1 /*************************************************
2 * Exim - an Internet mail transport agent *
3 *************************************************/
5 /* Copyright (c) University of Cambridge 1995 - 2014 */
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(TRUE, 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_DMARC
820 fprintf(f, " Experimental_DMARC");
822 #ifdef EXPERIMENTAL_OCSP
823 fprintf(f, " Experimental_OCSP");
825 #ifdef EXPERIMENTAL_PRDR
826 fprintf(f, " Experimental_PRDR");
828 #ifdef EXPERIMENTAL_PROXY
829 fprintf(f, " Experimental_Proxy");
831 #ifdef EXPERIMENTAL_TPDA
832 fprintf(f, " Experimental_TPDA");
834 #ifdef EXPERIMENTAL_REDIS
835 fprintf(f, " Experimental_Redis");
839 fprintf(f, "Lookups (built-in):");
840 #if defined(LOOKUP_LSEARCH) && LOOKUP_LSEARCH!=2
841 fprintf(f, " lsearch wildlsearch nwildlsearch iplsearch");
843 #if defined(LOOKUP_CDB) && LOOKUP_CDB!=2
846 #if defined(LOOKUP_DBM) && LOOKUP_DBM!=2
847 fprintf(f, " dbm dbmjz dbmnz");
849 #if defined(LOOKUP_DNSDB) && LOOKUP_DNSDB!=2
850 fprintf(f, " dnsdb");
852 #if defined(LOOKUP_DSEARCH) && LOOKUP_DSEARCH!=2
853 fprintf(f, " dsearch");
855 #if defined(LOOKUP_IBASE) && LOOKUP_IBASE!=2
856 fprintf(f, " ibase");
858 #if defined(LOOKUP_LDAP) && LOOKUP_LDAP!=2
859 fprintf(f, " ldap ldapdn ldapm");
861 #if defined(LOOKUP_MYSQL) && LOOKUP_MYSQL!=2
862 fprintf(f, " mysql");
864 #if defined(LOOKUP_NIS) && LOOKUP_NIS!=2
865 fprintf(f, " nis nis0");
867 #if defined(LOOKUP_NISPLUS) && LOOKUP_NISPLUS!=2
868 fprintf(f, " nisplus");
870 #if defined(LOOKUP_ORACLE) && LOOKUP_ORACLE!=2
871 fprintf(f, " oracle");
873 #if defined(LOOKUP_PASSWD) && LOOKUP_PASSWD!=2
874 fprintf(f, " passwd");
876 #if defined(LOOKUP_PGSQL) && LOOKUP_PGSQL!=2
877 fprintf(f, " pgsql");
879 #if defined(LOOKUP_SQLITE) && LOOKUP_SQLITE!=2
880 fprintf(f, " sqlite");
882 #if defined(LOOKUP_TESTDB) && LOOKUP_TESTDB!=2
883 fprintf(f, " testdb");
885 #if defined(LOOKUP_WHOSON) && LOOKUP_WHOSON!=2
886 fprintf(f, " whoson");
890 fprintf(f, "Authenticators:");
892 fprintf(f, " cram_md5");
894 #ifdef AUTH_CYRUS_SASL
895 fprintf(f, " cyrus_sasl");
898 fprintf(f, " dovecot");
901 fprintf(f, " gsasl");
903 #ifdef AUTH_HEIMDAL_GSSAPI
904 fprintf(f, " heimdal_gssapi");
906 #ifdef AUTH_PLAINTEXT
907 fprintf(f, " plaintext");
914 fprintf(f, "Routers:");
916 fprintf(f, " accept");
918 #ifdef ROUTER_DNSLOOKUP
919 fprintf(f, " dnslookup");
921 #ifdef ROUTER_IPLITERAL
922 fprintf(f, " ipliteral");
924 #ifdef ROUTER_IPLOOKUP
925 fprintf(f, " iplookup");
927 #ifdef ROUTER_MANUALROUTE
928 fprintf(f, " manualroute");
930 #ifdef ROUTER_QUERYPROGRAM
931 fprintf(f, " queryprogram");
933 #ifdef ROUTER_REDIRECT
934 fprintf(f, " redirect");
938 fprintf(f, "Transports:");
939 #ifdef TRANSPORT_APPENDFILE
940 fprintf(f, " appendfile");
941 #ifdef SUPPORT_MAILDIR
942 fprintf(f, "/maildir");
944 #ifdef SUPPORT_MAILSTORE
945 fprintf(f, "/mailstore");
951 #ifdef TRANSPORT_AUTOREPLY
952 fprintf(f, " autoreply");
954 #ifdef TRANSPORT_LMTP
957 #ifdef TRANSPORT_PIPE
960 #ifdef TRANSPORT_SMTP
965 if (fixed_never_users[0] > 0)
968 fprintf(f, "Fixed never_users: ");
969 for (i = 1; i <= (int)fixed_never_users[0] - 1; i++)
970 fprintf(f, "%d:", (unsigned int)fixed_never_users[i]);
971 fprintf(f, "%d\n", (unsigned int)fixed_never_users[i]);
974 fprintf(f, "Size of off_t: " SIZE_T_FMT "\n", sizeof(off_t));
976 /* Everything else is details which are only worth reporting when debugging.
977 Perhaps the tls_version_report should move into this too. */
982 /* clang defines __GNUC__ (at least, for me) so test for it first */
983 #if defined(__clang__)
984 fprintf(f, "Compiler: CLang [%s]\n", __clang_version__);
985 #elif defined(__GNUC__)
986 fprintf(f, "Compiler: GCC [%s]\n",
990 "? unknown version ?"
994 fprintf(f, "Compiler: <unknown>\n");
998 tls_version_report(f);
1001 for (authi = auths_available; *authi->driver_name != '\0'; ++authi) {
1002 if (authi->version_report) {
1003 (*authi->version_report)(f);
1007 /* PCRE_PRERELEASE is either defined and empty or a bare sequence of
1008 characters; unless it's an ancient version of PCRE in which case it
1010 #ifndef PCRE_PRERELEASE
1011 #define PCRE_PRERELEASE
1014 #define EXPAND_AND_QUOTE(X) QUOTE(X)
1015 fprintf(f, "Library version: PCRE: Compile: %d.%d%s\n"
1017 PCRE_MAJOR, PCRE_MINOR,
1018 EXPAND_AND_QUOTE(PCRE_PRERELEASE) "",
1021 #undef EXPAND_AND_QUOTE
1024 for (i = 0; i < lookup_list_count; i++)
1026 if (lookup_list[i]->version_report)
1027 lookup_list[i]->version_report(f);
1030 #ifdef WHITELIST_D_MACROS
1031 fprintf(f, "WHITELIST_D_MACROS: \"%s\"\n", WHITELIST_D_MACROS);
1033 fprintf(f, "WHITELIST_D_MACROS unset\n");
1035 #ifdef TRUSTED_CONFIG_LIST
1036 fprintf(f, "TRUSTED_CONFIG_LIST: \"%s\"\n", TRUSTED_CONFIG_LIST);
1038 fprintf(f, "TRUSTED_CONFIG_LIST unset\n");
1045 /*************************************************
1046 * Show auxiliary information about Exim *
1047 *************************************************/
1050 show_exim_information(enum commandline_info request, FILE *stream)
1057 fprintf(stream, "Oops, something went wrong.\n");
1061 "The -bI: flag takes a string indicating which information to provide.\n"
1062 "If the string is not recognised, you'll get this help (on stderr).\n"
1064 " exim -bI:help this information\n"
1065 " exim -bI:dscp dscp value keywords known\n"
1066 " exim -bI:sieve list of supported sieve extensions, one per line.\n"
1070 for (pp = exim_sieve_extension_list; *pp; ++pp)
1071 fprintf(stream, "%s\n", *pp);
1074 dscp_list_to_stream(stream);
1080 /*************************************************
1081 * Quote a local part *
1082 *************************************************/
1084 /* This function is used when a sender address or a From: or Sender: header
1085 line is being created from the caller's login, or from an authenticated_id. It
1086 applies appropriate quoting rules for a local part.
1088 Argument: the local part
1089 Returns: the local part, quoted if necessary
1093 local_part_quote(uschar *lpart)
1095 BOOL needs_quote = FALSE;
1100 for (t = lpart; !needs_quote && *t != 0; t++)
1102 needs_quote = !isalnum(*t) && strchr("!#$%&'*+-/=?^_`{|}~", *t) == NULL &&
1103 (*t != '.' || t == lpart || t[1] == 0);
1106 if (!needs_quote) return lpart;
1109 yield = string_cat(NULL, &size, &ptr, US"\"", 1);
1113 uschar *nq = US Ustrpbrk(lpart, "\\\"");
1116 yield = string_cat(yield, &size, &ptr, lpart, Ustrlen(lpart));
1119 yield = string_cat(yield, &size, &ptr, lpart, nq - lpart);
1120 yield = string_cat(yield, &size, &ptr, US"\\", 1);
1121 yield = string_cat(yield, &size, &ptr, nq, 1);
1125 yield = string_cat(yield, &size, &ptr, US"\"", 1);
1133 /*************************************************
1134 * Load readline() functions *
1135 *************************************************/
1137 /* This function is called from testing executions that read data from stdin,
1138 but only when running as the calling user. Currently, only -be does this. The
1139 function loads the readline() function library and passes back the functions.
1140 On some systems, it needs the curses library, so load that too, but try without
1141 it if loading fails. All this functionality has to be requested at build time.
1144 fn_readline_ptr pointer to where to put the readline pointer
1145 fn_addhist_ptr pointer to where to put the addhistory function
1147 Returns: the dlopen handle or NULL on failure
1151 set_readline(char * (**fn_readline_ptr)(const char *),
1152 void (**fn_addhist_ptr)(const char *))
1155 void *dlhandle_curses = dlopen("libcurses." DYNLIB_FN_EXT, RTLD_GLOBAL|RTLD_LAZY);
1157 dlhandle = dlopen("libreadline." DYNLIB_FN_EXT, RTLD_GLOBAL|RTLD_NOW);
1158 if (dlhandle_curses != NULL) dlclose(dlhandle_curses);
1160 if (dlhandle != NULL)
1162 /* Checked manual pages; at least in GNU Readline 6.1, the prototypes are:
1163 * char * readline (const char *prompt);
1164 * void add_history (const char *string);
1166 *fn_readline_ptr = (char *(*)(const char*))dlsym(dlhandle, "readline");
1167 *fn_addhist_ptr = (void(*)(const char*))dlsym(dlhandle, "add_history");
1171 DEBUG(D_any) debug_printf("failed to load readline: %s\n", dlerror());
1180 /*************************************************
1181 * Get a line from stdin for testing things *
1182 *************************************************/
1184 /* This function is called when running tests that can take a number of lines
1185 of input (for example, -be and -bt). It handles continuations and trailing
1186 spaces. And prompting and a blank line output on eof. If readline() is in use,
1187 the arguments are non-NULL and provide the relevant functions.
1190 fn_readline readline function or NULL
1191 fn_addhist addhist function or NULL
1193 Returns: pointer to dynamic memory, or NULL at end of file
1197 get_stdinput(char *(*fn_readline)(const char *), void(*fn_addhist)(const char *))
1202 uschar *yield = NULL;
1204 if (fn_readline == NULL) { printf("> "); fflush(stdout); }
1208 uschar buffer[1024];
1212 char *readline_line = NULL;
1213 if (fn_readline != NULL)
1215 if ((readline_line = fn_readline((i > 0)? "":"> ")) == NULL) break;
1216 if (*readline_line != 0 && fn_addhist != NULL) fn_addhist(readline_line);
1217 p = US readline_line;
1222 /* readline() not in use */
1225 if (Ufgets(buffer, sizeof(buffer), stdin) == NULL) break;
1229 /* Handle the line */
1231 ss = p + (int)Ustrlen(p);
1232 while (ss > p && isspace(ss[-1])) ss--;
1236 while (p < ss && isspace(*p)) p++; /* leading space after cont */
1239 yield = string_cat(yield, &size, &ptr, p, ss - p);
1242 if (fn_readline != NULL) free(readline_line);
1245 if (ss == p || yield[ptr-1] != '\\')
1253 if (yield == NULL) printf("\n");
1259 /*************************************************
1260 * Output usage information for the program *
1261 *************************************************/
1263 /* This function is called when there are no recipients
1264 or a specific --help argument was added.
1267 progname information on what name we were called by
1269 Returns: DOES NOT RETURN
1273 exim_usage(uschar *progname)
1276 /* Handle specific program invocation varients */
1277 if (Ustrcmp(progname, US"-mailq") == 0)
1280 "mailq - list the contents of the mail queue\n\n"
1281 "For a list of options, see the Exim documentation.\n");
1285 /* Generic usage - we output this whatever happens */
1287 "Exim is a Mail Transfer Agent. It is normally called by Mail User Agents,\n"
1288 "not directly from a shell command line. Options and/or arguments control\n"
1289 "what it does when called. For a list of options, see the Exim documentation.\n");
1296 /*************************************************
1297 * Validate that the macros given are okay *
1298 *************************************************/
1300 /* Typically, Exim will drop privileges if macros are supplied. In some
1301 cases, we want to not do so.
1303 Arguments: none (macros is a global)
1304 Returns: true if trusted, false otherwise
1308 macros_trusted(void)
1310 #ifdef WHITELIST_D_MACROS
1312 uschar *whitelisted, *end, *p, **whites, **w;
1313 int white_count, i, n;
1315 BOOL prev_char_item, found;
1320 #ifndef WHITELIST_D_MACROS
1324 /* We only trust -D overrides for some invoking users:
1325 root, the exim run-time user, the optional config owner user.
1326 I don't know why config-owner would be needed, but since they can own the
1327 config files anyway, there's no security risk to letting them override -D. */
1328 if ( ! ((real_uid == root_uid)
1329 || (real_uid == exim_uid)
1330 #ifdef CONFIGURE_OWNER
1331 || (real_uid == config_uid)
1335 debug_printf("macros_trusted rejecting macros for uid %d\n", (int) real_uid);
1339 /* Get a list of macros which are whitelisted */
1340 whitelisted = string_copy_malloc(US WHITELIST_D_MACROS);
1341 prev_char_item = FALSE;
1343 for (p = whitelisted; *p != '\0'; ++p)
1345 if (*p == ':' || isspace(*p))
1350 prev_char_item = FALSE;
1353 if (!prev_char_item)
1354 prev_char_item = TRUE;
1361 whites = store_malloc(sizeof(uschar *) * (white_count+1));
1362 for (p = whitelisted, i = 0; (p != end) && (i < white_count); ++p)
1367 if (i == white_count)
1369 while (*p != '\0' && p < end)
1375 /* The list of macros should be very short. Accept the N*M complexity. */
1376 for (m = macros; m != NULL; m = m->next)
1379 for (w = whites; *w; ++w)
1380 if (Ustrcmp(*w, m->name) == 0)
1387 if (m->replacement == NULL)
1389 len = Ustrlen(m->replacement);
1392 n = pcre_exec(regex_whitelisted_macro, NULL, CS m->replacement, len,
1393 0, PCRE_EOPT, NULL, 0);
1396 if (n != PCRE_ERROR_NOMATCH)
1397 debug_printf("macros_trusted checking %s returned %d\n", m->name, n);
1401 DEBUG(D_any) debug_printf("macros_trusted overridden to true by whitelisting\n");
1407 /*************************************************
1408 * Entry point and high-level code *
1409 *************************************************/
1411 /* Entry point for the Exim mailer. Analyse the arguments and arrange to take
1412 the appropriate action. All the necessary functions are present in the one
1413 binary. I originally thought one should split it up, but it turns out that so
1414 much of the apparatus is needed in each chunk that one might as well just have
1415 it all available all the time, which then makes the coding easier as well.
1418 argc count of entries in argv
1419 argv argument strings, with argv[0] being the program name
1421 Returns: EXIT_SUCCESS if terminated successfully
1422 EXIT_FAILURE otherwise, except when a message has been sent
1423 to the sender, and -oee was given
1427 main(int argc, char **cargv)
1429 uschar **argv = USS cargv;
1430 int arg_receive_timeout = -1;
1431 int arg_smtp_receive_timeout = -1;
1432 int arg_error_handling = error_handling;
1433 int filter_sfd = -1;
1434 int filter_ufd = -1;
1437 int list_queue_option = 0;
1439 int msg_action_arg = -1;
1440 int namelen = (argv[0] == NULL)? 0 : Ustrlen(argv[0]);
1441 int queue_only_reason = 0;
1443 int perl_start_option = 0;
1445 int recipients_arg = argc;
1446 int sender_address_domain = 0;
1447 int test_retry_arg = -1;
1448 int test_rewrite_arg = -1;
1449 BOOL arg_queue_only = FALSE;
1450 BOOL bi_option = FALSE;
1451 BOOL checking = FALSE;
1452 BOOL count_queue = FALSE;
1453 BOOL expansion_test = FALSE;
1454 BOOL extract_recipients = FALSE;
1455 BOOL flag_G = FALSE;
1456 BOOL flag_n = FALSE;
1457 BOOL forced_delivery = FALSE;
1458 BOOL f_end_dot = FALSE;
1459 BOOL deliver_give_up = FALSE;
1460 BOOL list_queue = FALSE;
1461 BOOL list_options = FALSE;
1462 BOOL local_queue_only;
1464 BOOL one_msg_action = FALSE;
1465 BOOL queue_only_set = FALSE;
1466 BOOL receiving_message = TRUE;
1467 BOOL sender_ident_set = FALSE;
1468 BOOL session_local_queue_only;
1470 BOOL removed_privilege = FALSE;
1471 BOOL usage_wanted = FALSE;
1472 BOOL verify_address_mode = FALSE;
1473 BOOL verify_as_sender = FALSE;
1474 BOOL version_printed = FALSE;
1475 uschar *alias_arg = NULL;
1476 uschar *called_as = US"";
1477 uschar *cmdline_syslog_name = NULL;
1478 uschar *start_queue_run_id = NULL;
1479 uschar *stop_queue_run_id = NULL;
1480 uschar *expansion_test_message = NULL;
1481 uschar *ftest_domain = NULL;
1482 uschar *ftest_localpart = NULL;
1483 uschar *ftest_prefix = NULL;
1484 uschar *ftest_suffix = NULL;
1485 uschar *malware_test_file = NULL;
1486 uschar *real_sender_address;
1487 uschar *originator_home = US"/";
1492 struct stat statbuf;
1493 pid_t passed_qr_pid = (pid_t)0;
1494 int passed_qr_pipe = -1;
1495 gid_t group_list[NGROUPS_MAX];
1497 /* For the -bI: flag */
1498 enum commandline_info info_flag = CMDINFO_NONE;
1499 BOOL info_stdout = FALSE;
1501 /* Possible options for -R and -S */
1503 static uschar *rsopts[] = { US"f", US"ff", US"r", US"rf", US"rff" };
1505 /* Need to define this in case we need to change the environment in order
1506 to get rid of a bogus time zone. We have to make it char rather than uschar
1507 because some OS define it in /usr/include/unistd.h. */
1509 extern char **environ;
1511 /* If the Exim user and/or group and/or the configuration file owner/group were
1512 defined by ref:name at build time, we must now find the actual uid/gid values.
