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
976 # define STRINGIFY(x) #x
977 STRINGIFY(PCRE_PRERELEASE) "",
985 for (i = 0; i < lookup_list_count; i++)
987 if (lookup_list[i]->version_report)
988 lookup_list[i]->version_report(f);
991 #ifdef WHITELIST_D_MACROS
992 fprintf(f, "WHITELIST_D_MACROS: \"%s\"\n", WHITELIST_D_MACROS);
994 fprintf(f, "WHITELIST_D_MACROS unset\n");
996 #ifdef TRUSTED_CONFIG_LIST
997 fprintf(f, "TRUSTED_CONFIG_LIST: \"%s\"\n", TRUSTED_CONFIG_LIST);
999 fprintf(f, "TRUSTED_CONFIG_LIST unset\n");
1008 /*************************************************
1009 * Quote a local part *
1010 *************************************************/
1012 /* This function is used when a sender address or a From: or Sender: header
1013 line is being created from the caller's login, or from an authenticated_id. It
1014 applies appropriate quoting rules for a local part.
1016 Argument: the local part
1017 Returns: the local part, quoted if necessary
1021 local_part_quote(uschar *lpart)
1023 BOOL needs_quote = FALSE;
1028 for (t = lpart; !needs_quote && *t != 0; t++)
1030 needs_quote = !isalnum(*t) && strchr("!#$%&'*+-/=?^_`{|}~", *t) == NULL &&
1031 (*t != '.' || t == lpart || t[1] == 0);
1034 if (!needs_quote) return lpart;
1037 yield = string_cat(NULL, &size, &ptr, US"\"", 1);
1041 uschar *nq = US Ustrpbrk(lpart, "\\\"");
1044 yield = string_cat(yield, &size, &ptr, lpart, Ustrlen(lpart));
1047 yield = string_cat(yield, &size, &ptr, lpart, nq - lpart);
1048 yield = string_cat(yield, &size, &ptr, US"\\", 1);
1049 yield = string_cat(yield, &size, &ptr, nq, 1);
1053 yield = string_cat(yield, &size, &ptr, US"\"", 1);
1061 /*************************************************
1062 * Load readline() functions *
1063 *************************************************/
1065 /* This function is called from testing executions that read data from stdin,
1066 but only when running as the calling user. Currently, only -be does this. The
1067 function loads the readline() function library and passes back the functions.
1068 On some systems, it needs the curses library, so load that too, but try without
1069 it if loading fails. All this functionality has to be requested at build time.
1072 fn_readline_ptr pointer to where to put the readline pointer
1073 fn_addhist_ptr pointer to where to put the addhistory function
1075 Returns: the dlopen handle or NULL on failure
1079 set_readline(char * (**fn_readline_ptr)(const char *),
1080 void (**fn_addhist_ptr)(const char *))
1083 void *dlhandle_curses = dlopen("libcurses." DYNLIB_FN_EXT, RTLD_GLOBAL|RTLD_LAZY);
1085 dlhandle = dlopen("libreadline." DYNLIB_FN_EXT, RTLD_GLOBAL|RTLD_NOW);
1086 if (dlhandle_curses != NULL) dlclose(dlhandle_curses);
1088 if (dlhandle != NULL)
1090 /* Checked manual pages; at least in GNU Readline 6.1, the prototypes are:
1091 * char * readline (const char *prompt);
1092 * void add_history (const char *string);
1094 *fn_readline_ptr = (char *(*)(const char*))dlsym(dlhandle, "readline");
1095 *fn_addhist_ptr = (void(*)(const char*))dlsym(dlhandle, "add_history");
1099 DEBUG(D_any) debug_printf("failed to load readline: %s\n", dlerror());
1108 /*************************************************
1109 * Get a line from stdin for testing things *
1110 *************************************************/
1112 /* This function is called when running tests that can take a number of lines
1113 of input (for example, -be and -bt). It handles continuations and trailing
1114 spaces. And prompting and a blank line output on eof. If readline() is in use,
1115 the arguments are non-NULL and provide the relevant functions.
1118 fn_readline readline function or NULL
1119 fn_addhist addhist function or NULL
1121 Returns: pointer to dynamic memory, or NULL at end of file
1125 get_stdinput(char *(*fn_readline)(const char *), void(*fn_addhist)(const char *))
1130 uschar *yield = NULL;
1132 if (fn_readline == NULL) { printf("> "); fflush(stdout); }
1136 uschar buffer[1024];
1140 char *readline_line = NULL;
1141 if (fn_readline != NULL)
1143 if ((readline_line = fn_readline((i > 0)? "":"> ")) == NULL) break;
1144 if (*readline_line != 0 && fn_addhist != NULL) fn_addhist(readline_line);
1145 p = US readline_line;
1150 /* readline() not in use */
1153 if (Ufgets(buffer, sizeof(buffer), stdin) == NULL) break;
1157 /* Handle the line */
1159 ss = p + (int)Ustrlen(p);
1160 while (ss > p && isspace(ss[-1])) ss--;
1164 while (p < ss && isspace(*p)) p++; /* leading space after cont */
1167 yield = string_cat(yield, &size, &ptr, p, ss - p);
1170 if (fn_readline != NULL) free(readline_line);
1173 if (ss == p || yield[ptr-1] != '\\')
1181 if (yield == NULL) printf("\n");
1187 /*************************************************
1188 * Output usage information for the program *
1189 *************************************************/
1191 /* This function is called when there are no recipients
1192 or a specific --help argument was added.
1195 progname information on what name we were called by
1197 Returns: DOES NOT RETURN
1201 exim_usage(uschar *progname)
1204 /* Handle specific program invocation varients */
1205 if (Ustrcmp(progname, US"-mailq") == 0)
1208 "mailq - list the contents of the mail queue\n\n"
1209 "For a list of options, see the Exim documentation.\n");
1213 /* Generic usage - we output this whatever happens */
1215 "Exim is a Mail Transfer Agent. It is normally called by Mail User Agents,\n"
1216 "not directly from a shell command line. Options and/or arguments control\n"
1217 "what it does when called. For a list of options, see the Exim documentation.\n");
1224 /*************************************************
1225 * Validate that the macros given are okay *
1226 *************************************************/
1228 /* Typically, Exim will drop privileges if macros are supplied. In some
1229 cases, we want to not do so.
1231 Arguments: none (macros is a global)
1232 Returns: true if trusted, false otherwise
1236 macros_trusted(void)
1238 #ifdef WHITELIST_D_MACROS
1240 uschar *whitelisted, *end, *p, **whites, **w;
1241 int white_count, i, n;
1243 BOOL prev_char_item, found;
1248 #ifndef WHITELIST_D_MACROS
1252 /* We only trust -D overrides for some invoking users:
1253 root, the exim run-time user, the optional config owner user.
1254 I don't know why config-owner would be needed, but since they can own the
1255 config files anyway, there's no security risk to letting them override -D. */
1256 if ( ! ((real_uid == root_uid)
1257 || (real_uid == exim_uid)
1258 #ifdef CONFIGURE_OWNER
1259 || (real_uid == config_uid)
1263 debug_printf("macros_trusted rejecting macros for uid %d\n", (int) real_uid);
1267 /* Get a list of macros which are whitelisted */
1268 whitelisted = string_copy_malloc(US WHITELIST_D_MACROS);
1269 prev_char_item = FALSE;
1271 for (p = whitelisted; *p != '\0'; ++p)
1273 if (*p == ':' || isspace(*p))
1278 prev_char_item = FALSE;
1281 if (!prev_char_item)
1282 prev_char_item = TRUE;
1289 whites = store_malloc(sizeof(uschar *) * (white_count+1));
1290 for (p = whitelisted, i = 0; (p != end) && (i < white_count); ++p)
1295 if (i == white_count)
1297 while (*p != '\0' && p < end)
1303 /* The list of macros should be very short. Accept the N*M complexity. */
1304 for (m = macros; m != NULL; m = m->next)
1307 for (w = whites; *w; ++w)
1308 if (Ustrcmp(*w, m->name) == 0)
1315 if (m->replacement == NULL)
1317 len = Ustrlen(m->replacement);
1320 n = pcre_exec(regex_whitelisted_macro, NULL, CS m->replacement, len,
1321 0, PCRE_EOPT, NULL, 0);
1324 if (n != PCRE_ERROR_NOMATCH)
1325 debug_printf("macros_trusted checking %s returned %d\n", m->name, n);
1329 DEBUG(D_any) debug_printf("macros_trusted overridden to true by whitelisting\n");
1335 /*************************************************
1336 * Entry point and high-level code *
1337 *************************************************/
1339 /* Entry point for the Exim mailer. Analyse the arguments and arrange to take
1340 the appropriate action. All the necessary functions are present in the one
1341 binary. I originally thought one should split it up, but it turns out that so
1342 much of the apparatus is needed in each chunk that one might as well just have
1343 it all available all the time, which then makes the coding easier as well.
1346 argc count of entries in argv
1347 argv argument strings, with argv[0] being the program name
1349 Returns: EXIT_SUCCESS if terminated successfully
1350 EXIT_FAILURE otherwise, except when a message has been sent
1351 to the sender, and -oee was given
1355 main(int argc, char **cargv)
1357 uschar **argv = USS cargv;
1358 int arg_receive_timeout = -1;
1359 int arg_smtp_receive_timeout = -1;
1360 int arg_error_handling = error_handling;
1361 int filter_sfd = -1;
1362 int filter_ufd = -1;
1365 int list_queue_option = 0;
1367 int msg_action_arg = -1;
1368 int namelen = (argv[0] == NULL)? 0 : Ustrlen(argv[0]);
1369 int queue_only_reason = 0;
1371 int perl_start_option = 0;
1373 int recipients_arg = argc;
1374 int sender_address_domain = 0;
1375 int test_retry_arg = -1;
1376 int test_rewrite_arg = -1;
1377 BOOL arg_queue_only = FALSE;
1378 BOOL bi_option = FALSE;
1379 BOOL checking = FALSE;
1380 BOOL count_queue = FALSE;
1381 BOOL expansion_test = FALSE;
1382 BOOL extract_recipients = FALSE;
1383 BOOL forced_delivery = FALSE;
1384 BOOL f_end_dot = FALSE;
1385 BOOL deliver_give_up = FALSE;
1386 BOOL list_queue = FALSE;
1387 BOOL list_options = FALSE;
1388 BOOL local_queue_only;
1390 BOOL one_msg_action = FALSE;
1391 BOOL queue_only_set = FALSE;
1392 BOOL receiving_message = TRUE;
1393 BOOL sender_ident_set = FALSE;
1394 BOOL session_local_queue_only;
1396 BOOL removed_privilege = FALSE;
1397 BOOL usage_wanted = FALSE;
1398 BOOL verify_address_mode = FALSE;
1399 BOOL verify_as_sender = FALSE;
1400 BOOL version_printed = FALSE;
1401 uschar *alias_arg = NULL;
1402 uschar *called_as = US"";
1403 uschar *start_queue_run_id = NULL;
1404 uschar *stop_queue_run_id = NULL;
1405 uschar *expansion_test_message = NULL;
1406 uschar *ftest_domain = NULL;
1407 uschar *ftest_localpart = NULL;
1408 uschar *ftest_prefix = NULL;
1409 uschar *ftest_suffix = NULL;
1410 uschar *malware_test_file = NULL;
1411 uschar *real_sender_address;
1412 uschar *originator_home = US"/";
1416 struct stat statbuf;
1417 pid_t passed_qr_pid = (pid_t)0;
1418 int passed_qr_pipe = -1;
1419 gid_t group_list[NGROUPS_MAX];
1421 /* Possible options for -R and -S */
1423 static uschar *rsopts[] = { US"f", US"ff", US"r", US"rf", US"rff" };
1425 /* Need to define this in case we need to change the environment in order
1426 to get rid of a bogus time zone. We have to make it char rather than uschar
1427 because some OS define it in /usr/include/unistd.h. */
1429 extern char **environ;
1431 /* If the Exim user and/or group and/or the configuration file owner/group were
1432 defined by ref:name at build time, we must now find the actual uid/gid values.
1433 This is a feature to make the lives of binary distributors easier. */
1435 #ifdef EXIM_USERNAME
1436 if (route_finduser(US EXIM_USERNAME, &pw, &exim_uid))
1440 fprintf(stderr, "exim: refusing to run with uid 0 for \"%s\"\n",
1444 /* If ref:name uses a number as the name, route_finduser() returns
1445 TRUE with exim_uid set and pw coerced to NULL. */
1447 exim_gid = pw->pw_gid;
1448 #ifndef EXIM_GROUPNAME
1452 "exim: ref:name should specify a usercode, not a group.\n"
1453 "exim: can't let you get away with it unless you also specify a group.\n");
1460 fprintf(stderr, "exim: failed to find uid for user name \"%s\"\n",
1466 #ifdef EXIM_GROUPNAME
1467 if (!route_findgroup(US EXIM_GROUPNAME, &exim_gid))
1469 fprintf(stderr, "exim: failed to find gid for group name \"%s\"\n",
1475 #ifdef CONFIGURE_OWNERNAME
1476 if (!route_finduser(US CONFIGURE_OWNERNAME, NULL, &config_uid))
1478 fprintf(stderr, "exim: failed to find uid for user name \"%s\"\n",
1479 CONFIGURE_OWNERNAME);
1484 /* We default the system_filter_user to be the Exim run-time user, as a
1485 sane non-root value. */
1486 system_filter_uid = exim_uid;
1488 #ifdef CONFIGURE_GROUPNAME
1489 if (!route_findgroup(US CONFIGURE_GROUPNAME, &config_gid))
1491 fprintf(stderr, "exim: failed to find gid for group name \"%s\"\n",
1492 CONFIGURE_GROUPNAME);
1497 /* In the Cygwin environment, some initialization needs doing. It is fudged
1498 in by means of this macro. */
1504 /* Check a field which is patched when we are running Exim within its
1505 testing harness; do a fast initial check, and then the whole thing. */
1507 running_in_test_harness =
1508 *running_status == '<' && Ustrcmp(running_status, "<<<testing>>>") == 0;
1510 /* The C standard says that the equivalent of setlocale(LC_ALL, "C") is obeyed
1511 at the start of a program; however, it seems that some environments do not
1512 follow this. A "strange" locale can affect the formatting of timestamps, so we
1515 setlocale(LC_ALL, "C");
1517 /* Set up the default handler for timing using alarm(). */
1519 os_non_restarting_signal(SIGALRM, sigalrm_handler);
1521 /* Ensure we have a buffer for constructing log entries. Use malloc directly,
1522 because store_malloc writes a log entry on failure. */
1524 log_buffer = (uschar *)malloc(LOG_BUFFER_SIZE);
1525 if (log_buffer == NULL)
1527 fprintf(stderr, "exim: failed to get store for log buffer\n");
1531 /* Set log_stderr to stderr, provided that stderr exists. This gets reset to
1532 NULL when the daemon is run and the file is closed. We have to use this
1533 indirection, because some systems don't allow writing to the variable "stderr".
1536 if (fstat(fileno(stderr), &statbuf) >= 0) log_stderr = stderr;
1538 /* Arrange for the PCRE regex library to use our store functions. Note that
1539 the normal calls are actually macros that add additional arguments for
1540 debugging purposes so we have to assign specially constructed functions here.
