1 /*************************************************
2 * Exim - an Internet mail transport agent *
3 *************************************************/
5 /* Copyright (c) University of Cambridge 1995 - 2018 */
6 /* See the file NOTICE for conditions of use and distribution. */
9 /* The main function: entry point, initialization, and high-level control.
10 Also a few functions that don't naturally fit elsewhere. */
15 #if defined(__GLIBC__) && !defined(__UCLIBC__)
16 # include <gnu/libc-version.h>
20 # include <gnutls/gnutls.h>
21 # if GNUTLS_VERSION_NUMBER < 0x030103 && !defined(DISABLE_OCSP)
30 extern void init_lookup_list(void);
34 /*************************************************
35 * Function interface to store functions *
36 *************************************************/
38 /* We need some real functions to pass to the PCRE regular expression library
39 for store allocation via Exim's store manager. The normal calls are actually
40 macros that pass over location information to make tracing easier. These
41 functions just interface to the standard macro calls. A good compiler will
42 optimize out the tail recursion and so not make them too expensive. There
43 are two sets of functions; one for use when we want to retain the compiled
44 regular expression for a long time; the other for short-term use. */
47 function_store_get(size_t size)
49 /* For now, regard all RE results as potentially tainted. We might need
50 more intelligence on this point. */
51 return store_get((int)size, TRUE);
55 function_dummy_free(void *block) { block = block; }
58 function_store_malloc(size_t size)
60 return store_malloc((int)size);
64 function_store_free(void *block)
72 /*************************************************
73 * Enums for cmdline interface *
74 *************************************************/
76 enum commandline_info { CMDINFO_NONE=0,
77 CMDINFO_HELP, CMDINFO_SIEVE, CMDINFO_DSCP };
82 /*************************************************
83 * Compile regular expression and panic on fail *
84 *************************************************/
86 /* This function is called when failure to compile a regular expression leads
87 to a panic exit. In other cases, pcre_compile() is called directly. In many
88 cases where this function is used, the results of the compilation are to be
89 placed in long-lived store, so we temporarily reset the store management
90 functions that PCRE uses if the use_malloc flag is set.
93 pattern the pattern to compile
94 caseless TRUE if caseless matching is required
95 use_malloc TRUE if compile into malloc store
97 Returns: pointer to the compiled pattern
101 regex_must_compile(const uschar *pattern, BOOL caseless, BOOL use_malloc)
104 int options = PCRE_COPT;
109 pcre_malloc = function_store_malloc;
110 pcre_free = function_store_free;
112 if (caseless) options |= PCRE_CASELESS;
113 yield = pcre_compile(CCS pattern, options, CCSS &error, &offset, NULL);
114 pcre_malloc = function_store_get;
115 pcre_free = function_dummy_free;
117 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "regular expression error: "
118 "%s at offset %d while compiling %s", error, offset, pattern);
125 /*************************************************
126 * Execute regular expression and set strings *
127 *************************************************/
129 /* This function runs a regular expression match, and sets up the pointers to
130 the matched substrings.
133 re the compiled expression
134 subject the subject string
135 options additional PCRE options
136 setup if < 0 do full setup
137 if >= 0 setup from setup+1 onwards,
138 excluding the full matched string
140 Returns: TRUE or FALSE
144 regex_match_and_setup(const pcre *re, const uschar *subject, int options, int setup)
146 int ovector[3*(EXPAND_MAXN+1)];
147 uschar * s = string_copy(subject); /* de-constifying */
148 int n = pcre_exec(re, NULL, CS s, Ustrlen(s), 0,
149 PCRE_EOPT | options, ovector, nelem(ovector));
151 if (n == 0) n = EXPAND_MAXN + 1;
154 expand_nmax = setup < 0 ? 0 : setup + 1;
155 for (int nn = setup < 0 ? 0 : 2; nn < n*2; nn += 2)
157 expand_nstring[expand_nmax] = s + ovector[nn];
158 expand_nlength[expand_nmax++] = ovector[nn+1] - ovector[nn];
168 /*************************************************
169 * Set up processing details *
170 *************************************************/
172 /* Save a text string for dumping when SIGUSR1 is received.
