1 /*************************************************
2 * Exim - an Internet mail transport agent *
3 *************************************************/
5 /* Copyright (c) University of Cambridge 1995 - 2018 */
6 /* Copyright (c) The Exim Maintainers 2020 */
7 /* See the file NOTICE for conditions of use and distribution. */
10 /* The main function: entry point, initialization, and high-level control.
11 Also a few functions that don't naturally fit elsewhere. */
16 #if defined(__GLIBC__) && !defined(__UCLIBC__)
17 # include <gnu/libc-version.h>
21 # include <gnutls/gnutls.h>
22 # if GNUTLS_VERSION_NUMBER < 0x030103 && !defined(DISABLE_OCSP)
31 extern void init_lookup_list(void);
35 /*************************************************
36 * Function interface to store functions *
37 *************************************************/
39 /* We need some real functions to pass to the PCRE regular expression library
40 for store allocation via Exim's store manager. The normal calls are actually
41 macros that pass over location information to make tracing easier. These
42 functions just interface to the standard macro calls. A good compiler will
43 optimize out the tail recursion and so not make them too expensive. There
44 are two sets of functions; one for use when we want to retain the compiled
45 regular expression for a long time; the other for short-term use. */
48 function_store_get(size_t size)
50 /* For now, regard all RE results as potentially tainted. We might need
51 more intelligence on this point. */
52 return store_get((int)size, TRUE);
56 function_dummy_free(void *block) { block = block; }
59 function_store_malloc(size_t size)
61 return store_malloc((int)size);
65 function_store_free(void *block)
73 /*************************************************
74 * Enums for cmdline interface *
75 *************************************************/
77 enum commandline_info { CMDINFO_NONE=0,
78 CMDINFO_HELP, CMDINFO_SIEVE, CMDINFO_DSCP };
83 /*************************************************
84 * Compile regular expression and panic on fail *
85 *************************************************/
87 /* This function is called when failure to compile a regular expression leads
88 to a panic exit. In other cases, pcre_compile() is called directly. In many
89 cases where this function is used, the results of the compilation are to be
90 placed in long-lived store, so we temporarily reset the store management
91 functions that PCRE uses if the use_malloc flag is set.
94 pattern the pattern to compile
95 caseless TRUE if caseless matching is required
96 use_malloc TRUE if compile into malloc store
98 Returns: pointer to the compiled pattern
102 regex_must_compile(const uschar *pattern, BOOL caseless, BOOL use_malloc)
105 int options = PCRE_COPT;
110 pcre_malloc = function_store_malloc;
111 pcre_free = function_store_free;
113 if (caseless) options |= PCRE_CASELESS;
114 yield = pcre_compile(CCS pattern, options, CCSS &error, &offset, NULL);
115 pcre_malloc = function_store_get;
116 pcre_free = function_dummy_free;
118 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "regular expression error: "
119 "%s at offset %d while compiling %s", error, offset, pattern);
126 /*************************************************
127 * Execute regular expression and set strings *
128 *************************************************/
130 /* This function runs a regular expression match, and sets up the pointers to
131 the matched substrings.
134 re the compiled expression
135 subject the subject string
136 options additional PCRE options
137 setup if < 0 do full setup
138 if >= 0 setup from setup+1 onwards,
139 excluding the full matched string
141 Returns: TRUE or FALSE
145 regex_match_and_setup(const pcre *re, const uschar *subject, int options, int setup)
147 int ovector[3*(EXPAND_MAXN+1)];
148 uschar * s = string_copy(subject); /* de-constifying */
149 int n = pcre_exec(re, NULL, CS s, Ustrlen(s), 0,
150 PCRE_EOPT | options, ovector, nelem(ovector));
152 if (n == 0) n = EXPAND_MAXN + 1;
155 expand_nmax = setup < 0 ? 0 : setup + 1;
156 for (int nn = setup < 0 ? 0 : 2; nn < n*2; nn += 2)
158 expand_nstring[expand_nmax] = s + ovector[nn];
159 expand_nlength[expand_nmax++] = ovector[nn+1] - ovector[nn];
169 /*************************************************
170 * Set up processing details *
171 *************************************************/
173 /* Save a text string for dumping when SIGUSR1 is received.
174 Do checks for overruns.
176 Arguments: format and arguments, as for printf()
181 set_process_info(const char *format, ...)
183 gstring gs = { .size = PROCESS_INFO_SIZE - 2, .ptr = 0, .s = process_info };
188 g = string_fmt_append(&gs, "%5d ", (int)getpid());
190 va_start(ap, format);
191 if (!string_vformat(g, 0, format, ap))
194 g = string_cat(&gs, US"**** string overflowed buffer ****");
196 g = string_catn(g, US"\n", 1);
197 string_from_gstring(g);
198 process_info_len = g->ptr;
199 DEBUG(D_process_info) debug_printf("set_process_info: %s", process_info);
203 /***********************************************
204 * Handler for SIGTERM *
205 ***********************************************/
208 term_handler(int sig)
214 /*************************************************
215 * Handler for SIGUSR1 *
216 *************************************************/
218 /* SIGUSR1 causes any exim process to write to the process log details of
219 what it is currently doing. It will only be used if the OS is capable of
220 setting up a handler that causes automatic restarting of any system call
221 that is in progress at the time.
223 This function takes care to be signal-safe.
225 Argument: the signal number (SIGUSR1)
230 usr1_handler(int sig)
234 os_restarting_signal(sig, usr1_handler);
236 if ((fd = Uopen(process_log_path, O_APPEND|O_WRONLY, LOG_MODE)) < 0)
238 /* If we are already running as the Exim user, try to create it in the
239 current process (assuming spool_directory exists). Otherwise, if we are
240 root, do the creation in an exim:exim subprocess. */
242 int euid = geteuid();
243 if (euid == exim_uid)
244 fd = Uopen(process_log_path, O_CREAT|O_APPEND|O_WRONLY, LOG_MODE);
245 else if (euid == root_uid)
246 fd = log_create_as_exim(process_log_path);
249 /* If we are neither exim nor root, or if we failed to create the log file,
250 give up. There is not much useful we can do with errors, since we don't want
251 to disrupt whatever is going on outside the signal handler. */
255 (void)write(fd, process_info, process_info_len);
261 /*************************************************
263 *************************************************/
265 /* This handler is enabled most of the time that Exim is running. The handler
266 doesn't actually get used unless alarm() has been called to set a timer, to
267 place a time limit on a system call of some kind. When the handler is run, it
270 There are some other SIGALRM handlers that are used in special cases when more
271 than just a flag setting is required; for example, when reading a message's
272 input. These are normally set up in the code module that uses them, and the
273 SIGALRM handler is reset to this one afterwards.
275 Argument: the signal value (SIGALRM)
280 sigalrm_handler(int sig)
282 sig = sig; /* Keep picky compilers happy */
284 os_non_restarting_signal(SIGALRM, sigalrm_handler);
289 /*************************************************
290 * Sleep for a fractional time interval *
291 *************************************************/
293 /* This function is called by millisleep() and exim_wait_tick() to wait for a
294 period of time that may include a fraction of a second. The coding is somewhat
295 tedious. We do not expect setitimer() ever to fail, but if it does, the process
296 will wait for ever, so we panic in this instance. (There was a case of this
297 when a bug in a function that calls milliwait() caused it to pass invalid data.
298 That's when I added the check. :-)
300 We assume it to be not worth sleeping for under 50us; this value will
301 require revisiting as hardware advances. This avoids the issue of
302 a zero-valued timer setting meaning "never fire".
304 Argument: an itimerval structure containing the interval
309 milliwait(struct itimerval *itval)
312 sigset_t old_sigmask;
313 int save_errno = errno;
315 if (itval->it_value.tv_usec < 50 && itval->it_value.tv_sec == 0)
317 (void)sigemptyset(&sigmask); /* Empty mask */
318 (void)sigaddset(&sigmask, SIGALRM); /* Add SIGALRM */
319 (void)sigprocmask(SIG_BLOCK, &sigmask, &old_sigmask); /* Block SIGALRM */
320 if (setitimer(ITIMER_REAL, itval, NULL) < 0) /* Start timer */
321 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
322 "setitimer() failed: %s", strerror(errno));
323 (void)sigfillset(&sigmask); /* All signals */
324 (void)sigdelset(&sigmask, SIGALRM); /* Remove SIGALRM */
325 (void)sigsuspend(&sigmask); /* Until SIGALRM */
326 (void)sigprocmask(SIG_SETMASK, &old_sigmask, NULL); /* Restore mask */
328 sigalrm_seen = FALSE;
334 /*************************************************
335 * Millisecond sleep function *
336 *************************************************/
338 /* The basic sleep() function has a granularity of 1 second, which is too rough
339 in some cases - for example, when using an increasing delay to slow down
342 Argument: number of millseconds
349 struct itimerval itval = {.it_interval = {.tv_sec = 0, .tv_usec = 0},
350 .it_value = {.tv_sec = msec/1000,
351 .tv_usec = (msec % 1000) * 1000}};
357 /*************************************************
358 * Compare microsecond times *
359 *************************************************/
366 Returns: -1, 0, or +1
370 exim_tvcmp(struct timeval *t1, struct timeval *t2)
372 if (t1->tv_sec > t2->tv_sec) return +1;
373 if (t1->tv_sec < t2->tv_sec) return -1;
374 if (t1->tv_usec > t2->tv_usec) return +1;
375 if (t1->tv_usec < t2->tv_usec) return -1;
382 /*************************************************
383 * Clock tick wait function *
384 *************************************************/
386 #ifdef _POSIX_MONOTONIC_CLOCK
387 /* Amount CLOCK_MONOTONIC is behind realtime, at startup. */
388 static struct timespec offset_ts;
391 exim_clock_init(void)
394 if (clock_gettime(CLOCK_MONOTONIC, &offset_ts) != 0) return;
395 (void)gettimeofday(&tv, NULL);
396 offset_ts.tv_sec = tv.tv_sec - offset_ts.tv_sec;
397 offset_ts.tv_nsec = tv.tv_usec * 1000 - offset_ts.tv_nsec;
398 if (offset_ts.tv_nsec >= 0) return;
400 offset_ts.tv_nsec += 1000*1000*1000;
405 /* Exim uses a time + a pid to generate a unique identifier in two places: its
406 message IDs, and in file names for maildir deliveries. Because some OS now
407 re-use pids within the same second, sub-second times are now being used.
408 However, for absolute certainty, we must ensure the clock has ticked before
409 allowing the relevant process to complete. At the time of implementation of
410 this code (February 2003), the speed of processors is such that the clock will
411 invariably have ticked already by the time a process has done its job. This
412 function prepares for the time when things are faster - and it also copes with
413 clocks that go backwards.
416 tgt_tv A timeval which was used to create uniqueness; its usec field
417 has been rounded down to the value of the resolution.
418 We want to be sure the current time is greater than this.
419 resolution The resolution that was used to divide the microseconds
420 (1 for maildir, larger for message ids)
426 exim_wait_tick(struct timeval * tgt_tv, int resolution)
428 struct timeval now_tv;
429 long int now_true_usec;
431 #ifdef _POSIX_MONOTONIC_CLOCK
432 struct timespec now_ts;
434 if (clock_gettime(CLOCK_MONOTONIC, &now_ts) == 0)
436 now_ts.tv_sec += offset_ts.tv_sec;
437 if ((now_ts.tv_nsec += offset_ts.tv_nsec) >= 1000*1000*1000)
440 now_ts.tv_nsec -= 1000*1000*1000;
442 now_tv.tv_sec = now_ts.tv_sec;
443 now_true_usec = (now_ts.tv_nsec / (resolution * 1000)) * resolution;
444 now_tv.tv_usec = now_true_usec;
449 (void)gettimeofday(&now_tv, NULL);
450 now_true_usec = now_tv.tv_usec;
451 now_tv.tv_usec = (now_true_usec/resolution) * resolution;
454 while (exim_tvcmp(&now_tv, tgt_tv) <= 0)
456 struct itimerval itval;
457 itval.it_interval.tv_sec = 0;
458 itval.it_interval.tv_usec = 0;
459 itval.it_value.tv_sec = tgt_tv->tv_sec - now_tv.tv_sec;
460 itval.it_value.tv_usec = tgt_tv->tv_usec + resolution - now_true_usec;
462 /* We know that, overall, "now" is less than or equal to "then". Therefore, a
463 negative value for the microseconds is possible only in the case when "now"
464 is more than a second less than "tgt". That means that itval.it_value.tv_sec
465 is greater than zero. The following correction is therefore safe. */
467 if (itval.it_value.tv_usec < 0)
469 itval.it_value.tv_usec += 1000000;
470 itval.it_value.tv_sec -= 1;
473 DEBUG(D_transport|D_receive)
475 if (!f.running_in_test_harness)
477 debug_printf("tick check: " TIME_T_FMT ".%06lu " TIME_T_FMT ".%06lu\n",
478 tgt_tv->tv_sec, (long) tgt_tv->tv_usec,
479 now_tv.tv_sec, (long) now_tv.tv_usec);
480 debug_printf("waiting " TIME_T_FMT ".%06lu sec\n",
481 itval.it_value.tv_sec, (long) itval.it_value.tv_usec);
487 /* Be prapared to go around if the kernel does not implement subtick
488 granularity (GNU Hurd) */
490 (void)gettimeofday(&now_tv, NULL);
491 now_true_usec = now_tv.tv_usec;
492 now_tv.tv_usec = (now_true_usec/resolution) * resolution;
499 /*************************************************
500 * Call fopen() with umask 777 and adjust mode *
501 *************************************************/
503 /* Exim runs with umask(0) so that files created with open() have the mode that
504 is specified in the open() call. However, there are some files, typically in
505 the spool directory, that are created with fopen(). They end up world-writeable
506 if no precautions are taken. Although the spool directory is not accessible to
507 the world, this is an untidiness. So this is a wrapper function for fopen()
508 that sorts out the mode of the created file.
511 filename the file name
512 options the fopen() options
513 mode the required mode
515 Returns: the fopened FILE or NULL
519 modefopen(const uschar *filename, const char *options, mode_t mode)
521 mode_t saved_umask = umask(0777);
522 FILE *f = Ufopen(filename, options);
523 (void)umask(saved_umask);
524 if (f != NULL) (void)fchmod(fileno(f), mode);
529 /*************************************************
530 * Ensure stdin, stdout, and stderr exist *
531 *************************************************/
533 /* Some operating systems grumble if an exec() happens without a standard
534 input, output, and error (fds 0, 1, 2) being defined. The worry is that some
535 file will be opened and will use these fd values, and then some other bit of
536 code will assume, for example, that it can write error messages to stderr.
537 This function ensures that fds 0, 1, and 2 are open if they do not already
538 exist, by connecting them to /dev/null.
540 This function is also used to ensure that std{in,out,err} exist at all times,
541 so that if any library that Exim calls tries to use them, it doesn't crash.
552 for (int i = 0; i <= 2; i++)
554 if (fstat(i, &statbuf) < 0 && errno == EBADF)
556 if (devnull < 0) devnull = open("/dev/null", O_RDWR);
557 if (devnull < 0) log_write(0, LOG_MAIN|LOG_PANIC_DIE, "%s",
558 string_open_failed(errno, "/dev/null", NULL));
559 if (devnull != i) (void)dup2(devnull, i);
562 if (devnull > 2) (void)close(devnull);
568 /*************************************************
569 * Close unwanted file descriptors for delivery *
570 *************************************************/
572 /* This function is called from a new process that has been forked to deliver
573 an incoming message, either directly, or using exec.
575 We want any smtp input streams to be closed in this new process. However, it
576 has been observed that using fclose() here causes trouble. When reading in -bS
577 input, duplicate copies of messages have been seen. The files will be sharing a
578 file pointer with the parent process, and it seems that fclose() (at least on
579 some systems - I saw this on Solaris 2.5.1) messes with that file pointer, at
580 least sometimes. Hence we go for closing the underlying file descriptors.
582 If TLS is active, we want to shut down the TLS library, but without molesting
583 the parent's SSL connection.
585 For delivery of a non-SMTP message, we want to close stdin and stdout (and
586 stderr unless debugging) because the calling process might have set them up as
587 pipes and be waiting for them to close before it waits for the submission
588 process to terminate. If they aren't closed, they hold up the calling process
589 until the initial delivery process finishes, which is not what we want.
591 Exception: We do want it for synchronous delivery!
593 And notwithstanding all the above, if D_resolver is set, implying resolver
594 debugging, leave stdout open, because that's where the resolver writes its
597 When we close stderr (which implies we've also closed stdout), we also get rid
598 of any controlling terminal.
610 tls_close(NULL, TLS_NO_SHUTDOWN); /* Shut down the TLS library */
612 (void)close(fileno(smtp_in));
613 (void)close(fileno(smtp_out));
618 (void)close(0); /* stdin */
619 if ((debug_selector & D_resolver) == 0) (void)close(1); /* stdout */
620 if (debug_selector == 0) /* stderr */
622 if (!f.synchronous_delivery)
635 /*************************************************
637 *************************************************/
639 /* This function sets a new uid and gid permanently, optionally calling
640 initgroups() to set auxiliary groups. There are some special cases when running
641 Exim in unprivileged modes. In these situations the effective uid will not be
642 root; if we already have the right effective uid/gid, and don't need to
643 initialize any groups, leave things as they are.
648 igflag TRUE if initgroups() wanted
649 msg text to use in debugging output and failure log
651 Returns: nothing; bombs out on failure
655 exim_setugid(uid_t uid, gid_t gid, BOOL igflag, uschar *msg)
657 uid_t euid = geteuid();
658 gid_t egid = getegid();
660 if (euid == root_uid || euid != uid || egid != gid || igflag)
662 /* At least one OS returns +1 for initgroups failure, so just check for
667 struct passwd *pw = getpwuid(uid);
669 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "cannot run initgroups(): "
670 "no passwd entry for uid=%ld", (long int)uid);
672 if (initgroups(pw->pw_name, gid) != 0)
673 log_write(0,LOG_MAIN|LOG_PANIC_DIE,"initgroups failed for uid=%ld: %s",
674 (long int)uid, strerror(errno));
677 if (setgid(gid) < 0 || setuid(uid) < 0)
678 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "unable to set gid=%ld or uid=%ld "
679 "(euid=%ld): %s", (long int)gid, (long int)uid, (long int)euid, msg);
682 /* Debugging output included uid/gid and all groups */
686 int group_count, save_errno;
687 gid_t group_list[EXIM_GROUPLIST_SIZE];
688 debug_printf("changed uid/gid: %s\n uid=%ld gid=%ld pid=%ld\n", msg,
689 (long int)geteuid(), (long int)getegid(), (long int)getpid());
690 group_count = getgroups(nelem(group_list), group_list);
692 debug_printf(" auxiliary group list:");
694 for (int i = 0; i < group_count; i++) debug_printf(" %d", (int)group_list[i]);
695 else if (group_count < 0)
696 debug_printf(" <error: %s>", strerror(save_errno));
697 else debug_printf(" <none>");
705 /*************************************************
707 *************************************************/
709 /* Exim exits via this function so that it always clears up any open
715 Returns: does not return
724 debug_printf(">>>>>>>>>>>>>>>> Exim pid=%d (%s) terminating with rc=%d "
725 ">>>>>>>>>>>>>>>>\n",
726 (int)getpid(), process_purpose, rc);
732 exim_underbar_exit(int rc)
736 debug_printf(">>>>>>>>>>>>>>>> Exim pid=%d (%s) terminating with rc=%d "
737 ">>>>>>>>>>>>>>>>\n",
738 (int)getpid(), process_purpose, rc);
744 /* Print error string, then die */
746 exim_fail(const char * fmt, ...)
750 vfprintf(stderr, fmt, ap);
754 /* exim_chown_failure() called from exim_chown()/exim_fchown() on failure
755 of chown()/fchown(). See src/functions.h for more explanation */
757 exim_chown_failure(int fd, const uschar *name, uid_t owner, gid_t group)
759 int saved_errno = errno; /* from the preceeding chown call */
761 log_write(0, LOG_MAIN|LOG_PANIC,
762 __FILE__ ":%d: chown(%s, %d:%d) failed (%s)."
763 " Please contact the authors and refer to https://bugs.exim.org/show_bug.cgi?id=2391",
764 __LINE__, name?name:US"<unknown>", owner, group, strerror(errno));
766 /* I leave this here, commented, in case the "bug"(?) comes up again.
767 It is not an Exim bug, but we can provide a workaround.
773 if (0 == (fd < 0 ? stat(name, &buf) : fstat(fd, &buf)))
775 if (buf.st_uid == owner && buf.st_gid == group) return 0;
776 log_write(0, LOG_MAIN|LOG_PANIC, "Wrong ownership on %s", name);
778 else log_write(0, LOG_MAIN|LOG_PANIC, "Stat failed on %s: %s", name, strerror(errno));
786 /*************************************************
787 * Extract port from host address *
788 *************************************************/
790 /* Called to extract the port from the values given to -oMa and -oMi.
791 It also checks the syntax of the address, and terminates it before the
792 port data when a port is extracted.
795 address the address, with possible port on the end
797 Returns: the port, or zero if there isn't one
798 bombs out on a syntax error
802 check_port(uschar *address)
804 int port = host_address_extract_port(address);
805 if (string_is_ip_address(address, NULL) == 0)
806 exim_fail("exim abandoned: \"%s\" is not an IP address\n", address);
812 /*************************************************
813 * Test/verify an address *
814 *************************************************/
816 /* This function is called by the -bv and -bt code. It extracts a working
817 address from a full RFC 822 address. This isn't really necessary per se, but it
818 has the effect of collapsing source routes.