1541 The default is to use store in the stacking pool, but this is overridden in the
1542 regex_must_compile() function. */
1544 pcre_malloc = function_store_get;
1545 pcre_free = function_dummy_free;
1547 /* Ensure there is a big buffer for temporary use in several places. It is put
1548 in malloc store so that it can be freed for enlargement if necessary. */
1550 big_buffer = store_malloc(big_buffer_size);
1552 /* Set up the handler for the data request signal, and set the initial
1553 descriptive text. */
1555 set_process_info("initializing");
1556 os_restarting_signal(SIGUSR1, usr1_handler);
1558 /* SIGHUP is used to get the daemon to reconfigure. It gets set as appropriate
1559 in the daemon code. For the rest of Exim's uses, we ignore it. */
1561 signal(SIGHUP, SIG_IGN);
1563 /* We don't want to die on pipe errors as the code is written to handle
1564 the write error instead. */
1566 signal(SIGPIPE, SIG_IGN);
1568 /* Under some circumstance on some OS, Exim can get called with SIGCHLD
1569 set to SIG_IGN. This causes subprocesses that complete before the parent
1570 process waits for them not to hang around, so when Exim calls wait(), nothing
1571 is there. The wait() code has been made robust against this, but let's ensure
1572 that SIGCHLD is set to SIG_DFL, because it's tidier to wait and get a process
1573 ending status. We use sigaction rather than plain signal() on those OS where
1574 SA_NOCLDWAIT exists, because we want to be sure it is turned off. (There was a
1575 problem on AIX with this.) */
1579 struct sigaction act;
1580 act.sa_handler = SIG_DFL;
1581 sigemptyset(&(act.sa_mask));
1583 sigaction(SIGCHLD, &act, NULL);
1586 signal(SIGCHLD, SIG_DFL);
1589 /* Save the arguments for use if we re-exec exim as a daemon after receiving
1594 /* Set up the version number. Set up the leading 'E' for the external form of
1595 message ids, set the pointer to the internal form, and initialize it to
1596 indicate no message being processed. */
1599 message_id_option[0] = '-';
1600 message_id_external = message_id_option + 1;
1601 message_id_external[0] = 'E';
1602 message_id = message_id_external + 1;
1605 /* Set the umask to zero so that any files Exim creates using open() are
1606 created with the modes that it specifies. NOTE: Files created with fopen() have
1607 a problem, which was not recognized till rather late (February 2006). With this
1608 umask, such files will be world writeable. (They are all content scanning files
1609 in the spool directory, which isn't world-accessible, so this is not a
1610 disaster, but it's untidy.) I don't want to change this overall setting,
1611 however, because it will interact badly with the open() calls. Instead, there's
1612 now a function called modefopen() that fiddles with the umask while calling
1617 /* Precompile the regular expression for matching a message id. Keep this in
1618 step with the code that generates ids in the accept.c module. We need to do
1619 this here, because the -M options check their arguments for syntactic validity
1620 using mac_ismsgid, which uses this. */
1623 regex_must_compile(US"^(?:[^\\W_]{6}-){2}[^\\W_]{2}$", FALSE, TRUE);
1625 /* Precompile the regular expression that is used for matching an SMTP error
1626 code, possibly extended, at the start of an error message. Note that the
1627 terminating whitespace character is included. */
1630 regex_must_compile(US"^\\d\\d\\d\\s(?:\\d\\.\\d\\d?\\d?\\.\\d\\d?\\d?\\s)?",
1633 #ifdef WHITELIST_D_MACROS
1634 /* Precompile the regular expression used to filter the content of macros
1635 given to -D for permissibility. */
1637 regex_whitelisted_macro =
1638 regex_must_compile(US"^[A-Za-z0-9_/.-]*$", FALSE, TRUE);
1642 /* If the program is called as "mailq" treat it as equivalent to "exim -bp";
1643 this seems to be a generally accepted convention, since one finds symbolic
1644 links called "mailq" in standard OS configurations. */
1646 if ((namelen == 5 && Ustrcmp(argv[0], "mailq") == 0) ||
1647 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/mailq", 6) == 0))
1650 receiving_message = FALSE;
1651 called_as = US"-mailq";
1654 /* If the program is called as "rmail" treat it as equivalent to
1655 "exim -i -oee", thus allowing UUCP messages to be input using non-SMTP mode,
1656 i.e. preventing a single dot on a line from terminating the message, and
1657 returning with zero return code, even in cases of error (provided an error
1658 message has been sent). */
1660 if ((namelen == 5 && Ustrcmp(argv[0], "rmail") == 0) ||
1661 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/rmail", 6) == 0))
1664 called_as = US"-rmail";
1665 errors_sender_rc = EXIT_SUCCESS;
1668 /* If the program is called as "rsmtp" treat it as equivalent to "exim -bS";
1669 this is a smail convention. */
1671 if ((namelen == 5 && Ustrcmp(argv[0], "rsmtp") == 0) ||
1672 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/rsmtp", 6) == 0))
1674 smtp_input = smtp_batched_input = TRUE;
1675 called_as = US"-rsmtp";
1678 /* If the program is called as "runq" treat it as equivalent to "exim -q";
1679 this is a smail convention. */
1681 if ((namelen == 4 && Ustrcmp(argv[0], "runq") == 0) ||
1682 (namelen > 4 && Ustrncmp(argv[0] + namelen - 5, "/runq", 5) == 0))
1685 receiving_message = FALSE;
1686 called_as = US"-runq";
1689 /* If the program is called as "newaliases" treat it as equivalent to
1690 "exim -bi"; this is a sendmail convention. */
1692 if ((namelen == 10 && Ustrcmp(argv[0], "newaliases") == 0) ||
1693 (namelen > 10 && Ustrncmp(argv[0] + namelen - 11, "/newaliases", 11) == 0))
1696 receiving_message = FALSE;
1697 called_as = US"-newaliases";
1700 /* Save the original effective uid for a couple of uses later. It should
1701 normally be root, but in some esoteric environments it may not be. */
1703 original_euid = geteuid();
1705 /* Get the real uid and gid. If the caller is root, force the effective uid/gid
1706 to be the same as the real ones. This makes a difference only if Exim is setuid
1707 (or setgid) to something other than root, which could be the case in some
1708 special configurations. */
1710 real_uid = getuid();
1711 real_gid = getgid();
1713 if (real_uid == root_uid)
1715 rv = setgid(real_gid);
1718 fprintf(stderr, "exim: setgid(%ld) failed: %s\n",
1719 (long int)real_gid, strerror(errno));
1722 rv = setuid(real_uid);
1725 fprintf(stderr, "exim: setuid(%ld) failed: %s\n",
1726 (long int)real_uid, strerror(errno));
1731 /* If neither the original real uid nor the original euid was root, Exim is
1732 running in an unprivileged state. */
1734 unprivileged = (real_uid != root_uid && original_euid != root_uid);
1736 /* Scan the program's arguments. Some can be dealt with right away; others are
1737 simply recorded for checking and handling afterwards. Do a high-level switch
1738 on the second character (the one after '-'), to save some effort. */
1740 for (i = 1; i < argc; i++)
1742 BOOL badarg = FALSE;
1743 uschar *arg = argv[i];
1747 /* An argument not starting with '-' is the start of a recipients list;
1748 break out of the options-scanning loop. */
1756 /* An option consistion of -- terminates the options */
1758 if (Ustrcmp(arg, "--") == 0)
1760 recipients_arg = i + 1;
1764 /* Handle flagged options */
1766 switchchar = arg[1];
1769 /* Make all -ex options synonymous with -oex arguments, since that
1770 is assumed by various callers. Also make -qR options synonymous with -R
1771 options, as that seems to be required as well. Allow for -qqR too, and
1772 the same for -S options. */
1774 if (Ustrncmp(arg+1, "oe", 2) == 0 ||
1775 Ustrncmp(arg+1, "qR", 2) == 0 ||
1776 Ustrncmp(arg+1, "qS", 2) == 0)
1778 switchchar = arg[2];
1781 else if (Ustrncmp(arg+1, "qqR", 3) == 0 || Ustrncmp(arg+1, "qqS", 3) == 0)
1783 switchchar = arg[3];
1785 queue_2stage = TRUE;
1788 /* Make -r synonymous with -f, since it is a documented alias */
1790 else if (arg[1] == 'r') switchchar = 'f';
1792 /* Make -ov synonymous with -v */
1794 else if (Ustrcmp(arg, "-ov") == 0)
1800 /* deal with --option_aliases */
1801 else if (switchchar == '-')
1803 if (Ustrcmp(argrest, "help") == 0)
1805 usage_wanted = TRUE;
1808 else if (Ustrcmp(argrest, "version") == 0)
1815 /* High-level switch on active initial letter */
1819 /* -Btype is a sendmail option for 7bit/8bit setting. Exim is 8-bit clean
1820 so has no need of it. */
1823 if (*argrest == 0) i++; /* Skip over the type */
1828 receiving_message = FALSE; /* Reset TRUE for -bm, -bS, -bs below */
1830 /* -bd: Run in daemon mode, awaiting SMTP connections.
1831 -bdf: Ditto, but in the foreground.
1834 if (*argrest == 'd')
1836 daemon_listen = TRUE;
1837 if (*(++argrest) == 'f') background_daemon = FALSE;
1838 else if (*argrest != 0) { badarg = TRUE; break; }
1841 /* -be: Run in expansion test mode
1842 -bem: Ditto, but read a message from a file first
1845 else if (*argrest == 'e')
1847 expansion_test = checking = TRUE;
1848 if (argrest[1] == 'm')
1850 if (++i >= argc) { badarg = TRUE; break; }
1851 expansion_test_message = argv[i];
1854 if (argrest[1] != 0) { badarg = TRUE; break; }
1857 /* -bF: Run system filter test */
1859 else if (*argrest == 'F')
1861 filter_test |= FTEST_SYSTEM;
1862 if (*(++argrest) != 0) { badarg = TRUE; break; }
1863 if (++i < argc) filter_test_sfile = argv[i]; else
1865 fprintf(stderr, "exim: file name expected after %s\n", argv[i-1]);
1870 /* -bf: Run user filter test
1871 -bfd: Set domain for filter testing
1872 -bfl: Set local part for filter testing
1873 -bfp: Set prefix for filter testing
1874 -bfs: Set suffix for filter testing
1877 else if (*argrest == 'f')
1879 if (*(++argrest) == 0)
1881 filter_test |= FTEST_USER;
1882 if (++i < argc) filter_test_ufile = argv[i]; else
1884 fprintf(stderr, "exim: file name expected after %s\n", argv[i-1]);
1892 fprintf(stderr, "exim: string expected after %s\n", arg);
1895 if (Ustrcmp(argrest, "d") == 0) ftest_domain = argv[i];
1896 else if (Ustrcmp(argrest, "l") == 0) ftest_localpart = argv[i];
1897 else if (Ustrcmp(argrest, "p") == 0) ftest_prefix = argv[i];
1898 else if (Ustrcmp(argrest, "s") == 0) ftest_suffix = argv[i];
1899 else { badarg = TRUE; break; }
1903 /* -bh: Host checking - an IP address must follow. */
1905 else if (Ustrcmp(argrest, "h") == 0 || Ustrcmp(argrest, "hc") == 0)
1907 if (++i >= argc) { badarg = TRUE; break; }
1908 sender_host_address = argv[i];
1909 host_checking = checking = log_testing_mode = TRUE;
1910 host_checking_callout = argrest[1] == 'c';
1913 /* -bi: This option is used by sendmail to initialize *the* alias file,
1914 though it has the -oA option to specify a different file. Exim has no
1915 concept of *the* alias file, but since Sun's YP make script calls
1916 sendmail this way, some support must be provided. */
1918 else if (Ustrcmp(argrest, "i") == 0) bi_option = TRUE;
1920 /* -bm: Accept and deliver message - the default option. Reinstate
1921 receiving_message, which got turned off for all -b options. */
1923 else if (Ustrcmp(argrest, "m") == 0) receiving_message = TRUE;
1925 /* -bmalware: test the filename given for malware */
1927 else if (Ustrcmp(argrest, "malware") == 0)
1929 if (++i >= argc) { badarg = TRUE; break; }
1930 malware_test_file = argv[i];
1933 /* -bnq: For locally originating messages, do not qualify unqualified
1934 addresses. In the envelope, this causes errors; in header lines they
1937 else if (Ustrcmp(argrest, "nq") == 0)
1939 allow_unqualified_sender = FALSE;
1940 allow_unqualified_recipient = FALSE;
1943 /* -bpxx: List the contents of the mail queue, in various forms. If
1944 the option is -bpc, just a queue count is needed. Otherwise, if the
1945 first letter after p is r, then order is random. */
1947 else if (*argrest == 'p')
1949 if (*(++argrest) == 'c')
1952 if (*(++argrest) != 0) badarg = TRUE;
1956 if (*argrest == 'r')
1958 list_queue_option = 8;
1961 else list_queue_option = 0;
1965 /* -bp: List the contents of the mail queue, top-level only */
1967 if (*argrest == 0) {}
1969 /* -bpu: List the contents of the mail queue, top-level undelivered */
1971 else if (Ustrcmp(argrest, "u") == 0) list_queue_option += 1;
1973 /* -bpa: List the contents of the mail queue, including all delivered */
1975 else if (Ustrcmp(argrest, "a") == 0) list_queue_option += 2;
1977 /* Unknown after -bp[r] */
1987 /* -bP: List the configuration variables given as the address list.
1988 Force -v, so configuration errors get displayed. */
1990 else if (Ustrcmp(argrest, "P") == 0)
1992 list_options = TRUE;
1993 debug_selector |= D_v;
1994 debug_file = stderr;
1997 /* -brt: Test retry configuration lookup */
1999 else if (Ustrcmp(argrest, "rt") == 0)
2001 test_retry_arg = i + 1;
2005 /* -brw: Test rewrite configuration */
2007 else if (Ustrcmp(argrest, "rw") == 0)
2009 test_rewrite_arg = i + 1;
2013 /* -bS: Read SMTP commands on standard input, but produce no replies -
2014 all errors are reported by sending messages. */
2016 else if (Ustrcmp(argrest, "S") == 0)
2017 smtp_input = smtp_batched_input = receiving_message = TRUE;
2019 /* -bs: Read SMTP commands on standard input and produce SMTP replies
2020 on standard output. */
2022 else if (Ustrcmp(argrest, "s") == 0) smtp_input = receiving_message = TRUE;
2024 /* -bt: address testing mode */
2026 else if (Ustrcmp(argrest, "t") == 0)
2027 address_test_mode = checking = log_testing_mode = TRUE;
2029 /* -bv: verify addresses */
2031 else if (Ustrcmp(argrest, "v") == 0)
2032 verify_address_mode = checking = log_testing_mode = TRUE;
2034 /* -bvs: verify sender addresses */
2036 else if (Ustrcmp(argrest, "vs") == 0)
2038 verify_address_mode = checking = log_testing_mode = TRUE;
2039 verify_as_sender = TRUE;
2042 /* -bV: Print version string and support details */
2044 else if (Ustrcmp(argrest, "V") == 0)
2046 printf("Exim version %s #%s built %s\n", version_string,
2047 version_cnumber, version_date);
2048 printf("%s\n", CS version_copyright);
2049 version_printed = TRUE;
2050 show_whats_supported(stdout);
2057 /* -C: change configuration file list; ignore if it isn't really
2058 a change! Enforce a prefix check if required. */
2063 if(++i < argc) argrest = argv[i]; else
2064 { badarg = TRUE; break; }
2066 if (Ustrcmp(config_main_filelist, argrest) != 0)
2068 #ifdef ALT_CONFIG_PREFIX
2070 int len = Ustrlen(ALT_CONFIG_PREFIX);
2071 uschar *list = argrest;
2073 while((filename = string_nextinlist(&list, &sep, big_buffer,
2074 big_buffer_size)) != NULL)
2076 if ((Ustrlen(filename) < len ||
2077 Ustrncmp(filename, ALT_CONFIG_PREFIX, len) != 0 ||
2078 Ustrstr(filename, "/../") != NULL) &&
2079 (Ustrcmp(filename, "/dev/null") != 0 || real_uid != root_uid))
2081 fprintf(stderr, "-C Permission denied\n");
2086 if (real_uid != root_uid)
2088 #ifdef TRUSTED_CONFIG_LIST
2090 if (real_uid != exim_uid
2091 #ifdef CONFIGURE_OWNER
2092 && real_uid != config_uid
2095 trusted_config = FALSE;
2098 FILE *trust_list = Ufopen(TRUSTED_CONFIG_LIST, "rb");
2101 struct stat statbuf;
2103 if (fstat(fileno(trust_list), &statbuf) != 0 ||
2104 (statbuf.st_uid != root_uid /* owner not root */
2105 #ifdef CONFIGURE_OWNER
2106 && statbuf.st_uid != config_uid /* owner not the special one */
2109 (statbuf.st_gid != root_gid /* group not root */
2110 #ifdef CONFIGURE_GROUP
2111 && statbuf.st_gid != config_gid /* group not the special one */
2113 && (statbuf.st_mode & 020) != 0 /* group writeable */
2115 (statbuf.st_mode & 2) != 0) /* world writeable */
2117 trusted_config = FALSE;
2122 /* Well, the trust list at least is up to scratch... */
2123 void *reset_point = store_get(0);
2124 uschar *trusted_configs[32];
2128 while (Ufgets(big_buffer, big_buffer_size, trust_list))
2130 uschar *start = big_buffer, *nl;
2131 while (*start && isspace(*start))
2135 nl = Ustrchr(start, '\n');
2138 trusted_configs[nr_configs++] = string_copy(start);
2139 if (nr_configs == 32)
2147 uschar *list = argrest;
2149 while (trusted_config && (filename = string_nextinlist(&list,
2150 &sep, big_buffer, big_buffer_size)) != NULL)
2152 for (i=0; i < nr_configs; i++)
2154 if (Ustrcmp(filename, trusted_configs[i]) == 0)
2157 if (i == nr_configs)
2159 trusted_config = FALSE;
2163 store_reset(reset_point);
2167 /* No valid prefixes found in trust_list file. */
2168 trusted_config = FALSE;
2174 /* Could not open trust_list file. */
2175 trusted_config = FALSE;
2179 /* Not root; don't trust config */
2180 trusted_config = FALSE;
2184 config_main_filelist = argrest;
2185 config_changed = TRUE;
2190 /* -D: set up a macro definition */
2193 #ifdef DISABLE_D_OPTION
2194 fprintf(stderr, "exim: -D is not available in this Exim binary\n");
2199 macro_item *mlast = NULL;
2202 uschar *s = argrest;
2204 while (isspace(*s)) s++;
2206 if (*s < 'A' || *s > 'Z')
2208 fprintf(stderr, "exim: macro name set by -D must start with "
2209 "an upper case letter\n");
2213 while (isalnum(*s) || *s == '_')
2215 if (ptr < sizeof(name)-1) name[ptr++] = *s;
2219 if (ptr == 0) { badarg = TRUE; break; }
2220 while (isspace(*s)) s++;
2223 if (*s++ != '=') { badarg = TRUE; break; }
2224 while (isspace(*s)) s++;
2227 for (m = macros; m != NULL; m = m->next)
2229 if (Ustrcmp(m->name, name) == 0)
2231 fprintf(stderr, "exim: duplicated -D in command line\n");
2237 m = store_get(sizeof(macro_item) + Ustrlen(name));
2239 m->command_line = TRUE;
2240 if (mlast == NULL) macros = m; else mlast->next = m;
2241 Ustrcpy(m->name, name);
2242 m->replacement = string_copy(s);
2244 if (clmacro_count >= MAX_CLMACROS)
2246 fprintf(stderr, "exim: too many -D options on command line\n");
2249 clmacros[clmacro_count++] = string_sprintf("-D%s=%s", m->name,
2255 /* -d: Set debug level (see also -v below) or set the drop_cr option.
