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");
819 #ifdef EXPERIMENTAL_OCSP
820 fprintf(f, " Experimental_OCSP");
822 #ifdef EXPERIMENTAL_PRDR
823 fprintf(f, " Experimental_PRDR");
827 fprintf(f, "Lookups (built-in):");
828 #if defined(LOOKUP_LSEARCH) && LOOKUP_LSEARCH!=2
829 fprintf(f, " lsearch wildlsearch nwildlsearch iplsearch");
831 #if defined(LOOKUP_CDB) && LOOKUP_CDB!=2
834 #if defined(LOOKUP_DBM) && LOOKUP_DBM!=2
835 fprintf(f, " dbm dbmjz dbmnz");
837 #if defined(LOOKUP_DNSDB) && LOOKUP_DNSDB!=2
838 fprintf(f, " dnsdb");
840 #if defined(LOOKUP_DSEARCH) && LOOKUP_DSEARCH!=2
841 fprintf(f, " dsearch");
843 #if defined(LOOKUP_IBASE) && LOOKUP_IBASE!=2
844 fprintf(f, " ibase");
846 #if defined(LOOKUP_LDAP) && LOOKUP_LDAP!=2
847 fprintf(f, " ldap ldapdn ldapm");
849 #if defined(LOOKUP_MYSQL) && LOOKUP_MYSQL!=2
850 fprintf(f, " mysql");
852 #if defined(LOOKUP_NIS) && LOOKUP_NIS!=2
853 fprintf(f, " nis nis0");
855 #if defined(LOOKUP_NISPLUS) && LOOKUP_NISPLUS!=2
856 fprintf(f, " nisplus");
858 #if defined(LOOKUP_ORACLE) && LOOKUP_ORACLE!=2
859 fprintf(f, " oracle");
861 #if defined(LOOKUP_PASSWD) && LOOKUP_PASSWD!=2
862 fprintf(f, " passwd");
864 #if defined(LOOKUP_PGSQL) && LOOKUP_PGSQL!=2
865 fprintf(f, " pgsql");
867 #if defined(LOOKUP_SQLITE) && LOOKUP_SQLITE!=2
868 fprintf(f, " sqlite");
870 #if defined(LOOKUP_TESTDB) && LOOKUP_TESTDB!=2
871 fprintf(f, " testdb");
873 #if defined(LOOKUP_WHOSON) && LOOKUP_WHOSON!=2
874 fprintf(f, " whoson");
878 fprintf(f, "Authenticators:");
880 fprintf(f, " cram_md5");
882 #ifdef AUTH_CYRUS_SASL
883 fprintf(f, " cyrus_sasl");
886 fprintf(f, " dovecot");
889 fprintf(f, " gsasl");
891 #ifdef AUTH_HEIMDAL_GSSAPI
892 fprintf(f, " heimdal_gssapi");
894 #ifdef AUTH_PLAINTEXT
895 fprintf(f, " plaintext");
902 fprintf(f, "Routers:");
904 fprintf(f, " accept");
906 #ifdef ROUTER_DNSLOOKUP
907 fprintf(f, " dnslookup");
909 #ifdef ROUTER_IPLITERAL
910 fprintf(f, " ipliteral");
912 #ifdef ROUTER_IPLOOKUP
913 fprintf(f, " iplookup");
915 #ifdef ROUTER_MANUALROUTE
916 fprintf(f, " manualroute");
918 #ifdef ROUTER_QUERYPROGRAM
919 fprintf(f, " queryprogram");
921 #ifdef ROUTER_REDIRECT
922 fprintf(f, " redirect");
926 fprintf(f, "Transports:");
927 #ifdef TRANSPORT_APPENDFILE
928 fprintf(f, " appendfile");
929 #ifdef SUPPORT_MAILDIR
930 fprintf(f, "/maildir");
932 #ifdef SUPPORT_MAILSTORE
933 fprintf(f, "/mailstore");
939 #ifdef TRANSPORT_AUTOREPLY
940 fprintf(f, " autoreply");
942 #ifdef TRANSPORT_LMTP
945 #ifdef TRANSPORT_PIPE
948 #ifdef TRANSPORT_SMTP
953 if (fixed_never_users[0] > 0)
956 fprintf(f, "Fixed never_users: ");
957 for (i = 1; i <= (int)fixed_never_users[0] - 1; i++)
958 fprintf(f, "%d:", (unsigned int)fixed_never_users[i]);
959 fprintf(f, "%d\n", (unsigned int)fixed_never_users[i]);
962 fprintf(f, "Size of off_t: " SIZE_T_FMT "\n", sizeof(off_t));
964 /* Everything else is details which are only worth reporting when debugging.
965 Perhaps the tls_version_report should move into this too. */
970 /* clang defines __GNUC__ (at least, for me) so test for it first */
971 #if defined(__clang__)
972 fprintf(f, "Compiler: CLang [%s]\n", __clang_version__);
973 #elif defined(__GNUC__)
974 fprintf(f, "Compiler: GCC [%s]\n",
978 "? unknown version ?"
982 fprintf(f, "Compiler: <unknown>\n");
986 tls_version_report(f);
989 for (authi = auths_available; *authi->driver_name != '\0'; ++authi) {
990 if (authi->version_report) {
991 (*authi->version_report)(f);
995 /* PCRE_PRERELEASE is either defined and empty or a bare sequence of
996 characters; unless it's an ancient version of PCRE in which case it
998 #ifndef PCRE_PRERELEASE
999 #define PCRE_PRERELEASE
1002 #define EXPAND_AND_QUOTE(X) QUOTE(X)
1003 fprintf(f, "Library version: PCRE: Compile: %d.%d%s\n"
1005 PCRE_MAJOR, PCRE_MINOR,
1006 EXPAND_AND_QUOTE(PCRE_PRERELEASE) "",
1009 #undef EXPAND_AND_QUOTE
1012 for (i = 0; i < lookup_list_count; i++)
1014 if (lookup_list[i]->version_report)
1015 lookup_list[i]->version_report(f);
1018 #ifdef WHITELIST_D_MACROS
1019 fprintf(f, "WHITELIST_D_MACROS: \"%s\"\n", WHITELIST_D_MACROS);
1021 fprintf(f, "WHITELIST_D_MACROS unset\n");
1023 #ifdef TRUSTED_CONFIG_LIST
1024 fprintf(f, "TRUSTED_CONFIG_LIST: \"%s\"\n", TRUSTED_CONFIG_LIST);
1026 fprintf(f, "TRUSTED_CONFIG_LIST unset\n");
1033 /*************************************************
1034 * Show auxiliary information about Exim *
1035 *************************************************/
1038 show_exim_information(enum commandline_info request, FILE *stream)
1045 fprintf(stream, "Oops, something went wrong.\n");
1049 "The -bI: flag takes a string indicating which information to provide.\n"
1050 "If the string is not recognised, you'll get this help (on stderr).\n"
1052 " exim -bI:help this information\n"
1053 " exim -bI:dscp dscp value keywords known\n"
1054 " exim -bI:sieve list of supported sieve extensions, one per line.\n"
1058 for (pp = exim_sieve_extension_list; *pp; ++pp)
1059 fprintf(stream, "%s\n", *pp);
1062 dscp_list_to_stream(stream);
1068 /*************************************************
1069 * Quote a local part *
1070 *************************************************/
1072 /* This function is used when a sender address or a From: or Sender: header
1073 line is being created from the caller's login, or from an authenticated_id. It
1074 applies appropriate quoting rules for a local part.
1076 Argument: the local part
1077 Returns: the local part, quoted if necessary
1081 local_part_quote(uschar *lpart)
1083 BOOL needs_quote = FALSE;
1088 for (t = lpart; !needs_quote && *t != 0; t++)
1090 needs_quote = !isalnum(*t) && strchr("!#$%&'*+-/=?^_`{|}~", *t) == NULL &&
1091 (*t != '.' || t == lpart || t[1] == 0);
1094 if (!needs_quote) return lpart;
1097 yield = string_cat(NULL, &size, &ptr, US"\"", 1);
1101 uschar *nq = US Ustrpbrk(lpart, "\\\"");
1104 yield = string_cat(yield, &size, &ptr, lpart, Ustrlen(lpart));
1107 yield = string_cat(yield, &size, &ptr, lpart, nq - lpart);
1108 yield = string_cat(yield, &size, &ptr, US"\\", 1);
1109 yield = string_cat(yield, &size, &ptr, nq, 1);
1113 yield = string_cat(yield, &size, &ptr, US"\"", 1);
1121 /*************************************************
1122 * Load readline() functions *
1123 *************************************************/
1125 /* This function is called from testing executions that read data from stdin,
1126 but only when running as the calling user. Currently, only -be does this. The
1127 function loads the readline() function library and passes back the functions.
1128 On some systems, it needs the curses library, so load that too, but try without
1129 it if loading fails. All this functionality has to be requested at build time.
1132 fn_readline_ptr pointer to where to put the readline pointer
1133 fn_addhist_ptr pointer to where to put the addhistory function
1135 Returns: the dlopen handle or NULL on failure
1139 set_readline(char * (**fn_readline_ptr)(const char *),
1140 void (**fn_addhist_ptr)(const char *))
1143 void *dlhandle_curses = dlopen("libcurses." DYNLIB_FN_EXT, RTLD_GLOBAL|RTLD_LAZY);
1145 dlhandle = dlopen("libreadline." DYNLIB_FN_EXT, RTLD_GLOBAL|RTLD_NOW);
1146 if (dlhandle_curses != NULL) dlclose(dlhandle_curses);
1148 if (dlhandle != NULL)
1150 /* Checked manual pages; at least in GNU Readline 6.1, the prototypes are:
1151 * char * readline (const char *prompt);
1152 * void add_history (const char *string);
1154 *fn_readline_ptr = (char *(*)(const char*))dlsym(dlhandle, "readline");
1155 *fn_addhist_ptr = (void(*)(const char*))dlsym(dlhandle, "add_history");
1159 DEBUG(D_any) debug_printf("failed to load readline: %s\n", dlerror());
1168 /*************************************************
1169 * Get a line from stdin for testing things *
1170 *************************************************/
1172 /* This function is called when running tests that can take a number of lines
1173 of input (for example, -be and -bt). It handles continuations and trailing
1174 spaces. And prompting and a blank line output on eof. If readline() is in use,
1175 the arguments are non-NULL and provide the relevant functions.
1178 fn_readline readline function or NULL
1179 fn_addhist addhist function or NULL
1181 Returns: pointer to dynamic memory, or NULL at end of file
1185 get_stdinput(char *(*fn_readline)(const char *), void(*fn_addhist)(const char *))
1190 uschar *yield = NULL;
1192 if (fn_readline == NULL) { printf("> "); fflush(stdout); }
1196 uschar buffer[1024];
1200 char *readline_line = NULL;
1201 if (fn_readline != NULL)
1203 if ((readline_line = fn_readline((i > 0)? "":"> ")) == NULL) break;
1204 if (*readline_line != 0 && fn_addhist != NULL) fn_addhist(readline_line);
1205 p = US readline_line;
1210 /* readline() not in use */
1213 if (Ufgets(buffer, sizeof(buffer), stdin) == NULL) break;
1217 /* Handle the line */
1219 ss = p + (int)Ustrlen(p);
1220 while (ss > p && isspace(ss[-1])) ss--;
1224 while (p < ss && isspace(*p)) p++; /* leading space after cont */
1227 yield = string_cat(yield, &size, &ptr, p, ss - p);
1230 if (fn_readline != NULL) free(readline_line);
1233 if (ss == p || yield[ptr-1] != '\\')
1241 if (yield == NULL) printf("\n");
1247 /*************************************************
1248 * Output usage information for the program *
1249 *************************************************/
1251 /* This function is called when there are no recipients
1252 or a specific --help argument was added.
1255 progname information on what name we were called by
1257 Returns: DOES NOT RETURN
1261 exim_usage(uschar *progname)
1264 /* Handle specific program invocation varients */
1265 if (Ustrcmp(progname, US"-mailq") == 0)
1268 "mailq - list the contents of the mail queue\n\n"
1269 "For a list of options, see the Exim documentation.\n");
1273 /* Generic usage - we output this whatever happens */
1275 "Exim is a Mail Transfer Agent. It is normally called by Mail User Agents,\n"
1276 "not directly from a shell command line. Options and/or arguments control\n"
1277 "what it does when called. For a list of options, see the Exim documentation.\n");
1284 /*************************************************
1285 * Validate that the macros given are okay *
1286 *************************************************/
1288 /* Typically, Exim will drop privileges if macros are supplied. In some
1289 cases, we want to not do so.
1291 Arguments: none (macros is a global)
1292 Returns: true if trusted, false otherwise
1296 macros_trusted(void)
1298 #ifdef WHITELIST_D_MACROS
1300 uschar *whitelisted, *end, *p, **whites, **w;
1301 int white_count, i, n;
1303 BOOL prev_char_item, found;
1308 #ifndef WHITELIST_D_MACROS
1312 /* We only trust -D overrides for some invoking users:
1313 root, the exim run-time user, the optional config owner user.
1314 I don't know why config-owner would be needed, but since they can own the
1315 config files anyway, there's no security risk to letting them override -D. */
1316 if ( ! ((real_uid == root_uid)
1317 || (real_uid == exim_uid)
1318 #ifdef CONFIGURE_OWNER
1319 || (real_uid == config_uid)
1323 debug_printf("macros_trusted rejecting macros for uid %d\n", (int) real_uid);
1327 /* Get a list of macros which are whitelisted */
1328 whitelisted = string_copy_malloc(US WHITELIST_D_MACROS);
1329 prev_char_item = FALSE;
1331 for (p = whitelisted; *p != '\0'; ++p)
1333 if (*p == ':' || isspace(*p))
1338 prev_char_item = FALSE;
1341 if (!prev_char_item)
1342 prev_char_item = TRUE;
1349 whites = store_malloc(sizeof(uschar *) * (white_count+1));
1350 for (p = whitelisted, i = 0; (p != end) && (i < white_count); ++p)
1355 if (i == white_count)
1357 while (*p != '\0' && p < end)
1363 /* The list of macros should be very short. Accept the N*M complexity. */
1364 for (m = macros; m != NULL; m = m->next)
1367 for (w = whites; *w; ++w)
1368 if (Ustrcmp(*w, m->name) == 0)
1375 if (m->replacement == NULL)
1377 len = Ustrlen(m->replacement);
1380 n = pcre_exec(regex_whitelisted_macro, NULL, CS m->replacement, len,
1381 0, PCRE_EOPT, NULL, 0);
1384 if (n != PCRE_ERROR_NOMATCH)
1385 debug_printf("macros_trusted checking %s returned %d\n", m->name, n);
1389 DEBUG(D_any) debug_printf("macros_trusted overridden to true by whitelisting\n");
1395 /*************************************************
1396 * Entry point and high-level code *
1397 *************************************************/
1399 /* Entry point for the Exim mailer. Analyse the arguments and arrange to take
1400 the appropriate action. All the necessary functions are present in the one
1401 binary. I originally thought one should split it up, but it turns out that so
1402 much of the apparatus is needed in each chunk that one might as well just have
1403 it all available all the time, which then makes the coding easier as well.
1406 argc count of entries in argv
1407 argv argument strings, with argv[0] being the program name
1409 Returns: EXIT_SUCCESS if terminated successfully
1410 EXIT_FAILURE otherwise, except when a message has been sent
1411 to the sender, and -oee was given
1415 main(int argc, char **cargv)
1417 uschar **argv = USS cargv;
1418 int arg_receive_timeout = -1;
1419 int arg_smtp_receive_timeout = -1;
1420 int arg_error_handling = error_handling;
1421 int filter_sfd = -1;
1422 int filter_ufd = -1;
1425 int list_queue_option = 0;
1427 int msg_action_arg = -1;
1428 int namelen = (argv[0] == NULL)? 0 : Ustrlen(argv[0]);
1429 int queue_only_reason = 0;
1431 int perl_start_option = 0;
1433 int recipients_arg = argc;
1434 int sender_address_domain = 0;
1435 int test_retry_arg = -1;
1436 int test_rewrite_arg = -1;
1437 BOOL arg_queue_only = FALSE;
1438 BOOL bi_option = FALSE;
1439 BOOL checking = FALSE;
1440 BOOL count_queue = FALSE;
1441 BOOL expansion_test = FALSE;
1442 BOOL extract_recipients = FALSE;
1443 BOOL flag_G = FALSE;
1444 BOOL flag_n = FALSE;
1445 BOOL forced_delivery = FALSE;
1446 BOOL f_end_dot = FALSE;
1447 BOOL deliver_give_up = FALSE;
1448 BOOL list_queue = FALSE;
1449 BOOL list_options = FALSE;
1450 BOOL local_queue_only;
1452 BOOL one_msg_action = FALSE;
1453 BOOL queue_only_set = FALSE;
1454 BOOL receiving_message = TRUE;
1455 BOOL sender_ident_set = FALSE;
1456 BOOL session_local_queue_only;
1458 BOOL removed_privilege = FALSE;
1459 BOOL usage_wanted = FALSE;
1460 BOOL verify_address_mode = FALSE;
1461 BOOL verify_as_sender = FALSE;
1462 BOOL version_printed = FALSE;
1463 uschar *alias_arg = NULL;
1464 uschar *called_as = US"";
1465 uschar *cmdline_syslog_name = NULL;
1466 uschar *start_queue_run_id = NULL;
1467 uschar *stop_queue_run_id = NULL;
1468 uschar *expansion_test_message = NULL;
1469 uschar *ftest_domain = NULL;
1470 uschar *ftest_localpart = NULL;
1471 uschar *ftest_prefix = NULL;
1472 uschar *ftest_suffix = NULL;
1473 uschar *malware_test_file = NULL;
1474 uschar *real_sender_address;
1475 uschar *originator_home = US"/";
1480 struct stat statbuf;
1481 pid_t passed_qr_pid = (pid_t)0;
1482 int passed_qr_pipe = -1;
1483 gid_t group_list[NGROUPS_MAX];
1485 /* For the -bI: flag */
1486 enum commandline_info info_flag = CMDINFO_NONE;
1487 BOOL info_stdout = FALSE;
1489 /* Possible options for -R and -S */
1491 static uschar *rsopts[] = { US"f", US"ff", US"r", US"rf", US"rff" };
1493 /* Need to define this in case we need to change the environment in order
1494 to get rid of a bogus time zone. We have to make it char rather than uschar
1495 because some OS define it in /usr/include/unistd.h. */
1497 extern char **environ;
1499 /* If the Exim user and/or group and/or the configuration file owner/group were
1500 defined by ref:name at build time, we must now find the actual uid/gid values.
