1 /* $Cambridge: exim/src/src/exim.c,v 1.32 2006/02/10 16:29:20 ph10 Exp $ */
3 /*************************************************
4 * Exim - an Internet mail transport agent *
5 *************************************************/
7 /* Copyright (c) University of Cambridge 1995 - 2006 */
8 /* See the file NOTICE for conditions of use and distribution. */
11 /* The main function: entry point, initialization, and high-level control.
12 Also a few functions that don't naturally fit elsewhere. */
19 /*************************************************
20 * Function interface to store functions *
21 *************************************************/
23 /* We need some real functions to pass to the PCRE regular expression library
24 for store allocation via Exim's store manager. The normal calls are actually
25 macros that pass over location information to make tracing easier. These
26 functions just interface to the standard macro calls. A good compiler will
27 optimize out the tail recursion and so not make them too expensive. There
28 are two sets of functions; one for use when we want to retain the compiled
29 regular expression for a long time; the other for short-term use. */
32 function_store_get(size_t size)
34 return store_get((int)size);
38 function_dummy_free(void *block) { block = block; }
41 function_store_malloc(size_t size)
43 return store_malloc((int)size);
47 function_store_free(void *block)
55 /*************************************************
56 * Compile regular expression and panic on fail *
57 *************************************************/
59 /* This function is called when failure to compile a regular expression leads
60 to a panic exit. In other cases, pcre_compile() is called directly. In many
61 cases where this function is used, the results of the compilation are to be
62 placed in long-lived store, so we temporarily reset the store management
63 functions that PCRE uses if the use_malloc flag is set.
66 pattern the pattern to compile
67 caseless TRUE if caseless matching is required
68 use_malloc TRUE if compile into malloc store
70 Returns: pointer to the compiled pattern
74 regex_must_compile(uschar *pattern, BOOL caseless, BOOL use_malloc)
77 int options = PCRE_COPT;
82 pcre_malloc = function_store_malloc;
83 pcre_free = function_store_free;
85 if (caseless) options |= PCRE_CASELESS;
86 yield = pcre_compile(CS pattern, options, (const char **)&error, &offset, NULL);
87 pcre_malloc = function_store_get;
88 pcre_free = function_dummy_free;
90 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "regular expression error: "
91 "%s at offset %d while compiling %s", error, offset, pattern);
98 /*************************************************
99 * Execute regular expression and set strings *
100 *************************************************/
102 /* This function runs a regular expression match, and sets up the pointers to
103 the matched substrings.
106 re the compiled expression
107 subject the subject string
108 options additional PCRE options
109 setup if < 0 do full setup
110 if >= 0 setup from setup+1 onwards,
111 excluding the full matched string
113 Returns: TRUE or FALSE
117 regex_match_and_setup(const pcre *re, uschar *subject, int options, int setup)
119 int ovector[3*(EXPAND_MAXN+1)];
120 int n = pcre_exec(re, NULL, CS subject, Ustrlen(subject), 0,
121 PCRE_EOPT | options, ovector, sizeof(ovector)/sizeof(int));
123 if (n == 0) n = EXPAND_MAXN + 1;
127 expand_nmax = (setup < 0)? 0 : setup + 1;
128 for (nn = (setup < 0)? 0 : 2; nn < n*2; nn += 2)
130 expand_nstring[expand_nmax] = subject + ovector[nn];
131 expand_nlength[expand_nmax++] = ovector[nn+1] - ovector[nn];
141 /*************************************************
142 * Handler for SIGUSR1 *
143 *************************************************/
145 /* SIGUSR1 causes any exim process to write to the process log details of
146 what it is currently doing. It will only be used if the OS is capable of
147 setting up a handler that causes automatic restarting of any system call
148 that is in progress at the time.
150 Argument: the signal number (SIGUSR1)
155 usr1_handler(int sig)
157 sig = sig; /* Keep picky compilers happy */
158 log_write(0, LOG_PROCESS, "%s", process_info);
160 os_restarting_signal(SIGUSR1, usr1_handler);
165 /*************************************************
167 *************************************************/
169 /* This handler is enabled most of the time that Exim is running. The handler
170 doesn't actually get used unless alarm() has been called to set a timer, to
171 place a time limit on a system call of some kind. When the handler is run, it
174 There are some other SIGALRM handlers that are used in special cases when more
175 than just a flag setting is required; for example, when reading a message's
176 input. These are normally set up in the code module that uses them, and the
177 SIGALRM handler is reset to this one afterwards.
179 Argument: the signal value (SIGALRM)
184 sigalrm_handler(int sig)
186 sig = sig; /* Keep picky compilers happy */
188 os_non_restarting_signal(SIGALRM, sigalrm_handler);
193 /*************************************************
194 * Sleep for a fractional time interval *
195 *************************************************/
197 /* This function is called by millisleep() and exim_wait_tick() to wait for a
198 period of time that may include a fraction of a second. The coding is somewhat
199 tedious. We do not expect setitimer() ever to fail, but if it does, the process
200 will wait for ever, so we panic in this instance. (There was a case of this
201 when a bug in a function that calls milliwait() caused it to pass invalid data.
202 That's when I added the check. :-)
204 Argument: an itimerval structure containing the interval
209 milliwait(struct itimerval *itval)
212 sigset_t old_sigmask;
213 (void)sigemptyset(&sigmask); /* Empty mask */
214 (void)sigaddset(&sigmask, SIGALRM); /* Add SIGALRM */
215 (void)sigprocmask(SIG_BLOCK, &sigmask, &old_sigmask); /* Block SIGALRM */
216 if (setitimer(ITIMER_REAL, itval, NULL) < 0) /* Start timer */
217 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
218 "setitimer() failed: %s", strerror(errno));
219 (void)sigfillset(&sigmask); /* All signals */
220 (void)sigdelset(&sigmask, SIGALRM); /* Remove SIGALRM */
221 (void)sigsuspend(&sigmask); /* Until SIGALRM */
222 (void)sigprocmask(SIG_SETMASK, &old_sigmask, NULL); /* Restore mask */
228 /*************************************************
229 * Millisecond sleep function *
230 *************************************************/
232 /* The basic sleep() function has a granularity of 1 second, which is too rough
233 in some cases - for example, when using an increasing delay to slow down
236 Argument: number of millseconds
243 struct itimerval itval;
244 itval.it_interval.tv_sec = 0;
245 itval.it_interval.tv_usec = 0;
246 itval.it_value.tv_sec = msec/1000;
247 itval.it_value.tv_usec = (msec % 1000) * 1000;
253 /*************************************************
254 * Compare microsecond times *
255 *************************************************/
262 Returns: -1, 0, or +1
266 exim_tvcmp(struct timeval *t1, struct timeval *t2)
268 if (t1->tv_sec > t2->tv_sec) return +1;
269 if (t1->tv_sec < t2->tv_sec) return -1;
270 if (t1->tv_usec > t2->tv_usec) return +1;
271 if (t1->tv_usec < t2->tv_usec) return -1;
278 /*************************************************
279 * Clock tick wait function *
280 *************************************************/
282 /* Exim uses a time + a pid to generate a unique identifier in two places: its
283 message IDs, and in file names for maildir deliveries. Because some OS now
284 re-use pids within the same second, sub-second times are now being used.
285 However, for absolute certaintly, we must ensure the clock has ticked before
286 allowing the relevant process to complete. At the time of implementation of
287 this code (February 2003), the speed of processors is such that the clock will
288 invariably have ticked already by the time a process has done its job. This
289 function prepares for the time when things are faster - and it also copes with
290 clocks that go backwards.
293 then_tv A timeval which was used to create uniqueness; its usec field
294 has been rounded down to the value of the resolution.
295 We want to be sure the current time is greater than this.
296 resolution The resolution that was used to divide the microseconds
297 (1 for maildir, larger for message ids)
303 exim_wait_tick(struct timeval *then_tv, int resolution)
305 struct timeval now_tv;
306 long int now_true_usec;
308 (void)gettimeofday(&now_tv, NULL);
309 now_true_usec = now_tv.tv_usec;
310 now_tv.tv_usec = (now_true_usec/resolution) * resolution;
312 if (exim_tvcmp(&now_tv, then_tv) <= 0)
314 struct itimerval itval;
315 itval.it_interval.tv_sec = 0;
316 itval.it_interval.tv_usec = 0;
317 itval.it_value.tv_sec = then_tv->tv_sec - now_tv.tv_sec;
318 itval.it_value.tv_usec = then_tv->tv_usec + resolution - now_true_usec;
320 /* We know that, overall, "now" is less than or equal to "then". Therefore, a
321 negative value for the microseconds is possible only in the case when "now"
322 is more than a second less than "then". That means that itval.it_value.tv_sec
323 is greater than zero. The following correction is therefore safe. */
325 if (itval.it_value.tv_usec < 0)
327 itval.it_value.tv_usec += 1000000;
328 itval.it_value.tv_sec -= 1;
331 DEBUG(D_transport|D_receive)
333 if (!running_in_test_harness)
335 debug_printf("tick check: %lu.%06lu %lu.%06lu\n",
336 then_tv->tv_sec, then_tv->tv_usec, now_tv.tv_sec, now_tv.tv_usec);
337 debug_printf("waiting %lu.%06lu\n", itval.it_value.tv_sec,
338 itval.it_value.tv_usec);
349 /*************************************************
350 * Set up processing details *
351 *************************************************/
353 /* Save a text string for dumping when SIGUSR1 is received.
354 Do checks for overruns.
356 Arguments: format and arguments, as for printf()
361 set_process_info(char *format, ...)
365 sprintf(CS process_info, "%5d ", (int)getpid());
366 len = Ustrlen(process_info);
367 va_start(ap, format);
368 if (!string_vformat(process_info + len, PROCESS_INFO_SIZE - len, format, ap))
369 Ustrcpy(process_info + len, "**** string overflowed buffer ****");
370 DEBUG(D_process_info) debug_printf("set_process_info: %s\n", process_info);
378 /*************************************************
379 * Ensure stdin, stdout, and stderr exist *
380 *************************************************/
382 /* Some operating systems grumble if an exec() happens without a standard
383 input, output, and error (fds 0, 1, 2) being defined. The worry is that some
384 file will be opened and will use these fd values, and then some other bit of
385 code will assume, for example, that it can write error messages to stderr.
386 This function ensures that fds 0, 1, and 2 are open if they do not already
387 exist, by connecting them to /dev/null.
389 This function is also used to ensure that std{in,out,err} exist at all times,
390 so that if any library that Exim calls tries to use them, it doesn't crash.
402 for (i = 0; i <= 2; i++)
404 if (fstat(i, &statbuf) < 0 && errno == EBADF)
406 if (devnull < 0) devnull = open("/dev/null", O_RDWR);
407 if (devnull < 0) log_write(0, LOG_MAIN|LOG_PANIC_DIE, "%s",
408 string_open_failed(errno, "/dev/null"));
409 if (devnull != i) (void)dup2(devnull, i);
412 if (devnull > 2) (void)close(devnull);
418 /*************************************************
419 * Close unwanted file descriptors for delivery *
420 *************************************************/
422 /* This function is called from a new process that has been forked to deliver
423 an incoming message, either directly, or using exec.
425 We want any smtp input streams to be closed in this new process. However, it
426 has been observed that using fclose() here causes trouble. When reading in -bS
427 input, duplicate copies of messages have been seen. The files will be sharing a
428 file pointer with the parent process, and it seems that fclose() (at least on
429 some systems - I saw this on Solaris 2.5.1) messes with that file pointer, at
430 least sometimes. Hence we go for closing the underlying file descriptors.
432 If TLS is active, we want to shut down the TLS library, but without molesting
433 the parent's SSL connection.
435 For delivery of a non-SMTP message, we want to close stdin and stdout (and
436 stderr unless debugging) because the calling process might have set them up as
437 pipes and be waiting for them to close before it waits for the submission
438 process to terminate. If they aren't closed, they hold up the calling process
439 until the initial delivery process finishes, which is not what we want.
441 Exception: We do want it for synchronous delivery!
443 And notwithstanding all the above, if D_resolver is set, implying resolver
444 debugging, leave stdout open, because that's where the resolver writes its
447 When we close stderr (which implies we've also closed stdout), we also get rid
448 of any controlling terminal.
460 tls_close(FALSE); /* Shut down the TLS library */
462 (void)close(fileno(smtp_in));
463 (void)close(fileno(smtp_out));
468 (void)close(0); /* stdin */
469 if ((debug_selector & D_resolver) == 0) (void)close(1); /* stdout */
470 if (debug_selector == 0) /* stderr */
472 if (!synchronous_delivery)
485 /*************************************************
487 *************************************************/
489 /* This function sets a new uid and gid permanently, optionally calling
490 initgroups() to set auxiliary groups. There are some special cases when running
491 Exim in unprivileged modes. In these situations the effective uid will not be
492 root; if we already have the right effective uid/gid, and don't need to
493 initialize any groups, leave things as they are.
498 igflag TRUE if initgroups() wanted
499 msg text to use in debugging output and failure log
501 Returns: nothing; bombs out on failure
505 exim_setugid(uid_t uid, gid_t gid, BOOL igflag, uschar *msg)
507 uid_t euid = geteuid();
508 gid_t egid = getegid();
510 if (euid == root_uid || euid != uid || egid != gid || igflag)
512 /* At least one OS returns +1 for initgroups failure, so just check for
517 struct passwd *pw = getpwuid(uid);
520 if (initgroups(pw->pw_name, gid) != 0)
521 log_write(0,LOG_MAIN|LOG_PANIC_DIE,"initgroups failed for uid=%ld: %s",
522 (long int)uid, strerror(errno));
524 else log_write(0, LOG_MAIN|LOG_PANIC_DIE, "cannot run initgroups(): "
525 "no passwd entry for uid=%ld", (long int)uid);
528 if (setgid(gid) < 0 || setuid(uid) < 0)
530 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "unable to set gid=%ld or uid=%ld "
531 "(euid=%ld): %s", (long int)gid, (long int)uid, (long int)euid, msg);
535 /* Debugging output included uid/gid and all groups */
540 gid_t group_list[NGROUPS_MAX];
541 debug_printf("changed uid/gid: %s\n uid=%ld gid=%ld pid=%ld\n", msg,
542 (long int)geteuid(), (long int)getegid(), (long int)getpid());
543 group_count = getgroups(NGROUPS_MAX, group_list);
544 debug_printf(" auxiliary group list:");
548 for (i = 0; i < group_count; i++) debug_printf(" %d", (int)group_list[i]);
550 else debug_printf(" <none>");
558 /*************************************************
560 *************************************************/
562 /* Exim exits via this function so that it always clears up any open
568 Returns: does not return
576 debug_printf(">>>>>>>>>>>>>>>> Exim pid=%d terminating with rc=%d "
577 ">>>>>>>>>>>>>>>>\n", (int)getpid(), rc);
584 /*************************************************
585 * Extract port from host address *
586 *************************************************/
588 /* Called to extract the port from the values given to -oMa and -oMi.
589 It also checks the syntax of the address, and terminates it before the
590 port data when a port is extracted.
593 address the address, with possible port on the end
595 Returns: the port, or zero if there isn't one
596 bombs out on a syntax error
600 check_port(uschar *address)
602 int port = host_address_extract_port(address);
603 if (string_is_ip_address(address, NULL) == 0)
605 fprintf(stderr, "exim abandoned: \"%s\" is not an IP address\n", address);
613 /*************************************************
614 * Test/verify an address *
615 *************************************************/
617 /* This function is called by the -bv and -bt code. It extracts a working
618 address from a full RFC 822 address. This isn't really necessary per se, but it
619 has the effect of collapsing source routes.
623 flags flag bits for verify_address()
624 exit_value to be set for failures
630 test_address(uschar *s, int flags, int *exit_value)
632 int start, end, domain;
633 uschar *parse_error = NULL;
634 uschar *address = parse_extract_address(s, &parse_error, &start, &end, &domain,
638 fprintf(stdout, "syntax error: %s\n", parse_error);
643 int rc = verify_address(deliver_make_addr(address,TRUE), stdout, flags, -1,
644 -1, -1, NULL, NULL, NULL);
645 if (rc == FAIL) *exit_value = 2;
646 else if (rc == DEFER && *exit_value == 0) *exit_value = 1;
652 /*************************************************
653 * Decode bit settings for log/debug *
654 *************************************************/
656 /* This function decodes a string containing bit settings in the form of +name
657 and/or -name sequences, and sets/unsets bits in a bit string accordingly. It
658 also recognizes a numeric setting of the form =<number>, but this is not
659 intended for user use. It's an easy way for Exim to pass the debug settings
660 when it is re-exec'ed.
662 The log options are held in two unsigned ints (because there became too many
663 for one). The top bit in the table means "put in 2nd selector". This does not
664 yet apply to debug options, so the "=" facility sets only the first selector.
666 The "all" selector, which must be equal to 0xffffffff, is recognized specially.
667 It sets all the bits in both selectors. However, there is a facility for then
668 unsetting certain bits, because we want to turn off "memory" in the debug case.
670 A bad value for a debug setting is treated as an unknown option - error message
671 to stderr and die. For log settings, which come from the configuration file,
672 we write to the log on the way out...
