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)
728 #ifdef DB_VERSION_STRING
729 fprintf(f, "Berkeley DB: %s\n", DB_VERSION_STRING);
730 #elif defined(BTREEVERSION) && defined(HASHVERSION)
732 fprintf(f, "Probably Berkeley DB version 1.8x (native mode)\n");
734 fprintf(f, "Probably Berkeley DB version 1.8x (compatibility mode)\n");
736 #elif defined(_DBM_RDONLY) || defined(dbm_dirfno)
737 fprintf(f, "Probably ndbm\n");
738 #elif defined(USE_TDB)
739 fprintf(f, "Using tdb\n");
742 fprintf(f, "Probably GDBM (native mode)\n");
744 fprintf(f, "Probably GDBM (compatibility mode)\n");
748 fprintf(f, "Support for:");
749 #ifdef SUPPORT_CRYPTEQ
750 fprintf(f, " crypteq");
753 fprintf(f, " iconv()");
758 #ifdef HAVE_SETCLASSRESOURCES
759 fprintf(f, " use_setclassresources");
768 fprintf(f, " Expand_dlfunc");
770 #ifdef USE_TCP_WRAPPERS
771 fprintf(f, " TCPwrappers");
775 fprintf(f, " GnuTLS");
777 fprintf(f, " OpenSSL");
780 #ifdef SUPPORT_TRANSLATE_IP_ADDRESS
781 fprintf(f, " translate_ip_address");
783 #ifdef SUPPORT_MOVE_FROZEN_MESSAGES
784 fprintf(f, " move_frozen_messages");
786 #ifdef WITH_CONTENT_SCAN
787 fprintf(f, " Content_Scanning");
792 #ifdef WITH_OLD_DEMIME
793 fprintf(f, " Old_Demime");
795 #ifdef EXPERIMENTAL_SPF
796 fprintf(f, " Experimental_SPF");
798 #ifdef EXPERIMENTAL_SRS
799 fprintf(f, " Experimental_SRS");
801 #ifdef EXPERIMENTAL_BRIGHTMAIL
802 fprintf(f, " Experimental_Brightmail");
804 #ifdef EXPERIMENTAL_DCC
805 fprintf(f, " Experimental_DCC");
809 fprintf(f, "Lookups (built-in):");
810 #if defined(LOOKUP_LSEARCH) && LOOKUP_LSEARCH!=2
811 fprintf(f, " lsearch wildlsearch nwildlsearch iplsearch");
813 #if defined(LOOKUP_CDB) && LOOKUP_CDB!=2
816 #if defined(LOOKUP_DBM) && LOOKUP_DBM!=2
817 fprintf(f, " dbm dbmnz");
819 #if defined(LOOKUP_DNSDB) && LOOKUP_DNSDB!=2
820 fprintf(f, " dnsdb");
822 #if defined(LOOKUP_DSEARCH) && LOOKUP_DSEARCH!=2
823 fprintf(f, " dsearch");
825 #if defined(LOOKUP_IBASE) && LOOKUP_IBASE!=2
826 fprintf(f, " ibase");
828 #if defined(LOOKUP_LDAP) && LOOKUP_LDAP!=2
829 fprintf(f, " ldap ldapdn ldapm");
831 #if defined(LOOKUP_MYSQL) && LOOKUP_MYSQL!=2
832 fprintf(f, " mysql");
834 #if defined(LOOKUP_NIS) && LOOKUP_NIS!=2
835 fprintf(f, " nis nis0");
837 #if defined(LOOKUP_NISPLUS) && LOOKUP_NISPLUS!=2
838 fprintf(f, " nisplus");
840 #if defined(LOOKUP_ORACLE) && LOOKUP_ORACLE!=2
841 fprintf(f, " oracle");
843 #if defined(LOOKUP_PASSWD) && LOOKUP_PASSWD!=2
844 fprintf(f, " passwd");
846 #if defined(LOOKUP_PGSQL) && LOOKUP_PGSQL!=2
847 fprintf(f, " pgsql");
849 #if defined(LOOKUP_SQLITE) && LOOKUP_SQLITE!=2
850 fprintf(f, " sqlite");
852 #if defined(LOOKUP_TESTDB) && LOOKUP_TESTDB!=2
853 fprintf(f, " testdb");
855 #if defined(LOOKUP_WHOSON) && LOOKUP_WHOSON!=2
856 fprintf(f, " whoson");
860 fprintf(f, "Authenticators:");
862 fprintf(f, " cram_md5");
864 #ifdef AUTH_CYRUS_SASL
865 fprintf(f, " cyrus_sasl");
868 fprintf(f, " dovecot");
870 #ifdef AUTH_PLAINTEXT
871 fprintf(f, " plaintext");
878 fprintf(f, "Routers:");
880 fprintf(f, " accept");
882 #ifdef ROUTER_DNSLOOKUP
883 fprintf(f, " dnslookup");
885 #ifdef ROUTER_IPLITERAL
886 fprintf(f, " ipliteral");
888 #ifdef ROUTER_IPLOOKUP
889 fprintf(f, " iplookup");
891 #ifdef ROUTER_MANUALROUTE
892 fprintf(f, " manualroute");
894 #ifdef ROUTER_QUERYPROGRAM
895 fprintf(f, " queryprogram");
897 #ifdef ROUTER_REDIRECT
898 fprintf(f, " redirect");
902 fprintf(f, "Transports:");
903 #ifdef TRANSPORT_APPENDFILE
904 fprintf(f, " appendfile");
905 #ifdef SUPPORT_MAILDIR
906 fprintf(f, "/maildir");
908 #ifdef SUPPORT_MAILSTORE
909 fprintf(f, "/mailstore");
915 #ifdef TRANSPORT_AUTOREPLY
916 fprintf(f, " autoreply");
918 #ifdef TRANSPORT_LMTP
921 #ifdef TRANSPORT_PIPE
924 #ifdef TRANSPORT_SMTP
929 if (fixed_never_users[0] > 0)
932 fprintf(f, "Fixed never_users: ");
933 for (i = 1; i <= (int)fixed_never_users[0] - 1; i++)
934 fprintf(f, "%d:", (unsigned int)fixed_never_users[i]);
935 fprintf(f, "%d\n", (unsigned int)fixed_never_users[i]);
938 fprintf(f, "Size of off_t: " SIZE_T_FMT "\n", sizeof(off_t));
940 /* Everything else is details which are only worth reporting when debugging.
941 Perhaps the tls_version_report should move into this too. */
946 /* clang defines __GNUC__ (at least, for me) so test for it first */
947 #if defined(__clang__)
948 fprintf(f, "Compiler: CLang [%s]\n", __clang_version__);
949 #elif defined(__GNUC__)
950 fprintf(f, "Compiler: GCC [%s]\n",
954 "? unknown version ?"
958 fprintf(f, "Compiler: <unknown>\n");
962 tls_version_report(f);
965 #ifdef AUTH_CYRUS_SASL
966 auth_cyrus_sasl_version_report(f);
969 fprintf(f, "Library version: PCRE: Compile: %d.%d%s\n"
971 PCRE_MAJOR, PCRE_MINOR,
972 /* PRE_PRERELEASE is either defined and empty or a string.
973 * unless its an ancient version of PCRE in which case it
975 #ifdef PCRE_PRERELEASE
983 for (i = 0; i < lookup_list_count; i++)
985 if (lookup_list[i]->version_report)
986 lookup_list[i]->version_report(f);
989 #ifdef WHITELIST_D_MACROS
990 fprintf(f, "WHITELIST_D_MACROS: \"%s\"\n", WHITELIST_D_MACROS);
992 fprintf(f, "WHITELIST_D_MACROS unset\n");
994 #ifdef TRUSTED_CONFIG_LIST
995 fprintf(f, "TRUSTED_CONFIG_LIST: \"%s\"\n", TRUSTED_CONFIG_LIST);
997 fprintf(f, "TRUSTED_CONFIG_LIST unset\n");
1006 /*************************************************
1007 * Quote a local part *
1008 *************************************************/
1010 /* This function is used when a sender address or a From: or Sender: header
1011 line is being created from the caller's login, or from an authenticated_id. It
1012 applies appropriate quoting rules for a local part.
1014 Argument: the local part
1015 Returns: the local part, quoted if necessary
1019 local_part_quote(uschar *lpart)
1021 BOOL needs_quote = FALSE;
1026 for (t = lpart; !needs_quote && *t != 0; t++)
1028 needs_quote = !isalnum(*t) && strchr("!#$%&'*+-/=?^_`{|}~", *t) == NULL &&
1029 (*t != '.' || t == lpart || t[1] == 0);
1032 if (!needs_quote) return lpart;
1035 yield = string_cat(NULL, &size, &ptr, US"\"", 1);
1039 uschar *nq = US Ustrpbrk(lpart, "\\\"");
1042 yield = string_cat(yield, &size, &ptr, lpart, Ustrlen(lpart));
1045 yield = string_cat(yield, &size, &ptr, lpart, nq - lpart);
1046 yield = string_cat(yield, &size, &ptr, US"\\", 1);
1047 yield = string_cat(yield, &size, &ptr, nq, 1);
1051 yield = string_cat(yield, &size, &ptr, US"\"", 1);
1059 /*************************************************
1060 * Load readline() functions *
1061 *************************************************/
1063 /* This function is called from testing executions that read data from stdin,
1064 but only when running as the calling user. Currently, only -be does this. The
1065 function loads the readline() function library and passes back the functions.
1066 On some systems, it needs the curses library, so load that too, but try without
1067 it if loading fails. All this functionality has to be requested at build time.
1070 fn_readline_ptr pointer to where to put the readline pointer
1071 fn_addhist_ptr pointer to where to put the addhistory function
1073 Returns: the dlopen handle or NULL on failure
1077 set_readline(char * (**fn_readline_ptr)(const char *),
1078 void (**fn_addhist_ptr)(const char *))
1081 void *dlhandle_curses = dlopen("libcurses." DYNLIB_FN_EXT, RTLD_GLOBAL|RTLD_LAZY);
1083 dlhandle = dlopen("libreadline." DYNLIB_FN_EXT, RTLD_GLOBAL|RTLD_NOW);
1084 if (dlhandle_curses != NULL) dlclose(dlhandle_curses);
1086 if (dlhandle != NULL)
1088 /* Checked manual pages; at least in GNU Readline 6.1, the prototypes are:
1089 * char * readline (const char *prompt);
1090 * void add_history (const char *string);
1092 *fn_readline_ptr = (char *(*)(const char*))dlsym(dlhandle, "readline");
1093 *fn_addhist_ptr = (void(*)(const char*))dlsym(dlhandle, "add_history");
1097 DEBUG(D_any) debug_printf("failed to load readline: %s\n", dlerror());
1106 /*************************************************
1107 * Get a line from stdin for testing things *
1108 *************************************************/
1110 /* This function is called when running tests that can take a number of lines
1111 of input (for example, -be and -bt). It handles continuations and trailing
1112 spaces. And prompting and a blank line output on eof. If readline() is in use,
1113 the arguments are non-NULL and provide the relevant functions.
1116 fn_readline readline function or NULL
1117 fn_addhist addhist function or NULL
1119 Returns: pointer to dynamic memory, or NULL at end of file
1123 get_stdinput(char *(*fn_readline)(const char *), void(*fn_addhist)(const char *))
1128 uschar *yield = NULL;
1130 if (fn_readline == NULL) { printf("> "); fflush(stdout); }
1134 uschar buffer[1024];
1138 char *readline_line = NULL;
1139 if (fn_readline != NULL)
1141 if ((readline_line = fn_readline((i > 0)? "":"> ")) == NULL) break;
1142 if (*readline_line != 0 && fn_addhist != NULL) fn_addhist(readline_line);
1143 p = US readline_line;
1148 /* readline() not in use */
1151 if (Ufgets(buffer, sizeof(buffer), stdin) == NULL) break;
1155 /* Handle the line */
1157 ss = p + (int)Ustrlen(p);
1158 while (ss > p && isspace(ss[-1])) ss--;
1162 while (p < ss && isspace(*p)) p++; /* leading space after cont */
1165 yield = string_cat(yield, &size, &ptr, p, ss - p);
1168 if (fn_readline != NULL) free(readline_line);
1171 if (ss == p || yield[ptr-1] != '\\')
1179 if (yield == NULL) printf("\n");
1185 /*************************************************
1186 * Output usage information for the program *
1187 *************************************************/
1189 /* This function is called when there are no recipients
1190 or a specific --help argument was added.
1193 progname information on what name we were called by
1195 Returns: DOES NOT RETURN
1199 exim_usage(uschar *progname)
1202 /* Handle specific program invocation varients */
1203 if (Ustrcmp(progname, US"-mailq") == 0)
1206 "mailq - list the contents of the mail queue\n\n"
1207 "For a list of options, see the Exim documentation.\n");
1211 /* Generic usage - we output this whatever happens */
1213 "Exim is a Mail Transfer Agent. It is normally called by Mail User Agents,\n"
1214 "not directly from a shell command line. Options and/or arguments control\n"
1215 "what it does when called. For a list of options, see the Exim documentation.\n");
1222 /*************************************************
1223 * Validate that the macros given are okay *
1224 *************************************************/
1226 /* Typically, Exim will drop privileges if macros are supplied. In some
1227 cases, we want to not do so.
1229 Arguments: none (macros is a global)
1230 Returns: true if trusted, false otherwise
1234 macros_trusted(void)
1236 #ifdef WHITELIST_D_MACROS
1238 uschar *whitelisted, *end, *p, **whites, **w;
1239 int white_count, i, n;
1241 BOOL prev_char_item, found;
1246 #ifndef WHITELIST_D_MACROS
1250 /* We only trust -D overrides for some invoking users:
1251 root, the exim run-time user, the optional config owner user.
1252 I don't know why config-owner would be needed, but since they can own the
1253 config files anyway, there's no security risk to letting them override -D. */
1254 if ( ! ((real_uid == root_uid)
1255 || (real_uid == exim_uid)
1256 #ifdef CONFIGURE_OWNER
1257 || (real_uid == config_uid)
1261 debug_printf("macros_trusted rejecting macros for uid %d\n", (int) real_uid);
1265 /* Get a list of macros which are whitelisted */
1266 whitelisted = string_copy_malloc(US WHITELIST_D_MACROS);
1267 prev_char_item = FALSE;
1269 for (p = whitelisted; *p != '\0'; ++p)
1271 if (*p == ':' || isspace(*p))
1276 prev_char_item = FALSE;
1279 if (!prev_char_item)
1280 prev_char_item = TRUE;
1287 whites = store_malloc(sizeof(uschar *) * (white_count+1));
1288 for (p = whitelisted, i = 0; (p != end) && (i < white_count); ++p)
1293 if (i == white_count)
1295 while (*p != '\0' && p < end)
1301 /* The list of macros should be very short. Accept the N*M complexity. */
1302 for (m = macros; m != NULL; m = m->next)
1305 for (w = whites; *w; ++w)
1306 if (Ustrcmp(*w, m->name) == 0)
1313 if (m->replacement == NULL)
1315 len = Ustrlen(m->replacement);
1318 n = pcre_exec(regex_whitelisted_macro, NULL, CS m->replacement, len,
1319 0, PCRE_EOPT, NULL, 0);
1322 if (n != PCRE_ERROR_NOMATCH)
1323 debug_printf("macros_trusted checking %s returned %d\n", m->name, n);
1327 DEBUG(D_any) debug_printf("macros_trusted overridden to true by whitelisting\n");
1333 /*************************************************
1334 * Entry point and high-level code *
1335 *************************************************/
1337 /* Entry point for the Exim mailer. Analyse the arguments and arrange to take
1338 the appropriate action. All the necessary functions are present in the one
1339 binary. I originally thought one should split it up, but it turns out that so
1340 much of the apparatus is needed in each chunk that one might as well just have
1341 it all available all the time, which then makes the coding easier as well.
