporarily reset the store management
65 functions that PCRE uses if the use_malloc flag is set.
68 pattern the pattern to compile
69 caseless TRUE if caseless matching is required
70 use_malloc TRUE if compile into malloc store
72 Returns: pointer to the compiled pattern
76 regex_must_compile(uschar *pattern, BOOL caseless, BOOL use_malloc)
79 int options = PCRE_COPT;
84 pcre_malloc = function_store_malloc;
85 pcre_free = function_store_free;
87 if (caseless) options |= PCRE_CASELESS;
88 yield = pcre_compile(CS pattern, options, (const char **)&error, &offset, NULL);
89 pcre_malloc = function_store_get;
90 pcre_free = function_dummy_free;
92 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "regular expression error: "
93 "%s at offset %d while compiling %s", error, offset, pattern);
100 /*************************************************
101 * Execute regular expression and set strings *
102 *************************************************/
104 /* This function runs a regular expression match, and sets up the pointers to
105 the matched substrings.
108 re the compiled expression
109 subject the subject string
110 options additional PCRE options
111 setup if < 0 do full setup
112 if >= 0 setup from setup+1 onwards,
113 excluding the full matched string
115 Returns: TRUE or FALSE
119 regex_match_and_setup(const pcre *re, uschar *subject, int options, int setup)
121 int ovector[3*(EXPAND_MAXN+1)];
122 int n = pcre_exec(re, NULL, CS subject, Ustrlen(subject), 0,
123 PCRE_EOPT | options, ovector, sizeof(ovector)/sizeof(int));
125 if (n == 0) n = EXPAND_MAXN + 1;
129 expand_nmax = (setup < 0)? 0 : setup + 1;
130 for (nn = (setup < 0)? 0 : 2; nn < n*2; nn += 2)
132 expand_nstring[expand_nmax] = subject + ovector[nn];
133 expand_nlength[expand_nmax++] = ovector[nn+1] - ovector[nn];
143 /*************************************************
144 * Handler for SIGUSR1 *
145 *************************************************/
147 /* SIGUSR1 causes any exim process to write to the process log details of
148 what it is currently doing. It will only be used if the OS is capable of
149 setting up a handler that causes automatic restarting of any system call
150 that is in progress at the time.
152 Argument: the signal number (SIGUSR1)
157 usr1_handler(int sig)
159 sig = sig; /* Keep picky compilers happy */
160 log_write(0, LOG_PROCESS, "%s", process_info);
162 os_restarting_signal(SIGUSR1, usr1_handler);
167 /*************************************************
169 *************************************************/
171 /* This handler is enabled most of the time that Exim is running. The handler
172 doesn't actually get used unless alarm() has been called to set a timer, to
173 place a time limit on a system call of some kind. When the handler is run, it
176 There are some other SIGALRM handlers that are used in special cases when more
177 than just a flag setting is required; for example, when reading a message's
178 input. These are normally set up in the code module that uses them, and the
179 SIGALRM handler is reset to this one afterwards.
181 Argument: the signal value (SIGALRM)
186 sigalrm_handler(int sig)
188 sig = sig; /* Keep picky compilers happy */
190 os_non_restarting_signal(SIGALRM, sigalrm_handler);
195 /*************************************************
196 * Sleep for a fractional time interval *
197 *************************************************/
199 /* This function is called by millisleep() and exim_wait_tick() to wait for a
200 period of time that may include a fraction of a second. The coding is somewhat
201 tedious. We do not expect setitimer() ever to fail, but if it does, the process
202 will wait for ever, so we panic in this instance. (There was a case of this
203 when a bug in a function that calls milliwait() caused it to pass invalid data.
204 That's when I added the check. :-)
206 Argument: an itimerval structure containing the interval
211 milliwait(struct itimerval *itval)
214 sigset_t old_sigmask;
215 (void)sigemptyset(&sigmask); /* Empty mask */
216 (void)sigaddset(&sigmask, SIGALRM); /* Add SIGALRM */
217 (void)sigprocmask(SIG_BLOCK, &sigmask, &old_sigmask); /* Block SIGALRM */
218 if (setitimer(ITIMER_REAL, itval, NULL) < 0) /* Start timer */
219 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
220 "setitimer() failed: %s", strerror(errno));
221 (void)sigfillset(&sigmask); /* All signals */
222 (void)sigdelset(&sigmask, SIGALRM); /* Remove SIGALRM */
223 (void)sigsuspend(&sigmask); /* Until SIGALRM */
224 (void)sigprocmask(SIG_SETMASK, &old_sigmask, NULL); /* Restore mask */
230 /*************************************************
231 * Millisecond sleep function *
232 *************************************************/
234 /* The basic sleep() function has a granularity of 1 second, which is too rough
235 in some cases - for example, when using an increasing delay to slow down
238 Argument: number of millseconds
245 struct itimerval itval;
246 itval.it_interval.tv_sec = 0;
247 itval.it_interval.tv_usec = 0;
248 itval.it_value.tv_sec = msec/1000;
249 itval.it_value.tv_usec = (msec % 1000) * 1000;
255 /*************************************************
256 * Compare microsecond times *
257 *************************************************/
264 Returns: -1, 0, or +1
268 exim_tvcmp(struct timeval *t1, struct timeval *t2)
270 if (t1->tv_sec > t2->tv_sec) return +1;
271 if (t1->tv_sec < t2->tv_sec) return -1;
272 if (t1->tv_usec > t2->tv_usec) return +1;
273 if (t1->tv_usec < t2->tv_usec) return -1;
280 /*************************************************
281 * Clock tick wait function *
282 *************************************************/
284 /* Exim uses a time + a pid to generate a unique identifier in two places: its
285 message IDs, and in file names for maildir deliveries. Because some OS now
286 re-use pids within the same second, sub-second times are now being used.
287 However, for absolute certaintly, we must ensure the clock has ticked before
288 allowing the relevant process to complete. At the time of implementation of
289 this code (February 2003), the speed of processors is such that the clock will
290 invariably have ticked already by the time a process has done its job. This
291 function prepares for the time when things are faster - and it also copes with
292 clocks that go backwards.
295 then_tv A timeval which was used to create uniqueness; its usec field
296 has been rounded down to the value of the resolution.
297 We want to be sure the current time is greater than this.
298 resolution The resolution that was used to divide the microseconds
299 (1 for maildir, larger for message ids)
305 exim_wait_tick(struct timeval *then_tv, int resolution)
307 struct timeval now_tv;
308 long int now_true_usec;
310 (void)gettimeofday(&now_tv, NULL);
311 now_true_usec = now_tv.tv_usec;
312 now_tv.tv_usec = (now_true_usec/resolution) * resolution;
314 if (exim_tvcmp(&now_tv, then_tv) <= 0)
316 struct itimerval itval;
317 itval.it_interval.tv_sec = 0;
318 itval.it_interval.tv_usec = 0;
319 itval.it_value.tv_sec = then_tv->tv_sec - now_tv.tv_sec;
320 itval.it_value.tv_usec = then_tv->tv_usec + resolution - now_true_usec;
322 /* We know that, overall, "now" is less than or equal to "then". Therefore, a
323 negative value for the microseconds is possible only in the case when "now"
324 is more than a second less than "then". That means that itval.it_value.tv_sec
325 is greater than zero. The following correction is therefore safe. */
327 if (itval.it_value.tv_usec < 0)
329 itval.it_value.tv_usec += 1000000;
330 itval.it_value.tv_sec -= 1;
333 DEBUG(D_transport|D_receive)
335 if (!running_in_test_harness)
337 debug_printf("tick check: %lu.%06lu %lu.%06lu\n",
338 then_tv->tv_sec, then_tv->tv_usec, now_tv.tv_sec, now_tv.tv_usec);
339 debug_printf("waiting %lu.%06lu\n", itval.it_value.tv_sec,
340 itval.it_value.tv_usec);
351 /*************************************************
352 * Set up processing details *
353 *************************************************/
355 /* Save a text string for dumping when SIGUSR1 is received.
356 Do checks for overruns.
358 Arguments: format and arguments, as for printf()
363 set_process_info(char *format, ...)
367 sprintf(CS process_info, "%5d ", (int)getpid());
368 len = Ustrlen(process_info);
369 va_start(ap, format);
370 if (!string_vformat(process_info + len, PROCESS_INFO_SIZE - len, format, ap))
371 Ustrcpy(process_info + len, "**** string overflowed buffer ****");
372 DEBUG(D_process_info) debug_printf("set_process_info: %s\n", process_info);
380 /*************************************************
381 * Call fopen() with umask 777 and adjust mode *
382 *************************************************/
384 /* Exim runs with umask(0) so that files created with open() have the mode that
385 is specified in the open() call. However, there are some files, typically in
386 the spool directory, that are created with fopen(). They end up world-writeable
387 if no precautions are taken. Although the spool directory is not accessible to
388 the world, this is an untidiness. So this is a wrapper function for fopen()
389 that sorts out the mode of the created file.
392 filename the file name
393 options the fopen() options
394 mode the required mode
396 Returns: the fopened FILE or NULL
400 modefopen(uschar *filename, char *options, mode_t mode)
402 mode_t saved_umask = umask(0777);
403 FILE *f = Ufopen(filename, options);
404 (void)umask(saved_umask);
405 if (f != NULL) (void)fchmod(fileno(f), mode);
412 /*************************************************
413 * Ensure stdin, stdout, and stderr exist *
414 *************************************************/
416 /* Some operating systems grumble if an exec() happens without a standard
417 input, output, and error (fds 0, 1, 2) being defined. The worry is that some
418 file will be opened and will use these fd values, and then some other bit of
419 code will assume, for example, that it can write error messages to stderr.
420 This function ensures that fds 0, 1, and 2 are open if they do not already
421 exist, by connecting them to /dev/null.
423 This function is also used to ensure that std{in,out,err} exist at all times,
424 so that if any library that Exim calls tries to use them, it doesn't crash.
436 for (i = 0; i <= 2; i++)
438 if (fstat(i, &statbuf) < 0 && errno == EBADF)
440 if (devnull < 0) devnull = open("/dev/null", O_RDWR);
441 if (devnull < 0) log_write(0, LOG_MAIN|LOG_PANIC_DIE, "%s",
442 string_open_failed(errno, "/dev/null"));
443 if (devnull != i) (void)dup2(devnull, i);
446 if (devnull > 2) (void)close(devnull);
452 /*************************************************
453 * Close unwanted file descriptors for delivery *
454 *************************************************/
456 /* This function is called from a new process that has been forked to deliver
457 an incoming message, either directly, or using exec.
459 We want any smtp input streams to be closed in this new process. However, it
460 has been observed that using fclose() here causes trouble. When reading in -bS
461 input, duplicate copies of messages have been seen. The files will be sharing a
462 file pointer with the parent process, and it seems that fclose() (at least on
463 some systems - I saw this on Solaris 2.5.1) messes with that file pointer, at
464 least sometimes. Hence we go for closing the underlying file descriptors.
466 If TLS is active, we want to shut down the TLS library, but without molesting
467 the parent's SSL connection.
469 For delivery of a non-SMTP message, we want to close stdin and stdout (and
470 stderr unless debugging) because the calling process might have set them up as
471 pipes and be waiting for them to close before it waits for the submission
472 process to terminate. If they aren't closed, they hold up the calling process
473 until the initial delivery process finishes, which is not what we want.
475 Exception: We do want it for synchronous delivery!
477 And notwithstanding all the above, if D_resolver is set, implying resolver
478 debugging, leave stdout open, because that's where the resolver writes its
481 When we close stderr (which implies we've also closed stdout), we also get rid
482 of any controlling terminal.
494 tls_close(FALSE); /* Shut down the TLS library */
496 (void)close(fileno(smtp_in));
497 (void)close(fileno(smtp_out));
502 (void)close(0); /* stdin */
503 if ((debug_selector & D_resolver) == 0) (void)close(1); /* stdout */
504 if (debug_selector == 0) /* stderr */
506 if (!synchronous_delivery)
519 /*************************************************
521 *************************************************/
523 /* This function sets a new uid and gid permanently, optionally calling
524 initgroups() to set auxiliary groups. There are some special cases when running
525 Exim in unprivileged modes. In these situations the effective uid will not be
526 root; if we already have the right effective uid/gid, and don't need to
527 initialize any groups, leave things as they are.
532 igflag TRUE if initgroups() wanted
533 msg text to use in debugging output and failure log
535 Returns: nothing; bombs out on failure
539 exim_setugid(uid_t uid, gid_t gid, BOOL igflag, uschar *msg)
541 uid_t euid = geteuid();
542 gid_t egid = getegid();
544 if (euid == root_uid || euid != uid || egid != gid || igflag)
546 /* At least one OS returns +1 for initgroups failure, so just check for
551 struct passwd *pw = getpwuid(uid);
554 if (initgroups(pw->pw_name, gid) != 0)
555 log_write(0,LOG_MAIN|LOG_PANIC_DIE,"initgroups failed for uid=%ld: %s",
556 (long int)uid, strerror(errno));
558 else log_write(0, LOG_MAIN|LOG_PANIC_DIE, "cannot run initgroups(): "
559 "no passwd entry for uid=%ld", (long int)uid);
562 if (setgid(gid) < 0 || setuid(uid) < 0)
564 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "unable to set gid=%ld or uid=%ld "
565 "(euid=%ld): %s", (long int)gid, (long int)uid, (long int)euid, msg);
569 /* Debugging output included uid/gid and all groups */
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);
578 debug_printf(" auxiliary group list:");
582 for (i = 0; i < group_count; i++) debug_printf(" %d", (int)group_list[i]);
584 else debug_printf(" <none>");
592 /*************************************************
594 *************************************************/
596 /* Exim exits via this function so that it always clears up any open
602 Returns: does not return
610 debug_printf(">>>>>>>>>>>>>>>> Exim pid=%d terminating with rc=%d "
611 ">>>>>>>>>>>>>>>>\n", (int)getpid(), rc);
618 /*************************************************
619 * Extract port from host address *
620 *************************************************/
622 /* Called to extract the port from the values given to -oMa and -oMi.
623 It also checks the syntax of the address, and terminates it before the
624 port data when a port is extracted.
627 address the address, with possible port on the end
629 Returns: the port, or zero if there isn't one
630 bombs out on a syntax error
634 check_port(uschar *address)
636 int port = host_address_extract_port(address);
637 if (string_is_ip_address(address, NULL) == 0)
639 fprintf(stderr, "exim abandoned: \"%s\" is not an IP address\n", address);
647 /*************************************************
648 * Test/verify an address *
649 *************************************************/
651 /* This function is called by the -bv and -bt code. It extracts a working
652 address from a full RFC 822 address. This isn't really necessary per se, but it
653 has the effect of collapsing source routes.
657 flags flag bits for verify_address()
658 exit_value to be set for failures
664 test_address(uschar *s, int flags, int *exit_value)
666 int start, end, domain;
667 uschar *parse_error = NULL;
668 uschar *address = parse_extract_address(s, &parse_error, &start, &end, &domain,
672 fprintf(stdout, "syntax error: %s\n", parse_error);
677 int rc = verify_address(deliver_make_addr(address,TRUE), stdout, flags, -1,
678 -1, -1, NULL, NULL, NULL);
679 if (rc == FAIL) *exit_value = 2;
680 else if (rc == DEFER && *exit_value == 0) *exit_value = 1;
686 /*************************************************
687 * Show supported features *
688 *************************************************/
690 /* This function is called for -bV/--version and for -d to output the optional
691 features of the current Exim binary.
693 Arguments: a FILE for printing
698 show_whats_supported(FILE *f)
700 #ifdef DB_VERSION_STRING
701 fprintf(f, "Berkeley DB: %s\n", DB_VERSION_STRING);
702 #elif defined(BTREEVERSION) && defined(HASHVERSION)
704 fprintf(f, "Probably Berkeley DB version 1.8x (native mode)\n");
706 fprintf(f, "Probably Berkeley DB version 1.8x (compatibility mode)\n");
708 #elif defined(_DBM_RDONLY) || defined(dbm_dirfno)
709 fprintf(f, "Probably ndbm\n");
710 #elif defined(USE_TDB)
711 fprintf(f, "Using tdb\n");
714 fprintf(f, "Probably GDBM (native mode)\n");
716 fprintf(f, "Probably GDBM (compatibility mode)\n");
720 fprintf(f, "Support for:");
721 #ifdef SUPPORT_CRYPTEQ
722 fprintf(f, " crypteq");
725 fprintf(f, " iconv()");
730 #ifdef HAVE_SETCLASSRESOURCES
731 fprintf(f, " use_setclassresources");
740 fprintf(f, " Expand_dlfunc");
742 #ifdef USE_TCP_WRAPPERS
743 fprintf(f, " TCPwrappers");
747 fprintf(f, " GnuTLS");
749 fprintf(f, " OpenSSL");
752 #ifdef SUPPORT_TRANSLATE_IP_ADDRESS
753 fprintf(f, " translate_ip_address");
755 #ifdef SUPPORT_MOVE_FROZEN_MESSAGES
756 fprintf(f, " move_frozen_messages");
758 #ifdef WITH_CONTENT_SCAN
759 fprintf(f, " Content_Scanning");
764 #ifdef WITH_OLD_DEMIME
765 fprintf(f, " Old_Demime");
767 #ifdef EXPERIMENTAL_SPF
768 fprintf(f, " Experimental_SPF");
770 #ifdef EXPERIMENTAL_SRS
771 fprintf(f, " Experimental_SRS");
773 #ifdef EXPERIMENTAL_BRIGHTMAIL
774 fprintf(f, " Experimental_Brightmail");
776 #ifdef EXPERIMENTAL_DCC
777 fprintf(f, " Experimental_DCC");
781 fprintf(f, "Lookups (built-in):");
782 #if defined(LOOKUP_LSEARCH) && LOOKUP_LSEARCH!=2
783 fprintf(f, " lsearch wildlsearch nwildlsearch iplsearch");
785 #if defined(LOOKUP_CDB) && LOOKUP_CDB!=2
788 #if defined(LOOKUP_DBM) && LOOKUP_DBM!=2
789 fprintf(f, " dbm dbmnz");
791 #if defined(LOOKUP_DNSDB) && LOOKUP_DNSDB!=2
792 fprintf(f, " dnsdb");
794 #if defined(LOOKUP_DSEARCH) && LOOKUP_DSEARCH!=2
795 fprintf(f, " dsearch");
797 #if defined(LOOKUP_IBASE) && LOOKUP_IBASE!=2
798 fprintf(f, " ibase");
800 #if defined(LOOKUP_LDAP) && LOOKUP_LDAP!=2
801 fprintf(f, " ldap ldapdn ldapm");
803 #if defined(LOOKUP_MYSQL) && LOOKUP_MYSQL!=2
804 fprintf(f, " mysql");
806 #if defined(LOOKUP_NIS) && LOOKUP_NIS!=2
807 fprintf(f, " nis nis0");
809 #if defined(LOOKUP_NISPLUS) && LOOKUP_NISPLUS!=2
810 fprintf(f, " nisplus");
812 #if defined(LOOKUP_ORACLE) && LOOKUP_ORACLE!=2
813 fprintf(f, " oracle");
815 #if defined(LOOKUP_PASSWD) && LOOKUP_PASSWD!=2
816 fprintf(f, " passwd");
818 #if defined(LOOKUP_PGSQL) && LOOKUP_PGSQL!=2
819 fprintf(f, " pgsql");
821 #if defined(LOOKUP_SQLITE) && LOOKUP_SQLITE!=2
822 fprintf(f, " sqlite");
824 #if defined(LOOKUP_TESTDB) && LOOKUP_TESTDB!=2
825 fprintf(f, " testdb");
827 #if defined(LOOKUP_WHOSON) && LOOKUP_WHOSON!=2
828 fprintf(f, " whoson");
832 fprintf(f, "Authenticators:");
834 fprintf(f, " cram_md5");
836 #ifdef AUTH_CYRUS_SASL
837 fprintf(f, " cyrus_sasl");
840 fprintf(f, " dovecot");
842 #ifdef AUTH_PLAINTEXT
843 fprintf(f, " plaintext");
850 fprintf(f, "Routers:");
852 fprintf(f, " accept");
854 #ifdef ROUTER_DNSLOOKUP
855 fprintf(f, " dnslookup");
857 #ifdef ROUTER_IPLITERAL
858 fprintf(f, " ipliteral");
860 #ifdef ROUTER_IPLOOKUP
861 fprintf(f, " iplookup");
863 #ifdef ROUTER_MANUALROUTE
864 fprintf(f, " manualroute");
866 #ifdef ROUTER_QUERYPROGRAM
867 fprintf(f, " queryprogram");
869 #ifdef ROUTER_REDIRECT
870 fprintf(f, " redirect");
874 fprintf(f, "Transports:");
875 #ifdef TRANSPORT_APPENDFILE
876 fprintf(f, " appendfile");
877 #ifdef SUPPORT_MAILDIR
878 fprintf(f, "/maildir");
880 #ifdef SUPPORT_MAILSTORE
881 fprintf(f, "/mailstore");
887 #ifdef TRANSPORT_AUTOREPLY
888 fprintf(f, " autoreply");
890 #ifdef TRANSPORT_LMTP
893 #ifdef TRANSPORT_PIPE
896 #ifdef TRANSPORT_SMTP
901 if (fixed_never_users[0] > 0)
904 fprintf(f, "Fixed never_users: ");
905 for (i = 1; i <= (int)fixed_never_users[0] - 1; i++)
906 fprintf(f, "%d:", (unsigned int)fixed_never_users[i]);
907 fprintf(f, "%d\n", (unsigned int)fixed_never_users[i]);
910 fprintf(f, "Size of off_t: " SIZE_T_FMT "\n", sizeof(off_t));
912 /* This runtime check is to help diagnose library linkage mismatches which
913 result in segfaults and the like; as such, it's left until the end,
914 just in case. There will still be a "Configuration file is" line still to
917 tls_version_report(f);
920 /* Everything else is details which are only worth reporting when debugging.