2256 The latter is now a no-op, retained for compatibility only. If -dd is used,
2257 debugging subprocesses of the daemon is disabled. */
2260 if (Ustrcmp(argrest, "ropcr") == 0)
2262 /* drop_cr = TRUE; */
2265 /* Use an intermediate variable so that we don't set debugging while
2266 decoding the debugging bits. */
2270 unsigned int selector = D_default;
2273 if (*argrest == 'd')
2275 debug_daemon = TRUE;
2279 decode_bits(&selector, NULL, D_memory, 0, argrest, debug_options,
2280 debug_options_count, US"debug", 0);
2281 debug_selector = selector;
2286 /* -E: This is a local error message. This option is not intended for
2287 external use at all, but is not restricted to trusted callers because it
2288 does no harm (just suppresses certain error messages) and if Exim is run
2289 not setuid root it won't always be trusted when it generates error
2290 messages using this option. If there is a message id following -E, point
2291 message_reference at it, for logging. */
2294 local_error_message = TRUE;
2295 if (mac_ismsgid(argrest)) message_reference = argrest;
2299 /* -ex: The vacation program calls sendmail with the undocumented "-eq"
2300 option, so it looks as if historically the -oex options are also callable
2301 without the leading -o. So we have to accept them. Before the switch,
2302 anything starting -oe has been converted to -e. Exim does not support all
2303 of the sendmail error options. */
2306 if (Ustrcmp(argrest, "e") == 0)
2308 arg_error_handling = ERRORS_SENDER;
2309 errors_sender_rc = EXIT_SUCCESS;
2311 else if (Ustrcmp(argrest, "m") == 0) arg_error_handling = ERRORS_SENDER;
2312 else if (Ustrcmp(argrest, "p") == 0) arg_error_handling = ERRORS_STDERR;
2313 else if (Ustrcmp(argrest, "q") == 0) arg_error_handling = ERRORS_STDERR;
2314 else if (Ustrcmp(argrest, "w") == 0) arg_error_handling = ERRORS_SENDER;
2319 /* -F: Set sender's full name, used instead of the gecos entry from
2320 the password file. Since users can usually alter their gecos entries,
2321 there's no security involved in using this instead. The data can follow
2322 the -F or be in the next argument. */
2327 if(++i < argc) argrest = argv[i]; else
2328 { badarg = TRUE; break; }
2330 originator_name = argrest;
2331 sender_name_forced = TRUE;
2335 /* -f: Set sender's address - this value is only actually used if Exim is
2336 run by a trusted user, or if untrusted_set_sender is set and matches the
2337 address, except that the null address can always be set by any user. The
2338 test for this happens later, when the value given here is ignored when not
2339 permitted. For an untrusted user, the actual sender is still put in Sender:
2340 if it doesn't match the From: header (unless no_local_from_check is set).
2341 The data can follow the -f or be in the next argument. The -r switch is an
2342 obsolete form of -f but since there appear to be programs out there that
2343 use anything that sendmail has ever supported, better accept it - the
2344 synonymizing is done before the switch above.
2346 At this stage, we must allow domain literal addresses, because we don't
2347 know what the setting of allow_domain_literals is yet. Ditto for trailing
2348 dots and strip_trailing_dot. */
2356 if (i+1 < argc) argrest = argv[++i]; else
2357 { badarg = TRUE; break; }
2361 sender_address = string_sprintf(""); /* Ensure writeable memory */
2365 uschar *temp = argrest + Ustrlen(argrest) - 1;
2366 while (temp >= argrest && isspace(*temp)) temp--;
2367 if (temp >= argrest && *temp == '.') f_end_dot = TRUE;
2368 allow_domain_literals = TRUE;
2369 strip_trailing_dot = TRUE;
2370 sender_address = parse_extract_address(argrest, &errmess, &start, &end,
2371 &sender_address_domain, TRUE);
2372 allow_domain_literals = FALSE;
2373 strip_trailing_dot = FALSE;
2374 if (sender_address == NULL)
2376 fprintf(stderr, "exim: bad -f address \"%s\": %s\n", argrest, errmess);
2377 return EXIT_FAILURE;
2380 sender_address_forced = TRUE;
2384 /* This is some Sendmail thing which can be ignored */
2389 /* -h: Set the hop count for an incoming message. Exim does not currently
2390 support this; it always computes it by counting the Received: headers.
2391 To put it in will require a change to the spool header file format. */
2396 if(++i < argc) argrest = argv[i]; else
2397 { badarg = TRUE; break; }
2399 if (!isdigit(*argrest)) badarg = TRUE;
2403 /* -i: Set flag so dot doesn't end non-SMTP input (same as -oi, seems
2404 not to be documented for sendmail but mailx (at least) uses it) */
2407 if (*argrest == 0) dot_ends = FALSE; else badarg = TRUE;
2412 receiving_message = FALSE;
2414 /* -MC: continue delivery of another message via an existing open
2415 file descriptor. This option is used for an internal call by the
2416 smtp transport when there is a pending message waiting to go to an
2417 address to which it has got a connection. Five subsequent arguments are
2418 required: transport name, host name, IP address, sequence number, and
2419 message_id. Transports may decline to create new processes if the sequence
2420 number gets too big. The channel is stdin. This (-MC) must be the last
2421 argument. There's a subsequent check that the real-uid is privileged.
2423 If we are running in the test harness. delay for a bit, to let the process
2424 that set this one up complete. This makes for repeatability of the logging,
2427 if (Ustrcmp(argrest, "C") == 0)
2429 union sockaddr_46 interface_sock;
2430 EXIM_SOCKLEN_T size = sizeof(interface_sock);
2434 fprintf(stderr, "exim: too many or too few arguments after -MC\n");
2435 return EXIT_FAILURE;
2438 if (msg_action_arg >= 0)
2440 fprintf(stderr, "exim: incompatible arguments\n");
2441 return EXIT_FAILURE;
2444 continue_transport = argv[++i];
2445 continue_hostname = argv[++i];
2446 continue_host_address = argv[++i];
2447 continue_sequence = Uatoi(argv[++i]);
2448 msg_action = MSG_DELIVER;
2449 msg_action_arg = ++i;
2450 forced_delivery = TRUE;
2451 queue_run_pid = passed_qr_pid;
2452 queue_run_pipe = passed_qr_pipe;
2454 if (!mac_ismsgid(argv[i]))
2456 fprintf(stderr, "exim: malformed message id %s after -MC option\n",
2458 return EXIT_FAILURE;
2461 /* Set up $sending_ip_address and $sending_port */
2463 if (getsockname(fileno(stdin), (struct sockaddr *)(&interface_sock),
2465 sending_ip_address = host_ntoa(-1, &interface_sock, NULL,
2469 fprintf(stderr, "exim: getsockname() failed after -MC option: %s\n",
2471 return EXIT_FAILURE;
2474 if (running_in_test_harness) millisleep(500);
2478 /* -MCA: set the smtp_authenticated flag; this is useful only when it
2479 precedes -MC (see above). The flag indicates that the host to which
2480 Exim is connected has accepted an AUTH sequence. */
2482 else if (Ustrcmp(argrest, "CA") == 0)
2484 smtp_authenticated = TRUE;
2488 /* -MCP: set the smtp_use_pipelining flag; this is useful only when
2489 it preceded -MC (see above) */
2491 else if (Ustrcmp(argrest, "CP") == 0)
2493 smtp_use_pipelining = TRUE;
2497 /* -MCQ: pass on the pid of the queue-running process that started
2498 this chain of deliveries and the fd of its synchronizing pipe; this
2499 is useful only when it precedes -MC (see above) */
2501 else if (Ustrcmp(argrest, "CQ") == 0)
2503 if(++i < argc) passed_qr_pid = (pid_t)(Uatol(argv[i]));
2505 if(++i < argc) passed_qr_pipe = (int)(Uatol(argv[i]));
2510 /* -MCS: set the smtp_use_size flag; this is useful only when it
2511 precedes -MC (see above) */
2513 else if (Ustrcmp(argrest, "CS") == 0)
2515 smtp_use_size = TRUE;
2519 /* -MCT: set the tls_offered flag; this is useful only when it
2520 precedes -MC (see above). The flag indicates that the host to which
2521 Exim is connected has offered TLS support. */
2524 else if (Ustrcmp(argrest, "CT") == 0)
2531 /* -M[x]: various operations on the following list of message ids:
2532 -M deliver the messages, ignoring next retry times and thawing
2533 -Mc deliver the messages, checking next retry times, no thawing
2534 -Mf freeze the messages
2535 -Mg give up on the messages
2536 -Mt thaw the messages
2537 -Mrm remove the messages
2538 In the above cases, this must be the last option. There are also the
2539 following options which are followed by a single message id, and which
2540 act on that message. Some of them use the "recipient" addresses as well.
2541 -Mar add recipient(s)
2542 -Mmad mark all recipients delivered
2543 -Mmd mark recipients(s) delivered
2545 -Mset load a message for use with -be
2547 -Mvc show copy (of whole message, in RFC 2822 format)
2552 else if (*argrest == 0)
2554 msg_action = MSG_DELIVER;
2555 forced_delivery = deliver_force_thaw = TRUE;
2557 else if (Ustrcmp(argrest, "ar") == 0)
2559 msg_action = MSG_ADD_RECIPIENT;
2560 one_msg_action = TRUE;
2562 else if (Ustrcmp(argrest, "c") == 0) msg_action = MSG_DELIVER;
2563 else if (Ustrcmp(argrest, "es") == 0)
2565 msg_action = MSG_EDIT_SENDER;
2566 one_msg_action = TRUE;
2568 else if (Ustrcmp(argrest, "f") == 0) msg_action = MSG_FREEZE;
2569 else if (Ustrcmp(argrest, "g") == 0)
2571 msg_action = MSG_DELIVER;
2572 deliver_give_up = TRUE;
2574 else if (Ustrcmp(argrest, "mad") == 0)
2576 msg_action = MSG_MARK_ALL_DELIVERED;
2578 else if (Ustrcmp(argrest, "md") == 0)
2580 msg_action = MSG_MARK_DELIVERED;
2581 one_msg_action = TRUE;
2583 else if (Ustrcmp(argrest, "rm") == 0) msg_action = MSG_REMOVE;
2584 else if (Ustrcmp(argrest, "set") == 0)
2586 msg_action = MSG_LOAD;
2587 one_msg_action = TRUE;
2589 else if (Ustrcmp(argrest, "t") == 0) msg_action = MSG_THAW;
2590 else if (Ustrcmp(argrest, "vb") == 0)
2592 msg_action = MSG_SHOW_BODY;
2593 one_msg_action = TRUE;
2595 else if (Ustrcmp(argrest, "vc") == 0)
2597 msg_action = MSG_SHOW_COPY;
2598 one_msg_action = TRUE;
2600 else if (Ustrcmp(argrest, "vh") == 0)
2602 msg_action = MSG_SHOW_HEADER;
2603 one_msg_action = TRUE;
2605 else if (Ustrcmp(argrest, "vl") == 0)
2607 msg_action = MSG_SHOW_LOG;
2608 one_msg_action = TRUE;
2610 else { badarg = TRUE; break; }
2612 /* All the -Mxx options require at least one message id. */
2614 msg_action_arg = i + 1;
2615 if (msg_action_arg >= argc)
2617 fprintf(stderr, "exim: no message ids given after %s option\n", arg);
2618 return EXIT_FAILURE;
2621 /* Some require only message ids to follow */
2623 if (!one_msg_action)
2626 for (j = msg_action_arg; j < argc; j++) if (!mac_ismsgid(argv[j]))
2628 fprintf(stderr, "exim: malformed message id %s after %s option\n",
2630 return EXIT_FAILURE;
2632 goto END_ARG; /* Remaining args are ids */
2635 /* Others require only one message id, possibly followed by addresses,
2636 which will be handled as normal arguments. */
2640 if (!mac_ismsgid(argv[msg_action_arg]))
2642 fprintf(stderr, "exim: malformed message id %s after %s option\n",
2643 argv[msg_action_arg], arg);
2644 return EXIT_FAILURE;
2651 /* Some programs seem to call the -om option without the leading o;
2652 for sendmail it askes for "me too". Exim always does this. */
2655 if (*argrest != 0) badarg = TRUE;
2659 /* -N: don't do delivery - a debugging option that stops transports doing
2660 their thing. It implies debugging at the D_v level. */
2665 dont_deliver = TRUE;
2666 debug_selector |= D_v;
2667 debug_file = stderr;
2673 /* -n: This means "don't alias" in sendmail, apparently. Just ignore
2679 /* -O: Just ignore it. In sendmail, apparently -O option=value means set
2680 option to the specified value. This form uses long names. We need to handle
2681 -O option=value and -Ooption=value. */
2688 fprintf(stderr, "exim: string expected after -O\n");
2696 /* -oA: Set an argument for the bi command (sendmail's "alternate alias
2699 if (*argrest == 'A')
2701 alias_arg = argrest + 1;
2702 if (alias_arg[0] == 0)
2704 if (i+1 < argc) alias_arg = argv[++i]; else
2706 fprintf(stderr, "exim: string expected after -oA\n");
2712 /* -oB: Set a connection message max value for remote deliveries */
2714 else if (*argrest == 'B')
2716 uschar *p = argrest + 1;
2719 if (i+1 < argc && isdigit((argv[i+1][0]))) p = argv[++i]; else
2721 connection_max_messages = 1;
2730 fprintf(stderr, "exim: number expected after -oB\n");
2733 connection_max_messages = Uatoi(p);
2737 /* -odb: background delivery */
2739 else if (Ustrcmp(argrest, "db") == 0)
2741 synchronous_delivery = FALSE;
2742 arg_queue_only = FALSE;
2743 queue_only_set = TRUE;
2746 /* -odf: foreground delivery (smail-compatible option); same effect as
2747 -odi: interactive (synchronous) delivery (sendmail-compatible option)
2750 else if (Ustrcmp(argrest, "df") == 0 || Ustrcmp(argrest, "di") == 0)
2752 synchronous_delivery = TRUE;
2753 arg_queue_only = FALSE;
2754 queue_only_set = TRUE;
2757 /* -odq: queue only */
2759 else if (Ustrcmp(argrest, "dq") == 0)
2761 synchronous_delivery = FALSE;
2762 arg_queue_only = TRUE;
2763 queue_only_set = TRUE;
2766 /* -odqs: queue SMTP only - do local deliveries and remote routing,
2767 but no remote delivery */
2769 else if (Ustrcmp(argrest, "dqs") == 0)
2772 arg_queue_only = FALSE;
2773 queue_only_set = TRUE;
2776 /* -oex: Sendmail error flags. As these are also accepted without the
2777 leading -o prefix, for compatibility with vacation and other callers,
2778 they are handled with -e above. */
2780 /* -oi: Set flag so dot doesn't end non-SMTP input (same as -i)
2781 -oitrue: Another sendmail syntax for the same */
2783 else if (Ustrcmp(argrest, "i") == 0 ||
2784 Ustrcmp(argrest, "itrue") == 0)
2787 /* -oM*: Set various characteristics for an incoming message; actually
2788 acted on for trusted callers only. */
2790 else if (*argrest == 'M')
2794 fprintf(stderr, "exim: data expected after -o%s\n", argrest);
2798 /* -oMa: Set sender host address */
2800 if (Ustrcmp(argrest, "Ma") == 0) sender_host_address = argv[++i];
2802 /* -oMaa: Set authenticator name */
2804 else if (Ustrcmp(argrest, "Maa") == 0)
2805 sender_host_authenticated = argv[++i];
2807 /* -oMas: setting authenticated sender */
2809 else if (Ustrcmp(argrest, "Mas") == 0) authenticated_sender = argv[++i];
2811 /* -oMai: setting authenticated id */
2813 else if (Ustrcmp(argrest, "Mai") == 0) authenticated_id = argv[++i];
2815 /* -oMi: Set incoming interface address */
2817 else if (Ustrcmp(argrest, "Mi") == 0) interface_address = argv[++i];
2819 /* -oMr: Received protocol */
2821 else if (Ustrcmp(argrest, "Mr") == 0) received_protocol = argv[++i];
2823 /* -oMs: Set sender host name */
2825 else if (Ustrcmp(argrest, "Ms") == 0) sender_host_name = argv[++i];
2827 /* -oMt: Set sender ident */
2829 else if (Ustrcmp(argrest, "Mt") == 0)
2831 sender_ident_set = TRUE;
2832 sender_ident = argv[++i];
2835 /* Else a bad argument */
2844 /* -om: Me-too flag for aliases. Exim always does this. Some programs
2845 seem to call this as -m (undocumented), so that is also accepted (see
2848 else if (Ustrcmp(argrest, "m") == 0) {}
2850 /* -oo: An ancient flag for old-style addresses which still seems to
2851 crop up in some calls (see in SCO). */
2853 else if (Ustrcmp(argrest, "o") == 0) {}
2855 /* -oP <name>: set pid file path for daemon */
2857 else if (Ustrcmp(argrest, "P") == 0)
2858 override_pid_file_path = argv[++i];
2860 /* -or <n>: set timeout for non-SMTP acceptance
2861 -os <n>: set timeout for SMTP acceptance */
2863 else if (*argrest == 'r' || *argrest == 's')
2865 int *tp = (*argrest == 'r')?
