1 /*************************************************
2 * Exim - an Internet mail transport agent *
3 *************************************************/
5 /* Copyright (c) University of Cambridge 1995 - 2018 */
6 /* See the file NOTICE for conditions of use and distribution. */
9 /* The main function: entry point, initialization, and high-level control.
10 Also a few functions that don't naturally fit elsewhere. */
15 #if defined(__GLIBC__) && !defined(__UCLIBC__)
16 # include <gnu/libc-version.h>
20 # include <gnutls/gnutls.h>
21 # if GNUTLS_VERSION_NUMBER < 0x030103 && !defined(DISABLE_OCSP)
30 extern void init_lookup_list(void);
34 /*************************************************
35 * Function interface to store functions *
36 *************************************************/
38 /* We need some real functions to pass to the PCRE regular expression library
39 for store allocation via Exim's store manager. The normal calls are actually
40 macros that pass over location information to make tracing easier. These
41 functions just interface to the standard macro calls. A good compiler will
42 optimize out the tail recursion and so not make them too expensive. There
43 are two sets of functions; one for use when we want to retain the compiled
44 regular expression for a long time; the other for short-term use. */
47 function_store_get(size_t size)
49 /* For now, regard all RE results as potentially tainted. We might need
50 more intelligence on this point. */
51 return store_get((int)size, TRUE);
55 function_dummy_free(void *block) { block = block; }
58 function_store_malloc(size_t size)
60 return store_malloc((int)size);
64 function_store_free(void *block)
72 /*************************************************
73 * Enums for cmdline interface *
74 *************************************************/
76 enum commandline_info { CMDINFO_NONE=0,
77 CMDINFO_HELP, CMDINFO_SIEVE, CMDINFO_DSCP };
82 /*************************************************
83 * Compile regular expression and panic on fail *
84 *************************************************/
86 /* This function is called when failure to compile a regular expression leads
87 to a panic exit. In other cases, pcre_compile() is called directly. In many
88 cases where this function is used, the results of the compilation are to be
89 placed in long-lived store, so we temporarily reset the store management
90 functions that PCRE uses if the use_malloc flag is set.
93 pattern the pattern to compile
94 caseless TRUE if caseless matching is required
95 use_malloc TRUE if compile into malloc store
97 Returns: pointer to the compiled pattern
101 regex_must_compile(const uschar *pattern, BOOL caseless, BOOL use_malloc)
104 int options = PCRE_COPT;
109 pcre_malloc = function_store_malloc;
110 pcre_free = function_store_free;
112 if (caseless) options |= PCRE_CASELESS;
113 yield = pcre_compile(CCS pattern, options, CCSS &error, &offset, NULL);
114 pcre_malloc = function_store_get;
115 pcre_free = function_dummy_free;
117 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "regular expression error: "
118 "%s at offset %d while compiling %s", error, offset, pattern);
125 /*************************************************
126 * Execute regular expression and set strings *
127 *************************************************/
129 /* This function runs a regular expression match, and sets up the pointers to
130 the matched substrings.
133 re the compiled expression
134 subject the subject string
135 options additional PCRE options
136 setup if < 0 do full setup
137 if >= 0 setup from setup+1 onwards,
138 excluding the full matched string
140 Returns: TRUE or FALSE
144 regex_match_and_setup(const pcre *re, const uschar *subject, int options, int setup)
146 int ovector[3*(EXPAND_MAXN+1)];
147 uschar * s = string_copy(subject); /* de-constifying */
148 int n = pcre_exec(re, NULL, CS s, Ustrlen(s), 0,
149 PCRE_EOPT | options, ovector, nelem(ovector));
151 if (n == 0) n = EXPAND_MAXN + 1;
154 expand_nmax = setup < 0 ? 0 : setup + 1;
155 for (int nn = setup < 0 ? 0 : 2; nn < n*2; nn += 2)
157 expand_nstring[expand_nmax] = s + ovector[nn];
158 expand_nlength[expand_nmax++] = ovector[nn+1] - ovector[nn];
168 /*************************************************
169 * Set up processing details *
170 *************************************************/
172 /* Save a text string for dumping when SIGUSR1 is received.
173 Do checks for overruns.
175 Arguments: format and arguments, as for printf()
180 set_process_info(const char *format, ...)
182 gstring gs = { .size = PROCESS_INFO_SIZE - 2, .ptr = 0, .s = process_info };
187 g = string_fmt_append(&gs, "%5d ", (int)getpid());
189 va_start(ap, format);
190 if (!string_vformat(g, 0, format, ap))
193 g = string_cat(&gs, US"**** string overflowed buffer ****");
195 g = string_catn(g, US"\n", 1);
196 string_from_gstring(g);
197 process_info_len = g->ptr;
198 DEBUG(D_process_info) debug_printf("set_process_info: %s", process_info);
202 /***********************************************
203 * Handler for SIGTERM *
204 ***********************************************/
207 term_handler(int sig)
213 /*************************************************
214 * Handler for SIGUSR1 *
215 *************************************************/
217 /* SIGUSR1 causes any exim process to write to the process log details of
218 what it is currently doing. It will only be used if the OS is capable of
219 setting up a handler that causes automatic restarting of any system call
220 that is in progress at the time.
222 This function takes care to be signal-safe.
224 Argument: the signal number (SIGUSR1)
229 usr1_handler(int sig)
233 os_restarting_signal(sig, usr1_handler);
235 if ((fd = Uopen(process_log_path, O_APPEND|O_WRONLY, LOG_MODE)) < 0)
237 /* If we are already running as the Exim user, try to create it in the
238 current process (assuming spool_directory exists). Otherwise, if we are
239 root, do the creation in an exim:exim subprocess. */
241 int euid = geteuid();
242 if (euid == exim_uid)
243 fd = Uopen(process_log_path, O_CREAT|O_APPEND|O_WRONLY, LOG_MODE);
244 else if (euid == root_uid)
245 fd = log_create_as_exim(process_log_path);
248 /* If we are neither exim nor root, or if we failed to create the log file,
249 give up. There is not much useful we can do with errors, since we don't want
250 to disrupt whatever is going on outside the signal handler. */
254 (void)write(fd, process_info, process_info_len);
260 /*************************************************
262 *************************************************/
264 /* This handler is enabled most of the time that Exim is running. The handler
265 doesn't actually get used unless alarm() has been called to set a timer, to
266 place a time limit on a system call of some kind. When the handler is run, it
269 There are some other SIGALRM handlers that are used in special cases when more
270 than just a flag setting is required; for example, when reading a message's
271 input. These are normally set up in the code module that uses them, and the
272 SIGALRM handler is reset to this one afterwards.
274 Argument: the signal value (SIGALRM)
279 sigalrm_handler(int sig)
281 sig = sig; /* Keep picky compilers happy */
283 os_non_restarting_signal(SIGALRM, sigalrm_handler);
288 /*************************************************
289 * Sleep for a fractional time interval *
290 *************************************************/
292 /* This function is called by millisleep() and exim_wait_tick() to wait for a
293 period of time that may include a fraction of a second. The coding is somewhat
294 tedious. We do not expect setitimer() ever to fail, but if it does, the process
295 will wait for ever, so we panic in this instance. (There was a case of this
296 when a bug in a function that calls milliwait() caused it to pass invalid data.
297 That's when I added the check. :-)
299 We assume it to be not worth sleeping for under 50us; this value will
300 require revisiting as hardware advances. This avoids the issue of
301 a zero-valued timer setting meaning "never fire".
303 Argument: an itimerval structure containing the interval
308 milliwait(struct itimerval *itval)
311 sigset_t old_sigmask;
313 if (itval->it_value.tv_usec < 50 && itval->it_value.tv_sec == 0)
315 (void)sigemptyset(&sigmask); /* Empty mask */
316 (void)sigaddset(&sigmask, SIGALRM); /* Add SIGALRM */
317 (void)sigprocmask(SIG_BLOCK, &sigmask, &old_sigmask); /* Block SIGALRM */
318 if (setitimer(ITIMER_REAL, itval, NULL) < 0) /* Start timer */
319 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
320 "setitimer() failed: %s", strerror(errno));
321 (void)sigfillset(&sigmask); /* All signals */
322 (void)sigdelset(&sigmask, SIGALRM); /* Remove SIGALRM */
323 (void)sigsuspend(&sigmask); /* Until SIGALRM */
324 (void)sigprocmask(SIG_SETMASK, &old_sigmask, NULL); /* Restore mask */
330 /*************************************************
331 * Millisecond sleep function *
332 *************************************************/
334 /* The basic sleep() function has a granularity of 1 second, which is too rough
335 in some cases - for example, when using an increasing delay to slow down
338 Argument: number of millseconds
345 struct itimerval itval = {.it_interval = {.tv_sec = 0, .tv_usec = 0},
346 .it_value = {.tv_sec = msec/1000,
347 .tv_usec = (msec % 1000) * 1000}};
353 /*************************************************
354 * Compare microsecond times *
355 *************************************************/
362 Returns: -1, 0, or +1
366 exim_tvcmp(struct timeval *t1, struct timeval *t2)
368 if (t1->tv_sec > t2->tv_sec) return +1;
369 if (t1->tv_sec < t2->tv_sec) return -1;
370 if (t1->tv_usec > t2->tv_usec) return +1;
371 if (t1->tv_usec < t2->tv_usec) return -1;
378 /*************************************************
379 * Clock tick wait function *
380 *************************************************/
382 #ifdef _POSIX_MONOTONIC_CLOCK
383 /* Amount CLOCK_MONOTONIC is behind realtime, at startup. */
384 static struct timespec offset_ts;
387 exim_clock_init(void)
390 if (clock_gettime(CLOCK_MONOTONIC, &offset_ts) != 0) return;
391 (void)gettimeofday(&tv, NULL);
392 offset_ts.tv_sec = tv.tv_sec - offset_ts.tv_sec;
393 offset_ts.tv_nsec = tv.tv_usec * 1000 - offset_ts.tv_nsec;
394 if (offset_ts.tv_nsec >= 0) return;
396 offset_ts.tv_nsec += 1000*1000*1000;
401 /* Exim uses a time + a pid to generate a unique identifier in two places: its
402 message IDs, and in file names for maildir deliveries. Because some OS now
403 re-use pids within the same second, sub-second times are now being used.
404 However, for absolute certainty, we must ensure the clock has ticked before
405 allowing the relevant process to complete. At the time of implementation of
406 this code (February 2003), the speed of processors is such that the clock will
407 invariably have ticked already by the time a process has done its job. This
408 function prepares for the time when things are faster - and it also copes with
409 clocks that go backwards.
412 tgt_tv A timeval which was used to create uniqueness; its usec field
413 has been rounded down to the value of the resolution.
414 We want to be sure the current time is greater than this.
415 resolution The resolution that was used to divide the microseconds
416 (1 for maildir, larger for message ids)
422 exim_wait_tick(struct timeval * tgt_tv, int resolution)
424 struct timeval now_tv;
425 long int now_true_usec;
427 #ifdef _POSIX_MONOTONIC_CLOCK
428 struct timespec now_ts;
430 if (clock_gettime(CLOCK_MONOTONIC, &now_ts) == 0)
432 now_ts.tv_sec += offset_ts.tv_sec;
433 if ((now_ts.tv_nsec += offset_ts.tv_nsec) >= 1000*1000*1000)
436 now_ts.tv_nsec -= 1000*1000*1000;
438 now_tv.tv_sec = now_ts.tv_sec;
439 now_true_usec = (now_ts.tv_nsec / (resolution * 1000)) * resolution;
440 now_tv.tv_usec = now_true_usec;
445 (void)gettimeofday(&now_tv, NULL);
446 now_true_usec = now_tv.tv_usec;
447 now_tv.tv_usec = (now_true_usec/resolution) * resolution;
450 while (exim_tvcmp(&now_tv, tgt_tv) <= 0)
452 struct itimerval itval;
453 itval.it_interval.tv_sec = 0;
454 itval.it_interval.tv_usec = 0;
455 itval.it_value.tv_sec = tgt_tv->tv_sec - now_tv.tv_sec;
456 itval.it_value.tv_usec = tgt_tv->tv_usec + resolution - now_true_usec;
458 /* We know that, overall, "now" is less than or equal to "then". Therefore, a
459 negative value for the microseconds is possible only in the case when "now"
460 is more than a second less than "tgt". That means that itval.it_value.tv_sec
461 is greater than zero. The following correction is therefore safe. */
463 if (itval.it_value.tv_usec < 0)
465 itval.it_value.tv_usec += 1000000;
466 itval.it_value.tv_sec -= 1;
469 DEBUG(D_transport|D_receive)
471 if (!f.running_in_test_harness)
473 debug_printf("tick check: " TIME_T_FMT ".%06lu " TIME_T_FMT ".%06lu\n",
474 tgt_tv->tv_sec, (long) tgt_tv->tv_usec,
475 now_tv.tv_sec, (long) now_tv.tv_usec);
476 debug_printf("waiting " TIME_T_FMT ".%06lu sec\n",
477 itval.it_value.tv_sec, (long) itval.it_value.tv_usec);
483 /* Be prapared to go around if the kernel does not implement subtick
484 granularity (GNU Hurd) */
486 (void)gettimeofday(&now_tv, NULL);
487 now_true_usec = now_tv.tv_usec;
488 now_tv.tv_usec = (now_true_usec/resolution) * resolution;
495 /*************************************************
496 * Call fopen() with umask 777 and adjust mode *
497 *************************************************/
499 /* Exim runs with umask(0) so that files created with open() have the mode that
500 is specified in the open() call. However, there are some files, typically in
501 the spool directory, that are created with fopen(). They end up world-writeable
502 if no precautions are taken. Although the spool directory is not accessible to
503 the world, this is an untidiness. So this is a wrapper function for fopen()
504 that sorts out the mode of the created file.
507 filename the file name
508 options the fopen() options
509 mode the required mode
511 Returns: the fopened FILE or NULL
515 modefopen(const uschar *filename, const char *options, mode_t mode)
517 mode_t saved_umask = umask(0777);
518 FILE *f = Ufopen(filename, options);
519 (void)umask(saved_umask);
520 if (f != NULL) (void)fchmod(fileno(f), mode);
525 /*************************************************
526 * Ensure stdin, stdout, and stderr exist *
527 *************************************************/
529 /* Some operating systems grumble if an exec() happens without a standard
530 input, output, and error (fds 0, 1, 2) being defined. The worry is that some
531 file will be opened and will use these fd values, and then some other bit of
532 code will assume, for example, that it can write error messages to stderr.
533 This function ensures that fds 0, 1, and 2 are open if they do not already
534 exist, by connecting them to /dev/null.
536 This function is also used to ensure that std{in,out,err} exist at all times,
537 so that if any library that Exim calls tries to use them, it doesn't crash.
548 for (int i = 0; i <= 2; i++)
550 if (fstat(i, &statbuf) < 0 && errno == EBADF)
552 if (devnull < 0) devnull = open("/dev/null", O_RDWR);
553 if (devnull < 0) log_write(0, LOG_MAIN|LOG_PANIC_DIE, "%s",
554 string_open_failed(errno, "/dev/null", NULL));
555 if (devnull != i) (void)dup2(devnull, i);
558 if (devnull > 2) (void)close(devnull);
564 /*************************************************
565 * Close unwanted file descriptors for delivery *
566 *************************************************/
568 /* This function is called from a new process that has been forked to deliver
569 an incoming message, either directly, or using exec.
571 We want any smtp input streams to be closed in this new process. However, it
572 has been observed that using fclose() here causes trouble. When reading in -bS
573 input, duplicate copies of messages have been seen. The files will be sharing a
574 file pointer with the parent process, and it seems that fclose() (at least on
575 some systems - I saw this on Solaris 2.5.1) messes with that file pointer, at
576 least sometimes. Hence we go for closing the underlying file descriptors.
578 If TLS is active, we want to shut down the TLS library, but without molesting
579 the parent's SSL connection.
581 For delivery of a non-SMTP message, we want to close stdin and stdout (and
582 stderr unless debugging) because the calling process might have set them up as
583 pipes and be waiting for them to close before it waits for the submission
584 process to terminate. If they aren't closed, they hold up the calling process
585 until the initial delivery process finishes, which is not what we want.
587 Exception: We do want it for synchronous delivery!
589 And notwithstanding all the above, if D_resolver is set, implying resolver
590 debugging, leave stdout open, because that's where the resolver writes its
593 When we close stderr (which implies we've also closed stdout), we also get rid
594 of any controlling terminal.
606 tls_close(NULL, TLS_NO_SHUTDOWN); /* Shut down the TLS library */
608 (void)close(fileno(smtp_in));
609 (void)close(fileno(smtp_out));
614 (void)close(0); /* stdin */
615 if ((debug_selector & D_resolver) == 0) (void)close(1); /* stdout */
616 if (debug_selector == 0) /* stderr */
618 if (!f.synchronous_delivery)
631 /*************************************************
633 *************************************************/
635 /* This function sets a new uid and gid permanently, optionally calling
636 initgroups() to set auxiliary groups. There are some special cases when running
637 Exim in unprivileged modes. In these situations the effective uid will not be
638 root; if we already have the right effective uid/gid, and don't need to
639 initialize any groups, leave things as they are.
644 igflag TRUE if initgroups() wanted
645 msg text to use in debugging output and failure log
647 Returns: nothing; bombs out on failure
651 exim_setugid(uid_t uid, gid_t gid, BOOL igflag, uschar *msg)
653 uid_t euid = geteuid();
654 gid_t egid = getegid();
656 if (euid == root_uid || euid != uid || egid != gid || igflag)
658 /* At least one OS returns +1 for initgroups failure, so just check for
663 struct passwd *pw = getpwuid(uid);
665 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "cannot run initgroups(): "
666 "no passwd entry for uid=%ld", (long int)uid);
668 if (initgroups(pw->pw_name, gid) != 0)
669 log_write(0,LOG_MAIN|LOG_PANIC_DIE,"initgroups failed for uid=%ld: %s",
670 (long int)uid, strerror(errno));
673 if (setgid(gid) < 0 || setuid(uid) < 0)
674 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "unable to set gid=%ld or uid=%ld "
675 "(euid=%ld): %s", (long int)gid, (long int)uid, (long int)euid, msg);
678 /* Debugging output included uid/gid and all groups */
682 int group_count, save_errno;
683 gid_t group_list[EXIM_GROUPLIST_SIZE];
684 debug_printf("changed uid/gid: %s\n uid=%ld gid=%ld pid=%ld\n", msg,
685 (long int)geteuid(), (long int)getegid(), (long int)getpid());
686 group_count = getgroups(nelem(group_list), group_list);
688 debug_printf(" auxiliary group list:");
690 for (int i = 0; i < group_count; i++) debug_printf(" %d", (int)group_list[i]);
691 else if (group_count < 0)
692 debug_printf(" <error: %s>", strerror(save_errno));
693 else debug_printf(" <none>");
701 /*************************************************
703 *************************************************/
705 /* Exim exits via this function so that it always clears up any open
711 Returns: does not return
715 exim_exit(int rc, const uschar * process)
720 debug_printf(">>>>>>>>>>>>>>>> Exim pid=%d %s%s%sterminating with rc=%d "
721 ">>>>>>>>>>>>>>>>\n", (int)getpid(),
722 process ? "(" : "", process, process ? ") " : "", rc);
728 exim_underbar_exit(int rc, const uschar * process)
732 debug_printf(">>>>>>>>>>>>>>>> Exim pid=%d %s%s%sterminating with rc=%d "
733 ">>>>>>>>>>>>>>>>\n", (int)getpid(),
734 process ? "(" : "", process, process ? ") " : "", rc);
740 /* Print error string, then die */
742 exim_fail(const char * fmt, ...)
746 vfprintf(stderr, fmt, ap);
750 /* exim_chown_failure() called from exim_chown()/exim_fchown() on failure
751 of chown()/fchown(). See src/functions.h for more explanation */
753 exim_chown_failure(int fd, const uschar *name, uid_t owner, gid_t group)
755 int saved_errno = errno; /* from the preceeding chown call */
757 log_write(0, LOG_MAIN|LOG_PANIC,
758 __FILE__ ":%d: chown(%s, %d:%d) failed (%s)."
759 " Please contact the authors and refer to https://bugs.exim.org/show_bug.cgi?id=2391",
760 __LINE__, name?name:US"<unknown>", owner, group, strerror(errno));
762 /* I leave this here, commented, in case the "bug"(?) comes up again.
763 It is not an Exim bug, but we can provide a workaround.
769 if (0 == (fd < 0 ? stat(name, &buf) : fstat(fd, &buf)))
771 if (buf.st_uid == owner && buf.st_gid == group) return 0;
772 log_write(0, LOG_MAIN|LOG_PANIC, "Wrong ownership on %s", name);
774 else log_write(0, LOG_MAIN|LOG_PANIC, "Stat failed on %s: %s", name, strerror(errno));
782 /*************************************************
783 * Extract port from host address *
784 *************************************************/
786 /* Called to extract the port from the values given to -oMa and -oMi.
787 It also checks the syntax of the address, and terminates it before the
788 port data when a port is extracted.
791 address the address, with possible port on the end
793 Returns: the port, or zero if there isn't one
794 bombs out on a syntax error
798 check_port(uschar *address)
800 int port = host_address_extract_port(address);
801 if (string_is_ip_address(address, NULL) == 0)
802 exim_fail("exim abandoned: \"%s\" is not an IP address\n", address);
808 /*************************************************
809 * Test/verify an address *
810 *************************************************/
812 /* This function is called by the -bv and -bt code. It extracts a working
813 address from a full RFC 822 address. This isn't really necessary per se, but it
814 has the effect of collapsing source routes.