675 selector1 address of the first bit string
676 selector2 address of the second bit string, or NULL
677 notall1 bits to exclude from "all" for selector1
678 notall2 bits to exclude from "all" for selector2
679 string the configured string
680 options the table of option names
682 which "log" or "debug"
684 Returns: nothing on success - bomb out on failure
688 decode_bits(unsigned int *selector1, unsigned int *selector2, int notall1,
689 int notall2, uschar *string, bit_table *options, int count, uschar *which)
692 if (string == NULL) return;
696 char *end; /* Not uschar */
697 *selector1 = strtoul(CS string+1, &end, 0);
698 if (*end == 0) return;
699 errmsg = string_sprintf("malformed numeric %s_selector setting: %s", which,
704 /* Handle symbolic setting */
711 bit_table *start, *end;
713 while (isspace(*string)) string++;
714 if (*string == 0) return;
716 if (*string != '+' && *string != '-')
718 errmsg = string_sprintf("malformed %s_selector setting: "
719 "+ or - expected but found \"%s\"", which, string);
723 adding = *string++ == '+';
725 while (isalnum(*string) || *string == '_') string++;
729 end = options + count;
733 bit_table *middle = start + (end - start)/2;
734 int c = Ustrncmp(s, middle->name, len);
737 if (middle->name[len] != 0) c = -1; else
739 unsigned int bit = middle->bit;
740 unsigned int *selector;
742 /* The value with all bits set means "force all bits in both selectors"
743 in the case where two are being handled. However, the top bit in the
744 second selector is never set. When setting, some bits can be excluded.
747 if (bit == 0xffffffff)
751 *selector1 = 0xffffffff ^ notall1;
752 if (selector2 != NULL) *selector2 = 0x7fffffff ^ notall2;
757 if (selector2 != NULL) *selector2 = 0;
761 /* Otherwise, the 0x80000000 bit means "this value, without the top
762 bit, belongs in the second selector". */
766 if ((bit & 0x80000000) != 0)
768 selector = selector2;
771 else selector = selector1;
772 if (adding) *selector |= bit; else *selector &= ~bit;
774 break; /* Out of loop to match selector name */
777 if (c < 0) end = middle; else start = middle + 1;
778 } /* Loop to match selector name */
782 errmsg = string_sprintf("unknown %s_selector setting: %c%.*s", which,
783 adding? '+' : '-', len, s);
786 } /* Loop for selector names */
788 /* Handle disasters */
791 if (Ustrcmp(which, "debug") == 0)
793 fprintf(stderr, "exim: %s\n", errmsg);
796 else log_write(0, LOG_CONFIG|LOG_PANIC_DIE, "%s", errmsg);
801 /*************************************************
802 * Show supported features *
803 *************************************************/
805 /* This function is called for -bV and for -d to output the optional features
806 of the current Exim binary.
808 Arguments: a FILE for printing
813 show_whats_supported(FILE *f)
815 #ifdef DB_VERSION_STRING
816 fprintf(f, "Berkeley DB: %s\n", DB_VERSION_STRING);
817 #elif defined(BTREEVERSION) && defined(HASHVERSION)
819 fprintf(f, "Probably Berkeley DB version 1.8x (native mode)\n");
821 fprintf(f, "Probably Berkeley DB version 1.8x (compatibility mode)\n");
823 #elif defined(_DBM_RDONLY) || defined(dbm_dirfno)
824 fprintf(f, "Probably ndbm\n");
825 #elif defined(USE_TDB)
826 fprintf(f, "Using tdb\n");
829 fprintf(f, "Probably GDBM (native mode)\n");
831 fprintf(f, "Probably GDBM (compatibility mode)\n");
835 fprintf(f, "Support for:");
836 #ifdef SUPPORT_CRYPTEQ
837 fprintf(f, " crypteq");
840 fprintf(f, " iconv()");
852 fprintf(f, " Expand_dlfunc");
854 #ifdef USE_TCP_WRAPPERS
855 fprintf(f, " TCPwrappers");
859 fprintf(f, " GnuTLS");
861 fprintf(f, " OpenSSL");
864 #ifdef SUPPORT_TRANSLATE_IP_ADDRESS
865 fprintf(f, " translate_ip_address");
867 #ifdef SUPPORT_MOVE_FROZEN_MESSAGES
868 fprintf(f, " move_frozen_messages");
870 #ifdef WITH_CONTENT_SCAN
871 fprintf(f, " Content_Scanning");
873 #ifdef WITH_OLD_DEMIME
874 fprintf(f, " Old_Demime");
876 #ifdef EXPERIMENTAL_SPF
877 fprintf(f, " Experimental_SPF");
879 #ifdef EXPERIMENTAL_SRS
880 fprintf(f, " Experimental_SRS");
882 #ifdef EXPERIMENTAL_BRIGHTMAIL
883 fprintf(f, " Experimental_Brightmail");
885 #ifdef EXPERIMENTAL_DOMAINKEYS
886 fprintf(f, " Experimental_DomainKeys");
890 fprintf(f, "Lookups:");
891 #ifdef LOOKUP_LSEARCH
892 fprintf(f, " lsearch wildlsearch nwildlsearch iplsearch");
898 fprintf(f, " dbm dbmnz");
901 fprintf(f, " dnsdb");
903 #ifdef LOOKUP_DSEARCH
904 fprintf(f, " dsearch");
907 fprintf(f, " ibase");
910 fprintf(f, " ldap ldapdn ldapm");
913 fprintf(f, " mysql");
916 fprintf(f, " nis nis0");
918 #ifdef LOOKUP_NISPLUS
919 fprintf(f, " nisplus");
922 fprintf(f, " oracle");
925 fprintf(f, " passwd");
928 fprintf(f, " pgsql");
931 fprintf(f, " sqlite");
934 fprintf(f, " testdb");
937 fprintf(f, " whoson");
941 fprintf(f, "Authenticators:");
943 fprintf(f, " cram_md5");
945 #ifdef AUTH_CYRUS_SASL
946 fprintf(f, " cyrus_sasl");
948 #ifdef AUTH_PLAINTEXT
949 fprintf(f, " plaintext");
956 fprintf(f, "Routers:");
958 fprintf(f, " accept");
960 #ifdef ROUTER_DNSLOOKUP
961 fprintf(f, " dnslookup");
963 #ifdef ROUTER_IPLITERAL
964 fprintf(f, " ipliteral");
966 #ifdef ROUTER_IPLOOKUP
967 fprintf(f, " iplookup");
969 #ifdef ROUTER_MANUALROUTE
970 fprintf(f, " manualroute");
972 #ifdef ROUTER_QUERYPROGRAM
973 fprintf(f, " queryprogram");
975 #ifdef ROUTER_REDIRECT
976 fprintf(f, " redirect");
980 fprintf(f, "Transports:");
981 #ifdef TRANSPORT_APPENDFILE
982 fprintf(f, " appendfile");
983 #ifdef SUPPORT_MAILDIR
984 fprintf(f, "/maildir");
986 #ifdef SUPPORT_MAILSTORE
987 fprintf(f, "/mailstore");
993 #ifdef TRANSPORT_AUTOREPLY
994 fprintf(f, " autoreply");
996 #ifdef TRANSPORT_LMTP
999 #ifdef TRANSPORT_PIPE
1000 fprintf(f, " pipe");
1002 #ifdef TRANSPORT_SMTP
1003 fprintf(f, " smtp");
1007 if (fixed_never_users[0] > 0)
1010 fprintf(f, "Fixed never_users: ");
1011 for (i = 1; i <= (int)fixed_never_users[0] - 1; i++)
1012 fprintf(f, "%d:", (unsigned int)fixed_never_users[i]);
1013 fprintf(f, "%d\n", (unsigned int)fixed_never_users[i]);
1016 fprintf(f, "Size of off_t: %d\n", sizeof(off_t));
1022 /*************************************************
1023 * Quote a local part *
1024 *************************************************/
1026 /* This function is used when a sender address or a From: or Sender: header
1027 line is being created from the caller's login, or from an authenticated_id. It
1028 applies appropriate quoting rules for a local part.
1030 Argument: the local part
1031 Returns: the local part, quoted if necessary
1035 local_part_quote(uschar *lpart)
1037 BOOL needs_quote = FALSE;
1042 for (t = lpart; !needs_quote && *t != 0; t++)
1044 needs_quote = !isalnum(*t) && strchr("!#$%&'*+-/=?^_`{|}~", *t) == NULL &&
1045 (*t != '.' || t == lpart || t[1] == 0);
1048 if (!needs_quote) return lpart;
1051 yield = string_cat(NULL, &size, &ptr, US"\"", 1);
1055 uschar *nq = US Ustrpbrk(lpart, "\\\"");
1058 yield = string_cat(yield, &size, &ptr, lpart, Ustrlen(lpart));
1061 yield = string_cat(yield, &size, &ptr, lpart, nq - lpart);
1062 yield = string_cat(yield, &size, &ptr, US"\\", 1);
1063 yield = string_cat(yield, &size, &ptr, nq, 1);
1067 yield = string_cat(yield, &size, &ptr, US"\"", 1);
1075 /*************************************************
1076 * Load readline() functions *
1077 *************************************************/
1079 /* This function is called from testing executions that read data from stdin,
1080 but only when running as the calling user. Currently, only -be does this. The
1081 function loads the readline() function library and passes back the functions.
1082 On some systems, it needs the curses library, so load that too, but try without
1083 it if loading fails. All this functionality has to be requested at build time.
1086 fn_readline_ptr pointer to where to put the readline pointer
1087 fn_addhist_ptr pointer to where to put the addhistory function
1089 Returns: the dlopen handle or NULL on failure
1093 set_readline(char * (**fn_readline_ptr)(char *),
1094 char * (**fn_addhist_ptr)(char *))
1097 void *dlhandle_curses = dlopen("libcurses.so", RTLD_GLOBAL|RTLD_LAZY);
1099 dlhandle = dlopen("libreadline.so", RTLD_GLOBAL|RTLD_NOW);
1100 if (dlhandle_curses != NULL) dlclose(dlhandle_curses);
1102 if (dlhandle != NULL)
1104 *fn_readline_ptr = (char *(*)(char*))dlsym(dlhandle, "readline");
1105 *fn_addhist_ptr = (char *(*)(char*))dlsym(dlhandle, "add_history");
1109 DEBUG(D_any) debug_printf("failed to load readline: %s\n", dlerror());
1118 /*************************************************
1119 * Get a line from stdin for testing things *
1120 *************************************************/
1122 /* This function is called when running tests that can take a number of lines
1123 of input (for example, -be and -bt). It handles continuations and trailing
1124 spaces. And prompting and a blank line output on eof. If readline() is in use,
1125 the arguments are non-NULL and provide the relevant functions.
1128 fn_readline readline function or NULL
1129 fn_addhist addhist function or NULL
1131 Returns: pointer to dynamic memory, or NULL at end of file
1135 get_stdinput(char *(*fn_readline)(char *), char *(*fn_addhist)(char *))
1140 uschar *yield = NULL;
1142 if (fn_readline == NULL) printf("> ");
1146 uschar buffer[1024];
1150 char *readline_line = NULL;
1151 if (fn_readline != NULL)
1153 if ((readline_line = fn_readline((i > 0)? "":"> ")) == NULL) break;
1154 if (*readline_line != 0 && fn_addhist != NULL) fn_addhist(readline_line);
1155 p = US readline_line;
1160 /* readline() not in use */
1163 if (Ufgets(buffer, sizeof(buffer), stdin) == NULL) break;
1167 /* Handle the line */
1169 ss = p + (int)Ustrlen(p);
1170 while (ss > p && isspace(ss[-1])) ss--;
1174 while (p < ss && isspace(*p)) p++; /* leading space after cont */
1177 yield = string_cat(yield, &size, &ptr, p, ss - p);
1180 if (fn_readline != NULL) free(readline_line);
1183 if (ss == p || yield[ptr-1] != '\\')
1191 if (yield == NULL) printf("\n");
1197 /*************************************************
1198 * Entry point and high-level code *
1199 *************************************************/
1201 /* Entry point for the Exim mailer. Analyse the arguments and arrange to take
1202 the appropriate action. All the necessary functions are present in the one
1203 binary. I originally thought one should split it up, but it turns out that so
1204 much of the apparatus is needed in each chunk that one might as well just have
1205 it all available all the time, which then makes the coding easier as well.
1208 argc count of entries in argv
1209 argv argument strings, with argv[0] being the program name
1211 Returns: EXIT_SUCCESS if terminated successfully
1212 EXIT_FAILURE otherwise, except when a message has been sent
1213 to the sender, and -oee was given
1217 main(int argc, char **cargv)
1219 uschar **argv = USS cargv;
1220 int arg_receive_timeout = -1;
1221 int arg_smtp_receive_timeout = -1;
1222 int arg_error_handling = error_handling;
1223 int filter_sfd = -1;
1224 int filter_ufd = -1;
1227 int list_queue_option = 0;
1229 int msg_action_arg = -1;
1230 int namelen = (argv[0] == NULL)? 0 : Ustrlen(argv[0]);
1231 int queue_only_reason = 0;
1233 int perl_start_option = 0;
1235 int recipients_arg = argc;
1236 int sender_address_domain = 0;
1237 int test_retry_arg = -1;
1238 int test_rewrite_arg = -1;
1239 BOOL arg_queue_only = FALSE;
1240 BOOL bi_option = FALSE;
1241 BOOL checking = FALSE;
1242 BOOL count_queue = FALSE;
1243 BOOL expansion_test = FALSE;
1244 BOOL extract_recipients = FALSE;
1245 BOOL forced_delivery = FALSE;
1246 BOOL f_end_dot = FALSE;
1247 BOOL deliver_give_up = FALSE;
1248 BOOL list_queue = FALSE;
1249 BOOL list_options = FALSE;
1250 BOOL local_queue_only;
1252 BOOL one_msg_action = FALSE;
1253 BOOL queue_only_set = FALSE;
1254 BOOL receiving_message = TRUE;
1256 BOOL removed_privilege = FALSE;
1257 BOOL verify_address_mode = FALSE;
1258 BOOL verify_as_sender = FALSE;
1259 BOOL version_printed = FALSE;
1260 uschar *alias_arg = NULL;
1261 uschar *called_as = US"";
1262 uschar *start_queue_run_id = NULL;
1263 uschar *stop_queue_run_id = NULL;
1264 uschar *ftest_domain = NULL;
1265 uschar *ftest_localpart = NULL;
1266 uschar *ftest_prefix = NULL;
1267 uschar *ftest_suffix = NULL;
1268 uschar *real_sender_address;
1269 uschar *originator_home = US"/";
1273 struct stat statbuf;
1274 pid_t passed_qr_pid = (pid_t)0;
1275 int passed_qr_pipe = -1;
1276 gid_t group_list[NGROUPS_MAX];
1278 /* Possible options for -R and -S */
1280 static uschar *rsopts[] = { US"f", US"ff", US"r", US"rf", US"rff" };
1282 /* Need to define this in case we need to change the environment in order
1283 to get rid of a bogus time zone. We have to make it char rather than uschar
1284 because some OS define it in /usr/include/unistd.h. */
1286 extern char **environ;
1288 /* If the Exim user and/or group and/or the configuration file owner/group were
1289 defined by ref:name at build time, we must now find the actual uid/gid values.
1290 This is a feature to make the lives of binary distributors easier. */
1292 #ifdef EXIM_USERNAME
1293 if (route_finduser(US EXIM_USERNAME, &pw, &exim_uid))
1295 exim_gid = pw->pw_gid;
1299 fprintf(stderr, "exim: failed to find uid for user name \"%s\"\n",
1305 #ifdef EXIM_GROUPNAME
1306 if (!route_findgroup(US EXIM_GROUPNAME, &exim_gid))
1308 fprintf(stderr, "exim: failed to find gid for group name \"%s\"\n",
1314 #ifdef CONFIGURE_OWNERNAME
1315 if (!route_finduser(US CONFIGURE_OWNERNAME, NULL, &config_uid))
1317 fprintf(stderr, "exim: failed to find uid for user name \"%s\"\n",
1318 CONFIGURE_OWNERNAME);
1323 #ifdef CONFIGURE_GROUPNAME
1324 if (!route_findgroup(US CONFIGURE_GROUPNAME, &config_gid))
1326 fprintf(stderr, "exim: failed to find gid for group name \"%s\"\n",
1327 CONFIGURE_GROUPNAME);
1332 /* In the Cygwin environment, some initialization needs doing. It is fudged
1333 in by means of this macro. */
1339 /* Check a field which is patched when we are running Exim within its
1340 testing harness; do a fast initial check, and then the whole thing. */
1342 running_in_test_harness =
1343 *running_status == '<' && Ustrcmp(running_status, "<<<testing>>>") == 0;
1345 /* The C standard says that the equivalent of setlocale(LC_ALL, "C") is obeyed
1346 at the start of a program; however, it seems that some environments do not
1347 follow this. A "strange" locale can affect the formatting of timestamps, so we
1350 setlocale(LC_ALL, "C");
1352 /* Set up the default handler for timing using alarm(). */
1354 os_non_restarting_signal(SIGALRM, sigalrm_handler);
1356 /* Ensure we have a buffer for constructing log entries. Use malloc directly,
1357 because store_malloc writes a log entry on failure. */
1359 log_buffer = (uschar *)malloc(LOG_BUFFER_SIZE);
1360 if (log_buffer == NULL)
1362 fprintf(stderr, "exim: failed to get store for log buffer\n");
1366 /* Set log_stderr to stderr, provided that stderr exists. This gets reset to
1367 NULL when the daemon is run and the file is closed. We have to use this
1368 indirection, because some systems don't allow writing to the variable "stderr".
1371 if (fstat(fileno(stderr), &statbuf) >= 0) log_stderr = stderr;
1373 /* Arrange for the PCRE regex library to use our store functions. Note that
1374 the normal calls are actually macros that add additional arguments for
1375 debugging purposes so we have to assign specially constructed functions here.
