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. */
19 /*************************************************
20 * Function interface to store functions *
21 *************************************************/
23 /* We need some real functions to pass to the PCRE regular expression library
24 for store allocation via Exim's store manager. The normal calls are actually
25 macros that pass over location information to make tracing easier. These
26 functions just interface to the standard macro calls. A good compiler will
27 optimize out the tail recursion and so not make them too expensive. There
28 are two sets of functions; one for use when we want to retain the compiled
29 regular expression for a long time; the other for short-term use. */
32 function_store_get(size_t size)
34 return store_get((int)size);
38 function_dummy_free(void *block) { block = block; }
41 function_store_malloc(size_t size)
43 return store_malloc((int)size);
47 function_store_free(void *block)
55 /*************************************************
56 * Compile regular expression and panic on fail *
57 *************************************************/
59 /* This function is called when failure to compile a regular expression leads
60 to a panic exit. In other cases, pcre_compile() is called directly. In many
61 cases where this function is used, the results of the compilation are to be
62 placed in long-lived store, so we temporarily reset the store management
63 functions that PCRE uses if the use_malloc flag is set.
66 pattern the pattern to compile
67 caseless TRUE if caseless matching is required
68 use_malloc TRUE if compile into malloc store
70 Returns: pointer to the compiled pattern
74 regex_must_compile(uschar *pattern, BOOL caseless, BOOL use_malloc)
77 int options = PCRE_COPT;
82 pcre_malloc = function_store_malloc;
83 pcre_free = function_store_free;
85 if (caseless) options |= PCRE_CASELESS;
86 yield = pcre_compile(CS pattern, options, (const char **)&error, &offset, NULL);
87 pcre_malloc = function_store_get;
88 pcre_free = function_dummy_free;
90 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "regular expression error: "
91 "%s at offset %d while compiling %s", error, offset, pattern);
98 /*************************************************
99 * Execute regular expression and set strings *
100 *************************************************/
102 /* This function runs a regular expression match, and sets up the pointers to
103 the matched substrings.
106 re the compiled expression
107 subject the subject string
108 options additional PCRE options
109 setup if < 0 do full setup
110 if >= 0 setup from setup+1 onwards,
111 excluding the full matched string
113 Returns: TRUE or FALSE
117 regex_match_and_setup(const pcre *re, uschar *subject, int options, int setup)
119 int ovector[3*(EXPAND_MAXN+1)];
120 int n = pcre_exec(re, NULL, CS subject, Ustrlen(subject), 0,
121 PCRE_EOPT | options, ovector, sizeof(ovector)/sizeof(int));
123 if (n == 0) n = EXPAND_MAXN + 1;
127 expand_nmax = (setup < 0)? 0 : setup + 1;
128 for (nn = (setup < 0)? 0 : 2; nn < n*2; nn += 2)
130 expand_nstring[expand_nmax] = subject + ovector[nn];
131 expand_nlength[expand_nmax++] = ovector[nn+1] - ovector[nn];
141 /*************************************************
142 * Handler for SIGUSR1 *
143 *************************************************/
145 /* SIGUSR1 causes any exim process to write to the process log details of
146 what it is currently doing. It will only be used if the OS is capable of
147 setting up a handler that causes automatic restarting of any system call
148 that is in progress at the time.
150 Argument: the signal number (SIGUSR1)
155 usr1_handler(int sig)
157 sig = sig; /* Keep picky compilers happy */
158 log_write(0, LOG_PROCESS, "%s", process_info);
160 os_restarting_signal(SIGUSR1, usr1_handler);
165 /*************************************************
167 *************************************************/
169 /* This handler is enabled most of the time that Exim is running. The handler
170 doesn't actually get used unless alarm() has been called to set a timer, to
171 place a time limit on a system call of some kind. When the handler is run, it
174 There are some other SIGALRM handlers that are used in special cases when more
175 than just a flag setting is required; for example, when reading a message's
176 input. These are normally set up in the code module that uses them, and the
177 SIGALRM handler is reset to this one afterwards.
179 Argument: the signal value (SIGALRM)
184 sigalrm_handler(int sig)
186 sig = sig; /* Keep picky compilers happy */
188 os_non_restarting_signal(SIGALRM, sigalrm_handler);
193 /*************************************************
194 * Sleep for a fractional time interval *
195 *************************************************/
197 /* This function is called by millisleep() and exim_wait_tick() to wait for a
198 period of time that may include a fraction of a second. The coding is somewhat
199 tedious. We do not expect setitimer() ever to fail, but if it does, the process
200 will wait for ever, so we panic in this instance. (There was a case of this
201 when a bug in a function that calls milliwait() caused it to pass invalid data.
202 That's when I added the check. :-)
204 Argument: an itimerval structure containing the interval
209 milliwait(struct itimerval *itval)
212 sigset_t old_sigmask;
213 (void)sigemptyset(&sigmask); /* Empty mask */
214 (void)sigaddset(&sigmask, SIGALRM); /* Add SIGALRM */
215 (void)sigprocmask(SIG_BLOCK, &sigmask, &old_sigmask); /* Block SIGALRM */
216 if (setitimer(ITIMER_REAL, itval, NULL) < 0) /* Start timer */
217 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
218 "setitimer() failed: %s", strerror(errno));
219 (void)sigfillset(&sigmask); /* All signals */
220 (void)sigdelset(&sigmask, SIGALRM); /* Remove SIGALRM */
221 (void)sigsuspend(&sigmask); /* Until SIGALRM */
222 (void)sigprocmask(SIG_SETMASK, &old_sigmask, NULL); /* Restore mask */
228 /*************************************************
229 * Millisecond sleep function *
230 *************************************************/
232 /* The basic sleep() function has a granularity of 1 second, which is too rough
233 in some cases - for example, when using an increasing delay to slow down
236 Argument: number of millseconds
243 struct itimerval itval;
244 itval.it_interval.tv_sec = 0;
245 itval.it_interval.tv_usec = 0;
246 itval.it_value.tv_sec = msec/1000;
247 itval.it_value.tv_usec = (msec % 1000) * 1000;
253 /*************************************************
254 * Compare microsecond times *
255 *************************************************/
262 Returns: -1, 0, or +1
266 exim_tvcmp(struct timeval *t1, struct timeval *t2)
268 if (t1->tv_sec > t2->tv_sec) return +1;
269 if (t1->tv_sec < t2->tv_sec) return -1;
270 if (t1->tv_usec > t2->tv_usec) return +1;
271 if (t1->tv_usec < t2->tv_usec) return -1;
278 /*************************************************
279 * Clock tick wait function *
280 *************************************************/
282 /* Exim uses a time + a pid to generate a unique identifier in two places: its
283 message IDs, and in file names for maildir deliveries. Because some OS now
284 re-use pids within the same second, sub-second times are now being used.
285 However, for absolute certaintly, we must ensure the clock has ticked before
286 allowing the relevant process to complete. At the time of implementation of
287 this code (February 2003), the speed of processors is such that the clock will
288 invariably have ticked already by the time a process has done its job. This
289 function prepares for the time when things are faster - and it also copes with
290 clocks that go backwards.
293 then_tv A timeval which was used to create uniqueness; its usec field
294 has been rounded down to the value of the resolution.
295 We want to be sure the current time is greater than this.
296 resolution The resolution that was used to divide the microseconds
297 (1 for maildir, larger for message ids)
303 exim_wait_tick(struct timeval *then_tv, int resolution)
305 struct timeval now_tv;
306 long int now_true_usec;
308 (void)gettimeofday(&now_tv, NULL);
309 now_true_usec = now_tv.tv_usec;
310 now_tv.tv_usec = (now_true_usec/resolution) * resolution;
312 if (exim_tvcmp(&now_tv, then_tv) <= 0)
314 struct itimerval itval;
315 itval.it_interval.tv_sec = 0;
316 itval.it_interval.tv_usec = 0;
317 itval.it_value.tv_sec = then_tv->tv_sec - now_tv.tv_sec;
318 itval.it_value.tv_usec = then_tv->tv_usec + resolution - now_true_usec;
320 /* We know that, overall, "now" is less than or equal to "then". Therefore, a
321 negative value for the microseconds is possible only in the case when "now"
322 is more than a second less than "then". That means that itval.it_value.tv_sec
323 is greater than zero. The following correction is therefore safe. */
325 if (itval.it_value.tv_usec < 0)
327 itval.it_value.tv_usec += 1000000;
328 itval.it_value.tv_sec -= 1;
331 DEBUG(D_transport|D_receive)
333 if (!running_in_test_harness)
335 debug_printf("tick check: %lu.%06lu %lu.%06lu\n",
336 then_tv->tv_sec, then_tv->tv_usec, now_tv.tv_sec, now_tv.tv_usec);
337 debug_printf("waiting %lu.%06lu\n", itval.it_value.tv_sec,
338 itval.it_value.tv_usec);
349 /*************************************************
350 * Set up processing details *
351 *************************************************/
353 /* Save a text string for dumping when SIGUSR1 is received.
354 Do checks for overruns.
356 Arguments: format and arguments, as for printf()
361 set_process_info(char *format, ...)
365 sprintf(CS process_info, "%5d ", (int)getpid());
366 len = Ustrlen(process_info);
367 va_start(ap, format);
368 if (!string_vformat(process_info + len, PROCESS_INFO_SIZE - len, format, ap))
369 Ustrcpy(process_info + len, "**** string overflowed buffer ****");
370 DEBUG(D_process_info) debug_printf("set_process_info: %s\n", process_info);
378 /*************************************************
379 * Call fopen() with umask 777 and adjust mode *
380 *************************************************/
382 /* Exim runs with umask(0) so that files created with open() have the mode that
383 is specified in the open() call. However, there are some files, typically in
384 the spool directory, that are created with fopen(). They end up world-writeable
385 if no precautions are taken. Although the spool directory is not accessible to
386 the world, this is an untidiness. So this is a wrapper function for fopen()
387 that sorts out the mode of the created file.
390 filename the file name
391 options the fopen() options
392 mode the required mode
394 Returns: the fopened FILE or NULL
398 modefopen(uschar *filename, char *options, mode_t mode)
400 mode_t saved_umask = umask(0777);
401 FILE *f = Ufopen(filename, options);
402 (void)umask(saved_umask);
403 if (f != NULL) (void)fchmod(fileno(f), mode);
410 /*************************************************
411 * Ensure stdin, stdout, and stderr exist *
412 *************************************************/
414 /* Some operating systems grumble if an exec() happens without a standard
415 input, output, and error (fds 0, 1, 2) being defined. The worry is that some
416 file will be opened and will use these fd values, and then some other bit of
417 code will assume, for example, that it can write error messages to stderr.
418 This function ensures that fds 0, 1, and 2 are open if they do not already
419 exist, by connecting them to /dev/null.
421 This function is also used to ensure that std{in,out,err} exist at all times,
422 so that if any library that Exim calls tries to use them, it doesn't crash.
434 for (i = 0; i <= 2; i++)
436 if (fstat(i, &statbuf) < 0 && errno == EBADF)
438 if (devnull < 0) devnull = open("/dev/null", O_RDWR);
439 if (devnull < 0) log_write(0, LOG_MAIN|LOG_PANIC_DIE, "%s",
440 string_open_failed(errno, "/dev/null"));
441 if (devnull != i) (void)dup2(devnull, i);
444 if (devnull > 2) (void)close(devnull);
450 /*************************************************
451 * Close unwanted file descriptors for delivery *
452 *************************************************/
454 /* This function is called from a new process that has been forked to deliver
455 an incoming message, either directly, or using exec.
457 We want any smtp input streams to be closed in this new process. However, it
458 has been observed that using fclose() here causes trouble. When reading in -bS
459 input, duplicate copies of messages have been seen. The files will be sharing a
460 file pointer with the parent process, and it seems that fclose() (at least on
461 some systems - I saw this on Solaris 2.5.1) messes with that file pointer, at
462 least sometimes. Hence we go for closing the underlying file descriptors.
464 If TLS is active, we want to shut down the TLS library, but without molesting
465 the parent's SSL connection.
467 For delivery of a non-SMTP message, we want to close stdin and stdout (and
468 stderr unless debugging) because the calling process might have set them up as
469 pipes and be waiting for them to close before it waits for the submission
470 process to terminate. If they aren't closed, they hold up the calling process
471 until the initial delivery process finishes, which is not what we want.
473 Exception: We do want it for synchronous delivery!
475 And notwithstanding all the above, if D_resolver is set, implying resolver
476 debugging, leave stdout open, because that's where the resolver writes its
479 When we close stderr (which implies we've also closed stdout), we also get rid
480 of any controlling terminal.
492 tls_close(FALSE); /* Shut down the TLS library */
494 (void)close(fileno(smtp_in));
495 (void)close(fileno(smtp_out));
500 (void)close(0); /* stdin */
501 if ((debug_selector & D_resolver) == 0) (void)close(1); /* stdout */
502 if (debug_selector == 0) /* stderr */
504 if (!synchronous_delivery)
517 /*************************************************
519 *************************************************/
521 /* This function sets a new uid and gid permanently, optionally calling
522 initgroups() to set auxiliary groups. There are some special cases when running
523 Exim in unprivileged modes. In these situations the effective uid will not be
524 root; if we already have the right effective uid/gid, and don't need to
525 initialize any groups, leave things as they are.
530 igflag TRUE if initgroups() wanted
531 msg text to use in debugging output and failure log
533 Returns: nothing; bombs out on failure
537 exim_setugid(uid_t uid, gid_t gid, BOOL igflag, uschar *msg)
539 uid_t euid = geteuid();
540 gid_t egid = getegid();
542 if (euid == root_uid || euid != uid || egid != gid || igflag)
544 /* At least one OS returns +1 for initgroups failure, so just check for
549 struct passwd *pw = getpwuid(uid);
552 if (initgroups(pw->pw_name, gid) != 0)
553 log_write(0,LOG_MAIN|LOG_PANIC_DIE,"initgroups failed for uid=%ld: %s",
554 (long int)uid, strerror(errno));
556 else log_write(0, LOG_MAIN|LOG_PANIC_DIE, "cannot run initgroups(): "
557 "no passwd entry for uid=%ld", (long int)uid);
560 if (setgid(gid) < 0 || setuid(uid) < 0)
562 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "unable to set gid=%ld or uid=%ld "
563 "(euid=%ld): %s", (long int)gid, (long int)uid, (long int)euid, msg);
567 /* Debugging output included uid/gid and all groups */
572 gid_t group_list[NGROUPS_MAX];
573 debug_printf("changed uid/gid: %s\n uid=%ld gid=%ld pid=%ld\n", msg,
574 (long int)geteuid(), (long int)getegid(), (long int)getpid());
575 group_count = getgroups(NGROUPS_MAX, group_list);
576 debug_printf(" auxiliary group list:");
580 for (i = 0; i < group_count; i++) debug_printf(" %d", (int)group_list[i]);
582 else debug_printf(" <none>");
590 /*************************************************
592 *************************************************/
594 /* Exim exits via this function so that it always clears up any open
600 Returns: does not return
608 debug_printf(">>>>>>>>>>>>>>>> Exim pid=%d terminating with rc=%d "
609 ">>>>>>>>>>>>>>>>\n", (int)getpid(), rc);
616 /*************************************************
617 * Extract port from host address *
618 *************************************************/
620 /* Called to extract the port from the values given to -oMa and -oMi.
621 It also checks the syntax of the address, and terminates it before the
622 port data when a port is extracted.
625 address the address, with possible port on the end
627 Returns: the port, or zero if there isn't one
628 bombs out on a syntax error
632 check_port(uschar *address)
634 int port = host_address_extract_port(address);
635 if (string_is_ip_address(address, NULL) == 0)
637 fprintf(stderr, "exim abandoned: \"%s\" is not an IP address\n", address);
645 /*************************************************
646 * Test/verify an address *
647 *************************************************/
649 /* This function is called by the -bv and -bt code. It extracts a working
650 address from a full RFC 822 address. This isn't really necessary per se, but it
651 has the effect of collapsing source routes.
655 flags flag bits for verify_address()
656 exit_value to be set for failures
662 test_address(uschar *s, int flags, int *exit_value)
664 int start, end, domain;
665 uschar *parse_error = NULL;
666 uschar *address = parse_extract_address(s, &parse_error, &start, &end, &domain,
670 fprintf(stdout, "syntax error: %s\n", parse_error);
675 int rc = verify_address(deliver_make_addr(address,TRUE), stdout, flags, -1,
676 -1, -1, NULL, NULL, NULL);
677 if (rc == FAIL) *exit_value = 2;
678 else if (rc == DEFER && *exit_value == 0) *exit_value = 1;
684 /*************************************************
685 * Show supported features *
686 *************************************************/
688 /* This function is called for -bV/--version and for -d to output the optional
689 features of the current Exim binary.