921 Perhaps the tls_version_report should move into this too. */
926 #ifdef AUTH_CYRUS_SASL
927 auth_cyrus_sasl_version_report(f);
930 fprintf(f, "Library version: PCRE: Compile: %d.%d%s\n"
932 PCRE_MAJOR, PCRE_MINOR,
933 /* PRE_PRERELEASE is either defined and empty or a string.
934 * unless its an ancient version of PCRE in which case it
936 #ifdef PCRE_PRERELEASE
944 for (i = 0; i < lookup_list_count; i++)
946 if (lookup_list[i]->version_report)
947 lookup_list[i]->version_report(f);
950 #ifdef WHITELIST_D_MACROS
951 fprintf(f, "WHITELIST_D_MACROS: \"%s\"\n", WHITELIST_D_MACROS);
953 fprintf(f, "WHITELIST_D_MACROS unset\n");
955 #ifdef TRUSTED_CONFIG_LIST
956 fprintf(f, "TRUSTED_CONFIG_LIST: \"%s\"\n", TRUSTED_CONFIG_LIST);
958 fprintf(f, "TRUSTED_CONFIG_LIST unset\n");
967 /*************************************************
968 * Quote a local part *
969 *************************************************/
971 /* This function is used when a sender address or a From: or Sender: header
972 line is being created from the caller's login, or from an authenticated_id. It
973 applies appropriate quoting rules for a local part.
975 Argument: the local part
976 Returns: the local part, quoted if necessary
980 local_part_quote(uschar *lpart)
982 BOOL needs_quote = FALSE;
987 for (t = lpart; !needs_quote && *t != 0; t++)
989 needs_quote = !isalnum(*t) && strchr("!#$%&'*+-/=?^_`{|}~", *t) == NULL &&
990 (*t != '.' || t == lpart || t[1] == 0);
993 if (!needs_quote) return lpart;
996 yield = string_cat(NULL, &size, &ptr, US"\"", 1);
1000 uschar *nq = US Ustrpbrk(lpart, "\\\"");
1003 yield = string_cat(yield, &size, &ptr, lpart, Ustrlen(lpart));
1006 yield = string_cat(yield, &size, &ptr, lpart, nq - lpart);
1007 yield = string_cat(yield, &size, &ptr, US"\\", 1);
1008 yield = string_cat(yield, &size, &ptr, nq, 1);
1012 yield = string_cat(yield, &size, &ptr, US"\"", 1);
1020 /*************************************************
1021 * Load readline() functions *
1022 *************************************************/
1024 /* This function is called from testing executions that read data from stdin,
1025 but only when running as the calling user. Currently, only -be does this. The
1026 function loads the readline() function library and passes back the functions.
1027 On some systems, it needs the curses library, so load that too, but try without
1028 it if loading fails. All this functionality has to be requested at build time.
1031 fn_readline_ptr pointer to where to put the readline pointer
1032 fn_addhist_ptr pointer to where to put the addhistory function
1034 Returns: the dlopen handle or NULL on failure
1038 set_readline(char * (**fn_readline_ptr)(char *),
1039 char * (**fn_addhist_ptr)(char *))
1042 void *dlhandle_curses = dlopen("libcurses.so", RTLD_GLOBAL|RTLD_LAZY);
1044 dlhandle = dlopen("libreadline.so", RTLD_GLOBAL|RTLD_NOW);
1045 if (dlhandle_curses != NULL) dlclose(dlhandle_curses);
1047 if (dlhandle != NULL)
1049 *fn_readline_ptr = (char *(*)(char*))dlsym(dlhandle, "readline");
1050 *fn_addhist_ptr = (char *(*)(char*))dlsym(dlhandle, "add_history");
1054 DEBUG(D_any) debug_printf("failed to load readline: %s\n", dlerror());
1063 /*************************************************
1064 * Get a line from stdin for testing things *
1065 *************************************************/
1067 /* This function is called when running tests that can take a number of lines
1068 of input (for example, -be and -bt). It handles continuations and trailing
1069 spaces. And prompting and a blank line output on eof. If readline() is in use,
1070 the arguments are non-NULL and provide the relevant functions.
1073 fn_readline readline function or NULL
1074 fn_addhist addhist function or NULL
1076 Returns: pointer to dynamic memory, or NULL at end of file
1080 get_stdinput(char *(*fn_readline)(char *), char *(*fn_addhist)(char *))
1085 uschar *yield = NULL;
1087 if (fn_readline == NULL) { printf("> "); fflush(stdout); }
1091 uschar buffer[1024];
1095 char *readline_line = NULL;
1096 if (fn_readline != NULL)
1098 if ((readline_line = fn_readline((i > 0)? "":"> ")) == NULL) break;
1099 if (*readline_line != 0 && fn_addhist != NULL) fn_addhist(readline_line);
1100 p = US readline_line;
1105 /* readline() not in use */
1108 if (Ufgets(buffer, sizeof(buffer), stdin) == NULL) break;
1112 /* Handle the line */
1114 ss = p + (int)Ustrlen(p);
1115 while (ss > p && isspace(ss[-1])) ss--;
1119 while (p < ss && isspace(*p)) p++; /* leading space after cont */
1122 yield = string_cat(yield, &size, &ptr, p, ss - p);
1125 if (fn_readline != NULL) free(readline_line);
1128 if (ss == p || yield[ptr-1] != '\\')
1136 if (yield == NULL) printf("\n");
1142 /*************************************************
1143 * Output usage information for the program *
1144 *************************************************/
1146 /* This function is called when there are no recipients
1147 or a specific --help argument was added.
1150 progname information on what name we were called by
1152 Returns: DOES NOT RETURN
1156 exim_usage(uschar *progname)
1159 /* Handle specific program invocation varients */
1160 if (Ustrcmp(progname, US"-mailq") == 0)
1163 "mailq - list the contents of the mail queue\n\n"
1164 "For a list of options, see the Exim documentation.\n");
1168 /* Generic usage - we output this whatever happens */
1170 "Exim is a Mail Transfer Agent. It is normally called by Mail User Agents,\n"
1171 "not directly from a shell command line. Options and/or arguments control\n"
1172 "what it does when called. For a list of options, see the Exim documentation.\n");
1179 /*************************************************
1180 * Validate that the macros given are okay *
1181 *************************************************/
1183 /* Typically, Exim will drop privileges if macros are supplied. In some
1184 cases, we want to not do so.
1186 Arguments: none (macros is a global)
1187 Returns: true if trusted, false otherwise
1191 macros_trusted(void)
1193 #ifdef WHITELIST_D_MACROS
1195 uschar *whitelisted, *end, *p, **whites, **w;
1196 int white_count, i, n;
1198 BOOL prev_char_item, found;
1203 #ifndef WHITELIST_D_MACROS
1207 /* We only trust -D overrides for some invoking users:
1208 root, the exim run-time user, the optional config owner user.
1209 I don't know why config-owner would be needed, but since they can own the
1210 config files anyway, there's no security risk to letting them override -D. */
1211 if ( ! ((real_uid == root_uid)
1212 || (real_uid == exim_uid)
1213 #ifdef CONFIGURE_OWNER
1214 || (real_uid == config_uid)
1218 debug_printf("macros_trusted rejecting macros for uid %d\n", (int) real_uid);
1222 /* Get a list of macros which are whitelisted */
1223 whitelisted = string_copy_malloc(US WHITELIST_D_MACROS);
1224 prev_char_item = FALSE;
1226 for (p = whitelisted; *p != '\0'; ++p)
1228 if (*p == ':' || isspace(*p))
1233 prev_char_item = FALSE;
1236 if (!prev_char_item)
1237 prev_char_item = TRUE;
1244 whites = store_malloc(sizeof(uschar *) * (white_count+1));
1245 for (p = whitelisted, i = 0; (p != end) && (i < white_count); ++p)
1250 if (i == white_count)
1252 while (*p != '\0' && p < end)
1258 /* The list of macros should be very short. Accept the N*M complexity. */
1259 for (m = macros; m != NULL; m = m->next)
1262 for (w = whites; *w; ++w)
1263 if (Ustrcmp(*w, m->name) == 0)
1270 if (m->replacement == NULL)
1272 len = Ustrlen(m->replacement);
1275 n = pcre_exec(regex_whitelisted_macro, NULL, CS m->replacement, len,
1276 0, PCRE_EOPT, NULL, 0);
1279 if (n != PCRE_ERROR_NOMATCH)
1280 debug_printf("macros_trusted checking %s returned %d\n", m->name, n);
1284 debug_printf("macros_trusted overriden to true by whitelisting\n");
1290 /*************************************************
1291 * Entry point and high-level code *
1292 *************************************************/
1294 /* Entry point for the Exim mailer. Analyse the arguments and arrange to take
1295 the appropriate action. All the necessary functions are present in the one
1296 binary. I originally thought one should split it up, but it turns out that so
1297 much of the apparatus is needed in each chunk that one might as well just have
1298 it all available all the time, which then makes the coding easier as well.
1301 argc count of entries in argv
1302 argv argument strings, with argv[0] being the program name
1304 Returns: EXIT_SUCCESS if terminated successfully
1305 EXIT_FAILURE otherwise, except when a message has been sent
1306 to the sender, and -oee was given
1310 main(int argc, char **cargv)
1312 uschar **argv = USS cargv;
1313 int arg_receive_timeout = -1;
1314 int arg_smtp_receive_timeout = -1;
1315 int arg_error_handling = error_handling;
1316 int filter_sfd = -1;
1317 int filter_ufd = -1;
1320 int list_queue_option = 0;
1322 int msg_action_arg = -1;
1323 int namelen = (argv[0] == NULL)? 0 : Ustrlen(argv[0]);
1324 int queue_only_reason = 0;
1326 int perl_start_option = 0;
1328 int recipients_arg = argc;
1329 int sender_address_domain = 0;
1330 int test_retry_arg = -1;
1331 int test_rewrite_arg = -1;
1332 BOOL arg_queue_only = FALSE;
1333 BOOL bi_option = FALSE;
1334 BOOL checking = FALSE;
1335 BOOL count_queue = FALSE;
1336 BOOL expansion_test = FALSE;
1337 BOOL extract_recipients = FALSE;
1338 BOOL forced_delivery = FALSE;
1339 BOOL f_end_dot = FALSE;
1340 BOOL deliver_give_up = FALSE;
1341 BOOL list_queue = FALSE;
1342 BOOL list_options = FALSE;
1343 BOOL local_queue_only;
1345 BOOL one_msg_action = FALSE;
1346 BOOL queue_only_set = FALSE;
1347 BOOL receiving_message = TRUE;
1348 BOOL sender_ident_set = FALSE;
1349 BOOL session_local_queue_only;
1351 BOOL removed_privilege = FALSE;
1352 BOOL usage_wanted = FALSE;
1353 BOOL verify_address_mode = FALSE;
1354 BOOL verify_as_sender = FALSE;
1355 BOOL version_printed = FALSE;
1356 uschar *alias_arg = NULL;
1357 uschar *called_as = US"";
1358 uschar *start_queue_run_id = NULL;
1359 uschar *stop_queue_run_id = NULL;
1360 uschar *expansion_test_message = NULL;
1361 uschar *ftest_domain = NULL;
1362 uschar *ftest_localpart = NULL;
1363 uschar *ftest_prefix = NULL;
1364 uschar *ftest_suffix = NULL;
1365 uschar *malware_test_file = NULL;
1366 uschar *real_sender_address;
1367 uschar *originator_home = US"/";
1371 struct stat statbuf;
1372 pid_t passed_qr_pid = (pid_t)0;
1373 int passed_qr_pipe = -1;
1374 gid_t group_list[NGROUPS_MAX];
1376 /* Possible options for -R and -S */
1378 static uschar *rsopts[] = { US"f", US"ff", US"r", US"rf", US"rff" };
1380 /* Need to define this in case we need to change the environment in order
1381 to get rid of a bogus time zone. We have to make it char rather than uschar
1382 because some OS define it in /usr/include/unistd.h. */
1384 extern char **environ;
1386 /* If the Exim user and/or group and/or the configuration file owner/group were
1387 defined by ref:name at build time, we must now find the actual uid/gid values.
1388 This is a feature to make the lives of binary distributors easier. */
1390 #ifdef EXIM_USERNAME
1391 if (route_finduser(US EXIM_USERNAME, &pw, &exim_uid))
1395 fprintf(stderr, "exim: refusing to run with uid 0 for \"%s\"\n",
1399 exim_gid = pw->pw_gid;
1403 fprintf(stderr, "exim: failed to find uid for user name \"%s\"\n",
1409 #ifdef EXIM_GROUPNAME
1410 if (!route_findgroup(US EXIM_GROUPNAME, &exim_gid))
1412 fprintf(stderr, "exim: failed to find gid for group name \"%s\"\n",
1418 #ifdef CONFIGURE_OWNERNAME
1419 if (!route_finduser(US CONFIGURE_OWNERNAME, NULL, &config_uid))
1421 fprintf(stderr, "exim: failed to find uid for user name \"%s\"\n",
1422 CONFIGURE_OWNERNAME);
1427 /* We default the system_filter_user to be the Exim run-time user, as a
1428 sane non-root value. */
1429 system_filter_uid = exim_uid;
1431 #ifdef CONFIGURE_GROUPNAME
1432 if (!route_findgroup(US CONFIGURE_GROUPNAME, &config_gid))
1434 fprintf(stderr, "exim: failed to find gid for group name \"%s\"\n",
1435 CONFIGURE_GROUPNAME);
1440 /* In the Cygwin environment, some initialization needs doing. It is fudged
1441 in by means of this macro. */
1447 /* Check a field which is patched when we are running Exim within its
1448 testing harness; do a fast initial check, and then the whole thing. */
1450 running_in_test_harness =
1451 *running_status == '<' && Ustrcmp(running_status, "<<<testing>>>") == 0;
1453 /* The C standard says that the equivalent of setlocale(LC_ALL, "C") is obeyed
1454 at the start of a program; however, it seems that some environments do not
1455 follow this. A "strange" locale can affect the formatting of timestamps, so we
1458 setlocale(LC_ALL, "C");
1460 /* Set up the default handler for timing using alarm(). */
1462 os_non_restarting_signal(SIGALRM, sigalrm_handler);
1464 /* Ensure we have a buffer for constructing log entries. Use malloc directly,
1465 because store_malloc writes a log entry on failure. */
1467 log_buffer = (uschar *)malloc(LOG_BUFFER_SIZE);
1468 if (log_buffer == NULL)
1470 fprintf(stderr, "exim: failed to get store for log buffer\n");
1474 /* Set log_stderr to stderr, provided that stderr exists. This gets reset to
1475 NULL when the daemon is run and the file is closed. We have to use this
1476 indirection, because some systems don't allow writing to the variable "stderr".
1479 if (fstat(fileno(stderr), &statbuf) >= 0) log_stderr = stderr;
1481 /* Arrange for the PCRE regex library to use our store functions. Note that
1482 the normal calls are actually macros that add additional arguments for
1483 debugging purposes so we have to assign specially constructed functions here.
