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 # ifdef CLOCK_BOOTTIME
388 # define EXIM_CLOCKTYPE CLOCK_BOOTTIME
390 # define EXIM_CLOCKTYPE CLOCK_MONOTONIC
393 /* Amount EXIM_CLOCK is behind realtime, at startup. */
394 static struct timespec offset_ts;
397 exim_clock_init(void)
400 if (clock_gettime(EXIM_CLOCKTYPE, &offset_ts) != 0) return;
401 (void)gettimeofday(&tv, NULL);
402 offset_ts.tv_sec = tv.tv_sec - offset_ts.tv_sec;
403 offset_ts.tv_nsec = tv.tv_usec * 1000 - offset_ts.tv_nsec;
404 if (offset_ts.tv_nsec >= 0) return;
406 offset_ts.tv_nsec += 1000*1000*1000;
412 exim_gettime(struct timeval * tv)
414 #ifdef _POSIX_MONOTONIC_CLOCK
415 struct timespec now_ts;
417 if (clock_gettime(EXIM_CLOCKTYPE, &now_ts) == 0)
419 now_ts.tv_sec += offset_ts.tv_sec;
420 if ((now_ts.tv_nsec += offset_ts.tv_nsec) >= 1000*1000*1000)
423 now_ts.tv_nsec -= 1000*1000*1000;
425 tv->tv_sec = now_ts.tv_sec;
426 tv->tv_usec = now_ts.tv_nsec / 1000;
430 (void)gettimeofday(tv, NULL);
434 /* Exim uses a time + a pid to generate a unique identifier in two places: its
435 message IDs, and in file names for maildir deliveries. Because some OS now
436 re-use pids within the same second, sub-second times are now being used.
437 However, for absolute certainty, we must ensure the clock has ticked before
438 allowing the relevant process to complete. At the time of implementation of
439 this code (February 2003), the speed of processors is such that the clock will
440 invariably have ticked already by the time a process has done its job. This
441 function prepares for the time when things are faster - and it also copes with
442 clocks that go backwards.
445 tgt_tv A timeval which was used to create uniqueness; its usec field
446 has been rounded down to the value of the resolution.
447 We want to be sure the current time is greater than this.
448 resolution The resolution that was used to divide the microseconds
449 (1 for maildir, larger for message ids)
455 exim_wait_tick(struct timeval * tgt_tv, int resolution)
457 struct timeval now_tv;
458 long int now_true_usec;
460 exim_gettime(&now_tv);
461 now_true_usec = now_tv.tv_usec;
462 now_tv.tv_usec = (now_true_usec/resolution) * resolution;
464 while (exim_tvcmp(&now_tv, tgt_tv) <= 0)
466 struct itimerval itval;
467 itval.it_interval.tv_sec = 0;
468 itval.it_interval.tv_usec = 0;
469 itval.it_value.tv_sec = tgt_tv->tv_sec - now_tv.tv_sec;
470 itval.it_value.tv_usec = tgt_tv->tv_usec + resolution - now_true_usec;
472 /* We know that, overall, "now" is less than or equal to "then". Therefore, a
473 negative value for the microseconds is possible only in the case when "now"
474 is more than a second less than "tgt". That means that itval.it_value.tv_sec
475 is greater than zero. The following correction is therefore safe. */
477 if (itval.it_value.tv_usec < 0)
479 itval.it_value.tv_usec += 1000000;
480 itval.it_value.tv_sec -= 1;
483 DEBUG(D_transport|D_receive)
485 if (!f.running_in_test_harness)
487 debug_printf("tick check: " TIME_T_FMT ".%06lu " TIME_T_FMT ".%06lu\n",
488 tgt_tv->tv_sec, (long) tgt_tv->tv_usec,
489 now_tv.tv_sec, (long) now_tv.tv_usec);
490 debug_printf("waiting " TIME_T_FMT ".%06lu sec\n",
491 itval.it_value.tv_sec, (long) itval.it_value.tv_usec);
497 /* Be prapared to go around if the kernel does not implement subtick
498 granularity (GNU Hurd) */
500 (void)gettimeofday(&now_tv, NULL);
501 now_true_usec = now_tv.tv_usec;
502 now_tv.tv_usec = (now_true_usec/resolution) * resolution;
509 /*************************************************
510 * Call fopen() with umask 777 and adjust mode *
511 *************************************************/
513 /* Exim runs with umask(0) so that files created with open() have the mode that
514 is specified in the open() call. However, there are some files, typically in
515 the spool directory, that are created with fopen(). They end up world-writeable
516 if no precautions are taken. Although the spool directory is not accessible to
517 the world, this is an untidiness. So this is a wrapper function for fopen()
518 that sorts out the mode of the created file.
521 filename the file name
522 options the fopen() options
523 mode the required mode
525 Returns: the fopened FILE or NULL
529 modefopen(const uschar *filename, const char *options, mode_t mode)
531 mode_t saved_umask = umask(0777);
532 FILE *f = Ufopen(filename, options);
533 (void)umask(saved_umask);
534 if (f != NULL) (void)fchmod(fileno(f), mode);
539 /*************************************************
540 * Ensure stdin, stdout, and stderr exist *
541 *************************************************/
543 /* Some operating systems grumble if an exec() happens without a standard
544 input, output, and error (fds 0, 1, 2) being defined. The worry is that some
545 file will be opened and will use these fd values, and then some other bit of
546 code will assume, for example, that it can write error messages to stderr.
547 This function ensures that fds 0, 1, and 2 are open if they do not already
548 exist, by connecting them to /dev/null.
550 This function is also used to ensure that std{in,out,err} exist at all times,
551 so that if any library that Exim calls tries to use them, it doesn't crash.
562 for (int i = 0; i <= 2; i++)
564 if (fstat(i, &statbuf) < 0 && errno == EBADF)
566 if (devnull < 0) devnull = open("/dev/null", O_RDWR);
567 if (devnull < 0) log_write(0, LOG_MAIN|LOG_PANIC_DIE, "%s",
568 string_open_failed(errno, "/dev/null", NULL));
569 if (devnull != i) (void)dup2(devnull, i);
572 if (devnull > 2) (void)close(devnull);
578 /*************************************************
579 * Close unwanted file descriptors for delivery *
580 *************************************************/
582 /* This function is called from a new process that has been forked to deliver
583 an incoming message, either directly, or using exec.
585 We want any smtp input streams to be closed in this new process. However, it
586 has been observed that using fclose() here causes trouble. When reading in -bS
587 input, duplicate copies of messages have been seen. The files will be sharing a
588 file pointer with the parent process, and it seems that fclose() (at least on
589 some systems - I saw this on Solaris 2.5.1) messes with that file pointer, at
590 least sometimes. Hence we go for closing the underlying file descriptors.
592 If TLS is active, we want to shut down the TLS library, but without molesting
593 the parent's SSL connection.
595 For delivery of a non-SMTP message, we want to close stdin and stdout (and
596 stderr unless debugging) because the calling process might have set them up as
597 pipes and be waiting for them to close before it waits for the submission
598 process to terminate. If they aren't closed, they hold up the calling process
599 until the initial delivery process finishes, which is not what we want.
601 Exception: We do want it for synchronous delivery!
603 And notwithstanding all the above, if D_resolver is set, implying resolver
604 debugging, leave stdout open, because that's where the resolver writes its
607 When we close stderr (which implies we've also closed stdout), we also get rid
608 of any controlling terminal.
620 tls_close(NULL, TLS_NO_SHUTDOWN); /* Shut down the TLS library */
622 (void)close(fileno(smtp_in));
623 (void)close(fileno(smtp_out));
628 (void)close(0); /* stdin */
629 if ((debug_selector & D_resolver) == 0) (void)close(1); /* stdout */
630 if (debug_selector == 0) /* stderr */
632 if (!f.synchronous_delivery)
645 /*************************************************
647 *************************************************/
649 /* This function sets a new uid and gid permanently, optionally calling
650 initgroups() to set auxiliary groups. There are some special cases when running
651 Exim in unprivileged modes. In these situations the effective uid will not be
652 root; if we already have the right effective uid/gid, and don't need to
653 initialize any groups, leave things as they are.
658 igflag TRUE if initgroups() wanted
659 msg text to use in debugging output and failure log
661 Returns: nothing; bombs out on failure
665 exim_setugid(uid_t uid, gid_t gid, BOOL igflag, uschar *msg)
667 uid_t euid = geteuid();
668 gid_t egid = getegid();
670 if (euid == root_uid || euid != uid || egid != gid || igflag)
672 /* At least one OS returns +1 for initgroups failure, so just check for
677 struct passwd *pw = getpwuid(uid);
679 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "cannot run initgroups(): "
680 "no passwd entry for uid=%ld", (long int)uid);
682 if (initgroups(pw->pw_name, gid) != 0)
683 log_write(0,LOG_MAIN|LOG_PANIC_DIE,"initgroups failed for uid=%ld: %s",
684 (long int)uid, strerror(errno));
687 if (setgid(gid) < 0 || setuid(uid) < 0)
688 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "unable to set gid=%ld or uid=%ld "
689 "(euid=%ld): %s", (long int)gid, (long int)uid, (long int)euid, msg);
692 /* Debugging output included uid/gid and all groups */
696 int group_count, save_errno;
697 gid_t group_list[EXIM_GROUPLIST_SIZE];
698 debug_printf("changed uid/gid: %s\n uid=%ld gid=%ld pid=%ld\n", msg,
699 (long int)geteuid(), (long int)getegid(), (long int)getpid());
700 group_count = getgroups(nelem(group_list), group_list);
702 debug_printf(" auxiliary group list:");
704 for (int i = 0; i < group_count; i++) debug_printf(" %d", (int)group_list[i]);
705 else if (group_count < 0)
706 debug_printf(" <error: %s>", strerror(save_errno));
707 else debug_printf(" <none>");
715 /*************************************************
717 *************************************************/
719 /* Exim exits via this function so that it always clears up any open
725 Returns: does not return
734 debug_printf(">>>>>>>>>>>>>>>> Exim pid=%d (%s) terminating with rc=%d "
735 ">>>>>>>>>>>>>>>>\n",
736 (int)getpid(), process_purpose, rc);
742 exim_underbar_exit(int rc)
746 debug_printf(">>>>>>>>>>>>>>>> Exim pid=%d (%s) terminating with rc=%d "
747 ">>>>>>>>>>>>>>>>\n",
748 (int)getpid(), process_purpose, rc);
754 /* Print error string, then die */
756 exim_fail(const char * fmt, ...)
760 vfprintf(stderr, fmt, ap);
764 /* fail if a length is too long */
766 exim_len_fail_toolong(int itemlen, int maxlen, const char *description)
768 if (itemlen <= maxlen)
770 fprintf(stderr, "exim: length limit exceeded (%d > %d) for: %s\n",
771 len, maxlen, description)
775 /* only pass through the string item back to the caller if it's short enough */
776 static const uschar *
777 exim_str_fail_toolong(const uschar *item, int maxlen, const char *description)
779 exim_len_fail_toolong(Ustrlen(item), maxlen, description);
783 /* exim_chown_failure() called from exim_chown()/exim_fchown() on failure
784 of chown()/fchown(). See src/functions.h for more explanation */
786 exim_chown_failure(int fd, const uschar *name, uid_t owner, gid_t group)
788 int saved_errno = errno; /* from the preceeding chown call */
790 log_write(0, LOG_MAIN|LOG_PANIC,
791 __FILE__ ":%d: chown(%s, %d:%d) failed (%s)."
792 " Please contact the authors and refer to https://bugs.exim.org/show_bug.cgi?id=2391",
793 __LINE__, name?name:US"<unknown>", owner, group, strerror(errno));
795 /* I leave this here, commented, in case the "bug"(?) comes up again.
796 It is not an Exim bug, but we can provide a workaround.
802 if (0 == (fd < 0 ? stat(name, &buf) : fstat(fd, &buf)))
804 if (buf.st_uid == owner && buf.st_gid == group) return 0;
805 log_write(0, LOG_MAIN|LOG_PANIC, "Wrong ownership on %s", name);
807 else log_write(0, LOG_MAIN|LOG_PANIC, "Stat failed on %s: %s", name, strerror(errno));
815 /*************************************************
816 * Extract port from host address *
817 *************************************************/
819 /* Called to extract the port from the values given to -oMa and -oMi.
820 It also checks the syntax of the address, and terminates it before the
821 port data when a port is extracted.
824 address the address, with possible port on the end
826 Returns: the port, or zero if there isn't one
827 bombs out on a syntax error
831 check_port(uschar *address)
833 int port = host_address_extract_port(address);
834 if (string_is_ip_address(address, NULL) == 0)
835 exim_fail("exim abandoned: \"%s\" is not an IP address\n", address);
841 /*************************************************
842 * Test/verify an address *
843 *************************************************/
845 /* This function is called by the -bv and -bt code. It extracts a working
846 address from a full RFC 822 address. This isn't really necessary per se, but it
847 has the effect of collapsing source routes.
851 flags flag bits for verify_address()
852 exit_value to be set for failures
858 test_address(uschar *s, int flags, int *exit_value)
860 int start, end, domain;
861 uschar *parse_error = NULL;
862 uschar *address = parse_extract_address(s, &parse_error, &start, &end, &domain,
866 fprintf(stdout, "syntax error: %s\n", parse_error);
871 int rc = verify_address(deliver_make_addr(address,TRUE), stdout, flags, -1,
872 -1, -1, NULL, NULL, NULL);
873 if (rc == FAIL) *exit_value = 2;
874 else if (rc == DEFER && *exit_value == 0) *exit_value = 1;
880 /*************************************************
881 * Show supported features *
882 *************************************************/
885 show_db_version(FILE * f)
887 #ifdef DB_VERSION_STRING
890 fprintf(f, "Library version: BDB: Compile: %s\n", DB_VERSION_STRING);
891 fprintf(f, " Runtime: %s\n",
892 db_version(NULL, NULL, NULL));
895 fprintf(f, "Berkeley DB: %s\n", DB_VERSION_STRING);
897 #elif defined(BTREEVERSION) && defined(HASHVERSION)
899 fprintf(f, "Probably Berkeley DB version 1.8x (native mode)\n");
901 fprintf(f, "Probably Berkeley DB version 1.8x (compatibility mode)\n");
904 #elif defined(_DBM_RDONLY) || defined(dbm_dirfno)
905 fprintf(f, "Probably ndbm\n");
906 #elif defined(USE_TDB)
907 fprintf(f, "Using tdb\n");
910 fprintf(f, "Probably GDBM (native mode)\n");
912 fprintf(f, "Probably GDBM (compatibility mode)\n");
918 /* This function is called for -bV/--version and for -d to output the optional
919 features of the current Exim binary.
921 Arguments: a FILE for printing
926 show_whats_supported(FILE * fp)
928 rmark reset_point = store_mark();
930 DEBUG(D_any) {} else show_db_version(fp);
932 g = string_cat(NULL, US"Support for:");
933 #ifdef SUPPORT_CRYPTEQ
934 g = string_cat(g, US" crypteq");
937 g = string_cat(g, US" iconv()");
940 g = string_cat(g, US" IPv6");
942 #ifdef HAVE_SETCLASSRESOURCES
943 g = string_cat(g, US" use_setclassresources");
946 g = string_cat(g, US" PAM");
949 g = string_cat(g, US" Perl");
952 g = string_cat(g, US" Expand_dlfunc");
954 #ifdef USE_TCP_WRAPPERS
955 g = string_cat(g, US" TCPwrappers");
958 g = string_cat(g, US" GnuTLS");
961 g = string_cat(g, US" OpenSSL");
963 #ifdef SUPPORT_TRANSLATE_IP_ADDRESS
964 g = string_cat(g, US" translate_ip_address");
966 #ifdef SUPPORT_MOVE_FROZEN_MESSAGES
967 g = string_cat(g, US" move_frozen_messages");
969 #ifdef WITH_CONTENT_SCAN
970 g = string_cat(g, US" Content_Scanning");
973 g = string_cat(g, US" DANE");
976 g = string_cat(g, US" DKIM");
978 #ifndef DISABLE_DNSSEC
979 g = string_cat(g, US" DNSSEC");
981 #ifndef DISABLE_EVENT
982 g = string_cat(g, US" Event");
985 g = string_cat(g, US" I18N");
988 g = string_cat(g, US" OCSP");
990 #ifndef DISABLE_PIPE_CONNECT
991 g = string_cat(g, US" PIPE_CONNECT");
994 g = string_cat(g, US" PRDR");
997 g = string_cat(g, US" PROXY");
1000 g = string_cat(g, US" SOCKS");
1003 g = string_cat(g, US" SPF");
1005 #ifdef SUPPORT_DMARC
1006 g = string_cat(g, US" DMARC");
1010 if (f.tcp_fastopen_ok) g = string_cat(g, US" TCP_Fast_Open");
1012 #ifdef EXPERIMENTAL_ARC
1013 g = string_cat(g, US" Experimental_ARC");
1015 #ifdef EXPERIMENTAL_BRIGHTMAIL
1016 g = string_cat(g, US" Experimental_Brightmail");
1018 #ifdef EXPERIMENTAL_DCC
1019 g = string_cat(g, US" Experimental_DCC");
1021 #ifdef EXPERIMENTAL_DSN_INFO
1022 g = string_cat(g, US" Experimental_DSN_info");
1024 #ifdef EXPERIMENTAL_LMDB
1025 g = string_cat(g, US" Experimental_LMDB");
1027 #ifdef EXPERIMENTAL_QUEUE_RAMP
1028 g = string_cat(g, US" Experimental_Queue_Ramp");
1030 #ifdef EXPERIMENTAL_QUEUEFILE
1031 g = string_cat(g, US" Experimental_QUEUEFILE");
1033 #if defined(EXPERIMENTAL_SRS) || defined(EXPERIMENTAL_SRS_NATIVE)
1034 g = string_cat(g, US" Experimental_SRS");
1036 #ifdef EXPERIMENTAL_TLS_RESUME
1037 g = string_cat(g, US" Experimental_TLS_resume");
1039 g = string_cat(g, US"\n");
1041 g = string_cat(g, US"Lookups (built-in):");
1042 #if defined(LOOKUP_LSEARCH) && LOOKUP_LSEARCH!=2
1043 g = string_cat(g, US" lsearch wildlsearch nwildlsearch iplsearch");
1045 #if defined(LOOKUP_CDB) && LOOKUP_CDB!=2
1046 g = string_cat(g, US" cdb");
1048 #if defined(LOOKUP_DBM) && LOOKUP_DBM!=2
1049 g = string_cat(g, US" dbm dbmjz dbmnz");
1051 #if defined(LOOKUP_DNSDB) && LOOKUP_DNSDB!=2
1052 g = string_cat(g, US" dnsdb");
1054 #if defined(LOOKUP_DSEARCH) && LOOKUP_DSEARCH!=2
1055 g = string_cat(g, US" dsearch");
1057 #if defined(LOOKUP_IBASE) && LOOKUP_IBASE!=2
1058 g = string_cat(g, US" ibase");
1060 #if defined(LOOKUP_JSON) && LOOKUP_JSON!=2
1061 g = string_cat(g, US" json");
1063 #if defined(LOOKUP_LDAP) && LOOKUP_LDAP!=2
1064 g = string_cat(g, US" ldap ldapdn ldapm");
1066 #ifdef EXPERIMENTAL_LMDB
1067 g = string_cat(g, US" lmdb");
1069 #if defined(LOOKUP_MYSQL) && LOOKUP_MYSQL!=2
1070 g = string_cat(g, US" mysql");
1072 #if defined(LOOKUP_NIS) && LOOKUP_NIS!=2
1073 g = string_cat(g, US" nis nis0");
1075 #if defined(LOOKUP_NISPLUS) && LOOKUP_NISPLUS!=2
1076 g = string_cat(g, US" nisplus");
1078 #if defined(LOOKUP_ORACLE) && LOOKUP_ORACLE!=2
1079 g = string_cat(g, US" oracle");
1081 #if defined(LOOKUP_PASSWD) && LOOKUP_PASSWD!=2
1082 g = string_cat(g, US" passwd");
1084 #if defined(LOOKUP_PGSQL) && LOOKUP_PGSQL!=2
1085 g = string_cat(g, US" pgsql");
1087 #if defined(LOOKUP_REDIS) && LOOKUP_REDIS!=2
1088 g = string_cat(g, US" redis");
1090 #if defined(LOOKUP_SQLITE) && LOOKUP_SQLITE!=2
1091 g = string_cat(g, US" sqlite");
1093 #if defined(LOOKUP_TESTDB) && LOOKUP_TESTDB!=2
1094 g = string_cat(g, US" testdb");
1096 #if defined(LOOKUP_WHOSON) && LOOKUP_WHOSON!=2
1097 g = string_cat(g, US" whoson");
1099 g = string_cat(g, US"\n");
1101 g = auth_show_supported(g);
1102 g = route_show_supported(g);
1103 g = transport_show_supported(g);
1105 #ifdef WITH_CONTENT_SCAN
1106 g = malware_show_supported(g);
1109 if (fixed_never_users[0] > 0)
1112 g = string_cat(g, US"Fixed never_users: ");
1113 for (i = 1; i <= (int)fixed_never_users[0] - 1; i++)
1114 string_fmt_append(g, "%u:", (unsigned)fixed_never_users[i]);
1115 g = string_fmt_append(g, "%u\n", (unsigned)fixed_never_users[i]);
1118 g = string_fmt_append(g, "Configure owner: %d:%d\n", config_uid, config_gid);
1119 fputs(CS string_from_gstring(g), fp);
1121 fprintf(fp, "Size of off_t: " SIZE_T_FMT "\n", sizeof(off_t));
1123 /* Everything else is details which are only worth reporting when debugging.
