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 * Entry point and high-level code *
1136 *************************************************/
1138 /* Entry point for the Exim mailer. Analyse the arguments and arrange to take
1139 the appropriate action. All the necessary functions are present in the one
1140 binary. I originally thought one should split it up, but it turns out that so
1141 much of the apparatus is needed in each chunk that one might as well just have
1142 it all available all the time, which then makes the coding easier as well.
1145 argc count of entries in argv
1146 argv argument strings, with argv[0] being the program name
1148 Returns: EXIT_SUCCESS if terminated successfully
1149 EXIT_FAILURE otherwise, except when a message has been sent
1150 to the sender, and -oee was given
1154 main(int argc, char **cargv)
1156 uschar **argv = USS cargv;
1157 int arg_receive_timeout = -1;
1158 int arg_smtp_receive_timeout = -1;
1159 int arg_error_handling = error_handling;
1160 int filter_sfd = -1;
1161 int filter_ufd = -1;
1164 int list_queue_option = 0;
1166 int msg_action_arg = -1;
1167 int namelen = (argv[0] == NULL)? 0 : Ustrlen(argv[0]);
1168 int queue_only_reason = 0;
1170 int perl_start_option = 0;
1172 int recipients_arg = argc;
1173 int sender_address_domain = 0;
1174 int test_retry_arg = -1;
1175 int test_rewrite_arg = -1;
1176 BOOL arg_queue_only = FALSE;
1177 BOOL bi_option = FALSE;
1178 BOOL checking = FALSE;
1179 BOOL count_queue = FALSE;
1180 BOOL expansion_test = FALSE;
1181 BOOL extract_recipients = FALSE;
1182 BOOL forced_delivery = FALSE;
1183 BOOL f_end_dot = FALSE;
1184 BOOL deliver_give_up = FALSE;
1185 BOOL list_queue = FALSE;
1186 BOOL list_options = FALSE;
1187 BOOL local_queue_only;
1189 BOOL one_msg_action = FALSE;
1190 BOOL queue_only_set = FALSE;
1191 BOOL receiving_message = TRUE;
1192 BOOL sender_ident_set = FALSE;
1193 BOOL session_local_queue_only;
1195 BOOL removed_privilege = FALSE;
1196 BOOL usage_wanted = FALSE;
1197 BOOL verify_address_mode = FALSE;
1198 BOOL verify_as_sender = FALSE;
1199 BOOL version_printed = FALSE;
1200 uschar *alias_arg = NULL;
1201 uschar *called_as = US"";
1202 uschar *start_queue_run_id = NULL;
1203 uschar *stop_queue_run_id = NULL;
1204 uschar *expansion_test_message = NULL;
1205 uschar *ftest_domain = NULL;
1206 uschar *ftest_localpart = NULL;
1207 uschar *ftest_prefix = NULL;
1208 uschar *ftest_suffix = NULL;
1209 uschar *malware_test_file = NULL;
1210 uschar *real_sender_address;
1211 uschar *originator_home = US"/";
1215 struct stat statbuf;
1216 pid_t passed_qr_pid = (pid_t)0;
1217 int passed_qr_pipe = -1;
1218 gid_t group_list[NGROUPS_MAX];
1220 /* Possible options for -R and -S */
1222 static uschar *rsopts[] = { US"f", US"ff", US"r", US"rf", US"rff" };
1224 /* Need to define this in case we need to change the environment in order
1225 to get rid of a bogus time zone. We have to make it char rather than uschar
1226 because some OS define it in /usr/include/unistd.h. */
1228 extern char **environ;
1230 /* If the Exim user and/or group and/or the configuration file owner/group were
1231 defined by ref:name at build time, we must now find the actual uid/gid values.
1232 This is a feature to make the lives of binary distributors easier. */
1234 #ifdef EXIM_USERNAME
1235 if (route_finduser(US EXIM_USERNAME, &pw, &exim_uid))
1239 fprintf(stderr, "exim: refusing to run with uid 0 for \"%s\"\n",
1243 exim_gid = pw->pw_gid;
1247 fprintf(stderr, "exim: failed to find uid for user name \"%s\"\n",
1253 #ifdef EXIM_GROUPNAME
1254 if (!route_findgroup(US EXIM_GROUPNAME, &exim_gid))
1256 fprintf(stderr, "exim: failed to find gid for group name \"%s\"\n",
1262 #ifdef CONFIGURE_OWNERNAME
1263 if (!route_finduser(US CONFIGURE_OWNERNAME, NULL, &config_uid))
1265 fprintf(stderr, "exim: failed to find uid for user name \"%s\"\n",
1266 CONFIGURE_OWNERNAME);
1271 /* We default the system_filter_user to be the Exim run-time user, as a
1272 sane non-root value. */
1273 system_filter_uid = exim_uid;
1275 #ifdef CONFIGURE_GROUPNAME
1276 if (!route_findgroup(US CONFIGURE_GROUPNAME, &config_gid))
1278 fprintf(stderr, "exim: failed to find gid for group name \"%s\"\n",
1279 CONFIGURE_GROUPNAME);
1284 /* In the Cygwin environment, some initialization needs doing. It is fudged
1285 in by means of this macro. */
1291 /* Check a field which is patched when we are running Exim within its
1292 testing harness; do a fast initial check, and then the whole thing. */
1294 running_in_test_harness =
1295 *running_status == '<' && Ustrcmp(running_status, "<<<testing>>>") == 0;
1297 /* The C standard says that the equivalent of setlocale(LC_ALL, "C") is obeyed
1298 at the start of a program; however, it seems that some environments do not
1299 follow this. A "strange" locale can affect the formatting of timestamps, so we
1302 setlocale(LC_ALL, "C");
1304 /* Set up the default handler for timing using alarm(). */
1306 os_non_restarting_signal(SIGALRM, sigalrm_handler);
1308 /* Ensure we have a buffer for constructing log entries. Use malloc directly,
1309 because store_malloc writes a log entry on failure. */
1311 log_buffer = (uschar *)malloc(LOG_BUFFER_SIZE);
1312 if (log_buffer == NULL)
1314 fprintf(stderr, "exim: failed to get store for log buffer\n");
1318 /* Set log_stderr to stderr, provided that stderr exists. This gets reset to
1319 NULL when the daemon is run and the file is closed. We have to use this
1320 indirection, because some systems don't allow writing to the variable "stderr".
1323 if (fstat(fileno(stderr), &statbuf) >= 0) log_stderr = stderr;
1325 /* Arrange for the PCRE regex library to use our store functions. Note that
1326 the normal calls are actually macros that add additional arguments for
1327 debugging purposes so we have to assign specially constructed functions here.
1328 The default is to use store in the stacking pool, but this is overridden in the
1329 regex_must_compile() function. */
1331 pcre_malloc = function_store_get;
1332 pcre_free = function_dummy_free;
1334 /* Ensure there is a big buffer for temporary use in several places. It is put
1335 in malloc store so that it can be freed for enlargement if necessary. */
1337 big_buffer = store_malloc(big_buffer_size);
1339 /* Set up the handler for the data request signal, and set the initial
1340 descriptive text. */
1342 set_process_info("initializing");
1343 os_restarting_signal(SIGUSR1, usr1_handler);
1345 /* SIGHUP is used to get the daemon to reconfigure. It gets set as appropriate
1346 in the daemon code. For the rest of Exim's uses, we ignore it. */
1348 signal(SIGHUP, SIG_IGN);
1350 /* We don't want to die on pipe errors as the code is written to handle
1351 the write error instead. */
1353 signal(SIGPIPE, SIG_IGN);
1355 /* Under some circumstance on some OS, Exim can get called with SIGCHLD
1356 set to SIG_IGN. This causes subprocesses that complete before the parent
1357 process waits for them not to hang around, so when Exim calls wait(), nothing
1358 is there. The wait() code has been made robust against this, but let's ensure
1359 that SIGCHLD is set to SIG_DFL, because it's tidier to wait and get a process
1360 ending status. We use sigaction rather than plain signal() on those OS where
1361 SA_NOCLDWAIT exists, because we want to be sure it is turned off. (There was a
1362 problem on AIX with this.) */
1366 struct sigaction act;
1367 act.sa_handler = SIG_DFL;
1368 sigemptyset(&(act.sa_mask));
1370 sigaction(SIGCHLD, &act, NULL);
1373 signal(SIGCHLD, SIG_DFL);
1376 /* Save the arguments for use if we re-exec exim as a daemon after receiving
1381 /* Set up the version number. Set up the leading 'E' for the external form of
1382 message ids, set the pointer to the internal form, and initialize it to
1383 indicate no message being processed. */
1386 message_id_option[0] = '-';
1387 message_id_external = message_id_option + 1;
1388 message_id_external[0] = 'E';
1389 message_id = message_id_external + 1;
1392 /* Set the umask to zero so that any files Exim creates using open() are
1393 created with the modes that it specifies. NOTE: Files created with fopen() have
1394 a problem, which was not recognized till rather late (February 2006). With this
1395 umask, such files will be world writeable. (They are all content scanning files
1396 in the spool directory, which isn't world-accessible, so this is not a
1397 disaster, but it's untidy.) I don't want to change this overall setting,
1398 however, because it will interact badly with the open() calls. Instead, there's
1399 now a function called modefopen() that fiddles with the umask while calling
1404 /* Precompile the regular expression for matching a message id. Keep this in
1405 step with the code that generates ids in the accept.c module. We need to do
1406 this here, because the -M options check their arguments for syntactic validity
1407 using mac_ismsgid, which uses this. */
1410 regex_must_compile(US"^(?:[^\\W_]{6}-){2}[^\\W_]{2}$", FALSE, TRUE);
1412 /* Precompile the regular expression that is used for matching an SMTP error
1413 code, possibly extended, at the start of an error message. Note that the
1414 terminating whitespace character is included. */
1417 regex_must_compile(US"^\\d\\d\\d\\s(?:\\d\\.\\d\\d?\\d?\\.\\d\\d?\\d?\\s)?",
1420 /* If the program is called as "mailq" treat it as equivalent to "exim -bp";
1421 this seems to be a generally accepted convention, since one finds symbolic
1422 links called "mailq" in standard OS configurations. */
1424 if ((namelen == 5 && Ustrcmp(argv[0], "mailq") == 0) ||
1425 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/mailq", 6) == 0))
1428 receiving_message = FALSE;
1429 called_as = US"-mailq";
1432 /* If the program is called as "rmail" treat it as equivalent to
1433 "exim -i -oee", thus allowing UUCP messages to be input using non-SMTP mode,
1434 i.e. preventing a single dot on a line from terminating the message, and
1435 returning with zero return code, even in cases of error (provided an error
1436 message has been sent). */
1438 if ((namelen == 5 && Ustrcmp(argv[0], "rmail") == 0) ||
1439 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/rmail", 6) == 0))
1442 called_as = US"-rmail";
1443 errors_sender_rc = EXIT_SUCCESS;
1446 /* If the program is called as "rsmtp" treat it as equivalent to "exim -bS";
1447 this is a smail convention. */
1449 if ((namelen == 5 && Ustrcmp(argv[0], "rsmtp") == 0) ||
1450 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/rsmtp", 6) == 0))
1452 smtp_input = smtp_batched_input = TRUE;
1453 called_as = US"-rsmtp";
1456 /* If the program is called as "runq" treat it as equivalent to "exim -q";
1457 this is a smail convention. */
1459 if ((namelen == 4 && Ustrcmp(argv[0], "runq") == 0) ||
1460 (namelen > 4 && Ustrncmp(argv[0] + namelen - 5, "/runq", 5) == 0))
1463 receiving_message = FALSE;
1464 called_as = US"-runq";
1467 /* If the program is called as "newaliases" treat it as equivalent to
1468 "exim -bi"; this is a sendmail convention. */
1470 if ((namelen == 10 && Ustrcmp(argv[0], "newaliases") == 0) ||
1471 (namelen > 10 && Ustrncmp(argv[0] + namelen - 11, "/newaliases", 11) == 0))
1474 receiving_message = FALSE;
1475 called_as = US"-newaliases";
1478 /* Save the original effective uid for a couple of uses later. It should
1479 normally be root, but in some esoteric environments it may not be. */
1481 original_euid = geteuid();
1483 /* Get the real uid and gid. If the caller is root, force the effective uid/gid
1484 to be the same as the real ones. This makes a difference only if Exim is setuid
1485 (or setgid) to something other than root, which could be the case in some
1486 special configurations. */
1488 real_uid = getuid();
1489 real_gid = getgid();
1491 if (real_uid == root_uid)
1497 /* If neither the original real uid nor the original euid was root, Exim is
1498 running in an unprivileged state. */
1500 unprivileged = (real_uid != root_uid && original_euid != root_uid);
1502 /* Scan the program's arguments. Some can be dealt with right away; others are
1503 simply recorded for checking and handling afterwards. Do a high-level switch
1504 on the second character (the one after '-'), to save some effort. */
1506 for (i = 1; i < argc; i++)
1508 BOOL badarg = FALSE;
1509 uschar *arg = argv[i];
1513 /* An argument not starting with '-' is the start of a recipients list;
1514 break out of the options-scanning loop. */
1522 /* An option consistion of -- terminates the options */
1524 if (Ustrcmp(arg, "--") == 0)
1526 recipients_arg = i + 1;
1530 /* Handle flagged options */
1532 switchchar = arg[1];
1535 /* Make all -ex options synonymous with -oex arguments, since that
1536 is assumed by various callers. Also make -qR options synonymous with -R
1537 options, as that seems to be required as well. Allow for -qqR too, and
1538 the same for -S options. */
1540 if (Ustrncmp(arg+1, "oe", 2) == 0 ||
1541 Ustrncmp(arg+1, "qR", 2) == 0 ||
1542 Ustrncmp(arg+1, "qS", 2) == 0)
1544 switchchar = arg[2];
1547 else if (Ustrncmp(arg+1, "qqR", 3) == 0 || Ustrncmp(arg+1, "qqS", 3) == 0)
1549 switchchar = arg[3];
1551 queue_2stage = TRUE;
1554 /* Make -r synonymous with -f, since it is a documented alias */
1556 else if (arg[1] == 'r') switchchar = 'f';
1558 /* Make -ov synonymous with -v */
1560 else if (Ustrcmp(arg, "-ov") == 0)
1566 /* deal with --option_aliases */
1567 else if (switchchar == '-')
1569 if (Ustrcmp(argrest, "help") == 0)
1571 usage_wanted = TRUE;
1574 else if (Ustrcmp(argrest, "version") == 0)
1581 /* High-level switch on active initial letter */
1585 /* -Btype is a sendmail option for 7bit/8bit setting. Exim is 8-bit clean
1586 so has no need of it. */
1589 if (*argrest == 0) i++; /* Skip over the type */
1594 receiving_message = FALSE; /* Reset TRUE for -bm, -bS, -bs below */
1596 /* -bd: Run in daemon mode, awaiting SMTP connections.
1597 -bdf: Ditto, but in the foreground.
