1 /* $Cambridge: exim/src/src/exim.c,v 1.1 2004/10/07 10:39:01 ph10 Exp $ */
3 /*************************************************
4 * Exim - an Internet mail transport agent *
5 *************************************************/
7 /* Copyright (c) University of Cambridge 1995 - 2004 */
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
201 Argument: an itimerval structure containing the interval
206 milliwait(struct itimerval *itval)
209 sigset_t old_sigmask;
210 (void)sigemptyset(&sigmask); /* Empty mask */
211 (void)sigaddset(&sigmask, SIGALRM); /* Add SIGALRM */
212 (void)sigprocmask(SIG_BLOCK, &sigmask, &old_sigmask); /* Block SIGALRM */
213 (void)setitimer(ITIMER_REAL, itval, NULL); /* Start timer */
214 (void)sigfillset(&sigmask); /* All signals */
215 (void)sigdelset(&sigmask, SIGALRM); /* Remove SIGALRM */
216 (void)sigsuspend(&sigmask); /* Until SIGALRM */
217 (void)sigprocmask(SIG_SETMASK, &old_sigmask, NULL); /* Restore mask */
223 /*************************************************
224 * Millisecond sleep function *
225 *************************************************/
227 /* The basic sleep() function has a granularity of 1 second, which is too rough
228 in some cases - for example, when using an increasing delay to slow down
231 Argument: number of millseconds
238 struct itimerval itval;
239 itval.it_interval.tv_sec = 0;
240 itval.it_interval.tv_usec = 0;
241 itval.it_value.tv_sec = msec/1000;
242 itval.it_value.tv_usec = (msec % 1000) * 1000;
248 /*************************************************
249 * Compare microsecond times *
250 *************************************************/
257 Returns: -1, 0, or +1
261 exim_tvcmp(struct timeval *t1, struct timeval *t2)
263 if (t1->tv_sec > t2->tv_sec) return +1;
264 if (t1->tv_sec < t2->tv_sec) return -1;
265 if (t1->tv_usec > t2->tv_usec) return +1;
266 if (t1->tv_usec < t2->tv_usec) return -1;
273 /*************************************************
274 * Clock tick wait function *
275 *************************************************/
277 /* Exim uses a time + a pid to generate a unique identifier in two places: its
278 message IDs, and in file names for maildir deliveries. Because some OS now
279 re-use pids within the same second, sub-second times are now being used.
280 However, for absolute certaintly, we must ensure the clock has ticked before
281 allowing the relevant process to complete. At the time of implementation of
282 this code (February 2003), the speed of processors is such that the clock will
283 invariably have ticked already by the time a process has done its job. This
284 function prepares for the time when things are faster - and it also copes with
285 clocks that go backwards.
288 then_tv A timeval which was used to create uniqueness; its usec field
289 has been rounded down to the value of the resolution.
290 We want to be sure the current time is greater than this.
291 resolution The resolution that was used to divide the microseconds
292 (1 for maildir, larger for message ids)
298 exim_wait_tick(struct timeval *then_tv, int resolution)
300 struct timeval now_tv;
301 long int now_true_usec;
303 (void)gettimeofday(&now_tv, NULL);
304 now_true_usec = now_tv.tv_usec;
305 now_tv.tv_usec = (now_true_usec/resolution) * resolution;
307 if (exim_tvcmp(&now_tv, then_tv) <= 0)
309 struct itimerval itval;
310 itval.it_interval.tv_sec = 0;
311 itval.it_interval.tv_usec = 0;
312 itval.it_value.tv_sec = then_tv->tv_sec - now_tv.tv_sec;
313 itval.it_value.tv_usec = then_tv->tv_usec + resolution - now_true_usec;
315 /* We know that, overall, "now" is less than or equal to "then". Therefore, a
316 negative value for the microseconds is possible only in the case when "now"
317 is more than a second less than "then". That means that itval.it_value.tv_sec
318 is greater than zero. The following correction is therefore safe. */
320 if (itval.it_value.tv_usec < 0)
322 itval.it_value.tv_usec += 1000000;
323 itval.it_value.tv_sec -= 1;
326 DEBUG(D_transport|D_receive)
328 if (!running_in_test_harness)
330 debug_printf("tick check: %lu.%06lu %lu.%06lu\n",
331 then_tv->tv_sec, then_tv->tv_usec, now_tv.tv_sec, now_tv.tv_usec);
332 debug_printf("waiting %lu.%06lu\n", itval.it_value.tv_sec,
333 itval.it_value.tv_usec);
344 /*************************************************
345 * Set up processing details *
346 *************************************************/
348 /* Save a text string for dumping when SIGUSR1 is received.
349 Do checks for overruns.
351 Arguments: format and arguments, as for printf()
356 set_process_info(char *format, ...)
360 sprintf(CS process_info, "%5d ", (int)getpid());
361 len = Ustrlen(process_info);
362 va_start(ap, format);
363 if (!string_vformat(process_info + len, PROCESS_INFO_SIZE - len, format, ap))
364 Ustrcpy(process_info + len, "**** string overflowed buffer ****");
365 DEBUG(D_process_info) debug_printf("set_process_info: %s\n", process_info);
373 /*************************************************
374 * Ensure stdin, stdout, and stderr exist *
375 *************************************************/
377 /* Some operating systems grumble if an exec() happens without a standard
378 input, output, and error (fds 0, 1, 2) being defined. The worry is that some
379 file will be opened and will use these fd values, and then some other bit of
380 code will assume, for example, that it can write error messages to stderr.
381 This function ensures that fds 0, 1, and 2 are open if they do not already
382 exist, by connecting them to /dev/null.
384 This function is also used to ensure that std{in,out,err} exist at all times,
385 so that if any library that Exim calls tries to use them, it doesn't crash.
397 for (i = 0; i <= 2; i++)
399 if (fstat(i, &statbuf) < 0 && errno == EBADF)
401 if (devnull < 0) devnull = open("/dev/null", O_RDWR);
402 if (devnull < 0) log_write(0, LOG_MAIN|LOG_PANIC_DIE, "%s",
403 string_open_failed(errno, "/dev/null"));
404 if (devnull != i) dup2(devnull, i);
407 if (devnull > 2) close(devnull);
413 /*************************************************
414 * Close unwanted file descriptors for delivery *
415 *************************************************/
417 /* This function is called from a new process that has been forked to deliver
418 an incoming message, either directly, or using exec.
420 We want any smtp input streams to be closed in this new process. However, it
421 has been observed that using fclose() here causes trouble. When reading in -bS
422 input, duplicate copies of messages have been seen. The files will be sharing a
423 file pointer with the parent process, and it seems that fclose() (at least on
424 some systems - I saw this on Solaris 2.5.1) messes with that file pointer, at
425 least sometimes. Hence we go for closing the underlying file descriptors.
427 If TLS is active, we want to shut down the TLS library, but without molesting
428 the parent's SSL connection.
430 For delivery of a non-SMTP message, we want to close stdin and stdout (and
431 stderr unless debugging) because the calling process might have set them up as
432 pipes and be waiting for them to close before it waits for the submission
433 process to terminate. If they aren't closed, they hold up the calling process
434 until the initial delivery process finishes, which is not what we want.
436 Exception: We do want it for synchronous delivery!
438 And notwithstanding all the above, if D_resolver is set, implying resolver
439 debugging, leave stdout open, because that's where the resolver writes its
442 When we close stderr (which implies we've also closed stdout), we also get rid
443 of any controlling terminal.
455 tls_close(FALSE); /* Shut down the TLS library */
457 close(fileno(smtp_in));
458 close(fileno(smtp_out));
463 close(0); /* stdin */
464 if ((debug_selector & D_resolver) == 0) close(1); /* stdout */
465 if (debug_selector == 0) /* stderr */
467 if (!synchronous_delivery)
480 /*************************************************
482 *************************************************/
484 /* This function sets a new uid and gid permanently, optionally calling
485 initgroups() to set auxiliary groups. There are some special cases when running
486 Exim in unprivileged modes. In these situations the effective uid will not be
487 root; if we already have the right effective uid/gid, and don't need to
488 initialize any groups, leave things as they are.
493 igflag TRUE if initgroups() wanted
494 msg text to use in debugging output and failure log
496 Returns: nothing; bombs out on failure
500 exim_setugid(uid_t uid, gid_t gid, BOOL igflag, uschar *msg)
502 uid_t euid = geteuid();
503 gid_t egid = getegid();
505 if (euid == root_uid || euid != uid || egid != gid || igflag)
507 /* At least one OS returns +1 for initgroups failure, so just check for
512 struct passwd *pw = getpwuid(uid);
515 if (initgroups(pw->pw_name, gid) != 0)
516 log_write(0,LOG_MAIN|LOG_PANIC_DIE,"initgroups failed for uid=%ld: %s",
517 (long int)uid, strerror(errno));
519 else log_write(0, LOG_MAIN|LOG_PANIC_DIE, "cannot run initgroups(): "
520 "no passwd entry for uid=%ld", (long int)uid);
523 if (setgid(gid) < 0 || setuid(uid) < 0)
525 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "unable to set gid=%ld or uid=%ld "
526 "(euid=%ld): %s", (long int)gid, (long int)uid, (long int)euid, msg);
530 /* Debugging output included uid/gid and all groups */
535 gid_t group_list[NGROUPS_MAX];
536 debug_printf("changed uid/gid: %s\n uid=%ld gid=%ld pid=%ld\n", msg,
537 (long int)geteuid(), (long int)getegid(), (long int)getpid());
538 group_count = getgroups(NGROUPS_MAX, group_list);
539 debug_printf(" auxiliary group list:");
543 for (i = 0; i < group_count; i++) debug_printf(" %d", (int)group_list[i]);
545 else debug_printf(" <none>");
553 /*************************************************
555 *************************************************/
557 /* Exim exits via this function so that it always clears up any open
563 Returns: does not return
571 debug_printf(">>>>>>>>>>>>>>>> Exim pid=%d terminating with rc=%d "
572 ">>>>>>>>>>>>>>>>\n", (int)getpid(), rc);
579 /*************************************************
580 * Extract port from host address *
581 *************************************************/
583 /* Called to extract the port from the values given to -oMa and -oMi.
584 It also checks the syntax of the address.
587 address the address, with possible port on the end
589 Returns: the port, or zero if there isn't one
590 bombs out on a syntax error
594 check_port(uschar *address)
596 int port = host_extract_port(address);
597 if (!string_is_ip_address(address, NULL))
599 fprintf(stderr, "exim abandoned: \"%s\" is not an IP address\n", address);
607 /*************************************************
608 * Test/verify an address *
609 *************************************************/
611 /* This function is called by the -bv and -bt code. It extracts a working
612 address from a full RFC 822 address. This isn't really necessary per se, but it
613 has the effect of collapsing source routes.
617 flags flag bits for verify_address()
618 exit_value to be set for failures
624 test_address(uschar *s, int flags, int *exit_value)
626 int start, end, domain;
627 uschar *parse_error = NULL;
628 uschar *address = parse_extract_address(s, &parse_error, &start, &end, &domain,
632 fprintf(stdout, "syntax error: %s\n", parse_error);
637 int rc = verify_address(deliver_make_addr(address,TRUE), stdout, flags, -1,
638 -1, NULL, NULL, NULL);
639 if (rc == FAIL) *exit_value = 2;
640 else if (rc == DEFER && *exit_value == 0) *exit_value = 1;
646 /*************************************************
647 * Decode bit settings for log/debug *
648 *************************************************/
650 /* This function decodes a string containing bit settings in the form of +name
651 and/or -name sequences, and sets/unsets bits in a bit string accordingly. It
652 also recognizes a numeric setting of the form =<number>, but this is not
653 intended for user use. It's an easy way for Exim to pass the debug settings
654 when it is re-exec'ed.
656 The log options are held in two unsigned ints (because there became too many
657 for one). The top bit in the table means "put in 2nd selector". This does not
658 yet apply to debug options, so the "=" facility sets only the first selector.
660 A bad value for a debug setting is treated as an unknown option - error message
661 to stderr and die. For log settings, which come from the configuration file,
662 we write to the log on the way out...
665 selector1 address of the first bit string
666 selector2 address of the second bit string, or NULL
667 string the configured string
668 options the table of option names
670 which "log" or "debug"
672 Returns: nothing on success - bomb out on failure
676 decode_bits(unsigned int *selector1, unsigned int *selector2, uschar *string,
677 bit_table *options, int count, uschar *which)
680 if (string == NULL) return;
684 char *end; /* Not uschar */
685 *selector1 = strtoul(CS string+1, &end, 0);
686 if (*end == 0) return;
687 errmsg = string_sprintf("malformed numeric %s_selector setting: %s", which,
692 /* Handle symbolic setting */
699 bit_table *start, *end;
701 while (isspace(*string)) string++;
702 if (*string == 0) return;
704 if (*string != '+' && *string != '-')
706 errmsg = string_sprintf("malformed %s_selector setting: "
707 "+ or - expected but found \"%s\"", which, string);
711 adding = *string++ == '+';
713 while (isalnum(*string) || *string == '_') string++;
717 end = options + count;
721 bit_table *middle = start + (end - start)/2;
722 int c = Ustrncmp(s, middle->name, len);
725 if (middle->name[len] != 0) c = -1; else
727 unsigned int bit = middle->bit;
728 unsigned int *selector;
730 /* The value with all bits set means "set all bits in both selectors"
731 in the case where two are being handled. However, the top bit in the
732 second selector is never set. */
734 if (bit == 0xffffffff)
736 *selector1 = adding? bit : 0;
737 if (selector2 != NULL) *selector2 = adding? 0x7fffffff : 0;
740 /* Otherwise, the 0x80000000 bit means "this value, without the top
741 bit, belongs in the second selector". */
745 if ((bit & 0x80000000) != 0)
747 selector = selector2;
750 else selector = selector1;
751 if (adding) *selector |= bit; else *selector &= ~bit;
753 break; /* Out of loop to match selector name */
756 if (c < 0) end = middle; else start = middle + 1;
757 } /* Loop to match selector name */
761 errmsg = string_sprintf("unknown %s_selector setting: %c%.*s", which,
762 adding? '+' : '-', len, s);
765 } /* Loop for selector names */
767 /* Handle disasters */
770 if (Ustrcmp(which, "debug") == 0)
772 fprintf(stderr, "exim: %s\n", errmsg);
775 else log_write(0, LOG_CONFIG|LOG_PANIC_DIE, "%s", errmsg);
780 /*************************************************
781 * Show supported features *
782 *************************************************/
784 /* This function is called for -bV and for -d to output the optional features
785 of the current Exim binary.
