1 /*************************************************
2 * Exim - an Internet mail transport agent *
3 *************************************************/
5 /* Copyright (c) University of Cambridge 1995 - 2012 */
6 /* See the file NOTICE for conditions of use and distribution. */
9 /* The main function: entry point, initialization, and high-level control.
10 Also a few functions that don't naturally fit elsewhere. */
15 extern void init_lookup_list(void);
19 /*************************************************
20 * Function interface to store functions *
21 *************************************************/
23 /* We need some real functions to pass to the PCRE regular expression library
24 for store allocation via Exim's store manager. The normal calls are actually
25 macros that pass over location information to make tracing easier. These
26 functions just interface to the standard macro calls. A good compiler will
27 optimize out the tail recursion and so not make them too expensive. There
28 are two sets of functions; one for use when we want to retain the compiled
29 regular expression for a long time; the other for short-term use. */
32 function_store_get(size_t size)
34 return store_get((int)size);
38 function_dummy_free(void *block) { block = block; }
41 function_store_malloc(size_t size)
43 return store_malloc((int)size);
47 function_store_free(void *block)
55 /*************************************************
56 * Enums for cmdline interface *
57 *************************************************/
59 enum commandline_info { CMDINFO_NONE=0,
60 CMDINFO_HELP, CMDINFO_SIEVE, CMDINFO_DSCP };
65 /*************************************************
66 * Compile regular expression and panic on fail *
67 *************************************************/
69 /* This function is called when failure to compile a regular expression leads
70 to a panic exit. In other cases, pcre_compile() is called directly. In many
71 cases where this function is used, the results of the compilation are to be
72 placed in long-lived store, so we temporarily reset the store management
73 functions that PCRE uses if the use_malloc flag is set.
76 pattern the pattern to compile
77 caseless TRUE if caseless matching is required
78 use_malloc TRUE if compile into malloc store
80 Returns: pointer to the compiled pattern
84 regex_must_compile(uschar *pattern, BOOL caseless, BOOL use_malloc)
87 int options = PCRE_COPT;
92 pcre_malloc = function_store_malloc;
93 pcre_free = function_store_free;
95 if (caseless) options |= PCRE_CASELESS;
96 yield = pcre_compile(CS pattern, options, (const char **)&error, &offset, NULL);
97 pcre_malloc = function_store_get;
98 pcre_free = function_dummy_free;
100 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "regular expression error: "
101 "%s at offset %d while compiling %s", error, offset, pattern);
108 /*************************************************
109 * Execute regular expression and set strings *
110 *************************************************/
112 /* This function runs a regular expression match, and sets up the pointers to
113 the matched substrings.
116 re the compiled expression
117 subject the subject string
118 options additional PCRE options
119 setup if < 0 do full setup
120 if >= 0 setup from setup+1 onwards,
121 excluding the full matched string
123 Returns: TRUE or FALSE
127 regex_match_and_setup(const pcre *re, uschar *subject, int options, int setup)
129 int ovector[3*(EXPAND_MAXN+1)];
130 int n = pcre_exec(re, NULL, CS subject, Ustrlen(subject), 0,
131 PCRE_EOPT | options, ovector, sizeof(ovector)/sizeof(int));
133 if (n == 0) n = EXPAND_MAXN + 1;
137 expand_nmax = (setup < 0)? 0 : setup + 1;
138 for (nn = (setup < 0)? 0 : 2; nn < n*2; nn += 2)
140 expand_nstring[expand_nmax] = subject + ovector[nn];
141 expand_nlength[expand_nmax++] = ovector[nn+1] - ovector[nn];
151 /*************************************************
152 * Set up processing details *
153 *************************************************/
155 /* Save a text string for dumping when SIGUSR1 is received.
156 Do checks for overruns.
158 Arguments: format and arguments, as for printf()
163 set_process_info(const char *format, ...)
167 sprintf(CS process_info, "%5d ", (int)getpid());
168 len = Ustrlen(process_info);
169 va_start(ap, format);
170 if (!string_vformat(process_info + len, PROCESS_INFO_SIZE - len - 2, format, ap))
171 Ustrcpy(process_info + len, "**** string overflowed buffer ****");
172 len = Ustrlen(process_info);
173 process_info[len+0] = '\n';
174 process_info[len+1] = '\0';
175 process_info_len = len + 1;
176 DEBUG(D_process_info) debug_printf("set_process_info: %s", process_info);
183 /*************************************************
184 * Handler for SIGUSR1 *
185 *************************************************/
187 /* SIGUSR1 causes any exim process to write to the process log details of
188 what it is currently doing. It will only be used if the OS is capable of
189 setting up a handler that causes automatic restarting of any system call
190 that is in progress at the time.
192 This function takes care to be signal-safe.
194 Argument: the signal number (SIGUSR1)
199 usr1_handler(int sig)
203 os_restarting_signal(sig, usr1_handler);
205 fd = Uopen(process_log_path, O_APPEND|O_WRONLY, LOG_MODE);
208 /* If we are already running as the Exim user, try to create it in the
209 current process (assuming spool_directory exists). Otherwise, if we are
210 root, do the creation in an exim:exim subprocess. */
212 int euid = geteuid();
213 if (euid == exim_uid)
214 fd = Uopen(process_log_path, O_CREAT|O_APPEND|O_WRONLY, LOG_MODE);
215 else if (euid == root_uid)
216 fd = log_create_as_exim(process_log_path);
219 /* If we are neither exim nor root, or if we failed to create the log file,
220 give up. There is not much useful we can do with errors, since we don't want
221 to disrupt whatever is going on outside the signal handler. */
225 {int dummy = write(fd, process_info, process_info_len); dummy = dummy; }
231 /*************************************************
233 *************************************************/
235 /* This handler is enabled most of the time that Exim is running. The handler
236 doesn't actually get used unless alarm() has been called to set a timer, to
237 place a time limit on a system call of some kind. When the handler is run, it
240 There are some other SIGALRM handlers that are used in special cases when more
241 than just a flag setting is required; for example, when reading a message's
242 input. These are normally set up in the code module that uses them, and the
243 SIGALRM handler is reset to this one afterwards.
245 Argument: the signal value (SIGALRM)
250 sigalrm_handler(int sig)
252 sig = sig; /* Keep picky compilers happy */
254 os_non_restarting_signal(SIGALRM, sigalrm_handler);
259 /*************************************************
260 * Sleep for a fractional time interval *
261 *************************************************/
263 /* This function is called by millisleep() and exim_wait_tick() to wait for a
264 period of time that may include a fraction of a second. The coding is somewhat
265 tedious. We do not expect setitimer() ever to fail, but if it does, the process
266 will wait for ever, so we panic in this instance. (There was a case of this
267 when a bug in a function that calls milliwait() caused it to pass invalid data.
268 That's when I added the check. :-)
270 Argument: an itimerval structure containing the interval
275 milliwait(struct itimerval *itval)
278 sigset_t old_sigmask;
279 (void)sigemptyset(&sigmask); /* Empty mask */
280 (void)sigaddset(&sigmask, SIGALRM); /* Add SIGALRM */
281 (void)sigprocmask(SIG_BLOCK, &sigmask, &old_sigmask); /* Block SIGALRM */
282 if (setitimer(ITIMER_REAL, itval, NULL) < 0) /* Start timer */
283 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
284 "setitimer() failed: %s", strerror(errno));
285 (void)sigfillset(&sigmask); /* All signals */
286 (void)sigdelset(&sigmask, SIGALRM); /* Remove SIGALRM */
287 (void)sigsuspend(&sigmask); /* Until SIGALRM */
288 (void)sigprocmask(SIG_SETMASK, &old_sigmask, NULL); /* Restore mask */
294 /*************************************************
295 * Millisecond sleep function *
296 *************************************************/
298 /* The basic sleep() function has a granularity of 1 second, which is too rough
299 in some cases - for example, when using an increasing delay to slow down
302 Argument: number of millseconds
309 struct itimerval itval;
310 itval.it_interval.tv_sec = 0;
311 itval.it_interval.tv_usec = 0;
312 itval.it_value.tv_sec = msec/1000;
313 itval.it_value.tv_usec = (msec % 1000) * 1000;
319 /*************************************************
320 * Compare microsecond times *
321 *************************************************/
328 Returns: -1, 0, or +1
332 exim_tvcmp(struct timeval *t1, struct timeval *t2)
334 if (t1->tv_sec > t2->tv_sec) return +1;
335 if (t1->tv_sec < t2->tv_sec) return -1;
336 if (t1->tv_usec > t2->tv_usec) return +1;
337 if (t1->tv_usec < t2->tv_usec) return -1;
344 /*************************************************
345 * Clock tick wait function *
346 *************************************************/
348 /* Exim uses a time + a pid to generate a unique identifier in two places: its
349 message IDs, and in file names for maildir deliveries. Because some OS now
350 re-use pids within the same second, sub-second times are now being used.
351 However, for absolute certaintly, we must ensure the clock has ticked before
352 allowing the relevant process to complete. At the time of implementation of
353 this code (February 2003), the speed of processors is such that the clock will
354 invariably have ticked already by the time a process has done its job. This
355 function prepares for the time when things are faster - and it also copes with
356 clocks that go backwards.
359 then_tv A timeval which was used to create uniqueness; its usec field
360 has been rounded down to the value of the resolution.
361 We want to be sure the current time is greater than this.
362 resolution The resolution that was used to divide the microseconds
363 (1 for maildir, larger for message ids)
369 exim_wait_tick(struct timeval *then_tv, int resolution)
371 struct timeval now_tv;
372 long int now_true_usec;
374 (void)gettimeofday(&now_tv, NULL);
375 now_true_usec = now_tv.tv_usec;
376 now_tv.tv_usec = (now_true_usec/resolution) * resolution;
378 if (exim_tvcmp(&now_tv, then_tv) <= 0)
380 struct itimerval itval;
381 itval.it_interval.tv_sec = 0;
382 itval.it_interval.tv_usec = 0;
383 itval.it_value.tv_sec = then_tv->tv_sec - now_tv.tv_sec;
384 itval.it_value.tv_usec = then_tv->tv_usec + resolution - now_true_usec;
386 /* We know that, overall, "now" is less than or equal to "then". Therefore, a
387 negative value for the microseconds is possible only in the case when "now"
388 is more than a second less than "then". That means that itval.it_value.tv_sec
389 is greater than zero. The following correction is therefore safe. */
391 if (itval.it_value.tv_usec < 0)
393 itval.it_value.tv_usec += 1000000;
394 itval.it_value.tv_sec -= 1;
397 DEBUG(D_transport|D_receive)
399 if (!running_in_test_harness)
401 debug_printf("tick check: %lu.%06lu %lu.%06lu\n",
402 then_tv->tv_sec, then_tv->tv_usec, now_tv.tv_sec, now_tv.tv_usec);
403 debug_printf("waiting %lu.%06lu\n", itval.it_value.tv_sec,
404 itval.it_value.tv_usec);
415 /*************************************************
416 * Call fopen() with umask 777 and adjust mode *
417 *************************************************/
419 /* Exim runs with umask(0) so that files created with open() have the mode that
420 is specified in the open() call. However, there are some files, typically in
421 the spool directory, that are created with fopen(). They end up world-writeable
422 if no precautions are taken. Although the spool directory is not accessible to
423 the world, this is an untidiness. So this is a wrapper function for fopen()
424 that sorts out the mode of the created file.
427 filename the file name
428 options the fopen() options
429 mode the required mode
431 Returns: the fopened FILE or NULL
435 modefopen(const uschar *filename, const char *options, mode_t mode)
437 mode_t saved_umask = umask(0777);
438 FILE *f = Ufopen(filename, options);
439 (void)umask(saved_umask);
440 if (f != NULL) (void)fchmod(fileno(f), mode);
447 /*************************************************
448 * Ensure stdin, stdout, and stderr exist *
449 *************************************************/
451 /* Some operating systems grumble if an exec() happens without a standard
452 input, output, and error (fds 0, 1, 2) being defined. The worry is that some
453 file will be opened and will use these fd values, and then some other bit of
454 code will assume, for example, that it can write error messages to stderr.
455 This function ensures that fds 0, 1, and 2 are open if they do not already
456 exist, by connecting them to /dev/null.
458 This function is also used to ensure that std{in,out,err} exist at all times,
459 so that if any library that Exim calls tries to use them, it doesn't crash.
471 for (i = 0; i <= 2; i++)
473 if (fstat(i, &statbuf) < 0 && errno == EBADF)
475 if (devnull < 0) devnull = open("/dev/null", O_RDWR);
476 if (devnull < 0) log_write(0, LOG_MAIN|LOG_PANIC_DIE, "%s",
477 string_open_failed(errno, "/dev/null"));
478 if (devnull != i) (void)dup2(devnull, i);
481 if (devnull > 2) (void)close(devnull);
487 /*************************************************
488 * Close unwanted file descriptors for delivery *
489 *************************************************/
491 /* This function is called from a new process that has been forked to deliver
492 an incoming message, either directly, or using exec.
494 We want any smtp input streams to be closed in this new process. However, it
495 has been observed that using fclose() here causes trouble. When reading in -bS
496 input, duplicate copies of messages have been seen. The files will be sharing a
497 file pointer with the parent process, and it seems that fclose() (at least on
498 some systems - I saw this on Solaris 2.5.1) messes with that file pointer, at
499 least sometimes. Hence we go for closing the underlying file descriptors.
501 If TLS is active, we want to shut down the TLS library, but without molesting
502 the parent's SSL connection.
504 For delivery of a non-SMTP message, we want to close stdin and stdout (and
505 stderr unless debugging) because the calling process might have set them up as
506 pipes and be waiting for them to close before it waits for the submission
507 process to terminate. If they aren't closed, they hold up the calling process
508 until the initial delivery process finishes, which is not what we want.
510 Exception: We do want it for synchronous delivery!
512 And notwithstanding all the above, if D_resolver is set, implying resolver
513 debugging, leave stdout open, because that's where the resolver writes its
516 When we close stderr (which implies we've also closed stdout), we also get rid
517 of any controlling terminal.
529 tls_close(FALSE, FALSE); /* Shut down the TLS library */
531 (void)close(fileno(smtp_in));
532 (void)close(fileno(smtp_out));
537 (void)close(0); /* stdin */
538 if ((debug_selector & D_resolver) == 0) (void)close(1); /* stdout */
539 if (debug_selector == 0) /* stderr */
541 if (!synchronous_delivery)
554 /*************************************************
556 *************************************************/
558 /* This function sets a new uid and gid permanently, optionally calling
559 initgroups() to set auxiliary groups. There are some special cases when running
560 Exim in unprivileged modes. In these situations the effective uid will not be
561 root; if we already have the right effective uid/gid, and don't need to
562 initialize any groups, leave things as they are.
567 igflag TRUE if initgroups() wanted
568 msg text to use in debugging output and failure log
570 Returns: nothing; bombs out on failure
574 exim_setugid(uid_t uid, gid_t gid, BOOL igflag, uschar *msg)
576 uid_t euid = geteuid();
577 gid_t egid = getegid();
579 if (euid == root_uid || euid != uid || egid != gid || igflag)
581 /* At least one OS returns +1 for initgroups failure, so just check for
586 struct passwd *pw = getpwuid(uid);
589 if (initgroups(pw->pw_name, gid) != 0)
590 log_write(0,LOG_MAIN|LOG_PANIC_DIE,"initgroups failed for uid=%ld: %s",
591 (long int)uid, strerror(errno));
593 else log_write(0, LOG_MAIN|LOG_PANIC_DIE, "cannot run initgroups(): "
594 "no passwd entry for uid=%ld", (long int)uid);
597 if (setgid(gid) < 0 || setuid(uid) < 0)
599 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "unable to set gid=%ld or uid=%ld "
600 "(euid=%ld): %s", (long int)gid, (long int)uid, (long int)euid, msg);
604 /* Debugging output included uid/gid and all groups */
608 int group_count, save_errno;
609 gid_t group_list[NGROUPS_MAX];
610 debug_printf("changed uid/gid: %s\n uid=%ld gid=%ld pid=%ld\n", msg,
611 (long int)geteuid(), (long int)getegid(), (long int)getpid());
612 group_count = getgroups(NGROUPS_MAX, group_list);
614 debug_printf(" auxiliary group list:");
618 for (i = 0; i < group_count; i++) debug_printf(" %d", (int)group_list[i]);
620 else if (group_count < 0)
621 debug_printf(" <error: %s>", strerror(save_errno));
622 else debug_printf(" <none>");
630 /*************************************************
632 *************************************************/
634 /* Exim exits via this function so that it always clears up any open
640 Returns: does not return
648 debug_printf(">>>>>>>>>>>>>>>> Exim pid=%d terminating with rc=%d "
649 ">>>>>>>>>>>>>>>>\n", (int)getpid(), rc);
656 /*************************************************
657 * Extract port from host address *
658 *************************************************/
660 /* Called to extract the port from the values given to -oMa and -oMi.
661 It also checks the syntax of the address, and terminates it before the
662 port data when a port is extracted.
665 address the address, with possible port on the end
667 Returns: the port, or zero if there isn't one
668 bombs out on a syntax error
672 check_port(uschar *address)
674 int port = host_address_extract_port(address);
675 if (string_is_ip_address(address, NULL) == 0)
677 fprintf(stderr, "exim abandoned: \"%s\" is not an IP address\n", address);
685 /*************************************************
686 * Test/verify an address *
687 *************************************************/
689 /* This function is called by the -bv and -bt code. It extracts a working
690 address from a full RFC 822 address. This isn't really necessary per se, but it
691 has the effect of collapsing source routes.
695 flags flag bits for verify_address()
696 exit_value to be set for failures
702 test_address(uschar *s, int flags, int *exit_value)
704 int start, end, domain;
705 uschar *parse_error = NULL;
706 uschar *address = parse_extract_address(s, &parse_error, &start, &end, &domain,
710 fprintf(stdout, "syntax error: %s\n", parse_error);
715 int rc = verify_address(deliver_make_addr(address,TRUE), stdout, flags, -1,
716 -1, -1, NULL, NULL, NULL);
717 if (rc == FAIL) *exit_value = 2;
718 else if (rc == DEFER && *exit_value == 0) *exit_value = 1;
724 /*************************************************
725 * Show supported features *
726 *************************************************/
728 /* This function is called for -bV/--version and for -d to output the optional
729 features of the current Exim binary.
