1 /*************************************************
2 * Exim - an Internet mail transport agent *
3 *************************************************/
5 /* Copyright (c) University of Cambridge 1995 - 2009 */
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 * Compile regular expression and panic on fail *
57 *************************************************/
59 /* This function is called when failure to compile a regular expression leads
60 to a panic exit. In other cases, pcre_compile() is called directly. In many
61 cases where this function is used, the results of the compilation are to be
62 placed in long-lived store, so we temporarily reset the store management
63 functions that PCRE uses if the use_malloc flag is set.
66 pattern the pattern to compile
67 caseless TRUE if caseless matching is required
68 use_malloc TRUE if compile into malloc store
70 Returns: pointer to the compiled pattern
74 regex_must_compile(uschar *pattern, BOOL caseless, BOOL use_malloc)
77 int options = PCRE_COPT;
82 pcre_malloc = function_store_malloc;
83 pcre_free = function_store_free;
85 if (caseless) options |= PCRE_CASELESS;
86 yield = pcre_compile(CS pattern, options, (const char **)&error, &offset, NULL);
87 pcre_malloc = function_store_get;
88 pcre_free = function_dummy_free;
90 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "regular expression error: "
91 "%s at offset %d while compiling %s", error, offset, pattern);
98 /*************************************************
99 * Execute regular expression and set strings *
100 *************************************************/
102 /* This function runs a regular expression match, and sets up the pointers to
103 the matched substrings.
106 re the compiled expression
107 subject the subject string
108 options additional PCRE options
109 setup if < 0 do full setup
110 if >= 0 setup from setup+1 onwards,
111 excluding the full matched string
113 Returns: TRUE or FALSE
117 regex_match_and_setup(const pcre *re, uschar *subject, int options, int setup)
119 int ovector[3*(EXPAND_MAXN+1)];
120 int n = pcre_exec(re, NULL, CS subject, Ustrlen(subject), 0,
121 PCRE_EOPT | options, ovector, sizeof(ovector)/sizeof(int));
123 if (n == 0) n = EXPAND_MAXN + 1;
127 expand_nmax = (setup < 0)? 0 : setup + 1;
128 for (nn = (setup < 0)? 0 : 2; nn < n*2; nn += 2)
130 expand_nstring[expand_nmax] = subject + ovector[nn];
131 expand_nlength[expand_nmax++] = ovector[nn+1] - ovector[nn];
141 /*************************************************
142 * Set up processing details *
143 *************************************************/
145 /* Save a text string for dumping when SIGUSR1 is received.
146 Do checks for overruns.
148 Arguments: format and arguments, as for printf()
153 set_process_info(const char *format, ...)
157 sprintf(CS process_info, "%5d ", (int)getpid());
158 len = Ustrlen(process_info);
159 va_start(ap, format);
160 if (!string_vformat(process_info + len, PROCESS_INFO_SIZE - len - 2, format, ap))
161 Ustrcpy(process_info + len, "**** string overflowed buffer ****");
162 len = Ustrlen(process_info);
163 process_info[len+0] = '\n';
164 process_info[len+1] = '\0';
165 process_info_len = len + 1;
166 DEBUG(D_process_info) debug_printf("set_process_info: %s", process_info);
173 /*************************************************
174 * Handler for SIGUSR1 *
175 *************************************************/
177 /* SIGUSR1 causes any exim process to write to the process log details of
178 what it is currently doing. It will only be used if the OS is capable of
179 setting up a handler that causes automatic restarting of any system call
180 that is in progress at the time.
182 This function takes care to be signal-safe.
184 Argument: the signal number (SIGUSR1)
189 usr1_handler(int sig)
193 os_restarting_signal(sig, usr1_handler);
195 fd = Uopen(process_log_path, O_APPEND|O_WRONLY, LOG_MODE);
198 /* If we are already running as the Exim user, try to create it in the
199 current process (assuming spool_directory exists). Otherwise, if we are
200 root, do the creation in an exim:exim subprocess. */
202 int euid = geteuid();
203 if (euid == exim_uid)
204 fd = Uopen(process_log_path, O_CREAT|O_APPEND|O_WRONLY, LOG_MODE);
205 else if (euid == root_uid)
206 fd = log_create_as_exim(process_log_path);
209 /* If we are neither exim nor root, or if we failed to create the log file,
210 give up. There is not much useful we can do with errors, since we don't want
211 to disrupt whatever is going on outside the signal handler. */
215 (void)write(fd, process_info, process_info_len);
221 /*************************************************
223 *************************************************/
225 /* This handler is enabled most of the time that Exim is running. The handler
226 doesn't actually get used unless alarm() has been called to set a timer, to
227 place a time limit on a system call of some kind. When the handler is run, it
230 There are some other SIGALRM handlers that are used in special cases when more
231 than just a flag setting is required; for example, when reading a message's
232 input. These are normally set up in the code module that uses them, and the
233 SIGALRM handler is reset to this one afterwards.
235 Argument: the signal value (SIGALRM)
240 sigalrm_handler(int sig)
242 sig = sig; /* Keep picky compilers happy */
244 os_non_restarting_signal(SIGALRM, sigalrm_handler);
249 /*************************************************
250 * Sleep for a fractional time interval *
251 *************************************************/
253 /* This function is called by millisleep() and exim_wait_tick() to wait for a
254 period of time that may include a fraction of a second. The coding is somewhat
255 tedious. We do not expect setitimer() ever to fail, but if it does, the process
256 will wait for ever, so we panic in this instance. (There was a case of this
257 when a bug in a function that calls milliwait() caused it to pass invalid data.
258 That's when I added the check. :-)
260 Argument: an itimerval structure containing the interval
265 milliwait(struct itimerval *itval)
268 sigset_t old_sigmask;
269 (void)sigemptyset(&sigmask); /* Empty mask */
270 (void)sigaddset(&sigmask, SIGALRM); /* Add SIGALRM */
271 (void)sigprocmask(SIG_BLOCK, &sigmask, &old_sigmask); /* Block SIGALRM */
272 if (setitimer(ITIMER_REAL, itval, NULL) < 0) /* Start timer */
273 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
274 "setitimer() failed: %s", strerror(errno));
275 (void)sigfillset(&sigmask); /* All signals */
276 (void)sigdelset(&sigmask, SIGALRM); /* Remove SIGALRM */
277 (void)sigsuspend(&sigmask); /* Until SIGALRM */
278 (void)sigprocmask(SIG_SETMASK, &old_sigmask, NULL); /* Restore mask */
284 /*************************************************
285 * Millisecond sleep function *
286 *************************************************/
288 /* The basic sleep() function has a granularity of 1 second, which is too rough
289 in some cases - for example, when using an increasing delay to slow down
292 Argument: number of millseconds
299 struct itimerval itval;
300 itval.it_interval.tv_sec = 0;
301 itval.it_interval.tv_usec = 0;
302 itval.it_value.tv_sec = msec/1000;
303 itval.it_value.tv_usec = (msec % 1000) * 1000;
309 /*************************************************
310 * Compare microsecond times *
311 *************************************************/
318 Returns: -1, 0, or +1
322 exim_tvcmp(struct timeval *t1, struct timeval *t2)
324 if (t1->tv_sec > t2->tv_sec) return +1;
325 if (t1->tv_sec < t2->tv_sec) return -1;
326 if (t1->tv_usec > t2->tv_usec) return +1;
327 if (t1->tv_usec < t2->tv_usec) return -1;
334 /*************************************************
335 * Clock tick wait function *
336 *************************************************/
338 /* Exim uses a time + a pid to generate a unique identifier in two places: its
339 message IDs, and in file names for maildir deliveries. Because some OS now
340 re-use pids within the same second, sub-second times are now being used.
341 However, for absolute certaintly, we must ensure the clock has ticked before
342 allowing the relevant process to complete. At the time of implementation of
343 this code (February 2003), the speed of processors is such that the clock will
344 invariably have ticked already by the time a process has done its job. This
345 function prepares for the time when things are faster - and it also copes with
346 clocks that go backwards.
349 then_tv A timeval which was used to create uniqueness; its usec field
350 has been rounded down to the value of the resolution.
351 We want to be sure the current time is greater than this.
352 resolution The resolution that was used to divide the microseconds
353 (1 for maildir, larger for message ids)
359 exim_wait_tick(struct timeval *then_tv, int resolution)
361 struct timeval now_tv;
362 long int now_true_usec;
364 (void)gettimeofday(&now_tv, NULL);
365 now_true_usec = now_tv.tv_usec;
366 now_tv.tv_usec = (now_true_usec/resolution) * resolution;
368 if (exim_tvcmp(&now_tv, then_tv) <= 0)
370 struct itimerval itval;
371 itval.it_interval.tv_sec = 0;
372 itval.it_interval.tv_usec = 0;
373 itval.it_value.tv_sec = then_tv->tv_sec - now_tv.tv_sec;
374 itval.it_value.tv_usec = then_tv->tv_usec + resolution - now_true_usec;
376 /* We know that, overall, "now" is less than or equal to "then". Therefore, a
377 negative value for the microseconds is possible only in the case when "now"
378 is more than a second less than "then". That means that itval.it_value.tv_sec
379 is greater than zero. The following correction is therefore safe. */
381 if (itval.it_value.tv_usec < 0)
383 itval.it_value.tv_usec += 1000000;
384 itval.it_value.tv_sec -= 1;
387 DEBUG(D_transport|D_receive)
389 if (!running_in_test_harness)
391 debug_printf("tick check: %lu.%06lu %lu.%06lu\n",
392 then_tv->tv_sec, then_tv->tv_usec, now_tv.tv_sec, now_tv.tv_usec);
393 debug_printf("waiting %lu.%06lu\n", itval.it_value.tv_sec,
394 itval.it_value.tv_usec);
405 /*************************************************
406 * Call fopen() with umask 777 and adjust mode *
407 *************************************************/
409 /* Exim runs with umask(0) so that files created with open() have the mode that
410 is specified in the open() call. However, there are some files, typically in
411 the spool directory, that are created with fopen(). They end up world-writeable
412 if no precautions are taken. Although the spool directory is not accessible to
413 the world, this is an untidiness. So this is a wrapper function for fopen()
414 that sorts out the mode of the created file.
417 filename the file name
418 options the fopen() options
419 mode the required mode
421 Returns: the fopened FILE or NULL
425 modefopen(const uschar *filename, const char *options, mode_t mode)
427 mode_t saved_umask = umask(0777);
428 FILE *f = Ufopen(filename, options);
429 (void)umask(saved_umask);
430 if (f != NULL) (void)fchmod(fileno(f), mode);
437 /*************************************************
438 * Ensure stdin, stdout, and stderr exist *
439 *************************************************/
441 /* Some operating systems grumble if an exec() happens without a standard
442 input, output, and error (fds 0, 1, 2) being defined. The worry is that some
443 file will be opened and will use these fd values, and then some other bit of
444 code will assume, for example, that it can write error messages to stderr.
445 This function ensures that fds 0, 1, and 2 are open if they do not already
446 exist, by connecting them to /dev/null.
448 This function is also used to ensure that std{in,out,err} exist at all times,
449 so that if any library that Exim calls tries to use them, it doesn't crash.
461 for (i = 0; i <= 2; i++)
463 if (fstat(i, &statbuf) < 0 && errno == EBADF)
465 if (devnull < 0) devnull = open("/dev/null", O_RDWR);
466 if (devnull < 0) log_write(0, LOG_MAIN|LOG_PANIC_DIE, "%s",
467 string_open_failed(errno, "/dev/null"));
468 if (devnull != i) (void)dup2(devnull, i);
471 if (devnull > 2) (void)close(devnull);
477 /*************************************************
478 * Close unwanted file descriptors for delivery *
479 *************************************************/
481 /* This function is called from a new process that has been forked to deliver
482 an incoming message, either directly, or using exec.
484 We want any smtp input streams to be closed in this new process. However, it
485 has been observed that using fclose() here causes trouble. When reading in -bS
486 input, duplicate copies of messages have been seen. The files will be sharing a
487 file pointer with the parent process, and it seems that fclose() (at least on
488 some systems - I saw this on Solaris 2.5.1) messes with that file pointer, at
489 least sometimes. Hence we go for closing the underlying file descriptors.
491 If TLS is active, we want to shut down the TLS library, but without molesting
492 the parent's SSL connection.
494 For delivery of a non-SMTP message, we want to close stdin and stdout (and
495 stderr unless debugging) because the calling process might have set them up as
496 pipes and be waiting for them to close before it waits for the submission
497 process to terminate. If they aren't closed, they hold up the calling process
498 until the initial delivery process finishes, which is not what we want.
500 Exception: We do want it for synchronous delivery!
502 And notwithstanding all the above, if D_resolver is set, implying resolver
503 debugging, leave stdout open, because that's where the resolver writes its
506 When we close stderr (which implies we've also closed stdout), we also get rid
507 of any controlling terminal.
519 tls_close(FALSE); /* Shut down the TLS library */
521 (void)close(fileno(smtp_in));
522 (void)close(fileno(smtp_out));
527 (void)close(0); /* stdin */
528 if ((debug_selector & D_resolver) == 0) (void)close(1); /* stdout */
529 if (debug_selector == 0) /* stderr */
531 if (!synchronous_delivery)
544 /*************************************************
546 *************************************************/
548 /* This function sets a new uid and gid permanently, optionally calling
549 initgroups() to set auxiliary groups. There are some special cases when running
550 Exim in unprivileged modes. In these situations the effective uid will not be
551 root; if we already have the right effective uid/gid, and don't need to
552 initialize any groups, leave things as they are.
557 igflag TRUE if initgroups() wanted
558 msg text to use in debugging output and failure log
560 Returns: nothing; bombs out on failure
564 exim_setugid(uid_t uid, gid_t gid, BOOL igflag, uschar *msg)
566 uid_t euid = geteuid();
567 gid_t egid = getegid();
569 if (euid == root_uid || euid != uid || egid != gid || igflag)
571 /* At least one OS returns +1 for initgroups failure, so just check for
576 struct passwd *pw = getpwuid(uid);
579 if (initgroups(pw->pw_name, gid) != 0)
580 log_write(0,LOG_MAIN|LOG_PANIC_DIE,"initgroups failed for uid=%ld: %s",
581 (long int)uid, strerror(errno));
583 else log_write(0, LOG_MAIN|LOG_PANIC_DIE, "cannot run initgroups(): "
584 "no passwd entry for uid=%ld", (long int)uid);
587 if (setgid(gid) < 0 || setuid(uid) < 0)
589 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "unable to set gid=%ld or uid=%ld "
590 "(euid=%ld): %s", (long int)gid, (long int)uid, (long int)euid, msg);
594 /* Debugging output included uid/gid and all groups */
598 int group_count, save_errno;
599 gid_t group_list[NGROUPS_MAX];
600 debug_printf("changed uid/gid: %s\n uid=%ld gid=%ld pid=%ld\n", msg,
601 (long int)geteuid(), (long int)getegid(), (long int)getpid());
602 group_count = getgroups(NGROUPS_MAX, group_list);
604 debug_printf(" auxiliary group list:");
608 for (i = 0; i < group_count; i++) debug_printf(" %d", (int)group_list[i]);
610 else if (group_count < 0)
611 debug_printf(" <error: %s>", strerror(save_errno));
612 else debug_printf(" <none>");
620 /*************************************************
622 *************************************************/
624 /* Exim exits via this function so that it always clears up any open
630 Returns: does not return
638 debug_printf(">>>>>>>>>>>>>>>> Exim pid=%d terminating with rc=%d "
639 ">>>>>>>>>>>>>>>>\n", (int)getpid(), rc);
646 /*************************************************
647 * Extract port from host address *
648 *************************************************/
650 /* Called to extract the port from the values given to -oMa and -oMi.
651 It also checks the syntax of the address, and terminates it before the
652 port data when a port is extracted.
655 address the address, with possible port on the end
657 Returns: the port, or zero if there isn't one
658 bombs out on a syntax error
662 check_port(uschar *address)
664 int port = host_address_extract_port(address);
665 if (string_is_ip_address(address, NULL) == 0)
667 fprintf(stderr, "exim abandoned: \"%s\" is not an IP address\n", address);
675 /*************************************************
676 * Test/verify an address *
677 *************************************************/
679 /* This function is called by the -bv and -bt code. It extracts a working
680 address from a full RFC 822 address. This isn't really necessary per se, but it
681 has the effect of collapsing source routes.
685 flags flag bits for verify_address()
686 exit_value to be set for failures
692 test_address(uschar *s, int flags, int *exit_value)
694 int start, end, domain;
695 uschar *parse_error = NULL;
696 uschar *address = parse_extract_address(s, &parse_error, &start, &end, &domain,
700 fprintf(stdout, "syntax error: %s\n", parse_error);
705 int rc = verify_address(deliver_make_addr(address,TRUE), stdout, flags, -1,
706 -1, -1, NULL, NULL, NULL);
707 if (rc == FAIL) *exit_value = 2;
708 else if (rc == DEFER && *exit_value == 0) *exit_value = 1;
714 /*************************************************
715 * Show supported features *
716 *************************************************/
718 /* This function is called for -bV/--version and for -d to output the optional
719 features of the current Exim binary.