173 Do checks for overruns.
175 Arguments: format and arguments, as for printf()
180 set_process_info(const char *format, ...)
182 gstring gs = { .size = PROCESS_INFO_SIZE - 2, .ptr = 0, .s = process_info };
187 g = string_fmt_append(&gs, "%5d ", (int)getpid());
189 va_start(ap, format);
190 if (!string_vformat(g, 0, format, ap))
193 g = string_cat(&gs, US"**** string overflowed buffer ****");
195 g = string_catn(g, US"\n", 1);
196 string_from_gstring(g);
197 process_info_len = g->ptr;
198 DEBUG(D_process_info) debug_printf("set_process_info: %s", process_info);
202 /***********************************************
203 * Handler for SIGTERM *
204 ***********************************************/
207 term_handler(int sig)
213 /*************************************************
214 * Handler for SIGUSR1 *
215 *************************************************/
217 /* SIGUSR1 causes any exim process to write to the process log details of
218 what it is currently doing. It will only be used if the OS is capable of
219 setting up a handler that causes automatic restarting of any system call
220 that is in progress at the time.
222 This function takes care to be signal-safe.
224 Argument: the signal number (SIGUSR1)
229 usr1_handler(int sig)
233 os_restarting_signal(sig, usr1_handler);
235 if ((fd = Uopen(process_log_path, O_APPEND|O_WRONLY, LOG_MODE)) < 0)
237 /* If we are already running as the Exim user, try to create it in the
238 current process (assuming spool_directory exists). Otherwise, if we are
239 root, do the creation in an exim:exim subprocess. */
241 int euid = geteuid();
242 if (euid == exim_uid)
243 fd = Uopen(process_log_path, O_CREAT|O_APPEND|O_WRONLY, LOG_MODE);
244 else if (euid == root_uid)
245 fd = log_create_as_exim(process_log_path);
248 /* If we are neither exim nor root, or if we failed to create the log file,
249 give up. There is not much useful we can do with errors, since we don't want
250 to disrupt whatever is going on outside the signal handler. */
254 (void)write(fd, process_info, process_info_len);
260 /*************************************************
262 *************************************************/
264 /* This handler is enabled most of the time that Exim is running. The handler
265 doesn't actually get used unless alarm() has been called to set a timer, to
266 place a time limit on a system call of some kind. When the handler is run, it
269 There are some other SIGALRM handlers that are used in special cases when more
270 than just a flag setting is required; for example, when reading a message's
271 input. These are normally set up in the code module that uses them, and the
272 SIGALRM handler is reset to this one afterwards.
274 Argument: the signal value (SIGALRM)
279 sigalrm_handler(int sig)
281 sig = sig; /* Keep picky compilers happy */
283 os_non_restarting_signal(SIGALRM, sigalrm_handler);
288 /*************************************************
289 * Sleep for a fractional time interval *
290 *************************************************/
292 /* This function is called by millisleep() and exim_wait_tick() to wait for a
293 period of time that may include a fraction of a second. The coding is somewhat
294 tedious. We do not expect setitimer() ever to fail, but if it does, the process
295 will wait for ever, so we panic in this instance. (There was a case of this
296 when a bug in a function that calls milliwait() caused it to pass invalid data.
297 That's when I added the check. :-)
299 We assume it to be not worth sleeping for under 50us; this value will
300 require revisiting as hardware advances. This avoids the issue of
301 a zero-valued timer setting meaning "never fire".