1513 This is a feature to make the lives of binary distributors easier. */
1515 #ifdef EXIM_USERNAME
1516 if (route_finduser(US EXIM_USERNAME, &pw, &exim_uid))
1520 fprintf(stderr, "exim: refusing to run with uid 0 for \"%s\"\n",
1524 /* If ref:name uses a number as the name, route_finduser() returns
1525 TRUE with exim_uid set and pw coerced to NULL. */
1527 exim_gid = pw->pw_gid;
1528 #ifndef EXIM_GROUPNAME
1532 "exim: ref:name should specify a usercode, not a group.\n"
1533 "exim: can't let you get away with it unless you also specify a group.\n");
1540 fprintf(stderr, "exim: failed to find uid for user name \"%s\"\n",
1546 #ifdef EXIM_GROUPNAME
1547 if (!route_findgroup(US EXIM_GROUPNAME, &exim_gid))
1549 fprintf(stderr, "exim: failed to find gid for group name \"%s\"\n",
1555 #ifdef CONFIGURE_OWNERNAME
1556 if (!route_finduser(US CONFIGURE_OWNERNAME, NULL, &config_uid))
1558 fprintf(stderr, "exim: failed to find uid for user name \"%s\"\n",
1559 CONFIGURE_OWNERNAME);
1564 /* We default the system_filter_user to be the Exim run-time user, as a
1565 sane non-root value. */
1566 system_filter_uid = exim_uid;
1568 #ifdef CONFIGURE_GROUPNAME
1569 if (!route_findgroup(US CONFIGURE_GROUPNAME, &config_gid))
1571 fprintf(stderr, "exim: failed to find gid for group name \"%s\"\n",
1572 CONFIGURE_GROUPNAME);
1577 /* In the Cygwin environment, some initialization needs doing. It is fudged
1578 in by means of this macro. */
1584 /* Check a field which is patched when we are running Exim within its
1585 testing harness; do a fast initial check, and then the whole thing. */
1587 running_in_test_harness =
1588 *running_status == '<' && Ustrcmp(running_status, "<<<testing>>>") == 0;
1590 /* The C standard says that the equivalent of setlocale(LC_ALL, "C") is obeyed
1591 at the start of a program; however, it seems that some environments do not
1592 follow this. A "strange" locale can affect the formatting of timestamps, so we
1595 setlocale(LC_ALL, "C");
1597 /* Set up the default handler for timing using alarm(). */
1599 os_non_restarting_signal(SIGALRM, sigalrm_handler);
1601 /* Ensure we have a buffer for constructing log entries. Use malloc directly,
1602 because store_malloc writes a log entry on failure. */
1604 log_buffer = (uschar *)malloc(LOG_BUFFER_SIZE);
1605 if (log_buffer == NULL)
1607 fprintf(stderr, "exim: failed to get store for log buffer\n");
1611 /* Set log_stderr to stderr, provided that stderr exists. This gets reset to
1612 NULL when the daemon is run and the file is closed. We have to use this
1613 indirection, because some systems don't allow writing to the variable "stderr".
1616 if (fstat(fileno(stderr), &statbuf) >= 0) log_stderr = stderr;
1618 /* Arrange for the PCRE regex library to use our store functions. Note that
1619 the normal calls are actually macros that add additional arguments for
1620 debugging purposes so we have to assign specially constructed functions here.
1621 The default is to use store in the stacking pool, but this is overridden in the
1622 regex_must_compile() function. */
1624 pcre_malloc = function_store_get;
1625 pcre_free = function_dummy_free;
1627 /* Ensure there is a big buffer for temporary use in several places. It is put
1628 in malloc store so that it can be freed for enlargement if necessary. */
1630 big_buffer = store_malloc(big_buffer_size);
1632 /* Set up the handler for the data request signal, and set the initial
1633 descriptive text. */
1635 set_process_info("initializing");
1636 os_restarting_signal(SIGUSR1, usr1_handler);
1638 /* SIGHUP is used to get the daemon to reconfigure. It gets set as appropriate
1639 in the daemon code. For the rest of Exim's uses, we ignore it. */
1641 signal(SIGHUP, SIG_IGN);
1643 /* We don't want to die on pipe errors as the code is written to handle
1644 the write error instead. */
1646 signal(SIGPIPE, SIG_IGN);
1648 /* Under some circumstance on some OS, Exim can get called with SIGCHLD
1649 set to SIG_IGN. This causes subprocesses that complete before the parent
1650 process waits for them not to hang around, so when Exim calls wait(), nothing
1651 is there. The wait() code has been made robust against this, but let's ensure
1652 that SIGCHLD is set to SIG_DFL, because it's tidier to wait and get a process
1653 ending status. We use sigaction rather than plain signal() on those OS where
1654 SA_NOCLDWAIT exists, because we want to be sure it is turned off. (There was a
1655 problem on AIX with this.) */
1659 struct sigaction act;
1660 act.sa_handler = SIG_DFL;
1661 sigemptyset(&(act.sa_mask));
1663 sigaction(SIGCHLD, &act, NULL);
1666 signal(SIGCHLD, SIG_DFL);
1669 /* Save the arguments for use if we re-exec exim as a daemon after receiving
1674 /* Set up the version number. Set up the leading 'E' for the external form of
1675 message ids, set the pointer to the internal form, and initialize it to
1676 indicate no message being processed. */
1679 message_id_option[0] = '-';
1680 message_id_external = message_id_option + 1;
1681 message_id_external[0] = 'E';
1682 message_id = message_id_external + 1;
1685 /* Set the umask to zero so that any files Exim creates using open() are
1686 created with the modes that it specifies. NOTE: Files created with fopen() have
1687 a problem, which was not recognized till rather late (February 2006). With this
1688 umask, such files will be world writeable. (They are all content scanning files
1689 in the spool directory, which isn't world-accessible, so this is not a
1690 disaster, but it's untidy.) I don't want to change this overall setting,
1691 however, because it will interact badly with the open() calls. Instead, there's
1692 now a function called modefopen() that fiddles with the umask while calling
1697 /* Precompile the regular expression for matching a message id. Keep this in
1698 step with the code that generates ids in the accept.c module. We need to do
1699 this here, because the -M options check their arguments for syntactic validity
1700 using mac_ismsgid, which uses this. */
1703 regex_must_compile(US"^(?:[^\\W_]{6}-){2}[^\\W_]{2}$", FALSE, TRUE);
1705 /* Precompile the regular expression that is used for matching an SMTP error
1706 code, possibly extended, at the start of an error message. Note that the
1707 terminating whitespace character is included. */
1710 regex_must_compile(US"^\\d\\d\\d\\s(?:\\d\\.\\d\\d?\\d?\\.\\d\\d?\\d?\\s)?",
1713 #ifdef WHITELIST_D_MACROS
1714 /* Precompile the regular expression used to filter the content of macros
1715 given to -D for permissibility. */
1717 regex_whitelisted_macro =
1718 regex_must_compile(US"^[A-Za-z0-9_/.-]*$", FALSE, TRUE);
1722 /* If the program is called as "mailq" treat it as equivalent to "exim -bp";
1723 this seems to be a generally accepted convention, since one finds symbolic
1724 links called "mailq" in standard OS configurations. */
1726 if ((namelen == 5 && Ustrcmp(argv[0], "mailq") == 0) ||
1727 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/mailq", 6) == 0))
1730 receiving_message = FALSE;
1731 called_as = US"-mailq";
1734 /* If the program is called as "rmail" treat it as equivalent to
1735 "exim -i -oee", thus allowing UUCP messages to be input using non-SMTP mode,
1736 i.e. preventing a single dot on a line from terminating the message, and
1737 returning with zero return code, even in cases of error (provided an error
1738 message has been sent). */
1740 if ((namelen == 5 && Ustrcmp(argv[0], "rmail") == 0) ||
1741 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/rmail", 6) == 0))
1744 called_as = US"-rmail";
1745 errors_sender_rc = EXIT_SUCCESS;
1748 /* If the program is called as "rsmtp" treat it as equivalent to "exim -bS";
1749 this is a smail convention. */
1751 if ((namelen == 5 && Ustrcmp(argv[0], "rsmtp") == 0) ||
1752 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/rsmtp", 6) == 0))
1754 smtp_input = smtp_batched_input = TRUE;
1755 called_as = US"-rsmtp";
1758 /* If the program is called as "runq" treat it as equivalent to "exim -q";
1759 this is a smail convention. */
1761 if ((namelen == 4 && Ustrcmp(argv[0], "runq") == 0) ||
1762 (namelen > 4 && Ustrncmp(argv[0] + namelen - 5, "/runq", 5) == 0))
1765 receiving_message = FALSE;
1766 called_as = US"-runq";
1769 /* If the program is called as "newaliases" treat it as equivalent to
1770 "exim -bi"; this is a sendmail convention. */
1772 if ((namelen == 10 && Ustrcmp(argv[0], "newaliases") == 0) ||
1773 (namelen > 10 && Ustrncmp(argv[0] + namelen - 11, "/newaliases", 11) == 0))
1776 receiving_message = FALSE;
1777 called_as = US"-newaliases";
1780 /* Save the original effective uid for a couple of uses later. It should
1781 normally be root, but in some esoteric environments it may not be. */
1783 original_euid = geteuid();
1785 /* Get the real uid and gid. If the caller is root, force the effective uid/gid
1786 to be the same as the real ones. This makes a difference only if Exim is setuid
1787 (or setgid) to something other than root, which could be the case in some
1788 special configurations. */
1790 real_uid = getuid();
1791 real_gid = getgid();
1793 if (real_uid == root_uid)
1795 rv = setgid(real_gid);
1798 fprintf(stderr, "exim: setgid(%ld) failed: %s\n",
1799 (long int)real_gid, strerror(errno));
1802 rv = setuid(real_uid);
1805 fprintf(stderr, "exim: setuid(%ld) failed: %s\n",
1806 (long int)real_uid, strerror(errno));
1811 /* If neither the original real uid nor the original euid was root, Exim is
1812 running in an unprivileged state. */
1814 unprivileged = (real_uid != root_uid && original_euid != root_uid);
1816 /* Scan the program's arguments. Some can be dealt with right away; others are
1817 simply recorded for checking and handling afterwards. Do a high-level switch
1818 on the second character (the one after '-'), to save some effort. */
1820 for (i = 1; i < argc; i++)
1822 BOOL badarg = FALSE;
1823 uschar *arg = argv[i];
1827 /* An argument not starting with '-' is the start of a recipients list;
1828 break out of the options-scanning loop. */
1836 /* An option consistion of -- terminates the options */
1838 if (Ustrcmp(arg, "--") == 0)
1840 recipients_arg = i + 1;
1844 /* Handle flagged options */
1846 switchchar = arg[1];
1849 /* Make all -ex options synonymous with -oex arguments, since that
1850 is assumed by various callers. Also make -qR options synonymous with -R
1851 options, as that seems to be required as well. Allow for -qqR too, and
1852 the same for -S options. */
1854 if (Ustrncmp(arg+1, "oe", 2) == 0 ||
1855 Ustrncmp(arg+1, "qR", 2) == 0 ||
1856 Ustrncmp(arg+1, "qS", 2) == 0)
1858 switchchar = arg[2];
1861 else if (Ustrncmp(arg+1, "qqR", 3) == 0 || Ustrncmp(arg+1, "qqS", 3) == 0)
1863 switchchar = arg[3];
1865 queue_2stage = TRUE;
1868 /* Make -r synonymous with -f, since it is a documented alias */
1870 else if (arg[1] == 'r') switchchar = 'f';
1872 /* Make -ov synonymous with -v */
1874 else if (Ustrcmp(arg, "-ov") == 0)
1880 /* deal with --option_aliases */
1881 else if (switchchar == '-')
1883 if (Ustrcmp(argrest, "help") == 0)
1885 usage_wanted = TRUE;
1888 else if (Ustrcmp(argrest, "version") == 0)
1895 /* High-level switch on active initial letter */
1900 /* sendmail uses -Ac and -Am to control which .cf file is used;
1903 if (*argrest == '\0') { badarg = TRUE; break; }
1906 BOOL ignore = FALSE;
1911 if (*(argrest + 1) == '\0')
1915 if (!ignore) { badarg = TRUE; break; }
1919 /* -Btype is a sendmail option for 7bit/8bit setting. Exim is 8-bit clean
1920 so has no need of it. */
1923 if (*argrest == 0) i++; /* Skip over the type */
1928 receiving_message = FALSE; /* Reset TRUE for -bm, -bS, -bs below */
1930 /* -bd: Run in daemon mode, awaiting SMTP connections.
1931 -bdf: Ditto, but in the foreground.
1934 if (*argrest == 'd')
1936 daemon_listen = TRUE;
1937 if (*(++argrest) == 'f') background_daemon = FALSE;
1938 else if (*argrest != 0) { badarg = TRUE; break; }
1941 /* -be: Run in expansion test mode
1942 -bem: Ditto, but read a message from a file first
1945 else if (*argrest == 'e')
1947 expansion_test = checking = TRUE;
1948 if (argrest[1] == 'm')
1950 if (++i >= argc) { badarg = TRUE; break; }
1951 expansion_test_message = argv[i];
1954 if (argrest[1] != 0) { badarg = TRUE; break; }
1957 /* -bF: Run system filter test */
1959 else if (*argrest == 'F')
1961 filter_test |= FTEST_SYSTEM;
1962 if (*(++argrest) != 0) { badarg = TRUE; break; }
1963 if (++i < argc) filter_test_sfile = argv[i]; else
1965 fprintf(stderr, "exim: file name expected after %s\n", argv[i-1]);
1970 /* -bf: Run user filter test
1971 -bfd: Set domain for filter testing
1972 -bfl: Set local part for filter testing
1973 -bfp: Set prefix for filter testing
1974 -bfs: Set suffix for filter testing
1977 else if (*argrest == 'f')
1979 if (*(++argrest) == 0)
1981 filter_test |= FTEST_USER;
1982 if (++i < argc) filter_test_ufile = argv[i]; else
1984 fprintf(stderr, "exim: file name expected after %s\n", argv[i-1]);
1992 fprintf(stderr, "exim: string expected after %s\n", arg);
1995 if (Ustrcmp(argrest, "d") == 0) ftest_domain = argv[i];
1996 else if (Ustrcmp(argrest, "l") == 0) ftest_localpart = argv[i];
1997 else if (Ustrcmp(argrest, "p") == 0) ftest_prefix = argv[i];
1998 else if (Ustrcmp(argrest, "s") == 0) ftest_suffix = argv[i];
1999 else { badarg = TRUE; break; }
2003 /* -bh: Host checking - an IP address must follow. */
2005 else if (Ustrcmp(argrest, "h") == 0 || Ustrcmp(argrest, "hc") == 0)
2007 if (++i >= argc) { badarg = TRUE; break; }
2008 sender_host_address = argv[i];
2009 host_checking = checking = log_testing_mode = TRUE;
2010 host_checking_callout = argrest[1] == 'c';
2013 /* -bi: This option is used by sendmail to initialize *the* alias file,
2014 though it has the -oA option to specify a different file. Exim has no
2015 concept of *the* alias file, but since Sun's YP make script calls
2016 sendmail this way, some support must be provided. */
2018 else if (Ustrcmp(argrest, "i") == 0) bi_option = TRUE;
2020 /* -bI: provide information, of the type to follow after a colon.