818 flags flag bits for verify_address()
819 exit_value to be set for failures
825 test_address(uschar *s, int flags, int *exit_value)
827 int start, end, domain;
828 uschar *parse_error = NULL;
829 uschar *address = parse_extract_address(s, &parse_error, &start, &end, &domain,
833 fprintf(stdout, "syntax error: %s\n", parse_error);
838 int rc = verify_address(deliver_make_addr(address,TRUE), stdout, flags, -1,
839 -1, -1, NULL, NULL, NULL);
840 if (rc == FAIL) *exit_value = 2;
841 else if (rc == DEFER && *exit_value == 0) *exit_value = 1;
847 /*************************************************
848 * Show supported features *
849 *************************************************/
852 show_db_version(FILE * f)
854 #ifdef DB_VERSION_STRING
857 fprintf(f, "Library version: BDB: Compile: %s\n", DB_VERSION_STRING);
858 fprintf(f, " Runtime: %s\n",
859 db_version(NULL, NULL, NULL));
862 fprintf(f, "Berkeley DB: %s\n", DB_VERSION_STRING);
864 #elif defined(BTREEVERSION) && defined(HASHVERSION)
866 fprintf(f, "Probably Berkeley DB version 1.8x (native mode)\n");
868 fprintf(f, "Probably Berkeley DB version 1.8x (compatibility mode)\n");
871 #elif defined(_DBM_RDONLY) || defined(dbm_dirfno)
872 fprintf(f, "Probably ndbm\n");
873 #elif defined(USE_TDB)
874 fprintf(f, "Using tdb\n");
877 fprintf(f, "Probably GDBM (native mode)\n");
879 fprintf(f, "Probably GDBM (compatibility mode)\n");
885 /* This function is called for -bV/--version and for -d to output the optional
886 features of the current Exim binary.
888 Arguments: a FILE for printing
893 show_whats_supported(FILE * fp)
895 DEBUG(D_any) {} else show_db_version(fp);
897 fprintf(fp, "Support for:");
898 #ifdef SUPPORT_CRYPTEQ
899 fprintf(fp, " crypteq");
902 fprintf(fp, " iconv()");
905 fprintf(fp, " IPv6");
907 #ifdef HAVE_SETCLASSRESOURCES
908 fprintf(fp, " use_setclassresources");
914 fprintf(fp, " Perl");
917 fprintf(fp, " Expand_dlfunc");
919 #ifdef USE_TCP_WRAPPERS
920 fprintf(fp, " TCPwrappers");
923 fprintf(fp, " GnuTLS");
926 fprintf(fp, " OpenSSL");
928 #ifdef SUPPORT_TRANSLATE_IP_ADDRESS
929 fprintf(fp, " translate_ip_address");
931 #ifdef SUPPORT_MOVE_FROZEN_MESSAGES
932 fprintf(fp, " move_frozen_messages");
934 #ifdef WITH_CONTENT_SCAN
935 fprintf(fp, " Content_Scanning");
938 fprintf(fp, " DANE");
941 fprintf(fp, " DKIM");
943 #ifndef DISABLE_DNSSEC
944 fprintf(fp, " DNSSEC");
946 #ifndef DISABLE_EVENT
947 fprintf(fp, " Event");
950 fprintf(fp, " I18N");
953 fprintf(fp, " OCSP");
955 #ifndef DISABLE_PIPE_CONNECT
956 fprintf(fp, " PIPE_CONNECT");
959 fprintf(fp, " PRDR");
962 fprintf(fp, " PROXY");
965 fprintf(fp, " SOCKS");
971 fprintf(fp, " DMARC");
975 if (f.tcp_fastopen_ok) fprintf(fp, " TCP_Fast_Open");
977 #ifdef EXPERIMENTAL_ARC
978 fprintf(fp, " Experimental_ARC");
980 #ifdef EXPERIMENTAL_BRIGHTMAIL
981 fprintf(fp, " Experimental_Brightmail");
983 #ifdef EXPERIMENTAL_DCC
984 fprintf(fp, " Experimental_DCC");
986 #ifdef EXPERIMENTAL_DSN_INFO
987 fprintf(fp, " Experimental_DSN_info");
989 #ifdef EXPERIMENTAL_LMDB
990 fprintf(fp, " Experimental_LMDB");
992 #ifdef EXPERIMENTAL_QUEUE_RAMP
993 fprintf(fp, " Experimental_Queue_Ramp");
995 #ifdef EXPERIMENTAL_QUEUEFILE
996 fprintf(fp, " Experimental_QUEUEFILE");
998 #if defined(EXPERIMENTAL_SRS) || defined(EXPERIMENTAL_SRS_NATIVE)
999 fprintf(fp, " Experimental_SRS");
1001 #ifdef EXPERIMENTAL_TLS_RESUME
1002 fprintf(fp, " Experimental_TLS_resume");
1006 fprintf(fp, "Lookups (built-in):");
1007 #if defined(LOOKUP_LSEARCH) && LOOKUP_LSEARCH!=2
1008 fprintf(fp, " lsearch wildlsearch nwildlsearch iplsearch");
1010 #if defined(LOOKUP_CDB) && LOOKUP_CDB!=2
1011 fprintf(fp, " cdb");
1013 #if defined(LOOKUP_DBM) && LOOKUP_DBM!=2
1014 fprintf(fp, " dbm dbmjz dbmnz");
1016 #if defined(LOOKUP_DNSDB) && LOOKUP_DNSDB!=2
1017 fprintf(fp, " dnsdb");
1019 #if defined(LOOKUP_DSEARCH) && LOOKUP_DSEARCH!=2
1020 fprintf(fp, " dsearch");
1022 #if defined(LOOKUP_IBASE) && LOOKUP_IBASE!=2
1023 fprintf(fp, " ibase");
1025 #if defined(LOOKUP_JSON) && LOOKUP_JSON!=2
1026 fprintf(fp, " json");
1028 #if defined(LOOKUP_LDAP) && LOOKUP_LDAP!=2
1029 fprintf(fp, " ldap ldapdn ldapm");
1031 #ifdef EXPERIMENTAL_LMDB
1032 fprintf(fp, " lmdb");
1034 #if defined(LOOKUP_MYSQL) && LOOKUP_MYSQL!=2
1035 fprintf(fp, " mysql");
1037 #if defined(LOOKUP_NIS) && LOOKUP_NIS!=2
1038 fprintf(fp, " nis nis0");
1040 #if defined(LOOKUP_NISPLUS) && LOOKUP_NISPLUS!=2
1041 fprintf(fp, " nisplus");
1043 #if defined(LOOKUP_ORACLE) && LOOKUP_ORACLE!=2
1044 fprintf(fp, " oracle");
1046 #if defined(LOOKUP_PASSWD) && LOOKUP_PASSWD!=2
1047 fprintf(fp, " passwd");
1049 #if defined(LOOKUP_PGSQL) && LOOKUP_PGSQL!=2
1050 fprintf(fp, " pgsql");
1052 #if defined(LOOKUP_REDIS) && LOOKUP_REDIS!=2
1053 fprintf(fp, " redis");
1055 #if defined(LOOKUP_SQLITE) && LOOKUP_SQLITE!=2
1056 fprintf(fp, " sqlite");
1058 #if defined(LOOKUP_TESTDB) && LOOKUP_TESTDB!=2
1059 fprintf(fp, " testdb");
1061 #if defined(LOOKUP_WHOSON) && LOOKUP_WHOSON!=2
1062 fprintf(fp, " whoson");
1066 auth_show_supported(fp);
1067 route_show_supported(fp);
1068 transport_show_supported(fp);
1070 #ifdef WITH_CONTENT_SCAN
1071 malware_show_supported(fp);
1074 if (fixed_never_users[0] > 0)
1077 fprintf(fp, "Fixed never_users: ");
1078 for (i = 1; i <= (int)fixed_never_users[0] - 1; i++)
1079 fprintf(fp, "%d:", (unsigned int)fixed_never_users[i]);
1080 fprintf(fp, "%d\n", (unsigned int)fixed_never_users[i]);
1083 fprintf(fp, "Configure owner: %d:%d\n", config_uid, config_gid);
1085 fprintf(fp, "Size of off_t: " SIZE_T_FMT "\n", sizeof(off_t));
1087 /* Everything else is details which are only worth reporting when debugging.
1088 Perhaps the tls_version_report should move into this too. */
1091 /* clang defines __GNUC__ (at least, for me) so test for it first */
1092 #if defined(__clang__)
1093 fprintf(fp, "Compiler: CLang [%s]\n", __clang_version__);
1094 #elif defined(__GNUC__)
1095 fprintf(fp, "Compiler: GCC [%s]\n",
1099 "? unknown version ?"
1103 fprintf(fp, "Compiler: <unknown>\n");
1106 #if defined(__GLIBC__) && !defined(__UCLIBC__)
1107 fprintf(fp, "Library version: Glibc: Compile: %d.%d\n",
1108 __GLIBC__, __GLIBC_MINOR__);
1109 if (__GLIBC_PREREQ(2, 1))
1110 fprintf(fp, " Runtime: %s\n",
1111 gnu_get_libc_version());
1114 show_db_version(fp);
1117 tls_version_report(fp);
1120 utf8_version_report(fp);
1123 spf_lib_version_report(fp);
1126 for (auth_info * authi = auths_available; *authi->driver_name != '\0'; ++authi)
1127 if (authi->version_report)
1128 (*authi->version_report)(fp);
1130 /* PCRE_PRERELEASE is either defined and empty or a bare sequence of
1131 characters; unless it's an ancient version of PCRE in which case it
1133 #ifndef PCRE_PRERELEASE
1134 # define PCRE_PRERELEASE
1137 #define EXPAND_AND_QUOTE(X) QUOTE(X)
1138 fprintf(fp, "Library version: PCRE: Compile: %d.%d%s\n"
1140 PCRE_MAJOR, PCRE_MINOR,
1141 EXPAND_AND_QUOTE(PCRE_PRERELEASE) "",
1144 #undef EXPAND_AND_QUOTE
1147 for (int i = 0; i < lookup_list_count; i++)
1148 if (lookup_list[i]->version_report)
1149 lookup_list[i]->version_report(fp);
1151 #ifdef WHITELIST_D_MACROS
1152 fprintf(fp, "WHITELIST_D_MACROS: \"%s\"\n", WHITELIST_D_MACROS);
1154 fprintf(fp, "WHITELIST_D_MACROS unset\n");
1156 #ifdef TRUSTED_CONFIG_LIST
1157 fprintf(fp, "TRUSTED_CONFIG_LIST: \"%s\"\n", TRUSTED_CONFIG_LIST);
1159 fprintf(fp, "TRUSTED_CONFIG_LIST unset\n");
1166 /*************************************************
1167 * Show auxiliary information about Exim *
1168 *************************************************/
1171 show_exim_information(enum commandline_info request, FILE *stream)
1176 fprintf(stream, "Oops, something went wrong.\n");
1180 "The -bI: flag takes a string indicating which information to provide.\n"
1181 "If the string is not recognised, you'll get this help (on stderr).\n"
1183 " exim -bI:help this information\n"
1184 " exim -bI:dscp list of known dscp value keywords\n"
1185 " exim -bI:sieve list of supported sieve extensions\n"
1189 for (const uschar ** pp = exim_sieve_extension_list; *pp; ++pp)
1190 fprintf(stream, "%s\n", *pp);
1193 dscp_list_to_stream(stream);
1199 /*************************************************
1200 * Quote a local part *
1201 *************************************************/
1203 /* This function is used when a sender address or a From: or Sender: header
1204 line is being created from the caller's login, or from an authenticated_id. It
1205 applies appropriate quoting rules for a local part.
1207 Argument: the local part
1208 Returns: the local part, quoted if necessary
1212 local_part_quote(uschar *lpart)
1214 BOOL needs_quote = FALSE;
1217 for (uschar * t = lpart; !needs_quote && *t != 0; t++)
1219 needs_quote = !isalnum(*t) && strchr("!#$%&'*+-/=?^_`{|}~", *t) == NULL &&
1220 (*t != '.' || t == lpart || t[1] == 0);
1223 if (!needs_quote) return lpart;
1225 g = string_catn(NULL, US"\"", 1);
1229 uschar *nq = US Ustrpbrk(lpart, "\\\"");
1232 g = string_cat(g, lpart);
1235 g = string_catn(g, lpart, nq - lpart);
1236 g = string_catn(g, US"\\", 1);
1237 g = string_catn(g, nq, 1);
1241 g = string_catn(g, US"\"", 1);
1242 return string_from_gstring(g);
1248 /*************************************************
1249 * Load readline() functions *
1250 *************************************************/
1252 /* This function is called from testing executions that read data from stdin,
1253 but only when running as the calling user. Currently, only -be does this. The
1254 function loads the readline() function library and passes back the functions.
1255 On some systems, it needs the curses library, so load that too, but try without
1256 it if loading fails. All this functionality has to be requested at build time.
1259 fn_readline_ptr pointer to where to put the readline pointer
1260 fn_addhist_ptr pointer to where to put the addhistory function
1262 Returns: the dlopen handle or NULL on failure
1266 set_readline(char * (**fn_readline_ptr)(const char *),
1267 void (**fn_addhist_ptr)(const char *))
1270 void *dlhandle_curses = dlopen("libcurses." DYNLIB_FN_EXT, RTLD_GLOBAL|RTLD_LAZY);
1272 dlhandle = dlopen("libreadline." DYNLIB_FN_EXT, RTLD_GLOBAL|RTLD_NOW);
1273 if (dlhandle_curses) dlclose(dlhandle_curses);
1277 /* Checked manual pages; at least in GNU Readline 6.1, the prototypes are:
1278 * char * readline (const char *prompt);
1279 * void add_history (const char *string);
1281 *fn_readline_ptr = (char *(*)(const char*))dlsym(dlhandle, "readline");
1282 *fn_addhist_ptr = (void(*)(const char*))dlsym(dlhandle, "add_history");
1285 DEBUG(D_any) debug_printf("failed to load readline: %s\n", dlerror());
1293 /*************************************************
1294 * Get a line from stdin for testing things *
1295 *************************************************/
1297 /* This function is called when running tests that can take a number of lines
1298 of input (for example, -be and -bt). It handles continuations and trailing
1299 spaces. And prompting and a blank line output on eof. If readline() is in use,
1300 the arguments are non-NULL and provide the relevant functions.
1303 fn_readline readline function or NULL
1304 fn_addhist addhist function or NULL
1306 Returns: pointer to dynamic memory, or NULL at end of file
1310 get_stdinput(char *(*fn_readline)(const char *), void(*fn_addhist)(const char *))
1314 if (!fn_readline) { printf("> "); fflush(stdout); }
1316 for (int i = 0;; i++)
1318 uschar buffer[1024];
1322 char *readline_line = NULL;
1325 if (!(readline_line = fn_readline((i > 0)? "":"> "))) break;
1326 if (*readline_line != 0 && fn_addhist) fn_addhist(readline_line);
1327 p = US readline_line;
1332 /* readline() not in use */
1335 if (Ufgets(buffer, sizeof(buffer), stdin) == NULL) break;
1339 /* Handle the line */
1341 ss = p + (int)Ustrlen(p);
1342 while (ss > p && isspace(ss[-1])) ss--;
1345 while (p < ss && isspace(*p)) p++; /* leading space after cont */
1347 g = string_catn(g, p, ss - p);
1350 if (fn_readline) free(readline_line);
1353 /* g can only be NULL if ss==p */
1354 if (ss == p || g->s[g->ptr-1] != '\\')
1358 (void) string_from_gstring(g);
1361 if (!g) printf("\n");
1362 return string_from_gstring(g);
1367 /*************************************************
1368 * Output usage information for the program *
1369 *************************************************/
1371 /* This function is called when there are no recipients
1372 or a specific --help argument was added.
1375 progname information on what name we were called by
1377 Returns: DOES NOT RETURN
1381 exim_usage(uschar *progname)
1384 /* Handle specific program invocation variants */
1385 if (Ustrcmp(progname, US"-mailq") == 0)
1387 "mailq - list the contents of the mail queue\n\n"
1388 "For a list of options, see the Exim documentation.\n");
1390 /* Generic usage - we output this whatever happens */
1392 "Exim is a Mail Transfer Agent. It is normally called by Mail User Agents,\n"
1393 "not directly from a shell command line. Options and/or arguments control\n"
1394 "what it does when called. For a list of options, see the Exim documentation.\n");
1399 /*************************************************
1400 * Validate that the macros given are okay *
1401 *************************************************/
1403 /* Typically, Exim will drop privileges if macros are supplied. In some
1404 cases, we want to not do so.
1406 Arguments: opt_D_used - true if the commandline had a "-D" option
1407 Returns: true if trusted, false otherwise
1411 macros_trusted(BOOL opt_D_used)
1413 #ifdef WHITELIST_D_MACROS
1414 uschar *whitelisted, *end, *p, **whites;
1415 int white_count, i, n;
1417 BOOL prev_char_item, found;
1422 #ifndef WHITELIST_D_MACROS
1426 /* We only trust -D overrides for some invoking users:
1427 root, the exim run-time user, the optional config owner user.
1428 I don't know why config-owner would be needed, but since they can own the
1429 config files anyway, there's no security risk to letting them override -D. */
1430 if ( ! ((real_uid == root_uid)
1431 || (real_uid == exim_uid)
1432 #ifdef CONFIGURE_OWNER
1433 || (real_uid == config_uid)
1437 debug_printf("macros_trusted rejecting macros for uid %d\n", (int) real_uid);
1441 /* Get a list of macros which are whitelisted */
1442 whitelisted = string_copy_perm(US WHITELIST_D_MACROS, FALSE);
1443 prev_char_item = FALSE;
1445 for (p = whitelisted; *p != '\0'; ++p)
1447 if (*p == ':' || isspace(*p))
1452 prev_char_item = FALSE;
1455 if (!prev_char_item)
1456 prev_char_item = TRUE;
1463 whites = store_malloc(sizeof(uschar *) * (white_count+1));
1464 for (p = whitelisted, i = 0; (p != end) && (i < white_count); ++p)
1469 if (i == white_count)
1471 while (*p != '\0' && p < end)
1477 /* The list of commandline macros should be very short.
1478 Accept the N*M complexity. */
1479 for (macro_item * m = macros_user; m; m = m->next) if (m->command_line)
1482 for (uschar ** w = whites; *w; ++w)
1483 if (Ustrcmp(*w, m->name) == 0)
1490 if (!m->replacement)
1492 if ((len = m->replen) == 0)
1494 n = pcre_exec(regex_whitelisted_macro, NULL, CS m->replacement, len,
1495 0, PCRE_EOPT, NULL, 0);
1498 if (n != PCRE_ERROR_NOMATCH)
1499 debug_printf("macros_trusted checking %s returned %d\n", m->name, n);
1503 DEBUG(D_any) debug_printf("macros_trusted overridden to true by whitelisting\n");
1509 /*************************************************
1510 * Expansion testing *
1511 *************************************************/
1513 /* Expand and print one item, doing macro-processing.
1516 item line for expansion
1520 expansion_test_line(uschar * line)
1525 Ustrncpy(big_buffer, line, big_buffer_size);
1526 big_buffer[big_buffer_size-1] = '\0';
1527 len = Ustrlen(big_buffer);
1529 (void) macros_expand(0, &len, &dummy_macexp);
1531 if (isupper(big_buffer[0]))
1533 if (macro_read_assignment(big_buffer))
1534 printf("Defined macro '%s'\n", mlast->name);
1537 if ((line = expand_string(big_buffer))) printf("%s\n", CS line);
1538 else printf("Failed: %s\n", expand_string_message);
1543 /*************************************************
1544 * Entry point and high-level code *
1545 *************************************************/
1547 /* Entry point for the Exim mailer. Analyse the arguments and arrange to take
1548 the appropriate action. All the necessary functions are present in the one
1549 binary. I originally thought one should split it up, but it turns out that so
1550 much of the apparatus is needed in each chunk that one might as well just have
1551 it all available all the time, which then makes the coding easier as well.
1554 argc count of entries in argv
1555 argv argument strings, with argv[0] being the program name
1557 Returns: EXIT_SUCCESS if terminated successfully
1558 EXIT_FAILURE otherwise, except when a message has been sent
1559 to the sender, and -oee was given
1563 main(int argc, char **cargv)
1565 uschar **argv = USS cargv;
1566 int arg_receive_timeout = -1;
1567 int arg_smtp_receive_timeout = -1;
1568 int arg_error_handling = error_handling;
1569 int filter_sfd = -1;
1570 int filter_ufd = -1;
1573 int list_queue_option = 0;
1575 int msg_action_arg = -1;
1576 int namelen = (argv[0] == NULL)? 0 : Ustrlen(argv[0]);
1577 int queue_only_reason = 0;
1579 int perl_start_option = 0;
1581 int recipients_arg = argc;
1582 int sender_address_domain = 0;
1583 int test_retry_arg = -1;
1584 int test_rewrite_arg = -1;
1585 gid_t original_egid;
1586 BOOL arg_queue_only = FALSE;
1587 BOOL bi_option = FALSE;
1588 BOOL checking = FALSE;
1589 BOOL count_queue = FALSE;
1590 BOOL expansion_test = FALSE;
1591 BOOL extract_recipients = FALSE;
1592 BOOL flag_G = FALSE;
1593 BOOL flag_n = FALSE;
1594 BOOL forced_delivery = FALSE;
1595 BOOL f_end_dot = FALSE;
1596 BOOL deliver_give_up = FALSE;
1597 BOOL list_queue = FALSE;
1598 BOOL list_options = FALSE;
1599 BOOL list_config = FALSE;
1600 BOOL local_queue_only;
1602 BOOL one_msg_action = FALSE;
1603 BOOL opt_D_used = FALSE;
1604 BOOL queue_only_set = FALSE;
1605 BOOL receiving_message = TRUE;
1606 BOOL sender_ident_set = FALSE;
1607 BOOL session_local_queue_only;
1609 BOOL removed_privilege = FALSE;
1610 BOOL usage_wanted = FALSE;
1611 BOOL verify_address_mode = FALSE;
1612 BOOL verify_as_sender = FALSE;
1613 BOOL version_printed = FALSE;
1614 uschar *alias_arg = NULL;
1615 uschar *called_as = US"";
1616 uschar *cmdline_syslog_name = NULL;
1617 uschar *start_queue_run_id = NULL;
1618 uschar *stop_queue_run_id = NULL;
1619 uschar *expansion_test_message = NULL;
1620 uschar *ftest_domain = NULL;
1621 uschar *ftest_localpart = NULL;
1622 uschar *ftest_prefix = NULL;
1623 uschar *ftest_suffix = NULL;
1624 uschar *log_oneline = NULL;
1625 uschar *malware_test_file = NULL;
1626 uschar *real_sender_address;
1627 uschar *originator_home = US"/";
1632 struct stat statbuf;
1633 pid_t passed_qr_pid = (pid_t)0;
1634 int passed_qr_pipe = -1;
1635 gid_t group_list[EXIM_GROUPLIST_SIZE];
1637 /* For the -bI: flag */
1638 enum commandline_info info_flag = CMDINFO_NONE;
1639 BOOL info_stdout = FALSE;
1641 /* Possible options for -R and -S */
1643 static uschar *rsopts[] = { US"f", US"ff", US"r", US"rf", US"rff" };
1645 /* Need to define this in case we need to change the environment in order
1646 to get rid of a bogus time zone. We have to make it char rather than uschar
1647 because some OS define it in /usr/include/unistd.h. */
1649 extern char **environ;
1651 #ifdef MEASURE_TIMING
1652 (void)gettimeofday(×tamp_startup, NULL);
1655 /* If the Exim user and/or group and/or the configuration file owner/group were
1656 defined by ref:name at build time, we must now find the actual uid/gid values.