1501 This is a feature to make the lives of binary distributors easier. */
1503 #ifdef EXIM_USERNAME
1504 if (route_finduser(US EXIM_USERNAME, &pw, &exim_uid))
1508 fprintf(stderr, "exim: refusing to run with uid 0 for \"%s\"\n",
1512 /* If ref:name uses a number as the name, route_finduser() returns
1513 TRUE with exim_uid set and pw coerced to NULL. */
1515 exim_gid = pw->pw_gid;
1516 #ifndef EXIM_GROUPNAME
1520 "exim: ref:name should specify a usercode, not a group.\n"
1521 "exim: can't let you get away with it unless you also specify a group.\n");
1528 fprintf(stderr, "exim: failed to find uid for user name \"%s\"\n",
1534 #ifdef EXIM_GROUPNAME
1535 if (!route_findgroup(US EXIM_GROUPNAME, &exim_gid))
1537 fprintf(stderr, "exim: failed to find gid for group name \"%s\"\n",
1543 #ifdef CONFIGURE_OWNERNAME
1544 if (!route_finduser(US CONFIGURE_OWNERNAME, NULL, &config_uid))
1546 fprintf(stderr, "exim: failed to find uid for user name \"%s\"\n",
1547 CONFIGURE_OWNERNAME);
1552 /* We default the system_filter_user to be the Exim run-time user, as a
1553 sane non-root value. */
1554 system_filter_uid = exim_uid;
1556 #ifdef CONFIGURE_GROUPNAME
1557 if (!route_findgroup(US CONFIGURE_GROUPNAME, &config_gid))
1559 fprintf(stderr, "exim: failed to find gid for group name \"%s\"\n",
1560 CONFIGURE_GROUPNAME);
1565 /* In the Cygwin environment, some initialization needs doing. It is fudged
1566 in by means of this macro. */
1572 /* Check a field which is patched when we are running Exim within its
1573 testing harness; do a fast initial check, and then the whole thing. */
1575 running_in_test_harness =
1576 *running_status == '<' && Ustrcmp(running_status, "<<<testing>>>") == 0;
1578 /* The C standard says that the equivalent of setlocale(LC_ALL, "C") is obeyed
1579 at the start of a program; however, it seems that some environments do not
1580 follow this. A "strange" locale can affect the formatting of timestamps, so we
1583 setlocale(LC_ALL, "C");
1585 /* Set up the default handler for timing using alarm(). */
1587 os_non_restarting_signal(SIGALRM, sigalrm_handler);
1589 /* Ensure we have a buffer for constructing log entries. Use malloc directly,
1590 because store_malloc writes a log entry on failure. */
1592 log_buffer = (uschar *)malloc(LOG_BUFFER_SIZE);
1593 if (log_buffer == NULL)
1595 fprintf(stderr, "exim: failed to get store for log buffer\n");
1599 /* Set log_stderr to stderr, provided that stderr exists. This gets reset to
1600 NULL when the daemon is run and the file is closed. We have to use this
1601 indirection, because some systems don't allow writing to the variable "stderr".
1604 if (fstat(fileno(stderr), &statbuf) >= 0) log_stderr = stderr;
1606 /* Arrange for the PCRE regex library to use our store functions. Note that
1607 the normal calls are actually macros that add additional arguments for
1608 debugging purposes so we have to assign specially constructed functions here.
1609 The default is to use store in the stacking pool, but this is overridden in the
1610 regex_must_compile() function. */
1612 pcre_malloc = function_store_get;
1613 pcre_free = function_dummy_free;
1615 /* Ensure there is a big buffer for temporary use in several places. It is put
1616 in malloc store so that it can be freed for enlargement if necessary. */
1618 big_buffer = store_malloc(big_buffer_size);
1620 /* Set up the handler for the data request signal, and set the initial
1621 descriptive text. */
1623 set_process_info("initializing");
1624 os_restarting_signal(SIGUSR1, usr1_handler);
1626 /* SIGHUP is used to get the daemon to reconfigure. It gets set as appropriate
1627 in the daemon code. For the rest of Exim's uses, we ignore it. */
1629 signal(SIGHUP, SIG_IGN);
1631 /* We don't want to die on pipe errors as the code is written to handle
1632 the write error instead. */
1634 signal(SIGPIPE, SIG_IGN);
1636 /* Under some circumstance on some OS, Exim can get called with SIGCHLD
1637 set to SIG_IGN. This causes subprocesses that complete before the parent
1638 process waits for them not to hang around, so when Exim calls wait(), nothing
1639 is there. The wait() code has been made robust against this, but let's ensure
1640 that SIGCHLD is set to SIG_DFL, because it's tidier to wait and get a process
1641 ending status. We use sigaction rather than plain signal() on those OS where
1642 SA_NOCLDWAIT exists, because we want to be sure it is turned off. (There was a
1643 problem on AIX with this.) */
1647 struct sigaction act;
1648 act.sa_handler = SIG_DFL;
1649 sigemptyset(&(act.sa_mask));
1651 sigaction(SIGCHLD, &act, NULL);
1654 signal(SIGCHLD, SIG_DFL);
1657 /* Save the arguments for use if we re-exec exim as a daemon after receiving
1662 /* Set up the version number. Set up the leading 'E' for the external form of
1663 message ids, set the pointer to the internal form, and initialize it to
1664 indicate no message being processed. */
1667 message_id_option[0] = '-';
1668 message_id_external = message_id_option + 1;
1669 message_id_external[0] = 'E';
1670 message_id = message_id_external + 1;
1673 /* Set the umask to zero so that any files Exim creates using open() are
1674 created with the modes that it specifies. NOTE: Files created with fopen() have
1675 a problem, which was not recognized till rather late (February 2006). With this
1676 umask, such files will be world writeable. (They are all content scanning files
1677 in the spool directory, which isn't world-accessible, so this is not a
1678 disaster, but it's untidy.) I don't want to change this overall setting,
1679 however, because it will interact badly with the open() calls. Instead, there's
1680 now a function called modefopen() that fiddles with the umask while calling
1685 /* Precompile the regular expression for matching a message id. Keep this in
1686 step with the code that generates ids in the accept.c module. We need to do
1687 this here, because the -M options check their arguments for syntactic validity
1688 using mac_ismsgid, which uses this. */
1691 regex_must_compile(US"^(?:[^\\W_]{6}-){2}[^\\W_]{2}$", FALSE, TRUE);
1693 /* Precompile the regular expression that is used for matching an SMTP error
1694 code, possibly extended, at the start of an error message. Note that the
1695 terminating whitespace character is included. */
1698 regex_must_compile(US"^\\d\\d\\d\\s(?:\\d\\.\\d\\d?\\d?\\.\\d\\d?\\d?\\s)?",
1701 #ifdef WHITELIST_D_MACROS
1702 /* Precompile the regular expression used to filter the content of macros
1703 given to -D for permissibility. */
1705 regex_whitelisted_macro =
1706 regex_must_compile(US"^[A-Za-z0-9_/.-]*$", FALSE, TRUE);
1710 /* If the program is called as "mailq" treat it as equivalent to "exim -bp";
1711 this seems to be a generally accepted convention, since one finds symbolic
1712 links called "mailq" in standard OS configurations. */
1714 if ((namelen == 5 && Ustrcmp(argv[0], "mailq") == 0) ||
1715 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/mailq", 6) == 0))
1718 receiving_message = FALSE;
1719 called_as = US"-mailq";
1722 /* If the program is called as "rmail" treat it as equivalent to
1723 "exim -i -oee", thus allowing UUCP messages to be input using non-SMTP mode,
1724 i.e. preventing a single dot on a line from terminating the message, and
1725 returning with zero return code, even in cases of error (provided an error
1726 message has been sent). */
1728 if ((namelen == 5 && Ustrcmp(argv[0], "rmail") == 0) ||
1729 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/rmail", 6) == 0))
1732 called_as = US"-rmail";
1733 errors_sender_rc = EXIT_SUCCESS;
1736 /* If the program is called as "rsmtp" treat it as equivalent to "exim -bS";
1737 this is a smail convention. */
1739 if ((namelen == 5 && Ustrcmp(argv[0], "rsmtp") == 0) ||
1740 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/rsmtp", 6) == 0))
1742 smtp_input = smtp_batched_input = TRUE;
1743 called_as = US"-rsmtp";
1746 /* If the program is called as "runq" treat it as equivalent to "exim -q";
1747 this is a smail convention. */
1749 if ((namelen == 4 && Ustrcmp(argv[0], "runq") == 0) ||
1750 (namelen > 4 && Ustrncmp(argv[0] + namelen - 5, "/runq", 5) == 0))
1753 receiving_message = FALSE;
1754 called_as = US"-runq";
1757 /* If the program is called as "newaliases" treat it as equivalent to
1758 "exim -bi"; this is a sendmail convention. */
1760 if ((namelen == 10 && Ustrcmp(argv[0], "newaliases") == 0) ||
1761 (namelen > 10 && Ustrncmp(argv[0] + namelen - 11, "/newaliases", 11) == 0))
1764 receiving_message = FALSE;
1765 called_as = US"-newaliases";
1768 /* Save the original effective uid for a couple of uses later. It should
1769 normally be root, but in some esoteric environments it may not be. */
1771 original_euid = geteuid();
1773 /* Get the real uid and gid. If the caller is root, force the effective uid/gid
1774 to be the same as the real ones. This makes a difference only if Exim is setuid
1775 (or setgid) to something other than root, which could be the case in some
1776 special configurations. */
1778 real_uid = getuid();
1779 real_gid = getgid();
1781 if (real_uid == root_uid)
1783 rv = setgid(real_gid);
1786 fprintf(stderr, "exim: setgid(%ld) failed: %s\n",
1787 (long int)real_gid, strerror(errno));
1790 rv = setuid(real_uid);
1793 fprintf(stderr, "exim: setuid(%ld) failed: %s\n",
1794 (long int)real_uid, strerror(errno));
1799 /* If neither the original real uid nor the original euid was root, Exim is
1800 running in an unprivileged state. */
1802 unprivileged = (real_uid != root_uid && original_euid != root_uid);
1804 /* Scan the program's arguments. Some can be dealt with right away; others are
1805 simply recorded for checking and handling afterwards. Do a high-level switch
1806 on the second character (the one after '-'), to save some effort. */
1808 for (i = 1; i < argc; i++)
1810 BOOL badarg = FALSE;
1811 uschar *arg = argv[i];
1815 /* An argument not starting with '-' is the start of a recipients list;
1816 break out of the options-scanning loop. */
1824 /* An option consistion of -- terminates the options */
1826 if (Ustrcmp(arg, "--") == 0)
1828 recipients_arg = i + 1;
1832 /* Handle flagged options */
1834 switchchar = arg[1];
1837 /* Make all -ex options synonymous with -oex arguments, since that
1838 is assumed by various callers. Also make -qR options synonymous with -R
1839 options, as that seems to be required as well. Allow for -qqR too, and
1840 the same for -S options. */
1842 if (Ustrncmp(arg+1, "oe", 2) == 0 ||
1843 Ustrncmp(arg+1, "qR", 2) == 0 ||
1844 Ustrncmp(arg+1, "qS", 2) == 0)
1846 switchchar = arg[2];
1849 else if (Ustrncmp(arg+1, "qqR", 3) == 0 || Ustrncmp(arg+1, "qqS", 3) == 0)
1851 switchchar = arg[3];
1853 queue_2stage = TRUE;
1856 /* Make -r synonymous with -f, since it is a documented alias */
1858 else if (arg[1] == 'r') switchchar = 'f';
1860 /* Make -ov synonymous with -v */
1862 else if (Ustrcmp(arg, "-ov") == 0)
1868 /* deal with --option_aliases */
1869 else if (switchchar == '-')
1871 if (Ustrcmp(argrest, "help") == 0)
1873 usage_wanted = TRUE;
1876 else if (Ustrcmp(argrest, "version") == 0)
1883 /* High-level switch on active initial letter */
1888 /* sendmail uses -Ac and -Am to control which .cf file is used;
1891 if (*argrest == '\0') { badarg = TRUE; break; }
1894 BOOL ignore = FALSE;
1899 if (*(argrest + 1) == '\0')
1903 if (!ignore) { badarg = TRUE; break; }
1907 /* -Btype is a sendmail option for 7bit/8bit setting. Exim is 8-bit clean
1908 so has no need of it. */
1911 if (*argrest == 0) i++; /* Skip over the type */
1916 receiving_message = FALSE; /* Reset TRUE for -bm, -bS, -bs below */
1918 /* -bd: Run in daemon mode, awaiting SMTP connections.
1919 -bdf: Ditto, but in the foreground.
1922 if (*argrest == 'd')
1924 daemon_listen = TRUE;
1925 if (*(++argrest) == 'f') background_daemon = FALSE;
1926 else if (*argrest != 0) { badarg = TRUE; break; }
1929 /* -be: Run in expansion test mode
1930 -bem: Ditto, but read a message from a file first
1933 else if (*argrest == 'e')
1935 expansion_test = checking = TRUE;
1936 if (argrest[1] == 'm')
1938 if (++i >= argc) { badarg = TRUE; break; }
1939 expansion_test_message = argv[i];
1942 if (argrest[1] != 0) { badarg = TRUE; break; }
1945 /* -bF: Run system filter test */
1947 else if (*argrest == 'F')
1949 filter_test |= FTEST_SYSTEM;
1950 if (*(++argrest) != 0) { badarg = TRUE; break; }
1951 if (++i < argc) filter_test_sfile = argv[i]; else
1953 fprintf(stderr, "exim: file name expected after %s\n", argv[i-1]);
1958 /* -bf: Run user filter test
1959 -bfd: Set domain for filter testing
1960 -bfl: Set local part for filter testing
1961 -bfp: Set prefix for filter testing
1962 -bfs: Set suffix for filter testing
1965 else if (*argrest == 'f')
1967 if (*(++argrest) == 0)
1969 filter_test |= FTEST_USER;
1970 if (++i < argc) filter_test_ufile = argv[i]; else
1972 fprintf(stderr, "exim: file name expected after %s\n", argv[i-1]);
1980 fprintf(stderr, "exim: string expected after %s\n", arg);
1983 if (Ustrcmp(argrest, "d") == 0) ftest_domain = argv[i];
1984 else if (Ustrcmp(argrest, "l") == 0) ftest_localpart = argv[i];
1985 else if (Ustrcmp(argrest, "p") == 0) ftest_prefix = argv[i];
1986 else if (Ustrcmp(argrest, "s") == 0) ftest_suffix = argv[i];
1987 else { badarg = TRUE; break; }
1991 /* -bh: Host checking - an IP address must follow. */
1993 else if (Ustrcmp(argrest, "h") == 0 || Ustrcmp(argrest, "hc") == 0)
1995 if (++i >= argc) { badarg = TRUE; break; }
1996 sender_host_address = argv[i];
1997 host_checking = checking = log_testing_mode = TRUE;
1998 host_checking_callout = argrest[1] == 'c';
2001 /* -bi: This option is used by sendmail to initialize *the* alias file,
2002 though it has the -oA option to specify a different file. Exim has no
2003 concept of *the* alias file, but since Sun's YP make script calls
2004 sendmail this way, some support must be provided. */
2006 else if (Ustrcmp(argrest, "i") == 0) bi_option = TRUE;
2008 /* -bI: provide information, of the type to follow after a colon.
2009 This is an Exim flag. */
2011 else if (argrest[0] == 'I' && Ustrlen(argrest) >= 2 && argrest[1] == ':')
2013 uschar *p = &argrest[2];
2014 info_flag = CMDINFO_HELP;
2017 if (strcmpic(p, CUS"sieve") == 0)
2019 info_flag = CMDINFO_SIEVE;
2022 else if (strcmpic(p, CUS"dscp") == 0)
2024 info_flag = CMDINFO_DSCP;
2027 else if (strcmpic(p, CUS"help") == 0)
2034 /* -bm: Accept and deliver message - the default option. Reinstate
2035 receiving_message, which got turned off for all -b options. */
2037 else if (Ustrcmp(argrest, "m") == 0) receiving_message = TRUE;
2039 /* -bmalware: test the filename given for malware */
2041 else if (Ustrcmp(argrest, "malware") == 0)
2043 if (++i >= argc) { badarg = TRUE; break; }
2044 malware_test_file = argv[i];
2047 /* -bnq: For locally originating messages, do not qualify unqualified
2048 addresses. In the envelope, this causes errors; in header lines they
2051 else if (Ustrcmp(argrest, "nq") == 0)
2053 allow_unqualified_sender = FALSE;
2054 allow_unqualified_recipient = FALSE;
2057 /* -bpxx: List the contents of the mail queue, in various forms. If
2058 the option is -bpc, just a queue count is needed. Otherwise, if the
2059 first letter after p is r, then order is random. */
2061 else if (*argrest == 'p')
2063 if (*(++argrest) == 'c')
2066 if (*(++argrest) != 0) badarg = TRUE;
2070 if (*argrest == 'r')
2072 list_queue_option = 8;
2075 else list_queue_option = 0;
2079 /* -bp: List the contents of the mail queue, top-level only */
2081 if (*argrest == 0) {}
2083 /* -bpu: List the contents of the mail queue, top-level undelivered */
2085 else if (Ustrcmp(argrest, "u") == 0) list_queue_option += 1;
2087 /* -bpa: List the contents of the mail queue, including all delivered */
2089 else if (Ustrcmp(argrest, "a") == 0) list_queue_option += 2;
2091 /* Unknown after -bp[r] */
2101 /* -bP: List the configuration variables given as the address list.
