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;
313 if (itval->it_value.tv_usec < 50 && itval->it_value.tv_sec == 0)
315 (void)sigemptyset(&sigmask); /* Empty mask */
316 (void)sigaddset(&sigmask, SIGALRM); /* Add SIGALRM */
317 (void)sigprocmask(SIG_BLOCK, &sigmask, &old_sigmask); /* Block SIGALRM */
318 if (setitimer(ITIMER_REAL, itval, NULL) < 0) /* Start timer */
319 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
320 "setitimer() failed: %s", strerror(errno));
321 (void)sigfillset(&sigmask); /* All signals */
322 (void)sigdelset(&sigmask, SIGALRM); /* Remove SIGALRM */
323 (void)sigsuspend(&sigmask); /* Until SIGALRM */
324 (void)sigprocmask(SIG_SETMASK, &old_sigmask, NULL); /* Restore mask */
330 /*************************************************
331 * Millisecond sleep function *
332 *************************************************/
334 /* The basic sleep() function has a granularity of 1 second, which is too rough
335 in some cases - for example, when using an increasing delay to slow down
338 Argument: number of millseconds
345 struct itimerval itval;
346 itval.it_interval.tv_sec = 0;
347 itval.it_interval.tv_usec = 0;
348 itval.it_value.tv_sec = msec/1000;
349 itval.it_value.tv_usec = (msec % 1000) * 1000;
355 /*************************************************
356 * Compare microsecond times *
357 *************************************************/
364 Returns: -1, 0, or +1
368 exim_tvcmp(struct timeval *t1, struct timeval *t2)
370 if (t1->tv_sec > t2->tv_sec) return +1;
371 if (t1->tv_sec < t2->tv_sec) return -1;
372 if (t1->tv_usec > t2->tv_usec) return +1;
373 if (t1->tv_usec < t2->tv_usec) return -1;
380 /*************************************************
381 * Clock tick wait function *
382 *************************************************/
384 #ifdef _POSIX_MONOTONIC_CLOCK
385 /* Amount CLOCK_MONOTONIC is behind realtime, at startup. */
386 static struct timespec offset_ts;
389 exim_clock_init(void)
392 if (clock_gettime(CLOCK_MONOTONIC, &offset_ts) != 0) return;
393 (void)gettimeofday(&tv, NULL);
394 offset_ts.tv_sec = tv.tv_sec - offset_ts.tv_sec;
395 offset_ts.tv_nsec = tv.tv_usec * 1000 - offset_ts.tv_nsec;
396 if (offset_ts.tv_nsec >= 0) return;
398 offset_ts.tv_nsec += 1000*1000*1000;
403 /* Exim uses a time + a pid to generate a unique identifier in two places: its
404 message IDs, and in file names for maildir deliveries. Because some OS now
405 re-use pids within the same second, sub-second times are now being used.
406 However, for absolute certainty, we must ensure the clock has ticked before
407 allowing the relevant process to complete. At the time of implementation of
408 this code (February 2003), the speed of processors is such that the clock will
409 invariably have ticked already by the time a process has done its job. This
410 function prepares for the time when things are faster - and it also copes with
411 clocks that go backwards.
414 tgt_tv A timeval which was used to create uniqueness; its usec field
415 has been rounded down to the value of the resolution.
416 We want to be sure the current time is greater than this.
417 resolution The resolution that was used to divide the microseconds
418 (1 for maildir, larger for message ids)
424 exim_wait_tick(struct timeval * tgt_tv, int resolution)
426 struct timeval now_tv;
427 long int now_true_usec;
429 #ifdef _POSIX_MONOTONIC_CLOCK
430 struct timespec now_ts;
432 if (clock_gettime(CLOCK_MONOTONIC, &now_ts) == 0)
434 now_ts.tv_sec += offset_ts.tv_sec;
435 if ((now_ts.tv_nsec += offset_ts.tv_nsec) >= 1000*1000*1000)
438 now_ts.tv_nsec -= 1000*1000*1000;
440 now_tv.tv_sec = now_ts.tv_sec;
441 now_true_usec = (now_ts.tv_nsec / (resolution * 1000)) * resolution;
442 now_tv.tv_usec = now_true_usec;
447 (void)gettimeofday(&now_tv, NULL);
448 now_true_usec = now_tv.tv_usec;
449 now_tv.tv_usec = (now_true_usec/resolution) * resolution;
452 while (exim_tvcmp(&now_tv, tgt_tv) <= 0)
454 struct itimerval itval;
455 itval.it_interval.tv_sec = 0;
456 itval.it_interval.tv_usec = 0;
457 itval.it_value.tv_sec = tgt_tv->tv_sec - now_tv.tv_sec;
458 itval.it_value.tv_usec = tgt_tv->tv_usec + resolution - now_true_usec;
460 /* We know that, overall, "now" is less than or equal to "then". Therefore, a
461 negative value for the microseconds is possible only in the case when "now"
462 is more than a second less than "tgt". That means that itval.it_value.tv_sec
463 is greater than zero. The following correction is therefore safe. */
465 if (itval.it_value.tv_usec < 0)
467 itval.it_value.tv_usec += 1000000;
468 itval.it_value.tv_sec -= 1;
471 DEBUG(D_transport|D_receive)
473 if (!f.running_in_test_harness)
475 debug_printf("tick check: " TIME_T_FMT ".%06lu " TIME_T_FMT ".%06lu\n",
476 tgt_tv->tv_sec, (long) tgt_tv->tv_usec,
477 now_tv.tv_sec, (long) now_tv.tv_usec);
478 debug_printf("waiting " TIME_T_FMT ".%06lu sec\n",
479 itval.it_value.tv_sec, (long) itval.it_value.tv_usec);
485 /* Be prapared to go around if the kernel does not implement subtick
486 granularity (GNU Hurd) */
488 (void)gettimeofday(&now_tv, NULL);
489 now_true_usec = now_tv.tv_usec;
490 now_tv.tv_usec = (now_true_usec/resolution) * resolution;
497 /*************************************************
498 * Call fopen() with umask 777 and adjust mode *
499 *************************************************/
501 /* Exim runs with umask(0) so that files created with open() have the mode that
502 is specified in the open() call. However, there are some files, typically in
503 the spool directory, that are created with fopen(). They end up world-writeable
504 if no precautions are taken. Although the spool directory is not accessible to
505 the world, this is an untidiness. So this is a wrapper function for fopen()
506 that sorts out the mode of the created file.
509 filename the file name
510 options the fopen() options
511 mode the required mode
513 Returns: the fopened FILE or NULL
517 modefopen(const uschar *filename, const char *options, mode_t mode)
519 mode_t saved_umask = umask(0777);
520 FILE *f = Ufopen(filename, options);
521 (void)umask(saved_umask);
522 if (f != NULL) (void)fchmod(fileno(f), mode);
527 /*************************************************
528 * Ensure stdin, stdout, and stderr exist *
529 *************************************************/
531 /* Some operating systems grumble if an exec() happens without a standard
532 input, output, and error (fds 0, 1, 2) being defined. The worry is that some
533 file will be opened and will use these fd values, and then some other bit of
534 code will assume, for example, that it can write error messages to stderr.
535 This function ensures that fds 0, 1, and 2 are open if they do not already
536 exist, by connecting them to /dev/null.
538 This function is also used to ensure that std{in,out,err} exist at all times,
539 so that if any library that Exim calls tries to use them, it doesn't crash.
550 for (int i = 0; i <= 2; i++)
552 if (fstat(i, &statbuf) < 0 && errno == EBADF)
554 if (devnull < 0) devnull = open("/dev/null", O_RDWR);
555 if (devnull < 0) log_write(0, LOG_MAIN|LOG_PANIC_DIE, "%s",
556 string_open_failed(errno, "/dev/null", NULL));
557 if (devnull != i) (void)dup2(devnull, i);
560 if (devnull > 2) (void)close(devnull);
566 /*************************************************
567 * Close unwanted file descriptors for delivery *
568 *************************************************/
570 /* This function is called from a new process that has been forked to deliver
571 an incoming message, either directly, or using exec.
573 We want any smtp input streams to be closed in this new process. However, it
574 has been observed that using fclose() here causes trouble. When reading in -bS
575 input, duplicate copies of messages have been seen. The files will be sharing a
576 file pointer with the parent process, and it seems that fclose() (at least on
577 some systems - I saw this on Solaris 2.5.1) messes with that file pointer, at
578 least sometimes. Hence we go for closing the underlying file descriptors.
580 If TLS is active, we want to shut down the TLS library, but without molesting
581 the parent's SSL connection.
583 For delivery of a non-SMTP message, we want to close stdin and stdout (and
584 stderr unless debugging) because the calling process might have set them up as
585 pipes and be waiting for them to close before it waits for the submission
586 process to terminate. If they aren't closed, they hold up the calling process
587 until the initial delivery process finishes, which is not what we want.
589 Exception: We do want it for synchronous delivery!
591 And notwithstanding all the above, if D_resolver is set, implying resolver
592 debugging, leave stdout open, because that's where the resolver writes its
595 When we close stderr (which implies we've also closed stdout), we also get rid
596 of any controlling terminal.
608 tls_close(NULL, TLS_NO_SHUTDOWN); /* Shut down the TLS library */
610 (void)close(fileno(smtp_in));
611 (void)close(fileno(smtp_out));
616 (void)close(0); /* stdin */
617 if ((debug_selector & D_resolver) == 0) (void)close(1); /* stdout */
618 if (debug_selector == 0) /* stderr */
620 if (!f.synchronous_delivery)
633 /*************************************************
635 *************************************************/
637 /* This function sets a new uid and gid permanently, optionally calling
638 initgroups() to set auxiliary groups. There are some special cases when running
639 Exim in unprivileged modes. In these situations the effective uid will not be
640 root; if we already have the right effective uid/gid, and don't need to
641 initialize any groups, leave things as they are.
646 igflag TRUE if initgroups() wanted
647 msg text to use in debugging output and failure log
649 Returns: nothing; bombs out on failure
653 exim_setugid(uid_t uid, gid_t gid, BOOL igflag, uschar *msg)
655 uid_t euid = geteuid();
656 gid_t egid = getegid();
658 if (euid == root_uid || euid != uid || egid != gid || igflag)
660 /* At least one OS returns +1 for initgroups failure, so just check for
665 struct passwd *pw = getpwuid(uid);
667 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "cannot run initgroups(): "
668 "no passwd entry for uid=%ld", (long int)uid);
670 if (initgroups(pw->pw_name, gid) != 0)
671 log_write(0,LOG_MAIN|LOG_PANIC_DIE,"initgroups failed for uid=%ld: %s",
672 (long int)uid, strerror(errno));
675 if (setgid(gid) < 0 || setuid(uid) < 0)
676 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "unable to set gid=%ld or uid=%ld "
677 "(euid=%ld): %s", (long int)gid, (long int)uid, (long int)euid, msg);
680 /* Debugging output included uid/gid and all groups */
684 int group_count, save_errno;
685 gid_t group_list[EXIM_GROUPLIST_SIZE];
686 debug_printf("changed uid/gid: %s\n uid=%ld gid=%ld pid=%ld\n", msg,
687 (long int)geteuid(), (long int)getegid(), (long int)getpid());
688 group_count = getgroups(nelem(group_list), group_list);
690 debug_printf(" auxiliary group list:");
692 for (int i = 0; i < group_count; i++) debug_printf(" %d", (int)group_list[i]);
693 else if (group_count < 0)
694 debug_printf(" <error: %s>", strerror(save_errno));
695 else debug_printf(" <none>");
703 /*************************************************
705 *************************************************/
707 /* Exim exits via this function so that it always clears up any open
713 Returns: does not return
717 exim_exit(int rc, const uschar * process)
722 debug_printf(">>>>>>>>>>>>>>>> Exim pid=%d %s%s%sterminating with rc=%d "
723 ">>>>>>>>>>>>>>>>\n", (int)getpid(),
724 process ? "(" : "", process, process ? ") " : "", rc);
730 exim_underbar_exit(int rc, const uschar * process)
734 debug_printf(">>>>>>>>>>>>>>>> Exim pid=%d %s%s%sterminating with rc=%d "
735 ">>>>>>>>>>>>>>>>\n", (int)getpid(),
736 process ? "(" : "", process, process ? ") " : "", rc);
742 /* Print error string, then die */
744 exim_fail(const char * fmt, ...)
748 vfprintf(stderr, fmt, ap);
752 /* exim_chown_failure() called from exim_chown()/exim_fchown() on failure
753 of chown()/fchown(). See src/functions.h for more explanation */
755 exim_chown_failure(int fd, const uschar *name, uid_t owner, gid_t group)
757 int saved_errno = errno; /* from the preceeding chown call */
759 log_write(0, LOG_MAIN|LOG_PANIC,
760 __FILE__ ":%d: chown(%s, %d:%d) failed (%s)."
761 " Please contact the authors and refer to https://bugs.exim.org/show_bug.cgi?id=2391",
762 __LINE__, name?name:US"<unknown>", owner, group, strerror(errno));
764 /* I leave this here, commented, in case the "bug"(?) comes up again.
765 It is not an Exim bug, but we can provide a workaround.
771 if (0 == (fd < 0 ? stat(name, &buf) : fstat(fd, &buf)))
773 if (buf.st_uid == owner && buf.st_gid == group) return 0;
774 log_write(0, LOG_MAIN|LOG_PANIC, "Wrong ownership on %s", name);
776 else log_write(0, LOG_MAIN|LOG_PANIC, "Stat failed on %s: %s", name, strerror(errno));
784 /*************************************************
785 * Extract port from host address *
786 *************************************************/
788 /* Called to extract the port from the values given to -oMa and -oMi.
789 It also checks the syntax of the address, and terminates it before the
790 port data when a port is extracted.
793 address the address, with possible port on the end
795 Returns: the port, or zero if there isn't one
796 bombs out on a syntax error
800 check_port(uschar *address)
802 int port = host_address_extract_port(address);
803 if (string_is_ip_address(address, NULL) == 0)
804 exim_fail("exim abandoned: \"%s\" is not an IP address\n", address);
810 /*************************************************
811 * Test/verify an address *
812 *************************************************/
814 /* This function is called by the -bv and -bt code. It extracts a working
815 address from a full RFC 822 address. This isn't really necessary per se, but it
816 has the effect of collapsing source routes.
820 flags flag bits for verify_address()
821 exit_value to be set for failures
827 test_address(uschar *s, int flags, int *exit_value)
829 int start, end, domain;
830 uschar *parse_error = NULL;
831 uschar *address = parse_extract_address(s, &parse_error, &start, &end, &domain,
835 fprintf(stdout, "syntax error: %s\n", parse_error);
840 int rc = verify_address(deliver_make_addr(address,TRUE), stdout, flags, -1,
841 -1, -1, NULL, NULL, NULL);
842 if (rc == FAIL) *exit_value = 2;
843 else if (rc == DEFER && *exit_value == 0) *exit_value = 1;
849 /*************************************************
850 * Show supported features *
851 *************************************************/
854 show_db_version(FILE * f)
856 #ifdef DB_VERSION_STRING
859 fprintf(f, "Library version: BDB: Compile: %s\n", DB_VERSION_STRING);
860 fprintf(f, " Runtime: %s\n",
861 db_version(NULL, NULL, NULL));
864 fprintf(f, "Berkeley DB: %s\n", DB_VERSION_STRING);
866 #elif defined(BTREEVERSION) && defined(HASHVERSION)
868 fprintf(f, "Probably Berkeley DB version 1.8x (native mode)\n");
870 fprintf(f, "Probably Berkeley DB version 1.8x (compatibility mode)\n");
873 #elif defined(_DBM_RDONLY) || defined(dbm_dirfno)
874 fprintf(f, "Probably ndbm\n");
875 #elif defined(USE_TDB)
876 fprintf(f, "Using tdb\n");
879 fprintf(f, "Probably GDBM (native mode)\n");
881 fprintf(f, "Probably GDBM (compatibility mode)\n");
887 /* This function is called for -bV/--version and for -d to output the optional
888 features of the current Exim binary.
890 Arguments: a FILE for printing
895 show_whats_supported(FILE * fp)
897 DEBUG(D_any) {} else show_db_version(fp);
899 fprintf(fp, "Support for:");
900 #ifdef SUPPORT_CRYPTEQ
901 fprintf(fp, " crypteq");
904 fprintf(fp, " iconv()");
907 fprintf(fp, " IPv6");
909 #ifdef HAVE_SETCLASSRESOURCES
910 fprintf(fp, " use_setclassresources");
916 fprintf(fp, " Perl");
919 fprintf(fp, " Expand_dlfunc");
921 #ifdef USE_TCP_WRAPPERS
922 fprintf(fp, " TCPwrappers");
925 fprintf(fp, " GnuTLS");
928 fprintf(fp, " OpenSSL");
930 #ifdef SUPPORT_TRANSLATE_IP_ADDRESS
931 fprintf(fp, " translate_ip_address");
933 #ifdef SUPPORT_MOVE_FROZEN_MESSAGES
934 fprintf(fp, " move_frozen_messages");
936 #ifdef WITH_CONTENT_SCAN
937 fprintf(fp, " Content_Scanning");
940 fprintf(fp, " DANE");
943 fprintf(fp, " DKIM");
945 #ifndef DISABLE_DNSSEC
946 fprintf(fp, " DNSSEC");
948 #ifndef DISABLE_EVENT
949 fprintf(fp, " Event");
952 fprintf(fp, " I18N");
955 fprintf(fp, " OCSP");
957 #ifndef DISABLE_PIPE_CONNECT
958 fprintf(fp, " PIPE_CONNECT");
961 fprintf(fp, " PRDR");
964 fprintf(fp, " PROXY");
967 fprintf(fp, " SOCKS");
973 fprintf(fp, " DMARC");
977 if (f.tcp_fastopen_ok) fprintf(fp, " TCP_Fast_Open");
979 #ifdef EXPERIMENTAL_ARC
980 fprintf(fp, " Experimental_ARC");
982 #ifdef EXPERIMENTAL_BRIGHTMAIL
983 fprintf(fp, " Experimental_Brightmail");
985 #ifdef EXPERIMENTAL_DCC
986 fprintf(fp, " Experimental_DCC");
988 #ifdef EXPERIMENTAL_DSN_INFO
989 fprintf(fp, " Experimental_DSN_info");
991 #ifdef EXPERIMENTAL_LMDB
992 fprintf(fp, " Experimental_LMDB");
994 #ifdef EXPERIMENTAL_QUEUE_RAMP
995 fprintf(fp, " Experimental_Queue_Ramp");
997 #ifdef EXPERIMENTAL_QUEUEFILE
998 fprintf(fp, " Experimental_QUEUEFILE");
1000 #if defined(EXPERIMENTAL_SRS) || defined(EXPERIMENTAL_SRS_NATIVE)
1001 fprintf(fp, " Experimental_SRS");
1003 #ifdef EXPERIMENTAL_TLS_RESUME
1004 fprintf(fp, " Experimental_TLS_resume");
1008 fprintf(fp, "Lookups (built-in):");
1009 #if defined(LOOKUP_LSEARCH) && LOOKUP_LSEARCH!=2
1010 fprintf(fp, " lsearch wildlsearch nwildlsearch iplsearch");
1012 #if defined(LOOKUP_CDB) && LOOKUP_CDB!=2
1013 fprintf(fp, " cdb");
1015 #if defined(LOOKUP_DBM) && LOOKUP_DBM!=2
1016 fprintf(fp, " dbm dbmjz dbmnz");
1018 #if defined(LOOKUP_DNSDB) && LOOKUP_DNSDB!=2
1019 fprintf(fp, " dnsdb");
1021 #if defined(LOOKUP_DSEARCH) && LOOKUP_DSEARCH!=2
1022 fprintf(fp, " dsearch");
1024 #if defined(LOOKUP_IBASE) && LOOKUP_IBASE!=2
1025 fprintf(fp, " ibase");
1027 #if defined(LOOKUP_JSON) && LOOKUP_JSON!=2
1028 fprintf(fp, " json");
1030 #if defined(LOOKUP_LDAP) && LOOKUP_LDAP!=2
1031 fprintf(fp, " ldap ldapdn ldapm");
1033 #ifdef EXPERIMENTAL_LMDB
1034 fprintf(fp, " lmdb");
1036 #if defined(LOOKUP_MYSQL) && LOOKUP_MYSQL!=2
1037 fprintf(fp, " mysql");
1039 #if defined(LOOKUP_NIS) && LOOKUP_NIS!=2
1040 fprintf(fp, " nis nis0");
1042 #if defined(LOOKUP_NISPLUS) && LOOKUP_NISPLUS!=2
1043 fprintf(fp, " nisplus");
1045 #if defined(LOOKUP_ORACLE) && LOOKUP_ORACLE!=2
1046 fprintf(fp, " oracle");
1048 #if defined(LOOKUP_PASSWD) && LOOKUP_PASSWD!=2
1049 fprintf(fp, " passwd");
1051 #if defined(LOOKUP_PGSQL) && LOOKUP_PGSQL!=2
1052 fprintf(fp, " pgsql");
1054 #if defined(LOOKUP_REDIS) && LOOKUP_REDIS!=2
1055 fprintf(fp, " redis");
1057 #if defined(LOOKUP_SQLITE) && LOOKUP_SQLITE!=2
1058 fprintf(fp, " sqlite");
1060 #if defined(LOOKUP_TESTDB) && LOOKUP_TESTDB!=2
1061 fprintf(fp, " testdb");
1063 #if defined(LOOKUP_WHOSON) && LOOKUP_WHOSON!=2
1064 fprintf(fp, " whoson");
1068 auth_show_supported(fp);
1069 route_show_supported(fp);
1070 transport_show_supported(fp);
1072 #ifdef WITH_CONTENT_SCAN
1073 malware_show_supported(fp);
1076 if (fixed_never_users[0] > 0)
1079 fprintf(fp, "Fixed never_users: ");
1080 for (i = 1; i <= (int)fixed_never_users[0] - 1; i++)
1081 fprintf(fp, "%d:", (unsigned int)fixed_never_users[i]);
1082 fprintf(fp, "%d\n", (unsigned int)fixed_never_users[i]);
1085 fprintf(fp, "Configure owner: %d:%d\n", config_uid, config_gid);
1087 fprintf(fp, "Size of off_t: " SIZE_T_FMT "\n", sizeof(off_t));
1089 /* Everything else is details which are only worth reporting when debugging.
