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;
312 int save_errno = errno;
314 if (itval->it_value.tv_usec < 50 && itval->it_value.tv_sec == 0)
316 (void)sigemptyset(&sigmask); /* Empty mask */
317 (void)sigaddset(&sigmask, SIGALRM); /* Add SIGALRM */
318 (void)sigprocmask(SIG_BLOCK, &sigmask, &old_sigmask); /* Block SIGALRM */
319 if (setitimer(ITIMER_REAL, itval, NULL) < 0) /* Start timer */
320 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
321 "setitimer() failed: %s", strerror(errno));
322 (void)sigfillset(&sigmask); /* All signals */
323 (void)sigdelset(&sigmask, SIGALRM); /* Remove SIGALRM */
324 (void)sigsuspend(&sigmask); /* Until SIGALRM */
325 (void)sigprocmask(SIG_SETMASK, &old_sigmask, NULL); /* Restore mask */
327 sigalrm_seen = FALSE;
333 /*************************************************
334 * Millisecond sleep function *
335 *************************************************/
337 /* The basic sleep() function has a granularity of 1 second, which is too rough
338 in some cases - for example, when using an increasing delay to slow down
341 Argument: number of millseconds
348 struct itimerval itval = {.it_interval = {.tv_sec = 0, .tv_usec = 0},
349 .it_value = {.tv_sec = msec/1000,
350 .tv_usec = (msec % 1000) * 1000}};
356 /*************************************************
357 * Compare microsecond times *
358 *************************************************/
365 Returns: -1, 0, or +1
369 exim_tvcmp(struct timeval *t1, struct timeval *t2)
371 if (t1->tv_sec > t2->tv_sec) return +1;
372 if (t1->tv_sec < t2->tv_sec) return -1;
373 if (t1->tv_usec > t2->tv_usec) return +1;
374 if (t1->tv_usec < t2->tv_usec) return -1;
381 /*************************************************
382 * Clock tick wait function *
383 *************************************************/
385 #ifdef _POSIX_MONOTONIC_CLOCK
386 /* Amount CLOCK_MONOTONIC is behind realtime, at startup. */
387 static struct timespec offset_ts;
390 exim_clock_init(void)
393 if (clock_gettime(CLOCK_MONOTONIC, &offset_ts) != 0) return;
394 (void)gettimeofday(&tv, NULL);
395 offset_ts.tv_sec = tv.tv_sec - offset_ts.tv_sec;
396 offset_ts.tv_nsec = tv.tv_usec * 1000 - offset_ts.tv_nsec;
397 if (offset_ts.tv_nsec >= 0) return;
399 offset_ts.tv_nsec += 1000*1000*1000;
404 /* Exim uses a time + a pid to generate a unique identifier in two places: its
405 message IDs, and in file names for maildir deliveries. Because some OS now
406 re-use pids within the same second, sub-second times are now being used.
407 However, for absolute certainty, we must ensure the clock has ticked before
408 allowing the relevant process to complete. At the time of implementation of
409 this code (February 2003), the speed of processors is such that the clock will
410 invariably have ticked already by the time a process has done its job. This
411 function prepares for the time when things are faster - and it also copes with
412 clocks that go backwards.
415 tgt_tv A timeval which was used to create uniqueness; its usec field
416 has been rounded down to the value of the resolution.
417 We want to be sure the current time is greater than this.
418 resolution The resolution that was used to divide the microseconds
419 (1 for maildir, larger for message ids)
425 exim_wait_tick(struct timeval * tgt_tv, int resolution)
427 struct timeval now_tv;
428 long int now_true_usec;
430 #ifdef _POSIX_MONOTONIC_CLOCK
431 struct timespec now_ts;
433 if (clock_gettime(CLOCK_MONOTONIC, &now_ts) == 0)
435 now_ts.tv_sec += offset_ts.tv_sec;
436 if ((now_ts.tv_nsec += offset_ts.tv_nsec) >= 1000*1000*1000)
439 now_ts.tv_nsec -= 1000*1000*1000;
441 now_tv.tv_sec = now_ts.tv_sec;
442 now_true_usec = (now_ts.tv_nsec / (resolution * 1000)) * resolution;
443 now_tv.tv_usec = now_true_usec;
448 (void)gettimeofday(&now_tv, NULL);
449 now_true_usec = now_tv.tv_usec;
450 now_tv.tv_usec = (now_true_usec/resolution) * resolution;
453 while (exim_tvcmp(&now_tv, tgt_tv) <= 0)
455 struct itimerval itval;
456 itval.it_interval.tv_sec = 0;
457 itval.it_interval.tv_usec = 0;
458 itval.it_value.tv_sec = tgt_tv->tv_sec - now_tv.tv_sec;
459 itval.it_value.tv_usec = tgt_tv->tv_usec + resolution - now_true_usec;
461 /* We know that, overall, "now" is less than or equal to "then". Therefore, a
462 negative value for the microseconds is possible only in the case when "now"
463 is more than a second less than "tgt". That means that itval.it_value.tv_sec
464 is greater than zero. The following correction is therefore safe. */
466 if (itval.it_value.tv_usec < 0)
468 itval.it_value.tv_usec += 1000000;
469 itval.it_value.tv_sec -= 1;
472 DEBUG(D_transport|D_receive)
474 if (!f.running_in_test_harness)
476 debug_printf("tick check: " TIME_T_FMT ".%06lu " TIME_T_FMT ".%06lu\n",
477 tgt_tv->tv_sec, (long) tgt_tv->tv_usec,
478 now_tv.tv_sec, (long) now_tv.tv_usec);
479 debug_printf("waiting " TIME_T_FMT ".%06lu sec\n",
480 itval.it_value.tv_sec, (long) itval.it_value.tv_usec);
486 /* Be prapared to go around if the kernel does not implement subtick
487 granularity (GNU Hurd) */
489 (void)gettimeofday(&now_tv, NULL);
490 now_true_usec = now_tv.tv_usec;
491 now_tv.tv_usec = (now_true_usec/resolution) * resolution;
498 /*************************************************
499 * Call fopen() with umask 777 and adjust mode *
500 *************************************************/
502 /* Exim runs with umask(0) so that files created with open() have the mode that
503 is specified in the open() call. However, there are some files, typically in
504 the spool directory, that are created with fopen(). They end up world-writeable
505 if no precautions are taken. Although the spool directory is not accessible to
506 the world, this is an untidiness. So this is a wrapper function for fopen()
507 that sorts out the mode of the created file.
510 filename the file name
511 options the fopen() options
512 mode the required mode
514 Returns: the fopened FILE or NULL
518 modefopen(const uschar *filename, const char *options, mode_t mode)
520 mode_t saved_umask = umask(0777);
521 FILE *f = Ufopen(filename, options);
522 (void)umask(saved_umask);
523 if (f != NULL) (void)fchmod(fileno(f), mode);
528 /*************************************************
529 * Ensure stdin, stdout, and stderr exist *
530 *************************************************/
532 /* Some operating systems grumble if an exec() happens without a standard
533 input, output, and error (fds 0, 1, 2) being defined. The worry is that some
534 file will be opened and will use these fd values, and then some other bit of
535 code will assume, for example, that it can write error messages to stderr.
536 This function ensures that fds 0, 1, and 2 are open if they do not already
537 exist, by connecting them to /dev/null.
539 This function is also used to ensure that std{in,out,err} exist at all times,
540 so that if any library that Exim calls tries to use them, it doesn't crash.
551 for (int i = 0; i <= 2; i++)
553 if (fstat(i, &statbuf) < 0 && errno == EBADF)
555 if (devnull < 0) devnull = open("/dev/null", O_RDWR);
556 if (devnull < 0) log_write(0, LOG_MAIN|LOG_PANIC_DIE, "%s",
557 string_open_failed(errno, "/dev/null", NULL));
558 if (devnull != i) (void)dup2(devnull, i);
561 if (devnull > 2) (void)close(devnull);
567 /*************************************************
568 * Close unwanted file descriptors for delivery *
569 *************************************************/
571 /* This function is called from a new process that has been forked to deliver
572 an incoming message, either directly, or using exec.
574 We want any smtp input streams to be closed in this new process. However, it
575 has been observed that using fclose() here causes trouble. When reading in -bS
576 input, duplicate copies of messages have been seen. The files will be sharing a
577 file pointer with the parent process, and it seems that fclose() (at least on
578 some systems - I saw this on Solaris 2.5.1) messes with that file pointer, at
579 least sometimes. Hence we go for closing the underlying file descriptors.
581 If TLS is active, we want to shut down the TLS library, but without molesting
582 the parent's SSL connection.
584 For delivery of a non-SMTP message, we want to close stdin and stdout (and
585 stderr unless debugging) because the calling process might have set them up as
586 pipes and be waiting for them to close before it waits for the submission
587 process to terminate. If they aren't closed, they hold up the calling process
588 until the initial delivery process finishes, which is not what we want.
590 Exception: We do want it for synchronous delivery!
592 And notwithstanding all the above, if D_resolver is set, implying resolver
593 debugging, leave stdout open, because that's where the resolver writes its
596 When we close stderr (which implies we've also closed stdout), we also get rid
597 of any controlling terminal.
609 tls_close(NULL, TLS_NO_SHUTDOWN); /* Shut down the TLS library */
611 (void)close(fileno(smtp_in));
612 (void)close(fileno(smtp_out));
617 (void)close(0); /* stdin */
618 if ((debug_selector & D_resolver) == 0) (void)close(1); /* stdout */
619 if (debug_selector == 0) /* stderr */
621 if (!f.synchronous_delivery)
634 /*************************************************
636 *************************************************/
638 /* This function sets a new uid and gid permanently, optionally calling
639 initgroups() to set auxiliary groups. There are some special cases when running
640 Exim in unprivileged modes. In these situations the effective uid will not be
641 root; if we already have the right effective uid/gid, and don't need to
642 initialize any groups, leave things as they are.
647 igflag TRUE if initgroups() wanted
648 msg text to use in debugging output and failure log
650 Returns: nothing; bombs out on failure
654 exim_setugid(uid_t uid, gid_t gid, BOOL igflag, uschar *msg)
656 uid_t euid = geteuid();
657 gid_t egid = getegid();
659 if (euid == root_uid || euid != uid || egid != gid || igflag)
661 /* At least one OS returns +1 for initgroups failure, so just check for
666 struct passwd *pw = getpwuid(uid);
668 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "cannot run initgroups(): "
669 "no passwd entry for uid=%ld", (long int)uid);
671 if (initgroups(pw->pw_name, gid) != 0)
672 log_write(0,LOG_MAIN|LOG_PANIC_DIE,"initgroups failed for uid=%ld: %s",
673 (long int)uid, strerror(errno));
676 if (setgid(gid) < 0 || setuid(uid) < 0)
677 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "unable to set gid=%ld or uid=%ld "
678 "(euid=%ld): %s", (long int)gid, (long int)uid, (long int)euid, msg);
681 /* Debugging output included uid/gid and all groups */
685 int group_count, save_errno;
686 gid_t group_list[EXIM_GROUPLIST_SIZE];
687 debug_printf("changed uid/gid: %s\n uid=%ld gid=%ld pid=%ld\n", msg,
688 (long int)geteuid(), (long int)getegid(), (long int)getpid());
689 group_count = getgroups(nelem(group_list), group_list);
691 debug_printf(" auxiliary group list:");
693 for (int i = 0; i < group_count; i++) debug_printf(" %d", (int)group_list[i]);
694 else if (group_count < 0)
695 debug_printf(" <error: %s>", strerror(save_errno));
696 else debug_printf(" <none>");
704 /*************************************************
706 *************************************************/
708 /* Exim exits via this function so that it always clears up any open
714 Returns: does not return
723 debug_printf(">>>>>>>>>>>>>>>> Exim pid=%d (%s) terminating with rc=%d "
724 ">>>>>>>>>>>>>>>>\n",
725 (int)getpid(), process_purpose, rc);
731 exim_underbar_exit(int rc)
735 debug_printf(">>>>>>>>>>>>>>>> Exim pid=%d (%s) terminating with rc=%d "
736 ">>>>>>>>>>>>>>>>\n",
737 (int)getpid(), process_purpose, rc);
743 /* Print error string, then die */
745 exim_fail(const char * fmt, ...)
749 vfprintf(stderr, fmt, ap);
753 /* exim_chown_failure() called from exim_chown()/exim_fchown() on failure
754 of chown()/fchown(). See src/functions.h for more explanation */
756 exim_chown_failure(int fd, const uschar *name, uid_t owner, gid_t group)
758 int saved_errno = errno; /* from the preceeding chown call */
760 log_write(0, LOG_MAIN|LOG_PANIC,
761 __FILE__ ":%d: chown(%s, %d:%d) failed (%s)."
762 " Please contact the authors and refer to https://bugs.exim.org/show_bug.cgi?id=2391",
763 __LINE__, name?name:US"<unknown>", owner, group, strerror(errno));
765 /* I leave this here, commented, in case the "bug"(?) comes up again.
766 It is not an Exim bug, but we can provide a workaround.
772 if (0 == (fd < 0 ? stat(name, &buf) : fstat(fd, &buf)))
774 if (buf.st_uid == owner && buf.st_gid == group) return 0;
775 log_write(0, LOG_MAIN|LOG_PANIC, "Wrong ownership on %s", name);
777 else log_write(0, LOG_MAIN|LOG_PANIC, "Stat failed on %s: %s", name, strerror(errno));
785 /*************************************************
786 * Extract port from host address *
787 *************************************************/
789 /* Called to extract the port from the values given to -oMa and -oMi.
790 It also checks the syntax of the address, and terminates it before the
791 port data when a port is extracted.
794 address the address, with possible port on the end
796 Returns: the port, or zero if there isn't one
797 bombs out on a syntax error
801 check_port(uschar *address)
803 int port = host_address_extract_port(address);
804 if (string_is_ip_address(address, NULL) == 0)
805 exim_fail("exim abandoned: \"%s\" is not an IP address\n", address);
811 /*************************************************
812 * Test/verify an address *
813 *************************************************/
815 /* This function is called by the -bv and -bt code. It extracts a working
816 address from a full RFC 822 address. This isn't really necessary per se, but it
817 has the effect of collapsing source routes.
821 flags flag bits for verify_address()
822 exit_value to be set for failures
828 test_address(uschar *s, int flags, int *exit_value)
830 int start, end, domain;
831 uschar *parse_error = NULL;
832 uschar *address = parse_extract_address(s, &parse_error, &start, &end, &domain,
836 fprintf(stdout, "syntax error: %s\n", parse_error);
841 int rc = verify_address(deliver_make_addr(address,TRUE), stdout, flags, -1,
842 -1, -1, NULL, NULL, NULL);
843 if (rc == FAIL) *exit_value = 2;
844 else if (rc == DEFER && *exit_value == 0) *exit_value = 1;
850 /*************************************************
851 * Show supported features *
852 *************************************************/
855 show_db_version(FILE * f)
857 #ifdef DB_VERSION_STRING
860 fprintf(f, "Library version: BDB: Compile: %s\n", DB_VERSION_STRING);
861 fprintf(f, " Runtime: %s\n",
862 db_version(NULL, NULL, NULL));
865 fprintf(f, "Berkeley DB: %s\n", DB_VERSION_STRING);
867 #elif defined(BTREEVERSION) && defined(HASHVERSION)
869 fprintf(f, "Probably Berkeley DB version 1.8x (native mode)\n");
871 fprintf(f, "Probably Berkeley DB version 1.8x (compatibility mode)\n");
874 #elif defined(_DBM_RDONLY) || defined(dbm_dirfno)
875 fprintf(f, "Probably ndbm\n");
876 #elif defined(USE_TDB)
877 fprintf(f, "Using tdb\n");
880 fprintf(f, "Probably GDBM (native mode)\n");
882 fprintf(f, "Probably GDBM (compatibility mode)\n");
888 /* This function is called for -bV/--version and for -d to output the optional
889 features of the current Exim binary.