1344 argc count of entries in argv
1345 argv argument strings, with argv[0] being the program name
1347 Returns: EXIT_SUCCESS if terminated successfully
1348 EXIT_FAILURE otherwise, except when a message has been sent
1349 to the sender, and -oee was given
1353 main(int argc, char **cargv)
1355 uschar **argv = USS cargv;
1356 int arg_receive_timeout = -1;
1357 int arg_smtp_receive_timeout = -1;
1358 int arg_error_handling = error_handling;
1359 int filter_sfd = -1;
1360 int filter_ufd = -1;
1363 int list_queue_option = 0;
1365 int msg_action_arg = -1;
1366 int namelen = (argv[0] == NULL)? 0 : Ustrlen(argv[0]);
1367 int queue_only_reason = 0;
1369 int perl_start_option = 0;
1371 int recipients_arg = argc;
1372 int sender_address_domain = 0;
1373 int test_retry_arg = -1;
1374 int test_rewrite_arg = -1;
1375 BOOL arg_queue_only = FALSE;
1376 BOOL bi_option = FALSE;
1377 BOOL checking = FALSE;
1378 BOOL count_queue = FALSE;
1379 BOOL expansion_test = FALSE;
1380 BOOL extract_recipients = FALSE;
1381 BOOL forced_delivery = FALSE;
1382 BOOL f_end_dot = FALSE;
1383 BOOL deliver_give_up = FALSE;
1384 BOOL list_queue = FALSE;
1385 BOOL list_options = FALSE;
1386 BOOL local_queue_only;
1388 BOOL one_msg_action = FALSE;
1389 BOOL queue_only_set = FALSE;
1390 BOOL receiving_message = TRUE;
1391 BOOL sender_ident_set = FALSE;
1392 BOOL session_local_queue_only;
1394 BOOL removed_privilege = FALSE;
1395 BOOL usage_wanted = FALSE;
1396 BOOL verify_address_mode = FALSE;
1397 BOOL verify_as_sender = FALSE;
1398 BOOL version_printed = FALSE;
1399 uschar *alias_arg = NULL;
1400 uschar *called_as = US"";
1401 uschar *start_queue_run_id = NULL;
1402 uschar *stop_queue_run_id = NULL;
1403 uschar *expansion_test_message = NULL;
1404 uschar *ftest_domain = NULL;
1405 uschar *ftest_localpart = NULL;
1406 uschar *ftest_prefix = NULL;
1407 uschar *ftest_suffix = NULL;
1408 uschar *malware_test_file = NULL;
1409 uschar *real_sender_address;
1410 uschar *originator_home = US"/";
1414 struct stat statbuf;
1415 pid_t passed_qr_pid = (pid_t)0;
1416 int passed_qr_pipe = -1;
1417 gid_t group_list[NGROUPS_MAX];
1419 /* Possible options for -R and -S */
1421 static uschar *rsopts[] = { US"f", US"ff", US"r", US"rf", US"rff" };
1423 /* Need to define this in case we need to change the environment in order
1424 to get rid of a bogus time zone. We have to make it char rather than uschar
1425 because some OS define it in /usr/include/unistd.h. */
1427 extern char **environ;
1429 /* If the Exim user and/or group and/or the configuration file owner/group were
1430 defined by ref:name at build time, we must now find the actual uid/gid values.
1431 This is a feature to make the lives of binary distributors easier. */
1433 #ifdef EXIM_USERNAME
1434 if (route_finduser(US EXIM_USERNAME, &pw, &exim_uid))
1438 fprintf(stderr, "exim: refusing to run with uid 0 for \"%s\"\n",
1442 /* If ref:name uses a number as the name, route_finduser() returns
1443 TRUE with exim_uid set and pw coerced to NULL. */
1445 exim_gid = pw->pw_gid;
1446 #ifndef EXIM_GROUPNAME
1450 "exim: ref:name should specify a usercode, not a group.\n"
1451 "exim: can't let you get away with it unless you also specify a group.\n");
1458 fprintf(stderr, "exim: failed to find uid for user name \"%s\"\n",
1464 #ifdef EXIM_GROUPNAME
1465 if (!route_findgroup(US EXIM_GROUPNAME, &exim_gid))
1467 fprintf(stderr, "exim: failed to find gid for group name \"%s\"\n",
1473 #ifdef CONFIGURE_OWNERNAME
1474 if (!route_finduser(US CONFIGURE_OWNERNAME, NULL, &config_uid))
1476 fprintf(stderr, "exim: failed to find uid for user name \"%s\"\n",
1477 CONFIGURE_OWNERNAME);
1482 /* We default the system_filter_user to be the Exim run-time user, as a
1483 sane non-root value. */
1484 system_filter_uid = exim_uid;
1486 #ifdef CONFIGURE_GROUPNAME
1487 if (!route_findgroup(US CONFIGURE_GROUPNAME, &config_gid))
1489 fprintf(stderr, "exim: failed to find gid for group name \"%s\"\n",
1490 CONFIGURE_GROUPNAME);
1495 /* In the Cygwin environment, some initialization needs doing. It is fudged
1496 in by means of this macro. */
1502 /* Check a field which is patched when we are running Exim within its
1503 testing harness; do a fast initial check, and then the whole thing. */
1505 running_in_test_harness =
1506 *running_status == '<' && Ustrcmp(running_status, "<<<testing>>>") == 0;
1508 /* The C standard says that the equivalent of setlocale(LC_ALL, "C") is obeyed
1509 at the start of a program; however, it seems that some environments do not
1510 follow this. A "strange" locale can affect the formatting of timestamps, so we
1513 setlocale(LC_ALL, "C");
1515 /* Set up the default handler for timing using alarm(). */
1517 os_non_restarting_signal(SIGALRM, sigalrm_handler);
1519 /* Ensure we have a buffer for constructing log entries. Use malloc directly,
1520 because store_malloc writes a log entry on failure. */
1522 log_buffer = (uschar *)malloc(LOG_BUFFER_SIZE);
1523 if (log_buffer == NULL)
1525 fprintf(stderr, "exim: failed to get store for log buffer\n");
1529 /* Set log_stderr to stderr, provided that stderr exists. This gets reset to
1530 NULL when the daemon is run and the file is closed. We have to use this
1531 indirection, because some systems don't allow writing to the variable "stderr".
1534 if (fstat(fileno(stderr), &statbuf) >= 0) log_stderr = stderr;
1536 /* Arrange for the PCRE regex library to use our store functions. Note that
1537 the normal calls are actually macros that add additional arguments for
1538 debugging purposes so we have to assign specially constructed functions here.
1539 The default is to use store in the stacking pool, but this is overridden in the
1540 regex_must_compile() function. */
1542 pcre_malloc = function_store_get;
1543 pcre_free = function_dummy_free;
1545 /* Ensure there is a big buffer for temporary use in several places. It is put
1546 in malloc store so that it can be freed for enlargement if necessary. */
1548 big_buffer = store_malloc(big_buffer_size);
1550 /* Set up the handler for the data request signal, and set the initial
1551 descriptive text. */
1553 set_process_info("initializing");
1554 os_restarting_signal(SIGUSR1, usr1_handler);
1556 /* SIGHUP is used to get the daemon to reconfigure. It gets set as appropriate
1557 in the daemon code. For the rest of Exim's uses, we ignore it. */
1559 signal(SIGHUP, SIG_IGN);
1561 /* We don't want to die on pipe errors as the code is written to handle
1562 the write error instead. */
1564 signal(SIGPIPE, SIG_IGN);
1566 /* Under some circumstance on some OS, Exim can get called with SIGCHLD
1567 set to SIG_IGN. This causes subprocesses that complete before the parent
1568 process waits for them not to hang around, so when Exim calls wait(), nothing
1569 is there. The wait() code has been made robust against this, but let's ensure
1570 that SIGCHLD is set to SIG_DFL, because it's tidier to wait and get a process
1571 ending status. We use sigaction rather than plain signal() on those OS where
1572 SA_NOCLDWAIT exists, because we want to be sure it is turned off. (There was a
1573 problem on AIX with this.) */
1577 struct sigaction act;
1578 act.sa_handler = SIG_DFL;
1579 sigemptyset(&(act.sa_mask));
1581 sigaction(SIGCHLD, &act, NULL);
1584 signal(SIGCHLD, SIG_DFL);
1587 /* Save the arguments for use if we re-exec exim as a daemon after receiving
1592 /* Set up the version number. Set up the leading 'E' for the external form of
1593 message ids, set the pointer to the internal form, and initialize it to
1594 indicate no message being processed. */
1597 message_id_option[0] = '-';
1598 message_id_external = message_id_option + 1;
1599 message_id_external[0] = 'E';
1600 message_id = message_id_external + 1;
1603 /* Set the umask to zero so that any files Exim creates using open() are
1604 created with the modes that it specifies. NOTE: Files created with fopen() have
1605 a problem, which was not recognized till rather late (February 2006). With this
1606 umask, such files will be world writeable. (They are all content scanning files
1607 in the spool directory, which isn't world-accessible, so this is not a
1608 disaster, but it's untidy.) I don't want to change this overall setting,
1609 however, because it will interact badly with the open() calls. Instead, there's
1610 now a function called modefopen() that fiddles with the umask while calling
1615 /* Precompile the regular expression for matching a message id. Keep this in
1616 step with the code that generates ids in the accept.c module. We need to do
1617 this here, because the -M options check their arguments for syntactic validity
1618 using mac_ismsgid, which uses this. */
1621 regex_must_compile(US"^(?:[^\\W_]{6}-){2}[^\\W_]{2}$", FALSE, TRUE);
1623 /* Precompile the regular expression that is used for matching an SMTP error
1624 code, possibly extended, at the start of an error message. Note that the
1625 terminating whitespace character is included. */
1628 regex_must_compile(US"^\\d\\d\\d\\s(?:\\d\\.\\d\\d?\\d?\\.\\d\\d?\\d?\\s)?",
1631 #ifdef WHITELIST_D_MACROS
1632 /* Precompile the regular expression used to filter the content of macros
1633 given to -D for permissibility. */
1635 regex_whitelisted_macro =
1636 regex_must_compile(US"^[A-Za-z0-9_/.-]*$", FALSE, TRUE);
1640 /* If the program is called as "mailq" treat it as equivalent to "exim -bp";
1641 this seems to be a generally accepted convention, since one finds symbolic
1642 links called "mailq" in standard OS configurations. */
1644 if ((namelen == 5 && Ustrcmp(argv[0], "mailq") == 0) ||
1645 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/mailq", 6) == 0))
1648 receiving_message = FALSE;
1649 called_as = US"-mailq";
1652 /* If the program is called as "rmail" treat it as equivalent to
1653 "exim -i -oee", thus allowing UUCP messages to be input using non-SMTP mode,
1654 i.e. preventing a single dot on a line from terminating the message, and
1655 returning with zero return code, even in cases of error (provided an error
1656 message has been sent). */
1658 if ((namelen == 5 && Ustrcmp(argv[0], "rmail") == 0) ||
1659 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/rmail", 6) == 0))
1662 called_as = US"-rmail";
1663 errors_sender_rc = EXIT_SUCCESS;
1666 /* If the program is called as "rsmtp" treat it as equivalent to "exim -bS";
1667 this is a smail convention. */
1669 if ((namelen == 5 && Ustrcmp(argv[0], "rsmtp") == 0) ||
1670 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/rsmtp", 6) == 0))
1672 smtp_input = smtp_batched_input = TRUE;
1673 called_as = US"-rsmtp";
1676 /* If the program is called as "runq" treat it as equivalent to "exim -q";
1677 this is a smail convention. */
1679 if ((namelen == 4 && Ustrcmp(argv[0], "runq") == 0) ||
1680 (namelen > 4 && Ustrncmp(argv[0] + namelen - 5, "/runq", 5) == 0))
1683 receiving_message = FALSE;
1684 called_as = US"-runq";
1687 /* If the program is called as "newaliases" treat it as equivalent to
1688 "exim -bi"; this is a sendmail convention. */
1690 if ((namelen == 10 && Ustrcmp(argv[0], "newaliases") == 0) ||
1691 (namelen > 10 && Ustrncmp(argv[0] + namelen - 11, "/newaliases", 11) == 0))
1694 receiving_message = FALSE;
1695 called_as = US"-newaliases";
1698 /* Save the original effective uid for a couple of uses later. It should
1699 normally be root, but in some esoteric environments it may not be. */
1701 original_euid = geteuid();
1703 /* Get the real uid and gid. If the caller is root, force the effective uid/gid
1704 to be the same as the real ones. This makes a difference only if Exim is setuid
1705 (or setgid) to something other than root, which could be the case in some
1706 special configurations. */
1708 real_uid = getuid();
1709 real_gid = getgid();
1711 if (real_uid == root_uid)
1713 rv = setgid(real_gid);
1716 fprintf(stderr, "exim: setgid(%ld) failed: %s\n",
1717 (long int)real_gid, strerror(errno));
1720 rv = setuid(real_uid);
1723 fprintf(stderr, "exim: setuid(%ld) failed: %s\n",
1724 (long int)real_uid, strerror(errno));
1729 /* If neither the original real uid nor the original euid was root, Exim is
1730 running in an unprivileged state. */
1732 unprivileged = (real_uid != root_uid && original_euid != root_uid);
1734 /* Scan the program's arguments. Some can be dealt with right away; others are
1735 simply recorded for checking and handling afterwards. Do a high-level switch
1736 on the second character (the one after '-'), to save some effort. */
1738 for (i = 1; i < argc; i++)
1740 BOOL badarg = FALSE;
1741 uschar *arg = argv[i];
1745 /* An argument not starting with '-' is the start of a recipients list;
1746 break out of the options-scanning loop. */
1754 /* An option consistion of -- terminates the options */
1756 if (Ustrcmp(arg, "--") == 0)
1758 recipients_arg = i + 1;
1762 /* Handle flagged options */
1764 switchchar = arg[1];
1767 /* Make all -ex options synonymous with -oex arguments, since that
1768 is assumed by various callers. Also make -qR options synonymous with -R
1769 options, as that seems to be required as well. Allow for -qqR too, and
1770 the same for -S options. */
1772 if (Ustrncmp(arg+1, "oe", 2) == 0 ||
1773 Ustrncmp(arg+1, "qR", 2) == 0 ||
1774 Ustrncmp(arg+1, "qS", 2) == 0)
1776 switchchar = arg[2];
1779 else if (Ustrncmp(arg+1, "qqR", 3) == 0 || Ustrncmp(arg+1, "qqS", 3) == 0)
1781 switchchar = arg[3];
1783 queue_2stage = TRUE;
1786 /* Make -r synonymous with -f, since it is a documented alias */
1788 else if (arg[1] == 'r') switchchar = 'f';
1790 /* Make -ov synonymous with -v */
1792 else if (Ustrcmp(arg, "-ov") == 0)
1798 /* deal with --option_aliases */
1799 else if (switchchar == '-')
1801 if (Ustrcmp(argrest, "help") == 0)
1803 usage_wanted = TRUE;
1806 else if (Ustrcmp(argrest, "version") == 0)
1813 /* High-level switch on active initial letter */
1817 /* -Btype is a sendmail option for 7bit/8bit setting. Exim is 8-bit clean
1818 so has no need of it. */
1821 if (*argrest == 0) i++; /* Skip over the type */
1826 receiving_message = FALSE; /* Reset TRUE for -bm, -bS, -bs below */
1828 /* -bd: Run in daemon mode, awaiting SMTP connections.
1829 -bdf: Ditto, but in the foreground.
1832 if (*argrest == 'd')
1834 daemon_listen = TRUE;
1835 if (*(++argrest) == 'f') background_daemon = FALSE;
1836 else if (*argrest != 0) { badarg = TRUE; break; }
1839 /* -be: Run in expansion test mode
1840 -bem: Ditto, but read a message from a file first
1843 else if (*argrest == 'e')
1845 expansion_test = checking = TRUE;
1846 if (argrest[1] == 'm')
1848 if (++i >= argc) { badarg = TRUE; break; }
1849 expansion_test_message = argv[i];
1852 if (argrest[1] != 0) { badarg = TRUE; break; }
1855 /* -bF: Run system filter test */
1857 else if (*argrest == 'F')
1859 filter_test |= FTEST_SYSTEM;
1860 if (*(++argrest) != 0) { badarg = TRUE; break; }
1861 if (++i < argc) filter_test_sfile = argv[i]; else
1863 fprintf(stderr, "exim: file name expected after %s\n", argv[i-1]);
1868 /* -bf: Run user filter test
1869 -bfd: Set domain for filter testing
1870 -bfl: Set local part for filter testing
1871 -bfp: Set prefix for filter testing
1872 -bfs: Set suffix for filter testing
1875 else if (*argrest == 'f')
1877 if (*(++argrest) == 0)
1879 filter_test |= FTEST_USER;
1880 if (++i < argc) filter_test_ufile = argv[i]; else
1882 fprintf(stderr, "exim: file name expected after %s\n", argv[i-1]);
1890 fprintf(stderr, "exim: string expected after %s\n", arg);
1893 if (Ustrcmp(argrest, "d") == 0) ftest_domain = argv[i];
1894 else if (Ustrcmp(argrest, "l") == 0) ftest_localpart = argv[i];
1895 else if (Ustrcmp(argrest, "p") == 0) ftest_prefix = argv[i];
1896 else if (Ustrcmp(argrest, "s") == 0) ftest_suffix = argv[i];
1897 else { badarg = TRUE; break; }
1901 /* -bh: Host checking - an IP address must follow. */
1903 else if (Ustrcmp(argrest, "h") == 0 || Ustrcmp(argrest, "hc") == 0)
1905 if (++i >= argc) { badarg = TRUE; break; }
1906 sender_host_address = argv[i];
1907 host_checking = checking = log_testing_mode = TRUE;
1908 host_checking_callout = argrest[1] == 'c';
1911 /* -bi: This option is used by sendmail to initialize *the* alias file,
1912 though it has the -oA option to specify a different file. Exim has no
1913 concept of *the* alias file, but since Sun's YP make script calls
1914 sendmail this way, some support must be provided. */
1916 else if (Ustrcmp(argrest, "i") == 0) bi_option = TRUE;
1918 /* -bm: Accept and deliver message - the default option. Reinstate
1919 receiving_message, which got turned off for all -b options. */
1921 else if (Ustrcmp(argrest, "m") == 0) receiving_message = TRUE;
1923 /* -bmalware: test the filename given for malware */
1925 else if (Ustrcmp(argrest, "malware") == 0)
1927 if (++i >= argc) { badarg = TRUE; break; }
1928 malware_test_file = argv[i];
1931 /* -bnq: For locally originating messages, do not qualify unqualified
1932 addresses. In the envelope, this causes errors; in header lines they
1935 else if (Ustrcmp(argrest, "nq") == 0)
1937 allow_unqualified_sender = FALSE;
1938 allow_unqualified_recipient = FALSE;
1941 /* -bpxx: List the contents of the mail queue, in various forms. If
1942 the option is -bpc, just a queue count is needed. Otherwise, if the
1943 first letter after p is r, then order is random. */
1945 else if (*argrest == 'p')
1947 if (*(++argrest) == 'c')
1950 if (*(++argrest) != 0) badarg = TRUE;
1954 if (*argrest == 'r')
1956 list_queue_option = 8;
1959 else list_queue_option = 0;
1963 /* -bp: List the contents of the mail queue, top-level only */
1965 if (*argrest == 0) {}
1967 /* -bpu: List the contents of the mail queue, top-level undelivered */
1969 else if (Ustrcmp(argrest, "u") == 0) list_queue_option += 1;
1971 /* -bpa: List the contents of the mail queue, including all delivered */
1973 else if (Ustrcmp(argrest, "a") == 0) list_queue_option += 2;
1975 /* Unknown after -bp[r] */
1985 /* -bP: List the configuration variables given as the address list.
