1 /*************************************************
2 * Exim - an Internet mail transport agent *
3 *************************************************/
5 /* Copyright (c) University of Cambridge 1995 - 2012 */
6 /* See the file NOTICE for conditions of use and distribution. */
9 /* The main function: entry point, initialization, and high-level control.
10 Also a few functions that don't naturally fit elsewhere. */
15 extern void init_lookup_list(void);
19 /*************************************************
20 * Function interface to store functions *
21 *************************************************/
23 /* We need some real functions to pass to the PCRE regular expression library
24 for store allocation via Exim's store manager. The normal calls are actually
25 macros that pass over location information to make tracing easier. These
26 functions just interface to the standard macro calls. A good compiler will
27 optimize out the tail recursion and so not make them too expensive. There
28 are two sets of functions; one for use when we want to retain the compiled
29 regular expression for a long time; the other for short-term use. */
32 function_store_get(size_t size)
34 return store_get((int)size);
38 function_dummy_free(void *block) { block = block; }
41 function_store_malloc(size_t size)
43 return store_malloc((int)size);
47 function_store_free(void *block)
55 /*************************************************
56 * Enums for cmdline interface *
57 *************************************************/
59 enum commandline_info { CMDINFO_NONE=0,
60 CMDINFO_HELP, CMDINFO_SIEVE, CMDINFO_DSCP };
65 /*************************************************
66 * Compile regular expression and panic on fail *
67 *************************************************/
69 /* This function is called when failure to compile a regular expression leads
70 to a panic exit. In other cases, pcre_compile() is called directly. In many
71 cases where this function is used, the results of the compilation are to be
72 placed in long-lived store, so we temporarily reset the store management
73 functions that PCRE uses if the use_malloc flag is set.
76 pattern the pattern to compile
77 caseless TRUE if caseless matching is required
78 use_malloc TRUE if compile into malloc store
80 Returns: pointer to the compiled pattern
84 regex_must_compile(uschar *pattern, BOOL caseless, BOOL use_malloc)
87 int options = PCRE_COPT;
92 pcre_malloc = function_store_malloc;
93 pcre_free = function_store_free;
95 if (caseless) options |= PCRE_CASELESS;
96 yield = pcre_compile(CS pattern, options, (const char **)&error, &offset, NULL);
97 pcre_malloc = function_store_get;
98 pcre_free = function_dummy_free;
100 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "regular expression error: "
101 "%s at offset %d while compiling %s", error, offset, pattern);
108 /*************************************************
109 * Execute regular expression and set strings *
110 *************************************************/
112 /* This function runs a regular expression match, and sets up the pointers to
113 the matched substrings.
116 re the compiled expression
117 subject the subject string
118 options additional PCRE options
119 setup if < 0 do full setup
120 if >= 0 setup from setup+1 onwards,
121 excluding the full matched string
123 Returns: TRUE or FALSE
127 regex_match_and_setup(const pcre *re, uschar *subject, int options, int setup)
129 int ovector[3*(EXPAND_MAXN+1)];
130 int n = pcre_exec(re, NULL, CS subject, Ustrlen(subject), 0,
131 PCRE_EOPT | options, ovector, sizeof(ovector)/sizeof(int));
133 if (n == 0) n = EXPAND_MAXN + 1;
137 expand_nmax = (setup < 0)? 0 : setup + 1;
138 for (nn = (setup < 0)? 0 : 2; nn < n*2; nn += 2)
140 expand_nstring[expand_nmax] = subject + ovector[nn];
141 expand_nlength[expand_nmax++] = ovector[nn+1] - ovector[nn];
151 /*************************************************
152 * Set up processing details *
153 *************************************************/
155 /* Save a text string for dumping when SIGUSR1 is received.
156 Do checks for overruns.
158 Arguments: format and arguments, as for printf()
163 set_process_info(const char *format, ...)
167 sprintf(CS process_info, "%5d ", (int)getpid());
168 len = Ustrlen(process_info);
169 va_start(ap, format);
170 if (!string_vformat(process_info + len, PROCESS_INFO_SIZE - len - 2, format, ap))
171 Ustrcpy(process_info + len, "**** string overflowed buffer ****");
172 len = Ustrlen(process_info);
173 process_info[len+0] = '\n';
174 process_info[len+1] = '\0';
175 process_info_len = len + 1;
176 DEBUG(D_process_info) debug_printf("set_process_info: %s", process_info);
183 /*************************************************
184 * Handler for SIGUSR1 *
185 *************************************************/
187 /* SIGUSR1 causes any exim process to write to the process log details of
188 what it is currently doing. It will only be used if the OS is capable of
189 setting up a handler that causes automatic restarting of any system call
190 that is in progress at the time.
192 This function takes care to be signal-safe.
194 Argument: the signal number (SIGUSR1)
199 usr1_handler(int sig)
203 os_restarting_signal(sig, usr1_handler);
205 fd = Uopen(process_log_path, O_APPEND|O_WRONLY, LOG_MODE);
208 /* If we are already running as the Exim user, try to create it in the
209 current process (assuming spool_directory exists). Otherwise, if we are
210 root, do the creation in an exim:exim subprocess. */
212 int euid = geteuid();
213 if (euid == exim_uid)
214 fd = Uopen(process_log_path, O_CREAT|O_APPEND|O_WRONLY, LOG_MODE);
215 else if (euid == root_uid)
216 fd = log_create_as_exim(process_log_path);
219 /* If we are neither exim nor root, or if we failed to create the log file,
220 give up. There is not much useful we can do with errors, since we don't want
221 to disrupt whatever is going on outside the signal handler. */
225 {int dummy = write(fd, process_info, process_info_len); dummy = dummy; }
231 /*************************************************
233 *************************************************/
235 /* This handler is enabled most of the time that Exim is running. The handler
236 doesn't actually get used unless alarm() has been called to set a timer, to
237 place a time limit on a system call of some kind. When the handler is run, it
240 There are some other SIGALRM handlers that are used in special cases when more
241 than just a flag setting is required; for example, when reading a message's
242 input. These are normally set up in the code module that uses them, and the
243 SIGALRM handler is reset to this one afterwards.
245 Argument: the signal value (SIGALRM)
250 sigalrm_handler(int sig)
252 sig = sig; /* Keep picky compilers happy */
254 os_non_restarting_signal(SIGALRM, sigalrm_handler);
259 /*************************************************
260 * Sleep for a fractional time interval *
261 *************************************************/
263 /* This function is called by millisleep() and exim_wait_tick() to wait for a
264 period of time that may include a fraction of a second. The coding is somewhat
265 tedious. We do not expect setitimer() ever to fail, but if it does, the process
266 will wait for ever, so we panic in this instance. (There was a case of this
267 when a bug in a function that calls milliwait() caused it to pass invalid data.
268 That's when I added the check. :-)
270 Argument: an itimerval structure containing the interval
275 milliwait(struct itimerval *itval)
278 sigset_t old_sigmask;
279 (void)sigemptyset(&sigmask); /* Empty mask */
280 (void)sigaddset(&sigmask, SIGALRM); /* Add SIGALRM */
281 (void)sigprocmask(SIG_BLOCK, &sigmask, &old_sigmask); /* Block SIGALRM */
282 if (setitimer(ITIMER_REAL, itval, NULL) < 0) /* Start timer */
283 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
284 "setitimer() failed: %s", strerror(errno));
285 (void)sigfillset(&sigmask); /* All signals */
286 (void)sigdelset(&sigmask, SIGALRM); /* Remove SIGALRM */
287 (void)sigsuspend(&sigmask); /* Until SIGALRM */
288 (void)sigprocmask(SIG_SETMASK, &old_sigmask, NULL); /* Restore mask */
294 /*************************************************
295 * Millisecond sleep function *
296 *************************************************/
298 /* The basic sleep() function has a granularity of 1 second, which is too rough
299 in some cases - for example, when using an increasing delay to slow down
302 Argument: number of millseconds
309 struct itimerval itval;
310 itval.it_interval.tv_sec = 0;
311 itval.it_interval.tv_usec = 0;
312 itval.it_value.tv_sec = msec/1000;
313 itval.it_value.tv_usec = (msec % 1000) * 1000;
319 /*************************************************
320 * Compare microsecond times *
321 *************************************************/
328 Returns: -1, 0, or +1
332 exim_tvcmp(struct timeval *t1, struct timeval *t2)
334 if (t1->tv_sec > t2->tv_sec) return +1;
335 if (t1->tv_sec < t2->tv_sec) return -1;
336 if (t1->tv_usec > t2->tv_usec) return +1;
337 if (t1->tv_usec < t2->tv_usec) return -1;
344 /*************************************************
345 * Clock tick wait function *
346 *************************************************/
348 /* Exim uses a time + a pid to generate a unique identifier in two places: its
349 message IDs, and in file names for maildir deliveries. Because some OS now
350 re-use pids within the same second, sub-second times are now being used.
351 However, for absolute certaintly, we must ensure the clock has ticked before
352 allowing the relevant process to complete. At the time of implementation of
353 this code (February 2003), the speed of processors is such that the clock will
354 invariably have ticked already by the time a process has done its job. This
355 function prepares for the time when things are faster - and it also copes with
356 clocks that go backwards.
359 then_tv A timeval which was used to create uniqueness; its usec field
360 has been rounded down to the value of the resolution.
361 We want to be sure the current time is greater than this.
362 resolution The resolution that was used to divide the microseconds
363 (1 for maildir, larger for message ids)
369 exim_wait_tick(struct timeval *then_tv, int resolution)
371 struct timeval now_tv;
372 long int now_true_usec;
374 (void)gettimeofday(&now_tv, NULL);
375 now_true_usec = now_tv.tv_usec;
376 now_tv.tv_usec = (now_true_usec/resolution) * resolution;
378 if (exim_tvcmp(&now_tv, then_tv) <= 0)
380 struct itimerval itval;
381 itval.it_interval.tv_sec = 0;
382 itval.it_interval.tv_usec = 0;
383 itval.it_value.tv_sec = then_tv->tv_sec - now_tv.tv_sec;
384 itval.it_value.tv_usec = then_tv->tv_usec + resolution - now_true_usec;
386 /* We know that, overall, "now" is less than or equal to "then". Therefore, a
387 negative value for the microseconds is possible only in the case when "now"
388 is more than a second less than "then". That means that itval.it_value.tv_sec
389 is greater than zero. The following correction is therefore safe. */
391 if (itval.it_value.tv_usec < 0)
393 itval.it_value.tv_usec += 1000000;
394 itval.it_value.tv_sec -= 1;
397 DEBUG(D_transport|D_receive)
399 if (!running_in_test_harness)
401 debug_printf("tick check: %lu.%06lu %lu.%06lu\n",
402 then_tv->tv_sec, then_tv->tv_usec, now_tv.tv_sec, now_tv.tv_usec);
403 debug_printf("waiting %lu.%06lu\n", itval.it_value.tv_sec,
404 itval.it_value.tv_usec);
415 /*************************************************
416 * Call fopen() with umask 777 and adjust mode *
417 *************************************************/
419 /* Exim runs with umask(0) so that files created with open() have the mode that
420 is specified in the open() call. However, there are some files, typically in
421 the spool directory, that are created with fopen(). They end up world-writeable
422 if no precautions are taken. Although the spool directory is not accessible to
423 the world, this is an untidiness. So this is a wrapper function for fopen()
424 that sorts out the mode of the created file.
427 filename the file name
428 options the fopen() options
429 mode the required mode
431 Returns: the fopened FILE or NULL
435 modefopen(const uschar *filename, const char *options, mode_t mode)
437 mode_t saved_umask = umask(0777);
438 FILE *f = Ufopen(filename, options);
439 (void)umask(saved_umask);
440 if (f != NULL) (void)fchmod(fileno(f), mode);
447 /*************************************************
448 * Ensure stdin, stdout, and stderr exist *
449 *************************************************/
451 /* Some operating systems grumble if an exec() happens without a standard
452 input, output, and error (fds 0, 1, 2) being defined. The worry is that some
453 file will be opened and will use these fd values, and then some other bit of
454 code will assume, for example, that it can write error messages to stderr.
455 This function ensures that fds 0, 1, and 2 are open if they do not already
456 exist, by connecting them to /dev/null.
458 This function is also used to ensure that std{in,out,err} exist at all times,
459 so that if any library that Exim calls tries to use them, it doesn't crash.
471 for (i = 0; i <= 2; i++)
473 if (fstat(i, &statbuf) < 0 && errno == EBADF)
475 if (devnull < 0) devnull = open("/dev/null", O_RDWR);
476 if (devnull < 0) log_write(0, LOG_MAIN|LOG_PANIC_DIE, "%s",
477 string_open_failed(errno, "/dev/null"));
478 if (devnull != i) (void)dup2(devnull, i);
481 if (devnull > 2) (void)close(devnull);
487 /*************************************************
488 * Close unwanted file descriptors for delivery *
489 *************************************************/
491 /* This function is called from a new process that has been forked to deliver
492 an incoming message, either directly, or using exec.
494 We want any smtp input streams to be closed in this new process. However, it
495 has been observed that using fclose() here causes trouble. When reading in -bS
496 input, duplicate copies of messages have been seen. The files will be sharing a
497 file pointer with the parent process, and it seems that fclose() (at least on
498 some systems - I saw this on Solaris 2.5.1) messes with that file pointer, at
499 least sometimes. Hence we go for closing the underlying file descriptors.
501 If TLS is active, we want to shut down the TLS library, but without molesting
502 the parent's SSL connection.
504 For delivery of a non-SMTP message, we want to close stdin and stdout (and
505 stderr unless debugging) because the calling process might have set them up as
506 pipes and be waiting for them to close before it waits for the submission
507 process to terminate. If they aren't closed, they hold up the calling process
508 until the initial delivery process finishes, which is not what we want.
510 Exception: We do want it for synchronous delivery!
512 And notwithstanding all the above, if D_resolver is set, implying resolver
513 debugging, leave stdout open, because that's where the resolver writes its
516 When we close stderr (which implies we've also closed stdout), we also get rid
517 of any controlling terminal.
529 tls_close(FALSE, FALSE); /* Shut down the TLS library */
531 (void)close(fileno(smtp_in));
532 (void)close(fileno(smtp_out));
537 (void)close(0); /* stdin */
538 if ((debug_selector & D_resolver) == 0) (void)close(1); /* stdout */
539 if (debug_selector == 0) /* stderr */
541 if (!synchronous_delivery)
554 /*************************************************
556 *************************************************/
558 /* This function sets a new uid and gid permanently, optionally calling
559 initgroups() to set auxiliary groups. There are some special cases when running
560 Exim in unprivileged modes. In these situations the effective uid will not be
561 root; if we already have the right effective uid/gid, and don't need to
562 initialize any groups, leave things as they are.
567 igflag TRUE if initgroups() wanted
568 msg text to use in debugging output and failure log
570 Returns: nothing; bombs out on failure
574 exim_setugid(uid_t uid, gid_t gid, BOOL igflag, uschar *msg)
576 uid_t euid = geteuid();
577 gid_t egid = getegid();
579 if (euid == root_uid || euid != uid || egid != gid || igflag)
581 /* At least one OS returns +1 for initgroups failure, so just check for
586 struct passwd *pw = getpwuid(uid);
589 if (initgroups(pw->pw_name, gid) != 0)
590 log_write(0,LOG_MAIN|LOG_PANIC_DIE,"initgroups failed for uid=%ld: %s",
591 (long int)uid, strerror(errno));
593 else log_write(0, LOG_MAIN|LOG_PANIC_DIE, "cannot run initgroups(): "
594 "no passwd entry for uid=%ld", (long int)uid);
597 if (setgid(gid) < 0 || setuid(uid) < 0)
599 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "unable to set gid=%ld or uid=%ld "
600 "(euid=%ld): %s", (long int)gid, (long int)uid, (long int)euid, msg);
604 /* Debugging output included uid/gid and all groups */
608 int group_count, save_errno;
609 gid_t group_list[NGROUPS_MAX];
610 debug_printf("changed uid/gid: %s\n uid=%ld gid=%ld pid=%ld\n", msg,
611 (long int)geteuid(), (long int)getegid(), (long int)getpid());
612 group_count = getgroups(NGROUPS_MAX, group_list);
614 debug_printf(" auxiliary group list:");
618 for (i = 0; i < group_count; i++) debug_printf(" %d", (int)group_list[i]);
620 else if (group_count < 0)
621 debug_printf(" <error: %s>", strerror(save_errno));
622 else debug_printf(" <none>");
630 /*************************************************
632 *************************************************/
634 /* Exim exits via this function so that it always clears up any open
640 Returns: does not return
648 debug_printf(">>>>>>>>>>>>>>>> Exim pid=%d terminating with rc=%d "
649 ">>>>>>>>>>>>>>>>\n", (int)getpid(), rc);
656 /*************************************************
657 * Extract port from host address *
658 *************************************************/
660 /* Called to extract the port from the values given to -oMa and -oMi.
661 It also checks the syntax of the address, and terminates it before the
662 port data when a port is extracted.
665 address the address, with possible port on the end
667 Returns: the port, or zero if there isn't one
668 bombs out on a syntax error
672 check_port(uschar *address)
674 int port = host_address_extract_port(address);
675 if (string_is_ip_address(address, NULL) == 0)
677 fprintf(stderr, "exim abandoned: \"%s\" is not an IP address\n", address);
685 /*************************************************
686 * Test/verify an address *
687 *************************************************/
689 /* This function is called by the -bv and -bt code. It extracts a working
690 address from a full RFC 822 address. This isn't really necessary per se, but it
691 has the effect of collapsing source routes.
695 flags flag bits for verify_address()
696 exit_value to be set for failures
702 test_address(uschar *s, int flags, int *exit_value)
704 int start, end, domain;
705 uschar *parse_error = NULL;
706 uschar *address = parse_extract_address(s, &parse_error, &start, &end, &domain,
710 fprintf(stdout, "syntax error: %s\n", parse_error);
715 int rc = verify_address(deliver_make_addr(address,TRUE), stdout, flags, -1,
716 -1, -1, NULL, NULL, NULL);
717 if (rc == FAIL) *exit_value = 2;
718 else if (rc == DEFER && *exit_value == 0) *exit_value = 1;
724 /*************************************************
725 * Show supported features *
726 *************************************************/
728 /* This function is called for -bV/--version and for -d to output the optional
729 features of the current Exim binary.
