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 * This should work: */
939 for (i = 0; i < lookup_list_count; i++)
941 if (lookup_list[i]->version_report)
942 lookup_list[i]->version_report(f);
945 #ifdef WHITELIST_D_MACROS
946 fprintf(f, "WHITELIST_D_MACROS: \"%s\"\n", WHITELIST_D_MACROS);
948 fprintf(f, "WHITELIST_D_MACROS unset\n");
950 #ifdef TRUSTED_CONFIG_LIST
951 fprintf(f, "TRUSTED_CONFIG_LIST: \"%s\"\n", TRUSTED_CONFIG_LIST);
953 fprintf(f, "TRUSTED_CONFIG_LIST unset\n");
962 /*************************************************
963 * Quote a local part *
964 *************************************************/
966 /* This function is used when a sender address or a From: or Sender: header
967 line is being created from the caller's login, or from an authenticated_id. It
968 applies appropriate quoting rules for a local part.
970 Argument: the local part
971 Returns: the local part, quoted if necessary
975 local_part_quote(uschar *lpart)
977 BOOL needs_quote = FALSE;
982 for (t = lpart; !needs_quote && *t != 0; t++)
984 needs_quote = !isalnum(*t) && strchr("!#$%&'*+-/=?^_`{|}~", *t) == NULL &&
985 (*t != '.' || t == lpart || t[1] == 0);
988 if (!needs_quote) return lpart;
991 yield = string_cat(NULL, &size, &ptr, US"\"", 1);
995 uschar *nq = US Ustrpbrk(lpart, "\\\"");
998 yield = string_cat(yield, &size, &ptr, lpart, Ustrlen(lpart));
1001 yield = string_cat(yield, &size, &ptr, lpart, nq - lpart);
1002 yield = string_cat(yield, &size, &ptr, US"\\", 1);
1003 yield = string_cat(yield, &size, &ptr, nq, 1);
1007 yield = string_cat(yield, &size, &ptr, US"\"", 1);
1015 /*************************************************
1016 * Load readline() functions *
1017 *************************************************/
1019 /* This function is called from testing executions that read data from stdin,
1020 but only when running as the calling user. Currently, only -be does this. The
1021 function loads the readline() function library and passes back the functions.
1022 On some systems, it needs the curses library, so load that too, but try without
1023 it if loading fails. All this functionality has to be requested at build time.
1026 fn_readline_ptr pointer to where to put the readline pointer
1027 fn_addhist_ptr pointer to where to put the addhistory function
1029 Returns: the dlopen handle or NULL on failure
1033 set_readline(char * (**fn_readline_ptr)(char *),
1034 char * (**fn_addhist_ptr)(char *))
1037 void *dlhandle_curses = dlopen("libcurses.so", RTLD_GLOBAL|RTLD_LAZY);
1039 dlhandle = dlopen("libreadline.so", RTLD_GLOBAL|RTLD_NOW);
1040 if (dlhandle_curses != NULL) dlclose(dlhandle_curses);
1042 if (dlhandle != NULL)
1044 *fn_readline_ptr = (char *(*)(char*))dlsym(dlhandle, "readline");
1045 *fn_addhist_ptr = (char *(*)(char*))dlsym(dlhandle, "add_history");
1049 DEBUG(D_any) debug_printf("failed to load readline: %s\n", dlerror());
1058 /*************************************************
1059 * Get a line from stdin for testing things *
1060 *************************************************/
1062 /* This function is called when running tests that can take a number of lines
1063 of input (for example, -be and -bt). It handles continuations and trailing
1064 spaces. And prompting and a blank line output on eof. If readline() is in use,
1065 the arguments are non-NULL and provide the relevant functions.
1068 fn_readline readline function or NULL
1069 fn_addhist addhist function or NULL
1071 Returns: pointer to dynamic memory, or NULL at end of file
1075 get_stdinput(char *(*fn_readline)(char *), char *(*fn_addhist)(char *))
1080 uschar *yield = NULL;
1082 if (fn_readline == NULL) { printf("> "); fflush(stdout); }
1086 uschar buffer[1024];
1090 char *readline_line = NULL;
1091 if (fn_readline != NULL)
1093 if ((readline_line = fn_readline((i > 0)? "":"> ")) == NULL) break;
1094 if (*readline_line != 0 && fn_addhist != NULL) fn_addhist(readline_line);
1095 p = US readline_line;
1100 /* readline() not in use */
1103 if (Ufgets(buffer, sizeof(buffer), stdin) == NULL) break;
1107 /* Handle the line */
1109 ss = p + (int)Ustrlen(p);
1110 while (ss > p && isspace(ss[-1])) ss--;
1114 while (p < ss && isspace(*p)) p++; /* leading space after cont */
1117 yield = string_cat(yield, &size, &ptr, p, ss - p);
1120 if (fn_readline != NULL) free(readline_line);
1123 if (ss == p || yield[ptr-1] != '\\')
1131 if (yield == NULL) printf("\n");
1137 /*************************************************
1138 * Output usage information for the program *
1139 *************************************************/
1141 /* This function is called when there are no recipients
1142 or a specific --help argument was added.
1145 progname information on what name we were called by
1147 Returns: DOES NOT RETURN
1151 exim_usage(uschar *progname)
1154 /* Handle specific program invocation varients */
1155 if (Ustrcmp(progname, US"-mailq") == 0)
1158 "mailq - list the contents of the mail queue\n\n"
1159 "For a list of options, see the Exim documentation.\n");
1163 /* Generic usage - we output this whatever happens */
1165 "Exim is a Mail Transfer Agent. It is normally called by Mail User Agents,\n"
1166 "not directly from a shell command line. Options and/or arguments control\n"
1167 "what it does when called. For a list of options, see the Exim documentation.\n");
1174 /*************************************************
1175 * Validate that the macros given are okay *
1176 *************************************************/
1178 /* Typically, Exim will drop privileges if macros are supplied. In some
1179 cases, we want to not do so.
1181 Arguments: none (macros is a global)
1182 Returns: true if trusted, false otherwise
1186 macros_trusted(void)
1188 #ifdef WHITELIST_D_MACROS
1190 uschar *whitelisted, *end, *p, **whites, **w;
1191 int white_count, i, n;
1193 BOOL prev_char_item, found;
1198 #ifndef WHITELIST_D_MACROS
1202 /* We only trust -D overrides for some invoking users:
1203 root, the exim run-time user, the optional config owner user.
1204 I don't know why config-owner would be needed, but since they can own the
1205 config files anyway, there's no security risk to letting them override -D. */
1206 if ( ! ((real_uid == root_uid)
1207 || (real_uid == exim_uid)
1208 #ifdef CONFIGURE_OWNER
1209 || (real_uid == config_uid)
1213 debug_printf("macros_trusted rejecting macros for uid %d\n", (int) real_uid);
1217 /* Get a list of macros which are whitelisted */
1218 whitelisted = string_copy_malloc(US WHITELIST_D_MACROS);
1219 prev_char_item = FALSE;
1221 for (p = whitelisted; *p != '\0'; ++p)
1223 if (*p == ':' || isspace(*p))
1228 prev_char_item = FALSE;
1231 if (!prev_char_item)
1232 prev_char_item = TRUE;
1239 whites = store_malloc(sizeof(uschar *) * (white_count+1));
1240 for (p = whitelisted, i = 0; (p != end) && (i < white_count); ++p)
1245 if (i == white_count)
1247 while (*p != '\0' && p < end)
1253 /* The list of macros should be very short. Accept the N*M complexity. */
1254 for (m = macros; m != NULL; m = m->next)
1257 for (w = whites; *w; ++w)
1258 if (Ustrcmp(*w, m->name) == 0)
1265 if (m->replacement == NULL)
1267 len = Ustrlen(m->replacement);
1270 n = pcre_exec(regex_whitelisted_macro, NULL, CS m->replacement, len,
1271 0, PCRE_EOPT, NULL, 0);
1274 if (n != PCRE_ERROR_NOMATCH)
1275 debug_printf("macros_trusted checking %s returned %d\n", m->name, n);
1279 debug_printf("macros_trusted overriden to true by whitelisting\n");
1285 /*************************************************
1286 * Entry point and high-level code *
1287 *************************************************/
1289 /* Entry point for the Exim mailer. Analyse the arguments and arrange to take
1290 the appropriate action. All the necessary functions are present in the one
1291 binary. I originally thought one should split it up, but it turns out that so
1292 much of the apparatus is needed in each chunk that one might as well just have
1293 it all available all the time, which then makes the coding easier as well.
1296 argc count of entries in argv
1297 argv argument strings, with argv[0] being the program name
1299 Returns: EXIT_SUCCESS if terminated successfully
1300 EXIT_FAILURE otherwise, except when a message has been sent
1301 to the sender, and -oee was given
1305 main(int argc, char **cargv)
1307 uschar **argv = USS cargv;
1308 int arg_receive_timeout = -1;
1309 int arg_smtp_receive_timeout = -1;
1310 int arg_error_handling = error_handling;
1311 int filter_sfd = -1;
1312 int filter_ufd = -1;
1315 int list_queue_option = 0;
1317 int msg_action_arg = -1;
1318 int namelen = (argv[0] == NULL)? 0 : Ustrlen(argv[0]);
1319 int queue_only_reason = 0;
1321 int perl_start_option = 0;
1323 int recipients_arg = argc;
1324 int sender_address_domain = 0;
1325 int test_retry_arg = -1;
1326 int test_rewrite_arg = -1;
1327 BOOL arg_queue_only = FALSE;
1328 BOOL bi_option = FALSE;
1329 BOOL checking = FALSE;
1330 BOOL count_queue = FALSE;
1331 BOOL expansion_test = FALSE;
1332 BOOL extract_recipients = FALSE;
1333 BOOL forced_delivery = FALSE;
1334 BOOL f_end_dot = FALSE;
1335 BOOL deliver_give_up = FALSE;
1336 BOOL list_queue = FALSE;
1337 BOOL list_options = FALSE;
1338 BOOL local_queue_only;
1340 BOOL one_msg_action = FALSE;
1341 BOOL queue_only_set = FALSE;
1342 BOOL receiving_message = TRUE;
1343 BOOL sender_ident_set = FALSE;
1344 BOOL session_local_queue_only;
1346 BOOL removed_privilege = FALSE;
1347 BOOL usage_wanted = FALSE;
1348 BOOL verify_address_mode = FALSE;
1349 BOOL verify_as_sender = FALSE;
1350 BOOL version_printed = FALSE;
1351 uschar *alias_arg = NULL;
1352 uschar *called_as = US"";
1353 uschar *start_queue_run_id = NULL;
1354 uschar *stop_queue_run_id = NULL;
1355 uschar *expansion_test_message = NULL;
1356 uschar *ftest_domain = NULL;
1357 uschar *ftest_localpart = NULL;
1358 uschar *ftest_prefix = NULL;
1359 uschar *ftest_suffix = NULL;
1360 uschar *malware_test_file = NULL;
1361 uschar *real_sender_address;
1362 uschar *originator_home = US"/";
1366 struct stat statbuf;
1367 pid_t passed_qr_pid = (pid_t)0;
1368 int passed_qr_pipe = -1;
1369 gid_t group_list[NGROUPS_MAX];
1371 /* Possible options for -R and -S */
1373 static uschar *rsopts[] = { US"f", US"ff", US"r", US"rf", US"rff" };
1375 /* Need to define this in case we need to change the environment in order
1376 to get rid of a bogus time zone. We have to make it char rather than uschar
1377 because some OS define it in /usr/include/unistd.h. */
1379 extern char **environ;
1381 /* If the Exim user and/or group and/or the configuration file owner/group were
1382 defined by ref:name at build time, we must now find the actual uid/gid values.
1383 This is a feature to make the lives of binary distributors easier. */
1385 #ifdef EXIM_USERNAME
1386 if (route_finduser(US EXIM_USERNAME, &pw, &exim_uid))
1390 fprintf(stderr, "exim: refusing to run with uid 0 for \"%s\"\n",
1394 exim_gid = pw->pw_gid;
1398 fprintf(stderr, "exim: failed to find uid for user name \"%s\"\n",
1404 #ifdef EXIM_GROUPNAME
1405 if (!route_findgroup(US EXIM_GROUPNAME, &exim_gid))
1407 fprintf(stderr, "exim: failed to find gid for group name \"%s\"\n",
1413 #ifdef CONFIGURE_OWNERNAME
1414 if (!route_finduser(US CONFIGURE_OWNERNAME, NULL, &config_uid))
1416 fprintf(stderr, "exim: failed to find uid for user name \"%s\"\n",
1417 CONFIGURE_OWNERNAME);
1422 /* We default the system_filter_user to be the Exim run-time user, as a
1423 sane non-root value. */
1424 system_filter_uid = exim_uid;
1426 #ifdef CONFIGURE_GROUPNAME
1427 if (!route_findgroup(US CONFIGURE_GROUPNAME, &config_gid))
1429 fprintf(stderr, "exim: failed to find gid for group name \"%s\"\n",
1430 CONFIGURE_GROUPNAME);
1435 /* In the Cygwin environment, some initialization needs doing. It is fudged
1436 in by means of this macro. */
1442 /* Check a field which is patched when we are running Exim within its
1443 testing harness; do a fast initial check, and then the whole thing. */
1445 running_in_test_harness =
1446 *running_status == '<' && Ustrcmp(running_status, "<<<testing>>>") == 0;
1448 /* The C standard says that the equivalent of setlocale(LC_ALL, "C") is obeyed
1449 at the start of a program; however, it seems that some environments do not
1450 follow this. A "strange" locale can affect the formatting of timestamps, so we
1453 setlocale(LC_ALL, "C");
1455 /* Set up the default handler for timing using alarm(). */
1457 os_non_restarting_signal(SIGALRM, sigalrm_handler);
1459 /* Ensure we have a buffer for constructing log entries. Use malloc directly,
1460 because store_malloc writes a log entry on failure. */
1462 log_buffer = (uschar *)malloc(LOG_BUFFER_SIZE);
1463 if (log_buffer == NULL)
1465 fprintf(stderr, "exim: failed to get store for log buffer\n");
1469 /* Set log_stderr to stderr, provided that stderr exists. This gets reset to
1470 NULL when the daemon is run and the file is closed. We have to use this
1471 indirection, because some systems don't allow writing to the variable "stderr".
1474 if (fstat(fileno(stderr), &statbuf) >= 0) log_stderr = stderr;
1476 /* Arrange for the PCRE regex library to use our store functions. Note that
1477 the normal calls are actually macros that add additional arguments for
1478 debugging purposes so we have to assign specially constructed functions here.