1986 Force -v, so configuration errors get displayed. */
1988 else if (Ustrcmp(argrest, "P") == 0)
1990 list_options = TRUE;
1991 debug_selector |= D_v;
1992 debug_file = stderr;
1995 /* -brt: Test retry configuration lookup */
1997 else if (Ustrcmp(argrest, "rt") == 0)
1999 test_retry_arg = i + 1;
2003 /* -brw: Test rewrite configuration */
2005 else if (Ustrcmp(argrest, "rw") == 0)
2007 test_rewrite_arg = i + 1;
2011 /* -bS: Read SMTP commands on standard input, but produce no replies -
2012 all errors are reported by sending messages. */
2014 else if (Ustrcmp(argrest, "S") == 0)
2015 smtp_input = smtp_batched_input = receiving_message = TRUE;
2017 /* -bs: Read SMTP commands on standard input and produce SMTP replies
2018 on standard output. */
2020 else if (Ustrcmp(argrest, "s") == 0) smtp_input = receiving_message = TRUE;
2022 /* -bt: address testing mode */
2024 else if (Ustrcmp(argrest, "t") == 0)
2025 address_test_mode = checking = log_testing_mode = TRUE;
2027 /* -bv: verify addresses */
2029 else if (Ustrcmp(argrest, "v") == 0)
2030 verify_address_mode = checking = log_testing_mode = TRUE;
2032 /* -bvs: verify sender addresses */
2034 else if (Ustrcmp(argrest, "vs") == 0)
2036 verify_address_mode = checking = log_testing_mode = TRUE;
2037 verify_as_sender = TRUE;
2040 /* -bV: Print version string and support details */
2042 else if (Ustrcmp(argrest, "V") == 0)
2044 printf("Exim version %s #%s built %s\n", version_string,
2045 version_cnumber, version_date);
2046 printf("%s\n", CS version_copyright);
2047 version_printed = TRUE;
2048 show_whats_supported(stdout);
2055 /* -C: change configuration file list; ignore if it isn't really
2056 a change! Enforce a prefix check if required. */
2061 if(++i < argc) argrest = argv[i]; else
2062 { badarg = TRUE; break; }
2064 if (Ustrcmp(config_main_filelist, argrest) != 0)
2066 #ifdef ALT_CONFIG_PREFIX
2068 int len = Ustrlen(ALT_CONFIG_PREFIX);
2069 uschar *list = argrest;
2071 while((filename = string_nextinlist(&list, &sep, big_buffer,
2072 big_buffer_size)) != NULL)
2074 if ((Ustrlen(filename) < len ||
2075 Ustrncmp(filename, ALT_CONFIG_PREFIX, len) != 0 ||
2076 Ustrstr(filename, "/../") != NULL) &&
2077 (Ustrcmp(filename, "/dev/null") != 0 || real_uid != root_uid))
2079 fprintf(stderr, "-C Permission denied\n");
2084 if (real_uid != root_uid)
2086 #ifdef TRUSTED_CONFIG_LIST
2088 if (real_uid != exim_uid
2089 #ifdef CONFIGURE_OWNER
2090 && real_uid != config_uid
2093 trusted_config = FALSE;
2096 FILE *trust_list = Ufopen(TRUSTED_CONFIG_LIST, "rb");
2099 struct stat statbuf;
2101 if (fstat(fileno(trust_list), &statbuf) != 0 ||
2102 (statbuf.st_uid != root_uid /* owner not root */
2103 #ifdef CONFIGURE_OWNER
2104 && statbuf.st_uid != config_uid /* owner not the special one */
2107 (statbuf.st_gid != root_gid /* group not root */
2108 #ifdef CONFIGURE_GROUP
2109 && statbuf.st_gid != config_gid /* group not the special one */
2111 && (statbuf.st_mode & 020) != 0 /* group writeable */
2113 (statbuf.st_mode & 2) != 0) /* world writeable */
2115 trusted_config = FALSE;
2120 /* Well, the trust list at least is up to scratch... */
2121 void *reset_point = store_get(0);
2122 uschar *trusted_configs[32];
2126 while (Ufgets(big_buffer, big_buffer_size, trust_list))
2128 uschar *start = big_buffer, *nl;
2129 while (*start && isspace(*start))
2133 nl = Ustrchr(start, '\n');
2136 trusted_configs[nr_configs++] = string_copy(start);
2137 if (nr_configs == 32)
2145 uschar *list = argrest;
2147 while (trusted_config && (filename = string_nextinlist(&list,
2148 &sep, big_buffer, big_buffer_size)) != NULL)
2150 for (i=0; i < nr_configs; i++)
2152 if (Ustrcmp(filename, trusted_configs[i]) == 0)
2155 if (i == nr_configs)
2157 trusted_config = FALSE;
2161 store_reset(reset_point);
2165 /* No valid prefixes found in trust_list file. */
2166 trusted_config = FALSE;
2172 /* Could not open trust_list file. */
2173 trusted_config = FALSE;
2177 /* Not root; don't trust config */
2178 trusted_config = FALSE;
2182 config_main_filelist = argrest;
2183 config_changed = TRUE;
2188 /* -D: set up a macro definition */
2191 #ifdef DISABLE_D_OPTION
2192 fprintf(stderr, "exim: -D is not available in this Exim binary\n");
2197 macro_item *mlast = NULL;
2200 uschar *s = argrest;
2202 while (isspace(*s)) s++;
2204 if (*s < 'A' || *s > 'Z')
2206 fprintf(stderr, "exim: macro name set by -D must start with "
2207 "an upper case letter\n");
2211 while (isalnum(*s) || *s == '_')
2213 if (ptr < sizeof(name)-1) name[ptr++] = *s;
2217 if (ptr == 0) { badarg = TRUE; break; }
2218 while (isspace(*s)) s++;
2221 if (*s++ != '=') { badarg = TRUE; break; }
2222 while (isspace(*s)) s++;
2225 for (m = macros; m != NULL; m = m->next)
2227 if (Ustrcmp(m->name, name) == 0)
2229 fprintf(stderr, "exim: duplicated -D in command line\n");
2235 m = store_get(sizeof(macro_item) + Ustrlen(name));
2237 m->command_line = TRUE;
2238 if (mlast == NULL) macros = m; else mlast->next = m;
2239 Ustrcpy(m->name, name);
2240 m->replacement = string_copy(s);
2242 if (clmacro_count >= MAX_CLMACROS)
2244 fprintf(stderr, "exim: too many -D options on command line\n");
2247 clmacros[clmacro_count++] = string_sprintf("-D%s=%s", m->name,
2253 /* -d: Set debug level (see also -v below) or set the drop_cr option.
2254 The latter is now a no-op, retained for compatibility only. If -dd is used,
2255 debugging subprocesses of the daemon is disabled. */
2258 if (Ustrcmp(argrest, "ropcr") == 0)
2260 /* drop_cr = TRUE; */
2263 /* Use an intermediate variable so that we don't set debugging while
2264 decoding the debugging bits. */
2268 unsigned int selector = D_default;
2271 if (*argrest == 'd')
2273 debug_daemon = TRUE;
2277 decode_bits(&selector, NULL, D_memory, 0, argrest, debug_options,
2278 debug_options_count, US"debug", 0);
2279 debug_selector = selector;
2284 /* -E: This is a local error message. This option is not intended for
2285 external use at all, but is not restricted to trusted callers because it
2286 does no harm (just suppresses certain error messages) and if Exim is run
2287 not setuid root it won't always be trusted when it generates error
2288 messages using this option. If there is a message id following -E, point
2289 message_reference at it, for logging. */
2292 local_error_message = TRUE;
2293 if (mac_ismsgid(argrest)) message_reference = argrest;
2297 /* -ex: The vacation program calls sendmail with the undocumented "-eq"
2298 option, so it looks as if historically the -oex options are also callable
2299 without the leading -o. So we have to accept them. Before the switch,
2300 anything starting -oe has been converted to -e. Exim does not support all
2301 of the sendmail error options. */
2304 if (Ustrcmp(argrest, "e") == 0)
2306 arg_error_handling = ERRORS_SENDER;
2307 errors_sender_rc = EXIT_SUCCESS;
2309 else if (Ustrcmp(argrest, "m") == 0) arg_error_handling = ERRORS_SENDER;
2310 else if (Ustrcmp(argrest, "p") == 0) arg_error_handling = ERRORS_STDERR;
2311 else if (Ustrcmp(argrest, "q") == 0) arg_error_handling = ERRORS_STDERR;
2312 else if (Ustrcmp(argrest, "w") == 0) arg_error_handling = ERRORS_SENDER;
2317 /* -F: Set sender's full name, used instead of the gecos entry from
2318 the password file. Since users can usually alter their gecos entries,
2319 there's no security involved in using this instead. The data can follow
2320 the -F or be in the next argument. */
2325 if(++i < argc) argrest = argv[i]; else
2326 { badarg = TRUE; break; }
2328 originator_name = argrest;
2329 sender_name_forced = TRUE;
2333 /* -f: Set sender's address - this value is only actually used if Exim is
2334 run by a trusted user, or if untrusted_set_sender is set and matches the
2335 address, except that the null address can always be set by any user. The
2336 test for this happens later, when the value given here is ignored when not
2337 permitted. For an untrusted user, the actual sender is still put in Sender:
2338 if it doesn't match the From: header (unless no_local_from_check is set).
2339 The data can follow the -f or be in the next argument. The -r switch is an
2340 obsolete form of -f but since there appear to be programs out there that
2341 use anything that sendmail has ever supported, better accept it - the
2342 synonymizing is done before the switch above.
2344 At this stage, we must allow domain literal addresses, because we don't
2345 know what the setting of allow_domain_literals is yet. Ditto for trailing
2346 dots and strip_trailing_dot. */
2354 if (i+1 < argc) argrest = argv[++i]; else
2355 { badarg = TRUE; break; }
2359 sender_address = string_sprintf(""); /* Ensure writeable memory */
2363 uschar *temp = argrest + Ustrlen(argrest) - 1;
2364 while (temp >= argrest && isspace(*temp)) temp--;
2365 if (temp >= argrest && *temp == '.') f_end_dot = TRUE;
2366 allow_domain_literals = TRUE;
2367 strip_trailing_dot = TRUE;
2368 sender_address = parse_extract_address(argrest, &errmess, &start, &end,
2369 &sender_address_domain, TRUE);
2370 allow_domain_literals = FALSE;
2371 strip_trailing_dot = FALSE;
2372 if (sender_address == NULL)
2374 fprintf(stderr, "exim: bad -f address \"%s\": %s\n", argrest, errmess);
2375 return EXIT_FAILURE;
2378 sender_address_forced = TRUE;
2382 /* This is some Sendmail thing which can be ignored */
2387 /* -h: Set the hop count for an incoming message. Exim does not currently
2388 support this; it always computes it by counting the Received: headers.
2389 To put it in will require a change to the spool header file format. */
2394 if(++i < argc) argrest = argv[i]; else
2395 { badarg = TRUE; break; }
2397 if (!isdigit(*argrest)) badarg = TRUE;
2401 /* -i: Set flag so dot doesn't end non-SMTP input (same as -oi, seems
2402 not to be documented for sendmail but mailx (at least) uses it) */
2405 if (*argrest == 0) dot_ends = FALSE; else badarg = TRUE;
2410 receiving_message = FALSE;
2412 /* -MC: continue delivery of another message via an existing open
2413 file descriptor. This option is used for an internal call by the
2414 smtp transport when there is a pending message waiting to go to an
2415 address to which it has got a connection. Five subsequent arguments are
2416 required: transport name, host name, IP address, sequence number, and
2417 message_id. Transports may decline to create new processes if the sequence
2418 number gets too big. The channel is stdin. This (-MC) must be the last
2419 argument. There's a subsequent check that the real-uid is privileged.
2421 If we are running in the test harness. delay for a bit, to let the process
2422 that set this one up complete. This makes for repeatability of the logging,
2425 if (Ustrcmp(argrest, "C") == 0)
2427 union sockaddr_46 interface_sock;
2428 EXIM_SOCKLEN_T size = sizeof(interface_sock);
2432 fprintf(stderr, "exim: too many or too few arguments after -MC\n");
2433 return EXIT_FAILURE;
2436 if (msg_action_arg >= 0)
2438 fprintf(stderr, "exim: incompatible arguments\n");
2439 return EXIT_FAILURE;
2442 continue_transport = argv[++i];
2443 continue_hostname = argv[++i];
2444 continue_host_address = argv[++i];
2445 continue_sequence = Uatoi(argv[++i]);
2446 msg_action = MSG_DELIVER;
2447 msg_action_arg = ++i;
2448 forced_delivery = TRUE;
2449 queue_run_pid = passed_qr_pid;
2450 queue_run_pipe = passed_qr_pipe;
2452 if (!mac_ismsgid(argv[i]))
2454 fprintf(stderr, "exim: malformed message id %s after -MC option\n",
2456 return EXIT_FAILURE;
2459 /* Set up $sending_ip_address and $sending_port */
2461 if (getsockname(fileno(stdin), (struct sockaddr *)(&interface_sock),
2463 sending_ip_address = host_ntoa(-1, &interface_sock, NULL,
2467 fprintf(stderr, "exim: getsockname() failed after -MC option: %s\n",
2469 return EXIT_FAILURE;
2472 if (running_in_test_harness) millisleep(500);
2476 /* -MCA: set the smtp_authenticated flag; this is useful only when it
2477 precedes -MC (see above). The flag indicates that the host to which
2478 Exim is connected has accepted an AUTH sequence. */
2480 else if (Ustrcmp(argrest, "CA") == 0)
2482 smtp_authenticated = TRUE;
2486 /* -MCP: set the smtp_use_pipelining flag; this is useful only when
2487 it preceded -MC (see above) */
2489 else if (Ustrcmp(argrest, "CP") == 0)
2491 smtp_use_pipelining = TRUE;
2495 /* -MCQ: pass on the pid of the queue-running process that started
2496 this chain of deliveries and the fd of its synchronizing pipe; this
2497 is useful only when it precedes -MC (see above) */
2499 else if (Ustrcmp(argrest, "CQ") == 0)
2501 if(++i < argc) passed_qr_pid = (pid_t)(Uatol(argv[i]));
2503 if(++i < argc) passed_qr_pipe = (int)(Uatol(argv[i]));
2508 /* -MCS: set the smtp_use_size flag; this is useful only when it
2509 precedes -MC (see above) */
2511 else if (Ustrcmp(argrest, "CS") == 0)
2513 smtp_use_size = TRUE;
2517 /* -MCT: set the tls_offered flag; this is useful only when it
2518 precedes -MC (see above). The flag indicates that the host to which
2519 Exim is connected has offered TLS support. */
2522 else if (Ustrcmp(argrest, "CT") == 0)
2529 /* -M[x]: various operations on the following list of message ids:
2530 -M deliver the messages, ignoring next retry times and thawing
2531 -Mc deliver the messages, checking next retry times, no thawing
2532 -Mf freeze the messages
2533 -Mg give up on the messages
2534 -Mt thaw the messages
2535 -Mrm remove the messages
2536 In the above cases, this must be the last option. There are also the
2537 following options which are followed by a single message id, and which
2538 act on that message. Some of them use the "recipient" addresses as well.
