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) {}
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)
283 os_non_restarting_signal(SIGALRM, sigalrm_handler);
288 /*************************************************
289 * Sleep for a fractional time interval *
290 *************************************************/
292 /* This function is called by millisleep() and exim_wait_tick() to wait for a
293 period of time that may include a fraction of a second. The coding is somewhat
294 tedious. We do not expect setitimer() ever to fail, but if it does, the process
295 will wait for ever, so we panic in this instance. (There was a case of this
296 when a bug in a function that calls milliwait() caused it to pass invalid data.
297 That's when I added the check. :-)
299 We assume it to be not worth sleeping for under 50us; this value will
300 require revisiting as hardware advances. This avoids the issue of
301 a zero-valued timer setting meaning "never fire".
303 Argument: an itimerval structure containing the interval
308 milliwait(struct itimerval *itval)
311 sigset_t old_sigmask;
312 int save_errno = errno;
314 if (itval->it_value.tv_usec < 50 && itval->it_value.tv_sec == 0)
316 (void)sigemptyset(&sigmask); /* Empty mask */
317 (void)sigaddset(&sigmask, SIGALRM); /* Add SIGALRM */
318 (void)sigprocmask(SIG_BLOCK, &sigmask, &old_sigmask); /* Block SIGALRM */
319 if (setitimer(ITIMER_REAL, itval, NULL) < 0) /* Start timer */
320 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
321 "setitimer() failed: %s", strerror(errno));
322 (void)sigfillset(&sigmask); /* All signals */
323 (void)sigdelset(&sigmask, SIGALRM); /* Remove SIGALRM */
324 (void)sigsuspend(&sigmask); /* Until SIGALRM */
325 (void)sigprocmask(SIG_SETMASK, &old_sigmask, NULL); /* Restore mask */
327 sigalrm_seen = FALSE;
333 /*************************************************
334 * Millisecond sleep function *
335 *************************************************/
337 /* The basic sleep() function has a granularity of 1 second, which is too rough
338 in some cases - for example, when using an increasing delay to slow down
341 Argument: number of millseconds
348 struct itimerval itval = {.it_interval = {.tv_sec = 0, .tv_usec = 0},
349 .it_value = {.tv_sec = msec/1000,
350 .tv_usec = (msec % 1000) * 1000}};
356 /*************************************************
357 * Compare microsecond times *
358 *************************************************/
365 Returns: -1, 0, or +1
369 exim_tvcmp(struct timeval *t1, struct timeval *t2)
371 if (t1->tv_sec > t2->tv_sec) return +1;
372 if (t1->tv_sec < t2->tv_sec) return -1;
373 if (t1->tv_usec > t2->tv_usec) return +1;
374 if (t1->tv_usec < t2->tv_usec) return -1;
381 /*************************************************
382 * Clock tick wait function *
383 *************************************************/
385 #ifdef _POSIX_MONOTONIC_CLOCK
386 # ifdef CLOCK_BOOTTIME
387 # define EXIM_CLOCKTYPE CLOCK_BOOTTIME
389 # define EXIM_CLOCKTYPE CLOCK_MONOTONIC
392 /* Amount EXIM_CLOCK is behind realtime, at startup. */
393 static struct timespec offset_ts;
396 exim_clock_init(void)
399 if (clock_gettime(EXIM_CLOCKTYPE, &offset_ts) != 0) return;
400 (void)gettimeofday(&tv, NULL);
401 offset_ts.tv_sec = tv.tv_sec - offset_ts.tv_sec;
402 offset_ts.tv_nsec = tv.tv_usec * 1000 - offset_ts.tv_nsec;
403 if (offset_ts.tv_nsec >= 0) return;
405 offset_ts.tv_nsec += 1000*1000*1000;
411 exim_gettime(struct timeval * tv)
413 #ifdef _POSIX_MONOTONIC_CLOCK
414 struct timespec now_ts;
416 if (clock_gettime(EXIM_CLOCKTYPE, &now_ts) == 0)
418 now_ts.tv_sec += offset_ts.tv_sec;
419 if ((now_ts.tv_nsec += offset_ts.tv_nsec) >= 1000*1000*1000)
422 now_ts.tv_nsec -= 1000*1000*1000;
424 tv->tv_sec = now_ts.tv_sec;
425 tv->tv_usec = now_ts.tv_nsec / 1000;
429 (void)gettimeofday(tv, NULL);
433 /* Exim uses a time + a pid to generate a unique identifier in two places: its
434 message IDs, and in file names for maildir deliveries. Because some OS now
435 re-use pids within the same second, sub-second times are now being used.
436 However, for absolute certainty, we must ensure the clock has ticked before
437 allowing the relevant process to complete. At the time of implementation of
438 this code (February 2003), the speed of processors is such that the clock will
439 invariably have ticked already by the time a process has done its job. This
440 function prepares for the time when things are faster - and it also copes with
441 clocks that go backwards.
444 tgt_tv A timeval which was used to create uniqueness; its usec field
445 has been rounded down to the value of the resolution.
446 We want to be sure the current time is greater than this.
447 resolution The resolution that was used to divide the microseconds
448 (1 for maildir, larger for message ids)
454 exim_wait_tick(struct timeval * tgt_tv, int resolution)
456 struct timeval now_tv;
457 long int now_true_usec;
459 exim_gettime(&now_tv);
460 now_true_usec = now_tv.tv_usec;
461 now_tv.tv_usec = (now_true_usec/resolution) * resolution;
463 while (exim_tvcmp(&now_tv, tgt_tv) <= 0)
465 struct itimerval itval;
466 itval.it_interval.tv_sec = 0;
467 itval.it_interval.tv_usec = 0;
468 itval.it_value.tv_sec = tgt_tv->tv_sec - now_tv.tv_sec;
469 itval.it_value.tv_usec = tgt_tv->tv_usec + resolution - now_true_usec;
471 /* We know that, overall, "now" is less than or equal to "then". Therefore, a
472 negative value for the microseconds is possible only in the case when "now"
473 is more than a second less than "tgt". That means that itval.it_value.tv_sec
474 is greater than zero. The following correction is therefore safe. */
476 if (itval.it_value.tv_usec < 0)
478 itval.it_value.tv_usec += 1000000;
479 itval.it_value.tv_sec -= 1;
482 DEBUG(D_transport|D_receive)
484 if (!f.running_in_test_harness)
486 debug_printf("tick check: " TIME_T_FMT ".%06lu " TIME_T_FMT ".%06lu\n",
487 tgt_tv->tv_sec, (long) tgt_tv->tv_usec,
488 now_tv.tv_sec, (long) now_tv.tv_usec);
489 debug_printf("waiting " TIME_T_FMT ".%06lu sec\n",
490 itval.it_value.tv_sec, (long) itval.it_value.tv_usec);
496 /* Be prapared to go around if the kernel does not implement subtick
497 granularity (GNU Hurd) */
499 exim_gettime(&now_tv);
500 now_true_usec = now_tv.tv_usec;
501 now_tv.tv_usec = (now_true_usec/resolution) * resolution;
508 /*************************************************
509 * Call fopen() with umask 777 and adjust mode *
510 *************************************************/
512 /* Exim runs with umask(0) so that files created with open() have the mode that
513 is specified in the open() call. However, there are some files, typically in
514 the spool directory, that are created with fopen(). They end up world-writeable
515 if no precautions are taken. Although the spool directory is not accessible to
516 the world, this is an untidiness. So this is a wrapper function for fopen()
517 that sorts out the mode of the created file.
520 filename the file name
521 options the fopen() options
522 mode the required mode
524 Returns: the fopened FILE or NULL
528 modefopen(const uschar *filename, const char *options, mode_t mode)
530 mode_t saved_umask = umask(0777);
531 FILE *f = Ufopen(filename, options);
532 (void)umask(saved_umask);
533 if (f != NULL) (void)fchmod(fileno(f), mode);
538 /*************************************************
539 * Ensure stdin, stdout, and stderr exist *
540 *************************************************/
542 /* Some operating systems grumble if an exec() happens without a standard
543 input, output, and error (fds 0, 1, 2) being defined. The worry is that some
544 file will be opened and will use these fd values, and then some other bit of
545 code will assume, for example, that it can write error messages to stderr.
546 This function ensures that fds 0, 1, and 2 are open if they do not already
547 exist, by connecting them to /dev/null.
549 This function is also used to ensure that std{in,out,err} exist at all times,
550 so that if any library that Exim calls tries to use them, it doesn't crash.
561 for (int i = 0; i <= 2; i++)
563 if (fstat(i, &statbuf) < 0 && errno == EBADF)
565 if (devnull < 0) devnull = open("/dev/null", O_RDWR);
566 if (devnull < 0) log_write(0, LOG_MAIN|LOG_PANIC_DIE, "%s",
567 string_open_failed("/dev/null", NULL));
568 if (devnull != i) (void)dup2(devnull, i);
571 if (devnull > 2) (void)close(devnull);
577 /*************************************************
578 * Close unwanted file descriptors for delivery *
579 *************************************************/
581 /* This function is called from a new process that has been forked to deliver
582 an incoming message, either directly, or using exec.
584 We want any smtp input streams to be closed in this new process. However, it
585 has been observed that using fclose() here causes trouble. When reading in -bS
586 input, duplicate copies of messages have been seen. The files will be sharing a
587 file pointer with the parent process, and it seems that fclose() (at least on
588 some systems - I saw this on Solaris 2.5.1) messes with that file pointer, at
589 least sometimes. Hence we go for closing the underlying file descriptors.
591 If TLS is active, we want to shut down the TLS library, but without molesting
592 the parent's SSL connection.
594 For delivery of a non-SMTP message, we want to close stdin and stdout (and
595 stderr unless debugging) because the calling process might have set them up as
596 pipes and be waiting for them to close before it waits for the submission
597 process to terminate. If they aren't closed, they hold up the calling process
598 until the initial delivery process finishes, which is not what we want.
600 Exception: We do want it for synchronous delivery!
602 And notwithstanding all the above, if D_resolver is set, implying resolver
603 debugging, leave stdout open, because that's where the resolver writes its
606 When we close stderr (which implies we've also closed stdout), we also get rid
607 of any controlling terminal.
619 tls_close(NULL, TLS_NO_SHUTDOWN); /* Shut down the TLS library */
621 (void)close(fileno(smtp_in));
622 (void)close(fileno(smtp_out));
627 (void)close(0); /* stdin */
628 if ((debug_selector & D_resolver) == 0) (void)close(1); /* stdout */
629 if (debug_selector == 0) /* stderr */
631 if (!f.synchronous_delivery)
644 /*************************************************
646 *************************************************/
648 /* This function sets a new uid and gid permanently, optionally calling
649 initgroups() to set auxiliary groups. There are some special cases when running
650 Exim in unprivileged modes. In these situations the effective uid will not be
651 root; if we already have the right effective uid/gid, and don't need to
652 initialize any groups, leave things as they are.
657 igflag TRUE if initgroups() wanted
658 msg text to use in debugging output and failure log
660 Returns: nothing; bombs out on failure
664 exim_setugid(uid_t uid, gid_t gid, BOOL igflag, uschar *msg)
666 uid_t euid = geteuid();
667 gid_t egid = getegid();
669 if (euid == root_uid || euid != uid || egid != gid || igflag)
671 /* At least one OS returns +1 for initgroups failure, so just check for
676 struct passwd *pw = getpwuid(uid);
678 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "cannot run initgroups(): "
679 "no passwd entry for uid=%ld", (long int)uid);
681 if (initgroups(pw->pw_name, gid) != 0)
682 log_write(0,LOG_MAIN|LOG_PANIC_DIE,"initgroups failed for uid=%ld: %s",
683 (long int)uid, strerror(errno));
686 if (setgid(gid) < 0 || setuid(uid) < 0)
687 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "unable to set gid=%ld or uid=%ld "
688 "(euid=%ld): %s", (long int)gid, (long int)uid, (long int)euid, msg);
691 /* Debugging output included uid/gid and all groups */
695 int group_count, save_errno;
696 gid_t group_list[EXIM_GROUPLIST_SIZE];
697 debug_printf("changed uid/gid: %s\n uid=%ld gid=%ld pid=%ld\n", msg,
698 (long int)geteuid(), (long int)getegid(), (long int)getpid());
699 group_count = getgroups(nelem(group_list), group_list);
701 debug_printf(" auxiliary group list:");
703 for (int i = 0; i < group_count; i++) debug_printf(" %d", (int)group_list[i]);
704 else if (group_count < 0)
705 debug_printf(" <error: %s>", strerror(save_errno));
706 else debug_printf(" <none>");
714 /*************************************************
716 *************************************************/
718 /* Exim exits via this function so that it always clears up any open
724 Returns: does not return
733 debug_printf(">>>>>>>>>>>>>>>> Exim pid=%d (%s) terminating with rc=%d "
734 ">>>>>>>>>>>>>>>>\n",
735 (int)getpid(), process_purpose, rc);
741 exim_underbar_exit(int rc)
745 debug_printf(">>>>>>>>>>>>>>>> Exim pid=%d (%s) terminating with rc=%d "
746 ">>>>>>>>>>>>>>>>\n",
747 (int)getpid(), process_purpose, rc);
753 /* Print error string, then die */
755 exim_fail(const char * fmt, ...)
759 vfprintf(stderr, fmt, ap);
763 /* fail if a length is too long */
765 exim_len_fail_toolong(int itemlen, int maxlen, const char *description)
767 if (itemlen <= maxlen)
769 fprintf(stderr, "exim: length limit exceeded (%d > %d) for: %s\n",
770 len, maxlen, description)
774 /* only pass through the string item back to the caller if it's short enough */
775 static const uschar *
776 exim_str_fail_toolong(const uschar *item, int maxlen, const char *description)
778 exim_len_fail_toolong(Ustrlen(item), maxlen, description);
782 /* exim_chown_failure() called from exim_chown()/exim_fchown() on failure
783 of chown()/fchown(). See src/functions.h for more explanation */
785 exim_chown_failure(int fd, const uschar *name, uid_t owner, gid_t group)
787 int saved_errno = errno; /* from the preceeding chown call */
789 log_write(0, LOG_MAIN|LOG_PANIC,
790 __FILE__ ":%d: chown(%s, %d:%d) failed (%s)."
791 " Please contact the authors and refer to https://bugs.exim.org/show_bug.cgi?id=2391",
792 __LINE__, name?name:US"<unknown>", owner, group, strerror(errno));
794 /* I leave this here, commented, in case the "bug"(?) comes up again.
795 It is not an Exim bug, but we can provide a workaround.
801 if (0 == (fd < 0 ? stat(name, &buf) : fstat(fd, &buf)))
803 if (buf.st_uid == owner && buf.st_gid == group) return 0;
804 log_write(0, LOG_MAIN|LOG_PANIC, "Wrong ownership on %s", name);
806 else log_write(0, LOG_MAIN|LOG_PANIC, "Stat failed on %s: %s", name, strerror(errno));
814 /*************************************************
815 * Extract port from host address *
816 *************************************************/
818 /* Called to extract the port from the values given to -oMa and -oMi.
819 It also checks the syntax of the address, and terminates it before the
820 port data when a port is extracted.
823 address the address, with possible port on the end
825 Returns: the port, or zero if there isn't one
826 bombs out on a syntax error
830 check_port(uschar *address)
832 int port = host_address_extract_port(address);
833 if (string_is_ip_address(address, NULL) == 0)
834 exim_fail("exim abandoned: \"%s\" is not an IP address\n", address);
840 /*************************************************
841 * Test/verify an address *
842 *************************************************/
844 /* This function is called by the -bv and -bt code. It extracts a working
845 address from a full RFC 822 address. This isn't really necessary per se, but it
846 has the effect of collapsing source routes.
850 flags flag bits for verify_address()
851 exit_value to be set for failures
857 test_address(uschar *s, int flags, int *exit_value)
859 int start, end, domain;
860 uschar *parse_error = NULL;
861 uschar *address = parse_extract_address(s, &parse_error, &start, &end, &domain,
865 fprintf(stdout, "syntax error: %s\n", parse_error);
870 int rc = verify_address(deliver_make_addr(address,TRUE), stdout, flags, -1,
871 -1, -1, NULL, NULL, NULL);
872 if (rc == FAIL) *exit_value = 2;
873 else if (rc == DEFER && *exit_value == 0) *exit_value = 1;
879 /*************************************************
880 * Show supported features *
881 *************************************************/
884 show_db_version(FILE * f)
886 #ifdef DB_VERSION_STRING
889 fprintf(f, "Library version: BDB: Compile: %s\n", DB_VERSION_STRING);
890 fprintf(f, " Runtime: %s\n",
891 db_version(NULL, NULL, NULL));
894 fprintf(f, "Berkeley DB: %s\n", DB_VERSION_STRING);
896 #elif defined(BTREEVERSION) && defined(HASHVERSION)
898 fprintf(f, "Probably Berkeley DB version 1.8x (native mode)\n");
900 fprintf(f, "Probably Berkeley DB version 1.8x (compatibility mode)\n");
903 #elif defined(_DBM_RDONLY) || defined(dbm_dirfno)
904 fprintf(f, "Probably ndbm\n");
905 #elif defined(USE_TDB)
906 fprintf(f, "Using tdb\n");
909 fprintf(f, "Probably GDBM (native mode)\n");
911 fprintf(f, "Probably GDBM (compatibility mode)\n");
917 /* This function is called for -bV/--version and for -d to output the optional
918 features of the current Exim binary.
920 Arguments: a FILE for printing
925 show_whats_supported(FILE * fp)
927 rmark reset_point = store_mark();
929 DEBUG(D_any) {} else show_db_version(fp);
931 g = string_cat(NULL, US"Support for:");
932 #ifdef SUPPORT_CRYPTEQ
933 g = string_cat(g, US" crypteq");
936 g = string_cat(g, US" iconv()");
939 g = string_cat(g, US" IPv6");
941 #ifdef HAVE_SETCLASSRESOURCES
942 g = string_cat(g, US" use_setclassresources");
945 g = string_cat(g, US" PAM");
948 g = string_cat(g, US" Perl");
951 g = string_cat(g, US" Expand_dlfunc");
953 #ifdef USE_TCP_WRAPPERS
954 g = string_cat(g, US" TCPwrappers");
957 g = string_cat(g, US" GnuTLS");
960 g = string_cat(g, US" OpenSSL");
962 #ifndef DISABLE_TLS_RESUME
963 g = string_cat(g, US" TLS_resume");
965 #ifdef SUPPORT_TRANSLATE_IP_ADDRESS
966 g = string_cat(g, US" translate_ip_address");
968 #ifdef SUPPORT_MOVE_FROZEN_MESSAGES
969 g = string_cat(g, US" move_frozen_messages");
971 #ifdef WITH_CONTENT_SCAN
972 g = string_cat(g, US" Content_Scanning");
975 g = string_cat(g, US" DANE");
978 g = string_cat(g, US" DKIM");
981 g = string_cat(g, US" DMARC");
983 #ifndef DISABLE_DNSSEC
984 g = string_cat(g, US" DNSSEC");
986 #ifndef DISABLE_EVENT
987 g = string_cat(g, US" Event");
990 g = string_cat(g, US" I18N");
993 g = string_cat(g, US" OCSP");
995 #ifndef DISABLE_PIPE_CONNECT
996 g = string_cat(g, US" PIPE_CONNECT");
999 g = string_cat(g, US" PRDR");
1001 #ifdef SUPPORT_PROXY
1002 g = string_cat(g, US" PROXY");
1004 #ifndef DISABLE_QUEUE_RAMP
1005 g = string_cat(g, US" Experimental_Queue_Ramp");
1007 #ifdef SUPPORT_SOCKS
1008 g = string_cat(g, US" SOCKS");
1011 g = string_cat(g, US" SPF");
1013 #if defined(SUPPORT_SRS)
1014 g = string_cat(g, US" SRS");
1018 if (f.tcp_fastopen_ok) g = string_cat(g, US" TCP_Fast_Open");
1020 #ifdef EXPERIMENTAL_ARC
1021 g = string_cat(g, US" Experimental_ARC");
1023 #ifdef EXPERIMENTAL_BRIGHTMAIL
1024 g = string_cat(g, US" Experimental_Brightmail");
1026 #ifdef EXPERIMENTAL_DCC
1027 g = string_cat(g, US" Experimental_DCC");
1029 #ifdef EXPERIMENTAL_DSN_INFO
1030 g = string_cat(g, US" Experimental_DSN_info");
1032 #ifdef EXPERIMENTAL_ESMTP_LIMITS
1033 g = string_cat(g, US" Experimental_ESMTP_Limits");
1035 #ifdef EXPERIMENTAL_QUEUEFILE
1036 g = string_cat(g, US" Experimental_QUEUEFILE");
1038 #if defined(EXPERIMENTAL_SRS_ALT)
1039 g = string_cat(g, US" Experimental_SRS");
1041 g = string_cat(g, US"\n");
1043 g = string_cat(g, US"Lookups (built-in):");
1044 #if defined(LOOKUP_LSEARCH) && LOOKUP_LSEARCH!=2
1045 g = string_cat(g, US" lsearch wildlsearch nwildlsearch iplsearch");
1047 #if defined(LOOKUP_CDB) && LOOKUP_CDB!=2
1048 g = string_cat(g, US" cdb");
1050 #if defined(LOOKUP_DBM) && LOOKUP_DBM!=2
1051 g = string_cat(g, US" dbm dbmjz dbmnz");
1053 #if defined(LOOKUP_DNSDB) && LOOKUP_DNSDB!=2
1054 g = string_cat(g, US" dnsdb");
1056 #if defined(LOOKUP_DSEARCH) && LOOKUP_DSEARCH!=2
1057 g = string_cat(g, US" dsearch");
1059 #if defined(LOOKUP_IBASE) && LOOKUP_IBASE!=2
1060 g = string_cat(g, US" ibase");
1062 #if defined(LOOKUP_JSON) && LOOKUP_JSON!=2
1063 g = string_cat(g, US" json");
1065 #if defined(LOOKUP_LDAP) && LOOKUP_LDAP!=2
1066 g = string_cat(g, US" ldap ldapdn ldapm");
1069 g = string_cat(g, US" lmdb");
1071 #if defined(LOOKUP_MYSQL) && LOOKUP_MYSQL!=2
1072 g = string_cat(g, US" mysql");
1074 #if defined(LOOKUP_NIS) && LOOKUP_NIS!=2
1075 g = string_cat(g, US" nis nis0");
1077 #if defined(LOOKUP_NISPLUS) && LOOKUP_NISPLUS!=2
1078 g = string_cat(g, US" nisplus");
1080 #if defined(LOOKUP_ORACLE) && LOOKUP_ORACLE!=2
1081 g = string_cat(g, US" oracle");
1083 #if defined(LOOKUP_PASSWD) && LOOKUP_PASSWD!=2
1084 g = string_cat(g, US" passwd");
1086 #if defined(LOOKUP_PGSQL) && LOOKUP_PGSQL!=2
1087 g = string_cat(g, US" pgsql");
1089 #if defined(LOOKUP_REDIS) && LOOKUP_REDIS!=2
1090 g = string_cat(g, US" redis");
1092 #if defined(LOOKUP_SQLITE) && LOOKUP_SQLITE!=2
1093 g = string_cat(g, US" sqlite");
1095 #if defined(LOOKUP_TESTDB) && LOOKUP_TESTDB!=2
1096 g = string_cat(g, US" testdb");
1098 #if defined(LOOKUP_WHOSON) && LOOKUP_WHOSON!=2
1099 g = string_cat(g, US" whoson");
1101 g = string_cat(g, US"\n");
1103 g = auth_show_supported(g);
1104 g = route_show_supported(g);
1105 g = transport_show_supported(g);
1107 #ifdef WITH_CONTENT_SCAN
1108 g = malware_show_supported(g);
1111 if (fixed_never_users[0] > 0)
1114 g = string_cat(g, US"Fixed never_users: ");
1115 for (i = 1; i <= (int)fixed_never_users[0] - 1; i++)
1116 string_fmt_append(g, "%u:", (unsigned)fixed_never_users[i]);
1117 g = string_fmt_append(g, "%u\n", (unsigned)fixed_never_users[i]);
1120 g = string_fmt_append(g, "Configure owner: %d:%d\n", config_uid, config_gid);
1121 fputs(CS string_from_gstring(g), fp);
1123 fprintf(fp, "Size of off_t: " SIZE_T_FMT "\n", sizeof(off_t));
1125 /* Everything else is details which are only worth reporting when debugging.