731 Arguments: a FILE for printing
736 show_whats_supported(FILE *f)
740 #ifdef DB_VERSION_STRING
741 fprintf(f, "Berkeley DB: %s\n", DB_VERSION_STRING);
742 #elif defined(BTREEVERSION) && defined(HASHVERSION)
744 fprintf(f, "Probably Berkeley DB version 1.8x (native mode)\n");
746 fprintf(f, "Probably Berkeley DB version 1.8x (compatibility mode)\n");
748 #elif defined(_DBM_RDONLY) || defined(dbm_dirfno)
749 fprintf(f, "Probably ndbm\n");
750 #elif defined(USE_TDB)
751 fprintf(f, "Using tdb\n");
754 fprintf(f, "Probably GDBM (native mode)\n");
756 fprintf(f, "Probably GDBM (compatibility mode)\n");
760 fprintf(f, "Support for:");
761 #ifdef SUPPORT_CRYPTEQ
762 fprintf(f, " crypteq");
765 fprintf(f, " iconv()");
770 #ifdef HAVE_SETCLASSRESOURCES
771 fprintf(f, " use_setclassresources");
780 fprintf(f, " Expand_dlfunc");
782 #ifdef USE_TCP_WRAPPERS
783 fprintf(f, " TCPwrappers");
787 fprintf(f, " GnuTLS");
789 fprintf(f, " OpenSSL");
792 #ifdef SUPPORT_TRANSLATE_IP_ADDRESS
793 fprintf(f, " translate_ip_address");
795 #ifdef SUPPORT_MOVE_FROZEN_MESSAGES
796 fprintf(f, " move_frozen_messages");
798 #ifdef WITH_CONTENT_SCAN
799 fprintf(f, " Content_Scanning");
804 #ifdef WITH_OLD_DEMIME
805 fprintf(f, " Old_Demime");
807 #ifdef EXPERIMENTAL_SPF
808 fprintf(f, " Experimental_SPF");
810 #ifdef EXPERIMENTAL_SRS
811 fprintf(f, " Experimental_SRS");
813 #ifdef EXPERIMENTAL_BRIGHTMAIL
814 fprintf(f, " Experimental_Brightmail");
816 #ifdef EXPERIMENTAL_DCC
817 fprintf(f, " Experimental_DCC");
819 #ifdef EXPERIMENTAL_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_DBL
829 fprintf(f, " Experimental_DBL");
833 fprintf(f, "Lookups (built-in):");
834 #if defined(LOOKUP_LSEARCH) && LOOKUP_LSEARCH!=2
835 fprintf(f, " lsearch wildlsearch nwildlsearch iplsearch");
837 #if defined(LOOKUP_CDB) && LOOKUP_CDB!=2
840 #if defined(LOOKUP_DBM) && LOOKUP_DBM!=2
841 fprintf(f, " dbm dbmjz dbmnz");
843 #if defined(LOOKUP_DNSDB) && LOOKUP_DNSDB!=2
844 fprintf(f, " dnsdb");
846 #if defined(LOOKUP_DSEARCH) && LOOKUP_DSEARCH!=2
847 fprintf(f, " dsearch");
849 #if defined(LOOKUP_IBASE) && LOOKUP_IBASE!=2
850 fprintf(f, " ibase");
852 #if defined(LOOKUP_LDAP) && LOOKUP_LDAP!=2
853 fprintf(f, " ldap ldapdn ldapm");
855 #if defined(LOOKUP_MYSQL) && LOOKUP_MYSQL!=2
856 fprintf(f, " mysql");
858 #if defined(LOOKUP_NIS) && LOOKUP_NIS!=2
859 fprintf(f, " nis nis0");
861 #if defined(LOOKUP_NISPLUS) && LOOKUP_NISPLUS!=2
862 fprintf(f, " nisplus");
864 #if defined(LOOKUP_ORACLE) && LOOKUP_ORACLE!=2
865 fprintf(f, " oracle");
867 #if defined(LOOKUP_PASSWD) && LOOKUP_PASSWD!=2
868 fprintf(f, " passwd");
870 #if defined(LOOKUP_PGSQL) && LOOKUP_PGSQL!=2
871 fprintf(f, " pgsql");
873 #if defined(LOOKUP_SQLITE) && LOOKUP_SQLITE!=2
874 fprintf(f, " sqlite");
876 #if defined(LOOKUP_TESTDB) && LOOKUP_TESTDB!=2
877 fprintf(f, " testdb");
879 #if defined(LOOKUP_WHOSON) && LOOKUP_WHOSON!=2
880 fprintf(f, " whoson");
884 fprintf(f, "Authenticators:");
886 fprintf(f, " cram_md5");
888 #ifdef AUTH_CYRUS_SASL
889 fprintf(f, " cyrus_sasl");
892 fprintf(f, " dovecot");
895 fprintf(f, " gsasl");
897 #ifdef AUTH_HEIMDAL_GSSAPI
898 fprintf(f, " heimdal_gssapi");
900 #ifdef AUTH_PLAINTEXT
901 fprintf(f, " plaintext");
908 fprintf(f, "Routers:");
910 fprintf(f, " accept");
912 #ifdef ROUTER_DNSLOOKUP
913 fprintf(f, " dnslookup");
915 #ifdef ROUTER_IPLITERAL
916 fprintf(f, " ipliteral");
918 #ifdef ROUTER_IPLOOKUP
919 fprintf(f, " iplookup");
921 #ifdef ROUTER_MANUALROUTE
922 fprintf(f, " manualroute");
924 #ifdef ROUTER_QUERYPROGRAM
925 fprintf(f, " queryprogram");
927 #ifdef ROUTER_REDIRECT
928 fprintf(f, " redirect");
932 fprintf(f, "Transports:");
933 #ifdef TRANSPORT_APPENDFILE
934 fprintf(f, " appendfile");
935 #ifdef SUPPORT_MAILDIR
936 fprintf(f, "/maildir");
938 #ifdef SUPPORT_MAILSTORE
939 fprintf(f, "/mailstore");
945 #ifdef TRANSPORT_AUTOREPLY
946 fprintf(f, " autoreply");
948 #ifdef TRANSPORT_LMTP
951 #ifdef TRANSPORT_PIPE
954 #ifdef TRANSPORT_SMTP
959 if (fixed_never_users[0] > 0)
962 fprintf(f, "Fixed never_users: ");
963 for (i = 1; i <= (int)fixed_never_users[0] - 1; i++)
964 fprintf(f, "%d:", (unsigned int)fixed_never_users[i]);
965 fprintf(f, "%d\n", (unsigned int)fixed_never_users[i]);
968 fprintf(f, "Size of off_t: " SIZE_T_FMT "\n", sizeof(off_t));
970 /* Everything else is details which are only worth reporting when debugging.
971 Perhaps the tls_version_report should move into this too. */
976 /* clang defines __GNUC__ (at least, for me) so test for it first */
977 #if defined(__clang__)
978 fprintf(f, "Compiler: CLang [%s]\n", __clang_version__);
979 #elif defined(__GNUC__)
980 fprintf(f, "Compiler: GCC [%s]\n",
984 "? unknown version ?"
988 fprintf(f, "Compiler: <unknown>\n");
992 tls_version_report(f);
995 for (authi = auths_available; *authi->driver_name != '\0'; ++authi) {
996 if (authi->version_report) {
997 (*authi->version_report)(f);
1001 /* PCRE_PRERELEASE is either defined and empty or a bare sequence of
1002 characters; unless it's an ancient version of PCRE in which case it
1004 #ifndef PCRE_PRERELEASE
1005 #define PCRE_PRERELEASE
1008 #define EXPAND_AND_QUOTE(X) QUOTE(X)
1009 fprintf(f, "Library version: PCRE: Compile: %d.%d%s\n"
1011 PCRE_MAJOR, PCRE_MINOR,
1012 EXPAND_AND_QUOTE(PCRE_PRERELEASE) "",
1015 #undef EXPAND_AND_QUOTE
1018 for (i = 0; i < lookup_list_count; i++)
1020 if (lookup_list[i]->version_report)
1021 lookup_list[i]->version_report(f);
1024 #ifdef WHITELIST_D_MACROS
1025 fprintf(f, "WHITELIST_D_MACROS: \"%s\"\n", WHITELIST_D_MACROS);
1027 fprintf(f, "WHITELIST_D_MACROS unset\n");
1029 #ifdef TRUSTED_CONFIG_LIST
1030 fprintf(f, "TRUSTED_CONFIG_LIST: \"%s\"\n", TRUSTED_CONFIG_LIST);
1032 fprintf(f, "TRUSTED_CONFIG_LIST unset\n");
1039 /*************************************************
1040 * Show auxiliary information about Exim *
1041 *************************************************/
1044 show_exim_information(enum commandline_info request, FILE *stream)
1051 fprintf(stream, "Oops, something went wrong.\n");
1055 "The -bI: flag takes a string indicating which information to provide.\n"
1056 "If the string is not recognised, you'll get this help (on stderr).\n"
1058 " exim -bI:help this information\n"
1059 " exim -bI:dscp dscp value keywords known\n"
1060 " exim -bI:sieve list of supported sieve extensions, one per line.\n"
1064 for (pp = exim_sieve_extension_list; *pp; ++pp)
1065 fprintf(stream, "%s\n", *pp);
1068 dscp_list_to_stream(stream);
1074 /*************************************************
1075 * Quote a local part *
1076 *************************************************/
1078 /* This function is used when a sender address or a From: or Sender: header
1079 line is being created from the caller's login, or from an authenticated_id. It
1080 applies appropriate quoting rules for a local part.
1082 Argument: the local part
1083 Returns: the local part, quoted if necessary
1087 local_part_quote(uschar *lpart)
1089 BOOL needs_quote = FALSE;
1094 for (t = lpart; !needs_quote && *t != 0; t++)
1096 needs_quote = !isalnum(*t) && strchr("!#$%&'*+-/=?^_`{|}~", *t) == NULL &&
1097 (*t != '.' || t == lpart || t[1] == 0);
1100 if (!needs_quote) return lpart;
1103 yield = string_cat(NULL, &size, &ptr, US"\"", 1);
1107 uschar *nq = US Ustrpbrk(lpart, "\\\"");
1110 yield = string_cat(yield, &size, &ptr, lpart, Ustrlen(lpart));
1113 yield = string_cat(yield, &size, &ptr, lpart, nq - lpart);
1114 yield = string_cat(yield, &size, &ptr, US"\\", 1);
1115 yield = string_cat(yield, &size, &ptr, nq, 1);
1119 yield = string_cat(yield, &size, &ptr, US"\"", 1);
1127 /*************************************************
1128 * Load readline() functions *
1129 *************************************************/
1131 /* This function is called from testing executions that read data from stdin,
1132 but only when running as the calling user. Currently, only -be does this. The
1133 function loads the readline() function library and passes back the functions.
1134 On some systems, it needs the curses library, so load that too, but try without
1135 it if loading fails. All this functionality has to be requested at build time.
1138 fn_readline_ptr pointer to where to put the readline pointer
1139 fn_addhist_ptr pointer to where to put the addhistory function
1141 Returns: the dlopen handle or NULL on failure
1145 set_readline(char * (**fn_readline_ptr)(const char *),
1146 void (**fn_addhist_ptr)(const char *))
1149 void *dlhandle_curses = dlopen("libcurses." DYNLIB_FN_EXT, RTLD_GLOBAL|RTLD_LAZY);
1151 dlhandle = dlopen("libreadline." DYNLIB_FN_EXT, RTLD_GLOBAL|RTLD_NOW);
1152 if (dlhandle_curses != NULL) dlclose(dlhandle_curses);
1154 if (dlhandle != NULL)
1156 /* Checked manual pages; at least in GNU Readline 6.1, the prototypes are:
1157 * char * readline (const char *prompt);
1158 * void add_history (const char *string);
1160 *fn_readline_ptr = (char *(*)(const char*))dlsym(dlhandle, "readline");
1161 *fn_addhist_ptr = (void(*)(const char*))dlsym(dlhandle, "add_history");
1165 DEBUG(D_any) debug_printf("failed to load readline: %s\n", dlerror());
1174 /*************************************************
1175 * Get a line from stdin for testing things *
1176 *************************************************/
1178 /* This function is called when running tests that can take a number of lines
1179 of input (for example, -be and -bt). It handles continuations and trailing
1180 spaces. And prompting and a blank line output on eof. If readline() is in use,
1181 the arguments are non-NULL and provide the relevant functions.
1184 fn_readline readline function or NULL
1185 fn_addhist addhist function or NULL
1187 Returns: pointer to dynamic memory, or NULL at end of file
1191 get_stdinput(char *(*fn_readline)(const char *), void(*fn_addhist)(const char *))
1196 uschar *yield = NULL;
1198 if (fn_readline == NULL) { printf("> "); fflush(stdout); }
1202 uschar buffer[1024];
1206 char *readline_line = NULL;
1207 if (fn_readline != NULL)
1209 if ((readline_line = fn_readline((i > 0)? "":"> ")) == NULL) break;
1210 if (*readline_line != 0 && fn_addhist != NULL) fn_addhist(readline_line);
1211 p = US readline_line;
1216 /* readline() not in use */
1219 if (Ufgets(buffer, sizeof(buffer), stdin) == NULL) break;
1223 /* Handle the line */
1225 ss = p + (int)Ustrlen(p);
1226 while (ss > p && isspace(ss[-1])) ss--;
1230 while (p < ss && isspace(*p)) p++; /* leading space after cont */
1233 yield = string_cat(yield, &size, &ptr, p, ss - p);
1236 if (fn_readline != NULL) free(readline_line);
1239 if (ss == p || yield[ptr-1] != '\\')
1247 if (yield == NULL) printf("\n");
1253 /*************************************************
1254 * Output usage information for the program *
1255 *************************************************/
1257 /* This function is called when there are no recipients
1258 or a specific --help argument was added.
1261 progname information on what name we were called by
1263 Returns: DOES NOT RETURN
1267 exim_usage(uschar *progname)
1270 /* Handle specific program invocation varients */
1271 if (Ustrcmp(progname, US"-mailq") == 0)
1274 "mailq - list the contents of the mail queue\n\n"
1275 "For a list of options, see the Exim documentation.\n");
1279 /* Generic usage - we output this whatever happens */
1281 "Exim is a Mail Transfer Agent. It is normally called by Mail User Agents,\n"
1282 "not directly from a shell command line. Options and/or arguments control\n"
1283 "what it does when called. For a list of options, see the Exim documentation.\n");
1290 /*************************************************
1291 * Validate that the macros given are okay *
1292 *************************************************/
1294 /* Typically, Exim will drop privileges if macros are supplied. In some
1295 cases, we want to not do so.
1297 Arguments: none (macros is a global)
1298 Returns: true if trusted, false otherwise
1302 macros_trusted(void)
1304 #ifdef WHITELIST_D_MACROS
1306 uschar *whitelisted, *end, *p, **whites, **w;
1307 int white_count, i, n;
1309 BOOL prev_char_item, found;
1314 #ifndef WHITELIST_D_MACROS
1318 /* We only trust -D overrides for some invoking users:
1319 root, the exim run-time user, the optional config owner user.
1320 I don't know why config-owner would be needed, but since they can own the
1321 config files anyway, there's no security risk to letting them override -D. */
1322 if ( ! ((real_uid == root_uid)
1323 || (real_uid == exim_uid)
1324 #ifdef CONFIGURE_OWNER
1325 || (real_uid == config_uid)
1329 debug_printf("macros_trusted rejecting macros for uid %d\n", (int) real_uid);
1333 /* Get a list of macros which are whitelisted */
1334 whitelisted = string_copy_malloc(US WHITELIST_D_MACROS);
1335 prev_char_item = FALSE;
1337 for (p = whitelisted; *p != '\0'; ++p)
1339 if (*p == ':' || isspace(*p))
1344 prev_char_item = FALSE;
1347 if (!prev_char_item)
1348 prev_char_item = TRUE;
1355 whites = store_malloc(sizeof(uschar *) * (white_count+1));
1356 for (p = whitelisted, i = 0; (p != end) && (i < white_count); ++p)
1361 if (i == white_count)
1363 while (*p != '\0' && p < end)
1369 /* The list of macros should be very short. Accept the N*M complexity. */
1370 for (m = macros; m != NULL; m = m->next)
1373 for (w = whites; *w; ++w)
1374 if (Ustrcmp(*w, m->name) == 0)
1381 if (m->replacement == NULL)
1383 len = Ustrlen(m->replacement);
1386 n = pcre_exec(regex_whitelisted_macro, NULL, CS m->replacement, len,
1387 0, PCRE_EOPT, NULL, 0);
1390 if (n != PCRE_ERROR_NOMATCH)
1391 debug_printf("macros_trusted checking %s returned %d\n", m->name, n);
1395 DEBUG(D_any) debug_printf("macros_trusted overridden to true by whitelisting\n");
1401 /*************************************************
1402 * Entry point and high-level code *
1403 *************************************************/
1405 /* Entry point for the Exim mailer. Analyse the arguments and arrange to take
1406 the appropriate action. All the necessary functions are present in the one
1407 binary. I originally thought one should split it up, but it turns out that so
1408 much of the apparatus is needed in each chunk that one might as well just have
1409 it all available all the time, which then makes the coding easier as well.
1412 argc count of entries in argv
1413 argv argument strings, with argv[0] being the program name
1415 Returns: EXIT_SUCCESS if terminated successfully
1416 EXIT_FAILURE otherwise, except when a message has been sent
1417 to the sender, and -oee was given
1421 main(int argc, char **cargv)
1423 uschar **argv = USS cargv;
1424 int arg_receive_timeout = -1;
1425 int arg_smtp_receive_timeout = -1;
1426 int arg_error_handling = error_handling;
1427 int filter_sfd = -1;
1428 int filter_ufd = -1;
1431 int list_queue_option = 0;
1433 int msg_action_arg = -1;
1434 int namelen = (argv[0] == NULL)? 0 : Ustrlen(argv[0]);
1435 int queue_only_reason = 0;
1437 int perl_start_option = 0;
1439 int recipients_arg = argc;
1440 int sender_address_domain = 0;
1441 int test_retry_arg = -1;
1442 int test_rewrite_arg = -1;
1443 BOOL arg_queue_only = FALSE;
1444 BOOL bi_option = FALSE;
1445 BOOL checking = FALSE;
1446 BOOL count_queue = FALSE;
1447 BOOL expansion_test = FALSE;
1448 BOOL extract_recipients = FALSE;
1449 BOOL flag_G = FALSE;
1450 BOOL flag_n = FALSE;
1451 BOOL forced_delivery = FALSE;
1452 BOOL f_end_dot = FALSE;
1453 BOOL deliver_give_up = FALSE;
1454 BOOL list_queue = FALSE;
1455 BOOL list_options = FALSE;
1456 BOOL local_queue_only;
1458 BOOL one_msg_action = FALSE;
1459 BOOL queue_only_set = FALSE;
1460 BOOL receiving_message = TRUE;
1461 BOOL sender_ident_set = FALSE;
1462 BOOL session_local_queue_only;
1464 BOOL removed_privilege = FALSE;
1465 BOOL usage_wanted = FALSE;
1466 BOOL verify_address_mode = FALSE;
1467 BOOL verify_as_sender = FALSE;
1468 BOOL version_printed = FALSE;
1469 uschar *alias_arg = NULL;
1470 uschar *called_as = US"";
1471 uschar *cmdline_syslog_name = NULL;
1472 uschar *start_queue_run_id = NULL;
1473 uschar *stop_queue_run_id = NULL;
1474 uschar *expansion_test_message = NULL;
1475 uschar *ftest_domain = NULL;
1476 uschar *ftest_localpart = NULL;
1477 uschar *ftest_prefix = NULL;
1478 uschar *ftest_suffix = NULL;
1479 uschar *malware_test_file = NULL;
1480 uschar *real_sender_address;
1481 uschar *originator_home = US"/";
1486 struct stat statbuf;
1487 pid_t passed_qr_pid = (pid_t)0;
1488 int passed_qr_pipe = -1;
1489 gid_t group_list[NGROUPS_MAX];
1491 /* For the -bI: flag */
1492 enum commandline_info info_flag = CMDINFO_NONE;
1493 BOOL info_stdout = FALSE;
1495 /* Possible options for -R and -S */
1497 static uschar *rsopts[] = { US"f", US"ff", US"r", US"rf", US"rff" };
1499 /* Need to define this in case we need to change the environment in order
1500 to get rid of a bogus time zone. We have to make it char rather than uschar
1501 because some OS define it in /usr/include/unistd.h. */
1503 extern char **environ;
1505 /* If the Exim user and/or group and/or the configuration file owner/group were
1506 defined by ref:name at build time, we must now find the actual uid/gid values.