2539 -Mar add recipient(s)
2540 -Mmad mark all recipients delivered
2541 -Mmd mark recipients(s) delivered
2543 -Mset load a message for use with -be
2545 -Mvc show copy (of whole message, in RFC 2822 format)
2550 else if (*argrest == 0)
2552 msg_action = MSG_DELIVER;
2553 forced_delivery = deliver_force_thaw = TRUE;
2555 else if (Ustrcmp(argrest, "ar") == 0)
2557 msg_action = MSG_ADD_RECIPIENT;
2558 one_msg_action = TRUE;
2560 else if (Ustrcmp(argrest, "c") == 0) msg_action = MSG_DELIVER;
2561 else if (Ustrcmp(argrest, "es") == 0)
2563 msg_action = MSG_EDIT_SENDER;
2564 one_msg_action = TRUE;
2566 else if (Ustrcmp(argrest, "f") == 0) msg_action = MSG_FREEZE;
2567 else if (Ustrcmp(argrest, "g") == 0)
2569 msg_action = MSG_DELIVER;
2570 deliver_give_up = TRUE;
2572 else if (Ustrcmp(argrest, "mad") == 0)
2574 msg_action = MSG_MARK_ALL_DELIVERED;
2576 else if (Ustrcmp(argrest, "md") == 0)
2578 msg_action = MSG_MARK_DELIVERED;
2579 one_msg_action = TRUE;
2581 else if (Ustrcmp(argrest, "rm") == 0) msg_action = MSG_REMOVE;
2582 else if (Ustrcmp(argrest, "set") == 0)
2584 msg_action = MSG_LOAD;
2585 one_msg_action = TRUE;
2587 else if (Ustrcmp(argrest, "t") == 0) msg_action = MSG_THAW;
2588 else if (Ustrcmp(argrest, "vb") == 0)
2590 msg_action = MSG_SHOW_BODY;
2591 one_msg_action = TRUE;
2593 else if (Ustrcmp(argrest, "vc") == 0)
2595 msg_action = MSG_SHOW_COPY;
2596 one_msg_action = TRUE;
2598 else if (Ustrcmp(argrest, "vh") == 0)
2600 msg_action = MSG_SHOW_HEADER;
2601 one_msg_action = TRUE;
2603 else if (Ustrcmp(argrest, "vl") == 0)
2605 msg_action = MSG_SHOW_LOG;
2606 one_msg_action = TRUE;
2608 else { badarg = TRUE; break; }
2610 /* All the -Mxx options require at least one message id. */
2612 msg_action_arg = i + 1;
2613 if (msg_action_arg >= argc)
2615 fprintf(stderr, "exim: no message ids given after %s option\n", arg);
2616 return EXIT_FAILURE;
2619 /* Some require only message ids to follow */
2621 if (!one_msg_action)
2624 for (j = msg_action_arg; j < argc; j++) if (!mac_ismsgid(argv[j]))
2626 fprintf(stderr, "exim: malformed message id %s after %s option\n",
2628 return EXIT_FAILURE;
2630 goto END_ARG; /* Remaining args are ids */
2633 /* Others require only one message id, possibly followed by addresses,
2634 which will be handled as normal arguments. */
2638 if (!mac_ismsgid(argv[msg_action_arg]))
2640 fprintf(stderr, "exim: malformed message id %s after %s option\n",
2641 argv[msg_action_arg], arg);
2642 return EXIT_FAILURE;
2649 /* Some programs seem to call the -om option without the leading o;
2650 for sendmail it askes for "me too". Exim always does this. */
2653 if (*argrest != 0) badarg = TRUE;
2657 /* -N: don't do delivery - a debugging option that stops transports doing
2658 their thing. It implies debugging at the D_v level. */
2663 dont_deliver = TRUE;
2664 debug_selector |= D_v;
2665 debug_file = stderr;
2671 /* -n: This means "don't alias" in sendmail, apparently. Just ignore
2677 /* -O: Just ignore it. In sendmail, apparently -O option=value means set
2678 option to the specified value. This form uses long names. We need to handle
2679 -O option=value and -Ooption=value. */
2686 fprintf(stderr, "exim: string expected after -O\n");
2694 /* -oA: Set an argument for the bi command (sendmail's "alternate alias
2697 if (*argrest == 'A')
2699 alias_arg = argrest + 1;
2700 if (alias_arg[0] == 0)
2702 if (i+1 < argc) alias_arg = argv[++i]; else
2704 fprintf(stderr, "exim: string expected after -oA\n");
2710 /* -oB: Set a connection message max value for remote deliveries */
2712 else if (*argrest == 'B')
2714 uschar *p = argrest + 1;
2717 if (i+1 < argc && isdigit((argv[i+1][0]))) p = argv[++i]; else
2719 connection_max_messages = 1;
2728 fprintf(stderr, "exim: number expected after -oB\n");
2731 connection_max_messages = Uatoi(p);
2735 /* -odb: background delivery */
2737 else if (Ustrcmp(argrest, "db") == 0)
2739 synchronous_delivery = FALSE;
2740 arg_queue_only = FALSE;
2741 queue_only_set = TRUE;
2744 /* -odf: foreground delivery (smail-compatible option); same effect as
2745 -odi: interactive (synchronous) delivery (sendmail-compatible option)
2748 else if (Ustrcmp(argrest, "df") == 0 || Ustrcmp(argrest, "di") == 0)
2750 synchronous_delivery = TRUE;
2751 arg_queue_only = FALSE;
2752 queue_only_set = TRUE;
2755 /* -odq: queue only */
2757 else if (Ustrcmp(argrest, "dq") == 0)
2759 synchronous_delivery = FALSE;
2760 arg_queue_only = TRUE;
2761 queue_only_set = TRUE;
2764 /* -odqs: queue SMTP only - do local deliveries and remote routing,
2765 but no remote delivery */
2767 else if (Ustrcmp(argrest, "dqs") == 0)
2770 arg_queue_only = FALSE;
2771 queue_only_set = TRUE;
2774 /* -oex: Sendmail error flags. As these are also accepted without the
2775 leading -o prefix, for compatibility with vacation and other callers,
2776 they are handled with -e above. */
2778 /* -oi: Set flag so dot doesn't end non-SMTP input (same as -i)
2779 -oitrue: Another sendmail syntax for the same */
2781 else if (Ustrcmp(argrest, "i") == 0 ||
2782 Ustrcmp(argrest, "itrue") == 0)
2785 /* -oM*: Set various characteristics for an incoming message; actually
2786 acted on for trusted callers only. */
2788 else if (*argrest == 'M')
2792 fprintf(stderr, "exim: data expected after -o%s\n", argrest);
2796 /* -oMa: Set sender host address */
2798 if (Ustrcmp(argrest, "Ma") == 0) sender_host_address = argv[++i];
2800 /* -oMaa: Set authenticator name */
2802 else if (Ustrcmp(argrest, "Maa") == 0)
2803 sender_host_authenticated = argv[++i];
2805 /* -oMas: setting authenticated sender */
2807 else if (Ustrcmp(argrest, "Mas") == 0) authenticated_sender = argv[++i];
2809 /* -oMai: setting authenticated id */
2811 else if (Ustrcmp(argrest, "Mai") == 0) authenticated_id = argv[++i];
2813 /* -oMi: Set incoming interface address */
2815 else if (Ustrcmp(argrest, "Mi") == 0) interface_address = argv[++i];
2817 /* -oMr: Received protocol */
2819 else if (Ustrcmp(argrest, "Mr") == 0) received_protocol = argv[++i];
2821 /* -oMs: Set sender host name */
2823 else if (Ustrcmp(argrest, "Ms") == 0) sender_host_name = argv[++i];
2825 /* -oMt: Set sender ident */
2827 else if (Ustrcmp(argrest, "Mt") == 0)
2829 sender_ident_set = TRUE;
2830 sender_ident = argv[++i];
2833 /* Else a bad argument */
2842 /* -om: Me-too flag for aliases. Exim always does this. Some programs
2843 seem to call this as -m (undocumented), so that is also accepted (see
2846 else if (Ustrcmp(argrest, "m") == 0) {}
2848 /* -oo: An ancient flag for old-style addresses which still seems to
2849 crop up in some calls (see in SCO). */
2851 else if (Ustrcmp(argrest, "o") == 0) {}
2853 /* -oP <name>: set pid file path for daemon */
2855 else if (Ustrcmp(argrest, "P") == 0)
2856 override_pid_file_path = argv[++i];
2858 /* -or <n>: set timeout for non-SMTP acceptance
2859 -os <n>: set timeout for SMTP acceptance */
2861 else if (*argrest == 'r' || *argrest == 's')
2863 int *tp = (*argrest == 'r')?
2864 &arg_receive_timeout : &arg_smtp_receive_timeout;
2865 if (argrest[1] == 0)
2867 if (i+1 < argc) *tp= readconf_readtime(argv[++i], 0, FALSE);
2869 else *tp = readconf_readtime(argrest + 1, 0, FALSE);
2872 fprintf(stderr, "exim: bad time value %s: abandoned\n", argv[i]);
2877 /* -oX <list>: Override local_interfaces and/or default daemon ports */
2879 else if (Ustrcmp(argrest, "X") == 0)
2880 override_local_interfaces = argv[++i];
2882 /* Unknown -o argument */
2888 /* -ps: force Perl startup; -pd force delayed Perl startup */
2892 if (*argrest == 's' && argrest[1] == 0)
2894 perl_start_option = 1;
2897 if (*argrest == 'd' && argrest[1] == 0)
2899 perl_start_option = -1;
2904 /* -panythingelse is taken as the Sendmail-compatible argument -prval:sval,
2905 which sets the host protocol and host name */
2909 if (i+1 < argc) argrest = argv[++i]; else
2910 { badarg = TRUE; break; }
2915 uschar *hn = Ustrchr(argrest, ':');
2918 received_protocol = argrest;
2922 received_protocol = string_copyn(argrest, hn - argrest);
2923 sender_host_name = hn + 1;
2930 receiving_message = FALSE;
2931 if (queue_interval >= 0)
2933 fprintf(stderr, "exim: -q specified more than once\n");
2937 /* -qq...: Do queue runs in a 2-stage manner */
2939 if (*argrest == 'q')
2941 queue_2stage = TRUE;
2945 /* -qi...: Do only first (initial) deliveries */
2947 if (*argrest == 'i')
2949 queue_run_first_delivery = TRUE;
2953 /* -qf...: Run the queue, forcing deliveries
2954 -qff..: Ditto, forcing thawing as well */
2956 if (*argrest == 'f')
2958 queue_run_force = TRUE;
2959 if (*(++argrest) == 'f')
2961 deliver_force_thaw = TRUE;
2966 /* -q[f][f]l...: Run the queue only on local deliveries */
2968 if (*argrest == 'l')
2970 queue_run_local = TRUE;
2974 /* -q[f][f][l]: Run the queue, optionally forced, optionally local only,
2975 optionally starting from a given message id. */
2977 if (*argrest == 0 &&
2978 (i + 1 >= argc || argv[i+1][0] == '-' || mac_ismsgid(argv[i+1])))
2981 if (i+1 < argc && mac_ismsgid(argv[i+1]))
2982 start_queue_run_id = argv[++i];
2983 if (i+1 < argc && mac_ismsgid(argv[i+1]))
2984 stop_queue_run_id = argv[++i];
2987 /* -q[f][f][l]<n>: Run the queue at regular intervals, optionally forced,
2988 optionally local only. */
2993 queue_interval = readconf_readtime(argrest, 0, FALSE);
2995 queue_interval = readconf_readtime(argv[++i], 0, FALSE);
2996 if (queue_interval <= 0)
2998 fprintf(stderr, "exim: bad time value %s: abandoned\n", argv[i]);
3005 case 'R': /* Synonymous with -qR... */
3006 receiving_message = FALSE;
3008 /* -Rf: As -R (below) but force all deliveries,
3009 -Rff: Ditto, but also thaw all frozen messages,
3010 -Rr: String is regex
3011 -Rrf: Regex and force
3012 -Rrff: Regex and force and thaw
3014 in all cases provided there are no further characters in this
3020 for (i = 0; i < sizeof(rsopts)/sizeof(uschar *); i++)
3022 if (Ustrcmp(argrest, rsopts[i]) == 0)
3024 if (i != 2) queue_run_force = TRUE;
3025 if (i >= 2) deliver_selectstring_regex = TRUE;
3026 if (i == 1 || i == 4) deliver_force_thaw = TRUE;
3027 argrest += Ustrlen(rsopts[i]);
3032 /* -R: Set string to match in addresses for forced queue run to
3033 pick out particular messages. */
3037 if (i+1 < argc) deliver_selectstring = argv[++i]; else
3039 fprintf(stderr, "exim: string expected after -R\n");
3043 else deliver_selectstring = argrest;
3047 /* -r: an obsolete synonym for -f (see above) */
3050 /* -S: Like -R but works on sender. */
3052 case 'S': /* Synonymous with -qS... */
3053 receiving_message = FALSE;
3055 /* -Sf: As -S (below) but force all deliveries,
3056 -Sff: Ditto, but also thaw all frozen messages,
3057 -Sr: String is regex
3058 -Srf: Regex and force
3059 -Srff: Regex and force and thaw
3061 in all cases provided there are no further characters in this
3067 for (i = 0; i < sizeof(rsopts)/sizeof(uschar *); i++)
3069 if (Ustrcmp(argrest, rsopts[i]) == 0)
3071 if (i != 2) queue_run_force = TRUE;
3072 if (i >= 2) deliver_selectstring_sender_regex = TRUE;
3073 if (i == 1 || i == 4) deliver_force_thaw = TRUE;
3074 argrest += Ustrlen(rsopts[i]);
3079 /* -S: Set string to match in addresses for forced queue run to
3080 pick out particular messages. */
3084 if (i+1 < argc) deliver_selectstring_sender = argv[++i]; else
3086 fprintf(stderr, "exim: string expected after -S\n");
3090 else deliver_selectstring_sender = argrest;
3093 /* -Tqt is an option that is exclusively for use by the testing suite.
3094 It is not recognized in other circumstances. It allows for the setting up
3095 of explicit "queue times" so that various warning/retry things can be
3096 tested. Otherwise variability of clock ticks etc. cause problems. */
3099 if (running_in_test_harness && Ustrcmp(argrest, "qt") == 0)
3100 fudged_queue_times = argv[++i];
3105 /* -t: Set flag to extract recipients from body of message. */
3108 if (*argrest == 0) extract_recipients = TRUE;
3110 /* -ti: Set flag to extract recipients from body of message, and also
3111 specify that dot does not end the message. */
3113 else if (Ustrcmp(argrest, "i") == 0)
3115 extract_recipients = TRUE;
3119 /* -tls-on-connect: don't wait for STARTTLS (for old clients) */
3122 else if (Ustrcmp(argrest, "ls-on-connect") == 0) tls_on_connect = TRUE;
3129 /* -U: This means "initial user submission" in sendmail, apparently. The
3130 doc claims that in future sendmail may refuse syntactically invalid
3131 messages instead of fixing them. For the moment, we just ignore it. */
3137 /* -v: verify things - this is a very low-level debugging */
3142 debug_selector |= D_v;
3143 debug_file = stderr;
3149 /* -x: AIX uses this to indicate some fancy 8-bit character stuff:
3151 The -x flag tells the sendmail command that mail from a local
3152 mail program has National Language Support (NLS) extended characters
3153 in the body of the mail item. The sendmail command can send mail with
3154 extended NLS characters across networks that normally corrupts these
3157 As Exim is 8-bit clean, it just ignores this flag. */
3160 if (*argrest != 0) badarg = TRUE;
3163 /* All other initial characters are errors */
3168 } /* End of high-level switch statement */
3170 /* Failed to recognize the option, or syntax error */
3174 fprintf(stderr, "exim abandoned: unknown, malformed, or incomplete "
3175 "option %s\n", arg);
3181 /* If -R or -S have been specified without -q, assume a single queue run. */
3183 if ((deliver_selectstring != NULL || deliver_selectstring_sender != NULL) &&
3184 queue_interval < 0) queue_interval = 0;
3188 /* If usage_wanted is set we call the usage function - which never returns */
3189 if (usage_wanted) exim_usage(called_as);
3191 /* Arguments have been processed. Check for incompatibilities. */
3193 (smtp_input || extract_recipients || recipients_arg < argc) &&
3194 (daemon_listen || queue_interval >= 0 || bi_option ||
3195 test_retry_arg >= 0 || test_rewrite_arg >= 0 ||
3196 filter_test != FTEST_NONE || (msg_action_arg > 0 && !one_msg_action))
3199 msg_action_arg > 0 &&
3200 (daemon_listen || queue_interval >= 0 || list_options ||
3201 (checking && msg_action != MSG_LOAD) ||
3202 bi_option || test_retry_arg >= 0 || test_rewrite_arg >= 0)
3205 (daemon_listen || queue_interval >= 0) &&
3206 (sender_address != NULL || list_options || list_queue || checking ||
3210 daemon_listen && queue_interval == 0
3214 (checking || smtp_input || extract_recipients ||
3215 filter_test != FTEST_NONE || bi_option)
3218 verify_address_mode &&
3219 (address_test_mode || smtp_input || extract_recipients ||
3220 filter_test != FTEST_NONE || bi_option)
3223 address_test_mode && (smtp_input || extract_recipients ||
3224 filter_test != FTEST_NONE || bi_option)
3227 smtp_input && (sender_address != NULL || filter_test != FTEST_NONE ||
3231 deliver_selectstring != NULL && queue_interval < 0
3234 msg_action == MSG_LOAD &&
3235 (!expansion_test || expansion_test_message != NULL)
3239 fprintf(stderr, "exim: incompatible command-line options or arguments\n");
3243 /* If debugging is set up, set the file and the file descriptor to pass on to
3244 child processes. It should, of course, be 2 for stderr. Also, force the daemon
3245 to run in the foreground. */
3247 if (debug_selector != 0)
3249 debug_file = stderr;
3250 debug_fd = fileno(debug_file);
3251 background_daemon = FALSE;
3252 if (running_in_test_harness) millisleep(100); /* lets caller finish */
3253 if (debug_selector != D_v) /* -v only doesn't show this */
3255 debug_printf("Exim version %s uid=%ld gid=%ld pid=%d D=%x\n",
3256 version_string, (long int)real_uid, (long int)real_gid, (int)getpid(),
3258 if (!version_printed)
3259 show_whats_supported(stderr);
3263 /* When started with root privilege, ensure that the limits on the number of
3264 open files and the number of processes (where that is accessible) are
3265 sufficiently large, or are unset, in case Exim has been called from an
3266 environment where the limits are screwed down. Not all OS have the ability to
3267 change some of these limits. */
3271 DEBUG(D_any) debug_print_ids(US"Exim has no root privilege:");
3277 #ifdef RLIMIT_NOFILE
3278 if (getrlimit(RLIMIT_NOFILE, &rlp) < 0)
3280 log_write(0, LOG_MAIN|LOG_PANIC, "getrlimit(RLIMIT_NOFILE) failed: %s",
3282 rlp.rlim_cur = rlp.rlim_max = 0;
3285 /* I originally chose 1000 as a nice big number that was unlikely to
3286 be exceeded. It turns out that some older OS have a fixed upper limit of
3289 if (rlp.rlim_cur < 1000)
3291 rlp.rlim_cur = rlp.rlim_max = 1000;
3292 if (setrlimit(RLIMIT_NOFILE, &rlp) < 0)
3294 rlp.rlim_cur = rlp.rlim_max = 256;
3295 if (setrlimit(RLIMIT_NOFILE, &rlp) < 0)
3296 log_write(0, LOG_MAIN|LOG_PANIC, "setrlimit(RLIMIT_NOFILE) failed: %s",
3303 if (getrlimit(RLIMIT_NPROC, &rlp) < 0)
3305 log_write(0, LOG_MAIN|LOG_PANIC, "getrlimit(RLIMIT_NPROC) failed: %s",
3307 rlp.rlim_cur = rlp.rlim_max = 0;
3310 #ifdef RLIM_INFINITY
3311 if (rlp.rlim_cur != RLIM_INFINITY && rlp.rlim_cur < 1000)
3313 rlp.rlim_cur = rlp.rlim_max = RLIM_INFINITY;
3315 if (rlp.rlim_cur < 1000)
3317 rlp.rlim_cur = rlp.rlim_max = 1000;
3319 if (setrlimit(RLIMIT_NPROC, &rlp) < 0)
3320 log_write(0, LOG_MAIN|LOG_PANIC, "setrlimit(RLIMIT_NPROC) failed: %s",
3326 /* Exim is normally entered as root (but some special configurations are
3327 possible that don't do this). However, it always spins off sub-processes that
3328 set their uid and gid as required for local delivery. We don't want to pass on
3329 any extra groups that root may belong to, so we want to get rid of them all at
3332 We need to obey setgroups() at this stage, before possibly giving up root
3333 privilege for a changed configuration file, but later on we might need to
3334 check on the additional groups for the admin user privilege - can't do that
3335 till after reading the config, which might specify the exim gid. Therefore,
3336 save the group list here first. */
3338 group_count = getgroups(NGROUPS_MAX, group_list);
3339 if (group_count < 0)
3341 fprintf(stderr, "exim: getgroups() failed: %s\n", strerror(errno));
3345 /* There is a fundamental difference in some BSD systems in the matter of
3346 groups. FreeBSD and BSDI are known to be different; NetBSD and OpenBSD are
3347 known not to be different. On the "different" systems there is a single group
3348 list, and the first entry in it is the current group. On all other versions of
3349 Unix there is a supplementary group list, which is in *addition* to the current
3350 group. Consequently, to get rid of all extraneous groups on a "standard" system
3351 you pass over 0 groups to setgroups(), while on a "different" system you pass
3352 over a single group - the current group, which is always the first group in the
3353 list. Calling setgroups() with zero groups on a "different" system results in
3354 an error return. The following code should cope with both types of system.