787 Arguments: a FILE for printing
792 show_whats_supported(FILE *f)
794 #ifdef DB_VERSION_STRING
795 fprintf(f, "Berkeley DB: %s\n", DB_VERSION_STRING);
796 #elif defined(BTREEVERSION) && defined(HASHVERSION)
798 fprintf(f, "Probably Berkeley DB version 1.8x (native mode)\n");
800 fprintf(f, "Probably Berkeley DB version 1.8x (compatibility mode)\n");
802 #elif defined(_DBM_RDONLY) || defined(dbm_dirfno)
803 fprintf(f, "Probably ndbm\n");
804 #elif defined(USE_TDB)
805 fprintf(f, "Using tdb\n");
808 fprintf(f, "Probably GDBM (native mode)\n");
810 fprintf(f, "Probably GDBM (compatibility mode)\n");
814 fprintf(f, "Support for:");
816 fprintf(f, " iconv()");
827 #ifdef USE_TCP_WRAPPERS
828 fprintf(f, " TCPwrappers");
832 fprintf(f, " GnuTLS");
834 fprintf(f, " OpenSSL");
839 fprintf(f, "Lookups:");
840 #ifdef LOOKUP_LSEARCH
841 fprintf(f, " lsearch wildlsearch nwildlsearch iplsearch");
847 fprintf(f, " dbm dbmnz");
850 fprintf(f, " dnsdb");
852 #ifdef LOOKUP_DSEARCH
853 fprintf(f, " dsearch");
856 fprintf(f, " ibase");
859 fprintf(f, " ldap ldapdn ldapm");
862 fprintf(f, " mysql");
865 fprintf(f, " nis nis0");
867 #ifdef LOOKUP_NISPLUS
868 fprintf(f, " nisplus");
871 fprintf(f, " oracle");
874 fprintf(f, " passwd");
877 fprintf(f, " pgsql");
880 fprintf(f, " testdb");
883 fprintf(f, " whoson");
887 fprintf(f, "Authenticators:");
889 fprintf(f, " cram_md5");
891 #ifdef AUTH_CYRUS_SASL
892 fprintf(f, " cyrus_sasl");
894 #ifdef AUTH_PLAINTEXT
895 fprintf(f, " plaintext");
902 fprintf(f, "Routers:");
904 fprintf(f, " accept");
906 #ifdef ROUTER_DNSLOOKUP
907 fprintf(f, " dnslookup");
909 #ifdef ROUTER_IPLITERAL
910 fprintf(f, " ipliteral");
912 #ifdef ROUTER_IPLOOKUP
913 fprintf(f, " iplookup");
915 #ifdef ROUTER_MANUALROUTE
916 fprintf(f, " manualroute");
918 #ifdef ROUTER_QUERYPROGRAM
919 fprintf(f, " queryprogram");
921 #ifdef ROUTER_REDIRECT
922 fprintf(f, " redirect");
926 fprintf(f, "Transports:");
927 #ifdef TRANSPORT_APPENDFILE
928 fprintf(f, " appendfile");
929 #ifdef SUPPORT_MAILDIR
930 fprintf(f, "/maildir");
932 #ifdef SUPPORT_MAILSTORE
933 fprintf(f, "/mailstore");
939 #ifdef TRANSPORT_AUTOREPLY
940 fprintf(f, " autoreply");
942 #ifdef TRANSPORT_LMTP
945 #ifdef TRANSPORT_PIPE
948 #ifdef TRANSPORT_SMTP
953 if (fixed_never_users[0] > 0)
956 fprintf(f, "Fixed never_users: ");
957 for (i = 1; i <= (int)fixed_never_users[0] - 1; i++)
958 fprintf(f, "%d:", (unsigned int)fixed_never_users[i]);
959 fprintf(f, "%d\n", (unsigned int)fixed_never_users[i]);
966 /*************************************************
967 * Quote a local part *
968 *************************************************/
970 /* This function is used when a sender address or a From: or Sender: header
971 line is being created from the caller's login, or from an authenticated_id. It
972 applies appropriate quoting rules for a local part.
974 Argument: the local part
975 Returns: the local part, quoted if necessary
979 local_part_quote(uschar *lpart)
981 BOOL needs_quote = FALSE;
986 for (t = lpart; !needs_quote && *t != 0; t++)
988 needs_quote = !isalnum(*t) && strchr("!#$%&'*+-/=?^_`{|}~", *t) == NULL &&
989 (*t != '.' || t == lpart || t[1] == 0);
992 if (!needs_quote) return lpart;
995 yield = string_cat(NULL, &size, &ptr, US"\"", 1);
999 uschar *nq = US Ustrpbrk(lpart, "\\\"");
1002 yield = string_cat(yield, &size, &ptr, lpart, Ustrlen(lpart));
1005 yield = string_cat(yield, &size, &ptr, lpart, nq - lpart);
1006 yield = string_cat(yield, &size, &ptr, US"\\", 1);
1007 yield = string_cat(yield, &size, &ptr, nq, 1);
1011 yield = string_cat(yield, &size, &ptr, US"\"", 1);
1019 /*************************************************
1020 * Load readline() functions *
1021 *************************************************/
1023 /* This function is called from testing executions that read data from stdin,
1024 but only when running as the calling user. Currently, only -be does this. The
1025 function loads the readline() function library and passes back the functions.
1026 On some systems, it needs the curses library, so load that too, but try without
1027 it if loading fails. All this functionality has to be requested at build time.
1030 fn_readline_ptr pointer to where to put the readline pointer
1031 fn_addhist_ptr pointer to where to put the addhistory function
1033 Returns: the dlopen handle or NULL on failure
1037 set_readline(char * (**fn_readline_ptr)(char *),
1038 char * (**fn_addhist_ptr)(char *))
1041 void *dlhandle_curses = dlopen("libcurses.so", RTLD_GLOBAL|RTLD_LAZY);
1043 dlhandle = dlopen("libreadline.so", RTLD_GLOBAL|RTLD_NOW);
1044 if (dlhandle_curses != NULL) dlclose(dlhandle_curses);
1046 if (dlhandle != NULL)
1048 *fn_readline_ptr = (char *(*)(char*))dlsym(dlhandle, "readline");
1049 *fn_addhist_ptr = (char *(*)(char*))dlsym(dlhandle, "add_history");
1053 DEBUG(D_any) debug_printf("failed to load readline: %s\n", dlerror());
1062 /*************************************************
1063 * Get a line from stdin for testing things *
1064 *************************************************/
1066 /* This function is called when running tests that can take a number of lines
1067 of input (for example, -be and -bt). It handles continuations and trailing
1068 spaces. And prompting and a blank line output on eof. If readline() is in use,
1069 the arguments are non-NULL and provide the relevant functions.
1072 fn_readline readline function or NULL
1073 fn_addhist addhist function or NULL
1075 Returns: pointer to dynamic memory, or NULL at end of file
1079 get_stdinput(char *(*fn_readline)(char *), char *(*fn_addhist)(char *))
1084 uschar *yield = NULL;
1086 if (fn_readline == NULL) printf("> ");
1090 uschar buffer[1024];
1094 char *readline_line = NULL;
1095 if (fn_readline != NULL)
1097 if ((readline_line = fn_readline((i > 0)? "":"> ")) == NULL) break;
1098 if (*readline_line != 0 && fn_addhist != NULL) fn_addhist(readline_line);
1099 p = US readline_line;
1104 /* readline() not in use */
1107 if (Ufgets(buffer, sizeof(buffer), stdin) == NULL) break;
1111 /* Handle the line */
1113 ss = p + (int)Ustrlen(p);
1114 while (ss > p && isspace(ss[-1])) ss--;
1118 while (p < ss && isspace(*p)) p++; /* leading space after cont */
1121 yield = string_cat(yield, &size, &ptr, p, ss - p);
1124 if (fn_readline != NULL) free(readline_line);
1127 if (ss == p || yield[ptr-1] != '\\')
1135 if (yield == NULL) printf("\n");
1141 /*************************************************
1142 * Entry point and high-level code *
1143 *************************************************/
1145 /* Entry point for the Exim mailer. Analyse the arguments and arrange to take
1146 the appropriate action. All the necessary functions are present in the one
1147 binary. I originally thought one should split it up, but it turns out that so
1148 much of the apparatus is needed in each chunk that one might as well just have
1149 it all available all the time, which then makes the coding easier as well.
1152 argc count of entries in argv
1153 argv argument strings, with argv[0] being the program name
1155 Returns: EXIT_SUCCESS if terminated successfully
1156 EXIT_FAILURE otherwise, except when a message has been sent
1157 to the sender, and -oee was given
1161 main(int argc, char **cargv)
1163 uschar **argv = USS cargv;
1164 int arg_receive_timeout = -1;
1165 int arg_smtp_receive_timeout = -1;
1166 int arg_error_handling = error_handling;
1170 int list_queue_option = 0;
1172 int msg_action_arg = -1;
1173 int namelen = (argv[0] == NULL)? 0 : Ustrlen(argv[0]);
1174 int queue_only_reason = 0;
1176 int perl_start_option = 0;
1178 int recipients_arg = argc;
1179 int sender_address_domain = 0;
1180 int test_retry_arg = -1;
1181 int test_rewrite_arg = -1;
1182 BOOL arg_queue_only = FALSE;
1183 BOOL bi_option = FALSE;
1184 BOOL checking = FALSE;
1185 BOOL count_queue = FALSE;
1186 BOOL expansion_test = FALSE;
1187 BOOL extract_recipients = FALSE;
1188 BOOL forced_delivery = FALSE;
1189 BOOL f_end_dot = FALSE;
1190 BOOL deliver_give_up = FALSE;
1191 BOOL list_queue = FALSE;
1192 BOOL list_options = FALSE;
1193 BOOL local_queue_only;
1195 BOOL one_msg_action = FALSE;
1196 BOOL queue_only_set = FALSE;
1197 BOOL receiving_message = TRUE;
1199 BOOL removed_privilege = FALSE;
1200 BOOL verify_address_mode = FALSE;
1201 BOOL verify_as_sender = FALSE;
1202 BOOL version_printed = FALSE;
1203 uschar *alias_arg = NULL;
1204 uschar *called_as = US"";
1205 uschar *start_queue_run_id = NULL;
1206 uschar *stop_queue_run_id = NULL;
1207 uschar *ftest_domain = NULL;
1208 uschar *ftest_localpart = NULL;
1209 uschar *ftest_prefix = NULL;
1210 uschar *ftest_suffix = NULL;
1211 uschar *real_sender_address;
1212 uschar *originator_home = US"/";
1213 BOOL ftest_system = FALSE;
1217 struct stat statbuf;
1218 pid_t passed_qr_pid = (pid_t)0;
1219 int passed_qr_pipe = -1;
1220 gid_t group_list[NGROUPS_MAX];
1222 /* Possible options for -R and -S */
1224 static uschar *rsopts[] = { US"f", US"ff", US"r", US"rf", US"rff" };
1226 /* Need to define this in case we need to change the environment in order
1227 to get rid of a bogus time zone. We have to make it char rather than uschar
1228 because some OS define it in /usr/include/unistd.h. */
1230 extern char **environ;
1232 /* If the Exim user and/or group and/or the configuration file owner were
1233 defined by ref:name at build time, we must now find the actual uid/gid values.
1234 This is a feature to make the lives of binary distributors easier. */
1236 #ifdef EXIM_USERNAME
1237 if (route_finduser(US EXIM_USERNAME, &pw, &exim_uid))
1239 exim_gid = pw->pw_gid;
1243 fprintf(stderr, "exim: failed to find uid for user name \"%s\"\n",
1249 #ifdef EXIM_GROUPNAME
1250 if (!route_findgroup(US EXIM_GROUPNAME, &exim_gid))
1252 fprintf(stderr, "exim: failed to find gid for group name \"%s\"\n",
1258 #ifdef CONFIGURE_OWNERNAME
1259 if (!route_finduser(US CONFIGURE_OWNERNAME, NULL, &config_uid))
1261 fprintf(stderr, "exim: failed to find uid for user name \"%s\"\n",
1262 CONFIGURE_OWNERNAME);
1267 /* In the Cygwin environment, some initialization needs doing. It is fudged
1268 in by means of this macro. */
1274 /* Check a field which is patched when we are running Exim within its
1275 testing harness; do a fast initial check, and then the whole thing. */
1277 running_in_test_harness =
1278 *running_status == '<' && Ustrcmp(running_status, "<<<testing>>>") == 0;
1280 /* The C standard says that the equivalent of setlocale(LC_ALL, "C") is obeyed
1281 at the start of a program; however, it seems that some environments do not
1282 follow this. A "strange" locale can affect the formatting of timestamps, so we
1285 setlocale(LC_ALL, "C");
1287 /* Set up the default handler for timing using alarm(). */
1289 os_non_restarting_signal(SIGALRM, sigalrm_handler);
1291 /* Ensure we have a buffer for constructing log entries. Use malloc directly,
1292 because store_malloc writes a log entry on failure. */
1294 log_buffer = (uschar *)malloc(LOG_BUFFER_SIZE);
1295 if (log_buffer == NULL)
1297 fprintf(stderr, "exim: failed to get store for log buffer\n");
1301 /* Set log_stderr to stderr, provided that stderr exists. This gets reset to
1302 NULL when the daemon is run and the file is closed. We have to use this
1303 indirection, because some systems don't allow writing to the variable "stderr".
1306 if (fstat(fileno(stderr), &statbuf) >= 0) log_stderr = stderr;
1308 /* Arrange for the PCRE regex library to use our store functions. Note that
1309 the normal calls are actually macros that add additional arguments for
1310 debugging purposes so we have to assign specially constructed functions here.
1311 The default is to use store in the stacking pool, but this is overridden in the
1312 regex_must_compile() function. */
1314 pcre_malloc = function_store_get;
1315 pcre_free = function_dummy_free;
1317 /* Ensure there is a big buffer for temporary use in several places. It is put
1318 in malloc store so that it can be freed for enlargement if necessary. */
1320 big_buffer = store_malloc(big_buffer_size);
1322 /* Set up the handler for the data request signal, and set the initial
1323 descriptive text. */
1325 set_process_info("initializing");
1326 os_restarting_signal(SIGUSR1, usr1_handler);
1328 /* SIGHUP is used to get the daemon to reconfigure. It gets set as appropriate
1329 in the daemon code. For the rest of Exim's uses, we ignore it. */
1331 signal(SIGHUP, SIG_IGN);
1333 /* We don't want to die on pipe errors as the code is written to handle
1334 the write error instead. */
1336 signal(SIGPIPE, SIG_IGN);
1338 /* Under some circumstance on some OS, Exim can get called with SIGCHLD
1339 set to SIG_IGN. This causes subprocesses that complete before the parent
1340 process waits for them not to hang around, so when Exim calls wait(), nothing
1341 is there. The wait() code has been made robust against this, but let's ensure
1342 that SIGCHLD is set to SIG_DFL, because it's tidier to wait and get a process
1343 ending status. We use sigaction rather than plain signal() on those OS where
1344 SA_NOCLDWAIT exists, because we want to be sure it is turned off. (There was a
1345 problem on AIX with this.) */
1349 struct sigaction act;
1350 act.sa_handler = SIG_DFL;
1351 sigemptyset(&(act.sa_mask));
1353 sigaction(SIGCHLD, &act, NULL);
1356 signal(SIGCHLD, SIG_DFL);
1359 /* Save the arguments for use if we re-exec exim as a daemon after receiving
1364 /* Set up the version number. Set up the leading 'E' for the external form of
1365 message ids, set the pointer to the internal form, and initialize it to
1366 indicate no message being processed. */
1369 message_id_option[0] = '-';
1370 message_id_external = message_id_option + 1;
1371 message_id_external[0] = 'E';
1372 message_id = message_id_external + 1;
1375 /* Set the umask to zero so that any files that Exim creates are created
1376 with the modes that it specifies. */
1380 /* Precompile the regular expression for matching a message id. Keep this in
1381 step with the code that generates ids in the accept.c module. We need to do
1382 this here, because the -M options check their arguments for syntactic validity
1383 using mac_ismsgid, which uses this. */
1386 regex_must_compile(US"^(?:[^\\W_]{6}-){2}[^\\W_]{2}$", FALSE, TRUE);
1388 /* If the program is called as "mailq" treat it as equivalent to "exim -bp";
1389 this seems to be a generally accepted convention, since one finds symbolic
1390 links called "mailq" in standard OS configurations. */
1392 if ((namelen == 5 && Ustrcmp(argv[0], "mailq") == 0) ||
1393 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/mailq", 6) == 0))
1396 receiving_message = FALSE;
1397 called_as = US"-mailq";
1400 /* If the program is called as "rmail" treat it as equivalent to
1401 "exim -i -oee", thus allowing UUCP messages to be input using non-SMTP mode,
1402 i.e. preventing a single dot on a line from terminating the message, and
1403 returning with zero return code, even in cases of error (provided an error
1404 message has been sent). */
1406 if ((namelen == 5 && Ustrcmp(argv[0], "rmail") == 0) ||
1407 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/rmail", 6) == 0))
1410 called_as = US"-rmail";
1411 errors_sender_rc = EXIT_SUCCESS;
1414 /* If the program is called as "rsmtp" treat it as equivalent to "exim -bS";
1415 this is a smail convention. */
1417 if ((namelen == 5 && Ustrcmp(argv[0], "rsmtp") == 0) ||
1418 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/rsmtp", 6) == 0))
1420 smtp_input = smtp_batched_input = TRUE;
1421 called_as = US"-rsmtp";
1424 /* If the program is called as "runq" treat it as equivalent to "exim -q";
1425 this is a smail convention. */
1427 if ((namelen == 4 && Ustrcmp(argv[0], "runq") == 0) ||
1428 (namelen > 4 && Ustrncmp(argv[0] + namelen - 5, "/runq", 5) == 0))
1431 receiving_message = FALSE;
1432 called_as = US"-runq";
1435 /* If the program is called as "newaliases" treat it as equivalent to
1436 "exim -bi"; this is a sendmail convention. */
1438 if ((namelen == 10 && Ustrcmp(argv[0], "newaliases") == 0) ||
1439 (namelen > 10 && Ustrncmp(argv[0] + namelen - 11, "/newaliases", 11) == 0))
1442 receiving_message = FALSE;
1443 called_as = US"-newaliases";
1446 /* Save the original effective uid for a couple of uses later. It should
1447 normally be root, but in some esoteric environments it may not be. */
1449 original_euid = geteuid();
1451 /* Get the real uid and gid. If the caller is root, force the effective uid/gid
1452 to be the same as the real ones. This makes a difference only if Exim is setuid
1453 (or setgid) to something other than root, which could be the case in some
1454 special configurations. */
1456 real_uid = getuid();
1457 real_gid = getgid();
1459 if (real_uid == root_uid)
1465 /* If neither the original real uid nor the original euid was root, Exim is
1466 running in an unprivileged state. */
1468 unprivileged = (real_uid != root_uid && original_euid != root_uid);
1470 /* If the first argument is --help, pretend there are no arguments. This will
1471 cause a brief message to be given. */
1473 if (argc > 1 && Ustrcmp(argv[1], "--help") == 0) argc = 1;
1475 /* Scan the program's arguments. Some can be dealt with right away; others are
1476 simply recorded for checking and handling afterwards. Do a high-level switch
1477 on the second character (the one after '-'), to save some effort. */
1479 for (i = 1; i < argc; i++)
1481 BOOL badarg = FALSE;
1482 uschar *arg = argv[i];
1486 /* An argument not starting with '-' is the start of a recipients list;
1487 break out of the options-scanning loop. */
1495 /* An option consistion of -- terminates the options */
1497 if (Ustrcmp(arg, "--") == 0)
1499 recipients_arg = i + 1;
1503 /* Handle flagged options */
1505 switchchar = arg[1];
1508 /* Make all -ex options synonymous with -oex arguments, since that
1509 is assumed by various callers. Also make -qR options synonymous with -R
1510 options, as that seems to be required as well. Allow for -qqR too, and
1511 the same for -S options. */
1513 if (Ustrncmp(arg+1, "oe", 2) == 0 ||
1514 Ustrncmp(arg+1, "qR", 2) == 0 ||
1515 Ustrncmp(arg+1, "qS", 2) == 0)
1517 switchchar = arg[2];
1520 else if (Ustrncmp(arg+1, "qqR", 3) == 0 || Ustrncmp(arg+1, "qqS", 3) == 0)
1522 switchchar = arg[3];
1524 queue_2stage = TRUE;
1527 /* Make -r synonymous with -f, since it is a documented alias */
1529 else if (arg[1] == 'r') switchchar = 'f';
1531 /* Make -ov synonymous with -v */
1533 else if (Ustrcmp(arg, "-ov") == 0)
1539 /* High-level switch on active initial letter */
1543 /* -Btype is a sendmail option for 7bit/8bit setting. Exim is 8-bit clean
1544 so has no need of it. */
1547 if (*argrest == 0) i++; /* Skip over the type */
1552 receiving_message = FALSE; /* Reset TRUE for -bm, -bS, -bs below */
1554 /* -bd: Run in daemon mode, awaiting SMTP connections.