1600 if (*argrest == 'd')
1602 daemon_listen = TRUE;
1603 if (*(++argrest) == 'f') background_daemon = FALSE;
1604 else if (*argrest != 0) { badarg = TRUE; break; }
1607 /* -be: Run in expansion test mode
1608 -bem: Ditto, but read a message from a file first
1611 else if (*argrest == 'e')
1613 expansion_test = checking = TRUE;
1614 if (argrest[1] == 'm')
1616 if (++i >= argc) { badarg = TRUE; break; }
1617 expansion_test_message = argv[i];
1620 if (argrest[1] != 0) { badarg = TRUE; break; }
1623 /* -bF: Run system filter test */
1625 else if (*argrest == 'F')
1627 filter_test |= FTEST_SYSTEM;
1628 if (*(++argrest) != 0) { badarg = TRUE; break; }
1629 if (++i < argc) filter_test_sfile = argv[i]; else
1631 fprintf(stderr, "exim: file name expected after %s\n", argv[i-1]);
1636 /* -bf: Run user filter test
1637 -bfd: Set domain for filter testing
1638 -bfl: Set local part for filter testing
1639 -bfp: Set prefix for filter testing
1640 -bfs: Set suffix for filter testing
1643 else if (*argrest == 'f')
1645 if (*(++argrest) == 0)
1647 filter_test |= FTEST_USER;
1648 if (++i < argc) filter_test_ufile = argv[i]; else
1650 fprintf(stderr, "exim: file name expected after %s\n", argv[i-1]);
1658 fprintf(stderr, "exim: string expected after %s\n", arg);
1661 if (Ustrcmp(argrest, "d") == 0) ftest_domain = argv[i];
1662 else if (Ustrcmp(argrest, "l") == 0) ftest_localpart = argv[i];
1663 else if (Ustrcmp(argrest, "p") == 0) ftest_prefix = argv[i];
1664 else if (Ustrcmp(argrest, "s") == 0) ftest_suffix = argv[i];
1665 else { badarg = TRUE; break; }
1669 /* -bh: Host checking - an IP address must follow. */
1671 else if (Ustrcmp(argrest, "h") == 0 || Ustrcmp(argrest, "hc") == 0)
1673 if (++i >= argc) { badarg = TRUE; break; }
1674 sender_host_address = argv[i];
1675 host_checking = checking = log_testing_mode = TRUE;
1676 host_checking_callout = argrest[1] == 'c';
1679 /* -bi: This option is used by sendmail to initialize *the* alias file,
1680 though it has the -oA option to specify a different file. Exim has no
1681 concept of *the* alias file, but since Sun's YP make script calls
1682 sendmail this way, some support must be provided. */
1684 else if (Ustrcmp(argrest, "i") == 0) bi_option = TRUE;
1686 /* -bm: Accept and deliver message - the default option. Reinstate
1687 receiving_message, which got turned off for all -b options. */
1689 else if (Ustrcmp(argrest, "m") == 0) receiving_message = TRUE;
1691 /* -bmalware: test the filename given for malware */
1693 else if (Ustrcmp(argrest, "malware") == 0)
1695 if (++i >= argc) { badarg = TRUE; break; }
1696 malware_test_file = argv[i];
1699 /* -bnq: For locally originating messages, do not qualify unqualified
1700 addresses. In the envelope, this causes errors; in header lines they
1703 else if (Ustrcmp(argrest, "nq") == 0)
1705 allow_unqualified_sender = FALSE;
1706 allow_unqualified_recipient = FALSE;
1709 /* -bpxx: List the contents of the mail queue, in various forms. If
1710 the option is -bpc, just a queue count is needed. Otherwise, if the
1711 first letter after p is r, then order is random. */
1713 else if (*argrest == 'p')
1715 if (*(++argrest) == 'c')
1718 if (*(++argrest) != 0) badarg = TRUE;
1722 if (*argrest == 'r')
1724 list_queue_option = 8;
1727 else list_queue_option = 0;
1731 /* -bp: List the contents of the mail queue, top-level only */
1733 if (*argrest == 0) {}
1735 /* -bpu: List the contents of the mail queue, top-level undelivered */
1737 else if (Ustrcmp(argrest, "u") == 0) list_queue_option += 1;
1739 /* -bpa: List the contents of the mail queue, including all delivered */
1741 else if (Ustrcmp(argrest, "a") == 0) list_queue_option += 2;
1743 /* Unknown after -bp[r] */
1753 /* -bP: List the configuration variables given as the address list.
1754 Force -v, so configuration errors get displayed. */
1756 else if (Ustrcmp(argrest, "P") == 0)
1758 list_options = TRUE;
1759 debug_selector |= D_v;
1760 debug_file = stderr;
1763 /* -brt: Test retry configuration lookup */
1765 else if (Ustrcmp(argrest, "rt") == 0)
1767 test_retry_arg = i + 1;
1771 /* -brw: Test rewrite configuration */
1773 else if (Ustrcmp(argrest, "rw") == 0)
1775 test_rewrite_arg = i + 1;
1779 /* -bS: Read SMTP commands on standard input, but produce no replies -
1780 all errors are reported by sending messages. */
1782 else if (Ustrcmp(argrest, "S") == 0)
1783 smtp_input = smtp_batched_input = receiving_message = TRUE;
1785 /* -bs: Read SMTP commands on standard input and produce SMTP replies
1786 on standard output. */
1788 else if (Ustrcmp(argrest, "s") == 0) smtp_input = receiving_message = TRUE;
1790 /* -bt: address testing mode */
1792 else if (Ustrcmp(argrest, "t") == 0)
1793 address_test_mode = checking = log_testing_mode = TRUE;
1795 /* -bv: verify addresses */
1797 else if (Ustrcmp(argrest, "v") == 0)
1798 verify_address_mode = checking = log_testing_mode = TRUE;
1800 /* -bvs: verify sender addresses */
1802 else if (Ustrcmp(argrest, "vs") == 0)
1804 verify_address_mode = checking = log_testing_mode = TRUE;
1805 verify_as_sender = TRUE;
1808 /* -bV: Print version string and support details */
1810 else if (Ustrcmp(argrest, "V") == 0)
1812 printf("Exim version %s #%s built %s\n", version_string,
1813 version_cnumber, version_date);
1814 printf("%s\n", CS version_copyright);
1815 version_printed = TRUE;
1816 show_whats_supported(stdout);
1823 /* -C: change configuration file list; ignore if it isn't really
1824 a change! Enforce a prefix check if required. */
1829 if(++i < argc) argrest = argv[i]; else
1830 { badarg = TRUE; break; }
1832 if (Ustrcmp(config_main_filelist, argrest) != 0)
1834 #ifdef ALT_CONFIG_PREFIX
1836 int len = Ustrlen(ALT_CONFIG_PREFIX);
1837 uschar *list = argrest;
1839 while((filename = string_nextinlist(&list, &sep, big_buffer,
1840 big_buffer_size)) != NULL)
1842 if ((Ustrlen(filename) < len ||
1843 Ustrncmp(filename, ALT_CONFIG_PREFIX, len) != 0 ||
1844 Ustrstr(filename, "/../") != NULL) &&
1845 (Ustrcmp(filename, "/dev/null") != 0 || real_uid != root_uid))
1847 fprintf(stderr, "-C Permission denied\n");
1852 if (real_uid != root_uid)
1854 #ifdef TRUSTED_CONFIG_PREFIX_LIST
1856 if (Ustrstr(argrest, "/../"))
1857 trusted_config = FALSE;
1860 FILE *trust_list = Ufopen(TRUSTED_CONFIG_PREFIX_LIST, "rb");
1863 struct stat statbuf;
1865 if (fstat(fileno(trust_list), &statbuf) != 0 ||
1866 (statbuf.st_uid != root_uid /* owner not root */
1867 #ifdef CONFIGURE_OWNER
1868 && statbuf.st_uid != config_uid /* owner not the special one */
1871 (statbuf.st_gid != root_gid /* group not root */
1872 #ifdef CONFIGURE_GROUP
1873 && statbuf.st_gid != config_gid /* group not the special one */
1875 && (statbuf.st_mode & 020) != 0 /* group writeable */
1877 (statbuf.st_mode & 2) != 0) /* world writeable */
1879 trusted_config = FALSE;
1884 /* Well, the trust list at least is up to scratch... */
1885 void *reset_point = store_get(0);
1886 uschar *trusted_prefixes[32];
1887 int nr_prefixes = 0;
1890 while (Ufgets(big_buffer, big_buffer_size, trust_list))
1892 uschar *start = big_buffer, *nl;
1893 while (*start && isspace(*start))
1897 nl = Ustrchr(start, '\n');
1900 trusted_prefixes[nr_prefixes++] = string_copy(start);
1901 if (nr_prefixes == 32)
1909 uschar *list = argrest;
1911 while (trusted_config && (filename = string_nextinlist(&list,
1912 &sep, big_buffer, big_buffer_size)) != NULL)
1914 for (i=0; i < nr_prefixes; i++)
1916 int len = Ustrlen(trusted_prefixes[i]);
1917 if (Ustrlen(filename) >= len &&
1918 Ustrncmp(filename, trusted_prefixes[i], len) == 0)
1921 if (i == nr_prefixes)
1923 trusted_config = FALSE;
1927 store_reset(reset_point);
1931 /* No valid prefixes found in trust_list file. */
1932 trusted_config = FALSE;
1938 /* Could not open trust_list file. */
1939 trusted_config = FALSE;
1943 /* Not root; don't trust config */
1944 trusted_config = FALSE;
1948 config_main_filelist = argrest;
1949 config_changed = TRUE;
1954 /* -D: set up a macro definition */
1957 #ifdef DISABLE_D_OPTION
1958 fprintf(stderr, "exim: -D is not available in this Exim binary\n");
1963 macro_item *mlast = NULL;
1966 uschar *s = argrest;
1968 while (isspace(*s)) s++;
1970 if (*s < 'A' || *s > 'Z')
1972 fprintf(stderr, "exim: macro name set by -D must start with "
1973 "an upper case letter\n");
1977 while (isalnum(*s) || *s == '_')
1979 if (ptr < sizeof(name)-1) name[ptr++] = *s;
1983 if (ptr == 0) { badarg = TRUE; break; }
1984 while (isspace(*s)) s++;
1987 if (*s++ != '=') { badarg = TRUE; break; }
1988 while (isspace(*s)) s++;
1991 for (m = macros; m != NULL; m = m->next)
1993 if (Ustrcmp(m->name, name) == 0)
1995 fprintf(stderr, "exim: duplicated -D in command line\n");
2001 m = store_get(sizeof(macro_item) + Ustrlen(name));
2003 m->command_line = TRUE;
2004 if (mlast == NULL) macros = m; else mlast->next = m;
2005 Ustrcpy(m->name, name);
2006 m->replacement = string_copy(s);
2008 if (clmacro_count >= MAX_CLMACROS)
2010 fprintf(stderr, "exim: too many -D options on command line\n");
2013 clmacros[clmacro_count++] = string_sprintf("-D%s=%s", m->name,
2019 /* -d: Set debug level (see also -v below) or set the drop_cr option.
2020 The latter is now a no-op, retained for compatibility only. If -dd is used,
2021 debugging subprocesses of the daemon is disabled. */
2024 if (Ustrcmp(argrest, "ropcr") == 0)
2026 /* drop_cr = TRUE; */
2029 /* Use an intermediate variable so that we don't set debugging while
2030 decoding the debugging bits. */
2034 unsigned int selector = D_default;
2037 if (*argrest == 'd')
2039 debug_daemon = TRUE;
2043 decode_bits(&selector, NULL, D_memory, 0, argrest, debug_options,
2044 debug_options_count, US"debug", 0);
2045 debug_selector = selector;
2050 /* -E: This is a local error message. This option is not intended for
2051 external use at all, but is not restricted to trusted callers because it
2052 does no harm (just suppresses certain error messages) and if Exim is run
2053 not setuid root it won't always be trusted when it generates error
2054 messages using this option. If there is a message id following -E, point
2055 message_reference at it, for logging. */
2058 local_error_message = TRUE;
2059 if (mac_ismsgid(argrest)) message_reference = argrest;
2063 /* -ex: The vacation program calls sendmail with the undocumented "-eq"
2064 option, so it looks as if historically the -oex options are also callable
2065 without the leading -o. So we have to accept them. Before the switch,
2066 anything starting -oe has been converted to -e. Exim does not support all
2067 of the sendmail error options. */
2070 if (Ustrcmp(argrest, "e") == 0)
2072 arg_error_handling = ERRORS_SENDER;
2073 errors_sender_rc = EXIT_SUCCESS;
2075 else if (Ustrcmp(argrest, "m") == 0) arg_error_handling = ERRORS_SENDER;
2076 else if (Ustrcmp(argrest, "p") == 0) arg_error_handling = ERRORS_STDERR;
2077 else if (Ustrcmp(argrest, "q") == 0) arg_error_handling = ERRORS_STDERR;
2078 else if (Ustrcmp(argrest, "w") == 0) arg_error_handling = ERRORS_SENDER;
2083 /* -F: Set sender's full name, used instead of the gecos entry from
2084 the password file. Since users can usually alter their gecos entries,
2085 there's no security involved in using this instead. The data can follow
2086 the -F or be in the next argument. */
2091 if(++i < argc) argrest = argv[i]; else
2092 { badarg = TRUE; break; }
2094 originator_name = argrest;
2095 sender_name_forced = TRUE;
2099 /* -f: Set sender's address - this value is only actually used if Exim is
2100 run by a trusted user, or if untrusted_set_sender is set and matches the
2101 address, except that the null address can always be set by any user. The
2102 test for this happens later, when the value given here is ignored when not
2103 permitted. For an untrusted user, the actual sender is still put in Sender:
2104 if it doesn't match the From: header (unless no_local_from_check is set).
2105 The data can follow the -f or be in the next argument. The -r switch is an
2106 obsolete form of -f but since there appear to be programs out there that
2107 use anything that sendmail has ever supported, better accept it - the
2108 synonymizing is done before the switch above.
2110 At this stage, we must allow domain literal addresses, because we don't
2111 know what the setting of allow_domain_literals is yet. Ditto for trailing
2112 dots and strip_trailing_dot. */
2120 if (i+1 < argc) argrest = argv[++i]; else
2121 { badarg = TRUE; break; }
2125 sender_address = string_sprintf(""); /* Ensure writeable memory */
2129 uschar *temp = argrest + Ustrlen(argrest) - 1;
2130 while (temp >= argrest && isspace(*temp)) temp--;
2131 if (temp >= argrest && *temp == '.') f_end_dot = TRUE;
2132 allow_domain_literals = TRUE;
2133 strip_trailing_dot = TRUE;
2134 sender_address = parse_extract_address(argrest, &errmess, &start, &end,
2135 &sender_address_domain, TRUE);
2136 allow_domain_literals = FALSE;
2137 strip_trailing_dot = FALSE;
2138 if (sender_address == NULL)
2140 fprintf(stderr, "exim: bad -f address \"%s\": %s\n", argrest, errmess);
2141 return EXIT_FAILURE;
2144 sender_address_forced = TRUE;
2148 /* This is some Sendmail thing which can be ignored */
2153 /* -h: Set the hop count for an incoming message. Exim does not currently
2154 support this; it always computes it by counting the Received: headers.
