1 /*************************************************
2 * Exim - an Internet mail transport agent *
3 *************************************************/
5 /* Copyright (c) University of Cambridge 1995 - 2018 */
6 /* See the file NOTICE for conditions of use and distribution. */
9 /* The main function: entry point, initialization, and high-level control.
10 Also a few functions that don't naturally fit elsewhere. */
15 #if defined(__GLIBC__) && !defined(__UCLIBC__)
16 # include <gnu/libc-version.h>
20 # include <gnutls/gnutls.h>
21 # if GNUTLS_VERSION_NUMBER < 0x030103 && !defined(DISABLE_OCSP)
30 extern void init_lookup_list(void);
34 /*************************************************
35 * Function interface to store functions *
36 *************************************************/
38 /* We need some real functions to pass to the PCRE regular expression library
39 for store allocation via Exim's store manager. The normal calls are actually
40 macros that pass over location information to make tracing easier. These
41 functions just interface to the standard macro calls. A good compiler will
42 optimize out the tail recursion and so not make them too expensive. There
43 are two sets of functions; one for use when we want to retain the compiled
44 regular expression for a long time; the other for short-term use. */
47 function_store_get(size_t size)
49 /* For now, regard all RE results as potentially tainted. We might need
50 more intelligence on this point. */
51 return store_get((int)size, TRUE);
55 function_dummy_free(void *block) { block = block; }
58 function_store_malloc(size_t size)
60 return store_malloc((int)size);
64 function_store_free(void *block)
72 /*************************************************
73 * Enums for cmdline interface *
74 *************************************************/
76 enum commandline_info { CMDINFO_NONE=0,
77 CMDINFO_HELP, CMDINFO_SIEVE, CMDINFO_DSCP };
82 /*************************************************
83 * Compile regular expression and panic on fail *
84 *************************************************/
86 /* This function is called when failure to compile a regular expression leads
87 to a panic exit. In other cases, pcre_compile() is called directly. In many
88 cases where this function is used, the results of the compilation are to be
89 placed in long-lived store, so we temporarily reset the store management
90 functions that PCRE uses if the use_malloc flag is set.
93 pattern the pattern to compile
94 caseless TRUE if caseless matching is required
95 use_malloc TRUE if compile into malloc store
97 Returns: pointer to the compiled pattern
101 regex_must_compile(const uschar *pattern, BOOL caseless, BOOL use_malloc)
104 int options = PCRE_COPT;
109 pcre_malloc = function_store_malloc;
110 pcre_free = function_store_free;
112 if (caseless) options |= PCRE_CASELESS;
113 yield = pcre_compile(CCS pattern, options, CCSS &error, &offset, NULL);
114 pcre_malloc = function_store_get;
115 pcre_free = function_dummy_free;
117 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "regular expression error: "
118 "%s at offset %d while compiling %s", error, offset, pattern);
125 /*************************************************
126 * Execute regular expression and set strings *
127 *************************************************/
129 /* This function runs a regular expression match, and sets up the pointers to
130 the matched substrings.
133 re the compiled expression
134 subject the subject string
135 options additional PCRE options
136 setup if < 0 do full setup
137 if >= 0 setup from setup+1 onwards,
138 excluding the full matched string
140 Returns: TRUE or FALSE
144 regex_match_and_setup(const pcre *re, const uschar *subject, int options, int setup)
146 int ovector[3*(EXPAND_MAXN+1)];
147 uschar * s = string_copy(subject); /* de-constifying */
148 int n = pcre_exec(re, NULL, CS s, Ustrlen(s), 0,
149 PCRE_EOPT | options, ovector, nelem(ovector));
151 if (n == 0) n = EXPAND_MAXN + 1;
154 expand_nmax = setup < 0 ? 0 : setup + 1;
155 for (int nn = setup < 0 ? 0 : 2; nn < n*2; nn += 2)
157 expand_nstring[expand_nmax] = s + ovector[nn];
158 expand_nlength[expand_nmax++] = ovector[nn+1] - ovector[nn];
168 /*************************************************
169 * Set up processing details *
170 *************************************************/
172 /* Save a text string for dumping when SIGUSR1 is received.
173 Do checks for overruns.
175 Arguments: format and arguments, as for printf()
180 set_process_info(const char *format, ...)
182 gstring gs = { .size = PROCESS_INFO_SIZE - 2, .ptr = 0, .s = process_info };
187 g = string_fmt_append(&gs, "%5d ", (int)getpid());
189 va_start(ap, format);
190 if (!string_vformat(g, 0, format, ap))
193 g = string_cat(&gs, US"**** string overflowed buffer ****");
195 g = string_catn(g, US"\n", 1);
196 string_from_gstring(g);
197 process_info_len = g->ptr;
198 DEBUG(D_process_info) debug_printf("set_process_info: %s", process_info);
202 /***********************************************
203 * Handler for SIGTERM *
204 ***********************************************/
207 term_handler(int sig)
213 /*************************************************
214 * Handler for SIGUSR1 *
215 *************************************************/
217 /* SIGUSR1 causes any exim process to write to the process log details of
218 what it is currently doing. It will only be used if the OS is capable of
219 setting up a handler that causes automatic restarting of any system call
220 that is in progress at the time.
222 This function takes care to be signal-safe.
224 Argument: the signal number (SIGUSR1)
229 usr1_handler(int sig)
233 os_restarting_signal(sig, usr1_handler);
235 if ((fd = Uopen(process_log_path, O_APPEND|O_WRONLY, LOG_MODE)) < 0)
237 /* If we are already running as the Exim user, try to create it in the
238 current process (assuming spool_directory exists). Otherwise, if we are
239 root, do the creation in an exim:exim subprocess. */
241 int euid = geteuid();
242 if (euid == exim_uid)
243 fd = Uopen(process_log_path, O_CREAT|O_APPEND|O_WRONLY, LOG_MODE);
244 else if (euid == root_uid)
245 fd = log_create_as_exim(process_log_path);
248 /* If we are neither exim nor root, or if we failed to create the log file,
249 give up. There is not much useful we can do with errors, since we don't want
250 to disrupt whatever is going on outside the signal handler. */
254 (void)write(fd, process_info, process_info_len);
260 /*************************************************
262 *************************************************/
264 /* This handler is enabled most of the time that Exim is running. The handler
265 doesn't actually get used unless alarm() has been called to set a timer, to
266 place a time limit on a system call of some kind. When the handler is run, it
269 There are some other SIGALRM handlers that are used in special cases when more
270 than just a flag setting is required; for example, when reading a message's
271 input. These are normally set up in the code module that uses them, and the
272 SIGALRM handler is reset to this one afterwards.
274 Argument: the signal value (SIGALRM)
279 sigalrm_handler(int sig)
281 sig = sig; /* Keep picky compilers happy */
283 os_non_restarting_signal(SIGALRM, sigalrm_handler);
288 /*************************************************
289 * Sleep for a fractional time interval *
290 *************************************************/
292 /* This function is called by millisleep() and exim_wait_tick() to wait for a
293 period of time that may include a fraction of a second. The coding is somewhat
294 tedious. We do not expect setitimer() ever to fail, but if it does, the process
295 will wait for ever, so we panic in this instance. (There was a case of this
296 when a bug in a function that calls milliwait() caused it to pass invalid data.
297 That's when I added the check. :-)
299 We assume it to be not worth sleeping for under 50us; this value will
300 require revisiting as hardware advances. This avoids the issue of
301 a zero-valued timer setting meaning "never fire".
303 Argument: an itimerval structure containing the interval
308 milliwait(struct itimerval *itval)
311 sigset_t old_sigmask;
312 int save_errno = errno;
314 if (itval->it_value.tv_usec < 50 && itval->it_value.tv_sec == 0)
316 (void)sigemptyset(&sigmask); /* Empty mask */
317 (void)sigaddset(&sigmask, SIGALRM); /* Add SIGALRM */
318 (void)sigprocmask(SIG_BLOCK, &sigmask, &old_sigmask); /* Block SIGALRM */
319 if (setitimer(ITIMER_REAL, itval, NULL) < 0) /* Start timer */
320 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
321 "setitimer() failed: %s", strerror(errno));
322 (void)sigfillset(&sigmask); /* All signals */
323 (void)sigdelset(&sigmask, SIGALRM); /* Remove SIGALRM */
324 (void)sigsuspend(&sigmask); /* Until SIGALRM */
325 (void)sigprocmask(SIG_SETMASK, &old_sigmask, NULL); /* Restore mask */
327 sigalrm_seen = FALSE;
333 /*************************************************
334 * Millisecond sleep function *
335 *************************************************/
337 /* The basic sleep() function has a granularity of 1 second, which is too rough
338 in some cases - for example, when using an increasing delay to slow down
341 Argument: number of millseconds
348 struct itimerval itval = {.it_interval = {.tv_sec = 0, .tv_usec = 0},
349 .it_value = {.tv_sec = msec/1000,
350 .tv_usec = (msec % 1000) * 1000}};
356 /*************************************************
357 * Compare microsecond times *
358 *************************************************/
365 Returns: -1, 0, or +1
369 exim_tvcmp(struct timeval *t1, struct timeval *t2)
371 if (t1->tv_sec > t2->tv_sec) return +1;
372 if (t1->tv_sec < t2->tv_sec) return -1;
373 if (t1->tv_usec > t2->tv_usec) return +1;
374 if (t1->tv_usec < t2->tv_usec) return -1;
381 /*************************************************
382 * Clock tick wait function *
383 *************************************************/
385 #ifdef _POSIX_MONOTONIC_CLOCK
386 /* Amount CLOCK_MONOTONIC is behind realtime, at startup. */
387 static struct timespec offset_ts;
390 exim_clock_init(void)
393 if (clock_gettime(CLOCK_MONOTONIC, &offset_ts) != 0) return;
394 (void)gettimeofday(&tv, NULL);
395 offset_ts.tv_sec = tv.tv_sec - offset_ts.tv_sec;
396 offset_ts.tv_nsec = tv.tv_usec * 1000 - offset_ts.tv_nsec;
397 if (offset_ts.tv_nsec >= 0) return;
399 offset_ts.tv_nsec += 1000*1000*1000;
404 /* Exim uses a time + a pid to generate a unique identifier in two places: its
405 message IDs, and in file names for maildir deliveries. Because some OS now
406 re-use pids within the same second, sub-second times are now being used.
407 However, for absolute certainty, we must ensure the clock has ticked before
408 allowing the relevant process to complete. At the time of implementation of
409 this code (February 2003), the speed of processors is such that the clock will
410 invariably have ticked already by the time a process has done its job. This
411 function prepares for the time when things are faster - and it also copes with
412 clocks that go backwards.
415 tgt_tv A timeval which was used to create uniqueness; its usec field
416 has been rounded down to the value of the resolution.
417 We want to be sure the current time is greater than this.
418 resolution The resolution that was used to divide the microseconds
419 (1 for maildir, larger for message ids)
425 exim_wait_tick(struct timeval * tgt_tv, int resolution)
427 struct timeval now_tv;
428 long int now_true_usec;
430 #ifdef _POSIX_MONOTONIC_CLOCK
431 struct timespec now_ts;
433 if (clock_gettime(CLOCK_MONOTONIC, &now_ts) == 0)
435 now_ts.tv_sec += offset_ts.tv_sec;
436 if ((now_ts.tv_nsec += offset_ts.tv_nsec) >= 1000*1000*1000)
439 now_ts.tv_nsec -= 1000*1000*1000;
441 now_tv.tv_sec = now_ts.tv_sec;
442 now_true_usec = (now_ts.tv_nsec / (resolution * 1000)) * resolution;
443 now_tv.tv_usec = now_true_usec;
448 (void)gettimeofday(&now_tv, NULL);
449 now_true_usec = now_tv.tv_usec;
450 now_tv.tv_usec = (now_true_usec/resolution) * resolution;
453 while (exim_tvcmp(&now_tv, tgt_tv) <= 0)
455 struct itimerval itval;
456 itval.it_interval.tv_sec = 0;
457 itval.it_interval.tv_usec = 0;
458 itval.it_value.tv_sec = tgt_tv->tv_sec - now_tv.tv_sec;
459 itval.it_value.tv_usec = tgt_tv->tv_usec + resolution - now_true_usec;
461 /* We know that, overall, "now" is less than or equal to "then". Therefore, a
462 negative value for the microseconds is possible only in the case when "now"
463 is more than a second less than "tgt". That means that itval.it_value.tv_sec
464 is greater than zero. The following correction is therefore safe. */
466 if (itval.it_value.tv_usec < 0)
468 itval.it_value.tv_usec += 1000000;
469 itval.it_value.tv_sec -= 1;
472 DEBUG(D_transport|D_receive)
474 if (!f.running_in_test_harness)
476 debug_printf("tick check: " TIME_T_FMT ".%06lu " TIME_T_FMT ".%06lu\n",
477 tgt_tv->tv_sec, (long) tgt_tv->tv_usec,
478 now_tv.tv_sec, (long) now_tv.tv_usec);
479 debug_printf("waiting " TIME_T_FMT ".%06lu sec\n",
480 itval.it_value.tv_sec, (long) itval.it_value.tv_usec);
486 /* Be prapared to go around if the kernel does not implement subtick
487 granularity (GNU Hurd) */
489 (void)gettimeofday(&now_tv, NULL);
490 now_true_usec = now_tv.tv_usec;
491 now_tv.tv_usec = (now_true_usec/resolution) * resolution;
498 /*************************************************
499 * Call fopen() with umask 777 and adjust mode *
500 *************************************************/
502 /* Exim runs with umask(0) so that files created with open() have the mode that
503 is specified in the open() call. However, there are some files, typically in
504 the spool directory, that are created with fopen(). They end up world-writeable
505 if no precautions are taken. Although the spool directory is not accessible to
506 the world, this is an untidiness. So this is a wrapper function for fopen()
507 that sorts out the mode of the created file.
510 filename the file name
511 options the fopen() options
512 mode the required mode
514 Returns: the fopened FILE or NULL
518 modefopen(const uschar *filename, const char *options, mode_t mode)
520 mode_t saved_umask = umask(0777);
521 FILE *f = Ufopen(filename, options);
522 (void)umask(saved_umask);
523 if (f != NULL) (void)fchmod(fileno(f), mode);
528 /*************************************************
529 * Ensure stdin, stdout, and stderr exist *
530 *************************************************/
532 /* Some operating systems grumble if an exec() happens without a standard
533 input, output, and error (fds 0, 1, 2) being defined. The worry is that some
534 file will be opened and will use these fd values, and then some other bit of
535 code will assume, for example, that it can write error messages to stderr.
536 This function ensures that fds 0, 1, and 2 are open if they do not already
537 exist, by connecting them to /dev/null.
539 This function is also used to ensure that std{in,out,err} exist at all times,
540 so that if any library that Exim calls tries to use them, it doesn't crash.
551 for (int i = 0; i <= 2; i++)
553 if (fstat(i, &statbuf) < 0 && errno == EBADF)
555 if (devnull < 0) devnull = open("/dev/null", O_RDWR);
556 if (devnull < 0) log_write(0, LOG_MAIN|LOG_PANIC_DIE, "%s",
557 string_open_failed(errno, "/dev/null", NULL));
558 if (devnull != i) (void)dup2(devnull, i);
561 if (devnull > 2) (void)close(devnull);
567 /*************************************************
568 * Close unwanted file descriptors for delivery *
569 *************************************************/
571 /* This function is called from a new process that has been forked to deliver
572 an incoming message, either directly, or using exec.
574 We want any smtp input streams to be closed in this new process. However, it
575 has been observed that using fclose() here causes trouble. When reading in -bS
576 input, duplicate copies of messages have been seen. The files will be sharing a
577 file pointer with the parent process, and it seems that fclose() (at least on
578 some systems - I saw this on Solaris 2.5.1) messes with that file pointer, at
579 least sometimes. Hence we go for closing the underlying file descriptors.
581 If TLS is active, we want to shut down the TLS library, but without molesting
582 the parent's SSL connection.
584 For delivery of a non-SMTP message, we want to close stdin and stdout (and
585 stderr unless debugging) because the calling process might have set them up as
586 pipes and be waiting for them to close before it waits for the submission
587 process to terminate. If they aren't closed, they hold up the calling process
588 until the initial delivery process finishes, which is not what we want.
590 Exception: We do want it for synchronous delivery!
592 And notwithstanding all the above, if D_resolver is set, implying resolver
593 debugging, leave stdout open, because that's where the resolver writes its
596 When we close stderr (which implies we've also closed stdout), we also get rid
597 of any controlling terminal.
609 tls_close(NULL, TLS_NO_SHUTDOWN); /* Shut down the TLS library */
611 (void)close(fileno(smtp_in));
612 (void)close(fileno(smtp_out));
617 (void)close(0); /* stdin */
618 if ((debug_selector & D_resolver) == 0) (void)close(1); /* stdout */
619 if (debug_selector == 0) /* stderr */
621 if (!f.synchronous_delivery)
634 /*************************************************
636 *************************************************/
638 /* This function sets a new uid and gid permanently, optionally calling
639 initgroups() to set auxiliary groups. There are some special cases when running
640 Exim in unprivileged modes. In these situations the effective uid will not be
641 root; if we already have the right effective uid/gid, and don't need to
642 initialize any groups, leave things as they are.
647 igflag TRUE if initgroups() wanted
648 msg text to use in debugging output and failure log
650 Returns: nothing; bombs out on failure
654 exim_setugid(uid_t uid, gid_t gid, BOOL igflag, uschar *msg)
656 uid_t euid = geteuid();
657 gid_t egid = getegid();
659 if (euid == root_uid || euid != uid || egid != gid || igflag)
661 /* At least one OS returns +1 for initgroups failure, so just check for
666 struct passwd *pw = getpwuid(uid);
668 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "cannot run initgroups(): "
669 "no passwd entry for uid=%ld", (long int)uid);
671 if (initgroups(pw->pw_name, gid) != 0)
672 log_write(0,LOG_MAIN|LOG_PANIC_DIE,"initgroups failed for uid=%ld: %s",
673 (long int)uid, strerror(errno));
676 if (setgid(gid) < 0 || setuid(uid) < 0)
677 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "unable to set gid=%ld or uid=%ld "
678 "(euid=%ld): %s", (long int)gid, (long int)uid, (long int)euid, msg);
681 /* Debugging output included uid/gid and all groups */
685 int group_count, save_errno;
686 gid_t group_list[EXIM_GROUPLIST_SIZE];
687 debug_printf("changed uid/gid: %s\n uid=%ld gid=%ld pid=%ld\n", msg,
688 (long int)geteuid(), (long int)getegid(), (long int)getpid());
689 group_count = getgroups(nelem(group_list), group_list);
691 debug_printf(" auxiliary group list:");
693 for (int i = 0; i < group_count; i++) debug_printf(" %d", (int)group_list[i]);
694 else if (group_count < 0)
695 debug_printf(" <error: %s>", strerror(save_errno));
696 else debug_printf(" <none>");
704 /*************************************************
706 *************************************************/
708 /* Exim exits via this function so that it always clears up any open
714 Returns: does not return
718 exim_exit(int rc, const uschar * process)
723 debug_printf(">>>>>>>>>>>>>>>> Exim pid=%d %s%s%sterminating with rc=%d "
724 ">>>>>>>>>>>>>>>>\n", (int)getpid(),
725 process ? "(" : "", process, process ? ") " : "", rc);
731 exim_underbar_exit(int rc, const uschar * process)
735 debug_printf(">>>>>>>>>>>>>>>> Exim pid=%d %s%s%sterminating with rc=%d "
736 ">>>>>>>>>>>>>>>>\n", (int)getpid(),
737 process ? "(" : "", process, process ? ") " : "", rc);
743 /* Print error string, then die */
745 exim_fail(const char * fmt, ...)
749 vfprintf(stderr, fmt, ap);
753 /* exim_chown_failure() called from exim_chown()/exim_fchown() on failure
754 of chown()/fchown(). See src/functions.h for more explanation */
756 exim_chown_failure(int fd, const uschar *name, uid_t owner, gid_t group)
758 int saved_errno = errno; /* from the preceeding chown call */
760 log_write(0, LOG_MAIN|LOG_PANIC,
761 __FILE__ ":%d: chown(%s, %d:%d) failed (%s)."
762 " Please contact the authors and refer to https://bugs.exim.org/show_bug.cgi?id=2391",
763 __LINE__, name?name:US"<unknown>", owner, group, strerror(errno));
765 /* I leave this here, commented, in case the "bug"(?) comes up again.
766 It is not an Exim bug, but we can provide a workaround.
772 if (0 == (fd < 0 ? stat(name, &buf) : fstat(fd, &buf)))
774 if (buf.st_uid == owner && buf.st_gid == group) return 0;
775 log_write(0, LOG_MAIN|LOG_PANIC, "Wrong ownership on %s", name);
777 else log_write(0, LOG_MAIN|LOG_PANIC, "Stat failed on %s: %s", name, strerror(errno));
785 /*************************************************
786 * Extract port from host address *
787 *************************************************/
789 /* Called to extract the port from the values given to -oMa and -oMi.
790 It also checks the syntax of the address, and terminates it before the
791 port data when a port is extracted.
794 address the address, with possible port on the end
796 Returns: the port, or zero if there isn't one
797 bombs out on a syntax error
801 check_port(uschar *address)
803 int port = host_address_extract_port(address);
804 if (string_is_ip_address(address, NULL) == 0)
805 exim_fail("exim abandoned: \"%s\" is not an IP address\n", address);
811 /*************************************************
812 * Test/verify an address *
813 *************************************************/
815 /* This function is called by the -bv and -bt code. It extracts a working
816 address from a full RFC 822 address. This isn't really necessary per se, but it
817 has the effect of collapsing source routes.