1090 Perhaps the tls_version_report should move into this too. */
1093 /* clang defines __GNUC__ (at least, for me) so test for it first */
1094 #if defined(__clang__)
1095 fprintf(fp, "Compiler: CLang [%s]\n", __clang_version__);
1096 #elif defined(__GNUC__)
1097 fprintf(fp, "Compiler: GCC [%s]\n",
1101 "? unknown version ?"
1105 fprintf(fp, "Compiler: <unknown>\n");
1108 #if defined(__GLIBC__) && !defined(__UCLIBC__)
1109 fprintf(fp, "Library version: Glibc: Compile: %d.%d\n",
1110 __GLIBC__, __GLIBC_MINOR__);
1111 if (__GLIBC_PREREQ(2, 1))
1112 fprintf(fp, " Runtime: %s\n",
1113 gnu_get_libc_version());
1116 show_db_version(fp);
1119 tls_version_report(fp);
1122 utf8_version_report(fp);
1125 spf_lib_version_report(fp);
1128 for (auth_info * authi = auths_available; *authi->driver_name != '\0'; ++authi)
1129 if (authi->version_report)
1130 (*authi->version_report)(fp);
1132 /* PCRE_PRERELEASE is either defined and empty or a bare sequence of
1133 characters; unless it's an ancient version of PCRE in which case it
1135 #ifndef PCRE_PRERELEASE
1136 # define PCRE_PRERELEASE
1139 #define EXPAND_AND_QUOTE(X) QUOTE(X)
1140 fprintf(fp, "Library version: PCRE: Compile: %d.%d%s\n"
1142 PCRE_MAJOR, PCRE_MINOR,
1143 EXPAND_AND_QUOTE(PCRE_PRERELEASE) "",
1146 #undef EXPAND_AND_QUOTE
1149 for (int i = 0; i < lookup_list_count; i++)
1150 if (lookup_list[i]->version_report)
1151 lookup_list[i]->version_report(fp);
1153 #ifdef WHITELIST_D_MACROS
1154 fprintf(fp, "WHITELIST_D_MACROS: \"%s\"\n", WHITELIST_D_MACROS);
1156 fprintf(fp, "WHITELIST_D_MACROS unset\n");
1158 #ifdef TRUSTED_CONFIG_LIST
1159 fprintf(fp, "TRUSTED_CONFIG_LIST: \"%s\"\n", TRUSTED_CONFIG_LIST);
1161 fprintf(fp, "TRUSTED_CONFIG_LIST unset\n");
1168 /*************************************************
1169 * Show auxiliary information about Exim *
1170 *************************************************/
1173 show_exim_information(enum commandline_info request, FILE *stream)
1178 fprintf(stream, "Oops, something went wrong.\n");
1182 "The -bI: flag takes a string indicating which information to provide.\n"
1183 "If the string is not recognised, you'll get this help (on stderr).\n"
1185 " exim -bI:help this information\n"
1186 " exim -bI:dscp list of known dscp value keywords\n"
1187 " exim -bI:sieve list of supported sieve extensions\n"
1191 for (const uschar ** pp = exim_sieve_extension_list; *pp; ++pp)
1192 fprintf(stream, "%s\n", *pp);
1195 dscp_list_to_stream(stream);
1201 /*************************************************
1202 * Quote a local part *
1203 *************************************************/
1205 /* This function is used when a sender address or a From: or Sender: header
1206 line is being created from the caller's login, or from an authenticated_id. It
1207 applies appropriate quoting rules for a local part.
1209 Argument: the local part
1210 Returns: the local part, quoted if necessary
1214 local_part_quote(uschar *lpart)
1216 BOOL needs_quote = FALSE;
1219 for (uschar * t = lpart; !needs_quote && *t != 0; t++)
1221 needs_quote = !isalnum(*t) && strchr("!#$%&'*+-/=?^_`{|}~", *t) == NULL &&
1222 (*t != '.' || t == lpart || t[1] == 0);
1225 if (!needs_quote) return lpart;
1227 g = string_catn(NULL, US"\"", 1);
1231 uschar *nq = US Ustrpbrk(lpart, "\\\"");
1234 g = string_cat(g, lpart);
1237 g = string_catn(g, lpart, nq - lpart);
1238 g = string_catn(g, US"\\", 1);
1239 g = string_catn(g, nq, 1);
1243 g = string_catn(g, US"\"", 1);
1244 return string_from_gstring(g);
1250 /*************************************************
1251 * Load readline() functions *
1252 *************************************************/
1254 /* This function is called from testing executions that read data from stdin,
1255 but only when running as the calling user. Currently, only -be does this. The
1256 function loads the readline() function library and passes back the functions.
1257 On some systems, it needs the curses library, so load that too, but try without
1258 it if loading fails. All this functionality has to be requested at build time.
1261 fn_readline_ptr pointer to where to put the readline pointer
1262 fn_addhist_ptr pointer to where to put the addhistory function
1264 Returns: the dlopen handle or NULL on failure
1268 set_readline(char * (**fn_readline_ptr)(const char *),
1269 void (**fn_addhist_ptr)(const char *))
1272 void *dlhandle_curses = dlopen("libcurses." DYNLIB_FN_EXT, RTLD_GLOBAL|RTLD_LAZY);
1274 dlhandle = dlopen("libreadline." DYNLIB_FN_EXT, RTLD_GLOBAL|RTLD_NOW);
1275 if (dlhandle_curses) dlclose(dlhandle_curses);
1279 /* Checked manual pages; at least in GNU Readline 6.1, the prototypes are:
1280 * char * readline (const char *prompt);
1281 * void add_history (const char *string);
1283 *fn_readline_ptr = (char *(*)(const char*))dlsym(dlhandle, "readline");
1284 *fn_addhist_ptr = (void(*)(const char*))dlsym(dlhandle, "add_history");
1287 DEBUG(D_any) debug_printf("failed to load readline: %s\n", dlerror());
1295 /*************************************************
1296 * Get a line from stdin for testing things *
1297 *************************************************/
1299 /* This function is called when running tests that can take a number of lines
1300 of input (for example, -be and -bt). It handles continuations and trailing
1301 spaces. And prompting and a blank line output on eof. If readline() is in use,
1302 the arguments are non-NULL and provide the relevant functions.
1305 fn_readline readline function or NULL
1306 fn_addhist addhist function or NULL
1308 Returns: pointer to dynamic memory, or NULL at end of file
1312 get_stdinput(char *(*fn_readline)(const char *), void(*fn_addhist)(const char *))
1316 if (!fn_readline) { printf("> "); fflush(stdout); }
1318 for (int i = 0;; i++)
1320 uschar buffer[1024];
1324 char *readline_line = NULL;
1327 if (!(readline_line = fn_readline((i > 0)? "":"> "))) break;
1328 if (*readline_line != 0 && fn_addhist) fn_addhist(readline_line);
1329 p = US readline_line;
1334 /* readline() not in use */
1337 if (Ufgets(buffer, sizeof(buffer), stdin) == NULL) break;
1341 /* Handle the line */
1343 ss = p + (int)Ustrlen(p);
1344 while (ss > p && isspace(ss[-1])) ss--;
1347 while (p < ss && isspace(*p)) p++; /* leading space after cont */
1349 g = string_catn(g, p, ss - p);
1352 if (fn_readline) free(readline_line);
1355 /* g can only be NULL if ss==p */
1356 if (ss == p || g->s[g->ptr-1] != '\\')
1360 (void) string_from_gstring(g);
1363 if (!g) printf("\n");
1364 return string_from_gstring(g);
1369 /*************************************************
1370 * Output usage information for the program *
1371 *************************************************/
1373 /* This function is called when there are no recipients
1374 or a specific --help argument was added.
1377 progname information on what name we were called by
1379 Returns: DOES NOT RETURN
1383 exim_usage(uschar *progname)
1386 /* Handle specific program invocation variants */
1387 if (Ustrcmp(progname, US"-mailq") == 0)
1389 "mailq - list the contents of the mail queue\n\n"
1390 "For a list of options, see the Exim documentation.\n");
1392 /* Generic usage - we output this whatever happens */
1394 "Exim is a Mail Transfer Agent. It is normally called by Mail User Agents,\n"
1395 "not directly from a shell command line. Options and/or arguments control\n"
1396 "what it does when called. For a list of options, see the Exim documentation.\n");
1401 /*************************************************
1402 * Validate that the macros given are okay *
1403 *************************************************/
1405 /* Typically, Exim will drop privileges if macros are supplied. In some
1406 cases, we want to not do so.
1408 Arguments: opt_D_used - true if the commandline had a "-D" option
1409 Returns: true if trusted, false otherwise
1413 macros_trusted(BOOL opt_D_used)
1415 #ifdef WHITELIST_D_MACROS
1416 uschar *whitelisted, *end, *p, **whites;
1417 int white_count, i, n;
1419 BOOL prev_char_item, found;
1424 #ifndef WHITELIST_D_MACROS
1428 /* We only trust -D overrides for some invoking users:
1429 root, the exim run-time user, the optional config owner user.
1430 I don't know why config-owner would be needed, but since they can own the
1431 config files anyway, there's no security risk to letting them override -D. */
1432 if ( ! ((real_uid == root_uid)
1433 || (real_uid == exim_uid)
1434 #ifdef CONFIGURE_OWNER
1435 || (real_uid == config_uid)
1439 debug_printf("macros_trusted rejecting macros for uid %d\n", (int) real_uid);
1443 /* Get a list of macros which are whitelisted */
1444 whitelisted = string_copy_perm(US WHITELIST_D_MACROS, FALSE);
1445 prev_char_item = FALSE;
1447 for (p = whitelisted; *p != '\0'; ++p)
1449 if (*p == ':' || isspace(*p))
1454 prev_char_item = FALSE;
1457 if (!prev_char_item)
1458 prev_char_item = TRUE;
1465 whites = store_malloc(sizeof(uschar *) * (white_count+1));
1466 for (p = whitelisted, i = 0; (p != end) && (i < white_count); ++p)
1471 if (i == white_count)
1473 while (*p != '\0' && p < end)
1479 /* The list of commandline macros should be very short.
1480 Accept the N*M complexity. */
1481 for (macro_item * m = macros_user; m; m = m->next) if (m->command_line)
1484 for (uschar ** w = whites; *w; ++w)
1485 if (Ustrcmp(*w, m->name) == 0)
1492 if (!m->replacement)
1494 if ((len = m->replen) == 0)
1496 n = pcre_exec(regex_whitelisted_macro, NULL, CS m->replacement, len,
1497 0, PCRE_EOPT, NULL, 0);
1500 if (n != PCRE_ERROR_NOMATCH)
1501 debug_printf("macros_trusted checking %s returned %d\n", m->name, n);
1505 DEBUG(D_any) debug_printf("macros_trusted overridden to true by whitelisting\n");
1511 /*************************************************
1512 * Expansion testing *
1513 *************************************************/
1515 /* Expand and print one item, doing macro-processing.
1518 item line for expansion
1522 expansion_test_line(uschar * line)
1527 Ustrncpy(big_buffer, line, big_buffer_size);
1528 big_buffer[big_buffer_size-1] = '\0';
1529 len = Ustrlen(big_buffer);
1531 (void) macros_expand(0, &len, &dummy_macexp);
1533 if (isupper(big_buffer[0]))
1535 if (macro_read_assignment(big_buffer))
1536 printf("Defined macro '%s'\n", mlast->name);
1539 if ((line = expand_string(big_buffer))) printf("%s\n", CS line);
1540 else printf("Failed: %s\n", expand_string_message);
1545 /*************************************************
1546 * Entry point and high-level code *
1547 *************************************************/
1549 /* Entry point for the Exim mailer. Analyse the arguments and arrange to take
1550 the appropriate action. All the necessary functions are present in the one
1551 binary. I originally thought one should split it up, but it turns out that so
1552 much of the apparatus is needed in each chunk that one might as well just have
1553 it all available all the time, which then makes the coding easier as well.
1556 argc count of entries in argv
1557 argv argument strings, with argv[0] being the program name
1559 Returns: EXIT_SUCCESS if terminated successfully
1560 EXIT_FAILURE otherwise, except when a message has been sent
1561 to the sender, and -oee was given
1565 main(int argc, char **cargv)
1567 uschar **argv = USS cargv;
1568 int arg_receive_timeout = -1;
1569 int arg_smtp_receive_timeout = -1;
1570 int arg_error_handling = error_handling;
1571 int filter_sfd = -1;
1572 int filter_ufd = -1;
1575 int list_queue_option = 0;
1577 int msg_action_arg = -1;
1578 int namelen = (argv[0] == NULL)? 0 : Ustrlen(argv[0]);
1579 int queue_only_reason = 0;
1581 int perl_start_option = 0;
1583 int recipients_arg = argc;
1584 int sender_address_domain = 0;
1585 int test_retry_arg = -1;
1586 int test_rewrite_arg = -1;
1587 gid_t original_egid;
1588 BOOL arg_queue_only = FALSE;
1589 BOOL bi_option = FALSE;
1590 BOOL checking = FALSE;
1591 BOOL count_queue = FALSE;
1592 BOOL expansion_test = FALSE;
1593 BOOL extract_recipients = FALSE;
1594 BOOL flag_G = FALSE;
1595 BOOL flag_n = FALSE;
1596 BOOL forced_delivery = FALSE;
1597 BOOL f_end_dot = FALSE;
1598 BOOL deliver_give_up = FALSE;
1599 BOOL list_queue = FALSE;
1600 BOOL list_options = FALSE;
1601 BOOL list_config = FALSE;
1602 BOOL local_queue_only;
1604 BOOL one_msg_action = FALSE;
1605 BOOL opt_D_used = FALSE;
1606 BOOL queue_only_set = FALSE;
1607 BOOL receiving_message = TRUE;
1608 BOOL sender_ident_set = FALSE;
1609 BOOL session_local_queue_only;
1611 BOOL removed_privilege = FALSE;
1612 BOOL usage_wanted = FALSE;
1613 BOOL verify_address_mode = FALSE;
1614 BOOL verify_as_sender = FALSE;
1615 BOOL version_printed = FALSE;
1616 uschar *alias_arg = NULL;
1617 uschar *called_as = US"";
1618 uschar *cmdline_syslog_name = NULL;
1619 uschar *start_queue_run_id = NULL;
1620 uschar *stop_queue_run_id = NULL;
1621 uschar *expansion_test_message = NULL;
1622 uschar *ftest_domain = NULL;
1623 uschar *ftest_localpart = NULL;
1624 uschar *ftest_prefix = NULL;
1625 uschar *ftest_suffix = NULL;
1626 uschar *log_oneline = NULL;
1627 uschar *malware_test_file = NULL;
1628 uschar *real_sender_address;
1629 uschar *originator_home = US"/";
1634 struct stat statbuf;
1635 pid_t passed_qr_pid = (pid_t)0;
1636 int passed_qr_pipe = -1;
1637 gid_t group_list[EXIM_GROUPLIST_SIZE];
1639 /* For the -bI: flag */
1640 enum commandline_info info_flag = CMDINFO_NONE;
1641 BOOL info_stdout = FALSE;
1643 /* Possible options for -R and -S */
1645 static uschar *rsopts[] = { US"f", US"ff", US"r", US"rf", US"rff" };
1647 /* Need to define this in case we need to change the environment in order
1648 to get rid of a bogus time zone. We have to make it char rather than uschar
1649 because some OS define it in /usr/include/unistd.h. */
1651 extern char **environ;
1653 #ifdef MEASURE_TIMING
1654 (void)gettimeofday(×tamp_startup, NULL);
1657 /* If the Exim user and/or group and/or the configuration file owner/group were
1658 defined by ref:name at build time, we must now find the actual uid/gid values.
1659 This is a feature to make the lives of binary distributors easier. */
1661 #ifdef EXIM_USERNAME
1662 if (route_finduser(US EXIM_USERNAME, &pw, &exim_uid))
1665 exim_fail("exim: refusing to run with uid 0 for \"%s\"\n", EXIM_USERNAME);
1667 /* If ref:name uses a number as the name, route_finduser() returns
1668 TRUE with exim_uid set and pw coerced to NULL. */
1670 exim_gid = pw->pw_gid;
1671 #ifndef EXIM_GROUPNAME
1674 "exim: ref:name should specify a usercode, not a group.\n"
1675 "exim: can't let you get away with it unless you also specify a group.\n");
1679 exim_fail("exim: failed to find uid for user name \"%s\"\n", EXIM_USERNAME);
1682 #ifdef EXIM_GROUPNAME
1683 if (!route_findgroup(US EXIM_GROUPNAME, &exim_gid))
1684 exim_fail("exim: failed to find gid for group name \"%s\"\n", EXIM_GROUPNAME);
1687 #ifdef CONFIGURE_OWNERNAME
1688 if (!route_finduser(US CONFIGURE_OWNERNAME, NULL, &config_uid))
1689 exim_fail("exim: failed to find uid for user name \"%s\"\n",
1690 CONFIGURE_OWNERNAME);
1693 /* We default the system_filter_user to be the Exim run-time user, as a
1694 sane non-root value. */
1695 system_filter_uid = exim_uid;
1697 #ifdef CONFIGURE_GROUPNAME
1698 if (!route_findgroup(US CONFIGURE_GROUPNAME, &config_gid))
1699 exim_fail("exim: failed to find gid for group name \"%s\"\n",
1700 CONFIGURE_GROUPNAME);
1703 /* In the Cygwin environment, some initialization used to need doing.
1704 It was fudged in by means of this macro; now no longer but we'll leave
1705 it in case of others. */
1711 /* Check a field which is patched when we are running Exim within its
1712 testing harness; do a fast initial check, and then the whole thing. */
1714 f.running_in_test_harness =
1715 *running_status == '<' && Ustrcmp(running_status, "<<<testing>>>") == 0;
1716 if (f.running_in_test_harness)
1719 /* The C standard says that the equivalent of setlocale(LC_ALL, "C") is obeyed
1720 at the start of a program; however, it seems that some environments do not
1721 follow this. A "strange" locale can affect the formatting of timestamps, so we
1724 setlocale(LC_ALL, "C");
1726 /* Get the offset between CLOCK_MONOTONIC and wallclock */
1728 #ifdef _POSIX_MONOTONIC_CLOCK
1732 /* Set up the default handler for timing using alarm(). */
1734 os_non_restarting_signal(SIGALRM, sigalrm_handler);
1736 /* Ensure we have a buffer for constructing log entries. Use malloc directly,
1737 because store_malloc writes a log entry on failure. */
1739 if (!(log_buffer = US malloc(LOG_BUFFER_SIZE)))
1740 exim_fail("exim: failed to get store for log buffer\n");
1742 /* Initialize the default log options. */
1744 bits_set(log_selector, log_selector_size, log_default);
1746 /* Set log_stderr to stderr, provided that stderr exists. This gets reset to
1747 NULL when the daemon is run and the file is closed. We have to use this
1748 indirection, because some systems don't allow writing to the variable "stderr".
1751 if (fstat(fileno(stderr), &statbuf) >= 0) log_stderr = stderr;
1753 /* Arrange for the PCRE regex library to use our store functions. Note that
1754 the normal calls are actually macros that add additional arguments for
1755 debugging purposes so we have to assign specially constructed functions here.