1376 The default is to use store in the stacking pool, but this is overridden in the
1377 regex_must_compile() function. */
1379 pcre_malloc = function_store_get;
1380 pcre_free = function_dummy_free;
1382 /* Ensure there is a big buffer for temporary use in several places. It is put
1383 in malloc store so that it can be freed for enlargement if necessary. */
1385 big_buffer = store_malloc(big_buffer_size);
1387 /* Set up the handler for the data request signal, and set the initial
1388 descriptive text. */
1390 set_process_info("initializing");
1391 os_restarting_signal(SIGUSR1, usr1_handler);
1393 /* SIGHUP is used to get the daemon to reconfigure. It gets set as appropriate
1394 in the daemon code. For the rest of Exim's uses, we ignore it. */
1396 signal(SIGHUP, SIG_IGN);
1398 /* We don't want to die on pipe errors as the code is written to handle
1399 the write error instead. */
1401 signal(SIGPIPE, SIG_IGN);
1403 /* Under some circumstance on some OS, Exim can get called with SIGCHLD
1404 set to SIG_IGN. This causes subprocesses that complete before the parent
1405 process waits for them not to hang around, so when Exim calls wait(), nothing
1406 is there. The wait() code has been made robust against this, but let's ensure
1407 that SIGCHLD is set to SIG_DFL, because it's tidier to wait and get a process
1408 ending status. We use sigaction rather than plain signal() on those OS where
1409 SA_NOCLDWAIT exists, because we want to be sure it is turned off. (There was a
1410 problem on AIX with this.) */
1414 struct sigaction act;
1415 act.sa_handler = SIG_DFL;
1416 sigemptyset(&(act.sa_mask));
1418 sigaction(SIGCHLD, &act, NULL);
1421 signal(SIGCHLD, SIG_DFL);
1424 /* Save the arguments for use if we re-exec exim as a daemon after receiving
1429 /* Set up the version number. Set up the leading 'E' for the external form of
1430 message ids, set the pointer to the internal form, and initialize it to
1431 indicate no message being processed. */
1434 message_id_option[0] = '-';
1435 message_id_external = message_id_option + 1;
1436 message_id_external[0] = 'E';
1437 message_id = message_id_external + 1;
1440 /* Set the umask to zero so that any files that Exim creates are created
1441 with the modes that it specifies. */
1445 /* Precompile the regular expression for matching a message id. Keep this in
1446 step with the code that generates ids in the accept.c module. We need to do
1447 this here, because the -M options check their arguments for syntactic validity
1448 using mac_ismsgid, which uses this. */
1451 regex_must_compile(US"^(?:[^\\W_]{6}-){2}[^\\W_]{2}$", FALSE, TRUE);
1453 /* If the program is called as "mailq" treat it as equivalent to "exim -bp";
1454 this seems to be a generally accepted convention, since one finds symbolic
1455 links called "mailq" in standard OS configurations. */
1457 if ((namelen == 5 && Ustrcmp(argv[0], "mailq") == 0) ||
1458 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/mailq", 6) == 0))
1461 receiving_message = FALSE;
1462 called_as = US"-mailq";
1465 /* If the program is called as "rmail" treat it as equivalent to
1466 "exim -i -oee", thus allowing UUCP messages to be input using non-SMTP mode,
1467 i.e. preventing a single dot on a line from terminating the message, and
1468 returning with zero return code, even in cases of error (provided an error
1469 message has been sent). */
1471 if ((namelen == 5 && Ustrcmp(argv[0], "rmail") == 0) ||
1472 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/rmail", 6) == 0))
1475 called_as = US"-rmail";
1476 errors_sender_rc = EXIT_SUCCESS;
1479 /* If the program is called as "rsmtp" treat it as equivalent to "exim -bS";
1480 this is a smail convention. */
1482 if ((namelen == 5 && Ustrcmp(argv[0], "rsmtp") == 0) ||
1483 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/rsmtp", 6) == 0))
1485 smtp_input = smtp_batched_input = TRUE;
1486 called_as = US"-rsmtp";
1489 /* If the program is called as "runq" treat it as equivalent to "exim -q";
1490 this is a smail convention. */
1492 if ((namelen == 4 && Ustrcmp(argv[0], "runq") == 0) ||
1493 (namelen > 4 && Ustrncmp(argv[0] + namelen - 5, "/runq", 5) == 0))
1496 receiving_message = FALSE;
1497 called_as = US"-runq";
1500 /* If the program is called as "newaliases" treat it as equivalent to
1501 "exim -bi"; this is a sendmail convention. */
1503 if ((namelen == 10 && Ustrcmp(argv[0], "newaliases") == 0) ||
1504 (namelen > 10 && Ustrncmp(argv[0] + namelen - 11, "/newaliases", 11) == 0))
1507 receiving_message = FALSE;
1508 called_as = US"-newaliases";
1511 /* Save the original effective uid for a couple of uses later. It should
1512 normally be root, but in some esoteric environments it may not be. */
1514 original_euid = geteuid();
1516 /* Get the real uid and gid. If the caller is root, force the effective uid/gid
1517 to be the same as the real ones. This makes a difference only if Exim is setuid
1518 (or setgid) to something other than root, which could be the case in some
1519 special configurations. */
1521 real_uid = getuid();
1522 real_gid = getgid();
1524 if (real_uid == root_uid)
1530 /* If neither the original real uid nor the original euid was root, Exim is
1531 running in an unprivileged state. */
1533 unprivileged = (real_uid != root_uid && original_euid != root_uid);
1535 /* If the first argument is --help, pretend there are no arguments. This will
1536 cause a brief message to be given. */
1538 if (argc > 1 && Ustrcmp(argv[1], "--help") == 0) argc = 1;
1540 /* Scan the program's arguments. Some can be dealt with right away; others are
1541 simply recorded for checking and handling afterwards. Do a high-level switch
1542 on the second character (the one after '-'), to save some effort. */
1544 for (i = 1; i < argc; i++)
1546 BOOL badarg = FALSE;
1547 uschar *arg = argv[i];
1551 /* An argument not starting with '-' is the start of a recipients list;
1552 break out of the options-scanning loop. */
1560 /* An option consistion of -- terminates the options */
1562 if (Ustrcmp(arg, "--") == 0)
1564 recipients_arg = i + 1;
1568 /* Handle flagged options */
1570 switchchar = arg[1];
1573 /* Make all -ex options synonymous with -oex arguments, since that
1574 is assumed by various callers. Also make -qR options synonymous with -R
1575 options, as that seems to be required as well. Allow for -qqR too, and
1576 the same for -S options. */
1578 if (Ustrncmp(arg+1, "oe", 2) == 0 ||
1579 Ustrncmp(arg+1, "qR", 2) == 0 ||
1580 Ustrncmp(arg+1, "qS", 2) == 0)
1582 switchchar = arg[2];
1585 else if (Ustrncmp(arg+1, "qqR", 3) == 0 || Ustrncmp(arg+1, "qqS", 3) == 0)
1587 switchchar = arg[3];
1589 queue_2stage = TRUE;
1592 /* Make -r synonymous with -f, since it is a documented alias */
1594 else if (arg[1] == 'r') switchchar = 'f';
1596 /* Make -ov synonymous with -v */
1598 else if (Ustrcmp(arg, "-ov") == 0)
1604 /* High-level switch on active initial letter */
1608 /* -Btype is a sendmail option for 7bit/8bit setting. Exim is 8-bit clean
1609 so has no need of it. */
1612 if (*argrest == 0) i++; /* Skip over the type */
1617 receiving_message = FALSE; /* Reset TRUE for -bm, -bS, -bs below */
1619 /* -bd: Run in daemon mode, awaiting SMTP connections.
1620 -bdf: Ditto, but in the foreground.
1623 if (*argrest == 'd')
1625 daemon_listen = TRUE;
1626 if (*(++argrest) == 'f') background_daemon = FALSE;
1627 else if (*argrest != 0) { badarg = TRUE; break; }
1630 /* -be: Run in expansion test mode */
1632 else if (*argrest == 'e')
1633 expansion_test = checking = TRUE;
1635 /* -bF: Run system filter test */
1637 else if (*argrest == 'F')
1639 filter_test |= FTEST_SYSTEM;
1640 if (*(++argrest) != 0) { badarg = TRUE; break; }
1641 if (++i < argc) filter_test_sfile = argv[i]; else
1643 fprintf(stderr, "exim: file name expected after %s\n", argv[i-1]);
1648 /* -bf: Run user filter test
1649 -bfd: Set domain for filter testing
1650 -bfl: Set local part for filter testing
1651 -bfp: Set prefix for filter testing
1652 -bfs: Set suffix for filter testing
1655 else if (*argrest == 'f')
1657 if (*(++argrest) == 0)
1659 filter_test |= FTEST_USER;
1660 if (++i < argc) filter_test_ufile = argv[i]; else
1662 fprintf(stderr, "exim: file name expected after %s\n", argv[i-1]);
1670 fprintf(stderr, "exim: string expected after %s\n", arg);
1673 if (Ustrcmp(argrest, "d") == 0) ftest_domain = argv[i];
1674 else if (Ustrcmp(argrest, "l") == 0) ftest_localpart = argv[i];
1675 else if (Ustrcmp(argrest, "p") == 0) ftest_prefix = argv[i];
1676 else if (Ustrcmp(argrest, "s") == 0) ftest_suffix = argv[i];
1677 else { badarg = TRUE; break; }
1681 /* -bh: Host checking - an IP address must follow. */
1683 else if (Ustrcmp(argrest, "h") == 0 || Ustrcmp(argrest, "hc") == 0)
1685 if (++i >= argc) { badarg = TRUE; break; }
1686 sender_host_address = argv[i];
1687 host_checking = checking = log_testing_mode = TRUE;
1688 host_checking_callout = argrest[1] == 'c';
1691 /* -bi: This option is used by sendmail to initialize *the* alias file,
1692 though it has the -oA option to specify a different file. Exim has no
1693 concept of *the* alias file, but since Sun's YP make script calls
1694 sendmail this way, some support must be provided. */
1696 else if (Ustrcmp(argrest, "i") == 0) bi_option = TRUE;
1698 /* -bm: Accept and deliver message - the default option. Reinstate
1699 receiving_message, which got turned off for all -b options. */
1701 else if (Ustrcmp(argrest, "m") == 0) receiving_message = TRUE;
1703 /* -bnq: For locally originating messages, do not qualify unqualified
1704 addresses. In the envelope, this causes errors; in header lines they
1707 else if (Ustrcmp(argrest, "nq") == 0)
1709 allow_unqualified_sender = FALSE;
1710 allow_unqualified_recipient = FALSE;
1713 /* -bpxx: List the contents of the mail queue, in various forms. If
1714 the option is -bpc, just a queue count is needed. Otherwise, if the
1715 first letter after p is r, then order is random. */
1717 else if (*argrest == 'p')
1719 if (*(++argrest) == 'c')
1722 if (*(++argrest) != 0) badarg = TRUE;
1726 if (*argrest == 'r')
1728 list_queue_option = 8;
1731 else list_queue_option = 0;
1735 /* -bp: List the contents of the mail queue, top-level only */
1737 if (*argrest == 0) {}
1739 /* -bpu: List the contents of the mail queue, top-level undelivered */
1741 else if (Ustrcmp(argrest, "u") == 0) list_queue_option += 1;
1743 /* -bpa: List the contents of the mail queue, including all delivered */
1745 else if (Ustrcmp(argrest, "a") == 0) list_queue_option += 2;
1747 /* Unknown after -bp[r] */
1757 /* -bP: List the configuration variables given as the address list.
1758 Force -v, so configuration errors get displayed. */
1760 else if (Ustrcmp(argrest, "P") == 0)
1762 list_options = TRUE;
1763 debug_selector |= D_v;
1764 debug_file = stderr;
1767 /* -brt: Test retry configuration lookup */
1769 else if (Ustrcmp(argrest, "rt") == 0)
1771 test_retry_arg = i + 1;
1775 /* -brw: Test rewrite configuration */
1777 else if (Ustrcmp(argrest, "rw") == 0)
1779 test_rewrite_arg = i + 1;
1783 /* -bS: Read SMTP commands on standard input, but produce no replies -
1784 all errors are reported by sending messages. */
1786 else if (Ustrcmp(argrest, "S") == 0)
1787 smtp_input = smtp_batched_input = receiving_message = TRUE;
1789 /* -bs: Read SMTP commands on standard input and produce SMTP replies
1790 on standard output. */
1792 else if (Ustrcmp(argrest, "s") == 0) smtp_input = receiving_message = TRUE;
1794 /* -bt: address testing mode */
1796 else if (Ustrcmp(argrest, "t") == 0)
1797 address_test_mode = checking = log_testing_mode = TRUE;
1799 /* -bv: verify addresses */
1801 else if (Ustrcmp(argrest, "v") == 0)
1802 verify_address_mode = checking = log_testing_mode = TRUE;
1804 /* -bvs: verify sender addresses */
1806 else if (Ustrcmp(argrest, "vs") == 0)
1808 verify_address_mode = checking = log_testing_mode = TRUE;
1809 verify_as_sender = TRUE;
1812 /* -bV: Print version string and support details */
1814 else if (Ustrcmp(argrest, "V") == 0)
1816 printf("Exim version %s #%s built %s\n", version_string,
1817 version_cnumber, version_date);
1818 printf("%s\n", CS version_copyright);
1819 version_printed = TRUE;
1820 show_whats_supported(stdout);
1827 /* -C: change configuration file list; ignore if it isn't really
1828 a change! Enforce a prefix check if required. */
1833 if(++i < argc) argrest = argv[i]; else
1834 { badarg = TRUE; break; }
1836 if (Ustrcmp(config_main_filelist, argrest) != 0)
1838 #ifdef ALT_CONFIG_PREFIX
1840 int len = Ustrlen(ALT_CONFIG_PREFIX);
1841 uschar *list = argrest;
1843 while((filename = string_nextinlist(&list, &sep, big_buffer,
1844 big_buffer_size)) != NULL)
1846 if ((Ustrlen(filename) < len ||
1847 Ustrncmp(filename, ALT_CONFIG_PREFIX, len) != 0 ||
1848 Ustrstr(filename, "/../") != NULL) &&
1849 (Ustrcmp(filename, "/dev/null") != 0 || real_uid != root_uid))
1851 fprintf(stderr, "-C Permission denied\n");
1857 config_main_filelist = argrest;
1858 config_changed = TRUE;
1863 /* -D: set up a macro definition */
1866 #ifdef DISABLE_D_OPTION
1867 fprintf(stderr, "exim: -D is not available in this Exim binary\n");
1872 macro_item *mlast = NULL;
1875 uschar *s = argrest;
1877 while (isspace(*s)) s++;
1879 if (*s < 'A' || *s > 'Z')
1881 fprintf(stderr, "exim: macro name set by -D must start with "
1882 "an upper case letter\n");
1886 while (isalnum(*s) || *s == '_')
1888 if (ptr < sizeof(name)-1) name[ptr++] = *s;
1892 if (ptr == 0) { badarg = TRUE; break; }
1893 while (isspace(*s)) s++;
1896 if (*s++ != '=') { badarg = TRUE; break; }
1897 while (isspace(*s)) s++;
1900 for (m = macros; m != NULL; m = m->next)
1902 if (Ustrcmp(m->name, name) == 0)
1904 fprintf(stderr, "exim: duplicated -D in command line\n");
1910 m = store_get(sizeof(macro_item) + Ustrlen(name));
1912 m->command_line = TRUE;
1913 if (mlast == NULL) macros = m; else mlast->next = m;
1914 Ustrcpy(m->name, name);
1915 m->replacement = string_copy(s);
1917 if (clmacro_count >= MAX_CLMACROS)
1919 fprintf(stderr, "exim: too many -D options on command line\n");
1922 clmacros[clmacro_count++] = string_sprintf("-D%s=%s", m->name,
1928 /* -d: Set debug level (see also -v below) or set the drop_cr option.
1929 The latter is now a no-op, retained for compatibility only. If -dd is used,
1930 debugging subprocesses of the daemon is disabled. */
1933 if (Ustrcmp(argrest, "ropcr") == 0)
1935 /* drop_cr = TRUE; */
1938 /* Use an intermediate variable so that we don't set debugging while
1939 decoding the debugging bits. */
1943 unsigned int selector = D_default;
1946 if (*argrest == 'd')
1948 debug_daemon = TRUE;
1952 decode_bits(&selector, NULL, D_memory, 0, argrest, debug_options,
1953 debug_options_count, US"debug");
1954 debug_selector = selector;
1959 /* -E: This is a local error message. This option is not intended for
1960 external use at all, but is not restricted to trusted callers because it
1961 does no harm (just suppresses certain error messages) and if Exim is run
1962 not setuid root it won't always be trusted when it generates error
1963 messages using this option. If there is a message id following -E, point
1964 message_reference at it, for logging. */
1967 local_error_message = TRUE;
1968 if (mac_ismsgid(argrest)) message_reference = argrest;
1972 /* -ex: The vacation program calls sendmail with the undocumented "-eq"
1973 option, so it looks as if historically the -oex options are also callable
1974 without the leading -o. So we have to accept them. Before the switch,
1975 anything starting -oe has been converted to -e. Exim does not support all
1976 of the sendmail error options. */
1979 if (Ustrcmp(argrest, "e") == 0)
1981 arg_error_handling = ERRORS_SENDER;
1982 errors_sender_rc = EXIT_SUCCESS;
1984 else if (Ustrcmp(argrest, "m") == 0) arg_error_handling = ERRORS_SENDER;
1985 else if (Ustrcmp(argrest, "p") == 0) arg_error_handling = ERRORS_STDERR;
1986 else if (Ustrcmp(argrest, "q") == 0) arg_error_handling = ERRORS_STDERR;
1987 else if (Ustrcmp(argrest, "w") == 0) arg_error_handling = ERRORS_SENDER;
1992 /* -F: Set sender's full name, used instead of the gecos entry from
1993 the password file. Since users can usually alter their gecos entries,
1994 there's no security involved in using this instead. The data can follow
1995 the -F or be in the next argument. */
2000 if(++i < argc) argrest = argv[i]; else
2001 { badarg = TRUE; break; }
2003 originator_name = argrest;
2004 sender_name_forced = TRUE;
2008 /* -f: Set sender's address - this value is only actually used if Exim is
2009 run by a trusted user, or if untrusted_set_sender is set and matches the
2010 address, except that the null address can always be set by any user. The
2011 test for this happens later, when the value given here is ignored when not
2012 permitted. For an untrusted user, the actual sender is still put in Sender:
2013 if it doesn't match the From: header (unless no_local_from_check is set).