821 flags flag bits for verify_address()
822 exit_value to be set for failures
828 test_address(uschar *s, int flags, int *exit_value)
830 int start, end, domain;
831 uschar *parse_error = NULL;
832 uschar *address = parse_extract_address(s, &parse_error, &start, &end, &domain,
836 fprintf(stdout, "syntax error: %s\n", parse_error);
841 int rc = verify_address(deliver_make_addr(address,TRUE), stdout, flags, -1,
842 -1, -1, NULL, NULL, NULL);
843 if (rc == FAIL) *exit_value = 2;
844 else if (rc == DEFER && *exit_value == 0) *exit_value = 1;
850 /*************************************************
851 * Show supported features *
852 *************************************************/
855 show_db_version(FILE * f)
857 #ifdef DB_VERSION_STRING
860 fprintf(f, "Library version: BDB: Compile: %s\n", DB_VERSION_STRING);
861 fprintf(f, " Runtime: %s\n",
862 db_version(NULL, NULL, NULL));
865 fprintf(f, "Berkeley DB: %s\n", DB_VERSION_STRING);
867 #elif defined(BTREEVERSION) && defined(HASHVERSION)
869 fprintf(f, "Probably Berkeley DB version 1.8x (native mode)\n");
871 fprintf(f, "Probably Berkeley DB version 1.8x (compatibility mode)\n");
874 #elif defined(_DBM_RDONLY) || defined(dbm_dirfno)
875 fprintf(f, "Probably ndbm\n");
876 #elif defined(USE_TDB)
877 fprintf(f, "Using tdb\n");
880 fprintf(f, "Probably GDBM (native mode)\n");
882 fprintf(f, "Probably GDBM (compatibility mode)\n");
888 /* This function is called for -bV/--version and for -d to output the optional
889 features of the current Exim binary.
891 Arguments: a FILE for printing
896 show_whats_supported(FILE * fp)
898 DEBUG(D_any) {} else show_db_version(fp);
900 fprintf(fp, "Support for:");
901 #ifdef SUPPORT_CRYPTEQ
902 fprintf(fp, " crypteq");
905 fprintf(fp, " iconv()");
908 fprintf(fp, " IPv6");
910 #ifdef HAVE_SETCLASSRESOURCES
911 fprintf(fp, " use_setclassresources");
917 fprintf(fp, " Perl");
920 fprintf(fp, " Expand_dlfunc");
922 #ifdef USE_TCP_WRAPPERS
923 fprintf(fp, " TCPwrappers");
926 fprintf(fp, " GnuTLS");
929 fprintf(fp, " OpenSSL");
931 #ifdef SUPPORT_TRANSLATE_IP_ADDRESS
932 fprintf(fp, " translate_ip_address");
934 #ifdef SUPPORT_MOVE_FROZEN_MESSAGES
935 fprintf(fp, " move_frozen_messages");
937 #ifdef WITH_CONTENT_SCAN
938 fprintf(fp, " Content_Scanning");
941 fprintf(fp, " DANE");
944 fprintf(fp, " DKIM");
946 #ifndef DISABLE_DNSSEC
947 fprintf(fp, " DNSSEC");
949 #ifndef DISABLE_EVENT
950 fprintf(fp, " Event");
953 fprintf(fp, " I18N");
956 fprintf(fp, " OCSP");
958 #ifndef DISABLE_PIPE_CONNECT
959 fprintf(fp, " PIPE_CONNECT");
962 fprintf(fp, " PRDR");
965 fprintf(fp, " PROXY");
968 fprintf(fp, " SOCKS");
974 fprintf(fp, " DMARC");
978 if (f.tcp_fastopen_ok) fprintf(fp, " TCP_Fast_Open");
980 #ifdef EXPERIMENTAL_ARC
981 fprintf(fp, " Experimental_ARC");
983 #ifdef EXPERIMENTAL_BRIGHTMAIL
984 fprintf(fp, " Experimental_Brightmail");
986 #ifdef EXPERIMENTAL_DCC
987 fprintf(fp, " Experimental_DCC");
989 #ifdef EXPERIMENTAL_DSN_INFO
990 fprintf(fp, " Experimental_DSN_info");
992 #ifdef EXPERIMENTAL_LMDB
993 fprintf(fp, " Experimental_LMDB");
995 #ifdef EXPERIMENTAL_QUEUE_RAMP
996 fprintf(fp, " Experimental_Queue_Ramp");
998 #ifdef EXPERIMENTAL_QUEUEFILE
999 fprintf(fp, " Experimental_QUEUEFILE");
1001 #if defined(EXPERIMENTAL_SRS) || defined(EXPERIMENTAL_SRS_NATIVE)
1002 fprintf(fp, " Experimental_SRS");
1004 #ifdef EXPERIMENTAL_TLS_RESUME
1005 fprintf(fp, " Experimental_TLS_resume");
1009 fprintf(fp, "Lookups (built-in):");
1010 #if defined(LOOKUP_LSEARCH) && LOOKUP_LSEARCH!=2
1011 fprintf(fp, " lsearch wildlsearch nwildlsearch iplsearch");
1013 #if defined(LOOKUP_CDB) && LOOKUP_CDB!=2
1014 fprintf(fp, " cdb");
1016 #if defined(LOOKUP_DBM) && LOOKUP_DBM!=2
1017 fprintf(fp, " dbm dbmjz dbmnz");
1019 #if defined(LOOKUP_DNSDB) && LOOKUP_DNSDB!=2
1020 fprintf(fp, " dnsdb");
1022 #if defined(LOOKUP_DSEARCH) && LOOKUP_DSEARCH!=2
1023 fprintf(fp, " dsearch");
1025 #if defined(LOOKUP_IBASE) && LOOKUP_IBASE!=2
1026 fprintf(fp, " ibase");
1028 #if defined(LOOKUP_JSON) && LOOKUP_JSON!=2
1029 fprintf(fp, " json");
1031 #if defined(LOOKUP_LDAP) && LOOKUP_LDAP!=2
1032 fprintf(fp, " ldap ldapdn ldapm");
1034 #ifdef EXPERIMENTAL_LMDB
1035 fprintf(fp, " lmdb");
1037 #if defined(LOOKUP_MYSQL) && LOOKUP_MYSQL!=2
1038 fprintf(fp, " mysql");
1040 #if defined(LOOKUP_NIS) && LOOKUP_NIS!=2
1041 fprintf(fp, " nis nis0");
1043 #if defined(LOOKUP_NISPLUS) && LOOKUP_NISPLUS!=2
1044 fprintf(fp, " nisplus");
1046 #if defined(LOOKUP_ORACLE) && LOOKUP_ORACLE!=2
1047 fprintf(fp, " oracle");
1049 #if defined(LOOKUP_PASSWD) && LOOKUP_PASSWD!=2
1050 fprintf(fp, " passwd");
1052 #if defined(LOOKUP_PGSQL) && LOOKUP_PGSQL!=2
1053 fprintf(fp, " pgsql");
1055 #if defined(LOOKUP_REDIS) && LOOKUP_REDIS!=2
1056 fprintf(fp, " redis");
1058 #if defined(LOOKUP_SQLITE) && LOOKUP_SQLITE!=2
1059 fprintf(fp, " sqlite");
1061 #if defined(LOOKUP_TESTDB) && LOOKUP_TESTDB!=2
1062 fprintf(fp, " testdb");
1064 #if defined(LOOKUP_WHOSON) && LOOKUP_WHOSON!=2
1065 fprintf(fp, " whoson");
1069 auth_show_supported(fp);
1070 route_show_supported(fp);
1071 transport_show_supported(fp);
1073 #ifdef WITH_CONTENT_SCAN
1074 malware_show_supported(fp);
1077 if (fixed_never_users[0] > 0)
1080 fprintf(fp, "Fixed never_users: ");
1081 for (i = 1; i <= (int)fixed_never_users[0] - 1; i++)
1082 fprintf(fp, "%d:", (unsigned int)fixed_never_users[i]);
1083 fprintf(fp, "%d\n", (unsigned int)fixed_never_users[i]);
1086 fprintf(fp, "Configure owner: %d:%d\n", config_uid, config_gid);
1088 fprintf(fp, "Size of off_t: " SIZE_T_FMT "\n", sizeof(off_t));
1090 /* Everything else is details which are only worth reporting when debugging.
1091 Perhaps the tls_version_report should move into this too. */
1094 /* clang defines __GNUC__ (at least, for me) so test for it first */
1095 #if defined(__clang__)
1096 fprintf(fp, "Compiler: CLang [%s]\n", __clang_version__);
1097 #elif defined(__GNUC__)
1098 fprintf(fp, "Compiler: GCC [%s]\n",
1102 "? unknown version ?"
1106 fprintf(fp, "Compiler: <unknown>\n");
1109 #if defined(__GLIBC__) && !defined(__UCLIBC__)
1110 fprintf(fp, "Library version: Glibc: Compile: %d.%d\n",
1111 __GLIBC__, __GLIBC_MINOR__);
1112 if (__GLIBC_PREREQ(2, 1))
1113 fprintf(fp, " Runtime: %s\n",
1114 gnu_get_libc_version());
1117 show_db_version(fp);
1120 tls_version_report(fp);
1123 utf8_version_report(fp);
1126 spf_lib_version_report(fp);
1129 for (auth_info * authi = auths_available; *authi->driver_name != '\0'; ++authi)
1130 if (authi->version_report)
1131 (*authi->version_report)(fp);
1133 /* PCRE_PRERELEASE is either defined and empty or a bare sequence of
1134 characters; unless it's an ancient version of PCRE in which case it
1136 #ifndef PCRE_PRERELEASE
1137 # define PCRE_PRERELEASE
1140 #define EXPAND_AND_QUOTE(X) QUOTE(X)
1141 fprintf(fp, "Library version: PCRE: Compile: %d.%d%s\n"
1143 PCRE_MAJOR, PCRE_MINOR,
1144 EXPAND_AND_QUOTE(PCRE_PRERELEASE) "",
1147 #undef EXPAND_AND_QUOTE
1150 for (int i = 0; i < lookup_list_count; i++)
1151 if (lookup_list[i]->version_report)
1152 lookup_list[i]->version_report(fp);
1154 #ifdef WHITELIST_D_MACROS
1155 fprintf(fp, "WHITELIST_D_MACROS: \"%s\"\n", WHITELIST_D_MACROS);
1157 fprintf(fp, "WHITELIST_D_MACROS unset\n");
1159 #ifdef TRUSTED_CONFIG_LIST
1160 fprintf(fp, "TRUSTED_CONFIG_LIST: \"%s\"\n", TRUSTED_CONFIG_LIST);
1162 fprintf(fp, "TRUSTED_CONFIG_LIST unset\n");
1169 /*************************************************
1170 * Show auxiliary information about Exim *
1171 *************************************************/
1174 show_exim_information(enum commandline_info request, FILE *stream)
1179 fprintf(stream, "Oops, something went wrong.\n");
1183 "The -bI: flag takes a string indicating which information to provide.\n"
1184 "If the string is not recognised, you'll get this help (on stderr).\n"
1186 " exim -bI:help this information\n"
1187 " exim -bI:dscp list of known dscp value keywords\n"
1188 " exim -bI:sieve list of supported sieve extensions\n"
1192 for (const uschar ** pp = exim_sieve_extension_list; *pp; ++pp)
1193 fprintf(stream, "%s\n", *pp);
1196 dscp_list_to_stream(stream);
1202 /*************************************************
1203 * Quote a local part *
1204 *************************************************/
1206 /* This function is used when a sender address or a From: or Sender: header
1207 line is being created from the caller's login, or from an authenticated_id. It
1208 applies appropriate quoting rules for a local part.
1210 Argument: the local part
1211 Returns: the local part, quoted if necessary
1215 local_part_quote(uschar *lpart)
1217 BOOL needs_quote = FALSE;
1220 for (uschar * t = lpart; !needs_quote && *t != 0; t++)
1222 needs_quote = !isalnum(*t) && strchr("!#$%&'*+-/=?^_`{|}~", *t) == NULL &&
1223 (*t != '.' || t == lpart || t[1] == 0);
1226 if (!needs_quote) return lpart;
1228 g = string_catn(NULL, US"\"", 1);
1232 uschar *nq = US Ustrpbrk(lpart, "\\\"");
1235 g = string_cat(g, lpart);
1238 g = string_catn(g, lpart, nq - lpart);
1239 g = string_catn(g, US"\\", 1);
1240 g = string_catn(g, nq, 1);
1244 g = string_catn(g, US"\"", 1);
1245 return string_from_gstring(g);
1251 /*************************************************
1252 * Load readline() functions *
1253 *************************************************/
1255 /* This function is called from testing executions that read data from stdin,
1256 but only when running as the calling user. Currently, only -be does this. The
1257 function loads the readline() function library and passes back the functions.
1258 On some systems, it needs the curses library, so load that too, but try without
1259 it if loading fails. All this functionality has to be requested at build time.
1262 fn_readline_ptr pointer to where to put the readline pointer
1263 fn_addhist_ptr pointer to where to put the addhistory function
1265 Returns: the dlopen handle or NULL on failure
1269 set_readline(char * (**fn_readline_ptr)(const char *),
1270 void (**fn_addhist_ptr)(const char *))
1273 void *dlhandle_curses = dlopen("libcurses." DYNLIB_FN_EXT, RTLD_GLOBAL|RTLD_LAZY);
1275 dlhandle = dlopen("libreadline." DYNLIB_FN_EXT, RTLD_GLOBAL|RTLD_NOW);
1276 if (dlhandle_curses) dlclose(dlhandle_curses);
1280 /* Checked manual pages; at least in GNU Readline 6.1, the prototypes are:
1281 * char * readline (const char *prompt);
1282 * void add_history (const char *string);
1284 *fn_readline_ptr = (char *(*)(const char*))dlsym(dlhandle, "readline");
1285 *fn_addhist_ptr = (void(*)(const char*))dlsym(dlhandle, "add_history");
1288 DEBUG(D_any) debug_printf("failed to load readline: %s\n", dlerror());
1296 /*************************************************
1297 * Get a line from stdin for testing things *
1298 *************************************************/
1300 /* This function is called when running tests that can take a number of lines
1301 of input (for example, -be and -bt). It handles continuations and trailing
1302 spaces. And prompting and a blank line output on eof. If readline() is in use,
1303 the arguments are non-NULL and provide the relevant functions.
1306 fn_readline readline function or NULL
1307 fn_addhist addhist function or NULL
1309 Returns: pointer to dynamic memory, or NULL at end of file
1313 get_stdinput(char *(*fn_readline)(const char *), void(*fn_addhist)(const char *))
1317 if (!fn_readline) { printf("> "); fflush(stdout); }
1319 for (int i = 0;; i++)
1321 uschar buffer[1024];
1325 char *readline_line = NULL;
1328 if (!(readline_line = fn_readline((i > 0)? "":"> "))) break;
1329 if (*readline_line != 0 && fn_addhist) fn_addhist(readline_line);
1330 p = US readline_line;
1335 /* readline() not in use */
1338 if (Ufgets(buffer, sizeof(buffer), stdin) == NULL) break;
1342 /* Handle the line */
1344 ss = p + (int)Ustrlen(p);
1345 while (ss > p && isspace(ss[-1])) ss--;
1348 while (p < ss && isspace(*p)) p++; /* leading space after cont */
1350 g = string_catn(g, p, ss - p);
1353 if (fn_readline) free(readline_line);
1356 /* g can only be NULL if ss==p */
1357 if (ss == p || g->s[g->ptr-1] != '\\')
1361 (void) string_from_gstring(g);
1364 if (!g) printf("\n");
1365 return string_from_gstring(g);
1370 /*************************************************
1371 * Output usage information for the program *
1372 *************************************************/
1374 /* This function is called when there are no recipients
1375 or a specific --help argument was added.
1378 progname information on what name we were called by
1380 Returns: DOES NOT RETURN
1384 exim_usage(uschar *progname)
1387 /* Handle specific program invocation variants */
1388 if (Ustrcmp(progname, US"-mailq") == 0)
1390 "mailq - list the contents of the mail queue\n\n"
1391 "For a list of options, see the Exim documentation.\n");
1393 /* Generic usage - we output this whatever happens */
1395 "Exim is a Mail Transfer Agent. It is normally called by Mail User Agents,\n"
1396 "not directly from a shell command line. Options and/or arguments control\n"
1397 "what it does when called. For a list of options, see the Exim documentation.\n");
1402 /*************************************************
1403 * Validate that the macros given are okay *
1404 *************************************************/
1406 /* Typically, Exim will drop privileges if macros are supplied. In some
1407 cases, we want to not do so.
1409 Arguments: opt_D_used - true if the commandline had a "-D" option
1410 Returns: true if trusted, false otherwise
1414 macros_trusted(BOOL opt_D_used)
1416 #ifdef WHITELIST_D_MACROS
1417 uschar *whitelisted, *end, *p, **whites;
1418 int white_count, i, n;
1420 BOOL prev_char_item, found;
1425 #ifndef WHITELIST_D_MACROS
1429 /* We only trust -D overrides for some invoking users:
1430 root, the exim run-time user, the optional config owner user.
1431 I don't know why config-owner would be needed, but since they can own the
1432 config files anyway, there's no security risk to letting them override -D. */
1433 if ( ! ((real_uid == root_uid)
1434 || (real_uid == exim_uid)
1435 #ifdef CONFIGURE_OWNER
1436 || (real_uid == config_uid)
1440 debug_printf("macros_trusted rejecting macros for uid %d\n", (int) real_uid);
1444 /* Get a list of macros which are whitelisted */
1445 whitelisted = string_copy_perm(US WHITELIST_D_MACROS, FALSE);
1446 prev_char_item = FALSE;
1448 for (p = whitelisted; *p != '\0'; ++p)
1450 if (*p == ':' || isspace(*p))
1455 prev_char_item = FALSE;
1458 if (!prev_char_item)
1459 prev_char_item = TRUE;
1466 whites = store_malloc(sizeof(uschar *) * (white_count+1));
1467 for (p = whitelisted, i = 0; (p != end) && (i < white_count); ++p)
1472 if (i == white_count)
1474 while (*p != '\0' && p < end)
1480 /* The list of commandline macros should be very short.
1481 Accept the N*M complexity. */
1482 for (macro_item * m = macros_user; m; m = m->next) if (m->command_line)
1485 for (uschar ** w = whites; *w; ++w)
1486 if (Ustrcmp(*w, m->name) == 0)
1493 if (!m->replacement)
1495 if ((len = m->replen) == 0)
1497 n = pcre_exec(regex_whitelisted_macro, NULL, CS m->replacement, len,
1498 0, PCRE_EOPT, NULL, 0);
1501 if (n != PCRE_ERROR_NOMATCH)
1502 debug_printf("macros_trusted checking %s returned %d\n", m->name, n);
1506 DEBUG(D_any) debug_printf("macros_trusted overridden to true by whitelisting\n");
1512 /*************************************************
1513 * Expansion testing *
1514 *************************************************/
1516 /* Expand and print one item, doing macro-processing.
1519 item line for expansion
1523 expansion_test_line(uschar * line)
1528 Ustrncpy(big_buffer, line, big_buffer_size);
1529 big_buffer[big_buffer_size-1] = '\0';
1530 len = Ustrlen(big_buffer);
1532 (void) macros_expand(0, &len, &dummy_macexp);
1534 if (isupper(big_buffer[0]))
1536 if (macro_read_assignment(big_buffer))
1537 printf("Defined macro '%s'\n", mlast->name);
1540 if ((line = expand_string(big_buffer))) printf("%s\n", CS line);
1541 else printf("Failed: %s\n", expand_string_message);
1546 /*************************************************
1547 * Entry point and high-level code *
1548 *************************************************/
1550 /* Entry point for the Exim mailer. Analyse the arguments and arrange to take
1551 the appropriate action. All the necessary functions are present in the one
1552 binary. I originally thought one should split it up, but it turns out that so
1553 much of the apparatus is needed in each chunk that one might as well just have
1554 it all available all the time, which then makes the coding easier as well.
1557 argc count of entries in argv
1558 argv argument strings, with argv[0] being the program name
1560 Returns: EXIT_SUCCESS if terminated successfully
1561 EXIT_FAILURE otherwise, except when a message has been sent
1562 to the sender, and -oee was given
1566 main(int argc, char **cargv)
1568 uschar **argv = USS cargv;
1569 int arg_receive_timeout = -1;
1570 int arg_smtp_receive_timeout = -1;
1571 int arg_error_handling = error_handling;
1572 int filter_sfd = -1;
1573 int filter_ufd = -1;
1576 int list_queue_option = 0;
1578 int msg_action_arg = -1;
1579 int namelen = (argv[0] == NULL)? 0 : Ustrlen(argv[0]);
1580 int queue_only_reason = 0;
1582 int perl_start_option = 0;
1584 int recipients_arg = argc;
1585 int sender_address_domain = 0;
1586 int test_retry_arg = -1;
1587 int test_rewrite_arg = -1;
1588 gid_t original_egid;
1589 BOOL arg_queue_only = FALSE;
1590 BOOL bi_option = FALSE;
1591 BOOL checking = FALSE;
1592 BOOL count_queue = FALSE;
1593 BOOL expansion_test = FALSE;
1594 BOOL extract_recipients = FALSE;
1595 BOOL flag_G = FALSE;
1596 BOOL flag_n = FALSE;
1597 BOOL forced_delivery = FALSE;
1598 BOOL f_end_dot = FALSE;
1599 BOOL deliver_give_up = FALSE;
1600 BOOL list_queue = FALSE;
1601 BOOL list_options = FALSE;
1602 BOOL list_config = FALSE;
1603 BOOL local_queue_only;
1605 BOOL one_msg_action = FALSE;
1606 BOOL opt_D_used = FALSE;
1607 BOOL queue_only_set = FALSE;
1608 BOOL receiving_message = TRUE;
1609 BOOL sender_ident_set = FALSE;
1610 BOOL session_local_queue_only;
1612 BOOL removed_privilege = FALSE;
1613 BOOL usage_wanted = FALSE;
1614 BOOL verify_address_mode = FALSE;
1615 BOOL verify_as_sender = FALSE;
1616 BOOL version_printed = FALSE;
1617 uschar *alias_arg = NULL;
1618 uschar *called_as = US"";
1619 uschar *cmdline_syslog_name = NULL;
1620 uschar *start_queue_run_id = NULL;
1621 uschar *stop_queue_run_id = NULL;
1622 uschar *expansion_test_message = NULL;
1623 uschar *ftest_domain = NULL;
1624 uschar *ftest_localpart = NULL;
1625 uschar *ftest_prefix = NULL;
1626 uschar *ftest_suffix = NULL;
1627 uschar *log_oneline = NULL;
1628 uschar *malware_test_file = NULL;
1629 uschar *real_sender_address;
1630 uschar *originator_home = US"/";
1635 struct stat statbuf;
1636 pid_t passed_qr_pid = (pid_t)0;
1637 int passed_qr_pipe = -1;
1638 gid_t group_list[EXIM_GROUPLIST_SIZE];
1640 /* For the -bI: flag */
1641 enum commandline_info info_flag = CMDINFO_NONE;
1642 BOOL info_stdout = FALSE;
1644 /* Possible options for -R and -S */
1646 static uschar *rsopts[] = { US"f", US"ff", US"r", US"rf", US"rff" };
1648 /* Need to define this in case we need to change the environment in order
1649 to get rid of a bogus time zone. We have to make it char rather than uschar
1650 because some OS define it in /usr/include/unistd.h. */
1652 extern char **environ;
1654 #ifdef MEASURE_TIMING
1655 (void)gettimeofday(×tamp_startup, NULL);
1658 /* If the Exim user and/or group and/or the configuration file owner/group were
1659 defined by ref:name at build time, we must now find the actual uid/gid values.