2021 This is an Exim flag. */
2023 else if (argrest[0] == 'I' && Ustrlen(argrest) >= 2 && argrest[1] == ':')
2025 uschar *p = &argrest[2];
2026 info_flag = CMDINFO_HELP;
2029 if (strcmpic(p, CUS"sieve") == 0)
2031 info_flag = CMDINFO_SIEVE;
2034 else if (strcmpic(p, CUS"dscp") == 0)
2036 info_flag = CMDINFO_DSCP;
2039 else if (strcmpic(p, CUS"help") == 0)
2046 /* -bm: Accept and deliver message - the default option. Reinstate
2047 receiving_message, which got turned off for all -b options. */
2049 else if (Ustrcmp(argrest, "m") == 0) receiving_message = TRUE;
2051 /* -bmalware: test the filename given for malware */
2053 else if (Ustrcmp(argrest, "malware") == 0)
2055 if (++i >= argc) { badarg = TRUE; break; }
2056 malware_test_file = argv[i];
2059 /* -bnq: For locally originating messages, do not qualify unqualified
2060 addresses. In the envelope, this causes errors; in header lines they
2063 else if (Ustrcmp(argrest, "nq") == 0)
2065 allow_unqualified_sender = FALSE;
2066 allow_unqualified_recipient = FALSE;
2069 /* -bpxx: List the contents of the mail queue, in various forms. If
2070 the option is -bpc, just a queue count is needed. Otherwise, if the
2071 first letter after p is r, then order is random. */
2073 else if (*argrest == 'p')
2075 if (*(++argrest) == 'c')
2078 if (*(++argrest) != 0) badarg = TRUE;
2082 if (*argrest == 'r')
2084 list_queue_option = 8;
2087 else list_queue_option = 0;
2091 /* -bp: List the contents of the mail queue, top-level only */
2093 if (*argrest == 0) {}
2095 /* -bpu: List the contents of the mail queue, top-level undelivered */
2097 else if (Ustrcmp(argrest, "u") == 0) list_queue_option += 1;
2099 /* -bpa: List the contents of the mail queue, including all delivered */
2101 else if (Ustrcmp(argrest, "a") == 0) list_queue_option += 2;
2103 /* Unknown after -bp[r] */
2113 /* -bP: List the configuration variables given as the address list.
2114 Force -v, so configuration errors get displayed. */
2116 else if (Ustrcmp(argrest, "P") == 0)
2118 list_options = TRUE;
2119 debug_selector |= D_v;
2120 debug_file = stderr;
2123 /* -brt: Test retry configuration lookup */
2125 else if (Ustrcmp(argrest, "rt") == 0)
2127 test_retry_arg = i + 1;
2131 /* -brw: Test rewrite configuration */
2133 else if (Ustrcmp(argrest, "rw") == 0)
2135 test_rewrite_arg = i + 1;
2139 /* -bS: Read SMTP commands on standard input, but produce no replies -
2140 all errors are reported by sending messages. */
2142 else if (Ustrcmp(argrest, "S") == 0)
2143 smtp_input = smtp_batched_input = receiving_message = TRUE;
2145 /* -bs: Read SMTP commands on standard input and produce SMTP replies
2146 on standard output. */
2148 else if (Ustrcmp(argrest, "s") == 0) smtp_input = receiving_message = TRUE;
2150 /* -bt: address testing mode */
2152 else if (Ustrcmp(argrest, "t") == 0)
2153 address_test_mode = checking = log_testing_mode = TRUE;
2155 /* -bv: verify addresses */
2157 else if (Ustrcmp(argrest, "v") == 0)
2158 verify_address_mode = checking = log_testing_mode = TRUE;
2160 /* -bvs: verify sender addresses */
2162 else if (Ustrcmp(argrest, "vs") == 0)
2164 verify_address_mode = checking = log_testing_mode = TRUE;
2165 verify_as_sender = TRUE;
2168 /* -bV: Print version string and support details */
2170 else if (Ustrcmp(argrest, "V") == 0)
2172 printf("Exim version %s #%s built %s\n", version_string,
2173 version_cnumber, version_date);
2174 printf("%s\n", CS version_copyright);
2175 version_printed = TRUE;
2176 show_whats_supported(stdout);
2179 /* -bw: inetd wait mode, accept a listening socket as stdin */
2181 else if (*argrest == 'w')
2183 inetd_wait_mode = TRUE;
2184 background_daemon = FALSE;
2185 daemon_listen = TRUE;
2186 if (*(++argrest) != '\0')
2188 inetd_wait_timeout = readconf_readtime(argrest, 0, FALSE);
2189 if (inetd_wait_timeout <= 0)
2191 fprintf(stderr, "exim: bad time value %s: abandoned\n", argv[i]);
2201 /* -C: change configuration file list; ignore if it isn't really
2202 a change! Enforce a prefix check if required. */
2207 if(++i < argc) argrest = argv[i]; else
2208 { badarg = TRUE; break; }
2210 if (Ustrcmp(config_main_filelist, argrest) != 0)
2212 #ifdef ALT_CONFIG_PREFIX
2214 int len = Ustrlen(ALT_CONFIG_PREFIX);
2215 uschar *list = argrest;
2217 while((filename = string_nextinlist(&list, &sep, big_buffer,
2218 big_buffer_size)) != NULL)
2220 if ((Ustrlen(filename) < len ||
2221 Ustrncmp(filename, ALT_CONFIG_PREFIX, len) != 0 ||
2222 Ustrstr(filename, "/../") != NULL) &&
2223 (Ustrcmp(filename, "/dev/null") != 0 || real_uid != root_uid))
2225 fprintf(stderr, "-C Permission denied\n");
2230 if (real_uid != root_uid)
2232 #ifdef TRUSTED_CONFIG_LIST
2234 if (real_uid != exim_uid
2235 #ifdef CONFIGURE_OWNER
2236 && real_uid != config_uid
2239 trusted_config = FALSE;
2242 FILE *trust_list = Ufopen(TRUSTED_CONFIG_LIST, "rb");
2245 struct stat statbuf;
2247 if (fstat(fileno(trust_list), &statbuf) != 0 ||
2248 (statbuf.st_uid != root_uid /* owner not root */
2249 #ifdef CONFIGURE_OWNER
2250 && statbuf.st_uid != config_uid /* owner not the special one */
2253 (statbuf.st_gid != root_gid /* group not root */
2254 #ifdef CONFIGURE_GROUP
2255 && statbuf.st_gid != config_gid /* group not the special one */
2257 && (statbuf.st_mode & 020) != 0 /* group writeable */
2259 (statbuf.st_mode & 2) != 0) /* world writeable */
2261 trusted_config = FALSE;
2266 /* Well, the trust list at least is up to scratch... */
2267 void *reset_point = store_get(0);
2268 uschar *trusted_configs[32];
2272 while (Ufgets(big_buffer, big_buffer_size, trust_list))
2274 uschar *start = big_buffer, *nl;
2275 while (*start && isspace(*start))
2279 nl = Ustrchr(start, '\n');
2282 trusted_configs[nr_configs++] = string_copy(start);
2283 if (nr_configs == 32)
2291 uschar *list = argrest;
2293 while (trusted_config && (filename = string_nextinlist(&list,
2294 &sep, big_buffer, big_buffer_size)) != NULL)
2296 for (i=0; i < nr_configs; i++)
2298 if (Ustrcmp(filename, trusted_configs[i]) == 0)
2301 if (i == nr_configs)
2303 trusted_config = FALSE;
2307 store_reset(reset_point);
2311 /* No valid prefixes found in trust_list file. */
2312 trusted_config = FALSE;
2318 /* Could not open trust_list file. */
2319 trusted_config = FALSE;
2323 /* Not root; don't trust config */
2324 trusted_config = FALSE;
2328 config_main_filelist = argrest;
2329 config_changed = TRUE;
2334 /* -D: set up a macro definition */
2337 #ifdef DISABLE_D_OPTION
2338 fprintf(stderr, "exim: -D is not available in this Exim binary\n");
2343 macro_item *mlast = NULL;
2346 uschar *s = argrest;
2348 while (isspace(*s)) s++;
2350 if (*s < 'A' || *s > 'Z')
2352 fprintf(stderr, "exim: macro name set by -D must start with "
2353 "an upper case letter\n");
2357 while (isalnum(*s) || *s == '_')
2359 if (ptr < sizeof(name)-1) name[ptr++] = *s;
2363 if (ptr == 0) { badarg = TRUE; break; }
2364 while (isspace(*s)) s++;
2367 if (*s++ != '=') { badarg = TRUE; break; }
2368 while (isspace(*s)) s++;
2371 for (m = macros; m != NULL; m = m->next)
2373 if (Ustrcmp(m->name, name) == 0)
2375 fprintf(stderr, "exim: duplicated -D in command line\n");
2381 m = store_get(sizeof(macro_item) + Ustrlen(name));
2383 m->command_line = TRUE;
2384 if (mlast == NULL) macros = m; else mlast->next = m;
2385 Ustrcpy(m->name, name);
2386 m->replacement = string_copy(s);
2388 if (clmacro_count >= MAX_CLMACROS)
2390 fprintf(stderr, "exim: too many -D options on command line\n");
2393 clmacros[clmacro_count++] = string_sprintf("-D%s=%s", m->name,
2399 /* -d: Set debug level (see also -v below) or set the drop_cr option.
2400 The latter is now a no-op, retained for compatibility only. If -dd is used,
2401 debugging subprocesses of the daemon is disabled. */
2404 if (Ustrcmp(argrest, "ropcr") == 0)
2406 /* drop_cr = TRUE; */
2409 /* Use an intermediate variable so that we don't set debugging while
2410 decoding the debugging bits. */
2414 unsigned int selector = D_default;
2417 if (*argrest == 'd')
2419 debug_daemon = TRUE;
2423 decode_bits(&selector, NULL, D_memory, 0, argrest, debug_options,
2424 debug_options_count, US"debug", 0);
2425 debug_selector = selector;
2430 /* -E: This is a local error message. This option is not intended for
2431 external use at all, but is not restricted to trusted callers because it
2432 does no harm (just suppresses certain error messages) and if Exim is run
2433 not setuid root it won't always be trusted when it generates error
2434 messages using this option. If there is a message id following -E, point
2435 message_reference at it, for logging. */
2438 local_error_message = TRUE;
2439 if (mac_ismsgid(argrest)) message_reference = argrest;
2443 /* -ex: The vacation program calls sendmail with the undocumented "-eq"
2444 option, so it looks as if historically the -oex options are also callable
2445 without the leading -o. So we have to accept them. Before the switch,
2446 anything starting -oe has been converted to -e. Exim does not support all
2447 of the sendmail error options. */
2450 if (Ustrcmp(argrest, "e") == 0)
2452 arg_error_handling = ERRORS_SENDER;
2453 errors_sender_rc = EXIT_SUCCESS;
2455 else if (Ustrcmp(argrest, "m") == 0) arg_error_handling = ERRORS_SENDER;
2456 else if (Ustrcmp(argrest, "p") == 0) arg_error_handling = ERRORS_STDERR;
2457 else if (Ustrcmp(argrest, "q") == 0) arg_error_handling = ERRORS_STDERR;
2458 else if (Ustrcmp(argrest, "w") == 0) arg_error_handling = ERRORS_SENDER;
2463 /* -F: Set sender's full name, used instead of the gecos entry from
2464 the password file. Since users can usually alter their gecos entries,
2465 there's no security involved in using this instead. The data can follow
2466 the -F or be in the next argument. */
2471 if(++i < argc) argrest = argv[i]; else
2472 { badarg = TRUE; break; }
2474 originator_name = argrest;
2475 sender_name_forced = TRUE;
2479 /* -f: Set sender's address - this value is only actually used if Exim is
2480 run by a trusted user, or if untrusted_set_sender is set and matches the
2481 address, except that the null address can always be set by any user. The
2482 test for this happens later, when the value given here is ignored when not
2483 permitted. For an untrusted user, the actual sender is still put in Sender:
2484 if it doesn't match the From: header (unless no_local_from_check is set).
2485 The data can follow the -f or be in the next argument. The -r switch is an
2486 obsolete form of -f but since there appear to be programs out there that
2487 use anything that sendmail has ever supported, better accept it - the
2488 synonymizing is done before the switch above.
2490 At this stage, we must allow domain literal addresses, because we don't
2491 know what the setting of allow_domain_literals is yet. Ditto for trailing
2492 dots and strip_trailing_dot. */
2500 if (i+1 < argc) argrest = argv[++i]; else
2501 { badarg = TRUE; break; }
2505 sender_address = string_sprintf(""); /* Ensure writeable memory */
2509 uschar *temp = argrest + Ustrlen(argrest) - 1;
2510 while (temp >= argrest && isspace(*temp)) temp--;
2511 if (temp >= argrest && *temp == '.') f_end_dot = TRUE;
2512 allow_domain_literals = TRUE;
2513 strip_trailing_dot = TRUE;
2514 sender_address = parse_extract_address(argrest, &errmess, &start, &end,
2515 &sender_address_domain, TRUE);
2516 allow_domain_literals = FALSE;
2517 strip_trailing_dot = FALSE;
2518 if (sender_address == NULL)
2520 fprintf(stderr, "exim: bad -f address \"%s\": %s\n", argrest, errmess);
2521 return EXIT_FAILURE;
2524 sender_address_forced = TRUE;
2528 /* -G: sendmail invocation to specify that it's a gateway submission and
2529 sendmail may complain about problems instead of fixing them.
2530 We make it equivalent to an ACL "control = suppress_local_fixups" and do
2531 not at this time complain about problems. */
2537 /* -h: Set the hop count for an incoming message. Exim does not currently
2538 support this; it always computes it by counting the Received: headers.
2539 To put it in will require a change to the spool header file format. */
2544 if(++i < argc) argrest = argv[i]; else
2545 { badarg = TRUE; break; }
2547 if (!isdigit(*argrest)) badarg = TRUE;
2551 /* -i: Set flag so dot doesn't end non-SMTP input (same as -oi, seems
2552 not to be documented for sendmail but mailx (at least) uses it) */
2555 if (*argrest == 0) dot_ends = FALSE; else badarg = TRUE;
2559 /* -L: set the identifier used for syslog; equivalent to setting
2560 syslog_processname in the config file, but needs to be an admin option. */
2563 if (*argrest == '\0')
2565 if(++i < argc) argrest = argv[i]; else
2566 { badarg = TRUE; break; }
2568 sz = Ustrlen(argrest);
2571 fprintf(stderr, "exim: the -L syslog name is too long: \"%s\"\n", argrest);
2572 return EXIT_FAILURE;
2576 fprintf(stderr, "exim: the -L syslog name is too short\n");
2577 return EXIT_FAILURE;
2579 cmdline_syslog_name = argrest;
2583 receiving_message = FALSE;
2585 /* -MC: continue delivery of another message via an existing open
2586 file descriptor. This option is used for an internal call by the
2587 smtp transport when there is a pending message waiting to go to an
2588 address to which it has got a connection. Five subsequent arguments are
2589 required: transport name, host name, IP address, sequence number, and
2590 message_id. Transports may decline to create new processes if the sequence
2591 number gets too big. The channel is stdin. This (-MC) must be the last
2592 argument. There's a subsequent check that the real-uid is privileged.
2594 If we are running in the test harness. delay for a bit, to let the process
2595 that set this one up complete. This makes for repeatability of the logging,
2598 if (Ustrcmp(argrest, "C") == 0)
2600 union sockaddr_46 interface_sock;
2601 EXIM_SOCKLEN_T size = sizeof(interface_sock);
2605 fprintf(stderr, "exim: too many or too few arguments after -MC\n");
2606 return EXIT_FAILURE;
2609 if (msg_action_arg >= 0)
2611 fprintf(stderr, "exim: incompatible arguments\n");
2612 return EXIT_FAILURE;
2615 continue_transport = argv[++i];
2616 continue_hostname = argv[++i];
2617 continue_host_address = argv[++i];
2618 continue_sequence = Uatoi(argv[++i]);
2619 msg_action = MSG_DELIVER;
2620 msg_action_arg = ++i;
2621 forced_delivery = TRUE;
2622 queue_run_pid = passed_qr_pid;
2623 queue_run_pipe = passed_qr_pipe;
2625 if (!mac_ismsgid(argv[i]))
2627 fprintf(stderr, "exim: malformed message id %s after -MC option\n",
2629 return EXIT_FAILURE;
2632 /* Set up $sending_ip_address and $sending_port */
2634 if (getsockname(fileno(stdin), (struct sockaddr *)(&interface_sock),
2636 sending_ip_address = host_ntoa(-1, &interface_sock, NULL,
2640 fprintf(stderr, "exim: getsockname() failed after -MC option: %s\n",
2642 return EXIT_FAILURE;
2645 if (running_in_test_harness) millisleep(500);
2649 /* -MCA: set the smtp_authenticated flag; this is useful only when it
2650 precedes -MC (see above). The flag indicates that the host to which
2651 Exim is connected has accepted an AUTH sequence. */
2653 else if (Ustrcmp(argrest, "CA") == 0)
2655 smtp_authenticated = TRUE;
2659 /* -MCP: set the smtp_use_pipelining flag; this is useful only when
2660 it preceded -MC (see above) */
2662 else if (Ustrcmp(argrest, "CP") == 0)
2664 smtp_use_pipelining = TRUE;
2668 /* -MCQ: pass on the pid of the queue-running process that started
2669 this chain of deliveries and the fd of its synchronizing pipe; this
2670 is useful only when it precedes -MC (see above) */
2672 else if (Ustrcmp(argrest, "CQ") == 0)
2674 if(++i < argc) passed_qr_pid = (pid_t)(Uatol(argv[i]));
2676 if(++i < argc) passed_qr_pipe = (int)(Uatol(argv[i]));
2681 /* -MCS: set the smtp_use_size flag; this is useful only when it
2682 precedes -MC (see above) */
2684 else if (Ustrcmp(argrest, "CS") == 0)
2686 smtp_use_size = TRUE;
2690 /* -MCT: set the tls_offered flag; this is useful only when it
2691 precedes -MC (see above). The flag indicates that the host to which
2692 Exim is connected has offered TLS support. */
2695 else if (Ustrcmp(argrest, "CT") == 0)
2702 /* -M[x]: various operations on the following list of message ids:
2703 -M deliver the messages, ignoring next retry times and thawing
2704 -Mc deliver the messages, checking next retry times, no thawing
2705 -Mf freeze the messages
2706 -Mg give up on the messages
2707 -Mt thaw the messages
2708 -Mrm remove the messages
2709 In the above cases, this must be the last option. There are also the
2710 following options which are followed by a single message id, and which
2711 act on that message. Some of them use the "recipient" addresses as well.