2102 Force -v, so configuration errors get displayed. */
2104 else if (Ustrcmp(argrest, "P") == 0)
2106 list_options = TRUE;
2107 debug_selector |= D_v;
2108 debug_file = stderr;
2111 /* -brt: Test retry configuration lookup */
2113 else if (Ustrcmp(argrest, "rt") == 0)
2115 test_retry_arg = i + 1;
2119 /* -brw: Test rewrite configuration */
2121 else if (Ustrcmp(argrest, "rw") == 0)
2123 test_rewrite_arg = i + 1;
2127 /* -bS: Read SMTP commands on standard input, but produce no replies -
2128 all errors are reported by sending messages. */
2130 else if (Ustrcmp(argrest, "S") == 0)
2131 smtp_input = smtp_batched_input = receiving_message = TRUE;
2133 /* -bs: Read SMTP commands on standard input and produce SMTP replies
2134 on standard output. */
2136 else if (Ustrcmp(argrest, "s") == 0) smtp_input = receiving_message = TRUE;
2138 /* -bt: address testing mode */
2140 else if (Ustrcmp(argrest, "t") == 0)
2141 address_test_mode = checking = log_testing_mode = TRUE;
2143 /* -bv: verify addresses */
2145 else if (Ustrcmp(argrest, "v") == 0)
2146 verify_address_mode = checking = log_testing_mode = TRUE;
2148 /* -bvs: verify sender addresses */
2150 else if (Ustrcmp(argrest, "vs") == 0)
2152 verify_address_mode = checking = log_testing_mode = TRUE;
2153 verify_as_sender = TRUE;
2156 /* -bV: Print version string and support details */
2158 else if (Ustrcmp(argrest, "V") == 0)
2160 printf("Exim version %s #%s built %s\n", version_string,
2161 version_cnumber, version_date);
2162 printf("%s\n", CS version_copyright);
2163 version_printed = TRUE;
2164 show_whats_supported(stdout);
2167 /* -bw: inetd wait mode, accept a listening socket as stdin */
2169 else if (*argrest == 'w')
2171 inetd_wait_mode = TRUE;
2172 background_daemon = FALSE;
2173 daemon_listen = TRUE;
2174 if (*(++argrest) != '\0')
2176 inetd_wait_timeout = readconf_readtime(argrest, 0, FALSE);
2177 if (inetd_wait_timeout <= 0)
2179 fprintf(stderr, "exim: bad time value %s: abandoned\n", argv[i]);
2189 /* -C: change configuration file list; ignore if it isn't really
2190 a change! Enforce a prefix check if required. */
2195 if(++i < argc) argrest = argv[i]; else
2196 { badarg = TRUE; break; }
2198 if (Ustrcmp(config_main_filelist, argrest) != 0)
2200 #ifdef ALT_CONFIG_PREFIX
2202 int len = Ustrlen(ALT_CONFIG_PREFIX);
2203 uschar *list = argrest;
2205 while((filename = string_nextinlist(&list, &sep, big_buffer,
2206 big_buffer_size)) != NULL)
2208 if ((Ustrlen(filename) < len ||
2209 Ustrncmp(filename, ALT_CONFIG_PREFIX, len) != 0 ||
2210 Ustrstr(filename, "/../") != NULL) &&
2211 (Ustrcmp(filename, "/dev/null") != 0 || real_uid != root_uid))
2213 fprintf(stderr, "-C Permission denied\n");
2218 if (real_uid != root_uid)
2220 #ifdef TRUSTED_CONFIG_LIST
2222 if (real_uid != exim_uid
2223 #ifdef CONFIGURE_OWNER
2224 && real_uid != config_uid
2227 trusted_config = FALSE;
2230 FILE *trust_list = Ufopen(TRUSTED_CONFIG_LIST, "rb");
2233 struct stat statbuf;
2235 if (fstat(fileno(trust_list), &statbuf) != 0 ||
2236 (statbuf.st_uid != root_uid /* owner not root */
2237 #ifdef CONFIGURE_OWNER
2238 && statbuf.st_uid != config_uid /* owner not the special one */
2241 (statbuf.st_gid != root_gid /* group not root */
2242 #ifdef CONFIGURE_GROUP
2243 && statbuf.st_gid != config_gid /* group not the special one */
2245 && (statbuf.st_mode & 020) != 0 /* group writeable */
2247 (statbuf.st_mode & 2) != 0) /* world writeable */
2249 trusted_config = FALSE;
2254 /* Well, the trust list at least is up to scratch... */
2255 void *reset_point = store_get(0);
2256 uschar *trusted_configs[32];
2260 while (Ufgets(big_buffer, big_buffer_size, trust_list))
2262 uschar *start = big_buffer, *nl;
2263 while (*start && isspace(*start))
2267 nl = Ustrchr(start, '\n');
2270 trusted_configs[nr_configs++] = string_copy(start);
2271 if (nr_configs == 32)
2279 uschar *list = argrest;
2281 while (trusted_config && (filename = string_nextinlist(&list,
2282 &sep, big_buffer, big_buffer_size)) != NULL)
2284 for (i=0; i < nr_configs; i++)
2286 if (Ustrcmp(filename, trusted_configs[i]) == 0)
2289 if (i == nr_configs)
2291 trusted_config = FALSE;
2295 store_reset(reset_point);
2299 /* No valid prefixes found in trust_list file. */
2300 trusted_config = FALSE;
2306 /* Could not open trust_list file. */
2307 trusted_config = FALSE;
2311 /* Not root; don't trust config */
2312 trusted_config = FALSE;
2316 config_main_filelist = argrest;
2317 config_changed = TRUE;
2322 /* -D: set up a macro definition */
2325 #ifdef DISABLE_D_OPTION
2326 fprintf(stderr, "exim: -D is not available in this Exim binary\n");
2331 macro_item *mlast = NULL;
2334 uschar *s = argrest;
2336 while (isspace(*s)) s++;
2338 if (*s < 'A' || *s > 'Z')
2340 fprintf(stderr, "exim: macro name set by -D must start with "
2341 "an upper case letter\n");
2345 while (isalnum(*s) || *s == '_')
2347 if (ptr < sizeof(name)-1) name[ptr++] = *s;
2351 if (ptr == 0) { badarg = TRUE; break; }
2352 while (isspace(*s)) s++;
2355 if (*s++ != '=') { badarg = TRUE; break; }
2356 while (isspace(*s)) s++;
2359 for (m = macros; m != NULL; m = m->next)
2361 if (Ustrcmp(m->name, name) == 0)
2363 fprintf(stderr, "exim: duplicated -D in command line\n");
2369 m = store_get(sizeof(macro_item) + Ustrlen(name));
2371 m->command_line = TRUE;
2372 if (mlast == NULL) macros = m; else mlast->next = m;
2373 Ustrcpy(m->name, name);
2374 m->replacement = string_copy(s);
2376 if (clmacro_count >= MAX_CLMACROS)
2378 fprintf(stderr, "exim: too many -D options on command line\n");
2381 clmacros[clmacro_count++] = string_sprintf("-D%s=%s", m->name,
2387 /* -d: Set debug level (see also -v below) or set the drop_cr option.
2388 The latter is now a no-op, retained for compatibility only. If -dd is used,
2389 debugging subprocesses of the daemon is disabled. */
2392 if (Ustrcmp(argrest, "ropcr") == 0)
2394 /* drop_cr = TRUE; */
2397 /* Use an intermediate variable so that we don't set debugging while
2398 decoding the debugging bits. */
2402 unsigned int selector = D_default;
2405 if (*argrest == 'd')
2407 debug_daemon = TRUE;
2411 decode_bits(&selector, NULL, D_memory, 0, argrest, debug_options,
2412 debug_options_count, US"debug", 0);
2413 debug_selector = selector;
2418 /* -E: This is a local error message. This option is not intended for
2419 external use at all, but is not restricted to trusted callers because it
2420 does no harm (just suppresses certain error messages) and if Exim is run
2421 not setuid root it won't always be trusted when it generates error
2422 messages using this option. If there is a message id following -E, point
2423 message_reference at it, for logging. */
2426 local_error_message = TRUE;
2427 if (mac_ismsgid(argrest)) message_reference = argrest;
2431 /* -ex: The vacation program calls sendmail with the undocumented "-eq"
2432 option, so it looks as if historically the -oex options are also callable
2433 without the leading -o. So we have to accept them. Before the switch,
2434 anything starting -oe has been converted to -e. Exim does not support all
2435 of the sendmail error options. */
2438 if (Ustrcmp(argrest, "e") == 0)
2440 arg_error_handling = ERRORS_SENDER;
2441 errors_sender_rc = EXIT_SUCCESS;
2443 else if (Ustrcmp(argrest, "m") == 0) arg_error_handling = ERRORS_SENDER;
2444 else if (Ustrcmp(argrest, "p") == 0) arg_error_handling = ERRORS_STDERR;
2445 else if (Ustrcmp(argrest, "q") == 0) arg_error_handling = ERRORS_STDERR;
2446 else if (Ustrcmp(argrest, "w") == 0) arg_error_handling = ERRORS_SENDER;
2451 /* -F: Set sender's full name, used instead of the gecos entry from
2452 the password file. Since users can usually alter their gecos entries,
2453 there's no security involved in using this instead. The data can follow
2454 the -F or be in the next argument. */
2459 if(++i < argc) argrest = argv[i]; else
2460 { badarg = TRUE; break; }
2462 originator_name = argrest;
2463 sender_name_forced = TRUE;
2467 /* -f: Set sender's address - this value is only actually used if Exim is
2468 run by a trusted user, or if untrusted_set_sender is set and matches the
2469 address, except that the null address can always be set by any user. The
2470 test for this happens later, when the value given here is ignored when not
2471 permitted. For an untrusted user, the actual sender is still put in Sender:
2472 if it doesn't match the From: header (unless no_local_from_check is set).
2473 The data can follow the -f or be in the next argument. The -r switch is an
2474 obsolete form of -f but since there appear to be programs out there that
2475 use anything that sendmail has ever supported, better accept it - the
2476 synonymizing is done before the switch above.
2478 At this stage, we must allow domain literal addresses, because we don't
2479 know what the setting of allow_domain_literals is yet. Ditto for trailing
2480 dots and strip_trailing_dot. */
2488 if (i+1 < argc) argrest = argv[++i]; else
2489 { badarg = TRUE; break; }
2493 sender_address = string_sprintf(""); /* Ensure writeable memory */
2497 uschar *temp = argrest + Ustrlen(argrest) - 1;
2498 while (temp >= argrest && isspace(*temp)) temp--;
2499 if (temp >= argrest && *temp == '.') f_end_dot = TRUE;
2500 allow_domain_literals = TRUE;
2501 strip_trailing_dot = TRUE;
2502 sender_address = parse_extract_address(argrest, &errmess, &start, &end,
2503 &sender_address_domain, TRUE);
2504 allow_domain_literals = FALSE;
2505 strip_trailing_dot = FALSE;
2506 if (sender_address == NULL)
2508 fprintf(stderr, "exim: bad -f address \"%s\": %s\n", argrest, errmess);
2509 return EXIT_FAILURE;
2512 sender_address_forced = TRUE;
2516 /* -G: sendmail invocation to specify that it's a gateway submission and
2517 sendmail may complain about problems instead of fixing them.
2518 We make it equivalent to an ACL "control = suppress_local_fixups" and do
2519 not at this time complain about problems. */
2525 /* -h: Set the hop count for an incoming message. Exim does not currently
2526 support this; it always computes it by counting the Received: headers.
2527 To put it in will require a change to the spool header file format. */
2532 if(++i < argc) argrest = argv[i]; else
2533 { badarg = TRUE; break; }
2535 if (!isdigit(*argrest)) badarg = TRUE;
2539 /* -i: Set flag so dot doesn't end non-SMTP input (same as -oi, seems
2540 not to be documented for sendmail but mailx (at least) uses it) */
2543 if (*argrest == 0) dot_ends = FALSE; else badarg = TRUE;
2547 /* -L: set the identifier used for syslog; equivalent to setting
2548 syslog_processname in the config file, but needs to be an admin option. */
2551 if (*argrest == '\0')
2553 if(++i < argc) argrest = argv[i]; else
2554 { badarg = TRUE; break; }
2556 sz = Ustrlen(argrest);
2559 fprintf(stderr, "exim: the -L syslog name is too long: \"%s\"\n", argrest);
2560 return EXIT_FAILURE;
2564 fprintf(stderr, "exim: the -L syslog name is too short\n");
2565 return EXIT_FAILURE;
2567 cmdline_syslog_name = argrest;
2571 receiving_message = FALSE;
2573 /* -MC: continue delivery of another message via an existing open
2574 file descriptor. This option is used for an internal call by the
2575 smtp transport when there is a pending message waiting to go to an
2576 address to which it has got a connection. Five subsequent arguments are
2577 required: transport name, host name, IP address, sequence number, and
2578 message_id. Transports may decline to create new processes if the sequence
2579 number gets too big. The channel is stdin. This (-MC) must be the last
2580 argument. There's a subsequent check that the real-uid is privileged.
2582 If we are running in the test harness. delay for a bit, to let the process
2583 that set this one up complete. This makes for repeatability of the logging,
2586 if (Ustrcmp(argrest, "C") == 0)
2588 union sockaddr_46 interface_sock;
2589 EXIM_SOCKLEN_T size = sizeof(interface_sock);
2593 fprintf(stderr, "exim: too many or too few arguments after -MC\n");
2594 return EXIT_FAILURE;
2597 if (msg_action_arg >= 0)
2599 fprintf(stderr, "exim: incompatible arguments\n");
2600 return EXIT_FAILURE;
2603 continue_transport = argv[++i];
2604 continue_hostname = argv[++i];
2605 continue_host_address = argv[++i];
2606 continue_sequence = Uatoi(argv[++i]);
2607 msg_action = MSG_DELIVER;
2608 msg_action_arg = ++i;
2609 forced_delivery = TRUE;
2610 queue_run_pid = passed_qr_pid;
2611 queue_run_pipe = passed_qr_pipe;
2613 if (!mac_ismsgid(argv[i]))
2615 fprintf(stderr, "exim: malformed message id %s after -MC option\n",
2617 return EXIT_FAILURE;
2620 /* Set up $sending_ip_address and $sending_port */
2622 if (getsockname(fileno(stdin), (struct sockaddr *)(&interface_sock),
2624 sending_ip_address = host_ntoa(-1, &interface_sock, NULL,
2628 fprintf(stderr, "exim: getsockname() failed after -MC option: %s\n",
2630 return EXIT_FAILURE;
2633 if (running_in_test_harness) millisleep(500);
2637 /* -MCA: set the smtp_authenticated flag; this is useful only when it
2638 precedes -MC (see above). The flag indicates that the host to which
2639 Exim is connected has accepted an AUTH sequence. */
2641 else if (Ustrcmp(argrest, "CA") == 0)
2643 smtp_authenticated = TRUE;
2647 /* -MCP: set the smtp_use_pipelining flag; this is useful only when
2648 it preceded -MC (see above) */
2650 else if (Ustrcmp(argrest, "CP") == 0)
2652 smtp_use_pipelining = TRUE;
2656 /* -MCQ: pass on the pid of the queue-running process that started
2657 this chain of deliveries and the fd of its synchronizing pipe; this
2658 is useful only when it precedes -MC (see above) */
2660 else if (Ustrcmp(argrest, "CQ") == 0)
2662 if(++i < argc) passed_qr_pid = (pid_t)(Uatol(argv[i]));
2664 if(++i < argc) passed_qr_pipe = (int)(Uatol(argv[i]));
2669 /* -MCS: set the smtp_use_size flag; this is useful only when it
2670 precedes -MC (see above) */
2672 else if (Ustrcmp(argrest, "CS") == 0)
2674 smtp_use_size = TRUE;
2678 /* -MCT: set the tls_offered flag; this is useful only when it
2679 precedes -MC (see above). The flag indicates that the host to which
2680 Exim is connected has offered TLS support. */
2683 else if (Ustrcmp(argrest, "CT") == 0)
2690 /* -M[x]: various operations on the following list of message ids:
2691 -M deliver the messages, ignoring next retry times and thawing
2692 -Mc deliver the messages, checking next retry times, no thawing
2693 -Mf freeze the messages
2694 -Mg give up on the messages
2695 -Mt thaw the messages
2696 -Mrm remove the messages
2697 In the above cases, this must be the last option. There are also the
2698 following options which are followed by a single message id, and which
2699 act on that message. Some of them use the "recipient" addresses as well.