1124 Perhaps the tls_version_report should move into this too. */
1127 /* clang defines __GNUC__ (at least, for me) so test for it first */
1128 #if defined(__clang__)
1129 fprintf(fp, "Compiler: CLang [%s]\n", __clang_version__);
1130 #elif defined(__GNUC__)
1131 fprintf(fp, "Compiler: GCC [%s]\n",
1135 "? unknown version ?"
1139 fprintf(fp, "Compiler: <unknown>\n");
1142 #if defined(__GLIBC__) && !defined(__UCLIBC__)
1143 fprintf(fp, "Library version: Glibc: Compile: %d.%d\n",
1144 __GLIBC__, __GLIBC_MINOR__);
1145 if (__GLIBC_PREREQ(2, 1))
1146 fprintf(fp, " Runtime: %s\n",
1147 gnu_get_libc_version());
1150 show_db_version(fp);
1153 tls_version_report(fp);
1156 utf8_version_report(fp);
1159 spf_lib_version_report(fp);
1162 for (auth_info * authi = auths_available; *authi->driver_name != '\0'; ++authi)
1163 if (authi->version_report)
1164 (*authi->version_report)(fp);
1166 /* PCRE_PRERELEASE is either defined and empty or a bare sequence of
1167 characters; unless it's an ancient version of PCRE in which case it
1169 #ifndef PCRE_PRERELEASE
1170 # define PCRE_PRERELEASE
1173 #define EXPAND_AND_QUOTE(X) QUOTE(X)
1174 fprintf(fp, "Library version: PCRE: Compile: %d.%d%s\n"
1176 PCRE_MAJOR, PCRE_MINOR,
1177 EXPAND_AND_QUOTE(PCRE_PRERELEASE) "",
1180 #undef EXPAND_AND_QUOTE
1183 for (int i = 0; i < lookup_list_count; i++)
1184 if (lookup_list[i]->version_report)
1185 lookup_list[i]->version_report(fp);
1187 #ifdef WHITELIST_D_MACROS
1188 fprintf(fp, "WHITELIST_D_MACROS: \"%s\"\n", WHITELIST_D_MACROS);
1190 fprintf(fp, "WHITELIST_D_MACROS unset\n");
1192 #ifdef TRUSTED_CONFIG_LIST
1193 fprintf(fp, "TRUSTED_CONFIG_LIST: \"%s\"\n", TRUSTED_CONFIG_LIST);
1195 fprintf(fp, "TRUSTED_CONFIG_LIST unset\n");
1199 store_reset(reset_point);
1203 /*************************************************
1204 * Show auxiliary information about Exim *
1205 *************************************************/
1208 show_exim_information(enum commandline_info request, FILE *stream)
1213 fprintf(stream, "Oops, something went wrong.\n");
1217 "The -bI: flag takes a string indicating which information to provide.\n"
1218 "If the string is not recognised, you'll get this help (on stderr).\n"
1220 " exim -bI:help this information\n"
1221 " exim -bI:dscp list of known dscp value keywords\n"
1222 " exim -bI:sieve list of supported sieve extensions\n"
1226 for (const uschar ** pp = exim_sieve_extension_list; *pp; ++pp)
1227 fprintf(stream, "%s\n", *pp);
1230 dscp_list_to_stream(stream);
1236 /*************************************************
1237 * Quote a local part *
1238 *************************************************/
1240 /* This function is used when a sender address or a From: or Sender: header
1241 line is being created from the caller's login, or from an authenticated_id. It
1242 applies appropriate quoting rules for a local part.
1244 Argument: the local part
1245 Returns: the local part, quoted if necessary
1249 local_part_quote(uschar *lpart)
1251 BOOL needs_quote = FALSE;
1254 for (uschar * t = lpart; !needs_quote && *t != 0; t++)
1256 needs_quote = !isalnum(*t) && strchr("!#$%&'*+-/=?^_`{|}~", *t) == NULL &&
1257 (*t != '.' || t == lpart || t[1] == 0);
1260 if (!needs_quote) return lpart;
1262 g = string_catn(NULL, US"\"", 1);
1266 uschar *nq = US Ustrpbrk(lpart, "\\\"");
1269 g = string_cat(g, lpart);
1272 g = string_catn(g, lpart, nq - lpart);
1273 g = string_catn(g, US"\\", 1);
1274 g = string_catn(g, nq, 1);
1278 g = string_catn(g, US"\"", 1);
1279 return string_from_gstring(g);
1285 /*************************************************
1286 * Load readline() functions *
1287 *************************************************/
1289 /* This function is called from testing executions that read data from stdin,
1290 but only when running as the calling user. Currently, only -be does this. The
1291 function loads the readline() function library and passes back the functions.
1292 On some systems, it needs the curses library, so load that too, but try without
1293 it if loading fails. All this functionality has to be requested at build time.
1296 fn_readline_ptr pointer to where to put the readline pointer
1297 fn_addhist_ptr pointer to where to put the addhistory function
1299 Returns: the dlopen handle or NULL on failure
1303 set_readline(char * (**fn_readline_ptr)(const char *),
1304 void (**fn_addhist_ptr)(const char *))
1307 void *dlhandle_curses = dlopen("libcurses." DYNLIB_FN_EXT, RTLD_GLOBAL|RTLD_LAZY);
1309 dlhandle = dlopen("libreadline." DYNLIB_FN_EXT, RTLD_GLOBAL|RTLD_NOW);
1310 if (dlhandle_curses) dlclose(dlhandle_curses);
1314 /* Checked manual pages; at least in GNU Readline 6.1, the prototypes are:
1315 * char * readline (const char *prompt);
1316 * void add_history (const char *string);
1318 *fn_readline_ptr = (char *(*)(const char*))dlsym(dlhandle, "readline");
1319 *fn_addhist_ptr = (void(*)(const char*))dlsym(dlhandle, "add_history");
1322 DEBUG(D_any) debug_printf("failed to load readline: %s\n", dlerror());
1330 /*************************************************
1331 * Get a line from stdin for testing things *
1332 *************************************************/
1334 /* This function is called when running tests that can take a number of lines
1335 of input (for example, -be and -bt). It handles continuations and trailing
1336 spaces. And prompting and a blank line output on eof. If readline() is in use,
1337 the arguments are non-NULL and provide the relevant functions.
1340 fn_readline readline function or NULL
1341 fn_addhist addhist function or NULL
1343 Returns: pointer to dynamic memory, or NULL at end of file
1347 get_stdinput(char *(*fn_readline)(const char *), void(*fn_addhist)(const char *))
1351 if (!fn_readline) { printf("> "); fflush(stdout); }
1353 for (int i = 0;; i++)
1355 uschar buffer[1024];
1359 char *readline_line = NULL;
1362 if (!(readline_line = fn_readline((i > 0)? "":"> "))) break;
1363 if (*readline_line != 0 && fn_addhist) fn_addhist(readline_line);
1364 p = US readline_line;
1369 /* readline() not in use */
1372 if (Ufgets(buffer, sizeof(buffer), stdin) == NULL) break;
1376 /* Handle the line */
1378 ss = p + (int)Ustrlen(p);
1379 while (ss > p && isspace(ss[-1])) ss--;
1382 while (p < ss && isspace(*p)) p++; /* leading space after cont */
1384 g = string_catn(g, p, ss - p);
1387 if (fn_readline) free(readline_line);
1390 /* g can only be NULL if ss==p */
1391 if (ss == p || g->s[g->ptr-1] != '\\')
1395 (void) string_from_gstring(g);
1398 if (!g) printf("\n");
1399 return string_from_gstring(g);
1404 /*************************************************
1405 * Output usage information for the program *
1406 *************************************************/
1408 /* This function is called when there are no recipients
1409 or a specific --help argument was added.
1412 progname information on what name we were called by
1414 Returns: DOES NOT RETURN
1418 exim_usage(uschar *progname)
1421 /* Handle specific program invocation variants */
1422 if (Ustrcmp(progname, US"-mailq") == 0)
1424 "mailq - list the contents of the mail queue\n\n"
1425 "For a list of options, see the Exim documentation.\n");
1427 /* Generic usage - we output this whatever happens */
1429 "Exim is a Mail Transfer Agent. It is normally called by Mail User Agents,\n"
1430 "not directly from a shell command line. Options and/or arguments control\n"
1431 "what it does when called. For a list of options, see the Exim documentation.\n");
1436 /*************************************************
1437 * Validate that the macros given are okay *
1438 *************************************************/
1440 /* Typically, Exim will drop privileges if macros are supplied. In some
1441 cases, we want to not do so.
1443 Arguments: opt_D_used - true if the commandline had a "-D" option
1444 Returns: true if trusted, false otherwise
1448 macros_trusted(BOOL opt_D_used)
1450 #ifdef WHITELIST_D_MACROS
1451 uschar *whitelisted, *end, *p, **whites;
1452 int white_count, i, n;
1454 BOOL prev_char_item, found;
1459 #ifndef WHITELIST_D_MACROS
1463 /* We only trust -D overrides for some invoking users:
1464 root, the exim run-time user, the optional config owner user.
1465 I don't know why config-owner would be needed, but since they can own the
1466 config files anyway, there's no security risk to letting them override -D. */
1467 if ( ! ((real_uid == root_uid)
1468 || (real_uid == exim_uid)
1469 #ifdef CONFIGURE_OWNER
1470 || (real_uid == config_uid)
1474 debug_printf("macros_trusted rejecting macros for uid %d\n", (int) real_uid);
1478 /* Get a list of macros which are whitelisted */
1479 whitelisted = string_copy_perm(US WHITELIST_D_MACROS, FALSE);
1480 prev_char_item = FALSE;
1482 for (p = whitelisted; *p != '\0'; ++p)
1484 if (*p == ':' || isspace(*p))
1489 prev_char_item = FALSE;
1492 if (!prev_char_item)
1493 prev_char_item = TRUE;
1500 whites = store_malloc(sizeof(uschar *) * (white_count+1));
1501 for (p = whitelisted, i = 0; (p != end) && (i < white_count); ++p)
1506 if (i == white_count)
1508 while (*p != '\0' && p < end)
1514 /* The list of commandline macros should be very short.
1515 Accept the N*M complexity. */
1516 for (macro_item * m = macros_user; m; m = m->next) if (m->command_line)
1519 for (uschar ** w = whites; *w; ++w)
1520 if (Ustrcmp(*w, m->name) == 0)
1527 if (!m->replacement)
1529 if ((len = m->replen) == 0)
1531 n = pcre_exec(regex_whitelisted_macro, NULL, CS m->replacement, len,
1532 0, PCRE_EOPT, NULL, 0);
1535 if (n != PCRE_ERROR_NOMATCH)
1536 debug_printf("macros_trusted checking %s returned %d\n", m->name, n);
1540 DEBUG(D_any) debug_printf("macros_trusted overridden to true by whitelisting\n");
1546 /*************************************************
1547 * Expansion testing *
1548 *************************************************/
1550 /* Expand and print one item, doing macro-processing.
1553 item line for expansion
1557 expansion_test_line(uschar * line)
1562 Ustrncpy(big_buffer, line, big_buffer_size);
1563 big_buffer[big_buffer_size-1] = '\0';
1564 len = Ustrlen(big_buffer);
1566 (void) macros_expand(0, &len, &dummy_macexp);
1568 if (isupper(big_buffer[0]))
1570 if (macro_read_assignment(big_buffer))
1571 printf("Defined macro '%s'\n", mlast->name);
1574 if ((line = expand_string(big_buffer))) printf("%s\n", CS line);
1575 else printf("Failed: %s\n", expand_string_message);
1580 /*************************************************
1581 * Entry point and high-level code *
1582 *************************************************/
1584 /* Entry point for the Exim mailer. Analyse the arguments and arrange to take
1585 the appropriate action. All the necessary functions are present in the one
1586 binary. I originally thought one should split it up, but it turns out that so
1587 much of the apparatus is needed in each chunk that one might as well just have
1588 it all available all the time, which then makes the coding easier as well.
1591 argc count of entries in argv
1592 argv argument strings, with argv[0] being the program name
1594 Returns: EXIT_SUCCESS if terminated successfully
1595 EXIT_FAILURE otherwise, except when a message has been sent
1596 to the sender, and -oee was given
1600 main(int argc, char **cargv)
1602 uschar **argv = USS cargv;
1603 int arg_receive_timeout = -1;
1604 int arg_smtp_receive_timeout = -1;
1605 int arg_error_handling = error_handling;
1606 int filter_sfd = -1;
1607 int filter_ufd = -1;
1610 int list_queue_option = 0;
1612 int msg_action_arg = -1;
1613 int namelen = (argv[0] == NULL)? 0 : Ustrlen(argv[0]);
1614 int queue_only_reason = 0;
1616 int perl_start_option = 0;
1618 int recipients_arg = argc;
1619 int sender_address_domain = 0;
1620 int test_retry_arg = -1;
1621 int test_rewrite_arg = -1;
1622 gid_t original_egid;
1623 BOOL arg_queue_only = FALSE;
1624 BOOL bi_option = FALSE;
1625 BOOL checking = FALSE;
1626 BOOL count_queue = FALSE;
1627 BOOL expansion_test = FALSE;
1628 BOOL extract_recipients = FALSE;
1629 BOOL flag_G = FALSE;
1630 BOOL flag_n = FALSE;
1631 BOOL forced_delivery = FALSE;
1632 BOOL f_end_dot = FALSE;
1633 BOOL deliver_give_up = FALSE;
1634 BOOL list_queue = FALSE;
1635 BOOL list_options = FALSE;
1636 BOOL list_config = FALSE;
1637 BOOL local_queue_only;
1639 BOOL one_msg_action = FALSE;
1640 BOOL opt_D_used = FALSE;
1641 BOOL queue_only_set = FALSE;
1642 BOOL receiving_message = TRUE;
1643 BOOL sender_ident_set = FALSE;
1644 BOOL session_local_queue_only;
1646 BOOL removed_privilege = FALSE;
1647 BOOL usage_wanted = FALSE;
1648 BOOL verify_address_mode = FALSE;
1649 BOOL verify_as_sender = FALSE;
1650 BOOL version_printed = FALSE;
1651 uschar *alias_arg = NULL;
1652 uschar *called_as = US"";
1653 uschar *cmdline_syslog_name = NULL;
1654 uschar *start_queue_run_id = NULL;
1655 uschar *stop_queue_run_id = NULL;
1656 uschar *expansion_test_message = NULL;
1657 uschar *ftest_domain = NULL;
1658 uschar *ftest_localpart = NULL;
1659 uschar *ftest_prefix = NULL;
1660 uschar *ftest_suffix = NULL;
1661 uschar *log_oneline = NULL;
1662 uschar *malware_test_file = NULL;
1663 uschar *real_sender_address;
1664 uschar *originator_home = US"/";
1668 struct stat statbuf;
1669 pid_t passed_qr_pid = (pid_t)0;
1670 int passed_qr_pipe = -1;
1671 gid_t group_list[EXIM_GROUPLIST_SIZE];
1673 /* For the -bI: flag */
1674 enum commandline_info info_flag = CMDINFO_NONE;
1675 BOOL info_stdout = FALSE;
1677 /* Possible options for -R and -S */
1679 static uschar *rsopts[] = { US"f", US"ff", US"r", US"rf", US"rff" };
1681 /* Need to define this in case we need to change the environment in order
1682 to get rid of a bogus time zone. We have to make it char rather than uschar
1683 because some OS define it in /usr/include/unistd.h. */
1685 extern char **environ;
1687 #ifdef MEASURE_TIMING
1688 (void)gettimeofday(×tamp_startup, NULL);
1691 /* If the Exim user and/or group and/or the configuration file owner/group were
1692 defined by ref:name at build time, we must now find the actual uid/gid values.
1693 This is a feature to make the lives of binary distributors easier. */
1695 #ifdef EXIM_USERNAME
1696 if (route_finduser(US EXIM_USERNAME, &pw, &exim_uid))
1699 exim_fail("exim: refusing to run with uid 0 for \"%s\"\n", EXIM_USERNAME);
1701 /* If ref:name uses a number as the name, route_finduser() returns
1702 TRUE with exim_uid set and pw coerced to NULL. */
1704 exim_gid = pw->pw_gid;
1705 #ifndef EXIM_GROUPNAME
1708 "exim: ref:name should specify a usercode, not a group.\n"
1709 "exim: can't let you get away with it unless you also specify a group.\n");
1713 exim_fail("exim: failed to find uid for user name \"%s\"\n", EXIM_USERNAME);
1716 #ifdef EXIM_GROUPNAME
1717 if (!route_findgroup(US EXIM_GROUPNAME, &exim_gid))
1718 exim_fail("exim: failed to find gid for group name \"%s\"\n", EXIM_GROUPNAME);
1721 #ifdef CONFIGURE_OWNERNAME
1722 if (!route_finduser(US CONFIGURE_OWNERNAME, NULL, &config_uid))
1723 exim_fail("exim: failed to find uid for user name \"%s\"\n",
1724 CONFIGURE_OWNERNAME);
1727 /* We default the system_filter_user to be the Exim run-time user, as a
1728 sane non-root value. */
1729 system_filter_uid = exim_uid;
1731 #ifdef CONFIGURE_GROUPNAME
1732 if (!route_findgroup(US CONFIGURE_GROUPNAME, &config_gid))
1733 exim_fail("exim: failed to find gid for group name \"%s\"\n",
1734 CONFIGURE_GROUPNAME);
1737 /* In the Cygwin environment, some initialization used to need doing.
1738 It was fudged in by means of this macro; now no longer but we'll leave
1739 it in case of others. */
1745 /* Check a field which is patched when we are running Exim within its
1746 testing harness; do a fast initial check, and then the whole thing. */
1748 f.running_in_test_harness =
1749 *running_status == '<' && Ustrcmp(running_status, "<<<testing>>>") == 0;
1750 if (f.running_in_test_harness)
1753 /* The C standard says that the equivalent of setlocale(LC_ALL, "C") is obeyed
1754 at the start of a program; however, it seems that some environments do not
1755 follow this. A "strange" locale can affect the formatting of timestamps, so we
1758 setlocale(LC_ALL, "C");
1760 /* Get the offset between CLOCK_MONOTONIC/CLOCK_BOOTTIME and wallclock */
1762 #ifdef _POSIX_MONOTONIC_CLOCK
1766 /* Set up the default handler for timing using alarm(). */
1768 os_non_restarting_signal(SIGALRM, sigalrm_handler);
1770 /* Ensure we have a buffer for constructing log entries. Use malloc directly,
1771 because store_malloc writes a log entry on failure. */
1773 if (!(log_buffer = US malloc(LOG_BUFFER_SIZE)))
1774 exim_fail("exim: failed to get store for log buffer\n");
1776 /* Initialize the default log options. */
1778 bits_set(log_selector, log_selector_size, log_default);
1780 /* Set log_stderr to stderr, provided that stderr exists. This gets reset to
1781 NULL when the daemon is run and the file is closed. We have to use this
1782 indirection, because some systems don't allow writing to the variable "stderr".
1785 if (fstat(fileno(stderr), &statbuf) >= 0) log_stderr = stderr;
1787 /* Arrange for the PCRE regex library to use our store functions. Note that
1788 the normal calls are actually macros that add additional arguments for
1789 debugging purposes so we have to assign specially constructed functions here.