2712 -Mar add recipient(s)
2713 -Mmad mark all recipients delivered
2714 -Mmd mark recipients(s) delivered
2716 -Mset load a message for use with -be
2718 -Mvc show copy (of whole message, in RFC 2822 format)
2723 else if (*argrest == 0)
2725 msg_action = MSG_DELIVER;
2726 forced_delivery = deliver_force_thaw = TRUE;
2728 else if (Ustrcmp(argrest, "ar") == 0)
2730 msg_action = MSG_ADD_RECIPIENT;
2731 one_msg_action = TRUE;
2733 else if (Ustrcmp(argrest, "c") == 0) msg_action = MSG_DELIVER;
2734 else if (Ustrcmp(argrest, "es") == 0)
2736 msg_action = MSG_EDIT_SENDER;
2737 one_msg_action = TRUE;
2739 else if (Ustrcmp(argrest, "f") == 0) msg_action = MSG_FREEZE;
2740 else if (Ustrcmp(argrest, "g") == 0)
2742 msg_action = MSG_DELIVER;
2743 deliver_give_up = TRUE;
2745 else if (Ustrcmp(argrest, "mad") == 0)
2747 msg_action = MSG_MARK_ALL_DELIVERED;
2749 else if (Ustrcmp(argrest, "md") == 0)
2751 msg_action = MSG_MARK_DELIVERED;
2752 one_msg_action = TRUE;
2754 else if (Ustrcmp(argrest, "rm") == 0) msg_action = MSG_REMOVE;
2755 else if (Ustrcmp(argrest, "set") == 0)
2757 msg_action = MSG_LOAD;
2758 one_msg_action = TRUE;
2760 else if (Ustrcmp(argrest, "t") == 0) msg_action = MSG_THAW;
2761 else if (Ustrcmp(argrest, "vb") == 0)
2763 msg_action = MSG_SHOW_BODY;
2764 one_msg_action = TRUE;
2766 else if (Ustrcmp(argrest, "vc") == 0)
2768 msg_action = MSG_SHOW_COPY;
2769 one_msg_action = TRUE;
2771 else if (Ustrcmp(argrest, "vh") == 0)
2773 msg_action = MSG_SHOW_HEADER;
2774 one_msg_action = TRUE;
2776 else if (Ustrcmp(argrest, "vl") == 0)
2778 msg_action = MSG_SHOW_LOG;
2779 one_msg_action = TRUE;
2781 else { badarg = TRUE; break; }
2783 /* All the -Mxx options require at least one message id. */
2785 msg_action_arg = i + 1;
2786 if (msg_action_arg >= argc)
2788 fprintf(stderr, "exim: no message ids given after %s option\n", arg);
2789 return EXIT_FAILURE;
2792 /* Some require only message ids to follow */
2794 if (!one_msg_action)
2797 for (j = msg_action_arg; j < argc; j++) if (!mac_ismsgid(argv[j]))
2799 fprintf(stderr, "exim: malformed message id %s after %s option\n",
2801 return EXIT_FAILURE;
2803 goto END_ARG; /* Remaining args are ids */
2806 /* Others require only one message id, possibly followed by addresses,
2807 which will be handled as normal arguments. */
2811 if (!mac_ismsgid(argv[msg_action_arg]))
2813 fprintf(stderr, "exim: malformed message id %s after %s option\n",
2814 argv[msg_action_arg], arg);
2815 return EXIT_FAILURE;
2822 /* Some programs seem to call the -om option without the leading o;
2823 for sendmail it askes for "me too". Exim always does this. */
2826 if (*argrest != 0) badarg = TRUE;
2830 /* -N: don't do delivery - a debugging option that stops transports doing
2831 their thing. It implies debugging at the D_v level. */
2836 dont_deliver = TRUE;
2837 debug_selector |= D_v;
2838 debug_file = stderr;
2844 /* -n: This means "don't alias" in sendmail, apparently.
2845 For normal invocations, it has no effect.
2846 It may affect some other options. */
2852 /* -O: Just ignore it. In sendmail, apparently -O option=value means set
2853 option to the specified value. This form uses long names. We need to handle
2854 -O option=value and -Ooption=value. */
2861 fprintf(stderr, "exim: string expected after -O\n");
2869 /* -oA: Set an argument for the bi command (sendmail's "alternate alias
2872 if (*argrest == 'A')
2874 alias_arg = argrest + 1;
2875 if (alias_arg[0] == 0)
2877 if (i+1 < argc) alias_arg = argv[++i]; else
2879 fprintf(stderr, "exim: string expected after -oA\n");
2885 /* -oB: Set a connection message max value for remote deliveries */
2887 else if (*argrest == 'B')
2889 uschar *p = argrest + 1;
2892 if (i+1 < argc && isdigit((argv[i+1][0]))) p = argv[++i]; else
2894 connection_max_messages = 1;
2903 fprintf(stderr, "exim: number expected after -oB\n");
2906 connection_max_messages = Uatoi(p);
2910 /* -odb: background delivery */
2912 else if (Ustrcmp(argrest, "db") == 0)
2914 synchronous_delivery = FALSE;
2915 arg_queue_only = FALSE;
2916 queue_only_set = TRUE;
2919 /* -odf: foreground delivery (smail-compatible option); same effect as
2920 -odi: interactive (synchronous) delivery (sendmail-compatible option)
2923 else if (Ustrcmp(argrest, "df") == 0 || Ustrcmp(argrest, "di") == 0)
2925 synchronous_delivery = TRUE;
2926 arg_queue_only = FALSE;
2927 queue_only_set = TRUE;
2930 /* -odq: queue only */
2932 else if (Ustrcmp(argrest, "dq") == 0)
2934 synchronous_delivery = FALSE;
2935 arg_queue_only = TRUE;
2936 queue_only_set = TRUE;
2939 /* -odqs: queue SMTP only - do local deliveries and remote routing,
2940 but no remote delivery */
2942 else if (Ustrcmp(argrest, "dqs") == 0)
2945 arg_queue_only = FALSE;
2946 queue_only_set = TRUE;
2949 /* -oex: Sendmail error flags. As these are also accepted without the
2950 leading -o prefix, for compatibility with vacation and other callers,
2951 they are handled with -e above. */
2953 /* -oi: Set flag so dot doesn't end non-SMTP input (same as -i)
2954 -oitrue: Another sendmail syntax for the same */
2956 else if (Ustrcmp(argrest, "i") == 0 ||
2957 Ustrcmp(argrest, "itrue") == 0)
2960 /* -oM*: Set various characteristics for an incoming message; actually
2961 acted on for trusted callers only. */
2963 else if (*argrest == 'M')
2967 fprintf(stderr, "exim: data expected after -o%s\n", argrest);
2971 /* -oMa: Set sender host address */
2973 if (Ustrcmp(argrest, "Ma") == 0) sender_host_address = argv[++i];
2975 /* -oMaa: Set authenticator name */
2977 else if (Ustrcmp(argrest, "Maa") == 0)
2978 sender_host_authenticated = argv[++i];
2980 /* -oMas: setting authenticated sender */
2982 else if (Ustrcmp(argrest, "Mas") == 0) authenticated_sender = argv[++i];
2984 /* -oMai: setting authenticated id */
2986 else if (Ustrcmp(argrest, "Mai") == 0) authenticated_id = argv[++i];
2988 /* -oMi: Set incoming interface address */
2990 else if (Ustrcmp(argrest, "Mi") == 0) interface_address = argv[++i];
2992 /* -oMr: Received protocol */
2994 else if (Ustrcmp(argrest, "Mr") == 0) received_protocol = argv[++i];
2996 /* -oMs: Set sender host name */
2998 else if (Ustrcmp(argrest, "Ms") == 0) sender_host_name = argv[++i];
3000 /* -oMt: Set sender ident */
3002 else if (Ustrcmp(argrest, "Mt") == 0)
3004 sender_ident_set = TRUE;
3005 sender_ident = argv[++i];
3008 /* Else a bad argument */
3017 /* -om: Me-too flag for aliases. Exim always does this. Some programs
3018 seem to call this as -m (undocumented), so that is also accepted (see
3021 else if (Ustrcmp(argrest, "m") == 0) {}
3023 /* -oo: An ancient flag for old-style addresses which still seems to
3024 crop up in some calls (see in SCO). */
3026 else if (Ustrcmp(argrest, "o") == 0) {}
3028 /* -oP <name>: set pid file path for daemon */
3030 else if (Ustrcmp(argrest, "P") == 0)
3031 override_pid_file_path = argv[++i];
3033 /* -or <n>: set timeout for non-SMTP acceptance
3034 -os <n>: set timeout for SMTP acceptance */
3036 else if (*argrest == 'r' || *argrest == 's')
3038 int *tp = (*argrest == 'r')?
3039 &arg_receive_timeout : &arg_smtp_receive_timeout;
3040 if (argrest[1] == 0)
3042 if (i+1 < argc) *tp= readconf_readtime(argv[++i], 0, FALSE);
3044 else *tp = readconf_readtime(argrest + 1, 0, FALSE);
3047 fprintf(stderr, "exim: bad time value %s: abandoned\n", argv[i]);
3052 /* -oX <list>: Override local_interfaces and/or default daemon ports */
3054 else if (Ustrcmp(argrest, "X") == 0)
3055 override_local_interfaces = argv[++i];
3057 /* Unknown -o argument */
3063 /* -ps: force Perl startup; -pd force delayed Perl startup */
3067 if (*argrest == 's' && argrest[1] == 0)
3069 perl_start_option = 1;
3072 if (*argrest == 'd' && argrest[1] == 0)
3074 perl_start_option = -1;
3079 /* -panythingelse is taken as the Sendmail-compatible argument -prval:sval,
3080 which sets the host protocol and host name */
3084 if (i+1 < argc) argrest = argv[++i]; else
3085 { badarg = TRUE; break; }
3090 uschar *hn = Ustrchr(argrest, ':');
3093 received_protocol = argrest;
3097 received_protocol = string_copyn(argrest, hn - argrest);
3098 sender_host_name = hn + 1;
3105 receiving_message = FALSE;
3106 if (queue_interval >= 0)
3108 fprintf(stderr, "exim: -q specified more than once\n");
3112 /* -qq...: Do queue runs in a 2-stage manner */
3114 if (*argrest == 'q')
3116 queue_2stage = TRUE;
3120 /* -qi...: Do only first (initial) deliveries */
3122 if (*argrest == 'i')
3124 queue_run_first_delivery = TRUE;
3128 /* -qf...: Run the queue, forcing deliveries
3129 -qff..: Ditto, forcing thawing as well */
3131 if (*argrest == 'f')
3133 queue_run_force = TRUE;
3134 if (*(++argrest) == 'f')
3136 deliver_force_thaw = TRUE;
3141 /* -q[f][f]l...: Run the queue only on local deliveries */
3143 if (*argrest == 'l')
3145 queue_run_local = TRUE;
3149 /* -q[f][f][l]: Run the queue, optionally forced, optionally local only,
3150 optionally starting from a given message id. */
3152 if (*argrest == 0 &&
3153 (i + 1 >= argc || argv[i+1][0] == '-' || mac_ismsgid(argv[i+1])))
3156 if (i+1 < argc && mac_ismsgid(argv[i+1]))
3157 start_queue_run_id = argv[++i];
3158 if (i+1 < argc && mac_ismsgid(argv[i+1]))
3159 stop_queue_run_id = argv[++i];
3162 /* -q[f][f][l]<n>: Run the queue at regular intervals, optionally forced,
3163 optionally local only. */
3168 queue_interval = readconf_readtime(argrest, 0, FALSE);
3170 queue_interval = readconf_readtime(argv[++i], 0, FALSE);
3171 if (queue_interval <= 0)
3173 fprintf(stderr, "exim: bad time value %s: abandoned\n", argv[i]);
3180 case 'R': /* Synonymous with -qR... */
3181 receiving_message = FALSE;
3183 /* -Rf: As -R (below) but force all deliveries,
3184 -Rff: Ditto, but also thaw all frozen messages,
3185 -Rr: String is regex
3186 -Rrf: Regex and force
3187 -Rrff: Regex and force and thaw
3189 in all cases provided there are no further characters in this
3195 for (i = 0; i < sizeof(rsopts)/sizeof(uschar *); i++)
3197 if (Ustrcmp(argrest, rsopts[i]) == 0)
3199 if (i != 2) queue_run_force = TRUE;
3200 if (i >= 2) deliver_selectstring_regex = TRUE;
3201 if (i == 1 || i == 4) deliver_force_thaw = TRUE;
3202 argrest += Ustrlen(rsopts[i]);
3207 /* -R: Set string to match in addresses for forced queue run to
3208 pick out particular messages. */
3212 if (i+1 < argc) deliver_selectstring = argv[++i]; else
3214 fprintf(stderr, "exim: string expected after -R\n");
3218 else deliver_selectstring = argrest;
3222 /* -r: an obsolete synonym for -f (see above) */
3225 /* -S: Like -R but works on sender. */
3227 case 'S': /* Synonymous with -qS... */
3228 receiving_message = FALSE;
3230 /* -Sf: As -S (below) but force all deliveries,
3231 -Sff: Ditto, but also thaw all frozen messages,
3232 -Sr: String is regex
3233 -Srf: Regex and force
3234 -Srff: Regex and force and thaw
3236 in all cases provided there are no further characters in this
3242 for (i = 0; i < sizeof(rsopts)/sizeof(uschar *); i++)
3244 if (Ustrcmp(argrest, rsopts[i]) == 0)
3246 if (i != 2) queue_run_force = TRUE;
3247 if (i >= 2) deliver_selectstring_sender_regex = TRUE;
3248 if (i == 1 || i == 4) deliver_force_thaw = TRUE;
3249 argrest += Ustrlen(rsopts[i]);
3254 /* -S: Set string to match in addresses for forced queue run to
3255 pick out particular messages. */
3259 if (i+1 < argc) deliver_selectstring_sender = argv[++i]; else
3261 fprintf(stderr, "exim: string expected after -S\n");
3265 else deliver_selectstring_sender = argrest;
3268 /* -Tqt is an option that is exclusively for use by the testing suite.