1660 This is a feature to make the lives of binary distributors easier. */
1662 #ifdef EXIM_USERNAME
1663 if (route_finduser(US EXIM_USERNAME, &pw, &exim_uid))
1666 exim_fail("exim: refusing to run with uid 0 for \"%s\"\n", EXIM_USERNAME);
1668 /* If ref:name uses a number as the name, route_finduser() returns
1669 TRUE with exim_uid set and pw coerced to NULL. */
1671 exim_gid = pw->pw_gid;
1672 #ifndef EXIM_GROUPNAME
1675 "exim: ref:name should specify a usercode, not a group.\n"
1676 "exim: can't let you get away with it unless you also specify a group.\n");
1680 exim_fail("exim: failed to find uid for user name \"%s\"\n", EXIM_USERNAME);
1683 #ifdef EXIM_GROUPNAME
1684 if (!route_findgroup(US EXIM_GROUPNAME, &exim_gid))
1685 exim_fail("exim: failed to find gid for group name \"%s\"\n", EXIM_GROUPNAME);
1688 #ifdef CONFIGURE_OWNERNAME
1689 if (!route_finduser(US CONFIGURE_OWNERNAME, NULL, &config_uid))
1690 exim_fail("exim: failed to find uid for user name \"%s\"\n",
1691 CONFIGURE_OWNERNAME);
1694 /* We default the system_filter_user to be the Exim run-time user, as a
1695 sane non-root value. */
1696 system_filter_uid = exim_uid;
1698 #ifdef CONFIGURE_GROUPNAME
1699 if (!route_findgroup(US CONFIGURE_GROUPNAME, &config_gid))
1700 exim_fail("exim: failed to find gid for group name \"%s\"\n",
1701 CONFIGURE_GROUPNAME);
1704 /* In the Cygwin environment, some initialization used to need doing.
1705 It was fudged in by means of this macro; now no longer but we'll leave
1706 it in case of others. */
1712 /* Check a field which is patched when we are running Exim within its
1713 testing harness; do a fast initial check, and then the whole thing. */
1715 f.running_in_test_harness =
1716 *running_status == '<' && Ustrcmp(running_status, "<<<testing>>>") == 0;
1717 if (f.running_in_test_harness)
1720 /* The C standard says that the equivalent of setlocale(LC_ALL, "C") is obeyed
1721 at the start of a program; however, it seems that some environments do not
1722 follow this. A "strange" locale can affect the formatting of timestamps, so we
1725 setlocale(LC_ALL, "C");
1727 /* Get the offset between CLOCK_MONOTONIC and wallclock */
1729 #ifdef _POSIX_MONOTONIC_CLOCK
1733 /* Set up the default handler for timing using alarm(). */
1735 os_non_restarting_signal(SIGALRM, sigalrm_handler);
1737 /* Ensure we have a buffer for constructing log entries. Use malloc directly,
1738 because store_malloc writes a log entry on failure. */
1740 if (!(log_buffer = US malloc(LOG_BUFFER_SIZE)))
1741 exim_fail("exim: failed to get store for log buffer\n");
1743 /* Initialize the default log options. */
1745 bits_set(log_selector, log_selector_size, log_default);
1747 /* Set log_stderr to stderr, provided that stderr exists. This gets reset to
1748 NULL when the daemon is run and the file is closed. We have to use this
1749 indirection, because some systems don't allow writing to the variable "stderr".
1752 if (fstat(fileno(stderr), &statbuf) >= 0) log_stderr = stderr;
1754 /* Arrange for the PCRE regex library to use our store functions. Note that
1755 the normal calls are actually macros that add additional arguments for
1756 debugging purposes so we have to assign specially constructed functions here.
1757 The default is to use store in the stacking pool, but this is overridden in the
1758 regex_must_compile() function. */
1760 pcre_malloc = function_store_get;
1761 pcre_free = function_dummy_free;
1763 /* Ensure there is a big buffer for temporary use in several places. It is put
1764 in malloc store so that it can be freed for enlargement if necessary. */
1766 big_buffer = store_malloc(big_buffer_size);
1768 /* Set up the handler for the data request signal, and set the initial
1769 descriptive text. */
1771 process_info = store_get(PROCESS_INFO_SIZE, TRUE); /* tainted */
1772 set_process_info("initializing");
1773 os_restarting_signal(SIGUSR1, usr1_handler);
1775 /* If running in a dockerized environment, the TERM signal is only
1776 delegated to the PID 1 if we request it by setting an signal handler */
1777 if (getpid() == 1) signal(SIGTERM, term_handler);
1779 /* SIGHUP is used to get the daemon to reconfigure. It gets set as appropriate
1780 in the daemon code. For the rest of Exim's uses, we ignore it. */
1782 signal(SIGHUP, SIG_IGN);
1784 /* We don't want to die on pipe errors as the code is written to handle
1785 the write error instead. */
1787 signal(SIGPIPE, SIG_IGN);
1789 /* Under some circumstance on some OS, Exim can get called with SIGCHLD
1790 set to SIG_IGN. This causes subprocesses that complete before the parent
1791 process waits for them not to hang around, so when Exim calls wait(), nothing
1792 is there. The wait() code has been made robust against this, but let's ensure
1793 that SIGCHLD is set to SIG_DFL, because it's tidier to wait and get a process
1794 ending status. We use sigaction rather than plain signal() on those OS where
1795 SA_NOCLDWAIT exists, because we want to be sure it is turned off. (There was a
1796 problem on AIX with this.) */
1800 struct sigaction act;
1801 act.sa_handler = SIG_DFL;
1802 sigemptyset(&(act.sa_mask));
1804 sigaction(SIGCHLD, &act, NULL);
1807 signal(SIGCHLD, SIG_DFL);
1810 /* Save the arguments for use if we re-exec exim as a daemon after receiving
1815 /* Set up the version number. Set up the leading 'E' for the external form of
1816 message ids, set the pointer to the internal form, and initialize it to
1817 indicate no message being processed. */
1820 message_id_option[0] = '-';
1821 message_id_external = message_id_option + 1;
1822 message_id_external[0] = 'E';
1823 message_id = message_id_external + 1;
1826 /* Set the umask to zero so that any files Exim creates using open() are
1827 created with the modes that it specifies. NOTE: Files created with fopen() have
1828 a problem, which was not recognized till rather late (February 2006). With this
1829 umask, such files will be world writeable. (They are all content scanning files
1830 in the spool directory, which isn't world-accessible, so this is not a
1831 disaster, but it's untidy.) I don't want to change this overall setting,
1832 however, because it will interact badly with the open() calls. Instead, there's
1833 now a function called modefopen() that fiddles with the umask while calling
1838 /* Precompile the regular expression for matching a message id. Keep this in
1839 step with the code that generates ids in the accept.c module. We need to do
1840 this here, because the -M options check their arguments for syntactic validity
1841 using mac_ismsgid, which uses this. */
1844 regex_must_compile(US"^(?:[^\\W_]{6}-){2}[^\\W_]{2}$", FALSE, TRUE);
1846 /* Precompile the regular expression that is used for matching an SMTP error
1847 code, possibly extended, at the start of an error message. Note that the
1848 terminating whitespace character is included. */
1851 regex_must_compile(US"^\\d\\d\\d\\s(?:\\d\\.\\d\\d?\\d?\\.\\d\\d?\\d?\\s)?",
1854 #ifdef WHITELIST_D_MACROS
1855 /* Precompile the regular expression used to filter the content of macros
1856 given to -D for permissibility. */
1858 regex_whitelisted_macro =
1859 regex_must_compile(US"^[A-Za-z0-9_/.-]*$", FALSE, TRUE);
1862 for (i = 0; i < REGEX_VARS; i++) regex_vars[i] = NULL;
1864 /* If the program is called as "mailq" treat it as equivalent to "exim -bp";
1865 this seems to be a generally accepted convention, since one finds symbolic
1866 links called "mailq" in standard OS configurations. */
1868 if ((namelen == 5 && Ustrcmp(argv[0], "mailq") == 0) ||
1869 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/mailq", 6) == 0))
1872 receiving_message = FALSE;
1873 called_as = US"-mailq";
1876 /* If the program is called as "rmail" treat it as equivalent to
1877 "exim -i -oee", thus allowing UUCP messages to be input using non-SMTP mode,
1878 i.e. preventing a single dot on a line from terminating the message, and
1879 returning with zero return code, even in cases of error (provided an error
1880 message has been sent). */
1882 if ((namelen == 5 && Ustrcmp(argv[0], "rmail") == 0) ||
1883 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/rmail", 6) == 0))
1886 called_as = US"-rmail";
1887 errors_sender_rc = EXIT_SUCCESS;
1890 /* If the program is called as "rsmtp" treat it as equivalent to "exim -bS";
1891 this is a smail convention. */
1893 if ((namelen == 5 && Ustrcmp(argv[0], "rsmtp") == 0) ||
1894 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/rsmtp", 6) == 0))
1896 smtp_input = smtp_batched_input = TRUE;
1897 called_as = US"-rsmtp";
1900 /* If the program is called as "runq" treat it as equivalent to "exim -q";
1901 this is a smail convention. */
1903 if ((namelen == 4 && Ustrcmp(argv[0], "runq") == 0) ||
1904 (namelen > 4 && Ustrncmp(argv[0] + namelen - 5, "/runq", 5) == 0))
1907 receiving_message = FALSE;
1908 called_as = US"-runq";
1911 /* If the program is called as "newaliases" treat it as equivalent to
1912 "exim -bi"; this is a sendmail convention. */
1914 if ((namelen == 10 && Ustrcmp(argv[0], "newaliases") == 0) ||
1915 (namelen > 10 && Ustrncmp(argv[0] + namelen - 11, "/newaliases", 11) == 0))
1918 receiving_message = FALSE;
1919 called_as = US"-newaliases";
1922 /* Save the original effective uid for a couple of uses later. It should
1923 normally be root, but in some esoteric environments it may not be. */
1925 original_euid = geteuid();
1926 original_egid = getegid();
1928 /* Get the real uid and gid. If the caller is root, force the effective uid/gid
1929 to be the same as the real ones. This makes a difference only if Exim is setuid
1930 (or setgid) to something other than root, which could be the case in some
1931 special configurations. */
1933 real_uid = getuid();
1934 real_gid = getgid();
1936 if (real_uid == root_uid)
1938 if ((rv = setgid(real_gid)))
1939 exim_fail("exim: setgid(%ld) failed: %s\n",
1940 (long int)real_gid, strerror(errno));
1941 if ((rv = setuid(real_uid)))
1942 exim_fail("exim: setuid(%ld) failed: %s\n",
1943 (long int)real_uid, strerror(errno));
1946 /* If neither the original real uid nor the original euid was root, Exim is
1947 running in an unprivileged state. */
1949 unprivileged = (real_uid != root_uid && original_euid != root_uid);
1951 /* Scan the program's arguments. Some can be dealt with right away; others are
1952 simply recorded for checking and handling afterwards. Do a high-level switch
1953 on the second character (the one after '-'), to save some effort. */
1955 for (i = 1; i < argc; i++)
1957 BOOL badarg = FALSE;
1958 uschar *arg = argv[i];
1962 /* An argument not starting with '-' is the start of a recipients list;
1963 break out of the options-scanning loop. */
1971 /* An option consisting of -- terminates the options */
1973 if (Ustrcmp(arg, "--") == 0)
1975 recipients_arg = i + 1;
1979 /* Handle flagged options */
1981 switchchar = arg[1];
1984 /* Make all -ex options synonymous with -oex arguments, since that
1985 is assumed by various callers. Also make -qR options synonymous with -R
1986 options, as that seems to be required as well. Allow for -qqR too, and
1987 the same for -S options. */
1989 if (Ustrncmp(arg+1, "oe", 2) == 0 ||
1990 Ustrncmp(arg+1, "qR", 2) == 0 ||
1991 Ustrncmp(arg+1, "qS", 2) == 0)
1993 switchchar = arg[2];
1996 else if (Ustrncmp(arg+1, "qqR", 3) == 0 || Ustrncmp(arg+1, "qqS", 3) == 0)
1998 switchchar = arg[3];
2000 f.queue_2stage = TRUE;
2003 /* Make -r synonymous with -f, since it is a documented alias */
2005 else if (arg[1] == 'r') switchchar = 'f';
2007 /* Make -ov synonymous with -v */
2009 else if (Ustrcmp(arg, "-ov") == 0)
2015 /* deal with --option_aliases */
2016 else if (switchchar == '-')
2018 if (Ustrcmp(argrest, "help") == 0)
2020 usage_wanted = TRUE;
2023 else if (Ustrcmp(argrest, "version") == 0)
2030 /* High-level switch on active initial letter */
2035 /* sendmail uses -Ac and -Am to control which .cf file is used;
2038 if (*argrest == '\0') { badarg = TRUE; break; }
2041 BOOL ignore = FALSE;
2046 if (*(argrest + 1) == '\0')
2050 if (!ignore) badarg = TRUE;
2054 /* -Btype is a sendmail option for 7bit/8bit setting. Exim is 8-bit clean
2055 so has no need of it. */
2058 if (!*argrest) i++; /* Skip over the type */
2064 receiving_message = FALSE; /* Reset TRUE for -bm, -bS, -bs below */
2068 /* -bd: Run in daemon mode, awaiting SMTP connections.
2069 -bdf: Ditto, but in the foreground.
2072 f.daemon_listen = TRUE;
2073 if (*argrest == 'f') f.background_daemon = FALSE;
2074 else if (*argrest) badarg = TRUE;
2077 /* -be: Run in expansion test mode
2078 -bem: Ditto, but read a message from a file first
2081 expansion_test = checking = TRUE;
2082 if (*argrest == 'm')
2084 if (++i >= argc) { badarg = TRUE; break; }
2085 expansion_test_message = argv[i];
2088 if (*argrest) badarg = TRUE;
2091 /* -bF: Run system filter test */
2093 filter_test |= checking = FTEST_SYSTEM;
2094 if (*argrest) { badarg = TRUE; break; }
2095 if (++i < argc) filter_test_sfile = argv[i]; else
2096 exim_fail("exim: file name expected after %s\n", argv[i-1]);
2099 /* -bf: Run user filter test
2100 -bfd: Set domain for filter testing
2101 -bfl: Set local part for filter testing
2102 -bfp: Set prefix for filter testing
2103 -bfs: Set suffix for filter testing
2108 filter_test |= checking = FTEST_USER;
2109 if (++i < argc) filter_test_ufile = argv[i];
2110 else exim_fail("exim: file name expected after %s\n", argv[i-1]);
2115 exim_fail("exim: string expected after %s\n", arg);
2116 if (Ustrcmp(argrest, "d") == 0) ftest_domain = argv[i];
2117 else if (Ustrcmp(argrest, "l") == 0) ftest_localpart = argv[i];
2118 else if (Ustrcmp(argrest, "p") == 0) ftest_prefix = argv[i];
2119 else if (Ustrcmp(argrest, "s") == 0) ftest_suffix = argv[i];
2124 /* -bh: Host checking - an IP address must follow. */
2126 if (!*argrest || Ustrcmp(argrest, "c") == 0)
2128 if (++i >= argc) { badarg = TRUE; break; }
2129 sender_host_address = argv[i];
2130 host_checking = checking = f.log_testing_mode = TRUE;
2131 f.host_checking_callout = *argrest == 'c';
2132 message_logs = FALSE;
2137 /* -bi: This option is used by sendmail to initialize *the* alias file,
2138 though it has the -oA option to specify a different file. Exim has no
2139 concept of *the* alias file, but since Sun's YP make script calls
2140 sendmail this way, some support must be provided. */
2142 if (!*++argrest) bi_option = TRUE;
2146 /* -bI: provide information, of the type to follow after a colon.
2147 This is an Exim flag. */
2149 if (Ustrlen(argrest) >= 1 && *argrest == ':')
2151 uschar *p = argrest+1;
2152 info_flag = CMDINFO_HELP;
2154 if (strcmpic(p, CUS"sieve") == 0)
2156 info_flag = CMDINFO_SIEVE;
2159 else if (strcmpic(p, CUS"dscp") == 0)
2161 info_flag = CMDINFO_DSCP;
2164 else if (strcmpic(p, CUS"help") == 0)
2170 /* -bm: Accept and deliver message - the default option. Reinstate
2171 receiving_message, which got turned off for all -b options.
2172 -bmalware: test the filename given for malware */
2174 if (!*argrest) receiving_message = TRUE;
2175 else if (Ustrcmp(argrest, "alware") == 0)
2177 if (++i >= argc) { badarg = TRUE; break; }
2179 malware_test_file = argv[i];
2184 /* -bnq: For locally originating messages, do not qualify unqualified
2185 addresses. In the envelope, this causes errors; in header lines they
2188 if (Ustrcmp(argrest, "q") == 0)
2190 f.allow_unqualified_sender = FALSE;
2191 f.allow_unqualified_recipient = FALSE;
2196 /* -bpxx: List the contents of the mail queue, in various forms. If
2197 the option is -bpc, just a queue count is needed. Otherwise, if the
2198 first letter after p is r, then order is random. */
2200 if (*argrest == 'c')
2203 if (*++argrest) badarg = TRUE;
2207 if (*argrest == 'r')
2209 list_queue_option = 8;
2212 else list_queue_option = 0;
2216 /* -bp: List the contents of the mail queue, top-level only */
2220 /* -bpu: List the contents of the mail queue, top-level undelivered */
2222 else if (Ustrcmp(argrest, "u") == 0) list_queue_option += 1;
2224 /* -bpa: List the contents of the mail queue, including all delivered */
2226 else if (Ustrcmp(argrest, "a") == 0) list_queue_option += 2;
2228 /* Unknown after -bp[r] */
2234 /* -bP: List the configuration variables given as the address list.