2700 -Mar add recipient(s)
2701 -Mmad mark all recipients delivered
2702 -Mmd mark recipients(s) delivered
2704 -Mset load a message for use with -be
2706 -Mvc show copy (of whole message, in RFC 2822 format)
2711 else if (*argrest == 0)
2713 msg_action = MSG_DELIVER;
2714 forced_delivery = deliver_force_thaw = TRUE;
2716 else if (Ustrcmp(argrest, "ar") == 0)
2718 msg_action = MSG_ADD_RECIPIENT;
2719 one_msg_action = TRUE;
2721 else if (Ustrcmp(argrest, "c") == 0) msg_action = MSG_DELIVER;
2722 else if (Ustrcmp(argrest, "es") == 0)
2724 msg_action = MSG_EDIT_SENDER;
2725 one_msg_action = TRUE;
2727 else if (Ustrcmp(argrest, "f") == 0) msg_action = MSG_FREEZE;
2728 else if (Ustrcmp(argrest, "g") == 0)
2730 msg_action = MSG_DELIVER;
2731 deliver_give_up = TRUE;
2733 else if (Ustrcmp(argrest, "mad") == 0)
2735 msg_action = MSG_MARK_ALL_DELIVERED;
2737 else if (Ustrcmp(argrest, "md") == 0)
2739 msg_action = MSG_MARK_DELIVERED;
2740 one_msg_action = TRUE;
2742 else if (Ustrcmp(argrest, "rm") == 0) msg_action = MSG_REMOVE;
2743 else if (Ustrcmp(argrest, "set") == 0)
2745 msg_action = MSG_LOAD;
2746 one_msg_action = TRUE;
2748 else if (Ustrcmp(argrest, "t") == 0) msg_action = MSG_THAW;
2749 else if (Ustrcmp(argrest, "vb") == 0)
2751 msg_action = MSG_SHOW_BODY;
2752 one_msg_action = TRUE;
2754 else if (Ustrcmp(argrest, "vc") == 0)
2756 msg_action = MSG_SHOW_COPY;
2757 one_msg_action = TRUE;
2759 else if (Ustrcmp(argrest, "vh") == 0)
2761 msg_action = MSG_SHOW_HEADER;
2762 one_msg_action = TRUE;
2764 else if (Ustrcmp(argrest, "vl") == 0)
2766 msg_action = MSG_SHOW_LOG;
2767 one_msg_action = TRUE;
2769 else { badarg = TRUE; break; }
2771 /* All the -Mxx options require at least one message id. */
2773 msg_action_arg = i + 1;
2774 if (msg_action_arg >= argc)
2776 fprintf(stderr, "exim: no message ids given after %s option\n", arg);
2777 return EXIT_FAILURE;
2780 /* Some require only message ids to follow */
2782 if (!one_msg_action)
2785 for (j = msg_action_arg; j < argc; j++) if (!mac_ismsgid(argv[j]))
2787 fprintf(stderr, "exim: malformed message id %s after %s option\n",
2789 return EXIT_FAILURE;
2791 goto END_ARG; /* Remaining args are ids */
2794 /* Others require only one message id, possibly followed by addresses,
2795 which will be handled as normal arguments. */
2799 if (!mac_ismsgid(argv[msg_action_arg]))
2801 fprintf(stderr, "exim: malformed message id %s after %s option\n",
2802 argv[msg_action_arg], arg);
2803 return EXIT_FAILURE;
2810 /* Some programs seem to call the -om option without the leading o;
2811 for sendmail it askes for "me too". Exim always does this. */
2814 if (*argrest != 0) badarg = TRUE;
2818 /* -N: don't do delivery - a debugging option that stops transports doing
2819 their thing. It implies debugging at the D_v level. */
2824 dont_deliver = TRUE;
2825 debug_selector |= D_v;
2826 debug_file = stderr;
2832 /* -n: This means "don't alias" in sendmail, apparently.
2833 For normal invocations, it has no effect.
2834 It may affect some other options. */
2840 /* -O: Just ignore it. In sendmail, apparently -O option=value means set
2841 option to the specified value. This form uses long names. We need to handle
2842 -O option=value and -Ooption=value. */
2849 fprintf(stderr, "exim: string expected after -O\n");
2857 /* -oA: Set an argument for the bi command (sendmail's "alternate alias
2860 if (*argrest == 'A')
2862 alias_arg = argrest + 1;
2863 if (alias_arg[0] == 0)
2865 if (i+1 < argc) alias_arg = argv[++i]; else
2867 fprintf(stderr, "exim: string expected after -oA\n");
2873 /* -oB: Set a connection message max value for remote deliveries */
2875 else if (*argrest == 'B')
2877 uschar *p = argrest + 1;
2880 if (i+1 < argc && isdigit((argv[i+1][0]))) p = argv[++i]; else
2882 connection_max_messages = 1;
2891 fprintf(stderr, "exim: number expected after -oB\n");
2894 connection_max_messages = Uatoi(p);
2898 /* -odb: background delivery */
2900 else if (Ustrcmp(argrest, "db") == 0)
2902 synchronous_delivery = FALSE;
2903 arg_queue_only = FALSE;
2904 queue_only_set = TRUE;
2907 /* -odf: foreground delivery (smail-compatible option); same effect as
2908 -odi: interactive (synchronous) delivery (sendmail-compatible option)
2911 else if (Ustrcmp(argrest, "df") == 0 || Ustrcmp(argrest, "di") == 0)
2913 synchronous_delivery = TRUE;
2914 arg_queue_only = FALSE;
2915 queue_only_set = TRUE;
2918 /* -odq: queue only */
2920 else if (Ustrcmp(argrest, "dq") == 0)
2922 synchronous_delivery = FALSE;
2923 arg_queue_only = TRUE;
2924 queue_only_set = TRUE;
2927 /* -odqs: queue SMTP only - do local deliveries and remote routing,
2928 but no remote delivery */
2930 else if (Ustrcmp(argrest, "dqs") == 0)
2933 arg_queue_only = FALSE;
2934 queue_only_set = TRUE;
2937 /* -oex: Sendmail error flags. As these are also accepted without the
2938 leading -o prefix, for compatibility with vacation and other callers,
2939 they are handled with -e above. */
2941 /* -oi: Set flag so dot doesn't end non-SMTP input (same as -i)
2942 -oitrue: Another sendmail syntax for the same */
2944 else if (Ustrcmp(argrest, "i") == 0 ||
2945 Ustrcmp(argrest, "itrue") == 0)
2948 /* -oM*: Set various characteristics for an incoming message; actually
2949 acted on for trusted callers only. */
2951 else if (*argrest == 'M')
2955 fprintf(stderr, "exim: data expected after -o%s\n", argrest);
2959 /* -oMa: Set sender host address */
2961 if (Ustrcmp(argrest, "Ma") == 0) sender_host_address = argv[++i];
2963 /* -oMaa: Set authenticator name */
2965 else if (Ustrcmp(argrest, "Maa") == 0)
2966 sender_host_authenticated = argv[++i];
2968 /* -oMas: setting authenticated sender */
2970 else if (Ustrcmp(argrest, "Mas") == 0) authenticated_sender = argv[++i];
2972 /* -oMai: setting authenticated id */
2974 else if (Ustrcmp(argrest, "Mai") == 0) authenticated_id = argv[++i];
2976 /* -oMi: Set incoming interface address */
2978 else if (Ustrcmp(argrest, "Mi") == 0) interface_address = argv[++i];
2980 /* -oMr: Received protocol */
2982 else if (Ustrcmp(argrest, "Mr") == 0) received_protocol = argv[++i];
2984 /* -oMs: Set sender host name */
2986 else if (Ustrcmp(argrest, "Ms") == 0) sender_host_name = argv[++i];
2988 /* -oMt: Set sender ident */
2990 else if (Ustrcmp(argrest, "Mt") == 0)
2992 sender_ident_set = TRUE;
2993 sender_ident = argv[++i];
2996 /* Else a bad argument */
3005 /* -om: Me-too flag for aliases. Exim always does this. Some programs
3006 seem to call this as -m (undocumented), so that is also accepted (see
3009 else if (Ustrcmp(argrest, "m") == 0) {}
3011 /* -oo: An ancient flag for old-style addresses which still seems to
3012 crop up in some calls (see in SCO). */
3014 else if (Ustrcmp(argrest, "o") == 0) {}
3016 /* -oP <name>: set pid file path for daemon */
3018 else if (Ustrcmp(argrest, "P") == 0)
3019 override_pid_file_path = argv[++i];
3021 /* -or <n>: set timeout for non-SMTP acceptance
3022 -os <n>: set timeout for SMTP acceptance */
3024 else if (*argrest == 'r' || *argrest == 's')
3026 int *tp = (*argrest == 'r')?
3027 &arg_receive_timeout : &arg_smtp_receive_timeout;
3028 if (argrest[1] == 0)
3030 if (i+1 < argc) *tp= readconf_readtime(argv[++i], 0, FALSE);
3032 else *tp = readconf_readtime(argrest + 1, 0, FALSE);
3035 fprintf(stderr, "exim: bad time value %s: abandoned\n", argv[i]);
3040 /* -oX <list>: Override local_interfaces and/or default daemon ports */
3042 else if (Ustrcmp(argrest, "X") == 0)
3043 override_local_interfaces = argv[++i];
3045 /* Unknown -o argument */
3051 /* -ps: force Perl startup; -pd force delayed Perl startup */
3055 if (*argrest == 's' && argrest[1] == 0)
3057 perl_start_option = 1;
3060 if (*argrest == 'd' && argrest[1] == 0)
3062 perl_start_option = -1;
3067 /* -panythingelse is taken as the Sendmail-compatible argument -prval:sval,
3068 which sets the host protocol and host name */
3072 if (i+1 < argc) argrest = argv[++i]; else
3073 { badarg = TRUE; break; }
3078 uschar *hn = Ustrchr(argrest, ':');
3081 received_protocol = argrest;
3085 received_protocol = string_copyn(argrest, hn - argrest);
3086 sender_host_name = hn + 1;
3093 receiving_message = FALSE;
3094 if (queue_interval >= 0)
3096 fprintf(stderr, "exim: -q specified more than once\n");
3100 /* -qq...: Do queue runs in a 2-stage manner */
3102 if (*argrest == 'q')
3104 queue_2stage = TRUE;
3108 /* -qi...: Do only first (initial) deliveries */
3110 if (*argrest == 'i')
3112 queue_run_first_delivery = TRUE;
3116 /* -qf...: Run the queue, forcing deliveries
3117 -qff..: Ditto, forcing thawing as well */
3119 if (*argrest == 'f')
3121 queue_run_force = TRUE;
3122 if (*(++argrest) == 'f')
3124 deliver_force_thaw = TRUE;
3129 /* -q[f][f]l...: Run the queue only on local deliveries */
3131 if (*argrest == 'l')
3133 queue_run_local = TRUE;
3137 /* -q[f][f][l]: Run the queue, optionally forced, optionally local only,
3138 optionally starting from a given message id. */
3140 if (*argrest == 0 &&
3141 (i + 1 >= argc || argv[i+1][0] == '-' || mac_ismsgid(argv[i+1])))
3144 if (i+1 < argc && mac_ismsgid(argv[i+1]))
3145 start_queue_run_id = argv[++i];
3146 if (i+1 < argc && mac_ismsgid(argv[i+1]))
3147 stop_queue_run_id = argv[++i];
3150 /* -q[f][f][l]<n>: Run the queue at regular intervals, optionally forced,
3151 optionally local only. */
3156 queue_interval = readconf_readtime(argrest, 0, FALSE);
3158 queue_interval = readconf_readtime(argv[++i], 0, FALSE);
3159 if (queue_interval <= 0)
3161 fprintf(stderr, "exim: bad time value %s: abandoned\n", argv[i]);
3168 case 'R': /* Synonymous with -qR... */
3169 receiving_message = FALSE;
3171 /* -Rf: As -R (below) but force all deliveries,
3172 -Rff: Ditto, but also thaw all frozen messages,
3173 -Rr: String is regex
3174 -Rrf: Regex and force
3175 -Rrff: Regex and force and thaw
3177 in all cases provided there are no further characters in this
3183 for (i = 0; i < sizeof(rsopts)/sizeof(uschar *); i++)
3185 if (Ustrcmp(argrest, rsopts[i]) == 0)
3187 if (i != 2) queue_run_force = TRUE;
3188 if (i >= 2) deliver_selectstring_regex = TRUE;
3189 if (i == 1 || i == 4) deliver_force_thaw = TRUE;
3190 argrest += Ustrlen(rsopts[i]);
3195 /* -R: Set string to match in addresses for forced queue run to
3196 pick out particular messages. */
3200 if (i+1 < argc) deliver_selectstring = argv[++i]; else
3202 fprintf(stderr, "exim: string expected after -R\n");
3206 else deliver_selectstring = argrest;
3210 /* -r: an obsolete synonym for -f (see above) */
3213 /* -S: Like -R but works on sender. */
3215 case 'S': /* Synonymous with -qS... */
3216 receiving_message = FALSE;
3218 /* -Sf: As -S (below) but force all deliveries,
3219 -Sff: Ditto, but also thaw all frozen messages,
3220 -Sr: String is regex
3221 -Srf: Regex and force
3222 -Srff: Regex and force and thaw
3224 in all cases provided there are no further characters in this
3230 for (i = 0; i < sizeof(rsopts)/sizeof(uschar *); i++)
3232 if (Ustrcmp(argrest, rsopts[i]) == 0)
3234 if (i != 2) queue_run_force = TRUE;
3235 if (i >= 2) deliver_selectstring_sender_regex = TRUE;
3236 if (i == 1 || i == 4) deliver_force_thaw = TRUE;
3237 argrest += Ustrlen(rsopts[i]);
3242 /* -S: Set string to match in addresses for forced queue run to
3243 pick out particular messages. */
3247 if (i+1 < argc) deliver_selectstring_sender = argv[++i]; else
3249 fprintf(stderr, "exim: string expected after -S\n");
3253 else deliver_selectstring_sender = argrest;
3256 /* -Tqt is an option that is exclusively for use by the testing suite.
3257 It is not recognized in other circumstances. It allows for the setting up
3258 of explicit "queue times" so that various warning/retry things can be
3259 tested. Otherwise variability of clock ticks etc. cause problems. */
3262 if (running_in_test_harness && Ustrcmp(argrest, "qt") == 0)
3263 fudged_queue_times = argv[++i];
3268 /* -t: Set flag to extract recipients from body of message. */
3271 if (*argrest == 0) extract_recipients = TRUE;
3273 /* -ti: Set flag to extract recipients from body of message, and also
3274 specify that dot does not end the message. */
3276 else if (Ustrcmp(argrest, "i") == 0)
3278 extract_recipients = TRUE;
3282 /* -tls-on-connect: don't wait for STARTTLS (for old clients) */
3285 else if (Ustrcmp(argrest, "ls-on-connect") == 0) tls_in.on_connect = TRUE;
3292 /* -U: This means "initial user submission" in sendmail, apparently. The
3293 doc claims that in future sendmail may refuse syntactically invalid
3294 messages instead of fixing them. For the moment, we just ignore it. */
3300 /* -v: verify things - this is a very low-level debugging */
3305 debug_selector |= D_v;
3306 debug_file = stderr;
3312 /* -x: AIX uses this to indicate some fancy 8-bit character stuff:
3314 The -x flag tells the sendmail command that mail from a local
3315 mail program has National Language Support (NLS) extended characters
3316 in the body of the mail item. The sendmail command can send mail with
3317 extended NLS characters across networks that normally corrupts these
3320 As Exim is 8-bit clean, it just ignores this flag. */
3323 if (*argrest != 0) badarg = TRUE;
3326 /* -X: in sendmail: takes one parameter, logfile, and sends debugging
3327 logs to that file. We swallow the parameter and otherwise ignore it. */
3330 if (*argrest == '\0')
3334 fprintf(stderr, "exim: string expected after -X\n");
3340 /* All other initial characters are errors */
3345 } /* End of high-level switch statement */
3347 /* Failed to recognize the option, or syntax error */
3351 fprintf(stderr, "exim abandoned: unknown, malformed, or incomplete "
3352 "option %s\n", arg);
3358 /* If -R or -S have been specified without -q, assume a single queue run. */
3360 if ((deliver_selectstring != NULL || deliver_selectstring_sender != NULL) &&
3361 queue_interval < 0) queue_interval = 0;
3365 /* If usage_wanted is set we call the usage function - which never returns */
3366 if (usage_wanted) exim_usage(called_as);
3368 /* Arguments have been processed. Check for incompatibilities. */
3370 (smtp_input || extract_recipients || recipients_arg < argc) &&
3371 (daemon_listen || queue_interval >= 0 || bi_option ||
3372 test_retry_arg >= 0 || test_rewrite_arg >= 0 ||
3373 filter_test != FTEST_NONE || (msg_action_arg > 0 && !one_msg_action))
3376 msg_action_arg > 0 &&
3377 (daemon_listen || queue_interval >= 0 || list_options ||
3378 (checking && msg_action != MSG_LOAD) ||
3379 bi_option || test_retry_arg >= 0 || test_rewrite_arg >= 0)
3382 (daemon_listen || queue_interval >= 0) &&
3383 (sender_address != NULL || list_options || list_queue || checking ||
3387 daemon_listen && queue_interval == 0
3390 inetd_wait_mode && queue_interval >= 0
3394 (checking || smtp_input || extract_recipients ||
3395 filter_test != FTEST_NONE || bi_option)
3398 verify_address_mode &&
3399 (address_test_mode || smtp_input || extract_recipients ||
3400 filter_test != FTEST_NONE || bi_option)
3403 address_test_mode && (smtp_input || extract_recipients ||
3404 filter_test != FTEST_NONE || bi_option)
3407 smtp_input && (sender_address != NULL || filter_test != FTEST_NONE ||
3411 deliver_selectstring != NULL && queue_interval < 0
3414 msg_action == MSG_LOAD &&
3415 (!expansion_test || expansion_test_message != NULL)
3419 fprintf(stderr, "exim: incompatible command-line options or arguments\n");
3423 /* If debugging is set up, set the file and the file descriptor to pass on to
3424 child processes. It should, of course, be 2 for stderr. Also, force the daemon
3425 to run in the foreground. */
3427 if (debug_selector != 0)
3429 debug_file = stderr;
3430 debug_fd = fileno(debug_file);
3431 background_daemon = FALSE;
3432 if (running_in_test_harness) millisleep(100); /* lets caller finish */
3433 if (debug_selector != D_v) /* -v only doesn't show this */
3435 debug_printf("Exim version %s uid=%ld gid=%ld pid=%d D=%x\n",
3436 version_string, (long int)real_uid, (long int)real_gid, (int)getpid(),
3438 if (!version_printed)
3439 show_whats_supported(stderr);
3443 /* When started with root privilege, ensure that the limits on the number of
3444 open files and the number of processes (where that is accessible) are
3445 sufficiently large, or are unset, in case Exim has been called from an
3446 environment where the limits are screwed down. Not all OS have the ability to
3447 change some of these limits. */
3451 DEBUG(D_any) debug_print_ids(US"Exim has no root privilege:");
3457 #ifdef RLIMIT_NOFILE
3458 if (getrlimit(RLIMIT_NOFILE, &rlp) < 0)
3460 log_write(0, LOG_MAIN|LOG_PANIC, "getrlimit(RLIMIT_NOFILE) failed: %s",
3462 rlp.rlim_cur = rlp.rlim_max = 0;
3465 /* I originally chose 1000 as a nice big number that was unlikely to
3466 be exceeded. It turns out that some older OS have a fixed upper limit of
3469 if (rlp.rlim_cur < 1000)
3471 rlp.rlim_cur = rlp.rlim_max = 1000;
3472 if (setrlimit(RLIMIT_NOFILE, &rlp) < 0)
3474 rlp.rlim_cur = rlp.rlim_max = 256;
3475 if (setrlimit(RLIMIT_NOFILE, &rlp) < 0)
3476 log_write(0, LOG_MAIN|LOG_PANIC, "setrlimit(RLIMIT_NOFILE) failed: %s",
3483 if (getrlimit(RLIMIT_NPROC, &rlp) < 0)
3485 log_write(0, LOG_MAIN|LOG_PANIC, "getrlimit(RLIMIT_NPROC) failed: %s",
3487 rlp.rlim_cur = rlp.rlim_max = 0;
3490 #ifdef RLIM_INFINITY
3491 if (rlp.rlim_cur != RLIM_INFINITY && rlp.rlim_cur < 1000)
3493 rlp.rlim_cur = rlp.rlim_max = RLIM_INFINITY;
3495 if (rlp.rlim_cur < 1000)
3497 rlp.rlim_cur = rlp.rlim_max = 1000;
3499 if (setrlimit(RLIMIT_NPROC, &rlp) < 0)
3500 log_write(0, LOG_MAIN|LOG_PANIC, "setrlimit(RLIMIT_NPROC) failed: %s",
3506 /* Exim is normally entered as root (but some special configurations are
3507 possible that don't do this). However, it always spins off sub-processes that
3508 set their uid and gid as required for local delivery. We don't want to pass on
3509 any extra groups that root may belong to, so we want to get rid of them all at
3512 We need to obey setgroups() at this stage, before possibly giving up root
3513 privilege for a changed configuration file, but later on we might need to
3514 check on the additional groups for the admin user privilege - can't do that
3515 till after reading the config, which might specify the exim gid. Therefore,
3516 save the group list here first. */
3518 group_count = getgroups(NGROUPS_MAX, group_list);
3519 if (group_count < 0)
3521 fprintf(stderr, "exim: getgroups() failed: %s\n", strerror(errno));
3525 /* There is a fundamental difference in some BSD systems in the matter of
3526 groups. FreeBSD and BSDI are known to be different; NetBSD and OpenBSD are
3527 known not to be different. On the "different" systems there is a single group
3528 list, and the first entry in it is the current group. On all other versions of
3529 Unix there is a supplementary group list, which is in *addition* to the current
3530 group. Consequently, to get rid of all extraneous groups on a "standard" system
3531 you pass over 0 groups to setgroups(), while on a "different" system you pass
3532 over a single group - the current group, which is always the first group in the
3533 list. Calling setgroups() with zero groups on a "different" system results in
3534 an error return. The following code should cope with both types of system.