3356 However, if this process isn't running as root, setgroups() can't be used
3357 since you have to be root to run it, even if throwing away groups. Not being
3358 root here happens only in some unusual configurations. We just ignore the
3361 if (setgroups(0, NULL) != 0)
3363 if (setgroups(1, group_list) != 0 && !unprivileged)
3365 fprintf(stderr, "exim: setgroups() failed: %s\n", strerror(errno));
3370 /* If the configuration file name has been altered by an argument on the
3371 command line (either a new file name or a macro definition) and the caller is
3372 not root, or if this is a filter testing run, remove any setuid privilege the
3373 program has and run as the underlying user.
3375 The exim user is locked out of this, which severely restricts the use of -C
3378 Otherwise, set the real ids to the effective values (should be root unless run
3379 from inetd, which it can either be root or the exim uid, if one is configured).
3381 There is a private mechanism for bypassing some of this, in order to make it
3382 possible to test lots of configurations automatically, without having either to
3383 recompile each time, or to patch in an actual configuration file name and other
3384 values (such as the path name). If running in the test harness, pretend that
3385 configuration file changes and macro definitions haven't happened. */
3388 (!trusted_config || /* Config changed, or */
3389 !macros_trusted()) && /* impermissible macros and */
3390 real_uid != root_uid && /* Not root, and */
3391 !running_in_test_harness /* Not fudged */
3393 expansion_test /* expansion testing */
3395 filter_test != FTEST_NONE) /* Filter testing */
3397 setgroups(group_count, group_list);
3398 exim_setugid(real_uid, real_gid, FALSE,
3399 US"-C, -D, -be or -bf forces real uid");
3400 removed_privilege = TRUE;
3402 /* In the normal case when Exim is called like this, stderr is available
3403 and should be used for any logging information because attempts to write
3404 to the log will usually fail. To arrange this, we unset really_exim. However,
3405 if no stderr is available there is no point - we might as well have a go
3406 at the log (if it fails, syslog will be written).
3408 Note that if the invoker is Exim, the logs remain available. Messing with
3409 this causes unlogged successful deliveries. */
3411 if ((log_stderr != NULL) && (real_uid != exim_uid))
3412 really_exim = FALSE;
3415 /* Privilege is to be retained for the moment. It may be dropped later,
3416 depending on the job that this Exim process has been asked to do. For now, set
3417 the real uid to the effective so that subsequent re-execs of Exim are done by a
3420 else exim_setugid(geteuid(), getegid(), FALSE, US"forcing real = effective");
3422 /* If testing a filter, open the file(s) now, before wasting time doing other
3423 setups and reading the message. */
3425 if ((filter_test & FTEST_SYSTEM) != 0)
3427 filter_sfd = Uopen(filter_test_sfile, O_RDONLY, 0);
3430 fprintf(stderr, "exim: failed to open %s: %s\n", filter_test_sfile,
3432 return EXIT_FAILURE;
3436 if ((filter_test & FTEST_USER) != 0)
3438 filter_ufd = Uopen(filter_test_ufile, O_RDONLY, 0);
3441 fprintf(stderr, "exim: failed to open %s: %s\n", filter_test_ufile,
3443 return EXIT_FAILURE;
3447 /* Read the main runtime configuration data; this gives up if there
3448 is a failure. It leaves the configuration file open so that the subsequent
3449 configuration data for delivery can be read if needed. */
3453 /* Handle the decoding of logging options. */
3455 decode_bits(&log_write_selector, &log_extra_selector, 0, 0,
3456 log_selector_string, log_options, log_options_count, US"log", 0);
3460 debug_printf("configuration file is %s\n", config_main_filename);
3461 debug_printf("log selectors = %08x %08x\n", log_write_selector,
3462 log_extra_selector);
3465 /* If domain literals are not allowed, check the sender address that was
3466 supplied with -f. Ditto for a stripped trailing dot. */
3468 if (sender_address != NULL)
3470 if (sender_address[sender_address_domain] == '[' && !allow_domain_literals)
3472 fprintf(stderr, "exim: bad -f address \"%s\": domain literals not "
3473 "allowed\n", sender_address);
3474 return EXIT_FAILURE;
3476 if (f_end_dot && !strip_trailing_dot)
3478 fprintf(stderr, "exim: bad -f address \"%s.\": domain is malformed "
3479 "(trailing dot not allowed)\n", sender_address);
3480 return EXIT_FAILURE;
3484 /* Paranoia check of maximum lengths of certain strings. There is a check
3485 on the length of the log file path in log.c, which will come into effect
3486 if there are any calls to write the log earlier than this. However, if we
3487 get this far but the string is very long, it is better to stop now than to
3488 carry on and (e.g.) receive a message and then have to collapse. The call to
3489 log_write() from here will cause the ultimate panic collapse if the complete
3490 file name exceeds the buffer length. */
3492 if (Ustrlen(log_file_path) > 200)
3493 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3494 "log_file_path is longer than 200 chars: aborting");
3496 if (Ustrlen(pid_file_path) > 200)
3497 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3498 "pid_file_path is longer than 200 chars: aborting");
3500 if (Ustrlen(spool_directory) > 200)
3501 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3502 "spool_directory is longer than 200 chars: aborting");
3504 /* Length check on the process name given to syslog for its TAG field,
3505 which is only permitted to be 32 characters or less. See RFC 3164. */
3507 if (Ustrlen(syslog_processname) > 32)
3508 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3509 "syslog_processname is longer than 32 chars: aborting");
3511 /* In some operating systems, the environment variable TMPDIR controls where
3512 temporary files are created; Exim doesn't use these (apart from when delivering
3513 to MBX mailboxes), but called libraries such as DBM libraries may require them.
3514 If TMPDIR is found in the environment, reset it to the value defined in the
3515 TMPDIR macro, if this macro is defined. */
3520 for (p = USS environ; *p != NULL; p++)
3522 if (Ustrncmp(*p, "TMPDIR=", 7) == 0 &&
3523 Ustrcmp(*p+7, TMPDIR) != 0)
3525 uschar *newp = malloc(Ustrlen(TMPDIR) + 8);
3526 sprintf(CS newp, "TMPDIR=%s", TMPDIR);
3528 DEBUG(D_any) debug_printf("reset TMPDIR=%s in environment\n", TMPDIR);
3534 /* Timezone handling. If timezone_string is "utc", set a flag to cause all
3535 timestamps to be in UTC (gmtime() is used instead of localtime()). Otherwise,
3536 we may need to get rid of a bogus timezone setting. This can arise when Exim is
3537 called by a user who has set the TZ variable. This then affects the timestamps
3538 in log files and in Received: headers, and any created Date: header lines. The
3539 required timezone is settable in the configuration file, so nothing can be done
3540 about this earlier - but hopefully nothing will normally be logged earlier than
3541 this. We have to make a new environment if TZ is wrong, but don't bother if
3542 timestamps_utc is set, because then all times are in UTC anyway. */
3544 if (timezone_string != NULL && strcmpic(timezone_string, US"UTC") == 0)
3546 timestamps_utc = TRUE;
3550 uschar *envtz = US getenv("TZ");
3551 if ((envtz == NULL && timezone_string != NULL) ||
3553 (timezone_string == NULL ||
3554 Ustrcmp(timezone_string, envtz) != 0)))
3556 uschar **p = USS environ;
3560 while (*p++ != NULL) count++;
3561 if (envtz == NULL) count++;
3562 newp = new = malloc(sizeof(uschar *) * (count + 1));
3563 for (p = USS environ; *p != NULL; p++)
3565 if (Ustrncmp(*p, "TZ=", 3) == 0) continue;
3568 if (timezone_string != NULL)
3570 *newp = malloc(Ustrlen(timezone_string) + 4);
3571 sprintf(CS *newp++, "TZ=%s", timezone_string);
3576 DEBUG(D_any) debug_printf("Reset TZ to %s: time is %s\n", timezone_string,
3577 tod_stamp(tod_log));
3581 /* Handle the case when we have removed the setuid privilege because of -C or
3582 -D. This means that the caller of Exim was not root.
3584 There is a problem if we were running as the Exim user. The sysadmin may
3585 expect this case to retain privilege because "the binary was called by the
3586 Exim user", but it hasn't, because either the -D option set macros, or the
3587 -C option set a non-trusted configuration file. There are two possibilities:
3589 (1) If deliver_drop_privilege is set, Exim is not going to re-exec in order
3590 to do message deliveries. Thus, the fact that it is running as a
3591 non-privileged user is plausible, and might be wanted in some special
3592 configurations. However, really_exim will have been set false when
3593 privilege was dropped, to stop Exim trying to write to its normal log
3594 files. Therefore, re-enable normal log processing, assuming the sysadmin
3595 has set up the log directory correctly.
3597 (2) If deliver_drop_privilege is not set, the configuration won't work as
3598 apparently intended, and so we log a panic message. In order to retain
3599 root for -C or -D, the caller must either be root or be invoking a
3600 trusted configuration file (when deliver_drop_privilege is false). */
3602 if (removed_privilege && (!trusted_config || macros != NULL) &&
3603 real_uid == exim_uid)
3605 if (deliver_drop_privilege)
3606 really_exim = TRUE; /* let logging work normally */
3608 log_write(0, LOG_MAIN|LOG_PANIC,
3609 "exim user lost privilege for using %s option",
3610 trusted_config? "-D" : "-C");
3613 /* Start up Perl interpreter if Perl support is configured and there is a
3614 perl_startup option, and the configuration or the command line specifies
3615 initializing starting. Note that the global variables are actually called
3616 opt_perl_xxx to avoid clashing with perl's namespace (perl_*). */
3619 if (perl_start_option != 0)
3620 opt_perl_at_start = (perl_start_option > 0);
3621 if (opt_perl_at_start && opt_perl_startup != NULL)
3624 DEBUG(D_any) debug_printf("Starting Perl interpreter\n");
3625 errstr = init_perl(opt_perl_startup);
3628 fprintf(stderr, "exim: error in perl_startup code: %s\n", errstr);
3629 return EXIT_FAILURE;
3631 opt_perl_started = TRUE;
3633 #endif /* EXIM_PERL */
3635 /* Initialise lookup_list
3636 If debugging, already called above via version reporting.
3637 This does mean that debugging causes the list to be initialised while root.
3638 This *should* be harmless -- all modules are loaded from a fixed dir and
3639 it's code that would, if not a module, be part of Exim already. */
3642 /* Log the arguments of the call if the configuration file said so. This is
3643 a debugging feature for finding out what arguments certain MUAs actually use.
3644 Don't attempt it if logging is disabled, or if listing variables or if
3645 verifying/testing addresses or expansions. */
3647 if (((debug_selector & D_any) != 0 || (log_extra_selector & LX_arguments) != 0)
3648 && really_exim && !list_options && !checking)
3651 uschar *p = big_buffer;
3653 (void)getcwd(CS p+4, big_buffer_size - 4);
3655 (void)string_format(p, big_buffer_size - (p - big_buffer), " %d args:", argc);
3657 for (i = 0; i < argc; i++)
3659 int len = Ustrlen(argv[i]);
3662 if (p + len + 8 >= big_buffer + big_buffer_size)
3665 log_write(0, LOG_MAIN, "%s", big_buffer);
3666 Ustrcpy(big_buffer, "...");
3669 printing = string_printing(argv[i]);
3670 if (printing[0] == 0) quote = US"\""; else
3672 uschar *pp = printing;
3674 while (*pp != 0) if (isspace(*pp++)) { quote = US"\""; break; }
3676 sprintf(CS p, " %s%.*s%s", quote, (int)(big_buffer_size -
3677 (p - big_buffer) - 4), printing, quote);
3681 if ((log_extra_selector & LX_arguments) != 0)
3682 log_write(0, LOG_MAIN, "%s", big_buffer);
3684 debug_printf("%s\n", big_buffer);
3687 /* Set the working directory to be the top-level spool directory. We don't rely
3688 on this in the code, which always uses fully qualified names, but it's useful
3689 for core dumps etc. Don't complain if it fails - the spool directory might not
3690 be generally accessible and calls with the -C option (and others) have lost
3691 privilege by now. Before the chdir, we try to ensure that the directory exists.
3694 if (Uchdir(spool_directory) != 0)
3696 (void)directory_make(spool_directory, US"", SPOOL_DIRECTORY_MODE, FALSE);
3697 (void)Uchdir(spool_directory);
3700 /* Handle calls with the -bi option. This is a sendmail option to rebuild *the*
3701 alias file. Exim doesn't have such a concept, but this call is screwed into
3702 Sun's YP makefiles. Handle this by calling a configured script, as the real
3703 user who called Exim. The -oA option can be used to pass an argument to the
3708 (void)fclose(config_file);
3709 if (bi_command != NULL)
3713 argv[i++] = bi_command;
3714 if (alias_arg != NULL) argv[i++] = alias_arg;
3717 setgroups(group_count, group_list);
3718 exim_setugid(real_uid, real_gid, FALSE, US"running bi_command");
3720 DEBUG(D_exec) debug_printf("exec %.256s %.256s\n", argv[0],
3721 (argv[1] == NULL)? US"" : argv[1]);
3723 execv(CS argv[0], (char *const *)argv);
3724 fprintf(stderr, "exim: exec failed: %s\n", strerror(errno));
3729 DEBUG(D_any) debug_printf("-bi used but bi_command not set; exiting\n");
3734 /* If an action on specific messages is requested, or if a daemon or queue
3735 runner is being started, we need to know if Exim was called by an admin user.