2235 Force -v, so configuration errors get displayed. */
2238 /* -bP config: we need to setup here, because later,
2239 * when list_options is checked, the config is read already */
2242 else if (argv[i+1] && Ustrcmp(argv[i+1], "config") == 0)
2245 readconf_save_config(version_string);
2249 list_options = TRUE;
2250 debug_selector |= D_v;
2251 debug_file = stderr;
2255 /* -brt: Test retry configuration lookup */
2257 if (Ustrcmp(argrest, "t") == 0)
2260 test_retry_arg = i + 1;
2264 /* -brw: Test rewrite configuration */
2266 else if (Ustrcmp(argrest, "w") == 0)
2269 test_rewrite_arg = i + 1;
2275 /* -bS: Read SMTP commands on standard input, but produce no replies -
2276 all errors are reported by sending messages. */
2279 smtp_input = smtp_batched_input = receiving_message = TRUE;
2283 /* -bs: Read SMTP commands on standard input and produce SMTP replies
2284 on standard output. */
2286 if (!*argrest) smtp_input = receiving_message = TRUE;
2290 /* -bt: address testing mode */
2293 f.address_test_mode = checking = f.log_testing_mode = TRUE;
2297 /* -bv: verify addresses */
2300 verify_address_mode = checking = f.log_testing_mode = TRUE;
2302 /* -bvs: verify sender addresses */
2304 else if (Ustrcmp(argrest, "s") == 0)
2306 verify_address_mode = checking = f.log_testing_mode = TRUE;
2307 verify_as_sender = TRUE;
2312 /* -bV: Print version string and support details */
2316 printf("Exim version %s #%s built %s\n", version_string,
2317 version_cnumber, version_date);
2318 printf("%s\n", CS version_copyright);
2319 version_printed = TRUE;
2320 show_whats_supported(stdout);
2321 f.log_testing_mode = TRUE;
2326 /* -bw: inetd wait mode, accept a listening socket as stdin */
2328 f.inetd_wait_mode = TRUE;
2329 f.background_daemon = FALSE;
2330 f.daemon_listen = TRUE;
2332 if ((inetd_wait_timeout = readconf_readtime(argrest, 0, FALSE)) <= 0)
2333 exim_fail("exim: bad time value %s: abandoned\n", argv[i]);
2344 /* -C: change configuration file list; ignore if it isn't really
2345 a change! Enforce a prefix check if required. */
2350 if(++i < argc) argrest = argv[i]; else
2351 { badarg = TRUE; break; }
2353 if (Ustrcmp(config_main_filelist, argrest) != 0)
2355 #ifdef ALT_CONFIG_PREFIX
2357 int len = Ustrlen(ALT_CONFIG_PREFIX);
2358 const uschar *list = argrest;
2360 while((filename = string_nextinlist(&list, &sep, big_buffer,
2361 big_buffer_size)) != NULL)
2363 if ((Ustrlen(filename) < len ||
2364 Ustrncmp(filename, ALT_CONFIG_PREFIX, len) != 0 ||
2365 Ustrstr(filename, "/../") != NULL) &&
2366 (Ustrcmp(filename, "/dev/null") != 0 || real_uid != root_uid))
2367 exim_fail("-C Permission denied\n");
2370 if (real_uid != root_uid)
2372 #ifdef TRUSTED_CONFIG_LIST
2374 if (real_uid != exim_uid
2375 #ifdef CONFIGURE_OWNER
2376 && real_uid != config_uid
2379 f.trusted_config = FALSE;
2382 FILE *trust_list = Ufopen(TRUSTED_CONFIG_LIST, "rb");
2385 struct stat statbuf;
2387 if (fstat(fileno(trust_list), &statbuf) != 0 ||
2388 (statbuf.st_uid != root_uid /* owner not root */
2389 #ifdef CONFIGURE_OWNER
2390 && statbuf.st_uid != config_uid /* owner not the special one */
2393 (statbuf.st_gid != root_gid /* group not root */
2394 #ifdef CONFIGURE_GROUP
2395 && statbuf.st_gid != config_gid /* group not the special one */
2397 && (statbuf.st_mode & 020) != 0 /* group writeable */
2399 (statbuf.st_mode & 2) != 0) /* world writeable */
2401 f.trusted_config = FALSE;
2406 /* Well, the trust list at least is up to scratch... */
2407 rmark reset_point = store_mark();
2408 uschar *trusted_configs[32];
2412 while (Ufgets(big_buffer, big_buffer_size, trust_list))
2414 uschar *start = big_buffer, *nl;
2415 while (*start && isspace(*start))
2419 nl = Ustrchr(start, '\n');
2422 trusted_configs[nr_configs++] = string_copy(start);
2423 if (nr_configs == 32)
2431 const uschar *list = argrest;
2433 while (f.trusted_config && (filename = string_nextinlist(&list,
2434 &sep, big_buffer, big_buffer_size)) != NULL)
2436 for (i=0; i < nr_configs; i++)
2437 if (Ustrcmp(filename, trusted_configs[i]) == 0)
2439 if (i == nr_configs)
2441 f.trusted_config = FALSE;
2446 else /* No valid prefixes found in trust_list file. */
2447 f.trusted_config = FALSE;
2448 store_reset(reset_point);
2451 else /* Could not open trust_list file. */
2452 f.trusted_config = FALSE;
2455 /* Not root; don't trust config */
2456 f.trusted_config = FALSE;
2460 config_main_filelist = argrest;
2461 f.config_changed = TRUE;
2466 /* -D: set up a macro definition */
2469 #ifdef DISABLE_D_OPTION
2470 exim_fail("exim: -D is not available in this Exim binary\n");
2476 uschar *s = argrest;
2479 while (isspace(*s)) s++;
2481 if (*s < 'A' || *s > 'Z')
2482 exim_fail("exim: macro name set by -D must start with "
2483 "an upper case letter\n");
2485 while (isalnum(*s) || *s == '_')
2487 if (ptr < sizeof(name)-1) name[ptr++] = *s;
2491 if (ptr == 0) { badarg = TRUE; break; }
2492 while (isspace(*s)) s++;
2495 if (*s++ != '=') { badarg = TRUE; break; }
2496 while (isspace(*s)) s++;
2499 for (m = macros_user; m; m = m->next)
2500 if (Ustrcmp(m->name, name) == 0)
2501 exim_fail("exim: duplicated -D in command line\n");
2503 m = macro_create(name, s, TRUE);
2505 if (clmacro_count >= MAX_CLMACROS)
2506 exim_fail("exim: too many -D options on command line\n");
2507 clmacros[clmacro_count++] =
2508 string_sprintf("-D%s=%s", m->name, m->replacement);
2513 /* -d: Set debug level (see also -v below) or set the drop_cr option.
2514 The latter is now a no-op, retained for compatibility only. If -dd is used,
2515 debugging subprocesses of the daemon is disabled. */
2518 if (Ustrcmp(argrest, "ropcr") == 0)
2520 /* drop_cr = TRUE; */
2523 /* Use an intermediate variable so that we don't set debugging while
2524 decoding the debugging bits. */
2528 unsigned int selector = D_default;
2531 if (*argrest == 'd')
2533 f.debug_daemon = TRUE;
2537 decode_bits(&selector, 1, debug_notall, argrest,
2538 debug_options, debug_options_count, US"debug", 0);
2539 debug_selector = selector;
2544 /* -E: This is a local error message. This option is not intended for
2545 external use at all, but is not restricted to trusted callers because it
2546 does no harm (just suppresses certain error messages) and if Exim is run
2547 not setuid root it won't always be trusted when it generates error
2548 messages using this option. If there is a message id following -E, point
2549 message_reference at it, for logging. */
2552 f.local_error_message = TRUE;
2553 if (mac_ismsgid(argrest)) message_reference = argrest;
2557 /* -ex: The vacation program calls sendmail with the undocumented "-eq"
2558 option, so it looks as if historically the -oex options are also callable
2559 without the leading -o. So we have to accept them. Before the switch,
2560 anything starting -oe has been converted to -e. Exim does not support all
2561 of the sendmail error options. */
2564 if (Ustrcmp(argrest, "e") == 0)
2566 arg_error_handling = ERRORS_SENDER;
2567 errors_sender_rc = EXIT_SUCCESS;
2569 else if (Ustrcmp(argrest, "m") == 0) arg_error_handling = ERRORS_SENDER;
2570 else if (Ustrcmp(argrest, "p") == 0) arg_error_handling = ERRORS_STDERR;
2571 else if (Ustrcmp(argrest, "q") == 0) arg_error_handling = ERRORS_STDERR;
2572 else if (Ustrcmp(argrest, "w") == 0) arg_error_handling = ERRORS_SENDER;
2577 /* -F: Set sender's full name, used instead of the gecos entry from
2578 the password file. Since users can usually alter their gecos entries,
2579 there's no security involved in using this instead. The data can follow
2580 the -F or be in the next argument. */
2585 if(++i < argc) argrest = argv[i]; else
2586 { badarg = TRUE; break; }
2588 originator_name = argrest;
2589 f.sender_name_forced = TRUE;
2593 /* -f: Set sender's address - this value is only actually used if Exim is
2594 run by a trusted user, or if untrusted_set_sender is set and matches the
2595 address, except that the null address can always be set by any user. The
2596 test for this happens later, when the value given here is ignored when not
2597 permitted. For an untrusted user, the actual sender is still put in Sender:
2598 if it doesn't match the From: header (unless no_local_from_check is set).
2599 The data can follow the -f or be in the next argument. The -r switch is an
2600 obsolete form of -f but since there appear to be programs out there that
2601 use anything that sendmail has ever supported, better accept it - the
2602 synonymizing is done before the switch above.
2604 At this stage, we must allow domain literal addresses, because we don't
2605 know what the setting of allow_domain_literals is yet. Ditto for trailing
2606 dots and strip_trailing_dot. */
2610 int dummy_start, dummy_end;
2614 if (i+1 < argc) argrest = argv[++i]; else
2615 { badarg = TRUE; break; }
2618 *(sender_address = store_get(1, FALSE)) = '\0'; /* Ensure writeable memory */
2621 uschar *temp = argrest + Ustrlen(argrest) - 1;
2622 while (temp >= argrest && isspace(*temp)) temp--;
2623 if (temp >= argrest && *temp == '.') f_end_dot = TRUE;
2624 allow_domain_literals = TRUE;
2625 strip_trailing_dot = TRUE;
2627 allow_utf8_domains = TRUE;
2629 sender_address = parse_extract_address(argrest, &errmess,
2630 &dummy_start, &dummy_end, &sender_address_domain, TRUE);
2631 sender_address = string_copy_taint(sender_address, TRUE);
2633 message_smtputf8 = string_is_utf8(sender_address);
2634 allow_utf8_domains = FALSE;
2636 allow_domain_literals = FALSE;
2637 strip_trailing_dot = FALSE;
2638 if (!sender_address)
2639 exim_fail("exim: bad -f address \"%s\": %s\n", argrest, errmess);
2641 f.sender_address_forced = TRUE;
2645 /* -G: sendmail invocation to specify that it's a gateway submission and
2646 sendmail may complain about problems instead of fixing them.
2647 We make it equivalent to an ACL "control = suppress_local_fixups" and do
2648 not at this time complain about problems. */
2654 /* -h: Set the hop count for an incoming message. Exim does not currently
2655 support this; it always computes it by counting the Received: headers.
2656 To put it in will require a change to the spool header file format. */
2661 if(++i < argc) argrest = argv[i]; else
2662 { badarg = TRUE; break; }
2664 if (!isdigit(*argrest)) badarg = TRUE;
2668 /* -i: Set flag so dot doesn't end non-SMTP input (same as -oi, seems
2669 not to be documented for sendmail but mailx (at least) uses it) */
2672 if (*argrest == 0) f.dot_ends = FALSE; else badarg = TRUE;
2676 /* -L: set the identifier used for syslog; equivalent to setting
2677 syslog_processname in the config file, but needs to be an admin option. */
2680 if (*argrest == '\0')
2682 if(++i < argc) argrest = argv[i]; else
2683 { badarg = TRUE; break; }
2685 if ((sz = Ustrlen(argrest)) > 32)
2686 exim_fail("exim: the -L syslog name is too long: \"%s\"\n", argrest);
2688 exim_fail("exim: the -L syslog name is too short\n");
2689 cmdline_syslog_name = argrest;
2693 receiving_message = FALSE;
2695 /* -MC: continue delivery of another message via an existing open
2696 file descriptor. This option is used for an internal call by the
2697 smtp transport when there is a pending message waiting to go to an
2698 address to which it has got a connection. Five subsequent arguments are
2699 required: transport name, host name, IP address, sequence number, and
2700 message_id. Transports may decline to create new processes if the sequence
2701 number gets too big. The channel is stdin. This (-MC) must be the last
2702 argument. There's a subsequent check that the real-uid is privileged.
2704 If we are running in the test harness. delay for a bit, to let the process
2705 that set this one up complete. This makes for repeatability of the logging,
2708 if (Ustrcmp(argrest, "C") == 0)
2710 union sockaddr_46 interface_sock;
2711 EXIM_SOCKLEN_T size = sizeof(interface_sock);
2714 exim_fail("exim: too many or too few arguments after -MC\n");
2716 if (msg_action_arg >= 0)
2717 exim_fail("exim: incompatible arguments\n");
2719 continue_transport = argv[++i];
2720 continue_hostname = argv[++i];
2721 continue_host_address = argv[++i];
2722 continue_sequence = Uatoi(argv[++i]);
2723 msg_action = MSG_DELIVER;
2724 msg_action_arg = ++i;
2725 forced_delivery = TRUE;
2726 queue_run_pid = passed_qr_pid;
2727 queue_run_pipe = passed_qr_pipe;
2729 if (!mac_ismsgid(argv[i]))
2730 exim_fail("exim: malformed message id %s after -MC option\n",
2733 /* Set up $sending_ip_address and $sending_port, unless proxied */
2735 if (!continue_proxy_cipher)
2736 if (getsockname(fileno(stdin), (struct sockaddr *)(&interface_sock),
2738 sending_ip_address = host_ntoa(-1, &interface_sock, NULL,
2741 exim_fail("exim: getsockname() failed after -MC option: %s\n",
2744 testharness_pause_ms(500);
2748 else if (*argrest == 'C' && argrest[1] && !argrest[2])
2752 /* -MCA: set the smtp_authenticated flag; this is useful only when it
2753 precedes -MC (see above). The flag indicates that the host to which
2754 Exim is connected has accepted an AUTH sequence. */
2756 case 'A': f.smtp_authenticated = TRUE; break;
2758 /* -MCD: set the smtp_use_dsn flag; this indicates that the host
2759 that exim is connected to supports the esmtp extension DSN */
2761 case 'D': smtp_peer_options |= OPTION_DSN; break;
2763 /* -MCG: set the queue name, to a non-default value */
2765 case 'G': if (++i < argc) queue_name = string_copy(argv[i]);
2769 /* -MCK: the peer offered CHUNKING. Must precede -MC */
2771 case 'K': smtp_peer_options |= OPTION_CHUNKING; break;
2773 /* -MCP: set the smtp_use_pipelining flag; this is useful only when
2774 it preceded -MC (see above) */
2776 case 'P': smtp_peer_options |= OPTION_PIPE; break;
2778 /* -MCQ: pass on the pid of the queue-running process that started
2779 this chain of deliveries and the fd of its synchronizing pipe; this
2780 is useful only when it precedes -MC (see above) */
2782 case 'Q': if (++i < argc) passed_qr_pid = (pid_t)(Uatol(argv[i]));
2784 if (++i < argc) passed_qr_pipe = (int)(Uatol(argv[i]));
2788 /* -MCS: set the smtp_use_size flag; this is useful only when it
2789 precedes -MC (see above) */
2791 case 'S': smtp_peer_options |= OPTION_SIZE; break;
2794 /* -MCt: similar to -MCT below but the connection is still open
2795 via a proxy process which handles the TLS context and coding.
2796 Require three arguments for the proxied local address and port,
2797 and the TLS cipher. */
2799 case 't': if (++i < argc) sending_ip_address = argv[i];
2801 if (++i < argc) sending_port = (int)(Uatol(argv[i]));
2803 if (++i < argc) continue_proxy_cipher = argv[i];
2807 /* -MCT: set the tls_offered flag; this is useful only when it
2808 precedes -MC (see above). The flag indicates that the host to which
2809 Exim is connected has offered TLS support. */
2811 case 'T': smtp_peer_options |= OPTION_TLS; break;
2814 default: badarg = TRUE; break;
2819 /* -M[x]: various operations on the following list of message ids:
2820 -M deliver the messages, ignoring next retry times and thawing
2821 -Mc deliver the messages, checking next retry times, no thawing
2822 -Mf freeze the messages
2823 -Mg give up on the messages
2824 -Mt thaw the messages
2825 -Mrm remove the messages
2826 In the above cases, this must be the last option. There are also the
2827 following options which are followed by a single message id, and which
2828 act on that message. Some of them use the "recipient" addresses as well.
2829 -Mar add recipient(s)
2830 -Mmad mark all recipients delivered
2831 -Mmd mark recipients(s) delivered
2833 -Mset load a message for use with -be
2835 -Mvc show copy (of whole message, in RFC 2822 format)
2840 else if (*argrest == 0)
2842 msg_action = MSG_DELIVER;
2843 forced_delivery = f.deliver_force_thaw = TRUE;
2845 else if (Ustrcmp(argrest, "ar") == 0)
2847 msg_action = MSG_ADD_RECIPIENT;
2848 one_msg_action = TRUE;
2850 else if (Ustrcmp(argrest, "c") == 0) msg_action = MSG_DELIVER;
2851 else if (Ustrcmp(argrest, "es") == 0)
2853 msg_action = MSG_EDIT_SENDER;
2854 one_msg_action = TRUE;
2856 else if (Ustrcmp(argrest, "f") == 0) msg_action = MSG_FREEZE;
2857 else if (Ustrcmp(argrest, "g") == 0)
2859 msg_action = MSG_DELIVER;
2860 deliver_give_up = TRUE;
2862 else if (Ustrcmp(argrest, "G") == 0)
2864 msg_action = MSG_SETQUEUE;
2865 queue_name_dest = argv[++i];
2867 else if (Ustrcmp(argrest, "mad") == 0)
2869 msg_action = MSG_MARK_ALL_DELIVERED;
2871 else if (Ustrcmp(argrest, "md") == 0)
2873 msg_action = MSG_MARK_DELIVERED;
2874 one_msg_action = TRUE;
2876 else if (Ustrcmp(argrest, "rm") == 0) msg_action = MSG_REMOVE;
2877 else if (Ustrcmp(argrest, "set") == 0)
2879 msg_action = MSG_LOAD;
2880 one_msg_action = TRUE;
2882 else if (Ustrcmp(argrest, "t") == 0) msg_action = MSG_THAW;
2883 else if (Ustrcmp(argrest, "vb") == 0)
2885 msg_action = MSG_SHOW_BODY;
2886 one_msg_action = TRUE;
2888 else if (Ustrcmp(argrest, "vc") == 0)
2890 msg_action = MSG_SHOW_COPY;
2891 one_msg_action = TRUE;
2893 else if (Ustrcmp(argrest, "vh") == 0)
2895 msg_action = MSG_SHOW_HEADER;
2896 one_msg_action = TRUE;
2898 else if (Ustrcmp(argrest, "vl") == 0)
2900 msg_action = MSG_SHOW_LOG;
2901 one_msg_action = TRUE;
2903 else { badarg = TRUE; break; }
2905 /* All the -Mxx options require at least one message id. */
2907 msg_action_arg = i + 1;
2908 if (msg_action_arg >= argc)
2909 exim_fail("exim: no message ids given after %s option\n", arg);
2911 /* Some require only message ids to follow */
2913 if (!one_msg_action)
2915 for (int j = msg_action_arg; j < argc; j++) if (!mac_ismsgid(argv[j]))
2916 exim_fail("exim: malformed message id %s after %s option\n",
2918 goto END_ARG; /* Remaining args are ids */
2921 /* Others require only one message id, possibly followed by addresses,
2922 which will be handled as normal arguments. */
2926 if (!mac_ismsgid(argv[msg_action_arg]))
2927 exim_fail("exim: malformed message id %s after %s option\n",
2928 argv[msg_action_arg], arg);
2934 /* Some programs seem to call the -om option without the leading o;
2935 for sendmail it askes for "me too". Exim always does this. */
2938 if (*argrest != 0) badarg = TRUE;
2942 /* -N: don't do delivery - a debugging option that stops transports doing
2943 their thing. It implies debugging at the D_v level. */
2948 f.dont_deliver = TRUE;
2949 debug_selector |= D_v;
2950 debug_file = stderr;
2956 /* -n: This means "don't alias" in sendmail, apparently.