2155 To put it in will require a change to the spool header file format. */
2160 if(++i < argc) argrest = argv[i]; else
2161 { badarg = TRUE; break; }
2163 if (!isdigit(*argrest)) badarg = TRUE;
2167 /* -i: Set flag so dot doesn't end non-SMTP input (same as -oi, seems
2168 not to be documented for sendmail but mailx (at least) uses it) */
2171 if (*argrest == 0) dot_ends = FALSE; else badarg = TRUE;
2176 receiving_message = FALSE;
2178 /* -MC: continue delivery of another message via an existing open
2179 file descriptor. This option is used for an internal call by the
2180 smtp transport when there is a pending message waiting to go to an
2181 address to which it has got a connection. Five subsequent arguments are
2182 required: transport name, host name, IP address, sequence number, and
2183 message_id. Transports may decline to create new processes if the sequence
2184 number gets too big. The channel is stdin. This (-MC) must be the last
2185 argument. There's a subsequent check that the real-uid is privileged.
2187 If we are running in the test harness. delay for a bit, to let the process
2188 that set this one up complete. This makes for repeatability of the logging,
2191 if (Ustrcmp(argrest, "C") == 0)
2193 union sockaddr_46 interface_sock;
2194 EXIM_SOCKLEN_T size = sizeof(interface_sock);
2198 fprintf(stderr, "exim: too many or too few arguments after -MC\n");
2199 return EXIT_FAILURE;
2202 if (msg_action_arg >= 0)
2204 fprintf(stderr, "exim: incompatible arguments\n");
2205 return EXIT_FAILURE;
2208 continue_transport = argv[++i];
2209 continue_hostname = argv[++i];
2210 continue_host_address = argv[++i];
2211 continue_sequence = Uatoi(argv[++i]);
2212 msg_action = MSG_DELIVER;
2213 msg_action_arg = ++i;
2214 forced_delivery = TRUE;
2215 queue_run_pid = passed_qr_pid;
2216 queue_run_pipe = passed_qr_pipe;
2218 if (!mac_ismsgid(argv[i]))
2220 fprintf(stderr, "exim: malformed message id %s after -MC option\n",
2222 return EXIT_FAILURE;
2225 /* Set up $sending_ip_address and $sending_port */
2227 if (getsockname(fileno(stdin), (struct sockaddr *)(&interface_sock),
2229 sending_ip_address = host_ntoa(-1, &interface_sock, NULL,
2233 fprintf(stderr, "exim: getsockname() failed after -MC option: %s\n",
2235 return EXIT_FAILURE;
2238 if (running_in_test_harness) millisleep(500);
2242 /* -MCA: set the smtp_authenticated flag; this is useful only when it
2243 precedes -MC (see above). The flag indicates that the host to which
2244 Exim is connected has accepted an AUTH sequence. */
2246 else if (Ustrcmp(argrest, "CA") == 0)
2248 smtp_authenticated = TRUE;
2252 /* -MCP: set the smtp_use_pipelining flag; this is useful only when
2253 it preceded -MC (see above) */
2255 else if (Ustrcmp(argrest, "CP") == 0)
2257 smtp_use_pipelining = TRUE;
2261 /* -MCQ: pass on the pid of the queue-running process that started
2262 this chain of deliveries and the fd of its synchronizing pipe; this
2263 is useful only when it precedes -MC (see above) */
2265 else if (Ustrcmp(argrest, "CQ") == 0)
2267 if(++i < argc) passed_qr_pid = (pid_t)(Uatol(argv[i]));
2269 if(++i < argc) passed_qr_pipe = (int)(Uatol(argv[i]));
2274 /* -MCS: set the smtp_use_size flag; this is useful only when it
2275 precedes -MC (see above) */
2277 else if (Ustrcmp(argrest, "CS") == 0)
2279 smtp_use_size = TRUE;
2283 /* -MCT: set the tls_offered flag; this is useful only when it
2284 precedes -MC (see above). The flag indicates that the host to which
2285 Exim is connected has offered TLS support. */
2288 else if (Ustrcmp(argrest, "CT") == 0)
2295 /* -M[x]: various operations on the following list of message ids:
2296 -M deliver the messages, ignoring next retry times and thawing
2297 -Mc deliver the messages, checking next retry times, no thawing
2298 -Mf freeze the messages
2299 -Mg give up on the messages
2300 -Mt thaw the messages
2301 -Mrm remove the messages
2302 In the above cases, this must be the last option. There are also the
2303 following options which are followed by a single message id, and which
2304 act on that message. Some of them use the "recipient" addresses as well.
2305 -Mar add recipient(s)
2306 -Mmad mark all recipients delivered
2307 -Mmd mark recipients(s) delivered
2309 -Mset load a message for use with -be
2311 -Mvc show copy (of whole message, in RFC 2822 format)
2316 else if (*argrest == 0)
2318 msg_action = MSG_DELIVER;
2319 forced_delivery = deliver_force_thaw = TRUE;
2321 else if (Ustrcmp(argrest, "ar") == 0)
2323 msg_action = MSG_ADD_RECIPIENT;
2324 one_msg_action = TRUE;
2326 else if (Ustrcmp(argrest, "c") == 0) msg_action = MSG_DELIVER;
2327 else if (Ustrcmp(argrest, "es") == 0)
2329 msg_action = MSG_EDIT_SENDER;
2330 one_msg_action = TRUE;
2332 else if (Ustrcmp(argrest, "f") == 0) msg_action = MSG_FREEZE;
2333 else if (Ustrcmp(argrest, "g") == 0)
2335 msg_action = MSG_DELIVER;
2336 deliver_give_up = TRUE;
2338 else if (Ustrcmp(argrest, "mad") == 0)
2340 msg_action = MSG_MARK_ALL_DELIVERED;
2342 else if (Ustrcmp(argrest, "md") == 0)
2344 msg_action = MSG_MARK_DELIVERED;
2345 one_msg_action = TRUE;
2347 else if (Ustrcmp(argrest, "rm") == 0) msg_action = MSG_REMOVE;
2348 else if (Ustrcmp(argrest, "set") == 0)
2350 msg_action = MSG_LOAD;
2351 one_msg_action = TRUE;
2353 else if (Ustrcmp(argrest, "t") == 0) msg_action = MSG_THAW;
2354 else if (Ustrcmp(argrest, "vb") == 0)
2356 msg_action = MSG_SHOW_BODY;
2357 one_msg_action = TRUE;
2359 else if (Ustrcmp(argrest, "vc") == 0)
2361 msg_action = MSG_SHOW_COPY;
2362 one_msg_action = TRUE;
2364 else if (Ustrcmp(argrest, "vh") == 0)
2366 msg_action = MSG_SHOW_HEADER;
2367 one_msg_action = TRUE;
2369 else if (Ustrcmp(argrest, "vl") == 0)
2371 msg_action = MSG_SHOW_LOG;
2372 one_msg_action = TRUE;
2374 else { badarg = TRUE; break; }
2376 /* All the -Mxx options require at least one message id. */
2378 msg_action_arg = i + 1;
2379 if (msg_action_arg >= argc)
2381 fprintf(stderr, "exim: no message ids given after %s option\n", arg);
2382 return EXIT_FAILURE;
2385 /* Some require only message ids to follow */
2387 if (!one_msg_action)
2390 for (j = msg_action_arg; j < argc; j++) if (!mac_ismsgid(argv[j]))
2392 fprintf(stderr, "exim: malformed message id %s after %s option\n",
2394 return EXIT_FAILURE;
2396 goto END_ARG; /* Remaining args are ids */
2399 /* Others require only one message id, possibly followed by addresses,
2400 which will be handled as normal arguments. */
2404 if (!mac_ismsgid(argv[msg_action_arg]))
2406 fprintf(stderr, "exim: malformed message id %s after %s option\n",
2407 argv[msg_action_arg], arg);
2408 return EXIT_FAILURE;
2415 /* Some programs seem to call the -om option without the leading o;
2416 for sendmail it askes for "me too". Exim always does this. */
2419 if (*argrest != 0) badarg = TRUE;
2423 /* -N: don't do delivery - a debugging option that stops transports doing
2424 their thing. It implies debugging at the D_v level. */
2429 dont_deliver = TRUE;
2430 debug_selector |= D_v;
2431 debug_file = stderr;
2437 /* -n: This means "don't alias" in sendmail, apparently. Just ignore
2443 /* -O: Just ignore it. In sendmail, apparently -O option=value means set
2444 option to the specified value. This form uses long names. We need to handle
2445 -O option=value and -Ooption=value. */
2452 fprintf(stderr, "exim: string expected after -O\n");
2460 /* -oA: Set an argument for the bi command (sendmail's "alternate alias
2463 if (*argrest == 'A')
2465 alias_arg = argrest + 1;
2466 if (alias_arg[0] == 0)
2468 if (i+1 < argc) alias_arg = argv[++i]; else
2470 fprintf(stderr, "exim: string expected after -oA\n");
2476 /* -oB: Set a connection message max value for remote deliveries */
2478 else if (*argrest == 'B')
2480 uschar *p = argrest + 1;
2483 if (i+1 < argc && isdigit((argv[i+1][0]))) p = argv[++i]; else
2485 connection_max_messages = 1;
2494 fprintf(stderr, "exim: number expected after -oB\n");
2497 connection_max_messages = Uatoi(p);
2501 /* -odb: background delivery */
2503 else if (Ustrcmp(argrest, "db") == 0)
2505 synchronous_delivery = FALSE;
2506 arg_queue_only = FALSE;
2507 queue_only_set = TRUE;
2510 /* -odf: foreground delivery (smail-compatible option); same effect as
2511 -odi: interactive (synchronous) delivery (sendmail-compatible option)
2514 else if (Ustrcmp(argrest, "df") == 0 || Ustrcmp(argrest, "di") == 0)
2516 synchronous_delivery = TRUE;
2517 arg_queue_only = FALSE;
2518 queue_only_set = TRUE;
2521 /* -odq: queue only */
2523 else if (Ustrcmp(argrest, "dq") == 0)
2525 synchronous_delivery = FALSE;
2526 arg_queue_only = TRUE;
2527 queue_only_set = TRUE;
2530 /* -odqs: queue SMTP only - do local deliveries and remote routing,
2531 but no remote delivery */
2533 else if (Ustrcmp(argrest, "dqs") == 0)
2536 arg_queue_only = FALSE;
2537 queue_only_set = TRUE;
2540 /* -oex: Sendmail error flags. As these are also accepted without the
2541 leading -o prefix, for compatibility with vacation and other callers,
2542 they are handled with -e above. */
2544 /* -oi: Set flag so dot doesn't end non-SMTP input (same as -i)
2545 -oitrue: Another sendmail syntax for the same */
2547 else if (Ustrcmp(argrest, "i") == 0 ||
2548 Ustrcmp(argrest, "itrue") == 0)
2551 /* -oM*: Set various characteristics for an incoming message; actually
2552 acted on for trusted callers only. */
2554 else if (*argrest == 'M')
2558 fprintf(stderr, "exim: data expected after -o%s\n", argrest);
2562 /* -oMa: Set sender host address */
2564 if (Ustrcmp(argrest, "Ma") == 0) sender_host_address = argv[++i];
2566 /* -oMaa: Set authenticator name */
2568 else if (Ustrcmp(argrest, "Maa") == 0)
2569 sender_host_authenticated = argv[++i];
2571 /* -oMas: setting authenticated sender */
2573 else if (Ustrcmp(argrest, "Mas") == 0) authenticated_sender = argv[++i];
2575 /* -oMai: setting authenticated id */
2577 else if (Ustrcmp(argrest, "Mai") == 0) authenticated_id = argv[++i];
2579 /* -oMi: Set incoming interface address */
2581 else if (Ustrcmp(argrest, "Mi") == 0) interface_address = argv[++i];
2583 /* -oMr: Received protocol */
2585 else if (Ustrcmp(argrest, "Mr") == 0) received_protocol = argv[++i];
2587 /* -oMs: Set sender host name */
2589 else if (Ustrcmp(argrest, "Ms") == 0) sender_host_name = argv[++i];
2591 /* -oMt: Set sender ident */
2593 else if (Ustrcmp(argrest, "Mt") == 0)
2595 sender_ident_set = TRUE;
2596 sender_ident = argv[++i];
2599 /* Else a bad argument */
2608 /* -om: Me-too flag for aliases. Exim always does this. Some programs
2609 seem to call this as -m (undocumented), so that is also accepted (see
2612 else if (Ustrcmp(argrest, "m") == 0) {}
2614 /* -oo: An ancient flag for old-style addresses which still seems to
2615 crop up in some calls (see in SCO). */
2617 else if (Ustrcmp(argrest, "o") == 0) {}
2619 /* -oP <name>: set pid file path for daemon */
2621 else if (Ustrcmp(argrest, "P") == 0)
2622 override_pid_file_path = argv[++i];
2624 /* -or <n>: set timeout for non-SMTP acceptance
2625 -os <n>: set timeout for SMTP acceptance */
2627 else if (*argrest == 'r' || *argrest == 's')
2629 int *tp = (*argrest == 'r')?