731 Arguments: a FILE for printing
736 show_whats_supported(FILE *f)
740 #ifdef DB_VERSION_STRING
741 fprintf(f, "Berkeley DB: %s\n", DB_VERSION_STRING);
742 #elif defined(BTREEVERSION) && defined(HASHVERSION)
744 fprintf(f, "Probably Berkeley DB version 1.8x (native mode)\n");
746 fprintf(f, "Probably Berkeley DB version 1.8x (compatibility mode)\n");
748 #elif defined(_DBM_RDONLY) || defined(dbm_dirfno)
749 fprintf(f, "Probably ndbm\n");
750 #elif defined(USE_TDB)
751 fprintf(f, "Using tdb\n");
754 fprintf(f, "Probably GDBM (native mode)\n");
756 fprintf(f, "Probably GDBM (compatibility mode)\n");
760 fprintf(f, "Support for:");
761 #ifdef SUPPORT_CRYPTEQ
762 fprintf(f, " crypteq");
765 fprintf(f, " iconv()");
770 #ifdef HAVE_SETCLASSRESOURCES
771 fprintf(f, " use_setclassresources");
780 fprintf(f, " Expand_dlfunc");
782 #ifdef USE_TCP_WRAPPERS
783 fprintf(f, " TCPwrappers");
787 fprintf(f, " GnuTLS");
789 fprintf(f, " OpenSSL");
792 #ifdef SUPPORT_TRANSLATE_IP_ADDRESS
793 fprintf(f, " translate_ip_address");
795 #ifdef SUPPORT_MOVE_FROZEN_MESSAGES
796 fprintf(f, " move_frozen_messages");
798 #ifdef WITH_CONTENT_SCAN
799 fprintf(f, " Content_Scanning");
804 #ifdef WITH_OLD_DEMIME
805 fprintf(f, " Old_Demime");
807 #ifdef EXPERIMENTAL_SPF
808 fprintf(f, " Experimental_SPF");
810 #ifdef EXPERIMENTAL_SRS
811 fprintf(f, " Experimental_SRS");
813 #ifdef EXPERIMENTAL_BRIGHTMAIL
814 fprintf(f, " Experimental_Brightmail");
816 #ifdef EXPERIMENTAL_DCC
817 fprintf(f, " Experimental_DCC");
821 fprintf(f, "Lookups (built-in):");
822 #if defined(LOOKUP_LSEARCH) && LOOKUP_LSEARCH!=2
823 fprintf(f, " lsearch wildlsearch nwildlsearch iplsearch");
825 #if defined(LOOKUP_CDB) && LOOKUP_CDB!=2
828 #if defined(LOOKUP_DBM) && LOOKUP_DBM!=2
829 fprintf(f, " dbm dbmjz dbmnz");
831 #if defined(LOOKUP_DNSDB) && LOOKUP_DNSDB!=2
832 fprintf(f, " dnsdb");
834 #if defined(LOOKUP_DSEARCH) && LOOKUP_DSEARCH!=2
835 fprintf(f, " dsearch");
837 #if defined(LOOKUP_IBASE) && LOOKUP_IBASE!=2
838 fprintf(f, " ibase");
840 #if defined(LOOKUP_LDAP) && LOOKUP_LDAP!=2
841 fprintf(f, " ldap ldapdn ldapm");
843 #if defined(LOOKUP_MYSQL) && LOOKUP_MYSQL!=2
844 fprintf(f, " mysql");
846 #if defined(LOOKUP_NIS) && LOOKUP_NIS!=2
847 fprintf(f, " nis nis0");
849 #if defined(LOOKUP_NISPLUS) && LOOKUP_NISPLUS!=2
850 fprintf(f, " nisplus");
852 #if defined(LOOKUP_ORACLE) && LOOKUP_ORACLE!=2
853 fprintf(f, " oracle");
855 #if defined(LOOKUP_PASSWD) && LOOKUP_PASSWD!=2
856 fprintf(f, " passwd");
858 #if defined(LOOKUP_PGSQL) && LOOKUP_PGSQL!=2
859 fprintf(f, " pgsql");
861 #if defined(LOOKUP_SQLITE) && LOOKUP_SQLITE!=2
862 fprintf(f, " sqlite");
864 #if defined(LOOKUP_TESTDB) && LOOKUP_TESTDB!=2
865 fprintf(f, " testdb");
867 #if defined(LOOKUP_WHOSON) && LOOKUP_WHOSON!=2
868 fprintf(f, " whoson");
872 fprintf(f, "Authenticators:");
874 fprintf(f, " cram_md5");
876 #ifdef AUTH_CYRUS_SASL
877 fprintf(f, " cyrus_sasl");
880 fprintf(f, " dovecot");
883 fprintf(f, " gsasl");
885 #ifdef AUTH_HEIMDAL_GSSAPI
886 fprintf(f, " heimdal_gssapi");
888 #ifdef AUTH_PLAINTEXT
889 fprintf(f, " plaintext");
896 fprintf(f, "Routers:");
898 fprintf(f, " accept");
900 #ifdef ROUTER_DNSLOOKUP
901 fprintf(f, " dnslookup");
903 #ifdef ROUTER_IPLITERAL
904 fprintf(f, " ipliteral");
906 #ifdef ROUTER_IPLOOKUP
907 fprintf(f, " iplookup");
909 #ifdef ROUTER_MANUALROUTE
910 fprintf(f, " manualroute");
912 #ifdef ROUTER_QUERYPROGRAM
913 fprintf(f, " queryprogram");
915 #ifdef ROUTER_REDIRECT
916 fprintf(f, " redirect");
920 fprintf(f, "Transports:");
921 #ifdef TRANSPORT_APPENDFILE
922 fprintf(f, " appendfile");
923 #ifdef SUPPORT_MAILDIR
924 fprintf(f, "/maildir");
926 #ifdef SUPPORT_MAILSTORE
927 fprintf(f, "/mailstore");
933 #ifdef TRANSPORT_AUTOREPLY
934 fprintf(f, " autoreply");
936 #ifdef TRANSPORT_LMTP
939 #ifdef TRANSPORT_PIPE
942 #ifdef TRANSPORT_SMTP
947 if (fixed_never_users[0] > 0)
950 fprintf(f, "Fixed never_users: ");
951 for (i = 1; i <= (int)fixed_never_users[0] - 1; i++)
952 fprintf(f, "%d:", (unsigned int)fixed_never_users[i]);
953 fprintf(f, "%d\n", (unsigned int)fixed_never_users[i]);
956 fprintf(f, "Size of off_t: " SIZE_T_FMT "\n", sizeof(off_t));
958 /* Everything else is details which are only worth reporting when debugging.
959 Perhaps the tls_version_report should move into this too. */
964 /* clang defines __GNUC__ (at least, for me) so test for it first */
965 #if defined(__clang__)
966 fprintf(f, "Compiler: CLang [%s]\n", __clang_version__);
967 #elif defined(__GNUC__)
968 fprintf(f, "Compiler: GCC [%s]\n",
972 "? unknown version ?"
976 fprintf(f, "Compiler: <unknown>\n");
980 tls_version_report(f);
983 for (authi = auths_available; *authi->driver_name != '\0'; ++authi) {
984 if (authi->version_report) {
985 (*authi->version_report)(f);
989 /* PCRE_PRERELEASE is either defined and empty or a bare sequence of
990 characters; unless it's an ancient version of PCRE in which case it
992 #ifndef PCRE_PRERELEASE
993 #define PCRE_PRERELEASE
996 #define EXPAND_AND_QUOTE(X) QUOTE(X)
997 fprintf(f, "Library version: PCRE: Compile: %d.%d%s\n"
999 PCRE_MAJOR, PCRE_MINOR,
1000 EXPAND_AND_QUOTE(PCRE_PRERELEASE) "",
1003 #undef EXPAND_AND_QUOTE
1006 for (i = 0; i < lookup_list_count; i++)
1008 if (lookup_list[i]->version_report)
1009 lookup_list[i]->version_report(f);
1012 #ifdef WHITELIST_D_MACROS
1013 fprintf(f, "WHITELIST_D_MACROS: \"%s\"\n", WHITELIST_D_MACROS);
1015 fprintf(f, "WHITELIST_D_MACROS unset\n");
1017 #ifdef TRUSTED_CONFIG_LIST
1018 fprintf(f, "TRUSTED_CONFIG_LIST: \"%s\"\n", TRUSTED_CONFIG_LIST);
1020 fprintf(f, "TRUSTED_CONFIG_LIST unset\n");
1027 /*************************************************
1028 * Show auxiliary information about Exim *
1029 *************************************************/
1032 show_exim_information(enum commandline_info request, FILE *stream)
1039 fprintf(stream, "Oops, something went wrong.\n");
1043 "The -bI: flag takes a string indicating which information to provide.\n"
1044 "If the string is not recognised, you'll get this help (on stderr).\n"
1046 " exim -bI:help this information\n"
1047 " exim -bI:dscp dscp value keywords known\n"
1048 " exim -bI:sieve list of supported sieve extensions, one per line.\n"
1052 for (pp = exim_sieve_extension_list; *pp; ++pp)
1053 fprintf(stream, "%s\n", *pp);
1056 dscp_list_to_stream(stream);
1062 /*************************************************
1063 * Quote a local part *
1064 *************************************************/
1066 /* This function is used when a sender address or a From: or Sender: header
1067 line is being created from the caller's login, or from an authenticated_id. It
1068 applies appropriate quoting rules for a local part.
1070 Argument: the local part
1071 Returns: the local part, quoted if necessary
1075 local_part_quote(uschar *lpart)
1077 BOOL needs_quote = FALSE;
1082 for (t = lpart; !needs_quote && *t != 0; t++)
1084 needs_quote = !isalnum(*t) && strchr("!#$%&'*+-/=?^_`{|}~", *t) == NULL &&
1085 (*t != '.' || t == lpart || t[1] == 0);
1088 if (!needs_quote) return lpart;
1091 yield = string_cat(NULL, &size, &ptr, US"\"", 1);
1095 uschar *nq = US Ustrpbrk(lpart, "\\\"");
1098 yield = string_cat(yield, &size, &ptr, lpart, Ustrlen(lpart));
1101 yield = string_cat(yield, &size, &ptr, lpart, nq - lpart);
1102 yield = string_cat(yield, &size, &ptr, US"\\", 1);
1103 yield = string_cat(yield, &size, &ptr, nq, 1);
1107 yield = string_cat(yield, &size, &ptr, US"\"", 1);
1115 /*************************************************
1116 * Load readline() functions *
1117 *************************************************/
1119 /* This function is called from testing executions that read data from stdin,
1120 but only when running as the calling user. Currently, only -be does this. The
1121 function loads the readline() function library and passes back the functions.
1122 On some systems, it needs the curses library, so load that too, but try without
1123 it if loading fails. All this functionality has to be requested at build time.
1126 fn_readline_ptr pointer to where to put the readline pointer
1127 fn_addhist_ptr pointer to where to put the addhistory function
1129 Returns: the dlopen handle or NULL on failure
1133 set_readline(char * (**fn_readline_ptr)(const char *),
1134 void (**fn_addhist_ptr)(const char *))
1137 void *dlhandle_curses = dlopen("libcurses." DYNLIB_FN_EXT, RTLD_GLOBAL|RTLD_LAZY);
1139 dlhandle = dlopen("libreadline." DYNLIB_FN_EXT, RTLD_GLOBAL|RTLD_NOW);
1140 if (dlhandle_curses != NULL) dlclose(dlhandle_curses);
1142 if (dlhandle != NULL)
1144 /* Checked manual pages; at least in GNU Readline 6.1, the prototypes are:
1145 * char * readline (const char *prompt);
1146 * void add_history (const char *string);
1148 *fn_readline_ptr = (char *(*)(const char*))dlsym(dlhandle, "readline");
1149 *fn_addhist_ptr = (void(*)(const char*))dlsym(dlhandle, "add_history");
1153 DEBUG(D_any) debug_printf("failed to load readline: %s\n", dlerror());
1162 /*************************************************
1163 * Get a line from stdin for testing things *
1164 *************************************************/
1166 /* This function is called when running tests that can take a number of lines
1167 of input (for example, -be and -bt). It handles continuations and trailing
1168 spaces. And prompting and a blank line output on eof. If readline() is in use,
1169 the arguments are non-NULL and provide the relevant functions.
1172 fn_readline readline function or NULL
1173 fn_addhist addhist function or NULL
1175 Returns: pointer to dynamic memory, or NULL at end of file
1179 get_stdinput(char *(*fn_readline)(const char *), void(*fn_addhist)(const char *))
1184 uschar *yield = NULL;
1186 if (fn_readline == NULL) { printf("> "); fflush(stdout); }
1190 uschar buffer[1024];
1194 char *readline_line = NULL;
1195 if (fn_readline != NULL)
1197 if ((readline_line = fn_readline((i > 0)? "":"> ")) == NULL) break;
1198 if (*readline_line != 0 && fn_addhist != NULL) fn_addhist(readline_line);
1199 p = US readline_line;
1204 /* readline() not in use */
1207 if (Ufgets(buffer, sizeof(buffer), stdin) == NULL) break;
1211 /* Handle the line */
1213 ss = p + (int)Ustrlen(p);
1214 while (ss > p && isspace(ss[-1])) ss--;
1218 while (p < ss && isspace(*p)) p++; /* leading space after cont */
1221 yield = string_cat(yield, &size, &ptr, p, ss - p);
1224 if (fn_readline != NULL) free(readline_line);
1227 if (ss == p || yield[ptr-1] != '\\')
1235 if (yield == NULL) printf("\n");
1241 /*************************************************
1242 * Output usage information for the program *
1243 *************************************************/
1245 /* This function is called when there are no recipients
1246 or a specific --help argument was added.
1249 progname information on what name we were called by
1251 Returns: DOES NOT RETURN
1255 exim_usage(uschar *progname)
1258 /* Handle specific program invocation varients */
1259 if (Ustrcmp(progname, US"-mailq") == 0)
1262 "mailq - list the contents of the mail queue\n\n"
1263 "For a list of options, see the Exim documentation.\n");
1267 /* Generic usage - we output this whatever happens */
1269 "Exim is a Mail Transfer Agent. It is normally called by Mail User Agents,\n"
1270 "not directly from a shell command line. Options and/or arguments control\n"
1271 "what it does when called. For a list of options, see the Exim documentation.\n");
1278 /*************************************************
1279 * Validate that the macros given are okay *
1280 *************************************************/
1282 /* Typically, Exim will drop privileges if macros are supplied. In some
1283 cases, we want to not do so.
1285 Arguments: none (macros is a global)
1286 Returns: true if trusted, false otherwise
1290 macros_trusted(void)
1292 #ifdef WHITELIST_D_MACROS
1294 uschar *whitelisted, *end, *p, **whites, **w;
1295 int white_count, i, n;
1297 BOOL prev_char_item, found;
1302 #ifndef WHITELIST_D_MACROS
1306 /* We only trust -D overrides for some invoking users:
1307 root, the exim run-time user, the optional config owner user.
1308 I don't know why config-owner would be needed, but since they can own the
1309 config files anyway, there's no security risk to letting them override -D. */
1310 if ( ! ((real_uid == root_uid)
1311 || (real_uid == exim_uid)
1312 #ifdef CONFIGURE_OWNER
1313 || (real_uid == config_uid)
1317 debug_printf("macros_trusted rejecting macros for uid %d\n", (int) real_uid);
1321 /* Get a list of macros which are whitelisted */
1322 whitelisted = string_copy_malloc(US WHITELIST_D_MACROS);
1323 prev_char_item = FALSE;
1325 for (p = whitelisted; *p != '\0'; ++p)
1327 if (*p == ':' || isspace(*p))
1332 prev_char_item = FALSE;
1335 if (!prev_char_item)
1336 prev_char_item = TRUE;
1343 whites = store_malloc(sizeof(uschar *) * (white_count+1));
1344 for (p = whitelisted, i = 0; (p != end) && (i < white_count); ++p)
1349 if (i == white_count)
1351 while (*p != '\0' && p < end)
1357 /* The list of macros should be very short. Accept the N*M complexity. */
1358 for (m = macros; m != NULL; m = m->next)
1361 for (w = whites; *w; ++w)
1362 if (Ustrcmp(*w, m->name) == 0)
1369 if (m->replacement == NULL)
1371 len = Ustrlen(m->replacement);
1374 n = pcre_exec(regex_whitelisted_macro, NULL, CS m->replacement, len,
1375 0, PCRE_EOPT, NULL, 0);
1378 if (n != PCRE_ERROR_NOMATCH)
1379 debug_printf("macros_trusted checking %s returned %d\n", m->name, n);
1383 DEBUG(D_any) debug_printf("macros_trusted overridden to true by whitelisting\n");
1389 /*************************************************
1390 * Entry point and high-level code *
1391 *************************************************/
1393 /* Entry point for the Exim mailer. Analyse the arguments and arrange to take
1394 the appropriate action. All the necessary functions are present in the one
1395 binary. I originally thought one should split it up, but it turns out that so
1396 much of the apparatus is needed in each chunk that one might as well just have
1397 it all available all the time, which then makes the coding easier as well.
1400 argc count of entries in argv
1401 argv argument strings, with argv[0] being the program name
1403 Returns: EXIT_SUCCESS if terminated successfully
1404 EXIT_FAILURE otherwise, except when a message has been sent
1405 to the sender, and -oee was given
1409 main(int argc, char **cargv)
1411 uschar **argv = USS cargv;
1412 int arg_receive_timeout = -1;
1413 int arg_smtp_receive_timeout = -1;
1414 int arg_error_handling = error_handling;
1415 int filter_sfd = -1;
1416 int filter_ufd = -1;
1419 int list_queue_option = 0;
1421 int msg_action_arg = -1;
1422 int namelen = (argv[0] == NULL)? 0 : Ustrlen(argv[0]);
1423 int queue_only_reason = 0;
1425 int perl_start_option = 0;
1427 int recipients_arg = argc;
1428 int sender_address_domain = 0;
1429 int test_retry_arg = -1;
1430 int test_rewrite_arg = -1;
1431 BOOL arg_queue_only = FALSE;
1432 BOOL bi_option = FALSE;
1433 BOOL checking = FALSE;
1434 BOOL count_queue = FALSE;
1435 BOOL expansion_test = FALSE;
1436 BOOL extract_recipients = FALSE;
1437 BOOL flag_G = FALSE;
1438 BOOL flag_n = FALSE;
1439 BOOL forced_delivery = FALSE;
1440 BOOL f_end_dot = FALSE;
1441 BOOL deliver_give_up = FALSE;
1442 BOOL list_queue = FALSE;
1443 BOOL list_options = FALSE;
1444 BOOL local_queue_only;
1446 BOOL one_msg_action = FALSE;
1447 BOOL queue_only_set = FALSE;
1448 BOOL receiving_message = TRUE;
1449 BOOL sender_ident_set = FALSE;
1450 BOOL session_local_queue_only;
1452 BOOL removed_privilege = FALSE;
1453 BOOL usage_wanted = FALSE;
1454 BOOL verify_address_mode = FALSE;
1455 BOOL verify_as_sender = FALSE;
1456 BOOL version_printed = FALSE;
1457 uschar *alias_arg = NULL;
1458 uschar *called_as = US"";
1459 uschar *cmdline_syslog_name = NULL;
1460 uschar *start_queue_run_id = NULL;
1461 uschar *stop_queue_run_id = NULL;
1462 uschar *expansion_test_message = NULL;
1463 uschar *ftest_domain = NULL;
1464 uschar *ftest_localpart = NULL;
1465 uschar *ftest_prefix = NULL;
1466 uschar *ftest_suffix = NULL;
1467 uschar *malware_test_file = NULL;
1468 uschar *real_sender_address;
1469 uschar *originator_home = US"/";
1474 struct stat statbuf;
1475 pid_t passed_qr_pid = (pid_t)0;
1476 int passed_qr_pipe = -1;
1477 gid_t group_list[NGROUPS_MAX];
1479 /* For the -bI: flag */
1480 enum commandline_info info_flag = CMDINFO_NONE;
1481 BOOL info_stdout = FALSE;
1483 /* Possible options for -R and -S */
1485 static uschar *rsopts[] = { US"f", US"ff", US"r", US"rf", US"rff" };
1487 /* Need to define this in case we need to change the environment in order
1488 to get rid of a bogus time zone. We have to make it char rather than uschar
1489 because some OS define it in /usr/include/unistd.h. */
1491 extern char **environ;
1493 /* If the Exim user and/or group and/or the configuration file owner/group were
1494 defined by ref:name at build time, we must now find the actual uid/gid values.
1495 This is a feature to make the lives of binary distributors easier. */
1497 #ifdef EXIM_USERNAME
1498 if (route_finduser(US EXIM_USERNAME, &pw, &exim_uid))
1502 fprintf(stderr, "exim: refusing to run with uid 0 for \"%s\"\n",
1506 /* If ref:name uses a number as the name, route_finduser() returns
1507 TRUE with exim_uid set and pw coerced to NULL. */
1509 exim_gid = pw->pw_gid;
1510 #ifndef EXIM_GROUPNAME
1514 "exim: ref:name should specify a usercode, not a group.\n"
1515 "exim: can't let you get away with it unless you also specify a group.\n");
1522 fprintf(stderr, "exim: failed to find uid for user name \"%s\"\n",
1528 #ifdef EXIM_GROUPNAME
1529 if (!route_findgroup(US EXIM_GROUPNAME, &exim_gid))
1531 fprintf(stderr, "exim: failed to find gid for group name \"%s\"\n",
1537 #ifdef CONFIGURE_OWNERNAME
1538 if (!route_finduser(US CONFIGURE_OWNERNAME, NULL, &config_uid))
1540 fprintf(stderr, "exim: failed to find uid for user name \"%s\"\n",
1541 CONFIGURE_OWNERNAME);
1546 /* We default the system_filter_user to be the Exim run-time user, as a
1547 sane non-root value. */
1548 system_filter_uid = exim_uid;
1550 #ifdef CONFIGURE_GROUPNAME
1551 if (!route_findgroup(US CONFIGURE_GROUPNAME, &config_gid))
1553 fprintf(stderr, "exim: failed to find gid for group name \"%s\"\n",
1554 CONFIGURE_GROUPNAME);
1559 /* In the Cygwin environment, some initialization needs doing. It is fudged
1560 in by means of this macro. */
1566 /* Check a field which is patched when we are running Exim within its
1567 testing harness; do a fast initial check, and then the whole thing. */
1569 running_in_test_harness =
1570 *running_status == '<' && Ustrcmp(running_status, "<<<testing>>>") == 0;
1572 /* The C standard says that the equivalent of setlocale(LC_ALL, "C") is obeyed
1573 at the start of a program; however, it seems that some environments do not
1574 follow this. A "strange" locale can affect the formatting of timestamps, so we
1577 setlocale(LC_ALL, "C");
1579 /* Set up the default handler for timing using alarm(). */
1581 os_non_restarting_signal(SIGALRM, sigalrm_handler);
1583 /* Ensure we have a buffer for constructing log entries. Use malloc directly,
1584 because store_malloc writes a log entry on failure. */
1586 log_buffer = (uschar *)malloc(LOG_BUFFER_SIZE);
1587 if (log_buffer == NULL)
1589 fprintf(stderr, "exim: failed to get store for log buffer\n");
1593 /* Set log_stderr to stderr, provided that stderr exists. This gets reset to
1594 NULL when the daemon is run and the file is closed. We have to use this
1595 indirection, because some systems don't allow writing to the variable "stderr".
