1 /* $Cambridge: exim/src/src/exim.c,v 1.71 2010/06/07 00:12:42 pdp Exp $ */
3 /*************************************************
4 * Exim - an Internet mail transport agent *
5 *************************************************/
7 /* Copyright (c) University of Cambridge 1995 - 2009 */
8 /* See the file NOTICE for conditions of use and distribution. */
11 /* The main function: entry point, initialization, and high-level control.
12 Also a few functions that don't naturally fit elsewhere. */
17 extern void init_lookup_list(void);
21 /*************************************************
22 * Function interface to store functions *
23 *************************************************/
25 /* We need some real functions to pass to the PCRE regular expression library
26 for store allocation via Exim's store manager. The normal calls are actually
27 macros that pass over location information to make tracing easier. These
28 functions just interface to the standard macro calls. A good compiler will
29 optimize out the tail recursion and so not make them too expensive. There
30 are two sets of functions; one for use when we want to retain the compiled
31 regular expression for a long time; the other for short-term use. */
34 function_store_get(size_t size)
36 return store_get((int)size);
40 function_dummy_free(void *block) { block = block; }
43 function_store_malloc(size_t size)
45 return store_malloc((int)size);
49 function_store_free(void *block)
57 /*************************************************
58 * Compile regular expression and panic on fail *
59 *************************************************/
61 /* This function is called when failure to compile a regular expression leads
62 to a panic exit. In other cases, pcre_compile() is called directly. In many
63 cases where this function is used, the results of the compilation are to be
64 placed in long-lived store, so we temporarily reset the store management
65 functions that PCRE uses if the use_malloc flag is set.
68 pattern the pattern to compile
69 caseless TRUE if caseless matching is required
70 use_malloc TRUE if compile into malloc store
72 Returns: pointer to the compiled pattern
76 regex_must_compile(uschar *pattern, BOOL caseless, BOOL use_malloc)
79 int options = PCRE_COPT;
84 pcre_malloc = function_store_malloc;
85 pcre_free = function_store_free;
87 if (caseless) options |= PCRE_CASELESS;
88 yield = pcre_compile(CS pattern, options, (const char **)&error, &offset, NULL);
89 pcre_malloc = function_store_get;
90 pcre_free = function_dummy_free;
92 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "regular expression error: "
93 "%s at offset %d while compiling %s", error, offset, pattern);
100 /*************************************************
101 * Execute regular expression and set strings *
102 *************************************************/
104 /* This function runs a regular expression match, and sets up the pointers to
105 the matched substrings.
108 re the compiled expression
109 subject the subject string
110 options additional PCRE options
111 setup if < 0 do full setup
112 if >= 0 setup from setup+1 onwards,
113 excluding the full matched string
115 Returns: TRUE or FALSE
119 regex_match_and_setup(const pcre *re, uschar *subject, int options, int setup)
121 int ovector[3*(EXPAND_MAXN+1)];
122 int n = pcre_exec(re, NULL, CS subject, Ustrlen(subject), 0,
123 PCRE_EOPT | options, ovector, sizeof(ovector)/sizeof(int));
125 if (n == 0) n = EXPAND_MAXN + 1;
129 expand_nmax = (setup < 0)? 0 : setup + 1;
130 for (nn = (setup < 0)? 0 : 2; nn < n*2; nn += 2)
132 expand_nstring[expand_nmax] = subject + ovector[nn];
133 expand_nlength[expand_nmax++] = ovector[nn+1] - ovector[nn];
143 /*************************************************
144 * Handler for SIGUSR1 *
145 *************************************************/
147 /* SIGUSR1 causes any exim process to write to the process log details of
148 what it is currently doing. It will only be used if the OS is capable of
149 setting up a handler that causes automatic restarting of any system call
150 that is in progress at the time.
152 Argument: the signal number (SIGUSR1)
157 usr1_handler(int sig)
159 sig = sig; /* Keep picky compilers happy */
160 log_write(0, LOG_PROCESS, "%s", process_info);
162 os_restarting_signal(SIGUSR1, usr1_handler);
167 /*************************************************
169 *************************************************/
171 /* This handler is enabled most of the time that Exim is running. The handler
172 doesn't actually get used unless alarm() has been called to set a timer, to
173 place a time limit on a system call of some kind. When the handler is run, it
176 There are some other SIGALRM handlers that are used in special cases when more
177 than just a flag setting is required; for example, when reading a message's
178 input. These are normally set up in the code module that uses them, and the
179 SIGALRM handler is reset to this one afterwards.
181 Argument: the signal value (SIGALRM)
186 sigalrm_handler(int sig)
188 sig = sig; /* Keep picky compilers happy */
190 os_non_restarting_signal(SIGALRM, sigalrm_handler);
195 /*************************************************
196 * Sleep for a fractional time interval *
197 *************************************************/
199 /* This function is called by millisleep() and exim_wait_tick() to wait for a
200 period of time that may include a fraction of a second. The coding is somewhat
201 tedious. We do not expect setitimer() ever to fail, but if it does, the process
202 will wait for ever, so we panic in this instance. (There was a case of this
203 when a bug in a function that calls milliwait() caused it to pass invalid data.
204 That's when I added the check. :-)
206 Argument: an itimerval structure containing the interval
211 milliwait(struct itimerval *itval)
214 sigset_t old_sigmask;
215 (void)sigemptyset(&sigmask); /* Empty mask */
216 (void)sigaddset(&sigmask, SIGALRM); /* Add SIGALRM */
217 (void)sigprocmask(SIG_BLOCK, &sigmask, &old_sigmask); /* Block SIGALRM */
218 if (setitimer(ITIMER_REAL, itval, NULL) < 0) /* Start timer */
219 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
220 "setitimer() failed: %s", strerror(errno));
221 (void)sigfillset(&sigmask); /* All signals */
222 (void)sigdelset(&sigmask, SIGALRM); /* Remove SIGALRM */
223 (void)sigsuspend(&sigmask); /* Until SIGALRM */
224 (void)sigprocmask(SIG_SETMASK, &old_sigmask, NULL); /* Restore mask */
230 /*************************************************
231 * Millisecond sleep function *
232 *************************************************/
234 /* The basic sleep() function has a granularity of 1 second, which is too rough
235 in some cases - for example, when using an increasing delay to slow down
238 Argument: number of millseconds
245 struct itimerval itval;
246 itval.it_interval.tv_sec = 0;
247 itval.it_interval.tv_usec = 0;
248 itval.it_value.tv_sec = msec/1000;
249 itval.it_value.tv_usec = (msec % 1000) * 1000;
255 /*************************************************
256 * Compare microsecond times *
257 *************************************************/
264 Returns: -1, 0, or +1
268 exim_tvcmp(struct timeval *t1, struct timeval *t2)
270 if (t1->tv_sec > t2->tv_sec) return +1;
271 if (t1->tv_sec < t2->tv_sec) return -1;
272 if (t1->tv_usec > t2->tv_usec) return +1;
273 if (t1->tv_usec < t2->tv_usec) return -1;
280 /*************************************************
281 * Clock tick wait function *
282 *************************************************/
284 /* Exim uses a time + a pid to generate a unique identifier in two places: its
285 message IDs, and in file names for maildir deliveries. Because some OS now
286 re-use pids within the same second, sub-second times are now being used.
287 However, for absolute certaintly, we must ensure the clock has ticked before
288 allowing the relevant process to complete. At the time of implementation of
289 this code (February 2003), the speed of processors is such that the clock will
290 invariably have ticked already by the time a process has done its job. This
291 function prepares for the time when things are faster - and it also copes with
292 clocks that go backwards.
295 then_tv A timeval which was used to create uniqueness; its usec field
296 has been rounded down to the value of the resolution.
297 We want to be sure the current time is greater than this.
298 resolution The resolution that was used to divide the microseconds
299 (1 for maildir, larger for message ids)
305 exim_wait_tick(struct timeval *then_tv, int resolution)
307 struct timeval now_tv;
308 long int now_true_usec;
310 (void)gettimeofday(&now_tv, NULL);
311 now_true_usec = now_tv.tv_usec;
312 now_tv.tv_usec = (now_true_usec/resolution) * resolution;
314 if (exim_tvcmp(&now_tv, then_tv) <= 0)
316 struct itimerval itval;
317 itval.it_interval.tv_sec = 0;
318 itval.it_interval.tv_usec = 0;
319 itval.it_value.tv_sec = then_tv->tv_sec - now_tv.tv_sec;
320 itval.it_value.tv_usec = then_tv->tv_usec + resolution - now_true_usec;
322 /* We know that, overall, "now" is less than or equal to "then". Therefore, a
323 negative value for the microseconds is possible only in the case when "now"
324 is more than a second less than "then". That means that itval.it_value.tv_sec
325 is greater than zero. The following correction is therefore safe. */
327 if (itval.it_value.tv_usec < 0)
329 itval.it_value.tv_usec += 1000000;
330 itval.it_value.tv_sec -= 1;
333 DEBUG(D_transport|D_receive)
335 if (!running_in_test_harness)
337 debug_printf("tick check: %lu.%06lu %lu.%06lu\n",
338 then_tv->tv_sec, then_tv->tv_usec, now_tv.tv_sec, now_tv.tv_usec);
339 debug_printf("waiting %lu.%06lu\n", itval.it_value.tv_sec,
340 itval.it_value.tv_usec);
351 /*************************************************
352 * Set up processing details *
353 *************************************************/
355 /* Save a text string for dumping when SIGUSR1 is received.
356 Do checks for overruns.
358 Arguments: format and arguments, as for printf()
363 set_process_info(char *format, ...)
367 sprintf(CS process_info, "%5d ", (int)getpid());
368 len = Ustrlen(process_info);
369 va_start(ap, format);
370 if (!string_vformat(process_info + len, PROCESS_INFO_SIZE - len, format, ap))
371 Ustrcpy(process_info + len, "**** string overflowed buffer ****");
372 DEBUG(D_process_info) debug_printf("set_process_info: %s\n", process_info);
380 /*************************************************
381 * Call fopen() with umask 777 and adjust mode *
382 *************************************************/
384 /* Exim runs with umask(0) so that files created with open() have the mode that
385 is specified in the open() call. However, there are some files, typically in
386 the spool directory, that are created with fopen(). They end up world-writeable
387 if no precautions are taken. Although the spool directory is not accessible to
388 the world, this is an untidiness. So this is a wrapper function for fopen()
389 that sorts out the mode of the created file.
392 filename the file name
393 options the fopen() options
394 mode the required mode
396 Returns: the fopened FILE or NULL
400 modefopen(uschar *filename, char *options, mode_t mode)
402 mode_t saved_umask = umask(0777);
403 FILE *f = Ufopen(filename, options);
404 (void)umask(saved_umask);
405 if (f != NULL) (void)fchmod(fileno(f), mode);
412 /*************************************************
413 * Ensure stdin, stdout, and stderr exist *
414 *************************************************/
416 /* Some operating systems grumble if an exec() happens without a standard
417 input, output, and error (fds 0, 1, 2) being defined. The worry is that some
418 file will be opened and will use these fd values, and then some other bit of
419 code will assume, for example, that it can write error messages to stderr.
420 This function ensures that fds 0, 1, and 2 are open if they do not already
421 exist, by connecting them to /dev/null.
423 This function is also used to ensure that std{in,out,err} exist at all times,
424 so that if any library that Exim calls tries to use them, it doesn't crash.
436 for (i = 0; i <= 2; i++)
438 if (fstat(i, &statbuf) < 0 && errno == EBADF)
440 if (devnull < 0) devnull = open("/dev/null", O_RDWR);
441 if (devnull < 0) log_write(0, LOG_MAIN|LOG_PANIC_DIE, "%s",
442 string_open_failed(errno, "/dev/null"));
443 if (devnull != i) (void)dup2(devnull, i);
446 if (devnull > 2) (void)close(devnull);
452 /*************************************************
453 * Close unwanted file descriptors for delivery *
454 *************************************************/
456 /* This function is called from a new process that has been forked to deliver
457 an incoming message, either directly, or using exec.
459 We want any smtp input streams to be closed in this new process. However, it
460 has been observed that using fclose() here causes trouble. When reading in -bS
461 input, duplicate copies of messages have been seen. The files will be sharing a
462 file pointer with the parent process, and it seems that fclose() (at least on
463 some systems - I saw this on Solaris 2.5.1) messes with that file pointer, at
464 least sometimes. Hence we go for closing the underlying file descriptors.
466 If TLS is active, we want to shut down the TLS library, but without molesting
467 the parent's SSL connection.
469 For delivery of a non-SMTP message, we want to close stdin and stdout (and
470 stderr unless debugging) because the calling process might have set them up as
471 pipes and be waiting for them to close before it waits for the submission
472 process to terminate. If they aren't closed, they hold up the calling process
473 until the initial delivery process finishes, which is not what we want.
475 Exception: We do want it for synchronous delivery!
477 And notwithstanding all the above, if D_resolver is set, implying resolver
478 debugging, leave stdout open, because that's where the resolver writes its
481 When we close stderr (which implies we've also closed stdout), we also get rid
482 of any controlling terminal.
494 tls_close(FALSE); /* Shut down the TLS library */
496 (void)close(fileno(smtp_in));
497 (void)close(fileno(smtp_out));
502 (void)close(0); /* stdin */
503 if ((debug_selector & D_resolver) == 0) (void)close(1); /* stdout */
504 if (debug_selector == 0) /* stderr */
506 if (!synchronous_delivery)
519 /*************************************************
521 *************************************************/
523 /* This function sets a new uid and gid permanently, optionally calling
524 initgroups() to set auxiliary groups. There are some special cases when running
525 Exim in unprivileged modes. In these situations the effective uid will not be
526 root; if we already have the right effective uid/gid, and don't need to
527 initialize any groups, leave things as they are.
532 igflag TRUE if initgroups() wanted
533 msg text to use in debugging output and failure log
535 Returns: nothing; bombs out on failure
539 exim_setugid(uid_t uid, gid_t gid, BOOL igflag, uschar *msg)
541 uid_t euid = geteuid();
542 gid_t egid = getegid();
544 if (euid == root_uid || euid != uid || egid != gid || igflag)
546 /* At least one OS returns +1 for initgroups failure, so just check for
551 struct passwd *pw = getpwuid(uid);
554 if (initgroups(pw->pw_name, gid) != 0)
555 log_write(0,LOG_MAIN|LOG_PANIC_DIE,"initgroups failed for uid=%ld: %s",
556 (long int)uid, strerror(errno));
558 else log_write(0, LOG_MAIN|LOG_PANIC_DIE, "cannot run initgroups(): "
559 "no passwd entry for uid=%ld", (long int)uid);
562 if (setgid(gid) < 0 || setuid(uid) < 0)
564 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "unable to set gid=%ld or uid=%ld "
565 "(euid=%ld): %s", (long int)gid, (long int)uid, (long int)euid, msg);
569 /* Debugging output included uid/gid and all groups */
574 gid_t group_list[NGROUPS_MAX];
575 debug_printf("changed uid/gid: %s\n uid=%ld gid=%ld pid=%ld\n", msg,
576 (long int)geteuid(), (long int)getegid(), (long int)getpid());
577 group_count = getgroups(NGROUPS_MAX, group_list);
578 debug_printf(" auxiliary group list:");
582 for (i = 0; i < group_count; i++) debug_printf(" %d", (int)group_list[i]);
584 else debug_printf(" <none>");
592 /*************************************************
594 *************************************************/
596 /* Exim exits via this function so that it always clears up any open
602 Returns: does not return
610 debug_printf(">>>>>>>>>>>>>>>> Exim pid=%d terminating with rc=%d "
611 ">>>>>>>>>>>>>>>>\n", (int)getpid(), rc);
618 /*************************************************
619 * Extract port from host address *
620 *************************************************/
622 /* Called to extract the port from the values given to -oMa and -oMi.
623 It also checks the syntax of the address, and terminates it before the
624 port data when a port is extracted.
627 address the address, with possible port on the end
629 Returns: the port, or zero if there isn't one
630 bombs out on a syntax error
634 check_port(uschar *address)
636 int port = host_address_extract_port(address);
637 if (string_is_ip_address(address, NULL) == 0)
639 fprintf(stderr, "exim abandoned: \"%s\" is not an IP address\n", address);
647 /*************************************************
648 * Test/verify an address *
649 *************************************************/
651 /* This function is called by the -bv and -bt code. It extracts a working
652 address from a full RFC 822 address. This isn't really necessary per se, but it
653 has the effect of collapsing source routes.
657 flags flag bits for verify_address()
658 exit_value to be set for failures
664 test_address(uschar *s, int flags, int *exit_value)
666 int start, end, domain;
667 uschar *parse_error = NULL;
668 uschar *address = parse_extract_address(s, &parse_error, &start, &end, &domain,
672 fprintf(stdout, "syntax error: %s\n", parse_error);
677 int rc = verify_address(deliver_make_addr(address,TRUE), stdout, flags, -1,
678 -1, -1, NULL, NULL, NULL);
679 if (rc == FAIL) *exit_value = 2;
680 else if (rc == DEFER && *exit_value == 0) *exit_value = 1;
686 /*************************************************
687 * Show supported features *
688 *************************************************/
690 /* This function is called for -bV/--version and for -d to output the optional
691 features of the current Exim binary.