891 Arguments: a FILE for printing
896 show_whats_supported(FILE * fp)
898 DEBUG(D_any) {} else show_db_version(fp);
900 fprintf(fp, "Support for:");
901 #ifdef SUPPORT_CRYPTEQ
902 fprintf(fp, " crypteq");
905 fprintf(fp, " iconv()");
908 fprintf(fp, " IPv6");
910 #ifdef HAVE_SETCLASSRESOURCES
911 fprintf(fp, " use_setclassresources");
917 fprintf(fp, " Perl");
920 fprintf(fp, " Expand_dlfunc");
922 #ifdef USE_TCP_WRAPPERS
923 fprintf(fp, " TCPwrappers");
926 fprintf(fp, " GnuTLS");
929 fprintf(fp, " OpenSSL");
931 #ifdef SUPPORT_TRANSLATE_IP_ADDRESS
932 fprintf(fp, " translate_ip_address");
934 #ifdef SUPPORT_MOVE_FROZEN_MESSAGES
935 fprintf(fp, " move_frozen_messages");
937 #ifdef WITH_CONTENT_SCAN
938 fprintf(fp, " Content_Scanning");
941 fprintf(fp, " DANE");
944 fprintf(fp, " DKIM");
946 #ifndef DISABLE_DNSSEC
947 fprintf(fp, " DNSSEC");
949 #ifndef DISABLE_EVENT
950 fprintf(fp, " Event");
953 fprintf(fp, " I18N");
956 fprintf(fp, " OCSP");
958 #ifndef DISABLE_PIPE_CONNECT
959 fprintf(fp, " PIPE_CONNECT");
962 fprintf(fp, " PRDR");
965 fprintf(fp, " PROXY");
968 fprintf(fp, " SOCKS");
974 fprintf(fp, " DMARC");
978 if (f.tcp_fastopen_ok) fprintf(fp, " TCP_Fast_Open");
980 #ifdef EXPERIMENTAL_ARC
981 fprintf(fp, " Experimental_ARC");
983 #ifdef EXPERIMENTAL_BRIGHTMAIL
984 fprintf(fp, " Experimental_Brightmail");
986 #ifdef EXPERIMENTAL_DCC
987 fprintf(fp, " Experimental_DCC");
989 #ifdef EXPERIMENTAL_DSN_INFO
990 fprintf(fp, " Experimental_DSN_info");
992 #ifdef EXPERIMENTAL_LMDB
993 fprintf(fp, " Experimental_LMDB");
995 #ifdef EXPERIMENTAL_QUEUE_RAMP
996 fprintf(fp, " Experimental_Queue_Ramp");
998 #ifdef EXPERIMENTAL_QUEUEFILE
999 fprintf(fp, " Experimental_QUEUEFILE");
1001 #if defined(EXPERIMENTAL_SRS) || defined(EXPERIMENTAL_SRS_NATIVE)
1002 fprintf(fp, " Experimental_SRS");
1004 #ifdef EXPERIMENTAL_TLS_RESUME
1005 fprintf(fp, " Experimental_TLS_resume");
1009 fprintf(fp, "Lookups (built-in):");
1010 #if defined(LOOKUP_LSEARCH) && LOOKUP_LSEARCH!=2
1011 fprintf(fp, " lsearch wildlsearch nwildlsearch iplsearch");
1013 #if defined(LOOKUP_CDB) && LOOKUP_CDB!=2
1014 fprintf(fp, " cdb");
1016 #if defined(LOOKUP_DBM) && LOOKUP_DBM!=2
1017 fprintf(fp, " dbm dbmjz dbmnz");
1019 #if defined(LOOKUP_DNSDB) && LOOKUP_DNSDB!=2
1020 fprintf(fp, " dnsdb");
1022 #if defined(LOOKUP_DSEARCH) && LOOKUP_DSEARCH!=2
1023 fprintf(fp, " dsearch");
1025 #if defined(LOOKUP_IBASE) && LOOKUP_IBASE!=2
1026 fprintf(fp, " ibase");
1028 #if defined(LOOKUP_JSON) && LOOKUP_JSON!=2
1029 fprintf(fp, " json");
1031 #if defined(LOOKUP_LDAP) && LOOKUP_LDAP!=2
1032 fprintf(fp, " ldap ldapdn ldapm");
1034 #ifdef EXPERIMENTAL_LMDB
1035 fprintf(fp, " lmdb");
1037 #if defined(LOOKUP_MYSQL) && LOOKUP_MYSQL!=2
1038 fprintf(fp, " mysql");
1040 #if defined(LOOKUP_NIS) && LOOKUP_NIS!=2
1041 fprintf(fp, " nis nis0");
1043 #if defined(LOOKUP_NISPLUS) && LOOKUP_NISPLUS!=2
1044 fprintf(fp, " nisplus");
1046 #if defined(LOOKUP_ORACLE) && LOOKUP_ORACLE!=2
1047 fprintf(fp, " oracle");
1049 #if defined(LOOKUP_PASSWD) && LOOKUP_PASSWD!=2
1050 fprintf(fp, " passwd");
1052 #if defined(LOOKUP_PGSQL) && LOOKUP_PGSQL!=2
1053 fprintf(fp, " pgsql");
1055 #if defined(LOOKUP_REDIS) && LOOKUP_REDIS!=2
1056 fprintf(fp, " redis");
1058 #if defined(LOOKUP_SQLITE) && LOOKUP_SQLITE!=2
1059 fprintf(fp, " sqlite");
1061 #if defined(LOOKUP_TESTDB) && LOOKUP_TESTDB!=2
1062 fprintf(fp, " testdb");
1064 #if defined(LOOKUP_WHOSON) && LOOKUP_WHOSON!=2
1065 fprintf(fp, " whoson");
1069 auth_show_supported(fp);
1070 route_show_supported(fp);
1071 transport_show_supported(fp);
1073 #ifdef WITH_CONTENT_SCAN
1074 malware_show_supported(fp);
1077 if (fixed_never_users[0] > 0)
1080 fprintf(fp, "Fixed never_users: ");
1081 for (i = 1; i <= (int)fixed_never_users[0] - 1; i++)
1082 fprintf(fp, "%d:", (unsigned int)fixed_never_users[i]);
1083 fprintf(fp, "%d\n", (unsigned int)fixed_never_users[i]);
1086 fprintf(fp, "Configure owner: %d:%d\n", config_uid, config_gid);
1088 fprintf(fp, "Size of off_t: " SIZE_T_FMT "\n", sizeof(off_t));
1090 /* Everything else is details which are only worth reporting when debugging.
1091 Perhaps the tls_version_report should move into this too. */
1094 /* clang defines __GNUC__ (at least, for me) so test for it first */
1095 #if defined(__clang__)
1096 fprintf(fp, "Compiler: CLang [%s]\n", __clang_version__);
1097 #elif defined(__GNUC__)
1098 fprintf(fp, "Compiler: GCC [%s]\n",
1102 "? unknown version ?"
1106 fprintf(fp, "Compiler: <unknown>\n");
1109 #if defined(__GLIBC__) && !defined(__UCLIBC__)
1110 fprintf(fp, "Library version: Glibc: Compile: %d.%d\n",
1111 __GLIBC__, __GLIBC_MINOR__);
1112 if (__GLIBC_PREREQ(2, 1))
1113 fprintf(fp, " Runtime: %s\n",
1114 gnu_get_libc_version());
1117 show_db_version(fp);
1120 tls_version_report(fp);
1123 utf8_version_report(fp);
1126 spf_lib_version_report(fp);
1129 for (auth_info * authi = auths_available; *authi->driver_name != '\0'; ++authi)
1130 if (authi->version_report)
1131 (*authi->version_report)(fp);
1133 /* PCRE_PRERELEASE is either defined and empty or a bare sequence of
1134 characters; unless it's an ancient version of PCRE in which case it
1136 #ifndef PCRE_PRERELEASE
1137 # define PCRE_PRERELEASE
1140 #define EXPAND_AND_QUOTE(X) QUOTE(X)
1141 fprintf(fp, "Library version: PCRE: Compile: %d.%d%s\n"
1143 PCRE_MAJOR, PCRE_MINOR,
1144 EXPAND_AND_QUOTE(PCRE_PRERELEASE) "",
1147 #undef EXPAND_AND_QUOTE
1150 for (int i = 0; i < lookup_list_count; i++)
1151 if (lookup_list[i]->version_report)
1152 lookup_list[i]->version_report(fp);
1154 #ifdef WHITELIST_D_MACROS
1155 fprintf(fp, "WHITELIST_D_MACROS: \"%s\"\n", WHITELIST_D_MACROS);
1157 fprintf(fp, "WHITELIST_D_MACROS unset\n");
1159 #ifdef TRUSTED_CONFIG_LIST
1160 fprintf(fp, "TRUSTED_CONFIG_LIST: \"%s\"\n", TRUSTED_CONFIG_LIST);
1162 fprintf(fp, "TRUSTED_CONFIG_LIST unset\n");
1169 /*************************************************
1170 * Show auxiliary information about Exim *
1171 *************************************************/
1174 show_exim_information(enum commandline_info request, FILE *stream)
1179 fprintf(stream, "Oops, something went wrong.\n");
1183 "The -bI: flag takes a string indicating which information to provide.\n"
1184 "If the string is not recognised, you'll get this help (on stderr).\n"
1186 " exim -bI:help this information\n"
1187 " exim -bI:dscp list of known dscp value keywords\n"
1188 " exim -bI:sieve list of supported sieve extensions\n"
1192 for (const uschar ** pp = exim_sieve_extension_list; *pp; ++pp)
1193 fprintf(stream, "%s\n", *pp);
1196 dscp_list_to_stream(stream);
1202 /*************************************************
1203 * Quote a local part *
1204 *************************************************/
1206 /* This function is used when a sender address or a From: or Sender: header
1207 line is being created from the caller's login, or from an authenticated_id. It
1208 applies appropriate quoting rules for a local part.
1210 Argument: the local part
1211 Returns: the local part, quoted if necessary
1215 local_part_quote(uschar *lpart)
1217 BOOL needs_quote = FALSE;
1220 for (uschar * t = lpart; !needs_quote && *t != 0; t++)
1222 needs_quote = !isalnum(*t) && strchr("!#$%&'*+-/=?^_`{|}~", *t) == NULL &&
1223 (*t != '.' || t == lpart || t[1] == 0);
1226 if (!needs_quote) return lpart;
1228 g = string_catn(NULL, US"\"", 1);
1232 uschar *nq = US Ustrpbrk(lpart, "\\\"");
1235 g = string_cat(g, lpart);
1238 g = string_catn(g, lpart, nq - lpart);
1239 g = string_catn(g, US"\\", 1);
1240 g = string_catn(g, nq, 1);
1244 g = string_catn(g, US"\"", 1);
1245 return string_from_gstring(g);
1251 /*************************************************
1252 * Load readline() functions *
1253 *************************************************/
1255 /* This function is called from testing executions that read data from stdin,
1256 but only when running as the calling user. Currently, only -be does this. The
1257 function loads the readline() function library and passes back the functions.
1258 On some systems, it needs the curses library, so load that too, but try without
1259 it if loading fails. All this functionality has to be requested at build time.
1262 fn_readline_ptr pointer to where to put the readline pointer
1263 fn_addhist_ptr pointer to where to put the addhistory function
1265 Returns: the dlopen handle or NULL on failure
1269 set_readline(char * (**fn_readline_ptr)(const char *),
1270 void (**fn_addhist_ptr)(const char *))
1273 void *dlhandle_curses = dlopen("libcurses." DYNLIB_FN_EXT, RTLD_GLOBAL|RTLD_LAZY);
1275 dlhandle = dlopen("libreadline." DYNLIB_FN_EXT, RTLD_GLOBAL|RTLD_NOW);
1276 if (dlhandle_curses) dlclose(dlhandle_curses);
1280 /* Checked manual pages; at least in GNU Readline 6.1, the prototypes are:
1281 * char * readline (const char *prompt);
1282 * void add_history (const char *string);
1284 *fn_readline_ptr = (char *(*)(const char*))dlsym(dlhandle, "readline");
1285 *fn_addhist_ptr = (void(*)(const char*))dlsym(dlhandle, "add_history");
1288 DEBUG(D_any) debug_printf("failed to load readline: %s\n", dlerror());
1296 /*************************************************
1297 * Get a line from stdin for testing things *
1298 *************************************************/
1300 /* This function is called when running tests that can take a number of lines
1301 of input (for example, -be and -bt). It handles continuations and trailing
1302 spaces. And prompting and a blank line output on eof. If readline() is in use,
1303 the arguments are non-NULL and provide the relevant functions.
1306 fn_readline readline function or NULL
1307 fn_addhist addhist function or NULL
1309 Returns: pointer to dynamic memory, or NULL at end of file
1313 get_stdinput(char *(*fn_readline)(const char *), void(*fn_addhist)(const char *))
1317 if (!fn_readline) { printf("> "); fflush(stdout); }
1319 for (int i = 0;; i++)
1321 uschar buffer[1024];
1325 char *readline_line = NULL;
1328 if (!(readline_line = fn_readline((i > 0)? "":"> "))) break;
1329 if (*readline_line != 0 && fn_addhist) fn_addhist(readline_line);
1330 p = US readline_line;
1335 /* readline() not in use */
1338 if (Ufgets(buffer, sizeof(buffer), stdin) == NULL) break;
1342 /* Handle the line */
1344 ss = p + (int)Ustrlen(p);
1345 while (ss > p && isspace(ss[-1])) ss--;
1348 while (p < ss && isspace(*p)) p++; /* leading space after cont */
1350 g = string_catn(g, p, ss - p);
1353 if (fn_readline) free(readline_line);
1356 /* g can only be NULL if ss==p */
1357 if (ss == p || g->s[g->ptr-1] != '\\')
1361 (void) string_from_gstring(g);
1364 if (!g) printf("\n");
1365 return string_from_gstring(g);
1370 /*************************************************
1371 * Output usage information for the program *
1372 *************************************************/
1374 /* This function is called when there are no recipients
1375 or a specific --help argument was added.
1378 progname information on what name we were called by
1380 Returns: DOES NOT RETURN
1384 exim_usage(uschar *progname)
1387 /* Handle specific program invocation variants */
1388 if (Ustrcmp(progname, US"-mailq") == 0)
1390 "mailq - list the contents of the mail queue\n\n"
1391 "For a list of options, see the Exim documentation.\n");
1393 /* Generic usage - we output this whatever happens */
1395 "Exim is a Mail Transfer Agent. It is normally called by Mail User Agents,\n"
1396 "not directly from a shell command line. Options and/or arguments control\n"
1397 "what it does when called. For a list of options, see the Exim documentation.\n");
1402 /*************************************************
1403 * Validate that the macros given are okay *
1404 *************************************************/
1406 /* Typically, Exim will drop privileges if macros are supplied. In some
1407 cases, we want to not do so.
1409 Arguments: opt_D_used - true if the commandline had a "-D" option
1410 Returns: true if trusted, false otherwise
1414 macros_trusted(BOOL opt_D_used)
1416 #ifdef WHITELIST_D_MACROS
1417 uschar *whitelisted, *end, *p, **whites;
1418 int white_count, i, n;
1420 BOOL prev_char_item, found;
1425 #ifndef WHITELIST_D_MACROS
1429 /* We only trust -D overrides for some invoking users:
1430 root, the exim run-time user, the optional config owner user.
1431 I don't know why config-owner would be needed, but since they can own the
1432 config files anyway, there's no security risk to letting them override -D. */
1433 if ( ! ((real_uid == root_uid)
1434 || (real_uid == exim_uid)
1435 #ifdef CONFIGURE_OWNER
1436 || (real_uid == config_uid)
1440 debug_printf("macros_trusted rejecting macros for uid %d\n", (int) real_uid);
1444 /* Get a list of macros which are whitelisted */
1445 whitelisted = string_copy_perm(US WHITELIST_D_MACROS, FALSE);
1446 prev_char_item = FALSE;
1448 for (p = whitelisted; *p != '\0'; ++p)
1450 if (*p == ':' || isspace(*p))
1455 prev_char_item = FALSE;
1458 if (!prev_char_item)
1459 prev_char_item = TRUE;
1466 whites = store_malloc(sizeof(uschar *) * (white_count+1));
1467 for (p = whitelisted, i = 0; (p != end) && (i < white_count); ++p)
1472 if (i == white_count)
1474 while (*p != '\0' && p < end)
1480 /* The list of commandline macros should be very short.
1481 Accept the N*M complexity. */
1482 for (macro_item * m = macros_user; m; m = m->next) if (m->command_line)
1485 for (uschar ** w = whites; *w; ++w)
1486 if (Ustrcmp(*w, m->name) == 0)
1493 if (!m->replacement)
1495 if ((len = m->replen) == 0)
1497 n = pcre_exec(regex_whitelisted_macro, NULL, CS m->replacement, len,
1498 0, PCRE_EOPT, NULL, 0);
1501 if (n != PCRE_ERROR_NOMATCH)
1502 debug_printf("macros_trusted checking %s returned %d\n", m->name, n);
1506 DEBUG(D_any) debug_printf("macros_trusted overridden to true by whitelisting\n");
1512 /*************************************************
1513 * Expansion testing *
1514 *************************************************/
1516 /* Expand and print one item, doing macro-processing.