721 Arguments: a FILE for printing
726 show_whats_supported(FILE *f)
730 #ifdef DB_VERSION_STRING
731 fprintf(f, "Berkeley DB: %s\n", DB_VERSION_STRING);
732 #elif defined(BTREEVERSION) && defined(HASHVERSION)
734 fprintf(f, "Probably Berkeley DB version 1.8x (native mode)\n");
736 fprintf(f, "Probably Berkeley DB version 1.8x (compatibility mode)\n");
738 #elif defined(_DBM_RDONLY) || defined(dbm_dirfno)
739 fprintf(f, "Probably ndbm\n");
740 #elif defined(USE_TDB)
741 fprintf(f, "Using tdb\n");
744 fprintf(f, "Probably GDBM (native mode)\n");
746 fprintf(f, "Probably GDBM (compatibility mode)\n");
750 fprintf(f, "Support for:");
751 #ifdef SUPPORT_CRYPTEQ
752 fprintf(f, " crypteq");
755 fprintf(f, " iconv()");
760 #ifdef HAVE_SETCLASSRESOURCES
761 fprintf(f, " use_setclassresources");
770 fprintf(f, " Expand_dlfunc");
772 #ifdef USE_TCP_WRAPPERS
773 fprintf(f, " TCPwrappers");
777 fprintf(f, " GnuTLS");
779 fprintf(f, " OpenSSL");
782 #ifdef SUPPORT_TRANSLATE_IP_ADDRESS
783 fprintf(f, " translate_ip_address");
785 #ifdef SUPPORT_MOVE_FROZEN_MESSAGES
786 fprintf(f, " move_frozen_messages");
788 #ifdef WITH_CONTENT_SCAN
789 fprintf(f, " Content_Scanning");
794 #ifdef WITH_OLD_DEMIME
795 fprintf(f, " Old_Demime");
797 #ifdef EXPERIMENTAL_SPF
798 fprintf(f, " Experimental_SPF");
800 #ifdef EXPERIMENTAL_SRS
801 fprintf(f, " Experimental_SRS");
803 #ifdef EXPERIMENTAL_BRIGHTMAIL
804 fprintf(f, " Experimental_Brightmail");
806 #ifdef EXPERIMENTAL_DCC
807 fprintf(f, " Experimental_DCC");
811 fprintf(f, "Lookups (built-in):");
812 #if defined(LOOKUP_LSEARCH) && LOOKUP_LSEARCH!=2
813 fprintf(f, " lsearch wildlsearch nwildlsearch iplsearch");
815 #if defined(LOOKUP_CDB) && LOOKUP_CDB!=2
818 #if defined(LOOKUP_DBM) && LOOKUP_DBM!=2
819 fprintf(f, " dbm dbmnz");
821 #if defined(LOOKUP_DNSDB) && LOOKUP_DNSDB!=2
822 fprintf(f, " dnsdb");
824 #if defined(LOOKUP_DSEARCH) && LOOKUP_DSEARCH!=2
825 fprintf(f, " dsearch");
827 #if defined(LOOKUP_IBASE) && LOOKUP_IBASE!=2
828 fprintf(f, " ibase");
830 #if defined(LOOKUP_LDAP) && LOOKUP_LDAP!=2
831 fprintf(f, " ldap ldapdn ldapm");
833 #if defined(LOOKUP_MYSQL) && LOOKUP_MYSQL!=2
834 fprintf(f, " mysql");
836 #if defined(LOOKUP_NIS) && LOOKUP_NIS!=2
837 fprintf(f, " nis nis0");
839 #if defined(LOOKUP_NISPLUS) && LOOKUP_NISPLUS!=2
840 fprintf(f, " nisplus");
842 #if defined(LOOKUP_ORACLE) && LOOKUP_ORACLE!=2
843 fprintf(f, " oracle");
845 #if defined(LOOKUP_PASSWD) && LOOKUP_PASSWD!=2
846 fprintf(f, " passwd");
848 #if defined(LOOKUP_PGSQL) && LOOKUP_PGSQL!=2
849 fprintf(f, " pgsql");
851 #if defined(LOOKUP_SQLITE) && LOOKUP_SQLITE!=2
852 fprintf(f, " sqlite");
854 #if defined(LOOKUP_TESTDB) && LOOKUP_TESTDB!=2
855 fprintf(f, " testdb");
857 #if defined(LOOKUP_WHOSON) && LOOKUP_WHOSON!=2
858 fprintf(f, " whoson");
862 fprintf(f, "Authenticators:");
864 fprintf(f, " cram_md5");
866 #ifdef AUTH_CYRUS_SASL
867 fprintf(f, " cyrus_sasl");
870 fprintf(f, " dovecot");
873 fprintf(f, " gsasl");
875 #ifdef AUTH_PLAINTEXT
876 fprintf(f, " plaintext");
883 fprintf(f, "Routers:");
885 fprintf(f, " accept");
887 #ifdef ROUTER_DNSLOOKUP
888 fprintf(f, " dnslookup");
890 #ifdef ROUTER_IPLITERAL
891 fprintf(f, " ipliteral");
893 #ifdef ROUTER_IPLOOKUP
894 fprintf(f, " iplookup");
896 #ifdef ROUTER_MANUALROUTE
897 fprintf(f, " manualroute");
899 #ifdef ROUTER_QUERYPROGRAM
900 fprintf(f, " queryprogram");
902 #ifdef ROUTER_REDIRECT
903 fprintf(f, " redirect");
907 fprintf(f, "Transports:");
908 #ifdef TRANSPORT_APPENDFILE
909 fprintf(f, " appendfile");
910 #ifdef SUPPORT_MAILDIR
911 fprintf(f, "/maildir");
913 #ifdef SUPPORT_MAILSTORE
914 fprintf(f, "/mailstore");
920 #ifdef TRANSPORT_AUTOREPLY
921 fprintf(f, " autoreply");
923 #ifdef TRANSPORT_LMTP
926 #ifdef TRANSPORT_PIPE
929 #ifdef TRANSPORT_SMTP
934 if (fixed_never_users[0] > 0)
937 fprintf(f, "Fixed never_users: ");
938 for (i = 1; i <= (int)fixed_never_users[0] - 1; i++)
939 fprintf(f, "%d:", (unsigned int)fixed_never_users[i]);
940 fprintf(f, "%d\n", (unsigned int)fixed_never_users[i]);
943 fprintf(f, "Size of off_t: " SIZE_T_FMT "\n", sizeof(off_t));
945 /* Everything else is details which are only worth reporting when debugging.
946 Perhaps the tls_version_report should move into this too. */
951 /* clang defines __GNUC__ (at least, for me) so test for it first */
952 #if defined(__clang__)
953 fprintf(f, "Compiler: CLang [%s]\n", __clang_version__);
954 #elif defined(__GNUC__)
955 fprintf(f, "Compiler: GCC [%s]\n",
959 "? unknown version ?"
963 fprintf(f, "Compiler: <unknown>\n");
967 tls_version_report(f);
970 for (authi = auths_available; *authi->driver_name != '\0'; ++authi) {
971 if (authi->version_report) {
972 (*authi->version_report)(f);
976 fprintf(f, "Library version: PCRE: Compile: %d.%d%s\n"
978 PCRE_MAJOR, PCRE_MINOR,
979 /* PRE_PRERELEASE is either defined and empty or a string.
980 * unless its an ancient version of PCRE in which case it
982 #ifdef PCRE_PRERELEASE
983 # define STRINGIFY(x) #x
984 STRINGIFY(PCRE_PRERELEASE) "",
992 for (i = 0; i < lookup_list_count; i++)
994 if (lookup_list[i]->version_report)
995 lookup_list[i]->version_report(f);
998 #ifdef WHITELIST_D_MACROS
999 fprintf(f, "WHITELIST_D_MACROS: \"%s\"\n", WHITELIST_D_MACROS);
1001 fprintf(f, "WHITELIST_D_MACROS unset\n");
1003 #ifdef TRUSTED_CONFIG_LIST
1004 fprintf(f, "TRUSTED_CONFIG_LIST: \"%s\"\n", TRUSTED_CONFIG_LIST);
1006 fprintf(f, "TRUSTED_CONFIG_LIST unset\n");
1015 /*************************************************
1016 * Quote a local part *
1017 *************************************************/
1019 /* This function is used when a sender address or a From: or Sender: header
1020 line is being created from the caller's login, or from an authenticated_id. It
1021 applies appropriate quoting rules for a local part.
1023 Argument: the local part
1024 Returns: the local part, quoted if necessary
1028 local_part_quote(uschar *lpart)
1030 BOOL needs_quote = FALSE;
1035 for (t = lpart; !needs_quote && *t != 0; t++)
1037 needs_quote = !isalnum(*t) && strchr("!#$%&'*+-/=?^_`{|}~", *t) == NULL &&
1038 (*t != '.' || t == lpart || t[1] == 0);
1041 if (!needs_quote) return lpart;
1044 yield = string_cat(NULL, &size, &ptr, US"\"", 1);
1048 uschar *nq = US Ustrpbrk(lpart, "\\\"");
1051 yield = string_cat(yield, &size, &ptr, lpart, Ustrlen(lpart));
1054 yield = string_cat(yield, &size, &ptr, lpart, nq - lpart);
1055 yield = string_cat(yield, &size, &ptr, US"\\", 1);
1056 yield = string_cat(yield, &size, &ptr, nq, 1);
1060 yield = string_cat(yield, &size, &ptr, US"\"", 1);
1068 /*************************************************
1069 * Load readline() functions *
1070 *************************************************/
1072 /* This function is called from testing executions that read data from stdin,
1073 but only when running as the calling user. Currently, only -be does this. The
1074 function loads the readline() function library and passes back the functions.
1075 On some systems, it needs the curses library, so load that too, but try without
1076 it if loading fails. All this functionality has to be requested at build time.
1079 fn_readline_ptr pointer to where to put the readline pointer
1080 fn_addhist_ptr pointer to where to put the addhistory function
1082 Returns: the dlopen handle or NULL on failure
1086 set_readline(char * (**fn_readline_ptr)(const char *),
1087 void (**fn_addhist_ptr)(const char *))
1090 void *dlhandle_curses = dlopen("libcurses." DYNLIB_FN_EXT, RTLD_GLOBAL|RTLD_LAZY);
1092 dlhandle = dlopen("libreadline." DYNLIB_FN_EXT, RTLD_GLOBAL|RTLD_NOW);
1093 if (dlhandle_curses != NULL) dlclose(dlhandle_curses);
1095 if (dlhandle != NULL)
1097 /* Checked manual pages; at least in GNU Readline 6.1, the prototypes are:
1098 * char * readline (const char *prompt);
1099 * void add_history (const char *string);
1101 *fn_readline_ptr = (char *(*)(const char*))dlsym(dlhandle, "readline");
1102 *fn_addhist_ptr = (void(*)(const char*))dlsym(dlhandle, "add_history");
1106 DEBUG(D_any) debug_printf("failed to load readline: %s\n", dlerror());
1115 /*************************************************
1116 * Get a line from stdin for testing things *
1117 *************************************************/
1119 /* This function is called when running tests that can take a number of lines
1120 of input (for example, -be and -bt). It handles continuations and trailing
1121 spaces. And prompting and a blank line output on eof. If readline() is in use,
1122 the arguments are non-NULL and provide the relevant functions.
1125 fn_readline readline function or NULL
1126 fn_addhist addhist function or NULL
1128 Returns: pointer to dynamic memory, or NULL at end of file
1132 get_stdinput(char *(*fn_readline)(const char *), void(*fn_addhist)(const char *))
1137 uschar *yield = NULL;
1139 if (fn_readline == NULL) { printf("> "); fflush(stdout); }
1143 uschar buffer[1024];
1147 char *readline_line = NULL;
1148 if (fn_readline != NULL)
1150 if ((readline_line = fn_readline((i > 0)? "":"> ")) == NULL) break;
1151 if (*readline_line != 0 && fn_addhist != NULL) fn_addhist(readline_line);
1152 p = US readline_line;
1157 /* readline() not in use */
1160 if (Ufgets(buffer, sizeof(buffer), stdin) == NULL) break;
1164 /* Handle the line */
1166 ss = p + (int)Ustrlen(p);
1167 while (ss > p && isspace(ss[-1])) ss--;
1171 while (p < ss && isspace(*p)) p++; /* leading space after cont */
1174 yield = string_cat(yield, &size, &ptr, p, ss - p);
1177 if (fn_readline != NULL) free(readline_line);
1180 if (ss == p || yield[ptr-1] != '\\')
1188 if (yield == NULL) printf("\n");
1194 /*************************************************
1195 * Output usage information for the program *
1196 *************************************************/
1198 /* This function is called when there are no recipients
1199 or a specific --help argument was added.
1202 progname information on what name we were called by
1204 Returns: DOES NOT RETURN
1208 exim_usage(uschar *progname)
1211 /* Handle specific program invocation varients */
1212 if (Ustrcmp(progname, US"-mailq") == 0)
1215 "mailq - list the contents of the mail queue\n\n"
1216 "For a list of options, see the Exim documentation.\n");
1220 /* Generic usage - we output this whatever happens */
1222 "Exim is a Mail Transfer Agent. It is normally called by Mail User Agents,\n"
1223 "not directly from a shell command line. Options and/or arguments control\n"
1224 "what it does when called. For a list of options, see the Exim documentation.\n");
1231 /*************************************************
1232 * Validate that the macros given are okay *
1233 *************************************************/
1235 /* Typically, Exim will drop privileges if macros are supplied. In some
1236 cases, we want to not do so.
1238 Arguments: none (macros is a global)
1239 Returns: true if trusted, false otherwise
1243 macros_trusted(void)
1245 #ifdef WHITELIST_D_MACROS
1247 uschar *whitelisted, *end, *p, **whites, **w;
1248 int white_count, i, n;
1250 BOOL prev_char_item, found;
1255 #ifndef WHITELIST_D_MACROS
1259 /* We only trust -D overrides for some invoking users:
1260 root, the exim run-time user, the optional config owner user.
1261 I don't know why config-owner would be needed, but since they can own the
1262 config files anyway, there's no security risk to letting them override -D. */
1263 if ( ! ((real_uid == root_uid)
1264 || (real_uid == exim_uid)
1265 #ifdef CONFIGURE_OWNER
1266 || (real_uid == config_uid)
1270 debug_printf("macros_trusted rejecting macros for uid %d\n", (int) real_uid);
1274 /* Get a list of macros which are whitelisted */
1275 whitelisted = string_copy_malloc(US WHITELIST_D_MACROS);
1276 prev_char_item = FALSE;
1278 for (p = whitelisted; *p != '\0'; ++p)
1280 if (*p == ':' || isspace(*p))
1285 prev_char_item = FALSE;
1288 if (!prev_char_item)
1289 prev_char_item = TRUE;
1296 whites = store_malloc(sizeof(uschar *) * (white_count+1));
1297 for (p = whitelisted, i = 0; (p != end) && (i < white_count); ++p)
1302 if (i == white_count)
1304 while (*p != '\0' && p < end)
1310 /* The list of macros should be very short. Accept the N*M complexity. */
1311 for (m = macros; m != NULL; m = m->next)
1314 for (w = whites; *w; ++w)
1315 if (Ustrcmp(*w, m->name) == 0)
1322 if (m->replacement == NULL)
1324 len = Ustrlen(m->replacement);
1327 n = pcre_exec(regex_whitelisted_macro, NULL, CS m->replacement, len,
1328 0, PCRE_EOPT, NULL, 0);
1331 if (n != PCRE_ERROR_NOMATCH)
1332 debug_printf("macros_trusted checking %s returned %d\n", m->name, n);
1336 DEBUG(D_any) debug_printf("macros_trusted overridden to true by whitelisting\n");
1342 /*************************************************
1343 * Entry point and high-level code *
1344 *************************************************/
1346 /* Entry point for the Exim mailer. Analyse the arguments and arrange to take
1347 the appropriate action. All the necessary functions are present in the one
1348 binary. I originally thought one should split it up, but it turns out that so
1349 much of the apparatus is needed in each chunk that one might as well just have
1350 it all available all the time, which then makes the coding easier as well.
1353 argc count of entries in argv
1354 argv argument strings, with argv[0] being the program name
1356 Returns: EXIT_SUCCESS if terminated successfully
1357 EXIT_FAILURE otherwise, except when a message has been sent
1358 to the sender, and -oee was given
1362 main(int argc, char **cargv)
1364 uschar **argv = USS cargv;
1365 int arg_receive_timeout = -1;
1366 int arg_smtp_receive_timeout = -1;
1367 int arg_error_handling = error_handling;
1368 int filter_sfd = -1;
1369 int filter_ufd = -1;
1372 int list_queue_option = 0;
1374 int msg_action_arg = -1;
1375 int namelen = (argv[0] == NULL)? 0 : Ustrlen(argv[0]);
1376 int queue_only_reason = 0;
1378 int perl_start_option = 0;
1380 int recipients_arg = argc;
1381 int sender_address_domain = 0;
1382 int test_retry_arg = -1;
1383 int test_rewrite_arg = -1;
1384 BOOL arg_queue_only = FALSE;
1385 BOOL bi_option = FALSE;
1386 BOOL checking = FALSE;
1387 BOOL count_queue = FALSE;
1388 BOOL expansion_test = FALSE;
1389 BOOL extract_recipients = FALSE;
1390 BOOL forced_delivery = FALSE;
1391 BOOL f_end_dot = FALSE;
1392 BOOL deliver_give_up = FALSE;
1393 BOOL list_queue = FALSE;
1394 BOOL list_options = FALSE;
1395 BOOL local_queue_only;
1397 BOOL one_msg_action = FALSE;
1398 BOOL queue_only_set = FALSE;
1399 BOOL receiving_message = TRUE;
1400 BOOL sender_ident_set = FALSE;
1401 BOOL session_local_queue_only;
1403 BOOL removed_privilege = FALSE;
1404 BOOL usage_wanted = FALSE;
1405 BOOL verify_address_mode = FALSE;
1406 BOOL verify_as_sender = FALSE;
1407 BOOL version_printed = FALSE;
1408 uschar *alias_arg = NULL;
1409 uschar *called_as = US"";
1410 uschar *start_queue_run_id = NULL;
1411 uschar *stop_queue_run_id = NULL;
1412 uschar *expansion_test_message = NULL;
1413 uschar *ftest_domain = NULL;
1414 uschar *ftest_localpart = NULL;
1415 uschar *ftest_prefix = NULL;
1416 uschar *ftest_suffix = NULL;
1417 uschar *malware_test_file = NULL;
1418 uschar *real_sender_address;
1419 uschar *originator_home = US"/";
1423 struct stat statbuf;
1424 pid_t passed_qr_pid = (pid_t)0;
1425 int passed_qr_pipe = -1;
1426 gid_t group_list[NGROUPS_MAX];
1428 /* Possible options for -R and -S */
1430 static uschar *rsopts[] = { US"f", US"ff", US"r", US"rf", US"rff" };
1432 /* Need to define this in case we need to change the environment in order
1433 to get rid of a bogus time zone. We have to make it char rather than uschar
1434 because some OS define it in /usr/include/unistd.h. */
1436 extern char **environ;
1438 /* If the Exim user and/or group and/or the configuration file owner/group were
1439 defined by ref:name at build time, we must now find the actual uid/gid values.
1440 This is a feature to make the lives of binary distributors easier. */
1442 #ifdef EXIM_USERNAME
1443 if (route_finduser(US EXIM_USERNAME, &pw, &exim_uid))
1447 fprintf(stderr, "exim: refusing to run with uid 0 for \"%s\"\n",
1451 /* If ref:name uses a number as the name, route_finduser() returns
1452 TRUE with exim_uid set and pw coerced to NULL. */
1454 exim_gid = pw->pw_gid;
1455 #ifndef EXIM_GROUPNAME
1459 "exim: ref:name should specify a usercode, not a group.\n"
1460 "exim: can't let you get away with it unless you also specify a group.\n");
1467 fprintf(stderr, "exim: failed to find uid for user name \"%s\"\n",
1473 #ifdef EXIM_GROUPNAME
1474 if (!route_findgroup(US EXIM_GROUPNAME, &exim_gid))
1476 fprintf(stderr, "exim: failed to find gid for group name \"%s\"\n",
1482 #ifdef CONFIGURE_OWNERNAME
1483 if (!route_finduser(US CONFIGURE_OWNERNAME, NULL, &config_uid))
1485 fprintf(stderr, "exim: failed to find uid for user name \"%s\"\n",
1486 CONFIGURE_OWNERNAME);
1491 /* We default the system_filter_user to be the Exim run-time user, as a
1492 sane non-root value. */
1493 system_filter_uid = exim_uid;
1495 #ifdef CONFIGURE_GROUPNAME
1496 if (!route_findgroup(US CONFIGURE_GROUPNAME, &config_gid))
1498 fprintf(stderr, "exim: failed to find gid for group name \"%s\"\n",
1499 CONFIGURE_GROUPNAME);
1504 /* In the Cygwin environment, some initialization needs doing. It is fudged
1505 in by means of this macro. */
1511 /* Check a field which is patched when we are running Exim within its
1512 testing harness; do a fast initial check, and then the whole thing. */
1514 running_in_test_harness =
1515 *running_status == '<' && Ustrcmp(running_status, "<<<testing>>>") == 0;
1517 /* The C standard says that the equivalent of setlocale(LC_ALL, "C") is obeyed
1518 at the start of a program; however, it seems that some environments do not
1519 follow this. A "strange" locale can affect the formatting of timestamps, so we
1522 setlocale(LC_ALL, "C");
1524 /* Set up the default handler for timing using alarm(). */
1526 os_non_restarting_signal(SIGALRM, sigalrm_handler);
1528 /* Ensure we have a buffer for constructing log entries. Use malloc directly,
1529 because store_malloc writes a log entry on failure. */
1531 log_buffer = (uschar *)malloc(LOG_BUFFER_SIZE);
1532 if (log_buffer == NULL)
1534 fprintf(stderr, "exim: failed to get store for log buffer\n");
1538 /* Set log_stderr to stderr, provided that stderr exists. This gets reset to
1539 NULL when the daemon is run and the file is closed. We have to use this
1540 indirection, because some systems don't allow writing to the variable "stderr".