1790 The default is to use store in the stacking pool, but this is overridden in the
1791 regex_must_compile() function. */
1793 pcre_malloc = function_store_get;
1794 pcre_free = function_dummy_free;
1796 /* Ensure there is a big buffer for temporary use in several places. It is put
1797 in malloc store so that it can be freed for enlargement if necessary. */
1799 big_buffer = store_malloc(big_buffer_size);
1801 /* Set up the handler for the data request signal, and set the initial
1802 descriptive text. */
1804 process_info = store_get(PROCESS_INFO_SIZE, TRUE); /* tainted */
1805 set_process_info("initializing");
1806 os_restarting_signal(SIGUSR1, usr1_handler);
1808 /* If running in a dockerized environment, the TERM signal is only
1809 delegated to the PID 1 if we request it by setting an signal handler */
1810 if (getpid() == 1) signal(SIGTERM, term_handler);
1812 /* SIGHUP is used to get the daemon to reconfigure. It gets set as appropriate
1813 in the daemon code. For the rest of Exim's uses, we ignore it. */
1815 signal(SIGHUP, SIG_IGN);
1817 /* We don't want to die on pipe errors as the code is written to handle
1818 the write error instead. */
1820 signal(SIGPIPE, SIG_IGN);
1822 /* Under some circumstance on some OS, Exim can get called with SIGCHLD
1823 set to SIG_IGN. This causes subprocesses that complete before the parent
1824 process waits for them not to hang around, so when Exim calls wait(), nothing
1825 is there. The wait() code has been made robust against this, but let's ensure
1826 that SIGCHLD is set to SIG_DFL, because it's tidier to wait and get a process
1827 ending status. We use sigaction rather than plain signal() on those OS where
1828 SA_NOCLDWAIT exists, because we want to be sure it is turned off. (There was a
1829 problem on AIX with this.) */
1833 struct sigaction act;
1834 act.sa_handler = SIG_DFL;
1835 sigemptyset(&(act.sa_mask));
1837 sigaction(SIGCHLD, &act, NULL);
1840 signal(SIGCHLD, SIG_DFL);
1843 /* Save the arguments for use if we re-exec exim as a daemon after receiving
1848 /* Set up the version number. Set up the leading 'E' for the external form of
1849 message ids, set the pointer to the internal form, and initialize it to
1850 indicate no message being processed. */
1853 message_id_option[0] = '-';
1854 message_id_external = message_id_option + 1;
1855 message_id_external[0] = 'E';
1856 message_id = message_id_external + 1;
1859 /* Set the umask to zero so that any files Exim creates using open() are
1860 created with the modes that it specifies. NOTE: Files created with fopen() have
1861 a problem, which was not recognized till rather late (February 2006). With this
1862 umask, such files will be world writeable. (They are all content scanning files
1863 in the spool directory, which isn't world-accessible, so this is not a
1864 disaster, but it's untidy.) I don't want to change this overall setting,
1865 however, because it will interact badly with the open() calls. Instead, there's
1866 now a function called modefopen() that fiddles with the umask while calling
1871 /* Precompile the regular expression for matching a message id. Keep this in
1872 step with the code that generates ids in the accept.c module. We need to do
1873 this here, because the -M options check their arguments for syntactic validity
1874 using mac_ismsgid, which uses this. */
1877 regex_must_compile(US"^(?:[^\\W_]{6}-){2}[^\\W_]{2}$", FALSE, TRUE);
1879 /* Precompile the regular expression that is used for matching an SMTP error
1880 code, possibly extended, at the start of an error message. Note that the
1881 terminating whitespace character is included. */
1884 regex_must_compile(US"^\\d\\d\\d\\s(?:\\d\\.\\d\\d?\\d?\\.\\d\\d?\\d?\\s)?",
1887 #ifdef WHITELIST_D_MACROS
1888 /* Precompile the regular expression used to filter the content of macros
1889 given to -D for permissibility. */
1891 regex_whitelisted_macro =
1892 regex_must_compile(US"^[A-Za-z0-9_/.-]*$", FALSE, TRUE);
1895 for (i = 0; i < REGEX_VARS; i++) regex_vars[i] = NULL;
1897 /* If the program is called as "mailq" treat it as equivalent to "exim -bp";
1898 this seems to be a generally accepted convention, since one finds symbolic
1899 links called "mailq" in standard OS configurations. */
1901 if ((namelen == 5 && Ustrcmp(argv[0], "mailq") == 0) ||
1902 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/mailq", 6) == 0))
1905 receiving_message = FALSE;
1906 called_as = US"-mailq";
1909 /* If the program is called as "rmail" treat it as equivalent to
1910 "exim -i -oee", thus allowing UUCP messages to be input using non-SMTP mode,
1911 i.e. preventing a single dot on a line from terminating the message, and
1912 returning with zero return code, even in cases of error (provided an error
1913 message has been sent). */
1915 if ((namelen == 5 && Ustrcmp(argv[0], "rmail") == 0) ||
1916 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/rmail", 6) == 0))
1919 called_as = US"-rmail";
1920 errors_sender_rc = EXIT_SUCCESS;
1923 /* If the program is called as "rsmtp" treat it as equivalent to "exim -bS";
1924 this is a smail convention. */
1926 if ((namelen == 5 && Ustrcmp(argv[0], "rsmtp") == 0) ||
1927 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/rsmtp", 6) == 0))
1929 smtp_input = smtp_batched_input = TRUE;
1930 called_as = US"-rsmtp";
1933 /* If the program is called as "runq" treat it as equivalent to "exim -q";
1934 this is a smail convention. */
1936 if ((namelen == 4 && Ustrcmp(argv[0], "runq") == 0) ||
1937 (namelen > 4 && Ustrncmp(argv[0] + namelen - 5, "/runq", 5) == 0))
1940 receiving_message = FALSE;
1941 called_as = US"-runq";
1944 /* If the program is called as "newaliases" treat it as equivalent to
1945 "exim -bi"; this is a sendmail convention. */
1947 if ((namelen == 10 && Ustrcmp(argv[0], "newaliases") == 0) ||
1948 (namelen > 10 && Ustrncmp(argv[0] + namelen - 11, "/newaliases", 11) == 0))
1951 receiving_message = FALSE;
1952 called_as = US"-newaliases";
1955 /* Save the original effective uid for a couple of uses later. It should
1956 normally be root, but in some esoteric environments it may not be. */
1958 original_euid = geteuid();
1959 original_egid = getegid();
1961 /* Get the real uid and gid. If the caller is root, force the effective uid/gid
1962 to be the same as the real ones. This makes a difference only if Exim is setuid
1963 (or setgid) to something other than root, which could be the case in some
1964 special configurations. */
1966 real_uid = getuid();
1967 real_gid = getgid();
1969 if (real_uid == root_uid)
1971 if ((rv = setgid(real_gid)))
1972 exim_fail("exim: setgid(%ld) failed: %s\n",
1973 (long int)real_gid, strerror(errno));
1974 if ((rv = setuid(real_uid)))
1975 exim_fail("exim: setuid(%ld) failed: %s\n",
1976 (long int)real_uid, strerror(errno));
1979 /* If neither the original real uid nor the original euid was root, Exim is
1980 running in an unprivileged state. */
1982 unprivileged = (real_uid != root_uid && original_euid != root_uid);
1984 /* For most of the args-parsing we need to use permanent pool memory */
1986 int old_pool = store_pool;
1987 store_pool = POOL_PERM;
1989 /* Scan the program's arguments. Some can be dealt with right away; others are
1990 simply recorded for checking and handling afterwards. Do a high-level switch
1991 on the second character (the one after '-'), to save some effort. */
1993 for (i = 1; i < argc; i++)
1995 BOOL badarg = FALSE;
1996 uschar * arg = argv[i];
2000 /* An argument not starting with '-' is the start of a recipients list;
2001 break out of the options-scanning loop. */
2009 /* An option consisting of -- terminates the options */
2011 if (Ustrcmp(arg, "--") == 0)
2013 recipients_arg = i + 1;
2017 /* Handle flagged options */
2019 switchchar = arg[1];
2022 /* Make all -ex options synonymous with -oex arguments, since that
2023 is assumed by various callers. Also make -qR options synonymous with -R
2024 options, as that seems to be required as well. Allow for -qqR too, and
2025 the same for -S options. */
2027 if (Ustrncmp(arg+1, "oe", 2) == 0 ||
2028 Ustrncmp(arg+1, "qR", 2) == 0 ||
2029 Ustrncmp(arg+1, "qS", 2) == 0)
2031 switchchar = arg[2];
2034 else if (Ustrncmp(arg+1, "qqR", 3) == 0 || Ustrncmp(arg+1, "qqS", 3) == 0)
2036 switchchar = arg[3];
2038 f.queue_2stage = TRUE;
2041 /* Make -r synonymous with -f, since it is a documented alias */
2043 else if (arg[1] == 'r') switchchar = 'f';
2045 /* Make -ov synonymous with -v */
2047 else if (Ustrcmp(arg, "-ov") == 0)
2053 /* deal with --option_aliases */
2054 else if (switchchar == '-')
2056 if (Ustrcmp(argrest, "help") == 0)
2058 usage_wanted = TRUE;
2061 else if (Ustrcmp(argrest, "version") == 0)
2068 /* High-level switch on active initial letter */
2073 /* sendmail uses -Ac and -Am to control which .cf file is used;
2076 if (!*argrest) { badarg = TRUE; break; }
2079 BOOL ignore = FALSE;
2084 if (*(argrest + 1) == '\0')
2088 if (!ignore) badarg = TRUE;
2092 /* -Btype is a sendmail option for 7bit/8bit setting. Exim is 8-bit clean
2093 so has no need of it. */
2096 if (!*argrest) i++; /* Skip over the type */
2102 receiving_message = FALSE; /* Reset TRUE for -bm, -bS, -bs below */
2106 /* -bd: Run in daemon mode, awaiting SMTP connections.
2107 -bdf: Ditto, but in the foreground.
2110 f.daemon_listen = TRUE;
2111 if (*argrest == 'f') f.background_daemon = FALSE;
2112 else if (*argrest) badarg = TRUE;
2115 /* -be: Run in expansion test mode
2116 -bem: Ditto, but read a message from a file first
2119 expansion_test = checking = TRUE;
2120 if (*argrest == 'm')
2122 if (++i >= argc) { badarg = TRUE; break; }
2123 expansion_test_message = argv[i];
2126 if (*argrest) badarg = TRUE;
2129 /* -bF: Run system filter test */
2131 filter_test |= checking = FTEST_SYSTEM;
2132 if (*argrest) badarg = TRUE;
2133 else if (++i < argc) filter_test_sfile = argv[i];
2134 else exim_fail("exim: file name expected after %s\n", argv[i-1]);
2137 /* -bf: Run user filter test
2138 -bfd: Set domain for filter testing
2139 -bfl: Set local part for filter testing
2140 -bfp: Set prefix for filter testing
2141 -bfs: Set suffix for filter testing
2146 filter_test |= checking = FTEST_USER;
2147 if (++i < argc) filter_test_ufile = argv[i];
2148 else exim_fail("exim: file name expected after %s\n", argv[i-1]);
2153 exim_fail("exim: string expected after %s\n", arg);
2154 if (Ustrcmp(argrest, "d") == 0) ftest_domain = exim_str_fail_toolong(argv[i], EXIM_DOMAINNAME_MAX, "-bfd");
2155 else if (Ustrcmp(argrest, "l") == 0) ftest_localpart = exim_str_fail_toolong(argv[i], EXIM_LOCALPART_MAX, "-bfl");
2156 else if (Ustrcmp(argrest, "p") == 0) ftest_prefix = exim_str_fail_toolong(argv[i], EXIM_LOCALPART_MAX, "-bfp");
2157 else if (Ustrcmp(argrest, "s") == 0) ftest_suffix = exim_str_fail_toolong(argv[i], EXIM_LOCALPART_MAX, "-bfs");
2162 /* -bh: Host checking - an IP address must follow. */
2164 if (!*argrest || Ustrcmp(argrest, "c") == 0)
2166 if (++i >= argc) { badarg = TRUE; break; }
2167 sender_host_address = string_copy_taint(exim_str_fail_toolong(argv[i], EXIM_IPADDR_MAX, "-bh"), TRUE);
2168 host_checking = checking = f.log_testing_mode = TRUE;
2169 f.host_checking_callout = *argrest == 'c';
2170 message_logs = FALSE;
2175 /* -bi: This option is used by sendmail to initialize *the* alias file,
2176 though it has the -oA option to specify a different file. Exim has no
2177 concept of *the* alias file, but since Sun's YP make script calls
2178 sendmail this way, some support must be provided. */
2180 if (!*argrest) bi_option = TRUE;
2184 /* -bI: provide information, of the type to follow after a colon.
2185 This is an Exim flag. */
2187 if (Ustrlen(argrest) >= 1 && *argrest == ':')
2189 uschar *p = argrest+1;
2190 info_flag = CMDINFO_HELP;
2192 if (strcmpic(p, CUS"sieve") == 0)
2194 info_flag = CMDINFO_SIEVE;
2197 else if (strcmpic(p, CUS"dscp") == 0)
2199 info_flag = CMDINFO_DSCP;
2202 else if (strcmpic(p, CUS"help") == 0)
2208 /* -bm: Accept and deliver message - the default option. Reinstate
2209 receiving_message, which got turned off for all -b options.
2210 -bmalware: test the filename given for malware */
2212 if (!*argrest) receiving_message = TRUE;
2213 else if (Ustrcmp(argrest, "alware") == 0)
2215 if (++i >= argc) { badarg = TRUE; break; }
2217 malware_test_file = argv[i];
2222 /* -bnq: For locally originating messages, do not qualify unqualified
2223 addresses. In the envelope, this causes errors; in header lines they
2226 if (Ustrcmp(argrest, "q") == 0)
2228 f.allow_unqualified_sender = FALSE;
2229 f.allow_unqualified_recipient = FALSE;
2234 /* -bpxx: List the contents of the mail queue, in various forms. If
2235 the option is -bpc, just a queue count is needed. Otherwise, if the
2236 first letter after p is r, then order is random. */
2238 if (*argrest == 'c')
2241 if (*++argrest) badarg = TRUE;
2245 if (*argrest == 'r')
2247 list_queue_option = 8;
2250 else list_queue_option = 0;
2254 /* -bp: List the contents of the mail queue, top-level only */
2258 /* -bpu: List the contents of the mail queue, top-level undelivered */
2260 else if (Ustrcmp(argrest, "u") == 0) list_queue_option += 1;
2262 /* -bpa: List the contents of the mail queue, including all delivered */
2264 else if (Ustrcmp(argrest, "a") == 0) list_queue_option += 2;
2266 /* Unknown after -bp[r] */
2272 /* -bP: List the configuration variables given as the address list.
2273 Force -v, so configuration errors get displayed. */
2276 /* -bP config: we need to setup here, because later,
2277 * when list_options is checked, the config is read already */
2280 else if (argv[i+1] && Ustrcmp(argv[i+1], "config") == 0)
2283 readconf_save_config(version_string);
2287 list_options = TRUE;
2288 debug_selector |= D_v;
2289 debug_file = stderr;
2293 /* -brt: Test retry configuration lookup */
2295 if (Ustrcmp(argrest, "t") == 0)
2298 test_retry_arg = i + 1;
2302 /* -brw: Test rewrite configuration */
2304 else if (Ustrcmp(argrest, "w") == 0)
2307 test_rewrite_arg = i + 1;
2313 /* -bS: Read SMTP commands on standard input, but produce no replies -
2314 all errors are reported by sending messages. */
2317 smtp_input = smtp_batched_input = receiving_message = TRUE;
2321 /* -bs: Read SMTP commands on standard input and produce SMTP replies
2322 on standard output. */
2324 if (!*argrest) smtp_input = receiving_message = TRUE;
2328 /* -bt: address testing mode */
2331 f.address_test_mode = checking = f.log_testing_mode = TRUE;
2335 /* -bv: verify addresses */
2338 verify_address_mode = checking = f.log_testing_mode = TRUE;
2340 /* -bvs: verify sender addresses */
2342 else if (Ustrcmp(argrest, "s") == 0)
2344 verify_address_mode = checking = f.log_testing_mode = TRUE;
2345 verify_as_sender = TRUE;
2350 /* -bV: Print version string and support details */
2354 printf("Exim version %s #%s built %s\n", version_string,
2355 version_cnumber, version_date);
2356 printf("%s\n", CS version_copyright);
2357 version_printed = TRUE;
2358 show_whats_supported(stdout);
2359 f.log_testing_mode = TRUE;
2364 /* -bw: inetd wait mode, accept a listening socket as stdin */
2366 f.inetd_wait_mode = TRUE;
2367 f.background_daemon = FALSE;
2368 f.daemon_listen = TRUE;
2370 if ((inetd_wait_timeout = readconf_readtime(argrest, 0, FALSE)) <= 0)
2371 exim_fail("exim: bad time value %s: abandoned\n", argv[i]);
2382 /* -C: change configuration file list; ignore if it isn't really
2383 a change! Enforce a prefix check if required. */
2387 if (++i < argc) argrest = argv[i]; else { badarg = TRUE; break; }
2388 if (Ustrcmp(config_main_filelist, argrest) != 0)
2390 #ifdef ALT_CONFIG_PREFIX
2392 int len = Ustrlen(ALT_CONFIG_PREFIX);
2393 const uschar *list = argrest;
2395 while((filename = string_nextinlist(&list, &sep, big_buffer,
2397 if ( ( Ustrlen(filename) < len
2398 || Ustrncmp(filename, ALT_CONFIG_PREFIX, len) != 0
2399 || Ustrstr(filename, "/../") != NULL
2401 && (Ustrcmp(filename, "/dev/null") != 0 || real_uid != root_uid)
2403 exim_fail("-C Permission denied\n");
2405 if (real_uid != root_uid)
2407 #ifdef TRUSTED_CONFIG_LIST
2409 if (real_uid != exim_uid
2410 #ifdef CONFIGURE_OWNER
2411 && real_uid != config_uid
2414 f.trusted_config = FALSE;
2417 FILE *trust_list = Ufopen(TRUSTED_CONFIG_LIST, "rb");
2420 struct stat statbuf;
2422 if (fstat(fileno(trust_list), &statbuf) != 0 ||
2423 (statbuf.st_uid != root_uid /* owner not root */
2424 #ifdef CONFIGURE_OWNER
2425 && statbuf.st_uid != config_uid /* owner not the special one */
2428 (statbuf.st_gid != root_gid /* group not root */
2429 #ifdef CONFIGURE_GROUP
2430 && statbuf.st_gid != config_gid /* group not the special one */
2432 && (statbuf.st_mode & 020) != 0 /* group writeable */
2434 (statbuf.st_mode & 2) != 0) /* world writeable */
2436 f.trusted_config = FALSE;
2441 /* Well, the trust list at least is up to scratch... */
2443 uschar *trusted_configs[32];
2446 int old_pool = store_pool;
2447 store_pool = POOL_MAIN;
2449 reset_point = store_mark();
2450 while (Ufgets(big_buffer, big_buffer_size, trust_list))
2452 uschar *start = big_buffer, *nl;
2453 while (*start && isspace(*start))
2457 nl = Ustrchr(start, '\n');
2460 trusted_configs[nr_configs++] = string_copy(start);
2461 if (nr_configs == nelem(trusted_configs))
2469 const uschar *list = argrest;
2471 while (f.trusted_config && (filename = string_nextinlist(&list,
2472 &sep, big_buffer, big_buffer_size)))
2474 for (i=0; i < nr_configs; i++)
2475 if (Ustrcmp(filename, trusted_configs[i]) == 0)
2477 if (i == nr_configs)
2479 f.trusted_config = FALSE;
2484 else /* No valid prefixes found in trust_list file. */
2485 f.trusted_config = FALSE;
2486 store_reset(reset_point);
2487 store_pool = old_pool;
2490 else /* Could not open trust_list file. */
2491 f.trusted_config = FALSE;
2494 /* Not root; don't trust config */
2495 f.trusted_config = FALSE;
2499 config_main_filelist = argrest;
2500 f.config_changed = TRUE;
2505 /* -D: set up a macro definition */
2508 #ifdef DISABLE_D_OPTION
2509 exim_fail("exim: -D is not available in this Exim binary\n");
2515 uschar *s = argrest;
2518 while (isspace(*s)) s++;
2520 if (*s < 'A' || *s > 'Z')
2521 exim_fail("exim: macro name set by -D must start with "
2522 "an upper case letter\n");
2524 while (isalnum(*s) || *s == '_')
2526 if (ptr < sizeof(name)-1) name[ptr++] = *s;
2530 if (ptr == 0) { badarg = TRUE; break; }
2531 while (isspace(*s)) s++;
2534 if (*s++ != '=') { badarg = TRUE; break; }
2535 while (isspace(*s)) s++;
2538 for (m = macros_user; m; m = m->next)
2539 if (Ustrcmp(m->name, name) == 0)
2540 exim_fail("exim: duplicated -D in command line\n");
2542 m = macro_create(name, s, TRUE);
2544 if (clmacro_count >= MAX_CLMACROS)
2545 exim_fail("exim: too many -D options on command line\n");
2546 clmacros[clmacro_count++] =
2547 string_sprintf("-D%s=%s", m->name, m->replacement);
2552 /* -d: Set debug level (see also -v below) or set the drop_cr option.
2553 The latter is now a no-op, retained for compatibility only. If -dd is used,
2554 debugging subprocesses of the daemon is disabled. */
2557 if (Ustrcmp(argrest, "ropcr") == 0)
2559 /* drop_cr = TRUE; */
2562 /* Use an intermediate variable so that we don't set debugging while
2563 decoding the debugging bits. */
2567 unsigned int selector = D_default;
2570 if (*argrest == 'd')
2572 f.debug_daemon = TRUE;
2576 decode_bits(&selector, 1, debug_notall, argrest,
2577 debug_options, debug_options_count, US"debug", 0);
2578 debug_selector = selector;
2583 /* -E: This is a local error message. This option is not intended for
2584 external use at all, but is not restricted to trusted callers because it
2585 does no harm (just suppresses certain error messages) and if Exim is run
2586 not setuid root it won't always be trusted when it generates error
2587 messages using this option. If there is a message id following -E, point
2588 message_reference at it, for logging. */
2591 f.local_error_message = TRUE;
2592 if (mac_ismsgid(argrest)) message_reference = argrest;
2596 /* -ex: The vacation program calls sendmail with the undocumented "-eq"
2597 option, so it looks as if historically the -oex options are also callable
2598 without the leading -o. So we have to accept them. Before the switch,
2599 anything starting -oe has been converted to -e. Exim does not support all
2600 of the sendmail error options. */
2603 if (Ustrcmp(argrest, "e") == 0)
2605 arg_error_handling = ERRORS_SENDER;
2606 errors_sender_rc = EXIT_SUCCESS;
2608 else if (Ustrcmp(argrest, "m") == 0) arg_error_handling = ERRORS_SENDER;
2609 else if (Ustrcmp(argrest, "p") == 0) arg_error_handling = ERRORS_STDERR;
2610 else if (Ustrcmp(argrest, "q") == 0) arg_error_handling = ERRORS_STDERR;
2611 else if (Ustrcmp(argrest, "w") == 0) arg_error_handling = ERRORS_SENDER;
2616 /* -F: Set sender's full name, used instead of the gecos entry from
2617 the password file. Since users can usually alter their gecos entries,
2618 there's no security involved in using this instead. The data can follow
2619 the -F or be in the next argument. */
2623 if (++i < argc) argrest = argv[i]; else { badarg = TRUE; break; }
2624 originator_name = string_copy_taint(exim_str_fail_toolong(argrest, EXIM_HUMANNAME_MAX, "-F"), TRUE);
2625 f.sender_name_forced = TRUE;
2629 /* -f: Set sender's address - this value is only actually used if Exim is
2630 run by a trusted user, or if untrusted_set_sender is set and matches the
2631 address, except that the null address can always be set by any user. The
2632 test for this happens later, when the value given here is ignored when not
2633 permitted. For an untrusted user, the actual sender is still put in Sender:
2634 if it doesn't match the From: header (unless no_local_from_check is set).