1555 -bdf: Ditto, but in the foreground.
1558 if (*argrest == 'd')
1560 daemon_listen = TRUE;
1561 if (*(++argrest) == 'f') background_daemon = FALSE;
1562 else if (*argrest != 0) { badarg = TRUE; break; }
1565 /* -be: Run in expansion test mode */
1567 else if (*argrest == 'e')
1568 expansion_test = checking = TRUE;
1570 /* -bf: Run in mail filter testing mode
1571 -bF: Ditto, but for system filters
1572 -bfd: Set domain for filter testing
1573 -bfl: Set local part for filter testing
1574 -bfp: Set prefix for filter testing
1575 -bfs: Set suffix for filter testing
1578 else if (*argrest == 'f' || *argrest == 'F')
1580 ftest_system = *argrest++ == 'F';
1583 if(++i < argc) filter_test = argv[i]; else
1585 fprintf(stderr, "exim: file name expected after %s\n", argv[i-1]);
1593 fprintf(stderr, "exim: string expected after %s\n", arg);
1596 if (Ustrcmp(argrest, "d") == 0) ftest_domain = argv[i];
1597 else if (Ustrcmp(argrest, "l") == 0) ftest_localpart = argv[i];
1598 else if (Ustrcmp(argrest, "p") == 0) ftest_prefix = argv[i];
1599 else if (Ustrcmp(argrest, "s") == 0) ftest_suffix = argv[i];
1600 else { badarg = TRUE; break; }
1604 /* -bh: Host checking - an IP address must follow. */
1606 else if (Ustrcmp(argrest, "h") == 0 || Ustrcmp(argrest, "hc") == 0)
1608 if (++i >= argc) { badarg = TRUE; break; }
1609 sender_host_address = argv[i];
1610 host_checking = checking = log_testing_mode = TRUE;
1611 host_checking_callout = argrest[1] == 'c';
1614 /* -bi: This option is used by sendmail to initialize *the* alias file,
1615 though it has the -oA option to specify a different file. Exim has no
1616 concept of *the* alias file, but since Sun's YP make script calls
1617 sendmail this way, some support must be provided. */
1619 else if (Ustrcmp(argrest, "i") == 0) bi_option = TRUE;
1621 /* -bm: Accept and deliver message - the default option. Reinstate
1622 receiving_message, which got turned off for all -b options. */
1624 else if (Ustrcmp(argrest, "m") == 0) receiving_message = TRUE;
1626 /* -bnq: For locally originating messages, do not qualify unqualified
1627 addresses. In the envelope, this causes errors; in header lines they
1630 else if (Ustrcmp(argrest, "nq") == 0)
1632 allow_unqualified_sender = FALSE;
1633 allow_unqualified_recipient = FALSE;
1636 /* -bpxx: List the contents of the mail queue, in various forms. If
1637 the option is -bpc, just a queue count is needed. Otherwise, if the
1638 first letter after p is r, then order is random. */
1640 else if (*argrest == 'p')
1642 if (*(++argrest) == 'c')
1645 if (*(++argrest) != 0) badarg = TRUE;
1649 if (*argrest == 'r')
1651 list_queue_option = 8;
1654 else list_queue_option = 0;
1658 /* -bp: List the contents of the mail queue, top-level only */
1660 if (*argrest == 0) {}
1662 /* -bpu: List the contents of the mail queue, top-level undelivered */
1664 else if (Ustrcmp(argrest, "u") == 0) list_queue_option += 1;
1666 /* -bpa: List the contents of the mail queue, including all delivered */
1668 else if (Ustrcmp(argrest, "a") == 0) list_queue_option += 2;
1670 /* Unknown after -bp[r] */
1680 /* -bP: List the configuration variables given as the address list.
1681 Force -v, so configuration errors get displayed. */
1683 else if (Ustrcmp(argrest, "P") == 0)
1685 list_options = TRUE;
1686 debug_selector |= D_v;
1687 debug_file = stderr;
1690 /* -brt: Test retry configuration lookup */
1692 else if (Ustrcmp(argrest, "rt") == 0)
1694 test_retry_arg = i + 1;
1698 /* -brw: Test rewrite configuration */
1700 else if (Ustrcmp(argrest, "rw") == 0)
1702 test_rewrite_arg = i + 1;
1706 /* -bS: Read SMTP commands on standard input, but produce no replies -
1707 all errors are reported by sending messages. */
1709 else if (Ustrcmp(argrest, "S") == 0)
1710 smtp_input = smtp_batched_input = receiving_message = TRUE;
1712 /* -bs: Read SMTP commands on standard input and produce SMTP replies
1713 on standard output. */
1715 else if (Ustrcmp(argrest, "s") == 0) smtp_input = receiving_message = TRUE;
1717 /* -bt: address testing mode */
1719 else if (Ustrcmp(argrest, "t") == 0)
1720 address_test_mode = checking = log_testing_mode = TRUE;
1722 /* -bv: verify addresses */
1724 else if (Ustrcmp(argrest, "v") == 0)
1725 verify_address_mode = checking = log_testing_mode = TRUE;
1727 /* -bvs: verify sender addresses */
1729 else if (Ustrcmp(argrest, "vs") == 0)
1731 verify_address_mode = checking = log_testing_mode = TRUE;
1732 verify_as_sender = TRUE;
1735 /* -bV: Print version string and support details */
1737 else if (Ustrcmp(argrest, "V") == 0)
1739 printf("Exim version %s #%s built %s\n", version_string,
1740 version_cnumber, version_date);
1741 printf("%s\n", CS version_copyright);
1742 version_printed = TRUE;
1743 show_whats_supported(stdout);
1750 /* -C: change configuration file list; ignore if it isn't really
1751 a change! Enforce a prefix check if required. */
1756 if(++i < argc) argrest = argv[i]; else
1757 { badarg = TRUE; break; }
1759 if (Ustrcmp(config_main_filelist, argrest) != 0)
1761 #ifdef ALT_CONFIG_PREFIX
1763 int len = Ustrlen(ALT_CONFIG_PREFIX);
1764 uschar *list = argrest;
1766 while((filename = string_nextinlist(&list, &sep, big_buffer,
1767 big_buffer_size)) != NULL)
1769 if ((Ustrlen(filename) < len ||
1770 Ustrncmp(filename, ALT_CONFIG_PREFIX, len) != 0 ||
1771 Ustrstr(filename, "/../") != NULL) &&
1772 (Ustrcmp(filename, "/dev/null") != 0 || real_uid != root_uid))
1774 fprintf(stderr, "-C Permission denied\n");
1780 config_main_filelist = argrest;
1781 config_changed = TRUE;
1786 /* -D: set up a macro definition */
1789 #ifdef DISABLE_D_OPTION
1790 fprintf(stderr, "exim: -D is not available in this Exim binary\n");
1795 macro_item *mlast = NULL;
1798 uschar *s = argrest;
1800 while (isspace(*s)) s++;
1802 if (*s < 'A' || *s > 'Z')
1804 fprintf(stderr, "exim: macro name set by -D must start with "
1805 "an upper case letter\n");
1809 while (isalnum(*s) || *s == '_')
1811 if (ptr < sizeof(name)-1) name[ptr++] = *s;
1815 if (ptr == 0) { badarg = TRUE; break; }
1816 while (isspace(*s)) s++;
1819 if (*s++ != '=') { badarg = TRUE; break; }
1820 while (isspace(*s)) s++;
1823 for (m = macros; m != NULL; m = m->next)
1825 if (Ustrcmp(m->name, name) == 0)
1827 fprintf(stderr, "exim: duplicated -D in command line\n");
1833 m = store_get(sizeof(macro_item) + Ustrlen(name));
1835 m->command_line = TRUE;
1836 if (mlast == NULL) macros = m; else mlast->next = m;
1837 Ustrcpy(m->name, name);
1838 m->replacement = string_copy(s);
1840 if (clmacro_count >= MAX_CLMACROS)
1842 fprintf(stderr, "exim: too many -D options on command line\n");
1845 clmacros[clmacro_count++] = string_sprintf("-D%s=%s", m->name,
1851 /* -d: Set debug level (see also -v below) or set the drop_cr option.
1852 The latter is now a no-opt, retained for compatibility only. */
1855 if (Ustrcmp(argrest, "ropcr") == 0)
1857 /* drop_cr = TRUE; */
1860 /* Use an intermediate variable so that we don't set debugging while
1861 decoding the debugging bits. */
1865 unsigned int selector = D_default;
1869 decode_bits(&selector, NULL, argrest, debug_options,
1870 debug_options_count, US"debug");
1871 debug_selector = selector;
1876 /* -E: This is a local error message. This option is not intended for
1877 external use at all, but is not restricted to trusted callers because it
1878 does no harm (just suppresses certain error messages) and if Exim is run
1879 not setuid root it won't always be trusted when it generates error
1880 messages using this option. If there is a message id following -E, point
1881 message_reference at it, for logging. */
1884 local_error_message = TRUE;
1885 if (mac_ismsgid(argrest)) message_reference = argrest;
1889 /* -ex: The vacation program calls sendmail with the undocumented "-eq"
1890 option, so it looks as if historically the -oex options are also callable
1891 without the leading -o. So we have to accept them. Before the switch,
1892 anything starting -oe has been converted to -e. Exim does not support all
1893 of the sendmail error options. */
1896 if (Ustrcmp(argrest, "e") == 0)
1898 arg_error_handling = ERRORS_SENDER;
1899 errors_sender_rc = EXIT_SUCCESS;
1901 else if (Ustrcmp(argrest, "m") == 0) arg_error_handling = ERRORS_SENDER;
1902 else if (Ustrcmp(argrest, "p") == 0) arg_error_handling = ERRORS_STDERR;
1903 else if (Ustrcmp(argrest, "q") == 0) arg_error_handling = ERRORS_STDERR;
1904 else if (Ustrcmp(argrest, "w") == 0) arg_error_handling = ERRORS_SENDER;
1909 /* -F: Set sender's full name, used instead of the gecos entry from
1910 the password file. Since users can usually alter their gecos entries,
1911 there's no security involved in using this instead. The data can follow
1912 the -F or be in the next argument. */
1917 if(++i < argc) argrest = argv[i]; else
1918 { badarg = TRUE; break; }
1920 originator_name = argrest;
1924 /* -f: Set sender's address - this value is only actually used if Exim is
1925 run by a trusted user, or if untrusted_set_sender is set and matches the
1926 address, except that the null address can always be set by any user. The
1927 test for this happens later, when the value given here is ignored when not
1928 permitted. For an untrusted user, the actual sender is still put in Sender:
1929 if it doesn't match the From: header (unless no_local_from_check is set).
1930 The data can follow the -f or be in the next argument. The -r switch is an
1931 obsolete form of -f but since there appear to be programs out there that
1932 use anything that sendmail has ever supported, better accept it - the
1933 synonymizing is done before the switch above.
1935 At this stage, we must allow domain literal addresses, because we don't
1936 know what the setting of allow_domain_literals is yet. Ditto for trailing
1937 dots and strip_trailing_dot. */
1945 if (i+1 < argc) argrest = argv[++i]; else
1946 { badarg = TRUE; break; }
1950 sender_address = string_sprintf(""); /* Ensure writeable memory */
1954 uschar *temp = argrest + Ustrlen(argrest) - 1;
1955 while (temp >= argrest && isspace(*temp)) temp--;
1956 if (temp >= argrest && *temp == '.') f_end_dot = TRUE;
1957 allow_domain_literals = TRUE;
1958 strip_trailing_dot = TRUE;
1959 sender_address = parse_extract_address(argrest, &errmess, &start, &end,
1960 &sender_address_domain, TRUE);
1961 allow_domain_literals = FALSE;
1962 strip_trailing_dot = FALSE;
1963 if (sender_address == NULL)
1965 fprintf(stderr, "exim: bad -f address \"%s\": %s\n", argrest, errmess);
1966 return EXIT_FAILURE;
1969 sender_address_forced = TRUE;
1973 /* This is some Sendmail thing which can be ignored */
1978 /* -h: Set the hop count for an incoming message. Exim does not currently
1979 support this; it always computes it by counting the Received: headers.
1980 To put it in will require a change to the spool header file format. */
1985 if(++i < argc) argrest = argv[i]; else
1986 { badarg = TRUE; break; }
1988 if (!isdigit(*argrest)) badarg = TRUE;
1992 /* -i: Set flag so dot doesn't end non-SMTP input (same as -oi, seems
1993 not to be documented for sendmail but mailx (at least) uses it) */
1996 if (*argrest == 0) dot_ends = FALSE; else badarg = TRUE;
2001 receiving_message = FALSE;
2003 /* -MC: continue delivery of another message via an existing open
2004 file descriptor. This option is used for an internal call by the
2005 smtp transport when there is a pending message waiting to go to an
2006 address to which it has got a connection. Five subsequent arguments are
2007 required: transport name, host name, IP address, sequence number, and
2008 message_id. Transports may decline to create new processes if the sequence
2009 number gets too big. The channel is stdin. This (-MC) must be the last
2010 argument. There's a subsequent check that the real-uid is privileged.