1126 Perhaps the tls_version_report should move into this too. */
1129 /* clang defines __GNUC__ (at least, for me) so test for it first */
1130 #if defined(__clang__)
1131 fprintf(fp, "Compiler: CLang [%s]\n", __clang_version__);
1132 #elif defined(__GNUC__)
1133 fprintf(fp, "Compiler: GCC [%s]\n",
1137 "? unknown version ?"
1141 fprintf(fp, "Compiler: <unknown>\n");
1144 #if defined(__GLIBC__) && !defined(__UCLIBC__)
1145 fprintf(fp, "Library version: Glibc: Compile: %d.%d\n",
1146 __GLIBC__, __GLIBC_MINOR__);
1147 if (__GLIBC_PREREQ(2, 1))
1148 fprintf(fp, " Runtime: %s\n",
1149 gnu_get_libc_version());
1152 show_db_version(fp);
1155 tls_version_report(fp);
1158 utf8_version_report(fp);
1160 #ifdef SUPPORT_DMARC
1161 dmarc_version_report(fp);
1164 spf_lib_version_report(fp);
1167 for (auth_info * authi = auths_available; *authi->driver_name != '\0'; ++authi)
1168 if (authi->version_report)
1169 (*authi->version_report)(fp);
1171 /* PCRE_PRERELEASE is either defined and empty or a bare sequence of
1172 characters; unless it's an ancient version of PCRE in which case it
1174 #ifndef PCRE_PRERELEASE
1175 # define PCRE_PRERELEASE
1178 #define EXPAND_AND_QUOTE(X) QUOTE(X)
1179 fprintf(fp, "Library version: PCRE: Compile: %d.%d%s\n"
1181 PCRE_MAJOR, PCRE_MINOR,
1182 EXPAND_AND_QUOTE(PCRE_PRERELEASE) "",
1185 #undef EXPAND_AND_QUOTE
1188 for (int i = 0; i < lookup_list_count; i++)
1189 if (lookup_list[i]->version_report)
1190 lookup_list[i]->version_report(fp);
1192 #ifdef WHITELIST_D_MACROS
1193 fprintf(fp, "WHITELIST_D_MACROS: \"%s\"\n", WHITELIST_D_MACROS);
1195 fprintf(fp, "WHITELIST_D_MACROS unset\n");
1197 #ifdef TRUSTED_CONFIG_LIST
1198 fprintf(fp, "TRUSTED_CONFIG_LIST: \"%s\"\n", TRUSTED_CONFIG_LIST);
1200 fprintf(fp, "TRUSTED_CONFIG_LIST unset\n");
1204 store_reset(reset_point);
1208 /*************************************************
1209 * Show auxiliary information about Exim *
1210 *************************************************/
1213 show_exim_information(enum commandline_info request, FILE *stream)
1218 fprintf(stream, "Oops, something went wrong.\n");
1222 "The -bI: flag takes a string indicating which information to provide.\n"
1223 "If the string is not recognised, you'll get this help (on stderr).\n"
1225 " exim -bI:help this information\n"
1226 " exim -bI:dscp list of known dscp value keywords\n"
1227 " exim -bI:sieve list of supported sieve extensions\n"
1231 for (const uschar ** pp = exim_sieve_extension_list; *pp; ++pp)
1232 fprintf(stream, "%s\n", *pp);
1235 dscp_list_to_stream(stream);
1241 /*************************************************
1242 * Quote a local part *
1243 *************************************************/
1245 /* This function is used when a sender address or a From: or Sender: header
1246 line is being created from the caller's login, or from an authenticated_id. It
1247 applies appropriate quoting rules for a local part.
1249 Argument: the local part
1250 Returns: the local part, quoted if necessary
1254 local_part_quote(uschar *lpart)
1256 BOOL needs_quote = FALSE;
1259 for (uschar * t = lpart; !needs_quote && *t != 0; t++)
1261 needs_quote = !isalnum(*t) && strchr("!#$%&'*+-/=?^_`{|}~", *t) == NULL &&
1262 (*t != '.' || t == lpart || t[1] == 0);
1265 if (!needs_quote) return lpart;
1267 g = string_catn(NULL, US"\"", 1);
1271 uschar *nq = US Ustrpbrk(lpart, "\\\"");
1274 g = string_cat(g, lpart);
1277 g = string_catn(g, lpart, nq - lpart);
1278 g = string_catn(g, US"\\", 1);
1279 g = string_catn(g, nq, 1);
1283 g = string_catn(g, US"\"", 1);
1284 return string_from_gstring(g);
1290 /*************************************************
1291 * Load readline() functions *
1292 *************************************************/
1294 /* This function is called from testing executions that read data from stdin,
1295 but only when running as the calling user. Currently, only -be does this. The
1296 function loads the readline() function library and passes back the functions.
1297 On some systems, it needs the curses library, so load that too, but try without
1298 it if loading fails. All this functionality has to be requested at build time.
1301 fn_readline_ptr pointer to where to put the readline pointer
1302 fn_addhist_ptr pointer to where to put the addhistory function
1304 Returns: the dlopen handle or NULL on failure
1308 set_readline(char * (**fn_readline_ptr)(const char *),
1309 void (**fn_addhist_ptr)(const char *))
1312 void *dlhandle_curses = dlopen("libcurses." DYNLIB_FN_EXT, RTLD_GLOBAL|RTLD_LAZY);
1314 dlhandle = dlopen("libreadline." DYNLIB_FN_EXT, RTLD_GLOBAL|RTLD_NOW);
1315 if (dlhandle_curses) dlclose(dlhandle_curses);
1319 /* Checked manual pages; at least in GNU Readline 6.1, the prototypes are:
1320 * char * readline (const char *prompt);
1321 * void add_history (const char *string);
1323 *fn_readline_ptr = (char *(*)(const char*))dlsym(dlhandle, "readline");
1324 *fn_addhist_ptr = (void(*)(const char*))dlsym(dlhandle, "add_history");
1327 DEBUG(D_any) debug_printf("failed to load readline: %s\n", dlerror());
1335 /*************************************************
1336 * Get a line from stdin for testing things *
1337 *************************************************/
1339 /* This function is called when running tests that can take a number of lines
1340 of input (for example, -be and -bt). It handles continuations and trailing
1341 spaces. And prompting and a blank line output on eof. If readline() is in use,
1342 the arguments are non-NULL and provide the relevant functions.
1345 fn_readline readline function or NULL
1346 fn_addhist addhist function or NULL
1348 Returns: pointer to dynamic memory, or NULL at end of file
1352 get_stdinput(char *(*fn_readline)(const char *), void(*fn_addhist)(const char *))
1356 if (!fn_readline) { printf("> "); fflush(stdout); }
1358 for (int i = 0;; i++)
1360 uschar buffer[1024];
1364 char *readline_line = NULL;
1367 if (!(readline_line = fn_readline((i > 0)? "":"> "))) break;
1368 if (*readline_line != 0 && fn_addhist) fn_addhist(readline_line);
1369 p = US readline_line;
1374 /* readline() not in use */
1377 if (Ufgets(buffer, sizeof(buffer), stdin) == NULL) break;
1381 /* Handle the line */
1383 ss = p + (int)Ustrlen(p);
1384 while (ss > p && isspace(ss[-1])) ss--;
1387 while (p < ss && isspace(*p)) p++; /* leading space after cont */
1389 g = string_catn(g, p, ss - p);
1392 if (fn_readline) free(readline_line);
1395 /* g can only be NULL if ss==p */
1396 if (ss == p || g->s[g->ptr-1] != '\\')
1400 (void) string_from_gstring(g);
1403 if (!g) printf("\n");
1404 return string_from_gstring(g);
1409 /*************************************************
1410 * Output usage information for the program *
1411 *************************************************/
1413 /* This function is called when there are no recipients
1414 or a specific --help argument was added.
1417 progname information on what name we were called by
1419 Returns: DOES NOT RETURN
1423 exim_usage(uschar *progname)
1426 /* Handle specific program invocation variants */
1427 if (Ustrcmp(progname, US"-mailq") == 0)
1429 "mailq - list the contents of the mail queue\n\n"
1430 "For a list of options, see the Exim documentation.\n");
1432 /* Generic usage - we output this whatever happens */
1434 "Exim is a Mail Transfer Agent. It is normally called by Mail User Agents,\n"
1435 "not directly from a shell command line. Options and/or arguments control\n"
1436 "what it does when called. For a list of options, see the Exim documentation.\n");
1441 /*************************************************
1442 * Validate that the macros given are okay *
1443 *************************************************/
1445 /* Typically, Exim will drop privileges if macros are supplied. In some
1446 cases, we want to not do so.
1448 Arguments: opt_D_used - true if the commandline had a "-D" option
1449 Returns: true if trusted, false otherwise
1453 macros_trusted(BOOL opt_D_used)
1455 #ifdef WHITELIST_D_MACROS
1456 uschar *whitelisted, *end, *p, **whites;
1457 int white_count, i, n;
1459 BOOL prev_char_item, found;
1464 #ifndef WHITELIST_D_MACROS
1468 /* We only trust -D overrides for some invoking users:
1469 root, the exim run-time user, the optional config owner user.
1470 I don't know why config-owner would be needed, but since they can own the
1471 config files anyway, there's no security risk to letting them override -D. */
1472 if ( ! ((real_uid == root_uid)
1473 || (real_uid == exim_uid)
1474 #ifdef CONFIGURE_OWNER
1475 || (real_uid == config_uid)
1479 debug_printf("macros_trusted rejecting macros for uid %d\n", (int) real_uid);
1483 /* Get a list of macros which are whitelisted */
1484 whitelisted = string_copy_perm(US WHITELIST_D_MACROS, FALSE);
1485 prev_char_item = FALSE;
1487 for (p = whitelisted; *p != '\0'; ++p)
1489 if (*p == ':' || isspace(*p))
1494 prev_char_item = FALSE;
1497 if (!prev_char_item)
1498 prev_char_item = TRUE;
1505 whites = store_malloc(sizeof(uschar *) * (white_count+1));
1506 for (p = whitelisted, i = 0; (p != end) && (i < white_count); ++p)
1511 if (i == white_count)
1513 while (*p != '\0' && p < end)
1519 /* The list of commandline macros should be very short.
1520 Accept the N*M complexity. */
1521 for (macro_item * m = macros_user; m; m = m->next) if (m->command_line)
1524 for (uschar ** w = whites; *w; ++w)
1525 if (Ustrcmp(*w, m->name) == 0)
1532 if (!m->replacement)
1534 if ((len = m->replen) == 0)
1536 n = pcre_exec(regex_whitelisted_macro, NULL, CS m->replacement, len,
1537 0, PCRE_EOPT, NULL, 0);
1540 if (n != PCRE_ERROR_NOMATCH)
1541 debug_printf("macros_trusted checking %s returned %d\n", m->name, n);
1545 DEBUG(D_any) debug_printf("macros_trusted overridden to true by whitelisting\n");
1551 /*************************************************
1552 * Expansion testing *
1553 *************************************************/
1555 /* Expand and print one item, doing macro-processing.
1558 item line for expansion
1562 expansion_test_line(uschar * line)
1567 Ustrncpy(big_buffer, line, big_buffer_size);
1568 big_buffer[big_buffer_size-1] = '\0';
1569 len = Ustrlen(big_buffer);
1571 (void) macros_expand(0, &len, &dummy_macexp);
1573 if (isupper(big_buffer[0]))
1575 if (macro_read_assignment(big_buffer))
1576 printf("Defined macro '%s'\n", mlast->name);
1579 if ((line = expand_string(big_buffer))) printf("%s\n", CS line);
1580 else printf("Failed: %s\n", expand_string_message);
1585 /*************************************************
1586 * Entry point and high-level code *
1587 *************************************************/
1589 /* Entry point for the Exim mailer. Analyse the arguments and arrange to take
1590 the appropriate action. All the necessary functions are present in the one
1591 binary. I originally thought one should split it up, but it turns out that so
1592 much of the apparatus is needed in each chunk that one might as well just have
1593 it all available all the time, which then makes the coding easier as well.
1596 argc count of entries in argv
1597 argv argument strings, with argv[0] being the program name
1599 Returns: EXIT_SUCCESS if terminated successfully
1600 EXIT_FAILURE otherwise, except when a message has been sent
1601 to the sender, and -oee was given
1605 main(int argc, char **cargv)
1607 uschar **argv = USS cargv;
1608 int arg_receive_timeout = -1;
1609 int arg_smtp_receive_timeout = -1;
1610 int arg_error_handling = error_handling;
1611 int filter_sfd = -1;
1612 int filter_ufd = -1;
1615 int list_queue_option = 0;
1617 int msg_action_arg = -1;
1618 int namelen = (argv[0] == NULL)? 0 : Ustrlen(argv[0]);
1619 int queue_only_reason = 0;
1621 int perl_start_option = 0;
1623 int recipients_arg = argc;
1624 int sender_address_domain = 0;
1625 int test_retry_arg = -1;
1626 int test_rewrite_arg = -1;
1627 gid_t original_egid;
1628 BOOL arg_queue_only = FALSE;
1629 BOOL bi_option = FALSE;
1630 BOOL checking = FALSE;
1631 BOOL count_queue = FALSE;
1632 BOOL expansion_test = FALSE;
1633 BOOL extract_recipients = FALSE;
1634 BOOL flag_G = FALSE;
1635 BOOL flag_n = FALSE;
1636 BOOL forced_delivery = FALSE;
1637 BOOL f_end_dot = FALSE;
1638 BOOL deliver_give_up = FALSE;
1639 BOOL list_queue = FALSE;
1640 BOOL list_options = FALSE;
1641 BOOL list_config = FALSE;
1642 BOOL local_queue_only;
1644 BOOL one_msg_action = FALSE;
1645 BOOL opt_D_used = FALSE;
1646 BOOL queue_only_set = FALSE;
1647 BOOL receiving_message = TRUE;
1648 BOOL sender_ident_set = FALSE;
1649 BOOL session_local_queue_only;
1651 BOOL removed_privilege = FALSE;
1652 BOOL usage_wanted = FALSE;
1653 BOOL verify_address_mode = FALSE;
1654 BOOL verify_as_sender = FALSE;
1655 BOOL rcpt_verify_quota = FALSE;
1656 BOOL version_printed = FALSE;
1657 uschar *alias_arg = NULL;
1658 uschar *called_as = US"";
1659 uschar *cmdline_syslog_name = NULL;
1660 uschar *start_queue_run_id = NULL;
1661 uschar *stop_queue_run_id = NULL;
1662 uschar *expansion_test_message = NULL;
1663 uschar *ftest_domain = NULL;
1664 uschar *ftest_localpart = NULL;
1665 uschar *ftest_prefix = NULL;
1666 uschar *ftest_suffix = NULL;
1667 uschar *log_oneline = NULL;
1668 uschar *malware_test_file = NULL;
1669 uschar *real_sender_address;
1670 uschar *originator_home = US"/";
1674 struct stat statbuf;
1675 pid_t passed_qr_pid = (pid_t)0;
1676 int passed_qr_pipe = -1;
1677 gid_t group_list[EXIM_GROUPLIST_SIZE];
1679 /* For the -bI: flag */
1680 enum commandline_info info_flag = CMDINFO_NONE;
1681 BOOL info_stdout = FALSE;
1683 /* Possible options for -R and -S */
1685 static uschar *rsopts[] = { US"f", US"ff", US"r", US"rf", US"rff" };
1687 /* Need to define this in case we need to change the environment in order
1688 to get rid of a bogus time zone. We have to make it char rather than uschar
1689 because some OS define it in /usr/include/unistd.h. */
1691 extern char **environ;
1693 #ifdef MEASURE_TIMING
1694 (void)gettimeofday(×tamp_startup, NULL);
1697 store_init(); /* Initialise the memory allocation susbsystem */
1699 /* If the Exim user and/or group and/or the configuration file owner/group were
1700 defined by ref:name at build time, we must now find the actual uid/gid values.
1701 This is a feature to make the lives of binary distributors easier. */
1703 #ifdef EXIM_USERNAME
1704 if (route_finduser(US EXIM_USERNAME, &pw, &exim_uid))
1707 exim_fail("exim: refusing to run with uid 0 for \"%s\"\n", EXIM_USERNAME);
1709 /* If ref:name uses a number as the name, route_finduser() returns
1710 TRUE with exim_uid set and pw coerced to NULL. */
1712 exim_gid = pw->pw_gid;
1713 #ifndef EXIM_GROUPNAME
1716 "exim: ref:name should specify a usercode, not a group.\n"
1717 "exim: can't let you get away with it unless you also specify a group.\n");
1721 exim_fail("exim: failed to find uid for user name \"%s\"\n", EXIM_USERNAME);
1724 #ifdef EXIM_GROUPNAME
1725 if (!route_findgroup(US EXIM_GROUPNAME, &exim_gid))
1726 exim_fail("exim: failed to find gid for group name \"%s\"\n", EXIM_GROUPNAME);
1729 #ifdef CONFIGURE_OWNERNAME
1730 if (!route_finduser(US CONFIGURE_OWNERNAME, NULL, &config_uid))
1731 exim_fail("exim: failed to find uid for user name \"%s\"\n",
1732 CONFIGURE_OWNERNAME);
1735 /* We default the system_filter_user to be the Exim run-time user, as a
1736 sane non-root value. */
1737 system_filter_uid = exim_uid;
1739 #ifdef CONFIGURE_GROUPNAME
1740 if (!route_findgroup(US CONFIGURE_GROUPNAME, &config_gid))
1741 exim_fail("exim: failed to find gid for group name \"%s\"\n",
1742 CONFIGURE_GROUPNAME);
1745 /* In the Cygwin environment, some initialization used to need doing.
1746 It was fudged in by means of this macro; now no longer but we'll leave
1747 it in case of others. */
1753 /* Check a field which is patched when we are running Exim within its
1754 testing harness; do a fast initial check, and then the whole thing. */
1756 f.running_in_test_harness =
1757 *running_status == '<' && Ustrcmp(running_status, "<<<testing>>>") == 0;
1758 if (f.running_in_test_harness)
1761 /* Protect against abusive argv[0] */
1762 exim_len_fail_toolong(argv[0], PATH_MAX, "argv[0]");
1764 /* The C standard says that the equivalent of setlocale(LC_ALL, "C") is obeyed
1765 at the start of a program; however, it seems that some environments do not
1766 follow this. A "strange" locale can affect the formatting of timestamps, so we
1769 setlocale(LC_ALL, "C");
1771 /* Get the offset between CLOCK_MONOTONIC/CLOCK_BOOTTIME and wallclock */
1773 #ifdef _POSIX_MONOTONIC_CLOCK
1777 /* Set up the default handler for timing using alarm(). */
1779 os_non_restarting_signal(SIGALRM, sigalrm_handler);
1781 /* Ensure we have a buffer for constructing log entries. Use malloc directly,
1782 because store_malloc writes a log entry on failure. */
1784 if (!(log_buffer = US malloc(LOG_BUFFER_SIZE)))
1785 exim_fail("exim: failed to get store for log buffer\n");
1787 /* Initialize the default log options. */
1789 bits_set(log_selector, log_selector_size, log_default);
1791 /* Set log_stderr to stderr, provided that stderr exists. This gets reset to
1792 NULL when the daemon is run and the file is closed. We have to use this
1793 indirection, because some systems don't allow writing to the variable "stderr".
1796 if (fstat(fileno(stderr), &statbuf) >= 0) log_stderr = stderr;
1798 /* Arrange for the PCRE regex library to use our store functions. Note that
1799 the normal calls are actually macros that add additional arguments for
1800 debugging purposes so we have to assign specially constructed functions here.