2635 The data can follow the -f or be in the next argument. The -r switch is an
2636 obsolete form of -f but since there appear to be programs out there that
2637 use anything that sendmail has ever supported, better accept it - the
2638 synonymizing is done before the switch above.
2640 At this stage, we must allow domain literal addresses, because we don't
2641 know what the setting of allow_domain_literals is yet. Ditto for trailing
2642 dots and strip_trailing_dot. */
2646 int dummy_start, dummy_end;
2649 if (i+1 < argc) argrest = argv[++i]; else { badarg = TRUE; break; }
2650 (void) exim_str_fail_toolong(argrest, EXIM_DISPLAYMAIL_MAX, "-f");
2652 *(sender_address = store_get(1, FALSE)) = '\0'; /* Ensure writeable memory */
2655 uschar * temp = argrest + Ustrlen(argrest) - 1;
2656 while (temp >= argrest && isspace(*temp)) temp--;
2657 if (temp >= argrest && *temp == '.') f_end_dot = TRUE;
2658 allow_domain_literals = TRUE;
2659 strip_trailing_dot = TRUE;
2661 allow_utf8_domains = TRUE;
2663 if (!(sender_address = parse_extract_address(argrest, &errmess,
2664 &dummy_start, &dummy_end, &sender_address_domain, TRUE)))
2665 exim_fail("exim: bad -f address \"%s\": %s\n", argrest, errmess);
2667 sender_address = string_copy_taint(sender_address, TRUE);
2669 message_smtputf8 = string_is_utf8(sender_address);
2670 allow_utf8_domains = FALSE;
2672 allow_domain_literals = FALSE;
2673 strip_trailing_dot = FALSE;
2675 f.sender_address_forced = TRUE;
2679 /* -G: sendmail invocation to specify that it's a gateway submission and
2680 sendmail may complain about problems instead of fixing them.
2681 We make it equivalent to an ACL "control = suppress_local_fixups" and do
2682 not at this time complain about problems. */
2688 /* -h: Set the hop count for an incoming message. Exim does not currently
2689 support this; it always computes it by counting the Received: headers.
2690 To put it in will require a change to the spool header file format. */
2694 if (++i < argc) argrest = argv[i]; else { badarg = TRUE; break; }
2695 if (!isdigit(*argrest)) badarg = TRUE;
2699 /* -i: Set flag so dot doesn't end non-SMTP input (same as -oi, seems
2700 not to be documented for sendmail but mailx (at least) uses it) */
2703 if (!*argrest) f.dot_ends = FALSE; else badarg = TRUE;
2707 /* -L: set the identifier used for syslog; equivalent to setting
2708 syslog_processname in the config file, but needs to be an admin option. */
2712 if (++i < argc) argrest = argv[i]; else { badarg = TRUE; break; }
2713 if ((sz = Ustrlen(argrest)) > 32)
2714 exim_fail("exim: the -L syslog name is too long: \"%s\"\n", argrest);
2716 exim_fail("exim: the -L syslog name is too short\n");
2717 cmdline_syslog_name = string_copy_taint(argrest, TRUE);
2721 receiving_message = FALSE;
2723 /* -MC: continue delivery of another message via an existing open
2724 file descriptor. This option is used for an internal call by the
2725 smtp transport when there is a pending message waiting to go to an
2726 address to which it has got a connection. Five subsequent arguments are
2727 required: transport name, host name, IP address, sequence number, and
2728 message_id. Transports may decline to create new processes if the sequence
2729 number gets too big. The channel is stdin. This (-MC) must be the last
2730 argument. There's a subsequent check that the real-uid is privileged.
2732 If we are running in the test harness. delay for a bit, to let the process
2733 that set this one up complete. This makes for repeatability of the logging,
2736 if (Ustrcmp(argrest, "C") == 0)
2738 union sockaddr_46 interface_sock;
2739 EXIM_SOCKLEN_T size = sizeof(interface_sock);
2742 exim_fail("exim: too many or too few arguments after -MC\n");
2744 if (msg_action_arg >= 0)
2745 exim_fail("exim: incompatible arguments\n");
2747 continue_transport = string_copy_taint(exim_str_fail_toolong(argv[++i], EXIM_DRIVERNAME_MAX, "-C internal transport"), TRUE);
2748 continue_hostname = string_copy_taint(exim_str_fail_toolong(argv[++i], EXIM_HOSTNAME_MAX, "-C internal hostname"), TRUE);
2749 continue_host_address = string_copy_taint(exim_str_fail_toolong(argv[++i], EXIM_IPADDR_MAX, "-C internal hostaddr"), TRUE);
2750 continue_sequence = Uatoi(argv[++i]);
2751 msg_action = MSG_DELIVER;
2752 msg_action_arg = ++i;
2753 forced_delivery = TRUE;
2754 queue_run_pid = passed_qr_pid;
2755 queue_run_pipe = passed_qr_pipe;
2757 if (!mac_ismsgid(argv[i]))
2758 exim_fail("exim: malformed message id %s after -MC option\n",
2761 /* Set up $sending_ip_address and $sending_port, unless proxied */
2763 if (!continue_proxy_cipher)
2764 if (getsockname(fileno(stdin), (struct sockaddr *)(&interface_sock),
2766 sending_ip_address = host_ntoa(-1, &interface_sock, NULL,
2769 exim_fail("exim: getsockname() failed after -MC option: %s\n",
2772 testharness_pause_ms(500);
2776 else if (*argrest == 'C' && argrest[1] && !argrest[2])
2780 /* -MCA: set the smtp_authenticated flag; this is useful only when it
2781 precedes -MC (see above). The flag indicates that the host to which
2782 Exim is connected has accepted an AUTH sequence. */
2784 case 'A': f.smtp_authenticated = TRUE; break;
2786 /* -MCD: set the smtp_use_dsn flag; this indicates that the host
2787 that exim is connected to supports the esmtp extension DSN */
2789 case 'D': smtp_peer_options |= OPTION_DSN; break;
2791 /* -MCd: for debug, set a process-purpose string */
2793 case 'd': if (++i < argc)
2794 process_purpose = string_copy_taint(exim_str_fail_toolong(argv[i], EXIM_DRIVERNAME_MAX, "-MCd"), TRUE);
2798 /* -MCG: set the queue name, to a non-default value */
2800 case 'G': if (++i < argc) queue_name = string_copy_taint(exim_str_fail_toolong(argv[i], EXIM_DRIVERNAME_MAX, "-MCG"), TRUE);
2804 /* -MCK: the peer offered CHUNKING. Must precede -MC */
2806 case 'K': smtp_peer_options |= OPTION_CHUNKING; break;
2808 /* -MCP: set the smtp_use_pipelining flag; this is useful only when
2809 it preceded -MC (see above) */
2811 case 'P': smtp_peer_options |= OPTION_PIPE; break;
2813 /* -MCQ: pass on the pid of the queue-running process that started
2814 this chain of deliveries and the fd of its synchronizing pipe; this
2815 is useful only when it precedes -MC (see above) */
2817 case 'Q': if (++i < argc) passed_qr_pid = (pid_t)(Uatol(argv[i]));
2819 if (++i < argc) passed_qr_pipe = (int)(Uatol(argv[i]));
2823 /* -MCS: set the smtp_use_size flag; this is useful only when it
2824 precedes -MC (see above) */
2826 case 'S': smtp_peer_options |= OPTION_SIZE; break;
2829 /* -MCs: used with -MCt; SNI was sent */
2830 /* -MCr: ditto, DANE */
2833 case 's': if (++i < argc)
2835 continue_proxy_sni = string_copy_taint(exim_str_fail_toolong(argv[i], EXIM_HOSTNAME_MAX, "-MCr/-MCs"), TRUE);
2836 if (argrest[1] == 'r') continue_proxy_dane = TRUE;
2841 /* -MCt: similar to -MCT below but the connection is still open
2842 via a proxy process which handles the TLS context and coding.
2843 Require three arguments for the proxied local address and port,
2844 and the TLS cipher. */
2846 case 't': if (++i < argc)
2847 sending_ip_address = string_copy_taint(exim_str_fail_toolong(argv[i], EXIM_IPADDR_MAX, "-MCt IP"), TRUE);
2850 sending_port = (int)(Uatol(argv[i]));
2853 continue_proxy_cipher = string_copy_taint(exim_str_fail_toolong(argv[i], EXIM_CIPHERNAME_MAX, "-MCt cipher"), TRUE);
2857 /* -MCT: set the tls_offered flag; this is useful only when it
2858 precedes -MC (see above). The flag indicates that the host to which
2859 Exim is connected has offered TLS support. */
2861 case 'T': smtp_peer_options |= OPTION_TLS; break;
2864 default: badarg = TRUE; break;
2869 /* -M[x]: various operations on the following list of message ids:
2870 -M deliver the messages, ignoring next retry times and thawing
2871 -Mc deliver the messages, checking next retry times, no thawing
2872 -Mf freeze the messages
2873 -Mg give up on the messages
2874 -Mt thaw the messages
2875 -Mrm remove the messages
2876 In the above cases, this must be the last option. There are also the
2877 following options which are followed by a single message id, and which
2878 act on that message. Some of them use the "recipient" addresses as well.
2879 -Mar add recipient(s)
2880 -MG move to a different queue
2881 -Mmad mark all recipients delivered
2882 -Mmd mark recipients(s) delivered
2884 -Mset load a message for use with -be
2886 -Mvc show copy (of whole message, in RFC 2822 format)
2893 msg_action = MSG_DELIVER;
2894 forced_delivery = f.deliver_force_thaw = TRUE;
2896 else if (Ustrcmp(argrest, "ar") == 0)
2898 msg_action = MSG_ADD_RECIPIENT;
2899 one_msg_action = TRUE;
2901 else if (Ustrcmp(argrest, "c") == 0) msg_action = MSG_DELIVER;
2902 else if (Ustrcmp(argrest, "es") == 0)
2904 msg_action = MSG_EDIT_SENDER;
2905 one_msg_action = TRUE;
2907 else if (Ustrcmp(argrest, "f") == 0) msg_action = MSG_FREEZE;
2908 else if (Ustrcmp(argrest, "g") == 0)
2910 msg_action = MSG_DELIVER;
2911 deliver_give_up = TRUE;
2913 else if (Ustrcmp(argrest, "G") == 0)
2915 msg_action = MSG_SETQUEUE;
2916 queue_name_dest = string_copy_taint(exim_str_fail_toolong(argv[++i], EXIM_DRIVERNAME_MAX, "-MG"), TRUE);
2918 else if (Ustrcmp(argrest, "mad") == 0)
2920 msg_action = MSG_MARK_ALL_DELIVERED;
2922 else if (Ustrcmp(argrest, "md") == 0)
2924 msg_action = MSG_MARK_DELIVERED;
2925 one_msg_action = TRUE;
2927 else if (Ustrcmp(argrest, "rm") == 0) msg_action = MSG_REMOVE;
2928 else if (Ustrcmp(argrest, "set") == 0)
2930 msg_action = MSG_LOAD;
2931 one_msg_action = TRUE;
2933 else if (Ustrcmp(argrest, "t") == 0) msg_action = MSG_THAW;
2934 else if (Ustrcmp(argrest, "vb") == 0)
2936 msg_action = MSG_SHOW_BODY;
2937 one_msg_action = TRUE;
2939 else if (Ustrcmp(argrest, "vc") == 0)
2941 msg_action = MSG_SHOW_COPY;
2942 one_msg_action = TRUE;
2944 else if (Ustrcmp(argrest, "vh") == 0)
2946 msg_action = MSG_SHOW_HEADER;
2947 one_msg_action = TRUE;
2949 else if (Ustrcmp(argrest, "vl") == 0)
2951 msg_action = MSG_SHOW_LOG;
2952 one_msg_action = TRUE;
2954 else { badarg = TRUE; break; }
2956 /* All the -Mxx options require at least one message id. */
2958 msg_action_arg = i + 1;
2959 if (msg_action_arg >= argc)
2960 exim_fail("exim: no message ids given after %s option\n", arg);
2962 /* Some require only message ids to follow */
2964 if (!one_msg_action)
2966 for (int j = msg_action_arg; j < argc; j++) if (!mac_ismsgid(argv[j]))
2967 exim_fail("exim: malformed message id %s after %s option\n",
2969 goto END_ARG; /* Remaining args are ids */
2972 /* Others require only one message id, possibly followed by addresses,
2973 which will be handled as normal arguments. */
2977 if (!mac_ismsgid(argv[msg_action_arg]))
2978 exim_fail("exim: malformed message id %s after %s option\n",
2979 argv[msg_action_arg], arg);
2985 /* Some programs seem to call the -om option without the leading o;
2986 for sendmail it askes for "me too". Exim always does this. */
2989 if (*argrest) badarg = TRUE;
2993 /* -N: don't do delivery - a debugging option that stops transports doing
2994 their thing. It implies debugging at the D_v level. */
2999 f.dont_deliver = TRUE;
3000 debug_selector |= D_v;
3001 debug_file = stderr;
3007 /* -n: This means "don't alias" in sendmail, apparently.
3008 For normal invocations, it has no effect.
3009 It may affect some other options. */
3015 /* -O: Just ignore it. In sendmail, apparently -O option=value means set
3016 option to the specified value. This form uses long names. We need to handle
3017 -O option=value and -Ooption=value. */
3022 exim_fail("exim: string expected after -O\n");
3028 /* -oA: Set an argument for the bi command (sendmail's "alternate alias
3031 if (!*(alias_arg = argrest))
3032 if (i+1 < argc) alias_arg = argv[++i];
3033 else exim_fail("exim: string expected after -oA\n");
3036 /* -oB: Set a connection message max value for remote deliveries */
3039 uschar * p = argrest;
3041 if (i+1 < argc && isdigit((argv[i+1][0])))
3045 connection_max_messages = 1;
3052 exim_fail("exim: number expected after -oB\n");
3053 connection_max_messages = Uatoi(p);
3058 /* -odb: background delivery */
3061 if (Ustrcmp(argrest, "b") == 0)
3063 f.synchronous_delivery = FALSE;
3064 arg_queue_only = FALSE;
3065 queue_only_set = TRUE;
3068 /* -odd: testsuite-only: add no inter-process delays */
3070 else if (Ustrcmp(argrest, "d") == 0)
3071 f.testsuite_delays = FALSE;
3073 /* -odf: foreground delivery (smail-compatible option); same effect as
3074 -odi: interactive (synchronous) delivery (sendmail-compatible option)
3077 else if (Ustrcmp(argrest, "f") == 0 || Ustrcmp(argrest, "i") == 0)
3079 f.synchronous_delivery = TRUE;
3080 arg_queue_only = FALSE;
3081 queue_only_set = TRUE;
3084 /* -odq: queue only */
3086 else if (Ustrcmp(argrest, "q") == 0)
3088 f.synchronous_delivery = FALSE;
3089 arg_queue_only = TRUE;
3090 queue_only_set = TRUE;
3093 /* -odqs: queue SMTP only - do local deliveries and remote routing,
3094 but no remote delivery */
3096 else if (Ustrcmp(argrest, "qs") == 0)
3098 f.queue_smtp = TRUE;
3099 arg_queue_only = FALSE;
3100 queue_only_set = TRUE;
3105 /* -oex: Sendmail error flags. As these are also accepted without the
3106 leading -o prefix, for compatibility with vacation and other callers,
3107 they are handled with -e above. */
3109 /* -oi: Set flag so dot doesn't end non-SMTP input (same as -i)
3110 -oitrue: Another sendmail syntax for the same */
3113 if (!*argrest || Ustrcmp(argrest, "true") == 0)
3118 /* -oM*: Set various characteristics for an incoming message; actually
3119 acted on for trusted callers only. */
3124 exim_fail("exim: data expected after -oM%s\n", argrest);
3126 /* -oMa: Set sender host address */
3128 if (Ustrcmp(argrest, "a") == 0)
3129 sender_host_address = string_copy_taint(exim_str_fail_toolong(argv[++i], EXIM_IPADDR_MAX, "-oMa"), TRUE);
3131 /* -oMaa: Set authenticator name */
3133 else if (Ustrcmp(argrest, "aa") == 0)
3134 sender_host_authenticated = string_copy_taint(exim_str_fail_toolong(argv[++i], EXIM_DRIVERNAME_MAX, "-oMaa"), TRUE);
3136 /* -oMas: setting authenticated sender */
3138 else if (Ustrcmp(argrest, "as") == 0)
3139 authenticated_sender = string_copy_taint(exim_str_fail_toolong(argv[++i], EXIM_EMAILADDR_MAX, "-oMas"), TRUE);
3141 /* -oMai: setting authenticated id */
3143 else if (Ustrcmp(argrest, "ai") == 0)
3144 authenticated_id = string_copy_taint(exim_str_fail_toolong(argv[++i], EXIM_EMAILADDR_MAX, "-oMas"), TRUE);
3146 /* -oMi: Set incoming interface address */
3148 else if (Ustrcmp(argrest, "i") == 0)
3149 interface_address = string_copy_taint(exim_str_fail_toolong(argv[++i], EXIM_IPADDR_MAX, "-oMi"), TRUE);
3151 /* -oMm: Message reference */
3153 else if (Ustrcmp(argrest, "m") == 0)
3155 if (!mac_ismsgid(argv[i+1]))
3156 exim_fail("-oMm must be a valid message ID\n");
3157 if (!f.trusted_config)
3158 exim_fail("-oMm must be called by a trusted user/config\n");
3159 message_reference = argv[++i];
3162 /* -oMr: Received protocol */
3164 else if (Ustrcmp(argrest, "r") == 0)
3166 if (received_protocol)
3167 exim_fail("received_protocol is set already\n");
3169 received_protocol = string_copy_taint(exim_str_fail_toolong(argv[++i], EXIM_DRIVERNAME_MAX, "-oMr"), TRUE);
3171 /* -oMs: Set sender host name */
3173 else if (Ustrcmp(argrest, "s") == 0)
3174 sender_host_name = string_copy_taint(exim_str_fail_toolong(argv[++i], EXIM_HOSTNAME_MAX, "-oMs"), TRUE);
3176 /* -oMt: Set sender ident */
3178 else if (Ustrcmp(argrest, "t") == 0)
3180 sender_ident_set = TRUE;
3181 sender_ident = string_copy_taint(exim_str_fail_toolong(argv[++i], EXIM_IDENTUSER_MAX, "-oMt"), TRUE);
3184 /* Else a bad argument */
3191 /* -om: Me-too flag for aliases. Exim always does this. Some programs
3192 seem to call this as -m (undocumented), so that is also accepted (see
3194 /* -oo: An ancient flag for old-style addresses which still seems to
3195 crop up in some calls (see in SCO). */
3199 if (*argrest) badarg = TRUE;
3202 /* -oP <name>: set pid file path for daemon
3203 -oPX: delete pid file of daemon */
3206 if (!*argrest) override_pid_file_path = argv[++i];
3207 else if (Ustrcmp(argrest, "X") == 0) delete_pid_file();
3212 /* -or <n>: set timeout for non-SMTP acceptance
3213 -os <n>: set timeout for SMTP acceptance */
3218 int * tp = argrest[-1] == 'r'
3219 ? &arg_receive_timeout : &arg_smtp_receive_timeout;
3221 *tp = readconf_readtime(argrest, 0, FALSE);
3222 else if (i+1 < argc)
3223 *tp = readconf_readtime(argv[++i], 0, FALSE);
3226 exim_fail("exim: bad time value %s: abandoned\n", argv[i]);
3230 /* -oX <list>: Override local_interfaces and/or default daemon ports */
3231 /* Limits: Is there a real limit we want here? 1024 is very arbitrary. */
3234 if (*argrest) badarg = TRUE;
3235 else override_local_interfaces = string_copy_taint(exim_str_fail_toolong(argv[++i], 1024, "-oX", TRUE);
3238 /* Unknown -o argument */
3246 /* -ps: force Perl startup; -pd force delayed Perl startup */
3250 if (*argrest == 's' && argrest[1] == 0)
3252 perl_start_option = 1;
3255 if (*argrest == 'd' && argrest[1] == 0)
3257 perl_start_option = -1;
3262 /* -panythingelse is taken as the Sendmail-compatible argument -prval:sval,
3263 which sets the host protocol and host name */
3266 if (i+1 < argc) argrest = argv[++i]; else { badarg = TRUE; break; }
3270 uschar * hn = Ustrchr(argrest, ':');
3272 if (received_protocol)
3273 exim_fail("received_protocol is set already\n");
3276 received_protocol = string_copy_taint(exim_str_fail_toolong(argrest, EXIM_DRIVERNAME_MAX, "-p<protocol>"), TRUE);
3279 (void) exim_str_fail_toolong(argrest, (EXIM_DRIVERNAME_MAX+1+EXIM_HOSTNAME_MAX), "-p<protocol>:<host>");
3280 received_protocol = string_copyn_taint(argrest, hn - argrest, TRUE);
3281 sender_host_name = string_copy_taint(hn + 1, TRUE);
3288 receiving_message = FALSE;
3289 if (queue_interval >= 0)
3290 exim_fail("exim: -q specified more than once\n");
3292 /* -qq...: Do queue runs in a 2-stage manner */
3294 if (*argrest == 'q')
3296 f.queue_2stage = TRUE;
3300 /* -qi...: Do only first (initial) deliveries */
3302 if (*argrest == 'i')
3304 f.queue_run_first_delivery = TRUE;
3308 /* -qf...: Run the queue, forcing deliveries
3309 -qff..: Ditto, forcing thawing as well */
3311 if (*argrest == 'f')
3313 f.queue_run_force = TRUE;
3314 if (*++argrest == 'f')
3316 f.deliver_force_thaw = TRUE;
3321 /* -q[f][f]l...: Run the queue only on local deliveries */
3323 if (*argrest == 'l')
3325 f.queue_run_local = TRUE;
3329 /* -q[f][f][l][G<name>]... Work on the named queue */
3331 if (*argrest == 'G')
3334 for (argrest++, i = 0; argrest[i] && argrest[i] != '/'; ) i++;
3335 exim_len_fail_toolong(i, EXIM_DRIVERNAME_MAX, "-q*G<name>");
3336 queue_name = string_copyn(argrest, i);
3338 if (*argrest == '/') argrest++;
3341 /* -q[f][f][l][G<name>]: Run the queue, optionally forced, optionally local
3342 only, optionally named, optionally starting from a given message id. */
3344 if (!(list_queue || count_queue))
3346 && (i + 1 >= argc || argv[i+1][0] == '-' || mac_ismsgid(argv[i+1])))
3349 if (i+1 < argc && mac_ismsgid(argv[i+1]))
3350 start_queue_run_id = string_copy_taint(argv[++i], TRUE);
3351 if (i+1 < argc && mac_ismsgid(argv[i+1]))
3352 stop_queue_run_id = string_copy_taint(argv[++i], TRUE);
3355 /* -q[f][f][l][G<name>/]<n>: Run the queue at regular intervals, optionally
3356 forced, optionally local only, optionally named. */
3358 else if ((queue_interval = readconf_readtime(*argrest ? argrest : argv[++i],
3360 exim_fail("exim: bad time value %s: abandoned\n", argv[i]);
3364 case 'R': /* Synonymous with -qR... */
3365 receiving_message = FALSE;
3367 /* -Rf: As -R (below) but force all deliveries,
3368 -Rff: Ditto, but also thaw all frozen messages,
3369 -Rr: String is regex
3370 -Rrf: Regex and force
3371 -Rrff: Regex and force and thaw
3373 in all cases provided there are no further characters in this
3377 for (int i = 0; i < nelem(rsopts); i++)
3378 if (Ustrcmp(argrest, rsopts[i]) == 0)
3380 if (i != 2) f.queue_run_force = TRUE;
3381 if (i >= 2) f.deliver_selectstring_regex = TRUE;
3382 if (i == 1 || i == 4) f.deliver_force_thaw = TRUE;
3383 argrest += Ustrlen(rsopts[i]);
3386 /* -R: Set string to match in addresses for forced queue run to
3387 pick out particular messages. */
3389 /* Avoid attacks from people providing very long strings, and do so before
3391 const char *tainted_selectstr;
3393 tainted_selectstr = argrest;
3394 else if (i+1 < argc)
3395 tainted_selectstr = argv[++i];
3397 exim_fail("exim: string expected after -R\n");
3398 deliver_selectstring = string_copy_taint(exim_str_fail_toolong(tainted_selectstr, EXIM_EMAILADDR_MAX, "-R"), TRUE);
3401 /* -r: an obsolete synonym for -f (see above) */
3404 /* -S: Like -R but works on sender. */
3406 case 'S': /* Synonymous with -qS... */
3407 receiving_message = FALSE;
3409 /* -Sf: As -S (below) but force all deliveries,
3410 -Sff: Ditto, but also thaw all frozen messages,
3411 -Sr: String is regex
3412 -Srf: Regex and force
3413 -Srff: Regex and force and thaw
3415 in all cases provided there are no further characters in this
3419 for (int i = 0; i < nelem(rsopts); i++)
3420 if (Ustrcmp(argrest, rsopts[i]) == 0)
3422 if (i != 2) f.queue_run_force = TRUE;
3423 if (i >= 2) f.deliver_selectstring_sender_regex = TRUE;
3424 if (i == 1 || i == 4) f.deliver_force_thaw = TRUE;
3425 argrest += Ustrlen(rsopts[i]);
3428 /* -S: Set string to match in addresses for forced queue run to
3429 pick out particular messages. */
3431 const char *tainted_selectstr;
3433 tainted_selectstr = argrest;
3434 else if (i+1 < argc)
3435 tainted_selectstr = argv[++i];
3437 exim_fail("exim: string expected after -S\n");
3438 deliver_selectstring_sender = string_copy_taint(exim_str_fail_toolong(tainted_selectstr, EXIM_EMAILADDR_MAX, "-S"), TRUE);
3441 /* -Tqt is an option that is exclusively for use by the testing suite.