1598 if (fstat(fileno(stderr), &statbuf) >= 0) log_stderr = stderr;
1600 /* Arrange for the PCRE regex library to use our store functions. Note that
1601 the normal calls are actually macros that add additional arguments for
1602 debugging purposes so we have to assign specially constructed functions here.
1603 The default is to use store in the stacking pool, but this is overridden in the
1604 regex_must_compile() function. */
1606 pcre_malloc = function_store_get;
1607 pcre_free = function_dummy_free;
1609 /* Ensure there is a big buffer for temporary use in several places. It is put
1610 in malloc store so that it can be freed for enlargement if necessary. */
1612 big_buffer = store_malloc(big_buffer_size);
1614 /* Set up the handler for the data request signal, and set the initial
1615 descriptive text. */
1617 set_process_info("initializing");
1618 os_restarting_signal(SIGUSR1, usr1_handler);
1620 /* SIGHUP is used to get the daemon to reconfigure. It gets set as appropriate
1621 in the daemon code. For the rest of Exim's uses, we ignore it. */
1623 signal(SIGHUP, SIG_IGN);
1625 /* We don't want to die on pipe errors as the code is written to handle
1626 the write error instead. */
1628 signal(SIGPIPE, SIG_IGN);
1630 /* Under some circumstance on some OS, Exim can get called with SIGCHLD
1631 set to SIG_IGN. This causes subprocesses that complete before the parent
1632 process waits for them not to hang around, so when Exim calls wait(), nothing
1633 is there. The wait() code has been made robust against this, but let's ensure
1634 that SIGCHLD is set to SIG_DFL, because it's tidier to wait and get a process
1635 ending status. We use sigaction rather than plain signal() on those OS where
1636 SA_NOCLDWAIT exists, because we want to be sure it is turned off. (There was a
1637 problem on AIX with this.) */
1641 struct sigaction act;
1642 act.sa_handler = SIG_DFL;
1643 sigemptyset(&(act.sa_mask));
1645 sigaction(SIGCHLD, &act, NULL);
1648 signal(SIGCHLD, SIG_DFL);
1651 /* Save the arguments for use if we re-exec exim as a daemon after receiving
1656 /* Set up the version number. Set up the leading 'E' for the external form of
1657 message ids, set the pointer to the internal form, and initialize it to
1658 indicate no message being processed. */
1661 message_id_option[0] = '-';
1662 message_id_external = message_id_option + 1;
1663 message_id_external[0] = 'E';
1664 message_id = message_id_external + 1;
1667 /* Set the umask to zero so that any files Exim creates using open() are
1668 created with the modes that it specifies. NOTE: Files created with fopen() have
1669 a problem, which was not recognized till rather late (February 2006). With this
1670 umask, such files will be world writeable. (They are all content scanning files
1671 in the spool directory, which isn't world-accessible, so this is not a
1672 disaster, but it's untidy.) I don't want to change this overall setting,
1673 however, because it will interact badly with the open() calls. Instead, there's
1674 now a function called modefopen() that fiddles with the umask while calling
1679 /* Precompile the regular expression for matching a message id. Keep this in
1680 step with the code that generates ids in the accept.c module. We need to do
1681 this here, because the -M options check their arguments for syntactic validity
1682 using mac_ismsgid, which uses this. */
1685 regex_must_compile(US"^(?:[^\\W_]{6}-){2}[^\\W_]{2}$", FALSE, TRUE);
1687 /* Precompile the regular expression that is used for matching an SMTP error
1688 code, possibly extended, at the start of an error message. Note that the
1689 terminating whitespace character is included. */
1692 regex_must_compile(US"^\\d\\d\\d\\s(?:\\d\\.\\d\\d?\\d?\\.\\d\\d?\\d?\\s)?",
1695 #ifdef WHITELIST_D_MACROS
1696 /* Precompile the regular expression used to filter the content of macros
1697 given to -D for permissibility. */
1699 regex_whitelisted_macro =
1700 regex_must_compile(US"^[A-Za-z0-9_/.-]*$", FALSE, TRUE);
1704 /* If the program is called as "mailq" treat it as equivalent to "exim -bp";
1705 this seems to be a generally accepted convention, since one finds symbolic
1706 links called "mailq" in standard OS configurations. */
1708 if ((namelen == 5 && Ustrcmp(argv[0], "mailq") == 0) ||
1709 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/mailq", 6) == 0))
1712 receiving_message = FALSE;
1713 called_as = US"-mailq";
1716 /* If the program is called as "rmail" treat it as equivalent to
1717 "exim -i -oee", thus allowing UUCP messages to be input using non-SMTP mode,
1718 i.e. preventing a single dot on a line from terminating the message, and
1719 returning with zero return code, even in cases of error (provided an error
1720 message has been sent). */
1722 if ((namelen == 5 && Ustrcmp(argv[0], "rmail") == 0) ||
1723 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/rmail", 6) == 0))
1726 called_as = US"-rmail";
1727 errors_sender_rc = EXIT_SUCCESS;
1730 /* If the program is called as "rsmtp" treat it as equivalent to "exim -bS";
1731 this is a smail convention. */
1733 if ((namelen == 5 && Ustrcmp(argv[0], "rsmtp") == 0) ||
1734 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/rsmtp", 6) == 0))
1736 smtp_input = smtp_batched_input = TRUE;
1737 called_as = US"-rsmtp";
1740 /* If the program is called as "runq" treat it as equivalent to "exim -q";
1741 this is a smail convention. */
1743 if ((namelen == 4 && Ustrcmp(argv[0], "runq") == 0) ||
1744 (namelen > 4 && Ustrncmp(argv[0] + namelen - 5, "/runq", 5) == 0))
1747 receiving_message = FALSE;
1748 called_as = US"-runq";
1751 /* If the program is called as "newaliases" treat it as equivalent to
1752 "exim -bi"; this is a sendmail convention. */
1754 if ((namelen == 10 && Ustrcmp(argv[0], "newaliases") == 0) ||
1755 (namelen > 10 && Ustrncmp(argv[0] + namelen - 11, "/newaliases", 11) == 0))
1758 receiving_message = FALSE;
1759 called_as = US"-newaliases";
1762 /* Save the original effective uid for a couple of uses later. It should
1763 normally be root, but in some esoteric environments it may not be. */
1765 original_euid = geteuid();
1767 /* Get the real uid and gid. If the caller is root, force the effective uid/gid
1768 to be the same as the real ones. This makes a difference only if Exim is setuid
1769 (or setgid) to something other than root, which could be the case in some
1770 special configurations. */
1772 real_uid = getuid();
1773 real_gid = getgid();
1775 if (real_uid == root_uid)
1777 rv = setgid(real_gid);
1780 fprintf(stderr, "exim: setgid(%ld) failed: %s\n",
1781 (long int)real_gid, strerror(errno));
1784 rv = setuid(real_uid);
1787 fprintf(stderr, "exim: setuid(%ld) failed: %s\n",
1788 (long int)real_uid, strerror(errno));
1793 /* If neither the original real uid nor the original euid was root, Exim is
1794 running in an unprivileged state. */
1796 unprivileged = (real_uid != root_uid && original_euid != root_uid);
1798 /* Scan the program's arguments. Some can be dealt with right away; others are
1799 simply recorded for checking and handling afterwards. Do a high-level switch
1800 on the second character (the one after '-'), to save some effort. */
1802 for (i = 1; i < argc; i++)
1804 BOOL badarg = FALSE;
1805 uschar *arg = argv[i];
1809 /* An argument not starting with '-' is the start of a recipients list;
1810 break out of the options-scanning loop. */
1818 /* An option consistion of -- terminates the options */
1820 if (Ustrcmp(arg, "--") == 0)
1822 recipients_arg = i + 1;
1826 /* Handle flagged options */
1828 switchchar = arg[1];
1831 /* Make all -ex options synonymous with -oex arguments, since that
1832 is assumed by various callers. Also make -qR options synonymous with -R
1833 options, as that seems to be required as well. Allow for -qqR too, and
1834 the same for -S options. */
1836 if (Ustrncmp(arg+1, "oe", 2) == 0 ||
1837 Ustrncmp(arg+1, "qR", 2) == 0 ||
1838 Ustrncmp(arg+1, "qS", 2) == 0)
1840 switchchar = arg[2];
1843 else if (Ustrncmp(arg+1, "qqR", 3) == 0 || Ustrncmp(arg+1, "qqS", 3) == 0)
1845 switchchar = arg[3];
1847 queue_2stage = TRUE;
1850 /* Make -r synonymous with -f, since it is a documented alias */
1852 else if (arg[1] == 'r') switchchar = 'f';
1854 /* Make -ov synonymous with -v */
1856 else if (Ustrcmp(arg, "-ov") == 0)
1862 /* deal with --option_aliases */
1863 else if (switchchar == '-')
1865 if (Ustrcmp(argrest, "help") == 0)
1867 usage_wanted = TRUE;
1870 else if (Ustrcmp(argrest, "version") == 0)
1877 /* High-level switch on active initial letter */
1882 /* sendmail uses -Ac and -Am to control which .cf file is used;
1885 if (*argrest == '\0') { badarg = TRUE; break; }
1888 BOOL ignore = FALSE;
1893 if (*(argrest + 1) == '\0')
1897 if (!ignore) { badarg = TRUE; break; }
1901 /* -Btype is a sendmail option for 7bit/8bit setting. Exim is 8-bit clean
1902 so has no need of it. */
1905 if (*argrest == 0) i++; /* Skip over the type */
1910 receiving_message = FALSE; /* Reset TRUE for -bm, -bS, -bs below */
1912 /* -bd: Run in daemon mode, awaiting SMTP connections.
1913 -bdf: Ditto, but in the foreground.
1916 if (*argrest == 'd')
1918 daemon_listen = TRUE;
1919 if (*(++argrest) == 'f') background_daemon = FALSE;
1920 else if (*argrest != 0) { badarg = TRUE; break; }
1923 /* -be: Run in expansion test mode
1924 -bem: Ditto, but read a message from a file first
1927 else if (*argrest == 'e')
1929 expansion_test = checking = TRUE;
1930 if (argrest[1] == 'm')
1932 if (++i >= argc) { badarg = TRUE; break; }
1933 expansion_test_message = argv[i];
1936 if (argrest[1] != 0) { badarg = TRUE; break; }
1939 /* -bF: Run system filter test */
1941 else if (*argrest == 'F')
1943 filter_test |= FTEST_SYSTEM;
1944 if (*(++argrest) != 0) { badarg = TRUE; break; }
1945 if (++i < argc) filter_test_sfile = argv[i]; else
1947 fprintf(stderr, "exim: file name expected after %s\n", argv[i-1]);
1952 /* -bf: Run user filter test
1953 -bfd: Set domain for filter testing
1954 -bfl: Set local part for filter testing
1955 -bfp: Set prefix for filter testing
1956 -bfs: Set suffix for filter testing
1959 else if (*argrest == 'f')
1961 if (*(++argrest) == 0)
1963 filter_test |= FTEST_USER;
1964 if (++i < argc) filter_test_ufile = argv[i]; else
1966 fprintf(stderr, "exim: file name expected after %s\n", argv[i-1]);
1974 fprintf(stderr, "exim: string expected after %s\n", arg);
1977 if (Ustrcmp(argrest, "d") == 0) ftest_domain = argv[i];
1978 else if (Ustrcmp(argrest, "l") == 0) ftest_localpart = argv[i];
1979 else if (Ustrcmp(argrest, "p") == 0) ftest_prefix = argv[i];
1980 else if (Ustrcmp(argrest, "s") == 0) ftest_suffix = argv[i];
1981 else { badarg = TRUE; break; }
1985 /* -bh: Host checking - an IP address must follow. */
1987 else if (Ustrcmp(argrest, "h") == 0 || Ustrcmp(argrest, "hc") == 0)
1989 if (++i >= argc) { badarg = TRUE; break; }
1990 sender_host_address = argv[i];
1991 host_checking = checking = log_testing_mode = TRUE;
1992 host_checking_callout = argrest[1] == 'c';
1995 /* -bi: This option is used by sendmail to initialize *the* alias file,
1996 though it has the -oA option to specify a different file. Exim has no
1997 concept of *the* alias file, but since Sun's YP make script calls
1998 sendmail this way, some support must be provided. */
2000 else if (Ustrcmp(argrest, "i") == 0) bi_option = TRUE;
2002 /* -bI: provide information, of the type to follow after a colon.
2003 This is an Exim flag. */
2005 else if (argrest[0] == 'I' && Ustrlen(argrest) >= 2 && argrest[1] == ':')
2007 uschar *p = &argrest[2];
2008 info_flag = CMDINFO_HELP;
2011 if (strcmpic(p, CUS"sieve") == 0)
2013 info_flag = CMDINFO_SIEVE;
2016 else if (strcmpic(p, CUS"dscp") == 0)
2018 info_flag = CMDINFO_DSCP;
2021 else if (strcmpic(p, CUS"help") == 0)
2028 /* -bm: Accept and deliver message - the default option. Reinstate
2029 receiving_message, which got turned off for all -b options. */
2031 else if (Ustrcmp(argrest, "m") == 0) receiving_message = TRUE;
2033 /* -bmalware: test the filename given for malware */
2035 else if (Ustrcmp(argrest, "malware") == 0)
2037 if (++i >= argc) { badarg = TRUE; break; }
2038 malware_test_file = argv[i];
2041 /* -bnq: For locally originating messages, do not qualify unqualified
2042 addresses. In the envelope, this causes errors; in header lines they
2045 else if (Ustrcmp(argrest, "nq") == 0)
2047 allow_unqualified_sender = FALSE;
2048 allow_unqualified_recipient = FALSE;
2051 /* -bpxx: List the contents of the mail queue, in various forms. If
2052 the option is -bpc, just a queue count is needed. Otherwise, if the
2053 first letter after p is r, then order is random. */
2055 else if (*argrest == 'p')
2057 if (*(++argrest) == 'c')
2060 if (*(++argrest) != 0) badarg = TRUE;
2064 if (*argrest == 'r')
2066 list_queue_option = 8;
2069 else list_queue_option = 0;
2073 /* -bp: List the contents of the mail queue, top-level only */
2075 if (*argrest == 0) {}
2077 /* -bpu: List the contents of the mail queue, top-level undelivered */
2079 else if (Ustrcmp(argrest, "u") == 0) list_queue_option += 1;
2081 /* -bpa: List the contents of the mail queue, including all delivered */
2083 else if (Ustrcmp(argrest, "a") == 0) list_queue_option += 2;
2085 /* Unknown after -bp[r] */
2095 /* -bP: List the configuration variables given as the address list.
2096 Force -v, so configuration errors get displayed. */
2098 else if (Ustrcmp(argrest, "P") == 0)
2100 list_options = TRUE;
2101 debug_selector |= D_v;
2102 debug_file = stderr;
2105 /* -brt: Test retry configuration lookup */
2107 else if (Ustrcmp(argrest, "rt") == 0)
2109 test_retry_arg = i + 1;
2113 /* -brw: Test rewrite configuration */
2115 else if (Ustrcmp(argrest, "rw") == 0)
2117 test_rewrite_arg = i + 1;
2121 /* -bS: Read SMTP commands on standard input, but produce no replies -
2122 all errors are reported by sending messages. */
2124 else if (Ustrcmp(argrest, "S") == 0)
2125 smtp_input = smtp_batched_input = receiving_message = TRUE;
2127 /* -bs: Read SMTP commands on standard input and produce SMTP replies
2128 on standard output. */
2130 else if (Ustrcmp(argrest, "s") == 0) smtp_input = receiving_message = TRUE;
2132 /* -bt: address testing mode */
2134 else if (Ustrcmp(argrest, "t") == 0)
2135 address_test_mode = checking = log_testing_mode = TRUE;
2137 /* -bv: verify addresses */
2139 else if (Ustrcmp(argrest, "v") == 0)
2140 verify_address_mode = checking = log_testing_mode = TRUE;
2142 /* -bvs: verify sender addresses */
2144 else if (Ustrcmp(argrest, "vs") == 0)
2146 verify_address_mode = checking = log_testing_mode = TRUE;
2147 verify_as_sender = TRUE;
2150 /* -bV: Print version string and support details */
2152 else if (Ustrcmp(argrest, "V") == 0)
2154 printf("Exim version %s #%s built %s\n", version_string,
2155 version_cnumber, version_date);
2156 printf("%s\n", CS version_copyright);
2157 version_printed = TRUE;
2158 show_whats_supported(stdout);
2161 /* -bw: inetd wait mode, accept a listening socket as stdin */
2163 else if (*argrest == 'w')
2165 inetd_wait_mode = TRUE;
2166 background_daemon = FALSE;
2167 daemon_listen = TRUE;
2168 if (*(++argrest) != '\0')
2170 inetd_wait_timeout = readconf_readtime(argrest, 0, FALSE);
2171 if (inetd_wait_timeout <= 0)
2173 fprintf(stderr, "exim: bad time value %s: abandoned\n", argv[i]);
2183 /* -C: change configuration file list; ignore if it isn't really
2184 a change! Enforce a prefix check if required. */
2189 if(++i < argc) argrest = argv[i]; else
2190 { badarg = TRUE; break; }
2192 if (Ustrcmp(config_main_filelist, argrest) != 0)
2194 #ifdef ALT_CONFIG_PREFIX
2196 int len = Ustrlen(ALT_CONFIG_PREFIX);
2197 uschar *list = argrest;
2199 while((filename = string_nextinlist(&list, &sep, big_buffer,
2200 big_buffer_size)) != NULL)
2202 if ((Ustrlen(filename) < len ||
2203 Ustrncmp(filename, ALT_CONFIG_PREFIX, len) != 0 ||
2204 Ustrstr(filename, "/../") != NULL) &&
2205 (Ustrcmp(filename, "/dev/null") != 0 || real_uid != root_uid))
2207 fprintf(stderr, "-C Permission denied\n");
2212 if (real_uid != root_uid)
2214 #ifdef TRUSTED_CONFIG_LIST
2216 if (real_uid != exim_uid
2217 #ifdef CONFIGURE_OWNER
2218 && real_uid != config_uid
2221 trusted_config = FALSE;
2224 FILE *trust_list = Ufopen(TRUSTED_CONFIG_LIST, "rb");
2227 struct stat statbuf;
2229 if (fstat(fileno(trust_list), &statbuf) != 0 ||
2230 (statbuf.st_uid != root_uid /* owner not root */
2231 #ifdef CONFIGURE_OWNER
2232 && statbuf.st_uid != config_uid /* owner not the special one */
2235 (statbuf.st_gid != root_gid /* group not root */
2236 #ifdef CONFIGURE_GROUP
2237 && statbuf.st_gid != config_gid /* group not the special one */
2239 && (statbuf.st_mode & 020) != 0 /* group writeable */
2241 (statbuf.st_mode & 2) != 0) /* world writeable */
2243 trusted_config = FALSE;
2248 /* Well, the trust list at least is up to scratch... */
2249 void *reset_point = store_get(0);
2250 uschar *trusted_configs[32];
2254 while (Ufgets(big_buffer, big_buffer_size, trust_list))
2256 uschar *start = big_buffer, *nl;
2257 while (*start && isspace(*start))
2261 nl = Ustrchr(start, '\n');
2264 trusted_configs[nr_configs++] = string_copy(start);
2265 if (nr_configs == 32)
2273 uschar *list = argrest;
2275 while (trusted_config && (filename = string_nextinlist(&list,
2276 &sep, big_buffer, big_buffer_size)) != NULL)
2278 for (i=0; i < nr_configs; i++)
2280 if (Ustrcmp(filename, trusted_configs[i]) == 0)
2283 if (i == nr_configs)
2285 trusted_config = FALSE;
2289 store_reset(reset_point);
2293 /* No valid prefixes found in trust_list file. */
2294 trusted_config = FALSE;
2300 /* Could not open trust_list file. */
2301 trusted_config = FALSE;
2305 /* Not root; don't trust config */
2306 trusted_config = FALSE;
2310 config_main_filelist = argrest;
2311 config_changed = TRUE;
2316 /* -D: set up a macro definition */
2319 #ifdef DISABLE_D_OPTION
2320 fprintf(stderr, "exim: -D is not available in this Exim binary\n");
2325 macro_item *mlast = NULL;
2328 uschar *s = argrest;
2330 while (isspace(*s)) s++;
2332 if (*s < 'A' || *s > 'Z')
2334 fprintf(stderr, "exim: macro name set by -D must start with "
2335 "an upper case letter\n");
2339 while (isalnum(*s) || *s == '_')
2341 if (ptr < sizeof(name)-1) name[ptr++] = *s;
2345 if (ptr == 0) { badarg = TRUE; break; }
2346 while (isspace(*s)) s++;
2349 if (*s++ != '=') { badarg = TRUE; break; }
2350 while (isspace(*s)) s++;
2353 for (m = macros; m != NULL; m = m->next)
2355 if (Ustrcmp(m->name, name) == 0)
2357 fprintf(stderr, "exim: duplicated -D in command line\n");
2363 m = store_get(sizeof(macro_item) + Ustrlen(name));
2365 m->command_line = TRUE;
2366 if (mlast == NULL) macros = m; else mlast->next = m;
2367 Ustrcpy(m->name, name);
2368 m->replacement = string_copy(s);
2370 if (clmacro_count >= MAX_CLMACROS)
2372 fprintf(stderr, "exim: too many -D options on command line\n");
2375 clmacros[clmacro_count++] = string_sprintf("-D%s=%s", m->name,
2381 /* -d: Set debug level (see also -v below) or set the drop_cr option.
