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 itemlen, maxlen, description);
775 /* only pass through the string item back to the caller if it's short enough */
776 static inline 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(const uschar * line)
1563 Ustrncpy(big_buffer, line, big_buffer_size);
1564 big_buffer[big_buffer_size-1] = '\0';
1565 len = Ustrlen(big_buffer);
1567 (void) macros_expand(0, &len, &dummy_macexp);
1569 if (isupper(big_buffer[0]))
1571 if (macro_read_assignment(big_buffer))
1572 printf("Defined macro '%s'\n", mlast->name);
1575 if ((s = expand_string(big_buffer))) printf("%s\n", CS s);
1576 else printf("Failed: %s\n", expand_string_message);
1581 /*************************************************
1582 * Entry point and high-level code *
1583 *************************************************/
1585 /* Entry point for the Exim mailer. Analyse the arguments and arrange to take
1586 the appropriate action. All the necessary functions are present in the one
1587 binary. I originally thought one should split it up, but it turns out that so
1588 much of the apparatus is needed in each chunk that one might as well just have
1589 it all available all the time, which then makes the coding easier as well.
1592 argc count of entries in argv
1593 argv argument strings, with argv[0] being the program name
1595 Returns: EXIT_SUCCESS if terminated successfully
1596 EXIT_FAILURE otherwise, except when a message has been sent
1597 to the sender, and -oee was given
1601 main(int argc, char **cargv)
1603 uschar **argv = USS cargv;
1604 int arg_receive_timeout = -1;
1605 int arg_smtp_receive_timeout = -1;
1606 int arg_error_handling = error_handling;
1607 int filter_sfd = -1;
1608 int filter_ufd = -1;
1611 int list_queue_option = 0;
1613 int msg_action_arg = -1;
1614 int namelen = (argv[0] == NULL)? 0 : Ustrlen(argv[0]);
1615 int queue_only_reason = 0;
1617 int perl_start_option = 0;
1619 int recipients_arg = argc;
1620 int sender_address_domain = 0;
1621 int test_retry_arg = -1;
1622 int test_rewrite_arg = -1;
1623 gid_t original_egid;
1624 BOOL arg_queue_only = FALSE;
1625 BOOL bi_option = FALSE;
1626 BOOL checking = FALSE;
1627 BOOL count_queue = FALSE;
1628 BOOL expansion_test = FALSE;
1629 BOOL extract_recipients = FALSE;
1630 BOOL flag_G = FALSE;
1631 BOOL flag_n = FALSE;
1632 BOOL forced_delivery = FALSE;
1633 BOOL f_end_dot = FALSE;
1634 BOOL deliver_give_up = FALSE;
1635 BOOL list_queue = FALSE;
1636 BOOL list_options = FALSE;
1637 BOOL list_config = FALSE;
1638 BOOL local_queue_only;
1640 BOOL one_msg_action = FALSE;
1641 BOOL opt_D_used = FALSE;
1642 BOOL queue_only_set = FALSE;
1643 BOOL receiving_message = TRUE;
1644 BOOL sender_ident_set = FALSE;
1645 BOOL session_local_queue_only;
1647 BOOL removed_privilege = FALSE;
1648 BOOL usage_wanted = FALSE;
1649 BOOL verify_address_mode = FALSE;
1650 BOOL verify_as_sender = FALSE;
1651 BOOL version_printed = FALSE;
1652 uschar *alias_arg = NULL;
1653 uschar *called_as = US"";
1654 uschar *cmdline_syslog_name = NULL;
1655 uschar *start_queue_run_id = NULL;
1656 uschar *stop_queue_run_id = NULL;
1657 uschar *expansion_test_message = NULL;
1658 const uschar *ftest_domain = NULL;
1659 const uschar *ftest_localpart = NULL;
1660 const uschar *ftest_prefix = NULL;
1661 const uschar *ftest_suffix = NULL;
1662 uschar *log_oneline = NULL;
1663 uschar *malware_test_file = NULL;
1664 uschar *real_sender_address;
1665 uschar *originator_home = US"/";
1669 struct stat statbuf;
1670 pid_t passed_qr_pid = (pid_t)0;
1671 int passed_qr_pipe = -1;
1672 gid_t group_list[EXIM_GROUPLIST_SIZE];
1674 /* For the -bI: flag */
1675 enum commandline_info info_flag = CMDINFO_NONE;
1676 BOOL info_stdout = FALSE;
1678 /* Possible options for -R and -S */
1680 static uschar *rsopts[] = { US"f", US"ff", US"r", US"rf", US"rff" };
1682 /* Need to define this in case we need to change the environment in order
1683 to get rid of a bogus time zone. We have to make it char rather than uschar
1684 because some OS define it in /usr/include/unistd.h. */
1686 extern char **environ;
1688 #ifdef MEASURE_TIMING
1689 (void)gettimeofday(×tamp_startup, NULL);
1692 /* If the Exim user and/or group and/or the configuration file owner/group were
1693 defined by ref:name at build time, we must now find the actual uid/gid values.
1694 This is a feature to make the lives of binary distributors easier. */
1696 #ifdef EXIM_USERNAME
1697 if (route_finduser(US EXIM_USERNAME, &pw, &exim_uid))
1700 exim_fail("exim: refusing to run with uid 0 for \"%s\"\n", EXIM_USERNAME);
1702 /* If ref:name uses a number as the name, route_finduser() returns
1703 TRUE with exim_uid set and pw coerced to NULL. */
1705 exim_gid = pw->pw_gid;
1706 #ifndef EXIM_GROUPNAME
1709 "exim: ref:name should specify a usercode, not a group.\n"
1710 "exim: can't let you get away with it unless you also specify a group.\n");
1714 exim_fail("exim: failed to find uid for user name \"%s\"\n", EXIM_USERNAME);
1717 #ifdef EXIM_GROUPNAME
1718 if (!route_findgroup(US EXIM_GROUPNAME, &exim_gid))
1719 exim_fail("exim: failed to find gid for group name \"%s\"\n", EXIM_GROUPNAME);
1722 #ifdef CONFIGURE_OWNERNAME
1723 if (!route_finduser(US CONFIGURE_OWNERNAME, NULL, &config_uid))
1724 exim_fail("exim: failed to find uid for user name \"%s\"\n",
1725 CONFIGURE_OWNERNAME);
1728 /* We default the system_filter_user to be the Exim run-time user, as a
1729 sane non-root value. */
1730 system_filter_uid = exim_uid;
1732 #ifdef CONFIGURE_GROUPNAME
1733 if (!route_findgroup(US CONFIGURE_GROUPNAME, &config_gid))
1734 exim_fail("exim: failed to find gid for group name \"%s\"\n",
1735 CONFIGURE_GROUPNAME);
1738 /* In the Cygwin environment, some initialization used to need doing.
1739 It was fudged in by means of this macro; now no longer but we'll leave
1740 it in case of others. */
1746 /* Check a field which is patched when we are running Exim within its
1747 testing harness; do a fast initial check, and then the whole thing. */
1749 f.running_in_test_harness =
1750 *running_status == '<' && Ustrcmp(running_status, "<<<testing>>>") == 0;
1751 if (f.running_in_test_harness)
1754 /* Protect against abusive argv[0] */
1755 exim_str_fail_toolong(argv[0], PATH_MAX, "argv[0]");
1757 /* The C standard says that the equivalent of setlocale(LC_ALL, "C") is obeyed
1758 at the start of a program; however, it seems that some environments do not
1759 follow this. A "strange" locale can affect the formatting of timestamps, so we
1762 setlocale(LC_ALL, "C");
1764 /* Get the offset between CLOCK_MONOTONIC/CLOCK_BOOTTIME and wallclock */
1766 #ifdef _POSIX_MONOTONIC_CLOCK
1770 /* Set up the default handler for timing using alarm(). */
1772 os_non_restarting_signal(SIGALRM, sigalrm_handler);
1774 /* Ensure we have a buffer for constructing log entries. Use malloc directly,
1775 because store_malloc writes a log entry on failure. */
1777 if (!(log_buffer = US malloc(LOG_BUFFER_SIZE)))
1778 exim_fail("exim: failed to get store for log buffer\n");
1780 /* Initialize the default log options. */
1782 bits_set(log_selector, log_selector_size, log_default);
1784 /* Set log_stderr to stderr, provided that stderr exists. This gets reset to
1785 NULL when the daemon is run and the file is closed. We have to use this
1786 indirection, because some systems don't allow writing to the variable "stderr".
1789 if (fstat(fileno(stderr), &statbuf) >= 0) log_stderr = stderr;
1791 /* Arrange for the PCRE regex library to use our store functions. Note that
1792 the normal calls are actually macros that add additional arguments for
1793 debugging purposes so we have to assign specially constructed functions here.
1794 The default is to use store in the stacking pool, but this is overridden in the
1795 regex_must_compile() function. */
1797 pcre_malloc = function_store_get;
1798 pcre_free = function_dummy_free;
1800 /* Ensure there is a big buffer for temporary use in several places. It is put
1801 in malloc store so that it can be freed for enlargement if necessary. */
1803 big_buffer = store_malloc(big_buffer_size);
1805 /* Set up the handler for the data request signal, and set the initial
1806 descriptive text. */
1808 process_info = store_get(PROCESS_INFO_SIZE, TRUE); /* tainted */
1809 set_process_info("initializing");
1810 os_restarting_signal(SIGUSR1, usr1_handler);
1812 /* If running in a dockerized environment, the TERM signal is only
1813 delegated to the PID 1 if we request it by setting an signal handler */
1814 if (getpid() == 1) signal(SIGTERM, term_handler);
1816 /* SIGHUP is used to get the daemon to reconfigure. It gets set as appropriate
1817 in the daemon code. For the rest of Exim's uses, we ignore it. */
1819 signal(SIGHUP, SIG_IGN);
1821 /* We don't want to die on pipe errors as the code is written to handle
1822 the write error instead. */
1824 signal(SIGPIPE, SIG_IGN);
1826 /* Under some circumstance on some OS, Exim can get called with SIGCHLD
1827 set to SIG_IGN. This causes subprocesses that complete before the parent
1828 process waits for them not to hang around, so when Exim calls wait(), nothing
1829 is there. The wait() code has been made robust against this, but let's ensure
1830 that SIGCHLD is set to SIG_DFL, because it's tidier to wait and get a process
1831 ending status. We use sigaction rather than plain signal() on those OS where
1832 SA_NOCLDWAIT exists, because we want to be sure it is turned off. (There was a
1833 problem on AIX with this.) */
1837 struct sigaction act;
1838 act.sa_handler = SIG_DFL;
1839 sigemptyset(&(act.sa_mask));
1841 sigaction(SIGCHLD, &act, NULL);
1844 signal(SIGCHLD, SIG_DFL);
1847 /* Save the arguments for use if we re-exec exim as a daemon after receiving
1852 /* Set up the version number. Set up the leading 'E' for the external form of
1853 message ids, set the pointer to the internal form, and initialize it to
1854 indicate no message being processed. */
1857 message_id_option[0] = '-';
1858 message_id_external = message_id_option + 1;
1859 message_id_external[0] = 'E';
1860 message_id = message_id_external + 1;
1863 /* Set the umask to zero so that any files Exim creates using open() are
1864 created with the modes that it specifies. NOTE: Files created with fopen() have
1865 a problem, which was not recognized till rather late (February 2006). With this
1866 umask, such files will be world writeable. (They are all content scanning files
1867 in the spool directory, which isn't world-accessible, so this is not a
1868 disaster, but it's untidy.) I don't want to change this overall setting,
1869 however, because it will interact badly with the open() calls. Instead, there's
1870 now a function called modefopen() that fiddles with the umask while calling
1875 /* Precompile the regular expression for matching a message id. Keep this in
1876 step with the code that generates ids in the accept.c module. We need to do
1877 this here, because the -M options check their arguments for syntactic validity
1878 using mac_ismsgid, which uses this. */
1881 regex_must_compile(US"^(?:[^\\W_]{6}-){2}[^\\W_]{2}$", FALSE, TRUE);
1883 /* Precompile the regular expression that is used for matching an SMTP error
1884 code, possibly extended, at the start of an error message. Note that the
1885 terminating whitespace character is included. */
1888 regex_must_compile(US"^\\d\\d\\d\\s(?:\\d\\.\\d\\d?\\d?\\.\\d\\d?\\d?\\s)?",
1891 #ifdef WHITELIST_D_MACROS
1892 /* Precompile the regular expression used to filter the content of macros
1893 given to -D for permissibility. */
1895 regex_whitelisted_macro =
1896 regex_must_compile(US"^[A-Za-z0-9_/.-]*$", FALSE, TRUE);
1899 for (i = 0; i < REGEX_VARS; i++) regex_vars[i] = NULL;
1901 /* If the program is called as "mailq" treat it as equivalent to "exim -bp";
1902 this seems to be a generally accepted convention, since one finds symbolic
1903 links called "mailq" in standard OS configurations. */
1905 if ((namelen == 5 && Ustrcmp(argv[0], "mailq") == 0) ||
1906 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/mailq", 6) == 0))
1909 receiving_message = FALSE;
1910 called_as = US"-mailq";
1913 /* If the program is called as "rmail" treat it as equivalent to
1914 "exim -i -oee", thus allowing UUCP messages to be input using non-SMTP mode,
1915 i.e. preventing a single dot on a line from terminating the message, and
1916 returning with zero return code, even in cases of error (provided an error
1917 message has been sent). */
1919 if ((namelen == 5 && Ustrcmp(argv[0], "rmail") == 0) ||
1920 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/rmail", 6) == 0))
1923 called_as = US"-rmail";
1924 errors_sender_rc = EXIT_SUCCESS;
1927 /* If the program is called as "rsmtp" treat it as equivalent to "exim -bS";
1928 this is a smail convention. */
1930 if ((namelen == 5 && Ustrcmp(argv[0], "rsmtp") == 0) ||
1931 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/rsmtp", 6) == 0))
1933 smtp_input = smtp_batched_input = TRUE;
1934 called_as = US"-rsmtp";
1937 /* If the program is called as "runq" treat it as equivalent to "exim -q";
1938 this is a smail convention. */
1940 if ((namelen == 4 && Ustrcmp(argv[0], "runq") == 0) ||
1941 (namelen > 4 && Ustrncmp(argv[0] + namelen - 5, "/runq", 5) == 0))
1944 receiving_message = FALSE;
1945 called_as = US"-runq";
1948 /* If the program is called as "newaliases" treat it as equivalent to
1949 "exim -bi"; this is a sendmail convention. */
1951 if ((namelen == 10 && Ustrcmp(argv[0], "newaliases") == 0) ||
1952 (namelen > 10 && Ustrncmp(argv[0] + namelen - 11, "/newaliases", 11) == 0))
1955 receiving_message = FALSE;
1956 called_as = US"-newaliases";
1959 /* Save the original effective uid for a couple of uses later. It should
1960 normally be root, but in some esoteric environments it may not be. */
1962 original_euid = geteuid();
1963 original_egid = getegid();
1965 /* Get the real uid and gid. If the caller is root, force the effective uid/gid
1966 to be the same as the real ones. This makes a difference only if Exim is setuid
1967 (or setgid) to something other than root, which could be the case in some
1968 special configurations. */
1970 real_uid = getuid();
1971 real_gid = getgid();
1973 if (real_uid == root_uid)
1975 if ((rv = setgid(real_gid)))
1976 exim_fail("exim: setgid(%ld) failed: %s\n",
1977 (long int)real_gid, strerror(errno));
1978 if ((rv = setuid(real_uid)))
1979 exim_fail("exim: setuid(%ld) failed: %s\n",
1980 (long int)real_uid, strerror(errno));
1983 /* If neither the original real uid nor the original euid was root, Exim is
1984 running in an unprivileged state. */
1986 unprivileged = (real_uid != root_uid && original_euid != root_uid);
1988 /* For most of the args-parsing we need to use permanent pool memory */
1990 int old_pool = store_pool;
1991 store_pool = POOL_PERM;
1993 /* Scan the program's arguments. Some can be dealt with right away; others are
1994 simply recorded for checking and handling afterwards. Do a high-level switch
1995 on the second character (the one after '-'), to save some effort. */
1997 for (i = 1; i < argc; i++)
1999 BOOL badarg = FALSE;
2000 uschar * arg = argv[i];
2004 /* An argument not starting with '-' is the start of a recipients list;
2005 break out of the options-scanning loop. */
2013 /* An option consisting of -- terminates the options */
2015 if (Ustrcmp(arg, "--") == 0)
2017 recipients_arg = i + 1;
2021 /* Handle flagged options */
2023 switchchar = arg[1];
2026 /* Make all -ex options synonymous with -oex arguments, since that
2027 is assumed by various callers. Also make -qR options synonymous with -R
2028 options, as that seems to be required as well. Allow for -qqR too, and
2029 the same for -S options. */
2031 if (Ustrncmp(arg+1, "oe", 2) == 0 ||
2032 Ustrncmp(arg+1, "qR", 2) == 0 ||
2033 Ustrncmp(arg+1, "qS", 2) == 0)
2035 switchchar = arg[2];
2038 else if (Ustrncmp(arg+1, "qqR", 3) == 0 || Ustrncmp(arg+1, "qqS", 3) == 0)
2040 switchchar = arg[3];
2042 f.queue_2stage = TRUE;
2045 /* Make -r synonymous with -f, since it is a documented alias */
2047 else if (arg[1] == 'r') switchchar = 'f';
2049 /* Make -ov synonymous with -v */
2051 else if (Ustrcmp(arg, "-ov") == 0)
2057 /* deal with --option_aliases */
2058 else if (switchchar == '-')
2060 if (Ustrcmp(argrest, "help") == 0)
2062 usage_wanted = TRUE;
2065 else if (Ustrcmp(argrest, "version") == 0)
2072 /* High-level switch on active initial letter */
2077 /* sendmail uses -Ac and -Am to control which .cf file is used;
2080 if (!*argrest) { badarg = TRUE; break; }
2083 BOOL ignore = FALSE;
2088 if (*(argrest + 1) == '\0')
2092 if (!ignore) badarg = TRUE;
2096 /* -Btype is a sendmail option for 7bit/8bit setting. Exim is 8-bit clean
2097 so has no need of it. */
2100 if (!*argrest) i++; /* Skip over the type */
2106 receiving_message = FALSE; /* Reset TRUE for -bm, -bS, -bs below */
2110 /* -bd: Run in daemon mode, awaiting SMTP connections.