303 Argument: an itimerval structure containing the interval
308 milliwait(struct itimerval *itval)
311 sigset_t old_sigmask;
313 if (itval->it_value.tv_usec < 50 && itval->it_value.tv_sec == 0)
315 (void)sigemptyset(&sigmask); /* Empty mask */
316 (void)sigaddset(&sigmask, SIGALRM); /* Add SIGALRM */
317 (void)sigprocmask(SIG_BLOCK, &sigmask, &old_sigmask); /* Block SIGALRM */
318 if (setitimer(ITIMER_REAL, itval, NULL) < 0) /* Start timer */
319 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
320 "setitimer() failed: %s", strerror(errno));
321 (void)sigfillset(&sigmask); /* All signals */
322 (void)sigdelset(&sigmask, SIGALRM); /* Remove SIGALRM */
323 (void)sigsuspend(&sigmask); /* Until SIGALRM */
324 (void)sigprocmask(SIG_SETMASK, &old_sigmask, NULL); /* Restore mask */
330 /*************************************************
331 * Millisecond sleep function *
332 *************************************************/
334 /* The basic sleep() function has a granularity of 1 second, which is too rough
335 in some cases - for example, when using an increasing delay to slow down
338 Argument: number of millseconds
345 struct itimerval itval;
346 itval.it_interval.tv_sec = 0;
347 itval.it_interval.tv_usec = 0;
348 itval.it_value.tv_sec = msec/1000;
349 itval.it_value.tv_usec = (msec % 1000) * 1000;
355 /*************************************************
356 * Compare microsecond times *
357 *************************************************/
364 Returns: -1, 0, or +1
368 exim_tvcmp(struct timeval *t1, struct timeval *t2)
370 if (t1->tv_sec > t2->tv_sec) return +1;
371 if (t1->tv_sec < t2->tv_sec) return -1;
372 if (t1->tv_usec > t2->tv_usec) return +1;
373 if (t1->tv_usec < t2->tv_usec) return -1;
380 /*************************************************
381 * Clock tick wait function *
382 *************************************************/
384 #ifdef _POSIX_MONOTONIC_CLOCK
385 /* Amount CLOCK_MONOTONIC is behind realtime, at startup. */
386 static struct timespec offset_ts;
389 exim_clock_init(void)
392 if (clock_gettime(CLOCK_MONOTONIC, &offset_ts) != 0) return;
393 (void)gettimeofday(&tv, NULL);
394 offset_ts.tv_sec = tv.tv_sec - offset_ts.tv_sec;
395 offset_ts.tv_nsec = tv.tv_usec * 1000 - offset_ts.tv_nsec;
396 if (offset_ts.tv_nsec >= 0) return;
398 offset_ts.tv_nsec += 1000*1000*1000;
403 /* Exim uses a time + a pid to generate a unique identifier in two places: its
404 message IDs, and in file names for maildir deliveries. Because some OS now
405 re-use pids within the same second, sub-second times are now being used.
406 However, for absolute certainty, we must ensure the clock has ticked before
407 allowing the relevant process to complete. At the time of implementation of
408 this code (February 2003), the speed of processors is such that the clock will
409 invariably have ticked already by the time a process has done its job. This
410 function prepares for the time when things are faster - and it also copes with
411 clocks that go backwards.
414 tgt_tv A timeval which was used to create uniqueness; its usec field
415 has been rounded down to the value of the resolution.
416 We want to be sure the current time is greater than this.
417 resolution The resolution that was used to divide the microseconds
418 (1 for maildir, larger for message ids)
424 exim_wait_tick(struct timeval * tgt_tv, int resolution)
426 struct timeval now_tv;
427 long int now_true_usec;
429 #ifdef _POSIX_MONOTONIC_CLOCK
430 struct timespec now_ts;
432 if (clock_gettime(CLOCK_MONOTONIC, &now_ts) == 0)
434 now_ts.tv_sec += offset_ts.tv_sec;
435 if ((now_ts.tv_nsec += offset_ts.tv_nsec) >= 1000*1000*1000)
438 now_ts.tv_nsec -= 1000*1000*1000;
440 now_tv.tv_sec = now_ts.tv_sec;
441 now_true_usec = (now_ts.tv_nsec / (resolution * 1000)) * resolution;
442 now_tv.tv_usec = now_true_usec;
447 (void)gettimeofday(&now_tv, NULL);
448 now_true_usec = now_tv.tv_usec;
449 now_tv.tv_usec = (now_true_usec/resolution) * resolution;
452 while (exim_tvcmp(&now_tv, tgt_tv) <= 0)
454 struct itimerval itval;
455 itval.it_interval.tv_sec = 0;
456 itval.it_interval.tv_usec = 0;