1484 The default is to use store in the stacking pool, but this is overridden in the
1485 regex_must_compile() function. */
1487 pcre_malloc = function_store_get;
1488 pcre_free = function_dummy_free;
1490 /* Ensure there is a big buffer for temporary use in several places. It is put
1491 in malloc store so that it can be freed for enlargement if necessary. */
1493 big_buffer = store_malloc(big_buffer_size);
1495 /* Set up the handler for the data request signal, and set the initial
1496 descriptive text. */
1498 set_process_info("initializing");
1499 os_restarting_signal(SIGUSR1, usr1_handler);
1501 /* SIGHUP is used to get the daemon to reconfigure. It gets set as appropriate
1502 in the daemon code. For the rest of Exim's uses, we ignore it. */
1504 signal(SIGHUP, SIG_IGN);
1506 /* We don't want to die on pipe errors as the code is written to handle
1507 the write error instead. */
1509 signal(SIGPIPE, SIG_IGN);
1511 /* Under some circumstance on some OS, Exim can get called with SIGCHLD
1512 set to SIG_IGN. This causes subprocesses that complete before the parent
1513 process waits for them not to hang around, so when Exim calls wait(), nothing
1514 is there. The wait() code has been made robust against this, but let's ensure
1515 that SIGCHLD is set to SIG_DFL, because it's tidier to wait and get a process
1516 ending status. We use sigaction rather than plain signal() on those OS where
1517 SA_NOCLDWAIT exists, because we want to be sure it is turned off. (There was a
1518 problem on AIX with this.) */
1522 struct sigaction act;
1523 act.sa_handler = SIG_DFL;
1524 sigemptyset(&(act.sa_mask));
1526 sigaction(SIGCHLD, &act, NULL);
1529 signal(SIGCHLD, SIG_DFL);
1532 /* Save the arguments for use if we re-exec exim as a daemon after receiving
1537 /* Set up the version number. Set up the leading 'E' for the external form of
1538 message ids, set the pointer to the internal form, and initialize it to
1539 indicate no message being processed. */
1542 message_id_option[0] = '-';
1543 message_id_external = message_id_option + 1;
1544 message_id_external[0] = 'E';
1545 message_id = message_id_external + 1;
1548 /* Set the umask to zero so that any files Exim creates using open() are
1549 created with the modes that it specifies. NOTE: Files created with fopen() have
1550 a problem, which was not recognized till rather late (February 2006). With this
1551 umask, such files will be world writeable. (They are all content scanning files
1552 in the spool directory, which isn't world-accessible, so this is not a
1553 disaster, but it's untidy.) I don't want to change this overall setting,
1554 however, because it will interact badly with the open() calls. Instead, there's
1555 now a function called modefopen() that fiddles with the umask while calling
1560 /* Precompile the regular expression for matching a message id. Keep this in
1561 step with the code that generates ids in the accept.c module. We need to do
1562 this here, because the -M options check their arguments for syntactic validity
1563 using mac_ismsgid, which uses this. */
1566 regex_must_compile(US"^(?:[^\\W_]{6}-){2}[^\\W_]{2}$", FALSE, TRUE);
1568 /* Precompile the regular expression that is used for matching an SMTP error
1569 code, possibly extended, at the start of an error message. Note that the
1570 terminating whitespace character is included. */
1573 regex_must_compile(US"^\\d\\d\\d\\s(?:\\d\\.\\d\\d?\\d?\\.\\d\\d?\\d?\\s)?",
1576 #ifdef WHITELIST_D_MACROS
1577 /* Precompile the regular expression used to filter the content of macros
1578 given to -D for permissibility. */
1580 regex_whitelisted_macro =
1581 regex_must_compile(US"^[A-Za-z0-9_/.-]*$", FALSE, TRUE);
1585 /* If the program is called as "mailq" treat it as equivalent to "exim -bp";
1586 this seems to be a generally accepted convention, since one finds symbolic
1587 links called "mailq" in standard OS configurations. */
1589 if ((namelen == 5 && Ustrcmp(argv[0], "mailq") == 0) ||
1590 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/mailq", 6) == 0))
1593 receiving_message = FALSE;
1594 called_as = US"-mailq";
1597 /* If the program is called as "rmail" treat it as equivalent to
1598 "exim -i -oee", thus allowing UUCP messages to be input using non-SMTP mode,
1599 i.e. preventing a single dot on a line from terminating the message, and
1600 returning with zero return code, even in cases of error (provided an error
1601 message has been sent). */
1603 if ((namelen == 5 && Ustrcmp(argv[0], "rmail") == 0) ||
1604 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/rmail", 6) == 0))
1607 called_as = US"-rmail";
1608 errors_sender_rc = EXIT_SUCCESS;
1611 /* If the program is called as "rsmtp" treat it as equivalent to "exim -bS";
1612 this is a smail convention. */
1614 if ((namelen == 5 && Ustrcmp(argv[0], "rsmtp") == 0) ||
1615 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/rsmtp", 6) == 0))
1617 smtp_input = smtp_batched_input = TRUE;
1618 called_as = US"-rsmtp";
1621 /* If the program is called as "runq" treat it as equivalent to "exim -q";
1622 this is a smail convention. */
1624 if ((namelen == 4 && Ustrcmp(argv[0], "runq") == 0) ||
1625 (namelen > 4 && Ustrncmp(argv[0] + namelen - 5, "/runq", 5) == 0))
1628 receiving_message = FALSE;
1629 called_as = US"-runq";
1632 /* If the program is called as "newaliases" treat it as equivalent to
1633 "exim -bi"; this is a sendmail convention. */
1635 if ((namelen == 10 && Ustrcmp(argv[0], "newaliases") == 0) ||
1636 (namelen > 10 && Ustrncmp(argv[0] + namelen - 11, "/newaliases", 11) == 0))
1639 receiving_message = FALSE;
1640 called_as = US"-newaliases";
1643 /* Save the original effective uid for a couple of uses later. It should
1644 normally be root, but in some esoteric environments it may not be. */
1646 original_euid = geteuid();
1648 /* Get the real uid and gid. If the caller is root, force the effective uid/gid
1649 to be the same as the real ones. This makes a difference only if Exim is setuid
1650 (or setgid) to something other than root, which could be the case in some
1651 special configurations. */
1653 real_uid = getuid();
1654 real_gid = getgid();
1656 if (real_uid == root_uid)
1658 rv = setgid(real_gid);
1661 fprintf(stderr, "exim: setgid(%ld) failed: %s\n",
1662 (long int)real_gid, strerror(errno));
1665 rv = setuid(real_uid);
1668 fprintf(stderr, "exim: setuid(%ld) failed: %s\n",
1669 (long int)real_uid, strerror(errno));
1674 /* If neither the original real uid nor the original euid was root, Exim is
1675 running in an unprivileged state. */
1677 unprivileged = (real_uid != root_uid && original_euid != root_uid);
1679 /* Scan the program's arguments. Some can be dealt with right away; others are
1680 simply recorded for checking and handling afterwards. Do a high-level switch
1681 on the second character (the one after '-'), to save some effort. */
1683 for (i = 1; i < argc; i++)
1685 BOOL badarg = FALSE;
1686 uschar *arg = argv[i];
1690 /* An argument not starting with '-' is the start of a recipients list;
1691 break out of the options-scanning loop. */
1699 /* An option consistion of -- terminates the options */
1701 if (Ustrcmp(arg, "--") == 0)
1703 recipients_arg = i + 1;
1707 /* Handle flagged options */
1709 switchchar = arg[1];
1712 /* Make all -ex options synonymous with -oex arguments, since that
1713 is assumed by various callers. Also make -qR options synonymous with -R
1714 options, as that seems to be required as well. Allow for -qqR too, and
1715 the same for -S options. */
1717 if (Ustrncmp(arg+1, "oe", 2) == 0 ||
1718 Ustrncmp(arg+1, "qR", 2) == 0 ||
1719 Ustrncmp(arg+1, "qS", 2) == 0)
1721 switchchar = arg[2];
1724 else if (Ustrncmp(arg+1, "qqR", 3) == 0 || Ustrncmp(arg+1, "qqS", 3) == 0)
1726 switchchar = arg[3];
1728 queue_2stage = TRUE;
1731 /* Make -r synonymous with -f, since it is a documented alias */
1733 else if (arg[1] == 'r') switchchar = 'f';
1735 /* Make -ov synonymous with -v */
1737 else if (Ustrcmp(arg, "-ov") == 0)
1743 /* deal with --option_aliases */
1744 else if (switchchar == '-')
1746 if (Ustrcmp(argrest, "help") == 0)
1748 usage_wanted = TRUE;
1751 else if (Ustrcmp(argrest, "version") == 0)
1758 /* High-level switch on active initial letter */
1762 /* -Btype is a sendmail option for 7bit/8bit setting. Exim is 8-bit clean
1763 so has no need of it. */
1766 if (*argrest == 0) i++; /* Skip over the type */
1771 receiving_message = FALSE; /* Reset TRUE for -bm, -bS, -bs below */
1773 /* -bd: Run in daemon mode, awaiting SMTP connections.
1774 -bdf: Ditto, but in the foreground.
1777 if (*argrest == 'd')
1779 daemon_listen = TRUE;
1780 if (*(++argrest) == 'f') background_daemon = FALSE;
1781 else if (*argrest != 0) { badarg = TRUE; break; }
1784 /* -be: Run in expansion test mode
1785 -bem: Ditto, but read a message from a file first
1788 else if (*argrest == 'e')
1790 expansion_test = checking = TRUE;
1791 if (argrest[1] == 'm')
1793 if (++i >= argc) { badarg = TRUE; break; }
1794 expansion_test_message = argv[i];
1797 if (argrest[1] != 0) { badarg = TRUE; break; }
1800 /* -bF: Run system filter test */
1802 else if (*argrest == 'F')
1804 filter_test |= FTEST_SYSTEM;
1805 if (*(++argrest) != 0) { badarg = TRUE; break; }
1806 if (++i < argc) filter_test_sfile = argv[i]; else
1808 fprintf(stderr, "exim: file name expected after %s\n", argv[i-1]);
1813 /* -bf: Run user filter test
1814 -bfd: Set domain for filter testing
1815 -bfl: Set local part for filter testing
1816 -bfp: Set prefix for filter testing
1817 -bfs: Set suffix for filter testing
1820 else if (*argrest == 'f')
1822 if (*(++argrest) == 0)
1824 filter_test |= FTEST_USER;
1825 if (++i < argc) filter_test_ufile = argv[i]; else
1827 fprintf(stderr, "exim: file name expected after %s\n", argv[i-1]);
1835 fprintf(stderr, "exim: string expected after %s\n", arg);
1838 if (Ustrcmp(argrest, "d") == 0) ftest_domain = argv[i];
1839 else if (Ustrcmp(argrest, "l") == 0) ftest_localpart = argv[i];
1840 else if (Ustrcmp(argrest, "p") == 0) ftest_prefix = argv[i];
1841 else if (Ustrcmp(argrest, "s") == 0) ftest_suffix = argv[i];
1842 else { badarg = TRUE; break; }
1846 /* -bh: Host checking - an IP address must follow. */
1848 else if (Ustrcmp(argrest, "h") == 0 || Ustrcmp(argrest, "hc") == 0)
1850 if (++i >= argc) { badarg = TRUE; break; }
1851 sender_host_address = argv[i];
1852 host_checking = checking = log_testing_mode = TRUE;
1853 host_checking_callout = argrest[1] == 'c';
1856 /* -bi: This option is used by sendmail to initialize *the* alias file,
1857 though it has the -oA option to specify a different file. Exim has no
1858 concept of *the* alias file, but since Sun's YP make script calls
1859 sendmail this way, some support must be provided. */
1861 else if (Ustrcmp(argrest, "i") == 0) bi_option = TRUE;
1863 /* -bm: Accept and deliver message - the default option. Reinstate
1864 receiving_message, which got turned off for all -b options. */
1866 else if (Ustrcmp(argrest, "m") == 0) receiving_message = TRUE;
1868 /* -bmalware: test the filename given for malware */
1870 else if (Ustrcmp(argrest, "malware") == 0)
1872 if (++i >= argc) { badarg = TRUE; break; }
1873 malware_test_file = argv[i];
1876 /* -bnq: For locally originating messages, do not qualify unqualified
1877 addresses. In the envelope, this causes errors; in header lines they
1880 else if (Ustrcmp(argrest, "nq") == 0)
1882 allow_unqualified_sender = FALSE;
1883 allow_unqualified_recipient = FALSE;
1886 /* -bpxx: List the contents of the mail queue, in various forms. If
1887 the option is -bpc, just a queue count is needed. Otherwise, if the
1888 first letter after p is r, then order is random. */
1890 else if (*argrest == 'p')
1892 if (*(++argrest) == 'c')
1895 if (*(++argrest) != 0) badarg = TRUE;
1899 if (*argrest == 'r')
1901 list_queue_option = 8;
1904 else list_queue_option = 0;
1908 /* -bp: List the contents of the mail queue, top-level only */
1910 if (*argrest == 0) {}
1912 /* -bpu: List the contents of the mail queue, top-level undelivered */
1914 else if (Ustrcmp(argrest, "u") == 0) list_queue_option += 1;
1916 /* -bpa: List the contents of the mail queue, including all delivered */
1918 else if (Ustrcmp(argrest, "a") == 0) list_queue_option += 2;
1920 /* Unknown after -bp[r] */
1930 /* -bP: List the configuration variables given as the address list.
1931 Force -v, so configuration errors get displayed. */
1933 else if (Ustrcmp(argrest, "P") == 0)
1935 list_options = TRUE;
1936 debug_selector |= D_v;
1937 debug_file = stderr;
1940 /* -brt: Test retry configuration lookup */
1942 else if (Ustrcmp(argrest, "rt") == 0)
1944 test_retry_arg = i + 1;
1948 /* -brw: Test rewrite configuration */
1950 else if (Ustrcmp(argrest, "rw") == 0)
1952 test_rewrite_arg = i + 1;
1956 /* -bS: Read SMTP commands on standard input, but produce no replies -
1957 all errors are reported by sending messages. */
1959 else if (Ustrcmp(argrest, "S") == 0)
1960 smtp_input = smtp_batched_input = receiving_message = TRUE;
1962 /* -bs: Read SMTP commands on standard input and produce SMTP replies
1963 on standard output. */
1965 else if (Ustrcmp(argrest, "s") == 0) smtp_input = receiving_message = TRUE;
1967 /* -bt: address testing mode */
1969 else if (Ustrcmp(argrest, "t") == 0)
1970 address_test_mode = checking = log_testing_mode = TRUE;
1972 /* -bv: verify addresses */
1974 else if (Ustrcmp(argrest, "v") == 0)
1975 verify_address_mode = checking = log_testing_mode = TRUE;
1977 /* -bvs: verify sender addresses */
1979 else if (Ustrcmp(argrest, "vs") == 0)
1981 verify_address_mode = checking = log_testing_mode = TRUE;
1982 verify_as_sender = TRUE;
1985 /* -bV: Print version string and support details */
1987 else if (Ustrcmp(argrest, "V") == 0)
1989 printf("Exim version %s #%s built %s\n", version_string,
1990 version_cnumber, version_date);
1991 printf("%s\n", CS version_copyright);
1992 version_printed = TRUE;
1993 show_whats_supported(stdout);
2000 /* -C: change configuration file list; ignore if it isn't really
2001 a change! Enforce a prefix check if required. */
2006 if(++i < argc) argrest = argv[i]; else
2007 { badarg = TRUE; break; }
2009 if (Ustrcmp(config_main_filelist, argrest) != 0)
2011 #ifdef ALT_CONFIG_PREFIX
2013 int len = Ustrlen(ALT_CONFIG_PREFIX);
2014 uschar *list = argrest;
2016 while((filename = string_nextinlist(&list, &sep, big_buffer,
2017 big_buffer_size)) != NULL)
2019 if ((Ustrlen(filename) < len ||
2020 Ustrncmp(filename, ALT_CONFIG_PREFIX, len) != 0 ||
2021 Ustrstr(filename, "/../") != NULL) &&
2022 (Ustrcmp(filename, "/dev/null") != 0 || real_uid != root_uid))
2024 fprintf(stderr, "-C Permission denied\n");
2029 if (real_uid != root_uid)
2031 #ifdef TRUSTED_CONFIG_LIST
2033 if (real_uid != exim_uid
2034 #ifdef CONFIGURE_OWNER
2035 && real_uid != config_uid
2038 trusted_config = FALSE;
2041 FILE *trust_list = Ufopen(TRUSTED_CONFIG_LIST, "rb");
2044 struct stat statbuf;
2046 if (fstat(fileno(trust_list), &statbuf) != 0 ||
2047 (statbuf.st_uid != root_uid /* owner not root */
2048 #ifdef CONFIGURE_OWNER
2049 && statbuf.st_uid != config_uid /* owner not the special one */
2052 (statbuf.st_gid != root_gid /* group not root */
2053 #ifdef CONFIGURE_GROUP
2054 && statbuf.st_gid != config_gid /* group not the special one */
2056 && (statbuf.st_mode & 020) != 0 /* group writeable */
2058 (statbuf.st_mode & 2) != 0) /* world writeable */
2060 trusted_config = FALSE;
2065 /* Well, the trust list at least is up to scratch... */
2066 void *reset_point = store_get(0);
2067 uschar *trusted_configs[32];
2071 while (Ufgets(big_buffer, big_buffer_size, trust_list))
2073 uschar *start = big_buffer, *nl;
2074 while (*start && isspace(*start))
2078 nl = Ustrchr(start, '\n');
2081 trusted_configs[nr_configs++] = string_copy(start);
2082 if (nr_configs == 32)
2090 uschar *list = argrest;
2092 while (trusted_config && (filename = string_nextinlist(&list,
2093 &sep, big_buffer, big_buffer_size)) != NULL)
2095 for (i=0; i < nr_configs; i++)
2097 if (Ustrcmp(filename, trusted_configs[i]) == 0)
2100 if (i == nr_configs)
2102 trusted_config = FALSE;
2106 store_reset(reset_point);
2110 /* No valid prefixes found in trust_list file. */
2111 trusted_config = FALSE;
2117 /* Could not open trust_list file. */
2118 trusted_config = FALSE;
2122 /* Not root; don't trust config */
2123 trusted_config = FALSE;
2127 config_main_filelist = argrest;
2128 config_changed = TRUE;
2133 /* -D: set up a macro definition */
2136 #ifdef DISABLE_D_OPTION
2137 fprintf(stderr, "exim: -D is not available in this Exim binary\n");
2142 macro_item *mlast = NULL;
2145 uschar *s = argrest;
2147 while (isspace(*s)) s++;
2149 if (*s < 'A' || *s > 'Z')
2151 fprintf(stderr, "exim: macro name set by -D must start with "
2152 "an upper case letter\n");
2156 while (isalnum(*s) || *s == '_')
2158 if (ptr < sizeof(name)-1) name[ptr++] = *s;
2162 if (ptr == 0) { badarg = TRUE; break; }
2163 while (isspace(*s)) s++;
2166 if (*s++ != '=') { badarg = TRUE; break; }
2167 while (isspace(*s)) s++;
2170 for (m = macros; m != NULL; m = m->next)
2172 if (Ustrcmp(m->name, name) == 0)
2174 fprintf(stderr, "exim: duplicated -D in command line\n");
2180 m = store_get(sizeof(macro_item) + Ustrlen(name));
2182 m->command_line = TRUE;
2183 if (mlast == NULL) macros = m; else mlast->next = m;
2184 Ustrcpy(m->name, name);
2185 m->replacement = string_copy(s);
2187 if (clmacro_count >= MAX_CLMACROS)
2189 fprintf(stderr, "exim: too many -D options on command line\n");
2192 clmacros[clmacro_count++] = string_sprintf("-D%s=%s", m->name,
2198 /* -d: Set debug level (see also -v below) or set the drop_cr option.