3442 It is not recognized in other circumstances. It allows for the setting up
3443 of explicit "queue times" so that various warning/retry things can be
3444 tested. Otherwise variability of clock ticks etc. cause problems. */
3447 if (f.running_in_test_harness && Ustrcmp(argrest, "qt") == 0)
3448 fudged_queue_times = string_copy_taint(argv[++i], TRUE);
3453 /* -t: Set flag to extract recipients from body of message. */
3456 if (!*argrest) extract_recipients = TRUE;
3458 /* -ti: Set flag to extract recipients from body of message, and also
3459 specify that dot does not end the message. */
3461 else if (Ustrcmp(argrest, "i") == 0)
3463 extract_recipients = TRUE;
3467 /* -tls-on-connect: don't wait for STARTTLS (for old clients) */
3470 else if (Ustrcmp(argrest, "ls-on-connect") == 0) tls_in.on_connect = TRUE;
3477 /* -U: This means "initial user submission" in sendmail, apparently. The
3478 doc claims that in future sendmail may refuse syntactically invalid
3479 messages instead of fixing them. For the moment, we just ignore it. */
3485 /* -v: verify things - this is a very low-level debugging */
3490 debug_selector |= D_v;
3491 debug_file = stderr;
3497 /* -x: AIX uses this to indicate some fancy 8-bit character stuff:
3499 The -x flag tells the sendmail command that mail from a local
3500 mail program has National Language Support (NLS) extended characters
3501 in the body of the mail item. The sendmail command can send mail with
3502 extended NLS characters across networks that normally corrupts these
3505 As Exim is 8-bit clean, it just ignores this flag. */
3508 if (*argrest) badarg = TRUE;
3511 /* -X: in sendmail: takes one parameter, logfile, and sends debugging
3512 logs to that file. We swallow the parameter and otherwise ignore it. */
3517 exim_fail("exim: string expected after -X\n");
3520 /* -z: a line of text to log */
3525 log_oneline = string_copy_taint(exim_str_fail_toolong(argv[i], 2048, "-z logtext"), TRUE);
3527 exim_fail("exim: file name expected after %s\n", argv[i-1]);
3530 /* All other initial characters are errors */
3535 } /* End of high-level switch statement */
3537 /* Failed to recognize the option, or syntax error */
3540 exim_fail("exim abandoned: unknown, malformed, or incomplete "
3541 "option %s\n", arg);
3545 /* If -R or -S have been specified without -q, assume a single queue run. */
3547 if ( (deliver_selectstring || deliver_selectstring_sender)
3548 && queue_interval < 0)
3553 store_pool = old_pool;
3556 /* If usage_wanted is set we call the usage function - which never returns */
3557 if (usage_wanted) exim_usage(called_as);
3559 /* Arguments have been processed. Check for incompatibilities. */
3561 (smtp_input || extract_recipients || recipients_arg < argc) &&
3562 (f.daemon_listen || queue_interval >= 0 || bi_option ||
3563 test_retry_arg >= 0 || test_rewrite_arg >= 0 ||
3564 filter_test != FTEST_NONE || (msg_action_arg > 0 && !one_msg_action))
3567 msg_action_arg > 0 &&
3568 (f.daemon_listen || queue_interval > 0 || list_options ||
3569 (checking && msg_action != MSG_LOAD) ||
3570 bi_option || test_retry_arg >= 0 || test_rewrite_arg >= 0)
3573 (f.daemon_listen || queue_interval > 0) &&
3574 (sender_address != NULL || list_options || list_queue || checking ||
3578 f.daemon_listen && queue_interval == 0
3581 f.inetd_wait_mode && queue_interval >= 0
3585 (checking || smtp_input || extract_recipients ||
3586 filter_test != FTEST_NONE || bi_option)
3589 verify_address_mode &&
3590 (f.address_test_mode || smtp_input || extract_recipients ||
3591 filter_test != FTEST_NONE || bi_option)
3594 f.address_test_mode && (smtp_input || extract_recipients ||
3595 filter_test != FTEST_NONE || bi_option)
3598 smtp_input && (sender_address != NULL || filter_test != FTEST_NONE ||
3602 deliver_selectstring != NULL && queue_interval < 0
3605 msg_action == MSG_LOAD &&
3606 (!expansion_test || expansion_test_message != NULL)
3609 exim_fail("exim: incompatible command-line options or arguments\n");
3611 /* If debugging is set up, set the file and the file descriptor to pass on to
3612 child processes. It should, of course, be 2 for stderr. Also, force the daemon
3613 to run in the foreground. */
3615 if (debug_selector != 0)
3617 debug_file = stderr;
3618 debug_fd = fileno(debug_file);
3619 f.background_daemon = FALSE;
3620 testharness_pause_ms(100); /* lets caller finish */
3621 if (debug_selector != D_v) /* -v only doesn't show this */
3623 debug_printf("Exim version %s uid=%ld gid=%ld pid=%d D=%x\n",
3624 version_string, (long int)real_uid, (long int)real_gid, (int)getpid(),
3626 if (!version_printed)
3627 show_whats_supported(stderr);
3631 /* When started with root privilege, ensure that the limits on the number of
3632 open files and the number of processes (where that is accessible) are
3633 sufficiently large, or are unset, in case Exim has been called from an
3634 environment where the limits are screwed down. Not all OS have the ability to
3635 change some of these limits. */
3639 DEBUG(D_any) debug_print_ids(US"Exim has no root privilege:");
3645 #ifdef RLIMIT_NOFILE
3646 if (getrlimit(RLIMIT_NOFILE, &rlp) < 0)
3648 log_write(0, LOG_MAIN|LOG_PANIC, "getrlimit(RLIMIT_NOFILE) failed: %s",
3650 rlp.rlim_cur = rlp.rlim_max = 0;
3653 /* I originally chose 1000 as a nice big number that was unlikely to
3654 be exceeded. It turns out that some older OS have a fixed upper limit of
3657 if (rlp.rlim_cur < 1000)
3659 rlp.rlim_cur = rlp.rlim_max = 1000;
3660 if (setrlimit(RLIMIT_NOFILE, &rlp) < 0)
3662 rlp.rlim_cur = rlp.rlim_max = 256;
3663 if (setrlimit(RLIMIT_NOFILE, &rlp) < 0)
3664 log_write(0, LOG_MAIN|LOG_PANIC, "setrlimit(RLIMIT_NOFILE) failed: %s",
3671 if (getrlimit(RLIMIT_NPROC, &rlp) < 0)
3673 log_write(0, LOG_MAIN|LOG_PANIC, "getrlimit(RLIMIT_NPROC) failed: %s",
3675 rlp.rlim_cur = rlp.rlim_max = 0;
3678 #ifdef RLIM_INFINITY
3679 if (rlp.rlim_cur != RLIM_INFINITY && rlp.rlim_cur < 1000)
3681 rlp.rlim_cur = rlp.rlim_max = RLIM_INFINITY;
3683 if (rlp.rlim_cur < 1000)
3685 rlp.rlim_cur = rlp.rlim_max = 1000;
3687 if (setrlimit(RLIMIT_NPROC, &rlp) < 0)
3688 log_write(0, LOG_MAIN|LOG_PANIC, "setrlimit(RLIMIT_NPROC) failed: %s",
3694 /* Exim is normally entered as root (but some special configurations are
3695 possible that don't do this). However, it always spins off sub-processes that
3696 set their uid and gid as required for local delivery. We don't want to pass on
3697 any extra groups that root may belong to, so we want to get rid of them all at
3700 We need to obey setgroups() at this stage, before possibly giving up root
3701 privilege for a changed configuration file, but later on we might need to
3702 check on the additional groups for the admin user privilege - can't do that
3703 till after reading the config, which might specify the exim gid. Therefore,
3704 save the group list here first. */
3706 if ((group_count = getgroups(nelem(group_list), group_list)) < 0)
3707 exim_fail("exim: getgroups() failed: %s\n", strerror(errno));
3709 /* There is a fundamental difference in some BSD systems in the matter of
3710 groups. FreeBSD and BSDI are known to be different; NetBSD and OpenBSD are
3711 known not to be different. On the "different" systems there is a single group
3712 list, and the first entry in it is the current group. On all other versions of
3713 Unix there is a supplementary group list, which is in *addition* to the current
3714 group. Consequently, to get rid of all extraneous groups on a "standard" system
3715 you pass over 0 groups to setgroups(), while on a "different" system you pass
3716 over a single group - the current group, which is always the first group in the
3717 list. Calling setgroups() with zero groups on a "different" system results in
3718 an error return. The following code should cope with both types of system.
3720 Unfortunately, recent MacOS, which should be a FreeBSD, "helpfully" succeeds
3721 the "setgroups() with zero groups" - and changes the egid.
3722 Thanks to that we had to stash the original_egid above, for use below
3723 in the call to exim_setugid().
3725 However, if this process isn't running as root, setgroups() can't be used
3726 since you have to be root to run it, even if throwing away groups.
3727 Except, sigh, for Hurd - where you can.
3728 Not being root here happens only in some unusual configurations. */
3731 #ifndef OS_SETGROUPS_ZERO_DROPS_ALL
3732 && setgroups(0, NULL) != 0
3734 && setgroups(1, group_list) != 0)
3735 exim_fail("exim: setgroups() failed: %s\n", strerror(errno));
3737 /* If the configuration file name has been altered by an argument on the
3738 command line (either a new file name or a macro definition) and the caller is
3739 not root, or if this is a filter testing run, remove any setuid privilege the
3740 program has and run as the underlying user.
3742 The exim user is locked out of this, which severely restricts the use of -C
3745 Otherwise, set the real ids to the effective values (should be root unless run
3746 from inetd, which it can either be root or the exim uid, if one is configured).
3748 There is a private mechanism for bypassing some of this, in order to make it
3749 possible to test lots of configurations automatically, without having either to
3750 recompile each time, or to patch in an actual configuration file name and other
3751 values (such as the path name). If running in the test harness, pretend that
3752 configuration file changes and macro definitions haven't happened. */
3755 (!f.trusted_config || /* Config changed, or */
3756 !macros_trusted(opt_D_used)) && /* impermissible macros and */
3757 real_uid != root_uid && /* Not root, and */
3758 !f.running_in_test_harness /* Not fudged */
3760 expansion_test /* expansion testing */
3762 filter_test != FTEST_NONE) /* Filter testing */
3764 setgroups(group_count, group_list);
3765 exim_setugid(real_uid, real_gid, FALSE,
3766 US"-C, -D, -be or -bf forces real uid");
3767 removed_privilege = TRUE;
3769 /* In the normal case when Exim is called like this, stderr is available
3770 and should be used for any logging information because attempts to write
3771 to the log will usually fail. To arrange this, we unset really_exim. However,
3772 if no stderr is available there is no point - we might as well have a go
3773 at the log (if it fails, syslog will be written).
3775 Note that if the invoker is Exim, the logs remain available. Messing with
3776 this causes unlogged successful deliveries. */
3778 if (log_stderr && real_uid != exim_uid)
3779 f.really_exim = FALSE;
3782 /* Privilege is to be retained for the moment. It may be dropped later,
3783 depending on the job that this Exim process has been asked to do. For now, set
3784 the real uid to the effective so that subsequent re-execs of Exim are done by a
3788 exim_setugid(geteuid(), original_egid, FALSE, US"forcing real = effective");
3790 /* If testing a filter, open the file(s) now, before wasting time doing other
3791 setups and reading the message. */
3793 if (filter_test & FTEST_SYSTEM)
3794 if ((filter_sfd = Uopen(filter_test_sfile, O_RDONLY, 0)) < 0)
3795 exim_fail("exim: failed to open %s: %s\n", filter_test_sfile,
3798 if (filter_test & FTEST_USER)
3799 if ((filter_ufd = Uopen(filter_test_ufile, O_RDONLY, 0)) < 0)
3800 exim_fail("exim: failed to open %s: %s\n", filter_test_ufile,
3803 /* Initialise lookup_list
3804 If debugging, already called above via version reporting.
3805 In either case, we initialise the list of available lookups while running
3806 as root. All dynamically modules are loaded from a directory which is
3807 hard-coded into the binary and is code which, if not a module, would be
3808 part of Exim already. Ability to modify the content of the directory
3809 is equivalent to the ability to modify a setuid binary!
3811 This needs to happen before we read the main configuration. */
3815 if (f.running_in_test_harness) smtputf8_advertise_hosts = NULL;
3818 /* Read the main runtime configuration data; this gives up if there
3819 is a failure. It leaves the configuration file open so that the subsequent
3820 configuration data for delivery can be read if needed.
3822 NOTE: immediately after opening the configuration file we change the working
3823 directory to "/"! Later we change to $spool_directory. We do it there, because
3824 during readconf_main() some expansion takes place already. */
3826 /* Store the initial cwd before we change directories. Can be NULL if the
3827 dir has already been unlinked. */
3828 initial_cwd = os_getcwd(NULL, 0);
3831 -be[m] expansion test -
3832 -b[fF] filter test new
3834 -bmalware malware_test_file new
3836 -brw rewrite test new
3838 -bv[s] address verify -
3840 -bP <option> (except -bP config, which sets list_config)
3842 If any of these options is set, we suppress warnings about configuration
3843 issues (currently about tls_advertise_hosts and keep_environment not being
3847 #ifdef MEASURE_TIMING
3848 struct timeval t0, diff;
3849 (void)gettimeofday(&t0, NULL);
3852 readconf_main(checking || list_options);
3854 #ifdef MEASURE_TIMING
3855 report_time_since(&t0, US"readconf_main (delta)");
3860 /* Now in directory "/" */
3862 if (cleanup_environment() == FALSE)
3863 log_write(0, LOG_PANIC_DIE, "Can't cleanup environment");
3866 /* If an action on specific messages is requested, or if a daemon or queue
3867 runner is being started, we need to know if Exim was called by an admin user.
3868 This is the case if the real user is root or exim, or if the real group is
3869 exim, or if one of the supplementary groups is exim or a group listed in
3870 admin_groups. We don't fail all message actions immediately if not admin_user,
3871 since some actions can be performed by non-admin users. Instead, set admin_user
3872 for later interrogation. */
3874 if (real_uid == root_uid || real_uid == exim_uid || real_gid == exim_gid)
3875 f.admin_user = TRUE;
3877 for (int i = 0; i < group_count && !f.admin_user; i++)
3878 if (group_list[i] == exim_gid)
3879 f.admin_user = TRUE;
3880 else if (admin_groups)
3881 for (int j = 1; j <= (int)admin_groups[0] && !f.admin_user; j++)
3882 if (admin_groups[j] == group_list[i])
3883 f.admin_user = TRUE;
3885 /* Another group of privileged users are the trusted users. These are root,
3886 exim, and any caller matching trusted_users or trusted_groups. Trusted callers
3887 are permitted to specify sender_addresses with -f on the command line, and
3888 other message parameters as well. */
3890 if (real_uid == root_uid || real_uid == exim_uid)
3891 f.trusted_caller = TRUE;
3895 for (int i = 1; i <= (int)trusted_users[0] && !f.trusted_caller; i++)
3896 if (trusted_users[i] == real_uid)
3897 f.trusted_caller = TRUE;
3900 for (int i = 1; i <= (int)trusted_groups[0] && !f.trusted_caller; i++)
3901 if (trusted_groups[i] == real_gid)
3902 f.trusted_caller = TRUE;
3903 else for (int j = 0; j < group_count && !f.trusted_caller; j++)
3904 if (trusted_groups[i] == group_list[j])
3905 f.trusted_caller = TRUE;
3908 /* At this point, we know if the user is privileged and some command-line
3909 options become possibly impermissible, depending upon the configuration file. */
3911 if (checking && commandline_checks_require_admin && !f.admin_user)
3912 exim_fail("exim: those command-line flags are set to require admin\n");
3914 /* Handle the decoding of logging options. */
3916 decode_bits(log_selector, log_selector_size, log_notall,
3917 log_selector_string, log_options, log_options_count, US"log", 0);
3921 debug_printf("configuration file is %s\n", config_main_filename);
3922 debug_printf("log selectors =");
3923 for (int i = 0; i < log_selector_size; i++)
3924 debug_printf(" %08x", log_selector[i]);
3928 /* If domain literals are not allowed, check the sender address that was
3929 supplied with -f. Ditto for a stripped trailing dot. */
3933 if (sender_address[sender_address_domain] == '[' && !allow_domain_literals)
3934 exim_fail("exim: bad -f address \"%s\": domain literals not "
3935 "allowed\n", sender_address);
3936 if (f_end_dot && !strip_trailing_dot)
3937 exim_fail("exim: bad -f address \"%s.\": domain is malformed "
3938 "(trailing dot not allowed)\n", sender_address);
3941 /* See if an admin user overrode our logging. */
3943 if (cmdline_syslog_name)
3946 syslog_processname = cmdline_syslog_name;
3947 log_file_path = string_copy(CUS"syslog");
3950 /* not a panic, non-privileged users should not be able to spam paniclog */
3952 "exim: you lack sufficient privilege to specify syslog process name\n");
3954 /* Paranoia check of maximum lengths of certain strings. There is a check
3955 on the length of the log file path in log.c, which will come into effect
3956 if there are any calls to write the log earlier than this. However, if we
3957 get this far but the string is very long, it is better to stop now than to
3958 carry on and (e.g.) receive a message and then have to collapse. The call to
3959 log_write() from here will cause the ultimate panic collapse if the complete
3960 file name exceeds the buffer length. */
3962 if (Ustrlen(log_file_path) > 200)
3963 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3964 "log_file_path is longer than 200 chars: aborting");
3966 if (Ustrlen(pid_file_path) > 200)
3967 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3968 "pid_file_path is longer than 200 chars: aborting");
3970 if (Ustrlen(spool_directory) > 200)
3971 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3972 "spool_directory is longer than 200 chars: aborting");
3974 /* Length check on the process name given to syslog for its TAG field,
3975 which is only permitted to be 32 characters or less. See RFC 3164. */
3977 if (Ustrlen(syslog_processname) > 32)
3978 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3979 "syslog_processname is longer than 32 chars: aborting");
3984 log_write(0, LOG_MAIN, "%s", log_oneline);
3985 return EXIT_SUCCESS;
3988 return EXIT_FAILURE;
3990 /* In some operating systems, the environment variable TMPDIR controls where
3991 temporary files are created; Exim doesn't use these (apart from when delivering
3992 to MBX mailboxes), but called libraries such as DBM libraries may require them.