2111 -bdf: Ditto, but in the foreground.
2114 f.daemon_listen = TRUE;
2115 if (*argrest == 'f') f.background_daemon = FALSE;
2116 else if (*argrest) badarg = TRUE;
2119 /* -be: Run in expansion test mode
2120 -bem: Ditto, but read a message from a file first
2123 expansion_test = checking = TRUE;
2124 if (*argrest == 'm')
2126 if (++i >= argc) { badarg = TRUE; break; }
2127 expansion_test_message = argv[i];
2130 if (*argrest) badarg = TRUE;
2133 /* -bF: Run system filter test */
2135 filter_test |= checking = FTEST_SYSTEM;
2136 if (*argrest) badarg = TRUE;
2137 else if (++i < argc) filter_test_sfile = argv[i];
2138 else exim_fail("exim: file name expected after %s\n", argv[i-1]);
2141 /* -bf: Run user filter test
2142 -bfd: Set domain for filter testing
2143 -bfl: Set local part for filter testing
2144 -bfp: Set prefix for filter testing
2145 -bfs: Set suffix for filter testing
2150 filter_test |= checking = FTEST_USER;
2151 if (++i < argc) filter_test_ufile = argv[i];
2152 else exim_fail("exim: file name expected after %s\n", argv[i-1]);
2157 exim_fail("exim: string expected after %s\n", arg);
2158 if (Ustrcmp(argrest, "d") == 0) ftest_domain = exim_str_fail_toolong(argv[i], EXIM_DOMAINNAME_MAX, "-bfd");
2159 else if (Ustrcmp(argrest, "l") == 0) ftest_localpart = exim_str_fail_toolong(argv[i], EXIM_LOCALPART_MAX, "-bfl");
2160 else if (Ustrcmp(argrest, "p") == 0) ftest_prefix = exim_str_fail_toolong(argv[i], EXIM_LOCALPART_MAX, "-bfp");
2161 else if (Ustrcmp(argrest, "s") == 0) ftest_suffix = exim_str_fail_toolong(argv[i], EXIM_LOCALPART_MAX, "-bfs");
2166 /* -bh: Host checking - an IP address must follow. */
2168 if (!*argrest || Ustrcmp(argrest, "c") == 0)
2170 if (++i >= argc) { badarg = TRUE; break; }
2171 sender_host_address = string_copy_taint(exim_str_fail_toolong(argv[i], EXIM_IPADDR_MAX, "-bh"), TRUE);
2172 host_checking = checking = f.log_testing_mode = TRUE;
2173 f.host_checking_callout = *argrest == 'c';
2174 message_logs = FALSE;
2179 /* -bi: This option is used by sendmail to initialize *the* alias file,
2180 though it has the -oA option to specify a different file. Exim has no
2181 concept of *the* alias file, but since Sun's YP make script calls
2182 sendmail this way, some support must be provided. */
2184 if (!*argrest) bi_option = TRUE;
2188 /* -bI: provide information, of the type to follow after a colon.
2189 This is an Exim flag. */
2191 if (Ustrlen(argrest) >= 1 && *argrest == ':')
2193 uschar *p = argrest+1;
2194 info_flag = CMDINFO_HELP;
2196 if (strcmpic(p, CUS"sieve") == 0)
2198 info_flag = CMDINFO_SIEVE;
2201 else if (strcmpic(p, CUS"dscp") == 0)
2203 info_flag = CMDINFO_DSCP;
2206 else if (strcmpic(p, CUS"help") == 0)
2212 /* -bm: Accept and deliver message - the default option. Reinstate
2213 receiving_message, which got turned off for all -b options.
2214 -bmalware: test the filename given for malware */
2216 if (!*argrest) receiving_message = TRUE;
2217 else if (Ustrcmp(argrest, "alware") == 0)
2219 if (++i >= argc) { badarg = TRUE; break; }
2221 malware_test_file = argv[i];
2226 /* -bnq: For locally originating messages, do not qualify unqualified
2227 addresses. In the envelope, this causes errors; in header lines they
2230 if (Ustrcmp(argrest, "q") == 0)
2232 f.allow_unqualified_sender = FALSE;
2233 f.allow_unqualified_recipient = FALSE;
2238 /* -bpxx: List the contents of the mail queue, in various forms. If
2239 the option is -bpc, just a queue count is needed. Otherwise, if the
2240 first letter after p is r, then order is random. */
2242 if (*argrest == 'c')
2245 if (*++argrest) badarg = TRUE;
2249 if (*argrest == 'r')
2251 list_queue_option = 8;
2254 else list_queue_option = 0;
2258 /* -bp: List the contents of the mail queue, top-level only */
2262 /* -bpu: List the contents of the mail queue, top-level undelivered */
2264 else if (Ustrcmp(argrest, "u") == 0) list_queue_option += 1;
2266 /* -bpa: List the contents of the mail queue, including all delivered */
2268 else if (Ustrcmp(argrest, "a") == 0) list_queue_option += 2;
2270 /* Unknown after -bp[r] */
2276 /* -bP: List the configuration variables given as the address list.
2277 Force -v, so configuration errors get displayed. */
2280 /* -bP config: we need to setup here, because later,
2281 * when list_options is checked, the config is read already */
2284 else if (argv[i+1] && Ustrcmp(argv[i+1], "config") == 0)
2287 readconf_save_config(version_string);
2291 list_options = TRUE;
2292 debug_selector |= D_v;
2293 debug_file = stderr;
2297 /* -brt: Test retry configuration lookup */
2299 if (Ustrcmp(argrest, "t") == 0)
2302 test_retry_arg = i + 1;
2306 /* -brw: Test rewrite configuration */
2308 else if (Ustrcmp(argrest, "w") == 0)
2311 test_rewrite_arg = i + 1;
2317 /* -bS: Read SMTP commands on standard input, but produce no replies -
2318 all errors are reported by sending messages. */
2321 smtp_input = smtp_batched_input = receiving_message = TRUE;
2325 /* -bs: Read SMTP commands on standard input and produce SMTP replies
2326 on standard output. */
2328 if (!*argrest) smtp_input = receiving_message = TRUE;
2332 /* -bt: address testing mode */
2335 f.address_test_mode = checking = f.log_testing_mode = TRUE;
2339 /* -bv: verify addresses */
2342 verify_address_mode = checking = f.log_testing_mode = TRUE;
2344 /* -bvs: verify sender addresses */
2346 else if (Ustrcmp(argrest, "s") == 0)
2348 verify_address_mode = checking = f.log_testing_mode = TRUE;
2349 verify_as_sender = TRUE;
2354 /* -bV: Print version string and support details */
2358 printf("Exim version %s #%s built %s\n", version_string,
2359 version_cnumber, version_date);
2360 printf("%s\n", CS version_copyright);
2361 version_printed = TRUE;
2362 show_whats_supported(stdout);
2363 f.log_testing_mode = TRUE;
2368 /* -bw: inetd wait mode, accept a listening socket as stdin */
2370 f.inetd_wait_mode = TRUE;
2371 f.background_daemon = FALSE;
2372 f.daemon_listen = TRUE;
2374 if ((inetd_wait_timeout = readconf_readtime(argrest, 0, FALSE)) <= 0)
2375 exim_fail("exim: bad time value %s: abandoned\n", argv[i]);
2386 /* -C: change configuration file list; ignore if it isn't really
2387 a change! Enforce a prefix check if required. */
2391 if (++i < argc) argrest = argv[i]; else { badarg = TRUE; break; }
2392 if (Ustrcmp(config_main_filelist, argrest) != 0)
2394 #ifdef ALT_CONFIG_PREFIX
2396 int len = Ustrlen(ALT_CONFIG_PREFIX);
2397 const uschar *list = argrest;
2399 while((filename = string_nextinlist(&list, &sep, big_buffer,
2401 if ( ( Ustrlen(filename) < len
2402 || Ustrncmp(filename, ALT_CONFIG_PREFIX, len) != 0
2403 || Ustrstr(filename, "/../") != NULL
2405 && (Ustrcmp(filename, "/dev/null") != 0 || real_uid != root_uid)
2407 exim_fail("-C Permission denied\n");
2409 if (real_uid != root_uid)
2411 #ifdef TRUSTED_CONFIG_LIST
2413 if (real_uid != exim_uid
2414 #ifdef CONFIGURE_OWNER
2415 && real_uid != config_uid
2418 f.trusted_config = FALSE;
2421 FILE *trust_list = Ufopen(TRUSTED_CONFIG_LIST, "rb");
2424 struct stat statbuf;
2426 if (fstat(fileno(trust_list), &statbuf) != 0 ||
2427 (statbuf.st_uid != root_uid /* owner not root */
2428 #ifdef CONFIGURE_OWNER
2429 && statbuf.st_uid != config_uid /* owner not the special one */
2432 (statbuf.st_gid != root_gid /* group not root */
2433 #ifdef CONFIGURE_GROUP
2434 && statbuf.st_gid != config_gid /* group not the special one */
2436 && (statbuf.st_mode & 020) != 0 /* group writeable */
2438 (statbuf.st_mode & 2) != 0) /* world writeable */
2440 f.trusted_config = FALSE;
2445 /* Well, the trust list at least is up to scratch... */
2447 uschar *trusted_configs[32];
2450 int old_pool = store_pool;
2451 store_pool = POOL_MAIN;
2453 reset_point = store_mark();
2454 while (Ufgets(big_buffer, big_buffer_size, trust_list))
2456 uschar *start = big_buffer, *nl;
2457 while (*start && isspace(*start))
2461 nl = Ustrchr(start, '\n');
2464 trusted_configs[nr_configs++] = string_copy(start);
2465 if (nr_configs == nelem(trusted_configs))
2473 const uschar *list = argrest;
2475 while (f.trusted_config && (filename = string_nextinlist(&list,
2476 &sep, big_buffer, big_buffer_size)))
2478 for (i=0; i < nr_configs; i++)
2479 if (Ustrcmp(filename, trusted_configs[i]) == 0)
2481 if (i == nr_configs)
2483 f.trusted_config = FALSE;
2488 else /* No valid prefixes found in trust_list file. */
2489 f.trusted_config = FALSE;
2490 store_reset(reset_point);
2491 store_pool = old_pool;
2494 else /* Could not open trust_list file. */
2495 f.trusted_config = FALSE;
2498 /* Not root; don't trust config */
2499 f.trusted_config = FALSE;
2503 config_main_filelist = argrest;
2504 f.config_changed = TRUE;
2509 /* -D: set up a macro definition */
2512 #ifdef DISABLE_D_OPTION
2513 exim_fail("exim: -D is not available in this Exim binary\n");
2519 uschar *s = argrest;
2522 while (isspace(*s)) s++;
2524 if (*s < 'A' || *s > 'Z')
2525 exim_fail("exim: macro name set by -D must start with "
2526 "an upper case letter\n");
2528 while (isalnum(*s) || *s == '_')
2530 if (ptr < sizeof(name)-1) name[ptr++] = *s;
2534 if (ptr == 0) { badarg = TRUE; break; }
2535 while (isspace(*s)) s++;
2538 if (*s++ != '=') { badarg = TRUE; break; }
2539 while (isspace(*s)) s++;
2542 for (m = macros_user; m; m = m->next)
2543 if (Ustrcmp(m->name, name) == 0)
2544 exim_fail("exim: duplicated -D in command line\n");
2546 m = macro_create(name, s, TRUE);
2548 if (clmacro_count >= MAX_CLMACROS)
2549 exim_fail("exim: too many -D options on command line\n");
2550 clmacros[clmacro_count++] =
2551 string_sprintf("-D%s=%s", m->name, m->replacement);
2556 /* -d: Set debug level (see also -v below) or set the drop_cr option.
2557 The latter is now a no-op, retained for compatibility only. If -dd is used,
2558 debugging subprocesses of the daemon is disabled. */
2561 if (Ustrcmp(argrest, "ropcr") == 0)
2563 /* drop_cr = TRUE; */
2566 /* Use an intermediate variable so that we don't set debugging while
2567 decoding the debugging bits. */
2571 unsigned int selector = D_default;
2574 if (*argrest == 'd')
2576 f.debug_daemon = TRUE;
2580 decode_bits(&selector, 1, debug_notall, argrest,
2581 debug_options, debug_options_count, US"debug", 0);
2582 debug_selector = selector;
2587 /* -E: This is a local error message. This option is not intended for
2588 external use at all, but is not restricted to trusted callers because it
2589 does no harm (just suppresses certain error messages) and if Exim is run
2590 not setuid root it won't always be trusted when it generates error
2591 messages using this option. If there is a message id following -E, point
2592 message_reference at it, for logging. */
2595 f.local_error_message = TRUE;
2596 if (mac_ismsgid(argrest)) message_reference = argrest;
2600 /* -ex: The vacation program calls sendmail with the undocumented "-eq"
2601 option, so it looks as if historically the -oex options are also callable
2602 without the leading -o. So we have to accept them. Before the switch,
2603 anything starting -oe has been converted to -e. Exim does not support all
2604 of the sendmail error options. */
2607 if (Ustrcmp(argrest, "e") == 0)
2609 arg_error_handling = ERRORS_SENDER;
2610 errors_sender_rc = EXIT_SUCCESS;
2612 else if (Ustrcmp(argrest, "m") == 0) arg_error_handling = ERRORS_SENDER;
2613 else if (Ustrcmp(argrest, "p") == 0) arg_error_handling = ERRORS_STDERR;
2614 else if (Ustrcmp(argrest, "q") == 0) arg_error_handling = ERRORS_STDERR;
2615 else if (Ustrcmp(argrest, "w") == 0) arg_error_handling = ERRORS_SENDER;
2620 /* -F: Set sender's full name, used instead of the gecos entry from
2621 the password file. Since users can usually alter their gecos entries,
2622 there's no security involved in using this instead. The data can follow
2623 the -F or be in the next argument. */
2627 if (++i < argc) argrest = argv[i]; else { badarg = TRUE; break; }
2628 originator_name = string_copy_taint(exim_str_fail_toolong(argrest, EXIM_HUMANNAME_MAX, "-F"), TRUE);
2629 f.sender_name_forced = TRUE;
2633 /* -f: Set sender's address - this value is only actually used if Exim is
2634 run by a trusted user, or if untrusted_set_sender is set and matches the
2635 address, except that the null address can always be set by any user. The
2636 test for this happens later, when the value given here is ignored when not
2637 permitted. For an untrusted user, the actual sender is still put in Sender:
2638 if it doesn't match the From: header (unless no_local_from_check is set).
2639 The data can follow the -f or be in the next argument. The -r switch is an
2640 obsolete form of -f but since there appear to be programs out there that
2641 use anything that sendmail has ever supported, better accept it - the
2642 synonymizing is done before the switch above.
2644 At this stage, we must allow domain literal addresses, because we don't
2645 know what the setting of allow_domain_literals is yet. Ditto for trailing
2646 dots and strip_trailing_dot. */
2650 int dummy_start, dummy_end;
2653 if (i+1 < argc) argrest = argv[++i]; else { badarg = TRUE; break; }
2654 (void) exim_str_fail_toolong(argrest, EXIM_DISPLAYMAIL_MAX, "-f");
2656 *(sender_address = store_get(1, FALSE)) = '\0'; /* Ensure writeable memory */
2659 uschar * temp = argrest + Ustrlen(argrest) - 1;
2660 while (temp >= argrest && isspace(*temp)) temp--;
2661 if (temp >= argrest && *temp == '.') f_end_dot = TRUE;
2662 allow_domain_literals = TRUE;
2663 strip_trailing_dot = TRUE;
2665 allow_utf8_domains = TRUE;
2667 if (!(sender_address = parse_extract_address(argrest, &errmess,
2668 &dummy_start, &dummy_end, &sender_address_domain, TRUE)))
2669 exim_fail("exim: bad -f address \"%s\": %s\n", argrest, errmess);
2671 sender_address = string_copy_taint(sender_address, TRUE);
2673 message_smtputf8 = string_is_utf8(sender_address);
2674 allow_utf8_domains = FALSE;
2676 allow_domain_literals = FALSE;
2677 strip_trailing_dot = FALSE;
2679 f.sender_address_forced = TRUE;
2683 /* -G: sendmail invocation to specify that it's a gateway submission and
2684 sendmail may complain about problems instead of fixing them.
2685 We make it equivalent to an ACL "control = suppress_local_fixups" and do
2686 not at this time complain about problems. */
2692 /* -h: Set the hop count for an incoming message. Exim does not currently
2693 support this; it always computes it by counting the Received: headers.