2199 The latter is now a no-op, retained for compatibility only. If -dd is used,
2200 debugging subprocesses of the daemon is disabled. */
2203 if (Ustrcmp(argrest, "ropcr") == 0)
2205 /* drop_cr = TRUE; */
2208 /* Use an intermediate variable so that we don't set debugging while
2209 decoding the debugging bits. */
2213 unsigned int selector = D_default;
2216 if (*argrest == 'd')
2218 debug_daemon = TRUE;
2222 decode_bits(&selector, NULL, D_memory, 0, argrest, debug_options,
2223 debug_options_count, US"debug", 0);
2224 debug_selector = selector;
2229 /* -E: This is a local error message. This option is not intended for
2230 external use at all, but is not restricted to trusted callers because it
2231 does no harm (just suppresses certain error messages) and if Exim is run
2232 not setuid root it won't always be trusted when it generates error
2233 messages using this option. If there is a message id following -E, point
2234 message_reference at it, for logging. */
2237 local_error_message = TRUE;
2238 if (mac_ismsgid(argrest)) message_reference = argrest;
2242 /* -ex: The vacation program calls sendmail with the undocumented "-eq"
2243 option, so it looks as if historically the -oex options are also callable
2244 without the leading -o. So we have to accept them. Before the switch,
2245 anything starting -oe has been converted to -e. Exim does not support all
2246 of the sendmail error options. */
2249 if (Ustrcmp(argrest, "e") == 0)
2251 arg_error_handling = ERRORS_SENDER;
2252 errors_sender_rc = EXIT_SUCCESS;
2254 else if (Ustrcmp(argrest, "m") == 0) arg_error_handling = ERRORS_SENDER;
2255 else if (Ustrcmp(argrest, "p") == 0) arg_error_handling = ERRORS_STDERR;
2256 else if (Ustrcmp(argrest, "q") == 0) arg_error_handling = ERRORS_STDERR;
2257 else if (Ustrcmp(argrest, "w") == 0) arg_error_handling = ERRORS_SENDER;
2262 /* -F: Set sender's full name, used instead of the gecos entry from
2263 the password file. Since users can usually alter their gecos entries,
2264 there's no security involved in using this instead. The data can follow
2265 the -F or be in the next argument. */
2270 if(++i < argc) argrest = argv[i]; else
2271 { badarg = TRUE; break; }
2273 originator_name = argrest;
2274 sender_name_forced = TRUE;
2278 /* -f: Set sender's address - this value is only actually used if Exim is
2279 run by a trusted user, or if untrusted_set_sender is set and matches the
2280 address, except that the null address can always be set by any user. The
2281 test for this happens later, when the value given here is ignored when not
2282 permitted. For an untrusted user, the actual sender is still put in Sender:
2283 if it doesn't match the From: header (unless no_local_from_check is set).
2284 The data can follow the -f or be in the next argument. The -r switch is an
2285 obsolete form of -f but since there appear to be programs out there that
2286 use anything that sendmail has ever supported, better accept it - the
2287 synonymizing is done before the switch above.
2289 At this stage, we must allow domain literal addresses, because we don't
2290 know what the setting of allow_domain_literals is yet. Ditto for trailing
2291 dots and strip_trailing_dot. */
2299 if (i+1 < argc) argrest = argv[++i]; else
2300 { badarg = TRUE; break; }
2304 sender_address = string_sprintf(""); /* Ensure writeable memory */
2308 uschar *temp = argrest + Ustrlen(argrest) - 1;
2309 while (temp >= argrest && isspace(*temp)) temp--;
2310 if (temp >= argrest && *temp == '.') f_end_dot = TRUE;
2311 allow_domain_literals = TRUE;
2312 strip_trailing_dot = TRUE;
2313 sender_address = parse_extract_address(argrest, &errmess, &start, &end,
2314 &sender_address_domain, TRUE);
2315 allow_domain_literals = FALSE;
2316 strip_trailing_dot = FALSE;
2317 if (sender_address == NULL)
2319 fprintf(stderr, "exim: bad -f address \"%s\": %s\n", argrest, errmess);
2320 return EXIT_FAILURE;
2323 sender_address_forced = TRUE;
2327 /* This is some Sendmail thing which can be ignored */
2332 /* -h: Set the hop count for an incoming message. Exim does not currently
2333 support this; it always computes it by counting the Received: headers.
2334 To put it in will require a change to the spool header file format. */
2339 if(++i < argc) argrest = argv[i]; else
2340 { badarg = TRUE; break; }
2342 if (!isdigit(*argrest)) badarg = TRUE;
2346 /* -i: Set flag so dot doesn't end non-SMTP input (same as -oi, seems
2347 not to be documented for sendmail but mailx (at least) uses it) */
2350 if (*argrest == 0) dot_ends = FALSE; else badarg = TRUE;
2355 receiving_message = FALSE;
2357 /* -MC: continue delivery of another message via an existing open
2358 file descriptor. This option is used for an internal call by the
2359 smtp transport when there is a pending message waiting to go to an
2360 address to which it has got a connection. Five subsequent arguments are
2361 required: transport name, host name, IP address, sequence number, and
2362 message_id. Transports may decline to create new processes if the sequence
2363 number gets too big. The channel is stdin. This (-MC) must be the last
2364 argument. There's a subsequent check that the real-uid is privileged.
2366 If we are running in the test harness. delay for a bit, to let the process
2367 that set this one up complete. This makes for repeatability of the logging,
2370 if (Ustrcmp(argrest, "C") == 0)
2372 union sockaddr_46 interface_sock;
2373 EXIM_SOCKLEN_T size = sizeof(interface_sock);
2377 fprintf(stderr, "exim: too many or too few arguments after -MC\n");
2378 return EXIT_FAILURE;
2381 if (msg_action_arg >= 0)
2383 fprintf(stderr, "exim: incompatible arguments\n");
2384 return EXIT_FAILURE;
2387 continue_transport = argv[++i];
2388 continue_hostname = argv[++i];
2389 continue_host_address = argv[++i];
2390 continue_sequence = Uatoi(argv[++i]);
2391 msg_action = MSG_DELIVER;
2392 msg_action_arg = ++i;
2393 forced_delivery = TRUE;
2394 queue_run_pid = passed_qr_pid;
2395 queue_run_pipe = passed_qr_pipe;
2397 if (!mac_ismsgid(argv[i]))
2399 fprintf(stderr, "exim: malformed message id %s after -MC option\n",
2401 return EXIT_FAILURE;
2404 /* Set up $sending_ip_address and $sending_port */
2406 if (getsockname(fileno(stdin), (struct sockaddr *)(&interface_sock),
2408 sending_ip_address = host_ntoa(-1, &interface_sock, NULL,
2412 fprintf(stderr, "exim: getsockname() failed after -MC option: %s\n",
2414 return EXIT_FAILURE;
2417 if (running_in_test_harness) millisleep(500);
2421 /* -MCA: set the smtp_authenticated flag; this is useful only when it
2422 precedes -MC (see above). The flag indicates that the host to which
2423 Exim is connected has accepted an AUTH sequence. */
2425 else if (Ustrcmp(argrest, "CA") == 0)
2427 smtp_authenticated = TRUE;
2431 /* -MCP: set the smtp_use_pipelining flag; this is useful only when
2432 it preceded -MC (see above) */
2434 else if (Ustrcmp(argrest, "CP") == 0)
2436 smtp_use_pipelining = TRUE;
2440 /* -MCQ: pass on the pid of the queue-running process that started
2441 this chain of deliveries and the fd of its synchronizing pipe; this
2442 is useful only when it precedes -MC (see above) */
2444 else if (Ustrcmp(argrest, "CQ") == 0)
2446 if(++i < argc) passed_qr_pid = (pid_t)(Uatol(argv[i]));
2448 if(++i < argc) passed_qr_pipe = (int)(Uatol(argv[i]));
2453 /* -MCS: set the smtp_use_size flag; this is useful only when it
2454 precedes -MC (see above) */
2456 else if (Ustrcmp(argrest, "CS") == 0)
2458 smtp_use_size = TRUE;
2462 /* -MCT: set the tls_offered flag; this is useful only when it
2463 precedes -MC (see above). The flag indicates that the host to which
2464 Exim is connected has offered TLS support. */
2467 else if (Ustrcmp(argrest, "CT") == 0)
2474 /* -M[x]: various operations on the following list of message ids:
2475 -M deliver the messages, ignoring next retry times and thawing
2476 -Mc deliver the messages, checking next retry times, no thawing
2477 -Mf freeze the messages
2478 -Mg give up on the messages
2479 -Mt thaw the messages
2480 -Mrm remove the messages
2481 In the above cases, this must be the last option. There are also the
2482 following options which are followed by a single message id, and which
2483 act on that message. Some of them use the "recipient" addresses as well.
2484 -Mar add recipient(s)
2485 -Mmad mark all recipients delivered
2486 -Mmd mark recipients(s) delivered
2488 -Mset load a message for use with -be
2490 -Mvc show copy (of whole message, in RFC 2822 format)
2495 else if (*argrest == 0)
2497 msg_action = MSG_DELIVER;
2498 forced_delivery = deliver_force_thaw = TRUE;
2500 else if (Ustrcmp(argrest, "ar") == 0)
2502 msg_action = MSG_ADD_RECIPIENT;
2503 one_msg_action = TRUE;
2505 else if (Ustrcmp(argrest, "c") == 0) msg_action = MSG_DELIVER;
2506 else if (Ustrcmp(argrest, "es") == 0)
2508 msg_action = MSG_EDIT_SENDER;
2509 one_msg_action = TRUE;
2511 else if (Ustrcmp(argrest, "f") == 0) msg_action = MSG_FREEZE;
2512 else if (Ustrcmp(argrest, "g") == 0)
2514 msg_action = MSG_DELIVER;
2515 deliver_give_up = TRUE;
2517 else if (Ustrcmp(argrest, "mad") == 0)
2519 msg_action = MSG_MARK_ALL_DELIVERED;
2521 else if (Ustrcmp(argrest, "md") == 0)
2523 msg_action = MSG_MARK_DELIVERED;
2524 one_msg_action = TRUE;
2526 else if (Ustrcmp(argrest, "rm") == 0) msg_action = MSG_REMOVE;
2527 else if (Ustrcmp(argrest, "set") == 0)
2529 msg_action = MSG_LOAD;
2530 one_msg_action = TRUE;
2532 else if (Ustrcmp(argrest, "t") == 0) msg_action = MSG_THAW;
2533 else if (Ustrcmp(argrest, "vb") == 0)
2535 msg_action = MSG_SHOW_BODY;
2536 one_msg_action = TRUE;
2538 else if (Ustrcmp(argrest, "vc") == 0)
2540 msg_action = MSG_SHOW_COPY;
2541 one_msg_action = TRUE;
2543 else if (Ustrcmp(argrest, "vh") == 0)
2545 msg_action = MSG_SHOW_HEADER;
2546 one_msg_action = TRUE;
2548 else if (Ustrcmp(argrest, "vl") == 0)
2550 msg_action = MSG_SHOW_LOG;
2551 one_msg_action = TRUE;
2553 else { badarg = TRUE; break; }
2555 /* All the -Mxx options require at least one message id. */
2557 msg_action_arg = i + 1;
2558 if (msg_action_arg >= argc)
2560 fprintf(stderr, "exim: no message ids given after %s option\n", arg);
2561 return EXIT_FAILURE;
2564 /* Some require only message ids to follow */
2566 if (!one_msg_action)
2569 for (j = msg_action_arg; j < argc; j++) if (!mac_ismsgid(argv[j]))
2571 fprintf(stderr, "exim: malformed message id %s after %s option\n",
2573 return EXIT_FAILURE;
2575 goto END_ARG; /* Remaining args are ids */
2578 /* Others require only one message id, possibly followed by addresses,
2579 which will be handled as normal arguments. */
2583 if (!mac_ismsgid(argv[msg_action_arg]))
2585 fprintf(stderr, "exim: malformed message id %s after %s option\n",
2586 argv[msg_action_arg], arg);
2587 return EXIT_FAILURE;
2594 /* Some programs seem to call the -om option without the leading o;
2595 for sendmail it askes for "me too". Exim always does this. */
2598 if (*argrest != 0) badarg = TRUE;
2602 /* -N: don't do delivery - a debugging option that stops transports doing
2603 their thing. It implies debugging at the D_v level. */
2608 dont_deliver = TRUE;
2609 debug_selector |= D_v;
2610 debug_file = stderr;
2616 /* -n: This means "don't alias" in sendmail, apparently. Just ignore
2622 /* -O: Just ignore it. In sendmail, apparently -O option=value means set
2623 option to the specified value. This form uses long names. We need to handle
2624 -O option=value and -Ooption=value. */
2631 fprintf(stderr, "exim: string expected after -O\n");
2639 /* -oA: Set an argument for the bi command (sendmail's "alternate alias
2642 if (*argrest == 'A')
2644 alias_arg = argrest + 1;
2645 if (alias_arg[0] == 0)
2647 if (i+1 < argc) alias_arg = argv[++i]; else
2649 fprintf(stderr, "exim: string expected after -oA\n");
2655 /* -oB: Set a connection message max value for remote deliveries */
2657 else if (*argrest == 'B')
2659 uschar *p = argrest + 1;
2662 if (i+1 < argc && isdigit((argv[i+1][0]))) p = argv[++i]; else
2664 connection_max_messages = 1;
2673 fprintf(stderr, "exim: number expected after -oB\n");
2676 connection_max_messages = Uatoi(p);
2680 /* -odb: background delivery */
2682 else if (Ustrcmp(argrest, "db") == 0)
2684 synchronous_delivery = FALSE;
2685 arg_queue_only = FALSE;
2686 queue_only_set = TRUE;
2689 /* -odf: foreground delivery (smail-compatible option); same effect as
2690 -odi: interactive (synchronous) delivery (sendmail-compatible option)
2693 else if (Ustrcmp(argrest, "df") == 0 || Ustrcmp(argrest, "di") == 0)
2695 synchronous_delivery = TRUE;
2696 arg_queue_only = FALSE;
2697 queue_only_set = TRUE;
2700 /* -odq: queue only */
2702 else if (Ustrcmp(argrest, "dq") == 0)
2704 synchronous_delivery = FALSE;
2705 arg_queue_only = TRUE;
2706 queue_only_set = TRUE;
2709 /* -odqs: queue SMTP only - do local deliveries and remote routing,
2710 but no remote delivery */
2712 else if (Ustrcmp(argrest, "dqs") == 0)
2715 arg_queue_only = FALSE;
2716 queue_only_set = TRUE;
2719 /* -oex: Sendmail error flags. As these are also accepted without the
2720 leading -o prefix, for compatibility with vacation and other callers,
2721 they are handled with -e above. */
2723 /* -oi: Set flag so dot doesn't end non-SMTP input (same as -i)
2724 -oitrue: Another sendmail syntax for the same */
2726 else if (Ustrcmp(argrest, "i") == 0 ||
2727 Ustrcmp(argrest, "itrue") == 0)
2730 /* -oM*: Set various characteristics for an incoming message; actually
2731 acted on for trusted callers only. */
2733 else if (*argrest == 'M')
2737 fprintf(stderr, "exim: data expected after -o%s\n", argrest);
2741 /* -oMa: Set sender host address */
2743 if (Ustrcmp(argrest, "Ma") == 0) sender_host_address = argv[++i];
2745 /* -oMaa: Set authenticator name */
2747 else if (Ustrcmp(argrest, "Maa") == 0)
2748 sender_host_authenticated = argv[++i];
2750 /* -oMas: setting authenticated sender */
2752 else if (Ustrcmp(argrest, "Mas") == 0) authenticated_sender = argv[++i];
2754 /* -oMai: setting authenticated id */
2756 else if (Ustrcmp(argrest, "Mai") == 0) authenticated_id = argv[++i];
2758 /* -oMi: Set incoming interface address */
2760 else if (Ustrcmp(argrest, "Mi") == 0) interface_address = argv[++i];
2762 /* -oMr: Received protocol */
2764 else if (Ustrcmp(argrest, "Mr") == 0) received_protocol = argv[++i];
2766 /* -oMs: Set sender host name */
2768 else if (Ustrcmp(argrest, "Ms") == 0) sender_host_name = argv[++i];
2770 /* -oMt: Set sender ident */
2772 else if (Ustrcmp(argrest, "Mt") == 0)
2774 sender_ident_set = TRUE;
2775 sender_ident = argv[++i];
2778 /* Else a bad argument */
2787 /* -om: Me-too flag for aliases. Exim always does this. Some programs
2788 seem to call this as -m (undocumented), so that is also accepted (see
2791 else if (Ustrcmp(argrest, "m") == 0) {}
2793 /* -oo: An ancient flag for old-style addresses which still seems to
2794 crop up in some calls (see in SCO). */
2796 else if (Ustrcmp(argrest, "o") == 0) {}
2798 /* -oP <name>: set pid file path for daemon */
2800 else if (Ustrcmp(argrest, "P") == 0)
2801 override_pid_file_path = argv[++i];
2803 /* -or <n>: set timeout for non-SMTP acceptance
2804 -os <n>: set timeout for SMTP acceptance */
2806 else if (*argrest == 'r' || *argrest == 's')
2808 int *tp = (*argrest == 'r')?