2382 The latter is now a no-op, retained for compatibility only. If -dd is used,
2383 debugging subprocesses of the daemon is disabled. */
2386 if (Ustrcmp(argrest, "ropcr") == 0)
2388 /* drop_cr = TRUE; */
2391 /* Use an intermediate variable so that we don't set debugging while
2392 decoding the debugging bits. */
2396 unsigned int selector = D_default;
2399 if (*argrest == 'd')
2401 debug_daemon = TRUE;
2405 decode_bits(&selector, NULL, D_memory, 0, argrest, debug_options,
2406 debug_options_count, US"debug", 0);
2407 debug_selector = selector;
2412 /* -E: This is a local error message. This option is not intended for
2413 external use at all, but is not restricted to trusted callers because it
2414 does no harm (just suppresses certain error messages) and if Exim is run
2415 not setuid root it won't always be trusted when it generates error
2416 messages using this option. If there is a message id following -E, point
2417 message_reference at it, for logging. */
2420 local_error_message = TRUE;
2421 if (mac_ismsgid(argrest)) message_reference = argrest;
2425 /* -ex: The vacation program calls sendmail with the undocumented "-eq"
2426 option, so it looks as if historically the -oex options are also callable
2427 without the leading -o. So we have to accept them. Before the switch,
2428 anything starting -oe has been converted to -e. Exim does not support all
2429 of the sendmail error options. */
2432 if (Ustrcmp(argrest, "e") == 0)
2434 arg_error_handling = ERRORS_SENDER;
2435 errors_sender_rc = EXIT_SUCCESS;
2437 else if (Ustrcmp(argrest, "m") == 0) arg_error_handling = ERRORS_SENDER;
2438 else if (Ustrcmp(argrest, "p") == 0) arg_error_handling = ERRORS_STDERR;
2439 else if (Ustrcmp(argrest, "q") == 0) arg_error_handling = ERRORS_STDERR;
2440 else if (Ustrcmp(argrest, "w") == 0) arg_error_handling = ERRORS_SENDER;
2445 /* -F: Set sender's full name, used instead of the gecos entry from
2446 the password file. Since users can usually alter their gecos entries,
2447 there's no security involved in using this instead. The data can follow
2448 the -F or be in the next argument. */
2453 if(++i < argc) argrest = argv[i]; else
2454 { badarg = TRUE; break; }
2456 originator_name = argrest;
2457 sender_name_forced = TRUE;
2461 /* -f: Set sender's address - this value is only actually used if Exim is
2462 run by a trusted user, or if untrusted_set_sender is set and matches the
2463 address, except that the null address can always be set by any user. The
2464 test for this happens later, when the value given here is ignored when not
2465 permitted. For an untrusted user, the actual sender is still put in Sender:
2466 if it doesn't match the From: header (unless no_local_from_check is set).
2467 The data can follow the -f or be in the next argument. The -r switch is an
2468 obsolete form of -f but since there appear to be programs out there that
2469 use anything that sendmail has ever supported, better accept it - the
2470 synonymizing is done before the switch above.
2472 At this stage, we must allow domain literal addresses, because we don't
2473 know what the setting of allow_domain_literals is yet. Ditto for trailing
2474 dots and strip_trailing_dot. */
2482 if (i+1 < argc) argrest = argv[++i]; else
2483 { badarg = TRUE; break; }
2487 sender_address = string_sprintf(""); /* Ensure writeable memory */
2491 uschar *temp = argrest + Ustrlen(argrest) - 1;
2492 while (temp >= argrest && isspace(*temp)) temp--;
2493 if (temp >= argrest && *temp == '.') f_end_dot = TRUE;
2494 allow_domain_literals = TRUE;
2495 strip_trailing_dot = TRUE;
2496 sender_address = parse_extract_address(argrest, &errmess, &start, &end,
2497 &sender_address_domain, TRUE);
2498 allow_domain_literals = FALSE;
2499 strip_trailing_dot = FALSE;
2500 if (sender_address == NULL)
2502 fprintf(stderr, "exim: bad -f address \"%s\": %s\n", argrest, errmess);
2503 return EXIT_FAILURE;
2506 sender_address_forced = TRUE;
2510 /* -G: sendmail invocation to specify that it's a gateway submission and
2511 sendmail may complain about problems instead of fixing them.
2512 We make it equivalent to an ACL "control = suppress_local_fixups" and do
2513 not at this time complain about problems. */
2519 /* -h: Set the hop count for an incoming message. Exim does not currently
2520 support this; it always computes it by counting the Received: headers.
2521 To put it in will require a change to the spool header file format. */
2526 if(++i < argc) argrest = argv[i]; else
2527 { badarg = TRUE; break; }
2529 if (!isdigit(*argrest)) badarg = TRUE;
2533 /* -i: Set flag so dot doesn't end non-SMTP input (same as -oi, seems
2534 not to be documented for sendmail but mailx (at least) uses it) */
2537 if (*argrest == 0) dot_ends = FALSE; else badarg = TRUE;
2541 /* -L: set the identifier used for syslog; equivalent to setting
2542 syslog_processname in the config file, but needs to be an admin option. */
2545 if (*argrest == '\0')
2547 if(++i < argc) argrest = argv[i]; else
2548 { badarg = TRUE; break; }
2550 sz = Ustrlen(argrest);
2553 fprintf(stderr, "exim: the -L syslog name is too long: \"%s\"\n", argrest);
2554 return EXIT_FAILURE;
2558 fprintf(stderr, "exim: the -L syslog name is too short\n");
2559 return EXIT_FAILURE;
2561 cmdline_syslog_name = argrest;
2565 receiving_message = FALSE;
2567 /* -MC: continue delivery of another message via an existing open
2568 file descriptor. This option is used for an internal call by the
2569 smtp transport when there is a pending message waiting to go to an
2570 address to which it has got a connection. Five subsequent arguments are
2571 required: transport name, host name, IP address, sequence number, and
2572 message_id. Transports may decline to create new processes if the sequence
2573 number gets too big. The channel is stdin. This (-MC) must be the last
2574 argument. There's a subsequent check that the real-uid is privileged.
2576 If we are running in the test harness. delay for a bit, to let the process
2577 that set this one up complete. This makes for repeatability of the logging,
2580 if (Ustrcmp(argrest, "C") == 0)
2582 union sockaddr_46 interface_sock;
2583 EXIM_SOCKLEN_T size = sizeof(interface_sock);
2587 fprintf(stderr, "exim: too many or too few arguments after -MC\n");
2588 return EXIT_FAILURE;
2591 if (msg_action_arg >= 0)
2593 fprintf(stderr, "exim: incompatible arguments\n");
2594 return EXIT_FAILURE;
2597 continue_transport = argv[++i];
2598 continue_hostname = argv[++i];
2599 continue_host_address = argv[++i];
2600 continue_sequence = Uatoi(argv[++i]);
2601 msg_action = MSG_DELIVER;
2602 msg_action_arg = ++i;
2603 forced_delivery = TRUE;
2604 queue_run_pid = passed_qr_pid;
2605 queue_run_pipe = passed_qr_pipe;
2607 if (!mac_ismsgid(argv[i]))
2609 fprintf(stderr, "exim: malformed message id %s after -MC option\n",
2611 return EXIT_FAILURE;
2614 /* Set up $sending_ip_address and $sending_port */
2616 if (getsockname(fileno(stdin), (struct sockaddr *)(&interface_sock),
2618 sending_ip_address = host_ntoa(-1, &interface_sock, NULL,
2622 fprintf(stderr, "exim: getsockname() failed after -MC option: %s\n",
2624 return EXIT_FAILURE;
2627 if (running_in_test_harness) millisleep(500);
2631 /* -MCA: set the smtp_authenticated flag; this is useful only when it
2632 precedes -MC (see above). The flag indicates that the host to which
2633 Exim is connected has accepted an AUTH sequence. */
2635 else if (Ustrcmp(argrest, "CA") == 0)
2637 smtp_authenticated = TRUE;
2641 /* -MCP: set the smtp_use_pipelining flag; this is useful only when
2642 it preceded -MC (see above) */
2644 else if (Ustrcmp(argrest, "CP") == 0)
2646 smtp_use_pipelining = TRUE;
2650 /* -MCQ: pass on the pid of the queue-running process that started
2651 this chain of deliveries and the fd of its synchronizing pipe; this
2652 is useful only when it precedes -MC (see above) */
2654 else if (Ustrcmp(argrest, "CQ") == 0)
2656 if(++i < argc) passed_qr_pid = (pid_t)(Uatol(argv[i]));
2658 if(++i < argc) passed_qr_pipe = (int)(Uatol(argv[i]));
2663 /* -MCS: set the smtp_use_size flag; this is useful only when it
2664 precedes -MC (see above) */
2666 else if (Ustrcmp(argrest, "CS") == 0)
2668 smtp_use_size = TRUE;
2672 /* -MCT: set the tls_offered flag; this is useful only when it
2673 precedes -MC (see above). The flag indicates that the host to which
2674 Exim is connected has offered TLS support. */
2677 else if (Ustrcmp(argrest, "CT") == 0)
2684 /* -M[x]: various operations on the following list of message ids:
2685 -M deliver the messages, ignoring next retry times and thawing
2686 -Mc deliver the messages, checking next retry times, no thawing
2687 -Mf freeze the messages
2688 -Mg give up on the messages
2689 -Mt thaw the messages
2690 -Mrm remove the messages
2691 In the above cases, this must be the last option. There are also the
2692 following options which are followed by a single message id, and which
2693 act on that message. Some of them use the "recipient" addresses as well.
2694 -Mar add recipient(s)
2695 -Mmad mark all recipients delivered
2696 -Mmd mark recipients(s) delivered
2698 -Mset load a message for use with -be
2700 -Mvc show copy (of whole message, in RFC 2822 format)
2705 else if (*argrest == 0)
2707 msg_action = MSG_DELIVER;
2708 forced_delivery = deliver_force_thaw = TRUE;
2710 else if (Ustrcmp(argrest, "ar") == 0)
2712 msg_action = MSG_ADD_RECIPIENT;
2713 one_msg_action = TRUE;
2715 else if (Ustrcmp(argrest, "c") == 0) msg_action = MSG_DELIVER;
2716 else if (Ustrcmp(argrest, "es") == 0)
2718 msg_action = MSG_EDIT_SENDER;
2719 one_msg_action = TRUE;
2721 else if (Ustrcmp(argrest, "f") == 0) msg_action = MSG_FREEZE;
2722 else if (Ustrcmp(argrest, "g") == 0)
2724 msg_action = MSG_DELIVER;
2725 deliver_give_up = TRUE;
2727 else if (Ustrcmp(argrest, "mad") == 0)
2729 msg_action = MSG_MARK_ALL_DELIVERED;
2731 else if (Ustrcmp(argrest, "md") == 0)
2733 msg_action = MSG_MARK_DELIVERED;
2734 one_msg_action = TRUE;
2736 else if (Ustrcmp(argrest, "rm") == 0) msg_action = MSG_REMOVE;
2737 else if (Ustrcmp(argrest, "set") == 0)
2739 msg_action = MSG_LOAD;
2740 one_msg_action = TRUE;
2742 else if (Ustrcmp(argrest, "t") == 0) msg_action = MSG_THAW;
2743 else if (Ustrcmp(argrest, "vb") == 0)
2745 msg_action = MSG_SHOW_BODY;
2746 one_msg_action = TRUE;
2748 else if (Ustrcmp(argrest, "vc") == 0)
2750 msg_action = MSG_SHOW_COPY;
2751 one_msg_action = TRUE;
2753 else if (Ustrcmp(argrest, "vh") == 0)
2755 msg_action = MSG_SHOW_HEADER;
2756 one_msg_action = TRUE;
2758 else if (Ustrcmp(argrest, "vl") == 0)
2760 msg_action = MSG_SHOW_LOG;
2761 one_msg_action = TRUE;
2763 else { badarg = TRUE; break; }
2765 /* All the -Mxx options require at least one message id. */
2767 msg_action_arg = i + 1;
2768 if (msg_action_arg >= argc)
2770 fprintf(stderr, "exim: no message ids given after %s option\n", arg);
2771 return EXIT_FAILURE;
2774 /* Some require only message ids to follow */
2776 if (!one_msg_action)
2779 for (j = msg_action_arg; j < argc; j++) if (!mac_ismsgid(argv[j]))
2781 fprintf(stderr, "exim: malformed message id %s after %s option\n",
2783 return EXIT_FAILURE;
2785 goto END_ARG; /* Remaining args are ids */
2788 /* Others require only one message id, possibly followed by addresses,
2789 which will be handled as normal arguments. */
2793 if (!mac_ismsgid(argv[msg_action_arg]))
2795 fprintf(stderr, "exim: malformed message id %s after %s option\n",
2796 argv[msg_action_arg], arg);
2797 return EXIT_FAILURE;
2804 /* Some programs seem to call the -om option without the leading o;
2805 for sendmail it askes for "me too". Exim always does this. */
2808 if (*argrest != 0) badarg = TRUE;
2812 /* -N: don't do delivery - a debugging option that stops transports doing
2813 their thing. It implies debugging at the D_v level. */
2818 dont_deliver = TRUE;
2819 debug_selector |= D_v;
2820 debug_file = stderr;
2826 /* -n: This means "don't alias" in sendmail, apparently.
2827 For normal invocations, it has no effect.
2828 It may affect some other options. */
2834 /* -O: Just ignore it. In sendmail, apparently -O option=value means set
2835 option to the specified value. This form uses long names. We need to handle
2836 -O option=value and -Ooption=value. */
2843 fprintf(stderr, "exim: string expected after -O\n");
2851 /* -oA: Set an argument for the bi command (sendmail's "alternate alias
2854 if (*argrest == 'A')
2856 alias_arg = argrest + 1;
2857 if (alias_arg[0] == 0)
2859 if (i+1 < argc) alias_arg = argv[++i]; else
2861 fprintf(stderr, "exim: string expected after -oA\n");
2867 /* -oB: Set a connection message max value for remote deliveries */
2869 else if (*argrest == 'B')
2871 uschar *p = argrest + 1;
2874 if (i+1 < argc && isdigit((argv[i+1][0]))) p = argv[++i]; else
2876 connection_max_messages = 1;
2885 fprintf(stderr, "exim: number expected after -oB\n");
2888 connection_max_messages = Uatoi(p);
2892 /* -odb: background delivery */
2894 else if (Ustrcmp(argrest, "db") == 0)
2896 synchronous_delivery = FALSE;
2897 arg_queue_only = FALSE;
2898 queue_only_set = TRUE;
2901 /* -odf: foreground delivery (smail-compatible option); same effect as
2902 -odi: interactive (synchronous) delivery (sendmail-compatible option)
2905 else if (Ustrcmp(argrest, "df") == 0 || Ustrcmp(argrest, "di") == 0)
2907 synchronous_delivery = TRUE;
2908 arg_queue_only = FALSE;
2909 queue_only_set = TRUE;
2912 /* -odq: queue only */
2914 else if (Ustrcmp(argrest, "dq") == 0)
2916 synchronous_delivery = FALSE;
2917 arg_queue_only = TRUE;
2918 queue_only_set = TRUE;
2921 /* -odqs: queue SMTP only - do local deliveries and remote routing,
2922 but no remote delivery */
2924 else if (Ustrcmp(argrest, "dqs") == 0)
2927 arg_queue_only = FALSE;
2928 queue_only_set = TRUE;
2931 /* -oex: Sendmail error flags. As these are also accepted without the
2932 leading -o prefix, for compatibility with vacation and other callers,
2933 they are handled with -e above. */
2935 /* -oi: Set flag so dot doesn't end non-SMTP input (same as -i)
2936 -oitrue: Another sendmail syntax for the same */
2938 else if (Ustrcmp(argrest, "i") == 0 ||
2939 Ustrcmp(argrest, "itrue") == 0)
2942 /* -oM*: Set various characteristics for an incoming message; actually
2943 acted on for trusted callers only. */
2945 else if (*argrest == 'M')
2949 fprintf(stderr, "exim: data expected after -o%s\n", argrest);
2953 /* -oMa: Set sender host address */
2955 if (Ustrcmp(argrest, "Ma") == 0) sender_host_address = argv[++i];
2957 /* -oMaa: Set authenticator name */
2959 else if (Ustrcmp(argrest, "Maa") == 0)
2960 sender_host_authenticated = argv[++i];
2962 /* -oMas: setting authenticated sender */
2964 else if (Ustrcmp(argrest, "Mas") == 0) authenticated_sender = argv[++i];
2966 /* -oMai: setting authenticated id */
2968 else if (Ustrcmp(argrest, "Mai") == 0) authenticated_id = argv[++i];
2970 /* -oMi: Set incoming interface address */
2972 else if (Ustrcmp(argrest, "Mi") == 0) interface_address = argv[++i];
2974 /* -oMr: Received protocol */
2976 else if (Ustrcmp(argrest, "Mr") == 0) received_protocol = argv[++i];
2978 /* -oMs: Set sender host name */
2980 else if (Ustrcmp(argrest, "Ms") == 0) sender_host_name = argv[++i];
2982 /* -oMt: Set sender ident */
2984 else if (Ustrcmp(argrest, "Mt") == 0)
2986 sender_ident_set = TRUE;
2987 sender_ident = argv[++i];
2990 /* Else a bad argument */
2999 /* -om: Me-too flag for aliases. Exim always does this. Some programs
3000 seem to call this as -m (undocumented), so that is also accepted (see
3003 else if (Ustrcmp(argrest, "m") == 0) {}
3005 /* -oo: An ancient flag for old-style addresses which still seems to
3006 crop up in some calls (see in SCO). */
3008 else if (Ustrcmp(argrest, "o") == 0) {}
3010 /* -oP <name>: set pid file path for daemon */
3012 else if (Ustrcmp(argrest, "P") == 0)
3013 override_pid_file_path = argv[++i];
3015 /* -or <n>: set timeout for non-SMTP acceptance
3016 -os <n>: set timeout for SMTP acceptance */
3018 else if (*argrest == 'r' || *argrest == 's')
3020 int *tp = (*argrest == 'r')?