2694 To put it in will require a change to the spool header file format. */
2698 if (++i < argc) argrest = argv[i]; else { badarg = TRUE; break; }
2699 if (!isdigit(*argrest)) badarg = TRUE;
2703 /* -i: Set flag so dot doesn't end non-SMTP input (same as -oi, seems
2704 not to be documented for sendmail but mailx (at least) uses it) */
2707 if (!*argrest) f.dot_ends = FALSE; else badarg = TRUE;
2711 /* -L: set the identifier used for syslog; equivalent to setting
2712 syslog_processname in the config file, but needs to be an admin option. */
2716 if (++i < argc) argrest = argv[i]; else { badarg = TRUE; break; }
2717 if ((sz = Ustrlen(argrest)) > 32)
2718 exim_fail("exim: the -L syslog name is too long: \"%s\"\n", argrest);
2720 exim_fail("exim: the -L syslog name is too short\n");
2721 cmdline_syslog_name = string_copy_taint(argrest, TRUE);
2725 receiving_message = FALSE;
2727 /* -MC: continue delivery of another message via an existing open
2728 file descriptor. This option is used for an internal call by the
2729 smtp transport when there is a pending message waiting to go to an
2730 address to which it has got a connection. Five subsequent arguments are
2731 required: transport name, host name, IP address, sequence number, and
2732 message_id. Transports may decline to create new processes if the sequence
2733 number gets too big. The channel is stdin. This (-MC) must be the last
2734 argument. There's a subsequent check that the real-uid is privileged.
2736 If we are running in the test harness. delay for a bit, to let the process
2737 that set this one up complete. This makes for repeatability of the logging,
2740 if (Ustrcmp(argrest, "C") == 0)
2742 union sockaddr_46 interface_sock;
2743 EXIM_SOCKLEN_T size = sizeof(interface_sock);
2746 exim_fail("exim: too many or too few arguments after -MC\n");
2748 if (msg_action_arg >= 0)
2749 exim_fail("exim: incompatible arguments\n");
2751 continue_transport = string_copy_taint(exim_str_fail_toolong(argv[++i], EXIM_DRIVERNAME_MAX, "-C internal transport"), TRUE);
2752 continue_hostname = string_copy_taint(exim_str_fail_toolong(argv[++i], EXIM_HOSTNAME_MAX, "-C internal hostname"), TRUE);
2753 continue_host_address = string_copy_taint(exim_str_fail_toolong(argv[++i], EXIM_IPADDR_MAX, "-C internal hostaddr"), TRUE);
2754 continue_sequence = Uatoi(argv[++i]);
2755 msg_action = MSG_DELIVER;
2756 msg_action_arg = ++i;
2757 forced_delivery = TRUE;
2758 queue_run_pid = passed_qr_pid;
2759 queue_run_pipe = passed_qr_pipe;
2761 if (!mac_ismsgid(argv[i]))
2762 exim_fail("exim: malformed message id %s after -MC option\n",
2765 /* Set up $sending_ip_address and $sending_port, unless proxied */
2767 if (!continue_proxy_cipher)
2768 if (getsockname(fileno(stdin), (struct sockaddr *)(&interface_sock),
2770 sending_ip_address = host_ntoa(-1, &interface_sock, NULL,
2773 exim_fail("exim: getsockname() failed after -MC option: %s\n",
2776 testharness_pause_ms(500);
2780 else if (*argrest == 'C' && argrest[1] && !argrest[2])
2784 /* -MCA: set the smtp_authenticated flag; this is useful only when it
2785 precedes -MC (see above). The flag indicates that the host to which
2786 Exim is connected has accepted an AUTH sequence. */
2788 case 'A': f.smtp_authenticated = TRUE; break;
2790 /* -MCD: set the smtp_use_dsn flag; this indicates that the host
2791 that exim is connected to supports the esmtp extension DSN */
2793 case 'D': smtp_peer_options |= OPTION_DSN; break;
2795 /* -MCd: for debug, set a process-purpose string */
2797 case 'd': if (++i < argc)
2798 process_purpose = string_copy_taint(exim_str_fail_toolong(argv[i], EXIM_DRIVERNAME_MAX, "-MCd"), TRUE);
2802 /* -MCG: set the queue name, to a non-default value */
2804 case 'G': if (++i < argc) queue_name = string_copy_taint(exim_str_fail_toolong(argv[i], EXIM_DRIVERNAME_MAX, "-MCG"), TRUE);
2808 /* -MCK: the peer offered CHUNKING. Must precede -MC */
2810 case 'K': smtp_peer_options |= OPTION_CHUNKING; break;
2812 /* -MCP: set the smtp_use_pipelining flag; this is useful only when
2813 it preceded -MC (see above) */
2815 case 'P': smtp_peer_options |= OPTION_PIPE; break;
2817 /* -MCQ: pass on the pid of the queue-running process that started
2818 this chain of deliveries and the fd of its synchronizing pipe; this
2819 is useful only when it precedes -MC (see above) */
2821 case 'Q': if (++i < argc) passed_qr_pid = (pid_t)(Uatol(argv[i]));
2823 if (++i < argc) passed_qr_pipe = (int)(Uatol(argv[i]));
2827 /* -MCS: set the smtp_use_size flag; this is useful only when it
2828 precedes -MC (see above) */
2830 case 'S': smtp_peer_options |= OPTION_SIZE; break;
2833 /* -MCs: used with -MCt; SNI was sent */
2834 /* -MCr: ditto, DANE */
2837 case 's': if (++i < argc)
2839 continue_proxy_sni = string_copy_taint(exim_str_fail_toolong(argv[i], EXIM_HOSTNAME_MAX, "-MCr/-MCs"), TRUE);
2840 if (argrest[1] == 'r') continue_proxy_dane = TRUE;
2845 /* -MCt: similar to -MCT below but the connection is still open
2846 via a proxy process which handles the TLS context and coding.
2847 Require three arguments for the proxied local address and port,
2848 and the TLS cipher. */
2850 case 't': if (++i < argc)
2851 sending_ip_address = string_copy_taint(exim_str_fail_toolong(argv[i], EXIM_IPADDR_MAX, "-MCt IP"), TRUE);
2854 sending_port = (int)(Uatol(argv[i]));
2857 continue_proxy_cipher = string_copy_taint(exim_str_fail_toolong(argv[i], EXIM_CIPHERNAME_MAX, "-MCt cipher"), TRUE);
2861 /* -MCT: set the tls_offered flag; this is useful only when it
2862 precedes -MC (see above). The flag indicates that the host to which
2863 Exim is connected has offered TLS support. */
2865 case 'T': smtp_peer_options |= OPTION_TLS; break;
2868 default: badarg = TRUE; break;
2873 /* -M[x]: various operations on the following list of message ids:
2874 -M deliver the messages, ignoring next retry times and thawing
2875 -Mc deliver the messages, checking next retry times, no thawing
2876 -Mf freeze the messages
2877 -Mg give up on the messages
2878 -Mt thaw the messages
2879 -Mrm remove the messages
2880 In the above cases, this must be the last option. There are also the
2881 following options which are followed by a single message id, and which
2882 act on that message. Some of them use the "recipient" addresses as well.
2883 -Mar add recipient(s)
2884 -MG move to a different queue
2885 -Mmad mark all recipients delivered
2886 -Mmd mark recipients(s) delivered
2888 -Mset load a message for use with -be
2890 -Mvc show copy (of whole message, in RFC 2822 format)
2897 msg_action = MSG_DELIVER;
2898 forced_delivery = f.deliver_force_thaw = TRUE;
2900 else if (Ustrcmp(argrest, "ar") == 0)
2902 msg_action = MSG_ADD_RECIPIENT;
2903 one_msg_action = TRUE;
2905 else if (Ustrcmp(argrest, "c") == 0) msg_action = MSG_DELIVER;
2906 else if (Ustrcmp(argrest, "es") == 0)
2908 msg_action = MSG_EDIT_SENDER;
2909 one_msg_action = TRUE;
2911 else if (Ustrcmp(argrest, "f") == 0) msg_action = MSG_FREEZE;
2912 else if (Ustrcmp(argrest, "g") == 0)
2914 msg_action = MSG_DELIVER;
2915 deliver_give_up = TRUE;
2917 else if (Ustrcmp(argrest, "G") == 0)
2919 msg_action = MSG_SETQUEUE;
2920 queue_name_dest = string_copy_taint(exim_str_fail_toolong(argv[++i], EXIM_DRIVERNAME_MAX, "-MG"), TRUE);
2922 else if (Ustrcmp(argrest, "mad") == 0)
2924 msg_action = MSG_MARK_ALL_DELIVERED;
2926 else if (Ustrcmp(argrest, "md") == 0)
2928 msg_action = MSG_MARK_DELIVERED;
2929 one_msg_action = TRUE;
2931 else if (Ustrcmp(argrest, "rm") == 0) msg_action = MSG_REMOVE;
2932 else if (Ustrcmp(argrest, "set") == 0)
2934 msg_action = MSG_LOAD;
2935 one_msg_action = TRUE;
2937 else if (Ustrcmp(argrest, "t") == 0) msg_action = MSG_THAW;
2938 else if (Ustrcmp(argrest, "vb") == 0)
2940 msg_action = MSG_SHOW_BODY;
2941 one_msg_action = TRUE;
2943 else if (Ustrcmp(argrest, "vc") == 0)
2945 msg_action = MSG_SHOW_COPY;
2946 one_msg_action = TRUE;
2948 else if (Ustrcmp(argrest, "vh") == 0)
2950 msg_action = MSG_SHOW_HEADER;
2951 one_msg_action = TRUE;
2953 else if (Ustrcmp(argrest, "vl") == 0)
2955 msg_action = MSG_SHOW_LOG;
2956 one_msg_action = TRUE;
2958 else { badarg = TRUE; break; }
2960 /* All the -Mxx options require at least one message id. */
2962 msg_action_arg = i + 1;
2963 if (msg_action_arg >= argc)
2964 exim_fail("exim: no message ids given after %s option\n", arg);
2966 /* Some require only message ids to follow */
2968 if (!one_msg_action)
2970 for (int j = msg_action_arg; j < argc; j++) if (!mac_ismsgid(argv[j]))
2971 exim_fail("exim: malformed message id %s after %s option\n",
2973 goto END_ARG; /* Remaining args are ids */
2976 /* Others require only one message id, possibly followed by addresses,
2977 which will be handled as normal arguments. */
2981 if (!mac_ismsgid(argv[msg_action_arg]))
2982 exim_fail("exim: malformed message id %s after %s option\n",
2983 argv[msg_action_arg], arg);
2989 /* Some programs seem to call the -om option without the leading o;
2990 for sendmail it askes for "me too". Exim always does this. */
2993 if (*argrest) badarg = TRUE;
2997 /* -N: don't do delivery - a debugging option that stops transports doing
2998 their thing. It implies debugging at the D_v level. */
3003 f.dont_deliver = TRUE;
3004 debug_selector |= D_v;
3005 debug_file = stderr;
3011 /* -n: This means "don't alias" in sendmail, apparently.
3012 For normal invocations, it has no effect.
3013 It may affect some other options. */
3019 /* -O: Just ignore it. In sendmail, apparently -O option=value means set
3020 option to the specified value. This form uses long names. We need to handle
3021 -O option=value and -Ooption=value. */
3026 exim_fail("exim: string expected after -O\n");
3032 /* -oA: Set an argument for the bi command (sendmail's "alternate alias
3035 if (!*(alias_arg = argrest))
3036 if (i+1 < argc) alias_arg = argv[++i];
3037 else exim_fail("exim: string expected after -oA\n");
3040 /* -oB: Set a connection message max value for remote deliveries */
3043 uschar * p = argrest;
3045 if (i+1 < argc && isdigit((argv[i+1][0])))
3049 connection_max_messages = 1;
3056 exim_fail("exim: number expected after -oB\n");
3057 connection_max_messages = Uatoi(p);
3062 /* -odb: background delivery */
3065 if (Ustrcmp(argrest, "b") == 0)
3067 f.synchronous_delivery = FALSE;
3068 arg_queue_only = FALSE;
3069 queue_only_set = TRUE;
3072 /* -odd: testsuite-only: add no inter-process delays */
3074 else if (Ustrcmp(argrest, "d") == 0)
3075 f.testsuite_delays = FALSE;
3077 /* -odf: foreground delivery (smail-compatible option); same effect as
3078 -odi: interactive (synchronous) delivery (sendmail-compatible option)
3081 else if (Ustrcmp(argrest, "f") == 0 || Ustrcmp(argrest, "i") == 0)
3083 f.synchronous_delivery = TRUE;
3084 arg_queue_only = FALSE;
3085 queue_only_set = TRUE;
3088 /* -odq: queue only */
3090 else if (Ustrcmp(argrest, "q") == 0)
3092 f.synchronous_delivery = FALSE;
3093 arg_queue_only = TRUE;
3094 queue_only_set = TRUE;
3097 /* -odqs: queue SMTP only - do local deliveries and remote routing,
3098 but no remote delivery */
3100 else if (Ustrcmp(argrest, "qs") == 0)
3102 f.queue_smtp = TRUE;
3103 arg_queue_only = FALSE;
3104 queue_only_set = TRUE;
3109 /* -oex: Sendmail error flags. As these are also accepted without the
3110 leading -o prefix, for compatibility with vacation and other callers,
3111 they are handled with -e above. */
3113 /* -oi: Set flag so dot doesn't end non-SMTP input (same as -i)
3114 -oitrue: Another sendmail syntax for the same */
3117 if (!*argrest || Ustrcmp(argrest, "true") == 0)
3122 /* -oM*: Set various characteristics for an incoming message; actually
3123 acted on for trusted callers only. */
3128 exim_fail("exim: data expected after -oM%s\n", argrest);
3130 /* -oMa: Set sender host address */
3132 if (Ustrcmp(argrest, "a") == 0)
3133 sender_host_address = string_copy_taint(exim_str_fail_toolong(argv[++i], EXIM_IPADDR_MAX, "-oMa"), TRUE);
3135 /* -oMaa: Set authenticator name */
3137 else if (Ustrcmp(argrest, "aa") == 0)
3138 sender_host_authenticated = string_copy_taint(exim_str_fail_toolong(argv[++i], EXIM_DRIVERNAME_MAX, "-oMaa"), TRUE);
3140 /* -oMas: setting authenticated sender */
3142 else if (Ustrcmp(argrest, "as") == 0)
3143 authenticated_sender = string_copy_taint(exim_str_fail_toolong(argv[++i], EXIM_EMAILADDR_MAX, "-oMas"), TRUE);
3145 /* -oMai: setting authenticated id */
3147 else if (Ustrcmp(argrest, "ai") == 0)
3148 authenticated_id = string_copy_taint(exim_str_fail_toolong(argv[++i], EXIM_EMAILADDR_MAX, "-oMas"), TRUE);
3150 /* -oMi: Set incoming interface address */
3152 else if (Ustrcmp(argrest, "i") == 0)
3153 interface_address = string_copy_taint(exim_str_fail_toolong(argv[++i], EXIM_IPADDR_MAX, "-oMi"), TRUE);
3155 /* -oMm: Message reference */
3157 else if (Ustrcmp(argrest, "m") == 0)
3159 if (!mac_ismsgid(argv[i+1]))
3160 exim_fail("-oMm must be a valid message ID\n");
3161 if (!f.trusted_config)
3162 exim_fail("-oMm must be called by a trusted user/config\n");
3163 message_reference = argv[++i];
3166 /* -oMr: Received protocol */
3168 else if (Ustrcmp(argrest, "r") == 0)
3170 if (received_protocol)
3171 exim_fail("received_protocol is set already\n");
3173 received_protocol = string_copy_taint(exim_str_fail_toolong(argv[++i], EXIM_DRIVERNAME_MAX, "-oMr"), TRUE);
3175 /* -oMs: Set sender host name */
3177 else if (Ustrcmp(argrest, "s") == 0)
3178 sender_host_name = string_copy_taint(exim_str_fail_toolong(argv[++i], EXIM_HOSTNAME_MAX, "-oMs"), TRUE);
3180 /* -oMt: Set sender ident */
3182 else if (Ustrcmp(argrest, "t") == 0)
3184 sender_ident_set = TRUE;
3185 sender_ident = string_copy_taint(exim_str_fail_toolong(argv[++i], EXIM_IDENTUSER_MAX, "-oMt"), TRUE);
3188 /* Else a bad argument */
3195 /* -om: Me-too flag for aliases. Exim always does this. Some programs
3196 seem to call this as -m (undocumented), so that is also accepted (see
3198 /* -oo: An ancient flag for old-style addresses which still seems to
3199 crop up in some calls (see in SCO). */
3203 if (*argrest) badarg = TRUE;
3206 /* -oP <name>: set pid file path for daemon
3207 -oPX: delete pid file of daemon */
3210 if (!f.running_in_test_harness && real_uid != root_uid && real_uid != exim_uid)
3211 exim_fail("exim: only uid=%d or uid=%d can use -oP and -oPX "
3212 "(uid=%d euid=%d | %d)\n",
3213 root_uid, exim_uid, getuid(), geteuid(), real_uid);
3214 if (!*argrest) override_pid_file_path = argv[++i];
3215 else if (Ustrcmp(argrest, "X") == 0) delete_pid_file();
3220 /* -or <n>: set timeout for non-SMTP acceptance
3221 -os <n>: set timeout for SMTP acceptance */
3226 int * tp = argrest[-1] == 'r'
3227 ? &arg_receive_timeout : &arg_smtp_receive_timeout;
3229 *tp = readconf_readtime(argrest, 0, FALSE);
3230 else if (i+1 < argc)
3231 *tp = readconf_readtime(argv[++i], 0, FALSE);
3234 exim_fail("exim: bad time value %s: abandoned\n", argv[i]);
3238 /* -oX <list>: Override local_interfaces and/or default daemon ports */
3239 /* Limits: Is there a real limit we want here? 1024 is very arbitrary. */
3242 if (*argrest) badarg = TRUE;
3243 else override_local_interfaces = string_copy_taint(exim_str_fail_toolong(argv[++i], 1024, "-oX"), TRUE);
3246 /* Unknown -o argument */
3254 /* -ps: force Perl startup; -pd force delayed Perl startup */
3258 if (*argrest == 's' && argrest[1] == 0)
3260 perl_start_option = 1;
3263 if (*argrest == 'd' && argrest[1] == 0)
3265 perl_start_option = -1;
3270 /* -panythingelse is taken as the Sendmail-compatible argument -prval:sval,
3271 which sets the host protocol and host name */
3274 if (i+1 < argc) argrest = argv[++i]; else { badarg = TRUE; break; }
3278 uschar * hn = Ustrchr(argrest, ':');
3280 if (received_protocol)
3281 exim_fail("received_protocol is set already\n");
3284 received_protocol = string_copy_taint(exim_str_fail_toolong(argrest, EXIM_DRIVERNAME_MAX, "-p<protocol>"), TRUE);
3287 (void) exim_str_fail_toolong(argrest, (EXIM_DRIVERNAME_MAX+1+EXIM_HOSTNAME_MAX), "-p<protocol>:<host>");