2866 &arg_receive_timeout : &arg_smtp_receive_timeout;
2867 if (argrest[1] == 0)
2869 if (i+1 < argc) *tp= readconf_readtime(argv[++i], 0, FALSE);
2871 else *tp = readconf_readtime(argrest + 1, 0, FALSE);
2874 fprintf(stderr, "exim: bad time value %s: abandoned\n", argv[i]);
2879 /* -oX <list>: Override local_interfaces and/or default daemon ports */
2881 else if (Ustrcmp(argrest, "X") == 0)
2882 override_local_interfaces = argv[++i];
2884 /* Unknown -o argument */
2890 /* -ps: force Perl startup; -pd force delayed Perl startup */
2894 if (*argrest == 's' && argrest[1] == 0)
2896 perl_start_option = 1;
2899 if (*argrest == 'd' && argrest[1] == 0)
2901 perl_start_option = -1;
2906 /* -panythingelse is taken as the Sendmail-compatible argument -prval:sval,
2907 which sets the host protocol and host name */
2911 if (i+1 < argc) argrest = argv[++i]; else
2912 { badarg = TRUE; break; }
2917 uschar *hn = Ustrchr(argrest, ':');
2920 received_protocol = argrest;
2924 received_protocol = string_copyn(argrest, hn - argrest);
2925 sender_host_name = hn + 1;
2932 receiving_message = FALSE;
2933 if (queue_interval >= 0)
2935 fprintf(stderr, "exim: -q specified more than once\n");
2939 /* -qq...: Do queue runs in a 2-stage manner */
2941 if (*argrest == 'q')
2943 queue_2stage = TRUE;
2947 /* -qi...: Do only first (initial) deliveries */
2949 if (*argrest == 'i')
2951 queue_run_first_delivery = TRUE;
2955 /* -qf...: Run the queue, forcing deliveries
2956 -qff..: Ditto, forcing thawing as well */
2958 if (*argrest == 'f')
2960 queue_run_force = TRUE;
2961 if (*(++argrest) == 'f')
2963 deliver_force_thaw = TRUE;
2968 /* -q[f][f]l...: Run the queue only on local deliveries */
2970 if (*argrest == 'l')
2972 queue_run_local = TRUE;
2976 /* -q[f][f][l]: Run the queue, optionally forced, optionally local only,
2977 optionally starting from a given message id. */
2979 if (*argrest == 0 &&
2980 (i + 1 >= argc || argv[i+1][0] == '-' || mac_ismsgid(argv[i+1])))
2983 if (i+1 < argc && mac_ismsgid(argv[i+1]))
2984 start_queue_run_id = argv[++i];
2985 if (i+1 < argc && mac_ismsgid(argv[i+1]))
2986 stop_queue_run_id = argv[++i];
2989 /* -q[f][f][l]<n>: Run the queue at regular intervals, optionally forced,
2990 optionally local only. */
2995 queue_interval = readconf_readtime(argrest, 0, FALSE);
2997 queue_interval = readconf_readtime(argv[++i], 0, FALSE);
2998 if (queue_interval <= 0)
3000 fprintf(stderr, "exim: bad time value %s: abandoned\n", argv[i]);
3007 case 'R': /* Synonymous with -qR... */
3008 receiving_message = FALSE;
3010 /* -Rf: As -R (below) but force all deliveries,
3011 -Rff: Ditto, but also thaw all frozen messages,
3012 -Rr: String is regex
3013 -Rrf: Regex and force
3014 -Rrff: Regex and force and thaw
3016 in all cases provided there are no further characters in this
3022 for (i = 0; i < sizeof(rsopts)/sizeof(uschar *); i++)
3024 if (Ustrcmp(argrest, rsopts[i]) == 0)
3026 if (i != 2) queue_run_force = TRUE;
3027 if (i >= 2) deliver_selectstring_regex = TRUE;
3028 if (i == 1 || i == 4) deliver_force_thaw = TRUE;
3029 argrest += Ustrlen(rsopts[i]);
3034 /* -R: Set string to match in addresses for forced queue run to
3035 pick out particular messages. */
3039 if (i+1 < argc) deliver_selectstring = argv[++i]; else
3041 fprintf(stderr, "exim: string expected after -R\n");
3045 else deliver_selectstring = argrest;
3049 /* -r: an obsolete synonym for -f (see above) */
3052 /* -S: Like -R but works on sender. */
3054 case 'S': /* Synonymous with -qS... */
3055 receiving_message = FALSE;
3057 /* -Sf: As -S (below) but force all deliveries,
3058 -Sff: Ditto, but also thaw all frozen messages,
3059 -Sr: String is regex
3060 -Srf: Regex and force
3061 -Srff: Regex and force and thaw
3063 in all cases provided there are no further characters in this
3069 for (i = 0; i < sizeof(rsopts)/sizeof(uschar *); i++)
3071 if (Ustrcmp(argrest, rsopts[i]) == 0)
3073 if (i != 2) queue_run_force = TRUE;
3074 if (i >= 2) deliver_selectstring_sender_regex = TRUE;
3075 if (i == 1 || i == 4) deliver_force_thaw = TRUE;
3076 argrest += Ustrlen(rsopts[i]);
3081 /* -S: Set string to match in addresses for forced queue run to
3082 pick out particular messages. */
3086 if (i+1 < argc) deliver_selectstring_sender = argv[++i]; else
3088 fprintf(stderr, "exim: string expected after -S\n");
3092 else deliver_selectstring_sender = argrest;
3095 /* -Tqt is an option that is exclusively for use by the testing suite.
3096 It is not recognized in other circumstances. It allows for the setting up
3097 of explicit "queue times" so that various warning/retry things can be
3098 tested. Otherwise variability of clock ticks etc. cause problems. */
3101 if (running_in_test_harness && Ustrcmp(argrest, "qt") == 0)
3102 fudged_queue_times = argv[++i];
3107 /* -t: Set flag to extract recipients from body of message. */
3110 if (*argrest == 0) extract_recipients = TRUE;
3112 /* -ti: Set flag to extract recipients from body of message, and also
3113 specify that dot does not end the message. */
3115 else if (Ustrcmp(argrest, "i") == 0)
3117 extract_recipients = TRUE;
3121 /* -tls-on-connect: don't wait for STARTTLS (for old clients) */
3124 else if (Ustrcmp(argrest, "ls-on-connect") == 0) tls_on_connect = TRUE;
3131 /* -U: This means "initial user submission" in sendmail, apparently. The
3132 doc claims that in future sendmail may refuse syntactically invalid
3133 messages instead of fixing them. For the moment, we just ignore it. */
3139 /* -v: verify things - this is a very low-level debugging */
3144 debug_selector |= D_v;
3145 debug_file = stderr;
3151 /* -x: AIX uses this to indicate some fancy 8-bit character stuff:
3153 The -x flag tells the sendmail command that mail from a local
3154 mail program has National Language Support (NLS) extended characters
3155 in the body of the mail item. The sendmail command can send mail with
3156 extended NLS characters across networks that normally corrupts these
3159 As Exim is 8-bit clean, it just ignores this flag. */
3162 if (*argrest != 0) badarg = TRUE;
3165 /* All other initial characters are errors */
3170 } /* End of high-level switch statement */
3172 /* Failed to recognize the option, or syntax error */
3176 fprintf(stderr, "exim abandoned: unknown, malformed, or incomplete "
3177 "option %s\n", arg);
3183 /* If -R or -S have been specified without -q, assume a single queue run. */
3185 if ((deliver_selectstring != NULL || deliver_selectstring_sender != NULL) &&
3186 queue_interval < 0) queue_interval = 0;
3190 /* If usage_wanted is set we call the usage function - which never returns */
3191 if (usage_wanted) exim_usage(called_as);
3193 /* Arguments have been processed. Check for incompatibilities. */
3195 (smtp_input || extract_recipients || recipients_arg < argc) &&
3196 (daemon_listen || queue_interval >= 0 || bi_option ||
3197 test_retry_arg >= 0 || test_rewrite_arg >= 0 ||
3198 filter_test != FTEST_NONE || (msg_action_arg > 0 && !one_msg_action))
3201 msg_action_arg > 0 &&
3202 (daemon_listen || queue_interval >= 0 || list_options ||
3203 (checking && msg_action != MSG_LOAD) ||
3204 bi_option || test_retry_arg >= 0 || test_rewrite_arg >= 0)
3207 (daemon_listen || queue_interval >= 0) &&
3208 (sender_address != NULL || list_options || list_queue || checking ||
3212 daemon_listen && queue_interval == 0
3216 (checking || smtp_input || extract_recipients ||
3217 filter_test != FTEST_NONE || bi_option)
3220 verify_address_mode &&
3221 (address_test_mode || smtp_input || extract_recipients ||
3222 filter_test != FTEST_NONE || bi_option)
3225 address_test_mode && (smtp_input || extract_recipients ||
3226 filter_test != FTEST_NONE || bi_option)
3229 smtp_input && (sender_address != NULL || filter_test != FTEST_NONE ||
3233 deliver_selectstring != NULL && queue_interval < 0
3236 msg_action == MSG_LOAD &&
3237 (!expansion_test || expansion_test_message != NULL)
3241 fprintf(stderr, "exim: incompatible command-line options or arguments\n");
3245 /* If debugging is set up, set the file and the file descriptor to pass on to
3246 child processes. It should, of course, be 2 for stderr. Also, force the daemon
3247 to run in the foreground. */
3249 if (debug_selector != 0)
3251 debug_file = stderr;
3252 debug_fd = fileno(debug_file);
3253 background_daemon = FALSE;
3254 if (running_in_test_harness) millisleep(100); /* lets caller finish */
3255 if (debug_selector != D_v) /* -v only doesn't show this */
3257 debug_printf("Exim version %s uid=%ld gid=%ld pid=%d D=%x\n",
3258 version_string, (long int)real_uid, (long int)real_gid, (int)getpid(),
3260 if (!version_printed)
3261 show_whats_supported(stderr);
3265 /* When started with root privilege, ensure that the limits on the number of
3266 open files and the number of processes (where that is accessible) are
3267 sufficiently large, or are unset, in case Exim has been called from an
3268 environment where the limits are screwed down. Not all OS have the ability to
3269 change some of these limits. */
3273 DEBUG(D_any) debug_print_ids(US"Exim has no root privilege:");
3279 #ifdef RLIMIT_NOFILE
3280 if (getrlimit(RLIMIT_NOFILE, &rlp) < 0)
3282 log_write(0, LOG_MAIN|LOG_PANIC, "getrlimit(RLIMIT_NOFILE) failed: %s",
3284 rlp.rlim_cur = rlp.rlim_max = 0;
3287 /* I originally chose 1000 as a nice big number that was unlikely to
3288 be exceeded. It turns out that some older OS have a fixed upper limit of
3291 if (rlp.rlim_cur < 1000)
3293 rlp.rlim_cur = rlp.rlim_max = 1000;
3294 if (setrlimit(RLIMIT_NOFILE, &rlp) < 0)
3296 rlp.rlim_cur = rlp.rlim_max = 256;
3297 if (setrlimit(RLIMIT_NOFILE, &rlp) < 0)
3298 log_write(0, LOG_MAIN|LOG_PANIC, "setrlimit(RLIMIT_NOFILE) failed: %s",
3305 if (getrlimit(RLIMIT_NPROC, &rlp) < 0)
3307 log_write(0, LOG_MAIN|LOG_PANIC, "getrlimit(RLIMIT_NPROC) failed: %s",
3309 rlp.rlim_cur = rlp.rlim_max = 0;
3312 #ifdef RLIM_INFINITY
3313 if (rlp.rlim_cur != RLIM_INFINITY && rlp.rlim_cur < 1000)
3315 rlp.rlim_cur = rlp.rlim_max = RLIM_INFINITY;
3317 if (rlp.rlim_cur < 1000)
3319 rlp.rlim_cur = rlp.rlim_max = 1000;
3321 if (setrlimit(RLIMIT_NPROC, &rlp) < 0)
3322 log_write(0, LOG_MAIN|LOG_PANIC, "setrlimit(RLIMIT_NPROC) failed: %s",
3328 /* Exim is normally entered as root (but some special configurations are
3329 possible that don't do this). However, it always spins off sub-processes that
3330 set their uid and gid as required for local delivery. We don't want to pass on
3331 any extra groups that root may belong to, so we want to get rid of them all at
3334 We need to obey setgroups() at this stage, before possibly giving up root
3335 privilege for a changed configuration file, but later on we might need to
3336 check on the additional groups for the admin user privilege - can't do that
3337 till after reading the config, which might specify the exim gid. Therefore,
3338 save the group list here first. */
3340 group_count = getgroups(NGROUPS_MAX, group_list);
3341 if (group_count < 0)
3343 fprintf(stderr, "exim: getgroups() failed: %s\n", strerror(errno));
3347 /* There is a fundamental difference in some BSD systems in the matter of
3348 groups. FreeBSD and BSDI are known to be different; NetBSD and OpenBSD are
3349 known not to be different. On the "different" systems there is a single group
3350 list, and the first entry in it is the current group. On all other versions of
3351 Unix there is a supplementary group list, which is in *addition* to the current
3352 group. Consequently, to get rid of all extraneous groups on a "standard" system
3353 you pass over 0 groups to setgroups(), while on a "different" system you pass
3354 over a single group - the current group, which is always the first group in the
3355 list. Calling setgroups() with zero groups on a "different" system results in
3356 an error return. The following code should cope with both types of system.