1756 The default is to use store in the stacking pool, but this is overridden in the
1757 regex_must_compile() function. */
1759 pcre_malloc = function_store_get;
1760 pcre_free = function_dummy_free;
1762 /* Ensure there is a big buffer for temporary use in several places. It is put
1763 in malloc store so that it can be freed for enlargement if necessary. */
1765 big_buffer = store_malloc(big_buffer_size);
1767 /* Set up the handler for the data request signal, and set the initial
1768 descriptive text. */
1770 process_info = store_get(PROCESS_INFO_SIZE, TRUE); /* tainted */
1771 set_process_info("initializing");
1772 os_restarting_signal(SIGUSR1, usr1_handler);
1774 /* If running in a dockerized environment, the TERM signal is only
1775 delegated to the PID 1 if we request it by setting an signal handler */
1776 if (getpid() == 1) signal(SIGTERM, term_handler);
1778 /* SIGHUP is used to get the daemon to reconfigure. It gets set as appropriate
1779 in the daemon code. For the rest of Exim's uses, we ignore it. */
1781 signal(SIGHUP, SIG_IGN);
1783 /* We don't want to die on pipe errors as the code is written to handle
1784 the write error instead. */
1786 signal(SIGPIPE, SIG_IGN);
1788 /* Under some circumstance on some OS, Exim can get called with SIGCHLD
1789 set to SIG_IGN. This causes subprocesses that complete before the parent
1790 process waits for them not to hang around, so when Exim calls wait(), nothing
1791 is there. The wait() code has been made robust against this, but let's ensure
1792 that SIGCHLD is set to SIG_DFL, because it's tidier to wait and get a process
1793 ending status. We use sigaction rather than plain signal() on those OS where
1794 SA_NOCLDWAIT exists, because we want to be sure it is turned off. (There was a
1795 problem on AIX with this.) */
1799 struct sigaction act;
1800 act.sa_handler = SIG_DFL;
1801 sigemptyset(&(act.sa_mask));
1803 sigaction(SIGCHLD, &act, NULL);
1806 signal(SIGCHLD, SIG_DFL);
1809 /* Save the arguments for use if we re-exec exim as a daemon after receiving
1814 /* Set up the version number. Set up the leading 'E' for the external form of
1815 message ids, set the pointer to the internal form, and initialize it to
1816 indicate no message being processed. */
1819 message_id_option[0] = '-';
1820 message_id_external = message_id_option + 1;
1821 message_id_external[0] = 'E';
1822 message_id = message_id_external + 1;
1825 /* Set the umask to zero so that any files Exim creates using open() are
1826 created with the modes that it specifies. NOTE: Files created with fopen() have
1827 a problem, which was not recognized till rather late (February 2006). With this
1828 umask, such files will be world writeable. (They are all content scanning files
1829 in the spool directory, which isn't world-accessible, so this is not a
1830 disaster, but it's untidy.) I don't want to change this overall setting,
1831 however, because it will interact badly with the open() calls. Instead, there's
1832 now a function called modefopen() that fiddles with the umask while calling
1837 /* Precompile the regular expression for matching a message id. Keep this in
1838 step with the code that generates ids in the accept.c module. We need to do
1839 this here, because the -M options check their arguments for syntactic validity
1840 using mac_ismsgid, which uses this. */
1843 regex_must_compile(US"^(?:[^\\W_]{6}-){2}[^\\W_]{2}$", FALSE, TRUE);
1845 /* Precompile the regular expression that is used for matching an SMTP error
1846 code, possibly extended, at the start of an error message. Note that the
1847 terminating whitespace character is included. */
1850 regex_must_compile(US"^\\d\\d\\d\\s(?:\\d\\.\\d\\d?\\d?\\.\\d\\d?\\d?\\s)?",
1853 #ifdef WHITELIST_D_MACROS
1854 /* Precompile the regular expression used to filter the content of macros
1855 given to -D for permissibility. */
1857 regex_whitelisted_macro =
1858 regex_must_compile(US"^[A-Za-z0-9_/.-]*$", FALSE, TRUE);
1861 for (i = 0; i < REGEX_VARS; i++) regex_vars[i] = NULL;
1863 /* If the program is called as "mailq" treat it as equivalent to "exim -bp";
1864 this seems to be a generally accepted convention, since one finds symbolic
1865 links called "mailq" in standard OS configurations. */
1867 if ((namelen == 5 && Ustrcmp(argv[0], "mailq") == 0) ||
1868 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/mailq", 6) == 0))
1871 receiving_message = FALSE;
1872 called_as = US"-mailq";
1875 /* If the program is called as "rmail" treat it as equivalent to
1876 "exim -i -oee", thus allowing UUCP messages to be input using non-SMTP mode,
1877 i.e. preventing a single dot on a line from terminating the message, and
1878 returning with zero return code, even in cases of error (provided an error
1879 message has been sent). */
1881 if ((namelen == 5 && Ustrcmp(argv[0], "rmail") == 0) ||
1882 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/rmail", 6) == 0))
1885 called_as = US"-rmail";
1886 errors_sender_rc = EXIT_SUCCESS;
1889 /* If the program is called as "rsmtp" treat it as equivalent to "exim -bS";
1890 this is a smail convention. */
1892 if ((namelen == 5 && Ustrcmp(argv[0], "rsmtp") == 0) ||
1893 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/rsmtp", 6) == 0))
1895 smtp_input = smtp_batched_input = TRUE;
1896 called_as = US"-rsmtp";
1899 /* If the program is called as "runq" treat it as equivalent to "exim -q";
1900 this is a smail convention. */
1902 if ((namelen == 4 && Ustrcmp(argv[0], "runq") == 0) ||
1903 (namelen > 4 && Ustrncmp(argv[0] + namelen - 5, "/runq", 5) == 0))
1906 receiving_message = FALSE;
1907 called_as = US"-runq";
1910 /* If the program is called as "newaliases" treat it as equivalent to
1911 "exim -bi"; this is a sendmail convention. */
1913 if ((namelen == 10 && Ustrcmp(argv[0], "newaliases") == 0) ||
1914 (namelen > 10 && Ustrncmp(argv[0] + namelen - 11, "/newaliases", 11) == 0))
1917 receiving_message = FALSE;
1918 called_as = US"-newaliases";
1921 /* Save the original effective uid for a couple of uses later. It should
1922 normally be root, but in some esoteric environments it may not be. */
1924 original_euid = geteuid();
1925 original_egid = getegid();
1927 /* Get the real uid and gid. If the caller is root, force the effective uid/gid
1928 to be the same as the real ones. This makes a difference only if Exim is setuid
1929 (or setgid) to something other than root, which could be the case in some
1930 special configurations. */
1932 real_uid = getuid();
1933 real_gid = getgid();
1935 if (real_uid == root_uid)
1937 if ((rv = setgid(real_gid)))
1938 exim_fail("exim: setgid(%ld) failed: %s\n",
1939 (long int)real_gid, strerror(errno));
1940 if ((rv = setuid(real_uid)))
1941 exim_fail("exim: setuid(%ld) failed: %s\n",
1942 (long int)real_uid, strerror(errno));
1945 /* If neither the original real uid nor the original euid was root, Exim is
1946 running in an unprivileged state. */
1948 unprivileged = (real_uid != root_uid && original_euid != root_uid);
1950 /* Scan the program's arguments. Some can be dealt with right away; others are
1951 simply recorded for checking and handling afterwards. Do a high-level switch
1952 on the second character (the one after '-'), to save some effort. */
1954 for (i = 1; i < argc; i++)
1956 BOOL badarg = FALSE;
1957 uschar *arg = argv[i];
1961 /* An argument not starting with '-' is the start of a recipients list;
1962 break out of the options-scanning loop. */
1970 /* An option consisting of -- terminates the options */
1972 if (Ustrcmp(arg, "--") == 0)
1974 recipients_arg = i + 1;
1978 /* Handle flagged options */
1980 switchchar = arg[1];
1983 /* Make all -ex options synonymous with -oex arguments, since that
1984 is assumed by various callers. Also make -qR options synonymous with -R
1985 options, as that seems to be required as well. Allow for -qqR too, and
1986 the same for -S options. */
1988 if (Ustrncmp(arg+1, "oe", 2) == 0 ||
1989 Ustrncmp(arg+1, "qR", 2) == 0 ||
1990 Ustrncmp(arg+1, "qS", 2) == 0)
1992 switchchar = arg[2];
1995 else if (Ustrncmp(arg+1, "qqR", 3) == 0 || Ustrncmp(arg+1, "qqS", 3) == 0)
1997 switchchar = arg[3];
1999 f.queue_2stage = TRUE;
2002 /* Make -r synonymous with -f, since it is a documented alias */
2004 else if (arg[1] == 'r') switchchar = 'f';
2006 /* Make -ov synonymous with -v */
2008 else if (Ustrcmp(arg, "-ov") == 0)
2014 /* deal with --option_aliases */
2015 else if (switchchar == '-')
2017 if (Ustrcmp(argrest, "help") == 0)
2019 usage_wanted = TRUE;
2022 else if (Ustrcmp(argrest, "version") == 0)
2029 /* High-level switch on active initial letter */
2034 /* sendmail uses -Ac and -Am to control which .cf file is used;
2037 if (*argrest == '\0') { badarg = TRUE; break; }
2040 BOOL ignore = FALSE;
2045 if (*(argrest + 1) == '\0')
2049 if (!ignore) badarg = TRUE;
2053 /* -Btype is a sendmail option for 7bit/8bit setting. Exim is 8-bit clean
2054 so has no need of it. */
2057 if (!*argrest) i++; /* Skip over the type */
2063 receiving_message = FALSE; /* Reset TRUE for -bm, -bS, -bs below */
2067 /* -bd: Run in daemon mode, awaiting SMTP connections.
2068 -bdf: Ditto, but in the foreground.
2071 f.daemon_listen = TRUE;
2072 if (*argrest == 'f') f.background_daemon = FALSE;
2073 else if (*argrest) badarg = TRUE;
2076 /* -be: Run in expansion test mode
2077 -bem: Ditto, but read a message from a file first
2080 expansion_test = checking = TRUE;
2081 if (*argrest == 'm')
2083 if (++i >= argc) { badarg = TRUE; break; }
2084 expansion_test_message = argv[i];
2087 if (*argrest) badarg = TRUE;
2090 /* -bF: Run system filter test */
2092 filter_test |= checking = FTEST_SYSTEM;
2093 if (*argrest) { badarg = TRUE; break; }
2094 if (++i < argc) filter_test_sfile = argv[i]; else
2095 exim_fail("exim: file name expected after %s\n", argv[i-1]);
2098 /* -bf: Run user filter test
2099 -bfd: Set domain for filter testing
2100 -bfl: Set local part for filter testing
2101 -bfp: Set prefix for filter testing
2102 -bfs: Set suffix for filter testing
2107 filter_test |= checking = FTEST_USER;
2108 if (++i < argc) filter_test_ufile = argv[i];
2109 else exim_fail("exim: file name expected after %s\n", argv[i-1]);
2114 exim_fail("exim: string expected after %s\n", arg);
2115 if (Ustrcmp(argrest, "d") == 0) ftest_domain = argv[i];
2116 else if (Ustrcmp(argrest, "l") == 0) ftest_localpart = argv[i];
2117 else if (Ustrcmp(argrest, "p") == 0) ftest_prefix = argv[i];
2118 else if (Ustrcmp(argrest, "s") == 0) ftest_suffix = argv[i];
2123 /* -bh: Host checking - an IP address must follow. */
2125 if (!*argrest || Ustrcmp(argrest, "c") == 0)
2127 if (++i >= argc) { badarg = TRUE; break; }
2128 sender_host_address = argv[i];
2129 host_checking = checking = f.log_testing_mode = TRUE;
2130 f.host_checking_callout = *argrest == 'c';
2131 message_logs = FALSE;
2136 /* -bi: This option is used by sendmail to initialize *the* alias file,
2137 though it has the -oA option to specify a different file. Exim has no
2138 concept of *the* alias file, but since Sun's YP make script calls
2139 sendmail this way, some support must be provided. */
2141 if (!*++argrest) bi_option = TRUE;
2145 /* -bI: provide information, of the type to follow after a colon.
2146 This is an Exim flag. */
2148 if (Ustrlen(argrest) >= 1 && *argrest == ':')
2150 uschar *p = argrest+1;
2151 info_flag = CMDINFO_HELP;
2153 if (strcmpic(p, CUS"sieve") == 0)
2155 info_flag = CMDINFO_SIEVE;
2158 else if (strcmpic(p, CUS"dscp") == 0)
2160 info_flag = CMDINFO_DSCP;
2163 else if (strcmpic(p, CUS"help") == 0)
2169 /* -bm: Accept and deliver message - the default option. Reinstate
2170 receiving_message, which got turned off for all -b options.
2171 -bmalware: test the filename given for malware */
2173 if (!*argrest) receiving_message = TRUE;
2174 else if (Ustrcmp(argrest, "alware") == 0)
2176 if (++i >= argc) { badarg = TRUE; break; }
2178 malware_test_file = argv[i];
2183 /* -bnq: For locally originating messages, do not qualify unqualified
2184 addresses. In the envelope, this causes errors; in header lines they
2187 if (Ustrcmp(argrest, "q") == 0)
2189 f.allow_unqualified_sender = FALSE;
2190 f.allow_unqualified_recipient = FALSE;
2195 /* -bpxx: List the contents of the mail queue, in various forms. If
2196 the option is -bpc, just a queue count is needed. Otherwise, if the
2197 first letter after p is r, then order is random. */
2199 if (*argrest == 'c')
2202 if (*++argrest) badarg = TRUE;
2206 if (*argrest == 'r')
2208 list_queue_option = 8;
2211 else list_queue_option = 0;
2215 /* -bp: List the contents of the mail queue, top-level only */
2219 /* -bpu: List the contents of the mail queue, top-level undelivered */
2221 else if (Ustrcmp(argrest, "u") == 0) list_queue_option += 1;
2223 /* -bpa: List the contents of the mail queue, including all delivered */
2225 else if (Ustrcmp(argrest, "a") == 0) list_queue_option += 2;
2227 /* Unknown after -bp[r] */
2233 /* -bP: List the configuration variables given as the address list.
2234 Force -v, so configuration errors get displayed. */
2237 /* -bP config: we need to setup here, because later,
2238 * when list_options is checked, the config is read already */
2241 else if (argv[i+1] && Ustrcmp(argv[i+1], "config") == 0)
2244 readconf_save_config(version_string);
2248 list_options = TRUE;
2249 debug_selector |= D_v;
2250 debug_file = stderr;
2254 /* -brt: Test retry configuration lookup */
2256 if (Ustrcmp(argrest, "t") == 0)
2259 test_retry_arg = i + 1;
2263 /* -brw: Test rewrite configuration */
2265 else if (Ustrcmp(argrest, "w") == 0)
2268 test_rewrite_arg = i + 1;
2274 /* -bS: Read SMTP commands on standard input, but produce no replies -
2275 all errors are reported by sending messages. */
2278 smtp_input = smtp_batched_input = receiving_message = TRUE;
2282 /* -bs: Read SMTP commands on standard input and produce SMTP replies
2283 on standard output. */
2285 if (!*argrest) smtp_input = receiving_message = TRUE;
2289 /* -bt: address testing mode */
2292 f.address_test_mode = checking = f.log_testing_mode = TRUE;
2296 /* -bv: verify addresses */
2299 verify_address_mode = checking = f.log_testing_mode = TRUE;
2301 /* -bvs: verify sender addresses */
2303 else if (Ustrcmp(argrest, "s") == 0)
2305 verify_address_mode = checking = f.log_testing_mode = TRUE;
2306 verify_as_sender = TRUE;
2311 /* -bV: Print version string and support details */
2315 printf("Exim version %s #%s built %s\n", version_string,
2316 version_cnumber, version_date);
2317 printf("%s\n", CS version_copyright);
2318 version_printed = TRUE;
2319 show_whats_supported(stdout);
2320 f.log_testing_mode = TRUE;
2325 /* -bw: inetd wait mode, accept a listening socket as stdin */
2327 f.inetd_wait_mode = TRUE;
2328 f.background_daemon = FALSE;
2329 f.daemon_listen = TRUE;
2331 if ((inetd_wait_timeout = readconf_readtime(argrest, 0, FALSE)) <= 0)
2332 exim_fail("exim: bad time value %s: abandoned\n", argv[i]);
2343 /* -C: change configuration file list; ignore if it isn't really
2344 a change! Enforce a prefix check if required. */
2349 if(++i < argc) argrest = argv[i]; else
2350 { badarg = TRUE; break; }
2352 if (Ustrcmp(config_main_filelist, argrest) != 0)
2354 #ifdef ALT_CONFIG_PREFIX
2356 int len = Ustrlen(ALT_CONFIG_PREFIX);
2357 const uschar *list = argrest;
2359 while((filename = string_nextinlist(&list, &sep, big_buffer,
2360 big_buffer_size)) != NULL)
2362 if ((Ustrlen(filename) < len ||
2363 Ustrncmp(filename, ALT_CONFIG_PREFIX, len) != 0 ||
2364 Ustrstr(filename, "/../") != NULL) &&
2365 (Ustrcmp(filename, "/dev/null") != 0 || real_uid != root_uid))
2366 exim_fail("-C Permission denied\n");
2369 if (real_uid != root_uid)
2371 #ifdef TRUSTED_CONFIG_LIST
2373 if (real_uid != exim_uid
2374 #ifdef CONFIGURE_OWNER
2375 && real_uid != config_uid
2378 f.trusted_config = FALSE;
2381 FILE *trust_list = Ufopen(TRUSTED_CONFIG_LIST, "rb");
2384 struct stat statbuf;
2386 if (fstat(fileno(trust_list), &statbuf) != 0 ||
2387 (statbuf.st_uid != root_uid /* owner not root */
2388 #ifdef CONFIGURE_OWNER
2389 && statbuf.st_uid != config_uid /* owner not the special one */
2392 (statbuf.st_gid != root_gid /* group not root */
2393 #ifdef CONFIGURE_GROUP
2394 && statbuf.st_gid != config_gid /* group not the special one */
2396 && (statbuf.st_mode & 020) != 0 /* group writeable */
2398 (statbuf.st_mode & 2) != 0) /* world writeable */
2400 f.trusted_config = FALSE;
2405 /* Well, the trust list at least is up to scratch... */
2406 rmark reset_point = store_mark();
2407 uschar *trusted_configs[32];
2411 while (Ufgets(big_buffer, big_buffer_size, trust_list))
2413 uschar *start = big_buffer, *nl;
2414 while (*start && isspace(*start))
2418 nl = Ustrchr(start, '\n');
2421 trusted_configs[nr_configs++] = string_copy(start);
2422 if (nr_configs == 32)
2430 const uschar *list = argrest;
2432 while (f.trusted_config && (filename = string_nextinlist(&list,
2433 &sep, big_buffer, big_buffer_size)) != NULL)
2435 for (i=0; i < nr_configs; i++)
2436 if (Ustrcmp(filename, trusted_configs[i]) == 0)
2438 if (i == nr_configs)
2440 f.trusted_config = FALSE;
2445 else /* No valid prefixes found in trust_list file. */
2446 f.trusted_config = FALSE;
2447 store_reset(reset_point);
2450 else /* Could not open trust_list file. */
2451 f.trusted_config = FALSE;
2454 /* Not root; don't trust config */
2455 f.trusted_config = FALSE;
2459 config_main_filelist = argrest;
2460 f.config_changed = TRUE;
2465 /* -D: set up a macro definition */
2468 #ifdef DISABLE_D_OPTION
2469 exim_fail("exim: -D is not available in this Exim binary\n");
2475 uschar *s = argrest;
2478 while (isspace(*s)) s++;
2480 if (*s < 'A' || *s > 'Z')
2481 exim_fail("exim: macro name set by -D must start with "
2482 "an upper case letter\n");
2484 while (isalnum(*s) || *s == '_')
2486 if (ptr < sizeof(name)-1) name[ptr++] = *s;
2490 if (ptr == 0) { badarg = TRUE; break; }
2491 while (isspace(*s)) s++;
2494 if (*s++ != '=') { badarg = TRUE; break; }
2495 while (isspace(*s)) s++;
2498 for (m = macros_user; m; m = m->next)
2499 if (Ustrcmp(m->name, name) == 0)
2500 exim_fail("exim: duplicated -D in command line\n");
2502 m = macro_create(name, s, TRUE);
2504 if (clmacro_count >= MAX_CLMACROS)
2505 exim_fail("exim: too many -D options on command line\n");
2506 clmacros[clmacro_count++] =
2507 string_sprintf("-D%s=%s", m->name, m->replacement);
2512 /* -d: Set debug level (see also -v below) or set the drop_cr option.