3288 received_protocol = string_copyn_taint(argrest, hn - argrest, TRUE);
3289 sender_host_name = string_copy_taint(hn + 1, TRUE);
3296 receiving_message = FALSE;
3297 if (queue_interval >= 0)
3298 exim_fail("exim: -q specified more than once\n");
3300 /* -qq...: Do queue runs in a 2-stage manner */
3302 if (*argrest == 'q')
3304 f.queue_2stage = TRUE;
3308 /* -qi...: Do only first (initial) deliveries */
3310 if (*argrest == 'i')
3312 f.queue_run_first_delivery = TRUE;
3316 /* -qf...: Run the queue, forcing deliveries
3317 -qff..: Ditto, forcing thawing as well */
3319 if (*argrest == 'f')
3321 f.queue_run_force = TRUE;
3322 if (*++argrest == 'f')
3324 f.deliver_force_thaw = TRUE;
3329 /* -q[f][f]l...: Run the queue only on local deliveries */
3331 if (*argrest == 'l')
3333 f.queue_run_local = TRUE;
3337 /* -q[f][f][l][G<name>]... Work on the named queue */
3339 if (*argrest == 'G')
3342 for (argrest++, i = 0; argrest[i] && argrest[i] != '/'; ) i++;
3343 exim_len_fail_toolong(i, EXIM_DRIVERNAME_MAX, "-q*G<name>");
3344 queue_name = string_copyn(argrest, i);
3346 if (*argrest == '/') argrest++;
3349 /* -q[f][f][l][G<name>]: Run the queue, optionally forced, optionally local
3350 only, optionally named, optionally starting from a given message id. */
3352 if (!(list_queue || count_queue))
3354 && (i + 1 >= argc || argv[i+1][0] == '-' || mac_ismsgid(argv[i+1])))
3357 if (i+1 < argc && mac_ismsgid(argv[i+1]))
3358 start_queue_run_id = string_copy_taint(argv[++i], TRUE);
3359 if (i+1 < argc && mac_ismsgid(argv[i+1]))
3360 stop_queue_run_id = string_copy_taint(argv[++i], TRUE);
3363 /* -q[f][f][l][G<name>/]<n>: Run the queue at regular intervals, optionally
3364 forced, optionally local only, optionally named. */
3366 else if ((queue_interval = readconf_readtime(*argrest ? argrest : argv[++i],
3368 exim_fail("exim: bad time value %s: abandoned\n", argv[i]);
3372 case 'R': /* Synonymous with -qR... */
3374 const uschar *tainted_selectstr;
3376 receiving_message = FALSE;
3378 /* -Rf: As -R (below) but force all deliveries,
3379 -Rff: Ditto, but also thaw all frozen messages,
3380 -Rr: String is regex
3381 -Rrf: Regex and force
3382 -Rrff: Regex and force and thaw
3384 in all cases provided there are no further characters in this
3388 for (int i = 0; i < nelem(rsopts); i++)
3389 if (Ustrcmp(argrest, rsopts[i]) == 0)
3391 if (i != 2) f.queue_run_force = TRUE;
3392 if (i >= 2) f.deliver_selectstring_regex = TRUE;
3393 if (i == 1 || i == 4) f.deliver_force_thaw = TRUE;
3394 argrest += Ustrlen(rsopts[i]);
3397 /* -R: Set string to match in addresses for forced queue run to
3398 pick out particular messages. */
3400 /* Avoid attacks from people providing very long strings, and do so before
3403 tainted_selectstr = argrest;
3404 else if (i+1 < argc)
3405 tainted_selectstr = argv[++i];
3407 exim_fail("exim: string expected after -R\n");
3408 deliver_selectstring = string_copy_taint(exim_str_fail_toolong(tainted_selectstr, EXIM_EMAILADDR_MAX, "-R"), TRUE);
3412 /* -r: an obsolete synonym for -f (see above) */
3415 /* -S: Like -R but works on sender. */
3417 case 'S': /* Synonymous with -qS... */
3419 const uschar *tainted_selectstr;
3421 receiving_message = FALSE;
3423 /* -Sf: As -S (below) but force all deliveries,
3424 -Sff: Ditto, but also thaw all frozen messages,
3425 -Sr: String is regex
3426 -Srf: Regex and force
3427 -Srff: Regex and force and thaw
3429 in all cases provided there are no further characters in this
3433 for (int i = 0; i < nelem(rsopts); i++)
3434 if (Ustrcmp(argrest, rsopts[i]) == 0)
3436 if (i != 2) f.queue_run_force = TRUE;
3437 if (i >= 2) f.deliver_selectstring_sender_regex = TRUE;
3438 if (i == 1 || i == 4) f.deliver_force_thaw = TRUE;
3439 argrest += Ustrlen(rsopts[i]);
3442 /* -S: Set string to match in addresses for forced queue run to
3443 pick out particular messages. */
3446 tainted_selectstr = argrest;
3447 else if (i+1 < argc)
3448 tainted_selectstr = argv[++i];
3450 exim_fail("exim: string expected after -S\n");
3451 deliver_selectstring_sender = string_copy_taint(exim_str_fail_toolong(tainted_selectstr, EXIM_EMAILADDR_MAX, "-S"), TRUE);
3455 /* -Tqt is an option that is exclusively for use by the testing suite.
3456 It is not recognized in other circumstances. It allows for the setting up
3457 of explicit "queue times" so that various warning/retry things can be
3458 tested. Otherwise variability of clock ticks etc. cause problems. */
3461 if (f.running_in_test_harness && Ustrcmp(argrest, "qt") == 0)
3462 fudged_queue_times = string_copy_taint(argv[++i], TRUE);
3467 /* -t: Set flag to extract recipients from body of message. */
3470 if (!*argrest) extract_recipients = TRUE;
3472 /* -ti: Set flag to extract recipients from body of message, and also
3473 specify that dot does not end the message. */
3475 else if (Ustrcmp(argrest, "i") == 0)
3477 extract_recipients = TRUE;
3481 /* -tls-on-connect: don't wait for STARTTLS (for old clients) */
3484 else if (Ustrcmp(argrest, "ls-on-connect") == 0) tls_in.on_connect = TRUE;
3491 /* -U: This means "initial user submission" in sendmail, apparently. The
3492 doc claims that in future sendmail may refuse syntactically invalid
3493 messages instead of fixing them. For the moment, we just ignore it. */
3499 /* -v: verify things - this is a very low-level debugging */
3504 debug_selector |= D_v;
3505 debug_file = stderr;
3511 /* -x: AIX uses this to indicate some fancy 8-bit character stuff:
3513 The -x flag tells the sendmail command that mail from a local
3514 mail program has National Language Support (NLS) extended characters
3515 in the body of the mail item. The sendmail command can send mail with
3516 extended NLS characters across networks that normally corrupts these
3519 As Exim is 8-bit clean, it just ignores this flag. */
3522 if (*argrest) badarg = TRUE;
3525 /* -X: in sendmail: takes one parameter, logfile, and sends debugging
3526 logs to that file. We swallow the parameter and otherwise ignore it. */
3531 exim_fail("exim: string expected after -X\n");
3534 /* -z: a line of text to log */
3539 log_oneline = string_copy_taint(exim_str_fail_toolong(argv[i], 2048, "-z logtext"), TRUE);
3541 exim_fail("exim: file name expected after %s\n", argv[i-1]);
3544 /* All other initial characters are errors */
3549 } /* End of high-level switch statement */
3551 /* Failed to recognize the option, or syntax error */
3554 exim_fail("exim abandoned: unknown, malformed, or incomplete "
3555 "option %s\n", arg);
3559 /* If -R or -S have been specified without -q, assume a single queue run. */
3561 if ( (deliver_selectstring || deliver_selectstring_sender)
3562 && queue_interval < 0)
3567 store_pool = old_pool;
3570 /* If usage_wanted is set we call the usage function - which never returns */
3571 if (usage_wanted) exim_usage(called_as);
3573 /* Arguments have been processed. Check for incompatibilities. */
3575 (smtp_input || extract_recipients || recipients_arg < argc) &&
3576 (f.daemon_listen || queue_interval >= 0 || bi_option ||
3577 test_retry_arg >= 0 || test_rewrite_arg >= 0 ||
3578 filter_test != FTEST_NONE || (msg_action_arg > 0 && !one_msg_action))
3581 msg_action_arg > 0 &&
3582 (f.daemon_listen || queue_interval > 0 || list_options ||
3583 (checking && msg_action != MSG_LOAD) ||
3584 bi_option || test_retry_arg >= 0 || test_rewrite_arg >= 0)
3587 (f.daemon_listen || queue_interval > 0) &&
3588 (sender_address != NULL || list_options || list_queue || checking ||
3592 f.daemon_listen && queue_interval == 0
3595 f.inetd_wait_mode && queue_interval >= 0
3599 (checking || smtp_input || extract_recipients ||
3600 filter_test != FTEST_NONE || bi_option)
3603 verify_address_mode &&
3604 (f.address_test_mode || smtp_input || extract_recipients ||
3605 filter_test != FTEST_NONE || bi_option)
3608 f.address_test_mode && (smtp_input || extract_recipients ||
3609 filter_test != FTEST_NONE || bi_option)
3612 smtp_input && (sender_address != NULL || filter_test != FTEST_NONE ||
3616 deliver_selectstring != NULL && queue_interval < 0
3619 msg_action == MSG_LOAD &&
3620 (!expansion_test || expansion_test_message != NULL)
3623 exim_fail("exim: incompatible command-line options or arguments\n");
3625 /* If debugging is set up, set the file and the file descriptor to pass on to
3626 child processes. It should, of course, be 2 for stderr. Also, force the daemon
3627 to run in the foreground. */
3629 if (debug_selector != 0)
3631 debug_file = stderr;
3632 debug_fd = fileno(debug_file);
3633 f.background_daemon = FALSE;
3634 testharness_pause_ms(100); /* lets caller finish */
3635 if (debug_selector != D_v) /* -v only doesn't show this */
3637 debug_printf("Exim version %s uid=%ld gid=%ld pid=%d D=%x\n",
3638 version_string, (long int)real_uid, (long int)real_gid, (int)getpid(),
3640 if (!version_printed)
3641 show_whats_supported(stderr);
3645 /* When started with root privilege, ensure that the limits on the number of
3646 open files and the number of processes (where that is accessible) are
3647 sufficiently large, or are unset, in case Exim has been called from an
3648 environment where the limits are screwed down. Not all OS have the ability to
3649 change some of these limits. */
3653 DEBUG(D_any) debug_print_ids(US"Exim has no root privilege:");
3659 #ifdef RLIMIT_NOFILE
3660 if (getrlimit(RLIMIT_NOFILE, &rlp) < 0)
3662 log_write(0, LOG_MAIN|LOG_PANIC, "getrlimit(RLIMIT_NOFILE) failed: %s",
3664 rlp.rlim_cur = rlp.rlim_max = 0;
3667 /* I originally chose 1000 as a nice big number that was unlikely to
3668 be exceeded. It turns out that some older OS have a fixed upper limit of
3671 if (rlp.rlim_cur < 1000)
3673 rlp.rlim_cur = rlp.rlim_max = 1000;
3674 if (setrlimit(RLIMIT_NOFILE, &rlp) < 0)
3676 rlp.rlim_cur = rlp.rlim_max = 256;
3677 if (setrlimit(RLIMIT_NOFILE, &rlp) < 0)
3678 log_write(0, LOG_MAIN|LOG_PANIC, "setrlimit(RLIMIT_NOFILE) failed: %s",
3685 if (getrlimit(RLIMIT_NPROC, &rlp) < 0)
3687 log_write(0, LOG_MAIN|LOG_PANIC, "getrlimit(RLIMIT_NPROC) failed: %s",
3689 rlp.rlim_cur = rlp.rlim_max = 0;
3692 #ifdef RLIM_INFINITY
3693 if (rlp.rlim_cur != RLIM_INFINITY && rlp.rlim_cur < 1000)
3695 rlp.rlim_cur = rlp.rlim_max = RLIM_INFINITY;
3697 if (rlp.rlim_cur < 1000)
3699 rlp.rlim_cur = rlp.rlim_max = 1000;
3701 if (setrlimit(RLIMIT_NPROC, &rlp) < 0)
3702 log_write(0, LOG_MAIN|LOG_PANIC, "setrlimit(RLIMIT_NPROC) failed: %s",
3708 /* Exim is normally entered as root (but some special configurations are
3709 possible that don't do this). However, it always spins off sub-processes that
3710 set their uid and gid as required for local delivery. We don't want to pass on
3711 any extra groups that root may belong to, so we want to get rid of them all at
3714 We need to obey setgroups() at this stage, before possibly giving up root
3715 privilege for a changed configuration file, but later on we might need to
3716 check on the additional groups for the admin user privilege - can't do that
3717 till after reading the config, which might specify the exim gid. Therefore,
3718 save the group list here first. */
3720 if ((group_count = getgroups(nelem(group_list), group_list)) < 0)
3721 exim_fail("exim: getgroups() failed: %s\n", strerror(errno));
3723 /* There is a fundamental difference in some BSD systems in the matter of
3724 groups. FreeBSD and BSDI are known to be different; NetBSD and OpenBSD are
3725 known not to be different. On the "different" systems there is a single group
3726 list, and the first entry in it is the current group. On all other versions of
3727 Unix there is a supplementary group list, which is in *addition* to the current
3728 group. Consequently, to get rid of all extraneous groups on a "standard" system
3729 you pass over 0 groups to setgroups(), while on a "different" system you pass
3730 over a single group - the current group, which is always the first group in the
3731 list. Calling setgroups() with zero groups on a "different" system results in
3732 an error return. The following code should cope with both types of system.
3734 Unfortunately, recent MacOS, which should be a FreeBSD, "helpfully" succeeds
3735 the "setgroups() with zero groups" - and changes the egid.
3736 Thanks to that we had to stash the original_egid above, for use below
3737 in the call to exim_setugid().
3739 However, if this process isn't running as root, setgroups() can't be used
3740 since you have to be root to run it, even if throwing away groups.
3741 Except, sigh, for Hurd - where you can.
3742 Not being root here happens only in some unusual configurations. */
3745 #ifndef OS_SETGROUPS_ZERO_DROPS_ALL
3746 && setgroups(0, NULL) != 0
3748 && setgroups(1, group_list) != 0)
3749 exim_fail("exim: setgroups() failed: %s\n", strerror(errno));
3751 /* If the configuration file name has been altered by an argument on the
3752 command line (either a new file name or a macro definition) and the caller is
3753 not root, or if this is a filter testing run, remove any setuid privilege the
3754 program has and run as the underlying user.
3756 The exim user is locked out of this, which severely restricts the use of -C
3759 Otherwise, set the real ids to the effective values (should be root unless run
3760 from inetd, which it can either be root or the exim uid, if one is configured).
3762 There is a private mechanism for bypassing some of this, in order to make it
3763 possible to test lots of configurations automatically, without having either to
3764 recompile each time, or to patch in an actual configuration file name and other
3765 values (such as the path name). If running in the test harness, pretend that
3766 configuration file changes and macro definitions haven't happened. */
3769 (!f.trusted_config || /* Config changed, or */
3770 !macros_trusted(opt_D_used)) && /* impermissible macros and */
3771 real_uid != root_uid && /* Not root, and */
3772 !f.running_in_test_harness /* Not fudged */
3774 expansion_test /* expansion testing */
3776 filter_test != FTEST_NONE) /* Filter testing */
3778 setgroups(group_count, group_list);
3779 exim_setugid(real_uid, real_gid, FALSE,
3780 US"-C, -D, -be or -bf forces real uid");
3781 removed_privilege = TRUE;
3783 /* In the normal case when Exim is called like this, stderr is available
3784 and should be used for any logging information because attempts to write
3785 to the log will usually fail. To arrange this, we unset really_exim. However,
3786 if no stderr is available there is no point - we might as well have a go
3787 at the log (if it fails, syslog will be written).
3789 Note that if the invoker is Exim, the logs remain available. Messing with
3790 this causes unlogged successful deliveries. */
3792 if (log_stderr && real_uid != exim_uid)
3793 f.really_exim = FALSE;
3796 /* Privilege is to be retained for the moment. It may be dropped later,
3797 depending on the job that this Exim process has been asked to do. For now, set
3798 the real uid to the effective so that subsequent re-execs of Exim are done by a
3802 exim_setugid(geteuid(), original_egid, FALSE, US"forcing real = effective");
3804 /* If testing a filter, open the file(s) now, before wasting time doing other
3805 setups and reading the message. */
3807 if (filter_test & FTEST_SYSTEM)
3808 if ((filter_sfd = Uopen(filter_test_sfile, O_RDONLY, 0)) < 0)
3809 exim_fail("exim: failed to open %s: %s\n", filter_test_sfile,
3812 if (filter_test & FTEST_USER)
3813 if ((filter_ufd = Uopen(filter_test_ufile, O_RDONLY, 0)) < 0)
3814 exim_fail("exim: failed to open %s: %s\n", filter_test_ufile,
3817 /* Initialise lookup_list
3818 If debugging, already called above via version reporting.
3819 In either case, we initialise the list of available lookups while running
3820 as root. All dynamically modules are loaded from a directory which is
3821 hard-coded into the binary and is code which, if not a module, would be
3822 part of Exim already. Ability to modify the content of the directory
3823 is equivalent to the ability to modify a setuid binary!