2630 &arg_receive_timeout : &arg_smtp_receive_timeout;
2631 if (argrest[1] == 0)
2633 if (i+1 < argc) *tp= readconf_readtime(argv[++i], 0, FALSE);
2635 else *tp = readconf_readtime(argrest + 1, 0, FALSE);
2638 fprintf(stderr, "exim: bad time value %s: abandoned\n", argv[i]);
2643 /* -oX <list>: Override local_interfaces and/or default daemon ports */
2645 else if (Ustrcmp(argrest, "X") == 0)
2646 override_local_interfaces = argv[++i];
2648 /* Unknown -o argument */
2654 /* -ps: force Perl startup; -pd force delayed Perl startup */
2658 if (*argrest == 's' && argrest[1] == 0)
2660 perl_start_option = 1;
2663 if (*argrest == 'd' && argrest[1] == 0)
2665 perl_start_option = -1;
2670 /* -panythingelse is taken as the Sendmail-compatible argument -prval:sval,
2671 which sets the host protocol and host name */
2675 if (i+1 < argc) argrest = argv[++i]; else
2676 { badarg = TRUE; break; }
2681 uschar *hn = Ustrchr(argrest, ':');
2684 received_protocol = argrest;
2688 received_protocol = string_copyn(argrest, hn - argrest);
2689 sender_host_name = hn + 1;
2696 receiving_message = FALSE;
2697 if (queue_interval >= 0)
2699 fprintf(stderr, "exim: -q specified more than once\n");
2703 /* -qq...: Do queue runs in a 2-stage manner */
2705 if (*argrest == 'q')
2707 queue_2stage = TRUE;
2711 /* -qi...: Do only first (initial) deliveries */
2713 if (*argrest == 'i')
2715 queue_run_first_delivery = TRUE;
2719 /* -qf...: Run the queue, forcing deliveries
2720 -qff..: Ditto, forcing thawing as well */
2722 if (*argrest == 'f')
2724 queue_run_force = TRUE;
2725 if (*(++argrest) == 'f')
2727 deliver_force_thaw = TRUE;
2732 /* -q[f][f]l...: Run the queue only on local deliveries */
2734 if (*argrest == 'l')
2736 queue_run_local = TRUE;
2740 /* -q[f][f][l]: Run the queue, optionally forced, optionally local only,
2741 optionally starting from a given message id. */
2743 if (*argrest == 0 &&
2744 (i + 1 >= argc || argv[i+1][0] == '-' || mac_ismsgid(argv[i+1])))
2747 if (i+1 < argc && mac_ismsgid(argv[i+1]))
2748 start_queue_run_id = argv[++i];
2749 if (i+1 < argc && mac_ismsgid(argv[i+1]))
2750 stop_queue_run_id = argv[++i];
2753 /* -q[f][f][l]<n>: Run the queue at regular intervals, optionally forced,
2754 optionally local only. */
2759 queue_interval = readconf_readtime(argrest, 0, FALSE);
2761 queue_interval = readconf_readtime(argv[++i], 0, FALSE);
2762 if (queue_interval <= 0)
2764 fprintf(stderr, "exim: bad time value %s: abandoned\n", argv[i]);
2771 case 'R': /* Synonymous with -qR... */
2772 receiving_message = FALSE;
2774 /* -Rf: As -R (below) but force all deliveries,
2775 -Rff: Ditto, but also thaw all frozen messages,
2776 -Rr: String is regex
2777 -Rrf: Regex and force
2778 -Rrff: Regex and force and thaw
2780 in all cases provided there are no further characters in this
2786 for (i = 0; i < sizeof(rsopts)/sizeof(uschar *); i++)
2788 if (Ustrcmp(argrest, rsopts[i]) == 0)
2790 if (i != 2) queue_run_force = TRUE;
2791 if (i >= 2) deliver_selectstring_regex = TRUE;
2792 if (i == 1 || i == 4) deliver_force_thaw = TRUE;
2793 argrest += Ustrlen(rsopts[i]);
2798 /* -R: Set string to match in addresses for forced queue run to
2799 pick out particular messages. */
2803 if (i+1 < argc) deliver_selectstring = argv[++i]; else
2805 fprintf(stderr, "exim: string expected after -R\n");
2809 else deliver_selectstring = argrest;
2813 /* -r: an obsolete synonym for -f (see above) */
2816 /* -S: Like -R but works on sender. */
2818 case 'S': /* Synonymous with -qS... */
2819 receiving_message = FALSE;
2821 /* -Sf: As -S (below) but force all deliveries,
2822 -Sff: Ditto, but also thaw all frozen messages,
2823 -Sr: String is regex
2824 -Srf: Regex and force
2825 -Srff: Regex and force and thaw
2827 in all cases provided there are no further characters in this
2833 for (i = 0; i < sizeof(rsopts)/sizeof(uschar *); i++)
2835 if (Ustrcmp(argrest, rsopts[i]) == 0)
2837 if (i != 2) queue_run_force = TRUE;
2838 if (i >= 2) deliver_selectstring_sender_regex = TRUE;
2839 if (i == 1 || i == 4) deliver_force_thaw = TRUE;
2840 argrest += Ustrlen(rsopts[i]);
2845 /* -S: Set string to match in addresses for forced queue run to
2846 pick out particular messages. */
2850 if (i+1 < argc) deliver_selectstring_sender = argv[++i]; else
2852 fprintf(stderr, "exim: string expected after -S\n");
2856 else deliver_selectstring_sender = argrest;
2859 /* -Tqt is an option that is exclusively for use by the testing suite.
2860 It is not recognized in other circumstances. It allows for the setting up
2861 of explicit "queue times" so that various warning/retry things can be
2862 tested. Otherwise variability of clock ticks etc. cause problems. */
2865 if (running_in_test_harness && Ustrcmp(argrest, "qt") == 0)
2866 fudged_queue_times = argv[++i];
2871 /* -t: Set flag to extract recipients from body of message. */
2874 if (*argrest == 0) extract_recipients = TRUE;
2876 /* -ti: Set flag to extract recipients from body of message, and also
2877 specify that dot does not end the message. */
2879 else if (Ustrcmp(argrest, "i") == 0)
2881 extract_recipients = TRUE;
2885 /* -tls-on-connect: don't wait for STARTTLS (for old clients) */
2888 else if (Ustrcmp(argrest, "ls-on-connect") == 0) tls_on_connect = TRUE;
2895 /* -U: This means "initial user submission" in sendmail, apparently. The
2896 doc claims that in future sendmail may refuse syntactically invalid
2897 messages instead of fixing them. For the moment, we just ignore it. */
2903 /* -v: verify things - this is a very low-level debugging */
2908 debug_selector |= D_v;
2909 debug_file = stderr;
2915 /* -x: AIX uses this to indicate some fancy 8-bit character stuff:
2917 The -x flag tells the sendmail command that mail from a local
2918 mail program has National Language Support (NLS) extended characters
2919 in the body of the mail item. The sendmail command can send mail with
2920 extended NLS characters across networks that normally corrupts these
2923 As Exim is 8-bit clean, it just ignores this flag. */
2926 if (*argrest != 0) badarg = TRUE;
2929 /* All other initial characters are errors */
2934 } /* End of high-level switch statement */
2936 /* Failed to recognize the option, or syntax error */
2940 fprintf(stderr, "exim abandoned: unknown, malformed, or incomplete "
2941 "option %s\n", arg);
2947 /* If -R or -S have been specified without -q, assume a single queue run. */
2949 if ((deliver_selectstring != NULL || deliver_selectstring_sender != NULL) &&
2950 queue_interval < 0) queue_interval = 0;
2954 /* If usage_wanted is set we call the usage function - which never returns */
2955 if (usage_wanted) exim_usage(called_as);
2957 /* Arguments have been processed. Check for incompatibilities. */
2959 (smtp_input || extract_recipients || recipients_arg < argc) &&
2960 (daemon_listen || queue_interval >= 0 || bi_option ||
2961 test_retry_arg >= 0 || test_rewrite_arg >= 0 ||
2962 filter_test != FTEST_NONE || (msg_action_arg > 0 && !one_msg_action))
2965 msg_action_arg > 0 &&
2966 (daemon_listen || queue_interval >= 0 || list_options ||
2967 (checking && msg_action != MSG_LOAD) ||
2968 bi_option || test_retry_arg >= 0 || test_rewrite_arg >= 0)
2971 (daemon_listen || queue_interval >= 0) &&
2972 (sender_address != NULL || list_options || list_queue || checking ||
2976 daemon_listen && queue_interval == 0
2980 (checking || smtp_input || extract_recipients ||
2981 filter_test != FTEST_NONE || bi_option)
2984 verify_address_mode &&
2985 (address_test_mode || smtp_input || extract_recipients ||
2986 filter_test != FTEST_NONE || bi_option)
2989 address_test_mode && (smtp_input || extract_recipients ||
2990 filter_test != FTEST_NONE || bi_option)
2993 smtp_input && (sender_address != NULL || filter_test != FTEST_NONE ||
2997 deliver_selectstring != NULL && queue_interval < 0
3000 msg_action == MSG_LOAD &&
3001 (!expansion_test || expansion_test_message != NULL)
3005 fprintf(stderr, "exim: incompatible command-line options or arguments\n");
3009 /* If debugging is set up, set the file and the file descriptor to pass on to
3010 child processes. It should, of course, be 2 for stderr. Also, force the daemon
3011 to run in the foreground. */
3013 if (debug_selector != 0)
3015 debug_file = stderr;
3016 debug_fd = fileno(debug_file);
3017 background_daemon = FALSE;
3018 if (running_in_test_harness) millisleep(100); /* lets caller finish */
3019 if (debug_selector != D_v) /* -v only doesn't show this */
3021 debug_printf("Exim version %s uid=%ld gid=%ld pid=%d D=%x\n",
3022 version_string, (long int)real_uid, (long int)real_gid, (int)getpid(),
3024 show_whats_supported(stderr);
3028 /* When started with root privilege, ensure that the limits on the number of
3029 open files and the number of processes (where that is accessible) are
3030 sufficiently large, or are unset, in case Exim has been called from an
3031 environment where the limits are screwed down. Not all OS have the ability to
3032 change some of these limits. */
3036 DEBUG(D_any) debug_print_ids(US"Exim has no root privilege:");
3042 #ifdef RLIMIT_NOFILE
3043 if (getrlimit(RLIMIT_NOFILE, &rlp) < 0)
3045 log_write(0, LOG_MAIN|LOG_PANIC, "getrlimit(RLIMIT_NOFILE) failed: %s",
3047 rlp.rlim_cur = rlp.rlim_max = 0;
3050 /* I originally chose 1000 as a nice big number that was unlikely to
3051 be exceeded. It turns out that some older OS have a fixed upper limit of
3054 if (rlp.rlim_cur < 1000)
3056 rlp.rlim_cur = rlp.rlim_max = 1000;
3057 if (setrlimit(RLIMIT_NOFILE, &rlp) < 0)
3059 rlp.rlim_cur = rlp.rlim_max = 256;
3060 if (setrlimit(RLIMIT_NOFILE, &rlp) < 0)
3061 log_write(0, LOG_MAIN|LOG_PANIC, "setrlimit(RLIMIT_NOFILE) failed: %s",
3068 if (getrlimit(RLIMIT_NPROC, &rlp) < 0)
3070 log_write(0, LOG_MAIN|LOG_PANIC, "getrlimit(RLIMIT_NPROC) failed: %s",
3072 rlp.rlim_cur = rlp.rlim_max = 0;
3075 #ifdef RLIM_INFINITY
3076 if (rlp.rlim_cur != RLIM_INFINITY && rlp.rlim_cur < 1000)
3078 rlp.rlim_cur = rlp.rlim_max = RLIM_INFINITY;
3080 if (rlp.rlim_cur < 1000)
3082 rlp.rlim_cur = rlp.rlim_max = 1000;
3084 if (setrlimit(RLIMIT_NPROC, &rlp) < 0)
3085 log_write(0, LOG_MAIN|LOG_PANIC, "setrlimit(RLIMIT_NPROC) failed: %s",
3091 /* Exim is normally entered as root (but some special configurations are
3092 possible that don't do this). However, it always spins off sub-processes that
3093 set their uid and gid as required for local delivery. We don't want to pass on
3094 any extra groups that root may belong to, so we want to get rid of them all at
3097 We need to obey setgroups() at this stage, before possibly giving up root
3098 privilege for a changed configuration file, but later on we might need to
3099 check on the additional groups for the admin user privilege - can't do that
3100 till after reading the config, which might specify the exim gid. Therefore,
3101 save the group list here first. */
3103 group_count = getgroups(NGROUPS_MAX, group_list);
3105 /* There is a fundamental difference in some BSD systems in the matter of
3106 groups. FreeBSD and BSDI are known to be different; NetBSD and OpenBSD are
3107 known not to be different. On the "different" systems there is a single group
3108 list, and the first entry in it is the current group. On all other versions of
3109 Unix there is a supplementary group list, which is in *addition* to the current
3110 group. Consequently, to get rid of all extraneous groups on a "standard" system
3111 you pass over 0 groups to setgroups(), while on a "different" system you pass
3112 over a single group - the current group, which is always the first group in the
3113 list. Calling setgroups() with zero groups on a "different" system results in
3114 an error return. The following code should cope with both types of system.
3116 However, if this process isn't running as root, setgroups() can't be used
3117 since you have to be root to run it, even if throwing away groups. Not being
3118 root here happens only in some unusual configurations. We just ignore the
3121 if (setgroups(0, NULL) != 0)
3123 if (setgroups(1, group_list) != 0 && !unprivileged)
3125 fprintf(stderr, "exim: setgroups() failed: %s\n", strerror(errno));
3130 /* If the configuration file name has been altered by an argument on the
3131 command line (either a new file name or a macro definition) and the caller is
3132 not root, or if this is a filter testing run, remove any setuid privilege the
3133 program has and run as the underlying user.
3135 The exim user is locked out of this, which severely restricts the use of -C
3138 Otherwise, set the real ids to the effective values (should be root unless run
3139 from inetd, which it can either be root or the exim uid, if one is configured).
3141 There is a private mechanism for bypassing some of this, in order to make it
3142 possible to test lots of configurations automatically, without having either to
3143 recompile each time, or to patch in an actual configuration file name and other
3144 values (such as the path name). If running in the test harness, pretend that
3145 configuration file changes and macro definitions haven't happened. */
3148 (!trusted_config || macros != NULL) && /* Config changed, and */
3149 real_uid != root_uid && /* Not root, and */
3150 !running_in_test_harness /* Not fudged */
3152 expansion_test /* expansion testing */
3154 filter_test != FTEST_NONE) /* Filter testing */
3156 setgroups(group_count, group_list);
3157 exim_setugid(real_uid, real_gid, FALSE,
3158 US"-C, -D, -be or -bf forces real uid");
3159 removed_privilege = TRUE;
3161 /* In the normal case when Exim is called like this, stderr is available
3162 and should be used for any logging information because attempts to write
3163 to the log will usually fail. To arrange this, we unset really_exim. However,
3164 if no stderr is available there is no point - we might as well have a go
3165 at the log (if it fails, syslog will be written). */
3167 if (log_stderr != NULL) really_exim = FALSE;
3170 /* Privilege is to be retained for the moment. It may be dropped later,
3171 depending on the job that this Exim process has been asked to do. For now, set
3172 the real uid to the effective so that subsequent re-execs of Exim are done by a
3175 else exim_setugid(geteuid(), getegid(), FALSE, US"forcing real = effective");
3177 /* If testing a filter, open the file(s) now, before wasting time doing other
3178 setups and reading the message. */
3180 if ((filter_test & FTEST_SYSTEM) != 0)
3182 filter_sfd = Uopen(filter_test_sfile, O_RDONLY, 0);
3185 fprintf(stderr, "exim: failed to open %s: %s\n", filter_test_sfile,
3187 return EXIT_FAILURE;
3191 if ((filter_test & FTEST_USER) != 0)
3193 filter_ufd = Uopen(filter_test_ufile, O_RDONLY, 0);
3196 fprintf(stderr, "exim: failed to open %s: %s\n", filter_test_ufile,
3198 return EXIT_FAILURE;
3202 /* Read the main runtime configuration data; this gives up if there
3203 is a failure. It leaves the configuration file open so that the subsequent
3204 configuration data for delivery can be read if needed. */
3208 /* Handle the decoding of logging options. */
3210 decode_bits(&log_write_selector, &log_extra_selector, 0, 0,
3211 log_selector_string, log_options, log_options_count, US"log", 0);
3215 debug_printf("configuration file is %s\n", config_main_filename);
3216 debug_printf("log selectors = %08x %08x\n", log_write_selector,
3217 log_extra_selector);
3220 /* If domain literals are not allowed, check the sender address that was
3221 supplied with -f. Ditto for a stripped trailing dot. */
3223 if (sender_address != NULL)
3225 if (sender_address[sender_address_domain] == '[' && !allow_domain_literals)
3227 fprintf(stderr, "exim: bad -f address \"%s\": domain literals not "
3228 "allowed\n", sender_address);
3229 return EXIT_FAILURE;
3231 if (f_end_dot && !strip_trailing_dot)
3233 fprintf(stderr, "exim: bad -f address \"%s.\": domain is malformed "
3234 "(trailing dot not allowed)\n", sender_address);
3235 return EXIT_FAILURE;
3239 /* Paranoia check of maximum lengths of certain strings. There is a check
3240 on the length of the log file path in log.c, which will come into effect
3241 if there are any calls to write the log earlier than this. However, if we
3242 get this far but the string is very long, it is better to stop now than to
3243 carry on and (e.g.) receive a message and then have to collapse. The call to
3244 log_write() from here will cause the ultimate panic collapse if the complete
3245 file name exceeds the buffer length. */
3247 if (Ustrlen(log_file_path) > 200)
3248 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3249 "log_file_path is longer than 200 chars: aborting");
3251 if (Ustrlen(pid_file_path) > 200)
3252 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3253 "pid_file_path is longer than 200 chars: aborting");
3255 if (Ustrlen(spool_directory) > 200)
3256 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3257 "spool_directory is longer than 200 chars: aborting");
3259 /* Length check on the process name given to syslog for its TAG field,
3260 which is only permitted to be 32 characters or less. See RFC 3164. */
3262 if (Ustrlen(syslog_processname) > 32)
3263 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3264 "syslog_processname is longer than 32 chars: aborting");
3266 /* In some operating systems, the environment variable TMPDIR controls where
3267 temporary files are created; Exim doesn't use these (apart from when delivering
3268 to MBX mailboxes), but called libraries such as DBM libraries may require them.