1543 if (fstat(fileno(stderr), &statbuf) >= 0) log_stderr = stderr;
1545 /* Arrange for the PCRE regex library to use our store functions. Note that
1546 the normal calls are actually macros that add additional arguments for
1547 debugging purposes so we have to assign specially constructed functions here.
1548 The default is to use store in the stacking pool, but this is overridden in the
1549 regex_must_compile() function. */
1551 pcre_malloc = function_store_get;
1552 pcre_free = function_dummy_free;
1554 /* Ensure there is a big buffer for temporary use in several places. It is put
1555 in malloc store so that it can be freed for enlargement if necessary. */
1557 big_buffer = store_malloc(big_buffer_size);
1559 /* Set up the handler for the data request signal, and set the initial
1560 descriptive text. */
1562 set_process_info("initializing");
1563 os_restarting_signal(SIGUSR1, usr1_handler);
1565 /* SIGHUP is used to get the daemon to reconfigure. It gets set as appropriate
1566 in the daemon code. For the rest of Exim's uses, we ignore it. */
1568 signal(SIGHUP, SIG_IGN);
1570 /* We don't want to die on pipe errors as the code is written to handle
1571 the write error instead. */
1573 signal(SIGPIPE, SIG_IGN);
1575 /* Under some circumstance on some OS, Exim can get called with SIGCHLD
1576 set to SIG_IGN. This causes subprocesses that complete before the parent
1577 process waits for them not to hang around, so when Exim calls wait(), nothing
1578 is there. The wait() code has been made robust against this, but let's ensure
1579 that SIGCHLD is set to SIG_DFL, because it's tidier to wait and get a process
1580 ending status. We use sigaction rather than plain signal() on those OS where
1581 SA_NOCLDWAIT exists, because we want to be sure it is turned off. (There was a
1582 problem on AIX with this.) */
1586 struct sigaction act;
1587 act.sa_handler = SIG_DFL;
1588 sigemptyset(&(act.sa_mask));
1590 sigaction(SIGCHLD, &act, NULL);
1593 signal(SIGCHLD, SIG_DFL);
1596 /* Save the arguments for use if we re-exec exim as a daemon after receiving
1601 /* Set up the version number. Set up the leading 'E' for the external form of
1602 message ids, set the pointer to the internal form, and initialize it to
1603 indicate no message being processed. */
1606 message_id_option[0] = '-';
1607 message_id_external = message_id_option + 1;
1608 message_id_external[0] = 'E';
1609 message_id = message_id_external + 1;
1612 /* Set the umask to zero so that any files Exim creates using open() are
1613 created with the modes that it specifies. NOTE: Files created with fopen() have
1614 a problem, which was not recognized till rather late (February 2006). With this
1615 umask, such files will be world writeable. (They are all content scanning files
1616 in the spool directory, which isn't world-accessible, so this is not a
1617 disaster, but it's untidy.) I don't want to change this overall setting,
1618 however, because it will interact badly with the open() calls. Instead, there's
1619 now a function called modefopen() that fiddles with the umask while calling
1624 /* Precompile the regular expression for matching a message id. Keep this in
1625 step with the code that generates ids in the accept.c module. We need to do
1626 this here, because the -M options check their arguments for syntactic validity
1627 using mac_ismsgid, which uses this. */
1630 regex_must_compile(US"^(?:[^\\W_]{6}-){2}[^\\W_]{2}$", FALSE, TRUE);
1632 /* Precompile the regular expression that is used for matching an SMTP error
1633 code, possibly extended, at the start of an error message. Note that the
1634 terminating whitespace character is included. */
1637 regex_must_compile(US"^\\d\\d\\d\\s(?:\\d\\.\\d\\d?\\d?\\.\\d\\d?\\d?\\s)?",
1640 #ifdef WHITELIST_D_MACROS
1641 /* Precompile the regular expression used to filter the content of macros
1642 given to -D for permissibility. */
1644 regex_whitelisted_macro =
1645 regex_must_compile(US"^[A-Za-z0-9_/.-]*$", FALSE, TRUE);
1649 /* If the program is called as "mailq" treat it as equivalent to "exim -bp";
1650 this seems to be a generally accepted convention, since one finds symbolic
1651 links called "mailq" in standard OS configurations. */
1653 if ((namelen == 5 && Ustrcmp(argv[0], "mailq") == 0) ||
1654 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/mailq", 6) == 0))
1657 receiving_message = FALSE;
1658 called_as = US"-mailq";
1661 /* If the program is called as "rmail" treat it as equivalent to
1662 "exim -i -oee", thus allowing UUCP messages to be input using non-SMTP mode,
1663 i.e. preventing a single dot on a line from terminating the message, and
1664 returning with zero return code, even in cases of error (provided an error
1665 message has been sent). */
1667 if ((namelen == 5 && Ustrcmp(argv[0], "rmail") == 0) ||
1668 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/rmail", 6) == 0))
1671 called_as = US"-rmail";
1672 errors_sender_rc = EXIT_SUCCESS;
1675 /* If the program is called as "rsmtp" treat it as equivalent to "exim -bS";
1676 this is a smail convention. */
1678 if ((namelen == 5 && Ustrcmp(argv[0], "rsmtp") == 0) ||
1679 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/rsmtp", 6) == 0))
1681 smtp_input = smtp_batched_input = TRUE;
1682 called_as = US"-rsmtp";
1685 /* If the program is called as "runq" treat it as equivalent to "exim -q";
1686 this is a smail convention. */
1688 if ((namelen == 4 && Ustrcmp(argv[0], "runq") == 0) ||
1689 (namelen > 4 && Ustrncmp(argv[0] + namelen - 5, "/runq", 5) == 0))
1692 receiving_message = FALSE;
1693 called_as = US"-runq";
1696 /* If the program is called as "newaliases" treat it as equivalent to
1697 "exim -bi"; this is a sendmail convention. */
1699 if ((namelen == 10 && Ustrcmp(argv[0], "newaliases") == 0) ||
1700 (namelen > 10 && Ustrncmp(argv[0] + namelen - 11, "/newaliases", 11) == 0))
1703 receiving_message = FALSE;
1704 called_as = US"-newaliases";
1707 /* Save the original effective uid for a couple of uses later. It should
1708 normally be root, but in some esoteric environments it may not be. */
1710 original_euid = geteuid();
1712 /* Get the real uid and gid. If the caller is root, force the effective uid/gid
1713 to be the same as the real ones. This makes a difference only if Exim is setuid
1714 (or setgid) to something other than root, which could be the case in some
1715 special configurations. */
1717 real_uid = getuid();
1718 real_gid = getgid();
1720 if (real_uid == root_uid)
1722 rv = setgid(real_gid);
1725 fprintf(stderr, "exim: setgid(%ld) failed: %s\n",
1726 (long int)real_gid, strerror(errno));
1729 rv = setuid(real_uid);
1732 fprintf(stderr, "exim: setuid(%ld) failed: %s\n",
1733 (long int)real_uid, strerror(errno));
1738 /* If neither the original real uid nor the original euid was root, Exim is
1739 running in an unprivileged state. */
1741 unprivileged = (real_uid != root_uid && original_euid != root_uid);
1743 /* Scan the program's arguments. Some can be dealt with right away; others are
1744 simply recorded for checking and handling afterwards. Do a high-level switch
1745 on the second character (the one after '-'), to save some effort. */
1747 for (i = 1; i < argc; i++)
1749 BOOL badarg = FALSE;
1750 uschar *arg = argv[i];
1754 /* An argument not starting with '-' is the start of a recipients list;
1755 break out of the options-scanning loop. */
1763 /* An option consistion of -- terminates the options */
1765 if (Ustrcmp(arg, "--") == 0)
1767 recipients_arg = i + 1;
1771 /* Handle flagged options */
1773 switchchar = arg[1];
1776 /* Make all -ex options synonymous with -oex arguments, since that
1777 is assumed by various callers. Also make -qR options synonymous with -R
1778 options, as that seems to be required as well. Allow for -qqR too, and
1779 the same for -S options. */
1781 if (Ustrncmp(arg+1, "oe", 2) == 0 ||
1782 Ustrncmp(arg+1, "qR", 2) == 0 ||
1783 Ustrncmp(arg+1, "qS", 2) == 0)
1785 switchchar = arg[2];
1788 else if (Ustrncmp(arg+1, "qqR", 3) == 0 || Ustrncmp(arg+1, "qqS", 3) == 0)
1790 switchchar = arg[3];
1792 queue_2stage = TRUE;
1795 /* Make -r synonymous with -f, since it is a documented alias */
1797 else if (arg[1] == 'r') switchchar = 'f';
1799 /* Make -ov synonymous with -v */
1801 else if (Ustrcmp(arg, "-ov") == 0)
1807 /* deal with --option_aliases */
1808 else if (switchchar == '-')
1810 if (Ustrcmp(argrest, "help") == 0)
1812 usage_wanted = TRUE;
1815 else if (Ustrcmp(argrest, "version") == 0)
1822 /* High-level switch on active initial letter */
1826 /* -Btype is a sendmail option for 7bit/8bit setting. Exim is 8-bit clean
1827 so has no need of it. */
1830 if (*argrest == 0) i++; /* Skip over the type */
1835 receiving_message = FALSE; /* Reset TRUE for -bm, -bS, -bs below */
1837 /* -bd: Run in daemon mode, awaiting SMTP connections.
1838 -bdf: Ditto, but in the foreground.
1841 if (*argrest == 'd')
1843 daemon_listen = TRUE;
1844 if (*(++argrest) == 'f') background_daemon = FALSE;
1845 else if (*argrest != 0) { badarg = TRUE; break; }
1848 /* -be: Run in expansion test mode
1849 -bem: Ditto, but read a message from a file first
1852 else if (*argrest == 'e')
1854 expansion_test = checking = TRUE;
1855 if (argrest[1] == 'm')
1857 if (++i >= argc) { badarg = TRUE; break; }
1858 expansion_test_message = argv[i];
1861 if (argrest[1] != 0) { badarg = TRUE; break; }
1864 /* -bF: Run system filter test */
1866 else if (*argrest == 'F')
1868 filter_test |= FTEST_SYSTEM;
1869 if (*(++argrest) != 0) { badarg = TRUE; break; }
1870 if (++i < argc) filter_test_sfile = argv[i]; else
1872 fprintf(stderr, "exim: file name expected after %s\n", argv[i-1]);
1877 /* -bf: Run user filter test
1878 -bfd: Set domain for filter testing
1879 -bfl: Set local part for filter testing
1880 -bfp: Set prefix for filter testing
1881 -bfs: Set suffix for filter testing
1884 else if (*argrest == 'f')
1886 if (*(++argrest) == 0)
1888 filter_test |= FTEST_USER;
1889 if (++i < argc) filter_test_ufile = argv[i]; else
1891 fprintf(stderr, "exim: file name expected after %s\n", argv[i-1]);
1899 fprintf(stderr, "exim: string expected after %s\n", arg);
1902 if (Ustrcmp(argrest, "d") == 0) ftest_domain = argv[i];
1903 else if (Ustrcmp(argrest, "l") == 0) ftest_localpart = argv[i];
1904 else if (Ustrcmp(argrest, "p") == 0) ftest_prefix = argv[i];
1905 else if (Ustrcmp(argrest, "s") == 0) ftest_suffix = argv[i];
1906 else { badarg = TRUE; break; }
1910 /* -bh: Host checking - an IP address must follow. */
1912 else if (Ustrcmp(argrest, "h") == 0 || Ustrcmp(argrest, "hc") == 0)
1914 if (++i >= argc) { badarg = TRUE; break; }
1915 sender_host_address = argv[i];
1916 host_checking = checking = log_testing_mode = TRUE;
1917 host_checking_callout = argrest[1] == 'c';
1920 /* -bi: This option is used by sendmail to initialize *the* alias file,
1921 though it has the -oA option to specify a different file. Exim has no
1922 concept of *the* alias file, but since Sun's YP make script calls
1923 sendmail this way, some support must be provided. */
1925 else if (Ustrcmp(argrest, "i") == 0) bi_option = TRUE;
1927 /* -bm: Accept and deliver message - the default option. Reinstate
1928 receiving_message, which got turned off for all -b options. */
1930 else if (Ustrcmp(argrest, "m") == 0) receiving_message = TRUE;
1932 /* -bmalware: test the filename given for malware */
1934 else if (Ustrcmp(argrest, "malware") == 0)
1936 if (++i >= argc) { badarg = TRUE; break; }
1937 malware_test_file = argv[i];
1940 /* -bnq: For locally originating messages, do not qualify unqualified
1941 addresses. In the envelope, this causes errors; in header lines they
1944 else if (Ustrcmp(argrest, "nq") == 0)
1946 allow_unqualified_sender = FALSE;
1947 allow_unqualified_recipient = FALSE;
1950 /* -bpxx: List the contents of the mail queue, in various forms. If
1951 the option is -bpc, just a queue count is needed. Otherwise, if the
1952 first letter after p is r, then order is random. */
1954 else if (*argrest == 'p')
1956 if (*(++argrest) == 'c')
1959 if (*(++argrest) != 0) badarg = TRUE;
1963 if (*argrest == 'r')
1965 list_queue_option = 8;
1968 else list_queue_option = 0;
1972 /* -bp: List the contents of the mail queue, top-level only */
1974 if (*argrest == 0) {}
1976 /* -bpu: List the contents of the mail queue, top-level undelivered */
1978 else if (Ustrcmp(argrest, "u") == 0) list_queue_option += 1;
1980 /* -bpa: List the contents of the mail queue, including all delivered */
1982 else if (Ustrcmp(argrest, "a") == 0) list_queue_option += 2;
1984 /* Unknown after -bp[r] */
1994 /* -bP: List the configuration variables given as the address list.
1995 Force -v, so configuration errors get displayed. */
1997 else if (Ustrcmp(argrest, "P") == 0)
1999 list_options = TRUE;
2000 debug_selector |= D_v;
2001 debug_file = stderr;
2004 /* -brt: Test retry configuration lookup */
2006 else if (Ustrcmp(argrest, "rt") == 0)
2008 test_retry_arg = i + 1;
2012 /* -brw: Test rewrite configuration */
2014 else if (Ustrcmp(argrest, "rw") == 0)
2016 test_rewrite_arg = i + 1;
2020 /* -bS: Read SMTP commands on standard input, but produce no replies -
2021 all errors are reported by sending messages. */
2023 else if (Ustrcmp(argrest, "S") == 0)
2024 smtp_input = smtp_batched_input = receiving_message = TRUE;
2026 /* -bs: Read SMTP commands on standard input and produce SMTP replies
2027 on standard output. */
2029 else if (Ustrcmp(argrest, "s") == 0) smtp_input = receiving_message = TRUE;
2031 /* -bt: address testing mode */
2033 else if (Ustrcmp(argrest, "t") == 0)
2034 address_test_mode = checking = log_testing_mode = TRUE;
2036 /* -bv: verify addresses */
2038 else if (Ustrcmp(argrest, "v") == 0)
2039 verify_address_mode = checking = log_testing_mode = TRUE;
2041 /* -bvs: verify sender addresses */
2043 else if (Ustrcmp(argrest, "vs") == 0)
2045 verify_address_mode = checking = log_testing_mode = TRUE;
2046 verify_as_sender = TRUE;
2049 /* -bV: Print version string and support details */
2051 else if (Ustrcmp(argrest, "V") == 0)
2053 printf("Exim version %s #%s built %s\n", version_string,
2054 version_cnumber, version_date);
2055 printf("%s\n", CS version_copyright);
2056 version_printed = TRUE;
2057 show_whats_supported(stdout);
2064 /* -C: change configuration file list; ignore if it isn't really
2065 a change! Enforce a prefix check if required. */
2070 if(++i < argc) argrest = argv[i]; else
2071 { badarg = TRUE; break; }
2073 if (Ustrcmp(config_main_filelist, argrest) != 0)
2075 #ifdef ALT_CONFIG_PREFIX
2077 int len = Ustrlen(ALT_CONFIG_PREFIX);
2078 uschar *list = argrest;
2080 while((filename = string_nextinlist(&list, &sep, big_buffer,
2081 big_buffer_size)) != NULL)
2083 if ((Ustrlen(filename) < len ||
2084 Ustrncmp(filename, ALT_CONFIG_PREFIX, len) != 0 ||
2085 Ustrstr(filename, "/../") != NULL) &&
2086 (Ustrcmp(filename, "/dev/null") != 0 || real_uid != root_uid))
2088 fprintf(stderr, "-C Permission denied\n");
2093 if (real_uid != root_uid)
2095 #ifdef TRUSTED_CONFIG_LIST
2097 if (real_uid != exim_uid
2098 #ifdef CONFIGURE_OWNER
2099 && real_uid != config_uid
2102 trusted_config = FALSE;
2105 FILE *trust_list = Ufopen(TRUSTED_CONFIG_LIST, "rb");
2108 struct stat statbuf;
2110 if (fstat(fileno(trust_list), &statbuf) != 0 ||
2111 (statbuf.st_uid != root_uid /* owner not root */
2112 #ifdef CONFIGURE_OWNER
2113 && statbuf.st_uid != config_uid /* owner not the special one */
2116 (statbuf.st_gid != root_gid /* group not root */
2117 #ifdef CONFIGURE_GROUP
2118 && statbuf.st_gid != config_gid /* group not the special one */
2120 && (statbuf.st_mode & 020) != 0 /* group writeable */
2122 (statbuf.st_mode & 2) != 0) /* world writeable */
2124 trusted_config = FALSE;
2129 /* Well, the trust list at least is up to scratch... */
2130 void *reset_point = store_get(0);
2131 uschar *trusted_configs[32];
2135 while (Ufgets(big_buffer, big_buffer_size, trust_list))
2137 uschar *start = big_buffer, *nl;
2138 while (*start && isspace(*start))
2142 nl = Ustrchr(start, '\n');
2145 trusted_configs[nr_configs++] = string_copy(start);
2146 if (nr_configs == 32)
2154 uschar *list = argrest;
2156 while (trusted_config && (filename = string_nextinlist(&list,
2157 &sep, big_buffer, big_buffer_size)) != NULL)
2159 for (i=0; i < nr_configs; i++)
2161 if (Ustrcmp(filename, trusted_configs[i]) == 0)
2164 if (i == nr_configs)
2166 trusted_config = FALSE;
2170 store_reset(reset_point);
2174 /* No valid prefixes found in trust_list file. */
2175 trusted_config = FALSE;
2181 /* Could not open trust_list file. */
2182 trusted_config = FALSE;
2186 /* Not root; don't trust config */
2187 trusted_config = FALSE;
2191 config_main_filelist = argrest;
2192 config_changed = TRUE;
2197 /* -D: set up a macro definition */
2200 #ifdef DISABLE_D_OPTION
2201 fprintf(stderr, "exim: -D is not available in this Exim binary\n");
2206 macro_item *mlast = NULL;
2209 uschar *s = argrest;
2211 while (isspace(*s)) s++;
2213 if (*s < 'A' || *s > 'Z')
2215 fprintf(stderr, "exim: macro name set by -D must start with "
2216 "an upper case letter\n");
2220 while (isalnum(*s) || *s == '_')
2222 if (ptr < sizeof(name)-1) name[ptr++] = *s;
2226 if (ptr == 0) { badarg = TRUE; break; }
2227 while (isspace(*s)) s++;
2230 if (*s++ != '=') { badarg = TRUE; break; }
2231 while (isspace(*s)) s++;
2234 for (m = macros; m != NULL; m = m->next)
2236 if (Ustrcmp(m->name, name) == 0)
2238 fprintf(stderr, "exim: duplicated -D in command line\n");
2244 m = store_get(sizeof(macro_item) + Ustrlen(name));
2246 m->command_line = TRUE;
2247 if (mlast == NULL) macros = m; else mlast->next = m;
2248 Ustrcpy(m->name, name);
2249 m->replacement = string_copy(s);
2251 if (clmacro_count >= MAX_CLMACROS)
2253 fprintf(stderr, "exim: too many -D options on command line\n");
2256 clmacros[clmacro_count++] = string_sprintf("-D%s=%s", m->name,
2262 /* -d: Set debug level (see also -v below) or set the drop_cr option.