1657 This is a feature to make the lives of binary distributors easier. */
1659 #ifdef EXIM_USERNAME
1660 if (route_finduser(US EXIM_USERNAME, &pw, &exim_uid))
1663 exim_fail("exim: refusing to run with uid 0 for \"%s\"\n", EXIM_USERNAME);
1665 /* If ref:name uses a number as the name, route_finduser() returns
1666 TRUE with exim_uid set and pw coerced to NULL. */
1668 exim_gid = pw->pw_gid;
1669 #ifndef EXIM_GROUPNAME
1672 "exim: ref:name should specify a usercode, not a group.\n"
1673 "exim: can't let you get away with it unless you also specify a group.\n");
1677 exim_fail("exim: failed to find uid for user name \"%s\"\n", EXIM_USERNAME);
1680 #ifdef EXIM_GROUPNAME
1681 if (!route_findgroup(US EXIM_GROUPNAME, &exim_gid))
1682 exim_fail("exim: failed to find gid for group name \"%s\"\n", EXIM_GROUPNAME);
1685 #ifdef CONFIGURE_OWNERNAME
1686 if (!route_finduser(US CONFIGURE_OWNERNAME, NULL, &config_uid))
1687 exim_fail("exim: failed to find uid for user name \"%s\"\n",
1688 CONFIGURE_OWNERNAME);
1691 /* We default the system_filter_user to be the Exim run-time user, as a
1692 sane non-root value. */
1693 system_filter_uid = exim_uid;
1695 #ifdef CONFIGURE_GROUPNAME
1696 if (!route_findgroup(US CONFIGURE_GROUPNAME, &config_gid))
1697 exim_fail("exim: failed to find gid for group name \"%s\"\n",
1698 CONFIGURE_GROUPNAME);
1701 /* In the Cygwin environment, some initialization used to need doing.
1702 It was fudged in by means of this macro; now no longer but we'll leave
1703 it in case of others. */
1709 /* Check a field which is patched when we are running Exim within its
1710 testing harness; do a fast initial check, and then the whole thing. */
1712 f.running_in_test_harness =
1713 *running_status == '<' && Ustrcmp(running_status, "<<<testing>>>") == 0;
1714 if (f.running_in_test_harness)
1717 /* The C standard says that the equivalent of setlocale(LC_ALL, "C") is obeyed
1718 at the start of a program; however, it seems that some environments do not
1719 follow this. A "strange" locale can affect the formatting of timestamps, so we
1722 setlocale(LC_ALL, "C");
1724 /* Get the offset between CLOCK_MONOTONIC and wallclock */
1726 #ifdef _POSIX_MONOTONIC_CLOCK
1730 /* Set up the default handler for timing using alarm(). */
1732 os_non_restarting_signal(SIGALRM, sigalrm_handler);
1734 /* Ensure we have a buffer for constructing log entries. Use malloc directly,
1735 because store_malloc writes a log entry on failure. */
1737 if (!(log_buffer = US malloc(LOG_BUFFER_SIZE)))
1738 exim_fail("exim: failed to get store for log buffer\n");
1740 /* Initialize the default log options. */
1742 bits_set(log_selector, log_selector_size, log_default);
1744 /* Set log_stderr to stderr, provided that stderr exists. This gets reset to
1745 NULL when the daemon is run and the file is closed. We have to use this
1746 indirection, because some systems don't allow writing to the variable "stderr".
1749 if (fstat(fileno(stderr), &statbuf) >= 0) log_stderr = stderr;
1751 /* Arrange for the PCRE regex library to use our store functions. Note that
1752 the normal calls are actually macros that add additional arguments for
1753 debugging purposes so we have to assign specially constructed functions here.
1754 The default is to use store in the stacking pool, but this is overridden in the
1755 regex_must_compile() function. */
1757 pcre_malloc = function_store_get;
1758 pcre_free = function_dummy_free;
1760 /* Ensure there is a big buffer for temporary use in several places. It is put
1761 in malloc store so that it can be freed for enlargement if necessary. */
1763 big_buffer = store_malloc(big_buffer_size);
1765 /* Set up the handler for the data request signal, and set the initial
1766 descriptive text. */
1768 process_info = store_get(PROCESS_INFO_SIZE, TRUE); /* tainted */
1769 set_process_info("initializing");
1770 os_restarting_signal(SIGUSR1, usr1_handler);
1772 /* If running in a dockerized environment, the TERM signal is only
1773 delegated to the PID 1 if we request it by setting an signal handler */
1774 if (getpid() == 1) signal(SIGTERM, term_handler);
1776 /* SIGHUP is used to get the daemon to reconfigure. It gets set as appropriate
1777 in the daemon code. For the rest of Exim's uses, we ignore it. */
1779 signal(SIGHUP, SIG_IGN);
1781 /* We don't want to die on pipe errors as the code is written to handle
1782 the write error instead. */
1784 signal(SIGPIPE, SIG_IGN);
1786 /* Under some circumstance on some OS, Exim can get called with SIGCHLD
1787 set to SIG_IGN. This causes subprocesses that complete before the parent
1788 process waits for them not to hang around, so when Exim calls wait(), nothing
1789 is there. The wait() code has been made robust against this, but let's ensure
1790 that SIGCHLD is set to SIG_DFL, because it's tidier to wait and get a process
1791 ending status. We use sigaction rather than plain signal() on those OS where
1792 SA_NOCLDWAIT exists, because we want to be sure it is turned off. (There was a
1793 problem on AIX with this.) */
1797 struct sigaction act;
1798 act.sa_handler = SIG_DFL;
1799 sigemptyset(&(act.sa_mask));
1801 sigaction(SIGCHLD, &act, NULL);
1804 signal(SIGCHLD, SIG_DFL);
1807 /* Save the arguments for use if we re-exec exim as a daemon after receiving
1812 /* Set up the version number. Set up the leading 'E' for the external form of
1813 message ids, set the pointer to the internal form, and initialize it to
1814 indicate no message being processed. */
1817 message_id_option[0] = '-';
1818 message_id_external = message_id_option + 1;
1819 message_id_external[0] = 'E';
1820 message_id = message_id_external + 1;
1823 /* Set the umask to zero so that any files Exim creates using open() are
1824 created with the modes that it specifies. NOTE: Files created with fopen() have
1825 a problem, which was not recognized till rather late (February 2006). With this
1826 umask, such files will be world writeable. (They are all content scanning files
1827 in the spool directory, which isn't world-accessible, so this is not a
1828 disaster, but it's untidy.) I don't want to change this overall setting,
1829 however, because it will interact badly with the open() calls. Instead, there's
1830 now a function called modefopen() that fiddles with the umask while calling
1835 /* Precompile the regular expression for matching a message id. Keep this in
1836 step with the code that generates ids in the accept.c module. We need to do
1837 this here, because the -M options check their arguments for syntactic validity
1838 using mac_ismsgid, which uses this. */
1841 regex_must_compile(US"^(?:[^\\W_]{6}-){2}[^\\W_]{2}$", FALSE, TRUE);
1843 /* Precompile the regular expression that is used for matching an SMTP error
1844 code, possibly extended, at the start of an error message. Note that the
1845 terminating whitespace character is included. */
1848 regex_must_compile(US"^\\d\\d\\d\\s(?:\\d\\.\\d\\d?\\d?\\.\\d\\d?\\d?\\s)?",
1851 #ifdef WHITELIST_D_MACROS
1852 /* Precompile the regular expression used to filter the content of macros
1853 given to -D for permissibility. */
1855 regex_whitelisted_macro =
1856 regex_must_compile(US"^[A-Za-z0-9_/.-]*$", FALSE, TRUE);
1859 for (i = 0; i < REGEX_VARS; i++) regex_vars[i] = NULL;
1861 /* If the program is called as "mailq" treat it as equivalent to "exim -bp";
1862 this seems to be a generally accepted convention, since one finds symbolic
1863 links called "mailq" in standard OS configurations. */
1865 if ((namelen == 5 && Ustrcmp(argv[0], "mailq") == 0) ||
1866 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/mailq", 6) == 0))
1869 receiving_message = FALSE;
1870 called_as = US"-mailq";
1873 /* If the program is called as "rmail" treat it as equivalent to
1874 "exim -i -oee", thus allowing UUCP messages to be input using non-SMTP mode,
1875 i.e. preventing a single dot on a line from terminating the message, and
1876 returning with zero return code, even in cases of error (provided an error
1877 message has been sent). */
1879 if ((namelen == 5 && Ustrcmp(argv[0], "rmail") == 0) ||
1880 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/rmail", 6) == 0))
1883 called_as = US"-rmail";
1884 errors_sender_rc = EXIT_SUCCESS;
1887 /* If the program is called as "rsmtp" treat it as equivalent to "exim -bS";
1888 this is a smail convention. */
1890 if ((namelen == 5 && Ustrcmp(argv[0], "rsmtp") == 0) ||
1891 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/rsmtp", 6) == 0))
1893 smtp_input = smtp_batched_input = TRUE;
1894 called_as = US"-rsmtp";
1897 /* If the program is called as "runq" treat it as equivalent to "exim -q";
1898 this is a smail convention. */
1900 if ((namelen == 4 && Ustrcmp(argv[0], "runq") == 0) ||
1901 (namelen > 4 && Ustrncmp(argv[0] + namelen - 5, "/runq", 5) == 0))
1904 receiving_message = FALSE;
1905 called_as = US"-runq";
1908 /* If the program is called as "newaliases" treat it as equivalent to
1909 "exim -bi"; this is a sendmail convention. */
1911 if ((namelen == 10 && Ustrcmp(argv[0], "newaliases") == 0) ||
1912 (namelen > 10 && Ustrncmp(argv[0] + namelen - 11, "/newaliases", 11) == 0))
1915 receiving_message = FALSE;
1916 called_as = US"-newaliases";
1919 /* Save the original effective uid for a couple of uses later. It should
1920 normally be root, but in some esoteric environments it may not be. */
1922 original_euid = geteuid();
1923 original_egid = getegid();
1925 /* Get the real uid and gid. If the caller is root, force the effective uid/gid
1926 to be the same as the real ones. This makes a difference only if Exim is setuid
1927 (or setgid) to something other than root, which could be the case in some
1928 special configurations. */
1930 real_uid = getuid();
1931 real_gid = getgid();
1933 if (real_uid == root_uid)
1935 if ((rv = setgid(real_gid)))
1936 exim_fail("exim: setgid(%ld) failed: %s\n",
1937 (long int)real_gid, strerror(errno));
1938 if ((rv = setuid(real_uid)))
1939 exim_fail("exim: setuid(%ld) failed: %s\n",
1940 (long int)real_uid, strerror(errno));
1943 /* If neither the original real uid nor the original euid was root, Exim is
1944 running in an unprivileged state. */
1946 unprivileged = (real_uid != root_uid && original_euid != root_uid);
1948 /* Scan the program's arguments. Some can be dealt with right away; others are
1949 simply recorded for checking and handling afterwards. Do a high-level switch
1950 on the second character (the one after '-'), to save some effort. */
1952 for (i = 1; i < argc; i++)
1954 BOOL badarg = FALSE;
1955 uschar *arg = argv[i];
1959 /* An argument not starting with '-' is the start of a recipients list;
1960 break out of the options-scanning loop. */
1968 /* An option consisting of -- terminates the options */
1970 if (Ustrcmp(arg, "--") == 0)
1972 recipients_arg = i + 1;
1976 /* Handle flagged options */
1978 switchchar = arg[1];
1981 /* Make all -ex options synonymous with -oex arguments, since that
1982 is assumed by various callers. Also make -qR options synonymous with -R
1983 options, as that seems to be required as well. Allow for -qqR too, and
1984 the same for -S options. */
1986 if (Ustrncmp(arg+1, "oe", 2) == 0 ||
1987 Ustrncmp(arg+1, "qR", 2) == 0 ||
1988 Ustrncmp(arg+1, "qS", 2) == 0)
1990 switchchar = arg[2];
1993 else if (Ustrncmp(arg+1, "qqR", 3) == 0 || Ustrncmp(arg+1, "qqS", 3) == 0)
1995 switchchar = arg[3];
1997 f.queue_2stage = TRUE;
2000 /* Make -r synonymous with -f, since it is a documented alias */
2002 else if (arg[1] == 'r') switchchar = 'f';
2004 /* Make -ov synonymous with -v */
2006 else if (Ustrcmp(arg, "-ov") == 0)
2012 /* deal with --option_aliases */
2013 else if (switchchar == '-')
2015 if (Ustrcmp(argrest, "help") == 0)
2017 usage_wanted = TRUE;
2020 else if (Ustrcmp(argrest, "version") == 0)
2027 /* High-level switch on active initial letter */
2032 /* sendmail uses -Ac and -Am to control which .cf file is used;
2035 if (*argrest == '\0') { badarg = TRUE; break; }
2038 BOOL ignore = FALSE;
2043 if (*(argrest + 1) == '\0')
2047 if (!ignore) badarg = TRUE;
2051 /* -Btype is a sendmail option for 7bit/8bit setting. Exim is 8-bit clean
2052 so has no need of it. */
2055 if (!*argrest) i++; /* Skip over the type */
2061 receiving_message = FALSE; /* Reset TRUE for -bm, -bS, -bs below */
2065 /* -bd: Run in daemon mode, awaiting SMTP connections.
2066 -bdf: Ditto, but in the foreground.
2069 f.daemon_listen = TRUE;
2070 if (*argrest == 'f') f.background_daemon = FALSE;
2071 else if (*argrest) badarg = TRUE;
2074 /* -be: Run in expansion test mode
2075 -bem: Ditto, but read a message from a file first
2078 expansion_test = checking = TRUE;
2079 if (*argrest == 'm')
2081 if (++i >= argc) { badarg = TRUE; break; }
2082 expansion_test_message = argv[i];
2085 if (*argrest) badarg = TRUE;
2088 /* -bF: Run system filter test */
2090 filter_test |= checking = FTEST_SYSTEM;
2091 if (*argrest) { badarg = TRUE; break; }
2092 if (++i < argc) filter_test_sfile = argv[i]; else
2093 exim_fail("exim: file name expected after %s\n", argv[i-1]);
2096 /* -bf: Run user filter test
2097 -bfd: Set domain for filter testing
2098 -bfl: Set local part for filter testing
2099 -bfp: Set prefix for filter testing
2100 -bfs: Set suffix for filter testing
2105 filter_test |= checking = FTEST_USER;
2106 if (++i < argc) filter_test_ufile = argv[i];
2107 else exim_fail("exim: file name expected after %s\n", argv[i-1]);
2112 exim_fail("exim: string expected after %s\n", arg);
2113 if (Ustrcmp(argrest, "d") == 0) ftest_domain = argv[i];
2114 else if (Ustrcmp(argrest, "l") == 0) ftest_localpart = argv[i];
2115 else if (Ustrcmp(argrest, "p") == 0) ftest_prefix = argv[i];
2116 else if (Ustrcmp(argrest, "s") == 0) ftest_suffix = argv[i];
2121 /* -bh: Host checking - an IP address must follow. */
2123 if (!*argrest || Ustrcmp(argrest, "c") == 0)
2125 if (++i >= argc) { badarg = TRUE; break; }
2126 sender_host_address = argv[i];
2127 host_checking = checking = f.log_testing_mode = TRUE;
2128 f.host_checking_callout = *argrest == 'c';
2129 message_logs = FALSE;
2134 /* -bi: This option is used by sendmail to initialize *the* alias file,
2135 though it has the -oA option to specify a different file. Exim has no
2136 concept of *the* alias file, but since Sun's YP make script calls
2137 sendmail this way, some support must be provided. */
2139 if (!*++argrest) bi_option = TRUE;
2143 /* -bI: provide information, of the type to follow after a colon.
2144 This is an Exim flag. */
2146 if (Ustrlen(argrest) >= 1 && *argrest == ':')
2148 uschar *p = argrest+1;
2149 info_flag = CMDINFO_HELP;
2151 if (strcmpic(p, CUS"sieve") == 0)
2153 info_flag = CMDINFO_SIEVE;
2156 else if (strcmpic(p, CUS"dscp") == 0)
2158 info_flag = CMDINFO_DSCP;
2161 else if (strcmpic(p, CUS"help") == 0)
2167 /* -bm: Accept and deliver message - the default option. Reinstate
2168 receiving_message, which got turned off for all -b options.
2169 -bmalware: test the filename given for malware */
2171 if (!*argrest) receiving_message = TRUE;
2172 else if (Ustrcmp(argrest, "alware") == 0)
2174 if (++i >= argc) { badarg = TRUE; break; }
2176 malware_test_file = argv[i];
2181 /* -bnq: For locally originating messages, do not qualify unqualified
2182 addresses. In the envelope, this causes errors; in header lines they
2185 if (Ustrcmp(argrest, "q") == 0)
2187 f.allow_unqualified_sender = FALSE;
2188 f.allow_unqualified_recipient = FALSE;
2193 /* -bpxx: List the contents of the mail queue, in various forms. If
2194 the option is -bpc, just a queue count is needed. Otherwise, if the
2195 first letter after p is r, then order is random. */
2197 if (*argrest == 'c')
2200 if (*++argrest) badarg = TRUE;
2204 if (*argrest == 'r')
2206 list_queue_option = 8;
2209 else list_queue_option = 0;
2213 /* -bp: List the contents of the mail queue, top-level only */
2217 /* -bpu: List the contents of the mail queue, top-level undelivered */
2219 else if (Ustrcmp(argrest, "u") == 0) list_queue_option += 1;
2221 /* -bpa: List the contents of the mail queue, including all delivered */
2223 else if (Ustrcmp(argrest, "a") == 0) list_queue_option += 2;
2225 /* Unknown after -bp[r] */
2231 /* -bP: List the configuration variables given as the address list.