691 Arguments: a FILE for printing
696 show_whats_supported(FILE *f)
698 #ifdef DB_VERSION_STRING
699 fprintf(f, "Berkeley DB: %s\n", DB_VERSION_STRING);
700 #elif defined(BTREEVERSION) && defined(HASHVERSION)
702 fprintf(f, "Probably Berkeley DB version 1.8x (native mode)\n");
704 fprintf(f, "Probably Berkeley DB version 1.8x (compatibility mode)\n");
706 #elif defined(_DBM_RDONLY) || defined(dbm_dirfno)
707 fprintf(f, "Probably ndbm\n");
708 #elif defined(USE_TDB)
709 fprintf(f, "Using tdb\n");
712 fprintf(f, "Probably GDBM (native mode)\n");
714 fprintf(f, "Probably GDBM (compatibility mode)\n");
718 fprintf(f, "Support for:");
719 #ifdef SUPPORT_CRYPTEQ
720 fprintf(f, " crypteq");
723 fprintf(f, " iconv()");
728 #ifdef HAVE_SETCLASSRESOURCES
729 fprintf(f, " use_setclassresources");
738 fprintf(f, " Expand_dlfunc");
740 #ifdef USE_TCP_WRAPPERS
741 fprintf(f, " TCPwrappers");
745 fprintf(f, " GnuTLS");
747 fprintf(f, " OpenSSL");
750 #ifdef SUPPORT_TRANSLATE_IP_ADDRESS
751 fprintf(f, " translate_ip_address");
753 #ifdef SUPPORT_MOVE_FROZEN_MESSAGES
754 fprintf(f, " move_frozen_messages");
756 #ifdef WITH_CONTENT_SCAN
757 fprintf(f, " Content_Scanning");
762 #ifdef WITH_OLD_DEMIME
763 fprintf(f, " Old_Demime");
765 #ifdef EXPERIMENTAL_SPF
766 fprintf(f, " Experimental_SPF");
768 #ifdef EXPERIMENTAL_SRS
769 fprintf(f, " Experimental_SRS");
771 #ifdef EXPERIMENTAL_BRIGHTMAIL
772 fprintf(f, " Experimental_Brightmail");
774 #ifdef EXPERIMENTAL_DCC
775 fprintf(f, " Experimental_DCC");
779 fprintf(f, "Lookups:");
780 #ifdef LOOKUP_LSEARCH
781 fprintf(f, " lsearch wildlsearch nwildlsearch iplsearch");
787 fprintf(f, " dbm dbmnz");
790 fprintf(f, " dnsdb");
792 #ifdef LOOKUP_DSEARCH
793 fprintf(f, " dsearch");
796 fprintf(f, " ibase");
799 fprintf(f, " ldap ldapdn ldapm");
802 fprintf(f, " mysql");
805 fprintf(f, " nis nis0");
807 #ifdef LOOKUP_NISPLUS
808 fprintf(f, " nisplus");
811 fprintf(f, " oracle");
814 fprintf(f, " passwd");
817 fprintf(f, " pgsql");
820 fprintf(f, " sqlite");
823 fprintf(f, " testdb");
826 fprintf(f, " whoson");
830 fprintf(f, "Authenticators:");
832 fprintf(f, " cram_md5");
834 #ifdef AUTH_CYRUS_SASL
835 fprintf(f, " cyrus_sasl");
838 fprintf(f, " dovecot");
840 #ifdef AUTH_PLAINTEXT
841 fprintf(f, " plaintext");
848 fprintf(f, "Routers:");
850 fprintf(f, " accept");
852 #ifdef ROUTER_DNSLOOKUP
853 fprintf(f, " dnslookup");
855 #ifdef ROUTER_IPLITERAL
856 fprintf(f, " ipliteral");
858 #ifdef ROUTER_IPLOOKUP
859 fprintf(f, " iplookup");
861 #ifdef ROUTER_MANUALROUTE
862 fprintf(f, " manualroute");
864 #ifdef ROUTER_QUERYPROGRAM
865 fprintf(f, " queryprogram");
867 #ifdef ROUTER_REDIRECT
868 fprintf(f, " redirect");
872 fprintf(f, "Transports:");
873 #ifdef TRANSPORT_APPENDFILE
874 fprintf(f, " appendfile");
875 #ifdef SUPPORT_MAILDIR
876 fprintf(f, "/maildir");
878 #ifdef SUPPORT_MAILSTORE
879 fprintf(f, "/mailstore");
885 #ifdef TRANSPORT_AUTOREPLY
886 fprintf(f, " autoreply");
888 #ifdef TRANSPORT_LMTP
891 #ifdef TRANSPORT_PIPE
894 #ifdef TRANSPORT_SMTP
899 if (fixed_never_users[0] > 0)
902 fprintf(f, "Fixed never_users: ");
903 for (i = 1; i <= (int)fixed_never_users[0] - 1; i++)
904 fprintf(f, "%d:", (unsigned int)fixed_never_users[i]);
905 fprintf(f, "%d\n", (unsigned int)fixed_never_users[i]);
908 fprintf(f, "Size of off_t: " SIZE_T_FMT "\n", sizeof(off_t));
910 /* This runtime check is to help diagnose library linkage mismatches which
911 result in segfaults and the like; as such, it's left until the end,
912 just in case. There will still be a "Configuration file is" line still to
915 tls_version_report(f);
922 /*************************************************
923 * Quote a local part *
924 *************************************************/
926 /* This function is used when a sender address or a From: or Sender: header
927 line is being created from the caller's login, or from an authenticated_id. It
928 applies appropriate quoting rules for a local part.
930 Argument: the local part
931 Returns: the local part, quoted if necessary
935 local_part_quote(uschar *lpart)
937 BOOL needs_quote = FALSE;
942 for (t = lpart; !needs_quote && *t != 0; t++)
944 needs_quote = !isalnum(*t) && strchr("!#$%&'*+-/=?^_`{|}~", *t) == NULL &&
945 (*t != '.' || t == lpart || t[1] == 0);
948 if (!needs_quote) return lpart;
951 yield = string_cat(NULL, &size, &ptr, US"\"", 1);
955 uschar *nq = US Ustrpbrk(lpart, "\\\"");
958 yield = string_cat(yield, &size, &ptr, lpart, Ustrlen(lpart));
961 yield = string_cat(yield, &size, &ptr, lpart, nq - lpart);
962 yield = string_cat(yield, &size, &ptr, US"\\", 1);
963 yield = string_cat(yield, &size, &ptr, nq, 1);
967 yield = string_cat(yield, &size, &ptr, US"\"", 1);
975 /*************************************************
976 * Load readline() functions *
977 *************************************************/
979 /* This function is called from testing executions that read data from stdin,
980 but only when running as the calling user. Currently, only -be does this. The
981 function loads the readline() function library and passes back the functions.
982 On some systems, it needs the curses library, so load that too, but try without
983 it if loading fails. All this functionality has to be requested at build time.
986 fn_readline_ptr pointer to where to put the readline pointer
987 fn_addhist_ptr pointer to where to put the addhistory function
989 Returns: the dlopen handle or NULL on failure
993 set_readline(char * (**fn_readline_ptr)(char *),
994 char * (**fn_addhist_ptr)(char *))
997 void *dlhandle_curses = dlopen("libcurses.so", RTLD_GLOBAL|RTLD_LAZY);
999 dlhandle = dlopen("libreadline.so", RTLD_GLOBAL|RTLD_NOW);
1000 if (dlhandle_curses != NULL) dlclose(dlhandle_curses);
1002 if (dlhandle != NULL)
1004 *fn_readline_ptr = (char *(*)(char*))dlsym(dlhandle, "readline");
1005 *fn_addhist_ptr = (char *(*)(char*))dlsym(dlhandle, "add_history");
1009 DEBUG(D_any) debug_printf("failed to load readline: %s\n", dlerror());
1018 /*************************************************
1019 * Get a line from stdin for testing things *
1020 *************************************************/
1022 /* This function is called when running tests that can take a number of lines
1023 of input (for example, -be and -bt). It handles continuations and trailing
1024 spaces. And prompting and a blank line output on eof. If readline() is in use,
1025 the arguments are non-NULL and provide the relevant functions.
1028 fn_readline readline function or NULL
1029 fn_addhist addhist function or NULL
1031 Returns: pointer to dynamic memory, or NULL at end of file
1035 get_stdinput(char *(*fn_readline)(char *), char *(*fn_addhist)(char *))
1040 uschar *yield = NULL;
1042 if (fn_readline == NULL) { printf("> "); fflush(stdout); }
1046 uschar buffer[1024];
1050 char *readline_line = NULL;
1051 if (fn_readline != NULL)
1053 if ((readline_line = fn_readline((i > 0)? "":"> ")) == NULL) break;
1054 if (*readline_line != 0 && fn_addhist != NULL) fn_addhist(readline_line);
1055 p = US readline_line;
1060 /* readline() not in use */
1063 if (Ufgets(buffer, sizeof(buffer), stdin) == NULL) break;
1067 /* Handle the line */
1069 ss = p + (int)Ustrlen(p);
1070 while (ss > p && isspace(ss[-1])) ss--;
1074 while (p < ss && isspace(*p)) p++; /* leading space after cont */
1077 yield = string_cat(yield, &size, &ptr, p, ss - p);
1080 if (fn_readline != NULL) free(readline_line);
1083 if (ss == p || yield[ptr-1] != '\\')
1091 if (yield == NULL) printf("\n");
1097 /*************************************************
1098 * Output usage information for the program *
1099 *************************************************/
1101 /* This function is called when there are no recipients
1102 or a specific --help argument was added.
1105 progname information on what name we were called by
1107 Returns: DOES NOT RETURN
1111 exim_usage(uschar *progname)
1114 /* Handle specific program invocation varients */
1115 if (Ustrcmp(progname, US"-mailq") == 0)
1118 "mailq - list the contents of the mail queue\n\n"
1119 "For a list of options, see the Exim documentation.\n");
1123 /* Generic usage - we output this whatever happens */
1125 "Exim is a Mail Transfer Agent. It is normally called by Mail User Agents,\n"
1126 "not directly from a shell command line. Options and/or arguments control\n"
1127 "what it does when called. For a list of options, see the Exim documentation.\n");
1134 /*************************************************
1135 * Validate that the macros given are okay *
1136 *************************************************/
1138 /* Typically, Exim will drop privileges if macros are supplied. In some
1139 cases, we want to not do so.
1141 Arguments: none (macros is a global)
1142 Returns: true if trusted, false otherwise
1146 macros_trusted(void)
1148 #ifdef WHITELIST_D_MACROS
1150 uschar *whitelisted, *end, *p, **whites, **w;
1151 int white_count, i, n;
1153 BOOL prev_char_item, found;
1158 #ifndef WHITELIST_D_MACROS
1162 /* We only trust -D overrides for some invoking users:
1163 root, the exim run-time user, the optional config owner user.
1164 I don't know why config-owner would be needed, but since they can own the
1165 config files anyway, there's no security risk to letting them override -D. */
1166 if ( ! ((real_uid == root_uid)
1167 || (real_uid == exim_uid)
1168 #ifdef CONFIGURE_OWNER
1169 || (real_uid == config_uid)
1173 debug_printf("macros_trusted rejecting macros for uid %d\n", (int) real_uid);
1177 /* Get a list of macros which are whitelisted */
1178 whitelisted = string_copy_malloc(US WHITELIST_D_MACROS);
1179 prev_char_item = FALSE;
1181 for (p = whitelisted; *p != '\0'; ++p)
1183 if (*p == ':' || isspace(*p))
1188 prev_char_item = FALSE;
1191 if (!prev_char_item)
1192 prev_char_item = TRUE;
1199 whites = store_malloc(sizeof(uschar *) * (white_count+1));
1200 for (p = whitelisted, i = 0; (p != end) && (i < white_count); ++p)
1205 if (i == white_count)
1207 while (*p != '\0' && p < end)
1213 /* The list of macros should be very short. Accept the N*M complexity. */
1214 for (m = macros; m != NULL; m = m->next)
1217 for (w = whites; *w; ++w)
1218 if (Ustrcmp(*w, m->name) == 0)
1225 if (m->replacement == NULL)
1227 len = Ustrlen(m->replacement);
1230 n = pcre_exec(regex_whitelisted_macro, NULL, CS m->replacement, len,
1231 0, PCRE_EOPT, NULL, 0);
1234 if (n != PCRE_ERROR_NOMATCH)
1235 debug_printf("macros_trusted checking %s returned %d\n", m->name, n);
1239 debug_printf("macros_trusted overriden to true by whitelisting\n");
1245 /*************************************************
1246 * Entry point and high-level code *
1247 *************************************************/
1249 /* Entry point for the Exim mailer. Analyse the arguments and arrange to take
1250 the appropriate action. All the necessary functions are present in the one
1251 binary. I originally thought one should split it up, but it turns out that so
1252 much of the apparatus is needed in each chunk that one might as well just have
1253 it all available all the time, which then makes the coding easier as well.
1256 argc count of entries in argv
1257 argv argument strings, with argv[0] being the program name
1259 Returns: EXIT_SUCCESS if terminated successfully
1260 EXIT_FAILURE otherwise, except when a message has been sent
1261 to the sender, and -oee was given
1265 main(int argc, char **cargv)
1267 uschar **argv = USS cargv;
1268 int arg_receive_timeout = -1;
1269 int arg_smtp_receive_timeout = -1;
1270 int arg_error_handling = error_handling;
1271 int filter_sfd = -1;
1272 int filter_ufd = -1;
1275 int list_queue_option = 0;
1277 int msg_action_arg = -1;
1278 int namelen = (argv[0] == NULL)? 0 : Ustrlen(argv[0]);
1279 int queue_only_reason = 0;
1281 int perl_start_option = 0;
1283 int recipients_arg = argc;
1284 int sender_address_domain = 0;
1285 int test_retry_arg = -1;
1286 int test_rewrite_arg = -1;
1287 BOOL arg_queue_only = FALSE;
1288 BOOL bi_option = FALSE;
1289 BOOL checking = FALSE;
1290 BOOL count_queue = FALSE;
1291 BOOL expansion_test = FALSE;
1292 BOOL extract_recipients = FALSE;
1293 BOOL forced_delivery = FALSE;
1294 BOOL f_end_dot = FALSE;
1295 BOOL deliver_give_up = FALSE;
1296 BOOL list_queue = FALSE;
1297 BOOL list_options = FALSE;
1298 BOOL local_queue_only;
1300 BOOL one_msg_action = FALSE;
1301 BOOL queue_only_set = FALSE;
1302 BOOL receiving_message = TRUE;
1303 BOOL sender_ident_set = FALSE;
1304 BOOL session_local_queue_only;
1306 BOOL removed_privilege = FALSE;
1307 BOOL usage_wanted = FALSE;
1308 BOOL verify_address_mode = FALSE;
1309 BOOL verify_as_sender = FALSE;
1310 BOOL version_printed = FALSE;
1311 uschar *alias_arg = NULL;
1312 uschar *called_as = US"";
1313 uschar *start_queue_run_id = NULL;
1314 uschar *stop_queue_run_id = NULL;
1315 uschar *expansion_test_message = NULL;
1316 uschar *ftest_domain = NULL;
1317 uschar *ftest_localpart = NULL;
1318 uschar *ftest_prefix = NULL;
1319 uschar *ftest_suffix = NULL;
1320 uschar *malware_test_file = NULL;
1321 uschar *real_sender_address;
1322 uschar *originator_home = US"/";
1326 struct stat statbuf;
1327 pid_t passed_qr_pid = (pid_t)0;
1328 int passed_qr_pipe = -1;
1329 gid_t group_list[NGROUPS_MAX];
1331 /* Possible options for -R and -S */
1333 static uschar *rsopts[] = { US"f", US"ff", US"r", US"rf", US"rff" };
1335 /* Need to define this in case we need to change the environment in order
1336 to get rid of a bogus time zone. We have to make it char rather than uschar
1337 because some OS define it in /usr/include/unistd.h. */
1339 extern char **environ;
1341 /* If the Exim user and/or group and/or the configuration file owner/group were
1342 defined by ref:name at build time, we must now find the actual uid/gid values.
1343 This is a feature to make the lives of binary distributors easier. */
1345 #ifdef EXIM_USERNAME
1346 if (route_finduser(US EXIM_USERNAME, &pw, &exim_uid))
1350 fprintf(stderr, "exim: refusing to run with uid 0 for \"%s\"\n",
1354 exim_gid = pw->pw_gid;
1358 fprintf(stderr, "exim: failed to find uid for user name \"%s\"\n",
1364 #ifdef EXIM_GROUPNAME
1365 if (!route_findgroup(US EXIM_GROUPNAME, &exim_gid))
1367 fprintf(stderr, "exim: failed to find gid for group name \"%s\"\n",
1373 #ifdef CONFIGURE_OWNERNAME
1374 if (!route_finduser(US CONFIGURE_OWNERNAME, NULL, &config_uid))
1376 fprintf(stderr, "exim: failed to find uid for user name \"%s\"\n",
1377 CONFIGURE_OWNERNAME);
1382 /* We default the system_filter_user to be the Exim run-time user, as a
1383 sane non-root value. */
1384 system_filter_uid = exim_uid;
1386 #ifdef CONFIGURE_GROUPNAME
1387 if (!route_findgroup(US CONFIGURE_GROUPNAME, &config_gid))
1389 fprintf(stderr, "exim: failed to find gid for group name \"%s\"\n",
1390 CONFIGURE_GROUPNAME);
1395 /* In the Cygwin environment, some initialization needs doing. It is fudged
1396 in by means of this macro. */
1402 /* Check a field which is patched when we are running Exim within its
1403 testing harness; do a fast initial check, and then the whole thing. */
1405 running_in_test_harness =
1406 *running_status == '<' && Ustrcmp(running_status, "<<<testing>>>") == 0;
1408 /* The C standard says that the equivalent of setlocale(LC_ALL, "C") is obeyed
1409 at the start of a program; however, it seems that some environments do not
1410 follow this. A "strange" locale can affect the formatting of timestamps, so we
1413 setlocale(LC_ALL, "C");
1415 /* Set up the default handler for timing using alarm(). */
1417 os_non_restarting_signal(SIGALRM, sigalrm_handler);
1419 /* Ensure we have a buffer for constructing log entries. Use malloc directly,
1420 because store_malloc writes a log entry on failure. */
1422 log_buffer = (uschar *)malloc(LOG_BUFFER_SIZE);
1423 if (log_buffer == NULL)
1425 fprintf(stderr, "exim: failed to get store for log buffer\n");
1429 /* Set log_stderr to stderr, provided that stderr exists. This gets reset to
1430 NULL when the daemon is run and the file is closed. We have to use this
1431 indirection, because some systems don't allow writing to the variable "stderr".
1434 if (fstat(fileno(stderr), &statbuf) >= 0) log_stderr = stderr;
1436 /* Arrange for the PCRE regex library to use our store functions. Note that
1437 the normal calls are actually macros that add additional arguments for
1438 debugging purposes so we have to assign specially constructed functions here.