2513 The latter is now a no-op, retained for compatibility only. If -dd is used,
2514 debugging subprocesses of the daemon is disabled. */
2517 if (Ustrcmp(argrest, "ropcr") == 0)
2519 /* drop_cr = TRUE; */
2522 /* Use an intermediate variable so that we don't set debugging while
2523 decoding the debugging bits. */
2527 unsigned int selector = D_default;
2530 if (*argrest == 'd')
2532 f.debug_daemon = TRUE;
2536 decode_bits(&selector, 1, debug_notall, argrest,
2537 debug_options, debug_options_count, US"debug", 0);
2538 debug_selector = selector;
2543 /* -E: This is a local error message. This option is not intended for
2544 external use at all, but is not restricted to trusted callers because it
2545 does no harm (just suppresses certain error messages) and if Exim is run
2546 not setuid root it won't always be trusted when it generates error
2547 messages using this option. If there is a message id following -E, point
2548 message_reference at it, for logging. */
2551 f.local_error_message = TRUE;
2552 if (mac_ismsgid(argrest)) message_reference = argrest;
2556 /* -ex: The vacation program calls sendmail with the undocumented "-eq"
2557 option, so it looks as if historically the -oex options are also callable
2558 without the leading -o. So we have to accept them. Before the switch,
2559 anything starting -oe has been converted to -e. Exim does not support all
2560 of the sendmail error options. */
2563 if (Ustrcmp(argrest, "e") == 0)
2565 arg_error_handling = ERRORS_SENDER;
2566 errors_sender_rc = EXIT_SUCCESS;
2568 else if (Ustrcmp(argrest, "m") == 0) arg_error_handling = ERRORS_SENDER;
2569 else if (Ustrcmp(argrest, "p") == 0) arg_error_handling = ERRORS_STDERR;
2570 else if (Ustrcmp(argrest, "q") == 0) arg_error_handling = ERRORS_STDERR;
2571 else if (Ustrcmp(argrest, "w") == 0) arg_error_handling = ERRORS_SENDER;
2576 /* -F: Set sender's full name, used instead of the gecos entry from
2577 the password file. Since users can usually alter their gecos entries,
2578 there's no security involved in using this instead. The data can follow
2579 the -F or be in the next argument. */
2584 if(++i < argc) argrest = argv[i]; else
2585 { badarg = TRUE; break; }
2587 originator_name = argrest;
2588 f.sender_name_forced = TRUE;
2592 /* -f: Set sender's address - this value is only actually used if Exim is
2593 run by a trusted user, or if untrusted_set_sender is set and matches the
2594 address, except that the null address can always be set by any user. The
2595 test for this happens later, when the value given here is ignored when not
2596 permitted. For an untrusted user, the actual sender is still put in Sender:
2597 if it doesn't match the From: header (unless no_local_from_check is set).
2598 The data can follow the -f or be in the next argument. The -r switch is an
2599 obsolete form of -f but since there appear to be programs out there that
2600 use anything that sendmail has ever supported, better accept it - the
2601 synonymizing is done before the switch above.
2603 At this stage, we must allow domain literal addresses, because we don't
2604 know what the setting of allow_domain_literals is yet. Ditto for trailing
2605 dots and strip_trailing_dot. */
2609 int dummy_start, dummy_end;
2613 if (i+1 < argc) argrest = argv[++i]; else
2614 { badarg = TRUE; break; }
2617 *(sender_address = store_get(1, FALSE)) = '\0'; /* Ensure writeable memory */
2620 uschar *temp = argrest + Ustrlen(argrest) - 1;
2621 while (temp >= argrest && isspace(*temp)) temp--;
2622 if (temp >= argrest && *temp == '.') f_end_dot = TRUE;
2623 allow_domain_literals = TRUE;
2624 strip_trailing_dot = TRUE;
2626 allow_utf8_domains = TRUE;
2628 sender_address = parse_extract_address(argrest, &errmess,
2629 &dummy_start, &dummy_end, &sender_address_domain, TRUE);
2630 sender_address = string_copy_taint(sender_address, TRUE);
2632 message_smtputf8 = string_is_utf8(sender_address);
2633 allow_utf8_domains = FALSE;
2635 allow_domain_literals = FALSE;
2636 strip_trailing_dot = FALSE;
2637 if (!sender_address)
2638 exim_fail("exim: bad -f address \"%s\": %s\n", argrest, errmess);
2640 f.sender_address_forced = TRUE;
2644 /* -G: sendmail invocation to specify that it's a gateway submission and
2645 sendmail may complain about problems instead of fixing them.
2646 We make it equivalent to an ACL "control = suppress_local_fixups" and do
2647 not at this time complain about problems. */
2653 /* -h: Set the hop count for an incoming message. Exim does not currently
2654 support this; it always computes it by counting the Received: headers.
2655 To put it in will require a change to the spool header file format. */
2660 if(++i < argc) argrest = argv[i]; else
2661 { badarg = TRUE; break; }
2663 if (!isdigit(*argrest)) badarg = TRUE;
2667 /* -i: Set flag so dot doesn't end non-SMTP input (same as -oi, seems
2668 not to be documented for sendmail but mailx (at least) uses it) */
2671 if (*argrest == 0) f.dot_ends = FALSE; else badarg = TRUE;
2675 /* -L: set the identifier used for syslog; equivalent to setting
2676 syslog_processname in the config file, but needs to be an admin option. */
2679 if (*argrest == '\0')
2681 if(++i < argc) argrest = argv[i]; else
2682 { badarg = TRUE; break; }
2684 if ((sz = Ustrlen(argrest)) > 32)
2685 exim_fail("exim: the -L syslog name is too long: \"%s\"\n", argrest);
2687 exim_fail("exim: the -L syslog name is too short\n");
2688 cmdline_syslog_name = argrest;
2692 receiving_message = FALSE;
2694 /* -MC: continue delivery of another message via an existing open
2695 file descriptor. This option is used for an internal call by the
2696 smtp transport when there is a pending message waiting to go to an
2697 address to which it has got a connection. Five subsequent arguments are
2698 required: transport name, host name, IP address, sequence number, and
2699 message_id. Transports may decline to create new processes if the sequence
2700 number gets too big. The channel is stdin. This (-MC) must be the last
2701 argument. There's a subsequent check that the real-uid is privileged.
2703 If we are running in the test harness. delay for a bit, to let the process
2704 that set this one up complete. This makes for repeatability of the logging,
2707 if (Ustrcmp(argrest, "C") == 0)
2709 union sockaddr_46 interface_sock;
2710 EXIM_SOCKLEN_T size = sizeof(interface_sock);
2713 exim_fail("exim: too many or too few arguments after -MC\n");
2715 if (msg_action_arg >= 0)
2716 exim_fail("exim: incompatible arguments\n");
2718 continue_transport = argv[++i];
2719 continue_hostname = argv[++i];
2720 continue_host_address = argv[++i];
2721 continue_sequence = Uatoi(argv[++i]);
2722 msg_action = MSG_DELIVER;
2723 msg_action_arg = ++i;
2724 forced_delivery = TRUE;
2725 queue_run_pid = passed_qr_pid;
2726 queue_run_pipe = passed_qr_pipe;
2728 if (!mac_ismsgid(argv[i]))
2729 exim_fail("exim: malformed message id %s after -MC option\n",
2732 /* Set up $sending_ip_address and $sending_port, unless proxied */
2734 if (!continue_proxy_cipher)
2735 if (getsockname(fileno(stdin), (struct sockaddr *)(&interface_sock),
2737 sending_ip_address = host_ntoa(-1, &interface_sock, NULL,
2740 exim_fail("exim: getsockname() failed after -MC option: %s\n",
2743 testharness_pause_ms(500);
2747 else if (*argrest == 'C' && argrest[1] && !argrest[2])
2751 /* -MCA: set the smtp_authenticated flag; this is useful only when it
2752 precedes -MC (see above). The flag indicates that the host to which
2753 Exim is connected has accepted an AUTH sequence. */
2755 case 'A': f.smtp_authenticated = TRUE; break;
2757 /* -MCD: set the smtp_use_dsn flag; this indicates that the host
2758 that exim is connected to supports the esmtp extension DSN */
2760 case 'D': smtp_peer_options |= OPTION_DSN; break;
2762 /* -MCG: set the queue name, to a non-default value */
2764 case 'G': if (++i < argc) queue_name = string_copy(argv[i]);
2768 /* -MCK: the peer offered CHUNKING. Must precede -MC */
2770 case 'K': smtp_peer_options |= OPTION_CHUNKING; break;
2772 /* -MCP: set the smtp_use_pipelining flag; this is useful only when
2773 it preceded -MC (see above) */
2775 case 'P': smtp_peer_options |= OPTION_PIPE; break;
2777 /* -MCQ: pass on the pid of the queue-running process that started
2778 this chain of deliveries and the fd of its synchronizing pipe; this
2779 is useful only when it precedes -MC (see above) */
2781 case 'Q': if (++i < argc) passed_qr_pid = (pid_t)(Uatol(argv[i]));
2783 if (++i < argc) passed_qr_pipe = (int)(Uatol(argv[i]));
2787 /* -MCS: set the smtp_use_size flag; this is useful only when it
2788 precedes -MC (see above) */
2790 case 'S': smtp_peer_options |= OPTION_SIZE; break;
2793 /* -MCt: similar to -MCT below but the connection is still open
2794 via a proxy process which handles the TLS context and coding.
2795 Require three arguments for the proxied local address and port,
2796 and the TLS cipher. */
2798 case 't': if (++i < argc) sending_ip_address = argv[i];
2800 if (++i < argc) sending_port = (int)(Uatol(argv[i]));
2802 if (++i < argc) continue_proxy_cipher = argv[i];
2806 /* -MCT: set the tls_offered flag; this is useful only when it
2807 precedes -MC (see above). The flag indicates that the host to which
2808 Exim is connected has offered TLS support. */
2810 case 'T': smtp_peer_options |= OPTION_TLS; break;
2813 default: badarg = TRUE; break;
2818 /* -M[x]: various operations on the following list of message ids:
2819 -M deliver the messages, ignoring next retry times and thawing
2820 -Mc deliver the messages, checking next retry times, no thawing
2821 -Mf freeze the messages
2822 -Mg give up on the messages
2823 -Mt thaw the messages
2824 -Mrm remove the messages
2825 In the above cases, this must be the last option. There are also the
2826 following options which are followed by a single message id, and which
2827 act on that message. Some of them use the "recipient" addresses as well.
2828 -Mar add recipient(s)
2829 -Mmad mark all recipients delivered
2830 -Mmd mark recipients(s) delivered
2832 -Mset load a message for use with -be
2834 -Mvc show copy (of whole message, in RFC 2822 format)
2839 else if (*argrest == 0)
2841 msg_action = MSG_DELIVER;
2842 forced_delivery = f.deliver_force_thaw = TRUE;
2844 else if (Ustrcmp(argrest, "ar") == 0)
2846 msg_action = MSG_ADD_RECIPIENT;
2847 one_msg_action = TRUE;
2849 else if (Ustrcmp(argrest, "c") == 0) msg_action = MSG_DELIVER;
2850 else if (Ustrcmp(argrest, "es") == 0)
2852 msg_action = MSG_EDIT_SENDER;
2853 one_msg_action = TRUE;
2855 else if (Ustrcmp(argrest, "f") == 0) msg_action = MSG_FREEZE;
2856 else if (Ustrcmp(argrest, "g") == 0)
2858 msg_action = MSG_DELIVER;
2859 deliver_give_up = TRUE;
2861 else if (Ustrcmp(argrest, "G") == 0)
2863 msg_action = MSG_SETQUEUE;
2864 queue_name_dest = argv[++i];
2866 else if (Ustrcmp(argrest, "mad") == 0)
2868 msg_action = MSG_MARK_ALL_DELIVERED;
2870 else if (Ustrcmp(argrest, "md") == 0)
2872 msg_action = MSG_MARK_DELIVERED;
2873 one_msg_action = TRUE;
2875 else if (Ustrcmp(argrest, "rm") == 0) msg_action = MSG_REMOVE;
2876 else if (Ustrcmp(argrest, "set") == 0)
2878 msg_action = MSG_LOAD;
2879 one_msg_action = TRUE;
2881 else if (Ustrcmp(argrest, "t") == 0) msg_action = MSG_THAW;
2882 else if (Ustrcmp(argrest, "vb") == 0)
2884 msg_action = MSG_SHOW_BODY;
2885 one_msg_action = TRUE;
2887 else if (Ustrcmp(argrest, "vc") == 0)
2889 msg_action = MSG_SHOW_COPY;
2890 one_msg_action = TRUE;
2892 else if (Ustrcmp(argrest, "vh") == 0)
2894 msg_action = MSG_SHOW_HEADER;
2895 one_msg_action = TRUE;
2897 else if (Ustrcmp(argrest, "vl") == 0)
2899 msg_action = MSG_SHOW_LOG;
2900 one_msg_action = TRUE;
2902 else { badarg = TRUE; break; }
2904 /* All the -Mxx options require at least one message id. */
2906 msg_action_arg = i + 1;
2907 if (msg_action_arg >= argc)
2908 exim_fail("exim: no message ids given after %s option\n", arg);
2910 /* Some require only message ids to follow */
2912 if (!one_msg_action)
2914 for (int j = msg_action_arg; j < argc; j++) if (!mac_ismsgid(argv[j]))
2915 exim_fail("exim: malformed message id %s after %s option\n",
2917 goto END_ARG; /* Remaining args are ids */
2920 /* Others require only one message id, possibly followed by addresses,
2921 which will be handled as normal arguments. */
2925 if (!mac_ismsgid(argv[msg_action_arg]))
2926 exim_fail("exim: malformed message id %s after %s option\n",
2927 argv[msg_action_arg], arg);
2933 /* Some programs seem to call the -om option without the leading o;
2934 for sendmail it askes for "me too". Exim always does this. */
2937 if (*argrest != 0) badarg = TRUE;
2941 /* -N: don't do delivery - a debugging option that stops transports doing
2942 their thing. It implies debugging at the D_v level. */
2947 f.dont_deliver = TRUE;
2948 debug_selector |= D_v;
2949 debug_file = stderr;
2955 /* -n: This means "don't alias" in sendmail, apparently.
2956 For normal invocations, it has no effect.
2957 It may affect some other options. */
2963 /* -O: Just ignore it. In sendmail, apparently -O option=value means set
2964 option to the specified value. This form uses long names. We need to handle
2965 -O option=value and -Ooption=value. */
2970 exim_fail("exim: string expected after -O\n");
2976 /* -oA: Set an argument for the bi command (sendmail's "alternate alias
2979 if (!*(alias_arg = argrest))
2980 if (i+1 < argc) alias_arg = argv[++i];
2981 else exim_fail("exim: string expected after -oA\n");
2984 /* -oB: Set a connection message max value for remote deliveries */
2987 uschar * p = argrest;
2989 if (i+1 < argc && isdigit((argv[i+1][0])))
2993 connection_max_messages = 1;
3000 exim_fail("exim: number expected after -oB\n");
3001 connection_max_messages = Uatoi(p);
3006 /* -odb: background delivery */
3009 if (Ustrcmp(argrest, "b") == 0)
3011 f.synchronous_delivery = FALSE;
3012 arg_queue_only = FALSE;
3013 queue_only_set = TRUE;
3016 /* -odd: testsuite-only: add no inter-process delays */
3018 else if (Ustrcmp(argrest, "d") == 0)
3019 f.testsuite_delays = FALSE;
3021 /* -odf: foreground delivery (smail-compatible option); same effect as
3022 -odi: interactive (synchronous) delivery (sendmail-compatible option)
3025 else if (Ustrcmp(argrest, "f") == 0 || Ustrcmp(argrest, "i") == 0)
3027 f.synchronous_delivery = TRUE;
3028 arg_queue_only = FALSE;
3029 queue_only_set = TRUE;
3032 /* -odq: queue only */
3034 else if (Ustrcmp(argrest, "q") == 0)
3036 f.synchronous_delivery = FALSE;
3037 arg_queue_only = TRUE;
3038 queue_only_set = TRUE;
3041 /* -odqs: queue SMTP only - do local deliveries and remote routing,
3042 but no remote delivery */
3044 else if (Ustrcmp(argrest, "qs") == 0)
3046 f.queue_smtp = TRUE;
3047 arg_queue_only = FALSE;
3048 queue_only_set = TRUE;
3053 /* -oex: Sendmail error flags. As these are also accepted without the
3054 leading -o prefix, for compatibility with vacation and other callers,
3055 they are handled with -e above. */
3057 /* -oi: Set flag so dot doesn't end non-SMTP input (same as -i)
3058 -oitrue: Another sendmail syntax for the same */
3061 if (!*argrest || Ustrcmp(argrest, "true") == 0)
3066 /* -oM*: Set various characteristics for an incoming message; actually
3067 acted on for trusted callers only. */
3072 exim_fail("exim: data expected after -oM%s\n", argrest);
3074 /* -oMa: Set sender host address */
3076 if (Ustrcmp(argrest, "a") == 0) sender_host_address = argv[++i];
3078 /* -oMaa: Set authenticator name */
3080 else if (Ustrcmp(argrest, "aa") == 0)
3081 sender_host_authenticated = argv[++i];
3083 /* -oMas: setting authenticated sender */
3085 else if (Ustrcmp(argrest, "as") == 0)
3086 authenticated_sender = string_copy_taint(argv[++i], TRUE);
3088 /* -oMai: setting authenticated id */
3090 else if (Ustrcmp(argrest, "ai") == 0)
3091 authenticated_id = string_copy_taint(argv[++i], TRUE);
3093 /* -oMi: Set incoming interface address */
3095 else if (Ustrcmp(argrest, "i") == 0) interface_address = argv[++i];
3097 /* -oMm: Message reference */
3099 else if (Ustrcmp(argrest, "m") == 0)
3101 if (!mac_ismsgid(argv[i+1]))
3102 exim_fail("-oMm must be a valid message ID\n");
3103 if (!f.trusted_config)
3104 exim_fail("-oMm must be called by a trusted user/config\n");
3105 message_reference = argv[++i];
3108 /* -oMr: Received protocol */
3110 else if (Ustrcmp(argrest, "r") == 0)
3112 if (received_protocol)
3113 exim_fail("received_protocol is set already\n");
3115 received_protocol = argv[++i];
3117 /* -oMs: Set sender host name */
3119 else if (Ustrcmp(argrest, "s") == 0)
3120 sender_host_name = string_copy_taint(argv[++i], TRUE);
3122 /* -oMt: Set sender ident */
3124 else if (Ustrcmp(argrest, "t") == 0)
3126 sender_ident_set = TRUE;
3127 sender_ident = argv[++i];
3130 /* Else a bad argument */
3137 /* -om: Me-too flag for aliases. Exim always does this. Some programs
3138 seem to call this as -m (undocumented), so that is also accepted (see
3140 /* -oo: An ancient flag for old-style addresses which still seems to
3141 crop up in some calls (see in SCO). */
3145 if (*argrest) badarg = TRUE;
3148 /* -oP <name>: set pid file path for daemon
3149 -oPX: delete pid file of daemon */
3152 if (!*argrest) override_pid_file_path = argv[++i];
3153 else if (Ustrcmp(argrest, "X") == 0) delete_pid_file();
3158 /* -or <n>: set timeout for non-SMTP acceptance
3159 -os <n>: set timeout for SMTP acceptance */
3164 int * tp = argrest[-1] == 'r'
3165 ? &arg_receive_timeout : &arg_smtp_receive_timeout;
3167 *tp = readconf_readtime(argrest, 0, FALSE);
3168 else if (i+1 < argc)
3169 *tp = readconf_readtime(argv[++i], 0, FALSE);
3172 exim_fail("exim: bad time value %s: abandoned\n", argv[i]);
3176 /* -oX <list>: Override local_interfaces and/or default daemon ports */
3179 if (*argrest) badarg = TRUE;
3180 else override_local_interfaces = argv[++i];
3183 /* Unknown -o argument */
3191 /* -ps: force Perl startup; -pd force delayed Perl startup */
3195 if (*argrest == 's' && argrest[1] == 0)
3197 perl_start_option = 1;
3200 if (*argrest == 'd' && argrest[1] == 0)
3202 perl_start_option = -1;
3207 /* -panythingelse is taken as the Sendmail-compatible argument -prval:sval,
3208 which sets the host protocol and host name */
3212 argrest = argv[++i];
3214 { badarg = TRUE; break; }
3220 if (received_protocol)
3221 exim_fail("received_protocol is set already\n");
3223 hn = Ustrchr(argrest, ':');
3225 received_protocol = argrest;
3228 int old_pool = store_pool;
3229 store_pool = POOL_PERM;
3230 received_protocol = string_copyn(argrest, hn - argrest);
3231 store_pool = old_pool;
3232 sender_host_name = hn + 1;
3239 receiving_message = FALSE;
3240 if (queue_interval >= 0)
3241 exim_fail("exim: -q specified more than once\n");
3243 /* -qq...: Do queue runs in a 2-stage manner */
3245 if (*argrest == 'q')
3247 f.queue_2stage = TRUE;
3251 /* -qi...: Do only first (initial) deliveries */
3253 if (*argrest == 'i')
3255 f.queue_run_first_delivery = TRUE;
3259 /* -qf...: Run the queue, forcing deliveries
3260 -qff..: Ditto, forcing thawing as well */
3262 if (*argrest == 'f')
3264 f.queue_run_force = TRUE;
3265 if (*++argrest == 'f')
3267 f.deliver_force_thaw = TRUE;
3272 /* -q[f][f]l...: Run the queue only on local deliveries */
3274 if (*argrest == 'l')
3276 f.queue_run_local = TRUE;
3280 /* -q[f][f][l][G<name>]... Work on the named queue */
3282 if (*argrest == 'G')
3285 for (argrest++, i = 0; argrest[i] && argrest[i] != '/'; ) i++;
3286 queue_name = string_copyn(argrest, i);
3288 if (*argrest == '/') argrest++;
3291 /* -q[f][f][l][G<name>]: Run the queue, optionally forced, optionally local
3292 only, optionally named, optionally starting from a given message id. */
3294 if (!(list_queue || count_queue))
3296 && (i + 1 >= argc || argv[i+1][0] == '-' || mac_ismsgid(argv[i+1])))
3299 if (i+1 < argc && mac_ismsgid(argv[i+1]))
3300 start_queue_run_id = argv[++i];
3301 if (i+1 < argc && mac_ismsgid(argv[i+1]))
3302 stop_queue_run_id = argv[++i];
3305 /* -q[f][f][l][G<name>/]<n>: Run the queue at regular intervals, optionally
3306 forced, optionally local only, optionally named. */
3308 else if ((queue_interval = readconf_readtime(*argrest ? argrest : argv[++i],
3310 exim_fail("exim: bad time value %s: abandoned\n", argv[i]);
3314 case 'R': /* Synonymous with -qR... */
3315 receiving_message = FALSE;
3317 /* -Rf: As -R (below) but force all deliveries,
3318 -Rff: Ditto, but also thaw all frozen messages,
3319 -Rr: String is regex
3320 -Rrf: Regex and force
3321 -Rrff: Regex and force and thaw
3323 in all cases provided there are no further characters in this
3327 for (int i = 0; i < nelem(rsopts); i++)
3328 if (Ustrcmp(argrest, rsopts[i]) == 0)
3330 if (i != 2) f.queue_run_force = TRUE;
3331 if (i >= 2) f.deliver_selectstring_regex = TRUE;
3332 if (i == 1 || i == 4) f.deliver_force_thaw = TRUE;
3333 argrest += Ustrlen(rsopts[i]);
3336 /* -R: Set string to match in addresses for forced queue run to
3337 pick out particular messages. */
3340 deliver_selectstring = argrest;
3341 else if (i+1 < argc)
3342 deliver_selectstring = argv[++i];
3344 exim_fail("exim: string expected after -R\n");
3348 /* -r: an obsolete synonym for -f (see above) */
3351 /* -S: Like -R but works on sender. */
3353 case 'S': /* Synonymous with -qS... */
3354 receiving_message = FALSE;
3356 /* -Sf: As -S (below) but force all deliveries,
3357 -Sff: Ditto, but also thaw all frozen messages,
3358 -Sr: String is regex
3359 -Srf: Regex and force
3360 -Srff: Regex and force and thaw
3362 in all cases provided there are no further characters in this
3366 for (int i = 0; i < nelem(rsopts); i++)
3367 if (Ustrcmp(argrest, rsopts[i]) == 0)
3369 if (i != 2) f.queue_run_force = TRUE;
3370 if (i >= 2) f.deliver_selectstring_sender_regex = TRUE;
3371 if (i == 1 || i == 4) f.deliver_force_thaw = TRUE;
3372 argrest += Ustrlen(rsopts[i]);
3375 /* -S: Set string to match in addresses for forced queue run to
3376 pick out particular messages. */
3379 deliver_selectstring_sender = argrest;
3380 else if (i+1 < argc)
3381 deliver_selectstring_sender = argv[++i];
3383 exim_fail("exim: string expected after -S\n");
3386 /* -Tqt is an option that is exclusively for use by the testing suite.