1507 This is a feature to make the lives of binary distributors easier. */
1509 #ifdef EXIM_USERNAME
1510 if (route_finduser(US EXIM_USERNAME, &pw, &exim_uid))
1514 fprintf(stderr, "exim: refusing to run with uid 0 for \"%s\"\n",
1518 /* If ref:name uses a number as the name, route_finduser() returns
1519 TRUE with exim_uid set and pw coerced to NULL. */
1521 exim_gid = pw->pw_gid;
1522 #ifndef EXIM_GROUPNAME
1526 "exim: ref:name should specify a usercode, not a group.\n"
1527 "exim: can't let you get away with it unless you also specify a group.\n");
1534 fprintf(stderr, "exim: failed to find uid for user name \"%s\"\n",
1540 #ifdef EXIM_GROUPNAME
1541 if (!route_findgroup(US EXIM_GROUPNAME, &exim_gid))
1543 fprintf(stderr, "exim: failed to find gid for group name \"%s\"\n",
1549 #ifdef CONFIGURE_OWNERNAME
1550 if (!route_finduser(US CONFIGURE_OWNERNAME, NULL, &config_uid))
1552 fprintf(stderr, "exim: failed to find uid for user name \"%s\"\n",
1553 CONFIGURE_OWNERNAME);
1558 /* We default the system_filter_user to be the Exim run-time user, as a
1559 sane non-root value. */
1560 system_filter_uid = exim_uid;
1562 #ifdef CONFIGURE_GROUPNAME
1563 if (!route_findgroup(US CONFIGURE_GROUPNAME, &config_gid))
1565 fprintf(stderr, "exim: failed to find gid for group name \"%s\"\n",
1566 CONFIGURE_GROUPNAME);
1571 /* In the Cygwin environment, some initialization needs doing. It is fudged
1572 in by means of this macro. */
1578 /* Check a field which is patched when we are running Exim within its
1579 testing harness; do a fast initial check, and then the whole thing. */
1581 running_in_test_harness =
1582 *running_status == '<' && Ustrcmp(running_status, "<<<testing>>>") == 0;
1584 /* The C standard says that the equivalent of setlocale(LC_ALL, "C") is obeyed
1585 at the start of a program; however, it seems that some environments do not
1586 follow this. A "strange" locale can affect the formatting of timestamps, so we
1589 setlocale(LC_ALL, "C");
1591 /* Set up the default handler for timing using alarm(). */
1593 os_non_restarting_signal(SIGALRM, sigalrm_handler);
1595 /* Ensure we have a buffer for constructing log entries. Use malloc directly,
1596 because store_malloc writes a log entry on failure. */
1598 log_buffer = (uschar *)malloc(LOG_BUFFER_SIZE);
1599 if (log_buffer == NULL)
1601 fprintf(stderr, "exim: failed to get store for log buffer\n");
1605 /* Set log_stderr to stderr, provided that stderr exists. This gets reset to
1606 NULL when the daemon is run and the file is closed. We have to use this
1607 indirection, because some systems don't allow writing to the variable "stderr".
1610 if (fstat(fileno(stderr), &statbuf) >= 0) log_stderr = stderr;
1612 /* Arrange for the PCRE regex library to use our store functions. Note that
1613 the normal calls are actually macros that add additional arguments for
1614 debugging purposes so we have to assign specially constructed functions here.
1615 The default is to use store in the stacking pool, but this is overridden in the
1616 regex_must_compile() function. */
1618 pcre_malloc = function_store_get;
1619 pcre_free = function_dummy_free;
1621 /* Ensure there is a big buffer for temporary use in several places. It is put
1622 in malloc store so that it can be freed for enlargement if necessary. */
1624 big_buffer = store_malloc(big_buffer_size);
1626 /* Set up the handler for the data request signal, and set the initial
1627 descriptive text. */
1629 set_process_info("initializing");
1630 os_restarting_signal(SIGUSR1, usr1_handler);
1632 /* SIGHUP is used to get the daemon to reconfigure. It gets set as appropriate
1633 in the daemon code. For the rest of Exim's uses, we ignore it. */
1635 signal(SIGHUP, SIG_IGN);
1637 /* We don't want to die on pipe errors as the code is written to handle
1638 the write error instead. */
1640 signal(SIGPIPE, SIG_IGN);
1642 /* Under some circumstance on some OS, Exim can get called with SIGCHLD
1643 set to SIG_IGN. This causes subprocesses that complete before the parent
1644 process waits for them not to hang around, so when Exim calls wait(), nothing
1645 is there. The wait() code has been made robust against this, but let's ensure
1646 that SIGCHLD is set to SIG_DFL, because it's tidier to wait and get a process
1647 ending status. We use sigaction rather than plain signal() on those OS where
1648 SA_NOCLDWAIT exists, because we want to be sure it is turned off. (There was a
1649 problem on AIX with this.) */
1653 struct sigaction act;
1654 act.sa_handler = SIG_DFL;
1655 sigemptyset(&(act.sa_mask));
1657 sigaction(SIGCHLD, &act, NULL);
1660 signal(SIGCHLD, SIG_DFL);
1663 /* Save the arguments for use if we re-exec exim as a daemon after receiving
1668 /* Set up the version number. Set up the leading 'E' for the external form of
1669 message ids, set the pointer to the internal form, and initialize it to
1670 indicate no message being processed. */
1673 message_id_option[0] = '-';
1674 message_id_external = message_id_option + 1;
1675 message_id_external[0] = 'E';
1676 message_id = message_id_external + 1;
1679 /* Set the umask to zero so that any files Exim creates using open() are
1680 created with the modes that it specifies. NOTE: Files created with fopen() have
1681 a problem, which was not recognized till rather late (February 2006). With this
1682 umask, such files will be world writeable. (They are all content scanning files
1683 in the spool directory, which isn't world-accessible, so this is not a
1684 disaster, but it's untidy.) I don't want to change this overall setting,
1685 however, because it will interact badly with the open() calls. Instead, there's
1686 now a function called modefopen() that fiddles with the umask while calling
1691 /* Precompile the regular expression for matching a message id. Keep this in
1692 step with the code that generates ids in the accept.c module. We need to do
1693 this here, because the -M options check their arguments for syntactic validity
1694 using mac_ismsgid, which uses this. */
1697 regex_must_compile(US"^(?:[^\\W_]{6}-){2}[^\\W_]{2}$", FALSE, TRUE);
1699 /* Precompile the regular expression that is used for matching an SMTP error
1700 code, possibly extended, at the start of an error message. Note that the
1701 terminating whitespace character is included. */
1704 regex_must_compile(US"^\\d\\d\\d\\s(?:\\d\\.\\d\\d?\\d?\\.\\d\\d?\\d?\\s)?",
1707 #ifdef WHITELIST_D_MACROS
1708 /* Precompile the regular expression used to filter the content of macros
1709 given to -D for permissibility. */
1711 regex_whitelisted_macro =
1712 regex_must_compile(US"^[A-Za-z0-9_/.-]*$", FALSE, TRUE);
1716 /* If the program is called as "mailq" treat it as equivalent to "exim -bp";
1717 this seems to be a generally accepted convention, since one finds symbolic
1718 links called "mailq" in standard OS configurations. */
1720 if ((namelen == 5 && Ustrcmp(argv[0], "mailq") == 0) ||
1721 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/mailq", 6) == 0))
1724 receiving_message = FALSE;
1725 called_as = US"-mailq";
1728 /* If the program is called as "rmail" treat it as equivalent to
1729 "exim -i -oee", thus allowing UUCP messages to be input using non-SMTP mode,
1730 i.e. preventing a single dot on a line from terminating the message, and
1731 returning with zero return code, even in cases of error (provided an error
1732 message has been sent). */
1734 if ((namelen == 5 && Ustrcmp(argv[0], "rmail") == 0) ||
1735 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/rmail", 6) == 0))
1738 called_as = US"-rmail";
1739 errors_sender_rc = EXIT_SUCCESS;
1742 /* If the program is called as "rsmtp" treat it as equivalent to "exim -bS";
1743 this is a smail convention. */
1745 if ((namelen == 5 && Ustrcmp(argv[0], "rsmtp") == 0) ||
1746 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/rsmtp", 6) == 0))
1748 smtp_input = smtp_batched_input = TRUE;
1749 called_as = US"-rsmtp";
1752 /* If the program is called as "runq" treat it as equivalent to "exim -q";
1753 this is a smail convention. */
1755 if ((namelen == 4 && Ustrcmp(argv[0], "runq") == 0) ||
1756 (namelen > 4 && Ustrncmp(argv[0] + namelen - 5, "/runq", 5) == 0))
1759 receiving_message = FALSE;
1760 called_as = US"-runq";
1763 /* If the program is called as "newaliases" treat it as equivalent to
1764 "exim -bi"; this is a sendmail convention. */
1766 if ((namelen == 10 && Ustrcmp(argv[0], "newaliases") == 0) ||
1767 (namelen > 10 && Ustrncmp(argv[0] + namelen - 11, "/newaliases", 11) == 0))
1770 receiving_message = FALSE;
1771 called_as = US"-newaliases";
1774 /* Save the original effective uid for a couple of uses later. It should
1775 normally be root, but in some esoteric environments it may not be. */
1777 original_euid = geteuid();
1779 /* Get the real uid and gid. If the caller is root, force the effective uid/gid
1780 to be the same as the real ones. This makes a difference only if Exim is setuid
1781 (or setgid) to something other than root, which could be the case in some
1782 special configurations. */
1784 real_uid = getuid();
1785 real_gid = getgid();
1787 if (real_uid == root_uid)
1789 rv = setgid(real_gid);
1792 fprintf(stderr, "exim: setgid(%ld) failed: %s\n",
1793 (long int)real_gid, strerror(errno));
1796 rv = setuid(real_uid);
1799 fprintf(stderr, "exim: setuid(%ld) failed: %s\n",
1800 (long int)real_uid, strerror(errno));
1805 /* If neither the original real uid nor the original euid was root, Exim is
1806 running in an unprivileged state. */
1808 unprivileged = (real_uid != root_uid && original_euid != root_uid);
1810 /* Scan the program's arguments. Some can be dealt with right away; others are
1811 simply recorded for checking and handling afterwards. Do a high-level switch
1812 on the second character (the one after '-'), to save some effort. */
1814 for (i = 1; i < argc; i++)
1816 BOOL badarg = FALSE;
1817 uschar *arg = argv[i];
1821 /* An argument not starting with '-' is the start of a recipients list;
1822 break out of the options-scanning loop. */
1830 /* An option consistion of -- terminates the options */
1832 if (Ustrcmp(arg, "--") == 0)
1834 recipients_arg = i + 1;
1838 /* Handle flagged options */
1840 switchchar = arg[1];
1843 /* Make all -ex options synonymous with -oex arguments, since that
1844 is assumed by various callers. Also make -qR options synonymous with -R
1845 options, as that seems to be required as well. Allow for -qqR too, and
1846 the same for -S options. */
1848 if (Ustrncmp(arg+1, "oe", 2) == 0 ||
1849 Ustrncmp(arg+1, "qR", 2) == 0 ||
1850 Ustrncmp(arg+1, "qS", 2) == 0)
1852 switchchar = arg[2];
1855 else if (Ustrncmp(arg+1, "qqR", 3) == 0 || Ustrncmp(arg+1, "qqS", 3) == 0)
1857 switchchar = arg[3];
1859 queue_2stage = TRUE;
1862 /* Make -r synonymous with -f, since it is a documented alias */
1864 else if (arg[1] == 'r') switchchar = 'f';
1866 /* Make -ov synonymous with -v */
1868 else if (Ustrcmp(arg, "-ov") == 0)
1874 /* deal with --option_aliases */
1875 else if (switchchar == '-')
1877 if (Ustrcmp(argrest, "help") == 0)
1879 usage_wanted = TRUE;
1882 else if (Ustrcmp(argrest, "version") == 0)
1889 /* High-level switch on active initial letter */
1894 /* sendmail uses -Ac and -Am to control which .cf file is used;
1897 if (*argrest == '\0') { badarg = TRUE; break; }
1900 BOOL ignore = FALSE;
1905 if (*(argrest + 1) == '\0')
1909 if (!ignore) { badarg = TRUE; break; }
1913 /* -Btype is a sendmail option for 7bit/8bit setting. Exim is 8-bit clean
1914 so has no need of it. */
1917 if (*argrest == 0) i++; /* Skip over the type */
1922 receiving_message = FALSE; /* Reset TRUE for -bm, -bS, -bs below */
1924 /* -bd: Run in daemon mode, awaiting SMTP connections.
1925 -bdf: Ditto, but in the foreground.
1928 if (*argrest == 'd')
1930 daemon_listen = TRUE;
1931 if (*(++argrest) == 'f') background_daemon = FALSE;
1932 else if (*argrest != 0) { badarg = TRUE; break; }
1935 /* -be: Run in expansion test mode
1936 -bem: Ditto, but read a message from a file first
1939 else if (*argrest == 'e')
1941 expansion_test = checking = TRUE;
1942 if (argrest[1] == 'm')
1944 if (++i >= argc) { badarg = TRUE; break; }
1945 expansion_test_message = argv[i];
1948 if (argrest[1] != 0) { badarg = TRUE; break; }
1951 /* -bF: Run system filter test */
1953 else if (*argrest == 'F')
1955 filter_test |= FTEST_SYSTEM;
1956 if (*(++argrest) != 0) { badarg = TRUE; break; }
1957 if (++i < argc) filter_test_sfile = argv[i]; else
1959 fprintf(stderr, "exim: file name expected after %s\n", argv[i-1]);
1964 /* -bf: Run user filter test
1965 -bfd: Set domain for filter testing
1966 -bfl: Set local part for filter testing
1967 -bfp: Set prefix for filter testing
1968 -bfs: Set suffix for filter testing
1971 else if (*argrest == 'f')
1973 if (*(++argrest) == 0)
1975 filter_test |= FTEST_USER;
1976 if (++i < argc) filter_test_ufile = argv[i]; else
1978 fprintf(stderr, "exim: file name expected after %s\n", argv[i-1]);
1986 fprintf(stderr, "exim: string expected after %s\n", arg);
1989 if (Ustrcmp(argrest, "d") == 0) ftest_domain = argv[i];
1990 else if (Ustrcmp(argrest, "l") == 0) ftest_localpart = argv[i];
1991 else if (Ustrcmp(argrest, "p") == 0) ftest_prefix = argv[i];
1992 else if (Ustrcmp(argrest, "s") == 0) ftest_suffix = argv[i];
1993 else { badarg = TRUE; break; }
1997 /* -bh: Host checking - an IP address must follow. */
1999 else if (Ustrcmp(argrest, "h") == 0 || Ustrcmp(argrest, "hc") == 0)
2001 if (++i >= argc) { badarg = TRUE; break; }
2002 sender_host_address = argv[i];
2003 host_checking = checking = log_testing_mode = TRUE;
2004 host_checking_callout = argrest[1] == 'c';
2007 /* -bi: This option is used by sendmail to initialize *the* alias file,
2008 though it has the -oA option to specify a different file. Exim has no
2009 concept of *the* alias file, but since Sun's YP make script calls
2010 sendmail this way, some support must be provided. */
2012 else if (Ustrcmp(argrest, "i") == 0) bi_option = TRUE;
2014 /* -bI: provide information, of the type to follow after a colon.
2015 This is an Exim flag. */
2017 else if (argrest[0] == 'I' && Ustrlen(argrest) >= 2 && argrest[1] == ':')
2019 uschar *p = &argrest[2];
2020 info_flag = CMDINFO_HELP;
2023 if (strcmpic(p, CUS"sieve") == 0)
2025 info_flag = CMDINFO_SIEVE;
2028 else if (strcmpic(p, CUS"dscp") == 0)
2030 info_flag = CMDINFO_DSCP;
2033 else if (strcmpic(p, CUS"help") == 0)
2040 /* -bm: Accept and deliver message - the default option. Reinstate
2041 receiving_message, which got turned off for all -b options. */
2043 else if (Ustrcmp(argrest, "m") == 0) receiving_message = TRUE;
2045 /* -bmalware: test the filename given for malware */
2047 else if (Ustrcmp(argrest, "malware") == 0)
2049 if (++i >= argc) { badarg = TRUE; break; }
2050 malware_test_file = argv[i];
2053 /* -bnq: For locally originating messages, do not qualify unqualified
2054 addresses. In the envelope, this causes errors; in header lines they
2057 else if (Ustrcmp(argrest, "nq") == 0)
2059 allow_unqualified_sender = FALSE;
2060 allow_unqualified_recipient = FALSE;
2063 /* -bpxx: List the contents of the mail queue, in various forms. If
2064 the option is -bpc, just a queue count is needed. Otherwise, if the
2065 first letter after p is r, then order is random. */
2067 else if (*argrest == 'p')
2069 if (*(++argrest) == 'c')
2072 if (*(++argrest) != 0) badarg = TRUE;
2076 if (*argrest == 'r')
2078 list_queue_option = 8;
2081 else list_queue_option = 0;
2085 /* -bp: List the contents of the mail queue, top-level only */
2087 if (*argrest == 0) {}
2089 /* -bpu: List the contents of the mail queue, top-level undelivered */
2091 else if (Ustrcmp(argrest, "u") == 0) list_queue_option += 1;
2093 /* -bpa: List the contents of the mail queue, including all delivered */
2095 else if (Ustrcmp(argrest, "a") == 0) list_queue_option += 2;
2097 /* Unknown after -bp[r] */
2107 /* -bP: List the configuration variables given as the address list.
2108 Force -v, so configuration errors get displayed. */
2110 else if (Ustrcmp(argrest, "P") == 0)
2112 list_options = TRUE;
2113 debug_selector |= D_v;
2114 debug_file = stderr;
2117 /* -brt: Test retry configuration lookup */
2119 else if (Ustrcmp(argrest, "rt") == 0)
2121 test_retry_arg = i + 1;
2125 /* -brw: Test rewrite configuration */
2127 else if (Ustrcmp(argrest, "rw") == 0)
2129 test_rewrite_arg = i + 1;
2133 /* -bS: Read SMTP commands on standard input, but produce no replies -
2134 all errors are reported by sending messages. */
2136 else if (Ustrcmp(argrest, "S") == 0)
2137 smtp_input = smtp_batched_input = receiving_message = TRUE;
2139 /* -bs: Read SMTP commands on standard input and produce SMTP replies
2140 on standard output. */
2142 else if (Ustrcmp(argrest, "s") == 0) smtp_input = receiving_message = TRUE;
2144 /* -bt: address testing mode */
2146 else if (Ustrcmp(argrest, "t") == 0)
2147 address_test_mode = checking = log_testing_mode = TRUE;
2149 /* -bv: verify addresses */
2151 else if (Ustrcmp(argrest, "v") == 0)
2152 verify_address_mode = checking = log_testing_mode = TRUE;
2154 /* -bvs: verify sender addresses */
2156 else if (Ustrcmp(argrest, "vs") == 0)
2158 verify_address_mode = checking = log_testing_mode = TRUE;
2159 verify_as_sender = TRUE;
2162 /* -bV: Print version string and support details */
2164 else if (Ustrcmp(argrest, "V") == 0)
2166 printf("Exim version %s #%s built %s\n", version_string,
2167 version_cnumber, version_date);
2168 printf("%s\n", CS version_copyright);
2169 version_printed = TRUE;
2170 show_whats_supported(stdout);
2173 /* -bw: inetd wait mode, accept a listening socket as stdin */
2175 else if (*argrest == 'w')
2177 inetd_wait_mode = TRUE;
2178 background_daemon = FALSE;
2179 daemon_listen = TRUE;
2180 if (*(++argrest) != '\0')
2182 inetd_wait_timeout = readconf_readtime(argrest, 0, FALSE);
2183 if (inetd_wait_timeout <= 0)
2185 fprintf(stderr, "exim: bad time value %s: abandoned\n", argv[i]);
2195 /* -C: change configuration file list; ignore if it isn't really
2196 a change! Enforce a prefix check if required. */
2201 if(++i < argc) argrest = argv[i]; else
2202 { badarg = TRUE; break; }
2204 if (Ustrcmp(config_main_filelist, argrest) != 0)
2206 #ifdef ALT_CONFIG_PREFIX
2208 int len = Ustrlen(ALT_CONFIG_PREFIX);
2209 uschar *list = argrest;
2211 while((filename = string_nextinlist(&list, &sep, big_buffer,
2212 big_buffer_size)) != NULL)
2214 if ((Ustrlen(filename) < len ||
2215 Ustrncmp(filename, ALT_CONFIG_PREFIX, len) != 0 ||
2216 Ustrstr(filename, "/../") != NULL) &&
2217 (Ustrcmp(filename, "/dev/null") != 0 || real_uid != root_uid))
2219 fprintf(stderr, "-C Permission denied\n");
2224 if (real_uid != root_uid)
2226 #ifdef TRUSTED_CONFIG_LIST
2228 if (real_uid != exim_uid
2229 #ifdef CONFIGURE_OWNER
2230 && real_uid != config_uid
2233 trusted_config = FALSE;
2236 FILE *trust_list = Ufopen(TRUSTED_CONFIG_LIST, "rb");
2239 struct stat statbuf;
2241 if (fstat(fileno(trust_list), &statbuf) != 0 ||
2242 (statbuf.st_uid != root_uid /* owner not root */
2243 #ifdef CONFIGURE_OWNER
2244 && statbuf.st_uid != config_uid /* owner not the special one */
2247 (statbuf.st_gid != root_gid /* group not root */
2248 #ifdef CONFIGURE_GROUP
2249 && statbuf.st_gid != config_gid /* group not the special one */
2251 && (statbuf.st_mode & 020) != 0 /* group writeable */
2253 (statbuf.st_mode & 2) != 0) /* world writeable */
2255 trusted_config = FALSE;
2260 /* Well, the trust list at least is up to scratch... */
2261 void *reset_point = store_get(0);
2262 uschar *trusted_configs[32];
2266 while (Ufgets(big_buffer, big_buffer_size, trust_list))
2268 uschar *start = big_buffer, *nl;
2269 while (*start && isspace(*start))
2273 nl = Ustrchr(start, '\n');
2276 trusted_configs[nr_configs++] = string_copy(start);
2277 if (nr_configs == 32)
2285 uschar *list = argrest;
2287 while (trusted_config && (filename = string_nextinlist(&list,
2288 &sep, big_buffer, big_buffer_size)) != NULL)
2290 for (i=0; i < nr_configs; i++)
2292 if (Ustrcmp(filename, trusted_configs[i]) == 0)
2295 if (i == nr_configs)
2297 trusted_config = FALSE;
2301 store_reset(reset_point);
2305 /* No valid prefixes found in trust_list file. */
2306 trusted_config = FALSE;
2312 /* Could not open trust_list file. */
2313 trusted_config = FALSE;
2317 /* Not root; don't trust config */
2318 trusted_config = FALSE;
2322 config_main_filelist = argrest;
2323 config_changed = TRUE;
2328 /* -D: set up a macro definition */
2331 #ifdef DISABLE_D_OPTION
2332 fprintf(stderr, "exim: -D is not available in this Exim binary\n");
2337 macro_item *mlast = NULL;
2340 uschar *s = argrest;
2342 while (isspace(*s)) s++;
2344 if (*s < 'A' || *s > 'Z')
2346 fprintf(stderr, "exim: macro name set by -D must start with "
2347 "an upper case letter\n");
2351 while (isalnum(*s) || *s == '_')
2353 if (ptr < sizeof(name)-1) name[ptr++] = *s;
2357 if (ptr == 0) { badarg = TRUE; break; }
2358 while (isspace(*s)) s++;
2361 if (*s++ != '=') { badarg = TRUE; break; }
2362 while (isspace(*s)) s++;
2365 for (m = macros; m != NULL; m = m->next)
2367 if (Ustrcmp(m->name, name) == 0)
2369 fprintf(stderr, "exim: duplicated -D in command line\n");
2375 m = store_get(sizeof(macro_item) + Ustrlen(name));
2377 m->command_line = TRUE;
2378 if (mlast == NULL) macros = m; else mlast->next = m;
2379 Ustrcpy(m->name, name);
2380 m->replacement = string_copy(s);
2382 if (clmacro_count >= MAX_CLMACROS)
2384 fprintf(stderr, "exim: too many -D options on command line\n");
2387 clmacros[clmacro_count++] = string_sprintf("-D%s=%s", m->name,
2393 /* -d: Set debug level (see also -v below) or set the drop_cr option.