2809 &arg_receive_timeout : &arg_smtp_receive_timeout;
2810 if (argrest[1] == 0)
2812 if (i+1 < argc) *tp= readconf_readtime(argv[++i], 0, FALSE);
2814 else *tp = readconf_readtime(argrest + 1, 0, FALSE);
2817 fprintf(stderr, "exim: bad time value %s: abandoned\n", argv[i]);
2822 /* -oX <list>: Override local_interfaces and/or default daemon ports */
2824 else if (Ustrcmp(argrest, "X") == 0)
2825 override_local_interfaces = argv[++i];
2827 /* Unknown -o argument */
2833 /* -ps: force Perl startup; -pd force delayed Perl startup */
2837 if (*argrest == 's' && argrest[1] == 0)
2839 perl_start_option = 1;
2842 if (*argrest == 'd' && argrest[1] == 0)
2844 perl_start_option = -1;
2849 /* -panythingelse is taken as the Sendmail-compatible argument -prval:sval,
2850 which sets the host protocol and host name */
2854 if (i+1 < argc) argrest = argv[++i]; else
2855 { badarg = TRUE; break; }
2860 uschar *hn = Ustrchr(argrest, ':');
2863 received_protocol = argrest;
2867 received_protocol = string_copyn(argrest, hn - argrest);
2868 sender_host_name = hn + 1;
2875 receiving_message = FALSE;
2876 if (queue_interval >= 0)
2878 fprintf(stderr, "exim: -q specified more than once\n");
2882 /* -qq...: Do queue runs in a 2-stage manner */
2884 if (*argrest == 'q')
2886 queue_2stage = TRUE;
2890 /* -qi...: Do only first (initial) deliveries */
2892 if (*argrest == 'i')
2894 queue_run_first_delivery = TRUE;
2898 /* -qf...: Run the queue, forcing deliveries
2899 -qff..: Ditto, forcing thawing as well */
2901 if (*argrest == 'f')
2903 queue_run_force = TRUE;
2904 if (*(++argrest) == 'f')
2906 deliver_force_thaw = TRUE;
2911 /* -q[f][f]l...: Run the queue only on local deliveries */
2913 if (*argrest == 'l')
2915 queue_run_local = TRUE;
2919 /* -q[f][f][l]: Run the queue, optionally forced, optionally local only,
2920 optionally starting from a given message id. */
2922 if (*argrest == 0 &&
2923 (i + 1 >= argc || argv[i+1][0] == '-' || mac_ismsgid(argv[i+1])))
2926 if (i+1 < argc && mac_ismsgid(argv[i+1]))
2927 start_queue_run_id = argv[++i];
2928 if (i+1 < argc && mac_ismsgid(argv[i+1]))
2929 stop_queue_run_id = argv[++i];
2932 /* -q[f][f][l]<n>: Run the queue at regular intervals, optionally forced,
2933 optionally local only. */
2938 queue_interval = readconf_readtime(argrest, 0, FALSE);
2940 queue_interval = readconf_readtime(argv[++i], 0, FALSE);
2941 if (queue_interval <= 0)
2943 fprintf(stderr, "exim: bad time value %s: abandoned\n", argv[i]);
2950 case 'R': /* Synonymous with -qR... */
2951 receiving_message = FALSE;
2953 /* -Rf: As -R (below) but force all deliveries,
2954 -Rff: Ditto, but also thaw all frozen messages,
2955 -Rr: String is regex
2956 -Rrf: Regex and force
2957 -Rrff: Regex and force and thaw
2959 in all cases provided there are no further characters in this
2965 for (i = 0; i < sizeof(rsopts)/sizeof(uschar *); i++)
2967 if (Ustrcmp(argrest, rsopts[i]) == 0)
2969 if (i != 2) queue_run_force = TRUE;
2970 if (i >= 2) deliver_selectstring_regex = TRUE;
2971 if (i == 1 || i == 4) deliver_force_thaw = TRUE;
2972 argrest += Ustrlen(rsopts[i]);
2977 /* -R: Set string to match in addresses for forced queue run to
2978 pick out particular messages. */
2982 if (i+1 < argc) deliver_selectstring = argv[++i]; else
2984 fprintf(stderr, "exim: string expected after -R\n");
2988 else deliver_selectstring = argrest;
2992 /* -r: an obsolete synonym for -f (see above) */
2995 /* -S: Like -R but works on sender. */
2997 case 'S': /* Synonymous with -qS... */
2998 receiving_message = FALSE;
3000 /* -Sf: As -S (below) but force all deliveries,
3001 -Sff: Ditto, but also thaw all frozen messages,
3002 -Sr: String is regex
3003 -Srf: Regex and force
3004 -Srff: Regex and force and thaw
3006 in all cases provided there are no further characters in this
3012 for (i = 0; i < sizeof(rsopts)/sizeof(uschar *); i++)
3014 if (Ustrcmp(argrest, rsopts[i]) == 0)
3016 if (i != 2) queue_run_force = TRUE;
3017 if (i >= 2) deliver_selectstring_sender_regex = TRUE;
3018 if (i == 1 || i == 4) deliver_force_thaw = TRUE;
3019 argrest += Ustrlen(rsopts[i]);
3024 /* -S: Set string to match in addresses for forced queue run to
3025 pick out particular messages. */
3029 if (i+1 < argc) deliver_selectstring_sender = argv[++i]; else
3031 fprintf(stderr, "exim: string expected after -S\n");
3035 else deliver_selectstring_sender = argrest;
3038 /* -Tqt is an option that is exclusively for use by the testing suite.
3039 It is not recognized in other circumstances. It allows for the setting up
3040 of explicit "queue times" so that various warning/retry things can be
3041 tested. Otherwise variability of clock ticks etc. cause problems. */
3044 if (running_in_test_harness && Ustrcmp(argrest, "qt") == 0)
3045 fudged_queue_times = argv[++i];
3050 /* -t: Set flag to extract recipients from body of message. */
3053 if (*argrest == 0) extract_recipients = TRUE;
3055 /* -ti: Set flag to extract recipients from body of message, and also
3056 specify that dot does not end the message. */
3058 else if (Ustrcmp(argrest, "i") == 0)
3060 extract_recipients = TRUE;
3064 /* -tls-on-connect: don't wait for STARTTLS (for old clients) */
3067 else if (Ustrcmp(argrest, "ls-on-connect") == 0) tls_on_connect = TRUE;
3074 /* -U: This means "initial user submission" in sendmail, apparently. The
3075 doc claims that in future sendmail may refuse syntactically invalid
3076 messages instead of fixing them. For the moment, we just ignore it. */
3082 /* -v: verify things - this is a very low-level debugging */
3087 debug_selector |= D_v;
3088 debug_file = stderr;
3094 /* -x: AIX uses this to indicate some fancy 8-bit character stuff:
3096 The -x flag tells the sendmail command that mail from a local
3097 mail program has National Language Support (NLS) extended characters
3098 in the body of the mail item. The sendmail command can send mail with
3099 extended NLS characters across networks that normally corrupts these
3102 As Exim is 8-bit clean, it just ignores this flag. */
3105 if (*argrest != 0) badarg = TRUE;
3108 /* All other initial characters are errors */
3113 } /* End of high-level switch statement */
3115 /* Failed to recognize the option, or syntax error */
3119 fprintf(stderr, "exim abandoned: unknown, malformed, or incomplete "
3120 "option %s\n", arg);
3126 /* If -R or -S have been specified without -q, assume a single queue run. */
3128 if ((deliver_selectstring != NULL || deliver_selectstring_sender != NULL) &&
3129 queue_interval < 0) queue_interval = 0;
3133 /* If usage_wanted is set we call the usage function - which never returns */
3134 if (usage_wanted) exim_usage(called_as);
3136 /* Arguments have been processed. Check for incompatibilities. */
3138 (smtp_input || extract_recipients || recipients_arg < argc) &&
3139 (daemon_listen || queue_interval >= 0 || bi_option ||
3140 test_retry_arg >= 0 || test_rewrite_arg >= 0 ||
3141 filter_test != FTEST_NONE || (msg_action_arg > 0 && !one_msg_action))
3144 msg_action_arg > 0 &&
3145 (daemon_listen || queue_interval >= 0 || list_options ||
3146 (checking && msg_action != MSG_LOAD) ||
3147 bi_option || test_retry_arg >= 0 || test_rewrite_arg >= 0)
3150 (daemon_listen || queue_interval >= 0) &&
3151 (sender_address != NULL || list_options || list_queue || checking ||
3155 daemon_listen && queue_interval == 0
3159 (checking || smtp_input || extract_recipients ||
3160 filter_test != FTEST_NONE || bi_option)
3163 verify_address_mode &&
3164 (address_test_mode || smtp_input || extract_recipients ||
3165 filter_test != FTEST_NONE || bi_option)
3168 address_test_mode && (smtp_input || extract_recipients ||
3169 filter_test != FTEST_NONE || bi_option)
3172 smtp_input && (sender_address != NULL || filter_test != FTEST_NONE ||
3176 deliver_selectstring != NULL && queue_interval < 0
3179 msg_action == MSG_LOAD &&
3180 (!expansion_test || expansion_test_message != NULL)
3184 fprintf(stderr, "exim: incompatible command-line options or arguments\n");
3188 /* If debugging is set up, set the file and the file descriptor to pass on to
3189 child processes. It should, of course, be 2 for stderr. Also, force the daemon
3190 to run in the foreground. */
3192 if (debug_selector != 0)
3194 debug_file = stderr;
3195 debug_fd = fileno(debug_file);
3196 background_daemon = FALSE;
3197 if (running_in_test_harness) millisleep(100); /* lets caller finish */
3198 if (debug_selector != D_v) /* -v only doesn't show this */
3200 debug_printf("Exim version %s uid=%ld gid=%ld pid=%d D=%x\n",
3201 version_string, (long int)real_uid, (long int)real_gid, (int)getpid(),
3203 if (!version_printed)
3204 show_whats_supported(stderr);
3208 /* When started with root privilege, ensure that the limits on the number of
3209 open files and the number of processes (where that is accessible) are
3210 sufficiently large, or are unset, in case Exim has been called from an
3211 environment where the limits are screwed down. Not all OS have the ability to
3212 change some of these limits. */
3216 DEBUG(D_any) debug_print_ids(US"Exim has no root privilege:");
3222 #ifdef RLIMIT_NOFILE
3223 if (getrlimit(RLIMIT_NOFILE, &rlp) < 0)
3225 log_write(0, LOG_MAIN|LOG_PANIC, "getrlimit(RLIMIT_NOFILE) failed: %s",
3227 rlp.rlim_cur = rlp.rlim_max = 0;
3230 /* I originally chose 1000 as a nice big number that was unlikely to
3231 be exceeded. It turns out that some older OS have a fixed upper limit of
3234 if (rlp.rlim_cur < 1000)
3236 rlp.rlim_cur = rlp.rlim_max = 1000;
3237 if (setrlimit(RLIMIT_NOFILE, &rlp) < 0)
3239 rlp.rlim_cur = rlp.rlim_max = 256;
3240 if (setrlimit(RLIMIT_NOFILE, &rlp) < 0)
3241 log_write(0, LOG_MAIN|LOG_PANIC, "setrlimit(RLIMIT_NOFILE) failed: %s",
3248 if (getrlimit(RLIMIT_NPROC, &rlp) < 0)
3250 log_write(0, LOG_MAIN|LOG_PANIC, "getrlimit(RLIMIT_NPROC) failed: %s",
3252 rlp.rlim_cur = rlp.rlim_max = 0;
3255 #ifdef RLIM_INFINITY
3256 if (rlp.rlim_cur != RLIM_INFINITY && rlp.rlim_cur < 1000)
3258 rlp.rlim_cur = rlp.rlim_max = RLIM_INFINITY;
3260 if (rlp.rlim_cur < 1000)
3262 rlp.rlim_cur = rlp.rlim_max = 1000;
3264 if (setrlimit(RLIMIT_NPROC, &rlp) < 0)
3265 log_write(0, LOG_MAIN|LOG_PANIC, "setrlimit(RLIMIT_NPROC) failed: %s",
3271 /* Exim is normally entered as root (but some special configurations are
3272 possible that don't do this). However, it always spins off sub-processes that
3273 set their uid and gid as required for local delivery. We don't want to pass on
3274 any extra groups that root may belong to, so we want to get rid of them all at
3277 We need to obey setgroups() at this stage, before possibly giving up root
3278 privilege for a changed configuration file, but later on we might need to
3279 check on the additional groups for the admin user privilege - can't do that
3280 till after reading the config, which might specify the exim gid. Therefore,
3281 save the group list here first. */
3283 group_count = getgroups(NGROUPS_MAX, group_list);
3285 /* There is a fundamental difference in some BSD systems in the matter of
3286 groups. FreeBSD and BSDI are known to be different; NetBSD and OpenBSD are
3287 known not to be different. On the "different" systems there is a single group
3288 list, and the first entry in it is the current group. On all other versions of
3289 Unix there is a supplementary group list, which is in *addition* to the current
3290 group. Consequently, to get rid of all extraneous groups on a "standard" system
3291 you pass over 0 groups to setgroups(), while on a "different" system you pass
3292 over a single group - the current group, which is always the first group in the
3293 list. Calling setgroups() with zero groups on a "different" system results in
3294 an error return. The following code should cope with both types of system.
3296 However, if this process isn't running as root, setgroups() can't be used
3297 since you have to be root to run it, even if throwing away groups. Not being
3298 root here happens only in some unusual configurations. We just ignore the
3301 if (setgroups(0, NULL) != 0)
3303 if (setgroups(1, group_list) != 0 && !unprivileged)
3305 fprintf(stderr, "exim: setgroups() failed: %s\n", strerror(errno));
3310 /* If the configuration file name has been altered by an argument on the
3311 command line (either a new file name or a macro definition) and the caller is
3312 not root, or if this is a filter testing run, remove any setuid privilege the
3313 program has and run as the underlying user.
3315 The exim user is locked out of this, which severely restricts the use of -C
3318 Otherwise, set the real ids to the effective values (should be root unless run
3319 from inetd, which it can either be root or the exim uid, if one is configured).
3321 There is a private mechanism for bypassing some of this, in order to make it
3322 possible to test lots of configurations automatically, without having either to
3323 recompile each time, or to patch in an actual configuration file name and other
3324 values (such as the path name). If running in the test harness, pretend that
3325 configuration file changes and macro definitions haven't happened. */
3328 (!trusted_config || /* Config changed, or */
3329 !macros_trusted()) && /* impermissible macros and */
3330 real_uid != root_uid && /* Not root, and */
3331 !running_in_test_harness /* Not fudged */
3333 expansion_test /* expansion testing */
3335 filter_test != FTEST_NONE) /* Filter testing */
3337 setgroups(group_count, group_list);
3338 exim_setugid(real_uid, real_gid, FALSE,
3339 US"-C, -D, -be or -bf forces real uid");
3340 removed_privilege = TRUE;
3342 /* In the normal case when Exim is called like this, stderr is available
3343 and should be used for any logging information because attempts to write
3344 to the log will usually fail. To arrange this, we unset really_exim. However,
3345 if no stderr is available there is no point - we might as well have a go
3346 at the log (if it fails, syslog will be written).
3348 Note that if the invoker is Exim, the logs remain available. Messing with
3349 this causes unlogged successful deliveries. */
3351 if ((log_stderr != NULL) && (real_uid != exim_uid))
3352 really_exim = FALSE;
3355 /* Privilege is to be retained for the moment. It may be dropped later,
3356 depending on the job that this Exim process has been asked to do. For now, set
3357 the real uid to the effective so that subsequent re-execs of Exim are done by a
3360 else exim_setugid(geteuid(), getegid(), FALSE, US"forcing real = effective");
3362 /* If testing a filter, open the file(s) now, before wasting time doing other
3363 setups and reading the message. */
3365 if ((filter_test & FTEST_SYSTEM) != 0)
3367 filter_sfd = Uopen(filter_test_sfile, O_RDONLY, 0);
3370 fprintf(stderr, "exim: failed to open %s: %s\n", filter_test_sfile,
3372 return EXIT_FAILURE;
3376 if ((filter_test & FTEST_USER) != 0)
3378 filter_ufd = Uopen(filter_test_ufile, O_RDONLY, 0);
3381 fprintf(stderr, "exim: failed to open %s: %s\n", filter_test_ufile,
3383 return EXIT_FAILURE;
3387 /* Read the main runtime configuration data; this gives up if there
3388 is a failure. It leaves the configuration file open so that the subsequent
3389 configuration data for delivery can be read if needed. */
3393 /* Handle the decoding of logging options. */
3395 decode_bits(&log_write_selector, &log_extra_selector, 0, 0,
3396 log_selector_string, log_options, log_options_count, US"log", 0);
3400 debug_printf("configuration file is %s\n", config_main_filename);
3401 debug_printf("log selectors = %08x %08x\n", log_write_selector,
3402 log_extra_selector);
3405 /* If domain literals are not allowed, check the sender address that was
3406 supplied with -f. Ditto for a stripped trailing dot. */
3408 if (sender_address != NULL)
3410 if (sender_address[sender_address_domain] == '[' && !allow_domain_literals)
3412 fprintf(stderr, "exim: bad -f address \"%s\": domain literals not "
3413 "allowed\n", sender_address);
3414 return EXIT_FAILURE;
3416 if (f_end_dot && !strip_trailing_dot)
3418 fprintf(stderr, "exim: bad -f address \"%s.\": domain is malformed "
3419 "(trailing dot not allowed)\n", sender_address);
3420 return EXIT_FAILURE;
3424 /* Paranoia check of maximum lengths of certain strings. There is a check
3425 on the length of the log file path in log.c, which will come into effect
3426 if there are any calls to write the log earlier than this. However, if we
3427 get this far but the string is very long, it is better to stop now than to
3428 carry on and (e.g.) receive a message and then have to collapse. The call to
3429 log_write() from here will cause the ultimate panic collapse if the complete
3430 file name exceeds the buffer length. */
3432 if (Ustrlen(log_file_path) > 200)
3433 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3434 "log_file_path is longer than 200 chars: aborting");
3436 if (Ustrlen(pid_file_path) > 200)
3437 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3438 "pid_file_path is longer than 200 chars: aborting");
3440 if (Ustrlen(spool_directory) > 200)
3441 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3442 "spool_directory is longer than 200 chars: aborting");
3444 /* Length check on the process name given to syslog for its TAG field,
3445 which is only permitted to be 32 characters or less. See RFC 3164. */
3447 if (Ustrlen(syslog_processname) > 32)
3448 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3449 "syslog_processname is longer than 32 chars: aborting");
3451 /* In some operating systems, the environment variable TMPDIR controls where
3452 temporary files are created; Exim doesn't use these (apart from when delivering
3453 to MBX mailboxes), but called libraries such as DBM libraries may require them.
3454 If TMPDIR is found in the environment, reset it to the value defined in the
3455 TMPDIR macro, if this macro is defined. */
3460 for (p = USS environ; *p != NULL; p++)
3462 if (Ustrncmp(*p, "TMPDIR=", 7) == 0 &&
3463 Ustrcmp(*p+7, TMPDIR) != 0)
3465 uschar *newp = malloc(Ustrlen(TMPDIR) + 8);
3466 sprintf(CS newp, "TMPDIR=%s", TMPDIR);
3468 DEBUG(D_any) debug_printf("reset TMPDIR=%s in environment\n", TMPDIR);
3474 /* Timezone handling. If timezone_string is "utc", set a flag to cause all
3475 timestamps to be in UTC (gmtime() is used instead of localtime()). Otherwise,
3476 we may need to get rid of a bogus timezone setting. This can arise when Exim is
3477 called by a user who has set the TZ variable. This then affects the timestamps
3478 in log files and in Received: headers, and any created Date: header lines. The
3479 required timezone is settable in the configuration file, so nothing can be done
3480 about this earlier - but hopefully nothing will normally be logged earlier than
3481 this. We have to make a new environment if TZ is wrong, but don't bother if
3482 timestamps_utc is set, because then all times are in UTC anyway. */
3484 if (timezone_string != NULL && strcmpic(timezone_string, US"UTC") == 0)
3486 timestamps_utc = TRUE;
3490 uschar *envtz = US getenv("TZ");
3491 if ((envtz == NULL && timezone_string != NULL) ||
3493 (timezone_string == NULL ||
3494 Ustrcmp(timezone_string, envtz) != 0)))
3496 uschar **p = USS environ;
3500 while (*p++ != NULL) count++;
3501 if (envtz == NULL) count++;
3502 newp = new = malloc(sizeof(uschar *) * (count + 1));
3503 for (p = USS environ; *p != NULL; p++)
3505 if (Ustrncmp(*p, "TZ=", 3) == 0) continue;
3508 if (timezone_string != NULL)
3510 *newp = malloc(Ustrlen(timezone_string) + 4);
3511 sprintf(CS *newp++, "TZ=%s", timezone_string);
3516 DEBUG(D_any) debug_printf("Reset TZ to %s: time is %s\n", timezone_string,
3517 tod_stamp(tod_log));
3521 /* Handle the case when we have removed the setuid privilege because of -C or
3522 -D. This means that the caller of Exim was not root.