822 flags flag bits for verify_address()
823 exit_value to be set for failures
829 test_address(uschar *s, int flags, int *exit_value)
831 int start, end, domain;
832 uschar *parse_error = NULL;
833 uschar *address = parse_extract_address(s, &parse_error, &start, &end, &domain,
837 fprintf(stdout, "syntax error: %s\n", parse_error);
842 int rc = verify_address(deliver_make_addr(address,TRUE), stdout, flags, -1,
843 -1, -1, NULL, NULL, NULL);
844 if (rc == FAIL) *exit_value = 2;
845 else if (rc == DEFER && *exit_value == 0) *exit_value = 1;
851 /*************************************************
852 * Show supported features *
853 *************************************************/
856 show_db_version(FILE * f)
858 #ifdef DB_VERSION_STRING
861 fprintf(f, "Library version: BDB: Compile: %s\n", DB_VERSION_STRING);
862 fprintf(f, " Runtime: %s\n",
863 db_version(NULL, NULL, NULL));
866 fprintf(f, "Berkeley DB: %s\n", DB_VERSION_STRING);
868 #elif defined(BTREEVERSION) && defined(HASHVERSION)
870 fprintf(f, "Probably Berkeley DB version 1.8x (native mode)\n");
872 fprintf(f, "Probably Berkeley DB version 1.8x (compatibility mode)\n");
875 #elif defined(_DBM_RDONLY) || defined(dbm_dirfno)
876 fprintf(f, "Probably ndbm\n");
877 #elif defined(USE_TDB)
878 fprintf(f, "Using tdb\n");
881 fprintf(f, "Probably GDBM (native mode)\n");
883 fprintf(f, "Probably GDBM (compatibility mode)\n");
889 /* This function is called for -bV/--version and for -d to output the optional
890 features of the current Exim binary.
892 Arguments: a FILE for printing
897 show_whats_supported(FILE * fp)
899 rmark reset_point = store_mark();
901 DEBUG(D_any) {} else show_db_version(fp);
903 g = string_cat(NULL, US"Support for:");
904 #ifdef SUPPORT_CRYPTEQ
905 g = string_cat(g, US" crypteq");
908 g = string_cat(g, US" iconv()");
911 g = string_cat(g, US" IPv6");
913 #ifdef HAVE_SETCLASSRESOURCES
914 g = string_cat(g, US" use_setclassresources");
917 g = string_cat(g, US" PAM");
920 g = string_cat(g, US" Perl");
923 g = string_cat(g, US" Expand_dlfunc");
925 #ifdef USE_TCP_WRAPPERS
926 g = string_cat(g, US" TCPwrappers");
929 g = string_cat(g, US" GnuTLS");
932 g = string_cat(g, US" OpenSSL");
934 #ifdef SUPPORT_TRANSLATE_IP_ADDRESS
935 g = string_cat(g, US" translate_ip_address");
937 #ifdef SUPPORT_MOVE_FROZEN_MESSAGES
938 g = string_cat(g, US" move_frozen_messages");
940 #ifdef WITH_CONTENT_SCAN
941 g = string_cat(g, US" Content_Scanning");
944 g = string_cat(g, US" DANE");
947 g = string_cat(g, US" DKIM");
950 g = string_cat(g, US" DMARC");
952 #ifndef DISABLE_DNSSEC
953 g = string_cat(g, US" DNSSEC");
955 #ifndef DISABLE_EVENT
956 g = string_cat(g, US" Event");
959 g = string_cat(g, US" I18N");
962 g = string_cat(g, US" OCSP");
964 #ifndef DISABLE_PIPE_CONNECT
965 g = string_cat(g, US" PIPE_CONNECT");
968 g = string_cat(g, US" PRDR");
971 g = string_cat(g, US" PROXY");
973 #ifndef DISABLE_QUEUE_RAMP
974 g = string_cat(g, US" Experimental_Queue_Ramp");
977 g = string_cat(g, US" SOCKS");
980 g = string_cat(g, US" SPF");
982 #if defined(SUPPORT_SRS)
983 g = string_cat(g, US" SRS");
987 if (f.tcp_fastopen_ok) g = string_cat(g, US" TCP_Fast_Open");
989 #ifdef EXPERIMENTAL_ARC
990 g = string_cat(g, US" Experimental_ARC");
992 #ifdef EXPERIMENTAL_BRIGHTMAIL
993 g = string_cat(g, US" Experimental_Brightmail");
995 #ifdef EXPERIMENTAL_DCC
996 g = string_cat(g, US" Experimental_DCC");
998 #ifdef EXPERIMENTAL_DSN_INFO
999 g = string_cat(g, US" Experimental_DSN_info");
1001 #ifdef EXPERIMENTAL_LMDB
1002 g = string_cat(g, US" Experimental_LMDB");
1004 #ifdef EXPERIMENTAL_QUEUEFILE
1005 g = string_cat(g, US" Experimental_QUEUEFILE");
1007 #if defined(EXPERIMENTAL_SRS_ALT)
1008 g = string_cat(g, US" Experimental_SRS");
1010 #ifdef EXPERIMENTAL_TLS_RESUME
1011 g = string_cat(g, US" Experimental_TLS_resume");
1013 g = string_cat(g, US"\n");
1015 g = string_cat(g, US"Lookups (built-in):");
1016 #if defined(LOOKUP_LSEARCH) && LOOKUP_LSEARCH!=2
1017 g = string_cat(g, US" lsearch wildlsearch nwildlsearch iplsearch");
1019 #if defined(LOOKUP_CDB) && LOOKUP_CDB!=2
1020 g = string_cat(g, US" cdb");
1022 #if defined(LOOKUP_DBM) && LOOKUP_DBM!=2
1023 g = string_cat(g, US" dbm dbmjz dbmnz");
1025 #if defined(LOOKUP_DNSDB) && LOOKUP_DNSDB!=2
1026 g = string_cat(g, US" dnsdb");
1028 #if defined(LOOKUP_DSEARCH) && LOOKUP_DSEARCH!=2
1029 g = string_cat(g, US" dsearch");
1031 #if defined(LOOKUP_IBASE) && LOOKUP_IBASE!=2
1032 g = string_cat(g, US" ibase");
1034 #if defined(LOOKUP_JSON) && LOOKUP_JSON!=2
1035 g = string_cat(g, US" json");
1037 #if defined(LOOKUP_LDAP) && LOOKUP_LDAP!=2
1038 g = string_cat(g, US" ldap ldapdn ldapm");
1040 #ifdef EXPERIMENTAL_LMDB
1041 g = string_cat(g, US" lmdb");
1043 #if defined(LOOKUP_MYSQL) && LOOKUP_MYSQL!=2
1044 g = string_cat(g, US" mysql");
1046 #if defined(LOOKUP_NIS) && LOOKUP_NIS!=2
1047 g = string_cat(g, US" nis nis0");
1049 #if defined(LOOKUP_NISPLUS) && LOOKUP_NISPLUS!=2
1050 g = string_cat(g, US" nisplus");
1052 #if defined(LOOKUP_ORACLE) && LOOKUP_ORACLE!=2
1053 g = string_cat(g, US" oracle");
1055 #if defined(LOOKUP_PASSWD) && LOOKUP_PASSWD!=2
1056 g = string_cat(g, US" passwd");
1058 #if defined(LOOKUP_PGSQL) && LOOKUP_PGSQL!=2
1059 g = string_cat(g, US" pgsql");
1061 #if defined(LOOKUP_REDIS) && LOOKUP_REDIS!=2
1062 g = string_cat(g, US" redis");
1064 #if defined(LOOKUP_SQLITE) && LOOKUP_SQLITE!=2
1065 g = string_cat(g, US" sqlite");
1067 #if defined(LOOKUP_TESTDB) && LOOKUP_TESTDB!=2
1068 g = string_cat(g, US" testdb");
1070 #if defined(LOOKUP_WHOSON) && LOOKUP_WHOSON!=2
1071 g = string_cat(g, US" whoson");
1073 g = string_cat(g, US"\n");
1075 g = auth_show_supported(g);
1076 g = route_show_supported(g);
1077 g = transport_show_supported(g);
1079 #ifdef WITH_CONTENT_SCAN
1080 g = malware_show_supported(g);
1083 if (fixed_never_users[0] > 0)
1086 g = string_cat(g, US"Fixed never_users: ");
1087 for (i = 1; i <= (int)fixed_never_users[0] - 1; i++)
1088 string_fmt_append(g, "%u:", (unsigned)fixed_never_users[i]);
1089 g = string_fmt_append(g, "%u\n", (unsigned)fixed_never_users[i]);
1092 g = string_fmt_append(g, "Configure owner: %d:%d\n", config_uid, config_gid);
1093 fputs(CS string_from_gstring(g), fp);
1095 fprintf(fp, "Size of off_t: " SIZE_T_FMT "\n", sizeof(off_t));
1097 /* Everything else is details which are only worth reporting when debugging.
1098 Perhaps the tls_version_report should move into this too. */
1101 /* clang defines __GNUC__ (at least, for me) so test for it first */
1102 #if defined(__clang__)
1103 fprintf(fp, "Compiler: CLang [%s]\n", __clang_version__);
1104 #elif defined(__GNUC__)
1105 fprintf(fp, "Compiler: GCC [%s]\n",
1109 "? unknown version ?"
1113 fprintf(fp, "Compiler: <unknown>\n");
1116 #if defined(__GLIBC__) && !defined(__UCLIBC__)
1117 fprintf(fp, "Library version: Glibc: Compile: %d.%d\n",
1118 __GLIBC__, __GLIBC_MINOR__);
1119 if (__GLIBC_PREREQ(2, 1))
1120 fprintf(fp, " Runtime: %s\n",
1121 gnu_get_libc_version());
1124 show_db_version(fp);
1127 tls_version_report(fp);
1130 utf8_version_report(fp);
1133 spf_lib_version_report(fp);
1136 for (auth_info * authi = auths_available; *authi->driver_name != '\0'; ++authi)
1137 if (authi->version_report)
1138 (*authi->version_report)(fp);
1140 /* PCRE_PRERELEASE is either defined and empty or a bare sequence of
1141 characters; unless it's an ancient version of PCRE in which case it
1143 #ifndef PCRE_PRERELEASE
1144 # define PCRE_PRERELEASE
1147 #define EXPAND_AND_QUOTE(X) QUOTE(X)
1148 fprintf(fp, "Library version: PCRE: Compile: %d.%d%s\n"
1150 PCRE_MAJOR, PCRE_MINOR,
1151 EXPAND_AND_QUOTE(PCRE_PRERELEASE) "",
1154 #undef EXPAND_AND_QUOTE
1157 for (int i = 0; i < lookup_list_count; i++)
1158 if (lookup_list[i]->version_report)
1159 lookup_list[i]->version_report(fp);
1161 #ifdef WHITELIST_D_MACROS
1162 fprintf(fp, "WHITELIST_D_MACROS: \"%s\"\n", WHITELIST_D_MACROS);
1164 fprintf(fp, "WHITELIST_D_MACROS unset\n");
1166 #ifdef TRUSTED_CONFIG_LIST
1167 fprintf(fp, "TRUSTED_CONFIG_LIST: \"%s\"\n", TRUSTED_CONFIG_LIST);
1169 fprintf(fp, "TRUSTED_CONFIG_LIST unset\n");
1173 store_reset(reset_point);
1177 /*************************************************
1178 * Show auxiliary information about Exim *
1179 *************************************************/
1182 show_exim_information(enum commandline_info request, FILE *stream)
1187 fprintf(stream, "Oops, something went wrong.\n");
1191 "The -bI: flag takes a string indicating which information to provide.\n"
1192 "If the string is not recognised, you'll get this help (on stderr).\n"
1194 " exim -bI:help this information\n"
1195 " exim -bI:dscp list of known dscp value keywords\n"
1196 " exim -bI:sieve list of supported sieve extensions\n"
1200 for (const uschar ** pp = exim_sieve_extension_list; *pp; ++pp)
1201 fprintf(stream, "%s\n", *pp);
1204 dscp_list_to_stream(stream);
1210 /*************************************************
1211 * Quote a local part *
1212 *************************************************/
1214 /* This function is used when a sender address or a From: or Sender: header
1215 line is being created from the caller's login, or from an authenticated_id. It
1216 applies appropriate quoting rules for a local part.
1218 Argument: the local part
1219 Returns: the local part, quoted if necessary
1223 local_part_quote(uschar *lpart)
1225 BOOL needs_quote = FALSE;
1228 for (uschar * t = lpart; !needs_quote && *t != 0; t++)
1230 needs_quote = !isalnum(*t) && strchr("!#$%&'*+-/=?^_`{|}~", *t) == NULL &&
1231 (*t != '.' || t == lpart || t[1] == 0);
1234 if (!needs_quote) return lpart;
1236 g = string_catn(NULL, US"\"", 1);
1240 uschar *nq = US Ustrpbrk(lpart, "\\\"");
1243 g = string_cat(g, lpart);
1246 g = string_catn(g, lpart, nq - lpart);
1247 g = string_catn(g, US"\\", 1);
1248 g = string_catn(g, nq, 1);
1252 g = string_catn(g, US"\"", 1);
1253 return string_from_gstring(g);
1259 /*************************************************
1260 * Load readline() functions *
1261 *************************************************/
1263 /* This function is called from testing executions that read data from stdin,
1264 but only when running as the calling user. Currently, only -be does this. The
1265 function loads the readline() function library and passes back the functions.
1266 On some systems, it needs the curses library, so load that too, but try without
1267 it if loading fails. All this functionality has to be requested at build time.
1270 fn_readline_ptr pointer to where to put the readline pointer
1271 fn_addhist_ptr pointer to where to put the addhistory function
1273 Returns: the dlopen handle or NULL on failure
1277 set_readline(char * (**fn_readline_ptr)(const char *),
1278 void (**fn_addhist_ptr)(const char *))
1281 void *dlhandle_curses = dlopen("libcurses." DYNLIB_FN_EXT, RTLD_GLOBAL|RTLD_LAZY);
1283 dlhandle = dlopen("libreadline." DYNLIB_FN_EXT, RTLD_GLOBAL|RTLD_NOW);
1284 if (dlhandle_curses) dlclose(dlhandle_curses);
1288 /* Checked manual pages; at least in GNU Readline 6.1, the prototypes are:
1289 * char * readline (const char *prompt);
1290 * void add_history (const char *string);
1292 *fn_readline_ptr = (char *(*)(const char*))dlsym(dlhandle, "readline");
1293 *fn_addhist_ptr = (void(*)(const char*))dlsym(dlhandle, "add_history");
1296 DEBUG(D_any) debug_printf("failed to load readline: %s\n", dlerror());
1304 /*************************************************
1305 * Get a line from stdin for testing things *
1306 *************************************************/
1308 /* This function is called when running tests that can take a number of lines
1309 of input (for example, -be and -bt). It handles continuations and trailing
1310 spaces. And prompting and a blank line output on eof. If readline() is in use,
1311 the arguments are non-NULL and provide the relevant functions.
1314 fn_readline readline function or NULL
1315 fn_addhist addhist function or NULL
1317 Returns: pointer to dynamic memory, or NULL at end of file
1321 get_stdinput(char *(*fn_readline)(const char *), void(*fn_addhist)(const char *))
1325 if (!fn_readline) { printf("> "); fflush(stdout); }
1327 for (int i = 0;; i++)
1329 uschar buffer[1024];
1333 char *readline_line = NULL;
1336 if (!(readline_line = fn_readline((i > 0)? "":"> "))) break;
1337 if (*readline_line != 0 && fn_addhist) fn_addhist(readline_line);
1338 p = US readline_line;
1343 /* readline() not in use */
1346 if (Ufgets(buffer, sizeof(buffer), stdin) == NULL) break;
1350 /* Handle the line */
1352 ss = p + (int)Ustrlen(p);
1353 while (ss > p && isspace(ss[-1])) ss--;
1356 while (p < ss && isspace(*p)) p++; /* leading space after cont */
1358 g = string_catn(g, p, ss - p);
1361 if (fn_readline) free(readline_line);
1364 /* g can only be NULL if ss==p */
1365 if (ss == p || g->s[g->ptr-1] != '\\')
1369 (void) string_from_gstring(g);
1372 if (!g) printf("\n");
1373 return string_from_gstring(g);
1378 /*************************************************
1379 * Output usage information for the program *
1380 *************************************************/
1382 /* This function is called when there are no recipients
1383 or a specific --help argument was added.
1386 progname information on what name we were called by
1388 Returns: DOES NOT RETURN
1392 exim_usage(uschar *progname)
1395 /* Handle specific program invocation variants */
1396 if (Ustrcmp(progname, US"-mailq") == 0)
1398 "mailq - list the contents of the mail queue\n\n"
1399 "For a list of options, see the Exim documentation.\n");
1401 /* Generic usage - we output this whatever happens */
1403 "Exim is a Mail Transfer Agent. It is normally called by Mail User Agents,\n"
1404 "not directly from a shell command line. Options and/or arguments control\n"
1405 "what it does when called. For a list of options, see the Exim documentation.\n");
1410 /*************************************************
1411 * Validate that the macros given are okay *
1412 *************************************************/
1414 /* Typically, Exim will drop privileges if macros are supplied. In some
1415 cases, we want to not do so.
1417 Arguments: opt_D_used - true if the commandline had a "-D" option
1418 Returns: true if trusted, false otherwise
1422 macros_trusted(BOOL opt_D_used)
1424 #ifdef WHITELIST_D_MACROS
1425 uschar *whitelisted, *end, *p, **whites;
1426 int white_count, i, n;
1428 BOOL prev_char_item, found;
1433 #ifndef WHITELIST_D_MACROS
1437 /* We only trust -D overrides for some invoking users:
1438 root, the exim run-time user, the optional config owner user.
1439 I don't know why config-owner would be needed, but since they can own the
1440 config files anyway, there's no security risk to letting them override -D. */
1441 if ( ! ((real_uid == root_uid)
1442 || (real_uid == exim_uid)
1443 #ifdef CONFIGURE_OWNER
1444 || (real_uid == config_uid)
1448 debug_printf("macros_trusted rejecting macros for uid %d\n", (int) real_uid);
1452 /* Get a list of macros which are whitelisted */
1453 whitelisted = string_copy_perm(US WHITELIST_D_MACROS, FALSE);
1454 prev_char_item = FALSE;
1456 for (p = whitelisted; *p != '\0'; ++p)
1458 if (*p == ':' || isspace(*p))
1463 prev_char_item = FALSE;
1466 if (!prev_char_item)
1467 prev_char_item = TRUE;
1474 whites = store_malloc(sizeof(uschar *) * (white_count+1));
1475 for (p = whitelisted, i = 0; (p != end) && (i < white_count); ++p)
1480 if (i == white_count)
1482 while (*p != '\0' && p < end)
1488 /* The list of commandline macros should be very short.
1489 Accept the N*M complexity. */
1490 for (macro_item * m = macros_user; m; m = m->next) if (m->command_line)
1493 for (uschar ** w = whites; *w; ++w)
1494 if (Ustrcmp(*w, m->name) == 0)
1501 if (!m->replacement)
1503 if ((len = m->replen) == 0)
1505 n = pcre_exec(regex_whitelisted_macro, NULL, CS m->replacement, len,
1506 0, PCRE_EOPT, NULL, 0);
1509 if (n != PCRE_ERROR_NOMATCH)
1510 debug_printf("macros_trusted checking %s returned %d\n", m->name, n);
1514 DEBUG(D_any) debug_printf("macros_trusted overridden to true by whitelisting\n");
1520 /*************************************************
1521 * Expansion testing *
1522 *************************************************/
1524 /* Expand and print one item, doing macro-processing.
1527 item line for expansion
1531 expansion_test_line(uschar * line)
1536 Ustrncpy(big_buffer, line, big_buffer_size);
1537 big_buffer[big_buffer_size-1] = '\0';
1538 len = Ustrlen(big_buffer);
1540 (void) macros_expand(0, &len, &dummy_macexp);
1542 if (isupper(big_buffer[0]))
1544 if (macro_read_assignment(big_buffer))
1545 printf("Defined macro '%s'\n", mlast->name);
1548 if ((line = expand_string(big_buffer))) printf("%s\n", CS line);
1549 else printf("Failed: %s\n", expand_string_message);
1554 /*************************************************
1555 * Entry point and high-level code *
1556 *************************************************/
1558 /* Entry point for the Exim mailer. Analyse the arguments and arrange to take
1559 the appropriate action. All the necessary functions are present in the one
1560 binary. I originally thought one should split it up, but it turns out that so
1561 much of the apparatus is needed in each chunk that one might as well just have
1562 it all available all the time, which then makes the coding easier as well.
1565 argc count of entries in argv
1566 argv argument strings, with argv[0] being the program name
1568 Returns: EXIT_SUCCESS if terminated successfully
1569 EXIT_FAILURE otherwise, except when a message has been sent
1570 to the sender, and -oee was given
1574 main(int argc, char **cargv)
1576 uschar **argv = USS cargv;
1577 int arg_receive_timeout = -1;
1578 int arg_smtp_receive_timeout = -1;
1579 int arg_error_handling = error_handling;
1580 int filter_sfd = -1;
1581 int filter_ufd = -1;
1584 int list_queue_option = 0;
1586 int msg_action_arg = -1;
1587 int namelen = (argv[0] == NULL)? 0 : Ustrlen(argv[0]);
1588 int queue_only_reason = 0;
1590 int perl_start_option = 0;
1592 int recipients_arg = argc;
1593 int sender_address_domain = 0;
1594 int test_retry_arg = -1;
1595 int test_rewrite_arg = -1;
1596 gid_t original_egid;
1597 BOOL arg_queue_only = FALSE;
1598 BOOL bi_option = FALSE;
1599 BOOL checking = FALSE;
1600 BOOL count_queue = FALSE;
1601 BOOL expansion_test = FALSE;
1602 BOOL extract_recipients = FALSE;
1603 BOOL flag_G = FALSE;
1604 BOOL flag_n = FALSE;
1605 BOOL forced_delivery = FALSE;
1606 BOOL f_end_dot = FALSE;
1607 BOOL deliver_give_up = FALSE;
1608 BOOL list_queue = FALSE;
1609 BOOL list_options = FALSE;
1610 BOOL list_config = FALSE;
1611 BOOL local_queue_only;
1613 BOOL one_msg_action = FALSE;
1614 BOOL opt_D_used = FALSE;
1615 BOOL queue_only_set = FALSE;
1616 BOOL receiving_message = TRUE;
1617 BOOL sender_ident_set = FALSE;
1618 BOOL session_local_queue_only;
1620 BOOL removed_privilege = FALSE;
1621 BOOL usage_wanted = FALSE;
1622 BOOL verify_address_mode = FALSE;
1623 BOOL verify_as_sender = FALSE;
1624 BOOL version_printed = FALSE;
1625 uschar *alias_arg = NULL;
1626 uschar *called_as = US"";
1627 uschar *cmdline_syslog_name = NULL;
1628 uschar *start_queue_run_id = NULL;
1629 uschar *stop_queue_run_id = NULL;
1630 uschar *expansion_test_message = NULL;
1631 uschar *ftest_domain = NULL;
1632 uschar *ftest_localpart = NULL;
1633 uschar *ftest_prefix = NULL;
1634 uschar *ftest_suffix = NULL;
1635 uschar *log_oneline = NULL;
1636 uschar *malware_test_file = NULL;
1637 uschar *real_sender_address;
1638 uschar *originator_home = US"/";
1642 struct stat statbuf;
1643 pid_t passed_qr_pid = (pid_t)0;
1644 int passed_qr_pipe = -1;
1645 gid_t group_list[EXIM_GROUPLIST_SIZE];
1647 /* For the -bI: flag */
1648 enum commandline_info info_flag = CMDINFO_NONE;
1649 BOOL info_stdout = FALSE;
1651 /* Possible options for -R and -S */
1653 static uschar *rsopts[] = { US"f", US"ff", US"r", US"rf", US"rff" };
1655 /* Need to define this in case we need to change the environment in order
1656 to get rid of a bogus time zone. We have to make it char rather than uschar
1657 because some OS define it in /usr/include/unistd.h. */
1659 extern char **environ;
1661 #ifdef MEASURE_TIMING
1662 (void)gettimeofday(×tamp_startup, NULL);
1665 /* If the Exim user and/or group and/or the configuration file owner/group were
1666 defined by ref:name at build time, we must now find the actual uid/gid values.