2263 The latter is now a no-op, retained for compatibility only. If -dd is used,
2264 debugging subprocesses of the daemon is disabled. */
2267 if (Ustrcmp(argrest, "ropcr") == 0)
2269 /* drop_cr = TRUE; */
2272 /* Use an intermediate variable so that we don't set debugging while
2273 decoding the debugging bits. */
2277 unsigned int selector = D_default;
2280 if (*argrest == 'd')
2282 debug_daemon = TRUE;
2286 decode_bits(&selector, NULL, D_memory, 0, argrest, debug_options,
2287 debug_options_count, US"debug", 0);
2288 debug_selector = selector;
2293 /* -E: This is a local error message. This option is not intended for
2294 external use at all, but is not restricted to trusted callers because it
2295 does no harm (just suppresses certain error messages) and if Exim is run
2296 not setuid root it won't always be trusted when it generates error
2297 messages using this option. If there is a message id following -E, point
2298 message_reference at it, for logging. */
2301 local_error_message = TRUE;
2302 if (mac_ismsgid(argrest)) message_reference = argrest;
2306 /* -ex: The vacation program calls sendmail with the undocumented "-eq"
2307 option, so it looks as if historically the -oex options are also callable
2308 without the leading -o. So we have to accept them. Before the switch,
2309 anything starting -oe has been converted to -e. Exim does not support all
2310 of the sendmail error options. */
2313 if (Ustrcmp(argrest, "e") == 0)
2315 arg_error_handling = ERRORS_SENDER;
2316 errors_sender_rc = EXIT_SUCCESS;
2318 else if (Ustrcmp(argrest, "m") == 0) arg_error_handling = ERRORS_SENDER;
2319 else if (Ustrcmp(argrest, "p") == 0) arg_error_handling = ERRORS_STDERR;
2320 else if (Ustrcmp(argrest, "q") == 0) arg_error_handling = ERRORS_STDERR;
2321 else if (Ustrcmp(argrest, "w") == 0) arg_error_handling = ERRORS_SENDER;
2326 /* -F: Set sender's full name, used instead of the gecos entry from
2327 the password file. Since users can usually alter their gecos entries,
2328 there's no security involved in using this instead. The data can follow
2329 the -F or be in the next argument. */
2334 if(++i < argc) argrest = argv[i]; else
2335 { badarg = TRUE; break; }
2337 originator_name = argrest;
2338 sender_name_forced = TRUE;
2342 /* -f: Set sender's address - this value is only actually used if Exim is
2343 run by a trusted user, or if untrusted_set_sender is set and matches the
2344 address, except that the null address can always be set by any user. The
2345 test for this happens later, when the value given here is ignored when not
2346 permitted. For an untrusted user, the actual sender is still put in Sender:
2347 if it doesn't match the From: header (unless no_local_from_check is set).
2348 The data can follow the -f or be in the next argument. The -r switch is an
2349 obsolete form of -f but since there appear to be programs out there that
2350 use anything that sendmail has ever supported, better accept it - the
2351 synonymizing is done before the switch above.
2353 At this stage, we must allow domain literal addresses, because we don't
2354 know what the setting of allow_domain_literals is yet. Ditto for trailing
2355 dots and strip_trailing_dot. */
2363 if (i+1 < argc) argrest = argv[++i]; else
2364 { badarg = TRUE; break; }
2368 sender_address = string_sprintf(""); /* Ensure writeable memory */
2372 uschar *temp = argrest + Ustrlen(argrest) - 1;
2373 while (temp >= argrest && isspace(*temp)) temp--;
2374 if (temp >= argrest && *temp == '.') f_end_dot = TRUE;
2375 allow_domain_literals = TRUE;
2376 strip_trailing_dot = TRUE;
2377 sender_address = parse_extract_address(argrest, &errmess, &start, &end,
2378 &sender_address_domain, TRUE);
2379 allow_domain_literals = FALSE;
2380 strip_trailing_dot = FALSE;
2381 if (sender_address == NULL)
2383 fprintf(stderr, "exim: bad -f address \"%s\": %s\n", argrest, errmess);
2384 return EXIT_FAILURE;
2387 sender_address_forced = TRUE;
2391 /* This is some Sendmail thing which can be ignored */
2396 /* -h: Set the hop count for an incoming message. Exim does not currently
2397 support this; it always computes it by counting the Received: headers.
2398 To put it in will require a change to the spool header file format. */
2403 if(++i < argc) argrest = argv[i]; else
2404 { badarg = TRUE; break; }
2406 if (!isdigit(*argrest)) badarg = TRUE;
2410 /* -i: Set flag so dot doesn't end non-SMTP input (same as -oi, seems
2411 not to be documented for sendmail but mailx (at least) uses it) */
2414 if (*argrest == 0) dot_ends = FALSE; else badarg = TRUE;
2419 receiving_message = FALSE;
2421 /* -MC: continue delivery of another message via an existing open
2422 file descriptor. This option is used for an internal call by the
2423 smtp transport when there is a pending message waiting to go to an
2424 address to which it has got a connection. Five subsequent arguments are
2425 required: transport name, host name, IP address, sequence number, and
2426 message_id. Transports may decline to create new processes if the sequence
2427 number gets too big. The channel is stdin. This (-MC) must be the last
2428 argument. There's a subsequent check that the real-uid is privileged.
2430 If we are running in the test harness. delay for a bit, to let the process
2431 that set this one up complete. This makes for repeatability of the logging,
2434 if (Ustrcmp(argrest, "C") == 0)
2436 union sockaddr_46 interface_sock;
2437 EXIM_SOCKLEN_T size = sizeof(interface_sock);
2441 fprintf(stderr, "exim: too many or too few arguments after -MC\n");
2442 return EXIT_FAILURE;
2445 if (msg_action_arg >= 0)
2447 fprintf(stderr, "exim: incompatible arguments\n");
2448 return EXIT_FAILURE;
2451 continue_transport = argv[++i];
2452 continue_hostname = argv[++i];
2453 continue_host_address = argv[++i];
2454 continue_sequence = Uatoi(argv[++i]);
2455 msg_action = MSG_DELIVER;
2456 msg_action_arg = ++i;
2457 forced_delivery = TRUE;
2458 queue_run_pid = passed_qr_pid;
2459 queue_run_pipe = passed_qr_pipe;
2461 if (!mac_ismsgid(argv[i]))
2463 fprintf(stderr, "exim: malformed message id %s after -MC option\n",
2465 return EXIT_FAILURE;
2468 /* Set up $sending_ip_address and $sending_port */
2470 if (getsockname(fileno(stdin), (struct sockaddr *)(&interface_sock),
2472 sending_ip_address = host_ntoa(-1, &interface_sock, NULL,
2476 fprintf(stderr, "exim: getsockname() failed after -MC option: %s\n",
2478 return EXIT_FAILURE;
2481 if (running_in_test_harness) millisleep(500);
2485 /* -MCA: set the smtp_authenticated flag; this is useful only when it
2486 precedes -MC (see above). The flag indicates that the host to which
2487 Exim is connected has accepted an AUTH sequence. */
2489 else if (Ustrcmp(argrest, "CA") == 0)
2491 smtp_authenticated = TRUE;
2495 /* -MCP: set the smtp_use_pipelining flag; this is useful only when
2496 it preceded -MC (see above) */
2498 else if (Ustrcmp(argrest, "CP") == 0)
2500 smtp_use_pipelining = TRUE;
2504 /* -MCQ: pass on the pid of the queue-running process that started
2505 this chain of deliveries and the fd of its synchronizing pipe; this
2506 is useful only when it precedes -MC (see above) */
2508 else if (Ustrcmp(argrest, "CQ") == 0)
2510 if(++i < argc) passed_qr_pid = (pid_t)(Uatol(argv[i]));
2512 if(++i < argc) passed_qr_pipe = (int)(Uatol(argv[i]));
2517 /* -MCS: set the smtp_use_size flag; this is useful only when it
2518 precedes -MC (see above) */
2520 else if (Ustrcmp(argrest, "CS") == 0)
2522 smtp_use_size = TRUE;
2526 /* -MCT: set the tls_offered flag; this is useful only when it
2527 precedes -MC (see above). The flag indicates that the host to which
2528 Exim is connected has offered TLS support. */
2531 else if (Ustrcmp(argrest, "CT") == 0)
2538 /* -M[x]: various operations on the following list of message ids:
2539 -M deliver the messages, ignoring next retry times and thawing
2540 -Mc deliver the messages, checking next retry times, no thawing
2541 -Mf freeze the messages
2542 -Mg give up on the messages
2543 -Mt thaw the messages
2544 -Mrm remove the messages
2545 In the above cases, this must be the last option. There are also the
2546 following options which are followed by a single message id, and which
2547 act on that message. Some of them use the "recipient" addresses as well.
2548 -Mar add recipient(s)
2549 -Mmad mark all recipients delivered
2550 -Mmd mark recipients(s) delivered
2552 -Mset load a message for use with -be
2554 -Mvc show copy (of whole message, in RFC 2822 format)
2559 else if (*argrest == 0)
2561 msg_action = MSG_DELIVER;
2562 forced_delivery = deliver_force_thaw = TRUE;
2564 else if (Ustrcmp(argrest, "ar") == 0)
2566 msg_action = MSG_ADD_RECIPIENT;
2567 one_msg_action = TRUE;
2569 else if (Ustrcmp(argrest, "c") == 0) msg_action = MSG_DELIVER;
2570 else if (Ustrcmp(argrest, "es") == 0)
2572 msg_action = MSG_EDIT_SENDER;
2573 one_msg_action = TRUE;
2575 else if (Ustrcmp(argrest, "f") == 0) msg_action = MSG_FREEZE;
2576 else if (Ustrcmp(argrest, "g") == 0)
2578 msg_action = MSG_DELIVER;
2579 deliver_give_up = TRUE;
2581 else if (Ustrcmp(argrest, "mad") == 0)
2583 msg_action = MSG_MARK_ALL_DELIVERED;
2585 else if (Ustrcmp(argrest, "md") == 0)
2587 msg_action = MSG_MARK_DELIVERED;
2588 one_msg_action = TRUE;
2590 else if (Ustrcmp(argrest, "rm") == 0) msg_action = MSG_REMOVE;
2591 else if (Ustrcmp(argrest, "set") == 0)
2593 msg_action = MSG_LOAD;
2594 one_msg_action = TRUE;
2596 else if (Ustrcmp(argrest, "t") == 0) msg_action = MSG_THAW;
2597 else if (Ustrcmp(argrest, "vb") == 0)
2599 msg_action = MSG_SHOW_BODY;
2600 one_msg_action = TRUE;
2602 else if (Ustrcmp(argrest, "vc") == 0)
2604 msg_action = MSG_SHOW_COPY;
2605 one_msg_action = TRUE;
2607 else if (Ustrcmp(argrest, "vh") == 0)
2609 msg_action = MSG_SHOW_HEADER;
2610 one_msg_action = TRUE;
2612 else if (Ustrcmp(argrest, "vl") == 0)
2614 msg_action = MSG_SHOW_LOG;
2615 one_msg_action = TRUE;
2617 else { badarg = TRUE; break; }
2619 /* All the -Mxx options require at least one message id. */
2621 msg_action_arg = i + 1;
2622 if (msg_action_arg >= argc)
2624 fprintf(stderr, "exim: no message ids given after %s option\n", arg);
2625 return EXIT_FAILURE;
2628 /* Some require only message ids to follow */
2630 if (!one_msg_action)
2633 for (j = msg_action_arg; j < argc; j++) if (!mac_ismsgid(argv[j]))
2635 fprintf(stderr, "exim: malformed message id %s after %s option\n",
2637 return EXIT_FAILURE;
2639 goto END_ARG; /* Remaining args are ids */
2642 /* Others require only one message id, possibly followed by addresses,
2643 which will be handled as normal arguments. */
2647 if (!mac_ismsgid(argv[msg_action_arg]))
2649 fprintf(stderr, "exim: malformed message id %s after %s option\n",
2650 argv[msg_action_arg], arg);
2651 return EXIT_FAILURE;
2658 /* Some programs seem to call the -om option without the leading o;
2659 for sendmail it askes for "me too". Exim always does this. */
2662 if (*argrest != 0) badarg = TRUE;
2666 /* -N: don't do delivery - a debugging option that stops transports doing
2667 their thing. It implies debugging at the D_v level. */
2672 dont_deliver = TRUE;
2673 debug_selector |= D_v;
2674 debug_file = stderr;
2680 /* -n: This means "don't alias" in sendmail, apparently. Just ignore
2686 /* -O: Just ignore it. In sendmail, apparently -O option=value means set
2687 option to the specified value. This form uses long names. We need to handle
2688 -O option=value and -Ooption=value. */
2695 fprintf(stderr, "exim: string expected after -O\n");
2703 /* -oA: Set an argument for the bi command (sendmail's "alternate alias
2706 if (*argrest == 'A')
2708 alias_arg = argrest + 1;
2709 if (alias_arg[0] == 0)
2711 if (i+1 < argc) alias_arg = argv[++i]; else
2713 fprintf(stderr, "exim: string expected after -oA\n");
2719 /* -oB: Set a connection message max value for remote deliveries */
2721 else if (*argrest == 'B')
2723 uschar *p = argrest + 1;
2726 if (i+1 < argc && isdigit((argv[i+1][0]))) p = argv[++i]; else
2728 connection_max_messages = 1;
2737 fprintf(stderr, "exim: number expected after -oB\n");
2740 connection_max_messages = Uatoi(p);
2744 /* -odb: background delivery */
2746 else if (Ustrcmp(argrest, "db") == 0)
2748 synchronous_delivery = FALSE;
2749 arg_queue_only = FALSE;
2750 queue_only_set = TRUE;
2753 /* -odf: foreground delivery (smail-compatible option); same effect as
2754 -odi: interactive (synchronous) delivery (sendmail-compatible option)
2757 else if (Ustrcmp(argrest, "df") == 0 || Ustrcmp(argrest, "di") == 0)
2759 synchronous_delivery = TRUE;
2760 arg_queue_only = FALSE;
2761 queue_only_set = TRUE;
2764 /* -odq: queue only */
2766 else if (Ustrcmp(argrest, "dq") == 0)
2768 synchronous_delivery = FALSE;
2769 arg_queue_only = TRUE;
2770 queue_only_set = TRUE;
2773 /* -odqs: queue SMTP only - do local deliveries and remote routing,
2774 but no remote delivery */
2776 else if (Ustrcmp(argrest, "dqs") == 0)
2779 arg_queue_only = FALSE;
2780 queue_only_set = TRUE;
2783 /* -oex: Sendmail error flags. As these are also accepted without the
2784 leading -o prefix, for compatibility with vacation and other callers,
2785 they are handled with -e above. */
2787 /* -oi: Set flag so dot doesn't end non-SMTP input (same as -i)
2788 -oitrue: Another sendmail syntax for the same */
2790 else if (Ustrcmp(argrest, "i") == 0 ||
2791 Ustrcmp(argrest, "itrue") == 0)
2794 /* -oM*: Set various characteristics for an incoming message; actually
2795 acted on for trusted callers only. */
2797 else if (*argrest == 'M')
2801 fprintf(stderr, "exim: data expected after -o%s\n", argrest);
2805 /* -oMa: Set sender host address */
2807 if (Ustrcmp(argrest, "Ma") == 0) sender_host_address = argv[++i];
2809 /* -oMaa: Set authenticator name */
2811 else if (Ustrcmp(argrest, "Maa") == 0)
2812 sender_host_authenticated = argv[++i];
2814 /* -oMas: setting authenticated sender */
2816 else if (Ustrcmp(argrest, "Mas") == 0) authenticated_sender = argv[++i];
2818 /* -oMai: setting authenticated id */
2820 else if (Ustrcmp(argrest, "Mai") == 0) authenticated_id = argv[++i];
2822 /* -oMi: Set incoming interface address */
2824 else if (Ustrcmp(argrest, "Mi") == 0) interface_address = argv[++i];
2826 /* -oMr: Received protocol */
2828 else if (Ustrcmp(argrest, "Mr") == 0) received_protocol = argv[++i];
2830 /* -oMs: Set sender host name */
2832 else if (Ustrcmp(argrest, "Ms") == 0) sender_host_name = argv[++i];
2834 /* -oMt: Set sender ident */
2836 else if (Ustrcmp(argrest, "Mt") == 0)
2838 sender_ident_set = TRUE;
2839 sender_ident = argv[++i];
2842 /* Else a bad argument */
2851 /* -om: Me-too flag for aliases. Exim always does this. Some programs
2852 seem to call this as -m (undocumented), so that is also accepted (see
2855 else if (Ustrcmp(argrest, "m") == 0) {}
2857 /* -oo: An ancient flag for old-style addresses which still seems to
2858 crop up in some calls (see in SCO). */
2860 else if (Ustrcmp(argrest, "o") == 0) {}
2862 /* -oP <name>: set pid file path for daemon */
2864 else if (Ustrcmp(argrest, "P") == 0)
2865 override_pid_file_path = argv[++i];
2867 /* -or <n>: set timeout for non-SMTP acceptance
2868 -os <n>: set timeout for SMTP acceptance */
2870 else if (*argrest == 'r' || *argrest == 's')
2872 int *tp = (*argrest == 'r')?