3021 &arg_receive_timeout : &arg_smtp_receive_timeout;
3022 if (argrest[1] == 0)
3024 if (i+1 < argc) *tp= readconf_readtime(argv[++i], 0, FALSE);
3026 else *tp = readconf_readtime(argrest + 1, 0, FALSE);
3029 fprintf(stderr, "exim: bad time value %s: abandoned\n", argv[i]);
3034 /* -oX <list>: Override local_interfaces and/or default daemon ports */
3036 else if (Ustrcmp(argrest, "X") == 0)
3037 override_local_interfaces = argv[++i];
3039 /* Unknown -o argument */
3045 /* -ps: force Perl startup; -pd force delayed Perl startup */
3049 if (*argrest == 's' && argrest[1] == 0)
3051 perl_start_option = 1;
3054 if (*argrest == 'd' && argrest[1] == 0)
3056 perl_start_option = -1;
3061 /* -panythingelse is taken as the Sendmail-compatible argument -prval:sval,
3062 which sets the host protocol and host name */
3066 if (i+1 < argc) argrest = argv[++i]; else
3067 { badarg = TRUE; break; }
3072 uschar *hn = Ustrchr(argrest, ':');
3075 received_protocol = argrest;
3079 received_protocol = string_copyn(argrest, hn - argrest);
3080 sender_host_name = hn + 1;
3087 receiving_message = FALSE;
3088 if (queue_interval >= 0)
3090 fprintf(stderr, "exim: -q specified more than once\n");
3094 /* -qq...: Do queue runs in a 2-stage manner */
3096 if (*argrest == 'q')
3098 queue_2stage = TRUE;
3102 /* -qi...: Do only first (initial) deliveries */
3104 if (*argrest == 'i')
3106 queue_run_first_delivery = TRUE;
3110 /* -qf...: Run the queue, forcing deliveries
3111 -qff..: Ditto, forcing thawing as well */
3113 if (*argrest == 'f')
3115 queue_run_force = TRUE;
3116 if (*(++argrest) == 'f')
3118 deliver_force_thaw = TRUE;
3123 /* -q[f][f]l...: Run the queue only on local deliveries */
3125 if (*argrest == 'l')
3127 queue_run_local = TRUE;
3131 /* -q[f][f][l]: Run the queue, optionally forced, optionally local only,
3132 optionally starting from a given message id. */
3134 if (*argrest == 0 &&
3135 (i + 1 >= argc || argv[i+1][0] == '-' || mac_ismsgid(argv[i+1])))
3138 if (i+1 < argc && mac_ismsgid(argv[i+1]))
3139 start_queue_run_id = argv[++i];
3140 if (i+1 < argc && mac_ismsgid(argv[i+1]))
3141 stop_queue_run_id = argv[++i];
3144 /* -q[f][f][l]<n>: Run the queue at regular intervals, optionally forced,
3145 optionally local only. */
3150 queue_interval = readconf_readtime(argrest, 0, FALSE);
3152 queue_interval = readconf_readtime(argv[++i], 0, FALSE);
3153 if (queue_interval <= 0)
3155 fprintf(stderr, "exim: bad time value %s: abandoned\n", argv[i]);
3162 case 'R': /* Synonymous with -qR... */
3163 receiving_message = FALSE;
3165 /* -Rf: As -R (below) but force all deliveries,
3166 -Rff: Ditto, but also thaw all frozen messages,
3167 -Rr: String is regex
3168 -Rrf: Regex and force
3169 -Rrff: Regex and force and thaw
3171 in all cases provided there are no further characters in this
3177 for (i = 0; i < sizeof(rsopts)/sizeof(uschar *); i++)
3179 if (Ustrcmp(argrest, rsopts[i]) == 0)
3181 if (i != 2) queue_run_force = TRUE;
3182 if (i >= 2) deliver_selectstring_regex = TRUE;
3183 if (i == 1 || i == 4) deliver_force_thaw = TRUE;
3184 argrest += Ustrlen(rsopts[i]);
3189 /* -R: Set string to match in addresses for forced queue run to
3190 pick out particular messages. */
3194 if (i+1 < argc) deliver_selectstring = argv[++i]; else
3196 fprintf(stderr, "exim: string expected after -R\n");
3200 else deliver_selectstring = argrest;
3204 /* -r: an obsolete synonym for -f (see above) */
3207 /* -S: Like -R but works on sender. */
3209 case 'S': /* Synonymous with -qS... */
3210 receiving_message = FALSE;
3212 /* -Sf: As -S (below) but force all deliveries,
3213 -Sff: Ditto, but also thaw all frozen messages,
3214 -Sr: String is regex
3215 -Srf: Regex and force
3216 -Srff: Regex and force and thaw
3218 in all cases provided there are no further characters in this
3224 for (i = 0; i < sizeof(rsopts)/sizeof(uschar *); i++)
3226 if (Ustrcmp(argrest, rsopts[i]) == 0)
3228 if (i != 2) queue_run_force = TRUE;
3229 if (i >= 2) deliver_selectstring_sender_regex = TRUE;
3230 if (i == 1 || i == 4) deliver_force_thaw = TRUE;
3231 argrest += Ustrlen(rsopts[i]);
3236 /* -S: Set string to match in addresses for forced queue run to
3237 pick out particular messages. */
3241 if (i+1 < argc) deliver_selectstring_sender = argv[++i]; else
3243 fprintf(stderr, "exim: string expected after -S\n");
3247 else deliver_selectstring_sender = argrest;
3250 /* -Tqt is an option that is exclusively for use by the testing suite.
3251 It is not recognized in other circumstances. It allows for the setting up
3252 of explicit "queue times" so that various warning/retry things can be
3253 tested. Otherwise variability of clock ticks etc. cause problems. */
3256 if (running_in_test_harness && Ustrcmp(argrest, "qt") == 0)
3257 fudged_queue_times = argv[++i];
3262 /* -t: Set flag to extract recipients from body of message. */
3265 if (*argrest == 0) extract_recipients = TRUE;
3267 /* -ti: Set flag to extract recipients from body of message, and also
3268 specify that dot does not end the message. */
3270 else if (Ustrcmp(argrest, "i") == 0)
3272 extract_recipients = TRUE;
3276 /* -tls-on-connect: don't wait for STARTTLS (for old clients) */
3279 else if (Ustrcmp(argrest, "ls-on-connect") == 0) tls_in.on_connect = TRUE;
3286 /* -U: This means "initial user submission" in sendmail, apparently. The
3287 doc claims that in future sendmail may refuse syntactically invalid
3288 messages instead of fixing them. For the moment, we just ignore it. */
3294 /* -v: verify things - this is a very low-level debugging */
3299 debug_selector |= D_v;
3300 debug_file = stderr;
3306 /* -x: AIX uses this to indicate some fancy 8-bit character stuff:
3308 The -x flag tells the sendmail command that mail from a local
3309 mail program has National Language Support (NLS) extended characters
3310 in the body of the mail item. The sendmail command can send mail with
3311 extended NLS characters across networks that normally corrupts these
3314 As Exim is 8-bit clean, it just ignores this flag. */
3317 if (*argrest != 0) badarg = TRUE;
3320 /* -X: in sendmail: takes one parameter, logfile, and sends debugging
3321 logs to that file. We swallow the parameter and otherwise ignore it. */
3324 if (*argrest == '\0')
3328 fprintf(stderr, "exim: string expected after -X\n");
3334 /* All other initial characters are errors */
3339 } /* End of high-level switch statement */
3341 /* Failed to recognize the option, or syntax error */
3345 fprintf(stderr, "exim abandoned: unknown, malformed, or incomplete "
3346 "option %s\n", arg);
3352 /* If -R or -S have been specified without -q, assume a single queue run. */
3354 if ((deliver_selectstring != NULL || deliver_selectstring_sender != NULL) &&
3355 queue_interval < 0) queue_interval = 0;
3359 /* If usage_wanted is set we call the usage function - which never returns */
3360 if (usage_wanted) exim_usage(called_as);
3362 /* Arguments have been processed. Check for incompatibilities. */
3364 (smtp_input || extract_recipients || recipients_arg < argc) &&
3365 (daemon_listen || queue_interval >= 0 || bi_option ||
3366 test_retry_arg >= 0 || test_rewrite_arg >= 0 ||
3367 filter_test != FTEST_NONE || (msg_action_arg > 0 && !one_msg_action))
3370 msg_action_arg > 0 &&
3371 (daemon_listen || queue_interval >= 0 || list_options ||
3372 (checking && msg_action != MSG_LOAD) ||
3373 bi_option || test_retry_arg >= 0 || test_rewrite_arg >= 0)
3376 (daemon_listen || queue_interval >= 0) &&
3377 (sender_address != NULL || list_options || list_queue || checking ||
3381 daemon_listen && queue_interval == 0
3384 inetd_wait_mode && queue_interval >= 0
3388 (checking || smtp_input || extract_recipients ||
3389 filter_test != FTEST_NONE || bi_option)
3392 verify_address_mode &&
3393 (address_test_mode || smtp_input || extract_recipients ||
3394 filter_test != FTEST_NONE || bi_option)
3397 address_test_mode && (smtp_input || extract_recipients ||
3398 filter_test != FTEST_NONE || bi_option)
3401 smtp_input && (sender_address != NULL || filter_test != FTEST_NONE ||
3405 deliver_selectstring != NULL && queue_interval < 0
3408 msg_action == MSG_LOAD &&
3409 (!expansion_test || expansion_test_message != NULL)
3413 fprintf(stderr, "exim: incompatible command-line options or arguments\n");
3417 /* If debugging is set up, set the file and the file descriptor to pass on to
3418 child processes. It should, of course, be 2 for stderr. Also, force the daemon
3419 to run in the foreground. */
3421 if (debug_selector != 0)
3423 debug_file = stderr;
3424 debug_fd = fileno(debug_file);
3425 background_daemon = FALSE;
3426 if (running_in_test_harness) millisleep(100); /* lets caller finish */
3427 if (debug_selector != D_v) /* -v only doesn't show this */
3429 debug_printf("Exim version %s uid=%ld gid=%ld pid=%d D=%x\n",
3430 version_string, (long int)real_uid, (long int)real_gid, (int)getpid(),
3432 if (!version_printed)
3433 show_whats_supported(stderr);
3437 /* When started with root privilege, ensure that the limits on the number of
3438 open files and the number of processes (where that is accessible) are
3439 sufficiently large, or are unset, in case Exim has been called from an
3440 environment where the limits are screwed down. Not all OS have the ability to
3441 change some of these limits. */
3445 DEBUG(D_any) debug_print_ids(US"Exim has no root privilege:");
3451 #ifdef RLIMIT_NOFILE
3452 if (getrlimit(RLIMIT_NOFILE, &rlp) < 0)
3454 log_write(0, LOG_MAIN|LOG_PANIC, "getrlimit(RLIMIT_NOFILE) failed: %s",
3456 rlp.rlim_cur = rlp.rlim_max = 0;
3459 /* I originally chose 1000 as a nice big number that was unlikely to
3460 be exceeded. It turns out that some older OS have a fixed upper limit of
3463 if (rlp.rlim_cur < 1000)
3465 rlp.rlim_cur = rlp.rlim_max = 1000;
3466 if (setrlimit(RLIMIT_NOFILE, &rlp) < 0)
3468 rlp.rlim_cur = rlp.rlim_max = 256;
3469 if (setrlimit(RLIMIT_NOFILE, &rlp) < 0)
3470 log_write(0, LOG_MAIN|LOG_PANIC, "setrlimit(RLIMIT_NOFILE) failed: %s",
3477 if (getrlimit(RLIMIT_NPROC, &rlp) < 0)
3479 log_write(0, LOG_MAIN|LOG_PANIC, "getrlimit(RLIMIT_NPROC) failed: %s",
3481 rlp.rlim_cur = rlp.rlim_max = 0;
3484 #ifdef RLIM_INFINITY
3485 if (rlp.rlim_cur != RLIM_INFINITY && rlp.rlim_cur < 1000)
3487 rlp.rlim_cur = rlp.rlim_max = RLIM_INFINITY;
3489 if (rlp.rlim_cur < 1000)
3491 rlp.rlim_cur = rlp.rlim_max = 1000;
3493 if (setrlimit(RLIMIT_NPROC, &rlp) < 0)
3494 log_write(0, LOG_MAIN|LOG_PANIC, "setrlimit(RLIMIT_NPROC) failed: %s",
3500 /* Exim is normally entered as root (but some special configurations are
3501 possible that don't do this). However, it always spins off sub-processes that
3502 set their uid and gid as required for local delivery. We don't want to pass on
3503 any extra groups that root may belong to, so we want to get rid of them all at
3506 We need to obey setgroups() at this stage, before possibly giving up root
3507 privilege for a changed configuration file, but later on we might need to
3508 check on the additional groups for the admin user privilege - can't do that
3509 till after reading the config, which might specify the exim gid. Therefore,
3510 save the group list here first. */
3512 group_count = getgroups(NGROUPS_MAX, group_list);
3513 if (group_count < 0)
3515 fprintf(stderr, "exim: getgroups() failed: %s\n", strerror(errno));
3519 /* There is a fundamental difference in some BSD systems in the matter of
3520 groups. FreeBSD and BSDI are known to be different; NetBSD and OpenBSD are
3521 known not to be different. On the "different" systems there is a single group
3522 list, and the first entry in it is the current group. On all other versions of
3523 Unix there is a supplementary group list, which is in *addition* to the current
3524 group. Consequently, to get rid of all extraneous groups on a "standard" system
3525 you pass over 0 groups to setgroups(), while on a "different" system you pass
3526 over a single group - the current group, which is always the first group in the
3527 list. Calling setgroups() with zero groups on a "different" system results in
3528 an error return. The following code should cope with both types of system.
3530 However, if this process isn't running as root, setgroups() can't be used
3531 since you have to be root to run it, even if throwing away groups. Not being
3532 root here happens only in some unusual configurations. We just ignore the
3535 if (setgroups(0, NULL) != 0)
3537 if (setgroups(1, group_list) != 0 && !unprivileged)
3539 fprintf(stderr, "exim: setgroups() failed: %s\n", strerror(errno));
3544 /* If the configuration file name has been altered by an argument on the
3545 command line (either a new file name or a macro definition) and the caller is
3546 not root, or if this is a filter testing run, remove any setuid privilege the
3547 program has and run as the underlying user.
3549 The exim user is locked out of this, which severely restricts the use of -C
3552 Otherwise, set the real ids to the effective values (should be root unless run
3553 from inetd, which it can either be root or the exim uid, if one is configured).
3555 There is a private mechanism for bypassing some of this, in order to make it
3556 possible to test lots of configurations automatically, without having either to
3557 recompile each time, or to patch in an actual configuration file name and other
3558 values (such as the path name). If running in the test harness, pretend that
3559 configuration file changes and macro definitions haven't happened. */
3562 (!trusted_config || /* Config changed, or */
3563 !macros_trusted()) && /* impermissible macros and */
3564 real_uid != root_uid && /* Not root, and */
3565 !running_in_test_harness /* Not fudged */
3567 expansion_test /* expansion testing */
3569 filter_test != FTEST_NONE) /* Filter testing */
3571 setgroups(group_count, group_list);
3572 exim_setugid(real_uid, real_gid, FALSE,
3573 US"-C, -D, -be or -bf forces real uid");
3574 removed_privilege = TRUE;
3576 /* In the normal case when Exim is called like this, stderr is available
3577 and should be used for any logging information because attempts to write
3578 to the log will usually fail. To arrange this, we unset really_exim. However,
3579 if no stderr is available there is no point - we might as well have a go
3580 at the log (if it fails, syslog will be written).
3582 Note that if the invoker is Exim, the logs remain available. Messing with
3583 this causes unlogged successful deliveries. */
3585 if ((log_stderr != NULL) && (real_uid != exim_uid))
3586 really_exim = FALSE;
3589 /* Privilege is to be retained for the moment. It may be dropped later,
3590 depending on the job that this Exim process has been asked to do. For now, set
3591 the real uid to the effective so that subsequent re-execs of Exim are done by a
3594 else exim_setugid(geteuid(), getegid(), FALSE, US"forcing real = effective");
3596 /* If testing a filter, open the file(s) now, before wasting time doing other
3597 setups and reading the message. */
3599 if ((filter_test & FTEST_SYSTEM) != 0)
3601 filter_sfd = Uopen(filter_test_sfile, O_RDONLY, 0);
3604 fprintf(stderr, "exim: failed to open %s: %s\n", filter_test_sfile,
3606 return EXIT_FAILURE;
3610 if ((filter_test & FTEST_USER) != 0)
3612 filter_ufd = Uopen(filter_test_ufile, O_RDONLY, 0);
3615 fprintf(stderr, "exim: failed to open %s: %s\n", filter_test_ufile,
3617 return EXIT_FAILURE;
3621 /* Initialise lookup_list
3622 If debugging, already called above via version reporting.
3623 In either case, we initialise the list of available lookups while running
3624 as root. All dynamically modules are loaded from a directory which is
3625 hard-coded into the binary and is code which, if not a module, would be
3626 part of Exim already. Ability to modify the content of the directory
3627 is equivalent to the ability to modify a setuid binary!
3629 This needs to happen before we read the main configuration. */
3632 /* Read the main runtime configuration data; this gives up if there
3633 is a failure. It leaves the configuration file open so that the subsequent
3634 configuration data for delivery can be read if needed. */
3638 /* If an action on specific messages is requested, or if a daemon or queue
3639 runner is being started, we need to know if Exim was called by an admin user.
3640 This is the case if the real user is root or exim, or if the real group is
3641 exim, or if one of the supplementary groups is exim or a group listed in
3642 admin_groups. We don't fail all message actions immediately if not admin_user,
3643 since some actions can be performed by non-admin users. Instead, set admin_user
3644 for later interrogation. */
3646 if (real_uid == root_uid || real_uid == exim_uid || real_gid == exim_gid)
3651 for (i = 0; i < group_count; i++)
3653 if (group_list[i] == exim_gid) admin_user = TRUE;
3654 else if (admin_groups != NULL)
3656 for (j = 1; j <= (int)(admin_groups[0]); j++)
3657 if (admin_groups[j] == group_list[i])
3658 { admin_user = TRUE; break; }
3660 if (admin_user) break;
3664 /* Another group of privileged users are the trusted users. These are root,
3665 exim, and any caller matching trusted_users or trusted_groups. Trusted callers
3666 are permitted to specify sender_addresses with -f on the command line, and
3667 other message parameters as well. */
3669 if (real_uid == root_uid || real_uid == exim_uid)
3670 trusted_caller = TRUE;
3675 if (trusted_users != NULL)
3677 for (i = 1; i <= (int)(trusted_users[0]); i++)
3678 if (trusted_users[i] == real_uid)
3679 { trusted_caller = TRUE; break; }
3682 if (!trusted_caller && trusted_groups != NULL)
3684 for (i = 1; i <= (int)(trusted_groups[0]); i++)
3686 if (trusted_groups[i] == real_gid)
3687 trusted_caller = TRUE;
3688 else for (j = 0; j < group_count; j++)
3690 if (trusted_groups[i] == group_list[j])
3691 { trusted_caller = TRUE; break; }
3693 if (trusted_caller) break;
3698 /* Handle the decoding of logging options. */
3700 decode_bits(&log_write_selector, &log_extra_selector, 0, 0,
3701 log_selector_string, log_options, log_options_count, US"log", 0);
3705 debug_printf("configuration file is %s\n", config_main_filename);
3706 debug_printf("log selectors = %08x %08x\n", log_write_selector,
3707 log_extra_selector);
3710 /* If domain literals are not allowed, check the sender address that was
3711 supplied with -f. Ditto for a stripped trailing dot. */
3713 if (sender_address != NULL)
3715 if (sender_address[sender_address_domain] == '[' && !allow_domain_literals)
3717 fprintf(stderr, "exim: bad -f address \"%s\": domain literals not "
3718 "allowed\n", sender_address);
3719 return EXIT_FAILURE;
3721 if (f_end_dot && !strip_trailing_dot)
3723 fprintf(stderr, "exim: bad -f address \"%s.\": domain is malformed "
3724 "(trailing dot not allowed)\n", sender_address);
3725 return EXIT_FAILURE;
3729 /* See if an admin user overrode our logging. */
3731 if (cmdline_syslog_name != NULL)
3735 syslog_processname = cmdline_syslog_name;
3736 log_file_path = string_copy(CUS"syslog");
3740 /* not a panic, non-privileged users should not be able to spam paniclog */
3742 "exim: you lack sufficient privilege to specify syslog process name\n");
3743 return EXIT_FAILURE;
3747 /* Paranoia check of maximum lengths of certain strings. There is a check
3748 on the length of the log file path in log.c, which will come into effect
3749 if there are any calls to write the log earlier than this. However, if we
3750 get this far but the string is very long, it is better to stop now than to
3751 carry on and (e.g.) receive a message and then have to collapse. The call to
3752 log_write() from here will cause the ultimate panic collapse if the complete
3753 file name exceeds the buffer length. */
3755 if (Ustrlen(log_file_path) > 200)
3756 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3757 "log_file_path is longer than 200 chars: aborting");
3759 if (Ustrlen(pid_file_path) > 200)
3760 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3761 "pid_file_path is longer than 200 chars: aborting");
3763 if (Ustrlen(spool_directory) > 200)
3764 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3765 "spool_directory is longer than 200 chars: aborting");
3767 /* Length check on the process name given to syslog for its TAG field,
3768 which is only permitted to be 32 characters or less. See RFC 3164. */
3770 if (Ustrlen(syslog_processname) > 32)
3771 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3772 "syslog_processname is longer than 32 chars: aborting");
3774 /* In some operating systems, the environment variable TMPDIR controls where
3775 temporary files are created; Exim doesn't use these (apart from when delivering
3776 to MBX mailboxes), but called libraries such as DBM libraries may require them.