3993 If TMPDIR is found in the environment, reset it to the value defined in the
3994 EXIM_TMPDIR macro, if this macro is defined. For backward compatibility this
3995 macro may be called TMPDIR in old "Local/Makefile"s. It's converted to
3996 EXIM_TMPDIR by the build scripts.
4000 if (environ) for (uschar ** p = USS environ; *p; p++)
4001 if (Ustrncmp(*p, "TMPDIR=", 7) == 0 && Ustrcmp(*p+7, EXIM_TMPDIR) != 0)
4003 uschar * newp = store_malloc(Ustrlen(EXIM_TMPDIR) + 8);
4004 sprintf(CS newp, "TMPDIR=%s", EXIM_TMPDIR);
4006 DEBUG(D_any) debug_printf("reset TMPDIR=%s in environment\n", EXIM_TMPDIR);
4010 /* Timezone handling. If timezone_string is "utc", set a flag to cause all
4011 timestamps to be in UTC (gmtime() is used instead of localtime()). Otherwise,
4012 we may need to get rid of a bogus timezone setting. This can arise when Exim is
4013 called by a user who has set the TZ variable. This then affects the timestamps
4014 in log files and in Received: headers, and any created Date: header lines. The
4015 required timezone is settable in the configuration file, so nothing can be done
4016 about this earlier - but hopefully nothing will normally be logged earlier than
4017 this. We have to make a new environment if TZ is wrong, but don't bother if
4018 timestamps_utc is set, because then all times are in UTC anyway. */
4020 if (timezone_string && strcmpic(timezone_string, US"UTC") == 0)
4021 f.timestamps_utc = TRUE;
4024 uschar *envtz = US getenv("TZ");
4026 ? !timezone_string || Ustrcmp(timezone_string, envtz) != 0
4027 : timezone_string != NULL
4030 uschar **p = USS environ;
4034 if (environ) while (*p++) count++;
4035 if (!envtz) count++;
4036 newp = new = store_malloc(sizeof(uschar *) * (count + 1));
4037 if (environ) for (p = USS environ; *p; p++)
4038 if (Ustrncmp(*p, "TZ=", 3) != 0) *newp++ = *p;
4039 if (timezone_string)
4041 *newp = store_malloc(Ustrlen(timezone_string) + 4);
4042 sprintf(CS *newp++, "TZ=%s", timezone_string);
4047 DEBUG(D_any) debug_printf("Reset TZ to %s: time is %s\n", timezone_string,
4048 tod_stamp(tod_log));
4052 /* Handle the case when we have removed the setuid privilege because of -C or
4053 -D. This means that the caller of Exim was not root.
4055 There is a problem if we were running as the Exim user. The sysadmin may
4056 expect this case to retain privilege because "the binary was called by the
4057 Exim user", but it hasn't, because either the -D option set macros, or the
4058 -C option set a non-trusted configuration file. There are two possibilities:
4060 (1) If deliver_drop_privilege is set, Exim is not going to re-exec in order
4061 to do message deliveries. Thus, the fact that it is running as a
4062 non-privileged user is plausible, and might be wanted in some special
4063 configurations. However, really_exim will have been set false when
4064 privilege was dropped, to stop Exim trying to write to its normal log
4065 files. Therefore, re-enable normal log processing, assuming the sysadmin
4066 has set up the log directory correctly.
4068 (2) If deliver_drop_privilege is not set, the configuration won't work as
4069 apparently intended, and so we log a panic message. In order to retain
4070 root for -C or -D, the caller must either be root or be invoking a
4071 trusted configuration file (when deliver_drop_privilege is false). */
4073 if ( removed_privilege
4074 && (!f.trusted_config || opt_D_used)
4075 && real_uid == exim_uid)
4076 if (deliver_drop_privilege)
4077 f.really_exim = TRUE; /* let logging work normally */
4079 log_write(0, LOG_MAIN|LOG_PANIC,
4080 "exim user lost privilege for using %s option",
4081 f.trusted_config? "-D" : "-C");
4083 /* Start up Perl interpreter if Perl support is configured and there is a
4084 perl_startup option, and the configuration or the command line specifies
4085 initializing starting. Note that the global variables are actually called
4086 opt_perl_xxx to avoid clashing with perl's namespace (perl_*). */
4089 if (perl_start_option != 0)
4090 opt_perl_at_start = (perl_start_option > 0);
4091 if (opt_perl_at_start && opt_perl_startup != NULL)
4094 DEBUG(D_any) debug_printf("Starting Perl interpreter\n");
4095 if ((errstr = init_perl(opt_perl_startup)))
4096 exim_fail("exim: error in perl_startup code: %s\n", errstr);
4097 opt_perl_started = TRUE;
4099 #endif /* EXIM_PERL */
4101 /* Log the arguments of the call if the configuration file said so. This is
4102 a debugging feature for finding out what arguments certain MUAs actually use.
4103 Don't attempt it if logging is disabled, or if listing variables or if
4104 verifying/testing addresses or expansions. */
4106 if ( (debug_selector & D_any || LOGGING(arguments))
4107 && f.really_exim && !list_options && !checking)
4109 uschar *p = big_buffer;
4110 Ustrcpy(p, US"cwd= (failed)");
4116 Ustrncpy(p + 4, initial_cwd, big_buffer_size-5);
4117 p += 4 + Ustrlen(initial_cwd);
4118 /* in case p is near the end and we don't provide enough space for
4119 * string_format to be willing to write. */
4123 (void)string_format(p, big_buffer_size - (p - big_buffer), " %d args:", argc);
4125 for (int i = 0; i < argc; i++)
4127 int len = Ustrlen(argv[i]);
4128 const uschar *printing;
4130 if (p + len + 8 >= big_buffer + big_buffer_size)
4132 Ustrcpy(p, US" ...");
4133 log_write(0, LOG_MAIN, "%s", big_buffer);
4134 Ustrcpy(big_buffer, US"...");
4137 printing = string_printing(argv[i]);
4138 if (!*printing) quote = US"\"";
4141 const uschar *pp = printing;
4143 while (*pp) if (isspace(*pp++)) { quote = US"\""; break; }
4145 p += sprintf(CS p, " %s%.*s%s", quote, (int)(big_buffer_size -
4146 (p - big_buffer) - 4), printing, quote);
4149 if (LOGGING(arguments))
4150 log_write(0, LOG_MAIN, "%s", big_buffer);
4152 debug_printf("%s\n", big_buffer);
4155 /* Set the working directory to be the top-level spool directory. We don't rely
4156 on this in the code, which always uses fully qualified names, but it's useful
4157 for core dumps etc. Don't complain if it fails - the spool directory might not
4158 be generally accessible and calls with the -C option (and others) have lost
4159 privilege by now. Before the chdir, we try to ensure that the directory exists.
4162 if (Uchdir(spool_directory) != 0)
4165 (void)directory_make(spool_directory, US"", SPOOL_DIRECTORY_MODE, FALSE);
4166 dummy = /* quieten compiler */ Uchdir(spool_directory);
4167 dummy = dummy; /* yet more compiler quietening, sigh */
4170 /* Handle calls with the -bi option. This is a sendmail option to rebuild *the*
4171 alias file. Exim doesn't have such a concept, but this call is screwed into
4172 Sun's YP makefiles. Handle this by calling a configured script, as the real
4173 user who called Exim. The -oA option can be used to pass an argument to the
4178 (void)fclose(config_file);
4183 argv[i++] = bi_command;
4184 if (alias_arg) argv[i++] = alias_arg;
4187 setgroups(group_count, group_list);
4188 exim_setugid(real_uid, real_gid, FALSE, US"running bi_command");
4190 DEBUG(D_exec) debug_printf("exec %.256s %.256s\n", argv[0],
4191 argv[1] ? argv[1] : US"");
4193 execv(CS argv[0], (char *const *)argv);
4194 exim_fail("exim: exec failed: %s\n", strerror(errno));
4198 DEBUG(D_any) debug_printf("-bi used but bi_command not set; exiting\n");
4203 /* We moved the admin/trusted check to be immediately after reading the
4204 configuration file. We leave these prints here to ensure that syslog setup,
4205 logfile setup, and so on has already happened. */
4207 if (f.trusted_caller) DEBUG(D_any) debug_printf("trusted user\n");
4208 if (f.admin_user) DEBUG(D_any) debug_printf("admin user\n");
4210 /* Only an admin user may start the daemon or force a queue run in the default
4211 configuration, but the queue run restriction can be relaxed. Only an admin
4212 user may request that a message be returned to its sender forthwith. Only an
4213 admin user may specify a debug level greater than D_v (because it might show
4214 passwords, etc. in lookup queries). Only an admin user may request a queue
4215 count. Only an admin user can use the test interface to scan for email
4216 (because Exim will be in the spool dir and able to look at mails). */
4220 BOOL debugset = (debug_selector & ~D_v) != 0;
4221 if ( deliver_give_up || f.daemon_listen || malware_test_file
4222 || count_queue && queue_list_requires_admin
4223 || list_queue && queue_list_requires_admin
4224 || queue_interval >= 0 && prod_requires_admin
4225 || queue_name_dest && prod_requires_admin
4226 || debugset && !f.running_in_test_harness
4228 exim_fail("exim:%s permission denied\n", debugset? " debugging" : "");
4231 /* If the real user is not root or the exim uid, the argument for passing
4232 in an open TCP/IP connection for another message is not permitted, nor is
4233 running with the -N option for any delivery action, unless this call to exim is
4234 one that supplied an input message, or we are using a patched exim for
4235 regression testing. */
4237 if (real_uid != root_uid && real_uid != exim_uid &&
4238 (continue_hostname != NULL ||
4240 (queue_interval >= 0 || f.daemon_listen || msg_action_arg > 0)
4241 )) && !f.running_in_test_harness)
4242 exim_fail("exim: Permission denied\n");
4244 /* If the caller is not trusted, certain arguments are ignored when running for
4245 real, but are permitted when checking things (-be, -bv, -bt, -bh, -bf, -bF).
4246 Note that authority for performing certain actions on messages is tested in the
4247 queue_action() function. */
4249 if (!f.trusted_caller && !checking)
4251 sender_host_name = sender_host_address = interface_address =
4252 sender_ident = received_protocol = NULL;
4253 sender_host_port = interface_port = 0;
4254 sender_host_authenticated = authenticated_sender = authenticated_id = NULL;
4257 /* If a sender host address is set, extract the optional port number off the
4258 end of it and check its syntax. Do the same thing for the interface address.
4259 Exim exits if the syntax is bad. */
4263 if (sender_host_address != NULL)
4264 sender_host_port = check_port(sender_host_address);
4265 if (interface_address != NULL)
4266 interface_port = check_port(interface_address);
4269 /* If the caller is trusted, then they can use -G to suppress_local_fixups. */
4272 if (f.trusted_caller)
4274 f.suppress_local_fixups = f.suppress_local_fixups_default = TRUE;
4275 DEBUG(D_acl) debug_printf("suppress_local_fixups forced on by -G\n");
4278 exim_fail("exim: permission denied (-G requires a trusted user)\n");
4281 /* If an SMTP message is being received check to see if the standard input is a
4282 TCP/IP socket. If it is, we assume that Exim was called from inetd if the
4283 caller is root or the Exim user, or if the port is a privileged one. Otherwise,
4288 union sockaddr_46 inetd_sock;
4289 EXIM_SOCKLEN_T size = sizeof(inetd_sock);
4290 if (getpeername(0, (struct sockaddr *)(&inetd_sock), &size) == 0)
4292 int family = ((struct sockaddr *)(&inetd_sock))->sa_family;
4293 if (family == AF_INET || family == AF_INET6)
4295 union sockaddr_46 interface_sock;
4296 size = sizeof(interface_sock);
4298 if (getsockname(0, (struct sockaddr *)(&interface_sock), &size) == 0)
4299 interface_address = host_ntoa(-1, &interface_sock, NULL,
4302 if (host_is_tls_on_connect_port(interface_port)) tls_in.on_connect = TRUE;
4304 if (real_uid == root_uid || real_uid == exim_uid || interface_port < 1024)
4307 sender_host_address = host_ntoa(-1, (struct sockaddr *)(&inetd_sock),
4308 NULL, &sender_host_port);
4309 if (mua_wrapper) log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Input from "
4310 "inetd is not supported when mua_wrapper is set");
4314 "exim: Permission denied (unprivileged user, unprivileged port)\n");
4319 /* If the load average is going to be needed while receiving a message, get it
4320 now for those OS that require the first call to os_getloadavg() to be done as
4321 root. There will be further calls later for each message received. */
4323 #ifdef LOAD_AVG_NEEDS_ROOT
4324 if ( receiving_message
4325 && (queue_only_load >= 0 || (f.is_inetd && smtp_load_reserve >= 0)))
4326 load_average = OS_GETLOADAVG();
4329 /* The queue_only configuration option can be overridden by -odx on the command
4330 line, except that if queue_only_override is false, queue_only cannot be unset
4331 from the command line. */
4333 if (queue_only_set && (queue_only_override || arg_queue_only))
4334 queue_only = arg_queue_only;
4336 /* The receive_timeout and smtp_receive_timeout options can be overridden by
4339 if (arg_receive_timeout >= 0) receive_timeout = arg_receive_timeout;
4340 if (arg_smtp_receive_timeout >= 0)
4341 smtp_receive_timeout = arg_smtp_receive_timeout;
4343 /* If Exim was started with root privilege, unless we have already removed the
4344 root privilege above as a result of -C, -D, -be, -bf or -bF, remove it now
4345 except when starting the daemon or doing some kind of delivery or address
4346 testing (-bt). These are the only cases when root need to be retained. We run
4347 as exim for -bv and -bh. However, if deliver_drop_privilege is set, root is
4348 retained only for starting the daemon. We always do the initgroups() in this
4349 situation (controlled by the TRUE below), in order to be as close as possible
4350 to the state Exim usually runs in. */
4352 if (!unprivileged && /* originally had root AND */
4353 !removed_privilege && /* still got root AND */
4354 !f.daemon_listen && /* not starting the daemon */
4355 queue_interval <= 0 && /* (either kind of daemon) */
4357 deliver_drop_privilege || /* requested unprivileged */
4359 queue_interval < 0 && /* not running the queue */
4360 (msg_action_arg < 0 || /* and */
4361 msg_action != MSG_DELIVER) && /* not delivering and */
4362 (!checking || !f.address_test_mode) /* not address checking */
4364 exim_setugid(exim_uid, exim_gid, TRUE, US"privilege not needed");
4366 /* When we are retaining a privileged uid, we still change to the exim gid. */
4371 DEBUG(D_any) debug_printf("dropping to exim gid; retaining priv uid\n");
4372 rv = setgid(exim_gid);
4373 /* Impact of failure is that some stuff might end up with an incorrect group.
4374 We track this for failures from root, since any attempt to change privilege
4375 by root should succeed and failures should be examined. For non-root,
4376 there's no security risk. For me, it's { exim -bV } on a just-built binary,
4377 no need to complain then. */
4379 if (!(unprivileged || removed_privilege))
4380 exim_fail("exim: changing group failed: %s\n", strerror(errno));
4383 DEBUG(D_any) debug_printf("changing group to %ld failed: %s\n",
4384 (long int)exim_gid, strerror(errno));
4388 /* Handle a request to scan a file for malware */
4389 if (malware_test_file)
4391 #ifdef WITH_CONTENT_SCAN
4393 set_process_info("scanning file for malware");
4394 result = malware_in_file(malware_test_file);
4397 printf("No malware found.\n");
4402 printf("Malware lookup returned non-okay/fail: %d\n", result);
4406 printf("Malware found: %s\n", malware_name);
4408 printf("Malware scan detected malware of unknown name.\n");
4410 printf("Malware scanning not enabled at compile time.\n");
4415 /* Handle a request to list the delivery queue */
4419 set_process_info("listing the queue");
4420 queue_list(list_queue_option, argv + recipients_arg, argc - recipients_arg);
4424 /* Handle a request to count the delivery queue */
4428 set_process_info("counting the queue");
4429 fprintf(stdout, "%u\n", queue_count());
4433 /* Handle actions on specific messages, except for the force delivery and
4434 message load actions, which are done below. Some actions take a whole list of
4435 message ids, which are known to continue up to the end of the arguments. Others
4436 take a single message id and then operate on the recipients list. */
4438 if (msg_action_arg > 0 && msg_action != MSG_DELIVER && msg_action != MSG_LOAD)
4440 int yield = EXIT_SUCCESS;
4441 set_process_info("acting on specified messages");
4443 /* ACL definitions may be needed when removing a message (-Mrm) because
4444 event_action gets expanded */
4446 if (msg_action == MSG_REMOVE)
4449 if (!one_msg_action)
4451 for (i = msg_action_arg; i < argc; i++)
4452 if (!queue_action(argv[i], msg_action, NULL, 0, 0))
4453 yield = EXIT_FAILURE;
4456 case MSG_REMOVE: case MSG_FREEZE: case MSG_THAW: break;
4457 default: printf("\n"); break;
4461 else if (!queue_action(argv[msg_action_arg], msg_action, argv, argc,
4462 recipients_arg)) yield = EXIT_FAILURE;
4466 /* We used to set up here to skip reading the ACL section, on
4467 (msg_action_arg > 0 || (queue_interval == 0 && !f.daemon_listen)
4468 Now, since the intro of the ${acl } expansion, ACL definitions may be
4469 needed in transports so we lost the optimisation. */
4472 #ifdef MEASURE_TIMING
4473 struct timeval t0, diff;
4474 (void)gettimeofday(&t0, NULL);
4479 #ifdef MEASURE_TIMING
4480 report_time_since(&t0, US"readconf_rest (delta)");
4484 /* Handle the -brt option. This is for checking out retry configurations.