1801 The default is to use store in the stacking pool, but this is overridden in the
1802 regex_must_compile() function. */
1804 pcre_malloc = function_store_get;
1805 pcre_free = function_dummy_free;
1807 /* Ensure there is a big buffer for temporary use in several places. It is put
1808 in malloc store so that it can be freed for enlargement if necessary. */
1810 big_buffer = store_malloc(big_buffer_size);
1812 /* Set up the handler for the data request signal, and set the initial
1813 descriptive text. */
1815 process_info = store_get(PROCESS_INFO_SIZE, TRUE); /* tainted */
1816 set_process_info("initializing");
1817 os_restarting_signal(SIGUSR1, usr1_handler);
1819 /* If running in a dockerized environment, the TERM signal is only
1820 delegated to the PID 1 if we request it by setting an signal handler */
1821 if (getpid() == 1) signal(SIGTERM, term_handler);
1823 /* SIGHUP is used to get the daemon to reconfigure. It gets set as appropriate
1824 in the daemon code. For the rest of Exim's uses, we ignore it. */
1826 signal(SIGHUP, SIG_IGN);
1828 /* We don't want to die on pipe errors as the code is written to handle
1829 the write error instead. */
1831 signal(SIGPIPE, SIG_IGN);
1833 /* Under some circumstance on some OS, Exim can get called with SIGCHLD
1834 set to SIG_IGN. This causes subprocesses that complete before the parent
1835 process waits for them not to hang around, so when Exim calls wait(), nothing
1836 is there. The wait() code has been made robust against this, but let's ensure
1837 that SIGCHLD is set to SIG_DFL, because it's tidier to wait and get a process
1838 ending status. We use sigaction rather than plain signal() on those OS where
1839 SA_NOCLDWAIT exists, because we want to be sure it is turned off. (There was a
1840 problem on AIX with this.) */
1844 struct sigaction act;
1845 act.sa_handler = SIG_DFL;
1846 sigemptyset(&(act.sa_mask));
1848 sigaction(SIGCHLD, &act, NULL);
1851 signal(SIGCHLD, SIG_DFL);
1854 /* Save the arguments for use if we re-exec exim as a daemon after receiving
1859 /* Set up the version number. Set up the leading 'E' for the external form of
1860 message ids, set the pointer to the internal form, and initialize it to
1861 indicate no message being processed. */
1864 message_id_option[0] = '-';
1865 message_id_external = message_id_option + 1;
1866 message_id_external[0] = 'E';
1867 message_id = message_id_external + 1;
1870 /* Set the umask to zero so that any files Exim creates using open() are
1871 created with the modes that it specifies. NOTE: Files created with fopen() have
1872 a problem, which was not recognized till rather late (February 2006). With this
1873 umask, such files will be world writeable. (They are all content scanning files
1874 in the spool directory, which isn't world-accessible, so this is not a
1875 disaster, but it's untidy.) I don't want to change this overall setting,
1876 however, because it will interact badly with the open() calls. Instead, there's
1877 now a function called modefopen() that fiddles with the umask while calling
1882 /* Precompile the regular expression for matching a message id. Keep this in
1883 step with the code that generates ids in the accept.c module. We need to do
1884 this here, because the -M options check their arguments for syntactic validity
1885 using mac_ismsgid, which uses this. */
1888 regex_must_compile(US"^(?:[^\\W_]{6}-){2}[^\\W_]{2}$", FALSE, TRUE);
1890 /* Precompile the regular expression that is used for matching an SMTP error
1891 code, possibly extended, at the start of an error message. Note that the
1892 terminating whitespace character is included. */
1895 regex_must_compile(US"^\\d\\d\\d\\s(?:\\d\\.\\d\\d?\\d?\\.\\d\\d?\\d?\\s)?",
1898 #ifdef WHITELIST_D_MACROS
1899 /* Precompile the regular expression used to filter the content of macros
1900 given to -D for permissibility. */
1902 regex_whitelisted_macro =
1903 regex_must_compile(US"^[A-Za-z0-9_/.-]*$", FALSE, TRUE);
1906 for (i = 0; i < REGEX_VARS; i++) regex_vars[i] = NULL;
1908 /* If the program is called as "mailq" treat it as equivalent to "exim -bp";
1909 this seems to be a generally accepted convention, since one finds symbolic
1910 links called "mailq" in standard OS configurations. */
1912 if ((namelen == 5 && Ustrcmp(argv[0], "mailq") == 0) ||
1913 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/mailq", 6) == 0))
1916 receiving_message = FALSE;
1917 called_as = US"-mailq";
1920 /* If the program is called as "rmail" treat it as equivalent to
1921 "exim -i -oee", thus allowing UUCP messages to be input using non-SMTP mode,
1922 i.e. preventing a single dot on a line from terminating the message, and
1923 returning with zero return code, even in cases of error (provided an error
1924 message has been sent). */
1926 if ((namelen == 5 && Ustrcmp(argv[0], "rmail") == 0) ||
1927 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/rmail", 6) == 0))
1930 called_as = US"-rmail";
1931 errors_sender_rc = EXIT_SUCCESS;
1934 /* If the program is called as "rsmtp" treat it as equivalent to "exim -bS";
1935 this is a smail convention. */
1937 if ((namelen == 5 && Ustrcmp(argv[0], "rsmtp") == 0) ||
1938 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/rsmtp", 6) == 0))
1940 smtp_input = smtp_batched_input = TRUE;
1941 called_as = US"-rsmtp";
1944 /* If the program is called as "runq" treat it as equivalent to "exim -q";
1945 this is a smail convention. */
1947 if ((namelen == 4 && Ustrcmp(argv[0], "runq") == 0) ||
1948 (namelen > 4 && Ustrncmp(argv[0] + namelen - 5, "/runq", 5) == 0))
1951 receiving_message = FALSE;
1952 called_as = US"-runq";
1955 /* If the program is called as "newaliases" treat it as equivalent to
1956 "exim -bi"; this is a sendmail convention. */
1958 if ((namelen == 10 && Ustrcmp(argv[0], "newaliases") == 0) ||
1959 (namelen > 10 && Ustrncmp(argv[0] + namelen - 11, "/newaliases", 11) == 0))
1962 receiving_message = FALSE;
1963 called_as = US"-newaliases";
1966 /* Save the original effective uid for a couple of uses later. It should
1967 normally be root, but in some esoteric environments it may not be. */
1969 original_euid = geteuid();
1970 original_egid = getegid();
1972 /* Get the real uid and gid. If the caller is root, force the effective uid/gid
1973 to be the same as the real ones. This makes a difference only if Exim is setuid
1974 (or setgid) to something other than root, which could be the case in some
1975 special configurations. */
1977 real_uid = getuid();
1978 real_gid = getgid();
1980 if (real_uid == root_uid)
1982 if ((rv = setgid(real_gid)))
1983 exim_fail("exim: setgid(%ld) failed: %s\n",
1984 (long int)real_gid, strerror(errno));
1985 if ((rv = setuid(real_uid)))
1986 exim_fail("exim: setuid(%ld) failed: %s\n",
1987 (long int)real_uid, strerror(errno));
1990 /* If neither the original real uid nor the original euid was root, Exim is
1991 running in an unprivileged state. */
1993 unprivileged = (real_uid != root_uid && original_euid != root_uid);
1995 /* For most of the args-parsing we need to use permanent pool memory */
1997 int old_pool = store_pool;
1998 store_pool = POOL_PERM;
2000 /* Scan the program's arguments. Some can be dealt with right away; others are
2001 simply recorded for checking and handling afterwards. Do a high-level switch
2002 on the second character (the one after '-'), to save some effort. */
2004 for (i = 1; i < argc; i++)
2006 BOOL badarg = FALSE;
2007 uschar * arg = argv[i];
2011 /* An argument not starting with '-' is the start of a recipients list;
2012 break out of the options-scanning loop. */
2020 /* An option consisting of -- terminates the options */
2022 if (Ustrcmp(arg, "--") == 0)
2024 recipients_arg = i + 1;
2028 /* Handle flagged options */
2030 switchchar = arg[1];
2033 /* Make all -ex options synonymous with -oex arguments, since that
2034 is assumed by various callers. Also make -qR options synonymous with -R
2035 options, as that seems to be required as well. Allow for -qqR too, and
2036 the same for -S options. */
2038 if (Ustrncmp(arg+1, "oe", 2) == 0 ||
2039 Ustrncmp(arg+1, "qR", 2) == 0 ||
2040 Ustrncmp(arg+1, "qS", 2) == 0)
2042 switchchar = arg[2];
2045 else if (Ustrncmp(arg+1, "qqR", 3) == 0 || Ustrncmp(arg+1, "qqS", 3) == 0)
2047 switchchar = arg[3];
2049 f.queue_2stage = TRUE;
2052 /* Make -r synonymous with -f, since it is a documented alias */
2054 else if (arg[1] == 'r') switchchar = 'f';
2056 /* Make -ov synonymous with -v */
2058 else if (Ustrcmp(arg, "-ov") == 0)
2064 /* deal with --option_aliases */
2065 else if (switchchar == '-')
2067 if (Ustrcmp(argrest, "help") == 0)
2069 usage_wanted = TRUE;
2072 else if (Ustrcmp(argrest, "version") == 0)
2079 /* High-level switch on active initial letter */
2084 /* sendmail uses -Ac and -Am to control which .cf file is used;
2087 if (!*argrest) { badarg = TRUE; break; }
2090 BOOL ignore = FALSE;
2095 if (*(argrest + 1) == '\0')
2099 if (!ignore) badarg = TRUE;
2103 /* -Btype is a sendmail option for 7bit/8bit setting. Exim is 8-bit clean
2104 so has no need of it. */
2107 if (!*argrest) i++; /* Skip over the type */
2113 receiving_message = FALSE; /* Reset TRUE for -bm, -bS, -bs below */
2117 /* -bd: Run in daemon mode, awaiting SMTP connections.
2118 -bdf: Ditto, but in the foreground.
2121 f.daemon_listen = TRUE;
2122 if (*argrest == 'f') f.background_daemon = FALSE;
2123 else if (*argrest) badarg = TRUE;
2126 /* -be: Run in expansion test mode
2127 -bem: Ditto, but read a message from a file first
2130 expansion_test = checking = TRUE;
2131 if (*argrest == 'm')
2133 if (++i >= argc) { badarg = TRUE; break; }
2134 expansion_test_message = argv[i];
2137 if (*argrest) badarg = TRUE;
2140 /* -bF: Run system filter test */
2142 filter_test |= checking = FTEST_SYSTEM;
2143 if (*argrest) badarg = TRUE;
2144 else if (++i < argc) filter_test_sfile = argv[i];
2145 else exim_fail("exim: file name expected after %s\n", argv[i-1]);
2148 /* -bf: Run user filter test
2149 -bfd: Set domain for filter testing
2150 -bfl: Set local part for filter testing
2151 -bfp: Set prefix for filter testing
2152 -bfs: Set suffix for filter testing
2157 filter_test |= checking = FTEST_USER;
2158 if (++i < argc) filter_test_ufile = argv[i];
2159 else exim_fail("exim: file name expected after %s\n", argv[i-1]);
2164 exim_fail("exim: string expected after %s\n", arg);
2165 if (Ustrcmp(argrest, "d") == 0) ftest_domain = exim_str_fail_toolong(argv[i], EXIM_DOMAINNAME_MAX, "-bfd");
2166 else if (Ustrcmp(argrest, "l") == 0) ftest_localpart = exim_str_fail_toolong(argv[i], EXIM_LOCALPART_MAX, "-bfl");
2167 else if (Ustrcmp(argrest, "p") == 0) ftest_prefix = exim_str_fail_toolong(argv[i], EXIM_LOCALPART_MAX, "-bfp");
2168 else if (Ustrcmp(argrest, "s") == 0) ftest_suffix = exim_str_fail_toolong(argv[i], EXIM_LOCALPART_MAX, "-bfs");
2173 /* -bh: Host checking - an IP address must follow. */
2175 if (!*argrest || Ustrcmp(argrest, "c") == 0)
2177 if (++i >= argc) { badarg = TRUE; break; }
2178 sender_host_address = string_copy_taint(exim_str_fail_toolong(argv[i], EXIM_IPADDR_MAX, "-bh"), TRUE);
2179 host_checking = checking = f.log_testing_mode = TRUE;
2180 f.host_checking_callout = *argrest == 'c';
2181 message_logs = FALSE;
2186 /* -bi: This option is used by sendmail to initialize *the* alias file,
2187 though it has the -oA option to specify a different file. Exim has no
2188 concept of *the* alias file, but since Sun's YP make script calls
2189 sendmail this way, some support must be provided. */
2191 if (!*argrest) bi_option = TRUE;
2195 /* -bI: provide information, of the type to follow after a colon.
2196 This is an Exim flag. */
2198 if (Ustrlen(argrest) >= 1 && *argrest == ':')
2200 uschar *p = argrest+1;
2201 info_flag = CMDINFO_HELP;
2203 if (strcmpic(p, CUS"sieve") == 0)
2205 info_flag = CMDINFO_SIEVE;
2208 else if (strcmpic(p, CUS"dscp") == 0)
2210 info_flag = CMDINFO_DSCP;
2213 else if (strcmpic(p, CUS"help") == 0)
2219 /* -bm: Accept and deliver message - the default option. Reinstate
2220 receiving_message, which got turned off for all -b options.
2221 -bmalware: test the filename given for malware */
2223 if (!*argrest) receiving_message = TRUE;
2224 else if (Ustrcmp(argrest, "alware") == 0)
2226 if (++i >= argc) { badarg = TRUE; break; }
2228 malware_test_file = argv[i];
2233 /* -bnq: For locally originating messages, do not qualify unqualified
2234 addresses. In the envelope, this causes errors; in header lines they
2237 if (Ustrcmp(argrest, "q") == 0)
2239 f.allow_unqualified_sender = FALSE;
2240 f.allow_unqualified_recipient = FALSE;
2245 /* -bpxx: List the contents of the mail queue, in various forms. If
2246 the option is -bpc, just a queue count is needed. Otherwise, if the
2247 first letter after p is r, then order is random. */
2249 if (*argrest == 'c')
2252 if (*++argrest) badarg = TRUE;
2256 if (*argrest == 'r')
2258 list_queue_option = 8;
2261 else list_queue_option = 0;
2265 /* -bp: List the contents of the mail queue, top-level only */
2269 /* -bpu: List the contents of the mail queue, top-level undelivered */
2271 else if (Ustrcmp(argrest, "u") == 0) list_queue_option += 1;
2273 /* -bpa: List the contents of the mail queue, including all delivered */
2275 else if (Ustrcmp(argrest, "a") == 0) list_queue_option += 2;
2277 /* Unknown after -bp[r] */
2283 /* -bP: List the configuration variables given as the address list.
2284 Force -v, so configuration errors get displayed. */
2287 /* -bP config: we need to setup here, because later,
2288 when list_options is checked, the config is read already */
2291 else if (argv[i+1] && Ustrcmp(argv[i+1], "config") == 0)
2294 readconf_save_config(version_string);
2298 list_options = TRUE;
2299 debug_selector |= D_v;
2300 debug_file = stderr;
2304 /* -brt: Test retry configuration lookup */
2306 if (Ustrcmp(argrest, "t") == 0)
2309 test_retry_arg = i + 1;
2313 /* -brw: Test rewrite configuration */
2315 else if (Ustrcmp(argrest, "w") == 0)
2318 test_rewrite_arg = i + 1;
2324 /* -bS: Read SMTP commands on standard input, but produce no replies -
2325 all errors are reported by sending messages. */
2328 smtp_input = smtp_batched_input = receiving_message = TRUE;
2332 /* -bs: Read SMTP commands on standard input and produce SMTP replies
2333 on standard output. */
2335 if (!*argrest) smtp_input = receiving_message = TRUE;
2339 /* -bt: address testing mode */
2342 f.address_test_mode = checking = f.log_testing_mode = TRUE;
2346 /* -bv: verify addresses */
2349 verify_address_mode = checking = f.log_testing_mode = TRUE;
2351 /* -bvs: verify sender addresses */
2353 else if (Ustrcmp(argrest, "s") == 0)
2355 verify_address_mode = checking = f.log_testing_mode = TRUE;
2356 verify_as_sender = TRUE;
2361 /* -bV: Print version string and support details */
2365 printf("Exim version %s #%s built %s\n", version_string,
2366 version_cnumber, version_date);
2367 printf("%s\n", CS version_copyright);
2368 version_printed = TRUE;
2369 show_whats_supported(stdout);
2370 f.log_testing_mode = TRUE;
2375 /* -bw: inetd wait mode, accept a listening socket as stdin */
2377 f.inetd_wait_mode = TRUE;
2378 f.background_daemon = FALSE;
2379 f.daemon_listen = TRUE;
2381 if ((inetd_wait_timeout = readconf_readtime(argrest, 0, FALSE)) <= 0)
2382 exim_fail("exim: bad time value %s: abandoned\n", argv[i]);
2393 /* -C: change configuration file list; ignore if it isn't really
2394 a change! Enforce a prefix check if required. */
2398 if (++i < argc) argrest = argv[i]; else { badarg = TRUE; break; }
2399 if (Ustrcmp(config_main_filelist, argrest) != 0)
2401 #ifdef ALT_CONFIG_PREFIX
2403 int len = Ustrlen(ALT_CONFIG_PREFIX);
2404 const uschar *list = argrest;
2406 /* The argv is untainted, so big_buffer (also untainted) is ok to use */
2407 while((filename = string_nextinlist(&list, &sep, big_buffer,
2409 if ( ( Ustrlen(filename) < len
2410 || Ustrncmp(filename, ALT_CONFIG_PREFIX, len) != 0
2411 || Ustrstr(filename, "/../") != NULL
2413 && (Ustrcmp(filename, "/dev/null") != 0 || real_uid != root_uid)
2415 exim_fail("-C Permission denied\n");
2417 if (real_uid != root_uid)
2419 #ifdef TRUSTED_CONFIG_LIST
2421 if (real_uid != exim_uid
2422 #ifdef CONFIGURE_OWNER
2423 && real_uid != config_uid
2426 f.trusted_config = FALSE;
2429 FILE *trust_list = Ufopen(TRUSTED_CONFIG_LIST, "rb");
2432 struct stat statbuf;
2434 if (fstat(fileno(trust_list), &statbuf) != 0 ||
2435 (statbuf.st_uid != root_uid /* owner not root */
2436 #ifdef CONFIGURE_OWNER
2437 && statbuf.st_uid != config_uid /* owner not the special one */
2440 (statbuf.st_gid != root_gid /* group not root */
2441 #ifdef CONFIGURE_GROUP
2442 && statbuf.st_gid != config_gid /* group not the special one */
2444 && (statbuf.st_mode & 020) != 0 /* group writeable */
2446 (statbuf.st_mode & 2) != 0) /* world writeable */
2448 f.trusted_config = FALSE;
2453 /* Well, the trust list at least is up to scratch... */
2455 uschar *trusted_configs[32];
2458 int old_pool = store_pool;
2459 store_pool = POOL_MAIN;
2461 reset_point = store_mark();
2462 while (Ufgets(big_buffer, big_buffer_size, trust_list))
2464 uschar *start = big_buffer, *nl;
2465 while (*start && isspace(*start))
2469 nl = Ustrchr(start, '\n');
2472 trusted_configs[nr_configs++] = string_copy(start);
2473 if (nr_configs == nelem(trusted_configs))
2481 const uschar *list = argrest;
2483 while (f.trusted_config && (filename = string_nextinlist(&list,
2484 &sep, big_buffer, big_buffer_size)))
2486 for (i=0; i < nr_configs; i++)
2487 if (Ustrcmp(filename, trusted_configs[i]) == 0)
2489 if (i == nr_configs)
2491 f.trusted_config = FALSE;
2496 else /* No valid prefixes found in trust_list file. */
2497 f.trusted_config = FALSE;
2498 store_reset(reset_point);
2499 store_pool = old_pool;
2502 else /* Could not open trust_list file. */
2503 f.trusted_config = FALSE;
2506 /* Not root; don't trust config */
2507 f.trusted_config = FALSE;
2511 config_main_filelist = argrest;
2512 f.config_changed = TRUE;
2517 /* -D: set up a macro definition */
2520 #ifdef DISABLE_D_OPTION
2521 exim_fail("exim: -D is not available in this Exim binary\n");
2527 uschar *s = argrest;
2530 while (isspace(*s)) s++;
2532 if (*s < 'A' || *s > 'Z')
2533 exim_fail("exim: macro name set by -D must start with "
2534 "an upper case letter\n");
2536 while (isalnum(*s) || *s == '_')
2538 if (ptr < sizeof(name)-1) name[ptr++] = *s;
2542 if (ptr == 0) { badarg = TRUE; break; }
2543 while (isspace(*s)) s++;
2546 if (*s++ != '=') { badarg = TRUE; break; }
2547 while (isspace(*s)) s++;
2550 for (m = macros_user; m; m = m->next)
2551 if (Ustrcmp(m->name, name) == 0)
2552 exim_fail("exim: duplicated -D in command line\n");
2554 m = macro_create(name, s, TRUE);
2556 if (clmacro_count >= MAX_CLMACROS)
2557 exim_fail("exim: too many -D options on command line\n");
2558 clmacros[clmacro_count++] =
2559 string_sprintf("-D%s=%s", m->name, m->replacement);
2564 /* -d: Set debug level (see also -v below) or set the drop_cr option.