2014 The data can follow the -f or be in the next argument. The -r switch is an
2015 obsolete form of -f but since there appear to be programs out there that
2016 use anything that sendmail has ever supported, better accept it - the
2017 synonymizing is done before the switch above.
2019 At this stage, we must allow domain literal addresses, because we don't
2020 know what the setting of allow_domain_literals is yet. Ditto for trailing
2021 dots and strip_trailing_dot. */
2029 if (i+1 < argc) argrest = argv[++i]; else
2030 { badarg = TRUE; break; }
2034 sender_address = string_sprintf(""); /* Ensure writeable memory */
2038 uschar *temp = argrest + Ustrlen(argrest) - 1;
2039 while (temp >= argrest && isspace(*temp)) temp--;
2040 if (temp >= argrest && *temp == '.') f_end_dot = TRUE;
2041 allow_domain_literals = TRUE;
2042 strip_trailing_dot = TRUE;
2043 sender_address = parse_extract_address(argrest, &errmess, &start, &end,
2044 &sender_address_domain, TRUE);
2045 allow_domain_literals = FALSE;
2046 strip_trailing_dot = FALSE;
2047 if (sender_address == NULL)
2049 fprintf(stderr, "exim: bad -f address \"%s\": %s\n", argrest, errmess);
2050 return EXIT_FAILURE;
2053 sender_address_forced = TRUE;
2057 /* This is some Sendmail thing which can be ignored */
2062 /* -h: Set the hop count for an incoming message. Exim does not currently
2063 support this; it always computes it by counting the Received: headers.
2064 To put it in will require a change to the spool header file format. */
2069 if(++i < argc) argrest = argv[i]; else
2070 { badarg = TRUE; break; }
2072 if (!isdigit(*argrest)) badarg = TRUE;
2076 /* -i: Set flag so dot doesn't end non-SMTP input (same as -oi, seems
2077 not to be documented for sendmail but mailx (at least) uses it) */
2080 if (*argrest == 0) dot_ends = FALSE; else badarg = TRUE;
2085 receiving_message = FALSE;
2087 /* -MC: continue delivery of another message via an existing open
2088 file descriptor. This option is used for an internal call by the
2089 smtp transport when there is a pending message waiting to go to an
2090 address to which it has got a connection. Five subsequent arguments are
2091 required: transport name, host name, IP address, sequence number, and
2092 message_id. Transports may decline to create new processes if the sequence
2093 number gets too big. The channel is stdin. This (-MC) must be the last
2094 argument. There's a subsequent check that the real-uid is privileged.
2096 If we are running in the test harness. delay for a bit, to let the process
2097 that set this one up complete. This makes for repeatability of the logging,
2100 if (Ustrcmp(argrest, "C") == 0)
2104 fprintf(stderr, "exim: too many or too few arguments after -MC\n");
2105 return EXIT_FAILURE;
2108 if (msg_action_arg >= 0)
2110 fprintf(stderr, "exim: incompatible arguments\n");
2111 return EXIT_FAILURE;
2114 continue_transport = argv[++i];
2115 continue_hostname = argv[++i];
2116 continue_host_address = argv[++i];
2117 continue_sequence = Uatoi(argv[++i]);
2118 msg_action = MSG_DELIVER;
2119 msg_action_arg = ++i;
2120 forced_delivery = TRUE;
2121 queue_run_pid = passed_qr_pid;
2122 queue_run_pipe = passed_qr_pipe;
2124 if (!mac_ismsgid(argv[i]))
2126 fprintf(stderr, "exim: malformed message id %s after -MC option\n",
2128 return EXIT_FAILURE;
2131 if (running_in_test_harness) millisleep(500);
2135 /* -MCA: set the smtp_authenticated flag; this is useful only when it
2136 precedes -MC (see above). The flag indicates that the host to which
2137 Exim is connected has accepted an AUTH sequence. */
2139 else if (Ustrcmp(argrest, "CA") == 0)
2141 smtp_authenticated = TRUE;
2145 /* -MCP: set the smtp_use_pipelining flag; this is useful only when
2146 it preceded -MC (see above) */
2148 else if (Ustrcmp(argrest, "CP") == 0)
2150 smtp_use_pipelining = TRUE;
2154 /* -MCQ: pass on the pid of the queue-running process that started
2155 this chain of deliveries and the fd of its synchronizing pipe; this
2156 is useful only when it precedes -MC (see above) */
2158 else if (Ustrcmp(argrest, "CQ") == 0)
2160 if(++i < argc) passed_qr_pid = (pid_t)(Uatol(argv[i]));
2162 if(++i < argc) passed_qr_pipe = (int)(Uatol(argv[i]));
2167 /* -MCS: set the smtp_use_size flag; this is useful only when it
2168 precedes -MC (see above) */
2170 else if (Ustrcmp(argrest, "CS") == 0)
2172 smtp_use_size = TRUE;
2176 /* -MCT: set the tls_offered flag; this is useful only when it
2177 precedes -MC (see above). The flag indicates that the host to which
2178 Exim is connected has offered TLS support. */
2181 else if (Ustrcmp(argrest, "CT") == 0)
2188 /* -M[x]: various operations on the following list of message ids:
2189 -M deliver the messages, ignoring next retry times and thawing
2190 -Mc deliver the messages, checking next retry times, no thawing
2191 -Mf freeze the messages
2192 -Mg give up on the messages
2193 -Mt thaw the messages
2194 -Mrm remove the messages
2195 In the above cases, this must be the last option. There are also the
2196 following options which are followed by a single message id, and which
2197 act on that message. Some of them use the "recipient" addresses as well.
2198 -Mar add recipient(s)
2199 -Mmad mark all recipients delivered
2200 -Mmd mark recipients(s) delivered
2207 else if (*argrest == 0)
2209 msg_action = MSG_DELIVER;
2210 forced_delivery = deliver_force_thaw = TRUE;
2212 else if (Ustrcmp(argrest, "ar") == 0)
2214 msg_action = MSG_ADD_RECIPIENT;
2215 one_msg_action = TRUE;
2217 else if (Ustrcmp(argrest, "c") == 0) msg_action = MSG_DELIVER;
2218 else if (Ustrcmp(argrest, "es") == 0)
2220 msg_action = MSG_EDIT_SENDER;
2221 one_msg_action = TRUE;
2223 else if (Ustrcmp(argrest, "f") == 0) msg_action = MSG_FREEZE;
2224 else if (Ustrcmp(argrest, "g") == 0)
2226 msg_action = MSG_DELIVER;
2227 deliver_give_up = TRUE;
2229 else if (Ustrcmp(argrest, "mad") == 0)
2231 msg_action = MSG_MARK_ALL_DELIVERED;
2233 else if (Ustrcmp(argrest, "md") == 0)
2235 msg_action = MSG_MARK_DELIVERED;
2236 one_msg_action = TRUE;
2238 else if (Ustrcmp(argrest, "rm") == 0) msg_action = MSG_REMOVE;
2239 else if (Ustrcmp(argrest, "t") == 0) msg_action = MSG_THAW;
2240 else if (Ustrcmp(argrest, "vb") == 0)
2242 msg_action = MSG_SHOW_BODY;
2243 one_msg_action = TRUE;
2245 else if (Ustrcmp(argrest, "vh") == 0)
2247 msg_action = MSG_SHOW_HEADER;
2248 one_msg_action = TRUE;
2250 else if (Ustrcmp(argrest, "vl") == 0)
2252 msg_action = MSG_SHOW_LOG;
2253 one_msg_action = TRUE;
2255 else { badarg = TRUE; break; }
2257 /* All the -Mxx options require at least one message id. */
2259 msg_action_arg = i + 1;
2260 if (msg_action_arg >= argc)
2262 fprintf(stderr, "exim: no message ids given after %s option\n", arg);
2263 return EXIT_FAILURE;
2266 /* Some require only message ids to follow */
2268 if (!one_msg_action)
2271 for (j = msg_action_arg; j < argc; j++) if (!mac_ismsgid(argv[j]))
2273 fprintf(stderr, "exim: malformed message id %s after %s option\n",
2275 return EXIT_FAILURE;
2277 goto END_ARG; /* Remaining args are ids */
2280 /* Others require only one message id, possibly followed by addresses,
2281 which will be handled as normal arguments. */
2285 if (!mac_ismsgid(argv[msg_action_arg]))
2287 fprintf(stderr, "exim: malformed message id %s after %s option\n",
2288 argv[msg_action_arg], arg);
2289 return EXIT_FAILURE;
2296 /* Some programs seem to call the -om option without the leading o;
2297 for sendmail it askes for "me too". Exim always does this. */
2300 if (*argrest != 0) badarg = TRUE;
2304 /* -N: don't do delivery - a debugging option that stops transports doing
2305 their thing. It implies debugging at the D_v level. */
2310 dont_deliver = TRUE;
2311 debug_selector |= D_v;
2312 debug_file = stderr;
2318 /* -n: This means "don't alias" in sendmail, apparently. Just ignore
2324 /* -O: Just ignore it. In sendmail, apparently -O option=value means set
2325 option to the specified value. This form uses long names. We need to handle
2326 -O option=value and -Ooption=value. */
2333 fprintf(stderr, "exim: string expected after -O\n");
2341 /* -oA: Set an argument for the bi command (sendmail's "alternate alias
2344 if (*argrest == 'A')
2346 alias_arg = argrest + 1;
2347 if (alias_arg[0] == 0)
2349 if (i+1 < argc) alias_arg = argv[++i]; else
2351 fprintf(stderr, "exim: string expected after -oA\n");
2357 /* -oB: Set a connection message max value for remote deliveries */
2359 else if (*argrest == 'B')
2361 uschar *p = argrest + 1;
2364 if (i+1 < argc && isdigit((argv[i+1][0]))) p = argv[++i]; else
2366 connection_max_messages = 1;
2375 fprintf(stderr, "exim: number expected after -oB\n");
2378 connection_max_messages = Uatoi(p);
2382 /* -odb: background delivery */
2384 else if (Ustrcmp(argrest, "db") == 0)
2386 synchronous_delivery = FALSE;
2387 arg_queue_only = FALSE;
2388 queue_only_set = TRUE;
2391 /* -odf: foreground delivery (smail-compatible option); same effect as
2392 -odi: interactive (synchronous) delivery (sendmail-compatible option)
2395 else if (Ustrcmp(argrest, "df") == 0 || Ustrcmp(argrest, "di") == 0)
2397 synchronous_delivery = TRUE;
2398 arg_queue_only = FALSE;
2399 queue_only_set = TRUE;
2402 /* -odq: queue only */
2404 else if (Ustrcmp(argrest, "dq") == 0)
2406 synchronous_delivery = FALSE;
2407 arg_queue_only = TRUE;
2408 queue_only_set = TRUE;
2411 /* -odqs: queue SMTP only - do local deliveries and remote routing,
2412 but no remote delivery */
2414 else if (Ustrcmp(argrest, "dqs") == 0)
2417 arg_queue_only = FALSE;
2418 queue_only_set = TRUE;
2421 /* -oex: Sendmail error flags. As these are also accepted without the
2422 leading -o prefix, for compatibility with vacation and other callers,
2423 they are handled with -e above. */
2425 /* -oi: Set flag so dot doesn't end non-SMTP input (same as -i)
2426 -oitrue: Another sendmail syntax for the same */
2428 else if (Ustrcmp(argrest, "i") == 0 ||
2429 Ustrcmp(argrest, "itrue") == 0)
2432 /* -oM*: Set various characteristics for an incoming message; actually
2433 acted on for trusted callers only. */
2435 else if (*argrest == 'M')
2439 fprintf(stderr, "exim: data expected after -o%s\n", argrest);
2443 /* -oMa: Set sender host address */
2445 if (Ustrcmp(argrest, "Ma") == 0) sender_host_address = argv[++i];
2447 /* -oMaa: Set authenticator name */
2449 else if (Ustrcmp(argrest, "Maa") == 0)
2450 sender_host_authenticated = argv[++i];
2452 /* -oMas: setting authenticated sender */
2454 else if (Ustrcmp(argrest, "Mas") == 0) authenticated_sender = argv[++i];
2456 /* -oMai: setting authenticated id */
2458 else if (Ustrcmp(argrest, "Mai") == 0) authenticated_id = argv[++i];
2460 /* -oMi: Set incoming interface address */
2462 else if (Ustrcmp(argrest, "Mi") == 0) interface_address = argv[++i];
2464 /* -oMr: Received protocol */
2466 else if (Ustrcmp(argrest, "Mr") == 0) received_protocol = argv[++i];
2468 /* -oMs: Set sender host name */
2470 else if (Ustrcmp(argrest, "Ms") == 0) sender_host_name = argv[++i];
2472 /* -oMt: Set sender ident */
2474 else if (Ustrcmp(argrest, "Mt") == 0) sender_ident = argv[++i];
2476 /* Else a bad argument */
2485 /* -om: Me-too flag for aliases. Exim always does this. Some programs
2486 seem to call this as -m (undocumented), so that is also accepted (see
2489 else if (Ustrcmp(argrest, "m") == 0) {}
2491 /* -oo: An ancient flag for old-style addresses which still seems to
2492 crop up in some calls (see in SCO). */
2494 else if (Ustrcmp(argrest, "o") == 0) {}
2496 /* -oP <name>: set pid file path for daemon */
2498 else if (Ustrcmp(argrest, "P") == 0)
2499 override_pid_file_path = argv[++i];
2501 /* -or <n>: set timeout for non-SMTP acceptance
2502 -os <n>: set timeout for SMTP acceptance */
2504 else if (*argrest == 'r' || *argrest == 's')
2506 int *tp = (*argrest == 'r')?
2507 &arg_receive_timeout : &arg_smtp_receive_timeout;
2508 if (argrest[1] == 0)
2510 if (i+1 < argc) *tp= readconf_readtime(argv[++i], 0, FALSE);
2512 else *tp = readconf_readtime(argrest + 1, 0, FALSE);
2515 fprintf(stderr, "exim: bad time value %s: abandoned\n", argv[i]);
2520 /* -oX <list>: Override local_interfaces and/or default daemon ports */
2522 else if (Ustrcmp(argrest, "X") == 0)
2523 override_local_interfaces = argv[++i];
2525 /* Unknown -o argument */
2531 /* -ps: force Perl startup; -pd force delayed Perl startup */
2535 if (*argrest == 's' && argrest[1] == 0)
2537 perl_start_option = 1;
2540 if (*argrest == 'd' && argrest[1] == 0)
2542 perl_start_option = -1;
2547 /* -panythingelse is taken as the Sendmail-compatible argument -prval:sval,
2548 which sets the host protocol and host name */
2552 if (i+1 < argc) argrest = argv[++i]; else
2553 { badarg = TRUE; break; }
2558 uschar *hn = Ustrchr(argrest, ':');
2561 received_protocol = argrest;
2565 received_protocol = string_copyn(argrest, hn - argrest);
2566 sender_host_name = hn + 1;
2573 receiving_message = FALSE;
2575 /* -qq...: Do queue runs in a 2-stage manner */
2577 if (*argrest == 'q')
2579 queue_2stage = TRUE;
2583 /* -qi...: Do only first (initial) deliveries */
2585 if (*argrest == 'i')
2587 queue_run_first_delivery = TRUE;
2591 /* -qf...: Run the queue, forcing deliveries
2592 -qff..: Ditto, forcing thawing as well */
2594 if (*argrest == 'f')
2596 queue_run_force = TRUE;
2597 if (*(++argrest) == 'f')
2599 deliver_force_thaw = TRUE;
2604 /* -q[f][f]l...: Run the queue only on local deliveries */
2606 if (*argrest == 'l')
2608 queue_run_local = TRUE;
2612 /* -q[f][f][l]: Run the queue, optionally forced, optionally local only,
2613 optionally starting from a given message id. */
2615 if (*argrest == 0 &&
2616 (i + 1 >= argc || argv[i+1][0] == '-' || mac_ismsgid(argv[i+1])))
2619 if (i+1 < argc && mac_ismsgid(argv[i+1]))
2620 start_queue_run_id = argv[++i];
2621 if (i+1 < argc && mac_ismsgid(argv[i+1]))
2622 stop_queue_run_id = argv[++i];
2625 /* -q[f][f][l]<n>: Run the queue at regular intervals, optionally forced,
2626 optionally local only. */
2631 queue_interval = readconf_readtime(argrest, 0, FALSE);
2633 queue_interval = readconf_readtime(argv[++i], 0, FALSE);
2634 if (queue_interval <= 0)
2636 fprintf(stderr, "exim: bad time value %s: abandoned\n", argv[i]);
2643 case 'R': /* Synonymous with -qR... */
2644 receiving_message = FALSE;
2646 /* -Rf: As -R (below) but force all deliveries,
2647 -Rff: Ditto, but also thaw all frozen messages,
2648 -Rr: String is regex
2649 -Rrf: Regex and force
2650 -Rrff: Regex and force and thaw
2652 in all cases provided there are no further characters in this
2658 for (i = 0; i < sizeof(rsopts)/sizeof(uschar *); i++)
2660 if (Ustrcmp(argrest, rsopts[i]) == 0)
2662 if (i != 2) queue_run_force = TRUE;
2663 if (i >= 2) deliver_selectstring_regex = TRUE;
2664 if (i == 1 || i == 4) deliver_force_thaw = TRUE;
2665 argrest += Ustrlen(rsopts[i]);
2670 /* -R: Set string to match in addresses for forced queue run to
2671 pick out particular messages. */
2675 if (i+1 < argc) deliver_selectstring = argv[++i]; else
2677 fprintf(stderr, "exim: string expected after -R\n");
2681 else deliver_selectstring = argrest;
2682 if (queue_interval < 0) queue_interval = 0;
2686 /* -r: an obsolete synonym for -f (see above) */
2689 /* -S: Like -R but works on sender. */
2691 case 'S': /* Synonymous with -qS... */
2692 receiving_message = FALSE;
2694 /* -Sf: As -S (below) but force all deliveries,
2695 -Sff: Ditto, but also thaw all frozen messages,
2696 -Sr: String is regex
2697 -Srf: Regex and force
2698 -Srff: Regex and force and thaw
2700 in all cases provided there are no further characters in this
2706 for (i = 0; i < sizeof(rsopts)/sizeof(uschar *); i++)
2708 if (Ustrcmp(argrest, rsopts[i]) == 0)
2710 if (i != 2) queue_run_force = TRUE;
2711 if (i >= 2) deliver_selectstring_sender_regex = TRUE;
2712 if (i == 1 || i == 4) deliver_force_thaw = TRUE;
2713 argrest += Ustrlen(rsopts[i]);
2718 /* -S: Set string to match in addresses for forced queue run to
2719 pick out particular messages. */
2723 if (i+1 < argc) deliver_selectstring_sender = argv[++i]; else
2725 fprintf(stderr, "exim: string expected after -S\n");
2729 else deliver_selectstring_sender = argrest;
2730 if (queue_interval < 0) queue_interval = 0;
2733 /* -Tqt is an option that is exclusively for use by the testing suite.