1479 The default is to use store in the stacking pool, but this is overridden in the
1480 regex_must_compile() function. */
1482 pcre_malloc = function_store_get;
1483 pcre_free = function_dummy_free;
1485 /* Ensure there is a big buffer for temporary use in several places. It is put
1486 in malloc store so that it can be freed for enlargement if necessary. */
1488 big_buffer = store_malloc(big_buffer_size);
1490 /* Set up the handler for the data request signal, and set the initial
1491 descriptive text. */
1493 set_process_info("initializing");
1494 os_restarting_signal(SIGUSR1, usr1_handler);
1496 /* SIGHUP is used to get the daemon to reconfigure. It gets set as appropriate
1497 in the daemon code. For the rest of Exim's uses, we ignore it. */
1499 signal(SIGHUP, SIG_IGN);
1501 /* We don't want to die on pipe errors as the code is written to handle
1502 the write error instead. */
1504 signal(SIGPIPE, SIG_IGN);
1506 /* Under some circumstance on some OS, Exim can get called with SIGCHLD
1507 set to SIG_IGN. This causes subprocesses that complete before the parent
1508 process waits for them not to hang around, so when Exim calls wait(), nothing
1509 is there. The wait() code has been made robust against this, but let's ensure
1510 that SIGCHLD is set to SIG_DFL, because it's tidier to wait and get a process
1511 ending status. We use sigaction rather than plain signal() on those OS where
1512 SA_NOCLDWAIT exists, because we want to be sure it is turned off. (There was a
1513 problem on AIX with this.) */
1517 struct sigaction act;
1518 act.sa_handler = SIG_DFL;
1519 sigemptyset(&(act.sa_mask));
1521 sigaction(SIGCHLD, &act, NULL);
1524 signal(SIGCHLD, SIG_DFL);
1527 /* Save the arguments for use if we re-exec exim as a daemon after receiving
1532 /* Set up the version number. Set up the leading 'E' for the external form of
1533 message ids, set the pointer to the internal form, and initialize it to
1534 indicate no message being processed. */
1537 message_id_option[0] = '-';
1538 message_id_external = message_id_option + 1;
1539 message_id_external[0] = 'E';
1540 message_id = message_id_external + 1;
1543 /* Set the umask to zero so that any files Exim creates using open() are
1544 created with the modes that it specifies. NOTE: Files created with fopen() have
1545 a problem, which was not recognized till rather late (February 2006). With this
1546 umask, such files will be world writeable. (They are all content scanning files
1547 in the spool directory, which isn't world-accessible, so this is not a
1548 disaster, but it's untidy.) I don't want to change this overall setting,
1549 however, because it will interact badly with the open() calls. Instead, there's
1550 now a function called modefopen() that fiddles with the umask while calling
1555 /* Precompile the regular expression for matching a message id. Keep this in
1556 step with the code that generates ids in the accept.c module. We need to do
1557 this here, because the -M options check their arguments for syntactic validity
1558 using mac_ismsgid, which uses this. */
1561 regex_must_compile(US"^(?:[^\\W_]{6}-){2}[^\\W_]{2}$", FALSE, TRUE);
1563 /* Precompile the regular expression that is used for matching an SMTP error
1564 code, possibly extended, at the start of an error message. Note that the
1565 terminating whitespace character is included. */
1568 regex_must_compile(US"^\\d\\d\\d\\s(?:\\d\\.\\d\\d?\\d?\\.\\d\\d?\\d?\\s)?",
1571 #ifdef WHITELIST_D_MACROS
1572 /* Precompile the regular expression used to filter the content of macros
1573 given to -D for permissibility. */
1575 regex_whitelisted_macro =
1576 regex_must_compile(US"^[A-Za-z0-9_/.-]*$", FALSE, TRUE);
1580 /* If the program is called as "mailq" treat it as equivalent to "exim -bp";
1581 this seems to be a generally accepted convention, since one finds symbolic
1582 links called "mailq" in standard OS configurations. */
1584 if ((namelen == 5 && Ustrcmp(argv[0], "mailq") == 0) ||
1585 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/mailq", 6) == 0))
1588 receiving_message = FALSE;
1589 called_as = US"-mailq";
1592 /* If the program is called as "rmail" treat it as equivalent to
1593 "exim -i -oee", thus allowing UUCP messages to be input using non-SMTP mode,
1594 i.e. preventing a single dot on a line from terminating the message, and
1595 returning with zero return code, even in cases of error (provided an error
1596 message has been sent). */
1598 if ((namelen == 5 && Ustrcmp(argv[0], "rmail") == 0) ||
1599 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/rmail", 6) == 0))
1602 called_as = US"-rmail";
1603 errors_sender_rc = EXIT_SUCCESS;
1606 /* If the program is called as "rsmtp" treat it as equivalent to "exim -bS";
1607 this is a smail convention. */
1609 if ((namelen == 5 && Ustrcmp(argv[0], "rsmtp") == 0) ||
1610 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/rsmtp", 6) == 0))
1612 smtp_input = smtp_batched_input = TRUE;
1613 called_as = US"-rsmtp";
1616 /* If the program is called as "runq" treat it as equivalent to "exim -q";
1617 this is a smail convention. */
1619 if ((namelen == 4 && Ustrcmp(argv[0], "runq") == 0) ||
1620 (namelen > 4 && Ustrncmp(argv[0] + namelen - 5, "/runq", 5) == 0))
1623 receiving_message = FALSE;
1624 called_as = US"-runq";
1627 /* If the program is called as "newaliases" treat it as equivalent to
1628 "exim -bi"; this is a sendmail convention. */
1630 if ((namelen == 10 && Ustrcmp(argv[0], "newaliases") == 0) ||
1631 (namelen > 10 && Ustrncmp(argv[0] + namelen - 11, "/newaliases", 11) == 0))
1634 receiving_message = FALSE;
1635 called_as = US"-newaliases";
1638 /* Save the original effective uid for a couple of uses later. It should
1639 normally be root, but in some esoteric environments it may not be. */
1641 original_euid = geteuid();
1643 /* Get the real uid and gid. If the caller is root, force the effective uid/gid
1644 to be the same as the real ones. This makes a difference only if Exim is setuid
1645 (or setgid) to something other than root, which could be the case in some
1646 special configurations. */
1648 real_uid = getuid();
1649 real_gid = getgid();
1651 if (real_uid == root_uid)
1653 rv = setgid(real_gid);
1656 fprintf(stderr, "exim: setgid(%ld) failed: %s\n",
1657 (long int)real_gid, strerror(errno));
1660 rv = setuid(real_uid);
1663 fprintf(stderr, "exim: setuid(%ld) failed: %s\n",
1664 (long int)real_uid, strerror(errno));
1669 /* If neither the original real uid nor the original euid was root, Exim is
1670 running in an unprivileged state. */
1672 unprivileged = (real_uid != root_uid && original_euid != root_uid);
1674 /* Scan the program's arguments. Some can be dealt with right away; others are
1675 simply recorded for checking and handling afterwards. Do a high-level switch
1676 on the second character (the one after '-'), to save some effort. */
1678 for (i = 1; i < argc; i++)
1680 BOOL badarg = FALSE;
1681 uschar *arg = argv[i];
1685 /* An argument not starting with '-' is the start of a recipients list;
1686 break out of the options-scanning loop. */
1694 /* An option consistion of -- terminates the options */
1696 if (Ustrcmp(arg, "--") == 0)
1698 recipients_arg = i + 1;
1702 /* Handle flagged options */
1704 switchchar = arg[1];
1707 /* Make all -ex options synonymous with -oex arguments, since that
1708 is assumed by various callers. Also make -qR options synonymous with -R
1709 options, as that seems to be required as well. Allow for -qqR too, and
1710 the same for -S options. */
1712 if (Ustrncmp(arg+1, "oe", 2) == 0 ||
1713 Ustrncmp(arg+1, "qR", 2) == 0 ||
1714 Ustrncmp(arg+1, "qS", 2) == 0)
1716 switchchar = arg[2];
1719 else if (Ustrncmp(arg+1, "qqR", 3) == 0 || Ustrncmp(arg+1, "qqS", 3) == 0)
1721 switchchar = arg[3];
1723 queue_2stage = TRUE;
1726 /* Make -r synonymous with -f, since it is a documented alias */
1728 else if (arg[1] == 'r') switchchar = 'f';
1730 /* Make -ov synonymous with -v */
1732 else if (Ustrcmp(arg, "-ov") == 0)
1738 /* deal with --option_aliases */
1739 else if (switchchar == '-')
1741 if (Ustrcmp(argrest, "help") == 0)
1743 usage_wanted = TRUE;
1746 else if (Ustrcmp(argrest, "version") == 0)
1753 /* High-level switch on active initial letter */
1757 /* -Btype is a sendmail option for 7bit/8bit setting. Exim is 8-bit clean
1758 so has no need of it. */
1761 if (*argrest == 0) i++; /* Skip over the type */
1766 receiving_message = FALSE; /* Reset TRUE for -bm, -bS, -bs below */
1768 /* -bd: Run in daemon mode, awaiting SMTP connections.
1769 -bdf: Ditto, but in the foreground.
1772 if (*argrest == 'd')
1774 daemon_listen = TRUE;
1775 if (*(++argrest) == 'f') background_daemon = FALSE;
1776 else if (*argrest != 0) { badarg = TRUE; break; }
1779 /* -be: Run in expansion test mode
1780 -bem: Ditto, but read a message from a file first
1783 else if (*argrest == 'e')
1785 expansion_test = checking = TRUE;
1786 if (argrest[1] == 'm')
1788 if (++i >= argc) { badarg = TRUE; break; }
1789 expansion_test_message = argv[i];
1792 if (argrest[1] != 0) { badarg = TRUE; break; }
1795 /* -bF: Run system filter test */
1797 else if (*argrest == 'F')
1799 filter_test |= FTEST_SYSTEM;
1800 if (*(++argrest) != 0) { badarg = TRUE; break; }
1801 if (++i < argc) filter_test_sfile = argv[i]; else
1803 fprintf(stderr, "exim: file name expected after %s\n", argv[i-1]);
1808 /* -bf: Run user filter test
1809 -bfd: Set domain for filter testing
1810 -bfl: Set local part for filter testing
1811 -bfp: Set prefix for filter testing
1812 -bfs: Set suffix for filter testing
1815 else if (*argrest == 'f')
1817 if (*(++argrest) == 0)
1819 filter_test |= FTEST_USER;
1820 if (++i < argc) filter_test_ufile = argv[i]; else
1822 fprintf(stderr, "exim: file name expected after %s\n", argv[i-1]);
1830 fprintf(stderr, "exim: string expected after %s\n", arg);
1833 if (Ustrcmp(argrest, "d") == 0) ftest_domain = argv[i];
1834 else if (Ustrcmp(argrest, "l") == 0) ftest_localpart = argv[i];
1835 else if (Ustrcmp(argrest, "p") == 0) ftest_prefix = argv[i];
1836 else if (Ustrcmp(argrest, "s") == 0) ftest_suffix = argv[i];
1837 else { badarg = TRUE; break; }
1841 /* -bh: Host checking - an IP address must follow. */
1843 else if (Ustrcmp(argrest, "h") == 0 || Ustrcmp(argrest, "hc") == 0)
1845 if (++i >= argc) { badarg = TRUE; break; }
1846 sender_host_address = argv[i];
1847 host_checking = checking = log_testing_mode = TRUE;
1848 host_checking_callout = argrest[1] == 'c';
1851 /* -bi: This option is used by sendmail to initialize *the* alias file,
1852 though it has the -oA option to specify a different file. Exim has no
1853 concept of *the* alias file, but since Sun's YP make script calls
1854 sendmail this way, some support must be provided. */
1856 else if (Ustrcmp(argrest, "i") == 0) bi_option = TRUE;
1858 /* -bm: Accept and deliver message - the default option. Reinstate
1859 receiving_message, which got turned off for all -b options. */
1861 else if (Ustrcmp(argrest, "m") == 0) receiving_message = TRUE;
1863 /* -bmalware: test the filename given for malware */
1865 else if (Ustrcmp(argrest, "malware") == 0)
1867 if (++i >= argc) { badarg = TRUE; break; }
1868 malware_test_file = argv[i];
1871 /* -bnq: For locally originating messages, do not qualify unqualified
1872 addresses. In the envelope, this causes errors; in header lines they
1875 else if (Ustrcmp(argrest, "nq") == 0)
1877 allow_unqualified_sender = FALSE;
1878 allow_unqualified_recipient = FALSE;
1881 /* -bpxx: List the contents of the mail queue, in various forms. If
1882 the option is -bpc, just a queue count is needed. Otherwise, if the
1883 first letter after p is r, then order is random. */
1885 else if (*argrest == 'p')
1887 if (*(++argrest) == 'c')
1890 if (*(++argrest) != 0) badarg = TRUE;
1894 if (*argrest == 'r')
1896 list_queue_option = 8;
1899 else list_queue_option = 0;
1903 /* -bp: List the contents of the mail queue, top-level only */
1905 if (*argrest == 0) {}
1907 /* -bpu: List the contents of the mail queue, top-level undelivered */
1909 else if (Ustrcmp(argrest, "u") == 0) list_queue_option += 1;
1911 /* -bpa: List the contents of the mail queue, including all delivered */
1913 else if (Ustrcmp(argrest, "a") == 0) list_queue_option += 2;
1915 /* Unknown after -bp[r] */
1925 /* -bP: List the configuration variables given as the address list.
1926 Force -v, so configuration errors get displayed. */
1928 else if (Ustrcmp(argrest, "P") == 0)
1930 list_options = TRUE;
1931 debug_selector |= D_v;
1932 debug_file = stderr;
1935 /* -brt: Test retry configuration lookup */
1937 else if (Ustrcmp(argrest, "rt") == 0)
1939 test_retry_arg = i + 1;
1943 /* -brw: Test rewrite configuration */
1945 else if (Ustrcmp(argrest, "rw") == 0)
1947 test_rewrite_arg = i + 1;
1951 /* -bS: Read SMTP commands on standard input, but produce no replies -
1952 all errors are reported by sending messages. */
1954 else if (Ustrcmp(argrest, "S") == 0)
1955 smtp_input = smtp_batched_input = receiving_message = TRUE;
1957 /* -bs: Read SMTP commands on standard input and produce SMTP replies
1958 on standard output. */
1960 else if (Ustrcmp(argrest, "s") == 0) smtp_input = receiving_message = TRUE;
1962 /* -bt: address testing mode */
1964 else if (Ustrcmp(argrest, "t") == 0)
1965 address_test_mode = checking = log_testing_mode = TRUE;
1967 /* -bv: verify addresses */
1969 else if (Ustrcmp(argrest, "v") == 0)
1970 verify_address_mode = checking = log_testing_mode = TRUE;
1972 /* -bvs: verify sender addresses */
1974 else if (Ustrcmp(argrest, "vs") == 0)
1976 verify_address_mode = checking = log_testing_mode = TRUE;
1977 verify_as_sender = TRUE;
1980 /* -bV: Print version string and support details */
1982 else if (Ustrcmp(argrest, "V") == 0)
1984 printf("Exim version %s #%s built %s\n", version_string,
1985 version_cnumber, version_date);
1986 printf("%s\n", CS version_copyright);
1987 version_printed = TRUE;
1988 show_whats_supported(stdout);
1995 /* -C: change configuration file list; ignore if it isn't really
1996 a change! Enforce a prefix check if required. */
2001 if(++i < argc) argrest = argv[i]; else
2002 { badarg = TRUE; break; }
2004 if (Ustrcmp(config_main_filelist, argrest) != 0)
2006 #ifdef ALT_CONFIG_PREFIX
2008 int len = Ustrlen(ALT_CONFIG_PREFIX);
2009 uschar *list = argrest;
2011 while((filename = string_nextinlist(&list, &sep, big_buffer,
2012 big_buffer_size)) != NULL)
2014 if ((Ustrlen(filename) < len ||
2015 Ustrncmp(filename, ALT_CONFIG_PREFIX, len) != 0 ||
2016 Ustrstr(filename, "/../") != NULL) &&
2017 (Ustrcmp(filename, "/dev/null") != 0 || real_uid != root_uid))
2019 fprintf(stderr, "-C Permission denied\n");
2024 if (real_uid != root_uid)
2026 #ifdef TRUSTED_CONFIG_LIST
2028 if (real_uid != exim_uid
2029 #ifdef CONFIGURE_OWNER
2030 && real_uid != config_uid
2033 trusted_config = FALSE;
2036 FILE *trust_list = Ufopen(TRUSTED_CONFIG_LIST, "rb");
2039 struct stat statbuf;
2041 if (fstat(fileno(trust_list), &statbuf) != 0 ||
2042 (statbuf.st_uid != root_uid /* owner not root */
2043 #ifdef CONFIGURE_OWNER
2044 && statbuf.st_uid != config_uid /* owner not the special one */
2047 (statbuf.st_gid != root_gid /* group not root */
2048 #ifdef CONFIGURE_GROUP
2049 && statbuf.st_gid != config_gid /* group not the special one */
2051 && (statbuf.st_mode & 020) != 0 /* group writeable */
2053 (statbuf.st_mode & 2) != 0) /* world writeable */
2055 trusted_config = FALSE;
2060 /* Well, the trust list at least is up to scratch... */
2061 void *reset_point = store_get(0);
2062 uschar *trusted_configs[32];
2066 while (Ufgets(big_buffer, big_buffer_size, trust_list))
2068 uschar *start = big_buffer, *nl;
2069 while (*start && isspace(*start))
2073 nl = Ustrchr(start, '\n');
2076 trusted_configs[nr_configs++] = string_copy(start);
2077 if (nr_configs == 32)
2085 uschar *list = argrest;
2087 while (trusted_config && (filename = string_nextinlist(&list,
2088 &sep, big_buffer, big_buffer_size)) != NULL)
2090 for (i=0; i < nr_configs; i++)
2092 if (Ustrcmp(filename, trusted_configs[i]) == 0)
2095 if (i == nr_configs)
2097 trusted_config = FALSE;
2101 store_reset(reset_point);
2105 /* No valid prefixes found in trust_list file. */
2106 trusted_config = FALSE;
2112 /* Could not open trust_list file. */
2113 trusted_config = FALSE;
2117 /* Not root; don't trust config */
2118 trusted_config = FALSE;
2122 config_main_filelist = argrest;
2123 config_changed = TRUE;
2128 /* -D: set up a macro definition */
2131 #ifdef DISABLE_D_OPTION
2132 fprintf(stderr, "exim: -D is not available in this Exim binary\n");
2137 macro_item *mlast = NULL;
2140 uschar *s = argrest;
2142 while (isspace(*s)) s++;
2144 if (*s < 'A' || *s > 'Z')
2146 fprintf(stderr, "exim: macro name set by -D must start with "
2147 "an upper case letter\n");
2151 while (isalnum(*s) || *s == '_')
2153 if (ptr < sizeof(name)-1) name[ptr++] = *s;
2157 if (ptr == 0) { badarg = TRUE; break; }
2158 while (isspace(*s)) s++;
2161 if (*s++ != '=') { badarg = TRUE; break; }
2162 while (isspace(*s)) s++;
2165 for (m = macros; m != NULL; m = m->next)
2167 if (Ustrcmp(m->name, name) == 0)
2169 fprintf(stderr, "exim: duplicated -D in command line\n");
2175 m = store_get(sizeof(macro_item) + Ustrlen(name));
2177 m->command_line = TRUE;
2178 if (mlast == NULL) macros = m; else mlast->next = m;
2179 Ustrcpy(m->name, name);
2180 m->replacement = string_copy(s);
2182 if (clmacro_count >= MAX_CLMACROS)
2184 fprintf(stderr, "exim: too many -D options on command line\n");
2187 clmacros[clmacro_count++] = string_sprintf("-D%s=%s", m->name,
2193 /* -d: Set debug level (see also -v below) or set the drop_cr option.