457 itval.it_value.tv_sec = tgt_tv->tv_sec - now_tv.tv_sec;
458 itval.it_value.tv_usec = tgt_tv->tv_usec + resolution - now_true_usec;
460 /* We know that, overall, "now" is less than or equal to "then". Therefore, a
461 negative value for the microseconds is possible only in the case when "now"
462 is more than a second less than "tgt". That means that itval.it_value.tv_sec
463 is greater than zero. The following correction is therefore safe. */
465 if (itval.it_value.tv_usec < 0)
467 itval.it_value.tv_usec += 1000000;
468 itval.it_value.tv_sec -= 1;
471 DEBUG(D_transport|D_receive)
473 if (!f.running_in_test_harness)
475 debug_printf("tick check: " TIME_T_FMT ".%06lu " TIME_T_FMT ".%06lu\n",
476 tgt_tv->tv_sec, (long) tgt_tv->tv_usec,
477 now_tv.tv_sec, (long) now_tv.tv_usec);
478 debug_printf("waiting " TIME_T_FMT ".%06lu sec\n",
479 itval.it_value.tv_sec, (long) itval.it_value.tv_usec);
485 /* Be prapared to go around if the kernel does not implement subtick
486 granularity (GNU Hurd) */
488 (void)gettimeofday(&now_tv, NULL);
489 now_true_usec = now_tv.tv_usec;
490 now_tv.tv_usec = (now_true_usec/resolution) * resolution;
497 /*************************************************
498 * Call fopen() with umask 777 and adjust mode *
499 *************************************************/
501 /* Exim runs with umask(0) so that files created with open() have the mode that
502 is specified in the open() call. However, there are some files, typically in
503 the spool directory, that are created with fopen(). They end up world-writeable
504 if no precautions are taken. Although the spool directory is not accessible to
505 the world, this is an untidiness. So this is a wrapper function for fopen()
506 that sorts out the mode of the created file.
509 filename the file name
510 options the fopen() options
511 mode the required mode
513 Returns: the fopened FILE or NULL
517 modefopen(const uschar *filename, const char *options, mode_t mode)
519 mode_t saved_umask = umask(0777);
520 FILE *f = Ufopen(filename, options);
521 (void)umask(saved_umask);
522 if (f != NULL) (void)fchmod(fileno(f), mode);
527 /*************************************************
528 * Ensure stdin, stdout, and stderr exist *
529 *************************************************/
531 /* Some operating systems grumble if an exec() happens without a standard
532 input, output, and error (fds 0, 1, 2) being defined. The worry is that some
533 file will be opened and will use these fd values, and then some other bit of
534 code will assume, for example, that it can write error messages to stderr.
535 This function ensures that fds 0, 1, and 2 are open if they do not already
536 exist, by connecting them to /dev/null.
538 This function is also used to ensure that std{in,out,err} exist at all times,
539 so that if any library that Exim calls tries to use them, it doesn't crash.
550 for (int i = 0; i <= 2; i++)
552 if (fstat(i, &statbuf) < 0 && errno == EBADF)
554 if (devnull < 0) devnull = open("/dev/null", O_RDWR);
555 if (devnull < 0) log_write(0, LOG_MAIN|LOG_PANIC_DIE, "%s",
556 string_open_failed(errno, "/dev/null", NULL));
557 if (devnull != i) (void)dup2(devnull, i);
560 if (devnull > 2) (void)close(devnull);
566 /*************************************************
567 * Close unwanted file descriptors for delivery *
568 *************************************************/
570 /* This function is called from a new process that has been forked to deliver
571 an incoming message, either directly, or using exec.
573 We want any smtp input streams to be closed in this new process. However, it
574 has been observed that using fclose() here causes trouble. When reading in -bS
575 input, duplicate copies of messages have been seen. The files will be sharing a
576 file pointer with the parent process, and it seems that fclose() (at least on
577 some systems - I saw this on Solaris 2.5.1) messes with that file pointer, at
578 least sometimes. Hence we go for closing the underlying file descriptors.
580 If TLS is active, we want to shut down the TLS library, but without molesting
581 the parent's SSL connection.