3825 This needs to happen before we read the main configuration. */
3829 if (f.running_in_test_harness) smtputf8_advertise_hosts = NULL;
3832 /* Read the main runtime configuration data; this gives up if there
3833 is a failure. It leaves the configuration file open so that the subsequent
3834 configuration data for delivery can be read if needed.
3836 NOTE: immediately after opening the configuration file we change the working
3837 directory to "/"! Later we change to $spool_directory. We do it there, because
3838 during readconf_main() some expansion takes place already. */
3840 /* Store the initial cwd before we change directories. Can be NULL if the
3841 dir has already been unlinked. */
3843 initial_cwd = os_getcwd(NULL, 0);
3844 if (!initial_cwd && errno)
3845 exim_fail("exim: getting initial cwd failed: %s\n", strerror(errno));
3847 if (initial_cwd && (strlen(CCS initial_cwd) >= BIG_BUFFER_SIZE))
3848 exim_fail("exim: initial cwd is far too long (%d)\n", Ustrlen(CCS initial_cwd));
3851 -be[m] expansion test -
3852 -b[fF] filter test new
3854 -bmalware malware_test_file new
3856 -brw rewrite test new
3858 -bv[s] address verify -
3860 -bP <option> (except -bP config, which sets list_config)
3862 If any of these options is set, we suppress warnings about configuration
3863 issues (currently about tls_advertise_hosts and keep_environment not being
3867 #ifdef MEASURE_TIMING
3868 struct timeval t0, diff;
3869 (void)gettimeofday(&t0, NULL);
3872 readconf_main(checking || list_options);
3874 #ifdef MEASURE_TIMING
3875 report_time_since(&t0, US"readconf_main (delta)");
3880 /* Now in directory "/" */
3882 if (cleanup_environment() == FALSE)
3883 log_write(0, LOG_PANIC_DIE, "Can't cleanup environment");
3886 /* If an action on specific messages is requested, or if a daemon or queue
3887 runner is being started, we need to know if Exim was called by an admin user.
3888 This is the case if the real user is root or exim, or if the real group is
3889 exim, or if one of the supplementary groups is exim or a group listed in
3890 admin_groups. We don't fail all message actions immediately if not admin_user,
3891 since some actions can be performed by non-admin users. Instead, set admin_user
3892 for later interrogation. */
3894 if (real_uid == root_uid || real_uid == exim_uid || real_gid == exim_gid)
3895 f.admin_user = TRUE;
3897 for (int i = 0; i < group_count && !f.admin_user; i++)
3898 if (group_list[i] == exim_gid)
3899 f.admin_user = TRUE;
3900 else if (admin_groups)
3901 for (int j = 1; j <= (int)admin_groups[0] && !f.admin_user; j++)
3902 if (admin_groups[j] == group_list[i])
3903 f.admin_user = TRUE;
3905 /* Another group of privileged users are the trusted users. These are root,
3906 exim, and any caller matching trusted_users or trusted_groups. Trusted callers
3907 are permitted to specify sender_addresses with -f on the command line, and
3908 other message parameters as well. */
3910 if (real_uid == root_uid || real_uid == exim_uid)
3911 f.trusted_caller = TRUE;
3915 for (int i = 1; i <= (int)trusted_users[0] && !f.trusted_caller; i++)
3916 if (trusted_users[i] == real_uid)
3917 f.trusted_caller = TRUE;
3920 for (int i = 1; i <= (int)trusted_groups[0] && !f.trusted_caller; i++)
3921 if (trusted_groups[i] == real_gid)
3922 f.trusted_caller = TRUE;
3923 else for (int j = 0; j < group_count && !f.trusted_caller; j++)
3924 if (trusted_groups[i] == group_list[j])
3925 f.trusted_caller = TRUE;
3928 /* At this point, we know if the user is privileged and some command-line
3929 options become possibly impermissible, depending upon the configuration file. */
3931 if (checking && commandline_checks_require_admin && !f.admin_user)
3932 exim_fail("exim: those command-line flags are set to require admin\n");
3934 /* Handle the decoding of logging options. */
3936 decode_bits(log_selector, log_selector_size, log_notall,
3937 log_selector_string, log_options, log_options_count, US"log", 0);
3941 debug_printf("configuration file is %s\n", config_main_filename);
3942 debug_printf("log selectors =");
3943 for (int i = 0; i < log_selector_size; i++)
3944 debug_printf(" %08x", log_selector[i]);
3948 /* If domain literals are not allowed, check the sender address that was
3949 supplied with -f. Ditto for a stripped trailing dot. */
3953 if (sender_address[sender_address_domain] == '[' && !allow_domain_literals)
3954 exim_fail("exim: bad -f address \"%s\": domain literals not "
3955 "allowed\n", sender_address);
3956 if (f_end_dot && !strip_trailing_dot)
3957 exim_fail("exim: bad -f address \"%s.\": domain is malformed "
3958 "(trailing dot not allowed)\n", sender_address);
3961 /* See if an admin user overrode our logging. */
3963 if (cmdline_syslog_name)
3966 syslog_processname = cmdline_syslog_name;
3967 log_file_path = string_copy(CUS"syslog");
3970 /* not a panic, non-privileged users should not be able to spam paniclog */
3972 "exim: you lack sufficient privilege to specify syslog process name\n");
3974 /* Paranoia check of maximum lengths of certain strings. There is a check
3975 on the length of the log file path in log.c, which will come into effect
3976 if there are any calls to write the log earlier than this. However, if we
3977 get this far but the string is very long, it is better to stop now than to
3978 carry on and (e.g.) receive a message and then have to collapse. The call to
3979 log_write() from here will cause the ultimate panic collapse if the complete
3980 file name exceeds the buffer length. */
3982 if (Ustrlen(log_file_path) > 200)
3983 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3984 "log_file_path is longer than 200 chars: aborting");
3986 if (Ustrlen(pid_file_path) > 200)
3987 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3988 "pid_file_path is longer than 200 chars: aborting");
3990 if (Ustrlen(spool_directory) > 200)
3991 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3992 "spool_directory is longer than 200 chars: aborting");
3994 /* Length check on the process name given to syslog for its TAG field,
3995 which is only permitted to be 32 characters or less. See RFC 3164. */
3997 if (Ustrlen(syslog_processname) > 32)
3998 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3999 "syslog_processname is longer than 32 chars: aborting");
4004 log_write(0, LOG_MAIN, "%s", log_oneline);
4005 return EXIT_SUCCESS;
4008 return EXIT_FAILURE;
4010 /* In some operating systems, the environment variable TMPDIR controls where
4011 temporary files are created; Exim doesn't use these (apart from when delivering
4012 to MBX mailboxes), but called libraries such as DBM libraries may require them.
4013 If TMPDIR is found in the environment, reset it to the value defined in the
4014 EXIM_TMPDIR macro, if this macro is defined. For backward compatibility this
4015 macro may be called TMPDIR in old "Local/Makefile"s. It's converted to
4016 EXIM_TMPDIR by the build scripts.
4020 if (environ) for (uschar ** p = USS environ; *p; p++)
4021 if (Ustrncmp(*p, "TMPDIR=", 7) == 0 && Ustrcmp(*p+7, EXIM_TMPDIR) != 0)
4023 uschar * newp = store_malloc(Ustrlen(EXIM_TMPDIR) + 8);
4024 sprintf(CS newp, "TMPDIR=%s", EXIM_TMPDIR);
4026 DEBUG(D_any) debug_printf("reset TMPDIR=%s in environment\n", EXIM_TMPDIR);
4030 /* Timezone handling. If timezone_string is "utc", set a flag to cause all
4031 timestamps to be in UTC (gmtime() is used instead of localtime()). Otherwise,
4032 we may need to get rid of a bogus timezone setting. This can arise when Exim is
4033 called by a user who has set the TZ variable. This then affects the timestamps
4034 in log files and in Received: headers, and any created Date: header lines. The
4035 required timezone is settable in the configuration file, so nothing can be done
4036 about this earlier - but hopefully nothing will normally be logged earlier than
4037 this. We have to make a new environment if TZ is wrong, but don't bother if
4038 timestamps_utc is set, because then all times are in UTC anyway. */
4040 if (timezone_string && strcmpic(timezone_string, US"UTC") == 0)
4041 f.timestamps_utc = TRUE;
4044 uschar *envtz = US getenv("TZ");
4046 ? !timezone_string || Ustrcmp(timezone_string, envtz) != 0
4047 : timezone_string != NULL
4050 uschar **p = USS environ;
4054 if (environ) while (*p++) count++;
4055 if (!envtz) count++;
4056 newp = new = store_malloc(sizeof(uschar *) * (count + 1));
4057 if (environ) for (p = USS environ; *p; p++)
4058 if (Ustrncmp(*p, "TZ=", 3) != 0) *newp++ = *p;
4059 if (timezone_string)
4061 *newp = store_malloc(Ustrlen(timezone_string) + 4);
4062 sprintf(CS *newp++, "TZ=%s", timezone_string);
4067 DEBUG(D_any) debug_printf("Reset TZ to %s: time is %s\n", timezone_string,
4068 tod_stamp(tod_log));
4072 /* Handle the case when we have removed the setuid privilege because of -C or
4073 -D. This means that the caller of Exim was not root.
4075 There is a problem if we were running as the Exim user. The sysadmin may
4076 expect this case to retain privilege because "the binary was called by the
4077 Exim user", but it hasn't, because either the -D option set macros, or the
4078 -C option set a non-trusted configuration file. There are two possibilities:
4080 (1) If deliver_drop_privilege is set, Exim is not going to re-exec in order
4081 to do message deliveries. Thus, the fact that it is running as a
4082 non-privileged user is plausible, and might be wanted in some special
4083 configurations. However, really_exim will have been set false when
4084 privilege was dropped, to stop Exim trying to write to its normal log
4085 files. Therefore, re-enable normal log processing, assuming the sysadmin
4086 has set up the log directory correctly.
4088 (2) If deliver_drop_privilege is not set, the configuration won't work as
4089 apparently intended, and so we log a panic message. In order to retain
4090 root for -C or -D, the caller must either be root or be invoking a
4091 trusted configuration file (when deliver_drop_privilege is false). */
4093 if ( removed_privilege
4094 && (!f.trusted_config || opt_D_used)
4095 && real_uid == exim_uid)
4096 if (deliver_drop_privilege)
4097 f.really_exim = TRUE; /* let logging work normally */
4099 log_write(0, LOG_MAIN|LOG_PANIC,
4100 "exim user lost privilege for using %s option",
4101 f.trusted_config? "-D" : "-C");
4103 /* Start up Perl interpreter if Perl support is configured and there is a
4104 perl_startup option, and the configuration or the command line specifies
4105 initializing starting. Note that the global variables are actually called
4106 opt_perl_xxx to avoid clashing with perl's namespace (perl_*). */
4109 if (perl_start_option != 0)
4110 opt_perl_at_start = (perl_start_option > 0);
4111 if (opt_perl_at_start && opt_perl_startup != NULL)
4114 DEBUG(D_any) debug_printf("Starting Perl interpreter\n");
4115 if ((errstr = init_perl(opt_perl_startup)))
4116 exim_fail("exim: error in perl_startup code: %s\n", errstr);
4117 opt_perl_started = TRUE;
4119 #endif /* EXIM_PERL */
4121 /* Log the arguments of the call if the configuration file said so. This is
4122 a debugging feature for finding out what arguments certain MUAs actually use.
4123 Don't attempt it if logging is disabled, or if listing variables or if
4124 verifying/testing addresses or expansions. */
4126 if ( (debug_selector & D_any || LOGGING(arguments))
4127 && f.really_exim && !list_options && !checking)
4129 uschar *p = big_buffer;
4130 Ustrcpy(p, US"cwd= (failed)");
4136 Ustrncpy(p + 4, initial_cwd, big_buffer_size-5);
4137 p += 4 + Ustrlen(initial_cwd);
4138 /* in case p is near the end and we don't provide enough space for
4139 * string_format to be willing to write. */
4143 (void)string_format(p, big_buffer_size - (p - big_buffer), " %d args:", argc);
4145 for (int i = 0; i < argc; i++)
4147 int len = Ustrlen(argv[i]);
4148 const uschar *printing;
4150 if (p + len + 8 >= big_buffer + big_buffer_size)
4152 Ustrcpy(p, US" ...");
4153 log_write(0, LOG_MAIN, "%s", big_buffer);
4154 Ustrcpy(big_buffer, US"...");
4157 printing = string_printing(argv[i]);
4158 if (!*printing) quote = US"\"";
4161 const uschar *pp = printing;
4163 while (*pp) if (isspace(*pp++)) { quote = US"\""; break; }
4165 p += sprintf(CS p, " %s%.*s%s", quote, (int)(big_buffer_size -
4166 (p - big_buffer) - 4), printing, quote);
4169 if (LOGGING(arguments))
4170 log_write(0, LOG_MAIN, "%s", big_buffer);
4172 debug_printf("%s\n", big_buffer);
4175 /* Set the working directory to be the top-level spool directory. We don't rely
4176 on this in the code, which always uses fully qualified names, but it's useful
4177 for core dumps etc. Don't complain if it fails - the spool directory might not
4178 be generally accessible and calls with the -C option (and others) have lost
4179 privilege by now. Before the chdir, we try to ensure that the directory exists.
4182 if (Uchdir(spool_directory) != 0)
4185 (void)directory_make(spool_directory, US"", SPOOL_DIRECTORY_MODE, FALSE);
4186 dummy = /* quieten compiler */ Uchdir(spool_directory);
4187 dummy = dummy; /* yet more compiler quietening, sigh */
4190 /* Handle calls with the -bi option. This is a sendmail option to rebuild *the*
4191 alias file. Exim doesn't have such a concept, but this call is screwed into
4192 Sun's YP makefiles. Handle this by calling a configured script, as the real
4193 user who called Exim. The -oA option can be used to pass an argument to the
4198 (void)fclose(config_file);
4203 argv[i++] = bi_command;
4204 if (alias_arg) argv[i++] = alias_arg;
4207 setgroups(group_count, group_list);
4208 exim_setugid(real_uid, real_gid, FALSE, US"running bi_command");
4210 DEBUG(D_exec) debug_printf("exec %.256s %.256s\n", argv[0],
4211 argv[1] ? argv[1] : US"");
4213 execv(CS argv[0], (char *const *)argv);
4214 exim_fail("exim: exec failed: %s\n", strerror(errno));
4218 DEBUG(D_any) debug_printf("-bi used but bi_command not set; exiting\n");
4223 /* We moved the admin/trusted check to be immediately after reading the
4224 configuration file. We leave these prints here to ensure that syslog setup,
4225 logfile setup, and so on has already happened. */
4227 if (f.trusted_caller) DEBUG(D_any) debug_printf("trusted user\n");
4228 if (f.admin_user) DEBUG(D_any) debug_printf("admin user\n");
4230 /* Only an admin user may start the daemon or force a queue run in the default
4231 configuration, but the queue run restriction can be relaxed. Only an admin
4232 user may request that a message be returned to its sender forthwith. Only an
4233 admin user may specify a debug level greater than D_v (because it might show
4234 passwords, etc. in lookup queries). Only an admin user may request a queue
4235 count. Only an admin user can use the test interface to scan for email
4236 (because Exim will be in the spool dir and able to look at mails). */
4240 BOOL debugset = (debug_selector & ~D_v) != 0;
4241 if ( deliver_give_up || f.daemon_listen || malware_test_file
4242 || count_queue && queue_list_requires_admin
4243 || list_queue && queue_list_requires_admin
4244 || queue_interval >= 0 && prod_requires_admin
4245 || queue_name_dest && prod_requires_admin
4246 || debugset && !f.running_in_test_harness
4248 exim_fail("exim:%s permission denied\n", debugset? " debugging" : "");
4251 /* If the real user is not root or the exim uid, the argument for passing
4252 in an open TCP/IP connection for another message is not permitted, nor is
4253 running with the -N option for any delivery action, unless this call to exim is
4254 one that supplied an input message, or we are using a patched exim for
4255 regression testing. */
4257 if (real_uid != root_uid && real_uid != exim_uid &&
4258 (continue_hostname != NULL ||
4260 (queue_interval >= 0 || f.daemon_listen || msg_action_arg > 0)
4261 )) && !f.running_in_test_harness)
4262 exim_fail("exim: Permission denied\n");
4264 /* If the caller is not trusted, certain arguments are ignored when running for
4265 real, but are permitted when checking things (-be, -bv, -bt, -bh, -bf, -bF).
4266 Note that authority for performing certain actions on messages is tested in the
4267 queue_action() function. */
4269 if (!f.trusted_caller && !checking)
4271 sender_host_name = sender_host_address = interface_address =
4272 sender_ident = received_protocol = NULL;
4273 sender_host_port = interface_port = 0;
4274 sender_host_authenticated = authenticated_sender = authenticated_id = NULL;
4277 /* If a sender host address is set, extract the optional port number off the
4278 end of it and check its syntax. Do the same thing for the interface address.