3387 It is not recognized in other circumstances. It allows for the setting up
3388 of explicit "queue times" so that various warning/retry things can be
3389 tested. Otherwise variability of clock ticks etc. cause problems. */
3392 if (f.running_in_test_harness && Ustrcmp(argrest, "qt") == 0)
3393 fudged_queue_times = argv[++i];
3398 /* -t: Set flag to extract recipients from body of message. */
3401 if (*argrest == 0) extract_recipients = TRUE;
3403 /* -ti: Set flag to extract recipients from body of message, and also
3404 specify that dot does not end the message. */
3406 else if (Ustrcmp(argrest, "i") == 0)
3408 extract_recipients = TRUE;
3412 /* -tls-on-connect: don't wait for STARTTLS (for old clients) */
3415 else if (Ustrcmp(argrest, "ls-on-connect") == 0) tls_in.on_connect = TRUE;
3422 /* -U: This means "initial user submission" in sendmail, apparently. The
3423 doc claims that in future sendmail may refuse syntactically invalid
3424 messages instead of fixing them. For the moment, we just ignore it. */
3430 /* -v: verify things - this is a very low-level debugging */
3435 debug_selector |= D_v;
3436 debug_file = stderr;
3442 /* -x: AIX uses this to indicate some fancy 8-bit character stuff:
3444 The -x flag tells the sendmail command that mail from a local
3445 mail program has National Language Support (NLS) extended characters
3446 in the body of the mail item. The sendmail command can send mail with
3447 extended NLS characters across networks that normally corrupts these
3450 As Exim is 8-bit clean, it just ignores this flag. */
3453 if (*argrest != 0) badarg = TRUE;
3456 /* -X: in sendmail: takes one parameter, logfile, and sends debugging
3457 logs to that file. We swallow the parameter and otherwise ignore it. */
3460 if (*argrest == '\0')
3462 exim_fail("exim: string expected after -X\n");
3466 if (*argrest == '\0')
3468 log_oneline = argv[i];
3470 exim_fail("exim: file name expected after %s\n", argv[i-1]);
3473 /* All other initial characters are errors */
3478 } /* End of high-level switch statement */
3480 /* Failed to recognize the option, or syntax error */
3483 exim_fail("exim abandoned: unknown, malformed, or incomplete "
3484 "option %s\n", arg);
3488 /* If -R or -S have been specified without -q, assume a single queue run. */
3490 if ( (deliver_selectstring || deliver_selectstring_sender)
3491 && queue_interval < 0)
3496 /* If usage_wanted is set we call the usage function - which never returns */
3497 if (usage_wanted) exim_usage(called_as);
3499 /* Arguments have been processed. Check for incompatibilities. */
3501 (smtp_input || extract_recipients || recipients_arg < argc) &&
3502 (f.daemon_listen || queue_interval >= 0 || bi_option ||
3503 test_retry_arg >= 0 || test_rewrite_arg >= 0 ||
3504 filter_test != FTEST_NONE || (msg_action_arg > 0 && !one_msg_action))
3507 msg_action_arg > 0 &&
3508 (f.daemon_listen || queue_interval > 0 || list_options ||
3509 (checking && msg_action != MSG_LOAD) ||
3510 bi_option || test_retry_arg >= 0 || test_rewrite_arg >= 0)
3513 (f.daemon_listen || queue_interval > 0) &&
3514 (sender_address != NULL || list_options || list_queue || checking ||
3518 f.daemon_listen && queue_interval == 0
3521 f.inetd_wait_mode && queue_interval >= 0
3525 (checking || smtp_input || extract_recipients ||
3526 filter_test != FTEST_NONE || bi_option)
3529 verify_address_mode &&
3530 (f.address_test_mode || smtp_input || extract_recipients ||
3531 filter_test != FTEST_NONE || bi_option)
3534 f.address_test_mode && (smtp_input || extract_recipients ||
3535 filter_test != FTEST_NONE || bi_option)
3538 smtp_input && (sender_address != NULL || filter_test != FTEST_NONE ||
3542 deliver_selectstring != NULL && queue_interval < 0
3545 msg_action == MSG_LOAD &&
3546 (!expansion_test || expansion_test_message != NULL)
3549 exim_fail("exim: incompatible command-line options or arguments\n");
3551 /* If debugging is set up, set the file and the file descriptor to pass on to
3552 child processes. It should, of course, be 2 for stderr. Also, force the daemon
3553 to run in the foreground. */
3555 if (debug_selector != 0)
3557 debug_file = stderr;
3558 debug_fd = fileno(debug_file);
3559 f.background_daemon = FALSE;
3560 testharness_pause_ms(100); /* lets caller finish */
3561 if (debug_selector != D_v) /* -v only doesn't show this */
3563 debug_printf("Exim version %s uid=%ld gid=%ld pid=%d D=%x\n",
3564 version_string, (long int)real_uid, (long int)real_gid, (int)getpid(),
3566 if (!version_printed)
3567 show_whats_supported(stderr);
3571 /* When started with root privilege, ensure that the limits on the number of
3572 open files and the number of processes (where that is accessible) are
3573 sufficiently large, or are unset, in case Exim has been called from an
3574 environment where the limits are screwed down. Not all OS have the ability to
3575 change some of these limits. */
3579 DEBUG(D_any) debug_print_ids(US"Exim has no root privilege:");
3585 #ifdef RLIMIT_NOFILE
3586 if (getrlimit(RLIMIT_NOFILE, &rlp) < 0)
3588 log_write(0, LOG_MAIN|LOG_PANIC, "getrlimit(RLIMIT_NOFILE) failed: %s",
3590 rlp.rlim_cur = rlp.rlim_max = 0;
3593 /* I originally chose 1000 as a nice big number that was unlikely to
3594 be exceeded. It turns out that some older OS have a fixed upper limit of
3597 if (rlp.rlim_cur < 1000)
3599 rlp.rlim_cur = rlp.rlim_max = 1000;
3600 if (setrlimit(RLIMIT_NOFILE, &rlp) < 0)
3602 rlp.rlim_cur = rlp.rlim_max = 256;
3603 if (setrlimit(RLIMIT_NOFILE, &rlp) < 0)
3604 log_write(0, LOG_MAIN|LOG_PANIC, "setrlimit(RLIMIT_NOFILE) failed: %s",
3611 if (getrlimit(RLIMIT_NPROC, &rlp) < 0)
3613 log_write(0, LOG_MAIN|LOG_PANIC, "getrlimit(RLIMIT_NPROC) failed: %s",
3615 rlp.rlim_cur = rlp.rlim_max = 0;
3618 #ifdef RLIM_INFINITY
3619 if (rlp.rlim_cur != RLIM_INFINITY && rlp.rlim_cur < 1000)
3621 rlp.rlim_cur = rlp.rlim_max = RLIM_INFINITY;
3623 if (rlp.rlim_cur < 1000)
3625 rlp.rlim_cur = rlp.rlim_max = 1000;
3627 if (setrlimit(RLIMIT_NPROC, &rlp) < 0)
3628 log_write(0, LOG_MAIN|LOG_PANIC, "setrlimit(RLIMIT_NPROC) failed: %s",
3634 /* Exim is normally entered as root (but some special configurations are
3635 possible that don't do this). However, it always spins off sub-processes that
3636 set their uid and gid as required for local delivery. We don't want to pass on
3637 any extra groups that root may belong to, so we want to get rid of them all at
3640 We need to obey setgroups() at this stage, before possibly giving up root
3641 privilege for a changed configuration file, but later on we might need to
3642 check on the additional groups for the admin user privilege - can't do that
3643 till after reading the config, which might specify the exim gid. Therefore,
3644 save the group list here first. */
3646 if ((group_count = getgroups(nelem(group_list), group_list)) < 0)
3647 exim_fail("exim: getgroups() failed: %s\n", strerror(errno));
3649 /* There is a fundamental difference in some BSD systems in the matter of
3650 groups. FreeBSD and BSDI are known to be different; NetBSD and OpenBSD are
3651 known not to be different. On the "different" systems there is a single group
3652 list, and the first entry in it is the current group. On all other versions of
3653 Unix there is a supplementary group list, which is in *addition* to the current
3654 group. Consequently, to get rid of all extraneous groups on a "standard" system
3655 you pass over 0 groups to setgroups(), while on a "different" system you pass
3656 over a single group - the current group, which is always the first group in the
3657 list. Calling setgroups() with zero groups on a "different" system results in
3658 an error return. The following code should cope with both types of system.
3660 Unfortunately, recent MacOS, which should be a FreeBSD, "helpfully" succeeds
3661 the "setgroups() with zero groups" - and changes the egid.
3662 Thanks to that we had to stash the original_egid above, for use below
3663 in the call to exim_setugid().
3665 However, if this process isn't running as root, setgroups() can't be used
3666 since you have to be root to run it, even if throwing away groups.
3667 Except, sigh, for Hurd - where you can.
3668 Not being root here happens only in some unusual configurations. */
3671 #ifndef OS_SETGROUPS_ZERO_DROPS_ALL
3672 && setgroups(0, NULL) != 0
3674 && setgroups(1, group_list) != 0)
3675 exim_fail("exim: setgroups() failed: %s\n", strerror(errno));
3677 /* If the configuration file name has been altered by an argument on the
3678 command line (either a new file name or a macro definition) and the caller is
3679 not root, or if this is a filter testing run, remove any setuid privilege the
3680 program has and run as the underlying user.
3682 The exim user is locked out of this, which severely restricts the use of -C
3685 Otherwise, set the real ids to the effective values (should be root unless run
3686 from inetd, which it can either be root or the exim uid, if one is configured).
3688 There is a private mechanism for bypassing some of this, in order to make it
3689 possible to test lots of configurations automatically, without having either to
3690 recompile each time, or to patch in an actual configuration file name and other
3691 values (such as the path name). If running in the test harness, pretend that
3692 configuration file changes and macro definitions haven't happened. */
3695 (!f.trusted_config || /* Config changed, or */
3696 !macros_trusted(opt_D_used)) && /* impermissible macros and */
3697 real_uid != root_uid && /* Not root, and */
3698 !f.running_in_test_harness /* Not fudged */
3700 expansion_test /* expansion testing */
3702 filter_test != FTEST_NONE) /* Filter testing */
3704 setgroups(group_count, group_list);
3705 exim_setugid(real_uid, real_gid, FALSE,
3706 US"-C, -D, -be or -bf forces real uid");
3707 removed_privilege = TRUE;
3709 /* In the normal case when Exim is called like this, stderr is available
3710 and should be used for any logging information because attempts to write
3711 to the log will usually fail. To arrange this, we unset really_exim. However,
3712 if no stderr is available there is no point - we might as well have a go
3713 at the log (if it fails, syslog will be written).
3715 Note that if the invoker is Exim, the logs remain available. Messing with
3716 this causes unlogged successful deliveries. */
3718 if (log_stderr && real_uid != exim_uid)
3719 f.really_exim = FALSE;
3722 /* Privilege is to be retained for the moment. It may be dropped later,
3723 depending on the job that this Exim process has been asked to do. For now, set
3724 the real uid to the effective so that subsequent re-execs of Exim are done by a
3728 exim_setugid(geteuid(), original_egid, FALSE, US"forcing real = effective");
3730 /* If testing a filter, open the file(s) now, before wasting time doing other
3731 setups and reading the message. */
3733 if (filter_test & FTEST_SYSTEM)
3734 if ((filter_sfd = Uopen(filter_test_sfile, O_RDONLY, 0)) < 0)
3735 exim_fail("exim: failed to open %s: %s\n", filter_test_sfile,
3738 if (filter_test & FTEST_USER)
3739 if ((filter_ufd = Uopen(filter_test_ufile, O_RDONLY, 0)) < 0)
3740 exim_fail("exim: failed to open %s: %s\n", filter_test_ufile,
3743 /* Initialise lookup_list
3744 If debugging, already called above via version reporting.
3745 In either case, we initialise the list of available lookups while running
3746 as root. All dynamically modules are loaded from a directory which is
3747 hard-coded into the binary and is code which, if not a module, would be
3748 part of Exim already. Ability to modify the content of the directory
3749 is equivalent to the ability to modify a setuid binary!
3751 This needs to happen before we read the main configuration. */
3755 if (f.running_in_test_harness) smtputf8_advertise_hosts = NULL;
3758 /* Read the main runtime configuration data; this gives up if there
3759 is a failure. It leaves the configuration file open so that the subsequent
3760 configuration data for delivery can be read if needed.
3762 NOTE: immediately after opening the configuration file we change the working
3763 directory to "/"! Later we change to $spool_directory. We do it there, because
3764 during readconf_main() some expansion takes place already. */
3766 /* Store the initial cwd before we change directories. Can be NULL if the
3767 dir has already been unlinked. */
3768 initial_cwd = os_getcwd(NULL, 0);
3771 -be[m] expansion test -
3772 -b[fF] filter test new
3774 -bmalware malware_test_file new
3776 -brw rewrite test new
3778 -bv[s] address verify -
3780 -bP <option> (except -bP config, which sets list_config)
3782 If any of these options is set, we suppress warnings about configuration
3783 issues (currently about tls_advertise_hosts and keep_environment not being
3787 #ifdef MEASURE_TIMING
3788 struct timeval t0, diff;
3789 (void)gettimeofday(&t0, NULL);
3792 readconf_main(checking || list_options);
3794 #ifdef MEASURE_TIMING
3795 report_time_since(&t0, US"readconf_main (delta)");
3800 /* Now in directory "/" */
3802 if (cleanup_environment() == FALSE)
3803 log_write(0, LOG_PANIC_DIE, "Can't cleanup environment");
3806 /* If an action on specific messages is requested, or if a daemon or queue
3807 runner is being started, we need to know if Exim was called by an admin user.
3808 This is the case if the real user is root or exim, or if the real group is
3809 exim, or if one of the supplementary groups is exim or a group listed in
3810 admin_groups. We don't fail all message actions immediately if not admin_user,
3811 since some actions can be performed by non-admin users. Instead, set admin_user
3812 for later interrogation. */
3814 if (real_uid == root_uid || real_uid == exim_uid || real_gid == exim_gid)
3815 f.admin_user = TRUE;
3817 for (int i = 0; i < group_count && !f.admin_user; i++)
3818 if (group_list[i] == exim_gid)
3819 f.admin_user = TRUE;
3820 else if (admin_groups)
3821 for (int j = 1; j <= (int)admin_groups[0] && !f.admin_user; j++)
3822 if (admin_groups[j] == group_list[i])
3823 f.admin_user = TRUE;
3825 /* Another group of privileged users are the trusted users. These are root,
3826 exim, and any caller matching trusted_users or trusted_groups. Trusted callers
3827 are permitted to specify sender_addresses with -f on the command line, and
3828 other message parameters as well. */
3830 if (real_uid == root_uid || real_uid == exim_uid)
3831 f.trusted_caller = TRUE;
3835 for (int i = 1; i <= (int)trusted_users[0] && !f.trusted_caller; i++)
3836 if (trusted_users[i] == real_uid)
3837 f.trusted_caller = TRUE;
3840 for (int i = 1; i <= (int)trusted_groups[0] && !f.trusted_caller; i++)
3841 if (trusted_groups[i] == real_gid)
3842 f.trusted_caller = TRUE;
3843 else for (int j = 0; j < group_count && !f.trusted_caller; j++)
3844 if (trusted_groups[i] == group_list[j])
3845 f.trusted_caller = TRUE;
3848 /* At this point, we know if the user is privileged and some command-line
3849 options become possibly impermissible, depending upon the configuration file. */
3851 if (checking && commandline_checks_require_admin && !f.admin_user)
3852 exim_fail("exim: those command-line flags are set to require admin\n");
3854 /* Handle the decoding of logging options. */
3856 decode_bits(log_selector, log_selector_size, log_notall,
3857 log_selector_string, log_options, log_options_count, US"log", 0);
3861 debug_printf("configuration file is %s\n", config_main_filename);
3862 debug_printf("log selectors =");
3863 for (int i = 0; i < log_selector_size; i++)
3864 debug_printf(" %08x", log_selector[i]);
3868 /* If domain literals are not allowed, check the sender address that was
3869 supplied with -f. Ditto for a stripped trailing dot. */
3873 if (sender_address[sender_address_domain] == '[' && !allow_domain_literals)
3874 exim_fail("exim: bad -f address \"%s\": domain literals not "
3875 "allowed\n", sender_address);
3876 if (f_end_dot && !strip_trailing_dot)
3877 exim_fail("exim: bad -f address \"%s.\": domain is malformed "
3878 "(trailing dot not allowed)\n", sender_address);
3881 /* See if an admin user overrode our logging. */
3883 if (cmdline_syslog_name)
3886 syslog_processname = cmdline_syslog_name;
3887 log_file_path = string_copy(CUS"syslog");
3890 /* not a panic, non-privileged users should not be able to spam paniclog */
3892 "exim: you lack sufficient privilege to specify syslog process name\n");
3894 /* Paranoia check of maximum lengths of certain strings. There is a check
3895 on the length of the log file path in log.c, which will come into effect
3896 if there are any calls to write the log earlier than this. However, if we
3897 get this far but the string is very long, it is better to stop now than to
3898 carry on and (e.g.) receive a message and then have to collapse. The call to
3899 log_write() from here will cause the ultimate panic collapse if the complete
3900 file name exceeds the buffer length. */
3902 if (Ustrlen(log_file_path) > 200)
3903 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3904 "log_file_path is longer than 200 chars: aborting");
3906 if (Ustrlen(pid_file_path) > 200)
3907 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3908 "pid_file_path is longer than 200 chars: aborting");
3910 if (Ustrlen(spool_directory) > 200)
3911 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3912 "spool_directory is longer than 200 chars: aborting");
3914 /* Length check on the process name given to syslog for its TAG field,
3915 which is only permitted to be 32 characters or less. See RFC 3164. */
3917 if (Ustrlen(syslog_processname) > 32)
3918 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3919 "syslog_processname is longer than 32 chars: aborting");
3924 log_write(0, LOG_MAIN, "%s", log_oneline);
3925 return EXIT_SUCCESS;
3928 return EXIT_FAILURE;
3930 /* In some operating systems, the environment variable TMPDIR controls where
3931 temporary files are created; Exim doesn't use these (apart from when delivering
3932 to MBX mailboxes), but called libraries such as DBM libraries may require them.