693 Arguments: a FILE for printing
698 show_whats_supported(FILE *f)
700 #ifdef DB_VERSION_STRING
701 fprintf(f, "Berkeley DB: %s\n", DB_VERSION_STRING);
702 #elif defined(BTREEVERSION) && defined(HASHVERSION)
704 fprintf(f, "Probably Berkeley DB version 1.8x (native mode)\n");
706 fprintf(f, "Probably Berkeley DB version 1.8x (compatibility mode)\n");
708 #elif defined(_DBM_RDONLY) || defined(dbm_dirfno)
709 fprintf(f, "Probably ndbm\n");
710 #elif defined(USE_TDB)
711 fprintf(f, "Using tdb\n");
714 fprintf(f, "Probably GDBM (native mode)\n");
716 fprintf(f, "Probably GDBM (compatibility mode)\n");
720 fprintf(f, "Support for:");
721 #ifdef SUPPORT_CRYPTEQ
722 fprintf(f, " crypteq");
725 fprintf(f, " iconv()");
730 #ifdef HAVE_SETCLASSRESOURCES
731 fprintf(f, " use_setclassresources");
740 fprintf(f, " Expand_dlfunc");
742 #ifdef USE_TCP_WRAPPERS
743 fprintf(f, " TCPwrappers");
747 fprintf(f, " GnuTLS");
749 fprintf(f, " OpenSSL");
752 #ifdef SUPPORT_TRANSLATE_IP_ADDRESS
753 fprintf(f, " translate_ip_address");
755 #ifdef SUPPORT_MOVE_FROZEN_MESSAGES
756 fprintf(f, " move_frozen_messages");
758 #ifdef WITH_CONTENT_SCAN
759 fprintf(f, " Content_Scanning");
764 #ifdef WITH_OLD_DEMIME
765 fprintf(f, " Old_Demime");
767 #ifdef EXPERIMENTAL_SPF
768 fprintf(f, " Experimental_SPF");
770 #ifdef EXPERIMENTAL_SRS
771 fprintf(f, " Experimental_SRS");
773 #ifdef EXPERIMENTAL_BRIGHTMAIL
774 fprintf(f, " Experimental_Brightmail");
776 #ifdef EXPERIMENTAL_DCC
777 fprintf(f, " Experimental_DCC");
781 fprintf(f, "Lookups (built-in):");
782 #if defined(LOOKUP_LSEARCH) && LOOKUP_LSEARCH!=2
783 fprintf(f, " lsearch wildlsearch nwildlsearch iplsearch");
785 #if defined(LOOKUP_CDB) && LOOKUP_CDB!=2
788 #if defined(LOOKUP_DBM) && LOOKUP_DBM!=2
789 fprintf(f, " dbm dbmnz");
791 #if defined(LOOKUP_DNSDB) && LOOKUP_DNSDB!=2
792 fprintf(f, " dnsdb");
794 #if defined(LOOKUP_DSEARCH) && LOOKUP_DSEARCH!=2
795 fprintf(f, " dsearch");
797 #if defined(LOOKUP_IBASE) && LOOKUP_IBASE!=2
798 fprintf(f, " ibase");
800 #if defined(LOOKUP_LDAP) && LOOKUP_LDAP!=2
801 fprintf(f, " ldap ldapdn ldapm");
803 #if defined(LOOKUP_MYSQL) && LOOKUP_MYSQL!=2
804 fprintf(f, " mysql");
806 #if defined(LOOKUP_NIS) && LOOKUP_NIS!=2
807 fprintf(f, " nis nis0");
809 #if defined(LOOKUP_NISPLUS) && LOOKUP_NISPLUS!=2
810 fprintf(f, " nisplus");
812 #if defined(LOOKUP_ORACLE) && LOOKUP_ORACLE!=2
813 fprintf(f, " oracle");
815 #if defined(LOOKUP_PASSWD) && LOOKUP_PASSWD!=2
816 fprintf(f, " passwd");
818 #if defined(LOOKUP_PGSQL) && LOOKUP_PGSQL!=2
819 fprintf(f, " pgsql");
821 #if defined(LOOKUP_SQLITE) && LOOKUP_SQLITE!=2
822 fprintf(f, " sqlite");
824 #if defined(LOOKUP_TESTDB) && LOOKUP_TESTDB!=2
825 fprintf(f, " testdb");
827 #if defined(LOOKUP_WHOSON) && LOOKUP_WHOSON!=2
828 fprintf(f, " whoson");
832 fprintf(f, "Authenticators:");
834 fprintf(f, " cram_md5");
836 #ifdef AUTH_CYRUS_SASL
837 fprintf(f, " cyrus_sasl");
840 fprintf(f, " dovecot");
842 #ifdef AUTH_PLAINTEXT
843 fprintf(f, " plaintext");
850 fprintf(f, "Routers:");
852 fprintf(f, " accept");
854 #ifdef ROUTER_DNSLOOKUP
855 fprintf(f, " dnslookup");
857 #ifdef ROUTER_IPLITERAL
858 fprintf(f, " ipliteral");
860 #ifdef ROUTER_IPLOOKUP
861 fprintf(f, " iplookup");
863 #ifdef ROUTER_MANUALROUTE
864 fprintf(f, " manualroute");
866 #ifdef ROUTER_QUERYPROGRAM
867 fprintf(f, " queryprogram");
869 #ifdef ROUTER_REDIRECT
870 fprintf(f, " redirect");
874 fprintf(f, "Transports:");
875 #ifdef TRANSPORT_APPENDFILE
876 fprintf(f, " appendfile");
877 #ifdef SUPPORT_MAILDIR
878 fprintf(f, "/maildir");
880 #ifdef SUPPORT_MAILSTORE
881 fprintf(f, "/mailstore");
887 #ifdef TRANSPORT_AUTOREPLY
888 fprintf(f, " autoreply");
890 #ifdef TRANSPORT_LMTP
893 #ifdef TRANSPORT_PIPE
896 #ifdef TRANSPORT_SMTP
901 if (fixed_never_users[0] > 0)
904 fprintf(f, "Fixed never_users: ");
905 for (i = 1; i <= (int)fixed_never_users[0] - 1; i++)
906 fprintf(f, "%d:", (unsigned int)fixed_never_users[i]);
907 fprintf(f, "%d\n", (unsigned int)fixed_never_users[i]);
910 fprintf(f, "Size of off_t: " SIZE_T_FMT "\n", sizeof(off_t));
912 /* This runtime check is to help diagnose library linkage mismatches which
913 result in segfaults and the like; as such, it's left until the end,
914 just in case. There will still be a "Configuration file is" line still to
917 tls_version_report(f);
920 /* Everything else is details which are only worth reporting when debugging.
921 Perhaps the tls_version_report should move into this too. */
926 #ifdef AUTH_CYRUS_SASL
927 auth_cyrus_sasl_version_report(f);
930 fprintf(f, "Library version: PCRE: Compile: %d.%d%s\n"
932 PCRE_MAJOR, PCRE_MINOR,
933 /* PRE_PRERELEASE is either defined and empty or a string.
934 * This should work: */
939 for (i = 0; i < lookup_list_count; i++)
941 if (lookup_list[i]->version_report)
942 lookup_list[i]->version_report(f);
951 /*************************************************
952 * Quote a local part *
953 *************************************************/
955 /* This function is used when a sender address or a From: or Sender: header
956 line is being created from the caller's login, or from an authenticated_id. It
957 applies appropriate quoting rules for a local part.
959 Argument: the local part
960 Returns: the local part, quoted if necessary
964 local_part_quote(uschar *lpart)
966 BOOL needs_quote = FALSE;
971 for (t = lpart; !needs_quote && *t != 0; t++)
973 needs_quote = !isalnum(*t) && strchr("!#$%&'*+-/=?^_`{|}~", *t) == NULL &&
974 (*t != '.' || t == lpart || t[1] == 0);
977 if (!needs_quote) return lpart;
980 yield = string_cat(NULL, &size, &ptr, US"\"", 1);
984 uschar *nq = US Ustrpbrk(lpart, "\\\"");
987 yield = string_cat(yield, &size, &ptr, lpart, Ustrlen(lpart));
990 yield = string_cat(yield, &size, &ptr, lpart, nq - lpart);
991 yield = string_cat(yield, &size, &ptr, US"\\", 1);
992 yield = string_cat(yield, &size, &ptr, nq, 1);
996 yield = string_cat(yield, &size, &ptr, US"\"", 1);
1004 /*************************************************
1005 * Load readline() functions *
1006 *************************************************/
1008 /* This function is called from testing executions that read data from stdin,
1009 but only when running as the calling user. Currently, only -be does this. The
1010 function loads the readline() function library and passes back the functions.
1011 On some systems, it needs the curses library, so load that too, but try without
1012 it if loading fails. All this functionality has to be requested at build time.
1015 fn_readline_ptr pointer to where to put the readline pointer
1016 fn_addhist_ptr pointer to where to put the addhistory function
1018 Returns: the dlopen handle or NULL on failure
1022 set_readline(char * (**fn_readline_ptr)(char *),
1023 char * (**fn_addhist_ptr)(char *))
1026 void *dlhandle_curses = dlopen("libcurses.so", RTLD_GLOBAL|RTLD_LAZY);
1028 dlhandle = dlopen("libreadline.so", RTLD_GLOBAL|RTLD_NOW);
1029 if (dlhandle_curses != NULL) dlclose(dlhandle_curses);
1031 if (dlhandle != NULL)
1033 *fn_readline_ptr = (char *(*)(char*))dlsym(dlhandle, "readline");
1034 *fn_addhist_ptr = (char *(*)(char*))dlsym(dlhandle, "add_history");
1038 DEBUG(D_any) debug_printf("failed to load readline: %s\n", dlerror());
1047 /*************************************************
1048 * Get a line from stdin for testing things *
1049 *************************************************/
1051 /* This function is called when running tests that can take a number of lines
1052 of input (for example, -be and -bt). It handles continuations and trailing
1053 spaces. And prompting and a blank line output on eof. If readline() is in use,
1054 the arguments are non-NULL and provide the relevant functions.
1057 fn_readline readline function or NULL
1058 fn_addhist addhist function or NULL
1060 Returns: pointer to dynamic memory, or NULL at end of file
1064 get_stdinput(char *(*fn_readline)(char *), char *(*fn_addhist)(char *))
1069 uschar *yield = NULL;
1071 if (fn_readline == NULL) { printf("> "); fflush(stdout); }
1075 uschar buffer[1024];
1079 char *readline_line = NULL;
1080 if (fn_readline != NULL)
1082 if ((readline_line = fn_readline((i > 0)? "":"> ")) == NULL) break;
1083 if (*readline_line != 0 && fn_addhist != NULL) fn_addhist(readline_line);
1084 p = US readline_line;
1089 /* readline() not in use */
1092 if (Ufgets(buffer, sizeof(buffer), stdin) == NULL) break;
1096 /* Handle the line */
1098 ss = p + (int)Ustrlen(p);
1099 while (ss > p && isspace(ss[-1])) ss--;
1103 while (p < ss && isspace(*p)) p++; /* leading space after cont */
1106 yield = string_cat(yield, &size, &ptr, p, ss - p);
1109 if (fn_readline != NULL) free(readline_line);
1112 if (ss == p || yield[ptr-1] != '\\')
1120 if (yield == NULL) printf("\n");
1126 /*************************************************
1127 * Output usage information for the program *
1128 *************************************************/
1130 /* This function is called when there are no recipients
1131 or a specific --help argument was added.
1134 progname information on what name we were called by
1136 Returns: DOES NOT RETURN
1140 exim_usage(uschar *progname)
1143 /* Handle specific program invocation varients */
1144 if (Ustrcmp(progname, US"-mailq") == 0)
1147 "mailq - list the contents of the mail queue\n\n"
1148 "For a list of options, see the Exim documentation.\n");
1152 /* Generic usage - we output this whatever happens */
1154 "Exim is a Mail Transfer Agent. It is normally called by Mail User Agents,\n"
1155 "not directly from a shell command line. Options and/or arguments control\n"
1156 "what it does when called. For a list of options, see the Exim documentation.\n");
1163 /*************************************************
1164 * Validate that the macros given are okay *
1165 *************************************************/
1167 /* Typically, Exim will drop privileges if macros are supplied. In some
1168 cases, we want to not do so.
1170 Arguments: none (macros is a global)
1171 Returns: true if trusted, false otherwise
1175 macros_trusted(void)
1177 #ifdef WHITELIST_D_MACROS
1179 uschar *whitelisted, *end, *p, **whites, **w;
1180 int white_count, i, n;
1182 BOOL prev_char_item, found;
1187 #ifndef WHITELIST_D_MACROS
1191 /* We only trust -D overrides for some invoking users:
1192 root, the exim run-time user, the optional config owner user.
1193 I don't know why config-owner would be needed, but since they can own the
1194 config files anyway, there's no security risk to letting them override -D. */
1195 if ( ! ((real_uid == root_uid)
1196 || (real_uid == exim_uid)
1197 #ifdef CONFIGURE_OWNER
1198 || (real_uid == config_uid)
1202 debug_printf("macros_trusted rejecting macros for uid %d\n", (int) real_uid);
1206 /* Get a list of macros which are whitelisted */
1207 whitelisted = string_copy_malloc(US WHITELIST_D_MACROS);
1208 prev_char_item = FALSE;
1210 for (p = whitelisted; *p != '\0'; ++p)
1212 if (*p == ':' || isspace(*p))
1217 prev_char_item = FALSE;
1220 if (!prev_char_item)
1221 prev_char_item = TRUE;
1228 whites = store_malloc(sizeof(uschar *) * (white_count+1));
1229 for (p = whitelisted, i = 0; (p != end) && (i < white_count); ++p)
1234 if (i == white_count)
1236 while (*p != '\0' && p < end)
1242 /* The list of macros should be very short. Accept the N*M complexity. */
1243 for (m = macros; m != NULL; m = m->next)
1246 for (w = whites; *w; ++w)
1247 if (Ustrcmp(*w, m->name) == 0)
1254 if (m->replacement == NULL)
1256 len = Ustrlen(m->replacement);
1259 n = pcre_exec(regex_whitelisted_macro, NULL, CS m->replacement, len,
1260 0, PCRE_EOPT, NULL, 0);
1263 if (n != PCRE_ERROR_NOMATCH)
1264 debug_printf("macros_trusted checking %s returned %d\n", m->name, n);
1268 debug_printf("macros_trusted overriden to true by whitelisting\n");
1274 /*************************************************
1275 * Entry point and high-level code *
1276 *************************************************/
1278 /* Entry point for the Exim mailer. Analyse the arguments and arrange to take
1279 the appropriate action. All the necessary functions are present in the one
1280 binary. I originally thought one should split it up, but it turns out that so
1281 much of the apparatus is needed in each chunk that one might as well just have
1282 it all available all the time, which then makes the coding easier as well.
1285 argc count of entries in argv
1286 argv argument strings, with argv[0] being the program name
1288 Returns: EXIT_SUCCESS if terminated successfully
1289 EXIT_FAILURE otherwise, except when a message has been sent
1290 to the sender, and -oee was given
1294 main(int argc, char **cargv)
1296 uschar **argv = USS cargv;
1297 int arg_receive_timeout = -1;
1298 int arg_smtp_receive_timeout = -1;
1299 int arg_error_handling = error_handling;
1300 int filter_sfd = -1;
1301 int filter_ufd = -1;
1304 int list_queue_option = 0;
1306 int msg_action_arg = -1;
1307 int namelen = (argv[0] == NULL)? 0 : Ustrlen(argv[0]);
1308 int queue_only_reason = 0;
1310 int perl_start_option = 0;
1312 int recipients_arg = argc;
1313 int sender_address_domain = 0;
1314 int test_retry_arg = -1;
1315 int test_rewrite_arg = -1;
1316 BOOL arg_queue_only = FALSE;
1317 BOOL bi_option = FALSE;
1318 BOOL checking = FALSE;
1319 BOOL count_queue = FALSE;
1320 BOOL expansion_test = FALSE;
1321 BOOL extract_recipients = FALSE;
1322 BOOL forced_delivery = FALSE;
1323 BOOL f_end_dot = FALSE;
1324 BOOL deliver_give_up = FALSE;
1325 BOOL list_queue = FALSE;
1326 BOOL list_options = FALSE;
1327 BOOL local_queue_only;
1329 BOOL one_msg_action = FALSE;
1330 BOOL queue_only_set = FALSE;
1331 BOOL receiving_message = TRUE;
1332 BOOL sender_ident_set = FALSE;
1333 BOOL session_local_queue_only;
1335 BOOL removed_privilege = FALSE;
1336 BOOL usage_wanted = FALSE;
1337 BOOL verify_address_mode = FALSE;
1338 BOOL verify_as_sender = FALSE;
1339 BOOL version_printed = FALSE;
1340 uschar *alias_arg = NULL;
1341 uschar *called_as = US"";
1342 uschar *start_queue_run_id = NULL;
1343 uschar *stop_queue_run_id = NULL;
1344 uschar *expansion_test_message = NULL;
1345 uschar *ftest_domain = NULL;
1346 uschar *ftest_localpart = NULL;
1347 uschar *ftest_prefix = NULL;
1348 uschar *ftest_suffix = NULL;
1349 uschar *malware_test_file = NULL;
1350 uschar *real_sender_address;
1351 uschar *originator_home = US"/";
1355 struct stat statbuf;
1356 pid_t passed_qr_pid = (pid_t)0;
1357 int passed_qr_pipe = -1;
1358 gid_t group_list[NGROUPS_MAX];
1360 /* Possible options for -R and -S */
1362 static uschar *rsopts[] = { US"f", US"ff", US"r", US"rf", US"rff" };
1364 /* Need to define this in case we need to change the environment in order
1365 to get rid of a bogus time zone. We have to make it char rather than uschar
1366 because some OS define it in /usr/include/unistd.h. */
1368 extern char **environ;
1370 /* If the Exim user and/or group and/or the configuration file owner/group were
1371 defined by ref:name at build time, we must now find the actual uid/gid values.
1372 This is a feature to make the lives of binary distributors easier. */
1374 #ifdef EXIM_USERNAME
1375 if (route_finduser(US EXIM_USERNAME, &pw, &exim_uid))
1379 fprintf(stderr, "exim: refusing to run with uid 0 for \"%s\"\n",
1383 exim_gid = pw->pw_gid;
1387 fprintf(stderr, "exim: failed to find uid for user name \"%s\"\n",
1393 #ifdef EXIM_GROUPNAME
1394 if (!route_findgroup(US EXIM_GROUPNAME, &exim_gid))
1396 fprintf(stderr, "exim: failed to find gid for group name \"%s\"\n",
1402 #ifdef CONFIGURE_OWNERNAME
1403 if (!route_finduser(US CONFIGURE_OWNERNAME, NULL, &config_uid))
1405 fprintf(stderr, "exim: failed to find uid for user name \"%s\"\n",
1406 CONFIGURE_OWNERNAME);
1411 /* We default the system_filter_user to be the Exim run-time user, as a
1412 sane non-root value. */
1413 system_filter_uid = exim_uid;
1415 #ifdef CONFIGURE_GROUPNAME
1416 if (!route_findgroup(US CONFIGURE_GROUPNAME, &config_gid))
1418 fprintf(stderr, "exim: failed to find gid for group name \"%s\"\n",
1419 CONFIGURE_GROUPNAME);
1424 /* In the Cygwin environment, some initialization needs doing. It is fudged
1425 in by means of this macro. */
1431 /* Check a field which is patched when we are running Exim within its
1432 testing harness; do a fast initial check, and then the whole thing. */
1434 running_in_test_harness =
1435 *running_status == '<' && Ustrcmp(running_status, "<<<testing>>>") == 0;
1437 /* The C standard says that the equivalent of setlocale(LC_ALL, "C") is obeyed
1438 at the start of a program; however, it seems that some environments do not
1439 follow this. A "strange" locale can affect the formatting of timestamps, so we
1442 setlocale(LC_ALL, "C");
1444 /* Set up the default handler for timing using alarm(). */
1446 os_non_restarting_signal(SIGALRM, sigalrm_handler);
1448 /* Ensure we have a buffer for constructing log entries. Use malloc directly,
1449 because store_malloc writes a log entry on failure. */
1451 log_buffer = (uschar *)malloc(LOG_BUFFER_SIZE);
1452 if (log_buffer == NULL)
1454 fprintf(stderr, "exim: failed to get store for log buffer\n");
1458 /* Set log_stderr to stderr, provided that stderr exists. This gets reset to
1459 NULL when the daemon is run and the file is closed. We have to use this
1460 indirection, because some systems don't allow writing to the variable "stderr".
1463 if (fstat(fileno(stderr), &statbuf) >= 0) log_stderr = stderr;
1465 /* Arrange for the PCRE regex library to use our store functions. Note that
1466 the normal calls are actually macros that add additional arguments for
1467 debugging purposes so we have to assign specially constructed functions here.