4279 Exim exits if the syntax is bad. */
4283 if (sender_host_address != NULL)
4284 sender_host_port = check_port(sender_host_address);
4285 if (interface_address != NULL)
4286 interface_port = check_port(interface_address);
4289 /* If the caller is trusted, then they can use -G to suppress_local_fixups. */
4292 if (f.trusted_caller)
4294 f.suppress_local_fixups = f.suppress_local_fixups_default = TRUE;
4295 DEBUG(D_acl) debug_printf("suppress_local_fixups forced on by -G\n");
4298 exim_fail("exim: permission denied (-G requires a trusted user)\n");
4301 /* If an SMTP message is being received check to see if the standard input is a
4302 TCP/IP socket. If it is, we assume that Exim was called from inetd if the
4303 caller is root or the Exim user, or if the port is a privileged one. Otherwise,
4308 union sockaddr_46 inetd_sock;
4309 EXIM_SOCKLEN_T size = sizeof(inetd_sock);
4310 if (getpeername(0, (struct sockaddr *)(&inetd_sock), &size) == 0)
4312 int family = ((struct sockaddr *)(&inetd_sock))->sa_family;
4313 if (family == AF_INET || family == AF_INET6)
4315 union sockaddr_46 interface_sock;
4316 size = sizeof(interface_sock);
4318 if (getsockname(0, (struct sockaddr *)(&interface_sock), &size) == 0)
4319 interface_address = host_ntoa(-1, &interface_sock, NULL,
4322 if (host_is_tls_on_connect_port(interface_port)) tls_in.on_connect = TRUE;
4324 if (real_uid == root_uid || real_uid == exim_uid || interface_port < 1024)
4327 sender_host_address = host_ntoa(-1, (struct sockaddr *)(&inetd_sock),
4328 NULL, &sender_host_port);
4329 if (mua_wrapper) log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Input from "
4330 "inetd is not supported when mua_wrapper is set");
4334 "exim: Permission denied (unprivileged user, unprivileged port)\n");
4339 /* If the load average is going to be needed while receiving a message, get it
4340 now for those OS that require the first call to os_getloadavg() to be done as
4341 root. There will be further calls later for each message received. */
4343 #ifdef LOAD_AVG_NEEDS_ROOT
4344 if ( receiving_message
4345 && (queue_only_load >= 0 || (f.is_inetd && smtp_load_reserve >= 0)))
4346 load_average = OS_GETLOADAVG();
4349 /* The queue_only configuration option can be overridden by -odx on the command
4350 line, except that if queue_only_override is false, queue_only cannot be unset
4351 from the command line. */
4353 if (queue_only_set && (queue_only_override || arg_queue_only))
4354 queue_only = arg_queue_only;
4356 /* The receive_timeout and smtp_receive_timeout options can be overridden by
4359 if (arg_receive_timeout >= 0) receive_timeout = arg_receive_timeout;
4360 if (arg_smtp_receive_timeout >= 0)
4361 smtp_receive_timeout = arg_smtp_receive_timeout;
4363 /* If Exim was started with root privilege, unless we have already removed the
4364 root privilege above as a result of -C, -D, -be, -bf or -bF, remove it now
4365 except when starting the daemon or doing some kind of delivery or address
4366 testing (-bt). These are the only cases when root need to be retained. We run
4367 as exim for -bv and -bh. However, if deliver_drop_privilege is set, root is
4368 retained only for starting the daemon. We always do the initgroups() in this
4369 situation (controlled by the TRUE below), in order to be as close as possible
4370 to the state Exim usually runs in. */
4372 if (!unprivileged && /* originally had root AND */
4373 !removed_privilege && /* still got root AND */
4374 !f.daemon_listen && /* not starting the daemon */
4375 queue_interval <= 0 && /* (either kind of daemon) */
4377 deliver_drop_privilege || /* requested unprivileged */
4379 queue_interval < 0 && /* not running the queue */
4380 (msg_action_arg < 0 || /* and */
4381 msg_action != MSG_DELIVER) && /* not delivering and */
4382 (!checking || !f.address_test_mode) /* not address checking */
4384 exim_setugid(exim_uid, exim_gid, TRUE, US"privilege not needed");
4386 /* When we are retaining a privileged uid, we still change to the exim gid. */
4391 DEBUG(D_any) debug_printf("dropping to exim gid; retaining priv uid\n");
4392 rv = setgid(exim_gid);
4393 /* Impact of failure is that some stuff might end up with an incorrect group.
4394 We track this for failures from root, since any attempt to change privilege
4395 by root should succeed and failures should be examined. For non-root,
4396 there's no security risk. For me, it's { exim -bV } on a just-built binary,
4397 no need to complain then. */
4399 if (!(unprivileged || removed_privilege))
4400 exim_fail("exim: changing group failed: %s\n", strerror(errno));
4403 DEBUG(D_any) debug_printf("changing group to %ld failed: %s\n",
4404 (long int)exim_gid, strerror(errno));
4408 /* Handle a request to scan a file for malware */
4409 if (malware_test_file)
4411 #ifdef WITH_CONTENT_SCAN
4413 set_process_info("scanning file for malware");
4414 result = malware_in_file(malware_test_file);
4417 printf("No malware found.\n");
4422 printf("Malware lookup returned non-okay/fail: %d\n", result);
4426 printf("Malware found: %s\n", malware_name);
4428 printf("Malware scan detected malware of unknown name.\n");
4430 printf("Malware scanning not enabled at compile time.\n");
4435 /* Handle a request to list the delivery queue */
4439 set_process_info("listing the queue");
4440 queue_list(list_queue_option, argv + recipients_arg, argc - recipients_arg);
4444 /* Handle a request to count the delivery queue */
4448 set_process_info("counting the queue");
4449 fprintf(stdout, "%u\n", queue_count());
4453 /* Handle actions on specific messages, except for the force delivery and
4454 message load actions, which are done below. Some actions take a whole list of
4455 message ids, which are known to continue up to the end of the arguments. Others
4456 take a single message id and then operate on the recipients list. */
4458 if (msg_action_arg > 0 && msg_action != MSG_DELIVER && msg_action != MSG_LOAD)
4460 int yield = EXIT_SUCCESS;
4461 set_process_info("acting on specified messages");
4463 /* ACL definitions may be needed when removing a message (-Mrm) because
4464 event_action gets expanded */
4466 if (msg_action == MSG_REMOVE)
4469 if (!one_msg_action)
4471 for (i = msg_action_arg; i < argc; i++)
4472 if (!queue_action(argv[i], msg_action, NULL, 0, 0))
4473 yield = EXIT_FAILURE;
4476 case MSG_REMOVE: case MSG_FREEZE: case MSG_THAW: break;
4477 default: printf("\n"); break;
4481 else if (!queue_action(argv[msg_action_arg], msg_action, argv, argc,
4482 recipients_arg)) yield = EXIT_FAILURE;
4486 /* We used to set up here to skip reading the ACL section, on
4487 (msg_action_arg > 0 || (queue_interval == 0 && !f.daemon_listen)
4488 Now, since the intro of the ${acl } expansion, ACL definitions may be
4489 needed in transports so we lost the optimisation. */
4492 #ifdef MEASURE_TIMING
4493 struct timeval t0, diff;
4494 (void)gettimeofday(&t0, NULL);
4499 #ifdef MEASURE_TIMING
4500 report_time_since(&t0, US"readconf_rest (delta)");
4504 /* Handle the -brt option. This is for checking out retry configurations.
4505 The next three arguments are a domain name or a complete address, and
4506 optionally two error numbers. All it does is to call the function that
4507 scans the retry configuration data. */
4509 if (test_retry_arg >= 0)
4511 retry_config *yield;
4512 int basic_errno = 0;
4514 const uschar *s1, *s2;
4516 if (test_retry_arg >= argc)
4518 printf("-brt needs a domain or address argument\n");
4519 exim_exit(EXIT_FAILURE);
4521 s1 = exim_str_fail_toolong(argv[test_retry_arg++], EXIM_EMAILADDR_MAX, "-brt");
4524 /* If the first argument contains no @ and no . it might be a local user
4525 or it might be a single-component name. Treat as a domain. */
4527 if (Ustrchr(s1, '@') == NULL && Ustrchr(s1, '.') == NULL)
4529 printf("Warning: \"%s\" contains no '@' and no '.' characters. It is "
4530 "being \ntreated as a one-component domain, not as a local part.\n\n",
4534 /* There may be an optional second domain arg. */
4536 if (test_retry_arg < argc && Ustrchr(argv[test_retry_arg], '.') != NULL)
4537 s2 = exim_str_fail_toolong(argv[test_retry_arg++], EXIM_DOMAINNAME_MAX, "-brt 2nd");
4539 /* The final arg is an error name */
4541 if (test_retry_arg < argc)
4543 const uschar *ss = exim_str_fail_toolong(argv[test_retry_arg], EXIM_DRIVERNAME_MAX, "-brt 3rd");
4545 readconf_retry_error(ss, ss + Ustrlen(ss), &basic_errno, &more_errno);
4548 printf("%s\n", CS error);
4549 return EXIT_FAILURE;
4552 /* For the {MAIL,RCPT,DATA}_4xx errors, a value of 255 means "any", and a
4553 code > 100 as an error is for matching codes to the decade. Turn them into
4554 a real error code, off the decade. */
4556 if (basic_errno == ERRNO_MAIL4XX ||
4557 basic_errno == ERRNO_RCPT4XX ||
4558 basic_errno == ERRNO_DATA4XX)
4560 int code = (more_errno >> 8) & 255;
4562 more_errno = (more_errno & 0xffff00ff) | (21 << 8);
4563 else if (code > 100)
4564 more_errno = (more_errno & 0xffff00ff) | ((code - 96) << 8);
4568 if (!(yield = retry_find_config(s1, s2, basic_errno, more_errno)))
4569 printf("No retry information found\n");
4572 more_errno = yield->more_errno;
4573 printf("Retry rule: %s ", yield->pattern);
4575 if (yield->basic_errno == ERRNO_EXIMQUOTA)
4577 printf("quota%s%s ",
4578 (more_errno > 0)? "_" : "",
4579 (more_errno > 0)? readconf_printtime(more_errno) : US"");
4581 else if (yield->basic_errno == ECONNREFUSED)
4583 printf("refused%s%s ",
4584 (more_errno > 0)? "_" : "",
4585 (more_errno == 'M')? "MX" :
4586 (more_errno == 'A')? "A" : "");
4588 else if (yield->basic_errno == ETIMEDOUT)
4591 if ((more_errno & RTEF_CTOUT) != 0) printf("_connect");
4593 if (more_errno != 0) printf("_%s",
4594 (more_errno == 'M')? "MX" : "A");
4597 else if (yield->basic_errno == ERRNO_AUTHFAIL)
4598 printf("auth_failed ");
4601 for (retry_rule * r = yield->rules; r; r = r->next)
4603 printf("%c,%s", r->rule, readconf_printtime(r->timeout)); /* Do not */
4604 printf(",%s", readconf_printtime(r->p1)); /* amalgamate */
4610 printf(",%d.", x/1000);
4624 exim_exit(EXIT_SUCCESS);
4627 /* Handle a request to list one or more configuration options */
4628 /* If -n was set, we suppress some information */
4633 set_process_info("listing variables");
4634 if (recipients_arg >= argc)
4635 fail = !readconf_print(US"all", NULL, flag_n);
4636 else for (i = recipients_arg; i < argc; i++)
4639 (Ustrcmp(argv[i], "router") == 0 ||
4640 Ustrcmp(argv[i], "transport") == 0 ||
4641 Ustrcmp(argv[i], "authenticator") == 0 ||
4642 Ustrcmp(argv[i], "macro") == 0 ||
4643 Ustrcmp(argv[i], "environment") == 0))
4645 fail |= !readconf_print(exim_str_fail_toolong(argv[i+1], EXIM_DRIVERNAME_MAX, "-bP name"), argv[i], flag_n);
4649 fail = !readconf_print(exim_str_fail_toolong(argv[i], EXIM_DRIVERNAME_MAX, "-bP item"), NULL, flag_n);
4651 exim_exit(fail ? EXIT_FAILURE : EXIT_SUCCESS);
4656 set_process_info("listing config");
4657 exim_exit(readconf_print(US"config", NULL, flag_n)
4658 ? EXIT_SUCCESS : EXIT_FAILURE);
4662 /* Initialise subsystems as required. */
4666 /* Handle a request to deliver one or more messages that are already on the
4667 queue. Values of msg_action other than MSG_DELIVER and MSG_LOAD are dealt with
4668 above. MSG_LOAD is handled with -be (which is the only time it applies) below.
4670 Delivery of specific messages is typically used for a small number when
4671 prodding by hand (when the option forced_delivery will be set) or when
4672 re-execing to regain root privilege. Each message delivery must happen in a
4673 separate process, so we fork a process for each one, and run them sequentially
4674 so that debugging output doesn't get intertwined, and to avoid spawning too
4675 many processes if a long list is given. However, don't fork for the last one;
4676 this saves a process in the common case when Exim is called to deliver just one
4679 if (msg_action_arg > 0 && msg_action != MSG_LOAD)
4681 if (prod_requires_admin && !f.admin_user)
4683 fprintf(stderr, "exim: Permission denied\n");
4684 exim_exit(EXIT_FAILURE);
4686 set_process_info("delivering specified messages");
4687 if (deliver_give_up) forced_delivery = f.deliver_force_thaw = TRUE;
4688 for (i = msg_action_arg; i < argc; i++)
4692 /*XXX This use of argv[i] for msg_id should really be tainted, but doing
4693 that runs into a later copy into the untainted global message_id[] */
4694 /*XXX Do we need a length limit check here? */
4696 (void)deliver_message(argv[i], forced_delivery, deliver_give_up);
4697 else if ((pid = exim_fork(US"cmdline-delivery")) == 0)
4699 (void)deliver_message(argv[i], forced_delivery, deliver_give_up);
4700 exim_underbar_exit(EXIT_SUCCESS);
4704 fprintf(stderr, "failed to fork delivery process for %s: %s\n", argv[i],
4706 exim_exit(EXIT_FAILURE);
4710 exim_exit(EXIT_SUCCESS);
4714 /* If only a single queue run is requested, without SMTP listening, we can just
4715 turn into a queue runner, with an optional starting message id. */
4717 if (queue_interval == 0 && !f.daemon_listen)
4719 DEBUG(D_queue_run) debug_printf("Single queue run%s%s%s%s\n",
4720 start_queue_run_id ? US" starting at " : US"",
4721 start_queue_run_id ? start_queue_run_id: US"",
4722 stop_queue_run_id ? US" stopping at " : US"",
4723 stop_queue_run_id ? stop_queue_run_id : US"");
4725 set_process_info("running the '%s' queue (single queue run)", queue_name);
4727 set_process_info("running the queue (single queue run)");
4728 queue_run(start_queue_run_id, stop_queue_run_id, FALSE);
4729 exim_exit(EXIT_SUCCESS);
4733 /* Find the login name of the real user running this process. This is always
4734 needed when receiving a message, because it is written into the spool file. It
4735 may also be used to construct a from: or a sender: header, and in this case we
4736 need the user's full name as well, so save a copy of it, checked for RFC822
4737 syntax and munged if necessary, if it hasn't previously been set by the -F
4738 argument. We may try to get the passwd entry more than once, in case NIS or
4739 other delays are in evidence. Save the home directory for use in filter testing
4744 if ((pw = getpwuid(real_uid)) != NULL)
4746 originator_login = string_copy(US pw->pw_name);
4747 originator_home = string_copy(US pw->pw_dir);
4749 /* If user name has not been set by -F, set it from the passwd entry
4750 unless -f has been used to set the sender address by a trusted user. */
4752 if (!originator_name)
4754 if (!sender_address || (!f.trusted_caller && filter_test == FTEST_NONE))
4756 uschar *name = US pw->pw_gecos;
4757 uschar *amp = Ustrchr(name, '&');
4760 /* Most Unix specify that a '&' character in the gecos field is
4761 replaced by a copy of the login name, and some even specify that
4762 the first character should be upper cased, so that's what we do. */
4767 string_format(buffer, sizeof(buffer), "%.*s%n%s%s",
4768 (int)(amp - name), name, &loffset, originator_login, amp + 1);
4769 buffer[loffset] = toupper(buffer[loffset]);
4773 /* If a pattern for matching the gecos field was supplied, apply
4774 it and then expand the name string. */
4776 if (gecos_pattern && gecos_name)
4779 re = regex_must_compile(gecos_pattern, FALSE, TRUE); /* Use malloc */
4781 if (regex_match_and_setup(re, name, 0, -1))
4783 uschar *new_name = expand_string(gecos_name);
4787 DEBUG(D_receive) debug_printf("user name \"%s\" extracted from "
4788 "gecos field \"%s\"\n", new_name, name);
4791 else DEBUG(D_receive) debug_printf("failed to expand gecos_name string "
4792 "\"%s\": %s\n", gecos_name, expand_string_message);
4794 else DEBUG(D_receive) debug_printf("gecos_pattern \"%s\" did not match "
4795 "gecos field \"%s\"\n", gecos_pattern, name);
4796 store_free((void *)re);
4798 originator_name = string_copy(name);
4801 /* A trusted caller has used -f but not -F */
4803 else originator_name = US"";
4806 /* Break the retry loop */
4811 if (++i > finduser_retries) break;
4815 /* If we cannot get a user login, log the incident and give up, unless the
4816 configuration specifies something to use. When running in the test harness,
4817 any setting of unknown_login overrides the actual name. */
4819 if (originator_login == NULL || f.running_in_test_harness)
4821 if (unknown_login != NULL)
4823 originator_login = expand_string(unknown_login);
4824 if (originator_name == NULL && unknown_username != NULL)
4825 originator_name = expand_string(unknown_username);
4826 if (originator_name == NULL) originator_name = US"";
4828 if (originator_login == NULL)
4829 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Failed to get user name for uid %d",
4833 /* Ensure that the user name is in a suitable form for use as a "phrase" in an
4836 originator_name = parse_fix_phrase(originator_name, Ustrlen(originator_name));
4838 /* If a message is created by this call of Exim, the uid/gid of its originator
4839 are those of the caller. These values are overridden if an existing message is
4840 read in from the spool. */
4842 originator_uid = real_uid;
4843 originator_gid = real_gid;
4845 DEBUG(D_receive) debug_printf("originator: uid=%d gid=%d login=%s name=%s\n",
4846 (int)originator_uid, (int)originator_gid, originator_login, originator_name);
4848 /* Run in daemon and/or queue-running mode. The function daemon_go() never
4849 returns. We leave this till here so that the originator_ fields are available
4850 for incoming messages via the daemon. The daemon cannot be run in mua_wrapper
4853 if (f.daemon_listen || f.inetd_wait_mode || queue_interval > 0)
4857 fprintf(stderr, "Daemon cannot be run when mua_wrapper is set\n");
4858 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Daemon cannot be run when "
4859 "mua_wrapper is set");
4862 # ifndef DISABLE_TLS
4863 /* This also checks that the library linkage is working and we can call
4864 routines in it, so call even if tls_require_ciphers is unset */
4866 # ifdef MEASURE_TIMING
4867 struct timeval t0, diff;
4868 (void)gettimeofday(&t0, NULL);
4870 if (!tls_dropprivs_validate_require_cipher(FALSE))
4872 # ifdef MEASURE_TIMING
4873 report_time_since(&t0, US"validate_ciphers (delta)");
4881 /* If the sender ident has not been set (by a trusted caller) set it to
4882 the caller. This will get overwritten below for an inetd call. If a trusted
4883 caller has set it empty, unset it. */
4885 if (!sender_ident) sender_ident = originator_login;
4886 else if (!*sender_ident) sender_ident = NULL;
4888 /* Handle the -brw option, which is for checking out rewriting rules. Cause log
4889 writes (on errors) to go to stderr instead. Can't do this earlier, as want the
4890 originator_* variables set. */
4892 if (test_rewrite_arg >= 0)
4894 f.really_exim = FALSE;
4895 if (test_rewrite_arg >= argc)
4897 printf("-brw needs an address argument\n");
4898 exim_exit(EXIT_FAILURE);
4900 rewrite_test(exim_str_fail_toolong(argv[test_rewrite_arg], EXIM_EMAILADDR_MAX, "-brw"));
4901 exim_exit(EXIT_SUCCESS);
4904 /* A locally-supplied message is considered to be coming from a local user
4905 unless a trusted caller supplies a sender address with -f, or is passing in the
4906 message via SMTP (inetd invocation or otherwise). */
4908 if ( !sender_address && !smtp_input
4909 || !f.trusted_caller && filter_test == FTEST_NONE)
4911 f.sender_local = TRUE;
4913 /* A trusted caller can supply authenticated_sender and authenticated_id
4914 via -oMas and -oMai and if so, they will already be set. Otherwise, force
4915 defaults except when host checking. */
4917 if (!authenticated_sender && !host_checking)
4918 authenticated_sender = string_sprintf("%s@%s", originator_login,
4919 qualify_domain_sender);
4920 if (!authenticated_id && !host_checking)
4921 authenticated_id = originator_login;
4924 /* Trusted callers are always permitted to specify the sender address.