1667 This is a feature to make the lives of binary distributors easier. */
1669 #ifdef EXIM_USERNAME
1670 if (route_finduser(US EXIM_USERNAME, &pw, &exim_uid))
1673 exim_fail("exim: refusing to run with uid 0 for \"%s\"\n", EXIM_USERNAME);
1675 /* If ref:name uses a number as the name, route_finduser() returns
1676 TRUE with exim_uid set and pw coerced to NULL. */
1678 exim_gid = pw->pw_gid;
1679 #ifndef EXIM_GROUPNAME
1682 "exim: ref:name should specify a usercode, not a group.\n"
1683 "exim: can't let you get away with it unless you also specify a group.\n");
1687 exim_fail("exim: failed to find uid for user name \"%s\"\n", EXIM_USERNAME);
1690 #ifdef EXIM_GROUPNAME
1691 if (!route_findgroup(US EXIM_GROUPNAME, &exim_gid))
1692 exim_fail("exim: failed to find gid for group name \"%s\"\n", EXIM_GROUPNAME);
1695 #ifdef CONFIGURE_OWNERNAME
1696 if (!route_finduser(US CONFIGURE_OWNERNAME, NULL, &config_uid))
1697 exim_fail("exim: failed to find uid for user name \"%s\"\n",
1698 CONFIGURE_OWNERNAME);
1701 /* We default the system_filter_user to be the Exim run-time user, as a
1702 sane non-root value. */
1703 system_filter_uid = exim_uid;
1705 #ifdef CONFIGURE_GROUPNAME
1706 if (!route_findgroup(US CONFIGURE_GROUPNAME, &config_gid))
1707 exim_fail("exim: failed to find gid for group name \"%s\"\n",
1708 CONFIGURE_GROUPNAME);
1711 /* In the Cygwin environment, some initialization used to need doing.
1712 It was fudged in by means of this macro; now no longer but we'll leave
1713 it in case of others. */
1719 /* Check a field which is patched when we are running Exim within its
1720 testing harness; do a fast initial check, and then the whole thing. */
1722 f.running_in_test_harness =
1723 *running_status == '<' && Ustrcmp(running_status, "<<<testing>>>") == 0;
1724 if (f.running_in_test_harness)
1727 /* The C standard says that the equivalent of setlocale(LC_ALL, "C") is obeyed
1728 at the start of a program; however, it seems that some environments do not
1729 follow this. A "strange" locale can affect the formatting of timestamps, so we
1732 setlocale(LC_ALL, "C");
1734 /* Get the offset between CLOCK_MONOTONIC and wallclock */
1736 #ifdef _POSIX_MONOTONIC_CLOCK
1740 /* Set up the default handler for timing using alarm(). */
1742 os_non_restarting_signal(SIGALRM, sigalrm_handler);
1744 /* Ensure we have a buffer for constructing log entries. Use malloc directly,
1745 because store_malloc writes a log entry on failure. */
1747 if (!(log_buffer = US malloc(LOG_BUFFER_SIZE)))
1748 exim_fail("exim: failed to get store for log buffer\n");
1750 /* Initialize the default log options. */
1752 bits_set(log_selector, log_selector_size, log_default);
1754 /* Set log_stderr to stderr, provided that stderr exists. This gets reset to
1755 NULL when the daemon is run and the file is closed. We have to use this
1756 indirection, because some systems don't allow writing to the variable "stderr".
1759 if (fstat(fileno(stderr), &statbuf) >= 0) log_stderr = stderr;
1761 /* Arrange for the PCRE regex library to use our store functions. Note that
1762 the normal calls are actually macros that add additional arguments for
1763 debugging purposes so we have to assign specially constructed functions here.
1764 The default is to use store in the stacking pool, but this is overridden in the
1765 regex_must_compile() function. */
1767 pcre_malloc = function_store_get;
1768 pcre_free = function_dummy_free;
1770 /* Ensure there is a big buffer for temporary use in several places. It is put
1771 in malloc store so that it can be freed for enlargement if necessary. */
1773 big_buffer = store_malloc(big_buffer_size);
1775 /* Set up the handler for the data request signal, and set the initial
1776 descriptive text. */
1778 process_info = store_get(PROCESS_INFO_SIZE, TRUE); /* tainted */
1779 set_process_info("initializing");
1780 os_restarting_signal(SIGUSR1, usr1_handler);
1782 /* If running in a dockerized environment, the TERM signal is only
1783 delegated to the PID 1 if we request it by setting an signal handler */
1784 if (getpid() == 1) signal(SIGTERM, term_handler);
1786 /* SIGHUP is used to get the daemon to reconfigure. It gets set as appropriate
1787 in the daemon code. For the rest of Exim's uses, we ignore it. */
1789 signal(SIGHUP, SIG_IGN);
1791 /* We don't want to die on pipe errors as the code is written to handle
1792 the write error instead. */
1794 signal(SIGPIPE, SIG_IGN);
1796 /* Under some circumstance on some OS, Exim can get called with SIGCHLD
1797 set to SIG_IGN. This causes subprocesses that complete before the parent
1798 process waits for them not to hang around, so when Exim calls wait(), nothing
1799 is there. The wait() code has been made robust against this, but let's ensure
1800 that SIGCHLD is set to SIG_DFL, because it's tidier to wait and get a process
1801 ending status. We use sigaction rather than plain signal() on those OS where
1802 SA_NOCLDWAIT exists, because we want to be sure it is turned off. (There was a
1803 problem on AIX with this.) */
1807 struct sigaction act;
1808 act.sa_handler = SIG_DFL;
1809 sigemptyset(&(act.sa_mask));
1811 sigaction(SIGCHLD, &act, NULL);
1814 signal(SIGCHLD, SIG_DFL);
1817 /* Save the arguments for use if we re-exec exim as a daemon after receiving
1822 /* Set up the version number. Set up the leading 'E' for the external form of
1823 message ids, set the pointer to the internal form, and initialize it to
1824 indicate no message being processed. */
1827 message_id_option[0] = '-';
1828 message_id_external = message_id_option + 1;
1829 message_id_external[0] = 'E';
1830 message_id = message_id_external + 1;
1833 /* Set the umask to zero so that any files Exim creates using open() are
1834 created with the modes that it specifies. NOTE: Files created with fopen() have
1835 a problem, which was not recognized till rather late (February 2006). With this
1836 umask, such files will be world writeable. (They are all content scanning files
1837 in the spool directory, which isn't world-accessible, so this is not a
1838 disaster, but it's untidy.) I don't want to change this overall setting,
1839 however, because it will interact badly with the open() calls. Instead, there's
1840 now a function called modefopen() that fiddles with the umask while calling
1845 /* Precompile the regular expression for matching a message id. Keep this in
1846 step with the code that generates ids in the accept.c module. We need to do
1847 this here, because the -M options check their arguments for syntactic validity
1848 using mac_ismsgid, which uses this. */
1851 regex_must_compile(US"^(?:[^\\W_]{6}-){2}[^\\W_]{2}$", FALSE, TRUE);
1853 /* Precompile the regular expression that is used for matching an SMTP error
1854 code, possibly extended, at the start of an error message. Note that the
1855 terminating whitespace character is included. */
1858 regex_must_compile(US"^\\d\\d\\d\\s(?:\\d\\.\\d\\d?\\d?\\.\\d\\d?\\d?\\s)?",
1861 #ifdef WHITELIST_D_MACROS
1862 /* Precompile the regular expression used to filter the content of macros
1863 given to -D for permissibility. */
1865 regex_whitelisted_macro =
1866 regex_must_compile(US"^[A-Za-z0-9_/.-]*$", FALSE, TRUE);
1869 for (i = 0; i < REGEX_VARS; i++) regex_vars[i] = NULL;
1871 /* If the program is called as "mailq" treat it as equivalent to "exim -bp";
1872 this seems to be a generally accepted convention, since one finds symbolic
1873 links called "mailq" in standard OS configurations. */
1875 if ((namelen == 5 && Ustrcmp(argv[0], "mailq") == 0) ||
1876 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/mailq", 6) == 0))
1879 receiving_message = FALSE;
1880 called_as = US"-mailq";
1883 /* If the program is called as "rmail" treat it as equivalent to
1884 "exim -i -oee", thus allowing UUCP messages to be input using non-SMTP mode,
1885 i.e. preventing a single dot on a line from terminating the message, and
1886 returning with zero return code, even in cases of error (provided an error
1887 message has been sent). */
1889 if ((namelen == 5 && Ustrcmp(argv[0], "rmail") == 0) ||
1890 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/rmail", 6) == 0))
1893 called_as = US"-rmail";
1894 errors_sender_rc = EXIT_SUCCESS;
1897 /* If the program is called as "rsmtp" treat it as equivalent to "exim -bS";
1898 this is a smail convention. */
1900 if ((namelen == 5 && Ustrcmp(argv[0], "rsmtp") == 0) ||
1901 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/rsmtp", 6) == 0))
1903 smtp_input = smtp_batched_input = TRUE;
1904 called_as = US"-rsmtp";
1907 /* If the program is called as "runq" treat it as equivalent to "exim -q";
1908 this is a smail convention. */
1910 if ((namelen == 4 && Ustrcmp(argv[0], "runq") == 0) ||
1911 (namelen > 4 && Ustrncmp(argv[0] + namelen - 5, "/runq", 5) == 0))
1914 receiving_message = FALSE;
1915 called_as = US"-runq";
1918 /* If the program is called as "newaliases" treat it as equivalent to
1919 "exim -bi"; this is a sendmail convention. */
1921 if ((namelen == 10 && Ustrcmp(argv[0], "newaliases") == 0) ||
1922 (namelen > 10 && Ustrncmp(argv[0] + namelen - 11, "/newaliases", 11) == 0))
1925 receiving_message = FALSE;
1926 called_as = US"-newaliases";
1929 /* Save the original effective uid for a couple of uses later. It should
1930 normally be root, but in some esoteric environments it may not be. */
1932 original_euid = geteuid();
1933 original_egid = getegid();
1935 /* Get the real uid and gid. If the caller is root, force the effective uid/gid
1936 to be the same as the real ones. This makes a difference only if Exim is setuid
1937 (or setgid) to something other than root, which could be the case in some
1938 special configurations. */
1940 real_uid = getuid();
1941 real_gid = getgid();
1943 if (real_uid == root_uid)
1945 if ((rv = setgid(real_gid)))
1946 exim_fail("exim: setgid(%ld) failed: %s\n",
1947 (long int)real_gid, strerror(errno));
1948 if ((rv = setuid(real_uid)))
1949 exim_fail("exim: setuid(%ld) failed: %s\n",
1950 (long int)real_uid, strerror(errno));
1953 /* If neither the original real uid nor the original euid was root, Exim is
1954 running in an unprivileged state. */
1956 unprivileged = (real_uid != root_uid && original_euid != root_uid);
1958 /* For most of the args-parsing we need to use permanent pool memory */
1960 int old_pool = store_pool;
1961 store_pool = POOL_PERM;
1963 /* Scan the program's arguments. Some can be dealt with right away; others are
1964 simply recorded for checking and handling afterwards. Do a high-level switch
1965 on the second character (the one after '-'), to save some effort. */
1967 for (i = 1; i < argc; i++)
1969 BOOL badarg = FALSE;
1970 uschar * arg = argv[i];
1974 /* An argument not starting with '-' is the start of a recipients list;
1975 break out of the options-scanning loop. */
1983 /* An option consisting of -- terminates the options */
1985 if (Ustrcmp(arg, "--") == 0)
1987 recipients_arg = i + 1;
1991 /* Handle flagged options */
1993 switchchar = arg[1];
1996 /* Make all -ex options synonymous with -oex arguments, since that
1997 is assumed by various callers. Also make -qR options synonymous with -R
1998 options, as that seems to be required as well. Allow for -qqR too, and
1999 the same for -S options. */
2001 if (Ustrncmp(arg+1, "oe", 2) == 0 ||
2002 Ustrncmp(arg+1, "qR", 2) == 0 ||
2003 Ustrncmp(arg+1, "qS", 2) == 0)
2005 switchchar = arg[2];
2008 else if (Ustrncmp(arg+1, "qqR", 3) == 0 || Ustrncmp(arg+1, "qqS", 3) == 0)
2010 switchchar = arg[3];
2012 f.queue_2stage = TRUE;
2015 /* Make -r synonymous with -f, since it is a documented alias */
2017 else if (arg[1] == 'r') switchchar = 'f';
2019 /* Make -ov synonymous with -v */
2021 else if (Ustrcmp(arg, "-ov") == 0)
2027 /* deal with --option_aliases */
2028 else if (switchchar == '-')
2030 if (Ustrcmp(argrest, "help") == 0)
2032 usage_wanted = TRUE;
2035 else if (Ustrcmp(argrest, "version") == 0)
2042 /* High-level switch on active initial letter */
2047 /* sendmail uses -Ac and -Am to control which .cf file is used;
2050 if (!*argrest) { badarg = TRUE; break; }
2053 BOOL ignore = FALSE;
2058 if (*(argrest + 1) == '\0')
2062 if (!ignore) badarg = TRUE;
2066 /* -Btype is a sendmail option for 7bit/8bit setting. Exim is 8-bit clean
2067 so has no need of it. */
2070 if (!*argrest) i++; /* Skip over the type */
2076 receiving_message = FALSE; /* Reset TRUE for -bm, -bS, -bs below */
2080 /* -bd: Run in daemon mode, awaiting SMTP connections.
2081 -bdf: Ditto, but in the foreground.
2084 f.daemon_listen = TRUE;
2085 if (*argrest == 'f') f.background_daemon = FALSE;
2086 else if (*argrest) badarg = TRUE;
2089 /* -be: Run in expansion test mode
2090 -bem: Ditto, but read a message from a file first
2093 expansion_test = checking = TRUE;
2094 if (*argrest == 'm')
2096 if (++i >= argc) { badarg = TRUE; break; }
2097 expansion_test_message = argv[i];
2100 if (*argrest) badarg = TRUE;
2103 /* -bF: Run system filter test */
2105 filter_test |= checking = FTEST_SYSTEM;
2106 if (*argrest) badarg = TRUE;
2107 else if (++i < argc) filter_test_sfile = argv[i];
2108 else exim_fail("exim: file name expected after %s\n", argv[i-1]);
2111 /* -bf: Run user filter test
2112 -bfd: Set domain for filter testing
2113 -bfl: Set local part for filter testing
2114 -bfp: Set prefix for filter testing
2115 -bfs: Set suffix for filter testing
2120 filter_test |= checking = FTEST_USER;
2121 if (++i < argc) filter_test_ufile = argv[i];
2122 else exim_fail("exim: file name expected after %s\n", argv[i-1]);
2127 exim_fail("exim: string expected after %s\n", arg);
2128 if (Ustrcmp(argrest, "d") == 0) ftest_domain = argv[i];
2129 else if (Ustrcmp(argrest, "l") == 0) ftest_localpart = argv[i];
2130 else if (Ustrcmp(argrest, "p") == 0) ftest_prefix = argv[i];
2131 else if (Ustrcmp(argrest, "s") == 0) ftest_suffix = argv[i];
2136 /* -bh: Host checking - an IP address must follow. */
2138 if (!*argrest || Ustrcmp(argrest, "c") == 0)
2140 if (++i >= argc) { badarg = TRUE; break; }
2141 sender_host_address = string_copy_taint(argv[i], TRUE);
2142 host_checking = checking = f.log_testing_mode = TRUE;
2143 f.host_checking_callout = *argrest == 'c';
2144 message_logs = FALSE;
2149 /* -bi: This option is used by sendmail to initialize *the* alias file,
2150 though it has the -oA option to specify a different file. Exim has no
2151 concept of *the* alias file, but since Sun's YP make script calls
2152 sendmail this way, some support must be provided. */
2154 if (!*++argrest) bi_option = TRUE;
2158 /* -bI: provide information, of the type to follow after a colon.
2159 This is an Exim flag. */
2161 if (Ustrlen(argrest) >= 1 && *argrest == ':')
2163 uschar *p = argrest+1;
2164 info_flag = CMDINFO_HELP;
2166 if (strcmpic(p, CUS"sieve") == 0)
2168 info_flag = CMDINFO_SIEVE;
2171 else if (strcmpic(p, CUS"dscp") == 0)
2173 info_flag = CMDINFO_DSCP;
2176 else if (strcmpic(p, CUS"help") == 0)
2182 /* -bm: Accept and deliver message - the default option. Reinstate
2183 receiving_message, which got turned off for all -b options.
2184 -bmalware: test the filename given for malware */
2186 if (!*argrest) receiving_message = TRUE;
2187 else if (Ustrcmp(argrest, "alware") == 0)
2189 if (++i >= argc) { badarg = TRUE; break; }
2191 malware_test_file = argv[i];
2196 /* -bnq: For locally originating messages, do not qualify unqualified
2197 addresses. In the envelope, this causes errors; in header lines they
2200 if (Ustrcmp(argrest, "q") == 0)
2202 f.allow_unqualified_sender = FALSE;
2203 f.allow_unqualified_recipient = FALSE;
2208 /* -bpxx: List the contents of the mail queue, in various forms. If
2209 the option is -bpc, just a queue count is needed. Otherwise, if the
2210 first letter after p is r, then order is random. */
2212 if (*argrest == 'c')
2215 if (*++argrest) badarg = TRUE;
2219 if (*argrest == 'r')
2221 list_queue_option = 8;
2224 else list_queue_option = 0;
2228 /* -bp: List the contents of the mail queue, top-level only */
2232 /* -bpu: List the contents of the mail queue, top-level undelivered */
2234 else if (Ustrcmp(argrest, "u") == 0) list_queue_option += 1;
2236 /* -bpa: List the contents of the mail queue, including all delivered */
2238 else if (Ustrcmp(argrest, "a") == 0) list_queue_option += 2;
2240 /* Unknown after -bp[r] */
2246 /* -bP: List the configuration variables given as the address list.