1468 The default is to use store in the stacking pool, but this is overridden in the
1469 regex_must_compile() function. */
1471 pcre_malloc = function_store_get;
1472 pcre_free = function_dummy_free;
1474 /* Ensure there is a big buffer for temporary use in several places. It is put
1475 in malloc store so that it can be freed for enlargement if necessary. */
1477 big_buffer = store_malloc(big_buffer_size);
1479 /* Set up the handler for the data request signal, and set the initial
1480 descriptive text. */
1482 set_process_info("initializing");
1483 os_restarting_signal(SIGUSR1, usr1_handler);
1485 /* SIGHUP is used to get the daemon to reconfigure. It gets set as appropriate
1486 in the daemon code. For the rest of Exim's uses, we ignore it. */
1488 signal(SIGHUP, SIG_IGN);
1490 /* We don't want to die on pipe errors as the code is written to handle
1491 the write error instead. */
1493 signal(SIGPIPE, SIG_IGN);
1495 /* Under some circumstance on some OS, Exim can get called with SIGCHLD
1496 set to SIG_IGN. This causes subprocesses that complete before the parent
1497 process waits for them not to hang around, so when Exim calls wait(), nothing
1498 is there. The wait() code has been made robust against this, but let's ensure
1499 that SIGCHLD is set to SIG_DFL, because it's tidier to wait and get a process
1500 ending status. We use sigaction rather than plain signal() on those OS where
1501 SA_NOCLDWAIT exists, because we want to be sure it is turned off. (There was a
1502 problem on AIX with this.) */
1506 struct sigaction act;
1507 act.sa_handler = SIG_DFL;
1508 sigemptyset(&(act.sa_mask));
1510 sigaction(SIGCHLD, &act, NULL);
1513 signal(SIGCHLD, SIG_DFL);
1516 /* Save the arguments for use if we re-exec exim as a daemon after receiving
1521 /* Set up the version number. Set up the leading 'E' for the external form of
1522 message ids, set the pointer to the internal form, and initialize it to
1523 indicate no message being processed. */
1526 message_id_option[0] = '-';
1527 message_id_external = message_id_option + 1;
1528 message_id_external[0] = 'E';
1529 message_id = message_id_external + 1;
1532 /* Set the umask to zero so that any files Exim creates using open() are
1533 created with the modes that it specifies. NOTE: Files created with fopen() have
1534 a problem, which was not recognized till rather late (February 2006). With this
1535 umask, such files will be world writeable. (They are all content scanning files
1536 in the spool directory, which isn't world-accessible, so this is not a
1537 disaster, but it's untidy.) I don't want to change this overall setting,
1538 however, because it will interact badly with the open() calls. Instead, there's
1539 now a function called modefopen() that fiddles with the umask while calling
1544 /* Precompile the regular expression for matching a message id. Keep this in
1545 step with the code that generates ids in the accept.c module. We need to do
1546 this here, because the -M options check their arguments for syntactic validity
1547 using mac_ismsgid, which uses this. */
1550 regex_must_compile(US"^(?:[^\\W_]{6}-){2}[^\\W_]{2}$", FALSE, TRUE);
1552 /* Precompile the regular expression that is used for matching an SMTP error
1553 code, possibly extended, at the start of an error message. Note that the
1554 terminating whitespace character is included. */
1557 regex_must_compile(US"^\\d\\d\\d\\s(?:\\d\\.\\d\\d?\\d?\\.\\d\\d?\\d?\\s)?",
1560 #ifdef WHITELIST_D_MACROS
1561 /* Precompile the regular expression used to filter the content of macros
1562 given to -D for permissibility. */
1564 regex_whitelisted_macro =
1565 regex_must_compile(US"^[A-Za-z0-9_/.-]*$", FALSE, TRUE);
1569 /* If the program is called as "mailq" treat it as equivalent to "exim -bp";
1570 this seems to be a generally accepted convention, since one finds symbolic
1571 links called "mailq" in standard OS configurations. */
1573 if ((namelen == 5 && Ustrcmp(argv[0], "mailq") == 0) ||
1574 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/mailq", 6) == 0))
1577 receiving_message = FALSE;
1578 called_as = US"-mailq";
1581 /* If the program is called as "rmail" treat it as equivalent to
1582 "exim -i -oee", thus allowing UUCP messages to be input using non-SMTP mode,
1583 i.e. preventing a single dot on a line from terminating the message, and
1584 returning with zero return code, even in cases of error (provided an error
1585 message has been sent). */
1587 if ((namelen == 5 && Ustrcmp(argv[0], "rmail") == 0) ||
1588 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/rmail", 6) == 0))
1591 called_as = US"-rmail";
1592 errors_sender_rc = EXIT_SUCCESS;
1595 /* If the program is called as "rsmtp" treat it as equivalent to "exim -bS";
1596 this is a smail convention. */
1598 if ((namelen == 5 && Ustrcmp(argv[0], "rsmtp") == 0) ||
1599 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/rsmtp", 6) == 0))
1601 smtp_input = smtp_batched_input = TRUE;
1602 called_as = US"-rsmtp";
1605 /* If the program is called as "runq" treat it as equivalent to "exim -q";
1606 this is a smail convention. */
1608 if ((namelen == 4 && Ustrcmp(argv[0], "runq") == 0) ||
1609 (namelen > 4 && Ustrncmp(argv[0] + namelen - 5, "/runq", 5) == 0))
1612 receiving_message = FALSE;
1613 called_as = US"-runq";
1616 /* If the program is called as "newaliases" treat it as equivalent to
1617 "exim -bi"; this is a sendmail convention. */
1619 if ((namelen == 10 && Ustrcmp(argv[0], "newaliases") == 0) ||
1620 (namelen > 10 && Ustrncmp(argv[0] + namelen - 11, "/newaliases", 11) == 0))
1623 receiving_message = FALSE;
1624 called_as = US"-newaliases";
1627 /* Save the original effective uid for a couple of uses later. It should
1628 normally be root, but in some esoteric environments it may not be. */
1630 original_euid = geteuid();
1632 /* Get the real uid and gid. If the caller is root, force the effective uid/gid
1633 to be the same as the real ones. This makes a difference only if Exim is setuid
1634 (or setgid) to something other than root, which could be the case in some
1635 special configurations. */
1637 real_uid = getuid();
1638 real_gid = getgid();
1640 if (real_uid == root_uid)
1642 rv = setgid(real_gid);
1645 fprintf(stderr, "exim: setgid(%ld) failed: %s\n",
1646 (long int)real_gid, strerror(errno));
1649 rv = setuid(real_uid);
1652 fprintf(stderr, "exim: setuid(%ld) failed: %s\n",
1653 (long int)real_uid, strerror(errno));
1658 /* If neither the original real uid nor the original euid was root, Exim is
1659 running in an unprivileged state. */
1661 unprivileged = (real_uid != root_uid && original_euid != root_uid);
1663 /* Scan the program's arguments. Some can be dealt with right away; others are
1664 simply recorded for checking and handling afterwards. Do a high-level switch
1665 on the second character (the one after '-'), to save some effort. */
1667 for (i = 1; i < argc; i++)
1669 BOOL badarg = FALSE;
1670 uschar *arg = argv[i];
1674 /* An argument not starting with '-' is the start of a recipients list;
1675 break out of the options-scanning loop. */
1683 /* An option consistion of -- terminates the options */
1685 if (Ustrcmp(arg, "--") == 0)
1687 recipients_arg = i + 1;
1691 /* Handle flagged options */
1693 switchchar = arg[1];
1696 /* Make all -ex options synonymous with -oex arguments, since that
1697 is assumed by various callers. Also make -qR options synonymous with -R
1698 options, as that seems to be required as well. Allow for -qqR too, and
1699 the same for -S options. */
1701 if (Ustrncmp(arg+1, "oe", 2) == 0 ||
1702 Ustrncmp(arg+1, "qR", 2) == 0 ||
1703 Ustrncmp(arg+1, "qS", 2) == 0)
1705 switchchar = arg[2];
1708 else if (Ustrncmp(arg+1, "qqR", 3) == 0 || Ustrncmp(arg+1, "qqS", 3) == 0)
1710 switchchar = arg[3];
1712 queue_2stage = TRUE;
1715 /* Make -r synonymous with -f, since it is a documented alias */
1717 else if (arg[1] == 'r') switchchar = 'f';
1719 /* Make -ov synonymous with -v */
1721 else if (Ustrcmp(arg, "-ov") == 0)
1727 /* deal with --option_aliases */
1728 else if (switchchar == '-')
1730 if (Ustrcmp(argrest, "help") == 0)
1732 usage_wanted = TRUE;
1735 else if (Ustrcmp(argrest, "version") == 0)
1742 /* High-level switch on active initial letter */
1746 /* -Btype is a sendmail option for 7bit/8bit setting. Exim is 8-bit clean
1747 so has no need of it. */
1750 if (*argrest == 0) i++; /* Skip over the type */
1755 receiving_message = FALSE; /* Reset TRUE for -bm, -bS, -bs below */
1757 /* -bd: Run in daemon mode, awaiting SMTP connections.
1758 -bdf: Ditto, but in the foreground.
1761 if (*argrest == 'd')
1763 daemon_listen = TRUE;
1764 if (*(++argrest) == 'f') background_daemon = FALSE;
1765 else if (*argrest != 0) { badarg = TRUE; break; }
1768 /* -be: Run in expansion test mode
1769 -bem: Ditto, but read a message from a file first
1772 else if (*argrest == 'e')
1774 expansion_test = checking = TRUE;
1775 if (argrest[1] == 'm')
1777 if (++i >= argc) { badarg = TRUE; break; }
1778 expansion_test_message = argv[i];
1781 if (argrest[1] != 0) { badarg = TRUE; break; }
1784 /* -bF: Run system filter test */
1786 else if (*argrest == 'F')
1788 filter_test |= FTEST_SYSTEM;
1789 if (*(++argrest) != 0) { badarg = TRUE; break; }
1790 if (++i < argc) filter_test_sfile = argv[i]; else
1792 fprintf(stderr, "exim: file name expected after %s\n", argv[i-1]);
1797 /* -bf: Run user filter test
1798 -bfd: Set domain for filter testing
1799 -bfl: Set local part for filter testing
1800 -bfp: Set prefix for filter testing
1801 -bfs: Set suffix for filter testing
1804 else if (*argrest == 'f')
1806 if (*(++argrest) == 0)
1808 filter_test |= FTEST_USER;
1809 if (++i < argc) filter_test_ufile = argv[i]; else
1811 fprintf(stderr, "exim: file name expected after %s\n", argv[i-1]);
1819 fprintf(stderr, "exim: string expected after %s\n", arg);
1822 if (Ustrcmp(argrest, "d") == 0) ftest_domain = argv[i];
1823 else if (Ustrcmp(argrest, "l") == 0) ftest_localpart = argv[i];
1824 else if (Ustrcmp(argrest, "p") == 0) ftest_prefix = argv[i];
1825 else if (Ustrcmp(argrest, "s") == 0) ftest_suffix = argv[i];
1826 else { badarg = TRUE; break; }
1830 /* -bh: Host checking - an IP address must follow. */
1832 else if (Ustrcmp(argrest, "h") == 0 || Ustrcmp(argrest, "hc") == 0)
1834 if (++i >= argc) { badarg = TRUE; break; }
1835 sender_host_address = argv[i];
1836 host_checking = checking = log_testing_mode = TRUE;
1837 host_checking_callout = argrest[1] == 'c';
1840 /* -bi: This option is used by sendmail to initialize *the* alias file,
1841 though it has the -oA option to specify a different file. Exim has no
1842 concept of *the* alias file, but since Sun's YP make script calls
1843 sendmail this way, some support must be provided. */
1845 else if (Ustrcmp(argrest, "i") == 0) bi_option = TRUE;
1847 /* -bm: Accept and deliver message - the default option. Reinstate
1848 receiving_message, which got turned off for all -b options. */
1850 else if (Ustrcmp(argrest, "m") == 0) receiving_message = TRUE;
1852 /* -bmalware: test the filename given for malware */
1854 else if (Ustrcmp(argrest, "malware") == 0)
1856 if (++i >= argc) { badarg = TRUE; break; }
1857 malware_test_file = argv[i];
1860 /* -bnq: For locally originating messages, do not qualify unqualified
1861 addresses. In the envelope, this causes errors; in header lines they
1864 else if (Ustrcmp(argrest, "nq") == 0)
1866 allow_unqualified_sender = FALSE;
1867 allow_unqualified_recipient = FALSE;
1870 /* -bpxx: List the contents of the mail queue, in various forms. If
1871 the option is -bpc, just a queue count is needed. Otherwise, if the
1872 first letter after p is r, then order is random. */
1874 else if (*argrest == 'p')
1876 if (*(++argrest) == 'c')
1879 if (*(++argrest) != 0) badarg = TRUE;
1883 if (*argrest == 'r')
1885 list_queue_option = 8;
1888 else list_queue_option = 0;
1892 /* -bp: List the contents of the mail queue, top-level only */
1894 if (*argrest == 0) {}
1896 /* -bpu: List the contents of the mail queue, top-level undelivered */
1898 else if (Ustrcmp(argrest, "u") == 0) list_queue_option += 1;
1900 /* -bpa: List the contents of the mail queue, including all delivered */
1902 else if (Ustrcmp(argrest, "a") == 0) list_queue_option += 2;
1904 /* Unknown after -bp[r] */
1914 /* -bP: List the configuration variables given as the address list.
1915 Force -v, so configuration errors get displayed. */
1917 else if (Ustrcmp(argrest, "P") == 0)
1919 list_options = TRUE;
1920 debug_selector |= D_v;
1921 debug_file = stderr;
1924 /* -brt: Test retry configuration lookup */
1926 else if (Ustrcmp(argrest, "rt") == 0)
1928 test_retry_arg = i + 1;
1932 /* -brw: Test rewrite configuration */
1934 else if (Ustrcmp(argrest, "rw") == 0)
1936 test_rewrite_arg = i + 1;
1940 /* -bS: Read SMTP commands on standard input, but produce no replies -
1941 all errors are reported by sending messages. */
1943 else if (Ustrcmp(argrest, "S") == 0)
1944 smtp_input = smtp_batched_input = receiving_message = TRUE;
1946 /* -bs: Read SMTP commands on standard input and produce SMTP replies
1947 on standard output. */
1949 else if (Ustrcmp(argrest, "s") == 0) smtp_input = receiving_message = TRUE;
1951 /* -bt: address testing mode */
1953 else if (Ustrcmp(argrest, "t") == 0)
1954 address_test_mode = checking = log_testing_mode = TRUE;
1956 /* -bv: verify addresses */
1958 else if (Ustrcmp(argrest, "v") == 0)
1959 verify_address_mode = checking = log_testing_mode = TRUE;
1961 /* -bvs: verify sender addresses */
1963 else if (Ustrcmp(argrest, "vs") == 0)
1965 verify_address_mode = checking = log_testing_mode = TRUE;
1966 verify_as_sender = TRUE;
1969 /* -bV: Print version string and support details */
1971 else if (Ustrcmp(argrest, "V") == 0)
1973 printf("Exim version %s #%s built %s\n", version_string,
1974 version_cnumber, version_date);
1975 printf("%s\n", CS version_copyright);
1976 version_printed = TRUE;
1977 show_whats_supported(stdout);
1984 /* -C: change configuration file list; ignore if it isn't really
1985 a change! Enforce a prefix check if required. */
1990 if(++i < argc) argrest = argv[i]; else
1991 { badarg = TRUE; break; }
1993 if (Ustrcmp(config_main_filelist, argrest) != 0)
1995 #ifdef ALT_CONFIG_PREFIX
1997 int len = Ustrlen(ALT_CONFIG_PREFIX);
1998 uschar *list = argrest;
2000 while((filename = string_nextinlist(&list, &sep, big_buffer,
2001 big_buffer_size)) != NULL)
2003 if ((Ustrlen(filename) < len ||
2004 Ustrncmp(filename, ALT_CONFIG_PREFIX, len) != 0 ||
2005 Ustrstr(filename, "/../") != NULL) &&
2006 (Ustrcmp(filename, "/dev/null") != 0 || real_uid != root_uid))
2008 fprintf(stderr, "-C Permission denied\n");
2013 if (real_uid != root_uid)
2015 #ifdef TRUSTED_CONFIG_LIST
2017 if (real_uid != exim_uid
2018 #ifdef CONFIGURE_OWNER
2019 && real_uid != config_uid
2022 trusted_config = FALSE;
2025 FILE *trust_list = Ufopen(TRUSTED_CONFIG_LIST, "rb");
2028 struct stat statbuf;
2030 if (fstat(fileno(trust_list), &statbuf) != 0 ||
2031 (statbuf.st_uid != root_uid /* owner not root */
2032 #ifdef CONFIGURE_OWNER
2033 && statbuf.st_uid != config_uid /* owner not the special one */
2036 (statbuf.st_gid != root_gid /* group not root */
2037 #ifdef CONFIGURE_GROUP
2038 && statbuf.st_gid != config_gid /* group not the special one */
2040 && (statbuf.st_mode & 020) != 0 /* group writeable */
2042 (statbuf.st_mode & 2) != 0) /* world writeable */
2044 trusted_config = FALSE;
2049 /* Well, the trust list at least is up to scratch... */
2050 void *reset_point = store_get(0);
2051 uschar *trusted_configs[32];
2055 while (Ufgets(big_buffer, big_buffer_size, trust_list))
2057 uschar *start = big_buffer, *nl;
2058 while (*start && isspace(*start))
2062 nl = Ustrchr(start, '\n');
2065 trusted_configs[nr_configs++] = string_copy(start);
2066 if (nr_configs == 32)
2074 uschar *list = argrest;
2076 while (trusted_config && (filename = string_nextinlist(&list,
2077 &sep, big_buffer, big_buffer_size)) != NULL)
2079 for (i=0; i < nr_configs; i++)
2081 if (Ustrcmp(filename, trusted_configs[i]) == 0)
2084 if (i == nr_configs)
2086 trusted_config = FALSE;
2090 store_reset(reset_point);
2094 /* No valid prefixes found in trust_list file. */
2095 trusted_config = FALSE;
2101 /* Could not open trust_list file. */
2102 trusted_config = FALSE;
2106 /* Not root; don't trust config */
2107 trusted_config = FALSE;
2111 config_main_filelist = argrest;
2112 config_changed = TRUE;
2117 /* -D: set up a macro definition */
2120 #ifdef DISABLE_D_OPTION
2121 fprintf(stderr, "exim: -D is not available in this Exim binary\n");
2126 macro_item *mlast = NULL;
2129 uschar *s = argrest;
2131 while (isspace(*s)) s++;
2133 if (*s < 'A' || *s > 'Z')
2135 fprintf(stderr, "exim: macro name set by -D must start with "
2136 "an upper case letter\n");
2140 while (isalnum(*s) || *s == '_')
2142 if (ptr < sizeof(name)-1) name[ptr++] = *s;
2146 if (ptr == 0) { badarg = TRUE; break; }
2147 while (isspace(*s)) s++;
2150 if (*s++ != '=') { badarg = TRUE; break; }
2151 while (isspace(*s)) s++;
2154 for (m = macros; m != NULL; m = m->next)
2156 if (Ustrcmp(m->name, name) == 0)
2158 fprintf(stderr, "exim: duplicated -D in command line\n");
2164 m = store_get(sizeof(macro_item) + Ustrlen(name));
2166 m->command_line = TRUE;
2167 if (mlast == NULL) macros = m; else mlast->next = m;
2168 Ustrcpy(m->name, name);
2169 m->replacement = string_copy(s);
2171 if (clmacro_count >= MAX_CLMACROS)
2173 fprintf(stderr, "exim: too many -D options on command line\n");
2176 clmacros[clmacro_count++] = string_sprintf("-D%s=%s", m->name,
2182 /* -d: Set debug level (see also -v below) or set the drop_cr option.