2232 Force -v, so configuration errors get displayed. */
2235 /* -bP config: we need to setup here, because later,
2236 * when list_options is checked, the config is read already */
2239 else if (argv[i+1] && Ustrcmp(argv[i+1], "config") == 0)
2242 readconf_save_config(version_string);
2246 list_options = TRUE;
2247 debug_selector |= D_v;
2248 debug_file = stderr;
2252 /* -brt: Test retry configuration lookup */
2254 if (Ustrcmp(argrest, "t") == 0)
2257 test_retry_arg = i + 1;
2261 /* -brw: Test rewrite configuration */
2263 else if (Ustrcmp(argrest, "w") == 0)
2266 test_rewrite_arg = i + 1;
2272 /* -bS: Read SMTP commands on standard input, but produce no replies -
2273 all errors are reported by sending messages. */
2276 smtp_input = smtp_batched_input = receiving_message = TRUE;
2280 /* -bs: Read SMTP commands on standard input and produce SMTP replies
2281 on standard output. */
2283 if (!*argrest) smtp_input = receiving_message = TRUE;
2287 /* -bt: address testing mode */
2290 f.address_test_mode = checking = f.log_testing_mode = TRUE;
2294 /* -bv: verify addresses */
2297 verify_address_mode = checking = f.log_testing_mode = TRUE;
2299 /* -bvs: verify sender addresses */
2301 else if (Ustrcmp(argrest, "s") == 0)
2303 verify_address_mode = checking = f.log_testing_mode = TRUE;
2304 verify_as_sender = TRUE;
2309 /* -bV: Print version string and support details */
2313 printf("Exim version %s #%s built %s\n", version_string,
2314 version_cnumber, version_date);
2315 printf("%s\n", CS version_copyright);
2316 version_printed = TRUE;
2317 show_whats_supported(stdout);
2318 f.log_testing_mode = TRUE;
2323 /* -bw: inetd wait mode, accept a listening socket as stdin */
2325 f.inetd_wait_mode = TRUE;
2326 f.background_daemon = FALSE;
2327 f.daemon_listen = TRUE;
2329 if ((inetd_wait_timeout = readconf_readtime(argrest, 0, FALSE)) <= 0)
2330 exim_fail("exim: bad time value %s: abandoned\n", argv[i]);
2341 /* -C: change configuration file list; ignore if it isn't really
2342 a change! Enforce a prefix check if required. */
2347 if(++i < argc) argrest = argv[i]; else
2348 { badarg = TRUE; break; }
2350 if (Ustrcmp(config_main_filelist, argrest) != 0)
2352 #ifdef ALT_CONFIG_PREFIX
2354 int len = Ustrlen(ALT_CONFIG_PREFIX);
2355 const uschar *list = argrest;
2357 while((filename = string_nextinlist(&list, &sep, big_buffer,
2358 big_buffer_size)) != NULL)
2360 if ((Ustrlen(filename) < len ||
2361 Ustrncmp(filename, ALT_CONFIG_PREFIX, len) != 0 ||
2362 Ustrstr(filename, "/../") != NULL) &&
2363 (Ustrcmp(filename, "/dev/null") != 0 || real_uid != root_uid))
2364 exim_fail("-C Permission denied\n");
2367 if (real_uid != root_uid)
2369 #ifdef TRUSTED_CONFIG_LIST
2371 if (real_uid != exim_uid
2372 #ifdef CONFIGURE_OWNER
2373 && real_uid != config_uid
2376 f.trusted_config = FALSE;
2379 FILE *trust_list = Ufopen(TRUSTED_CONFIG_LIST, "rb");
2382 struct stat statbuf;
2384 if (fstat(fileno(trust_list), &statbuf) != 0 ||
2385 (statbuf.st_uid != root_uid /* owner not root */
2386 #ifdef CONFIGURE_OWNER
2387 && statbuf.st_uid != config_uid /* owner not the special one */
2390 (statbuf.st_gid != root_gid /* group not root */
2391 #ifdef CONFIGURE_GROUP
2392 && statbuf.st_gid != config_gid /* group not the special one */
2394 && (statbuf.st_mode & 020) != 0 /* group writeable */
2396 (statbuf.st_mode & 2) != 0) /* world writeable */
2398 f.trusted_config = FALSE;
2403 /* Well, the trust list at least is up to scratch... */
2404 rmark reset_point = store_mark();
2405 uschar *trusted_configs[32];
2409 while (Ufgets(big_buffer, big_buffer_size, trust_list))
2411 uschar *start = big_buffer, *nl;
2412 while (*start && isspace(*start))
2416 nl = Ustrchr(start, '\n');
2419 trusted_configs[nr_configs++] = string_copy(start);
2420 if (nr_configs == 32)
2428 const uschar *list = argrest;
2430 while (f.trusted_config && (filename = string_nextinlist(&list,
2431 &sep, big_buffer, big_buffer_size)) != NULL)
2433 for (i=0; i < nr_configs; i++)
2434 if (Ustrcmp(filename, trusted_configs[i]) == 0)
2436 if (i == nr_configs)
2438 f.trusted_config = FALSE;
2443 else /* No valid prefixes found in trust_list file. */
2444 f.trusted_config = FALSE;
2445 store_reset(reset_point);
2448 else /* Could not open trust_list file. */
2449 f.trusted_config = FALSE;
2452 /* Not root; don't trust config */
2453 f.trusted_config = FALSE;
2457 config_main_filelist = argrest;
2458 f.config_changed = TRUE;
2463 /* -D: set up a macro definition */
2466 #ifdef DISABLE_D_OPTION
2467 exim_fail("exim: -D is not available in this Exim binary\n");
2473 uschar *s = argrest;
2476 while (isspace(*s)) s++;
2478 if (*s < 'A' || *s > 'Z')
2479 exim_fail("exim: macro name set by -D must start with "
2480 "an upper case letter\n");
2482 while (isalnum(*s) || *s == '_')
2484 if (ptr < sizeof(name)-1) name[ptr++] = *s;
2488 if (ptr == 0) { badarg = TRUE; break; }
2489 while (isspace(*s)) s++;
2492 if (*s++ != '=') { badarg = TRUE; break; }
2493 while (isspace(*s)) s++;
2496 for (m = macros_user; m; m = m->next)
2497 if (Ustrcmp(m->name, name) == 0)
2498 exim_fail("exim: duplicated -D in command line\n");
2500 m = macro_create(name, s, TRUE);
2502 if (clmacro_count >= MAX_CLMACROS)
2503 exim_fail("exim: too many -D options on command line\n");
2504 clmacros[clmacro_count++] =
2505 string_sprintf("-D%s=%s", m->name, m->replacement);
2510 /* -d: Set debug level (see also -v below) or set the drop_cr option.
2511 The latter is now a no-op, retained for compatibility only. If -dd is used,
2512 debugging subprocesses of the daemon is disabled. */
2515 if (Ustrcmp(argrest, "ropcr") == 0)
2517 /* drop_cr = TRUE; */
2520 /* Use an intermediate variable so that we don't set debugging while
2521 decoding the debugging bits. */
2525 unsigned int selector = D_default;
2528 if (*argrest == 'd')
2530 f.debug_daemon = TRUE;
2534 decode_bits(&selector, 1, debug_notall, argrest,
2535 debug_options, debug_options_count, US"debug", 0);
2536 debug_selector = selector;
2541 /* -E: This is a local error message. This option is not intended for
2542 external use at all, but is not restricted to trusted callers because it
2543 does no harm (just suppresses certain error messages) and if Exim is run
2544 not setuid root it won't always be trusted when it generates error
2545 messages using this option. If there is a message id following -E, point
2546 message_reference at it, for logging. */
2549 f.local_error_message = TRUE;
2550 if (mac_ismsgid(argrest)) message_reference = argrest;
2554 /* -ex: The vacation program calls sendmail with the undocumented "-eq"
2555 option, so it looks as if historically the -oex options are also callable
2556 without the leading -o. So we have to accept them. Before the switch,
2557 anything starting -oe has been converted to -e. Exim does not support all
2558 of the sendmail error options. */
2561 if (Ustrcmp(argrest, "e") == 0)
2563 arg_error_handling = ERRORS_SENDER;
2564 errors_sender_rc = EXIT_SUCCESS;
2566 else if (Ustrcmp(argrest, "m") == 0) arg_error_handling = ERRORS_SENDER;
2567 else if (Ustrcmp(argrest, "p") == 0) arg_error_handling = ERRORS_STDERR;
2568 else if (Ustrcmp(argrest, "q") == 0) arg_error_handling = ERRORS_STDERR;
2569 else if (Ustrcmp(argrest, "w") == 0) arg_error_handling = ERRORS_SENDER;
2574 /* -F: Set sender's full name, used instead of the gecos entry from
2575 the password file. Since users can usually alter their gecos entries,
2576 there's no security involved in using this instead. The data can follow
2577 the -F or be in the next argument. */
2582 if(++i < argc) argrest = argv[i]; else
2583 { badarg = TRUE; break; }
2585 originator_name = argrest;
2586 f.sender_name_forced = TRUE;
2590 /* -f: Set sender's address - this value is only actually used if Exim is
2591 run by a trusted user, or if untrusted_set_sender is set and matches the
2592 address, except that the null address can always be set by any user. The
2593 test for this happens later, when the value given here is ignored when not
2594 permitted. For an untrusted user, the actual sender is still put in Sender:
2595 if it doesn't match the From: header (unless no_local_from_check is set).
2596 The data can follow the -f or be in the next argument. The -r switch is an
2597 obsolete form of -f but since there appear to be programs out there that
2598 use anything that sendmail has ever supported, better accept it - the
2599 synonymizing is done before the switch above.
2601 At this stage, we must allow domain literal addresses, because we don't
2602 know what the setting of allow_domain_literals is yet. Ditto for trailing
2603 dots and strip_trailing_dot. */
2607 int dummy_start, dummy_end;
2611 if (i+1 < argc) argrest = argv[++i]; else
2612 { badarg = TRUE; break; }
2615 *(sender_address = store_get(1, FALSE)) = '\0'; /* Ensure writeable memory */
2618 uschar *temp = argrest + Ustrlen(argrest) - 1;
2619 while (temp >= argrest && isspace(*temp)) temp--;
2620 if (temp >= argrest && *temp == '.') f_end_dot = TRUE;
2621 allow_domain_literals = TRUE;
2622 strip_trailing_dot = TRUE;
2624 allow_utf8_domains = TRUE;
2626 sender_address = parse_extract_address(argrest, &errmess,
2627 &dummy_start, &dummy_end, &sender_address_domain, TRUE);
2628 sender_address = string_copy_taint(sender_address, TRUE);
2630 message_smtputf8 = string_is_utf8(sender_address);
2631 allow_utf8_domains = FALSE;
2633 allow_domain_literals = FALSE;
2634 strip_trailing_dot = FALSE;
2635 if (!sender_address)
2636 exim_fail("exim: bad -f address \"%s\": %s\n", argrest, errmess);
2638 f.sender_address_forced = TRUE;
2642 /* -G: sendmail invocation to specify that it's a gateway submission and
2643 sendmail may complain about problems instead of fixing them.
2644 We make it equivalent to an ACL "control = suppress_local_fixups" and do
2645 not at this time complain about problems. */
2651 /* -h: Set the hop count for an incoming message. Exim does not currently
2652 support this; it always computes it by counting the Received: headers.
2653 To put it in will require a change to the spool header file format. */
2658 if(++i < argc) argrest = argv[i]; else
2659 { badarg = TRUE; break; }
2661 if (!isdigit(*argrest)) badarg = TRUE;
2665 /* -i: Set flag so dot doesn't end non-SMTP input (same as -oi, seems
2666 not to be documented for sendmail but mailx (at least) uses it) */
2669 if (*argrest == 0) f.dot_ends = FALSE; else badarg = TRUE;
2673 /* -L: set the identifier used for syslog; equivalent to setting
2674 syslog_processname in the config file, but needs to be an admin option. */
2677 if (*argrest == '\0')
2679 if(++i < argc) argrest = argv[i]; else
2680 { badarg = TRUE; break; }
2682 if ((sz = Ustrlen(argrest)) > 32)
2683 exim_fail("exim: the -L syslog name is too long: \"%s\"\n", argrest);
2685 exim_fail("exim: the -L syslog name is too short\n");
2686 cmdline_syslog_name = argrest;
2690 receiving_message = FALSE;
2692 /* -MC: continue delivery of another message via an existing open
2693 file descriptor. This option is used for an internal call by the
2694 smtp transport when there is a pending message waiting to go to an
2695 address to which it has got a connection. Five subsequent arguments are
2696 required: transport name, host name, IP address, sequence number, and
2697 message_id. Transports may decline to create new processes if the sequence
2698 number gets too big. The channel is stdin. This (-MC) must be the last
2699 argument. There's a subsequent check that the real-uid is privileged.
2701 If we are running in the test harness. delay for a bit, to let the process
2702 that set this one up complete. This makes for repeatability of the logging,
2705 if (Ustrcmp(argrest, "C") == 0)
2707 union sockaddr_46 interface_sock;
2708 EXIM_SOCKLEN_T size = sizeof(interface_sock);
2711 exim_fail("exim: too many or too few arguments after -MC\n");
2713 if (msg_action_arg >= 0)
2714 exim_fail("exim: incompatible arguments\n");
2716 continue_transport = argv[++i];
2717 continue_hostname = argv[++i];
2718 continue_host_address = argv[++i];
2719 continue_sequence = Uatoi(argv[++i]);
2720 msg_action = MSG_DELIVER;
2721 msg_action_arg = ++i;
2722 forced_delivery = TRUE;
2723 queue_run_pid = passed_qr_pid;
2724 queue_run_pipe = passed_qr_pipe;
2726 if (!mac_ismsgid(argv[i]))
2727 exim_fail("exim: malformed message id %s after -MC option\n",
2730 /* Set up $sending_ip_address and $sending_port, unless proxied */
2732 if (!continue_proxy_cipher)
2733 if (getsockname(fileno(stdin), (struct sockaddr *)(&interface_sock),
2735 sending_ip_address = host_ntoa(-1, &interface_sock, NULL,
2738 exim_fail("exim: getsockname() failed after -MC option: %s\n",
2741 testharness_pause_ms(500);
2745 else if (*argrest == 'C' && argrest[1] && !argrest[2])
2749 /* -MCA: set the smtp_authenticated flag; this is useful only when it
2750 precedes -MC (see above). The flag indicates that the host to which
2751 Exim is connected has accepted an AUTH sequence. */
2753 case 'A': f.smtp_authenticated = TRUE; break;
2755 /* -MCD: set the smtp_use_dsn flag; this indicates that the host
2756 that exim is connected to supports the esmtp extension DSN */
2758 case 'D': smtp_peer_options |= OPTION_DSN; break;
2760 /* -MCG: set the queue name, to a non-default value */
2762 case 'G': if (++i < argc) queue_name = string_copy(argv[i]);
2766 /* -MCK: the peer offered CHUNKING. Must precede -MC */
2768 case 'K': smtp_peer_options |= OPTION_CHUNKING; break;
2770 /* -MCP: set the smtp_use_pipelining flag; this is useful only when
2771 it preceded -MC (see above) */
2773 case 'P': smtp_peer_options |= OPTION_PIPE; break;
2775 /* -MCQ: pass on the pid of the queue-running process that started
2776 this chain of deliveries and the fd of its synchronizing pipe; this
2777 is useful only when it precedes -MC (see above) */
2779 case 'Q': if (++i < argc) passed_qr_pid = (pid_t)(Uatol(argv[i]));
2781 if (++i < argc) passed_qr_pipe = (int)(Uatol(argv[i]));
2785 /* -MCS: set the smtp_use_size flag; this is useful only when it
2786 precedes -MC (see above) */
2788 case 'S': smtp_peer_options |= OPTION_SIZE; break;
2791 /* -MCt: similar to -MCT below but the connection is still open
2792 via a proxy process which handles the TLS context and coding.
2793 Require three arguments for the proxied local address and port,
2794 and the TLS cipher. */
2796 case 't': if (++i < argc) sending_ip_address = argv[i];
2798 if (++i < argc) sending_port = (int)(Uatol(argv[i]));
2800 if (++i < argc) continue_proxy_cipher = argv[i];
2804 /* -MCT: set the tls_offered flag; this is useful only when it
2805 precedes -MC (see above). The flag indicates that the host to which
2806 Exim is connected has offered TLS support. */
2808 case 'T': smtp_peer_options |= OPTION_TLS; break;
2811 default: badarg = TRUE; break;
2816 /* -M[x]: various operations on the following list of message ids:
2817 -M deliver the messages, ignoring next retry times and thawing
2818 -Mc deliver the messages, checking next retry times, no thawing
2819 -Mf freeze the messages
2820 -Mg give up on the messages
2821 -Mt thaw the messages
2822 -Mrm remove the messages
2823 In the above cases, this must be the last option. There are also the
2824 following options which are followed by a single message id, and which
2825 act on that message. Some of them use the "recipient" addresses as well.
2826 -Mar add recipient(s)
2827 -Mmad mark all recipients delivered
2828 -Mmd mark recipients(s) delivered
2830 -Mset load a message for use with -be
2832 -Mvc show copy (of whole message, in RFC 2822 format)
2837 else if (*argrest == 0)
2839 msg_action = MSG_DELIVER;
2840 forced_delivery = f.deliver_force_thaw = TRUE;
2842 else if (Ustrcmp(argrest, "ar") == 0)
2844 msg_action = MSG_ADD_RECIPIENT;
2845 one_msg_action = TRUE;
2847 else if (Ustrcmp(argrest, "c") == 0) msg_action = MSG_DELIVER;
2848 else if (Ustrcmp(argrest, "es") == 0)
2850 msg_action = MSG_EDIT_SENDER;
2851 one_msg_action = TRUE;
2853 else if (Ustrcmp(argrest, "f") == 0) msg_action = MSG_FREEZE;
2854 else if (Ustrcmp(argrest, "g") == 0)
2856 msg_action = MSG_DELIVER;
2857 deliver_give_up = TRUE;
2859 else if (Ustrcmp(argrest, "G") == 0)
2861 msg_action = MSG_SETQUEUE;
2862 queue_name_dest = argv[++i];
2864 else if (Ustrcmp(argrest, "mad") == 0)
2866 msg_action = MSG_MARK_ALL_DELIVERED;
2868 else if (Ustrcmp(argrest, "md") == 0)
2870 msg_action = MSG_MARK_DELIVERED;
2871 one_msg_action = TRUE;
2873 else if (Ustrcmp(argrest, "rm") == 0) msg_action = MSG_REMOVE;
2874 else if (Ustrcmp(argrest, "set") == 0)
2876 msg_action = MSG_LOAD;
2877 one_msg_action = TRUE;
2879 else if (Ustrcmp(argrest, "t") == 0) msg_action = MSG_THAW;
2880 else if (Ustrcmp(argrest, "vb") == 0)
2882 msg_action = MSG_SHOW_BODY;
2883 one_msg_action = TRUE;
2885 else if (Ustrcmp(argrest, "vc") == 0)
2887 msg_action = MSG_SHOW_COPY;
2888 one_msg_action = TRUE;
2890 else if (Ustrcmp(argrest, "vh") == 0)
2892 msg_action = MSG_SHOW_HEADER;
2893 one_msg_action = TRUE;
2895 else if (Ustrcmp(argrest, "vl") == 0)
2897 msg_action = MSG_SHOW_LOG;
2898 one_msg_action = TRUE;
2900 else { badarg = TRUE; break; }
2902 /* All the -Mxx options require at least one message id. */
2904 msg_action_arg = i + 1;
2905 if (msg_action_arg >= argc)
2906 exim_fail("exim: no message ids given after %s option\n", arg);
2908 /* Some require only message ids to follow */
2910 if (!one_msg_action)
2912 for (int j = msg_action_arg; j < argc; j++) if (!mac_ismsgid(argv[j]))
2913 exim_fail("exim: malformed message id %s after %s option\n",
2915 goto END_ARG; /* Remaining args are ids */
2918 /* Others require only one message id, possibly followed by addresses,
2919 which will be handled as normal arguments. */
2923 if (!mac_ismsgid(argv[msg_action_arg]))
2924 exim_fail("exim: malformed message id %s after %s option\n",
2925 argv[msg_action_arg], arg);
2931 /* Some programs seem to call the -om option without the leading o;
2932 for sendmail it askes for "me too". Exim always does this. */
2935 if (*argrest != 0) badarg = TRUE;
2939 /* -N: don't do delivery - a debugging option that stops transports doing
2940 their thing. It implies debugging at the D_v level. */
2945 f.dont_deliver = TRUE;
2946 debug_selector |= D_v;
2947 debug_file = stderr;
2953 /* -n: This means "don't alias" in sendmail, apparently.