2957 For normal invocations, it has no effect.
2958 It may affect some other options. */
2964 /* -O: Just ignore it. In sendmail, apparently -O option=value means set
2965 option to the specified value. This form uses long names. We need to handle
2966 -O option=value and -Ooption=value. */
2971 exim_fail("exim: string expected after -O\n");
2977 /* -oA: Set an argument for the bi command (sendmail's "alternate alias
2980 if (!*(alias_arg = argrest))
2981 if (i+1 < argc) alias_arg = argv[++i];
2982 else exim_fail("exim: string expected after -oA\n");
2985 /* -oB: Set a connection message max value for remote deliveries */
2988 uschar * p = argrest;
2990 if (i+1 < argc && isdigit((argv[i+1][0])))
2994 connection_max_messages = 1;
3001 exim_fail("exim: number expected after -oB\n");
3002 connection_max_messages = Uatoi(p);
3007 /* -odb: background delivery */
3010 if (Ustrcmp(argrest, "b") == 0)
3012 f.synchronous_delivery = FALSE;
3013 arg_queue_only = FALSE;
3014 queue_only_set = TRUE;
3017 /* -odd: testsuite-only: add no inter-process delays */
3019 else if (Ustrcmp(argrest, "d") == 0)
3020 f.testsuite_delays = FALSE;
3022 /* -odf: foreground delivery (smail-compatible option); same effect as
3023 -odi: interactive (synchronous) delivery (sendmail-compatible option)
3026 else if (Ustrcmp(argrest, "f") == 0 || Ustrcmp(argrest, "i") == 0)
3028 f.synchronous_delivery = TRUE;
3029 arg_queue_only = FALSE;
3030 queue_only_set = TRUE;
3033 /* -odq: queue only */
3035 else if (Ustrcmp(argrest, "q") == 0)
3037 f.synchronous_delivery = FALSE;
3038 arg_queue_only = TRUE;
3039 queue_only_set = TRUE;
3042 /* -odqs: queue SMTP only - do local deliveries and remote routing,
3043 but no remote delivery */
3045 else if (Ustrcmp(argrest, "qs") == 0)
3047 f.queue_smtp = TRUE;
3048 arg_queue_only = FALSE;
3049 queue_only_set = TRUE;
3054 /* -oex: Sendmail error flags. As these are also accepted without the
3055 leading -o prefix, for compatibility with vacation and other callers,
3056 they are handled with -e above. */
3058 /* -oi: Set flag so dot doesn't end non-SMTP input (same as -i)
3059 -oitrue: Another sendmail syntax for the same */
3062 if (!*argrest || Ustrcmp(argrest, "true") == 0)
3067 /* -oM*: Set various characteristics for an incoming message; actually
3068 acted on for trusted callers only. */
3073 exim_fail("exim: data expected after -oM%s\n", argrest);
3075 /* -oMa: Set sender host address */
3077 if (Ustrcmp(argrest, "a") == 0) sender_host_address = argv[++i];
3079 /* -oMaa: Set authenticator name */
3081 else if (Ustrcmp(argrest, "aa") == 0)
3082 sender_host_authenticated = argv[++i];
3084 /* -oMas: setting authenticated sender */
3086 else if (Ustrcmp(argrest, "as") == 0)
3087 authenticated_sender = string_copy_taint(argv[++i], TRUE);
3089 /* -oMai: setting authenticated id */
3091 else if (Ustrcmp(argrest, "ai") == 0)
3092 authenticated_id = string_copy_taint(argv[++i], TRUE);
3094 /* -oMi: Set incoming interface address */
3096 else if (Ustrcmp(argrest, "i") == 0) interface_address = argv[++i];
3098 /* -oMm: Message reference */
3100 else if (Ustrcmp(argrest, "m") == 0)
3102 if (!mac_ismsgid(argv[i+1]))
3103 exim_fail("-oMm must be a valid message ID\n");
3104 if (!f.trusted_config)
3105 exim_fail("-oMm must be called by a trusted user/config\n");
3106 message_reference = argv[++i];
3109 /* -oMr: Received protocol */
3111 else if (Ustrcmp(argrest, "r") == 0)
3113 if (received_protocol)
3114 exim_fail("received_protocol is set already\n");
3116 received_protocol = argv[++i];
3118 /* -oMs: Set sender host name */
3120 else if (Ustrcmp(argrest, "s") == 0)
3121 sender_host_name = string_copy_taint(argv[++i], TRUE);
3123 /* -oMt: Set sender ident */
3125 else if (Ustrcmp(argrest, "t") == 0)
3127 sender_ident_set = TRUE;
3128 sender_ident = argv[++i];
3131 /* Else a bad argument */
3138 /* -om: Me-too flag for aliases. Exim always does this. Some programs
3139 seem to call this as -m (undocumented), so that is also accepted (see
3141 /* -oo: An ancient flag for old-style addresses which still seems to
3142 crop up in some calls (see in SCO). */
3146 if (*argrest) badarg = TRUE;
3149 /* -oP <name>: set pid file path for daemon
3150 -oPX: delete pid file of daemon */
3153 if (!*argrest) override_pid_file_path = argv[++i];
3154 else if (Ustrcmp(argrest, "X") == 0) delete_pid_file();
3159 /* -or <n>: set timeout for non-SMTP acceptance
3160 -os <n>: set timeout for SMTP acceptance */
3165 int * tp = argrest[-1] == 'r'
3166 ? &arg_receive_timeout : &arg_smtp_receive_timeout;
3168 *tp = readconf_readtime(argrest, 0, FALSE);
3169 else if (i+1 < argc)
3170 *tp = readconf_readtime(argv[++i], 0, FALSE);
3173 exim_fail("exim: bad time value %s: abandoned\n", argv[i]);
3177 /* -oX <list>: Override local_interfaces and/or default daemon ports */
3180 if (*argrest) badarg = TRUE;
3181 else override_local_interfaces = argv[++i];
3184 /* Unknown -o argument */
3192 /* -ps: force Perl startup; -pd force delayed Perl startup */
3196 if (*argrest == 's' && argrest[1] == 0)
3198 perl_start_option = 1;
3201 if (*argrest == 'd' && argrest[1] == 0)
3203 perl_start_option = -1;
3208 /* -panythingelse is taken as the Sendmail-compatible argument -prval:sval,
3209 which sets the host protocol and host name */
3213 argrest = argv[++i];
3215 { badarg = TRUE; break; }
3221 if (received_protocol)
3222 exim_fail("received_protocol is set already\n");
3224 hn = Ustrchr(argrest, ':');
3226 received_protocol = argrest;
3229 int old_pool = store_pool;
3230 store_pool = POOL_PERM;
3231 received_protocol = string_copyn(argrest, hn - argrest);
3232 store_pool = old_pool;
3233 sender_host_name = hn + 1;
3240 receiving_message = FALSE;
3241 if (queue_interval >= 0)
3242 exim_fail("exim: -q specified more than once\n");
3244 /* -qq...: Do queue runs in a 2-stage manner */
3246 if (*argrest == 'q')
3248 f.queue_2stage = TRUE;
3252 /* -qi...: Do only first (initial) deliveries */
3254 if (*argrest == 'i')
3256 f.queue_run_first_delivery = TRUE;
3260 /* -qf...: Run the queue, forcing deliveries
3261 -qff..: Ditto, forcing thawing as well */
3263 if (*argrest == 'f')
3265 f.queue_run_force = TRUE;
3266 if (*++argrest == 'f')
3268 f.deliver_force_thaw = TRUE;
3273 /* -q[f][f]l...: Run the queue only on local deliveries */
3275 if (*argrest == 'l')
3277 f.queue_run_local = TRUE;
3281 /* -q[f][f][l][G<name>]... Work on the named queue */
3283 if (*argrest == 'G')
3286 for (argrest++, i = 0; argrest[i] && argrest[i] != '/'; ) i++;
3287 queue_name = string_copyn(argrest, i);
3289 if (*argrest == '/') argrest++;
3292 /* -q[f][f][l][G<name>]: Run the queue, optionally forced, optionally local
3293 only, optionally named, optionally starting from a given message id. */
3295 if (!(list_queue || count_queue))
3297 && (i + 1 >= argc || argv[i+1][0] == '-' || mac_ismsgid(argv[i+1])))
3300 if (i+1 < argc && mac_ismsgid(argv[i+1]))
3301 start_queue_run_id = argv[++i];
3302 if (i+1 < argc && mac_ismsgid(argv[i+1]))
3303 stop_queue_run_id = argv[++i];
3306 /* -q[f][f][l][G<name>/]<n>: Run the queue at regular intervals, optionally
3307 forced, optionally local only, optionally named. */
3309 else if ((queue_interval = readconf_readtime(*argrest ? argrest : argv[++i],
3311 exim_fail("exim: bad time value %s: abandoned\n", argv[i]);
3315 case 'R': /* Synonymous with -qR... */
3316 receiving_message = FALSE;
3318 /* -Rf: As -R (below) but force all deliveries,
3319 -Rff: Ditto, but also thaw all frozen messages,
3320 -Rr: String is regex
3321 -Rrf: Regex and force
3322 -Rrff: Regex and force and thaw
3324 in all cases provided there are no further characters in this
3328 for (int i = 0; i < nelem(rsopts); i++)
3329 if (Ustrcmp(argrest, rsopts[i]) == 0)
3331 if (i != 2) f.queue_run_force = TRUE;
3332 if (i >= 2) f.deliver_selectstring_regex = TRUE;
3333 if (i == 1 || i == 4) f.deliver_force_thaw = TRUE;
3334 argrest += Ustrlen(rsopts[i]);
3337 /* -R: Set string to match in addresses for forced queue run to
3338 pick out particular messages. */
3341 deliver_selectstring = argrest;
3342 else if (i+1 < argc)
3343 deliver_selectstring = argv[++i];
3345 exim_fail("exim: string expected after -R\n");
3349 /* -r: an obsolete synonym for -f (see above) */
3352 /* -S: Like -R but works on sender. */
3354 case 'S': /* Synonymous with -qS... */
3355 receiving_message = FALSE;
3357 /* -Sf: As -S (below) but force all deliveries,
3358 -Sff: Ditto, but also thaw all frozen messages,
3359 -Sr: String is regex
3360 -Srf: Regex and force
3361 -Srff: Regex and force and thaw
3363 in all cases provided there are no further characters in this
3367 for (int i = 0; i < nelem(rsopts); i++)
3368 if (Ustrcmp(argrest, rsopts[i]) == 0)
3370 if (i != 2) f.queue_run_force = TRUE;
3371 if (i >= 2) f.deliver_selectstring_sender_regex = TRUE;
3372 if (i == 1 || i == 4) f.deliver_force_thaw = TRUE;
3373 argrest += Ustrlen(rsopts[i]);
3376 /* -S: Set string to match in addresses for forced queue run to
3377 pick out particular messages. */
3380 deliver_selectstring_sender = argrest;
3381 else if (i+1 < argc)
3382 deliver_selectstring_sender = argv[++i];
3384 exim_fail("exim: string expected after -S\n");
3387 /* -Tqt is an option that is exclusively for use by the testing suite.
3388 It is not recognized in other circumstances. It allows for the setting up
3389 of explicit "queue times" so that various warning/retry things can be
3390 tested. Otherwise variability of clock ticks etc. cause problems. */
3393 if (f.running_in_test_harness && Ustrcmp(argrest, "qt") == 0)
3394 fudged_queue_times = argv[++i];
3399 /* -t: Set flag to extract recipients from body of message. */
3402 if (*argrest == 0) extract_recipients = TRUE;
3404 /* -ti: Set flag to extract recipients from body of message, and also
3405 specify that dot does not end the message. */
3407 else if (Ustrcmp(argrest, "i") == 0)
3409 extract_recipients = TRUE;
3413 /* -tls-on-connect: don't wait for STARTTLS (for old clients) */
3416 else if (Ustrcmp(argrest, "ls-on-connect") == 0) tls_in.on_connect = TRUE;
3423 /* -U: This means "initial user submission" in sendmail, apparently. The
3424 doc claims that in future sendmail may refuse syntactically invalid
3425 messages instead of fixing them. For the moment, we just ignore it. */
3431 /* -v: verify things - this is a very low-level debugging */
3436 debug_selector |= D_v;
3437 debug_file = stderr;
3443 /* -x: AIX uses this to indicate some fancy 8-bit character stuff:
3445 The -x flag tells the sendmail command that mail from a local
3446 mail program has National Language Support (NLS) extended characters
3447 in the body of the mail item. The sendmail command can send mail with
3448 extended NLS characters across networks that normally corrupts these
3451 As Exim is 8-bit clean, it just ignores this flag. */
3454 if (*argrest != 0) badarg = TRUE;
3457 /* -X: in sendmail: takes one parameter, logfile, and sends debugging
3458 logs to that file. We swallow the parameter and otherwise ignore it. */
3461 if (*argrest == '\0')
3463 exim_fail("exim: string expected after -X\n");
3467 if (*argrest == '\0')
3469 log_oneline = argv[i];
3471 exim_fail("exim: file name expected after %s\n", argv[i-1]);
3474 /* All other initial characters are errors */
3479 } /* End of high-level switch statement */
3481 /* Failed to recognize the option, or syntax error */
3484 exim_fail("exim abandoned: unknown, malformed, or incomplete "
3485 "option %s\n", arg);
3489 /* If -R or -S have been specified without -q, assume a single queue run. */
3491 if ( (deliver_selectstring || deliver_selectstring_sender)
3492 && queue_interval < 0)
3497 /* If usage_wanted is set we call the usage function - which never returns */
3498 if (usage_wanted) exim_usage(called_as);
3500 /* Arguments have been processed. Check for incompatibilities. */
3502 (smtp_input || extract_recipients || recipients_arg < argc) &&
3503 (f.daemon_listen || queue_interval >= 0 || bi_option ||
3504 test_retry_arg >= 0 || test_rewrite_arg >= 0 ||
3505 filter_test != FTEST_NONE || (msg_action_arg > 0 && !one_msg_action))
3508 msg_action_arg > 0 &&
3509 (f.daemon_listen || queue_interval > 0 || list_options ||
3510 (checking && msg_action != MSG_LOAD) ||
3511 bi_option || test_retry_arg >= 0 || test_rewrite_arg >= 0)
3514 (f.daemon_listen || queue_interval > 0) &&
3515 (sender_address != NULL || list_options || list_queue || checking ||
3519 f.daemon_listen && queue_interval == 0
3522 f.inetd_wait_mode && queue_interval >= 0
3526 (checking || smtp_input || extract_recipients ||
3527 filter_test != FTEST_NONE || bi_option)
3530 verify_address_mode &&
3531 (f.address_test_mode || smtp_input || extract_recipients ||
3532 filter_test != FTEST_NONE || bi_option)
3535 f.address_test_mode && (smtp_input || extract_recipients ||
3536 filter_test != FTEST_NONE || bi_option)
3539 smtp_input && (sender_address != NULL || filter_test != FTEST_NONE ||
3543 deliver_selectstring != NULL && queue_interval < 0
3546 msg_action == MSG_LOAD &&
3547 (!expansion_test || expansion_test_message != NULL)
3550 exim_fail("exim: incompatible command-line options or arguments\n");
3552 /* If debugging is set up, set the file and the file descriptor to pass on to
3553 child processes. It should, of course, be 2 for stderr. Also, force the daemon
3554 to run in the foreground. */
3556 if (debug_selector != 0)
3558 debug_file = stderr;
3559 debug_fd = fileno(debug_file);
3560 f.background_daemon = FALSE;
3561 testharness_pause_ms(100); /* lets caller finish */
3562 if (debug_selector != D_v) /* -v only doesn't show this */
3564 debug_printf("Exim version %s uid=%ld gid=%ld pid=%d D=%x\n",
3565 version_string, (long int)real_uid, (long int)real_gid, (int)getpid(),
3567 if (!version_printed)
3568 show_whats_supported(stderr);
3572 /* When started with root privilege, ensure that the limits on the number of
3573 open files and the number of processes (where that is accessible) are
3574 sufficiently large, or are unset, in case Exim has been called from an
3575 environment where the limits are screwed down. Not all OS have the ability to
3576 change some of these limits. */
3580 DEBUG(D_any) debug_print_ids(US"Exim has no root privilege:");
3586 #ifdef RLIMIT_NOFILE
3587 if (getrlimit(RLIMIT_NOFILE, &rlp) < 0)
3589 log_write(0, LOG_MAIN|LOG_PANIC, "getrlimit(RLIMIT_NOFILE) failed: %s",
3591 rlp.rlim_cur = rlp.rlim_max = 0;
3594 /* I originally chose 1000 as a nice big number that was unlikely to
3595 be exceeded. It turns out that some older OS have a fixed upper limit of
3598 if (rlp.rlim_cur < 1000)
3600 rlp.rlim_cur = rlp.rlim_max = 1000;
3601 if (setrlimit(RLIMIT_NOFILE, &rlp) < 0)
3603 rlp.rlim_cur = rlp.rlim_max = 256;
3604 if (setrlimit(RLIMIT_NOFILE, &rlp) < 0)
3605 log_write(0, LOG_MAIN|LOG_PANIC, "setrlimit(RLIMIT_NOFILE) failed: %s",
3612 if (getrlimit(RLIMIT_NPROC, &rlp) < 0)
3614 log_write(0, LOG_MAIN|LOG_PANIC, "getrlimit(RLIMIT_NPROC) failed: %s",
3616 rlp.rlim_cur = rlp.rlim_max = 0;
3619 #ifdef RLIM_INFINITY
3620 if (rlp.rlim_cur != RLIM_INFINITY && rlp.rlim_cur < 1000)
3622 rlp.rlim_cur = rlp.rlim_max = RLIM_INFINITY;
3624 if (rlp.rlim_cur < 1000)
3626 rlp.rlim_cur = rlp.rlim_max = 1000;
3628 if (setrlimit(RLIMIT_NPROC, &rlp) < 0)
3629 log_write(0, LOG_MAIN|LOG_PANIC, "setrlimit(RLIMIT_NPROC) failed: %s",
3635 /* Exim is normally entered as root (but some special configurations are
3636 possible that don't do this). However, it always spins off sub-processes that
3637 set their uid and gid as required for local delivery. We don't want to pass on
3638 any extra groups that root may belong to, so we want to get rid of them all at
3641 We need to obey setgroups() at this stage, before possibly giving up root
3642 privilege for a changed configuration file, but later on we might need to
3643 check on the additional groups for the admin user privilege - can't do that
3644 till after reading the config, which might specify the exim gid. Therefore,
3645 save the group list here first. */
3647 if ((group_count = getgroups(nelem(group_list), group_list)) < 0)
3648 exim_fail("exim: getgroups() failed: %s\n", strerror(errno));
3650 /* There is a fundamental difference in some BSD systems in the matter of
3651 groups. FreeBSD and BSDI are known to be different; NetBSD and OpenBSD are
3652 known not to be different. On the "different" systems there is a single group
3653 list, and the first entry in it is the current group. On all other versions of
3654 Unix there is a supplementary group list, which is in *addition* to the current
3655 group. Consequently, to get rid of all extraneous groups on a "standard" system
3656 you pass over 0 groups to setgroups(), while on a "different" system you pass
3657 over a single group - the current group, which is always the first group in the
3658 list. Calling setgroups() with zero groups on a "different" system results in
3659 an error return. The following code should cope with both types of system.
3661 Unfortunately, recent MacOS, which should be a FreeBSD, "helpfully" succeeds
3662 the "setgroups() with zero groups" - and changes the egid.
3663 Thanks to that we had to stash the original_egid above, for use below
3664 in the call to exim_setugid().
3666 However, if this process isn't running as root, setgroups() can't be used
3667 since you have to be root to run it, even if throwing away groups.
3668 Except, sigh, for Hurd - where you can.
3669 Not being root here happens only in some unusual configurations. */
3672 #ifndef OS_SETGROUPS_ZERO_DROPS_ALL
3673 && setgroups(0, NULL) != 0
3675 && setgroups(1, group_list) != 0)
3676 exim_fail("exim: setgroups() failed: %s\n", strerror(errno));
3678 /* If the configuration file name has been altered by an argument on the
3679 command line (either a new file name or a macro definition) and the caller is
3680 not root, or if this is a filter testing run, remove any setuid privilege the
3681 program has and run as the underlying user.
3683 The exim user is locked out of this, which severely restricts the use of -C
3686 Otherwise, set the real ids to the effective values (should be root unless run
3687 from inetd, which it can either be root or the exim uid, if one is configured).
3689 There is a private mechanism for bypassing some of this, in order to make it
3690 possible to test lots of configurations automatically, without having either to
3691 recompile each time, or to patch in an actual configuration file name and other
3692 values (such as the path name). If running in the test harness, pretend that
3693 configuration file changes and macro definitions haven't happened. */
3696 (!f.trusted_config || /* Config changed, or */
3697 !macros_trusted(opt_D_used)) && /* impermissible macros and */
3698 real_uid != root_uid && /* Not root, and */
3699 !f.running_in_test_harness /* Not fudged */
3701 expansion_test /* expansion testing */
3703 filter_test != FTEST_NONE) /* Filter testing */
3705 setgroups(group_count, group_list);
3706 exim_setugid(real_uid, real_gid, FALSE,
3707 US"-C, -D, -be or -bf forces real uid");
3708 removed_privilege = TRUE;
3710 /* In the normal case when Exim is called like this, stderr is available
3711 and should be used for any logging information because attempts to write
3712 to the log will usually fail. To arrange this, we unset really_exim. However,
3713 if no stderr is available there is no point - we might as well have a go
3714 at the log (if it fails, syslog will be written).
3716 Note that if the invoker is Exim, the logs remain available. Messing with
3717 this causes unlogged successful deliveries. */
3719 if (log_stderr && real_uid != exim_uid)
3720 f.really_exim = FALSE;
3723 /* Privilege is to be retained for the moment. It may be dropped later,
3724 depending on the job that this Exim process has been asked to do. For now, set
3725 the real uid to the effective so that subsequent re-execs of Exim are done by a
3729 exim_setugid(geteuid(), original_egid, FALSE, US"forcing real = effective");
3731 /* If testing a filter, open the file(s) now, before wasting time doing other
3732 setups and reading the message. */
3734 if (filter_test & FTEST_SYSTEM)
3735 if ((filter_sfd = Uopen(filter_test_sfile, O_RDONLY, 0)) < 0)
3736 exim_fail("exim: failed to open %s: %s\n", filter_test_sfile,
3739 if (filter_test & FTEST_USER)
3740 if ((filter_ufd = Uopen(filter_test_ufile, O_RDONLY, 0)) < 0)
3741 exim_fail("exim: failed to open %s: %s\n", filter_test_ufile,
3744 /* Initialise lookup_list
3745 If debugging, already called above via version reporting.
3746 In either case, we initialise the list of available lookups while running
3747 as root. All dynamically modules are loaded from a directory which is
3748 hard-coded into the binary and is code which, if not a module, would be
3749 part of Exim already. Ability to modify the content of the directory
3750 is equivalent to the ability to modify a setuid binary!
3752 This needs to happen before we read the main configuration. */
3756 if (f.running_in_test_harness) smtputf8_advertise_hosts = NULL;
3759 /* Read the main runtime configuration data; this gives up if there
3760 is a failure. It leaves the configuration file open so that the subsequent
3761 configuration data for delivery can be read if needed.
3763 NOTE: immediately after opening the configuration file we change the working
3764 directory to "/"! Later we change to $spool_directory. We do it there, because
3765 during readconf_main() some expansion takes place already. */
3767 /* Store the initial cwd before we change directories. Can be NULL if the
3768 dir has already been unlinked. */
3769 initial_cwd = os_getcwd(NULL, 0);
3772 -be[m] expansion test -
3773 -b[fF] filter test new
3775 -bmalware malware_test_file new
3777 -brw rewrite test new
3779 -bv[s] address verify -
3781 -bP <option> (except -bP config, which sets list_config)
3783 If any of these options is set, we suppress warnings about configuration
3784 issues (currently about tls_advertise_hosts and keep_environment not being
3788 #ifdef MEASURE_TIMING
3789 struct timeval t0, diff;
3790 (void)gettimeofday(&t0, NULL);
3793 readconf_main(checking || list_options);
3795 #ifdef MEASURE_TIMING
3796 report_time_since(&t0, US"readconf_main (delta)");
3801 /* Now in directory "/" */
3803 if (cleanup_environment() == FALSE)
3804 log_write(0, LOG_PANIC_DIE, "Can't cleanup environment");
3807 /* If an action on specific messages is requested, or if a daemon or queue
3808 runner is being started, we need to know if Exim was called by an admin user.