3933 If TMPDIR is found in the environment, reset it to the value defined in the
3934 EXIM_TMPDIR macro, if this macro is defined. For backward compatibility this
3935 macro may be called TMPDIR in old "Local/Makefile"s. It's converted to
3936 EXIM_TMPDIR by the build scripts.
3940 if (environ) for (uschar ** p = USS environ; *p; p++)
3941 if (Ustrncmp(*p, "TMPDIR=", 7) == 0 && Ustrcmp(*p+7, EXIM_TMPDIR) != 0)
3943 uschar * newp = store_malloc(Ustrlen(EXIM_TMPDIR) + 8);
3944 sprintf(CS newp, "TMPDIR=%s", EXIM_TMPDIR);
3946 DEBUG(D_any) debug_printf("reset TMPDIR=%s in environment\n", EXIM_TMPDIR);
3950 /* Timezone handling. If timezone_string is "utc", set a flag to cause all
3951 timestamps to be in UTC (gmtime() is used instead of localtime()). Otherwise,
3952 we may need to get rid of a bogus timezone setting. This can arise when Exim is
3953 called by a user who has set the TZ variable. This then affects the timestamps
3954 in log files and in Received: headers, and any created Date: header lines. The
3955 required timezone is settable in the configuration file, so nothing can be done
3956 about this earlier - but hopefully nothing will normally be logged earlier than
3957 this. We have to make a new environment if TZ is wrong, but don't bother if
3958 timestamps_utc is set, because then all times are in UTC anyway. */
3960 if (timezone_string && strcmpic(timezone_string, US"UTC") == 0)
3961 f.timestamps_utc = TRUE;
3964 uschar *envtz = US getenv("TZ");
3966 ? !timezone_string || Ustrcmp(timezone_string, envtz) != 0
3967 : timezone_string != NULL
3970 uschar **p = USS environ;
3974 if (environ) while (*p++) count++;
3975 if (!envtz) count++;
3976 newp = new = store_malloc(sizeof(uschar *) * (count + 1));
3977 if (environ) for (p = USS environ; *p; p++)
3978 if (Ustrncmp(*p, "TZ=", 3) != 0) *newp++ = *p;
3979 if (timezone_string)
3981 *newp = store_malloc(Ustrlen(timezone_string) + 4);
3982 sprintf(CS *newp++, "TZ=%s", timezone_string);
3987 DEBUG(D_any) debug_printf("Reset TZ to %s: time is %s\n", timezone_string,
3988 tod_stamp(tod_log));
3992 /* Handle the case when we have removed the setuid privilege because of -C or
3993 -D. This means that the caller of Exim was not root.
3995 There is a problem if we were running as the Exim user. The sysadmin may
3996 expect this case to retain privilege because "the binary was called by the
3997 Exim user", but it hasn't, because either the -D option set macros, or the
3998 -C option set a non-trusted configuration file. There are two possibilities:
4000 (1) If deliver_drop_privilege is set, Exim is not going to re-exec in order
4001 to do message deliveries. Thus, the fact that it is running as a
4002 non-privileged user is plausible, and might be wanted in some special
4003 configurations. However, really_exim will have been set false when
4004 privilege was dropped, to stop Exim trying to write to its normal log
4005 files. Therefore, re-enable normal log processing, assuming the sysadmin
4006 has set up the log directory correctly.
4008 (2) If deliver_drop_privilege is not set, the configuration won't work as
4009 apparently intended, and so we log a panic message. In order to retain
4010 root for -C or -D, the caller must either be root or be invoking a
4011 trusted configuration file (when deliver_drop_privilege is false). */
4013 if ( removed_privilege
4014 && (!f.trusted_config || opt_D_used)
4015 && real_uid == exim_uid)
4016 if (deliver_drop_privilege)
4017 f.really_exim = TRUE; /* let logging work normally */
4019 log_write(0, LOG_MAIN|LOG_PANIC,
4020 "exim user lost privilege for using %s option",
4021 f.trusted_config? "-D" : "-C");
4023 /* Start up Perl interpreter if Perl support is configured and there is a
4024 perl_startup option, and the configuration or the command line specifies
4025 initializing starting. Note that the global variables are actually called
4026 opt_perl_xxx to avoid clashing with perl's namespace (perl_*). */
4029 if (perl_start_option != 0)
4030 opt_perl_at_start = (perl_start_option > 0);
4031 if (opt_perl_at_start && opt_perl_startup != NULL)
4034 DEBUG(D_any) debug_printf("Starting Perl interpreter\n");
4035 if ((errstr = init_perl(opt_perl_startup)))
4036 exim_fail("exim: error in perl_startup code: %s\n", errstr);
4037 opt_perl_started = TRUE;
4039 #endif /* EXIM_PERL */
4041 /* Log the arguments of the call if the configuration file said so. This is
4042 a debugging feature for finding out what arguments certain MUAs actually use.
4043 Don't attempt it if logging is disabled, or if listing variables or if
4044 verifying/testing addresses or expansions. */
4046 if ( (debug_selector & D_any || LOGGING(arguments))
4047 && f.really_exim && !list_options && !checking)
4049 uschar *p = big_buffer;
4050 Ustrcpy(p, US"cwd= (failed)");
4056 Ustrncpy(p + 4, initial_cwd, big_buffer_size-5);
4057 p += 4 + Ustrlen(initial_cwd);
4058 /* in case p is near the end and we don't provide enough space for
4059 * string_format to be willing to write. */
4063 (void)string_format(p, big_buffer_size - (p - big_buffer), " %d args:", argc);
4065 for (int i = 0; i < argc; i++)
4067 int len = Ustrlen(argv[i]);
4068 const uschar *printing;
4070 if (p + len + 8 >= big_buffer + big_buffer_size)
4072 Ustrcpy(p, US" ...");
4073 log_write(0, LOG_MAIN, "%s", big_buffer);
4074 Ustrcpy(big_buffer, US"...");
4077 printing = string_printing(argv[i]);
4078 if (printing[0] == 0) quote = US"\""; else
4080 const uschar *pp = printing;
4082 while (*pp != 0) if (isspace(*pp++)) { quote = US"\""; break; }
4084 p += sprintf(CS p, " %s%.*s%s", quote, (int)(big_buffer_size -
4085 (p - big_buffer) - 4), printing, quote);
4088 if (LOGGING(arguments))
4089 log_write(0, LOG_MAIN, "%s", big_buffer);
4091 debug_printf("%s\n", big_buffer);
4094 /* Set the working directory to be the top-level spool directory. We don't rely
4095 on this in the code, which always uses fully qualified names, but it's useful
4096 for core dumps etc. Don't complain if it fails - the spool directory might not
4097 be generally accessible and calls with the -C option (and others) have lost
4098 privilege by now. Before the chdir, we try to ensure that the directory exists.
4101 if (Uchdir(spool_directory) != 0)
4104 (void)directory_make(spool_directory, US"", SPOOL_DIRECTORY_MODE, FALSE);
4105 dummy = /* quieten compiler */ Uchdir(spool_directory);
4106 dummy = dummy; /* yet more compiler quietening, sigh */
4109 /* Handle calls with the -bi option. This is a sendmail option to rebuild *the*
4110 alias file. Exim doesn't have such a concept, but this call is screwed into
4111 Sun's YP makefiles. Handle this by calling a configured script, as the real
4112 user who called Exim. The -oA option can be used to pass an argument to the
4117 (void)fclose(config_file);
4118 if (bi_command != NULL)
4122 argv[i++] = bi_command;
4123 if (alias_arg != NULL) argv[i++] = alias_arg;
4126 setgroups(group_count, group_list);
4127 exim_setugid(real_uid, real_gid, FALSE, US"running bi_command");
4129 DEBUG(D_exec) debug_printf("exec %.256s %.256s\n", argv[0],
4130 (argv[1] == NULL)? US"" : argv[1]);
4132 execv(CS argv[0], (char *const *)argv);
4133 exim_fail("exim: exec failed: %s\n", strerror(errno));
4137 DEBUG(D_any) debug_printf("-bi used but bi_command not set; exiting\n");
4142 /* We moved the admin/trusted check to be immediately after reading the
4143 configuration file. We leave these prints here to ensure that syslog setup,
4144 logfile setup, and so on has already happened. */
4146 if (f.trusted_caller) DEBUG(D_any) debug_printf("trusted user\n");
4147 if (f.admin_user) DEBUG(D_any) debug_printf("admin user\n");
4149 /* Only an admin user may start the daemon or force a queue run in the default
4150 configuration, but the queue run restriction can be relaxed. Only an admin
4151 user may request that a message be returned to its sender forthwith. Only an
4152 admin user may specify a debug level greater than D_v (because it might show
4153 passwords, etc. in lookup queries). Only an admin user may request a queue
4154 count. Only an admin user can use the test interface to scan for email
4155 (because Exim will be in the spool dir and able to look at mails). */
4159 BOOL debugset = (debug_selector & ~D_v) != 0;
4160 if ( deliver_give_up || f.daemon_listen || malware_test_file
4161 || count_queue && queue_list_requires_admin
4162 || list_queue && queue_list_requires_admin
4163 || queue_interval >= 0 && prod_requires_admin
4164 || queue_name_dest && prod_requires_admin
4165 || debugset && !f.running_in_test_harness
4167 exim_fail("exim:%s permission denied\n", debugset? " debugging" : "");
4170 /* If the real user is not root or the exim uid, the argument for passing
4171 in an open TCP/IP connection for another message is not permitted, nor is
4172 running with the -N option for any delivery action, unless this call to exim is
4173 one that supplied an input message, or we are using a patched exim for
4174 regression testing. */
4176 if (real_uid != root_uid && real_uid != exim_uid &&
4177 (continue_hostname != NULL ||
4179 (queue_interval >= 0 || f.daemon_listen || msg_action_arg > 0)
4180 )) && !f.running_in_test_harness)
4181 exim_fail("exim: Permission denied\n");
4183 /* If the caller is not trusted, certain arguments are ignored when running for
4184 real, but are permitted when checking things (-be, -bv, -bt, -bh, -bf, -bF).
4185 Note that authority for performing certain actions on messages is tested in the
4186 queue_action() function. */
4188 if (!f.trusted_caller && !checking)
4190 sender_host_name = sender_host_address = interface_address =
4191 sender_ident = received_protocol = NULL;
4192 sender_host_port = interface_port = 0;
4193 sender_host_authenticated = authenticated_sender = authenticated_id = NULL;
4196 /* If a sender host address is set, extract the optional port number off the
4197 end of it and check its syntax. Do the same thing for the interface address.
4198 Exim exits if the syntax is bad. */
4202 if (sender_host_address != NULL)
4203 sender_host_port = check_port(sender_host_address);
4204 if (interface_address != NULL)
4205 interface_port = check_port(interface_address);
4208 /* If the caller is trusted, then they can use -G to suppress_local_fixups. */
4211 if (f.trusted_caller)
4213 f.suppress_local_fixups = f.suppress_local_fixups_default = TRUE;
4214 DEBUG(D_acl) debug_printf("suppress_local_fixups forced on by -G\n");
4217 exim_fail("exim: permission denied (-G requires a trusted user)\n");
4220 /* If an SMTP message is being received check to see if the standard input is a
4221 TCP/IP socket. If it is, we assume that Exim was called from inetd if the
4222 caller is root or the Exim user, or if the port is a privileged one. Otherwise,
4227 union sockaddr_46 inetd_sock;
4228 EXIM_SOCKLEN_T size = sizeof(inetd_sock);
4229 if (getpeername(0, (struct sockaddr *)(&inetd_sock), &size) == 0)
4231 int family = ((struct sockaddr *)(&inetd_sock))->sa_family;
4232 if (family == AF_INET || family == AF_INET6)
4234 union sockaddr_46 interface_sock;
4235 size = sizeof(interface_sock);
4237 if (getsockname(0, (struct sockaddr *)(&interface_sock), &size) == 0)
4238 interface_address = host_ntoa(-1, &interface_sock, NULL,
4241 if (host_is_tls_on_connect_port(interface_port)) tls_in.on_connect = TRUE;
4243 if (real_uid == root_uid || real_uid == exim_uid || interface_port < 1024)
4246 sender_host_address = host_ntoa(-1, (struct sockaddr *)(&inetd_sock),
4247 NULL, &sender_host_port);
4248 if (mua_wrapper) log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Input from "
4249 "inetd is not supported when mua_wrapper is set");
4253 "exim: Permission denied (unprivileged user, unprivileged port)\n");
4258 /* If the load average is going to be needed while receiving a message, get it
4259 now for those OS that require the first call to os_getloadavg() to be done as
4260 root. There will be further calls later for each message received. */
4262 #ifdef LOAD_AVG_NEEDS_ROOT
4263 if ( receiving_message
4264 && (queue_only_load >= 0 || (f.is_inetd && smtp_load_reserve >= 0)))
4265 load_average = OS_GETLOADAVG();
4268 /* The queue_only configuration option can be overridden by -odx on the command
4269 line, except that if queue_only_override is false, queue_only cannot be unset
4270 from the command line. */
4272 if (queue_only_set && (queue_only_override || arg_queue_only))
4273 queue_only = arg_queue_only;
4275 /* The receive_timeout and smtp_receive_timeout options can be overridden by
4278 if (arg_receive_timeout >= 0) receive_timeout = arg_receive_timeout;
4279 if (arg_smtp_receive_timeout >= 0)
4280 smtp_receive_timeout = arg_smtp_receive_timeout;
4282 /* If Exim was started with root privilege, unless we have already removed the
4283 root privilege above as a result of -C, -D, -be, -bf or -bF, remove it now
4284 except when starting the daemon or doing some kind of delivery or address
4285 testing (-bt). These are the only cases when root need to be retained. We run
4286 as exim for -bv and -bh. However, if deliver_drop_privilege is set, root is
4287 retained only for starting the daemon. We always do the initgroups() in this
4288 situation (controlled by the TRUE below), in order to be as close as possible
4289 to the state Exim usually runs in. */
4291 if (!unprivileged && /* originally had root AND */
4292 !removed_privilege && /* still got root AND */
4293 !f.daemon_listen && /* not starting the daemon */
4294 queue_interval <= 0 && /* (either kind of daemon) */
4296 deliver_drop_privilege || /* requested unprivileged */
4298 queue_interval < 0 && /* not running the queue */
4299 (msg_action_arg < 0 || /* and */
4300 msg_action != MSG_DELIVER) && /* not delivering and */
4301 (!checking || !f.address_test_mode) /* not address checking */
4303 exim_setugid(exim_uid, exim_gid, TRUE, US"privilege not needed");
4305 /* When we are retaining a privileged uid, we still change to the exim gid. */
4310 DEBUG(D_any) debug_printf("dropping to exim gid; retaining priv uid\n");
4311 rv = setgid(exim_gid);
4312 /* Impact of failure is that some stuff might end up with an incorrect group.
4313 We track this for failures from root, since any attempt to change privilege
4314 by root should succeed and failures should be examined. For non-root,
4315 there's no security risk. For me, it's { exim -bV } on a just-built binary,
4316 no need to complain then. */
4318 if (!(unprivileged || removed_privilege))
4319 exim_fail("exim: changing group failed: %s\n", strerror(errno));
4321 DEBUG(D_any) debug_printf("changing group to %ld failed: %s\n",
4322 (long int)exim_gid, strerror(errno));
4325 /* Handle a request to scan a file for malware */
4326 if (malware_test_file)
4328 #ifdef WITH_CONTENT_SCAN
4330 set_process_info("scanning file for malware");
4331 result = malware_in_file(malware_test_file);
4334 printf("No malware found.\n");
4339 printf("Malware lookup returned non-okay/fail: %d\n", result);
4343 printf("Malware found: %s\n", malware_name);
4345 printf("Malware scan detected malware of unknown name.\n");
4347 printf("Malware scanning not enabled at compile time.\n");
4352 /* Handle a request to list the delivery queue */
4356 set_process_info("listing the queue");
4357 queue_list(list_queue_option, argv + recipients_arg, argc - recipients_arg);
4361 /* Handle a request to count the delivery queue */
4365 set_process_info("counting the queue");
4366 fprintf(stdout, "%u\n", queue_count());
4370 /* Handle actions on specific messages, except for the force delivery and
4371 message load actions, which are done below. Some actions take a whole list of
4372 message ids, which are known to continue up to the end of the arguments. Others
4373 take a single message id and then operate on the recipients list. */
4375 if (msg_action_arg > 0 && msg_action != MSG_DELIVER && msg_action != MSG_LOAD)
4377 int yield = EXIT_SUCCESS;
4378 set_process_info("acting on specified messages");
4380 /* ACL definitions may be needed when removing a message (-Mrm) because
4381 event_action gets expanded */
4383 if (msg_action == MSG_REMOVE)
4386 if (!one_msg_action)
4388 for (i = msg_action_arg; i < argc; i++)
4389 if (!queue_action(argv[i], msg_action, NULL, 0, 0))
4390 yield = EXIT_FAILURE;
4393 case MSG_REMOVE: case MSG_FREEZE: case MSG_THAW: break;
4394 default: printf("\n"); break;
4398 else if (!queue_action(argv[msg_action_arg], msg_action, argv, argc,
4399 recipients_arg)) yield = EXIT_FAILURE;
4403 /* We used to set up here to skip reading the ACL section, on
4404 (msg_action_arg > 0 || (queue_interval == 0 && !f.daemon_listen)
4405 Now, since the intro of the ${acl } expansion, ACL definitions may be
4406 needed in transports so we lost the optimisation. */
4409 #ifdef MEASURE_TIMING
4410 struct timeval t0, diff;
4411 (void)gettimeofday(&t0, NULL);
4416 #ifdef MEASURE_TIMING
4417 report_time_since(&t0, US"readconf_rest (delta)");
4421 /* Handle the -brt option. This is for checking out retry configurations.
4422 The next three arguments are a domain name or a complete address, and
4423 optionally two error numbers. All it does is to call the function that
4424 scans the retry configuration data. */
4426 if (test_retry_arg >= 0)
4428 retry_config *yield;
4429 int basic_errno = 0;
4433 if (test_retry_arg >= argc)
4435 printf("-brt needs a domain or address argument\n");
4436 exim_exit(EXIT_FAILURE, US"main");
4438 s1 = argv[test_retry_arg++];
4441 /* If the first argument contains no @ and no . it might be a local user
4442 or it might be a single-component name. Treat as a domain. */
4444 if (Ustrchr(s1, '@') == NULL && Ustrchr(s1, '.') == NULL)
4446 printf("Warning: \"%s\" contains no '@' and no '.' characters. It is "
4447 "being \ntreated as a one-component domain, not as a local part.\n\n",
4451 /* There may be an optional second domain arg. */
4453 if (test_retry_arg < argc && Ustrchr(argv[test_retry_arg], '.') != NULL)
4454 s2 = argv[test_retry_arg++];
4456 /* The final arg is an error name */
4458 if (test_retry_arg < argc)
4460 uschar *ss = argv[test_retry_arg];
4462 readconf_retry_error(ss, ss + Ustrlen(ss), &basic_errno, &more_errno);
4465 printf("%s\n", CS error);
4466 return EXIT_FAILURE;
4469 /* For the {MAIL,RCPT,DATA}_4xx errors, a value of 255 means "any", and a
4470 code > 100 as an error is for matching codes to the decade. Turn them into
4471 a real error code, off the decade. */
4473 if (basic_errno == ERRNO_MAIL4XX ||
4474 basic_errno == ERRNO_RCPT4XX ||
4475 basic_errno == ERRNO_DATA4XX)
4477 int code = (more_errno >> 8) & 255;
4479 more_errno = (more_errno & 0xffff00ff) | (21 << 8);
4480 else if (code > 100)
4481 more_errno = (more_errno & 0xffff00ff) | ((code - 96) << 8);
4485 if (!(yield = retry_find_config(s1, s2, basic_errno, more_errno)))
4486 printf("No retry information found\n");
4489 more_errno = yield->more_errno;
4490 printf("Retry rule: %s ", yield->pattern);
4492 if (yield->basic_errno == ERRNO_EXIMQUOTA)
4494 printf("quota%s%s ",
4495 (more_errno > 0)? "_" : "",
4496 (more_errno > 0)? readconf_printtime(more_errno) : US"");
4498 else if (yield->basic_errno == ECONNREFUSED)
4500 printf("refused%s%s ",
4501 (more_errno > 0)? "_" : "",
4502 (more_errno == 'M')? "MX" :
4503 (more_errno == 'A')? "A" : "");
4505 else if (yield->basic_errno == ETIMEDOUT)
4508 if ((more_errno & RTEF_CTOUT) != 0) printf("_connect");
4510 if (more_errno != 0) printf("_%s",
4511 (more_errno == 'M')? "MX" : "A");
4514 else if (yield->basic_errno == ERRNO_AUTHFAIL)
4515 printf("auth_failed ");
4518 for (retry_rule * r = yield->rules; r; r = r->next)
4520 printf("%c,%s", r->rule, readconf_printtime(r->timeout)); /* Do not */
4521 printf(",%s", readconf_printtime(r->p1)); /* amalgamate */
4527 printf(",%d.", x/1000);
4541 exim_exit(EXIT_SUCCESS, US"main");
4544 /* Handle a request to list one or more configuration options */
4545 /* If -n was set, we suppress some information */
4550 set_process_info("listing variables");
4551 if (recipients_arg >= argc)
4552 fail = !readconf_print(US"all", NULL, flag_n);
4553 else for (i = recipients_arg; i < argc; i++)
4556 (Ustrcmp(argv[i], "router") == 0 ||
4557 Ustrcmp(argv[i], "transport") == 0 ||
4558 Ustrcmp(argv[i], "authenticator") == 0 ||
4559 Ustrcmp(argv[i], "macro") == 0 ||
4560 Ustrcmp(argv[i], "environment") == 0))
4562 fail |= !readconf_print(argv[i+1], argv[i], flag_n);
4566 fail = !readconf_print(argv[i], NULL, flag_n);
4568 exim_exit(fail ? EXIT_FAILURE : EXIT_SUCCESS, US"main");
4573 set_process_info("listing config");
4574 exim_exit(readconf_print(US"config", NULL, flag_n)
4575 ? EXIT_SUCCESS : EXIT_FAILURE, US"main");
4579 /* Initialise subsystems as required. */
4583 /* Handle a request to deliver one or more messages that are already on the
4584 queue. Values of msg_action other than MSG_DELIVER and MSG_LOAD are dealt with
4585 above. MSG_LOAD is handled with -be (which is the only time it applies) below.