2194 The latter is now a no-op, retained for compatibility only. If -dd is used,
2195 debugging subprocesses of the daemon is disabled. */
2198 if (Ustrcmp(argrest, "ropcr") == 0)
2200 /* drop_cr = TRUE; */
2203 /* Use an intermediate variable so that we don't set debugging while
2204 decoding the debugging bits. */
2208 unsigned int selector = D_default;
2211 if (*argrest == 'd')
2213 debug_daemon = TRUE;
2217 decode_bits(&selector, NULL, D_memory, 0, argrest, debug_options,
2218 debug_options_count, US"debug", 0);
2219 debug_selector = selector;
2224 /* -E: This is a local error message. This option is not intended for
2225 external use at all, but is not restricted to trusted callers because it
2226 does no harm (just suppresses certain error messages) and if Exim is run
2227 not setuid root it won't always be trusted when it generates error
2228 messages using this option. If there is a message id following -E, point
2229 message_reference at it, for logging. */
2232 local_error_message = TRUE;
2233 if (mac_ismsgid(argrest)) message_reference = argrest;
2237 /* -ex: The vacation program calls sendmail with the undocumented "-eq"
2238 option, so it looks as if historically the -oex options are also callable
2239 without the leading -o. So we have to accept them. Before the switch,
2240 anything starting -oe has been converted to -e. Exim does not support all
2241 of the sendmail error options. */
2244 if (Ustrcmp(argrest, "e") == 0)
2246 arg_error_handling = ERRORS_SENDER;
2247 errors_sender_rc = EXIT_SUCCESS;
2249 else if (Ustrcmp(argrest, "m") == 0) arg_error_handling = ERRORS_SENDER;
2250 else if (Ustrcmp(argrest, "p") == 0) arg_error_handling = ERRORS_STDERR;
2251 else if (Ustrcmp(argrest, "q") == 0) arg_error_handling = ERRORS_STDERR;
2252 else if (Ustrcmp(argrest, "w") == 0) arg_error_handling = ERRORS_SENDER;
2257 /* -F: Set sender's full name, used instead of the gecos entry from
2258 the password file. Since users can usually alter their gecos entries,
2259 there's no security involved in using this instead. The data can follow
2260 the -F or be in the next argument. */
2265 if(++i < argc) argrest = argv[i]; else
2266 { badarg = TRUE; break; }
2268 originator_name = argrest;
2269 sender_name_forced = TRUE;
2273 /* -f: Set sender's address - this value is only actually used if Exim is
2274 run by a trusted user, or if untrusted_set_sender is set and matches the
2275 address, except that the null address can always be set by any user. The
2276 test for this happens later, when the value given here is ignored when not
2277 permitted. For an untrusted user, the actual sender is still put in Sender:
2278 if it doesn't match the From: header (unless no_local_from_check is set).
2279 The data can follow the -f or be in the next argument. The -r switch is an
2280 obsolete form of -f but since there appear to be programs out there that
2281 use anything that sendmail has ever supported, better accept it - the
2282 synonymizing is done before the switch above.
2284 At this stage, we must allow domain literal addresses, because we don't
2285 know what the setting of allow_domain_literals is yet. Ditto for trailing
2286 dots and strip_trailing_dot. */
2294 if (i+1 < argc) argrest = argv[++i]; else
2295 { badarg = TRUE; break; }
2299 sender_address = string_sprintf(""); /* Ensure writeable memory */
2303 uschar *temp = argrest + Ustrlen(argrest) - 1;
2304 while (temp >= argrest && isspace(*temp)) temp--;
2305 if (temp >= argrest && *temp == '.') f_end_dot = TRUE;
2306 allow_domain_literals = TRUE;
2307 strip_trailing_dot = TRUE;
2308 sender_address = parse_extract_address(argrest, &errmess, &start, &end,
2309 &sender_address_domain, TRUE);
2310 allow_domain_literals = FALSE;
2311 strip_trailing_dot = FALSE;
2312 if (sender_address == NULL)
2314 fprintf(stderr, "exim: bad -f address \"%s\": %s\n", argrest, errmess);
2315 return EXIT_FAILURE;
2318 sender_address_forced = TRUE;
2322 /* This is some Sendmail thing which can be ignored */
2327 /* -h: Set the hop count for an incoming message. Exim does not currently
2328 support this; it always computes it by counting the Received: headers.
2329 To put it in will require a change to the spool header file format. */
2334 if(++i < argc) argrest = argv[i]; else
2335 { badarg = TRUE; break; }
2337 if (!isdigit(*argrest)) badarg = TRUE;
2341 /* -i: Set flag so dot doesn't end non-SMTP input (same as -oi, seems
2342 not to be documented for sendmail but mailx (at least) uses it) */
2345 if (*argrest == 0) dot_ends = FALSE; else badarg = TRUE;
2350 receiving_message = FALSE;
2352 /* -MC: continue delivery of another message via an existing open
2353 file descriptor. This option is used for an internal call by the
2354 smtp transport when there is a pending message waiting to go to an
2355 address to which it has got a connection. Five subsequent arguments are
2356 required: transport name, host name, IP address, sequence number, and
2357 message_id. Transports may decline to create new processes if the sequence
2358 number gets too big. The channel is stdin. This (-MC) must be the last
2359 argument. There's a subsequent check that the real-uid is privileged.
2361 If we are running in the test harness. delay for a bit, to let the process
2362 that set this one up complete. This makes for repeatability of the logging,
2365 if (Ustrcmp(argrest, "C") == 0)
2367 union sockaddr_46 interface_sock;
2368 EXIM_SOCKLEN_T size = sizeof(interface_sock);
2372 fprintf(stderr, "exim: too many or too few arguments after -MC\n");
2373 return EXIT_FAILURE;
2376 if (msg_action_arg >= 0)
2378 fprintf(stderr, "exim: incompatible arguments\n");
2379 return EXIT_FAILURE;
2382 continue_transport = argv[++i];
2383 continue_hostname = argv[++i];
2384 continue_host_address = argv[++i];
2385 continue_sequence = Uatoi(argv[++i]);
2386 msg_action = MSG_DELIVER;
2387 msg_action_arg = ++i;
2388 forced_delivery = TRUE;
2389 queue_run_pid = passed_qr_pid;
2390 queue_run_pipe = passed_qr_pipe;
2392 if (!mac_ismsgid(argv[i]))
2394 fprintf(stderr, "exim: malformed message id %s after -MC option\n",
2396 return EXIT_FAILURE;
2399 /* Set up $sending_ip_address and $sending_port */
2401 if (getsockname(fileno(stdin), (struct sockaddr *)(&interface_sock),
2403 sending_ip_address = host_ntoa(-1, &interface_sock, NULL,
2407 fprintf(stderr, "exim: getsockname() failed after -MC option: %s\n",
2409 return EXIT_FAILURE;
2412 if (running_in_test_harness) millisleep(500);
2416 /* -MCA: set the smtp_authenticated flag; this is useful only when it
2417 precedes -MC (see above). The flag indicates that the host to which
2418 Exim is connected has accepted an AUTH sequence. */
2420 else if (Ustrcmp(argrest, "CA") == 0)
2422 smtp_authenticated = TRUE;
2426 /* -MCP: set the smtp_use_pipelining flag; this is useful only when
2427 it preceded -MC (see above) */
2429 else if (Ustrcmp(argrest, "CP") == 0)
2431 smtp_use_pipelining = TRUE;
2435 /* -MCQ: pass on the pid of the queue-running process that started
2436 this chain of deliveries and the fd of its synchronizing pipe; this
2437 is useful only when it precedes -MC (see above) */
2439 else if (Ustrcmp(argrest, "CQ") == 0)
2441 if(++i < argc) passed_qr_pid = (pid_t)(Uatol(argv[i]));
2443 if(++i < argc) passed_qr_pipe = (int)(Uatol(argv[i]));
2448 /* -MCS: set the smtp_use_size flag; this is useful only when it
2449 precedes -MC (see above) */
2451 else if (Ustrcmp(argrest, "CS") == 0)
2453 smtp_use_size = TRUE;
2457 /* -MCT: set the tls_offered flag; this is useful only when it
2458 precedes -MC (see above). The flag indicates that the host to which
2459 Exim is connected has offered TLS support. */
2462 else if (Ustrcmp(argrest, "CT") == 0)
2469 /* -M[x]: various operations on the following list of message ids:
2470 -M deliver the messages, ignoring next retry times and thawing
2471 -Mc deliver the messages, checking next retry times, no thawing
2472 -Mf freeze the messages
2473 -Mg give up on the messages
2474 -Mt thaw the messages
2475 -Mrm remove the messages
2476 In the above cases, this must be the last option. There are also the
2477 following options which are followed by a single message id, and which
2478 act on that message. Some of them use the "recipient" addresses as well.
2479 -Mar add recipient(s)
2480 -Mmad mark all recipients delivered
2481 -Mmd mark recipients(s) delivered
2483 -Mset load a message for use with -be
2485 -Mvc show copy (of whole message, in RFC 2822 format)
2490 else if (*argrest == 0)
2492 msg_action = MSG_DELIVER;
2493 forced_delivery = deliver_force_thaw = TRUE;
2495 else if (Ustrcmp(argrest, "ar") == 0)
2497 msg_action = MSG_ADD_RECIPIENT;
2498 one_msg_action = TRUE;
2500 else if (Ustrcmp(argrest, "c") == 0) msg_action = MSG_DELIVER;
2501 else if (Ustrcmp(argrest, "es") == 0)
2503 msg_action = MSG_EDIT_SENDER;
2504 one_msg_action = TRUE;
2506 else if (Ustrcmp(argrest, "f") == 0) msg_action = MSG_FREEZE;
2507 else if (Ustrcmp(argrest, "g") == 0)
2509 msg_action = MSG_DELIVER;
2510 deliver_give_up = TRUE;
2512 else if (Ustrcmp(argrest, "mad") == 0)
2514 msg_action = MSG_MARK_ALL_DELIVERED;
2516 else if (Ustrcmp(argrest, "md") == 0)
2518 msg_action = MSG_MARK_DELIVERED;
2519 one_msg_action = TRUE;
2521 else if (Ustrcmp(argrest, "rm") == 0) msg_action = MSG_REMOVE;
2522 else if (Ustrcmp(argrest, "set") == 0)
2524 msg_action = MSG_LOAD;
2525 one_msg_action = TRUE;
2527 else if (Ustrcmp(argrest, "t") == 0) msg_action = MSG_THAW;
2528 else if (Ustrcmp(argrest, "vb") == 0)
2530 msg_action = MSG_SHOW_BODY;
2531 one_msg_action = TRUE;
2533 else if (Ustrcmp(argrest, "vc") == 0)
2535 msg_action = MSG_SHOW_COPY;
2536 one_msg_action = TRUE;
2538 else if (Ustrcmp(argrest, "vh") == 0)
2540 msg_action = MSG_SHOW_HEADER;
2541 one_msg_action = TRUE;
2543 else if (Ustrcmp(argrest, "vl") == 0)
2545 msg_action = MSG_SHOW_LOG;
2546 one_msg_action = TRUE;
2548 else { badarg = TRUE; break; }
2550 /* All the -Mxx options require at least one message id. */
2552 msg_action_arg = i + 1;
2553 if (msg_action_arg >= argc)
2555 fprintf(stderr, "exim: no message ids given after %s option\n", arg);
2556 return EXIT_FAILURE;
2559 /* Some require only message ids to follow */
2561 if (!one_msg_action)
2564 for (j = msg_action_arg; j < argc; j++) if (!mac_ismsgid(argv[j]))
2566 fprintf(stderr, "exim: malformed message id %s after %s option\n",
2568 return EXIT_FAILURE;
2570 goto END_ARG; /* Remaining args are ids */
2573 /* Others require only one message id, possibly followed by addresses,
2574 which will be handled as normal arguments. */
2578 if (!mac_ismsgid(argv[msg_action_arg]))
2580 fprintf(stderr, "exim: malformed message id %s after %s option\n",
2581 argv[msg_action_arg], arg);
2582 return EXIT_FAILURE;
2589 /* Some programs seem to call the -om option without the leading o;
2590 for sendmail it askes for "me too". Exim always does this. */
2593 if (*argrest != 0) badarg = TRUE;
2597 /* -N: don't do delivery - a debugging option that stops transports doing
2598 their thing. It implies debugging at the D_v level. */
2603 dont_deliver = TRUE;
2604 debug_selector |= D_v;
2605 debug_file = stderr;
2611 /* -n: This means "don't alias" in sendmail, apparently. Just ignore
2617 /* -O: Just ignore it. In sendmail, apparently -O option=value means set
2618 option to the specified value. This form uses long names. We need to handle
2619 -O option=value and -Ooption=value. */
2626 fprintf(stderr, "exim: string expected after -O\n");
2634 /* -oA: Set an argument for the bi command (sendmail's "alternate alias
2637 if (*argrest == 'A')
2639 alias_arg = argrest + 1;
2640 if (alias_arg[0] == 0)
2642 if (i+1 < argc) alias_arg = argv[++i]; else
2644 fprintf(stderr, "exim: string expected after -oA\n");
2650 /* -oB: Set a connection message max value for remote deliveries */
2652 else if (*argrest == 'B')
2654 uschar *p = argrest + 1;
2657 if (i+1 < argc && isdigit((argv[i+1][0]))) p = argv[++i]; else
2659 connection_max_messages = 1;
2668 fprintf(stderr, "exim: number expected after -oB\n");
2671 connection_max_messages = Uatoi(p);
2675 /* -odb: background delivery */
2677 else if (Ustrcmp(argrest, "db") == 0)
2679 synchronous_delivery = FALSE;
2680 arg_queue_only = FALSE;
2681 queue_only_set = TRUE;
2684 /* -odf: foreground delivery (smail-compatible option); same effect as
2685 -odi: interactive (synchronous) delivery (sendmail-compatible option)
2688 else if (Ustrcmp(argrest, "df") == 0 || Ustrcmp(argrest, "di") == 0)
2690 synchronous_delivery = TRUE;
2691 arg_queue_only = FALSE;
2692 queue_only_set = TRUE;
2695 /* -odq: queue only */
2697 else if (Ustrcmp(argrest, "dq") == 0)
2699 synchronous_delivery = FALSE;
2700 arg_queue_only = TRUE;
2701 queue_only_set = TRUE;
2704 /* -odqs: queue SMTP only - do local deliveries and remote routing,
2705 but no remote delivery */
2707 else if (Ustrcmp(argrest, "dqs") == 0)
2710 arg_queue_only = FALSE;
2711 queue_only_set = TRUE;
2714 /* -oex: Sendmail error flags. As these are also accepted without the
2715 leading -o prefix, for compatibility with vacation and other callers,
2716 they are handled with -e above. */
2718 /* -oi: Set flag so dot doesn't end non-SMTP input (same as -i)
2719 -oitrue: Another sendmail syntax for the same */
2721 else if (Ustrcmp(argrest, "i") == 0 ||
2722 Ustrcmp(argrest, "itrue") == 0)
2725 /* -oM*: Set various characteristics for an incoming message; actually
2726 acted on for trusted callers only. */
2728 else if (*argrest == 'M')
2732 fprintf(stderr, "exim: data expected after -o%s\n", argrest);
2736 /* -oMa: Set sender host address */
2738 if (Ustrcmp(argrest, "Ma") == 0) sender_host_address = argv[++i];
2740 /* -oMaa: Set authenticator name */
2742 else if (Ustrcmp(argrest, "Maa") == 0)
2743 sender_host_authenticated = argv[++i];
2745 /* -oMas: setting authenticated sender */
2747 else if (Ustrcmp(argrest, "Mas") == 0) authenticated_sender = argv[++i];
2749 /* -oMai: setting authenticated id */
2751 else if (Ustrcmp(argrest, "Mai") == 0) authenticated_id = argv[++i];
2753 /* -oMi: Set incoming interface address */
2755 else if (Ustrcmp(argrest, "Mi") == 0) interface_address = argv[++i];
2757 /* -oMr: Received protocol */
2759 else if (Ustrcmp(argrest, "Mr") == 0) received_protocol = argv[++i];
2761 /* -oMs: Set sender host name */
2763 else if (Ustrcmp(argrest, "Ms") == 0) sender_host_name = argv[++i];
2765 /* -oMt: Set sender ident */
2767 else if (Ustrcmp(argrest, "Mt") == 0)
2769 sender_ident_set = TRUE;
2770 sender_ident = argv[++i];
2773 /* Else a bad argument */
2782 /* -om: Me-too flag for aliases. Exim always does this. Some programs
2783 seem to call this as -m (undocumented), so that is also accepted (see
2786 else if (Ustrcmp(argrest, "m") == 0) {}
2788 /* -oo: An ancient flag for old-style addresses which still seems to
2789 crop up in some calls (see in SCO). */
2791 else if (Ustrcmp(argrest, "o") == 0) {}
2793 /* -oP <name>: set pid file path for daemon */
2795 else if (Ustrcmp(argrest, "P") == 0)
2796 override_pid_file_path = argv[++i];
2798 /* -or <n>: set timeout for non-SMTP acceptance
2799 -os <n>: set timeout for SMTP acceptance */
2801 else if (*argrest == 'r' || *argrest == 's')
2803 int *tp = (*argrest == 'r')?