3777 If TMPDIR is found in the environment, reset it to the value defined in the
3778 TMPDIR macro, if this macro is defined. */
3783 for (p = USS environ; *p != NULL; p++)
3785 if (Ustrncmp(*p, "TMPDIR=", 7) == 0 &&
3786 Ustrcmp(*p+7, TMPDIR) != 0)
3788 uschar *newp = malloc(Ustrlen(TMPDIR) + 8);
3789 sprintf(CS newp, "TMPDIR=%s", TMPDIR);
3791 DEBUG(D_any) debug_printf("reset TMPDIR=%s in environment\n", TMPDIR);
3797 /* Timezone handling. If timezone_string is "utc", set a flag to cause all
3798 timestamps to be in UTC (gmtime() is used instead of localtime()). Otherwise,
3799 we may need to get rid of a bogus timezone setting. This can arise when Exim is
3800 called by a user who has set the TZ variable. This then affects the timestamps
3801 in log files and in Received: headers, and any created Date: header lines. The
3802 required timezone is settable in the configuration file, so nothing can be done
3803 about this earlier - but hopefully nothing will normally be logged earlier than
3804 this. We have to make a new environment if TZ is wrong, but don't bother if
3805 timestamps_utc is set, because then all times are in UTC anyway. */
3807 if (timezone_string != NULL && strcmpic(timezone_string, US"UTC") == 0)
3809 timestamps_utc = TRUE;
3813 uschar *envtz = US getenv("TZ");
3814 if ((envtz == NULL && timezone_string != NULL) ||
3816 (timezone_string == NULL ||
3817 Ustrcmp(timezone_string, envtz) != 0)))
3819 uschar **p = USS environ;
3823 while (*p++ != NULL) count++;
3824 if (envtz == NULL) count++;
3825 newp = new = malloc(sizeof(uschar *) * (count + 1));
3826 for (p = USS environ; *p != NULL; p++)
3828 if (Ustrncmp(*p, "TZ=", 3) == 0) continue;
3831 if (timezone_string != NULL)
3833 *newp = malloc(Ustrlen(timezone_string) + 4);
3834 sprintf(CS *newp++, "TZ=%s", timezone_string);
3839 DEBUG(D_any) debug_printf("Reset TZ to %s: time is %s\n", timezone_string,
3840 tod_stamp(tod_log));
3844 /* Handle the case when we have removed the setuid privilege because of -C or
3845 -D. This means that the caller of Exim was not root.
3847 There is a problem if we were running as the Exim user. The sysadmin may
3848 expect this case to retain privilege because "the binary was called by the
3849 Exim user", but it hasn't, because either the -D option set macros, or the
3850 -C option set a non-trusted configuration file. There are two possibilities:
3852 (1) If deliver_drop_privilege is set, Exim is not going to re-exec in order
3853 to do message deliveries. Thus, the fact that it is running as a
3854 non-privileged user is plausible, and might be wanted in some special
3855 configurations. However, really_exim will have been set false when
3856 privilege was dropped, to stop Exim trying to write to its normal log
3857 files. Therefore, re-enable normal log processing, assuming the sysadmin
3858 has set up the log directory correctly.
3860 (2) If deliver_drop_privilege is not set, the configuration won't work as
3861 apparently intended, and so we log a panic message. In order to retain
3862 root for -C or -D, the caller must either be root or be invoking a
3863 trusted configuration file (when deliver_drop_privilege is false). */
3865 if (removed_privilege && (!trusted_config || macros != NULL) &&
3866 real_uid == exim_uid)
3868 if (deliver_drop_privilege)
3869 really_exim = TRUE; /* let logging work normally */
3871 log_write(0, LOG_MAIN|LOG_PANIC,
3872 "exim user lost privilege for using %s option",
3873 trusted_config? "-D" : "-C");
3876 /* Start up Perl interpreter if Perl support is configured and there is a
3877 perl_startup option, and the configuration or the command line specifies
3878 initializing starting. Note that the global variables are actually called
3879 opt_perl_xxx to avoid clashing with perl's namespace (perl_*). */
3882 if (perl_start_option != 0)
3883 opt_perl_at_start = (perl_start_option > 0);
3884 if (opt_perl_at_start && opt_perl_startup != NULL)
3887 DEBUG(D_any) debug_printf("Starting Perl interpreter\n");
3888 errstr = init_perl(opt_perl_startup);
3891 fprintf(stderr, "exim: error in perl_startup code: %s\n", errstr);
3892 return EXIT_FAILURE;
3894 opt_perl_started = TRUE;
3896 #endif /* EXIM_PERL */
3898 /* Log the arguments of the call if the configuration file said so. This is
3899 a debugging feature for finding out what arguments certain MUAs actually use.
3900 Don't attempt it if logging is disabled, or if listing variables or if
3901 verifying/testing addresses or expansions. */
3903 if (((debug_selector & D_any) != 0 || (log_extra_selector & LX_arguments) != 0)
3904 && really_exim && !list_options && !checking)
3907 uschar *p = big_buffer;
3909 Ustrcpy(p, "cwd= (failed)");
3910 dummy = /* quieten compiler */ getcwd(CS p+4, big_buffer_size - 4);
3912 (void)string_format(p, big_buffer_size - (p - big_buffer), " %d args:", argc);
3914 for (i = 0; i < argc; i++)
3916 int len = Ustrlen(argv[i]);
3919 if (p + len + 8 >= big_buffer + big_buffer_size)
3922 log_write(0, LOG_MAIN, "%s", big_buffer);
3923 Ustrcpy(big_buffer, "...");
3926 printing = string_printing(argv[i]);
3927 if (printing[0] == 0) quote = US"\""; else
3929 uschar *pp = printing;
3931 while (*pp != 0) if (isspace(*pp++)) { quote = US"\""; break; }
3933 sprintf(CS p, " %s%.*s%s", quote, (int)(big_buffer_size -
3934 (p - big_buffer) - 4), printing, quote);
3938 if ((log_extra_selector & LX_arguments) != 0)
3939 log_write(0, LOG_MAIN, "%s", big_buffer);
3941 debug_printf("%s\n", big_buffer);
3944 /* Set the working directory to be the top-level spool directory. We don't rely
3945 on this in the code, which always uses fully qualified names, but it's useful
3946 for core dumps etc. Don't complain if it fails - the spool directory might not
3947 be generally accessible and calls with the -C option (and others) have lost
3948 privilege by now. Before the chdir, we try to ensure that the directory exists.
3951 if (Uchdir(spool_directory) != 0)
3954 (void)directory_make(spool_directory, US"", SPOOL_DIRECTORY_MODE, FALSE);
3955 dummy = /* quieten compiler */ Uchdir(spool_directory);
3958 /* Handle calls with the -bi option. This is a sendmail option to rebuild *the*
3959 alias file. Exim doesn't have such a concept, but this call is screwed into
3960 Sun's YP makefiles. Handle this by calling a configured script, as the real
3961 user who called Exim. The -oA option can be used to pass an argument to the
3966 (void)fclose(config_file);
3967 if (bi_command != NULL)
3971 argv[i++] = bi_command;
3972 if (alias_arg != NULL) argv[i++] = alias_arg;
3975 setgroups(group_count, group_list);
3976 exim_setugid(real_uid, real_gid, FALSE, US"running bi_command");
3978 DEBUG(D_exec) debug_printf("exec %.256s %.256s\n", argv[0],
3979 (argv[1] == NULL)? US"" : argv[1]);
3981 execv(CS argv[0], (char *const *)argv);
3982 fprintf(stderr, "exim: exec failed: %s\n", strerror(errno));
3987 DEBUG(D_any) debug_printf("-bi used but bi_command not set; exiting\n");
3992 /* We moved the admin/trusted check to be immediately after reading the
3993 configuration file. We leave these prints here to ensure that syslog setup,
3994 logfile setup, and so on has already happened. */
3996 if (trusted_caller) DEBUG(D_any) debug_printf("trusted user\n");
3997 if (admin_user) DEBUG(D_any) debug_printf("admin user\n");
3999 /* Only an admin user may start the daemon or force a queue run in the default
4000 configuration, but the queue run restriction can be relaxed. Only an admin
4001 user may request that a message be returned to its sender forthwith. Only an
4002 admin user may specify a debug level greater than D_v (because it might show
4003 passwords, etc. in lookup queries). Only an admin user may request a queue
4004 count. Only an admin user can use the test interface to scan for email
4005 (because Exim will be in the spool dir and able to look at mails). */
4009 BOOL debugset = (debug_selector & ~D_v) != 0;
4010 if (deliver_give_up || daemon_listen || malware_test_file ||
4011 (count_queue && queue_list_requires_admin) ||
4012 (list_queue && queue_list_requires_admin) ||
4013 (queue_interval >= 0 && prod_requires_admin) ||
4014 (debugset && !running_in_test_harness))
4016 fprintf(stderr, "exim:%s permission denied\n", debugset? " debugging" : "");
4021 /* If the real user is not root or the exim uid, the argument for passing
4022 in an open TCP/IP connection for another message is not permitted, nor is
4023 running with the -N option for any delivery action, unless this call to exim is
4024 one that supplied an input message, or we are using a patched exim for
4025 regression testing. */
4027 if (real_uid != root_uid && real_uid != exim_uid &&
4028 (continue_hostname != NULL ||
4030 (queue_interval >= 0 || daemon_listen || msg_action_arg > 0)
4031 )) && !running_in_test_harness)
4033 fprintf(stderr, "exim: Permission denied\n");
4034 return EXIT_FAILURE;
4037 /* If the caller is not trusted, certain arguments are ignored when running for
4038 real, but are permitted when checking things (-be, -bv, -bt, -bh, -bf, -bF).
4039 Note that authority for performing certain actions on messages is tested in the
4040 queue_action() function. */
4042 if (!trusted_caller && !checking && filter_test == FTEST_NONE)
4044 sender_host_name = sender_host_address = interface_address =
4045 sender_ident = received_protocol = NULL;
4046 sender_host_port = interface_port = 0;
4047 sender_host_authenticated = authenticated_sender = authenticated_id = NULL;
4050 /* If a sender host address is set, extract the optional port number off the
4051 end of it and check its syntax. Do the same thing for the interface address.
4052 Exim exits if the syntax is bad. */
4056 if (sender_host_address != NULL)
4057 sender_host_port = check_port(sender_host_address);
4058 if (interface_address != NULL)
4059 interface_port = check_port(interface_address);
4062 /* If the caller is trusted, then they can use -G to suppress_local_fixups. */
4067 suppress_local_fixups = suppress_local_fixups_default = TRUE;
4068 DEBUG(D_acl) debug_printf("suppress_local_fixups forced on by -G\n");
4072 fprintf(stderr, "exim: permission denied (-G requires a trusted user)\n");
4073 return EXIT_FAILURE;
4077 /* If an SMTP message is being received check to see if the standard input is a
4078 TCP/IP socket. If it is, we assume that Exim was called from inetd if the
4079 caller is root or the Exim user, or if the port is a privileged one. Otherwise,
4084 union sockaddr_46 inetd_sock;
4085 EXIM_SOCKLEN_T size = sizeof(inetd_sock);
4086 if (getpeername(0, (struct sockaddr *)(&inetd_sock), &size) == 0)
4088 int family = ((struct sockaddr *)(&inetd_sock))->sa_family;
4089 if (family == AF_INET || family == AF_INET6)
4091 union sockaddr_46 interface_sock;
4092 size = sizeof(interface_sock);
4094 if (getsockname(0, (struct sockaddr *)(&interface_sock), &size) == 0)
4095 interface_address = host_ntoa(-1, &interface_sock, NULL,
4098 if (host_is_tls_on_connect_port(interface_port)) tls_in.on_connect = TRUE;
4100 if (real_uid == root_uid || real_uid == exim_uid || interface_port < 1024)
4103 sender_host_address = host_ntoa(-1, (struct sockaddr *)(&inetd_sock),
4104 NULL, &sender_host_port);
4105 if (mua_wrapper) log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Input from "
4106 "inetd is not supported when mua_wrapper is set");
4111 "exim: Permission denied (unprivileged user, unprivileged port)\n");
4112 return EXIT_FAILURE;
4118 /* If the load average is going to be needed while receiving a message, get it
4119 now for those OS that require the first call to os_getloadavg() to be done as
4120 root. There will be further calls later for each message received. */
4122 #ifdef LOAD_AVG_NEEDS_ROOT
4123 if (receiving_message &&
4124 (queue_only_load >= 0 ||
4125 (is_inetd && smtp_load_reserve >= 0)
4128 load_average = OS_GETLOADAVG();
4132 /* The queue_only configuration option can be overridden by -odx on the command
4133 line, except that if queue_only_override is false, queue_only cannot be unset
4134 from the command line. */
4136 if (queue_only_set && (queue_only_override || arg_queue_only))
4137 queue_only = arg_queue_only;
4139 /* The receive_timeout and smtp_receive_timeout options can be overridden by
4142 if (arg_receive_timeout >= 0) receive_timeout = arg_receive_timeout;
4143 if (arg_smtp_receive_timeout >= 0)
4144 smtp_receive_timeout = arg_smtp_receive_timeout;
4146 /* If Exim was started with root privilege, unless we have already removed the
4147 root privilege above as a result of -C, -D, -be, -bf or -bF, remove it now
4148 except when starting the daemon or doing some kind of delivery or address
4149 testing (-bt). These are the only cases when root need to be retained. We run
4150 as exim for -bv and -bh. However, if deliver_drop_privilege is set, root is
4151 retained only for starting the daemon. We always do the initgroups() in this
4152 situation (controlled by the TRUE below), in order to be as close as possible
4153 to the state Exim usually runs in. */
4155 if (!unprivileged && /* originally had root AND */
4156 !removed_privilege && /* still got root AND */
4157 !daemon_listen && /* not starting the daemon */
4158 queue_interval <= 0 && /* (either kind of daemon) */
4160 deliver_drop_privilege || /* requested unprivileged */
4162 queue_interval < 0 && /* not running the queue */
4163 (msg_action_arg < 0 || /* and */
4164 msg_action != MSG_DELIVER) && /* not delivering and */
4165 (!checking || !address_test_mode) /* not address checking */
4169 exim_setugid(exim_uid, exim_gid, TRUE, US"privilege not needed");
4172 /* When we are retaining a privileged uid, we still change to the exim gid. */
4177 rv = setgid(exim_gid);
4178 /* Impact of failure is that some stuff might end up with an incorrect group.
4179 We track this for failures from root, since any attempt to change privilege
4180 by root should succeed and failures should be examined. For non-root,
4181 there's no security risk. For me, it's { exim -bV } on a just-built binary,
4182 no need to complain then. */
4185 if (!(unprivileged || removed_privilege))
4188 "exim: changing group failed: %s\n", strerror(errno));
4192 DEBUG(D_any) debug_printf("changing group to %ld failed: %s\n",
4193 (long int)exim_gid, strerror(errno));
4197 /* Handle a request to scan a file for malware */
4198 if (malware_test_file)
4200 #ifdef WITH_CONTENT_SCAN
4202 set_process_info("scanning file for malware");
4203 result = malware_in_file(malware_test_file);
4206 printf("No malware found.\n");
4211 printf("Malware lookup returned non-okay/fail: %d\n", result);
4215 printf("Malware found: %s\n", malware_name);
4217 printf("Malware scan detected malware of unknown name.\n");
4219 printf("Malware scanning not enabled at compile time.\n");
4224 /* Handle a request to list the delivery queue */
4228 set_process_info("listing the queue");
4229 queue_list(list_queue_option, argv + recipients_arg, argc - recipients_arg);
4233 /* Handle a request to count the delivery queue */
4237 set_process_info("counting the queue");
4242 /* Handle actions on specific messages, except for the force delivery and
4243 message load actions, which are done below. Some actions take a whole list of
4244 message ids, which are known to continue up to the end of the arguments. Others
4245 take a single message id and then operate on the recipients list. */
4247 if (msg_action_arg > 0 && msg_action != MSG_DELIVER && msg_action != MSG_LOAD)
4249 int yield = EXIT_SUCCESS;
4250 set_process_info("acting on specified messages");
4252 if (!one_msg_action)
4254 for (i = msg_action_arg; i < argc; i++)
4255 if (!queue_action(argv[i], msg_action, NULL, 0, 0))
4256 yield = EXIT_FAILURE;
4259 else if (!queue_action(argv[msg_action_arg], msg_action, argv, argc,
4260 recipients_arg)) yield = EXIT_FAILURE;
4264 /* All the modes below here require the remaining configuration sections
4265 to be read, except that we can skip over the ACL setting when delivering
4266 specific messages, or doing a queue run. (For various testing cases we could
4267 skip too, but as they are rare, it doesn't really matter.) The argument is TRUE
4270 readconf_rest(msg_action_arg > 0 || (queue_interval == 0 && !daemon_listen));
4272 /* The configuration data will have been read into POOL_PERM because we won't
4273 ever want to reset back past it. Change the current pool to POOL_MAIN. In fact,
4274 this is just a bit of pedantic tidiness. It wouldn't really matter if the
4275 configuration were read into POOL_MAIN, because we don't do any resets till
4276 later on. However, it seems right, and it does ensure that both pools get used.
4279 store_pool = POOL_MAIN;
4281 /* Handle the -brt option. This is for checking out retry configurations.