3358 However, if this process isn't running as root, setgroups() can't be used
3359 since you have to be root to run it, even if throwing away groups. Not being
3360 root here happens only in some unusual configurations. We just ignore the
3363 if (setgroups(0, NULL) != 0)
3365 if (setgroups(1, group_list) != 0 && !unprivileged)
3367 fprintf(stderr, "exim: setgroups() failed: %s\n", strerror(errno));
3372 /* If the configuration file name has been altered by an argument on the
3373 command line (either a new file name or a macro definition) and the caller is
3374 not root, or if this is a filter testing run, remove any setuid privilege the
3375 program has and run as the underlying user.
3377 The exim user is locked out of this, which severely restricts the use of -C
3380 Otherwise, set the real ids to the effective values (should be root unless run
3381 from inetd, which it can either be root or the exim uid, if one is configured).
3383 There is a private mechanism for bypassing some of this, in order to make it
3384 possible to test lots of configurations automatically, without having either to
3385 recompile each time, or to patch in an actual configuration file name and other
3386 values (such as the path name). If running in the test harness, pretend that
3387 configuration file changes and macro definitions haven't happened. */
3390 (!trusted_config || /* Config changed, or */
3391 !macros_trusted()) && /* impermissible macros and */
3392 real_uid != root_uid && /* Not root, and */
3393 !running_in_test_harness /* Not fudged */
3395 expansion_test /* expansion testing */
3397 filter_test != FTEST_NONE) /* Filter testing */
3399 setgroups(group_count, group_list);
3400 exim_setugid(real_uid, real_gid, FALSE,
3401 US"-C, -D, -be or -bf forces real uid");
3402 removed_privilege = TRUE;
3404 /* In the normal case when Exim is called like this, stderr is available
3405 and should be used for any logging information because attempts to write
3406 to the log will usually fail. To arrange this, we unset really_exim. However,
3407 if no stderr is available there is no point - we might as well have a go
3408 at the log (if it fails, syslog will be written).
3410 Note that if the invoker is Exim, the logs remain available. Messing with
3411 this causes unlogged successful deliveries. */
3413 if ((log_stderr != NULL) && (real_uid != exim_uid))
3414 really_exim = FALSE;
3417 /* Privilege is to be retained for the moment. It may be dropped later,
3418 depending on the job that this Exim process has been asked to do. For now, set
3419 the real uid to the effective so that subsequent re-execs of Exim are done by a
3422 else exim_setugid(geteuid(), getegid(), FALSE, US"forcing real = effective");
3424 /* If testing a filter, open the file(s) now, before wasting time doing other
3425 setups and reading the message. */
3427 if ((filter_test & FTEST_SYSTEM) != 0)
3429 filter_sfd = Uopen(filter_test_sfile, O_RDONLY, 0);
3432 fprintf(stderr, "exim: failed to open %s: %s\n", filter_test_sfile,
3434 return EXIT_FAILURE;
3438 if ((filter_test & FTEST_USER) != 0)
3440 filter_ufd = Uopen(filter_test_ufile, O_RDONLY, 0);
3443 fprintf(stderr, "exim: failed to open %s: %s\n", filter_test_ufile,
3445 return EXIT_FAILURE;
3449 /* Read the main runtime configuration data; this gives up if there
3450 is a failure. It leaves the configuration file open so that the subsequent
3451 configuration data for delivery can be read if needed. */
3455 /* Handle the decoding of logging options. */
3457 decode_bits(&log_write_selector, &log_extra_selector, 0, 0,
3458 log_selector_string, log_options, log_options_count, US"log", 0);
3462 debug_printf("configuration file is %s\n", config_main_filename);
3463 debug_printf("log selectors = %08x %08x\n", log_write_selector,
3464 log_extra_selector);
3467 /* If domain literals are not allowed, check the sender address that was
3468 supplied with -f. Ditto for a stripped trailing dot. */
3470 if (sender_address != NULL)
3472 if (sender_address[sender_address_domain] == '[' && !allow_domain_literals)
3474 fprintf(stderr, "exim: bad -f address \"%s\": domain literals not "
3475 "allowed\n", sender_address);
3476 return EXIT_FAILURE;
3478 if (f_end_dot && !strip_trailing_dot)
3480 fprintf(stderr, "exim: bad -f address \"%s.\": domain is malformed "
3481 "(trailing dot not allowed)\n", sender_address);
3482 return EXIT_FAILURE;
3486 /* Paranoia check of maximum lengths of certain strings. There is a check
3487 on the length of the log file path in log.c, which will come into effect
3488 if there are any calls to write the log earlier than this. However, if we
3489 get this far but the string is very long, it is better to stop now than to
3490 carry on and (e.g.) receive a message and then have to collapse. The call to
3491 log_write() from here will cause the ultimate panic collapse if the complete
3492 file name exceeds the buffer length. */
3494 if (Ustrlen(log_file_path) > 200)
3495 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3496 "log_file_path is longer than 200 chars: aborting");
3498 if (Ustrlen(pid_file_path) > 200)
3499 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3500 "pid_file_path is longer than 200 chars: aborting");
3502 if (Ustrlen(spool_directory) > 200)
3503 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3504 "spool_directory is longer than 200 chars: aborting");
3506 /* Length check on the process name given to syslog for its TAG field,
3507 which is only permitted to be 32 characters or less. See RFC 3164. */
3509 if (Ustrlen(syslog_processname) > 32)
3510 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3511 "syslog_processname is longer than 32 chars: aborting");
3513 /* In some operating systems, the environment variable TMPDIR controls where
3514 temporary files are created; Exim doesn't use these (apart from when delivering
3515 to MBX mailboxes), but called libraries such as DBM libraries may require them.
3516 If TMPDIR is found in the environment, reset it to the value defined in the
3517 TMPDIR macro, if this macro is defined. */
3522 for (p = USS environ; *p != NULL; p++)
3524 if (Ustrncmp(*p, "TMPDIR=", 7) == 0 &&
3525 Ustrcmp(*p+7, TMPDIR) != 0)
3527 uschar *newp = malloc(Ustrlen(TMPDIR) + 8);
3528 sprintf(CS newp, "TMPDIR=%s", TMPDIR);
3530 DEBUG(D_any) debug_printf("reset TMPDIR=%s in environment\n", TMPDIR);
3536 /* Timezone handling. If timezone_string is "utc", set a flag to cause all
3537 timestamps to be in UTC (gmtime() is used instead of localtime()). Otherwise,
3538 we may need to get rid of a bogus timezone setting. This can arise when Exim is
3539 called by a user who has set the TZ variable. This then affects the timestamps
3540 in log files and in Received: headers, and any created Date: header lines. The
3541 required timezone is settable in the configuration file, so nothing can be done
3542 about this earlier - but hopefully nothing will normally be logged earlier than
3543 this. We have to make a new environment if TZ is wrong, but don't bother if
3544 timestamps_utc is set, because then all times are in UTC anyway. */
3546 if (timezone_string != NULL && strcmpic(timezone_string, US"UTC") == 0)
3548 timestamps_utc = TRUE;
3552 uschar *envtz = US getenv("TZ");
3553 if ((envtz == NULL && timezone_string != NULL) ||
3555 (timezone_string == NULL ||
3556 Ustrcmp(timezone_string, envtz) != 0)))
3558 uschar **p = USS environ;
3562 while (*p++ != NULL) count++;
3563 if (envtz == NULL) count++;
3564 newp = new = malloc(sizeof(uschar *) * (count + 1));
3565 for (p = USS environ; *p != NULL; p++)
3567 if (Ustrncmp(*p, "TZ=", 3) == 0) continue;
3570 if (timezone_string != NULL)
3572 *newp = malloc(Ustrlen(timezone_string) + 4);
3573 sprintf(CS *newp++, "TZ=%s", timezone_string);
3578 DEBUG(D_any) debug_printf("Reset TZ to %s: time is %s\n", timezone_string,
3579 tod_stamp(tod_log));
3583 /* Handle the case when we have removed the setuid privilege because of -C or
3584 -D. This means that the caller of Exim was not root.
3586 There is a problem if we were running as the Exim user. The sysadmin may
3587 expect this case to retain privilege because "the binary was called by the
3588 Exim user", but it hasn't, because either the -D option set macros, or the
3589 -C option set a non-trusted configuration file. There are two possibilities:
3591 (1) If deliver_drop_privilege is set, Exim is not going to re-exec in order
3592 to do message deliveries. Thus, the fact that it is running as a
3593 non-privileged user is plausible, and might be wanted in some special
3594 configurations. However, really_exim will have been set false when
3595 privilege was dropped, to stop Exim trying to write to its normal log
3596 files. Therefore, re-enable normal log processing, assuming the sysadmin
3597 has set up the log directory correctly.
3599 (2) If deliver_drop_privilege is not set, the configuration won't work as
3600 apparently intended, and so we log a panic message. In order to retain
3601 root for -C or -D, the caller must either be root or be invoking a
3602 trusted configuration file (when deliver_drop_privilege is false). */
3604 if (removed_privilege && (!trusted_config || macros != NULL) &&
3605 real_uid == exim_uid)
3607 if (deliver_drop_privilege)
3608 really_exim = TRUE; /* let logging work normally */
3610 log_write(0, LOG_MAIN|LOG_PANIC,
3611 "exim user lost privilege for using %s option",
3612 trusted_config? "-D" : "-C");
3615 /* Start up Perl interpreter if Perl support is configured and there is a
3616 perl_startup option, and the configuration or the command line specifies
3617 initializing starting. Note that the global variables are actually called
3618 opt_perl_xxx to avoid clashing with perl's namespace (perl_*). */
3621 if (perl_start_option != 0)
3622 opt_perl_at_start = (perl_start_option > 0);
3623 if (opt_perl_at_start && opt_perl_startup != NULL)
3626 DEBUG(D_any) debug_printf("Starting Perl interpreter\n");
3627 errstr = init_perl(opt_perl_startup);
3630 fprintf(stderr, "exim: error in perl_startup code: %s\n", errstr);
3631 return EXIT_FAILURE;
3633 opt_perl_started = TRUE;
3635 #endif /* EXIM_PERL */
3637 /* Initialise lookup_list
3638 If debugging, already called above via version reporting.
3639 This does mean that debugging causes the list to be initialised while root.
3640 This *should* be harmless -- all modules are loaded from a fixed dir and
3641 it's code that would, if not a module, be part of Exim already. */
3644 /* Log the arguments of the call if the configuration file said so. This is
3645 a debugging feature for finding out what arguments certain MUAs actually use.
3646 Don't attempt it if logging is disabled, or if listing variables or if
3647 verifying/testing addresses or expansions. */
3649 if (((debug_selector & D_any) != 0 || (log_extra_selector & LX_arguments) != 0)
3650 && really_exim && !list_options && !checking)
3653 uschar *p = big_buffer;
3655 (void)getcwd(CS p+4, big_buffer_size - 4);
3657 (void)string_format(p, big_buffer_size - (p - big_buffer), " %d args:", argc);
3659 for (i = 0; i < argc; i++)
3661 int len = Ustrlen(argv[i]);
3664 if (p + len + 8 >= big_buffer + big_buffer_size)
3667 log_write(0, LOG_MAIN, "%s", big_buffer);
3668 Ustrcpy(big_buffer, "...");
3671 printing = string_printing(argv[i]);
3672 if (printing[0] == 0) quote = US"\""; else
3674 uschar *pp = printing;
3676 while (*pp != 0) if (isspace(*pp++)) { quote = US"\""; break; }
3678 sprintf(CS p, " %s%.*s%s", quote, (int)(big_buffer_size -
3679 (p - big_buffer) - 4), printing, quote);
3683 if ((log_extra_selector & LX_arguments) != 0)
3684 log_write(0, LOG_MAIN, "%s", big_buffer);
3686 debug_printf("%s\n", big_buffer);
3689 /* Set the working directory to be the top-level spool directory. We don't rely
3690 on this in the code, which always uses fully qualified names, but it's useful
3691 for core dumps etc. Don't complain if it fails - the spool directory might not
3692 be generally accessible and calls with the -C option (and others) have lost
3693 privilege by now. Before the chdir, we try to ensure that the directory exists.
3696 if (Uchdir(spool_directory) != 0)
3698 (void)directory_make(spool_directory, US"", SPOOL_DIRECTORY_MODE, FALSE);
3699 (void)Uchdir(spool_directory);
3702 /* Handle calls with the -bi option. This is a sendmail option to rebuild *the*
3703 alias file. Exim doesn't have such a concept, but this call is screwed into
3704 Sun's YP makefiles. Handle this by calling a configured script, as the real
3705 user who called Exim. The -oA option can be used to pass an argument to the
3710 (void)fclose(config_file);
3711 if (bi_command != NULL)
3715 argv[i++] = bi_command;
3716 if (alias_arg != NULL) argv[i++] = alias_arg;
3719 setgroups(group_count, group_list);
3720 exim_setugid(real_uid, real_gid, FALSE, US"running bi_command");
3722 DEBUG(D_exec) debug_printf("exec %.256s %.256s\n", argv[0],
3723 (argv[1] == NULL)? US"" : argv[1]);
3725 execv(CS argv[0], (char *const *)argv);
3726 fprintf(stderr, "exim: exec failed: %s\n", strerror(errno));
3731 DEBUG(D_any) debug_printf("-bi used but bi_command not set; exiting\n");
3736 /* If an action on specific messages is requested, or if a daemon or queue
3737 runner is being started, we need to know if Exim was called by an admin user.
3738 This is the case if the real user is root or exim, or if the real group is
3739 exim, or if one of the supplementary groups is exim or a group listed in
3740 admin_groups. We don't fail all message actions immediately if not admin_user,
3741 since some actions can be performed by non-admin users. Instead, set admin_user
3742 for later interrogation. */
3744 if (real_uid == root_uid || real_uid == exim_uid || real_gid == exim_gid)
3749 for (i = 0; i < group_count; i++)
3751 if (group_list[i] == exim_gid) admin_user = TRUE;
3752 else if (admin_groups != NULL)
3754 for (j = 1; j <= (int)(admin_groups[0]); j++)
3755 if (admin_groups[j] == group_list[i])
3756 { admin_user = TRUE; break; }
3758 if (admin_user) break;
3762 /* Another group of privileged users are the trusted users. These are root,
3763 exim, and any caller matching trusted_users or trusted_groups. Trusted callers
3764 are permitted to specify sender_addresses with -f on the command line, and
3765 other message parameters as well. */
3767 if (real_uid == root_uid || real_uid == exim_uid)
3768 trusted_caller = TRUE;
3773 if (trusted_users != NULL)
3775 for (i = 1; i <= (int)(trusted_users[0]); i++)
3776 if (trusted_users[i] == real_uid)
3777 { trusted_caller = TRUE; break; }
3780 if (!trusted_caller && trusted_groups != NULL)
3782 for (i = 1; i <= (int)(trusted_groups[0]); i++)
3784 if (trusted_groups[i] == real_gid)
3785 trusted_caller = TRUE;
3786 else for (j = 0; j < group_count; j++)
3788 if (trusted_groups[i] == group_list[j])
3789 { trusted_caller = TRUE; break; }
3791 if (trusted_caller) break;
3796 if (trusted_caller) DEBUG(D_any) debug_printf("trusted user\n");
3797 if (admin_user) DEBUG(D_any) debug_printf("admin user\n");
3799 /* Only an admin user may start the daemon or force a queue run in the default
3800 configuration, but the queue run restriction can be relaxed. Only an admin
3801 user may request that a message be returned to its sender forthwith. Only an
3802 admin user may specify a debug level greater than D_v (because it might show
3803 passwords, etc. in lookup queries). Only an admin user may request a queue
3804 count. Only an admin user can use the test interface to scan for email
3805 (because Exim will be in the spool dir and able to look at mails). */
3809 BOOL debugset = (debug_selector & ~D_v) != 0;
3810 if (deliver_give_up || daemon_listen || malware_test_file ||
3811 (count_queue && queue_list_requires_admin) ||
3812 (list_queue && queue_list_requires_admin) ||
3813 (queue_interval >= 0 && prod_requires_admin) ||
3814 (debugset && !running_in_test_harness))
3816 fprintf(stderr, "exim:%s permission denied\n", debugset? " debugging" : "");
3821 /* If the real user is not root or the exim uid, the argument for passing
3822 in an open TCP/IP connection for another message is not permitted, nor is
3823 running with the -N option for any delivery action, unless this call to exim is
3824 one that supplied an input message, or we are using a patched exim for
3825 regression testing. */
3827 if (real_uid != root_uid && real_uid != exim_uid &&
3828 (continue_hostname != NULL ||
3830 (queue_interval >= 0 || daemon_listen || msg_action_arg > 0)
3831 )) && !running_in_test_harness)
3833 fprintf(stderr, "exim: Permission denied\n");
3834 return EXIT_FAILURE;
3837 /* If the caller is not trusted, certain arguments are ignored when running for
3838 real, but are permitted when checking things (-be, -bv, -bt, -bh, -bf, -bF).