3269 It is not recognized in other circumstances. It allows for the setting up
3270 of explicit "queue times" so that various warning/retry things can be
3271 tested. Otherwise variability of clock ticks etc. cause problems. */
3274 if (running_in_test_harness && Ustrcmp(argrest, "qt") == 0)
3275 fudged_queue_times = argv[++i];
3280 /* -t: Set flag to extract recipients from body of message. */
3283 if (*argrest == 0) extract_recipients = TRUE;
3285 /* -ti: Set flag to extract recipients from body of message, and also
3286 specify that dot does not end the message. */
3288 else if (Ustrcmp(argrest, "i") == 0)
3290 extract_recipients = TRUE;
3294 /* -tls-on-connect: don't wait for STARTTLS (for old clients) */
3297 else if (Ustrcmp(argrest, "ls-on-connect") == 0) tls_in.on_connect = TRUE;
3304 /* -U: This means "initial user submission" in sendmail, apparently. The
3305 doc claims that in future sendmail may refuse syntactically invalid
3306 messages instead of fixing them. For the moment, we just ignore it. */
3312 /* -v: verify things - this is a very low-level debugging */
3317 debug_selector |= D_v;
3318 debug_file = stderr;
3324 /* -x: AIX uses this to indicate some fancy 8-bit character stuff:
3326 The -x flag tells the sendmail command that mail from a local
3327 mail program has National Language Support (NLS) extended characters
3328 in the body of the mail item. The sendmail command can send mail with
3329 extended NLS characters across networks that normally corrupts these
3332 As Exim is 8-bit clean, it just ignores this flag. */
3335 if (*argrest != 0) badarg = TRUE;
3338 /* -X: in sendmail: takes one parameter, logfile, and sends debugging
3339 logs to that file. We swallow the parameter and otherwise ignore it. */
3342 if (*argrest == '\0')
3346 fprintf(stderr, "exim: string expected after -X\n");
3352 /* All other initial characters are errors */
3357 } /* End of high-level switch statement */
3359 /* Failed to recognize the option, or syntax error */
3363 fprintf(stderr, "exim abandoned: unknown, malformed, or incomplete "
3364 "option %s\n", arg);
3370 /* If -R or -S have been specified without -q, assume a single queue run. */
3372 if ((deliver_selectstring != NULL || deliver_selectstring_sender != NULL) &&
3373 queue_interval < 0) queue_interval = 0;
3377 /* If usage_wanted is set we call the usage function - which never returns */
3378 if (usage_wanted) exim_usage(called_as);
3380 /* Arguments have been processed. Check for incompatibilities. */
3382 (smtp_input || extract_recipients || recipients_arg < argc) &&
3383 (daemon_listen || queue_interval >= 0 || bi_option ||
3384 test_retry_arg >= 0 || test_rewrite_arg >= 0 ||
3385 filter_test != FTEST_NONE || (msg_action_arg > 0 && !one_msg_action))
3388 msg_action_arg > 0 &&
3389 (daemon_listen || queue_interval >= 0 || list_options ||
3390 (checking && msg_action != MSG_LOAD) ||
3391 bi_option || test_retry_arg >= 0 || test_rewrite_arg >= 0)
3394 (daemon_listen || queue_interval >= 0) &&
3395 (sender_address != NULL || list_options || list_queue || checking ||
3399 daemon_listen && queue_interval == 0
3402 inetd_wait_mode && queue_interval >= 0
3406 (checking || smtp_input || extract_recipients ||
3407 filter_test != FTEST_NONE || bi_option)
3410 verify_address_mode &&
3411 (address_test_mode || smtp_input || extract_recipients ||
3412 filter_test != FTEST_NONE || bi_option)
3415 address_test_mode && (smtp_input || extract_recipients ||
3416 filter_test != FTEST_NONE || bi_option)
3419 smtp_input && (sender_address != NULL || filter_test != FTEST_NONE ||
3423 deliver_selectstring != NULL && queue_interval < 0
3426 msg_action == MSG_LOAD &&
3427 (!expansion_test || expansion_test_message != NULL)
3431 fprintf(stderr, "exim: incompatible command-line options or arguments\n");
3435 /* If debugging is set up, set the file and the file descriptor to pass on to
3436 child processes. It should, of course, be 2 for stderr. Also, force the daemon
3437 to run in the foreground. */
3439 if (debug_selector != 0)
3441 debug_file = stderr;
3442 debug_fd = fileno(debug_file);
3443 background_daemon = FALSE;
3444 if (running_in_test_harness) millisleep(100); /* lets caller finish */
3445 if (debug_selector != D_v) /* -v only doesn't show this */
3447 debug_printf("Exim version %s uid=%ld gid=%ld pid=%d D=%x\n",
3448 version_string, (long int)real_uid, (long int)real_gid, (int)getpid(),
3450 if (!version_printed)
3451 show_whats_supported(stderr);
3455 /* When started with root privilege, ensure that the limits on the number of
3456 open files and the number of processes (where that is accessible) are
3457 sufficiently large, or are unset, in case Exim has been called from an
3458 environment where the limits are screwed down. Not all OS have the ability to
3459 change some of these limits. */
3463 DEBUG(D_any) debug_print_ids(US"Exim has no root privilege:");
3469 #ifdef RLIMIT_NOFILE
3470 if (getrlimit(RLIMIT_NOFILE, &rlp) < 0)
3472 log_write(0, LOG_MAIN|LOG_PANIC, "getrlimit(RLIMIT_NOFILE) failed: %s",
3474 rlp.rlim_cur = rlp.rlim_max = 0;
3477 /* I originally chose 1000 as a nice big number that was unlikely to
3478 be exceeded. It turns out that some older OS have a fixed upper limit of
3481 if (rlp.rlim_cur < 1000)
3483 rlp.rlim_cur = rlp.rlim_max = 1000;
3484 if (setrlimit(RLIMIT_NOFILE, &rlp) < 0)
3486 rlp.rlim_cur = rlp.rlim_max = 256;
3487 if (setrlimit(RLIMIT_NOFILE, &rlp) < 0)
3488 log_write(0, LOG_MAIN|LOG_PANIC, "setrlimit(RLIMIT_NOFILE) failed: %s",
3495 if (getrlimit(RLIMIT_NPROC, &rlp) < 0)
3497 log_write(0, LOG_MAIN|LOG_PANIC, "getrlimit(RLIMIT_NPROC) failed: %s",
3499 rlp.rlim_cur = rlp.rlim_max = 0;
3502 #ifdef RLIM_INFINITY
3503 if (rlp.rlim_cur != RLIM_INFINITY && rlp.rlim_cur < 1000)
3505 rlp.rlim_cur = rlp.rlim_max = RLIM_INFINITY;
3507 if (rlp.rlim_cur < 1000)
3509 rlp.rlim_cur = rlp.rlim_max = 1000;
3511 if (setrlimit(RLIMIT_NPROC, &rlp) < 0)
3512 log_write(0, LOG_MAIN|LOG_PANIC, "setrlimit(RLIMIT_NPROC) failed: %s",
3518 /* Exim is normally entered as root (but some special configurations are
3519 possible that don't do this). However, it always spins off sub-processes that
3520 set their uid and gid as required for local delivery. We don't want to pass on
3521 any extra groups that root may belong to, so we want to get rid of them all at
3524 We need to obey setgroups() at this stage, before possibly giving up root
3525 privilege for a changed configuration file, but later on we might need to
3526 check on the additional groups for the admin user privilege - can't do that
3527 till after reading the config, which might specify the exim gid. Therefore,
3528 save the group list here first. */
3530 group_count = getgroups(NGROUPS_MAX, group_list);
3531 if (group_count < 0)
3533 fprintf(stderr, "exim: getgroups() failed: %s\n", strerror(errno));
3537 /* There is a fundamental difference in some BSD systems in the matter of
3538 groups. FreeBSD and BSDI are known to be different; NetBSD and OpenBSD are
3539 known not to be different. On the "different" systems there is a single group
3540 list, and the first entry in it is the current group. On all other versions of
3541 Unix there is a supplementary group list, which is in *addition* to the current
3542 group. Consequently, to get rid of all extraneous groups on a "standard" system
3543 you pass over 0 groups to setgroups(), while on a "different" system you pass
3544 over a single group - the current group, which is always the first group in the
3545 list. Calling setgroups() with zero groups on a "different" system results in
3546 an error return. The following code should cope with both types of system.
3548 However, if this process isn't running as root, setgroups() can't be used
3549 since you have to be root to run it, even if throwing away groups. Not being
3550 root here happens only in some unusual configurations. We just ignore the
3553 if (setgroups(0, NULL) != 0)
3555 if (setgroups(1, group_list) != 0 && !unprivileged)
3557 fprintf(stderr, "exim: setgroups() failed: %s\n", strerror(errno));
3562 /* If the configuration file name has been altered by an argument on the
3563 command line (either a new file name or a macro definition) and the caller is
3564 not root, or if this is a filter testing run, remove any setuid privilege the
3565 program has and run as the underlying user.
3567 The exim user is locked out of this, which severely restricts the use of -C
3570 Otherwise, set the real ids to the effective values (should be root unless run
3571 from inetd, which it can either be root or the exim uid, if one is configured).
3573 There is a private mechanism for bypassing some of this, in order to make it
3574 possible to test lots of configurations automatically, without having either to
3575 recompile each time, or to patch in an actual configuration file name and other
3576 values (such as the path name). If running in the test harness, pretend that
3577 configuration file changes and macro definitions haven't happened. */
3580 (!trusted_config || /* Config changed, or */
3581 !macros_trusted()) && /* impermissible macros and */
3582 real_uid != root_uid && /* Not root, and */
3583 !running_in_test_harness /* Not fudged */
3585 expansion_test /* expansion testing */
3587 filter_test != FTEST_NONE) /* Filter testing */
3589 setgroups(group_count, group_list);
3590 exim_setugid(real_uid, real_gid, FALSE,
3591 US"-C, -D, -be or -bf forces real uid");
3592 removed_privilege = TRUE;
3594 /* In the normal case when Exim is called like this, stderr is available
3595 and should be used for any logging information because attempts to write
3596 to the log will usually fail. To arrange this, we unset really_exim. However,
3597 if no stderr is available there is no point - we might as well have a go
3598 at the log (if it fails, syslog will be written).
3600 Note that if the invoker is Exim, the logs remain available. Messing with
3601 this causes unlogged successful deliveries. */
3603 if ((log_stderr != NULL) && (real_uid != exim_uid))
3604 really_exim = FALSE;
3607 /* Privilege is to be retained for the moment. It may be dropped later,
3608 depending on the job that this Exim process has been asked to do. For now, set
3609 the real uid to the effective so that subsequent re-execs of Exim are done by a
3612 else exim_setugid(geteuid(), getegid(), FALSE, US"forcing real = effective");
3614 /* If testing a filter, open the file(s) now, before wasting time doing other
3615 setups and reading the message. */
3617 if ((filter_test & FTEST_SYSTEM) != 0)
3619 filter_sfd = Uopen(filter_test_sfile, O_RDONLY, 0);
3622 fprintf(stderr, "exim: failed to open %s: %s\n", filter_test_sfile,
3624 return EXIT_FAILURE;
3628 if ((filter_test & FTEST_USER) != 0)
3630 filter_ufd = Uopen(filter_test_ufile, O_RDONLY, 0);
3633 fprintf(stderr, "exim: failed to open %s: %s\n", filter_test_ufile,
3635 return EXIT_FAILURE;
3639 /* Initialise lookup_list
3640 If debugging, already called above via version reporting.
3641 In either case, we initialise the list of available lookups while running
3642 as root. All dynamically modules are loaded from a directory which is
3643 hard-coded into the binary and is code which, if not a module, would be
3644 part of Exim already. Ability to modify the content of the directory
3645 is equivalent to the ability to modify a setuid binary!
3647 This needs to happen before we read the main configuration. */
3650 /* Read the main runtime configuration data; this gives up if there
3651 is a failure. It leaves the configuration file open so that the subsequent
3652 configuration data for delivery can be read if needed. */
3656 /* If an action on specific messages is requested, or if a daemon or queue
3657 runner is being started, we need to know if Exim was called by an admin user.
3658 This is the case if the real user is root or exim, or if the real group is
3659 exim, or if one of the supplementary groups is exim or a group listed in
3660 admin_groups. We don't fail all message actions immediately if not admin_user,
3661 since some actions can be performed by non-admin users. Instead, set admin_user
3662 for later interrogation. */
3664 if (real_uid == root_uid || real_uid == exim_uid || real_gid == exim_gid)
3669 for (i = 0; i < group_count; i++)
3671 if (group_list[i] == exim_gid) admin_user = TRUE;
3672 else if (admin_groups != NULL)
3674 for (j = 1; j <= (int)(admin_groups[0]); j++)
3675 if (admin_groups[j] == group_list[i])
3676 { admin_user = TRUE; break; }
3678 if (admin_user) break;
3682 /* Another group of privileged users are the trusted users. These are root,
3683 exim, and any caller matching trusted_users or trusted_groups. Trusted callers
3684 are permitted to specify sender_addresses with -f on the command line, and
3685 other message parameters as well. */
3687 if (real_uid == root_uid || real_uid == exim_uid)
3688 trusted_caller = TRUE;
3693 if (trusted_users != NULL)
3695 for (i = 1; i <= (int)(trusted_users[0]); i++)
3696 if (trusted_users[i] == real_uid)
3697 { trusted_caller = TRUE; break; }
3700 if (!trusted_caller && trusted_groups != NULL)
3702 for (i = 1; i <= (int)(trusted_groups[0]); i++)
3704 if (trusted_groups[i] == real_gid)
3705 trusted_caller = TRUE;
3706 else for (j = 0; j < group_count; j++)
3708 if (trusted_groups[i] == group_list[j])
3709 { trusted_caller = TRUE; break; }
3711 if (trusted_caller) break;
3716 /* Handle the decoding of logging options. */
3718 decode_bits(&log_write_selector, &log_extra_selector, 0, 0,
3719 log_selector_string, log_options, log_options_count, US"log", 0);
3723 debug_printf("configuration file is %s\n", config_main_filename);
3724 debug_printf("log selectors = %08x %08x\n", log_write_selector,
3725 log_extra_selector);
3728 /* If domain literals are not allowed, check the sender address that was
3729 supplied with -f. Ditto for a stripped trailing dot. */
3731 if (sender_address != NULL)
3733 if (sender_address[sender_address_domain] == '[' && !allow_domain_literals)
3735 fprintf(stderr, "exim: bad -f address \"%s\": domain literals not "
3736 "allowed\n", sender_address);
3737 return EXIT_FAILURE;
3739 if (f_end_dot && !strip_trailing_dot)
3741 fprintf(stderr, "exim: bad -f address \"%s.\": domain is malformed "
3742 "(trailing dot not allowed)\n", sender_address);
3743 return EXIT_FAILURE;
3747 /* See if an admin user overrode our logging. */
3749 if (cmdline_syslog_name != NULL)
3753 syslog_processname = cmdline_syslog_name;
3754 log_file_path = string_copy(CUS"syslog");
3758 /* not a panic, non-privileged users should not be able to spam paniclog */
3760 "exim: you lack sufficient privilege to specify syslog process name\n");
3761 return EXIT_FAILURE;
3765 /* Paranoia check of maximum lengths of certain strings. There is a check
3766 on the length of the log file path in log.c, which will come into effect
3767 if there are any calls to write the log earlier than this. However, if we
3768 get this far but the string is very long, it is better to stop now than to
3769 carry on and (e.g.) receive a message and then have to collapse. The call to
3770 log_write() from here will cause the ultimate panic collapse if the complete
3771 file name exceeds the buffer length. */
3773 if (Ustrlen(log_file_path) > 200)
3774 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3775 "log_file_path is longer than 200 chars: aborting");
3777 if (Ustrlen(pid_file_path) > 200)
3778 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3779 "pid_file_path is longer than 200 chars: aborting");
3781 if (Ustrlen(spool_directory) > 200)
3782 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3783 "spool_directory is longer than 200 chars: aborting");
3785 /* Length check on the process name given to syslog for its TAG field,
3786 which is only permitted to be 32 characters or less. See RFC 3164. */
3788 if (Ustrlen(syslog_processname) > 32)
3789 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3790 "syslog_processname is longer than 32 chars: aborting");
3792 /* In some operating systems, the environment variable TMPDIR controls where
3793 temporary files are created; Exim doesn't use these (apart from when delivering
3794 to MBX mailboxes), but called libraries such as DBM libraries may require them.
3795 If TMPDIR is found in the environment, reset it to the value defined in the
3796 TMPDIR macro, if this macro is defined. */
3801 for (p = USS environ; *p != NULL; p++)
3803 if (Ustrncmp(*p, "TMPDIR=", 7) == 0 &&
3804 Ustrcmp(*p+7, TMPDIR) != 0)
3806 uschar *newp = malloc(Ustrlen(TMPDIR) + 8);
3807 sprintf(CS newp, "TMPDIR=%s", TMPDIR);
3809 DEBUG(D_any) debug_printf("reset TMPDIR=%s in environment\n", TMPDIR);
3815 /* Timezone handling. If timezone_string is "utc", set a flag to cause all
3816 timestamps to be in UTC (gmtime() is used instead of localtime()). Otherwise,
3817 we may need to get rid of a bogus timezone setting. This can arise when Exim is
3818 called by a user who has set the TZ variable. This then affects the timestamps
3819 in log files and in Received: headers, and any created Date: header lines. The
3820 required timezone is settable in the configuration file, so nothing can be done
3821 about this earlier - but hopefully nothing will normally be logged earlier than
3822 this. We have to make a new environment if TZ is wrong, but don't bother if
3823 timestamps_utc is set, because then all times are in UTC anyway. */
3825 if (timezone_string != NULL && strcmpic(timezone_string, US"UTC") == 0)
3827 timestamps_utc = TRUE;
3831 uschar *envtz = US getenv("TZ");
3832 if ((envtz == NULL && timezone_string != NULL) ||
3834 (timezone_string == NULL ||
3835 Ustrcmp(timezone_string, envtz) != 0)))
3837 uschar **p = USS environ;
3841 while (*p++ != NULL) count++;
3842 if (envtz == NULL) count++;
3843 newp = new = malloc(sizeof(uschar *) * (count + 1));
3844 for (p = USS environ; *p != NULL; p++)
3846 if (Ustrncmp(*p, "TZ=", 3) == 0) continue;
3849 if (timezone_string != NULL)
3851 *newp = malloc(Ustrlen(timezone_string) + 4);
3852 sprintf(CS *newp++, "TZ=%s", timezone_string);
3857 DEBUG(D_any) debug_printf("Reset TZ to %s: time is %s\n", timezone_string,
3858 tod_stamp(tod_log));
3862 /* Handle the case when we have removed the setuid privilege because of -C or
3863 -D. This means that the caller of Exim was not root.
3865 There is a problem if we were running as the Exim user. The sysadmin may
3866 expect this case to retain privilege because "the binary was called by the
3867 Exim user", but it hasn't, because either the -D option set macros, or the
3868 -C option set a non-trusted configuration file. There are two possibilities:
3870 (1) If deliver_drop_privilege is set, Exim is not going to re-exec in order
3871 to do message deliveries. Thus, the fact that it is running as a
3872 non-privileged user is plausible, and might be wanted in some special
3873 configurations. However, really_exim will have been set false when
3874 privilege was dropped, to stop Exim trying to write to its normal log
3875 files. Therefore, re-enable normal log processing, assuming the sysadmin
3876 has set up the log directory correctly.
3878 (2) If deliver_drop_privilege is not set, the configuration won't work as
3879 apparently intended, and so we log a panic message. In order to retain
3880 root for -C or -D, the caller must either be root or be invoking a
3881 trusted configuration file (when deliver_drop_privilege is false). */
3883 if (removed_privilege && (!trusted_config || macros != NULL) &&
3884 real_uid == exim_uid)
3886 if (deliver_drop_privilege)
3887 really_exim = TRUE; /* let logging work normally */
3889 log_write(0, LOG_MAIN|LOG_PANIC,
3890 "exim user lost privilege for using %s option",
3891 trusted_config? "-D" : "-C");
3894 /* Start up Perl interpreter if Perl support is configured and there is a
3895 perl_startup option, and the configuration or the command line specifies
3896 initializing starting. Note that the global variables are actually called
3897 opt_perl_xxx to avoid clashing with perl's namespace (perl_*). */
3900 if (perl_start_option != 0)
3901 opt_perl_at_start = (perl_start_option > 0);
3902 if (opt_perl_at_start && opt_perl_startup != NULL)
3905 DEBUG(D_any) debug_printf("Starting Perl interpreter\n");
3906 errstr = init_perl(opt_perl_startup);
3909 fprintf(stderr, "exim: error in perl_startup code: %s\n", errstr);
3910 return EXIT_FAILURE;
3912 opt_perl_started = TRUE;
3914 #endif /* EXIM_PERL */
3916 /* Log the arguments of the call if the configuration file said so. This is
3917 a debugging feature for finding out what arguments certain MUAs actually use.