3269 If TMPDIR is found in the environment, reset it to the value defined in the
3270 TMPDIR macro, if this macro is defined. */
3275 for (p = USS environ; *p != NULL; p++)
3277 if (Ustrncmp(*p, "TMPDIR=", 7) == 0 &&
3278 Ustrcmp(*p+7, TMPDIR) != 0)
3280 uschar *newp = malloc(Ustrlen(TMPDIR) + 8);
3281 sprintf(CS newp, "TMPDIR=%s", TMPDIR);
3283 DEBUG(D_any) debug_printf("reset TMPDIR=%s in environment\n", TMPDIR);
3289 /* Timezone handling. If timezone_string is "utc", set a flag to cause all
3290 timestamps to be in UTC (gmtime() is used instead of localtime()). Otherwise,
3291 we may need to get rid of a bogus timezone setting. This can arise when Exim is
3292 called by a user who has set the TZ variable. This then affects the timestamps
3293 in log files and in Received: headers, and any created Date: header lines. The
3294 required timezone is settable in the configuration file, so nothing can be done
3295 about this earlier - but hopefully nothing will normally be logged earlier than
3296 this. We have to make a new environment if TZ is wrong, but don't bother if
3297 timestamps_utc is set, because then all times are in UTC anyway. */
3299 if (timezone_string != NULL && strcmpic(timezone_string, US"UTC") == 0)
3301 timestamps_utc = TRUE;
3305 uschar *envtz = US getenv("TZ");
3306 if ((envtz == NULL && timezone_string != NULL) ||
3308 (timezone_string == NULL ||
3309 Ustrcmp(timezone_string, envtz) != 0)))
3311 uschar **p = USS environ;
3315 while (*p++ != NULL) count++;
3316 if (envtz == NULL) count++;
3317 newp = new = malloc(sizeof(uschar *) * (count + 1));
3318 for (p = USS environ; *p != NULL; p++)
3320 if (Ustrncmp(*p, "TZ=", 3) == 0) continue;
3323 if (timezone_string != NULL)
3325 *newp = malloc(Ustrlen(timezone_string) + 4);
3326 sprintf(CS *newp++, "TZ=%s", timezone_string);
3331 DEBUG(D_any) debug_printf("Reset TZ to %s: time is %s\n", timezone_string,
3332 tod_stamp(tod_log));
3336 /* Handle the case when we have removed the setuid privilege because of -C or
3337 -D. This means that the caller of Exim was not root.
3339 There is a problem if we were running as the Exim user. The sysadmin may
3340 expect this case to retain privilege because "the binary was called by the
3341 Exim user", but it hasn't, because either the -D option set macros, or the
3342 -C option set a non-trusted configuration file. There are two possibilities:
3344 (1) If deliver_drop_privilege is set, Exim is not going to re-exec in order
3345 to do message deliveries. Thus, the fact that it is running as a
3346 non-privileged user is plausible, and might be wanted in some special
3347 configurations. However, really_exim will have been set false when
3348 privilege was dropped, to stop Exim trying to write to its normal log
3349 files. Therefore, re-enable normal log processing, assuming the sysadmin
3350 has set up the log directory correctly.
3352 (2) If deliver_drop_privilege is not set, the configuration won't work as
3353 apparently intended, and so we log a panic message. In order to retain
3354 root for -C or -D, the caller must either be root or be invoking a
3355 trusted configuration file (when deliver_drop_privilege is false). */
3357 if (removed_privilege && (!trusted_config || macros != NULL) &&
3358 real_uid == exim_uid)
3360 if (deliver_drop_privilege)
3361 really_exim = TRUE; /* let logging work normally */
3363 log_write(0, LOG_MAIN|LOG_PANIC,
3364 "exim user lost privilege for using %s option",
3365 (int)exim_uid, trusted_config? "-D" : "-C");
3368 /* Start up Perl interpreter if Perl support is configured and there is a
3369 perl_startup option, and the configuration or the command line specifies
3370 initializing starting. Note that the global variables are actually called
3371 opt_perl_xxx to avoid clashing with perl's namespace (perl_*). */
3374 if (perl_start_option != 0)
3375 opt_perl_at_start = (perl_start_option > 0);
3376 if (opt_perl_at_start && opt_perl_startup != NULL)
3379 DEBUG(D_any) debug_printf("Starting Perl interpreter\n");
3380 errstr = init_perl(opt_perl_startup);
3383 fprintf(stderr, "exim: error in perl_startup code: %s\n", errstr);
3384 return EXIT_FAILURE;
3386 opt_perl_started = TRUE;
3388 #endif /* EXIM_PERL */
3390 /* Log the arguments of the call if the configuration file said so. This is
3391 a debugging feature for finding out what arguments certain MUAs actually use.
3392 Don't attempt it if logging is disabled, or if listing variables or if
3393 verifying/testing addresses or expansions. */
3395 if (((debug_selector & D_any) != 0 || (log_extra_selector & LX_arguments) != 0)
3396 && really_exim && !list_options && !checking)
3399 uschar *p = big_buffer;
3401 (void)getcwd(CS p+4, big_buffer_size - 4);
3403 (void)string_format(p, big_buffer_size - (p - big_buffer), " %d args:", argc);
3405 for (i = 0; i < argc; i++)
3407 int len = Ustrlen(argv[i]);
3410 if (p + len + 8 >= big_buffer + big_buffer_size)
3413 log_write(0, LOG_MAIN, "%s", big_buffer);
3414 Ustrcpy(big_buffer, "...");
3417 printing = string_printing(argv[i]);
3418 if (printing[0] == 0) quote = US"\""; else
3420 uschar *pp = printing;
3422 while (*pp != 0) if (isspace(*pp++)) { quote = US"\""; break; }
3424 sprintf(CS p, " %s%.*s%s", quote, (int)(big_buffer_size -
3425 (p - big_buffer) - 4), printing, quote);
3429 if ((log_extra_selector & LX_arguments) != 0)
3430 log_write(0, LOG_MAIN, "%s", big_buffer);
3432 debug_printf("%s\n", big_buffer);
3435 /* Set the working directory to be the top-level spool directory. We don't rely
3436 on this in the code, which always uses fully qualified names, but it's useful
3437 for core dumps etc. Don't complain if it fails - the spool directory might not
3438 be generally accessible and calls with the -C option (and others) have lost
3439 privilege by now. Before the chdir, we try to ensure that the directory exists.
3442 if (Uchdir(spool_directory) != 0)
3444 (void)directory_make(spool_directory, US"", SPOOL_DIRECTORY_MODE, FALSE);
3445 (void)Uchdir(spool_directory);
3448 /* Handle calls with the -bi option. This is a sendmail option to rebuild *the*
3449 alias file. Exim doesn't have such a concept, but this call is screwed into
3450 Sun's YP makefiles. Handle this by calling a configured script, as the real
3451 user who called Exim. The -oA option can be used to pass an argument to the
3456 (void)fclose(config_file);
3457 if (bi_command != NULL)
3461 argv[i++] = bi_command;
3462 if (alias_arg != NULL) argv[i++] = alias_arg;
3465 setgroups(group_count, group_list);
3466 exim_setugid(real_uid, real_gid, FALSE, US"running bi_command");
3468 DEBUG(D_exec) debug_printf("exec %.256s %.256s\n", argv[0],
3469 (argv[1] == NULL)? US"" : argv[1]);
3471 execv(CS argv[0], (char *const *)argv);
3472 fprintf(stderr, "exim: exec failed: %s\n", strerror(errno));
3477 DEBUG(D_any) debug_printf("-bi used but bi_command not set; exiting\n");
3482 /* If an action on specific messages is requested, or if a daemon or queue
3483 runner is being started, we need to know if Exim was called by an admin user.
3484 This is the case if the real user is root or exim, or if the real group is
3485 exim, or if one of the supplementary groups is exim or a group listed in
3486 admin_groups. We don't fail all message actions immediately if not admin_user,
3487 since some actions can be performed by non-admin users. Instead, set admin_user
3488 for later interrogation. */
3490 if (real_uid == root_uid || real_uid == exim_uid || real_gid == exim_gid)
3495 for (i = 0; i < group_count; i++)
3497 if (group_list[i] == exim_gid) admin_user = TRUE;
3498 else if (admin_groups != NULL)
3500 for (j = 1; j <= (int)(admin_groups[0]); j++)
3501 if (admin_groups[j] == group_list[i])
3502 { admin_user = TRUE; break; }
3504 if (admin_user) break;
3508 /* Another group of privileged users are the trusted users. These are root,
3509 exim, and any caller matching trusted_users or trusted_groups. Trusted callers
3510 are permitted to specify sender_addresses with -f on the command line, and
3511 other message parameters as well. */
3513 if (real_uid == root_uid || real_uid == exim_uid)
3514 trusted_caller = TRUE;
3519 if (trusted_users != NULL)
3521 for (i = 1; i <= (int)(trusted_users[0]); i++)
3522 if (trusted_users[i] == real_uid)
3523 { trusted_caller = TRUE; break; }
3526 if (!trusted_caller && trusted_groups != NULL)
3528 for (i = 1; i <= (int)(trusted_groups[0]); i++)
3530 if (trusted_groups[i] == real_gid)
3531 trusted_caller = TRUE;
3532 else for (j = 0; j < group_count; j++)
3534 if (trusted_groups[i] == group_list[j])
3535 { trusted_caller = TRUE; break; }
3537 if (trusted_caller) break;
3542 if (trusted_caller) DEBUG(D_any) debug_printf("trusted user\n");
3543 if (admin_user) DEBUG(D_any) debug_printf("admin user\n");
3545 /* Only an admin user may start the daemon or force a queue run in the default
3546 configuration, but the queue run restriction can be relaxed. Only an admin
3547 user may request that a message be returned to its sender forthwith. Only an
3548 admin user may specify a debug level greater than D_v (because it might show
3549 passwords, etc. in lookup queries). Only an admin user may request a queue
3550 count. Only an admin user can use the test interface to scan for email
3551 (because Exim will be in the spool dir and able to look at mails). */
3555 BOOL debugset = (debug_selector & ~D_v) != 0;
3556 if (deliver_give_up || daemon_listen || malware_test_file ||
3557 (count_queue && queue_list_requires_admin) ||
3558 (list_queue && queue_list_requires_admin) ||
3559 (queue_interval >= 0 && prod_requires_admin) ||
3560 (debugset && !running_in_test_harness))
3562 fprintf(stderr, "exim:%s permission denied\n", debugset? " debugging" : "");
3567 /* If the real user is not root or the exim uid, the argument for passing
3568 in an open TCP/IP connection for another message is not permitted, nor is
3569 running with the -N option for any delivery action, unless this call to exim is
3570 one that supplied an input message, or we are using a patched exim for
3571 regression testing. */
3573 if (real_uid != root_uid && real_uid != exim_uid &&
3574 (continue_hostname != NULL ||
3576 (queue_interval >= 0 || daemon_listen || msg_action_arg > 0)
3577 )) && !running_in_test_harness)
3579 fprintf(stderr, "exim: Permission denied\n");
3580 return EXIT_FAILURE;
3583 /* If the caller is not trusted, certain arguments are ignored when running for
3584 real, but are permitted when checking things (-be, -bv, -bt, -bh, -bf, -bF).
3585 Note that authority for performing certain actions on messages is tested in the
3586 queue_action() function. */
3588 if (!trusted_caller && !checking && filter_test == FTEST_NONE)
3590 sender_host_name = sender_host_address = interface_address =
3591 sender_ident = received_protocol = NULL;
3592 sender_host_port = interface_port = 0;
3593 sender_host_authenticated = authenticated_sender = authenticated_id = NULL;
3596 /* If a sender host address is set, extract the optional port number off the
3597 end of it and check its syntax. Do the same thing for the interface address.