2394 The latter is now a no-op, retained for compatibility only. If -dd is used,
2395 debugging subprocesses of the daemon is disabled. */
2398 if (Ustrcmp(argrest, "ropcr") == 0)
2400 /* drop_cr = TRUE; */
2403 /* Use an intermediate variable so that we don't set debugging while
2404 decoding the debugging bits. */
2408 unsigned int selector = D_default;
2411 if (*argrest == 'd')
2413 debug_daemon = TRUE;
2417 decode_bits(&selector, NULL, D_memory, 0, argrest, debug_options,
2418 debug_options_count, US"debug", 0);
2419 debug_selector = selector;
2424 /* -E: This is a local error message. This option is not intended for
2425 external use at all, but is not restricted to trusted callers because it
2426 does no harm (just suppresses certain error messages) and if Exim is run
2427 not setuid root it won't always be trusted when it generates error
2428 messages using this option. If there is a message id following -E, point
2429 message_reference at it, for logging. */
2432 local_error_message = TRUE;
2433 if (mac_ismsgid(argrest)) message_reference = argrest;
2437 /* -ex: The vacation program calls sendmail with the undocumented "-eq"
2438 option, so it looks as if historically the -oex options are also callable
2439 without the leading -o. So we have to accept them. Before the switch,
2440 anything starting -oe has been converted to -e. Exim does not support all
2441 of the sendmail error options. */
2444 if (Ustrcmp(argrest, "e") == 0)
2446 arg_error_handling = ERRORS_SENDER;
2447 errors_sender_rc = EXIT_SUCCESS;
2449 else if (Ustrcmp(argrest, "m") == 0) arg_error_handling = ERRORS_SENDER;
2450 else if (Ustrcmp(argrest, "p") == 0) arg_error_handling = ERRORS_STDERR;
2451 else if (Ustrcmp(argrest, "q") == 0) arg_error_handling = ERRORS_STDERR;
2452 else if (Ustrcmp(argrest, "w") == 0) arg_error_handling = ERRORS_SENDER;
2457 /* -F: Set sender's full name, used instead of the gecos entry from
2458 the password file. Since users can usually alter their gecos entries,
2459 there's no security involved in using this instead. The data can follow
2460 the -F or be in the next argument. */
2465 if(++i < argc) argrest = argv[i]; else
2466 { badarg = TRUE; break; }
2468 originator_name = argrest;
2469 sender_name_forced = TRUE;
2473 /* -f: Set sender's address - this value is only actually used if Exim is
2474 run by a trusted user, or if untrusted_set_sender is set and matches the
2475 address, except that the null address can always be set by any user. The
2476 test for this happens later, when the value given here is ignored when not
2477 permitted. For an untrusted user, the actual sender is still put in Sender:
2478 if it doesn't match the From: header (unless no_local_from_check is set).
2479 The data can follow the -f or be in the next argument. The -r switch is an
2480 obsolete form of -f but since there appear to be programs out there that
2481 use anything that sendmail has ever supported, better accept it - the
2482 synonymizing is done before the switch above.
2484 At this stage, we must allow domain literal addresses, because we don't
2485 know what the setting of allow_domain_literals is yet. Ditto for trailing
2486 dots and strip_trailing_dot. */
2494 if (i+1 < argc) argrest = argv[++i]; else
2495 { badarg = TRUE; break; }
2499 sender_address = string_sprintf(""); /* Ensure writeable memory */
2503 uschar *temp = argrest + Ustrlen(argrest) - 1;
2504 while (temp >= argrest && isspace(*temp)) temp--;
2505 if (temp >= argrest && *temp == '.') f_end_dot = TRUE;
2506 allow_domain_literals = TRUE;
2507 strip_trailing_dot = TRUE;
2508 sender_address = parse_extract_address(argrest, &errmess, &start, &end,
2509 &sender_address_domain, TRUE);
2510 allow_domain_literals = FALSE;
2511 strip_trailing_dot = FALSE;
2512 if (sender_address == NULL)
2514 fprintf(stderr, "exim: bad -f address \"%s\": %s\n", argrest, errmess);
2515 return EXIT_FAILURE;
2518 sender_address_forced = TRUE;
2522 /* -G: sendmail invocation to specify that it's a gateway submission and
2523 sendmail may complain about problems instead of fixing them.
2524 We make it equivalent to an ACL "control = suppress_local_fixups" and do
2525 not at this time complain about problems. */
2531 /* -h: Set the hop count for an incoming message. Exim does not currently
2532 support this; it always computes it by counting the Received: headers.
2533 To put it in will require a change to the spool header file format. */
2538 if(++i < argc) argrest = argv[i]; else
2539 { badarg = TRUE; break; }
2541 if (!isdigit(*argrest)) badarg = TRUE;
2545 /* -i: Set flag so dot doesn't end non-SMTP input (same as -oi, seems
2546 not to be documented for sendmail but mailx (at least) uses it) */
2549 if (*argrest == 0) dot_ends = FALSE; else badarg = TRUE;
2553 /* -L: set the identifier used for syslog; equivalent to setting
2554 syslog_processname in the config file, but needs to be an admin option. */
2557 if (*argrest == '\0')
2559 if(++i < argc) argrest = argv[i]; else
2560 { badarg = TRUE; break; }
2562 sz = Ustrlen(argrest);
2565 fprintf(stderr, "exim: the -L syslog name is too long: \"%s\"\n", argrest);
2566 return EXIT_FAILURE;
2570 fprintf(stderr, "exim: the -L syslog name is too short\n");
2571 return EXIT_FAILURE;
2573 cmdline_syslog_name = argrest;
2577 receiving_message = FALSE;
2579 /* -MC: continue delivery of another message via an existing open
2580 file descriptor. This option is used for an internal call by the
2581 smtp transport when there is a pending message waiting to go to an
2582 address to which it has got a connection. Five subsequent arguments are
2583 required: transport name, host name, IP address, sequence number, and
2584 message_id. Transports may decline to create new processes if the sequence
2585 number gets too big. The channel is stdin. This (-MC) must be the last
2586 argument. There's a subsequent check that the real-uid is privileged.
2588 If we are running in the test harness. delay for a bit, to let the process
2589 that set this one up complete. This makes for repeatability of the logging,
2592 if (Ustrcmp(argrest, "C") == 0)
2594 union sockaddr_46 interface_sock;
2595 EXIM_SOCKLEN_T size = sizeof(interface_sock);
2599 fprintf(stderr, "exim: too many or too few arguments after -MC\n");
2600 return EXIT_FAILURE;
2603 if (msg_action_arg >= 0)
2605 fprintf(stderr, "exim: incompatible arguments\n");
2606 return EXIT_FAILURE;
2609 continue_transport = argv[++i];
2610 continue_hostname = argv[++i];
2611 continue_host_address = argv[++i];
2612 continue_sequence = Uatoi(argv[++i]);
2613 msg_action = MSG_DELIVER;
2614 msg_action_arg = ++i;
2615 forced_delivery = TRUE;
2616 queue_run_pid = passed_qr_pid;
2617 queue_run_pipe = passed_qr_pipe;
2619 if (!mac_ismsgid(argv[i]))
2621 fprintf(stderr, "exim: malformed message id %s after -MC option\n",
2623 return EXIT_FAILURE;
2626 /* Set up $sending_ip_address and $sending_port */
2628 if (getsockname(fileno(stdin), (struct sockaddr *)(&interface_sock),
2630 sending_ip_address = host_ntoa(-1, &interface_sock, NULL,
2634 fprintf(stderr, "exim: getsockname() failed after -MC option: %s\n",
2636 return EXIT_FAILURE;
2639 if (running_in_test_harness) millisleep(500);
2643 /* -MCA: set the smtp_authenticated flag; this is useful only when it
2644 precedes -MC (see above). The flag indicates that the host to which
2645 Exim is connected has accepted an AUTH sequence. */
2647 else if (Ustrcmp(argrest, "CA") == 0)
2649 smtp_authenticated = TRUE;
2653 /* -MCP: set the smtp_use_pipelining flag; this is useful only when
2654 it preceded -MC (see above) */
2656 else if (Ustrcmp(argrest, "CP") == 0)
2658 smtp_use_pipelining = TRUE;
2662 /* -MCQ: pass on the pid of the queue-running process that started
2663 this chain of deliveries and the fd of its synchronizing pipe; this
2664 is useful only when it precedes -MC (see above) */
2666 else if (Ustrcmp(argrest, "CQ") == 0)
2668 if(++i < argc) passed_qr_pid = (pid_t)(Uatol(argv[i]));
2670 if(++i < argc) passed_qr_pipe = (int)(Uatol(argv[i]));
2675 /* -MCS: set the smtp_use_size flag; this is useful only when it
2676 precedes -MC (see above) */
2678 else if (Ustrcmp(argrest, "CS") == 0)
2680 smtp_use_size = TRUE;
2684 /* -MCT: set the tls_offered flag; this is useful only when it
2685 precedes -MC (see above). The flag indicates that the host to which
2686 Exim is connected has offered TLS support. */
2689 else if (Ustrcmp(argrest, "CT") == 0)
2696 /* -M[x]: various operations on the following list of message ids:
2697 -M deliver the messages, ignoring next retry times and thawing
2698 -Mc deliver the messages, checking next retry times, no thawing
2699 -Mf freeze the messages
2700 -Mg give up on the messages
2701 -Mt thaw the messages
2702 -Mrm remove the messages
2703 In the above cases, this must be the last option. There are also the
2704 following options which are followed by a single message id, and which
2705 act on that message. Some of them use the "recipient" addresses as well.
2706 -Mar add recipient(s)
2707 -Mmad mark all recipients delivered
2708 -Mmd mark recipients(s) delivered
2710 -Mset load a message for use with -be
2712 -Mvc show copy (of whole message, in RFC 2822 format)
2717 else if (*argrest == 0)
2719 msg_action = MSG_DELIVER;
2720 forced_delivery = deliver_force_thaw = TRUE;
2722 else if (Ustrcmp(argrest, "ar") == 0)
2724 msg_action = MSG_ADD_RECIPIENT;
2725 one_msg_action = TRUE;
2727 else if (Ustrcmp(argrest, "c") == 0) msg_action = MSG_DELIVER;
2728 else if (Ustrcmp(argrest, "es") == 0)
2730 msg_action = MSG_EDIT_SENDER;
2731 one_msg_action = TRUE;
2733 else if (Ustrcmp(argrest, "f") == 0) msg_action = MSG_FREEZE;
2734 else if (Ustrcmp(argrest, "g") == 0)
2736 msg_action = MSG_DELIVER;
2737 deliver_give_up = TRUE;
2739 else if (Ustrcmp(argrest, "mad") == 0)
2741 msg_action = MSG_MARK_ALL_DELIVERED;
2743 else if (Ustrcmp(argrest, "md") == 0)
2745 msg_action = MSG_MARK_DELIVERED;
2746 one_msg_action = TRUE;
2748 else if (Ustrcmp(argrest, "rm") == 0) msg_action = MSG_REMOVE;
2749 else if (Ustrcmp(argrest, "set") == 0)
2751 msg_action = MSG_LOAD;
2752 one_msg_action = TRUE;
2754 else if (Ustrcmp(argrest, "t") == 0) msg_action = MSG_THAW;
2755 else if (Ustrcmp(argrest, "vb") == 0)
2757 msg_action = MSG_SHOW_BODY;
2758 one_msg_action = TRUE;
2760 else if (Ustrcmp(argrest, "vc") == 0)
2762 msg_action = MSG_SHOW_COPY;
2763 one_msg_action = TRUE;
2765 else if (Ustrcmp(argrest, "vh") == 0)
2767 msg_action = MSG_SHOW_HEADER;
2768 one_msg_action = TRUE;
2770 else if (Ustrcmp(argrest, "vl") == 0)
2772 msg_action = MSG_SHOW_LOG;
2773 one_msg_action = TRUE;
2775 else { badarg = TRUE; break; }
2777 /* All the -Mxx options require at least one message id. */
2779 msg_action_arg = i + 1;
2780 if (msg_action_arg >= argc)
2782 fprintf(stderr, "exim: no message ids given after %s option\n", arg);
2783 return EXIT_FAILURE;
2786 /* Some require only message ids to follow */
2788 if (!one_msg_action)
2791 for (j = msg_action_arg; j < argc; j++) if (!mac_ismsgid(argv[j]))
2793 fprintf(stderr, "exim: malformed message id %s after %s option\n",
2795 return EXIT_FAILURE;
2797 goto END_ARG; /* Remaining args are ids */
2800 /* Others require only one message id, possibly followed by addresses,
2801 which will be handled as normal arguments. */
2805 if (!mac_ismsgid(argv[msg_action_arg]))
2807 fprintf(stderr, "exim: malformed message id %s after %s option\n",
2808 argv[msg_action_arg], arg);
2809 return EXIT_FAILURE;
2816 /* Some programs seem to call the -om option without the leading o;
2817 for sendmail it askes for "me too". Exim always does this. */
2820 if (*argrest != 0) badarg = TRUE;
2824 /* -N: don't do delivery - a debugging option that stops transports doing
2825 their thing. It implies debugging at the D_v level. */
2830 dont_deliver = TRUE;
2831 debug_selector |= D_v;
2832 debug_file = stderr;
2838 /* -n: This means "don't alias" in sendmail, apparently.
2839 For normal invocations, it has no effect.
2840 It may affect some other options. */
2846 /* -O: Just ignore it. In sendmail, apparently -O option=value means set
2847 option to the specified value. This form uses long names. We need to handle
2848 -O option=value and -Ooption=value. */
2855 fprintf(stderr, "exim: string expected after -O\n");
2863 /* -oA: Set an argument for the bi command (sendmail's "alternate alias
2866 if (*argrest == 'A')
2868 alias_arg = argrest + 1;
2869 if (alias_arg[0] == 0)
2871 if (i+1 < argc) alias_arg = argv[++i]; else
2873 fprintf(stderr, "exim: string expected after -oA\n");
2879 /* -oB: Set a connection message max value for remote deliveries */
2881 else if (*argrest == 'B')
2883 uschar *p = argrest + 1;
2886 if (i+1 < argc && isdigit((argv[i+1][0]))) p = argv[++i]; else
2888 connection_max_messages = 1;
2897 fprintf(stderr, "exim: number expected after -oB\n");
2900 connection_max_messages = Uatoi(p);
2904 /* -odb: background delivery */
2906 else if (Ustrcmp(argrest, "db") == 0)
2908 synchronous_delivery = FALSE;
2909 arg_queue_only = FALSE;
2910 queue_only_set = TRUE;
2913 /* -odf: foreground delivery (smail-compatible option); same effect as
2914 -odi: interactive (synchronous) delivery (sendmail-compatible option)
2917 else if (Ustrcmp(argrest, "df") == 0 || Ustrcmp(argrest, "di") == 0)
2919 synchronous_delivery = TRUE;
2920 arg_queue_only = FALSE;
2921 queue_only_set = TRUE;
2924 /* -odq: queue only */
2926 else if (Ustrcmp(argrest, "dq") == 0)
2928 synchronous_delivery = FALSE;
2929 arg_queue_only = TRUE;
2930 queue_only_set = TRUE;
2933 /* -odqs: queue SMTP only - do local deliveries and remote routing,
2934 but no remote delivery */
2936 else if (Ustrcmp(argrest, "dqs") == 0)
2939 arg_queue_only = FALSE;
2940 queue_only_set = TRUE;
2943 /* -oex: Sendmail error flags. As these are also accepted without the
2944 leading -o prefix, for compatibility with vacation and other callers,
2945 they are handled with -e above. */
2947 /* -oi: Set flag so dot doesn't end non-SMTP input (same as -i)
2948 -oitrue: Another sendmail syntax for the same */
2950 else if (Ustrcmp(argrest, "i") == 0 ||
2951 Ustrcmp(argrest, "itrue") == 0)
2954 /* -oM*: Set various characteristics for an incoming message; actually
2955 acted on for trusted callers only. */
2957 else if (*argrest == 'M')
2961 fprintf(stderr, "exim: data expected after -o%s\n", argrest);
2965 /* -oMa: Set sender host address */
2967 if (Ustrcmp(argrest, "Ma") == 0) sender_host_address = argv[++i];
2969 /* -oMaa: Set authenticator name */
2971 else if (Ustrcmp(argrest, "Maa") == 0)
2972 sender_host_authenticated = argv[++i];
2974 /* -oMas: setting authenticated sender */
2976 else if (Ustrcmp(argrest, "Mas") == 0) authenticated_sender = argv[++i];
2978 /* -oMai: setting authenticated id */
2980 else if (Ustrcmp(argrest, "Mai") == 0) authenticated_id = argv[++i];
2982 /* -oMi: Set incoming interface address */
2984 else if (Ustrcmp(argrest, "Mi") == 0) interface_address = argv[++i];
2986 /* -oMr: Received protocol */
2988 else if (Ustrcmp(argrest, "Mr") == 0) received_protocol = argv[++i];
2990 /* -oMs: Set sender host name */
2992 else if (Ustrcmp(argrest, "Ms") == 0) sender_host_name = argv[++i];
2994 /* -oMt: Set sender ident */
2996 else if (Ustrcmp(argrest, "Mt") == 0)
2998 sender_ident_set = TRUE;
2999 sender_ident = argv[++i];
3002 /* Else a bad argument */
3011 /* -om: Me-too flag for aliases. Exim always does this. Some programs
3012 seem to call this as -m (undocumented), so that is also accepted (see
3015 else if (Ustrcmp(argrest, "m") == 0) {}
3017 /* -oo: An ancient flag for old-style addresses which still seems to
3018 crop up in some calls (see in SCO). */
3020 else if (Ustrcmp(argrest, "o") == 0) {}
3022 /* -oP <name>: set pid file path for daemon */
3024 else if (Ustrcmp(argrest, "P") == 0)
3025 override_pid_file_path = argv[++i];
3027 /* -or <n>: set timeout for non-SMTP acceptance
3028 -os <n>: set timeout for SMTP acceptance */
3030 else if (*argrest == 'r' || *argrest == 's')
3032 int *tp = (*argrest == 'r')?