2012 If we are running in the test harness. delay for a bit, to let the process
2013 that set this one up complete. This makes for repeatability of the logging,
2016 if (Ustrcmp(argrest, "C") == 0)
2020 fprintf(stderr, "exim: too many or too few arguments after -MC\n");
2021 return EXIT_FAILURE;
2024 if (msg_action_arg >= 0)
2026 fprintf(stderr, "exim: incompatible arguments\n");
2027 return EXIT_FAILURE;
2030 continue_transport = argv[++i];
2031 continue_hostname = argv[++i];
2032 continue_host_address = argv[++i];
2033 continue_sequence = Uatoi(argv[++i]);
2034 msg_action = MSG_DELIVER;
2035 msg_action_arg = ++i;
2036 forced_delivery = TRUE;
2037 queue_run_pid = passed_qr_pid;
2038 queue_run_pipe = passed_qr_pipe;
2040 if (!mac_ismsgid(argv[i]))
2042 fprintf(stderr, "exim: malformed message id %s after -MC option\n",
2044 return EXIT_FAILURE;
2047 if (running_in_test_harness) millisleep(500);
2051 /* -MCA: set the smtp_authenticated flag; this is useful only when it
2052 precedes -MC (see above). The flag indicates that the host to which
2053 Exim is connected has accepted an AUTH sequence. */
2055 else if (Ustrcmp(argrest, "CA") == 0)
2057 smtp_authenticated = TRUE;
2061 /* -MCP: set the smtp_use_pipelining flag; this is useful only when
2062 it preceded -MC (see above) */
2064 else if (Ustrcmp(argrest, "CP") == 0)
2066 smtp_use_pipelining = TRUE;
2070 /* -MCQ: pass on the pid of the queue-running process that started
2071 this chain of deliveries and the fd of its synchronizing pipe; this
2072 is useful only when it precedes -MC (see above) */
2074 else if (Ustrcmp(argrest, "CQ") == 0)
2076 if(++i < argc) passed_qr_pid = (pid_t)(Uatol(argv[i]));
2078 if(++i < argc) passed_qr_pipe = (int)(Uatol(argv[i]));
2083 /* -MCS: set the smtp_use_size flag; this is useful only when it
2084 precedes -MC (see above) */
2086 else if (Ustrcmp(argrest, "CS") == 0)
2088 smtp_use_size = TRUE;
2092 /* -MCT: set the tls_offered flag; this is useful only when it
2093 precedes -MC (see above). The flag indicates that the host to which
2094 Exim is connected has offered TLS support. */
2097 else if (Ustrcmp(argrest, "CT") == 0)
2104 /* -M[x]: various operations on the following list of message ids:
2105 -M deliver the messages, ignoring next retry times and thawing
2106 -Mc deliver the messages, checking next retry times, no thawing
2107 -Mf freeze the messages
2108 -Mg give up on the messages
2109 -Mt thaw the messages
2110 -Mrm remove the messages
2111 In the above cases, this must be the last option. There are also the
2112 following options which are followed by a single message id, and which
2113 act on that message. Some of them use the "recipient" addresses as well.
2114 -Mar add recipient(s)
2115 -Mmad mark all recipients delivered
2116 -Mmd mark recipients(s) delivered
2123 else if (*argrest == 0)
2125 msg_action = MSG_DELIVER;
2126 forced_delivery = deliver_force_thaw = TRUE;
2128 else if (Ustrcmp(argrest, "ar") == 0)
2130 msg_action = MSG_ADD_RECIPIENT;
2131 one_msg_action = TRUE;
2133 else if (Ustrcmp(argrest, "c") == 0) msg_action = MSG_DELIVER;
2134 else if (Ustrcmp(argrest, "es") == 0)
2136 msg_action = MSG_EDIT_SENDER;
2137 one_msg_action = TRUE;
2139 else if (Ustrcmp(argrest, "f") == 0) msg_action = MSG_FREEZE;
2140 else if (Ustrcmp(argrest, "g") == 0)
2142 msg_action = MSG_DELIVER;
2143 deliver_give_up = TRUE;
2145 else if (Ustrcmp(argrest, "mad") == 0)
2147 msg_action = MSG_MARK_ALL_DELIVERED;
2149 else if (Ustrcmp(argrest, "md") == 0)
2151 msg_action = MSG_MARK_DELIVERED;
2152 one_msg_action = TRUE;
2154 else if (Ustrcmp(argrest, "rm") == 0) msg_action = MSG_REMOVE;
2155 else if (Ustrcmp(argrest, "t") == 0) msg_action = MSG_THAW;
2156 else if (Ustrcmp(argrest, "vb") == 0)
2158 msg_action = MSG_SHOW_BODY;
2159 one_msg_action = TRUE;
2161 else if (Ustrcmp(argrest, "vh") == 0)
2163 msg_action = MSG_SHOW_HEADER;
2164 one_msg_action = TRUE;
2166 else if (Ustrcmp(argrest, "vl") == 0)
2168 msg_action = MSG_SHOW_LOG;
2169 one_msg_action = TRUE;
2171 else { badarg = TRUE; break; }
2173 /* All the -Mxx options require at least one message id. */
2175 msg_action_arg = i + 1;
2176 if (msg_action_arg >= argc)
2178 fprintf(stderr, "exim: no message ids given after %s option\n", arg);
2179 return EXIT_FAILURE;
2182 /* Some require only message ids to follow */
2184 if (!one_msg_action)
2187 for (j = msg_action_arg; j < argc; j++) if (!mac_ismsgid(argv[j]))
2189 fprintf(stderr, "exim: malformed message id %s after %s option\n",
2191 return EXIT_FAILURE;
2193 goto END_ARG; /* Remaining args are ids */
2196 /* Others require only one message id, possibly followed by addresses,
2197 which will be handled as normal arguments. */
2201 if (!mac_ismsgid(argv[msg_action_arg]))
2203 fprintf(stderr, "exim: malformed message id %s after %s option\n",
2204 argv[msg_action_arg], arg);
2205 return EXIT_FAILURE;
2212 /* Some programs seem to call the -om option without the leading o;
2213 for sendmail it askes for "me too". Exim always does this. */
2216 if (*argrest != 0) badarg = TRUE;
2220 /* -N: don't do delivery - a debugging option that stops transports doing
2221 their thing. It implies debugging at the D_v level. */
2226 dont_deliver = TRUE;
2227 debug_selector |= D_v;
2228 debug_file = stderr;
2234 /* -n: This means "don't alias" in sendmail, apparently. Just ignore
2240 /* -O: Just ignore it. In sendmail, apparently -O option=value means set
2241 option to the specified value. This form uses long names. We need to handle
2242 -O option=value and -Ooption=value. */
2249 fprintf(stderr, "exim: string expected after -O\n");
2257 /* -oA: Set an argument for the bi command (sendmail's "alternate alias
2260 if (*argrest == 'A')
2262 alias_arg = argrest + 1;
2263 if (alias_arg[0] == 0)
2265 if (i+1 < argc) alias_arg = argv[++i]; else
2267 fprintf(stderr, "exim: string expected after -oA\n");
2273 /* -oB: Set a connection message max value for remote deliveries */
2275 else if (*argrest == 'B')
2277 uschar *p = argrest + 1;
2280 if (i+1 < argc && isdigit((argv[i+1][0]))) p = argv[++i]; else
2282 connection_max_messages = 1;
2291 fprintf(stderr, "exim: number expected after -oB\n");
2294 connection_max_messages = Uatoi(p);
2298 /* -odb: background delivery */
2300 else if (Ustrcmp(argrest, "db") == 0)
2302 synchronous_delivery = FALSE;
2303 arg_queue_only = FALSE;
2304 queue_only_set = TRUE;
2307 /* -odf: foreground delivery (smail-compatible option); same effect as
2308 -odi: interactive (synchronous) delivery (sendmail-compatible option)
2311 else if (Ustrcmp(argrest, "df") == 0 || Ustrcmp(argrest, "di") == 0)
2313 synchronous_delivery = TRUE;
2314 arg_queue_only = FALSE;
2315 queue_only_set = TRUE;
2318 /* -odq: queue only */
2320 else if (Ustrcmp(argrest, "dq") == 0)
2322 synchronous_delivery = FALSE;
2323 arg_queue_only = TRUE;
2324 queue_only_set = TRUE;
2327 /* -odqs: queue SMTP only - do local deliveries and remote routing,
2328 but no remote delivery */
2330 else if (Ustrcmp(argrest, "dqs") == 0)
2333 arg_queue_only = FALSE;
2334 queue_only_set = TRUE;
2337 /* -oex: Sendmail error flags. As these are also accepted without the
2338 leading -o prefix, for compatibility with vacation and other callers,
2339 they are handled with -e above. */
2341 /* -oi: Set flag so dot doesn't end non-SMTP input (same as -i)
2342 -oitrue: Another sendmail syntax for the same */
2344 else if (Ustrcmp(argrest, "i") == 0 ||
2345 Ustrcmp(argrest, "itrue") == 0)
2348 /* -oM*: Set various characteristics for an incoming message; actually
2349 acted on for trusted callers only. */
2351 else if (*argrest == 'M')
2355 fprintf(stderr, "exim: data expected after -o%s\n", argrest);
2359 /* -oMa: Set sender host address */
2361 if (Ustrcmp(argrest, "Ma") == 0) sender_host_address = argv[++i];
2363 /* -oMaa: Set authenticator name */
2365 else if (Ustrcmp(argrest, "Maa") == 0)
2366 sender_host_authenticated = argv[++i];
2368 /* -oMas: setting authenticated sender */
2370 else if (Ustrcmp(argrest, "Mas") == 0) authenticated_sender = argv[++i];
2372 /* -oMai: setting authenticated id */
2374 else if (Ustrcmp(argrest, "Mai") == 0) authenticated_id = argv[++i];
2376 /* -oMi: Set incoming interface address */
2378 else if (Ustrcmp(argrest, "Mi") == 0) interface_address = argv[++i];
2380 /* -oMr: Received protocol */
2382 else if (Ustrcmp(argrest, "Mr") == 0) received_protocol = argv[++i];
2384 /* -oMs: Set sender host name */
2386 else if (Ustrcmp(argrest, "Ms") == 0) sender_host_name = argv[++i];
2388 /* -oMt: Set sender ident */
2390 else if (Ustrcmp(argrest, "Mt") == 0) sender_ident = argv[++i];
2392 /* Else a bad argument */
2401 /* -om: Me-too flag for aliases. Exim always does this. Some programs
2402 seem to call this as -m (undocumented), so that is also accepted (see
2405 else if (Ustrcmp(argrest, "m") == 0) {}
2407 /* -oo: An ancient flag for old-style addresses which still seems to
2408 crop up in some calls (see in SCO). */
2410 else if (Ustrcmp(argrest, "o") == 0) {}
2412 /* -oP <name>: set pid file path for daemon */
2414 else if (Ustrcmp(argrest, "P") == 0)
2415 override_pid_file_path = argv[++i];
2417 /* -or <n>: set timeout for non-SMTP acceptance
2418 -os <n>: set timeout for SMTP acceptance */
2420 else if (*argrest == 'r' || *argrest == 's')
2422 int *tp = (*argrest == 'r')?
2423 &arg_receive_timeout : &arg_smtp_receive_timeout;
2424 if (argrest[1] == 0)
2426 if (i+1 < argc) *tp= readconf_readtime(argv[++i], 0, FALSE);
2428 else *tp = readconf_readtime(argrest + 1, 0, FALSE);
2431 fprintf(stderr, "exim: bad time value %s: abandoned\n", argv[i]);
2436 /* -oX <list>: Override local_interfaces and/or default daemon ports */
2438 else if (Ustrcmp(argrest, "X") == 0)
2439 override_local_interfaces = argv[++i];
2441 /* Unknown -o argument */
2447 /* -ps: force Perl startup; -pd force delayed Perl startup */
2451 if (*argrest == 's' && argrest[1] == 0)
2453 perl_start_option = 1;
2456 if (*argrest == 'd' && argrest[1] == 0)
2458 perl_start_option = -1;
2463 /* -panythingelse is taken as the Sendmail-compatible argument -prval:sval,
2464 which sets the host protocol and host name */
2468 if (i+1 < argc) argrest = argv[++i]; else
2469 { badarg = TRUE; break; }
2474 uschar *hn = Ustrchr(argrest, ':');
2477 received_protocol = argrest;
2481 received_protocol = string_copyn(argrest, hn - argrest);
2482 sender_host_name = hn + 1;
2489 receiving_message = FALSE;
2491 /* -qq...: Do queue runs in a 2-stage manner */
2493 if (*argrest == 'q')
2495 queue_2stage = TRUE;
2499 /* -qi...: Do only first (initial) deliveries */
2501 if (*argrest == 'i')
2503 queue_run_first_delivery = TRUE;
2507 /* -qf...: Run the queue, forcing deliveries
2508 -qff..: Ditto, forcing thawing as well */
2510 if (*argrest == 'f')
2512 queue_run_force = TRUE;
2513 if (*(++argrest) == 'f')
2515 deliver_force_thaw = TRUE;
2520 /* -q[f][f]l...: Run the queue only on local deliveries */
2522 if (*argrest == 'l')
2524 queue_run_local = TRUE;
2528 /* -q[f][f][l]: Run the queue, optionally forced, optionally local only,
2529 optionally starting from a given message id. */
2531 if (*argrest == 0 &&
2532 (i + 1 >= argc || argv[i+1][0] == '-' || mac_ismsgid(argv[i+1])))
2535 if (i+1 < argc && mac_ismsgid(argv[i+1]))
2536 start_queue_run_id = argv[++i];
2537 if (i+1 < argc && mac_ismsgid(argv[i+1]))
2538 stop_queue_run_id = argv[++i];
2541 /* -q[f][f][l]<n>: Run the queue at regular intervals, optionally forced,
2542 optionally local only. */
2547 queue_interval = readconf_readtime(argrest, 0, FALSE);
2549 queue_interval = readconf_readtime(argv[++i], 0, FALSE);
2550 if (queue_interval <= 0)
2552 fprintf(stderr, "exim: bad time value %s: abandoned\n", argv[i]);
2559 case 'R': /* Synonymous with -qR... */
2560 receiving_message = FALSE;
2562 /* -Rf: As -R (below) but force all deliveries,
2563 -Rff: Ditto, but also thaw all frozen messages,
2564 -Rr: String is regex
2565 -Rrf: Regex and force
2566 -Rrff: Regex and force and thaw
2568 in all cases provided there are no further characters in this
2574 for (i = 0; i < sizeof(rsopts)/sizeof(uschar *); i++)
2576 if (Ustrcmp(argrest, rsopts[i]) == 0)
2578 if (i != 2) queue_run_force = TRUE;
2579 if (i >= 2) deliver_selectstring_regex = TRUE;
2580 if (i == 1 || i == 4) deliver_force_thaw = TRUE;
2581 argrest += Ustrlen(rsopts[i]);
2586 /* -R: Set string to match in addresses for forced queue run to
2587 pick out particular messages. */
2591 if (i+1 < argc) deliver_selectstring = argv[++i]; else
2593 fprintf(stderr, "exim: string expected after -R\n");
2597 else deliver_selectstring = argrest;
2598 if (queue_interval < 0) queue_interval = 0;
2602 /* -r: an obsolete synonym for -f (see above) */
2605 /* -S: Like -R but works on sender. */
2607 case 'S': /* Synonymous with -qS... */
2608 receiving_message = FALSE;
2610 /* -Sf: As -S (below) but force all deliveries,
2611 -Sff: Ditto, but also thaw all frozen messages,
2612 -Sr: String is regex
2613 -Srf: Regex and force
2614 -Srff: Regex and force and thaw
2616 in all cases provided there are no further characters in this
2622 for (i = 0; i < sizeof(rsopts)/sizeof(uschar *); i++)
2624 if (Ustrcmp(argrest, rsopts[i]) == 0)
2626 if (i != 2) queue_run_force = TRUE;
2627 if (i >= 2) deliver_selectstring_sender_regex = TRUE;
2628 if (i == 1 || i == 4) deliver_force_thaw = TRUE;
2629 argrest += Ustrlen(rsopts[i]);
2634 /* -S: Set string to match in addresses for forced queue run to
2635 pick out particular messages. */
2639 if (i+1 < argc) deliver_selectstring_sender = argv[++i]; else
2641 fprintf(stderr, "exim: string expected after -S\n");
2645 else deliver_selectstring_sender = argrest;
2646 if (queue_interval < 0) queue_interval = 0;
2649 /* -Tqt is an option that is exclusively for use by the testing suite.