4485 The next three arguments are a domain name or a complete address, and
4486 optionally two error numbers. All it does is to call the function that
4487 scans the retry configuration data. */
4489 if (test_retry_arg >= 0)
4491 retry_config *yield;
4492 int basic_errno = 0;
4496 if (test_retry_arg >= argc)
4498 printf("-brt needs a domain or address argument\n");
4499 exim_exit(EXIT_FAILURE);
4501 s1 = argv[test_retry_arg++];
4504 /* If the first argument contains no @ and no . it might be a local user
4505 or it might be a single-component name. Treat as a domain. */
4507 if (Ustrchr(s1, '@') == NULL && Ustrchr(s1, '.') == NULL)
4509 printf("Warning: \"%s\" contains no '@' and no '.' characters. It is "
4510 "being \ntreated as a one-component domain, not as a local part.\n\n",
4514 /* There may be an optional second domain arg. */
4516 if (test_retry_arg < argc && Ustrchr(argv[test_retry_arg], '.') != NULL)
4517 s2 = argv[test_retry_arg++];
4519 /* The final arg is an error name */
4521 if (test_retry_arg < argc)
4523 uschar *ss = argv[test_retry_arg];
4525 readconf_retry_error(ss, ss + Ustrlen(ss), &basic_errno, &more_errno);
4528 printf("%s\n", CS error);
4529 return EXIT_FAILURE;
4532 /* For the {MAIL,RCPT,DATA}_4xx errors, a value of 255 means "any", and a
4533 code > 100 as an error is for matching codes to the decade. Turn them into
4534 a real error code, off the decade. */
4536 if (basic_errno == ERRNO_MAIL4XX ||
4537 basic_errno == ERRNO_RCPT4XX ||
4538 basic_errno == ERRNO_DATA4XX)
4540 int code = (more_errno >> 8) & 255;
4542 more_errno = (more_errno & 0xffff00ff) | (21 << 8);
4543 else if (code > 100)
4544 more_errno = (more_errno & 0xffff00ff) | ((code - 96) << 8);
4548 if (!(yield = retry_find_config(s1, s2, basic_errno, more_errno)))
4549 printf("No retry information found\n");
4552 more_errno = yield->more_errno;
4553 printf("Retry rule: %s ", yield->pattern);
4555 if (yield->basic_errno == ERRNO_EXIMQUOTA)
4557 printf("quota%s%s ",
4558 (more_errno > 0)? "_" : "",
4559 (more_errno > 0)? readconf_printtime(more_errno) : US"");
4561 else if (yield->basic_errno == ECONNREFUSED)
4563 printf("refused%s%s ",
4564 (more_errno > 0)? "_" : "",
4565 (more_errno == 'M')? "MX" :
4566 (more_errno == 'A')? "A" : "");
4568 else if (yield->basic_errno == ETIMEDOUT)
4571 if ((more_errno & RTEF_CTOUT) != 0) printf("_connect");
4573 if (more_errno != 0) printf("_%s",
4574 (more_errno == 'M')? "MX" : "A");
4577 else if (yield->basic_errno == ERRNO_AUTHFAIL)
4578 printf("auth_failed ");
4581 for (retry_rule * r = yield->rules; r; r = r->next)
4583 printf("%c,%s", r->rule, readconf_printtime(r->timeout)); /* Do not */
4584 printf(",%s", readconf_printtime(r->p1)); /* amalgamate */
4590 printf(",%d.", x/1000);
4604 exim_exit(EXIT_SUCCESS);
4607 /* Handle a request to list one or more configuration options */
4608 /* If -n was set, we suppress some information */
4613 set_process_info("listing variables");
4614 if (recipients_arg >= argc)
4615 fail = !readconf_print(US"all", NULL, flag_n);
4616 else for (i = recipients_arg; i < argc; i++)
4619 (Ustrcmp(argv[i], "router") == 0 ||
4620 Ustrcmp(argv[i], "transport") == 0 ||
4621 Ustrcmp(argv[i], "authenticator") == 0 ||
4622 Ustrcmp(argv[i], "macro") == 0 ||
4623 Ustrcmp(argv[i], "environment") == 0))
4625 fail |= !readconf_print(argv[i+1], argv[i], flag_n);
4629 fail = !readconf_print(argv[i], NULL, flag_n);
4631 exim_exit(fail ? EXIT_FAILURE : EXIT_SUCCESS);
4636 set_process_info("listing config");
4637 exim_exit(readconf_print(US"config", NULL, flag_n)
4638 ? EXIT_SUCCESS : EXIT_FAILURE);
4642 /* Initialise subsystems as required. */
4646 /* Handle a request to deliver one or more messages that are already on the
4647 queue. Values of msg_action other than MSG_DELIVER and MSG_LOAD are dealt with
4648 above. MSG_LOAD is handled with -be (which is the only time it applies) below.
4650 Delivery of specific messages is typically used for a small number when
4651 prodding by hand (when the option forced_delivery will be set) or when
4652 re-execing to regain root privilege. Each message delivery must happen in a
4653 separate process, so we fork a process for each one, and run them sequentially
4654 so that debugging output doesn't get intertwined, and to avoid spawning too
4655 many processes if a long list is given. However, don't fork for the last one;
4656 this saves a process in the common case when Exim is called to deliver just one
4659 if (msg_action_arg > 0 && msg_action != MSG_LOAD)
4661 if (prod_requires_admin && !f.admin_user)
4663 fprintf(stderr, "exim: Permission denied\n");
4664 exim_exit(EXIT_FAILURE);
4666 set_process_info("delivering specified messages");
4667 if (deliver_give_up) forced_delivery = f.deliver_force_thaw = TRUE;
4668 for (i = msg_action_arg; i < argc; i++)
4672 /*XXX This use of argv[i] for msg_id should really be tainted, but doing
4673 that runs into a later copy into the untainted global message_id[] */
4675 (void)deliver_message(argv[i], forced_delivery, deliver_give_up);
4676 else if ((pid = exim_fork(US"cmdline-delivery")) == 0)
4678 (void)deliver_message(argv[i], forced_delivery, deliver_give_up);
4679 exim_underbar_exit(EXIT_SUCCESS);
4683 fprintf(stderr, "failed to fork delivery process for %s: %s\n", argv[i],
4685 exim_exit(EXIT_FAILURE);
4689 exim_exit(EXIT_SUCCESS);
4693 /* If only a single queue run is requested, without SMTP listening, we can just
4694 turn into a queue runner, with an optional starting message id. */
4696 if (queue_interval == 0 && !f.daemon_listen)
4698 DEBUG(D_queue_run) debug_printf("Single queue run%s%s%s%s\n",
4699 start_queue_run_id ? US" starting at " : US"",
4700 start_queue_run_id ? start_queue_run_id: US"",
4701 stop_queue_run_id ? US" stopping at " : US"",
4702 stop_queue_run_id ? stop_queue_run_id : US"");
4704 set_process_info("running the '%s' queue (single queue run)", queue_name);
4706 set_process_info("running the queue (single queue run)");
4707 queue_run(start_queue_run_id, stop_queue_run_id, FALSE);
4708 exim_exit(EXIT_SUCCESS);
4712 /* Find the login name of the real user running this process. This is always
4713 needed when receiving a message, because it is written into the spool file. It
4714 may also be used to construct a from: or a sender: header, and in this case we
4715 need the user's full name as well, so save a copy of it, checked for RFC822
4716 syntax and munged if necessary, if it hasn't previously been set by the -F
4717 argument. We may try to get the passwd entry more than once, in case NIS or
4718 other delays are in evidence. Save the home directory for use in filter testing
4723 if ((pw = getpwuid(real_uid)) != NULL)
4725 originator_login = string_copy(US pw->pw_name);
4726 originator_home = string_copy(US pw->pw_dir);
4728 /* If user name has not been set by -F, set it from the passwd entry
4729 unless -f has been used to set the sender address by a trusted user. */
4731 if (!originator_name)
4733 if (!sender_address || (!f.trusted_caller && filter_test == FTEST_NONE))
4735 uschar *name = US pw->pw_gecos;
4736 uschar *amp = Ustrchr(name, '&');
4739 /* Most Unix specify that a '&' character in the gecos field is
4740 replaced by a copy of the login name, and some even specify that
4741 the first character should be upper cased, so that's what we do. */
4746 string_format(buffer, sizeof(buffer), "%.*s%n%s%s",
4747 (int)(amp - name), name, &loffset, originator_login, amp + 1);
4748 buffer[loffset] = toupper(buffer[loffset]);
4752 /* If a pattern for matching the gecos field was supplied, apply
4753 it and then expand the name string. */
4755 if (gecos_pattern && gecos_name)
4758 re = regex_must_compile(gecos_pattern, FALSE, TRUE); /* Use malloc */
4760 if (regex_match_and_setup(re, name, 0, -1))
4762 uschar *new_name = expand_string(gecos_name);
4766 DEBUG(D_receive) debug_printf("user name \"%s\" extracted from "
4767 "gecos field \"%s\"\n", new_name, name);
4770 else DEBUG(D_receive) debug_printf("failed to expand gecos_name string "
4771 "\"%s\": %s\n", gecos_name, expand_string_message);
4773 else DEBUG(D_receive) debug_printf("gecos_pattern \"%s\" did not match "
4774 "gecos field \"%s\"\n", gecos_pattern, name);
4775 store_free((void *)re);
4777 originator_name = string_copy(name);
4780 /* A trusted caller has used -f but not -F */
4782 else originator_name = US"";
4785 /* Break the retry loop */
4790 if (++i > finduser_retries) break;
4794 /* If we cannot get a user login, log the incident and give up, unless the
4795 configuration specifies something to use. When running in the test harness,
4796 any setting of unknown_login overrides the actual name. */
4798 if (originator_login == NULL || f.running_in_test_harness)
4800 if (unknown_login != NULL)
4802 originator_login = expand_string(unknown_login);
4803 if (originator_name == NULL && unknown_username != NULL)
4804 originator_name = expand_string(unknown_username);
4805 if (originator_name == NULL) originator_name = US"";
4807 if (originator_login == NULL)
4808 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Failed to get user name for uid %d",
4812 /* Ensure that the user name is in a suitable form for use as a "phrase" in an
4815 originator_name = parse_fix_phrase(originator_name, Ustrlen(originator_name));
4817 /* If a message is created by this call of Exim, the uid/gid of its originator
4818 are those of the caller. These values are overridden if an existing message is
4819 read in from the spool. */
4821 originator_uid = real_uid;
4822 originator_gid = real_gid;
4824 DEBUG(D_receive) debug_printf("originator: uid=%d gid=%d login=%s name=%s\n",
4825 (int)originator_uid, (int)originator_gid, originator_login, originator_name);
4827 /* Run in daemon and/or queue-running mode. The function daemon_go() never
4828 returns. We leave this till here so that the originator_ fields are available
4829 for incoming messages via the daemon. The daemon cannot be run in mua_wrapper
4832 if (f.daemon_listen || f.inetd_wait_mode || queue_interval > 0)
4836 fprintf(stderr, "Daemon cannot be run when mua_wrapper is set\n");
4837 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Daemon cannot be run when "
4838 "mua_wrapper is set");
4841 # ifndef DISABLE_TLS
4842 /* This also checks that the library linkage is working and we can call
4843 routines in it, so call even if tls_require_ciphers is unset */
4845 # ifdef MEASURE_TIMING
4846 struct timeval t0, diff;
4847 (void)gettimeofday(&t0, NULL);
4849 if (!tls_dropprivs_validate_require_cipher(FALSE))
4851 # ifdef MEASURE_TIMING
4852 report_time_since(&t0, US"validate_ciphers (delta)");
4860 /* If the sender ident has not been set (by a trusted caller) set it to
4861 the caller. This will get overwritten below for an inetd call. If a trusted
4862 caller has set it empty, unset it. */
4864 if (!sender_ident) sender_ident = originator_login;
4865 else if (!*sender_ident) sender_ident = NULL;
4867 /* Handle the -brw option, which is for checking out rewriting rules. Cause log
4868 writes (on errors) to go to stderr instead. Can't do this earlier, as want the
4869 originator_* variables set. */
4871 if (test_rewrite_arg >= 0)
4873 f.really_exim = FALSE;
4874 if (test_rewrite_arg >= argc)
4876 printf("-brw needs an address argument\n");
4877 exim_exit(EXIT_FAILURE);
4879 rewrite_test(argv[test_rewrite_arg]);
4880 exim_exit(EXIT_SUCCESS);
4883 /* A locally-supplied message is considered to be coming from a local user
4884 unless a trusted caller supplies a sender address with -f, or is passing in the
4885 message via SMTP (inetd invocation or otherwise). */
4887 if ( !sender_address && !smtp_input
4888 || !f.trusted_caller && filter_test == FTEST_NONE)
4890 f.sender_local = TRUE;
4892 /* A trusted caller can supply authenticated_sender and authenticated_id
4893 via -oMas and -oMai and if so, they will already be set. Otherwise, force
4894 defaults except when host checking. */
4896 if (!authenticated_sender && !host_checking)
4897 authenticated_sender = string_sprintf("%s@%s", originator_login,
4898 qualify_domain_sender);
4899 if (!authenticated_id && !host_checking)
4900 authenticated_id = originator_login;
4903 /* Trusted callers are always permitted to specify the sender address.
4904 Untrusted callers may specify it if it matches untrusted_set_sender, or if what
4905 is specified is the empty address. However, if a trusted caller does not
4906 specify a sender address for SMTP input, we leave sender_address unset. This
4907 causes the MAIL commands to be honoured. */
4909 if ( !smtp_input && !sender_address
4910 || !receive_check_set_sender(sender_address))
4912 /* Either the caller is not permitted to set a general sender, or this is
4913 non-SMTP input and the trusted caller has not set a sender. If there is no
4914 sender, or if a sender other than <> is set, override with the originator's
4915 login (which will get qualified below), except when checking things. */
4917 if (sender_address == NULL /* No sender_address set */
4919 (sender_address[0] != 0 && /* Non-empty sender address, AND */
4920 !checking)) /* Not running tests, including filter tests */
4922 sender_address = originator_login;
4923 f.sender_address_forced = FALSE;
4924 sender_address_domain = 0;
4928 /* Remember whether an untrusted caller set the sender address */
4930 f.sender_set_untrusted = sender_address != originator_login && !f.trusted_caller;
4932 /* Ensure that the sender address is fully qualified unless it is the empty
4933 address, which indicates an error message, or doesn't exist (root caller, smtp
4934 interface, no -f argument). */
4936 if (sender_address && *sender_address && sender_address_domain == 0)
4937 sender_address = string_sprintf("%s@%s", local_part_quote(sender_address),
4938 qualify_domain_sender);
4940 DEBUG(D_receive) debug_printf("sender address = %s\n", sender_address);
4942 /* Handle a request to verify a list of addresses, or test them for delivery.
4943 This must follow the setting of the sender address, since routers can be
4944 predicated upon the sender. If no arguments are given, read addresses from
4945 stdin. Set debug_level to at least D_v to get full output for address testing.
4948 if (verify_address_mode || f.address_test_mode)
4951 int flags = vopt_qualify;
4953 if (verify_address_mode)
4955 if (!verify_as_sender) flags |= vopt_is_recipient;
4956 DEBUG(D_verify) debug_print_ids(US"Verifying:");
4961 flags |= vopt_is_recipient;
4962 debug_selector |= D_v;
4963 debug_file = stderr;
4964 debug_fd = fileno(debug_file);
4965 DEBUG(D_verify) debug_print_ids(US"Address testing:");
4968 if (recipients_arg < argc)
4970 while (recipients_arg < argc)
4972 /* Supplied addresses are tainted since they come from a user */
4973 uschar * s = string_copy_taint(argv[recipients_arg++], TRUE);
4976 BOOL finished = FALSE;
4977 uschar *ss = parse_find_address_end(s, FALSE);
4978 if (*ss == ',') *ss = 0; else finished = TRUE;
4979 test_address(s, flags, &exit_value);
4982 while (*++s == ',' || isspace(*s)) ;
4989 uschar * s = get_stdinput(NULL, NULL);
4991 test_address(string_copy_taint(s, TRUE), flags, &exit_value);
4995 exim_exit(exit_value);
4998 /* Handle expansion checking. Either expand items on the command line, or read
4999 from stdin if there aren't any. If -Mset was specified, load the message so
5000 that its variables can be used, but restrict this facility to admin users.
5001 Otherwise, if -bem was used, read a message from stdin. */
5005 dns_init(FALSE, FALSE, FALSE);
5006 if (msg_action_arg > 0 && msg_action == MSG_LOAD)
5008 uschar spoolname[256]; /* Not big_buffer; used in spool_read_header() */
5010 exim_fail("exim: permission denied\n");
5011 message_id = argv[msg_action_arg];
5012 (void)string_format(spoolname, sizeof(spoolname), "%s-H", message_id);
5013 if ((deliver_datafile = spool_open_datafile(message_id)) < 0)
5014 printf ("Failed to load message datafile %s\n", message_id);
5015 if (spool_read_header(spoolname, TRUE, FALSE) != spool_read_OK)
5016 printf ("Failed to load message %s\n", message_id);
5019 /* Read a test message from a file. We fudge it up to be on stdin, saving
5020 stdin itself for later reading of expansion strings. */
5022 else if (expansion_test_message)
5024 int save_stdin = dup(0);
5025 int fd = Uopen(expansion_test_message, O_RDONLY, 0);
5027 exim_fail("exim: failed to open %s: %s\n", expansion_test_message,
5030 filter_test = FTEST_USER; /* Fudge to make it look like filter test */
5031 message_ended = END_NOTENDED;
5032 read_message_body(receive_msg(extract_recipients));
5033 message_linecount += body_linecount;
5034 (void)dup2(save_stdin, 0);
5035 (void)close(save_stdin);
5036 clearerr(stdin); /* Required by Darwin */
5039 /* Only admin users may see config-file macros this way */
5041 if (!f.admin_user) macros_user = macros = mlast = NULL;
5043 /* Allow $recipients for this testing */
5045 f.enable_dollar_recipients = TRUE;
5047 /* Expand command line items */
5049 if (recipients_arg < argc)
5050 while (recipients_arg < argc)
5051 expansion_test_line(argv[recipients_arg++]);
5057 char *(*fn_readline)(const char *) = NULL;
5058 void (*fn_addhist)(const char *) = NULL;
5062 void *dlhandle = set_readline(&fn_readline, &fn_addhist);
5065 while (s = get_stdinput(fn_readline, fn_addhist))
5066 expansion_test_line(s);
5069 if (dlhandle) dlclose(dlhandle);
5073 /* The data file will be open after -Mset */
5075 if (deliver_datafile >= 0)
5077 (void)close(deliver_datafile);
5078 deliver_datafile = -1;
5081 exim_exit(EXIT_SUCCESS);
5085 /* The active host name is normally the primary host name, but it can be varied
5086 for hosts that want to play several parts at once. We need to ensure that it is
5087 set for host checking, and for receiving messages. */
5089 smtp_active_hostname = primary_hostname;
5090 if (raw_active_hostname != NULL)
5092 uschar *nah = expand_string(raw_active_hostname);
5095 if (!f.expand_string_forcedfail)
5096 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to expand \"%s\" "
5097 "(smtp_active_hostname): %s", raw_active_hostname,
5098 expand_string_message);
5100 else if (nah[0] != 0) smtp_active_hostname = nah;
5103 /* Handle host checking: this facility mocks up an incoming SMTP call from a
5104 given IP address so that the blocking and relay configuration can be tested.
5105 Unless a sender_ident was set by -oMt, we discard it (the default is the
5106 caller's login name). An RFC 1413 call is made only if we are running in the
5107 test harness and an incoming interface and both ports are specified, because
5108 there is no TCP/IP call to find the ident for. */
5115 if (!sender_ident_set)
5117 sender_ident = NULL;
5118 if (f.running_in_test_harness && sender_host_port
5119 && interface_address && interface_port)
5120 verify_get_ident(1223); /* note hardwired port number */
5123 /* In case the given address is a non-canonical IPv6 address, canonicalize
5124 it. The code works for both IPv4 and IPv6, as it happens. */
5126 size = host_aton(sender_host_address, x);
5127 sender_host_address = store_get(48, FALSE); /* large enough for full IPv6 */
5128 (void)host_nmtoa(size, x, -1, sender_host_address, ':');
5130 /* Now set up for testing */
5132 host_build_sender_fullhost();
5136 f.sender_local = FALSE;
5137 f.sender_host_notsocket = TRUE;
5138 debug_file = stderr;
5139 debug_fd = fileno(debug_file);
5140 fprintf(stdout, "\n**** SMTP testing session as if from host %s\n"
5141 "**** but without any ident (RFC 1413) callback.\n"
5142 "**** This is not for real!\n\n",
5143 sender_host_address);
5145 memset(sender_host_cache, 0, sizeof(sender_host_cache));
5146 if (verify_check_host(&hosts_connection_nolog) == OK)
5147 BIT_CLEAR(log_selector, log_selector_size, Li_smtp_connection);
5148 log_write(L_smtp_connection, LOG_MAIN, "%s", smtp_get_connection_info());
5150 /* NOTE: We do *not* call smtp_log_no_mail() if smtp_start_session() fails,
5151 because a log line has already been written for all its failure exists
5152 (usually "connection refused: <reason>") and writing another one is
5153 unnecessary clutter. */
5155 if (smtp_start_session())
5158 for (; (reset_point = store_mark()); store_reset(reset_point))
5160 if (smtp_setup_msg() <= 0) break;
5161 if (!receive_msg(FALSE)) break;
5163 return_path = sender_address = NULL;
5164 dnslist_domain = dnslist_matched = NULL;
5165 #ifndef DISABLE_DKIM
5166 dkim_cur_signer = NULL;
5169 deliver_localpart_orig = NULL;
5170 deliver_domain_orig = NULL;
5171 callout_address = sending_ip_address = NULL;
5172 deliver_localpart_data = deliver_domain_data =
5173 recipient_data = sender_data = NULL;
5174 sender_rate = sender_rate_limit = sender_rate_period = NULL;
5178 exim_exit(EXIT_SUCCESS);
5182 /* Arrange for message reception if recipients or SMTP were specified;
5183 otherwise complain unless a version print (-bV) happened or this is a filter
5184 verification test or info dump.
5185 In the former case, show the configuration file name. */
5187 if (recipients_arg >= argc && !extract_recipients && !smtp_input)
5189 if (version_printed)
5191 if (Ustrchr(config_main_filelist, ':'))
5192 printf("Configuration file search path is %s\n", config_main_filelist);
5193 printf("Configuration file is %s\n", config_main_filename);
5194 return EXIT_SUCCESS;
5197 if (info_flag != CMDINFO_NONE)
5199 show_exim_information(info_flag, info_stdout ? stdout : stderr);
5200 return info_stdout ? EXIT_SUCCESS : EXIT_FAILURE;
5203 if (filter_test == FTEST_NONE)
5204 exim_usage(called_as);
5208 /* If mua_wrapper is set, Exim is being used to turn an MUA that submits on the
5209 standard input into an MUA that submits to a smarthost over TCP/IP. We know
5210 that we are not called from inetd, because that is rejected above. The
5211 following configuration settings are forced here:
5213 (1) Synchronous delivery (-odi)
5214 (2) Errors to stderr (-oep == -oeq)
5215 (3) No parallel remote delivery
5216 (4) Unprivileged delivery
5218 We don't force overall queueing options because there are several of them;
5219 instead, queueing is avoided below when mua_wrapper is set. However, we do need
5220 to override any SMTP queueing. */
5224 f.synchronous_delivery = TRUE;
5225 arg_error_handling = ERRORS_STDERR;
5226 remote_max_parallel = 1;
5227 deliver_drop_privilege = TRUE;
5228 f.queue_smtp = FALSE;
5229 queue_smtp_domains = NULL;
5231 message_utf8_downconvert = -1; /* convert-if-needed */
5236 /* Prepare to accept one or more new messages on the standard input. When a
5237 message has been read, its id is returned in message_id[]. If doing immediate
5238 delivery, we fork a delivery process for each received message, except for the
5239 last one, where we can save a process switch.