3033 &arg_receive_timeout : &arg_smtp_receive_timeout;
3034 if (argrest[1] == 0)
3036 if (i+1 < argc) *tp= readconf_readtime(argv[++i], 0, FALSE);
3038 else *tp = readconf_readtime(argrest + 1, 0, FALSE);
3041 fprintf(stderr, "exim: bad time value %s: abandoned\n", argv[i]);
3046 /* -oX <list>: Override local_interfaces and/or default daemon ports */
3048 else if (Ustrcmp(argrest, "X") == 0)
3049 override_local_interfaces = argv[++i];
3051 /* Unknown -o argument */
3057 /* -ps: force Perl startup; -pd force delayed Perl startup */
3061 if (*argrest == 's' && argrest[1] == 0)
3063 perl_start_option = 1;
3066 if (*argrest == 'd' && argrest[1] == 0)
3068 perl_start_option = -1;
3073 /* -panythingelse is taken as the Sendmail-compatible argument -prval:sval,
3074 which sets the host protocol and host name */
3078 if (i+1 < argc) argrest = argv[++i]; else
3079 { badarg = TRUE; break; }
3084 uschar *hn = Ustrchr(argrest, ':');
3087 received_protocol = argrest;
3091 received_protocol = string_copyn(argrest, hn - argrest);
3092 sender_host_name = hn + 1;
3099 receiving_message = FALSE;
3100 if (queue_interval >= 0)
3102 fprintf(stderr, "exim: -q specified more than once\n");
3106 /* -qq...: Do queue runs in a 2-stage manner */
3108 if (*argrest == 'q')
3110 queue_2stage = TRUE;
3114 /* -qi...: Do only first (initial) deliveries */
3116 if (*argrest == 'i')
3118 queue_run_first_delivery = TRUE;
3122 /* -qf...: Run the queue, forcing deliveries
3123 -qff..: Ditto, forcing thawing as well */
3125 if (*argrest == 'f')
3127 queue_run_force = TRUE;
3128 if (*(++argrest) == 'f')
3130 deliver_force_thaw = TRUE;
3135 /* -q[f][f]l...: Run the queue only on local deliveries */
3137 if (*argrest == 'l')
3139 queue_run_local = TRUE;
3143 /* -q[f][f][l]: Run the queue, optionally forced, optionally local only,
3144 optionally starting from a given message id. */
3146 if (*argrest == 0 &&
3147 (i + 1 >= argc || argv[i+1][0] == '-' || mac_ismsgid(argv[i+1])))
3150 if (i+1 < argc && mac_ismsgid(argv[i+1]))
3151 start_queue_run_id = argv[++i];
3152 if (i+1 < argc && mac_ismsgid(argv[i+1]))
3153 stop_queue_run_id = argv[++i];
3156 /* -q[f][f][l]<n>: Run the queue at regular intervals, optionally forced,
3157 optionally local only. */
3162 queue_interval = readconf_readtime(argrest, 0, FALSE);
3164 queue_interval = readconf_readtime(argv[++i], 0, FALSE);
3165 if (queue_interval <= 0)
3167 fprintf(stderr, "exim: bad time value %s: abandoned\n", argv[i]);
3174 case 'R': /* Synonymous with -qR... */
3175 receiving_message = FALSE;
3177 /* -Rf: As -R (below) but force all deliveries,
3178 -Rff: Ditto, but also thaw all frozen messages,
3179 -Rr: String is regex
3180 -Rrf: Regex and force
3181 -Rrff: Regex and force and thaw
3183 in all cases provided there are no further characters in this
3189 for (i = 0; i < sizeof(rsopts)/sizeof(uschar *); i++)
3191 if (Ustrcmp(argrest, rsopts[i]) == 0)
3193 if (i != 2) queue_run_force = TRUE;
3194 if (i >= 2) deliver_selectstring_regex = TRUE;
3195 if (i == 1 || i == 4) deliver_force_thaw = TRUE;
3196 argrest += Ustrlen(rsopts[i]);
3201 /* -R: Set string to match in addresses for forced queue run to
3202 pick out particular messages. */
3206 if (i+1 < argc) deliver_selectstring = argv[++i]; else
3208 fprintf(stderr, "exim: string expected after -R\n");
3212 else deliver_selectstring = argrest;
3216 /* -r: an obsolete synonym for -f (see above) */
3219 /* -S: Like -R but works on sender. */
3221 case 'S': /* Synonymous with -qS... */
3222 receiving_message = FALSE;
3224 /* -Sf: As -S (below) but force all deliveries,
3225 -Sff: Ditto, but also thaw all frozen messages,
3226 -Sr: String is regex
3227 -Srf: Regex and force
3228 -Srff: Regex and force and thaw
3230 in all cases provided there are no further characters in this
3236 for (i = 0; i < sizeof(rsopts)/sizeof(uschar *); i++)
3238 if (Ustrcmp(argrest, rsopts[i]) == 0)
3240 if (i != 2) queue_run_force = TRUE;
3241 if (i >= 2) deliver_selectstring_sender_regex = TRUE;
3242 if (i == 1 || i == 4) deliver_force_thaw = TRUE;
3243 argrest += Ustrlen(rsopts[i]);
3248 /* -S: Set string to match in addresses for forced queue run to
3249 pick out particular messages. */
3253 if (i+1 < argc) deliver_selectstring_sender = argv[++i]; else
3255 fprintf(stderr, "exim: string expected after -S\n");
3259 else deliver_selectstring_sender = argrest;
3262 /* -Tqt is an option that is exclusively for use by the testing suite.
3263 It is not recognized in other circumstances. It allows for the setting up
3264 of explicit "queue times" so that various warning/retry things can be
3265 tested. Otherwise variability of clock ticks etc. cause problems. */
3268 if (running_in_test_harness && Ustrcmp(argrest, "qt") == 0)
3269 fudged_queue_times = argv[++i];
3274 /* -t: Set flag to extract recipients from body of message. */
3277 if (*argrest == 0) extract_recipients = TRUE;
3279 /* -ti: Set flag to extract recipients from body of message, and also
3280 specify that dot does not end the message. */
3282 else if (Ustrcmp(argrest, "i") == 0)
3284 extract_recipients = TRUE;
3288 /* -tls-on-connect: don't wait for STARTTLS (for old clients) */
3291 else if (Ustrcmp(argrest, "ls-on-connect") == 0) tls_in.on_connect = TRUE;
3298 /* -U: This means "initial user submission" in sendmail, apparently. The
3299 doc claims that in future sendmail may refuse syntactically invalid
3300 messages instead of fixing them. For the moment, we just ignore it. */
3306 /* -v: verify things - this is a very low-level debugging */
3311 debug_selector |= D_v;
3312 debug_file = stderr;
3318 /* -x: AIX uses this to indicate some fancy 8-bit character stuff:
3320 The -x flag tells the sendmail command that mail from a local
3321 mail program has National Language Support (NLS) extended characters
3322 in the body of the mail item. The sendmail command can send mail with
3323 extended NLS characters across networks that normally corrupts these
3326 As Exim is 8-bit clean, it just ignores this flag. */
3329 if (*argrest != 0) badarg = TRUE;
3332 /* -X: in sendmail: takes one parameter, logfile, and sends debugging
3333 logs to that file. We swallow the parameter and otherwise ignore it. */
3336 if (*argrest == '\0')
3340 fprintf(stderr, "exim: string expected after -X\n");
3346 /* All other initial characters are errors */
3351 } /* End of high-level switch statement */
3353 /* Failed to recognize the option, or syntax error */
3357 fprintf(stderr, "exim abandoned: unknown, malformed, or incomplete "
3358 "option %s\n", arg);
3364 /* If -R or -S have been specified without -q, assume a single queue run. */
3366 if ((deliver_selectstring != NULL || deliver_selectstring_sender != NULL) &&
3367 queue_interval < 0) queue_interval = 0;
3371 /* If usage_wanted is set we call the usage function - which never returns */
3372 if (usage_wanted) exim_usage(called_as);
3374 /* Arguments have been processed. Check for incompatibilities. */
3376 (smtp_input || extract_recipients || recipients_arg < argc) &&
3377 (daemon_listen || queue_interval >= 0 || bi_option ||
3378 test_retry_arg >= 0 || test_rewrite_arg >= 0 ||
3379 filter_test != FTEST_NONE || (msg_action_arg > 0 && !one_msg_action))
3382 msg_action_arg > 0 &&
3383 (daemon_listen || queue_interval >= 0 || list_options ||
3384 (checking && msg_action != MSG_LOAD) ||
3385 bi_option || test_retry_arg >= 0 || test_rewrite_arg >= 0)
3388 (daemon_listen || queue_interval >= 0) &&
3389 (sender_address != NULL || list_options || list_queue || checking ||
3393 daemon_listen && queue_interval == 0
3396 inetd_wait_mode && queue_interval >= 0
3400 (checking || smtp_input || extract_recipients ||
3401 filter_test != FTEST_NONE || bi_option)
3404 verify_address_mode &&
3405 (address_test_mode || smtp_input || extract_recipients ||
3406 filter_test != FTEST_NONE || bi_option)
3409 address_test_mode && (smtp_input || extract_recipients ||
3410 filter_test != FTEST_NONE || bi_option)
3413 smtp_input && (sender_address != NULL || filter_test != FTEST_NONE ||
3417 deliver_selectstring != NULL && queue_interval < 0
3420 msg_action == MSG_LOAD &&
3421 (!expansion_test || expansion_test_message != NULL)
3425 fprintf(stderr, "exim: incompatible command-line options or arguments\n");
3429 /* If debugging is set up, set the file and the file descriptor to pass on to
3430 child processes. It should, of course, be 2 for stderr. Also, force the daemon
3431 to run in the foreground. */
3433 if (debug_selector != 0)
3435 debug_file = stderr;
3436 debug_fd = fileno(debug_file);
3437 background_daemon = FALSE;
3438 if (running_in_test_harness) millisleep(100); /* lets caller finish */
3439 if (debug_selector != D_v) /* -v only doesn't show this */
3441 debug_printf("Exim version %s uid=%ld gid=%ld pid=%d D=%x\n",
3442 version_string, (long int)real_uid, (long int)real_gid, (int)getpid(),
3444 if (!version_printed)
3445 show_whats_supported(stderr);
3449 /* When started with root privilege, ensure that the limits on the number of
3450 open files and the number of processes (where that is accessible) are
3451 sufficiently large, or are unset, in case Exim has been called from an
3452 environment where the limits are screwed down. Not all OS have the ability to
3453 change some of these limits. */
3457 DEBUG(D_any) debug_print_ids(US"Exim has no root privilege:");
3463 #ifdef RLIMIT_NOFILE
3464 if (getrlimit(RLIMIT_NOFILE, &rlp) < 0)
3466 log_write(0, LOG_MAIN|LOG_PANIC, "getrlimit(RLIMIT_NOFILE) failed: %s",
3468 rlp.rlim_cur = rlp.rlim_max = 0;
3471 /* I originally chose 1000 as a nice big number that was unlikely to
3472 be exceeded. It turns out that some older OS have a fixed upper limit of
3475 if (rlp.rlim_cur < 1000)
3477 rlp.rlim_cur = rlp.rlim_max = 1000;
3478 if (setrlimit(RLIMIT_NOFILE, &rlp) < 0)
3480 rlp.rlim_cur = rlp.rlim_max = 256;
3481 if (setrlimit(RLIMIT_NOFILE, &rlp) < 0)
3482 log_write(0, LOG_MAIN|LOG_PANIC, "setrlimit(RLIMIT_NOFILE) failed: %s",
3489 if (getrlimit(RLIMIT_NPROC, &rlp) < 0)
3491 log_write(0, LOG_MAIN|LOG_PANIC, "getrlimit(RLIMIT_NPROC) failed: %s",
3493 rlp.rlim_cur = rlp.rlim_max = 0;
3496 #ifdef RLIM_INFINITY
3497 if (rlp.rlim_cur != RLIM_INFINITY && rlp.rlim_cur < 1000)
3499 rlp.rlim_cur = rlp.rlim_max = RLIM_INFINITY;
3501 if (rlp.rlim_cur < 1000)
3503 rlp.rlim_cur = rlp.rlim_max = 1000;
3505 if (setrlimit(RLIMIT_NPROC, &rlp) < 0)
3506 log_write(0, LOG_MAIN|LOG_PANIC, "setrlimit(RLIMIT_NPROC) failed: %s",
3512 /* Exim is normally entered as root (but some special configurations are
3513 possible that don't do this). However, it always spins off sub-processes that
3514 set their uid and gid as required for local delivery. We don't want to pass on
3515 any extra groups that root may belong to, so we want to get rid of them all at
3518 We need to obey setgroups() at this stage, before possibly giving up root
3519 privilege for a changed configuration file, but later on we might need to
3520 check on the additional groups for the admin user privilege - can't do that
3521 till after reading the config, which might specify the exim gid. Therefore,
3522 save the group list here first. */
3524 group_count = getgroups(NGROUPS_MAX, group_list);
3525 if (group_count < 0)
3527 fprintf(stderr, "exim: getgroups() failed: %s\n", strerror(errno));
3531 /* There is a fundamental difference in some BSD systems in the matter of
3532 groups. FreeBSD and BSDI are known to be different; NetBSD and OpenBSD are
3533 known not to be different. On the "different" systems there is a single group
3534 list, and the first entry in it is the current group. On all other versions of
3535 Unix there is a supplementary group list, which is in *addition* to the current
3536 group. Consequently, to get rid of all extraneous groups on a "standard" system
3537 you pass over 0 groups to setgroups(), while on a "different" system you pass
3538 over a single group - the current group, which is always the first group in the
3539 list. Calling setgroups() with zero groups on a "different" system results in
3540 an error return. The following code should cope with both types of system.
3542 However, if this process isn't running as root, setgroups() can't be used
3543 since you have to be root to run it, even if throwing away groups. Not being
3544 root here happens only in some unusual configurations. We just ignore the
3547 if (setgroups(0, NULL) != 0)
3549 if (setgroups(1, group_list) != 0 && !unprivileged)
3551 fprintf(stderr, "exim: setgroups() failed: %s\n", strerror(errno));
3556 /* If the configuration file name has been altered by an argument on the
3557 command line (either a new file name or a macro definition) and the caller is
3558 not root, or if this is a filter testing run, remove any setuid privilege the
3559 program has and run as the underlying user.
3561 The exim user is locked out of this, which severely restricts the use of -C
3564 Otherwise, set the real ids to the effective values (should be root unless run
3565 from inetd, which it can either be root or the exim uid, if one is configured).
3567 There is a private mechanism for bypassing some of this, in order to make it
3568 possible to test lots of configurations automatically, without having either to
3569 recompile each time, or to patch in an actual configuration file name and other
3570 values (such as the path name). If running in the test harness, pretend that
3571 configuration file changes and macro definitions haven't happened. */
3574 (!trusted_config || /* Config changed, or */
3575 !macros_trusted()) && /* impermissible macros and */
3576 real_uid != root_uid && /* Not root, and */
3577 !running_in_test_harness /* Not fudged */
3579 expansion_test /* expansion testing */
3581 filter_test != FTEST_NONE) /* Filter testing */
3583 setgroups(group_count, group_list);
3584 exim_setugid(real_uid, real_gid, FALSE,
3585 US"-C, -D, -be or -bf forces real uid");
3586 removed_privilege = TRUE;
3588 /* In the normal case when Exim is called like this, stderr is available
3589 and should be used for any logging information because attempts to write
3590 to the log will usually fail. To arrange this, we unset really_exim. However,
3591 if no stderr is available there is no point - we might as well have a go
3592 at the log (if it fails, syslog will be written).
3594 Note that if the invoker is Exim, the logs remain available. Messing with
3595 this causes unlogged successful deliveries. */
3597 if ((log_stderr != NULL) && (real_uid != exim_uid))
3598 really_exim = FALSE;
3601 /* Privilege is to be retained for the moment. It may be dropped later,
3602 depending on the job that this Exim process has been asked to do. For now, set
3603 the real uid to the effective so that subsequent re-execs of Exim are done by a
3606 else exim_setugid(geteuid(), getegid(), FALSE, US"forcing real = effective");
3608 /* If testing a filter, open the file(s) now, before wasting time doing other
3609 setups and reading the message. */
3611 if ((filter_test & FTEST_SYSTEM) != 0)
3613 filter_sfd = Uopen(filter_test_sfile, O_RDONLY, 0);
3616 fprintf(stderr, "exim: failed to open %s: %s\n", filter_test_sfile,
3618 return EXIT_FAILURE;
3622 if ((filter_test & FTEST_USER) != 0)
3624 filter_ufd = Uopen(filter_test_ufile, O_RDONLY, 0);
3627 fprintf(stderr, "exim: failed to open %s: %s\n", filter_test_ufile,
3629 return EXIT_FAILURE;
3633 /* Initialise lookup_list
3634 If debugging, already called above via version reporting.
3635 In either case, we initialise the list of available lookups while running
3636 as root. All dynamically modules are loaded from a directory which is
3637 hard-coded into the binary and is code which, if not a module, would be
3638 part of Exim already. Ability to modify the content of the directory
3639 is equivalent to the ability to modify a setuid binary!
3641 This needs to happen before we read the main configuration. */
3644 /* Read the main runtime configuration data; this gives up if there
3645 is a failure. It leaves the configuration file open so that the subsequent
3646 configuration data for delivery can be read if needed. */
3650 /* If an action on specific messages is requested, or if a daemon or queue
3651 runner is being started, we need to know if Exim was called by an admin user.
3652 This is the case if the real user is root or exim, or if the real group is
3653 exim, or if one of the supplementary groups is exim or a group listed in
3654 admin_groups. We don't fail all message actions immediately if not admin_user,
3655 since some actions can be performed by non-admin users. Instead, set admin_user
3656 for later interrogation. */
3658 if (real_uid == root_uid || real_uid == exim_uid || real_gid == exim_gid)
3663 for (i = 0; i < group_count; i++)
3665 if (group_list[i] == exim_gid) admin_user = TRUE;
3666 else if (admin_groups != NULL)
3668 for (j = 1; j <= (int)(admin_groups[0]); j++)
3669 if (admin_groups[j] == group_list[i])
3670 { admin_user = TRUE; break; }
3672 if (admin_user) break;
3676 /* Another group of privileged users are the trusted users. These are root,
3677 exim, and any caller matching trusted_users or trusted_groups. Trusted callers
3678 are permitted to specify sender_addresses with -f on the command line, and
3679 other message parameters as well. */
3681 if (real_uid == root_uid || real_uid == exim_uid)
3682 trusted_caller = TRUE;
3687 if (trusted_users != NULL)
3689 for (i = 1; i <= (int)(trusted_users[0]); i++)
3690 if (trusted_users[i] == real_uid)
3691 { trusted_caller = TRUE; break; }
3694 if (!trusted_caller && trusted_groups != NULL)
3696 for (i = 1; i <= (int)(trusted_groups[0]); i++)
3698 if (trusted_groups[i] == real_gid)
3699 trusted_caller = TRUE;
3700 else for (j = 0; j < group_count; j++)
3702 if (trusted_groups[i] == group_list[j])
3703 { trusted_caller = TRUE; break; }
3705 if (trusted_caller) break;
3710 /* Handle the decoding of logging options. */
3712 decode_bits(&log_write_selector, &log_extra_selector, 0, 0,
3713 log_selector_string, log_options, log_options_count, US"log", 0);
3717 debug_printf("configuration file is %s\n", config_main_filename);
3718 debug_printf("log selectors = %08x %08x\n", log_write_selector,
3719 log_extra_selector);
3722 /* If domain literals are not allowed, check the sender address that was
3723 supplied with -f. Ditto for a stripped trailing dot. */
3725 if (sender_address != NULL)
3727 if (sender_address[sender_address_domain] == '[' && !allow_domain_literals)
3729 fprintf(stderr, "exim: bad -f address \"%s\": domain literals not "
3730 "allowed\n", sender_address);
3731 return EXIT_FAILURE;
3733 if (f_end_dot && !strip_trailing_dot)
3735 fprintf(stderr, "exim: bad -f address \"%s.\": domain is malformed "
3736 "(trailing dot not allowed)\n", sender_address);
3737 return EXIT_FAILURE;
3741 /* See if an admin user overrode our logging. */
3743 if (cmdline_syslog_name != NULL)
3747 syslog_processname = cmdline_syslog_name;
3748 log_file_path = string_copy(CUS"syslog");
3752 /* not a panic, non-privileged users should not be able to spam paniclog */
3754 "exim: you lack sufficient privilege to specify syslog process name\n");
3755 return EXIT_FAILURE;
3759 /* Paranoia check of maximum lengths of certain strings. There is a check
3760 on the length of the log file path in log.c, which will come into effect
3761 if there are any calls to write the log earlier than this. However, if we
3762 get this far but the string is very long, it is better to stop now than to
3763 carry on and (e.g.) receive a message and then have to collapse. The call to
3764 log_write() from here will cause the ultimate panic collapse if the complete
3765 file name exceeds the buffer length. */
3767 if (Ustrlen(log_file_path) > 200)
3768 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3769 "log_file_path is longer than 200 chars: aborting");
3771 if (Ustrlen(pid_file_path) > 200)
3772 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3773 "pid_file_path is longer than 200 chars: aborting");
3775 if (Ustrlen(spool_directory) > 200)
3776 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3777 "spool_directory is longer than 200 chars: aborting");
3779 /* Length check on the process name given to syslog for its TAG field,
3780 which is only permitted to be 32 characters or less. See RFC 3164. */
3782 if (Ustrlen(syslog_processname) > 32)
3783 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3784 "syslog_processname is longer than 32 chars: aborting");
3786 /* In some operating systems, the environment variable TMPDIR controls where
3787 temporary files are created; Exim doesn't use these (apart from when delivering
3788 to MBX mailboxes), but called libraries such as DBM libraries may require them.