2954 For normal invocations, it has no effect.
2955 It may affect some other options. */
2961 /* -O: Just ignore it. In sendmail, apparently -O option=value means set
2962 option to the specified value. This form uses long names. We need to handle
2963 -O option=value and -Ooption=value. */
2968 exim_fail("exim: string expected after -O\n");
2974 /* -oA: Set an argument for the bi command (sendmail's "alternate alias
2977 if (!*(alias_arg = argrest))
2978 if (i+1 < argc) alias_arg = argv[++i];
2979 else exim_fail("exim: string expected after -oA\n");
2982 /* -oB: Set a connection message max value for remote deliveries */
2985 uschar * p = argrest;
2987 if (i+1 < argc && isdigit((argv[i+1][0])))
2991 connection_max_messages = 1;
2998 exim_fail("exim: number expected after -oB\n");
2999 connection_max_messages = Uatoi(p);
3004 /* -odb: background delivery */
3007 if (Ustrcmp(argrest, "b") == 0)
3009 f.synchronous_delivery = FALSE;
3010 arg_queue_only = FALSE;
3011 queue_only_set = TRUE;
3014 /* -odd: testsuite-only: add no inter-process delays */
3016 else if (Ustrcmp(argrest, "d") == 0)
3017 f.testsuite_delays = FALSE;
3019 /* -odf: foreground delivery (smail-compatible option); same effect as
3020 -odi: interactive (synchronous) delivery (sendmail-compatible option)
3023 else if (Ustrcmp(argrest, "f") == 0 || Ustrcmp(argrest, "i") == 0)
3025 f.synchronous_delivery = TRUE;
3026 arg_queue_only = FALSE;
3027 queue_only_set = TRUE;
3030 /* -odq: queue only */
3032 else if (Ustrcmp(argrest, "q") == 0)
3034 f.synchronous_delivery = FALSE;
3035 arg_queue_only = TRUE;
3036 queue_only_set = TRUE;
3039 /* -odqs: queue SMTP only - do local deliveries and remote routing,
3040 but no remote delivery */
3042 else if (Ustrcmp(argrest, "qs") == 0)
3044 f.queue_smtp = TRUE;
3045 arg_queue_only = FALSE;
3046 queue_only_set = TRUE;
3051 /* -oex: Sendmail error flags. As these are also accepted without the
3052 leading -o prefix, for compatibility with vacation and other callers,
3053 they are handled with -e above. */
3055 /* -oi: Set flag so dot doesn't end non-SMTP input (same as -i)
3056 -oitrue: Another sendmail syntax for the same */
3059 if (!*argrest || Ustrcmp(argrest, "true") == 0)
3064 /* -oM*: Set various characteristics for an incoming message; actually
3065 acted on for trusted callers only. */
3070 exim_fail("exim: data expected after -oM%s\n", argrest);
3072 /* -oMa: Set sender host address */
3074 if (Ustrcmp(argrest, "a") == 0) sender_host_address = argv[++i];
3076 /* -oMaa: Set authenticator name */
3078 else if (Ustrcmp(argrest, "aa") == 0)
3079 sender_host_authenticated = argv[++i];
3081 /* -oMas: setting authenticated sender */
3083 else if (Ustrcmp(argrest, "as") == 0)
3084 authenticated_sender = string_copy_taint(argv[++i], TRUE);
3086 /* -oMai: setting authenticated id */
3088 else if (Ustrcmp(argrest, "ai") == 0)
3089 authenticated_id = string_copy_taint(argv[++i], TRUE);
3091 /* -oMi: Set incoming interface address */
3093 else if (Ustrcmp(argrest, "i") == 0) interface_address = argv[++i];
3095 /* -oMm: Message reference */
3097 else if (Ustrcmp(argrest, "m") == 0)
3099 if (!mac_ismsgid(argv[i+1]))
3100 exim_fail("-oMm must be a valid message ID\n");
3101 if (!f.trusted_config)
3102 exim_fail("-oMm must be called by a trusted user/config\n");
3103 message_reference = argv[++i];
3106 /* -oMr: Received protocol */
3108 else if (Ustrcmp(argrest, "r") == 0)
3110 if (received_protocol)
3111 exim_fail("received_protocol is set already\n");
3113 received_protocol = argv[++i];
3115 /* -oMs: Set sender host name */
3117 else if (Ustrcmp(argrest, "s") == 0)
3118 sender_host_name = string_copy_taint(argv[++i], TRUE);
3120 /* -oMt: Set sender ident */
3122 else if (Ustrcmp(argrest, "t") == 0)
3124 sender_ident_set = TRUE;
3125 sender_ident = argv[++i];
3128 /* Else a bad argument */
3135 /* -om: Me-too flag for aliases. Exim always does this. Some programs
3136 seem to call this as -m (undocumented), so that is also accepted (see
3138 /* -oo: An ancient flag for old-style addresses which still seems to
3139 crop up in some calls (see in SCO). */
3143 if (*argrest) badarg = TRUE;
3146 /* -oP <name>: set pid file path for daemon
3147 -oPX: delete pid file of daemon */
3150 if (!*argrest) override_pid_file_path = argv[++i];
3151 else if (Ustrcmp(argrest, "X") == 0) delete_pid_file();
3156 /* -or <n>: set timeout for non-SMTP acceptance
3157 -os <n>: set timeout for SMTP acceptance */
3162 int * tp = argrest[-1] == 'r'
3163 ? &arg_receive_timeout : &arg_smtp_receive_timeout;
3165 *tp = readconf_readtime(argrest, 0, FALSE);
3166 else if (i+1 < argc)
3167 *tp = readconf_readtime(argv[++i], 0, FALSE);
3170 exim_fail("exim: bad time value %s: abandoned\n", argv[i]);
3174 /* -oX <list>: Override local_interfaces and/or default daemon ports */
3177 if (*argrest) badarg = TRUE;
3178 else override_local_interfaces = argv[++i];
3181 /* Unknown -o argument */
3189 /* -ps: force Perl startup; -pd force delayed Perl startup */
3193 if (*argrest == 's' && argrest[1] == 0)
3195 perl_start_option = 1;
3198 if (*argrest == 'd' && argrest[1] == 0)
3200 perl_start_option = -1;
3205 /* -panythingelse is taken as the Sendmail-compatible argument -prval:sval,
3206 which sets the host protocol and host name */
3210 argrest = argv[++i];
3212 { badarg = TRUE; break; }
3218 if (received_protocol)
3219 exim_fail("received_protocol is set already\n");
3221 hn = Ustrchr(argrest, ':');
3223 received_protocol = argrest;
3226 int old_pool = store_pool;
3227 store_pool = POOL_PERM;
3228 received_protocol = string_copyn(argrest, hn - argrest);
3229 store_pool = old_pool;
3230 sender_host_name = hn + 1;
3237 receiving_message = FALSE;
3238 if (queue_interval >= 0)
3239 exim_fail("exim: -q specified more than once\n");
3241 /* -qq...: Do queue runs in a 2-stage manner */
3243 if (*argrest == 'q')
3245 f.queue_2stage = TRUE;
3249 /* -qi...: Do only first (initial) deliveries */
3251 if (*argrest == 'i')
3253 f.queue_run_first_delivery = TRUE;
3257 /* -qf...: Run the queue, forcing deliveries
3258 -qff..: Ditto, forcing thawing as well */
3260 if (*argrest == 'f')
3262 f.queue_run_force = TRUE;
3263 if (*++argrest == 'f')
3265 f.deliver_force_thaw = TRUE;
3270 /* -q[f][f]l...: Run the queue only on local deliveries */
3272 if (*argrest == 'l')
3274 f.queue_run_local = TRUE;
3278 /* -q[f][f][l][G<name>]... Work on the named queue */
3280 if (*argrest == 'G')
3283 for (argrest++, i = 0; argrest[i] && argrest[i] != '/'; ) i++;
3284 queue_name = string_copyn(argrest, i);
3286 if (*argrest == '/') argrest++;
3289 /* -q[f][f][l][G<name>]: Run the queue, optionally forced, optionally local
3290 only, optionally named, optionally starting from a given message id. */
3292 if (!(list_queue || count_queue))
3294 && (i + 1 >= argc || argv[i+1][0] == '-' || mac_ismsgid(argv[i+1])))
3297 if (i+1 < argc && mac_ismsgid(argv[i+1]))
3298 start_queue_run_id = argv[++i];
3299 if (i+1 < argc && mac_ismsgid(argv[i+1]))
3300 stop_queue_run_id = argv[++i];
3303 /* -q[f][f][l][G<name>/]<n>: Run the queue at regular intervals, optionally
3304 forced, optionally local only, optionally named. */
3306 else if ((queue_interval = readconf_readtime(*argrest ? argrest : argv[++i],
3308 exim_fail("exim: bad time value %s: abandoned\n", argv[i]);
3312 case 'R': /* Synonymous with -qR... */
3313 receiving_message = FALSE;
3315 /* -Rf: As -R (below) but force all deliveries,
3316 -Rff: Ditto, but also thaw all frozen messages,
3317 -Rr: String is regex
3318 -Rrf: Regex and force
3319 -Rrff: Regex and force and thaw
3321 in all cases provided there are no further characters in this
3325 for (int i = 0; i < nelem(rsopts); i++)
3326 if (Ustrcmp(argrest, rsopts[i]) == 0)
3328 if (i != 2) f.queue_run_force = TRUE;
3329 if (i >= 2) f.deliver_selectstring_regex = TRUE;
3330 if (i == 1 || i == 4) f.deliver_force_thaw = TRUE;
3331 argrest += Ustrlen(rsopts[i]);
3334 /* -R: Set string to match in addresses for forced queue run to
3335 pick out particular messages. */
3338 deliver_selectstring = argrest;
3339 else if (i+1 < argc)
3340 deliver_selectstring = argv[++i];
3342 exim_fail("exim: string expected after -R\n");
3346 /* -r: an obsolete synonym for -f (see above) */
3349 /* -S: Like -R but works on sender. */
3351 case 'S': /* Synonymous with -qS... */
3352 receiving_message = FALSE;
3354 /* -Sf: As -S (below) but force all deliveries,
3355 -Sff: Ditto, but also thaw all frozen messages,
3356 -Sr: String is regex
3357 -Srf: Regex and force
3358 -Srff: Regex and force and thaw
3360 in all cases provided there are no further characters in this
3364 for (int i = 0; i < nelem(rsopts); i++)
3365 if (Ustrcmp(argrest, rsopts[i]) == 0)
3367 if (i != 2) f.queue_run_force = TRUE;
3368 if (i >= 2) f.deliver_selectstring_sender_regex = TRUE;
3369 if (i == 1 || i == 4) f.deliver_force_thaw = TRUE;
3370 argrest += Ustrlen(rsopts[i]);
3373 /* -S: Set string to match in addresses for forced queue run to
3374 pick out particular messages. */
3377 deliver_selectstring_sender = argrest;
3378 else if (i+1 < argc)
3379 deliver_selectstring_sender = argv[++i];
3381 exim_fail("exim: string expected after -S\n");
3384 /* -Tqt is an option that is exclusively for use by the testing suite.
3385 It is not recognized in other circumstances. It allows for the setting up
3386 of explicit "queue times" so that various warning/retry things can be
3387 tested. Otherwise variability of clock ticks etc. cause problems. */
3390 if (f.running_in_test_harness && Ustrcmp(argrest, "qt") == 0)
3391 fudged_queue_times = argv[++i];
3396 /* -t: Set flag to extract recipients from body of message. */
3399 if (*argrest == 0) extract_recipients = TRUE;
3401 /* -ti: Set flag to extract recipients from body of message, and also
3402 specify that dot does not end the message. */
3404 else if (Ustrcmp(argrest, "i") == 0)
3406 extract_recipients = TRUE;
3410 /* -tls-on-connect: don't wait for STARTTLS (for old clients) */
3413 else if (Ustrcmp(argrest, "ls-on-connect") == 0) tls_in.on_connect = TRUE;
3420 /* -U: This means "initial user submission" in sendmail, apparently. The
3421 doc claims that in future sendmail may refuse syntactically invalid
3422 messages instead of fixing them. For the moment, we just ignore it. */
3428 /* -v: verify things - this is a very low-level debugging */
3433 debug_selector |= D_v;
3434 debug_file = stderr;
3440 /* -x: AIX uses this to indicate some fancy 8-bit character stuff:
3442 The -x flag tells the sendmail command that mail from a local
3443 mail program has National Language Support (NLS) extended characters
3444 in the body of the mail item. The sendmail command can send mail with
3445 extended NLS characters across networks that normally corrupts these
3448 As Exim is 8-bit clean, it just ignores this flag. */
3451 if (*argrest != 0) badarg = TRUE;
3454 /* -X: in sendmail: takes one parameter, logfile, and sends debugging
3455 logs to that file. We swallow the parameter and otherwise ignore it. */
3458 if (*argrest == '\0')
3460 exim_fail("exim: string expected after -X\n");
3464 if (*argrest == '\0')
3466 log_oneline = argv[i];
3468 exim_fail("exim: file name expected after %s\n", argv[i-1]);
3471 /* All other initial characters are errors */
3476 } /* End of high-level switch statement */
3478 /* Failed to recognize the option, or syntax error */
3481 exim_fail("exim abandoned: unknown, malformed, or incomplete "
3482 "option %s\n", arg);
3486 /* If -R or -S have been specified without -q, assume a single queue run. */
3488 if ( (deliver_selectstring || deliver_selectstring_sender)
3489 && queue_interval < 0)
3494 /* If usage_wanted is set we call the usage function - which never returns */
3495 if (usage_wanted) exim_usage(called_as);
3497 /* Arguments have been processed. Check for incompatibilities. */
3499 (smtp_input || extract_recipients || recipients_arg < argc) &&
3500 (f.daemon_listen || queue_interval >= 0 || bi_option ||
3501 test_retry_arg >= 0 || test_rewrite_arg >= 0 ||
3502 filter_test != FTEST_NONE || (msg_action_arg > 0 && !one_msg_action))
3505 msg_action_arg > 0 &&
3506 (f.daemon_listen || queue_interval > 0 || list_options ||
3507 (checking && msg_action != MSG_LOAD) ||
3508 bi_option || test_retry_arg >= 0 || test_rewrite_arg >= 0)
3511 (f.daemon_listen || queue_interval > 0) &&
3512 (sender_address != NULL || list_options || list_queue || checking ||
3516 f.daemon_listen && queue_interval == 0
3519 f.inetd_wait_mode && queue_interval >= 0
3523 (checking || smtp_input || extract_recipients ||
3524 filter_test != FTEST_NONE || bi_option)
3527 verify_address_mode &&
3528 (f.address_test_mode || smtp_input || extract_recipients ||
3529 filter_test != FTEST_NONE || bi_option)
3532 f.address_test_mode && (smtp_input || extract_recipients ||
3533 filter_test != FTEST_NONE || bi_option)
3536 smtp_input && (sender_address != NULL || filter_test != FTEST_NONE ||
3540 deliver_selectstring != NULL && queue_interval < 0
3543 msg_action == MSG_LOAD &&
3544 (!expansion_test || expansion_test_message != NULL)
3547 exim_fail("exim: incompatible command-line options or arguments\n");
3549 /* If debugging is set up, set the file and the file descriptor to pass on to
3550 child processes. It should, of course, be 2 for stderr. Also, force the daemon
3551 to run in the foreground. */
3553 if (debug_selector != 0)
3555 debug_file = stderr;
3556 debug_fd = fileno(debug_file);
3557 f.background_daemon = FALSE;
3558 testharness_pause_ms(100); /* lets caller finish */
3559 if (debug_selector != D_v) /* -v only doesn't show this */
3561 debug_printf("Exim version %s uid=%ld gid=%ld pid=%d D=%x\n",
3562 version_string, (long int)real_uid, (long int)real_gid, (int)getpid(),
3564 if (!version_printed)
3565 show_whats_supported(stderr);
3569 /* When started with root privilege, ensure that the limits on the number of
3570 open files and the number of processes (where that is accessible) are
3571 sufficiently large, or are unset, in case Exim has been called from an
3572 environment where the limits are screwed down. Not all OS have the ability to
3573 change some of these limits. */
3577 DEBUG(D_any) debug_print_ids(US"Exim has no root privilege:");
3583 #ifdef RLIMIT_NOFILE
3584 if (getrlimit(RLIMIT_NOFILE, &rlp) < 0)
3586 log_write(0, LOG_MAIN|LOG_PANIC, "getrlimit(RLIMIT_NOFILE) failed: %s",
3588 rlp.rlim_cur = rlp.rlim_max = 0;
3591 /* I originally chose 1000 as a nice big number that was unlikely to
3592 be exceeded. It turns out that some older OS have a fixed upper limit of
3595 if (rlp.rlim_cur < 1000)
3597 rlp.rlim_cur = rlp.rlim_max = 1000;
3598 if (setrlimit(RLIMIT_NOFILE, &rlp) < 0)
3600 rlp.rlim_cur = rlp.rlim_max = 256;
3601 if (setrlimit(RLIMIT_NOFILE, &rlp) < 0)
3602 log_write(0, LOG_MAIN|LOG_PANIC, "setrlimit(RLIMIT_NOFILE) failed: %s",
3609 if (getrlimit(RLIMIT_NPROC, &rlp) < 0)
3611 log_write(0, LOG_MAIN|LOG_PANIC, "getrlimit(RLIMIT_NPROC) failed: %s",
3613 rlp.rlim_cur = rlp.rlim_max = 0;
3616 #ifdef RLIM_INFINITY
3617 if (rlp.rlim_cur != RLIM_INFINITY && rlp.rlim_cur < 1000)
3619 rlp.rlim_cur = rlp.rlim_max = RLIM_INFINITY;
3621 if (rlp.rlim_cur < 1000)
3623 rlp.rlim_cur = rlp.rlim_max = 1000;
3625 if (setrlimit(RLIMIT_NPROC, &rlp) < 0)
3626 log_write(0, LOG_MAIN|LOG_PANIC, "setrlimit(RLIMIT_NPROC) failed: %s",
3632 /* Exim is normally entered as root (but some special configurations are
3633 possible that don't do this). However, it always spins off sub-processes that
3634 set their uid and gid as required for local delivery. We don't want to pass on
3635 any extra groups that root may belong to, so we want to get rid of them all at
3638 We need to obey setgroups() at this stage, before possibly giving up root
3639 privilege for a changed configuration file, but later on we might need to
3640 check on the additional groups for the admin user privilege - can't do that
3641 till after reading the config, which might specify the exim gid. Therefore,
3642 save the group list here first. */
3644 if ((group_count = getgroups(nelem(group_list), group_list)) < 0)
3645 exim_fail("exim: getgroups() failed: %s\n", strerror(errno));
3647 /* There is a fundamental difference in some BSD systems in the matter of
3648 groups. FreeBSD and BSDI are known to be different; NetBSD and OpenBSD are
3649 known not to be different. On the "different" systems there is a single group
3650 list, and the first entry in it is the current group. On all other versions of
3651 Unix there is a supplementary group list, which is in *addition* to the current
3652 group. Consequently, to get rid of all extraneous groups on a "standard" system
3653 you pass over 0 groups to setgroups(), while on a "different" system you pass
3654 over a single group - the current group, which is always the first group in the
3655 list. Calling setgroups() with zero groups on a "different" system results in
3656 an error return. The following code should cope with both types of system.
3658 Unfortunately, recent MacOS, which should be a FreeBSD, "helpfully" succeeds
3659 the "setgroups() with zero groups" - and changes the egid.
3660 Thanks to that we had to stash the original_egid above, for use below
3661 in the call to exim_setugid().
3663 However, if this process isn't running as root, setgroups() can't be used
3664 since you have to be root to run it, even if throwing away groups.
3665 Except, sigh, for Hurd - where you can.
3666 Not being root here happens only in some unusual configurations. */
3669 #ifndef OS_SETGROUPS_ZERO_DROPS_ALL
3670 && setgroups(0, NULL) != 0
3672 && setgroups(1, group_list) != 0)
3673 exim_fail("exim: setgroups() failed: %s\n", strerror(errno));
3675 /* If the configuration file name has been altered by an argument on the
3676 command line (either a new file name or a macro definition) and the caller is
3677 not root, or if this is a filter testing run, remove any setuid privilege the
3678 program has and run as the underlying user.
3680 The exim user is locked out of this, which severely restricts the use of -C
3683 Otherwise, set the real ids to the effective values (should be root unless run
3684 from inetd, which it can either be root or the exim uid, if one is configured).
3686 There is a private mechanism for bypassing some of this, in order to make it
3687 possible to test lots of configurations automatically, without having either to
3688 recompile each time, or to patch in an actual configuration file name and other
3689 values (such as the path name). If running in the test harness, pretend that
3690 configuration file changes and macro definitions haven't happened. */
3693 (!f.trusted_config || /* Config changed, or */
3694 !macros_trusted(opt_D_used)) && /* impermissible macros and */
3695 real_uid != root_uid && /* Not root, and */
3696 !f.running_in_test_harness /* Not fudged */
3698 expansion_test /* expansion testing */
3700 filter_test != FTEST_NONE) /* Filter testing */
3702 setgroups(group_count, group_list);
3703 exim_setugid(real_uid, real_gid, FALSE,
3704 US"-C, -D, -be or -bf forces real uid");
3705 removed_privilege = TRUE;
3707 /* In the normal case when Exim is called like this, stderr is available
3708 and should be used for any logging information because attempts to write
3709 to the log will usually fail. To arrange this, we unset really_exim. However,
3710 if no stderr is available there is no point - we might as well have a go
3711 at the log (if it fails, syslog will be written).
3713 Note that if the invoker is Exim, the logs remain available. Messing with
3714 this causes unlogged successful deliveries. */
3716 if (log_stderr && real_uid != exim_uid)
3717 f.really_exim = FALSE;
3720 /* Privilege is to be retained for the moment. It may be dropped later,
3721 depending on the job that this Exim process has been asked to do. For now, set
3722 the real uid to the effective so that subsequent re-execs of Exim are done by a
3726 exim_setugid(geteuid(), original_egid, FALSE, US"forcing real = effective");
3728 /* If testing a filter, open the file(s) now, before wasting time doing other
3729 setups and reading the message. */
3731 if (filter_test & FTEST_SYSTEM)
3732 if ((filter_sfd = Uopen(filter_test_sfile, O_RDONLY, 0)) < 0)
3733 exim_fail("exim: failed to open %s: %s\n", filter_test_sfile,
3736 if (filter_test & FTEST_USER)
3737 if ((filter_ufd = Uopen(filter_test_ufile, O_RDONLY, 0)) < 0)
3738 exim_fail("exim: failed to open %s: %s\n", filter_test_ufile,
3741 /* Initialise lookup_list
3742 If debugging, already called above via version reporting.
3743 In either case, we initialise the list of available lookups while running
3744 as root. All dynamically modules are loaded from a directory which is
3745 hard-coded into the binary and is code which, if not a module, would be
3746 part of Exim already. Ability to modify the content of the directory
3747 is equivalent to the ability to modify a setuid binary!
3749 This needs to happen before we read the main configuration. */
3753 if (f.running_in_test_harness) smtputf8_advertise_hosts = NULL;
3756 /* Read the main runtime configuration data; this gives up if there
3757 is a failure. It leaves the configuration file open so that the subsequent
3758 configuration data for delivery can be read if needed.
3760 NOTE: immediately after opening the configuration file we change the working
3761 directory to "/"! Later we change to $spool_directory. We do it there, because
3762 during readconf_main() some expansion takes place already. */
3764 /* Store the initial cwd before we change directories. Can be NULL if the
3765 dir has already been unlinked. */
3766 initial_cwd = os_getcwd(NULL, 0);
3769 -be[m] expansion test -
3770 -b[fF] filter test new
3772 -bmalware malware_test_file new
3774 -brw rewrite test new
3776 -bv[s] address verify -
3778 -bP <option> (except -bP config, which sets list_config)
3780 If any of these options is set, we suppress warnings about configuration
3781 issues (currently about tls_advertise_hosts and keep_environment not being
3785 #ifdef MEASURE_TIMING
3786 struct timeval t0, diff;
3787 (void)gettimeofday(&t0, NULL);
3790 readconf_main(checking || list_options);
3792 #ifdef MEASURE_TIMING
3793 report_time_since(&t0, US"readconf_main (delta)");
3798 /* Now in directory "/" */
3800 if (cleanup_environment() == FALSE)
3801 log_write(0, LOG_PANIC_DIE, "Can't cleanup environment");
3804 /* If an action on specific messages is requested, or if a daemon or queue
3805 runner is being started, we need to know if Exim was called by an admin user.