4282 The next three arguments are a domain name or a complete address, and
4283 optionally two error numbers. All it does is to call the function that
4284 scans the retry configuration data. */
4286 if (test_retry_arg >= 0)
4288 retry_config *yield;
4289 int basic_errno = 0;
4293 if (test_retry_arg >= argc)
4295 printf("-brt needs a domain or address argument\n");
4296 exim_exit(EXIT_FAILURE);
4298 s1 = argv[test_retry_arg++];
4301 /* If the first argument contains no @ and no . it might be a local user
4302 or it might be a single-component name. Treat as a domain. */
4304 if (Ustrchr(s1, '@') == NULL && Ustrchr(s1, '.') == NULL)
4306 printf("Warning: \"%s\" contains no '@' and no '.' characters. It is "
4307 "being \ntreated as a one-component domain, not as a local part.\n\n",
4311 /* There may be an optional second domain arg. */
4313 if (test_retry_arg < argc && Ustrchr(argv[test_retry_arg], '.') != NULL)
4314 s2 = argv[test_retry_arg++];
4316 /* The final arg is an error name */
4318 if (test_retry_arg < argc)
4320 uschar *ss = argv[test_retry_arg];
4322 readconf_retry_error(ss, ss + Ustrlen(ss), &basic_errno, &more_errno);
4325 printf("%s\n", CS error);
4326 return EXIT_FAILURE;
4329 /* For the {MAIL,RCPT,DATA}_4xx errors, a value of 255 means "any", and a
4330 code > 100 as an error is for matching codes to the decade. Turn them into
4331 a real error code, off the decade. */
4333 if (basic_errno == ERRNO_MAIL4XX ||
4334 basic_errno == ERRNO_RCPT4XX ||
4335 basic_errno == ERRNO_DATA4XX)
4337 int code = (more_errno >> 8) & 255;
4339 more_errno = (more_errno & 0xffff00ff) | (21 << 8);
4340 else if (code > 100)
4341 more_errno = (more_errno & 0xffff00ff) | ((code - 96) << 8);
4345 yield = retry_find_config(s1, s2, basic_errno, more_errno);
4346 if (yield == NULL) printf("No retry information found\n"); else
4349 more_errno = yield->more_errno;
4350 printf("Retry rule: %s ", yield->pattern);
4352 if (yield->basic_errno == ERRNO_EXIMQUOTA)
4354 printf("quota%s%s ",
4355 (more_errno > 0)? "_" : "",
4356 (more_errno > 0)? readconf_printtime(more_errno) : US"");
4358 else if (yield->basic_errno == ECONNREFUSED)
4360 printf("refused%s%s ",
4361 (more_errno > 0)? "_" : "",
4362 (more_errno == 'M')? "MX" :
4363 (more_errno == 'A')? "A" : "");
4365 else if (yield->basic_errno == ETIMEDOUT)
4368 if ((more_errno & RTEF_CTOUT) != 0) printf("_connect");
4370 if (more_errno != 0) printf("_%s",
4371 (more_errno == 'M')? "MX" : "A");
4374 else if (yield->basic_errno == ERRNO_AUTHFAIL)
4375 printf("auth_failed ");
4378 for (r = yield->rules; r != NULL; r = r->next)
4380 printf("%c,%s", r->rule, readconf_printtime(r->timeout)); /* Do not */
4381 printf(",%s", readconf_printtime(r->p1)); /* amalgamate */
4387 printf(",%d.", x/1000);
4401 exim_exit(EXIT_SUCCESS);
4404 /* Handle a request to list one or more configuration options */
4405 /* If -n was set, we suppress some information */
4409 set_process_info("listing variables");
4410 if (recipients_arg >= argc) readconf_print(US"all", NULL, flag_n);
4411 else for (i = recipients_arg; i < argc; i++)
4414 (Ustrcmp(argv[i], "router") == 0 ||
4415 Ustrcmp(argv[i], "transport") == 0 ||
4416 Ustrcmp(argv[i], "authenticator") == 0 ||
4417 Ustrcmp(argv[i], "macro") == 0))
4419 readconf_print(argv[i+1], argv[i], flag_n);
4422 else readconf_print(argv[i], NULL, flag_n);
4424 exim_exit(EXIT_SUCCESS);
4428 /* Handle a request to deliver one or more messages that are already on the
4429 queue. Values of msg_action other than MSG_DELIVER and MSG_LOAD are dealt with
4430 above. MSG_LOAD is handled with -be (which is the only time it applies) below.
4432 Delivery of specific messages is typically used for a small number when
4433 prodding by hand (when the option forced_delivery will be set) or when
4434 re-execing to regain root privilege. Each message delivery must happen in a
4435 separate process, so we fork a process for each one, and run them sequentially
4436 so that debugging output doesn't get intertwined, and to avoid spawning too
4437 many processes if a long list is given. However, don't fork for the last one;
4438 this saves a process in the common case when Exim is called to deliver just one
4441 if (msg_action_arg > 0 && msg_action != MSG_LOAD)
4443 if (prod_requires_admin && !admin_user)
4445 fprintf(stderr, "exim: Permission denied\n");
4446 exim_exit(EXIT_FAILURE);
4448 set_process_info("delivering specified messages");
4449 if (deliver_give_up) forced_delivery = deliver_force_thaw = TRUE;
4450 for (i = msg_action_arg; i < argc; i++)
4455 (void)deliver_message(argv[i], forced_delivery, deliver_give_up);
4456 else if ((pid = fork()) == 0)
4458 (void)deliver_message(argv[i], forced_delivery, deliver_give_up);
4459 _exit(EXIT_SUCCESS);
4463 fprintf(stderr, "failed to fork delivery process for %s: %s\n", argv[i],
4465 exim_exit(EXIT_FAILURE);
4469 exim_exit(EXIT_SUCCESS);
4473 /* If only a single queue run is requested, without SMTP listening, we can just
4474 turn into a queue runner, with an optional starting message id. */
4476 if (queue_interval == 0 && !daemon_listen)
4478 DEBUG(D_queue_run) debug_printf("Single queue run%s%s%s%s\n",
4479 (start_queue_run_id == NULL)? US"" : US" starting at ",
4480 (start_queue_run_id == NULL)? US"" : start_queue_run_id,
4481 (stop_queue_run_id == NULL)? US"" : US" stopping at ",
4482 (stop_queue_run_id == NULL)? US"" : stop_queue_run_id);
4483 set_process_info("running the queue (single queue run)");
4484 queue_run(start_queue_run_id, stop_queue_run_id, FALSE);
4485 exim_exit(EXIT_SUCCESS);
4489 /* Find the login name of the real user running this process. This is always
4490 needed when receiving a message, because it is written into the spool file. It
4491 may also be used to construct a from: or a sender: header, and in this case we
4492 need the user's full name as well, so save a copy of it, checked for RFC822
4493 syntax and munged if necessary, if it hasn't previously been set by the -F
4494 argument. We may try to get the passwd entry more than once, in case NIS or
4495 other delays are in evidence. Save the home directory for use in filter testing
4500 if ((pw = getpwuid(real_uid)) != NULL)
4502 originator_login = string_copy(US pw->pw_name);
4503 originator_home = string_copy(US pw->pw_dir);
4505 /* If user name has not been set by -F, set it from the passwd entry
4506 unless -f has been used to set the sender address by a trusted user. */
4508 if (originator_name == NULL)
4510 if (sender_address == NULL ||
4511 (!trusted_caller && filter_test == FTEST_NONE))
4513 uschar *name = US pw->pw_gecos;
4514 uschar *amp = Ustrchr(name, '&');
4517 /* Most Unix specify that a '&' character in the gecos field is
4518 replaced by a copy of the login name, and some even specify that
4519 the first character should be upper cased, so that's what we do. */
4524 string_format(buffer, sizeof(buffer), "%.*s%n%s%s",
4525 amp - name, name, &loffset, originator_login, amp + 1);
4526 buffer[loffset] = toupper(buffer[loffset]);
4530 /* If a pattern for matching the gecos field was supplied, apply
4531 it and then expand the name string. */
4533 if (gecos_pattern != NULL && gecos_name != NULL)
4536 re = regex_must_compile(gecos_pattern, FALSE, TRUE); /* Use malloc */
4538 if (regex_match_and_setup(re, name, 0, -1))
4540 uschar *new_name = expand_string(gecos_name);
4542 if (new_name != NULL)
4544 DEBUG(D_receive) debug_printf("user name \"%s\" extracted from "
4545 "gecos field \"%s\"\n", new_name, name);
4548 else DEBUG(D_receive) debug_printf("failed to expand gecos_name string "
4549 "\"%s\": %s\n", gecos_name, expand_string_message);
4551 else DEBUG(D_receive) debug_printf("gecos_pattern \"%s\" did not match "
4552 "gecos field \"%s\"\n", gecos_pattern, name);
4553 store_free((void *)re);
4555 originator_name = string_copy(name);
4558 /* A trusted caller has used -f but not -F */
4560 else originator_name = US"";
4563 /* Break the retry loop */
4568 if (++i > finduser_retries) break;
4572 /* If we cannot get a user login, log the incident and give up, unless the
4573 configuration specifies something to use. When running in the test harness,
4574 any setting of unknown_login overrides the actual name. */
4576 if (originator_login == NULL || running_in_test_harness)
4578 if (unknown_login != NULL)
4580 originator_login = expand_string(unknown_login);
4581 if (originator_name == NULL && unknown_username != NULL)
4582 originator_name = expand_string(unknown_username);
4583 if (originator_name == NULL) originator_name = US"";
4585 if (originator_login == NULL)
4586 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Failed to get user name for uid %d",
4590 /* Ensure that the user name is in a suitable form for use as a "phrase" in an
4593 originator_name = string_copy(parse_fix_phrase(originator_name,
4594 Ustrlen(originator_name), big_buffer, big_buffer_size));
4596 /* If a message is created by this call of Exim, the uid/gid of its originator
4597 are those of the caller. These values are overridden if an existing message is
4598 read in from the spool. */
4600 originator_uid = real_uid;
4601 originator_gid = real_gid;
4603 DEBUG(D_receive) debug_printf("originator: uid=%d gid=%d login=%s name=%s\n",
4604 (int)originator_uid, (int)originator_gid, originator_login, originator_name);
4606 /* Run in daemon and/or queue-running mode. The function daemon_go() never
4607 returns. We leave this till here so that the originator_ fields are available
4608 for incoming messages via the daemon. The daemon cannot be run in mua_wrapper
4611 if (daemon_listen || inetd_wait_mode || queue_interval > 0)
4615 fprintf(stderr, "Daemon cannot be run when mua_wrapper is set\n");
4616 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Daemon cannot be run when "
4617 "mua_wrapper is set");
4622 /* If the sender ident has not been set (by a trusted caller) set it to
4623 the caller. This will get overwritten below for an inetd call. If a trusted
4624 caller has set it empty, unset it. */
4626 if (sender_ident == NULL) sender_ident = originator_login;
4627 else if (sender_ident[0] == 0) sender_ident = NULL;
4629 /* Handle the -brw option, which is for checking out rewriting rules. Cause log
4630 writes (on errors) to go to stderr instead. Can't do this earlier, as want the
4631 originator_* variables set. */
4633 if (test_rewrite_arg >= 0)
4635 really_exim = FALSE;
4636 if (test_rewrite_arg >= argc)
4638 printf("-brw needs an address argument\n");
4639 exim_exit(EXIT_FAILURE);
4641 rewrite_test(argv[test_rewrite_arg]);
4642 exim_exit(EXIT_SUCCESS);
4645 /* A locally-supplied message is considered to be coming from a local user
4646 unless a trusted caller supplies a sender address with -f, or is passing in the
4647 message via SMTP (inetd invocation or otherwise). */
4649 if ((sender_address == NULL && !smtp_input) ||
4650 (!trusted_caller && filter_test == FTEST_NONE))
4652 sender_local = TRUE;
4654 /* A trusted caller can supply authenticated_sender and authenticated_id
4655 via -oMas and -oMai and if so, they will already be set. Otherwise, force
4656 defaults except when host checking. */
4658 if (authenticated_sender == NULL && !host_checking)
4659 authenticated_sender = string_sprintf("%s@%s", originator_login,
4660 qualify_domain_sender);
4661 if (authenticated_id == NULL && !host_checking)
4662 authenticated_id = originator_login;
4665 /* Trusted callers are always permitted to specify the sender address.
4666 Untrusted callers may specify it if it matches untrusted_set_sender, or if what
4667 is specified is the empty address. However, if a trusted caller does not
4668 specify a sender address for SMTP input, we leave sender_address unset. This
4669 causes the MAIL commands to be honoured. */
4671 if ((!smtp_input && sender_address == NULL) ||
4672 !receive_check_set_sender(sender_address))
4674 /* Either the caller is not permitted to set a general sender, or this is
4675 non-SMTP input and the trusted caller has not set a sender. If there is no
4676 sender, or if a sender other than <> is set, override with the originator's
4677 login (which will get qualified below), except when checking things. */
4679 if (sender_address == NULL /* No sender_address set */
4681 (sender_address[0] != 0 && /* Non-empty sender address, AND */
4682 !checking && /* Not running tests, AND */
4683 filter_test == FTEST_NONE)) /* Not testing a filter */
4685 sender_address = originator_login;
4686 sender_address_forced = FALSE;
4687 sender_address_domain = 0;
4691 /* Remember whether an untrusted caller set the sender address */
4693 sender_set_untrusted = sender_address != originator_login && !trusted_caller;
4695 /* Ensure that the sender address is fully qualified unless it is the empty
4696 address, which indicates an error message, or doesn't exist (root caller, smtp
4697 interface, no -f argument). */
4699 if (sender_address != NULL && sender_address[0] != 0 &&
4700 sender_address_domain == 0)
4701 sender_address = string_sprintf("%s@%s", local_part_quote(sender_address),
4702 qualify_domain_sender);
4704 DEBUG(D_receive) debug_printf("sender address = %s\n", sender_address);
4706 /* Handle a request to verify a list of addresses, or test them for delivery.
4707 This must follow the setting of the sender address, since routers can be
4708 predicated upon the sender. If no arguments are given, read addresses from
4709 stdin. Set debug_level to at least D_v to get full output for address testing.
4712 if (verify_address_mode || address_test_mode)
4715 int flags = vopt_qualify;
4717 if (verify_address_mode)
4719 if (!verify_as_sender) flags |= vopt_is_recipient;
4720 DEBUG(D_verify) debug_print_ids(US"Verifying:");
4725 flags |= vopt_is_recipient;
4726 debug_selector |= D_v;
4727 debug_file = stderr;
4728 debug_fd = fileno(debug_file);
4729 DEBUG(D_verify) debug_print_ids(US"Address testing:");
4732 if (recipients_arg < argc)
4734 while (recipients_arg < argc)
4736 uschar *s = argv[recipients_arg++];
4739 BOOL finished = FALSE;
4740 uschar *ss = parse_find_address_end(s, FALSE);
4741 if (*ss == ',') *ss = 0; else finished = TRUE;
4742 test_address(s, flags, &exit_value);
4745 while (*(++s) != 0 && (*s == ',' || isspace(*s)));
4752 uschar *s = get_stdinput(NULL, NULL);
4753 if (s == NULL) break;
4754 test_address(s, flags, &exit_value);
4758 exim_exit(exit_value);
4761 /* Handle expansion checking. Either expand items on the command line, or read
4762 from stdin if there aren't any. If -Mset was specified, load the message so
4763 that its variables can be used, but restrict this facility to admin users.
4764 Otherwise, if -bem was used, read a message from stdin. */
4768 if (msg_action_arg > 0 && msg_action == MSG_LOAD)
4770 uschar spoolname[256]; /* Not big_buffer; used in spool_read_header() */
4773 fprintf(stderr, "exim: permission denied\n");
4776 message_id = argv[msg_action_arg];
4777 (void)string_format(spoolname, sizeof(spoolname), "%s-H", message_id);
4778 if (!spool_open_datafile(message_id))
4779 printf ("Failed to load message datafile %s\n", message_id);
4780 if (spool_read_header(spoolname, TRUE, FALSE) != spool_read_OK)
4781 printf ("Failed to load message %s\n", message_id);
4784 /* Read a test message from a file. We fudge it up to be on stdin, saving
4785 stdin itself for later reading of expansion strings. */
4787 else if (expansion_test_message != NULL)
4789 int save_stdin = dup(0);
4790 int fd = Uopen(expansion_test_message, O_RDONLY, 0);
4793 fprintf(stderr, "exim: failed to open %s: %s\n", expansion_test_message,
4795 return EXIT_FAILURE;
4798 filter_test = FTEST_USER; /* Fudge to make it look like filter test */
4799 message_ended = END_NOTENDED;
4800 read_message_body(receive_msg(extract_recipients));
4801 message_linecount += body_linecount;
4802 (void)dup2(save_stdin, 0);
4803 (void)close(save_stdin);
4804 clearerr(stdin); /* Required by Darwin */
4807 /* Allow $recipients for this testing */
4809 enable_dollar_recipients = TRUE;
4811 /* Expand command line items */
4813 if (recipients_arg < argc)
4815 while (recipients_arg < argc)
4817 uschar *s = argv[recipients_arg++];
4818 uschar *ss = expand_string(s);
4819 if (ss == NULL) printf ("Failed: %s\n", expand_string_message);
4820 else printf("%s\n", CS ss);
4828 char *(*fn_readline)(const char *) = NULL;
4829 void (*fn_addhist)(const char *) = NULL;
4832 void *dlhandle = set_readline(&fn_readline, &fn_addhist);
4838 uschar *source = get_stdinput(fn_readline, fn_addhist);
4839 if (source == NULL) break;
4840 ss = expand_string(source);
4842 printf ("Failed: %s\n", expand_string_message);
4843 else printf("%s\n", CS ss);
4847 if (dlhandle != NULL) dlclose(dlhandle);
4851 /* The data file will be open after -Mset */
4853 if (deliver_datafile >= 0)
4855 (void)close(deliver_datafile);
4856 deliver_datafile = -1;
4859 exim_exit(EXIT_SUCCESS);
4863 /* The active host name is normally the primary host name, but it can be varied
4864 for hosts that want to play several parts at once. We need to ensure that it is
4865 set for host checking, and for receiving messages. */
4867 smtp_active_hostname = primary_hostname;
4868 if (raw_active_hostname != NULL)
4870 uschar *nah = expand_string(raw_active_hostname);
4873 if (!expand_string_forcedfail)
4874 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to expand \"%s\" "
4875 "(smtp_active_hostname): %s", raw_active_hostname,
4876 expand_string_message);
4878 else if (nah[0] != 0) smtp_active_hostname = nah;
4881 /* Handle host checking: this facility mocks up an incoming SMTP call from a
4882 given IP address so that the blocking and relay configuration can be tested.
4883 Unless a sender_ident was set by -oMt, we discard it (the default is the
4884 caller's login name). An RFC 1413 call is made only if we are running in the
4885 test harness and an incoming interface and both ports are specified, because
4886 there is no TCP/IP call to find the ident for. */
4893 if (!sender_ident_set)
4895 sender_ident = NULL;
4896 if (running_in_test_harness && sender_host_port != 0 &&
4897 interface_address != NULL && interface_port != 0)
4898 verify_get_ident(1413);
4901 /* In case the given address is a non-canonical IPv6 address, canonicize
4902 it. The code works for both IPv4 and IPv6, as it happens. */
4904 size = host_aton(sender_host_address, x);
4905 sender_host_address = store_get(48); /* large enough for full IPv6 */
4906 (void)host_nmtoa(size, x, -1, sender_host_address, ':');
4908 /* Now set up for testing */
4910 host_build_sender_fullhost();
4914 sender_local = FALSE;
4915 sender_host_notsocket = TRUE;
4916 debug_file = stderr;
4917 debug_fd = fileno(debug_file);
4918 fprintf(stdout, "\n**** SMTP testing session as if from host %s\n"
4919 "**** but without any ident (RFC 1413) callback.\n"
4920 "**** This is not for real!\n\n",
4921 sender_host_address);
4923 if (verify_check_host(&hosts_connection_nolog) == OK)
4924 log_write_selector &= ~L_smtp_connection;
4925 log_write(L_smtp_connection, LOG_MAIN, "%s", smtp_get_connection_info());
4927 /* NOTE: We do *not* call smtp_log_no_mail() if smtp_start_session() fails,
4928 because a log line has already been written for all its failure exists
4929 (usually "connection refused: <reason>") and writing another one is
4930 unnecessary clutter. */
4932 if (smtp_start_session())
4934 reset_point = store_get(0);
4937 store_reset(reset_point);
4938 if (smtp_setup_msg() <= 0) break;
4939 if (!receive_msg(FALSE)) break;
4943 exim_exit(EXIT_SUCCESS);
4947 /* Arrange for message reception if recipients or SMTP were specified;
4948 otherwise complain unless a version print (-bV) happened or this is a filter
4949 verification test or info dump.