1519 item line for expansion
1523 expansion_test_line(uschar * line)
1528 Ustrncpy(big_buffer, line, big_buffer_size);
1529 big_buffer[big_buffer_size-1] = '\0';
1530 len = Ustrlen(big_buffer);
1532 (void) macros_expand(0, &len, &dummy_macexp);
1534 if (isupper(big_buffer[0]))
1536 if (macro_read_assignment(big_buffer))
1537 printf("Defined macro '%s'\n", mlast->name);
1540 if ((line = expand_string(big_buffer))) printf("%s\n", CS line);
1541 else printf("Failed: %s\n", expand_string_message);
1546 /*************************************************
1547 * Entry point and high-level code *
1548 *************************************************/
1550 /* Entry point for the Exim mailer. Analyse the arguments and arrange to take
1551 the appropriate action. All the necessary functions are present in the one
1552 binary. I originally thought one should split it up, but it turns out that so
1553 much of the apparatus is needed in each chunk that one might as well just have
1554 it all available all the time, which then makes the coding easier as well.
1557 argc count of entries in argv
1558 argv argument strings, with argv[0] being the program name
1560 Returns: EXIT_SUCCESS if terminated successfully
1561 EXIT_FAILURE otherwise, except when a message has been sent
1562 to the sender, and -oee was given
1566 main(int argc, char **cargv)
1568 uschar **argv = USS cargv;
1569 int arg_receive_timeout = -1;
1570 int arg_smtp_receive_timeout = -1;
1571 int arg_error_handling = error_handling;
1572 int filter_sfd = -1;
1573 int filter_ufd = -1;
1576 int list_queue_option = 0;
1578 int msg_action_arg = -1;
1579 int namelen = (argv[0] == NULL)? 0 : Ustrlen(argv[0]);
1580 int queue_only_reason = 0;
1582 int perl_start_option = 0;
1584 int recipients_arg = argc;
1585 int sender_address_domain = 0;
1586 int test_retry_arg = -1;
1587 int test_rewrite_arg = -1;
1588 gid_t original_egid;
1589 BOOL arg_queue_only = FALSE;
1590 BOOL bi_option = FALSE;
1591 BOOL checking = FALSE;
1592 BOOL count_queue = FALSE;
1593 BOOL expansion_test = FALSE;
1594 BOOL extract_recipients = FALSE;
1595 BOOL flag_G = FALSE;
1596 BOOL flag_n = FALSE;
1597 BOOL forced_delivery = FALSE;
1598 BOOL f_end_dot = FALSE;
1599 BOOL deliver_give_up = FALSE;
1600 BOOL list_queue = FALSE;
1601 BOOL list_options = FALSE;
1602 BOOL list_config = FALSE;
1603 BOOL local_queue_only;
1605 BOOL one_msg_action = FALSE;
1606 BOOL opt_D_used = FALSE;
1607 BOOL queue_only_set = FALSE;
1608 BOOL receiving_message = TRUE;
1609 BOOL sender_ident_set = FALSE;
1610 BOOL session_local_queue_only;
1612 BOOL removed_privilege = FALSE;
1613 BOOL usage_wanted = FALSE;
1614 BOOL verify_address_mode = FALSE;
1615 BOOL verify_as_sender = FALSE;
1616 BOOL version_printed = FALSE;
1617 uschar *alias_arg = NULL;
1618 uschar *called_as = US"";
1619 uschar *cmdline_syslog_name = NULL;
1620 uschar *start_queue_run_id = NULL;
1621 uschar *stop_queue_run_id = NULL;
1622 uschar *expansion_test_message = NULL;
1623 uschar *ftest_domain = NULL;
1624 uschar *ftest_localpart = NULL;
1625 uschar *ftest_prefix = NULL;
1626 uschar *ftest_suffix = NULL;
1627 uschar *log_oneline = NULL;
1628 uschar *malware_test_file = NULL;
1629 uschar *real_sender_address;
1630 uschar *originator_home = US"/";
1635 struct stat statbuf;
1636 pid_t passed_qr_pid = (pid_t)0;
1637 int passed_qr_pipe = -1;
1638 gid_t group_list[EXIM_GROUPLIST_SIZE];
1640 /* For the -bI: flag */
1641 enum commandline_info info_flag = CMDINFO_NONE;
1642 BOOL info_stdout = FALSE;
1644 /* Possible options for -R and -S */
1646 static uschar *rsopts[] = { US"f", US"ff", US"r", US"rf", US"rff" };
1648 /* Need to define this in case we need to change the environment in order
1649 to get rid of a bogus time zone. We have to make it char rather than uschar
1650 because some OS define it in /usr/include/unistd.h. */
1652 extern char **environ;
1654 #ifdef MEASURE_TIMING
1655 (void)gettimeofday(×tamp_startup, NULL);
1658 /* If the Exim user and/or group and/or the configuration file owner/group were
1659 defined by ref:name at build time, we must now find the actual uid/gid values.
1660 This is a feature to make the lives of binary distributors easier. */
1662 #ifdef EXIM_USERNAME
1663 if (route_finduser(US EXIM_USERNAME, &pw, &exim_uid))
1666 exim_fail("exim: refusing to run with uid 0 for \"%s\"\n", EXIM_USERNAME);
1668 /* If ref:name uses a number as the name, route_finduser() returns
1669 TRUE with exim_uid set and pw coerced to NULL. */
1671 exim_gid = pw->pw_gid;
1672 #ifndef EXIM_GROUPNAME
1675 "exim: ref:name should specify a usercode, not a group.\n"
1676 "exim: can't let you get away with it unless you also specify a group.\n");
1680 exim_fail("exim: failed to find uid for user name \"%s\"\n", EXIM_USERNAME);
1683 #ifdef EXIM_GROUPNAME
1684 if (!route_findgroup(US EXIM_GROUPNAME, &exim_gid))
1685 exim_fail("exim: failed to find gid for group name \"%s\"\n", EXIM_GROUPNAME);
1688 #ifdef CONFIGURE_OWNERNAME
1689 if (!route_finduser(US CONFIGURE_OWNERNAME, NULL, &config_uid))
1690 exim_fail("exim: failed to find uid for user name \"%s\"\n",
1691 CONFIGURE_OWNERNAME);
1694 /* We default the system_filter_user to be the Exim run-time user, as a
1695 sane non-root value. */
1696 system_filter_uid = exim_uid;
1698 #ifdef CONFIGURE_GROUPNAME
1699 if (!route_findgroup(US CONFIGURE_GROUPNAME, &config_gid))
1700 exim_fail("exim: failed to find gid for group name \"%s\"\n",
1701 CONFIGURE_GROUPNAME);
1704 /* In the Cygwin environment, some initialization used to need doing.
1705 It was fudged in by means of this macro; now no longer but we'll leave
1706 it in case of others. */
1712 /* Check a field which is patched when we are running Exim within its
1713 testing harness; do a fast initial check, and then the whole thing. */
1715 f.running_in_test_harness =
1716 *running_status == '<' && Ustrcmp(running_status, "<<<testing>>>") == 0;
1717 if (f.running_in_test_harness)
1720 /* The C standard says that the equivalent of setlocale(LC_ALL, "C") is obeyed
1721 at the start of a program; however, it seems that some environments do not
1722 follow this. A "strange" locale can affect the formatting of timestamps, so we
1725 setlocale(LC_ALL, "C");
1727 /* Get the offset between CLOCK_MONOTONIC and wallclock */
1729 #ifdef _POSIX_MONOTONIC_CLOCK
1733 /* Set up the default handler for timing using alarm(). */
1735 os_non_restarting_signal(SIGALRM, sigalrm_handler);
1737 /* Ensure we have a buffer for constructing log entries. Use malloc directly,
1738 because store_malloc writes a log entry on failure. */
1740 if (!(log_buffer = US malloc(LOG_BUFFER_SIZE)))
1741 exim_fail("exim: failed to get store for log buffer\n");
1743 /* Initialize the default log options. */
1745 bits_set(log_selector, log_selector_size, log_default);
1747 /* Set log_stderr to stderr, provided that stderr exists. This gets reset to
1748 NULL when the daemon is run and the file is closed. We have to use this
1749 indirection, because some systems don't allow writing to the variable "stderr".
1752 if (fstat(fileno(stderr), &statbuf) >= 0) log_stderr = stderr;
1754 /* Arrange for the PCRE regex library to use our store functions. Note that
1755 the normal calls are actually macros that add additional arguments for
1756 debugging purposes so we have to assign specially constructed functions here.
1757 The default is to use store in the stacking pool, but this is overridden in the
1758 regex_must_compile() function. */
1760 pcre_malloc = function_store_get;
1761 pcre_free = function_dummy_free;
1763 /* Ensure there is a big buffer for temporary use in several places. It is put
1764 in malloc store so that it can be freed for enlargement if necessary. */
1766 big_buffer = store_malloc(big_buffer_size);
1768 /* Set up the handler for the data request signal, and set the initial
1769 descriptive text. */
1771 process_info = store_get(PROCESS_INFO_SIZE, TRUE); /* tainted */
1772 set_process_info("initializing");
1773 os_restarting_signal(SIGUSR1, usr1_handler);
1775 /* If running in a dockerized environment, the TERM signal is only
1776 delegated to the PID 1 if we request it by setting an signal handler */
1777 if (getpid() == 1) signal(SIGTERM, term_handler);
1779 /* SIGHUP is used to get the daemon to reconfigure. It gets set as appropriate
1780 in the daemon code. For the rest of Exim's uses, we ignore it. */
1782 signal(SIGHUP, SIG_IGN);
1784 /* We don't want to die on pipe errors as the code is written to handle
1785 the write error instead. */
1787 signal(SIGPIPE, SIG_IGN);
1789 /* Under some circumstance on some OS, Exim can get called with SIGCHLD
1790 set to SIG_IGN. This causes subprocesses that complete before the parent
1791 process waits for them not to hang around, so when Exim calls wait(), nothing
1792 is there. The wait() code has been made robust against this, but let's ensure
1793 that SIGCHLD is set to SIG_DFL, because it's tidier to wait and get a process
1794 ending status. We use sigaction rather than plain signal() on those OS where
1795 SA_NOCLDWAIT exists, because we want to be sure it is turned off. (There was a
1796 problem on AIX with this.) */
1800 struct sigaction act;
1801 act.sa_handler = SIG_DFL;
1802 sigemptyset(&(act.sa_mask));
1804 sigaction(SIGCHLD, &act, NULL);
1807 signal(SIGCHLD, SIG_DFL);
1810 /* Save the arguments for use if we re-exec exim as a daemon after receiving
1815 /* Set up the version number. Set up the leading 'E' for the external form of
1816 message ids, set the pointer to the internal form, and initialize it to
1817 indicate no message being processed. */
1820 message_id_option[0] = '-';
1821 message_id_external = message_id_option + 1;
1822 message_id_external[0] = 'E';
1823 message_id = message_id_external + 1;
1826 /* Set the umask to zero so that any files Exim creates using open() are
1827 created with the modes that it specifies. NOTE: Files created with fopen() have
1828 a problem, which was not recognized till rather late (February 2006). With this
1829 umask, such files will be world writeable. (They are all content scanning files
1830 in the spool directory, which isn't world-accessible, so this is not a
1831 disaster, but it's untidy.) I don't want to change this overall setting,
1832 however, because it will interact badly with the open() calls. Instead, there's
1833 now a function called modefopen() that fiddles with the umask while calling
1838 /* Precompile the regular expression for matching a message id. Keep this in
1839 step with the code that generates ids in the accept.c module. We need to do
1840 this here, because the -M options check their arguments for syntactic validity
1841 using mac_ismsgid, which uses this. */
1844 regex_must_compile(US"^(?:[^\\W_]{6}-){2}[^\\W_]{2}$", FALSE, TRUE);
1846 /* Precompile the regular expression that is used for matching an SMTP error
1847 code, possibly extended, at the start of an error message. Note that the
1848 terminating whitespace character is included. */
1851 regex_must_compile(US"^\\d\\d\\d\\s(?:\\d\\.\\d\\d?\\d?\\.\\d\\d?\\d?\\s)?",
1854 #ifdef WHITELIST_D_MACROS
1855 /* Precompile the regular expression used to filter the content of macros
1856 given to -D for permissibility. */
1858 regex_whitelisted_macro =
1859 regex_must_compile(US"^[A-Za-z0-9_/.-]*$", FALSE, TRUE);
1862 for (i = 0; i < REGEX_VARS; i++) regex_vars[i] = NULL;
1864 /* If the program is called as "mailq" treat it as equivalent to "exim -bp";
1865 this seems to be a generally accepted convention, since one finds symbolic
1866 links called "mailq" in standard OS configurations. */
1868 if ((namelen == 5 && Ustrcmp(argv[0], "mailq") == 0) ||
1869 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/mailq", 6) == 0))
1872 receiving_message = FALSE;
1873 called_as = US"-mailq";
1876 /* If the program is called as "rmail" treat it as equivalent to
1877 "exim -i -oee", thus allowing UUCP messages to be input using non-SMTP mode,
1878 i.e. preventing a single dot on a line from terminating the message, and
1879 returning with zero return code, even in cases of error (provided an error
1880 message has been sent). */
1882 if ((namelen == 5 && Ustrcmp(argv[0], "rmail") == 0) ||
1883 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/rmail", 6) == 0))
1886 called_as = US"-rmail";
1887 errors_sender_rc = EXIT_SUCCESS;
1890 /* If the program is called as "rsmtp" treat it as equivalent to "exim -bS";
1891 this is a smail convention. */
1893 if ((namelen == 5 && Ustrcmp(argv[0], "rsmtp") == 0) ||
1894 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/rsmtp", 6) == 0))
1896 smtp_input = smtp_batched_input = TRUE;
1897 called_as = US"-rsmtp";
1900 /* If the program is called as "runq" treat it as equivalent to "exim -q";
1901 this is a smail convention. */
1903 if ((namelen == 4 && Ustrcmp(argv[0], "runq") == 0) ||
1904 (namelen > 4 && Ustrncmp(argv[0] + namelen - 5, "/runq", 5) == 0))
1907 receiving_message = FALSE;
1908 called_as = US"-runq";
1911 /* If the program is called as "newaliases" treat it as equivalent to
1912 "exim -bi"; this is a sendmail convention. */
1914 if ((namelen == 10 && Ustrcmp(argv[0], "newaliases") == 0) ||
1915 (namelen > 10 && Ustrncmp(argv[0] + namelen - 11, "/newaliases", 11) == 0))
1918 receiving_message = FALSE;
1919 called_as = US"-newaliases";
1922 /* Save the original effective uid for a couple of uses later. It should
1923 normally be root, but in some esoteric environments it may not be. */
1925 original_euid = geteuid();
1926 original_egid = getegid();
1928 /* Get the real uid and gid. If the caller is root, force the effective uid/gid
1929 to be the same as the real ones. This makes a difference only if Exim is setuid
1930 (or setgid) to something other than root, which could be the case in some
1931 special configurations. */
1933 real_uid = getuid();
1934 real_gid = getgid();
1936 if (real_uid == root_uid)
1938 if ((rv = setgid(real_gid)))
1939 exim_fail("exim: setgid(%ld) failed: %s\n",
1940 (long int)real_gid, strerror(errno));
1941 if ((rv = setuid(real_uid)))
1942 exim_fail("exim: setuid(%ld) failed: %s\n",
1943 (long int)real_uid, strerror(errno));
1946 /* If neither the original real uid nor the original euid was root, Exim is
1947 running in an unprivileged state. */
1949 unprivileged = (real_uid != root_uid && original_euid != root_uid);
1951 /* Scan the program's arguments. Some can be dealt with right away; others are
1952 simply recorded for checking and handling afterwards. Do a high-level switch
1953 on the second character (the one after '-'), to save some effort. */
1955 for (i = 1; i < argc; i++)
1957 BOOL badarg = FALSE;
1958 uschar * arg = argv[i];
1962 /* An argument not starting with '-' is the start of a recipients list;
1963 break out of the options-scanning loop. */
1971 /* An option consisting of -- terminates the options */
1973 if (Ustrcmp(arg, "--") == 0)
1975 recipients_arg = i + 1;
1979 /* Handle flagged options */
1981 switchchar = arg[1];
1984 /* Make all -ex options synonymous with -oex arguments, since that
1985 is assumed by various callers. Also make -qR options synonymous with -R
1986 options, as that seems to be required as well. Allow for -qqR too, and
1987 the same for -S options. */
1989 if (Ustrncmp(arg+1, "oe", 2) == 0 ||
1990 Ustrncmp(arg+1, "qR", 2) == 0 ||
1991 Ustrncmp(arg+1, "qS", 2) == 0)
1993 switchchar = arg[2];
1996 else if (Ustrncmp(arg+1, "qqR", 3) == 0 || Ustrncmp(arg+1, "qqS", 3) == 0)
1998 switchchar = arg[3];
2000 f.queue_2stage = TRUE;
2003 /* Make -r synonymous with -f, since it is a documented alias */
2005 else if (arg[1] == 'r') switchchar = 'f';
2007 /* Make -ov synonymous with -v */
2009 else if (Ustrcmp(arg, "-ov") == 0)
2015 /* deal with --option_aliases */
2016 else if (switchchar == '-')
2018 if (Ustrcmp(argrest, "help") == 0)
2020 usage_wanted = TRUE;
2023 else if (Ustrcmp(argrest, "version") == 0)
2030 /* High-level switch on active initial letter */
2035 /* sendmail uses -Ac and -Am to control which .cf file is used;
2038 if (!*argrest) { badarg = TRUE; break; }
2041 BOOL ignore = FALSE;
2046 if (*(argrest + 1) == '\0')
2050 if (!ignore) badarg = TRUE;
2054 /* -Btype is a sendmail option for 7bit/8bit setting. Exim is 8-bit clean
2055 so has no need of it. */
2058 if (!*argrest) i++; /* Skip over the type */
2064 receiving_message = FALSE; /* Reset TRUE for -bm, -bS, -bs below */
2068 /* -bd: Run in daemon mode, awaiting SMTP connections.