2804 &arg_receive_timeout : &arg_smtp_receive_timeout;
2805 if (argrest[1] == 0)
2807 if (i+1 < argc) *tp= readconf_readtime(argv[++i], 0, FALSE);
2809 else *tp = readconf_readtime(argrest + 1, 0, FALSE);
2812 fprintf(stderr, "exim: bad time value %s: abandoned\n", argv[i]);
2817 /* -oX <list>: Override local_interfaces and/or default daemon ports */
2819 else if (Ustrcmp(argrest, "X") == 0)
2820 override_local_interfaces = argv[++i];
2822 /* Unknown -o argument */
2828 /* -ps: force Perl startup; -pd force delayed Perl startup */
2832 if (*argrest == 's' && argrest[1] == 0)
2834 perl_start_option = 1;
2837 if (*argrest == 'd' && argrest[1] == 0)
2839 perl_start_option = -1;
2844 /* -panythingelse is taken as the Sendmail-compatible argument -prval:sval,
2845 which sets the host protocol and host name */
2849 if (i+1 < argc) argrest = argv[++i]; else
2850 { badarg = TRUE; break; }
2855 uschar *hn = Ustrchr(argrest, ':');
2858 received_protocol = argrest;
2862 received_protocol = string_copyn(argrest, hn - argrest);
2863 sender_host_name = hn + 1;
2870 receiving_message = FALSE;
2871 if (queue_interval >= 0)
2873 fprintf(stderr, "exim: -q specified more than once\n");
2877 /* -qq...: Do queue runs in a 2-stage manner */
2879 if (*argrest == 'q')
2881 queue_2stage = TRUE;
2885 /* -qi...: Do only first (initial) deliveries */
2887 if (*argrest == 'i')
2889 queue_run_first_delivery = TRUE;
2893 /* -qf...: Run the queue, forcing deliveries
2894 -qff..: Ditto, forcing thawing as well */
2896 if (*argrest == 'f')
2898 queue_run_force = TRUE;
2899 if (*(++argrest) == 'f')
2901 deliver_force_thaw = TRUE;
2906 /* -q[f][f]l...: Run the queue only on local deliveries */
2908 if (*argrest == 'l')
2910 queue_run_local = TRUE;
2914 /* -q[f][f][l]: Run the queue, optionally forced, optionally local only,
2915 optionally starting from a given message id. */
2917 if (*argrest == 0 &&
2918 (i + 1 >= argc || argv[i+1][0] == '-' || mac_ismsgid(argv[i+1])))
2921 if (i+1 < argc && mac_ismsgid(argv[i+1]))
2922 start_queue_run_id = argv[++i];
2923 if (i+1 < argc && mac_ismsgid(argv[i+1]))
2924 stop_queue_run_id = argv[++i];
2927 /* -q[f][f][l]<n>: Run the queue at regular intervals, optionally forced,
2928 optionally local only. */
2933 queue_interval = readconf_readtime(argrest, 0, FALSE);
2935 queue_interval = readconf_readtime(argv[++i], 0, FALSE);
2936 if (queue_interval <= 0)
2938 fprintf(stderr, "exim: bad time value %s: abandoned\n", argv[i]);
2945 case 'R': /* Synonymous with -qR... */
2946 receiving_message = FALSE;
2948 /* -Rf: As -R (below) but force all deliveries,
2949 -Rff: Ditto, but also thaw all frozen messages,
2950 -Rr: String is regex
2951 -Rrf: Regex and force
2952 -Rrff: Regex and force and thaw
2954 in all cases provided there are no further characters in this
2960 for (i = 0; i < sizeof(rsopts)/sizeof(uschar *); i++)
2962 if (Ustrcmp(argrest, rsopts[i]) == 0)
2964 if (i != 2) queue_run_force = TRUE;
2965 if (i >= 2) deliver_selectstring_regex = TRUE;
2966 if (i == 1 || i == 4) deliver_force_thaw = TRUE;
2967 argrest += Ustrlen(rsopts[i]);
2972 /* -R: Set string to match in addresses for forced queue run to
2973 pick out particular messages. */
2977 if (i+1 < argc) deliver_selectstring = argv[++i]; else
2979 fprintf(stderr, "exim: string expected after -R\n");
2983 else deliver_selectstring = argrest;
2987 /* -r: an obsolete synonym for -f (see above) */
2990 /* -S: Like -R but works on sender. */
2992 case 'S': /* Synonymous with -qS... */
2993 receiving_message = FALSE;
2995 /* -Sf: As -S (below) but force all deliveries,
2996 -Sff: Ditto, but also thaw all frozen messages,
2997 -Sr: String is regex
2998 -Srf: Regex and force
2999 -Srff: Regex and force and thaw
3001 in all cases provided there are no further characters in this
3007 for (i = 0; i < sizeof(rsopts)/sizeof(uschar *); i++)
3009 if (Ustrcmp(argrest, rsopts[i]) == 0)
3011 if (i != 2) queue_run_force = TRUE;
3012 if (i >= 2) deliver_selectstring_sender_regex = TRUE;
3013 if (i == 1 || i == 4) deliver_force_thaw = TRUE;
3014 argrest += Ustrlen(rsopts[i]);
3019 /* -S: Set string to match in addresses for forced queue run to
3020 pick out particular messages. */
3024 if (i+1 < argc) deliver_selectstring_sender = argv[++i]; else
3026 fprintf(stderr, "exim: string expected after -S\n");
3030 else deliver_selectstring_sender = argrest;
3033 /* -Tqt is an option that is exclusively for use by the testing suite.
3034 It is not recognized in other circumstances. It allows for the setting up
3035 of explicit "queue times" so that various warning/retry things can be
3036 tested. Otherwise variability of clock ticks etc. cause problems. */
3039 if (running_in_test_harness && Ustrcmp(argrest, "qt") == 0)
3040 fudged_queue_times = argv[++i];
3045 /* -t: Set flag to extract recipients from body of message. */
3048 if (*argrest == 0) extract_recipients = TRUE;
3050 /* -ti: Set flag to extract recipients from body of message, and also
3051 specify that dot does not end the message. */
3053 else if (Ustrcmp(argrest, "i") == 0)
3055 extract_recipients = TRUE;
3059 /* -tls-on-connect: don't wait for STARTTLS (for old clients) */
3062 else if (Ustrcmp(argrest, "ls-on-connect") == 0) tls_on_connect = TRUE;
3069 /* -U: This means "initial user submission" in sendmail, apparently. The
3070 doc claims that in future sendmail may refuse syntactically invalid
3071 messages instead of fixing them. For the moment, we just ignore it. */
3077 /* -v: verify things - this is a very low-level debugging */
3082 debug_selector |= D_v;
3083 debug_file = stderr;
3089 /* -x: AIX uses this to indicate some fancy 8-bit character stuff:
3091 The -x flag tells the sendmail command that mail from a local
3092 mail program has National Language Support (NLS) extended characters
3093 in the body of the mail item. The sendmail command can send mail with
3094 extended NLS characters across networks that normally corrupts these
3097 As Exim is 8-bit clean, it just ignores this flag. */
3100 if (*argrest != 0) badarg = TRUE;
3103 /* All other initial characters are errors */
3108 } /* End of high-level switch statement */
3110 /* Failed to recognize the option, or syntax error */
3114 fprintf(stderr, "exim abandoned: unknown, malformed, or incomplete "
3115 "option %s\n", arg);
3121 /* If -R or -S have been specified without -q, assume a single queue run. */
3123 if ((deliver_selectstring != NULL || deliver_selectstring_sender != NULL) &&
3124 queue_interval < 0) queue_interval = 0;
3128 /* If usage_wanted is set we call the usage function - which never returns */
3129 if (usage_wanted) exim_usage(called_as);
3131 /* Arguments have been processed. Check for incompatibilities. */
3133 (smtp_input || extract_recipients || recipients_arg < argc) &&
3134 (daemon_listen || queue_interval >= 0 || bi_option ||
3135 test_retry_arg >= 0 || test_rewrite_arg >= 0 ||
3136 filter_test != FTEST_NONE || (msg_action_arg > 0 && !one_msg_action))
3139 msg_action_arg > 0 &&
3140 (daemon_listen || queue_interval >= 0 || list_options ||
3141 (checking && msg_action != MSG_LOAD) ||
3142 bi_option || test_retry_arg >= 0 || test_rewrite_arg >= 0)
3145 (daemon_listen || queue_interval >= 0) &&
3146 (sender_address != NULL || list_options || list_queue || checking ||
3150 daemon_listen && queue_interval == 0
3154 (checking || smtp_input || extract_recipients ||
3155 filter_test != FTEST_NONE || bi_option)
3158 verify_address_mode &&
3159 (address_test_mode || smtp_input || extract_recipients ||
3160 filter_test != FTEST_NONE || bi_option)
3163 address_test_mode && (smtp_input || extract_recipients ||
3164 filter_test != FTEST_NONE || bi_option)
3167 smtp_input && (sender_address != NULL || filter_test != FTEST_NONE ||
3171 deliver_selectstring != NULL && queue_interval < 0
3174 msg_action == MSG_LOAD &&
3175 (!expansion_test || expansion_test_message != NULL)
3179 fprintf(stderr, "exim: incompatible command-line options or arguments\n");
3183 /* If debugging is set up, set the file and the file descriptor to pass on to
3184 child processes. It should, of course, be 2 for stderr. Also, force the daemon
3185 to run in the foreground. */
3187 if (debug_selector != 0)
3189 debug_file = stderr;
3190 debug_fd = fileno(debug_file);
3191 background_daemon = FALSE;
3192 if (running_in_test_harness) millisleep(100); /* lets caller finish */
3193 if (debug_selector != D_v) /* -v only doesn't show this */
3195 debug_printf("Exim version %s uid=%ld gid=%ld pid=%d D=%x\n",
3196 version_string, (long int)real_uid, (long int)real_gid, (int)getpid(),
3198 if (!version_printed)
3199 show_whats_supported(stderr);
3203 /* When started with root privilege, ensure that the limits on the number of
3204 open files and the number of processes (where that is accessible) are
3205 sufficiently large, or are unset, in case Exim has been called from an
3206 environment where the limits are screwed down. Not all OS have the ability to
3207 change some of these limits. */
3211 DEBUG(D_any) debug_print_ids(US"Exim has no root privilege:");
3217 #ifdef RLIMIT_NOFILE
3218 if (getrlimit(RLIMIT_NOFILE, &rlp) < 0)
3220 log_write(0, LOG_MAIN|LOG_PANIC, "getrlimit(RLIMIT_NOFILE) failed: %s",
3222 rlp.rlim_cur = rlp.rlim_max = 0;
3225 /* I originally chose 1000 as a nice big number that was unlikely to
3226 be exceeded. It turns out that some older OS have a fixed upper limit of
3229 if (rlp.rlim_cur < 1000)
3231 rlp.rlim_cur = rlp.rlim_max = 1000;
3232 if (setrlimit(RLIMIT_NOFILE, &rlp) < 0)
3234 rlp.rlim_cur = rlp.rlim_max = 256;
3235 if (setrlimit(RLIMIT_NOFILE, &rlp) < 0)
3236 log_write(0, LOG_MAIN|LOG_PANIC, "setrlimit(RLIMIT_NOFILE) failed: %s",
3243 if (getrlimit(RLIMIT_NPROC, &rlp) < 0)
3245 log_write(0, LOG_MAIN|LOG_PANIC, "getrlimit(RLIMIT_NPROC) failed: %s",
3247 rlp.rlim_cur = rlp.rlim_max = 0;
3250 #ifdef RLIM_INFINITY
3251 if (rlp.rlim_cur != RLIM_INFINITY && rlp.rlim_cur < 1000)
3253 rlp.rlim_cur = rlp.rlim_max = RLIM_INFINITY;
3255 if (rlp.rlim_cur < 1000)
3257 rlp.rlim_cur = rlp.rlim_max = 1000;
3259 if (setrlimit(RLIMIT_NPROC, &rlp) < 0)
3260 log_write(0, LOG_MAIN|LOG_PANIC, "setrlimit(RLIMIT_NPROC) failed: %s",
3266 /* Exim is normally entered as root (but some special configurations are
3267 possible that don't do this). However, it always spins off sub-processes that
3268 set their uid and gid as required for local delivery. We don't want to pass on
3269 any extra groups that root may belong to, so we want to get rid of them all at
3272 We need to obey setgroups() at this stage, before possibly giving up root
3273 privilege for a changed configuration file, but later on we might need to
3274 check on the additional groups for the admin user privilege - can't do that
3275 till after reading the config, which might specify the exim gid. Therefore,
3276 save the group list here first. */
3278 group_count = getgroups(NGROUPS_MAX, group_list);
3280 /* There is a fundamental difference in some BSD systems in the matter of
3281 groups. FreeBSD and BSDI are known to be different; NetBSD and OpenBSD are
3282 known not to be different. On the "different" systems there is a single group
3283 list, and the first entry in it is the current group. On all other versions of
3284 Unix there is a supplementary group list, which is in *addition* to the current
3285 group. Consequently, to get rid of all extraneous groups on a "standard" system
3286 you pass over 0 groups to setgroups(), while on a "different" system you pass
3287 over a single group - the current group, which is always the first group in the
3288 list. Calling setgroups() with zero groups on a "different" system results in
3289 an error return. The following code should cope with both types of system.