2873 &arg_receive_timeout : &arg_smtp_receive_timeout;
2874 if (argrest[1] == 0)
2876 if (i+1 < argc) *tp= readconf_readtime(argv[++i], 0, FALSE);
2878 else *tp = readconf_readtime(argrest + 1, 0, FALSE);
2881 fprintf(stderr, "exim: bad time value %s: abandoned\n", argv[i]);
2886 /* -oX <list>: Override local_interfaces and/or default daemon ports */
2888 else if (Ustrcmp(argrest, "X") == 0)
2889 override_local_interfaces = argv[++i];
2891 /* Unknown -o argument */
2897 /* -ps: force Perl startup; -pd force delayed Perl startup */
2901 if (*argrest == 's' && argrest[1] == 0)
2903 perl_start_option = 1;
2906 if (*argrest == 'd' && argrest[1] == 0)
2908 perl_start_option = -1;
2913 /* -panythingelse is taken as the Sendmail-compatible argument -prval:sval,
2914 which sets the host protocol and host name */
2918 if (i+1 < argc) argrest = argv[++i]; else
2919 { badarg = TRUE; break; }
2924 uschar *hn = Ustrchr(argrest, ':');
2927 received_protocol = argrest;
2931 received_protocol = string_copyn(argrest, hn - argrest);
2932 sender_host_name = hn + 1;
2939 receiving_message = FALSE;
2940 if (queue_interval >= 0)
2942 fprintf(stderr, "exim: -q specified more than once\n");
2946 /* -qq...: Do queue runs in a 2-stage manner */
2948 if (*argrest == 'q')
2950 queue_2stage = TRUE;
2954 /* -qi...: Do only first (initial) deliveries */
2956 if (*argrest == 'i')
2958 queue_run_first_delivery = TRUE;
2962 /* -qf...: Run the queue, forcing deliveries
2963 -qff..: Ditto, forcing thawing as well */
2965 if (*argrest == 'f')
2967 queue_run_force = TRUE;
2968 if (*(++argrest) == 'f')
2970 deliver_force_thaw = TRUE;
2975 /* -q[f][f]l...: Run the queue only on local deliveries */
2977 if (*argrest == 'l')
2979 queue_run_local = TRUE;
2983 /* -q[f][f][l]: Run the queue, optionally forced, optionally local only,
2984 optionally starting from a given message id. */
2986 if (*argrest == 0 &&
2987 (i + 1 >= argc || argv[i+1][0] == '-' || mac_ismsgid(argv[i+1])))
2990 if (i+1 < argc && mac_ismsgid(argv[i+1]))
2991 start_queue_run_id = argv[++i];
2992 if (i+1 < argc && mac_ismsgid(argv[i+1]))
2993 stop_queue_run_id = argv[++i];
2996 /* -q[f][f][l]<n>: Run the queue at regular intervals, optionally forced,
2997 optionally local only. */
3002 queue_interval = readconf_readtime(argrest, 0, FALSE);
3004 queue_interval = readconf_readtime(argv[++i], 0, FALSE);
3005 if (queue_interval <= 0)
3007 fprintf(stderr, "exim: bad time value %s: abandoned\n", argv[i]);
3014 case 'R': /* Synonymous with -qR... */
3015 receiving_message = FALSE;
3017 /* -Rf: As -R (below) but force all deliveries,
3018 -Rff: Ditto, but also thaw all frozen messages,
3019 -Rr: String is regex
3020 -Rrf: Regex and force
3021 -Rrff: Regex and force and thaw
3023 in all cases provided there are no further characters in this
3029 for (i = 0; i < sizeof(rsopts)/sizeof(uschar *); i++)
3031 if (Ustrcmp(argrest, rsopts[i]) == 0)
3033 if (i != 2) queue_run_force = TRUE;
3034 if (i >= 2) deliver_selectstring_regex = TRUE;
3035 if (i == 1 || i == 4) deliver_force_thaw = TRUE;
3036 argrest += Ustrlen(rsopts[i]);
3041 /* -R: Set string to match in addresses for forced queue run to
3042 pick out particular messages. */
3046 if (i+1 < argc) deliver_selectstring = argv[++i]; else
3048 fprintf(stderr, "exim: string expected after -R\n");
3052 else deliver_selectstring = argrest;
3056 /* -r: an obsolete synonym for -f (see above) */
3059 /* -S: Like -R but works on sender. */
3061 case 'S': /* Synonymous with -qS... */
3062 receiving_message = FALSE;
3064 /* -Sf: As -S (below) but force all deliveries,
3065 -Sff: Ditto, but also thaw all frozen messages,
3066 -Sr: String is regex
3067 -Srf: Regex and force
3068 -Srff: Regex and force and thaw
3070 in all cases provided there are no further characters in this
3076 for (i = 0; i < sizeof(rsopts)/sizeof(uschar *); i++)
3078 if (Ustrcmp(argrest, rsopts[i]) == 0)
3080 if (i != 2) queue_run_force = TRUE;
3081 if (i >= 2) deliver_selectstring_sender_regex = TRUE;
3082 if (i == 1 || i == 4) deliver_force_thaw = TRUE;
3083 argrest += Ustrlen(rsopts[i]);
3088 /* -S: Set string to match in addresses for forced queue run to
3089 pick out particular messages. */
3093 if (i+1 < argc) deliver_selectstring_sender = argv[++i]; else
3095 fprintf(stderr, "exim: string expected after -S\n");
3099 else deliver_selectstring_sender = argrest;
3102 /* -Tqt is an option that is exclusively for use by the testing suite.
3103 It is not recognized in other circumstances. It allows for the setting up
3104 of explicit "queue times" so that various warning/retry things can be
3105 tested. Otherwise variability of clock ticks etc. cause problems. */
3108 if (running_in_test_harness && Ustrcmp(argrest, "qt") == 0)
3109 fudged_queue_times = argv[++i];
3114 /* -t: Set flag to extract recipients from body of message. */
3117 if (*argrest == 0) extract_recipients = TRUE;
3119 /* -ti: Set flag to extract recipients from body of message, and also
3120 specify that dot does not end the message. */
3122 else if (Ustrcmp(argrest, "i") == 0)
3124 extract_recipients = TRUE;
3128 /* -tls-on-connect: don't wait for STARTTLS (for old clients) */
3131 else if (Ustrcmp(argrest, "ls-on-connect") == 0) tls_on_connect = TRUE;
3138 /* -U: This means "initial user submission" in sendmail, apparently. The
3139 doc claims that in future sendmail may refuse syntactically invalid
3140 messages instead of fixing them. For the moment, we just ignore it. */
3146 /* -v: verify things - this is a very low-level debugging */
3151 debug_selector |= D_v;
3152 debug_file = stderr;
3158 /* -x: AIX uses this to indicate some fancy 8-bit character stuff:
3160 The -x flag tells the sendmail command that mail from a local
3161 mail program has National Language Support (NLS) extended characters
3162 in the body of the mail item. The sendmail command can send mail with
3163 extended NLS characters across networks that normally corrupts these
3166 As Exim is 8-bit clean, it just ignores this flag. */
3169 if (*argrest != 0) badarg = TRUE;
3172 /* All other initial characters are errors */
3177 } /* End of high-level switch statement */
3179 /* Failed to recognize the option, or syntax error */
3183 fprintf(stderr, "exim abandoned: unknown, malformed, or incomplete "
3184 "option %s\n", arg);
3190 /* If -R or -S have been specified without -q, assume a single queue run. */
3192 if ((deliver_selectstring != NULL || deliver_selectstring_sender != NULL) &&
3193 queue_interval < 0) queue_interval = 0;
3197 /* If usage_wanted is set we call the usage function - which never returns */
3198 if (usage_wanted) exim_usage(called_as);
3200 /* Arguments have been processed. Check for incompatibilities. */
3202 (smtp_input || extract_recipients || recipients_arg < argc) &&
3203 (daemon_listen || queue_interval >= 0 || bi_option ||
3204 test_retry_arg >= 0 || test_rewrite_arg >= 0 ||
3205 filter_test != FTEST_NONE || (msg_action_arg > 0 && !one_msg_action))
3208 msg_action_arg > 0 &&
3209 (daemon_listen || queue_interval >= 0 || list_options ||
3210 (checking && msg_action != MSG_LOAD) ||
3211 bi_option || test_retry_arg >= 0 || test_rewrite_arg >= 0)
3214 (daemon_listen || queue_interval >= 0) &&
3215 (sender_address != NULL || list_options || list_queue || checking ||
3219 daemon_listen && queue_interval == 0
3223 (checking || smtp_input || extract_recipients ||
3224 filter_test != FTEST_NONE || bi_option)
3227 verify_address_mode &&
3228 (address_test_mode || smtp_input || extract_recipients ||
3229 filter_test != FTEST_NONE || bi_option)
3232 address_test_mode && (smtp_input || extract_recipients ||
3233 filter_test != FTEST_NONE || bi_option)
3236 smtp_input && (sender_address != NULL || filter_test != FTEST_NONE ||
3240 deliver_selectstring != NULL && queue_interval < 0
3243 msg_action == MSG_LOAD &&
3244 (!expansion_test || expansion_test_message != NULL)
3248 fprintf(stderr, "exim: incompatible command-line options or arguments\n");
3252 /* If debugging is set up, set the file and the file descriptor to pass on to
3253 child processes. It should, of course, be 2 for stderr. Also, force the daemon
3254 to run in the foreground. */
3256 if (debug_selector != 0)
3258 debug_file = stderr;
3259 debug_fd = fileno(debug_file);
3260 background_daemon = FALSE;
3261 if (running_in_test_harness) millisleep(100); /* lets caller finish */
3262 if (debug_selector != D_v) /* -v only doesn't show this */
3264 debug_printf("Exim version %s uid=%ld gid=%ld pid=%d D=%x\n",
3265 version_string, (long int)real_uid, (long int)real_gid, (int)getpid(),
3267 if (!version_printed)
3268 show_whats_supported(stderr);
3272 /* When started with root privilege, ensure that the limits on the number of
3273 open files and the number of processes (where that is accessible) are
3274 sufficiently large, or are unset, in case Exim has been called from an
3275 environment where the limits are screwed down. Not all OS have the ability to
3276 change some of these limits. */
3280 DEBUG(D_any) debug_print_ids(US"Exim has no root privilege:");
3286 #ifdef RLIMIT_NOFILE
3287 if (getrlimit(RLIMIT_NOFILE, &rlp) < 0)
3289 log_write(0, LOG_MAIN|LOG_PANIC, "getrlimit(RLIMIT_NOFILE) failed: %s",
3291 rlp.rlim_cur = rlp.rlim_max = 0;
3294 /* I originally chose 1000 as a nice big number that was unlikely to
3295 be exceeded. It turns out that some older OS have a fixed upper limit of
3298 if (rlp.rlim_cur < 1000)
3300 rlp.rlim_cur = rlp.rlim_max = 1000;
3301 if (setrlimit(RLIMIT_NOFILE, &rlp) < 0)
3303 rlp.rlim_cur = rlp.rlim_max = 256;
3304 if (setrlimit(RLIMIT_NOFILE, &rlp) < 0)
3305 log_write(0, LOG_MAIN|LOG_PANIC, "setrlimit(RLIMIT_NOFILE) failed: %s",
3312 if (getrlimit(RLIMIT_NPROC, &rlp) < 0)
3314 log_write(0, LOG_MAIN|LOG_PANIC, "getrlimit(RLIMIT_NPROC) failed: %s",
3316 rlp.rlim_cur = rlp.rlim_max = 0;
3319 #ifdef RLIM_INFINITY
3320 if (rlp.rlim_cur != RLIM_INFINITY && rlp.rlim_cur < 1000)
3322 rlp.rlim_cur = rlp.rlim_max = RLIM_INFINITY;
3324 if (rlp.rlim_cur < 1000)
3326 rlp.rlim_cur = rlp.rlim_max = 1000;
3328 if (setrlimit(RLIMIT_NPROC, &rlp) < 0)
3329 log_write(0, LOG_MAIN|LOG_PANIC, "setrlimit(RLIMIT_NPROC) failed: %s",
3335 /* Exim is normally entered as root (but some special configurations are
3336 possible that don't do this). However, it always spins off sub-processes that
3337 set their uid and gid as required for local delivery. We don't want to pass on
3338 any extra groups that root may belong to, so we want to get rid of them all at
3341 We need to obey setgroups() at this stage, before possibly giving up root
3342 privilege for a changed configuration file, but later on we might need to
3343 check on the additional groups for the admin user privilege - can't do that
3344 till after reading the config, which might specify the exim gid. Therefore,
3345 save the group list here first. */
3347 group_count = getgroups(NGROUPS_MAX, group_list);
3348 if (group_count < 0)
3350 fprintf(stderr, "exim: getgroups() failed: %s\n", strerror(errno));
3354 /* There is a fundamental difference in some BSD systems in the matter of
3355 groups. FreeBSD and BSDI are known to be different; NetBSD and OpenBSD are
3356 known not to be different. On the "different" systems there is a single group
3357 list, and the first entry in it is the current group. On all other versions of
3358 Unix there is a supplementary group list, which is in *addition* to the current
3359 group. Consequently, to get rid of all extraneous groups on a "standard" system
3360 you pass over 0 groups to setgroups(), while on a "different" system you pass
3361 over a single group - the current group, which is always the first group in the
3362 list. Calling setgroups() with zero groups on a "different" system results in
3363 an error return. The following code should cope with both types of system.
3365 However, if this process isn't running as root, setgroups() can't be used
3366 since you have to be root to run it, even if throwing away groups. Not being
3367 root here happens only in some unusual configurations. We just ignore the
3370 if (setgroups(0, NULL) != 0)
3372 if (setgroups(1, group_list) != 0 && !unprivileged)
3374 fprintf(stderr, "exim: setgroups() failed: %s\n", strerror(errno));
3379 /* If the configuration file name has been altered by an argument on the
3380 command line (either a new file name or a macro definition) and the caller is
3381 not root, or if this is a filter testing run, remove any setuid privilege the
3382 program has and run as the underlying user.
3384 The exim user is locked out of this, which severely restricts the use of -C
3387 Otherwise, set the real ids to the effective values (should be root unless run
3388 from inetd, which it can either be root or the exim uid, if one is configured).
3390 There is a private mechanism for bypassing some of this, in order to make it
3391 possible to test lots of configurations automatically, without having either to
3392 recompile each time, or to patch in an actual configuration file name and other
3393 values (such as the path name). If running in the test harness, pretend that
3394 configuration file changes and macro definitions haven't happened. */
3397 (!trusted_config || /* Config changed, or */
3398 !macros_trusted()) && /* impermissible macros and */
3399 real_uid != root_uid && /* Not root, and */
3400 !running_in_test_harness /* Not fudged */
3402 expansion_test /* expansion testing */
3404 filter_test != FTEST_NONE) /* Filter testing */
3406 setgroups(group_count, group_list);
3407 exim_setugid(real_uid, real_gid, FALSE,
3408 US"-C, -D, -be or -bf forces real uid");
3409 removed_privilege = TRUE;
3411 /* In the normal case when Exim is called like this, stderr is available
3412 and should be used for any logging information because attempts to write
3413 to the log will usually fail. To arrange this, we unset really_exim. However,
3414 if no stderr is available there is no point - we might as well have a go
3415 at the log (if it fails, syslog will be written).
3417 Note that if the invoker is Exim, the logs remain available. Messing with
3418 this causes unlogged successful deliveries. */
3420 if ((log_stderr != NULL) && (real_uid != exim_uid))
3421 really_exim = FALSE;
3424 /* Privilege is to be retained for the moment. It may be dropped later,
3425 depending on the job that this Exim process has been asked to do. For now, set
3426 the real uid to the effective so that subsequent re-execs of Exim are done by a
3429 else exim_setugid(geteuid(), getegid(), FALSE, US"forcing real = effective");
3431 /* If testing a filter, open the file(s) now, before wasting time doing other
3432 setups and reading the message. */
3434 if ((filter_test & FTEST_SYSTEM) != 0)
3436 filter_sfd = Uopen(filter_test_sfile, O_RDONLY, 0);
3439 fprintf(stderr, "exim: failed to open %s: %s\n", filter_test_sfile,
3441 return EXIT_FAILURE;
3445 if ((filter_test & FTEST_USER) != 0)
3447 filter_ufd = Uopen(filter_test_ufile, O_RDONLY, 0);
3450 fprintf(stderr, "exim: failed to open %s: %s\n", filter_test_ufile,
3452 return EXIT_FAILURE;
3456 /* Read the main runtime configuration data; this gives up if there
3457 is a failure. It leaves the configuration file open so that the subsequent
3458 configuration data for delivery can be read if needed. */
3462 /* Handle the decoding of logging options. */
3464 decode_bits(&log_write_selector, &log_extra_selector, 0, 0,
3465 log_selector_string, log_options, log_options_count, US"log", 0);
3469 debug_printf("configuration file is %s\n", config_main_filename);
3470 debug_printf("log selectors = %08x %08x\n", log_write_selector,
3471 log_extra_selector);
3474 /* If domain literals are not allowed, check the sender address that was
3475 supplied with -f. Ditto for a stripped trailing dot. */
3477 if (sender_address != NULL)
3479 if (sender_address[sender_address_domain] == '[' && !allow_domain_literals)
3481 fprintf(stderr, "exim: bad -f address \"%s\": domain literals not "
3482 "allowed\n", sender_address);
3483 return EXIT_FAILURE;
3485 if (f_end_dot && !strip_trailing_dot)
3487 fprintf(stderr, "exim: bad -f address \"%s.\": domain is malformed "
3488 "(trailing dot not allowed)\n", sender_address);
3489 return EXIT_FAILURE;
3493 /* Paranoia check of maximum lengths of certain strings. There is a check
3494 on the length of the log file path in log.c, which will come into effect
3495 if there are any calls to write the log earlier than this. However, if we
3496 get this far but the string is very long, it is better to stop now than to
3497 carry on and (e.g.) receive a message and then have to collapse. The call to
3498 log_write() from here will cause the ultimate panic collapse if the complete
3499 file name exceeds the buffer length. */
3501 if (Ustrlen(log_file_path) > 200)
3502 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3503 "log_file_path is longer than 200 chars: aborting");
3505 if (Ustrlen(pid_file_path) > 200)
3506 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3507 "pid_file_path is longer than 200 chars: aborting");
3509 if (Ustrlen(spool_directory) > 200)
3510 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3511 "spool_directory is longer than 200 chars: aborting");
3513 /* Length check on the process name given to syslog for its TAG field,
3514 which is only permitted to be 32 characters or less. See RFC 3164. */
3516 if (Ustrlen(syslog_processname) > 32)
3517 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3518 "syslog_processname is longer than 32 chars: aborting");
3520 /* In some operating systems, the environment variable TMPDIR controls where
3521 temporary files are created; Exim doesn't use these (apart from when delivering
3522 to MBX mailboxes), but called libraries such as DBM libraries may require them.
3523 If TMPDIR is found in the environment, reset it to the value defined in the
3524 TMPDIR macro, if this macro is defined. */
3529 for (p = USS environ; *p != NULL; p++)
3531 if (Ustrncmp(*p, "TMPDIR=", 7) == 0 &&
3532 Ustrcmp(*p+7, TMPDIR) != 0)
3534 uschar *newp = malloc(Ustrlen(TMPDIR) + 8);
3535 sprintf(CS newp, "TMPDIR=%s", TMPDIR);
3537 DEBUG(D_any) debug_printf("reset TMPDIR=%s in environment\n", TMPDIR);
3543 /* Timezone handling. If timezone_string is "utc", set a flag to cause all
3544 timestamps to be in UTC (gmtime() is used instead of localtime()). Otherwise,
3545 we may need to get rid of a bogus timezone setting. This can arise when Exim is
3546 called by a user who has set the TZ variable. This then affects the timestamps
3547 in log files and in Received: headers, and any created Date: header lines. The
3548 required timezone is settable in the configuration file, so nothing can be done
3549 about this earlier - but hopefully nothing will normally be logged earlier than
3550 this. We have to make a new environment if TZ is wrong, but don't bother if
3551 timestamps_utc is set, because then all times are in UTC anyway. */
3553 if (timezone_string != NULL && strcmpic(timezone_string, US"UTC") == 0)
3555 timestamps_utc = TRUE;
3559 uschar *envtz = US getenv("TZ");
3560 if ((envtz == NULL && timezone_string != NULL) ||
3562 (timezone_string == NULL ||
3563 Ustrcmp(timezone_string, envtz) != 0)))
3565 uschar **p = USS environ;
3569 while (*p++ != NULL) count++;
3570 if (envtz == NULL) count++;
3571 newp = new = malloc(sizeof(uschar *) * (count + 1));
3572 for (p = USS environ; *p != NULL; p++)
3574 if (Ustrncmp(*p, "TZ=", 3) == 0) continue;
3577 if (timezone_string != NULL)
3579 *newp = malloc(Ustrlen(timezone_string) + 4);
3580 sprintf(CS *newp++, "TZ=%s", timezone_string);
3585 DEBUG(D_any) debug_printf("Reset TZ to %s: time is %s\n", timezone_string,
3586 tod_stamp(tod_log));
3590 /* Handle the case when we have removed the setuid privilege because of -C or
3591 -D. This means that the caller of Exim was not root.