3918 Don't attempt it if logging is disabled, or if listing variables or if
3919 verifying/testing addresses or expansions. */
3921 if (((debug_selector & D_any) != 0 || (log_extra_selector & LX_arguments) != 0)
3922 && really_exim && !list_options && !checking)
3925 uschar *p = big_buffer;
3927 Ustrcpy(p, "cwd= (failed)");
3928 dummy = /* quieten compiler */ getcwd(CS p+4, big_buffer_size - 4);
3930 (void)string_format(p, big_buffer_size - (p - big_buffer), " %d args:", argc);
3932 for (i = 0; i < argc; i++)
3934 int len = Ustrlen(argv[i]);
3937 if (p + len + 8 >= big_buffer + big_buffer_size)
3940 log_write(0, LOG_MAIN, "%s", big_buffer);
3941 Ustrcpy(big_buffer, "...");
3944 printing = string_printing(argv[i]);
3945 if (printing[0] == 0) quote = US"\""; else
3947 uschar *pp = printing;
3949 while (*pp != 0) if (isspace(*pp++)) { quote = US"\""; break; }
3951 sprintf(CS p, " %s%.*s%s", quote, (int)(big_buffer_size -
3952 (p - big_buffer) - 4), printing, quote);
3956 if ((log_extra_selector & LX_arguments) != 0)
3957 log_write(0, LOG_MAIN, "%s", big_buffer);
3959 debug_printf("%s\n", big_buffer);
3962 /* Set the working directory to be the top-level spool directory. We don't rely
3963 on this in the code, which always uses fully qualified names, but it's useful
3964 for core dumps etc. Don't complain if it fails - the spool directory might not
3965 be generally accessible and calls with the -C option (and others) have lost
3966 privilege by now. Before the chdir, we try to ensure that the directory exists.
3969 if (Uchdir(spool_directory) != 0)
3972 (void)directory_make(spool_directory, US"", SPOOL_DIRECTORY_MODE, FALSE);
3973 dummy = /* quieten compiler */ Uchdir(spool_directory);
3976 /* Handle calls with the -bi option. This is a sendmail option to rebuild *the*
3977 alias file. Exim doesn't have such a concept, but this call is screwed into
3978 Sun's YP makefiles. Handle this by calling a configured script, as the real
3979 user who called Exim. The -oA option can be used to pass an argument to the
3984 (void)fclose(config_file);
3985 if (bi_command != NULL)
3989 argv[i++] = bi_command;
3990 if (alias_arg != NULL) argv[i++] = alias_arg;
3993 setgroups(group_count, group_list);
3994 exim_setugid(real_uid, real_gid, FALSE, US"running bi_command");
3996 DEBUG(D_exec) debug_printf("exec %.256s %.256s\n", argv[0],
3997 (argv[1] == NULL)? US"" : argv[1]);
3999 execv(CS argv[0], (char *const *)argv);
4000 fprintf(stderr, "exim: exec failed: %s\n", strerror(errno));
4005 DEBUG(D_any) debug_printf("-bi used but bi_command not set; exiting\n");
4010 /* We moved the admin/trusted check to be immediately after reading the
4011 configuration file. We leave these prints here to ensure that syslog setup,
4012 logfile setup, and so on has already happened. */
4014 if (trusted_caller) DEBUG(D_any) debug_printf("trusted user\n");
4015 if (admin_user) DEBUG(D_any) debug_printf("admin user\n");
4017 /* Only an admin user may start the daemon or force a queue run in the default
4018 configuration, but the queue run restriction can be relaxed. Only an admin
4019 user may request that a message be returned to its sender forthwith. Only an
4020 admin user may specify a debug level greater than D_v (because it might show
4021 passwords, etc. in lookup queries). Only an admin user may request a queue
4022 count. Only an admin user can use the test interface to scan for email
4023 (because Exim will be in the spool dir and able to look at mails). */
4027 BOOL debugset = (debug_selector & ~D_v) != 0;
4028 if (deliver_give_up || daemon_listen || malware_test_file ||
4029 (count_queue && queue_list_requires_admin) ||
4030 (list_queue && queue_list_requires_admin) ||
4031 (queue_interval >= 0 && prod_requires_admin) ||
4032 (debugset && !running_in_test_harness))
4034 fprintf(stderr, "exim:%s permission denied\n", debugset? " debugging" : "");
4039 /* If the real user is not root or the exim uid, the argument for passing
4040 in an open TCP/IP connection for another message is not permitted, nor is
4041 running with the -N option for any delivery action, unless this call to exim is
4042 one that supplied an input message, or we are using a patched exim for
4043 regression testing. */
4045 if (real_uid != root_uid && real_uid != exim_uid &&
4046 (continue_hostname != NULL ||
4048 (queue_interval >= 0 || daemon_listen || msg_action_arg > 0)
4049 )) && !running_in_test_harness)
4051 fprintf(stderr, "exim: Permission denied\n");
4052 return EXIT_FAILURE;
4055 /* If the caller is not trusted, certain arguments are ignored when running for
4056 real, but are permitted when checking things (-be, -bv, -bt, -bh, -bf, -bF).
4057 Note that authority for performing certain actions on messages is tested in the
4058 queue_action() function. */
4060 if (!trusted_caller && !checking && filter_test == FTEST_NONE)
4062 sender_host_name = sender_host_address = interface_address =
4063 sender_ident = received_protocol = NULL;
4064 sender_host_port = interface_port = 0;
4065 sender_host_authenticated = authenticated_sender = authenticated_id = NULL;
4068 /* If a sender host address is set, extract the optional port number off the
4069 end of it and check its syntax. Do the same thing for the interface address.
4070 Exim exits if the syntax is bad. */
4074 if (sender_host_address != NULL)
4075 sender_host_port = check_port(sender_host_address);
4076 if (interface_address != NULL)
4077 interface_port = check_port(interface_address);
4080 /* If the caller is trusted, then they can use -G to suppress_local_fixups. */
4085 suppress_local_fixups = suppress_local_fixups_default = TRUE;
4086 DEBUG(D_acl) debug_printf("suppress_local_fixups forced on by -G\n");
4090 fprintf(stderr, "exim: permission denied (-G requires a trusted user)\n");
4091 return EXIT_FAILURE;
4095 /* If an SMTP message is being received check to see if the standard input is a
4096 TCP/IP socket. If it is, we assume that Exim was called from inetd if the
4097 caller is root or the Exim user, or if the port is a privileged one. Otherwise,
4102 union sockaddr_46 inetd_sock;
4103 EXIM_SOCKLEN_T size = sizeof(inetd_sock);
4104 if (getpeername(0, (struct sockaddr *)(&inetd_sock), &size) == 0)
4106 int family = ((struct sockaddr *)(&inetd_sock))->sa_family;
4107 if (family == AF_INET || family == AF_INET6)
4109 union sockaddr_46 interface_sock;
4110 size = sizeof(interface_sock);
4112 if (getsockname(0, (struct sockaddr *)(&interface_sock), &size) == 0)
4113 interface_address = host_ntoa(-1, &interface_sock, NULL,
4116 if (host_is_tls_on_connect_port(interface_port)) tls_in.on_connect = TRUE;
4118 if (real_uid == root_uid || real_uid == exim_uid || interface_port < 1024)
4121 sender_host_address = host_ntoa(-1, (struct sockaddr *)(&inetd_sock),
4122 NULL, &sender_host_port);
4123 if (mua_wrapper) log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Input from "
4124 "inetd is not supported when mua_wrapper is set");
4129 "exim: Permission denied (unprivileged user, unprivileged port)\n");
4130 return EXIT_FAILURE;
4136 /* If the load average is going to be needed while receiving a message, get it
4137 now for those OS that require the first call to os_getloadavg() to be done as
4138 root. There will be further calls later for each message received. */
4140 #ifdef LOAD_AVG_NEEDS_ROOT
4141 if (receiving_message &&
4142 (queue_only_load >= 0 ||
4143 (is_inetd && smtp_load_reserve >= 0)
4146 load_average = OS_GETLOADAVG();
4150 /* The queue_only configuration option can be overridden by -odx on the command
4151 line, except that if queue_only_override is false, queue_only cannot be unset
4152 from the command line. */
4154 if (queue_only_set && (queue_only_override || arg_queue_only))
4155 queue_only = arg_queue_only;
4157 /* The receive_timeout and smtp_receive_timeout options can be overridden by
4160 if (arg_receive_timeout >= 0) receive_timeout = arg_receive_timeout;
4161 if (arg_smtp_receive_timeout >= 0)
4162 smtp_receive_timeout = arg_smtp_receive_timeout;
4164 /* If Exim was started with root privilege, unless we have already removed the
4165 root privilege above as a result of -C, -D, -be, -bf or -bF, remove it now
4166 except when starting the daemon or doing some kind of delivery or address
4167 testing (-bt). These are the only cases when root need to be retained. We run
4168 as exim for -bv and -bh. However, if deliver_drop_privilege is set, root is
4169 retained only for starting the daemon. We always do the initgroups() in this
4170 situation (controlled by the TRUE below), in order to be as close as possible
4171 to the state Exim usually runs in. */
4173 if (!unprivileged && /* originally had root AND */
4174 !removed_privilege && /* still got root AND */
4175 !daemon_listen && /* not starting the daemon */
4176 queue_interval <= 0 && /* (either kind of daemon) */
4178 deliver_drop_privilege || /* requested unprivileged */
4180 queue_interval < 0 && /* not running the queue */
4181 (msg_action_arg < 0 || /* and */
4182 msg_action != MSG_DELIVER) && /* not delivering and */
4183 (!checking || !address_test_mode) /* not address checking */
4187 exim_setugid(exim_uid, exim_gid, TRUE, US"privilege not needed");
4190 /* When we are retaining a privileged uid, we still change to the exim gid. */
4195 rv = setgid(exim_gid);
4196 /* Impact of failure is that some stuff might end up with an incorrect group.
4197 We track this for failures from root, since any attempt to change privilege
4198 by root should succeed and failures should be examined. For non-root,
4199 there's no security risk. For me, it's { exim -bV } on a just-built binary,
4200 no need to complain then. */
4203 if (!(unprivileged || removed_privilege))
4206 "exim: changing group failed: %s\n", strerror(errno));
4210 DEBUG(D_any) debug_printf("changing group to %ld failed: %s\n",
4211 (long int)exim_gid, strerror(errno));
4215 /* Handle a request to scan a file for malware */
4216 if (malware_test_file)
4218 #ifdef WITH_CONTENT_SCAN
4220 set_process_info("scanning file for malware");
4221 result = malware_in_file(malware_test_file);
4224 printf("No malware found.\n");
4229 printf("Malware lookup returned non-okay/fail: %d\n", result);
4233 printf("Malware found: %s\n", malware_name);
4235 printf("Malware scan detected malware of unknown name.\n");
4237 printf("Malware scanning not enabled at compile time.\n");
4242 /* Handle a request to list the delivery queue */
4246 set_process_info("listing the queue");
4247 queue_list(list_queue_option, argv + recipients_arg, argc - recipients_arg);
4251 /* Handle a request to count the delivery queue */
4255 set_process_info("counting the queue");
4260 /* Handle actions on specific messages, except for the force delivery and
4261 message load actions, which are done below. Some actions take a whole list of
4262 message ids, which are known to continue up to the end of the arguments. Others
4263 take a single message id and then operate on the recipients list. */
4265 if (msg_action_arg > 0 && msg_action != MSG_DELIVER && msg_action != MSG_LOAD)
4267 int yield = EXIT_SUCCESS;
4268 set_process_info("acting on specified messages");
4270 if (!one_msg_action)
4272 for (i = msg_action_arg; i < argc; i++)
4273 if (!queue_action(argv[i], msg_action, NULL, 0, 0))
4274 yield = EXIT_FAILURE;
4277 else if (!queue_action(argv[msg_action_arg], msg_action, argv, argc,
4278 recipients_arg)) yield = EXIT_FAILURE;
4282 /* We used to set up here to skip reading the ACL section, on
4283 (msg_action_arg > 0 || (queue_interval == 0 && !daemon_listen)
4284 Now, since the intro of the ${acl } expansion, ACL definitions may be
4285 needed in transports so we lost the optimisation. */
4289 /* The configuration data will have been read into POOL_PERM because we won't
4290 ever want to reset back past it. Change the current pool to POOL_MAIN. In fact,
4291 this is just a bit of pedantic tidiness. It wouldn't really matter if the
4292 configuration were read into POOL_MAIN, because we don't do any resets till
4293 later on. However, it seems right, and it does ensure that both pools get used.
4296 store_pool = POOL_MAIN;
4298 /* Handle the -brt option. This is for checking out retry configurations.
4299 The next three arguments are a domain name or a complete address, and
4300 optionally two error numbers. All it does is to call the function that
4301 scans the retry configuration data. */
4303 if (test_retry_arg >= 0)
4305 retry_config *yield;
4306 int basic_errno = 0;
4310 if (test_retry_arg >= argc)
4312 printf("-brt needs a domain or address argument\n");
4313 exim_exit(EXIT_FAILURE);
4315 s1 = argv[test_retry_arg++];
4318 /* If the first argument contains no @ and no . it might be a local user
4319 or it might be a single-component name. Treat as a domain. */
4321 if (Ustrchr(s1, '@') == NULL && Ustrchr(s1, '.') == NULL)
4323 printf("Warning: \"%s\" contains no '@' and no '.' characters. It is "
4324 "being \ntreated as a one-component domain, not as a local part.\n\n",
4328 /* There may be an optional second domain arg. */
4330 if (test_retry_arg < argc && Ustrchr(argv[test_retry_arg], '.') != NULL)
4331 s2 = argv[test_retry_arg++];
4333 /* The final arg is an error name */
4335 if (test_retry_arg < argc)
4337 uschar *ss = argv[test_retry_arg];
4339 readconf_retry_error(ss, ss + Ustrlen(ss), &basic_errno, &more_errno);
4342 printf("%s\n", CS error);
4343 return EXIT_FAILURE;
4346 /* For the {MAIL,RCPT,DATA}_4xx errors, a value of 255 means "any", and a
4347 code > 100 as an error is for matching codes to the decade. Turn them into
4348 a real error code, off the decade. */
4350 if (basic_errno == ERRNO_MAIL4XX ||
4351 basic_errno == ERRNO_RCPT4XX ||
4352 basic_errno == ERRNO_DATA4XX)
4354 int code = (more_errno >> 8) & 255;
4356 more_errno = (more_errno & 0xffff00ff) | (21 << 8);
4357 else if (code > 100)
4358 more_errno = (more_errno & 0xffff00ff) | ((code - 96) << 8);
4362 yield = retry_find_config(s1, s2, basic_errno, more_errno);
4363 if (yield == NULL) printf("No retry information found\n"); else
4366 more_errno = yield->more_errno;
4367 printf("Retry rule: %s ", yield->pattern);
4369 if (yield->basic_errno == ERRNO_EXIMQUOTA)
4371 printf("quota%s%s ",
4372 (more_errno > 0)? "_" : "",
4373 (more_errno > 0)? readconf_printtime(more_errno) : US"");
4375 else if (yield->basic_errno == ECONNREFUSED)
4377 printf("refused%s%s ",
4378 (more_errno > 0)? "_" : "",
4379 (more_errno == 'M')? "MX" :
4380 (more_errno == 'A')? "A" : "");
4382 else if (yield->basic_errno == ETIMEDOUT)
4385 if ((more_errno & RTEF_CTOUT) != 0) printf("_connect");
4387 if (more_errno != 0) printf("_%s",
4388 (more_errno == 'M')? "MX" : "A");
4391 else if (yield->basic_errno == ERRNO_AUTHFAIL)
4392 printf("auth_failed ");
4395 for (r = yield->rules; r != NULL; r = r->next)
4397 printf("%c,%s", r->rule, readconf_printtime(r->timeout)); /* Do not */
4398 printf(",%s", readconf_printtime(r->p1)); /* amalgamate */
4404 printf(",%d.", x/1000);
4418 exim_exit(EXIT_SUCCESS);
4421 /* Handle a request to list one or more configuration options */
4422 /* If -n was set, we suppress some information */
4426 set_process_info("listing variables");
4427 if (recipients_arg >= argc) readconf_print(US"all", NULL, flag_n);
4428 else for (i = recipients_arg; i < argc; i++)
4431 (Ustrcmp(argv[i], "router") == 0 ||
4432 Ustrcmp(argv[i], "transport") == 0 ||
4433 Ustrcmp(argv[i], "authenticator") == 0 ||
4434 Ustrcmp(argv[i], "macro") == 0))
4436 readconf_print(argv[i+1], argv[i], flag_n);
4439 else readconf_print(argv[i], NULL, flag_n);
4441 exim_exit(EXIT_SUCCESS);
4445 /* Handle a request to deliver one or more messages that are already on the
4446 queue. Values of msg_action other than MSG_DELIVER and MSG_LOAD are dealt with
4447 above. MSG_LOAD is handled with -be (which is the only time it applies) below.