3839 Note that authority for performing certain actions on messages is tested in the
3840 queue_action() function. */
3842 if (!trusted_caller && !checking && filter_test == FTEST_NONE)
3844 sender_host_name = sender_host_address = interface_address =
3845 sender_ident = received_protocol = NULL;
3846 sender_host_port = interface_port = 0;
3847 sender_host_authenticated = authenticated_sender = authenticated_id = NULL;
3850 /* If a sender host address is set, extract the optional port number off the
3851 end of it and check its syntax. Do the same thing for the interface address.
3852 Exim exits if the syntax is bad. */
3856 if (sender_host_address != NULL)
3857 sender_host_port = check_port(sender_host_address);
3858 if (interface_address != NULL)
3859 interface_port = check_port(interface_address);
3862 /* If an SMTP message is being received check to see if the standard input is a
3863 TCP/IP socket. If it is, we assume that Exim was called from inetd if the
3864 caller is root or the Exim user, or if the port is a privileged one. Otherwise,
3869 union sockaddr_46 inetd_sock;
3870 EXIM_SOCKLEN_T size = sizeof(inetd_sock);
3871 if (getpeername(0, (struct sockaddr *)(&inetd_sock), &size) == 0)
3873 int family = ((struct sockaddr *)(&inetd_sock))->sa_family;
3874 if (family == AF_INET || family == AF_INET6)
3876 union sockaddr_46 interface_sock;
3877 size = sizeof(interface_sock);
3879 if (getsockname(0, (struct sockaddr *)(&interface_sock), &size) == 0)
3880 interface_address = host_ntoa(-1, &interface_sock, NULL,
3883 if (host_is_tls_on_connect_port(interface_port)) tls_on_connect = TRUE;
3885 if (real_uid == root_uid || real_uid == exim_uid || interface_port < 1024)
3888 sender_host_address = host_ntoa(-1, (struct sockaddr *)(&inetd_sock),
3889 NULL, &sender_host_port);
3890 if (mua_wrapper) log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Input from "
3891 "inetd is not supported when mua_wrapper is set");
3896 "exim: Permission denied (unprivileged user, unprivileged port)\n");
3897 return EXIT_FAILURE;
3903 /* If the load average is going to be needed while receiving a message, get it
3904 now for those OS that require the first call to os_getloadavg() to be done as
3905 root. There will be further calls later for each message received. */
3907 #ifdef LOAD_AVG_NEEDS_ROOT
3908 if (receiving_message &&
3909 (queue_only_load >= 0 ||
3910 (is_inetd && smtp_load_reserve >= 0)
3913 load_average = OS_GETLOADAVG();
3917 /* The queue_only configuration option can be overridden by -odx on the command
3918 line, except that if queue_only_override is false, queue_only cannot be unset
3919 from the command line. */
3921 if (queue_only_set && (queue_only_override || arg_queue_only))
3922 queue_only = arg_queue_only;
3924 /* The receive_timeout and smtp_receive_timeout options can be overridden by
3927 if (arg_receive_timeout >= 0) receive_timeout = arg_receive_timeout;
3928 if (arg_smtp_receive_timeout >= 0)
3929 smtp_receive_timeout = arg_smtp_receive_timeout;
3931 /* If Exim was started with root privilege, unless we have already removed the
3932 root privilege above as a result of -C, -D, -be, -bf or -bF, remove it now
3933 except when starting the daemon or doing some kind of delivery or address
3934 testing (-bt). These are the only cases when root need to be retained. We run
3935 as exim for -bv and -bh. However, if deliver_drop_privilege is set, root is
3936 retained only for starting the daemon. We always do the initgroups() in this
3937 situation (controlled by the TRUE below), in order to be as close as possible
3938 to the state Exim usually runs in. */
3940 if (!unprivileged && /* originally had root AND */
3941 !removed_privilege && /* still got root AND */
3942 !daemon_listen && /* not starting the daemon */
3943 queue_interval <= 0 && /* (either kind of daemon) */
3945 deliver_drop_privilege || /* requested unprivileged */
3947 queue_interval < 0 && /* not running the queue */
3948 (msg_action_arg < 0 || /* and */
3949 msg_action != MSG_DELIVER) && /* not delivering and */
3950 (!checking || !address_test_mode) /* not address checking */
3954 exim_setugid(exim_uid, exim_gid, TRUE, US"privilege not needed");
3957 /* When we are retaining a privileged uid, we still change to the exim gid. */
3962 rv = setgid(exim_gid);
3963 /* Impact of failure is that some stuff might end up with an incorrect group.
3964 We track this for failures from root, since any attempt to change privilege
3965 by root should succeed and failures should be examined. For non-root,
3966 there's no security risk. For me, it's { exim -bV } on a just-built binary,
3967 no need to complain then. */
3970 if (!(unprivileged || removed_privilege))
3973 "exim: changing group failed: %s\n", strerror(errno));
3977 DEBUG(D_any) debug_printf("changing group to %ld failed: %s\n",
3978 (long int)exim_gid, strerror(errno));
3982 /* Handle a request to scan a file for malware */
3983 if (malware_test_file)
3985 #ifdef WITH_CONTENT_SCAN
3987 set_process_info("scanning file for malware");
3988 result = malware_in_file(malware_test_file);
3991 printf("No malware found.\n");
3996 printf("Malware lookup returned non-okay/fail: %d\n", result);
4000 printf("Malware found: %s\n", malware_name);
4002 printf("Malware scan detected malware of unknown name.\n");
4004 printf("Malware scanning not enabled at compile time.\n");
4009 /* Handle a request to list the delivery queue */
4013 set_process_info("listing the queue");
4014 queue_list(list_queue_option, argv + recipients_arg, argc - recipients_arg);
4018 /* Handle a request to count the delivery queue */
4022 set_process_info("counting the queue");
4027 /* Handle actions on specific messages, except for the force delivery and
4028 message load actions, which are done below. Some actions take a whole list of
4029 message ids, which are known to continue up to the end of the arguments. Others
4030 take a single message id and then operate on the recipients list. */
4032 if (msg_action_arg > 0 && msg_action != MSG_DELIVER && msg_action != MSG_LOAD)
4034 int yield = EXIT_SUCCESS;
4035 set_process_info("acting on specified messages");
4037 if (!one_msg_action)
4039 for (i = msg_action_arg; i < argc; i++)
4040 if (!queue_action(argv[i], msg_action, NULL, 0, 0))
4041 yield = EXIT_FAILURE;
4044 else if (!queue_action(argv[msg_action_arg], msg_action, argv, argc,
4045 recipients_arg)) yield = EXIT_FAILURE;
4049 /* All the modes below here require the remaining configuration sections
4050 to be read, except that we can skip over the ACL setting when delivering
4051 specific messages, or doing a queue run. (For various testing cases we could
4052 skip too, but as they are rare, it doesn't really matter.) The argument is TRUE
4055 readconf_rest(msg_action_arg > 0 || (queue_interval == 0 && !daemon_listen));
4057 /* The configuration data will have been read into POOL_PERM because we won't
4058 ever want to reset back past it. Change the current pool to POOL_MAIN. In fact,
4059 this is just a bit of pedantic tidiness. It wouldn't really matter if the
4060 configuration were read into POOL_MAIN, because we don't do any resets till
4061 later on. However, it seems right, and it does ensure that both pools get used.
4064 store_pool = POOL_MAIN;
4066 /* Handle the -brt option. This is for checking out retry configurations.
4067 The next three arguments are a domain name or a complete address, and
4068 optionally two error numbers. All it does is to call the function that
4069 scans the retry configuration data. */
4071 if (test_retry_arg >= 0)
4073 retry_config *yield;
4074 int basic_errno = 0;
4078 if (test_retry_arg >= argc)
4080 printf("-brt needs a domain or address argument\n");
4081 exim_exit(EXIT_FAILURE);
4083 s1 = argv[test_retry_arg++];
4086 /* If the first argument contains no @ and no . it might be a local user
4087 or it might be a single-component name. Treat as a domain. */
4089 if (Ustrchr(s1, '@') == NULL && Ustrchr(s1, '.') == NULL)
4091 printf("Warning: \"%s\" contains no '@' and no '.' characters. It is "
4092 "being \ntreated as a one-component domain, not as a local part.\n\n",
4096 /* There may be an optional second domain arg. */
4098 if (test_retry_arg < argc && Ustrchr(argv[test_retry_arg], '.') != NULL)
4099 s2 = argv[test_retry_arg++];
4101 /* The final arg is an error name */
4103 if (test_retry_arg < argc)
4105 uschar *ss = argv[test_retry_arg];
4107 readconf_retry_error(ss, ss + Ustrlen(ss), &basic_errno, &more_errno);
4110 printf("%s\n", CS error);
4111 return EXIT_FAILURE;
4114 /* For the {MAIL,RCPT,DATA}_4xx errors, a value of 255 means "any", and a
4115 code > 100 as an error is for matching codes to the decade. Turn them into
4116 a real error code, off the decade. */
4118 if (basic_errno == ERRNO_MAIL4XX ||
4119 basic_errno == ERRNO_RCPT4XX ||
4120 basic_errno == ERRNO_DATA4XX)
4122 int code = (more_errno >> 8) & 255;
4124 more_errno = (more_errno & 0xffff00ff) | (21 << 8);
4125 else if (code > 100)
4126 more_errno = (more_errno & 0xffff00ff) | ((code - 96) << 8);
4130 yield = retry_find_config(s1, s2, basic_errno, more_errno);
4131 if (yield == NULL) printf("No retry information found\n"); else
4134 more_errno = yield->more_errno;
4135 printf("Retry rule: %s ", yield->pattern);
4137 if (yield->basic_errno == ERRNO_EXIMQUOTA)
4139 printf("quota%s%s ",
4140 (more_errno > 0)? "_" : "",
4141 (more_errno > 0)? readconf_printtime(more_errno) : US"");
4143 else if (yield->basic_errno == ECONNREFUSED)
4145 printf("refused%s%s ",
4146 (more_errno > 0)? "_" : "",
4147 (more_errno == 'M')? "MX" :
4148 (more_errno == 'A')? "A" : "");
4150 else if (yield->basic_errno == ETIMEDOUT)
4153 if ((more_errno & RTEF_CTOUT) != 0) printf("_connect");
4155 if (more_errno != 0) printf("_%s",
4156 (more_errno == 'M')? "MX" : "A");
4159 else if (yield->basic_errno == ERRNO_AUTHFAIL)
4160 printf("auth_failed ");
4163 for (r = yield->rules; r != NULL; r = r->next)
4165 printf("%c,%s", r->rule, readconf_printtime(r->timeout)); /* Do not */
4166 printf(",%s", readconf_printtime(r->p1)); /* amalgamate */
4172 printf(",%d.", x/1000);
4186 exim_exit(EXIT_SUCCESS);
4189 /* Handle a request to list one or more configuration options */
4193 set_process_info("listing variables");
4194 if (recipients_arg >= argc) readconf_print(US"all", NULL);
4195 else for (i = recipients_arg; i < argc; i++)
4198 (Ustrcmp(argv[i], "router") == 0 ||
4199 Ustrcmp(argv[i], "transport") == 0 ||
4200 Ustrcmp(argv[i], "authenticator") == 0 ||
4201 Ustrcmp(argv[i], "macro") == 0))
4203 readconf_print(argv[i+1], argv[i]);
4206 else readconf_print(argv[i], NULL);
4208 exim_exit(EXIT_SUCCESS);
4212 /* Handle a request to deliver one or more messages that are already on the
4213 queue. Values of msg_action other than MSG_DELIVER and MSG_LOAD are dealt with
4214 above. MSG_LOAD is handled with -be (which is the only time it applies) below.
4216 Delivery of specific messages is typically used for a small number when
4217 prodding by hand (when the option forced_delivery will be set) or when
4218 re-execing to regain root privilege. Each message delivery must happen in a
4219 separate process, so we fork a process for each one, and run them sequentially
4220 so that debugging output doesn't get intertwined, and to avoid spawning too
4221 many processes if a long list is given. However, don't fork for the last one;
4222 this saves a process in the common case when Exim is called to deliver just one
4225 if (msg_action_arg > 0 && msg_action != MSG_LOAD)
4227 if (prod_requires_admin && !admin_user)
4229 fprintf(stderr, "exim: Permission denied\n");
4230 exim_exit(EXIT_FAILURE);
4232 set_process_info("delivering specified messages");
4233 if (deliver_give_up) forced_delivery = deliver_force_thaw = TRUE;
4234 for (i = msg_action_arg; i < argc; i++)
4239 (void)deliver_message(argv[i], forced_delivery, deliver_give_up);
4240 else if ((pid = fork()) == 0)
4242 (void)deliver_message(argv[i], forced_delivery, deliver_give_up);
4243 _exit(EXIT_SUCCESS);
4247 fprintf(stderr, "failed to fork delivery process for %s: %s\n", argv[i],
4249 exim_exit(EXIT_FAILURE);
4253 exim_exit(EXIT_SUCCESS);
4257 /* If only a single queue run is requested, without SMTP listening, we can just
4258 turn into a queue runner, with an optional starting message id. */
4260 if (queue_interval == 0 && !daemon_listen)
4262 DEBUG(D_queue_run) debug_printf("Single queue run%s%s%s%s\n",
4263 (start_queue_run_id == NULL)? US"" : US" starting at ",
4264 (start_queue_run_id == NULL)? US"" : start_queue_run_id,
4265 (stop_queue_run_id == NULL)? US"" : US" stopping at ",
4266 (stop_queue_run_id == NULL)? US"" : stop_queue_run_id);
4267 set_process_info("running the queue (single queue run)");
4268 queue_run(start_queue_run_id, stop_queue_run_id, FALSE);
4269 exim_exit(EXIT_SUCCESS);
4273 /* Find the login name of the real user running this process. This is always
4274 needed when receiving a message, because it is written into the spool file. It
4275 may also be used to construct a from: or a sender: header, and in this case we
4276 need the user's full name as well, so save a copy of it, checked for RFC822
4277 syntax and munged if necessary, if it hasn't previously been set by the -F
4278 argument. We may try to get the passwd entry more than once, in case NIS or
4279 other delays are in evidence. Save the home directory for use in filter testing
4284 if ((pw = getpwuid(real_uid)) != NULL)
4286 originator_login = string_copy(US pw->pw_name);
4287 originator_home = string_copy(US pw->pw_dir);
4289 /* If user name has not been set by -F, set it from the passwd entry
4290 unless -f has been used to set the sender address by a trusted user. */
4292 if (originator_name == NULL)
4294 if (sender_address == NULL ||
4295 (!trusted_caller && filter_test == FTEST_NONE))
4297 uschar *name = US pw->pw_gecos;
4298 uschar *amp = Ustrchr(name, '&');
4301 /* Most Unix specify that a '&' character in the gecos field is
4302 replaced by a copy of the login name, and some even specify that
4303 the first character should be upper cased, so that's what we do. */
4308 string_format(buffer, sizeof(buffer), "%.*s%n%s%s",
4309 amp - name, name, &loffset, originator_login, amp + 1);
4310 buffer[loffset] = toupper(buffer[loffset]);
4314 /* If a pattern for matching the gecos field was supplied, apply
4315 it and then expand the name string. */
4317 if (gecos_pattern != NULL && gecos_name != NULL)
4320 re = regex_must_compile(gecos_pattern, FALSE, TRUE); /* Use malloc */
4322 if (regex_match_and_setup(re, name, 0, -1))
4324 uschar *new_name = expand_string(gecos_name);
4326 if (new_name != NULL)
4328 DEBUG(D_receive) debug_printf("user name \"%s\" extracted from "
4329 "gecos field \"%s\"\n", new_name, name);
4332 else DEBUG(D_receive) debug_printf("failed to expand gecos_name string "
4333 "\"%s\": %s\n", gecos_name, expand_string_message);
4335 else DEBUG(D_receive) debug_printf("gecos_pattern \"%s\" did not match "
4336 "gecos field \"%s\"\n", gecos_pattern, name);
4337 store_free((void *)re);
4339 originator_name = string_copy(name);
4342 /* A trusted caller has used -f but not -F */
4344 else originator_name = US"";
4347 /* Break the retry loop */
4352 if (++i > finduser_retries) break;
4356 /* If we cannot get a user login, log the incident and give up, unless the
4357 configuration specifies something to use. When running in the test harness,
4358 any setting of unknown_login overrides the actual name. */
4360 if (originator_login == NULL || running_in_test_harness)
4362 if (unknown_login != NULL)
4364 originator_login = expand_string(unknown_login);
4365 if (originator_name == NULL && unknown_username != NULL)
4366 originator_name = expand_string(unknown_username);
4367 if (originator_name == NULL) originator_name = US"";
4369 if (originator_login == NULL)
4370 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Failed to get user name for uid %d",
4374 /* Ensure that the user name is in a suitable form for use as a "phrase" in an
4377 originator_name = string_copy(parse_fix_phrase(originator_name,
4378 Ustrlen(originator_name), big_buffer, big_buffer_size));
4380 /* If a message is created by this call of Exim, the uid/gid of its originator
4381 are those of the caller. These values are overridden if an existing message is
4382 read in from the spool. */
4384 originator_uid = real_uid;
4385 originator_gid = real_gid;
4387 DEBUG(D_receive) debug_printf("originator: uid=%d gid=%d login=%s name=%s\n",
4388 (int)originator_uid, (int)originator_gid, originator_login, originator_name);
4390 /* Run in daemon and/or queue-running mode. The function daemon_go() never
4391 returns. We leave this till here so that the originator_ fields are available
4392 for incoming messages via the daemon. The daemon cannot be run in mua_wrapper
4395 if (daemon_listen || queue_interval > 0)
4399 fprintf(stderr, "Daemon cannot be run when mua_wrapper is set\n");
4400 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Daemon cannot be run when "
4401 "mua_wrapper is set");
4406 /* If the sender ident has not been set (by a trusted caller) set it to
4407 the caller. This will get overwritten below for an inetd call. If a trusted
4408 caller has set it empty, unset it. */
4410 if (sender_ident == NULL) sender_ident = originator_login;
4411 else if (sender_ident[0] == 0) sender_ident = NULL;
4413 /* Handle the -brw option, which is for checking out rewriting rules. Cause log
4414 writes (on errors) to go to stderr instead. Can't do this earlier, as want the
4415 originator_* variables set. */
4417 if (test_rewrite_arg >= 0)
4419 really_exim = FALSE;
4420 if (test_rewrite_arg >= argc)
4422 printf("-brw needs an address argument\n");
4423 exim_exit(EXIT_FAILURE);
4425 rewrite_test(argv[test_rewrite_arg]);
4426 exim_exit(EXIT_SUCCESS);
4429 /* A locally-supplied message is considered to be coming from a local user
4430 unless a trusted caller supplies a sender address with -f, or is passing in the
4431 message via SMTP (inetd invocation or otherwise). */
4433 if ((sender_address == NULL && !smtp_input) ||
4434 (!trusted_caller && filter_test == FTEST_NONE))
4436 sender_local = TRUE;
4438 /* A trusted caller can supply authenticated_sender and authenticated_id
4439 via -oMas and -oMai and if so, they will already be set. Otherwise, force
4440 defaults except when host checking. */
4442 if (authenticated_sender == NULL && !host_checking)
4443 authenticated_sender = string_sprintf("%s@%s", originator_login,
4444 qualify_domain_sender);
4445 if (authenticated_id == NULL && !host_checking)
4446 authenticated_id = originator_login;
4449 /* Trusted callers are always permitted to specify the sender address.