2069 -bdf: Ditto, but in the foreground.
2072 f.daemon_listen = TRUE;
2073 if (*argrest == 'f') f.background_daemon = FALSE;
2074 else if (*argrest) badarg = TRUE;
2077 /* -be: Run in expansion test mode
2078 -bem: Ditto, but read a message from a file first
2081 expansion_test = checking = TRUE;
2082 if (*argrest == 'm')
2084 if (++i >= argc) { badarg = TRUE; break; }
2085 expansion_test_message = argv[i];
2088 if (*argrest) badarg = TRUE;
2091 /* -bF: Run system filter test */
2093 filter_test |= checking = FTEST_SYSTEM;
2094 if (*argrest) badarg = TRUE;
2095 else if (++i < argc) filter_test_sfile = argv[i];
2096 else exim_fail("exim: file name expected after %s\n", argv[i-1]);
2099 /* -bf: Run user filter test
2100 -bfd: Set domain for filter testing
2101 -bfl: Set local part for filter testing
2102 -bfp: Set prefix for filter testing
2103 -bfs: Set suffix for filter testing
2108 filter_test |= checking = FTEST_USER;
2109 if (++i < argc) filter_test_ufile = argv[i];
2110 else exim_fail("exim: file name expected after %s\n", argv[i-1]);
2115 exim_fail("exim: string expected after %s\n", arg);
2116 if (Ustrcmp(argrest, "d") == 0) ftest_domain = argv[i];
2117 else if (Ustrcmp(argrest, "l") == 0) ftest_localpart = argv[i];
2118 else if (Ustrcmp(argrest, "p") == 0) ftest_prefix = argv[i];
2119 else if (Ustrcmp(argrest, "s") == 0) ftest_suffix = argv[i];
2124 /* -bh: Host checking - an IP address must follow. */
2126 if (!*argrest || Ustrcmp(argrest, "c") == 0)
2128 if (++i >= argc) { badarg = TRUE; break; }
2129 sender_host_address = string_copy_taint(argv[i], TRUE);
2130 host_checking = checking = f.log_testing_mode = TRUE;
2131 f.host_checking_callout = *argrest == 'c';
2132 message_logs = FALSE;
2137 /* -bi: This option is used by sendmail to initialize *the* alias file,
2138 though it has the -oA option to specify a different file. Exim has no
2139 concept of *the* alias file, but since Sun's YP make script calls
2140 sendmail this way, some support must be provided. */
2142 if (!*++argrest) bi_option = TRUE;
2146 /* -bI: provide information, of the type to follow after a colon.
2147 This is an Exim flag. */
2149 if (Ustrlen(argrest) >= 1 && *argrest == ':')
2151 uschar *p = argrest+1;
2152 info_flag = CMDINFO_HELP;
2154 if (strcmpic(p, CUS"sieve") == 0)
2156 info_flag = CMDINFO_SIEVE;
2159 else if (strcmpic(p, CUS"dscp") == 0)
2161 info_flag = CMDINFO_DSCP;
2164 else if (strcmpic(p, CUS"help") == 0)
2170 /* -bm: Accept and deliver message - the default option. Reinstate
2171 receiving_message, which got turned off for all -b options.
2172 -bmalware: test the filename given for malware */
2174 if (!*argrest) receiving_message = TRUE;
2175 else if (Ustrcmp(argrest, "alware") == 0)
2177 if (++i >= argc) { badarg = TRUE; break; }
2179 malware_test_file = argv[i];
2184 /* -bnq: For locally originating messages, do not qualify unqualified
2185 addresses. In the envelope, this causes errors; in header lines they
2188 if (Ustrcmp(argrest, "q") == 0)
2190 f.allow_unqualified_sender = FALSE;
2191 f.allow_unqualified_recipient = FALSE;
2196 /* -bpxx: List the contents of the mail queue, in various forms. If
2197 the option is -bpc, just a queue count is needed. Otherwise, if the
2198 first letter after p is r, then order is random. */
2200 if (*argrest == 'c')
2203 if (*++argrest) badarg = TRUE;
2207 if (*argrest == 'r')
2209 list_queue_option = 8;
2212 else list_queue_option = 0;
2216 /* -bp: List the contents of the mail queue, top-level only */
2220 /* -bpu: List the contents of the mail queue, top-level undelivered */
2222 else if (Ustrcmp(argrest, "u") == 0) list_queue_option += 1;
2224 /* -bpa: List the contents of the mail queue, including all delivered */
2226 else if (Ustrcmp(argrest, "a") == 0) list_queue_option += 2;
2228 /* Unknown after -bp[r] */
2234 /* -bP: List the configuration variables given as the address list.
2235 Force -v, so configuration errors get displayed. */
2238 /* -bP config: we need to setup here, because later,
2239 * when list_options is checked, the config is read already */
2242 else if (argv[i+1] && Ustrcmp(argv[i+1], "config") == 0)
2245 readconf_save_config(version_string);
2249 list_options = TRUE;
2250 debug_selector |= D_v;
2251 debug_file = stderr;
2255 /* -brt: Test retry configuration lookup */
2257 if (Ustrcmp(argrest, "t") == 0)
2260 test_retry_arg = i + 1;
2264 /* -brw: Test rewrite configuration */
2266 else if (Ustrcmp(argrest, "w") == 0)
2269 test_rewrite_arg = i + 1;
2275 /* -bS: Read SMTP commands on standard input, but produce no replies -
2276 all errors are reported by sending messages. */
2279 smtp_input = smtp_batched_input = receiving_message = TRUE;
2283 /* -bs: Read SMTP commands on standard input and produce SMTP replies
2284 on standard output. */
2286 if (!*argrest) smtp_input = receiving_message = TRUE;
2290 /* -bt: address testing mode */
2293 f.address_test_mode = checking = f.log_testing_mode = TRUE;
2297 /* -bv: verify addresses */
2300 verify_address_mode = checking = f.log_testing_mode = TRUE;
2302 /* -bvs: verify sender addresses */
2304 else if (Ustrcmp(argrest, "s") == 0)
2306 verify_address_mode = checking = f.log_testing_mode = TRUE;
2307 verify_as_sender = TRUE;
2312 /* -bV: Print version string and support details */
2316 printf("Exim version %s #%s built %s\n", version_string,
2317 version_cnumber, version_date);
2318 printf("%s\n", CS version_copyright);
2319 version_printed = TRUE;
2320 show_whats_supported(stdout);
2321 f.log_testing_mode = TRUE;
2326 /* -bw: inetd wait mode, accept a listening socket as stdin */
2328 f.inetd_wait_mode = TRUE;
2329 f.background_daemon = FALSE;
2330 f.daemon_listen = TRUE;
2332 if ((inetd_wait_timeout = readconf_readtime(argrest, 0, FALSE)) <= 0)
2333 exim_fail("exim: bad time value %s: abandoned\n", argv[i]);
2344 /* -C: change configuration file list; ignore if it isn't really
2345 a change! Enforce a prefix check if required. */
2349 if (++i < argc) argrest = argv[i]; else { 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,
2359 if ( ( Ustrlen(filename) < len
2360 || Ustrncmp(filename, ALT_CONFIG_PREFIX, len) != 0
2361 || Ustrstr(filename, "/../") != NULL
2363 && (Ustrcmp(filename, "/dev/null") != 0 || real_uid != root_uid)
2365 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 == nelem(trusted_configs))
2428 const uschar *list = argrest;
2430 while (f.trusted_config && (filename = string_nextinlist(&list,
2431 &sep, big_buffer, big_buffer_size)))
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. */
2581 if (++i < argc) argrest = argv[i]; else { badarg = TRUE; break; }
2582 originator_name = string_copy_taint(argrest, TRUE);
2583 f.sender_name_forced = TRUE;
2587 /* -f: Set sender's address - this value is only actually used if Exim is
2588 run by a trusted user, or if untrusted_set_sender is set and matches the
2589 address, except that the null address can always be set by any user. The
2590 test for this happens later, when the value given here is ignored when not
2591 permitted. For an untrusted user, the actual sender is still put in Sender:
2592 if it doesn't match the From: header (unless no_local_from_check is set).
2593 The data can follow the -f or be in the next argument. The -r switch is an
2594 obsolete form of -f but since there appear to be programs out there that
2595 use anything that sendmail has ever supported, better accept it - the
2596 synonymizing is done before the switch above.
2598 At this stage, we must allow domain literal addresses, because we don't
2599 know what the setting of allow_domain_literals is yet. Ditto for trailing
2600 dots and strip_trailing_dot. */
2604 int dummy_start, dummy_end;
2607 if (i+1 < argc) argrest = argv[++i]; else { badarg = TRUE; break; }
2609 *(sender_address = store_get(1, FALSE)) = '\0'; /* Ensure writeable memory */
2612 uschar * temp = argrest + Ustrlen(argrest) - 1;
2613 while (temp >= argrest && isspace(*temp)) temp--;
2614 if (temp >= argrest && *temp == '.') f_end_dot = TRUE;
2615 allow_domain_literals = TRUE;
2616 strip_trailing_dot = TRUE;
2618 allow_utf8_domains = TRUE;
2620 if (!(sender_address = parse_extract_address(argrest, &errmess,
2621 &dummy_start, &dummy_end, &sender_address_domain, TRUE)))
2622 exim_fail("exim: bad -f address \"%s\": %s\n", argrest, errmess);
2624 sender_address = string_copy_taint(sender_address, TRUE);
2626 message_smtputf8 = string_is_utf8(sender_address);
2627 allow_utf8_domains = FALSE;
2629 allow_domain_literals = FALSE;
2630 strip_trailing_dot = FALSE;
2632 f.sender_address_forced = TRUE;
2636 /* -G: sendmail invocation to specify that it's a gateway submission and
2637 sendmail may complain about problems instead of fixing them.
2638 We make it equivalent to an ACL "control = suppress_local_fixups" and do
2639 not at this time complain about problems. */
2645 /* -h: Set the hop count for an incoming message. Exim does not currently
2646 support this; it always computes it by counting the Received: headers.
2647 To put it in will require a change to the spool header file format. */
2651 if (++i < argc) argrest = argv[i]; else { badarg = TRUE; break; }
2652 if (!isdigit(*argrest)) badarg = TRUE;
2656 /* -i: Set flag so dot doesn't end non-SMTP input (same as -oi, seems
2657 not to be documented for sendmail but mailx (at least) uses it) */
2660 if (!*argrest) f.dot_ends = FALSE; else badarg = TRUE;
2664 /* -L: set the identifier used for syslog; equivalent to setting
2665 syslog_processname in the config file, but needs to be an admin option. */
2669 if (++i < argc) argrest = argv[i]; else { badarg = TRUE; break; }
2670 if ((sz = Ustrlen(argrest)) > 32)
2671 exim_fail("exim: the -L syslog name is too long: \"%s\"\n", argrest);
2673 exim_fail("exim: the -L syslog name is too short\n");
2674 cmdline_syslog_name = string_copy_taint(argrest, TRUE);
2678 receiving_message = FALSE;
2680 /* -MC: continue delivery of another message via an existing open
2681 file descriptor. This option is used for an internal call by the
2682 smtp transport when there is a pending message waiting to go to an
2683 address to which it has got a connection. Five subsequent arguments are
2684 required: transport name, host name, IP address, sequence number, and
2685 message_id. Transports may decline to create new processes if the sequence
2686 number gets too big. The channel is stdin. This (-MC) must be the last
2687 argument. There's a subsequent check that the real-uid is privileged.
2689 If we are running in the test harness. delay for a bit, to let the process
2690 that set this one up complete. This makes for repeatability of the logging,
2693 if (Ustrcmp(argrest, "C") == 0)
2695 union sockaddr_46 interface_sock;
2696 EXIM_SOCKLEN_T size = sizeof(interface_sock);
2699 exim_fail("exim: too many or too few arguments after -MC\n");
2701 if (msg_action_arg >= 0)
2702 exim_fail("exim: incompatible arguments\n");
2704 continue_transport = string_copy_taint(argv[++i], TRUE);
2705 continue_hostname = string_copy_taint(argv[++i], TRUE);
2706 continue_host_address = string_copy_taint(argv[++i], TRUE);
2707 continue_sequence = Uatoi(argv[++i]);
2708 msg_action = MSG_DELIVER;
2709 msg_action_arg = ++i;
2710 forced_delivery = TRUE;
2711 queue_run_pid = passed_qr_pid;
2712 queue_run_pipe = passed_qr_pipe;
2714 if (!mac_ismsgid(argv[i]))
2715 exim_fail("exim: malformed message id %s after -MC option\n",
2718 /* Set up $sending_ip_address and $sending_port, unless proxied */
2720 if (!continue_proxy_cipher)
2721 if (getsockname(fileno(stdin), (struct sockaddr *)(&interface_sock),
2723 sending_ip_address = host_ntoa(-1, &interface_sock, NULL,
2726 exim_fail("exim: getsockname() failed after -MC option: %s\n",
2729 testharness_pause_ms(500);
2733 else if (*argrest == 'C' && argrest[1] && !argrest[2])
2737 /* -MCA: set the smtp_authenticated flag; this is useful only when it
2738 precedes -MC (see above). The flag indicates that the host to which
2739 Exim is connected has accepted an AUTH sequence. */
2741 case 'A': f.smtp_authenticated = TRUE; break;
2743 /* -MCD: set the smtp_use_dsn flag; this indicates that the host
2744 that exim is connected to supports the esmtp extension DSN */
2746 case 'D': smtp_peer_options |= OPTION_DSN; break;
2748 /* -MCd: for debug, set a process-purpose string */
2750 case 'd': if (++i < argc)
2751 process_purpose = string_copy_taint(argv[i], TRUE);
2755 /* -MCG: set the queue name, to a non-default value */
2757 case 'G': if (++i < argc) queue_name = string_copy_taint(argv[i], TRUE);
2761 /* -MCK: the peer offered CHUNKING. Must precede -MC */
2763 case 'K': smtp_peer_options |= OPTION_CHUNKING; break;
2765 /* -MCP: set the smtp_use_pipelining flag; this is useful only when
2766 it preceded -MC (see above) */
2768 case 'P': smtp_peer_options |= OPTION_PIPE; break;
2770 /* -MCQ: pass on the pid of the queue-running process that started
2771 this chain of deliveries and the fd of its synchronizing pipe; this
2772 is useful only when it precedes -MC (see above) */
2774 case 'Q': if (++i < argc) passed_qr_pid = (pid_t)(Uatol(argv[i]));
2776 if (++i < argc) passed_qr_pipe = (int)(Uatol(argv[i]));
2780 /* -MCS: set the smtp_use_size flag; this is useful only when it
2781 precedes -MC (see above) */
2783 case 'S': smtp_peer_options |= OPTION_SIZE; break;
2786 /* -MCt: similar to -MCT below but the connection is still open
2787 via a proxy process which handles the TLS context and coding.