2183 The latter is now a no-op, retained for compatibility only. If -dd is used,
2184 debugging subprocesses of the daemon is disabled. */
2187 if (Ustrcmp(argrest, "ropcr") == 0)
2189 /* drop_cr = TRUE; */
2192 /* Use an intermediate variable so that we don't set debugging while
2193 decoding the debugging bits. */
2197 unsigned int selector = D_default;
2200 if (*argrest == 'd')
2202 debug_daemon = TRUE;
2206 decode_bits(&selector, NULL, D_memory, 0, argrest, debug_options,
2207 debug_options_count, US"debug", 0);
2208 debug_selector = selector;
2213 /* -E: This is a local error message. This option is not intended for
2214 external use at all, but is not restricted to trusted callers because it
2215 does no harm (just suppresses certain error messages) and if Exim is run
2216 not setuid root it won't always be trusted when it generates error
2217 messages using this option. If there is a message id following -E, point
2218 message_reference at it, for logging. */
2221 local_error_message = TRUE;
2222 if (mac_ismsgid(argrest)) message_reference = argrest;
2226 /* -ex: The vacation program calls sendmail with the undocumented "-eq"
2227 option, so it looks as if historically the -oex options are also callable
2228 without the leading -o. So we have to accept them. Before the switch,
2229 anything starting -oe has been converted to -e. Exim does not support all
2230 of the sendmail error options. */
2233 if (Ustrcmp(argrest, "e") == 0)
2235 arg_error_handling = ERRORS_SENDER;
2236 errors_sender_rc = EXIT_SUCCESS;
2238 else if (Ustrcmp(argrest, "m") == 0) arg_error_handling = ERRORS_SENDER;
2239 else if (Ustrcmp(argrest, "p") == 0) arg_error_handling = ERRORS_STDERR;
2240 else if (Ustrcmp(argrest, "q") == 0) arg_error_handling = ERRORS_STDERR;
2241 else if (Ustrcmp(argrest, "w") == 0) arg_error_handling = ERRORS_SENDER;
2246 /* -F: Set sender's full name, used instead of the gecos entry from
2247 the password file. Since users can usually alter their gecos entries,
2248 there's no security involved in using this instead. The data can follow
2249 the -F or be in the next argument. */
2254 if(++i < argc) argrest = argv[i]; else
2255 { badarg = TRUE; break; }
2257 originator_name = argrest;
2258 sender_name_forced = TRUE;
2262 /* -f: Set sender's address - this value is only actually used if Exim is
2263 run by a trusted user, or if untrusted_set_sender is set and matches the
2264 address, except that the null address can always be set by any user. The
2265 test for this happens later, when the value given here is ignored when not
2266 permitted. For an untrusted user, the actual sender is still put in Sender:
2267 if it doesn't match the From: header (unless no_local_from_check is set).
2268 The data can follow the -f or be in the next argument. The -r switch is an
2269 obsolete form of -f but since there appear to be programs out there that
2270 use anything that sendmail has ever supported, better accept it - the
2271 synonymizing is done before the switch above.
2273 At this stage, we must allow domain literal addresses, because we don't
2274 know what the setting of allow_domain_literals is yet. Ditto for trailing
2275 dots and strip_trailing_dot. */
2283 if (i+1 < argc) argrest = argv[++i]; else
2284 { badarg = TRUE; break; }
2288 sender_address = string_sprintf(""); /* Ensure writeable memory */
2292 uschar *temp = argrest + Ustrlen(argrest) - 1;
2293 while (temp >= argrest && isspace(*temp)) temp--;
2294 if (temp >= argrest && *temp == '.') f_end_dot = TRUE;
2295 allow_domain_literals = TRUE;
2296 strip_trailing_dot = TRUE;
2297 sender_address = parse_extract_address(argrest, &errmess, &start, &end,
2298 &sender_address_domain, TRUE);
2299 allow_domain_literals = FALSE;
2300 strip_trailing_dot = FALSE;
2301 if (sender_address == NULL)
2303 fprintf(stderr, "exim: bad -f address \"%s\": %s\n", argrest, errmess);
2304 return EXIT_FAILURE;
2307 sender_address_forced = TRUE;
2311 /* This is some Sendmail thing which can be ignored */
2316 /* -h: Set the hop count for an incoming message. Exim does not currently
2317 support this; it always computes it by counting the Received: headers.
2318 To put it in will require a change to the spool header file format. */
2323 if(++i < argc) argrest = argv[i]; else
2324 { badarg = TRUE; break; }
2326 if (!isdigit(*argrest)) badarg = TRUE;
2330 /* -i: Set flag so dot doesn't end non-SMTP input (same as -oi, seems
2331 not to be documented for sendmail but mailx (at least) uses it) */
2334 if (*argrest == 0) dot_ends = FALSE; else badarg = TRUE;
2339 receiving_message = FALSE;
2341 /* -MC: continue delivery of another message via an existing open
2342 file descriptor. This option is used for an internal call by the
2343 smtp transport when there is a pending message waiting to go to an
2344 address to which it has got a connection. Five subsequent arguments are
2345 required: transport name, host name, IP address, sequence number, and
2346 message_id. Transports may decline to create new processes if the sequence
2347 number gets too big. The channel is stdin. This (-MC) must be the last
2348 argument. There's a subsequent check that the real-uid is privileged.
2350 If we are running in the test harness. delay for a bit, to let the process
2351 that set this one up complete. This makes for repeatability of the logging,
2354 if (Ustrcmp(argrest, "C") == 0)
2356 union sockaddr_46 interface_sock;
2357 EXIM_SOCKLEN_T size = sizeof(interface_sock);
2361 fprintf(stderr, "exim: too many or too few arguments after -MC\n");
2362 return EXIT_FAILURE;
2365 if (msg_action_arg >= 0)
2367 fprintf(stderr, "exim: incompatible arguments\n");
2368 return EXIT_FAILURE;
2371 continue_transport = argv[++i];
2372 continue_hostname = argv[++i];
2373 continue_host_address = argv[++i];
2374 continue_sequence = Uatoi(argv[++i]);
2375 msg_action = MSG_DELIVER;
2376 msg_action_arg = ++i;
2377 forced_delivery = TRUE;
2378 queue_run_pid = passed_qr_pid;
2379 queue_run_pipe = passed_qr_pipe;
2381 if (!mac_ismsgid(argv[i]))
2383 fprintf(stderr, "exim: malformed message id %s after -MC option\n",
2385 return EXIT_FAILURE;
2388 /* Set up $sending_ip_address and $sending_port */
2390 if (getsockname(fileno(stdin), (struct sockaddr *)(&interface_sock),
2392 sending_ip_address = host_ntoa(-1, &interface_sock, NULL,
2396 fprintf(stderr, "exim: getsockname() failed after -MC option: %s\n",
2398 return EXIT_FAILURE;
2401 if (running_in_test_harness) millisleep(500);
2405 /* -MCA: set the smtp_authenticated flag; this is useful only when it
2406 precedes -MC (see above). The flag indicates that the host to which
2407 Exim is connected has accepted an AUTH sequence. */
2409 else if (Ustrcmp(argrest, "CA") == 0)
2411 smtp_authenticated = TRUE;
2415 /* -MCP: set the smtp_use_pipelining flag; this is useful only when
2416 it preceded -MC (see above) */
2418 else if (Ustrcmp(argrest, "CP") == 0)
2420 smtp_use_pipelining = TRUE;
2424 /* -MCQ: pass on the pid of the queue-running process that started
2425 this chain of deliveries and the fd of its synchronizing pipe; this
2426 is useful only when it precedes -MC (see above) */
2428 else if (Ustrcmp(argrest, "CQ") == 0)
2430 if(++i < argc) passed_qr_pid = (pid_t)(Uatol(argv[i]));
2432 if(++i < argc) passed_qr_pipe = (int)(Uatol(argv[i]));
2437 /* -MCS: set the smtp_use_size flag; this is useful only when it
2438 precedes -MC (see above) */
2440 else if (Ustrcmp(argrest, "CS") == 0)
2442 smtp_use_size = TRUE;
2446 /* -MCT: set the tls_offered flag; this is useful only when it
2447 precedes -MC (see above). The flag indicates that the host to which
2448 Exim is connected has offered TLS support. */
2451 else if (Ustrcmp(argrest, "CT") == 0)
2458 /* -M[x]: various operations on the following list of message ids:
2459 -M deliver the messages, ignoring next retry times and thawing
2460 -Mc deliver the messages, checking next retry times, no thawing
2461 -Mf freeze the messages
2462 -Mg give up on the messages
2463 -Mt thaw the messages
2464 -Mrm remove the messages
2465 In the above cases, this must be the last option. There are also the
2466 following options which are followed by a single message id, and which
2467 act on that message. Some of them use the "recipient" addresses as well.
2468 -Mar add recipient(s)
2469 -Mmad mark all recipients delivered
2470 -Mmd mark recipients(s) delivered
2472 -Mset load a message for use with -be
2474 -Mvc show copy (of whole message, in RFC 2822 format)
2479 else if (*argrest == 0)
2481 msg_action = MSG_DELIVER;
2482 forced_delivery = deliver_force_thaw = TRUE;
2484 else if (Ustrcmp(argrest, "ar") == 0)
2486 msg_action = MSG_ADD_RECIPIENT;
2487 one_msg_action = TRUE;
2489 else if (Ustrcmp(argrest, "c") == 0) msg_action = MSG_DELIVER;
2490 else if (Ustrcmp(argrest, "es") == 0)
2492 msg_action = MSG_EDIT_SENDER;
2493 one_msg_action = TRUE;
2495 else if (Ustrcmp(argrest, "f") == 0) msg_action = MSG_FREEZE;
2496 else if (Ustrcmp(argrest, "g") == 0)
2498 msg_action = MSG_DELIVER;
2499 deliver_give_up = TRUE;
2501 else if (Ustrcmp(argrest, "mad") == 0)
2503 msg_action = MSG_MARK_ALL_DELIVERED;
2505 else if (Ustrcmp(argrest, "md") == 0)
2507 msg_action = MSG_MARK_DELIVERED;
2508 one_msg_action = TRUE;
2510 else if (Ustrcmp(argrest, "rm") == 0) msg_action = MSG_REMOVE;
2511 else if (Ustrcmp(argrest, "set") == 0)
2513 msg_action = MSG_LOAD;
2514 one_msg_action = TRUE;
2516 else if (Ustrcmp(argrest, "t") == 0) msg_action = MSG_THAW;
2517 else if (Ustrcmp(argrest, "vb") == 0)
2519 msg_action = MSG_SHOW_BODY;
2520 one_msg_action = TRUE;
2522 else if (Ustrcmp(argrest, "vc") == 0)
2524 msg_action = MSG_SHOW_COPY;
2525 one_msg_action = TRUE;
2527 else if (Ustrcmp(argrest, "vh") == 0)
2529 msg_action = MSG_SHOW_HEADER;
2530 one_msg_action = TRUE;
2532 else if (Ustrcmp(argrest, "vl") == 0)
2534 msg_action = MSG_SHOW_LOG;
2535 one_msg_action = TRUE;
2537 else { badarg = TRUE; break; }
2539 /* All the -Mxx options require at least one message id. */
2541 msg_action_arg = i + 1;
2542 if (msg_action_arg >= argc)
2544 fprintf(stderr, "exim: no message ids given after %s option\n", arg);
2545 return EXIT_FAILURE;
2548 /* Some require only message ids to follow */
2550 if (!one_msg_action)
2553 for (j = msg_action_arg; j < argc; j++) if (!mac_ismsgid(argv[j]))
2555 fprintf(stderr, "exim: malformed message id %s after %s option\n",
2557 return EXIT_FAILURE;
2559 goto END_ARG; /* Remaining args are ids */
2562 /* Others require only one message id, possibly followed by addresses,
2563 which will be handled as normal arguments. */
2567 if (!mac_ismsgid(argv[msg_action_arg]))
2569 fprintf(stderr, "exim: malformed message id %s after %s option\n",
2570 argv[msg_action_arg], arg);
2571 return EXIT_FAILURE;
2578 /* Some programs seem to call the -om option without the leading o;
2579 for sendmail it askes for "me too". Exim always does this. */
2582 if (*argrest != 0) badarg = TRUE;
2586 /* -N: don't do delivery - a debugging option that stops transports doing
2587 their thing. It implies debugging at the D_v level. */
2592 dont_deliver = TRUE;
2593 debug_selector |= D_v;
2594 debug_file = stderr;
2600 /* -n: This means "don't alias" in sendmail, apparently. Just ignore
2606 /* -O: Just ignore it. In sendmail, apparently -O option=value means set
2607 option to the specified value. This form uses long names. We need to handle
2608 -O option=value and -Ooption=value. */
2615 fprintf(stderr, "exim: string expected after -O\n");
2623 /* -oA: Set an argument for the bi command (sendmail's "alternate alias
2626 if (*argrest == 'A')
2628 alias_arg = argrest + 1;
2629 if (alias_arg[0] == 0)
2631 if (i+1 < argc) alias_arg = argv[++i]; else
2633 fprintf(stderr, "exim: string expected after -oA\n");
2639 /* -oB: Set a connection message max value for remote deliveries */
2641 else if (*argrest == 'B')
2643 uschar *p = argrest + 1;
2646 if (i+1 < argc && isdigit((argv[i+1][0]))) p = argv[++i]; else
2648 connection_max_messages = 1;
2657 fprintf(stderr, "exim: number expected after -oB\n");
2660 connection_max_messages = Uatoi(p);
2664 /* -odb: background delivery */
2666 else if (Ustrcmp(argrest, "db") == 0)
2668 synchronous_delivery = FALSE;
2669 arg_queue_only = FALSE;
2670 queue_only_set = TRUE;
2673 /* -odf: foreground delivery (smail-compatible option); same effect as
2674 -odi: interactive (synchronous) delivery (sendmail-compatible option)
2677 else if (Ustrcmp(argrest, "df") == 0 || Ustrcmp(argrest, "di") == 0)
2679 synchronous_delivery = TRUE;
2680 arg_queue_only = FALSE;
2681 queue_only_set = TRUE;
2684 /* -odq: queue only */
2686 else if (Ustrcmp(argrest, "dq") == 0)
2688 synchronous_delivery = FALSE;
2689 arg_queue_only = TRUE;
2690 queue_only_set = TRUE;
2693 /* -odqs: queue SMTP only - do local deliveries and remote routing,
2694 but no remote delivery */
2696 else if (Ustrcmp(argrest, "dqs") == 0)
2699 arg_queue_only = FALSE;
2700 queue_only_set = TRUE;
2703 /* -oex: Sendmail error flags. As these are also accepted without the
2704 leading -o prefix, for compatibility with vacation and other callers,
2705 they are handled with -e above. */
2707 /* -oi: Set flag so dot doesn't end non-SMTP input (same as -i)
2708 -oitrue: Another sendmail syntax for the same */
2710 else if (Ustrcmp(argrest, "i") == 0 ||
2711 Ustrcmp(argrest, "itrue") == 0)
2714 /* -oM*: Set various characteristics for an incoming message; actually
2715 acted on for trusted callers only. */
2717 else if (*argrest == 'M')
2721 fprintf(stderr, "exim: data expected after -o%s\n", argrest);
2725 /* -oMa: Set sender host address */
2727 if (Ustrcmp(argrest, "Ma") == 0) sender_host_address = argv[++i];
2729 /* -oMaa: Set authenticator name */
2731 else if (Ustrcmp(argrest, "Maa") == 0)
2732 sender_host_authenticated = argv[++i];
2734 /* -oMas: setting authenticated sender */
2736 else if (Ustrcmp(argrest, "Mas") == 0) authenticated_sender = argv[++i];
2738 /* -oMai: setting authenticated id */
2740 else if (Ustrcmp(argrest, "Mai") == 0) authenticated_id = argv[++i];
2742 /* -oMi: Set incoming interface address */
2744 else if (Ustrcmp(argrest, "Mi") == 0) interface_address = argv[++i];
2746 /* -oMr: Received protocol */
2748 else if (Ustrcmp(argrest, "Mr") == 0) received_protocol = argv[++i];
2750 /* -oMs: Set sender host name */
2752 else if (Ustrcmp(argrest, "Ms") == 0) sender_host_name = argv[++i];
2754 /* -oMt: Set sender ident */
2756 else if (Ustrcmp(argrest, "Mt") == 0)
2758 sender_ident_set = TRUE;
2759 sender_ident = argv[++i];
2762 /* Else a bad argument */
2771 /* -om: Me-too flag for aliases. Exim always does this. Some programs
2772 seem to call this as -m (undocumented), so that is also accepted (see
2775 else if (Ustrcmp(argrest, "m") == 0) {}
2777 /* -oo: An ancient flag for old-style addresses which still seems to
2778 crop up in some calls (see in SCO). */
2780 else if (Ustrcmp(argrest, "o") == 0) {}
2782 /* -oP <name>: set pid file path for daemon */
2784 else if (Ustrcmp(argrest, "P") == 0)
2785 override_pid_file_path = argv[++i];
2787 /* -or <n>: set timeout for non-SMTP acceptance
2788 -os <n>: set timeout for SMTP acceptance */
2790 else if (*argrest == 'r' || *argrest == 's')
2792 int *tp = (*argrest == 'r')?