4450 Untrusted callers may specify it if it matches untrusted_set_sender, or if what
4451 is specified is the empty address. However, if a trusted caller does not
4452 specify a sender address for SMTP input, we leave sender_address unset. This
4453 causes the MAIL commands to be honoured. */
4455 if ((!smtp_input && sender_address == NULL) ||
4456 !receive_check_set_sender(sender_address))
4458 /* Either the caller is not permitted to set a general sender, or this is
4459 non-SMTP input and the trusted caller has not set a sender. If there is no
4460 sender, or if a sender other than <> is set, override with the originator's
4461 login (which will get qualified below), except when checking things. */
4463 if (sender_address == NULL /* No sender_address set */
4465 (sender_address[0] != 0 && /* Non-empty sender address, AND */
4466 !checking && /* Not running tests, AND */
4467 filter_test == FTEST_NONE)) /* Not testing a filter */
4469 sender_address = originator_login;
4470 sender_address_forced = FALSE;
4471 sender_address_domain = 0;
4475 /* Remember whether an untrusted caller set the sender address */
4477 sender_set_untrusted = sender_address != originator_login && !trusted_caller;
4479 /* Ensure that the sender address is fully qualified unless it is the empty
4480 address, which indicates an error message, or doesn't exist (root caller, smtp
4481 interface, no -f argument). */
4483 if (sender_address != NULL && sender_address[0] != 0 &&
4484 sender_address_domain == 0)
4485 sender_address = string_sprintf("%s@%s", local_part_quote(sender_address),
4486 qualify_domain_sender);
4488 DEBUG(D_receive) debug_printf("sender address = %s\n", sender_address);
4490 /* Handle a request to verify a list of addresses, or test them for delivery.
4491 This must follow the setting of the sender address, since routers can be
4492 predicated upon the sender. If no arguments are given, read addresses from
4493 stdin. Set debug_level to at least D_v to get full output for address testing.
4496 if (verify_address_mode || address_test_mode)
4499 int flags = vopt_qualify;
4501 if (verify_address_mode)
4503 if (!verify_as_sender) flags |= vopt_is_recipient;
4504 DEBUG(D_verify) debug_print_ids(US"Verifying:");
4509 flags |= vopt_is_recipient;
4510 debug_selector |= D_v;
4511 debug_file = stderr;
4512 debug_fd = fileno(debug_file);
4513 DEBUG(D_verify) debug_print_ids(US"Address testing:");
4516 if (recipients_arg < argc)
4518 while (recipients_arg < argc)
4520 uschar *s = argv[recipients_arg++];
4523 BOOL finished = FALSE;
4524 uschar *ss = parse_find_address_end(s, FALSE);
4525 if (*ss == ',') *ss = 0; else finished = TRUE;
4526 test_address(s, flags, &exit_value);
4529 while (*(++s) != 0 && (*s == ',' || isspace(*s)));
4536 uschar *s = get_stdinput(NULL, NULL);
4537 if (s == NULL) break;
4538 test_address(s, flags, &exit_value);
4542 exim_exit(exit_value);
4545 /* Handle expansion checking. Either expand items on the command line, or read
4546 from stdin if there aren't any. If -Mset was specified, load the message so
4547 that its variables can be used, but restrict this facility to admin users.
4548 Otherwise, if -bem was used, read a message from stdin. */
4552 if (msg_action_arg > 0 && msg_action == MSG_LOAD)
4554 uschar spoolname[256]; /* Not big_buffer; used in spool_read_header() */
4557 fprintf(stderr, "exim: permission denied\n");
4560 message_id = argv[msg_action_arg];
4561 (void)string_format(spoolname, sizeof(spoolname), "%s-H", message_id);
4562 if (!spool_open_datafile(message_id))
4563 printf ("Failed to load message datafile %s\n", message_id);
4564 if (spool_read_header(spoolname, TRUE, FALSE) != spool_read_OK)
4565 printf ("Failed to load message %s\n", message_id);
4568 /* Read a test message from a file. We fudge it up to be on stdin, saving
4569 stdin itself for later reading of expansion strings. */
4571 else if (expansion_test_message != NULL)
4573 int save_stdin = dup(0);
4574 int fd = Uopen(expansion_test_message, O_RDONLY, 0);
4577 fprintf(stderr, "exim: failed to open %s: %s\n", expansion_test_message,
4579 return EXIT_FAILURE;
4582 filter_test = FTEST_USER; /* Fudge to make it look like filter test */
4583 message_ended = END_NOTENDED;
4584 read_message_body(receive_msg(extract_recipients));
4585 message_linecount += body_linecount;
4586 (void)dup2(save_stdin, 0);
4587 (void)close(save_stdin);
4588 clearerr(stdin); /* Required by Darwin */
4591 /* Allow $recipients for this testing */
4593 enable_dollar_recipients = TRUE;
4595 /* Expand command line items */
4597 if (recipients_arg < argc)
4599 while (recipients_arg < argc)
4601 uschar *s = argv[recipients_arg++];
4602 uschar *ss = expand_string(s);
4603 if (ss == NULL) printf ("Failed: %s\n", expand_string_message);
4604 else printf("%s\n", CS ss);
4612 char *(*fn_readline)(const char *) = NULL;
4613 void (*fn_addhist)(const char *) = NULL;
4616 void *dlhandle = set_readline(&fn_readline, &fn_addhist);
4622 uschar *source = get_stdinput(fn_readline, fn_addhist);
4623 if (source == NULL) break;
4624 ss = expand_string(source);
4626 printf ("Failed: %s\n", expand_string_message);
4627 else printf("%s\n", CS ss);
4631 if (dlhandle != NULL) dlclose(dlhandle);
4635 /* The data file will be open after -Mset */
4637 if (deliver_datafile >= 0)
4639 (void)close(deliver_datafile);
4640 deliver_datafile = -1;
4643 exim_exit(EXIT_SUCCESS);
4647 /* The active host name is normally the primary host name, but it can be varied
4648 for hosts that want to play several parts at once. We need to ensure that it is
4649 set for host checking, and for receiving messages. */
4651 smtp_active_hostname = primary_hostname;
4652 if (raw_active_hostname != NULL)
4654 uschar *nah = expand_string(raw_active_hostname);
4657 if (!expand_string_forcedfail)
4658 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to expand \"%s\" "
4659 "(smtp_active_hostname): %s", raw_active_hostname,
4660 expand_string_message);
4662 else if (nah[0] != 0) smtp_active_hostname = nah;
4665 /* Handle host checking: this facility mocks up an incoming SMTP call from a
4666 given IP address so that the blocking and relay configuration can be tested.
4667 Unless a sender_ident was set by -oMt, we discard it (the default is the
4668 caller's login name). An RFC 1413 call is made only if we are running in the
4669 test harness and an incoming interface and both ports are specified, because
4670 there is no TCP/IP call to find the ident for. */
4677 if (!sender_ident_set)
4679 sender_ident = NULL;
4680 if (running_in_test_harness && sender_host_port != 0 &&
4681 interface_address != NULL && interface_port != 0)
4682 verify_get_ident(1413);
4685 /* In case the given address is a non-canonical IPv6 address, canonicize
4686 it. The code works for both IPv4 and IPv6, as it happens. */
4688 size = host_aton(sender_host_address, x);
4689 sender_host_address = store_get(48); /* large enough for full IPv6 */
4690 (void)host_nmtoa(size, x, -1, sender_host_address, ':');
4692 /* Now set up for testing */
4694 host_build_sender_fullhost();
4698 sender_local = FALSE;
4699 sender_host_notsocket = TRUE;
4700 debug_file = stderr;
4701 debug_fd = fileno(debug_file);
4702 fprintf(stdout, "\n**** SMTP testing session as if from host %s\n"
4703 "**** but without any ident (RFC 1413) callback.\n"
4704 "**** This is not for real!\n\n",
4705 sender_host_address);
4707 if (verify_check_host(&hosts_connection_nolog) == OK)
4708 log_write_selector &= ~L_smtp_connection;
4709 log_write(L_smtp_connection, LOG_MAIN, "%s", smtp_get_connection_info());
4711 /* NOTE: We do *not* call smtp_log_no_mail() if smtp_start_session() fails,
4712 because a log line has already been written for all its failure exists
4713 (usually "connection refused: <reason>") and writing another one is
4714 unnecessary clutter. */
4716 if (smtp_start_session())
4718 reset_point = store_get(0);
4721 store_reset(reset_point);
4722 if (smtp_setup_msg() <= 0) break;
4723 if (!receive_msg(FALSE)) break;
4727 exim_exit(EXIT_SUCCESS);
4731 /* Arrange for message reception if recipients or SMTP were specified;
4732 otherwise complain unless a version print (-bV) happened or this is a filter
4733 verification test. In the former case, show the configuration file name. */
4735 if (recipients_arg >= argc && !extract_recipients && !smtp_input)
4737 if (version_printed)
4739 printf("Configuration file is %s\n", config_main_filename);
4740 return EXIT_SUCCESS;
4743 if (filter_test == FTEST_NONE)
4744 exim_usage(called_as);
4748 /* If mua_wrapper is set, Exim is being used to turn an MUA that submits on the
4749 standard input into an MUA that submits to a smarthost over TCP/IP. We know
4750 that we are not called from inetd, because that is rejected above. The
4751 following configuration settings are forced here:
4753 (1) Synchronous delivery (-odi)
4754 (2) Errors to stderr (-oep == -oeq)
4755 (3) No parallel remote delivery
4756 (4) Unprivileged delivery
4758 We don't force overall queueing options because there are several of them;
4759 instead, queueing is avoided below when mua_wrapper is set. However, we do need
4760 to override any SMTP queueing. */
4764 synchronous_delivery = TRUE;
4765 arg_error_handling = ERRORS_STDERR;
4766 remote_max_parallel = 1;
4767 deliver_drop_privilege = TRUE;
4769 queue_smtp_domains = NULL;
4773 /* Prepare to accept one or more new messages on the standard input. When a
4774 message has been read, its id is returned in message_id[]. If doing immediate
4775 delivery, we fork a delivery process for each received message, except for the
4776 last one, where we can save a process switch.
4778 It is only in non-smtp mode that error_handling is allowed to be changed from
4779 its default of ERRORS_SENDER by argument. (Idle thought: are any of the
4780 sendmail error modes other than -oem ever actually used? Later: yes.) */
4782 if (!smtp_input) error_handling = arg_error_handling;
4784 /* If this is an inetd call, ensure that stderr is closed to prevent panic
4785 logging being sent down the socket and make an identd call to get the
4790 (void)fclose(stderr);
4791 exim_nullstd(); /* Re-open to /dev/null */
4792 verify_get_ident(IDENT_PORT);
4793 host_build_sender_fullhost();
4794 set_process_info("handling incoming connection from %s via inetd",
4798 /* If the sender host address has been set, build sender_fullhost if it hasn't
4799 already been done (which it will have been for inetd). This caters for the
4800 case when it is forced by -oMa. However, we must flag that it isn't a socket,
4801 so that the test for IP options is skipped for -bs input. */
4803 if (sender_host_address != NULL && sender_fullhost == NULL)
4805 host_build_sender_fullhost();
4806 set_process_info("handling incoming connection from %s via -oMa",
4808 sender_host_notsocket = TRUE;
4811 /* Otherwise, set the sender host as unknown except for inetd calls. This
4812 prevents host checking in the case of -bs not from inetd and also for -bS. */
4814 else if (!is_inetd) sender_host_unknown = TRUE;
4816 /* If stdout does not exist, then dup stdin to stdout. This can happen
4817 if exim is started from inetd. In this case fd 0 will be set to the socket,
4818 but fd 1 will not be set. This also happens for passed SMTP channels. */
4820 if (fstat(1, &statbuf) < 0) (void)dup2(0, 1);
4822 /* Set up the incoming protocol name and the state of the program. Root is
4823 allowed to force received protocol via the -oMr option above. If we have come
4824 via inetd, the process info has already been set up. We don't set
4825 received_protocol here for smtp input, as it varies according to
4826 batch/HELO/EHLO/AUTH/TLS. */
4830 if (!is_inetd) set_process_info("accepting a local %sSMTP message from <%s>",
4831 smtp_batched_input? "batched " : "",
4832 (sender_address!= NULL)? sender_address : originator_login);
4836 if (received_protocol == NULL)
4837 received_protocol = string_sprintf("local%s", called_as);
4838 set_process_info("accepting a local non-SMTP message from <%s>",
4842 /* Initialize the session_local_queue-only flag (this will be ignored if
4843 mua_wrapper is set) */
4846 session_local_queue_only = queue_only;
4848 /* For non-SMTP and for batched SMTP input, check that there is enough space on
4849 the spool if so configured. On failure, we must not attempt to send an error
4850 message! (For interactive SMTP, the check happens at MAIL FROM and an SMTP
4851 error code is given.) */
4853 if ((!smtp_input || smtp_batched_input) && !receive_check_fs(0))
4855 fprintf(stderr, "exim: insufficient disk space\n");
4856 return EXIT_FAILURE;
4859 /* If this is smtp input of any kind, real or batched, handle the start of the
4862 NOTE: We do *not* call smtp_log_no_mail() if smtp_start_session() fails,
4863 because a log line has already been written for all its failure exists
4864 (usually "connection refused: <reason>") and writing another one is
4865 unnecessary clutter. */
4871 if (verify_check_host(&hosts_connection_nolog) == OK)
4872 log_write_selector &= ~L_smtp_connection;
4873 log_write(L_smtp_connection, LOG_MAIN, "%s", smtp_get_connection_info());
4874 if (!smtp_start_session())
4877 exim_exit(EXIT_SUCCESS);
4881 /* Otherwise, set up the input size limit here. */
4885 thismessage_size_limit = expand_string_integer(message_size_limit, TRUE);
4886 if (expand_string_message != NULL)
4888 if (thismessage_size_limit == -1)
4889 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to expand "
4890 "message_size_limit: %s", expand_string_message);
4892 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "invalid value for "
4893 "message_size_limit: %s", expand_string_message);
4897 /* Loop for several messages when reading SMTP input. If we fork any child
4898 processes, we don't want to wait for them unless synchronous delivery is
4899 requested, so set SIGCHLD to SIG_IGN in that case. This is not necessarily the
4900 same as SIG_DFL, despite the fact that documentation often lists the default as
4901 "ignore". This is a confusing area. This is what I know:
4903 At least on some systems (e.g. Solaris), just setting SIG_IGN causes child
4904 processes that complete simply to go away without ever becoming defunct. You
4905 can't then wait for them - but we don't want to wait for them in the
4906 non-synchronous delivery case. However, this behaviour of SIG_IGN doesn't
4907 happen for all OS (e.g. *BSD is different).