3806 This is the case if the real user is root or exim, or if the real group is
3807 exim, or if one of the supplementary groups is exim or a group listed in
3808 admin_groups. We don't fail all message actions immediately if not admin_user,
3809 since some actions can be performed by non-admin users. Instead, set admin_user
3810 for later interrogation. */
3812 if (real_uid == root_uid || real_uid == exim_uid || real_gid == exim_gid)
3813 f.admin_user = TRUE;
3815 for (int i = 0; i < group_count && !f.admin_user; i++)
3816 if (group_list[i] == exim_gid)
3817 f.admin_user = TRUE;
3818 else if (admin_groups)
3819 for (int j = 1; j <= (int)admin_groups[0] && !f.admin_user; j++)
3820 if (admin_groups[j] == group_list[i])
3821 f.admin_user = TRUE;
3823 /* Another group of privileged users are the trusted users. These are root,
3824 exim, and any caller matching trusted_users or trusted_groups. Trusted callers
3825 are permitted to specify sender_addresses with -f on the command line, and
3826 other message parameters as well. */
3828 if (real_uid == root_uid || real_uid == exim_uid)
3829 f.trusted_caller = TRUE;
3833 for (int i = 1; i <= (int)trusted_users[0] && !f.trusted_caller; i++)
3834 if (trusted_users[i] == real_uid)
3835 f.trusted_caller = TRUE;
3838 for (int i = 1; i <= (int)trusted_groups[0] && !f.trusted_caller; i++)
3839 if (trusted_groups[i] == real_gid)
3840 f.trusted_caller = TRUE;
3841 else for (int j = 0; j < group_count && !f.trusted_caller; j++)
3842 if (trusted_groups[i] == group_list[j])
3843 f.trusted_caller = TRUE;
3846 /* At this point, we know if the user is privileged and some command-line
3847 options become possibly impermissible, depending upon the configuration file. */
3849 if (checking && commandline_checks_require_admin && !f.admin_user)
3850 exim_fail("exim: those command-line flags are set to require admin\n");
3852 /* Handle the decoding of logging options. */
3854 decode_bits(log_selector, log_selector_size, log_notall,
3855 log_selector_string, log_options, log_options_count, US"log", 0);
3859 debug_printf("configuration file is %s\n", config_main_filename);
3860 debug_printf("log selectors =");
3861 for (int i = 0; i < log_selector_size; i++)
3862 debug_printf(" %08x", log_selector[i]);
3866 /* If domain literals are not allowed, check the sender address that was
3867 supplied with -f. Ditto for a stripped trailing dot. */
3871 if (sender_address[sender_address_domain] == '[' && !allow_domain_literals)
3872 exim_fail("exim: bad -f address \"%s\": domain literals not "
3873 "allowed\n", sender_address);
3874 if (f_end_dot && !strip_trailing_dot)
3875 exim_fail("exim: bad -f address \"%s.\": domain is malformed "
3876 "(trailing dot not allowed)\n", sender_address);
3879 /* See if an admin user overrode our logging. */
3881 if (cmdline_syslog_name)
3884 syslog_processname = cmdline_syslog_name;
3885 log_file_path = string_copy(CUS"syslog");
3888 /* not a panic, non-privileged users should not be able to spam paniclog */
3890 "exim: you lack sufficient privilege to specify syslog process name\n");
3892 /* Paranoia check of maximum lengths of certain strings. There is a check
3893 on the length of the log file path in log.c, which will come into effect
3894 if there are any calls to write the log earlier than this. However, if we
3895 get this far but the string is very long, it is better to stop now than to
3896 carry on and (e.g.) receive a message and then have to collapse. The call to
3897 log_write() from here will cause the ultimate panic collapse if the complete
3898 file name exceeds the buffer length. */
3900 if (Ustrlen(log_file_path) > 200)
3901 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3902 "log_file_path is longer than 200 chars: aborting");
3904 if (Ustrlen(pid_file_path) > 200)
3905 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3906 "pid_file_path is longer than 200 chars: aborting");
3908 if (Ustrlen(spool_directory) > 200)
3909 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3910 "spool_directory is longer than 200 chars: aborting");
3912 /* Length check on the process name given to syslog for its TAG field,
3913 which is only permitted to be 32 characters or less. See RFC 3164. */
3915 if (Ustrlen(syslog_processname) > 32)
3916 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3917 "syslog_processname is longer than 32 chars: aborting");
3922 log_write(0, LOG_MAIN, "%s", log_oneline);
3923 return EXIT_SUCCESS;
3926 return EXIT_FAILURE;
3928 /* In some operating systems, the environment variable TMPDIR controls where
3929 temporary files are created; Exim doesn't use these (apart from when delivering
3930 to MBX mailboxes), but called libraries such as DBM libraries may require them.
3931 If TMPDIR is found in the environment, reset it to the value defined in the
3932 EXIM_TMPDIR macro, if this macro is defined. For backward compatibility this
3933 macro may be called TMPDIR in old "Local/Makefile"s. It's converted to
3934 EXIM_TMPDIR by the build scripts.
3938 if (environ) for (uschar ** p = USS environ; *p; p++)
3939 if (Ustrncmp(*p, "TMPDIR=", 7) == 0 && Ustrcmp(*p+7, EXIM_TMPDIR) != 0)
3941 uschar * newp = store_malloc(Ustrlen(EXIM_TMPDIR) + 8);
3942 sprintf(CS newp, "TMPDIR=%s", EXIM_TMPDIR);
3944 DEBUG(D_any) debug_printf("reset TMPDIR=%s in environment\n", EXIM_TMPDIR);
3948 /* Timezone handling. If timezone_string is "utc", set a flag to cause all
3949 timestamps to be in UTC (gmtime() is used instead of localtime()). Otherwise,
3950 we may need to get rid of a bogus timezone setting. This can arise when Exim is
3951 called by a user who has set the TZ variable. This then affects the timestamps
3952 in log files and in Received: headers, and any created Date: header lines. The
3953 required timezone is settable in the configuration file, so nothing can be done
3954 about this earlier - but hopefully nothing will normally be logged earlier than
3955 this. We have to make a new environment if TZ is wrong, but don't bother if
3956 timestamps_utc is set, because then all times are in UTC anyway. */
3958 if (timezone_string && strcmpic(timezone_string, US"UTC") == 0)
3959 f.timestamps_utc = TRUE;
3962 uschar *envtz = US getenv("TZ");
3964 ? !timezone_string || Ustrcmp(timezone_string, envtz) != 0
3965 : timezone_string != NULL
3968 uschar **p = USS environ;
3972 if (environ) while (*p++) count++;
3973 if (!envtz) count++;
3974 newp = new = store_malloc(sizeof(uschar *) * (count + 1));
3975 if (environ) for (p = USS environ; *p; p++)
3976 if (Ustrncmp(*p, "TZ=", 3) != 0) *newp++ = *p;
3977 if (timezone_string)
3979 *newp = store_malloc(Ustrlen(timezone_string) + 4);
3980 sprintf(CS *newp++, "TZ=%s", timezone_string);
3985 DEBUG(D_any) debug_printf("Reset TZ to %s: time is %s\n", timezone_string,
3986 tod_stamp(tod_log));
3990 /* Handle the case when we have removed the setuid privilege because of -C or
3991 -D. This means that the caller of Exim was not root.
3993 There is a problem if we were running as the Exim user. The sysadmin may
3994 expect this case to retain privilege because "the binary was called by the
3995 Exim user", but it hasn't, because either the -D option set macros, or the
3996 -C option set a non-trusted configuration file. There are two possibilities:
3998 (1) If deliver_drop_privilege is set, Exim is not going to re-exec in order
3999 to do message deliveries. Thus, the fact that it is running as a
4000 non-privileged user is plausible, and might be wanted in some special
4001 configurations. However, really_exim will have been set false when
4002 privilege was dropped, to stop Exim trying to write to its normal log
4003 files. Therefore, re-enable normal log processing, assuming the sysadmin
4004 has set up the log directory correctly.
4006 (2) If deliver_drop_privilege is not set, the configuration won't work as
4007 apparently intended, and so we log a panic message. In order to retain
4008 root for -C or -D, the caller must either be root or be invoking a
4009 trusted configuration file (when deliver_drop_privilege is false). */
4011 if ( removed_privilege
4012 && (!f.trusted_config || opt_D_used)
4013 && real_uid == exim_uid)
4014 if (deliver_drop_privilege)
4015 f.really_exim = TRUE; /* let logging work normally */
4017 log_write(0, LOG_MAIN|LOG_PANIC,
4018 "exim user lost privilege for using %s option",
4019 f.trusted_config? "-D" : "-C");
4021 /* Start up Perl interpreter if Perl support is configured and there is a
4022 perl_startup option, and the configuration or the command line specifies
4023 initializing starting. Note that the global variables are actually called
4024 opt_perl_xxx to avoid clashing with perl's namespace (perl_*). */
4027 if (perl_start_option != 0)
4028 opt_perl_at_start = (perl_start_option > 0);
4029 if (opt_perl_at_start && opt_perl_startup != NULL)
4032 DEBUG(D_any) debug_printf("Starting Perl interpreter\n");
4033 if ((errstr = init_perl(opt_perl_startup)))
4034 exim_fail("exim: error in perl_startup code: %s\n", errstr);
4035 opt_perl_started = TRUE;
4037 #endif /* EXIM_PERL */
4039 /* Log the arguments of the call if the configuration file said so. This is
4040 a debugging feature for finding out what arguments certain MUAs actually use.
4041 Don't attempt it if logging is disabled, or if listing variables or if
4042 verifying/testing addresses or expansions. */
4044 if ( (debug_selector & D_any || LOGGING(arguments))
4045 && f.really_exim && !list_options && !checking)
4047 uschar *p = big_buffer;
4048 Ustrcpy(p, US"cwd= (failed)");
4054 Ustrncpy(p + 4, initial_cwd, big_buffer_size-5);
4055 p += 4 + Ustrlen(initial_cwd);
4056 /* in case p is near the end and we don't provide enough space for
4057 * string_format to be willing to write. */
4061 (void)string_format(p, big_buffer_size - (p - big_buffer), " %d args:", argc);
4063 for (int i = 0; i < argc; i++)
4065 int len = Ustrlen(argv[i]);
4066 const uschar *printing;
4068 if (p + len + 8 >= big_buffer + big_buffer_size)
4070 Ustrcpy(p, US" ...");
4071 log_write(0, LOG_MAIN, "%s", big_buffer);
4072 Ustrcpy(big_buffer, US"...");
4075 printing = string_printing(argv[i]);
4076 if (printing[0] == 0) quote = US"\""; else
4078 const uschar *pp = printing;
4080 while (*pp != 0) if (isspace(*pp++)) { quote = US"\""; break; }
4082 p += sprintf(CS p, " %s%.*s%s", quote, (int)(big_buffer_size -
4083 (p - big_buffer) - 4), printing, quote);
4086 if (LOGGING(arguments))
4087 log_write(0, LOG_MAIN, "%s", big_buffer);
4089 debug_printf("%s\n", big_buffer);
4092 /* Set the working directory to be the top-level spool directory. We don't rely
4093 on this in the code, which always uses fully qualified names, but it's useful
4094 for core dumps etc. Don't complain if it fails - the spool directory might not
4095 be generally accessible and calls with the -C option (and others) have lost
4096 privilege by now. Before the chdir, we try to ensure that the directory exists.
4099 if (Uchdir(spool_directory) != 0)
4102 (void)directory_make(spool_directory, US"", SPOOL_DIRECTORY_MODE, FALSE);
4103 dummy = /* quieten compiler */ Uchdir(spool_directory);
4104 dummy = dummy; /* yet more compiler quietening, sigh */
4107 /* Handle calls with the -bi option. This is a sendmail option to rebuild *the*
4108 alias file. Exim doesn't have such a concept, but this call is screwed into
4109 Sun's YP makefiles. Handle this by calling a configured script, as the real
4110 user who called Exim. The -oA option can be used to pass an argument to the
4115 (void)fclose(config_file);
4116 if (bi_command != NULL)
4120 argv[i++] = bi_command;
4121 if (alias_arg != NULL) argv[i++] = alias_arg;
4124 setgroups(group_count, group_list);
4125 exim_setugid(real_uid, real_gid, FALSE, US"running bi_command");
4127 DEBUG(D_exec) debug_printf("exec %.256s %.256s\n", argv[0],
4128 (argv[1] == NULL)? US"" : argv[1]);
4130 execv(CS argv[0], (char *const *)argv);
4131 exim_fail("exim: exec failed: %s\n", strerror(errno));
4135 DEBUG(D_any) debug_printf("-bi used but bi_command not set; exiting\n");
4140 /* We moved the admin/trusted check to be immediately after reading the
4141 configuration file. We leave these prints here to ensure that syslog setup,
4142 logfile setup, and so on has already happened. */
4144 if (f.trusted_caller) DEBUG(D_any) debug_printf("trusted user\n");
4145 if (f.admin_user) DEBUG(D_any) debug_printf("admin user\n");
4147 /* Only an admin user may start the daemon or force a queue run in the default
4148 configuration, but the queue run restriction can be relaxed. Only an admin
4149 user may request that a message be returned to its sender forthwith. Only an
4150 admin user may specify a debug level greater than D_v (because it might show
4151 passwords, etc. in lookup queries). Only an admin user may request a queue
4152 count. Only an admin user can use the test interface to scan for email
4153 (because Exim will be in the spool dir and able to look at mails). */
4157 BOOL debugset = (debug_selector & ~D_v) != 0;
4158 if ( deliver_give_up || f.daemon_listen || malware_test_file
4159 || count_queue && queue_list_requires_admin
4160 || list_queue && queue_list_requires_admin
4161 || queue_interval >= 0 && prod_requires_admin
4162 || queue_name_dest && prod_requires_admin
4163 || debugset && !f.running_in_test_harness
4165 exim_fail("exim:%s permission denied\n", debugset? " debugging" : "");
4168 /* If the real user is not root or the exim uid, the argument for passing
4169 in an open TCP/IP connection for another message is not permitted, nor is
4170 running with the -N option for any delivery action, unless this call to exim is
4171 one that supplied an input message, or we are using a patched exim for
4172 regression testing. */
4174 if (real_uid != root_uid && real_uid != exim_uid &&
4175 (continue_hostname != NULL ||
4177 (queue_interval >= 0 || f.daemon_listen || msg_action_arg > 0)
4178 )) && !f.running_in_test_harness)
4179 exim_fail("exim: Permission denied\n");
4181 /* If the caller is not trusted, certain arguments are ignored when running for
4182 real, but are permitted when checking things (-be, -bv, -bt, -bh, -bf, -bF).
4183 Note that authority for performing certain actions on messages is tested in the
4184 queue_action() function. */
4186 if (!f.trusted_caller && !checking)
4188 sender_host_name = sender_host_address = interface_address =
4189 sender_ident = received_protocol = NULL;
4190 sender_host_port = interface_port = 0;
4191 sender_host_authenticated = authenticated_sender = authenticated_id = NULL;
4194 /* If a sender host address is set, extract the optional port number off the
4195 end of it and check its syntax. Do the same thing for the interface address.
4196 Exim exits if the syntax is bad. */
4200 if (sender_host_address != NULL)
4201 sender_host_port = check_port(sender_host_address);
4202 if (interface_address != NULL)
4203 interface_port = check_port(interface_address);
4206 /* If the caller is trusted, then they can use -G to suppress_local_fixups. */
4209 if (f.trusted_caller)
4211 f.suppress_local_fixups = f.suppress_local_fixups_default = TRUE;
4212 DEBUG(D_acl) debug_printf("suppress_local_fixups forced on by -G\n");
4215 exim_fail("exim: permission denied (-G requires a trusted user)\n");
4218 /* If an SMTP message is being received check to see if the standard input is a
4219 TCP/IP socket. If it is, we assume that Exim was called from inetd if the
4220 caller is root or the Exim user, or if the port is a privileged one. Otherwise,
4225 union sockaddr_46 inetd_sock;
4226 EXIM_SOCKLEN_T size = sizeof(inetd_sock);
4227 if (getpeername(0, (struct sockaddr *)(&inetd_sock), &size) == 0)
4229 int family = ((struct sockaddr *)(&inetd_sock))->sa_family;
4230 if (family == AF_INET || family == AF_INET6)
4232 union sockaddr_46 interface_sock;
4233 size = sizeof(interface_sock);
4235 if (getsockname(0, (struct sockaddr *)(&interface_sock), &size) == 0)
4236 interface_address = host_ntoa(-1, &interface_sock, NULL,
4239 if (host_is_tls_on_connect_port(interface_port)) tls_in.on_connect = TRUE;
4241 if (real_uid == root_uid || real_uid == exim_uid || interface_port < 1024)
4244 sender_host_address = host_ntoa(-1, (struct sockaddr *)(&inetd_sock),
4245 NULL, &sender_host_port);
4246 if (mua_wrapper) log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Input from "
4247 "inetd is not supported when mua_wrapper is set");
4251 "exim: Permission denied (unprivileged user, unprivileged port)\n");
4256 /* If the load average is going to be needed while receiving a message, get it
4257 now for those OS that require the first call to os_getloadavg() to be done as
4258 root. There will be further calls later for each message received. */
4260 #ifdef LOAD_AVG_NEEDS_ROOT
4261 if ( receiving_message
4262 && (queue_only_load >= 0 || (f.is_inetd && smtp_load_reserve >= 0)))
4263 load_average = OS_GETLOADAVG();
4266 /* The queue_only configuration option can be overridden by -odx on the command
4267 line, except that if queue_only_override is false, queue_only cannot be unset
4268 from the command line. */
4270 if (queue_only_set && (queue_only_override || arg_queue_only))
4271 queue_only = arg_queue_only;
4273 /* The receive_timeout and smtp_receive_timeout options can be overridden by
4276 if (arg_receive_timeout >= 0) receive_timeout = arg_receive_timeout;
4277 if (arg_smtp_receive_timeout >= 0)
4278 smtp_receive_timeout = arg_smtp_receive_timeout;
4280 /* If Exim was started with root privilege, unless we have already removed the
4281 root privilege above as a result of -C, -D, -be, -bf or -bF, remove it now
4282 except when starting the daemon or doing some kind of delivery or address
4283 testing (-bt). These are the only cases when root need to be retained. We run
4284 as exim for -bv and -bh. However, if deliver_drop_privilege is set, root is
4285 retained only for starting the daemon. We always do the initgroups() in this
4286 situation (controlled by the TRUE below), in order to be as close as possible
4287 to the state Exim usually runs in. */
4289 if (!unprivileged && /* originally had root AND */
4290 !removed_privilege && /* still got root AND */
4291 !f.daemon_listen && /* not starting the daemon */
4292 queue_interval <= 0 && /* (either kind of daemon) */
4294 deliver_drop_privilege || /* requested unprivileged */
4296 queue_interval < 0 && /* not running the queue */
4297 (msg_action_arg < 0 || /* and */
4298 msg_action != MSG_DELIVER) && /* not delivering and */
4299 (!checking || !f.address_test_mode) /* not address checking */
4301 exim_setugid(exim_uid, exim_gid, TRUE, US"privilege not needed");
4303 /* When we are retaining a privileged uid, we still change to the exim gid. */
4308 DEBUG(D_any) debug_printf("dropping to exim gid; retaining priv uid\n");
4309 rv = setgid(exim_gid);
4310 /* Impact of failure is that some stuff might end up with an incorrect group.
4311 We track this for failures from root, since any attempt to change privilege
4312 by root should succeed and failures should be examined. For non-root,
4313 there's no security risk. For me, it's { exim -bV } on a just-built binary,
4314 no need to complain then. */
4316 if (!(unprivileged || removed_privilege))
4317 exim_fail("exim: changing group failed: %s\n", strerror(errno));
4319 DEBUG(D_any) debug_printf("changing group to %ld failed: %s\n",
4320 (long int)exim_gid, strerror(errno));
4323 /* Handle a request to scan a file for malware */
4324 if (malware_test_file)
4326 #ifdef WITH_CONTENT_SCAN
4328 set_process_info("scanning file for malware");
4329 result = malware_in_file(malware_test_file);
4332 printf("No malware found.\n");
4337 printf("Malware lookup returned non-okay/fail: %d\n", result);
4341 printf("Malware found: %s\n", malware_name);
4343 printf("Malware scan detected malware of unknown name.\n");
4345 printf("Malware scanning not enabled at compile time.\n");
4350 /* Handle a request to list the delivery queue */
4354 set_process_info("listing the queue");
4355 queue_list(list_queue_option, argv + recipients_arg, argc - recipients_arg);
4359 /* Handle a request to count the delivery queue */
4363 set_process_info("counting the queue");
4364 fprintf(stdout, "%u\n", queue_count());
4368 /* Handle actions on specific messages, except for the force delivery and
4369 message load actions, which are done below. Some actions take a whole list of
4370 message ids, which are known to continue up to the end of the arguments. Others
4371 take a single message id and then operate on the recipients list. */
4373 if (msg_action_arg > 0 && msg_action != MSG_DELIVER && msg_action != MSG_LOAD)
4375 int yield = EXIT_SUCCESS;
4376 set_process_info("acting on specified messages");
4378 /* ACL definitions may be needed when removing a message (-Mrm) because
4379 event_action gets expanded */
4381 if (msg_action == MSG_REMOVE)
4384 if (!one_msg_action)
4386 for (i = msg_action_arg; i < argc; i++)
4387 if (!queue_action(argv[i], msg_action, NULL, 0, 0))
4388 yield = EXIT_FAILURE;
4391 case MSG_REMOVE: case MSG_FREEZE: case MSG_THAW: break;
4392 default: printf("\n"); break;
4396 else if (!queue_action(argv[msg_action_arg], msg_action, argv, argc,
4397 recipients_arg)) yield = EXIT_FAILURE;
4401 /* We used to set up here to skip reading the ACL section, on
4402 (msg_action_arg > 0 || (queue_interval == 0 && !f.daemon_listen)
4403 Now, since the intro of the ${acl } expansion, ACL definitions may be
4404 needed in transports so we lost the optimisation. */
4407 #ifdef MEASURE_TIMING
4408 struct timeval t0, diff;
4409 (void)gettimeofday(&t0, NULL);
4414 #ifdef MEASURE_TIMING
4415 report_time_since(&t0, US"readconf_rest (delta)");
4419 /* Handle the -brt option. This is for checking out retry configurations.