2793 &arg_receive_timeout : &arg_smtp_receive_timeout;
2794 if (argrest[1] == 0)
2796 if (i+1 < argc) *tp= readconf_readtime(argv[++i], 0, FALSE);
2798 else *tp = readconf_readtime(argrest + 1, 0, FALSE);
2801 fprintf(stderr, "exim: bad time value %s: abandoned\n", argv[i]);
2806 /* -oX <list>: Override local_interfaces and/or default daemon ports */
2808 else if (Ustrcmp(argrest, "X") == 0)
2809 override_local_interfaces = argv[++i];
2811 /* Unknown -o argument */
2817 /* -ps: force Perl startup; -pd force delayed Perl startup */
2821 if (*argrest == 's' && argrest[1] == 0)
2823 perl_start_option = 1;
2826 if (*argrest == 'd' && argrest[1] == 0)
2828 perl_start_option = -1;
2833 /* -panythingelse is taken as the Sendmail-compatible argument -prval:sval,
2834 which sets the host protocol and host name */
2838 if (i+1 < argc) argrest = argv[++i]; else
2839 { badarg = TRUE; break; }
2844 uschar *hn = Ustrchr(argrest, ':');
2847 received_protocol = argrest;
2851 received_protocol = string_copyn(argrest, hn - argrest);
2852 sender_host_name = hn + 1;
2859 receiving_message = FALSE;
2860 if (queue_interval >= 0)
2862 fprintf(stderr, "exim: -q specified more than once\n");
2866 /* -qq...: Do queue runs in a 2-stage manner */
2868 if (*argrest == 'q')
2870 queue_2stage = TRUE;
2874 /* -qi...: Do only first (initial) deliveries */
2876 if (*argrest == 'i')
2878 queue_run_first_delivery = TRUE;
2882 /* -qf...: Run the queue, forcing deliveries
2883 -qff..: Ditto, forcing thawing as well */
2885 if (*argrest == 'f')
2887 queue_run_force = TRUE;
2888 if (*(++argrest) == 'f')
2890 deliver_force_thaw = TRUE;
2895 /* -q[f][f]l...: Run the queue only on local deliveries */
2897 if (*argrest == 'l')
2899 queue_run_local = TRUE;
2903 /* -q[f][f][l]: Run the queue, optionally forced, optionally local only,
2904 optionally starting from a given message id. */
2906 if (*argrest == 0 &&
2907 (i + 1 >= argc || argv[i+1][0] == '-' || mac_ismsgid(argv[i+1])))
2910 if (i+1 < argc && mac_ismsgid(argv[i+1]))
2911 start_queue_run_id = argv[++i];
2912 if (i+1 < argc && mac_ismsgid(argv[i+1]))
2913 stop_queue_run_id = argv[++i];
2916 /* -q[f][f][l]<n>: Run the queue at regular intervals, optionally forced,
2917 optionally local only. */
2922 queue_interval = readconf_readtime(argrest, 0, FALSE);
2924 queue_interval = readconf_readtime(argv[++i], 0, FALSE);
2925 if (queue_interval <= 0)
2927 fprintf(stderr, "exim: bad time value %s: abandoned\n", argv[i]);
2934 case 'R': /* Synonymous with -qR... */
2935 receiving_message = FALSE;
2937 /* -Rf: As -R (below) but force all deliveries,
2938 -Rff: Ditto, but also thaw all frozen messages,
2939 -Rr: String is regex
2940 -Rrf: Regex and force
2941 -Rrff: Regex and force and thaw
2943 in all cases provided there are no further characters in this
2949 for (i = 0; i < sizeof(rsopts)/sizeof(uschar *); i++)
2951 if (Ustrcmp(argrest, rsopts[i]) == 0)
2953 if (i != 2) queue_run_force = TRUE;
2954 if (i >= 2) deliver_selectstring_regex = TRUE;
2955 if (i == 1 || i == 4) deliver_force_thaw = TRUE;
2956 argrest += Ustrlen(rsopts[i]);
2961 /* -R: Set string to match in addresses for forced queue run to
2962 pick out particular messages. */
2966 if (i+1 < argc) deliver_selectstring = argv[++i]; else
2968 fprintf(stderr, "exim: string expected after -R\n");
2972 else deliver_selectstring = argrest;
2976 /* -r: an obsolete synonym for -f (see above) */
2979 /* -S: Like -R but works on sender. */
2981 case 'S': /* Synonymous with -qS... */
2982 receiving_message = FALSE;
2984 /* -Sf: As -S (below) but force all deliveries,
2985 -Sff: Ditto, but also thaw all frozen messages,
2986 -Sr: String is regex
2987 -Srf: Regex and force
2988 -Srff: Regex and force and thaw
2990 in all cases provided there are no further characters in this
2996 for (i = 0; i < sizeof(rsopts)/sizeof(uschar *); i++)
2998 if (Ustrcmp(argrest, rsopts[i]) == 0)
3000 if (i != 2) queue_run_force = TRUE;
3001 if (i >= 2) deliver_selectstring_sender_regex = TRUE;
3002 if (i == 1 || i == 4) deliver_force_thaw = TRUE;
3003 argrest += Ustrlen(rsopts[i]);
3008 /* -S: Set string to match in addresses for forced queue run to
3009 pick out particular messages. */
3013 if (i+1 < argc) deliver_selectstring_sender = argv[++i]; else
3015 fprintf(stderr, "exim: string expected after -S\n");
3019 else deliver_selectstring_sender = argrest;
3022 /* -Tqt is an option that is exclusively for use by the testing suite.
3023 It is not recognized in other circumstances. It allows for the setting up
3024 of explicit "queue times" so that various warning/retry things can be
3025 tested. Otherwise variability of clock ticks etc. cause problems. */
3028 if (running_in_test_harness && Ustrcmp(argrest, "qt") == 0)
3029 fudged_queue_times = argv[++i];
3034 /* -t: Set flag to extract recipients from body of message. */
3037 if (*argrest == 0) extract_recipients = TRUE;
3039 /* -ti: Set flag to extract recipients from body of message, and also
3040 specify that dot does not end the message. */
3042 else if (Ustrcmp(argrest, "i") == 0)
3044 extract_recipients = TRUE;
3048 /* -tls-on-connect: don't wait for STARTTLS (for old clients) */
3051 else if (Ustrcmp(argrest, "ls-on-connect") == 0) tls_on_connect = TRUE;
3058 /* -U: This means "initial user submission" in sendmail, apparently. The
3059 doc claims that in future sendmail may refuse syntactically invalid
3060 messages instead of fixing them. For the moment, we just ignore it. */
3066 /* -v: verify things - this is a very low-level debugging */
3071 debug_selector |= D_v;
3072 debug_file = stderr;
3078 /* -x: AIX uses this to indicate some fancy 8-bit character stuff:
3080 The -x flag tells the sendmail command that mail from a local
3081 mail program has National Language Support (NLS) extended characters
3082 in the body of the mail item. The sendmail command can send mail with
3083 extended NLS characters across networks that normally corrupts these
3086 As Exim is 8-bit clean, it just ignores this flag. */
3089 if (*argrest != 0) badarg = TRUE;
3092 /* All other initial characters are errors */
3097 } /* End of high-level switch statement */
3099 /* Failed to recognize the option, or syntax error */
3103 fprintf(stderr, "exim abandoned: unknown, malformed, or incomplete "
3104 "option %s\n", arg);
3110 /* If -R or -S have been specified without -q, assume a single queue run. */
3112 if ((deliver_selectstring != NULL || deliver_selectstring_sender != NULL) &&
3113 queue_interval < 0) queue_interval = 0;
3117 /* If usage_wanted is set we call the usage function - which never returns */
3118 if (usage_wanted) exim_usage(called_as);
3120 /* Arguments have been processed. Check for incompatibilities. */
3122 (smtp_input || extract_recipients || recipients_arg < argc) &&
3123 (daemon_listen || queue_interval >= 0 || bi_option ||
3124 test_retry_arg >= 0 || test_rewrite_arg >= 0 ||
3125 filter_test != FTEST_NONE || (msg_action_arg > 0 && !one_msg_action))
3128 msg_action_arg > 0 &&
3129 (daemon_listen || queue_interval >= 0 || list_options ||
3130 (checking && msg_action != MSG_LOAD) ||
3131 bi_option || test_retry_arg >= 0 || test_rewrite_arg >= 0)
3134 (daemon_listen || queue_interval >= 0) &&
3135 (sender_address != NULL || list_options || list_queue || checking ||
3139 daemon_listen && queue_interval == 0
3143 (checking || smtp_input || extract_recipients ||
3144 filter_test != FTEST_NONE || bi_option)
3147 verify_address_mode &&
3148 (address_test_mode || smtp_input || extract_recipients ||
3149 filter_test != FTEST_NONE || bi_option)
3152 address_test_mode && (smtp_input || extract_recipients ||
3153 filter_test != FTEST_NONE || bi_option)
3156 smtp_input && (sender_address != NULL || filter_test != FTEST_NONE ||
3160 deliver_selectstring != NULL && queue_interval < 0
3163 msg_action == MSG_LOAD &&
3164 (!expansion_test || expansion_test_message != NULL)
3168 fprintf(stderr, "exim: incompatible command-line options or arguments\n");
3172 /* If debugging is set up, set the file and the file descriptor to pass on to
3173 child processes. It should, of course, be 2 for stderr. Also, force the daemon
3174 to run in the foreground. */
3176 if (debug_selector != 0)
3178 debug_file = stderr;
3179 debug_fd = fileno(debug_file);
3180 background_daemon = FALSE;
3181 if (running_in_test_harness) millisleep(100); /* lets caller finish */
3182 if (debug_selector != D_v) /* -v only doesn't show this */
3184 debug_printf("Exim version %s uid=%ld gid=%ld pid=%d D=%x\n",
3185 version_string, (long int)real_uid, (long int)real_gid, (int)getpid(),
3187 if (!version_printed)
3188 show_whats_supported(stderr);
3192 /* When started with root privilege, ensure that the limits on the number of
3193 open files and the number of processes (where that is accessible) are
3194 sufficiently large, or are unset, in case Exim has been called from an
3195 environment where the limits are screwed down. Not all OS have the ability to
3196 change some of these limits. */
3200 DEBUG(D_any) debug_print_ids(US"Exim has no root privilege:");
3206 #ifdef RLIMIT_NOFILE
3207 if (getrlimit(RLIMIT_NOFILE, &rlp) < 0)
3209 log_write(0, LOG_MAIN|LOG_PANIC, "getrlimit(RLIMIT_NOFILE) failed: %s",
3211 rlp.rlim_cur = rlp.rlim_max = 0;
3214 /* I originally chose 1000 as a nice big number that was unlikely to
3215 be exceeded. It turns out that some older OS have a fixed upper limit of
3218 if (rlp.rlim_cur < 1000)
3220 rlp.rlim_cur = rlp.rlim_max = 1000;
3221 if (setrlimit(RLIMIT_NOFILE, &rlp) < 0)
3223 rlp.rlim_cur = rlp.rlim_max = 256;
3224 if (setrlimit(RLIMIT_NOFILE, &rlp) < 0)
3225 log_write(0, LOG_MAIN|LOG_PANIC, "setrlimit(RLIMIT_NOFILE) failed: %s",
3232 if (getrlimit(RLIMIT_NPROC, &rlp) < 0)
3234 log_write(0, LOG_MAIN|LOG_PANIC, "getrlimit(RLIMIT_NPROC) failed: %s",
3236 rlp.rlim_cur = rlp.rlim_max = 0;
3239 #ifdef RLIM_INFINITY
3240 if (rlp.rlim_cur != RLIM_INFINITY && rlp.rlim_cur < 1000)
3242 rlp.rlim_cur = rlp.rlim_max = RLIM_INFINITY;
3244 if (rlp.rlim_cur < 1000)
3246 rlp.rlim_cur = rlp.rlim_max = 1000;
3248 if (setrlimit(RLIMIT_NPROC, &rlp) < 0)
3249 log_write(0, LOG_MAIN|LOG_PANIC, "setrlimit(RLIMIT_NPROC) failed: %s",
3255 /* Exim is normally entered as root (but some special configurations are
3256 possible that don't do this). However, it always spins off sub-processes that
3257 set their uid and gid as required for local delivery. We don't want to pass on
3258 any extra groups that root may belong to, so we want to get rid of them all at
3261 We need to obey setgroups() at this stage, before possibly giving up root
3262 privilege for a changed configuration file, but later on we might need to
3263 check on the additional groups for the admin user privilege - can't do that
3264 till after reading the config, which might specify the exim gid. Therefore,
3265 save the group list here first. */
3267 group_count = getgroups(NGROUPS_MAX, group_list);
3269 /* There is a fundamental difference in some BSD systems in the matter of
3270 groups. FreeBSD and BSDI are known to be different; NetBSD and OpenBSD are
3271 known not to be different. On the "different" systems there is a single group
3272 list, and the first entry in it is the current group. On all other versions of
3273 Unix there is a supplementary group list, which is in *addition* to the current
3274 group. Consequently, to get rid of all extraneous groups on a "standard" system
3275 you pass over 0 groups to setgroups(), while on a "different" system you pass
3276 over a single group - the current group, which is always the first group in the
3277 list. Calling setgroups() with zero groups on a "different" system results in
3278 an error return. The following code should cope with both types of system.
3280 However, if this process isn't running as root, setgroups() can't be used
3281 since you have to be root to run it, even if throwing away groups. Not being
3282 root here happens only in some unusual configurations. We just ignore the
3285 if (setgroups(0, NULL) != 0)
3287 if (setgroups(1, group_list) != 0 && !unprivileged)
3289 fprintf(stderr, "exim: setgroups() failed: %s\n", strerror(errno));
3294 /* If the configuration file name has been altered by an argument on the
3295 command line (either a new file name or a macro definition) and the caller is
3296 not root, or if this is a filter testing run, remove any setuid privilege the
3297 program has and run as the underlying user.
3299 The exim user is locked out of this, which severely restricts the use of -C
3302 Otherwise, set the real ids to the effective values (should be root unless run
3303 from inetd, which it can either be root or the exim uid, if one is configured).
3305 There is a private mechanism for bypassing some of this, in order to make it
3306 possible to test lots of configurations automatically, without having either to
3307 recompile each time, or to patch in an actual configuration file name and other
3308 values (such as the path name). If running in the test harness, pretend that
3309 configuration file changes and macro definitions haven't happened. */
3312 (!trusted_config || /* Config changed, or */
3313 !macros_trusted()) && /* impermissible macros and */
3314 real_uid != root_uid && /* Not root, and */
3315 !running_in_test_harness /* Not fudged */
3317 expansion_test /* expansion testing */
3319 filter_test != FTEST_NONE) /* Filter testing */
3321 setgroups(group_count, group_list);
3322 exim_setugid(real_uid, real_gid, FALSE,
3323 US"-C, -D, -be or -bf forces real uid");
3324 removed_privilege = TRUE;
3326 /* In the normal case when Exim is called like this, stderr is available
3327 and should be used for any logging information because attempts to write
3328 to the log will usually fail. To arrange this, we unset really_exim. However,
3329 if no stderr is available there is no point - we might as well have a go
3330 at the log (if it fails, syslog will be written). */
3332 if (log_stderr != NULL) really_exim = FALSE;
3335 /* Privilege is to be retained for the moment. It may be dropped later,
3336 depending on the job that this Exim process has been asked to do. For now, set
3337 the real uid to the effective so that subsequent re-execs of Exim are done by a
3340 else exim_setugid(geteuid(), getegid(), FALSE, US"forcing real = effective");
3342 /* If testing a filter, open the file(s) now, before wasting time doing other
3343 setups and reading the message. */
3345 if ((filter_test & FTEST_SYSTEM) != 0)
3347 filter_sfd = Uopen(filter_test_sfile, O_RDONLY, 0);
3350 fprintf(stderr, "exim: failed to open %s: %s\n", filter_test_sfile,
3352 return EXIT_FAILURE;
3356 if ((filter_test & FTEST_USER) != 0)
3358 filter_ufd = Uopen(filter_test_ufile, O_RDONLY, 0);
3361 fprintf(stderr, "exim: failed to open %s: %s\n", filter_test_ufile,
3363 return EXIT_FAILURE;
3367 /* Read the main runtime configuration data; this gives up if there
3368 is a failure. It leaves the configuration file open so that the subsequent
3369 configuration data for delivery can be read if needed. */
3373 /* Handle the decoding of logging options. */
3375 decode_bits(&log_write_selector, &log_extra_selector, 0, 0,
3376 log_selector_string, log_options, log_options_count, US"log", 0);
3380 debug_printf("configuration file is %s\n", config_main_filename);
3381 debug_printf("log selectors = %08x %08x\n", log_write_selector,
3382 log_extra_selector);
3385 /* If domain literals are not allowed, check the sender address that was
3386 supplied with -f. Ditto for a stripped trailing dot. */
3388 if (sender_address != NULL)
3390 if (sender_address[sender_address_domain] == '[' && !allow_domain_literals)
3392 fprintf(stderr, "exim: bad -f address \"%s\": domain literals not "
3393 "allowed\n", sender_address);
3394 return EXIT_FAILURE;
3396 if (f_end_dot && !strip_trailing_dot)
3398 fprintf(stderr, "exim: bad -f address \"%s.\": domain is malformed "
3399 "(trailing dot not allowed)\n", sender_address);
3400 return EXIT_FAILURE;
3404 /* Paranoia check of maximum lengths of certain strings. There is a check
3405 on the length of the log file path in log.c, which will come into effect
3406 if there are any calls to write the log earlier than this. However, if we
3407 get this far but the string is very long, it is better to stop now than to
3408 carry on and (e.g.) receive a message and then have to collapse. The call to
3409 log_write() from here will cause the ultimate panic collapse if the complete
3410 file name exceeds the buffer length. */
3412 if (Ustrlen(log_file_path) > 200)
3413 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3414 "log_file_path is longer than 200 chars: aborting");
3416 if (Ustrlen(pid_file_path) > 200)
3417 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3418 "pid_file_path is longer than 200 chars: aborting");
3420 if (Ustrlen(spool_directory) > 200)
3421 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3422 "spool_directory is longer than 200 chars: aborting");
3424 /* Length check on the process name given to syslog for its TAG field,
3425 which is only permitted to be 32 characters or less. See RFC 3164. */
3427 if (Ustrlen(syslog_processname) > 32)
3428 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3429 "syslog_processname is longer than 32 chars: aborting");
3431 /* In some operating systems, the environment variable TMPDIR controls where
3432 temporary files are created; Exim doesn't use these (apart from when delivering
3433 to MBX mailboxes), but called libraries such as DBM libraries may require them.
3434 If TMPDIR is found in the environment, reset it to the value defined in the
3435 TMPDIR macro, if this macro is defined. */
3440 for (p = USS environ; *p != NULL; p++)
3442 if (Ustrncmp(*p, "TMPDIR=", 7) == 0 &&
3443 Ustrcmp(*p+7, TMPDIR) != 0)
3445 uschar *newp = malloc(Ustrlen(TMPDIR) + 8);
3446 sprintf(CS newp, "TMPDIR=%s", TMPDIR);
3448 DEBUG(D_any) debug_printf("reset TMPDIR=%s in environment\n", TMPDIR);
3454 /* Timezone handling. If timezone_string is "utc", set a flag to cause all
3455 timestamps to be in UTC (gmtime() is used instead of localtime()). Otherwise,
3456 we may need to get rid of a bogus timezone setting. This can arise when Exim is
3457 called by a user who has set the TZ variable. This then affects the timestamps
3458 in log files and in Received: headers, and any created Date: header lines. The
3459 required timezone is settable in the configuration file, so nothing can be done
3460 about this earlier - but hopefully nothing will normally be logged earlier than
3461 this. We have to make a new environment if TZ is wrong, but don't bother if
3462 timestamps_utc is set, because then all times are in UTC anyway. */
3464 if (timezone_string != NULL && strcmpic(timezone_string, US"UTC") == 0)
3466 timestamps_utc = TRUE;
3470 uschar *envtz = US getenv("TZ");
3471 if ((envtz == NULL && timezone_string != NULL) ||
3473 (timezone_string == NULL ||
3474 Ustrcmp(timezone_string, envtz) != 0)))
3476 uschar **p = USS environ;
3480 while (*p++ != NULL) count++;
3481 if (envtz == NULL) count++;
3482 newp = new = malloc(sizeof(uschar *) * (count + 1));
3483 for (p = USS environ; *p != NULL; p++)
3485 if (Ustrncmp(*p, "TZ=", 3) == 0) continue;
3488 if (timezone_string != NULL)
3490 *newp = malloc(Ustrlen(timezone_string) + 4);
3491 sprintf(CS *newp++, "TZ=%s", timezone_string);
3496 DEBUG(D_any) debug_printf("Reset TZ to %s: time is %s\n", timezone_string,
3497 tod_stamp(tod_log));
3501 /* Handle the case when we have removed the setuid privilege because of -C or
3502 -D. This means that the caller of Exim was not root.