3736 This is the case if the real user is root or exim, or if the real group is
3737 exim, or if one of the supplementary groups is exim or a group listed in
3738 admin_groups. We don't fail all message actions immediately if not admin_user,
3739 since some actions can be performed by non-admin users. Instead, set admin_user
3740 for later interrogation. */
3742 if (real_uid == root_uid || real_uid == exim_uid || real_gid == exim_gid)
3747 for (i = 0; i < group_count; i++)
3749 if (group_list[i] == exim_gid) admin_user = TRUE;
3750 else if (admin_groups != NULL)
3752 for (j = 1; j <= (int)(admin_groups[0]); j++)
3753 if (admin_groups[j] == group_list[i])
3754 { admin_user = TRUE; break; }
3756 if (admin_user) break;
3760 /* Another group of privileged users are the trusted users. These are root,
3761 exim, and any caller matching trusted_users or trusted_groups. Trusted callers
3762 are permitted to specify sender_addresses with -f on the command line, and
3763 other message parameters as well. */
3765 if (real_uid == root_uid || real_uid == exim_uid)
3766 trusted_caller = TRUE;
3771 if (trusted_users != NULL)
3773 for (i = 1; i <= (int)(trusted_users[0]); i++)
3774 if (trusted_users[i] == real_uid)
3775 { trusted_caller = TRUE; break; }
3778 if (!trusted_caller && trusted_groups != NULL)
3780 for (i = 1; i <= (int)(trusted_groups[0]); i++)
3782 if (trusted_groups[i] == real_gid)
3783 trusted_caller = TRUE;
3784 else for (j = 0; j < group_count; j++)
3786 if (trusted_groups[i] == group_list[j])
3787 { trusted_caller = TRUE; break; }
3789 if (trusted_caller) break;
3794 if (trusted_caller) DEBUG(D_any) debug_printf("trusted user\n");
3795 if (admin_user) DEBUG(D_any) debug_printf("admin user\n");
3797 /* Only an admin user may start the daemon or force a queue run in the default
3798 configuration, but the queue run restriction can be relaxed. Only an admin
3799 user may request that a message be returned to its sender forthwith. Only an
3800 admin user may specify a debug level greater than D_v (because it might show
3801 passwords, etc. in lookup queries). Only an admin user may request a queue
3802 count. Only an admin user can use the test interface to scan for email
3803 (because Exim will be in the spool dir and able to look at mails). */
3807 BOOL debugset = (debug_selector & ~D_v) != 0;
3808 if (deliver_give_up || daemon_listen || malware_test_file ||
3809 (count_queue && queue_list_requires_admin) ||
3810 (list_queue && queue_list_requires_admin) ||
3811 (queue_interval >= 0 && prod_requires_admin) ||
3812 (debugset && !running_in_test_harness))
3814 fprintf(stderr, "exim:%s permission denied\n", debugset? " debugging" : "");
3819 /* If the real user is not root or the exim uid, the argument for passing
3820 in an open TCP/IP connection for another message is not permitted, nor is
3821 running with the -N option for any delivery action, unless this call to exim is
3822 one that supplied an input message, or we are using a patched exim for
3823 regression testing. */
3825 if (real_uid != root_uid && real_uid != exim_uid &&
3826 (continue_hostname != NULL ||
3828 (queue_interval >= 0 || daemon_listen || msg_action_arg > 0)
3829 )) && !running_in_test_harness)
3831 fprintf(stderr, "exim: Permission denied\n");
3832 return EXIT_FAILURE;
3835 /* If the caller is not trusted, certain arguments are ignored when running for
3836 real, but are permitted when checking things (-be, -bv, -bt, -bh, -bf, -bF).
3837 Note that authority for performing certain actions on messages is tested in the
3838 queue_action() function. */
3840 if (!trusted_caller && !checking && filter_test == FTEST_NONE)
3842 sender_host_name = sender_host_address = interface_address =
3843 sender_ident = received_protocol = NULL;
3844 sender_host_port = interface_port = 0;
3845 sender_host_authenticated = authenticated_sender = authenticated_id = NULL;
3848 /* If a sender host address is set, extract the optional port number off the
3849 end of it and check its syntax. Do the same thing for the interface address.
3850 Exim exits if the syntax is bad. */
3854 if (sender_host_address != NULL)
3855 sender_host_port = check_port(sender_host_address);
3856 if (interface_address != NULL)
3857 interface_port = check_port(interface_address);
3860 /* If an SMTP message is being received check to see if the standard input is a
3861 TCP/IP socket. If it is, we assume that Exim was called from inetd if the
3862 caller is root or the Exim user, or if the port is a privileged one. Otherwise,
3867 union sockaddr_46 inetd_sock;
3868 EXIM_SOCKLEN_T size = sizeof(inetd_sock);
3869 if (getpeername(0, (struct sockaddr *)(&inetd_sock), &size) == 0)
3871 int family = ((struct sockaddr *)(&inetd_sock))->sa_family;
3872 if (family == AF_INET || family == AF_INET6)
3874 union sockaddr_46 interface_sock;
3875 size = sizeof(interface_sock);
3877 if (getsockname(0, (struct sockaddr *)(&interface_sock), &size) == 0)
3878 interface_address = host_ntoa(-1, &interface_sock, NULL,
3881 if (host_is_tls_on_connect_port(interface_port)) tls_on_connect = TRUE;
3883 if (real_uid == root_uid || real_uid == exim_uid || interface_port < 1024)
3886 sender_host_address = host_ntoa(-1, (struct sockaddr *)(&inetd_sock),
3887 NULL, &sender_host_port);
3888 if (mua_wrapper) log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Input from "
3889 "inetd is not supported when mua_wrapper is set");
3894 "exim: Permission denied (unprivileged user, unprivileged port)\n");
3895 return EXIT_FAILURE;
3901 /* If the load average is going to be needed while receiving a message, get it
3902 now for those OS that require the first call to os_getloadavg() to be done as
3903 root. There will be further calls later for each message received. */
3905 #ifdef LOAD_AVG_NEEDS_ROOT
3906 if (receiving_message &&
3907 (queue_only_load >= 0 ||
3908 (is_inetd && smtp_load_reserve >= 0)
3911 load_average = OS_GETLOADAVG();
3915 /* The queue_only configuration option can be overridden by -odx on the command
3916 line, except that if queue_only_override is false, queue_only cannot be unset
3917 from the command line. */
3919 if (queue_only_set && (queue_only_override || arg_queue_only))
3920 queue_only = arg_queue_only;
3922 /* The receive_timeout and smtp_receive_timeout options can be overridden by
3925 if (arg_receive_timeout >= 0) receive_timeout = arg_receive_timeout;
3926 if (arg_smtp_receive_timeout >= 0)
3927 smtp_receive_timeout = arg_smtp_receive_timeout;
3929 /* If Exim was started with root privilege, unless we have already removed the
3930 root privilege above as a result of -C, -D, -be, -bf or -bF, remove it now
3931 except when starting the daemon or doing some kind of delivery or address
3932 testing (-bt). These are the only cases when root need to be retained. We run
3933 as exim for -bv and -bh. However, if deliver_drop_privilege is set, root is
3934 retained only for starting the daemon. We always do the initgroups() in this
3935 situation (controlled by the TRUE below), in order to be as close as possible
3936 to the state Exim usually runs in. */
3938 if (!unprivileged && /* originally had root AND */
3939 !removed_privilege && /* still got root AND */
3940 !daemon_listen && /* not starting the daemon */
3941 queue_interval <= 0 && /* (either kind of daemon) */
3943 deliver_drop_privilege || /* requested unprivileged */
3945 queue_interval < 0 && /* not running the queue */
3946 (msg_action_arg < 0 || /* and */
3947 msg_action != MSG_DELIVER) && /* not delivering and */
3948 (!checking || !address_test_mode) /* not address checking */
3952 exim_setugid(exim_uid, exim_gid, TRUE, US"privilege not needed");
3955 /* When we are retaining a privileged uid, we still change to the exim gid. */
3960 rv = setgid(exim_gid);
3961 /* Impact of failure is that some stuff might end up with an incorrect group.
3962 We track this for failures from root, since any attempt to change privilege
3963 by root should succeed and failures should be examined. For non-root,
3964 there's no security risk. For me, it's { exim -bV } on a just-built binary,
3965 no need to complain then. */
3968 if (!(unprivileged || removed_privilege))
3971 "exim: changing group failed: %s\n", strerror(errno));
3975 DEBUG(D_any) debug_printf("changing group to %ld failed: %s\n",
3976 (long int)exim_gid, strerror(errno));
3980 /* Handle a request to scan a file for malware */
3981 if (malware_test_file)
3983 #ifdef WITH_CONTENT_SCAN
3985 set_process_info("scanning file for malware");
3986 result = malware_in_file(malware_test_file);
3989 printf("No malware found.\n");
3994 printf("Malware lookup returned non-okay/fail: %d\n", result);
3998 printf("Malware found: %s\n", malware_name);
4000 printf("Malware scan detected malware of unknown name.\n");
4002 printf("Malware scanning not enabled at compile time.\n");
4007 /* Handle a request to list the delivery queue */
4011 set_process_info("listing the queue");
4012 queue_list(list_queue_option, argv + recipients_arg, argc - recipients_arg);
4016 /* Handle a request to count the delivery queue */
4020 set_process_info("counting the queue");
4025 /* Handle actions on specific messages, except for the force delivery and
4026 message load actions, which are done below. Some actions take a whole list of
4027 message ids, which are known to continue up to the end of the arguments. Others
4028 take a single message id and then operate on the recipients list. */
4030 if (msg_action_arg > 0 && msg_action != MSG_DELIVER && msg_action != MSG_LOAD)
4032 int yield = EXIT_SUCCESS;
4033 set_process_info("acting on specified messages");
4035 if (!one_msg_action)
4037 for (i = msg_action_arg; i < argc; i++)
4038 if (!queue_action(argv[i], msg_action, NULL, 0, 0))
4039 yield = EXIT_FAILURE;
4042 else if (!queue_action(argv[msg_action_arg], msg_action, argv, argc,
4043 recipients_arg)) yield = EXIT_FAILURE;
4047 /* All the modes below here require the remaining configuration sections
4048 to be read, except that we can skip over the ACL setting when delivering
4049 specific messages, or doing a queue run. (For various testing cases we could
4050 skip too, but as they are rare, it doesn't really matter.) The argument is TRUE
4053 readconf_rest(msg_action_arg > 0 || (queue_interval == 0 && !daemon_listen));
4055 /* The configuration data will have been read into POOL_PERM because we won't
4056 ever want to reset back past it. Change the current pool to POOL_MAIN. In fact,
4057 this is just a bit of pedantic tidiness. It wouldn't really matter if the
4058 configuration were read into POOL_MAIN, because we don't do any resets till
4059 later on. However, it seems right, and it does ensure that both pools get used.
4062 store_pool = POOL_MAIN;
4064 /* Handle the -brt option. This is for checking out retry configurations.
4065 The next three arguments are a domain name or a complete address, and
4066 optionally two error numbers. All it does is to call the function that
4067 scans the retry configuration data. */
4069 if (test_retry_arg >= 0)
4071 retry_config *yield;
4072 int basic_errno = 0;
4076 if (test_retry_arg >= argc)
4078 printf("-brt needs a domain or address argument\n");
4079 exim_exit(EXIT_FAILURE);
4081 s1 = argv[test_retry_arg++];
4084 /* If the first argument contains no @ and no . it might be a local user
4085 or it might be a single-component name. Treat as a domain. */
4087 if (Ustrchr(s1, '@') == NULL && Ustrchr(s1, '.') == NULL)
4089 printf("Warning: \"%s\" contains no '@' and no '.' characters. It is "
4090 "being \ntreated as a one-component domain, not as a local part.\n\n",
4094 /* There may be an optional second domain arg. */
4096 if (test_retry_arg < argc && Ustrchr(argv[test_retry_arg], '.') != NULL)
4097 s2 = argv[test_retry_arg++];
4099 /* The final arg is an error name */
4101 if (test_retry_arg < argc)
4103 uschar *ss = argv[test_retry_arg];
4105 readconf_retry_error(ss, ss + Ustrlen(ss), &basic_errno, &more_errno);
4108 printf("%s\n", CS error);
4109 return EXIT_FAILURE;
4112 /* For the {MAIL,RCPT,DATA}_4xx errors, a value of 255 means "any", and a
4113 code > 100 as an error is for matching codes to the decade. Turn them into
4114 a real error code, off the decade. */
4116 if (basic_errno == ERRNO_MAIL4XX ||
4117 basic_errno == ERRNO_RCPT4XX ||
4118 basic_errno == ERRNO_DATA4XX)
4120 int code = (more_errno >> 8) & 255;
4122 more_errno = (more_errno & 0xffff00ff) | (21 << 8);
4123 else if (code > 100)
4124 more_errno = (more_errno & 0xffff00ff) | ((code - 96) << 8);
4128 yield = retry_find_config(s1, s2, basic_errno, more_errno);
4129 if (yield == NULL) printf("No retry information found\n"); else
4132 more_errno = yield->more_errno;
4133 printf("Retry rule: %s ", yield->pattern);
4135 if (yield->basic_errno == ERRNO_EXIMQUOTA)
4137 printf("quota%s%s ",
4138 (more_errno > 0)? "_" : "",
4139 (more_errno > 0)? readconf_printtime(more_errno) : US"");
4141 else if (yield->basic_errno == ECONNREFUSED)
4143 printf("refused%s%s ",
4144 (more_errno > 0)? "_" : "",
4145 (more_errno == 'M')? "MX" :
4146 (more_errno == 'A')? "A" : "");
4148 else if (yield->basic_errno == ETIMEDOUT)
4151 if ((more_errno & RTEF_CTOUT) != 0) printf("_connect");
4153 if (more_errno != 0) printf("_%s",
4154 (more_errno == 'M')? "MX" : "A");
4157 else if (yield->basic_errno == ERRNO_AUTHFAIL)
4158 printf("auth_failed ");
4161 for (r = yield->rules; r != NULL; r = r->next)
4163 printf("%c,%s", r->rule, readconf_printtime(r->timeout)); /* Do not */
4164 printf(",%s", readconf_printtime(r->p1)); /* amalgamate */
4170 printf(",%d.", x/1000);
4184 exim_exit(EXIT_SUCCESS);
4187 /* Handle a request to list one or more configuration options */
4191 set_process_info("listing variables");
4192 if (recipients_arg >= argc) readconf_print(US"all", NULL);
4193 else for (i = recipients_arg; i < argc; i++)
4196 (Ustrcmp(argv[i], "router") == 0 ||
4197 Ustrcmp(argv[i], "transport") == 0 ||
4198 Ustrcmp(argv[i], "authenticator") == 0 ||
4199 Ustrcmp(argv[i], "macro") == 0))
4201 readconf_print(argv[i+1], argv[i]);
4204 else readconf_print(argv[i], NULL);
4206 exim_exit(EXIT_SUCCESS);
4210 /* Handle a request to deliver one or more messages that are already on the
4211 queue. Values of msg_action other than MSG_DELIVER and MSG_LOAD are dealt with
4212 above. MSG_LOAD is handled with -be (which is the only time it applies) below.