4925 Untrusted callers may specify it if it matches untrusted_set_sender, or if what
4926 is specified is the empty address. However, if a trusted caller does not
4927 specify a sender address for SMTP input, we leave sender_address unset. This
4928 causes the MAIL commands to be honoured. */
4930 if ( !smtp_input && !sender_address
4931 || !receive_check_set_sender(sender_address))
4933 /* Either the caller is not permitted to set a general sender, or this is
4934 non-SMTP input and the trusted caller has not set a sender. If there is no
4935 sender, or if a sender other than <> is set, override with the originator's
4936 login (which will get qualified below), except when checking things. */
4938 if (sender_address == NULL /* No sender_address set */
4940 (sender_address[0] != 0 && /* Non-empty sender address, AND */
4941 !checking)) /* Not running tests, including filter tests */
4943 sender_address = originator_login;
4944 f.sender_address_forced = FALSE;
4945 sender_address_domain = 0;
4949 /* Remember whether an untrusted caller set the sender address */
4951 f.sender_set_untrusted = sender_address != originator_login && !f.trusted_caller;
4953 /* Ensure that the sender address is fully qualified unless it is the empty
4954 address, which indicates an error message, or doesn't exist (root caller, smtp
4955 interface, no -f argument). */
4957 if (sender_address && *sender_address && sender_address_domain == 0)
4958 sender_address = string_sprintf("%s@%s", local_part_quote(sender_address),
4959 qualify_domain_sender);
4961 DEBUG(D_receive) debug_printf("sender address = %s\n", sender_address);
4963 /* Handle a request to verify a list of addresses, or test them for delivery.
4964 This must follow the setting of the sender address, since routers can be
4965 predicated upon the sender. If no arguments are given, read addresses from
4966 stdin. Set debug_level to at least D_v to get full output for address testing.
4969 if (verify_address_mode || f.address_test_mode)
4972 int flags = vopt_qualify;
4974 if (verify_address_mode)
4976 if (!verify_as_sender) flags |= vopt_is_recipient;
4977 DEBUG(D_verify) debug_print_ids(US"Verifying:");
4982 flags |= vopt_is_recipient;
4983 debug_selector |= D_v;
4984 debug_file = stderr;
4985 debug_fd = fileno(debug_file);
4986 DEBUG(D_verify) debug_print_ids(US"Address testing:");
4989 if (recipients_arg < argc)
4991 while (recipients_arg < argc)
4993 /* Supplied addresses are tainted since they come from a user */
4994 uschar * s = string_copy_taint(exim_str_fail_toolong(argv[recipients_arg++], EXIM_DISPLAYMAIL_MAX, "address verification"), TRUE);
4997 BOOL finished = FALSE;
4998 uschar *ss = parse_find_address_end(s, FALSE);
4999 if (*ss == ',') *ss = 0; else finished = TRUE;
5000 test_address(s, flags, &exit_value);
5003 while (*++s == ',' || isspace(*s)) ;
5010 uschar * s = get_stdinput(NULL, NULL);
5012 test_address(string_copy_taint(exim_str_fail_toolong(s, EXIM_DISPLAYMAIL_MAX, "address verification (stdin)"), TRUE), flags, &exit_value);
5016 exim_exit(exit_value);
5019 /* Handle expansion checking. Either expand items on the command line, or read
5020 from stdin if there aren't any. If -Mset was specified, load the message so
5021 that its variables can be used, but restrict this facility to admin users.
5022 Otherwise, if -bem was used, read a message from stdin. */
5026 dns_init(FALSE, FALSE, FALSE);
5027 if (msg_action_arg > 0 && msg_action == MSG_LOAD)
5031 exim_fail("exim: permission denied\n");
5032 message_id = US exim_str_fail_toolong(argv[msg_action_arg], MESSAGE_ID_LENGTH, "message-id");
5033 /* Checking the length of the ID is sufficient to validate it.
5034 Get an untainted version so file opens can be done. */
5035 message_id = string_copy_taint(message_id, FALSE);
5037 spoolname = string_sprintf("%s-H", message_id);
5038 if ((deliver_datafile = spool_open_datafile(message_id)) < 0)
5039 printf ("Failed to load message datafile %s\n", message_id);
5040 if (spool_read_header(spoolname, TRUE, FALSE) != spool_read_OK)
5041 printf ("Failed to load message %s\n", message_id);
5044 /* Read a test message from a file. We fudge it up to be on stdin, saving
5045 stdin itself for later reading of expansion strings. */
5047 else if (expansion_test_message)
5049 int save_stdin = dup(0);
5050 int fd = Uopen(expansion_test_message, O_RDONLY, 0);
5052 exim_fail("exim: failed to open %s: %s\n", expansion_test_message,
5055 filter_test = FTEST_USER; /* Fudge to make it look like filter test */
5056 message_ended = END_NOTENDED;
5057 read_message_body(receive_msg(extract_recipients));
5058 message_linecount += body_linecount;
5059 (void)dup2(save_stdin, 0);
5060 (void)close(save_stdin);
5061 clearerr(stdin); /* Required by Darwin */
5064 /* Only admin users may see config-file macros this way */
5066 if (!f.admin_user) macros_user = macros = mlast = NULL;
5068 /* Allow $recipients for this testing */
5070 f.enable_dollar_recipients = TRUE;
5072 /* Expand command line items */
5074 if (recipients_arg < argc)
5075 while (recipients_arg < argc)
5076 expansion_test_line(exim_str_fail_toolong(argv[recipients_arg++], EXIM_EMAILADDR_MAX, "recipient"));
5082 char *(*fn_readline)(const char *) = NULL;
5083 void (*fn_addhist)(const char *) = NULL;
5087 void *dlhandle = set_readline(&fn_readline, &fn_addhist);
5090 while (s = get_stdinput(fn_readline, fn_addhist))
5091 expansion_test_line(s);
5094 if (dlhandle) dlclose(dlhandle);
5098 /* The data file will be open after -Mset */
5100 if (deliver_datafile >= 0)
5102 (void)close(deliver_datafile);
5103 deliver_datafile = -1;
5106 exim_exit(EXIT_SUCCESS);
5110 /* The active host name is normally the primary host name, but it can be varied
5111 for hosts that want to play several parts at once. We need to ensure that it is
5112 set for host checking, and for receiving messages. */
5114 smtp_active_hostname = primary_hostname;
5115 if (raw_active_hostname != NULL)
5117 uschar *nah = expand_string(raw_active_hostname);
5120 if (!f.expand_string_forcedfail)
5121 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to expand \"%s\" "
5122 "(smtp_active_hostname): %s", raw_active_hostname,
5123 expand_string_message);
5125 else if (nah[0] != 0) smtp_active_hostname = nah;
5128 /* Handle host checking: this facility mocks up an incoming SMTP call from a
5129 given IP address so that the blocking and relay configuration can be tested.
5130 Unless a sender_ident was set by -oMt, we discard it (the default is the
5131 caller's login name). An RFC 1413 call is made only if we are running in the
5132 test harness and an incoming interface and both ports are specified, because
5133 there is no TCP/IP call to find the ident for. */
5140 if (!sender_ident_set)
5142 sender_ident = NULL;
5143 if (f.running_in_test_harness && sender_host_port
5144 && interface_address && interface_port)
5145 verify_get_ident(1223); /* note hardwired port number */
5148 /* In case the given address is a non-canonical IPv6 address, canonicalize
5149 it. The code works for both IPv4 and IPv6, as it happens. */
5151 size = host_aton(sender_host_address, x);
5152 sender_host_address = store_get(48, FALSE); /* large enough for full IPv6 */
5153 (void)host_nmtoa(size, x, -1, sender_host_address, ':');
5155 /* Now set up for testing */
5157 host_build_sender_fullhost();
5161 f.sender_local = FALSE;
5162 f.sender_host_notsocket = TRUE;
5163 debug_file = stderr;
5164 debug_fd = fileno(debug_file);
5165 fprintf(stdout, "\n**** SMTP testing session as if from host %s\n"
5166 "**** but without any ident (RFC 1413) callback.\n"
5167 "**** This is not for real!\n\n",
5168 sender_host_address);
5170 memset(sender_host_cache, 0, sizeof(sender_host_cache));
5171 if (verify_check_host(&hosts_connection_nolog) == OK)
5172 BIT_CLEAR(log_selector, log_selector_size, Li_smtp_connection);
5173 log_write(L_smtp_connection, LOG_MAIN, "%s", smtp_get_connection_info());
5175 /* NOTE: We do *not* call smtp_log_no_mail() if smtp_start_session() fails,
5176 because a log line has already been written for all its failure exists
5177 (usually "connection refused: <reason>") and writing another one is
5178 unnecessary clutter. */
5180 if (smtp_start_session())
5183 for (; (reset_point = store_mark()); store_reset(reset_point))
5185 if (smtp_setup_msg() <= 0) break;
5186 if (!receive_msg(FALSE)) break;
5188 return_path = sender_address = NULL;
5189 dnslist_domain = dnslist_matched = NULL;
5190 #ifndef DISABLE_DKIM
5191 dkim_cur_signer = NULL;
5194 deliver_localpart_orig = NULL;
5195 deliver_domain_orig = NULL;
5196 callout_address = sending_ip_address = NULL;
5197 deliver_localpart_data = deliver_domain_data =
5198 recipient_data = sender_data = NULL;
5199 sender_rate = sender_rate_limit = sender_rate_period = NULL;
5203 exim_exit(EXIT_SUCCESS);
5207 /* Arrange for message reception if recipients or SMTP were specified;
5208 otherwise complain unless a version print (-bV) happened or this is a filter
5209 verification test or info dump.
5210 In the former case, show the configuration file name. */
5212 if (recipients_arg >= argc && !extract_recipients && !smtp_input)
5214 if (version_printed)
5216 if (Ustrchr(config_main_filelist, ':'))
5217 printf("Configuration file search path is %s\n", config_main_filelist);
5218 printf("Configuration file is %s\n", config_main_filename);
5219 return EXIT_SUCCESS;
5222 if (info_flag != CMDINFO_NONE)
5224 show_exim_information(info_flag, info_stdout ? stdout : stderr);
5225 return info_stdout ? EXIT_SUCCESS : EXIT_FAILURE;
5228 if (filter_test == FTEST_NONE)
5229 exim_usage(called_as);
5233 /* If mua_wrapper is set, Exim is being used to turn an MUA that submits on the
5234 standard input into an MUA that submits to a smarthost over TCP/IP. We know
5235 that we are not called from inetd, because that is rejected above. The
5236 following configuration settings are forced here:
5238 (1) Synchronous delivery (-odi)
5239 (2) Errors to stderr (-oep == -oeq)
5240 (3) No parallel remote delivery
5241 (4) Unprivileged delivery
5243 We don't force overall queueing options because there are several of them;
5244 instead, queueing is avoided below when mua_wrapper is set. However, we do need
5245 to override any SMTP queueing. */
5249 f.synchronous_delivery = TRUE;
5250 arg_error_handling = ERRORS_STDERR;
5251 remote_max_parallel = 1;
5252 deliver_drop_privilege = TRUE;
5253 f.queue_smtp = FALSE;
5254 queue_smtp_domains = NULL;
5256 message_utf8_downconvert = -1; /* convert-if-needed */
5261 /* Prepare to accept one or more new messages on the standard input. When a
5262 message has been read, its id is returned in message_id[]. If doing immediate
5263 delivery, we fork a delivery process for each received message, except for the
5264 last one, where we can save a process switch.
5266 It is only in non-smtp mode that error_handling is allowed to be changed from
5267 its default of ERRORS_SENDER by argument. (Idle thought: are any of the
5268 sendmail error modes other than -oem ever actually used? Later: yes.) */
5270 if (!smtp_input) error_handling = arg_error_handling;
5272 /* If this is an inetd call, ensure that stderr is closed to prevent panic
5273 logging being sent down the socket and make an identd call to get the
5276 else if (f.is_inetd)
5278 (void)fclose(stderr);
5279 exim_nullstd(); /* Re-open to /dev/null */
5280 verify_get_ident(IDENT_PORT);
5281 host_build_sender_fullhost();
5282 set_process_info("handling incoming connection from %s via inetd",
5286 /* If the sender host address has been set, build sender_fullhost if it hasn't
5287 already been done (which it will have been for inetd). This caters for the
5288 case when it is forced by -oMa. However, we must flag that it isn't a socket,
5289 so that the test for IP options is skipped for -bs input. */
5291 if (sender_host_address && !sender_fullhost)
5293 host_build_sender_fullhost();
5294 set_process_info("handling incoming connection from %s via -oMa",
5296 f.sender_host_notsocket = TRUE;
5299 /* Otherwise, set the sender host as unknown except for inetd calls. This
5300 prevents host checking in the case of -bs not from inetd and also for -bS. */
5302 else if (!f.is_inetd) f.sender_host_unknown = TRUE;
5304 /* If stdout does not exist, then dup stdin to stdout. This can happen
5305 if exim is started from inetd. In this case fd 0 will be set to the socket,
5306 but fd 1 will not be set. This also happens for passed SMTP channels. */
5308 if (fstat(1, &statbuf) < 0) (void)dup2(0, 1);
5310 /* Set up the incoming protocol name and the state of the program. Root is
5311 allowed to force received protocol via the -oMr option above. If we have come
5312 via inetd, the process info has already been set up. We don't set
5313 received_protocol here for smtp input, as it varies according to
5314 batch/HELO/EHLO/AUTH/TLS. */
5318 if (!f.is_inetd) set_process_info("accepting a local %sSMTP message from <%s>",
5319 smtp_batched_input? "batched " : "",
5320 (sender_address!= NULL)? sender_address : originator_login);
5324 int old_pool = store_pool;
5325 store_pool = POOL_PERM;
5326 if (!received_protocol)
5327 received_protocol = string_sprintf("local%s", called_as);
5328 store_pool = old_pool;
5329 set_process_info("accepting a local non-SMTP message from <%s>",
5333 /* Initialize the session_local_queue-only flag (this will be ignored if
5334 mua_wrapper is set) */
5337 session_local_queue_only = queue_only;
5339 /* For non-SMTP and for batched SMTP input, check that there is enough space on
5340 the spool if so configured. On failure, we must not attempt to send an error
5341 message! (For interactive SMTP, the check happens at MAIL FROM and an SMTP
5342 error code is given.) */
5344 if ((!smtp_input || smtp_batched_input) && !receive_check_fs(0))
5345 exim_fail("exim: insufficient disk space\n");
5347 /* If this is smtp input of any kind, real or batched, handle the start of the
5350 NOTE: We do *not* call smtp_log_no_mail() if smtp_start_session() fails,
5351 because a log line has already been written for all its failure exists
5352 (usually "connection refused: <reason>") and writing another one is
5353 unnecessary clutter. */
5359 memset(sender_host_cache, 0, sizeof(sender_host_cache));
5360 if (verify_check_host(&hosts_connection_nolog) == OK)
5361 BIT_CLEAR(log_selector, log_selector_size, Li_smtp_connection);
5362 log_write(L_smtp_connection, LOG_MAIN, "%s", smtp_get_connection_info());
5363 if (!smtp_start_session())
5366 exim_exit(EXIT_SUCCESS);
5370 /* Otherwise, set up the input size limit here. */
5374 thismessage_size_limit = expand_string_integer(message_size_limit, TRUE);
5375 if (expand_string_message)
5376 if (thismessage_size_limit == -1)
5377 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to expand "
5378 "message_size_limit: %s", expand_string_message);
5380 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "invalid value for "
5381 "message_size_limit: %s", expand_string_message);
5384 /* Loop for several messages when reading SMTP input. If we fork any child
5385 processes, we don't want to wait for them unless synchronous delivery is
5386 requested, so set SIGCHLD to SIG_IGN in that case. This is not necessarily the
5387 same as SIG_DFL, despite the fact that documentation often lists the default as
5388 "ignore". This is a confusing area. This is what I know:
5390 At least on some systems (e.g. Solaris), just setting SIG_IGN causes child
5391 processes that complete simply to go away without ever becoming defunct. You
5392 can't then wait for them - but we don't want to wait for them in the
5393 non-synchronous delivery case. However, this behaviour of SIG_IGN doesn't
5394 happen for all OS (e.g. *BSD is different).