3291 However, if this process isn't running as root, setgroups() can't be used
3292 since you have to be root to run it, even if throwing away groups. Not being
3293 root here happens only in some unusual configurations. We just ignore the
3296 if (setgroups(0, NULL) != 0)
3298 if (setgroups(1, group_list) != 0 && !unprivileged)
3300 fprintf(stderr, "exim: setgroups() failed: %s\n", strerror(errno));
3305 /* If the configuration file name has been altered by an argument on the
3306 command line (either a new file name or a macro definition) and the caller is
3307 not root, or if this is a filter testing run, remove any setuid privilege the
3308 program has and run as the underlying user.
3310 The exim user is locked out of this, which severely restricts the use of -C
3313 Otherwise, set the real ids to the effective values (should be root unless run
3314 from inetd, which it can either be root or the exim uid, if one is configured).
3316 There is a private mechanism for bypassing some of this, in order to make it
3317 possible to test lots of configurations automatically, without having either to
3318 recompile each time, or to patch in an actual configuration file name and other
3319 values (such as the path name). If running in the test harness, pretend that
3320 configuration file changes and macro definitions haven't happened. */
3323 (!trusted_config || /* Config changed, or */
3324 !macros_trusted()) && /* impermissible macros and */
3325 real_uid != root_uid && /* Not root, and */
3326 !running_in_test_harness /* Not fudged */
3328 expansion_test /* expansion testing */
3330 filter_test != FTEST_NONE) /* Filter testing */
3332 setgroups(group_count, group_list);
3333 exim_setugid(real_uid, real_gid, FALSE,
3334 US"-C, -D, -be or -bf forces real uid");
3335 removed_privilege = TRUE;
3337 /* In the normal case when Exim is called like this, stderr is available
3338 and should be used for any logging information because attempts to write
3339 to the log will usually fail. To arrange this, we unset really_exim. However,
3340 if no stderr is available there is no point - we might as well have a go
3341 at the log (if it fails, syslog will be written). */
3343 if (log_stderr != NULL) really_exim = FALSE;
3346 /* Privilege is to be retained for the moment. It may be dropped later,
3347 depending on the job that this Exim process has been asked to do. For now, set
3348 the real uid to the effective so that subsequent re-execs of Exim are done by a
3351 else exim_setugid(geteuid(), getegid(), FALSE, US"forcing real = effective");
3353 /* If testing a filter, open the file(s) now, before wasting time doing other
3354 setups and reading the message. */
3356 if ((filter_test & FTEST_SYSTEM) != 0)
3358 filter_sfd = Uopen(filter_test_sfile, O_RDONLY, 0);
3361 fprintf(stderr, "exim: failed to open %s: %s\n", filter_test_sfile,
3363 return EXIT_FAILURE;
3367 if ((filter_test & FTEST_USER) != 0)
3369 filter_ufd = Uopen(filter_test_ufile, O_RDONLY, 0);
3372 fprintf(stderr, "exim: failed to open %s: %s\n", filter_test_ufile,
3374 return EXIT_FAILURE;
3378 /* Read the main runtime configuration data; this gives up if there
3379 is a failure. It leaves the configuration file open so that the subsequent
3380 configuration data for delivery can be read if needed. */
3384 /* Handle the decoding of logging options. */
3386 decode_bits(&log_write_selector, &log_extra_selector, 0, 0,
3387 log_selector_string, log_options, log_options_count, US"log", 0);
3391 debug_printf("configuration file is %s\n", config_main_filename);
3392 debug_printf("log selectors = %08x %08x\n", log_write_selector,
3393 log_extra_selector);
3396 /* If domain literals are not allowed, check the sender address that was
3397 supplied with -f. Ditto for a stripped trailing dot. */
3399 if (sender_address != NULL)
3401 if (sender_address[sender_address_domain] == '[' && !allow_domain_literals)
3403 fprintf(stderr, "exim: bad -f address \"%s\": domain literals not "
3404 "allowed\n", sender_address);
3405 return EXIT_FAILURE;
3407 if (f_end_dot && !strip_trailing_dot)
3409 fprintf(stderr, "exim: bad -f address \"%s.\": domain is malformed "
3410 "(trailing dot not allowed)\n", sender_address);
3411 return EXIT_FAILURE;
3415 /* Paranoia check of maximum lengths of certain strings. There is a check
3416 on the length of the log file path in log.c, which will come into effect
3417 if there are any calls to write the log earlier than this. However, if we
3418 get this far but the string is very long, it is better to stop now than to
3419 carry on and (e.g.) receive a message and then have to collapse. The call to
3420 log_write() from here will cause the ultimate panic collapse if the complete
3421 file name exceeds the buffer length. */
3423 if (Ustrlen(log_file_path) > 200)
3424 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3425 "log_file_path is longer than 200 chars: aborting");
3427 if (Ustrlen(pid_file_path) > 200)
3428 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3429 "pid_file_path is longer than 200 chars: aborting");
3431 if (Ustrlen(spool_directory) > 200)
3432 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3433 "spool_directory is longer than 200 chars: aborting");
3435 /* Length check on the process name given to syslog for its TAG field,
3436 which is only permitted to be 32 characters or less. See RFC 3164. */
3438 if (Ustrlen(syslog_processname) > 32)
3439 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3440 "syslog_processname is longer than 32 chars: aborting");
3442 /* In some operating systems, the environment variable TMPDIR controls where
3443 temporary files are created; Exim doesn't use these (apart from when delivering
3444 to MBX mailboxes), but called libraries such as DBM libraries may require them.
3445 If TMPDIR is found in the environment, reset it to the value defined in the
3446 TMPDIR macro, if this macro is defined. */
3451 for (p = USS environ; *p != NULL; p++)
3453 if (Ustrncmp(*p, "TMPDIR=", 7) == 0 &&
3454 Ustrcmp(*p+7, TMPDIR) != 0)
3456 uschar *newp = malloc(Ustrlen(TMPDIR) + 8);
3457 sprintf(CS newp, "TMPDIR=%s", TMPDIR);
3459 DEBUG(D_any) debug_printf("reset TMPDIR=%s in environment\n", TMPDIR);
3465 /* Timezone handling. If timezone_string is "utc", set a flag to cause all
3466 timestamps to be in UTC (gmtime() is used instead of localtime()). Otherwise,
3467 we may need to get rid of a bogus timezone setting. This can arise when Exim is
3468 called by a user who has set the TZ variable. This then affects the timestamps
3469 in log files and in Received: headers, and any created Date: header lines. The
3470 required timezone is settable in the configuration file, so nothing can be done
3471 about this earlier - but hopefully nothing will normally be logged earlier than
3472 this. We have to make a new environment if TZ is wrong, but don't bother if
3473 timestamps_utc is set, because then all times are in UTC anyway. */
3475 if (timezone_string != NULL && strcmpic(timezone_string, US"UTC") == 0)
3477 timestamps_utc = TRUE;
3481 uschar *envtz = US getenv("TZ");
3482 if ((envtz == NULL && timezone_string != NULL) ||
3484 (timezone_string == NULL ||
3485 Ustrcmp(timezone_string, envtz) != 0)))
3487 uschar **p = USS environ;
3491 while (*p++ != NULL) count++;
3492 if (envtz == NULL) count++;
3493 newp = new = malloc(sizeof(uschar *) * (count + 1));
3494 for (p = USS environ; *p != NULL; p++)
3496 if (Ustrncmp(*p, "TZ=", 3) == 0) continue;
3499 if (timezone_string != NULL)
3501 *newp = malloc(Ustrlen(timezone_string) + 4);
3502 sprintf(CS *newp++, "TZ=%s", timezone_string);
3507 DEBUG(D_any) debug_printf("Reset TZ to %s: time is %s\n", timezone_string,
3508 tod_stamp(tod_log));
3512 /* Handle the case when we have removed the setuid privilege because of -C or
3513 -D. This means that the caller of Exim was not root.
3515 There is a problem if we were running as the Exim user. The sysadmin may
3516 expect this case to retain privilege because "the binary was called by the
3517 Exim user", but it hasn't, because either the -D option set macros, or the
3518 -C option set a non-trusted configuration file. There are two possibilities:
3520 (1) If deliver_drop_privilege is set, Exim is not going to re-exec in order
3521 to do message deliveries. Thus, the fact that it is running as a
3522 non-privileged user is plausible, and might be wanted in some special
3523 configurations. However, really_exim will have been set false when
3524 privilege was dropped, to stop Exim trying to write to its normal log
3525 files. Therefore, re-enable normal log processing, assuming the sysadmin
3526 has set up the log directory correctly.
3528 (2) If deliver_drop_privilege is not set, the configuration won't work as
3529 apparently intended, and so we log a panic message. In order to retain
3530 root for -C or -D, the caller must either be root or be invoking a
3531 trusted configuration file (when deliver_drop_privilege is false). */
3533 if (removed_privilege && (!trusted_config || macros != NULL) &&
3534 real_uid == exim_uid)
3536 if (deliver_drop_privilege)
3537 really_exim = TRUE; /* let logging work normally */
3539 log_write(0, LOG_MAIN|LOG_PANIC,
3540 "exim user lost privilege for using %s option",
3541 trusted_config? "-D" : "-C");
3544 /* Start up Perl interpreter if Perl support is configured and there is a
3545 perl_startup option, and the configuration or the command line specifies
3546 initializing starting. Note that the global variables are actually called
3547 opt_perl_xxx to avoid clashing with perl's namespace (perl_*). */
3550 if (perl_start_option != 0)
3551 opt_perl_at_start = (perl_start_option > 0);
3552 if (opt_perl_at_start && opt_perl_startup != NULL)
3555 DEBUG(D_any) debug_printf("Starting Perl interpreter\n");
3556 errstr = init_perl(opt_perl_startup);
3559 fprintf(stderr, "exim: error in perl_startup code: %s\n", errstr);
3560 return EXIT_FAILURE;
3562 opt_perl_started = TRUE;
3564 #endif /* EXIM_PERL */
3566 /* Initialise lookup_list
3567 If debugging, already called above via version reporting.
3568 This does mean that debugging causes the list to be initialised while root.
3569 This *should* be harmless -- all modules are loaded from a fixed dir and
3570 it's code that would, if not a module, be part of Exim already. */
3573 /* Log the arguments of the call if the configuration file said so. This is
3574 a debugging feature for finding out what arguments certain MUAs actually use.
3575 Don't attempt it if logging is disabled, or if listing variables or if
3576 verifying/testing addresses or expansions. */
3578 if (((debug_selector & D_any) != 0 || (log_extra_selector & LX_arguments) != 0)
3579 && really_exim && !list_options && !checking)
3582 uschar *p = big_buffer;
3584 (void)getcwd(CS p+4, big_buffer_size - 4);
3586 (void)string_format(p, big_buffer_size - (p - big_buffer), " %d args:", argc);
3588 for (i = 0; i < argc; i++)
3590 int len = Ustrlen(argv[i]);
3593 if (p + len + 8 >= big_buffer + big_buffer_size)
3596 log_write(0, LOG_MAIN, "%s", big_buffer);
3597 Ustrcpy(big_buffer, "...");
3600 printing = string_printing(argv[i]);
3601 if (printing[0] == 0) quote = US"\""; else
3603 uschar *pp = printing;
3605 while (*pp != 0) if (isspace(*pp++)) { quote = US"\""; break; }
3607 sprintf(CS p, " %s%.*s%s", quote, (int)(big_buffer_size -
3608 (p - big_buffer) - 4), printing, quote);
3612 if ((log_extra_selector & LX_arguments) != 0)
3613 log_write(0, LOG_MAIN, "%s", big_buffer);
3615 debug_printf("%s\n", big_buffer);
3618 /* Set the working directory to be the top-level spool directory. We don't rely
3619 on this in the code, which always uses fully qualified names, but it's useful
3620 for core dumps etc. Don't complain if it fails - the spool directory might not
3621 be generally accessible and calls with the -C option (and others) have lost
3622 privilege by now. Before the chdir, we try to ensure that the directory exists.
3625 if (Uchdir(spool_directory) != 0)
3627 (void)directory_make(spool_directory, US"", SPOOL_DIRECTORY_MODE, FALSE);
3628 (void)Uchdir(spool_directory);
3631 /* Handle calls with the -bi option. This is a sendmail option to rebuild *the*
3632 alias file. Exim doesn't have such a concept, but this call is screwed into
3633 Sun's YP makefiles. Handle this by calling a configured script, as the real
3634 user who called Exim. The -oA option can be used to pass an argument to the
3639 (void)fclose(config_file);
3640 if (bi_command != NULL)
3644 argv[i++] = bi_command;
3645 if (alias_arg != NULL) argv[i++] = alias_arg;
3648 setgroups(group_count, group_list);
3649 exim_setugid(real_uid, real_gid, FALSE, US"running bi_command");
3651 DEBUG(D_exec) debug_printf("exec %.256s %.256s\n", argv[0],
3652 (argv[1] == NULL)? US"" : argv[1]);
3654 execv(CS argv[0], (char *const *)argv);
3655 fprintf(stderr, "exim: exec failed: %s\n", strerror(errno));
3660 DEBUG(D_any) debug_printf("-bi used but bi_command not set; exiting\n");
3665 /* If an action on specific messages is requested, or if a daemon or queue
3666 runner is being started, we need to know if Exim was called by an admin user.
3667 This is the case if the real user is root or exim, or if the real group is
3668 exim, or if one of the supplementary groups is exim or a group listed in
3669 admin_groups. We don't fail all message actions immediately if not admin_user,
3670 since some actions can be performed by non-admin users. Instead, set admin_user
3671 for later interrogation. */
3673 if (real_uid == root_uid || real_uid == exim_uid || real_gid == exim_gid)
3678 for (i = 0; i < group_count; i++)
3680 if (group_list[i] == exim_gid) admin_user = TRUE;
3681 else if (admin_groups != NULL)
3683 for (j = 1; j <= (int)(admin_groups[0]); j++)
3684 if (admin_groups[j] == group_list[i])
3685 { admin_user = TRUE; break; }
3687 if (admin_user) break;
3691 /* Another group of privileged users are the trusted users. These are root,
3692 exim, and any caller matching trusted_users or trusted_groups. Trusted callers
3693 are permitted to specify sender_addresses with -f on the command line, and
3694 other message parameters as well. */
3696 if (real_uid == root_uid || real_uid == exim_uid)
3697 trusted_caller = TRUE;
3702 if (trusted_users != NULL)
3704 for (i = 1; i <= (int)(trusted_users[0]); i++)
3705 if (trusted_users[i] == real_uid)
3706 { trusted_caller = TRUE; break; }
3709 if (!trusted_caller && trusted_groups != NULL)
3711 for (i = 1; i <= (int)(trusted_groups[0]); i++)
3713 if (trusted_groups[i] == real_gid)
3714 trusted_caller = TRUE;
3715 else for (j = 0; j < group_count; j++)
3717 if (trusted_groups[i] == group_list[j])
3718 { trusted_caller = TRUE; break; }
3720 if (trusted_caller) break;
3725 if (trusted_caller) DEBUG(D_any) debug_printf("trusted user\n");
3726 if (admin_user) DEBUG(D_any) debug_printf("admin user\n");
3728 /* Only an admin user may start the daemon or force a queue run in the default
3729 configuration, but the queue run restriction can be relaxed. Only an admin
3730 user may request that a message be returned to its sender forthwith. Only an
3731 admin user may specify a debug level greater than D_v (because it might show
3732 passwords, etc. in lookup queries). Only an admin user may request a queue
3733 count. Only an admin user can use the test interface to scan for email
3734 (because Exim will be in the spool dir and able to look at mails). */
3738 BOOL debugset = (debug_selector & ~D_v) != 0;
3739 if (deliver_give_up || daemon_listen || malware_test_file ||
3740 (count_queue && queue_list_requires_admin) ||
3741 (list_queue && queue_list_requires_admin) ||
3742 (queue_interval >= 0 && prod_requires_admin) ||
3743 (debugset && !running_in_test_harness))
3745 fprintf(stderr, "exim:%s permission denied\n", debugset? " debugging" : "");
3750 /* If the real user is not root or the exim uid, the argument for passing
3751 in an open TCP/IP connection for another message is not permitted, nor is
3752 running with the -N option for any delivery action, unless this call to exim is
3753 one that supplied an input message, or we are using a patched exim for
3754 regression testing. */
3756 if (real_uid != root_uid && real_uid != exim_uid &&
3757 (continue_hostname != NULL ||
3759 (queue_interval >= 0 || daemon_listen || msg_action_arg > 0)
3760 )) && !running_in_test_harness)
3762 fprintf(stderr, "exim: Permission denied\n");
3763 return EXIT_FAILURE;
3766 /* If the caller is not trusted, certain arguments are ignored when running for
3767 real, but are permitted when checking things (-be, -bv, -bt, -bh, -bf, -bF).