583 For delivery of a non-SMTP message, we want to close stdin and stdout (and
584 stderr unless debugging) because the calling process might have set them up as
585 pipes and be waiting for them to close before it waits for the submission
586 process to terminate. If they aren't closed, they hold up the calling process
587 until the initial delivery process finishes, which is not what we want.
589 Exception: We do want it for synchronous delivery!
591 And notwithstanding all the above, if D_resolver is set, implying resolver
592 debugging, leave stdout open, because that's where the resolver writes its
595 When we close stderr (which implies we've also closed stdout), we also get rid
596 of any controlling terminal.
608 tls_close(NULL, TLS_NO_SHUTDOWN); /* Shut down the TLS library */
610 (void)close(fileno(smtp_in));
611 (void)close(fileno(smtp_out));
616 (void)close(0); /* stdin */
617 if ((debug_selector & D_resolver) == 0) (void)close(1); /* stdout */
618 if (debug_selector == 0) /* stderr */
620 if (!f.synchronous_delivery)
633 /*************************************************
635 *************************************************/
637 /* This function sets a new uid and gid permanently, optionally calling
638 initgroups() to set auxiliary groups. There are some special cases when running
639 Exim in unprivileged modes. In these situations the effective uid will not be
640 root; if we already have the right effective uid/gid, and don't need to
641 initialize any groups, leave things as they are.
646 igflag TRUE if initgroups() wanted
647 msg text to use in debugging output and failure log
649 Returns: nothing; bombs out on failure
653 exim_setugid(uid_t uid, gid_t gid, BOOL igflag, uschar *msg)
655 uid_t euid = geteuid();
656 gid_t egid = getegid();
658 if (euid == root_uid || euid != uid || egid != gid || igflag)
660 /* At least one OS returns +1 for initgroups failure, so just check for
665 struct passwd *pw = getpwuid(uid);
667 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "cannot run initgroups(): "
668 "no passwd entry for uid=%ld", (long int)uid);
670 if (initgroups(pw->pw_name, gid) != 0)
671 log_write(0,LOG_MAIN|LOG_PANIC_DIE,"initgroups failed for uid=%ld: %s",
672 (long int)uid, strerror(errno));
675 if (setgid(gid) < 0 || setuid(uid) < 0)
676 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "unable to set gid=%ld or uid=%ld "
677 "(euid=%ld): %s", (long int)gid, (long int)uid, (long int)euid, msg);
680 /* Debugging output included uid/gid and all groups */
684 int group_count, save_errno;
685 gid_t group_list[EXIM_GROUPLIST_SIZE];
686 debug_printf("changed uid/gid: %s\n uid=%ld gid=%ld pid=%ld\n", msg,
687 (long int)geteuid(), (long int)getegid(), (long int)getpid());
688 group_count = getgroups(nelem(group_list), group_list);
690 debug_printf(" auxiliary group list:");
692 for (int i = 0; i < group_count; i++) debug_printf(" %d", (int)group_list[i]);
693 else if (group_count < 0)
694 debug_printf(" <error: %s>", strerror(save_errno));
695 else debug_printf(" <none>");
703 /*************************************************
705 *************************************************/
707 /* Exim exits via this function so that it always clears up any open
713 Returns: does not return
717 exim_exit(int rc, const uschar * process)
722 debug_printf(">>>>>>>>>>>>>>>> Exim pid=%d %s%s%sterminating with rc=%d "
723 ">>>>>>>>>>>>>>>>\n", (int)getpid(),
724 process ? "(" : "", process, process ? ") " : "", rc);
730 exim_underbar_exit(int rc)
738 /* Print error string, then die */
740 exim_fail(const char * fmt, ...)
744 vfprintf(stderr, fmt, ap);
748 /* exim_chown_failure() called from exim_chown()/exim_fchown() on failure
749 of chown()/fchown(). See src/functions.h for more explanation */
751 exim_chown_failure(int fd, const uschar *name, uid_t owner, gid_t group)
753 int saved_errno = errno; /* from the preceeding chown call */
755 log_write(0, LOG_MAIN|LOG_PANIC,
756 __FILE__ ":%d: chown(%s, %d:%d) failed (%s)."