2650 It is not recognized in other circumstances. It allows for the setting up
2651 of explicit "queue times" so that various warning/retry things can be
2652 tested. Otherwise variability of clock ticks etc. cause problems. */
2655 if (running_in_test_harness && Ustrcmp(argrest, "qt") == 0)
2656 fudged_queue_times = argv[++i];
2661 /* -t: Set flag to extract recipients from body of message. */
2664 if (*argrest == 0) extract_recipients = TRUE;
2666 /* -ti: Set flag to extract recipients from body of message, and also
2667 specify that dot does not end the message. */
2669 else if (Ustrcmp(argrest, "i") == 0)
2671 extract_recipients = TRUE;
2675 /* -tls-on-connect: don't wait for STARTTLS (for old clients) */
2678 else if (Ustrcmp(argrest, "ls-on-connect") == 0) tls_on_connect = TRUE;
2685 /* -U: This means "initial user submission" in sendmail, apparently. The
2686 doc claims that in future sendmail may refuse syntactically invalid
2687 messages instead of fixing them. For the moment, we just ignore it. */
2693 /* -v: verify things - this is a very low-level debugging */
2698 debug_selector |= D_v;
2699 debug_file = stderr;
2705 /* -x: AIX uses this to indicate some fancy 8-bit character stuff:
2707 The -x flag tells the sendmail command that mail from a local
2708 mail program has National Language Support (NLS) extended characters
2709 in the body of the mail item. The sendmail command can send mail with
2710 extended NLS characters across networks that normally corrupts these
2713 As Exim is 8-bit clean, it just ignores this flag. */
2716 if (*argrest != 0) badarg = TRUE;
2719 /* All other initial characters are errors */
2724 } /* End of high-level switch statement */
2726 /* Failed to recognize the option, or syntax error */
2730 fprintf(stderr, "exim abandoned: unknown, malformed, or incomplete "
2731 "option %s\n", arg);
2737 /* Arguments have been processed. Check for incompatibilities. */
2741 (smtp_input || extract_recipients || recipients_arg < argc) &&
2742 (daemon_listen || queue_interval >= 0 || bi_option ||
2743 test_retry_arg >= 0 || test_rewrite_arg >= 0 ||
2744 filter_test != NULL || (msg_action_arg > 0 && !one_msg_action))
2747 msg_action_arg > 0 &&
2748 (daemon_listen || queue_interval >= 0 || list_options || checking ||
2749 bi_option || test_retry_arg >= 0 || test_rewrite_arg >= 0)
2752 (daemon_listen || queue_interval >= 0) &&
2753 (sender_address != NULL || list_options || list_queue || checking ||
2757 daemon_listen && queue_interval == 0
2761 (checking || smtp_input || extract_recipients ||
2762 filter_test != NULL || bi_option)
2765 verify_address_mode &&
2766 (address_test_mode || smtp_input || extract_recipients ||
2767 filter_test != NULL || bi_option)
2770 address_test_mode && (smtp_input || extract_recipients ||
2771 filter_test != NULL || bi_option)
2774 smtp_input && (sender_address != NULL || filter_test != NULL ||
2778 deliver_selectstring != NULL && queue_interval < 0
2782 fprintf(stderr, "exim: incompatible command-line options or arguments\n");
2786 /* If debugging is set up, set the file and the file descriptor to pass on to
2787 child processes. It should, of course, be 2 for stderr. Also, force the daemon
2788 to run in the foreground. */
2790 if (debug_selector != 0)
2792 debug_file = stderr;
2793 debug_fd = fileno(debug_file);
2794 background_daemon = FALSE;
2795 if (running_in_test_harness) millisleep(100); /* lets caller finish */
2796 if (debug_selector != D_v) /* -v only doesn't show this */
2798 debug_printf("Exim version %s uid=%ld gid=%ld pid=%d D=%x\n",
2799 version_string, (long int)real_uid, (long int)real_gid, (int)getpid(),
2801 show_whats_supported(stderr);
2805 /* When started with root privilege, ensure that the limits on the number of
2806 open files and the number of processes (where that is accessible) are
2807 sufficiently large, or are unset, in case Exim has been called from an
2808 environment where the limits are screwed down. Not all OS have the ability to
2809 change some of these limits. */
2813 DEBUG(D_any) debug_print_ids(US"Exim has no root privilege:");
2819 #ifdef RLIMIT_NOFILE
2820 if (getrlimit(RLIMIT_NOFILE, &rlp) < 0)
2822 log_write(0, LOG_MAIN|LOG_PANIC, "getrlimit(RLIMIT_NOFILE) failed: %s",
2824 rlp.rlim_cur = rlp.rlim_max = 0;
2826 if (rlp.rlim_cur < 1000)
2828 rlp.rlim_cur = rlp.rlim_max = 1000;
2829 if (setrlimit(RLIMIT_NOFILE, &rlp) < 0)
2830 log_write(0, LOG_MAIN|LOG_PANIC, "setrlimit(RLIMIT_NOFILE) failed: %s",
2836 if (getrlimit(RLIMIT_NPROC, &rlp) < 0)
2838 log_write(0, LOG_MAIN|LOG_PANIC, "getrlimit(RLIMIT_NPROC) failed: %s",
2840 rlp.rlim_cur = rlp.rlim_max = 0;
2843 #ifdef RLIM_INFINITY
2844 if (rlp.rlim_cur != RLIM_INFINITY && rlp.rlim_cur < 1000)
2846 rlp.rlim_cur = rlp.rlim_max = RLIM_INFINITY;
2848 if (rlp.rlim_cur < 1000)
2850 rlp.rlim_cur = rlp.rlim_max = 1000;
2852 if (setrlimit(RLIMIT_NPROC, &rlp) < 0)
2853 log_write(0, LOG_MAIN|LOG_PANIC, "setrlimit(RLIMIT_NPROC) failed: %s",
2859 /* Exim is normally entered as root (but some special configurations are
2860 possible that don't do this). However, it always spins off sub-processes that
2861 set their uid and gid as required for local delivery. We don't want to pass on
2862 any extra groups that root may belong to, so we want to get rid of them all at
2865 We need to obey setgroups() at this stage, before possibly giving up root
2866 privilege for a changed configuration file, but later on we might need to
2867 check on the additional groups for the admin user privilege - can't do that
2868 till after reading the config, which might specify the exim gid. Therefore,
2869 save the group list here first. */
2871 group_count = getgroups(NGROUPS_MAX, group_list);
2873 /* There is a fundamental difference in some BSD systems in the matter of
2874 groups. FreeBSD and BSDI are known to be different; NetBSD and OpenBSD are
2875 known not to be different. On the "different" systems there is a single group
2876 list, and the first entry in it is the current group. On all other versions of
2877 Unix there is a supplementary group list, which is in *addition* to the current
2878 group. Consequently, to get rid of all extraneous groups on a "standard" system
2879 you pass over 0 groups to setgroups(), while on a "different" system you pass
2880 over a single group - the current group, which is always the first group in the
2881 list. Calling setgroups() with zero groups on a "different" system results in
2882 an error return. The following code should cope with both types of system.
2884 However, if this process isn't running as root, setgroups() can't be used
2885 since you have to be root to run it, even if throwing away groups. Not being
2886 root here happens only in some unusual configurations. We just ignore the
2889 if (setgroups(0, NULL) != 0)
2891 if (setgroups(1, group_list) != 0 && !unprivileged)
2893 fprintf(stderr, "exim: setgroups() failed: %s\n", strerror(errno));
2898 /* If the configuration file name has been altered by an argument on the
2899 command line (either a new file name or a macro definition) and the caller is
2900 not root or the exim user, or if this is a filter testing run, remove any
2901 setuid privilege the program has, and run as the underlying user.
2903 If ALT_CONFIG_ROOT_ONLY is defined, the exim user is locked out of this, which
2904 severely restricts the use of -C for some purposes.
2906 Otherwise, set the real ids to the effective values (should be root unless run
2907 from inetd, which it can either be root or the exim uid, if one is configured).
2909 There is a private mechanism for bypassing some of this, in order to make it
2910 possible to test lots of configurations automatically, without having either to
2911 recompile each time, or to patch in an actual configuration file name and other
2912 values (such as the path name). If running in the test harness, pretend that
2913 configuration file changes and macro definitions haven't happened. */
2916 (config_changed || macros != NULL) && /* Config changed, and */
2917 real_uid != root_uid && /* Not root, and */
2918 #ifndef ALT_CONFIG_ROOT_ONLY /* (when not locked out) */
2919 real_uid != exim_uid && /* Not exim, and */
2921 !running_in_test_harness /* Not fudged */
2923 expansion_test /* expansion testing */
2925 filter_test != NULL) /* Filter testing */
2927 setgroups(group_count, group_list);
2928 exim_setugid(real_uid, real_gid, FALSE,
2929 US"-C, -D, -be or -bf forces real uid");
2930 removed_privilege = TRUE;
2932 /* In the normal case when Exim is called like this, stderr is available
2933 and should be used for any logging information because attempts to write
2934 to the log will usually fail. To arrange this, we unset really_exim. However,
2935 if no stderr is available there is no point - we might as well have a go
2936 at the log (if it fails, syslog will be written). */
2938 if (log_stderr != NULL) really_exim = FALSE;
2941 /* Privilege is to be retained for the moment. It may be dropped later,
2942 depending on the job that this Exim process has been asked to do. For now, set
2943 the real uid to the effective so that subsequent re-execs of Exim are done by a
2946 else exim_setugid(geteuid(), getegid(), FALSE, US"forcing real = effective");
2948 /* If testing a filter, open the file now, before wasting time doing other
2949 setups and reading the message. */
2951 if (filter_test != NULL)
2953 filter_fd = Uopen(filter_test, O_RDONLY,0);
2956 fprintf(stderr, "exim: failed to open %s: %s\n", filter_test,
2958 return EXIT_FAILURE;
2962 /* Read the main runtime configuration data; this gives up if there
2963 is a failure. It leaves the configuration file open so that the subsequent
2964 configuration data for delivery can be read if needed. */
2968 /* Handle the decoding of logging options. */
2970 decode_bits(&log_write_selector, &log_extra_selector, log_selector_string,
2971 log_options, log_options_count, US"log");
2975 debug_printf("configuration file is %s\n", config_main_filename);
2976 debug_printf("log selectors = %08x %08x\n", log_write_selector,
2977 log_extra_selector);
2980 /* If domain literals are not allowed, check the sender address that was
2981 supplied with -f. Ditto for a stripped trailing dot. */
2983 if (sender_address != NULL)
2985 if (sender_address[sender_address_domain] == '[' && !allow_domain_literals)
2987 fprintf(stderr, "exim: bad -f address \"%s\": domain literals not "
2988 "allowed\n", sender_address);
2989 return EXIT_FAILURE;
2991 if (f_end_dot && !strip_trailing_dot)
2993 fprintf(stderr, "exim: bad -f address \"%s.\": domain is malformed "
2994 "(trailing dot not allowed)\n", sender_address);
2995 return EXIT_FAILURE;
2999 /* Paranoia check of maximum lengths of certain strings. There is a check
3000 on the length of the log file path in log.c, which will come into effect
3001 if there are any calls to write the log earlier than this. However, if we
3002 get this far but the string is very long, it is better to stop now than to
3003 carry on and (e.g.) receive a message and then have to collapse. The call to
3004 log_write() from here will cause the ultimate panic collapse if the complete
3005 file name exceeds the buffer length. */
3007 if (Ustrlen(log_file_path) > 200)
3008 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3009 "log_file_path is longer than 200 chars: aborting");
3011 if (Ustrlen(pid_file_path) > 200)
3012 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3013 "pid_file_path is longer than 200 chars: aborting");
3015 if (Ustrlen(spool_directory) > 200)
3016 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3017 "spool_directory is longer than 200 chars: aborting");
3019 /* Length check on the process name given to syslog for its TAG field,
3020 which is only permitted to be 32 characters or less. See RFC 3164. */
3022 if (Ustrlen(syslog_processname) > 32)
3023 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3024 "syslog_processname is longer than 32 chars: aborting");
3026 /* In some operating systems, the environment variable TMPDIR controls where
3027 temporary files are created; Exim doesn't use these (apart from when delivering
3028 to MBX mailboxes), but called libraries such as DBM libraries may require them.
3029 If TMPDIR is found in the environment, reset it to the value defined in the
3030 TMPDIR macro, if this macro is defined. */
3035 for (p = USS environ; *p != NULL; p++)
3037 if (Ustrncmp(*p, "TMPDIR=", 7) == 0 &&
3038 Ustrcmp(*p+7, TMPDIR) != 0)
3040 uschar *newp = malloc(Ustrlen(TMPDIR) + 8);
3041 sprintf(CS newp, "TMPDIR=%s", TMPDIR);
3043 DEBUG(D_any) debug_printf("reset TMPDIR=%s in environment\n", TMPDIR);
3049 /* Timezone handling. If timezone_string is "utc", set a flag to cause all
3050 timestamps to be in UTC (gmtime() is used instead of localtime()). Otherwise,
3051 we may need to get rid of a bogus timezone setting. This can arise when Exim is
3052 called by a user who has set the TZ variable. This then affects the timestamps
3053 in log files and in Received: headers, and any created Date: header lines. The
3054 required timezone is settable in the configuration file, so nothing can be done
3055 about this earlier - but hopefully nothing will normally be logged earlier than
3056 this. We have to make a new environment if TZ is wrong, but don't bother if
3057 timestamps_utc is set, because then all times are in UTC anyway. */
3059 if (timezone_string != NULL && strcmpic(timezone_string, US"UTC") == 0)
3061 timestamps_utc = TRUE;
3065 uschar *envtz = US getenv("TZ");
3066 if ((envtz == NULL && timezone_string != NULL) ||
3068 (timezone_string == NULL ||
3069 Ustrcmp(timezone_string, envtz) != 0)))
3071 uschar **p = USS environ;
3075 while (*p++ != NULL) count++;
3076 if (envtz == NULL) count++;
3077 newp = new = malloc(sizeof(uschar *) * (count + 1));
3078 for (p = USS environ; *p != NULL; p++)
3080 if (Ustrncmp(*p, "TZ=", 3) == 0) continue;
3083 if (timezone_string != NULL)
3085 *newp = malloc(Ustrlen(timezone_string) + 4);
3086 sprintf(CS *newp++, "TZ=%s", timezone_string);
3091 DEBUG(D_any) debug_printf("Reset TZ to %s: time is %s\n", timezone_string,
3092 tod_stamp(tod_log));
3096 /* Handle the case when we have removed the setuid privilege because of -C or
3097 -D. This means that the caller of Exim was not root, and, provided that
3098 ALT_CONFIG_ROOT_ONLY is not defined, was not the Exim user that is built into
3101 If ALT_CONFIG_ROOT_ONLY is not defined, there is a problem if it turns out we
3102 were running as the exim user defined in the configuration file (different to
3103 the one in the binary). The sysadmin may expect this case to retain privilege
3104 because "the binary was called by the Exim user", but it hasn't, because of the
3105 order in which it handles this stuff. There are two possibilities:
3107 (1) If deliver_drop_privilege is set, Exim is not going to re-exec in order
3108 to do message deliveries. Thus, the fact that it is running as a
3109 non-privileged user is plausible, and might be wanted in some special
3110 configurations. However, really_exim will have been set false when
3111 privilege was dropped, to stop Exim trying to write to its normal log
3112 files. Therefore, re-enable normal log processing, assuming the sysadmin
3113 has set up the log directory correctly.
3115 (2) If deliver_drop_privilege is not set, the configuration won't work as
3116 apparently intended, and so we log a panic message. In order to retain
3117 root for -C or -D, the caller must either be root or the Exim user
3118 defined in the binary (when deliver_drop_ privilege is false).