1439 The default is to use store in the stacking pool, but this is overridden in the
1440 regex_must_compile() function. */
1442 pcre_malloc = function_store_get;
1443 pcre_free = function_dummy_free;
1445 /* Ensure there is a big buffer for temporary use in several places. It is put
1446 in malloc store so that it can be freed for enlargement if necessary. */
1448 big_buffer = store_malloc(big_buffer_size);
1450 /* Set up the handler for the data request signal, and set the initial
1451 descriptive text. */
1453 set_process_info("initializing");
1454 os_restarting_signal(SIGUSR1, usr1_handler);
1456 /* SIGHUP is used to get the daemon to reconfigure. It gets set as appropriate
1457 in the daemon code. For the rest of Exim's uses, we ignore it. */
1459 signal(SIGHUP, SIG_IGN);
1461 /* We don't want to die on pipe errors as the code is written to handle
1462 the write error instead. */
1464 signal(SIGPIPE, SIG_IGN);
1466 /* Under some circumstance on some OS, Exim can get called with SIGCHLD
1467 set to SIG_IGN. This causes subprocesses that complete before the parent
1468 process waits for them not to hang around, so when Exim calls wait(), nothing
1469 is there. The wait() code has been made robust against this, but let's ensure
1470 that SIGCHLD is set to SIG_DFL, because it's tidier to wait and get a process
1471 ending status. We use sigaction rather than plain signal() on those OS where
1472 SA_NOCLDWAIT exists, because we want to be sure it is turned off. (There was a
1473 problem on AIX with this.) */
1477 struct sigaction act;
1478 act.sa_handler = SIG_DFL;
1479 sigemptyset(&(act.sa_mask));
1481 sigaction(SIGCHLD, &act, NULL);
1484 signal(SIGCHLD, SIG_DFL);
1487 /* Save the arguments for use if we re-exec exim as a daemon after receiving
1492 /* Set up the version number. Set up the leading 'E' for the external form of
1493 message ids, set the pointer to the internal form, and initialize it to
1494 indicate no message being processed. */
1497 message_id_option[0] = '-';
1498 message_id_external = message_id_option + 1;
1499 message_id_external[0] = 'E';
1500 message_id = message_id_external + 1;
1503 /* Set the umask to zero so that any files Exim creates using open() are
1504 created with the modes that it specifies. NOTE: Files created with fopen() have
1505 a problem, which was not recognized till rather late (February 2006). With this
1506 umask, such files will be world writeable. (They are all content scanning files
1507 in the spool directory, which isn't world-accessible, so this is not a
1508 disaster, but it's untidy.) I don't want to change this overall setting,
1509 however, because it will interact badly with the open() calls. Instead, there's
1510 now a function called modefopen() that fiddles with the umask while calling
1515 /* Precompile the regular expression for matching a message id. Keep this in
1516 step with the code that generates ids in the accept.c module. We need to do
1517 this here, because the -M options check their arguments for syntactic validity
1518 using mac_ismsgid, which uses this. */
1521 regex_must_compile(US"^(?:[^\\W_]{6}-){2}[^\\W_]{2}$", FALSE, TRUE);
1523 /* Precompile the regular expression that is used for matching an SMTP error
1524 code, possibly extended, at the start of an error message. Note that the
1525 terminating whitespace character is included. */
1528 regex_must_compile(US"^\\d\\d\\d\\s(?:\\d\\.\\d\\d?\\d?\\.\\d\\d?\\d?\\s)?",
1531 #ifdef WHITELIST_D_MACROS
1532 /* Precompile the regular expression used to filter the content of macros
1533 given to -D for permissibility. */
1535 regex_whitelisted_macro =
1536 regex_must_compile(US"^[A-Za-z0-9_/.-]*$", FALSE, TRUE);
1540 /* If the program is called as "mailq" treat it as equivalent to "exim -bp";
1541 this seems to be a generally accepted convention, since one finds symbolic
1542 links called "mailq" in standard OS configurations. */
1544 if ((namelen == 5 && Ustrcmp(argv[0], "mailq") == 0) ||
1545 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/mailq", 6) == 0))
1548 receiving_message = FALSE;
1549 called_as = US"-mailq";
1552 /* If the program is called as "rmail" treat it as equivalent to
1553 "exim -i -oee", thus allowing UUCP messages to be input using non-SMTP mode,
1554 i.e. preventing a single dot on a line from terminating the message, and
1555 returning with zero return code, even in cases of error (provided an error
1556 message has been sent). */
1558 if ((namelen == 5 && Ustrcmp(argv[0], "rmail") == 0) ||
1559 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/rmail", 6) == 0))
1562 called_as = US"-rmail";
1563 errors_sender_rc = EXIT_SUCCESS;
1566 /* If the program is called as "rsmtp" treat it as equivalent to "exim -bS";
1567 this is a smail convention. */
1569 if ((namelen == 5 && Ustrcmp(argv[0], "rsmtp") == 0) ||
1570 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/rsmtp", 6) == 0))
1572 smtp_input = smtp_batched_input = TRUE;
1573 called_as = US"-rsmtp";
1576 /* If the program is called as "runq" treat it as equivalent to "exim -q";
1577 this is a smail convention. */
1579 if ((namelen == 4 && Ustrcmp(argv[0], "runq") == 0) ||
1580 (namelen > 4 && Ustrncmp(argv[0] + namelen - 5, "/runq", 5) == 0))
1583 receiving_message = FALSE;
1584 called_as = US"-runq";
1587 /* If the program is called as "newaliases" treat it as equivalent to
1588 "exim -bi"; this is a sendmail convention. */
1590 if ((namelen == 10 && Ustrcmp(argv[0], "newaliases") == 0) ||
1591 (namelen > 10 && Ustrncmp(argv[0] + namelen - 11, "/newaliases", 11) == 0))
1594 receiving_message = FALSE;
1595 called_as = US"-newaliases";
1598 /* Save the original effective uid for a couple of uses later. It should
1599 normally be root, but in some esoteric environments it may not be. */
1601 original_euid = geteuid();
1603 /* Get the real uid and gid. If the caller is root, force the effective uid/gid
1604 to be the same as the real ones. This makes a difference only if Exim is setuid
1605 (or setgid) to something other than root, which could be the case in some
1606 special configurations. */
1608 real_uid = getuid();
1609 real_gid = getgid();
1611 if (real_uid == root_uid)
1617 /* If neither the original real uid nor the original euid was root, Exim is
1618 running in an unprivileged state. */
1620 unprivileged = (real_uid != root_uid && original_euid != root_uid);
1622 /* Scan the program's arguments. Some can be dealt with right away; others are
1623 simply recorded for checking and handling afterwards. Do a high-level switch
1624 on the second character (the one after '-'), to save some effort. */
1626 for (i = 1; i < argc; i++)
1628 BOOL badarg = FALSE;
1629 uschar *arg = argv[i];
1633 /* An argument not starting with '-' is the start of a recipients list;
1634 break out of the options-scanning loop. */
1642 /* An option consistion of -- terminates the options */
1644 if (Ustrcmp(arg, "--") == 0)
1646 recipients_arg = i + 1;
1650 /* Handle flagged options */
1652 switchchar = arg[1];
1655 /* Make all -ex options synonymous with -oex arguments, since that
1656 is assumed by various callers. Also make -qR options synonymous with -R
1657 options, as that seems to be required as well. Allow for -qqR too, and
1658 the same for -S options. */
1660 if (Ustrncmp(arg+1, "oe", 2) == 0 ||
1661 Ustrncmp(arg+1, "qR", 2) == 0 ||
1662 Ustrncmp(arg+1, "qS", 2) == 0)
1664 switchchar = arg[2];
1667 else if (Ustrncmp(arg+1, "qqR", 3) == 0 || Ustrncmp(arg+1, "qqS", 3) == 0)
1669 switchchar = arg[3];
1671 queue_2stage = TRUE;
1674 /* Make -r synonymous with -f, since it is a documented alias */
1676 else if (arg[1] == 'r') switchchar = 'f';
1678 /* Make -ov synonymous with -v */
1680 else if (Ustrcmp(arg, "-ov") == 0)
1686 /* deal with --option_aliases */
1687 else if (switchchar == '-')
1689 if (Ustrcmp(argrest, "help") == 0)
1691 usage_wanted = TRUE;
1694 else if (Ustrcmp(argrest, "version") == 0)
1701 /* High-level switch on active initial letter */
1705 /* -Btype is a sendmail option for 7bit/8bit setting. Exim is 8-bit clean
1706 so has no need of it. */
1709 if (*argrest == 0) i++; /* Skip over the type */
1714 receiving_message = FALSE; /* Reset TRUE for -bm, -bS, -bs below */
1716 /* -bd: Run in daemon mode, awaiting SMTP connections.
1717 -bdf: Ditto, but in the foreground.
1720 if (*argrest == 'd')
1722 daemon_listen = TRUE;
1723 if (*(++argrest) == 'f') background_daemon = FALSE;
1724 else if (*argrest != 0) { badarg = TRUE; break; }
1727 /* -be: Run in expansion test mode
1728 -bem: Ditto, but read a message from a file first
1731 else if (*argrest == 'e')
1733 expansion_test = checking = TRUE;
1734 if (argrest[1] == 'm')
1736 if (++i >= argc) { badarg = TRUE; break; }
1737 expansion_test_message = argv[i];
1740 if (argrest[1] != 0) { badarg = TRUE; break; }
1743 /* -bF: Run system filter test */
1745 else if (*argrest == 'F')
1747 filter_test |= FTEST_SYSTEM;
1748 if (*(++argrest) != 0) { badarg = TRUE; break; }
1749 if (++i < argc) filter_test_sfile = argv[i]; else
1751 fprintf(stderr, "exim: file name expected after %s\n", argv[i-1]);
1756 /* -bf: Run user filter test
1757 -bfd: Set domain for filter testing
1758 -bfl: Set local part for filter testing
1759 -bfp: Set prefix for filter testing
1760 -bfs: Set suffix for filter testing
1763 else if (*argrest == 'f')
1765 if (*(++argrest) == 0)
1767 filter_test |= FTEST_USER;
1768 if (++i < argc) filter_test_ufile = argv[i]; else
1770 fprintf(stderr, "exim: file name expected after %s\n", argv[i-1]);
1778 fprintf(stderr, "exim: string expected after %s\n", arg);
1781 if (Ustrcmp(argrest, "d") == 0) ftest_domain = argv[i];
1782 else if (Ustrcmp(argrest, "l") == 0) ftest_localpart = argv[i];
1783 else if (Ustrcmp(argrest, "p") == 0) ftest_prefix = argv[i];
1784 else if (Ustrcmp(argrest, "s") == 0) ftest_suffix = argv[i];
1785 else { badarg = TRUE; break; }
1789 /* -bh: Host checking - an IP address must follow. */
1791 else if (Ustrcmp(argrest, "h") == 0 || Ustrcmp(argrest, "hc") == 0)
1793 if (++i >= argc) { badarg = TRUE; break; }
1794 sender_host_address = argv[i];
1795 host_checking = checking = log_testing_mode = TRUE;
1796 host_checking_callout = argrest[1] == 'c';
1799 /* -bi: This option is used by sendmail to initialize *the* alias file,
1800 though it has the -oA option to specify a different file. Exim has no
1801 concept of *the* alias file, but since Sun's YP make script calls
1802 sendmail this way, some support must be provided. */
1804 else if (Ustrcmp(argrest, "i") == 0) bi_option = TRUE;
1806 /* -bm: Accept and deliver message - the default option. Reinstate
1807 receiving_message, which got turned off for all -b options. */
1809 else if (Ustrcmp(argrest, "m") == 0) receiving_message = TRUE;
1811 /* -bmalware: test the filename given for malware */
1813 else if (Ustrcmp(argrest, "malware") == 0)
1815 if (++i >= argc) { badarg = TRUE; break; }
1816 malware_test_file = argv[i];
1819 /* -bnq: For locally originating messages, do not qualify unqualified
1820 addresses. In the envelope, this causes errors; in header lines they
1823 else if (Ustrcmp(argrest, "nq") == 0)
1825 allow_unqualified_sender = FALSE;
1826 allow_unqualified_recipient = FALSE;
1829 /* -bpxx: List the contents of the mail queue, in various forms. If
1830 the option is -bpc, just a queue count is needed. Otherwise, if the
1831 first letter after p is r, then order is random. */
1833 else if (*argrest == 'p')
1835 if (*(++argrest) == 'c')
1838 if (*(++argrest) != 0) badarg = TRUE;
1842 if (*argrest == 'r')
1844 list_queue_option = 8;
1847 else list_queue_option = 0;
1851 /* -bp: List the contents of the mail queue, top-level only */
1853 if (*argrest == 0) {}
1855 /* -bpu: List the contents of the mail queue, top-level undelivered */
1857 else if (Ustrcmp(argrest, "u") == 0) list_queue_option += 1;
1859 /* -bpa: List the contents of the mail queue, including all delivered */
1861 else if (Ustrcmp(argrest, "a") == 0) list_queue_option += 2;
1863 /* Unknown after -bp[r] */
1873 /* -bP: List the configuration variables given as the address list.
1874 Force -v, so configuration errors get displayed. */
1876 else if (Ustrcmp(argrest, "P") == 0)
1878 list_options = TRUE;
1879 debug_selector |= D_v;
1880 debug_file = stderr;
1883 /* -brt: Test retry configuration lookup */
1885 else if (Ustrcmp(argrest, "rt") == 0)
1887 test_retry_arg = i + 1;
1891 /* -brw: Test rewrite configuration */
1893 else if (Ustrcmp(argrest, "rw") == 0)
1895 test_rewrite_arg = i + 1;
1899 /* -bS: Read SMTP commands on standard input, but produce no replies -
1900 all errors are reported by sending messages. */
1902 else if (Ustrcmp(argrest, "S") == 0)
1903 smtp_input = smtp_batched_input = receiving_message = TRUE;
1905 /* -bs: Read SMTP commands on standard input and produce SMTP replies
1906 on standard output. */
1908 else if (Ustrcmp(argrest, "s") == 0) smtp_input = receiving_message = TRUE;
1910 /* -bt: address testing mode */
1912 else if (Ustrcmp(argrest, "t") == 0)
1913 address_test_mode = checking = log_testing_mode = TRUE;
1915 /* -bv: verify addresses */
1917 else if (Ustrcmp(argrest, "v") == 0)
1918 verify_address_mode = checking = log_testing_mode = TRUE;
1920 /* -bvs: verify sender addresses */
1922 else if (Ustrcmp(argrest, "vs") == 0)
1924 verify_address_mode = checking = log_testing_mode = TRUE;
1925 verify_as_sender = TRUE;
1928 /* -bV: Print version string and support details */
1930 else if (Ustrcmp(argrest, "V") == 0)
1932 printf("Exim version %s #%s built %s\n", version_string,
1933 version_cnumber, version_date);
1934 printf("%s\n", CS version_copyright);
1935 version_printed = TRUE;
1936 show_whats_supported(stdout);
1943 /* -C: change configuration file list; ignore if it isn't really
1944 a change! Enforce a prefix check if required. */
1949 if(++i < argc) argrest = argv[i]; else
1950 { badarg = TRUE; break; }
1952 if (Ustrcmp(config_main_filelist, argrest) != 0)
1954 #ifdef ALT_CONFIG_PREFIX
1956 int len = Ustrlen(ALT_CONFIG_PREFIX);
1957 uschar *list = argrest;
1959 while((filename = string_nextinlist(&list, &sep, big_buffer,
1960 big_buffer_size)) != NULL)
1962 if ((Ustrlen(filename) < len ||
1963 Ustrncmp(filename, ALT_CONFIG_PREFIX, len) != 0 ||
1964 Ustrstr(filename, "/../") != NULL) &&
1965 (Ustrcmp(filename, "/dev/null") != 0 || real_uid != root_uid))
1967 fprintf(stderr, "-C Permission denied\n");
1972 if (real_uid != root_uid)
1974 #ifdef TRUSTED_CONFIG_PREFIX_LIST
1976 if ((real_uid != exim_uid
1977 #ifdef CONFIGURE_OWNER
1978 && real_uid != config_uid
1980 ) || Ustrstr(argrest, "/../"))
1981 trusted_config = FALSE;
1984 FILE *trust_list = Ufopen(TRUSTED_CONFIG_PREFIX_LIST, "rb");
1987 struct stat statbuf;
1989 if (fstat(fileno(trust_list), &statbuf) != 0 ||
1990 (statbuf.st_uid != root_uid /* owner not root */
1991 #ifdef CONFIGURE_OWNER
1992 && statbuf.st_uid != config_uid /* owner not the special one */
1995 (statbuf.st_gid != root_gid /* group not root */
1996 #ifdef CONFIGURE_GROUP
1997 && statbuf.st_gid != config_gid /* group not the special one */
1999 && (statbuf.st_mode & 020) != 0 /* group writeable */
2001 (statbuf.st_mode & 2) != 0) /* world writeable */
2003 trusted_config = FALSE;
2008 /* Well, the trust list at least is up to scratch... */
2009 void *reset_point = store_get(0);
2010 uschar *trusted_prefixes[32];
2011 int nr_prefixes = 0;
2014 while (Ufgets(big_buffer, big_buffer_size, trust_list))
2016 uschar *start = big_buffer, *nl;
2017 while (*start && isspace(*start))
2021 nl = Ustrchr(start, '\n');
2024 trusted_prefixes[nr_prefixes++] = string_copy(start);
2025 if (nr_prefixes == 32)
2033 uschar *list = argrest;
2035 while (trusted_config && (filename = string_nextinlist(&list,
2036 &sep, big_buffer, big_buffer_size)) != NULL)
2038 for (i=0; i < nr_prefixes; i++)
2040 int len = Ustrlen(trusted_prefixes[i]);
2041 if (Ustrlen(filename) >= len &&
2042 Ustrncmp(filename, trusted_prefixes[i], len) == 0)
2045 if (i == nr_prefixes)
2047 trusted_config = FALSE;
2051 store_reset(reset_point);
2055 /* No valid prefixes found in trust_list file. */
2056 trusted_config = FALSE;
2062 /* Could not open trust_list file. */
2063 trusted_config = FALSE;
2067 /* Not root; don't trust config */
2068 trusted_config = FALSE;
2072 config_main_filelist = argrest;
2073 config_changed = TRUE;
2078 /* -D: set up a macro definition */
2081 #ifdef DISABLE_D_OPTION
2082 fprintf(stderr, "exim: -D is not available in this Exim binary\n");
2087 macro_item *mlast = NULL;
2090 uschar *s = argrest;
2092 while (isspace(*s)) s++;
2094 if (*s < 'A' || *s > 'Z')
2096 fprintf(stderr, "exim: macro name set by -D must start with "
2097 "an upper case letter\n");
2101 while (isalnum(*s) || *s == '_')
2103 if (ptr < sizeof(name)-1) name[ptr++] = *s;
2107 if (ptr == 0) { badarg = TRUE; break; }
2108 while (isspace(*s)) s++;
2111 if (*s++ != '=') { badarg = TRUE; break; }
2112 while (isspace(*s)) s++;
2115 for (m = macros; m != NULL; m = m->next)
2117 if (Ustrcmp(m->name, name) == 0)
2119 fprintf(stderr, "exim: duplicated -D in command line\n");
2125 m = store_get(sizeof(macro_item) + Ustrlen(name));
2127 m->command_line = TRUE;
2128 if (mlast == NULL) macros = m; else mlast->next = m;
2129 Ustrcpy(m->name, name);
2130 m->replacement = string_copy(s);
2132 if (clmacro_count >= MAX_CLMACROS)
2134 fprintf(stderr, "exim: too many -D options on command line\n");
2137 clmacros[clmacro_count++] = string_sprintf("-D%s=%s", m->name,
2143 /* -d: Set debug level (see also -v below) or set the drop_cr option.