3768 Note that authority for performing certain actions on messages is tested in the
3769 queue_action() function. */
3771 if (!trusted_caller && !checking && filter_test == FTEST_NONE)
3773 sender_host_name = sender_host_address = interface_address =
3774 sender_ident = received_protocol = NULL;
3775 sender_host_port = interface_port = 0;
3776 sender_host_authenticated = authenticated_sender = authenticated_id = NULL;
3779 /* If a sender host address is set, extract the optional port number off the
3780 end of it and check its syntax. Do the same thing for the interface address.
3781 Exim exits if the syntax is bad. */
3785 if (sender_host_address != NULL)
3786 sender_host_port = check_port(sender_host_address);
3787 if (interface_address != NULL)
3788 interface_port = check_port(interface_address);
3791 /* If an SMTP message is being received check to see if the standard input is a
3792 TCP/IP socket. If it is, we assume that Exim was called from inetd if the
3793 caller is root or the Exim user, or if the port is a privileged one. Otherwise,
3798 union sockaddr_46 inetd_sock;
3799 EXIM_SOCKLEN_T size = sizeof(inetd_sock);
3800 if (getpeername(0, (struct sockaddr *)(&inetd_sock), &size) == 0)
3802 int family = ((struct sockaddr *)(&inetd_sock))->sa_family;
3803 if (family == AF_INET || family == AF_INET6)
3805 union sockaddr_46 interface_sock;
3806 size = sizeof(interface_sock);
3808 if (getsockname(0, (struct sockaddr *)(&interface_sock), &size) == 0)
3809 interface_address = host_ntoa(-1, &interface_sock, NULL,
3812 if (host_is_tls_on_connect_port(interface_port)) tls_on_connect = TRUE;
3814 if (real_uid == root_uid || real_uid == exim_uid || interface_port < 1024)
3817 sender_host_address = host_ntoa(-1, (struct sockaddr *)(&inetd_sock),
3818 NULL, &sender_host_port);
3819 if (mua_wrapper) log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Input from "
3820 "inetd is not supported when mua_wrapper is set");
3825 "exim: Permission denied (unprivileged user, unprivileged port)\n");
3826 return EXIT_FAILURE;
3832 /* If the load average is going to be needed while receiving a message, get it
3833 now for those OS that require the first call to os_getloadavg() to be done as
3834 root. There will be further calls later for each message received. */
3836 #ifdef LOAD_AVG_NEEDS_ROOT
3837 if (receiving_message &&
3838 (queue_only_load >= 0 ||
3839 (is_inetd && smtp_load_reserve >= 0)
3842 load_average = OS_GETLOADAVG();
3846 /* The queue_only configuration option can be overridden by -odx on the command
3847 line, except that if queue_only_override is false, queue_only cannot be unset
3848 from the command line. */
3850 if (queue_only_set && (queue_only_override || arg_queue_only))
3851 queue_only = arg_queue_only;
3853 /* The receive_timeout and smtp_receive_timeout options can be overridden by
3856 if (arg_receive_timeout >= 0) receive_timeout = arg_receive_timeout;
3857 if (arg_smtp_receive_timeout >= 0)
3858 smtp_receive_timeout = arg_smtp_receive_timeout;
3860 /* If Exim was started with root privilege, unless we have already removed the
3861 root privilege above as a result of -C, -D, -be, -bf or -bF, remove it now
3862 except when starting the daemon or doing some kind of delivery or address
3863 testing (-bt). These are the only cases when root need to be retained. We run
3864 as exim for -bv and -bh. However, if deliver_drop_privilege is set, root is
3865 retained only for starting the daemon. We always do the initgroups() in this
3866 situation (controlled by the TRUE below), in order to be as close as possible
3867 to the state Exim usually runs in. */
3869 if (!unprivileged && /* originally had root AND */
3870 !removed_privilege && /* still got root AND */
3871 !daemon_listen && /* not starting the daemon */
3872 queue_interval <= 0 && /* (either kind of daemon) */
3874 deliver_drop_privilege || /* requested unprivileged */
3876 queue_interval < 0 && /* not running the queue */
3877 (msg_action_arg < 0 || /* and */
3878 msg_action != MSG_DELIVER) && /* not delivering and */
3879 (!checking || !address_test_mode) /* not address checking */
3883 exim_setugid(exim_uid, exim_gid, TRUE, US"privilege not needed");
3886 /* When we are retaining a privileged uid, we still change to the exim gid. */
3891 rv = setgid(exim_gid);
3892 /* Impact of failure is that some stuff might end up with an incorrect group.
3893 We track this for failures from root, since any attempt to change privilege
3894 by root should succeed and failures should be examined. For non-root,
3895 there's no security risk. For me, it's { exim -bV } on a just-built binary,
3896 no need to complain then. */
3899 if (!(unprivileged || removed_privilege))
3902 "exim: changing group failed: %s\n", strerror(errno));
3906 DEBUG(D_any) debug_printf("changing group to %ld failed: %s\n",
3907 (long int)exim_gid, strerror(errno));
3911 /* Handle a request to scan a file for malware */
3912 if (malware_test_file)
3914 #ifdef WITH_CONTENT_SCAN
3916 set_process_info("scanning file for malware");
3917 result = malware_in_file(malware_test_file);
3920 printf("No malware found.\n");
3925 printf("Malware lookup returned non-okay/fail: %d\n", result);
3929 printf("Malware found: %s\n", malware_name);
3931 printf("Malware scan detected malware of unknown name.\n");
3933 printf("Malware scanning not enabled at compile time.\n");
3938 /* Handle a request to list the delivery queue */
3942 set_process_info("listing the queue");
3943 queue_list(list_queue_option, argv + recipients_arg, argc - recipients_arg);
3947 /* Handle a request to count the delivery queue */
3951 set_process_info("counting the queue");
3956 /* Handle actions on specific messages, except for the force delivery and
3957 message load actions, which are done below. Some actions take a whole list of
3958 message ids, which are known to continue up to the end of the arguments. Others
3959 take a single message id and then operate on the recipients list. */
3961 if (msg_action_arg > 0 && msg_action != MSG_DELIVER && msg_action != MSG_LOAD)
3963 int yield = EXIT_SUCCESS;
3964 set_process_info("acting on specified messages");
3966 if (!one_msg_action)
3968 for (i = msg_action_arg; i < argc; i++)
3969 if (!queue_action(argv[i], msg_action, NULL, 0, 0))
3970 yield = EXIT_FAILURE;
3973 else if (!queue_action(argv[msg_action_arg], msg_action, argv, argc,
3974 recipients_arg)) yield = EXIT_FAILURE;
3978 /* All the modes below here require the remaining configuration sections
3979 to be read, except that we can skip over the ACL setting when delivering
3980 specific messages, or doing a queue run. (For various testing cases we could
3981 skip too, but as they are rare, it doesn't really matter.) The argument is TRUE
3984 readconf_rest(msg_action_arg > 0 || (queue_interval == 0 && !daemon_listen));
3986 /* The configuration data will have been read into POOL_PERM because we won't
3987 ever want to reset back past it. Change the current pool to POOL_MAIN. In fact,
3988 this is just a bit of pedantic tidiness. It wouldn't really matter if the
3989 configuration were read into POOL_MAIN, because we don't do any resets till
3990 later on. However, it seems right, and it does ensure that both pools get used.
3993 store_pool = POOL_MAIN;
3995 /* Handle the -brt option. This is for checking out retry configurations.
3996 The next three arguments are a domain name or a complete address, and
3997 optionally two error numbers. All it does is to call the function that
3998 scans the retry configuration data. */
4000 if (test_retry_arg >= 0)
4002 retry_config *yield;
4003 int basic_errno = 0;
4007 if (test_retry_arg >= argc)
4009 printf("-brt needs a domain or address argument\n");
4010 exim_exit(EXIT_FAILURE);
4012 s1 = argv[test_retry_arg++];
4015 /* If the first argument contains no @ and no . it might be a local user
4016 or it might be a single-component name. Treat as a domain. */
4018 if (Ustrchr(s1, '@') == NULL && Ustrchr(s1, '.') == NULL)
4020 printf("Warning: \"%s\" contains no '@' and no '.' characters. It is "
4021 "being \ntreated as a one-component domain, not as a local part.\n\n",
4025 /* There may be an optional second domain arg. */
4027 if (test_retry_arg < argc && Ustrchr(argv[test_retry_arg], '.') != NULL)
4028 s2 = argv[test_retry_arg++];
4030 /* The final arg is an error name */
4032 if (test_retry_arg < argc)
4034 uschar *ss = argv[test_retry_arg];
4036 readconf_retry_error(ss, ss + Ustrlen(ss), &basic_errno, &more_errno);
4039 printf("%s\n", CS error);
4040 return EXIT_FAILURE;
4043 /* For the {MAIL,RCPT,DATA}_4xx errors, a value of 255 means "any", and a
4044 code > 100 as an error is for matching codes to the decade. Turn them into
4045 a real error code, off the decade. */
4047 if (basic_errno == ERRNO_MAIL4XX ||
4048 basic_errno == ERRNO_RCPT4XX ||
4049 basic_errno == ERRNO_DATA4XX)
4051 int code = (more_errno >> 8) & 255;
4053 more_errno = (more_errno & 0xffff00ff) | (21 << 8);
4054 else if (code > 100)
4055 more_errno = (more_errno & 0xffff00ff) | ((code - 96) << 8);
4059 yield = retry_find_config(s1, s2, basic_errno, more_errno);
4060 if (yield == NULL) printf("No retry information found\n"); else
4063 more_errno = yield->more_errno;
4064 printf("Retry rule: %s ", yield->pattern);
4066 if (yield->basic_errno == ERRNO_EXIMQUOTA)
4068 printf("quota%s%s ",
4069 (more_errno > 0)? "_" : "",
4070 (more_errno > 0)? readconf_printtime(more_errno) : US"");
4072 else if (yield->basic_errno == ECONNREFUSED)
4074 printf("refused%s%s ",
4075 (more_errno > 0)? "_" : "",
4076 (more_errno == 'M')? "MX" :
4077 (more_errno == 'A')? "A" : "");
4079 else if (yield->basic_errno == ETIMEDOUT)
4082 if ((more_errno & RTEF_CTOUT) != 0) printf("_connect");
4084 if (more_errno != 0) printf("_%s",
4085 (more_errno == 'M')? "MX" : "A");
4088 else if (yield->basic_errno == ERRNO_AUTHFAIL)
4089 printf("auth_failed ");
4092 for (r = yield->rules; r != NULL; r = r->next)
4094 printf("%c,%s", r->rule, readconf_printtime(r->timeout)); /* Do not */
4095 printf(",%s", readconf_printtime(r->p1)); /* amalgamate */
4101 printf(",%d.", x/1000);
4115 exim_exit(EXIT_SUCCESS);
4118 /* Handle a request to list one or more configuration options */
4122 set_process_info("listing variables");
4123 if (recipients_arg >= argc) readconf_print(US"all", NULL);
4124 else for (i = recipients_arg; i < argc; i++)
4127 (Ustrcmp(argv[i], "router") == 0 ||
4128 Ustrcmp(argv[i], "transport") == 0 ||
4129 Ustrcmp(argv[i], "authenticator") == 0 ||
4130 Ustrcmp(argv[i], "macro") == 0))
4132 readconf_print(argv[i+1], argv[i]);
4135 else readconf_print(argv[i], NULL);
4137 exim_exit(EXIT_SUCCESS);
4141 /* Handle a request to deliver one or more messages that are already on the
4142 queue. Values of msg_action other than MSG_DELIVER and MSG_LOAD are dealt with
4143 above. MSG_LOAD is handled with -be (which is the only time it applies) below.
4145 Delivery of specific messages is typically used for a small number when
4146 prodding by hand (when the option forced_delivery will be set) or when
4147 re-execing to regain root privilege. Each message delivery must happen in a
4148 separate process, so we fork a process for each one, and run them sequentially
4149 so that debugging output doesn't get intertwined, and to avoid spawning too
4150 many processes if a long list is given. However, don't fork for the last one;
4151 this saves a process in the common case when Exim is called to deliver just one
4154 if (msg_action_arg > 0 && msg_action != MSG_LOAD)
4156 if (prod_requires_admin && !admin_user)
4158 fprintf(stderr, "exim: Permission denied\n");
4159 exim_exit(EXIT_FAILURE);
4161 set_process_info("delivering specified messages");
4162 if (deliver_give_up) forced_delivery = deliver_force_thaw = TRUE;
4163 for (i = msg_action_arg; i < argc; i++)
4168 (void)deliver_message(argv[i], forced_delivery, deliver_give_up);
4169 else if ((pid = fork()) == 0)
4171 (void)deliver_message(argv[i], forced_delivery, deliver_give_up);
4172 _exit(EXIT_SUCCESS);
4176 fprintf(stderr, "failed to fork delivery process for %s: %s\n", argv[i],
4178 exim_exit(EXIT_FAILURE);
4182 exim_exit(EXIT_SUCCESS);
4186 /* If only a single queue run is requested, without SMTP listening, we can just
4187 turn into a queue runner, with an optional starting message id. */
4189 if (queue_interval == 0 && !daemon_listen)
4191 DEBUG(D_queue_run) debug_printf("Single queue run%s%s%s%s\n",
4192 (start_queue_run_id == NULL)? US"" : US" starting at ",
4193 (start_queue_run_id == NULL)? US"" : start_queue_run_id,
4194 (stop_queue_run_id == NULL)? US"" : US" stopping at ",
4195 (stop_queue_run_id == NULL)? US"" : stop_queue_run_id);
4196 set_process_info("running the queue (single queue run)");
4197 queue_run(start_queue_run_id, stop_queue_run_id, FALSE);
4198 exim_exit(EXIT_SUCCESS);
4202 /* Find the login name of the real user running this process. This is always
4203 needed when receiving a message, because it is written into the spool file. It
4204 may also be used to construct a from: or a sender: header, and in this case we
4205 need the user's full name as well, so save a copy of it, checked for RFC822
4206 syntax and munged if necessary, if it hasn't previously been set by the -F
4207 argument. We may try to get the passwd entry more than once, in case NIS or
4208 other delays are in evidence. Save the home directory for use in filter testing
4213 if ((pw = getpwuid(real_uid)) != NULL)
4215 originator_login = string_copy(US pw->pw_name);
4216 originator_home = string_copy(US pw->pw_dir);
4218 /* If user name has not been set by -F, set it from the passwd entry
4219 unless -f has been used to set the sender address by a trusted user. */
4221 if (originator_name == NULL)
4223 if (sender_address == NULL ||
4224 (!trusted_caller && filter_test == FTEST_NONE))
4226 uschar *name = US pw->pw_gecos;
4227 uschar *amp = Ustrchr(name, '&');
4230 /* Most Unix specify that a '&' character in the gecos field is
4231 replaced by a copy of the login name, and some even specify that
4232 the first character should be upper cased, so that's what we do. */
4237 string_format(buffer, sizeof(buffer), "%.*s%n%s%s",
4238 amp - name, name, &loffset, originator_login, amp + 1);
4239 buffer[loffset] = toupper(buffer[loffset]);
4243 /* If a pattern for matching the gecos field was supplied, apply
4244 it and then expand the name string. */
4246 if (gecos_pattern != NULL && gecos_name != NULL)
4249 re = regex_must_compile(gecos_pattern, FALSE, TRUE); /* Use malloc */
4251 if (regex_match_and_setup(re, name, 0, -1))
4253 uschar *new_name = expand_string(gecos_name);
4255 if (new_name != NULL)
4257 DEBUG(D_receive) debug_printf("user name \"%s\" extracted from "
4258 "gecos field \"%s\"\n", new_name, name);
4261 else DEBUG(D_receive) debug_printf("failed to expand gecos_name string "
4262 "\"%s\": %s\n", gecos_name, expand_string_message);
4264 else DEBUG(D_receive) debug_printf("gecos_pattern \"%s\" did not match "
4265 "gecos field \"%s\"\n", gecos_pattern, name);
4266 store_free((void *)re);
4268 originator_name = string_copy(name);
4271 /* A trusted caller has used -f but not -F */
4273 else originator_name = US"";
4276 /* Break the retry loop */
4281 if (++i > finduser_retries) break;
4285 /* If we cannot get a user login, log the incident and give up, unless the
4286 configuration specifies something to use. When running in the test harness,
4287 any setting of unknown_login overrides the actual name. */
4289 if (originator_login == NULL || running_in_test_harness)
4291 if (unknown_login != NULL)
4293 originator_login = expand_string(unknown_login);
4294 if (originator_name == NULL && unknown_username != NULL)
4295 originator_name = expand_string(unknown_username);
4296 if (originator_name == NULL) originator_name = US"";
4298 if (originator_login == NULL)
4299 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Failed to get user name for uid %d",
4303 /* Ensure that the user name is in a suitable form for use as a "phrase" in an
4306 originator_name = string_copy(parse_fix_phrase(originator_name,
4307 Ustrlen(originator_name), big_buffer, big_buffer_size));
4309 /* If a message is created by this call of Exim, the uid/gid of its originator
4310 are those of the caller. These values are overridden if an existing message is
4311 read in from the spool. */
4313 originator_uid = real_uid;
4314 originator_gid = real_gid;
4316 DEBUG(D_receive) debug_printf("originator: uid=%d gid=%d login=%s name=%s\n",
4317 (int)originator_uid, (int)originator_gid, originator_login, originator_name);
4319 /* Run in daemon and/or queue-running mode. The function daemon_go() never
4320 returns. We leave this till here so that the originator_ fields are available
4321 for incoming messages via the daemon. The daemon cannot be run in mua_wrapper
4324 if (daemon_listen || queue_interval > 0)
4328 fprintf(stderr, "Daemon cannot be run when mua_wrapper is set\n");
4329 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Daemon cannot be run when "
4330 "mua_wrapper is set");
4335 /* If the sender ident has not been set (by a trusted caller) set it to
4336 the caller. This will get overwritten below for an inetd call. If a trusted
4337 caller has set it empty, unset it. */
4339 if (sender_ident == NULL) sender_ident = originator_login;
4340 else if (sender_ident[0] == 0) sender_ident = NULL;
4342 /* Handle the -brw option, which is for checking out rewriting rules. Cause log
4343 writes (on errors) to go to stderr instead. Can't do this earlier, as want the
4344 originator_* variables set. */
4346 if (test_rewrite_arg >= 0)
4348 really_exim = FALSE;
4349 if (test_rewrite_arg >= argc)
4351 printf("-brw needs an address argument\n");
4352 exim_exit(EXIT_FAILURE);
4354 rewrite_test(argv[test_rewrite_arg]);
4355 exim_exit(EXIT_SUCCESS);
4358 /* A locally-supplied message is considered to be coming from a local user
4359 unless a trusted caller supplies a sender address with -f, or is passing in the
4360 message via SMTP (inetd invocation or otherwise). */
4362 if ((sender_address == NULL && !smtp_input) ||
4363 (!trusted_caller && filter_test == FTEST_NONE))
4365 sender_local = TRUE;
4367 /* A trusted caller can supply authenticated_sender and authenticated_id
4368 via -oMas and -oMai and if so, they will already be set. Otherwise, force
4369 defaults except when host checking. */
4371 if (authenticated_sender == NULL && !host_checking)
4372 authenticated_sender = string_sprintf("%s@%s", originator_login,
4373 qualify_domain_sender);
4374 if (authenticated_id == NULL && !host_checking)
4375 authenticated_id = originator_login;
4378 /* Trusted callers are always permitted to specify the sender address.