3504 There is a problem if we were running as the Exim user. The sysadmin may
3505 expect this case to retain privilege because "the binary was called by the
3506 Exim user", but it hasn't, because either the -D option set macros, or the
3507 -C option set a non-trusted configuration file. There are two possibilities:
3509 (1) If deliver_drop_privilege is set, Exim is not going to re-exec in order
3510 to do message deliveries. Thus, the fact that it is running as a
3511 non-privileged user is plausible, and might be wanted in some special
3512 configurations. However, really_exim will have been set false when
3513 privilege was dropped, to stop Exim trying to write to its normal log
3514 files. Therefore, re-enable normal log processing, assuming the sysadmin
3515 has set up the log directory correctly.
3517 (2) If deliver_drop_privilege is not set, the configuration won't work as
3518 apparently intended, and so we log a panic message. In order to retain
3519 root for -C or -D, the caller must either be root or be invoking a
3520 trusted configuration file (when deliver_drop_privilege is false). */
3522 if (removed_privilege && (!trusted_config || macros != NULL) &&
3523 real_uid == exim_uid)
3525 if (deliver_drop_privilege)
3526 really_exim = TRUE; /* let logging work normally */
3528 log_write(0, LOG_MAIN|LOG_PANIC,
3529 "exim user lost privilege for using %s option",
3530 trusted_config? "-D" : "-C");
3533 /* Start up Perl interpreter if Perl support is configured and there is a
3534 perl_startup option, and the configuration or the command line specifies
3535 initializing starting. Note that the global variables are actually called
3536 opt_perl_xxx to avoid clashing with perl's namespace (perl_*). */
3539 if (perl_start_option != 0)
3540 opt_perl_at_start = (perl_start_option > 0);
3541 if (opt_perl_at_start && opt_perl_startup != NULL)
3544 DEBUG(D_any) debug_printf("Starting Perl interpreter\n");
3545 errstr = init_perl(opt_perl_startup);
3548 fprintf(stderr, "exim: error in perl_startup code: %s\n", errstr);
3549 return EXIT_FAILURE;
3551 opt_perl_started = TRUE;
3553 #endif /* EXIM_PERL */
3555 /* Initialise lookup_list
3556 If debugging, already called above via version reporting.
3557 This does mean that debugging causes the list to be initialised while root.
3558 This *should* be harmless -- all modules are loaded from a fixed dir and
3559 it's code that would, if not a module, be part of Exim already. */
3562 /* Log the arguments of the call if the configuration file said so. This is
3563 a debugging feature for finding out what arguments certain MUAs actually use.
3564 Don't attempt it if logging is disabled, or if listing variables or if
3565 verifying/testing addresses or expansions. */
3567 if (((debug_selector & D_any) != 0 || (log_extra_selector & LX_arguments) != 0)
3568 && really_exim && !list_options && !checking)
3571 uschar *p = big_buffer;
3573 (void)getcwd(CS p+4, big_buffer_size - 4);
3575 (void)string_format(p, big_buffer_size - (p - big_buffer), " %d args:", argc);
3577 for (i = 0; i < argc; i++)
3579 int len = Ustrlen(argv[i]);
3582 if (p + len + 8 >= big_buffer + big_buffer_size)
3585 log_write(0, LOG_MAIN, "%s", big_buffer);
3586 Ustrcpy(big_buffer, "...");
3589 printing = string_printing(argv[i]);
3590 if (printing[0] == 0) quote = US"\""; else
3592 uschar *pp = printing;
3594 while (*pp != 0) if (isspace(*pp++)) { quote = US"\""; break; }
3596 sprintf(CS p, " %s%.*s%s", quote, (int)(big_buffer_size -
3597 (p - big_buffer) - 4), printing, quote);
3601 if ((log_extra_selector & LX_arguments) != 0)
3602 log_write(0, LOG_MAIN, "%s", big_buffer);
3604 debug_printf("%s\n", big_buffer);
3607 /* Set the working directory to be the top-level spool directory. We don't rely
3608 on this in the code, which always uses fully qualified names, but it's useful
3609 for core dumps etc. Don't complain if it fails - the spool directory might not
3610 be generally accessible and calls with the -C option (and others) have lost
3611 privilege by now. Before the chdir, we try to ensure that the directory exists.
3614 if (Uchdir(spool_directory) != 0)
3616 (void)directory_make(spool_directory, US"", SPOOL_DIRECTORY_MODE, FALSE);
3617 (void)Uchdir(spool_directory);
3620 /* Handle calls with the -bi option. This is a sendmail option to rebuild *the*
3621 alias file. Exim doesn't have such a concept, but this call is screwed into
3622 Sun's YP makefiles. Handle this by calling a configured script, as the real
3623 user who called Exim. The -oA option can be used to pass an argument to the
3628 (void)fclose(config_file);
3629 if (bi_command != NULL)
3633 argv[i++] = bi_command;
3634 if (alias_arg != NULL) argv[i++] = alias_arg;
3637 setgroups(group_count, group_list);
3638 exim_setugid(real_uid, real_gid, FALSE, US"running bi_command");
3640 DEBUG(D_exec) debug_printf("exec %.256s %.256s\n", argv[0],
3641 (argv[1] == NULL)? US"" : argv[1]);
3643 execv(CS argv[0], (char *const *)argv);
3644 fprintf(stderr, "exim: exec failed: %s\n", strerror(errno));
3649 DEBUG(D_any) debug_printf("-bi used but bi_command not set; exiting\n");
3654 /* If an action on specific messages is requested, or if a daemon or queue
3655 runner is being started, we need to know if Exim was called by an admin user.
3656 This is the case if the real user is root or exim, or if the real group is
3657 exim, or if one of the supplementary groups is exim or a group listed in
3658 admin_groups. We don't fail all message actions immediately if not admin_user,
3659 since some actions can be performed by non-admin users. Instead, set admin_user
3660 for later interrogation. */
3662 if (real_uid == root_uid || real_uid == exim_uid || real_gid == exim_gid)
3667 for (i = 0; i < group_count; i++)
3669 if (group_list[i] == exim_gid) admin_user = TRUE;
3670 else if (admin_groups != NULL)
3672 for (j = 1; j <= (int)(admin_groups[0]); j++)
3673 if (admin_groups[j] == group_list[i])
3674 { admin_user = TRUE; break; }
3676 if (admin_user) break;
3680 /* Another group of privileged users are the trusted users. These are root,
3681 exim, and any caller matching trusted_users or trusted_groups. Trusted callers
3682 are permitted to specify sender_addresses with -f on the command line, and
3683 other message parameters as well. */
3685 if (real_uid == root_uid || real_uid == exim_uid)
3686 trusted_caller = TRUE;
3691 if (trusted_users != NULL)
3693 for (i = 1; i <= (int)(trusted_users[0]); i++)
3694 if (trusted_users[i] == real_uid)
3695 { trusted_caller = TRUE; break; }
3698 if (!trusted_caller && trusted_groups != NULL)
3700 for (i = 1; i <= (int)(trusted_groups[0]); i++)
3702 if (trusted_groups[i] == real_gid)
3703 trusted_caller = TRUE;
3704 else for (j = 0; j < group_count; j++)
3706 if (trusted_groups[i] == group_list[j])
3707 { trusted_caller = TRUE; break; }
3709 if (trusted_caller) break;
3714 if (trusted_caller) DEBUG(D_any) debug_printf("trusted user\n");
3715 if (admin_user) DEBUG(D_any) debug_printf("admin user\n");
3717 /* Only an admin user may start the daemon or force a queue run in the default
3718 configuration, but the queue run restriction can be relaxed. Only an admin
3719 user may request that a message be returned to its sender forthwith. Only an
3720 admin user may specify a debug level greater than D_v (because it might show
3721 passwords, etc. in lookup queries). Only an admin user may request a queue
3722 count. Only an admin user can use the test interface to scan for email
3723 (because Exim will be in the spool dir and able to look at mails). */
3727 BOOL debugset = (debug_selector & ~D_v) != 0;
3728 if (deliver_give_up || daemon_listen || malware_test_file ||
3729 (count_queue && queue_list_requires_admin) ||
3730 (list_queue && queue_list_requires_admin) ||
3731 (queue_interval >= 0 && prod_requires_admin) ||
3732 (debugset && !running_in_test_harness))
3734 fprintf(stderr, "exim:%s permission denied\n", debugset? " debugging" : "");
3739 /* If the real user is not root or the exim uid, the argument for passing
3740 in an open TCP/IP connection for another message is not permitted, nor is
3741 running with the -N option for any delivery action, unless this call to exim is
3742 one that supplied an input message, or we are using a patched exim for
3743 regression testing. */
3745 if (real_uid != root_uid && real_uid != exim_uid &&
3746 (continue_hostname != NULL ||
3748 (queue_interval >= 0 || daemon_listen || msg_action_arg > 0)
3749 )) && !running_in_test_harness)
3751 fprintf(stderr, "exim: Permission denied\n");
3752 return EXIT_FAILURE;
3755 /* If the caller is not trusted, certain arguments are ignored when running for
3756 real, but are permitted when checking things (-be, -bv, -bt, -bh, -bf, -bF).
3757 Note that authority for performing certain actions on messages is tested in the
3758 queue_action() function. */
3760 if (!trusted_caller && !checking && filter_test == FTEST_NONE)
3762 sender_host_name = sender_host_address = interface_address =
3763 sender_ident = received_protocol = NULL;
3764 sender_host_port = interface_port = 0;
3765 sender_host_authenticated = authenticated_sender = authenticated_id = NULL;
3768 /* If a sender host address is set, extract the optional port number off the
3769 end of it and check its syntax. Do the same thing for the interface address.
3770 Exim exits if the syntax is bad. */
3774 if (sender_host_address != NULL)
3775 sender_host_port = check_port(sender_host_address);
3776 if (interface_address != NULL)
3777 interface_port = check_port(interface_address);
3780 /* If an SMTP message is being received check to see if the standard input is a
3781 TCP/IP socket. If it is, we assume that Exim was called from inetd if the
3782 caller is root or the Exim user, or if the port is a privileged one. Otherwise,
3787 union sockaddr_46 inetd_sock;
3788 EXIM_SOCKLEN_T size = sizeof(inetd_sock);
3789 if (getpeername(0, (struct sockaddr *)(&inetd_sock), &size) == 0)
3791 int family = ((struct sockaddr *)(&inetd_sock))->sa_family;
3792 if (family == AF_INET || family == AF_INET6)
3794 union sockaddr_46 interface_sock;
3795 size = sizeof(interface_sock);
3797 if (getsockname(0, (struct sockaddr *)(&interface_sock), &size) == 0)
3798 interface_address = host_ntoa(-1, &interface_sock, NULL,
3801 if (host_is_tls_on_connect_port(interface_port)) tls_on_connect = TRUE;
3803 if (real_uid == root_uid || real_uid == exim_uid || interface_port < 1024)
3806 sender_host_address = host_ntoa(-1, (struct sockaddr *)(&inetd_sock),
3807 NULL, &sender_host_port);
3808 if (mua_wrapper) log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Input from "
3809 "inetd is not supported when mua_wrapper is set");
3814 "exim: Permission denied (unprivileged user, unprivileged port)\n");
3815 return EXIT_FAILURE;
3821 /* If the load average is going to be needed while receiving a message, get it
3822 now for those OS that require the first call to os_getloadavg() to be done as
3823 root. There will be further calls later for each message received. */
3825 #ifdef LOAD_AVG_NEEDS_ROOT
3826 if (receiving_message &&
3827 (queue_only_load >= 0 ||
3828 (is_inetd && smtp_load_reserve >= 0)
3831 load_average = OS_GETLOADAVG();
3835 /* The queue_only configuration option can be overridden by -odx on the command
3836 line, except that if queue_only_override is false, queue_only cannot be unset
3837 from the command line. */
3839 if (queue_only_set && (queue_only_override || arg_queue_only))
3840 queue_only = arg_queue_only;
3842 /* The receive_timeout and smtp_receive_timeout options can be overridden by
3845 if (arg_receive_timeout >= 0) receive_timeout = arg_receive_timeout;
3846 if (arg_smtp_receive_timeout >= 0)
3847 smtp_receive_timeout = arg_smtp_receive_timeout;
3849 /* If Exim was started with root privilege, unless we have already removed the
3850 root privilege above as a result of -C, -D, -be, -bf or -bF, remove it now
3851 except when starting the daemon or doing some kind of delivery or address
3852 testing (-bt). These are the only cases when root need to be retained. We run
3853 as exim for -bv and -bh. However, if deliver_drop_privilege is set, root is
3854 retained only for starting the daemon. We always do the initgroups() in this
3855 situation (controlled by the TRUE below), in order to be as close as possible
3856 to the state Exim usually runs in. */
3858 if (!unprivileged && /* originally had root AND */
3859 !removed_privilege && /* still got root AND */
3860 !daemon_listen && /* not starting the daemon */
3861 queue_interval <= 0 && /* (either kind of daemon) */
3863 deliver_drop_privilege || /* requested unprivileged */
3865 queue_interval < 0 && /* not running the queue */
3866 (msg_action_arg < 0 || /* and */
3867 msg_action != MSG_DELIVER) && /* not delivering and */
3868 (!checking || !address_test_mode) /* not address checking */
3872 exim_setugid(exim_uid, exim_gid, TRUE, US"privilege not needed");
3875 /* When we are retaining a privileged uid, we still change to the exim gid. */
3880 rv = setgid(exim_gid);
3881 /* Impact of failure is that some stuff might end up with an incorrect group.
3882 We track this for failures from root, since any attempt to change privilege
3883 by root should succeed and failures should be examined. For non-root,
3884 there's no security risk. For me, it's { exim -bV } on a just-built binary,
3885 no need to complain then. */
3888 if (!(unprivileged || removed_privilege))
3891 "exim: changing group failed: %s\n", strerror(errno));
3895 DEBUG(D_any) debug_printf("changing group to %ld failed: %s\n",
3896 (long int)exim_gid, strerror(errno));
3900 /* Handle a request to scan a file for malware */
3901 if (malware_test_file)
3903 #ifdef WITH_CONTENT_SCAN
3905 set_process_info("scanning file for malware");
3906 result = malware_in_file(malware_test_file);
3909 printf("No malware found.\n");
3914 printf("Malware lookup returned non-okay/fail: %d\n", result);
3918 printf("Malware found: %s\n", malware_name);
3920 printf("Malware scan detected malware of unknown name.\n");
3922 printf("Malware scanning not enabled at compile time.\n");
3927 /* Handle a request to list the delivery queue */
3931 set_process_info("listing the queue");
3932 queue_list(list_queue_option, argv + recipients_arg, argc - recipients_arg);
3936 /* Handle a request to count the delivery queue */
3940 set_process_info("counting the queue");
3945 /* Handle actions on specific messages, except for the force delivery and
3946 message load actions, which are done below. Some actions take a whole list of
3947 message ids, which are known to continue up to the end of the arguments. Others
3948 take a single message id and then operate on the recipients list. */
3950 if (msg_action_arg > 0 && msg_action != MSG_DELIVER && msg_action != MSG_LOAD)
3952 int yield = EXIT_SUCCESS;
3953 set_process_info("acting on specified messages");
3955 if (!one_msg_action)
3957 for (i = msg_action_arg; i < argc; i++)
3958 if (!queue_action(argv[i], msg_action, NULL, 0, 0))
3959 yield = EXIT_FAILURE;
3962 else if (!queue_action(argv[msg_action_arg], msg_action, argv, argc,
3963 recipients_arg)) yield = EXIT_FAILURE;
3967 /* All the modes below here require the remaining configuration sections
3968 to be read, except that we can skip over the ACL setting when delivering
3969 specific messages, or doing a queue run. (For various testing cases we could
3970 skip too, but as they are rare, it doesn't really matter.) The argument is TRUE
3973 readconf_rest(msg_action_arg > 0 || (queue_interval == 0 && !daemon_listen));
3975 /* The configuration data will have been read into POOL_PERM because we won't
3976 ever want to reset back past it. Change the current pool to POOL_MAIN. In fact,
3977 this is just a bit of pedantic tidiness. It wouldn't really matter if the
3978 configuration were read into POOL_MAIN, because we don't do any resets till
3979 later on. However, it seems right, and it does ensure that both pools get used.
3982 store_pool = POOL_MAIN;
3984 /* Handle the -brt option. This is for checking out retry configurations.
3985 The next three arguments are a domain name or a complete address, and
3986 optionally two error numbers. All it does is to call the function that
3987 scans the retry configuration data. */
3989 if (test_retry_arg >= 0)
3991 retry_config *yield;
3992 int basic_errno = 0;
3996 if (test_retry_arg >= argc)
3998 printf("-brt needs a domain or address argument\n");
3999 exim_exit(EXIT_FAILURE);
4001 s1 = argv[test_retry_arg++];
4004 /* If the first argument contains no @ and no . it might be a local user
4005 or it might be a single-component name. Treat as a domain. */
4007 if (Ustrchr(s1, '@') == NULL && Ustrchr(s1, '.') == NULL)
4009 printf("Warning: \"%s\" contains no '@' and no '.' characters. It is "
4010 "being \ntreated as a one-component domain, not as a local part.\n\n",
4014 /* There may be an optional second domain arg. */
4016 if (test_retry_arg < argc && Ustrchr(argv[test_retry_arg], '.') != NULL)
4017 s2 = argv[test_retry_arg++];
4019 /* The final arg is an error name */
4021 if (test_retry_arg < argc)
4023 uschar *ss = argv[test_retry_arg];
4025 readconf_retry_error(ss, ss + Ustrlen(ss), &basic_errno, &more_errno);
4028 printf("%s\n", CS error);
4029 return EXIT_FAILURE;
4032 /* For the {MAIL,RCPT,DATA}_4xx errors, a value of 255 means "any", and a
4033 code > 100 as an error is for matching codes to the decade. Turn them into
4034 a real error code, off the decade. */
4036 if (basic_errno == ERRNO_MAIL4XX ||
4037 basic_errno == ERRNO_RCPT4XX ||
4038 basic_errno == ERRNO_DATA4XX)
4040 int code = (more_errno >> 8) & 255;
4042 more_errno = (more_errno & 0xffff00ff) | (21 << 8);
4043 else if (code > 100)
4044 more_errno = (more_errno & 0xffff00ff) | ((code - 96) << 8);
4048 yield = retry_find_config(s1, s2, basic_errno, more_errno);
4049 if (yield == NULL) printf("No retry information found\n"); else
4052 more_errno = yield->more_errno;
4053 printf("Retry rule: %s ", yield->pattern);
4055 if (yield->basic_errno == ERRNO_EXIMQUOTA)
4057 printf("quota%s%s ",
4058 (more_errno > 0)? "_" : "",
4059 (more_errno > 0)? readconf_printtime(more_errno) : US"");
4061 else if (yield->basic_errno == ECONNREFUSED)
4063 printf("refused%s%s ",
4064 (more_errno > 0)? "_" : "",
4065 (more_errno == 'M')? "MX" :
4066 (more_errno == 'A')? "A" : "");
4068 else if (yield->basic_errno == ETIMEDOUT)
4071 if ((more_errno & RTEF_CTOUT) != 0) printf("_connect");
4073 if (more_errno != 0) printf("_%s",
4074 (more_errno == 'M')? "MX" : "A");
4077 else if (yield->basic_errno == ERRNO_AUTHFAIL)
4078 printf("auth_failed ");
4081 for (r = yield->rules; r != NULL; r = r->next)
4083 printf("%c,%s", r->rule, readconf_printtime(r->timeout)); /* Do not */
4084 printf(",%s", readconf_printtime(r->p1)); /* amalgamate */
4090 printf(",%d.", x/1000);
4104 exim_exit(EXIT_SUCCESS);
4107 /* Handle a request to list one or more configuration options */
4111 set_process_info("listing variables");
4112 if (recipients_arg >= argc) readconf_print(US"all", NULL);
4113 else for (i = recipients_arg; i < argc; i++)
4116 (Ustrcmp(argv[i], "router") == 0 ||
4117 Ustrcmp(argv[i], "transport") == 0 ||
4118 Ustrcmp(argv[i], "authenticator") == 0 ||
4119 Ustrcmp(argv[i], "macro") == 0))
4121 readconf_print(argv[i+1], argv[i]);
4124 else readconf_print(argv[i], NULL);
4126 exim_exit(EXIT_SUCCESS);
4130 /* Handle a request to deliver one or more messages that are already on the
4131 queue. Values of msg_action other than MSG_DELIVER and MSG_LOAD are dealt with
4132 above. MSG_LOAD is handled with -be (which is the only time it applies) below.