3593 There is a problem if we were running as the Exim user. The sysadmin may
3594 expect this case to retain privilege because "the binary was called by the
3595 Exim user", but it hasn't, because either the -D option set macros, or the
3596 -C option set a non-trusted configuration file. There are two possibilities:
3598 (1) If deliver_drop_privilege is set, Exim is not going to re-exec in order
3599 to do message deliveries. Thus, the fact that it is running as a
3600 non-privileged user is plausible, and might be wanted in some special
3601 configurations. However, really_exim will have been set false when
3602 privilege was dropped, to stop Exim trying to write to its normal log
3603 files. Therefore, re-enable normal log processing, assuming the sysadmin
3604 has set up the log directory correctly.
3606 (2) If deliver_drop_privilege is not set, the configuration won't work as
3607 apparently intended, and so we log a panic message. In order to retain
3608 root for -C or -D, the caller must either be root or be invoking a
3609 trusted configuration file (when deliver_drop_privilege is false). */
3611 if (removed_privilege && (!trusted_config || macros != NULL) &&
3612 real_uid == exim_uid)
3614 if (deliver_drop_privilege)
3615 really_exim = TRUE; /* let logging work normally */
3617 log_write(0, LOG_MAIN|LOG_PANIC,
3618 "exim user lost privilege for using %s option",
3619 trusted_config? "-D" : "-C");
3622 /* Start up Perl interpreter if Perl support is configured and there is a
3623 perl_startup option, and the configuration or the command line specifies
3624 initializing starting. Note that the global variables are actually called
3625 opt_perl_xxx to avoid clashing with perl's namespace (perl_*). */
3628 if (perl_start_option != 0)
3629 opt_perl_at_start = (perl_start_option > 0);
3630 if (opt_perl_at_start && opt_perl_startup != NULL)
3633 DEBUG(D_any) debug_printf("Starting Perl interpreter\n");
3634 errstr = init_perl(opt_perl_startup);
3637 fprintf(stderr, "exim: error in perl_startup code: %s\n", errstr);
3638 return EXIT_FAILURE;
3640 opt_perl_started = TRUE;
3642 #endif /* EXIM_PERL */
3644 /* Initialise lookup_list
3645 If debugging, already called above via version reporting.
3646 This does mean that debugging causes the list to be initialised while root.
3647 This *should* be harmless -- all modules are loaded from a fixed dir and
3648 it's code that would, if not a module, be part of Exim already. */
3651 /* Log the arguments of the call if the configuration file said so. This is
3652 a debugging feature for finding out what arguments certain MUAs actually use.
3653 Don't attempt it if logging is disabled, or if listing variables or if
3654 verifying/testing addresses or expansions. */
3656 if (((debug_selector & D_any) != 0 || (log_extra_selector & LX_arguments) != 0)
3657 && really_exim && !list_options && !checking)
3660 uschar *p = big_buffer;
3662 (void)getcwd(CS p+4, big_buffer_size - 4);
3664 (void)string_format(p, big_buffer_size - (p - big_buffer), " %d args:", argc);
3666 for (i = 0; i < argc; i++)
3668 int len = Ustrlen(argv[i]);
3671 if (p + len + 8 >= big_buffer + big_buffer_size)
3674 log_write(0, LOG_MAIN, "%s", big_buffer);
3675 Ustrcpy(big_buffer, "...");
3678 printing = string_printing(argv[i]);
3679 if (printing[0] == 0) quote = US"\""; else
3681 uschar *pp = printing;
3683 while (*pp != 0) if (isspace(*pp++)) { quote = US"\""; break; }
3685 sprintf(CS p, " %s%.*s%s", quote, (int)(big_buffer_size -
3686 (p - big_buffer) - 4), printing, quote);
3690 if ((log_extra_selector & LX_arguments) != 0)
3691 log_write(0, LOG_MAIN, "%s", big_buffer);
3693 debug_printf("%s\n", big_buffer);
3696 /* Set the working directory to be the top-level spool directory. We don't rely
3697 on this in the code, which always uses fully qualified names, but it's useful
3698 for core dumps etc. Don't complain if it fails - the spool directory might not
3699 be generally accessible and calls with the -C option (and others) have lost
3700 privilege by now. Before the chdir, we try to ensure that the directory exists.
3703 if (Uchdir(spool_directory) != 0)
3705 (void)directory_make(spool_directory, US"", SPOOL_DIRECTORY_MODE, FALSE);
3706 (void)Uchdir(spool_directory);
3709 /* Handle calls with the -bi option. This is a sendmail option to rebuild *the*
3710 alias file. Exim doesn't have such a concept, but this call is screwed into
3711 Sun's YP makefiles. Handle this by calling a configured script, as the real
3712 user who called Exim. The -oA option can be used to pass an argument to the
3717 (void)fclose(config_file);
3718 if (bi_command != NULL)
3722 argv[i++] = bi_command;
3723 if (alias_arg != NULL) argv[i++] = alias_arg;
3726 setgroups(group_count, group_list);
3727 exim_setugid(real_uid, real_gid, FALSE, US"running bi_command");
3729 DEBUG(D_exec) debug_printf("exec %.256s %.256s\n", argv[0],
3730 (argv[1] == NULL)? US"" : argv[1]);
3732 execv(CS argv[0], (char *const *)argv);
3733 fprintf(stderr, "exim: exec failed: %s\n", strerror(errno));
3738 DEBUG(D_any) debug_printf("-bi used but bi_command not set; exiting\n");
3743 /* If an action on specific messages is requested, or if a daemon or queue
3744 runner is being started, we need to know if Exim was called by an admin user.
3745 This is the case if the real user is root or exim, or if the real group is
3746 exim, or if one of the supplementary groups is exim or a group listed in
3747 admin_groups. We don't fail all message actions immediately if not admin_user,
3748 since some actions can be performed by non-admin users. Instead, set admin_user
3749 for later interrogation. */
3751 if (real_uid == root_uid || real_uid == exim_uid || real_gid == exim_gid)
3756 for (i = 0; i < group_count; i++)
3758 if (group_list[i] == exim_gid) admin_user = TRUE;
3759 else if (admin_groups != NULL)
3761 for (j = 1; j <= (int)(admin_groups[0]); j++)
3762 if (admin_groups[j] == group_list[i])
3763 { admin_user = TRUE; break; }
3765 if (admin_user) break;
3769 /* Another group of privileged users are the trusted users. These are root,
3770 exim, and any caller matching trusted_users or trusted_groups. Trusted callers
3771 are permitted to specify sender_addresses with -f on the command line, and
3772 other message parameters as well. */
3774 if (real_uid == root_uid || real_uid == exim_uid)
3775 trusted_caller = TRUE;
3780 if (trusted_users != NULL)
3782 for (i = 1; i <= (int)(trusted_users[0]); i++)
3783 if (trusted_users[i] == real_uid)
3784 { trusted_caller = TRUE; break; }
3787 if (!trusted_caller && trusted_groups != NULL)
3789 for (i = 1; i <= (int)(trusted_groups[0]); i++)
3791 if (trusted_groups[i] == real_gid)
3792 trusted_caller = TRUE;
3793 else for (j = 0; j < group_count; j++)
3795 if (trusted_groups[i] == group_list[j])
3796 { trusted_caller = TRUE; break; }
3798 if (trusted_caller) break;
3803 if (trusted_caller) DEBUG(D_any) debug_printf("trusted user\n");
3804 if (admin_user) DEBUG(D_any) debug_printf("admin user\n");
3806 /* Only an admin user may start the daemon or force a queue run in the default
3807 configuration, but the queue run restriction can be relaxed. Only an admin
3808 user may request that a message be returned to its sender forthwith. Only an
3809 admin user may specify a debug level greater than D_v (because it might show
3810 passwords, etc. in lookup queries). Only an admin user may request a queue
3811 count. Only an admin user can use the test interface to scan for email
3812 (because Exim will be in the spool dir and able to look at mails). */
3816 BOOL debugset = (debug_selector & ~D_v) != 0;
3817 if (deliver_give_up || daemon_listen || malware_test_file ||
3818 (count_queue && queue_list_requires_admin) ||
3819 (list_queue && queue_list_requires_admin) ||
3820 (queue_interval >= 0 && prod_requires_admin) ||
3821 (debugset && !running_in_test_harness))
3823 fprintf(stderr, "exim:%s permission denied\n", debugset? " debugging" : "");
3828 /* If the real user is not root or the exim uid, the argument for passing
3829 in an open TCP/IP connection for another message is not permitted, nor is
3830 running with the -N option for any delivery action, unless this call to exim is
3831 one that supplied an input message, or we are using a patched exim for
3832 regression testing. */
3834 if (real_uid != root_uid && real_uid != exim_uid &&
3835 (continue_hostname != NULL ||
3837 (queue_interval >= 0 || daemon_listen || msg_action_arg > 0)
3838 )) && !running_in_test_harness)
3840 fprintf(stderr, "exim: Permission denied\n");
3841 return EXIT_FAILURE;
3844 /* If the caller is not trusted, certain arguments are ignored when running for
3845 real, but are permitted when checking things (-be, -bv, -bt, -bh, -bf, -bF).
3846 Note that authority for performing certain actions on messages is tested in the
3847 queue_action() function. */
3849 if (!trusted_caller && !checking && filter_test == FTEST_NONE)
3851 sender_host_name = sender_host_address = interface_address =
3852 sender_ident = received_protocol = NULL;
3853 sender_host_port = interface_port = 0;
3854 sender_host_authenticated = authenticated_sender = authenticated_id = NULL;
3857 /* If a sender host address is set, extract the optional port number off the
3858 end of it and check its syntax. Do the same thing for the interface address.
3859 Exim exits if the syntax is bad. */
3863 if (sender_host_address != NULL)
3864 sender_host_port = check_port(sender_host_address);
3865 if (interface_address != NULL)
3866 interface_port = check_port(interface_address);
3869 /* If an SMTP message is being received check to see if the standard input is a
3870 TCP/IP socket. If it is, we assume that Exim was called from inetd if the
3871 caller is root or the Exim user, or if the port is a privileged one. Otherwise,
3876 union sockaddr_46 inetd_sock;
3877 EXIM_SOCKLEN_T size = sizeof(inetd_sock);
3878 if (getpeername(0, (struct sockaddr *)(&inetd_sock), &size) == 0)
3880 int family = ((struct sockaddr *)(&inetd_sock))->sa_family;
3881 if (family == AF_INET || family == AF_INET6)
3883 union sockaddr_46 interface_sock;
3884 size = sizeof(interface_sock);
3886 if (getsockname(0, (struct sockaddr *)(&interface_sock), &size) == 0)
3887 interface_address = host_ntoa(-1, &interface_sock, NULL,
3890 if (host_is_tls_on_connect_port(interface_port)) tls_on_connect = TRUE;
3892 if (real_uid == root_uid || real_uid == exim_uid || interface_port < 1024)
3895 sender_host_address = host_ntoa(-1, (struct sockaddr *)(&inetd_sock),
3896 NULL, &sender_host_port);
3897 if (mua_wrapper) log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Input from "
3898 "inetd is not supported when mua_wrapper is set");
3903 "exim: Permission denied (unprivileged user, unprivileged port)\n");
3904 return EXIT_FAILURE;
3910 /* If the load average is going to be needed while receiving a message, get it
3911 now for those OS that require the first call to os_getloadavg() to be done as
3912 root. There will be further calls later for each message received. */
3914 #ifdef LOAD_AVG_NEEDS_ROOT
3915 if (receiving_message &&
3916 (queue_only_load >= 0 ||
3917 (is_inetd && smtp_load_reserve >= 0)
3920 load_average = OS_GETLOADAVG();
3924 /* The queue_only configuration option can be overridden by -odx on the command
3925 line, except that if queue_only_override is false, queue_only cannot be unset
3926 from the command line. */
3928 if (queue_only_set && (queue_only_override || arg_queue_only))
3929 queue_only = arg_queue_only;
3931 /* The receive_timeout and smtp_receive_timeout options can be overridden by
3934 if (arg_receive_timeout >= 0) receive_timeout = arg_receive_timeout;
3935 if (arg_smtp_receive_timeout >= 0)
3936 smtp_receive_timeout = arg_smtp_receive_timeout;
3938 /* If Exim was started with root privilege, unless we have already removed the
3939 root privilege above as a result of -C, -D, -be, -bf or -bF, remove it now
3940 except when starting the daemon or doing some kind of delivery or address
3941 testing (-bt). These are the only cases when root need to be retained. We run
3942 as exim for -bv and -bh. However, if deliver_drop_privilege is set, root is
3943 retained only for starting the daemon. We always do the initgroups() in this
3944 situation (controlled by the TRUE below), in order to be as close as possible
3945 to the state Exim usually runs in. */
3947 if (!unprivileged && /* originally had root AND */
3948 !removed_privilege && /* still got root AND */
3949 !daemon_listen && /* not starting the daemon */
3950 queue_interval <= 0 && /* (either kind of daemon) */
3952 deliver_drop_privilege || /* requested unprivileged */
3954 queue_interval < 0 && /* not running the queue */
3955 (msg_action_arg < 0 || /* and */
3956 msg_action != MSG_DELIVER) && /* not delivering and */
3957 (!checking || !address_test_mode) /* not address checking */
3961 exim_setugid(exim_uid, exim_gid, TRUE, US"privilege not needed");
3964 /* When we are retaining a privileged uid, we still change to the exim gid. */
3969 rv = setgid(exim_gid);
3970 /* Impact of failure is that some stuff might end up with an incorrect group.
3971 We track this for failures from root, since any attempt to change privilege
3972 by root should succeed and failures should be examined. For non-root,
3973 there's no security risk. For me, it's { exim -bV } on a just-built binary,
3974 no need to complain then. */
3977 if (!(unprivileged || removed_privilege))
3980 "exim: changing group failed: %s\n", strerror(errno));
3984 DEBUG(D_any) debug_printf("changing group to %ld failed: %s\n",
3985 (long int)exim_gid, strerror(errno));
3989 /* Handle a request to scan a file for malware */
3990 if (malware_test_file)
3992 #ifdef WITH_CONTENT_SCAN
3994 set_process_info("scanning file for malware");
3995 result = malware_in_file(malware_test_file);
3998 printf("No malware found.\n");
4003 printf("Malware lookup returned non-okay/fail: %d\n", result);
4007 printf("Malware found: %s\n", malware_name);
4009 printf("Malware scan detected malware of unknown name.\n");
4011 printf("Malware scanning not enabled at compile time.\n");
4016 /* Handle a request to list the delivery queue */
4020 set_process_info("listing the queue");
4021 queue_list(list_queue_option, argv + recipients_arg, argc - recipients_arg);
4025 /* Handle a request to count the delivery queue */
4029 set_process_info("counting the queue");
4034 /* Handle actions on specific messages, except for the force delivery and
4035 message load actions, which are done below. Some actions take a whole list of
4036 message ids, which are known to continue up to the end of the arguments. Others
4037 take a single message id and then operate on the recipients list. */
4039 if (msg_action_arg > 0 && msg_action != MSG_DELIVER && msg_action != MSG_LOAD)
4041 int yield = EXIT_SUCCESS;
4042 set_process_info("acting on specified messages");
4044 if (!one_msg_action)
4046 for (i = msg_action_arg; i < argc; i++)
4047 if (!queue_action(argv[i], msg_action, NULL, 0, 0))
4048 yield = EXIT_FAILURE;
4051 else if (!queue_action(argv[msg_action_arg], msg_action, argv, argc,
4052 recipients_arg)) yield = EXIT_FAILURE;
4056 /* All the modes below here require the remaining configuration sections
4057 to be read, except that we can skip over the ACL setting when delivering
4058 specific messages, or doing a queue run. (For various testing cases we could
4059 skip too, but as they are rare, it doesn't really matter.) The argument is TRUE
4062 readconf_rest(msg_action_arg > 0 || (queue_interval == 0 && !daemon_listen));
4064 /* The configuration data will have been read into POOL_PERM because we won't
4065 ever want to reset back past it. Change the current pool to POOL_MAIN. In fact,
4066 this is just a bit of pedantic tidiness. It wouldn't really matter if the
4067 configuration were read into POOL_MAIN, because we don't do any resets till
4068 later on. However, it seems right, and it does ensure that both pools get used.
4071 store_pool = POOL_MAIN;
4073 /* Handle the -brt option. This is for checking out retry configurations.
4074 The next three arguments are a domain name or a complete address, and
4075 optionally two error numbers. All it does is to call the function that
4076 scans the retry configuration data. */
4078 if (test_retry_arg >= 0)
4080 retry_config *yield;
4081 int basic_errno = 0;
4085 if (test_retry_arg >= argc)
4087 printf("-brt needs a domain or address argument\n");
4088 exim_exit(EXIT_FAILURE);
4090 s1 = argv[test_retry_arg++];
4093 /* If the first argument contains no @ and no . it might be a local user
4094 or it might be a single-component name. Treat as a domain. */
4096 if (Ustrchr(s1, '@') == NULL && Ustrchr(s1, '.') == NULL)
4098 printf("Warning: \"%s\" contains no '@' and no '.' characters. It is "
4099 "being \ntreated as a one-component domain, not as a local part.\n\n",
4103 /* There may be an optional second domain arg. */
4105 if (test_retry_arg < argc && Ustrchr(argv[test_retry_arg], '.') != NULL)
4106 s2 = argv[test_retry_arg++];
4108 /* The final arg is an error name */
4110 if (test_retry_arg < argc)
4112 uschar *ss = argv[test_retry_arg];
4114 readconf_retry_error(ss, ss + Ustrlen(ss), &basic_errno, &more_errno);
4117 printf("%s\n", CS error);
4118 return EXIT_FAILURE;
4121 /* For the {MAIL,RCPT,DATA}_4xx errors, a value of 255 means "any", and a
4122 code > 100 as an error is for matching codes to the decade. Turn them into
4123 a real error code, off the decade. */
4125 if (basic_errno == ERRNO_MAIL4XX ||
4126 basic_errno == ERRNO_RCPT4XX ||
4127 basic_errno == ERRNO_DATA4XX)
4129 int code = (more_errno >> 8) & 255;
4131 more_errno = (more_errno & 0xffff00ff) | (21 << 8);
4132 else if (code > 100)
4133 more_errno = (more_errno & 0xffff00ff) | ((code - 96) << 8);
4137 yield = retry_find_config(s1, s2, basic_errno, more_errno);
4138 if (yield == NULL) printf("No retry information found\n"); else
4141 more_errno = yield->more_errno;
4142 printf("Retry rule: %s ", yield->pattern);
4144 if (yield->basic_errno == ERRNO_EXIMQUOTA)
4146 printf("quota%s%s ",
4147 (more_errno > 0)? "_" : "",
4148 (more_errno > 0)? readconf_printtime(more_errno) : US"");
4150 else if (yield->basic_errno == ECONNREFUSED)
4152 printf("refused%s%s ",
4153 (more_errno > 0)? "_" : "",
4154 (more_errno == 'M')? "MX" :
4155 (more_errno == 'A')? "A" : "");
4157 else if (yield->basic_errno == ETIMEDOUT)
4160 if ((more_errno & RTEF_CTOUT) != 0) printf("_connect");
4162 if (more_errno != 0) printf("_%s",
4163 (more_errno == 'M')? "MX" : "A");
4166 else if (yield->basic_errno == ERRNO_AUTHFAIL)
4167 printf("auth_failed ");
4170 for (r = yield->rules; r != NULL; r = r->next)
4172 printf("%c,%s", r->rule, readconf_printtime(r->timeout)); /* Do not */
4173 printf(",%s", readconf_printtime(r->p1)); /* amalgamate */
4179 printf(",%d.", x/1000);
4193 exim_exit(EXIT_SUCCESS);
4196 /* Handle a request to list one or more configuration options */
4200 set_process_info("listing variables");
4201 if (recipients_arg >= argc) readconf_print(US"all", NULL);
4202 else for (i = recipients_arg; i < argc; i++)
4205 (Ustrcmp(argv[i], "router") == 0 ||
4206 Ustrcmp(argv[i], "transport") == 0 ||
4207 Ustrcmp(argv[i], "authenticator") == 0 ||
4208 Ustrcmp(argv[i], "macro") == 0))
4210 readconf_print(argv[i+1], argv[i]);
4213 else readconf_print(argv[i], NULL);
4215 exim_exit(EXIT_SUCCESS);
4219 /* Handle a request to deliver one or more messages that are already on the
4220 queue. Values of msg_action other than MSG_DELIVER and MSG_LOAD are dealt with
4221 above. MSG_LOAD is handled with -be (which is the only time it applies) below.