2247 Force -v, so configuration errors get displayed. */
2250 /* -bP config: we need to setup here, because later,
2251 * when list_options is checked, the config is read already */
2254 else if (argv[i+1] && Ustrcmp(argv[i+1], "config") == 0)
2257 readconf_save_config(version_string);
2261 list_options = TRUE;
2262 debug_selector |= D_v;
2263 debug_file = stderr;
2267 /* -brt: Test retry configuration lookup */
2269 if (Ustrcmp(argrest, "t") == 0)
2272 test_retry_arg = i + 1;
2276 /* -brw: Test rewrite configuration */
2278 else if (Ustrcmp(argrest, "w") == 0)
2281 test_rewrite_arg = i + 1;
2287 /* -bS: Read SMTP commands on standard input, but produce no replies -
2288 all errors are reported by sending messages. */
2291 smtp_input = smtp_batched_input = receiving_message = TRUE;
2295 /* -bs: Read SMTP commands on standard input and produce SMTP replies
2296 on standard output. */
2298 if (!*argrest) smtp_input = receiving_message = TRUE;
2302 /* -bt: address testing mode */
2305 f.address_test_mode = checking = f.log_testing_mode = TRUE;
2309 /* -bv: verify addresses */
2312 verify_address_mode = checking = f.log_testing_mode = TRUE;
2314 /* -bvs: verify sender addresses */
2316 else if (Ustrcmp(argrest, "s") == 0)
2318 verify_address_mode = checking = f.log_testing_mode = TRUE;
2319 verify_as_sender = TRUE;
2324 /* -bV: Print version string and support details */
2328 printf("Exim version %s #%s built %s\n", version_string,
2329 version_cnumber, version_date);
2330 printf("%s\n", CS version_copyright);
2331 version_printed = TRUE;
2332 show_whats_supported(stdout);
2333 f.log_testing_mode = TRUE;
2338 /* -bw: inetd wait mode, accept a listening socket as stdin */
2340 f.inetd_wait_mode = TRUE;
2341 f.background_daemon = FALSE;
2342 f.daemon_listen = TRUE;
2344 if ((inetd_wait_timeout = readconf_readtime(argrest, 0, FALSE)) <= 0)
2345 exim_fail("exim: bad time value %s: abandoned\n", argv[i]);
2356 /* -C: change configuration file list; ignore if it isn't really
2357 a change! Enforce a prefix check if required. */
2361 if (++i < argc) argrest = argv[i]; else { badarg = TRUE; break; }
2362 if (Ustrcmp(config_main_filelist, argrest) != 0)
2364 #ifdef ALT_CONFIG_PREFIX
2366 int len = Ustrlen(ALT_CONFIG_PREFIX);
2367 const uschar *list = argrest;
2369 while((filename = string_nextinlist(&list, &sep, big_buffer,
2371 if ( ( Ustrlen(filename) < len
2372 || Ustrncmp(filename, ALT_CONFIG_PREFIX, len) != 0
2373 || Ustrstr(filename, "/../") != NULL
2375 && (Ustrcmp(filename, "/dev/null") != 0 || real_uid != root_uid)
2377 exim_fail("-C Permission denied\n");
2379 if (real_uid != root_uid)
2381 #ifdef TRUSTED_CONFIG_LIST
2383 if (real_uid != exim_uid
2384 #ifdef CONFIGURE_OWNER
2385 && real_uid != config_uid
2388 f.trusted_config = FALSE;
2391 FILE *trust_list = Ufopen(TRUSTED_CONFIG_LIST, "rb");
2394 struct stat statbuf;
2396 if (fstat(fileno(trust_list), &statbuf) != 0 ||
2397 (statbuf.st_uid != root_uid /* owner not root */
2398 #ifdef CONFIGURE_OWNER
2399 && statbuf.st_uid != config_uid /* owner not the special one */
2402 (statbuf.st_gid != root_gid /* group not root */
2403 #ifdef CONFIGURE_GROUP
2404 && statbuf.st_gid != config_gid /* group not the special one */
2406 && (statbuf.st_mode & 020) != 0 /* group writeable */
2408 (statbuf.st_mode & 2) != 0) /* world writeable */
2410 f.trusted_config = FALSE;
2415 /* Well, the trust list at least is up to scratch... */
2417 uschar *trusted_configs[32];
2420 int old_pool = store_pool;
2421 store_pool = POOL_MAIN;
2423 reset_point = store_mark();
2424 while (Ufgets(big_buffer, big_buffer_size, trust_list))
2426 uschar *start = big_buffer, *nl;
2427 while (*start && isspace(*start))
2431 nl = Ustrchr(start, '\n');
2434 trusted_configs[nr_configs++] = string_copy(start);
2435 if (nr_configs == nelem(trusted_configs))
2443 const uschar *list = argrest;
2445 while (f.trusted_config && (filename = string_nextinlist(&list,
2446 &sep, big_buffer, big_buffer_size)))
2448 for (i=0; i < nr_configs; i++)
2449 if (Ustrcmp(filename, trusted_configs[i]) == 0)
2451 if (i == nr_configs)
2453 f.trusted_config = FALSE;
2458 else /* No valid prefixes found in trust_list file. */
2459 f.trusted_config = FALSE;
2460 store_reset(reset_point);
2461 store_pool = old_pool;
2464 else /* Could not open trust_list file. */
2465 f.trusted_config = FALSE;
2468 /* Not root; don't trust config */
2469 f.trusted_config = FALSE;
2473 config_main_filelist = argrest;
2474 f.config_changed = TRUE;
2479 /* -D: set up a macro definition */
2482 #ifdef DISABLE_D_OPTION
2483 exim_fail("exim: -D is not available in this Exim binary\n");
2489 uschar *s = argrest;
2492 while (isspace(*s)) s++;
2494 if (*s < 'A' || *s > 'Z')
2495 exim_fail("exim: macro name set by -D must start with "
2496 "an upper case letter\n");
2498 while (isalnum(*s) || *s == '_')
2500 if (ptr < sizeof(name)-1) name[ptr++] = *s;
2504 if (ptr == 0) { badarg = TRUE; break; }
2505 while (isspace(*s)) s++;
2508 if (*s++ != '=') { badarg = TRUE; break; }
2509 while (isspace(*s)) s++;
2512 for (m = macros_user; m; m = m->next)
2513 if (Ustrcmp(m->name, name) == 0)
2514 exim_fail("exim: duplicated -D in command line\n");
2516 m = macro_create(name, s, TRUE);
2518 if (clmacro_count >= MAX_CLMACROS)
2519 exim_fail("exim: too many -D options on command line\n");
2520 clmacros[clmacro_count++] =
2521 string_sprintf("-D%s=%s", m->name, m->replacement);
2526 /* -d: Set debug level (see also -v below) or set the drop_cr option.
2527 The latter is now a no-op, retained for compatibility only. If -dd is used,
2528 debugging subprocesses of the daemon is disabled. */
2531 if (Ustrcmp(argrest, "ropcr") == 0)
2533 /* drop_cr = TRUE; */
2536 /* Use an intermediate variable so that we don't set debugging while
2537 decoding the debugging bits. */
2541 unsigned int selector = D_default;
2544 if (*argrest == 'd')
2546 f.debug_daemon = TRUE;
2550 decode_bits(&selector, 1, debug_notall, argrest,
2551 debug_options, debug_options_count, US"debug", 0);
2552 debug_selector = selector;
2557 /* -E: This is a local error message. This option is not intended for
2558 external use at all, but is not restricted to trusted callers because it
2559 does no harm (just suppresses certain error messages) and if Exim is run
2560 not setuid root it won't always be trusted when it generates error
2561 messages using this option. If there is a message id following -E, point
2562 message_reference at it, for logging. */
2565 f.local_error_message = TRUE;
2566 if (mac_ismsgid(argrest)) message_reference = argrest;
2570 /* -ex: The vacation program calls sendmail with the undocumented "-eq"
2571 option, so it looks as if historically the -oex options are also callable
2572 without the leading -o. So we have to accept them. Before the switch,
2573 anything starting -oe has been converted to -e. Exim does not support all
2574 of the sendmail error options. */
2577 if (Ustrcmp(argrest, "e") == 0)
2579 arg_error_handling = ERRORS_SENDER;
2580 errors_sender_rc = EXIT_SUCCESS;
2582 else if (Ustrcmp(argrest, "m") == 0) arg_error_handling = ERRORS_SENDER;
2583 else if (Ustrcmp(argrest, "p") == 0) arg_error_handling = ERRORS_STDERR;
2584 else if (Ustrcmp(argrest, "q") == 0) arg_error_handling = ERRORS_STDERR;
2585 else if (Ustrcmp(argrest, "w") == 0) arg_error_handling = ERRORS_SENDER;
2590 /* -F: Set sender's full name, used instead of the gecos entry from
2591 the password file. Since users can usually alter their gecos entries,
2592 there's no security involved in using this instead. The data can follow
2593 the -F or be in the next argument. */
2597 if (++i < argc) argrest = argv[i]; else { badarg = TRUE; break; }
2598 originator_name = string_copy_taint(argrest, TRUE);
2599 f.sender_name_forced = TRUE;
2603 /* -f: Set sender's address - this value is only actually used if Exim is
2604 run by a trusted user, or if untrusted_set_sender is set and matches the
2605 address, except that the null address can always be set by any user. The
2606 test for this happens later, when the value given here is ignored when not
2607 permitted. For an untrusted user, the actual sender is still put in Sender:
2608 if it doesn't match the From: header (unless no_local_from_check is set).
2609 The data can follow the -f or be in the next argument. The -r switch is an
2610 obsolete form of -f but since there appear to be programs out there that
2611 use anything that sendmail has ever supported, better accept it - the
2612 synonymizing is done before the switch above.
2614 At this stage, we must allow domain literal addresses, because we don't
2615 know what the setting of allow_domain_literals is yet. Ditto for trailing
2616 dots and strip_trailing_dot. */
2620 int dummy_start, dummy_end;
2623 if (i+1 < argc) argrest = argv[++i]; else { badarg = TRUE; break; }
2625 *(sender_address = store_get(1, FALSE)) = '\0'; /* Ensure writeable memory */
2628 uschar * temp = argrest + Ustrlen(argrest) - 1;
2629 while (temp >= argrest && isspace(*temp)) temp--;
2630 if (temp >= argrest && *temp == '.') f_end_dot = TRUE;
2631 allow_domain_literals = TRUE;
2632 strip_trailing_dot = TRUE;
2634 allow_utf8_domains = TRUE;
2636 if (!(sender_address = parse_extract_address(argrest, &errmess,
2637 &dummy_start, &dummy_end, &sender_address_domain, TRUE)))
2638 exim_fail("exim: bad -f address \"%s\": %s\n", argrest, errmess);
2640 sender_address = string_copy_taint(sender_address, TRUE);
2642 message_smtputf8 = string_is_utf8(sender_address);
2643 allow_utf8_domains = FALSE;
2645 allow_domain_literals = FALSE;
2646 strip_trailing_dot = FALSE;
2648 f.sender_address_forced = TRUE;
2652 /* -G: sendmail invocation to specify that it's a gateway submission and
2653 sendmail may complain about problems instead of fixing them.
2654 We make it equivalent to an ACL "control = suppress_local_fixups" and do
2655 not at this time complain about problems. */
2661 /* -h: Set the hop count for an incoming message. Exim does not currently
2662 support this; it always computes it by counting the Received: headers.
2663 To put it in will require a change to the spool header file format. */
2667 if (++i < argc) argrest = argv[i]; else { badarg = TRUE; break; }
2668 if (!isdigit(*argrest)) badarg = TRUE;
2672 /* -i: Set flag so dot doesn't end non-SMTP input (same as -oi, seems
2673 not to be documented for sendmail but mailx (at least) uses it) */
2676 if (!*argrest) f.dot_ends = FALSE; else badarg = TRUE;
2680 /* -L: set the identifier used for syslog; equivalent to setting
2681 syslog_processname in the config file, but needs to be an admin option. */
2685 if (++i < argc) argrest = argv[i]; else { badarg = TRUE; break; }
2686 if ((sz = Ustrlen(argrest)) > 32)
2687 exim_fail("exim: the -L syslog name is too long: \"%s\"\n", argrest);
2689 exim_fail("exim: the -L syslog name is too short\n");
2690 cmdline_syslog_name = string_copy_taint(argrest, TRUE);
2694 receiving_message = FALSE;
2696 /* -MC: continue delivery of another message via an existing open
2697 file descriptor. This option is used for an internal call by the
2698 smtp transport when there is a pending message waiting to go to an
2699 address to which it has got a connection. Five subsequent arguments are
2700 required: transport name, host name, IP address, sequence number, and
2701 message_id. Transports may decline to create new processes if the sequence
2702 number gets too big. The channel is stdin. This (-MC) must be the last
2703 argument. There's a subsequent check that the real-uid is privileged.
2705 If we are running in the test harness. delay for a bit, to let the process
2706 that set this one up complete. This makes for repeatability of the logging,
2709 if (Ustrcmp(argrest, "C") == 0)
2711 union sockaddr_46 interface_sock;
2712 EXIM_SOCKLEN_T size = sizeof(interface_sock);
2715 exim_fail("exim: too many or too few arguments after -MC\n");
2717 if (msg_action_arg >= 0)
2718 exim_fail("exim: incompatible arguments\n");
2720 continue_transport = string_copy_taint(argv[++i], TRUE);
2721 continue_hostname = string_copy_taint(argv[++i], TRUE);
2722 continue_host_address = string_copy_taint(argv[++i], TRUE);
2723 continue_sequence = Uatoi(argv[++i]);
2724 msg_action = MSG_DELIVER;
2725 msg_action_arg = ++i;
2726 forced_delivery = TRUE;
2727 queue_run_pid = passed_qr_pid;
2728 queue_run_pipe = passed_qr_pipe;
2730 if (!mac_ismsgid(argv[i]))
2731 exim_fail("exim: malformed message id %s after -MC option\n",
2734 /* Set up $sending_ip_address and $sending_port, unless proxied */
2736 if (!continue_proxy_cipher)
2737 if (getsockname(fileno(stdin), (struct sockaddr *)(&interface_sock),
2739 sending_ip_address = host_ntoa(-1, &interface_sock, NULL,
2742 exim_fail("exim: getsockname() failed after -MC option: %s\n",
2745 testharness_pause_ms(500);
2749 else if (*argrest == 'C' && argrest[1] && !argrest[2])
2753 /* -MCA: set the smtp_authenticated flag; this is useful only when it
2754 precedes -MC (see above). The flag indicates that the host to which
2755 Exim is connected has accepted an AUTH sequence. */
2757 case 'A': f.smtp_authenticated = TRUE; break;
2759 /* -MCD: set the smtp_use_dsn flag; this indicates that the host
2760 that exim is connected to supports the esmtp extension DSN */
2762 case 'D': smtp_peer_options |= OPTION_DSN; break;
2764 /* -MCd: for debug, set a process-purpose string */
2766 case 'd': if (++i < argc)
2767 process_purpose = string_copy_taint(argv[i], TRUE);
2771 /* -MCG: set the queue name, to a non-default value */
2773 case 'G': if (++i < argc) queue_name = string_copy_taint(argv[i], TRUE);
2777 /* -MCK: the peer offered CHUNKING. Must precede -MC */
2779 case 'K': smtp_peer_options |= OPTION_CHUNKING; break;
2781 /* -MCP: set the smtp_use_pipelining flag; this is useful only when
2782 it preceded -MC (see above) */
2784 case 'P': smtp_peer_options |= OPTION_PIPE; break;
2786 /* -MCQ: pass on the pid of the queue-running process that started
2787 this chain of deliveries and the fd of its synchronizing pipe; this
2788 is useful only when it precedes -MC (see above) */
2790 case 'Q': if (++i < argc) passed_qr_pid = (pid_t)(Uatol(argv[i]));
2792 if (++i < argc) passed_qr_pipe = (int)(Uatol(argv[i]));
2796 /* -MCS: set the smtp_use_size flag; this is useful only when it
2797 precedes -MC (see above) */
2799 case 'S': smtp_peer_options |= OPTION_SIZE; break;
2802 /* -MCt: similar to -MCT below but the connection is still open
2803 via a proxy process which handles the TLS context and coding.
2804 Require three arguments for the proxied local address and port,
2805 and the TLS cipher. */
2807 case 't': if (++i < argc)
2808 sending_ip_address = string_copy_taint(argv[i], TRUE);
2811 sending_port = (int)(Uatol(argv[i]));
2814 continue_proxy_cipher = string_copy_taint(argv[i], TRUE);
2818 /* -MCT: set the tls_offered flag; this is useful only when it
2819 precedes -MC (see above). The flag indicates that the host to which
2820 Exim is connected has offered TLS support. */
2822 case 'T': smtp_peer_options |= OPTION_TLS; break;
2825 default: badarg = TRUE; break;
2830 /* -M[x]: various operations on the following list of message ids:
2831 -M deliver the messages, ignoring next retry times and thawing
2832 -Mc deliver the messages, checking next retry times, no thawing
2833 -Mf freeze the messages
2834 -Mg give up on the messages
2835 -Mt thaw the messages
2836 -Mrm remove the messages
2837 In the above cases, this must be the last option. There are also the
2838 following options which are followed by a single message id, and which
2839 act on that message. Some of them use the "recipient" addresses as well.
2840 -Mar add recipient(s)
2841 -Mmad mark all recipients delivered
2842 -Mmd mark recipients(s) delivered
2844 -Mset load a message for use with -be
2846 -Mvc show copy (of whole message, in RFC 2822 format)
2853 msg_action = MSG_DELIVER;
2854 forced_delivery = f.deliver_force_thaw = TRUE;
2856 else if (Ustrcmp(argrest, "ar") == 0)
2858 msg_action = MSG_ADD_RECIPIENT;
2859 one_msg_action = TRUE;
2861 else if (Ustrcmp(argrest, "c") == 0) msg_action = MSG_DELIVER;
2862 else if (Ustrcmp(argrest, "es") == 0)
2864 msg_action = MSG_EDIT_SENDER;
2865 one_msg_action = TRUE;
2867 else if (Ustrcmp(argrest, "f") == 0) msg_action = MSG_FREEZE;
2868 else if (Ustrcmp(argrest, "g") == 0)
2870 msg_action = MSG_DELIVER;
2871 deliver_give_up = TRUE;
2873 else if (Ustrcmp(argrest, "G") == 0)
2875 msg_action = MSG_SETQUEUE;
2876 queue_name_dest = string_copy_taint(argv[++i], TRUE);
2878 else if (Ustrcmp(argrest, "mad") == 0)
2880 msg_action = MSG_MARK_ALL_DELIVERED;
2882 else if (Ustrcmp(argrest, "md") == 0)
2884 msg_action = MSG_MARK_DELIVERED;
2885 one_msg_action = TRUE;
2887 else if (Ustrcmp(argrest, "rm") == 0) msg_action = MSG_REMOVE;
2888 else if (Ustrcmp(argrest, "set") == 0)
2890 msg_action = MSG_LOAD;
2891 one_msg_action = TRUE;
2893 else if (Ustrcmp(argrest, "t") == 0) msg_action = MSG_THAW;
2894 else if (Ustrcmp(argrest, "vb") == 0)
2896 msg_action = MSG_SHOW_BODY;
2897 one_msg_action = TRUE;
2899 else if (Ustrcmp(argrest, "vc") == 0)
2901 msg_action = MSG_SHOW_COPY;
2902 one_msg_action = TRUE;
2904 else if (Ustrcmp(argrest, "vh") == 0)
2906 msg_action = MSG_SHOW_HEADER;
2907 one_msg_action = TRUE;
2909 else if (Ustrcmp(argrest, "vl") == 0)
2911 msg_action = MSG_SHOW_LOG;
2912 one_msg_action = TRUE;
2914 else { badarg = TRUE; break; }
2916 /* All the -Mxx options require at least one message id. */
2918 msg_action_arg = i + 1;
2919 if (msg_action_arg >= argc)
2920 exim_fail("exim: no message ids given after %s option\n", arg);
2922 /* Some require only message ids to follow */
2924 if (!one_msg_action)
2926 for (int j = msg_action_arg; j < argc; j++) if (!mac_ismsgid(argv[j]))
2927 exim_fail("exim: malformed message id %s after %s option\n",
2929 goto END_ARG; /* Remaining args are ids */
2932 /* Others require only one message id, possibly followed by addresses,
2933 which will be handled as normal arguments. */
2937 if (!mac_ismsgid(argv[msg_action_arg]))
2938 exim_fail("exim: malformed message id %s after %s option\n",
2939 argv[msg_action_arg], arg);
2945 /* Some programs seem to call the -om option without the leading o;
2946 for sendmail it askes for "me too". Exim always does this. */
2949 if (*argrest) badarg = TRUE;
2953 /* -N: don't do delivery - a debugging option that stops transports doing
2954 their thing. It implies debugging at the D_v level. */
2959 f.dont_deliver = TRUE;
2960 debug_selector |= D_v;
2961 debug_file = stderr;
2967 /* -n: This means "don't alias" in sendmail, apparently.