4134 Delivery of specific messages is typically used for a small number when
4135 prodding by hand (when the option forced_delivery will be set) or when
4136 re-execing to regain root privilege. Each message delivery must happen in a
4137 separate process, so we fork a process for each one, and run them sequentially
4138 so that debugging output doesn't get intertwined, and to avoid spawning too
4139 many processes if a long list is given. However, don't fork for the last one;
4140 this saves a process in the common case when Exim is called to deliver just one
4143 if (msg_action_arg > 0 && msg_action != MSG_LOAD)
4145 if (prod_requires_admin && !admin_user)
4147 fprintf(stderr, "exim: Permission denied\n");
4148 exim_exit(EXIT_FAILURE);
4150 set_process_info("delivering specified messages");
4151 if (deliver_give_up) forced_delivery = deliver_force_thaw = TRUE;
4152 for (i = msg_action_arg; i < argc; i++)
4157 (void)deliver_message(argv[i], forced_delivery, deliver_give_up);
4158 else if ((pid = fork()) == 0)
4160 (void)deliver_message(argv[i], forced_delivery, deliver_give_up);
4161 _exit(EXIT_SUCCESS);
4165 fprintf(stderr, "failed to fork delivery process for %s: %s\n", argv[i],
4167 exim_exit(EXIT_FAILURE);
4171 exim_exit(EXIT_SUCCESS);
4175 /* If only a single queue run is requested, without SMTP listening, we can just
4176 turn into a queue runner, with an optional starting message id. */
4178 if (queue_interval == 0 && !daemon_listen)
4180 DEBUG(D_queue_run) debug_printf("Single queue run%s%s%s%s\n",
4181 (start_queue_run_id == NULL)? US"" : US" starting at ",
4182 (start_queue_run_id == NULL)? US"" : start_queue_run_id,
4183 (stop_queue_run_id == NULL)? US"" : US" stopping at ",
4184 (stop_queue_run_id == NULL)? US"" : stop_queue_run_id);
4185 set_process_info("running the queue (single queue run)");
4186 queue_run(start_queue_run_id, stop_queue_run_id, FALSE);
4187 exim_exit(EXIT_SUCCESS);
4191 /* Find the login name of the real user running this process. This is always
4192 needed when receiving a message, because it is written into the spool file. It
4193 may also be used to construct a from: or a sender: header, and in this case we
4194 need the user's full name as well, so save a copy of it, checked for RFC822
4195 syntax and munged if necessary, if it hasn't previously been set by the -F
4196 argument. We may try to get the passwd entry more than once, in case NIS or
4197 other delays are in evidence. Save the home directory for use in filter testing
4202 if ((pw = getpwuid(real_uid)) != NULL)
4204 originator_login = string_copy(US pw->pw_name);
4205 originator_home = string_copy(US pw->pw_dir);
4207 /* If user name has not been set by -F, set it from the passwd entry
4208 unless -f has been used to set the sender address by a trusted user. */
4210 if (originator_name == NULL)
4212 if (sender_address == NULL ||
4213 (!trusted_caller && filter_test == FTEST_NONE))
4215 uschar *name = US pw->pw_gecos;
4216 uschar *amp = Ustrchr(name, '&');
4219 /* Most Unix specify that a '&' character in the gecos field is
4220 replaced by a copy of the login name, and some even specify that
4221 the first character should be upper cased, so that's what we do. */
4226 string_format(buffer, sizeof(buffer), "%.*s%n%s%s",
4227 amp - name, name, &loffset, originator_login, amp + 1);
4228 buffer[loffset] = toupper(buffer[loffset]);
4232 /* If a pattern for matching the gecos field was supplied, apply
4233 it and then expand the name string. */
4235 if (gecos_pattern != NULL && gecos_name != NULL)
4238 re = regex_must_compile(gecos_pattern, FALSE, TRUE); /* Use malloc */
4240 if (regex_match_and_setup(re, name, 0, -1))
4242 uschar *new_name = expand_string(gecos_name);
4244 if (new_name != NULL)
4246 DEBUG(D_receive) debug_printf("user name \"%s\" extracted from "
4247 "gecos field \"%s\"\n", new_name, name);
4250 else DEBUG(D_receive) debug_printf("failed to expand gecos_name string "
4251 "\"%s\": %s\n", gecos_name, expand_string_message);
4253 else DEBUG(D_receive) debug_printf("gecos_pattern \"%s\" did not match "
4254 "gecos field \"%s\"\n", gecos_pattern, name);
4255 store_free((void *)re);
4257 originator_name = string_copy(name);
4260 /* A trusted caller has used -f but not -F */
4262 else originator_name = US"";
4265 /* Break the retry loop */
4270 if (++i > finduser_retries) break;
4274 /* If we cannot get a user login, log the incident and give up, unless the
4275 configuration specifies something to use. When running in the test harness,
4276 any setting of unknown_login overrides the actual name. */
4278 if (originator_login == NULL || running_in_test_harness)
4280 if (unknown_login != NULL)
4282 originator_login = expand_string(unknown_login);
4283 if (originator_name == NULL && unknown_username != NULL)
4284 originator_name = expand_string(unknown_username);
4285 if (originator_name == NULL) originator_name = US"";
4287 if (originator_login == NULL)
4288 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Failed to get user name for uid %d",
4292 /* Ensure that the user name is in a suitable form for use as a "phrase" in an
4295 originator_name = string_copy(parse_fix_phrase(originator_name,
4296 Ustrlen(originator_name), big_buffer, big_buffer_size));
4298 /* If a message is created by this call of Exim, the uid/gid of its originator
4299 are those of the caller. These values are overridden if an existing message is
4300 read in from the spool. */
4302 originator_uid = real_uid;
4303 originator_gid = real_gid;
4305 DEBUG(D_receive) debug_printf("originator: uid=%d gid=%d login=%s name=%s\n",
4306 (int)originator_uid, (int)originator_gid, originator_login, originator_name);
4308 /* Run in daemon and/or queue-running mode. The function daemon_go() never
4309 returns. We leave this till here so that the originator_ fields are available
4310 for incoming messages via the daemon. The daemon cannot be run in mua_wrapper
4313 if (daemon_listen || queue_interval > 0)
4317 fprintf(stderr, "Daemon cannot be run when mua_wrapper is set\n");
4318 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Daemon cannot be run when "
4319 "mua_wrapper is set");
4324 /* If the sender ident has not been set (by a trusted caller) set it to
4325 the caller. This will get overwritten below for an inetd call. If a trusted
4326 caller has set it empty, unset it. */
4328 if (sender_ident == NULL) sender_ident = originator_login;
4329 else if (sender_ident[0] == 0) sender_ident = NULL;
4331 /* Handle the -brw option, which is for checking out rewriting rules. Cause log
4332 writes (on errors) to go to stderr instead. Can't do this earlier, as want the
4333 originator_* variables set. */
4335 if (test_rewrite_arg >= 0)
4337 really_exim = FALSE;
4338 if (test_rewrite_arg >= argc)
4340 printf("-brw needs an address argument\n");
4341 exim_exit(EXIT_FAILURE);
4343 rewrite_test(argv[test_rewrite_arg]);
4344 exim_exit(EXIT_SUCCESS);
4347 /* A locally-supplied message is considered to be coming from a local user
4348 unless a trusted caller supplies a sender address with -f, or is passing in the
4349 message via SMTP (inetd invocation or otherwise). */
4351 if ((sender_address == NULL && !smtp_input) ||
4352 (!trusted_caller && filter_test == FTEST_NONE))
4354 sender_local = TRUE;
4356 /* A trusted caller can supply authenticated_sender and authenticated_id
4357 via -oMas and -oMai and if so, they will already be set. Otherwise, force
4358 defaults except when host checking. */
4360 if (authenticated_sender == NULL && !host_checking)
4361 authenticated_sender = string_sprintf("%s@%s", originator_login,
4362 qualify_domain_sender);
4363 if (authenticated_id == NULL && !host_checking)
4364 authenticated_id = originator_login;
4367 /* Trusted callers are always permitted to specify the sender address.
4368 Untrusted callers may specify it if it matches untrusted_set_sender, or if what
4369 is specified is the empty address. However, if a trusted caller does not
4370 specify a sender address for SMTP input, we leave sender_address unset. This
4371 causes the MAIL commands to be honoured. */
4373 if ((!smtp_input && sender_address == NULL) ||
4374 !receive_check_set_sender(sender_address))
4376 /* Either the caller is not permitted to set a general sender, or this is
4377 non-SMTP input and the trusted caller has not set a sender. If there is no
4378 sender, or if a sender other than <> is set, override with the originator's
4379 login (which will get qualified below), except when checking things. */
4381 if (sender_address == NULL /* No sender_address set */
4383 (sender_address[0] != 0 && /* Non-empty sender address, AND */
4384 !checking && /* Not running tests, AND */
4385 filter_test == FTEST_NONE)) /* Not testing a filter */
4387 sender_address = originator_login;
4388 sender_address_forced = FALSE;
4389 sender_address_domain = 0;
4393 /* Remember whether an untrusted caller set the sender address */
4395 sender_set_untrusted = sender_address != originator_login && !trusted_caller;
4397 /* Ensure that the sender address is fully qualified unless it is the empty
4398 address, which indicates an error message, or doesn't exist (root caller, smtp
4399 interface, no -f argument). */
4401 if (sender_address != NULL && sender_address[0] != 0 &&
4402 sender_address_domain == 0)
4403 sender_address = string_sprintf("%s@%s", local_part_quote(sender_address),
4404 qualify_domain_sender);
4406 DEBUG(D_receive) debug_printf("sender address = %s\n", sender_address);
4408 /* Handle a request to verify a list of addresses, or test them for delivery.
4409 This must follow the setting of the sender address, since routers can be
4410 predicated upon the sender. If no arguments are given, read addresses from
4411 stdin. Set debug_level to at least D_v to get full output for address testing.
4414 if (verify_address_mode || address_test_mode)
4417 int flags = vopt_qualify;
4419 if (verify_address_mode)
4421 if (!verify_as_sender) flags |= vopt_is_recipient;
4422 DEBUG(D_verify) debug_print_ids(US"Verifying:");
4427 flags |= vopt_is_recipient;
4428 debug_selector |= D_v;
4429 debug_file = stderr;
4430 debug_fd = fileno(debug_file);
4431 DEBUG(D_verify) debug_print_ids(US"Address testing:");
4434 if (recipients_arg < argc)
4436 while (recipients_arg < argc)
4438 uschar *s = argv[recipients_arg++];
4441 BOOL finished = FALSE;
4442 uschar *ss = parse_find_address_end(s, FALSE);
4443 if (*ss == ',') *ss = 0; else finished = TRUE;
4444 test_address(s, flags, &exit_value);
4447 while (*(++s) != 0 && (*s == ',' || isspace(*s)));
4454 uschar *s = get_stdinput(NULL, NULL);
4455 if (s == NULL) break;
4456 test_address(s, flags, &exit_value);
4460 exim_exit(exit_value);
4463 /* Handle expansion checking. Either expand items on the command line, or read
4464 from stdin if there aren't any. If -Mset was specified, load the message so
4465 that its variables can be used, but restrict this facility to admin users.
4466 Otherwise, if -bem was used, read a message from stdin. */
4470 if (msg_action_arg > 0 && msg_action == MSG_LOAD)
4472 uschar spoolname[256]; /* Not big_buffer; used in spool_read_header() */
4475 fprintf(stderr, "exim: permission denied\n");
4478 message_id = argv[msg_action_arg];
4479 (void)string_format(spoolname, sizeof(spoolname), "%s-H", message_id);
4480 if (!spool_open_datafile(message_id))
4481 printf ("Failed to load message datafile %s\n", message_id);
4482 if (spool_read_header(spoolname, TRUE, FALSE) != spool_read_OK)
4483 printf ("Failed to load message %s\n", message_id);
4486 /* Read a test message from a file. We fudge it up to be on stdin, saving
4487 stdin itself for later reading of expansion strings. */
4489 else if (expansion_test_message != NULL)
4491 int save_stdin = dup(0);
4492 int fd = Uopen(expansion_test_message, O_RDONLY, 0);
4495 fprintf(stderr, "exim: failed to open %s: %s\n", expansion_test_message,
4497 return EXIT_FAILURE;
4500 filter_test = FTEST_USER; /* Fudge to make it look like filter test */
4501 message_ended = END_NOTENDED;
4502 read_message_body(receive_msg(extract_recipients));
4503 message_linecount += body_linecount;
4504 (void)dup2(save_stdin, 0);
4505 (void)close(save_stdin);
4506 clearerr(stdin); /* Required by Darwin */
4509 /* Allow $recipients for this testing */
4511 enable_dollar_recipients = TRUE;
4513 /* Expand command line items */
4515 if (recipients_arg < argc)
4517 while (recipients_arg < argc)
4519 uschar *s = argv[recipients_arg++];
4520 uschar *ss = expand_string(s);
4521 if (ss == NULL) printf ("Failed: %s\n", expand_string_message);
4522 else printf("%s\n", CS ss);
4530 char *(*fn_readline)(char *) = NULL;
4531 char *(*fn_addhist)(char *) = NULL;
4534 void *dlhandle = set_readline(&fn_readline, &fn_addhist);
4540 uschar *source = get_stdinput(fn_readline, fn_addhist);
4541 if (source == NULL) break;
4542 ss = expand_string(source);
4544 printf ("Failed: %s\n", expand_string_message);
4545 else printf("%s\n", CS ss);
4549 if (dlhandle != NULL) dlclose(dlhandle);
4553 /* The data file will be open after -Mset */
4555 if (deliver_datafile >= 0)
4557 (void)close(deliver_datafile);
4558 deliver_datafile = -1;
4561 exim_exit(EXIT_SUCCESS);
4565 /* The active host name is normally the primary host name, but it can be varied
4566 for hosts that want to play several parts at once. We need to ensure that it is
4567 set for host checking, and for receiving messages. */
4569 smtp_active_hostname = primary_hostname;
4570 if (raw_active_hostname != NULL)
4572 uschar *nah = expand_string(raw_active_hostname);
4575 if (!expand_string_forcedfail)
4576 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to expand \"%s\" "
4577 "(smtp_active_hostname): %s", raw_active_hostname,
4578 expand_string_message);
4580 else if (nah[0] != 0) smtp_active_hostname = nah;
4583 /* Handle host checking: this facility mocks up an incoming SMTP call from a
4584 given IP address so that the blocking and relay configuration can be tested.
4585 Unless a sender_ident was set by -oMt, we discard it (the default is the
4586 caller's login name). An RFC 1413 call is made only if we are running in the
4587 test harness and an incoming interface and both ports are specified, because
4588 there is no TCP/IP call to find the ident for. */
4595 if (!sender_ident_set)
4597 sender_ident = NULL;
4598 if (running_in_test_harness && sender_host_port != 0 &&
4599 interface_address != NULL && interface_port != 0)
4600 verify_get_ident(1413);
4603 /* In case the given address is a non-canonical IPv6 address, canonicize
4604 it. The code works for both IPv4 and IPv6, as it happens. */
4606 size = host_aton(sender_host_address, x);
4607 sender_host_address = store_get(48); /* large enough for full IPv6 */
4608 (void)host_nmtoa(size, x, -1, sender_host_address, ':');
4610 /* Now set up for testing */
4612 host_build_sender_fullhost();
4616 sender_local = FALSE;
4617 sender_host_notsocket = TRUE;
4618 debug_file = stderr;
4619 debug_fd = fileno(debug_file);
4620 fprintf(stdout, "\n**** SMTP testing session as if from host %s\n"
4621 "**** but without any ident (RFC 1413) callback.\n"
4622 "**** This is not for real!\n\n",
4623 sender_host_address);
4625 if (verify_check_host(&hosts_connection_nolog) == OK)
4626 log_write_selector &= ~L_smtp_connection;
4627 log_write(L_smtp_connection, LOG_MAIN, "%s", smtp_get_connection_info());
4629 /* NOTE: We do *not* call smtp_log_no_mail() if smtp_start_session() fails,
4630 because a log line has already been written for all its failure exists
4631 (usually "connection refused: <reason>") and writing another one is
4632 unnecessary clutter. */
4634 if (smtp_start_session())
4636 reset_point = store_get(0);
4639 store_reset(reset_point);
4640 if (smtp_setup_msg() <= 0) break;
4641 if (!receive_msg(FALSE)) break;
4645 exim_exit(EXIT_SUCCESS);
4649 /* Arrange for message reception if recipients or SMTP were specified;
4650 otherwise complain unless a version print (-bV) happened or this is a filter
4651 verification test. In the former case, show the configuration file name. */
4653 if (recipients_arg >= argc && !extract_recipients && !smtp_input)
4655 if (version_printed)
4657 printf("Configuration file is %s\n", config_main_filename);
4658 return EXIT_SUCCESS;
4661 if (filter_test == FTEST_NONE)
4662 exim_usage(called_as);
4666 /* If mua_wrapper is set, Exim is being used to turn an MUA that submits on the
4667 standard input into an MUA that submits to a smarthost over TCP/IP. We know
4668 that we are not called from inetd, because that is rejected above. The
4669 following configuration settings are forced here:
4671 (1) Synchronous delivery (-odi)
4672 (2) Errors to stderr (-oep == -oeq)
4673 (3) No parallel remote delivery
4674 (4) Unprivileged delivery
4676 We don't force overall queueing options because there are several of them;
4677 instead, queueing is avoided below when mua_wrapper is set. However, we do need
4678 to override any SMTP queueing. */
4682 synchronous_delivery = TRUE;
4683 arg_error_handling = ERRORS_STDERR;
4684 remote_max_parallel = 1;
4685 deliver_drop_privilege = TRUE;
4687 queue_smtp_domains = NULL;
4691 /* Prepare to accept one or more new messages on the standard input. When a
4692 message has been read, its id is returned in message_id[]. If doing immediate
4693 delivery, we fork a delivery process for each received message, except for the
4694 last one, where we can save a process switch.