3120 If ALT_CONFIG_ROOT_ONLY is defined, we don't know whether we were called by the
3121 built-in exim user or one defined in the configuration. In either event,
3122 re-enable log processing, assuming the sysadmin knows what they are doing. */
3124 if (removed_privilege && (config_changed || macros != NULL) &&
3125 real_uid == exim_uid)
3127 #ifdef ALT_CONFIG_ROOT_ONLY
3128 really_exim = TRUE; /* let logging work normally */
3131 if (deliver_drop_privilege)
3132 really_exim = TRUE; /* let logging work normally */
3134 log_write(0, LOG_MAIN|LOG_PANIC,
3135 "exim user (uid=%d) is defined only at runtime; privilege lost for %s",
3136 (int)exim_uid, config_changed? "-C" : "-D");
3140 /* Start up Perl interpreter if Perl support is configured and there is a
3141 perl_startup option, and the configuration or the command line specifies
3142 initializing starting. Note that the global variables are actually called
3143 opt_perl_xxx to avoid clashing with perl's namespace (perl_*). */
3146 if (perl_start_option != 0)
3147 opt_perl_at_start = (perl_start_option > 0);
3148 if (opt_perl_at_start && opt_perl_startup != NULL)
3151 DEBUG(D_any) debug_printf("Starting Perl interpreter\n");
3152 errstr = init_perl(opt_perl_startup);
3155 fprintf(stderr, "exim: error in perl_startup code: %s\n", errstr);
3156 return EXIT_FAILURE;
3158 opt_perl_started = TRUE;
3160 #endif /* EXIM_PERL */
3162 /* Log the arguments of the call if the configuration file said so. This is
3163 a debugging feature for finding out what arguments certain MUAs actually use.
3164 Don't attempt it if logging is disabled, or if listing variables or if
3165 verifying/testing addresses or expansions. */
3167 if ((log_extra_selector & LX_arguments) != 0 && really_exim
3168 && !list_options && !checking)
3171 uschar *p = big_buffer;
3173 (void)getcwd(CS p+4, big_buffer_size - 4);
3175 (void)string_format(p, big_buffer_size - (p - big_buffer), " %d args:", argc);
3177 for (i = 0; i < argc; i++)
3179 int len = Ustrlen(argv[i]);
3182 if (p + len + 8 >= big_buffer + big_buffer_size)
3185 log_write(0, LOG_MAIN, "%s", big_buffer);
3186 Ustrcpy(big_buffer, "...");
3189 printing = string_printing(argv[i]);
3190 if (printing[0] == 0) quote = US"\""; else
3192 uschar *pp = printing;
3194 while (*pp != 0) if (isspace(*pp++)) { quote = US"\""; break; }
3196 sprintf(CS p, " %s%.*s%s", quote, (int)(big_buffer_size -
3197 (p - big_buffer) - 4), printing, quote);
3200 log_write(0, LOG_MAIN, "%s", big_buffer);
3203 /* Set the working directory to be the top-level spool directory. We don't rely
3204 on this in the code, which always uses fully qualified names, but it's useful
3205 for core dumps etc. Don't complain if it fails - the spool directory might not
3206 be generally accessible and calls with the -C option (and others) have lost
3207 privilege by now. */
3209 if (Uchdir(spool_directory) != 0)
3211 (void)directory_make(spool_directory, US"", SPOOL_DIRECTORY_MODE, TRUE);
3212 (void)Uchdir(spool_directory);
3215 /* Handle calls with the -bi option. This is a sendmail option to rebuild *the*
3216 alias file. Exim doesn't have such a concept, but this call is screwed into
3217 Sun's YP makefiles. Handle this by calling a configured script, as the real
3218 user who called Exim. The -oA option can be used to pass an argument to the
3223 fclose(config_file);
3224 if (bi_command != NULL)
3228 argv[i++] = bi_command;
3229 if (alias_arg != NULL) argv[i++] = alias_arg;
3232 setgroups(group_count, group_list);
3233 exim_setugid(real_uid, real_gid, FALSE, US"running bi_command");
3235 DEBUG(D_exec) debug_printf("exec %.256s %.256s\n", argv[0],
3236 (argv[1] == NULL)? US"" : argv[1]);
3238 execv(CS argv[0], (char *const *)argv);
3239 fprintf(stderr, "exim: exec failed: %s\n", strerror(errno));
3244 DEBUG(D_any) debug_printf("-bi used but bi_command not set; exiting\n");
3249 /* If an action on specific messages is requested, or if a daemon or queue
3250 runner is being started, we need to know if Exim was called by an admin user.
3251 This is the case if the real user is root or exim, or if the real group is
3252 exim, or if one of the supplementary groups is exim or a group listed in
3253 admin_groups. We don't fail all message actions immediately if not admin_user,
3254 since some actions can be performed by non-admin users. Instead, set admin_user
3255 for later interrogation. */
3257 if (real_uid == root_uid || real_uid == exim_uid || real_gid == exim_gid)
3263 for (i = 0; i < group_count; i++)
3265 if (group_list[i] == exim_gid) admin_user = TRUE;
3266 else if (admin_groups != NULL)
3268 for (j = 1; j <= (int)(admin_groups[0]); j++)
3269 if (admin_groups[j] == group_list[i])
3270 { admin_user = TRUE; break; }
3272 if (admin_user) break;
3276 /* Another group of privileged users are the trusted users. These are root,
3277 exim, and any caller matching trusted_users or trusted_groups. Trusted callers
3278 are permitted to specify sender_addresses with -f on the command line, and
3279 other message parameters as well. */
3281 if (real_uid == root_uid || real_uid == exim_uid)
3282 trusted_caller = TRUE;
3287 if (trusted_users != NULL)
3289 for (i = 1; i <= (int)(trusted_users[0]); i++)
3290 if (trusted_users[i] == real_uid)
3291 { trusted_caller = TRUE; break; }
3294 if (!trusted_caller && trusted_groups != NULL)
3296 for (i = 1; i <= (int)(trusted_groups[0]); i++)
3298 if (trusted_groups[i] == real_gid)
3299 trusted_caller = TRUE;
3300 else for (j = 0; j < group_count; j++)
3302 if (trusted_groups[i] == group_list[j])
3303 { trusted_caller = TRUE; break; }
3305 if (trusted_caller) break;
3310 if (trusted_caller) DEBUG(D_any) debug_printf("trusted user\n");
3311 if (admin_user) DEBUG(D_any) debug_printf("admin user\n");
3313 /* Only an admin user may start the daemon or force a queue run in the default
3314 configuration, but the queue run restriction can be relaxed. Only an admin
3315 user may request that a message be returned to its sender forthwith. Only an
3316 admin user may specify a debug level greater than D_v (because it might show
3317 passwords, etc. in lookup queries). Only an admin user may request a queue
3322 BOOL debugset = (debug_selector & ~D_v) != 0;
3323 if (deliver_give_up || daemon_listen ||
3324 (count_queue && queue_list_requires_admin) ||
3325 (list_queue && queue_list_requires_admin) ||
3326 (queue_interval >= 0 && prod_requires_admin) ||
3327 (debugset && !running_in_test_harness))
3329 fprintf(stderr, "exim:%s permission denied\n", debugset? " debugging" : "");
3334 /* If the real user is not root or the exim uid, the argument for passing
3335 in an open TCP/IP connection for another message is not permitted, nor is
3336 running with the -N option for any delivery action, unless this call to exim is
3337 one that supplied an input message, or we are using a patched exim for
3338 regression testing. */
3340 if (real_uid != root_uid && real_uid != exim_uid &&
3341 (continue_hostname != NULL ||
3343 (queue_interval >= 0 || daemon_listen || msg_action_arg > 0)
3344 )) && !running_in_test_harness)
3346 fprintf(stderr, "exim: Permission denied\n");
3347 return EXIT_FAILURE;
3350 /* If the caller is not trusted, certain arguments are ignored when running for
3351 real, but are permitted when checking things (-be, -bv, -bt, -bh, -bf). Note
3352 that authority for performing certain actions on messages is tested in the
3353 queue_action() function. */
3355 if (!trusted_caller && !checking && filter_test == NULL)
3357 sender_host_name = sender_host_address = interface_address =
3358 sender_ident = received_protocol = NULL;
3359 sender_host_port = interface_port = 0;
3360 sender_host_authenticated = authenticated_sender = authenticated_id = NULL;
3363 /* If a sender host address is set, extract the optional port number off the
3364 end of it and check its syntax. Do the same thing for the interface address.
3365 Exim exits if the syntax is bad. */
3369 if (sender_host_address != NULL)
3370 sender_host_port = check_port(sender_host_address);
3371 if (interface_address != NULL)
3372 interface_port = check_port(interface_address);
3375 /* If an SMTP message is being received check to see if the standard input is a
3376 TCP/IP socket. If it is, we assume that Exim was called from inetd if the
3377 caller is root or the Exim user, or if the port is a privileged one. Otherwise,
3382 union sockaddr_46 inetd_sock;
3383 SOCKLEN_T size = sizeof(inetd_sock);
3384 if (getpeername(0, (struct sockaddr *)(&inetd_sock), &size) == 0)
3386 int family = ((struct sockaddr *)(&inetd_sock))->sa_family;
3387 if (family == AF_INET || family == AF_INET6)
3389 union sockaddr_46 interface_sock;
3390 size = sizeof(interface_sock);
3392 if (getsockname(0, (struct sockaddr *)(&interface_sock), &size) == 0)
3393 interface_address = host_ntoa(-1, &interface_sock, NULL,
3396 if (host_is_tls_on_connect_port(interface_port)) tls_on_connect = TRUE;
3398 if (real_uid == root_uid || real_uid == exim_uid || interface_port < 1024)
3401 sender_host_address = host_ntoa(-1, (struct sockaddr *)(&inetd_sock),
3402 NULL, &sender_host_port);
3403 if (mua_wrapper) log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Input from "
3404 "inetd is not supported when mua_wrapper is set");
3409 "exim: Permission denied (unprivileged user, unprivileged port)\n");
3410 return EXIT_FAILURE;
3416 /* If the load average is going to be needed while receiving a message, get it
3417 now for those OS that require the first call to os_getloadavg() to be done as
3418 root. There will be further calls later for each message received. */
3420 #ifdef LOAD_AVG_NEEDS_ROOT
3421 if (receiving_message &&
3422 (queue_only_load >= 0 ||
3423 (is_inetd && smtp_load_reserve >= 0)
3426 load_average = os_getloadavg();
3430 /* The queue_only configuration option can be overridden by -odx on the command
3431 line, except that if queue_only_override is false, queue_only cannot be unset
3432 from the command line. */
3434 if (queue_only_set && (queue_only_override || arg_queue_only))
3435 queue_only = arg_queue_only;
3437 /* The receive_timeout and smtp_receive_timeout options can be overridden by
3440 if (arg_receive_timeout >= 0) receive_timeout = arg_receive_timeout;
3441 if (arg_smtp_receive_timeout >= 0)
3442 smtp_receive_timeout = arg_smtp_receive_timeout;
3444 /* If Exim was started with root privilege, unless we have already removed the
3445 root privilege above as a result of -C, -D, -be, -bf or -bF, remove it now
3446 except when starting the daemon or doing some kind of delivery or address
3447 testing (-bt). These are the only cases when root need to be retained. We run
3448 as exim for -bv and -bh. However, if deliver_drop_privilege is set, root is
3449 retained only for starting the daemon. */
3451 if (!unprivileged && /* originally had root AND */
3452 !removed_privilege && /* still got root AND */
3453 !daemon_listen && /* not starting the daemon */
3454 queue_interval <= 0 && /* (either kind of daemon) */
3456 deliver_drop_privilege || /* requested unprivileged */
3458 queue_interval < 0 && /* not running the queue */
3459 (msg_action_arg < 0 || /* and */
3460 msg_action != MSG_DELIVER) && /* not delivering and */
3461 (!checking || !address_test_mode) /* not address checking */
3465 exim_setugid(exim_uid, exim_gid, FALSE, US"privilege not needed");
3468 /* When we are retaining a privileged uid, we still change to the exim gid. */
3470 else setgid(exim_gid);
3472 /* Handle a request to list the delivery queue */
3476 set_process_info("listing the queue");
3477 queue_list(list_queue_option, argv + recipients_arg, argc - recipients_arg);
3481 /* Handle a request to count the delivery queue */
3485 set_process_info("counting the queue");
3490 /* Handle actions on specific messages, except for the force delivery action,
3491 which is done below. Some actions take a whole list of message ids, which
3492 are known to continue up to the end of the arguments. Others take a single
3493 message id and then operate on the recipients list. */
3495 if (msg_action_arg > 0 && msg_action != MSG_DELIVER)
3497 int yield = EXIT_SUCCESS;
3498 set_process_info("acting on specified messages");
3500 if (!one_msg_action)
3502 for (i = msg_action_arg; i < argc; i++)
3503 if (!queue_action(argv[i], msg_action, NULL, 0, 0))
3504 yield = EXIT_FAILURE;
3507 else if (!queue_action(argv[msg_action_arg], msg_action, argv, argc,
3508 recipients_arg)) yield = EXIT_FAILURE;
3512 /* All the modes below here require the remaining configuration sections
3513 to be read, except that we can skip over the ACL setting when delivering
3514 specific messages, or doing a queue run. (For various testing cases we could
3515 skip too, but as they are rare, it doesn't really matter.) The argument is TRUE
3518 readconf_rest(msg_action_arg > 0 || (queue_interval == 0 && !daemon_listen));
3520 /* The configuration data will have been read into POOL_PERM because we won't
3521 ever want to reset back past it. Change the current pool to POOL_MAIN. In fact,
3522 this is just a bit of pedantic tidiness. It wouldn't really matter if the
3523 configuration were read into POOL_MAIN, because we don't do any resets till
3524 later on. However, it seems right, and it does ensure that both pools get used.
3527 store_pool = POOL_MAIN;
3529 /* Handle the -brt option. This is for checking out retry configurations.
3530 The next three arguments are a domain name or a complete address, and
3531 optionally two error numbers. All it does is to call the function that
3532 scans the retry configuration data. */
3534 if (test_retry_arg >= 0)
3536 retry_config *yield;
3537 int basic_errno = 0;
3541 if (test_retry_arg >= argc)
3543 printf("-brt needs a domain or address argument\n");
3544 exim_exit(EXIT_FAILURE);
3546 s1 = argv[test_retry_arg++];
3549 /* If the first argument contains no @ and no . it might be a local user
3550 or it might be a single-component name. Treat as a domain. */
3552 if (Ustrchr(s1, '@') == NULL && Ustrchr(s1, '.') == NULL)
3554 printf("Warning: \"%s\" contains no '@' and no '.' characters. It is "
3555 "being \ntreated as a one-component domain, not as a local part.\n\n",
3559 /* There may be an optional second domain arg. */
3561 if (test_retry_arg < argc && Ustrchr(argv[test_retry_arg], '.') != NULL)
3562 s2 = argv[test_retry_arg++];
3564 /* The final arg is an error name */
3566 if (test_retry_arg < argc)
3568 uschar *ss = argv[test_retry_arg];
3570 readconf_retry_error(ss, ss + Ustrlen(ss), &basic_errno, &more_errno);
3573 printf("%s\n", CS error);
3574 return EXIT_FAILURE;
3577 /* For the rcpt_4xx errors, a value of 255 means "any", and a code > 100 as
3578 an error is for matching codes to the decade. Turn them into a real error
3579 code, off the decade. */
3581 if (basic_errno == ERRNO_RCPT4XX)
3583 int code = (more_errno >> 8) & 255;
3585 more_errno = (more_errno & 0xffff00ff) | (21 << 8);
3586 else if (code > 100)
3587 more_errno = (more_errno & 0xffff00ff) | ((code - 96) << 8);
3591 yield = retry_find_config(s1, s2, basic_errno, more_errno);
3592 if (yield == NULL) printf("No retry information found\n"); else
3595 more_errno = yield->more_errno;
3596 printf("Retry rule: %s ", yield->pattern);
3598 if (yield->basic_errno == ERRNO_EXIMQUOTA)
3600 printf("quota%s%s ",
3601 (more_errno > 0)? "_" : "",
3602 (more_errno > 0)? readconf_printtime(more_errno) : US"");
3604 else if (yield->basic_errno == ECONNREFUSED)
3606 printf("refused%s%s ",
3607 (more_errno > 0)? "_" : "",
3608 (more_errno == 'M')? "MX" :
3609 (more_errno == 'A')? "A" : "");
3611 else if (yield->basic_errno == ETIMEDOUT)
3614 if ((more_errno & RTEF_CTOUT) != 0) printf("_connect");
3616 if (more_errno != 0) printf("_%s",
3617 (more_errno == 'M')? "MX" : "A");
3620 else if (yield->basic_errno == ERRNO_AUTHFAIL)
3621 printf("auth_failed ");
3624 for (r = yield->rules; r != NULL; r = r->next)
3626 printf("%c,%s", r->rule, readconf_printtime(r->timeout)); /* Do not */
3627 printf(",%s", readconf_printtime(r->p1)); /* amalgamate */
3633 printf(",%d.", x/1000);
3647 exim_exit(EXIT_SUCCESS);
3650 /* Handle a request to list one or more configuration options */
3654 set_process_info("listing variables");
3655 if (recipients_arg >= argc) readconf_print(US"all", NULL);
3656 else for (i = recipients_arg; i < argc; i++)
3659 (Ustrcmp(argv[i], "router") == 0 ||
3660 Ustrcmp(argv[i], "transport") == 0 ||
3661 Ustrcmp(argv[i], "authenticator") == 0))
3663 readconf_print(argv[i+1], argv[i]);
3666 else readconf_print(argv[i], NULL);
3668 exim_exit(EXIT_SUCCESS);
3672 /* Handle a request to deliver one or more messages that are already on the
3673 queue. Values of msg_action other than MSG_DELIVER are dealt with above. This
3674 is typically used for a small number when prodding by hand (when the option
3675 forced_delivery will be set) or when re-execing to regain root privilege.