2144 The latter is now a no-op, retained for compatibility only. If -dd is used,
2145 debugging subprocesses of the daemon is disabled. */
2148 if (Ustrcmp(argrest, "ropcr") == 0)
2150 /* drop_cr = TRUE; */
2153 /* Use an intermediate variable so that we don't set debugging while
2154 decoding the debugging bits. */
2158 unsigned int selector = D_default;
2161 if (*argrest == 'd')
2163 debug_daemon = TRUE;
2167 decode_bits(&selector, NULL, D_memory, 0, argrest, debug_options,
2168 debug_options_count, US"debug", 0);
2169 debug_selector = selector;
2174 /* -E: This is a local error message. This option is not intended for
2175 external use at all, but is not restricted to trusted callers because it
2176 does no harm (just suppresses certain error messages) and if Exim is run
2177 not setuid root it won't always be trusted when it generates error
2178 messages using this option. If there is a message id following -E, point
2179 message_reference at it, for logging. */
2182 local_error_message = TRUE;
2183 if (mac_ismsgid(argrest)) message_reference = argrest;
2187 /* -ex: The vacation program calls sendmail with the undocumented "-eq"
2188 option, so it looks as if historically the -oex options are also callable
2189 without the leading -o. So we have to accept them. Before the switch,
2190 anything starting -oe has been converted to -e. Exim does not support all
2191 of the sendmail error options. */
2194 if (Ustrcmp(argrest, "e") == 0)
2196 arg_error_handling = ERRORS_SENDER;
2197 errors_sender_rc = EXIT_SUCCESS;
2199 else if (Ustrcmp(argrest, "m") == 0) arg_error_handling = ERRORS_SENDER;
2200 else if (Ustrcmp(argrest, "p") == 0) arg_error_handling = ERRORS_STDERR;
2201 else if (Ustrcmp(argrest, "q") == 0) arg_error_handling = ERRORS_STDERR;
2202 else if (Ustrcmp(argrest, "w") == 0) arg_error_handling = ERRORS_SENDER;
2207 /* -F: Set sender's full name, used instead of the gecos entry from
2208 the password file. Since users can usually alter their gecos entries,
2209 there's no security involved in using this instead. The data can follow
2210 the -F or be in the next argument. */
2215 if(++i < argc) argrest = argv[i]; else
2216 { badarg = TRUE; break; }
2218 originator_name = argrest;
2219 sender_name_forced = TRUE;
2223 /* -f: Set sender's address - this value is only actually used if Exim is
2224 run by a trusted user, or if untrusted_set_sender is set and matches the
2225 address, except that the null address can always be set by any user. The
2226 test for this happens later, when the value given here is ignored when not
2227 permitted. For an untrusted user, the actual sender is still put in Sender:
2228 if it doesn't match the From: header (unless no_local_from_check is set).
2229 The data can follow the -f or be in the next argument. The -r switch is an
2230 obsolete form of -f but since there appear to be programs out there that
2231 use anything that sendmail has ever supported, better accept it - the
2232 synonymizing is done before the switch above.
2234 At this stage, we must allow domain literal addresses, because we don't
2235 know what the setting of allow_domain_literals is yet. Ditto for trailing
2236 dots and strip_trailing_dot. */
2244 if (i+1 < argc) argrest = argv[++i]; else
2245 { badarg = TRUE; break; }
2249 sender_address = string_sprintf(""); /* Ensure writeable memory */
2253 uschar *temp = argrest + Ustrlen(argrest) - 1;
2254 while (temp >= argrest && isspace(*temp)) temp--;
2255 if (temp >= argrest && *temp == '.') f_end_dot = TRUE;
2256 allow_domain_literals = TRUE;
2257 strip_trailing_dot = TRUE;
2258 sender_address = parse_extract_address(argrest, &errmess, &start, &end,
2259 &sender_address_domain, TRUE);
2260 allow_domain_literals = FALSE;
2261 strip_trailing_dot = FALSE;
2262 if (sender_address == NULL)
2264 fprintf(stderr, "exim: bad -f address \"%s\": %s\n", argrest, errmess);
2265 return EXIT_FAILURE;
2268 sender_address_forced = TRUE;
2272 /* This is some Sendmail thing which can be ignored */
2277 /* -h: Set the hop count for an incoming message. Exim does not currently
2278 support this; it always computes it by counting the Received: headers.
2279 To put it in will require a change to the spool header file format. */
2284 if(++i < argc) argrest = argv[i]; else
2285 { badarg = TRUE; break; }
2287 if (!isdigit(*argrest)) badarg = TRUE;
2291 /* -i: Set flag so dot doesn't end non-SMTP input (same as -oi, seems
2292 not to be documented for sendmail but mailx (at least) uses it) */
2295 if (*argrest == 0) dot_ends = FALSE; else badarg = TRUE;
2300 receiving_message = FALSE;
2302 /* -MC: continue delivery of another message via an existing open
2303 file descriptor. This option is used for an internal call by the
2304 smtp transport when there is a pending message waiting to go to an
2305 address to which it has got a connection. Five subsequent arguments are
2306 required: transport name, host name, IP address, sequence number, and
2307 message_id. Transports may decline to create new processes if the sequence
2308 number gets too big. The channel is stdin. This (-MC) must be the last
2309 argument. There's a subsequent check that the real-uid is privileged.
2311 If we are running in the test harness. delay for a bit, to let the process
2312 that set this one up complete. This makes for repeatability of the logging,
2315 if (Ustrcmp(argrest, "C") == 0)
2317 union sockaddr_46 interface_sock;
2318 EXIM_SOCKLEN_T size = sizeof(interface_sock);
2322 fprintf(stderr, "exim: too many or too few arguments after -MC\n");
2323 return EXIT_FAILURE;
2326 if (msg_action_arg >= 0)
2328 fprintf(stderr, "exim: incompatible arguments\n");
2329 return EXIT_FAILURE;
2332 continue_transport = argv[++i];
2333 continue_hostname = argv[++i];
2334 continue_host_address = argv[++i];
2335 continue_sequence = Uatoi(argv[++i]);
2336 msg_action = MSG_DELIVER;
2337 msg_action_arg = ++i;
2338 forced_delivery = TRUE;
2339 queue_run_pid = passed_qr_pid;
2340 queue_run_pipe = passed_qr_pipe;
2342 if (!mac_ismsgid(argv[i]))
2344 fprintf(stderr, "exim: malformed message id %s after -MC option\n",
2346 return EXIT_FAILURE;
2349 /* Set up $sending_ip_address and $sending_port */
2351 if (getsockname(fileno(stdin), (struct sockaddr *)(&interface_sock),
2353 sending_ip_address = host_ntoa(-1, &interface_sock, NULL,
2357 fprintf(stderr, "exim: getsockname() failed after -MC option: %s\n",
2359 return EXIT_FAILURE;
2362 if (running_in_test_harness) millisleep(500);
2366 /* -MCA: set the smtp_authenticated flag; this is useful only when it
2367 precedes -MC (see above). The flag indicates that the host to which
2368 Exim is connected has accepted an AUTH sequence. */
2370 else if (Ustrcmp(argrest, "CA") == 0)
2372 smtp_authenticated = TRUE;
2376 /* -MCP: set the smtp_use_pipelining flag; this is useful only when
2377 it preceded -MC (see above) */
2379 else if (Ustrcmp(argrest, "CP") == 0)
2381 smtp_use_pipelining = TRUE;
2385 /* -MCQ: pass on the pid of the queue-running process that started
2386 this chain of deliveries and the fd of its synchronizing pipe; this
2387 is useful only when it precedes -MC (see above) */
2389 else if (Ustrcmp(argrest, "CQ") == 0)
2391 if(++i < argc) passed_qr_pid = (pid_t)(Uatol(argv[i]));
2393 if(++i < argc) passed_qr_pipe = (int)(Uatol(argv[i]));
2398 /* -MCS: set the smtp_use_size flag; this is useful only when it
2399 precedes -MC (see above) */
2401 else if (Ustrcmp(argrest, "CS") == 0)
2403 smtp_use_size = TRUE;
2407 /* -MCT: set the tls_offered flag; this is useful only when it
2408 precedes -MC (see above). The flag indicates that the host to which
2409 Exim is connected has offered TLS support. */
2412 else if (Ustrcmp(argrest, "CT") == 0)
2419 /* -M[x]: various operations on the following list of message ids:
2420 -M deliver the messages, ignoring next retry times and thawing
2421 -Mc deliver the messages, checking next retry times, no thawing
2422 -Mf freeze the messages
2423 -Mg give up on the messages
2424 -Mt thaw the messages
2425 -Mrm remove the messages
2426 In the above cases, this must be the last option. There are also the
2427 following options which are followed by a single message id, and which
2428 act on that message. Some of them use the "recipient" addresses as well.
2429 -Mar add recipient(s)
2430 -Mmad mark all recipients delivered
2431 -Mmd mark recipients(s) delivered
2433 -Mset load a message for use with -be
2435 -Mvc show copy (of whole message, in RFC 2822 format)
2440 else if (*argrest == 0)
2442 msg_action = MSG_DELIVER;
2443 forced_delivery = deliver_force_thaw = TRUE;
2445 else if (Ustrcmp(argrest, "ar") == 0)
2447 msg_action = MSG_ADD_RECIPIENT;
2448 one_msg_action = TRUE;
2450 else if (Ustrcmp(argrest, "c") == 0) msg_action = MSG_DELIVER;
2451 else if (Ustrcmp(argrest, "es") == 0)
2453 msg_action = MSG_EDIT_SENDER;
2454 one_msg_action = TRUE;
2456 else if (Ustrcmp(argrest, "f") == 0) msg_action = MSG_FREEZE;
2457 else if (Ustrcmp(argrest, "g") == 0)
2459 msg_action = MSG_DELIVER;
2460 deliver_give_up = TRUE;
2462 else if (Ustrcmp(argrest, "mad") == 0)
2464 msg_action = MSG_MARK_ALL_DELIVERED;
2466 else if (Ustrcmp(argrest, "md") == 0)
2468 msg_action = MSG_MARK_DELIVERED;
2469 one_msg_action = TRUE;
2471 else if (Ustrcmp(argrest, "rm") == 0) msg_action = MSG_REMOVE;
2472 else if (Ustrcmp(argrest, "set") == 0)
2474 msg_action = MSG_LOAD;
2475 one_msg_action = TRUE;
2477 else if (Ustrcmp(argrest, "t") == 0) msg_action = MSG_THAW;
2478 else if (Ustrcmp(argrest, "vb") == 0)
2480 msg_action = MSG_SHOW_BODY;
2481 one_msg_action = TRUE;
2483 else if (Ustrcmp(argrest, "vc") == 0)
2485 msg_action = MSG_SHOW_COPY;
2486 one_msg_action = TRUE;
2488 else if (Ustrcmp(argrest, "vh") == 0)
2490 msg_action = MSG_SHOW_HEADER;
2491 one_msg_action = TRUE;
2493 else if (Ustrcmp(argrest, "vl") == 0)
2495 msg_action = MSG_SHOW_LOG;
2496 one_msg_action = TRUE;
2498 else { badarg = TRUE; break; }
2500 /* All the -Mxx options require at least one message id. */
2502 msg_action_arg = i + 1;
2503 if (msg_action_arg >= argc)
2505 fprintf(stderr, "exim: no message ids given after %s option\n", arg);
2506 return EXIT_FAILURE;
2509 /* Some require only message ids to follow */
2511 if (!one_msg_action)
2514 for (j = msg_action_arg; j < argc; j++) if (!mac_ismsgid(argv[j]))
2516 fprintf(stderr, "exim: malformed message id %s after %s option\n",
2518 return EXIT_FAILURE;
2520 goto END_ARG; /* Remaining args are ids */
2523 /* Others require only one message id, possibly followed by addresses,
2524 which will be handled as normal arguments. */
2528 if (!mac_ismsgid(argv[msg_action_arg]))
2530 fprintf(stderr, "exim: malformed message id %s after %s option\n",
2531 argv[msg_action_arg], arg);
2532 return EXIT_FAILURE;
2539 /* Some programs seem to call the -om option without the leading o;
2540 for sendmail it askes for "me too". Exim always does this. */
2543 if (*argrest != 0) badarg = TRUE;
2547 /* -N: don't do delivery - a debugging option that stops transports doing
2548 their thing. It implies debugging at the D_v level. */
2553 dont_deliver = TRUE;
2554 debug_selector |= D_v;
2555 debug_file = stderr;
2561 /* -n: This means "don't alias" in sendmail, apparently. Just ignore
2567 /* -O: Just ignore it. In sendmail, apparently -O option=value means set
2568 option to the specified value. This form uses long names. We need to handle
2569 -O option=value and -Ooption=value. */
2576 fprintf(stderr, "exim: string expected after -O\n");
2584 /* -oA: Set an argument for the bi command (sendmail's "alternate alias
2587 if (*argrest == 'A')
2589 alias_arg = argrest + 1;
2590 if (alias_arg[0] == 0)
2592 if (i+1 < argc) alias_arg = argv[++i]; else
2594 fprintf(stderr, "exim: string expected after -oA\n");
2600 /* -oB: Set a connection message max value for remote deliveries */
2602 else if (*argrest == 'B')
2604 uschar *p = argrest + 1;
2607 if (i+1 < argc && isdigit((argv[i+1][0]))) p = argv[++i]; else
2609 connection_max_messages = 1;
2618 fprintf(stderr, "exim: number expected after -oB\n");
2621 connection_max_messages = Uatoi(p);
2625 /* -odb: background delivery */
2627 else if (Ustrcmp(argrest, "db") == 0)
2629 synchronous_delivery = FALSE;
2630 arg_queue_only = FALSE;
2631 queue_only_set = TRUE;
2634 /* -odf: foreground delivery (smail-compatible option); same effect as
2635 -odi: interactive (synchronous) delivery (sendmail-compatible option)
2638 else if (Ustrcmp(argrest, "df") == 0 || Ustrcmp(argrest, "di") == 0)
2640 synchronous_delivery = TRUE;
2641 arg_queue_only = FALSE;
2642 queue_only_set = TRUE;
2645 /* -odq: queue only */
2647 else if (Ustrcmp(argrest, "dq") == 0)
2649 synchronous_delivery = FALSE;
2650 arg_queue_only = TRUE;
2651 queue_only_set = TRUE;
2654 /* -odqs: queue SMTP only - do local deliveries and remote routing,
2655 but no remote delivery */
2657 else if (Ustrcmp(argrest, "dqs") == 0)
2660 arg_queue_only = FALSE;
2661 queue_only_set = TRUE;
2664 /* -oex: Sendmail error flags. As these are also accepted without the
2665 leading -o prefix, for compatibility with vacation and other callers,
2666 they are handled with -e above. */
2668 /* -oi: Set flag so dot doesn't end non-SMTP input (same as -i)
2669 -oitrue: Another sendmail syntax for the same */
2671 else if (Ustrcmp(argrest, "i") == 0 ||
2672 Ustrcmp(argrest, "itrue") == 0)
2675 /* -oM*: Set various characteristics for an incoming message; actually
2676 acted on for trusted callers only. */
2678 else if (*argrest == 'M')
2682 fprintf(stderr, "exim: data expected after -o%s\n", argrest);
2686 /* -oMa: Set sender host address */
2688 if (Ustrcmp(argrest, "Ma") == 0) sender_host_address = argv[++i];
2690 /* -oMaa: Set authenticator name */
2692 else if (Ustrcmp(argrest, "Maa") == 0)
2693 sender_host_authenticated = argv[++i];
2695 /* -oMas: setting authenticated sender */
2697 else if (Ustrcmp(argrest, "Mas") == 0) authenticated_sender = argv[++i];
2699 /* -oMai: setting authenticated id */
2701 else if (Ustrcmp(argrest, "Mai") == 0) authenticated_id = argv[++i];
2703 /* -oMi: Set incoming interface address */
2705 else if (Ustrcmp(argrest, "Mi") == 0) interface_address = argv[++i];
2707 /* -oMr: Received protocol */
2709 else if (Ustrcmp(argrest, "Mr") == 0) received_protocol = argv[++i];
2711 /* -oMs: Set sender host name */
2713 else if (Ustrcmp(argrest, "Ms") == 0) sender_host_name = argv[++i];
2715 /* -oMt: Set sender ident */
2717 else if (Ustrcmp(argrest, "Mt") == 0)
2719 sender_ident_set = TRUE;
2720 sender_ident = argv[++i];
2723 /* Else a bad argument */
2732 /* -om: Me-too flag for aliases. Exim always does this. Some programs
2733 seem to call this as -m (undocumented), so that is also accepted (see
2736 else if (Ustrcmp(argrest, "m") == 0) {}
2738 /* -oo: An ancient flag for old-style addresses which still seems to
2739 crop up in some calls (see in SCO). */
2741 else if (Ustrcmp(argrest, "o") == 0) {}
2743 /* -oP <name>: set pid file path for daemon */
2745 else if (Ustrcmp(argrest, "P") == 0)
2746 override_pid_file_path = argv[++i];
2748 /* -or <n>: set timeout for non-SMTP acceptance
2749 -os <n>: set timeout for SMTP acceptance */
2751 else if (*argrest == 'r' || *argrest == 's')
2753 int *tp = (*argrest == 'r')?