2734 It is not recognized in other circumstances. It allows for the setting up
2735 of explicit "queue times" so that various warning/retry things can be
2736 tested. Otherwise variability of clock ticks etc. cause problems. */
2739 if (running_in_test_harness && Ustrcmp(argrest, "qt") == 0)
2740 fudged_queue_times = argv[++i];
2745 /* -t: Set flag to extract recipients from body of message. */
2748 if (*argrest == 0) extract_recipients = TRUE;
2750 /* -ti: Set flag to extract recipients from body of message, and also
2751 specify that dot does not end the message. */
2753 else if (Ustrcmp(argrest, "i") == 0)
2755 extract_recipients = TRUE;
2759 /* -tls-on-connect: don't wait for STARTTLS (for old clients) */
2762 else if (Ustrcmp(argrest, "ls-on-connect") == 0) tls_on_connect = TRUE;
2769 /* -U: This means "initial user submission" in sendmail, apparently. The
2770 doc claims that in future sendmail may refuse syntactically invalid
2771 messages instead of fixing them. For the moment, we just ignore it. */
2777 /* -v: verify things - this is a very low-level debugging */
2782 debug_selector |= D_v;
2783 debug_file = stderr;
2789 /* -x: AIX uses this to indicate some fancy 8-bit character stuff:
2791 The -x flag tells the sendmail command that mail from a local
2792 mail program has National Language Support (NLS) extended characters
2793 in the body of the mail item. The sendmail command can send mail with
2794 extended NLS characters across networks that normally corrupts these
2797 As Exim is 8-bit clean, it just ignores this flag. */
2800 if (*argrest != 0) badarg = TRUE;
2803 /* All other initial characters are errors */
2808 } /* End of high-level switch statement */
2810 /* Failed to recognize the option, or syntax error */
2814 fprintf(stderr, "exim abandoned: unknown, malformed, or incomplete "
2815 "option %s\n", arg);
2821 /* Arguments have been processed. Check for incompatibilities. */
2825 (smtp_input || extract_recipients || recipients_arg < argc) &&
2826 (daemon_listen || queue_interval >= 0 || bi_option ||
2827 test_retry_arg >= 0 || test_rewrite_arg >= 0 ||
2828 filter_test != FTEST_NONE || (msg_action_arg > 0 && !one_msg_action))
2831 msg_action_arg > 0 &&
2832 (daemon_listen || queue_interval >= 0 || list_options || checking ||
2833 bi_option || test_retry_arg >= 0 || test_rewrite_arg >= 0)
2836 (daemon_listen || queue_interval >= 0) &&
2837 (sender_address != NULL || list_options || list_queue || checking ||
2841 daemon_listen && queue_interval == 0
2845 (checking || smtp_input || extract_recipients ||
2846 filter_test != FTEST_NONE || bi_option)
2849 verify_address_mode &&
2850 (address_test_mode || smtp_input || extract_recipients ||
2851 filter_test != FTEST_NONE || bi_option)
2854 address_test_mode && (smtp_input || extract_recipients ||
2855 filter_test != FTEST_NONE || bi_option)
2858 smtp_input && (sender_address != NULL || filter_test != FTEST_NONE ||
2862 deliver_selectstring != NULL && queue_interval < 0
2866 fprintf(stderr, "exim: incompatible command-line options or arguments\n");
2870 /* If debugging is set up, set the file and the file descriptor to pass on to
2871 child processes. It should, of course, be 2 for stderr. Also, force the daemon
2872 to run in the foreground. */
2874 if (debug_selector != 0)
2876 debug_file = stderr;
2877 debug_fd = fileno(debug_file);
2878 background_daemon = FALSE;
2879 if (running_in_test_harness) millisleep(100); /* lets caller finish */
2880 if (debug_selector != D_v) /* -v only doesn't show this */
2882 debug_printf("Exim version %s uid=%ld gid=%ld pid=%d D=%x\n",
2883 version_string, (long int)real_uid, (long int)real_gid, (int)getpid(),
2885 show_whats_supported(stderr);
2889 /* When started with root privilege, ensure that the limits on the number of
2890 open files and the number of processes (where that is accessible) are
2891 sufficiently large, or are unset, in case Exim has been called from an
2892 environment where the limits are screwed down. Not all OS have the ability to
2893 change some of these limits. */
2897 DEBUG(D_any) debug_print_ids(US"Exim has no root privilege:");
2903 #ifdef RLIMIT_NOFILE
2904 if (getrlimit(RLIMIT_NOFILE, &rlp) < 0)
2906 log_write(0, LOG_MAIN|LOG_PANIC, "getrlimit(RLIMIT_NOFILE) failed: %s",
2908 rlp.rlim_cur = rlp.rlim_max = 0;
2911 /* I originally chose 1000 as a nice big number that was unlikely to
2912 be exceeded. It turns out that some older OS have a fixed upper limit of
2915 if (rlp.rlim_cur < 1000)
2917 rlp.rlim_cur = rlp.rlim_max = 1000;
2918 if (setrlimit(RLIMIT_NOFILE, &rlp) < 0)
2920 rlp.rlim_cur = rlp.rlim_max = 256;
2921 if (setrlimit(RLIMIT_NOFILE, &rlp) < 0)
2922 log_write(0, LOG_MAIN|LOG_PANIC, "setrlimit(RLIMIT_NOFILE) failed: %s",
2929 if (getrlimit(RLIMIT_NPROC, &rlp) < 0)
2931 log_write(0, LOG_MAIN|LOG_PANIC, "getrlimit(RLIMIT_NPROC) failed: %s",
2933 rlp.rlim_cur = rlp.rlim_max = 0;
2936 #ifdef RLIM_INFINITY
2937 if (rlp.rlim_cur != RLIM_INFINITY && rlp.rlim_cur < 1000)
2939 rlp.rlim_cur = rlp.rlim_max = RLIM_INFINITY;
2941 if (rlp.rlim_cur < 1000)
2943 rlp.rlim_cur = rlp.rlim_max = 1000;
2945 if (setrlimit(RLIMIT_NPROC, &rlp) < 0)
2946 log_write(0, LOG_MAIN|LOG_PANIC, "setrlimit(RLIMIT_NPROC) failed: %s",
2952 /* Exim is normally entered as root (but some special configurations are
2953 possible that don't do this). However, it always spins off sub-processes that
2954 set their uid and gid as required for local delivery. We don't want to pass on
2955 any extra groups that root may belong to, so we want to get rid of them all at
2958 We need to obey setgroups() at this stage, before possibly giving up root
2959 privilege for a changed configuration file, but later on we might need to
2960 check on the additional groups for the admin user privilege - can't do that
2961 till after reading the config, which might specify the exim gid. Therefore,
2962 save the group list here first. */
2964 group_count = getgroups(NGROUPS_MAX, group_list);
2966 /* There is a fundamental difference in some BSD systems in the matter of
2967 groups. FreeBSD and BSDI are known to be different; NetBSD and OpenBSD are
2968 known not to be different. On the "different" systems there is a single group
2969 list, and the first entry in it is the current group. On all other versions of
2970 Unix there is a supplementary group list, which is in *addition* to the current
2971 group. Consequently, to get rid of all extraneous groups on a "standard" system
2972 you pass over 0 groups to setgroups(), while on a "different" system you pass
2973 over a single group - the current group, which is always the first group in the
2974 list. Calling setgroups() with zero groups on a "different" system results in
2975 an error return. The following code should cope with both types of system.
2977 However, if this process isn't running as root, setgroups() can't be used
2978 since you have to be root to run it, even if throwing away groups. Not being
2979 root here happens only in some unusual configurations. We just ignore the
2982 if (setgroups(0, NULL) != 0)
2984 if (setgroups(1, group_list) != 0 && !unprivileged)
2986 fprintf(stderr, "exim: setgroups() failed: %s\n", strerror(errno));
2991 /* If the configuration file name has been altered by an argument on the
2992 command line (either a new file name or a macro definition) and the caller is
2993 not root or the exim user, or if this is a filter testing run, remove any
2994 setuid privilege the program has, and run as the underlying user.
2996 If ALT_CONFIG_ROOT_ONLY is defined, the exim user is locked out of this, which
2997 severely restricts the use of -C for some purposes.
2999 Otherwise, set the real ids to the effective values (should be root unless run
3000 from inetd, which it can either be root or the exim uid, if one is configured).
3002 There is a private mechanism for bypassing some of this, in order to make it
3003 possible to test lots of configurations automatically, without having either to
3004 recompile each time, or to patch in an actual configuration file name and other
3005 values (such as the path name). If running in the test harness, pretend that
3006 configuration file changes and macro definitions haven't happened. */
3009 (config_changed || macros != NULL) && /* Config changed, and */
3010 real_uid != root_uid && /* Not root, and */
3011 #ifndef ALT_CONFIG_ROOT_ONLY /* (when not locked out) */
3012 real_uid != exim_uid && /* Not exim, and */
3014 !running_in_test_harness /* Not fudged */
3016 expansion_test /* expansion testing */
3018 filter_test != FTEST_NONE) /* Filter testing */
3020 setgroups(group_count, group_list);
3021 exim_setugid(real_uid, real_gid, FALSE,
3022 US"-C, -D, -be or -bf forces real uid");
3023 removed_privilege = TRUE;
3025 /* In the normal case when Exim is called like this, stderr is available
3026 and should be used for any logging information because attempts to write
3027 to the log will usually fail. To arrange this, we unset really_exim. However,
3028 if no stderr is available there is no point - we might as well have a go
3029 at the log (if it fails, syslog will be written). */
3031 if (log_stderr != NULL) really_exim = FALSE;
3034 /* Privilege is to be retained for the moment. It may be dropped later,
3035 depending on the job that this Exim process has been asked to do. For now, set
3036 the real uid to the effective so that subsequent re-execs of Exim are done by a
3039 else exim_setugid(geteuid(), getegid(), FALSE, US"forcing real = effective");
3041 /* If testing a filter, open the file(s) now, before wasting time doing other
3042 setups and reading the message. */
3044 if ((filter_test & FTEST_SYSTEM) != 0)
3046 filter_sfd = Uopen(filter_test_sfile, O_RDONLY, 0);
3049 fprintf(stderr, "exim: failed to open %s: %s\n", filter_test_sfile,
3051 return EXIT_FAILURE;
3055 if ((filter_test & FTEST_USER) != 0)
3057 filter_ufd = Uopen(filter_test_ufile, O_RDONLY, 0);
3060 fprintf(stderr, "exim: failed to open %s: %s\n", filter_test_ufile,
3062 return EXIT_FAILURE;
3066 /* Read the main runtime configuration data; this gives up if there
3067 is a failure. It leaves the configuration file open so that the subsequent
3068 configuration data for delivery can be read if needed. */
3072 /* Handle the decoding of logging options. */
3074 decode_bits(&log_write_selector, &log_extra_selector, 0, 0, log_selector_string,
3075 log_options, log_options_count, US"log");
3079 debug_printf("configuration file is %s\n", config_main_filename);
3080 debug_printf("log selectors = %08x %08x\n", log_write_selector,
3081 log_extra_selector);
3084 /* If domain literals are not allowed, check the sender address that was
3085 supplied with -f. Ditto for a stripped trailing dot. */
3087 if (sender_address != NULL)
3089 if (sender_address[sender_address_domain] == '[' && !allow_domain_literals)
3091 fprintf(stderr, "exim: bad -f address \"%s\": domain literals not "
3092 "allowed\n", sender_address);
3093 return EXIT_FAILURE;
3095 if (f_end_dot && !strip_trailing_dot)
3097 fprintf(stderr, "exim: bad -f address \"%s.\": domain is malformed "
3098 "(trailing dot not allowed)\n", sender_address);
3099 return EXIT_FAILURE;
3103 /* Paranoia check of maximum lengths of certain strings. There is a check
3104 on the length of the log file path in log.c, which will come into effect
3105 if there are any calls to write the log earlier than this. However, if we
3106 get this far but the string is very long, it is better to stop now than to
3107 carry on and (e.g.) receive a message and then have to collapse. The call to
3108 log_write() from here will cause the ultimate panic collapse if the complete
3109 file name exceeds the buffer length. */
3111 if (Ustrlen(log_file_path) > 200)
3112 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3113 "log_file_path is longer than 200 chars: aborting");
3115 if (Ustrlen(pid_file_path) > 200)
3116 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3117 "pid_file_path is longer than 200 chars: aborting");
3119 if (Ustrlen(spool_directory) > 200)
3120 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3121 "spool_directory is longer than 200 chars: aborting");
3123 /* Length check on the process name given to syslog for its TAG field,
3124 which is only permitted to be 32 characters or less. See RFC 3164. */
3126 if (Ustrlen(syslog_processname) > 32)
3127 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3128 "syslog_processname is longer than 32 chars: aborting");
3130 /* In some operating systems, the environment variable TMPDIR controls where
3131 temporary files are created; Exim doesn't use these (apart from when delivering
3132 to MBX mailboxes), but called libraries such as DBM libraries may require them.
3133 If TMPDIR is found in the environment, reset it to the value defined in the
3134 TMPDIR macro, if this macro is defined. */
3139 for (p = USS environ; *p != NULL; p++)
3141 if (Ustrncmp(*p, "TMPDIR=", 7) == 0 &&
3142 Ustrcmp(*p+7, TMPDIR) != 0)
3144 uschar *newp = malloc(Ustrlen(TMPDIR) + 8);
3145 sprintf(CS newp, "TMPDIR=%s", TMPDIR);
3147 DEBUG(D_any) debug_printf("reset TMPDIR=%s in environment\n", TMPDIR);
3153 /* Timezone handling. If timezone_string is "utc", set a flag to cause all
3154 timestamps to be in UTC (gmtime() is used instead of localtime()). Otherwise,
3155 we may need to get rid of a bogus timezone setting. This can arise when Exim is
3156 called by a user who has set the TZ variable. This then affects the timestamps
3157 in log files and in Received: headers, and any created Date: header lines. The
3158 required timezone is settable in the configuration file, so nothing can be done
3159 about this earlier - but hopefully nothing will normally be logged earlier than
3160 this. We have to make a new environment if TZ is wrong, but don't bother if
3161 timestamps_utc is set, because then all times are in UTC anyway. */
3163 if (timezone_string != NULL && strcmpic(timezone_string, US"UTC") == 0)
3165 timestamps_utc = TRUE;
3169 uschar *envtz = US getenv("TZ");
3170 if ((envtz == NULL && timezone_string != NULL) ||
3172 (timezone_string == NULL ||
3173 Ustrcmp(timezone_string, envtz) != 0)))
3175 uschar **p = USS environ;
3179 while (*p++ != NULL) count++;
3180 if (envtz == NULL) count++;
3181 newp = new = malloc(sizeof(uschar *) * (count + 1));
3182 for (p = USS environ; *p != NULL; p++)
3184 if (Ustrncmp(*p, "TZ=", 3) == 0) continue;
3187 if (timezone_string != NULL)
3189 *newp = malloc(Ustrlen(timezone_string) + 4);
3190 sprintf(CS *newp++, "TZ=%s", timezone_string);
3195 DEBUG(D_any) debug_printf("Reset TZ to %s: time is %s\n", timezone_string,
3196 tod_stamp(tod_log));
3200 /* Handle the case when we have removed the setuid privilege because of -C or
3201 -D. This means that the caller of Exim was not root, and, provided that
3202 ALT_CONFIG_ROOT_ONLY is not defined, was not the Exim user that is built into
3205 If ALT_CONFIG_ROOT_ONLY is not defined, there is a problem if it turns out we
3206 were running as the exim user defined in the configuration file (different to
3207 the one in the binary). The sysadmin may expect this case to retain privilege
3208 because "the binary was called by the Exim user", but it hasn't, because of the
3209 order in which it handles this stuff. There are two possibilities:
3211 (1) If deliver_drop_privilege is set, Exim is not going to re-exec in order
3212 to do message deliveries. Thus, the fact that it is running as a
3213 non-privileged user is plausible, and might be wanted in some special
3214 configurations. However, really_exim will have been set false when
3215 privilege was dropped, to stop Exim trying to write to its normal log
3216 files. Therefore, re-enable normal log processing, assuming the sysadmin
3217 has set up the log directory correctly.