2565 The latter is now a no-op, retained for compatibility only. If -dd is used,
2566 debugging subprocesses of the daemon is disabled. */
2569 if (Ustrcmp(argrest, "ropcr") == 0)
2571 /* drop_cr = TRUE; */
2574 /* Use an intermediate variable so that we don't set debugging while
2575 decoding the debugging bits. */
2579 unsigned int selector = D_default;
2582 if (*argrest == 'd')
2584 f.debug_daemon = TRUE;
2588 decode_bits(&selector, 1, debug_notall, argrest,
2589 debug_options, debug_options_count, US"debug", 0);
2590 debug_selector = selector;
2595 /* -E: This is a local error message. This option is not intended for
2596 external use at all, but is not restricted to trusted callers because it
2597 does no harm (just suppresses certain error messages) and if Exim is run
2598 not setuid root it won't always be trusted when it generates error
2599 messages using this option. If there is a message id following -E, point
2600 message_reference at it, for logging. */
2603 f.local_error_message = TRUE;
2604 if (mac_ismsgid(argrest)) message_reference = argrest;
2608 /* -ex: The vacation program calls sendmail with the undocumented "-eq"
2609 option, so it looks as if historically the -oex options are also callable
2610 without the leading -o. So we have to accept them. Before the switch,
2611 anything starting -oe has been converted to -e. Exim does not support all
2612 of the sendmail error options. */
2615 if (Ustrcmp(argrest, "e") == 0)
2617 arg_error_handling = ERRORS_SENDER;
2618 errors_sender_rc = EXIT_SUCCESS;
2620 else if (Ustrcmp(argrest, "m") == 0) arg_error_handling = ERRORS_SENDER;
2621 else if (Ustrcmp(argrest, "p") == 0) arg_error_handling = ERRORS_STDERR;
2622 else if (Ustrcmp(argrest, "q") == 0) arg_error_handling = ERRORS_STDERR;
2623 else if (Ustrcmp(argrest, "w") == 0) arg_error_handling = ERRORS_SENDER;
2628 /* -F: Set sender's full name, used instead of the gecos entry from
2629 the password file. Since users can usually alter their gecos entries,
2630 there's no security involved in using this instead. The data can follow
2631 the -F or be in the next argument. */
2635 if (++i < argc) argrest = argv[i]; else { badarg = TRUE; break; }
2636 originator_name = string_copy_taint(exim_str_fail_toolong(argrest, EXIM_HUMANNAME_MAX, "-F"), TRUE);
2637 f.sender_name_forced = TRUE;
2641 /* -f: Set sender's address - this value is only actually used if Exim is
2642 run by a trusted user, or if untrusted_set_sender is set and matches the
2643 address, except that the null address can always be set by any user. The
2644 test for this happens later, when the value given here is ignored when not
2645 permitted. For an untrusted user, the actual sender is still put in Sender:
2646 if it doesn't match the From: header (unless no_local_from_check is set).
2647 The data can follow the -f or be in the next argument. The -r switch is an
2648 obsolete form of -f but since there appear to be programs out there that
2649 use anything that sendmail has ever supported, better accept it - the
2650 synonymizing is done before the switch above.
2652 At this stage, we must allow domain literal addresses, because we don't
2653 know what the setting of allow_domain_literals is yet. Ditto for trailing
2654 dots and strip_trailing_dot. */
2658 int dummy_start, dummy_end;
2661 if (i+1 < argc) argrest = argv[++i]; else { badarg = TRUE; break; }
2662 (void) exim_str_fail_toolong(argrest, EXIM_DISPLAYMAIL_MAX, "-f");
2664 *(sender_address = store_get(1, FALSE)) = '\0'; /* Ensure writeable memory */
2667 uschar * temp = argrest + Ustrlen(argrest) - 1;
2668 while (temp >= argrest && isspace(*temp)) temp--;
2669 if (temp >= argrest && *temp == '.') f_end_dot = TRUE;
2670 allow_domain_literals = TRUE;
2671 strip_trailing_dot = TRUE;
2673 allow_utf8_domains = TRUE;
2675 if (!(sender_address = parse_extract_address(argrest, &errmess,
2676 &dummy_start, &dummy_end, &sender_address_domain, TRUE)))
2677 exim_fail("exim: bad -f address \"%s\": %s\n", argrest, errmess);
2679 sender_address = string_copy_taint(sender_address, TRUE);
2681 message_smtputf8 = string_is_utf8(sender_address);
2682 allow_utf8_domains = FALSE;
2684 allow_domain_literals = FALSE;
2685 strip_trailing_dot = FALSE;
2687 f.sender_address_forced = TRUE;
2691 /* -G: sendmail invocation to specify that it's a gateway submission and
2692 sendmail may complain about problems instead of fixing them.
2693 We make it equivalent to an ACL "control = suppress_local_fixups" and do
2694 not at this time complain about problems. */
2700 /* -h: Set the hop count for an incoming message. Exim does not currently
2701 support this; it always computes it by counting the Received: headers.
2702 To put it in will require a change to the spool header file format. */
2706 if (++i < argc) argrest = argv[i]; else { badarg = TRUE; break; }
2707 if (!isdigit(*argrest)) badarg = TRUE;
2711 /* -i: Set flag so dot doesn't end non-SMTP input (same as -oi, seems
2712 not to be documented for sendmail but mailx (at least) uses it) */
2715 if (!*argrest) f.dot_ends = FALSE; else badarg = TRUE;
2719 /* -L: set the identifier used for syslog; equivalent to setting
2720 syslog_processname in the config file, but needs to be an admin option. */
2724 if (++i < argc) argrest = argv[i]; else { badarg = TRUE; break; }
2725 if ((sz = Ustrlen(argrest)) > 32)
2726 exim_fail("exim: the -L syslog name is too long: \"%s\"\n", argrest);
2728 exim_fail("exim: the -L syslog name is too short\n");
2729 cmdline_syslog_name = string_copy_taint(argrest, TRUE);
2733 receiving_message = FALSE;
2735 /* -MC: continue delivery of another message via an existing open
2736 file descriptor. This option is used for an internal call by the
2737 smtp transport when there is a pending message waiting to go to an
2738 address to which it has got a connection. Five subsequent arguments are
2739 required: transport name, host name, IP address, sequence number, and
2740 message_id. Transports may decline to create new processes if the sequence
2741 number gets too big. The channel is stdin. This (-MC) must be the last
2742 argument. There's a subsequent check that the real-uid is privileged.
2744 If we are running in the test harness. delay for a bit, to let the process
2745 that set this one up complete. This makes for repeatability of the logging,
2748 if (Ustrcmp(argrest, "C") == 0)
2750 union sockaddr_46 interface_sock;
2751 EXIM_SOCKLEN_T size = sizeof(interface_sock);
2754 exim_fail("exim: too many or too few arguments after -MC\n");
2756 if (msg_action_arg >= 0)
2757 exim_fail("exim: incompatible arguments\n");
2759 continue_transport = string_copy_taint(exim_str_fail_toolong(argv[++i], EXIM_DRIVERNAME_MAX, "-C internal transport"), TRUE);
2760 continue_hostname = string_copy_taint(exim_str_fail_toolong(argv[++i], EXIM_HOSTNAME_MAX, "-C internal hostname"), TRUE);
2761 continue_host_address = string_copy_taint(exim_str_fail_toolong(argv[++i], EXIM_IPADDR_MAX, "-C internal hostaddr"), TRUE);
2762 continue_sequence = Uatoi(argv[++i]);
2763 msg_action = MSG_DELIVER;
2764 msg_action_arg = ++i;
2765 forced_delivery = TRUE;
2766 queue_run_pid = passed_qr_pid;
2767 queue_run_pipe = passed_qr_pipe;
2769 if (!mac_ismsgid(argv[i]))
2770 exim_fail("exim: malformed message id %s after -MC option\n",
2773 /* Set up $sending_ip_address and $sending_port, unless proxied */
2775 if (!continue_proxy_cipher)
2776 if (getsockname(fileno(stdin), (struct sockaddr *)(&interface_sock),
2778 sending_ip_address = host_ntoa(-1, &interface_sock, NULL,
2781 exim_fail("exim: getsockname() failed after -MC option: %s\n",
2784 testharness_pause_ms(500);
2788 else if (*argrest == 'C' && argrest[1] && !argrest[2])
2792 /* -MCA: set the smtp_authenticated flag; this is useful only when it
2793 precedes -MC (see above). The flag indicates that the host to which
2794 Exim is connected has accepted an AUTH sequence. */
2796 case 'A': f.smtp_authenticated = TRUE; break;
2798 /* -MCD: set the smtp_use_dsn flag; this indicates that the host
2799 that exim is connected to supports the esmtp extension DSN */
2801 case 'D': smtp_peer_options |= OPTION_DSN; break;
2803 /* -MCd: for debug, set a process-purpose string */
2805 case 'd': if (++i < argc)
2806 process_purpose = string_copy_taint(exim_str_fail_toolong(argv[i], EXIM_DRIVERNAME_MAX, "-MCd"), TRUE);
2810 /* -MCG: set the queue name, to a non-default value. Arguably, anything
2811 from the commandline should be tainted - but we will need an untainted
2812 value for the spoolfile when doing a -odi delivery process. */
2814 case 'G': if (++i < argc) queue_name = string_copy_taint(exim_str_fail_toolong(argv[i], EXIM_DRIVERNAME_MAX, "-MCG"), FALSE);
2818 /* -MCK: the peer offered CHUNKING. Must precede -MC */
2820 case 'K': smtp_peer_options |= OPTION_CHUNKING; break;
2822 #ifdef EXPERIMENTAL_ESMTP_LIMITS
2823 /* -MCL: peer used LIMITS RCPTMAX and/or RCPTDOMAINMAX */
2824 case 'L': if (++i < argc) continue_limit_mail = Uatoi(argv[i]);
2826 if (++i < argc) continue_limit_rcpt = Uatoi(argv[i]);
2828 if (++i < argc) continue_limit_rcptdom = Uatoi(argv[i]);
2833 /* -MCP: set the smtp_use_pipelining flag; this is useful only when
2834 it preceded -MC (see above) */
2836 case 'P': smtp_peer_options |= OPTION_PIPE; break;
2838 #ifdef SUPPORT_SOCKS
2839 /* -MCp: Socks proxy in use; nearside IP, port, external IP, port */
2840 case 'p': proxy_session = TRUE;
2843 proxy_local_address = string_copy_taint(argv[i], TRUE);
2846 proxy_local_port = Uatoi(argv[i]);
2849 proxy_external_address = string_copy_taint(argv[i], TRUE);
2852 proxy_external_port = Uatoi(argv[i]);
2858 /* -MCQ: pass on the pid of the queue-running process that started
2859 this chain of deliveries and the fd of its synchronizing pipe; this
2860 is useful only when it precedes -MC (see above) */
2862 case 'Q': if (++i < argc) passed_qr_pid = (pid_t)(Uatol(argv[i]));
2864 if (++i < argc) passed_qr_pipe = (int)(Uatol(argv[i]));
2868 /* -MCq: do a quota check on the given recipient for the given size
2869 of message. Separate from -MC. */
2870 case 'q': rcpt_verify_quota = TRUE;
2871 if (++i < argc) message_size = Uatoi(argv[i]);
2875 /* -MCS: set the smtp_use_size flag; this is useful only when it
2876 precedes -MC (see above) */
2878 case 'S': smtp_peer_options |= OPTION_SIZE; break;
2881 /* -MCs: used with -MCt; SNI was sent */
2882 /* -MCr: ditto, DANE */
2885 case 's': if (++i < argc)
2887 continue_proxy_sni = string_copy_taint(exim_str_fail_toolong(argv[i], EXIM_HOSTNAME_MAX, "-MCr/-MCs"), TRUE);
2888 if (argrest[1] == 'r') continue_proxy_dane = TRUE;
2893 /* -MCt: similar to -MCT below but the connection is still open
2894 via a proxy process which handles the TLS context and coding.
2895 Require three arguments for the proxied local address and port,
2896 and the TLS cipher. */
2898 case 't': if (++i < argc)
2899 sending_ip_address = string_copy_taint(exim_str_fail_toolong(argv[i], EXIM_IPADDR_MAX, "-MCt IP"), TRUE);
2902 sending_port = (int)(Uatol(argv[i]));
2905 continue_proxy_cipher = string_copy_taint(exim_str_fail_toolong(argv[i], EXIM_CIPHERNAME_MAX, "-MCt cipher"), TRUE);
2909 /* -MCT: set the tls_offered flag; this is useful only when it
2910 precedes -MC (see above). The flag indicates that the host to which
2911 Exim is connected has offered TLS support. */
2913 case 'T': smtp_peer_options |= OPTION_TLS; break;
2916 default: badarg = TRUE; break;
2921 /* -M[x]: various operations on the following list of message ids:
2922 -M deliver the messages, ignoring next retry times and thawing
2923 -Mc deliver the messages, checking next retry times, no thawing
2924 -Mf freeze the messages
2925 -Mg give up on the messages
2926 -Mt thaw the messages
2927 -Mrm remove the messages
2928 In the above cases, this must be the last option. There are also the
2929 following options which are followed by a single message id, and which
2930 act on that message. Some of them use the "recipient" addresses as well.
2931 -Mar add recipient(s)
2932 -MG move to a different queue
2933 -Mmad mark all recipients delivered
2934 -Mmd mark recipients(s) delivered
2936 -Mset load a message for use with -be
2938 -Mvc show copy (of whole message, in RFC 2822 format)
2945 msg_action = MSG_DELIVER;
2946 forced_delivery = f.deliver_force_thaw = TRUE;
2948 else if (Ustrcmp(argrest, "ar") == 0)
2950 msg_action = MSG_ADD_RECIPIENT;
2951 one_msg_action = TRUE;
2953 else if (Ustrcmp(argrest, "c") == 0) msg_action = MSG_DELIVER;
2954 else if (Ustrcmp(argrest, "es") == 0)
2956 msg_action = MSG_EDIT_SENDER;
2957 one_msg_action = TRUE;
2959 else if (Ustrcmp(argrest, "f") == 0) msg_action = MSG_FREEZE;
2960 else if (Ustrcmp(argrest, "g") == 0)
2962 msg_action = MSG_DELIVER;
2963 deliver_give_up = TRUE;
2965 else if (Ustrcmp(argrest, "G") == 0)
2967 msg_action = MSG_SETQUEUE;
2968 queue_name_dest = string_copy_taint(exim_str_fail_toolong(argv[++i], EXIM_DRIVERNAME_MAX, "-MG"), TRUE);
2970 else if (Ustrcmp(argrest, "mad") == 0)
2972 msg_action = MSG_MARK_ALL_DELIVERED;
2974 else if (Ustrcmp(argrest, "md") == 0)
2976 msg_action = MSG_MARK_DELIVERED;
2977 one_msg_action = TRUE;
2979 else if (Ustrcmp(argrest, "rm") == 0) msg_action = MSG_REMOVE;
2980 else if (Ustrcmp(argrest, "set") == 0)
2982 msg_action = MSG_LOAD;
2983 one_msg_action = TRUE;
2985 else if (Ustrcmp(argrest, "t") == 0) msg_action = MSG_THAW;
2986 else if (Ustrcmp(argrest, "vb") == 0)
2988 msg_action = MSG_SHOW_BODY;
2989 one_msg_action = TRUE;
2991 else if (Ustrcmp(argrest, "vc") == 0)
2993 msg_action = MSG_SHOW_COPY;
2994 one_msg_action = TRUE;
2996 else if (Ustrcmp(argrest, "vh") == 0)
2998 msg_action = MSG_SHOW_HEADER;
2999 one_msg_action = TRUE;
3001 else if (Ustrcmp(argrest, "vl") == 0)
3003 msg_action = MSG_SHOW_LOG;
3004 one_msg_action = TRUE;
3006 else { badarg = TRUE; break; }
3008 /* All the -Mxx options require at least one message id. */
3010 msg_action_arg = i + 1;
3011 if (msg_action_arg >= argc)
3012 exim_fail("exim: no message ids given after %s option\n", arg);
3014 /* Some require only message ids to follow */
3016 if (!one_msg_action)
3018 for (int j = msg_action_arg; j < argc; j++) if (!mac_ismsgid(argv[j]))
3019 exim_fail("exim: malformed message id %s after %s option\n",
3021 goto END_ARG; /* Remaining args are ids */
3024 /* Others require only one message id, possibly followed by addresses,
3025 which will be handled as normal arguments. */
3029 if (!mac_ismsgid(argv[msg_action_arg]))
3030 exim_fail("exim: malformed message id %s after %s option\n",
3031 argv[msg_action_arg], arg);
3037 /* Some programs seem to call the -om option without the leading o;
3038 for sendmail it askes for "me too". Exim always does this. */
3041 if (*argrest) badarg = TRUE;
3045 /* -N: don't do delivery - a debugging option that stops transports doing
3046 their thing. It implies debugging at the D_v level. */
3051 f.dont_deliver = TRUE;
3052 debug_selector |= D_v;
3053 debug_file = stderr;
3059 /* -n: This means "don't alias" in sendmail, apparently.
3060 For normal invocations, it has no effect.
3061 It may affect some other options. */
3067 /* -O: Just ignore it. In sendmail, apparently -O option=value means set
3068 option to the specified value. This form uses long names. We need to handle
3069 -O option=value and -Ooption=value. */
3074 exim_fail("exim: string expected after -O\n");
3080 /* -oA: Set an argument for the bi command (sendmail's "alternate alias
3083 if (!*(alias_arg = argrest))
3084 if (i+1 < argc) alias_arg = argv[++i];
3085 else exim_fail("exim: string expected after -oA\n");
3088 /* -oB: Set a connection message max value for remote deliveries */
3091 uschar * p = argrest;
3093 if (i+1 < argc && isdigit((argv[i+1][0])))
3097 connection_max_messages = 1;
3104 exim_fail("exim: number expected after -oB\n");
3105 connection_max_messages = Uatoi(p);
3110 /* -odb: background delivery */
3113 if (Ustrcmp(argrest, "b") == 0)
3115 f.synchronous_delivery = FALSE;
3116 arg_queue_only = FALSE;
3117 queue_only_set = TRUE;
3120 /* -odd: testsuite-only: add no inter-process delays */
3122 else if (Ustrcmp(argrest, "d") == 0)
3123 f.testsuite_delays = FALSE;
3125 /* -odf: foreground delivery (smail-compatible option); same effect as
3126 -odi: interactive (synchronous) delivery (sendmail-compatible option)
3129 else if (Ustrcmp(argrest, "f") == 0 || Ustrcmp(argrest, "i") == 0)
3131 f.synchronous_delivery = TRUE;
3132 arg_queue_only = FALSE;
3133 queue_only_set = TRUE;
3136 /* -odq: queue only */
3138 else if (Ustrcmp(argrest, "q") == 0)
3140 f.synchronous_delivery = FALSE;
3141 arg_queue_only = TRUE;
3142 queue_only_set = TRUE;
3145 /* -odqs: queue SMTP only - do local deliveries and remote routing,
3146 but no remote delivery */
3148 else if (Ustrcmp(argrest, "qs") == 0)
3150 f.queue_smtp = TRUE;
3151 arg_queue_only = FALSE;
3152 queue_only_set = TRUE;
3157 /* -oex: Sendmail error flags. As these are also accepted without the
3158 leading -o prefix, for compatibility with vacation and other callers,
3159 they are handled with -e above. */
3161 /* -oi: Set flag so dot doesn't end non-SMTP input (same as -i)
3162 -oitrue: Another sendmail syntax for the same */
3165 if (!*argrest || Ustrcmp(argrest, "true") == 0)
3170 /* -oM*: Set various characteristics for an incoming message; actually
3171 acted on for trusted callers only. */
3176 exim_fail("exim: data expected after -oM%s\n", argrest);
3178 /* -oMa: Set sender host address */
3180 if (Ustrcmp(argrest, "a") == 0)
3181 sender_host_address = string_copy_taint(exim_str_fail_toolong(argv[++i], EXIM_IPADDR_MAX, "-oMa"), TRUE);
3183 /* -oMaa: Set authenticator name */
3185 else if (Ustrcmp(argrest, "aa") == 0)
3186 sender_host_authenticated = string_copy_taint(exim_str_fail_toolong(argv[++i], EXIM_DRIVERNAME_MAX, "-oMaa"), TRUE);
3188 /* -oMas: setting authenticated sender */
3190 else if (Ustrcmp(argrest, "as") == 0)
3191 authenticated_sender = string_copy_taint(exim_str_fail_toolong(argv[++i], EXIM_EMAILADDR_MAX, "-oMas"), TRUE);
3193 /* -oMai: setting authenticated id */
3195 else if (Ustrcmp(argrest, "ai") == 0)
3196 authenticated_id = string_copy_taint(exim_str_fail_toolong(argv[++i], EXIM_EMAILADDR_MAX, "-oMas"), TRUE);
3198 /* -oMi: Set incoming interface address */
3200 else if (Ustrcmp(argrest, "i") == 0)
3201 interface_address = string_copy_taint(exim_str_fail_toolong(argv[++i], EXIM_IPADDR_MAX, "-oMi"), TRUE);
3203 /* -oMm: Message reference */
3205 else if (Ustrcmp(argrest, "m") == 0)
3207 if (!mac_ismsgid(argv[i+1]))
3208 exim_fail("-oMm must be a valid message ID\n");
3209 if (!f.trusted_config)
3210 exim_fail("-oMm must be called by a trusted user/config\n");
3211 message_reference = argv[++i];
3214 /* -oMr: Received protocol */
3216 else if (Ustrcmp(argrest, "r") == 0)
3218 if (received_protocol)
3219 exim_fail("received_protocol is set already\n");
3221 received_protocol = string_copy_taint(exim_str_fail_toolong(argv[++i], EXIM_DRIVERNAME_MAX, "-oMr"), TRUE);
3223 /* -oMs: Set sender host name */
3225 else if (Ustrcmp(argrest, "s") == 0)
3226 sender_host_name = string_copy_taint(exim_str_fail_toolong(argv[++i], EXIM_HOSTNAME_MAX, "-oMs"), TRUE);
3228 /* -oMt: Set sender ident */
3230 else if (Ustrcmp(argrest, "t") == 0)
3232 sender_ident_set = TRUE;
3233 sender_ident = string_copy_taint(exim_str_fail_toolong(argv[++i], EXIM_IDENTUSER_MAX, "-oMt"), TRUE);
3236 /* Else a bad argument */
3243 /* -om: Me-too flag for aliases. Exim always does this. Some programs
3244 seem to call this as -m (undocumented), so that is also accepted (see
3246 /* -oo: An ancient flag for old-style addresses which still seems to
3247 crop up in some calls (see in SCO). */
3251 if (*argrest) badarg = TRUE;
3254 /* -oP <name>: set pid file path for daemon
3255 -oPX: delete pid file of daemon */
3258 if (!*argrest) override_pid_file_path = argv[++i];
3259 else if (Ustrcmp(argrest, "X") == 0) delete_pid_file();
3264 /* -or <n>: set timeout for non-SMTP acceptance
3265 -os <n>: set timeout for SMTP acceptance */
3270 int * tp = argrest[-1] == 'r'
3271 ? &arg_receive_timeout : &arg_smtp_receive_timeout;
3273 *tp = readconf_readtime(argrest, 0, FALSE);
3274 else if (i+1 < argc)
3275 *tp = readconf_readtime(argv[++i], 0, FALSE);
3278 exim_fail("exim: bad time value %s: abandoned\n", argv[i]);
3282 /* -oX <list>: Override local_interfaces and/or default daemon ports */
3283 /* Limits: Is there a real limit we want here? 1024 is very arbitrary. */
3286 if (*argrest) badarg = TRUE;
3287 else override_local_interfaces = string_copy_taint(exim_str_fail_toolong(argv[++i], 1024, "-oX", TRUE);
3290 /* -oY: Override creation of daemon notifier socket */
3293 if (*argrest) badarg = TRUE;
3294 else notifier_socket = NULL;
3297 /* Unknown -o argument */
3305 /* -ps: force Perl startup; -pd force delayed Perl startup */
3309 if (*argrest == 's' && argrest[1] == 0)
3311 perl_start_option = 1;
3314 if (*argrest == 'd' && argrest[1] == 0)
3316 perl_start_option = -1;
3321 /* -panythingelse is taken as the Sendmail-compatible argument -prval:sval,
3322 which sets the host protocol and host name */
3325 if (i+1 < argc) argrest = argv[++i]; else { badarg = TRUE; break; }
3329 uschar * hn = Ustrchr(argrest, ':');
3331 if (received_protocol)
3332 exim_fail("received_protocol is set already\n");
3335 received_protocol = string_copy_taint(exim_str_fail_toolong(argrest, EXIM_DRIVERNAME_MAX, "-p<protocol>"), TRUE);
3338 (void) exim_str_fail_toolong(argrest, (EXIM_DRIVERNAME_MAX+1+EXIM_HOSTNAME_MAX), "-p<protocol>:<host>");
3339 received_protocol = string_copyn_taint(argrest, hn - argrest, TRUE);
3340 sender_host_name = string_copy_taint(hn + 1, TRUE);
3347 receiving_message = FALSE;
3348 if (queue_interval >= 0)
3349 exim_fail("exim: -q specified more than once\n");
3351 /* -qq...: Do queue runs in a 2-stage manner */
3353 if (*argrest == 'q')
3355 f.queue_2stage = TRUE;
3359 /* -qi...: Do only first (initial) deliveries */
3361 if (*argrest == 'i')
3363 f.queue_run_first_delivery = TRUE;
3367 /* -qf...: Run the queue, forcing deliveries
3368 -qff..: Ditto, forcing thawing as well */
3370 if (*argrest == 'f')
3372 f.queue_run_force = TRUE;
3373 if (*++argrest == 'f')
3375 f.deliver_force_thaw = TRUE;
3380 /* -q[f][f]l...: Run the queue only on local deliveries */
3382 if (*argrest == 'l')
3384 f.queue_run_local = TRUE;
3388 /* -q[f][f][l][G<name>]... Work on the named queue */
3390 if (*argrest == 'G')
3393 for (argrest++, i = 0; argrest[i] && argrest[i] != '/'; ) i++;
3394 exim_len_fail_toolong(i, EXIM_DRIVERNAME_MAX, "-q*G<name>");
3395 queue_name = string_copyn(argrest, i);
3397 if (*argrest == '/') argrest++;
3400 /* -q[f][f][l][G<name>]: Run the queue, optionally forced, optionally local
3401 only, optionally named, optionally starting from a given message id. */
3403 if (!(list_queue || count_queue))
3405 && (i + 1 >= argc || argv[i+1][0] == '-' || mac_ismsgid(argv[i+1])))
3408 if (i+1 < argc && mac_ismsgid(argv[i+1]))
3409 start_queue_run_id = string_copy_taint(argv[++i], TRUE);
3410 if (i+1 < argc && mac_ismsgid(argv[i+1]))
3411 stop_queue_run_id = string_copy_taint(argv[++i], TRUE);
3414 /* -q[f][f][l][G<name>/]<n>: Run the queue at regular intervals, optionally
3415 forced, optionally local only, optionally named. */
3417 else if ((queue_interval = readconf_readtime(*argrest ? argrest : argv[++i],
3419 exim_fail("exim: bad time value %s: abandoned\n", argv[i]);
3423 case 'R': /* Synonymous with -qR... */
3424 receiving_message = FALSE;
3426 /* -Rf: As -R (below) but force all deliveries,
3427 -Rff: Ditto, but also thaw all frozen messages,
3428 -Rr: String is regex
3429 -Rrf: Regex and force
3430 -Rrff: Regex and force and thaw
3432 in all cases provided there are no further characters in this
3436 for (int i = 0; i < nelem(rsopts); i++)
3437 if (Ustrcmp(argrest, rsopts[i]) == 0)
3439 if (i != 2) f.queue_run_force = TRUE;
3440 if (i >= 2) f.deliver_selectstring_regex = TRUE;
3441 if (i == 1 || i == 4) f.deliver_force_thaw = TRUE;
3442 argrest += Ustrlen(rsopts[i]);
3445 /* -R: Set string to match in addresses for forced queue run to
3446 pick out particular messages. */
3448 /* Avoid attacks from people providing very long strings, and do so before
3450 const char *tainted_selectstr;
3452 tainted_selectstr = argrest;
3453 else if (i+1 < argc)
3454 tainted_selectstr = argv[++i];
3456 exim_fail("exim: string expected after -R\n");
3457 deliver_selectstring = string_copy_taint(exim_str_fail_toolong(tainted_selectstr, EXIM_EMAILADDR_MAX, "-R"), TRUE);
3460 /* -r: an obsolete synonym for -f (see above) */
3463 /* -S: Like -R but works on sender. */
3465 case 'S': /* Synonymous with -qS... */
3466 receiving_message = FALSE;
3468 /* -Sf: As -S (below) but force all deliveries,
3469 -Sff: Ditto, but also thaw all frozen messages,
3470 -Sr: String is regex
3471 -Srf: Regex and force
3472 -Srff: Regex and force and thaw
3474 in all cases provided there are no further characters in this
3478 for (int i = 0; i < nelem(rsopts); i++)
3479 if (Ustrcmp(argrest, rsopts[i]) == 0)
3481 if (i != 2) f.queue_run_force = TRUE;
3482 if (i >= 2) f.deliver_selectstring_sender_regex = TRUE;
3483 if (i == 1 || i == 4) f.deliver_force_thaw = TRUE;
3484 argrest += Ustrlen(rsopts[i]);
3487 /* -S: Set string to match in addresses for forced queue run to
3488 pick out particular messages. */
3490 const char *tainted_selectstr;
3492 tainted_selectstr = argrest;
3493 else if (i+1 < argc)
3494 tainted_selectstr = argv[++i];
3496 exim_fail("exim: string expected after -S\n");
3497 deliver_selectstring_sender = string_copy_taint(exim_str_fail_toolong(tainted_selectstr, EXIM_EMAILADDR_MAX, "-S"), TRUE);
3500 /* -Tqt is an option that is exclusively for use by the testing suite.