3676 Each message delivery must happen in a separate process, so we fork a process
3677 for each one, and run them sequentially so that debugging output doesn't get
3678 intertwined, and to avoid spawning too many processes if a long list is given.
3679 However, don't fork for the last one; this saves a process in the common case
3680 when Exim is called to deliver just one message. */
3682 if (msg_action_arg > 0)
3684 if (prod_requires_admin && !admin_user)
3686 fprintf(stderr, "exim: Permission denied\n");
3687 exim_exit(EXIT_FAILURE);
3689 set_process_info("delivering specified messages");
3690 if (deliver_give_up) forced_delivery = deliver_force_thaw = TRUE;
3691 for (i = msg_action_arg; i < argc; i++)
3696 (void)deliver_message(argv[i], forced_delivery, deliver_give_up);
3697 else if ((pid = fork()) == 0)
3699 (void)deliver_message(argv[i], forced_delivery, deliver_give_up);
3700 _exit(EXIT_SUCCESS);
3704 fprintf(stderr, "failed to fork delivery process for %s: %s\n", argv[i],
3706 exim_exit(EXIT_FAILURE);
3710 exim_exit(EXIT_SUCCESS);
3714 /* If only a single queue run is requested, without SMTP listening, we can just
3715 turn into a queue runner, with an optional starting message id. */
3717 if (queue_interval == 0 && !daemon_listen)
3719 DEBUG(D_queue_run) debug_printf("Single queue run%s%s%s%s\n",
3720 (start_queue_run_id == NULL)? US"" : US" starting at ",
3721 (start_queue_run_id == NULL)? US"" : start_queue_run_id,
3722 (stop_queue_run_id == NULL)? US"" : US" stopping at ",
3723 (stop_queue_run_id == NULL)? US"" : stop_queue_run_id);
3724 set_process_info("running the queue (single queue run)");
3725 queue_run(start_queue_run_id, stop_queue_run_id, FALSE);
3726 exim_exit(EXIT_SUCCESS);
3730 /* Find the login name of the real user running this process. This is always
3731 needed when receiving a message, because it is written into the spool file. It
3732 may also be used to construct a from: or a sender: header, and in this case we
3733 need the user's full name as well, so save a copy of it, checked for RFC822
3734 syntax and munged if necessary, if it hasn't previously been set by the -F
3735 argument. We may try to get the passwd entry more than once, in case NIS or
3736 other delays are in evidence. Save the home directory for use in filter testing
3741 if ((pw = getpwuid(real_uid)) != NULL)
3743 originator_login = string_copy(US pw->pw_name);
3744 originator_home = string_copy(US pw->pw_dir);
3746 /* If user name has not been set by -F, set it from the passwd entry
3747 unless -f has been used to set the sender address by a trusted user. */
3749 if (originator_name == NULL)
3751 if (sender_address == NULL ||
3752 (!trusted_caller && filter_test == NULL))
3754 uschar *name = US pw->pw_gecos;
3755 uschar *amp = Ustrchr(name, '&');
3758 /* Most Unix specify that a '&' character in the gecos field is
3759 replaced by a copy of the login name, and some even specify that
3760 the first character should be upper cased, so that's what we do. */
3765 string_format(buffer, sizeof(buffer), "%.*s%n%s%s",
3766 amp - name, name, &loffset, originator_login, amp + 1);
3767 buffer[loffset] = toupper(buffer[loffset]);
3771 /* If a pattern for matching the gecos field was supplied, apply
3772 it and then expand the name string. */
3774 if (gecos_pattern != NULL && gecos_name != NULL)
3777 re = regex_must_compile(gecos_pattern, FALSE, TRUE); /* Use malloc */
3779 if (regex_match_and_setup(re, name, 0, -1))
3781 uschar *new_name = expand_string(gecos_name);
3783 if (new_name != NULL)
3785 DEBUG(D_receive) debug_printf("user name \"%s\" extracted from "
3786 "gecos field \"%s\"\n", new_name, name);
3789 else DEBUG(D_receive) debug_printf("failed to expand gecos_name string "
3790 "\"%s\": %s\n", gecos_name, expand_string_message);
3792 else DEBUG(D_receive) debug_printf("gecos_pattern \"%s\" did not match "
3793 "gecos field \"%s\"\n", gecos_pattern, name);
3794 store_free((void *)re);
3796 originator_name = string_copy(name);
3799 /* A trusted caller has used -f but not -F */
3801 else originator_name = US"";
3804 /* Break the retry loop */
3809 if (++i > finduser_retries) break;
3813 /* If we cannot get a user login, log the incident and give up, unless the
3814 configuration specifies something to use. When running in the test harness,
3815 any setting of unknown_login overrides the actual login name. */
3817 if (originator_login == NULL || running_in_test_harness)
3819 if (unknown_login != NULL)
3821 originator_login = expand_string(unknown_login);
3822 if (originator_name == NULL && unknown_username != NULL)
3823 originator_name = expand_string(unknown_username);
3824 if (originator_name == NULL) originator_name = US"";
3826 if (originator_login == NULL)
3827 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Failed to get user name for uid %d",
3831 /* Ensure that the user name is in a suitable form for use as a "phrase" in an
3834 originator_name = string_copy(parse_fix_phrase(originator_name,
3835 Ustrlen(originator_name), big_buffer, big_buffer_size));
3837 /* If a message is created by this call of Exim, the uid/gid of its originator
3838 are those of the caller. These values are overridden if an existing message is
3839 read in from the spool. */
3841 originator_uid = real_uid;
3842 originator_gid = real_gid;
3844 DEBUG(D_receive) debug_printf("originator: uid=%d gid=%d login=%s name=%s\n",
3845 (int)originator_uid, (int)originator_gid, originator_login, originator_name);
3847 /* Run in daemon and/or queue-running mode. The function daemon_go() never
3848 returns. We leave this till here so that the originator_ fields are available
3849 for incoming messages via the daemon. */
3851 if (daemon_listen || queue_interval > 0)
3853 if (mua_wrapper) log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Daemon cannot be "
3854 "run when mua_wrapper is set");
3858 /* If the sender ident has not been set (by a trusted caller) set it to
3859 the caller. This will get overwritten below for an inetd call. If a trusted
3860 caller has set it empty, unset it. */
3862 if (sender_ident == NULL) sender_ident = originator_login;
3863 else if (sender_ident[0] == 0) sender_ident = NULL;
3865 /* Handle the -brw option, which is for checking out rewriting rules. Cause log
3866 writes (on errors) to go to stderr instead. Can't do this earlier, as want the
3867 originator_* variables set. */
3869 if (test_rewrite_arg >= 0)
3871 really_exim = FALSE;
3872 if (test_rewrite_arg >= argc)
3874 printf("-brw needs an address argument\n");
3875 exim_exit(EXIT_FAILURE);
3877 rewrite_test(argv[test_rewrite_arg]);
3878 exim_exit(EXIT_SUCCESS);
3881 /* A locally-supplied message is considered to be coming from a local user
3882 unless a trusted caller supplies a sender address with -f, or is passing in the
3883 message via SMTP (inetd invocation or otherwise). */
3885 if ((sender_address == NULL && !smtp_input) ||
3886 (!trusted_caller && filter_test == NULL))
3888 sender_local = TRUE;
3890 /* A trusted caller can supply authenticated_sender and authenticated_id
3891 via -oMas and -oMai and if so, they will already be set. */
3893 if (authenticated_sender == NULL)
3894 authenticated_sender = string_sprintf("%s@%s", originator_login,
3895 qualify_domain_sender);
3896 if (authenticated_id == NULL) authenticated_id = originator_login;
3899 /* Trusted callers are always permitted to specify the sender address.
3900 Untrusted callers may specify it if it matches untrusted_set_sender, or if what
3901 is specified is the empty address. However, if a trusted caller does not
3902 specify a sender address for SMTP input, we leave sender_address unset. This
3903 causes the MAIL commands to be honoured. */
3905 if ((!smtp_input && sender_address == NULL) ||
3906 !receive_check_set_sender(sender_address))
3908 /* Either the caller is not permitted to set a general sender, or this is
3909 non-SMTP input and the trusted caller has not set a sender. If there is no
3910 sender, or if a sender other than <> is set, override with the originator's
3911 login (which will get qualified below), except when checking things. */
3913 if (sender_address == NULL /* No sender_address set */
3915 (sender_address[0] != 0 && /* Non-empty sender address, AND */
3916 !checking && /* Not running tests, AND */
3917 filter_test == NULL)) /* Not testing a filter */
3919 sender_address = originator_login;
3920 sender_address_forced = FALSE;
3921 sender_address_domain = 0;
3925 /* Remember whether an untrusted caller set the sender address */
3927 sender_set_untrusted = sender_address != originator_login && !trusted_caller;
3929 /* Ensure that the sender address is fully qualified unless it is the empty
3930 address, which indicates an error message, or doesn't exist (root caller, smtp
3931 interface, no -f argument). */
3933 if (sender_address != NULL && sender_address[0] != 0 &&
3934 sender_address_domain == 0)
3935 sender_address = string_sprintf("%s@%s", local_part_quote(sender_address),
3936 qualify_domain_sender);
3938 DEBUG(D_receive) debug_printf("sender address = %s\n", sender_address);
3940 /* Handle a request to verify a list of addresses, or test them for delivery.
3941 This must follow the setting of the sender address, since routers can be
3942 predicated upon the sender. If no arguments are given, read addresses from
3943 stdin. Set debug_level to at least D_v to get full output for address testing.
3946 if (verify_address_mode || address_test_mode)
3949 int flags = vopt_qualify;
3951 if (verify_address_mode)
3953 if (!verify_as_sender) flags |= vopt_is_recipient;
3954 DEBUG(D_verify) debug_print_ids(US"Verifying:");
3959 flags |= vopt_is_recipient;
3960 debug_selector |= D_v;
3961 debug_file = stderr;
3962 debug_fd = fileno(debug_file);
3963 DEBUG(D_verify) debug_print_ids(US"Address testing:");
3966 if (recipients_arg < argc)
3968 while (recipients_arg < argc)
3970 uschar *s = argv[recipients_arg++];
3973 BOOL finished = FALSE;
3974 uschar *ss = parse_find_address_end(s, FALSE);
3975 if (*ss == ',') *ss = 0; else finished = TRUE;
3976 test_address(s, flags, &exit_value);
3979 while (*(++s) != 0 && (*s == ',' || isspace(*s)));
3986 uschar *s = get_stdinput(NULL, NULL);
3987 if (s == NULL) break;
3988 test_address(s, flags, &exit_value);
3992 exim_exit(exit_value);
3995 /* Handle expansion checking */
3999 if (recipients_arg < argc)
4001 while (recipients_arg < argc)
4003 uschar *s = argv[recipients_arg++];
4004 uschar *ss = expand_string(s);
4006 printf ("Failed: %s\n", expand_string_message);
4007 else printf("%s\n", CS ss);
4015 char *(*fn_readline)(char *) = NULL;
4016 char *(*fn_addhist)(char *) = NULL;
4019 void *dlhandle = set_readline(&fn_readline, &fn_addhist);
4025 uschar *source = get_stdinput(fn_readline, fn_addhist);
4026 if (source == NULL) break;
4027 ss = expand_string(source);
4029 printf ("Failed: %s\n", expand_string_message);
4030 else printf("%s\n", CS ss);
4034 if (dlhandle != NULL) dlclose(dlhandle);
4038 exim_exit(EXIT_SUCCESS);
4042 /* The active host name is normally the primary host name, but it can be varied
4043 for hosts that want to play several parts at once. We need to ensure that it is
4044 set for host checking, and for receiving messages. */
4046 smtp_active_hostname = primary_hostname;
4047 if (raw_active_hostname != NULL)
4049 uschar *nah = expand_string(raw_active_hostname);
4052 if (!expand_string_forcedfail)
4053 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to expand \"%s\" "
4054 "(smtp_active_hostname): %s", raw_active_hostname,
4055 expand_string_message);
4057 else if (nah[0] != 0) smtp_active_hostname = nah;
4060 /* Handle host checking: this facility mocks up an incoming SMTP call from a
4061 given IP address so that the blocking and relay configuration can be tested. An
4062 RFC 1413 call is made only if we are running in the test harness and an
4063 incoming interface and both ports are specified, because there is no TCP/IP
4064 call to find the ident for. */
4068 sender_ident = NULL;
4069 if (running_in_test_harness && sender_host_port != 0 &&
4070 interface_address != NULL && interface_port != 0)
4071 verify_get_ident(1413);
4073 host_build_sender_fullhost();
4077 sender_local = FALSE;
4078 sender_host_notsocket = TRUE;
4079 debug_file = stderr;
4080 debug_fd = fileno(debug_file);
4081 fprintf(stdout, "\n**** SMTP testing session as if from host %s\n"
4082 "**** but without any ident (RFC 1413) callback.\n"
4083 "**** This is not for real!\n\n",
4084 sender_host_address);
4086 if (verify_check_host(&hosts_connection_nolog) == OK)
4087 log_write_selector &= ~L_smtp_connection;
4088 log_write(L_smtp_connection, LOG_MAIN, "%s", smtp_get_connection_info());
4090 if (smtp_start_session())
4092 reset_point = store_get(0);
4095 store_reset(reset_point);
4096 if (smtp_setup_msg() <= 0) break;
4097 if (!receive_msg(FALSE)) break;
4100 exim_exit(EXIT_SUCCESS);
4104 /* Arrange for message reception if recipients or SMTP were specified;
4105 otherwise complain unless a version print (-bV) happened or this is a filter
4106 verification test. In the former case, show the configuration file name. */
4108 if (recipients_arg >= argc && !extract_recipients && !smtp_input)
4110 if (version_printed)
4112 printf("Configuration file is %s\n", config_main_filename);
4113 return EXIT_SUCCESS;
4115 if (filter_test == NULL)
4118 "Exim is a Mail Transfer Agent. It is normally called by Mail User Agents,\n"
4119 "not directly from a shell command line. Options and/or arguments control\n"
4120 "what it does when called. For a list of options, see the Exim documentation.\n");
4121 return EXIT_FAILURE;
4126 /* If mua_wrapper is set, Exim is being used to turn an MUA that submits on the
4127 standard input into an MUA that submits to a smarthost over TCP/IP. We know
4128 that we are not called from inetd, because that is rejected above. The
4129 following configuration settings are forced here:
4131 (1) Synchronous delivery (-odi)
4132 (2) Errors to stderr (-oep == -oeq)
4133 (3) No parallel remote delivery
4134 (4) Unprivileged delivery
4136 We don't force overall queueing options because there are several of them;
4137 instead, queueing is avoided below when mua_wrapper is set. However, we do need
4138 to override any SMTP queueing. */
4142 synchronous_delivery = TRUE;
4143 arg_error_handling = ERRORS_STDERR;
4144 remote_max_parallel = 1;
4145 deliver_drop_privilege = TRUE;
4147 queue_smtp_domains = NULL;
4151 /* Prepare to accept one or more new messages on the standard input. When a
4152 message has been read, its id is returned in message_id[]. If doing immediate
4153 delivery, we fork a delivery process for each received message, except for the
4154 last one, where we can save a process switch.