3536 However, if this process isn't running as root, setgroups() can't be used
3537 since you have to be root to run it, even if throwing away groups. Not being
3538 root here happens only in some unusual configurations. We just ignore the
3541 if (setgroups(0, NULL) != 0)
3543 if (setgroups(1, group_list) != 0 && !unprivileged)
3545 fprintf(stderr, "exim: setgroups() failed: %s\n", strerror(errno));
3550 /* If the configuration file name has been altered by an argument on the
3551 command line (either a new file name or a macro definition) and the caller is
3552 not root, or if this is a filter testing run, remove any setuid privilege the
3553 program has and run as the underlying user.
3555 The exim user is locked out of this, which severely restricts the use of -C
3558 Otherwise, set the real ids to the effective values (should be root unless run
3559 from inetd, which it can either be root or the exim uid, if one is configured).
3561 There is a private mechanism for bypassing some of this, in order to make it
3562 possible to test lots of configurations automatically, without having either to
3563 recompile each time, or to patch in an actual configuration file name and other
3564 values (such as the path name). If running in the test harness, pretend that
3565 configuration file changes and macro definitions haven't happened. */
3568 (!trusted_config || /* Config changed, or */
3569 !macros_trusted()) && /* impermissible macros and */
3570 real_uid != root_uid && /* Not root, and */
3571 !running_in_test_harness /* Not fudged */
3573 expansion_test /* expansion testing */
3575 filter_test != FTEST_NONE) /* Filter testing */
3577 setgroups(group_count, group_list);
3578 exim_setugid(real_uid, real_gid, FALSE,
3579 US"-C, -D, -be or -bf forces real uid");
3580 removed_privilege = TRUE;
3582 /* In the normal case when Exim is called like this, stderr is available
3583 and should be used for any logging information because attempts to write
3584 to the log will usually fail. To arrange this, we unset really_exim. However,
3585 if no stderr is available there is no point - we might as well have a go
3586 at the log (if it fails, syslog will be written).
3588 Note that if the invoker is Exim, the logs remain available. Messing with
3589 this causes unlogged successful deliveries. */
3591 if ((log_stderr != NULL) && (real_uid != exim_uid))
3592 really_exim = FALSE;
3595 /* Privilege is to be retained for the moment. It may be dropped later,
3596 depending on the job that this Exim process has been asked to do. For now, set
3597 the real uid to the effective so that subsequent re-execs of Exim are done by a
3600 else exim_setugid(geteuid(), getegid(), FALSE, US"forcing real = effective");
3602 /* If testing a filter, open the file(s) now, before wasting time doing other
3603 setups and reading the message. */
3605 if ((filter_test & FTEST_SYSTEM) != 0)
3607 filter_sfd = Uopen(filter_test_sfile, O_RDONLY, 0);
3610 fprintf(stderr, "exim: failed to open %s: %s\n", filter_test_sfile,
3612 return EXIT_FAILURE;
3616 if ((filter_test & FTEST_USER) != 0)
3618 filter_ufd = Uopen(filter_test_ufile, O_RDONLY, 0);
3621 fprintf(stderr, "exim: failed to open %s: %s\n", filter_test_ufile,
3623 return EXIT_FAILURE;
3627 /* Initialise lookup_list
3628 If debugging, already called above via version reporting.
3629 In either case, we initialise the list of available lookups while running
3630 as root. All dynamically modules are loaded from a directory which is
3631 hard-coded into the binary and is code which, if not a module, would be
3632 part of Exim already. Ability to modify the content of the directory
3633 is equivalent to the ability to modify a setuid binary!
3635 This needs to happen before we read the main configuration. */
3638 /* Read the main runtime configuration data; this gives up if there
3639 is a failure. It leaves the configuration file open so that the subsequent
3640 configuration data for delivery can be read if needed. */
3644 /* If an action on specific messages is requested, or if a daemon or queue
3645 runner is being started, we need to know if Exim was called by an admin user.
3646 This is the case if the real user is root or exim, or if the real group is
3647 exim, or if one of the supplementary groups is exim or a group listed in
3648 admin_groups. We don't fail all message actions immediately if not admin_user,
3649 since some actions can be performed by non-admin users. Instead, set admin_user
3650 for later interrogation. */
3652 if (real_uid == root_uid || real_uid == exim_uid || real_gid == exim_gid)
3657 for (i = 0; i < group_count; i++)
3659 if (group_list[i] == exim_gid) admin_user = TRUE;
3660 else if (admin_groups != NULL)
3662 for (j = 1; j <= (int)(admin_groups[0]); j++)
3663 if (admin_groups[j] == group_list[i])
3664 { admin_user = TRUE; break; }
3666 if (admin_user) break;
3670 /* Another group of privileged users are the trusted users. These are root,
3671 exim, and any caller matching trusted_users or trusted_groups. Trusted callers
3672 are permitted to specify sender_addresses with -f on the command line, and
3673 other message parameters as well. */
3675 if (real_uid == root_uid || real_uid == exim_uid)
3676 trusted_caller = TRUE;
3681 if (trusted_users != NULL)
3683 for (i = 1; i <= (int)(trusted_users[0]); i++)
3684 if (trusted_users[i] == real_uid)
3685 { trusted_caller = TRUE; break; }
3688 if (!trusted_caller && trusted_groups != NULL)
3690 for (i = 1; i <= (int)(trusted_groups[0]); i++)
3692 if (trusted_groups[i] == real_gid)
3693 trusted_caller = TRUE;
3694 else for (j = 0; j < group_count; j++)
3696 if (trusted_groups[i] == group_list[j])
3697 { trusted_caller = TRUE; break; }
3699 if (trusted_caller) break;
3704 /* Handle the decoding of logging options. */
3706 decode_bits(&log_write_selector, &log_extra_selector, 0, 0,
3707 log_selector_string, log_options, log_options_count, US"log", 0);
3711 debug_printf("configuration file is %s\n", config_main_filename);
3712 debug_printf("log selectors = %08x %08x\n", log_write_selector,
3713 log_extra_selector);
3716 /* If domain literals are not allowed, check the sender address that was
3717 supplied with -f. Ditto for a stripped trailing dot. */
3719 if (sender_address != NULL)
3721 if (sender_address[sender_address_domain] == '[' && !allow_domain_literals)
3723 fprintf(stderr, "exim: bad -f address \"%s\": domain literals not "
3724 "allowed\n", sender_address);
3725 return EXIT_FAILURE;
3727 if (f_end_dot && !strip_trailing_dot)
3729 fprintf(stderr, "exim: bad -f address \"%s.\": domain is malformed "
3730 "(trailing dot not allowed)\n", sender_address);
3731 return EXIT_FAILURE;
3735 /* See if an admin user overrode our logging. */
3737 if (cmdline_syslog_name != NULL)
3741 syslog_processname = cmdline_syslog_name;
3742 log_file_path = string_copy(CUS"syslog");
3746 /* not a panic, non-privileged users should not be able to spam paniclog */
3748 "exim: you lack sufficient privilege to specify syslog process name\n");
3749 return EXIT_FAILURE;
3753 /* Paranoia check of maximum lengths of certain strings. There is a check
3754 on the length of the log file path in log.c, which will come into effect
3755 if there are any calls to write the log earlier than this. However, if we
3756 get this far but the string is very long, it is better to stop now than to
3757 carry on and (e.g.) receive a message and then have to collapse. The call to
3758 log_write() from here will cause the ultimate panic collapse if the complete
3759 file name exceeds the buffer length. */
3761 if (Ustrlen(log_file_path) > 200)
3762 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3763 "log_file_path is longer than 200 chars: aborting");
3765 if (Ustrlen(pid_file_path) > 200)
3766 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3767 "pid_file_path is longer than 200 chars: aborting");
3769 if (Ustrlen(spool_directory) > 200)
3770 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3771 "spool_directory is longer than 200 chars: aborting");
3773 /* Length check on the process name given to syslog for its TAG field,
3774 which is only permitted to be 32 characters or less. See RFC 3164. */
3776 if (Ustrlen(syslog_processname) > 32)
3777 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3778 "syslog_processname is longer than 32 chars: aborting");
3780 /* In some operating systems, the environment variable TMPDIR controls where
3781 temporary files are created; Exim doesn't use these (apart from when delivering
3782 to MBX mailboxes), but called libraries such as DBM libraries may require them.
3783 If TMPDIR is found in the environment, reset it to the value defined in the
3784 TMPDIR macro, if this macro is defined. */
3789 for (p = USS environ; *p != NULL; p++)
3791 if (Ustrncmp(*p, "TMPDIR=", 7) == 0 &&
3792 Ustrcmp(*p+7, TMPDIR) != 0)
3794 uschar *newp = malloc(Ustrlen(TMPDIR) + 8);
3795 sprintf(CS newp, "TMPDIR=%s", TMPDIR);
3797 DEBUG(D_any) debug_printf("reset TMPDIR=%s in environment\n", TMPDIR);
3803 /* Timezone handling. If timezone_string is "utc", set a flag to cause all
3804 timestamps to be in UTC (gmtime() is used instead of localtime()). Otherwise,
3805 we may need to get rid of a bogus timezone setting. This can arise when Exim is
3806 called by a user who has set the TZ variable. This then affects the timestamps
3807 in log files and in Received: headers, and any created Date: header lines. The
3808 required timezone is settable in the configuration file, so nothing can be done
3809 about this earlier - but hopefully nothing will normally be logged earlier than
3810 this. We have to make a new environment if TZ is wrong, but don't bother if
3811 timestamps_utc is set, because then all times are in UTC anyway. */
3813 if (timezone_string != NULL && strcmpic(timezone_string, US"UTC") == 0)
3815 timestamps_utc = TRUE;
3819 uschar *envtz = US getenv("TZ");
3820 if ((envtz == NULL && timezone_string != NULL) ||
3822 (timezone_string == NULL ||
3823 Ustrcmp(timezone_string, envtz) != 0)))
3825 uschar **p = USS environ;
3829 while (*p++ != NULL) count++;
3830 if (envtz == NULL) count++;
3831 newp = new = malloc(sizeof(uschar *) * (count + 1));
3832 for (p = USS environ; *p != NULL; p++)
3834 if (Ustrncmp(*p, "TZ=", 3) == 0) continue;
3837 if (timezone_string != NULL)
3839 *newp = malloc(Ustrlen(timezone_string) + 4);
3840 sprintf(CS *newp++, "TZ=%s", timezone_string);
3845 DEBUG(D_any) debug_printf("Reset TZ to %s: time is %s\n", timezone_string,
3846 tod_stamp(tod_log));
3850 /* Handle the case when we have removed the setuid privilege because of -C or
3851 -D. This means that the caller of Exim was not root.
3853 There is a problem if we were running as the Exim user. The sysadmin may
3854 expect this case to retain privilege because "the binary was called by the
3855 Exim user", but it hasn't, because either the -D option set macros, or the
3856 -C option set a non-trusted configuration file. There are two possibilities:
3858 (1) If deliver_drop_privilege is set, Exim is not going to re-exec in order
3859 to do message deliveries. Thus, the fact that it is running as a
3860 non-privileged user is plausible, and might be wanted in some special
3861 configurations. However, really_exim will have been set false when
3862 privilege was dropped, to stop Exim trying to write to its normal log
3863 files. Therefore, re-enable normal log processing, assuming the sysadmin
3864 has set up the log directory correctly.
3866 (2) If deliver_drop_privilege is not set, the configuration won't work as
3867 apparently intended, and so we log a panic message. In order to retain
3868 root for -C or -D, the caller must either be root or be invoking a
3869 trusted configuration file (when deliver_drop_privilege is false). */
3871 if (removed_privilege && (!trusted_config || macros != NULL) &&
3872 real_uid == exim_uid)
3874 if (deliver_drop_privilege)
3875 really_exim = TRUE; /* let logging work normally */
3877 log_write(0, LOG_MAIN|LOG_PANIC,
3878 "exim user lost privilege for using %s option",
3879 trusted_config? "-D" : "-C");
3882 /* Start up Perl interpreter if Perl support is configured and there is a
3883 perl_startup option, and the configuration or the command line specifies
3884 initializing starting. Note that the global variables are actually called
3885 opt_perl_xxx to avoid clashing with perl's namespace (perl_*). */
3888 if (perl_start_option != 0)
3889 opt_perl_at_start = (perl_start_option > 0);
3890 if (opt_perl_at_start && opt_perl_startup != NULL)
3893 DEBUG(D_any) debug_printf("Starting Perl interpreter\n");
3894 errstr = init_perl(opt_perl_startup);
3897 fprintf(stderr, "exim: error in perl_startup code: %s\n", errstr);
3898 return EXIT_FAILURE;
3900 opt_perl_started = TRUE;
3902 #endif /* EXIM_PERL */
3904 /* Log the arguments of the call if the configuration file said so. This is
3905 a debugging feature for finding out what arguments certain MUAs actually use.
3906 Don't attempt it if logging is disabled, or if listing variables or if
3907 verifying/testing addresses or expansions. */
3909 if (((debug_selector & D_any) != 0 || (log_extra_selector & LX_arguments) != 0)
3910 && really_exim && !list_options && !checking)
3913 uschar *p = big_buffer;
3915 Ustrcpy(p, "cwd= (failed)");
3916 dummy = /* quieten compiler */ getcwd(CS p+4, big_buffer_size - 4);
3918 (void)string_format(p, big_buffer_size - (p - big_buffer), " %d args:", argc);
3920 for (i = 0; i < argc; i++)
3922 int len = Ustrlen(argv[i]);
3925 if (p + len + 8 >= big_buffer + big_buffer_size)
3928 log_write(0, LOG_MAIN, "%s", big_buffer);
3929 Ustrcpy(big_buffer, "...");
3932 printing = string_printing(argv[i]);
3933 if (printing[0] == 0) quote = US"\""; else
3935 uschar *pp = printing;
3937 while (*pp != 0) if (isspace(*pp++)) { quote = US"\""; break; }
3939 sprintf(CS p, " %s%.*s%s", quote, (int)(big_buffer_size -
3940 (p - big_buffer) - 4), printing, quote);
3944 if ((log_extra_selector & LX_arguments) != 0)
3945 log_write(0, LOG_MAIN, "%s", big_buffer);
3947 debug_printf("%s\n", big_buffer);
3950 /* Set the working directory to be the top-level spool directory. We don't rely
3951 on this in the code, which always uses fully qualified names, but it's useful
3952 for core dumps etc. Don't complain if it fails - the spool directory might not
3953 be generally accessible and calls with the -C option (and others) have lost
3954 privilege by now. Before the chdir, we try to ensure that the directory exists.