2968 For normal invocations, it has no effect.
2969 It may affect some other options. */
2975 /* -O: Just ignore it. In sendmail, apparently -O option=value means set
2976 option to the specified value. This form uses long names. We need to handle
2977 -O option=value and -Ooption=value. */
2982 exim_fail("exim: string expected after -O\n");
2988 /* -oA: Set an argument for the bi command (sendmail's "alternate alias
2991 if (!*(alias_arg = argrest))
2992 if (i+1 < argc) alias_arg = argv[++i];
2993 else exim_fail("exim: string expected after -oA\n");
2996 /* -oB: Set a connection message max value for remote deliveries */
2999 uschar * p = argrest;
3001 if (i+1 < argc && isdigit((argv[i+1][0])))
3005 connection_max_messages = 1;
3012 exim_fail("exim: number expected after -oB\n");
3013 connection_max_messages = Uatoi(p);
3018 /* -odb: background delivery */
3021 if (Ustrcmp(argrest, "b") == 0)
3023 f.synchronous_delivery = FALSE;
3024 arg_queue_only = FALSE;
3025 queue_only_set = TRUE;
3028 /* -odd: testsuite-only: add no inter-process delays */
3030 else if (Ustrcmp(argrest, "d") == 0)
3031 f.testsuite_delays = FALSE;
3033 /* -odf: foreground delivery (smail-compatible option); same effect as
3034 -odi: interactive (synchronous) delivery (sendmail-compatible option)
3037 else if (Ustrcmp(argrest, "f") == 0 || Ustrcmp(argrest, "i") == 0)
3039 f.synchronous_delivery = TRUE;
3040 arg_queue_only = FALSE;
3041 queue_only_set = TRUE;
3044 /* -odq: queue only */
3046 else if (Ustrcmp(argrest, "q") == 0)
3048 f.synchronous_delivery = FALSE;
3049 arg_queue_only = TRUE;
3050 queue_only_set = TRUE;
3053 /* -odqs: queue SMTP only - do local deliveries and remote routing,
3054 but no remote delivery */
3056 else if (Ustrcmp(argrest, "qs") == 0)
3058 f.queue_smtp = TRUE;
3059 arg_queue_only = FALSE;
3060 queue_only_set = TRUE;
3065 /* -oex: Sendmail error flags. As these are also accepted without the
3066 leading -o prefix, for compatibility with vacation and other callers,
3067 they are handled with -e above. */
3069 /* -oi: Set flag so dot doesn't end non-SMTP input (same as -i)
3070 -oitrue: Another sendmail syntax for the same */
3073 if (!*argrest || Ustrcmp(argrest, "true") == 0)
3078 /* -oM*: Set various characteristics for an incoming message; actually
3079 acted on for trusted callers only. */
3084 exim_fail("exim: data expected after -oM%s\n", argrest);
3086 /* -oMa: Set sender host address */
3088 if (Ustrcmp(argrest, "a") == 0)
3089 sender_host_address = string_copy_taint(argv[++i], TRUE);
3091 /* -oMaa: Set authenticator name */
3093 else if (Ustrcmp(argrest, "aa") == 0)
3094 sender_host_authenticated = string_copy_taint(argv[++i], TRUE);
3096 /* -oMas: setting authenticated sender */
3098 else if (Ustrcmp(argrest, "as") == 0)
3099 authenticated_sender = string_copy_taint(argv[++i], TRUE);
3101 /* -oMai: setting authenticated id */
3103 else if (Ustrcmp(argrest, "ai") == 0)
3104 authenticated_id = string_copy_taint(argv[++i], TRUE);
3106 /* -oMi: Set incoming interface address */
3108 else if (Ustrcmp(argrest, "i") == 0)
3109 interface_address = string_copy_taint(argv[++i], TRUE);
3111 /* -oMm: Message reference */
3113 else if (Ustrcmp(argrest, "m") == 0)
3115 if (!mac_ismsgid(argv[i+1]))
3116 exim_fail("-oMm must be a valid message ID\n");
3117 if (!f.trusted_config)
3118 exim_fail("-oMm must be called by a trusted user/config\n");
3119 message_reference = argv[++i];
3122 /* -oMr: Received protocol */
3124 else if (Ustrcmp(argrest, "r") == 0)
3126 if (received_protocol)
3127 exim_fail("received_protocol is set already\n");
3129 received_protocol = string_copy_taint(argv[++i], TRUE);
3131 /* -oMs: Set sender host name */
3133 else if (Ustrcmp(argrest, "s") == 0)
3134 sender_host_name = string_copy_taint(argv[++i], TRUE);
3136 /* -oMt: Set sender ident */
3138 else if (Ustrcmp(argrest, "t") == 0)
3140 sender_ident_set = TRUE;
3141 sender_ident = string_copy_taint(argv[++i], TRUE);
3144 /* Else a bad argument */
3151 /* -om: Me-too flag for aliases. Exim always does this. Some programs
3152 seem to call this as -m (undocumented), so that is also accepted (see
3154 /* -oo: An ancient flag for old-style addresses which still seems to
3155 crop up in some calls (see in SCO). */
3159 if (*argrest) badarg = TRUE;
3162 /* -oP <name>: set pid file path for daemon
3163 -oPX: delete pid file of daemon */
3166 if (!*argrest) override_pid_file_path = argv[++i];
3167 else if (Ustrcmp(argrest, "X") == 0) delete_pid_file();
3172 /* -or <n>: set timeout for non-SMTP acceptance
3173 -os <n>: set timeout for SMTP acceptance */
3178 int * tp = argrest[-1] == 'r'
3179 ? &arg_receive_timeout : &arg_smtp_receive_timeout;
3181 *tp = readconf_readtime(argrest, 0, FALSE);
3182 else if (i+1 < argc)
3183 *tp = readconf_readtime(argv[++i], 0, FALSE);
3186 exim_fail("exim: bad time value %s: abandoned\n", argv[i]);
3190 /* -oX <list>: Override local_interfaces and/or default daemon ports */
3193 if (*argrest) badarg = TRUE;
3194 else override_local_interfaces = string_copy_taint(argv[++i], TRUE);
3197 /* Unknown -o argument */
3205 /* -ps: force Perl startup; -pd force delayed Perl startup */
3209 if (*argrest == 's' && argrest[1] == 0)
3211 perl_start_option = 1;
3214 if (*argrest == 'd' && argrest[1] == 0)
3216 perl_start_option = -1;
3221 /* -panythingelse is taken as the Sendmail-compatible argument -prval:sval,
3222 which sets the host protocol and host name */
3225 if (i+1 < argc) argrest = argv[++i]; else { badarg = TRUE; break; }
3229 uschar * hn = Ustrchr(argrest, ':');
3231 if (received_protocol)
3232 exim_fail("received_protocol is set already\n");
3235 received_protocol = string_copy_taint(argrest, TRUE);
3238 received_protocol = string_copyn_taint(argrest, hn - argrest, TRUE);
3239 sender_host_name = string_copy_taint(hn + 1, TRUE);
3246 receiving_message = FALSE;
3247 if (queue_interval >= 0)
3248 exim_fail("exim: -q specified more than once\n");
3250 /* -qq...: Do queue runs in a 2-stage manner */
3252 if (*argrest == 'q')
3254 f.queue_2stage = TRUE;
3258 /* -qi...: Do only first (initial) deliveries */
3260 if (*argrest == 'i')
3262 f.queue_run_first_delivery = TRUE;
3266 /* -qf...: Run the queue, forcing deliveries
3267 -qff..: Ditto, forcing thawing as well */
3269 if (*argrest == 'f')
3271 f.queue_run_force = TRUE;
3272 if (*++argrest == 'f')
3274 f.deliver_force_thaw = TRUE;
3279 /* -q[f][f]l...: Run the queue only on local deliveries */
3281 if (*argrest == 'l')
3283 f.queue_run_local = TRUE;
3287 /* -q[f][f][l][G<name>]... Work on the named queue */
3289 if (*argrest == 'G')
3292 for (argrest++, i = 0; argrest[i] && argrest[i] != '/'; ) i++;
3293 queue_name = string_copyn(argrest, i);
3295 if (*argrest == '/') argrest++;
3298 /* -q[f][f][l][G<name>]: Run the queue, optionally forced, optionally local
3299 only, optionally named, optionally starting from a given message id. */
3301 if (!(list_queue || count_queue))
3303 && (i + 1 >= argc || argv[i+1][0] == '-' || mac_ismsgid(argv[i+1])))
3306 if (i+1 < argc && mac_ismsgid(argv[i+1]))
3307 start_queue_run_id = string_copy_taint(argv[++i], TRUE);
3308 if (i+1 < argc && mac_ismsgid(argv[i+1]))
3309 stop_queue_run_id = string_copy_taint(argv[++i], TRUE);
3312 /* -q[f][f][l][G<name>/]<n>: Run the queue at regular intervals, optionally
3313 forced, optionally local only, optionally named. */
3315 else if ((queue_interval = readconf_readtime(*argrest ? argrest : argv[++i],
3317 exim_fail("exim: bad time value %s: abandoned\n", argv[i]);
3321 case 'R': /* Synonymous with -qR... */
3322 receiving_message = FALSE;
3324 /* -Rf: As -R (below) but force all deliveries,
3325 -Rff: Ditto, but also thaw all frozen messages,
3326 -Rr: String is regex
3327 -Rrf: Regex and force
3328 -Rrff: Regex and force and thaw
3330 in all cases provided there are no further characters in this
3334 for (int i = 0; i < nelem(rsopts); i++)
3335 if (Ustrcmp(argrest, rsopts[i]) == 0)
3337 if (i != 2) f.queue_run_force = TRUE;
3338 if (i >= 2) f.deliver_selectstring_regex = TRUE;
3339 if (i == 1 || i == 4) f.deliver_force_thaw = TRUE;
3340 argrest += Ustrlen(rsopts[i]);
3343 /* -R: Set string to match in addresses for forced queue run to
3344 pick out particular messages. */
3347 deliver_selectstring = string_copy_taint(argrest, TRUE);
3348 else if (i+1 < argc)
3349 deliver_selectstring = string_copy_taint(argv[++i], TRUE);
3351 exim_fail("exim: string expected after -R\n");
3355 /* -r: an obsolete synonym for -f (see above) */
3358 /* -S: Like -R but works on sender. */
3360 case 'S': /* Synonymous with -qS... */
3361 receiving_message = FALSE;
3363 /* -Sf: As -S (below) but force all deliveries,
3364 -Sff: Ditto, but also thaw all frozen messages,
3365 -Sr: String is regex
3366 -Srf: Regex and force
3367 -Srff: Regex and force and thaw
3369 in all cases provided there are no further characters in this
3373 for (int i = 0; i < nelem(rsopts); i++)
3374 if (Ustrcmp(argrest, rsopts[i]) == 0)
3376 if (i != 2) f.queue_run_force = TRUE;
3377 if (i >= 2) f.deliver_selectstring_sender_regex = TRUE;
3378 if (i == 1 || i == 4) f.deliver_force_thaw = TRUE;
3379 argrest += Ustrlen(rsopts[i]);
3382 /* -S: Set string to match in addresses for forced queue run to
3383 pick out particular messages. */
3386 deliver_selectstring_sender = string_copy_taint(argrest, TRUE);
3387 else if (i+1 < argc)
3388 deliver_selectstring_sender = string_copy_taint(argv[++i], TRUE);
3390 exim_fail("exim: string expected after -S\n");
3393 /* -Tqt is an option that is exclusively for use by the testing suite.
3394 It is not recognized in other circumstances. It allows for the setting up
3395 of explicit "queue times" so that various warning/retry things can be
3396 tested. Otherwise variability of clock ticks etc. cause problems. */
3399 if (f.running_in_test_harness && Ustrcmp(argrest, "qt") == 0)
3400 fudged_queue_times = string_copy_taint(argv[++i], TRUE);
3405 /* -t: Set flag to extract recipients from body of message. */
3408 if (!*argrest) extract_recipients = TRUE;
3410 /* -ti: Set flag to extract recipients from body of message, and also
3411 specify that dot does not end the message. */
3413 else if (Ustrcmp(argrest, "i") == 0)
3415 extract_recipients = TRUE;
3419 /* -tls-on-connect: don't wait for STARTTLS (for old clients) */
3422 else if (Ustrcmp(argrest, "ls-on-connect") == 0) tls_in.on_connect = TRUE;
3429 /* -U: This means "initial user submission" in sendmail, apparently. The
3430 doc claims that in future sendmail may refuse syntactically invalid
3431 messages instead of fixing them. For the moment, we just ignore it. */
3437 /* -v: verify things - this is a very low-level debugging */
3442 debug_selector |= D_v;
3443 debug_file = stderr;
3449 /* -x: AIX uses this to indicate some fancy 8-bit character stuff:
3451 The -x flag tells the sendmail command that mail from a local
3452 mail program has National Language Support (NLS) extended characters
3453 in the body of the mail item. The sendmail command can send mail with
3454 extended NLS characters across networks that normally corrupts these
3457 As Exim is 8-bit clean, it just ignores this flag. */
3460 if (*argrest) badarg = TRUE;
3463 /* -X: in sendmail: takes one parameter, logfile, and sends debugging
3464 logs to that file. We swallow the parameter and otherwise ignore it. */
3469 exim_fail("exim: string expected after -X\n");
3475 log_oneline = string_copy_taint(argv[i], TRUE);
3477 exim_fail("exim: file name expected after %s\n", argv[i-1]);
3480 /* All other initial characters are errors */
3485 } /* End of high-level switch statement */
3487 /* Failed to recognize the option, or syntax error */
3490 exim_fail("exim abandoned: unknown, malformed, or incomplete "
3491 "option %s\n", arg);
3495 /* If -R or -S have been specified without -q, assume a single queue run. */
3497 if ( (deliver_selectstring || deliver_selectstring_sender)
3498 && queue_interval < 0)
3503 store_pool = old_pool;
3506 /* If usage_wanted is set we call the usage function - which never returns */
3507 if (usage_wanted) exim_usage(called_as);
3509 /* Arguments have been processed. Check for incompatibilities. */
3511 (smtp_input || extract_recipients || recipients_arg < argc) &&
3512 (f.daemon_listen || queue_interval >= 0 || bi_option ||
3513 test_retry_arg >= 0 || test_rewrite_arg >= 0 ||
3514 filter_test != FTEST_NONE || (msg_action_arg > 0 && !one_msg_action))
3517 msg_action_arg > 0 &&
3518 (f.daemon_listen || queue_interval > 0 || list_options ||
3519 (checking && msg_action != MSG_LOAD) ||
3520 bi_option || test_retry_arg >= 0 || test_rewrite_arg >= 0)
3523 (f.daemon_listen || queue_interval > 0) &&
3524 (sender_address != NULL || list_options || list_queue || checking ||
3528 f.daemon_listen && queue_interval == 0
3531 f.inetd_wait_mode && queue_interval >= 0
3535 (checking || smtp_input || extract_recipients ||
3536 filter_test != FTEST_NONE || bi_option)
3539 verify_address_mode &&
3540 (f.address_test_mode || smtp_input || extract_recipients ||
3541 filter_test != FTEST_NONE || bi_option)
3544 f.address_test_mode && (smtp_input || extract_recipients ||
3545 filter_test != FTEST_NONE || bi_option)
3548 smtp_input && (sender_address != NULL || filter_test != FTEST_NONE ||
3552 deliver_selectstring != NULL && queue_interval < 0
3555 msg_action == MSG_LOAD &&
3556 (!expansion_test || expansion_test_message != NULL)
3559 exim_fail("exim: incompatible command-line options or arguments\n");
3561 /* If debugging is set up, set the file and the file descriptor to pass on to
3562 child processes. It should, of course, be 2 for stderr. Also, force the daemon
3563 to run in the foreground. */
3565 if (debug_selector != 0)
3567 debug_file = stderr;
3568 debug_fd = fileno(debug_file);
3569 f.background_daemon = FALSE;
3570 testharness_pause_ms(100); /* lets caller finish */
3571 if (debug_selector != D_v) /* -v only doesn't show this */
3573 debug_printf("Exim version %s uid=%ld gid=%ld pid=%d D=%x\n",
3574 version_string, (long int)real_uid, (long int)real_gid, (int)getpid(),
3576 if (!version_printed)
3577 show_whats_supported(stderr);
3581 /* When started with root privilege, ensure that the limits on the number of
3582 open files and the number of processes (where that is accessible) are
3583 sufficiently large, or are unset, in case Exim has been called from an
3584 environment where the limits are screwed down. Not all OS have the ability to
3585 change some of these limits. */
3589 DEBUG(D_any) debug_print_ids(US"Exim has no root privilege:");
3595 #ifdef RLIMIT_NOFILE
3596 if (getrlimit(RLIMIT_NOFILE, &rlp) < 0)
3598 log_write(0, LOG_MAIN|LOG_PANIC, "getrlimit(RLIMIT_NOFILE) failed: %s",
3600 rlp.rlim_cur = rlp.rlim_max = 0;
3603 /* I originally chose 1000 as a nice big number that was unlikely to
3604 be exceeded. It turns out that some older OS have a fixed upper limit of
3607 if (rlp.rlim_cur < 1000)
3609 rlp.rlim_cur = rlp.rlim_max = 1000;
3610 if (setrlimit(RLIMIT_NOFILE, &rlp) < 0)
3612 rlp.rlim_cur = rlp.rlim_max = 256;
3613 if (setrlimit(RLIMIT_NOFILE, &rlp) < 0)
3614 log_write(0, LOG_MAIN|LOG_PANIC, "setrlimit(RLIMIT_NOFILE) failed: %s",
3621 if (getrlimit(RLIMIT_NPROC, &rlp) < 0)
3623 log_write(0, LOG_MAIN|LOG_PANIC, "getrlimit(RLIMIT_NPROC) failed: %s",
3625 rlp.rlim_cur = rlp.rlim_max = 0;
3628 #ifdef RLIM_INFINITY
3629 if (rlp.rlim_cur != RLIM_INFINITY && rlp.rlim_cur < 1000)
3631 rlp.rlim_cur = rlp.rlim_max = RLIM_INFINITY;
3633 if (rlp.rlim_cur < 1000)
3635 rlp.rlim_cur = rlp.rlim_max = 1000;
3637 if (setrlimit(RLIMIT_NPROC, &rlp) < 0)
3638 log_write(0, LOG_MAIN|LOG_PANIC, "setrlimit(RLIMIT_NPROC) failed: %s",
3644 /* Exim is normally entered as root (but some special configurations are
3645 possible that don't do this). However, it always spins off sub-processes that
3646 set their uid and gid as required for local delivery. We don't want to pass on
3647 any extra groups that root may belong to, so we want to get rid of them all at
3650 We need to obey setgroups() at this stage, before possibly giving up root
3651 privilege for a changed configuration file, but later on we might need to
3652 check on the additional groups for the admin user privilege - can't do that
3653 till after reading the config, which might specify the exim gid. Therefore,
3654 save the group list here first. */
3656 if ((group_count = getgroups(nelem(group_list), group_list)) < 0)
3657 exim_fail("exim: getgroups() failed: %s\n", strerror(errno));
3659 /* There is a fundamental difference in some BSD systems in the matter of
3660 groups. FreeBSD and BSDI are known to be different; NetBSD and OpenBSD are
3661 known not to be different. On the "different" systems there is a single group
3662 list, and the first entry in it is the current group. On all other versions of
3663 Unix there is a supplementary group list, which is in *addition* to the current
3664 group. Consequently, to get rid of all extraneous groups on a "standard" system
3665 you pass over 0 groups to setgroups(), while on a "different" system you pass
3666 over a single group - the current group, which is always the first group in the
3667 list. Calling setgroups() with zero groups on a "different" system results in
3668 an error return. The following code should cope with both types of system.
3670 Unfortunately, recent MacOS, which should be a FreeBSD, "helpfully" succeeds
3671 the "setgroups() with zero groups" - and changes the egid.
3672 Thanks to that we had to stash the original_egid above, for use below
3673 in the call to exim_setugid().
3675 However, if this process isn't running as root, setgroups() can't be used
3676 since you have to be root to run it, even if throwing away groups.
3677 Except, sigh, for Hurd - where you can.
3678 Not being root here happens only in some unusual configurations. */
3681 #ifndef OS_SETGROUPS_ZERO_DROPS_ALL
3682 && setgroups(0, NULL) != 0
3684 && setgroups(1, group_list) != 0)
3685 exim_fail("exim: setgroups() failed: %s\n", strerror(errno));
3687 /* If the configuration file name has been altered by an argument on the
3688 command line (either a new file name or a macro definition) and the caller is
3689 not root, or if this is a filter testing run, remove any setuid privilege the
3690 program has and run as the underlying user.
3692 The exim user is locked out of this, which severely restricts the use of -C
3695 Otherwise, set the real ids to the effective values (should be root unless run
3696 from inetd, which it can either be root or the exim uid, if one is configured).
3698 There is a private mechanism for bypassing some of this, in order to make it
3699 possible to test lots of configurations automatically, without having either to
3700 recompile each time, or to patch in an actual configuration file name and other
3701 values (such as the path name). If running in the test harness, pretend that
3702 configuration file changes and macro definitions haven't happened. */
3705 (!f.trusted_config || /* Config changed, or */
3706 !macros_trusted(opt_D_used)) && /* impermissible macros and */
3707 real_uid != root_uid && /* Not root, and */
3708 !f.running_in_test_harness /* Not fudged */
3710 expansion_test /* expansion testing */
3712 filter_test != FTEST_NONE) /* Filter testing */
3714 setgroups(group_count, group_list);
3715 exim_setugid(real_uid, real_gid, FALSE,
3716 US"-C, -D, -be or -bf forces real uid");
3717 removed_privilege = TRUE;
3719 /* In the normal case when Exim is called like this, stderr is available
3720 and should be used for any logging information because attempts to write
3721 to the log will usually fail. To arrange this, we unset really_exim. However,
3722 if no stderr is available there is no point - we might as well have a go
3723 at the log (if it fails, syslog will be written).
3725 Note that if the invoker is Exim, the logs remain available. Messing with
3726 this causes unlogged successful deliveries. */
3728 if (log_stderr && real_uid != exim_uid)
3729 f.really_exim = FALSE;
3732 /* Privilege is to be retained for the moment. It may be dropped later,
3733 depending on the job that this Exim process has been asked to do. For now, set
3734 the real uid to the effective so that subsequent re-execs of Exim are done by a
3738 exim_setugid(geteuid(), original_egid, FALSE, US"forcing real = effective");
3740 /* If testing a filter, open the file(s) now, before wasting time doing other
3741 setups and reading the message. */
3743 if (filter_test & FTEST_SYSTEM)
3744 if ((filter_sfd = Uopen(filter_test_sfile, O_RDONLY, 0)) < 0)
3745 exim_fail("exim: failed to open %s: %s\n", filter_test_sfile,
3748 if (filter_test & FTEST_USER)
3749 if ((filter_ufd = Uopen(filter_test_ufile, O_RDONLY, 0)) < 0)
3750 exim_fail("exim: failed to open %s: %s\n", filter_test_ufile,
3753 /* Initialise lookup_list
3754 If debugging, already called above via version reporting.
3755 In either case, we initialise the list of available lookups while running
3756 as root. All dynamically modules are loaded from a directory which is
3757 hard-coded into the binary and is code which, if not a module, would be
3758 part of Exim already. Ability to modify the content of the directory
3759 is equivalent to the ability to modify a setuid binary!
3761 This needs to happen before we read the main configuration. */
3765 if (f.running_in_test_harness) smtputf8_advertise_hosts = NULL;
3768 /* Read the main runtime configuration data; this gives up if there
3769 is a failure. It leaves the configuration file open so that the subsequent
3770 configuration data for delivery can be read if needed.
3772 NOTE: immediately after opening the configuration file we change the working
3773 directory to "/"! Later we change to $spool_directory. We do it there, because
3774 during readconf_main() some expansion takes place already. */
3776 /* Store the initial cwd before we change directories. Can be NULL if the
3777 dir has already been unlinked. */
3778 initial_cwd = os_getcwd(NULL, 0);
3781 -be[m] expansion test -
3782 -b[fF] filter test new
3784 -bmalware malware_test_file new
3786 -brw rewrite test new
3788 -bv[s] address verify -
3790 -bP <option> (except -bP config, which sets list_config)
3792 If any of these options is set, we suppress warnings about configuration
3793 issues (currently about tls_advertise_hosts and keep_environment not being
3797 #ifdef MEASURE_TIMING
3798 struct timeval t0, diff;
3799 (void)gettimeofday(&t0, NULL);
3802 readconf_main(checking || list_options);
3804 #ifdef MEASURE_TIMING
3805 report_time_since(&t0, US"readconf_main (delta)");
3810 /* Now in directory "/" */
3812 if (cleanup_environment() == FALSE)
3813 log_write(0, LOG_PANIC_DIE, "Can't cleanup environment");
3816 /* If an action on specific messages is requested, or if a daemon or queue
3817 runner is being started, we need to know if Exim was called by an admin user.