4379 Untrusted callers may specify it if it matches untrusted_set_sender, or if what
4380 is specified is the empty address. However, if a trusted caller does not
4381 specify a sender address for SMTP input, we leave sender_address unset. This
4382 causes the MAIL commands to be honoured. */
4384 if ((!smtp_input && sender_address == NULL) ||
4385 !receive_check_set_sender(sender_address))
4387 /* Either the caller is not permitted to set a general sender, or this is
4388 non-SMTP input and the trusted caller has not set a sender. If there is no
4389 sender, or if a sender other than <> is set, override with the originator's
4390 login (which will get qualified below), except when checking things. */
4392 if (sender_address == NULL /* No sender_address set */
4394 (sender_address[0] != 0 && /* Non-empty sender address, AND */
4395 !checking && /* Not running tests, AND */
4396 filter_test == FTEST_NONE)) /* Not testing a filter */
4398 sender_address = originator_login;
4399 sender_address_forced = FALSE;
4400 sender_address_domain = 0;
4404 /* Remember whether an untrusted caller set the sender address */
4406 sender_set_untrusted = sender_address != originator_login && !trusted_caller;
4408 /* Ensure that the sender address is fully qualified unless it is the empty
4409 address, which indicates an error message, or doesn't exist (root caller, smtp
4410 interface, no -f argument). */
4412 if (sender_address != NULL && sender_address[0] != 0 &&
4413 sender_address_domain == 0)
4414 sender_address = string_sprintf("%s@%s", local_part_quote(sender_address),
4415 qualify_domain_sender);
4417 DEBUG(D_receive) debug_printf("sender address = %s\n", sender_address);
4419 /* Handle a request to verify a list of addresses, or test them for delivery.
4420 This must follow the setting of the sender address, since routers can be
4421 predicated upon the sender. If no arguments are given, read addresses from
4422 stdin. Set debug_level to at least D_v to get full output for address testing.
4425 if (verify_address_mode || address_test_mode)
4428 int flags = vopt_qualify;
4430 if (verify_address_mode)
4432 if (!verify_as_sender) flags |= vopt_is_recipient;
4433 DEBUG(D_verify) debug_print_ids(US"Verifying:");
4438 flags |= vopt_is_recipient;
4439 debug_selector |= D_v;
4440 debug_file = stderr;
4441 debug_fd = fileno(debug_file);
4442 DEBUG(D_verify) debug_print_ids(US"Address testing:");
4445 if (recipients_arg < argc)
4447 while (recipients_arg < argc)
4449 uschar *s = argv[recipients_arg++];
4452 BOOL finished = FALSE;
4453 uschar *ss = parse_find_address_end(s, FALSE);
4454 if (*ss == ',') *ss = 0; else finished = TRUE;
4455 test_address(s, flags, &exit_value);
4458 while (*(++s) != 0 && (*s == ',' || isspace(*s)));
4465 uschar *s = get_stdinput(NULL, NULL);
4466 if (s == NULL) break;
4467 test_address(s, flags, &exit_value);
4471 exim_exit(exit_value);
4474 /* Handle expansion checking. Either expand items on the command line, or read
4475 from stdin if there aren't any. If -Mset was specified, load the message so
4476 that its variables can be used, but restrict this facility to admin users.
4477 Otherwise, if -bem was used, read a message from stdin. */
4481 if (msg_action_arg > 0 && msg_action == MSG_LOAD)
4483 uschar spoolname[256]; /* Not big_buffer; used in spool_read_header() */
4486 fprintf(stderr, "exim: permission denied\n");
4489 message_id = argv[msg_action_arg];
4490 (void)string_format(spoolname, sizeof(spoolname), "%s-H", message_id);
4491 if (!spool_open_datafile(message_id))
4492 printf ("Failed to load message datafile %s\n", message_id);
4493 if (spool_read_header(spoolname, TRUE, FALSE) != spool_read_OK)
4494 printf ("Failed to load message %s\n", message_id);
4497 /* Read a test message from a file. We fudge it up to be on stdin, saving
4498 stdin itself for later reading of expansion strings. */
4500 else if (expansion_test_message != NULL)
4502 int save_stdin = dup(0);
4503 int fd = Uopen(expansion_test_message, O_RDONLY, 0);
4506 fprintf(stderr, "exim: failed to open %s: %s\n", expansion_test_message,
4508 return EXIT_FAILURE;
4511 filter_test = FTEST_USER; /* Fudge to make it look like filter test */
4512 message_ended = END_NOTENDED;
4513 read_message_body(receive_msg(extract_recipients));
4514 message_linecount += body_linecount;
4515 (void)dup2(save_stdin, 0);
4516 (void)close(save_stdin);
4517 clearerr(stdin); /* Required by Darwin */
4520 /* Allow $recipients for this testing */
4522 enable_dollar_recipients = TRUE;
4524 /* Expand command line items */
4526 if (recipients_arg < argc)
4528 while (recipients_arg < argc)
4530 uschar *s = argv[recipients_arg++];
4531 uschar *ss = expand_string(s);
4532 if (ss == NULL) printf ("Failed: %s\n", expand_string_message);
4533 else printf("%s\n", CS ss);
4541 char *(*fn_readline)(char *) = NULL;
4542 char *(*fn_addhist)(char *) = NULL;
4545 void *dlhandle = set_readline(&fn_readline, &fn_addhist);
4551 uschar *source = get_stdinput(fn_readline, fn_addhist);
4552 if (source == NULL) break;
4553 ss = expand_string(source);
4555 printf ("Failed: %s\n", expand_string_message);
4556 else printf("%s\n", CS ss);
4560 if (dlhandle != NULL) dlclose(dlhandle);
4564 /* The data file will be open after -Mset */
4566 if (deliver_datafile >= 0)
4568 (void)close(deliver_datafile);
4569 deliver_datafile = -1;
4572 exim_exit(EXIT_SUCCESS);
4576 /* The active host name is normally the primary host name, but it can be varied
4577 for hosts that want to play several parts at once. We need to ensure that it is
4578 set for host checking, and for receiving messages. */
4580 smtp_active_hostname = primary_hostname;
4581 if (raw_active_hostname != NULL)
4583 uschar *nah = expand_string(raw_active_hostname);
4586 if (!expand_string_forcedfail)
4587 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to expand \"%s\" "
4588 "(smtp_active_hostname): %s", raw_active_hostname,
4589 expand_string_message);
4591 else if (nah[0] != 0) smtp_active_hostname = nah;
4594 /* Handle host checking: this facility mocks up an incoming SMTP call from a
4595 given IP address so that the blocking and relay configuration can be tested.
4596 Unless a sender_ident was set by -oMt, we discard it (the default is the
4597 caller's login name). An RFC 1413 call is made only if we are running in the
4598 test harness and an incoming interface and both ports are specified, because
4599 there is no TCP/IP call to find the ident for. */
4606 if (!sender_ident_set)
4608 sender_ident = NULL;
4609 if (running_in_test_harness && sender_host_port != 0 &&
4610 interface_address != NULL && interface_port != 0)
4611 verify_get_ident(1413);
4614 /* In case the given address is a non-canonical IPv6 address, canonicize
4615 it. The code works for both IPv4 and IPv6, as it happens. */
4617 size = host_aton(sender_host_address, x);
4618 sender_host_address = store_get(48); /* large enough for full IPv6 */
4619 (void)host_nmtoa(size, x, -1, sender_host_address, ':');
4621 /* Now set up for testing */
4623 host_build_sender_fullhost();
4627 sender_local = FALSE;
4628 sender_host_notsocket = TRUE;
4629 debug_file = stderr;
4630 debug_fd = fileno(debug_file);
4631 fprintf(stdout, "\n**** SMTP testing session as if from host %s\n"
4632 "**** but without any ident (RFC 1413) callback.\n"
4633 "**** This is not for real!\n\n",
4634 sender_host_address);
4636 if (verify_check_host(&hosts_connection_nolog) == OK)
4637 log_write_selector &= ~L_smtp_connection;
4638 log_write(L_smtp_connection, LOG_MAIN, "%s", smtp_get_connection_info());
4640 /* NOTE: We do *not* call smtp_log_no_mail() if smtp_start_session() fails,
4641 because a log line has already been written for all its failure exists
4642 (usually "connection refused: <reason>") and writing another one is
4643 unnecessary clutter. */
4645 if (smtp_start_session())
4647 reset_point = store_get(0);
4650 store_reset(reset_point);
4651 if (smtp_setup_msg() <= 0) break;
4652 if (!receive_msg(FALSE)) break;
4656 exim_exit(EXIT_SUCCESS);
4660 /* Arrange for message reception if recipients or SMTP were specified;
4661 otherwise complain unless a version print (-bV) happened or this is a filter
4662 verification test. In the former case, show the configuration file name. */
4664 if (recipients_arg >= argc && !extract_recipients && !smtp_input)
4666 if (version_printed)
4668 printf("Configuration file is %s\n", config_main_filename);
4669 return EXIT_SUCCESS;
4672 if (filter_test == FTEST_NONE)
4673 exim_usage(called_as);
4677 /* If mua_wrapper is set, Exim is being used to turn an MUA that submits on the
4678 standard input into an MUA that submits to a smarthost over TCP/IP. We know
4679 that we are not called from inetd, because that is rejected above. The
4680 following configuration settings are forced here:
4682 (1) Synchronous delivery (-odi)
4683 (2) Errors to stderr (-oep == -oeq)
4684 (3) No parallel remote delivery
4685 (4) Unprivileged delivery
4687 We don't force overall queueing options because there are several of them;
4688 instead, queueing is avoided below when mua_wrapper is set. However, we do need
4689 to override any SMTP queueing. */
4693 synchronous_delivery = TRUE;
4694 arg_error_handling = ERRORS_STDERR;
4695 remote_max_parallel = 1;
4696 deliver_drop_privilege = TRUE;
4698 queue_smtp_domains = NULL;
4702 /* Prepare to accept one or more new messages on the standard input. When a
4703 message has been read, its id is returned in message_id[]. If doing immediate
4704 delivery, we fork a delivery process for each received message, except for the
4705 last one, where we can save a process switch.
4707 It is only in non-smtp mode that error_handling is allowed to be changed from
4708 its default of ERRORS_SENDER by argument. (Idle thought: are any of the
4709 sendmail error modes other than -oem ever actually used? Later: yes.) */
4711 if (!smtp_input) error_handling = arg_error_handling;
4713 /* If this is an inetd call, ensure that stderr is closed to prevent panic
4714 logging being sent down the socket and make an identd call to get the
4719 (void)fclose(stderr);
4720 exim_nullstd(); /* Re-open to /dev/null */
4721 verify_get_ident(IDENT_PORT);
4722 host_build_sender_fullhost();
4723 set_process_info("handling incoming connection from %s via inetd",
4727 /* If the sender host address has been set, build sender_fullhost if it hasn't
4728 already been done (which it will have been for inetd). This caters for the
4729 case when it is forced by -oMa. However, we must flag that it isn't a socket,
4730 so that the test for IP options is skipped for -bs input. */
4732 if (sender_host_address != NULL && sender_fullhost == NULL)
4734 host_build_sender_fullhost();
4735 set_process_info("handling incoming connection from %s via -oMa",
4737 sender_host_notsocket = TRUE;
4740 /* Otherwise, set the sender host as unknown except for inetd calls. This
4741 prevents host checking in the case of -bs not from inetd and also for -bS. */
4743 else if (!is_inetd) sender_host_unknown = TRUE;
4745 /* If stdout does not exist, then dup stdin to stdout. This can happen
4746 if exim is started from inetd. In this case fd 0 will be set to the socket,
4747 but fd 1 will not be set. This also happens for passed SMTP channels. */
4749 if (fstat(1, &statbuf) < 0) (void)dup2(0, 1);
4751 /* Set up the incoming protocol name and the state of the program. Root is
4752 allowed to force received protocol via the -oMr option above. If we have come
4753 via inetd, the process info has already been set up. We don't set
4754 received_protocol here for smtp input, as it varies according to
4755 batch/HELO/EHLO/AUTH/TLS. */
4759 if (!is_inetd) set_process_info("accepting a local %sSMTP message from <%s>",
4760 smtp_batched_input? "batched " : "",
4761 (sender_address!= NULL)? sender_address : originator_login);
4765 if (received_protocol == NULL)
4766 received_protocol = string_sprintf("local%s", called_as);
4767 set_process_info("accepting a local non-SMTP message from <%s>",
4771 /* Initialize the session_local_queue-only flag (this will be ignored if
4772 mua_wrapper is set) */
4775 session_local_queue_only = queue_only;
4777 /* For non-SMTP and for batched SMTP input, check that there is enough space on
4778 the spool if so configured. On failure, we must not attempt to send an error
4779 message! (For interactive SMTP, the check happens at MAIL FROM and an SMTP
4780 error code is given.) */
4782 if ((!smtp_input || smtp_batched_input) && !receive_check_fs(0))
4784 fprintf(stderr, "exim: insufficient disk space\n");
4785 return EXIT_FAILURE;
4788 /* If this is smtp input of any kind, real or batched, handle the start of the
4791 NOTE: We do *not* call smtp_log_no_mail() if smtp_start_session() fails,
4792 because a log line has already been written for all its failure exists
4793 (usually "connection refused: <reason>") and writing another one is
4794 unnecessary clutter. */
4800 if (verify_check_host(&hosts_connection_nolog) == OK)
4801 log_write_selector &= ~L_smtp_connection;
4802 log_write(L_smtp_connection, LOG_MAIN, "%s", smtp_get_connection_info());
4803 if (!smtp_start_session())
4806 exim_exit(EXIT_SUCCESS);
4810 /* Otherwise, set up the input size limit here. */
4814 thismessage_size_limit = expand_string_integer(message_size_limit, TRUE);
4815 if (expand_string_message != NULL)
4817 if (thismessage_size_limit == -1)
4818 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to expand "
4819 "message_size_limit: %s", expand_string_message);
4821 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "invalid value for "
4822 "message_size_limit: %s", expand_string_message);
4826 /* Loop for several messages when reading SMTP input. If we fork any child
4827 processes, we don't want to wait for them unless synchronous delivery is
4828 requested, so set SIGCHLD to SIG_IGN in that case. This is not necessarily the
4829 same as SIG_DFL, despite the fact that documentation often lists the default as
4830 "ignore". This is a confusing area. This is what I know:
4832 At least on some systems (e.g. Solaris), just setting SIG_IGN causes child
4833 processes that complete simply to go away without ever becoming defunct. You
4834 can't then wait for them - but we don't want to wait for them in the
4835 non-synchronous delivery case. However, this behaviour of SIG_IGN doesn't
4836 happen for all OS (e.g. *BSD is different).