4587 Delivery of specific messages is typically used for a small number when
4588 prodding by hand (when the option forced_delivery will be set) or when
4589 re-execing to regain root privilege. Each message delivery must happen in a
4590 separate process, so we fork a process for each one, and run them sequentially
4591 so that debugging output doesn't get intertwined, and to avoid spawning too
4592 many processes if a long list is given. However, don't fork for the last one;
4593 this saves a process in the common case when Exim is called to deliver just one
4596 if (msg_action_arg > 0 && msg_action != MSG_LOAD)
4598 if (prod_requires_admin && !f.admin_user)
4600 fprintf(stderr, "exim: Permission denied\n");
4601 exim_exit(EXIT_FAILURE, US"main");
4603 set_process_info("delivering specified messages");
4604 if (deliver_give_up) forced_delivery = f.deliver_force_thaw = TRUE;
4605 for (i = msg_action_arg; i < argc; i++)
4610 (void)deliver_message(argv[i], forced_delivery, deliver_give_up);
4611 else if ((pid = fork()) == 0)
4613 (void)deliver_message(argv[i], forced_delivery, deliver_give_up);
4614 exim_underbar_exit(EXIT_SUCCESS, US"cmdline-delivery");
4618 fprintf(stderr, "failed to fork delivery process for %s: %s\n", argv[i],
4620 exim_exit(EXIT_FAILURE, US"main");
4624 exim_exit(EXIT_SUCCESS, US"main");
4628 /* If only a single queue run is requested, without SMTP listening, we can just
4629 turn into a queue runner, with an optional starting message id. */
4631 if (queue_interval == 0 && !f.daemon_listen)
4633 DEBUG(D_queue_run) debug_printf("Single queue run%s%s%s%s\n",
4634 start_queue_run_id ? US" starting at " : US"",
4635 start_queue_run_id ? start_queue_run_id: US"",
4636 stop_queue_run_id ? US" stopping at " : US"",
4637 stop_queue_run_id ? stop_queue_run_id : US"");
4639 set_process_info("running the '%s' queue (single queue run)", queue_name);
4641 set_process_info("running the queue (single queue run)");
4642 queue_run(start_queue_run_id, stop_queue_run_id, FALSE);
4643 exim_exit(EXIT_SUCCESS, US"main");
4647 /* Find the login name of the real user running this process. This is always
4648 needed when receiving a message, because it is written into the spool file. It
4649 may also be used to construct a from: or a sender: header, and in this case we
4650 need the user's full name as well, so save a copy of it, checked for RFC822
4651 syntax and munged if necessary, if it hasn't previously been set by the -F
4652 argument. We may try to get the passwd entry more than once, in case NIS or
4653 other delays are in evidence. Save the home directory for use in filter testing
4658 if ((pw = getpwuid(real_uid)) != NULL)
4660 originator_login = string_copy(US pw->pw_name);
4661 originator_home = string_copy(US pw->pw_dir);
4663 /* If user name has not been set by -F, set it from the passwd entry
4664 unless -f has been used to set the sender address by a trusted user. */
4666 if (!originator_name)
4668 if (!sender_address || (!f.trusted_caller && filter_test == FTEST_NONE))
4670 uschar *name = US pw->pw_gecos;
4671 uschar *amp = Ustrchr(name, '&');
4674 /* Most Unix specify that a '&' character in the gecos field is
4675 replaced by a copy of the login name, and some even specify that
4676 the first character should be upper cased, so that's what we do. */
4681 string_format(buffer, sizeof(buffer), "%.*s%n%s%s",
4682 (int)(amp - name), name, &loffset, originator_login, amp + 1);
4683 buffer[loffset] = toupper(buffer[loffset]);
4687 /* If a pattern for matching the gecos field was supplied, apply
4688 it and then expand the name string. */
4690 if (gecos_pattern && gecos_name)
4693 re = regex_must_compile(gecos_pattern, FALSE, TRUE); /* Use malloc */
4695 if (regex_match_and_setup(re, name, 0, -1))
4697 uschar *new_name = expand_string(gecos_name);
4701 DEBUG(D_receive) debug_printf("user name \"%s\" extracted from "
4702 "gecos field \"%s\"\n", new_name, name);
4705 else DEBUG(D_receive) debug_printf("failed to expand gecos_name string "
4706 "\"%s\": %s\n", gecos_name, expand_string_message);
4708 else DEBUG(D_receive) debug_printf("gecos_pattern \"%s\" did not match "
4709 "gecos field \"%s\"\n", gecos_pattern, name);
4710 store_free((void *)re);
4712 originator_name = string_copy(name);
4715 /* A trusted caller has used -f but not -F */
4717 else originator_name = US"";
4720 /* Break the retry loop */
4725 if (++i > finduser_retries) break;
4729 /* If we cannot get a user login, log the incident and give up, unless the
4730 configuration specifies something to use. When running in the test harness,
4731 any setting of unknown_login overrides the actual name. */
4733 if (originator_login == NULL || f.running_in_test_harness)
4735 if (unknown_login != NULL)
4737 originator_login = expand_string(unknown_login);
4738 if (originator_name == NULL && unknown_username != NULL)
4739 originator_name = expand_string(unknown_username);
4740 if (originator_name == NULL) originator_name = US"";
4742 if (originator_login == NULL)
4743 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Failed to get user name for uid %d",
4747 /* Ensure that the user name is in a suitable form for use as a "phrase" in an
4750 originator_name = string_copy(parse_fix_phrase(originator_name,
4751 Ustrlen(originator_name), big_buffer, big_buffer_size));
4753 /* If a message is created by this call of Exim, the uid/gid of its originator
4754 are those of the caller. These values are overridden if an existing message is
4755 read in from the spool. */
4757 originator_uid = real_uid;
4758 originator_gid = real_gid;
4760 DEBUG(D_receive) debug_printf("originator: uid=%d gid=%d login=%s name=%s\n",
4761 (int)originator_uid, (int)originator_gid, originator_login, originator_name);
4763 /* Run in daemon and/or queue-running mode. The function daemon_go() never
4764 returns. We leave this till here so that the originator_ fields are available
4765 for incoming messages via the daemon. The daemon cannot be run in mua_wrapper
4768 if (f.daemon_listen || f.inetd_wait_mode || queue_interval > 0)
4772 fprintf(stderr, "Daemon cannot be run when mua_wrapper is set\n");
4773 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Daemon cannot be run when "
4774 "mua_wrapper is set");
4777 # ifndef DISABLE_TLS
4778 /* This also checks that the library linkage is working and we can call
4779 routines in it, so call even if tls_require_ciphers is unset */
4781 # ifdef MEASURE_TIMING
4782 struct timeval t0, diff;
4783 (void)gettimeofday(&t0, NULL);
4785 if (!tls_dropprivs_validate_require_cipher(FALSE))
4787 # ifdef MEASURE_TIMING
4788 report_time_since(&t0, US"validate_ciphers (delta)");
4796 /* If the sender ident has not been set (by a trusted caller) set it to
4797 the caller. This will get overwritten below for an inetd call. If a trusted
4798 caller has set it empty, unset it. */
4800 if (!sender_ident) sender_ident = originator_login;
4801 else if (!*sender_ident) sender_ident = NULL;
4803 /* Handle the -brw option, which is for checking out rewriting rules. Cause log
4804 writes (on errors) to go to stderr instead. Can't do this earlier, as want the
4805 originator_* variables set. */
4807 if (test_rewrite_arg >= 0)
4809 f.really_exim = FALSE;
4810 if (test_rewrite_arg >= argc)
4812 printf("-brw needs an address argument\n");
4813 exim_exit(EXIT_FAILURE, US"main");
4815 rewrite_test(argv[test_rewrite_arg]);
4816 exim_exit(EXIT_SUCCESS, US"main");
4819 /* A locally-supplied message is considered to be coming from a local user
4820 unless a trusted caller supplies a sender address with -f, or is passing in the
4821 message via SMTP (inetd invocation or otherwise). */
4823 if ( !sender_address && !smtp_input
4824 || !f.trusted_caller && filter_test == FTEST_NONE)
4826 f.sender_local = TRUE;
4828 /* A trusted caller can supply authenticated_sender and authenticated_id
4829 via -oMas and -oMai and if so, they will already be set. Otherwise, force
4830 defaults except when host checking. */
4832 if (!authenticated_sender && !host_checking)
4833 authenticated_sender = string_sprintf("%s@%s", originator_login,
4834 qualify_domain_sender);
4835 if (!authenticated_id && !host_checking)
4836 authenticated_id = originator_login;
4839 /* Trusted callers are always permitted to specify the sender address.
4840 Untrusted callers may specify it if it matches untrusted_set_sender, or if what
4841 is specified is the empty address. However, if a trusted caller does not
4842 specify a sender address for SMTP input, we leave sender_address unset. This
4843 causes the MAIL commands to be honoured. */
4845 if ( !smtp_input && !sender_address
4846 || !receive_check_set_sender(sender_address))
4848 /* Either the caller is not permitted to set a general sender, or this is
4849 non-SMTP input and the trusted caller has not set a sender. If there is no
4850 sender, or if a sender other than <> is set, override with the originator's
4851 login (which will get qualified below), except when checking things. */
4853 if (sender_address == NULL /* No sender_address set */
4855 (sender_address[0] != 0 && /* Non-empty sender address, AND */
4856 !checking)) /* Not running tests, including filter tests */
4858 sender_address = originator_login;
4859 f.sender_address_forced = FALSE;
4860 sender_address_domain = 0;
4864 /* Remember whether an untrusted caller set the sender address */
4866 f.sender_set_untrusted = sender_address != originator_login && !f.trusted_caller;
4868 /* Ensure that the sender address is fully qualified unless it is the empty
4869 address, which indicates an error message, or doesn't exist (root caller, smtp
4870 interface, no -f argument). */
4872 if (sender_address && *sender_address && sender_address_domain == 0)
4873 sender_address = string_sprintf("%s@%s", local_part_quote(sender_address),
4874 qualify_domain_sender);
4876 DEBUG(D_receive) debug_printf("sender address = %s\n", sender_address);
4878 /* Handle a request to verify a list of addresses, or test them for delivery.
4879 This must follow the setting of the sender address, since routers can be
4880 predicated upon the sender. If no arguments are given, read addresses from
4881 stdin. Set debug_level to at least D_v to get full output for address testing.
4884 if (verify_address_mode || f.address_test_mode)
4887 int flags = vopt_qualify;
4889 if (verify_address_mode)
4891 if (!verify_as_sender) flags |= vopt_is_recipient;
4892 DEBUG(D_verify) debug_print_ids(US"Verifying:");
4897 flags |= vopt_is_recipient;
4898 debug_selector |= D_v;
4899 debug_file = stderr;
4900 debug_fd = fileno(debug_file);
4901 DEBUG(D_verify) debug_print_ids(US"Address testing:");
4904 if (recipients_arg < argc)
4906 while (recipients_arg < argc)
4908 /* Supplied addresses are tainted since they come from a user */
4909 uschar * s = string_copy_taint(argv[recipients_arg++], TRUE);
4912 BOOL finished = FALSE;
4913 uschar *ss = parse_find_address_end(s, FALSE);
4914 if (*ss == ',') *ss = 0; else finished = TRUE;
4915 test_address(s, flags, &exit_value);
4918 while (*++s == ',' || isspace(*s)) ;
4925 uschar * s = get_stdinput(NULL, NULL);
4927 test_address(string_copy_taint(s, TRUE), flags, &exit_value);
4931 exim_exit(exit_value, US"main");
4934 /* Handle expansion checking. Either expand items on the command line, or read
4935 from stdin if there aren't any. If -Mset was specified, load the message so
4936 that its variables can be used, but restrict this facility to admin users.
4937 Otherwise, if -bem was used, read a message from stdin. */
4941 dns_init(FALSE, FALSE, FALSE);
4942 if (msg_action_arg > 0 && msg_action == MSG_LOAD)
4944 uschar spoolname[256]; /* Not big_buffer; used in spool_read_header() */
4946 exim_fail("exim: permission denied\n");
4947 message_id = argv[msg_action_arg];
4948 (void)string_format(spoolname, sizeof(spoolname), "%s-H", message_id);
4949 if ((deliver_datafile = spool_open_datafile(message_id)) < 0)
4950 printf ("Failed to load message datafile %s\n", message_id);
4951 if (spool_read_header(spoolname, TRUE, FALSE) != spool_read_OK)
4952 printf ("Failed to load message %s\n", message_id);
4955 /* Read a test message from a file. We fudge it up to be on stdin, saving
4956 stdin itself for later reading of expansion strings. */
4958 else if (expansion_test_message)
4960 int save_stdin = dup(0);
4961 int fd = Uopen(expansion_test_message, O_RDONLY, 0);
4963 exim_fail("exim: failed to open %s: %s\n", expansion_test_message,
4966 filter_test = FTEST_USER; /* Fudge to make it look like filter test */
4967 message_ended = END_NOTENDED;
4968 read_message_body(receive_msg(extract_recipients));
4969 message_linecount += body_linecount;
4970 (void)dup2(save_stdin, 0);
4971 (void)close(save_stdin);
4972 clearerr(stdin); /* Required by Darwin */
4975 /* Only admin users may see config-file macros this way */
4977 if (!f.admin_user) macros_user = macros = mlast = NULL;
4979 /* Allow $recipients for this testing */
4981 f.enable_dollar_recipients = TRUE;
4983 /* Expand command line items */
4985 if (recipients_arg < argc)
4986 while (recipients_arg < argc)
4987 expansion_test_line(argv[recipients_arg++]);
4993 char *(*fn_readline)(const char *) = NULL;
4994 void (*fn_addhist)(const char *) = NULL;
4998 void *dlhandle = set_readline(&fn_readline, &fn_addhist);
5001 while (s = get_stdinput(fn_readline, fn_addhist))
5002 expansion_test_line(s);
5005 if (dlhandle) dlclose(dlhandle);
5009 /* The data file will be open after -Mset */
5011 if (deliver_datafile >= 0)
5013 (void)close(deliver_datafile);
5014 deliver_datafile = -1;
5017 exim_exit(EXIT_SUCCESS, US"main: expansion test");
5021 /* The active host name is normally the primary host name, but it can be varied
5022 for hosts that want to play several parts at once. We need to ensure that it is
5023 set for host checking, and for receiving messages. */
5025 smtp_active_hostname = primary_hostname;
5026 if (raw_active_hostname != NULL)
5028 uschar *nah = expand_string(raw_active_hostname);
5031 if (!f.expand_string_forcedfail)
5032 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to expand \"%s\" "
5033 "(smtp_active_hostname): %s", raw_active_hostname,
5034 expand_string_message);
5036 else if (nah[0] != 0) smtp_active_hostname = nah;
5039 /* Handle host checking: this facility mocks up an incoming SMTP call from a
5040 given IP address so that the blocking and relay configuration can be tested.
5041 Unless a sender_ident was set by -oMt, we discard it (the default is the
5042 caller's login name). An RFC 1413 call is made only if we are running in the
5043 test harness and an incoming interface and both ports are specified, because
5044 there is no TCP/IP call to find the ident for. */
5051 if (!sender_ident_set)
5053 sender_ident = NULL;
5054 if (f.running_in_test_harness && sender_host_port
5055 && interface_address && interface_port)
5056 verify_get_ident(1223); /* note hardwired port number */
5059 /* In case the given address is a non-canonical IPv6 address, canonicalize
5060 it. The code works for both IPv4 and IPv6, as it happens. */
5062 size = host_aton(sender_host_address, x);
5063 sender_host_address = store_get(48, FALSE); /* large enough for full IPv6 */
5064 (void)host_nmtoa(size, x, -1, sender_host_address, ':');
5066 /* Now set up for testing */
5068 host_build_sender_fullhost();
5072 f.sender_local = FALSE;
5073 f.sender_host_notsocket = TRUE;
5074 debug_file = stderr;
5075 debug_fd = fileno(debug_file);
5076 fprintf(stdout, "\n**** SMTP testing session as if from host %s\n"
5077 "**** but without any ident (RFC 1413) callback.\n"
5078 "**** This is not for real!\n\n",
5079 sender_host_address);
5081 memset(sender_host_cache, 0, sizeof(sender_host_cache));
5082 if (verify_check_host(&hosts_connection_nolog) == OK)
5083 BIT_CLEAR(log_selector, log_selector_size, Li_smtp_connection);
5084 log_write(L_smtp_connection, LOG_MAIN, "%s", smtp_get_connection_info());
5086 /* NOTE: We do *not* call smtp_log_no_mail() if smtp_start_session() fails,
5087 because a log line has already been written for all its failure exists
5088 (usually "connection refused: <reason>") and writing another one is
5089 unnecessary clutter. */
5091 if (smtp_start_session())
5093 for (; (reset_point = store_mark()); store_reset(reset_point))
5095 if (smtp_setup_msg() <= 0) break;
5096 if (!receive_msg(FALSE)) break;
5098 return_path = sender_address = NULL;
5099 dnslist_domain = dnslist_matched = NULL;
5100 #ifndef DISABLE_DKIM
5101 dkim_cur_signer = NULL;
5104 deliver_localpart_orig = NULL;
5105 deliver_domain_orig = NULL;
5106 callout_address = sending_ip_address = NULL;
5107 sender_rate = sender_rate_limit = sender_rate_period = NULL;
5111 exim_exit(EXIT_SUCCESS, US"main");
5115 /* Arrange for message reception if recipients or SMTP were specified;
5116 otherwise complain unless a version print (-bV) happened or this is a filter
5117 verification test or info dump.
5118 In the former case, show the configuration file name. */
5120 if (recipients_arg >= argc && !extract_recipients && !smtp_input)
5122 if (version_printed)
5124 if (Ustrchr(config_main_filelist, ':'))
5125 printf("Configuration file search path is %s\n", config_main_filelist);
5126 printf("Configuration file is %s\n", config_main_filename);
5127 return EXIT_SUCCESS;
5130 if (info_flag != CMDINFO_NONE)
5132 show_exim_information(info_flag, info_stdout ? stdout : stderr);
5133 return info_stdout ? EXIT_SUCCESS : EXIT_FAILURE;
5136 if (filter_test == FTEST_NONE)
5137 exim_usage(called_as);
5141 /* If mua_wrapper is set, Exim is being used to turn an MUA that submits on the
5142 standard input into an MUA that submits to a smarthost over TCP/IP. We know
5143 that we are not called from inetd, because that is rejected above. The
5144 following configuration settings are forced here:
5146 (1) Synchronous delivery (-odi)
5147 (2) Errors to stderr (-oep == -oeq)
5148 (3) No parallel remote delivery
5149 (4) Unprivileged delivery
5151 We don't force overall queueing options because there are several of them;
5152 instead, queueing is avoided below when mua_wrapper is set. However, we do need
5153 to override any SMTP queueing. */
5157 f.synchronous_delivery = TRUE;
5158 arg_error_handling = ERRORS_STDERR;
5159 remote_max_parallel = 1;
5160 deliver_drop_privilege = TRUE;
5161 f.queue_smtp = FALSE;
5162 queue_smtp_domains = NULL;
5164 message_utf8_downconvert = -1; /* convert-if-needed */
5169 /* Prepare to accept one or more new messages on the standard input. When a
5170 message has been read, its id is returned in message_id[]. If doing immediate
5171 delivery, we fork a delivery process for each received message, except for the
5172 last one, where we can save a process switch.