4156 It is only in non-smtp mode that error_handling is allowed to be changed from
4157 its default of ERRORS_SENDER by argument. (Idle thought: are any of the
4158 sendmail error modes other than -oem ever actually used? Later: yes.) */
4160 if (!smtp_input) error_handling = arg_error_handling;
4162 /* If this is an inetd call, ensure that stderr is closed to prevent panic
4163 logging being sent down the socket and make an identd call to get the
4169 exim_nullstd(); /* Re-open to /dev/null */
4170 verify_get_ident(IDENT_PORT);
4171 host_build_sender_fullhost();
4172 set_process_info("handling incoming connection from %s via inetd",
4176 /* If the sender host address has been set, build sender_fullhost if it hasn't
4177 already been done (which it will have been for inetd). This caters for the
4178 case when it is forced by -oMa. However, we must flag that it isn't a socket,
4179 so that the test for IP options is skipped for -bs input. */
4181 if (sender_host_address != NULL && sender_fullhost == NULL)
4183 host_build_sender_fullhost();
4184 set_process_info("handling incoming connection from %s via -oMa",
4186 sender_host_notsocket = TRUE;
4189 /* Otherwise, set the sender host as unknown except for inetd calls. This
4190 prevents host checking in the case of -bs not from inetd and also for -bS. */
4192 else if (!is_inetd) sender_host_unknown = TRUE;
4194 /* If stdout does not exist, then dup stdin to stdout. This can happen
4195 if exim is started from inetd. In this case fd 0 will be set to the socket,
4196 but fd 1 will not be set. This also happens for passed SMTP channels. */
4198 if (fstat(1, &statbuf) < 0) dup2(0, 1);
4200 /* Set up the incoming protocol name and the state of the program. Root
4201 is allowed to force received protocol via the -oMr option above, and if we are
4202 in a non-local SMTP state it means we have come via inetd and the process info
4203 has already been set up. We don't set received_protocol here for smtp input,
4204 as it varies according to batch/HELO/EHLO/AUTH/TLS. */
4208 if (sender_local) set_process_info("accepting a local SMTP message from <%s>",
4213 if (received_protocol == NULL)
4214 received_protocol = string_sprintf("local%s", called_as);
4215 set_process_info("accepting a local non-SMTP message from <%s>",
4219 /* Initialize the local_queue-only flag (this will be ignored if mua_wrapper is
4223 local_queue_only = queue_only;
4225 /* For non-SMTP and for batched SMTP input, check that there is enough space on
4226 the spool if so configured. On failure, we must not attempt to send an error
4227 message! (For interactive SMTP, the check happens at MAIL FROM and an SMTP
4228 error code is given.) */
4230 if ((!smtp_input || smtp_batched_input) && !receive_check_fs(0))
4232 fprintf(stderr, "exim: insufficient disk space\n");
4233 return EXIT_FAILURE;
4236 /* If this is smtp input of any kind, handle the start of the SMTP
4243 if (verify_check_host(&hosts_connection_nolog) == OK)
4244 log_write_selector &= ~L_smtp_connection;
4245 log_write(L_smtp_connection, LOG_MAIN, "%s", smtp_get_connection_info());
4246 if (!smtp_start_session())
4249 exim_exit(EXIT_SUCCESS);
4253 /* Otherwise, set up the input size limit here */
4257 thismessage_size_limit = expand_string_integer(message_size_limit);
4258 if (thismessage_size_limit < 0)
4260 if (thismessage_size_limit == -1)
4261 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to expand "
4262 "message_size_limit: %s", expand_string_message);
4264 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "invalid value for "
4265 "message_size_limit: %s", expand_string_message);
4269 /* Loop for several messages when reading SMTP input. If we fork any child
4270 processes, we don't want to wait for them unless synchronous delivery is
4271 requested, so set SIGCHLD to SIG_IGN in that case. This is not necessarily the
4272 same as SIG_DFL, despite the fact that documentation often lists the default as
4273 "ignore". This is a confusing area. This is what I know:
4275 At least on some systems (e.g. Solaris), just setting SIG_IGN causes child
4276 processes that complete simply to go away without ever becoming defunct. You
4277 can't then wait for them - but we don't want to wait for them in the
4278 non-synchronous delivery case. However, this behaviour of SIG_IGN doesn't
4279 happen for all OS (e.g. *BSD is different).
4281 But that's not the end of the story. Some (many? all?) systems have the
4282 SA_NOCLDWAIT option for sigaction(). This requests the behaviour that Solaris
4283 has by default, so it seems that the difference is merely one of default
4284 (compare restarting vs non-restarting signals).
4286 To cover all cases, Exim sets SIG_IGN with SA_NOCLDWAIT here if it can. If not,
4287 it just sets SIG_IGN. To be on the safe side it also calls waitpid() at the end
4288 of the loop below. Paranoia rules.
4290 February 2003: That's *still* not the end of the story. There are now versions
4291 of Linux (where SIG_IGN does work) that are picky. If, having set SIG_IGN, a
4292 process then calls waitpid(), a grumble is written to the system log, because
4293 this is logically inconsistent. In other words, it doesn't like the paranoia.
4294 As a consequenc of this, the waitpid() below is now excluded if we are sure
4295 that SIG_IGN works. */
4297 if (!synchronous_delivery)
4300 struct sigaction act;
4301 act.sa_handler = SIG_IGN;
4302 sigemptyset(&(act.sa_mask));
4303 act.sa_flags = SA_NOCLDWAIT;
4304 sigaction(SIGCHLD, &act, NULL);
4306 signal(SIGCHLD, SIG_IGN);
4310 /* Save the current store pool point, for resetting at the start of
4311 each message, and save the real sender address, if any. */
4313 reset_point = store_get(0);
4314 real_sender_address = sender_address;
4316 /* Loop to receive messages; receive_msg() returns TRUE if there are more
4317 messages to be read (SMTP input), or FALSE otherwise (not SMTP, or SMTP channel
4322 store_reset(reset_point);
4325 /* In the SMTP case, we have to handle the initial SMTP input and build the
4326 recipients list, before calling receive_msg() to read the message proper.
4327 Whatever sender address is actually given in the SMTP transaction is
4328 actually ignored for local senders - we use the actual sender, which is
4329 normally either the underlying user running this process or a -f argument
4330 provided by a trusted caller. It is saved in real_sender_address.
4332 However, if this value is NULL, we are dealing with a trusted caller when
4333 -f was not used; in this case, the SMTP sender is allowed to stand.
4335 Also, if untrusted_set_sender is set, we permit sender addresses that match
4336 anything in its list.
4338 The variable raw_sender_address holds the sender address before rewriting. */
4343 if ((rc = smtp_setup_msg()) > 0)
4345 if (real_sender_address != NULL &&
4346 !receive_check_set_sender(sender_address))
4348 sender_address = raw_sender = real_sender_address;
4349 sender_address_unrewritten = NULL;
4351 more = receive_msg(extract_recipients);
4352 if (message_id[0] == 0)
4355 exim_exit(EXIT_FAILURE);
4358 else exim_exit((rc == 0)? EXIT_SUCCESS : EXIT_FAILURE);
4361 /* In the non-SMTP case, we have all the information from the command
4362 line, but must process it in case it is in the more general RFC822
4363 format, and in any case, to detect syntax errors. Also, it appears that
4364 the use of comma-separated lists as single arguments is common, so we
4365 had better support them. */
4371 int count = argc - recipients_arg;
4372 uschar **list = argv + recipients_arg;
4374 /* Save before any rewriting */
4376 raw_sender = string_copy(sender_address);
4378 /* Loop for each argument */
4380 for (i = 0; i < count; i++)
4382 int start, end, domain;
4384 uschar *s = list[i];
4386 /* Loop for each comma-separated address */
4390 BOOL finished = FALSE;
4392 uschar *ss = parse_find_address_end(s, FALSE);
4394 if (*ss == ',') *ss = 0; else finished = TRUE;
4396 /* Check max recipients - if -t was used, these aren't recipients */
4398 if (recipients_max > 0 && ++rcount > recipients_max &&
4399 !extract_recipients)
4401 if (error_handling == ERRORS_STDERR)
4403 fprintf(stderr, "exim: too many recipients\n");
4404 exim_exit(EXIT_FAILURE);
4409 moan_to_sender(ERRMESS_TOOMANYRECIP, NULL, NULL, stdin, TRUE)?
4410 errors_sender_rc : EXIT_FAILURE;
4415 parse_extract_address(s, &errmess, &start, &end, &domain, FALSE);
4417 if (domain == 0 && !allow_unqualified_recipient)
4420 errmess = US"unqualified recipient address not allowed";
4423 if (recipient == NULL)
4425 if (error_handling == ERRORS_STDERR)
4427 fprintf(stderr, "exim: bad recipient address \"%s\": %s\n",
4428 string_printing(list[i]), errmess);
4429 exim_exit(EXIT_FAILURE);
4435 eblock.text1 = string_printing(list[i]);
4436 eblock.text2 = errmess;
4438 moan_to_sender(ERRMESS_BADARGADDRESS, &eblock, NULL, stdin, TRUE)?
4439 errors_sender_rc : EXIT_FAILURE;
4443 receive_add_recipient(recipient, -1);
4446 while (*(++s) != 0 && (*s == ',' || isspace(*s)));
4450 /* Show the recipients when debugging */
4455 if (sender_address != NULL) debug_printf("Sender: %s\n", sender_address);
4456 if (recipients_list != NULL)
4458 debug_printf("Recipients:\n");
4459 for (i = 0; i < recipients_count; i++)
4460 debug_printf(" %s\n", recipients_list[i].address);
4464 /* Read the data for the message. If filter_test is true, this will
4465 just read the headers for the message, and not write anything onto
4468 message_ended = END_NOTENDED;
4469 more = receive_msg(extract_recipients);
4471 /* more is always FALSE here (not SMTP message) when reading a message
4472 for real; when reading the headers of a message for filter testing,
4473 it is TRUE if the headers were terminated by '.' and FALSE otherwise. */
4475 if (message_id[0] == 0) exim_exit(EXIT_FAILURE);
4476 } /* Non-SMTP message reception */
4478 /* If this is a filter testing run, there are headers in store, but
4479 no message on the spool. Run the filtering code in testing mode, setting
4480 the domain to the qualify domain and the local part to the current user,
4481 unless they have been set by options. The prefix and suffix are left unset
4482 unless specified. The the return path is set to to the sender unless it has
4483 already been set from a return-path header in the message. */
4485 if (filter_test != NULL)
4487 deliver_domain = (ftest_domain != NULL)?
4488 ftest_domain : qualify_domain_recipient;
4489 deliver_domain_orig = deliver_domain;
4490 deliver_localpart = (ftest_localpart != NULL)?
4491 ftest_localpart : originator_login;
4492 deliver_localpart_orig = deliver_localpart;
4493 deliver_localpart_prefix = ftest_prefix;
4494 deliver_localpart_suffix = ftest_suffix;
4495 deliver_home = originator_home;
4497 if (return_path == NULL)
4499 printf("Return-path copied from sender\n");
4500 return_path = string_copy(sender_address);
4504 printf("Return-path = %s\n", (return_path[0] == 0)? US"<>" : return_path);
4506 printf("Sender = %s\n", (sender_address[0] == 0)? US"<>" : sender_address);
4508 receive_add_recipient(
4509 string_sprintf("%s%s%s@%s",
4510 (ftest_prefix == NULL)? US"" : ftest_prefix,
4512 (ftest_suffix == NULL)? US"" : ftest_suffix,
4513 deliver_domain), -1);
4515 printf("Recipient = %s\n", recipients_list[0].address);
4516 if (ftest_prefix != NULL) printf("Prefix = %s\n", ftest_prefix);
4517 if (ftest_suffix != NULL) printf("Suffix = %s\n", ftest_suffix);
4519 chdir("/"); /* Get away from wherever the user is running this from */
4520 exim_exit(filter_runtest(filter_fd, ftest_system, more)?
4521 EXIT_SUCCESS : EXIT_FAILURE);
4524 /* Else act on the result of message reception. We should not get here unless
4525 message_id[0] is non-zero. If queue_only is set, local_queue_only will be
4526 TRUE. If it is not, check on the number of messages received in this
4527 connection. If that's OK and queue_only_load is set, check that the load
4528 average is below it. If it is not, set local_queue_only TRUE. Note that it
4529 then remains this way for any subsequent messages on the same SMTP connection.
4530 This is a deliberate choice; even though the load average may fall, it
4531 doesn't seem right to deliver later messages on the same call when not
4532 delivering earlier ones. */
4534 if (!local_queue_only)
4536 if (smtp_accept_queue_per_connection > 0 &&
4537 receive_messagecount > smtp_accept_queue_per_connection)
4539 local_queue_only = TRUE;
4540 queue_only_reason = 2;
4542 else if (queue_only_load >= 0)
4544 local_queue_only = (load_average = os_getloadavg()) > queue_only_load;
4545 if (local_queue_only) queue_only_reason = 3;
4549 /* If running as an MUA wrapper, all queueing options and freezing options
4553 local_queue_only = queue_only_policy = deliver_freeze = FALSE;
4555 /* Log the queueing here, when it will get a message id attached, but
4556 not if queue_only is set (case 0). Case 1 doesn't happen here (too many
4559 if (local_queue_only) switch(queue_only_reason)
4562 log_write(L_delay_delivery,
4563 LOG_MAIN, "no immediate delivery: more than %d messages "
4564 "received in one connection", smtp_accept_queue_per_connection);
4568 log_write(L_delay_delivery,
4569 LOG_MAIN, "no immediate delivery: load average %.2f",
4570 (double)load_average/1000.0);
4574 /* Else do the delivery unless the ACL or local_scan() called for queue only
4575 or froze the message. Always deliver in a separate process. A fork failure is
4576 not a disaster, as the delivery will eventually happen on a subsequent queue
4579 else if (!queue_only_policy && !deliver_freeze)
4582 if ((pid = fork()) == 0)
4585 close_unwanted(); /* Close unwanted file descriptors and TLS */
4586 exim_nullstd(); /* Ensure std{in,out,err} exist */
4588 /* Re-exec Exim if we need to regain privilege (note: in mua_wrapper
4589 mode, deliver_drop_privilege is forced TRUE). */
4591 if (geteuid() != root_uid && !deliver_drop_privilege && !unprivileged)
4593 (void)child_exec_exim(CEE_EXEC_EXIT, FALSE, NULL, FALSE, 2, US"-Mc",
4595 /* Control does not return here. */
4598 /* No need to re-exec */
4600 rc = deliver_message(message_id, FALSE, FALSE);
4602 _exit((!mua_wrapper || rc == DELIVER_MUA_SUCCEEDED)?
4603 EXIT_SUCCESS : EXIT_FAILURE);
4608 log_write(0, LOG_MAIN|LOG_PANIC, "failed to fork automatic delivery "
4609 "process: %s", strerror(errno));
4612 /* In the parent, wait if synchronous delivery is required. This will
4613 always be the case in MUA wrapper mode. */
4615 else if (synchronous_delivery)
4618 while (wait(&status) != pid);
4619 if ((status & 0x00ff) != 0)
4620 log_write(0, LOG_MAIN|LOG_PANIC,
4621 "process %d crashed with signal %d while delivering %s",
4622 (int)pid, status & 0x00ff, message_id);
4623 if (mua_wrapper && (status & 0xffff) != 0) exim_exit(EXIT_FAILURE);
4627 /* The loop will repeat if more is TRUE. If we do not know know that the OS
4628 automatically reaps children (see comments above the loop), clear away any
4629 finished subprocesses here, in case there are lots of messages coming in
4630 from the same source. */
4632 #ifndef SIG_IGN_WORKS
4633 while (waitpid(-1, NULL, WNOHANG) > 0);
4637 exim_exit(EXIT_SUCCESS); /* Never returns */
4638 return 0; /* To stop compiler warning */