4950 In the former case, show the configuration file name. */
4952 if (recipients_arg >= argc && !extract_recipients && !smtp_input)
4954 if (version_printed)
4956 printf("Configuration file is %s\n", config_main_filename);
4957 return EXIT_SUCCESS;
4960 if (info_flag != CMDINFO_NONE)
4962 show_exim_information(info_flag, info_stdout ? stdout : stderr);
4963 return info_stdout ? EXIT_SUCCESS : EXIT_FAILURE;
4966 if (filter_test == FTEST_NONE)
4967 exim_usage(called_as);
4971 /* If mua_wrapper is set, Exim is being used to turn an MUA that submits on the
4972 standard input into an MUA that submits to a smarthost over TCP/IP. We know
4973 that we are not called from inetd, because that is rejected above. The
4974 following configuration settings are forced here:
4976 (1) Synchronous delivery (-odi)
4977 (2) Errors to stderr (-oep == -oeq)
4978 (3) No parallel remote delivery
4979 (4) Unprivileged delivery
4981 We don't force overall queueing options because there are several of them;
4982 instead, queueing is avoided below when mua_wrapper is set. However, we do need
4983 to override any SMTP queueing. */
4987 synchronous_delivery = TRUE;
4988 arg_error_handling = ERRORS_STDERR;
4989 remote_max_parallel = 1;
4990 deliver_drop_privilege = TRUE;
4992 queue_smtp_domains = NULL;
4996 /* Prepare to accept one or more new messages on the standard input. When a
4997 message has been read, its id is returned in message_id[]. If doing immediate
4998 delivery, we fork a delivery process for each received message, except for the
4999 last one, where we can save a process switch.
5001 It is only in non-smtp mode that error_handling is allowed to be changed from
5002 its default of ERRORS_SENDER by argument. (Idle thought: are any of the
5003 sendmail error modes other than -oem ever actually used? Later: yes.) */
5005 if (!smtp_input) error_handling = arg_error_handling;
5007 /* If this is an inetd call, ensure that stderr is closed to prevent panic
5008 logging being sent down the socket and make an identd call to get the
5013 (void)fclose(stderr);
5014 exim_nullstd(); /* Re-open to /dev/null */
5015 verify_get_ident(IDENT_PORT);
5016 host_build_sender_fullhost();
5017 set_process_info("handling incoming connection from %s via inetd",
5021 /* If the sender host address has been set, build sender_fullhost if it hasn't
5022 already been done (which it will have been for inetd). This caters for the
5023 case when it is forced by -oMa. However, we must flag that it isn't a socket,
5024 so that the test for IP options is skipped for -bs input. */
5026 if (sender_host_address != NULL && sender_fullhost == NULL)
5028 host_build_sender_fullhost();
5029 set_process_info("handling incoming connection from %s via -oMa",
5031 sender_host_notsocket = TRUE;
5034 /* Otherwise, set the sender host as unknown except for inetd calls. This
5035 prevents host checking in the case of -bs not from inetd and also for -bS. */
5037 else if (!is_inetd) sender_host_unknown = TRUE;
5039 /* If stdout does not exist, then dup stdin to stdout. This can happen
5040 if exim is started from inetd. In this case fd 0 will be set to the socket,
5041 but fd 1 will not be set. This also happens for passed SMTP channels. */
5043 if (fstat(1, &statbuf) < 0) (void)dup2(0, 1);
5045 /* Set up the incoming protocol name and the state of the program. Root is
5046 allowed to force received protocol via the -oMr option above. If we have come
5047 via inetd, the process info has already been set up. We don't set
5048 received_protocol here for smtp input, as it varies according to
5049 batch/HELO/EHLO/AUTH/TLS. */
5053 if (!is_inetd) set_process_info("accepting a local %sSMTP message from <%s>",
5054 smtp_batched_input? "batched " : "",
5055 (sender_address!= NULL)? sender_address : originator_login);
5059 if (received_protocol == NULL)
5060 received_protocol = string_sprintf("local%s", called_as);
5061 set_process_info("accepting a local non-SMTP message from <%s>",
5065 /* Initialize the session_local_queue-only flag (this will be ignored if
5066 mua_wrapper is set) */
5069 session_local_queue_only = queue_only;
5071 /* For non-SMTP and for batched SMTP input, check that there is enough space on
5072 the spool if so configured. On failure, we must not attempt to send an error
5073 message! (For interactive SMTP, the check happens at MAIL FROM and an SMTP
5074 error code is given.) */
5076 if ((!smtp_input || smtp_batched_input) && !receive_check_fs(0))
5078 fprintf(stderr, "exim: insufficient disk space\n");
5079 return EXIT_FAILURE;
5082 /* If this is smtp input of any kind, real or batched, handle the start of the
5085 NOTE: We do *not* call smtp_log_no_mail() if smtp_start_session() fails,
5086 because a log line has already been written for all its failure exists
5087 (usually "connection refused: <reason>") and writing another one is
5088 unnecessary clutter. */
5094 if (verify_check_host(&hosts_connection_nolog) == OK)
5095 log_write_selector &= ~L_smtp_connection;
5096 log_write(L_smtp_connection, LOG_MAIN, "%s", smtp_get_connection_info());
5097 if (!smtp_start_session())
5100 exim_exit(EXIT_SUCCESS);
5104 /* Otherwise, set up the input size limit here. */
5108 thismessage_size_limit = expand_string_integer(message_size_limit, TRUE);
5109 if (expand_string_message != NULL)
5111 if (thismessage_size_limit == -1)
5112 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to expand "
5113 "message_size_limit: %s", expand_string_message);
5115 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "invalid value for "
5116 "message_size_limit: %s", expand_string_message);
5120 /* Loop for several messages when reading SMTP input. If we fork any child
5121 processes, we don't want to wait for them unless synchronous delivery is
5122 requested, so set SIGCHLD to SIG_IGN in that case. This is not necessarily the
5123 same as SIG_DFL, despite the fact that documentation often lists the default as
5124 "ignore". This is a confusing area. This is what I know:
5126 At least on some systems (e.g. Solaris), just setting SIG_IGN causes child
5127 processes that complete simply to go away without ever becoming defunct. You
5128 can't then wait for them - but we don't want to wait for them in the
5129 non-synchronous delivery case. However, this behaviour of SIG_IGN doesn't
5130 happen for all OS (e.g. *BSD is different).
5132 But that's not the end of the story. Some (many? all?) systems have the
5133 SA_NOCLDWAIT option for sigaction(). This requests the behaviour that Solaris
5134 has by default, so it seems that the difference is merely one of default
5135 (compare restarting vs non-restarting signals).
5137 To cover all cases, Exim sets SIG_IGN with SA_NOCLDWAIT here if it can. If not,
5138 it just sets SIG_IGN. To be on the safe side it also calls waitpid() at the end
5139 of the loop below. Paranoia rules.
5141 February 2003: That's *still* not the end of the story. There are now versions
5142 of Linux (where SIG_IGN does work) that are picky. If, having set SIG_IGN, a
5143 process then calls waitpid(), a grumble is written to the system log, because
5144 this is logically inconsistent. In other words, it doesn't like the paranoia.
5145 As a consequenc of this, the waitpid() below is now excluded if we are sure
5146 that SIG_IGN works. */
5148 if (!synchronous_delivery)
5151 struct sigaction act;
5152 act.sa_handler = SIG_IGN;
5153 sigemptyset(&(act.sa_mask));
5154 act.sa_flags = SA_NOCLDWAIT;
5155 sigaction(SIGCHLD, &act, NULL);
5157 signal(SIGCHLD, SIG_IGN);
5161 /* Save the current store pool point, for resetting at the start of
5162 each message, and save the real sender address, if any. */
5164 reset_point = store_get(0);
5165 real_sender_address = sender_address;
5167 /* Loop to receive messages; receive_msg() returns TRUE if there are more
5168 messages to be read (SMTP input), or FALSE otherwise (not SMTP, or SMTP channel
5173 store_reset(reset_point);
5176 /* Handle the SMTP case; call smtp_setup_mst() to deal with the initial SMTP
5177 input and build the recipients list, before calling receive_msg() to read the
5178 message proper. Whatever sender address is given in the SMTP transaction is
5179 often ignored for local senders - we use the actual sender, which is normally
5180 either the underlying user running this process or a -f argument provided by
5181 a trusted caller. It is saved in real_sender_address. The test for whether to
5182 accept the SMTP sender is encapsulated in receive_check_set_sender(). */
5187 if ((rc = smtp_setup_msg()) > 0)
5189 if (real_sender_address != NULL &&
5190 !receive_check_set_sender(sender_address))
5192 sender_address = raw_sender = real_sender_address;
5193 sender_address_unrewritten = NULL;
5196 /* For batched SMTP, we have to run the acl_not_smtp_start ACL, since it
5197 isn't really SMTP, so no other ACL will run until the acl_not_smtp one at
5198 the very end. The result of the ACL is ignored (as for other non-SMTP
5199 messages). It is run for its potential side effects. */
5201 if (smtp_batched_input && acl_not_smtp_start != NULL)
5203 uschar *user_msg, *log_msg;
5204 enable_dollar_recipients = TRUE;
5205 (void)acl_check(ACL_WHERE_NOTSMTP_START, NULL, acl_not_smtp_start,
5206 &user_msg, &log_msg);
5207 enable_dollar_recipients = FALSE;
5210 /* Now get the data for the message */
5212 more = receive_msg(extract_recipients);
5213 if (message_id[0] == 0)
5216 smtp_log_no_mail(); /* Log no mail if configured */
5217 exim_exit(EXIT_FAILURE);
5222 smtp_log_no_mail(); /* Log no mail if configured */
5223 exim_exit((rc == 0)? EXIT_SUCCESS : EXIT_FAILURE);
5227 /* In the non-SMTP case, we have all the information from the command
5228 line, but must process it in case it is in the more general RFC822
5229 format, and in any case, to detect syntax errors. Also, it appears that
5230 the use of comma-separated lists as single arguments is common, so we
5231 had better support them. */
5237 int count = argc - recipients_arg;
5238 uschar **list = argv + recipients_arg;
5240 /* These options cannot be changed dynamically for non-SMTP messages */
5242 active_local_sender_retain = local_sender_retain;
5243 active_local_from_check = local_from_check;
5245 /* Save before any rewriting */
5247 raw_sender = string_copy(sender_address);
5249 /* Loop for each argument */
5251 for (i = 0; i < count; i++)
5253 int start, end, domain;
5255 uschar *s = list[i];
5257 /* Loop for each comma-separated address */
5261 BOOL finished = FALSE;
5263 uschar *ss = parse_find_address_end(s, FALSE);
5265 if (*ss == ',') *ss = 0; else finished = TRUE;
5267 /* Check max recipients - if -t was used, these aren't recipients */
5269 if (recipients_max > 0 && ++rcount > recipients_max &&
5270 !extract_recipients)
5272 if (error_handling == ERRORS_STDERR)
5274 fprintf(stderr, "exim: too many recipients\n");
5275 exim_exit(EXIT_FAILURE);
5280 moan_to_sender(ERRMESS_TOOMANYRECIP, NULL, NULL, stdin, TRUE)?
5281 errors_sender_rc : EXIT_FAILURE;
5286 parse_extract_address(s, &errmess, &start, &end, &domain, FALSE);
5288 if (domain == 0 && !allow_unqualified_recipient)
5291 errmess = US"unqualified recipient address not allowed";
5294 if (recipient == NULL)
5296 if (error_handling == ERRORS_STDERR)
5298 fprintf(stderr, "exim: bad recipient address \"%s\": %s\n",
5299 string_printing(list[i]), errmess);
5300 exim_exit(EXIT_FAILURE);
5306 eblock.text1 = string_printing(list[i]);
5307 eblock.text2 = errmess;
5309 moan_to_sender(ERRMESS_BADARGADDRESS, &eblock, NULL, stdin, TRUE)?
5310 errors_sender_rc : EXIT_FAILURE;
5314 receive_add_recipient(recipient, -1);
5317 while (*(++s) != 0 && (*s == ',' || isspace(*s)));
5321 /* Show the recipients when debugging */
5326 if (sender_address != NULL) debug_printf("Sender: %s\n", sender_address);
5327 if (recipients_list != NULL)
5329 debug_printf("Recipients:\n");
5330 for (i = 0; i < recipients_count; i++)
5331 debug_printf(" %s\n", recipients_list[i].address);
5335 /* Run the acl_not_smtp_start ACL if required. The result of the ACL is
5336 ignored; rejecting here would just add complication, and it can just as
5337 well be done later. Allow $recipients to be visible in the ACL. */
5339 if (acl_not_smtp_start != NULL)
5341 uschar *user_msg, *log_msg;
5342 enable_dollar_recipients = TRUE;
5343 (void)acl_check(ACL_WHERE_NOTSMTP_START, NULL, acl_not_smtp_start,
5344 &user_msg, &log_msg);
5345 enable_dollar_recipients = FALSE;
5348 /* Read the data for the message. If filter_test is not FTEST_NONE, this
5349 will just read the headers for the message, and not write anything onto the
5352 message_ended = END_NOTENDED;
5353 more = receive_msg(extract_recipients);
5355 /* more is always FALSE here (not SMTP message) when reading a message
5356 for real; when reading the headers of a message for filter testing,
5357 it is TRUE if the headers were terminated by '.' and FALSE otherwise. */
5359 if (message_id[0] == 0) exim_exit(EXIT_FAILURE);
5360 } /* Non-SMTP message reception */
5362 /* If this is a filter testing run, there are headers in store, but
5363 no message on the spool. Run the filtering code in testing mode, setting
5364 the domain to the qualify domain and the local part to the current user,
5365 unless they have been set by options. The prefix and suffix are left unset
5366 unless specified. The the return path is set to to the sender unless it has
5367 already been set from a return-path header in the message. */
5369 if (filter_test != FTEST_NONE)
5371 deliver_domain = (ftest_domain != NULL)?
5372 ftest_domain : qualify_domain_recipient;
5373 deliver_domain_orig = deliver_domain;
5374 deliver_localpart = (ftest_localpart != NULL)?
5375 ftest_localpart : originator_login;
5376 deliver_localpart_orig = deliver_localpart;
5377 deliver_localpart_prefix = ftest_prefix;
5378 deliver_localpart_suffix = ftest_suffix;
5379 deliver_home = originator_home;
5381 if (return_path == NULL)
5383 printf("Return-path copied from sender\n");
5384 return_path = string_copy(sender_address);
5388 printf("Return-path = %s\n", (return_path[0] == 0)? US"<>" : return_path);
5390 printf("Sender = %s\n", (sender_address[0] == 0)? US"<>" : sender_address);
5392 receive_add_recipient(
5393 string_sprintf("%s%s%s@%s",
5394 (ftest_prefix == NULL)? US"" : ftest_prefix,
5396 (ftest_suffix == NULL)? US"" : ftest_suffix,
5397 deliver_domain), -1);
5399 printf("Recipient = %s\n", recipients_list[0].address);
5400 if (ftest_prefix != NULL) printf("Prefix = %s\n", ftest_prefix);
5401 if (ftest_suffix != NULL) printf("Suffix = %s\n", ftest_suffix);
5403 if (chdir("/")) /* Get away from wherever the user is running this from */
5405 DEBUG(D_receive) debug_printf("chdir(\"/\") failed\n");
5406 exim_exit(EXIT_FAILURE);
5409 /* Now we run either a system filter test, or a user filter test, or both.
5410 In the latter case, headers added by the system filter will persist and be
5411 available to the user filter. We need to copy the filter variables
5414 if ((filter_test & FTEST_SYSTEM) != 0)
5416 if (!filter_runtest(filter_sfd, filter_test_sfile, TRUE, more))
5417 exim_exit(EXIT_FAILURE);
5420 memcpy(filter_sn, filter_n, sizeof(filter_sn));
5422 if ((filter_test & FTEST_USER) != 0)
5424 if (!filter_runtest(filter_ufd, filter_test_ufile, FALSE, more))
5425 exim_exit(EXIT_FAILURE);
5428 exim_exit(EXIT_SUCCESS);
5431 /* Else act on the result of message reception. We should not get here unless
5432 message_id[0] is non-zero. If queue_only is set, session_local_queue_only
5433 will be TRUE. If it is not, check on the number of messages received in this
5436 if (!session_local_queue_only &&
5437 smtp_accept_queue_per_connection > 0 &&
5438 receive_messagecount > smtp_accept_queue_per_connection)
5440 session_local_queue_only = TRUE;
5441 queue_only_reason = 2;
5444 /* Initialize local_queue_only from session_local_queue_only. If it is false,
5445 and queue_only_load is set, check that the load average is below it. If it is
5446 not, set local_queue_only TRUE. If queue_only_load_latch is true (the
5447 default), we put the whole session into queue_only mode. It then remains this
5448 way for any subsequent messages on the same SMTP connection. This is a
5449 deliberate choice; even though the load average may fall, it doesn't seem
5450 right to deliver later messages on the same call when not delivering earlier
5451 ones. However, there are odd cases where this is not wanted, so this can be
5452 changed by setting queue_only_load_latch false. */
5454 local_queue_only = session_local_queue_only;
5455 if (!local_queue_only && queue_only_load >= 0)
5457 local_queue_only = (load_average = OS_GETLOADAVG()) > queue_only_load;
5458 if (local_queue_only)
5460 queue_only_reason = 3;
5461 if (queue_only_load_latch) session_local_queue_only = TRUE;
5465 /* If running as an MUA wrapper, all queueing options and freezing options
5469 local_queue_only = queue_only_policy = deliver_freeze = FALSE;
5471 /* Log the queueing here, when it will get a message id attached, but
5472 not if queue_only is set (case 0). Case 1 doesn't happen here (too many
5475 if (local_queue_only) switch(queue_only_reason)
5478 log_write(L_delay_delivery,
5479 LOG_MAIN, "no immediate delivery: more than %d messages "
5480 "received in one connection", smtp_accept_queue_per_connection);
5484 log_write(L_delay_delivery,
5485 LOG_MAIN, "no immediate delivery: load average %.2f",
5486 (double)load_average/1000.0);
5490 /* Else do the delivery unless the ACL or local_scan() called for queue only
5491 or froze the message. Always deliver in a separate process. A fork failure is
5492 not a disaster, as the delivery will eventually happen on a subsequent queue
5493 run. The search cache must be tidied before the fork, as the parent will
5494 do it before exiting. The child will trigger a lookup failure and
5495 thereby defer the delivery if it tries to use (for example) a cached ldap
5496 connection that the parent has called unbind on. */
5498 else if (!queue_only_policy && !deliver_freeze)
5503 if ((pid = fork()) == 0)
5506 close_unwanted(); /* Close unwanted file descriptors and TLS */
5507 exim_nullstd(); /* Ensure std{in,out,err} exist */
5509 /* Re-exec Exim if we need to regain privilege (note: in mua_wrapper
5510 mode, deliver_drop_privilege is forced TRUE). */
5512 if (geteuid() != root_uid && !deliver_drop_privilege && !unprivileged)
5514 (void)child_exec_exim(CEE_EXEC_EXIT, FALSE, NULL, FALSE, 2, US"-Mc",
5516 /* Control does not return here. */
5519 /* No need to re-exec */
5521 rc = deliver_message(message_id, FALSE, FALSE);
5523 _exit((!mua_wrapper || rc == DELIVER_MUA_SUCCEEDED)?
5524 EXIT_SUCCESS : EXIT_FAILURE);
5529 log_write(0, LOG_MAIN|LOG_PANIC, "failed to fork automatic delivery "
5530 "process: %s", strerror(errno));
5533 /* In the parent, wait if synchronous delivery is required. This will
5534 always be the case in MUA wrapper mode. */
5536 else if (synchronous_delivery)
5539 while (wait(&status) != pid);
5540 if ((status & 0x00ff) != 0)
5541 log_write(0, LOG_MAIN|LOG_PANIC,
5542 "process %d crashed with signal %d while delivering %s",
5543 (int)pid, status & 0x00ff, message_id);
5544 if (mua_wrapper && (status & 0xffff) != 0) exim_exit(EXIT_FAILURE);
5548 /* The loop will repeat if more is TRUE. If we do not know know that the OS
5549 automatically reaps children (see comments above the loop), clear away any
5550 finished subprocesses here, in case there are lots of messages coming in
5551 from the same source. */
5553 #ifndef SIG_IGN_WORKS
5554 while (waitpid(-1, NULL, WNOHANG) > 0);
5558 exim_exit(EXIT_SUCCESS); /* Never returns */
5559 return 0; /* To stop compiler warning */