3219 (2) If deliver_drop_privilege is not set, the configuration won't work as
3220 apparently intended, and so we log a panic message. In order to retain
3221 root for -C or -D, the caller must either be root or the Exim user
3222 defined in the binary (when deliver_drop_ privilege is false).
3224 If ALT_CONFIG_ROOT_ONLY is defined, we don't know whether we were called by the
3225 built-in exim user or one defined in the configuration. In either event,
3226 re-enable log processing, assuming the sysadmin knows what they are doing. */
3228 if (removed_privilege && (config_changed || macros != NULL) &&
3229 real_uid == exim_uid)
3231 #ifdef ALT_CONFIG_ROOT_ONLY
3232 really_exim = TRUE; /* let logging work normally */
3235 if (deliver_drop_privilege)
3236 really_exim = TRUE; /* let logging work normally */
3238 log_write(0, LOG_MAIN|LOG_PANIC,
3239 "exim user (uid=%d) is defined only at runtime; privilege lost for %s",
3240 (int)exim_uid, config_changed? "-C" : "-D");
3244 /* Start up Perl interpreter if Perl support is configured and there is a
3245 perl_startup option, and the configuration or the command line specifies
3246 initializing starting. Note that the global variables are actually called
3247 opt_perl_xxx to avoid clashing with perl's namespace (perl_*). */
3250 if (perl_start_option != 0)
3251 opt_perl_at_start = (perl_start_option > 0);
3252 if (opt_perl_at_start && opt_perl_startup != NULL)
3255 DEBUG(D_any) debug_printf("Starting Perl interpreter\n");
3256 errstr = init_perl(opt_perl_startup);
3259 fprintf(stderr, "exim: error in perl_startup code: %s\n", errstr);
3260 return EXIT_FAILURE;
3262 opt_perl_started = TRUE;
3264 #endif /* EXIM_PERL */
3266 /* Log the arguments of the call if the configuration file said so. This is
3267 a debugging feature for finding out what arguments certain MUAs actually use.
3268 Don't attempt it if logging is disabled, or if listing variables or if
3269 verifying/testing addresses or expansions. */
3271 if (((debug_selector & D_any) != 0 || (log_extra_selector & LX_arguments) != 0)
3272 && really_exim && !list_options && !checking)
3275 uschar *p = big_buffer;
3277 (void)getcwd(CS p+4, big_buffer_size - 4);
3279 (void)string_format(p, big_buffer_size - (p - big_buffer), " %d args:", argc);
3281 for (i = 0; i < argc; i++)
3283 int len = Ustrlen(argv[i]);
3286 if (p + len + 8 >= big_buffer + big_buffer_size)
3289 log_write(0, LOG_MAIN, "%s", big_buffer);
3290 Ustrcpy(big_buffer, "...");
3293 printing = string_printing(argv[i]);
3294 if (printing[0] == 0) quote = US"\""; else
3296 uschar *pp = printing;
3298 while (*pp != 0) if (isspace(*pp++)) { quote = US"\""; break; }
3300 sprintf(CS p, " %s%.*s%s", quote, (int)(big_buffer_size -
3301 (p - big_buffer) - 4), printing, quote);
3305 if ((log_extra_selector & LX_arguments) != 0)
3306 log_write(0, LOG_MAIN, "%s", big_buffer);
3308 debug_printf("%s\n", big_buffer);
3311 /* Set the working directory to be the top-level spool directory. We don't rely
3312 on this in the code, which always uses fully qualified names, but it's useful
3313 for core dumps etc. Don't complain if it fails - the spool directory might not
3314 be generally accessible and calls with the -C option (and others) have lost
3315 privilege by now. Before the chdir, we try to ensure that the directory exists.
3318 if (Uchdir(spool_directory) != 0)
3320 (void)directory_make(spool_directory, US"", SPOOL_DIRECTORY_MODE, FALSE);
3321 (void)Uchdir(spool_directory);
3324 /* Handle calls with the -bi option. This is a sendmail option to rebuild *the*
3325 alias file. Exim doesn't have such a concept, but this call is screwed into
3326 Sun's YP makefiles. Handle this by calling a configured script, as the real
3327 user who called Exim. The -oA option can be used to pass an argument to the
3332 (void)fclose(config_file);
3333 if (bi_command != NULL)
3337 argv[i++] = bi_command;
3338 if (alias_arg != NULL) argv[i++] = alias_arg;
3341 setgroups(group_count, group_list);
3342 exim_setugid(real_uid, real_gid, FALSE, US"running bi_command");
3344 DEBUG(D_exec) debug_printf("exec %.256s %.256s\n", argv[0],
3345 (argv[1] == NULL)? US"" : argv[1]);
3347 execv(CS argv[0], (char *const *)argv);
3348 fprintf(stderr, "exim: exec failed: %s\n", strerror(errno));
3353 DEBUG(D_any) debug_printf("-bi used but bi_command not set; exiting\n");
3358 /* If an action on specific messages is requested, or if a daemon or queue
3359 runner is being started, we need to know if Exim was called by an admin user.
3360 This is the case if the real user is root or exim, or if the real group is
3361 exim, or if one of the supplementary groups is exim or a group listed in
3362 admin_groups. We don't fail all message actions immediately if not admin_user,
3363 since some actions can be performed by non-admin users. Instead, set admin_user
3364 for later interrogation. */
3366 if (real_uid == root_uid || real_uid == exim_uid || real_gid == exim_gid)
3372 for (i = 0; i < group_count; i++)
3374 if (group_list[i] == exim_gid) admin_user = TRUE;
3375 else if (admin_groups != NULL)
3377 for (j = 1; j <= (int)(admin_groups[0]); j++)
3378 if (admin_groups[j] == group_list[i])
3379 { admin_user = TRUE; break; }
3381 if (admin_user) break;
3385 /* Another group of privileged users are the trusted users. These are root,
3386 exim, and any caller matching trusted_users or trusted_groups. Trusted callers
3387 are permitted to specify sender_addresses with -f on the command line, and
3388 other message parameters as well. */
3390 if (real_uid == root_uid || real_uid == exim_uid)
3391 trusted_caller = TRUE;
3396 if (trusted_users != NULL)
3398 for (i = 1; i <= (int)(trusted_users[0]); i++)
3399 if (trusted_users[i] == real_uid)
3400 { trusted_caller = TRUE; break; }
3403 if (!trusted_caller && trusted_groups != NULL)
3405 for (i = 1; i <= (int)(trusted_groups[0]); i++)
3407 if (trusted_groups[i] == real_gid)
3408 trusted_caller = TRUE;
3409 else for (j = 0; j < group_count; j++)
3411 if (trusted_groups[i] == group_list[j])
3412 { trusted_caller = TRUE; break; }
3414 if (trusted_caller) break;
3419 if (trusted_caller) DEBUG(D_any) debug_printf("trusted user\n");
3420 if (admin_user) DEBUG(D_any) debug_printf("admin user\n");
3422 /* Only an admin user may start the daemon or force a queue run in the default
3423 configuration, but the queue run restriction can be relaxed. Only an admin
3424 user may request that a message be returned to its sender forthwith. Only an
3425 admin user may specify a debug level greater than D_v (because it might show
3426 passwords, etc. in lookup queries). Only an admin user may request a queue
3431 BOOL debugset = (debug_selector & ~D_v) != 0;
3432 if (deliver_give_up || daemon_listen ||
3433 (count_queue && queue_list_requires_admin) ||
3434 (list_queue && queue_list_requires_admin) ||
3435 (queue_interval >= 0 && prod_requires_admin) ||
3436 (debugset && !running_in_test_harness))
3438 fprintf(stderr, "exim:%s permission denied\n", debugset? " debugging" : "");
3443 /* If the real user is not root or the exim uid, the argument for passing
3444 in an open TCP/IP connection for another message is not permitted, nor is
3445 running with the -N option for any delivery action, unless this call to exim is
3446 one that supplied an input message, or we are using a patched exim for
3447 regression testing. */
3449 if (real_uid != root_uid && real_uid != exim_uid &&
3450 (continue_hostname != NULL ||
3452 (queue_interval >= 0 || daemon_listen || msg_action_arg > 0)
3453 )) && !running_in_test_harness)
3455 fprintf(stderr, "exim: Permission denied\n");
3456 return EXIT_FAILURE;
3459 /* If the caller is not trusted, certain arguments are ignored when running for
3460 real, but are permitted when checking things (-be, -bv, -bt, -bh, -bf, -bF).
3461 Note that authority for performing certain actions on messages is tested in the
3462 queue_action() function. */
3464 if (!trusted_caller && !checking && filter_test == FTEST_NONE)
3466 sender_host_name = sender_host_address = interface_address =
3467 sender_ident = received_protocol = NULL;
3468 sender_host_port = interface_port = 0;
3469 sender_host_authenticated = authenticated_sender = authenticated_id = NULL;
3472 /* If a sender host address is set, extract the optional port number off the
3473 end of it and check its syntax. Do the same thing for the interface address.
3474 Exim exits if the syntax is bad. */
3478 if (sender_host_address != NULL)
3479 sender_host_port = check_port(sender_host_address);
3480 if (interface_address != NULL)
3481 interface_port = check_port(interface_address);
3484 /* If an SMTP message is being received check to see if the standard input is a
3485 TCP/IP socket. If it is, we assume that Exim was called from inetd if the
3486 caller is root or the Exim user, or if the port is a privileged one. Otherwise,
3491 union sockaddr_46 inetd_sock;
3492 EXIM_SOCKLEN_T size = sizeof(inetd_sock);
3493 if (getpeername(0, (struct sockaddr *)(&inetd_sock), &size) == 0)
3495 int family = ((struct sockaddr *)(&inetd_sock))->sa_family;
3496 if (family == AF_INET || family == AF_INET6)
3498 union sockaddr_46 interface_sock;
3499 size = sizeof(interface_sock);
3501 if (getsockname(0, (struct sockaddr *)(&interface_sock), &size) == 0)
3502 interface_address = host_ntoa(-1, &interface_sock, NULL,
3505 if (host_is_tls_on_connect_port(interface_port)) tls_on_connect = TRUE;
3507 if (real_uid == root_uid || real_uid == exim_uid || interface_port < 1024)
3510 sender_host_address = host_ntoa(-1, (struct sockaddr *)(&inetd_sock),
3511 NULL, &sender_host_port);
3512 if (mua_wrapper) log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Input from "
3513 "inetd is not supported when mua_wrapper is set");
3518 "exim: Permission denied (unprivileged user, unprivileged port)\n");
3519 return EXIT_FAILURE;
3525 /* If the load average is going to be needed while receiving a message, get it
3526 now for those OS that require the first call to os_getloadavg() to be done as
3527 root. There will be further calls later for each message received. */
3529 #ifdef LOAD_AVG_NEEDS_ROOT
3530 if (receiving_message &&
3531 (queue_only_load >= 0 ||
3532 (is_inetd && smtp_load_reserve >= 0)
3535 load_average = os_getloadavg();
3539 /* The queue_only configuration option can be overridden by -odx on the command
3540 line, except that if queue_only_override is false, queue_only cannot be unset
3541 from the command line. */
3543 if (queue_only_set && (queue_only_override || arg_queue_only))
3544 queue_only = arg_queue_only;
3546 /* The receive_timeout and smtp_receive_timeout options can be overridden by
3549 if (arg_receive_timeout >= 0) receive_timeout = arg_receive_timeout;
3550 if (arg_smtp_receive_timeout >= 0)
3551 smtp_receive_timeout = arg_smtp_receive_timeout;
3553 /* If Exim was started with root privilege, unless we have already removed the
3554 root privilege above as a result of -C, -D, -be, -bf or -bF, remove it now
3555 except when starting the daemon or doing some kind of delivery or address
3556 testing (-bt). These are the only cases when root need to be retained. We run
3557 as exim for -bv and -bh. However, if deliver_drop_privilege is set, root is
3558 retained only for starting the daemon. */
3560 if (!unprivileged && /* originally had root AND */
3561 !removed_privilege && /* still got root AND */
3562 !daemon_listen && /* not starting the daemon */
3563 queue_interval <= 0 && /* (either kind of daemon) */
3565 deliver_drop_privilege || /* requested unprivileged */
3567 queue_interval < 0 && /* not running the queue */
3568 (msg_action_arg < 0 || /* and */
3569 msg_action != MSG_DELIVER) && /* not delivering and */
3570 (!checking || !address_test_mode) /* not address checking */
3574 exim_setugid(exim_uid, exim_gid, FALSE, US"privilege not needed");
3577 /* When we are retaining a privileged uid, we still change to the exim gid. */
3579 else setgid(exim_gid);
3581 /* Handle a request to list the delivery queue */
3585 set_process_info("listing the queue");
3586 queue_list(list_queue_option, argv + recipients_arg, argc - recipients_arg);
3590 /* Handle a request to count the delivery queue */
3594 set_process_info("counting the queue");
3599 /* Handle actions on specific messages, except for the force delivery action,
3600 which is done below. Some actions take a whole list of message ids, which
3601 are known to continue up to the end of the arguments. Others take a single
3602 message id and then operate on the recipients list. */
3604 if (msg_action_arg > 0 && msg_action != MSG_DELIVER)
3606 int yield = EXIT_SUCCESS;
3607 set_process_info("acting on specified messages");
3609 if (!one_msg_action)
3611 for (i = msg_action_arg; i < argc; i++)
3612 if (!queue_action(argv[i], msg_action, NULL, 0, 0))
3613 yield = EXIT_FAILURE;
3616 else if (!queue_action(argv[msg_action_arg], msg_action, argv, argc,
3617 recipients_arg)) yield = EXIT_FAILURE;
3621 /* All the modes below here require the remaining configuration sections
3622 to be read, except that we can skip over the ACL setting when delivering
3623 specific messages, or doing a queue run. (For various testing cases we could
3624 skip too, but as they are rare, it doesn't really matter.) The argument is TRUE
3627 readconf_rest(msg_action_arg > 0 || (queue_interval == 0 && !daemon_listen));
3629 /* The configuration data will have been read into POOL_PERM because we won't
3630 ever want to reset back past it. Change the current pool to POOL_MAIN. In fact,
3631 this is just a bit of pedantic tidiness. It wouldn't really matter if the
3632 configuration were read into POOL_MAIN, because we don't do any resets till
3633 later on. However, it seems right, and it does ensure that both pools get used.
3636 store_pool = POOL_MAIN;
3638 /* Handle the -brt option. This is for checking out retry configurations.