2754 &arg_receive_timeout : &arg_smtp_receive_timeout;
2755 if (argrest[1] == 0)
2757 if (i+1 < argc) *tp= readconf_readtime(argv[++i], 0, FALSE);
2759 else *tp = readconf_readtime(argrest + 1, 0, FALSE);
2762 fprintf(stderr, "exim: bad time value %s: abandoned\n", argv[i]);
2767 /* -oX <list>: Override local_interfaces and/or default daemon ports */
2769 else if (Ustrcmp(argrest, "X") == 0)
2770 override_local_interfaces = argv[++i];
2772 /* Unknown -o argument */
2778 /* -ps: force Perl startup; -pd force delayed Perl startup */
2782 if (*argrest == 's' && argrest[1] == 0)
2784 perl_start_option = 1;
2787 if (*argrest == 'd' && argrest[1] == 0)
2789 perl_start_option = -1;
2794 /* -panythingelse is taken as the Sendmail-compatible argument -prval:sval,
2795 which sets the host protocol and host name */
2799 if (i+1 < argc) argrest = argv[++i]; else
2800 { badarg = TRUE; break; }
2805 uschar *hn = Ustrchr(argrest, ':');
2808 received_protocol = argrest;
2812 received_protocol = string_copyn(argrest, hn - argrest);
2813 sender_host_name = hn + 1;
2820 receiving_message = FALSE;
2821 if (queue_interval >= 0)
2823 fprintf(stderr, "exim: -q specified more than once\n");
2827 /* -qq...: Do queue runs in a 2-stage manner */
2829 if (*argrest == 'q')
2831 queue_2stage = TRUE;
2835 /* -qi...: Do only first (initial) deliveries */
2837 if (*argrest == 'i')
2839 queue_run_first_delivery = TRUE;
2843 /* -qf...: Run the queue, forcing deliveries
2844 -qff..: Ditto, forcing thawing as well */
2846 if (*argrest == 'f')
2848 queue_run_force = TRUE;
2849 if (*(++argrest) == 'f')
2851 deliver_force_thaw = TRUE;
2856 /* -q[f][f]l...: Run the queue only on local deliveries */
2858 if (*argrest == 'l')
2860 queue_run_local = TRUE;
2864 /* -q[f][f][l]: Run the queue, optionally forced, optionally local only,
2865 optionally starting from a given message id. */
2867 if (*argrest == 0 &&
2868 (i + 1 >= argc || argv[i+1][0] == '-' || mac_ismsgid(argv[i+1])))
2871 if (i+1 < argc && mac_ismsgid(argv[i+1]))
2872 start_queue_run_id = argv[++i];
2873 if (i+1 < argc && mac_ismsgid(argv[i+1]))
2874 stop_queue_run_id = argv[++i];
2877 /* -q[f][f][l]<n>: Run the queue at regular intervals, optionally forced,
2878 optionally local only. */
2883 queue_interval = readconf_readtime(argrest, 0, FALSE);
2885 queue_interval = readconf_readtime(argv[++i], 0, FALSE);
2886 if (queue_interval <= 0)
2888 fprintf(stderr, "exim: bad time value %s: abandoned\n", argv[i]);
2895 case 'R': /* Synonymous with -qR... */
2896 receiving_message = FALSE;
2898 /* -Rf: As -R (below) but force all deliveries,
2899 -Rff: Ditto, but also thaw all frozen messages,
2900 -Rr: String is regex
2901 -Rrf: Regex and force
2902 -Rrff: Regex and force and thaw
2904 in all cases provided there are no further characters in this
2910 for (i = 0; i < sizeof(rsopts)/sizeof(uschar *); i++)
2912 if (Ustrcmp(argrest, rsopts[i]) == 0)
2914 if (i != 2) queue_run_force = TRUE;
2915 if (i >= 2) deliver_selectstring_regex = TRUE;
2916 if (i == 1 || i == 4) deliver_force_thaw = TRUE;
2917 argrest += Ustrlen(rsopts[i]);
2922 /* -R: Set string to match in addresses for forced queue run to
2923 pick out particular messages. */
2927 if (i+1 < argc) deliver_selectstring = argv[++i]; else
2929 fprintf(stderr, "exim: string expected after -R\n");
2933 else deliver_selectstring = argrest;
2937 /* -r: an obsolete synonym for -f (see above) */
2940 /* -S: Like -R but works on sender. */
2942 case 'S': /* Synonymous with -qS... */
2943 receiving_message = FALSE;
2945 /* -Sf: As -S (below) but force all deliveries,
2946 -Sff: Ditto, but also thaw all frozen messages,
2947 -Sr: String is regex
2948 -Srf: Regex and force
2949 -Srff: Regex and force and thaw
2951 in all cases provided there are no further characters in this
2957 for (i = 0; i < sizeof(rsopts)/sizeof(uschar *); i++)
2959 if (Ustrcmp(argrest, rsopts[i]) == 0)
2961 if (i != 2) queue_run_force = TRUE;
2962 if (i >= 2) deliver_selectstring_sender_regex = TRUE;
2963 if (i == 1 || i == 4) deliver_force_thaw = TRUE;
2964 argrest += Ustrlen(rsopts[i]);
2969 /* -S: Set string to match in addresses for forced queue run to
2970 pick out particular messages. */
2974 if (i+1 < argc) deliver_selectstring_sender = argv[++i]; else
2976 fprintf(stderr, "exim: string expected after -S\n");
2980 else deliver_selectstring_sender = argrest;
2983 /* -Tqt is an option that is exclusively for use by the testing suite.
2984 It is not recognized in other circumstances. It allows for the setting up
2985 of explicit "queue times" so that various warning/retry things can be
2986 tested. Otherwise variability of clock ticks etc. cause problems. */
2989 if (running_in_test_harness && Ustrcmp(argrest, "qt") == 0)
2990 fudged_queue_times = argv[++i];
2995 /* -t: Set flag to extract recipients from body of message. */
2998 if (*argrest == 0) extract_recipients = TRUE;
3000 /* -ti: Set flag to extract recipients from body of message, and also
3001 specify that dot does not end the message. */
3003 else if (Ustrcmp(argrest, "i") == 0)
3005 extract_recipients = TRUE;
3009 /* -tls-on-connect: don't wait for STARTTLS (for old clients) */
3012 else if (Ustrcmp(argrest, "ls-on-connect") == 0) tls_on_connect = TRUE;
3019 /* -U: This means "initial user submission" in sendmail, apparently. The
3020 doc claims that in future sendmail may refuse syntactically invalid
3021 messages instead of fixing them. For the moment, we just ignore it. */
3027 /* -v: verify things - this is a very low-level debugging */
3032 debug_selector |= D_v;
3033 debug_file = stderr;
3039 /* -x: AIX uses this to indicate some fancy 8-bit character stuff:
3041 The -x flag tells the sendmail command that mail from a local
3042 mail program has National Language Support (NLS) extended characters
3043 in the body of the mail item. The sendmail command can send mail with
3044 extended NLS characters across networks that normally corrupts these
3047 As Exim is 8-bit clean, it just ignores this flag. */
3050 if (*argrest != 0) badarg = TRUE;
3053 /* All other initial characters are errors */
3058 } /* End of high-level switch statement */
3060 /* Failed to recognize the option, or syntax error */
3064 fprintf(stderr, "exim abandoned: unknown, malformed, or incomplete "
3065 "option %s\n", arg);
3071 /* If -R or -S have been specified without -q, assume a single queue run. */
3073 if ((deliver_selectstring != NULL || deliver_selectstring_sender != NULL) &&
3074 queue_interval < 0) queue_interval = 0;
3078 /* If usage_wanted is set we call the usage function - which never returns */
3079 if (usage_wanted) exim_usage(called_as);
3081 /* Arguments have been processed. Check for incompatibilities. */
3083 (smtp_input || extract_recipients || recipients_arg < argc) &&
3084 (daemon_listen || queue_interval >= 0 || bi_option ||
3085 test_retry_arg >= 0 || test_rewrite_arg >= 0 ||
3086 filter_test != FTEST_NONE || (msg_action_arg > 0 && !one_msg_action))
3089 msg_action_arg > 0 &&
3090 (daemon_listen || queue_interval >= 0 || list_options ||
3091 (checking && msg_action != MSG_LOAD) ||
3092 bi_option || test_retry_arg >= 0 || test_rewrite_arg >= 0)
3095 (daemon_listen || queue_interval >= 0) &&
3096 (sender_address != NULL || list_options || list_queue || checking ||
3100 daemon_listen && queue_interval == 0
3104 (checking || smtp_input || extract_recipients ||
3105 filter_test != FTEST_NONE || bi_option)
3108 verify_address_mode &&
3109 (address_test_mode || smtp_input || extract_recipients ||
3110 filter_test != FTEST_NONE || bi_option)
3113 address_test_mode && (smtp_input || extract_recipients ||
3114 filter_test != FTEST_NONE || bi_option)
3117 smtp_input && (sender_address != NULL || filter_test != FTEST_NONE ||
3121 deliver_selectstring != NULL && queue_interval < 0
3124 msg_action == MSG_LOAD &&
3125 (!expansion_test || expansion_test_message != NULL)
3129 fprintf(stderr, "exim: incompatible command-line options or arguments\n");
3133 /* If debugging is set up, set the file and the file descriptor to pass on to
3134 child processes. It should, of course, be 2 for stderr. Also, force the daemon
3135 to run in the foreground. */
3137 if (debug_selector != 0)
3139 debug_file = stderr;
3140 debug_fd = fileno(debug_file);
3141 background_daemon = FALSE;
3142 if (running_in_test_harness) millisleep(100); /* lets caller finish */
3143 if (debug_selector != D_v) /* -v only doesn't show this */
3145 debug_printf("Exim version %s uid=%ld gid=%ld pid=%d D=%x\n",
3146 version_string, (long int)real_uid, (long int)real_gid, (int)getpid(),
3148 show_whats_supported(stderr);
3152 /* When started with root privilege, ensure that the limits on the number of
3153 open files and the number of processes (where that is accessible) are
3154 sufficiently large, or are unset, in case Exim has been called from an
3155 environment where the limits are screwed down. Not all OS have the ability to
3156 change some of these limits. */
3160 DEBUG(D_any) debug_print_ids(US"Exim has no root privilege:");
3166 #ifdef RLIMIT_NOFILE
3167 if (getrlimit(RLIMIT_NOFILE, &rlp) < 0)
3169 log_write(0, LOG_MAIN|LOG_PANIC, "getrlimit(RLIMIT_NOFILE) failed: %s",
3171 rlp.rlim_cur = rlp.rlim_max = 0;
3174 /* I originally chose 1000 as a nice big number that was unlikely to
3175 be exceeded. It turns out that some older OS have a fixed upper limit of
3178 if (rlp.rlim_cur < 1000)
3180 rlp.rlim_cur = rlp.rlim_max = 1000;
3181 if (setrlimit(RLIMIT_NOFILE, &rlp) < 0)
3183 rlp.rlim_cur = rlp.rlim_max = 256;
3184 if (setrlimit(RLIMIT_NOFILE, &rlp) < 0)
3185 log_write(0, LOG_MAIN|LOG_PANIC, "setrlimit(RLIMIT_NOFILE) failed: %s",
3192 if (getrlimit(RLIMIT_NPROC, &rlp) < 0)
3194 log_write(0, LOG_MAIN|LOG_PANIC, "getrlimit(RLIMIT_NPROC) failed: %s",
3196 rlp.rlim_cur = rlp.rlim_max = 0;
3199 #ifdef RLIM_INFINITY
3200 if (rlp.rlim_cur != RLIM_INFINITY && rlp.rlim_cur < 1000)
3202 rlp.rlim_cur = rlp.rlim_max = RLIM_INFINITY;
3204 if (rlp.rlim_cur < 1000)
3206 rlp.rlim_cur = rlp.rlim_max = 1000;
3208 if (setrlimit(RLIMIT_NPROC, &rlp) < 0)
3209 log_write(0, LOG_MAIN|LOG_PANIC, "setrlimit(RLIMIT_NPROC) failed: %s",
3215 /* Exim is normally entered as root (but some special configurations are
3216 possible that don't do this). However, it always spins off sub-processes that
3217 set their uid and gid as required for local delivery. We don't want to pass on
3218 any extra groups that root may belong to, so we want to get rid of them all at
3221 We need to obey setgroups() at this stage, before possibly giving up root
3222 privilege for a changed configuration file, but later on we might need to
3223 check on the additional groups for the admin user privilege - can't do that
3224 till after reading the config, which might specify the exim gid. Therefore,
3225 save the group list here first. */
3227 group_count = getgroups(NGROUPS_MAX, group_list);
3229 /* There is a fundamental difference in some BSD systems in the matter of
3230 groups. FreeBSD and BSDI are known to be different; NetBSD and OpenBSD are
3231 known not to be different. On the "different" systems there is a single group
3232 list, and the first entry in it is the current group. On all other versions of
3233 Unix there is a supplementary group list, which is in *addition* to the current
3234 group. Consequently, to get rid of all extraneous groups on a "standard" system
3235 you pass over 0 groups to setgroups(), while on a "different" system you pass
3236 over a single group - the current group, which is always the first group in the
3237 list. Calling setgroups() with zero groups on a "different" system results in
3238 an error return. The following code should cope with both types of system.
3240 However, if this process isn't running as root, setgroups() can't be used
3241 since you have to be root to run it, even if throwing away groups. Not being
3242 root here happens only in some unusual configurations. We just ignore the
3245 if (setgroups(0, NULL) != 0)
3247 if (setgroups(1, group_list) != 0 && !unprivileged)
3249 fprintf(stderr, "exim: setgroups() failed: %s\n", strerror(errno));
3254 /* If the configuration file name has been altered by an argument on the
3255 command line (either a new file name or a macro definition) and the caller is
3256 not root, or if this is a filter testing run, remove any setuid privilege the
3257 program has and run as the underlying user.
3259 The exim user is locked out of this, which severely restricts the use of -C
3262 Otherwise, set the real ids to the effective values (should be root unless run
3263 from inetd, which it can either be root or the exim uid, if one is configured).
3265 There is a private mechanism for bypassing some of this, in order to make it
3266 possible to test lots of configurations automatically, without having either to
3267 recompile each time, or to patch in an actual configuration file name and other
3268 values (such as the path name). If running in the test harness, pretend that
3269 configuration file changes and macro definitions haven't happened. */
3272 (!trusted_config || /* Config changed, or */
3273 !macros_trusted()) && /* impermissible macros and */
3274 real_uid != root_uid && /* Not root, and */
3275 !running_in_test_harness /* Not fudged */
3277 expansion_test /* expansion testing */
3279 filter_test != FTEST_NONE) /* Filter testing */
3281 setgroups(group_count, group_list);
3282 exim_setugid(real_uid, real_gid, FALSE,
3283 US"-C, -D, -be or -bf forces real uid");
3284 removed_privilege = TRUE;
3286 /* In the normal case when Exim is called like this, stderr is available
3287 and should be used for any logging information because attempts to write
3288 to the log will usually fail. To arrange this, we unset really_exim. However,
3289 if no stderr is available there is no point - we might as well have a go
3290 at the log (if it fails, syslog will be written). */
3292 if (log_stderr != NULL) really_exim = FALSE;
3295 /* Privilege is to be retained for the moment. It may be dropped later,
3296 depending on the job that this Exim process has been asked to do. For now, set
3297 the real uid to the effective so that subsequent re-execs of Exim are done by a
3300 else exim_setugid(geteuid(), getegid(), FALSE, US"forcing real = effective");
3302 /* If testing a filter, open the file(s) now, before wasting time doing other
3303 setups and reading the message. */
3305 if ((filter_test & FTEST_SYSTEM) != 0)
3307 filter_sfd = Uopen(filter_test_sfile, O_RDONLY, 0);
3310 fprintf(stderr, "exim: failed to open %s: %s\n", filter_test_sfile,
3312 return EXIT_FAILURE;
3316 if ((filter_test & FTEST_USER) != 0)
3318 filter_ufd = Uopen(filter_test_ufile, O_RDONLY, 0);
3321 fprintf(stderr, "exim: failed to open %s: %s\n", filter_test_ufile,
3323 return EXIT_FAILURE;
3327 /* Read the main runtime configuration data; this gives up if there
3328 is a failure. It leaves the configuration file open so that the subsequent
3329 configuration data for delivery can be read if needed. */
3333 /* Handle the decoding of logging options. */
3335 decode_bits(&log_write_selector, &log_extra_selector, 0, 0,
3336 log_selector_string, log_options, log_options_count, US"log", 0);
3340 debug_printf("configuration file is %s\n", config_main_filename);
3341 debug_printf("log selectors = %08x %08x\n", log_write_selector,
3342 log_extra_selector);
3345 /* If domain literals are not allowed, check the sender address that was
3346 supplied with -f. Ditto for a stripped trailing dot. */
3348 if (sender_address != NULL)
3350 if (sender_address[sender_address_domain] == '[' && !allow_domain_literals)
3352 fprintf(stderr, "exim: bad -f address \"%s\": domain literals not "
3353 "allowed\n", sender_address);
3354 return EXIT_FAILURE;
3356 if (f_end_dot && !strip_trailing_dot)
3358 fprintf(stderr, "exim: bad -f address \"%s.\": domain is malformed "
3359 "(trailing dot not allowed)\n", sender_address);
3360 return EXIT_FAILURE;
3364 /* Paranoia check of maximum lengths of certain strings. There is a check
3365 on the length of the log file path in log.c, which will come into effect
3366 if there are any calls to write the log earlier than this. However, if we
3367 get this far but the string is very long, it is better to stop now than to
3368 carry on and (e.g.) receive a message and then have to collapse. The call to
3369 log_write() from here will cause the ultimate panic collapse if the complete
3370 file name exceeds the buffer length. */
3372 if (Ustrlen(log_file_path) > 200)
3373 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3374 "log_file_path is longer than 200 chars: aborting");
3376 if (Ustrlen(pid_file_path) > 200)
3377 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3378 "pid_file_path is longer than 200 chars: aborting");
3380 if (Ustrlen(spool_directory) > 200)
3381 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3382 "spool_directory is longer than 200 chars: aborting");
3384 /* Length check on the process name given to syslog for its TAG field,
3385 which is only permitted to be 32 characters or less. See RFC 3164. */
3387 if (Ustrlen(syslog_processname) > 32)
3388 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3389 "syslog_processname is longer than 32 chars: aborting");
3391 /* In some operating systems, the environment variable TMPDIR controls where
3392 temporary files are created; Exim doesn't use these (apart from when delivering
3393 to MBX mailboxes), but called libraries such as DBM libraries may require them.
3394 If TMPDIR is found in the environment, reset it to the value defined in the
3395 TMPDIR macro, if this macro is defined. */
3400 for (p = USS environ; *p != NULL; p++)
3402 if (Ustrncmp(*p, "TMPDIR=", 7) == 0 &&
3403 Ustrcmp(*p+7, TMPDIR) != 0)
3405 uschar *newp = malloc(Ustrlen(TMPDIR) + 8);
3406 sprintf(CS newp, "TMPDIR=%s", TMPDIR);
3408 DEBUG(D_any) debug_printf("reset TMPDIR=%s in environment\n", TMPDIR);
3414 /* Timezone handling. If timezone_string is "utc", set a flag to cause all
3415 timestamps to be in UTC (gmtime() is used instead of localtime()). Otherwise,
3416 we may need to get rid of a bogus timezone setting. This can arise when Exim is
3417 called by a user who has set the TZ variable. This then affects the timestamps
3418 in log files and in Received: headers, and any created Date: header lines. The
3419 required timezone is settable in the configuration file, so nothing can be done
3420 about this earlier - but hopefully nothing will normally be logged earlier than
3421 this. We have to make a new environment if TZ is wrong, but don't bother if
3422 timestamps_utc is set, because then all times are in UTC anyway. */
3424 if (timezone_string != NULL && strcmpic(timezone_string, US"UTC") == 0)
3426 timestamps_utc = TRUE;
3430 uschar *envtz = US getenv("TZ");
3431 if ((envtz == NULL && timezone_string != NULL) ||
3433 (timezone_string == NULL ||
3434 Ustrcmp(timezone_string, envtz) != 0)))
3436 uschar **p = USS environ;
3440 while (*p++ != NULL) count++;
3441 if (envtz == NULL) count++;
3442 newp = new = malloc(sizeof(uschar *) * (count + 1));
3443 for (p = USS environ; *p != NULL; p++)
3445 if (Ustrncmp(*p, "TZ=", 3) == 0) continue;
3448 if (timezone_string != NULL)
3450 *newp = malloc(Ustrlen(timezone_string) + 4);
3451 sprintf(CS *newp++, "TZ=%s", timezone_string);
3456 DEBUG(D_any) debug_printf("Reset TZ to %s: time is %s\n", timezone_string,
3457 tod_stamp(tod_log));
3461 /* Handle the case when we have removed the setuid privilege because of -C or
3462 -D. This means that the caller of Exim was not root.