3501 It is not recognized in other circumstances. It allows for the setting up
3502 of explicit "queue times" so that various warning/retry things can be
3503 tested. Otherwise variability of clock ticks etc. cause problems. */
3506 if (f.running_in_test_harness && Ustrcmp(argrest, "qt") == 0)
3507 fudged_queue_times = string_copy_taint(argv[++i], TRUE);
3512 /* -t: Set flag to extract recipients from body of message. */
3515 if (!*argrest) extract_recipients = TRUE;
3517 /* -ti: Set flag to extract recipients from body of message, and also
3518 specify that dot does not end the message. */
3520 else if (Ustrcmp(argrest, "i") == 0)
3522 extract_recipients = TRUE;
3526 /* -tls-on-connect: don't wait for STARTTLS (for old clients) */
3529 else if (Ustrcmp(argrest, "ls-on-connect") == 0) tls_in.on_connect = TRUE;
3536 /* -U: This means "initial user submission" in sendmail, apparently. The
3537 doc claims that in future sendmail may refuse syntactically invalid
3538 messages instead of fixing them. For the moment, we just ignore it. */
3544 /* -v: verify things - this is a very low-level debugging */
3549 debug_selector |= D_v;
3550 debug_file = stderr;
3556 /* -x: AIX uses this to indicate some fancy 8-bit character stuff:
3558 The -x flag tells the sendmail command that mail from a local
3559 mail program has National Language Support (NLS) extended characters
3560 in the body of the mail item. The sendmail command can send mail with
3561 extended NLS characters across networks that normally corrupts these
3564 As Exim is 8-bit clean, it just ignores this flag. */
3567 if (*argrest) badarg = TRUE;
3570 /* -X: in sendmail: takes one parameter, logfile, and sends debugging
3571 logs to that file. We swallow the parameter and otherwise ignore it. */
3576 exim_fail("exim: string expected after -X\n");
3579 /* -z: a line of text to log */
3584 log_oneline = string_copy_taint(exim_str_fail_toolong(argv[i], 2048, "-z logtext"), TRUE);
3586 exim_fail("exim: file name expected after %s\n", argv[i-1]);
3589 /* All other initial characters are errors */
3594 } /* End of high-level switch statement */
3596 /* Failed to recognize the option, or syntax error */
3599 exim_fail("exim abandoned: unknown, malformed, or incomplete "
3600 "option %s\n", arg);
3604 /* If -R or -S have been specified without -q, assume a single queue run. */
3606 if ( (deliver_selectstring || deliver_selectstring_sender)
3607 && queue_interval < 0)
3612 store_pool = old_pool;
3615 /* If usage_wanted is set we call the usage function - which never returns */
3616 if (usage_wanted) exim_usage(called_as);
3618 /* Arguments have been processed. Check for incompatibilities. */
3619 if ( ( (smtp_input || extract_recipients || recipients_arg < argc)
3620 && ( f.daemon_listen || queue_interval >= 0 || bi_option
3621 || test_retry_arg >= 0 || test_rewrite_arg >= 0
3622 || filter_test != FTEST_NONE
3623 || msg_action_arg > 0 && !one_msg_action
3625 || ( msg_action_arg > 0
3626 && ( f.daemon_listen || queue_interval > 0 || list_options
3627 || checking && msg_action != MSG_LOAD
3628 || bi_option || test_retry_arg >= 0 || test_rewrite_arg >= 0
3630 || ( (f.daemon_listen || queue_interval > 0)
3631 && ( sender_address || list_options || list_queue || checking
3634 || f.daemon_listen && queue_interval == 0
3635 || f.inetd_wait_mode && queue_interval >= 0
3637 && ( checking || smtp_input || extract_recipients
3638 || filter_test != FTEST_NONE || bi_option
3640 || ( verify_address_mode
3641 && ( f.address_test_mode || smtp_input || extract_recipients
3642 || filter_test != FTEST_NONE || bi_option
3644 || ( f.address_test_mode
3645 && ( smtp_input || extract_recipients || filter_test != FTEST_NONE
3649 && (sender_address || filter_test != FTEST_NONE || extract_recipients)
3651 || deliver_selectstring && queue_interval < 0
3652 || msg_action == MSG_LOAD && (!expansion_test || expansion_test_message)
3654 exim_fail("exim: incompatible command-line options or arguments\n");
3656 /* If debugging is set up, set the file and the file descriptor to pass on to
3657 child processes. It should, of course, be 2 for stderr. Also, force the daemon
3658 to run in the foreground. */
3660 if (debug_selector != 0)
3662 debug_file = stderr;
3663 debug_fd = fileno(debug_file);
3664 f.background_daemon = FALSE;
3665 testharness_pause_ms(100); /* lets caller finish */
3666 if (debug_selector != D_v) /* -v only doesn't show this */
3668 debug_printf("Exim version %s uid=%ld gid=%ld pid=%d D=%x\n",
3669 version_string, (long int)real_uid, (long int)real_gid, (int)getpid(),
3671 if (!version_printed)
3672 show_whats_supported(stderr);
3676 /* When started with root privilege, ensure that the limits on the number of
3677 open files and the number of processes (where that is accessible) are
3678 sufficiently large, or are unset, in case Exim has been called from an
3679 environment where the limits are screwed down. Not all OS have the ability to
3680 change some of these limits. */
3684 DEBUG(D_any) debug_print_ids(US"Exim has no root privilege:");
3690 #ifdef RLIMIT_NOFILE
3691 if (getrlimit(RLIMIT_NOFILE, &rlp) < 0)
3693 log_write(0, LOG_MAIN|LOG_PANIC, "getrlimit(RLIMIT_NOFILE) failed: %s",
3695 rlp.rlim_cur = rlp.rlim_max = 0;
3698 /* I originally chose 1000 as a nice big number that was unlikely to
3699 be exceeded. It turns out that some older OS have a fixed upper limit of
3702 if (rlp.rlim_cur < 1000)
3704 rlp.rlim_cur = rlp.rlim_max = 1000;
3705 if (setrlimit(RLIMIT_NOFILE, &rlp) < 0)
3707 rlp.rlim_cur = rlp.rlim_max = 256;
3708 if (setrlimit(RLIMIT_NOFILE, &rlp) < 0)
3709 log_write(0, LOG_MAIN|LOG_PANIC, "setrlimit(RLIMIT_NOFILE) failed: %s",
3716 if (getrlimit(RLIMIT_NPROC, &rlp) < 0)
3718 log_write(0, LOG_MAIN|LOG_PANIC, "getrlimit(RLIMIT_NPROC) failed: %s",
3720 rlp.rlim_cur = rlp.rlim_max = 0;
3723 #ifdef RLIM_INFINITY
3724 if (rlp.rlim_cur != RLIM_INFINITY && rlp.rlim_cur < 1000)
3726 rlp.rlim_cur = rlp.rlim_max = RLIM_INFINITY;
3728 if (rlp.rlim_cur < 1000)
3730 rlp.rlim_cur = rlp.rlim_max = 1000;
3732 if (setrlimit(RLIMIT_NPROC, &rlp) < 0)
3733 log_write(0, LOG_MAIN|LOG_PANIC, "setrlimit(RLIMIT_NPROC) failed: %s",
3739 /* Exim is normally entered as root (but some special configurations are
3740 possible that don't do this). However, it always spins off sub-processes that
3741 set their uid and gid as required for local delivery. We don't want to pass on
3742 any extra groups that root may belong to, so we want to get rid of them all at
3745 We need to obey setgroups() at this stage, before possibly giving up root
3746 privilege for a changed configuration file, but later on we might need to
3747 check on the additional groups for the admin user privilege - can't do that
3748 till after reading the config, which might specify the exim gid. Therefore,
3749 save the group list here first. */
3751 if ((group_count = getgroups(nelem(group_list), group_list)) < 0)
3752 exim_fail("exim: getgroups() failed: %s\n", strerror(errno));
3754 /* There is a fundamental difference in some BSD systems in the matter of
3755 groups. FreeBSD and BSDI are known to be different; NetBSD and OpenBSD are
3756 known not to be different. On the "different" systems there is a single group
3757 list, and the first entry in it is the current group. On all other versions of
3758 Unix there is a supplementary group list, which is in *addition* to the current
3759 group. Consequently, to get rid of all extraneous groups on a "standard" system
3760 you pass over 0 groups to setgroups(), while on a "different" system you pass
3761 over a single group - the current group, which is always the first group in the
3762 list. Calling setgroups() with zero groups on a "different" system results in
3763 an error return. The following code should cope with both types of system.
3765 Unfortunately, recent MacOS, which should be a FreeBSD, "helpfully" succeeds
3766 the "setgroups() with zero groups" - and changes the egid.
3767 Thanks to that we had to stash the original_egid above, for use below
3768 in the call to exim_setugid().
3770 However, if this process isn't running as root, setgroups() can't be used
3771 since you have to be root to run it, even if throwing away groups.
3772 Except, sigh, for Hurd - where you can.
3773 Not being root here happens only in some unusual configurations. */
3776 #ifndef OS_SETGROUPS_ZERO_DROPS_ALL
3777 && setgroups(0, NULL) != 0
3779 && setgroups(1, group_list) != 0)
3780 exim_fail("exim: setgroups() failed: %s\n", strerror(errno));
3782 /* If the configuration file name has been altered by an argument on the
3783 command line (either a new file name or a macro definition) and the caller is
3784 not root, or if this is a filter testing run, remove any setuid privilege the
3785 program has and run as the underlying user.
3787 The exim user is locked out of this, which severely restricts the use of -C
3790 Otherwise, set the real ids to the effective values (should be root unless run
3791 from inetd, which it can either be root or the exim uid, if one is configured).
3793 There is a private mechanism for bypassing some of this, in order to make it
3794 possible to test lots of configurations automatically, without having either to
3795 recompile each time, or to patch in an actual configuration file name and other
3796 values (such as the path name). If running in the test harness, pretend that
3797 configuration file changes and macro definitions haven't happened. */
3800 (!f.trusted_config || /* Config changed, or */
3801 !macros_trusted(opt_D_used)) && /* impermissible macros and */
3802 real_uid != root_uid && /* Not root, and */
3803 !f.running_in_test_harness /* Not fudged */
3805 expansion_test /* expansion testing */
3807 filter_test != FTEST_NONE) /* Filter testing */
3809 setgroups(group_count, group_list);
3810 exim_setugid(real_uid, real_gid, FALSE,
3811 US"-C, -D, -be or -bf forces real uid");
3812 removed_privilege = TRUE;
3814 /* In the normal case when Exim is called like this, stderr is available
3815 and should be used for any logging information because attempts to write
3816 to the log will usually fail. To arrange this, we unset really_exim. However,
3817 if no stderr is available there is no point - we might as well have a go
3818 at the log (if it fails, syslog will be written).
3820 Note that if the invoker is Exim, the logs remain available. Messing with
3821 this causes unlogged successful deliveries. */
3823 if (log_stderr && real_uid != exim_uid)
3824 f.really_exim = FALSE;
3827 /* Privilege is to be retained for the moment. It may be dropped later,
3828 depending on the job that this Exim process has been asked to do. For now, set
3829 the real uid to the effective so that subsequent re-execs of Exim are done by a
3833 exim_setugid(geteuid(), original_egid, FALSE, US"forcing real = effective");
3835 /* If testing a filter, open the file(s) now, before wasting time doing other
3836 setups and reading the message. */
3838 if (filter_test & FTEST_SYSTEM)
3839 if ((filter_sfd = Uopen(filter_test_sfile, O_RDONLY, 0)) < 0)
3840 exim_fail("exim: failed to open %s: %s\n", filter_test_sfile,
3843 if (filter_test & FTEST_USER)
3844 if ((filter_ufd = Uopen(filter_test_ufile, O_RDONLY, 0)) < 0)
3845 exim_fail("exim: failed to open %s: %s\n", filter_test_ufile,
3848 /* Initialise lookup_list
3849 If debugging, already called above via version reporting.
3850 In either case, we initialise the list of available lookups while running
3851 as root. All dynamically modules are loaded from a directory which is
3852 hard-coded into the binary and is code which, if not a module, would be
3853 part of Exim already. Ability to modify the content of the directory
3854 is equivalent to the ability to modify a setuid binary!
3856 This needs to happen before we read the main configuration. */
3860 if (f.running_in_test_harness) smtputf8_advertise_hosts = NULL;
3863 /* Read the main runtime configuration data; this gives up if there
3864 is a failure. It leaves the configuration file open so that the subsequent
3865 configuration data for delivery can be read if needed.
3867 NOTE: immediately after opening the configuration file we change the working
3868 directory to "/"! Later we change to $spool_directory. We do it there, because
3869 during readconf_main() some expansion takes place already. */
3871 /* Store the initial cwd before we change directories. Can be NULL if the
3872 dir has already been unlinked. */
3873 initial_cwd = os_getcwd(NULL, 0);
3876 -be[m] expansion test -
3877 -b[fF] filter test new
3879 -bmalware malware_test_file new
3881 -brw rewrite test new
3883 -bv[s] address verify -
3885 -bP <option> (except -bP config, which sets list_config)
3887 If any of these options is set, we suppress warnings about configuration
3888 issues (currently about tls_advertise_hosts and keep_environment not being
3892 #ifdef MEASURE_TIMING
3893 struct timeval t0, diff;
3894 (void)gettimeofday(&t0, NULL);
3897 readconf_main(checking || list_options);
3899 #ifdef MEASURE_TIMING
3900 report_time_since(&t0, US"readconf_main (delta)");
3905 /* Now in directory "/" */
3907 if (cleanup_environment() == FALSE)
3908 log_write(0, LOG_PANIC_DIE, "Can't cleanup environment");
3911 /* If an action on specific messages is requested, or if a daemon or queue
3912 runner is being started, we need to know if Exim was called by an admin user.