5396 But that's not the end of the story. Some (many? all?) systems have the
5397 SA_NOCLDWAIT option for sigaction(). This requests the behaviour that Solaris
5398 has by default, so it seems that the difference is merely one of default
5399 (compare restarting vs non-restarting signals).
5401 To cover all cases, Exim sets SIG_IGN with SA_NOCLDWAIT here if it can. If not,
5402 it just sets SIG_IGN. To be on the safe side it also calls waitpid() at the end
5403 of the loop below. Paranoia rules.
5405 February 2003: That's *still* not the end of the story. There are now versions
5406 of Linux (where SIG_IGN does work) that are picky. If, having set SIG_IGN, a
5407 process then calls waitpid(), a grumble is written to the system log, because
5408 this is logically inconsistent. In other words, it doesn't like the paranoia.
5409 As a consequence of this, the waitpid() below is now excluded if we are sure
5410 that SIG_IGN works. */
5412 if (!f.synchronous_delivery)
5415 struct sigaction act;
5416 act.sa_handler = SIG_IGN;
5417 sigemptyset(&(act.sa_mask));
5418 act.sa_flags = SA_NOCLDWAIT;
5419 sigaction(SIGCHLD, &act, NULL);
5421 signal(SIGCHLD, SIG_IGN);
5425 /* Save the current store pool point, for resetting at the start of
5426 each message, and save the real sender address, if any. */
5428 real_sender_address = sender_address;
5430 /* Loop to receive messages; receive_msg() returns TRUE if there are more
5431 messages to be read (SMTP input), or FALSE otherwise (not SMTP, or SMTP channel
5436 rmark reset_point = store_mark();
5439 /* Handle the SMTP case; call smtp_setup_mst() to deal with the initial SMTP
5440 input and build the recipients list, before calling receive_msg() to read the
5441 message proper. Whatever sender address is given in the SMTP transaction is
5442 often ignored for local senders - we use the actual sender, which is normally
5443 either the underlying user running this process or a -f argument provided by
5444 a trusted caller. It is saved in real_sender_address. The test for whether to
5445 accept the SMTP sender is encapsulated in receive_check_set_sender(). */
5450 if ((rc = smtp_setup_msg()) > 0)
5452 if (real_sender_address != NULL &&
5453 !receive_check_set_sender(sender_address))
5455 sender_address = raw_sender = real_sender_address;
5456 sender_address_unrewritten = NULL;
5459 /* For batched SMTP, we have to run the acl_not_smtp_start ACL, since it
5460 isn't really SMTP, so no other ACL will run until the acl_not_smtp one at
5461 the very end. The result of the ACL is ignored (as for other non-SMTP
5462 messages). It is run for its potential side effects. */
5464 if (smtp_batched_input && acl_not_smtp_start != NULL)
5466 uschar *user_msg, *log_msg;
5467 f.enable_dollar_recipients = TRUE;
5468 (void)acl_check(ACL_WHERE_NOTSMTP_START, NULL, acl_not_smtp_start,
5469 &user_msg, &log_msg);
5470 f.enable_dollar_recipients = FALSE;
5473 /* Now get the data for the message */
5475 more = receive_msg(extract_recipients);
5476 if (message_id[0] == 0)
5478 cancel_cutthrough_connection(TRUE, US"receive dropped");
5479 if (more) goto moreloop;
5480 smtp_log_no_mail(); /* Log no mail if configured */
5481 exim_exit(EXIT_FAILURE);
5486 cancel_cutthrough_connection(TRUE, US"message setup dropped");
5487 smtp_log_no_mail(); /* Log no mail if configured */
5488 exim_exit(rc ? EXIT_FAILURE : EXIT_SUCCESS);
5492 /* In the non-SMTP case, we have all the information from the command
5493 line, but must process it in case it is in the more general RFC822
5494 format, and in any case, to detect syntax errors. Also, it appears that
5495 the use of comma-separated lists as single arguments is common, so we
5496 had better support them. */
5501 int count = argc - recipients_arg;
5502 uschar **list = argv + recipients_arg;
5504 /* These options cannot be changed dynamically for non-SMTP messages */
5506 f.active_local_sender_retain = local_sender_retain;
5507 f.active_local_from_check = local_from_check;
5509 /* Save before any rewriting */
5511 raw_sender = string_copy(sender_address);
5513 /* Loop for each argument (supplied by user hence tainted) */
5515 for (int i = 0; i < count; i++)
5517 int start, end, domain;
5519 /* There can be multiple addresses, so EXIM_DISPLAYMAIL_MAX (tuned for 1) is too short.
5520 * We'll still want to cap it to something, just in case. */
5521 uschar * s = string_copy_taint(exim_str_fail_toolong(list[i], BIG_BUFFER_SIZE, "address argument"), TRUE);
5523 /* Loop for each comma-separated address */
5527 BOOL finished = FALSE;
5529 uschar *ss = parse_find_address_end(s, FALSE);
5531 if (*ss == ',') *ss = 0; else finished = TRUE;
5533 /* Check max recipients - if -t was used, these aren't recipients */
5535 if (recipients_max > 0 && ++rcount > recipients_max &&
5536 !extract_recipients)
5537 if (error_handling == ERRORS_STDERR)
5539 fprintf(stderr, "exim: too many recipients\n");
5540 exim_exit(EXIT_FAILURE);
5544 moan_to_sender(ERRMESS_TOOMANYRECIP, NULL, NULL, stdin, TRUE)?
5545 errors_sender_rc : EXIT_FAILURE;
5549 BOOL b = allow_utf8_domains;
5550 allow_utf8_domains = TRUE;
5553 parse_extract_address(s, &errmess, &start, &end, &domain, FALSE);
5556 if (string_is_utf8(recipient))
5557 message_smtputf8 = TRUE;
5559 allow_utf8_domains = b;
5562 if (domain == 0 && !f.allow_unqualified_recipient)
5565 errmess = US"unqualified recipient address not allowed";
5569 if (error_handling == ERRORS_STDERR)
5571 fprintf(stderr, "exim: bad recipient address \"%s\": %s\n",
5572 string_printing(list[i]), errmess);
5573 exim_exit(EXIT_FAILURE);
5579 eblock.text1 = string_printing(list[i]);
5580 eblock.text2 = errmess;
5582 moan_to_sender(ERRMESS_BADARGADDRESS, &eblock, NULL, stdin, TRUE)?
5583 errors_sender_rc : EXIT_FAILURE;
5586 receive_add_recipient(string_copy_taint(recipient, TRUE), -1);
5589 while (*(++s) != 0 && (*s == ',' || isspace(*s)));
5593 /* Show the recipients when debugging */
5597 if (sender_address) debug_printf("Sender: %s\n", sender_address);
5598 if (recipients_list)
5600 debug_printf("Recipients:\n");
5601 for (int i = 0; i < recipients_count; i++)
5602 debug_printf(" %s\n", recipients_list[i].address);
5606 /* Run the acl_not_smtp_start ACL if required. The result of the ACL is
5607 ignored; rejecting here would just add complication, and it can just as
5608 well be done later. Allow $recipients to be visible in the ACL. */
5610 if (acl_not_smtp_start)
5612 uschar *user_msg, *log_msg;
5613 f.enable_dollar_recipients = TRUE;
5614 (void)acl_check(ACL_WHERE_NOTSMTP_START, NULL, acl_not_smtp_start,
5615 &user_msg, &log_msg);
5616 f.enable_dollar_recipients = FALSE;
5619 /* Pause for a while waiting for input. If none received in that time,
5620 close the logfile, if we had one open; then if we wait for a long-running
5621 datasource (months, in one use-case) log rotation will not leave us holding
5624 if (!receive_timeout)
5626 struct timeval t = { .tv_sec = 30*60, .tv_usec = 0 }; /* 30 minutes */
5629 FD_ZERO(&r); FD_SET(0, &r);
5630 if (select(1, &r, NULL, NULL, &t) == 0) mainlog_close();
5633 /* Read the data for the message. If filter_test is not FTEST_NONE, this
5634 will just read the headers for the message, and not write anything onto the
5637 message_ended = END_NOTENDED;
5638 more = receive_msg(extract_recipients);
5640 /* more is always FALSE here (not SMTP message) when reading a message
5641 for real; when reading the headers of a message for filter testing,
5642 it is TRUE if the headers were terminated by '.' and FALSE otherwise. */
5644 if (message_id[0] == 0) exim_exit(EXIT_FAILURE);
5645 } /* Non-SMTP message reception */
5647 /* If this is a filter testing run, there are headers in store, but
5648 no message on the spool. Run the filtering code in testing mode, setting
5649 the domain to the qualify domain and the local part to the current user,
5650 unless they have been set by options. The prefix and suffix are left unset
5651 unless specified. The the return path is set to to the sender unless it has
5652 already been set from a return-path header in the message. */
5654 if (filter_test != FTEST_NONE)
5656 deliver_domain = ftest_domain ? ftest_domain : qualify_domain_recipient;
5657 deliver_domain_orig = deliver_domain;
5658 deliver_localpart = ftest_localpart ? US ftest_localpart : originator_login;
5659 deliver_localpart_orig = deliver_localpart;
5660 deliver_localpart_prefix = US ftest_prefix;
5661 deliver_localpart_suffix = US ftest_suffix;
5662 deliver_home = originator_home;
5666 printf("Return-path copied from sender\n");
5667 return_path = string_copy(sender_address);
5670 printf("Return-path = %s\n", (return_path[0] == 0)? US"<>" : return_path);
5671 printf("Sender = %s\n", (sender_address[0] == 0)? US"<>" : sender_address);
5673 receive_add_recipient(
5674 string_sprintf("%s%s%s@%s",
5675 ftest_prefix ? ftest_prefix : US"",
5677 ftest_suffix ? ftest_suffix : US"",
5678 deliver_domain), -1);
5680 printf("Recipient = %s\n", recipients_list[0].address);
5681 if (ftest_prefix) printf("Prefix = %s\n", ftest_prefix);
5682 if (ftest_suffix) printf("Suffix = %s\n", ftest_suffix);
5684 if (chdir("/")) /* Get away from wherever the user is running this from */
5686 DEBUG(D_receive) debug_printf("chdir(\"/\") failed\n");
5687 exim_exit(EXIT_FAILURE);
5690 /* Now we run either a system filter test, or a user filter test, or both.
5691 In the latter case, headers added by the system filter will persist and be
5692 available to the user filter. We need to copy the filter variables
5695 if (filter_test & FTEST_SYSTEM)
5696 if (!filter_runtest(filter_sfd, filter_test_sfile, TRUE, more))
5697 exim_exit(EXIT_FAILURE);
5699 memcpy(filter_sn, filter_n, sizeof(filter_sn));
5701 if (filter_test & FTEST_USER)
5702 if (!filter_runtest(filter_ufd, filter_test_ufile, FALSE, more))
5703 exim_exit(EXIT_FAILURE);
5705 exim_exit(EXIT_SUCCESS);
5708 /* Else act on the result of message reception. We should not get here unless
5709 message_id[0] is non-zero. If queue_only is set, session_local_queue_only
5710 will be TRUE. If it is not, check on the number of messages received in this
5713 if ( !session_local_queue_only
5714 && smtp_accept_queue_per_connection > 0
5715 && receive_messagecount > smtp_accept_queue_per_connection)
5717 session_local_queue_only = TRUE;
5718 queue_only_reason = 2;
5721 /* Initialize local_queue_only from session_local_queue_only. If it is false,
5722 and queue_only_load is set, check that the load average is below it. If it is
5723 not, set local_queue_only TRUE. If queue_only_load_latch is true (the
5724 default), we put the whole session into queue_only mode. It then remains this
5725 way for any subsequent messages on the same SMTP connection. This is a
5726 deliberate choice; even though the load average may fall, it doesn't seem
5727 right to deliver later messages on the same call when not delivering earlier
5728 ones. However, there are odd cases where this is not wanted, so this can be
5729 changed by setting queue_only_load_latch false. */
5731 if (!(local_queue_only = session_local_queue_only) && queue_only_load >= 0)
5732 if ((local_queue_only = (load_average = OS_GETLOADAVG()) > queue_only_load))
5734 queue_only_reason = 3;
5735 if (queue_only_load_latch) session_local_queue_only = TRUE;
5738 /* If running as an MUA wrapper, all queueing options and freezing options
5742 local_queue_only = f.queue_only_policy = f.deliver_freeze = FALSE;
5744 /* Log the queueing here, when it will get a message id attached, but
5745 not if queue_only is set (case 0). Case 1 doesn't happen here (too many
5748 if (local_queue_only)
5750 cancel_cutthrough_connection(TRUE, US"no delivery; queueing");
5751 switch(queue_only_reason)
5754 log_write(L_delay_delivery,
5755 LOG_MAIN, "no immediate delivery: more than %d messages "
5756 "received in one connection", smtp_accept_queue_per_connection);
5760 log_write(L_delay_delivery,
5761 LOG_MAIN, "no immediate delivery: load average %.2f",
5762 (double)load_average/1000.0);
5767 else if (f.queue_only_policy || f.deliver_freeze)
5768 cancel_cutthrough_connection(TRUE, US"no delivery; queueing");
5770 /* Else do the delivery unless the ACL or local_scan() called for queue only
5771 or froze the message. Always deliver in a separate process. A fork failure is
5772 not a disaster, as the delivery will eventually happen on a subsequent queue
5773 run. The search cache must be tidied before the fork, as the parent will
5774 do it before exiting. The child will trigger a lookup failure and
5775 thereby defer the delivery if it tries to use (for example) a cached ldap
5776 connection that the parent has called unbind on. */
5783 if ((pid = exim_fork(US"local-accept-delivery")) == 0)
5786 close_unwanted(); /* Close unwanted file descriptors and TLS */
5787 exim_nullstd(); /* Ensure std{in,out,err} exist */
5789 /* Re-exec Exim if we need to regain privilege (note: in mua_wrapper
5790 mode, deliver_drop_privilege is forced TRUE). */
5792 if (geteuid() != root_uid && !deliver_drop_privilege && !unprivileged)
5794 delivery_re_exec(CEE_EXEC_EXIT);
5795 /* Control does not return here. */
5798 /* No need to re-exec */
5800 rc = deliver_message(message_id, FALSE, FALSE);
5802 exim_underbar_exit(!mua_wrapper || rc == DELIVER_MUA_SUCCEEDED
5803 ? EXIT_SUCCESS : EXIT_FAILURE);
5808 cancel_cutthrough_connection(TRUE, US"delivery fork failed");
5809 log_write(0, LOG_MAIN|LOG_PANIC, "failed to fork automatic delivery "
5810 "process: %s", strerror(errno));
5814 release_cutthrough_connection(US"msg passed for delivery");
5816 /* In the parent, wait if synchronous delivery is required. This will
5817 always be the case in MUA wrapper mode. */
5819 if (f.synchronous_delivery)
5822 while (wait(&status) != pid);
5823 if ((status & 0x00ff) != 0)
5824 log_write(0, LOG_MAIN|LOG_PANIC,
5825 "process %d crashed with signal %d while delivering %s",
5826 (int)pid, status & 0x00ff, message_id);
5827 if (mua_wrapper && (status & 0xffff) != 0) exim_exit(EXIT_FAILURE);
5832 /* The loop will repeat if more is TRUE. If we do not know know that the OS
5833 automatically reaps children (see comments above the loop), clear away any
5834 finished subprocesses here, in case there are lots of messages coming in
5835 from the same source. */
5837 #ifndef SIG_IGN_WORKS
5838 while (waitpid(-1, NULL, WNOHANG) > 0);
5842 return_path = sender_address = NULL;
5843 authenticated_sender = NULL;
5844 deliver_localpart_orig = NULL;
5845 deliver_domain_orig = NULL;
5846 deliver_host = deliver_host_address = NULL;
5847 dnslist_domain = dnslist_matched = NULL;
5848 #ifdef WITH_CONTENT_SCAN
5849 malware_name = NULL;
5851 callout_address = NULL;
5852 sending_ip_address = NULL;
5853 deliver_localpart_data = deliver_domain_data =
5854 recipient_data = sender_data = NULL;
5856 for(int i = 0; i < REGEX_VARS; i++) regex_vars[i] = NULL;
5858 store_reset(reset_point);
5861 exim_exit(EXIT_SUCCESS); /* Never returns */
5862 return 0; /* To stop compiler warning */