3598 Exim exits if the syntax is bad. */
3602 if (sender_host_address != NULL)
3603 sender_host_port = check_port(sender_host_address);
3604 if (interface_address != NULL)
3605 interface_port = check_port(interface_address);
3608 /* If an SMTP message is being received check to see if the standard input is a
3609 TCP/IP socket. If it is, we assume that Exim was called from inetd if the
3610 caller is root or the Exim user, or if the port is a privileged one. Otherwise,
3615 union sockaddr_46 inetd_sock;
3616 EXIM_SOCKLEN_T size = sizeof(inetd_sock);
3617 if (getpeername(0, (struct sockaddr *)(&inetd_sock), &size) == 0)
3619 int family = ((struct sockaddr *)(&inetd_sock))->sa_family;
3620 if (family == AF_INET || family == AF_INET6)
3622 union sockaddr_46 interface_sock;
3623 size = sizeof(interface_sock);
3625 if (getsockname(0, (struct sockaddr *)(&interface_sock), &size) == 0)
3626 interface_address = host_ntoa(-1, &interface_sock, NULL,
3629 if (host_is_tls_on_connect_port(interface_port)) tls_on_connect = TRUE;
3631 if (real_uid == root_uid || real_uid == exim_uid || interface_port < 1024)
3634 sender_host_address = host_ntoa(-1, (struct sockaddr *)(&inetd_sock),
3635 NULL, &sender_host_port);
3636 if (mua_wrapper) log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Input from "
3637 "inetd is not supported when mua_wrapper is set");
3642 "exim: Permission denied (unprivileged user, unprivileged port)\n");
3643 return EXIT_FAILURE;
3649 /* If the load average is going to be needed while receiving a message, get it
3650 now for those OS that require the first call to os_getloadavg() to be done as
3651 root. There will be further calls later for each message received. */
3653 #ifdef LOAD_AVG_NEEDS_ROOT
3654 if (receiving_message &&
3655 (queue_only_load >= 0 ||
3656 (is_inetd && smtp_load_reserve >= 0)
3659 load_average = OS_GETLOADAVG();
3663 /* The queue_only configuration option can be overridden by -odx on the command
3664 line, except that if queue_only_override is false, queue_only cannot be unset
3665 from the command line. */
3667 if (queue_only_set && (queue_only_override || arg_queue_only))
3668 queue_only = arg_queue_only;
3670 /* The receive_timeout and smtp_receive_timeout options can be overridden by
3673 if (arg_receive_timeout >= 0) receive_timeout = arg_receive_timeout;
3674 if (arg_smtp_receive_timeout >= 0)
3675 smtp_receive_timeout = arg_smtp_receive_timeout;
3677 /* If Exim was started with root privilege, unless we have already removed the
3678 root privilege above as a result of -C, -D, -be, -bf or -bF, remove it now
3679 except when starting the daemon or doing some kind of delivery or address
3680 testing (-bt). These are the only cases when root need to be retained. We run
3681 as exim for -bv and -bh. However, if deliver_drop_privilege is set, root is
3682 retained only for starting the daemon. We always do the initgroups() in this
3683 situation (controlled by the TRUE below), in order to be as close as possible
3684 to the state Exim usually runs in. */
3686 if (!unprivileged && /* originally had root AND */
3687 !removed_privilege && /* still got root AND */
3688 !daemon_listen && /* not starting the daemon */
3689 queue_interval <= 0 && /* (either kind of daemon) */
3691 deliver_drop_privilege || /* requested unprivileged */
3693 queue_interval < 0 && /* not running the queue */
3694 (msg_action_arg < 0 || /* and */
3695 msg_action != MSG_DELIVER) && /* not delivering and */
3696 (!checking || !address_test_mode) /* not address checking */
3700 exim_setugid(exim_uid, exim_gid, TRUE, US"privilege not needed");
3703 /* When we are retaining a privileged uid, we still change to the exim gid. */
3705 else setgid(exim_gid);
3707 /* Handle a request to scan a file for malware */
3708 if (malware_test_file)
3710 #ifdef WITH_CONTENT_SCAN
3712 set_process_info("scanning file for malware");
3713 result = malware_in_file(malware_test_file);
3716 printf("No malware found.\n");
3721 printf("Malware lookup returned non-okay/fail: %d\n", result);
3725 printf("Malware found: %s\n", malware_name);
3727 printf("Malware scan detected malware of unknown name.\n");
3729 printf("Malware scanning not enabled at compile time.\n");
3734 /* Handle a request to list the delivery queue */
3738 set_process_info("listing the queue");
3739 queue_list(list_queue_option, argv + recipients_arg, argc - recipients_arg);
3743 /* Handle a request to count the delivery queue */
3747 set_process_info("counting the queue");
3752 /* Handle actions on specific messages, except for the force delivery and
3753 message load actions, which are done below. Some actions take a whole list of
3754 message ids, which are known to continue up to the end of the arguments. Others
3755 take a single message id and then operate on the recipients list. */
3757 if (msg_action_arg > 0 && msg_action != MSG_DELIVER && msg_action != MSG_LOAD)
3759 int yield = EXIT_SUCCESS;
3760 set_process_info("acting on specified messages");
3762 if (!one_msg_action)
3764 for (i = msg_action_arg; i < argc; i++)
3765 if (!queue_action(argv[i], msg_action, NULL, 0, 0))
3766 yield = EXIT_FAILURE;
3769 else if (!queue_action(argv[msg_action_arg], msg_action, argv, argc,
3770 recipients_arg)) yield = EXIT_FAILURE;
3774 /* All the modes below here require the remaining configuration sections
3775 to be read, except that we can skip over the ACL setting when delivering
3776 specific messages, or doing a queue run. (For various testing cases we could
3777 skip too, but as they are rare, it doesn't really matter.) The argument is TRUE
3780 readconf_rest(msg_action_arg > 0 || (queue_interval == 0 && !daemon_listen));
3782 /* The configuration data will have been read into POOL_PERM because we won't
3783 ever want to reset back past it. Change the current pool to POOL_MAIN. In fact,
3784 this is just a bit of pedantic tidiness. It wouldn't really matter if the
3785 configuration were read into POOL_MAIN, because we don't do any resets till
3786 later on. However, it seems right, and it does ensure that both pools get used.
3789 store_pool = POOL_MAIN;
3791 /* Handle the -brt option. This is for checking out retry configurations.
3792 The next three arguments are a domain name or a complete address, and
3793 optionally two error numbers. All it does is to call the function that
3794 scans the retry configuration data. */
3796 if (test_retry_arg >= 0)
3798 retry_config *yield;
3799 int basic_errno = 0;
3803 if (test_retry_arg >= argc)
3805 printf("-brt needs a domain or address argument\n");
3806 exim_exit(EXIT_FAILURE);
3808 s1 = argv[test_retry_arg++];
3811 /* If the first argument contains no @ and no . it might be a local user
3812 or it might be a single-component name. Treat as a domain. */
3814 if (Ustrchr(s1, '@') == NULL && Ustrchr(s1, '.') == NULL)
3816 printf("Warning: \"%s\" contains no '@' and no '.' characters. It is "
3817 "being \ntreated as a one-component domain, not as a local part.\n\n",
3821 /* There may be an optional second domain arg. */
3823 if (test_retry_arg < argc && Ustrchr(argv[test_retry_arg], '.') != NULL)
3824 s2 = argv[test_retry_arg++];
3826 /* The final arg is an error name */
3828 if (test_retry_arg < argc)
3830 uschar *ss = argv[test_retry_arg];
3832 readconf_retry_error(ss, ss + Ustrlen(ss), &basic_errno, &more_errno);
3835 printf("%s\n", CS error);
3836 return EXIT_FAILURE;
3839 /* For the {MAIL,RCPT,DATA}_4xx errors, a value of 255 means "any", and a
3840 code > 100 as an error is for matching codes to the decade. Turn them into
3841 a real error code, off the decade. */
3843 if (basic_errno == ERRNO_MAIL4XX ||
3844 basic_errno == ERRNO_RCPT4XX ||
3845 basic_errno == ERRNO_DATA4XX)
3847 int code = (more_errno >> 8) & 255;
3849 more_errno = (more_errno & 0xffff00ff) | (21 << 8);
3850 else if (code > 100)
3851 more_errno = (more_errno & 0xffff00ff) | ((code - 96) << 8);
3855 yield = retry_find_config(s1, s2, basic_errno, more_errno);
3856 if (yield == NULL) printf("No retry information found\n"); else
3859 more_errno = yield->more_errno;
3860 printf("Retry rule: %s ", yield->pattern);
3862 if (yield->basic_errno == ERRNO_EXIMQUOTA)
3864 printf("quota%s%s ",
3865 (more_errno > 0)? "_" : "",
3866 (more_errno > 0)? readconf_printtime(more_errno) : US"");
3868 else if (yield->basic_errno == ECONNREFUSED)
3870 printf("refused%s%s ",
3871 (more_errno > 0)? "_" : "",
3872 (more_errno == 'M')? "MX" :
3873 (more_errno == 'A')? "A" : "");
3875 else if (yield->basic_errno == ETIMEDOUT)
3878 if ((more_errno & RTEF_CTOUT) != 0) printf("_connect");
3880 if (more_errno != 0) printf("_%s",
3881 (more_errno == 'M')? "MX" : "A");
3884 else if (yield->basic_errno == ERRNO_AUTHFAIL)
3885 printf("auth_failed ");
3888 for (r = yield->rules; r != NULL; r = r->next)
3890 printf("%c,%s", r->rule, readconf_printtime(r->timeout)); /* Do not */
3891 printf(",%s", readconf_printtime(r->p1)); /* amalgamate */
3897 printf(",%d.", x/1000);
3911 exim_exit(EXIT_SUCCESS);
3914 /* Handle a request to list one or more configuration options */
3918 set_process_info("listing variables");
3919 if (recipients_arg >= argc) readconf_print(US"all", NULL);
3920 else for (i = recipients_arg; i < argc; i++)
3923 (Ustrcmp(argv[i], "router") == 0 ||
3924 Ustrcmp(argv[i], "transport") == 0 ||
3925 Ustrcmp(argv[i], "authenticator") == 0 ||
3926 Ustrcmp(argv[i], "macro") == 0))
3928 readconf_print(argv[i+1], argv[i]);
3931 else readconf_print(argv[i], NULL);
3933 exim_exit(EXIT_SUCCESS);
3937 /* Handle a request to deliver one or more messages that are already on the
3938 queue. Values of msg_action other than MSG_DELIVER and MSG_LOAD are dealt with
3939 above. MSG_LOAD is handled with -be (which is the only time it applies) below.
3941 Delivery of specific messages is typically used for a small number when
3942 prodding by hand (when the option forced_delivery will be set) or when
3943 re-execing to regain root privilege. Each message delivery must happen in a
3944 separate process, so we fork a process for each one, and run them sequentially
3945 so that debugging output doesn't get intertwined, and to avoid spawning too
3946 many processes if a long list is given. However, don't fork for the last one;
3947 this saves a process in the common case when Exim is called to deliver just one
3950 if (msg_action_arg > 0 && msg_action != MSG_LOAD)
3952 if (prod_requires_admin && !admin_user)
3954 fprintf(stderr, "exim: Permission denied\n");
3955 exim_exit(EXIT_FAILURE);
3957 set_process_info("delivering specified messages");
3958 if (deliver_give_up) forced_delivery = deliver_force_thaw = TRUE;
3959 for (i = msg_action_arg; i < argc; i++)
3964 (void)deliver_message(argv[i], forced_delivery, deliver_give_up);
3965 else if ((pid = fork()) == 0)
3967 (void)deliver_message(argv[i], forced_delivery, deliver_give_up);
3968 _exit(EXIT_SUCCESS);
3972 fprintf(stderr, "failed to fork delivery process for %s: %s\n", argv[i],
3974 exim_exit(EXIT_FAILURE);
3978 exim_exit(EXIT_SUCCESS);
3982 /* If only a single queue run is requested, without SMTP listening, we can just
3983 turn into a queue runner, with an optional starting message id. */
3985 if (queue_interval == 0 && !daemon_listen)
3987 DEBUG(D_queue_run) debug_printf("Single queue run%s%s%s%s\n",
3988 (start_queue_run_id == NULL)? US"" : US" starting at ",
3989 (start_queue_run_id == NULL)? US"" : start_queue_run_id,
3990 (stop_queue_run_id == NULL)? US"" : US" stopping at ",
3991 (stop_queue_run_id == NULL)? US"" : stop_queue_run_id);
3992 set_process_info("running the queue (single queue run)");
3993 queue_run(start_queue_run_id, stop_queue_run_id, FALSE);
3994 exim_exit(EXIT_SUCCESS);
3998 /* Find the login name of the real user running this process. This is always
3999 needed when receiving a message, because it is written into the spool file. It
4000 may also be used to construct a from: or a sender: header, and in this case we
4001 need the user's full name as well, so save a copy of it, checked for RFC822
4002 syntax and munged if necessary, if it hasn't previously been set by the -F
4003 argument. We may try to get the passwd entry more than once, in case NIS or
4004 other delays are in evidence. Save the home directory for use in filter testing
4009 if ((pw = getpwuid(real_uid)) != NULL)
4011 originator_login = string_copy(US pw->pw_name);
4012 originator_home = string_copy(US pw->pw_dir);
4014 /* If user name has not been set by -F, set it from the passwd entry
4015 unless -f has been used to set the sender address by a trusted user. */
4017 if (originator_name == NULL)
4019 if (sender_address == NULL ||
4020 (!trusted_caller && filter_test == FTEST_NONE))
4022 uschar *name = US pw->pw_gecos;
4023 uschar *amp = Ustrchr(name, '&');
4026 /* Most Unix specify that a '&' character in the gecos field is
4027 replaced by a copy of the login name, and some even specify that
4028 the first character should be upper cased, so that's what we do. */
4033 string_format(buffer, sizeof(buffer), "%.*s%n%s%s",
4034 amp - name, name, &loffset, originator_login, amp + 1);
4035 buffer[loffset] = toupper(buffer[loffset]);
4039 /* If a pattern for matching the gecos field was supplied, apply
4040 it and then expand the name string. */
4042 if (gecos_pattern != NULL && gecos_name != NULL)
4045 re = regex_must_compile(gecos_pattern, FALSE, TRUE); /* Use malloc */
4047 if (regex_match_and_setup(re, name, 0, -1))
4049 uschar *new_name = expand_string(gecos_name);
4051 if (new_name != NULL)
4053 DEBUG(D_receive) debug_printf("user name \"%s\" extracted from "
4054 "gecos field \"%s\"\n", new_name, name);
4057 else DEBUG(D_receive) debug_printf("failed to expand gecos_name string "
4058 "\"%s\": %s\n", gecos_name, expand_string_message);
4060 else DEBUG(D_receive) debug_printf("gecos_pattern \"%s\" did not match "
4061 "gecos field \"%s\"\n", gecos_pattern, name);
4062 store_free((void *)re);
4064 originator_name = string_copy(name);
4067 /* A trusted caller has used -f but not -F */
4069 else originator_name = US"";
4072 /* Break the retry loop */
4077 if (++i > finduser_retries) break;
4081 /* If we cannot get a user login, log the incident and give up, unless the
4082 configuration specifies something to use. When running in the test harness,
4083 any setting of unknown_login overrides the actual name. */
4085 if (originator_login == NULL || running_in_test_harness)
4087 if (unknown_login != NULL)
4089 originator_login = expand_string(unknown_login);
4090 if (originator_name == NULL && unknown_username != NULL)
4091 originator_name = expand_string(unknown_username);
4092 if (originator_name == NULL) originator_name = US"";
4094 if (originator_login == NULL)
4095 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Failed to get user name for uid %d",
4099 /* Ensure that the user name is in a suitable form for use as a "phrase" in an
4102 originator_name = string_copy(parse_fix_phrase(originator_name,
4103 Ustrlen(originator_name), big_buffer, big_buffer_size));
4105 /* If a message is created by this call of Exim, the uid/gid of its originator
4106 are those of the caller. These values are overridden if an existing message is
4107 read in from the spool. */
4109 originator_uid = real_uid;
4110 originator_gid = real_gid;
4112 DEBUG(D_receive) debug_printf("originator: uid=%d gid=%d login=%s name=%s\n",
4113 (int)originator_uid, (int)originator_gid, originator_login, originator_name);
4115 /* Run in daemon and/or queue-running mode. The function daemon_go() never
4116 returns. We leave this till here so that the originator_ fields are available
4117 for incoming messages via the daemon. The daemon cannot be run in mua_wrapper
4120 if (daemon_listen || queue_interval > 0)
4124 fprintf(stderr, "Daemon cannot be run when mua_wrapper is set\n");
4125 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Daemon cannot be run when "
4126 "mua_wrapper is set");
4131 /* If the sender ident has not been set (by a trusted caller) set it to
4132 the caller. This will get overwritten below for an inetd call. If a trusted
4133 caller has set it empty, unset it. */
4135 if (sender_ident == NULL) sender_ident = originator_login;
4136 else if (sender_ident[0] == 0) sender_ident = NULL;
4138 /* Handle the -brw option, which is for checking out rewriting rules. Cause log
4139 writes (on errors) to go to stderr instead. Can't do this earlier, as want the
4140 originator_* variables set. */
4142 if (test_rewrite_arg >= 0)
4144 really_exim = FALSE;
4145 if (test_rewrite_arg >= argc)
4147 printf("-brw needs an address argument\n");
4148 exim_exit(EXIT_FAILURE);
4150 rewrite_test(argv[test_rewrite_arg]);
4151 exim_exit(EXIT_SUCCESS);
4154 /* A locally-supplied message is considered to be coming from a local user
4155 unless a trusted caller supplies a sender address with -f, or is passing in the
4156 message via SMTP (inetd invocation or otherwise). */
4158 if ((sender_address == NULL && !smtp_input) ||
4159 (!trusted_caller && filter_test == FTEST_NONE))
4161 sender_local = TRUE;
4163 /* A trusted caller can supply authenticated_sender and authenticated_id
4164 via -oMas and -oMai and if so, they will already be set. Otherwise, force
4165 defaults except when host checking. */
4167 if (authenticated_sender == NULL && !host_checking)
4168 authenticated_sender = string_sprintf("%s@%s", originator_login,
4169 qualify_domain_sender);
4170 if (authenticated_id == NULL && !host_checking)
4171 authenticated_id = originator_login;
4174 /* Trusted callers are always permitted to specify the sender address.