3639 The next three arguments are a domain name or a complete address, and
3640 optionally two error numbers. All it does is to call the function that
3641 scans the retry configuration data. */
3643 if (test_retry_arg >= 0)
3645 retry_config *yield;
3646 int basic_errno = 0;
3650 if (test_retry_arg >= argc)
3652 printf("-brt needs a domain or address argument\n");
3653 exim_exit(EXIT_FAILURE);
3655 s1 = argv[test_retry_arg++];
3658 /* If the first argument contains no @ and no . it might be a local user
3659 or it might be a single-component name. Treat as a domain. */
3661 if (Ustrchr(s1, '@') == NULL && Ustrchr(s1, '.') == NULL)
3663 printf("Warning: \"%s\" contains no '@' and no '.' characters. It is "
3664 "being \ntreated as a one-component domain, not as a local part.\n\n",
3668 /* There may be an optional second domain arg. */
3670 if (test_retry_arg < argc && Ustrchr(argv[test_retry_arg], '.') != NULL)
3671 s2 = argv[test_retry_arg++];
3673 /* The final arg is an error name */
3675 if (test_retry_arg < argc)
3677 uschar *ss = argv[test_retry_arg];
3679 readconf_retry_error(ss, ss + Ustrlen(ss), &basic_errno, &more_errno);
3682 printf("%s\n", CS error);
3683 return EXIT_FAILURE;
3686 /* For the rcpt_4xx errors, a value of 255 means "any", and a code > 100 as
3687 an error is for matching codes to the decade. Turn them into a real error
3688 code, off the decade. */
3690 if (basic_errno == ERRNO_RCPT4XX)
3692 int code = (more_errno >> 8) & 255;
3694 more_errno = (more_errno & 0xffff00ff) | (21 << 8);
3695 else if (code > 100)
3696 more_errno = (more_errno & 0xffff00ff) | ((code - 96) << 8);
3700 yield = retry_find_config(s1, s2, basic_errno, more_errno);
3701 if (yield == NULL) printf("No retry information found\n"); else
3704 more_errno = yield->more_errno;
3705 printf("Retry rule: %s ", yield->pattern);
3707 if (yield->basic_errno == ERRNO_EXIMQUOTA)
3709 printf("quota%s%s ",
3710 (more_errno > 0)? "_" : "",
3711 (more_errno > 0)? readconf_printtime(more_errno) : US"");
3713 else if (yield->basic_errno == ECONNREFUSED)
3715 printf("refused%s%s ",
3716 (more_errno > 0)? "_" : "",
3717 (more_errno == 'M')? "MX" :
3718 (more_errno == 'A')? "A" : "");
3720 else if (yield->basic_errno == ETIMEDOUT)
3723 if ((more_errno & RTEF_CTOUT) != 0) printf("_connect");
3725 if (more_errno != 0) printf("_%s",
3726 (more_errno == 'M')? "MX" : "A");
3729 else if (yield->basic_errno == ERRNO_AUTHFAIL)
3730 printf("auth_failed ");
3733 for (r = yield->rules; r != NULL; r = r->next)
3735 printf("%c,%s", r->rule, readconf_printtime(r->timeout)); /* Do not */
3736 printf(",%s", readconf_printtime(r->p1)); /* amalgamate */
3742 printf(",%d.", x/1000);
3756 exim_exit(EXIT_SUCCESS);
3759 /* Handle a request to list one or more configuration options */
3763 set_process_info("listing variables");
3764 if (recipients_arg >= argc) readconf_print(US"all", NULL);
3765 else for (i = recipients_arg; i < argc; i++)
3768 (Ustrcmp(argv[i], "router") == 0 ||
3769 Ustrcmp(argv[i], "transport") == 0 ||
3770 Ustrcmp(argv[i], "authenticator") == 0))
3772 readconf_print(argv[i+1], argv[i]);
3775 else readconf_print(argv[i], NULL);
3777 exim_exit(EXIT_SUCCESS);
3781 /* Handle a request to deliver one or more messages that are already on the
3782 queue. Values of msg_action other than MSG_DELIVER are dealt with above. This
3783 is typically used for a small number when prodding by hand (when the option
3784 forced_delivery will be set) or when re-execing to regain root privilege.
3785 Each message delivery must happen in a separate process, so we fork a process
3786 for each one, and run them sequentially so that debugging output doesn't get
3787 intertwined, and to avoid spawning too many processes if a long list is given.
3788 However, don't fork for the last one; this saves a process in the common case
3789 when Exim is called to deliver just one message. */
3791 if (msg_action_arg > 0)
3793 if (prod_requires_admin && !admin_user)
3795 fprintf(stderr, "exim: Permission denied\n");
3796 exim_exit(EXIT_FAILURE);
3798 set_process_info("delivering specified messages");
3799 if (deliver_give_up) forced_delivery = deliver_force_thaw = TRUE;
3800 for (i = msg_action_arg; i < argc; i++)
3805 (void)deliver_message(argv[i], forced_delivery, deliver_give_up);
3806 else if ((pid = fork()) == 0)
3808 (void)deliver_message(argv[i], forced_delivery, deliver_give_up);
3809 _exit(EXIT_SUCCESS);
3813 fprintf(stderr, "failed to fork delivery process for %s: %s\n", argv[i],
3815 exim_exit(EXIT_FAILURE);
3819 exim_exit(EXIT_SUCCESS);
3823 /* If only a single queue run is requested, without SMTP listening, we can just
3824 turn into a queue runner, with an optional starting message id. */
3826 if (queue_interval == 0 && !daemon_listen)
3828 DEBUG(D_queue_run) debug_printf("Single queue run%s%s%s%s\n",
3829 (start_queue_run_id == NULL)? US"" : US" starting at ",
3830 (start_queue_run_id == NULL)? US"" : start_queue_run_id,
3831 (stop_queue_run_id == NULL)? US"" : US" stopping at ",
3832 (stop_queue_run_id == NULL)? US"" : stop_queue_run_id);
3833 set_process_info("running the queue (single queue run)");
3834 queue_run(start_queue_run_id, stop_queue_run_id, FALSE);
3835 exim_exit(EXIT_SUCCESS);
3839 /* Find the login name of the real user running this process. This is always
3840 needed when receiving a message, because it is written into the spool file. It
3841 may also be used to construct a from: or a sender: header, and in this case we
3842 need the user's full name as well, so save a copy of it, checked for RFC822
3843 syntax and munged if necessary, if it hasn't previously been set by the -F
3844 argument. We may try to get the passwd entry more than once, in case NIS or
3845 other delays are in evidence. Save the home directory for use in filter testing
3850 if ((pw = getpwuid(real_uid)) != NULL)
3852 originator_login = string_copy(US pw->pw_name);
3853 originator_home = string_copy(US pw->pw_dir);
3855 /* If user name has not been set by -F, set it from the passwd entry
3856 unless -f has been used to set the sender address by a trusted user. */
3858 if (originator_name == NULL)
3860 if (sender_address == NULL ||
3861 (!trusted_caller && filter_test == FTEST_NONE))
3863 uschar *name = US pw->pw_gecos;
3864 uschar *amp = Ustrchr(name, '&');
3867 /* Most Unix specify that a '&' character in the gecos field is
3868 replaced by a copy of the login name, and some even specify that
3869 the first character should be upper cased, so that's what we do. */
3874 string_format(buffer, sizeof(buffer), "%.*s%n%s%s",
3875 amp - name, name, &loffset, originator_login, amp + 1);
3876 buffer[loffset] = toupper(buffer[loffset]);
3880 /* If a pattern for matching the gecos field was supplied, apply
3881 it and then expand the name string. */
3883 if (gecos_pattern != NULL && gecos_name != NULL)
3886 re = regex_must_compile(gecos_pattern, FALSE, TRUE); /* Use malloc */
3888 if (regex_match_and_setup(re, name, 0, -1))
3890 uschar *new_name = expand_string(gecos_name);
3892 if (new_name != NULL)
3894 DEBUG(D_receive) debug_printf("user name \"%s\" extracted from "
3895 "gecos field \"%s\"\n", new_name, name);
3898 else DEBUG(D_receive) debug_printf("failed to expand gecos_name string "
3899 "\"%s\": %s\n", gecos_name, expand_string_message);
3901 else DEBUG(D_receive) debug_printf("gecos_pattern \"%s\" did not match "
3902 "gecos field \"%s\"\n", gecos_pattern, name);
3903 store_free((void *)re);
3905 originator_name = string_copy(name);
3908 /* A trusted caller has used -f but not -F */
3910 else originator_name = US"";
3913 /* Break the retry loop */
3918 if (++i > finduser_retries) break;
3922 /* If we cannot get a user login, log the incident and give up, unless the
3923 configuration specifies something to use. When running in the test harness,
3924 any setting of unknown_login overrides the actual name. */
3926 if (originator_login == NULL || running_in_test_harness)
3928 if (unknown_login != NULL)
3930 originator_login = expand_string(unknown_login);
3931 if (originator_name == NULL && unknown_username != NULL)
3932 originator_name = expand_string(unknown_username);
3933 if (originator_name == NULL) originator_name = US"";
3935 if (originator_login == NULL)
3936 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Failed to get user name for uid %d",
3940 /* Ensure that the user name is in a suitable form for use as a "phrase" in an
3943 originator_name = string_copy(parse_fix_phrase(originator_name,
3944 Ustrlen(originator_name), big_buffer, big_buffer_size));
3946 /* If a message is created by this call of Exim, the uid/gid of its originator
3947 are those of the caller. These values are overridden if an existing message is
3948 read in from the spool. */
3950 originator_uid = real_uid;
3951 originator_gid = real_gid;
3953 DEBUG(D_receive) debug_printf("originator: uid=%d gid=%d login=%s name=%s\n",
3954 (int)originator_uid, (int)originator_gid, originator_login, originator_name);
3956 /* Run in daemon and/or queue-running mode. The function daemon_go() never
3957 returns. We leave this till here so that the originator_ fields are available
3958 for incoming messages via the daemon. The daemon cannot be run in mua_wrapper
3961 if (daemon_listen || queue_interval > 0)
3965 fprintf(stderr, "Daemon cannot be run when mua_wrapper is set\n");
3966 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Daemon cannot be run when "
3967 "mua_wrapper is set");
3972 /* If the sender ident has not been set (by a trusted caller) set it to
3973 the caller. This will get overwritten below for an inetd call. If a trusted
3974 caller has set it empty, unset it. */
3976 if (sender_ident == NULL) sender_ident = originator_login;
3977 else if (sender_ident[0] == 0) sender_ident = NULL;
3979 /* Handle the -brw option, which is for checking out rewriting rules. Cause log
3980 writes (on errors) to go to stderr instead. Can't do this earlier, as want the
3981 originator_* variables set. */
3983 if (test_rewrite_arg >= 0)
3985 really_exim = FALSE;
3986 if (test_rewrite_arg >= argc)
3988 printf("-brw needs an address argument\n");
3989 exim_exit(EXIT_FAILURE);
3991 rewrite_test(argv[test_rewrite_arg]);
3992 exim_exit(EXIT_SUCCESS);
3995 /* A locally-supplied message is considered to be coming from a local user
3996 unless a trusted caller supplies a sender address with -f, or is passing in the
3997 message via SMTP (inetd invocation or otherwise). */
3999 if ((sender_address == NULL && !smtp_input) ||
4000 (!trusted_caller && filter_test == FTEST_NONE))
4002 sender_local = TRUE;
4004 /* A trusted caller can supply authenticated_sender and authenticated_id
4005 via -oMas and -oMai and if so, they will already be set. */
4007 if (authenticated_sender == NULL)
4008 authenticated_sender = string_sprintf("%s@%s", originator_login,
4009 qualify_domain_sender);
4010 if (authenticated_id == NULL) authenticated_id = originator_login;
4013 /* Trusted callers are always permitted to specify the sender address.
4014 Untrusted callers may specify it if it matches untrusted_set_sender, or if what
4015 is specified is the empty address. However, if a trusted caller does not
4016 specify a sender address for SMTP input, we leave sender_address unset. This
4017 causes the MAIL commands to be honoured. */
4019 if ((!smtp_input && sender_address == NULL) ||
4020 !receive_check_set_sender(sender_address))
4022 /* Either the caller is not permitted to set a general sender, or this is
4023 non-SMTP input and the trusted caller has not set a sender. If there is no
4024 sender, or if a sender other than <> is set, override with the originator's
4025 login (which will get qualified below), except when checking things. */
4027 if (sender_address == NULL /* No sender_address set */
4029 (sender_address[0] != 0 && /* Non-empty sender address, AND */
4030 !checking && /* Not running tests, AND */
4031 filter_test == FTEST_NONE)) /* Not testing a filter */
4033 sender_address = originator_login;
4034 sender_address_forced = FALSE;
4035 sender_address_domain = 0;
4039 /* Remember whether an untrusted caller set the sender address */
4041 sender_set_untrusted = sender_address != originator_login && !trusted_caller;
4043 /* Ensure that the sender address is fully qualified unless it is the empty
4044 address, which indicates an error message, or doesn't exist (root caller, smtp
4045 interface, no -f argument). */
4047 if (sender_address != NULL && sender_address[0] != 0 &&
4048 sender_address_domain == 0)
4049 sender_address = string_sprintf("%s@%s", local_part_quote(sender_address),
4050 qualify_domain_sender);
4052 DEBUG(D_receive) debug_printf("sender address = %s\n", sender_address);
4054 /* Handle a request to verify a list of addresses, or test them for delivery.
4055 This must follow the setting of the sender address, since routers can be
4056 predicated upon the sender. If no arguments are given, read addresses from
4057 stdin. Set debug_level to at least D_v to get full output for address testing.
4060 if (verify_address_mode || address_test_mode)
4063 int flags = vopt_qualify;
4065 if (verify_address_mode)
4067 if (!verify_as_sender) flags |= vopt_is_recipient;
4068 DEBUG(D_verify) debug_print_ids(US"Verifying:");
4073 flags |= vopt_is_recipient;
4074 debug_selector |= D_v;
4075 debug_file = stderr;
4076 debug_fd = fileno(debug_file);
4077 DEBUG(D_verify) debug_print_ids(US"Address testing:");
4080 if (recipients_arg < argc)
4082 while (recipients_arg < argc)
4084 uschar *s = argv[recipients_arg++];
4087 BOOL finished = FALSE;
4088 uschar *ss = parse_find_address_end(s, FALSE);
4089 if (*ss == ',') *ss = 0; else finished = TRUE;
4090 test_address(s, flags, &exit_value);
4093 while (*(++s) != 0 && (*s == ',' || isspace(*s)));
4100 uschar *s = get_stdinput(NULL, NULL);
4101 if (s == NULL) break;
4102 test_address(s, flags, &exit_value);
4106 exim_exit(exit_value);
4109 /* Handle expansion checking */
4113 if (recipients_arg < argc)
4115 while (recipients_arg < argc)
4117 uschar *s = argv[recipients_arg++];
4118 uschar *ss = expand_string(s);
4120 printf ("Failed: %s\n", expand_string_message);
4121 else printf("%s\n", CS ss);
4129 char *(*fn_readline)(char *) = NULL;
4130 char *(*fn_addhist)(char *) = NULL;
4133 void *dlhandle = set_readline(&fn_readline, &fn_addhist);
4139 uschar *source = get_stdinput(fn_readline, fn_addhist);
4140 if (source == NULL) break;
4141 ss = expand_string(source);
4143 printf ("Failed: %s\n", expand_string_message);
4144 else printf("%s\n", CS ss);
4148 if (dlhandle != NULL) dlclose(dlhandle);
4152 exim_exit(EXIT_SUCCESS);
4156 /* The active host name is normally the primary host name, but it can be varied
4157 for hosts that want to play several parts at once. We need to ensure that it is
4158 set for host checking, and for receiving messages. */
4160 smtp_active_hostname = primary_hostname;
4161 if (raw_active_hostname != NULL)
4163 uschar *nah = expand_string(raw_active_hostname);
4166 if (!expand_string_forcedfail)
4167 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to expand \"%s\" "
4168 "(smtp_active_hostname): %s", raw_active_hostname,
4169 expand_string_message);
4171 else if (nah[0] != 0) smtp_active_hostname = nah;
4174 /* Handle host checking: this facility mocks up an incoming SMTP call from a
4175 given IP address so that the blocking and relay configuration can be tested. An
4176 RFC 1413 call is made only if we are running in the test harness and an
4177 incoming interface and both ports are specified, because there is no TCP/IP
4178 call to find the ident for. */
4185 sender_ident = NULL;
4186 if (running_in_test_harness && sender_host_port != 0 &&
4187 interface_address != NULL && interface_port != 0)
4188 verify_get_ident(1413);
4190 /* In case the given address is a non-canonical IPv6 address, canonicize
4191 it. The code works for both IPv4 and IPv6, as it happens. */
4193 size = host_aton(sender_host_address, x);
4194 sender_host_address = store_get(48); /* large enough for full IPv6 */
4195 (void)host_nmtoa(size, x, -1, sender_host_address, ':');
4197 /* Now set up for testing */
4199 host_build_sender_fullhost();
4203 sender_local = FALSE;
4204 sender_host_notsocket = TRUE;
4205 debug_file = stderr;
4206 debug_fd = fileno(debug_file);
4207 fprintf(stdout, "\n**** SMTP testing session as if from host %s\n"
4208 "**** but without any ident (RFC 1413) callback.\n"
4209 "**** This is not for real!\n\n",
4210 sender_host_address);
4212 if (verify_check_host(&hosts_connection_nolog) == OK)
4213 log_write_selector &= ~L_smtp_connection;
4214 log_write(L_smtp_connection, LOG_MAIN, "%s", smtp_get_connection_info());
4216 if (smtp_start_session())
4218 reset_point = store_get(0);
4221 store_reset(reset_point);
4222 if (smtp_setup_msg() <= 0) break;
4223 if (!receive_msg(FALSE)) break;
4226 exim_exit(EXIT_SUCCESS);
4230 /* Arrange for message reception if recipients or SMTP were specified;
4231 otherwise complain unless a version print (-bV) happened or this is a filter
4232 verification test. In the former case, show the configuration file name. */
4234 if (recipients_arg >= argc && !extract_recipients && !smtp_input)
4236 if (version_printed)
4238 printf("Configuration file is %s\n", config_main_filename);
4239 return EXIT_SUCCESS;
4241 if (filter_test == FTEST_NONE)
4244 "Exim is a Mail Transfer Agent. It is normally called by Mail User Agents,\n"
4245 "not directly from a shell command line. Options and/or arguments control\n"
4246 "what it does when called. For a list of options, see the Exim documentation.\n");
4247 return EXIT_FAILURE;
4252 /* If mua_wrapper is set, Exim is being used to turn an MUA that submits on the
4253 standard input into an MUA that submits to a smarthost over TCP/IP. We know
4254 that we are not called from inetd, because that is rejected above. The
4255 following configuration settings are forced here:
4257 (1) Synchronous delivery (-odi)
4258 (2) Errors to stderr (-oep == -oeq)
4259 (3) No parallel remote delivery
4260 (4) Unprivileged delivery
4262 We don't force overall queueing options because there are several of them;
4263 instead, queueing is avoided below when mua_wrapper is set. However, we do need
4264 to override any SMTP queueing. */
4268 synchronous_delivery = TRUE;
4269 arg_error_handling = ERRORS_STDERR;
4270 remote_max_parallel = 1;
4271 deliver_drop_privilege = TRUE;
4273 queue_smtp_domains = NULL;
4277 /* Prepare to accept one or more new messages on the standard input. When a
4278 message has been read, its id is returned in message_id[]. If doing immediate
4279 delivery, we fork a delivery process for each received message, except for the
4280 last one, where we can save a process switch.