3464 There is a problem if we were running as the Exim user. The sysadmin may
3465 expect this case to retain privilege because "the binary was called by the
3466 Exim user", but it hasn't, because either the -D option set macros, or the
3467 -C option set a non-trusted configuration file. There are two possibilities:
3469 (1) If deliver_drop_privilege is set, Exim is not going to re-exec in order
3470 to do message deliveries. Thus, the fact that it is running as a
3471 non-privileged user is plausible, and might be wanted in some special
3472 configurations. However, really_exim will have been set false when
3473 privilege was dropped, to stop Exim trying to write to its normal log
3474 files. Therefore, re-enable normal log processing, assuming the sysadmin
3475 has set up the log directory correctly.
3477 (2) If deliver_drop_privilege is not set, the configuration won't work as
3478 apparently intended, and so we log a panic message. In order to retain
3479 root for -C or -D, the caller must either be root or be invoking a
3480 trusted configuration file (when deliver_drop_privilege is false). */
3482 if (removed_privilege && (!trusted_config || macros != NULL) &&
3483 real_uid == exim_uid)
3485 if (deliver_drop_privilege)
3486 really_exim = TRUE; /* let logging work normally */
3488 log_write(0, LOG_MAIN|LOG_PANIC,
3489 "exim user lost privilege for using %s option",
3490 (int)exim_uid, trusted_config? "-D" : "-C");
3493 /* Start up Perl interpreter if Perl support is configured and there is a
3494 perl_startup option, and the configuration or the command line specifies
3495 initializing starting. Note that the global variables are actually called
3496 opt_perl_xxx to avoid clashing with perl's namespace (perl_*). */
3499 if (perl_start_option != 0)
3500 opt_perl_at_start = (perl_start_option > 0);
3501 if (opt_perl_at_start && opt_perl_startup != NULL)
3504 DEBUG(D_any) debug_printf("Starting Perl interpreter\n");
3505 errstr = init_perl(opt_perl_startup);
3508 fprintf(stderr, "exim: error in perl_startup code: %s\n", errstr);
3509 return EXIT_FAILURE;
3511 opt_perl_started = TRUE;
3513 #endif /* EXIM_PERL */
3515 /* Log the arguments of the call if the configuration file said so. This is
3516 a debugging feature for finding out what arguments certain MUAs actually use.
3517 Don't attempt it if logging is disabled, or if listing variables or if
3518 verifying/testing addresses or expansions. */
3520 if (((debug_selector & D_any) != 0 || (log_extra_selector & LX_arguments) != 0)
3521 && really_exim && !list_options && !checking)
3524 uschar *p = big_buffer;
3526 (void)getcwd(CS p+4, big_buffer_size - 4);
3528 (void)string_format(p, big_buffer_size - (p - big_buffer), " %d args:", argc);
3530 for (i = 0; i < argc; i++)
3532 int len = Ustrlen(argv[i]);
3535 if (p + len + 8 >= big_buffer + big_buffer_size)
3538 log_write(0, LOG_MAIN, "%s", big_buffer);
3539 Ustrcpy(big_buffer, "...");
3542 printing = string_printing(argv[i]);
3543 if (printing[0] == 0) quote = US"\""; else
3545 uschar *pp = printing;
3547 while (*pp != 0) if (isspace(*pp++)) { quote = US"\""; break; }
3549 sprintf(CS p, " %s%.*s%s", quote, (int)(big_buffer_size -
3550 (p - big_buffer) - 4), printing, quote);
3554 if ((log_extra_selector & LX_arguments) != 0)
3555 log_write(0, LOG_MAIN, "%s", big_buffer);
3557 debug_printf("%s\n", big_buffer);
3560 /* Set the working directory to be the top-level spool directory. We don't rely
3561 on this in the code, which always uses fully qualified names, but it's useful
3562 for core dumps etc. Don't complain if it fails - the spool directory might not
3563 be generally accessible and calls with the -C option (and others) have lost
3564 privilege by now. Before the chdir, we try to ensure that the directory exists.
3567 if (Uchdir(spool_directory) != 0)
3569 (void)directory_make(spool_directory, US"", SPOOL_DIRECTORY_MODE, FALSE);
3570 (void)Uchdir(spool_directory);
3573 /* Handle calls with the -bi option. This is a sendmail option to rebuild *the*
3574 alias file. Exim doesn't have such a concept, but this call is screwed into
3575 Sun's YP makefiles. Handle this by calling a configured script, as the real
3576 user who called Exim. The -oA option can be used to pass an argument to the
3581 (void)fclose(config_file);
3582 if (bi_command != NULL)
3586 argv[i++] = bi_command;
3587 if (alias_arg != NULL) argv[i++] = alias_arg;
3590 setgroups(group_count, group_list);
3591 exim_setugid(real_uid, real_gid, FALSE, US"running bi_command");
3593 DEBUG(D_exec) debug_printf("exec %.256s %.256s\n", argv[0],
3594 (argv[1] == NULL)? US"" : argv[1]);
3596 execv(CS argv[0], (char *const *)argv);
3597 fprintf(stderr, "exim: exec failed: %s\n", strerror(errno));
3602 DEBUG(D_any) debug_printf("-bi used but bi_command not set; exiting\n");
3607 /* If an action on specific messages is requested, or if a daemon or queue
3608 runner is being started, we need to know if Exim was called by an admin user.
3609 This is the case if the real user is root or exim, or if the real group is
3610 exim, or if one of the supplementary groups is exim or a group listed in
3611 admin_groups. We don't fail all message actions immediately if not admin_user,
3612 since some actions can be performed by non-admin users. Instead, set admin_user
3613 for later interrogation. */
3615 if (real_uid == root_uid || real_uid == exim_uid || real_gid == exim_gid)
3620 for (i = 0; i < group_count; i++)
3622 if (group_list[i] == exim_gid) admin_user = TRUE;
3623 else if (admin_groups != NULL)
3625 for (j = 1; j <= (int)(admin_groups[0]); j++)
3626 if (admin_groups[j] == group_list[i])
3627 { admin_user = TRUE; break; }
3629 if (admin_user) break;
3633 /* Another group of privileged users are the trusted users. These are root,
3634 exim, and any caller matching trusted_users or trusted_groups. Trusted callers
3635 are permitted to specify sender_addresses with -f on the command line, and
3636 other message parameters as well. */
3638 if (real_uid == root_uid || real_uid == exim_uid)
3639 trusted_caller = TRUE;
3644 if (trusted_users != NULL)
3646 for (i = 1; i <= (int)(trusted_users[0]); i++)
3647 if (trusted_users[i] == real_uid)
3648 { trusted_caller = TRUE; break; }
3651 if (!trusted_caller && trusted_groups != NULL)
3653 for (i = 1; i <= (int)(trusted_groups[0]); i++)
3655 if (trusted_groups[i] == real_gid)
3656 trusted_caller = TRUE;
3657 else for (j = 0; j < group_count; j++)
3659 if (trusted_groups[i] == group_list[j])
3660 { trusted_caller = TRUE; break; }
3662 if (trusted_caller) break;
3667 if (trusted_caller) DEBUG(D_any) debug_printf("trusted user\n");
3668 if (admin_user) DEBUG(D_any) debug_printf("admin user\n");
3670 /* Only an admin user may start the daemon or force a queue run in the default
3671 configuration, but the queue run restriction can be relaxed. Only an admin
3672 user may request that a message be returned to its sender forthwith. Only an
3673 admin user may specify a debug level greater than D_v (because it might show
3674 passwords, etc. in lookup queries). Only an admin user may request a queue
3675 count. Only an admin user can use the test interface to scan for email
3676 (because Exim will be in the spool dir and able to look at mails). */
3680 BOOL debugset = (debug_selector & ~D_v) != 0;
3681 if (deliver_give_up || daemon_listen || malware_test_file ||
3682 (count_queue && queue_list_requires_admin) ||
3683 (list_queue && queue_list_requires_admin) ||
3684 (queue_interval >= 0 && prod_requires_admin) ||
3685 (debugset && !running_in_test_harness))
3687 fprintf(stderr, "exim:%s permission denied\n", debugset? " debugging" : "");
3692 /* If the real user is not root or the exim uid, the argument for passing
3693 in an open TCP/IP connection for another message is not permitted, nor is
3694 running with the -N option for any delivery action, unless this call to exim is
3695 one that supplied an input message, or we are using a patched exim for
3696 regression testing. */
3698 if (real_uid != root_uid && real_uid != exim_uid &&
3699 (continue_hostname != NULL ||
3701 (queue_interval >= 0 || daemon_listen || msg_action_arg > 0)
3702 )) && !running_in_test_harness)
3704 fprintf(stderr, "exim: Permission denied\n");
3705 return EXIT_FAILURE;
3708 /* If the caller is not trusted, certain arguments are ignored when running for
3709 real, but are permitted when checking things (-be, -bv, -bt, -bh, -bf, -bF).
3710 Note that authority for performing certain actions on messages is tested in the
3711 queue_action() function. */
3713 if (!trusted_caller && !checking && filter_test == FTEST_NONE)
3715 sender_host_name = sender_host_address = interface_address =
3716 sender_ident = received_protocol = NULL;
3717 sender_host_port = interface_port = 0;
3718 sender_host_authenticated = authenticated_sender = authenticated_id = NULL;
3721 /* If a sender host address is set, extract the optional port number off the
3722 end of it and check its syntax. Do the same thing for the interface address.
3723 Exim exits if the syntax is bad. */
3727 if (sender_host_address != NULL)
3728 sender_host_port = check_port(sender_host_address);
3729 if (interface_address != NULL)
3730 interface_port = check_port(interface_address);
3733 /* If an SMTP message is being received check to see if the standard input is a
3734 TCP/IP socket. If it is, we assume that Exim was called from inetd if the
3735 caller is root or the Exim user, or if the port is a privileged one. Otherwise,
3740 union sockaddr_46 inetd_sock;
3741 EXIM_SOCKLEN_T size = sizeof(inetd_sock);
3742 if (getpeername(0, (struct sockaddr *)(&inetd_sock), &size) == 0)
3744 int family = ((struct sockaddr *)(&inetd_sock))->sa_family;
3745 if (family == AF_INET || family == AF_INET6)
3747 union sockaddr_46 interface_sock;
3748 size = sizeof(interface_sock);
3750 if (getsockname(0, (struct sockaddr *)(&interface_sock), &size) == 0)
3751 interface_address = host_ntoa(-1, &interface_sock, NULL,
3754 if (host_is_tls_on_connect_port(interface_port)) tls_on_connect = TRUE;
3756 if (real_uid == root_uid || real_uid == exim_uid || interface_port < 1024)
3759 sender_host_address = host_ntoa(-1, (struct sockaddr *)(&inetd_sock),
3760 NULL, &sender_host_port);
3761 if (mua_wrapper) log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Input from "
3762 "inetd is not supported when mua_wrapper is set");
3767 "exim: Permission denied (unprivileged user, unprivileged port)\n");
3768 return EXIT_FAILURE;
3774 /* If the load average is going to be needed while receiving a message, get it
3775 now for those OS that require the first call to os_getloadavg() to be done as
3776 root. There will be further calls later for each message received. */
3778 #ifdef LOAD_AVG_NEEDS_ROOT
3779 if (receiving_message &&
3780 (queue_only_load >= 0 ||
3781 (is_inetd && smtp_load_reserve >= 0)
3784 load_average = OS_GETLOADAVG();
3788 /* The queue_only configuration option can be overridden by -odx on the command
3789 line, except that if queue_only_override is false, queue_only cannot be unset
3790 from the command line. */
3792 if (queue_only_set && (queue_only_override || arg_queue_only))
3793 queue_only = arg_queue_only;
3795 /* The receive_timeout and smtp_receive_timeout options can be overridden by
3798 if (arg_receive_timeout >= 0) receive_timeout = arg_receive_timeout;
3799 if (arg_smtp_receive_timeout >= 0)
3800 smtp_receive_timeout = arg_smtp_receive_timeout;
3802 /* If Exim was started with root privilege, unless we have already removed the
3803 root privilege above as a result of -C, -D, -be, -bf or -bF, remove it now
3804 except when starting the daemon or doing some kind of delivery or address
3805 testing (-bt). These are the only cases when root need to be retained. We run
3806 as exim for -bv and -bh. However, if deliver_drop_privilege is set, root is
3807 retained only for starting the daemon. We always do the initgroups() in this
3808 situation (controlled by the TRUE below), in order to be as close as possible
3809 to the state Exim usually runs in. */
3811 if (!unprivileged && /* originally had root AND */
3812 !removed_privilege && /* still got root AND */
3813 !daemon_listen && /* not starting the daemon */
3814 queue_interval <= 0 && /* (either kind of daemon) */
3816 deliver_drop_privilege || /* requested unprivileged */
3818 queue_interval < 0 && /* not running the queue */
3819 (msg_action_arg < 0 || /* and */
3820 msg_action != MSG_DELIVER) && /* not delivering and */
3821 (!checking || !address_test_mode) /* not address checking */
3825 exim_setugid(exim_uid, exim_gid, TRUE, US"privilege not needed");
3828 /* When we are retaining a privileged uid, we still change to the exim gid. */
3830 else setgid(exim_gid);
3832 /* Handle a request to scan a file for malware */
3833 if (malware_test_file)
3835 #ifdef WITH_CONTENT_SCAN
3837 set_process_info("scanning file for malware");
3838 result = malware_in_file(malware_test_file);
3841 printf("No malware found.\n");
3846 printf("Malware lookup returned non-okay/fail: %d\n", result);
3850 printf("Malware found: %s\n", malware_name);
3852 printf("Malware scan detected malware of unknown name.\n");
3854 printf("Malware scanning not enabled at compile time.\n");
3859 /* Handle a request to list the delivery queue */
3863 set_process_info("listing the queue");
3864 queue_list(list_queue_option, argv + recipients_arg, argc - recipients_arg);
3868 /* Handle a request to count the delivery queue */
3872 set_process_info("counting the queue");
3877 /* Handle actions on specific messages, except for the force delivery and
3878 message load actions, which are done below. Some actions take a whole list of
3879 message ids, which are known to continue up to the end of the arguments. Others
3880 take a single message id and then operate on the recipients list. */
3882 if (msg_action_arg > 0 && msg_action != MSG_DELIVER && msg_action != MSG_LOAD)
3884 int yield = EXIT_SUCCESS;
3885 set_process_info("acting on specified messages");
3887 if (!one_msg_action)
3889 for (i = msg_action_arg; i < argc; i++)
3890 if (!queue_action(argv[i], msg_action, NULL, 0, 0))
3891 yield = EXIT_FAILURE;
3894 else if (!queue_action(argv[msg_action_arg], msg_action, argv, argc,
3895 recipients_arg)) yield = EXIT_FAILURE;
3899 /* All the modes below here require the remaining configuration sections
3900 to be read, except that we can skip over the ACL setting when delivering
3901 specific messages, or doing a queue run. (For various testing cases we could
3902 skip too, but as they are rare, it doesn't really matter.) The argument is TRUE
3905 readconf_rest(msg_action_arg > 0 || (queue_interval == 0 && !daemon_listen));
3907 /* The configuration data will have been read into POOL_PERM because we won't
3908 ever want to reset back past it. Change the current pool to POOL_MAIN. In fact,
3909 this is just a bit of pedantic tidiness. It wouldn't really matter if the
3910 configuration were read into POOL_MAIN, because we don't do any resets till
3911 later on. However, it seems right, and it does ensure that both pools get used.
3914 store_pool = POOL_MAIN;
3916 /* Handle the -brt option. This is for checking out retry configurations.
3917 The next three arguments are a domain name or a complete address, and
3918 optionally two error numbers. All it does is to call the function that
3919 scans the retry configuration data. */
3921 if (test_retry_arg >= 0)
3923 retry_config *yield;
3924 int basic_errno = 0;
3928 if (test_retry_arg >= argc)
3930 printf("-brt needs a domain or address argument\n");
3931 exim_exit(EXIT_FAILURE);
3933 s1 = argv[test_retry_arg++];
3936 /* If the first argument contains no @ and no . it might be a local user
3937 or it might be a single-component name. Treat as a domain. */
3939 if (Ustrchr(s1, '@') == NULL && Ustrchr(s1, '.') == NULL)
3941 printf("Warning: \"%s\" contains no '@' and no '.' characters. It is "
3942 "being \ntreated as a one-component domain, not as a local part.\n\n",
3946 /* There may be an optional second domain arg. */
3948 if (test_retry_arg < argc && Ustrchr(argv[test_retry_arg], '.') != NULL)
3949 s2 = argv[test_retry_arg++];
3951 /* The final arg is an error name */
3953 if (test_retry_arg < argc)
3955 uschar *ss = argv[test_retry_arg];
3957 readconf_retry_error(ss, ss + Ustrlen(ss), &basic_errno, &more_errno);
3960 printf("%s\n", CS error);
3961 return EXIT_FAILURE;
3964 /* For the {MAIL,RCPT,DATA}_4xx errors, a value of 255 means "any", and a
3965 code > 100 as an error is for matching codes to the decade. Turn them into
3966 a real error code, off the decade. */
3968 if (basic_errno == ERRNO_MAIL4XX ||
3969 basic_errno == ERRNO_RCPT4XX ||
3970 basic_errno == ERRNO_DATA4XX)
3972 int code = (more_errno >> 8) & 255;
3974 more_errno = (more_errno & 0xffff00ff) | (21 << 8);
3975 else if (code > 100)
3976 more_errno = (more_errno & 0xffff00ff) | ((code - 96) << 8);
3980 yield = retry_find_config(s1, s2, basic_errno, more_errno);
3981 if (yield == NULL) printf("No retry information found\n"); else
3984 more_errno = yield->more_errno;
3985 printf("Retry rule: %s ", yield->pattern);
3987 if (yield->basic_errno == ERRNO_EXIMQUOTA)
3989 printf("quota%s%s ",
3990 (more_errno > 0)? "_" : "",
3991 (more_errno > 0)? readconf_printtime(more_errno) : US"");
3993 else if (yield->basic_errno == ECONNREFUSED)
3995 printf("refused%s%s ",
3996 (more_errno > 0)? "_" : "",
3997 (more_errno == 'M')? "MX" :
3998 (more_errno == 'A')? "A" : "");
4000 else if (yield->basic_errno == ETIMEDOUT)
4003 if ((more_errno & RTEF_CTOUT) != 0) printf("_connect");
4005 if (more_errno != 0) printf("_%s",
4006 (more_errno == 'M')? "MX" : "A");
4009 else if (yield->basic_errno == ERRNO_AUTHFAIL)
4010 printf("auth_failed ");
4013 for (r = yield->rules; r != NULL; r = r->next)
4015 printf("%c,%s", r->rule, readconf_printtime(r->timeout)); /* Do not */
4016 printf(",%s", readconf_printtime(r->p1)); /* amalgamate */
4022 printf(",%d.", x/1000);
4036 exim_exit(EXIT_SUCCESS);
4039 /* Handle a request to list one or more configuration options */
4043 set_process_info("listing variables");
4044 if (recipients_arg >= argc) readconf_print(US"all", NULL);
4045 else for (i = recipients_arg; i < argc; i++)
4048 (Ustrcmp(argv[i], "router") == 0 ||
4049 Ustrcmp(argv[i], "transport") == 0 ||
4050 Ustrcmp(argv[i], "authenticator") == 0 ||
4051 Ustrcmp(argv[i], "macro") == 0))
4053 readconf_print(argv[i+1], argv[i]);
4056 else readconf_print(argv[i], NULL);
4058 exim_exit(EXIT_SUCCESS);
4062 /* Handle a request to deliver one or more messages that are already on the
4063 queue. Values of msg_action other than MSG_DELIVER and MSG_LOAD are dealt with
4064 above. MSG_LOAD is handled with -be (which is the only time it applies) below.