5241 It is only in non-smtp mode that error_handling is allowed to be changed from
5242 its default of ERRORS_SENDER by argument. (Idle thought: are any of the
5243 sendmail error modes other than -oem ever actually used? Later: yes.) */
5245 if (!smtp_input) error_handling = arg_error_handling;
5247 /* If this is an inetd call, ensure that stderr is closed to prevent panic
5248 logging being sent down the socket and make an identd call to get the
5251 else if (f.is_inetd)
5253 (void)fclose(stderr);
5254 exim_nullstd(); /* Re-open to /dev/null */
5255 verify_get_ident(IDENT_PORT);
5256 host_build_sender_fullhost();
5257 set_process_info("handling incoming connection from %s via inetd",
5261 /* If the sender host address has been set, build sender_fullhost if it hasn't
5262 already been done (which it will have been for inetd). This caters for the
5263 case when it is forced by -oMa. However, we must flag that it isn't a socket,
5264 so that the test for IP options is skipped for -bs input. */
5266 if (sender_host_address && !sender_fullhost)
5268 host_build_sender_fullhost();
5269 set_process_info("handling incoming connection from %s via -oMa",
5271 f.sender_host_notsocket = TRUE;
5274 /* Otherwise, set the sender host as unknown except for inetd calls. This
5275 prevents host checking in the case of -bs not from inetd and also for -bS. */
5277 else if (!f.is_inetd) f.sender_host_unknown = TRUE;
5279 /* If stdout does not exist, then dup stdin to stdout. This can happen
5280 if exim is started from inetd. In this case fd 0 will be set to the socket,
5281 but fd 1 will not be set. This also happens for passed SMTP channels. */
5283 if (fstat(1, &statbuf) < 0) (void)dup2(0, 1);
5285 /* Set up the incoming protocol name and the state of the program. Root is
5286 allowed to force received protocol via the -oMr option above. If we have come
5287 via inetd, the process info has already been set up. We don't set
5288 received_protocol here for smtp input, as it varies according to
5289 batch/HELO/EHLO/AUTH/TLS. */
5293 if (!f.is_inetd) set_process_info("accepting a local %sSMTP message from <%s>",
5294 smtp_batched_input? "batched " : "",
5295 (sender_address!= NULL)? sender_address : originator_login);
5299 int old_pool = store_pool;
5300 store_pool = POOL_PERM;
5301 if (!received_protocol)
5302 received_protocol = string_sprintf("local%s", called_as);
5303 store_pool = old_pool;
5304 set_process_info("accepting a local non-SMTP message from <%s>",
5308 /* Initialize the session_local_queue-only flag (this will be ignored if
5309 mua_wrapper is set) */
5312 session_local_queue_only = queue_only;
5314 /* For non-SMTP and for batched SMTP input, check that there is enough space on
5315 the spool if so configured. On failure, we must not attempt to send an error
5316 message! (For interactive SMTP, the check happens at MAIL FROM and an SMTP
5317 error code is given.) */
5319 if ((!smtp_input || smtp_batched_input) && !receive_check_fs(0))
5320 exim_fail("exim: insufficient disk space\n");
5322 /* If this is smtp input of any kind, real or batched, handle the start of the
5325 NOTE: We do *not* call smtp_log_no_mail() if smtp_start_session() fails,
5326 because a log line has already been written for all its failure exists
5327 (usually "connection refused: <reason>") and writing another one is
5328 unnecessary clutter. */
5334 memset(sender_host_cache, 0, sizeof(sender_host_cache));
5335 if (verify_check_host(&hosts_connection_nolog) == OK)
5336 BIT_CLEAR(log_selector, log_selector_size, Li_smtp_connection);
5337 log_write(L_smtp_connection, LOG_MAIN, "%s", smtp_get_connection_info());
5338 if (!smtp_start_session())
5341 exim_exit(EXIT_SUCCESS);
5345 /* Otherwise, set up the input size limit here. */
5349 thismessage_size_limit = expand_string_integer(message_size_limit, TRUE);
5350 if (expand_string_message)
5351 if (thismessage_size_limit == -1)
5352 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to expand "
5353 "message_size_limit: %s", expand_string_message);
5355 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "invalid value for "
5356 "message_size_limit: %s", expand_string_message);
5359 /* Loop for several messages when reading SMTP input. If we fork any child
5360 processes, we don't want to wait for them unless synchronous delivery is
5361 requested, so set SIGCHLD to SIG_IGN in that case. This is not necessarily the
5362 same as SIG_DFL, despite the fact that documentation often lists the default as
5363 "ignore". This is a confusing area. This is what I know:
5365 At least on some systems (e.g. Solaris), just setting SIG_IGN causes child
5366 processes that complete simply to go away without ever becoming defunct. You
5367 can't then wait for them - but we don't want to wait for them in the
5368 non-synchronous delivery case. However, this behaviour of SIG_IGN doesn't
5369 happen for all OS (e.g. *BSD is different).
5371 But that's not the end of the story. Some (many? all?) systems have the
5372 SA_NOCLDWAIT option for sigaction(). This requests the behaviour that Solaris
5373 has by default, so it seems that the difference is merely one of default
5374 (compare restarting vs non-restarting signals).
5376 To cover all cases, Exim sets SIG_IGN with SA_NOCLDWAIT here if it can. If not,
5377 it just sets SIG_IGN. To be on the safe side it also calls waitpid() at the end
5378 of the loop below. Paranoia rules.
5380 February 2003: That's *still* not the end of the story. There are now versions
5381 of Linux (where SIG_IGN does work) that are picky. If, having set SIG_IGN, a
5382 process then calls waitpid(), a grumble is written to the system log, because
5383 this is logically inconsistent. In other words, it doesn't like the paranoia.
5384 As a consequence of this, the waitpid() below is now excluded if we are sure
5385 that SIG_IGN works. */
5387 if (!f.synchronous_delivery)
5390 struct sigaction act;
5391 act.sa_handler = SIG_IGN;
5392 sigemptyset(&(act.sa_mask));
5393 act.sa_flags = SA_NOCLDWAIT;
5394 sigaction(SIGCHLD, &act, NULL);
5396 signal(SIGCHLD, SIG_IGN);
5400 /* Save the current store pool point, for resetting at the start of
5401 each message, and save the real sender address, if any. */
5403 real_sender_address = sender_address;
5405 /* Loop to receive messages; receive_msg() returns TRUE if there are more
5406 messages to be read (SMTP input), or FALSE otherwise (not SMTP, or SMTP channel
5411 rmark reset_point = store_mark();
5414 /* Handle the SMTP case; call smtp_setup_mst() to deal with the initial SMTP
5415 input and build the recipients list, before calling receive_msg() to read the
5416 message proper. Whatever sender address is given in the SMTP transaction is
5417 often ignored for local senders - we use the actual sender, which is normally
5418 either the underlying user running this process or a -f argument provided by
5419 a trusted caller. It is saved in real_sender_address. The test for whether to
5420 accept the SMTP sender is encapsulated in receive_check_set_sender(). */
5425 if ((rc = smtp_setup_msg()) > 0)
5427 if (real_sender_address != NULL &&
5428 !receive_check_set_sender(sender_address))
5430 sender_address = raw_sender = real_sender_address;
5431 sender_address_unrewritten = NULL;
5434 /* For batched SMTP, we have to run the acl_not_smtp_start ACL, since it
5435 isn't really SMTP, so no other ACL will run until the acl_not_smtp one at
5436 the very end. The result of the ACL is ignored (as for other non-SMTP
5437 messages). It is run for its potential side effects. */
5439 if (smtp_batched_input && acl_not_smtp_start != NULL)
5441 uschar *user_msg, *log_msg;
5442 f.enable_dollar_recipients = TRUE;
5443 (void)acl_check(ACL_WHERE_NOTSMTP_START, NULL, acl_not_smtp_start,
5444 &user_msg, &log_msg);
5445 f.enable_dollar_recipients = FALSE;
5448 /* Now get the data for the message */
5450 more = receive_msg(extract_recipients);
5451 if (message_id[0] == 0)
5453 cancel_cutthrough_connection(TRUE, US"receive dropped");
5454 if (more) goto moreloop;
5455 smtp_log_no_mail(); /* Log no mail if configured */
5456 exim_exit(EXIT_FAILURE);
5461 cancel_cutthrough_connection(TRUE, US"message setup dropped");
5462 smtp_log_no_mail(); /* Log no mail if configured */
5463 exim_exit(rc ? EXIT_FAILURE : EXIT_SUCCESS);
5467 /* In the non-SMTP case, we have all the information from the command
5468 line, but must process it in case it is in the more general RFC822
5469 format, and in any case, to detect syntax errors. Also, it appears that
5470 the use of comma-separated lists as single arguments is common, so we
5471 had better support them. */
5476 int count = argc - recipients_arg;
5477 uschar **list = argv + recipients_arg;
5479 /* These options cannot be changed dynamically for non-SMTP messages */
5481 f.active_local_sender_retain = local_sender_retain;
5482 f.active_local_from_check = local_from_check;
5484 /* Save before any rewriting */
5486 raw_sender = string_copy(sender_address);
5488 /* Loop for each argument (supplied by user hence tainted) */
5490 for (int i = 0; i < count; i++)
5492 int start, end, domain;
5494 uschar * s = string_copy_taint(list[i], TRUE);
5496 /* Loop for each comma-separated address */
5500 BOOL finished = FALSE;
5502 uschar *ss = parse_find_address_end(s, FALSE);
5504 if (*ss == ',') *ss = 0; else finished = TRUE;
5506 /* Check max recipients - if -t was used, these aren't recipients */
5508 if (recipients_max > 0 && ++rcount > recipients_max &&
5509 !extract_recipients)
5510 if (error_handling == ERRORS_STDERR)
5512 fprintf(stderr, "exim: too many recipients\n");
5513 exim_exit(EXIT_FAILURE);
5517 moan_to_sender(ERRMESS_TOOMANYRECIP, NULL, NULL, stdin, TRUE)?
5518 errors_sender_rc : EXIT_FAILURE;
5522 BOOL b = allow_utf8_domains;
5523 allow_utf8_domains = TRUE;
5526 parse_extract_address(s, &errmess, &start, &end, &domain, FALSE);
5529 if (string_is_utf8(recipient))
5530 message_smtputf8 = TRUE;
5532 allow_utf8_domains = b;
5535 if (domain == 0 && !f.allow_unqualified_recipient)
5538 errmess = US"unqualified recipient address not allowed";
5542 if (error_handling == ERRORS_STDERR)
5544 fprintf(stderr, "exim: bad recipient address \"%s\": %s\n",
5545 string_printing(list[i]), errmess);
5546 exim_exit(EXIT_FAILURE);
5552 eblock.text1 = string_printing(list[i]);
5553 eblock.text2 = errmess;
5555 moan_to_sender(ERRMESS_BADARGADDRESS, &eblock, NULL, stdin, TRUE)?
5556 errors_sender_rc : EXIT_FAILURE;
5559 receive_add_recipient(string_copy_taint(recipient, TRUE), -1);
5562 while (*(++s) != 0 && (*s == ',' || isspace(*s)));
5566 /* Show the recipients when debugging */
5570 if (sender_address) debug_printf("Sender: %s\n", sender_address);
5571 if (recipients_list)
5573 debug_printf("Recipients:\n");
5574 for (int i = 0; i < recipients_count; i++)
5575 debug_printf(" %s\n", recipients_list[i].address);
5579 /* Run the acl_not_smtp_start ACL if required. The result of the ACL is
5580 ignored; rejecting here would just add complication, and it can just as
5581 well be done later. Allow $recipients to be visible in the ACL. */
5583 if (acl_not_smtp_start)
5585 uschar *user_msg, *log_msg;
5586 f.enable_dollar_recipients = TRUE;
5587 (void)acl_check(ACL_WHERE_NOTSMTP_START, NULL, acl_not_smtp_start,
5588 &user_msg, &log_msg);
5589 f.enable_dollar_recipients = FALSE;
5592 /* Pause for a while waiting for input. If none received in that time,
5593 close the logfile, if we had one open; then if we wait for a long-running
5594 datasource (months, in one use-case) log rotation will not leave us holding
5597 if (!receive_timeout)
5599 struct timeval t = { .tv_sec = 30*60, .tv_usec = 0 }; /* 30 minutes */
5602 FD_ZERO(&r); FD_SET(0, &r);
5603 if (select(1, &r, NULL, NULL, &t) == 0) mainlog_close();
5606 /* Read the data for the message. If filter_test is not FTEST_NONE, this
5607 will just read the headers for the message, and not write anything onto the
5610 message_ended = END_NOTENDED;
5611 more = receive_msg(extract_recipients);
5613 /* more is always FALSE here (not SMTP message) when reading a message
5614 for real; when reading the headers of a message for filter testing,
5615 it is TRUE if the headers were terminated by '.' and FALSE otherwise. */
5617 if (message_id[0] == 0) exim_exit(EXIT_FAILURE);
5618 } /* Non-SMTP message reception */
5620 /* If this is a filter testing run, there are headers in store, but
5621 no message on the spool. Run the filtering code in testing mode, setting
5622 the domain to the qualify domain and the local part to the current user,
5623 unless they have been set by options. The prefix and suffix are left unset
5624 unless specified. The the return path is set to to the sender unless it has
5625 already been set from a return-path header in the message. */
5627 if (filter_test != FTEST_NONE)
5629 deliver_domain = ftest_domain ? ftest_domain : qualify_domain_recipient;
5630 deliver_domain_orig = deliver_domain;
5631 deliver_localpart = ftest_localpart ? ftest_localpart : originator_login;
5632 deliver_localpart_orig = deliver_localpart;
5633 deliver_localpart_prefix = ftest_prefix;
5634 deliver_localpart_suffix = ftest_suffix;
5635 deliver_home = originator_home;
5639 printf("Return-path copied from sender\n");
5640 return_path = string_copy(sender_address);
5643 printf("Return-path = %s\n", (return_path[0] == 0)? US"<>" : return_path);
5644 printf("Sender = %s\n", (sender_address[0] == 0)? US"<>" : sender_address);
5646 receive_add_recipient(
5647 string_sprintf("%s%s%s@%s",
5648 ftest_prefix ? ftest_prefix : US"",
5650 ftest_suffix ? ftest_suffix : US"",
5651 deliver_domain), -1);
5653 printf("Recipient = %s\n", recipients_list[0].address);
5654 if (ftest_prefix) printf("Prefix = %s\n", ftest_prefix);
5655 if (ftest_suffix) printf("Suffix = %s\n", ftest_suffix);
5657 if (chdir("/")) /* Get away from wherever the user is running this from */
5659 DEBUG(D_receive) debug_printf("chdir(\"/\") failed\n");
5660 exim_exit(EXIT_FAILURE);
5663 /* Now we run either a system filter test, or a user filter test, or both.
5664 In the latter case, headers added by the system filter will persist and be
5665 available to the user filter. We need to copy the filter variables
5668 if (filter_test & FTEST_SYSTEM)
5669 if (!filter_runtest(filter_sfd, filter_test_sfile, TRUE, more))
5670 exim_exit(EXIT_FAILURE);
5672 memcpy(filter_sn, filter_n, sizeof(filter_sn));
5674 if (filter_test & FTEST_USER)
5675 if (!filter_runtest(filter_ufd, filter_test_ufile, FALSE, more))
5676 exim_exit(EXIT_FAILURE);
5678 exim_exit(EXIT_SUCCESS);
5681 /* Else act on the result of message reception. We should not get here unless
5682 message_id[0] is non-zero. If queue_only is set, session_local_queue_only
5683 will be TRUE. If it is not, check on the number of messages received in this
5686 if ( !session_local_queue_only
5687 && smtp_accept_queue_per_connection > 0
5688 && receive_messagecount > smtp_accept_queue_per_connection)
5690 session_local_queue_only = TRUE;
5691 queue_only_reason = 2;
5694 /* Initialize local_queue_only from session_local_queue_only. If it is false,
5695 and queue_only_load is set, check that the load average is below it. If it is
5696 not, set local_queue_only TRUE. If queue_only_load_latch is true (the
5697 default), we put the whole session into queue_only mode. It then remains this
5698 way for any subsequent messages on the same SMTP connection. This is a
5699 deliberate choice; even though the load average may fall, it doesn't seem
5700 right to deliver later messages on the same call when not delivering earlier
5701 ones. However, there are odd cases where this is not wanted, so this can be
5702 changed by setting queue_only_load_latch false. */
5704 if (!(local_queue_only = session_local_queue_only) && queue_only_load >= 0)
5705 if ((local_queue_only = (load_average = OS_GETLOADAVG()) > queue_only_load))
5707 queue_only_reason = 3;
5708 if (queue_only_load_latch) session_local_queue_only = TRUE;
5711 /* If running as an MUA wrapper, all queueing options and freezing options
5715 local_queue_only = f.queue_only_policy = f.deliver_freeze = FALSE;
5717 /* Log the queueing here, when it will get a message id attached, but
5718 not if queue_only is set (case 0). Case 1 doesn't happen here (too many
5721 if (local_queue_only)
5723 cancel_cutthrough_connection(TRUE, US"no delivery; queueing");
5724 switch(queue_only_reason)
5727 log_write(L_delay_delivery,
5728 LOG_MAIN, "no immediate delivery: more than %d messages "
5729 "received in one connection", smtp_accept_queue_per_connection);
5733 log_write(L_delay_delivery,
5734 LOG_MAIN, "no immediate delivery: load average %.2f",
5735 (double)load_average/1000.0);
5740 else if (f.queue_only_policy || f.deliver_freeze)
5741 cancel_cutthrough_connection(TRUE, US"no delivery; queueing");
5743 /* Else do the delivery unless the ACL or local_scan() called for queue only
5744 or froze the message. Always deliver in a separate process. A fork failure is
5745 not a disaster, as the delivery will eventually happen on a subsequent queue
5746 run. The search cache must be tidied before the fork, as the parent will
5747 do it before exiting. The child will trigger a lookup failure and
5748 thereby defer the delivery if it tries to use (for example) a cached ldap
5749 connection that the parent has called unbind on. */
5756 if ((pid = exim_fork(US"local-accept-delivery")) == 0)
5759 close_unwanted(); /* Close unwanted file descriptors and TLS */
5760 exim_nullstd(); /* Ensure std{in,out,err} exist */
5762 /* Re-exec Exim if we need to regain privilege (note: in mua_wrapper
5763 mode, deliver_drop_privilege is forced TRUE). */
5765 if (geteuid() != root_uid && !deliver_drop_privilege && !unprivileged)
5767 delivery_re_exec(CEE_EXEC_EXIT);
5768 /* Control does not return here. */
5771 /* No need to re-exec */
5773 rc = deliver_message(message_id, FALSE, FALSE);
5775 exim_underbar_exit(!mua_wrapper || rc == DELIVER_MUA_SUCCEEDED
5776 ? EXIT_SUCCESS : EXIT_FAILURE);
5781 cancel_cutthrough_connection(TRUE, US"delivery fork failed");
5782 log_write(0, LOG_MAIN|LOG_PANIC, "failed to fork automatic delivery "
5783 "process: %s", strerror(errno));
5787 release_cutthrough_connection(US"msg passed for delivery");
5789 /* In the parent, wait if synchronous delivery is required. This will
5790 always be the case in MUA wrapper mode. */
5792 if (f.synchronous_delivery)
5795 while (wait(&status) != pid);
5796 if ((status & 0x00ff) != 0)
5797 log_write(0, LOG_MAIN|LOG_PANIC,
5798 "process %d crashed with signal %d while delivering %s",
5799 (int)pid, status & 0x00ff, message_id);
5800 if (mua_wrapper && (status & 0xffff) != 0) exim_exit(EXIT_FAILURE);
5805 /* The loop will repeat if more is TRUE. If we do not know know that the OS
5806 automatically reaps children (see comments above the loop), clear away any
5807 finished subprocesses here, in case there are lots of messages coming in
5808 from the same source. */
5810 #ifndef SIG_IGN_WORKS
5811 while (waitpid(-1, NULL, WNOHANG) > 0);
5815 return_path = sender_address = NULL;
5816 authenticated_sender = NULL;
5817 deliver_localpart_orig = NULL;
5818 deliver_domain_orig = NULL;
5819 deliver_host = deliver_host_address = NULL;
5820 dnslist_domain = dnslist_matched = NULL;
5821 #ifdef WITH_CONTENT_SCAN
5822 malware_name = NULL;
5824 callout_address = NULL;
5825 sending_ip_address = NULL;
5826 deliver_localpart_data = deliver_domain_data =
5827 recipient_data = sender_data = NULL;
5829 for(int i = 0; i < REGEX_VARS; i++) regex_vars[i] = NULL;
5831 store_reset(reset_point);
5834 exim_exit(EXIT_SUCCESS); /* Never returns */
5835 return 0; /* To stop compiler warning */