3524 There is a problem if we were running as the Exim user. The sysadmin may
3525 expect this case to retain privilege because "the binary was called by the
3526 Exim user", but it hasn't, because either the -D option set macros, or the
3527 -C option set a non-trusted configuration file. There are two possibilities:
3529 (1) If deliver_drop_privilege is set, Exim is not going to re-exec in order
3530 to do message deliveries. Thus, the fact that it is running as a
3531 non-privileged user is plausible, and might be wanted in some special
3532 configurations. However, really_exim will have been set false when
3533 privilege was dropped, to stop Exim trying to write to its normal log
3534 files. Therefore, re-enable normal log processing, assuming the sysadmin
3535 has set up the log directory correctly.
3537 (2) If deliver_drop_privilege is not set, the configuration won't work as
3538 apparently intended, and so we log a panic message. In order to retain
3539 root for -C or -D, the caller must either be root or be invoking a
3540 trusted configuration file (when deliver_drop_privilege is false). */
3542 if (removed_privilege && (!trusted_config || macros != NULL) &&
3543 real_uid == exim_uid)
3545 if (deliver_drop_privilege)
3546 really_exim = TRUE; /* let logging work normally */
3548 log_write(0, LOG_MAIN|LOG_PANIC,
3549 "exim user lost privilege for using %s option",
3550 trusted_config? "-D" : "-C");
3553 /* Start up Perl interpreter if Perl support is configured and there is a
3554 perl_startup option, and the configuration or the command line specifies
3555 initializing starting. Note that the global variables are actually called
3556 opt_perl_xxx to avoid clashing with perl's namespace (perl_*). */
3559 if (perl_start_option != 0)
3560 opt_perl_at_start = (perl_start_option > 0);
3561 if (opt_perl_at_start && opt_perl_startup != NULL)
3564 DEBUG(D_any) debug_printf("Starting Perl interpreter\n");
3565 errstr = init_perl(opt_perl_startup);
3568 fprintf(stderr, "exim: error in perl_startup code: %s\n", errstr);
3569 return EXIT_FAILURE;
3571 opt_perl_started = TRUE;
3573 #endif /* EXIM_PERL */
3575 /* Initialise lookup_list
3576 If debugging, already called above via version reporting.
3577 This does mean that debugging causes the list to be initialised while root.
3578 This *should* be harmless -- all modules are loaded from a fixed dir and
3579 it's code that would, if not a module, be part of Exim already. */
3582 /* Log the arguments of the call if the configuration file said so. This is
3583 a debugging feature for finding out what arguments certain MUAs actually use.
3584 Don't attempt it if logging is disabled, or if listing variables or if
3585 verifying/testing addresses or expansions. */
3587 if (((debug_selector & D_any) != 0 || (log_extra_selector & LX_arguments) != 0)
3588 && really_exim && !list_options && !checking)
3591 uschar *p = big_buffer;
3593 (void)getcwd(CS p+4, big_buffer_size - 4);
3595 (void)string_format(p, big_buffer_size - (p - big_buffer), " %d args:", argc);
3597 for (i = 0; i < argc; i++)
3599 int len = Ustrlen(argv[i]);
3602 if (p + len + 8 >= big_buffer + big_buffer_size)
3605 log_write(0, LOG_MAIN, "%s", big_buffer);
3606 Ustrcpy(big_buffer, "...");
3609 printing = string_printing(argv[i]);
3610 if (printing[0] == 0) quote = US"\""; else
3612 uschar *pp = printing;
3614 while (*pp != 0) if (isspace(*pp++)) { quote = US"\""; break; }
3616 sprintf(CS p, " %s%.*s%s", quote, (int)(big_buffer_size -
3617 (p - big_buffer) - 4), printing, quote);
3621 if ((log_extra_selector & LX_arguments) != 0)
3622 log_write(0, LOG_MAIN, "%s", big_buffer);
3624 debug_printf("%s\n", big_buffer);
3627 /* Set the working directory to be the top-level spool directory. We don't rely
3628 on this in the code, which always uses fully qualified names, but it's useful
3629 for core dumps etc. Don't complain if it fails - the spool directory might not
3630 be generally accessible and calls with the -C option (and others) have lost
3631 privilege by now. Before the chdir, we try to ensure that the directory exists.
3634 if (Uchdir(spool_directory) != 0)
3636 (void)directory_make(spool_directory, US"", SPOOL_DIRECTORY_MODE, FALSE);
3637 (void)Uchdir(spool_directory);
3640 /* Handle calls with the -bi option. This is a sendmail option to rebuild *the*
3641 alias file. Exim doesn't have such a concept, but this call is screwed into
3642 Sun's YP makefiles. Handle this by calling a configured script, as the real
3643 user who called Exim. The -oA option can be used to pass an argument to the
3648 (void)fclose(config_file);
3649 if (bi_command != NULL)
3653 argv[i++] = bi_command;
3654 if (alias_arg != NULL) argv[i++] = alias_arg;
3657 setgroups(group_count, group_list);
3658 exim_setugid(real_uid, real_gid, FALSE, US"running bi_command");
3660 DEBUG(D_exec) debug_printf("exec %.256s %.256s\n", argv[0],
3661 (argv[1] == NULL)? US"" : argv[1]);
3663 execv(CS argv[0], (char *const *)argv);
3664 fprintf(stderr, "exim: exec failed: %s\n", strerror(errno));
3669 DEBUG(D_any) debug_printf("-bi used but bi_command not set; exiting\n");
3674 /* If an action on specific messages is requested, or if a daemon or queue
3675 runner is being started, we need to know if Exim was called by an admin user.
3676 This is the case if the real user is root or exim, or if the real group is
3677 exim, or if one of the supplementary groups is exim or a group listed in
3678 admin_groups. We don't fail all message actions immediately if not admin_user,
3679 since some actions can be performed by non-admin users. Instead, set admin_user
3680 for later interrogation. */
3682 if (real_uid == root_uid || real_uid == exim_uid || real_gid == exim_gid)
3687 for (i = 0; i < group_count; i++)
3689 if (group_list[i] == exim_gid) admin_user = TRUE;
3690 else if (admin_groups != NULL)
3692 for (j = 1; j <= (int)(admin_groups[0]); j++)
3693 if (admin_groups[j] == group_list[i])
3694 { admin_user = TRUE; break; }
3696 if (admin_user) break;
3700 /* Another group of privileged users are the trusted users. These are root,
3701 exim, and any caller matching trusted_users or trusted_groups. Trusted callers
3702 are permitted to specify sender_addresses with -f on the command line, and
3703 other message parameters as well. */
3705 if (real_uid == root_uid || real_uid == exim_uid)
3706 trusted_caller = TRUE;
3711 if (trusted_users != NULL)
3713 for (i = 1; i <= (int)(trusted_users[0]); i++)
3714 if (trusted_users[i] == real_uid)
3715 { trusted_caller = TRUE; break; }
3718 if (!trusted_caller && trusted_groups != NULL)
3720 for (i = 1; i <= (int)(trusted_groups[0]); i++)
3722 if (trusted_groups[i] == real_gid)
3723 trusted_caller = TRUE;
3724 else for (j = 0; j < group_count; j++)
3726 if (trusted_groups[i] == group_list[j])
3727 { trusted_caller = TRUE; break; }
3729 if (trusted_caller) break;
3734 if (trusted_caller) DEBUG(D_any) debug_printf("trusted user\n");
3735 if (admin_user) DEBUG(D_any) debug_printf("admin user\n");
3737 /* Only an admin user may start the daemon or force a queue run in the default
3738 configuration, but the queue run restriction can be relaxed. Only an admin
3739 user may request that a message be returned to its sender forthwith. Only an
3740 admin user may specify a debug level greater than D_v (because it might show
3741 passwords, etc. in lookup queries). Only an admin user may request a queue
3742 count. Only an admin user can use the test interface to scan for email
3743 (because Exim will be in the spool dir and able to look at mails). */
3747 BOOL debugset = (debug_selector & ~D_v) != 0;
3748 if (deliver_give_up || daemon_listen || malware_test_file ||
3749 (count_queue && queue_list_requires_admin) ||
3750 (list_queue && queue_list_requires_admin) ||
3751 (queue_interval >= 0 && prod_requires_admin) ||
3752 (debugset && !running_in_test_harness))
3754 fprintf(stderr, "exim:%s permission denied\n", debugset? " debugging" : "");
3759 /* If the real user is not root or the exim uid, the argument for passing
3760 in an open TCP/IP connection for another message is not permitted, nor is
3761 running with the -N option for any delivery action, unless this call to exim is
3762 one that supplied an input message, or we are using a patched exim for
3763 regression testing. */
3765 if (real_uid != root_uid && real_uid != exim_uid &&
3766 (continue_hostname != NULL ||
3768 (queue_interval >= 0 || daemon_listen || msg_action_arg > 0)
3769 )) && !running_in_test_harness)
3771 fprintf(stderr, "exim: Permission denied\n");
3772 return EXIT_FAILURE;
3775 /* If the caller is not trusted, certain arguments are ignored when running for
3776 real, but are permitted when checking things (-be, -bv, -bt, -bh, -bf, -bF).
3777 Note that authority for performing certain actions on messages is tested in the
3778 queue_action() function. */
3780 if (!trusted_caller && !checking && filter_test == FTEST_NONE)
3782 sender_host_name = sender_host_address = interface_address =
3783 sender_ident = received_protocol = NULL;
3784 sender_host_port = interface_port = 0;
3785 sender_host_authenticated = authenticated_sender = authenticated_id = NULL;
3788 /* If a sender host address is set, extract the optional port number off the
3789 end of it and check its syntax. Do the same thing for the interface address.
3790 Exim exits if the syntax is bad. */
3794 if (sender_host_address != NULL)
3795 sender_host_port = check_port(sender_host_address);
3796 if (interface_address != NULL)
3797 interface_port = check_port(interface_address);
3800 /* If an SMTP message is being received check to see if the standard input is a
3801 TCP/IP socket. If it is, we assume that Exim was called from inetd if the
3802 caller is root or the Exim user, or if the port is a privileged one. Otherwise,
3807 union sockaddr_46 inetd_sock;
3808 EXIM_SOCKLEN_T size = sizeof(inetd_sock);
3809 if (getpeername(0, (struct sockaddr *)(&inetd_sock), &size) == 0)
3811 int family = ((struct sockaddr *)(&inetd_sock))->sa_family;
3812 if (family == AF_INET || family == AF_INET6)
3814 union sockaddr_46 interface_sock;
3815 size = sizeof(interface_sock);
3817 if (getsockname(0, (struct sockaddr *)(&interface_sock), &size) == 0)
3818 interface_address = host_ntoa(-1, &interface_sock, NULL,
3821 if (host_is_tls_on_connect_port(interface_port)) tls_on_connect = TRUE;
3823 if (real_uid == root_uid || real_uid == exim_uid || interface_port < 1024)
3826 sender_host_address = host_ntoa(-1, (struct sockaddr *)(&inetd_sock),
3827 NULL, &sender_host_port);
3828 if (mua_wrapper) log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Input from "
3829 "inetd is not supported when mua_wrapper is set");
3834 "exim: Permission denied (unprivileged user, unprivileged port)\n");
3835 return EXIT_FAILURE;
3841 /* If the load average is going to be needed while receiving a message, get it
3842 now for those OS that require the first call to os_getloadavg() to be done as
3843 root. There will be further calls later for each message received. */
3845 #ifdef LOAD_AVG_NEEDS_ROOT
3846 if (receiving_message &&
3847 (queue_only_load >= 0 ||
3848 (is_inetd && smtp_load_reserve >= 0)
3851 load_average = OS_GETLOADAVG();
3855 /* The queue_only configuration option can be overridden by -odx on the command
3856 line, except that if queue_only_override is false, queue_only cannot be unset
3857 from the command line. */
3859 if (queue_only_set && (queue_only_override || arg_queue_only))
3860 queue_only = arg_queue_only;
3862 /* The receive_timeout and smtp_receive_timeout options can be overridden by
3865 if (arg_receive_timeout >= 0) receive_timeout = arg_receive_timeout;
3866 if (arg_smtp_receive_timeout >= 0)
3867 smtp_receive_timeout = arg_smtp_receive_timeout;
3869 /* If Exim was started with root privilege, unless we have already removed the
3870 root privilege above as a result of -C, -D, -be, -bf or -bF, remove it now
3871 except when starting the daemon or doing some kind of delivery or address
3872 testing (-bt). These are the only cases when root need to be retained. We run
3873 as exim for -bv and -bh. However, if deliver_drop_privilege is set, root is
3874 retained only for starting the daemon. We always do the initgroups() in this
3875 situation (controlled by the TRUE below), in order to be as close as possible
3876 to the state Exim usually runs in. */
3878 if (!unprivileged && /* originally had root AND */
3879 !removed_privilege && /* still got root AND */
3880 !daemon_listen && /* not starting the daemon */
3881 queue_interval <= 0 && /* (either kind of daemon) */
3883 deliver_drop_privilege || /* requested unprivileged */
3885 queue_interval < 0 && /* not running the queue */
3886 (msg_action_arg < 0 || /* and */
3887 msg_action != MSG_DELIVER) && /* not delivering and */
3888 (!checking || !address_test_mode) /* not address checking */
3892 exim_setugid(exim_uid, exim_gid, TRUE, US"privilege not needed");
3895 /* When we are retaining a privileged uid, we still change to the exim gid. */
3900 rv = setgid(exim_gid);
3901 /* Impact of failure is that some stuff might end up with an incorrect group.
3902 We track this for failures from root, since any attempt to change privilege
3903 by root should succeed and failures should be examined. For non-root,
3904 there's no security risk. For me, it's { exim -bV } on a just-built binary,
3905 no need to complain then. */
3908 if (!(unprivileged || removed_privilege))
3911 "exim: changing group failed: %s\n", strerror(errno));
3915 DEBUG(D_any) debug_printf("changing group to %ld failed: %s\n",
3916 (long int)exim_gid, strerror(errno));
3920 /* Handle a request to scan a file for malware */
3921 if (malware_test_file)
3923 #ifdef WITH_CONTENT_SCAN
3925 set_process_info("scanning file for malware");
3926 result = malware_in_file(malware_test_file);
3929 printf("No malware found.\n");
3934 printf("Malware lookup returned non-okay/fail: %d\n", result);
3938 printf("Malware found: %s\n", malware_name);
3940 printf("Malware scan detected malware of unknown name.\n");
3942 printf("Malware scanning not enabled at compile time.\n");
3947 /* Handle a request to list the delivery queue */
3951 set_process_info("listing the queue");
3952 queue_list(list_queue_option, argv + recipients_arg, argc - recipients_arg);
3956 /* Handle a request to count the delivery queue */
3960 set_process_info("counting the queue");
3965 /* Handle actions on specific messages, except for the force delivery and
3966 message load actions, which are done below. Some actions take a whole list of
3967 message ids, which are known to continue up to the end of the arguments. Others
3968 take a single message id and then operate on the recipients list. */
3970 if (msg_action_arg > 0 && msg_action != MSG_DELIVER && msg_action != MSG_LOAD)
3972 int yield = EXIT_SUCCESS;
3973 set_process_info("acting on specified messages");
3975 if (!one_msg_action)
3977 for (i = msg_action_arg; i < argc; i++)
3978 if (!queue_action(argv[i], msg_action, NULL, 0, 0))
3979 yield = EXIT_FAILURE;
3982 else if (!queue_action(argv[msg_action_arg], msg_action, argv, argc,
3983 recipients_arg)) yield = EXIT_FAILURE;
3987 /* All the modes below here require the remaining configuration sections
3988 to be read, except that we can skip over the ACL setting when delivering
3989 specific messages, or doing a queue run. (For various testing cases we could
3990 skip too, but as they are rare, it doesn't really matter.) The argument is TRUE
3993 readconf_rest(msg_action_arg > 0 || (queue_interval == 0 && !daemon_listen));
3995 /* The configuration data will have been read into POOL_PERM because we won't
3996 ever want to reset back past it. Change the current pool to POOL_MAIN. In fact,
3997 this is just a bit of pedantic tidiness. It wouldn't really matter if the
3998 configuration were read into POOL_MAIN, because we don't do any resets till
3999 later on. However, it seems right, and it does ensure that both pools get used.
4002 store_pool = POOL_MAIN;
4004 /* Handle the -brt option. This is for checking out retry configurations.
4005 The next three arguments are a domain name or a complete address, and
4006 optionally two error numbers. All it does is to call the function that
4007 scans the retry configuration data. */
4009 if (test_retry_arg >= 0)
4011 retry_config *yield;
4012 int basic_errno = 0;
4016 if (test_retry_arg >= argc)
4018 printf("-brt needs a domain or address argument\n");
4019 exim_exit(EXIT_FAILURE);
4021 s1 = argv[test_retry_arg++];
4024 /* If the first argument contains no @ and no . it might be a local user
4025 or it might be a single-component name. Treat as a domain. */
4027 if (Ustrchr(s1, '@') == NULL && Ustrchr(s1, '.') == NULL)
4029 printf("Warning: \"%s\" contains no '@' and no '.' characters. It is "
4030 "being \ntreated as a one-component domain, not as a local part.\n\n",
4034 /* There may be an optional second domain arg. */
4036 if (test_retry_arg < argc && Ustrchr(argv[test_retry_arg], '.') != NULL)
4037 s2 = argv[test_retry_arg++];
4039 /* The final arg is an error name */
4041 if (test_retry_arg < argc)
4043 uschar *ss = argv[test_retry_arg];
4045 readconf_retry_error(ss, ss + Ustrlen(ss), &basic_errno, &more_errno);
4048 printf("%s\n", CS error);
4049 return EXIT_FAILURE;
4052 /* For the {MAIL,RCPT,DATA}_4xx errors, a value of 255 means "any", and a
4053 code > 100 as an error is for matching codes to the decade. Turn them into
4054 a real error code, off the decade. */
4056 if (basic_errno == ERRNO_MAIL4XX ||
4057 basic_errno == ERRNO_RCPT4XX ||
4058 basic_errno == ERRNO_DATA4XX)
4060 int code = (more_errno >> 8) & 255;
4062 more_errno = (more_errno & 0xffff00ff) | (21 << 8);
4063 else if (code > 100)
4064 more_errno = (more_errno & 0xffff00ff) | ((code - 96) << 8);
4068 yield = retry_find_config(s1, s2, basic_errno, more_errno);
4069 if (yield == NULL) printf("No retry information found\n"); else
4072 more_errno = yield->more_errno;
4073 printf("Retry rule: %s ", yield->pattern);
4075 if (yield->basic_errno == ERRNO_EXIMQUOTA)
4077 printf("quota%s%s ",
4078 (more_errno > 0)? "_" : "",
4079 (more_errno > 0)? readconf_printtime(more_errno) : US"");
4081 else if (yield->basic_errno == ECONNREFUSED)
4083 printf("refused%s%s ",
4084 (more_errno > 0)? "_" : "",
4085 (more_errno == 'M')? "MX" :
4086 (more_errno == 'A')? "A" : "");
4088 else if (yield->basic_errno == ETIMEDOUT)
4091 if ((more_errno & RTEF_CTOUT) != 0) printf("_connect");
4093 if (more_errno != 0) printf("_%s",
4094 (more_errno == 'M')? "MX" : "A");
4097 else if (yield->basic_errno == ERRNO_AUTHFAIL)
4098 printf("auth_failed ");
4101 for (r = yield->rules; r != NULL; r = r->next)
4103 printf("%c,%s", r->rule, readconf_printtime(r->timeout)); /* Do not */
4104 printf(",%s", readconf_printtime(r->p1)); /* amalgamate */
4110 printf(",%d.", x/1000);
4124 exim_exit(EXIT_SUCCESS);
4127 /* Handle a request to list one or more configuration options */
4131 set_process_info("listing variables");
4132 if (recipients_arg >= argc) readconf_print(US"all", NULL);
4133 else for (i = recipients_arg; i < argc; i++)
4136 (Ustrcmp(argv[i], "router") == 0 ||
4137 Ustrcmp(argv[i], "transport") == 0 ||
4138 Ustrcmp(argv[i], "authenticator") == 0 ||
4139 Ustrcmp(argv[i], "macro") == 0))
4141 readconf_print(argv[i+1], argv[i]);
4144 else readconf_print(argv[i], NULL);
4146 exim_exit(EXIT_SUCCESS);
4150 /* Handle a request to deliver one or more messages that are already on the
4151 queue. Values of msg_action other than MSG_DELIVER and MSG_LOAD are dealt with
4152 above. MSG_LOAD is handled with -be (which is the only time it applies) below.