4066 Delivery of specific messages is typically used for a small number when
4067 prodding by hand (when the option forced_delivery will be set) or when
4068 re-execing to regain root privilege. Each message delivery must happen in a
4069 separate process, so we fork a process for each one, and run them sequentially
4070 so that debugging output doesn't get intertwined, and to avoid spawning too
4071 many processes if a long list is given. However, don't fork for the last one;
4072 this saves a process in the common case when Exim is called to deliver just one
4075 if (msg_action_arg > 0 && msg_action != MSG_LOAD)
4077 if (prod_requires_admin && !admin_user)
4079 fprintf(stderr, "exim: Permission denied\n");
4080 exim_exit(EXIT_FAILURE);
4082 set_process_info("delivering specified messages");
4083 if (deliver_give_up) forced_delivery = deliver_force_thaw = TRUE;
4084 for (i = msg_action_arg; i < argc; i++)
4089 (void)deliver_message(argv[i], forced_delivery, deliver_give_up);
4090 else if ((pid = fork()) == 0)
4092 (void)deliver_message(argv[i], forced_delivery, deliver_give_up);
4093 _exit(EXIT_SUCCESS);
4097 fprintf(stderr, "failed to fork delivery process for %s: %s\n", argv[i],
4099 exim_exit(EXIT_FAILURE);
4103 exim_exit(EXIT_SUCCESS);
4107 /* If only a single queue run is requested, without SMTP listening, we can just
4108 turn into a queue runner, with an optional starting message id. */
4110 if (queue_interval == 0 && !daemon_listen)
4112 DEBUG(D_queue_run) debug_printf("Single queue run%s%s%s%s\n",
4113 (start_queue_run_id == NULL)? US"" : US" starting at ",
4114 (start_queue_run_id == NULL)? US"" : start_queue_run_id,
4115 (stop_queue_run_id == NULL)? US"" : US" stopping at ",
4116 (stop_queue_run_id == NULL)? US"" : stop_queue_run_id);
4117 set_process_info("running the queue (single queue run)");
4118 queue_run(start_queue_run_id, stop_queue_run_id, FALSE);
4119 exim_exit(EXIT_SUCCESS);
4123 /* Find the login name of the real user running this process. This is always
4124 needed when receiving a message, because it is written into the spool file. It
4125 may also be used to construct a from: or a sender: header, and in this case we
4126 need the user's full name as well, so save a copy of it, checked for RFC822
4127 syntax and munged if necessary, if it hasn't previously been set by the -F
4128 argument. We may try to get the passwd entry more than once, in case NIS or
4129 other delays are in evidence. Save the home directory for use in filter testing
4134 if ((pw = getpwuid(real_uid)) != NULL)
4136 originator_login = string_copy(US pw->pw_name);
4137 originator_home = string_copy(US pw->pw_dir);
4139 /* If user name has not been set by -F, set it from the passwd entry
4140 unless -f has been used to set the sender address by a trusted user. */
4142 if (originator_name == NULL)
4144 if (sender_address == NULL ||
4145 (!trusted_caller && filter_test == FTEST_NONE))
4147 uschar *name = US pw->pw_gecos;
4148 uschar *amp = Ustrchr(name, '&');
4151 /* Most Unix specify that a '&' character in the gecos field is
4152 replaced by a copy of the login name, and some even specify that
4153 the first character should be upper cased, so that's what we do. */
4158 string_format(buffer, sizeof(buffer), "%.*s%n%s%s",
4159 amp - name, name, &loffset, originator_login, amp + 1);
4160 buffer[loffset] = toupper(buffer[loffset]);
4164 /* If a pattern for matching the gecos field was supplied, apply
4165 it and then expand the name string. */
4167 if (gecos_pattern != NULL && gecos_name != NULL)
4170 re = regex_must_compile(gecos_pattern, FALSE, TRUE); /* Use malloc */
4172 if (regex_match_and_setup(re, name, 0, -1))
4174 uschar *new_name = expand_string(gecos_name);
4176 if (new_name != NULL)
4178 DEBUG(D_receive) debug_printf("user name \"%s\" extracted from "
4179 "gecos field \"%s\"\n", new_name, name);
4182 else DEBUG(D_receive) debug_printf("failed to expand gecos_name string "
4183 "\"%s\": %s\n", gecos_name, expand_string_message);
4185 else DEBUG(D_receive) debug_printf("gecos_pattern \"%s\" did not match "
4186 "gecos field \"%s\"\n", gecos_pattern, name);
4187 store_free((void *)re);
4189 originator_name = string_copy(name);
4192 /* A trusted caller has used -f but not -F */
4194 else originator_name = US"";
4197 /* Break the retry loop */
4202 if (++i > finduser_retries) break;
4206 /* If we cannot get a user login, log the incident and give up, unless the
4207 configuration specifies something to use. When running in the test harness,
4208 any setting of unknown_login overrides the actual name. */
4210 if (originator_login == NULL || running_in_test_harness)
4212 if (unknown_login != NULL)
4214 originator_login = expand_string(unknown_login);
4215 if (originator_name == NULL && unknown_username != NULL)
4216 originator_name = expand_string(unknown_username);
4217 if (originator_name == NULL) originator_name = US"";
4219 if (originator_login == NULL)
4220 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Failed to get user name for uid %d",
4224 /* Ensure that the user name is in a suitable form for use as a "phrase" in an
4227 originator_name = string_copy(parse_fix_phrase(originator_name,
4228 Ustrlen(originator_name), big_buffer, big_buffer_size));
4230 /* If a message is created by this call of Exim, the uid/gid of its originator
4231 are those of the caller. These values are overridden if an existing message is
4232 read in from the spool. */
4234 originator_uid = real_uid;
4235 originator_gid = real_gid;
4237 DEBUG(D_receive) debug_printf("originator: uid=%d gid=%d login=%s name=%s\n",
4238 (int)originator_uid, (int)originator_gid, originator_login, originator_name);
4240 /* Run in daemon and/or queue-running mode. The function daemon_go() never
4241 returns. We leave this till here so that the originator_ fields are available
4242 for incoming messages via the daemon. The daemon cannot be run in mua_wrapper
4245 if (daemon_listen || queue_interval > 0)
4249 fprintf(stderr, "Daemon cannot be run when mua_wrapper is set\n");
4250 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Daemon cannot be run when "
4251 "mua_wrapper is set");
4256 /* If the sender ident has not been set (by a trusted caller) set it to
4257 the caller. This will get overwritten below for an inetd call. If a trusted
4258 caller has set it empty, unset it. */
4260 if (sender_ident == NULL) sender_ident = originator_login;
4261 else if (sender_ident[0] == 0) sender_ident = NULL;
4263 /* Handle the -brw option, which is for checking out rewriting rules. Cause log
4264 writes (on errors) to go to stderr instead. Can't do this earlier, as want the
4265 originator_* variables set. */
4267 if (test_rewrite_arg >= 0)
4269 really_exim = FALSE;
4270 if (test_rewrite_arg >= argc)
4272 printf("-brw needs an address argument\n");
4273 exim_exit(EXIT_FAILURE);
4275 rewrite_test(argv[test_rewrite_arg]);
4276 exim_exit(EXIT_SUCCESS);
4279 /* A locally-supplied message is considered to be coming from a local user
4280 unless a trusted caller supplies a sender address with -f, or is passing in the
4281 message via SMTP (inetd invocation or otherwise). */
4283 if ((sender_address == NULL && !smtp_input) ||
4284 (!trusted_caller && filter_test == FTEST_NONE))
4286 sender_local = TRUE;
4288 /* A trusted caller can supply authenticated_sender and authenticated_id
4289 via -oMas and -oMai and if so, they will already be set. Otherwise, force
4290 defaults except when host checking. */
4292 if (authenticated_sender == NULL && !host_checking)
4293 authenticated_sender = string_sprintf("%s@%s", originator_login,
4294 qualify_domain_sender);
4295 if (authenticated_id == NULL && !host_checking)
4296 authenticated_id = originator_login;
4299 /* Trusted callers are always permitted to specify the sender address.
4300 Untrusted callers may specify it if it matches untrusted_set_sender, or if what
4301 is specified is the empty address. However, if a trusted caller does not
4302 specify a sender address for SMTP input, we leave sender_address unset. This
4303 causes the MAIL commands to be honoured. */
4305 if ((!smtp_input && sender_address == NULL) ||
4306 !receive_check_set_sender(sender_address))
4308 /* Either the caller is not permitted to set a general sender, or this is
4309 non-SMTP input and the trusted caller has not set a sender. If there is no
4310 sender, or if a sender other than <> is set, override with the originator's
4311 login (which will get qualified below), except when checking things. */
4313 if (sender_address == NULL /* No sender_address set */
4315 (sender_address[0] != 0 && /* Non-empty sender address, AND */
4316 !checking && /* Not running tests, AND */
4317 filter_test == FTEST_NONE)) /* Not testing a filter */
4319 sender_address = originator_login;
4320 sender_address_forced = FALSE;
4321 sender_address_domain = 0;
4325 /* Remember whether an untrusted caller set the sender address */
4327 sender_set_untrusted = sender_address != originator_login && !trusted_caller;
4329 /* Ensure that the sender address is fully qualified unless it is the empty
4330 address, which indicates an error message, or doesn't exist (root caller, smtp
4331 interface, no -f argument). */
4333 if (sender_address != NULL && sender_address[0] != 0 &&
4334 sender_address_domain == 0)
4335 sender_address = string_sprintf("%s@%s", local_part_quote(sender_address),
4336 qualify_domain_sender);
4338 DEBUG(D_receive) debug_printf("sender address = %s\n", sender_address);
4340 /* Handle a request to verify a list of addresses, or test them for delivery.
4341 This must follow the setting of the sender address, since routers can be
4342 predicated upon the sender. If no arguments are given, read addresses from
4343 stdin. Set debug_level to at least D_v to get full output for address testing.
4346 if (verify_address_mode || address_test_mode)
4349 int flags = vopt_qualify;
4351 if (verify_address_mode)
4353 if (!verify_as_sender) flags |= vopt_is_recipient;
4354 DEBUG(D_verify) debug_print_ids(US"Verifying:");
4359 flags |= vopt_is_recipient;
4360 debug_selector |= D_v;
4361 debug_file = stderr;
4362 debug_fd = fileno(debug_file);
4363 DEBUG(D_verify) debug_print_ids(US"Address testing:");
4366 if (recipients_arg < argc)
4368 while (recipients_arg < argc)
4370 uschar *s = argv[recipients_arg++];
4373 BOOL finished = FALSE;
4374 uschar *ss = parse_find_address_end(s, FALSE);
4375 if (*ss == ',') *ss = 0; else finished = TRUE;
4376 test_address(s, flags, &exit_value);
4379 while (*(++s) != 0 && (*s == ',' || isspace(*s)));
4386 uschar *s = get_stdinput(NULL, NULL);
4387 if (s == NULL) break;
4388 test_address(s, flags, &exit_value);
4392 exim_exit(exit_value);
4395 /* Handle expansion checking. Either expand items on the command line, or read
4396 from stdin if there aren't any. If -Mset was specified, load the message so
4397 that its variables can be used, but restrict this facility to admin users.
4398 Otherwise, if -bem was used, read a message from stdin. */
4402 if (msg_action_arg > 0 && msg_action == MSG_LOAD)
4404 uschar spoolname[256]; /* Not big_buffer; used in spool_read_header() */
4407 fprintf(stderr, "exim: permission denied\n");
4410 message_id = argv[msg_action_arg];
4411 (void)string_format(spoolname, sizeof(spoolname), "%s-H", message_id);
4412 if (!spool_open_datafile(message_id))
4413 printf ("Failed to load message datafile %s\n", message_id);
4414 if (spool_read_header(spoolname, TRUE, FALSE) != spool_read_OK)
4415 printf ("Failed to load message %s\n", message_id);
4418 /* Read a test message from a file. We fudge it up to be on stdin, saving
4419 stdin itself for later reading of expansion strings. */
4421 else if (expansion_test_message != NULL)
4423 int save_stdin = dup(0);
4424 int fd = Uopen(expansion_test_message, O_RDONLY, 0);
4427 fprintf(stderr, "exim: failed to open %s: %s\n", expansion_test_message,
4429 return EXIT_FAILURE;
4432 filter_test = FTEST_USER; /* Fudge to make it look like filter test */
4433 message_ended = END_NOTENDED;
4434 read_message_body(receive_msg(extract_recipients));
4435 message_linecount += body_linecount;
4436 (void)dup2(save_stdin, 0);
4437 (void)close(save_stdin);
4438 clearerr(stdin); /* Required by Darwin */
4441 /* Allow $recipients for this testing */
4443 enable_dollar_recipients = TRUE;
4445 /* Expand command line items */
4447 if (recipients_arg < argc)
4449 while (recipients_arg < argc)
4451 uschar *s = argv[recipients_arg++];
4452 uschar *ss = expand_string(s);
4453 if (ss == NULL) printf ("Failed: %s\n", expand_string_message);
4454 else printf("%s\n", CS ss);
4462 char *(*fn_readline)(char *) = NULL;
4463 char *(*fn_addhist)(char *) = NULL;
4466 void *dlhandle = set_readline(&fn_readline, &fn_addhist);
4472 uschar *source = get_stdinput(fn_readline, fn_addhist);
4473 if (source == NULL) break;
4474 ss = expand_string(source);
4476 printf ("Failed: %s\n", expand_string_message);
4477 else printf("%s\n", CS ss);
4481 if (dlhandle != NULL) dlclose(dlhandle);
4485 /* The data file will be open after -Mset */
4487 if (deliver_datafile >= 0)
4489 (void)close(deliver_datafile);
4490 deliver_datafile = -1;
4493 exim_exit(EXIT_SUCCESS);
4497 /* The active host name is normally the primary host name, but it can be varied
4498 for hosts that want to play several parts at once. We need to ensure that it is
4499 set for host checking, and for receiving messages. */
4501 smtp_active_hostname = primary_hostname;
4502 if (raw_active_hostname != NULL)
4504 uschar *nah = expand_string(raw_active_hostname);
4507 if (!expand_string_forcedfail)
4508 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to expand \"%s\" "
4509 "(smtp_active_hostname): %s", raw_active_hostname,
4510 expand_string_message);
4512 else if (nah[0] != 0) smtp_active_hostname = nah;
4515 /* Handle host checking: this facility mocks up an incoming SMTP call from a
4516 given IP address so that the blocking and relay configuration can be tested.
4517 Unless a sender_ident was set by -oMt, we discard it (the default is the
4518 caller's login name). An RFC 1413 call is made only if we are running in the
4519 test harness and an incoming interface and both ports are specified, because
4520 there is no TCP/IP call to find the ident for. */
4527 if (!sender_ident_set)
4529 sender_ident = NULL;
4530 if (running_in_test_harness && sender_host_port != 0 &&
4531 interface_address != NULL && interface_port != 0)
4532 verify_get_ident(1413);
4535 /* In case the given address is a non-canonical IPv6 address, canonicize
4536 it. The code works for both IPv4 and IPv6, as it happens. */
4538 size = host_aton(sender_host_address, x);
4539 sender_host_address = store_get(48); /* large enough for full IPv6 */
4540 (void)host_nmtoa(size, x, -1, sender_host_address, ':');
4542 /* Now set up for testing */
4544 host_build_sender_fullhost();
4548 sender_local = FALSE;
4549 sender_host_notsocket = TRUE;
4550 debug_file = stderr;
4551 debug_fd = fileno(debug_file);
4552 fprintf(stdout, "\n**** SMTP testing session as if from host %s\n"
4553 "**** but without any ident (RFC 1413) callback.\n"
4554 "**** This is not for real!\n\n",
4555 sender_host_address);
4557 if (verify_check_host(&hosts_connection_nolog) == OK)
4558 log_write_selector &= ~L_smtp_connection;
4559 log_write(L_smtp_connection, LOG_MAIN, "%s", smtp_get_connection_info());
4561 /* NOTE: We do *not* call smtp_log_no_mail() if smtp_start_session() fails,
4562 because a log line has already been written for all its failure exists
4563 (usually "connection refused: <reason>") and writing another one is
4564 unnecessary clutter. */
4566 if (smtp_start_session())
4568 reset_point = store_get(0);
4571 store_reset(reset_point);
4572 if (smtp_setup_msg() <= 0) break;
4573 if (!receive_msg(FALSE)) break;
4577 exim_exit(EXIT_SUCCESS);
4581 /* Arrange for message reception if recipients or SMTP were specified;
4582 otherwise complain unless a version print (-bV) happened or this is a filter
4583 verification test. In the former case, show the configuration file name. */
4585 if (recipients_arg >= argc && !extract_recipients && !smtp_input)
4587 if (version_printed)
4589 printf("Configuration file is %s\n", config_main_filename);
4590 return EXIT_SUCCESS;
4593 if (filter_test == FTEST_NONE)
4594 exim_usage(called_as);
4598 /* If mua_wrapper is set, Exim is being used to turn an MUA that submits on the
4599 standard input into an MUA that submits to a smarthost over TCP/IP. We know
4600 that we are not called from inetd, because that is rejected above. The
4601 following configuration settings are forced here:
4603 (1) Synchronous delivery (-odi)
4604 (2) Errors to stderr (-oep == -oeq)
4605 (3) No parallel remote delivery
4606 (4) Unprivileged delivery
4608 We don't force overall queueing options because there are several of them;
4609 instead, queueing is avoided below when mua_wrapper is set. However, we do need
4610 to override any SMTP queueing. */
4614 synchronous_delivery = TRUE;
4615 arg_error_handling = ERRORS_STDERR;
4616 remote_max_parallel = 1;
4617 deliver_drop_privilege = TRUE;
4619 queue_smtp_domains = NULL;
4623 /* Prepare to accept one or more new messages on the standard input. When a
4624 message has been read, its id is returned in message_id[]. If doing immediate
4625 delivery, we fork a delivery process for each received message, except for the
4626 last one, where we can save a process switch.