2788 Require three arguments for the proxied local address and port,
2789 and the TLS cipher. */
2791 case 't': if (++i < argc)
2792 sending_ip_address = string_copy_taint(argv[i], TRUE);
2795 sending_port = (int)(Uatol(argv[i]));
2798 continue_proxy_cipher = string_copy_taint(argv[i], TRUE);
2802 /* -MCT: set the tls_offered flag; this is useful only when it
2803 precedes -MC (see above). The flag indicates that the host to which
2804 Exim is connected has offered TLS support. */
2806 case 'T': smtp_peer_options |= OPTION_TLS; break;
2809 default: badarg = TRUE; break;
2814 /* -M[x]: various operations on the following list of message ids:
2815 -M deliver the messages, ignoring next retry times and thawing
2816 -Mc deliver the messages, checking next retry times, no thawing
2817 -Mf freeze the messages
2818 -Mg give up on the messages
2819 -Mt thaw the messages
2820 -Mrm remove the messages
2821 In the above cases, this must be the last option. There are also the
2822 following options which are followed by a single message id, and which
2823 act on that message. Some of them use the "recipient" addresses as well.
2824 -Mar add recipient(s)
2825 -Mmad mark all recipients delivered
2826 -Mmd mark recipients(s) delivered
2828 -Mset load a message for use with -be
2830 -Mvc show copy (of whole message, in RFC 2822 format)
2837 msg_action = MSG_DELIVER;
2838 forced_delivery = f.deliver_force_thaw = TRUE;
2840 else if (Ustrcmp(argrest, "ar") == 0)
2842 msg_action = MSG_ADD_RECIPIENT;
2843 one_msg_action = TRUE;
2845 else if (Ustrcmp(argrest, "c") == 0) msg_action = MSG_DELIVER;
2846 else if (Ustrcmp(argrest, "es") == 0)
2848 msg_action = MSG_EDIT_SENDER;
2849 one_msg_action = TRUE;
2851 else if (Ustrcmp(argrest, "f") == 0) msg_action = MSG_FREEZE;
2852 else if (Ustrcmp(argrest, "g") == 0)
2854 msg_action = MSG_DELIVER;
2855 deliver_give_up = TRUE;
2857 else if (Ustrcmp(argrest, "G") == 0)
2859 msg_action = MSG_SETQUEUE;
2860 queue_name_dest = string_copy_taint(argv[++i], TRUE);
2862 else if (Ustrcmp(argrest, "mad") == 0)
2864 msg_action = MSG_MARK_ALL_DELIVERED;
2866 else if (Ustrcmp(argrest, "md") == 0)
2868 msg_action = MSG_MARK_DELIVERED;
2869 one_msg_action = TRUE;
2871 else if (Ustrcmp(argrest, "rm") == 0) msg_action = MSG_REMOVE;
2872 else if (Ustrcmp(argrest, "set") == 0)
2874 msg_action = MSG_LOAD;
2875 one_msg_action = TRUE;
2877 else if (Ustrcmp(argrest, "t") == 0) msg_action = MSG_THAW;
2878 else if (Ustrcmp(argrest, "vb") == 0)
2880 msg_action = MSG_SHOW_BODY;
2881 one_msg_action = TRUE;
2883 else if (Ustrcmp(argrest, "vc") == 0)
2885 msg_action = MSG_SHOW_COPY;
2886 one_msg_action = TRUE;
2888 else if (Ustrcmp(argrest, "vh") == 0)
2890 msg_action = MSG_SHOW_HEADER;
2891 one_msg_action = TRUE;
2893 else if (Ustrcmp(argrest, "vl") == 0)
2895 msg_action = MSG_SHOW_LOG;
2896 one_msg_action = TRUE;
2898 else { badarg = TRUE; break; }
2900 /* All the -Mxx options require at least one message id. */
2902 msg_action_arg = i + 1;
2903 if (msg_action_arg >= argc)
2904 exim_fail("exim: no message ids given after %s option\n", arg);
2906 /* Some require only message ids to follow */
2908 if (!one_msg_action)
2910 for (int j = msg_action_arg; j < argc; j++) if (!mac_ismsgid(argv[j]))
2911 exim_fail("exim: malformed message id %s after %s option\n",
2913 goto END_ARG; /* Remaining args are ids */
2916 /* Others require only one message id, possibly followed by addresses,
2917 which will be handled as normal arguments. */
2921 if (!mac_ismsgid(argv[msg_action_arg]))
2922 exim_fail("exim: malformed message id %s after %s option\n",
2923 argv[msg_action_arg], arg);
2929 /* Some programs seem to call the -om option without the leading o;
2930 for sendmail it askes for "me too". Exim always does this. */
2933 if (*argrest) badarg = TRUE;
2937 /* -N: don't do delivery - a debugging option that stops transports doing
2938 their thing. It implies debugging at the D_v level. */
2943 f.dont_deliver = TRUE;
2944 debug_selector |= D_v;
2945 debug_file = stderr;
2951 /* -n: This means "don't alias" in sendmail, apparently.
2952 For normal invocations, it has no effect.
2953 It may affect some other options. */
2959 /* -O: Just ignore it. In sendmail, apparently -O option=value means set
2960 option to the specified value. This form uses long names. We need to handle
2961 -O option=value and -Ooption=value. */
2966 exim_fail("exim: string expected after -O\n");
2972 /* -oA: Set an argument for the bi command (sendmail's "alternate alias
2975 if (!*(alias_arg = argrest))
2976 if (i+1 < argc) alias_arg = argv[++i];
2977 else exim_fail("exim: string expected after -oA\n");
2980 /* -oB: Set a connection message max value for remote deliveries */
2983 uschar * p = argrest;
2985 if (i+1 < argc && isdigit((argv[i+1][0])))
2989 connection_max_messages = 1;
2996 exim_fail("exim: number expected after -oB\n");
2997 connection_max_messages = Uatoi(p);
3002 /* -odb: background delivery */
3005 if (Ustrcmp(argrest, "b") == 0)
3007 f.synchronous_delivery = FALSE;
3008 arg_queue_only = FALSE;
3009 queue_only_set = TRUE;
3012 /* -odd: testsuite-only: add no inter-process delays */
3014 else if (Ustrcmp(argrest, "d") == 0)
3015 f.testsuite_delays = FALSE;
3017 /* -odf: foreground delivery (smail-compatible option); same effect as
3018 -odi: interactive (synchronous) delivery (sendmail-compatible option)
3021 else if (Ustrcmp(argrest, "f") == 0 || Ustrcmp(argrest, "i") == 0)
3023 f.synchronous_delivery = TRUE;
3024 arg_queue_only = FALSE;
3025 queue_only_set = TRUE;
3028 /* -odq: queue only */
3030 else if (Ustrcmp(argrest, "q") == 0)
3032 f.synchronous_delivery = FALSE;
3033 arg_queue_only = TRUE;
3034 queue_only_set = TRUE;
3037 /* -odqs: queue SMTP only - do local deliveries and remote routing,
3038 but no remote delivery */
3040 else if (Ustrcmp(argrest, "qs") == 0)
3042 f.queue_smtp = TRUE;
3043 arg_queue_only = FALSE;
3044 queue_only_set = TRUE;
3049 /* -oex: Sendmail error flags. As these are also accepted without the
3050 leading -o prefix, for compatibility with vacation and other callers,
3051 they are handled with -e above. */
3053 /* -oi: Set flag so dot doesn't end non-SMTP input (same as -i)
3054 -oitrue: Another sendmail syntax for the same */
3057 if (!*argrest || Ustrcmp(argrest, "true") == 0)
3062 /* -oM*: Set various characteristics for an incoming message; actually
3063 acted on for trusted callers only. */
3068 exim_fail("exim: data expected after -oM%s\n", argrest);
3070 /* -oMa: Set sender host address */
3072 if (Ustrcmp(argrest, "a") == 0)
3073 sender_host_address = string_copy_taint(argv[++i], TRUE);
3075 /* -oMaa: Set authenticator name */
3077 else if (Ustrcmp(argrest, "aa") == 0)
3078 sender_host_authenticated = string_copy_taint(argv[++i], TRUE);
3080 /* -oMas: setting authenticated sender */
3082 else if (Ustrcmp(argrest, "as") == 0)
3083 authenticated_sender = string_copy_taint(argv[++i], TRUE);
3085 /* -oMai: setting authenticated id */
3087 else if (Ustrcmp(argrest, "ai") == 0)
3088 authenticated_id = string_copy_taint(argv[++i], TRUE);
3090 /* -oMi: Set incoming interface address */
3092 else if (Ustrcmp(argrest, "i") == 0)
3093 interface_address = string_copy_taint(argv[++i], TRUE);
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 = string_copy_taint(argv[++i], TRUE);
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 = string_copy_taint(argv[++i], TRUE);
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 = string_copy_taint(argv[++i], TRUE);
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 */
3209 if (i+1 < argc) argrest = argv[++i]; else { badarg = TRUE; break; }
3215 if (received_protocol)
3216 exim_fail("received_protocol is set already\n");
3218 hn = Ustrchr(argrest, ':');
3220 received_protocol = string_copy_taint(argrest, TRUE);
3223 int old_pool = store_pool;
3224 store_pool = POOL_PERM;
3225 received_protocol = string_copyn_taint(argrest, hn - argrest, TRUE);
3226 store_pool = old_pool;
3227 sender_host_name = string_copy_taint(hn + 1, TRUE);
3234 receiving_message = FALSE;
3235 if (queue_interval >= 0)
3236 exim_fail("exim: -q specified more than once\n");
3238 /* -qq...: Do queue runs in a 2-stage manner */
3240 if (*argrest == 'q')
3242 f.queue_2stage = TRUE;
3246 /* -qi...: Do only first (initial) deliveries */
3248 if (*argrest == 'i')
3250 f.queue_run_first_delivery = TRUE;
3254 /* -qf...: Run the queue, forcing deliveries
3255 -qff..: Ditto, forcing thawing as well */
3257 if (*argrest == 'f')
3259 f.queue_run_force = TRUE;
3260 if (*++argrest == 'f')
3262 f.deliver_force_thaw = TRUE;
3267 /* -q[f][f]l...: Run the queue only on local deliveries */
3269 if (*argrest == 'l')
3271 f.queue_run_local = TRUE;
3275 /* -q[f][f][l][G<name>]... Work on the named queue */
3277 if (*argrest == 'G')
3280 for (argrest++, i = 0; argrest[i] && argrest[i] != '/'; ) i++;
3281 queue_name = string_copyn(argrest, i);
3283 if (*argrest == '/') argrest++;
3286 /* -q[f][f][l][G<name>]: Run the queue, optionally forced, optionally local
3287 only, optionally named, optionally starting from a given message id. */
3289 if (!(list_queue || count_queue))
3291 && (i + 1 >= argc || argv[i+1][0] == '-' || mac_ismsgid(argv[i+1])))
3294 if (i+1 < argc && mac_ismsgid(argv[i+1]))
3295 start_queue_run_id = string_copy_taint(argv[++i], TRUE);
3296 if (i+1 < argc && mac_ismsgid(argv[i+1]))
3297 stop_queue_run_id = string_copy_taint(argv[++i], TRUE);
3300 /* -q[f][f][l][G<name>/]<n>: Run the queue at regular intervals, optionally
3301 forced, optionally local only, optionally named. */
3303 else if ((queue_interval = readconf_readtime(*argrest ? argrest : argv[++i],
3305 exim_fail("exim: bad time value %s: abandoned\n", argv[i]);
3309 case 'R': /* Synonymous with -qR... */
3310 receiving_message = FALSE;
3312 /* -Rf: As -R (below) but force all deliveries,
3313 -Rff: Ditto, but also thaw all frozen messages,
3314 -Rr: String is regex
3315 -Rrf: Regex and force
3316 -Rrff: Regex and force and thaw
3318 in all cases provided there are no further characters in this
3322 for (int i = 0; i < nelem(rsopts); i++)
3323 if (Ustrcmp(argrest, rsopts[i]) == 0)
3325 if (i != 2) f.queue_run_force = TRUE;
3326 if (i >= 2) f.deliver_selectstring_regex = TRUE;
3327 if (i == 1 || i == 4) f.deliver_force_thaw = TRUE;
3328 argrest += Ustrlen(rsopts[i]);
3331 /* -R: Set string to match in addresses for forced queue run to
3332 pick out particular messages. */
3335 deliver_selectstring = string_copy_taint(argrest, TRUE);
3336 else if (i+1 < argc)
3337 deliver_selectstring = string_copy_taint(argv[++i], TRUE);
3339 exim_fail("exim: string expected after -R\n");
3343 /* -r: an obsolete synonym for -f (see above) */
3346 /* -S: Like -R but works on sender. */
3348 case 'S': /* Synonymous with -qS... */
3349 receiving_message = FALSE;
3351 /* -Sf: As -S (below) but force all deliveries,
3352 -Sff: Ditto, but also thaw all frozen messages,
3353 -Sr: String is regex
3354 -Srf: Regex and force
3355 -Srff: Regex and force and thaw
3357 in all cases provided there are no further characters in this
3361 for (int i = 0; i < nelem(rsopts); i++)
3362 if (Ustrcmp(argrest, rsopts[i]) == 0)
3364 if (i != 2) f.queue_run_force = TRUE;
3365 if (i >= 2) f.deliver_selectstring_sender_regex = TRUE;
3366 if (i == 1 || i == 4) f.deliver_force_thaw = TRUE;
3367 argrest += Ustrlen(rsopts[i]);
3370 /* -S: Set string to match in addresses for forced queue run to
3371 pick out particular messages. */
3374 deliver_selectstring_sender = string_copy_taint(argrest, TRUE);
3375 else if (i+1 < argc)
3376 deliver_selectstring_sender = string_copy_taint(argv[++i], TRUE);
3378 exim_fail("exim: string expected after -S\n");
3381 /* -Tqt is an option that is exclusively for use by the testing suite.