4214 Delivery of specific messages is typically used for a small number when
4215 prodding by hand (when the option forced_delivery will be set) or when
4216 re-execing to regain root privilege. Each message delivery must happen in a
4217 separate process, so we fork a process for each one, and run them sequentially
4218 so that debugging output doesn't get intertwined, and to avoid spawning too
4219 many processes if a long list is given. However, don't fork for the last one;
4220 this saves a process in the common case when Exim is called to deliver just one
4223 if (msg_action_arg > 0 && msg_action != MSG_LOAD)
4225 if (prod_requires_admin && !admin_user)
4227 fprintf(stderr, "exim: Permission denied\n");
4228 exim_exit(EXIT_FAILURE);
4230 set_process_info("delivering specified messages");
4231 if (deliver_give_up) forced_delivery = deliver_force_thaw = TRUE;
4232 for (i = msg_action_arg; i < argc; i++)
4237 (void)deliver_message(argv[i], forced_delivery, deliver_give_up);
4238 else if ((pid = fork()) == 0)
4240 (void)deliver_message(argv[i], forced_delivery, deliver_give_up);
4241 _exit(EXIT_SUCCESS);
4245 fprintf(stderr, "failed to fork delivery process for %s: %s\n", argv[i],
4247 exim_exit(EXIT_FAILURE);
4251 exim_exit(EXIT_SUCCESS);
4255 /* If only a single queue run is requested, without SMTP listening, we can just
4256 turn into a queue runner, with an optional starting message id. */
4258 if (queue_interval == 0 && !daemon_listen)
4260 DEBUG(D_queue_run) debug_printf("Single queue run%s%s%s%s\n",
4261 (start_queue_run_id == NULL)? US"" : US" starting at ",
4262 (start_queue_run_id == NULL)? US"" : start_queue_run_id,
4263 (stop_queue_run_id == NULL)? US"" : US" stopping at ",
4264 (stop_queue_run_id == NULL)? US"" : stop_queue_run_id);
4265 set_process_info("running the queue (single queue run)");
4266 queue_run(start_queue_run_id, stop_queue_run_id, FALSE);
4267 exim_exit(EXIT_SUCCESS);
4271 /* Find the login name of the real user running this process. This is always
4272 needed when receiving a message, because it is written into the spool file. It
4273 may also be used to construct a from: or a sender: header, and in this case we
4274 need the user's full name as well, so save a copy of it, checked for RFC822
4275 syntax and munged if necessary, if it hasn't previously been set by the -F
4276 argument. We may try to get the passwd entry more than once, in case NIS or
4277 other delays are in evidence. Save the home directory for use in filter testing
4282 if ((pw = getpwuid(real_uid)) != NULL)
4284 originator_login = string_copy(US pw->pw_name);
4285 originator_home = string_copy(US pw->pw_dir);
4287 /* If user name has not been set by -F, set it from the passwd entry
4288 unless -f has been used to set the sender address by a trusted user. */
4290 if (originator_name == NULL)
4292 if (sender_address == NULL ||
4293 (!trusted_caller && filter_test == FTEST_NONE))
4295 uschar *name = US pw->pw_gecos;
4296 uschar *amp = Ustrchr(name, '&');
4299 /* Most Unix specify that a '&' character in the gecos field is
4300 replaced by a copy of the login name, and some even specify that
4301 the first character should be upper cased, so that's what we do. */
4306 string_format(buffer, sizeof(buffer), "%.*s%n%s%s",
4307 amp - name, name, &loffset, originator_login, amp + 1);
4308 buffer[loffset] = toupper(buffer[loffset]);
4312 /* If a pattern for matching the gecos field was supplied, apply
4313 it and then expand the name string. */
4315 if (gecos_pattern != NULL && gecos_name != NULL)
4318 re = regex_must_compile(gecos_pattern, FALSE, TRUE); /* Use malloc */
4320 if (regex_match_and_setup(re, name, 0, -1))
4322 uschar *new_name = expand_string(gecos_name);
4324 if (new_name != NULL)
4326 DEBUG(D_receive) debug_printf("user name \"%s\" extracted from "
4327 "gecos field \"%s\"\n", new_name, name);
4330 else DEBUG(D_receive) debug_printf("failed to expand gecos_name string "
4331 "\"%s\": %s\n", gecos_name, expand_string_message);
4333 else DEBUG(D_receive) debug_printf("gecos_pattern \"%s\" did not match "
4334 "gecos field \"%s\"\n", gecos_pattern, name);
4335 store_free((void *)re);
4337 originator_name = string_copy(name);
4340 /* A trusted caller has used -f but not -F */
4342 else originator_name = US"";
4345 /* Break the retry loop */
4350 if (++i > finduser_retries) break;
4354 /* If we cannot get a user login, log the incident and give up, unless the
4355 configuration specifies something to use. When running in the test harness,
4356 any setting of unknown_login overrides the actual name. */
4358 if (originator_login == NULL || running_in_test_harness)
4360 if (unknown_login != NULL)
4362 originator_login = expand_string(unknown_login);
4363 if (originator_name == NULL && unknown_username != NULL)
4364 originator_name = expand_string(unknown_username);
4365 if (originator_name == NULL) originator_name = US"";
4367 if (originator_login == NULL)
4368 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Failed to get user name for uid %d",
4372 /* Ensure that the user name is in a suitable form for use as a "phrase" in an
4375 originator_name = string_copy(parse_fix_phrase(originator_name,
4376 Ustrlen(originator_name), big_buffer, big_buffer_size));
4378 /* If a message is created by this call of Exim, the uid/gid of its originator
4379 are those of the caller. These values are overridden if an existing message is
4380 read in from the spool. */
4382 originator_uid = real_uid;
4383 originator_gid = real_gid;
4385 DEBUG(D_receive) debug_printf("originator: uid=%d gid=%d login=%s name=%s\n",
4386 (int)originator_uid, (int)originator_gid, originator_login, originator_name);
4388 /* Run in daemon and/or queue-running mode. The function daemon_go() never
4389 returns. We leave this till here so that the originator_ fields are available
4390 for incoming messages via the daemon. The daemon cannot be run in mua_wrapper
4393 if (daemon_listen || queue_interval > 0)
4397 fprintf(stderr, "Daemon cannot be run when mua_wrapper is set\n");
4398 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Daemon cannot be run when "
4399 "mua_wrapper is set");
4404 /* If the sender ident has not been set (by a trusted caller) set it to
4405 the caller. This will get overwritten below for an inetd call. If a trusted
4406 caller has set it empty, unset it. */
4408 if (sender_ident == NULL) sender_ident = originator_login;
4409 else if (sender_ident[0] == 0) sender_ident = NULL;
4411 /* Handle the -brw option, which is for checking out rewriting rules. Cause log
4412 writes (on errors) to go to stderr instead. Can't do this earlier, as want the
4413 originator_* variables set. */
4415 if (test_rewrite_arg >= 0)
4417 really_exim = FALSE;
4418 if (test_rewrite_arg >= argc)
4420 printf("-brw needs an address argument\n");
4421 exim_exit(EXIT_FAILURE);
4423 rewrite_test(argv[test_rewrite_arg]);
4424 exim_exit(EXIT_SUCCESS);
4427 /* A locally-supplied message is considered to be coming from a local user
4428 unless a trusted caller supplies a sender address with -f, or is passing in the
4429 message via SMTP (inetd invocation or otherwise). */
4431 if ((sender_address == NULL && !smtp_input) ||
4432 (!trusted_caller && filter_test == FTEST_NONE))
4434 sender_local = TRUE;
4436 /* A trusted caller can supply authenticated_sender and authenticated_id
4437 via -oMas and -oMai and if so, they will already be set. Otherwise, force
4438 defaults except when host checking. */
4440 if (authenticated_sender == NULL && !host_checking)
4441 authenticated_sender = string_sprintf("%s@%s", originator_login,
4442 qualify_domain_sender);
4443 if (authenticated_id == NULL && !host_checking)
4444 authenticated_id = originator_login;
4447 /* Trusted callers are always permitted to specify the sender address.
4448 Untrusted callers may specify it if it matches untrusted_set_sender, or if what
4449 is specified is the empty address. However, if a trusted caller does not
4450 specify a sender address for SMTP input, we leave sender_address unset. This
4451 causes the MAIL commands to be honoured. */
4453 if ((!smtp_input && sender_address == NULL) ||
4454 !receive_check_set_sender(sender_address))
4456 /* Either the caller is not permitted to set a general sender, or this is
4457 non-SMTP input and the trusted caller has not set a sender. If there is no
4458 sender, or if a sender other than <> is set, override with the originator's
4459 login (which will get qualified below), except when checking things. */
4461 if (sender_address == NULL /* No sender_address set */
4463 (sender_address[0] != 0 && /* Non-empty sender address, AND */
4464 !checking && /* Not running tests, AND */
4465 filter_test == FTEST_NONE)) /* Not testing a filter */
4467 sender_address = originator_login;
4468 sender_address_forced = FALSE;
4469 sender_address_domain = 0;
4473 /* Remember whether an untrusted caller set the sender address */
4475 sender_set_untrusted = sender_address != originator_login && !trusted_caller;
4477 /* Ensure that the sender address is fully qualified unless it is the empty
4478 address, which indicates an error message, or doesn't exist (root caller, smtp
4479 interface, no -f argument). */
4481 if (sender_address != NULL && sender_address[0] != 0 &&
4482 sender_address_domain == 0)
4483 sender_address = string_sprintf("%s@%s", local_part_quote(sender_address),
4484 qualify_domain_sender);
4486 DEBUG(D_receive) debug_printf("sender address = %s\n", sender_address);
4488 /* Handle a request to verify a list of addresses, or test them for delivery.
4489 This must follow the setting of the sender address, since routers can be
4490 predicated upon the sender. If no arguments are given, read addresses from
4491 stdin. Set debug_level to at least D_v to get full output for address testing.
4494 if (verify_address_mode || address_test_mode)
4497 int flags = vopt_qualify;
4499 if (verify_address_mode)
4501 if (!verify_as_sender) flags |= vopt_is_recipient;
4502 DEBUG(D_verify) debug_print_ids(US"Verifying:");
4507 flags |= vopt_is_recipient;
4508 debug_selector |= D_v;
4509 debug_file = stderr;
4510 debug_fd = fileno(debug_file);
4511 DEBUG(D_verify) debug_print_ids(US"Address testing:");
4514 if (recipients_arg < argc)
4516 while (recipients_arg < argc)
4518 uschar *s = argv[recipients_arg++];
4521 BOOL finished = FALSE;
4522 uschar *ss = parse_find_address_end(s, FALSE);
4523 if (*ss == ',') *ss = 0; else finished = TRUE;
4524 test_address(s, flags, &exit_value);
4527 while (*(++s) != 0 && (*s == ',' || isspace(*s)));
4534 uschar *s = get_stdinput(NULL, NULL);
4535 if (s == NULL) break;
4536 test_address(s, flags, &exit_value);
4540 exim_exit(exit_value);
4543 /* Handle expansion checking. Either expand items on the command line, or read
4544 from stdin if there aren't any. If -Mset was specified, load the message so
4545 that its variables can be used, but restrict this facility to admin users.
4546 Otherwise, if -bem was used, read a message from stdin. */
4550 if (msg_action_arg > 0 && msg_action == MSG_LOAD)
4552 uschar spoolname[256]; /* Not big_buffer; used in spool_read_header() */
4555 fprintf(stderr, "exim: permission denied\n");
4558 message_id = argv[msg_action_arg];
4559 (void)string_format(spoolname, sizeof(spoolname), "%s-H", message_id);
4560 if (!spool_open_datafile(message_id))
4561 printf ("Failed to load message datafile %s\n", message_id);
4562 if (spool_read_header(spoolname, TRUE, FALSE) != spool_read_OK)
4563 printf ("Failed to load message %s\n", message_id);
4566 /* Read a test message from a file. We fudge it up to be on stdin, saving
4567 stdin itself for later reading of expansion strings. */
4569 else if (expansion_test_message != NULL)
4571 int save_stdin = dup(0);
4572 int fd = Uopen(expansion_test_message, O_RDONLY, 0);
4575 fprintf(stderr, "exim: failed to open %s: %s\n", expansion_test_message,
4577 return EXIT_FAILURE;
4580 filter_test = FTEST_USER; /* Fudge to make it look like filter test */
4581 message_ended = END_NOTENDED;
4582 read_message_body(receive_msg(extract_recipients));
4583 message_linecount += body_linecount;
4584 (void)dup2(save_stdin, 0);
4585 (void)close(save_stdin);
4586 clearerr(stdin); /* Required by Darwin */
4589 /* Allow $recipients for this testing */
4591 enable_dollar_recipients = TRUE;
4593 /* Expand command line items */
4595 if (recipients_arg < argc)
4597 while (recipients_arg < argc)
4599 uschar *s = argv[recipients_arg++];
4600 uschar *ss = expand_string(s);
4601 if (ss == NULL) printf ("Failed: %s\n", expand_string_message);
4602 else printf("%s\n", CS ss);
4610 char *(*fn_readline)(const char *) = NULL;
4611 void (*fn_addhist)(const char *) = NULL;
4614 void *dlhandle = set_readline(&fn_readline, &fn_addhist);
4620 uschar *source = get_stdinput(fn_readline, fn_addhist);
4621 if (source == NULL) break;
4622 ss = expand_string(source);
4624 printf ("Failed: %s\n", expand_string_message);
4625 else printf("%s\n", CS ss);
4629 if (dlhandle != NULL) dlclose(dlhandle);
4633 /* The data file will be open after -Mset */
4635 if (deliver_datafile >= 0)
4637 (void)close(deliver_datafile);
4638 deliver_datafile = -1;
4641 exim_exit(EXIT_SUCCESS);
4645 /* The active host name is normally the primary host name, but it can be varied
4646 for hosts that want to play several parts at once. We need to ensure that it is
4647 set for host checking, and for receiving messages. */
4649 smtp_active_hostname = primary_hostname;
4650 if (raw_active_hostname != NULL)
4652 uschar *nah = expand_string(raw_active_hostname);
4655 if (!expand_string_forcedfail)
4656 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to expand \"%s\" "
4657 "(smtp_active_hostname): %s", raw_active_hostname,
4658 expand_string_message);
4660 else if (nah[0] != 0) smtp_active_hostname = nah;
4663 /* Handle host checking: this facility mocks up an incoming SMTP call from a
4664 given IP address so that the blocking and relay configuration can be tested.
4665 Unless a sender_ident was set by -oMt, we discard it (the default is the
4666 caller's login name). An RFC 1413 call is made only if we are running in the
4667 test harness and an incoming interface and both ports are specified, because
4668 there is no TCP/IP call to find the ident for. */
4675 if (!sender_ident_set)
4677 sender_ident = NULL;
4678 if (running_in_test_harness && sender_host_port != 0 &&
4679 interface_address != NULL && interface_port != 0)
4680 verify_get_ident(1413);
4683 /* In case the given address is a non-canonical IPv6 address, canonicize
4684 it. The code works for both IPv4 and IPv6, as it happens. */
4686 size = host_aton(sender_host_address, x);
4687 sender_host_address = store_get(48); /* large enough for full IPv6 */
4688 (void)host_nmtoa(size, x, -1, sender_host_address, ':');
4690 /* Now set up for testing */
4692 host_build_sender_fullhost();
4696 sender_local = FALSE;
4697 sender_host_notsocket = TRUE;
4698 debug_file = stderr;
4699 debug_fd = fileno(debug_file);
4700 fprintf(stdout, "\n**** SMTP testing session as if from host %s\n"
4701 "**** but without any ident (RFC 1413) callback.\n"
4702 "**** This is not for real!\n\n",
4703 sender_host_address);
4705 if (verify_check_host(&hosts_connection_nolog) == OK)
4706 log_write_selector &= ~L_smtp_connection;
4707 log_write(L_smtp_connection, LOG_MAIN, "%s", smtp_get_connection_info());
4709 /* NOTE: We do *not* call smtp_log_no_mail() if smtp_start_session() fails,
4710 because a log line has already been written for all its failure exists
4711 (usually "connection refused: <reason>") and writing another one is
4712 unnecessary clutter. */
4714 if (smtp_start_session())
4716 reset_point = store_get(0);
4719 store_reset(reset_point);
4720 if (smtp_setup_msg() <= 0) break;
4721 if (!receive_msg(FALSE)) break;
4725 exim_exit(EXIT_SUCCESS);
4729 /* Arrange for message reception if recipients or SMTP were specified;
4730 otherwise complain unless a version print (-bV) happened or this is a filter
4731 verification test. In the former case, show the configuration file name. */
4733 if (recipients_arg >= argc && !extract_recipients && !smtp_input)
4735 if (version_printed)
4737 printf("Configuration file is %s\n", config_main_filename);
4738 return EXIT_SUCCESS;
4741 if (filter_test == FTEST_NONE)
4742 exim_usage(called_as);
4746 /* If mua_wrapper is set, Exim is being used to turn an MUA that submits on the
4747 standard input into an MUA that submits to a smarthost over TCP/IP. We know
4748 that we are not called from inetd, because that is rejected above. The
4749 following configuration settings are forced here:
4751 (1) Synchronous delivery (-odi)
4752 (2) Errors to stderr (-oep == -oeq)
4753 (3) No parallel remote delivery
4754 (4) Unprivileged delivery
4756 We don't force overall queueing options because there are several of them;
4757 instead, queueing is avoided below when mua_wrapper is set. However, we do need
4758 to override any SMTP queueing. */
4762 synchronous_delivery = TRUE;
4763 arg_error_handling = ERRORS_STDERR;
4764 remote_max_parallel = 1;
4765 deliver_drop_privilege = TRUE;
4767 queue_smtp_domains = NULL;
4771 /* Prepare to accept one or more new messages on the standard input. When a
4772 message has been read, its id is returned in message_id[]. If doing immediate
4773 delivery, we fork a delivery process for each received message, except for the
4774 last one, where we can save a process switch.