3957 if (Uchdir(spool_directory) != 0)
3960 (void)directory_make(spool_directory, US"", SPOOL_DIRECTORY_MODE, FALSE);
3961 dummy = /* quieten compiler */ Uchdir(spool_directory);
3964 /* Handle calls with the -bi option. This is a sendmail option to rebuild *the*
3965 alias file. Exim doesn't have such a concept, but this call is screwed into
3966 Sun's YP makefiles. Handle this by calling a configured script, as the real
3967 user who called Exim. The -oA option can be used to pass an argument to the
3972 (void)fclose(config_file);
3973 if (bi_command != NULL)
3977 argv[i++] = bi_command;
3978 if (alias_arg != NULL) argv[i++] = alias_arg;
3981 setgroups(group_count, group_list);
3982 exim_setugid(real_uid, real_gid, FALSE, US"running bi_command");
3984 DEBUG(D_exec) debug_printf("exec %.256s %.256s\n", argv[0],
3985 (argv[1] == NULL)? US"" : argv[1]);
3987 execv(CS argv[0], (char *const *)argv);
3988 fprintf(stderr, "exim: exec failed: %s\n", strerror(errno));
3993 DEBUG(D_any) debug_printf("-bi used but bi_command not set; exiting\n");
3998 /* We moved the admin/trusted check to be immediately after reading the
3999 configuration file. We leave these prints here to ensure that syslog setup,
4000 logfile setup, and so on has already happened. */
4002 if (trusted_caller) DEBUG(D_any) debug_printf("trusted user\n");
4003 if (admin_user) DEBUG(D_any) debug_printf("admin user\n");
4005 /* Only an admin user may start the daemon or force a queue run in the default
4006 configuration, but the queue run restriction can be relaxed. Only an admin
4007 user may request that a message be returned to its sender forthwith. Only an
4008 admin user may specify a debug level greater than D_v (because it might show
4009 passwords, etc. in lookup queries). Only an admin user may request a queue
4010 count. Only an admin user can use the test interface to scan for email
4011 (because Exim will be in the spool dir and able to look at mails). */
4015 BOOL debugset = (debug_selector & ~D_v) != 0;
4016 if (deliver_give_up || daemon_listen || malware_test_file ||
4017 (count_queue && queue_list_requires_admin) ||
4018 (list_queue && queue_list_requires_admin) ||
4019 (queue_interval >= 0 && prod_requires_admin) ||
4020 (debugset && !running_in_test_harness))
4022 fprintf(stderr, "exim:%s permission denied\n", debugset? " debugging" : "");
4027 /* If the real user is not root or the exim uid, the argument for passing
4028 in an open TCP/IP connection for another message is not permitted, nor is
4029 running with the -N option for any delivery action, unless this call to exim is
4030 one that supplied an input message, or we are using a patched exim for
4031 regression testing. */
4033 if (real_uid != root_uid && real_uid != exim_uid &&
4034 (continue_hostname != NULL ||
4036 (queue_interval >= 0 || daemon_listen || msg_action_arg > 0)
4037 )) && !running_in_test_harness)
4039 fprintf(stderr, "exim: Permission denied\n");
4040 return EXIT_FAILURE;
4043 /* If the caller is not trusted, certain arguments are ignored when running for
4044 real, but are permitted when checking things (-be, -bv, -bt, -bh, -bf, -bF).
4045 Note that authority for performing certain actions on messages is tested in the
4046 queue_action() function. */
4048 if (!trusted_caller && !checking && filter_test == FTEST_NONE)
4050 sender_host_name = sender_host_address = interface_address =
4051 sender_ident = received_protocol = NULL;
4052 sender_host_port = interface_port = 0;
4053 sender_host_authenticated = authenticated_sender = authenticated_id = NULL;
4056 /* If a sender host address is set, extract the optional port number off the
4057 end of it and check its syntax. Do the same thing for the interface address.
4058 Exim exits if the syntax is bad. */
4062 if (sender_host_address != NULL)
4063 sender_host_port = check_port(sender_host_address);
4064 if (interface_address != NULL)
4065 interface_port = check_port(interface_address);
4068 /* If the caller is trusted, then they can use -G to suppress_local_fixups. */
4073 suppress_local_fixups = suppress_local_fixups_default = TRUE;
4074 DEBUG(D_acl) debug_printf("suppress_local_fixups forced on by -G\n");
4078 fprintf(stderr, "exim: permission denied (-G requires a trusted user)\n");
4079 return EXIT_FAILURE;
4083 /* If an SMTP message is being received check to see if the standard input is a
4084 TCP/IP socket. If it is, we assume that Exim was called from inetd if the
4085 caller is root or the Exim user, or if the port is a privileged one. Otherwise,
4090 union sockaddr_46 inetd_sock;
4091 EXIM_SOCKLEN_T size = sizeof(inetd_sock);
4092 if (getpeername(0, (struct sockaddr *)(&inetd_sock), &size) == 0)
4094 int family = ((struct sockaddr *)(&inetd_sock))->sa_family;
4095 if (family == AF_INET || family == AF_INET6)
4097 union sockaddr_46 interface_sock;
4098 size = sizeof(interface_sock);
4100 if (getsockname(0, (struct sockaddr *)(&interface_sock), &size) == 0)
4101 interface_address = host_ntoa(-1, &interface_sock, NULL,
4104 if (host_is_tls_on_connect_port(interface_port)) tls_in.on_connect = TRUE;
4106 if (real_uid == root_uid || real_uid == exim_uid || interface_port < 1024)
4109 sender_host_address = host_ntoa(-1, (struct sockaddr *)(&inetd_sock),
4110 NULL, &sender_host_port);
4111 if (mua_wrapper) log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Input from "
4112 "inetd is not supported when mua_wrapper is set");
4117 "exim: Permission denied (unprivileged user, unprivileged port)\n");
4118 return EXIT_FAILURE;
4124 /* If the load average is going to be needed while receiving a message, get it
4125 now for those OS that require the first call to os_getloadavg() to be done as
4126 root. There will be further calls later for each message received. */
4128 #ifdef LOAD_AVG_NEEDS_ROOT
4129 if (receiving_message &&
4130 (queue_only_load >= 0 ||
4131 (is_inetd && smtp_load_reserve >= 0)
4134 load_average = OS_GETLOADAVG();
4138 /* The queue_only configuration option can be overridden by -odx on the command
4139 line, except that if queue_only_override is false, queue_only cannot be unset
4140 from the command line. */
4142 if (queue_only_set && (queue_only_override || arg_queue_only))
4143 queue_only = arg_queue_only;
4145 /* The receive_timeout and smtp_receive_timeout options can be overridden by
4148 if (arg_receive_timeout >= 0) receive_timeout = arg_receive_timeout;
4149 if (arg_smtp_receive_timeout >= 0)
4150 smtp_receive_timeout = arg_smtp_receive_timeout;
4152 /* If Exim was started with root privilege, unless we have already removed the
4153 root privilege above as a result of -C, -D, -be, -bf or -bF, remove it now
4154 except when starting the daemon or doing some kind of delivery or address
4155 testing (-bt). These are the only cases when root need to be retained. We run
4156 as exim for -bv and -bh. However, if deliver_drop_privilege is set, root is
4157 retained only for starting the daemon. We always do the initgroups() in this
4158 situation (controlled by the TRUE below), in order to be as close as possible
4159 to the state Exim usually runs in. */
4161 if (!unprivileged && /* originally had root AND */
4162 !removed_privilege && /* still got root AND */
4163 !daemon_listen && /* not starting the daemon */
4164 queue_interval <= 0 && /* (either kind of daemon) */
4166 deliver_drop_privilege || /* requested unprivileged */
4168 queue_interval < 0 && /* not running the queue */
4169 (msg_action_arg < 0 || /* and */
4170 msg_action != MSG_DELIVER) && /* not delivering and */
4171 (!checking || !address_test_mode) /* not address checking */
4175 exim_setugid(exim_uid, exim_gid, TRUE, US"privilege not needed");
4178 /* When we are retaining a privileged uid, we still change to the exim gid. */
4183 rv = setgid(exim_gid);
4184 /* Impact of failure is that some stuff might end up with an incorrect group.
4185 We track this for failures from root, since any attempt to change privilege
4186 by root should succeed and failures should be examined. For non-root,
4187 there's no security risk. For me, it's { exim -bV } on a just-built binary,
4188 no need to complain then. */
4191 if (!(unprivileged || removed_privilege))
4194 "exim: changing group failed: %s\n", strerror(errno));
4198 DEBUG(D_any) debug_printf("changing group to %ld failed: %s\n",
4199 (long int)exim_gid, strerror(errno));
4203 /* Handle a request to scan a file for malware */
4204 if (malware_test_file)
4206 #ifdef WITH_CONTENT_SCAN
4208 set_process_info("scanning file for malware");
4209 result = malware_in_file(malware_test_file);
4212 printf("No malware found.\n");
4217 printf("Malware lookup returned non-okay/fail: %d\n", result);
4221 printf("Malware found: %s\n", malware_name);
4223 printf("Malware scan detected malware of unknown name.\n");
4225 printf("Malware scanning not enabled at compile time.\n");
4230 /* Handle a request to list the delivery queue */
4234 set_process_info("listing the queue");
4235 queue_list(list_queue_option, argv + recipients_arg, argc - recipients_arg);
4239 /* Handle a request to count the delivery queue */
4243 set_process_info("counting the queue");
4248 /* Handle actions on specific messages, except for the force delivery and
4249 message load actions, which are done below. Some actions take a whole list of
4250 message ids, which are known to continue up to the end of the arguments. Others
4251 take a single message id and then operate on the recipients list. */
4253 if (msg_action_arg > 0 && msg_action != MSG_DELIVER && msg_action != MSG_LOAD)
4255 int yield = EXIT_SUCCESS;
4256 set_process_info("acting on specified messages");
4258 if (!one_msg_action)
4260 for (i = msg_action_arg; i < argc; i++)
4261 if (!queue_action(argv[i], msg_action, NULL, 0, 0))
4262 yield = EXIT_FAILURE;
4265 else if (!queue_action(argv[msg_action_arg], msg_action, argv, argc,
4266 recipients_arg)) yield = EXIT_FAILURE;
4270 /* All the modes below here require the remaining configuration sections
4271 to be read, except that we can skip over the ACL setting when delivering
4272 specific messages, or doing a queue run. (For various testing cases we could
4273 skip too, but as they are rare, it doesn't really matter.) The argument is TRUE
4276 readconf_rest(msg_action_arg > 0 || (queue_interval == 0 && !daemon_listen));
4278 /* The configuration data will have been read into POOL_PERM because we won't
4279 ever want to reset back past it. Change the current pool to POOL_MAIN. In fact,
4280 this is just a bit of pedantic tidiness. It wouldn't really matter if the
4281 configuration were read into POOL_MAIN, because we don't do any resets till
4282 later on. However, it seems right, and it does ensure that both pools get used.
4285 store_pool = POOL_MAIN;
4287 /* Handle the -brt option. This is for checking out retry configurations.
4288 The next three arguments are a domain name or a complete address, and
4289 optionally two error numbers. All it does is to call the function that
4290 scans the retry configuration data. */
4292 if (test_retry_arg >= 0)
4294 retry_config *yield;
4295 int basic_errno = 0;
4299 if (test_retry_arg >= argc)
4301 printf("-brt needs a domain or address argument\n");
4302 exim_exit(EXIT_FAILURE);
4304 s1 = argv[test_retry_arg++];
4307 /* If the first argument contains no @ and no . it might be a local user
4308 or it might be a single-component name. Treat as a domain. */
4310 if (Ustrchr(s1, '@') == NULL && Ustrchr(s1, '.') == NULL)
4312 printf("Warning: \"%s\" contains no '@' and no '.' characters. It is "
4313 "being \ntreated as a one-component domain, not as a local part.\n\n",
4317 /* There may be an optional second domain arg. */
4319 if (test_retry_arg < argc && Ustrchr(argv[test_retry_arg], '.') != NULL)
4320 s2 = argv[test_retry_arg++];
4322 /* The final arg is an error name */
4324 if (test_retry_arg < argc)
4326 uschar *ss = argv[test_retry_arg];
4328 readconf_retry_error(ss, ss + Ustrlen(ss), &basic_errno, &more_errno);
4331 printf("%s\n", CS error);
4332 return EXIT_FAILURE;
4335 /* For the {MAIL,RCPT,DATA}_4xx errors, a value of 255 means "any", and a
4336 code > 100 as an error is for matching codes to the decade. Turn them into
4337 a real error code, off the decade. */
4339 if (basic_errno == ERRNO_MAIL4XX ||
4340 basic_errno == ERRNO_RCPT4XX ||
4341 basic_errno == ERRNO_DATA4XX)
4343 int code = (more_errno >> 8) & 255;
4345 more_errno = (more_errno & 0xffff00ff) | (21 << 8);
4346 else if (code > 100)
4347 more_errno = (more_errno & 0xffff00ff) | ((code - 96) << 8);
4351 yield = retry_find_config(s1, s2, basic_errno, more_errno);
4352 if (yield == NULL) printf("No retry information found\n"); else
4355 more_errno = yield->more_errno;
4356 printf("Retry rule: %s ", yield->pattern);
4358 if (yield->basic_errno == ERRNO_EXIMQUOTA)
4360 printf("quota%s%s ",
4361 (more_errno > 0)? "_" : "",
4362 (more_errno > 0)? readconf_printtime(more_errno) : US"");
4364 else if (yield->basic_errno == ECONNREFUSED)
4366 printf("refused%s%s ",
4367 (more_errno > 0)? "_" : "",
4368 (more_errno == 'M')? "MX" :
4369 (more_errno == 'A')? "A" : "");
4371 else if (yield->basic_errno == ETIMEDOUT)
4374 if ((more_errno & RTEF_CTOUT) != 0) printf("_connect");
4376 if (more_errno != 0) printf("_%s",
4377 (more_errno == 'M')? "MX" : "A");
4380 else if (yield->basic_errno == ERRNO_AUTHFAIL)
4381 printf("auth_failed ");
4384 for (r = yield->rules; r != NULL; r = r->next)
4386 printf("%c,%s", r->rule, readconf_printtime(r->timeout)); /* Do not */
4387 printf(",%s", readconf_printtime(r->p1)); /* amalgamate */
4393 printf(",%d.", x/1000);
4407 exim_exit(EXIT_SUCCESS);
4410 /* Handle a request to list one or more configuration options */
4411 /* If -n was set, we suppress some information */
4415 set_process_info("listing variables");
4416 if (recipients_arg >= argc) readconf_print(US"all", NULL, flag_n);
4417 else for (i = recipients_arg; i < argc; i++)
4420 (Ustrcmp(argv[i], "router") == 0 ||
4421 Ustrcmp(argv[i], "transport") == 0 ||
4422 Ustrcmp(argv[i], "authenticator") == 0 ||
4423 Ustrcmp(argv[i], "macro") == 0))
4425 readconf_print(argv[i+1], argv[i], flag_n);
4428 else readconf_print(argv[i], NULL, flag_n);
4430 exim_exit(EXIT_SUCCESS);
4434 /* Handle a request to deliver one or more messages that are already on the
4435 queue. Values of msg_action other than MSG_DELIVER and MSG_LOAD are dealt with
4436 above. MSG_LOAD is handled with -be (which is the only time it applies) below.