4154 Delivery of specific messages is typically used for a small number when
4155 prodding by hand (when the option forced_delivery will be set) or when
4156 re-execing to regain root privilege. Each message delivery must happen in a
4157 separate process, so we fork a process for each one, and run them sequentially
4158 so that debugging output doesn't get intertwined, and to avoid spawning too
4159 many processes if a long list is given. However, don't fork for the last one;
4160 this saves a process in the common case when Exim is called to deliver just one
4163 if (msg_action_arg > 0 && msg_action != MSG_LOAD)
4165 if (prod_requires_admin && !admin_user)
4167 fprintf(stderr, "exim: Permission denied\n");
4168 exim_exit(EXIT_FAILURE);
4170 set_process_info("delivering specified messages");
4171 if (deliver_give_up) forced_delivery = deliver_force_thaw = TRUE;
4172 for (i = msg_action_arg; i < argc; i++)
4177 (void)deliver_message(argv[i], forced_delivery, deliver_give_up);
4178 else if ((pid = fork()) == 0)
4180 (void)deliver_message(argv[i], forced_delivery, deliver_give_up);
4181 _exit(EXIT_SUCCESS);
4185 fprintf(stderr, "failed to fork delivery process for %s: %s\n", argv[i],
4187 exim_exit(EXIT_FAILURE);
4191 exim_exit(EXIT_SUCCESS);
4195 /* If only a single queue run is requested, without SMTP listening, we can just
4196 turn into a queue runner, with an optional starting message id. */
4198 if (queue_interval == 0 && !daemon_listen)
4200 DEBUG(D_queue_run) debug_printf("Single queue run%s%s%s%s\n",
4201 (start_queue_run_id == NULL)? US"" : US" starting at ",
4202 (start_queue_run_id == NULL)? US"" : start_queue_run_id,
4203 (stop_queue_run_id == NULL)? US"" : US" stopping at ",
4204 (stop_queue_run_id == NULL)? US"" : stop_queue_run_id);
4205 set_process_info("running the queue (single queue run)");
4206 queue_run(start_queue_run_id, stop_queue_run_id, FALSE);
4207 exim_exit(EXIT_SUCCESS);
4211 /* Find the login name of the real user running this process. This is always
4212 needed when receiving a message, because it is written into the spool file. It
4213 may also be used to construct a from: or a sender: header, and in this case we
4214 need the user's full name as well, so save a copy of it, checked for RFC822
4215 syntax and munged if necessary, if it hasn't previously been set by the -F
4216 argument. We may try to get the passwd entry more than once, in case NIS or
4217 other delays are in evidence. Save the home directory for use in filter testing
4222 if ((pw = getpwuid(real_uid)) != NULL)
4224 originator_login = string_copy(US pw->pw_name);
4225 originator_home = string_copy(US pw->pw_dir);
4227 /* If user name has not been set by -F, set it from the passwd entry
4228 unless -f has been used to set the sender address by a trusted user. */
4230 if (originator_name == NULL)
4232 if (sender_address == NULL ||
4233 (!trusted_caller && filter_test == FTEST_NONE))
4235 uschar *name = US pw->pw_gecos;
4236 uschar *amp = Ustrchr(name, '&');
4239 /* Most Unix specify that a '&' character in the gecos field is
4240 replaced by a copy of the login name, and some even specify that
4241 the first character should be upper cased, so that's what we do. */
4246 string_format(buffer, sizeof(buffer), "%.*s%n%s%s",
4247 amp - name, name, &loffset, originator_login, amp + 1);
4248 buffer[loffset] = toupper(buffer[loffset]);
4252 /* If a pattern for matching the gecos field was supplied, apply
4253 it and then expand the name string. */
4255 if (gecos_pattern != NULL && gecos_name != NULL)
4258 re = regex_must_compile(gecos_pattern, FALSE, TRUE); /* Use malloc */
4260 if (regex_match_and_setup(re, name, 0, -1))
4262 uschar *new_name = expand_string(gecos_name);
4264 if (new_name != NULL)
4266 DEBUG(D_receive) debug_printf("user name \"%s\" extracted from "
4267 "gecos field \"%s\"\n", new_name, name);
4270 else DEBUG(D_receive) debug_printf("failed to expand gecos_name string "
4271 "\"%s\": %s\n", gecos_name, expand_string_message);
4273 else DEBUG(D_receive) debug_printf("gecos_pattern \"%s\" did not match "
4274 "gecos field \"%s\"\n", gecos_pattern, name);
4275 store_free((void *)re);
4277 originator_name = string_copy(name);
4280 /* A trusted caller has used -f but not -F */
4282 else originator_name = US"";
4285 /* Break the retry loop */
4290 if (++i > finduser_retries) break;
4294 /* If we cannot get a user login, log the incident and give up, unless the
4295 configuration specifies something to use. When running in the test harness,
4296 any setting of unknown_login overrides the actual name. */
4298 if (originator_login == NULL || running_in_test_harness)
4300 if (unknown_login != NULL)
4302 originator_login = expand_string(unknown_login);
4303 if (originator_name == NULL && unknown_username != NULL)
4304 originator_name = expand_string(unknown_username);
4305 if (originator_name == NULL) originator_name = US"";
4307 if (originator_login == NULL)
4308 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Failed to get user name for uid %d",
4312 /* Ensure that the user name is in a suitable form for use as a "phrase" in an
4315 originator_name = string_copy(parse_fix_phrase(originator_name,
4316 Ustrlen(originator_name), big_buffer, big_buffer_size));
4318 /* If a message is created by this call of Exim, the uid/gid of its originator
4319 are those of the caller. These values are overridden if an existing message is
4320 read in from the spool. */
4322 originator_uid = real_uid;
4323 originator_gid = real_gid;
4325 DEBUG(D_receive) debug_printf("originator: uid=%d gid=%d login=%s name=%s\n",
4326 (int)originator_uid, (int)originator_gid, originator_login, originator_name);
4328 /* Run in daemon and/or queue-running mode. The function daemon_go() never
4329 returns. We leave this till here so that the originator_ fields are available
4330 for incoming messages via the daemon. The daemon cannot be run in mua_wrapper
4333 if (daemon_listen || queue_interval > 0)
4337 fprintf(stderr, "Daemon cannot be run when mua_wrapper is set\n");
4338 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Daemon cannot be run when "
4339 "mua_wrapper is set");
4344 /* If the sender ident has not been set (by a trusted caller) set it to
4345 the caller. This will get overwritten below for an inetd call. If a trusted
4346 caller has set it empty, unset it. */
4348 if (sender_ident == NULL) sender_ident = originator_login;
4349 else if (sender_ident[0] == 0) sender_ident = NULL;
4351 /* Handle the -brw option, which is for checking out rewriting rules. Cause log
4352 writes (on errors) to go to stderr instead. Can't do this earlier, as want the
4353 originator_* variables set. */
4355 if (test_rewrite_arg >= 0)
4357 really_exim = FALSE;
4358 if (test_rewrite_arg >= argc)
4360 printf("-brw needs an address argument\n");
4361 exim_exit(EXIT_FAILURE);
4363 rewrite_test(argv[test_rewrite_arg]);
4364 exim_exit(EXIT_SUCCESS);
4367 /* A locally-supplied message is considered to be coming from a local user
4368 unless a trusted caller supplies a sender address with -f, or is passing in the
4369 message via SMTP (inetd invocation or otherwise). */
4371 if ((sender_address == NULL && !smtp_input) ||
4372 (!trusted_caller && filter_test == FTEST_NONE))
4374 sender_local = TRUE;
4376 /* A trusted caller can supply authenticated_sender and authenticated_id
4377 via -oMas and -oMai and if so, they will already be set. Otherwise, force
4378 defaults except when host checking. */
4380 if (authenticated_sender == NULL && !host_checking)
4381 authenticated_sender = string_sprintf("%s@%s", originator_login,
4382 qualify_domain_sender);
4383 if (authenticated_id == NULL && !host_checking)
4384 authenticated_id = originator_login;
4387 /* Trusted callers are always permitted to specify the sender address.
4388 Untrusted callers may specify it if it matches untrusted_set_sender, or if what
4389 is specified is the empty address. However, if a trusted caller does not
4390 specify a sender address for SMTP input, we leave sender_address unset. This
4391 causes the MAIL commands to be honoured. */
4393 if ((!smtp_input && sender_address == NULL) ||
4394 !receive_check_set_sender(sender_address))
4396 /* Either the caller is not permitted to set a general sender, or this is
4397 non-SMTP input and the trusted caller has not set a sender. If there is no
4398 sender, or if a sender other than <> is set, override with the originator's
4399 login (which will get qualified below), except when checking things. */
4401 if (sender_address == NULL /* No sender_address set */
4403 (sender_address[0] != 0 && /* Non-empty sender address, AND */
4404 !checking && /* Not running tests, AND */
4405 filter_test == FTEST_NONE)) /* Not testing a filter */
4407 sender_address = originator_login;
4408 sender_address_forced = FALSE;
4409 sender_address_domain = 0;
4413 /* Remember whether an untrusted caller set the sender address */
4415 sender_set_untrusted = sender_address != originator_login && !trusted_caller;
4417 /* Ensure that the sender address is fully qualified unless it is the empty
4418 address, which indicates an error message, or doesn't exist (root caller, smtp
4419 interface, no -f argument). */
4421 if (sender_address != NULL && sender_address[0] != 0 &&
4422 sender_address_domain == 0)
4423 sender_address = string_sprintf("%s@%s", local_part_quote(sender_address),
4424 qualify_domain_sender);
4426 DEBUG(D_receive) debug_printf("sender address = %s\n", sender_address);
4428 /* Handle a request to verify a list of addresses, or test them for delivery.
4429 This must follow the setting of the sender address, since routers can be
4430 predicated upon the sender. If no arguments are given, read addresses from
4431 stdin. Set debug_level to at least D_v to get full output for address testing.
4434 if (verify_address_mode || address_test_mode)
4437 int flags = vopt_qualify;
4439 if (verify_address_mode)
4441 if (!verify_as_sender) flags |= vopt_is_recipient;
4442 DEBUG(D_verify) debug_print_ids(US"Verifying:");
4447 flags |= vopt_is_recipient;
4448 debug_selector |= D_v;
4449 debug_file = stderr;
4450 debug_fd = fileno(debug_file);
4451 DEBUG(D_verify) debug_print_ids(US"Address testing:");
4454 if (recipients_arg < argc)
4456 while (recipients_arg < argc)
4458 uschar *s = argv[recipients_arg++];
4461 BOOL finished = FALSE;
4462 uschar *ss = parse_find_address_end(s, FALSE);
4463 if (*ss == ',') *ss = 0; else finished = TRUE;
4464 test_address(s, flags, &exit_value);
4467 while (*(++s) != 0 && (*s == ',' || isspace(*s)));
4474 uschar *s = get_stdinput(NULL, NULL);
4475 if (s == NULL) break;
4476 test_address(s, flags, &exit_value);
4480 exim_exit(exit_value);
4483 /* Handle expansion checking. Either expand items on the command line, or read
4484 from stdin if there aren't any. If -Mset was specified, load the message so
4485 that its variables can be used, but restrict this facility to admin users.
4486 Otherwise, if -bem was used, read a message from stdin. */
4490 if (msg_action_arg > 0 && msg_action == MSG_LOAD)
4492 uschar spoolname[256]; /* Not big_buffer; used in spool_read_header() */
4495 fprintf(stderr, "exim: permission denied\n");
4498 message_id = argv[msg_action_arg];
4499 (void)string_format(spoolname, sizeof(spoolname), "%s-H", message_id);
4500 if (!spool_open_datafile(message_id))
4501 printf ("Failed to load message datafile %s\n", message_id);
4502 if (spool_read_header(spoolname, TRUE, FALSE) != spool_read_OK)
4503 printf ("Failed to load message %s\n", message_id);
4506 /* Read a test message from a file. We fudge it up to be on stdin, saving
4507 stdin itself for later reading of expansion strings. */
4509 else if (expansion_test_message != NULL)
4511 int save_stdin = dup(0);
4512 int fd = Uopen(expansion_test_message, O_RDONLY, 0);
4515 fprintf(stderr, "exim: failed to open %s: %s\n", expansion_test_message,
4517 return EXIT_FAILURE;
4520 filter_test = FTEST_USER; /* Fudge to make it look like filter test */
4521 message_ended = END_NOTENDED;
4522 read_message_body(receive_msg(extract_recipients));
4523 message_linecount += body_linecount;
4524 (void)dup2(save_stdin, 0);
4525 (void)close(save_stdin);
4526 clearerr(stdin); /* Required by Darwin */
4529 /* Allow $recipients for this testing */
4531 enable_dollar_recipients = TRUE;
4533 /* Expand command line items */
4535 if (recipients_arg < argc)
4537 while (recipients_arg < argc)
4539 uschar *s = argv[recipients_arg++];
4540 uschar *ss = expand_string(s);
4541 if (ss == NULL) printf ("Failed: %s\n", expand_string_message);
4542 else printf("%s\n", CS ss);
4550 char *(*fn_readline)(char *) = NULL;
4551 char *(*fn_addhist)(char *) = NULL;
4554 void *dlhandle = set_readline(&fn_readline, &fn_addhist);
4560 uschar *source = get_stdinput(fn_readline, fn_addhist);
4561 if (source == NULL) break;
4562 ss = expand_string(source);
4564 printf ("Failed: %s\n", expand_string_message);
4565 else printf("%s\n", CS ss);
4569 if (dlhandle != NULL) dlclose(dlhandle);
4573 /* The data file will be open after -Mset */
4575 if (deliver_datafile >= 0)
4577 (void)close(deliver_datafile);
4578 deliver_datafile = -1;
4581 exim_exit(EXIT_SUCCESS);
4585 /* The active host name is normally the primary host name, but it can be varied
4586 for hosts that want to play several parts at once. We need to ensure that it is
4587 set for host checking, and for receiving messages. */
4589 smtp_active_hostname = primary_hostname;
4590 if (raw_active_hostname != NULL)
4592 uschar *nah = expand_string(raw_active_hostname);
4595 if (!expand_string_forcedfail)
4596 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to expand \"%s\" "
4597 "(smtp_active_hostname): %s", raw_active_hostname,
4598 expand_string_message);
4600 else if (nah[0] != 0) smtp_active_hostname = nah;
4603 /* Handle host checking: this facility mocks up an incoming SMTP call from a
4604 given IP address so that the blocking and relay configuration can be tested.
4605 Unless a sender_ident was set by -oMt, we discard it (the default is the
4606 caller's login name). An RFC 1413 call is made only if we are running in the
4607 test harness and an incoming interface and both ports are specified, because
4608 there is no TCP/IP call to find the ident for. */
4615 if (!sender_ident_set)
4617 sender_ident = NULL;
4618 if (running_in_test_harness && sender_host_port != 0 &&
4619 interface_address != NULL && interface_port != 0)
4620 verify_get_ident(1413);
4623 /* In case the given address is a non-canonical IPv6 address, canonicize
4624 it. The code works for both IPv4 and IPv6, as it happens. */
4626 size = host_aton(sender_host_address, x);
4627 sender_host_address = store_get(48); /* large enough for full IPv6 */
4628 (void)host_nmtoa(size, x, -1, sender_host_address, ':');
4630 /* Now set up for testing */
4632 host_build_sender_fullhost();
4636 sender_local = FALSE;
4637 sender_host_notsocket = TRUE;
4638 debug_file = stderr;
4639 debug_fd = fileno(debug_file);
4640 fprintf(stdout, "\n**** SMTP testing session as if from host %s\n"
4641 "**** but without any ident (RFC 1413) callback.\n"
4642 "**** This is not for real!\n\n",
4643 sender_host_address);
4645 if (verify_check_host(&hosts_connection_nolog) == OK)
4646 log_write_selector &= ~L_smtp_connection;
4647 log_write(L_smtp_connection, LOG_MAIN, "%s", smtp_get_connection_info());
4649 /* NOTE: We do *not* call smtp_log_no_mail() if smtp_start_session() fails,
4650 because a log line has already been written for all its failure exists
4651 (usually "connection refused: <reason>") and writing another one is
4652 unnecessary clutter. */
4654 if (smtp_start_session())
4656 reset_point = store_get(0);
4659 store_reset(reset_point);
4660 if (smtp_setup_msg() <= 0) break;
4661 if (!receive_msg(FALSE)) break;
4665 exim_exit(EXIT_SUCCESS);
4669 /* Arrange for message reception if recipients or SMTP were specified;
4670 otherwise complain unless a version print (-bV) happened or this is a filter
4671 verification test. In the former case, show the configuration file name. */
4673 if (recipients_arg >= argc && !extract_recipients && !smtp_input)
4675 if (version_printed)
4677 printf("Configuration file is %s\n", config_main_filename);
4678 return EXIT_SUCCESS;
4681 if (filter_test == FTEST_NONE)
4682 exim_usage(called_as);
4686 /* If mua_wrapper is set, Exim is being used to turn an MUA that submits on the
4687 standard input into an MUA that submits to a smarthost over TCP/IP. We know
4688 that we are not called from inetd, because that is rejected above. The
4689 following configuration settings are forced here:
4691 (1) Synchronous delivery (-odi)
4692 (2) Errors to stderr (-oep == -oeq)
4693 (3) No parallel remote delivery
4694 (4) Unprivileged delivery
4696 We don't force overall queueing options because there are several of them;
4697 instead, queueing is avoided below when mua_wrapper is set. However, we do need
4698 to override any SMTP queueing. */
4702 synchronous_delivery = TRUE;
4703 arg_error_handling = ERRORS_STDERR;
4704 remote_max_parallel = 1;
4705 deliver_drop_privilege = TRUE;
4707 queue_smtp_domains = NULL;
4711 /* Prepare to accept one or more new messages on the standard input. When a
4712 message has been read, its id is returned in message_id[]. If doing immediate
4713 delivery, we fork a delivery process for each received message, except for the
4714 last one, where we can save a process switch.