3818 This is the case if the real user is root or exim, or if the real group is
3819 exim, or if one of the supplementary groups is exim or a group listed in
3820 admin_groups. We don't fail all message actions immediately if not admin_user,
3821 since some actions can be performed by non-admin users. Instead, set admin_user
3822 for later interrogation. */
3824 if (real_uid == root_uid || real_uid == exim_uid || real_gid == exim_gid)
3825 f.admin_user = TRUE;
3827 for (int i = 0; i < group_count && !f.admin_user; i++)
3828 if (group_list[i] == exim_gid)
3829 f.admin_user = TRUE;
3830 else if (admin_groups)
3831 for (int j = 1; j <= (int)admin_groups[0] && !f.admin_user; j++)
3832 if (admin_groups[j] == group_list[i])
3833 f.admin_user = TRUE;
3835 /* Another group of privileged users are the trusted users. These are root,
3836 exim, and any caller matching trusted_users or trusted_groups. Trusted callers
3837 are permitted to specify sender_addresses with -f on the command line, and
3838 other message parameters as well. */
3840 if (real_uid == root_uid || real_uid == exim_uid)
3841 f.trusted_caller = TRUE;
3845 for (int i = 1; i <= (int)trusted_users[0] && !f.trusted_caller; i++)
3846 if (trusted_users[i] == real_uid)
3847 f.trusted_caller = TRUE;
3850 for (int i = 1; i <= (int)trusted_groups[0] && !f.trusted_caller; i++)
3851 if (trusted_groups[i] == real_gid)
3852 f.trusted_caller = TRUE;
3853 else for (int j = 0; j < group_count && !f.trusted_caller; j++)
3854 if (trusted_groups[i] == group_list[j])
3855 f.trusted_caller = TRUE;
3858 /* At this point, we know if the user is privileged and some command-line
3859 options become possibly impermissible, depending upon the configuration file. */
3861 if (checking && commandline_checks_require_admin && !f.admin_user)
3862 exim_fail("exim: those command-line flags are set to require admin\n");
3864 /* Handle the decoding of logging options. */
3866 decode_bits(log_selector, log_selector_size, log_notall,
3867 log_selector_string, log_options, log_options_count, US"log", 0);
3871 debug_printf("configuration file is %s\n", config_main_filename);
3872 debug_printf("log selectors =");
3873 for (int i = 0; i < log_selector_size; i++)
3874 debug_printf(" %08x", log_selector[i]);
3878 /* If domain literals are not allowed, check the sender address that was
3879 supplied with -f. Ditto for a stripped trailing dot. */
3883 if (sender_address[sender_address_domain] == '[' && !allow_domain_literals)
3884 exim_fail("exim: bad -f address \"%s\": domain literals not "
3885 "allowed\n", sender_address);
3886 if (f_end_dot && !strip_trailing_dot)
3887 exim_fail("exim: bad -f address \"%s.\": domain is malformed "
3888 "(trailing dot not allowed)\n", sender_address);
3891 /* See if an admin user overrode our logging. */
3893 if (cmdline_syslog_name)
3896 syslog_processname = cmdline_syslog_name;
3897 log_file_path = string_copy(CUS"syslog");
3900 /* not a panic, non-privileged users should not be able to spam paniclog */
3902 "exim: you lack sufficient privilege to specify syslog process name\n");
3904 /* Paranoia check of maximum lengths of certain strings. There is a check
3905 on the length of the log file path in log.c, which will come into effect
3906 if there are any calls to write the log earlier than this. However, if we
3907 get this far but the string is very long, it is better to stop now than to
3908 carry on and (e.g.) receive a message and then have to collapse. The call to
3909 log_write() from here will cause the ultimate panic collapse if the complete
3910 file name exceeds the buffer length. */
3912 if (Ustrlen(log_file_path) > 200)
3913 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3914 "log_file_path is longer than 200 chars: aborting");
3916 if (Ustrlen(pid_file_path) > 200)
3917 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3918 "pid_file_path is longer than 200 chars: aborting");
3920 if (Ustrlen(spool_directory) > 200)
3921 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3922 "spool_directory is longer than 200 chars: aborting");
3924 /* Length check on the process name given to syslog for its TAG field,
3925 which is only permitted to be 32 characters or less. See RFC 3164. */
3927 if (Ustrlen(syslog_processname) > 32)
3928 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3929 "syslog_processname is longer than 32 chars: aborting");
3934 log_write(0, LOG_MAIN, "%s", log_oneline);
3935 return EXIT_SUCCESS;
3938 return EXIT_FAILURE;
3940 /* In some operating systems, the environment variable TMPDIR controls where
3941 temporary files are created; Exim doesn't use these (apart from when delivering
3942 to MBX mailboxes), but called libraries such as DBM libraries may require them.
3943 If TMPDIR is found in the environment, reset it to the value defined in the
3944 EXIM_TMPDIR macro, if this macro is defined. For backward compatibility this
3945 macro may be called TMPDIR in old "Local/Makefile"s. It's converted to
3946 EXIM_TMPDIR by the build scripts.
3950 if (environ) for (uschar ** p = USS environ; *p; p++)
3951 if (Ustrncmp(*p, "TMPDIR=", 7) == 0 && Ustrcmp(*p+7, EXIM_TMPDIR) != 0)
3953 uschar * newp = store_malloc(Ustrlen(EXIM_TMPDIR) + 8);
3954 sprintf(CS newp, "TMPDIR=%s", EXIM_TMPDIR);
3956 DEBUG(D_any) debug_printf("reset TMPDIR=%s in environment\n", EXIM_TMPDIR);
3960 /* Timezone handling. If timezone_string is "utc", set a flag to cause all
3961 timestamps to be in UTC (gmtime() is used instead of localtime()). Otherwise,
3962 we may need to get rid of a bogus timezone setting. This can arise when Exim is
3963 called by a user who has set the TZ variable. This then affects the timestamps
3964 in log files and in Received: headers, and any created Date: header lines. The
3965 required timezone is settable in the configuration file, so nothing can be done
3966 about this earlier - but hopefully nothing will normally be logged earlier than
3967 this. We have to make a new environment if TZ is wrong, but don't bother if
3968 timestamps_utc is set, because then all times are in UTC anyway. */
3970 if (timezone_string && strcmpic(timezone_string, US"UTC") == 0)
3971 f.timestamps_utc = TRUE;
3974 uschar *envtz = US getenv("TZ");
3976 ? !timezone_string || Ustrcmp(timezone_string, envtz) != 0
3977 : timezone_string != NULL
3980 uschar **p = USS environ;
3984 if (environ) while (*p++) count++;
3985 if (!envtz) count++;
3986 newp = new = store_malloc(sizeof(uschar *) * (count + 1));
3987 if (environ) for (p = USS environ; *p; p++)
3988 if (Ustrncmp(*p, "TZ=", 3) != 0) *newp++ = *p;
3989 if (timezone_string)
3991 *newp = store_malloc(Ustrlen(timezone_string) + 4);
3992 sprintf(CS *newp++, "TZ=%s", timezone_string);
3997 DEBUG(D_any) debug_printf("Reset TZ to %s: time is %s\n", timezone_string,
3998 tod_stamp(tod_log));
4002 /* Handle the case when we have removed the setuid privilege because of -C or
4003 -D. This means that the caller of Exim was not root.
4005 There is a problem if we were running as the Exim user. The sysadmin may
4006 expect this case to retain privilege because "the binary was called by the
4007 Exim user", but it hasn't, because either the -D option set macros, or the
4008 -C option set a non-trusted configuration file. There are two possibilities:
4010 (1) If deliver_drop_privilege is set, Exim is not going to re-exec in order
4011 to do message deliveries. Thus, the fact that it is running as a
4012 non-privileged user is plausible, and might be wanted in some special
4013 configurations. However, really_exim will have been set false when
4014 privilege was dropped, to stop Exim trying to write to its normal log
4015 files. Therefore, re-enable normal log processing, assuming the sysadmin
4016 has set up the log directory correctly.
4018 (2) If deliver_drop_privilege is not set, the configuration won't work as
4019 apparently intended, and so we log a panic message. In order to retain
4020 root for -C or -D, the caller must either be root or be invoking a
4021 trusted configuration file (when deliver_drop_privilege is false). */
4023 if ( removed_privilege
4024 && (!f.trusted_config || opt_D_used)
4025 && real_uid == exim_uid)
4026 if (deliver_drop_privilege)
4027 f.really_exim = TRUE; /* let logging work normally */
4029 log_write(0, LOG_MAIN|LOG_PANIC,
4030 "exim user lost privilege for using %s option",
4031 f.trusted_config? "-D" : "-C");
4033 /* Start up Perl interpreter if Perl support is configured and there is a
4034 perl_startup option, and the configuration or the command line specifies
4035 initializing starting. Note that the global variables are actually called
4036 opt_perl_xxx to avoid clashing with perl's namespace (perl_*). */
4039 if (perl_start_option != 0)
4040 opt_perl_at_start = (perl_start_option > 0);
4041 if (opt_perl_at_start && opt_perl_startup != NULL)
4044 DEBUG(D_any) debug_printf("Starting Perl interpreter\n");
4045 if ((errstr = init_perl(opt_perl_startup)))
4046 exim_fail("exim: error in perl_startup code: %s\n", errstr);
4047 opt_perl_started = TRUE;
4049 #endif /* EXIM_PERL */
4051 /* Log the arguments of the call if the configuration file said so. This is
4052 a debugging feature for finding out what arguments certain MUAs actually use.
4053 Don't attempt it if logging is disabled, or if listing variables or if
4054 verifying/testing addresses or expansions. */
4056 if ( (debug_selector & D_any || LOGGING(arguments))
4057 && f.really_exim && !list_options && !checking)
4059 uschar *p = big_buffer;
4060 Ustrcpy(p, US"cwd= (failed)");
4066 Ustrncpy(p + 4, initial_cwd, big_buffer_size-5);
4067 p += 4 + Ustrlen(initial_cwd);
4068 /* in case p is near the end and we don't provide enough space for
4069 * string_format to be willing to write. */
4073 (void)string_format(p, big_buffer_size - (p - big_buffer), " %d args:", argc);
4075 for (int i = 0; i < argc; i++)
4077 int len = Ustrlen(argv[i]);
4078 const uschar *printing;
4080 if (p + len + 8 >= big_buffer + big_buffer_size)
4082 Ustrcpy(p, US" ...");
4083 log_write(0, LOG_MAIN, "%s", big_buffer);
4084 Ustrcpy(big_buffer, US"...");
4087 printing = string_printing(argv[i]);
4088 if (!*printing) quote = US"\"";
4091 const uschar *pp = printing;
4093 while (*pp) if (isspace(*pp++)) { quote = US"\""; break; }
4095 p += sprintf(CS p, " %s%.*s%s", quote, (int)(big_buffer_size -
4096 (p - big_buffer) - 4), printing, quote);
4099 if (LOGGING(arguments))
4100 log_write(0, LOG_MAIN, "%s", big_buffer);
4102 debug_printf("%s\n", big_buffer);
4105 /* Set the working directory to be the top-level spool directory. We don't rely
4106 on this in the code, which always uses fully qualified names, but it's useful
4107 for core dumps etc. Don't complain if it fails - the spool directory might not
4108 be generally accessible and calls with the -C option (and others) have lost
4109 privilege by now. Before the chdir, we try to ensure that the directory exists.
4112 if (Uchdir(spool_directory) != 0)
4115 (void)directory_make(spool_directory, US"", SPOOL_DIRECTORY_MODE, FALSE);
4116 dummy = /* quieten compiler */ Uchdir(spool_directory);
4117 dummy = dummy; /* yet more compiler quietening, sigh */
4120 /* Handle calls with the -bi option. This is a sendmail option to rebuild *the*
4121 alias file. Exim doesn't have such a concept, but this call is screwed into
4122 Sun's YP makefiles. Handle this by calling a configured script, as the real
4123 user who called Exim. The -oA option can be used to pass an argument to the
4128 (void)fclose(config_file);
4133 argv[i++] = bi_command;
4134 if (alias_arg) argv[i++] = alias_arg;
4137 setgroups(group_count, group_list);
4138 exim_setugid(real_uid, real_gid, FALSE, US"running bi_command");
4140 DEBUG(D_exec) debug_printf("exec %.256s %.256s\n", argv[0],
4141 argv[1] ? argv[1] : US"");
4143 execv(CS argv[0], (char *const *)argv);
4144 exim_fail("exim: exec failed: %s\n", strerror(errno));
4148 DEBUG(D_any) debug_printf("-bi used but bi_command not set; exiting\n");
4153 /* We moved the admin/trusted check to be immediately after reading the
4154 configuration file. We leave these prints here to ensure that syslog setup,
4155 logfile setup, and so on has already happened. */
4157 if (f.trusted_caller) DEBUG(D_any) debug_printf("trusted user\n");
4158 if (f.admin_user) DEBUG(D_any) debug_printf("admin user\n");
4160 /* Only an admin user may start the daemon or force a queue run in the default
4161 configuration, but the queue run restriction can be relaxed. Only an admin
4162 user may request that a message be returned to its sender forthwith. Only an
4163 admin user may specify a debug level greater than D_v (because it might show
4164 passwords, etc. in lookup queries). Only an admin user may request a queue
4165 count. Only an admin user can use the test interface to scan for email
4166 (because Exim will be in the spool dir and able to look at mails). */
4170 BOOL debugset = (debug_selector & ~D_v) != 0;
4171 if ( deliver_give_up || f.daemon_listen || malware_test_file
4172 || count_queue && queue_list_requires_admin
4173 || list_queue && queue_list_requires_admin
4174 || queue_interval >= 0 && prod_requires_admin
4175 || queue_name_dest && prod_requires_admin
4176 || debugset && !f.running_in_test_harness
4178 exim_fail("exim:%s permission denied\n", debugset? " debugging" : "");
4181 /* If the real user is not root or the exim uid, the argument for passing
4182 in an open TCP/IP connection for another message is not permitted, nor is
4183 running with the -N option for any delivery action, unless this call to exim is
4184 one that supplied an input message, or we are using a patched exim for
4185 regression testing. */
4187 if (real_uid != root_uid && real_uid != exim_uid &&
4188 (continue_hostname != NULL ||
4190 (queue_interval >= 0 || f.daemon_listen || msg_action_arg > 0)
4191 )) && !f.running_in_test_harness)
4192 exim_fail("exim: Permission denied\n");
4194 /* If the caller is not trusted, certain arguments are ignored when running for
4195 real, but are permitted when checking things (-be, -bv, -bt, -bh, -bf, -bF).
4196 Note that authority for performing certain actions on messages is tested in the
4197 queue_action() function. */
4199 if (!f.trusted_caller && !checking)
4201 sender_host_name = sender_host_address = interface_address =
4202 sender_ident = received_protocol = NULL;
4203 sender_host_port = interface_port = 0;
4204 sender_host_authenticated = authenticated_sender = authenticated_id = NULL;
4207 /* If a sender host address is set, extract the optional port number off the
4208 end of it and check its syntax. Do the same thing for the interface address.
4209 Exim exits if the syntax is bad. */
4213 if (sender_host_address != NULL)
4214 sender_host_port = check_port(sender_host_address);
4215 if (interface_address != NULL)
4216 interface_port = check_port(interface_address);
4219 /* If the caller is trusted, then they can use -G to suppress_local_fixups. */
4222 if (f.trusted_caller)
4224 f.suppress_local_fixups = f.suppress_local_fixups_default = TRUE;
4225 DEBUG(D_acl) debug_printf("suppress_local_fixups forced on by -G\n");
4228 exim_fail("exim: permission denied (-G requires a trusted user)\n");
4231 /* If an SMTP message is being received check to see if the standard input is a
4232 TCP/IP socket. If it is, we assume that Exim was called from inetd if the
4233 caller is root or the Exim user, or if the port is a privileged one. Otherwise,
4238 union sockaddr_46 inetd_sock;
4239 EXIM_SOCKLEN_T size = sizeof(inetd_sock);
4240 if (getpeername(0, (struct sockaddr *)(&inetd_sock), &size) == 0)
4242 int family = ((struct sockaddr *)(&inetd_sock))->sa_family;
4243 if (family == AF_INET || family == AF_INET6)
4245 union sockaddr_46 interface_sock;
4246 size = sizeof(interface_sock);
4248 if (getsockname(0, (struct sockaddr *)(&interface_sock), &size) == 0)
4249 interface_address = host_ntoa(-1, &interface_sock, NULL,
4252 if (host_is_tls_on_connect_port(interface_port)) tls_in.on_connect = TRUE;
4254 if (real_uid == root_uid || real_uid == exim_uid || interface_port < 1024)
4257 sender_host_address = host_ntoa(-1, (struct sockaddr *)(&inetd_sock),
4258 NULL, &sender_host_port);
4259 if (mua_wrapper) log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Input from "
4260 "inetd is not supported when mua_wrapper is set");
4264 "exim: Permission denied (unprivileged user, unprivileged port)\n");
4269 /* If the load average is going to be needed while receiving a message, get it
4270 now for those OS that require the first call to os_getloadavg() to be done as
4271 root. There will be further calls later for each message received. */
4273 #ifdef LOAD_AVG_NEEDS_ROOT
4274 if ( receiving_message
4275 && (queue_only_load >= 0 || (f.is_inetd && smtp_load_reserve >= 0)))
4276 load_average = OS_GETLOADAVG();
4279 /* The queue_only configuration option can be overridden by -odx on the command
4280 line, except that if queue_only_override is false, queue_only cannot be unset
4281 from the command line. */
4283 if (queue_only_set && (queue_only_override || arg_queue_only))
4284 queue_only = arg_queue_only;
4286 /* The receive_timeout and smtp_receive_timeout options can be overridden by
4289 if (arg_receive_timeout >= 0) receive_timeout = arg_receive_timeout;
4290 if (arg_smtp_receive_timeout >= 0)
4291 smtp_receive_timeout = arg_smtp_receive_timeout;
4293 /* If Exim was started with root privilege, unless we have already removed the
4294 root privilege above as a result of -C, -D, -be, -bf or -bF, remove it now
4295 except when starting the daemon or doing some kind of delivery or address
4296 testing (-bt). These are the only cases when root need to be retained. We run
4297 as exim for -bv and -bh. However, if deliver_drop_privilege is set, root is
4298 retained only for starting the daemon. We always do the initgroups() in this
4299 situation (controlled by the TRUE below), in order to be as close as possible
4300 to the state Exim usually runs in. */
4302 if (!unprivileged && /* originally had root AND */
4303 !removed_privilege && /* still got root AND */
4304 !f.daemon_listen && /* not starting the daemon */
4305 queue_interval <= 0 && /* (either kind of daemon) */
4307 deliver_drop_privilege || /* requested unprivileged */
4309 queue_interval < 0 && /* not running the queue */
4310 (msg_action_arg < 0 || /* and */
4311 msg_action != MSG_DELIVER) && /* not delivering and */
4312 (!checking || !f.address_test_mode) /* not address checking */
4314 exim_setugid(exim_uid, exim_gid, TRUE, US"privilege not needed");
4316 /* When we are retaining a privileged uid, we still change to the exim gid. */
4321 DEBUG(D_any) debug_printf("dropping to exim gid; retaining priv uid\n");
4322 rv = setgid(exim_gid);
4323 /* Impact of failure is that some stuff might end up with an incorrect group.
4324 We track this for failures from root, since any attempt to change privilege
4325 by root should succeed and failures should be examined. For non-root,
4326 there's no security risk. For me, it's { exim -bV } on a just-built binary,
4327 no need to complain then. */
4329 if (!(unprivileged || removed_privilege))
4330 exim_fail("exim: changing group failed: %s\n", strerror(errno));
4332 DEBUG(D_any) debug_printf("changing group to %ld failed: %s\n",
4333 (long int)exim_gid, strerror(errno));
4336 /* Handle a request to scan a file for malware */
4337 if (malware_test_file)
4339 #ifdef WITH_CONTENT_SCAN
4341 set_process_info("scanning file for malware");
4342 result = malware_in_file(malware_test_file);
4345 printf("No malware found.\n");
4350 printf("Malware lookup returned non-okay/fail: %d\n", result);
4354 printf("Malware found: %s\n", malware_name);
4356 printf("Malware scan detected malware of unknown name.\n");
4358 printf("Malware scanning not enabled at compile time.\n");
4363 /* Handle a request to list the delivery queue */
4367 set_process_info("listing the queue");
4368 queue_list(list_queue_option, argv + recipients_arg, argc - recipients_arg);
4372 /* Handle a request to count the delivery queue */
4376 set_process_info("counting the queue");
4377 fprintf(stdout, "%u\n", queue_count());
4381 /* Handle actions on specific messages, except for the force delivery and
4382 message load actions, which are done below. Some actions take a whole list of
4383 message ids, which are known to continue up to the end of the arguments. Others
4384 take a single message id and then operate on the recipients list. */
4386 if (msg_action_arg > 0 && msg_action != MSG_DELIVER && msg_action != MSG_LOAD)
4388 int yield = EXIT_SUCCESS;
4389 set_process_info("acting on specified messages");
4391 /* ACL definitions may be needed when removing a message (-Mrm) because
4392 event_action gets expanded */
4394 if (msg_action == MSG_REMOVE)
4397 if (!one_msg_action)
4399 for (i = msg_action_arg; i < argc; i++)
4400 if (!queue_action(argv[i], msg_action, NULL, 0, 0))
4401 yield = EXIT_FAILURE;
4404 case MSG_REMOVE: case MSG_FREEZE: case MSG_THAW: break;
4405 default: printf("\n"); break;
4409 else if (!queue_action(argv[msg_action_arg], msg_action, argv, argc,
4410 recipients_arg)) yield = EXIT_FAILURE;
4414 /* We used to set up here to skip reading the ACL section, on
4415 (msg_action_arg > 0 || (queue_interval == 0 && !f.daemon_listen)
4416 Now, since the intro of the ${acl } expansion, ACL definitions may be
4417 needed in transports so we lost the optimisation. */
4420 #ifdef MEASURE_TIMING
4421 struct timeval t0, diff;
4422 (void)gettimeofday(&t0, NULL);
4427 #ifdef MEASURE_TIMING
4428 report_time_since(&t0, US"readconf_rest (delta)");
4432 /* Handle the -brt option. This is for checking out retry configurations.