3913 This is the case if the real user is root or exim, or if the real group is
3914 exim, or if one of the supplementary groups is exim or a group listed in
3915 admin_groups. We don't fail all message actions immediately if not admin_user,
3916 since some actions can be performed by non-admin users. Instead, set admin_user
3917 for later interrogation. */
3919 if (real_uid == root_uid || real_uid == exim_uid || real_gid == exim_gid)
3920 f.admin_user = TRUE;
3922 for (int i = 0; i < group_count && !f.admin_user; i++)
3923 if (group_list[i] == exim_gid)
3924 f.admin_user = TRUE;
3925 else if (admin_groups)
3926 for (int j = 1; j <= (int)admin_groups[0] && !f.admin_user; j++)
3927 if (admin_groups[j] == group_list[i])
3928 f.admin_user = TRUE;
3930 /* Another group of privileged users are the trusted users. These are root,
3931 exim, and any caller matching trusted_users or trusted_groups. Trusted callers
3932 are permitted to specify sender_addresses with -f on the command line, and
3933 other message parameters as well. */
3935 if (real_uid == root_uid || real_uid == exim_uid)
3936 f.trusted_caller = TRUE;
3940 for (int i = 1; i <= (int)trusted_users[0] && !f.trusted_caller; i++)
3941 if (trusted_users[i] == real_uid)
3942 f.trusted_caller = TRUE;
3945 for (int i = 1; i <= (int)trusted_groups[0] && !f.trusted_caller; i++)
3946 if (trusted_groups[i] == real_gid)
3947 f.trusted_caller = TRUE;
3948 else for (int j = 0; j < group_count && !f.trusted_caller; j++)
3949 if (trusted_groups[i] == group_list[j])
3950 f.trusted_caller = TRUE;
3953 /* At this point, we know if the user is privileged and some command-line
3954 options become possibly impermissible, depending upon the configuration file. */
3956 if (checking && commandline_checks_require_admin && !f.admin_user)
3957 exim_fail("exim: those command-line flags are set to require admin\n");
3959 /* Handle the decoding of logging options. */
3961 decode_bits(log_selector, log_selector_size, log_notall,
3962 log_selector_string, log_options, log_options_count, US"log", 0);
3966 debug_printf("configuration file is %s\n", config_main_filename);
3967 debug_printf("log selectors =");
3968 for (int i = 0; i < log_selector_size; i++)
3969 debug_printf(" %08x", log_selector[i]);
3973 /* If domain literals are not allowed, check the sender address that was
3974 supplied with -f. Ditto for a stripped trailing dot. */
3978 if (sender_address[sender_address_domain] == '[' && !allow_domain_literals)
3979 exim_fail("exim: bad -f address \"%s\": domain literals not "
3980 "allowed\n", sender_address);
3981 if (f_end_dot && !strip_trailing_dot)
3982 exim_fail("exim: bad -f address \"%s.\": domain is malformed "
3983 "(trailing dot not allowed)\n", sender_address);
3986 /* See if an admin user overrode our logging. */
3988 if (cmdline_syslog_name)
3991 syslog_processname = cmdline_syslog_name;
3992 log_file_path = string_copy(CUS"syslog");
3995 /* not a panic, non-privileged users should not be able to spam paniclog */
3997 "exim: you lack sufficient privilege to specify syslog process name\n");
3999 /* Paranoia check of maximum lengths of certain strings. There is a check
4000 on the length of the log file path in log.c, which will come into effect
4001 if there are any calls to write the log earlier than this. However, if we
4002 get this far but the string is very long, it is better to stop now than to
4003 carry on and (e.g.) receive a message and then have to collapse. The call to
4004 log_write() from here will cause the ultimate panic collapse if the complete
4005 file name exceeds the buffer length. */
4007 if (Ustrlen(log_file_path) > 200)
4008 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
4009 "log_file_path is longer than 200 chars: aborting");
4011 if (Ustrlen(pid_file_path) > 200)
4012 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
4013 "pid_file_path is longer than 200 chars: aborting");
4015 if (Ustrlen(spool_directory) > 200)
4016 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
4017 "spool_directory is longer than 200 chars: aborting");
4019 /* Length check on the process name given to syslog for its TAG field,
4020 which is only permitted to be 32 characters or less. See RFC 3164. */
4022 if (Ustrlen(syslog_processname) > 32)
4023 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
4024 "syslog_processname is longer than 32 chars: aborting");
4029 log_write(0, LOG_MAIN, "%s", log_oneline);
4030 return EXIT_SUCCESS;
4033 return EXIT_FAILURE;
4035 /* In some operating systems, the environment variable TMPDIR controls where
4036 temporary files are created; Exim doesn't use these (apart from when delivering
4037 to MBX mailboxes), but called libraries such as DBM libraries may require them.
4038 If TMPDIR is found in the environment, reset it to the value defined in the
4039 EXIM_TMPDIR macro, if this macro is defined. For backward compatibility this
4040 macro may be called TMPDIR in old "Local/Makefile"s. It's converted to
4041 EXIM_TMPDIR by the build scripts.
4045 if (environ) for (uschar ** p = USS environ; *p; p++)
4046 if (Ustrncmp(*p, "TMPDIR=", 7) == 0 && Ustrcmp(*p+7, EXIM_TMPDIR) != 0)
4048 uschar * newp = store_malloc(Ustrlen(EXIM_TMPDIR) + 8);
4049 sprintf(CS newp, "TMPDIR=%s", EXIM_TMPDIR);
4051 DEBUG(D_any) debug_printf("reset TMPDIR=%s in environment\n", EXIM_TMPDIR);
4055 /* Timezone handling. If timezone_string is "utc", set a flag to cause all
4056 timestamps to be in UTC (gmtime() is used instead of localtime()). Otherwise,
4057 we may need to get rid of a bogus timezone setting. This can arise when Exim is
4058 called by a user who has set the TZ variable. This then affects the timestamps
4059 in log files and in Received: headers, and any created Date: header lines. The
4060 required timezone is settable in the configuration file, so nothing can be done
4061 about this earlier - but hopefully nothing will normally be logged earlier than
4062 this. We have to make a new environment if TZ is wrong, but don't bother if
4063 timestamps_utc is set, because then all times are in UTC anyway. */
4065 if (timezone_string && strcmpic(timezone_string, US"UTC") == 0)
4066 f.timestamps_utc = TRUE;
4069 uschar *envtz = US getenv("TZ");
4071 ? !timezone_string || Ustrcmp(timezone_string, envtz) != 0
4072 : timezone_string != NULL
4075 uschar **p = USS environ;
4079 if (environ) while (*p++) count++;
4080 if (!envtz) count++;
4081 newp = new = store_malloc(sizeof(uschar *) * (count + 1));
4082 if (environ) for (p = USS environ; *p; p++)
4083 if (Ustrncmp(*p, "TZ=", 3) != 0) *newp++ = *p;
4084 if (timezone_string)
4086 *newp = store_malloc(Ustrlen(timezone_string) + 4);
4087 sprintf(CS *newp++, "TZ=%s", timezone_string);
4092 DEBUG(D_any) debug_printf("Reset TZ to %s: time is %s\n", timezone_string,
4093 tod_stamp(tod_log));
4097 /* Handle the case when we have removed the setuid privilege because of -C or
4098 -D. This means that the caller of Exim was not root.
4100 There is a problem if we were running as the Exim user. The sysadmin may
4101 expect this case to retain privilege because "the binary was called by the
4102 Exim user", but it hasn't, because either the -D option set macros, or the
4103 -C option set a non-trusted configuration file. There are two possibilities:
4105 (1) If deliver_drop_privilege is set, Exim is not going to re-exec in order
4106 to do message deliveries. Thus, the fact that it is running as a
4107 non-privileged user is plausible, and might be wanted in some special
4108 configurations. However, really_exim will have been set false when
4109 privilege was dropped, to stop Exim trying to write to its normal log
4110 files. Therefore, re-enable normal log processing, assuming the sysadmin
4111 has set up the log directory correctly.
4113 (2) If deliver_drop_privilege is not set, the configuration won't work as
4114 apparently intended, and so we log a panic message. In order to retain
4115 root for -C or -D, the caller must either be root or be invoking a
4116 trusted configuration file (when deliver_drop_privilege is false). */
4118 if ( removed_privilege
4119 && (!f.trusted_config || opt_D_used)
4120 && real_uid == exim_uid)
4121 if (deliver_drop_privilege)
4122 f.really_exim = TRUE; /* let logging work normally */
4124 log_write(0, LOG_MAIN|LOG_PANIC,
4125 "exim user lost privilege for using %s option",
4126 f.trusted_config? "-D" : "-C");
4128 /* Start up Perl interpreter if Perl support is configured and there is a
4129 perl_startup option, and the configuration or the command line specifies
4130 initializing starting. Note that the global variables are actually called
4131 opt_perl_xxx to avoid clashing with perl's namespace (perl_*). */
4134 if (perl_start_option != 0)
4135 opt_perl_at_start = (perl_start_option > 0);
4136 if (opt_perl_at_start && opt_perl_startup != NULL)
4139 DEBUG(D_any) debug_printf("Starting Perl interpreter\n");
4140 if ((errstr = init_perl(opt_perl_startup)))
4141 exim_fail("exim: error in perl_startup code: %s\n", errstr);
4142 opt_perl_started = TRUE;
4144 #endif /* EXIM_PERL */
4146 /* Log the arguments of the call if the configuration file said so. This is
4147 a debugging feature for finding out what arguments certain MUAs actually use.
4148 Don't attempt it if logging is disabled, or if listing variables or if
4149 verifying/testing addresses or expansions. */
4151 if ( (debug_selector & D_any || LOGGING(arguments))
4152 && f.really_exim && !list_options && !checking)
4154 uschar *p = big_buffer;
4155 Ustrcpy(p, US"cwd= (failed)");
4161 Ustrncpy(p + 4, initial_cwd, big_buffer_size-5);
4162 p += 4 + Ustrlen(initial_cwd);
4163 /* in case p is near the end and we don't provide enough space for
4164 * string_format to be willing to write. */
4168 (void)string_format(p, big_buffer_size - (p - big_buffer), " %d args:", argc);
4170 for (int i = 0; i < argc; i++)
4172 int len = Ustrlen(argv[i]);
4173 const uschar *printing;
4175 if (p + len + 8 >= big_buffer + big_buffer_size)
4177 Ustrcpy(p, US" ...");
4178 log_write(0, LOG_MAIN, "%s", big_buffer);
4179 Ustrcpy(big_buffer, US"...");
4182 printing = string_printing(argv[i]);
4183 if (!*printing) quote = US"\"";
4186 const uschar *pp = printing;
4188 while (*pp) if (isspace(*pp++)) { quote = US"\""; break; }
4190 p += sprintf(CS p, " %s%.*s%s", quote, (int)(big_buffer_size -
4191 (p - big_buffer) - 4), printing, quote);
4194 if (LOGGING(arguments))
4195 log_write(0, LOG_MAIN, "%s", big_buffer);
4197 debug_printf("%s\n", big_buffer);
4200 /* Set the working directory to be the top-level spool directory. We don't rely
4201 on this in the code, which always uses fully qualified names, but it's useful
4202 for core dumps etc. Don't complain if it fails - the spool directory might not
4203 be generally accessible and calls with the -C option (and others) have lost
4204 privilege by now. Before the chdir, we try to ensure that the directory exists.
4207 if (Uchdir(spool_directory) != 0)
4209 (void) directory_make(spool_directory, US"", SPOOL_DIRECTORY_MODE, FALSE);
4210 (void) Uchdir(spool_directory);
4213 /* Handle calls with the -bi option. This is a sendmail option to rebuild *the*
4214 alias file. Exim doesn't have such a concept, but this call is screwed into
4215 Sun's YP makefiles. Handle this by calling a configured script, as the real
4216 user who called Exim. The -oA option can be used to pass an argument to the
4221 (void) fclose(config_file);
4222 if (bi_command && *bi_command)
4226 argv[i++] = bi_command;
4227 if (alias_arg) argv[i++] = alias_arg;
4230 setgroups(group_count, group_list);
4231 exim_setugid(real_uid, real_gid, FALSE, US"running bi_command");
4233 DEBUG(D_exec) debug_printf("exec '%.256s' %s%.256s%s\n", argv[0],
4234 argv[1] ? "'" : "", argv[1] ? argv[1] : US"", argv[1] ? "'" : "");
4236 execv(CS argv[0], (char *const *)argv);
4237 exim_fail("exim: exec '%s' failed: %s\n", argv[0], strerror(errno));
4241 DEBUG(D_any) debug_printf("-bi used but bi_command not set; exiting\n");
4246 /* We moved the admin/trusted check to be immediately after reading the
4247 configuration file. We leave these prints here to ensure that syslog setup,
4248 logfile setup, and so on has already happened. */
4250 if (f.trusted_caller) DEBUG(D_any) debug_printf("trusted user\n");
4251 if (f.admin_user) DEBUG(D_any) debug_printf("admin user\n");
4253 /* Only an admin user may start the daemon or force a queue run in the default
4254 configuration, but the queue run restriction can be relaxed. Only an admin
4255 user may request that a message be returned to its sender forthwith. Only an
4256 admin user may specify a debug level greater than D_v (because it might show
4257 passwords, etc. in lookup queries). Only an admin user may request a queue
4258 count. Only an admin user can use the test interface to scan for email
4259 (because Exim will be in the spool dir and able to look at mails). */
4263 BOOL debugset = (debug_selector & ~D_v) != 0;
4264 if ( deliver_give_up || f.daemon_listen || malware_test_file
4265 || count_queue && queue_list_requires_admin
4266 || list_queue && queue_list_requires_admin
4267 || queue_interval >= 0 && prod_requires_admin
4268 || queue_name_dest && prod_requires_admin
4269 || debugset && !f.running_in_test_harness
4271 exim_fail("exim:%s permission denied\n", debugset ? " debugging" : "");
4274 /* If the real user is not root or the exim uid, the argument for passing
4275 in an open TCP/IP connection for another message is not permitted, nor is
4276 running with the -N option for any delivery action, unless this call to exim is
4277 one that supplied an input message, or we are using a patched exim for
4278 regression testing. */
4280 if ( real_uid != root_uid && real_uid != exim_uid
4281 && ( continue_hostname
4283 && (queue_interval >= 0 || f.daemon_listen || msg_action_arg > 0)
4285 && !f.running_in_test_harness
4287 exim_fail("exim: Permission denied\n");
4289 /* If the caller is not trusted, certain arguments are ignored when running for
4290 real, but are permitted when checking things (-be, -bv, -bt, -bh, -bf, -bF).
4291 Note that authority for performing certain actions on messages is tested in the
4292 queue_action() function. */
4294 if (!f.trusted_caller && !checking)
4296 sender_host_name = sender_host_address = interface_address =
4297 sender_ident = received_protocol = NULL;
4298 sender_host_port = interface_port = 0;
4299 sender_host_authenticated = authenticated_sender = authenticated_id = NULL;
4302 /* If a sender host address is set, extract the optional port number off the
4303 end of it and check its syntax. Do the same thing for the interface address.
4304 Exim exits if the syntax is bad. */
4308 if (sender_host_address)
4309 sender_host_port = check_port(sender_host_address);
4310 if (interface_address)
4311 interface_port = check_port(interface_address);
4314 /* If the caller is trusted, then they can use -G to suppress_local_fixups. */
4317 if (f.trusted_caller)
4319 f.suppress_local_fixups = f.suppress_local_fixups_default = TRUE;
4320 DEBUG(D_acl) debug_printf("suppress_local_fixups forced on by -G\n");
4323 exim_fail("exim: permission denied (-G requires a trusted user)\n");
4326 /* If an SMTP message is being received check to see if the standard input is a
4327 TCP/IP socket. If it is, we assume that Exim was called from inetd if the
4328 caller is root or the Exim user, or if the port is a privileged one. Otherwise,
4333 union sockaddr_46 inetd_sock;
4334 EXIM_SOCKLEN_T size = sizeof(inetd_sock);
4335 if (getpeername(0, (struct sockaddr *)(&inetd_sock), &size) == 0)
4337 int family = ((struct sockaddr *)(&inetd_sock))->sa_family;
4338 if (family == AF_INET || family == AF_INET6)
4340 union sockaddr_46 interface_sock;
4341 size = sizeof(interface_sock);
4343 if (getsockname(0, (struct sockaddr *)(&interface_sock), &size) == 0)
4344 interface_address = host_ntoa(-1, &interface_sock, NULL,
4347 if (host_is_tls_on_connect_port(interface_port)) tls_in.on_connect = TRUE;
4349 if (real_uid == root_uid || real_uid == exim_uid || interface_port < 1024)
4352 sender_host_address = host_ntoa(-1, (struct sockaddr *)(&inetd_sock),
4353 NULL, &sender_host_port);
4354 if (mua_wrapper) log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Input from "
4355 "inetd is not supported when mua_wrapper is set");
4359 "exim: Permission denied (unprivileged user, unprivileged port)\n");
4364 /* If the load average is going to be needed while receiving a message, get it
4365 now for those OS that require the first call to os_getloadavg() to be done as
4366 root. There will be further calls later for each message received. */
4368 #ifdef LOAD_AVG_NEEDS_ROOT
4369 if ( receiving_message
4370 && (queue_only_load >= 0 || (f.is_inetd && smtp_load_reserve >= 0)))
4371 load_average = OS_GETLOADAVG();
4374 /* The queue_only configuration option can be overridden by -odx on the command
4375 line, except that if queue_only_override is false, queue_only cannot be unset
4376 from the command line. */
4378 if (queue_only_set && (queue_only_override || arg_queue_only))
4379 queue_only = arg_queue_only;
4381 /* The receive_timeout and smtp_receive_timeout options can be overridden by
4384 if (arg_receive_timeout >= 0) receive_timeout = arg_receive_timeout;
4385 if (arg_smtp_receive_timeout >= 0)
4386 smtp_receive_timeout = arg_smtp_receive_timeout;
4388 /* If Exim was started with root privilege, unless we have already removed the
4389 root privilege above as a result of -C, -D, -be, -bf or -bF, remove it now
4390 except when starting the daemon or doing some kind of delivery or address
4391 testing (-bt). These are the only cases when root need to be retained. We run
4392 as exim for -bv and -bh. However, if deliver_drop_privilege is set, root is
4393 retained only for starting the daemon. We always do the initgroups() in this
4394 situation (controlled by the TRUE below), in order to be as close as possible
4395 to the state Exim usually runs in. */
4397 if ( !unprivileged /* originally had root AND */
4398 && !removed_privilege /* still got root AND */
4399 && !f.daemon_listen /* not starting the daemon */
4400 && queue_interval <= 0 /* (either kind of daemon) */
4401 && ( /* AND EITHER */
4402 deliver_drop_privilege /* requested unprivileged */
4404 queue_interval < 0 /* not running the queue */
4405 && ( msg_action_arg < 0 /* and */
4406 || msg_action != MSG_DELIVER /* not delivering */
4408 && (!checking || !f.address_test_mode) /* not address checking */
4409 && !rcpt_verify_quota /* and not quota checking */
4411 exim_setugid(exim_uid, exim_gid, TRUE, US"privilege not needed");
4413 /* When we are retaining a privileged uid, we still change to the exim gid. */
4418 DEBUG(D_any) debug_printf("dropping to exim gid; retaining priv uid\n");
4419 rv = setgid(exim_gid);
4420 /* Impact of failure is that some stuff might end up with an incorrect group.
4421 We track this for failures from root, since any attempt to change privilege
4422 by root should succeed and failures should be examined. For non-root,
4423 there's no security risk. For me, it's { exim -bV } on a just-built binary,
4424 no need to complain then. */
4426 if (!(unprivileged || removed_privilege))
4427 exim_fail("exim: changing group failed: %s\n", strerror(errno));
4430 DEBUG(D_any) debug_printf("changing group to %ld failed: %s\n",
4431 (long int)exim_gid, strerror(errno));
4435 /* Handle a request to scan a file for malware */
4436 if (malware_test_file)
4438 #ifdef WITH_CONTENT_SCAN
4440 set_process_info("scanning file for malware");
4441 if ((result = malware_in_file(malware_test_file)) == FAIL)
4443 printf("No malware found.\n");
4448 printf("Malware lookup returned non-okay/fail: %d\n", result);
4452 printf("Malware found: %s\n", malware_name);
4454 printf("Malware scan detected malware of unknown name.\n");
4456 printf("Malware scanning not enabled at compile time.\n");
4461 /* Handle a request to list the delivery queue */
4465 set_process_info("listing the queue");
4466 queue_list(list_queue_option, argv + recipients_arg, argc - recipients_arg);
4470 /* Handle a request to count the delivery queue */
4474 set_process_info("counting the queue");
4475 fprintf(stdout, "%u\n", queue_count());
4479 /* Handle actions on specific messages, except for the force delivery and
4480 message load actions, which are done below. Some actions take a whole list of
4481 message ids, which are known to continue up to the end of the arguments. Others
4482 take a single message id and then operate on the recipients list. */
4484 if (msg_action_arg > 0 && msg_action != MSG_DELIVER && msg_action != MSG_LOAD)
4486 int yield = EXIT_SUCCESS;
4487 set_process_info("acting on specified messages");
4489 /* ACL definitions may be needed when removing a message (-Mrm) because
4490 event_action gets expanded */
4492 if (msg_action == MSG_REMOVE)
4495 if (!one_msg_action)
4497 for (i = msg_action_arg; i < argc; i++)
4498 if (!queue_action(argv[i], msg_action, NULL, 0, 0))
4499 yield = EXIT_FAILURE;
4502 case MSG_REMOVE: case MSG_FREEZE: case MSG_THAW: break;
4503 default: printf("\n"); break;
4507 else if (!queue_action(argv[msg_action_arg], msg_action, argv, argc,
4508 recipients_arg)) yield = EXIT_FAILURE;
4512 /* We used to set up here to skip reading the ACL section, on
4513 (msg_action_arg > 0 || (queue_interval == 0 && !f.daemon_listen)
4514 Now, since the intro of the ${acl } expansion, ACL definitions may be
4515 needed in transports so we lost the optimisation. */
4518 #ifdef MEASURE_TIMING
4519 struct timeval t0, diff;
4520 (void)gettimeofday(&t0, NULL);
4525 #ifdef MEASURE_TIMING
4526 report_time_since(&t0, US"readconf_rest (delta)");
4530 /* Handle a request to check quota */
4531 if (rcpt_verify_quota)
4532 if (real_uid != root_uid && real_uid != exim_uid)
4533 exim_fail("exim: Permission denied\n");
4534 else if (recipients_arg >= argc)
4535 exim_fail("exim: missing recipient for quota check\n");
4538 verify_quota(argv[recipients_arg]);
4539 exim_exit(EXIT_SUCCESS);
4542 /* Handle the -brt option. This is for checking out retry configurations.