4716 It is only in non-smtp mode that error_handling is allowed to be changed from
4717 its default of ERRORS_SENDER by argument. (Idle thought: are any of the
4718 sendmail error modes other than -oem ever actually used? Later: yes.) */
4720 if (!smtp_input) error_handling = arg_error_handling;
4722 /* If this is an inetd call, ensure that stderr is closed to prevent panic
4723 logging being sent down the socket and make an identd call to get the
4728 (void)fclose(stderr);
4729 exim_nullstd(); /* Re-open to /dev/null */
4730 verify_get_ident(IDENT_PORT);
4731 host_build_sender_fullhost();
4732 set_process_info("handling incoming connection from %s via inetd",
4736 /* If the sender host address has been set, build sender_fullhost if it hasn't
4737 already been done (which it will have been for inetd). This caters for the
4738 case when it is forced by -oMa. However, we must flag that it isn't a socket,
4739 so that the test for IP options is skipped for -bs input. */
4741 if (sender_host_address != NULL && sender_fullhost == NULL)
4743 host_build_sender_fullhost();
4744 set_process_info("handling incoming connection from %s via -oMa",
4746 sender_host_notsocket = TRUE;
4749 /* Otherwise, set the sender host as unknown except for inetd calls. This
4750 prevents host checking in the case of -bs not from inetd and also for -bS. */
4752 else if (!is_inetd) sender_host_unknown = TRUE;
4754 /* If stdout does not exist, then dup stdin to stdout. This can happen
4755 if exim is started from inetd. In this case fd 0 will be set to the socket,
4756 but fd 1 will not be set. This also happens for passed SMTP channels. */
4758 if (fstat(1, &statbuf) < 0) (void)dup2(0, 1);
4760 /* Set up the incoming protocol name and the state of the program. Root is
4761 allowed to force received protocol via the -oMr option above. If we have come
4762 via inetd, the process info has already been set up. We don't set
4763 received_protocol here for smtp input, as it varies according to
4764 batch/HELO/EHLO/AUTH/TLS. */
4768 if (!is_inetd) set_process_info("accepting a local %sSMTP message from <%s>",
4769 smtp_batched_input? "batched " : "",
4770 (sender_address!= NULL)? sender_address : originator_login);
4774 if (received_protocol == NULL)
4775 received_protocol = string_sprintf("local%s", called_as);
4776 set_process_info("accepting a local non-SMTP message from <%s>",
4780 /* Initialize the session_local_queue-only flag (this will be ignored if
4781 mua_wrapper is set) */
4784 session_local_queue_only = queue_only;
4786 /* For non-SMTP and for batched SMTP input, check that there is enough space on
4787 the spool if so configured. On failure, we must not attempt to send an error
4788 message! (For interactive SMTP, the check happens at MAIL FROM and an SMTP
4789 error code is given.) */
4791 if ((!smtp_input || smtp_batched_input) && !receive_check_fs(0))
4793 fprintf(stderr, "exim: insufficient disk space\n");
4794 return EXIT_FAILURE;
4797 /* If this is smtp input of any kind, real or batched, handle the start of the
4800 NOTE: We do *not* call smtp_log_no_mail() if smtp_start_session() fails,
4801 because a log line has already been written for all its failure exists
4802 (usually "connection refused: <reason>") and writing another one is
4803 unnecessary clutter. */
4809 if (verify_check_host(&hosts_connection_nolog) == OK)
4810 log_write_selector &= ~L_smtp_connection;
4811 log_write(L_smtp_connection, LOG_MAIN, "%s", smtp_get_connection_info());
4812 if (!smtp_start_session())
4815 exim_exit(EXIT_SUCCESS);
4819 /* Otherwise, set up the input size limit here. */
4823 thismessage_size_limit = expand_string_integer(message_size_limit, TRUE);
4824 if (expand_string_message != NULL)
4826 if (thismessage_size_limit == -1)
4827 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to expand "
4828 "message_size_limit: %s", expand_string_message);
4830 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "invalid value for "
4831 "message_size_limit: %s", expand_string_message);
4835 /* Loop for several messages when reading SMTP input. If we fork any child
4836 processes, we don't want to wait for them unless synchronous delivery is
4837 requested, so set SIGCHLD to SIG_IGN in that case. This is not necessarily the
4838 same as SIG_DFL, despite the fact that documentation often lists the default as
4839 "ignore". This is a confusing area. This is what I know:
4841 At least on some systems (e.g. Solaris), just setting SIG_IGN causes child
4842 processes that complete simply to go away without ever becoming defunct. You
4843 can't then wait for them - but we don't want to wait for them in the
4844 non-synchronous delivery case. However, this behaviour of SIG_IGN doesn't
4845 happen for all OS (e.g. *BSD is different).
4847 But that's not the end of the story. Some (many? all?) systems have the
4848 SA_NOCLDWAIT option for sigaction(). This requests the behaviour that Solaris
4849 has by default, so it seems that the difference is merely one of default
4850 (compare restarting vs non-restarting signals).
4852 To cover all cases, Exim sets SIG_IGN with SA_NOCLDWAIT here if it can. If not,
4853 it just sets SIG_IGN. To be on the safe side it also calls waitpid() at the end
4854 of the loop below. Paranoia rules.
4856 February 2003: That's *still* not the end of the story. There are now versions
4857 of Linux (where SIG_IGN does work) that are picky. If, having set SIG_IGN, a
4858 process then calls waitpid(), a grumble is written to the system log, because
4859 this is logically inconsistent. In other words, it doesn't like the paranoia.
4860 As a consequenc of this, the waitpid() below is now excluded if we are sure
4861 that SIG_IGN works. */
4863 if (!synchronous_delivery)
4866 struct sigaction act;
4867 act.sa_handler = SIG_IGN;
4868 sigemptyset(&(act.sa_mask));
4869 act.sa_flags = SA_NOCLDWAIT;
4870 sigaction(SIGCHLD, &act, NULL);
4872 signal(SIGCHLD, SIG_IGN);
4876 /* Save the current store pool point, for resetting at the start of
4877 each message, and save the real sender address, if any. */
4879 reset_point = store_get(0);
4880 real_sender_address = sender_address;
4882 /* Loop to receive messages; receive_msg() returns TRUE if there are more
4883 messages to be read (SMTP input), or FALSE otherwise (not SMTP, or SMTP channel
4888 store_reset(reset_point);
4891 /* Handle the SMTP case; call smtp_setup_mst() to deal with the initial SMTP
4892 input and build the recipients list, before calling receive_msg() to read the
4893 message proper. Whatever sender address is given in the SMTP transaction is
4894 often ignored for local senders - we use the actual sender, which is normally
4895 either the underlying user running this process or a -f argument provided by
4896 a trusted caller. It is saved in real_sender_address. The test for whether to
4897 accept the SMTP sender is encapsulated in receive_check_set_sender(). */
4902 if ((rc = smtp_setup_msg()) > 0)
4904 if (real_sender_address != NULL &&
4905 !receive_check_set_sender(sender_address))
4907 sender_address = raw_sender = real_sender_address;
4908 sender_address_unrewritten = NULL;
4911 /* For batched SMTP, we have to run the acl_not_smtp_start ACL, since it
4912 isn't really SMTP, so no other ACL will run until the acl_not_smtp one at
4913 the very end. The result of the ACL is ignored (as for other non-SMTP
4914 messages). It is run for its potential side effects. */
4916 if (smtp_batched_input && acl_not_smtp_start != NULL)
4918 uschar *user_msg, *log_msg;
4919 enable_dollar_recipients = TRUE;
4920 (void)acl_check(ACL_WHERE_NOTSMTP_START, NULL, acl_not_smtp_start,
4921 &user_msg, &log_msg);
4922 enable_dollar_recipients = FALSE;
4925 /* Now get the data for the message */
4927 more = receive_msg(extract_recipients);
4928 if (message_id[0] == 0)
4931 smtp_log_no_mail(); /* Log no mail if configured */
4932 exim_exit(EXIT_FAILURE);
4937 smtp_log_no_mail(); /* Log no mail if configured */
4938 exim_exit((rc == 0)? EXIT_SUCCESS : EXIT_FAILURE);
4942 /* In the non-SMTP case, we have all the information from the command
4943 line, but must process it in case it is in the more general RFC822
4944 format, and in any case, to detect syntax errors. Also, it appears that
4945 the use of comma-separated lists as single arguments is common, so we
4946 had better support them. */
4952 int count = argc - recipients_arg;
4953 uschar **list = argv + recipients_arg;
4955 /* These options cannot be changed dynamically for non-SMTP messages */
4957 active_local_sender_retain = local_sender_retain;
4958 active_local_from_check = local_from_check;
4960 /* Save before any rewriting */
4962 raw_sender = string_copy(sender_address);
4964 /* Loop for each argument */
4966 for (i = 0; i < count; i++)
4968 int start, end, domain;
4970 uschar *s = list[i];
4972 /* Loop for each comma-separated address */
4976 BOOL finished = FALSE;
4978 uschar *ss = parse_find_address_end(s, FALSE);
4980 if (*ss == ',') *ss = 0; else finished = TRUE;
4982 /* Check max recipients - if -t was used, these aren't recipients */
4984 if (recipients_max > 0 && ++rcount > recipients_max &&
4985 !extract_recipients)
4987 if (error_handling == ERRORS_STDERR)
4989 fprintf(stderr, "exim: too many recipients\n");
4990 exim_exit(EXIT_FAILURE);
4995 moan_to_sender(ERRMESS_TOOMANYRECIP, NULL, NULL, stdin, TRUE)?
4996 errors_sender_rc : EXIT_FAILURE;
5001 parse_extract_address(s, &errmess, &start, &end, &domain, FALSE);
5003 if (domain == 0 && !allow_unqualified_recipient)
5006 errmess = US"unqualified recipient address not allowed";
5009 if (recipient == NULL)
5011 if (error_handling == ERRORS_STDERR)
5013 fprintf(stderr, "exim: bad recipient address \"%s\": %s\n",
5014 string_printing(list[i]), errmess);
5015 exim_exit(EXIT_FAILURE);
5021 eblock.text1 = string_printing(list[i]);
5022 eblock.text2 = errmess;
5024 moan_to_sender(ERRMESS_BADARGADDRESS, &eblock, NULL, stdin, TRUE)?
5025 errors_sender_rc : EXIT_FAILURE;
5029 receive_add_recipient(recipient, -1);
5032 while (*(++s) != 0 && (*s == ',' || isspace(*s)));
5036 /* Show the recipients when debugging */
5041 if (sender_address != NULL) debug_printf("Sender: %s\n", sender_address);
5042 if (recipients_list != NULL)
5044 debug_printf("Recipients:\n");
5045 for (i = 0; i < recipients_count; i++)
5046 debug_printf(" %s\n", recipients_list[i].address);
5050 /* Run the acl_not_smtp_start ACL if required. The result of the ACL is
5051 ignored; rejecting here would just add complication, and it can just as
5052 well be done later. Allow $recipients to be visible in the ACL. */
5054 if (acl_not_smtp_start != NULL)
5056 uschar *user_msg, *log_msg;
5057 enable_dollar_recipients = TRUE;
5058 (void)acl_check(ACL_WHERE_NOTSMTP_START, NULL, acl_not_smtp_start,
5059 &user_msg, &log_msg);
5060 enable_dollar_recipients = FALSE;
5063 /* Read the data for the message. If filter_test is not FTEST_NONE, this
5064 will just read the headers for the message, and not write anything onto the
5067 message_ended = END_NOTENDED;
5068 more = receive_msg(extract_recipients);
5070 /* more is always FALSE here (not SMTP message) when reading a message
5071 for real; when reading the headers of a message for filter testing,
5072 it is TRUE if the headers were terminated by '.' and FALSE otherwise. */
5074 if (message_id[0] == 0) exim_exit(EXIT_FAILURE);
5075 } /* Non-SMTP message reception */
5077 /* If this is a filter testing run, there are headers in store, but
5078 no message on the spool. Run the filtering code in testing mode, setting
5079 the domain to the qualify domain and the local part to the current user,
5080 unless they have been set by options. The prefix and suffix are left unset
5081 unless specified. The the return path is set to to the sender unless it has
5082 already been set from a return-path header in the message. */
5084 if (filter_test != FTEST_NONE)
5086 deliver_domain = (ftest_domain != NULL)?
5087 ftest_domain : qualify_domain_recipient;
5088 deliver_domain_orig = deliver_domain;
5089 deliver_localpart = (ftest_localpart != NULL)?
5090 ftest_localpart : originator_login;
5091 deliver_localpart_orig = deliver_localpart;
5092 deliver_localpart_prefix = ftest_prefix;
5093 deliver_localpart_suffix = ftest_suffix;
5094 deliver_home = originator_home;
5096 if (return_path == NULL)
5098 printf("Return-path copied from sender\n");
5099 return_path = string_copy(sender_address);
5103 printf("Return-path = %s\n", (return_path[0] == 0)? US"<>" : return_path);
5105 printf("Sender = %s\n", (sender_address[0] == 0)? US"<>" : sender_address);
5107 receive_add_recipient(
5108 string_sprintf("%s%s%s@%s",
5109 (ftest_prefix == NULL)? US"" : ftest_prefix,
5111 (ftest_suffix == NULL)? US"" : ftest_suffix,
5112 deliver_domain), -1);
5114 printf("Recipient = %s\n", recipients_list[0].address);
5115 if (ftest_prefix != NULL) printf("Prefix = %s\n", ftest_prefix);
5116 if (ftest_suffix != NULL) printf("Suffix = %s\n", ftest_suffix);
5118 (void)chdir("/"); /* Get away from wherever the user is running this from */
5120 /* Now we run either a system filter test, or a user filter test, or both.
5121 In the latter case, headers added by the system filter will persist and be
5122 available to the user filter. We need to copy the filter variables
5125 if ((filter_test & FTEST_SYSTEM) != 0)
5127 if (!filter_runtest(filter_sfd, filter_test_sfile, TRUE, more))
5128 exim_exit(EXIT_FAILURE);
5131 memcpy(filter_sn, filter_n, sizeof(filter_sn));
5133 if ((filter_test & FTEST_USER) != 0)
5135 if (!filter_runtest(filter_ufd, filter_test_ufile, FALSE, more))
5136 exim_exit(EXIT_FAILURE);
5139 exim_exit(EXIT_SUCCESS);
5142 /* Else act on the result of message reception. We should not get here unless
5143 message_id[0] is non-zero. If queue_only is set, session_local_queue_only
5144 will be TRUE. If it is not, check on the number of messages received in this
5147 if (!session_local_queue_only &&
5148 smtp_accept_queue_per_connection > 0 &&
5149 receive_messagecount > smtp_accept_queue_per_connection)
5151 session_local_queue_only = TRUE;
5152 queue_only_reason = 2;
5155 /* Initialize local_queue_only from session_local_queue_only. If it is false,
5156 and queue_only_load is set, check that the load average is below it. If it is
5157 not, set local_queue_only TRUE. If queue_only_load_latch is true (the
5158 default), we put the whole session into queue_only mode. It then remains this
5159 way for any subsequent messages on the same SMTP connection. This is a
5160 deliberate choice; even though the load average may fall, it doesn't seem
5161 right to deliver later messages on the same call when not delivering earlier
5162 ones. However, there are odd cases where this is not wanted, so this can be
5163 changed by setting queue_only_load_latch false. */
5165 local_queue_only = session_local_queue_only;
5166 if (!local_queue_only && queue_only_load >= 0)
5168 local_queue_only = (load_average = OS_GETLOADAVG()) > queue_only_load;
5169 if (local_queue_only)
5171 queue_only_reason = 3;
5172 if (queue_only_load_latch) session_local_queue_only = TRUE;
5176 /* If running as an MUA wrapper, all queueing options and freezing options
5180 local_queue_only = queue_only_policy = deliver_freeze = FALSE;
5182 /* Log the queueing here, when it will get a message id attached, but
5183 not if queue_only is set (case 0). Case 1 doesn't happen here (too many
5186 if (local_queue_only) switch(queue_only_reason)
5189 log_write(L_delay_delivery,
5190 LOG_MAIN, "no immediate delivery: more than %d messages "
5191 "received in one connection", smtp_accept_queue_per_connection);
5195 log_write(L_delay_delivery,
5196 LOG_MAIN, "no immediate delivery: load average %.2f",
5197 (double)load_average/1000.0);
5201 /* Else do the delivery unless the ACL or local_scan() called for queue only
5202 or froze the message. Always deliver in a separate process. A fork failure is
5203 not a disaster, as the delivery will eventually happen on a subsequent queue
5204 run. The search cache must be tidied before the fork, as the parent will
5205 do it before exiting. The child will trigger a lookup failure and
5206 thereby defer the delivery if it tries to use (for example) a cached ldap
5207 connection that the parent has called unbind on. */
5209 else if (!queue_only_policy && !deliver_freeze)
5214 if ((pid = fork()) == 0)
5217 close_unwanted(); /* Close unwanted file descriptors and TLS */
5218 exim_nullstd(); /* Ensure std{in,out,err} exist */
5220 /* Re-exec Exim if we need to regain privilege (note: in mua_wrapper
5221 mode, deliver_drop_privilege is forced TRUE). */
5223 if (geteuid() != root_uid && !deliver_drop_privilege && !unprivileged)
5225 (void)child_exec_exim(CEE_EXEC_EXIT, FALSE, NULL, FALSE, 2, US"-Mc",
5227 /* Control does not return here. */
5230 /* No need to re-exec */
5232 rc = deliver_message(message_id, FALSE, FALSE);
5234 _exit((!mua_wrapper || rc == DELIVER_MUA_SUCCEEDED)?
5235 EXIT_SUCCESS : EXIT_FAILURE);
5240 log_write(0, LOG_MAIN|LOG_PANIC, "failed to fork automatic delivery "
5241 "process: %s", strerror(errno));
5244 /* In the parent, wait if synchronous delivery is required. This will
5245 always be the case in MUA wrapper mode. */
5247 else if (synchronous_delivery)
5250 while (wait(&status) != pid);
5251 if ((status & 0x00ff) != 0)
5252 log_write(0, LOG_MAIN|LOG_PANIC,
5253 "process %d crashed with signal %d while delivering %s",
5254 (int)pid, status & 0x00ff, message_id);
5255 if (mua_wrapper && (status & 0xffff) != 0) exim_exit(EXIT_FAILURE);
5259 /* The loop will repeat if more is TRUE. If we do not know know that the OS
5260 automatically reaps children (see comments above the loop), clear away any
5261 finished subprocesses here, in case there are lots of messages coming in
5262 from the same source. */
5264 #ifndef SIG_IGN_WORKS
5265 while (waitpid(-1, NULL, WNOHANG) > 0);
5269 exim_exit(EXIT_SUCCESS); /* Never returns */
5270 return 0; /* To stop compiler warning */