3382 It is not recognized in other circumstances. It allows for the setting up
3383 of explicit "queue times" so that various warning/retry things can be
3384 tested. Otherwise variability of clock ticks etc. cause problems. */
3387 if (f.running_in_test_harness && Ustrcmp(argrest, "qt") == 0)
3388 fudged_queue_times = string_copy_taint(argv[++i], TRUE);
3393 /* -t: Set flag to extract recipients from body of message. */
3396 if (!*argrest) extract_recipients = TRUE;
3398 /* -ti: Set flag to extract recipients from body of message, and also
3399 specify that dot does not end the message. */
3401 else if (Ustrcmp(argrest, "i") == 0)
3403 extract_recipients = TRUE;
3407 /* -tls-on-connect: don't wait for STARTTLS (for old clients) */
3410 else if (Ustrcmp(argrest, "ls-on-connect") == 0) tls_in.on_connect = TRUE;
3417 /* -U: This means "initial user submission" in sendmail, apparently. The
3418 doc claims that in future sendmail may refuse syntactically invalid
3419 messages instead of fixing them. For the moment, we just ignore it. */
3425 /* -v: verify things - this is a very low-level debugging */
3430 debug_selector |= D_v;
3431 debug_file = stderr;
3437 /* -x: AIX uses this to indicate some fancy 8-bit character stuff:
3439 The -x flag tells the sendmail command that mail from a local
3440 mail program has National Language Support (NLS) extended characters
3441 in the body of the mail item. The sendmail command can send mail with
3442 extended NLS characters across networks that normally corrupts these
3445 As Exim is 8-bit clean, it just ignores this flag. */
3448 if (*argrest) badarg = TRUE;
3451 /* -X: in sendmail: takes one parameter, logfile, and sends debugging
3452 logs to that file. We swallow the parameter and otherwise ignore it. */
3457 exim_fail("exim: string expected after -X\n");
3463 log_oneline = string_copy_taint(argv[i], TRUE);
3465 exim_fail("exim: file name expected after %s\n", argv[i-1]);
3468 /* All other initial characters are errors */
3473 } /* End of high-level switch statement */
3475 /* Failed to recognize the option, or syntax error */
3478 exim_fail("exim abandoned: unknown, malformed, or incomplete "
3479 "option %s\n", arg);
3483 /* If -R or -S have been specified without -q, assume a single queue run. */
3485 if ( (deliver_selectstring || deliver_selectstring_sender)
3486 && queue_interval < 0)
3491 /* If usage_wanted is set we call the usage function - which never returns */
3492 if (usage_wanted) exim_usage(called_as);
3494 /* Arguments have been processed. Check for incompatibilities. */
3496 (smtp_input || extract_recipients || recipients_arg < argc) &&
3497 (f.daemon_listen || queue_interval >= 0 || bi_option ||
3498 test_retry_arg >= 0 || test_rewrite_arg >= 0 ||
3499 filter_test != FTEST_NONE || (msg_action_arg > 0 && !one_msg_action))
3502 msg_action_arg > 0 &&
3503 (f.daemon_listen || queue_interval > 0 || list_options ||
3504 (checking && msg_action != MSG_LOAD) ||
3505 bi_option || test_retry_arg >= 0 || test_rewrite_arg >= 0)
3508 (f.daemon_listen || queue_interval > 0) &&
3509 (sender_address != NULL || list_options || list_queue || checking ||
3513 f.daemon_listen && queue_interval == 0
3516 f.inetd_wait_mode && queue_interval >= 0
3520 (checking || smtp_input || extract_recipients ||
3521 filter_test != FTEST_NONE || bi_option)
3524 verify_address_mode &&
3525 (f.address_test_mode || smtp_input || extract_recipients ||
3526 filter_test != FTEST_NONE || bi_option)
3529 f.address_test_mode && (smtp_input || extract_recipients ||
3530 filter_test != FTEST_NONE || bi_option)
3533 smtp_input && (sender_address != NULL || filter_test != FTEST_NONE ||
3537 deliver_selectstring != NULL && queue_interval < 0
3540 msg_action == MSG_LOAD &&
3541 (!expansion_test || expansion_test_message != NULL)
3544 exim_fail("exim: incompatible command-line options or arguments\n");
3546 /* If debugging is set up, set the file and the file descriptor to pass on to
3547 child processes. It should, of course, be 2 for stderr. Also, force the daemon
3548 to run in the foreground. */
3550 if (debug_selector != 0)
3552 debug_file = stderr;
3553 debug_fd = fileno(debug_file);
3554 f.background_daemon = FALSE;
3555 testharness_pause_ms(100); /* lets caller finish */
3556 if (debug_selector != D_v) /* -v only doesn't show this */
3558 debug_printf("Exim version %s uid=%ld gid=%ld pid=%d D=%x\n",
3559 version_string, (long int)real_uid, (long int)real_gid, (int)getpid(),
3561 if (!version_printed)
3562 show_whats_supported(stderr);
3566 /* When started with root privilege, ensure that the limits on the number of
3567 open files and the number of processes (where that is accessible) are
3568 sufficiently large, or are unset, in case Exim has been called from an
3569 environment where the limits are screwed down. Not all OS have the ability to
3570 change some of these limits. */
3574 DEBUG(D_any) debug_print_ids(US"Exim has no root privilege:");
3580 #ifdef RLIMIT_NOFILE
3581 if (getrlimit(RLIMIT_NOFILE, &rlp) < 0)
3583 log_write(0, LOG_MAIN|LOG_PANIC, "getrlimit(RLIMIT_NOFILE) failed: %s",
3585 rlp.rlim_cur = rlp.rlim_max = 0;
3588 /* I originally chose 1000 as a nice big number that was unlikely to
3589 be exceeded. It turns out that some older OS have a fixed upper limit of
3592 if (rlp.rlim_cur < 1000)
3594 rlp.rlim_cur = rlp.rlim_max = 1000;
3595 if (setrlimit(RLIMIT_NOFILE, &rlp) < 0)
3597 rlp.rlim_cur = rlp.rlim_max = 256;
3598 if (setrlimit(RLIMIT_NOFILE, &rlp) < 0)
3599 log_write(0, LOG_MAIN|LOG_PANIC, "setrlimit(RLIMIT_NOFILE) failed: %s",
3606 if (getrlimit(RLIMIT_NPROC, &rlp) < 0)
3608 log_write(0, LOG_MAIN|LOG_PANIC, "getrlimit(RLIMIT_NPROC) failed: %s",
3610 rlp.rlim_cur = rlp.rlim_max = 0;
3613 #ifdef RLIM_INFINITY
3614 if (rlp.rlim_cur != RLIM_INFINITY && rlp.rlim_cur < 1000)
3616 rlp.rlim_cur = rlp.rlim_max = RLIM_INFINITY;
3618 if (rlp.rlim_cur < 1000)
3620 rlp.rlim_cur = rlp.rlim_max = 1000;
3622 if (setrlimit(RLIMIT_NPROC, &rlp) < 0)
3623 log_write(0, LOG_MAIN|LOG_PANIC, "setrlimit(RLIMIT_NPROC) failed: %s",
3629 /* Exim is normally entered as root (but some special configurations are
3630 possible that don't do this). However, it always spins off sub-processes that
3631 set their uid and gid as required for local delivery. We don't want to pass on
3632 any extra groups that root may belong to, so we want to get rid of them all at
3635 We need to obey setgroups() at this stage, before possibly giving up root
3636 privilege for a changed configuration file, but later on we might need to
3637 check on the additional groups for the admin user privilege - can't do that
3638 till after reading the config, which might specify the exim gid. Therefore,
3639 save the group list here first. */
3641 if ((group_count = getgroups(nelem(group_list), group_list)) < 0)
3642 exim_fail("exim: getgroups() failed: %s\n", strerror(errno));
3644 /* There is a fundamental difference in some BSD systems in the matter of
3645 groups. FreeBSD and BSDI are known to be different; NetBSD and OpenBSD are
3646 known not to be different. On the "different" systems there is a single group
3647 list, and the first entry in it is the current group. On all other versions of
3648 Unix there is a supplementary group list, which is in *addition* to the current
3649 group. Consequently, to get rid of all extraneous groups on a "standard" system
3650 you pass over 0 groups to setgroups(), while on a "different" system you pass
3651 over a single group - the current group, which is always the first group in the
3652 list. Calling setgroups() with zero groups on a "different" system results in
3653 an error return. The following code should cope with both types of system.
3655 Unfortunately, recent MacOS, which should be a FreeBSD, "helpfully" succeeds
3656 the "setgroups() with zero groups" - and changes the egid.
3657 Thanks to that we had to stash the original_egid above, for use below
3658 in the call to exim_setugid().
3660 However, if this process isn't running as root, setgroups() can't be used
3661 since you have to be root to run it, even if throwing away groups.
3662 Except, sigh, for Hurd - where you can.
3663 Not being root here happens only in some unusual configurations. */
3666 #ifndef OS_SETGROUPS_ZERO_DROPS_ALL
3667 && setgroups(0, NULL) != 0
3669 && setgroups(1, group_list) != 0)
3670 exim_fail("exim: setgroups() failed: %s\n", strerror(errno));
3672 /* If the configuration file name has been altered by an argument on the
3673 command line (either a new file name or a macro definition) and the caller is
3674 not root, or if this is a filter testing run, remove any setuid privilege the
3675 program has and run as the underlying user.
3677 The exim user is locked out of this, which severely restricts the use of -C
3680 Otherwise, set the real ids to the effective values (should be root unless run
3681 from inetd, which it can either be root or the exim uid, if one is configured).
3683 There is a private mechanism for bypassing some of this, in order to make it
3684 possible to test lots of configurations automatically, without having either to
3685 recompile each time, or to patch in an actual configuration file name and other
3686 values (such as the path name). If running in the test harness, pretend that
3687 configuration file changes and macro definitions haven't happened. */
3690 (!f.trusted_config || /* Config changed, or */
3691 !macros_trusted(opt_D_used)) && /* impermissible macros and */
3692 real_uid != root_uid && /* Not root, and */
3693 !f.running_in_test_harness /* Not fudged */
3695 expansion_test /* expansion testing */
3697 filter_test != FTEST_NONE) /* Filter testing */
3699 setgroups(group_count, group_list);
3700 exim_setugid(real_uid, real_gid, FALSE,
3701 US"-C, -D, -be or -bf forces real uid");
3702 removed_privilege = TRUE;
3704 /* In the normal case when Exim is called like this, stderr is available
3705 and should be used for any logging information because attempts to write
3706 to the log will usually fail. To arrange this, we unset really_exim. However,
3707 if no stderr is available there is no point - we might as well have a go
3708 at the log (if it fails, syslog will be written).
3710 Note that if the invoker is Exim, the logs remain available. Messing with
3711 this causes unlogged successful deliveries. */
3713 if (log_stderr && real_uid != exim_uid)
3714 f.really_exim = FALSE;
3717 /* Privilege is to be retained for the moment. It may be dropped later,
3718 depending on the job that this Exim process has been asked to do. For now, set
3719 the real uid to the effective so that subsequent re-execs of Exim are done by a
3723 exim_setugid(geteuid(), original_egid, FALSE, US"forcing real = effective");
3725 /* If testing a filter, open the file(s) now, before wasting time doing other
3726 setups and reading the message. */
3728 if (filter_test & FTEST_SYSTEM)
3729 if ((filter_sfd = Uopen(filter_test_sfile, O_RDONLY, 0)) < 0)
3730 exim_fail("exim: failed to open %s: %s\n", filter_test_sfile,
3733 if (filter_test & FTEST_USER)
3734 if ((filter_ufd = Uopen(filter_test_ufile, O_RDONLY, 0)) < 0)
3735 exim_fail("exim: failed to open %s: %s\n", filter_test_ufile,
3738 /* Initialise lookup_list
3739 If debugging, already called above via version reporting.
3740 In either case, we initialise the list of available lookups while running
3741 as root. All dynamically modules are loaded from a directory which is
3742 hard-coded into the binary and is code which, if not a module, would be
3743 part of Exim already. Ability to modify the content of the directory
3744 is equivalent to the ability to modify a setuid binary!
3746 This needs to happen before we read the main configuration. */
3750 if (f.running_in_test_harness) smtputf8_advertise_hosts = NULL;
3753 /* Read the main runtime configuration data; this gives up if there
3754 is a failure. It leaves the configuration file open so that the subsequent
3755 configuration data for delivery can be read if needed.
3757 NOTE: immediately after opening the configuration file we change the working
3758 directory to "/"! Later we change to $spool_directory. We do it there, because
3759 during readconf_main() some expansion takes place already. */
3761 /* Store the initial cwd before we change directories. Can be NULL if the
3762 dir has already been unlinked. */
3763 initial_cwd = os_getcwd(NULL, 0);
3766 -be[m] expansion test -
3767 -b[fF] filter test new
3769 -bmalware malware_test_file new
3771 -brw rewrite test new
3773 -bv[s] address verify -
3775 -bP <option> (except -bP config, which sets list_config)
3777 If any of these options is set, we suppress warnings about configuration
3778 issues (currently about tls_advertise_hosts and keep_environment not being
3782 #ifdef MEASURE_TIMING
3783 struct timeval t0, diff;
3784 (void)gettimeofday(&t0, NULL);
3787 readconf_main(checking || list_options);
3789 #ifdef MEASURE_TIMING
3790 report_time_since(&t0, US"readconf_main (delta)");
3795 /* Now in directory "/" */
3797 if (cleanup_environment() == FALSE)
3798 log_write(0, LOG_PANIC_DIE, "Can't cleanup environment");
3801 /* If an action on specific messages is requested, or if a daemon or queue
3802 runner is being started, we need to know if Exim was called by an admin user.
3803 This is the case if the real user is root or exim, or if the real group is
3804 exim, or if one of the supplementary groups is exim or a group listed in
3805 admin_groups. We don't fail all message actions immediately if not admin_user,
3806 since some actions can be performed by non-admin users. Instead, set admin_user
3807 for later interrogation. */
3809 if (real_uid == root_uid || real_uid == exim_uid || real_gid == exim_gid)
3810 f.admin_user = TRUE;
3812 for (int i = 0; i < group_count && !f.admin_user; i++)
3813 if (group_list[i] == exim_gid)
3814 f.admin_user = TRUE;
3815 else if (admin_groups)
3816 for (int j = 1; j <= (int)admin_groups[0] && !f.admin_user; j++)
3817 if (admin_groups[j] == group_list[i])
3818 f.admin_user = TRUE;
3820 /* Another group of privileged users are the trusted users. These are root,
3821 exim, and any caller matching trusted_users or trusted_groups. Trusted callers
3822 are permitted to specify sender_addresses with -f on the command line, and
3823 other message parameters as well. */
3825 if (real_uid == root_uid || real_uid == exim_uid)
3826 f.trusted_caller = TRUE;
3830 for (int i = 1; i <= (int)trusted_users[0] && !f.trusted_caller; i++)
3831 if (trusted_users[i] == real_uid)
3832 f.trusted_caller = TRUE;
3835 for (int i = 1; i <= (int)trusted_groups[0] && !f.trusted_caller; i++)
3836 if (trusted_groups[i] == real_gid)
3837 f.trusted_caller = TRUE;
3838 else for (int j = 0; j < group_count && !f.trusted_caller; j++)
3839 if (trusted_groups[i] == group_list[j])
3840 f.trusted_caller = TRUE;
3843 /* At this point, we know if the user is privileged and some command-line
3844 options become possibly impermissible, depending upon the configuration file. */
3846 if (checking && commandline_checks_require_admin && !f.admin_user)
3847 exim_fail("exim: those command-line flags are set to require admin\n");
3849 /* Handle the decoding of logging options. */
3851 decode_bits(log_selector, log_selector_size, log_notall,
3852 log_selector_string, log_options, log_options_count, US"log", 0);
3856 debug_printf("configuration file is %s\n", config_main_filename);
3857 debug_printf("log selectors =");
3858 for (int i = 0; i < log_selector_size; i++)
3859 debug_printf(" %08x", log_selector[i]);
3863 /* If domain literals are not allowed, check the sender address that was
3864 supplied with -f. Ditto for a stripped trailing dot. */
3868 if (sender_address[sender_address_domain] == '[' && !allow_domain_literals)
3869 exim_fail("exim: bad -f address \"%s\": domain literals not "
3870 "allowed\n", sender_address);
3871 if (f_end_dot && !strip_trailing_dot)
3872 exim_fail("exim: bad -f address \"%s.\": domain is malformed "
3873 "(trailing dot not allowed)\n", sender_address);
3876 /* See if an admin user overrode our logging. */
3878 if (cmdline_syslog_name)
3881 syslog_processname = cmdline_syslog_name;
3882 log_file_path = string_copy(CUS"syslog");
3885 /* not a panic, non-privileged users should not be able to spam paniclog */
3887 "exim: you lack sufficient privilege to specify syslog process name\n");
3889 /* Paranoia check of maximum lengths of certain strings. There is a check
3890 on the length of the log file path in log.c, which will come into effect
3891 if there are any calls to write the log earlier than this. However, if we
3892 get this far but the string is very long, it is better to stop now than to
3893 carry on and (e.g.) receive a message and then have to collapse. The call to
3894 log_write() from here will cause the ultimate panic collapse if the complete
3895 file name exceeds the buffer length. */
3897 if (Ustrlen(log_file_path) > 200)
3898 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3899 "log_file_path is longer than 200 chars: aborting");
3901 if (Ustrlen(pid_file_path) > 200)
3902 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3903 "pid_file_path is longer than 200 chars: aborting");
3905 if (Ustrlen(spool_directory) > 200)
3906 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3907 "spool_directory is longer than 200 chars: aborting");
3909 /* Length check on the process name given to syslog for its TAG field,
3910 which is only permitted to be 32 characters or less. See RFC 3164. */
3912 if (Ustrlen(syslog_processname) > 32)
3913 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3914 "syslog_processname is longer than 32 chars: aborting");
3919 log_write(0, LOG_MAIN, "%s", log_oneline);
3920 return EXIT_SUCCESS;
3923 return EXIT_FAILURE;
3925 /* In some operating systems, the environment variable TMPDIR controls where
3926 temporary files are created; Exim doesn't use these (apart from when delivering
3927 to MBX mailboxes), but called libraries such as DBM libraries may require them.
3928 If TMPDIR is found in the environment, reset it to the value defined in the
3929 EXIM_TMPDIR macro, if this macro is defined. For backward compatibility this
3930 macro may be called TMPDIR in old "Local/Makefile"s. It's converted to
3931 EXIM_TMPDIR by the build scripts.
3935 if (environ) for (uschar ** p = USS environ; *p; p++)
3936 if (Ustrncmp(*p, "TMPDIR=", 7) == 0 && Ustrcmp(*p+7, EXIM_TMPDIR) != 0)
3938 uschar * newp = store_malloc(Ustrlen(EXIM_TMPDIR) + 8);
3939 sprintf(CS newp, "TMPDIR=%s", EXIM_TMPDIR);
3941 DEBUG(D_any) debug_printf("reset TMPDIR=%s in environment\n", EXIM_TMPDIR);
3945 /* Timezone handling. If timezone_string is "utc", set a flag to cause all
3946 timestamps to be in UTC (gmtime() is used instead of localtime()). Otherwise,
3947 we may need to get rid of a bogus timezone setting. This can arise when Exim is
3948 called by a user who has set the TZ variable. This then affects the timestamps
3949 in log files and in Received: headers, and any created Date: header lines. The
3950 required timezone is settable in the configuration file, so nothing can be done
3951 about this earlier - but hopefully nothing will normally be logged earlier than
3952 this. We have to make a new environment if TZ is wrong, but don't bother if
3953 timestamps_utc is set, because then all times are in UTC anyway. */
3955 if (timezone_string && strcmpic(timezone_string, US"UTC") == 0)
3956 f.timestamps_utc = TRUE;
3959 uschar *envtz = US getenv("TZ");
3961 ? !timezone_string || Ustrcmp(timezone_string, envtz) != 0
3962 : timezone_string != NULL
3965 uschar **p = USS environ;
3969 if (environ) while (*p++) count++;
3970 if (!envtz) count++;
3971 newp = new = store_malloc(sizeof(uschar *) * (count + 1));
3972 if (environ) for (p = USS environ; *p; p++)
3973 if (Ustrncmp(*p, "TZ=", 3) != 0) *newp++ = *p;
3974 if (timezone_string)
3976 *newp = store_malloc(Ustrlen(timezone_string) + 4);
3977 sprintf(CS *newp++, "TZ=%s", timezone_string);
3982 DEBUG(D_any) debug_printf("Reset TZ to %s: time is %s\n", timezone_string,
3983 tod_stamp(tod_log));
3987 /* Handle the case when we have removed the setuid privilege because of -C or
3988 -D. This means that the caller of Exim was not root.