4838 But that's not the end of the story. Some (many? all?) systems have the
4839 SA_NOCLDWAIT option for sigaction(). This requests the behaviour that Solaris
4840 has by default, so it seems that the difference is merely one of default
4841 (compare restarting vs non-restarting signals).
4843 To cover all cases, Exim sets SIG_IGN with SA_NOCLDWAIT here if it can. If not,
4844 it just sets SIG_IGN. To be on the safe side it also calls waitpid() at the end
4845 of the loop below. Paranoia rules.
4847 February 2003: That's *still* not the end of the story. There are now versions
4848 of Linux (where SIG_IGN does work) that are picky. If, having set SIG_IGN, a
4849 process then calls waitpid(), a grumble is written to the system log, because
4850 this is logically inconsistent. In other words, it doesn't like the paranoia.
4851 As a consequenc of this, the waitpid() below is now excluded if we are sure
4852 that SIG_IGN works. */
4854 if (!synchronous_delivery)
4857 struct sigaction act;
4858 act.sa_handler = SIG_IGN;
4859 sigemptyset(&(act.sa_mask));
4860 act.sa_flags = SA_NOCLDWAIT;
4861 sigaction(SIGCHLD, &act, NULL);
4863 signal(SIGCHLD, SIG_IGN);
4867 /* Save the current store pool point, for resetting at the start of
4868 each message, and save the real sender address, if any. */
4870 reset_point = store_get(0);
4871 real_sender_address = sender_address;
4873 /* Loop to receive messages; receive_msg() returns TRUE if there are more
4874 messages to be read (SMTP input), or FALSE otherwise (not SMTP, or SMTP channel
4879 store_reset(reset_point);
4882 /* Handle the SMTP case; call smtp_setup_mst() to deal with the initial SMTP
4883 input and build the recipients list, before calling receive_msg() to read the
4884 message proper. Whatever sender address is given in the SMTP transaction is
4885 often ignored for local senders - we use the actual sender, which is normally
4886 either the underlying user running this process or a -f argument provided by
4887 a trusted caller. It is saved in real_sender_address. The test for whether to
4888 accept the SMTP sender is encapsulated in receive_check_set_sender(). */
4893 if ((rc = smtp_setup_msg()) > 0)
4895 if (real_sender_address != NULL &&
4896 !receive_check_set_sender(sender_address))
4898 sender_address = raw_sender = real_sender_address;
4899 sender_address_unrewritten = NULL;
4902 /* For batched SMTP, we have to run the acl_not_smtp_start ACL, since it
4903 isn't really SMTP, so no other ACL will run until the acl_not_smtp one at
4904 the very end. The result of the ACL is ignored (as for other non-SMTP
4905 messages). It is run for its potential side effects. */
4907 if (smtp_batched_input && acl_not_smtp_start != NULL)
4909 uschar *user_msg, *log_msg;
4910 enable_dollar_recipients = TRUE;
4911 (void)acl_check(ACL_WHERE_NOTSMTP_START, NULL, acl_not_smtp_start,
4912 &user_msg, &log_msg);
4913 enable_dollar_recipients = FALSE;
4916 /* Now get the data for the message */
4918 more = receive_msg(extract_recipients);
4919 if (message_id[0] == 0)
4922 smtp_log_no_mail(); /* Log no mail if configured */
4923 exim_exit(EXIT_FAILURE);
4928 smtp_log_no_mail(); /* Log no mail if configured */
4929 exim_exit((rc == 0)? EXIT_SUCCESS : EXIT_FAILURE);
4933 /* In the non-SMTP case, we have all the information from the command
4934 line, but must process it in case it is in the more general RFC822
4935 format, and in any case, to detect syntax errors. Also, it appears that
4936 the use of comma-separated lists as single arguments is common, so we
4937 had better support them. */
4943 int count = argc - recipients_arg;
4944 uschar **list = argv + recipients_arg;
4946 /* These options cannot be changed dynamically for non-SMTP messages */
4948 active_local_sender_retain = local_sender_retain;
4949 active_local_from_check = local_from_check;
4951 /* Save before any rewriting */
4953 raw_sender = string_copy(sender_address);
4955 /* Loop for each argument */
4957 for (i = 0; i < count; i++)
4959 int start, end, domain;
4961 uschar *s = list[i];
4963 /* Loop for each comma-separated address */
4967 BOOL finished = FALSE;
4969 uschar *ss = parse_find_address_end(s, FALSE);
4971 if (*ss == ',') *ss = 0; else finished = TRUE;
4973 /* Check max recipients - if -t was used, these aren't recipients */
4975 if (recipients_max > 0 && ++rcount > recipients_max &&
4976 !extract_recipients)
4978 if (error_handling == ERRORS_STDERR)
4980 fprintf(stderr, "exim: too many recipients\n");
4981 exim_exit(EXIT_FAILURE);
4986 moan_to_sender(ERRMESS_TOOMANYRECIP, NULL, NULL, stdin, TRUE)?
4987 errors_sender_rc : EXIT_FAILURE;
4992 parse_extract_address(s, &errmess, &start, &end, &domain, FALSE);
4994 if (domain == 0 && !allow_unqualified_recipient)
4997 errmess = US"unqualified recipient address not allowed";
5000 if (recipient == NULL)
5002 if (error_handling == ERRORS_STDERR)
5004 fprintf(stderr, "exim: bad recipient address \"%s\": %s\n",
5005 string_printing(list[i]), errmess);
5006 exim_exit(EXIT_FAILURE);
5012 eblock.text1 = string_printing(list[i]);
5013 eblock.text2 = errmess;
5015 moan_to_sender(ERRMESS_BADARGADDRESS, &eblock, NULL, stdin, TRUE)?
5016 errors_sender_rc : EXIT_FAILURE;
5020 receive_add_recipient(recipient, -1);
5023 while (*(++s) != 0 && (*s == ',' || isspace(*s)));
5027 /* Show the recipients when debugging */
5032 if (sender_address != NULL) debug_printf("Sender: %s\n", sender_address);
5033 if (recipients_list != NULL)
5035 debug_printf("Recipients:\n");
5036 for (i = 0; i < recipients_count; i++)
5037 debug_printf(" %s\n", recipients_list[i].address);
5041 /* Run the acl_not_smtp_start ACL if required. The result of the ACL is
5042 ignored; rejecting here would just add complication, and it can just as
5043 well be done later. Allow $recipients to be visible in the ACL. */
5045 if (acl_not_smtp_start != NULL)
5047 uschar *user_msg, *log_msg;
5048 enable_dollar_recipients = TRUE;
5049 (void)acl_check(ACL_WHERE_NOTSMTP_START, NULL, acl_not_smtp_start,
5050 &user_msg, &log_msg);
5051 enable_dollar_recipients = FALSE;
5054 /* Read the data for the message. If filter_test is not FTEST_NONE, this
5055 will just read the headers for the message, and not write anything onto the
5058 message_ended = END_NOTENDED;
5059 more = receive_msg(extract_recipients);
5061 /* more is always FALSE here (not SMTP message) when reading a message
5062 for real; when reading the headers of a message for filter testing,
5063 it is TRUE if the headers were terminated by '.' and FALSE otherwise. */
5065 if (message_id[0] == 0) exim_exit(EXIT_FAILURE);
5066 } /* Non-SMTP message reception */
5068 /* If this is a filter testing run, there are headers in store, but
5069 no message on the spool. Run the filtering code in testing mode, setting
5070 the domain to the qualify domain and the local part to the current user,
5071 unless they have been set by options. The prefix and suffix are left unset
5072 unless specified. The the return path is set to to the sender unless it has
5073 already been set from a return-path header in the message. */
5075 if (filter_test != FTEST_NONE)
5077 deliver_domain = (ftest_domain != NULL)?
5078 ftest_domain : qualify_domain_recipient;
5079 deliver_domain_orig = deliver_domain;
5080 deliver_localpart = (ftest_localpart != NULL)?
5081 ftest_localpart : originator_login;
5082 deliver_localpart_orig = deliver_localpart;
5083 deliver_localpart_prefix = ftest_prefix;
5084 deliver_localpart_suffix = ftest_suffix;
5085 deliver_home = originator_home;
5087 if (return_path == NULL)
5089 printf("Return-path copied from sender\n");
5090 return_path = string_copy(sender_address);
5094 printf("Return-path = %s\n", (return_path[0] == 0)? US"<>" : return_path);
5096 printf("Sender = %s\n", (sender_address[0] == 0)? US"<>" : sender_address);
5098 receive_add_recipient(
5099 string_sprintf("%s%s%s@%s",
5100 (ftest_prefix == NULL)? US"" : ftest_prefix,
5102 (ftest_suffix == NULL)? US"" : ftest_suffix,
5103 deliver_domain), -1);
5105 printf("Recipient = %s\n", recipients_list[0].address);
5106 if (ftest_prefix != NULL) printf("Prefix = %s\n", ftest_prefix);
5107 if (ftest_suffix != NULL) printf("Suffix = %s\n", ftest_suffix);
5109 (void)chdir("/"); /* Get away from wherever the user is running this from */
5111 /* Now we run either a system filter test, or a user filter test, or both.
5112 In the latter case, headers added by the system filter will persist and be
5113 available to the user filter. We need to copy the filter variables
5116 if ((filter_test & FTEST_SYSTEM) != 0)
5118 if (!filter_runtest(filter_sfd, filter_test_sfile, TRUE, more))
5119 exim_exit(EXIT_FAILURE);
5122 memcpy(filter_sn, filter_n, sizeof(filter_sn));
5124 if ((filter_test & FTEST_USER) != 0)
5126 if (!filter_runtest(filter_ufd, filter_test_ufile, FALSE, more))
5127 exim_exit(EXIT_FAILURE);
5130 exim_exit(EXIT_SUCCESS);
5133 /* Else act on the result of message reception. We should not get here unless
5134 message_id[0] is non-zero. If queue_only is set, session_local_queue_only
5135 will be TRUE. If it is not, check on the number of messages received in this
5138 if (!session_local_queue_only &&
5139 smtp_accept_queue_per_connection > 0 &&
5140 receive_messagecount > smtp_accept_queue_per_connection)
5142 session_local_queue_only = TRUE;
5143 queue_only_reason = 2;
5146 /* Initialize local_queue_only from session_local_queue_only. If it is false,
5147 and queue_only_load is set, check that the load average is below it. If it is
5148 not, set local_queue_only TRUE. If queue_only_load_latch is true (the
5149 default), we put the whole session into queue_only mode. It then remains this
5150 way for any subsequent messages on the same SMTP connection. This is a
5151 deliberate choice; even though the load average may fall, it doesn't seem
5152 right to deliver later messages on the same call when not delivering earlier
5153 ones. However, there are odd cases where this is not wanted, so this can be
5154 changed by setting queue_only_load_latch false. */
5156 local_queue_only = session_local_queue_only;
5157 if (!local_queue_only && queue_only_load >= 0)
5159 local_queue_only = (load_average = OS_GETLOADAVG()) > queue_only_load;
5160 if (local_queue_only)
5162 queue_only_reason = 3;
5163 if (queue_only_load_latch) session_local_queue_only = TRUE;
5167 /* If running as an MUA wrapper, all queueing options and freezing options
5171 local_queue_only = queue_only_policy = deliver_freeze = FALSE;
5173 /* Log the queueing here, when it will get a message id attached, but
5174 not if queue_only is set (case 0). Case 1 doesn't happen here (too many
5177 if (local_queue_only) switch(queue_only_reason)
5180 log_write(L_delay_delivery,
5181 LOG_MAIN, "no immediate delivery: more than %d messages "
5182 "received in one connection", smtp_accept_queue_per_connection);
5186 log_write(L_delay_delivery,
5187 LOG_MAIN, "no immediate delivery: load average %.2f",
5188 (double)load_average/1000.0);
5192 /* Else do the delivery unless the ACL or local_scan() called for queue only
5193 or froze the message. Always deliver in a separate process. A fork failure is
5194 not a disaster, as the delivery will eventually happen on a subsequent queue
5195 run. The search cache must be tidied before the fork, as the parent will
5196 do it before exiting. The child will trigger a lookup failure and
5197 thereby defer the delivery if it tries to use (for example) a cached ldap
5198 connection that the parent has called unbind on. */
5200 else if (!queue_only_policy && !deliver_freeze)
5205 if ((pid = fork()) == 0)
5208 close_unwanted(); /* Close unwanted file descriptors and TLS */
5209 exim_nullstd(); /* Ensure std{in,out,err} exist */
5211 /* Re-exec Exim if we need to regain privilege (note: in mua_wrapper
5212 mode, deliver_drop_privilege is forced TRUE). */
5214 if (geteuid() != root_uid && !deliver_drop_privilege && !unprivileged)
5216 (void)child_exec_exim(CEE_EXEC_EXIT, FALSE, NULL, FALSE, 2, US"-Mc",
5218 /* Control does not return here. */
5221 /* No need to re-exec */
5223 rc = deliver_message(message_id, FALSE, FALSE);
5225 _exit((!mua_wrapper || rc == DELIVER_MUA_SUCCEEDED)?
5226 EXIT_SUCCESS : EXIT_FAILURE);
5231 log_write(0, LOG_MAIN|LOG_PANIC, "failed to fork automatic delivery "
5232 "process: %s", strerror(errno));
5235 /* In the parent, wait if synchronous delivery is required. This will
5236 always be the case in MUA wrapper mode. */
5238 else if (synchronous_delivery)
5241 while (wait(&status) != pid);
5242 if ((status & 0x00ff) != 0)
5243 log_write(0, LOG_MAIN|LOG_PANIC,
5244 "process %d crashed with signal %d while delivering %s",
5245 (int)pid, status & 0x00ff, message_id);
5246 if (mua_wrapper && (status & 0xffff) != 0) exim_exit(EXIT_FAILURE);
5250 /* The loop will repeat if more is TRUE. If we do not know know that the OS
5251 automatically reaps children (see comments above the loop), clear away any
5252 finished subprocesses here, in case there are lots of messages coming in
5253 from the same source. */
5255 #ifndef SIG_IGN_WORKS
5256 while (waitpid(-1, NULL, WNOHANG) > 0);
5260 exim_exit(EXIT_SUCCESS); /* Never returns */
5261 return 0; /* To stop compiler warning */