4438 Delivery of specific messages is typically used for a small number when
4439 prodding by hand (when the option forced_delivery will be set) or when
4440 re-execing to regain root privilege. Each message delivery must happen in a
4441 separate process, so we fork a process for each one, and run them sequentially
4442 so that debugging output doesn't get intertwined, and to avoid spawning too
4443 many processes if a long list is given. However, don't fork for the last one;
4444 this saves a process in the common case when Exim is called to deliver just one
4447 if (msg_action_arg > 0 && msg_action != MSG_LOAD)
4449 if (prod_requires_admin && !admin_user)
4451 fprintf(stderr, "exim: Permission denied\n");
4452 exim_exit(EXIT_FAILURE);
4454 set_process_info("delivering specified messages");
4455 if (deliver_give_up) forced_delivery = deliver_force_thaw = TRUE;
4456 for (i = msg_action_arg; i < argc; i++)
4461 (void)deliver_message(argv[i], forced_delivery, deliver_give_up);
4462 else if ((pid = fork()) == 0)
4464 (void)deliver_message(argv[i], forced_delivery, deliver_give_up);
4465 _exit(EXIT_SUCCESS);
4469 fprintf(stderr, "failed to fork delivery process for %s: %s\n", argv[i],
4471 exim_exit(EXIT_FAILURE);
4475 exim_exit(EXIT_SUCCESS);
4479 /* If only a single queue run is requested, without SMTP listening, we can just
4480 turn into a queue runner, with an optional starting message id. */
4482 if (queue_interval == 0 && !daemon_listen)
4484 DEBUG(D_queue_run) debug_printf("Single queue run%s%s%s%s\n",
4485 (start_queue_run_id == NULL)? US"" : US" starting at ",
4486 (start_queue_run_id == NULL)? US"" : start_queue_run_id,
4487 (stop_queue_run_id == NULL)? US"" : US" stopping at ",
4488 (stop_queue_run_id == NULL)? US"" : stop_queue_run_id);
4489 set_process_info("running the queue (single queue run)");
4490 queue_run(start_queue_run_id, stop_queue_run_id, FALSE);
4491 exim_exit(EXIT_SUCCESS);
4495 /* Find the login name of the real user running this process. This is always
4496 needed when receiving a message, because it is written into the spool file. It
4497 may also be used to construct a from: or a sender: header, and in this case we
4498 need the user's full name as well, so save a copy of it, checked for RFC822
4499 syntax and munged if necessary, if it hasn't previously been set by the -F
4500 argument. We may try to get the passwd entry more than once, in case NIS or
4501 other delays are in evidence. Save the home directory for use in filter testing
4506 if ((pw = getpwuid(real_uid)) != NULL)
4508 originator_login = string_copy(US pw->pw_name);
4509 originator_home = string_copy(US pw->pw_dir);
4511 /* If user name has not been set by -F, set it from the passwd entry
4512 unless -f has been used to set the sender address by a trusted user. */
4514 if (originator_name == NULL)
4516 if (sender_address == NULL ||
4517 (!trusted_caller && filter_test == FTEST_NONE))
4519 uschar *name = US pw->pw_gecos;
4520 uschar *amp = Ustrchr(name, '&');
4523 /* Most Unix specify that a '&' character in the gecos field is
4524 replaced by a copy of the login name, and some even specify that
4525 the first character should be upper cased, so that's what we do. */
4530 string_format(buffer, sizeof(buffer), "%.*s%n%s%s",
4531 amp - name, name, &loffset, originator_login, amp + 1);
4532 buffer[loffset] = toupper(buffer[loffset]);
4536 /* If a pattern for matching the gecos field was supplied, apply
4537 it and then expand the name string. */
4539 if (gecos_pattern != NULL && gecos_name != NULL)
4542 re = regex_must_compile(gecos_pattern, FALSE, TRUE); /* Use malloc */
4544 if (regex_match_and_setup(re, name, 0, -1))
4546 uschar *new_name = expand_string(gecos_name);
4548 if (new_name != NULL)
4550 DEBUG(D_receive) debug_printf("user name \"%s\" extracted from "
4551 "gecos field \"%s\"\n", new_name, name);
4554 else DEBUG(D_receive) debug_printf("failed to expand gecos_name string "
4555 "\"%s\": %s\n", gecos_name, expand_string_message);
4557 else DEBUG(D_receive) debug_printf("gecos_pattern \"%s\" did not match "
4558 "gecos field \"%s\"\n", gecos_pattern, name);
4559 store_free((void *)re);
4561 originator_name = string_copy(name);
4564 /* A trusted caller has used -f but not -F */
4566 else originator_name = US"";
4569 /* Break the retry loop */
4574 if (++i > finduser_retries) break;
4578 /* If we cannot get a user login, log the incident and give up, unless the
4579 configuration specifies something to use. When running in the test harness,
4580 any setting of unknown_login overrides the actual name. */
4582 if (originator_login == NULL || running_in_test_harness)
4584 if (unknown_login != NULL)
4586 originator_login = expand_string(unknown_login);
4587 if (originator_name == NULL && unknown_username != NULL)
4588 originator_name = expand_string(unknown_username);
4589 if (originator_name == NULL) originator_name = US"";
4591 if (originator_login == NULL)
4592 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Failed to get user name for uid %d",
4596 /* Ensure that the user name is in a suitable form for use as a "phrase" in an
4599 originator_name = string_copy(parse_fix_phrase(originator_name,
4600 Ustrlen(originator_name), big_buffer, big_buffer_size));
4602 /* If a message is created by this call of Exim, the uid/gid of its originator
4603 are those of the caller. These values are overridden if an existing message is
4604 read in from the spool. */
4606 originator_uid = real_uid;
4607 originator_gid = real_gid;
4609 DEBUG(D_receive) debug_printf("originator: uid=%d gid=%d login=%s name=%s\n",
4610 (int)originator_uid, (int)originator_gid, originator_login, originator_name);
4612 /* Run in daemon and/or queue-running mode. The function daemon_go() never
4613 returns. We leave this till here so that the originator_ fields are available
4614 for incoming messages via the daemon. The daemon cannot be run in mua_wrapper
4617 if (daemon_listen || inetd_wait_mode || queue_interval > 0)
4621 fprintf(stderr, "Daemon cannot be run when mua_wrapper is set\n");
4622 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Daemon cannot be run when "
4623 "mua_wrapper is set");
4628 /* If the sender ident has not been set (by a trusted caller) set it to
4629 the caller. This will get overwritten below for an inetd call. If a trusted
4630 caller has set it empty, unset it. */
4632 if (sender_ident == NULL) sender_ident = originator_login;
4633 else if (sender_ident[0] == 0) sender_ident = NULL;
4635 /* Handle the -brw option, which is for checking out rewriting rules. Cause log
4636 writes (on errors) to go to stderr instead. Can't do this earlier, as want the
4637 originator_* variables set. */
4639 if (test_rewrite_arg >= 0)
4641 really_exim = FALSE;
4642 if (test_rewrite_arg >= argc)
4644 printf("-brw needs an address argument\n");
4645 exim_exit(EXIT_FAILURE);
4647 rewrite_test(argv[test_rewrite_arg]);
4648 exim_exit(EXIT_SUCCESS);
4651 /* A locally-supplied message is considered to be coming from a local user
4652 unless a trusted caller supplies a sender address with -f, or is passing in the
4653 message via SMTP (inetd invocation or otherwise). */
4655 if ((sender_address == NULL && !smtp_input) ||
4656 (!trusted_caller && filter_test == FTEST_NONE))
4658 sender_local = TRUE;
4660 /* A trusted caller can supply authenticated_sender and authenticated_id
4661 via -oMas and -oMai and if so, they will already be set. Otherwise, force
4662 defaults except when host checking. */
4664 if (authenticated_sender == NULL && !host_checking)
4665 authenticated_sender = string_sprintf("%s@%s", originator_login,
4666 qualify_domain_sender);
4667 if (authenticated_id == NULL && !host_checking)
4668 authenticated_id = originator_login;
4671 /* Trusted callers are always permitted to specify the sender address.
4672 Untrusted callers may specify it if it matches untrusted_set_sender, or if what
4673 is specified is the empty address. However, if a trusted caller does not
4674 specify a sender address for SMTP input, we leave sender_address unset. This
4675 causes the MAIL commands to be honoured. */
4677 if ((!smtp_input && sender_address == NULL) ||
4678 !receive_check_set_sender(sender_address))
4680 /* Either the caller is not permitted to set a general sender, or this is
4681 non-SMTP input and the trusted caller has not set a sender. If there is no
4682 sender, or if a sender other than <> is set, override with the originator's
4683 login (which will get qualified below), except when checking things. */
4685 if (sender_address == NULL /* No sender_address set */
4687 (sender_address[0] != 0 && /* Non-empty sender address, AND */
4688 !checking && /* Not running tests, AND */
4689 filter_test == FTEST_NONE)) /* Not testing a filter */
4691 sender_address = originator_login;
4692 sender_address_forced = FALSE;
4693 sender_address_domain = 0;
4697 /* Remember whether an untrusted caller set the sender address */
4699 sender_set_untrusted = sender_address != originator_login && !trusted_caller;
4701 /* Ensure that the sender address is fully qualified unless it is the empty
4702 address, which indicates an error message, or doesn't exist (root caller, smtp
4703 interface, no -f argument). */
4705 if (sender_address != NULL && sender_address[0] != 0 &&
4706 sender_address_domain == 0)
4707 sender_address = string_sprintf("%s@%s", local_part_quote(sender_address),
4708 qualify_domain_sender);
4710 DEBUG(D_receive) debug_printf("sender address = %s\n", sender_address);
4712 /* Handle a request to verify a list of addresses, or test them for delivery.
4713 This must follow the setting of the sender address, since routers can be
4714 predicated upon the sender. If no arguments are given, read addresses from
4715 stdin. Set debug_level to at least D_v to get full output for address testing.
4718 if (verify_address_mode || address_test_mode)
4721 int flags = vopt_qualify;
4723 if (verify_address_mode)
4725 if (!verify_as_sender) flags |= vopt_is_recipient;
4726 DEBUG(D_verify) debug_print_ids(US"Verifying:");
4731 flags |= vopt_is_recipient;
4732 debug_selector |= D_v;
4733 debug_file = stderr;
4734 debug_fd = fileno(debug_file);
4735 DEBUG(D_verify) debug_print_ids(US"Address testing:");
4738 if (recipients_arg < argc)
4740 while (recipients_arg < argc)
4742 uschar *s = argv[recipients_arg++];
4745 BOOL finished = FALSE;
4746 uschar *ss = parse_find_address_end(s, FALSE);
4747 if (*ss == ',') *ss = 0; else finished = TRUE;
4748 test_address(s, flags, &exit_value);
4751 while (*(++s) != 0 && (*s == ',' || isspace(*s)));
4758 uschar *s = get_stdinput(NULL, NULL);
4759 if (s == NULL) break;
4760 test_address(s, flags, &exit_value);
4764 exim_exit(exit_value);
4767 /* Handle expansion checking. Either expand items on the command line, or read
4768 from stdin if there aren't any. If -Mset was specified, load the message so
4769 that its variables can be used, but restrict this facility to admin users.
4770 Otherwise, if -bem was used, read a message from stdin. */
4774 if (msg_action_arg > 0 && msg_action == MSG_LOAD)
4776 uschar spoolname[256]; /* Not big_buffer; used in spool_read_header() */
4779 fprintf(stderr, "exim: permission denied\n");
4782 message_id = argv[msg_action_arg];
4783 (void)string_format(spoolname, sizeof(spoolname), "%s-H", message_id);
4784 if (!spool_open_datafile(message_id))
4785 printf ("Failed to load message datafile %s\n", message_id);
4786 if (spool_read_header(spoolname, TRUE, FALSE) != spool_read_OK)
4787 printf ("Failed to load message %s\n", message_id);
4790 /* Read a test message from a file. We fudge it up to be on stdin, saving
4791 stdin itself for later reading of expansion strings. */
4793 else if (expansion_test_message != NULL)
4795 int save_stdin = dup(0);
4796 int fd = Uopen(expansion_test_message, O_RDONLY, 0);
4799 fprintf(stderr, "exim: failed to open %s: %s\n", expansion_test_message,
4801 return EXIT_FAILURE;
4804 filter_test = FTEST_USER; /* Fudge to make it look like filter test */
4805 message_ended = END_NOTENDED;
4806 read_message_body(receive_msg(extract_recipients));
4807 message_linecount += body_linecount;
4808 (void)dup2(save_stdin, 0);
4809 (void)close(save_stdin);
4810 clearerr(stdin); /* Required by Darwin */
4813 /* Allow $recipients for this testing */
4815 enable_dollar_recipients = TRUE;
4817 /* Expand command line items */
4819 if (recipients_arg < argc)
4821 while (recipients_arg < argc)
4823 uschar *s = argv[recipients_arg++];
4824 uschar *ss = expand_string(s);
4825 if (ss == NULL) printf ("Failed: %s\n", expand_string_message);
4826 else printf("%s\n", CS ss);
4834 char *(*fn_readline)(const char *) = NULL;
4835 void (*fn_addhist)(const char *) = NULL;
4838 void *dlhandle = set_readline(&fn_readline, &fn_addhist);
4844 uschar *source = get_stdinput(fn_readline, fn_addhist);
4845 if (source == NULL) break;
4846 ss = expand_string(source);
4848 printf ("Failed: %s\n", expand_string_message);
4849 else printf("%s\n", CS ss);
4853 if (dlhandle != NULL) dlclose(dlhandle);
4857 /* The data file will be open after -Mset */
4859 if (deliver_datafile >= 0)
4861 (void)close(deliver_datafile);
4862 deliver_datafile = -1;
4865 exim_exit(EXIT_SUCCESS);
4869 /* The active host name is normally the primary host name, but it can be varied
4870 for hosts that want to play several parts at once. We need to ensure that it is
4871 set for host checking, and for receiving messages. */
4873 smtp_active_hostname = primary_hostname;
4874 if (raw_active_hostname != NULL)
4876 uschar *nah = expand_string(raw_active_hostname);
4879 if (!expand_string_forcedfail)
4880 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to expand \"%s\" "
4881 "(smtp_active_hostname): %s", raw_active_hostname,
4882 expand_string_message);
4884 else if (nah[0] != 0) smtp_active_hostname = nah;
4887 /* Handle host checking: this facility mocks up an incoming SMTP call from a
4888 given IP address so that the blocking and relay configuration can be tested.
4889 Unless a sender_ident was set by -oMt, we discard it (the default is the
4890 caller's login name). An RFC 1413 call is made only if we are running in the
4891 test harness and an incoming interface and both ports are specified, because
4892 there is no TCP/IP call to find the ident for. */
4899 if (!sender_ident_set)
4901 sender_ident = NULL;
4902 if (running_in_test_harness && sender_host_port != 0 &&
4903 interface_address != NULL && interface_port != 0)
4904 verify_get_ident(1413);
4907 /* In case the given address is a non-canonical IPv6 address, canonicize
4908 it. The code works for both IPv4 and IPv6, as it happens. */
4910 size = host_aton(sender_host_address, x);
4911 sender_host_address = store_get(48); /* large enough for full IPv6 */
4912 (void)host_nmtoa(size, x, -1, sender_host_address, ':');
4914 /* Now set up for testing */
4916 host_build_sender_fullhost();
4920 sender_local = FALSE;
4921 sender_host_notsocket = TRUE;
4922 debug_file = stderr;
4923 debug_fd = fileno(debug_file);
4924 fprintf(stdout, "\n**** SMTP testing session as if from host %s\n"
4925 "**** but without any ident (RFC 1413) callback.\n"
4926 "**** This is not for real!\n\n",
4927 sender_host_address);
4929 if (verify_check_host(&hosts_connection_nolog) == OK)
4930 log_write_selector &= ~L_smtp_connection;
4931 log_write(L_smtp_connection, LOG_MAIN, "%s", smtp_get_connection_info());
4933 /* NOTE: We do *not* call smtp_log_no_mail() if smtp_start_session() fails,
4934 because a log line has already been written for all its failure exists
4935 (usually "connection refused: <reason>") and writing another one is
4936 unnecessary clutter. */
4938 if (smtp_start_session())
4940 reset_point = store_get(0);
4943 store_reset(reset_point);
4944 if (smtp_setup_msg() <= 0) break;
4945 if (!receive_msg(FALSE)) break;
4949 exim_exit(EXIT_SUCCESS);
4953 /* Arrange for message reception if recipients or SMTP were specified;
4954 otherwise complain unless a version print (-bV) happened or this is a filter
4955 verification test or info dump.
4956 In the former case, show the configuration file name. */
4958 if (recipients_arg >= argc && !extract_recipients && !smtp_input)
4960 if (version_printed)
4962 printf("Configuration file is %s\n", config_main_filename);
4963 return EXIT_SUCCESS;
4966 if (info_flag != CMDINFO_NONE)
4968 show_exim_information(info_flag, info_stdout ? stdout : stderr);
4969 return info_stdout ? EXIT_SUCCESS : EXIT_FAILURE;
4972 if (filter_test == FTEST_NONE)
4973 exim_usage(called_as);
4977 /* If mua_wrapper is set, Exim is being used to turn an MUA that submits on the
4978 standard input into an MUA that submits to a smarthost over TCP/IP. We know
4979 that we are not called from inetd, because that is rejected above. The
4980 following configuration settings are forced here:
4982 (1) Synchronous delivery (-odi)
4983 (2) Errors to stderr (-oep == -oeq)
4984 (3) No parallel remote delivery
4985 (4) Unprivileged delivery
4987 We don't force overall queueing options because there are several of them;
4988 instead, queueing is avoided below when mua_wrapper is set. However, we do need
4989 to override any SMTP queueing. */
4993 synchronous_delivery = TRUE;
4994 arg_error_handling = ERRORS_STDERR;
4995 remote_max_parallel = 1;
4996 deliver_drop_privilege = TRUE;
4998 queue_smtp_domains = NULL;
5002 /* Prepare to accept one or more new messages on the standard input. When a
5003 message has been read, its id is returned in message_id[]. If doing immediate
5004 delivery, we fork a delivery process for each received message, except for the
5005 last one, where we can save a process switch.