3990 There is a problem if we were running as the Exim user. The sysadmin may
3991 expect this case to retain privilege because "the binary was called by the
3992 Exim user", but it hasn't, because either the -D option set macros, or the
3993 -C option set a non-trusted configuration file. There are two possibilities:
3995 (1) If deliver_drop_privilege is set, Exim is not going to re-exec in order
3996 to do message deliveries. Thus, the fact that it is running as a
3997 non-privileged user is plausible, and might be wanted in some special
3998 configurations. However, really_exim will have been set false when
3999 privilege was dropped, to stop Exim trying to write to its normal log
4000 files. Therefore, re-enable normal log processing, assuming the sysadmin
4001 has set up the log directory correctly.
4003 (2) If deliver_drop_privilege is not set, the configuration won't work as
4004 apparently intended, and so we log a panic message. In order to retain
4005 root for -C or -D, the caller must either be root or be invoking a
4006 trusted configuration file (when deliver_drop_privilege is false). */
4008 if ( removed_privilege
4009 && (!f.trusted_config || opt_D_used)
4010 && real_uid == exim_uid)
4011 if (deliver_drop_privilege)
4012 f.really_exim = TRUE; /* let logging work normally */
4014 log_write(0, LOG_MAIN|LOG_PANIC,
4015 "exim user lost privilege for using %s option",
4016 f.trusted_config? "-D" : "-C");
4018 /* Start up Perl interpreter if Perl support is configured and there is a
4019 perl_startup option, and the configuration or the command line specifies
4020 initializing starting. Note that the global variables are actually called
4021 opt_perl_xxx to avoid clashing with perl's namespace (perl_*). */
4024 if (perl_start_option != 0)
4025 opt_perl_at_start = (perl_start_option > 0);
4026 if (opt_perl_at_start && opt_perl_startup != NULL)
4029 DEBUG(D_any) debug_printf("Starting Perl interpreter\n");
4030 if ((errstr = init_perl(opt_perl_startup)))
4031 exim_fail("exim: error in perl_startup code: %s\n", errstr);
4032 opt_perl_started = TRUE;
4034 #endif /* EXIM_PERL */
4036 /* Log the arguments of the call if the configuration file said so. This is
4037 a debugging feature for finding out what arguments certain MUAs actually use.
4038 Don't attempt it if logging is disabled, or if listing variables or if
4039 verifying/testing addresses or expansions. */
4041 if ( (debug_selector & D_any || LOGGING(arguments))
4042 && f.really_exim && !list_options && !checking)
4044 uschar *p = big_buffer;
4045 Ustrcpy(p, US"cwd= (failed)");
4051 Ustrncpy(p + 4, initial_cwd, big_buffer_size-5);
4052 p += 4 + Ustrlen(initial_cwd);
4053 /* in case p is near the end and we don't provide enough space for
4054 * string_format to be willing to write. */
4058 (void)string_format(p, big_buffer_size - (p - big_buffer), " %d args:", argc);
4060 for (int i = 0; i < argc; i++)
4062 int len = Ustrlen(argv[i]);
4063 const uschar *printing;
4065 if (p + len + 8 >= big_buffer + big_buffer_size)
4067 Ustrcpy(p, US" ...");
4068 log_write(0, LOG_MAIN, "%s", big_buffer);
4069 Ustrcpy(big_buffer, US"...");
4072 printing = string_printing(argv[i]);
4073 if (!*printing) quote = US"\"";
4076 const uschar *pp = printing;
4078 while (*pp) if (isspace(*pp++)) { quote = US"\""; break; }
4080 p += sprintf(CS p, " %s%.*s%s", quote, (int)(big_buffer_size -
4081 (p - big_buffer) - 4), printing, quote);
4084 if (LOGGING(arguments))
4085 log_write(0, LOG_MAIN, "%s", big_buffer);
4087 debug_printf("%s\n", big_buffer);
4090 /* Set the working directory to be the top-level spool directory. We don't rely
4091 on this in the code, which always uses fully qualified names, but it's useful
4092 for core dumps etc. Don't complain if it fails - the spool directory might not
4093 be generally accessible and calls with the -C option (and others) have lost
4094 privilege by now. Before the chdir, we try to ensure that the directory exists.
4097 if (Uchdir(spool_directory) != 0)
4100 (void)directory_make(spool_directory, US"", SPOOL_DIRECTORY_MODE, FALSE);
4101 dummy = /* quieten compiler */ Uchdir(spool_directory);
4102 dummy = dummy; /* yet more compiler quietening, sigh */
4105 /* Handle calls with the -bi option. This is a sendmail option to rebuild *the*
4106 alias file. Exim doesn't have such a concept, but this call is screwed into
4107 Sun's YP makefiles. Handle this by calling a configured script, as the real
4108 user who called Exim. The -oA option can be used to pass an argument to the
4113 (void)fclose(config_file);
4118 argv[i++] = bi_command;
4119 if (alias_arg) argv[i++] = alias_arg;
4122 setgroups(group_count, group_list);
4123 exim_setugid(real_uid, real_gid, FALSE, US"running bi_command");
4125 DEBUG(D_exec) debug_printf("exec %.256s %.256s\n", argv[0],
4126 argv[1] ? argv[1] : US"");
4128 execv(CS argv[0], (char *const *)argv);
4129 exim_fail("exim: exec failed: %s\n", strerror(errno));
4133 DEBUG(D_any) debug_printf("-bi used but bi_command not set; exiting\n");
4138 /* We moved the admin/trusted check to be immediately after reading the
4139 configuration file. We leave these prints here to ensure that syslog setup,
4140 logfile setup, and so on has already happened. */
4142 if (f.trusted_caller) DEBUG(D_any) debug_printf("trusted user\n");
4143 if (f.admin_user) DEBUG(D_any) debug_printf("admin user\n");
4145 /* Only an admin user may start the daemon or force a queue run in the default
4146 configuration, but the queue run restriction can be relaxed. Only an admin
4147 user may request that a message be returned to its sender forthwith. Only an
4148 admin user may specify a debug level greater than D_v (because it might show
4149 passwords, etc. in lookup queries). Only an admin user may request a queue
4150 count. Only an admin user can use the test interface to scan for email
4151 (because Exim will be in the spool dir and able to look at mails). */
4155 BOOL debugset = (debug_selector & ~D_v) != 0;
4156 if ( deliver_give_up || f.daemon_listen || malware_test_file
4157 || count_queue && queue_list_requires_admin
4158 || list_queue && queue_list_requires_admin
4159 || queue_interval >= 0 && prod_requires_admin
4160 || queue_name_dest && prod_requires_admin
4161 || debugset && !f.running_in_test_harness
4163 exim_fail("exim:%s permission denied\n", debugset? " debugging" : "");
4166 /* If the real user is not root or the exim uid, the argument for passing
4167 in an open TCP/IP connection for another message is not permitted, nor is
4168 running with the -N option for any delivery action, unless this call to exim is
4169 one that supplied an input message, or we are using a patched exim for
4170 regression testing. */
4172 if (real_uid != root_uid && real_uid != exim_uid &&
4173 (continue_hostname != NULL ||
4175 (queue_interval >= 0 || f.daemon_listen || msg_action_arg > 0)
4176 )) && !f.running_in_test_harness)
4177 exim_fail("exim: Permission denied\n");
4179 /* If the caller is not trusted, certain arguments are ignored when running for
4180 real, but are permitted when checking things (-be, -bv, -bt, -bh, -bf, -bF).
4181 Note that authority for performing certain actions on messages is tested in the
4182 queue_action() function. */
4184 if (!f.trusted_caller && !checking)
4186 sender_host_name = sender_host_address = interface_address =
4187 sender_ident = received_protocol = NULL;
4188 sender_host_port = interface_port = 0;
4189 sender_host_authenticated = authenticated_sender = authenticated_id = NULL;
4192 /* If a sender host address is set, extract the optional port number off the
4193 end of it and check its syntax. Do the same thing for the interface address.
4194 Exim exits if the syntax is bad. */
4198 if (sender_host_address != NULL)
4199 sender_host_port = check_port(sender_host_address);
4200 if (interface_address != NULL)
4201 interface_port = check_port(interface_address);
4204 /* If the caller is trusted, then they can use -G to suppress_local_fixups. */
4207 if (f.trusted_caller)
4209 f.suppress_local_fixups = f.suppress_local_fixups_default = TRUE;
4210 DEBUG(D_acl) debug_printf("suppress_local_fixups forced on by -G\n");
4213 exim_fail("exim: permission denied (-G requires a trusted user)\n");
4216 /* If an SMTP message is being received check to see if the standard input is a
4217 TCP/IP socket. If it is, we assume that Exim was called from inetd if the
4218 caller is root or the Exim user, or if the port is a privileged one. Otherwise,
4223 union sockaddr_46 inetd_sock;
4224 EXIM_SOCKLEN_T size = sizeof(inetd_sock);
4225 if (getpeername(0, (struct sockaddr *)(&inetd_sock), &size) == 0)
4227 int family = ((struct sockaddr *)(&inetd_sock))->sa_family;
4228 if (family == AF_INET || family == AF_INET6)
4230 union sockaddr_46 interface_sock;
4231 size = sizeof(interface_sock);
4233 if (getsockname(0, (struct sockaddr *)(&interface_sock), &size) == 0)
4234 interface_address = host_ntoa(-1, &interface_sock, NULL,
4237 if (host_is_tls_on_connect_port(interface_port)) tls_in.on_connect = TRUE;
4239 if (real_uid == root_uid || real_uid == exim_uid || interface_port < 1024)
4242 sender_host_address = host_ntoa(-1, (struct sockaddr *)(&inetd_sock),
4243 NULL, &sender_host_port);
4244 if (mua_wrapper) log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Input from "
4245 "inetd is not supported when mua_wrapper is set");
4249 "exim: Permission denied (unprivileged user, unprivileged port)\n");
4254 /* If the load average is going to be needed while receiving a message, get it
4255 now for those OS that require the first call to os_getloadavg() to be done as
4256 root. There will be further calls later for each message received. */
4258 #ifdef LOAD_AVG_NEEDS_ROOT
4259 if ( receiving_message
4260 && (queue_only_load >= 0 || (f.is_inetd && smtp_load_reserve >= 0)))
4261 load_average = OS_GETLOADAVG();
4264 /* The queue_only configuration option can be overridden by -odx on the command
4265 line, except that if queue_only_override is false, queue_only cannot be unset
4266 from the command line. */
4268 if (queue_only_set && (queue_only_override || arg_queue_only))
4269 queue_only = arg_queue_only;
4271 /* The receive_timeout and smtp_receive_timeout options can be overridden by
4274 if (arg_receive_timeout >= 0) receive_timeout = arg_receive_timeout;
4275 if (arg_smtp_receive_timeout >= 0)
4276 smtp_receive_timeout = arg_smtp_receive_timeout;
4278 /* If Exim was started with root privilege, unless we have already removed the
4279 root privilege above as a result of -C, -D, -be, -bf or -bF, remove it now
4280 except when starting the daemon or doing some kind of delivery or address
4281 testing (-bt). These are the only cases when root need to be retained. We run
4282 as exim for -bv and -bh. However, if deliver_drop_privilege is set, root is
4283 retained only for starting the daemon. We always do the initgroups() in this
4284 situation (controlled by the TRUE below), in order to be as close as possible
4285 to the state Exim usually runs in. */
4287 if (!unprivileged && /* originally had root AND */
4288 !removed_privilege && /* still got root AND */
4289 !f.daemon_listen && /* not starting the daemon */
4290 queue_interval <= 0 && /* (either kind of daemon) */
4292 deliver_drop_privilege || /* requested unprivileged */
4294 queue_interval < 0 && /* not running the queue */
4295 (msg_action_arg < 0 || /* and */
4296 msg_action != MSG_DELIVER) && /* not delivering and */
4297 (!checking || !f.address_test_mode) /* not address checking */
4299 exim_setugid(exim_uid, exim_gid, TRUE, US"privilege not needed");
4301 /* When we are retaining a privileged uid, we still change to the exim gid. */
4306 DEBUG(D_any) debug_printf("dropping to exim gid; retaining priv uid\n");
4307 rv = setgid(exim_gid);
4308 /* Impact of failure is that some stuff might end up with an incorrect group.
4309 We track this for failures from root, since any attempt to change privilege
4310 by root should succeed and failures should be examined. For non-root,
4311 there's no security risk. For me, it's { exim -bV } on a just-built binary,
4312 no need to complain then. */
4314 if (!(unprivileged || removed_privilege))
4315 exim_fail("exim: changing group failed: %s\n", strerror(errno));
4317 DEBUG(D_any) debug_printf("changing group to %ld failed: %s\n",
4318 (long int)exim_gid, strerror(errno));
4321 /* Handle a request to scan a file for malware */
4322 if (malware_test_file)
4324 #ifdef WITH_CONTENT_SCAN
4326 set_process_info("scanning file for malware");
4327 result = malware_in_file(malware_test_file);
4330 printf("No malware found.\n");
4335 printf("Malware lookup returned non-okay/fail: %d\n", result);
4339 printf("Malware found: %s\n", malware_name);
4341 printf("Malware scan detected malware of unknown name.\n");
4343 printf("Malware scanning not enabled at compile time.\n");
4348 /* Handle a request to list the delivery queue */
4352 set_process_info("listing the queue");
4353 queue_list(list_queue_option, argv + recipients_arg, argc - recipients_arg);
4357 /* Handle a request to count the delivery queue */
4361 set_process_info("counting the queue");
4362 fprintf(stdout, "%u\n", queue_count());
4366 /* Handle actions on specific messages, except for the force delivery and
4367 message load actions, which are done below. Some actions take a whole list of
4368 message ids, which are known to continue up to the end of the arguments. Others
4369 take a single message id and then operate on the recipients list. */
4371 if (msg_action_arg > 0 && msg_action != MSG_DELIVER && msg_action != MSG_LOAD)
4373 int yield = EXIT_SUCCESS;
4374 set_process_info("acting on specified messages");
4376 /* ACL definitions may be needed when removing a message (-Mrm) because
4377 event_action gets expanded */
4379 if (msg_action == MSG_REMOVE)
4382 if (!one_msg_action)
4384 for (i = msg_action_arg; i < argc; i++)
4385 if (!queue_action(argv[i], msg_action, NULL, 0, 0))
4386 yield = EXIT_FAILURE;
4389 case MSG_REMOVE: case MSG_FREEZE: case MSG_THAW: break;
4390 default: printf("\n"); break;
4394 else if (!queue_action(argv[msg_action_arg], msg_action, argv, argc,
4395 recipients_arg)) yield = EXIT_FAILURE;
4399 /* We used to set up here to skip reading the ACL section, on
4400 (msg_action_arg > 0 || (queue_interval == 0 && !f.daemon_listen)
4401 Now, since the intro of the ${acl } expansion, ACL definitions may be
4402 needed in transports so we lost the optimisation. */
4405 #ifdef MEASURE_TIMING
4406 struct timeval t0, diff;
4407 (void)gettimeofday(&t0, NULL);
4412 #ifdef MEASURE_TIMING
4413 report_time_since(&t0, US"readconf_rest (delta)");
4417 /* Handle the -brt option. This is for checking out retry configurations.