3789 If TMPDIR is found in the environment, reset it to the value defined in the
3790 TMPDIR macro, if this macro is defined. */
3795 for (p = USS environ; *p != NULL; p++)
3797 if (Ustrncmp(*p, "TMPDIR=", 7) == 0 &&
3798 Ustrcmp(*p+7, TMPDIR) != 0)
3800 uschar *newp = malloc(Ustrlen(TMPDIR) + 8);
3801 sprintf(CS newp, "TMPDIR=%s", TMPDIR);
3803 DEBUG(D_any) debug_printf("reset TMPDIR=%s in environment\n", TMPDIR);
3809 /* Timezone handling. If timezone_string is "utc", set a flag to cause all
3810 timestamps to be in UTC (gmtime() is used instead of localtime()). Otherwise,
3811 we may need to get rid of a bogus timezone setting. This can arise when Exim is
3812 called by a user who has set the TZ variable. This then affects the timestamps
3813 in log files and in Received: headers, and any created Date: header lines. The
3814 required timezone is settable in the configuration file, so nothing can be done
3815 about this earlier - but hopefully nothing will normally be logged earlier than
3816 this. We have to make a new environment if TZ is wrong, but don't bother if
3817 timestamps_utc is set, because then all times are in UTC anyway. */
3819 if (timezone_string != NULL && strcmpic(timezone_string, US"UTC") == 0)
3821 timestamps_utc = TRUE;
3825 uschar *envtz = US getenv("TZ");
3826 if ((envtz == NULL && timezone_string != NULL) ||
3828 (timezone_string == NULL ||
3829 Ustrcmp(timezone_string, envtz) != 0)))
3831 uschar **p = USS environ;
3835 while (*p++ != NULL) count++;
3836 if (envtz == NULL) count++;
3837 newp = new = malloc(sizeof(uschar *) * (count + 1));
3838 for (p = USS environ; *p != NULL; p++)
3840 if (Ustrncmp(*p, "TZ=", 3) == 0) continue;
3843 if (timezone_string != NULL)
3845 *newp = malloc(Ustrlen(timezone_string) + 4);
3846 sprintf(CS *newp++, "TZ=%s", timezone_string);
3851 DEBUG(D_any) debug_printf("Reset TZ to %s: time is %s\n", timezone_string,
3852 tod_stamp(tod_log));
3856 /* Handle the case when we have removed the setuid privilege because of -C or
3857 -D. This means that the caller of Exim was not root.
3859 There is a problem if we were running as the Exim user. The sysadmin may
3860 expect this case to retain privilege because "the binary was called by the
3861 Exim user", but it hasn't, because either the -D option set macros, or the
3862 -C option set a non-trusted configuration file. There are two possibilities:
3864 (1) If deliver_drop_privilege is set, Exim is not going to re-exec in order
3865 to do message deliveries. Thus, the fact that it is running as a
3866 non-privileged user is plausible, and might be wanted in some special
3867 configurations. However, really_exim will have been set false when
3868 privilege was dropped, to stop Exim trying to write to its normal log
3869 files. Therefore, re-enable normal log processing, assuming the sysadmin
3870 has set up the log directory correctly.
3872 (2) If deliver_drop_privilege is not set, the configuration won't work as
3873 apparently intended, and so we log a panic message. In order to retain
3874 root for -C or -D, the caller must either be root or be invoking a
3875 trusted configuration file (when deliver_drop_privilege is false). */
3877 if (removed_privilege && (!trusted_config || macros != NULL) &&
3878 real_uid == exim_uid)
3880 if (deliver_drop_privilege)
3881 really_exim = TRUE; /* let logging work normally */
3883 log_write(0, LOG_MAIN|LOG_PANIC,
3884 "exim user lost privilege for using %s option",
3885 trusted_config? "-D" : "-C");
3888 /* Start up Perl interpreter if Perl support is configured and there is a
3889 perl_startup option, and the configuration or the command line specifies
3890 initializing starting. Note that the global variables are actually called
3891 opt_perl_xxx to avoid clashing with perl's namespace (perl_*). */
3894 if (perl_start_option != 0)
3895 opt_perl_at_start = (perl_start_option > 0);
3896 if (opt_perl_at_start && opt_perl_startup != NULL)
3899 DEBUG(D_any) debug_printf("Starting Perl interpreter\n");
3900 errstr = init_perl(opt_perl_startup);
3903 fprintf(stderr, "exim: error in perl_startup code: %s\n", errstr);
3904 return EXIT_FAILURE;
3906 opt_perl_started = TRUE;
3908 #endif /* EXIM_PERL */
3910 /* Log the arguments of the call if the configuration file said so. This is
3911 a debugging feature for finding out what arguments certain MUAs actually use.
3912 Don't attempt it if logging is disabled, or if listing variables or if
3913 verifying/testing addresses or expansions. */
3915 if (((debug_selector & D_any) != 0 || (log_extra_selector & LX_arguments) != 0)
3916 && really_exim && !list_options && !checking)
3919 uschar *p = big_buffer;
3921 Ustrcpy(p, "cwd= (failed)");
3922 dummy = /* quieten compiler */ getcwd(CS p+4, big_buffer_size - 4);
3924 (void)string_format(p, big_buffer_size - (p - big_buffer), " %d args:", argc);
3926 for (i = 0; i < argc; i++)
3928 int len = Ustrlen(argv[i]);
3931 if (p + len + 8 >= big_buffer + big_buffer_size)
3934 log_write(0, LOG_MAIN, "%s", big_buffer);
3935 Ustrcpy(big_buffer, "...");
3938 printing = string_printing(argv[i]);
3939 if (printing[0] == 0) quote = US"\""; else
3941 uschar *pp = printing;
3943 while (*pp != 0) if (isspace(*pp++)) { quote = US"\""; break; }
3945 sprintf(CS p, " %s%.*s%s", quote, (int)(big_buffer_size -
3946 (p - big_buffer) - 4), printing, quote);
3950 if ((log_extra_selector & LX_arguments) != 0)
3951 log_write(0, LOG_MAIN, "%s", big_buffer);
3953 debug_printf("%s\n", big_buffer);
3956 /* Set the working directory to be the top-level spool directory. We don't rely
3957 on this in the code, which always uses fully qualified names, but it's useful
3958 for core dumps etc. Don't complain if it fails - the spool directory might not
3959 be generally accessible and calls with the -C option (and others) have lost
3960 privilege by now. Before the chdir, we try to ensure that the directory exists.
3963 if (Uchdir(spool_directory) != 0)
3966 (void)directory_make(spool_directory, US"", SPOOL_DIRECTORY_MODE, FALSE);
3967 dummy = /* quieten compiler */ Uchdir(spool_directory);
3970 /* Handle calls with the -bi option. This is a sendmail option to rebuild *the*
3971 alias file. Exim doesn't have such a concept, but this call is screwed into
3972 Sun's YP makefiles. Handle this by calling a configured script, as the real
3973 user who called Exim. The -oA option can be used to pass an argument to the
3978 (void)fclose(config_file);
3979 if (bi_command != NULL)
3983 argv[i++] = bi_command;
3984 if (alias_arg != NULL) argv[i++] = alias_arg;
3987 setgroups(group_count, group_list);
3988 exim_setugid(real_uid, real_gid, FALSE, US"running bi_command");
3990 DEBUG(D_exec) debug_printf("exec %.256s %.256s\n", argv[0],
3991 (argv[1] == NULL)? US"" : argv[1]);
3993 execv(CS argv[0], (char *const *)argv);
3994 fprintf(stderr, "exim: exec failed: %s\n", strerror(errno));
3999 DEBUG(D_any) debug_printf("-bi used but bi_command not set; exiting\n");
4004 /* We moved the admin/trusted check to be immediately after reading the
4005 configuration file. We leave these prints here to ensure that syslog setup,
4006 logfile setup, and so on has already happened. */
4008 if (trusted_caller) DEBUG(D_any) debug_printf("trusted user\n");
4009 if (admin_user) DEBUG(D_any) debug_printf("admin user\n");
4011 /* Only an admin user may start the daemon or force a queue run in the default
4012 configuration, but the queue run restriction can be relaxed. Only an admin
4013 user may request that a message be returned to its sender forthwith. Only an
4014 admin user may specify a debug level greater than D_v (because it might show
4015 passwords, etc. in lookup queries). Only an admin user may request a queue
4016 count. Only an admin user can use the test interface to scan for email
4017 (because Exim will be in the spool dir and able to look at mails). */
4021 BOOL debugset = (debug_selector & ~D_v) != 0;
4022 if (deliver_give_up || daemon_listen || malware_test_file ||
4023 (count_queue && queue_list_requires_admin) ||
4024 (list_queue && queue_list_requires_admin) ||
4025 (queue_interval >= 0 && prod_requires_admin) ||
4026 (debugset && !running_in_test_harness))
4028 fprintf(stderr, "exim:%s permission denied\n", debugset? " debugging" : "");
4033 /* If the real user is not root or the exim uid, the argument for passing
4034 in an open TCP/IP connection for another message is not permitted, nor is
4035 running with the -N option for any delivery action, unless this call to exim is
4036 one that supplied an input message, or we are using a patched exim for
4037 regression testing. */
4039 if (real_uid != root_uid && real_uid != exim_uid &&
4040 (continue_hostname != NULL ||
4042 (queue_interval >= 0 || daemon_listen || msg_action_arg > 0)
4043 )) && !running_in_test_harness)
4045 fprintf(stderr, "exim: Permission denied\n");
4046 return EXIT_FAILURE;
4049 /* If the caller is not trusted, certain arguments are ignored when running for
4050 real, but are permitted when checking things (-be, -bv, -bt, -bh, -bf, -bF).
4051 Note that authority for performing certain actions on messages is tested in the
4052 queue_action() function. */
4054 if (!trusted_caller && !checking && filter_test == FTEST_NONE)
4056 sender_host_name = sender_host_address = interface_address =
4057 sender_ident = received_protocol = NULL;
4058 sender_host_port = interface_port = 0;
4059 sender_host_authenticated = authenticated_sender = authenticated_id = NULL;
4062 /* If a sender host address is set, extract the optional port number off the
4063 end of it and check its syntax. Do the same thing for the interface address.
4064 Exim exits if the syntax is bad. */
4068 if (sender_host_address != NULL)
4069 sender_host_port = check_port(sender_host_address);
4070 if (interface_address != NULL)
4071 interface_port = check_port(interface_address);
4074 /* If the caller is trusted, then they can use -G to suppress_local_fixups. */
4079 suppress_local_fixups = suppress_local_fixups_default = TRUE;
4080 DEBUG(D_acl) debug_printf("suppress_local_fixups forced on by -G\n");
4084 fprintf(stderr, "exim: permission denied (-G requires a trusted user)\n");
4085 return EXIT_FAILURE;
4089 /* If an SMTP message is being received check to see if the standard input is a
4090 TCP/IP socket. If it is, we assume that Exim was called from inetd if the
4091 caller is root or the Exim user, or if the port is a privileged one. Otherwise,
4096 union sockaddr_46 inetd_sock;
4097 EXIM_SOCKLEN_T size = sizeof(inetd_sock);
4098 if (getpeername(0, (struct sockaddr *)(&inetd_sock), &size) == 0)
4100 int family = ((struct sockaddr *)(&inetd_sock))->sa_family;
4101 if (family == AF_INET || family == AF_INET6)
4103 union sockaddr_46 interface_sock;
4104 size = sizeof(interface_sock);
4106 if (getsockname(0, (struct sockaddr *)(&interface_sock), &size) == 0)
4107 interface_address = host_ntoa(-1, &interface_sock, NULL,
4110 if (host_is_tls_on_connect_port(interface_port)) tls_in.on_connect = TRUE;
4112 if (real_uid == root_uid || real_uid == exim_uid || interface_port < 1024)
4115 sender_host_address = host_ntoa(-1, (struct sockaddr *)(&inetd_sock),
4116 NULL, &sender_host_port);
4117 if (mua_wrapper) log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Input from "
4118 "inetd is not supported when mua_wrapper is set");
4123 "exim: Permission denied (unprivileged user, unprivileged port)\n");
4124 return EXIT_FAILURE;
4130 /* If the load average is going to be needed while receiving a message, get it
4131 now for those OS that require the first call to os_getloadavg() to be done as
4132 root. There will be further calls later for each message received. */
4134 #ifdef LOAD_AVG_NEEDS_ROOT
4135 if (receiving_message &&
4136 (queue_only_load >= 0 ||
4137 (is_inetd && smtp_load_reserve >= 0)
4140 load_average = OS_GETLOADAVG();
4144 /* The queue_only configuration option can be overridden by -odx on the command
4145 line, except that if queue_only_override is false, queue_only cannot be unset
4146 from the command line. */
4148 if (queue_only_set && (queue_only_override || arg_queue_only))
4149 queue_only = arg_queue_only;
4151 /* The receive_timeout and smtp_receive_timeout options can be overridden by
4154 if (arg_receive_timeout >= 0) receive_timeout = arg_receive_timeout;
4155 if (arg_smtp_receive_timeout >= 0)
4156 smtp_receive_timeout = arg_smtp_receive_timeout;
4158 /* If Exim was started with root privilege, unless we have already removed the
4159 root privilege above as a result of -C, -D, -be, -bf or -bF, remove it now
4160 except when starting the daemon or doing some kind of delivery or address
4161 testing (-bt). These are the only cases when root need to be retained. We run
4162 as exim for -bv and -bh. However, if deliver_drop_privilege is set, root is
4163 retained only for starting the daemon. We always do the initgroups() in this
4164 situation (controlled by the TRUE below), in order to be as close as possible
4165 to the state Exim usually runs in. */
4167 if (!unprivileged && /* originally had root AND */
4168 !removed_privilege && /* still got root AND */
4169 !daemon_listen && /* not starting the daemon */
4170 queue_interval <= 0 && /* (either kind of daemon) */
4172 deliver_drop_privilege || /* requested unprivileged */
4174 queue_interval < 0 && /* not running the queue */
4175 (msg_action_arg < 0 || /* and */
4176 msg_action != MSG_DELIVER) && /* not delivering and */
4177 (!checking || !address_test_mode) /* not address checking */
4181 exim_setugid(exim_uid, exim_gid, TRUE, US"privilege not needed");
4184 /* When we are retaining a privileged uid, we still change to the exim gid. */
4189 rv = setgid(exim_gid);
4190 /* Impact of failure is that some stuff might end up with an incorrect group.
4191 We track this for failures from root, since any attempt to change privilege
4192 by root should succeed and failures should be examined. For non-root,
4193 there's no security risk. For me, it's { exim -bV } on a just-built binary,
4194 no need to complain then. */
4197 if (!(unprivileged || removed_privilege))
4200 "exim: changing group failed: %s\n", strerror(errno));
4204 DEBUG(D_any) debug_printf("changing group to %ld failed: %s\n",
4205 (long int)exim_gid, strerror(errno));
4209 /* Handle a request to scan a file for malware */
4210 if (malware_test_file)
4212 #ifdef WITH_CONTENT_SCAN
4214 set_process_info("scanning file for malware");
4215 result = malware_in_file(malware_test_file);
4218 printf("No malware found.\n");
4223 printf("Malware lookup returned non-okay/fail: %d\n", result);
4227 printf("Malware found: %s\n", malware_name);
4229 printf("Malware scan detected malware of unknown name.\n");
4231 printf("Malware scanning not enabled at compile time.\n");
4236 /* Handle a request to list the delivery queue */
4240 set_process_info("listing the queue");
4241 queue_list(list_queue_option, argv + recipients_arg, argc - recipients_arg);
4245 /* Handle a request to count the delivery queue */
4249 set_process_info("counting the queue");
4254 /* Handle actions on specific messages, except for the force delivery and
4255 message load actions, which are done below. Some actions take a whole list of
4256 message ids, which are known to continue up to the end of the arguments. Others
4257 take a single message id and then operate on the recipients list. */
4259 if (msg_action_arg > 0 && msg_action != MSG_DELIVER && msg_action != MSG_LOAD)
4261 int yield = EXIT_SUCCESS;
4262 set_process_info("acting on specified messages");
4264 if (!one_msg_action)
4266 for (i = msg_action_arg; i < argc; i++)
4267 if (!queue_action(argv[i], msg_action, NULL, 0, 0))
4268 yield = EXIT_FAILURE;
4271 else if (!queue_action(argv[msg_action_arg], msg_action, argv, argc,
4272 recipients_arg)) yield = EXIT_FAILURE;
4276 /* We used to set up here to skip reading the ACL section, on
4277 (msg_action_arg > 0 || (queue_interval == 0 && !daemon_listen)
4278 Now, since the intro of the ${acl } expansion, ACL definitions may be
4279 needed in transports so we lost the optimisation. */
4283 /* The configuration data will have been read into POOL_PERM because we won't
4284 ever want to reset back past it. Change the current pool to POOL_MAIN. In fact,
4285 this is just a bit of pedantic tidiness. It wouldn't really matter if the
4286 configuration were read into POOL_MAIN, because we don't do any resets till
4287 later on. However, it seems right, and it does ensure that both pools get used.
4290 store_pool = POOL_MAIN;
4292 /* Handle the -brt option. This is for checking out retry configurations.