4909 But that's not the end of the story. Some (many? all?) systems have the
4910 SA_NOCLDWAIT option for sigaction(). This requests the behaviour that Solaris
4911 has by default, so it seems that the difference is merely one of default
4912 (compare restarting vs non-restarting signals).
4914 To cover all cases, Exim sets SIG_IGN with SA_NOCLDWAIT here if it can. If not,
4915 it just sets SIG_IGN. To be on the safe side it also calls waitpid() at the end
4916 of the loop below. Paranoia rules.
4918 February 2003: That's *still* not the end of the story. There are now versions
4919 of Linux (where SIG_IGN does work) that are picky. If, having set SIG_IGN, a
4920 process then calls waitpid(), a grumble is written to the system log, because
4921 this is logically inconsistent. In other words, it doesn't like the paranoia.
4922 As a consequenc of this, the waitpid() below is now excluded if we are sure
4923 that SIG_IGN works. */
4925 if (!synchronous_delivery)
4928 struct sigaction act;
4929 act.sa_handler = SIG_IGN;
4930 sigemptyset(&(act.sa_mask));
4931 act.sa_flags = SA_NOCLDWAIT;
4932 sigaction(SIGCHLD, &act, NULL);
4934 signal(SIGCHLD, SIG_IGN);
4938 /* Save the current store pool point, for resetting at the start of
4939 each message, and save the real sender address, if any. */
4941 reset_point = store_get(0);
4942 real_sender_address = sender_address;
4944 /* Loop to receive messages; receive_msg() returns TRUE if there are more
4945 messages to be read (SMTP input), or FALSE otherwise (not SMTP, or SMTP channel
4950 store_reset(reset_point);
4953 /* Handle the SMTP case; call smtp_setup_mst() to deal with the initial SMTP
4954 input and build the recipients list, before calling receive_msg() to read the
4955 message proper. Whatever sender address is given in the SMTP transaction is
4956 often ignored for local senders - we use the actual sender, which is normally
4957 either the underlying user running this process or a -f argument provided by
4958 a trusted caller. It is saved in real_sender_address. The test for whether to
4959 accept the SMTP sender is encapsulated in receive_check_set_sender(). */
4964 if ((rc = smtp_setup_msg()) > 0)
4966 if (real_sender_address != NULL &&
4967 !receive_check_set_sender(sender_address))
4969 sender_address = raw_sender = real_sender_address;
4970 sender_address_unrewritten = NULL;
4973 /* For batched SMTP, we have to run the acl_not_smtp_start ACL, since it
4974 isn't really SMTP, so no other ACL will run until the acl_not_smtp one at
4975 the very end. The result of the ACL is ignored (as for other non-SMTP
4976 messages). It is run for its potential side effects. */
4978 if (smtp_batched_input && acl_not_smtp_start != NULL)
4980 uschar *user_msg, *log_msg;
4981 enable_dollar_recipients = TRUE;
4982 (void)acl_check(ACL_WHERE_NOTSMTP_START, NULL, acl_not_smtp_start,
4983 &user_msg, &log_msg);
4984 enable_dollar_recipients = FALSE;
4987 /* Now get the data for the message */
4989 more = receive_msg(extract_recipients);
4990 if (message_id[0] == 0)
4993 smtp_log_no_mail(); /* Log no mail if configured */
4994 exim_exit(EXIT_FAILURE);
4999 smtp_log_no_mail(); /* Log no mail if configured */
5000 exim_exit((rc == 0)? EXIT_SUCCESS : EXIT_FAILURE);
5004 /* In the non-SMTP case, we have all the information from the command
5005 line, but must process it in case it is in the more general RFC822
5006 format, and in any case, to detect syntax errors. Also, it appears that
5007 the use of comma-separated lists as single arguments is common, so we
5008 had better support them. */
5014 int count = argc - recipients_arg;
5015 uschar **list = argv + recipients_arg;
5017 /* These options cannot be changed dynamically for non-SMTP messages */
5019 active_local_sender_retain = local_sender_retain;
5020 active_local_from_check = local_from_check;
5022 /* Save before any rewriting */
5024 raw_sender = string_copy(sender_address);
5026 /* Loop for each argument */
5028 for (i = 0; i < count; i++)
5030 int start, end, domain;
5032 uschar *s = list[i];
5034 /* Loop for each comma-separated address */
5038 BOOL finished = FALSE;
5040 uschar *ss = parse_find_address_end(s, FALSE);
5042 if (*ss == ',') *ss = 0; else finished = TRUE;
5044 /* Check max recipients - if -t was used, these aren't recipients */
5046 if (recipients_max > 0 && ++rcount > recipients_max &&
5047 !extract_recipients)
5049 if (error_handling == ERRORS_STDERR)
5051 fprintf(stderr, "exim: too many recipients\n");
5052 exim_exit(EXIT_FAILURE);
5057 moan_to_sender(ERRMESS_TOOMANYRECIP, NULL, NULL, stdin, TRUE)?
5058 errors_sender_rc : EXIT_FAILURE;
5063 parse_extract_address(s, &errmess, &start, &end, &domain, FALSE);
5065 if (domain == 0 && !allow_unqualified_recipient)
5068 errmess = US"unqualified recipient address not allowed";
5071 if (recipient == NULL)
5073 if (error_handling == ERRORS_STDERR)
5075 fprintf(stderr, "exim: bad recipient address \"%s\": %s\n",
5076 string_printing(list[i]), errmess);
5077 exim_exit(EXIT_FAILURE);
5083 eblock.text1 = string_printing(list[i]);
5084 eblock.text2 = errmess;
5086 moan_to_sender(ERRMESS_BADARGADDRESS, &eblock, NULL, stdin, TRUE)?
5087 errors_sender_rc : EXIT_FAILURE;
5091 receive_add_recipient(recipient, -1);
5094 while (*(++s) != 0 && (*s == ',' || isspace(*s)));
5098 /* Show the recipients when debugging */
5103 if (sender_address != NULL) debug_printf("Sender: %s\n", sender_address);
5104 if (recipients_list != NULL)
5106 debug_printf("Recipients:\n");
5107 for (i = 0; i < recipients_count; i++)
5108 debug_printf(" %s\n", recipients_list[i].address);
5112 /* Run the acl_not_smtp_start ACL if required. The result of the ACL is
5113 ignored; rejecting here would just add complication, and it can just as
5114 well be done later. Allow $recipients to be visible in the ACL. */
5116 if (acl_not_smtp_start != NULL)
5118 uschar *user_msg, *log_msg;
5119 enable_dollar_recipients = TRUE;
5120 (void)acl_check(ACL_WHERE_NOTSMTP_START, NULL, acl_not_smtp_start,
5121 &user_msg, &log_msg);
5122 enable_dollar_recipients = FALSE;
5125 /* Read the data for the message. If filter_test is not FTEST_NONE, this
5126 will just read the headers for the message, and not write anything onto the
5129 message_ended = END_NOTENDED;
5130 more = receive_msg(extract_recipients);
5132 /* more is always FALSE here (not SMTP message) when reading a message
5133 for real; when reading the headers of a message for filter testing,
5134 it is TRUE if the headers were terminated by '.' and FALSE otherwise. */
5136 if (message_id[0] == 0) exim_exit(EXIT_FAILURE);
5137 } /* Non-SMTP message reception */
5139 /* If this is a filter testing run, there are headers in store, but
5140 no message on the spool. Run the filtering code in testing mode, setting
5141 the domain to the qualify domain and the local part to the current user,
5142 unless they have been set by options. The prefix and suffix are left unset
5143 unless specified. The the return path is set to to the sender unless it has
5144 already been set from a return-path header in the message. */
5146 if (filter_test != FTEST_NONE)
5148 deliver_domain = (ftest_domain != NULL)?
5149 ftest_domain : qualify_domain_recipient;
5150 deliver_domain_orig = deliver_domain;
5151 deliver_localpart = (ftest_localpart != NULL)?
5152 ftest_localpart : originator_login;
5153 deliver_localpart_orig = deliver_localpart;
5154 deliver_localpart_prefix = ftest_prefix;
5155 deliver_localpart_suffix = ftest_suffix;
5156 deliver_home = originator_home;
5158 if (return_path == NULL)
5160 printf("Return-path copied from sender\n");
5161 return_path = string_copy(sender_address);
5165 printf("Return-path = %s\n", (return_path[0] == 0)? US"<>" : return_path);
5167 printf("Sender = %s\n", (sender_address[0] == 0)? US"<>" : sender_address);
5169 receive_add_recipient(
5170 string_sprintf("%s%s%s@%s",
5171 (ftest_prefix == NULL)? US"" : ftest_prefix,
5173 (ftest_suffix == NULL)? US"" : ftest_suffix,
5174 deliver_domain), -1);
5176 printf("Recipient = %s\n", recipients_list[0].address);
5177 if (ftest_prefix != NULL) printf("Prefix = %s\n", ftest_prefix);
5178 if (ftest_suffix != NULL) printf("Suffix = %s\n", ftest_suffix);
5180 (void)chdir("/"); /* Get away from wherever the user is running this from */
5182 /* Now we run either a system filter test, or a user filter test, or both.
5183 In the latter case, headers added by the system filter will persist and be
5184 available to the user filter. We need to copy the filter variables
5187 if ((filter_test & FTEST_SYSTEM) != 0)
5189 if (!filter_runtest(filter_sfd, filter_test_sfile, TRUE, more))
5190 exim_exit(EXIT_FAILURE);
5193 memcpy(filter_sn, filter_n, sizeof(filter_sn));
5195 if ((filter_test & FTEST_USER) != 0)
5197 if (!filter_runtest(filter_ufd, filter_test_ufile, FALSE, more))
5198 exim_exit(EXIT_FAILURE);
5201 exim_exit(EXIT_SUCCESS);
5204 /* Else act on the result of message reception. We should not get here unless
5205 message_id[0] is non-zero. If queue_only is set, session_local_queue_only
5206 will be TRUE. If it is not, check on the number of messages received in this
5209 if (!session_local_queue_only &&
5210 smtp_accept_queue_per_connection > 0 &&
5211 receive_messagecount > smtp_accept_queue_per_connection)
5213 session_local_queue_only = TRUE;
5214 queue_only_reason = 2;
5217 /* Initialize local_queue_only from session_local_queue_only. If it is false,
5218 and queue_only_load is set, check that the load average is below it. If it is
5219 not, set local_queue_only TRUE. If queue_only_load_latch is true (the
5220 default), we put the whole session into queue_only mode. It then remains this
5221 way for any subsequent messages on the same SMTP connection. This is a
5222 deliberate choice; even though the load average may fall, it doesn't seem
5223 right to deliver later messages on the same call when not delivering earlier
5224 ones. However, there are odd cases where this is not wanted, so this can be
5225 changed by setting queue_only_load_latch false. */
5227 local_queue_only = session_local_queue_only;
5228 if (!local_queue_only && queue_only_load >= 0)
5230 local_queue_only = (load_average = OS_GETLOADAVG()) > queue_only_load;
5231 if (local_queue_only)
5233 queue_only_reason = 3;
5234 if (queue_only_load_latch) session_local_queue_only = TRUE;
5238 /* If running as an MUA wrapper, all queueing options and freezing options
5242 local_queue_only = queue_only_policy = deliver_freeze = FALSE;
5244 /* Log the queueing here, when it will get a message id attached, but
5245 not if queue_only is set (case 0). Case 1 doesn't happen here (too many
5248 if (local_queue_only) switch(queue_only_reason)
5251 log_write(L_delay_delivery,
5252 LOG_MAIN, "no immediate delivery: more than %d messages "
5253 "received in one connection", smtp_accept_queue_per_connection);
5257 log_write(L_delay_delivery,
5258 LOG_MAIN, "no immediate delivery: load average %.2f",
5259 (double)load_average/1000.0);
5263 /* Else do the delivery unless the ACL or local_scan() called for queue only
5264 or froze the message. Always deliver in a separate process. A fork failure is
5265 not a disaster, as the delivery will eventually happen on a subsequent queue
5266 run. The search cache must be tidied before the fork, as the parent will
5267 do it before exiting. The child will trigger a lookup failure and
5268 thereby defer the delivery if it tries to use (for example) a cached ldap
5269 connection that the parent has called unbind on. */
5271 else if (!queue_only_policy && !deliver_freeze)
5276 if ((pid = fork()) == 0)
5279 close_unwanted(); /* Close unwanted file descriptors and TLS */
5280 exim_nullstd(); /* Ensure std{in,out,err} exist */
5282 /* Re-exec Exim if we need to regain privilege (note: in mua_wrapper
5283 mode, deliver_drop_privilege is forced TRUE). */
5285 if (geteuid() != root_uid && !deliver_drop_privilege && !unprivileged)
5287 (void)child_exec_exim(CEE_EXEC_EXIT, FALSE, NULL, FALSE, 2, US"-Mc",
5289 /* Control does not return here. */
5292 /* No need to re-exec */
5294 rc = deliver_message(message_id, FALSE, FALSE);
5296 _exit((!mua_wrapper || rc == DELIVER_MUA_SUCCEEDED)?
5297 EXIT_SUCCESS : EXIT_FAILURE);
5302 log_write(0, LOG_MAIN|LOG_PANIC, "failed to fork automatic delivery "
5303 "process: %s", strerror(errno));
5306 /* In the parent, wait if synchronous delivery is required. This will
5307 always be the case in MUA wrapper mode. */
5309 else if (synchronous_delivery)
5312 while (wait(&status) != pid);
5313 if ((status & 0x00ff) != 0)
5314 log_write(0, LOG_MAIN|LOG_PANIC,
5315 "process %d crashed with signal %d while delivering %s",
5316 (int)pid, status & 0x00ff, message_id);
5317 if (mua_wrapper && (status & 0xffff) != 0) exim_exit(EXIT_FAILURE);
5321 /* The loop will repeat if more is TRUE. If we do not know know that the OS
5322 automatically reaps children (see comments above the loop), clear away any
5323 finished subprocesses here, in case there are lots of messages coming in
5324 from the same source. */
5326 #ifndef SIG_IGN_WORKS
5327 while (waitpid(-1, NULL, WNOHANG) > 0);
5331 exim_exit(EXIT_SUCCESS); /* Never returns */
5332 return 0; /* To stop compiler warning */