5174 It is only in non-smtp mode that error_handling is allowed to be changed from
5175 its default of ERRORS_SENDER by argument. (Idle thought: are any of the
5176 sendmail error modes other than -oem ever actually used? Later: yes.) */
5178 if (!smtp_input) error_handling = arg_error_handling;
5180 /* If this is an inetd call, ensure that stderr is closed to prevent panic
5181 logging being sent down the socket and make an identd call to get the
5184 else if (f.is_inetd)
5186 (void)fclose(stderr);
5187 exim_nullstd(); /* Re-open to /dev/null */
5188 verify_get_ident(IDENT_PORT);
5189 host_build_sender_fullhost();
5190 set_process_info("handling incoming connection from %s via inetd",
5194 /* If the sender host address has been set, build sender_fullhost if it hasn't
5195 already been done (which it will have been for inetd). This caters for the
5196 case when it is forced by -oMa. However, we must flag that it isn't a socket,
5197 so that the test for IP options is skipped for -bs input. */
5199 if (sender_host_address && !sender_fullhost)
5201 host_build_sender_fullhost();
5202 set_process_info("handling incoming connection from %s via -oMa",
5204 f.sender_host_notsocket = TRUE;
5207 /* Otherwise, set the sender host as unknown except for inetd calls. This
5208 prevents host checking in the case of -bs not from inetd and also for -bS. */
5210 else if (!f.is_inetd) f.sender_host_unknown = TRUE;
5212 /* If stdout does not exist, then dup stdin to stdout. This can happen
5213 if exim is started from inetd. In this case fd 0 will be set to the socket,
5214 but fd 1 will not be set. This also happens for passed SMTP channels. */
5216 if (fstat(1, &statbuf) < 0) (void)dup2(0, 1);
5218 /* Set up the incoming protocol name and the state of the program. Root is
5219 allowed to force received protocol via the -oMr option above. If we have come
5220 via inetd, the process info has already been set up. We don't set
5221 received_protocol here for smtp input, as it varies according to
5222 batch/HELO/EHLO/AUTH/TLS. */
5226 if (!f.is_inetd) set_process_info("accepting a local %sSMTP message from <%s>",
5227 smtp_batched_input? "batched " : "",
5228 (sender_address!= NULL)? sender_address : originator_login);
5232 int old_pool = store_pool;
5233 store_pool = POOL_PERM;
5234 if (!received_protocol)
5235 received_protocol = string_sprintf("local%s", called_as);
5236 store_pool = old_pool;
5237 set_process_info("accepting a local non-SMTP message from <%s>",
5241 /* Initialize the session_local_queue-only flag (this will be ignored if
5242 mua_wrapper is set) */
5245 session_local_queue_only = queue_only;
5247 /* For non-SMTP and for batched SMTP input, check that there is enough space on
5248 the spool if so configured. On failure, we must not attempt to send an error
5249 message! (For interactive SMTP, the check happens at MAIL FROM and an SMTP
5250 error code is given.) */
5252 if ((!smtp_input || smtp_batched_input) && !receive_check_fs(0))
5253 exim_fail("exim: insufficient disk space\n");
5255 /* If this is smtp input of any kind, real or batched, handle the start of the
5258 NOTE: We do *not* call smtp_log_no_mail() if smtp_start_session() fails,
5259 because a log line has already been written for all its failure exists
5260 (usually "connection refused: <reason>") and writing another one is
5261 unnecessary clutter. */
5267 memset(sender_host_cache, 0, sizeof(sender_host_cache));
5268 if (verify_check_host(&hosts_connection_nolog) == OK)
5269 BIT_CLEAR(log_selector, log_selector_size, Li_smtp_connection);
5270 log_write(L_smtp_connection, LOG_MAIN, "%s", smtp_get_connection_info());
5271 if (!smtp_start_session())
5274 exim_exit(EXIT_SUCCESS, US"smtp_start toplevel");
5278 /* Otherwise, set up the input size limit here. */
5282 thismessage_size_limit = expand_string_integer(message_size_limit, TRUE);
5283 if (expand_string_message)
5284 if (thismessage_size_limit == -1)
5285 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to expand "
5286 "message_size_limit: %s", expand_string_message);
5288 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "invalid value for "
5289 "message_size_limit: %s", expand_string_message);
5292 /* Loop for several messages when reading SMTP input. If we fork any child
5293 processes, we don't want to wait for them unless synchronous delivery is
5294 requested, so set SIGCHLD to SIG_IGN in that case. This is not necessarily the
5295 same as SIG_DFL, despite the fact that documentation often lists the default as
5296 "ignore". This is a confusing area. This is what I know:
5298 At least on some systems (e.g. Solaris), just setting SIG_IGN causes child
5299 processes that complete simply to go away without ever becoming defunct. You
5300 can't then wait for them - but we don't want to wait for them in the
5301 non-synchronous delivery case. However, this behaviour of SIG_IGN doesn't
5302 happen for all OS (e.g. *BSD is different).
5304 But that's not the end of the story. Some (many? all?) systems have the
5305 SA_NOCLDWAIT option for sigaction(). This requests the behaviour that Solaris
5306 has by default, so it seems that the difference is merely one of default
5307 (compare restarting vs non-restarting signals).
5309 To cover all cases, Exim sets SIG_IGN with SA_NOCLDWAIT here if it can. If not,
5310 it just sets SIG_IGN. To be on the safe side it also calls waitpid() at the end
5311 of the loop below. Paranoia rules.
5313 February 2003: That's *still* not the end of the story. There are now versions
5314 of Linux (where SIG_IGN does work) that are picky. If, having set SIG_IGN, a
5315 process then calls waitpid(), a grumble is written to the system log, because
5316 this is logically inconsistent. In other words, it doesn't like the paranoia.
5317 As a consequence of this, the waitpid() below is now excluded if we are sure
5318 that SIG_IGN works. */
5320 if (!f.synchronous_delivery)
5323 struct sigaction act;
5324 act.sa_handler = SIG_IGN;
5325 sigemptyset(&(act.sa_mask));
5326 act.sa_flags = SA_NOCLDWAIT;
5327 sigaction(SIGCHLD, &act, NULL);
5329 signal(SIGCHLD, SIG_IGN);
5333 /* Save the current store pool point, for resetting at the start of
5334 each message, and save the real sender address, if any. */
5336 real_sender_address = sender_address;
5338 /* Loop to receive messages; receive_msg() returns TRUE if there are more
5339 messages to be read (SMTP input), or FALSE otherwise (not SMTP, or SMTP channel
5344 reset_point = store_mark();
5347 /* Handle the SMTP case; call smtp_setup_mst() to deal with the initial SMTP
5348 input and build the recipients list, before calling receive_msg() to read the
5349 message proper. Whatever sender address is given in the SMTP transaction is
5350 often ignored for local senders - we use the actual sender, which is normally
5351 either the underlying user running this process or a -f argument provided by
5352 a trusted caller. It is saved in real_sender_address. The test for whether to
5353 accept the SMTP sender is encapsulated in receive_check_set_sender(). */
5358 if ((rc = smtp_setup_msg()) > 0)
5360 if (real_sender_address != NULL &&
5361 !receive_check_set_sender(sender_address))
5363 sender_address = raw_sender = real_sender_address;
5364 sender_address_unrewritten = NULL;
5367 /* For batched SMTP, we have to run the acl_not_smtp_start ACL, since it
5368 isn't really SMTP, so no other ACL will run until the acl_not_smtp one at
5369 the very end. The result of the ACL is ignored (as for other non-SMTP
5370 messages). It is run for its potential side effects. */
5372 if (smtp_batched_input && acl_not_smtp_start != NULL)
5374 uschar *user_msg, *log_msg;
5375 f.enable_dollar_recipients = TRUE;
5376 (void)acl_check(ACL_WHERE_NOTSMTP_START, NULL, acl_not_smtp_start,
5377 &user_msg, &log_msg);
5378 f.enable_dollar_recipients = FALSE;
5381 /* Now get the data for the message */
5383 more = receive_msg(extract_recipients);
5384 if (message_id[0] == 0)
5386 cancel_cutthrough_connection(TRUE, US"receive dropped");
5387 if (more) goto moreloop;
5388 smtp_log_no_mail(); /* Log no mail if configured */
5389 exim_exit(EXIT_FAILURE, US"receive toplevel");
5394 cancel_cutthrough_connection(TRUE, US"message setup dropped");
5395 smtp_log_no_mail(); /* Log no mail if configured */
5396 exim_exit(rc ? EXIT_FAILURE : EXIT_SUCCESS, US"msg setup toplevel");
5400 /* In the non-SMTP case, we have all the information from the command
5401 line, but must process it in case it is in the more general RFC822
5402 format, and in any case, to detect syntax errors. Also, it appears that
5403 the use of comma-separated lists as single arguments is common, so we
5404 had better support them. */
5409 int count = argc - recipients_arg;
5410 uschar **list = argv + recipients_arg;
5412 /* These options cannot be changed dynamically for non-SMTP messages */
5414 f.active_local_sender_retain = local_sender_retain;
5415 f.active_local_from_check = local_from_check;
5417 /* Save before any rewriting */
5419 raw_sender = string_copy(sender_address);
5421 /* Loop for each argument (supplied by user hence tainted) */
5423 for (int i = 0; i < count; i++)
5425 int start, end, domain;
5427 uschar * s = string_copy_taint(list[i], TRUE);
5429 /* Loop for each comma-separated address */
5433 BOOL finished = FALSE;
5435 uschar *ss = parse_find_address_end(s, FALSE);
5437 if (*ss == ',') *ss = 0; else finished = TRUE;
5439 /* Check max recipients - if -t was used, these aren't recipients */
5441 if (recipients_max > 0 && ++rcount > recipients_max &&
5442 !extract_recipients)
5443 if (error_handling == ERRORS_STDERR)
5445 fprintf(stderr, "exim: too many recipients\n");
5446 exim_exit(EXIT_FAILURE, US"main");
5450 moan_to_sender(ERRMESS_TOOMANYRECIP, NULL, NULL, stdin, TRUE)?
5451 errors_sender_rc : EXIT_FAILURE;
5455 BOOL b = allow_utf8_domains;
5456 allow_utf8_domains = TRUE;
5459 parse_extract_address(s, &errmess, &start, &end, &domain, FALSE);
5462 if (string_is_utf8(recipient))
5463 message_smtputf8 = TRUE;
5465 allow_utf8_domains = b;
5468 if (domain == 0 && !f.allow_unqualified_recipient)
5471 errmess = US"unqualified recipient address not allowed";
5474 if (recipient == NULL)
5476 if (error_handling == ERRORS_STDERR)
5478 fprintf(stderr, "exim: bad recipient address \"%s\": %s\n",
5479 string_printing(list[i]), errmess);
5480 exim_exit(EXIT_FAILURE, US"main");
5486 eblock.text1 = string_printing(list[i]);
5487 eblock.text2 = errmess;
5489 moan_to_sender(ERRMESS_BADARGADDRESS, &eblock, NULL, stdin, TRUE)?
5490 errors_sender_rc : EXIT_FAILURE;
5494 receive_add_recipient(string_copy_taint(recipient, TRUE), -1);
5497 while (*(++s) != 0 && (*s == ',' || isspace(*s)));
5501 /* Show the recipients when debugging */
5505 if (sender_address != NULL) debug_printf("Sender: %s\n", sender_address);
5506 if (recipients_list != NULL)
5508 debug_printf("Recipients:\n");
5509 for (int i = 0; i < recipients_count; i++)
5510 debug_printf(" %s\n", recipients_list[i].address);
5514 /* Run the acl_not_smtp_start ACL if required. The result of the ACL is
5515 ignored; rejecting here would just add complication, and it can just as
5516 well be done later. Allow $recipients to be visible in the ACL. */
5518 if (acl_not_smtp_start)
5520 uschar *user_msg, *log_msg;
5521 f.enable_dollar_recipients = TRUE;
5522 (void)acl_check(ACL_WHERE_NOTSMTP_START, NULL, acl_not_smtp_start,
5523 &user_msg, &log_msg);
5524 f.enable_dollar_recipients = FALSE;
5527 /* Pause for a while waiting for input. If none received in that time,
5528 close the logfile, if we had one open; then if we wait for a long-running
5529 datasource (months, in one use-case) log rotation will not leave us holding
5532 if (!receive_timeout)
5534 struct timeval t = { .tv_sec = 30*60, .tv_usec = 0 }; /* 30 minutes */
5537 FD_ZERO(&r); FD_SET(0, &r);
5538 if (select(1, &r, NULL, NULL, &t) == 0) mainlog_close();
5541 /* Read the data for the message. If filter_test is not FTEST_NONE, this
5542 will just read the headers for the message, and not write anything onto the
5545 message_ended = END_NOTENDED;
5546 more = receive_msg(extract_recipients);
5548 /* more is always FALSE here (not SMTP message) when reading a message
5549 for real; when reading the headers of a message for filter testing,
5550 it is TRUE if the headers were terminated by '.' and FALSE otherwise. */
5552 if (message_id[0] == 0) exim_exit(EXIT_FAILURE, US"main");
5553 } /* Non-SMTP message reception */
5555 /* If this is a filter testing run, there are headers in store, but
5556 no message on the spool. Run the filtering code in testing mode, setting
5557 the domain to the qualify domain and the local part to the current user,
5558 unless they have been set by options. The prefix and suffix are left unset
5559 unless specified. The the return path is set to to the sender unless it has
5560 already been set from a return-path header in the message. */
5562 if (filter_test != FTEST_NONE)
5564 deliver_domain = (ftest_domain != NULL)?
5565 ftest_domain : qualify_domain_recipient;
5566 deliver_domain_orig = deliver_domain;
5567 deliver_localpart = (ftest_localpart != NULL)?
5568 ftest_localpart : originator_login;
5569 deliver_localpart_orig = deliver_localpart;
5570 deliver_localpart_prefix = ftest_prefix;
5571 deliver_localpart_suffix = ftest_suffix;
5572 deliver_home = originator_home;
5574 if (return_path == NULL)
5576 printf("Return-path copied from sender\n");
5577 return_path = string_copy(sender_address);
5580 printf("Return-path = %s\n", (return_path[0] == 0)? US"<>" : return_path);
5581 printf("Sender = %s\n", (sender_address[0] == 0)? US"<>" : sender_address);
5583 receive_add_recipient(
5584 string_sprintf("%s%s%s@%s",
5585 (ftest_prefix == NULL)? US"" : ftest_prefix,
5587 (ftest_suffix == NULL)? US"" : ftest_suffix,
5588 deliver_domain), -1);
5590 printf("Recipient = %s\n", recipients_list[0].address);
5591 if (ftest_prefix != NULL) printf("Prefix = %s\n", ftest_prefix);
5592 if (ftest_suffix != NULL) printf("Suffix = %s\n", ftest_suffix);
5594 if (chdir("/")) /* Get away from wherever the user is running this from */
5596 DEBUG(D_receive) debug_printf("chdir(\"/\") failed\n");
5597 exim_exit(EXIT_FAILURE, US"main");
5600 /* Now we run either a system filter test, or a user filter test, or both.
5601 In the latter case, headers added by the system filter will persist and be
5602 available to the user filter. We need to copy the filter variables
5605 if ((filter_test & FTEST_SYSTEM) != 0)
5606 if (!filter_runtest(filter_sfd, filter_test_sfile, TRUE, more))
5607 exim_exit(EXIT_FAILURE, US"main");
5609 memcpy(filter_sn, filter_n, sizeof(filter_sn));
5611 if ((filter_test & FTEST_USER) != 0)
5612 if (!filter_runtest(filter_ufd, filter_test_ufile, FALSE, more))
5613 exim_exit(EXIT_FAILURE, US"main");
5615 exim_exit(EXIT_SUCCESS, US"main");
5618 /* Else act on the result of message reception. We should not get here unless
5619 message_id[0] is non-zero. If queue_only is set, session_local_queue_only
5620 will be TRUE. If it is not, check on the number of messages received in this
5623 if (!session_local_queue_only &&
5624 smtp_accept_queue_per_connection > 0 &&
5625 receive_messagecount > smtp_accept_queue_per_connection)
5627 session_local_queue_only = TRUE;
5628 queue_only_reason = 2;
5631 /* Initialize local_queue_only from session_local_queue_only. If it is false,
5632 and queue_only_load is set, check that the load average is below it. If it is
5633 not, set local_queue_only TRUE. If queue_only_load_latch is true (the
5634 default), we put the whole session into queue_only mode. It then remains this
5635 way for any subsequent messages on the same SMTP connection. This is a
5636 deliberate choice; even though the load average may fall, it doesn't seem
5637 right to deliver later messages on the same call when not delivering earlier
5638 ones. However, there are odd cases where this is not wanted, so this can be
5639 changed by setting queue_only_load_latch false. */
5641 local_queue_only = session_local_queue_only;
5642 if (!local_queue_only && queue_only_load >= 0)
5644 local_queue_only = (load_average = OS_GETLOADAVG()) > queue_only_load;
5645 if (local_queue_only)
5647 queue_only_reason = 3;
5648 if (queue_only_load_latch) session_local_queue_only = TRUE;
5652 /* If running as an MUA wrapper, all queueing options and freezing options
5656 local_queue_only = f.queue_only_policy = f.deliver_freeze = FALSE;
5658 /* Log the queueing here, when it will get a message id attached, but
5659 not if queue_only is set (case 0). Case 1 doesn't happen here (too many
5662 if (local_queue_only)
5664 cancel_cutthrough_connection(TRUE, US"no delivery; queueing");
5665 switch(queue_only_reason)
5668 log_write(L_delay_delivery,
5669 LOG_MAIN, "no immediate delivery: more than %d messages "
5670 "received in one connection", smtp_accept_queue_per_connection);
5674 log_write(L_delay_delivery,
5675 LOG_MAIN, "no immediate delivery: load average %.2f",
5676 (double)load_average/1000.0);
5681 else if (f.queue_only_policy || f.deliver_freeze)
5682 cancel_cutthrough_connection(TRUE, US"no delivery; queueing");
5684 /* Else do the delivery unless the ACL or local_scan() called for queue only
5685 or froze the message. Always deliver in a separate process. A fork failure is
5686 not a disaster, as the delivery will eventually happen on a subsequent queue
5687 run. The search cache must be tidied before the fork, as the parent will
5688 do it before exiting. The child will trigger a lookup failure and
5689 thereby defer the delivery if it tries to use (for example) a cached ldap
5690 connection that the parent has called unbind on. */
5697 if ((pid = fork()) == 0)
5700 close_unwanted(); /* Close unwanted file descriptors and TLS */
5701 exim_nullstd(); /* Ensure std{in,out,err} exist */
5703 /* Re-exec Exim if we need to regain privilege (note: in mua_wrapper
5704 mode, deliver_drop_privilege is forced TRUE). */
5706 if (geteuid() != root_uid && !deliver_drop_privilege && !unprivileged)
5708 delivery_re_exec(CEE_EXEC_EXIT);
5709 /* Control does not return here. */
5712 /* No need to re-exec */
5714 rc = deliver_message(message_id, FALSE, FALSE);
5716 exim_underbar_exit(!mua_wrapper || rc == DELIVER_MUA_SUCCEEDED
5717 ? EXIT_SUCCESS : EXIT_FAILURE, US"cmdline-delivery");
5722 cancel_cutthrough_connection(TRUE, US"delivery fork failed");
5723 log_write(0, LOG_MAIN|LOG_PANIC, "failed to fork automatic delivery "
5724 "process: %s", strerror(errno));
5728 release_cutthrough_connection(US"msg passed for delivery");
5730 /* In the parent, wait if synchronous delivery is required. This will
5731 always be the case in MUA wrapper mode. */
5733 if (f.synchronous_delivery)
5736 while (wait(&status) != pid);
5737 if ((status & 0x00ff) != 0)
5738 log_write(0, LOG_MAIN|LOG_PANIC,
5739 "process %d crashed with signal %d while delivering %s",
5740 (int)pid, status & 0x00ff, message_id);
5741 if (mua_wrapper && (status & 0xffff) != 0) exim_exit(EXIT_FAILURE, US"main");
5746 /* The loop will repeat if more is TRUE. If we do not know know that the OS
5747 automatically reaps children (see comments above the loop), clear away any
5748 finished subprocesses here, in case there are lots of messages coming in
5749 from the same source. */
5751 #ifndef SIG_IGN_WORKS
5752 while (waitpid(-1, NULL, WNOHANG) > 0);
5756 return_path = sender_address = NULL;
5757 authenticated_sender = NULL;
5758 deliver_localpart_orig = NULL;
5759 deliver_domain_orig = NULL;
5760 deliver_host = deliver_host_address = NULL;
5761 dnslist_domain = dnslist_matched = NULL;
5762 #ifdef WITH_CONTENT_SCAN
5763 malware_name = NULL;
5765 callout_address = NULL;
5766 sending_ip_address = NULL;
5768 for(int i = 0; i < REGEX_VARS; i++) regex_vars[i] = NULL;
5770 store_reset(reset_point);
5773 exim_exit(EXIT_SUCCESS, US"main"); /* Never returns */
5774 return 0; /* To stop compiler warning */