4175 Untrusted callers may specify it if it matches untrusted_set_sender, or if what
4176 is specified is the empty address. However, if a trusted caller does not
4177 specify a sender address for SMTP input, we leave sender_address unset. This
4178 causes the MAIL commands to be honoured. */
4180 if ((!smtp_input && sender_address == NULL) ||
4181 !receive_check_set_sender(sender_address))
4183 /* Either the caller is not permitted to set a general sender, or this is
4184 non-SMTP input and the trusted caller has not set a sender. If there is no
4185 sender, or if a sender other than <> is set, override with the originator's
4186 login (which will get qualified below), except when checking things. */
4188 if (sender_address == NULL /* No sender_address set */
4190 (sender_address[0] != 0 && /* Non-empty sender address, AND */
4191 !checking && /* Not running tests, AND */
4192 filter_test == FTEST_NONE)) /* Not testing a filter */
4194 sender_address = originator_login;
4195 sender_address_forced = FALSE;
4196 sender_address_domain = 0;
4200 /* Remember whether an untrusted caller set the sender address */
4202 sender_set_untrusted = sender_address != originator_login && !trusted_caller;
4204 /* Ensure that the sender address is fully qualified unless it is the empty
4205 address, which indicates an error message, or doesn't exist (root caller, smtp
4206 interface, no -f argument). */
4208 if (sender_address != NULL && sender_address[0] != 0 &&
4209 sender_address_domain == 0)
4210 sender_address = string_sprintf("%s@%s", local_part_quote(sender_address),
4211 qualify_domain_sender);
4213 DEBUG(D_receive) debug_printf("sender address = %s\n", sender_address);
4215 /* Handle a request to verify a list of addresses, or test them for delivery.
4216 This must follow the setting of the sender address, since routers can be
4217 predicated upon the sender. If no arguments are given, read addresses from
4218 stdin. Set debug_level to at least D_v to get full output for address testing.
4221 if (verify_address_mode || address_test_mode)
4224 int flags = vopt_qualify;
4226 if (verify_address_mode)
4228 if (!verify_as_sender) flags |= vopt_is_recipient;
4229 DEBUG(D_verify) debug_print_ids(US"Verifying:");
4234 flags |= vopt_is_recipient;
4235 debug_selector |= D_v;
4236 debug_file = stderr;
4237 debug_fd = fileno(debug_file);
4238 DEBUG(D_verify) debug_print_ids(US"Address testing:");
4241 if (recipients_arg < argc)
4243 while (recipients_arg < argc)
4245 uschar *s = argv[recipients_arg++];
4248 BOOL finished = FALSE;
4249 uschar *ss = parse_find_address_end(s, FALSE);
4250 if (*ss == ',') *ss = 0; else finished = TRUE;
4251 test_address(s, flags, &exit_value);
4254 while (*(++s) != 0 && (*s == ',' || isspace(*s)));
4261 uschar *s = get_stdinput(NULL, NULL);
4262 if (s == NULL) break;
4263 test_address(s, flags, &exit_value);
4267 exim_exit(exit_value);
4270 /* Handle expansion checking. Either expand items on the command line, or read
4271 from stdin if there aren't any. If -Mset was specified, load the message so
4272 that its variables can be used, but restrict this facility to admin users.
4273 Otherwise, if -bem was used, read a message from stdin. */
4277 if (msg_action_arg > 0 && msg_action == MSG_LOAD)
4279 uschar spoolname[256]; /* Not big_buffer; used in spool_read_header() */
4282 fprintf(stderr, "exim: permission denied\n");
4285 message_id = argv[msg_action_arg];
4286 (void)string_format(spoolname, sizeof(spoolname), "%s-H", message_id);
4287 if (!spool_open_datafile(message_id))
4288 printf ("Failed to load message datafile %s\n", message_id);
4289 if (spool_read_header(spoolname, TRUE, FALSE) != spool_read_OK)
4290 printf ("Failed to load message %s\n", message_id);
4293 /* Read a test message from a file. We fudge it up to be on stdin, saving
4294 stdin itself for later reading of expansion strings. */
4296 else if (expansion_test_message != NULL)
4298 int save_stdin = dup(0);
4299 int fd = Uopen(expansion_test_message, O_RDONLY, 0);
4302 fprintf(stderr, "exim: failed to open %s: %s\n", expansion_test_message,
4304 return EXIT_FAILURE;
4307 filter_test = FTEST_USER; /* Fudge to make it look like filter test */
4308 message_ended = END_NOTENDED;
4309 read_message_body(receive_msg(extract_recipients));
4310 message_linecount += body_linecount;
4311 (void)dup2(save_stdin, 0);
4312 (void)close(save_stdin);
4313 clearerr(stdin); /* Required by Darwin */
4316 /* Allow $recipients for this testing */
4318 enable_dollar_recipients = TRUE;
4320 /* Expand command line items */
4322 if (recipients_arg < argc)
4324 while (recipients_arg < argc)
4326 uschar *s = argv[recipients_arg++];
4327 uschar *ss = expand_string(s);
4328 if (ss == NULL) printf ("Failed: %s\n", expand_string_message);
4329 else printf("%s\n", CS ss);
4337 char *(*fn_readline)(char *) = NULL;
4338 char *(*fn_addhist)(char *) = NULL;
4341 void *dlhandle = set_readline(&fn_readline, &fn_addhist);
4347 uschar *source = get_stdinput(fn_readline, fn_addhist);
4348 if (source == NULL) break;
4349 ss = expand_string(source);
4351 printf ("Failed: %s\n", expand_string_message);
4352 else printf("%s\n", CS ss);
4356 if (dlhandle != NULL) dlclose(dlhandle);
4360 /* The data file will be open after -Mset */
4362 if (deliver_datafile >= 0)
4364 (void)close(deliver_datafile);
4365 deliver_datafile = -1;
4368 exim_exit(EXIT_SUCCESS);
4372 /* The active host name is normally the primary host name, but it can be varied
4373 for hosts that want to play several parts at once. We need to ensure that it is
4374 set for host checking, and for receiving messages. */
4376 smtp_active_hostname = primary_hostname;
4377 if (raw_active_hostname != NULL)
4379 uschar *nah = expand_string(raw_active_hostname);
4382 if (!expand_string_forcedfail)
4383 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to expand \"%s\" "
4384 "(smtp_active_hostname): %s", raw_active_hostname,
4385 expand_string_message);
4387 else if (nah[0] != 0) smtp_active_hostname = nah;
4390 /* Handle host checking: this facility mocks up an incoming SMTP call from a
4391 given IP address so that the blocking and relay configuration can be tested.
4392 Unless a sender_ident was set by -oMt, we discard it (the default is the
4393 caller's login name). An RFC 1413 call is made only if we are running in the
4394 test harness and an incoming interface and both ports are specified, because
4395 there is no TCP/IP call to find the ident for. */
4402 if (!sender_ident_set)
4404 sender_ident = NULL;
4405 if (running_in_test_harness && sender_host_port != 0 &&
4406 interface_address != NULL && interface_port != 0)
4407 verify_get_ident(1413);
4410 /* In case the given address is a non-canonical IPv6 address, canonicize
4411 it. The code works for both IPv4 and IPv6, as it happens. */
4413 size = host_aton(sender_host_address, x);
4414 sender_host_address = store_get(48); /* large enough for full IPv6 */
4415 (void)host_nmtoa(size, x, -1, sender_host_address, ':');
4417 /* Now set up for testing */
4419 host_build_sender_fullhost();
4423 sender_local = FALSE;
4424 sender_host_notsocket = TRUE;
4425 debug_file = stderr;
4426 debug_fd = fileno(debug_file);
4427 fprintf(stdout, "\n**** SMTP testing session as if from host %s\n"
4428 "**** but without any ident (RFC 1413) callback.\n"
4429 "**** This is not for real!\n\n",
4430 sender_host_address);
4432 if (verify_check_host(&hosts_connection_nolog) == OK)
4433 log_write_selector &= ~L_smtp_connection;
4434 log_write(L_smtp_connection, LOG_MAIN, "%s", smtp_get_connection_info());
4436 /* NOTE: We do *not* call smtp_log_no_mail() if smtp_start_session() fails,
4437 because a log line has already been written for all its failure exists
4438 (usually "connection refused: <reason>") and writing another one is
4439 unnecessary clutter. */
4441 if (smtp_start_session())
4443 reset_point = store_get(0);
4446 store_reset(reset_point);
4447 if (smtp_setup_msg() <= 0) break;
4448 if (!receive_msg(FALSE)) break;
4452 exim_exit(EXIT_SUCCESS);
4456 /* Arrange for message reception if recipients or SMTP were specified;
4457 otherwise complain unless a version print (-bV) happened or this is a filter
4458 verification test. In the former case, show the configuration file name. */
4460 if (recipients_arg >= argc && !extract_recipients && !smtp_input)
4462 if (version_printed)
4464 printf("Configuration file is %s\n", config_main_filename);
4465 return EXIT_SUCCESS;
4468 if (filter_test == FTEST_NONE)
4469 exim_usage(called_as);
4473 /* If mua_wrapper is set, Exim is being used to turn an MUA that submits on the
4474 standard input into an MUA that submits to a smarthost over TCP/IP. We know
4475 that we are not called from inetd, because that is rejected above. The
4476 following configuration settings are forced here:
4478 (1) Synchronous delivery (-odi)
4479 (2) Errors to stderr (-oep == -oeq)
4480 (3) No parallel remote delivery
4481 (4) Unprivileged delivery
4483 We don't force overall queueing options because there are several of them;
4484 instead, queueing is avoided below when mua_wrapper is set. However, we do need
4485 to override any SMTP queueing. */
4489 synchronous_delivery = TRUE;
4490 arg_error_handling = ERRORS_STDERR;
4491 remote_max_parallel = 1;
4492 deliver_drop_privilege = TRUE;
4494 queue_smtp_domains = NULL;
4498 /* Prepare to accept one or more new messages on the standard input. When a
4499 message has been read, its id is returned in message_id[]. If doing immediate
4500 delivery, we fork a delivery process for each received message, except for the
4501 last one, where we can save a process switch.
4503 It is only in non-smtp mode that error_handling is allowed to be changed from
4504 its default of ERRORS_SENDER by argument. (Idle thought: are any of the
4505 sendmail error modes other than -oem ever actually used? Later: yes.) */
4507 if (!smtp_input) error_handling = arg_error_handling;
4509 /* If this is an inetd call, ensure that stderr is closed to prevent panic
4510 logging being sent down the socket and make an identd call to get the
4515 (void)fclose(stderr);
4516 exim_nullstd(); /* Re-open to /dev/null */
4517 verify_get_ident(IDENT_PORT);
4518 host_build_sender_fullhost();
4519 set_process_info("handling incoming connection from %s via inetd",
4523 /* If the sender host address has been set, build sender_fullhost if it hasn't
4524 already been done (which it will have been for inetd). This caters for the
4525 case when it is forced by -oMa. However, we must flag that it isn't a socket,
4526 so that the test for IP options is skipped for -bs input. */
4528 if (sender_host_address != NULL && sender_fullhost == NULL)
4530 host_build_sender_fullhost();
4531 set_process_info("handling incoming connection from %s via -oMa",
4533 sender_host_notsocket = TRUE;
4536 /* Otherwise, set the sender host as unknown except for inetd calls. This
4537 prevents host checking in the case of -bs not from inetd and also for -bS. */
4539 else if (!is_inetd) sender_host_unknown = TRUE;
4541 /* If stdout does not exist, then dup stdin to stdout. This can happen
4542 if exim is started from inetd. In this case fd 0 will be set to the socket,
4543 but fd 1 will not be set. This also happens for passed SMTP channels. */
4545 if (fstat(1, &statbuf) < 0) (void)dup2(0, 1);
4547 /* Set up the incoming protocol name and the state of the program. Root is
4548 allowed to force received protocol via the -oMr option above. If we have come
4549 via inetd, the process info has already been set up. We don't set
4550 received_protocol here for smtp input, as it varies according to
4551 batch/HELO/EHLO/AUTH/TLS. */
4555 if (!is_inetd) set_process_info("accepting a local %sSMTP message from <%s>",
4556 smtp_batched_input? "batched " : "",
4557 (sender_address!= NULL)? sender_address : originator_login);
4561 if (received_protocol == NULL)
4562 received_protocol = string_sprintf("local%s", called_as);
4563 set_process_info("accepting a local non-SMTP message from <%s>",
4567 /* Initialize the session_local_queue-only flag (this will be ignored if
4568 mua_wrapper is set) */
4571 session_local_queue_only = queue_only;
4573 /* For non-SMTP and for batched SMTP input, check that there is enough space on
4574 the spool if so configured. On failure, we must not attempt to send an error
4575 message! (For interactive SMTP, the check happens at MAIL FROM and an SMTP
4576 error code is given.) */
4578 if ((!smtp_input || smtp_batched_input) && !receive_check_fs(0))
4580 fprintf(stderr, "exim: insufficient disk space\n");
4581 return EXIT_FAILURE;
4584 /* If this is smtp input of any kind, real or batched, handle the start of the
4587 NOTE: We do *not* call smtp_log_no_mail() if smtp_start_session() fails,
4588 because a log line has already been written for all its failure exists
4589 (usually "connection refused: <reason>") and writing another one is
4590 unnecessary clutter. */
4596 if (verify_check_host(&hosts_connection_nolog) == OK)
4597 log_write_selector &= ~L_smtp_connection;
4598 log_write(L_smtp_connection, LOG_MAIN, "%s", smtp_get_connection_info());
4599 if (!smtp_start_session())
4602 exim_exit(EXIT_SUCCESS);
4606 /* Otherwise, set up the input size limit here. */
4610 thismessage_size_limit = expand_string_integer(message_size_limit, TRUE);
4611 if (expand_string_message != NULL)
4613 if (thismessage_size_limit == -1)
4614 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to expand "
4615 "message_size_limit: %s", expand_string_message);
4617 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "invalid value for "
4618 "message_size_limit: %s", expand_string_message);
4622 /* Loop for several messages when reading SMTP input. If we fork any child
4623 processes, we don't want to wait for them unless synchronous delivery is
4624 requested, so set SIGCHLD to SIG_IGN in that case. This is not necessarily the
4625 same as SIG_DFL, despite the fact that documentation often lists the default as
4626 "ignore". This is a confusing area. This is what I know:
4628 At least on some systems (e.g. Solaris), just setting SIG_IGN causes child
4629 processes that complete simply to go away without ever becoming defunct. You
4630 can't then wait for them - but we don't want to wait for them in the
4631 non-synchronous delivery case. However, this behaviour of SIG_IGN doesn't
4632 happen for all OS (e.g. *BSD is different).