4293 The next three arguments are a domain name or a complete address, and
4294 optionally two error numbers. All it does is to call the function that
4295 scans the retry configuration data. */
4297 if (test_retry_arg >= 0)
4299 retry_config *yield;
4300 int basic_errno = 0;
4304 if (test_retry_arg >= argc)
4306 printf("-brt needs a domain or address argument\n");
4307 exim_exit(EXIT_FAILURE);
4309 s1 = argv[test_retry_arg++];
4312 /* If the first argument contains no @ and no . it might be a local user
4313 or it might be a single-component name. Treat as a domain. */
4315 if (Ustrchr(s1, '@') == NULL && Ustrchr(s1, '.') == NULL)
4317 printf("Warning: \"%s\" contains no '@' and no '.' characters. It is "
4318 "being \ntreated as a one-component domain, not as a local part.\n\n",
4322 /* There may be an optional second domain arg. */
4324 if (test_retry_arg < argc && Ustrchr(argv[test_retry_arg], '.') != NULL)
4325 s2 = argv[test_retry_arg++];
4327 /* The final arg is an error name */
4329 if (test_retry_arg < argc)
4331 uschar *ss = argv[test_retry_arg];
4333 readconf_retry_error(ss, ss + Ustrlen(ss), &basic_errno, &more_errno);
4336 printf("%s\n", CS error);
4337 return EXIT_FAILURE;
4340 /* For the {MAIL,RCPT,DATA}_4xx errors, a value of 255 means "any", and a
4341 code > 100 as an error is for matching codes to the decade. Turn them into
4342 a real error code, off the decade. */
4344 if (basic_errno == ERRNO_MAIL4XX ||
4345 basic_errno == ERRNO_RCPT4XX ||
4346 basic_errno == ERRNO_DATA4XX)
4348 int code = (more_errno >> 8) & 255;
4350 more_errno = (more_errno & 0xffff00ff) | (21 << 8);
4351 else if (code > 100)
4352 more_errno = (more_errno & 0xffff00ff) | ((code - 96) << 8);
4356 yield = retry_find_config(s1, s2, basic_errno, more_errno);
4357 if (yield == NULL) printf("No retry information found\n"); else
4360 more_errno = yield->more_errno;
4361 printf("Retry rule: %s ", yield->pattern);
4363 if (yield->basic_errno == ERRNO_EXIMQUOTA)
4365 printf("quota%s%s ",
4366 (more_errno > 0)? "_" : "",
4367 (more_errno > 0)? readconf_printtime(more_errno) : US"");
4369 else if (yield->basic_errno == ECONNREFUSED)
4371 printf("refused%s%s ",
4372 (more_errno > 0)? "_" : "",
4373 (more_errno == 'M')? "MX" :
4374 (more_errno == 'A')? "A" : "");
4376 else if (yield->basic_errno == ETIMEDOUT)
4379 if ((more_errno & RTEF_CTOUT) != 0) printf("_connect");
4381 if (more_errno != 0) printf("_%s",
4382 (more_errno == 'M')? "MX" : "A");
4385 else if (yield->basic_errno == ERRNO_AUTHFAIL)
4386 printf("auth_failed ");
4389 for (r = yield->rules; r != NULL; r = r->next)
4391 printf("%c,%s", r->rule, readconf_printtime(r->timeout)); /* Do not */
4392 printf(",%s", readconf_printtime(r->p1)); /* amalgamate */
4398 printf(",%d.", x/1000);
4412 exim_exit(EXIT_SUCCESS);
4415 /* Handle a request to list one or more configuration options */
4416 /* If -n was set, we suppress some information */
4420 set_process_info("listing variables");
4421 if (recipients_arg >= argc) readconf_print(US"all", NULL, flag_n);
4422 else for (i = recipients_arg; i < argc; i++)
4425 (Ustrcmp(argv[i], "router") == 0 ||
4426 Ustrcmp(argv[i], "transport") == 0 ||
4427 Ustrcmp(argv[i], "authenticator") == 0 ||
4428 Ustrcmp(argv[i], "macro") == 0))
4430 readconf_print(argv[i+1], argv[i], flag_n);
4433 else readconf_print(argv[i], NULL, flag_n);
4435 exim_exit(EXIT_SUCCESS);
4439 /* Handle a request to deliver one or more messages that are already on the
4440 queue. Values of msg_action other than MSG_DELIVER and MSG_LOAD are dealt with
4441 above. MSG_LOAD is handled with -be (which is the only time it applies) below.
4443 Delivery of specific messages is typically used for a small number when
4444 prodding by hand (when the option forced_delivery will be set) or when
4445 re-execing to regain root privilege. Each message delivery must happen in a
4446 separate process, so we fork a process for each one, and run them sequentially
4447 so that debugging output doesn't get intertwined, and to avoid spawning too
4448 many processes if a long list is given. However, don't fork for the last one;
4449 this saves a process in the common case when Exim is called to deliver just one
4452 if (msg_action_arg > 0 && msg_action != MSG_LOAD)
4454 if (prod_requires_admin && !admin_user)
4456 fprintf(stderr, "exim: Permission denied\n");
4457 exim_exit(EXIT_FAILURE);
4459 set_process_info("delivering specified messages");
4460 if (deliver_give_up) forced_delivery = deliver_force_thaw = TRUE;
4461 for (i = msg_action_arg; i < argc; i++)
4466 (void)deliver_message(argv[i], forced_delivery, deliver_give_up);
4467 else if ((pid = fork()) == 0)
4469 (void)deliver_message(argv[i], forced_delivery, deliver_give_up);
4470 _exit(EXIT_SUCCESS);
4474 fprintf(stderr, "failed to fork delivery process for %s: %s\n", argv[i],
4476 exim_exit(EXIT_FAILURE);
4480 exim_exit(EXIT_SUCCESS);
4484 /* If only a single queue run is requested, without SMTP listening, we can just
4485 turn into a queue runner, with an optional starting message id. */
4487 if (queue_interval == 0 && !daemon_listen)
4489 DEBUG(D_queue_run) debug_printf("Single queue run%s%s%s%s\n",
4490 (start_queue_run_id == NULL)? US"" : US" starting at ",
4491 (start_queue_run_id == NULL)? US"" : start_queue_run_id,
4492 (stop_queue_run_id == NULL)? US"" : US" stopping at ",
4493 (stop_queue_run_id == NULL)? US"" : stop_queue_run_id);
4494 set_process_info("running the queue (single queue run)");
4495 queue_run(start_queue_run_id, stop_queue_run_id, FALSE);
4496 exim_exit(EXIT_SUCCESS);
4500 /* Find the login name of the real user running this process. This is always
4501 needed when receiving a message, because it is written into the spool file. It
4502 may also be used to construct a from: or a sender: header, and in this case we
4503 need the user's full name as well, so save a copy of it, checked for RFC822
4504 syntax and munged if necessary, if it hasn't previously been set by the -F
4505 argument. We may try to get the passwd entry more than once, in case NIS or
4506 other delays are in evidence. Save the home directory for use in filter testing
4511 if ((pw = getpwuid(real_uid)) != NULL)
4513 originator_login = string_copy(US pw->pw_name);
4514 originator_home = string_copy(US pw->pw_dir);
4516 /* If user name has not been set by -F, set it from the passwd entry
4517 unless -f has been used to set the sender address by a trusted user. */
4519 if (originator_name == NULL)
4521 if (sender_address == NULL ||
4522 (!trusted_caller && filter_test == FTEST_NONE))
4524 uschar *name = US pw->pw_gecos;
4525 uschar *amp = Ustrchr(name, '&');
4528 /* Most Unix specify that a '&' character in the gecos field is
4529 replaced by a copy of the login name, and some even specify that
4530 the first character should be upper cased, so that's what we do. */
4535 string_format(buffer, sizeof(buffer), "%.*s%n%s%s",
4536 amp - name, name, &loffset, originator_login, amp + 1);
4537 buffer[loffset] = toupper(buffer[loffset]);
4541 /* If a pattern for matching the gecos field was supplied, apply
4542 it and then expand the name string. */
4544 if (gecos_pattern != NULL && gecos_name != NULL)
4547 re = regex_must_compile(gecos_pattern, FALSE, TRUE); /* Use malloc */
4549 if (regex_match_and_setup(re, name, 0, -1))
4551 uschar *new_name = expand_string(gecos_name);
4553 if (new_name != NULL)
4555 DEBUG(D_receive) debug_printf("user name \"%s\" extracted from "
4556 "gecos field \"%s\"\n", new_name, name);
4559 else DEBUG(D_receive) debug_printf("failed to expand gecos_name string "
4560 "\"%s\": %s\n", gecos_name, expand_string_message);
4562 else DEBUG(D_receive) debug_printf("gecos_pattern \"%s\" did not match "
4563 "gecos field \"%s\"\n", gecos_pattern, name);
4564 store_free((void *)re);
4566 originator_name = string_copy(name);
4569 /* A trusted caller has used -f but not -F */
4571 else originator_name = US"";
4574 /* Break the retry loop */
4579 if (++i > finduser_retries) break;
4583 /* If we cannot get a user login, log the incident and give up, unless the
4584 configuration specifies something to use. When running in the test harness,
4585 any setting of unknown_login overrides the actual name. */
4587 if (originator_login == NULL || running_in_test_harness)
4589 if (unknown_login != NULL)
4591 originator_login = expand_string(unknown_login);
4592 if (originator_name == NULL && unknown_username != NULL)
4593 originator_name = expand_string(unknown_username);
4594 if (originator_name == NULL) originator_name = US"";
4596 if (originator_login == NULL)
4597 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Failed to get user name for uid %d",
4601 /* Ensure that the user name is in a suitable form for use as a "phrase" in an
4604 originator_name = string_copy(parse_fix_phrase(originator_name,
4605 Ustrlen(originator_name), big_buffer, big_buffer_size));
4607 /* If a message is created by this call of Exim, the uid/gid of its originator
4608 are those of the caller. These values are overridden if an existing message is
4609 read in from the spool. */
4611 originator_uid = real_uid;
4612 originator_gid = real_gid;
4614 DEBUG(D_receive) debug_printf("originator: uid=%d gid=%d login=%s name=%s\n",
4615 (int)originator_uid, (int)originator_gid, originator_login, originator_name);
4617 /* Run in daemon and/or queue-running mode. The function daemon_go() never
4618 returns. We leave this till here so that the originator_ fields are available
4619 for incoming messages via the daemon. The daemon cannot be run in mua_wrapper
4622 if (daemon_listen || inetd_wait_mode || queue_interval > 0)
4626 fprintf(stderr, "Daemon cannot be run when mua_wrapper is set\n");
4627 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Daemon cannot be run when "
4628 "mua_wrapper is set");
4633 /* If the sender ident has not been set (by a trusted caller) set it to
4634 the caller. This will get overwritten below for an inetd call. If a trusted
4635 caller has set it empty, unset it. */
4637 if (sender_ident == NULL) sender_ident = originator_login;
4638 else if (sender_ident[0] == 0) sender_ident = NULL;
4640 /* Handle the -brw option, which is for checking out rewriting rules. Cause log
4641 writes (on errors) to go to stderr instead. Can't do this earlier, as want the
4642 originator_* variables set. */
4644 if (test_rewrite_arg >= 0)
4646 really_exim = FALSE;
4647 if (test_rewrite_arg >= argc)
4649 printf("-brw needs an address argument\n");
4650 exim_exit(EXIT_FAILURE);
4652 rewrite_test(argv[test_rewrite_arg]);
4653 exim_exit(EXIT_SUCCESS);
4656 /* A locally-supplied message is considered to be coming from a local user
4657 unless a trusted caller supplies a sender address with -f, or is passing in the
4658 message via SMTP (inetd invocation or otherwise). */
4660 if ((sender_address == NULL && !smtp_input) ||
4661 (!trusted_caller && filter_test == FTEST_NONE))
4663 sender_local = TRUE;
4665 /* A trusted caller can supply authenticated_sender and authenticated_id
4666 via -oMas and -oMai and if so, they will already be set. Otherwise, force
4667 defaults except when host checking. */
4669 if (authenticated_sender == NULL && !host_checking)
4670 authenticated_sender = string_sprintf("%s@%s", originator_login,
4671 qualify_domain_sender);
4672 if (authenticated_id == NULL && !host_checking)
4673 authenticated_id = originator_login;
4676 /* Trusted callers are always permitted to specify the sender address.
4677 Untrusted callers may specify it if it matches untrusted_set_sender, or if what
4678 is specified is the empty address. However, if a trusted caller does not
4679 specify a sender address for SMTP input, we leave sender_address unset. This
4680 causes the MAIL commands to be honoured. */
4682 if ((!smtp_input && sender_address == NULL) ||
4683 !receive_check_set_sender(sender_address))
4685 /* Either the caller is not permitted to set a general sender, or this is
4686 non-SMTP input and the trusted caller has not set a sender. If there is no
4687 sender, or if a sender other than <> is set, override with the originator's
4688 login (which will get qualified below), except when checking things. */
4690 if (sender_address == NULL /* No sender_address set */
4692 (sender_address[0] != 0 && /* Non-empty sender address, AND */
4693 !checking && /* Not running tests, AND */
4694 filter_test == FTEST_NONE)) /* Not testing a filter */
4696 sender_address = originator_login;
4697 sender_address_forced = FALSE;
4698 sender_address_domain = 0;
4702 /* Remember whether an untrusted caller set the sender address */
4704 sender_set_untrusted = sender_address != originator_login && !trusted_caller;
4706 /* Ensure that the sender address is fully qualified unless it is the empty
4707 address, which indicates an error message, or doesn't exist (root caller, smtp
4708 interface, no -f argument). */
4710 if (sender_address != NULL && sender_address[0] != 0 &&
4711 sender_address_domain == 0)
4712 sender_address = string_sprintf("%s@%s", local_part_quote(sender_address),
4713 qualify_domain_sender);
4715 DEBUG(D_receive) debug_printf("sender address = %s\n", sender_address);
4717 /* Handle a request to verify a list of addresses, or test them for delivery.
4718 This must follow the setting of the sender address, since routers can be
4719 predicated upon the sender. If no arguments are given, read addresses from
4720 stdin. Set debug_level to at least D_v to get full output for address testing.
4723 if (verify_address_mode || address_test_mode)
4726 int flags = vopt_qualify;
4728 if (verify_address_mode)
4730 if (!verify_as_sender) flags |= vopt_is_recipient;
4731 DEBUG(D_verify) debug_print_ids(US"Verifying:");
4736 flags |= vopt_is_recipient;
4737 debug_selector |= D_v;
4738 debug_file = stderr;
4739 debug_fd = fileno(debug_file);
4740 DEBUG(D_verify) debug_print_ids(US"Address testing:");
4743 if (recipients_arg < argc)
4745 while (recipients_arg < argc)
4747 uschar *s = argv[recipients_arg++];
4750 BOOL finished = FALSE;
4751 uschar *ss = parse_find_address_end(s, FALSE);
4752 if (*ss == ',') *ss = 0; else finished = TRUE;
4753 test_address(s, flags, &exit_value);
4756 while (*(++s) != 0 && (*s == ',' || isspace(*s)));
4763 uschar *s = get_stdinput(NULL, NULL);
4764 if (s == NULL) break;
4765 test_address(s, flags, &exit_value);
4769 exim_exit(exit_value);
4772 /* Handle expansion checking. Either expand items on the command line, or read
4773 from stdin if there aren't any. If -Mset was specified, load the message so
4774 that its variables can be used, but restrict this facility to admin users.
4775 Otherwise, if -bem was used, read a message from stdin. */
4779 if (msg_action_arg > 0 && msg_action == MSG_LOAD)
4781 uschar spoolname[256]; /* Not big_buffer; used in spool_read_header() */
4784 fprintf(stderr, "exim: permission denied\n");
4787 message_id = argv[msg_action_arg];
4788 (void)string_format(spoolname, sizeof(spoolname), "%s-H", message_id);
4789 if (!spool_open_datafile(message_id))
4790 printf ("Failed to load message datafile %s\n", message_id);
4791 if (spool_read_header(spoolname, TRUE, FALSE) != spool_read_OK)
4792 printf ("Failed to load message %s\n", message_id);
4795 /* Read a test message from a file. We fudge it up to be on stdin, saving
4796 stdin itself for later reading of expansion strings. */
4798 else if (expansion_test_message != NULL)
4800 int save_stdin = dup(0);
4801 int fd = Uopen(expansion_test_message, O_RDONLY, 0);
4804 fprintf(stderr, "exim: failed to open %s: %s\n", expansion_test_message,
4806 return EXIT_FAILURE;
4809 filter_test = FTEST_USER; /* Fudge to make it look like filter test */
4810 message_ended = END_NOTENDED;
4811 read_message_body(receive_msg(extract_recipients));
4812 message_linecount += body_linecount;
4813 (void)dup2(save_stdin, 0);
4814 (void)close(save_stdin);
4815 clearerr(stdin); /* Required by Darwin */
4818 /* Allow $recipients for this testing */
4820 enable_dollar_recipients = TRUE;
4822 /* Expand command line items */
4824 if (recipients_arg < argc)
4826 while (recipients_arg < argc)
4828 uschar *s = argv[recipients_arg++];
4829 uschar *ss = expand_string(s);
4830 if (ss == NULL) printf ("Failed: %s\n", expand_string_message);
4831 else printf("%s\n", CS ss);
4839 char *(*fn_readline)(const char *) = NULL;
4840 void (*fn_addhist)(const char *) = NULL;
4843 void *dlhandle = set_readline(&fn_readline, &fn_addhist);
4849 uschar *source = get_stdinput(fn_readline, fn_addhist);
4850 if (source == NULL) break;
4851 ss = expand_string(source);
4853 printf ("Failed: %s\n", expand_string_message);
4854 else printf("%s\n", CS ss);
4858 if (dlhandle != NULL) dlclose(dlhandle);
4862 /* The data file will be open after -Mset */
4864 if (deliver_datafile >= 0)
4866 (void)close(deliver_datafile);
4867 deliver_datafile = -1;
4870 exim_exit(EXIT_SUCCESS);
4874 /* The active host name is normally the primary host name, but it can be varied
4875 for hosts that want to play several parts at once. We need to ensure that it is
4876 set for host checking, and for receiving messages. */
4878 smtp_active_hostname = primary_hostname;
4879 if (raw_active_hostname != NULL)
4881 uschar *nah = expand_string(raw_active_hostname);
4884 if (!expand_string_forcedfail)
4885 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to expand \"%s\" "
4886 "(smtp_active_hostname): %s", raw_active_hostname,
4887 expand_string_message);
4889 else if (nah[0] != 0) smtp_active_hostname = nah;
4892 /* Handle host checking: this facility mocks up an incoming SMTP call from a
4893 given IP address so that the blocking and relay configuration can be tested.
4894 Unless a sender_ident was set by -oMt, we discard it (the default is the
4895 caller's login name). An RFC 1413 call is made only if we are running in the
4896 test harness and an incoming interface and both ports are specified, because
4897 there is no TCP/IP call to find the ident for. */
4904 if (!sender_ident_set)
4906 sender_ident = NULL;
4907 if (running_in_test_harness && sender_host_port != 0 &&
4908 interface_address != NULL && interface_port != 0)
4909 verify_get_ident(1413);
4912 /* In case the given address is a non-canonical IPv6 address, canonicize
4913 it. The code works for both IPv4 and IPv6, as it happens. */
4915 size = host_aton(sender_host_address, x);
4916 sender_host_address = store_get(48); /* large enough for full IPv6 */
4917 (void)host_nmtoa(size, x, -1, sender_host_address, ':');
4919 /* Now set up for testing */
4921 host_build_sender_fullhost();
4925 sender_local = FALSE;
4926 sender_host_notsocket = TRUE;
4927 debug_file = stderr;
4928 debug_fd = fileno(debug_file);
4929 fprintf(stdout, "\n**** SMTP testing session as if from host %s\n"
4930 "**** but without any ident (RFC 1413) callback.\n"
4931 "**** This is not for real!\n\n",
4932 sender_host_address);
4934 if (verify_check_host(&hosts_connection_nolog) == OK)
4935 log_write_selector &= ~L_smtp_connection;
4936 log_write(L_smtp_connection, LOG_MAIN, "%s", smtp_get_connection_info());
4938 /* NOTE: We do *not* call smtp_log_no_mail() if smtp_start_session() fails,
4939 because a log line has already been written for all its failure exists
4940 (usually "connection refused: <reason>") and writing another one is
4941 unnecessary clutter. */
4943 if (smtp_start_session())
4945 reset_point = store_get(0);
4948 store_reset(reset_point);
4949 if (smtp_setup_msg() <= 0) break;
4950 if (!receive_msg(FALSE)) break;
4954 exim_exit(EXIT_SUCCESS);
4958 /* Arrange for message reception if recipients or SMTP were specified;
4959 otherwise complain unless a version print (-bV) happened or this is a filter
4960 verification test or info dump.