4433 The next three arguments are a domain name or a complete address, and
4434 optionally two error numbers. All it does is to call the function that
4435 scans the retry configuration data. */
4437 if (test_retry_arg >= 0)
4439 retry_config *yield;
4440 int basic_errno = 0;
4444 if (test_retry_arg >= argc)
4446 printf("-brt needs a domain or address argument\n");
4447 exim_exit(EXIT_FAILURE);
4449 s1 = argv[test_retry_arg++];
4452 /* If the first argument contains no @ and no . it might be a local user
4453 or it might be a single-component name. Treat as a domain. */
4455 if (Ustrchr(s1, '@') == NULL && Ustrchr(s1, '.') == NULL)
4457 printf("Warning: \"%s\" contains no '@' and no '.' characters. It is "
4458 "being \ntreated as a one-component domain, not as a local part.\n\n",
4462 /* There may be an optional second domain arg. */
4464 if (test_retry_arg < argc && Ustrchr(argv[test_retry_arg], '.') != NULL)
4465 s2 = argv[test_retry_arg++];
4467 /* The final arg is an error name */
4469 if (test_retry_arg < argc)
4471 uschar *ss = argv[test_retry_arg];
4473 readconf_retry_error(ss, ss + Ustrlen(ss), &basic_errno, &more_errno);
4476 printf("%s\n", CS error);
4477 return EXIT_FAILURE;
4480 /* For the {MAIL,RCPT,DATA}_4xx errors, a value of 255 means "any", and a
4481 code > 100 as an error is for matching codes to the decade. Turn them into
4482 a real error code, off the decade. */
4484 if (basic_errno == ERRNO_MAIL4XX ||
4485 basic_errno == ERRNO_RCPT4XX ||
4486 basic_errno == ERRNO_DATA4XX)
4488 int code = (more_errno >> 8) & 255;
4490 more_errno = (more_errno & 0xffff00ff) | (21 << 8);
4491 else if (code > 100)
4492 more_errno = (more_errno & 0xffff00ff) | ((code - 96) << 8);
4496 if (!(yield = retry_find_config(s1, s2, basic_errno, more_errno)))
4497 printf("No retry information found\n");
4500 more_errno = yield->more_errno;
4501 printf("Retry rule: %s ", yield->pattern);
4503 if (yield->basic_errno == ERRNO_EXIMQUOTA)
4505 printf("quota%s%s ",
4506 (more_errno > 0)? "_" : "",
4507 (more_errno > 0)? readconf_printtime(more_errno) : US"");
4509 else if (yield->basic_errno == ECONNREFUSED)
4511 printf("refused%s%s ",
4512 (more_errno > 0)? "_" : "",
4513 (more_errno == 'M')? "MX" :
4514 (more_errno == 'A')? "A" : "");
4516 else if (yield->basic_errno == ETIMEDOUT)
4519 if ((more_errno & RTEF_CTOUT) != 0) printf("_connect");
4521 if (more_errno != 0) printf("_%s",
4522 (more_errno == 'M')? "MX" : "A");
4525 else if (yield->basic_errno == ERRNO_AUTHFAIL)
4526 printf("auth_failed ");
4529 for (retry_rule * r = yield->rules; r; r = r->next)
4531 printf("%c,%s", r->rule, readconf_printtime(r->timeout)); /* Do not */
4532 printf(",%s", readconf_printtime(r->p1)); /* amalgamate */
4538 printf(",%d.", x/1000);
4552 exim_exit(EXIT_SUCCESS);
4555 /* Handle a request to list one or more configuration options */
4556 /* If -n was set, we suppress some information */
4561 set_process_info("listing variables");
4562 if (recipients_arg >= argc)
4563 fail = !readconf_print(US"all", NULL, flag_n);
4564 else for (i = recipients_arg; i < argc; i++)
4567 (Ustrcmp(argv[i], "router") == 0 ||
4568 Ustrcmp(argv[i], "transport") == 0 ||
4569 Ustrcmp(argv[i], "authenticator") == 0 ||
4570 Ustrcmp(argv[i], "macro") == 0 ||
4571 Ustrcmp(argv[i], "environment") == 0))
4573 fail |= !readconf_print(argv[i+1], argv[i], flag_n);
4577 fail = !readconf_print(argv[i], NULL, flag_n);
4579 exim_exit(fail ? EXIT_FAILURE : EXIT_SUCCESS);
4584 set_process_info("listing config");
4585 exim_exit(readconf_print(US"config", NULL, flag_n)
4586 ? EXIT_SUCCESS : EXIT_FAILURE);
4590 /* Initialise subsystems as required. */
4594 /* Handle a request to deliver one or more messages that are already on the
4595 queue. Values of msg_action other than MSG_DELIVER and MSG_LOAD are dealt with
4596 above. MSG_LOAD is handled with -be (which is the only time it applies) below.
4598 Delivery of specific messages is typically used for a small number when
4599 prodding by hand (when the option forced_delivery will be set) or when
4600 re-execing to regain root privilege. Each message delivery must happen in a
4601 separate process, so we fork a process for each one, and run them sequentially
4602 so that debugging output doesn't get intertwined, and to avoid spawning too
4603 many processes if a long list is given. However, don't fork for the last one;
4604 this saves a process in the common case when Exim is called to deliver just one
4607 if (msg_action_arg > 0 && msg_action != MSG_LOAD)
4609 if (prod_requires_admin && !f.admin_user)
4611 fprintf(stderr, "exim: Permission denied\n");
4612 exim_exit(EXIT_FAILURE);
4614 set_process_info("delivering specified messages");
4615 if (deliver_give_up) forced_delivery = f.deliver_force_thaw = TRUE;
4616 for (i = msg_action_arg; i < argc; i++)
4620 /*XXX This use of argv[i] for msg_id should really be tainted, but doing
4621 that runs into a later copy into the untainted global message_id[] */
4623 (void)deliver_message(argv[i], forced_delivery, deliver_give_up);
4624 else if ((pid = exim_fork(US"cmdline-delivery")) == 0)
4626 (void)deliver_message(argv[i], forced_delivery, deliver_give_up);
4627 exim_underbar_exit(EXIT_SUCCESS);
4631 fprintf(stderr, "failed to fork delivery process for %s: %s\n", argv[i],
4633 exim_exit(EXIT_FAILURE);
4637 exim_exit(EXIT_SUCCESS);
4641 /* If only a single queue run is requested, without SMTP listening, we can just
4642 turn into a queue runner, with an optional starting message id. */
4644 if (queue_interval == 0 && !f.daemon_listen)
4646 DEBUG(D_queue_run) debug_printf("Single queue run%s%s%s%s\n",
4647 start_queue_run_id ? US" starting at " : US"",
4648 start_queue_run_id ? start_queue_run_id: US"",
4649 stop_queue_run_id ? US" stopping at " : US"",
4650 stop_queue_run_id ? stop_queue_run_id : US"");
4652 set_process_info("running the '%s' queue (single queue run)", queue_name);
4654 set_process_info("running the queue (single queue run)");
4655 queue_run(start_queue_run_id, stop_queue_run_id, FALSE);
4656 exim_exit(EXIT_SUCCESS);
4660 /* Find the login name of the real user running this process. This is always
4661 needed when receiving a message, because it is written into the spool file. It
4662 may also be used to construct a from: or a sender: header, and in this case we
4663 need the user's full name as well, so save a copy of it, checked for RFC822
4664 syntax and munged if necessary, if it hasn't previously been set by the -F
4665 argument. We may try to get the passwd entry more than once, in case NIS or
4666 other delays are in evidence. Save the home directory for use in filter testing
4671 if ((pw = getpwuid(real_uid)) != NULL)
4673 originator_login = string_copy(US pw->pw_name);
4674 originator_home = string_copy(US pw->pw_dir);
4676 /* If user name has not been set by -F, set it from the passwd entry
4677 unless -f has been used to set the sender address by a trusted user. */
4679 if (!originator_name)
4681 if (!sender_address || (!f.trusted_caller && filter_test == FTEST_NONE))
4683 uschar *name = US pw->pw_gecos;
4684 uschar *amp = Ustrchr(name, '&');
4687 /* Most Unix specify that a '&' character in the gecos field is
4688 replaced by a copy of the login name, and some even specify that
4689 the first character should be upper cased, so that's what we do. */
4694 string_format(buffer, sizeof(buffer), "%.*s%n%s%s",
4695 (int)(amp - name), name, &loffset, originator_login, amp + 1);
4696 buffer[loffset] = toupper(buffer[loffset]);
4700 /* If a pattern for matching the gecos field was supplied, apply
4701 it and then expand the name string. */
4703 if (gecos_pattern && gecos_name)
4706 re = regex_must_compile(gecos_pattern, FALSE, TRUE); /* Use malloc */
4708 if (regex_match_and_setup(re, name, 0, -1))
4710 uschar *new_name = expand_string(gecos_name);
4714 DEBUG(D_receive) debug_printf("user name \"%s\" extracted from "
4715 "gecos field \"%s\"\n", new_name, name);
4718 else DEBUG(D_receive) debug_printf("failed to expand gecos_name string "
4719 "\"%s\": %s\n", gecos_name, expand_string_message);
4721 else DEBUG(D_receive) debug_printf("gecos_pattern \"%s\" did not match "
4722 "gecos field \"%s\"\n", gecos_pattern, name);
4723 store_free((void *)re);
4725 originator_name = string_copy(name);
4728 /* A trusted caller has used -f but not -F */
4730 else originator_name = US"";
4733 /* Break the retry loop */
4738 if (++i > finduser_retries) break;
4742 /* If we cannot get a user login, log the incident and give up, unless the
4743 configuration specifies something to use. When running in the test harness,
4744 any setting of unknown_login overrides the actual name. */
4746 if (originator_login == NULL || f.running_in_test_harness)
4748 if (unknown_login != NULL)
4750 originator_login = expand_string(unknown_login);
4751 if (originator_name == NULL && unknown_username != NULL)
4752 originator_name = expand_string(unknown_username);
4753 if (originator_name == NULL) originator_name = US"";
4755 if (originator_login == NULL)
4756 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Failed to get user name for uid %d",
4760 /* Ensure that the user name is in a suitable form for use as a "phrase" in an
4763 originator_name = string_copy(parse_fix_phrase(originator_name,
4764 Ustrlen(originator_name), big_buffer, big_buffer_size));
4766 /* If a message is created by this call of Exim, the uid/gid of its originator
4767 are those of the caller. These values are overridden if an existing message is
4768 read in from the spool. */
4770 originator_uid = real_uid;
4771 originator_gid = real_gid;
4773 DEBUG(D_receive) debug_printf("originator: uid=%d gid=%d login=%s name=%s\n",
4774 (int)originator_uid, (int)originator_gid, originator_login, originator_name);
4776 /* Run in daemon and/or queue-running mode. The function daemon_go() never
4777 returns. We leave this till here so that the originator_ fields are available
4778 for incoming messages via the daemon. The daemon cannot be run in mua_wrapper
4781 if (f.daemon_listen || f.inetd_wait_mode || queue_interval > 0)
4785 fprintf(stderr, "Daemon cannot be run when mua_wrapper is set\n");
4786 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Daemon cannot be run when "
4787 "mua_wrapper is set");
4790 # ifndef DISABLE_TLS
4791 /* This also checks that the library linkage is working and we can call
4792 routines in it, so call even if tls_require_ciphers is unset */
4794 # ifdef MEASURE_TIMING
4795 struct timeval t0, diff;
4796 (void)gettimeofday(&t0, NULL);
4798 if (!tls_dropprivs_validate_require_cipher(FALSE))
4800 # ifdef MEASURE_TIMING
4801 report_time_since(&t0, US"validate_ciphers (delta)");
4809 /* If the sender ident has not been set (by a trusted caller) set it to
4810 the caller. This will get overwritten below for an inetd call. If a trusted
4811 caller has set it empty, unset it. */
4813 if (!sender_ident) sender_ident = originator_login;
4814 else if (!*sender_ident) sender_ident = NULL;
4816 /* Handle the -brw option, which is for checking out rewriting rules. Cause log
4817 writes (on errors) to go to stderr instead. Can't do this earlier, as want the
4818 originator_* variables set. */
4820 if (test_rewrite_arg >= 0)
4822 f.really_exim = FALSE;
4823 if (test_rewrite_arg >= argc)
4825 printf("-brw needs an address argument\n");
4826 exim_exit(EXIT_FAILURE);
4828 rewrite_test(argv[test_rewrite_arg]);
4829 exim_exit(EXIT_SUCCESS);
4832 /* A locally-supplied message is considered to be coming from a local user
4833 unless a trusted caller supplies a sender address with -f, or is passing in the
4834 message via SMTP (inetd invocation or otherwise). */
4836 if ( !sender_address && !smtp_input
4837 || !f.trusted_caller && filter_test == FTEST_NONE)
4839 f.sender_local = TRUE;
4841 /* A trusted caller can supply authenticated_sender and authenticated_id
4842 via -oMas and -oMai and if so, they will already be set. Otherwise, force
4843 defaults except when host checking. */
4845 if (!authenticated_sender && !host_checking)
4846 authenticated_sender = string_sprintf("%s@%s", originator_login,
4847 qualify_domain_sender);
4848 if (!authenticated_id && !host_checking)
4849 authenticated_id = originator_login;
4852 /* Trusted callers are always permitted to specify the sender address.
4853 Untrusted callers may specify it if it matches untrusted_set_sender, or if what
4854 is specified is the empty address. However, if a trusted caller does not
4855 specify a sender address for SMTP input, we leave sender_address unset. This
4856 causes the MAIL commands to be honoured. */
4858 if ( !smtp_input && !sender_address
4859 || !receive_check_set_sender(sender_address))
4861 /* Either the caller is not permitted to set a general sender, or this is
4862 non-SMTP input and the trusted caller has not set a sender. If there is no
4863 sender, or if a sender other than <> is set, override with the originator's
4864 login (which will get qualified below), except when checking things. */
4866 if (sender_address == NULL /* No sender_address set */
4868 (sender_address[0] != 0 && /* Non-empty sender address, AND */
4869 !checking)) /* Not running tests, including filter tests */
4871 sender_address = originator_login;
4872 f.sender_address_forced = FALSE;
4873 sender_address_domain = 0;
4877 /* Remember whether an untrusted caller set the sender address */
4879 f.sender_set_untrusted = sender_address != originator_login && !f.trusted_caller;
4881 /* Ensure that the sender address is fully qualified unless it is the empty
4882 address, which indicates an error message, or doesn't exist (root caller, smtp
4883 interface, no -f argument). */
4885 if (sender_address && *sender_address && sender_address_domain == 0)
4886 sender_address = string_sprintf("%s@%s", local_part_quote(sender_address),
4887 qualify_domain_sender);
4889 DEBUG(D_receive) debug_printf("sender address = %s\n", sender_address);
4891 /* Handle a request to verify a list of addresses, or test them for delivery.
4892 This must follow the setting of the sender address, since routers can be
4893 predicated upon the sender. If no arguments are given, read addresses from
4894 stdin. Set debug_level to at least D_v to get full output for address testing.
4897 if (verify_address_mode || f.address_test_mode)
4900 int flags = vopt_qualify;
4902 if (verify_address_mode)
4904 if (!verify_as_sender) flags |= vopt_is_recipient;
4905 DEBUG(D_verify) debug_print_ids(US"Verifying:");
4910 flags |= vopt_is_recipient;
4911 debug_selector |= D_v;
4912 debug_file = stderr;
4913 debug_fd = fileno(debug_file);
4914 DEBUG(D_verify) debug_print_ids(US"Address testing:");
4917 if (recipients_arg < argc)
4919 while (recipients_arg < argc)
4921 /* Supplied addresses are tainted since they come from a user */
4922 uschar * s = string_copy_taint(argv[recipients_arg++], TRUE);
4925 BOOL finished = FALSE;
4926 uschar *ss = parse_find_address_end(s, FALSE);
4927 if (*ss == ',') *ss = 0; else finished = TRUE;
4928 test_address(s, flags, &exit_value);
4931 while (*++s == ',' || isspace(*s)) ;
4938 uschar * s = get_stdinput(NULL, NULL);
4940 test_address(string_copy_taint(s, TRUE), flags, &exit_value);
4944 exim_exit(exit_value);
4947 /* Handle expansion checking. Either expand items on the command line, or read
4948 from stdin if there aren't any. If -Mset was specified, load the message so
4949 that its variables can be used, but restrict this facility to admin users.
4950 Otherwise, if -bem was used, read a message from stdin. */
4954 dns_init(FALSE, FALSE, FALSE);
4955 if (msg_action_arg > 0 && msg_action == MSG_LOAD)
4957 uschar spoolname[256]; /* Not big_buffer; used in spool_read_header() */
4959 exim_fail("exim: permission denied\n");
4960 message_id = argv[msg_action_arg];
4961 (void)string_format(spoolname, sizeof(spoolname), "%s-H", message_id);
4962 if ((deliver_datafile = spool_open_datafile(message_id)) < 0)
4963 printf ("Failed to load message datafile %s\n", message_id);
4964 if (spool_read_header(spoolname, TRUE, FALSE) != spool_read_OK)
4965 printf ("Failed to load message %s\n", message_id);
4968 /* Read a test message from a file. We fudge it up to be on stdin, saving
4969 stdin itself for later reading of expansion strings. */
4971 else if (expansion_test_message)
4973 int save_stdin = dup(0);
4974 int fd = Uopen(expansion_test_message, O_RDONLY, 0);
4976 exim_fail("exim: failed to open %s: %s\n", expansion_test_message,
4979 filter_test = FTEST_USER; /* Fudge to make it look like filter test */
4980 message_ended = END_NOTENDED;
4981 read_message_body(receive_msg(extract_recipients));
4982 message_linecount += body_linecount;
4983 (void)dup2(save_stdin, 0);
4984 (void)close(save_stdin);
4985 clearerr(stdin); /* Required by Darwin */
4988 /* Only admin users may see config-file macros this way */
4990 if (!f.admin_user) macros_user = macros = mlast = NULL;
4992 /* Allow $recipients for this testing */
4994 f.enable_dollar_recipients = TRUE;
4996 /* Expand command line items */
4998 if (recipients_arg < argc)
4999 while (recipients_arg < argc)
5000 expansion_test_line(argv[recipients_arg++]);
5006 char *(*fn_readline)(const char *) = NULL;
5007 void (*fn_addhist)(const char *) = NULL;
5011 void *dlhandle = set_readline(&fn_readline, &fn_addhist);
5014 while (s = get_stdinput(fn_readline, fn_addhist))
5015 expansion_test_line(s);
5018 if (dlhandle) dlclose(dlhandle);
5022 /* The data file will be open after -Mset */
5024 if (deliver_datafile >= 0)
5026 (void)close(deliver_datafile);
5027 deliver_datafile = -1;
5030 exim_exit(EXIT_SUCCESS);
5034 /* The active host name is normally the primary host name, but it can be varied
5035 for hosts that want to play several parts at once. We need to ensure that it is
5036 set for host checking, and for receiving messages. */
5038 smtp_active_hostname = primary_hostname;
5039 if (raw_active_hostname != NULL)
5041 uschar *nah = expand_string(raw_active_hostname);
5044 if (!f.expand_string_forcedfail)
5045 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to expand \"%s\" "
5046 "(smtp_active_hostname): %s", raw_active_hostname,
5047 expand_string_message);
5049 else if (nah[0] != 0) smtp_active_hostname = nah;
5052 /* Handle host checking: this facility mocks up an incoming SMTP call from a
5053 given IP address so that the blocking and relay configuration can be tested.
5054 Unless a sender_ident was set by -oMt, we discard it (the default is the
5055 caller's login name). An RFC 1413 call is made only if we are running in the
5056 test harness and an incoming interface and both ports are specified, because
5057 there is no TCP/IP call to find the ident for. */
5064 if (!sender_ident_set)
5066 sender_ident = NULL;
5067 if (f.running_in_test_harness && sender_host_port
5068 && interface_address && interface_port)
5069 verify_get_ident(1223); /* note hardwired port number */
5072 /* In case the given address is a non-canonical IPv6 address, canonicalize
5073 it. The code works for both IPv4 and IPv6, as it happens. */
5075 size = host_aton(sender_host_address, x);
5076 sender_host_address = store_get(48, FALSE); /* large enough for full IPv6 */
5077 (void)host_nmtoa(size, x, -1, sender_host_address, ':');
5079 /* Now set up for testing */
5081 host_build_sender_fullhost();
5085 f.sender_local = FALSE;
5086 f.sender_host_notsocket = TRUE;
5087 debug_file = stderr;
5088 debug_fd = fileno(debug_file);
5089 fprintf(stdout, "\n**** SMTP testing session as if from host %s\n"
5090 "**** but without any ident (RFC 1413) callback.\n"
5091 "**** This is not for real!\n\n",
5092 sender_host_address);
5094 memset(sender_host_cache, 0, sizeof(sender_host_cache));
5095 if (verify_check_host(&hosts_connection_nolog) == OK)
5096 BIT_CLEAR(log_selector, log_selector_size, Li_smtp_connection);
5097 log_write(L_smtp_connection, LOG_MAIN, "%s", smtp_get_connection_info());
5099 /* NOTE: We do *not* call smtp_log_no_mail() if smtp_start_session() fails,
5100 because a log line has already been written for all its failure exists
5101 (usually "connection refused: <reason>") and writing another one is
5102 unnecessary clutter. */
5104 if (smtp_start_session())
5107 for (; (reset_point = store_mark()); store_reset(reset_point))
5109 if (smtp_setup_msg() <= 0) break;
5110 if (!receive_msg(FALSE)) break;
5112 return_path = sender_address = NULL;
5113 dnslist_domain = dnslist_matched = NULL;
5114 #ifndef DISABLE_DKIM
5115 dkim_cur_signer = NULL;
5118 deliver_localpart_orig = NULL;
5119 deliver_domain_orig = NULL;
5120 callout_address = sending_ip_address = NULL;
5121 deliver_localpart_data = deliver_domain_data =
5122 recipient_data = sender_data = NULL;
5123 sender_rate = sender_rate_limit = sender_rate_period = NULL;
5127 exim_exit(EXIT_SUCCESS);
5131 /* Arrange for message reception if recipients or SMTP were specified;
5132 otherwise complain unless a version print (-bV) happened or this is a filter
5133 verification test or info dump.