3809 This is the case if the real user is root or exim, or if the real group is
3810 exim, or if one of the supplementary groups is exim or a group listed in
3811 admin_groups. We don't fail all message actions immediately if not admin_user,
3812 since some actions can be performed by non-admin users. Instead, set admin_user
3813 for later interrogation. */
3815 if (real_uid == root_uid || real_uid == exim_uid || real_gid == exim_gid)
3816 f.admin_user = TRUE;
3818 for (int i = 0; i < group_count && !f.admin_user; i++)
3819 if (group_list[i] == exim_gid)
3820 f.admin_user = TRUE;
3821 else if (admin_groups)
3822 for (int j = 1; j <= (int)admin_groups[0] && !f.admin_user; j++)
3823 if (admin_groups[j] == group_list[i])
3824 f.admin_user = TRUE;
3826 /* Another group of privileged users are the trusted users. These are root,
3827 exim, and any caller matching trusted_users or trusted_groups. Trusted callers
3828 are permitted to specify sender_addresses with -f on the command line, and
3829 other message parameters as well. */
3831 if (real_uid == root_uid || real_uid == exim_uid)
3832 f.trusted_caller = TRUE;
3836 for (int i = 1; i <= (int)trusted_users[0] && !f.trusted_caller; i++)
3837 if (trusted_users[i] == real_uid)
3838 f.trusted_caller = TRUE;
3841 for (int i = 1; i <= (int)trusted_groups[0] && !f.trusted_caller; i++)
3842 if (trusted_groups[i] == real_gid)
3843 f.trusted_caller = TRUE;
3844 else for (int j = 0; j < group_count && !f.trusted_caller; j++)
3845 if (trusted_groups[i] == group_list[j])
3846 f.trusted_caller = TRUE;
3849 /* At this point, we know if the user is privileged and some command-line
3850 options become possibly impermissible, depending upon the configuration file. */
3852 if (checking && commandline_checks_require_admin && !f.admin_user)
3853 exim_fail("exim: those command-line flags are set to require admin\n");
3855 /* Handle the decoding of logging options. */
3857 decode_bits(log_selector, log_selector_size, log_notall,
3858 log_selector_string, log_options, log_options_count, US"log", 0);
3862 debug_printf("configuration file is %s\n", config_main_filename);
3863 debug_printf("log selectors =");
3864 for (int i = 0; i < log_selector_size; i++)
3865 debug_printf(" %08x", log_selector[i]);
3869 /* If domain literals are not allowed, check the sender address that was
3870 supplied with -f. Ditto for a stripped trailing dot. */
3874 if (sender_address[sender_address_domain] == '[' && !allow_domain_literals)
3875 exim_fail("exim: bad -f address \"%s\": domain literals not "
3876 "allowed\n", sender_address);
3877 if (f_end_dot && !strip_trailing_dot)
3878 exim_fail("exim: bad -f address \"%s.\": domain is malformed "
3879 "(trailing dot not allowed)\n", sender_address);
3882 /* See if an admin user overrode our logging. */
3884 if (cmdline_syslog_name)
3887 syslog_processname = cmdline_syslog_name;
3888 log_file_path = string_copy(CUS"syslog");
3891 /* not a panic, non-privileged users should not be able to spam paniclog */
3893 "exim: you lack sufficient privilege to specify syslog process name\n");
3895 /* Paranoia check of maximum lengths of certain strings. There is a check
3896 on the length of the log file path in log.c, which will come into effect
3897 if there are any calls to write the log earlier than this. However, if we
3898 get this far but the string is very long, it is better to stop now than to
3899 carry on and (e.g.) receive a message and then have to collapse. The call to
3900 log_write() from here will cause the ultimate panic collapse if the complete
3901 file name exceeds the buffer length. */
3903 if (Ustrlen(log_file_path) > 200)
3904 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3905 "log_file_path is longer than 200 chars: aborting");
3907 if (Ustrlen(pid_file_path) > 200)
3908 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3909 "pid_file_path is longer than 200 chars: aborting");
3911 if (Ustrlen(spool_directory) > 200)
3912 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3913 "spool_directory is longer than 200 chars: aborting");
3915 /* Length check on the process name given to syslog for its TAG field,
3916 which is only permitted to be 32 characters or less. See RFC 3164. */
3918 if (Ustrlen(syslog_processname) > 32)
3919 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3920 "syslog_processname is longer than 32 chars: aborting");
3925 log_write(0, LOG_MAIN, "%s", log_oneline);
3926 return EXIT_SUCCESS;
3929 return EXIT_FAILURE;
3931 /* In some operating systems, the environment variable TMPDIR controls where
3932 temporary files are created; Exim doesn't use these (apart from when delivering
3933 to MBX mailboxes), but called libraries such as DBM libraries may require them.
3934 If TMPDIR is found in the environment, reset it to the value defined in the
3935 EXIM_TMPDIR macro, if this macro is defined. For backward compatibility this
3936 macro may be called TMPDIR in old "Local/Makefile"s. It's converted to
3937 EXIM_TMPDIR by the build scripts.
3941 if (environ) for (uschar ** p = USS environ; *p; p++)
3942 if (Ustrncmp(*p, "TMPDIR=", 7) == 0 && Ustrcmp(*p+7, EXIM_TMPDIR) != 0)
3944 uschar * newp = store_malloc(Ustrlen(EXIM_TMPDIR) + 8);
3945 sprintf(CS newp, "TMPDIR=%s", EXIM_TMPDIR);
3947 DEBUG(D_any) debug_printf("reset TMPDIR=%s in environment\n", EXIM_TMPDIR);
3951 /* Timezone handling. If timezone_string is "utc", set a flag to cause all
3952 timestamps to be in UTC (gmtime() is used instead of localtime()). Otherwise,
3953 we may need to get rid of a bogus timezone setting. This can arise when Exim is
3954 called by a user who has set the TZ variable. This then affects the timestamps
3955 in log files and in Received: headers, and any created Date: header lines. The
3956 required timezone is settable in the configuration file, so nothing can be done
3957 about this earlier - but hopefully nothing will normally be logged earlier than
3958 this. We have to make a new environment if TZ is wrong, but don't bother if
3959 timestamps_utc is set, because then all times are in UTC anyway. */
3961 if (timezone_string && strcmpic(timezone_string, US"UTC") == 0)
3962 f.timestamps_utc = TRUE;
3965 uschar *envtz = US getenv("TZ");
3967 ? !timezone_string || Ustrcmp(timezone_string, envtz) != 0
3968 : timezone_string != NULL
3971 uschar **p = USS environ;
3975 if (environ) while (*p++) count++;
3976 if (!envtz) count++;
3977 newp = new = store_malloc(sizeof(uschar *) * (count + 1));
3978 if (environ) for (p = USS environ; *p; p++)
3979 if (Ustrncmp(*p, "TZ=", 3) != 0) *newp++ = *p;
3980 if (timezone_string)
3982 *newp = store_malloc(Ustrlen(timezone_string) + 4);
3983 sprintf(CS *newp++, "TZ=%s", timezone_string);
3988 DEBUG(D_any) debug_printf("Reset TZ to %s: time is %s\n", timezone_string,
3989 tod_stamp(tod_log));
3993 /* Handle the case when we have removed the setuid privilege because of -C or
3994 -D. This means that the caller of Exim was not root.
3996 There is a problem if we were running as the Exim user. The sysadmin may
3997 expect this case to retain privilege because "the binary was called by the
3998 Exim user", but it hasn't, because either the -D option set macros, or the
3999 -C option set a non-trusted configuration file. There are two possibilities:
4001 (1) If deliver_drop_privilege is set, Exim is not going to re-exec in order
4002 to do message deliveries. Thus, the fact that it is running as a
4003 non-privileged user is plausible, and might be wanted in some special
4004 configurations. However, really_exim will have been set false when
4005 privilege was dropped, to stop Exim trying to write to its normal log
4006 files. Therefore, re-enable normal log processing, assuming the sysadmin
4007 has set up the log directory correctly.
4009 (2) If deliver_drop_privilege is not set, the configuration won't work as
4010 apparently intended, and so we log a panic message. In order to retain
4011 root for -C or -D, the caller must either be root or be invoking a
4012 trusted configuration file (when deliver_drop_privilege is false). */
4014 if ( removed_privilege
4015 && (!f.trusted_config || opt_D_used)
4016 && real_uid == exim_uid)
4017 if (deliver_drop_privilege)
4018 f.really_exim = TRUE; /* let logging work normally */
4020 log_write(0, LOG_MAIN|LOG_PANIC,
4021 "exim user lost privilege for using %s option",
4022 f.trusted_config? "-D" : "-C");
4024 /* Start up Perl interpreter if Perl support is configured and there is a
4025 perl_startup option, and the configuration or the command line specifies
4026 initializing starting. Note that the global variables are actually called
4027 opt_perl_xxx to avoid clashing with perl's namespace (perl_*). */
4030 if (perl_start_option != 0)
4031 opt_perl_at_start = (perl_start_option > 0);
4032 if (opt_perl_at_start && opt_perl_startup != NULL)
4035 DEBUG(D_any) debug_printf("Starting Perl interpreter\n");
4036 if ((errstr = init_perl(opt_perl_startup)))
4037 exim_fail("exim: error in perl_startup code: %s\n", errstr);
4038 opt_perl_started = TRUE;
4040 #endif /* EXIM_PERL */
4042 /* Log the arguments of the call if the configuration file said so. This is
4043 a debugging feature for finding out what arguments certain MUAs actually use.
4044 Don't attempt it if logging is disabled, or if listing variables or if
4045 verifying/testing addresses or expansions. */
4047 if ( (debug_selector & D_any || LOGGING(arguments))
4048 && f.really_exim && !list_options && !checking)
4050 uschar *p = big_buffer;
4051 Ustrcpy(p, US"cwd= (failed)");
4057 Ustrncpy(p + 4, initial_cwd, big_buffer_size-5);
4058 p += 4 + Ustrlen(initial_cwd);
4059 /* in case p is near the end and we don't provide enough space for
4060 * string_format to be willing to write. */
4064 (void)string_format(p, big_buffer_size - (p - big_buffer), " %d args:", argc);
4066 for (int i = 0; i < argc; i++)
4068 int len = Ustrlen(argv[i]);
4069 const uschar *printing;
4071 if (p + len + 8 >= big_buffer + big_buffer_size)
4073 Ustrcpy(p, US" ...");
4074 log_write(0, LOG_MAIN, "%s", big_buffer);
4075 Ustrcpy(big_buffer, US"...");
4078 printing = string_printing(argv[i]);
4079 if (printing[0] == 0) quote = US"\""; else
4081 const uschar *pp = printing;
4083 while (*pp != 0) if (isspace(*pp++)) { quote = US"\""; break; }
4085 p += sprintf(CS p, " %s%.*s%s", quote, (int)(big_buffer_size -
4086 (p - big_buffer) - 4), printing, quote);
4089 if (LOGGING(arguments))
4090 log_write(0, LOG_MAIN, "%s", big_buffer);
4092 debug_printf("%s\n", big_buffer);
4095 /* Set the working directory to be the top-level spool directory. We don't rely
4096 on this in the code, which always uses fully qualified names, but it's useful
4097 for core dumps etc. Don't complain if it fails - the spool directory might not
4098 be generally accessible and calls with the -C option (and others) have lost
4099 privilege by now. Before the chdir, we try to ensure that the directory exists.
4102 if (Uchdir(spool_directory) != 0)
4105 (void)directory_make(spool_directory, US"", SPOOL_DIRECTORY_MODE, FALSE);
4106 dummy = /* quieten compiler */ Uchdir(spool_directory);
4107 dummy = dummy; /* yet more compiler quietening, sigh */
4110 /* Handle calls with the -bi option. This is a sendmail option to rebuild *the*
4111 alias file. Exim doesn't have such a concept, but this call is screwed into
4112 Sun's YP makefiles. Handle this by calling a configured script, as the real
4113 user who called Exim. The -oA option can be used to pass an argument to the
4118 (void)fclose(config_file);
4119 if (bi_command != NULL)
4123 argv[i++] = bi_command;
4124 if (alias_arg != NULL) argv[i++] = alias_arg;
4127 setgroups(group_count, group_list);
4128 exim_setugid(real_uid, real_gid, FALSE, US"running bi_command");
4130 DEBUG(D_exec) debug_printf("exec %.256s %.256s\n", argv[0],
4131 (argv[1] == NULL)? US"" : argv[1]);
4133 execv(CS argv[0], (char *const *)argv);
4134 exim_fail("exim: exec failed: %s\n", strerror(errno));
4138 DEBUG(D_any) debug_printf("-bi used but bi_command not set; exiting\n");
4143 /* We moved the admin/trusted check to be immediately after reading the
4144 configuration file. We leave these prints here to ensure that syslog setup,
4145 logfile setup, and so on has already happened. */
4147 if (f.trusted_caller) DEBUG(D_any) debug_printf("trusted user\n");
4148 if (f.admin_user) DEBUG(D_any) debug_printf("admin user\n");
4150 /* Only an admin user may start the daemon or force a queue run in the default
4151 configuration, but the queue run restriction can be relaxed. Only an admin
4152 user may request that a message be returned to its sender forthwith. Only an
4153 admin user may specify a debug level greater than D_v (because it might show
4154 passwords, etc. in lookup queries). Only an admin user may request a queue
4155 count. Only an admin user can use the test interface to scan for email
4156 (because Exim will be in the spool dir and able to look at mails). */
4160 BOOL debugset = (debug_selector & ~D_v) != 0;
4161 if ( deliver_give_up || f.daemon_listen || malware_test_file
4162 || count_queue && queue_list_requires_admin
4163 || list_queue && queue_list_requires_admin
4164 || queue_interval >= 0 && prod_requires_admin
4165 || queue_name_dest && prod_requires_admin
4166 || debugset && !f.running_in_test_harness
4168 exim_fail("exim:%s permission denied\n", debugset? " debugging" : "");
4171 /* If the real user is not root or the exim uid, the argument for passing
4172 in an open TCP/IP connection for another message is not permitted, nor is
4173 running with the -N option for any delivery action, unless this call to exim is
4174 one that supplied an input message, or we are using a patched exim for
4175 regression testing. */
4177 if (real_uid != root_uid && real_uid != exim_uid &&
4178 (continue_hostname != NULL ||
4180 (queue_interval >= 0 || f.daemon_listen || msg_action_arg > 0)
4181 )) && !f.running_in_test_harness)
4182 exim_fail("exim: Permission denied\n");
4184 /* If the caller is not trusted, certain arguments are ignored when running for
4185 real, but are permitted when checking things (-be, -bv, -bt, -bh, -bf, -bF).
4186 Note that authority for performing certain actions on messages is tested in the
4187 queue_action() function. */
4189 if (!f.trusted_caller && !checking)
4191 sender_host_name = sender_host_address = interface_address =
4192 sender_ident = received_protocol = NULL;
4193 sender_host_port = interface_port = 0;
4194 sender_host_authenticated = authenticated_sender = authenticated_id = NULL;
4197 /* If a sender host address is set, extract the optional port number off the
4198 end of it and check its syntax. Do the same thing for the interface address.
4199 Exim exits if the syntax is bad. */
4203 if (sender_host_address != NULL)
4204 sender_host_port = check_port(sender_host_address);
4205 if (interface_address != NULL)
4206 interface_port = check_port(interface_address);
4209 /* If the caller is trusted, then they can use -G to suppress_local_fixups. */
4212 if (f.trusted_caller)
4214 f.suppress_local_fixups = f.suppress_local_fixups_default = TRUE;
4215 DEBUG(D_acl) debug_printf("suppress_local_fixups forced on by -G\n");
4218 exim_fail("exim: permission denied (-G requires a trusted user)\n");
4221 /* If an SMTP message is being received check to see if the standard input is a
4222 TCP/IP socket. If it is, we assume that Exim was called from inetd if the
4223 caller is root or the Exim user, or if the port is a privileged one. Otherwise,
4228 union sockaddr_46 inetd_sock;
4229 EXIM_SOCKLEN_T size = sizeof(inetd_sock);
4230 if (getpeername(0, (struct sockaddr *)(&inetd_sock), &size) == 0)
4232 int family = ((struct sockaddr *)(&inetd_sock))->sa_family;
4233 if (family == AF_INET || family == AF_INET6)
4235 union sockaddr_46 interface_sock;
4236 size = sizeof(interface_sock);
4238 if (getsockname(0, (struct sockaddr *)(&interface_sock), &size) == 0)
4239 interface_address = host_ntoa(-1, &interface_sock, NULL,
4242 if (host_is_tls_on_connect_port(interface_port)) tls_in.on_connect = TRUE;
4244 if (real_uid == root_uid || real_uid == exim_uid || interface_port < 1024)
4247 sender_host_address = host_ntoa(-1, (struct sockaddr *)(&inetd_sock),
4248 NULL, &sender_host_port);
4249 if (mua_wrapper) log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Input from "
4250 "inetd is not supported when mua_wrapper is set");
4254 "exim: Permission denied (unprivileged user, unprivileged port)\n");
4259 /* If the load average is going to be needed while receiving a message, get it
4260 now for those OS that require the first call to os_getloadavg() to be done as
4261 root. There will be further calls later for each message received. */
4263 #ifdef LOAD_AVG_NEEDS_ROOT
4264 if ( receiving_message
4265 && (queue_only_load >= 0 || (f.is_inetd && smtp_load_reserve >= 0)))
4266 load_average = OS_GETLOADAVG();
4269 /* The queue_only configuration option can be overridden by -odx on the command
4270 line, except that if queue_only_override is false, queue_only cannot be unset
4271 from the command line. */
4273 if (queue_only_set && (queue_only_override || arg_queue_only))
4274 queue_only = arg_queue_only;
4276 /* The receive_timeout and smtp_receive_timeout options can be overridden by
4279 if (arg_receive_timeout >= 0) receive_timeout = arg_receive_timeout;
4280 if (arg_smtp_receive_timeout >= 0)
4281 smtp_receive_timeout = arg_smtp_receive_timeout;
4283 /* If Exim was started with root privilege, unless we have already removed the
4284 root privilege above as a result of -C, -D, -be, -bf or -bF, remove it now
4285 except when starting the daemon or doing some kind of delivery or address
4286 testing (-bt). These are the only cases when root need to be retained. We run
4287 as exim for -bv and -bh. However, if deliver_drop_privilege is set, root is
4288 retained only for starting the daemon. We always do the initgroups() in this
4289 situation (controlled by the TRUE below), in order to be as close as possible
4290 to the state Exim usually runs in. */
4292 if (!unprivileged && /* originally had root AND */
4293 !removed_privilege && /* still got root AND */
4294 !f.daemon_listen && /* not starting the daemon */
4295 queue_interval <= 0 && /* (either kind of daemon) */
4297 deliver_drop_privilege || /* requested unprivileged */
4299 queue_interval < 0 && /* not running the queue */
4300 (msg_action_arg < 0 || /* and */
4301 msg_action != MSG_DELIVER) && /* not delivering and */
4302 (!checking || !f.address_test_mode) /* not address checking */
4304 exim_setugid(exim_uid, exim_gid, TRUE, US"privilege not needed");
4306 /* When we are retaining a privileged uid, we still change to the exim gid. */
4311 DEBUG(D_any) debug_printf("dropping to exim gid; retaining priv uid\n");
4312 rv = setgid(exim_gid);
4313 /* Impact of failure is that some stuff might end up with an incorrect group.
4314 We track this for failures from root, since any attempt to change privilege
4315 by root should succeed and failures should be examined. For non-root,
4316 there's no security risk. For me, it's { exim -bV } on a just-built binary,
4317 no need to complain then. */
4319 if (!(unprivileged || removed_privilege))
4320 exim_fail("exim: changing group failed: %s\n", strerror(errno));
4322 DEBUG(D_any) debug_printf("changing group to %ld failed: %s\n",
4323 (long int)exim_gid, strerror(errno));
4326 /* Handle a request to scan a file for malware */
4327 if (malware_test_file)
4329 #ifdef WITH_CONTENT_SCAN
4331 set_process_info("scanning file for malware");
4332 result = malware_in_file(malware_test_file);
4335 printf("No malware found.\n");
4340 printf("Malware lookup returned non-okay/fail: %d\n", result);
4344 printf("Malware found: %s\n", malware_name);
4346 printf("Malware scan detected malware of unknown name.\n");
4348 printf("Malware scanning not enabled at compile time.\n");
4353 /* Handle a request to list the delivery queue */
4357 set_process_info("listing the queue");
4358 queue_list(list_queue_option, argv + recipients_arg, argc - recipients_arg);
4362 /* Handle a request to count the delivery queue */
4366 set_process_info("counting the queue");
4367 fprintf(stdout, "%u\n", queue_count());
4371 /* Handle actions on specific messages, except for the force delivery and
4372 message load actions, which are done below. Some actions take a whole list of
4373 message ids, which are known to continue up to the end of the arguments. Others
4374 take a single message id and then operate on the recipients list. */
4376 if (msg_action_arg > 0 && msg_action != MSG_DELIVER && msg_action != MSG_LOAD)
4378 int yield = EXIT_SUCCESS;
4379 set_process_info("acting on specified messages");
4381 /* ACL definitions may be needed when removing a message (-Mrm) because
4382 event_action gets expanded */
4384 if (msg_action == MSG_REMOVE)
4387 if (!one_msg_action)
4389 for (i = msg_action_arg; i < argc; i++)
4390 if (!queue_action(argv[i], msg_action, NULL, 0, 0))
4391 yield = EXIT_FAILURE;
4394 case MSG_REMOVE: case MSG_FREEZE: case MSG_THAW: break;
4395 default: printf("\n"); break;
4399 else if (!queue_action(argv[msg_action_arg], msg_action, argv, argc,
4400 recipients_arg)) yield = EXIT_FAILURE;
4404 /* We used to set up here to skip reading the ACL section, on
4405 (msg_action_arg > 0 || (queue_interval == 0 && !f.daemon_listen)
4406 Now, since the intro of the ${acl } expansion, ACL definitions may be
4407 needed in transports so we lost the optimisation. */
4410 #ifdef MEASURE_TIMING
4411 struct timeval t0, diff;
4412 (void)gettimeofday(&t0, NULL);
4417 #ifdef MEASURE_TIMING
4418 report_time_since(&t0, US"readconf_rest (delta)");
4422 /* Handle the -brt option. This is for checking out retry configurations.