4449 Delivery of specific messages is typically used for a small number when
4450 prodding by hand (when the option forced_delivery will be set) or when
4451 re-execing to regain root privilege. Each message delivery must happen in a
4452 separate process, so we fork a process for each one, and run them sequentially
4453 so that debugging output doesn't get intertwined, and to avoid spawning too
4454 many processes if a long list is given. However, don't fork for the last one;
4455 this saves a process in the common case when Exim is called to deliver just one
4458 if (msg_action_arg > 0 && msg_action != MSG_LOAD)
4460 if (prod_requires_admin && !admin_user)
4462 fprintf(stderr, "exim: Permission denied\n");
4463 exim_exit(EXIT_FAILURE);
4465 set_process_info("delivering specified messages");
4466 if (deliver_give_up) forced_delivery = deliver_force_thaw = TRUE;
4467 for (i = msg_action_arg; i < argc; i++)
4472 (void)deliver_message(argv[i], forced_delivery, deliver_give_up);
4473 else if ((pid = fork()) == 0)
4475 (void)deliver_message(argv[i], forced_delivery, deliver_give_up);
4476 _exit(EXIT_SUCCESS);
4480 fprintf(stderr, "failed to fork delivery process for %s: %s\n", argv[i],
4482 exim_exit(EXIT_FAILURE);
4486 exim_exit(EXIT_SUCCESS);
4490 /* If only a single queue run is requested, without SMTP listening, we can just
4491 turn into a queue runner, with an optional starting message id. */
4493 if (queue_interval == 0 && !daemon_listen)
4495 DEBUG(D_queue_run) debug_printf("Single queue run%s%s%s%s\n",
4496 (start_queue_run_id == NULL)? US"" : US" starting at ",
4497 (start_queue_run_id == NULL)? US"" : start_queue_run_id,
4498 (stop_queue_run_id == NULL)? US"" : US" stopping at ",
4499 (stop_queue_run_id == NULL)? US"" : stop_queue_run_id);
4500 set_process_info("running the queue (single queue run)");
4501 queue_run(start_queue_run_id, stop_queue_run_id, FALSE);
4502 exim_exit(EXIT_SUCCESS);
4506 /* Find the login name of the real user running this process. This is always
4507 needed when receiving a message, because it is written into the spool file. It
4508 may also be used to construct a from: or a sender: header, and in this case we
4509 need the user's full name as well, so save a copy of it, checked for RFC822
4510 syntax and munged if necessary, if it hasn't previously been set by the -F
4511 argument. We may try to get the passwd entry more than once, in case NIS or
4512 other delays are in evidence. Save the home directory for use in filter testing
4517 if ((pw = getpwuid(real_uid)) != NULL)
4519 originator_login = string_copy(US pw->pw_name);
4520 originator_home = string_copy(US pw->pw_dir);
4522 /* If user name has not been set by -F, set it from the passwd entry
4523 unless -f has been used to set the sender address by a trusted user. */
4525 if (originator_name == NULL)
4527 if (sender_address == NULL ||
4528 (!trusted_caller && filter_test == FTEST_NONE))
4530 uschar *name = US pw->pw_gecos;
4531 uschar *amp = Ustrchr(name, '&');
4534 /* Most Unix specify that a '&' character in the gecos field is
4535 replaced by a copy of the login name, and some even specify that
4536 the first character should be upper cased, so that's what we do. */
4541 string_format(buffer, sizeof(buffer), "%.*s%n%s%s",
4542 amp - name, name, &loffset, originator_login, amp + 1);
4543 buffer[loffset] = toupper(buffer[loffset]);
4547 /* If a pattern for matching the gecos field was supplied, apply
4548 it and then expand the name string. */
4550 if (gecos_pattern != NULL && gecos_name != NULL)
4553 re = regex_must_compile(gecos_pattern, FALSE, TRUE); /* Use malloc */
4555 if (regex_match_and_setup(re, name, 0, -1))
4557 uschar *new_name = expand_string(gecos_name);
4559 if (new_name != NULL)
4561 DEBUG(D_receive) debug_printf("user name \"%s\" extracted from "
4562 "gecos field \"%s\"\n", new_name, name);
4565 else DEBUG(D_receive) debug_printf("failed to expand gecos_name string "
4566 "\"%s\": %s\n", gecos_name, expand_string_message);
4568 else DEBUG(D_receive) debug_printf("gecos_pattern \"%s\" did not match "
4569 "gecos field \"%s\"\n", gecos_pattern, name);
4570 store_free((void *)re);
4572 originator_name = string_copy(name);
4575 /* A trusted caller has used -f but not -F */
4577 else originator_name = US"";
4580 /* Break the retry loop */
4585 if (++i > finduser_retries) break;
4589 /* If we cannot get a user login, log the incident and give up, unless the
4590 configuration specifies something to use. When running in the test harness,
4591 any setting of unknown_login overrides the actual name. */
4593 if (originator_login == NULL || running_in_test_harness)
4595 if (unknown_login != NULL)
4597 originator_login = expand_string(unknown_login);
4598 if (originator_name == NULL && unknown_username != NULL)
4599 originator_name = expand_string(unknown_username);
4600 if (originator_name == NULL) originator_name = US"";
4602 if (originator_login == NULL)
4603 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Failed to get user name for uid %d",
4607 /* Ensure that the user name is in a suitable form for use as a "phrase" in an
4610 originator_name = string_copy(parse_fix_phrase(originator_name,
4611 Ustrlen(originator_name), big_buffer, big_buffer_size));
4613 /* If a message is created by this call of Exim, the uid/gid of its originator
4614 are those of the caller. These values are overridden if an existing message is
4615 read in from the spool. */
4617 originator_uid = real_uid;
4618 originator_gid = real_gid;
4620 DEBUG(D_receive) debug_printf("originator: uid=%d gid=%d login=%s name=%s\n",
4621 (int)originator_uid, (int)originator_gid, originator_login, originator_name);
4623 /* Run in daemon and/or queue-running mode. The function daemon_go() never
4624 returns. We leave this till here so that the originator_ fields are available
4625 for incoming messages via the daemon. The daemon cannot be run in mua_wrapper
4628 if (daemon_listen || inetd_wait_mode || queue_interval > 0)
4632 fprintf(stderr, "Daemon cannot be run when mua_wrapper is set\n");
4633 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Daemon cannot be run when "
4634 "mua_wrapper is set");
4639 /* If the sender ident has not been set (by a trusted caller) set it to
4640 the caller. This will get overwritten below for an inetd call. If a trusted
4641 caller has set it empty, unset it. */
4643 if (sender_ident == NULL) sender_ident = originator_login;
4644 else if (sender_ident[0] == 0) sender_ident = NULL;
4646 /* Handle the -brw option, which is for checking out rewriting rules. Cause log
4647 writes (on errors) to go to stderr instead. Can't do this earlier, as want the
4648 originator_* variables set. */
4650 if (test_rewrite_arg >= 0)
4652 really_exim = FALSE;
4653 if (test_rewrite_arg >= argc)
4655 printf("-brw needs an address argument\n");
4656 exim_exit(EXIT_FAILURE);
4658 rewrite_test(argv[test_rewrite_arg]);
4659 exim_exit(EXIT_SUCCESS);
4662 /* A locally-supplied message is considered to be coming from a local user
4663 unless a trusted caller supplies a sender address with -f, or is passing in the
4664 message via SMTP (inetd invocation or otherwise). */
4666 if ((sender_address == NULL && !smtp_input) ||
4667 (!trusted_caller && filter_test == FTEST_NONE))
4669 sender_local = TRUE;
4671 /* A trusted caller can supply authenticated_sender and authenticated_id
4672 via -oMas and -oMai and if so, they will already be set. Otherwise, force
4673 defaults except when host checking. */
4675 if (authenticated_sender == NULL && !host_checking)
4676 authenticated_sender = string_sprintf("%s@%s", originator_login,
4677 qualify_domain_sender);
4678 if (authenticated_id == NULL && !host_checking)
4679 authenticated_id = originator_login;
4682 /* Trusted callers are always permitted to specify the sender address.
4683 Untrusted callers may specify it if it matches untrusted_set_sender, or if what
4684 is specified is the empty address. However, if a trusted caller does not
4685 specify a sender address for SMTP input, we leave sender_address unset. This
4686 causes the MAIL commands to be honoured. */
4688 if ((!smtp_input && sender_address == NULL) ||
4689 !receive_check_set_sender(sender_address))
4691 /* Either the caller is not permitted to set a general sender, or this is
4692 non-SMTP input and the trusted caller has not set a sender. If there is no
4693 sender, or if a sender other than <> is set, override with the originator's
4694 login (which will get qualified below), except when checking things. */
4696 if (sender_address == NULL /* No sender_address set */
4698 (sender_address[0] != 0 && /* Non-empty sender address, AND */
4699 !checking && /* Not running tests, AND */
4700 filter_test == FTEST_NONE)) /* Not testing a filter */
4702 sender_address = originator_login;
4703 sender_address_forced = FALSE;
4704 sender_address_domain = 0;
4708 /* Remember whether an untrusted caller set the sender address */
4710 sender_set_untrusted = sender_address != originator_login && !trusted_caller;
4712 /* Ensure that the sender address is fully qualified unless it is the empty
4713 address, which indicates an error message, or doesn't exist (root caller, smtp
4714 interface, no -f argument). */
4716 if (sender_address != NULL && sender_address[0] != 0 &&
4717 sender_address_domain == 0)
4718 sender_address = string_sprintf("%s@%s", local_part_quote(sender_address),
4719 qualify_domain_sender);
4721 DEBUG(D_receive) debug_printf("sender address = %s\n", sender_address);
4723 /* Handle a request to verify a list of addresses, or test them for delivery.
4724 This must follow the setting of the sender address, since routers can be
4725 predicated upon the sender. If no arguments are given, read addresses from
4726 stdin. Set debug_level to at least D_v to get full output for address testing.
4729 if (verify_address_mode || address_test_mode)
4732 int flags = vopt_qualify;
4734 if (verify_address_mode)
4736 if (!verify_as_sender) flags |= vopt_is_recipient;
4737 DEBUG(D_verify) debug_print_ids(US"Verifying:");
4742 flags |= vopt_is_recipient;
4743 debug_selector |= D_v;
4744 debug_file = stderr;
4745 debug_fd = fileno(debug_file);
4746 DEBUG(D_verify) debug_print_ids(US"Address testing:");
4749 if (recipients_arg < argc)
4751 while (recipients_arg < argc)
4753 uschar *s = argv[recipients_arg++];
4756 BOOL finished = FALSE;
4757 uschar *ss = parse_find_address_end(s, FALSE);
4758 if (*ss == ',') *ss = 0; else finished = TRUE;
4759 test_address(s, flags, &exit_value);
4762 while (*(++s) != 0 && (*s == ',' || isspace(*s)));
4769 uschar *s = get_stdinput(NULL, NULL);
4770 if (s == NULL) break;
4771 test_address(s, flags, &exit_value);
4775 exim_exit(exit_value);
4778 /* Handle expansion checking. Either expand items on the command line, or read
4779 from stdin if there aren't any. If -Mset was specified, load the message so
4780 that its variables can be used, but restrict this facility to admin users.
4781 Otherwise, if -bem was used, read a message from stdin. */
4785 if (msg_action_arg > 0 && msg_action == MSG_LOAD)
4787 uschar spoolname[256]; /* Not big_buffer; used in spool_read_header() */
4790 fprintf(stderr, "exim: permission denied\n");
4793 message_id = argv[msg_action_arg];
4794 (void)string_format(spoolname, sizeof(spoolname), "%s-H", message_id);
4795 if (!spool_open_datafile(message_id))
4796 printf ("Failed to load message datafile %s\n", message_id);
4797 if (spool_read_header(spoolname, TRUE, FALSE) != spool_read_OK)
4798 printf ("Failed to load message %s\n", message_id);
4801 /* Read a test message from a file. We fudge it up to be on stdin, saving
4802 stdin itself for later reading of expansion strings. */
4804 else if (expansion_test_message != NULL)
4806 int save_stdin = dup(0);
4807 int fd = Uopen(expansion_test_message, O_RDONLY, 0);
4810 fprintf(stderr, "exim: failed to open %s: %s\n", expansion_test_message,
4812 return EXIT_FAILURE;
4815 filter_test = FTEST_USER; /* Fudge to make it look like filter test */
4816 message_ended = END_NOTENDED;
4817 read_message_body(receive_msg(extract_recipients));
4818 message_linecount += body_linecount;
4819 (void)dup2(save_stdin, 0);
4820 (void)close(save_stdin);
4821 clearerr(stdin); /* Required by Darwin */
4824 /* Allow $recipients for this testing */
4826 enable_dollar_recipients = TRUE;
4828 /* Expand command line items */
4830 if (recipients_arg < argc)
4832 while (recipients_arg < argc)
4834 uschar *s = argv[recipients_arg++];
4835 uschar *ss = expand_string(s);
4836 if (ss == NULL) printf ("Failed: %s\n", expand_string_message);
4837 else printf("%s\n", CS ss);
4845 char *(*fn_readline)(const char *) = NULL;
4846 void (*fn_addhist)(const char *) = NULL;
4849 void *dlhandle = set_readline(&fn_readline, &fn_addhist);
4855 uschar *source = get_stdinput(fn_readline, fn_addhist);
4856 if (source == NULL) break;
4857 ss = expand_string(source);
4859 printf ("Failed: %s\n", expand_string_message);
4860 else printf("%s\n", CS ss);
4864 if (dlhandle != NULL) dlclose(dlhandle);
4868 /* The data file will be open after -Mset */
4870 if (deliver_datafile >= 0)
4872 (void)close(deliver_datafile);
4873 deliver_datafile = -1;
4876 exim_exit(EXIT_SUCCESS);
4880 /* The active host name is normally the primary host name, but it can be varied
4881 for hosts that want to play several parts at once. We need to ensure that it is
4882 set for host checking, and for receiving messages. */
4884 smtp_active_hostname = primary_hostname;
4885 if (raw_active_hostname != NULL)
4887 uschar *nah = expand_string(raw_active_hostname);
4890 if (!expand_string_forcedfail)
4891 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to expand \"%s\" "
4892 "(smtp_active_hostname): %s", raw_active_hostname,
4893 expand_string_message);
4895 else if (nah[0] != 0) smtp_active_hostname = nah;
4898 /* Handle host checking: this facility mocks up an incoming SMTP call from a
4899 given IP address so that the blocking and relay configuration can be tested.
4900 Unless a sender_ident was set by -oMt, we discard it (the default is the
4901 caller's login name). An RFC 1413 call is made only if we are running in the
4902 test harness and an incoming interface and both ports are specified, because
4903 there is no TCP/IP call to find the ident for. */
4910 if (!sender_ident_set)
4912 sender_ident = NULL;
4913 if (running_in_test_harness && sender_host_port != 0 &&
4914 interface_address != NULL && interface_port != 0)
4915 verify_get_ident(1413);
4918 /* In case the given address is a non-canonical IPv6 address, canonicize
4919 it. The code works for both IPv4 and IPv6, as it happens. */
4921 size = host_aton(sender_host_address, x);
4922 sender_host_address = store_get(48); /* large enough for full IPv6 */
4923 (void)host_nmtoa(size, x, -1, sender_host_address, ':');
4925 /* Now set up for testing */
4927 host_build_sender_fullhost();
4931 sender_local = FALSE;
4932 sender_host_notsocket = TRUE;
4933 debug_file = stderr;
4934 debug_fd = fileno(debug_file);
4935 fprintf(stdout, "\n**** SMTP testing session as if from host %s\n"
4936 "**** but without any ident (RFC 1413) callback.\n"
4937 "**** This is not for real!\n\n",
4938 sender_host_address);
4940 if (verify_check_host(&hosts_connection_nolog) == OK)
4941 log_write_selector &= ~L_smtp_connection;
4942 log_write(L_smtp_connection, LOG_MAIN, "%s", smtp_get_connection_info());
4944 /* NOTE: We do *not* call smtp_log_no_mail() if smtp_start_session() fails,
4945 because a log line has already been written for all its failure exists
4946 (usually "connection refused: <reason>") and writing another one is
4947 unnecessary clutter. */
4949 if (smtp_start_session())
4951 reset_point = store_get(0);
4954 store_reset(reset_point);
4955 if (smtp_setup_msg() <= 0) break;
4956 if (!receive_msg(FALSE)) break;
4960 exim_exit(EXIT_SUCCESS);
4964 /* Arrange for message reception if recipients or SMTP were specified;
4965 otherwise complain unless a version print (-bV) happened or this is a filter
4966 verification test or info dump.
4967 In the former case, show the configuration file name. */
4969 if (recipients_arg >= argc && !extract_recipients && !smtp_input)
4971 if (version_printed)
4973 printf("Configuration file is %s\n", config_main_filename);
4974 return EXIT_SUCCESS;
4977 if (info_flag != CMDINFO_NONE)
4979 show_exim_information(info_flag, info_stdout ? stdout : stderr);
4980 return info_stdout ? EXIT_SUCCESS : EXIT_FAILURE;
4983 if (filter_test == FTEST_NONE)
4984 exim_usage(called_as);
4988 /* If mua_wrapper is set, Exim is being used to turn an MUA that submits on the
4989 standard input into an MUA that submits to a smarthost over TCP/IP. We know
4990 that we are not called from inetd, because that is rejected above. The
4991 following configuration settings are forced here:
4993 (1) Synchronous delivery (-odi)
4994 (2) Errors to stderr (-oep == -oeq)
4995 (3) No parallel remote delivery
4996 (4) Unprivileged delivery
4998 We don't force overall queueing options because there are several of them;
4999 instead, queueing is avoided below when mua_wrapper is set. However, we do need
5000 to override any SMTP queueing. */
5004 synchronous_delivery = TRUE;
5005 arg_error_handling = ERRORS_STDERR;
5006 remote_max_parallel = 1;
5007 deliver_drop_privilege = TRUE;
5009 queue_smtp_domains = NULL;
5013 /* Prepare to accept one or more new messages on the standard input. When a
5014 message has been read, its id is returned in message_id[]. If doing immediate
5015 delivery, we fork a delivery process for each received message, except for the
5016 last one, where we can save a process switch.