5007 It is only in non-smtp mode that error_handling is allowed to be changed from
5008 its default of ERRORS_SENDER by argument. (Idle thought: are any of the
5009 sendmail error modes other than -oem ever actually used? Later: yes.) */
5011 if (!smtp_input) error_handling = arg_error_handling;
5013 /* If this is an inetd call, ensure that stderr is closed to prevent panic
5014 logging being sent down the socket and make an identd call to get the
5019 (void)fclose(stderr);
5020 exim_nullstd(); /* Re-open to /dev/null */
5021 verify_get_ident(IDENT_PORT);
5022 host_build_sender_fullhost();
5023 set_process_info("handling incoming connection from %s via inetd",
5027 /* If the sender host address has been set, build sender_fullhost if it hasn't
5028 already been done (which it will have been for inetd). This caters for the
5029 case when it is forced by -oMa. However, we must flag that it isn't a socket,
5030 so that the test for IP options is skipped for -bs input. */
5032 if (sender_host_address != NULL && sender_fullhost == NULL)
5034 host_build_sender_fullhost();
5035 set_process_info("handling incoming connection from %s via -oMa",
5037 sender_host_notsocket = TRUE;
5040 /* Otherwise, set the sender host as unknown except for inetd calls. This
5041 prevents host checking in the case of -bs not from inetd and also for -bS. */
5043 else if (!is_inetd) sender_host_unknown = TRUE;
5045 /* If stdout does not exist, then dup stdin to stdout. This can happen
5046 if exim is started from inetd. In this case fd 0 will be set to the socket,
5047 but fd 1 will not be set. This also happens for passed SMTP channels. */
5049 if (fstat(1, &statbuf) < 0) (void)dup2(0, 1);
5051 /* Set up the incoming protocol name and the state of the program. Root is
5052 allowed to force received protocol via the -oMr option above. If we have come
5053 via inetd, the process info has already been set up. We don't set
5054 received_protocol here for smtp input, as it varies according to
5055 batch/HELO/EHLO/AUTH/TLS. */
5059 if (!is_inetd) set_process_info("accepting a local %sSMTP message from <%s>",
5060 smtp_batched_input? "batched " : "",
5061 (sender_address!= NULL)? sender_address : originator_login);
5065 if (received_protocol == NULL)
5066 received_protocol = string_sprintf("local%s", called_as);
5067 set_process_info("accepting a local non-SMTP message from <%s>",
5071 /* Initialize the session_local_queue-only flag (this will be ignored if
5072 mua_wrapper is set) */
5075 session_local_queue_only = queue_only;
5077 /* For non-SMTP and for batched SMTP input, check that there is enough space on
5078 the spool if so configured. On failure, we must not attempt to send an error
5079 message! (For interactive SMTP, the check happens at MAIL FROM and an SMTP
5080 error code is given.) */
5082 if ((!smtp_input || smtp_batched_input) && !receive_check_fs(0))
5084 fprintf(stderr, "exim: insufficient disk space\n");
5085 return EXIT_FAILURE;
5088 /* If this is smtp input of any kind, real or batched, handle the start of the
5091 NOTE: We do *not* call smtp_log_no_mail() if smtp_start_session() fails,
5092 because a log line has already been written for all its failure exists
5093 (usually "connection refused: <reason>") and writing another one is
5094 unnecessary clutter. */
5100 if (verify_check_host(&hosts_connection_nolog) == OK)
5101 log_write_selector &= ~L_smtp_connection;
5102 log_write(L_smtp_connection, LOG_MAIN, "%s", smtp_get_connection_info());
5103 if (!smtp_start_session())
5106 exim_exit(EXIT_SUCCESS);
5110 /* Otherwise, set up the input size limit here. */
5114 thismessage_size_limit = expand_string_integer(message_size_limit, TRUE);
5115 if (expand_string_message != NULL)
5117 if (thismessage_size_limit == -1)
5118 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to expand "
5119 "message_size_limit: %s", expand_string_message);
5121 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "invalid value for "
5122 "message_size_limit: %s", expand_string_message);
5126 /* Loop for several messages when reading SMTP input. If we fork any child
5127 processes, we don't want to wait for them unless synchronous delivery is
5128 requested, so set SIGCHLD to SIG_IGN in that case. This is not necessarily the
5129 same as SIG_DFL, despite the fact that documentation often lists the default as
5130 "ignore". This is a confusing area. This is what I know:
5132 At least on some systems (e.g. Solaris), just setting SIG_IGN causes child
5133 processes that complete simply to go away without ever becoming defunct. You
5134 can't then wait for them - but we don't want to wait for them in the
5135 non-synchronous delivery case. However, this behaviour of SIG_IGN doesn't
5136 happen for all OS (e.g. *BSD is different).
5138 But that's not the end of the story. Some (many? all?) systems have the
5139 SA_NOCLDWAIT option for sigaction(). This requests the behaviour that Solaris
5140 has by default, so it seems that the difference is merely one of default
5141 (compare restarting vs non-restarting signals).
5143 To cover all cases, Exim sets SIG_IGN with SA_NOCLDWAIT here if it can. If not,
5144 it just sets SIG_IGN. To be on the safe side it also calls waitpid() at the end
5145 of the loop below. Paranoia rules.
5147 February 2003: That's *still* not the end of the story. There are now versions
5148 of Linux (where SIG_IGN does work) that are picky. If, having set SIG_IGN, a
5149 process then calls waitpid(), a grumble is written to the system log, because
5150 this is logically inconsistent. In other words, it doesn't like the paranoia.
5151 As a consequenc of this, the waitpid() below is now excluded if we are sure
5152 that SIG_IGN works. */
5154 if (!synchronous_delivery)
5157 struct sigaction act;
5158 act.sa_handler = SIG_IGN;
5159 sigemptyset(&(act.sa_mask));
5160 act.sa_flags = SA_NOCLDWAIT;
5161 sigaction(SIGCHLD, &act, NULL);
5163 signal(SIGCHLD, SIG_IGN);
5167 /* Save the current store pool point, for resetting at the start of
5168 each message, and save the real sender address, if any. */
5170 reset_point = store_get(0);
5171 real_sender_address = sender_address;
5173 /* Loop to receive messages; receive_msg() returns TRUE if there are more
5174 messages to be read (SMTP input), or FALSE otherwise (not SMTP, or SMTP channel
5179 store_reset(reset_point);
5182 /* Handle the SMTP case; call smtp_setup_mst() to deal with the initial SMTP
5183 input and build the recipients list, before calling receive_msg() to read the
5184 message proper. Whatever sender address is given in the SMTP transaction is
5185 often ignored for local senders - we use the actual sender, which is normally
5186 either the underlying user running this process or a -f argument provided by
5187 a trusted caller. It is saved in real_sender_address. The test for whether to
5188 accept the SMTP sender is encapsulated in receive_check_set_sender(). */
5193 if ((rc = smtp_setup_msg()) > 0)
5195 if (real_sender_address != NULL &&
5196 !receive_check_set_sender(sender_address))
5198 sender_address = raw_sender = real_sender_address;
5199 sender_address_unrewritten = NULL;
5202 /* For batched SMTP, we have to run the acl_not_smtp_start ACL, since it
5203 isn't really SMTP, so no other ACL will run until the acl_not_smtp one at
5204 the very end. The result of the ACL is ignored (as for other non-SMTP
5205 messages). It is run for its potential side effects. */
5207 if (smtp_batched_input && acl_not_smtp_start != NULL)
5209 uschar *user_msg, *log_msg;
5210 enable_dollar_recipients = TRUE;
5211 (void)acl_check(ACL_WHERE_NOTSMTP_START, NULL, acl_not_smtp_start,
5212 &user_msg, &log_msg);
5213 enable_dollar_recipients = FALSE;
5216 /* Now get the data for the message */
5218 more = receive_msg(extract_recipients);
5219 if (message_id[0] == 0)
5222 smtp_log_no_mail(); /* Log no mail if configured */
5223 exim_exit(EXIT_FAILURE);
5228 smtp_log_no_mail(); /* Log no mail if configured */
5229 exim_exit((rc == 0)? EXIT_SUCCESS : EXIT_FAILURE);
5233 /* In the non-SMTP case, we have all the information from the command
5234 line, but must process it in case it is in the more general RFC822
5235 format, and in any case, to detect syntax errors. Also, it appears that
5236 the use of comma-separated lists as single arguments is common, so we
5237 had better support them. */
5243 int count = argc - recipients_arg;
5244 uschar **list = argv + recipients_arg;
5246 /* These options cannot be changed dynamically for non-SMTP messages */
5248 active_local_sender_retain = local_sender_retain;
5249 active_local_from_check = local_from_check;
5251 /* Save before any rewriting */
5253 raw_sender = string_copy(sender_address);
5255 /* Loop for each argument */
5257 for (i = 0; i < count; i++)
5259 int start, end, domain;
5261 uschar *s = list[i];
5263 /* Loop for each comma-separated address */
5267 BOOL finished = FALSE;
5269 uschar *ss = parse_find_address_end(s, FALSE);
5271 if (*ss == ',') *ss = 0; else finished = TRUE;
5273 /* Check max recipients - if -t was used, these aren't recipients */
5275 if (recipients_max > 0 && ++rcount > recipients_max &&
5276 !extract_recipients)
5278 if (error_handling == ERRORS_STDERR)
5280 fprintf(stderr, "exim: too many recipients\n");
5281 exim_exit(EXIT_FAILURE);
5286 moan_to_sender(ERRMESS_TOOMANYRECIP, NULL, NULL, stdin, TRUE)?
5287 errors_sender_rc : EXIT_FAILURE;
5292 parse_extract_address(s, &errmess, &start, &end, &domain, FALSE);
5294 if (domain == 0 && !allow_unqualified_recipient)
5297 errmess = US"unqualified recipient address not allowed";
5300 if (recipient == NULL)
5302 if (error_handling == ERRORS_STDERR)
5304 fprintf(stderr, "exim: bad recipient address \"%s\": %s\n",
5305 string_printing(list[i]), errmess);
5306 exim_exit(EXIT_FAILURE);
5312 eblock.text1 = string_printing(list[i]);
5313 eblock.text2 = errmess;
5315 moan_to_sender(ERRMESS_BADARGADDRESS, &eblock, NULL, stdin, TRUE)?
5316 errors_sender_rc : EXIT_FAILURE;
5320 receive_add_recipient(recipient, -1);
5323 while (*(++s) != 0 && (*s == ',' || isspace(*s)));
5327 /* Show the recipients when debugging */
5332 if (sender_address != NULL) debug_printf("Sender: %s\n", sender_address);
5333 if (recipients_list != NULL)
5335 debug_printf("Recipients:\n");
5336 for (i = 0; i < recipients_count; i++)
5337 debug_printf(" %s\n", recipients_list[i].address);
5341 /* Run the acl_not_smtp_start ACL if required. The result of the ACL is
5342 ignored; rejecting here would just add complication, and it can just as
5343 well be done later. Allow $recipients to be visible in the ACL. */
5345 if (acl_not_smtp_start != NULL)
5347 uschar *user_msg, *log_msg;
5348 enable_dollar_recipients = TRUE;
5349 (void)acl_check(ACL_WHERE_NOTSMTP_START, NULL, acl_not_smtp_start,
5350 &user_msg, &log_msg);
5351 enable_dollar_recipients = FALSE;
5354 /* Read the data for the message. If filter_test is not FTEST_NONE, this
5355 will just read the headers for the message, and not write anything onto the
5358 message_ended = END_NOTENDED;
5359 more = receive_msg(extract_recipients);
5361 /* more is always FALSE here (not SMTP message) when reading a message
5362 for real; when reading the headers of a message for filter testing,
5363 it is TRUE if the headers were terminated by '.' and FALSE otherwise. */
5365 if (message_id[0] == 0) exim_exit(EXIT_FAILURE);
5366 } /* Non-SMTP message reception */
5368 /* If this is a filter testing run, there are headers in store, but
5369 no message on the spool. Run the filtering code in testing mode, setting
5370 the domain to the qualify domain and the local part to the current user,
5371 unless they have been set by options. The prefix and suffix are left unset
5372 unless specified. The the return path is set to to the sender unless it has
5373 already been set from a return-path header in the message. */
5375 if (filter_test != FTEST_NONE)
5377 deliver_domain = (ftest_domain != NULL)?
5378 ftest_domain : qualify_domain_recipient;
5379 deliver_domain_orig = deliver_domain;
5380 deliver_localpart = (ftest_localpart != NULL)?
5381 ftest_localpart : originator_login;
5382 deliver_localpart_orig = deliver_localpart;
5383 deliver_localpart_prefix = ftest_prefix;
5384 deliver_localpart_suffix = ftest_suffix;
5385 deliver_home = originator_home;
5387 if (return_path == NULL)
5389 printf("Return-path copied from sender\n");
5390 return_path = string_copy(sender_address);
5394 printf("Return-path = %s\n", (return_path[0] == 0)? US"<>" : return_path);
5396 printf("Sender = %s\n", (sender_address[0] == 0)? US"<>" : sender_address);
5398 receive_add_recipient(
5399 string_sprintf("%s%s%s@%s",
5400 (ftest_prefix == NULL)? US"" : ftest_prefix,
5402 (ftest_suffix == NULL)? US"" : ftest_suffix,
5403 deliver_domain), -1);
5405 printf("Recipient = %s\n", recipients_list[0].address);
5406 if (ftest_prefix != NULL) printf("Prefix = %s\n", ftest_prefix);
5407 if (ftest_suffix != NULL) printf("Suffix = %s\n", ftest_suffix);
5409 if (chdir("/")) /* Get away from wherever the user is running this from */
5411 DEBUG(D_receive) debug_printf("chdir(\"/\") failed\n");
5412 exim_exit(EXIT_FAILURE);
5415 /* Now we run either a system filter test, or a user filter test, or both.
5416 In the latter case, headers added by the system filter will persist and be
5417 available to the user filter. We need to copy the filter variables
5420 if ((filter_test & FTEST_SYSTEM) != 0)
5422 if (!filter_runtest(filter_sfd, filter_test_sfile, TRUE, more))
5423 exim_exit(EXIT_FAILURE);
5426 memcpy(filter_sn, filter_n, sizeof(filter_sn));
5428 if ((filter_test & FTEST_USER) != 0)
5430 if (!filter_runtest(filter_ufd, filter_test_ufile, FALSE, more))
5431 exim_exit(EXIT_FAILURE);
5434 exim_exit(EXIT_SUCCESS);
5437 /* Else act on the result of message reception. We should not get here unless
5438 message_id[0] is non-zero. If queue_only is set, session_local_queue_only
5439 will be TRUE. If it is not, check on the number of messages received in this
5442 if (!session_local_queue_only &&
5443 smtp_accept_queue_per_connection > 0 &&
5444 receive_messagecount > smtp_accept_queue_per_connection)
5446 session_local_queue_only = TRUE;
5447 queue_only_reason = 2;
5450 /* Initialize local_queue_only from session_local_queue_only. If it is false,
5451 and queue_only_load is set, check that the load average is below it. If it is
5452 not, set local_queue_only TRUE. If queue_only_load_latch is true (the
5453 default), we put the whole session into queue_only mode. It then remains this
5454 way for any subsequent messages on the same SMTP connection. This is a
5455 deliberate choice; even though the load average may fall, it doesn't seem
5456 right to deliver later messages on the same call when not delivering earlier
5457 ones. However, there are odd cases where this is not wanted, so this can be
5458 changed by setting queue_only_load_latch false. */
5460 local_queue_only = session_local_queue_only;
5461 if (!local_queue_only && queue_only_load >= 0)
5463 local_queue_only = (load_average = OS_GETLOADAVG()) > queue_only_load;
5464 if (local_queue_only)
5466 queue_only_reason = 3;
5467 if (queue_only_load_latch) session_local_queue_only = TRUE;
5471 /* If running as an MUA wrapper, all queueing options and freezing options
5475 local_queue_only = queue_only_policy = deliver_freeze = FALSE;
5477 /* Log the queueing here, when it will get a message id attached, but
5478 not if queue_only is set (case 0). Case 1 doesn't happen here (too many
5481 if (local_queue_only) switch(queue_only_reason)
5484 log_write(L_delay_delivery,
5485 LOG_MAIN, "no immediate delivery: more than %d messages "
5486 "received in one connection", smtp_accept_queue_per_connection);
5490 log_write(L_delay_delivery,
5491 LOG_MAIN, "no immediate delivery: load average %.2f",
5492 (double)load_average/1000.0);
5496 /* Else do the delivery unless the ACL or local_scan() called for queue only
5497 or froze the message. Always deliver in a separate process. A fork failure is
5498 not a disaster, as the delivery will eventually happen on a subsequent queue
5499 run. The search cache must be tidied before the fork, as the parent will
5500 do it before exiting. The child will trigger a lookup failure and
5501 thereby defer the delivery if it tries to use (for example) a cached ldap
5502 connection that the parent has called unbind on. */
5504 else if (!queue_only_policy && !deliver_freeze)
5509 if ((pid = fork()) == 0)
5512 close_unwanted(); /* Close unwanted file descriptors and TLS */
5513 exim_nullstd(); /* Ensure std{in,out,err} exist */
5515 /* Re-exec Exim if we need to regain privilege (note: in mua_wrapper
5516 mode, deliver_drop_privilege is forced TRUE). */
5518 if (geteuid() != root_uid && !deliver_drop_privilege && !unprivileged)
5520 (void)child_exec_exim(CEE_EXEC_EXIT, FALSE, NULL, FALSE, 2, US"-Mc",
5522 /* Control does not return here. */
5525 /* No need to re-exec */
5527 rc = deliver_message(message_id, FALSE, FALSE);
5529 _exit((!mua_wrapper || rc == DELIVER_MUA_SUCCEEDED)?
5530 EXIT_SUCCESS : EXIT_FAILURE);
5535 log_write(0, LOG_MAIN|LOG_PANIC, "failed to fork automatic delivery "
5536 "process: %s", strerror(errno));
5539 /* In the parent, wait if synchronous delivery is required. This will
5540 always be the case in MUA wrapper mode. */
5542 else if (synchronous_delivery)
5545 while (wait(&status) != pid);
5546 if ((status & 0x00ff) != 0)
5547 log_write(0, LOG_MAIN|LOG_PANIC,
5548 "process %d crashed with signal %d while delivering %s",
5549 (int)pid, status & 0x00ff, message_id);
5550 if (mua_wrapper && (status & 0xffff) != 0) exim_exit(EXIT_FAILURE);
5554 /* The loop will repeat if more is TRUE. If we do not know know that the OS
5555 automatically reaps children (see comments above the loop), clear away any
5556 finished subprocesses here, in case there are lots of messages coming in
5557 from the same source. */
5559 #ifndef SIG_IGN_WORKS
5560 while (waitpid(-1, NULL, WNOHANG) > 0);
5564 exim_exit(EXIT_SUCCESS); /* Never returns */
5565 return 0; /* To stop compiler warning */