4420 The next three arguments are a domain name or a complete address, and
4421 optionally two error numbers. All it does is to call the function that
4422 scans the retry configuration data. */
4424 if (test_retry_arg >= 0)
4426 retry_config *yield;
4427 int basic_errno = 0;
4431 if (test_retry_arg >= argc)
4433 printf("-brt needs a domain or address argument\n");
4434 exim_exit(EXIT_FAILURE, US"main");
4436 s1 = argv[test_retry_arg++];
4439 /* If the first argument contains no @ and no . it might be a local user
4440 or it might be a single-component name. Treat as a domain. */
4442 if (Ustrchr(s1, '@') == NULL && Ustrchr(s1, '.') == NULL)
4444 printf("Warning: \"%s\" contains no '@' and no '.' characters. It is "
4445 "being \ntreated as a one-component domain, not as a local part.\n\n",
4449 /* There may be an optional second domain arg. */
4451 if (test_retry_arg < argc && Ustrchr(argv[test_retry_arg], '.') != NULL)
4452 s2 = argv[test_retry_arg++];
4454 /* The final arg is an error name */
4456 if (test_retry_arg < argc)
4458 uschar *ss = argv[test_retry_arg];
4460 readconf_retry_error(ss, ss + Ustrlen(ss), &basic_errno, &more_errno);
4463 printf("%s\n", CS error);
4464 return EXIT_FAILURE;
4467 /* For the {MAIL,RCPT,DATA}_4xx errors, a value of 255 means "any", and a
4468 code > 100 as an error is for matching codes to the decade. Turn them into
4469 a real error code, off the decade. */
4471 if (basic_errno == ERRNO_MAIL4XX ||
4472 basic_errno == ERRNO_RCPT4XX ||
4473 basic_errno == ERRNO_DATA4XX)
4475 int code = (more_errno >> 8) & 255;
4477 more_errno = (more_errno & 0xffff00ff) | (21 << 8);
4478 else if (code > 100)
4479 more_errno = (more_errno & 0xffff00ff) | ((code - 96) << 8);
4483 if (!(yield = retry_find_config(s1, s2, basic_errno, more_errno)))
4484 printf("No retry information found\n");
4487 more_errno = yield->more_errno;
4488 printf("Retry rule: %s ", yield->pattern);
4490 if (yield->basic_errno == ERRNO_EXIMQUOTA)
4492 printf("quota%s%s ",
4493 (more_errno > 0)? "_" : "",
4494 (more_errno > 0)? readconf_printtime(more_errno) : US"");
4496 else if (yield->basic_errno == ECONNREFUSED)
4498 printf("refused%s%s ",
4499 (more_errno > 0)? "_" : "",
4500 (more_errno == 'M')? "MX" :
4501 (more_errno == 'A')? "A" : "");
4503 else if (yield->basic_errno == ETIMEDOUT)
4506 if ((more_errno & RTEF_CTOUT) != 0) printf("_connect");
4508 if (more_errno != 0) printf("_%s",
4509 (more_errno == 'M')? "MX" : "A");
4512 else if (yield->basic_errno == ERRNO_AUTHFAIL)
4513 printf("auth_failed ");
4516 for (retry_rule * r = yield->rules; r; r = r->next)
4518 printf("%c,%s", r->rule, readconf_printtime(r->timeout)); /* Do not */
4519 printf(",%s", readconf_printtime(r->p1)); /* amalgamate */
4525 printf(",%d.", x/1000);
4539 exim_exit(EXIT_SUCCESS, US"main");
4542 /* Handle a request to list one or more configuration options */
4543 /* If -n was set, we suppress some information */
4548 set_process_info("listing variables");
4549 if (recipients_arg >= argc)
4550 fail = !readconf_print(US"all", NULL, flag_n);
4551 else for (i = recipients_arg; i < argc; i++)
4554 (Ustrcmp(argv[i], "router") == 0 ||
4555 Ustrcmp(argv[i], "transport") == 0 ||
4556 Ustrcmp(argv[i], "authenticator") == 0 ||
4557 Ustrcmp(argv[i], "macro") == 0 ||
4558 Ustrcmp(argv[i], "environment") == 0))
4560 fail |= !readconf_print(argv[i+1], argv[i], flag_n);
4564 fail = !readconf_print(argv[i], NULL, flag_n);
4566 exim_exit(fail ? EXIT_FAILURE : EXIT_SUCCESS, US"main");
4571 set_process_info("listing config");
4572 exim_exit(readconf_print(US"config", NULL, flag_n)
4573 ? EXIT_SUCCESS : EXIT_FAILURE, US"main");
4577 /* Initialise subsystems as required. */
4581 /* Handle a request to deliver one or more messages that are already on the
4582 queue. Values of msg_action other than MSG_DELIVER and MSG_LOAD are dealt with
4583 above. MSG_LOAD is handled with -be (which is the only time it applies) below.
4585 Delivery of specific messages is typically used for a small number when
4586 prodding by hand (when the option forced_delivery will be set) or when
4587 re-execing to regain root privilege. Each message delivery must happen in a
4588 separate process, so we fork a process for each one, and run them sequentially
4589 so that debugging output doesn't get intertwined, and to avoid spawning too
4590 many processes if a long list is given. However, don't fork for the last one;
4591 this saves a process in the common case when Exim is called to deliver just one
4594 if (msg_action_arg > 0 && msg_action != MSG_LOAD)
4596 if (prod_requires_admin && !f.admin_user)
4598 fprintf(stderr, "exim: Permission denied\n");
4599 exim_exit(EXIT_FAILURE, US"main");
4601 set_process_info("delivering specified messages");
4602 if (deliver_give_up) forced_delivery = f.deliver_force_thaw = TRUE;
4603 for (i = msg_action_arg; i < argc; i++)
4608 (void)deliver_message(argv[i], forced_delivery, deliver_give_up);
4609 else if ((pid = exim_fork(US"cmdline-delivery")) == 0)
4611 (void)deliver_message(argv[i], forced_delivery, deliver_give_up);
4612 exim_underbar_exit(EXIT_SUCCESS, US"cmdline-delivery");
4616 fprintf(stderr, "failed to fork delivery process for %s: %s\n", argv[i],
4618 exim_exit(EXIT_FAILURE, US"main");
4622 exim_exit(EXIT_SUCCESS, US"main");
4626 /* If only a single queue run is requested, without SMTP listening, we can just
4627 turn into a queue runner, with an optional starting message id. */
4629 if (queue_interval == 0 && !f.daemon_listen)
4631 DEBUG(D_queue_run) debug_printf("Single queue run%s%s%s%s\n",
4632 start_queue_run_id ? US" starting at " : US"",
4633 start_queue_run_id ? start_queue_run_id: US"",
4634 stop_queue_run_id ? US" stopping at " : US"",
4635 stop_queue_run_id ? stop_queue_run_id : US"");
4637 set_process_info("running the '%s' queue (single queue run)", queue_name);
4639 set_process_info("running the queue (single queue run)");
4640 queue_run(start_queue_run_id, stop_queue_run_id, FALSE);
4641 exim_exit(EXIT_SUCCESS, US"main");
4645 /* Find the login name of the real user running this process. This is always
4646 needed when receiving a message, because it is written into the spool file. It
4647 may also be used to construct a from: or a sender: header, and in this case we
4648 need the user's full name as well, so save a copy of it, checked for RFC822
4649 syntax and munged if necessary, if it hasn't previously been set by the -F
4650 argument. We may try to get the passwd entry more than once, in case NIS or
4651 other delays are in evidence. Save the home directory for use in filter testing
4656 if ((pw = getpwuid(real_uid)) != NULL)
4658 originator_login = string_copy(US pw->pw_name);
4659 originator_home = string_copy(US pw->pw_dir);
4661 /* If user name has not been set by -F, set it from the passwd entry
4662 unless -f has been used to set the sender address by a trusted user. */
4664 if (!originator_name)
4666 if (!sender_address || (!f.trusted_caller && filter_test == FTEST_NONE))
4668 uschar *name = US pw->pw_gecos;
4669 uschar *amp = Ustrchr(name, '&');
4672 /* Most Unix specify that a '&' character in the gecos field is
4673 replaced by a copy of the login name, and some even specify that
4674 the first character should be upper cased, so that's what we do. */
4679 string_format(buffer, sizeof(buffer), "%.*s%n%s%s",
4680 (int)(amp - name), name, &loffset, originator_login, amp + 1);
4681 buffer[loffset] = toupper(buffer[loffset]);
4685 /* If a pattern for matching the gecos field was supplied, apply
4686 it and then expand the name string. */
4688 if (gecos_pattern && gecos_name)
4691 re = regex_must_compile(gecos_pattern, FALSE, TRUE); /* Use malloc */
4693 if (regex_match_and_setup(re, name, 0, -1))
4695 uschar *new_name = expand_string(gecos_name);
4699 DEBUG(D_receive) debug_printf("user name \"%s\" extracted from "
4700 "gecos field \"%s\"\n", new_name, name);
4703 else DEBUG(D_receive) debug_printf("failed to expand gecos_name string "
4704 "\"%s\": %s\n", gecos_name, expand_string_message);
4706 else DEBUG(D_receive) debug_printf("gecos_pattern \"%s\" did not match "
4707 "gecos field \"%s\"\n", gecos_pattern, name);
4708 store_free((void *)re);
4710 originator_name = string_copy(name);
4713 /* A trusted caller has used -f but not -F */
4715 else originator_name = US"";
4718 /* Break the retry loop */
4723 if (++i > finduser_retries) break;
4727 /* If we cannot get a user login, log the incident and give up, unless the
4728 configuration specifies something to use. When running in the test harness,
4729 any setting of unknown_login overrides the actual name. */
4731 if (originator_login == NULL || f.running_in_test_harness)
4733 if (unknown_login != NULL)
4735 originator_login = expand_string(unknown_login);
4736 if (originator_name == NULL && unknown_username != NULL)
4737 originator_name = expand_string(unknown_username);
4738 if (originator_name == NULL) originator_name = US"";
4740 if (originator_login == NULL)
4741 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Failed to get user name for uid %d",
4745 /* Ensure that the user name is in a suitable form for use as a "phrase" in an
4748 originator_name = string_copy(parse_fix_phrase(originator_name,
4749 Ustrlen(originator_name), big_buffer, big_buffer_size));
4751 /* If a message is created by this call of Exim, the uid/gid of its originator
4752 are those of the caller. These values are overridden if an existing message is
4753 read in from the spool. */
4755 originator_uid = real_uid;
4756 originator_gid = real_gid;
4758 DEBUG(D_receive) debug_printf("originator: uid=%d gid=%d login=%s name=%s\n",
4759 (int)originator_uid, (int)originator_gid, originator_login, originator_name);
4761 /* Run in daemon and/or queue-running mode. The function daemon_go() never
4762 returns. We leave this till here so that the originator_ fields are available
4763 for incoming messages via the daemon. The daemon cannot be run in mua_wrapper
4766 if (f.daemon_listen || f.inetd_wait_mode || queue_interval > 0)
4770 fprintf(stderr, "Daemon cannot be run when mua_wrapper is set\n");
4771 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Daemon cannot be run when "
4772 "mua_wrapper is set");
4775 # ifndef DISABLE_TLS
4776 /* This also checks that the library linkage is working and we can call
4777 routines in it, so call even if tls_require_ciphers is unset */
4779 # ifdef MEASURE_TIMING
4780 struct timeval t0, diff;
4781 (void)gettimeofday(&t0, NULL);
4783 if (!tls_dropprivs_validate_require_cipher(FALSE))
4785 # ifdef MEASURE_TIMING
4786 report_time_since(&t0, US"validate_ciphers (delta)");
4794 /* If the sender ident has not been set (by a trusted caller) set it to
4795 the caller. This will get overwritten below for an inetd call. If a trusted
4796 caller has set it empty, unset it. */
4798 if (!sender_ident) sender_ident = originator_login;
4799 else if (!*sender_ident) sender_ident = NULL;
4801 /* Handle the -brw option, which is for checking out rewriting rules. Cause log
4802 writes (on errors) to go to stderr instead. Can't do this earlier, as want the
4803 originator_* variables set. */
4805 if (test_rewrite_arg >= 0)
4807 f.really_exim = FALSE;
4808 if (test_rewrite_arg >= argc)
4810 printf("-brw needs an address argument\n");
4811 exim_exit(EXIT_FAILURE, US"main");
4813 rewrite_test(argv[test_rewrite_arg]);
4814 exim_exit(EXIT_SUCCESS, US"main");
4817 /* A locally-supplied message is considered to be coming from a local user
4818 unless a trusted caller supplies a sender address with -f, or is passing in the
4819 message via SMTP (inetd invocation or otherwise). */
4821 if ( !sender_address && !smtp_input
4822 || !f.trusted_caller && filter_test == FTEST_NONE)
4824 f.sender_local = TRUE;
4826 /* A trusted caller can supply authenticated_sender and authenticated_id
4827 via -oMas and -oMai and if so, they will already be set. Otherwise, force
4828 defaults except when host checking. */
4830 if (!authenticated_sender && !host_checking)
4831 authenticated_sender = string_sprintf("%s@%s", originator_login,
4832 qualify_domain_sender);
4833 if (!authenticated_id && !host_checking)
4834 authenticated_id = originator_login;
4837 /* Trusted callers are always permitted to specify the sender address.
4838 Untrusted callers may specify it if it matches untrusted_set_sender, or if what
4839 is specified is the empty address. However, if a trusted caller does not
4840 specify a sender address for SMTP input, we leave sender_address unset. This
4841 causes the MAIL commands to be honoured. */
4843 if ( !smtp_input && !sender_address
4844 || !receive_check_set_sender(sender_address))
4846 /* Either the caller is not permitted to set a general sender, or this is
4847 non-SMTP input and the trusted caller has not set a sender. If there is no
4848 sender, or if a sender other than <> is set, override with the originator's
4849 login (which will get qualified below), except when checking things. */
4851 if (sender_address == NULL /* No sender_address set */
4853 (sender_address[0] != 0 && /* Non-empty sender address, AND */
4854 !checking)) /* Not running tests, including filter tests */
4856 sender_address = originator_login;
4857 f.sender_address_forced = FALSE;
4858 sender_address_domain = 0;
4862 /* Remember whether an untrusted caller set the sender address */
4864 f.sender_set_untrusted = sender_address != originator_login && !f.trusted_caller;
4866 /* Ensure that the sender address is fully qualified unless it is the empty
4867 address, which indicates an error message, or doesn't exist (root caller, smtp
4868 interface, no -f argument). */
4870 if (sender_address && *sender_address && sender_address_domain == 0)
4871 sender_address = string_sprintf("%s@%s", local_part_quote(sender_address),
4872 qualify_domain_sender);
4874 DEBUG(D_receive) debug_printf("sender address = %s\n", sender_address);
4876 /* Handle a request to verify a list of addresses, or test them for delivery.
4877 This must follow the setting of the sender address, since routers can be
4878 predicated upon the sender. If no arguments are given, read addresses from
4879 stdin. Set debug_level to at least D_v to get full output for address testing.
4882 if (verify_address_mode || f.address_test_mode)
4885 int flags = vopt_qualify;
4887 if (verify_address_mode)
4889 if (!verify_as_sender) flags |= vopt_is_recipient;
4890 DEBUG(D_verify) debug_print_ids(US"Verifying:");
4895 flags |= vopt_is_recipient;
4896 debug_selector |= D_v;
4897 debug_file = stderr;
4898 debug_fd = fileno(debug_file);
4899 DEBUG(D_verify) debug_print_ids(US"Address testing:");
4902 if (recipients_arg < argc)
4904 while (recipients_arg < argc)
4906 /* Supplied addresses are tainted since they come from a user */
4907 uschar * s = string_copy_taint(argv[recipients_arg++], TRUE);
4910 BOOL finished = FALSE;
4911 uschar *ss = parse_find_address_end(s, FALSE);
4912 if (*ss == ',') *ss = 0; else finished = TRUE;
4913 test_address(s, flags, &exit_value);
4916 while (*++s == ',' || isspace(*s)) ;
4923 uschar * s = get_stdinput(NULL, NULL);
4925 test_address(string_copy_taint(s, TRUE), flags, &exit_value);
4929 exim_exit(exit_value, US"main");
4932 /* Handle expansion checking. Either expand items on the command line, or read
4933 from stdin if there aren't any. If -Mset was specified, load the message so
4934 that its variables can be used, but restrict this facility to admin users.
4935 Otherwise, if -bem was used, read a message from stdin. */
4939 dns_init(FALSE, FALSE, FALSE);
4940 if (msg_action_arg > 0 && msg_action == MSG_LOAD)
4942 uschar spoolname[256]; /* Not big_buffer; used in spool_read_header() */
4944 exim_fail("exim: permission denied\n");
4945 message_id = argv[msg_action_arg];
4946 (void)string_format(spoolname, sizeof(spoolname), "%s-H", message_id);
4947 if ((deliver_datafile = spool_open_datafile(message_id)) < 0)
4948 printf ("Failed to load message datafile %s\n", message_id);
4949 if (spool_read_header(spoolname, TRUE, FALSE) != spool_read_OK)
4950 printf ("Failed to load message %s\n", message_id);
4953 /* Read a test message from a file. We fudge it up to be on stdin, saving
4954 stdin itself for later reading of expansion strings. */
4956 else if (expansion_test_message)
4958 int save_stdin = dup(0);
4959 int fd = Uopen(expansion_test_message, O_RDONLY, 0);
4961 exim_fail("exim: failed to open %s: %s\n", expansion_test_message,
4964 filter_test = FTEST_USER; /* Fudge to make it look like filter test */
4965 message_ended = END_NOTENDED;
4966 read_message_body(receive_msg(extract_recipients));
4967 message_linecount += body_linecount;
4968 (void)dup2(save_stdin, 0);
4969 (void)close(save_stdin);
4970 clearerr(stdin); /* Required by Darwin */
4973 /* Only admin users may see config-file macros this way */
4975 if (!f.admin_user) macros_user = macros = mlast = NULL;
4977 /* Allow $recipients for this testing */
4979 f.enable_dollar_recipients = TRUE;
4981 /* Expand command line items */
4983 if (recipients_arg < argc)
4984 while (recipients_arg < argc)
4985 expansion_test_line(argv[recipients_arg++]);
4991 char *(*fn_readline)(const char *) = NULL;
4992 void (*fn_addhist)(const char *) = NULL;
4996 void *dlhandle = set_readline(&fn_readline, &fn_addhist);
4999 while (s = get_stdinput(fn_readline, fn_addhist))
5000 expansion_test_line(s);
5003 if (dlhandle) dlclose(dlhandle);
5007 /* The data file will be open after -Mset */
5009 if (deliver_datafile >= 0)
5011 (void)close(deliver_datafile);
5012 deliver_datafile = -1;
5015 exim_exit(EXIT_SUCCESS, US"main: expansion test");
5019 /* The active host name is normally the primary host name, but it can be varied
5020 for hosts that want to play several parts at once. We need to ensure that it is
5021 set for host checking, and for receiving messages. */
5023 smtp_active_hostname = primary_hostname;
5024 if (raw_active_hostname != NULL)
5026 uschar *nah = expand_string(raw_active_hostname);
5029 if (!f.expand_string_forcedfail)
5030 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to expand \"%s\" "
5031 "(smtp_active_hostname): %s", raw_active_hostname,
5032 expand_string_message);
5034 else if (nah[0] != 0) smtp_active_hostname = nah;
5037 /* Handle host checking: this facility mocks up an incoming SMTP call from a
5038 given IP address so that the blocking and relay configuration can be tested.
5039 Unless a sender_ident was set by -oMt, we discard it (the default is the
5040 caller's login name). An RFC 1413 call is made only if we are running in the
5041 test harness and an incoming interface and both ports are specified, because
5042 there is no TCP/IP call to find the ident for. */
5049 if (!sender_ident_set)
5051 sender_ident = NULL;
5052 if (f.running_in_test_harness && sender_host_port
5053 && interface_address && interface_port)
5054 verify_get_ident(1223); /* note hardwired port number */
5057 /* In case the given address is a non-canonical IPv6 address, canonicalize
5058 it. The code works for both IPv4 and IPv6, as it happens. */
5060 size = host_aton(sender_host_address, x);
5061 sender_host_address = store_get(48, FALSE); /* large enough for full IPv6 */
5062 (void)host_nmtoa(size, x, -1, sender_host_address, ':');
5064 /* Now set up for testing */
5066 host_build_sender_fullhost();
5070 f.sender_local = FALSE;
5071 f.sender_host_notsocket = TRUE;
5072 debug_file = stderr;
5073 debug_fd = fileno(debug_file);
5074 fprintf(stdout, "\n**** SMTP testing session as if from host %s\n"
5075 "**** but without any ident (RFC 1413) callback.\n"
5076 "**** This is not for real!\n\n",
5077 sender_host_address);
5079 memset(sender_host_cache, 0, sizeof(sender_host_cache));
5080 if (verify_check_host(&hosts_connection_nolog) == OK)
5081 BIT_CLEAR(log_selector, log_selector_size, Li_smtp_connection);
5082 log_write(L_smtp_connection, LOG_MAIN, "%s", smtp_get_connection_info());
5084 /* NOTE: We do *not* call smtp_log_no_mail() if smtp_start_session() fails,
5085 because a log line has already been written for all its failure exists
5086 (usually "connection refused: <reason>") and writing another one is
5087 unnecessary clutter. */
5089 if (smtp_start_session())
5091 for (; (reset_point = store_mark()); store_reset(reset_point))
5093 if (smtp_setup_msg() <= 0) break;
5094 if (!receive_msg(FALSE)) break;
5096 return_path = sender_address = NULL;
5097 dnslist_domain = dnslist_matched = NULL;
5098 #ifndef DISABLE_DKIM
5099 dkim_cur_signer = NULL;
5102 deliver_localpart_orig = NULL;
5103 deliver_domain_orig = NULL;
5104 callout_address = sending_ip_address = NULL;
5105 sender_rate = sender_rate_limit = sender_rate_period = NULL;
5109 exim_exit(EXIT_SUCCESS, US"main");
5113 /* Arrange for message reception if recipients or SMTP were specified;
5114 otherwise complain unless a version print (-bV) happened or this is a filter
5115 verification test or info dump.
5116 In the former case, show the configuration file name. */
5118 if (recipients_arg >= argc && !extract_recipients && !smtp_input)
5120 if (version_printed)
5122 if (Ustrchr(config_main_filelist, ':'))
5123 printf("Configuration file search path is %s\n", config_main_filelist);
5124 printf("Configuration file is %s\n", config_main_filename);
5125 return EXIT_SUCCESS;
5128 if (info_flag != CMDINFO_NONE)
5130 show_exim_information(info_flag, info_stdout ? stdout : stderr);
5131 return info_stdout ? EXIT_SUCCESS : EXIT_FAILURE;
5134 if (filter_test == FTEST_NONE)
5135 exim_usage(called_as);
5139 /* If mua_wrapper is set, Exim is being used to turn an MUA that submits on the
5140 standard input into an MUA that submits to a smarthost over TCP/IP. We know
5141 that we are not called from inetd, because that is rejected above. The
5142 following configuration settings are forced here:
5144 (1) Synchronous delivery (-odi)
5145 (2) Errors to stderr (-oep == -oeq)
5146 (3) No parallel remote delivery
5147 (4) Unprivileged delivery
5149 We don't force overall queueing options because there are several of them;
5150 instead, queueing is avoided below when mua_wrapper is set. However, we do need
5151 to override any SMTP queueing. */
5155 f.synchronous_delivery = TRUE;
5156 arg_error_handling = ERRORS_STDERR;
5157 remote_max_parallel = 1;
5158 deliver_drop_privilege = TRUE;
5159 f.queue_smtp = FALSE;
5160 queue_smtp_domains = NULL;
5162 message_utf8_downconvert = -1; /* convert-if-needed */
5167 /* Prepare to accept one or more new messages on the standard input. When a
5168 message has been read, its id is returned in message_id[]. If doing immediate
5169 delivery, we fork a delivery process for each received message, except for the
5170 last one, where we can save a process switch.