4543 The next three arguments are a domain name or a complete address, and
4544 optionally two error numbers. All it does is to call the function that
4545 scans the retry configuration data. */
4547 if (test_retry_arg >= 0)
4549 retry_config *yield;
4550 int basic_errno = 0;
4554 if (test_retry_arg >= argc)
4556 printf("-brt needs a domain or address argument\n");
4557 exim_exit(EXIT_FAILURE);
4559 s1 = exim_str_fail_toolong(argv[test_retry_arg++], EXIM_EMAILADDR_MAX, "-brt");
4562 /* If the first argument contains no @ and no . it might be a local user
4563 or it might be a single-component name. Treat as a domain. */
4565 if (Ustrchr(s1, '@') == NULL && Ustrchr(s1, '.') == NULL)
4567 printf("Warning: \"%s\" contains no '@' and no '.' characters. It is "
4568 "being \ntreated as a one-component domain, not as a local part.\n\n",
4572 /* There may be an optional second domain arg. */
4574 if (test_retry_arg < argc && Ustrchr(argv[test_retry_arg], '.') != NULL)
4575 s2 = exim_str_fail_toolong(argv[test_retry_arg++], EXIM_DOMAINNAME_MAX, "-brt 2nd");
4577 /* The final arg is an error name */
4579 if (test_retry_arg < argc)
4581 uschar *ss = exim_str_fail_toolong(argv[test_retry_arg], EXIM_DRIVERNAME_MAX, "-brt 3rd");
4583 readconf_retry_error(ss, ss + Ustrlen(ss), &basic_errno, &more_errno);
4586 printf("%s\n", CS error);
4587 return EXIT_FAILURE;
4590 /* For the {MAIL,RCPT,DATA}_4xx errors, a value of 255 means "any", and a
4591 code > 100 as an error is for matching codes to the decade. Turn them into
4592 a real error code, off the decade. */
4594 if (basic_errno == ERRNO_MAIL4XX ||
4595 basic_errno == ERRNO_RCPT4XX ||
4596 basic_errno == ERRNO_DATA4XX)
4598 int code = (more_errno >> 8) & 255;
4600 more_errno = (more_errno & 0xffff00ff) | (21 << 8);
4601 else if (code > 100)
4602 more_errno = (more_errno & 0xffff00ff) | ((code - 96) << 8);
4606 if (!(yield = retry_find_config(s1, s2, basic_errno, more_errno)))
4607 printf("No retry information found\n");
4610 more_errno = yield->more_errno;
4611 printf("Retry rule: %s ", yield->pattern);
4613 if (yield->basic_errno == ERRNO_EXIMQUOTA)
4615 printf("quota%s%s ",
4616 (more_errno > 0)? "_" : "",
4617 (more_errno > 0)? readconf_printtime(more_errno) : US"");
4619 else if (yield->basic_errno == ECONNREFUSED)
4621 printf("refused%s%s ",
4622 (more_errno > 0)? "_" : "",
4623 (more_errno == 'M')? "MX" :
4624 (more_errno == 'A')? "A" : "");
4626 else if (yield->basic_errno == ETIMEDOUT)
4629 if ((more_errno & RTEF_CTOUT) != 0) printf("_connect");
4631 if (more_errno != 0) printf("_%s",
4632 (more_errno == 'M')? "MX" : "A");
4635 else if (yield->basic_errno == ERRNO_AUTHFAIL)
4636 printf("auth_failed ");
4639 for (retry_rule * r = yield->rules; r; r = r->next)
4641 printf("%c,%s", r->rule, readconf_printtime(r->timeout)); /* Do not */
4642 printf(",%s", readconf_printtime(r->p1)); /* amalgamate */
4648 printf(",%d.", x/1000);
4662 exim_exit(EXIT_SUCCESS);
4665 /* Handle a request to list one or more configuration options */
4666 /* If -n was set, we suppress some information */
4671 set_process_info("listing variables");
4672 if (recipients_arg >= argc)
4673 fail = !readconf_print(US"all", NULL, flag_n);
4674 else for (i = recipients_arg; i < argc; i++)
4677 (Ustrcmp(argv[i], "router") == 0 ||
4678 Ustrcmp(argv[i], "transport") == 0 ||
4679 Ustrcmp(argv[i], "authenticator") == 0 ||
4680 Ustrcmp(argv[i], "macro") == 0 ||
4681 Ustrcmp(argv[i], "environment") == 0))
4683 fail |= !readconf_print(exim_str_fail_toolong(argv[i+1], EXIM_DRIVERNAME_MAX, "-bP name"), argv[i], flag_n);
4687 fail = !readconf_print(exim_str_fail_toolong(argv[i], EXIM_DRIVERNAME_MAX, "-bP item"), NULL, flag_n);
4689 exim_exit(fail ? EXIT_FAILURE : EXIT_SUCCESS);
4694 set_process_info("listing config");
4695 exim_exit(readconf_print(US"config", NULL, flag_n)
4696 ? EXIT_SUCCESS : EXIT_FAILURE);
4700 /* Initialise subsystems as required. */
4704 /* Handle a request to deliver one or more messages that are already on the
4705 queue. Values of msg_action other than MSG_DELIVER and MSG_LOAD are dealt with
4706 above. MSG_LOAD is handled with -be (which is the only time it applies) below.
4708 Delivery of specific messages is typically used for a small number when
4709 prodding by hand (when the option forced_delivery will be set) or when
4710 re-execing to regain root privilege. Each message delivery must happen in a
4711 separate process, so we fork a process for each one, and run them sequentially
4712 so that debugging output doesn't get intertwined, and to avoid spawning too
4713 many processes if a long list is given. However, don't fork for the last one;
4714 this saves a process in the common case when Exim is called to deliver just one
4717 if (msg_action_arg > 0 && msg_action != MSG_LOAD)
4719 if (prod_requires_admin && !f.admin_user)
4721 fprintf(stderr, "exim: Permission denied\n");
4722 exim_exit(EXIT_FAILURE);
4724 set_process_info("delivering specified messages");
4725 if (deliver_give_up) forced_delivery = f.deliver_force_thaw = TRUE;
4726 for (i = msg_action_arg; i < argc; i++)
4730 /*XXX This use of argv[i] for msg_id should really be tainted, but doing
4731 that runs into a later copy into the untainted global message_id[] */
4732 /*XXX Do we need a length limit check here? */
4734 (void)deliver_message(argv[i], forced_delivery, deliver_give_up);
4735 else if ((pid = exim_fork(US"cmdline-delivery")) == 0)
4737 (void)deliver_message(argv[i], forced_delivery, deliver_give_up);
4738 exim_underbar_exit(EXIT_SUCCESS);
4742 fprintf(stderr, "failed to fork delivery process for %s: %s\n", argv[i],
4744 exim_exit(EXIT_FAILURE);
4748 exim_exit(EXIT_SUCCESS);
4752 /* If only a single queue run is requested, without SMTP listening, we can just
4753 turn into a queue runner, with an optional starting message id. */
4755 if (queue_interval == 0 && !f.daemon_listen)
4757 DEBUG(D_queue_run) debug_printf("Single queue run%s%s%s%s\n",
4758 start_queue_run_id ? US" starting at " : US"",
4759 start_queue_run_id ? start_queue_run_id: US"",
4760 stop_queue_run_id ? US" stopping at " : US"",
4761 stop_queue_run_id ? stop_queue_run_id : US"");
4763 set_process_info("running the '%s' queue (single queue run)", queue_name);
4765 set_process_info("running the queue (single queue run)");
4766 queue_run(start_queue_run_id, stop_queue_run_id, FALSE);
4767 exim_exit(EXIT_SUCCESS);
4771 /* Find the login name of the real user running this process. This is always
4772 needed when receiving a message, because it is written into the spool file. It
4773 may also be used to construct a from: or a sender: header, and in this case we
4774 need the user's full name as well, so save a copy of it, checked for RFC822
4775 syntax and munged if necessary, if it hasn't previously been set by the -F
4776 argument. We may try to get the passwd entry more than once, in case NIS or
4777 other delays are in evidence. Save the home directory for use in filter testing
4782 if ((pw = getpwuid(real_uid)) != NULL)
4784 originator_login = string_copy(US pw->pw_name);
4785 originator_home = string_copy(US pw->pw_dir);
4787 /* If user name has not been set by -F, set it from the passwd entry
4788 unless -f has been used to set the sender address by a trusted user. */
4790 if (!originator_name)
4792 if (!sender_address || (!f.trusted_caller && filter_test == FTEST_NONE))
4794 uschar *name = US pw->pw_gecos;
4795 uschar *amp = Ustrchr(name, '&');
4798 /* Most Unix specify that a '&' character in the gecos field is
4799 replaced by a copy of the login name, and some even specify that
4800 the first character should be upper cased, so that's what we do. */
4805 string_format(buffer, sizeof(buffer), "%.*s%n%s%s",
4806 (int)(amp - name), name, &loffset, originator_login, amp + 1);
4807 buffer[loffset] = toupper(buffer[loffset]);
4811 /* If a pattern for matching the gecos field was supplied, apply
4812 it and then expand the name string. */
4814 if (gecos_pattern && gecos_name)
4817 re = regex_must_compile(gecos_pattern, FALSE, TRUE); /* Use malloc */
4819 if (regex_match_and_setup(re, name, 0, -1))
4821 uschar *new_name = expand_string(gecos_name);
4825 DEBUG(D_receive) debug_printf("user name \"%s\" extracted from "
4826 "gecos field \"%s\"\n", new_name, name);
4829 else DEBUG(D_receive) debug_printf("failed to expand gecos_name string "
4830 "\"%s\": %s\n", gecos_name, expand_string_message);
4832 else DEBUG(D_receive) debug_printf("gecos_pattern \"%s\" did not match "
4833 "gecos field \"%s\"\n", gecos_pattern, name);
4834 store_free((void *)re);
4836 originator_name = string_copy(name);
4839 /* A trusted caller has used -f but not -F */
4841 else originator_name = US"";
4844 /* Break the retry loop */
4849 if (++i > finduser_retries) break;
4853 /* If we cannot get a user login, log the incident and give up, unless the
4854 configuration specifies something to use. When running in the test harness,
4855 any setting of unknown_login overrides the actual name. */
4857 if (!originator_login || f.running_in_test_harness)
4861 originator_login = expand_string(unknown_login);
4862 if (!originator_name && unknown_username)
4863 originator_name = expand_string(unknown_username);
4864 if (!originator_name) originator_name = US"";
4866 if (!originator_login)
4867 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Failed to get user name for uid %d",
4871 /* Ensure that the user name is in a suitable form for use as a "phrase" in an
4874 originator_name = US parse_fix_phrase(originator_name, Ustrlen(originator_name));
4876 /* If a message is created by this call of Exim, the uid/gid of its originator
4877 are those of the caller. These values are overridden if an existing message is
4878 read in from the spool. */
4880 originator_uid = real_uid;
4881 originator_gid = real_gid;
4883 DEBUG(D_receive) debug_printf("originator: uid=%d gid=%d login=%s name=%s\n",
4884 (int)originator_uid, (int)originator_gid, originator_login, originator_name);
4886 /* Run in daemon and/or queue-running mode. The function daemon_go() never
4887 returns. We leave this till here so that the originator_ fields are available
4888 for incoming messages via the daemon. The daemon cannot be run in mua_wrapper
4891 if (f.daemon_listen || f.inetd_wait_mode || queue_interval > 0)
4895 fprintf(stderr, "Daemon cannot be run when mua_wrapper is set\n");
4896 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Daemon cannot be run when "
4897 "mua_wrapper is set");
4900 # ifndef DISABLE_TLS
4901 /* This also checks that the library linkage is working and we can call
4902 routines in it, so call even if tls_require_ciphers is unset */
4904 # ifdef MEASURE_TIMING
4905 struct timeval t0, diff;
4906 (void)gettimeofday(&t0, NULL);
4908 if (!tls_dropprivs_validate_require_cipher(FALSE))
4910 # ifdef MEASURE_TIMING
4911 report_time_since(&t0, US"validate_ciphers (delta)");
4919 /* If the sender ident has not been set (by a trusted caller) set it to
4920 the caller. This will get overwritten below for an inetd call. If a trusted
4921 caller has set it empty, unset it. */
4923 if (!sender_ident) sender_ident = originator_login;
4924 else if (!*sender_ident) sender_ident = NULL;
4926 /* Handle the -brw option, which is for checking out rewriting rules. Cause log
4927 writes (on errors) to go to stderr instead. Can't do this earlier, as want the
4928 originator_* variables set. */
4930 if (test_rewrite_arg >= 0)
4932 f.really_exim = FALSE;
4933 if (test_rewrite_arg >= argc)
4935 printf("-brw needs an address argument\n");
4936 exim_exit(EXIT_FAILURE);
4938 rewrite_test(exim_str_fail_toolong(argv[test_rewrite_arg], EXIM_EMAILADDR_MAX, "-brw"));
4939 exim_exit(EXIT_SUCCESS);
4942 /* A locally-supplied message is considered to be coming from a local user
4943 unless a trusted caller supplies a sender address with -f, or is passing in the
4944 message via SMTP (inetd invocation or otherwise). */
4946 if ( !sender_address && !smtp_input
4947 || !f.trusted_caller && filter_test == FTEST_NONE)
4949 f.sender_local = TRUE;
4951 /* A trusted caller can supply authenticated_sender and authenticated_id
4952 via -oMas and -oMai and if so, they will already be set. Otherwise, force
4953 defaults except when host checking. */
4955 if (!authenticated_sender && !host_checking)
4956 authenticated_sender = string_sprintf("%s@%s", originator_login,
4957 qualify_domain_sender);
4958 if (!authenticated_id && !host_checking)
4959 authenticated_id = originator_login;
4962 /* Trusted callers are always permitted to specify the sender address.
4963 Untrusted callers may specify it if it matches untrusted_set_sender, or if what
4964 is specified is the empty address. However, if a trusted caller does not
4965 specify a sender address for SMTP input, we leave sender_address unset. This
4966 causes the MAIL commands to be honoured. */
4968 if ( !smtp_input && !sender_address
4969 || !receive_check_set_sender(sender_address))
4971 /* Either the caller is not permitted to set a general sender, or this is
4972 non-SMTP input and the trusted caller has not set a sender. If there is no
4973 sender, or if a sender other than <> is set, override with the originator's
4974 login (which will get qualified below), except when checking things. */
4976 if ( !sender_address /* No sender_address set */
4978 (sender_address[0] != 0 && /* Non-empty sender address, AND */
4979 !checking)) /* Not running tests, including filter tests */
4981 sender_address = originator_login;
4982 f.sender_address_forced = FALSE;
4983 sender_address_domain = 0;
4987 /* Remember whether an untrusted caller set the sender address */
4989 f.sender_set_untrusted = sender_address != originator_login && !f.trusted_caller;
4991 /* Ensure that the sender address is fully qualified unless it is the empty
4992 address, which indicates an error message, or doesn't exist (root caller, smtp
4993 interface, no -f argument). */
4995 if (sender_address && *sender_address && sender_address_domain == 0)
4996 sender_address = string_sprintf("%s@%s", local_part_quote(sender_address),
4997 qualify_domain_sender);
4999 DEBUG(D_receive) debug_printf("sender address = %s\n", sender_address);
5001 /* Handle a request to verify a list of addresses, or test them for delivery.
5002 This must follow the setting of the sender address, since routers can be
5003 predicated upon the sender. If no arguments are given, read addresses from
5004 stdin. Set debug_level to at least D_v to get full output for address testing.
5007 if (verify_address_mode || f.address_test_mode)
5010 int flags = vopt_qualify;
5012 if (verify_address_mode)
5014 if (!verify_as_sender) flags |= vopt_is_recipient;
5015 DEBUG(D_verify) debug_print_ids(US"Verifying:");
5020 flags |= vopt_is_recipient;
5021 debug_selector |= D_v;
5022 debug_file = stderr;
5023 debug_fd = fileno(debug_file);
5024 DEBUG(D_verify) debug_print_ids(US"Address testing:");
5027 if (recipients_arg < argc)
5028 while (recipients_arg < argc)
5030 /* Supplied addresses are tainted since they come from a user */
5031 uschar * s = string_copy_taint(exim_str_fail_toolong(argv[recipients_arg++], EXIM_DISPLAYMAIL_MAX, "address verification"), TRUE);
5034 BOOL finished = FALSE;
5035 uschar *ss = parse_find_address_end(s, FALSE);
5036 if (*ss == ',') *ss = 0; else finished = TRUE;
5037 test_address(s, flags, &exit_value);
5040 while (*++s == ',' || isspace(*s)) ;
5046 uschar * s = get_stdinput(NULL, NULL);
5048 test_address(string_copy_taint(exim_str_fail_toolong(s, EXIM_DISPLAYMAIL_MAX, "address verification (stdin)"), TRUE), flags, &exit_value);
5052 exim_exit(exit_value);
5055 /* Handle expansion checking. Either expand items on the command line, or read
5056 from stdin if there aren't any. If -Mset was specified, load the message so
5057 that its variables can be used, but restrict this facility to admin users.
5058 Otherwise, if -bem was used, read a message from stdin. */
5062 dns_init(FALSE, FALSE, FALSE);
5063 if (msg_action_arg > 0 && msg_action == MSG_LOAD)
5065 uschar spoolname[SPOOL_NAME_LENGTH]; /* Not big_buffer; used in spool_read_header() */
5067 exim_fail("exim: permission denied\n");
5068 message_id = exim_str_fail_toolong(argv[msg_action_arg], MESSAGE_ID_LENGTH, "message-id");
5069 (void)string_format(spoolname, sizeof(spoolname), "%s-H", message_id);
5070 if ((deliver_datafile = spool_open_datafile(message_id)) < 0)
5071 printf ("Failed to load message datafile %s\n", message_id);
5072 if (spool_read_header(spoolname, TRUE, FALSE) != spool_read_OK)
5073 printf ("Failed to load message %s\n", message_id);
5076 /* Read a test message from a file. We fudge it up to be on stdin, saving
5077 stdin itself for later reading of expansion strings. */
5079 else if (expansion_test_message)
5081 int save_stdin = dup(0);
5082 int fd = Uopen(expansion_test_message, O_RDONLY, 0);
5084 exim_fail("exim: failed to open %s: %s\n", expansion_test_message,
5087 filter_test = FTEST_USER; /* Fudge to make it look like filter test */
5088 message_ended = END_NOTENDED;
5089 read_message_body(receive_msg(extract_recipients));
5090 message_linecount += body_linecount;
5091 (void)dup2(save_stdin, 0);
5092 (void)close(save_stdin);
5093 clearerr(stdin); /* Required by Darwin */
5096 /* Only admin users may see config-file macros this way */
5098 if (!f.admin_user) macros_user = macros = mlast = NULL;
5100 /* Allow $recipients for this testing */
5102 f.enable_dollar_recipients = TRUE;
5104 /* Expand command line items */
5106 if (recipients_arg < argc)
5107 while (recipients_arg < argc)
5108 expansion_test_line(exim_str_fail_toolong(argv[recipients_arg++], EXIM_EMAILADDR_MAX, "recipient"));
5114 char *(*fn_readline)(const char *) = NULL;
5115 void (*fn_addhist)(const char *) = NULL;
5119 void *dlhandle = set_readline(&fn_readline, &fn_addhist);
5122 while (s = get_stdinput(fn_readline, fn_addhist))
5123 expansion_test_line(s);
5126 if (dlhandle) dlclose(dlhandle);
5130 /* The data file will be open after -Mset */
5132 if (deliver_datafile >= 0)
5134 (void)close(deliver_datafile);
5135 deliver_datafile = -1;
5138 exim_exit(EXIT_SUCCESS);
5142 /* The active host name is normally the primary host name, but it can be varied
5143 for hosts that want to play several parts at once. We need to ensure that it is
5144 set for host checking, and for receiving messages. */
5146 smtp_active_hostname = primary_hostname;
5147 if (raw_active_hostname != NULL)
5149 uschar *nah = expand_string(raw_active_hostname);
5152 if (!f.expand_string_forcedfail)
5153 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to expand \"%s\" "
5154 "(smtp_active_hostname): %s", raw_active_hostname,
5155 expand_string_message);
5157 else if (nah[0] != 0) smtp_active_hostname = nah;
5160 /* Handle host checking: this facility mocks up an incoming SMTP call from a
5161 given IP address so that the blocking and relay configuration can be tested.
5162 Unless a sender_ident was set by -oMt, we discard it (the default is the
5163 caller's login name). An RFC 1413 call is made only if we are running in the
5164 test harness and an incoming interface and both ports are specified, because
5165 there is no TCP/IP call to find the ident for. */
5172 if (!sender_ident_set)
5174 sender_ident = NULL;
5175 if (f.running_in_test_harness && sender_host_port
5176 && interface_address && interface_port)
5177 verify_get_ident(1223); /* note hardwired port number */
5180 /* In case the given address is a non-canonical IPv6 address, canonicalize
5181 it. The code works for both IPv4 and IPv6, as it happens. */
5183 size = host_aton(sender_host_address, x);
5184 sender_host_address = store_get(48, FALSE); /* large enough for full IPv6 */
5185 (void)host_nmtoa(size, x, -1, sender_host_address, ':');
5187 /* Now set up for testing */
5189 host_build_sender_fullhost();
5193 f.sender_local = FALSE;
5194 f.sender_host_notsocket = TRUE;
5195 debug_file = stderr;
5196 debug_fd = fileno(debug_file);
5197 fprintf(stdout, "\n**** SMTP testing session as if from host %s\n"
5198 "**** but without any ident (RFC 1413) callback.\n"
5199 "**** This is not for real!\n\n",
5200 sender_host_address);
5202 memset(sender_host_cache, 0, sizeof(sender_host_cache));
5203 if (verify_check_host(&hosts_connection_nolog) == OK)
5204 BIT_CLEAR(log_selector, log_selector_size, Li_smtp_connection);
5205 log_write(L_smtp_connection, LOG_MAIN, "%s", smtp_get_connection_info());
5207 /* NOTE: We do *not* call smtp_log_no_mail() if smtp_start_session() fails,
5208 because a log line has already been written for all its failure exists
5209 (usually "connection refused: <reason>") and writing another one is
5210 unnecessary clutter. */
5212 if (smtp_start_session())
5215 for (; (reset_point = store_mark()); store_reset(reset_point))
5217 if (smtp_setup_msg() <= 0) break;
5218 if (!receive_msg(FALSE)) break;
5220 return_path = sender_address = NULL;
5221 dnslist_domain = dnslist_matched = NULL;
5222 #ifndef DISABLE_DKIM
5223 dkim_cur_signer = NULL;
5226 deliver_localpart_orig = NULL;
5227 deliver_domain_orig = NULL;
5228 callout_address = sending_ip_address = NULL;
5229 deliver_localpart_data = deliver_domain_data =
5230 recipient_data = sender_data = NULL;
5231 sender_rate = sender_rate_limit = sender_rate_period = NULL;
5235 exim_exit(EXIT_SUCCESS);
5239 /* Arrange for message reception if recipients or SMTP were specified;
5240 otherwise complain unless a version print (-bV) happened or this is a filter
5241 verification test or info dump.