4418 The next three arguments are a domain name or a complete address, and
4419 optionally two error numbers. All it does is to call the function that
4420 scans the retry configuration data. */
4422 if (test_retry_arg >= 0)
4424 retry_config *yield;
4425 int basic_errno = 0;
4429 if (test_retry_arg >= argc)
4431 printf("-brt needs a domain or address argument\n");
4432 exim_exit(EXIT_FAILURE);
4434 s1 = argv[test_retry_arg++];
4437 /* If the first argument contains no @ and no . it might be a local user
4438 or it might be a single-component name. Treat as a domain. */
4440 if (Ustrchr(s1, '@') == NULL && Ustrchr(s1, '.') == NULL)
4442 printf("Warning: \"%s\" contains no '@' and no '.' characters. It is "
4443 "being \ntreated as a one-component domain, not as a local part.\n\n",
4447 /* There may be an optional second domain arg. */
4449 if (test_retry_arg < argc && Ustrchr(argv[test_retry_arg], '.') != NULL)
4450 s2 = argv[test_retry_arg++];
4452 /* The final arg is an error name */
4454 if (test_retry_arg < argc)
4456 uschar *ss = argv[test_retry_arg];
4458 readconf_retry_error(ss, ss + Ustrlen(ss), &basic_errno, &more_errno);
4461 printf("%s\n", CS error);
4462 return EXIT_FAILURE;
4465 /* For the {MAIL,RCPT,DATA}_4xx errors, a value of 255 means "any", and a
4466 code > 100 as an error is for matching codes to the decade. Turn them into
4467 a real error code, off the decade. */
4469 if (basic_errno == ERRNO_MAIL4XX ||
4470 basic_errno == ERRNO_RCPT4XX ||
4471 basic_errno == ERRNO_DATA4XX)
4473 int code = (more_errno >> 8) & 255;
4475 more_errno = (more_errno & 0xffff00ff) | (21 << 8);
4476 else if (code > 100)
4477 more_errno = (more_errno & 0xffff00ff) | ((code - 96) << 8);
4481 if (!(yield = retry_find_config(s1, s2, basic_errno, more_errno)))
4482 printf("No retry information found\n");
4485 more_errno = yield->more_errno;
4486 printf("Retry rule: %s ", yield->pattern);
4488 if (yield->basic_errno == ERRNO_EXIMQUOTA)
4490 printf("quota%s%s ",
4491 (more_errno > 0)? "_" : "",
4492 (more_errno > 0)? readconf_printtime(more_errno) : US"");
4494 else if (yield->basic_errno == ECONNREFUSED)
4496 printf("refused%s%s ",
4497 (more_errno > 0)? "_" : "",
4498 (more_errno == 'M')? "MX" :
4499 (more_errno == 'A')? "A" : "");
4501 else if (yield->basic_errno == ETIMEDOUT)
4504 if ((more_errno & RTEF_CTOUT) != 0) printf("_connect");
4506 if (more_errno != 0) printf("_%s",
4507 (more_errno == 'M')? "MX" : "A");
4510 else if (yield->basic_errno == ERRNO_AUTHFAIL)
4511 printf("auth_failed ");
4514 for (retry_rule * r = yield->rules; r; r = r->next)
4516 printf("%c,%s", r->rule, readconf_printtime(r->timeout)); /* Do not */
4517 printf(",%s", readconf_printtime(r->p1)); /* amalgamate */
4523 printf(",%d.", x/1000);
4537 exim_exit(EXIT_SUCCESS);
4540 /* Handle a request to list one or more configuration options */
4541 /* If -n was set, we suppress some information */
4546 set_process_info("listing variables");
4547 if (recipients_arg >= argc)
4548 fail = !readconf_print(US"all", NULL, flag_n);
4549 else for (i = recipients_arg; i < argc; i++)
4552 (Ustrcmp(argv[i], "router") == 0 ||
4553 Ustrcmp(argv[i], "transport") == 0 ||
4554 Ustrcmp(argv[i], "authenticator") == 0 ||
4555 Ustrcmp(argv[i], "macro") == 0 ||
4556 Ustrcmp(argv[i], "environment") == 0))
4558 fail |= !readconf_print(argv[i+1], argv[i], flag_n);
4562 fail = !readconf_print(argv[i], NULL, flag_n);
4564 exim_exit(fail ? EXIT_FAILURE : EXIT_SUCCESS);
4569 set_process_info("listing config");
4570 exim_exit(readconf_print(US"config", NULL, flag_n)
4571 ? EXIT_SUCCESS : EXIT_FAILURE);
4575 /* Initialise subsystems as required. */
4579 /* Handle a request to deliver one or more messages that are already on the
4580 queue. Values of msg_action other than MSG_DELIVER and MSG_LOAD are dealt with
4581 above. MSG_LOAD is handled with -be (which is the only time it applies) below.
4583 Delivery of specific messages is typically used for a small number when
4584 prodding by hand (when the option forced_delivery will be set) or when
4585 re-execing to regain root privilege. Each message delivery must happen in a
4586 separate process, so we fork a process for each one, and run them sequentially
4587 so that debugging output doesn't get intertwined, and to avoid spawning too
4588 many processes if a long list is given. However, don't fork for the last one;
4589 this saves a process in the common case when Exim is called to deliver just one
4592 if (msg_action_arg > 0 && msg_action != MSG_LOAD)
4594 if (prod_requires_admin && !f.admin_user)
4596 fprintf(stderr, "exim: Permission denied\n");
4597 exim_exit(EXIT_FAILURE);
4599 set_process_info("delivering specified messages");
4600 if (deliver_give_up) forced_delivery = f.deliver_force_thaw = TRUE;
4601 for (i = msg_action_arg; i < argc; i++)
4605 /*XXX This use of argv[i] for msg_id should really be tainted, but doing
4606 that runs into a later copy into the untainted global message_id[] */
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);
4616 fprintf(stderr, "failed to fork delivery process for %s: %s\n", argv[i],
4618 exim_exit(EXIT_FAILURE);
4622 exim_exit(EXIT_SUCCESS);
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);
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);
4813 rewrite_test(argv[test_rewrite_arg]);
4814 exim_exit(EXIT_SUCCESS);
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);
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);
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);
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);
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);
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);
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);
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";
5473 if (error_handling == ERRORS_STDERR)
5475 fprintf(stderr, "exim: bad recipient address \"%s\": %s\n",
5476 string_printing(list[i]), errmess);
5477 exim_exit(EXIT_FAILURE);
5483 eblock.text1 = string_printing(list[i]);
5484 eblock.text2 = errmess;
5486 moan_to_sender(ERRMESS_BADARGADDRESS, &eblock, NULL, stdin, TRUE)?
5487 errors_sender_rc : EXIT_FAILURE;
5490 receive_add_recipient(string_copy_taint(recipient, TRUE), -1);
5493 while (*(++s) != 0 && (*s == ',' || isspace(*s)));
5497 /* Show the recipients when debugging */
5501 if (sender_address) debug_printf("Sender: %s\n", sender_address);
5502 if (recipients_list)
5504 debug_printf("Recipients:\n");
5505 for (int i = 0; i < recipients_count; i++)
5506 debug_printf(" %s\n", recipients_list[i].address);
5510 /* Run the acl_not_smtp_start ACL if required. The result of the ACL is
5511 ignored; rejecting here would just add complication, and it can just as
5512 well be done later. Allow $recipients to be visible in the ACL. */
5514 if (acl_not_smtp_start)
5516 uschar *user_msg, *log_msg;
5517 f.enable_dollar_recipients = TRUE;
5518 (void)acl_check(ACL_WHERE_NOTSMTP_START, NULL, acl_not_smtp_start,
5519 &user_msg, &log_msg);
5520 f.enable_dollar_recipients = FALSE;
5523 /* Pause for a while waiting for input. If none received in that time,
5524 close the logfile, if we had one open; then if we wait for a long-running
5525 datasource (months, in one use-case) log rotation will not leave us holding
5528 if (!receive_timeout)
5530 struct timeval t = { .tv_sec = 30*60, .tv_usec = 0 }; /* 30 minutes */
5533 FD_ZERO(&r); FD_SET(0, &r);
5534 if (select(1, &r, NULL, NULL, &t) == 0) mainlog_close();
5537 /* Read the data for the message. If filter_test is not FTEST_NONE, this
5538 will just read the headers for the message, and not write anything onto the
5541 message_ended = END_NOTENDED;
5542 more = receive_msg(extract_recipients);
5544 /* more is always FALSE here (not SMTP message) when reading a message
5545 for real; when reading the headers of a message for filter testing,
5546 it is TRUE if the headers were terminated by '.' and FALSE otherwise. */
5548 if (message_id[0] == 0) exim_exit(EXIT_FAILURE);
5549 } /* Non-SMTP message reception */
5551 /* If this is a filter testing run, there are headers in store, but
5552 no message on the spool. Run the filtering code in testing mode, setting
5553 the domain to the qualify domain and the local part to the current user,
5554 unless they have been set by options. The prefix and suffix are left unset
5555 unless specified. The the return path is set to to the sender unless it has
5556 already been set from a return-path header in the message. */
5558 if (filter_test != FTEST_NONE)
5560 deliver_domain = (ftest_domain != NULL)?
5561 ftest_domain : qualify_domain_recipient;
5562 deliver_domain_orig = deliver_domain;
5563 deliver_localpart = (ftest_localpart != NULL)?
5564 ftest_localpart : originator_login;
5565 deliver_localpart_orig = deliver_localpart;
5566 deliver_localpart_prefix = ftest_prefix;
5567 deliver_localpart_suffix = ftest_suffix;
5568 deliver_home = originator_home;
5570 if (return_path == NULL)
5572 printf("Return-path copied from sender\n");
5573 return_path = string_copy(sender_address);
5576 printf("Return-path = %s\n", (return_path[0] == 0)? US"<>" : return_path);
5577 printf("Sender = %s\n", (sender_address[0] == 0)? US"<>" : sender_address);
5579 receive_add_recipient(
5580 string_sprintf("%s%s%s@%s",
5581 (ftest_prefix == NULL)? US"" : ftest_prefix,
5583 (ftest_suffix == NULL)? US"" : ftest_suffix,
5584 deliver_domain), -1);
5586 printf("Recipient = %s\n", recipients_list[0].address);
5587 if (ftest_prefix != NULL) printf("Prefix = %s\n", ftest_prefix);
5588 if (ftest_suffix != NULL) printf("Suffix = %s\n", ftest_suffix);
5590 if (chdir("/")) /* Get away from wherever the user is running this from */
5592 DEBUG(D_receive) debug_printf("chdir(\"/\") failed\n");
5593 exim_exit(EXIT_FAILURE);
5596 /* Now we run either a system filter test, or a user filter test, or both.
5597 In the latter case, headers added by the system filter will persist and be
5598 available to the user filter. We need to copy the filter variables
5601 if ((filter_test & FTEST_SYSTEM) != 0)
5602 if (!filter_runtest(filter_sfd, filter_test_sfile, TRUE, more))
5603 exim_exit(EXIT_FAILURE);
5605 memcpy(filter_sn, filter_n, sizeof(filter_sn));
5607 if ((filter_test & FTEST_USER) != 0)
5608 if (!filter_runtest(filter_ufd, filter_test_ufile, FALSE, more))
5609 exim_exit(EXIT_FAILURE);
5611 exim_exit(EXIT_SUCCESS);
5614 /* Else act on the result of message reception. We should not get here unless
5615 message_id[0] is non-zero. If queue_only is set, session_local_queue_only
5616 will be TRUE. If it is not, check on the number of messages received in this
5619 if (!session_local_queue_only &&
5620 smtp_accept_queue_per_connection > 0 &&
5621 receive_messagecount > smtp_accept_queue_per_connection)
5623 session_local_queue_only = TRUE;
5624 queue_only_reason = 2;
5627 /* Initialize local_queue_only from session_local_queue_only. If it is false,
5628 and queue_only_load is set, check that the load average is below it. If it is
5629 not, set local_queue_only TRUE. If queue_only_load_latch is true (the
5630 default), we put the whole session into queue_only mode. It then remains this
5631 way for any subsequent messages on the same SMTP connection. This is a
5632 deliberate choice; even though the load average may fall, it doesn't seem
5633 right to deliver later messages on the same call when not delivering earlier
5634 ones. However, there are odd cases where this is not wanted, so this can be
5635 changed by setting queue_only_load_latch false. */
5637 local_queue_only = session_local_queue_only;
5638 if (!local_queue_only && queue_only_load >= 0)
5640 local_queue_only = (load_average = OS_GETLOADAVG()) > queue_only_load;
5641 if (local_queue_only)
5643 queue_only_reason = 3;
5644 if (queue_only_load_latch) session_local_queue_only = TRUE;
5648 /* If running as an MUA wrapper, all queueing options and freezing options
5652 local_queue_only = f.queue_only_policy = f.deliver_freeze = FALSE;
5654 /* Log the queueing here, when it will get a message id attached, but
5655 not if queue_only is set (case 0). Case 1 doesn't happen here (too many
5658 if (local_queue_only)
5660 cancel_cutthrough_connection(TRUE, US"no delivery; queueing");
5661 switch(queue_only_reason)
5664 log_write(L_delay_delivery,
5665 LOG_MAIN, "no immediate delivery: more than %d messages "
5666 "received in one connection", smtp_accept_queue_per_connection);
5670 log_write(L_delay_delivery,
5671 LOG_MAIN, "no immediate delivery: load average %.2f",
5672 (double)load_average/1000.0);
5677 else if (f.queue_only_policy || f.deliver_freeze)
5678 cancel_cutthrough_connection(TRUE, US"no delivery; queueing");
5680 /* Else do the delivery unless the ACL or local_scan() called for queue only
5681 or froze the message. Always deliver in a separate process. A fork failure is
5682 not a disaster, as the delivery will eventually happen on a subsequent queue
5683 run. The search cache must be tidied before the fork, as the parent will
5684 do it before exiting. The child will trigger a lookup failure and
5685 thereby defer the delivery if it tries to use (for example) a cached ldap
5686 connection that the parent has called unbind on. */
5693 if ((pid = exim_fork(US"local-accept-delivery")) == 0)
5696 close_unwanted(); /* Close unwanted file descriptors and TLS */
5697 exim_nullstd(); /* Ensure std{in,out,err} exist */
5699 /* Re-exec Exim if we need to regain privilege (note: in mua_wrapper
5700 mode, deliver_drop_privilege is forced TRUE). */
5702 if (geteuid() != root_uid && !deliver_drop_privilege && !unprivileged)
5704 delivery_re_exec(CEE_EXEC_EXIT);
5705 /* Control does not return here. */
5708 /* No need to re-exec */
5710 rc = deliver_message(message_id, FALSE, FALSE);
5712 exim_underbar_exit(!mua_wrapper || rc == DELIVER_MUA_SUCCEEDED
5713 ? EXIT_SUCCESS : EXIT_FAILURE);
5718 cancel_cutthrough_connection(TRUE, US"delivery fork failed");
5719 log_write(0, LOG_MAIN|LOG_PANIC, "failed to fork automatic delivery "
5720 "process: %s", strerror(errno));
5724 release_cutthrough_connection(US"msg passed for delivery");
5726 /* In the parent, wait if synchronous delivery is required. This will
5727 always be the case in MUA wrapper mode. */
5729 if (f.synchronous_delivery)
5732 while (wait(&status) != pid);
5733 if ((status & 0x00ff) != 0)
5734 log_write(0, LOG_MAIN|LOG_PANIC,
5735 "process %d crashed with signal %d while delivering %s",
5736 (int)pid, status & 0x00ff, message_id);
5737 if (mua_wrapper && (status & 0xffff) != 0) exim_exit(EXIT_FAILURE);
5742 /* The loop will repeat if more is TRUE. If we do not know know that the OS
5743 automatically reaps children (see comments above the loop), clear away any
5744 finished subprocesses here, in case there are lots of messages coming in
5745 from the same source. */
5747 #ifndef SIG_IGN_WORKS
5748 while (waitpid(-1, NULL, WNOHANG) > 0);
5752 return_path = sender_address = NULL;
5753 authenticated_sender = NULL;
5754 deliver_localpart_orig = NULL;
5755 deliver_domain_orig = NULL;
5756 deliver_host = deliver_host_address = NULL;
5757 dnslist_domain = dnslist_matched = NULL;
5758 #ifdef WITH_CONTENT_SCAN
5759 malware_name = NULL;
5761 callout_address = NULL;
5762 sending_ip_address = NULL;
5764 for(int i = 0; i < REGEX_VARS; i++) regex_vars[i] = NULL;
5766 store_reset(reset_point);
5769 exim_exit(EXIT_SUCCESS); /* Never returns */
5770 return 0; /* To stop compiler warning */