5172 It is only in non-smtp mode that error_handling is allowed to be changed from
5173 its default of ERRORS_SENDER by argument. (Idle thought: are any of the
5174 sendmail error modes other than -oem ever actually used? Later: yes.) */
5176 if (!smtp_input) error_handling = arg_error_handling;
5178 /* If this is an inetd call, ensure that stderr is closed to prevent panic
5179 logging being sent down the socket and make an identd call to get the
5182 else if (f.is_inetd)
5184 (void)fclose(stderr);
5185 exim_nullstd(); /* Re-open to /dev/null */
5186 verify_get_ident(IDENT_PORT);
5187 host_build_sender_fullhost();
5188 set_process_info("handling incoming connection from %s via inetd",
5192 /* If the sender host address has been set, build sender_fullhost if it hasn't
5193 already been done (which it will have been for inetd). This caters for the
5194 case when it is forced by -oMa. However, we must flag that it isn't a socket,
5195 so that the test for IP options is skipped for -bs input. */
5197 if (sender_host_address && !sender_fullhost)
5199 host_build_sender_fullhost();
5200 set_process_info("handling incoming connection from %s via -oMa",
5202 f.sender_host_notsocket = TRUE;
5205 /* Otherwise, set the sender host as unknown except for inetd calls. This
5206 prevents host checking in the case of -bs not from inetd and also for -bS. */
5208 else if (!f.is_inetd) f.sender_host_unknown = TRUE;
5210 /* If stdout does not exist, then dup stdin to stdout. This can happen
5211 if exim is started from inetd. In this case fd 0 will be set to the socket,
5212 but fd 1 will not be set. This also happens for passed SMTP channels. */
5214 if (fstat(1, &statbuf) < 0) (void)dup2(0, 1);
5216 /* Set up the incoming protocol name and the state of the program. Root is
5217 allowed to force received protocol via the -oMr option above. If we have come
5218 via inetd, the process info has already been set up. We don't set
5219 received_protocol here for smtp input, as it varies according to
5220 batch/HELO/EHLO/AUTH/TLS. */
5224 if (!f.is_inetd) set_process_info("accepting a local %sSMTP message from <%s>",
5225 smtp_batched_input? "batched " : "",
5226 (sender_address!= NULL)? sender_address : originator_login);
5230 int old_pool = store_pool;
5231 store_pool = POOL_PERM;
5232 if (!received_protocol)
5233 received_protocol = string_sprintf("local%s", called_as);
5234 store_pool = old_pool;
5235 set_process_info("accepting a local non-SMTP message from <%s>",
5239 /* Initialize the session_local_queue-only flag (this will be ignored if
5240 mua_wrapper is set) */
5243 session_local_queue_only = queue_only;
5245 /* For non-SMTP and for batched SMTP input, check that there is enough space on
5246 the spool if so configured. On failure, we must not attempt to send an error
5247 message! (For interactive SMTP, the check happens at MAIL FROM and an SMTP
5248 error code is given.) */
5250 if ((!smtp_input || smtp_batched_input) && !receive_check_fs(0))
5251 exim_fail("exim: insufficient disk space\n");
5253 /* If this is smtp input of any kind, real or batched, handle the start of the
5256 NOTE: We do *not* call smtp_log_no_mail() if smtp_start_session() fails,
5257 because a log line has already been written for all its failure exists
5258 (usually "connection refused: <reason>") and writing another one is
5259 unnecessary clutter. */
5265 memset(sender_host_cache, 0, sizeof(sender_host_cache));
5266 if (verify_check_host(&hosts_connection_nolog) == OK)
5267 BIT_CLEAR(log_selector, log_selector_size, Li_smtp_connection);
5268 log_write(L_smtp_connection, LOG_MAIN, "%s", smtp_get_connection_info());
5269 if (!smtp_start_session())
5272 exim_exit(EXIT_SUCCESS, US"smtp_start toplevel");
5276 /* Otherwise, set up the input size limit here. */
5280 thismessage_size_limit = expand_string_integer(message_size_limit, TRUE);
5281 if (expand_string_message)
5282 if (thismessage_size_limit == -1)
5283 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to expand "
5284 "message_size_limit: %s", expand_string_message);
5286 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "invalid value for "
5287 "message_size_limit: %s", expand_string_message);
5290 /* Loop for several messages when reading SMTP input. If we fork any child
5291 processes, we don't want to wait for them unless synchronous delivery is
5292 requested, so set SIGCHLD to SIG_IGN in that case. This is not necessarily the
5293 same as SIG_DFL, despite the fact that documentation often lists the default as
5294 "ignore". This is a confusing area. This is what I know:
5296 At least on some systems (e.g. Solaris), just setting SIG_IGN causes child
5297 processes that complete simply to go away without ever becoming defunct. You
5298 can't then wait for them - but we don't want to wait for them in the
5299 non-synchronous delivery case. However, this behaviour of SIG_IGN doesn't
5300 happen for all OS (e.g. *BSD is different).
5302 But that's not the end of the story. Some (many? all?) systems have the
5303 SA_NOCLDWAIT option for sigaction(). This requests the behaviour that Solaris
5304 has by default, so it seems that the difference is merely one of default
5305 (compare restarting vs non-restarting signals).
5307 To cover all cases, Exim sets SIG_IGN with SA_NOCLDWAIT here if it can. If not,
5308 it just sets SIG_IGN. To be on the safe side it also calls waitpid() at the end
5309 of the loop below. Paranoia rules.
5311 February 2003: That's *still* not the end of the story. There are now versions
5312 of Linux (where SIG_IGN does work) that are picky. If, having set SIG_IGN, a
5313 process then calls waitpid(), a grumble is written to the system log, because
5314 this is logically inconsistent. In other words, it doesn't like the paranoia.
5315 As a consequence of this, the waitpid() below is now excluded if we are sure
5316 that SIG_IGN works. */
5318 if (!f.synchronous_delivery)
5321 struct sigaction act;
5322 act.sa_handler = SIG_IGN;
5323 sigemptyset(&(act.sa_mask));
5324 act.sa_flags = SA_NOCLDWAIT;
5325 sigaction(SIGCHLD, &act, NULL);
5327 signal(SIGCHLD, SIG_IGN);
5331 /* Save the current store pool point, for resetting at the start of
5332 each message, and save the real sender address, if any. */
5334 real_sender_address = sender_address;
5336 /* Loop to receive messages; receive_msg() returns TRUE if there are more
5337 messages to be read (SMTP input), or FALSE otherwise (not SMTP, or SMTP channel
5342 reset_point = store_mark();
5345 /* Handle the SMTP case; call smtp_setup_mst() to deal with the initial SMTP
5346 input and build the recipients list, before calling receive_msg() to read the
5347 message proper. Whatever sender address is given in the SMTP transaction is
5348 often ignored for local senders - we use the actual sender, which is normally
5349 either the underlying user running this process or a -f argument provided by
5350 a trusted caller. It is saved in real_sender_address. The test for whether to
5351 accept the SMTP sender is encapsulated in receive_check_set_sender(). */
5356 if ((rc = smtp_setup_msg()) > 0)
5358 if (real_sender_address != NULL &&
5359 !receive_check_set_sender(sender_address))
5361 sender_address = raw_sender = real_sender_address;
5362 sender_address_unrewritten = NULL;
5365 /* For batched SMTP, we have to run the acl_not_smtp_start ACL, since it
5366 isn't really SMTP, so no other ACL will run until the acl_not_smtp one at
5367 the very end. The result of the ACL is ignored (as for other non-SMTP
5368 messages). It is run for its potential side effects. */
5370 if (smtp_batched_input && acl_not_smtp_start != NULL)
5372 uschar *user_msg, *log_msg;
5373 f.enable_dollar_recipients = TRUE;
5374 (void)acl_check(ACL_WHERE_NOTSMTP_START, NULL, acl_not_smtp_start,
5375 &user_msg, &log_msg);
5376 f.enable_dollar_recipients = FALSE;
5379 /* Now get the data for the message */
5381 more = receive_msg(extract_recipients);
5382 if (message_id[0] == 0)
5384 cancel_cutthrough_connection(TRUE, US"receive dropped");
5385 if (more) goto moreloop;
5386 smtp_log_no_mail(); /* Log no mail if configured */
5387 exim_exit(EXIT_FAILURE, US"receive toplevel");
5392 cancel_cutthrough_connection(TRUE, US"message setup dropped");
5393 smtp_log_no_mail(); /* Log no mail if configured */
5394 exim_exit(rc ? EXIT_FAILURE : EXIT_SUCCESS, US"msg setup toplevel");
5398 /* In the non-SMTP case, we have all the information from the command
5399 line, but must process it in case it is in the more general RFC822
5400 format, and in any case, to detect syntax errors. Also, it appears that
5401 the use of comma-separated lists as single arguments is common, so we
5402 had better support them. */
5407 int count = argc - recipients_arg;
5408 uschar **list = argv + recipients_arg;
5410 /* These options cannot be changed dynamically for non-SMTP messages */
5412 f.active_local_sender_retain = local_sender_retain;
5413 f.active_local_from_check = local_from_check;
5415 /* Save before any rewriting */
5417 raw_sender = string_copy(sender_address);
5419 /* Loop for each argument (supplied by user hence tainted) */
5421 for (int i = 0; i < count; i++)
5423 int start, end, domain;
5425 uschar * s = string_copy_taint(list[i], TRUE);
5427 /* Loop for each comma-separated address */
5431 BOOL finished = FALSE;
5433 uschar *ss = parse_find_address_end(s, FALSE);
5435 if (*ss == ',') *ss = 0; else finished = TRUE;
5437 /* Check max recipients - if -t was used, these aren't recipients */
5439 if (recipients_max > 0 && ++rcount > recipients_max &&
5440 !extract_recipients)
5441 if (error_handling == ERRORS_STDERR)
5443 fprintf(stderr, "exim: too many recipients\n");
5444 exim_exit(EXIT_FAILURE, US"main");
5448 moan_to_sender(ERRMESS_TOOMANYRECIP, NULL, NULL, stdin, TRUE)?
5449 errors_sender_rc : EXIT_FAILURE;
5453 BOOL b = allow_utf8_domains;
5454 allow_utf8_domains = TRUE;
5457 parse_extract_address(s, &errmess, &start, &end, &domain, FALSE);
5460 if (string_is_utf8(recipient))
5461 message_smtputf8 = TRUE;
5463 allow_utf8_domains = b;
5466 if (domain == 0 && !f.allow_unqualified_recipient)
5469 errmess = US"unqualified recipient address not allowed";
5472 if (recipient == NULL)
5474 if (error_handling == ERRORS_STDERR)
5476 fprintf(stderr, "exim: bad recipient address \"%s\": %s\n",
5477 string_printing(list[i]), errmess);
5478 exim_exit(EXIT_FAILURE, US"main");
5484 eblock.text1 = string_printing(list[i]);
5485 eblock.text2 = errmess;
5487 moan_to_sender(ERRMESS_BADARGADDRESS, &eblock, NULL, stdin, TRUE)?
5488 errors_sender_rc : EXIT_FAILURE;
5492 receive_add_recipient(string_copy_taint(recipient, TRUE), -1);
5495 while (*(++s) != 0 && (*s == ',' || isspace(*s)));
5499 /* Show the recipients when debugging */
5503 if (sender_address != NULL) debug_printf("Sender: %s\n", sender_address);
5504 if (recipients_list != NULL)
5506 debug_printf("Recipients:\n");
5507 for (int i = 0; i < recipients_count; i++)
5508 debug_printf(" %s\n", recipients_list[i].address);
5512 /* Run the acl_not_smtp_start ACL if required. The result of the ACL is
5513 ignored; rejecting here would just add complication, and it can just as
5514 well be done later. Allow $recipients to be visible in the ACL. */
5516 if (acl_not_smtp_start)
5518 uschar *user_msg, *log_msg;
5519 f.enable_dollar_recipients = TRUE;
5520 (void)acl_check(ACL_WHERE_NOTSMTP_START, NULL, acl_not_smtp_start,
5521 &user_msg, &log_msg);
5522 f.enable_dollar_recipients = FALSE;
5525 /* Pause for a while waiting for input. If none received in that time,
5526 close the logfile, if we had one open; then if we wait for a long-running
5527 datasource (months, in one use-case) log rotation will not leave us holding
5530 if (!receive_timeout)
5532 struct timeval t = { .tv_sec = 30*60, .tv_usec = 0 }; /* 30 minutes */
5535 FD_ZERO(&r); FD_SET(0, &r);
5536 if (select(1, &r, NULL, NULL, &t) == 0) mainlog_close();
5539 /* Read the data for the message. If filter_test is not FTEST_NONE, this
5540 will just read the headers for the message, and not write anything onto the
5543 message_ended = END_NOTENDED;
5544 more = receive_msg(extract_recipients);
5546 /* more is always FALSE here (not SMTP message) when reading a message
5547 for real; when reading the headers of a message for filter testing,
5548 it is TRUE if the headers were terminated by '.' and FALSE otherwise. */
5550 if (message_id[0] == 0) exim_exit(EXIT_FAILURE, US"main");
5551 } /* Non-SMTP message reception */
5553 /* If this is a filter testing run, there are headers in store, but
5554 no message on the spool. Run the filtering code in testing mode, setting
5555 the domain to the qualify domain and the local part to the current user,
5556 unless they have been set by options. The prefix and suffix are left unset
5557 unless specified. The the return path is set to to the sender unless it has
5558 already been set from a return-path header in the message. */
5560 if (filter_test != FTEST_NONE)
5562 deliver_domain = (ftest_domain != NULL)?
5563 ftest_domain : qualify_domain_recipient;
5564 deliver_domain_orig = deliver_domain;
5565 deliver_localpart = (ftest_localpart != NULL)?
5566 ftest_localpart : originator_login;
5567 deliver_localpart_orig = deliver_localpart;
5568 deliver_localpart_prefix = ftest_prefix;
5569 deliver_localpart_suffix = ftest_suffix;
5570 deliver_home = originator_home;
5572 if (return_path == NULL)
5574 printf("Return-path copied from sender\n");
5575 return_path = string_copy(sender_address);
5578 printf("Return-path = %s\n", (return_path[0] == 0)? US"<>" : return_path);
5579 printf("Sender = %s\n", (sender_address[0] == 0)? US"<>" : sender_address);
5581 receive_add_recipient(
5582 string_sprintf("%s%s%s@%s",
5583 (ftest_prefix == NULL)? US"" : ftest_prefix,
5585 (ftest_suffix == NULL)? US"" : ftest_suffix,
5586 deliver_domain), -1);
5588 printf("Recipient = %s\n", recipients_list[0].address);
5589 if (ftest_prefix != NULL) printf("Prefix = %s\n", ftest_prefix);
5590 if (ftest_suffix != NULL) printf("Suffix = %s\n", ftest_suffix);
5592 if (chdir("/")) /* Get away from wherever the user is running this from */
5594 DEBUG(D_receive) debug_printf("chdir(\"/\") failed\n");
5595 exim_exit(EXIT_FAILURE, US"main");
5598 /* Now we run either a system filter test, or a user filter test, or both.
5599 In the latter case, headers added by the system filter will persist and be
5600 available to the user filter. We need to copy the filter variables
5603 if ((filter_test & FTEST_SYSTEM) != 0)
5604 if (!filter_runtest(filter_sfd, filter_test_sfile, TRUE, more))
5605 exim_exit(EXIT_FAILURE, US"main");
5607 memcpy(filter_sn, filter_n, sizeof(filter_sn));
5609 if ((filter_test & FTEST_USER) != 0)
5610 if (!filter_runtest(filter_ufd, filter_test_ufile, FALSE, more))
5611 exim_exit(EXIT_FAILURE, US"main");
5613 exim_exit(EXIT_SUCCESS, US"main");
5616 /* Else act on the result of message reception. We should not get here unless
5617 message_id[0] is non-zero. If queue_only is set, session_local_queue_only
5618 will be TRUE. If it is not, check on the number of messages received in this
5621 if (!session_local_queue_only &&
5622 smtp_accept_queue_per_connection > 0 &&
5623 receive_messagecount > smtp_accept_queue_per_connection)
5625 session_local_queue_only = TRUE;
5626 queue_only_reason = 2;
5629 /* Initialize local_queue_only from session_local_queue_only. If it is false,
5630 and queue_only_load is set, check that the load average is below it. If it is
5631 not, set local_queue_only TRUE. If queue_only_load_latch is true (the
5632 default), we put the whole session into queue_only mode. It then remains this
5633 way for any subsequent messages on the same SMTP connection. This is a
5634 deliberate choice; even though the load average may fall, it doesn't seem
5635 right to deliver later messages on the same call when not delivering earlier
5636 ones. However, there are odd cases where this is not wanted, so this can be
5637 changed by setting queue_only_load_latch false. */
5639 local_queue_only = session_local_queue_only;
5640 if (!local_queue_only && queue_only_load >= 0)
5642 local_queue_only = (load_average = OS_GETLOADAVG()) > queue_only_load;
5643 if (local_queue_only)
5645 queue_only_reason = 3;
5646 if (queue_only_load_latch) session_local_queue_only = TRUE;
5650 /* If running as an MUA wrapper, all queueing options and freezing options
5654 local_queue_only = f.queue_only_policy = f.deliver_freeze = FALSE;
5656 /* Log the queueing here, when it will get a message id attached, but
5657 not if queue_only is set (case 0). Case 1 doesn't happen here (too many
5660 if (local_queue_only)
5662 cancel_cutthrough_connection(TRUE, US"no delivery; queueing");
5663 switch(queue_only_reason)
5666 log_write(L_delay_delivery,
5667 LOG_MAIN, "no immediate delivery: more than %d messages "
5668 "received in one connection", smtp_accept_queue_per_connection);
5672 log_write(L_delay_delivery,
5673 LOG_MAIN, "no immediate delivery: load average %.2f",
5674 (double)load_average/1000.0);
5679 else if (f.queue_only_policy || f.deliver_freeze)
5680 cancel_cutthrough_connection(TRUE, US"no delivery; queueing");
5682 /* Else do the delivery unless the ACL or local_scan() called for queue only
5683 or froze the message. Always deliver in a separate process. A fork failure is
5684 not a disaster, as the delivery will eventually happen on a subsequent queue
5685 run. The search cache must be tidied before the fork, as the parent will
5686 do it before exiting. The child will trigger a lookup failure and
5687 thereby defer the delivery if it tries to use (for example) a cached ldap
5688 connection that the parent has called unbind on. */
5695 if ((pid = exim_fork(US"local-accept delivery")) == 0)
5698 close_unwanted(); /* Close unwanted file descriptors and TLS */
5699 exim_nullstd(); /* Ensure std{in,out,err} exist */
5701 /* Re-exec Exim if we need to regain privilege (note: in mua_wrapper
5702 mode, deliver_drop_privilege is forced TRUE). */
5704 if (geteuid() != root_uid && !deliver_drop_privilege && !unprivileged)
5706 delivery_re_exec(CEE_EXEC_EXIT);
5707 /* Control does not return here. */
5710 /* No need to re-exec */
5712 rc = deliver_message(message_id, FALSE, FALSE);
5714 exim_underbar_exit(!mua_wrapper || rc == DELIVER_MUA_SUCCEEDED
5715 ? EXIT_SUCCESS : EXIT_FAILURE, US"cmdline-delivery");
5720 cancel_cutthrough_connection(TRUE, US"delivery fork failed");
5721 log_write(0, LOG_MAIN|LOG_PANIC, "failed to fork automatic delivery "
5722 "process: %s", strerror(errno));
5726 release_cutthrough_connection(US"msg passed for delivery");
5728 /* In the parent, wait if synchronous delivery is required. This will
5729 always be the case in MUA wrapper mode. */
5731 if (f.synchronous_delivery)
5734 while (wait(&status) != pid);
5735 if ((status & 0x00ff) != 0)
5736 log_write(0, LOG_MAIN|LOG_PANIC,
5737 "process %d crashed with signal %d while delivering %s",
5738 (int)pid, status & 0x00ff, message_id);
5739 if (mua_wrapper && (status & 0xffff) != 0) exim_exit(EXIT_FAILURE, US"main");
5744 /* The loop will repeat if more is TRUE. If we do not know know that the OS
5745 automatically reaps children (see comments above the loop), clear away any
5746 finished subprocesses here, in case there are lots of messages coming in
5747 from the same source. */
5749 #ifndef SIG_IGN_WORKS
5750 while (waitpid(-1, NULL, WNOHANG) > 0);
5754 return_path = sender_address = NULL;
5755 authenticated_sender = NULL;
5756 deliver_localpart_orig = NULL;
5757 deliver_domain_orig = NULL;
5758 deliver_host = deliver_host_address = NULL;
5759 dnslist_domain = dnslist_matched = NULL;
5760 #ifdef WITH_CONTENT_SCAN
5761 malware_name = NULL;
5763 callout_address = NULL;
5764 sending_ip_address = NULL;
5766 for(int i = 0; i < REGEX_VARS; i++) regex_vars[i] = NULL;
5768 store_reset(reset_point);
5771 exim_exit(EXIT_SUCCESS, US"main"); /* Never returns */
5772 return 0; /* To stop compiler warning */