4961 In the former case, show the configuration file name. */
4963 if (recipients_arg >= argc && !extract_recipients && !smtp_input)
4965 if (version_printed)
4967 printf("Configuration file is %s\n", config_main_filename);
4968 return EXIT_SUCCESS;
4971 if (info_flag != CMDINFO_NONE)
4973 show_exim_information(info_flag, info_stdout ? stdout : stderr);
4974 return info_stdout ? EXIT_SUCCESS : EXIT_FAILURE;
4977 if (filter_test == FTEST_NONE)
4978 exim_usage(called_as);
4982 /* If mua_wrapper is set, Exim is being used to turn an MUA that submits on the
4983 standard input into an MUA that submits to a smarthost over TCP/IP. We know
4984 that we are not called from inetd, because that is rejected above. The
4985 following configuration settings are forced here:
4987 (1) Synchronous delivery (-odi)
4988 (2) Errors to stderr (-oep == -oeq)
4989 (3) No parallel remote delivery
4990 (4) Unprivileged delivery
4992 We don't force overall queueing options because there are several of them;
4993 instead, queueing is avoided below when mua_wrapper is set. However, we do need
4994 to override any SMTP queueing. */
4998 synchronous_delivery = TRUE;
4999 arg_error_handling = ERRORS_STDERR;
5000 remote_max_parallel = 1;
5001 deliver_drop_privilege = TRUE;
5003 queue_smtp_domains = NULL;
5007 /* Prepare to accept one or more new messages on the standard input. When a
5008 message has been read, its id is returned in message_id[]. If doing immediate
5009 delivery, we fork a delivery process for each received message, except for the
5010 last one, where we can save a process switch.
5012 It is only in non-smtp mode that error_handling is allowed to be changed from
5013 its default of ERRORS_SENDER by argument. (Idle thought: are any of the
5014 sendmail error modes other than -oem ever actually used? Later: yes.) */
5016 if (!smtp_input) error_handling = arg_error_handling;
5018 /* If this is an inetd call, ensure that stderr is closed to prevent panic
5019 logging being sent down the socket and make an identd call to get the
5024 (void)fclose(stderr);
5025 exim_nullstd(); /* Re-open to /dev/null */
5026 verify_get_ident(IDENT_PORT);
5027 host_build_sender_fullhost();
5028 set_process_info("handling incoming connection from %s via inetd",
5032 /* If the sender host address has been set, build sender_fullhost if it hasn't
5033 already been done (which it will have been for inetd). This caters for the
5034 case when it is forced by -oMa. However, we must flag that it isn't a socket,
5035 so that the test for IP options is skipped for -bs input. */
5037 if (sender_host_address != NULL && sender_fullhost == NULL)
5039 host_build_sender_fullhost();
5040 set_process_info("handling incoming connection from %s via -oMa",
5042 sender_host_notsocket = TRUE;
5045 /* Otherwise, set the sender host as unknown except for inetd calls. This
5046 prevents host checking in the case of -bs not from inetd and also for -bS. */
5048 else if (!is_inetd) sender_host_unknown = TRUE;
5050 /* If stdout does not exist, then dup stdin to stdout. This can happen
5051 if exim is started from inetd. In this case fd 0 will be set to the socket,
5052 but fd 1 will not be set. This also happens for passed SMTP channels. */
5054 if (fstat(1, &statbuf) < 0) (void)dup2(0, 1);
5056 /* Set up the incoming protocol name and the state of the program. Root is
5057 allowed to force received protocol via the -oMr option above. If we have come
5058 via inetd, the process info has already been set up. We don't set
5059 received_protocol here for smtp input, as it varies according to
5060 batch/HELO/EHLO/AUTH/TLS. */
5064 if (!is_inetd) set_process_info("accepting a local %sSMTP message from <%s>",
5065 smtp_batched_input? "batched " : "",
5066 (sender_address!= NULL)? sender_address : originator_login);
5070 if (received_protocol == NULL)
5071 received_protocol = string_sprintf("local%s", called_as);
5072 set_process_info("accepting a local non-SMTP message from <%s>",
5076 /* Initialize the session_local_queue-only flag (this will be ignored if
5077 mua_wrapper is set) */
5080 session_local_queue_only = queue_only;
5082 /* For non-SMTP and for batched SMTP input, check that there is enough space on
5083 the spool if so configured. On failure, we must not attempt to send an error
5084 message! (For interactive SMTP, the check happens at MAIL FROM and an SMTP
5085 error code is given.) */
5087 if ((!smtp_input || smtp_batched_input) && !receive_check_fs(0))
5089 fprintf(stderr, "exim: insufficient disk space\n");
5090 return EXIT_FAILURE;
5093 /* If this is smtp input of any kind, real or batched, handle the start of the
5096 NOTE: We do *not* call smtp_log_no_mail() if smtp_start_session() fails,
5097 because a log line has already been written for all its failure exists
5098 (usually "connection refused: <reason>") and writing another one is
5099 unnecessary clutter. */
5105 if (verify_check_host(&hosts_connection_nolog) == OK)
5106 log_write_selector &= ~L_smtp_connection;
5107 log_write(L_smtp_connection, LOG_MAIN, "%s", smtp_get_connection_info());
5108 if (!smtp_start_session())
5111 exim_exit(EXIT_SUCCESS);
5115 /* Otherwise, set up the input size limit here. */
5119 thismessage_size_limit = expand_string_integer(message_size_limit, TRUE);
5120 if (expand_string_message != NULL)
5122 if (thismessage_size_limit == -1)
5123 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to expand "
5124 "message_size_limit: %s", expand_string_message);
5126 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "invalid value for "
5127 "message_size_limit: %s", expand_string_message);
5131 /* Loop for several messages when reading SMTP input. If we fork any child
5132 processes, we don't want to wait for them unless synchronous delivery is
5133 requested, so set SIGCHLD to SIG_IGN in that case. This is not necessarily the
5134 same as SIG_DFL, despite the fact that documentation often lists the default as
5135 "ignore". This is a confusing area. This is what I know:
5137 At least on some systems (e.g. Solaris), just setting SIG_IGN causes child
5138 processes that complete simply to go away without ever becoming defunct. You
5139 can't then wait for them - but we don't want to wait for them in the
5140 non-synchronous delivery case. However, this behaviour of SIG_IGN doesn't
5141 happen for all OS (e.g. *BSD is different).
5143 But that's not the end of the story. Some (many? all?) systems have the
5144 SA_NOCLDWAIT option for sigaction(). This requests the behaviour that Solaris
5145 has by default, so it seems that the difference is merely one of default
5146 (compare restarting vs non-restarting signals).
5148 To cover all cases, Exim sets SIG_IGN with SA_NOCLDWAIT here if it can. If not,
5149 it just sets SIG_IGN. To be on the safe side it also calls waitpid() at the end
5150 of the loop below. Paranoia rules.
5152 February 2003: That's *still* not the end of the story. There are now versions
5153 of Linux (where SIG_IGN does work) that are picky. If, having set SIG_IGN, a
5154 process then calls waitpid(), a grumble is written to the system log, because
5155 this is logically inconsistent. In other words, it doesn't like the paranoia.
5156 As a consequenc of this, the waitpid() below is now excluded if we are sure
5157 that SIG_IGN works. */
5159 if (!synchronous_delivery)
5162 struct sigaction act;
5163 act.sa_handler = SIG_IGN;
5164 sigemptyset(&(act.sa_mask));
5165 act.sa_flags = SA_NOCLDWAIT;
5166 sigaction(SIGCHLD, &act, NULL);
5168 signal(SIGCHLD, SIG_IGN);
5172 /* Save the current store pool point, for resetting at the start of
5173 each message, and save the real sender address, if any. */
5175 reset_point = store_get(0);
5176 real_sender_address = sender_address;
5178 /* Loop to receive messages; receive_msg() returns TRUE if there are more
5179 messages to be read (SMTP input), or FALSE otherwise (not SMTP, or SMTP channel
5184 store_reset(reset_point);
5187 /* Handle the SMTP case; call smtp_setup_mst() to deal with the initial SMTP
5188 input and build the recipients list, before calling receive_msg() to read the
5189 message proper. Whatever sender address is given in the SMTP transaction is
5190 often ignored for local senders - we use the actual sender, which is normally
5191 either the underlying user running this process or a -f argument provided by
5192 a trusted caller. It is saved in real_sender_address. The test for whether to
5193 accept the SMTP sender is encapsulated in receive_check_set_sender(). */
5198 if ((rc = smtp_setup_msg()) > 0)
5200 if (real_sender_address != NULL &&
5201 !receive_check_set_sender(sender_address))
5203 sender_address = raw_sender = real_sender_address;
5204 sender_address_unrewritten = NULL;
5207 /* For batched SMTP, we have to run the acl_not_smtp_start ACL, since it
5208 isn't really SMTP, so no other ACL will run until the acl_not_smtp one at
5209 the very end. The result of the ACL is ignored (as for other non-SMTP
5210 messages). It is run for its potential side effects. */
5212 if (smtp_batched_input && acl_not_smtp_start != NULL)
5214 uschar *user_msg, *log_msg;
5215 enable_dollar_recipients = TRUE;
5216 (void)acl_check(ACL_WHERE_NOTSMTP_START, NULL, acl_not_smtp_start,
5217 &user_msg, &log_msg);
5218 enable_dollar_recipients = FALSE;
5221 /* Now get the data for the message */
5223 more = receive_msg(extract_recipients);
5224 if (message_id[0] == 0)
5227 smtp_log_no_mail(); /* Log no mail if configured */
5228 exim_exit(EXIT_FAILURE);
5233 smtp_log_no_mail(); /* Log no mail if configured */
5234 exim_exit((rc == 0)? EXIT_SUCCESS : EXIT_FAILURE);
5238 /* In the non-SMTP case, we have all the information from the command
5239 line, but must process it in case it is in the more general RFC822
5240 format, and in any case, to detect syntax errors. Also, it appears that
5241 the use of comma-separated lists as single arguments is common, so we
5242 had better support them. */
5248 int count = argc - recipients_arg;
5249 uschar **list = argv + recipients_arg;
5251 /* These options cannot be changed dynamically for non-SMTP messages */
5253 active_local_sender_retain = local_sender_retain;
5254 active_local_from_check = local_from_check;
5256 /* Save before any rewriting */
5258 raw_sender = string_copy(sender_address);
5260 /* Loop for each argument */
5262 for (i = 0; i < count; i++)
5264 int start, end, domain;
5266 uschar *s = list[i];
5268 /* Loop for each comma-separated address */
5272 BOOL finished = FALSE;
5274 uschar *ss = parse_find_address_end(s, FALSE);
5276 if (*ss == ',') *ss = 0; else finished = TRUE;
5278 /* Check max recipients - if -t was used, these aren't recipients */
5280 if (recipients_max > 0 && ++rcount > recipients_max &&
5281 !extract_recipients)
5283 if (error_handling == ERRORS_STDERR)
5285 fprintf(stderr, "exim: too many recipients\n");
5286 exim_exit(EXIT_FAILURE);
5291 moan_to_sender(ERRMESS_TOOMANYRECIP, NULL, NULL, stdin, TRUE)?
5292 errors_sender_rc : EXIT_FAILURE;
5297 parse_extract_address(s, &errmess, &start, &end, &domain, FALSE);
5299 if (domain == 0 && !allow_unqualified_recipient)
5302 errmess = US"unqualified recipient address not allowed";
5305 if (recipient == NULL)
5307 if (error_handling == ERRORS_STDERR)
5309 fprintf(stderr, "exim: bad recipient address \"%s\": %s\n",
5310 string_printing(list[i]), errmess);
5311 exim_exit(EXIT_FAILURE);
5317 eblock.text1 = string_printing(list[i]);
5318 eblock.text2 = errmess;
5320 moan_to_sender(ERRMESS_BADARGADDRESS, &eblock, NULL, stdin, TRUE)?
5321 errors_sender_rc : EXIT_FAILURE;
5325 receive_add_recipient(recipient, -1);
5328 while (*(++s) != 0 && (*s == ',' || isspace(*s)));
5332 /* Show the recipients when debugging */
5337 if (sender_address != NULL) debug_printf("Sender: %s\n", sender_address);
5338 if (recipients_list != NULL)
5340 debug_printf("Recipients:\n");
5341 for (i = 0; i < recipients_count; i++)
5342 debug_printf(" %s\n", recipients_list[i].address);
5346 /* Run the acl_not_smtp_start ACL if required. The result of the ACL is
5347 ignored; rejecting here would just add complication, and it can just as
5348 well be done later. Allow $recipients to be visible in the ACL. */
5350 if (acl_not_smtp_start != NULL)
5352 uschar *user_msg, *log_msg;
5353 enable_dollar_recipients = TRUE;
5354 (void)acl_check(ACL_WHERE_NOTSMTP_START, NULL, acl_not_smtp_start,
5355 &user_msg, &log_msg);
5356 enable_dollar_recipients = FALSE;
5359 /* Read the data for the message. If filter_test is not FTEST_NONE, this
5360 will just read the headers for the message, and not write anything onto the
5363 message_ended = END_NOTENDED;
5364 more = receive_msg(extract_recipients);
5366 /* more is always FALSE here (not SMTP message) when reading a message
5367 for real; when reading the headers of a message for filter testing,
5368 it is TRUE if the headers were terminated by '.' and FALSE otherwise. */
5370 if (message_id[0] == 0) exim_exit(EXIT_FAILURE);
5371 } /* Non-SMTP message reception */
5373 /* If this is a filter testing run, there are headers in store, but
5374 no message on the spool. Run the filtering code in testing mode, setting
5375 the domain to the qualify domain and the local part to the current user,
5376 unless they have been set by options. The prefix and suffix are left unset
5377 unless specified. The the return path is set to to the sender unless it has
5378 already been set from a return-path header in the message. */
5380 if (filter_test != FTEST_NONE)
5382 deliver_domain = (ftest_domain != NULL)?
5383 ftest_domain : qualify_domain_recipient;
5384 deliver_domain_orig = deliver_domain;
5385 deliver_localpart = (ftest_localpart != NULL)?
5386 ftest_localpart : originator_login;
5387 deliver_localpart_orig = deliver_localpart;
5388 deliver_localpart_prefix = ftest_prefix;
5389 deliver_localpart_suffix = ftest_suffix;
5390 deliver_home = originator_home;
5392 if (return_path == NULL)
5394 printf("Return-path copied from sender\n");
5395 return_path = string_copy(sender_address);
5399 printf("Return-path = %s\n", (return_path[0] == 0)? US"<>" : return_path);
5401 printf("Sender = %s\n", (sender_address[0] == 0)? US"<>" : sender_address);
5403 receive_add_recipient(
5404 string_sprintf("%s%s%s@%s",
5405 (ftest_prefix == NULL)? US"" : ftest_prefix,
5407 (ftest_suffix == NULL)? US"" : ftest_suffix,
5408 deliver_domain), -1);
5410 printf("Recipient = %s\n", recipients_list[0].address);
5411 if (ftest_prefix != NULL) printf("Prefix = %s\n", ftest_prefix);
5412 if (ftest_suffix != NULL) printf("Suffix = %s\n", ftest_suffix);
5414 if (chdir("/")) /* Get away from wherever the user is running this from */
5416 DEBUG(D_receive) debug_printf("chdir(\"/\") failed\n");
5417 exim_exit(EXIT_FAILURE);
5420 /* Now we run either a system filter test, or a user filter test, or both.
5421 In the latter case, headers added by the system filter will persist and be
5422 available to the user filter. We need to copy the filter variables
5425 if ((filter_test & FTEST_SYSTEM) != 0)
5427 if (!filter_runtest(filter_sfd, filter_test_sfile, TRUE, more))
5428 exim_exit(EXIT_FAILURE);
5431 memcpy(filter_sn, filter_n, sizeof(filter_sn));
5433 if ((filter_test & FTEST_USER) != 0)
5435 if (!filter_runtest(filter_ufd, filter_test_ufile, FALSE, more))
5436 exim_exit(EXIT_FAILURE);
5439 exim_exit(EXIT_SUCCESS);
5442 /* Else act on the result of message reception. We should not get here unless
5443 message_id[0] is non-zero. If queue_only is set, session_local_queue_only
5444 will be TRUE. If it is not, check on the number of messages received in this
5447 if (!session_local_queue_only &&
5448 smtp_accept_queue_per_connection > 0 &&
5449 receive_messagecount > smtp_accept_queue_per_connection)
5451 session_local_queue_only = TRUE;
5452 queue_only_reason = 2;
5455 /* Initialize local_queue_only from session_local_queue_only. If it is false,
5456 and queue_only_load is set, check that the load average is below it. If it is
5457 not, set local_queue_only TRUE. If queue_only_load_latch is true (the
5458 default), we put the whole session into queue_only mode. It then remains this
5459 way for any subsequent messages on the same SMTP connection. This is a
5460 deliberate choice; even though the load average may fall, it doesn't seem
5461 right to deliver later messages on the same call when not delivering earlier
5462 ones. However, there are odd cases where this is not wanted, so this can be
5463 changed by setting queue_only_load_latch false. */
5465 local_queue_only = session_local_queue_only;
5466 if (!local_queue_only && queue_only_load >= 0)
5468 local_queue_only = (load_average = OS_GETLOADAVG()) > queue_only_load;
5469 if (local_queue_only)
5471 queue_only_reason = 3;
5472 if (queue_only_load_latch) session_local_queue_only = TRUE;
5476 /* If running as an MUA wrapper, all queueing options and freezing options
5480 local_queue_only = queue_only_policy = deliver_freeze = FALSE;
5482 /* Log the queueing here, when it will get a message id attached, but
5483 not if queue_only is set (case 0). Case 1 doesn't happen here (too many
5486 if (local_queue_only) switch(queue_only_reason)
5489 log_write(L_delay_delivery,
5490 LOG_MAIN, "no immediate delivery: more than %d messages "
5491 "received in one connection", smtp_accept_queue_per_connection);
5495 log_write(L_delay_delivery,
5496 LOG_MAIN, "no immediate delivery: load average %.2f",
5497 (double)load_average/1000.0);
5501 /* Else do the delivery unless the ACL or local_scan() called for queue only
5502 or froze the message. Always deliver in a separate process. A fork failure is
5503 not a disaster, as the delivery will eventually happen on a subsequent queue
5504 run. The search cache must be tidied before the fork, as the parent will
5505 do it before exiting. The child will trigger a lookup failure and
5506 thereby defer the delivery if it tries to use (for example) a cached ldap
5507 connection that the parent has called unbind on. */
5509 else if (!queue_only_policy && !deliver_freeze)
5514 if ((pid = fork()) == 0)
5517 close_unwanted(); /* Close unwanted file descriptors and TLS */
5518 exim_nullstd(); /* Ensure std{in,out,err} exist */
5520 /* Re-exec Exim if we need to regain privilege (note: in mua_wrapper
5521 mode, deliver_drop_privilege is forced TRUE). */
5523 if (geteuid() != root_uid && !deliver_drop_privilege && !unprivileged)
5525 (void)child_exec_exim(CEE_EXEC_EXIT, FALSE, NULL, FALSE, 2, US"-Mc",
5527 /* Control does not return here. */
5530 /* No need to re-exec */
5532 rc = deliver_message(message_id, FALSE, FALSE);
5534 _exit((!mua_wrapper || rc == DELIVER_MUA_SUCCEEDED)?
5535 EXIT_SUCCESS : EXIT_FAILURE);
5540 log_write(0, LOG_MAIN|LOG_PANIC, "failed to fork automatic delivery "
5541 "process: %s", strerror(errno));
5544 /* In the parent, wait if synchronous delivery is required. This will
5545 always be the case in MUA wrapper mode. */
5547 else if (synchronous_delivery)
5550 while (wait(&status) != pid);
5551 if ((status & 0x00ff) != 0)
5552 log_write(0, LOG_MAIN|LOG_PANIC,
5553 "process %d crashed with signal %d while delivering %s",
5554 (int)pid, status & 0x00ff, message_id);
5555 if (mua_wrapper && (status & 0xffff) != 0) exim_exit(EXIT_FAILURE);
5559 /* The loop will repeat if more is TRUE. If we do not know know that the OS
5560 automatically reaps children (see comments above the loop), clear away any
5561 finished subprocesses here, in case there are lots of messages coming in
5562 from the same source. */
5564 #ifndef SIG_IGN_WORKS
5565 while (waitpid(-1, NULL, WNOHANG) > 0);
5569 exim_exit(EXIT_SUCCESS); /* Never returns */
5570 return 0; /* To stop compiler warning */