4223 Delivery of specific messages is typically used for a small number when
4224 prodding by hand (when the option forced_delivery will be set) or when
4225 re-execing to regain root privilege. Each message delivery must happen in a
4226 separate process, so we fork a process for each one, and run them sequentially
4227 so that debugging output doesn't get intertwined, and to avoid spawning too
4228 many processes if a long list is given. However, don't fork for the last one;
4229 this saves a process in the common case when Exim is called to deliver just one
4232 if (msg_action_arg > 0 && msg_action != MSG_LOAD)
4234 if (prod_requires_admin && !admin_user)
4236 fprintf(stderr, "exim: Permission denied\n");
4237 exim_exit(EXIT_FAILURE);
4239 set_process_info("delivering specified messages");
4240 if (deliver_give_up) forced_delivery = deliver_force_thaw = TRUE;
4241 for (i = msg_action_arg; i < argc; i++)
4246 (void)deliver_message(argv[i], forced_delivery, deliver_give_up);
4247 else if ((pid = fork()) == 0)
4249 (void)deliver_message(argv[i], forced_delivery, deliver_give_up);
4250 _exit(EXIT_SUCCESS);
4254 fprintf(stderr, "failed to fork delivery process for %s: %s\n", argv[i],
4256 exim_exit(EXIT_FAILURE);
4260 exim_exit(EXIT_SUCCESS);
4264 /* If only a single queue run is requested, without SMTP listening, we can just
4265 turn into a queue runner, with an optional starting message id. */
4267 if (queue_interval == 0 && !daemon_listen)
4269 DEBUG(D_queue_run) debug_printf("Single queue run%s%s%s%s\n",
4270 (start_queue_run_id == NULL)? US"" : US" starting at ",
4271 (start_queue_run_id == NULL)? US"" : start_queue_run_id,
4272 (stop_queue_run_id == NULL)? US"" : US" stopping at ",
4273 (stop_queue_run_id == NULL)? US"" : stop_queue_run_id);
4274 set_process_info("running the queue (single queue run)");
4275 queue_run(start_queue_run_id, stop_queue_run_id, FALSE);
4276 exim_exit(EXIT_SUCCESS);
4280 /* Find the login name of the real user running this process. This is always
4281 needed when receiving a message, because it is written into the spool file. It
4282 may also be used to construct a from: or a sender: header, and in this case we
4283 need the user's full name as well, so save a copy of it, checked for RFC822
4284 syntax and munged if necessary, if it hasn't previously been set by the -F
4285 argument. We may try to get the passwd entry more than once, in case NIS or
4286 other delays are in evidence. Save the home directory for use in filter testing
4291 if ((pw = getpwuid(real_uid)) != NULL)
4293 originator_login = string_copy(US pw->pw_name);
4294 originator_home = string_copy(US pw->pw_dir);
4296 /* If user name has not been set by -F, set it from the passwd entry
4297 unless -f has been used to set the sender address by a trusted user. */
4299 if (originator_name == NULL)
4301 if (sender_address == NULL ||
4302 (!trusted_caller && filter_test == FTEST_NONE))
4304 uschar *name = US pw->pw_gecos;
4305 uschar *amp = Ustrchr(name, '&');
4308 /* Most Unix specify that a '&' character in the gecos field is
4309 replaced by a copy of the login name, and some even specify that
4310 the first character should be upper cased, so that's what we do. */
4315 string_format(buffer, sizeof(buffer), "%.*s%n%s%s",
4316 amp - name, name, &loffset, originator_login, amp + 1);
4317 buffer[loffset] = toupper(buffer[loffset]);
4321 /* If a pattern for matching the gecos field was supplied, apply
4322 it and then expand the name string. */
4324 if (gecos_pattern != NULL && gecos_name != NULL)
4327 re = regex_must_compile(gecos_pattern, FALSE, TRUE); /* Use malloc */
4329 if (regex_match_and_setup(re, name, 0, -1))
4331 uschar *new_name = expand_string(gecos_name);
4333 if (new_name != NULL)
4335 DEBUG(D_receive) debug_printf("user name \"%s\" extracted from "
4336 "gecos field \"%s\"\n", new_name, name);
4339 else DEBUG(D_receive) debug_printf("failed to expand gecos_name string "
4340 "\"%s\": %s\n", gecos_name, expand_string_message);
4342 else DEBUG(D_receive) debug_printf("gecos_pattern \"%s\" did not match "
4343 "gecos field \"%s\"\n", gecos_pattern, name);
4344 store_free((void *)re);
4346 originator_name = string_copy(name);
4349 /* A trusted caller has used -f but not -F */
4351 else originator_name = US"";
4354 /* Break the retry loop */
4359 if (++i > finduser_retries) break;
4363 /* If we cannot get a user login, log the incident and give up, unless the
4364 configuration specifies something to use. When running in the test harness,
4365 any setting of unknown_login overrides the actual name. */
4367 if (originator_login == NULL || running_in_test_harness)
4369 if (unknown_login != NULL)
4371 originator_login = expand_string(unknown_login);
4372 if (originator_name == NULL && unknown_username != NULL)
4373 originator_name = expand_string(unknown_username);
4374 if (originator_name == NULL) originator_name = US"";
4376 if (originator_login == NULL)
4377 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Failed to get user name for uid %d",
4381 /* Ensure that the user name is in a suitable form for use as a "phrase" in an
4384 originator_name = string_copy(parse_fix_phrase(originator_name,
4385 Ustrlen(originator_name), big_buffer, big_buffer_size));
4387 /* If a message is created by this call of Exim, the uid/gid of its originator
4388 are those of the caller. These values are overridden if an existing message is
4389 read in from the spool. */
4391 originator_uid = real_uid;
4392 originator_gid = real_gid;
4394 DEBUG(D_receive) debug_printf("originator: uid=%d gid=%d login=%s name=%s\n",
4395 (int)originator_uid, (int)originator_gid, originator_login, originator_name);
4397 /* Run in daemon and/or queue-running mode. The function daemon_go() never
4398 returns. We leave this till here so that the originator_ fields are available
4399 for incoming messages via the daemon. The daemon cannot be run in mua_wrapper
4402 if (daemon_listen || queue_interval > 0)
4406 fprintf(stderr, "Daemon cannot be run when mua_wrapper is set\n");
4407 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Daemon cannot be run when "
4408 "mua_wrapper is set");
4413 /* If the sender ident has not been set (by a trusted caller) set it to
4414 the caller. This will get overwritten below for an inetd call. If a trusted
4415 caller has set it empty, unset it. */
4417 if (sender_ident == NULL) sender_ident = originator_login;
4418 else if (sender_ident[0] == 0) sender_ident = NULL;
4420 /* Handle the -brw option, which is for checking out rewriting rules. Cause log
4421 writes (on errors) to go to stderr instead. Can't do this earlier, as want the
4422 originator_* variables set. */
4424 if (test_rewrite_arg >= 0)
4426 really_exim = FALSE;
4427 if (test_rewrite_arg >= argc)
4429 printf("-brw needs an address argument\n");
4430 exim_exit(EXIT_FAILURE);
4432 rewrite_test(argv[test_rewrite_arg]);
4433 exim_exit(EXIT_SUCCESS);
4436 /* A locally-supplied message is considered to be coming from a local user
4437 unless a trusted caller supplies a sender address with -f, or is passing in the
4438 message via SMTP (inetd invocation or otherwise). */
4440 if ((sender_address == NULL && !smtp_input) ||
4441 (!trusted_caller && filter_test == FTEST_NONE))
4443 sender_local = TRUE;
4445 /* A trusted caller can supply authenticated_sender and authenticated_id
4446 via -oMas and -oMai and if so, they will already be set. Otherwise, force
4447 defaults except when host checking. */
4449 if (authenticated_sender == NULL && !host_checking)
4450 authenticated_sender = string_sprintf("%s@%s", originator_login,
4451 qualify_domain_sender);
4452 if (authenticated_id == NULL && !host_checking)
4453 authenticated_id = originator_login;
4456 /* Trusted callers are always permitted to specify the sender address.
4457 Untrusted callers may specify it if it matches untrusted_set_sender, or if what
4458 is specified is the empty address. However, if a trusted caller does not
4459 specify a sender address for SMTP input, we leave sender_address unset. This
4460 causes the MAIL commands to be honoured. */
4462 if ((!smtp_input && sender_address == NULL) ||
4463 !receive_check_set_sender(sender_address))
4465 /* Either the caller is not permitted to set a general sender, or this is
4466 non-SMTP input and the trusted caller has not set a sender. If there is no
4467 sender, or if a sender other than <> is set, override with the originator's
4468 login (which will get qualified below), except when checking things. */
4470 if (sender_address == NULL /* No sender_address set */
4472 (sender_address[0] != 0 && /* Non-empty sender address, AND */
4473 !checking && /* Not running tests, AND */
4474 filter_test == FTEST_NONE)) /* Not testing a filter */
4476 sender_address = originator_login;
4477 sender_address_forced = FALSE;
4478 sender_address_domain = 0;
4482 /* Remember whether an untrusted caller set the sender address */
4484 sender_set_untrusted = sender_address != originator_login && !trusted_caller;
4486 /* Ensure that the sender address is fully qualified unless it is the empty
4487 address, which indicates an error message, or doesn't exist (root caller, smtp
4488 interface, no -f argument). */
4490 if (sender_address != NULL && sender_address[0] != 0 &&
4491 sender_address_domain == 0)
4492 sender_address = string_sprintf("%s@%s", local_part_quote(sender_address),
4493 qualify_domain_sender);
4495 DEBUG(D_receive) debug_printf("sender address = %s\n", sender_address);
4497 /* Handle a request to verify a list of addresses, or test them for delivery.
4498 This must follow the setting of the sender address, since routers can be
4499 predicated upon the sender. If no arguments are given, read addresses from
4500 stdin. Set debug_level to at least D_v to get full output for address testing.
4503 if (verify_address_mode || address_test_mode)
4506 int flags = vopt_qualify;
4508 if (verify_address_mode)
4510 if (!verify_as_sender) flags |= vopt_is_recipient;
4511 DEBUG(D_verify) debug_print_ids(US"Verifying:");
4516 flags |= vopt_is_recipient;
4517 debug_selector |= D_v;
4518 debug_file = stderr;
4519 debug_fd = fileno(debug_file);
4520 DEBUG(D_verify) debug_print_ids(US"Address testing:");
4523 if (recipients_arg < argc)
4525 while (recipients_arg < argc)
4527 uschar *s = argv[recipients_arg++];
4530 BOOL finished = FALSE;
4531 uschar *ss = parse_find_address_end(s, FALSE);
4532 if (*ss == ',') *ss = 0; else finished = TRUE;
4533 test_address(s, flags, &exit_value);
4536 while (*(++s) != 0 && (*s == ',' || isspace(*s)));
4543 uschar *s = get_stdinput(NULL, NULL);
4544 if (s == NULL) break;
4545 test_address(s, flags, &exit_value);
4549 exim_exit(exit_value);
4552 /* Handle expansion checking. Either expand items on the command line, or read
4553 from stdin if there aren't any. If -Mset was specified, load the message so
4554 that its variables can be used, but restrict this facility to admin users.
4555 Otherwise, if -bem was used, read a message from stdin. */
4559 if (msg_action_arg > 0 && msg_action == MSG_LOAD)
4561 uschar spoolname[256]; /* Not big_buffer; used in spool_read_header() */
4564 fprintf(stderr, "exim: permission denied\n");
4567 message_id = argv[msg_action_arg];
4568 (void)string_format(spoolname, sizeof(spoolname), "%s-H", message_id);
4569 if (!spool_open_datafile(message_id))
4570 printf ("Failed to load message datafile %s\n", message_id);
4571 if (spool_read_header(spoolname, TRUE, FALSE) != spool_read_OK)
4572 printf ("Failed to load message %s\n", message_id);
4575 /* Read a test message from a file. We fudge it up to be on stdin, saving
4576 stdin itself for later reading of expansion strings. */
4578 else if (expansion_test_message != NULL)
4580 int save_stdin = dup(0);
4581 int fd = Uopen(expansion_test_message, O_RDONLY, 0);
4584 fprintf(stderr, "exim: failed to open %s: %s\n", expansion_test_message,
4586 return EXIT_FAILURE;
4589 filter_test = FTEST_USER; /* Fudge to make it look like filter test */
4590 message_ended = END_NOTENDED;
4591 read_message_body(receive_msg(extract_recipients));
4592 message_linecount += body_linecount;
4593 (void)dup2(save_stdin, 0);
4594 (void)close(save_stdin);
4595 clearerr(stdin); /* Required by Darwin */
4598 /* Allow $recipients for this testing */
4600 enable_dollar_recipients = TRUE;
4602 /* Expand command line items */
4604 if (recipients_arg < argc)
4606 while (recipients_arg < argc)
4608 uschar *s = argv[recipients_arg++];
4609 uschar *ss = expand_string(s);
4610 if (ss == NULL) printf ("Failed: %s\n", expand_string_message);
4611 else printf("%s\n", CS ss);
4619 char *(*fn_readline)(const char *) = NULL;
4620 void (*fn_addhist)(const char *) = NULL;
4623 void *dlhandle = set_readline(&fn_readline, &fn_addhist);
4629 uschar *source = get_stdinput(fn_readline, fn_addhist);
4630 if (source == NULL) break;
4631 ss = expand_string(source);
4633 printf ("Failed: %s\n", expand_string_message);
4634 else printf("%s\n", CS ss);
4638 if (dlhandle != NULL) dlclose(dlhandle);
4642 /* The data file will be open after -Mset */
4644 if (deliver_datafile >= 0)
4646 (void)close(deliver_datafile);
4647 deliver_datafile = -1;
4650 exim_exit(EXIT_SUCCESS);
4654 /* The active host name is normally the primary host name, but it can be varied
4655 for hosts that want to play several parts at once. We need to ensure that it is
4656 set for host checking, and for receiving messages. */
4658 smtp_active_hostname = primary_hostname;
4659 if (raw_active_hostname != NULL)
4661 uschar *nah = expand_string(raw_active_hostname);
4664 if (!expand_string_forcedfail)
4665 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to expand \"%s\" "
4666 "(smtp_active_hostname): %s", raw_active_hostname,
4667 expand_string_message);
4669 else if (nah[0] != 0) smtp_active_hostname = nah;
4672 /* Handle host checking: this facility mocks up an incoming SMTP call from a
4673 given IP address so that the blocking and relay configuration can be tested.
4674 Unless a sender_ident was set by -oMt, we discard it (the default is the
4675 caller's login name). An RFC 1413 call is made only if we are running in the
4676 test harness and an incoming interface and both ports are specified, because
4677 there is no TCP/IP call to find the ident for. */
4684 if (!sender_ident_set)
4686 sender_ident = NULL;
4687 if (running_in_test_harness && sender_host_port != 0 &&
4688 interface_address != NULL && interface_port != 0)
4689 verify_get_ident(1413);
4692 /* In case the given address is a non-canonical IPv6 address, canonicize
4693 it. The code works for both IPv4 and IPv6, as it happens. */
4695 size = host_aton(sender_host_address, x);
4696 sender_host_address = store_get(48); /* large enough for full IPv6 */
4697 (void)host_nmtoa(size, x, -1, sender_host_address, ':');
4699 /* Now set up for testing */
4701 host_build_sender_fullhost();
4705 sender_local = FALSE;
4706 sender_host_notsocket = TRUE;
4707 debug_file = stderr;
4708 debug_fd = fileno(debug_file);
4709 fprintf(stdout, "\n**** SMTP testing session as if from host %s\n"
4710 "**** but without any ident (RFC 1413) callback.\n"
4711 "**** This is not for real!\n\n",
4712 sender_host_address);
4714 if (verify_check_host(&hosts_connection_nolog) == OK)
4715 log_write_selector &= ~L_smtp_connection;
4716 log_write(L_smtp_connection, LOG_MAIN, "%s", smtp_get_connection_info());
4718 /* NOTE: We do *not* call smtp_log_no_mail() if smtp_start_session() fails,
4719 because a log line has already been written for all its failure exists
4720 (usually "connection refused: <reason>") and writing another one is
4721 unnecessary clutter. */
4723 if (smtp_start_session())
4725 reset_point = store_get(0);
4728 store_reset(reset_point);
4729 if (smtp_setup_msg() <= 0) break;
4730 if (!receive_msg(FALSE)) break;
4734 exim_exit(EXIT_SUCCESS);
4738 /* Arrange for message reception if recipients or SMTP were specified;
4739 otherwise complain unless a version print (-bV) happened or this is a filter
4740 verification test. In the former case, show the configuration file name. */
4742 if (recipients_arg >= argc && !extract_recipients && !smtp_input)
4744 if (version_printed)
4746 printf("Configuration file is %s\n", config_main_filename);
4747 return EXIT_SUCCESS;
4750 if (filter_test == FTEST_NONE)
4751 exim_usage(called_as);
4755 /* If mua_wrapper is set, Exim is being used to turn an MUA that submits on the
4756 standard input into an MUA that submits to a smarthost over TCP/IP. We know
4757 that we are not called from inetd, because that is rejected above. The
4758 following configuration settings are forced here:
4760 (1) Synchronous delivery (-odi)
4761 (2) Errors to stderr (-oep == -oeq)
4762 (3) No parallel remote delivery
4763 (4) Unprivileged delivery
4765 We don't force overall queueing options because there are several of them;
4766 instead, queueing is avoided below when mua_wrapper is set. However, we do need
4767 to override any SMTP queueing. */
4771 synchronous_delivery = TRUE;
4772 arg_error_handling = ERRORS_STDERR;
4773 remote_max_parallel = 1;
4774 deliver_drop_privilege = TRUE;
4776 queue_smtp_domains = NULL;
4780 /* Prepare to accept one or more new messages on the standard input. When a
4781 message has been read, its id is returned in message_id[]. If doing immediate
4782 delivery, we fork a delivery process for each received message, except for the
4783 last one, where we can save a process switch.