4628 It is only in non-smtp mode that error_handling is allowed to be changed from
4629 its default of ERRORS_SENDER by argument. (Idle thought: are any of the
4630 sendmail error modes other than -oem ever actually used? Later: yes.) */
4632 if (!smtp_input) error_handling = arg_error_handling;
4634 /* If this is an inetd call, ensure that stderr is closed to prevent panic
4635 logging being sent down the socket and make an identd call to get the
4640 (void)fclose(stderr);
4641 exim_nullstd(); /* Re-open to /dev/null */
4642 verify_get_ident(IDENT_PORT);
4643 host_build_sender_fullhost();
4644 set_process_info("handling incoming connection from %s via inetd",
4648 /* If the sender host address has been set, build sender_fullhost if it hasn't
4649 already been done (which it will have been for inetd). This caters for the
4650 case when it is forced by -oMa. However, we must flag that it isn't a socket,
4651 so that the test for IP options is skipped for -bs input. */
4653 if (sender_host_address != NULL && sender_fullhost == NULL)
4655 host_build_sender_fullhost();
4656 set_process_info("handling incoming connection from %s via -oMa",
4658 sender_host_notsocket = TRUE;
4661 /* Otherwise, set the sender host as unknown except for inetd calls. This
4662 prevents host checking in the case of -bs not from inetd and also for -bS. */
4664 else if (!is_inetd) sender_host_unknown = TRUE;
4666 /* If stdout does not exist, then dup stdin to stdout. This can happen
4667 if exim is started from inetd. In this case fd 0 will be set to the socket,
4668 but fd 1 will not be set. This also happens for passed SMTP channels. */
4670 if (fstat(1, &statbuf) < 0) (void)dup2(0, 1);
4672 /* Set up the incoming protocol name and the state of the program. Root is
4673 allowed to force received protocol via the -oMr option above. If we have come
4674 via inetd, the process info has already been set up. We don't set
4675 received_protocol here for smtp input, as it varies according to
4676 batch/HELO/EHLO/AUTH/TLS. */
4680 if (!is_inetd) set_process_info("accepting a local %sSMTP message from <%s>",
4681 smtp_batched_input? "batched " : "",
4682 (sender_address!= NULL)? sender_address : originator_login);
4686 if (received_protocol == NULL)
4687 received_protocol = string_sprintf("local%s", called_as);
4688 set_process_info("accepting a local non-SMTP message from <%s>",
4692 /* Initialize the session_local_queue-only flag (this will be ignored if
4693 mua_wrapper is set) */
4696 session_local_queue_only = queue_only;
4698 /* For non-SMTP and for batched SMTP input, check that there is enough space on
4699 the spool if so configured. On failure, we must not attempt to send an error
4700 message! (For interactive SMTP, the check happens at MAIL FROM and an SMTP
4701 error code is given.) */
4703 if ((!smtp_input || smtp_batched_input) && !receive_check_fs(0))
4705 fprintf(stderr, "exim: insufficient disk space\n");
4706 return EXIT_FAILURE;
4709 /* If this is smtp input of any kind, real or batched, handle the start of the
4712 NOTE: We do *not* call smtp_log_no_mail() if smtp_start_session() fails,
4713 because a log line has already been written for all its failure exists
4714 (usually "connection refused: <reason>") and writing another one is
4715 unnecessary clutter. */
4721 if (verify_check_host(&hosts_connection_nolog) == OK)
4722 log_write_selector &= ~L_smtp_connection;
4723 log_write(L_smtp_connection, LOG_MAIN, "%s", smtp_get_connection_info());
4724 if (!smtp_start_session())
4727 exim_exit(EXIT_SUCCESS);
4731 /* Otherwise, set up the input size limit here. */
4735 thismessage_size_limit = expand_string_integer(message_size_limit, TRUE);
4736 if (expand_string_message != NULL)
4738 if (thismessage_size_limit == -1)
4739 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to expand "
4740 "message_size_limit: %s", expand_string_message);
4742 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "invalid value for "
4743 "message_size_limit: %s", expand_string_message);
4747 /* Loop for several messages when reading SMTP input. If we fork any child
4748 processes, we don't want to wait for them unless synchronous delivery is
4749 requested, so set SIGCHLD to SIG_IGN in that case. This is not necessarily the
4750 same as SIG_DFL, despite the fact that documentation often lists the default as
4751 "ignore". This is a confusing area. This is what I know:
4753 At least on some systems (e.g. Solaris), just setting SIG_IGN causes child
4754 processes that complete simply to go away without ever becoming defunct. You
4755 can't then wait for them - but we don't want to wait for them in the
4756 non-synchronous delivery case. However, this behaviour of SIG_IGN doesn't
4757 happen for all OS (e.g. *BSD is different).
4759 But that's not the end of the story. Some (many? all?) systems have the
4760 SA_NOCLDWAIT option for sigaction(). This requests the behaviour that Solaris
4761 has by default, so it seems that the difference is merely one of default
4762 (compare restarting vs non-restarting signals).
4764 To cover all cases, Exim sets SIG_IGN with SA_NOCLDWAIT here if it can. If not,
4765 it just sets SIG_IGN. To be on the safe side it also calls waitpid() at the end
4766 of the loop below. Paranoia rules.
4768 February 2003: That's *still* not the end of the story. There are now versions
4769 of Linux (where SIG_IGN does work) that are picky. If, having set SIG_IGN, a
4770 process then calls waitpid(), a grumble is written to the system log, because
4771 this is logically inconsistent. In other words, it doesn't like the paranoia.
4772 As a consequenc of this, the waitpid() below is now excluded if we are sure
4773 that SIG_IGN works. */
4775 if (!synchronous_delivery)
4778 struct sigaction act;
4779 act.sa_handler = SIG_IGN;
4780 sigemptyset(&(act.sa_mask));
4781 act.sa_flags = SA_NOCLDWAIT;
4782 sigaction(SIGCHLD, &act, NULL);
4784 signal(SIGCHLD, SIG_IGN);
4788 /* Save the current store pool point, for resetting at the start of
4789 each message, and save the real sender address, if any. */
4791 reset_point = store_get(0);
4792 real_sender_address = sender_address;
4794 /* Loop to receive messages; receive_msg() returns TRUE if there are more
4795 messages to be read (SMTP input), or FALSE otherwise (not SMTP, or SMTP channel
4800 store_reset(reset_point);
4803 /* Handle the SMTP case; call smtp_setup_mst() to deal with the initial SMTP
4804 input and build the recipients list, before calling receive_msg() to read the
4805 message proper. Whatever sender address is given in the SMTP transaction is
4806 often ignored for local senders - we use the actual sender, which is normally
4807 either the underlying user running this process or a -f argument provided by
4808 a trusted caller. It is saved in real_sender_address. The test for whether to
4809 accept the SMTP sender is encapsulated in receive_check_set_sender(). */
4814 if ((rc = smtp_setup_msg()) > 0)
4816 if (real_sender_address != NULL &&
4817 !receive_check_set_sender(sender_address))
4819 sender_address = raw_sender = real_sender_address;
4820 sender_address_unrewritten = NULL;
4823 /* For batched SMTP, we have to run the acl_not_smtp_start ACL, since it
4824 isn't really SMTP, so no other ACL will run until the acl_not_smtp one at
4825 the very end. The result of the ACL is ignored (as for other non-SMTP
4826 messages). It is run for its potential side effects. */
4828 if (smtp_batched_input && acl_not_smtp_start != NULL)
4830 uschar *user_msg, *log_msg;
4831 enable_dollar_recipients = TRUE;
4832 (void)acl_check(ACL_WHERE_NOTSMTP_START, NULL, acl_not_smtp_start,
4833 &user_msg, &log_msg);
4834 enable_dollar_recipients = FALSE;
4837 /* Now get the data for the message */
4839 more = receive_msg(extract_recipients);
4840 if (message_id[0] == 0)
4843 smtp_log_no_mail(); /* Log no mail if configured */
4844 exim_exit(EXIT_FAILURE);
4849 smtp_log_no_mail(); /* Log no mail if configured */
4850 exim_exit((rc == 0)? EXIT_SUCCESS : EXIT_FAILURE);
4854 /* In the non-SMTP case, we have all the information from the command
4855 line, but must process it in case it is in the more general RFC822
4856 format, and in any case, to detect syntax errors. Also, it appears that
4857 the use of comma-separated lists as single arguments is common, so we
4858 had better support them. */
4864 int count = argc - recipients_arg;
4865 uschar **list = argv + recipients_arg;
4867 /* These options cannot be changed dynamically for non-SMTP messages */
4869 active_local_sender_retain = local_sender_retain;
4870 active_local_from_check = local_from_check;
4872 /* Save before any rewriting */
4874 raw_sender = string_copy(sender_address);
4876 /* Loop for each argument */
4878 for (i = 0; i < count; i++)
4880 int start, end, domain;
4882 uschar *s = list[i];
4884 /* Loop for each comma-separated address */
4888 BOOL finished = FALSE;
4890 uschar *ss = parse_find_address_end(s, FALSE);
4892 if (*ss == ',') *ss = 0; else finished = TRUE;
4894 /* Check max recipients - if -t was used, these aren't recipients */
4896 if (recipients_max > 0 && ++rcount > recipients_max &&
4897 !extract_recipients)
4899 if (error_handling == ERRORS_STDERR)
4901 fprintf(stderr, "exim: too many recipients\n");
4902 exim_exit(EXIT_FAILURE);
4907 moan_to_sender(ERRMESS_TOOMANYRECIP, NULL, NULL, stdin, TRUE)?
4908 errors_sender_rc : EXIT_FAILURE;
4913 parse_extract_address(s, &errmess, &start, &end, &domain, FALSE);
4915 if (domain == 0 && !allow_unqualified_recipient)
4918 errmess = US"unqualified recipient address not allowed";
4921 if (recipient == NULL)
4923 if (error_handling == ERRORS_STDERR)
4925 fprintf(stderr, "exim: bad recipient address \"%s\": %s\n",
4926 string_printing(list[i]), errmess);
4927 exim_exit(EXIT_FAILURE);
4933 eblock.text1 = string_printing(list[i]);
4934 eblock.text2 = errmess;
4936 moan_to_sender(ERRMESS_BADARGADDRESS, &eblock, NULL, stdin, TRUE)?
4937 errors_sender_rc : EXIT_FAILURE;
4941 receive_add_recipient(recipient, -1);
4944 while (*(++s) != 0 && (*s == ',' || isspace(*s)));
4948 /* Show the recipients when debugging */
4953 if (sender_address != NULL) debug_printf("Sender: %s\n", sender_address);
4954 if (recipients_list != NULL)
4956 debug_printf("Recipients:\n");
4957 for (i = 0; i < recipients_count; i++)
4958 debug_printf(" %s\n", recipients_list[i].address);
4962 /* Run the acl_not_smtp_start ACL if required. The result of the ACL is
4963 ignored; rejecting here would just add complication, and it can just as
4964 well be done later. Allow $recipients to be visible in the ACL. */
4966 if (acl_not_smtp_start != NULL)
4968 uschar *user_msg, *log_msg;
4969 enable_dollar_recipients = TRUE;
4970 (void)acl_check(ACL_WHERE_NOTSMTP_START, NULL, acl_not_smtp_start,
4971 &user_msg, &log_msg);
4972 enable_dollar_recipients = FALSE;
4975 /* Read the data for the message. If filter_test is not FTEST_NONE, this
4976 will just read the headers for the message, and not write anything onto the
4979 message_ended = END_NOTENDED;
4980 more = receive_msg(extract_recipients);
4982 /* more is always FALSE here (not SMTP message) when reading a message
4983 for real; when reading the headers of a message for filter testing,
4984 it is TRUE if the headers were terminated by '.' and FALSE otherwise. */
4986 if (message_id[0] == 0) exim_exit(EXIT_FAILURE);
4987 } /* Non-SMTP message reception */
4989 /* If this is a filter testing run, there are headers in store, but
4990 no message on the spool. Run the filtering code in testing mode, setting
4991 the domain to the qualify domain and the local part to the current user,
4992 unless they have been set by options. The prefix and suffix are left unset
4993 unless specified. The the return path is set to to the sender unless it has
4994 already been set from a return-path header in the message. */
4996 if (filter_test != FTEST_NONE)
4998 deliver_domain = (ftest_domain != NULL)?
4999 ftest_domain : qualify_domain_recipient;
5000 deliver_domain_orig = deliver_domain;
5001 deliver_localpart = (ftest_localpart != NULL)?
5002 ftest_localpart : originator_login;
5003 deliver_localpart_orig = deliver_localpart;
5004 deliver_localpart_prefix = ftest_prefix;
5005 deliver_localpart_suffix = ftest_suffix;
5006 deliver_home = originator_home;
5008 if (return_path == NULL)
5010 printf("Return-path copied from sender\n");
5011 return_path = string_copy(sender_address);
5015 printf("Return-path = %s\n", (return_path[0] == 0)? US"<>" : return_path);
5017 printf("Sender = %s\n", (sender_address[0] == 0)? US"<>" : sender_address);
5019 receive_add_recipient(
5020 string_sprintf("%s%s%s@%s",
5021 (ftest_prefix == NULL)? US"" : ftest_prefix,
5023 (ftest_suffix == NULL)? US"" : ftest_suffix,
5024 deliver_domain), -1);
5026 printf("Recipient = %s\n", recipients_list[0].address);
5027 if (ftest_prefix != NULL) printf("Prefix = %s\n", ftest_prefix);
5028 if (ftest_suffix != NULL) printf("Suffix = %s\n", ftest_suffix);
5030 (void)chdir("/"); /* Get away from wherever the user is running this from */
5032 /* Now we run either a system filter test, or a user filter test, or both.
5033 In the latter case, headers added by the system filter will persist and be
5034 available to the user filter. We need to copy the filter variables
5037 if ((filter_test & FTEST_SYSTEM) != 0)
5039 if (!filter_runtest(filter_sfd, filter_test_sfile, TRUE, more))
5040 exim_exit(EXIT_FAILURE);
5043 memcpy(filter_sn, filter_n, sizeof(filter_sn));
5045 if ((filter_test & FTEST_USER) != 0)
5047 if (!filter_runtest(filter_ufd, filter_test_ufile, FALSE, more))
5048 exim_exit(EXIT_FAILURE);
5051 exim_exit(EXIT_SUCCESS);
5054 /* Else act on the result of message reception. We should not get here unless
5055 message_id[0] is non-zero. If queue_only is set, session_local_queue_only
5056 will be TRUE. If it is not, check on the number of messages received in this
5059 if (!session_local_queue_only &&
5060 smtp_accept_queue_per_connection > 0 &&
5061 receive_messagecount > smtp_accept_queue_per_connection)
5063 session_local_queue_only = TRUE;
5064 queue_only_reason = 2;
5067 /* Initialize local_queue_only from session_local_queue_only. If it is false,
5068 and queue_only_load is set, check that the load average is below it. If it is
5069 not, set local_queue_only TRUE. If queue_only_load_latch is true (the
5070 default), we put the whole session into queue_only mode. It then remains this
5071 way for any subsequent messages on the same SMTP connection. This is a
5072 deliberate choice; even though the load average may fall, it doesn't seem
5073 right to deliver later messages on the same call when not delivering earlier
5074 ones. However, there are odd cases where this is not wanted, so this can be
5075 changed by setting queue_only_load_latch false. */
5077 local_queue_only = session_local_queue_only;
5078 if (!local_queue_only && queue_only_load >= 0)
5080 local_queue_only = (load_average = OS_GETLOADAVG()) > queue_only_load;
5081 if (local_queue_only)
5083 queue_only_reason = 3;
5084 if (queue_only_load_latch) session_local_queue_only = TRUE;
5088 /* If running as an MUA wrapper, all queueing options and freezing options
5092 local_queue_only = queue_only_policy = deliver_freeze = FALSE;
5094 /* Log the queueing here, when it will get a message id attached, but
5095 not if queue_only is set (case 0). Case 1 doesn't happen here (too many
5098 if (local_queue_only) switch(queue_only_reason)
5101 log_write(L_delay_delivery,
5102 LOG_MAIN, "no immediate delivery: more than %d messages "
5103 "received in one connection", smtp_accept_queue_per_connection);
5107 log_write(L_delay_delivery,
5108 LOG_MAIN, "no immediate delivery: load average %.2f",
5109 (double)load_average/1000.0);
5113 /* Else do the delivery unless the ACL or local_scan() called for queue only
5114 or froze the message. Always deliver in a separate process. A fork failure is
5115 not a disaster, as the delivery will eventually happen on a subsequent queue
5116 run. The search cache must be tidied before the fork, as the parent will
5117 do it before exiting. The child will trigger a lookup failure and
5118 thereby defer the delivery if it tries to use (for example) a cached ldap
5119 connection that the parent has called unbind on. */
5121 else if (!queue_only_policy && !deliver_freeze)
5126 if ((pid = fork()) == 0)
5129 close_unwanted(); /* Close unwanted file descriptors and TLS */
5130 exim_nullstd(); /* Ensure std{in,out,err} exist */
5132 /* Re-exec Exim if we need to regain privilege (note: in mua_wrapper
5133 mode, deliver_drop_privilege is forced TRUE). */
5135 if (geteuid() != root_uid && !deliver_drop_privilege && !unprivileged)
5137 (void)child_exec_exim(CEE_EXEC_EXIT, FALSE, NULL, FALSE, 2, US"-Mc",
5139 /* Control does not return here. */
5142 /* No need to re-exec */
5144 rc = deliver_message(message_id, FALSE, FALSE);
5146 _exit((!mua_wrapper || rc == DELIVER_MUA_SUCCEEDED)?
5147 EXIT_SUCCESS : EXIT_FAILURE);
5152 log_write(0, LOG_MAIN|LOG_PANIC, "failed to fork automatic delivery "
5153 "process: %s", strerror(errno));
5156 /* In the parent, wait if synchronous delivery is required. This will
5157 always be the case in MUA wrapper mode. */
5159 else if (synchronous_delivery)
5162 while (wait(&status) != pid);
5163 if ((status & 0x00ff) != 0)
5164 log_write(0, LOG_MAIN|LOG_PANIC,
5165 "process %d crashed with signal %d while delivering %s",
5166 (int)pid, status & 0x00ff, message_id);
5167 if (mua_wrapper && (status & 0xffff) != 0) exim_exit(EXIT_FAILURE);
5171 /* The loop will repeat if more is TRUE. If we do not know know that the OS
5172 automatically reaps children (see comments above the loop), clear away any
5173 finished subprocesses here, in case there are lots of messages coming in
5174 from the same source. */
5176 #ifndef SIG_IGN_WORKS
5177 while (waitpid(-1, NULL, WNOHANG) > 0);
5181 exim_exit(EXIT_SUCCESS); /* Never returns */
5182 return 0; /* To stop compiler warning */