4282 It is only in non-smtp mode that error_handling is allowed to be changed from
4283 its default of ERRORS_SENDER by argument. (Idle thought: are any of the
4284 sendmail error modes other than -oem ever actually used? Later: yes.) */
4286 if (!smtp_input) error_handling = arg_error_handling;
4288 /* If this is an inetd call, ensure that stderr is closed to prevent panic
4289 logging being sent down the socket and make an identd call to get the
4294 (void)fclose(stderr);
4295 exim_nullstd(); /* Re-open to /dev/null */
4296 verify_get_ident(IDENT_PORT);
4297 host_build_sender_fullhost();
4298 set_process_info("handling incoming connection from %s via inetd",
4302 /* If the sender host address has been set, build sender_fullhost if it hasn't
4303 already been done (which it will have been for inetd). This caters for the
4304 case when it is forced by -oMa. However, we must flag that it isn't a socket,
4305 so that the test for IP options is skipped for -bs input. */
4307 if (sender_host_address != NULL && sender_fullhost == NULL)
4309 host_build_sender_fullhost();
4310 set_process_info("handling incoming connection from %s via -oMa",
4312 sender_host_notsocket = TRUE;
4315 /* Otherwise, set the sender host as unknown except for inetd calls. This
4316 prevents host checking in the case of -bs not from inetd and also for -bS. */
4318 else if (!is_inetd) sender_host_unknown = TRUE;
4320 /* If stdout does not exist, then dup stdin to stdout. This can happen
4321 if exim is started from inetd. In this case fd 0 will be set to the socket,
4322 but fd 1 will not be set. This also happens for passed SMTP channels. */
4324 if (fstat(1, &statbuf) < 0) (void)dup2(0, 1);
4326 /* Set up the incoming protocol name and the state of the program. Root
4327 is allowed to force received protocol via the -oMr option above, and if we are
4328 in a non-local SMTP state it means we have come via inetd and the process info
4329 has already been set up. We don't set received_protocol here for smtp input,
4330 as it varies according to batch/HELO/EHLO/AUTH/TLS. */
4334 if (sender_local) set_process_info("accepting a local SMTP message from <%s>",
4339 if (received_protocol == NULL)
4340 received_protocol = string_sprintf("local%s", called_as);
4341 set_process_info("accepting a local non-SMTP message from <%s>",
4345 /* Initialize the local_queue-only flag (this will be ignored if mua_wrapper is
4349 local_queue_only = queue_only;
4351 /* For non-SMTP and for batched SMTP input, check that there is enough space on
4352 the spool if so configured. On failure, we must not attempt to send an error
4353 message! (For interactive SMTP, the check happens at MAIL FROM and an SMTP
4354 error code is given.) */
4356 if ((!smtp_input || smtp_batched_input) && !receive_check_fs(0))
4358 fprintf(stderr, "exim: insufficient disk space\n");
4359 return EXIT_FAILURE;
4362 /* If this is smtp input of any kind, handle the start of the SMTP
4369 if (verify_check_host(&hosts_connection_nolog) == OK)
4370 log_write_selector &= ~L_smtp_connection;
4371 log_write(L_smtp_connection, LOG_MAIN, "%s", smtp_get_connection_info());
4372 if (!smtp_start_session())
4375 exim_exit(EXIT_SUCCESS);
4379 /* Otherwise, set up the input size limit here */
4383 thismessage_size_limit = expand_string_integer(message_size_limit);
4384 if (thismessage_size_limit < 0)
4386 if (thismessage_size_limit == -1)
4387 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to expand "
4388 "message_size_limit: %s", expand_string_message);
4390 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "invalid value for "
4391 "message_size_limit: %s", expand_string_message);
4395 /* Loop for several messages when reading SMTP input. If we fork any child
4396 processes, we don't want to wait for them unless synchronous delivery is
4397 requested, so set SIGCHLD to SIG_IGN in that case. This is not necessarily the
4398 same as SIG_DFL, despite the fact that documentation often lists the default as
4399 "ignore". This is a confusing area. This is what I know:
4401 At least on some systems (e.g. Solaris), just setting SIG_IGN causes child
4402 processes that complete simply to go away without ever becoming defunct. You
4403 can't then wait for them - but we don't want to wait for them in the
4404 non-synchronous delivery case. However, this behaviour of SIG_IGN doesn't
4405 happen for all OS (e.g. *BSD is different).
4407 But that's not the end of the story. Some (many? all?) systems have the
4408 SA_NOCLDWAIT option for sigaction(). This requests the behaviour that Solaris
4409 has by default, so it seems that the difference is merely one of default
4410 (compare restarting vs non-restarting signals).
4412 To cover all cases, Exim sets SIG_IGN with SA_NOCLDWAIT here if it can. If not,
4413 it just sets SIG_IGN. To be on the safe side it also calls waitpid() at the end
4414 of the loop below. Paranoia rules.
4416 February 2003: That's *still* not the end of the story. There are now versions
4417 of Linux (where SIG_IGN does work) that are picky. If, having set SIG_IGN, a
4418 process then calls waitpid(), a grumble is written to the system log, because
4419 this is logically inconsistent. In other words, it doesn't like the paranoia.
4420 As a consequenc of this, the waitpid() below is now excluded if we are sure
4421 that SIG_IGN works. */
4423 if (!synchronous_delivery)
4426 struct sigaction act;
4427 act.sa_handler = SIG_IGN;
4428 sigemptyset(&(act.sa_mask));
4429 act.sa_flags = SA_NOCLDWAIT;
4430 sigaction(SIGCHLD, &act, NULL);
4432 signal(SIGCHLD, SIG_IGN);
4436 /* Save the current store pool point, for resetting at the start of
4437 each message, and save the real sender address, if any. */
4439 reset_point = store_get(0);
4440 real_sender_address = sender_address;
4442 /* Loop to receive messages; receive_msg() returns TRUE if there are more
4443 messages to be read (SMTP input), or FALSE otherwise (not SMTP, or SMTP channel
4448 store_reset(reset_point);
4451 /* In the SMTP case, we have to handle the initial SMTP input and build the
4452 recipients list, before calling receive_msg() to read the message proper.
4453 Whatever sender address is actually given in the SMTP transaction is
4454 actually ignored for local senders - we use the actual sender, which is
4455 normally either the underlying user running this process or a -f argument
4456 provided by a trusted caller. It is saved in real_sender_address.
4458 However, if this value is NULL, we are dealing with a trusted caller when
4459 -f was not used; in this case, the SMTP sender is allowed to stand.
4461 Also, if untrusted_set_sender is set, we permit sender addresses that match
4462 anything in its list.
4464 The variable raw_sender_address holds the sender address before rewriting. */
4469 if ((rc = smtp_setup_msg()) > 0)
4471 if (real_sender_address != NULL &&
4472 !receive_check_set_sender(sender_address))
4474 sender_address = raw_sender = real_sender_address;
4475 sender_address_unrewritten = NULL;
4477 more = receive_msg(extract_recipients);
4478 if (message_id[0] == 0)
4481 exim_exit(EXIT_FAILURE);
4484 else exim_exit((rc == 0)? EXIT_SUCCESS : EXIT_FAILURE);
4487 /* In the non-SMTP case, we have all the information from the command
4488 line, but must process it in case it is in the more general RFC822
4489 format, and in any case, to detect syntax errors. Also, it appears that
4490 the use of comma-separated lists as single arguments is common, so we
4491 had better support them. */
4497 int count = argc - recipients_arg;
4498 uschar **list = argv + recipients_arg;
4500 /* These options cannot be changed dynamically for non-SMTP messages */
4502 active_local_sender_retain = local_sender_retain;
4503 active_local_from_check = local_from_check;
4505 /* Save before any rewriting */
4507 raw_sender = string_copy(sender_address);
4509 /* Loop for each argument */
4511 for (i = 0; i < count; i++)
4513 int start, end, domain;
4515 uschar *s = list[i];
4517 /* Loop for each comma-separated address */
4521 BOOL finished = FALSE;
4523 uschar *ss = parse_find_address_end(s, FALSE);
4525 if (*ss == ',') *ss = 0; else finished = TRUE;
4527 /* Check max recipients - if -t was used, these aren't recipients */
4529 if (recipients_max > 0 && ++rcount > recipients_max &&
4530 !extract_recipients)
4532 if (error_handling == ERRORS_STDERR)
4534 fprintf(stderr, "exim: too many recipients\n");
4535 exim_exit(EXIT_FAILURE);
4540 moan_to_sender(ERRMESS_TOOMANYRECIP, NULL, NULL, stdin, TRUE)?
4541 errors_sender_rc : EXIT_FAILURE;
4546 parse_extract_address(s, &errmess, &start, &end, &domain, FALSE);
4548 if (domain == 0 && !allow_unqualified_recipient)
4551 errmess = US"unqualified recipient address not allowed";
4554 if (recipient == NULL)
4556 if (error_handling == ERRORS_STDERR)
4558 fprintf(stderr, "exim: bad recipient address \"%s\": %s\n",
4559 string_printing(list[i]), errmess);
4560 exim_exit(EXIT_FAILURE);
4566 eblock.text1 = string_printing(list[i]);
4567 eblock.text2 = errmess;
4569 moan_to_sender(ERRMESS_BADARGADDRESS, &eblock, NULL, stdin, TRUE)?
4570 errors_sender_rc : EXIT_FAILURE;
4574 receive_add_recipient(recipient, -1);
4577 while (*(++s) != 0 && (*s == ',' || isspace(*s)));
4581 /* Show the recipients when debugging */
4586 if (sender_address != NULL) debug_printf("Sender: %s\n", sender_address);
4587 if (recipients_list != NULL)
4589 debug_printf("Recipients:\n");
4590 for (i = 0; i < recipients_count; i++)
4591 debug_printf(" %s\n", recipients_list[i].address);
4595 /* Read the data for the message. If filter_test is not FTEST_NONE, this
4596 will just read the headers for the message, and not write anything onto the
4599 message_ended = END_NOTENDED;
4600 more = receive_msg(extract_recipients);
4602 /* more is always FALSE here (not SMTP message) when reading a message
4603 for real; when reading the headers of a message for filter testing,
4604 it is TRUE if the headers were terminated by '.' and FALSE otherwise. */
4606 if (message_id[0] == 0) exim_exit(EXIT_FAILURE);
4607 } /* Non-SMTP message reception */
4609 /* If this is a filter testing run, there are headers in store, but
4610 no message on the spool. Run the filtering code in testing mode, setting
4611 the domain to the qualify domain and the local part to the current user,
4612 unless they have been set by options. The prefix and suffix are left unset
4613 unless specified. The the return path is set to to the sender unless it has
4614 already been set from a return-path header in the message. */
4616 if (filter_test != FTEST_NONE)
4618 deliver_domain = (ftest_domain != NULL)?
4619 ftest_domain : qualify_domain_recipient;
4620 deliver_domain_orig = deliver_domain;
4621 deliver_localpart = (ftest_localpart != NULL)?
4622 ftest_localpart : originator_login;
4623 deliver_localpart_orig = deliver_localpart;
4624 deliver_localpart_prefix = ftest_prefix;
4625 deliver_localpart_suffix = ftest_suffix;
4626 deliver_home = originator_home;
4628 if (return_path == NULL)
4630 printf("Return-path copied from sender\n");
4631 return_path = string_copy(sender_address);
4635 printf("Return-path = %s\n", (return_path[0] == 0)? US"<>" : return_path);
4637 printf("Sender = %s\n", (sender_address[0] == 0)? US"<>" : sender_address);
4639 receive_add_recipient(
4640 string_sprintf("%s%s%s@%s",
4641 (ftest_prefix == NULL)? US"" : ftest_prefix,
4643 (ftest_suffix == NULL)? US"" : ftest_suffix,
4644 deliver_domain), -1);
4646 printf("Recipient = %s\n", recipients_list[0].address);
4647 if (ftest_prefix != NULL) printf("Prefix = %s\n", ftest_prefix);
4648 if (ftest_suffix != NULL) printf("Suffix = %s\n", ftest_suffix);
4650 (void)chdir("/"); /* Get away from wherever the user is running this from */
4652 /* Now we run either a system filter test, or a user filter test, or both.
4653 In the latter case, headers added by the system filter will persist and be
4654 available to the user filter. We need to copy the filter variables
4657 if ((filter_test & FTEST_SYSTEM) != 0)
4659 if (!filter_runtest(filter_sfd, filter_test_sfile, TRUE, more))
4660 exim_exit(EXIT_FAILURE);
4663 memcpy(filter_sn, filter_n, sizeof(filter_sn));
4665 if ((filter_test & FTEST_USER) != 0)
4667 if (!filter_runtest(filter_ufd, filter_test_ufile, FALSE, more))
4668 exim_exit(EXIT_FAILURE);
4671 exim_exit(EXIT_SUCCESS);
4674 /* Else act on the result of message reception. We should not get here unless
4675 message_id[0] is non-zero. If queue_only is set, local_queue_only will be
4676 TRUE. If it is not, check on the number of messages received in this
4677 connection. If that's OK and queue_only_load is set, check that the load
4678 average is below it. If it is not, set local_queue_only TRUE. Note that it
4679 then remains this way for any subsequent messages on the same SMTP connection.
4680 This is a deliberate choice; even though the load average may fall, it
4681 doesn't seem right to deliver later messages on the same call when not
4682 delivering earlier ones. */
4684 if (!local_queue_only)
4686 if (smtp_accept_queue_per_connection > 0 &&
4687 receive_messagecount > smtp_accept_queue_per_connection)
4689 local_queue_only = TRUE;
4690 queue_only_reason = 2;
4692 else if (queue_only_load >= 0)
4694 local_queue_only = (load_average = os_getloadavg()) > queue_only_load;
4695 if (local_queue_only) queue_only_reason = 3;
4699 /* If running as an MUA wrapper, all queueing options and freezing options
4703 local_queue_only = queue_only_policy = deliver_freeze = FALSE;
4705 /* Log the queueing here, when it will get a message id attached, but
4706 not if queue_only is set (case 0). Case 1 doesn't happen here (too many
4709 if (local_queue_only) switch(queue_only_reason)
4712 log_write(L_delay_delivery,
4713 LOG_MAIN, "no immediate delivery: more than %d messages "
4714 "received in one connection", smtp_accept_queue_per_connection);
4718 log_write(L_delay_delivery,
4719 LOG_MAIN, "no immediate delivery: load average %.2f",
4720 (double)load_average/1000.0);
4724 /* Else do the delivery unless the ACL or local_scan() called for queue only
4725 or froze the message. Always deliver in a separate process. A fork failure is
4726 not a disaster, as the delivery will eventually happen on a subsequent queue
4727 run. The search cache must be tidied before the fork, as the parent will
4728 do it before exiting. The child will trigger a lookup failure and
4729 thereby defer the delivery if it tries to use (for example) a cached ldap
4730 connection that the parent has called unbind on. */
4732 else if (!queue_only_policy && !deliver_freeze)
4737 if ((pid = fork()) == 0)
4740 close_unwanted(); /* Close unwanted file descriptors and TLS */
4741 exim_nullstd(); /* Ensure std{in,out,err} exist */
4743 /* Occasionally in the test harness we don't have synchronous delivery
4744 set (can happen with bounces). In that case, let the old process finish
4745 before continuing, to keep the debug output the same. */
4747 if (running_in_test_harness && !synchronous_delivery) millisleep(100);
4749 /* Re-exec Exim if we need to regain privilege (note: in mua_wrapper
4750 mode, deliver_drop_privilege is forced TRUE). */
4752 if (geteuid() != root_uid && !deliver_drop_privilege && !unprivileged)
4754 (void)child_exec_exim(CEE_EXEC_EXIT, FALSE, NULL, FALSE, 2, US"-Mc",
4756 /* Control does not return here. */
4759 /* No need to re-exec */
4761 rc = deliver_message(message_id, FALSE, FALSE);
4763 _exit((!mua_wrapper || rc == DELIVER_MUA_SUCCEEDED)?
4764 EXIT_SUCCESS : EXIT_FAILURE);
4769 log_write(0, LOG_MAIN|LOG_PANIC, "failed to fork automatic delivery "
4770 "process: %s", strerror(errno));
4773 /* In the parent, wait if synchronous delivery is required. This will
4774 always be the case in MUA wrapper mode. */
4776 else if (synchronous_delivery)
4779 while (wait(&status) != pid);
4780 if ((status & 0x00ff) != 0)
4781 log_write(0, LOG_MAIN|LOG_PANIC,
4782 "process %d crashed with signal %d while delivering %s",
4783 (int)pid, status & 0x00ff, message_id);
4784 if (mua_wrapper && (status & 0xffff) != 0) exim_exit(EXIT_FAILURE);
4788 /* The loop will repeat if more is TRUE. If we do not know know that the OS
4789 automatically reaps children (see comments above the loop), clear away any
4790 finished subprocesses here, in case there are lots of messages coming in
4791 from the same source. */
4793 #ifndef SIG_IGN_WORKS
4794 while (waitpid(-1, NULL, WNOHANG) > 0);
4798 exim_exit(EXIT_SUCCESS); /* Never returns */
4799 return 0; /* To stop compiler warning */