4423 The next three arguments are a domain name or a complete address, and
4424 optionally two error numbers. All it does is to call the function that
4425 scans the retry configuration data. */
4427 if (test_retry_arg >= 0)
4429 retry_config *yield;
4430 int basic_errno = 0;
4434 if (test_retry_arg >= argc)
4436 printf("-brt needs a domain or address argument\n");
4437 exim_exit(EXIT_FAILURE, US"main");
4439 s1 = argv[test_retry_arg++];
4442 /* If the first argument contains no @ and no . it might be a local user
4443 or it might be a single-component name. Treat as a domain. */
4445 if (Ustrchr(s1, '@') == NULL && Ustrchr(s1, '.') == NULL)
4447 printf("Warning: \"%s\" contains no '@' and no '.' characters. It is "
4448 "being \ntreated as a one-component domain, not as a local part.\n\n",
4452 /* There may be an optional second domain arg. */
4454 if (test_retry_arg < argc && Ustrchr(argv[test_retry_arg], '.') != NULL)
4455 s2 = argv[test_retry_arg++];
4457 /* The final arg is an error name */
4459 if (test_retry_arg < argc)
4461 uschar *ss = argv[test_retry_arg];
4463 readconf_retry_error(ss, ss + Ustrlen(ss), &basic_errno, &more_errno);
4466 printf("%s\n", CS error);
4467 return EXIT_FAILURE;
4470 /* For the {MAIL,RCPT,DATA}_4xx errors, a value of 255 means "any", and a
4471 code > 100 as an error is for matching codes to the decade. Turn them into
4472 a real error code, off the decade. */
4474 if (basic_errno == ERRNO_MAIL4XX ||
4475 basic_errno == ERRNO_RCPT4XX ||
4476 basic_errno == ERRNO_DATA4XX)
4478 int code = (more_errno >> 8) & 255;
4480 more_errno = (more_errno & 0xffff00ff) | (21 << 8);
4481 else if (code > 100)
4482 more_errno = (more_errno & 0xffff00ff) | ((code - 96) << 8);
4486 if (!(yield = retry_find_config(s1, s2, basic_errno, more_errno)))
4487 printf("No retry information found\n");
4490 more_errno = yield->more_errno;
4491 printf("Retry rule: %s ", yield->pattern);
4493 if (yield->basic_errno == ERRNO_EXIMQUOTA)
4495 printf("quota%s%s ",
4496 (more_errno > 0)? "_" : "",
4497 (more_errno > 0)? readconf_printtime(more_errno) : US"");
4499 else if (yield->basic_errno == ECONNREFUSED)
4501 printf("refused%s%s ",
4502 (more_errno > 0)? "_" : "",
4503 (more_errno == 'M')? "MX" :
4504 (more_errno == 'A')? "A" : "");
4506 else if (yield->basic_errno == ETIMEDOUT)
4509 if ((more_errno & RTEF_CTOUT) != 0) printf("_connect");
4511 if (more_errno != 0) printf("_%s",
4512 (more_errno == 'M')? "MX" : "A");
4515 else if (yield->basic_errno == ERRNO_AUTHFAIL)
4516 printf("auth_failed ");
4519 for (retry_rule * r = yield->rules; r; r = r->next)
4521 printf("%c,%s", r->rule, readconf_printtime(r->timeout)); /* Do not */
4522 printf(",%s", readconf_printtime(r->p1)); /* amalgamate */
4528 printf(",%d.", x/1000);
4542 exim_exit(EXIT_SUCCESS, US"main");
4545 /* Handle a request to list one or more configuration options */
4546 /* If -n was set, we suppress some information */
4551 set_process_info("listing variables");
4552 if (recipients_arg >= argc)
4553 fail = !readconf_print(US"all", NULL, flag_n);
4554 else for (i = recipients_arg; i < argc; i++)
4557 (Ustrcmp(argv[i], "router") == 0 ||
4558 Ustrcmp(argv[i], "transport") == 0 ||
4559 Ustrcmp(argv[i], "authenticator") == 0 ||
4560 Ustrcmp(argv[i], "macro") == 0 ||
4561 Ustrcmp(argv[i], "environment") == 0))
4563 fail |= !readconf_print(argv[i+1], argv[i], flag_n);
4567 fail = !readconf_print(argv[i], NULL, flag_n);
4569 exim_exit(fail ? EXIT_FAILURE : EXIT_SUCCESS, US"main");
4574 set_process_info("listing config");
4575 exim_exit(readconf_print(US"config", NULL, flag_n)
4576 ? EXIT_SUCCESS : EXIT_FAILURE, US"main");
4580 /* Initialise subsystems as required. */
4584 /* Handle a request to deliver one or more messages that are already on the
4585 queue. Values of msg_action other than MSG_DELIVER and MSG_LOAD are dealt with
4586 above. MSG_LOAD is handled with -be (which is the only time it applies) below.
4588 Delivery of specific messages is typically used for a small number when
4589 prodding by hand (when the option forced_delivery will be set) or when
4590 re-execing to regain root privilege. Each message delivery must happen in a
4591 separate process, so we fork a process for each one, and run them sequentially
4592 so that debugging output doesn't get intertwined, and to avoid spawning too
4593 many processes if a long list is given. However, don't fork for the last one;
4594 this saves a process in the common case when Exim is called to deliver just one
4597 if (msg_action_arg > 0 && msg_action != MSG_LOAD)
4599 if (prod_requires_admin && !f.admin_user)
4601 fprintf(stderr, "exim: Permission denied\n");
4602 exim_exit(EXIT_FAILURE, US"main");
4604 set_process_info("delivering specified messages");
4605 if (deliver_give_up) forced_delivery = f.deliver_force_thaw = TRUE;
4606 for (i = msg_action_arg; i < argc; i++)
4611 (void)deliver_message(argv[i], forced_delivery, deliver_give_up);
4612 else if ((pid = exim_fork(US"cmdline-delivery")) == 0)
4614 (void)deliver_message(argv[i], forced_delivery, deliver_give_up);
4615 exim_underbar_exit(EXIT_SUCCESS, US"cmdline-delivery");
4619 fprintf(stderr, "failed to fork delivery process for %s: %s\n", argv[i],
4621 exim_exit(EXIT_FAILURE, US"main");
4625 exim_exit(EXIT_SUCCESS, US"main");
4629 /* If only a single queue run is requested, without SMTP listening, we can just
4630 turn into a queue runner, with an optional starting message id. */
4632 if (queue_interval == 0 && !f.daemon_listen)
4634 DEBUG(D_queue_run) debug_printf("Single queue run%s%s%s%s\n",
4635 start_queue_run_id ? US" starting at " : US"",
4636 start_queue_run_id ? start_queue_run_id: US"",
4637 stop_queue_run_id ? US" stopping at " : US"",
4638 stop_queue_run_id ? stop_queue_run_id : US"");
4640 set_process_info("running the '%s' queue (single queue run)", queue_name);
4642 set_process_info("running the queue (single queue run)");
4643 queue_run(start_queue_run_id, stop_queue_run_id, FALSE);
4644 exim_exit(EXIT_SUCCESS, US"main");
4648 /* Find the login name of the real user running this process. This is always
4649 needed when receiving a message, because it is written into the spool file. It
4650 may also be used to construct a from: or a sender: header, and in this case we
4651 need the user's full name as well, so save a copy of it, checked for RFC822
4652 syntax and munged if necessary, if it hasn't previously been set by the -F
4653 argument. We may try to get the passwd entry more than once, in case NIS or
4654 other delays are in evidence. Save the home directory for use in filter testing
4659 if ((pw = getpwuid(real_uid)) != NULL)
4661 originator_login = string_copy(US pw->pw_name);
4662 originator_home = string_copy(US pw->pw_dir);
4664 /* If user name has not been set by -F, set it from the passwd entry
4665 unless -f has been used to set the sender address by a trusted user. */
4667 if (!originator_name)
4669 if (!sender_address || (!f.trusted_caller && filter_test == FTEST_NONE))
4671 uschar *name = US pw->pw_gecos;
4672 uschar *amp = Ustrchr(name, '&');
4675 /* Most Unix specify that a '&' character in the gecos field is
4676 replaced by a copy of the login name, and some even specify that
4677 the first character should be upper cased, so that's what we do. */
4682 string_format(buffer, sizeof(buffer), "%.*s%n%s%s",
4683 (int)(amp - name), name, &loffset, originator_login, amp + 1);
4684 buffer[loffset] = toupper(buffer[loffset]);
4688 /* If a pattern for matching the gecos field was supplied, apply
4689 it and then expand the name string. */
4691 if (gecos_pattern && gecos_name)
4694 re = regex_must_compile(gecos_pattern, FALSE, TRUE); /* Use malloc */
4696 if (regex_match_and_setup(re, name, 0, -1))
4698 uschar *new_name = expand_string(gecos_name);
4702 DEBUG(D_receive) debug_printf("user name \"%s\" extracted from "
4703 "gecos field \"%s\"\n", new_name, name);
4706 else DEBUG(D_receive) debug_printf("failed to expand gecos_name string "
4707 "\"%s\": %s\n", gecos_name, expand_string_message);
4709 else DEBUG(D_receive) debug_printf("gecos_pattern \"%s\" did not match "
4710 "gecos field \"%s\"\n", gecos_pattern, name);
4711 store_free((void *)re);
4713 originator_name = string_copy(name);
4716 /* A trusted caller has used -f but not -F */
4718 else originator_name = US"";
4721 /* Break the retry loop */
4726 if (++i > finduser_retries) break;
4730 /* If we cannot get a user login, log the incident and give up, unless the
4731 configuration specifies something to use. When running in the test harness,
4732 any setting of unknown_login overrides the actual name. */
4734 if (originator_login == NULL || f.running_in_test_harness)
4736 if (unknown_login != NULL)
4738 originator_login = expand_string(unknown_login);
4739 if (originator_name == NULL && unknown_username != NULL)
4740 originator_name = expand_string(unknown_username);
4741 if (originator_name == NULL) originator_name = US"";
4743 if (originator_login == NULL)
4744 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Failed to get user name for uid %d",
4748 /* Ensure that the user name is in a suitable form for use as a "phrase" in an
4751 originator_name = string_copy(parse_fix_phrase(originator_name,
4752 Ustrlen(originator_name), big_buffer, big_buffer_size));
4754 /* If a message is created by this call of Exim, the uid/gid of its originator
4755 are those of the caller. These values are overridden if an existing message is
4756 read in from the spool. */
4758 originator_uid = real_uid;
4759 originator_gid = real_gid;
4761 DEBUG(D_receive) debug_printf("originator: uid=%d gid=%d login=%s name=%s\n",
4762 (int)originator_uid, (int)originator_gid, originator_login, originator_name);
4764 /* Run in daemon and/or queue-running mode. The function daemon_go() never
4765 returns. We leave this till here so that the originator_ fields are available
4766 for incoming messages via the daemon. The daemon cannot be run in mua_wrapper
4769 if (f.daemon_listen || f.inetd_wait_mode || queue_interval > 0)
4773 fprintf(stderr, "Daemon cannot be run when mua_wrapper is set\n");
4774 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Daemon cannot be run when "
4775 "mua_wrapper is set");
4778 # ifndef DISABLE_TLS
4779 /* This also checks that the library linkage is working and we can call
4780 routines in it, so call even if tls_require_ciphers is unset */
4782 # ifdef MEASURE_TIMING
4783 struct timeval t0, diff;
4784 (void)gettimeofday(&t0, NULL);
4786 if (!tls_dropprivs_validate_require_cipher(FALSE))
4788 # ifdef MEASURE_TIMING
4789 report_time_since(&t0, US"validate_ciphers (delta)");
4797 /* If the sender ident has not been set (by a trusted caller) set it to
4798 the caller. This will get overwritten below for an inetd call. If a trusted
4799 caller has set it empty, unset it. */
4801 if (!sender_ident) sender_ident = originator_login;
4802 else if (!*sender_ident) sender_ident = NULL;
4804 /* Handle the -brw option, which is for checking out rewriting rules. Cause log
4805 writes (on errors) to go to stderr instead. Can't do this earlier, as want the
4806 originator_* variables set. */
4808 if (test_rewrite_arg >= 0)
4810 f.really_exim = FALSE;
4811 if (test_rewrite_arg >= argc)
4813 printf("-brw needs an address argument\n");
4814 exim_exit(EXIT_FAILURE, US"main");
4816 rewrite_test(argv[test_rewrite_arg]);
4817 exim_exit(EXIT_SUCCESS, US"main");
4820 /* A locally-supplied message is considered to be coming from a local user
4821 unless a trusted caller supplies a sender address with -f, or is passing in the
4822 message via SMTP (inetd invocation or otherwise). */
4824 if ( !sender_address && !smtp_input
4825 || !f.trusted_caller && filter_test == FTEST_NONE)
4827 f.sender_local = TRUE;
4829 /* A trusted caller can supply authenticated_sender and authenticated_id
4830 via -oMas and -oMai and if so, they will already be set. Otherwise, force
4831 defaults except when host checking. */
4833 if (!authenticated_sender && !host_checking)
4834 authenticated_sender = string_sprintf("%s@%s", originator_login,
4835 qualify_domain_sender);
4836 if (!authenticated_id && !host_checking)
4837 authenticated_id = originator_login;
4840 /* Trusted callers are always permitted to specify the sender address.
4841 Untrusted callers may specify it if it matches untrusted_set_sender, or if what
4842 is specified is the empty address. However, if a trusted caller does not
4843 specify a sender address for SMTP input, we leave sender_address unset. This
4844 causes the MAIL commands to be honoured. */
4846 if ( !smtp_input && !sender_address
4847 || !receive_check_set_sender(sender_address))
4849 /* Either the caller is not permitted to set a general sender, or this is
4850 non-SMTP input and the trusted caller has not set a sender. If there is no
4851 sender, or if a sender other than <> is set, override with the originator's
4852 login (which will get qualified below), except when checking things. */
4854 if (sender_address == NULL /* No sender_address set */
4856 (sender_address[0] != 0 && /* Non-empty sender address, AND */
4857 !checking)) /* Not running tests, including filter tests */
4859 sender_address = originator_login;
4860 f.sender_address_forced = FALSE;
4861 sender_address_domain = 0;
4865 /* Remember whether an untrusted caller set the sender address */
4867 f.sender_set_untrusted = sender_address != originator_login && !f.trusted_caller;
4869 /* Ensure that the sender address is fully qualified unless it is the empty
4870 address, which indicates an error message, or doesn't exist (root caller, smtp
4871 interface, no -f argument). */
4873 if (sender_address && *sender_address && sender_address_domain == 0)
4874 sender_address = string_sprintf("%s@%s", local_part_quote(sender_address),
4875 qualify_domain_sender);
4877 DEBUG(D_receive) debug_printf("sender address = %s\n", sender_address);
4879 /* Handle a request to verify a list of addresses, or test them for delivery.
4880 This must follow the setting of the sender address, since routers can be
4881 predicated upon the sender. If no arguments are given, read addresses from
4882 stdin. Set debug_level to at least D_v to get full output for address testing.
4885 if (verify_address_mode || f.address_test_mode)
4888 int flags = vopt_qualify;
4890 if (verify_address_mode)
4892 if (!verify_as_sender) flags |= vopt_is_recipient;
4893 DEBUG(D_verify) debug_print_ids(US"Verifying:");
4898 flags |= vopt_is_recipient;
4899 debug_selector |= D_v;
4900 debug_file = stderr;
4901 debug_fd = fileno(debug_file);
4902 DEBUG(D_verify) debug_print_ids(US"Address testing:");
4905 if (recipients_arg < argc)
4907 while (recipients_arg < argc)
4909 /* Supplied addresses are tainted since they come from a user */
4910 uschar * s = string_copy_taint(argv[recipients_arg++], TRUE);
4913 BOOL finished = FALSE;
4914 uschar *ss = parse_find_address_end(s, FALSE);
4915 if (*ss == ',') *ss = 0; else finished = TRUE;
4916 test_address(s, flags, &exit_value);
4919 while (*++s == ',' || isspace(*s)) ;
4926 uschar * s = get_stdinput(NULL, NULL);
4928 test_address(string_copy_taint(s, TRUE), flags, &exit_value);
4932 exim_exit(exit_value, US"main");
4935 /* Handle expansion checking. Either expand items on the command line, or read
4936 from stdin if there aren't any. If -Mset was specified, load the message so
4937 that its variables can be used, but restrict this facility to admin users.
4938 Otherwise, if -bem was used, read a message from stdin. */
4942 dns_init(FALSE, FALSE, FALSE);
4943 if (msg_action_arg > 0 && msg_action == MSG_LOAD)
4945 uschar spoolname[256]; /* Not big_buffer; used in spool_read_header() */
4947 exim_fail("exim: permission denied\n");
4948 message_id = argv[msg_action_arg];
4949 (void)string_format(spoolname, sizeof(spoolname), "%s-H", message_id);
4950 if ((deliver_datafile = spool_open_datafile(message_id)) < 0)
4951 printf ("Failed to load message datafile %s\n", message_id);
4952 if (spool_read_header(spoolname, TRUE, FALSE) != spool_read_OK)
4953 printf ("Failed to load message %s\n", message_id);
4956 /* Read a test message from a file. We fudge it up to be on stdin, saving
4957 stdin itself for later reading of expansion strings. */
4959 else if (expansion_test_message)
4961 int save_stdin = dup(0);
4962 int fd = Uopen(expansion_test_message, O_RDONLY, 0);
4964 exim_fail("exim: failed to open %s: %s\n", expansion_test_message,
4967 filter_test = FTEST_USER; /* Fudge to make it look like filter test */
4968 message_ended = END_NOTENDED;
4969 read_message_body(receive_msg(extract_recipients));
4970 message_linecount += body_linecount;
4971 (void)dup2(save_stdin, 0);
4972 (void)close(save_stdin);
4973 clearerr(stdin); /* Required by Darwin */
4976 /* Only admin users may see config-file macros this way */
4978 if (!f.admin_user) macros_user = macros = mlast = NULL;
4980 /* Allow $recipients for this testing */
4982 f.enable_dollar_recipients = TRUE;
4984 /* Expand command line items */
4986 if (recipients_arg < argc)
4987 while (recipients_arg < argc)
4988 expansion_test_line(argv[recipients_arg++]);
4994 char *(*fn_readline)(const char *) = NULL;
4995 void (*fn_addhist)(const char *) = NULL;
4999 void *dlhandle = set_readline(&fn_readline, &fn_addhist);
5002 while (s = get_stdinput(fn_readline, fn_addhist))
5003 expansion_test_line(s);
5006 if (dlhandle) dlclose(dlhandle);
5010 /* The data file will be open after -Mset */
5012 if (deliver_datafile >= 0)
5014 (void)close(deliver_datafile);
5015 deliver_datafile = -1;
5018 exim_exit(EXIT_SUCCESS, US"main: expansion test");
5022 /* The active host name is normally the primary host name, but it can be varied
5023 for hosts that want to play several parts at once. We need to ensure that it is
5024 set for host checking, and for receiving messages. */
5026 smtp_active_hostname = primary_hostname;
5027 if (raw_active_hostname != NULL)
5029 uschar *nah = expand_string(raw_active_hostname);
5032 if (!f.expand_string_forcedfail)
5033 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to expand \"%s\" "
5034 "(smtp_active_hostname): %s", raw_active_hostname,
5035 expand_string_message);
5037 else if (nah[0] != 0) smtp_active_hostname = nah;
5040 /* Handle host checking: this facility mocks up an incoming SMTP call from a
5041 given IP address so that the blocking and relay configuration can be tested.
5042 Unless a sender_ident was set by -oMt, we discard it (the default is the
5043 caller's login name). An RFC 1413 call is made only if we are running in the
5044 test harness and an incoming interface and both ports are specified, because
5045 there is no TCP/IP call to find the ident for. */
5052 if (!sender_ident_set)
5054 sender_ident = NULL;
5055 if (f.running_in_test_harness && sender_host_port
5056 && interface_address && interface_port)
5057 verify_get_ident(1223); /* note hardwired port number */
5060 /* In case the given address is a non-canonical IPv6 address, canonicalize
5061 it. The code works for both IPv4 and IPv6, as it happens. */
5063 size = host_aton(sender_host_address, x);
5064 sender_host_address = store_get(48, FALSE); /* large enough for full IPv6 */
5065 (void)host_nmtoa(size, x, -1, sender_host_address, ':');
5067 /* Now set up for testing */
5069 host_build_sender_fullhost();
5073 f.sender_local = FALSE;
5074 f.sender_host_notsocket = TRUE;
5075 debug_file = stderr;
5076 debug_fd = fileno(debug_file);
5077 fprintf(stdout, "\n**** SMTP testing session as if from host %s\n"
5078 "**** but without any ident (RFC 1413) callback.\n"
5079 "**** This is not for real!\n\n",
5080 sender_host_address);
5082 memset(sender_host_cache, 0, sizeof(sender_host_cache));
5083 if (verify_check_host(&hosts_connection_nolog) == OK)
5084 BIT_CLEAR(log_selector, log_selector_size, Li_smtp_connection);
5085 log_write(L_smtp_connection, LOG_MAIN, "%s", smtp_get_connection_info());
5087 /* NOTE: We do *not* call smtp_log_no_mail() if smtp_start_session() fails,
5088 because a log line has already been written for all its failure exists
5089 (usually "connection refused: <reason>") and writing another one is
5090 unnecessary clutter. */
5092 if (smtp_start_session())
5094 for (; (reset_point = store_mark()); store_reset(reset_point))
5096 if (smtp_setup_msg() <= 0) break;
5097 if (!receive_msg(FALSE)) break;
5099 return_path = sender_address = NULL;
5100 dnslist_domain = dnslist_matched = NULL;
5101 #ifndef DISABLE_DKIM
5102 dkim_cur_signer = NULL;
5105 deliver_localpart_orig = NULL;
5106 deliver_domain_orig = NULL;
5107 callout_address = sending_ip_address = NULL;
5108 sender_rate = sender_rate_limit = sender_rate_period = NULL;
5112 exim_exit(EXIT_SUCCESS, US"main");
5116 /* Arrange for message reception if recipients or SMTP were specified;
5117 otherwise complain unless a version print (-bV) happened or this is a filter
5118 verification test or info dump.
5119 In the former case, show the configuration file name. */
5121 if (recipients_arg >= argc && !extract_recipients && !smtp_input)
5123 if (version_printed)
5125 if (Ustrchr(config_main_filelist, ':'))
5126 printf("Configuration file search path is %s\n", config_main_filelist);
5127 printf("Configuration file is %s\n", config_main_filename);
5128 return EXIT_SUCCESS;
5131 if (info_flag != CMDINFO_NONE)
5133 show_exim_information(info_flag, info_stdout ? stdout : stderr);
5134 return info_stdout ? EXIT_SUCCESS : EXIT_FAILURE;
5137 if (filter_test == FTEST_NONE)
5138 exim_usage(called_as);
5142 /* If mua_wrapper is set, Exim is being used to turn an MUA that submits on the
5143 standard input into an MUA that submits to a smarthost over TCP/IP. We know
5144 that we are not called from inetd, because that is rejected above. The
5145 following configuration settings are forced here:
5147 (1) Synchronous delivery (-odi)
5148 (2) Errors to stderr (-oep == -oeq)
5149 (3) No parallel remote delivery
5150 (4) Unprivileged delivery
5152 We don't force overall queueing options because there are several of them;
5153 instead, queueing is avoided below when mua_wrapper is set. However, we do need
5154 to override any SMTP queueing. */
5158 f.synchronous_delivery = TRUE;
5159 arg_error_handling = ERRORS_STDERR;
5160 remote_max_parallel = 1;
5161 deliver_drop_privilege = TRUE;
5162 f.queue_smtp = FALSE;
5163 queue_smtp_domains = NULL;
5165 message_utf8_downconvert = -1; /* convert-if-needed */
5170 /* Prepare to accept one or more new messages on the standard input. When a
5171 message has been read, its id is returned in message_id[]. If doing immediate
5172 delivery, we fork a delivery process for each received message, except for the
5173 last one, where we can save a process switch.