4785 It is only in non-smtp mode that error_handling is allowed to be changed from
4786 its default of ERRORS_SENDER by argument. (Idle thought: are any of the
4787 sendmail error modes other than -oem ever actually used? Later: yes.) */
4789 if (!smtp_input) error_handling = arg_error_handling;
4791 /* If this is an inetd call, ensure that stderr is closed to prevent panic
4792 logging being sent down the socket and make an identd call to get the
4797 (void)fclose(stderr);
4798 exim_nullstd(); /* Re-open to /dev/null */
4799 verify_get_ident(IDENT_PORT);
4800 host_build_sender_fullhost();
4801 set_process_info("handling incoming connection from %s via inetd",
4805 /* If the sender host address has been set, build sender_fullhost if it hasn't
4806 already been done (which it will have been for inetd). This caters for the
4807 case when it is forced by -oMa. However, we must flag that it isn't a socket,
4808 so that the test for IP options is skipped for -bs input. */
4810 if (sender_host_address != NULL && sender_fullhost == NULL)
4812 host_build_sender_fullhost();
4813 set_process_info("handling incoming connection from %s via -oMa",
4815 sender_host_notsocket = TRUE;
4818 /* Otherwise, set the sender host as unknown except for inetd calls. This
4819 prevents host checking in the case of -bs not from inetd and also for -bS. */
4821 else if (!is_inetd) sender_host_unknown = TRUE;
4823 /* If stdout does not exist, then dup stdin to stdout. This can happen
4824 if exim is started from inetd. In this case fd 0 will be set to the socket,
4825 but fd 1 will not be set. This also happens for passed SMTP channels. */
4827 if (fstat(1, &statbuf) < 0) (void)dup2(0, 1);
4829 /* Set up the incoming protocol name and the state of the program. Root is
4830 allowed to force received protocol via the -oMr option above. If we have come
4831 via inetd, the process info has already been set up. We don't set
4832 received_protocol here for smtp input, as it varies according to
4833 batch/HELO/EHLO/AUTH/TLS. */
4837 if (!is_inetd) set_process_info("accepting a local %sSMTP message from <%s>",
4838 smtp_batched_input? "batched " : "",
4839 (sender_address!= NULL)? sender_address : originator_login);
4843 if (received_protocol == NULL)
4844 received_protocol = string_sprintf("local%s", called_as);
4845 set_process_info("accepting a local non-SMTP message from <%s>",
4849 /* Initialize the session_local_queue-only flag (this will be ignored if
4850 mua_wrapper is set) */
4853 session_local_queue_only = queue_only;
4855 /* For non-SMTP and for batched SMTP input, check that there is enough space on
4856 the spool if so configured. On failure, we must not attempt to send an error
4857 message! (For interactive SMTP, the check happens at MAIL FROM and an SMTP
4858 error code is given.) */
4860 if ((!smtp_input || smtp_batched_input) && !receive_check_fs(0))
4862 fprintf(stderr, "exim: insufficient disk space\n");
4863 return EXIT_FAILURE;
4866 /* If this is smtp input of any kind, real or batched, handle the start of the
4869 NOTE: We do *not* call smtp_log_no_mail() if smtp_start_session() fails,
4870 because a log line has already been written for all its failure exists
4871 (usually "connection refused: <reason>") and writing another one is
4872 unnecessary clutter. */
4878 if (verify_check_host(&hosts_connection_nolog) == OK)
4879 log_write_selector &= ~L_smtp_connection;
4880 log_write(L_smtp_connection, LOG_MAIN, "%s", smtp_get_connection_info());
4881 if (!smtp_start_session())
4884 exim_exit(EXIT_SUCCESS);
4888 /* Otherwise, set up the input size limit here. */
4892 thismessage_size_limit = expand_string_integer(message_size_limit, TRUE);
4893 if (expand_string_message != NULL)
4895 if (thismessage_size_limit == -1)
4896 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to expand "
4897 "message_size_limit: %s", expand_string_message);
4899 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "invalid value for "
4900 "message_size_limit: %s", expand_string_message);
4904 /* Loop for several messages when reading SMTP input. If we fork any child
4905 processes, we don't want to wait for them unless synchronous delivery is
4906 requested, so set SIGCHLD to SIG_IGN in that case. This is not necessarily the
4907 same as SIG_DFL, despite the fact that documentation often lists the default as
4908 "ignore". This is a confusing area. This is what I know:
4910 At least on some systems (e.g. Solaris), just setting SIG_IGN causes child
4911 processes that complete simply to go away without ever becoming defunct. You
4912 can't then wait for them - but we don't want to wait for them in the
4913 non-synchronous delivery case. However, this behaviour of SIG_IGN doesn't
4914 happen for all OS (e.g. *BSD is different).
4916 But that's not the end of the story. Some (many? all?) systems have the
4917 SA_NOCLDWAIT option for sigaction(). This requests the behaviour that Solaris
4918 has by default, so it seems that the difference is merely one of default
4919 (compare restarting vs non-restarting signals).
4921 To cover all cases, Exim sets SIG_IGN with SA_NOCLDWAIT here if it can. If not,
4922 it just sets SIG_IGN. To be on the safe side it also calls waitpid() at the end
4923 of the loop below. Paranoia rules.
4925 February 2003: That's *still* not the end of the story. There are now versions
4926 of Linux (where SIG_IGN does work) that are picky. If, having set SIG_IGN, a
4927 process then calls waitpid(), a grumble is written to the system log, because
4928 this is logically inconsistent. In other words, it doesn't like the paranoia.
4929 As a consequenc of this, the waitpid() below is now excluded if we are sure
4930 that SIG_IGN works. */
4932 if (!synchronous_delivery)
4935 struct sigaction act;
4936 act.sa_handler = SIG_IGN;
4937 sigemptyset(&(act.sa_mask));
4938 act.sa_flags = SA_NOCLDWAIT;
4939 sigaction(SIGCHLD, &act, NULL);
4941 signal(SIGCHLD, SIG_IGN);
4945 /* Save the current store pool point, for resetting at the start of
4946 each message, and save the real sender address, if any. */
4948 reset_point = store_get(0);
4949 real_sender_address = sender_address;
4951 /* Loop to receive messages; receive_msg() returns TRUE if there are more
4952 messages to be read (SMTP input), or FALSE otherwise (not SMTP, or SMTP channel
4957 store_reset(reset_point);
4960 /* Handle the SMTP case; call smtp_setup_mst() to deal with the initial SMTP
4961 input and build the recipients list, before calling receive_msg() to read the
4962 message proper. Whatever sender address is given in the SMTP transaction is
4963 often ignored for local senders - we use the actual sender, which is normally
4964 either the underlying user running this process or a -f argument provided by
4965 a trusted caller. It is saved in real_sender_address. The test for whether to
4966 accept the SMTP sender is encapsulated in receive_check_set_sender(). */
4971 if ((rc = smtp_setup_msg()) > 0)
4973 if (real_sender_address != NULL &&
4974 !receive_check_set_sender(sender_address))
4976 sender_address = raw_sender = real_sender_address;
4977 sender_address_unrewritten = NULL;
4980 /* For batched SMTP, we have to run the acl_not_smtp_start ACL, since it
4981 isn't really SMTP, so no other ACL will run until the acl_not_smtp one at
4982 the very end. The result of the ACL is ignored (as for other non-SMTP
4983 messages). It is run for its potential side effects. */
4985 if (smtp_batched_input && acl_not_smtp_start != NULL)
4987 uschar *user_msg, *log_msg;
4988 enable_dollar_recipients = TRUE;
4989 (void)acl_check(ACL_WHERE_NOTSMTP_START, NULL, acl_not_smtp_start,
4990 &user_msg, &log_msg);
4991 enable_dollar_recipients = FALSE;
4994 /* Now get the data for the message */
4996 more = receive_msg(extract_recipients);
4997 if (message_id[0] == 0)
5000 smtp_log_no_mail(); /* Log no mail if configured */
5001 exim_exit(EXIT_FAILURE);
5006 smtp_log_no_mail(); /* Log no mail if configured */
5007 exim_exit((rc == 0)? EXIT_SUCCESS : EXIT_FAILURE);
5011 /* In the non-SMTP case, we have all the information from the command
5012 line, but must process it in case it is in the more general RFC822
5013 format, and in any case, to detect syntax errors. Also, it appears that
5014 the use of comma-separated lists as single arguments is common, so we
5015 had better support them. */
5021 int count = argc - recipients_arg;
5022 uschar **list = argv + recipients_arg;
5024 /* These options cannot be changed dynamically for non-SMTP messages */
5026 active_local_sender_retain = local_sender_retain;
5027 active_local_from_check = local_from_check;
5029 /* Save before any rewriting */
5031 raw_sender = string_copy(sender_address);
5033 /* Loop for each argument */
5035 for (i = 0; i < count; i++)
5037 int start, end, domain;
5039 uschar *s = list[i];
5041 /* Loop for each comma-separated address */
5045 BOOL finished = FALSE;
5047 uschar *ss = parse_find_address_end(s, FALSE);
5049 if (*ss == ',') *ss = 0; else finished = TRUE;
5051 /* Check max recipients - if -t was used, these aren't recipients */
5053 if (recipients_max > 0 && ++rcount > recipients_max &&
5054 !extract_recipients)
5056 if (error_handling == ERRORS_STDERR)
5058 fprintf(stderr, "exim: too many recipients\n");
5059 exim_exit(EXIT_FAILURE);
5064 moan_to_sender(ERRMESS_TOOMANYRECIP, NULL, NULL, stdin, TRUE)?
5065 errors_sender_rc : EXIT_FAILURE;
5070 parse_extract_address(s, &errmess, &start, &end, &domain, FALSE);
5072 if (domain == 0 && !allow_unqualified_recipient)
5075 errmess = US"unqualified recipient address not allowed";
5078 if (recipient == NULL)
5080 if (error_handling == ERRORS_STDERR)
5082 fprintf(stderr, "exim: bad recipient address \"%s\": %s\n",
5083 string_printing(list[i]), errmess);
5084 exim_exit(EXIT_FAILURE);
5090 eblock.text1 = string_printing(list[i]);
5091 eblock.text2 = errmess;
5093 moan_to_sender(ERRMESS_BADARGADDRESS, &eblock, NULL, stdin, TRUE)?
5094 errors_sender_rc : EXIT_FAILURE;
5098 receive_add_recipient(recipient, -1);
5101 while (*(++s) != 0 && (*s == ',' || isspace(*s)));
5105 /* Show the recipients when debugging */
5110 if (sender_address != NULL) debug_printf("Sender: %s\n", sender_address);
5111 if (recipients_list != NULL)
5113 debug_printf("Recipients:\n");
5114 for (i = 0; i < recipients_count; i++)
5115 debug_printf(" %s\n", recipients_list[i].address);
5119 /* Run the acl_not_smtp_start ACL if required. The result of the ACL is
5120 ignored; rejecting here would just add complication, and it can just as
5121 well be done later. Allow $recipients to be visible in the ACL. */
5123 if (acl_not_smtp_start != NULL)
5125 uschar *user_msg, *log_msg;
5126 enable_dollar_recipients = TRUE;
5127 (void)acl_check(ACL_WHERE_NOTSMTP_START, NULL, acl_not_smtp_start,
5128 &user_msg, &log_msg);
5129 enable_dollar_recipients = FALSE;
5132 /* Read the data for the message. If filter_test is not FTEST_NONE, this
5133 will just read the headers for the message, and not write anything onto the
5136 message_ended = END_NOTENDED;
5137 more = receive_msg(extract_recipients);
5139 /* more is always FALSE here (not SMTP message) when reading a message
5140 for real; when reading the headers of a message for filter testing,
5141 it is TRUE if the headers were terminated by '.' and FALSE otherwise. */
5143 if (message_id[0] == 0) exim_exit(EXIT_FAILURE);
5144 } /* Non-SMTP message reception */
5146 /* If this is a filter testing run, there are headers in store, but
5147 no message on the spool. Run the filtering code in testing mode, setting
5148 the domain to the qualify domain and the local part to the current user,
5149 unless they have been set by options. The prefix and suffix are left unset
5150 unless specified. The the return path is set to to the sender unless it has
5151 already been set from a return-path header in the message. */
5153 if (filter_test != FTEST_NONE)
5155 deliver_domain = (ftest_domain != NULL)?
5156 ftest_domain : qualify_domain_recipient;
5157 deliver_domain_orig = deliver_domain;
5158 deliver_localpart = (ftest_localpart != NULL)?
5159 ftest_localpart : originator_login;
5160 deliver_localpart_orig = deliver_localpart;
5161 deliver_localpart_prefix = ftest_prefix;
5162 deliver_localpart_suffix = ftest_suffix;
5163 deliver_home = originator_home;
5165 if (return_path == NULL)
5167 printf("Return-path copied from sender\n");
5168 return_path = string_copy(sender_address);
5172 printf("Return-path = %s\n", (return_path[0] == 0)? US"<>" : return_path);
5174 printf("Sender = %s\n", (sender_address[0] == 0)? US"<>" : sender_address);
5176 receive_add_recipient(
5177 string_sprintf("%s%s%s@%s",
5178 (ftest_prefix == NULL)? US"" : ftest_prefix,
5180 (ftest_suffix == NULL)? US"" : ftest_suffix,
5181 deliver_domain), -1);
5183 printf("Recipient = %s\n", recipients_list[0].address);
5184 if (ftest_prefix != NULL) printf("Prefix = %s\n", ftest_prefix);
5185 if (ftest_suffix != NULL) printf("Suffix = %s\n", ftest_suffix);
5187 (void)chdir("/"); /* Get away from wherever the user is running this from */
5189 /* Now we run either a system filter test, or a user filter test, or both.
5190 In the latter case, headers added by the system filter will persist and be
5191 available to the user filter. We need to copy the filter variables
5194 if ((filter_test & FTEST_SYSTEM) != 0)
5196 if (!filter_runtest(filter_sfd, filter_test_sfile, TRUE, more))
5197 exim_exit(EXIT_FAILURE);
5200 memcpy(filter_sn, filter_n, sizeof(filter_sn));
5202 if ((filter_test & FTEST_USER) != 0)
5204 if (!filter_runtest(filter_ufd, filter_test_ufile, FALSE, more))
5205 exim_exit(EXIT_FAILURE);
5208 exim_exit(EXIT_SUCCESS);
5211 /* Else act on the result of message reception. We should not get here unless
5212 message_id[0] is non-zero. If queue_only is set, session_local_queue_only
5213 will be TRUE. If it is not, check on the number of messages received in this
5216 if (!session_local_queue_only &&
5217 smtp_accept_queue_per_connection > 0 &&
5218 receive_messagecount > smtp_accept_queue_per_connection)
5220 session_local_queue_only = TRUE;
5221 queue_only_reason = 2;
5224 /* Initialize local_queue_only from session_local_queue_only. If it is false,
5225 and queue_only_load is set, check that the load average is below it. If it is
5226 not, set local_queue_only TRUE. If queue_only_load_latch is true (the
5227 default), we put the whole session into queue_only mode. It then remains this
5228 way for any subsequent messages on the same SMTP connection. This is a
5229 deliberate choice; even though the load average may fall, it doesn't seem
5230 right to deliver later messages on the same call when not delivering earlier
5231 ones. However, there are odd cases where this is not wanted, so this can be
5232 changed by setting queue_only_load_latch false. */
5234 local_queue_only = session_local_queue_only;
5235 if (!local_queue_only && queue_only_load >= 0)
5237 local_queue_only = (load_average = OS_GETLOADAVG()) > queue_only_load;
5238 if (local_queue_only)
5240 queue_only_reason = 3;
5241 if (queue_only_load_latch) session_local_queue_only = TRUE;
5245 /* If running as an MUA wrapper, all queueing options and freezing options
5249 local_queue_only = queue_only_policy = deliver_freeze = FALSE;
5251 /* Log the queueing here, when it will get a message id attached, but
5252 not if queue_only is set (case 0). Case 1 doesn't happen here (too many
5255 if (local_queue_only) switch(queue_only_reason)
5258 log_write(L_delay_delivery,
5259 LOG_MAIN, "no immediate delivery: more than %d messages "
5260 "received in one connection", smtp_accept_queue_per_connection);
5264 log_write(L_delay_delivery,
5265 LOG_MAIN, "no immediate delivery: load average %.2f",
5266 (double)load_average/1000.0);
5270 /* Else do the delivery unless the ACL or local_scan() called for queue only
5271 or froze the message. Always deliver in a separate process. A fork failure is
5272 not a disaster, as the delivery will eventually happen on a subsequent queue
5273 run. The search cache must be tidied before the fork, as the parent will
5274 do it before exiting. The child will trigger a lookup failure and
5275 thereby defer the delivery if it tries to use (for example) a cached ldap
5276 connection that the parent has called unbind on. */
5278 else if (!queue_only_policy && !deliver_freeze)
5283 if ((pid = fork()) == 0)
5286 close_unwanted(); /* Close unwanted file descriptors and TLS */
5287 exim_nullstd(); /* Ensure std{in,out,err} exist */
5289 /* Re-exec Exim if we need to regain privilege (note: in mua_wrapper
5290 mode, deliver_drop_privilege is forced TRUE). */
5292 if (geteuid() != root_uid && !deliver_drop_privilege && !unprivileged)
5294 (void)child_exec_exim(CEE_EXEC_EXIT, FALSE, NULL, FALSE, 2, US"-Mc",
5296 /* Control does not return here. */
5299 /* No need to re-exec */
5301 rc = deliver_message(message_id, FALSE, FALSE);
5303 _exit((!mua_wrapper || rc == DELIVER_MUA_SUCCEEDED)?
5304 EXIT_SUCCESS : EXIT_FAILURE);
5309 log_write(0, LOG_MAIN|LOG_PANIC, "failed to fork automatic delivery "
5310 "process: %s", strerror(errno));
5313 /* In the parent, wait if synchronous delivery is required. This will
5314 always be the case in MUA wrapper mode. */
5316 else if (synchronous_delivery)
5319 while (wait(&status) != pid);
5320 if ((status & 0x00ff) != 0)
5321 log_write(0, LOG_MAIN|LOG_PANIC,
5322 "process %d crashed with signal %d while delivering %s",
5323 (int)pid, status & 0x00ff, message_id);
5324 if (mua_wrapper && (status & 0xffff) != 0) exim_exit(EXIT_FAILURE);
5328 /* The loop will repeat if more is TRUE. If we do not know know that the OS
5329 automatically reaps children (see comments above the loop), clear away any
5330 finished subprocesses here, in case there are lots of messages coming in
5331 from the same source. */
5333 #ifndef SIG_IGN_WORKS
5334 while (waitpid(-1, NULL, WNOHANG) > 0);
5338 exim_exit(EXIT_SUCCESS); /* Never returns */
5339 return 0; /* To stop compiler warning */