5018 It is only in non-smtp mode that error_handling is allowed to be changed from
5019 its default of ERRORS_SENDER by argument. (Idle thought: are any of the
5020 sendmail error modes other than -oem ever actually used? Later: yes.) */
5022 if (!smtp_input) error_handling = arg_error_handling;
5024 /* If this is an inetd call, ensure that stderr is closed to prevent panic
5025 logging being sent down the socket and make an identd call to get the
5030 (void)fclose(stderr);
5031 exim_nullstd(); /* Re-open to /dev/null */
5032 verify_get_ident(IDENT_PORT);
5033 host_build_sender_fullhost();
5034 set_process_info("handling incoming connection from %s via inetd",
5038 /* If the sender host address has been set, build sender_fullhost if it hasn't
5039 already been done (which it will have been for inetd). This caters for the
5040 case when it is forced by -oMa. However, we must flag that it isn't a socket,
5041 so that the test for IP options is skipped for -bs input. */
5043 if (sender_host_address != NULL && sender_fullhost == NULL)
5045 host_build_sender_fullhost();
5046 set_process_info("handling incoming connection from %s via -oMa",
5048 sender_host_notsocket = TRUE;
5051 /* Otherwise, set the sender host as unknown except for inetd calls. This
5052 prevents host checking in the case of -bs not from inetd and also for -bS. */
5054 else if (!is_inetd) sender_host_unknown = TRUE;
5056 /* If stdout does not exist, then dup stdin to stdout. This can happen
5057 if exim is started from inetd. In this case fd 0 will be set to the socket,
5058 but fd 1 will not be set. This also happens for passed SMTP channels. */
5060 if (fstat(1, &statbuf) < 0) (void)dup2(0, 1);
5062 /* Set up the incoming protocol name and the state of the program. Root is
5063 allowed to force received protocol via the -oMr option above. If we have come
5064 via inetd, the process info has already been set up. We don't set
5065 received_protocol here for smtp input, as it varies according to
5066 batch/HELO/EHLO/AUTH/TLS. */
5070 if (!is_inetd) set_process_info("accepting a local %sSMTP message from <%s>",
5071 smtp_batched_input? "batched " : "",
5072 (sender_address!= NULL)? sender_address : originator_login);
5076 if (received_protocol == NULL)
5077 received_protocol = string_sprintf("local%s", called_as);
5078 set_process_info("accepting a local non-SMTP message from <%s>",
5082 /* Initialize the session_local_queue-only flag (this will be ignored if
5083 mua_wrapper is set) */
5086 session_local_queue_only = queue_only;
5088 /* For non-SMTP and for batched SMTP input, check that there is enough space on
5089 the spool if so configured. On failure, we must not attempt to send an error
5090 message! (For interactive SMTP, the check happens at MAIL FROM and an SMTP
5091 error code is given.) */
5093 if ((!smtp_input || smtp_batched_input) && !receive_check_fs(0))
5095 fprintf(stderr, "exim: insufficient disk space\n");
5096 return EXIT_FAILURE;
5099 /* If this is smtp input of any kind, real or batched, handle the start of the
5102 NOTE: We do *not* call smtp_log_no_mail() if smtp_start_session() fails,
5103 because a log line has already been written for all its failure exists
5104 (usually "connection refused: <reason>") and writing another one is
5105 unnecessary clutter. */
5111 if (verify_check_host(&hosts_connection_nolog) == OK)
5112 log_write_selector &= ~L_smtp_connection;
5113 log_write(L_smtp_connection, LOG_MAIN, "%s", smtp_get_connection_info());
5114 if (!smtp_start_session())
5117 exim_exit(EXIT_SUCCESS);
5121 /* Otherwise, set up the input size limit here. */
5125 thismessage_size_limit = expand_string_integer(message_size_limit, TRUE);
5126 if (expand_string_message != NULL)
5128 if (thismessage_size_limit == -1)
5129 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to expand "
5130 "message_size_limit: %s", expand_string_message);
5132 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "invalid value for "
5133 "message_size_limit: %s", expand_string_message);
5137 /* Loop for several messages when reading SMTP input. If we fork any child
5138 processes, we don't want to wait for them unless synchronous delivery is
5139 requested, so set SIGCHLD to SIG_IGN in that case. This is not necessarily the
5140 same as SIG_DFL, despite the fact that documentation often lists the default as
5141 "ignore". This is a confusing area. This is what I know:
5143 At least on some systems (e.g. Solaris), just setting SIG_IGN causes child
5144 processes that complete simply to go away without ever becoming defunct. You
5145 can't then wait for them - but we don't want to wait for them in the
5146 non-synchronous delivery case. However, this behaviour of SIG_IGN doesn't
5147 happen for all OS (e.g. *BSD is different).
5149 But that's not the end of the story. Some (many? all?) systems have the
5150 SA_NOCLDWAIT option for sigaction(). This requests the behaviour that Solaris
5151 has by default, so it seems that the difference is merely one of default
5152 (compare restarting vs non-restarting signals).
5154 To cover all cases, Exim sets SIG_IGN with SA_NOCLDWAIT here if it can. If not,
5155 it just sets SIG_IGN. To be on the safe side it also calls waitpid() at the end
5156 of the loop below. Paranoia rules.
5158 February 2003: That's *still* not the end of the story. There are now versions
5159 of Linux (where SIG_IGN does work) that are picky. If, having set SIG_IGN, a
5160 process then calls waitpid(), a grumble is written to the system log, because
5161 this is logically inconsistent. In other words, it doesn't like the paranoia.
5162 As a consequenc of this, the waitpid() below is now excluded if we are sure
5163 that SIG_IGN works. */
5165 if (!synchronous_delivery)
5168 struct sigaction act;
5169 act.sa_handler = SIG_IGN;
5170 sigemptyset(&(act.sa_mask));
5171 act.sa_flags = SA_NOCLDWAIT;
5172 sigaction(SIGCHLD, &act, NULL);
5174 signal(SIGCHLD, SIG_IGN);
5178 /* Save the current store pool point, for resetting at the start of
5179 each message, and save the real sender address, if any. */
5181 reset_point = store_get(0);
5182 real_sender_address = sender_address;
5184 /* Loop to receive messages; receive_msg() returns TRUE if there are more
5185 messages to be read (SMTP input), or FALSE otherwise (not SMTP, or SMTP channel
5190 store_reset(reset_point);
5193 /* Handle the SMTP case; call smtp_setup_mst() to deal with the initial SMTP
5194 input and build the recipients list, before calling receive_msg() to read the
5195 message proper. Whatever sender address is given in the SMTP transaction is
5196 often ignored for local senders - we use the actual sender, which is normally
5197 either the underlying user running this process or a -f argument provided by
5198 a trusted caller. It is saved in real_sender_address. The test for whether to
5199 accept the SMTP sender is encapsulated in receive_check_set_sender(). */
5204 if ((rc = smtp_setup_msg()) > 0)
5206 if (real_sender_address != NULL &&
5207 !receive_check_set_sender(sender_address))
5209 sender_address = raw_sender = real_sender_address;
5210 sender_address_unrewritten = NULL;
5213 /* For batched SMTP, we have to run the acl_not_smtp_start ACL, since it
5214 isn't really SMTP, so no other ACL will run until the acl_not_smtp one at
5215 the very end. The result of the ACL is ignored (as for other non-SMTP
5216 messages). It is run for its potential side effects. */
5218 if (smtp_batched_input && acl_not_smtp_start != NULL)
5220 uschar *user_msg, *log_msg;
5221 enable_dollar_recipients = TRUE;
5222 (void)acl_check(ACL_WHERE_NOTSMTP_START, NULL, acl_not_smtp_start,
5223 &user_msg, &log_msg);
5224 enable_dollar_recipients = FALSE;
5227 /* Now get the data for the message */
5229 more = receive_msg(extract_recipients);
5230 if (message_id[0] == 0)
5233 smtp_log_no_mail(); /* Log no mail if configured */
5234 exim_exit(EXIT_FAILURE);
5239 smtp_log_no_mail(); /* Log no mail if configured */
5240 exim_exit((rc == 0)? EXIT_SUCCESS : EXIT_FAILURE);
5244 /* In the non-SMTP case, we have all the information from the command
5245 line, but must process it in case it is in the more general RFC822
5246 format, and in any case, to detect syntax errors. Also, it appears that
5247 the use of comma-separated lists as single arguments is common, so we
5248 had better support them. */
5254 int count = argc - recipients_arg;
5255 uschar **list = argv + recipients_arg;
5257 /* These options cannot be changed dynamically for non-SMTP messages */
5259 active_local_sender_retain = local_sender_retain;
5260 active_local_from_check = local_from_check;
5262 /* Save before any rewriting */
5264 raw_sender = string_copy(sender_address);
5266 /* Loop for each argument */
5268 for (i = 0; i < count; i++)
5270 int start, end, domain;
5272 uschar *s = list[i];
5274 /* Loop for each comma-separated address */
5278 BOOL finished = FALSE;
5280 uschar *ss = parse_find_address_end(s, FALSE);
5282 if (*ss == ',') *ss = 0; else finished = TRUE;
5284 /* Check max recipients - if -t was used, these aren't recipients */
5286 if (recipients_max > 0 && ++rcount > recipients_max &&
5287 !extract_recipients)
5289 if (error_handling == ERRORS_STDERR)
5291 fprintf(stderr, "exim: too many recipients\n");
5292 exim_exit(EXIT_FAILURE);
5297 moan_to_sender(ERRMESS_TOOMANYRECIP, NULL, NULL, stdin, TRUE)?
5298 errors_sender_rc : EXIT_FAILURE;
5303 parse_extract_address(s, &errmess, &start, &end, &domain, FALSE);
5305 if (domain == 0 && !allow_unqualified_recipient)
5308 errmess = US"unqualified recipient address not allowed";
5311 if (recipient == NULL)
5313 if (error_handling == ERRORS_STDERR)
5315 fprintf(stderr, "exim: bad recipient address \"%s\": %s\n",
5316 string_printing(list[i]), errmess);
5317 exim_exit(EXIT_FAILURE);
5323 eblock.text1 = string_printing(list[i]);
5324 eblock.text2 = errmess;
5326 moan_to_sender(ERRMESS_BADARGADDRESS, &eblock, NULL, stdin, TRUE)?
5327 errors_sender_rc : EXIT_FAILURE;
5331 receive_add_recipient(recipient, -1);
5334 while (*(++s) != 0 && (*s == ',' || isspace(*s)));
5338 /* Show the recipients when debugging */
5343 if (sender_address != NULL) debug_printf("Sender: %s\n", sender_address);
5344 if (recipients_list != NULL)
5346 debug_printf("Recipients:\n");
5347 for (i = 0; i < recipients_count; i++)
5348 debug_printf(" %s\n", recipients_list[i].address);
5352 /* Run the acl_not_smtp_start ACL if required. The result of the ACL is
5353 ignored; rejecting here would just add complication, and it can just as
5354 well be done later. Allow $recipients to be visible in the ACL. */
5356 if (acl_not_smtp_start != NULL)
5358 uschar *user_msg, *log_msg;
5359 enable_dollar_recipients = TRUE;
5360 (void)acl_check(ACL_WHERE_NOTSMTP_START, NULL, acl_not_smtp_start,
5361 &user_msg, &log_msg);
5362 enable_dollar_recipients = FALSE;
5365 /* Read the data for the message. If filter_test is not FTEST_NONE, this
5366 will just read the headers for the message, and not write anything onto the
5369 message_ended = END_NOTENDED;
5370 more = receive_msg(extract_recipients);
5372 /* more is always FALSE here (not SMTP message) when reading a message
5373 for real; when reading the headers of a message for filter testing,
5374 it is TRUE if the headers were terminated by '.' and FALSE otherwise. */
5376 if (message_id[0] == 0) exim_exit(EXIT_FAILURE);
5377 } /* Non-SMTP message reception */
5379 /* If this is a filter testing run, there are headers in store, but
5380 no message on the spool. Run the filtering code in testing mode, setting
5381 the domain to the qualify domain and the local part to the current user,
5382 unless they have been set by options. The prefix and suffix are left unset
5383 unless specified. The the return path is set to to the sender unless it has
5384 already been set from a return-path header in the message. */
5386 if (filter_test != FTEST_NONE)
5388 deliver_domain = (ftest_domain != NULL)?
5389 ftest_domain : qualify_domain_recipient;
5390 deliver_domain_orig = deliver_domain;
5391 deliver_localpart = (ftest_localpart != NULL)?
5392 ftest_localpart : originator_login;
5393 deliver_localpart_orig = deliver_localpart;
5394 deliver_localpart_prefix = ftest_prefix;
5395 deliver_localpart_suffix = ftest_suffix;
5396 deliver_home = originator_home;
5398 if (return_path == NULL)
5400 printf("Return-path copied from sender\n");
5401 return_path = string_copy(sender_address);
5405 printf("Return-path = %s\n", (return_path[0] == 0)? US"<>" : return_path);
5407 printf("Sender = %s\n", (sender_address[0] == 0)? US"<>" : sender_address);
5409 receive_add_recipient(
5410 string_sprintf("%s%s%s@%s",
5411 (ftest_prefix == NULL)? US"" : ftest_prefix,
5413 (ftest_suffix == NULL)? US"" : ftest_suffix,
5414 deliver_domain), -1);
5416 printf("Recipient = %s\n", recipients_list[0].address);
5417 if (ftest_prefix != NULL) printf("Prefix = %s\n", ftest_prefix);
5418 if (ftest_suffix != NULL) printf("Suffix = %s\n", ftest_suffix);
5420 if (chdir("/")) /* Get away from wherever the user is running this from */
5422 DEBUG(D_receive) debug_printf("chdir(\"/\") failed\n");
5423 exim_exit(EXIT_FAILURE);
5426 /* Now we run either a system filter test, or a user filter test, or both.
5427 In the latter case, headers added by the system filter will persist and be
5428 available to the user filter. We need to copy the filter variables
5431 if ((filter_test & FTEST_SYSTEM) != 0)
5433 if (!filter_runtest(filter_sfd, filter_test_sfile, TRUE, more))
5434 exim_exit(EXIT_FAILURE);
5437 memcpy(filter_sn, filter_n, sizeof(filter_sn));
5439 if ((filter_test & FTEST_USER) != 0)
5441 if (!filter_runtest(filter_ufd, filter_test_ufile, FALSE, more))
5442 exim_exit(EXIT_FAILURE);
5445 exim_exit(EXIT_SUCCESS);
5448 /* Else act on the result of message reception. We should not get here unless
5449 message_id[0] is non-zero. If queue_only is set, session_local_queue_only
5450 will be TRUE. If it is not, check on the number of messages received in this
5453 if (!session_local_queue_only &&
5454 smtp_accept_queue_per_connection > 0 &&
5455 receive_messagecount > smtp_accept_queue_per_connection)
5457 session_local_queue_only = TRUE;
5458 queue_only_reason = 2;
5461 /* Initialize local_queue_only from session_local_queue_only. If it is false,
5462 and queue_only_load is set, check that the load average is below it. If it is
5463 not, set local_queue_only TRUE. If queue_only_load_latch is true (the
5464 default), we put the whole session into queue_only mode. It then remains this
5465 way for any subsequent messages on the same SMTP connection. This is a
5466 deliberate choice; even though the load average may fall, it doesn't seem
5467 right to deliver later messages on the same call when not delivering earlier
5468 ones. However, there are odd cases where this is not wanted, so this can be
5469 changed by setting queue_only_load_latch false. */
5471 local_queue_only = session_local_queue_only;
5472 if (!local_queue_only && queue_only_load >= 0)
5474 local_queue_only = (load_average = OS_GETLOADAVG()) > queue_only_load;
5475 if (local_queue_only)
5477 queue_only_reason = 3;
5478 if (queue_only_load_latch) session_local_queue_only = TRUE;
5482 /* If running as an MUA wrapper, all queueing options and freezing options
5486 local_queue_only = queue_only_policy = deliver_freeze = FALSE;
5488 /* Log the queueing here, when it will get a message id attached, but
5489 not if queue_only is set (case 0). Case 1 doesn't happen here (too many
5492 if (local_queue_only) switch(queue_only_reason)
5495 log_write(L_delay_delivery,
5496 LOG_MAIN, "no immediate delivery: more than %d messages "
5497 "received in one connection", smtp_accept_queue_per_connection);
5501 log_write(L_delay_delivery,
5502 LOG_MAIN, "no immediate delivery: load average %.2f",
5503 (double)load_average/1000.0);
5507 /* Else do the delivery unless the ACL or local_scan() called for queue only
5508 or froze the message. Always deliver in a separate process. A fork failure is
5509 not a disaster, as the delivery will eventually happen on a subsequent queue
5510 run. The search cache must be tidied before the fork, as the parent will
5511 do it before exiting. The child will trigger a lookup failure and
5512 thereby defer the delivery if it tries to use (for example) a cached ldap
5513 connection that the parent has called unbind on. */
5515 else if (!queue_only_policy && !deliver_freeze)
5520 if ((pid = fork()) == 0)
5523 close_unwanted(); /* Close unwanted file descriptors and TLS */
5524 exim_nullstd(); /* Ensure std{in,out,err} exist */
5526 /* Re-exec Exim if we need to regain privilege (note: in mua_wrapper
5527 mode, deliver_drop_privilege is forced TRUE). */
5529 if (geteuid() != root_uid && !deliver_drop_privilege && !unprivileged)
5531 (void)child_exec_exim(CEE_EXEC_EXIT, FALSE, NULL, FALSE, 2, US"-Mc",
5533 /* Control does not return here. */
5536 /* No need to re-exec */
5538 rc = deliver_message(message_id, FALSE, FALSE);
5540 _exit((!mua_wrapper || rc == DELIVER_MUA_SUCCEEDED)?
5541 EXIT_SUCCESS : EXIT_FAILURE);
5546 log_write(0, LOG_MAIN|LOG_PANIC, "failed to fork automatic delivery "
5547 "process: %s", strerror(errno));
5550 /* In the parent, wait if synchronous delivery is required. This will
5551 always be the case in MUA wrapper mode. */
5553 else if (synchronous_delivery)
5556 while (wait(&status) != pid);
5557 if ((status & 0x00ff) != 0)
5558 log_write(0, LOG_MAIN|LOG_PANIC,
5559 "process %d crashed with signal %d while delivering %s",
5560 (int)pid, status & 0x00ff, message_id);
5561 if (mua_wrapper && (status & 0xffff) != 0) exim_exit(EXIT_FAILURE);
5565 /* The loop will repeat if more is TRUE. If we do not know know that the OS
5566 automatically reaps children (see comments above the loop), clear away any
5567 finished subprocesses here, in case there are lots of messages coming in
5568 from the same source. */
5570 #ifndef SIG_IGN_WORKS
5571 while (waitpid(-1, NULL, WNOHANG) > 0);
5575 exim_exit(EXIT_SUCCESS); /* Never returns */
5576 return 0; /* To stop compiler warning */