4634 But that's not the end of the story. Some (many? all?) systems have the
4635 SA_NOCLDWAIT option for sigaction(). This requests the behaviour that Solaris
4636 has by default, so it seems that the difference is merely one of default
4637 (compare restarting vs non-restarting signals).
4639 To cover all cases, Exim sets SIG_IGN with SA_NOCLDWAIT here if it can. If not,
4640 it just sets SIG_IGN. To be on the safe side it also calls waitpid() at the end
4641 of the loop below. Paranoia rules.
4643 February 2003: That's *still* not the end of the story. There are now versions
4644 of Linux (where SIG_IGN does work) that are picky. If, having set SIG_IGN, a
4645 process then calls waitpid(), a grumble is written to the system log, because
4646 this is logically inconsistent. In other words, it doesn't like the paranoia.
4647 As a consequenc of this, the waitpid() below is now excluded if we are sure
4648 that SIG_IGN works. */
4650 if (!synchronous_delivery)
4653 struct sigaction act;
4654 act.sa_handler = SIG_IGN;
4655 sigemptyset(&(act.sa_mask));
4656 act.sa_flags = SA_NOCLDWAIT;
4657 sigaction(SIGCHLD, &act, NULL);
4659 signal(SIGCHLD, SIG_IGN);
4663 /* Save the current store pool point, for resetting at the start of
4664 each message, and save the real sender address, if any. */
4666 reset_point = store_get(0);
4667 real_sender_address = sender_address;
4669 /* Loop to receive messages; receive_msg() returns TRUE if there are more
4670 messages to be read (SMTP input), or FALSE otherwise (not SMTP, or SMTP channel
4675 store_reset(reset_point);
4678 /* Handle the SMTP case; call smtp_setup_mst() to deal with the initial SMTP
4679 input and build the recipients list, before calling receive_msg() to read the
4680 message proper. Whatever sender address is given in the SMTP transaction is
4681 often ignored for local senders - we use the actual sender, which is normally
4682 either the underlying user running this process or a -f argument provided by
4683 a trusted caller. It is saved in real_sender_address. The test for whether to
4684 accept the SMTP sender is encapsulated in receive_check_set_sender(). */
4689 if ((rc = smtp_setup_msg()) > 0)
4691 if (real_sender_address != NULL &&
4692 !receive_check_set_sender(sender_address))
4694 sender_address = raw_sender = real_sender_address;
4695 sender_address_unrewritten = NULL;
4698 /* For batched SMTP, we have to run the acl_not_smtp_start ACL, since it
4699 isn't really SMTP, so no other ACL will run until the acl_not_smtp one at
4700 the very end. The result of the ACL is ignored (as for other non-SMTP
4701 messages). It is run for its potential side effects. */
4703 if (smtp_batched_input && acl_not_smtp_start != NULL)
4705 uschar *user_msg, *log_msg;
4706 enable_dollar_recipients = TRUE;
4707 (void)acl_check(ACL_WHERE_NOTSMTP_START, NULL, acl_not_smtp_start,
4708 &user_msg, &log_msg);
4709 enable_dollar_recipients = FALSE;
4712 /* Now get the data for the message */
4714 more = receive_msg(extract_recipients);
4715 if (message_id[0] == 0)
4718 smtp_log_no_mail(); /* Log no mail if configured */
4719 exim_exit(EXIT_FAILURE);
4724 smtp_log_no_mail(); /* Log no mail if configured */
4725 exim_exit((rc == 0)? EXIT_SUCCESS : EXIT_FAILURE);
4729 /* In the non-SMTP case, we have all the information from the command
4730 line, but must process it in case it is in the more general RFC822
4731 format, and in any case, to detect syntax errors. Also, it appears that
4732 the use of comma-separated lists as single arguments is common, so we
4733 had better support them. */
4739 int count = argc - recipients_arg;
4740 uschar **list = argv + recipients_arg;
4742 /* These options cannot be changed dynamically for non-SMTP messages */
4744 active_local_sender_retain = local_sender_retain;
4745 active_local_from_check = local_from_check;
4747 /* Save before any rewriting */
4749 raw_sender = string_copy(sender_address);
4751 /* Loop for each argument */
4753 for (i = 0; i < count; i++)
4755 int start, end, domain;
4757 uschar *s = list[i];
4759 /* Loop for each comma-separated address */
4763 BOOL finished = FALSE;
4765 uschar *ss = parse_find_address_end(s, FALSE);
4767 if (*ss == ',') *ss = 0; else finished = TRUE;
4769 /* Check max recipients - if -t was used, these aren't recipients */
4771 if (recipients_max > 0 && ++rcount > recipients_max &&
4772 !extract_recipients)
4774 if (error_handling == ERRORS_STDERR)
4776 fprintf(stderr, "exim: too many recipients\n");
4777 exim_exit(EXIT_FAILURE);
4782 moan_to_sender(ERRMESS_TOOMANYRECIP, NULL, NULL, stdin, TRUE)?
4783 errors_sender_rc : EXIT_FAILURE;
4788 parse_extract_address(s, &errmess, &start, &end, &domain, FALSE);
4790 if (domain == 0 && !allow_unqualified_recipient)
4793 errmess = US"unqualified recipient address not allowed";
4796 if (recipient == NULL)
4798 if (error_handling == ERRORS_STDERR)
4800 fprintf(stderr, "exim: bad recipient address \"%s\": %s\n",
4801 string_printing(list[i]), errmess);
4802 exim_exit(EXIT_FAILURE);
4808 eblock.text1 = string_printing(list[i]);
4809 eblock.text2 = errmess;
4811 moan_to_sender(ERRMESS_BADARGADDRESS, &eblock, NULL, stdin, TRUE)?
4812 errors_sender_rc : EXIT_FAILURE;
4816 receive_add_recipient(recipient, -1);
4819 while (*(++s) != 0 && (*s == ',' || isspace(*s)));
4823 /* Show the recipients when debugging */
4828 if (sender_address != NULL) debug_printf("Sender: %s\n", sender_address);
4829 if (recipients_list != NULL)
4831 debug_printf("Recipients:\n");
4832 for (i = 0; i < recipients_count; i++)
4833 debug_printf(" %s\n", recipients_list[i].address);
4837 /* Run the acl_not_smtp_start ACL if required. The result of the ACL is
4838 ignored; rejecting here would just add complication, and it can just as
4839 well be done later. Allow $recipients to be visible in the ACL. */
4841 if (acl_not_smtp_start != NULL)
4843 uschar *user_msg, *log_msg;
4844 enable_dollar_recipients = TRUE;
4845 (void)acl_check(ACL_WHERE_NOTSMTP_START, NULL, acl_not_smtp_start,
4846 &user_msg, &log_msg);
4847 enable_dollar_recipients = FALSE;
4850 /* Read the data for the message. If filter_test is not FTEST_NONE, this
4851 will just read the headers for the message, and not write anything onto the
4854 message_ended = END_NOTENDED;
4855 more = receive_msg(extract_recipients);
4857 /* more is always FALSE here (not SMTP message) when reading a message
4858 for real; when reading the headers of a message for filter testing,
4859 it is TRUE if the headers were terminated by '.' and FALSE otherwise. */
4861 if (message_id[0] == 0) exim_exit(EXIT_FAILURE);
4862 } /* Non-SMTP message reception */
4864 /* If this is a filter testing run, there are headers in store, but
4865 no message on the spool. Run the filtering code in testing mode, setting
4866 the domain to the qualify domain and the local part to the current user,
4867 unless they have been set by options. The prefix and suffix are left unset
4868 unless specified. The the return path is set to to the sender unless it has
4869 already been set from a return-path header in the message. */
4871 if (filter_test != FTEST_NONE)
4873 deliver_domain = (ftest_domain != NULL)?
4874 ftest_domain : qualify_domain_recipient;
4875 deliver_domain_orig = deliver_domain;
4876 deliver_localpart = (ftest_localpart != NULL)?
4877 ftest_localpart : originator_login;
4878 deliver_localpart_orig = deliver_localpart;
4879 deliver_localpart_prefix = ftest_prefix;
4880 deliver_localpart_suffix = ftest_suffix;
4881 deliver_home = originator_home;
4883 if (return_path == NULL)
4885 printf("Return-path copied from sender\n");
4886 return_path = string_copy(sender_address);
4890 printf("Return-path = %s\n", (return_path[0] == 0)? US"<>" : return_path);
4892 printf("Sender = %s\n", (sender_address[0] == 0)? US"<>" : sender_address);
4894 receive_add_recipient(
4895 string_sprintf("%s%s%s@%s",
4896 (ftest_prefix == NULL)? US"" : ftest_prefix,
4898 (ftest_suffix == NULL)? US"" : ftest_suffix,
4899 deliver_domain), -1);
4901 printf("Recipient = %s\n", recipients_list[0].address);
4902 if (ftest_prefix != NULL) printf("Prefix = %s\n", ftest_prefix);
4903 if (ftest_suffix != NULL) printf("Suffix = %s\n", ftest_suffix);
4905 (void)chdir("/"); /* Get away from wherever the user is running this from */
4907 /* Now we run either a system filter test, or a user filter test, or both.
4908 In the latter case, headers added by the system filter will persist and be
4909 available to the user filter. We need to copy the filter variables
4912 if ((filter_test & FTEST_SYSTEM) != 0)
4914 if (!filter_runtest(filter_sfd, filter_test_sfile, TRUE, more))
4915 exim_exit(EXIT_FAILURE);
4918 memcpy(filter_sn, filter_n, sizeof(filter_sn));
4920 if ((filter_test & FTEST_USER) != 0)
4922 if (!filter_runtest(filter_ufd, filter_test_ufile, FALSE, more))
4923 exim_exit(EXIT_FAILURE);
4926 exim_exit(EXIT_SUCCESS);
4929 /* Else act on the result of message reception. We should not get here unless
4930 message_id[0] is non-zero. If queue_only is set, session_local_queue_only
4931 will be TRUE. If it is not, check on the number of messages received in this
4934 if (!session_local_queue_only &&
4935 smtp_accept_queue_per_connection > 0 &&
4936 receive_messagecount > smtp_accept_queue_per_connection)
4938 session_local_queue_only = TRUE;
4939 queue_only_reason = 2;
4942 /* Initialize local_queue_only from session_local_queue_only. If it is false,
4943 and queue_only_load is set, check that the load average is below it. If it is
4944 not, set local_queue_only TRUE. If queue_only_load_latch is true (the
4945 default), we put the whole session into queue_only mode. It then remains this
4946 way for any subsequent messages on the same SMTP connection. This is a
4947 deliberate choice; even though the load average may fall, it doesn't seem
4948 right to deliver later messages on the same call when not delivering earlier
4949 ones. However, there are odd cases where this is not wanted, so this can be
4950 changed by setting queue_only_load_latch false. */
4952 local_queue_only = session_local_queue_only;
4953 if (!local_queue_only && queue_only_load >= 0)
4955 local_queue_only = (load_average = OS_GETLOADAVG()) > queue_only_load;
4956 if (local_queue_only)
4958 queue_only_reason = 3;
4959 if (queue_only_load_latch) session_local_queue_only = TRUE;
4963 /* If running as an MUA wrapper, all queueing options and freezing options
4967 local_queue_only = queue_only_policy = deliver_freeze = FALSE;
4969 /* Log the queueing here, when it will get a message id attached, but
4970 not if queue_only is set (case 0). Case 1 doesn't happen here (too many
4973 if (local_queue_only) switch(queue_only_reason)
4976 log_write(L_delay_delivery,
4977 LOG_MAIN, "no immediate delivery: more than %d messages "
4978 "received in one connection", smtp_accept_queue_per_connection);
4982 log_write(L_delay_delivery,
4983 LOG_MAIN, "no immediate delivery: load average %.2f",
4984 (double)load_average/1000.0);
4988 /* Else do the delivery unless the ACL or local_scan() called for queue only
4989 or froze the message. Always deliver in a separate process. A fork failure is
4990 not a disaster, as the delivery will eventually happen on a subsequent queue
4991 run. The search cache must be tidied before the fork, as the parent will
4992 do it before exiting. The child will trigger a lookup failure and
4993 thereby defer the delivery if it tries to use (for example) a cached ldap
4994 connection that the parent has called unbind on. */
4996 else if (!queue_only_policy && !deliver_freeze)
5001 if ((pid = fork()) == 0)
5004 close_unwanted(); /* Close unwanted file descriptors and TLS */
5005 exim_nullstd(); /* Ensure std{in,out,err} exist */
5007 /* Re-exec Exim if we need to regain privilege (note: in mua_wrapper
5008 mode, deliver_drop_privilege is forced TRUE). */
5010 if (geteuid() != root_uid && !deliver_drop_privilege && !unprivileged)
5012 (void)child_exec_exim(CEE_EXEC_EXIT, FALSE, NULL, FALSE, 2, US"-Mc",
5014 /* Control does not return here. */
5017 /* No need to re-exec */
5019 rc = deliver_message(message_id, FALSE, FALSE);
5021 _exit((!mua_wrapper || rc == DELIVER_MUA_SUCCEEDED)?
5022 EXIT_SUCCESS : EXIT_FAILURE);
5027 log_write(0, LOG_MAIN|LOG_PANIC, "failed to fork automatic delivery "
5028 "process: %s", strerror(errno));
5031 /* In the parent, wait if synchronous delivery is required. This will
5032 always be the case in MUA wrapper mode. */
5034 else if (synchronous_delivery)
5037 while (wait(&status) != pid);
5038 if ((status & 0x00ff) != 0)
5039 log_write(0, LOG_MAIN|LOG_PANIC,
5040 "process %d crashed with signal %d while delivering %s",
5041 (int)pid, status & 0x00ff, message_id);
5042 if (mua_wrapper && (status & 0xffff) != 0) exim_exit(EXIT_FAILURE);
5046 /* The loop will repeat if more is TRUE. If we do not know know that the OS
5047 automatically reaps children (see comments above the loop), clear away any
5048 finished subprocesses here, in case there are lots of messages coming in
5049 from the same source. */
5051 #ifndef SIG_IGN_WORKS
5052 while (waitpid(-1, NULL, WNOHANG) > 0);
5056 exim_exit(EXIT_SUCCESS); /* Never returns */
5057 return 0; /* To stop compiler warning */