5242 In the former case, show the configuration file name. */
5244 if (recipients_arg >= argc && !extract_recipients && !smtp_input)
5246 if (version_printed)
5248 if (Ustrchr(config_main_filelist, ':'))
5249 printf("Configuration file search path is %s\n", config_main_filelist);
5250 printf("Configuration file is %s\n", config_main_filename);
5251 return EXIT_SUCCESS;
5254 if (info_flag != CMDINFO_NONE)
5256 show_exim_information(info_flag, info_stdout ? stdout : stderr);
5257 return info_stdout ? EXIT_SUCCESS : EXIT_FAILURE;
5260 if (filter_test == FTEST_NONE)
5261 exim_usage(called_as);
5265 /* If mua_wrapper is set, Exim is being used to turn an MUA that submits on the
5266 standard input into an MUA that submits to a smarthost over TCP/IP. We know
5267 that we are not called from inetd, because that is rejected above. The
5268 following configuration settings are forced here:
5270 (1) Synchronous delivery (-odi)
5271 (2) Errors to stderr (-oep == -oeq)
5272 (3) No parallel remote delivery
5273 (4) Unprivileged delivery
5275 We don't force overall queueing options because there are several of them;
5276 instead, queueing is avoided below when mua_wrapper is set. However, we do need
5277 to override any SMTP queueing. */
5281 f.synchronous_delivery = TRUE;
5282 arg_error_handling = ERRORS_STDERR;
5283 remote_max_parallel = 1;
5284 deliver_drop_privilege = TRUE;
5285 f.queue_smtp = FALSE;
5286 queue_smtp_domains = NULL;
5288 message_utf8_downconvert = -1; /* convert-if-needed */
5293 /* Prepare to accept one or more new messages on the standard input. When a
5294 message has been read, its id is returned in message_id[]. If doing immediate
5295 delivery, we fork a delivery process for each received message, except for the
5296 last one, where we can save a process switch.
5298 It is only in non-smtp mode that error_handling is allowed to be changed from
5299 its default of ERRORS_SENDER by argument. (Idle thought: are any of the
5300 sendmail error modes other than -oem ever actually used? Later: yes.) */
5302 if (!smtp_input) error_handling = arg_error_handling;
5304 /* If this is an inetd call, ensure that stderr is closed to prevent panic
5305 logging being sent down the socket and make an identd call to get the
5308 else if (f.is_inetd)
5310 (void)fclose(stderr);
5311 exim_nullstd(); /* Re-open to /dev/null */
5312 verify_get_ident(IDENT_PORT);
5313 host_build_sender_fullhost();
5314 set_process_info("handling incoming connection from %s via inetd",
5318 /* If the sender host address has been set, build sender_fullhost if it hasn't
5319 already been done (which it will have been for inetd). This caters for the
5320 case when it is forced by -oMa. However, we must flag that it isn't a socket,
5321 so that the test for IP options is skipped for -bs input. */
5323 if (sender_host_address && !sender_fullhost)
5325 host_build_sender_fullhost();
5326 set_process_info("handling incoming connection from %s via -oMa",
5328 f.sender_host_notsocket = TRUE;
5331 /* Otherwise, set the sender host as unknown except for inetd calls. This
5332 prevents host checking in the case of -bs not from inetd and also for -bS. */
5334 else if (!f.is_inetd) f.sender_host_unknown = TRUE;
5336 /* If stdout does not exist, then dup stdin to stdout. This can happen
5337 if exim is started from inetd. In this case fd 0 will be set to the socket,
5338 but fd 1 will not be set. This also happens for passed SMTP channels. */
5340 if (fstat(1, &statbuf) < 0) (void)dup2(0, 1);
5342 /* Set up the incoming protocol name and the state of the program. Root is
5343 allowed to force received protocol via the -oMr option above. If we have come
5344 via inetd, the process info has already been set up. We don't set
5345 received_protocol here for smtp input, as it varies according to
5346 batch/HELO/EHLO/AUTH/TLS. */
5350 if (!f.is_inetd) set_process_info("accepting a local %sSMTP message from <%s>",
5351 smtp_batched_input? "batched " : "",
5352 (sender_address!= NULL)? sender_address : originator_login);
5356 int old_pool = store_pool;
5357 store_pool = POOL_PERM;
5358 if (!received_protocol)
5359 received_protocol = string_sprintf("local%s", called_as);
5360 store_pool = old_pool;
5361 set_process_info("accepting a local non-SMTP message from <%s>",
5365 /* Initialize the session_local_queue-only flag (this will be ignored if
5366 mua_wrapper is set) */
5369 session_local_queue_only = queue_only;
5371 /* For non-SMTP and for batched SMTP input, check that there is enough space on
5372 the spool if so configured. On failure, we must not attempt to send an error
5373 message! (For interactive SMTP, the check happens at MAIL FROM and an SMTP
5374 error code is given.) */
5376 if ((!smtp_input || smtp_batched_input) && !receive_check_fs(0))
5377 exim_fail("exim: insufficient disk space\n");
5379 /* If this is smtp input of any kind, real or batched, handle the start of the
5382 NOTE: We do *not* call smtp_log_no_mail() if smtp_start_session() fails,
5383 because a log line has already been written for all its failure exists
5384 (usually "connection refused: <reason>") and writing another one is
5385 unnecessary clutter. */
5391 memset(sender_host_cache, 0, sizeof(sender_host_cache));
5392 if (verify_check_host(&hosts_connection_nolog) == OK)
5393 BIT_CLEAR(log_selector, log_selector_size, Li_smtp_connection);
5394 log_write(L_smtp_connection, LOG_MAIN, "%s", smtp_get_connection_info());
5395 if (!smtp_start_session())
5398 exim_exit(EXIT_SUCCESS);
5402 /* Otherwise, set up the input size limit here. */
5406 thismessage_size_limit = expand_string_integer(message_size_limit, TRUE);
5407 if (expand_string_message)
5408 if (thismessage_size_limit == -1)
5409 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to expand "
5410 "message_size_limit: %s", expand_string_message);
5412 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "invalid value for "
5413 "message_size_limit: %s", expand_string_message);
5416 /* Loop for several messages when reading SMTP input. If we fork any child
5417 processes, we don't want to wait for them unless synchronous delivery is
5418 requested, so set SIGCHLD to SIG_IGN in that case. This is not necessarily the
5419 same as SIG_DFL, despite the fact that documentation often lists the default as
5420 "ignore". This is a confusing area. This is what I know:
5422 At least on some systems (e.g. Solaris), just setting SIG_IGN causes child
5423 processes that complete simply to go away without ever becoming defunct. You
5424 can't then wait for them - but we don't want to wait for them in the
5425 non-synchronous delivery case. However, this behaviour of SIG_IGN doesn't
5426 happen for all OS (e.g. *BSD is different).
5428 But that's not the end of the story. Some (many? all?) systems have the
5429 SA_NOCLDWAIT option for sigaction(). This requests the behaviour that Solaris
5430 has by default, so it seems that the difference is merely one of default
5431 (compare restarting vs non-restarting signals).
5433 To cover all cases, Exim sets SIG_IGN with SA_NOCLDWAIT here if it can. If not,
5434 it just sets SIG_IGN. To be on the safe side it also calls waitpid() at the end
5435 of the loop below. Paranoia rules.
5437 February 2003: That's *still* not the end of the story. There are now versions
5438 of Linux (where SIG_IGN does work) that are picky. If, having set SIG_IGN, a
5439 process then calls waitpid(), a grumble is written to the system log, because
5440 this is logically inconsistent. In other words, it doesn't like the paranoia.
5441 As a consequence of this, the waitpid() below is now excluded if we are sure
5442 that SIG_IGN works. */
5444 if (!f.synchronous_delivery)
5447 struct sigaction act;
5448 act.sa_handler = SIG_IGN;
5449 sigemptyset(&(act.sa_mask));
5450 act.sa_flags = SA_NOCLDWAIT;
5451 sigaction(SIGCHLD, &act, NULL);
5453 signal(SIGCHLD, SIG_IGN);
5457 /* Save the current store pool point, for resetting at the start of
5458 each message, and save the real sender address, if any. */
5460 real_sender_address = sender_address;
5462 /* Loop to receive messages; receive_msg() returns TRUE if there are more
5463 messages to be read (SMTP input), or FALSE otherwise (not SMTP, or SMTP channel
5468 rmark reset_point = store_mark();
5471 /* Handle the SMTP case; call smtp_setup_mst() to deal with the initial SMTP
5472 input and build the recipients list, before calling receive_msg() to read the
5473 message proper. Whatever sender address is given in the SMTP transaction is
5474 often ignored for local senders - we use the actual sender, which is normally
5475 either the underlying user running this process or a -f argument provided by
5476 a trusted caller. It is saved in real_sender_address. The test for whether to
5477 accept the SMTP sender is encapsulated in receive_check_set_sender(). */
5482 if ((rc = smtp_setup_msg()) > 0)
5484 if (real_sender_address != NULL &&
5485 !receive_check_set_sender(sender_address))
5487 sender_address = raw_sender = real_sender_address;
5488 sender_address_unrewritten = NULL;
5491 /* For batched SMTP, we have to run the acl_not_smtp_start ACL, since it
5492 isn't really SMTP, so no other ACL will run until the acl_not_smtp one at
5493 the very end. The result of the ACL is ignored (as for other non-SMTP
5494 messages). It is run for its potential side effects. */
5496 if (smtp_batched_input && acl_not_smtp_start != NULL)
5498 uschar *user_msg, *log_msg;
5499 f.enable_dollar_recipients = TRUE;
5500 (void)acl_check(ACL_WHERE_NOTSMTP_START, NULL, acl_not_smtp_start,
5501 &user_msg, &log_msg);
5502 f.enable_dollar_recipients = FALSE;
5505 /* Now get the data for the message */
5507 more = receive_msg(extract_recipients);
5508 if (message_id[0] == 0)
5510 cancel_cutthrough_connection(TRUE, US"receive dropped");
5511 if (more) goto moreloop;
5512 smtp_log_no_mail(); /* Log no mail if configured */
5513 exim_exit(EXIT_FAILURE);
5518 cancel_cutthrough_connection(TRUE, US"message setup dropped");
5519 smtp_log_no_mail(); /* Log no mail if configured */
5520 exim_exit(rc ? EXIT_FAILURE : EXIT_SUCCESS);
5524 /* In the non-SMTP case, we have all the information from the command
5525 line, but must process it in case it is in the more general RFC822
5526 format, and in any case, to detect syntax errors. Also, it appears that
5527 the use of comma-separated lists as single arguments is common, so we
5528 had better support them. */
5533 int count = argc - recipients_arg;
5534 uschar **list = argv + recipients_arg;
5536 /* These options cannot be changed dynamically for non-SMTP messages */
5538 f.active_local_sender_retain = local_sender_retain;
5539 f.active_local_from_check = local_from_check;
5541 /* Save before any rewriting */
5543 raw_sender = string_copy(sender_address);
5545 /* Loop for each argument (supplied by user hence tainted) */
5547 for (int i = 0; i < count; i++)
5549 int start, end, domain;
5551 /* There can be multiple addresses, so EXIM_DISPLAYMAIL_MAX (tuned for 1) is too short.
5552 * We'll still want to cap it to something, just in case. */
5553 uschar * s = string_copy_taint(exim_str_fail_toolong(list[i], BIG_BUFFER_SIZE, "address argument"), TRUE);
5555 /* Loop for each comma-separated address */
5559 BOOL finished = FALSE;
5561 uschar *ss = parse_find_address_end(s, FALSE);
5563 if (*ss == ',') *ss = 0; else finished = TRUE;
5565 /* Check max recipients - if -t was used, these aren't recipients */
5567 if (recipients_max > 0 && ++rcount > recipients_max &&
5568 !extract_recipients)
5569 if (error_handling == ERRORS_STDERR)
5571 fprintf(stderr, "exim: too many recipients\n");
5572 exim_exit(EXIT_FAILURE);
5576 moan_to_sender(ERRMESS_TOOMANYRECIP, NULL, NULL, stdin, TRUE)?
5577 errors_sender_rc : EXIT_FAILURE;
5581 BOOL b = allow_utf8_domains;
5582 allow_utf8_domains = TRUE;
5585 parse_extract_address(s, &errmess, &start, &end, &domain, FALSE);
5588 if (string_is_utf8(recipient))
5589 message_smtputf8 = TRUE;
5591 allow_utf8_domains = b;
5594 if (domain == 0 && !f.allow_unqualified_recipient)
5597 errmess = US"unqualified recipient address not allowed";
5601 if (error_handling == ERRORS_STDERR)
5603 fprintf(stderr, "exim: bad recipient address \"%s\": %s\n",
5604 string_printing(list[i]), errmess);
5605 exim_exit(EXIT_FAILURE);
5611 eblock.text1 = string_printing(list[i]);
5612 eblock.text2 = errmess;
5614 moan_to_sender(ERRMESS_BADARGADDRESS, &eblock, NULL, stdin, TRUE)?
5615 errors_sender_rc : EXIT_FAILURE;
5618 receive_add_recipient(string_copy_taint(recipient, TRUE), -1);
5621 while (*(++s) != 0 && (*s == ',' || isspace(*s)));
5625 /* Show the recipients when debugging */
5629 if (sender_address) debug_printf("Sender: %s\n", sender_address);
5630 if (recipients_list)
5632 debug_printf("Recipients:\n");
5633 for (int i = 0; i < recipients_count; i++)
5634 debug_printf(" %s\n", recipients_list[i].address);
5638 /* Run the acl_not_smtp_start ACL if required. The result of the ACL is
5639 ignored; rejecting here would just add complication, and it can just as
5640 well be done later. Allow $recipients to be visible in the ACL. */
5642 if (acl_not_smtp_start)
5644 uschar *user_msg, *log_msg;
5645 f.enable_dollar_recipients = TRUE;
5646 (void)acl_check(ACL_WHERE_NOTSMTP_START, NULL, acl_not_smtp_start,
5647 &user_msg, &log_msg);
5648 f.enable_dollar_recipients = FALSE;
5651 /* Pause for a while waiting for input. If none received in that time,
5652 close the logfile, if we had one open; then if we wait for a long-running
5653 datasource (months, in one use-case) log rotation will not leave us holding
5656 if (!receive_timeout)
5658 struct timeval t = { .tv_sec = 30*60, .tv_usec = 0 }; /* 30 minutes */
5661 FD_ZERO(&r); FD_SET(0, &r);
5662 if (select(1, &r, NULL, NULL, &t) == 0) mainlog_close();
5665 /* Read the data for the message. If filter_test is not FTEST_NONE, this
5666 will just read the headers for the message, and not write anything onto the
5669 message_ended = END_NOTENDED;
5670 more = receive_msg(extract_recipients);
5672 /* more is always FALSE here (not SMTP message) when reading a message
5673 for real; when reading the headers of a message for filter testing,
5674 it is TRUE if the headers were terminated by '.' and FALSE otherwise. */
5676 if (message_id[0] == 0) exim_exit(EXIT_FAILURE);
5677 } /* Non-SMTP message reception */
5679 /* If this is a filter testing run, there are headers in store, but
5680 no message on the spool. Run the filtering code in testing mode, setting
5681 the domain to the qualify domain and the local part to the current user,
5682 unless they have been set by options. The prefix and suffix are left unset
5683 unless specified. The the return path is set to to the sender unless it has
5684 already been set from a return-path header in the message. */
5686 if (filter_test != FTEST_NONE)
5688 deliver_domain = ftest_domain ? ftest_domain : qualify_domain_recipient;
5689 deliver_domain_orig = deliver_domain;
5690 deliver_localpart = ftest_localpart ? ftest_localpart : originator_login;
5691 deliver_localpart_orig = deliver_localpart;
5692 deliver_localpart_prefix = ftest_prefix;
5693 deliver_localpart_suffix = ftest_suffix;
5694 deliver_home = originator_home;
5698 printf("Return-path copied from sender\n");
5699 return_path = string_copy(sender_address);
5702 printf("Return-path = %s\n", (return_path[0] == 0)? US"<>" : return_path);
5703 printf("Sender = %s\n", (sender_address[0] == 0)? US"<>" : sender_address);
5705 receive_add_recipient(
5706 string_sprintf("%s%s%s@%s",
5707 ftest_prefix ? ftest_prefix : US"",
5709 ftest_suffix ? ftest_suffix : US"",
5710 deliver_domain), -1);
5712 printf("Recipient = %s\n", recipients_list[0].address);
5713 if (ftest_prefix) printf("Prefix = %s\n", ftest_prefix);
5714 if (ftest_suffix) printf("Suffix = %s\n", ftest_suffix);
5716 if (chdir("/")) /* Get away from wherever the user is running this from */
5718 DEBUG(D_receive) debug_printf("chdir(\"/\") failed\n");
5719 exim_exit(EXIT_FAILURE);
5722 /* Now we run either a system filter test, or a user filter test, or both.
5723 In the latter case, headers added by the system filter will persist and be
5724 available to the user filter. We need to copy the filter variables
5727 if (filter_test & FTEST_SYSTEM)
5728 if (!filter_runtest(filter_sfd, filter_test_sfile, TRUE, more))
5729 exim_exit(EXIT_FAILURE);
5731 memcpy(filter_sn, filter_n, sizeof(filter_sn));
5733 if (filter_test & FTEST_USER)
5734 if (!filter_runtest(filter_ufd, filter_test_ufile, FALSE, more))
5735 exim_exit(EXIT_FAILURE);
5737 exim_exit(EXIT_SUCCESS);
5740 /* Else act on the result of message reception. We should not get here unless
5741 message_id[0] is non-zero. If queue_only is set, session_local_queue_only
5742 will be TRUE. If it is not, check on the number of messages received in this
5745 if ( !session_local_queue_only
5746 && smtp_accept_queue_per_connection > 0
5747 && receive_messagecount > smtp_accept_queue_per_connection)
5749 session_local_queue_only = TRUE;
5750 queue_only_reason = 2;
5753 /* Initialize local_queue_only from session_local_queue_only. If it is false,
5754 and queue_only_load is set, check that the load average is below it. If it is
5755 not, set local_queue_only TRUE. If queue_only_load_latch is true (the
5756 default), we put the whole session into queue_only mode. It then remains this
5757 way for any subsequent messages on the same SMTP connection. This is a
5758 deliberate choice; even though the load average may fall, it doesn't seem
5759 right to deliver later messages on the same call when not delivering earlier
5760 ones. However, there are odd cases where this is not wanted, so this can be
5761 changed by setting queue_only_load_latch false. */
5763 if (!(local_queue_only = session_local_queue_only) && queue_only_load >= 0)
5764 if ((local_queue_only = (load_average = OS_GETLOADAVG()) > queue_only_load))
5766 queue_only_reason = 3;
5767 if (queue_only_load_latch) session_local_queue_only = TRUE;
5770 /* If running as an MUA wrapper, all queueing options and freezing options
5774 local_queue_only = f.queue_only_policy = f.deliver_freeze = FALSE;
5776 /* Log the queueing here, when it will get a message id attached, but
5777 not if queue_only is set (case 0). Case 1 doesn't happen here (too many
5780 if (local_queue_only)
5782 cancel_cutthrough_connection(TRUE, US"no delivery; queueing");
5783 switch(queue_only_reason)
5786 log_write(L_delay_delivery,
5787 LOG_MAIN, "no immediate delivery: more than %d messages "
5788 "received in one connection", smtp_accept_queue_per_connection);
5792 log_write(L_delay_delivery,
5793 LOG_MAIN, "no immediate delivery: load average %.2f",
5794 (double)load_average/1000.0);
5799 else if (f.queue_only_policy || f.deliver_freeze)
5800 cancel_cutthrough_connection(TRUE, US"no delivery; queueing");
5802 /* Else do the delivery unless the ACL or local_scan() called for queue only
5803 or froze the message. Always deliver in a separate process. A fork failure is
5804 not a disaster, as the delivery will eventually happen on a subsequent queue
5805 run. The search cache must be tidied before the fork, as the parent will
5806 do it before exiting. The child will trigger a lookup failure and
5807 thereby defer the delivery if it tries to use (for example) a cached ldap
5808 connection that the parent has called unbind on. */
5815 if ((pid = exim_fork(US"local-accept-delivery")) == 0)
5818 close_unwanted(); /* Close unwanted file descriptors and TLS */
5819 exim_nullstd(); /* Ensure std{in,out,err} exist */
5821 /* Re-exec Exim if we need to regain privilege (note: in mua_wrapper
5822 mode, deliver_drop_privilege is forced TRUE). */
5824 if (geteuid() != root_uid && !deliver_drop_privilege && !unprivileged)
5826 delivery_re_exec(CEE_EXEC_EXIT);
5827 /* Control does not return here. */
5830 /* No need to re-exec */
5832 rc = deliver_message(message_id, FALSE, FALSE);
5834 exim_underbar_exit(!mua_wrapper || rc == DELIVER_MUA_SUCCEEDED
5835 ? EXIT_SUCCESS : EXIT_FAILURE);
5840 cancel_cutthrough_connection(TRUE, US"delivery fork failed");
5841 log_write(0, LOG_MAIN|LOG_PANIC, "failed to fork automatic delivery "
5842 "process: %s", strerror(errno));
5846 release_cutthrough_connection(US"msg passed for delivery");
5848 /* In the parent, wait if synchronous delivery is required. This will
5849 always be the case in MUA wrapper mode. */
5851 if (f.synchronous_delivery)
5854 while (wait(&status) != pid);
5855 if ((status & 0x00ff) != 0)
5856 log_write(0, LOG_MAIN|LOG_PANIC,
5857 "process %d crashed with signal %d while delivering %s",
5858 (int)pid, status & 0x00ff, message_id);
5859 if (mua_wrapper && (status & 0xffff) != 0) exim_exit(EXIT_FAILURE);
5864 /* The loop will repeat if more is TRUE. If we do not know know that the OS
5865 automatically reaps children (see comments above the loop), clear away any
5866 finished subprocesses here, in case there are lots of messages coming in
5867 from the same source. */
5869 #ifndef SIG_IGN_WORKS
5870 while (waitpid(-1, NULL, WNOHANG) > 0);
5874 return_path = sender_address = NULL;
5875 authenticated_sender = NULL;
5876 deliver_localpart_orig = NULL;
5877 deliver_domain_orig = NULL;
5878 deliver_host = deliver_host_address = NULL;
5879 dnslist_domain = dnslist_matched = NULL;
5880 #ifdef WITH_CONTENT_SCAN
5881 malware_name = NULL;
5883 callout_address = NULL;
5884 sending_ip_address = NULL;
5885 deliver_localpart_data = deliver_domain_data =
5886 recipient_data = sender_data = NULL;
5888 for(int i = 0; i < REGEX_VARS; i++) regex_vars[i] = NULL;
5890 store_reset(reset_point);
5893 exim_exit(EXIT_SUCCESS); /* Never returns */
5894 return 0; /* To stop compiler warning */