5175 It is only in non-smtp mode that error_handling is allowed to be changed from
5176 its default of ERRORS_SENDER by argument. (Idle thought: are any of the
5177 sendmail error modes other than -oem ever actually used? Later: yes.) */
5179 if (!smtp_input) error_handling = arg_error_handling;
5181 /* If this is an inetd call, ensure that stderr is closed to prevent panic
5182 logging being sent down the socket and make an identd call to get the
5185 else if (f.is_inetd)
5187 (void)fclose(stderr);
5188 exim_nullstd(); /* Re-open to /dev/null */
5189 verify_get_ident(IDENT_PORT);
5190 host_build_sender_fullhost();
5191 set_process_info("handling incoming connection from %s via inetd",
5195 /* If the sender host address has been set, build sender_fullhost if it hasn't
5196 already been done (which it will have been for inetd). This caters for the
5197 case when it is forced by -oMa. However, we must flag that it isn't a socket,
5198 so that the test for IP options is skipped for -bs input. */
5200 if (sender_host_address && !sender_fullhost)
5202 host_build_sender_fullhost();
5203 set_process_info("handling incoming connection from %s via -oMa",
5205 f.sender_host_notsocket = TRUE;
5208 /* Otherwise, set the sender host as unknown except for inetd calls. This
5209 prevents host checking in the case of -bs not from inetd and also for -bS. */
5211 else if (!f.is_inetd) f.sender_host_unknown = TRUE;
5213 /* If stdout does not exist, then dup stdin to stdout. This can happen
5214 if exim is started from inetd. In this case fd 0 will be set to the socket,
5215 but fd 1 will not be set. This also happens for passed SMTP channels. */
5217 if (fstat(1, &statbuf) < 0) (void)dup2(0, 1);
5219 /* Set up the incoming protocol name and the state of the program. Root is
5220 allowed to force received protocol via the -oMr option above. If we have come
5221 via inetd, the process info has already been set up. We don't set
5222 received_protocol here for smtp input, as it varies according to
5223 batch/HELO/EHLO/AUTH/TLS. */
5227 if (!f.is_inetd) set_process_info("accepting a local %sSMTP message from <%s>",
5228 smtp_batched_input? "batched " : "",
5229 (sender_address!= NULL)? sender_address : originator_login);
5233 int old_pool = store_pool;
5234 store_pool = POOL_PERM;
5235 if (!received_protocol)
5236 received_protocol = string_sprintf("local%s", called_as);
5237 store_pool = old_pool;
5238 set_process_info("accepting a local non-SMTP message from <%s>",
5242 /* Initialize the session_local_queue-only flag (this will be ignored if
5243 mua_wrapper is set) */
5246 session_local_queue_only = queue_only;
5248 /* For non-SMTP and for batched SMTP input, check that there is enough space on
5249 the spool if so configured. On failure, we must not attempt to send an error
5250 message! (For interactive SMTP, the check happens at MAIL FROM and an SMTP
5251 error code is given.) */
5253 if ((!smtp_input || smtp_batched_input) && !receive_check_fs(0))
5254 exim_fail("exim: insufficient disk space\n");
5256 /* If this is smtp input of any kind, real or batched, handle the start of the
5259 NOTE: We do *not* call smtp_log_no_mail() if smtp_start_session() fails,
5260 because a log line has already been written for all its failure exists
5261 (usually "connection refused: <reason>") and writing another one is
5262 unnecessary clutter. */
5268 memset(sender_host_cache, 0, sizeof(sender_host_cache));
5269 if (verify_check_host(&hosts_connection_nolog) == OK)
5270 BIT_CLEAR(log_selector, log_selector_size, Li_smtp_connection);
5271 log_write(L_smtp_connection, LOG_MAIN, "%s", smtp_get_connection_info());
5272 if (!smtp_start_session())
5275 exim_exit(EXIT_SUCCESS, US"smtp_start toplevel");
5279 /* Otherwise, set up the input size limit here. */
5283 thismessage_size_limit = expand_string_integer(message_size_limit, TRUE);
5284 if (expand_string_message)
5285 if (thismessage_size_limit == -1)
5286 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to expand "
5287 "message_size_limit: %s", expand_string_message);
5289 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "invalid value for "
5290 "message_size_limit: %s", expand_string_message);
5293 /* Loop for several messages when reading SMTP input. If we fork any child
5294 processes, we don't want to wait for them unless synchronous delivery is
5295 requested, so set SIGCHLD to SIG_IGN in that case. This is not necessarily the
5296 same as SIG_DFL, despite the fact that documentation often lists the default as
5297 "ignore". This is a confusing area. This is what I know:
5299 At least on some systems (e.g. Solaris), just setting SIG_IGN causes child
5300 processes that complete simply to go away without ever becoming defunct. You
5301 can't then wait for them - but we don't want to wait for them in the
5302 non-synchronous delivery case. However, this behaviour of SIG_IGN doesn't
5303 happen for all OS (e.g. *BSD is different).
5305 But that's not the end of the story. Some (many? all?) systems have the
5306 SA_NOCLDWAIT option for sigaction(). This requests the behaviour that Solaris
5307 has by default, so it seems that the difference is merely one of default
5308 (compare restarting vs non-restarting signals).
5310 To cover all cases, Exim sets SIG_IGN with SA_NOCLDWAIT here if it can. If not,
5311 it just sets SIG_IGN. To be on the safe side it also calls waitpid() at the end
5312 of the loop below. Paranoia rules.
5314 February 2003: That's *still* not the end of the story. There are now versions
5315 of Linux (where SIG_IGN does work) that are picky. If, having set SIG_IGN, a
5316 process then calls waitpid(), a grumble is written to the system log, because
5317 this is logically inconsistent. In other words, it doesn't like the paranoia.
5318 As a consequence of this, the waitpid() below is now excluded if we are sure
5319 that SIG_IGN works. */
5321 if (!f.synchronous_delivery)
5324 struct sigaction act;
5325 act.sa_handler = SIG_IGN;
5326 sigemptyset(&(act.sa_mask));
5327 act.sa_flags = SA_NOCLDWAIT;
5328 sigaction(SIGCHLD, &act, NULL);
5330 signal(SIGCHLD, SIG_IGN);
5334 /* Save the current store pool point, for resetting at the start of
5335 each message, and save the real sender address, if any. */
5337 real_sender_address = sender_address;
5339 /* Loop to receive messages; receive_msg() returns TRUE if there are more
5340 messages to be read (SMTP input), or FALSE otherwise (not SMTP, or SMTP channel
5345 reset_point = store_mark();
5348 /* Handle the SMTP case; call smtp_setup_mst() to deal with the initial SMTP
5349 input and build the recipients list, before calling receive_msg() to read the
5350 message proper. Whatever sender address is given in the SMTP transaction is
5351 often ignored for local senders - we use the actual sender, which is normally
5352 either the underlying user running this process or a -f argument provided by
5353 a trusted caller. It is saved in real_sender_address. The test for whether to
5354 accept the SMTP sender is encapsulated in receive_check_set_sender(). */
5359 if ((rc = smtp_setup_msg()) > 0)
5361 if (real_sender_address != NULL &&
5362 !receive_check_set_sender(sender_address))
5364 sender_address = raw_sender = real_sender_address;
5365 sender_address_unrewritten = NULL;
5368 /* For batched SMTP, we have to run the acl_not_smtp_start ACL, since it
5369 isn't really SMTP, so no other ACL will run until the acl_not_smtp one at
5370 the very end. The result of the ACL is ignored (as for other non-SMTP
5371 messages). It is run for its potential side effects. */
5373 if (smtp_batched_input && acl_not_smtp_start != NULL)
5375 uschar *user_msg, *log_msg;
5376 f.enable_dollar_recipients = TRUE;
5377 (void)acl_check(ACL_WHERE_NOTSMTP_START, NULL, acl_not_smtp_start,
5378 &user_msg, &log_msg);
5379 f.enable_dollar_recipients = FALSE;
5382 /* Now get the data for the message */
5384 more = receive_msg(extract_recipients);
5385 if (message_id[0] == 0)
5387 cancel_cutthrough_connection(TRUE, US"receive dropped");
5388 if (more) goto moreloop;
5389 smtp_log_no_mail(); /* Log no mail if configured */
5390 exim_exit(EXIT_FAILURE, US"receive toplevel");
5395 cancel_cutthrough_connection(TRUE, US"message setup dropped");
5396 smtp_log_no_mail(); /* Log no mail if configured */
5397 exim_exit(rc ? EXIT_FAILURE : EXIT_SUCCESS, US"msg setup toplevel");
5401 /* In the non-SMTP case, we have all the information from the command
5402 line, but must process it in case it is in the more general RFC822
5403 format, and in any case, to detect syntax errors. Also, it appears that
5404 the use of comma-separated lists as single arguments is common, so we
5405 had better support them. */
5410 int count = argc - recipients_arg;
5411 uschar **list = argv + recipients_arg;
5413 /* These options cannot be changed dynamically for non-SMTP messages */
5415 f.active_local_sender_retain = local_sender_retain;
5416 f.active_local_from_check = local_from_check;
5418 /* Save before any rewriting */
5420 raw_sender = string_copy(sender_address);
5422 /* Loop for each argument (supplied by user hence tainted) */
5424 for (int i = 0; i < count; i++)
5426 int start, end, domain;
5428 uschar * s = string_copy_taint(list[i], TRUE);
5430 /* Loop for each comma-separated address */
5434 BOOL finished = FALSE;
5436 uschar *ss = parse_find_address_end(s, FALSE);
5438 if (*ss == ',') *ss = 0; else finished = TRUE;
5440 /* Check max recipients - if -t was used, these aren't recipients */
5442 if (recipients_max > 0 && ++rcount > recipients_max &&
5443 !extract_recipients)
5444 if (error_handling == ERRORS_STDERR)
5446 fprintf(stderr, "exim: too many recipients\n");
5447 exim_exit(EXIT_FAILURE, US"main");
5451 moan_to_sender(ERRMESS_TOOMANYRECIP, NULL, NULL, stdin, TRUE)?
5452 errors_sender_rc : EXIT_FAILURE;
5456 BOOL b = allow_utf8_domains;
5457 allow_utf8_domains = TRUE;
5460 parse_extract_address(s, &errmess, &start, &end, &domain, FALSE);
5463 if (string_is_utf8(recipient))
5464 message_smtputf8 = TRUE;
5466 allow_utf8_domains = b;
5469 if (domain == 0 && !f.allow_unqualified_recipient)
5472 errmess = US"unqualified recipient address not allowed";
5475 if (recipient == NULL)
5477 if (error_handling == ERRORS_STDERR)
5479 fprintf(stderr, "exim: bad recipient address \"%s\": %s\n",
5480 string_printing(list[i]), errmess);
5481 exim_exit(EXIT_FAILURE, US"main");
5487 eblock.text1 = string_printing(list[i]);
5488 eblock.text2 = errmess;
5490 moan_to_sender(ERRMESS_BADARGADDRESS, &eblock, NULL, stdin, TRUE)?
5491 errors_sender_rc : EXIT_FAILURE;
5495 receive_add_recipient(string_copy_taint(recipient, TRUE), -1);
5498 while (*(++s) != 0 && (*s == ',' || isspace(*s)));
5502 /* Show the recipients when debugging */
5506 if (sender_address != NULL) debug_printf("Sender: %s\n", sender_address);
5507 if (recipients_list != NULL)
5509 debug_printf("Recipients:\n");
5510 for (int i = 0; i < recipients_count; i++)
5511 debug_printf(" %s\n", recipients_list[i].address);
5515 /* Run the acl_not_smtp_start ACL if required. The result of the ACL is
5516 ignored; rejecting here would just add complication, and it can just as
5517 well be done later. Allow $recipients to be visible in the ACL. */
5519 if (acl_not_smtp_start)
5521 uschar *user_msg, *log_msg;
5522 f.enable_dollar_recipients = TRUE;
5523 (void)acl_check(ACL_WHERE_NOTSMTP_START, NULL, acl_not_smtp_start,
5524 &user_msg, &log_msg);
5525 f.enable_dollar_recipients = FALSE;
5528 /* Pause for a while waiting for input. If none received in that time,
5529 close the logfile, if we had one open; then if we wait for a long-running
5530 datasource (months, in one use-case) log rotation will not leave us holding
5533 if (!receive_timeout)
5535 struct timeval t = { .tv_sec = 30*60, .tv_usec = 0 }; /* 30 minutes */
5538 FD_ZERO(&r); FD_SET(0, &r);
5539 if (select(1, &r, NULL, NULL, &t) == 0) mainlog_close();
5542 /* Read the data for the message. If filter_test is not FTEST_NONE, this
5543 will just read the headers for the message, and not write anything onto the
5546 message_ended = END_NOTENDED;
5547 more = receive_msg(extract_recipients);
5549 /* more is always FALSE here (not SMTP message) when reading a message
5550 for real; when reading the headers of a message for filter testing,
5551 it is TRUE if the headers were terminated by '.' and FALSE otherwise. */
5553 if (message_id[0] == 0) exim_exit(EXIT_FAILURE, US"main");
5554 } /* Non-SMTP message reception */
5556 /* If this is a filter testing run, there are headers in store, but
5557 no message on the spool. Run the filtering code in testing mode, setting
5558 the domain to the qualify domain and the local part to the current user,
5559 unless they have been set by options. The prefix and suffix are left unset
5560 unless specified. The the return path is set to to the sender unless it has
5561 already been set from a return-path header in the message. */
5563 if (filter_test != FTEST_NONE)
5565 deliver_domain = (ftest_domain != NULL)?
5566 ftest_domain : qualify_domain_recipient;
5567 deliver_domain_orig = deliver_domain;
5568 deliver_localpart = (ftest_localpart != NULL)?
5569 ftest_localpart : originator_login;
5570 deliver_localpart_orig = deliver_localpart;
5571 deliver_localpart_prefix = ftest_prefix;
5572 deliver_localpart_suffix = ftest_suffix;
5573 deliver_home = originator_home;
5575 if (return_path == NULL)
5577 printf("Return-path copied from sender\n");
5578 return_path = string_copy(sender_address);
5581 printf("Return-path = %s\n", (return_path[0] == 0)? US"<>" : return_path);
5582 printf("Sender = %s\n", (sender_address[0] == 0)? US"<>" : sender_address);
5584 receive_add_recipient(
5585 string_sprintf("%s%s%s@%s",
5586 (ftest_prefix == NULL)? US"" : ftest_prefix,
5588 (ftest_suffix == NULL)? US"" : ftest_suffix,
5589 deliver_domain), -1);
5591 printf("Recipient = %s\n", recipients_list[0].address);
5592 if (ftest_prefix != NULL) printf("Prefix = %s\n", ftest_prefix);
5593 if (ftest_suffix != NULL) printf("Suffix = %s\n", ftest_suffix);
5595 if (chdir("/")) /* Get away from wherever the user is running this from */
5597 DEBUG(D_receive) debug_printf("chdir(\"/\") failed\n");
5598 exim_exit(EXIT_FAILURE, US"main");
5601 /* Now we run either a system filter test, or a user filter test, or both.
5602 In the latter case, headers added by the system filter will persist and be
5603 available to the user filter. We need to copy the filter variables
5606 if ((filter_test & FTEST_SYSTEM) != 0)
5607 if (!filter_runtest(filter_sfd, filter_test_sfile, TRUE, more))
5608 exim_exit(EXIT_FAILURE, US"main");
5610 memcpy(filter_sn, filter_n, sizeof(filter_sn));
5612 if ((filter_test & FTEST_USER) != 0)
5613 if (!filter_runtest(filter_ufd, filter_test_ufile, FALSE, more))
5614 exim_exit(EXIT_FAILURE, US"main");
5616 exim_exit(EXIT_SUCCESS, US"main");
5619 /* Else act on the result of message reception. We should not get here unless
5620 message_id[0] is non-zero. If queue_only is set, session_local_queue_only
5621 will be TRUE. If it is not, check on the number of messages received in this
5624 if (!session_local_queue_only &&
5625 smtp_accept_queue_per_connection > 0 &&
5626 receive_messagecount > smtp_accept_queue_per_connection)
5628 session_local_queue_only = TRUE;
5629 queue_only_reason = 2;
5632 /* Initialize local_queue_only from session_local_queue_only. If it is false,
5633 and queue_only_load is set, check that the load average is below it. If it is
5634 not, set local_queue_only TRUE. If queue_only_load_latch is true (the
5635 default), we put the whole session into queue_only mode. It then remains this
5636 way for any subsequent messages on the same SMTP connection. This is a
5637 deliberate choice; even though the load average may fall, it doesn't seem
5638 right to deliver later messages on the same call when not delivering earlier
5639 ones. However, there are odd cases where this is not wanted, so this can be
5640 changed by setting queue_only_load_latch false. */
5642 local_queue_only = session_local_queue_only;
5643 if (!local_queue_only && queue_only_load >= 0)
5645 local_queue_only = (load_average = OS_GETLOADAVG()) > queue_only_load;
5646 if (local_queue_only)
5648 queue_only_reason = 3;
5649 if (queue_only_load_latch) session_local_queue_only = TRUE;
5653 /* If running as an MUA wrapper, all queueing options and freezing options
5657 local_queue_only = f.queue_only_policy = f.deliver_freeze = FALSE;
5659 /* Log the queueing here, when it will get a message id attached, but
5660 not if queue_only is set (case 0). Case 1 doesn't happen here (too many
5663 if (local_queue_only)
5665 cancel_cutthrough_connection(TRUE, US"no delivery; queueing");
5666 switch(queue_only_reason)
5669 log_write(L_delay_delivery,
5670 LOG_MAIN, "no immediate delivery: more than %d messages "
5671 "received in one connection", smtp_accept_queue_per_connection);
5675 log_write(L_delay_delivery,
5676 LOG_MAIN, "no immediate delivery: load average %.2f",
5677 (double)load_average/1000.0);
5682 else if (f.queue_only_policy || f.deliver_freeze)
5683 cancel_cutthrough_connection(TRUE, US"no delivery; queueing");
5685 /* Else do the delivery unless the ACL or local_scan() called for queue only
5686 or froze the message. Always deliver in a separate process. A fork failure is
5687 not a disaster, as the delivery will eventually happen on a subsequent queue
5688 run. The search cache must be tidied before the fork, as the parent will
5689 do it before exiting. The child will trigger a lookup failure and
5690 thereby defer the delivery if it tries to use (for example) a cached ldap
5691 connection that the parent has called unbind on. */
5698 if ((pid = exim_fork(US"local-accept delivery")) == 0)
5701 close_unwanted(); /* Close unwanted file descriptors and TLS */
5702 exim_nullstd(); /* Ensure std{in,out,err} exist */
5704 /* Re-exec Exim if we need to regain privilege (note: in mua_wrapper
5705 mode, deliver_drop_privilege is forced TRUE). */
5707 if (geteuid() != root_uid && !deliver_drop_privilege && !unprivileged)
5709 delivery_re_exec(CEE_EXEC_EXIT);
5710 /* Control does not return here. */
5713 /* No need to re-exec */
5715 rc = deliver_message(message_id, FALSE, FALSE);
5717 exim_underbar_exit(!mua_wrapper || rc == DELIVER_MUA_SUCCEEDED
5718 ? EXIT_SUCCESS : EXIT_FAILURE, US"cmdline-delivery");
5723 cancel_cutthrough_connection(TRUE, US"delivery fork failed");
5724 log_write(0, LOG_MAIN|LOG_PANIC, "failed to fork automatic delivery "
5725 "process: %s", strerror(errno));
5729 release_cutthrough_connection(US"msg passed for delivery");
5731 /* In the parent, wait if synchronous delivery is required. This will
5732 always be the case in MUA wrapper mode. */
5734 if (f.synchronous_delivery)
5737 while (wait(&status) != pid);
5738 if ((status & 0x00ff) != 0)
5739 log_write(0, LOG_MAIN|LOG_PANIC,
5740 "process %d crashed with signal %d while delivering %s",
5741 (int)pid, status & 0x00ff, message_id);
5742 if (mua_wrapper && (status & 0xffff) != 0) exim_exit(EXIT_FAILURE, US"main");
5747 /* The loop will repeat if more is TRUE. If we do not know know that the OS
5748 automatically reaps children (see comments above the loop), clear away any
5749 finished subprocesses here, in case there are lots of messages coming in
5750 from the same source. */
5752 #ifndef SIG_IGN_WORKS
5753 while (waitpid(-1, NULL, WNOHANG) > 0);
5757 return_path = sender_address = NULL;
5758 authenticated_sender = NULL;
5759 deliver_localpart_orig = NULL;
5760 deliver_domain_orig = NULL;
5761 deliver_host = deliver_host_address = NULL;
5762 dnslist_domain = dnslist_matched = NULL;
5763 #ifdef WITH_CONTENT_SCAN
5764 malware_name = NULL;
5766 callout_address = NULL;
5767 sending_ip_address = NULL;
5769 for(int i = 0; i < REGEX_VARS; i++) regex_vars[i] = NULL;
5771 store_reset(reset_point);
5774 exim_exit(EXIT_SUCCESS, US"main"); /* Never returns */
5775 return 0; /* To stop compiler warning */