4696 It is only in non-smtp mode that error_handling is allowed to be changed from
4697 its default of ERRORS_SENDER by argument. (Idle thought: are any of the
4698 sendmail error modes other than -oem ever actually used? Later: yes.) */
4700 if (!smtp_input) error_handling = arg_error_handling;
4702 /* If this is an inetd call, ensure that stderr is closed to prevent panic
4703 logging being sent down the socket and make an identd call to get the
4708 (void)fclose(stderr);
4709 exim_nullstd(); /* Re-open to /dev/null */
4710 verify_get_ident(IDENT_PORT);
4711 host_build_sender_fullhost();
4712 set_process_info("handling incoming connection from %s via inetd",
4716 /* If the sender host address has been set, build sender_fullhost if it hasn't
4717 already been done (which it will have been for inetd). This caters for the
4718 case when it is forced by -oMa. However, we must flag that it isn't a socket,
4719 so that the test for IP options is skipped for -bs input. */
4721 if (sender_host_address != NULL && sender_fullhost == NULL)
4723 host_build_sender_fullhost();
4724 set_process_info("handling incoming connection from %s via -oMa",
4726 sender_host_notsocket = TRUE;
4729 /* Otherwise, set the sender host as unknown except for inetd calls. This
4730 prevents host checking in the case of -bs not from inetd and also for -bS. */
4732 else if (!is_inetd) sender_host_unknown = TRUE;
4734 /* If stdout does not exist, then dup stdin to stdout. This can happen
4735 if exim is started from inetd. In this case fd 0 will be set to the socket,
4736 but fd 1 will not be set. This also happens for passed SMTP channels. */
4738 if (fstat(1, &statbuf) < 0) (void)dup2(0, 1);
4740 /* Set up the incoming protocol name and the state of the program. Root is
4741 allowed to force received protocol via the -oMr option above. If we have come
4742 via inetd, the process info has already been set up. We don't set
4743 received_protocol here for smtp input, as it varies according to
4744 batch/HELO/EHLO/AUTH/TLS. */
4748 if (!is_inetd) set_process_info("accepting a local %sSMTP message from <%s>",
4749 smtp_batched_input? "batched " : "",
4750 (sender_address!= NULL)? sender_address : originator_login);
4754 if (received_protocol == NULL)
4755 received_protocol = string_sprintf("local%s", called_as);
4756 set_process_info("accepting a local non-SMTP message from <%s>",
4760 /* Initialize the session_local_queue-only flag (this will be ignored if
4761 mua_wrapper is set) */
4764 session_local_queue_only = queue_only;
4766 /* For non-SMTP and for batched SMTP input, check that there is enough space on
4767 the spool if so configured. On failure, we must not attempt to send an error
4768 message! (For interactive SMTP, the check happens at MAIL FROM and an SMTP
4769 error code is given.) */
4771 if ((!smtp_input || smtp_batched_input) && !receive_check_fs(0))
4773 fprintf(stderr, "exim: insufficient disk space\n");
4774 return EXIT_FAILURE;
4777 /* If this is smtp input of any kind, real or batched, handle the start of the
4780 NOTE: We do *not* call smtp_log_no_mail() if smtp_start_session() fails,
4781 because a log line has already been written for all its failure exists
4782 (usually "connection refused: <reason>") and writing another one is
4783 unnecessary clutter. */
4789 if (verify_check_host(&hosts_connection_nolog) == OK)
4790 log_write_selector &= ~L_smtp_connection;
4791 log_write(L_smtp_connection, LOG_MAIN, "%s", smtp_get_connection_info());
4792 if (!smtp_start_session())
4795 exim_exit(EXIT_SUCCESS);
4799 /* Otherwise, set up the input size limit here. */
4803 thismessage_size_limit = expand_string_integer(message_size_limit, TRUE);
4804 if (expand_string_message != NULL)
4806 if (thismessage_size_limit == -1)
4807 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to expand "
4808 "message_size_limit: %s", expand_string_message);
4810 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "invalid value for "
4811 "message_size_limit: %s", expand_string_message);
4815 /* Loop for several messages when reading SMTP input. If we fork any child
4816 processes, we don't want to wait for them unless synchronous delivery is
4817 requested, so set SIGCHLD to SIG_IGN in that case. This is not necessarily the
4818 same as SIG_DFL, despite the fact that documentation often lists the default as
4819 "ignore". This is a confusing area. This is what I know:
4821 At least on some systems (e.g. Solaris), just setting SIG_IGN causes child
4822 processes that complete simply to go away without ever becoming defunct. You
4823 can't then wait for them - but we don't want to wait for them in the
4824 non-synchronous delivery case. However, this behaviour of SIG_IGN doesn't
4825 happen for all OS (e.g. *BSD is different).
4827 But that's not the end of the story. Some (many? all?) systems have the
4828 SA_NOCLDWAIT option for sigaction(). This requests the behaviour that Solaris
4829 has by default, so it seems that the difference is merely one of default
4830 (compare restarting vs non-restarting signals).
4832 To cover all cases, Exim sets SIG_IGN with SA_NOCLDWAIT here if it can. If not,
4833 it just sets SIG_IGN. To be on the safe side it also calls waitpid() at the end
4834 of the loop below. Paranoia rules.
4836 February 2003: That's *still* not the end of the story. There are now versions
4837 of Linux (where SIG_IGN does work) that are picky. If, having set SIG_IGN, a
4838 process then calls waitpid(), a grumble is written to the system log, because
4839 this is logically inconsistent. In other words, it doesn't like the paranoia.
4840 As a consequenc of this, the waitpid() below is now excluded if we are sure
4841 that SIG_IGN works. */
4843 if (!synchronous_delivery)
4846 struct sigaction act;
4847 act.sa_handler = SIG_IGN;
4848 sigemptyset(&(act.sa_mask));
4849 act.sa_flags = SA_NOCLDWAIT;
4850 sigaction(SIGCHLD, &act, NULL);
4852 signal(SIGCHLD, SIG_IGN);
4856 /* Save the current store pool point, for resetting at the start of
4857 each message, and save the real sender address, if any. */
4859 reset_point = store_get(0);
4860 real_sender_address = sender_address;
4862 /* Loop to receive messages; receive_msg() returns TRUE if there are more
4863 messages to be read (SMTP input), or FALSE otherwise (not SMTP, or SMTP channel
4868 store_reset(reset_point);
4871 /* Handle the SMTP case; call smtp_setup_mst() to deal with the initial SMTP
4872 input and build the recipients list, before calling receive_msg() to read the
4873 message proper. Whatever sender address is given in the SMTP transaction is
4874 often ignored for local senders - we use the actual sender, which is normally
4875 either the underlying user running this process or a -f argument provided by
4876 a trusted caller. It is saved in real_sender_address. The test for whether to
4877 accept the SMTP sender is encapsulated in receive_check_set_sender(). */
4882 if ((rc = smtp_setup_msg()) > 0)
4884 if (real_sender_address != NULL &&
4885 !receive_check_set_sender(sender_address))
4887 sender_address = raw_sender = real_sender_address;
4888 sender_address_unrewritten = NULL;
4891 /* For batched SMTP, we have to run the acl_not_smtp_start ACL, since it
4892 isn't really SMTP, so no other ACL will run until the acl_not_smtp one at
4893 the very end. The result of the ACL is ignored (as for other non-SMTP
4894 messages). It is run for its potential side effects. */
4896 if (smtp_batched_input && acl_not_smtp_start != NULL)
4898 uschar *user_msg, *log_msg;
4899 enable_dollar_recipients = TRUE;
4900 (void)acl_check(ACL_WHERE_NOTSMTP_START, NULL, acl_not_smtp_start,
4901 &user_msg, &log_msg);
4902 enable_dollar_recipients = FALSE;
4905 /* Now get the data for the message */
4907 more = receive_msg(extract_recipients);
4908 if (message_id[0] == 0)
4911 smtp_log_no_mail(); /* Log no mail if configured */
4912 exim_exit(EXIT_FAILURE);
4917 smtp_log_no_mail(); /* Log no mail if configured */
4918 exim_exit((rc == 0)? EXIT_SUCCESS : EXIT_FAILURE);
4922 /* In the non-SMTP case, we have all the information from the command
4923 line, but must process it in case it is in the more general RFC822
4924 format, and in any case, to detect syntax errors. Also, it appears that
4925 the use of comma-separated lists as single arguments is common, so we
4926 had better support them. */
4932 int count = argc - recipients_arg;
4933 uschar **list = argv + recipients_arg;
4935 /* These options cannot be changed dynamically for non-SMTP messages */
4937 active_local_sender_retain = local_sender_retain;
4938 active_local_from_check = local_from_check;
4940 /* Save before any rewriting */
4942 raw_sender = string_copy(sender_address);
4944 /* Loop for each argument */
4946 for (i = 0; i < count; i++)
4948 int start, end, domain;
4950 uschar *s = list[i];
4952 /* Loop for each comma-separated address */
4956 BOOL finished = FALSE;
4958 uschar *ss = parse_find_address_end(s, FALSE);
4960 if (*ss == ',') *ss = 0; else finished = TRUE;
4962 /* Check max recipients - if -t was used, these aren't recipients */
4964 if (recipients_max > 0 && ++rcount > recipients_max &&
4965 !extract_recipients)
4967 if (error_handling == ERRORS_STDERR)
4969 fprintf(stderr, "exim: too many recipients\n");
4970 exim_exit(EXIT_FAILURE);
4975 moan_to_sender(ERRMESS_TOOMANYRECIP, NULL, NULL, stdin, TRUE)?
4976 errors_sender_rc : EXIT_FAILURE;
4981 parse_extract_address(s, &errmess, &start, &end, &domain, FALSE);
4983 if (domain == 0 && !allow_unqualified_recipient)
4986 errmess = US"unqualified recipient address not allowed";
4989 if (recipient == NULL)
4991 if (error_handling == ERRORS_STDERR)
4993 fprintf(stderr, "exim: bad recipient address \"%s\": %s\n",
4994 string_printing(list[i]), errmess);
4995 exim_exit(EXIT_FAILURE);
5001 eblock.text1 = string_printing(list[i]);
5002 eblock.text2 = errmess;
5004 moan_to_sender(ERRMESS_BADARGADDRESS, &eblock, NULL, stdin, TRUE)?
5005 errors_sender_rc : EXIT_FAILURE;
5009 receive_add_recipient(recipient, -1);
5012 while (*(++s) != 0 && (*s == ',' || isspace(*s)));
5016 /* Show the recipients when debugging */
5021 if (sender_address != NULL) debug_printf("Sender: %s\n", sender_address);
5022 if (recipients_list != NULL)
5024 debug_printf("Recipients:\n");
5025 for (i = 0; i < recipients_count; i++)
5026 debug_printf(" %s\n", recipients_list[i].address);
5030 /* Run the acl_not_smtp_start ACL if required. The result of the ACL is
5031 ignored; rejecting here would just add complication, and it can just as
5032 well be done later. Allow $recipients to be visible in the ACL. */
5034 if (acl_not_smtp_start != NULL)
5036 uschar *user_msg, *log_msg;
5037 enable_dollar_recipients = TRUE;
5038 (void)acl_check(ACL_WHERE_NOTSMTP_START, NULL, acl_not_smtp_start,
5039 &user_msg, &log_msg);
5040 enable_dollar_recipients = FALSE;
5043 /* Read the data for the message. If filter_test is not FTEST_NONE, this
5044 will just read the headers for the message, and not write anything onto the
5047 message_ended = END_NOTENDED;
5048 more = receive_msg(extract_recipients);
5050 /* more is always FALSE here (not SMTP message) when reading a message
5051 for real; when reading the headers of a message for filter testing,
5052 it is TRUE if the headers were terminated by '.' and FALSE otherwise. */
5054 if (message_id[0] == 0) exim_exit(EXIT_FAILURE);
5055 } /* Non-SMTP message reception */
5057 /* If this is a filter testing run, there are headers in store, but
5058 no message on the spool. Run the filtering code in testing mode, setting
5059 the domain to the qualify domain and the local part to the current user,
5060 unless they have been set by options. The prefix and suffix are left unset
5061 unless specified. The the return path is set to to the sender unless it has
5062 already been set from a return-path header in the message. */
5064 if (filter_test != FTEST_NONE)
5066 deliver_domain = (ftest_domain != NULL)?
5067 ftest_domain : qualify_domain_recipient;
5068 deliver_domain_orig = deliver_domain;
5069 deliver_localpart = (ftest_localpart != NULL)?
5070 ftest_localpart : originator_login;
5071 deliver_localpart_orig = deliver_localpart;
5072 deliver_localpart_prefix = ftest_prefix;
5073 deliver_localpart_suffix = ftest_suffix;
5074 deliver_home = originator_home;
5076 if (return_path == NULL)
5078 printf("Return-path copied from sender\n");
5079 return_path = string_copy(sender_address);
5083 printf("Return-path = %s\n", (return_path[0] == 0)? US"<>" : return_path);
5085 printf("Sender = %s\n", (sender_address[0] == 0)? US"<>" : sender_address);
5087 receive_add_recipient(
5088 string_sprintf("%s%s%s@%s",
5089 (ftest_prefix == NULL)? US"" : ftest_prefix,
5091 (ftest_suffix == NULL)? US"" : ftest_suffix,
5092 deliver_domain), -1);
5094 printf("Recipient = %s\n", recipients_list[0].address);
5095 if (ftest_prefix != NULL) printf("Prefix = %s\n", ftest_prefix);
5096 if (ftest_suffix != NULL) printf("Suffix = %s\n", ftest_suffix);
5098 (void)chdir("/"); /* Get away from wherever the user is running this from */
5100 /* Now we run either a system filter test, or a user filter test, or both.
5101 In the latter case, headers added by the system filter will persist and be
5102 available to the user filter. We need to copy the filter variables
5105 if ((filter_test & FTEST_SYSTEM) != 0)
5107 if (!filter_runtest(filter_sfd, filter_test_sfile, TRUE, more))
5108 exim_exit(EXIT_FAILURE);
5111 memcpy(filter_sn, filter_n, sizeof(filter_sn));
5113 if ((filter_test & FTEST_USER) != 0)
5115 if (!filter_runtest(filter_ufd, filter_test_ufile, FALSE, more))
5116 exim_exit(EXIT_FAILURE);
5119 exim_exit(EXIT_SUCCESS);
5122 /* Else act on the result of message reception. We should not get here unless
5123 message_id[0] is non-zero. If queue_only is set, session_local_queue_only
5124 will be TRUE. If it is not, check on the number of messages received in this
5127 if (!session_local_queue_only &&
5128 smtp_accept_queue_per_connection > 0 &&
5129 receive_messagecount > smtp_accept_queue_per_connection)
5131 session_local_queue_only = TRUE;
5132 queue_only_reason = 2;
5135 /* Initialize local_queue_only from session_local_queue_only. If it is false,
5136 and queue_only_load is set, check that the load average is below it. If it is
5137 not, set local_queue_only TRUE. If queue_only_load_latch is true (the
5138 default), we put the whole session into queue_only mode. It then remains this
5139 way for any subsequent messages on the same SMTP connection. This is a
5140 deliberate choice; even though the load average may fall, it doesn't seem
5141 right to deliver later messages on the same call when not delivering earlier
5142 ones. However, there are odd cases where this is not wanted, so this can be
5143 changed by setting queue_only_load_latch false. */
5145 local_queue_only = session_local_queue_only;
5146 if (!local_queue_only && queue_only_load >= 0)
5148 local_queue_only = (load_average = OS_GETLOADAVG()) > queue_only_load;
5149 if (local_queue_only)
5151 queue_only_reason = 3;
5152 if (queue_only_load_latch) session_local_queue_only = TRUE;
5156 /* If running as an MUA wrapper, all queueing options and freezing options
5160 local_queue_only = queue_only_policy = deliver_freeze = FALSE;
5162 /* Log the queueing here, when it will get a message id attached, but
5163 not if queue_only is set (case 0). Case 1 doesn't happen here (too many
5166 if (local_queue_only) switch(queue_only_reason)
5169 log_write(L_delay_delivery,
5170 LOG_MAIN, "no immediate delivery: more than %d messages "
5171 "received in one connection", smtp_accept_queue_per_connection);
5175 log_write(L_delay_delivery,
5176 LOG_MAIN, "no immediate delivery: load average %.2f",
5177 (double)load_average/1000.0);
5181 /* Else do the delivery unless the ACL or local_scan() called for queue only
5182 or froze the message. Always deliver in a separate process. A fork failure is
5183 not a disaster, as the delivery will eventually happen on a subsequent queue
5184 run. The search cache must be tidied before the fork, as the parent will
5185 do it before exiting. The child will trigger a lookup failure and
5186 thereby defer the delivery if it tries to use (for example) a cached ldap
5187 connection that the parent has called unbind on. */
5189 else if (!queue_only_policy && !deliver_freeze)
5194 if ((pid = fork()) == 0)
5197 close_unwanted(); /* Close unwanted file descriptors and TLS */
5198 exim_nullstd(); /* Ensure std{in,out,err} exist */
5200 /* Re-exec Exim if we need to regain privilege (note: in mua_wrapper
5201 mode, deliver_drop_privilege is forced TRUE). */
5203 if (geteuid() != root_uid && !deliver_drop_privilege && !unprivileged)
5205 (void)child_exec_exim(CEE_EXEC_EXIT, FALSE, NULL, FALSE, 2, US"-Mc",
5207 /* Control does not return here. */
5210 /* No need to re-exec */
5212 rc = deliver_message(message_id, FALSE, FALSE);
5214 _exit((!mua_wrapper || rc == DELIVER_MUA_SUCCEEDED)?
5215 EXIT_SUCCESS : EXIT_FAILURE);
5220 log_write(0, LOG_MAIN|LOG_PANIC, "failed to fork automatic delivery "
5221 "process: %s", strerror(errno));
5224 /* In the parent, wait if synchronous delivery is required. This will
5225 always be the case in MUA wrapper mode. */
5227 else if (synchronous_delivery)
5230 while (wait(&status) != pid);
5231 if ((status & 0x00ff) != 0)
5232 log_write(0, LOG_MAIN|LOG_PANIC,
5233 "process %d crashed with signal %d while delivering %s",
5234 (int)pid, status & 0x00ff, message_id);
5235 if (mua_wrapper && (status & 0xffff) != 0) exim_exit(EXIT_FAILURE);
5239 /* The loop will repeat if more is TRUE. If we do not know know that the OS
5240 automatically reaps children (see comments above the loop), clear away any
5241 finished subprocesses here, in case there are lots of messages coming in
5242 from the same source. */
5244 #ifndef SIG_IGN_WORKS
5245 while (waitpid(-1, NULL, WNOHANG) > 0);
5249 exim_exit(EXIT_SUCCESS); /* Never returns */
5250 return 0; /* To stop compiler warning */