5134 In the former case, show the configuration file name. */
5136 if (recipients_arg >= argc && !extract_recipients && !smtp_input)
5138 if (version_printed)
5140 if (Ustrchr(config_main_filelist, ':'))
5141 printf("Configuration file search path is %s\n", config_main_filelist);
5142 printf("Configuration file is %s\n", config_main_filename);
5143 return EXIT_SUCCESS;
5146 if (info_flag != CMDINFO_NONE)
5148 show_exim_information(info_flag, info_stdout ? stdout : stderr);
5149 return info_stdout ? EXIT_SUCCESS : EXIT_FAILURE;
5152 if (filter_test == FTEST_NONE)
5153 exim_usage(called_as);
5157 /* If mua_wrapper is set, Exim is being used to turn an MUA that submits on the
5158 standard input into an MUA that submits to a smarthost over TCP/IP. We know
5159 that we are not called from inetd, because that is rejected above. The
5160 following configuration settings are forced here:
5162 (1) Synchronous delivery (-odi)
5163 (2) Errors to stderr (-oep == -oeq)
5164 (3) No parallel remote delivery
5165 (4) Unprivileged delivery
5167 We don't force overall queueing options because there are several of them;
5168 instead, queueing is avoided below when mua_wrapper is set. However, we do need
5169 to override any SMTP queueing. */
5173 f.synchronous_delivery = TRUE;
5174 arg_error_handling = ERRORS_STDERR;
5175 remote_max_parallel = 1;
5176 deliver_drop_privilege = TRUE;
5177 f.queue_smtp = FALSE;
5178 queue_smtp_domains = NULL;
5180 message_utf8_downconvert = -1; /* convert-if-needed */
5185 /* Prepare to accept one or more new messages on the standard input. When a
5186 message has been read, its id is returned in message_id[]. If doing immediate
5187 delivery, we fork a delivery process for each received message, except for the
5188 last one, where we can save a process switch.
5190 It is only in non-smtp mode that error_handling is allowed to be changed from
5191 its default of ERRORS_SENDER by argument. (Idle thought: are any of the
5192 sendmail error modes other than -oem ever actually used? Later: yes.) */
5194 if (!smtp_input) error_handling = arg_error_handling;
5196 /* If this is an inetd call, ensure that stderr is closed to prevent panic
5197 logging being sent down the socket and make an identd call to get the
5200 else if (f.is_inetd)
5202 (void)fclose(stderr);
5203 exim_nullstd(); /* Re-open to /dev/null */
5204 verify_get_ident(IDENT_PORT);
5205 host_build_sender_fullhost();
5206 set_process_info("handling incoming connection from %s via inetd",
5210 /* If the sender host address has been set, build sender_fullhost if it hasn't
5211 already been done (which it will have been for inetd). This caters for the
5212 case when it is forced by -oMa. However, we must flag that it isn't a socket,
5213 so that the test for IP options is skipped for -bs input. */
5215 if (sender_host_address && !sender_fullhost)
5217 host_build_sender_fullhost();
5218 set_process_info("handling incoming connection from %s via -oMa",
5220 f.sender_host_notsocket = TRUE;
5223 /* Otherwise, set the sender host as unknown except for inetd calls. This
5224 prevents host checking in the case of -bs not from inetd and also for -bS. */
5226 else if (!f.is_inetd) f.sender_host_unknown = TRUE;
5228 /* If stdout does not exist, then dup stdin to stdout. This can happen
5229 if exim is started from inetd. In this case fd 0 will be set to the socket,
5230 but fd 1 will not be set. This also happens for passed SMTP channels. */
5232 if (fstat(1, &statbuf) < 0) (void)dup2(0, 1);
5234 /* Set up the incoming protocol name and the state of the program. Root is
5235 allowed to force received protocol via the -oMr option above. If we have come
5236 via inetd, the process info has already been set up. We don't set
5237 received_protocol here for smtp input, as it varies according to
5238 batch/HELO/EHLO/AUTH/TLS. */
5242 if (!f.is_inetd) set_process_info("accepting a local %sSMTP message from <%s>",
5243 smtp_batched_input? "batched " : "",
5244 (sender_address!= NULL)? sender_address : originator_login);
5248 int old_pool = store_pool;
5249 store_pool = POOL_PERM;
5250 if (!received_protocol)
5251 received_protocol = string_sprintf("local%s", called_as);
5252 store_pool = old_pool;
5253 set_process_info("accepting a local non-SMTP message from <%s>",
5257 /* Initialize the session_local_queue-only flag (this will be ignored if
5258 mua_wrapper is set) */
5261 session_local_queue_only = queue_only;
5263 /* For non-SMTP and for batched SMTP input, check that there is enough space on
5264 the spool if so configured. On failure, we must not attempt to send an error
5265 message! (For interactive SMTP, the check happens at MAIL FROM and an SMTP
5266 error code is given.) */
5268 if ((!smtp_input || smtp_batched_input) && !receive_check_fs(0))
5269 exim_fail("exim: insufficient disk space\n");
5271 /* If this is smtp input of any kind, real or batched, handle the start of the
5274 NOTE: We do *not* call smtp_log_no_mail() if smtp_start_session() fails,
5275 because a log line has already been written for all its failure exists
5276 (usually "connection refused: <reason>") and writing another one is
5277 unnecessary clutter. */
5283 memset(sender_host_cache, 0, sizeof(sender_host_cache));
5284 if (verify_check_host(&hosts_connection_nolog) == OK)
5285 BIT_CLEAR(log_selector, log_selector_size, Li_smtp_connection);
5286 log_write(L_smtp_connection, LOG_MAIN, "%s", smtp_get_connection_info());
5287 if (!smtp_start_session())
5290 exim_exit(EXIT_SUCCESS);
5294 /* Otherwise, set up the input size limit here. */
5298 thismessage_size_limit = expand_string_integer(message_size_limit, TRUE);
5299 if (expand_string_message)
5300 if (thismessage_size_limit == -1)
5301 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to expand "
5302 "message_size_limit: %s", expand_string_message);
5304 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "invalid value for "
5305 "message_size_limit: %s", expand_string_message);
5308 /* Loop for several messages when reading SMTP input. If we fork any child
5309 processes, we don't want to wait for them unless synchronous delivery is
5310 requested, so set SIGCHLD to SIG_IGN in that case. This is not necessarily the
5311 same as SIG_DFL, despite the fact that documentation often lists the default as
5312 "ignore". This is a confusing area. This is what I know:
5314 At least on some systems (e.g. Solaris), just setting SIG_IGN causes child
5315 processes that complete simply to go away without ever becoming defunct. You
5316 can't then wait for them - but we don't want to wait for them in the
5317 non-synchronous delivery case. However, this behaviour of SIG_IGN doesn't
5318 happen for all OS (e.g. *BSD is different).
5320 But that's not the end of the story. Some (many? all?) systems have the
5321 SA_NOCLDWAIT option for sigaction(). This requests the behaviour that Solaris
5322 has by default, so it seems that the difference is merely one of default
5323 (compare restarting vs non-restarting signals).
5325 To cover all cases, Exim sets SIG_IGN with SA_NOCLDWAIT here if it can. If not,
5326 it just sets SIG_IGN. To be on the safe side it also calls waitpid() at the end
5327 of the loop below. Paranoia rules.
5329 February 2003: That's *still* not the end of the story. There are now versions
5330 of Linux (where SIG_IGN does work) that are picky. If, having set SIG_IGN, a
5331 process then calls waitpid(), a grumble is written to the system log, because
5332 this is logically inconsistent. In other words, it doesn't like the paranoia.
5333 As a consequence of this, the waitpid() below is now excluded if we are sure
5334 that SIG_IGN works. */
5336 if (!f.synchronous_delivery)
5339 struct sigaction act;
5340 act.sa_handler = SIG_IGN;
5341 sigemptyset(&(act.sa_mask));
5342 act.sa_flags = SA_NOCLDWAIT;
5343 sigaction(SIGCHLD, &act, NULL);
5345 signal(SIGCHLD, SIG_IGN);
5349 /* Save the current store pool point, for resetting at the start of
5350 each message, and save the real sender address, if any. */
5352 real_sender_address = sender_address;
5354 /* Loop to receive messages; receive_msg() returns TRUE if there are more
5355 messages to be read (SMTP input), or FALSE otherwise (not SMTP, or SMTP channel
5360 rmark reset_point = store_mark();
5363 /* Handle the SMTP case; call smtp_setup_mst() to deal with the initial SMTP
5364 input and build the recipients list, before calling receive_msg() to read the
5365 message proper. Whatever sender address is given in the SMTP transaction is
5366 often ignored for local senders - we use the actual sender, which is normally
5367 either the underlying user running this process or a -f argument provided by
5368 a trusted caller. It is saved in real_sender_address. The test for whether to
5369 accept the SMTP sender is encapsulated in receive_check_set_sender(). */
5374 if ((rc = smtp_setup_msg()) > 0)
5376 if (real_sender_address != NULL &&
5377 !receive_check_set_sender(sender_address))
5379 sender_address = raw_sender = real_sender_address;
5380 sender_address_unrewritten = NULL;
5383 /* For batched SMTP, we have to run the acl_not_smtp_start ACL, since it
5384 isn't really SMTP, so no other ACL will run until the acl_not_smtp one at
5385 the very end. The result of the ACL is ignored (as for other non-SMTP
5386 messages). It is run for its potential side effects. */
5388 if (smtp_batched_input && acl_not_smtp_start != NULL)
5390 uschar *user_msg, *log_msg;
5391 f.enable_dollar_recipients = TRUE;
5392 (void)acl_check(ACL_WHERE_NOTSMTP_START, NULL, acl_not_smtp_start,
5393 &user_msg, &log_msg);
5394 f.enable_dollar_recipients = FALSE;
5397 /* Now get the data for the message */
5399 more = receive_msg(extract_recipients);
5400 if (message_id[0] == 0)
5402 cancel_cutthrough_connection(TRUE, US"receive dropped");
5403 if (more) goto moreloop;
5404 smtp_log_no_mail(); /* Log no mail if configured */
5405 exim_exit(EXIT_FAILURE);
5410 cancel_cutthrough_connection(TRUE, US"message setup dropped");
5411 smtp_log_no_mail(); /* Log no mail if configured */
5412 exim_exit(rc ? EXIT_FAILURE : EXIT_SUCCESS);
5416 /* In the non-SMTP case, we have all the information from the command
5417 line, but must process it in case it is in the more general RFC822
5418 format, and in any case, to detect syntax errors. Also, it appears that
5419 the use of comma-separated lists as single arguments is common, so we
5420 had better support them. */
5425 int count = argc - recipients_arg;
5426 uschar **list = argv + recipients_arg;
5428 /* These options cannot be changed dynamically for non-SMTP messages */
5430 f.active_local_sender_retain = local_sender_retain;
5431 f.active_local_from_check = local_from_check;
5433 /* Save before any rewriting */
5435 raw_sender = string_copy(sender_address);
5437 /* Loop for each argument (supplied by user hence tainted) */
5439 for (int i = 0; i < count; i++)
5441 int start, end, domain;
5443 uschar * s = string_copy_taint(list[i], TRUE);
5445 /* Loop for each comma-separated address */
5449 BOOL finished = FALSE;
5451 uschar *ss = parse_find_address_end(s, FALSE);
5453 if (*ss == ',') *ss = 0; else finished = TRUE;
5455 /* Check max recipients - if -t was used, these aren't recipients */
5457 if (recipients_max > 0 && ++rcount > recipients_max &&
5458 !extract_recipients)
5459 if (error_handling == ERRORS_STDERR)
5461 fprintf(stderr, "exim: too many recipients\n");
5462 exim_exit(EXIT_FAILURE);
5466 moan_to_sender(ERRMESS_TOOMANYRECIP, NULL, NULL, stdin, TRUE)?
5467 errors_sender_rc : EXIT_FAILURE;
5471 BOOL b = allow_utf8_domains;
5472 allow_utf8_domains = TRUE;
5475 parse_extract_address(s, &errmess, &start, &end, &domain, FALSE);
5478 if (string_is_utf8(recipient))
5479 message_smtputf8 = TRUE;
5481 allow_utf8_domains = b;
5484 if (domain == 0 && !f.allow_unqualified_recipient)
5487 errmess = US"unqualified recipient address not allowed";
5491 if (error_handling == ERRORS_STDERR)
5493 fprintf(stderr, "exim: bad recipient address \"%s\": %s\n",
5494 string_printing(list[i]), errmess);
5495 exim_exit(EXIT_FAILURE);
5501 eblock.text1 = string_printing(list[i]);
5502 eblock.text2 = errmess;
5504 moan_to_sender(ERRMESS_BADARGADDRESS, &eblock, NULL, stdin, TRUE)?
5505 errors_sender_rc : EXIT_FAILURE;
5508 receive_add_recipient(string_copy_taint(recipient, TRUE), -1);
5511 while (*(++s) != 0 && (*s == ',' || isspace(*s)));
5515 /* Show the recipients when debugging */
5519 if (sender_address) debug_printf("Sender: %s\n", sender_address);
5520 if (recipients_list)
5522 debug_printf("Recipients:\n");
5523 for (int i = 0; i < recipients_count; i++)
5524 debug_printf(" %s\n", recipients_list[i].address);
5528 /* Run the acl_not_smtp_start ACL if required. The result of the ACL is
5529 ignored; rejecting here would just add complication, and it can just as
5530 well be done later. Allow $recipients to be visible in the ACL. */
5532 if (acl_not_smtp_start)
5534 uschar *user_msg, *log_msg;
5535 f.enable_dollar_recipients = TRUE;
5536 (void)acl_check(ACL_WHERE_NOTSMTP_START, NULL, acl_not_smtp_start,
5537 &user_msg, &log_msg);
5538 f.enable_dollar_recipients = FALSE;
5541 /* Pause for a while waiting for input. If none received in that time,
5542 close the logfile, if we had one open; then if we wait for a long-running
5543 datasource (months, in one use-case) log rotation will not leave us holding
5546 if (!receive_timeout)
5548 struct timeval t = { .tv_sec = 30*60, .tv_usec = 0 }; /* 30 minutes */
5551 FD_ZERO(&r); FD_SET(0, &r);
5552 if (select(1, &r, NULL, NULL, &t) == 0) mainlog_close();
5555 /* Read the data for the message. If filter_test is not FTEST_NONE, this
5556 will just read the headers for the message, and not write anything onto the
5559 message_ended = END_NOTENDED;
5560 more = receive_msg(extract_recipients);
5562 /* more is always FALSE here (not SMTP message) when reading a message
5563 for real; when reading the headers of a message for filter testing,
5564 it is TRUE if the headers were terminated by '.' and FALSE otherwise. */
5566 if (message_id[0] == 0) exim_exit(EXIT_FAILURE);
5567 } /* Non-SMTP message reception */
5569 /* If this is a filter testing run, there are headers in store, but
5570 no message on the spool. Run the filtering code in testing mode, setting
5571 the domain to the qualify domain and the local part to the current user,
5572 unless they have been set by options. The prefix and suffix are left unset
5573 unless specified. The the return path is set to to the sender unless it has
5574 already been set from a return-path header in the message. */
5576 if (filter_test != FTEST_NONE)
5578 deliver_domain = ftest_domain ? ftest_domain : qualify_domain_recipient;
5579 deliver_domain_orig = deliver_domain;
5580 deliver_localpart = ftest_localpart ? ftest_localpart : originator_login;
5581 deliver_localpart_orig = deliver_localpart;
5582 deliver_localpart_prefix = ftest_prefix;
5583 deliver_localpart_suffix = ftest_suffix;
5584 deliver_home = originator_home;
5588 printf("Return-path copied from sender\n");
5589 return_path = string_copy(sender_address);
5592 printf("Return-path = %s\n", (return_path[0] == 0)? US"<>" : return_path);
5593 printf("Sender = %s\n", (sender_address[0] == 0)? US"<>" : sender_address);
5595 receive_add_recipient(
5596 string_sprintf("%s%s%s@%s",
5597 ftest_prefix ? ftest_prefix : US"",
5599 ftest_suffix ? ftest_suffix : US"",
5600 deliver_domain), -1);
5602 printf("Recipient = %s\n", recipients_list[0].address);
5603 if (ftest_prefix) printf("Prefix = %s\n", ftest_prefix);
5604 if (ftest_suffix) printf("Suffix = %s\n", ftest_suffix);
5606 if (chdir("/")) /* Get away from wherever the user is running this from */
5608 DEBUG(D_receive) debug_printf("chdir(\"/\") failed\n");
5609 exim_exit(EXIT_FAILURE);
5612 /* Now we run either a system filter test, or a user filter test, or both.
5613 In the latter case, headers added by the system filter will persist and be
5614 available to the user filter. We need to copy the filter variables
5617 if (filter_test & FTEST_SYSTEM)
5618 if (!filter_runtest(filter_sfd, filter_test_sfile, TRUE, more))
5619 exim_exit(EXIT_FAILURE);
5621 memcpy(filter_sn, filter_n, sizeof(filter_sn));
5623 if (filter_test & FTEST_USER)
5624 if (!filter_runtest(filter_ufd, filter_test_ufile, FALSE, more))
5625 exim_exit(EXIT_FAILURE);
5627 exim_exit(EXIT_SUCCESS);
5630 /* Else act on the result of message reception. We should not get here unless
5631 message_id[0] is non-zero. If queue_only is set, session_local_queue_only
5632 will be TRUE. If it is not, check on the number of messages received in this
5635 if ( !session_local_queue_only
5636 && smtp_accept_queue_per_connection > 0
5637 && receive_messagecount > smtp_accept_queue_per_connection)
5639 session_local_queue_only = TRUE;
5640 queue_only_reason = 2;
5643 /* Initialize local_queue_only from session_local_queue_only. If it is false,
5644 and queue_only_load is set, check that the load average is below it. If it is
5645 not, set local_queue_only TRUE. If queue_only_load_latch is true (the
5646 default), we put the whole session into queue_only mode. It then remains this
5647 way for any subsequent messages on the same SMTP connection. This is a
5648 deliberate choice; even though the load average may fall, it doesn't seem
5649 right to deliver later messages on the same call when not delivering earlier
5650 ones. However, there are odd cases where this is not wanted, so this can be
5651 changed by setting queue_only_load_latch false. */
5653 if (!(local_queue_only = session_local_queue_only) && queue_only_load >= 0)
5654 if ((local_queue_only = (load_average = OS_GETLOADAVG()) > queue_only_load))
5656 queue_only_reason = 3;
5657 if (queue_only_load_latch) session_local_queue_only = TRUE;
5660 /* If running as an MUA wrapper, all queueing options and freezing options
5664 local_queue_only = f.queue_only_policy = f.deliver_freeze = FALSE;
5666 /* Log the queueing here, when it will get a message id attached, but
5667 not if queue_only is set (case 0). Case 1 doesn't happen here (too many
5670 if (local_queue_only)
5672 cancel_cutthrough_connection(TRUE, US"no delivery; queueing");
5673 switch(queue_only_reason)
5676 log_write(L_delay_delivery,
5677 LOG_MAIN, "no immediate delivery: more than %d messages "
5678 "received in one connection", smtp_accept_queue_per_connection);
5682 log_write(L_delay_delivery,
5683 LOG_MAIN, "no immediate delivery: load average %.2f",
5684 (double)load_average/1000.0);
5689 else if (f.queue_only_policy || f.deliver_freeze)
5690 cancel_cutthrough_connection(TRUE, US"no delivery; queueing");
5692 /* Else do the delivery unless the ACL or local_scan() called for queue only
5693 or froze the message. Always deliver in a separate process. A fork failure is
5694 not a disaster, as the delivery will eventually happen on a subsequent queue
5695 run. The search cache must be tidied before the fork, as the parent will
5696 do it before exiting. The child will trigger a lookup failure and
5697 thereby defer the delivery if it tries to use (for example) a cached ldap
5698 connection that the parent has called unbind on. */
5705 if ((pid = exim_fork(US"local-accept-delivery")) == 0)
5708 close_unwanted(); /* Close unwanted file descriptors and TLS */
5709 exim_nullstd(); /* Ensure std{in,out,err} exist */
5711 /* Re-exec Exim if we need to regain privilege (note: in mua_wrapper
5712 mode, deliver_drop_privilege is forced TRUE). */
5714 if (geteuid() != root_uid && !deliver_drop_privilege && !unprivileged)
5716 delivery_re_exec(CEE_EXEC_EXIT);
5717 /* Control does not return here. */
5720 /* No need to re-exec */
5722 rc = deliver_message(message_id, FALSE, FALSE);
5724 exim_underbar_exit(!mua_wrapper || rc == DELIVER_MUA_SUCCEEDED
5725 ? EXIT_SUCCESS : EXIT_FAILURE);
5730 cancel_cutthrough_connection(TRUE, US"delivery fork failed");
5731 log_write(0, LOG_MAIN|LOG_PANIC, "failed to fork automatic delivery "
5732 "process: %s", strerror(errno));
5736 release_cutthrough_connection(US"msg passed for delivery");
5738 /* In the parent, wait if synchronous delivery is required. This will
5739 always be the case in MUA wrapper mode. */
5741 if (f.synchronous_delivery)
5744 while (wait(&status) != pid);
5745 if ((status & 0x00ff) != 0)
5746 log_write(0, LOG_MAIN|LOG_PANIC,
5747 "process %d crashed with signal %d while delivering %s",
5748 (int)pid, status & 0x00ff, message_id);
5749 if (mua_wrapper && (status & 0xffff) != 0) exim_exit(EXIT_FAILURE);
5754 /* The loop will repeat if more is TRUE. If we do not know know that the OS
5755 automatically reaps children (see comments above the loop), clear away any
5756 finished subprocesses here, in case there are lots of messages coming in
5757 from the same source. */
5759 #ifndef SIG_IGN_WORKS
5760 while (waitpid(-1, NULL, WNOHANG) > 0);
5764 return_path = sender_address = NULL;
5765 authenticated_sender = NULL;
5766 deliver_localpart_orig = NULL;
5767 deliver_domain_orig = NULL;
5768 deliver_host = deliver_host_address = NULL;
5769 dnslist_domain = dnslist_matched = NULL;
5770 #ifdef WITH_CONTENT_SCAN
5771 malware_name = NULL;
5773 callout_address = NULL;
5774 sending_ip_address = NULL;
5775 deliver_localpart_data = deliver_domain_data =
5776 recipient_data = sender_data = NULL;
5778 for(int i = 0; i < REGEX_VARS; i++) regex_vars[i] = NULL;
5780 store_reset(reset_point);
5783 exim_exit(EXIT_SUCCESS); /* Never returns */
5784 return 0; /* To stop compiler warning */