4776 It is only in non-smtp mode that error_handling is allowed to be changed from
4777 its default of ERRORS_SENDER by argument. (Idle thought: are any of the
4778 sendmail error modes other than -oem ever actually used? Later: yes.) */
4780 if (!smtp_input) error_handling = arg_error_handling;
4782 /* If this is an inetd call, ensure that stderr is closed to prevent panic
4783 logging being sent down the socket and make an identd call to get the
4788 (void)fclose(stderr);
4789 exim_nullstd(); /* Re-open to /dev/null */
4790 verify_get_ident(IDENT_PORT);
4791 host_build_sender_fullhost();
4792 set_process_info("handling incoming connection from %s via inetd",
4796 /* If the sender host address has been set, build sender_fullhost if it hasn't
4797 already been done (which it will have been for inetd). This caters for the
4798 case when it is forced by -oMa. However, we must flag that it isn't a socket,
4799 so that the test for IP options is skipped for -bs input. */
4801 if (sender_host_address != NULL && sender_fullhost == NULL)
4803 host_build_sender_fullhost();
4804 set_process_info("handling incoming connection from %s via -oMa",
4806 sender_host_notsocket = TRUE;
4809 /* Otherwise, set the sender host as unknown except for inetd calls. This
4810 prevents host checking in the case of -bs not from inetd and also for -bS. */
4812 else if (!is_inetd) sender_host_unknown = TRUE;
4814 /* If stdout does not exist, then dup stdin to stdout. This can happen
4815 if exim is started from inetd. In this case fd 0 will be set to the socket,
4816 but fd 1 will not be set. This also happens for passed SMTP channels. */
4818 if (fstat(1, &statbuf) < 0) (void)dup2(0, 1);
4820 /* Set up the incoming protocol name and the state of the program. Root is
4821 allowed to force received protocol via the -oMr option above. If we have come
4822 via inetd, the process info has already been set up. We don't set
4823 received_protocol here for smtp input, as it varies according to
4824 batch/HELO/EHLO/AUTH/TLS. */
4828 if (!is_inetd) set_process_info("accepting a local %sSMTP message from <%s>",
4829 smtp_batched_input? "batched " : "",
4830 (sender_address!= NULL)? sender_address : originator_login);
4834 if (received_protocol == NULL)
4835 received_protocol = string_sprintf("local%s", called_as);
4836 set_process_info("accepting a local non-SMTP message from <%s>",
4840 /* Initialize the session_local_queue-only flag (this will be ignored if
4841 mua_wrapper is set) */
4844 session_local_queue_only = queue_only;
4846 /* For non-SMTP and for batched SMTP input, check that there is enough space on
4847 the spool if so configured. On failure, we must not attempt to send an error
4848 message! (For interactive SMTP, the check happens at MAIL FROM and an SMTP
4849 error code is given.) */
4851 if ((!smtp_input || smtp_batched_input) && !receive_check_fs(0))
4853 fprintf(stderr, "exim: insufficient disk space\n");
4854 return EXIT_FAILURE;
4857 /* If this is smtp input of any kind, real or batched, handle the start of the
4860 NOTE: We do *not* call smtp_log_no_mail() if smtp_start_session() fails,
4861 because a log line has already been written for all its failure exists
4862 (usually "connection refused: <reason>") and writing another one is
4863 unnecessary clutter. */
4869 if (verify_check_host(&hosts_connection_nolog) == OK)
4870 log_write_selector &= ~L_smtp_connection;
4871 log_write(L_smtp_connection, LOG_MAIN, "%s", smtp_get_connection_info());
4872 if (!smtp_start_session())
4875 exim_exit(EXIT_SUCCESS);
4879 /* Otherwise, set up the input size limit here. */
4883 thismessage_size_limit = expand_string_integer(message_size_limit, TRUE);
4884 if (expand_string_message != NULL)
4886 if (thismessage_size_limit == -1)
4887 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to expand "
4888 "message_size_limit: %s", expand_string_message);
4890 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "invalid value for "
4891 "message_size_limit: %s", expand_string_message);
4895 /* Loop for several messages when reading SMTP input. If we fork any child
4896 processes, we don't want to wait for them unless synchronous delivery is
4897 requested, so set SIGCHLD to SIG_IGN in that case. This is not necessarily the
4898 same as SIG_DFL, despite the fact that documentation often lists the default as
4899 "ignore". This is a confusing area. This is what I know:
4901 At least on some systems (e.g. Solaris), just setting SIG_IGN causes child
4902 processes that complete simply to go away without ever becoming defunct. You
4903 can't then wait for them - but we don't want to wait for them in the
4904 non-synchronous delivery case. However, this behaviour of SIG_IGN doesn't
4905 happen for all OS (e.g. *BSD is different).
4907 But that's not the end of the story. Some (many? all?) systems have the
4908 SA_NOCLDWAIT option for sigaction(). This requests the behaviour that Solaris
4909 has by default, so it seems that the difference is merely one of default
4910 (compare restarting vs non-restarting signals).
4912 To cover all cases, Exim sets SIG_IGN with SA_NOCLDWAIT here if it can. If not,
4913 it just sets SIG_IGN. To be on the safe side it also calls waitpid() at the end
4914 of the loop below. Paranoia rules.
4916 February 2003: That's *still* not the end of the story. There are now versions
4917 of Linux (where SIG_IGN does work) that are picky. If, having set SIG_IGN, a
4918 process then calls waitpid(), a grumble is written to the system log, because
4919 this is logically inconsistent. In other words, it doesn't like the paranoia.
4920 As a consequenc of this, the waitpid() below is now excluded if we are sure
4921 that SIG_IGN works. */
4923 if (!synchronous_delivery)
4926 struct sigaction act;
4927 act.sa_handler = SIG_IGN;
4928 sigemptyset(&(act.sa_mask));
4929 act.sa_flags = SA_NOCLDWAIT;
4930 sigaction(SIGCHLD, &act, NULL);
4932 signal(SIGCHLD, SIG_IGN);
4936 /* Save the current store pool point, for resetting at the start of
4937 each message, and save the real sender address, if any. */
4939 reset_point = store_get(0);
4940 real_sender_address = sender_address;
4942 /* Loop to receive messages; receive_msg() returns TRUE if there are more
4943 messages to be read (SMTP input), or FALSE otherwise (not SMTP, or SMTP channel
4948 store_reset(reset_point);
4951 /* Handle the SMTP case; call smtp_setup_mst() to deal with the initial SMTP
4952 input and build the recipients list, before calling receive_msg() to read the
4953 message proper. Whatever sender address is given in the SMTP transaction is
4954 often ignored for local senders - we use the actual sender, which is normally
4955 either the underlying user running this process or a -f argument provided by
4956 a trusted caller. It is saved in real_sender_address. The test for whether to
4957 accept the SMTP sender is encapsulated in receive_check_set_sender(). */
4962 if ((rc = smtp_setup_msg()) > 0)
4964 if (real_sender_address != NULL &&
4965 !receive_check_set_sender(sender_address))
4967 sender_address = raw_sender = real_sender_address;
4968 sender_address_unrewritten = NULL;
4971 /* For batched SMTP, we have to run the acl_not_smtp_start ACL, since it
4972 isn't really SMTP, so no other ACL will run until the acl_not_smtp one at
4973 the very end. The result of the ACL is ignored (as for other non-SMTP
4974 messages). It is run for its potential side effects. */
4976 if (smtp_batched_input && acl_not_smtp_start != NULL)
4978 uschar *user_msg, *log_msg;
4979 enable_dollar_recipients = TRUE;
4980 (void)acl_check(ACL_WHERE_NOTSMTP_START, NULL, acl_not_smtp_start,
4981 &user_msg, &log_msg);
4982 enable_dollar_recipients = FALSE;
4985 /* Now get the data for the message */
4987 more = receive_msg(extract_recipients);
4988 if (message_id[0] == 0)
4991 smtp_log_no_mail(); /* Log no mail if configured */
4992 exim_exit(EXIT_FAILURE);
4997 smtp_log_no_mail(); /* Log no mail if configured */
4998 exim_exit((rc == 0)? EXIT_SUCCESS : EXIT_FAILURE);
5002 /* In the non-SMTP case, we have all the information from the command
5003 line, but must process it in case it is in the more general RFC822
5004 format, and in any case, to detect syntax errors. Also, it appears that
5005 the use of comma-separated lists as single arguments is common, so we
5006 had better support them. */
5012 int count = argc - recipients_arg;
5013 uschar **list = argv + recipients_arg;
5015 /* These options cannot be changed dynamically for non-SMTP messages */
5017 active_local_sender_retain = local_sender_retain;
5018 active_local_from_check = local_from_check;
5020 /* Save before any rewriting */
5022 raw_sender = string_copy(sender_address);
5024 /* Loop for each argument */
5026 for (i = 0; i < count; i++)
5028 int start, end, domain;
5030 uschar *s = list[i];
5032 /* Loop for each comma-separated address */
5036 BOOL finished = FALSE;
5038 uschar *ss = parse_find_address_end(s, FALSE);
5040 if (*ss == ',') *ss = 0; else finished = TRUE;
5042 /* Check max recipients - if -t was used, these aren't recipients */
5044 if (recipients_max > 0 && ++rcount > recipients_max &&
5045 !extract_recipients)
5047 if (error_handling == ERRORS_STDERR)
5049 fprintf(stderr, "exim: too many recipients\n");
5050 exim_exit(EXIT_FAILURE);
5055 moan_to_sender(ERRMESS_TOOMANYRECIP, NULL, NULL, stdin, TRUE)?
5056 errors_sender_rc : EXIT_FAILURE;
5061 parse_extract_address(s, &errmess, &start, &end, &domain, FALSE);
5063 if (domain == 0 && !allow_unqualified_recipient)
5066 errmess = US"unqualified recipient address not allowed";
5069 if (recipient == NULL)
5071 if (error_handling == ERRORS_STDERR)
5073 fprintf(stderr, "exim: bad recipient address \"%s\": %s\n",
5074 string_printing(list[i]), errmess);
5075 exim_exit(EXIT_FAILURE);
5081 eblock.text1 = string_printing(list[i]);
5082 eblock.text2 = errmess;
5084 moan_to_sender(ERRMESS_BADARGADDRESS, &eblock, NULL, stdin, TRUE)?
5085 errors_sender_rc : EXIT_FAILURE;
5089 receive_add_recipient(recipient, -1);
5092 while (*(++s) != 0 && (*s == ',' || isspace(*s)));
5096 /* Show the recipients when debugging */
5101 if (sender_address != NULL) debug_printf("Sender: %s\n", sender_address);
5102 if (recipients_list != NULL)
5104 debug_printf("Recipients:\n");
5105 for (i = 0; i < recipients_count; i++)
5106 debug_printf(" %s\n", recipients_list[i].address);
5110 /* Run the acl_not_smtp_start ACL if required. The result of the ACL is
5111 ignored; rejecting here would just add complication, and it can just as
5112 well be done later. Allow $recipients to be visible in the ACL. */
5114 if (acl_not_smtp_start != NULL)
5116 uschar *user_msg, *log_msg;
5117 enable_dollar_recipients = TRUE;
5118 (void)acl_check(ACL_WHERE_NOTSMTP_START, NULL, acl_not_smtp_start,
5119 &user_msg, &log_msg);
5120 enable_dollar_recipients = FALSE;
5123 /* Read the data for the message. If filter_test is not FTEST_NONE, this
5124 will just read the headers for the message, and not write anything onto the
5127 message_ended = END_NOTENDED;
5128 more = receive_msg(extract_recipients);
5130 /* more is always FALSE here (not SMTP message) when reading a message
5131 for real; when reading the headers of a message for filter testing,
5132 it is TRUE if the headers were terminated by '.' and FALSE otherwise. */
5134 if (message_id[0] == 0) exim_exit(EXIT_FAILURE);
5135 } /* Non-SMTP message reception */
5137 /* If this is a filter testing run, there are headers in store, but
5138 no message on the spool. Run the filtering code in testing mode, setting
5139 the domain to the qualify domain and the local part to the current user,
5140 unless they have been set by options. The prefix and suffix are left unset
5141 unless specified. The the return path is set to to the sender unless it has
5142 already been set from a return-path header in the message. */
5144 if (filter_test != FTEST_NONE)
5146 deliver_domain = (ftest_domain != NULL)?
5147 ftest_domain : qualify_domain_recipient;
5148 deliver_domain_orig = deliver_domain;
5149 deliver_localpart = (ftest_localpart != NULL)?
5150 ftest_localpart : originator_login;
5151 deliver_localpart_orig = deliver_localpart;
5152 deliver_localpart_prefix = ftest_prefix;
5153 deliver_localpart_suffix = ftest_suffix;
5154 deliver_home = originator_home;
5156 if (return_path == NULL)
5158 printf("Return-path copied from sender\n");
5159 return_path = string_copy(sender_address);
5163 printf("Return-path = %s\n", (return_path[0] == 0)? US"<>" : return_path);
5165 printf("Sender = %s\n", (sender_address[0] == 0)? US"<>" : sender_address);
5167 receive_add_recipient(
5168 string_sprintf("%s%s%s@%s",
5169 (ftest_prefix == NULL)? US"" : ftest_prefix,
5171 (ftest_suffix == NULL)? US"" : ftest_suffix,
5172 deliver_domain), -1);
5174 printf("Recipient = %s\n", recipients_list[0].address);
5175 if (ftest_prefix != NULL) printf("Prefix = %s\n", ftest_prefix);
5176 if (ftest_suffix != NULL) printf("Suffix = %s\n", ftest_suffix);
5178 (void)chdir("/"); /* Get away from wherever the user is running this from */
5180 /* Now we run either a system filter test, or a user filter test, or both.
5181 In the latter case, headers added by the system filter will persist and be
5182 available to the user filter. We need to copy the filter variables
5185 if ((filter_test & FTEST_SYSTEM) != 0)
5187 if (!filter_runtest(filter_sfd, filter_test_sfile, TRUE, more))
5188 exim_exit(EXIT_FAILURE);
5191 memcpy(filter_sn, filter_n, sizeof(filter_sn));
5193 if ((filter_test & FTEST_USER) != 0)
5195 if (!filter_runtest(filter_ufd, filter_test_ufile, FALSE, more))
5196 exim_exit(EXIT_FAILURE);
5199 exim_exit(EXIT_SUCCESS);
5202 /* Else act on the result of message reception. We should not get here unless
5203 message_id[0] is non-zero. If queue_only is set, session_local_queue_only
5204 will be TRUE. If it is not, check on the number of messages received in this
5207 if (!session_local_queue_only &&
5208 smtp_accept_queue_per_connection > 0 &&
5209 receive_messagecount > smtp_accept_queue_per_connection)
5211 session_local_queue_only = TRUE;
5212 queue_only_reason = 2;
5215 /* Initialize local_queue_only from session_local_queue_only. If it is false,
5216 and queue_only_load is set, check that the load average is below it. If it is
5217 not, set local_queue_only TRUE. If queue_only_load_latch is true (the
5218 default), we put the whole session into queue_only mode. It then remains this
5219 way for any subsequent messages on the same SMTP connection. This is a
5220 deliberate choice; even though the load average may fall, it doesn't seem
5221 right to deliver later messages on the same call when not delivering earlier
5222 ones. However, there are odd cases where this is not wanted, so this can be
5223 changed by setting queue_only_load_latch false. */
5225 local_queue_only = session_local_queue_only;
5226 if (!local_queue_only && queue_only_load >= 0)
5228 local_queue_only = (load_average = OS_GETLOADAVG()) > queue_only_load;
5229 if (local_queue_only)
5231 queue_only_reason = 3;
5232 if (queue_only_load_latch) session_local_queue_only = TRUE;
5236 /* If running as an MUA wrapper, all queueing options and freezing options
5240 local_queue_only = queue_only_policy = deliver_freeze = FALSE;
5242 /* Log the queueing here, when it will get a message id attached, but
5243 not if queue_only is set (case 0). Case 1 doesn't happen here (too many
5246 if (local_queue_only) switch(queue_only_reason)
5249 log_write(L_delay_delivery,
5250 LOG_MAIN, "no immediate delivery: more than %d messages "
5251 "received in one connection", smtp_accept_queue_per_connection);
5255 log_write(L_delay_delivery,
5256 LOG_MAIN, "no immediate delivery: load average %.2f",
5257 (double)load_average/1000.0);
5261 /* Else do the delivery unless the ACL or local_scan() called for queue only
5262 or froze the message. Always deliver in a separate process. A fork failure is
5263 not a disaster, as the delivery will eventually happen on a subsequent queue
5264 run. The search cache must be tidied before the fork, as the parent will
5265 do it before exiting. The child will trigger a lookup failure and
5266 thereby defer the delivery if it tries to use (for example) a cached ldap
5267 connection that the parent has called unbind on. */
5269 else if (!queue_only_policy && !deliver_freeze)
5274 if ((pid = fork()) == 0)
5277 close_unwanted(); /* Close unwanted file descriptors and TLS */
5278 exim_nullstd(); /* Ensure std{in,out,err} exist */
5280 /* Re-exec Exim if we need to regain privilege (note: in mua_wrapper
5281 mode, deliver_drop_privilege is forced TRUE). */
5283 if (geteuid() != root_uid && !deliver_drop_privilege && !unprivileged)
5285 (void)child_exec_exim(CEE_EXEC_EXIT, FALSE, NULL, FALSE, 2, US"-Mc",
5287 /* Control does not return here. */
5290 /* No need to re-exec */
5292 rc = deliver_message(message_id, FALSE, FALSE);
5294 _exit((!mua_wrapper || rc == DELIVER_MUA_SUCCEEDED)?
5295 EXIT_SUCCESS : EXIT_FAILURE);
5300 log_write(0, LOG_MAIN|LOG_PANIC, "failed to fork automatic delivery "
5301 "process: %s", strerror(errno));
5304 /* In the parent, wait if synchronous delivery is required. This will
5305 always be the case in MUA wrapper mode. */
5307 else if (synchronous_delivery)
5310 while (wait(&status) != pid);
5311 if ((status & 0x00ff) != 0)
5312 log_write(0, LOG_MAIN|LOG_PANIC,
5313 "process %d crashed with signal %d while delivering %s",
5314 (int)pid, status & 0x00ff, message_id);
5315 if (mua_wrapper && (status & 0xffff) != 0) exim_exit(EXIT_FAILURE);
5319 /* The loop will repeat if more is TRUE. If we do not know know that the OS
5320 automatically reaps children (see comments above the loop), clear away any
5321 finished subprocesses here, in case there are lots of messages coming in
5322 from the same source. */
5324 #ifndef SIG_IGN_WORKS
5325 while (waitpid(-1, NULL, WNOHANG) > 0);
5329 exim_exit(EXIT_SUCCESS); /* Never returns */
5330 return 0; /* To stop compiler warning */