757 " Please contact the authors and refer to https://bugs.exim.org/show_bug.cgi?id=2391",
758 __LINE__, name?name:US"<unknown>", owner, group, strerror(errno));
760 /* I leave this here, commented, in case the "bug"(?) comes up again.
761 It is not an Exim bug, but we can provide a workaround.
767 if (0 == (fd < 0 ? stat(name, &buf) : fstat(fd, &buf)))
769 if (buf.st_uid == owner && buf.st_gid == group) return 0;
770 log_write(0, LOG_MAIN|LOG_PANIC, "Wrong ownership on %s", name);
772 else log_write(0, LOG_MAIN|LOG_PANIC, "Stat failed on %s: %s", name, strerror(errno));
780 /*************************************************
781 * Extract port from host address *
782 *************************************************/
784 /* Called to extract the port from the values given to -oMa and -oMi.
785 It also checks the syntax of the address, and terminates it before the
786 port data when a port is extracted.
789 address the address, with possible port on the end
791 Returns: the port, or zero if there isn't one
792 bombs out on a syntax error
796 check_port(uschar *address)
798 int port = host_address_extract_port(address);
799 if (string_is_ip_address(address, NULL) == 0)
800 exim_fail("exim abandoned: \"%s\" is not an IP address\n", address);
806 /*************************************************
807 * Test/verify an address *
808 *************************************************/
810 /* This function is called by the -bv and -bt code. It extracts a working
811 address from a full RFC 822 address. This isn't really necessary per se, but it
812 has the effect of collapsing source routes.
816 flags flag bits for verify_address()
817 exit_value to be set for failures
823 test_address(uschar *s, int flags, int *exit_value)
825 int start, end, domain;
826 uschar *parse_error = NULL;
827 uschar *address = parse_extract_address(s, &parse_error, &start, &end, &domain,
831 fprintf(stdout, "syntax error: %s\n", parse_error);
836 int rc = verify_address(deliver_make_addr(address,TRUE), stdout, flags, -1,
837 -1, -1, NULL, NULL, NULL);
838 if (rc == FAIL) *exit_value = 2;
839 else if (rc == DEFER && *exit_value == 0) *exit_value = 1;
845 /*************************************************
846 * Show supported features *
847 *************************************************/
850 show_db_version(FILE * f)
852 #ifdef DB_VERSION_STRING
855 fprintf(f, "Library version: BDB: Compile: %s\n", DB_VERSION_STRING);
856 fprintf(f, " Runtime: %s\n",
857 db_version(NULL, NULL, NULL));
860 fprintf(f, "Berkeley DB: %s\n", DB_VERSION_STRING);
862 #elif defined(BTREEVERSION) && defined(HASHVERSION)
864 fprintf(f, "Probably Berkeley DB version 1.8x (native mode)\n");
866 fprintf(f, "Probably Berkeley DB version 1.8x (compatibility mode)\n");
869 #elif defined(_DBM_RDONLY) || defined(dbm_dirfno)
870 fprintf(f, "Probably ndbm\n");
871 #elif defined(USE_TDB)
872 fprintf(f, "Using tdb\n");
875 fprintf(f, "Probably GDBM (native mode)\n");
877 fprintf(f, "Probably GDBM (compatibility mode)\n");
883 /* This function is called for -bV/--version and for -d to output the optional
884 features of the current Exim binary.
886 Arguments: a FILE for printing
891 show_whats_supported(FILE * fp)
893 DEBUG(D_any) {} else show_db_version(fp);
895 fprintf(fp, "Support for:");
896 #ifdef SUPPORT_CRYPTEQ
897 fprintf(fp, " crypteq");
900 fprintf(fp, " iconv()");
903 fprintf(fp, " IPv6");
905 #ifdef HAVE_SETCLASSRESOURCES
906 fprintf(fp, " use_setclassresources");
912 fprintf(fp, " Perl");
915 fprintf(fp, " Expand_dlfunc");
917 #ifdef USE_TCP_WRAPPERS
918 fprintf(fp, " TCPwrappers");
921 fprintf(fp, " GnuTLS");
924 fprintf(fp, " OpenSSL");
926 #ifdef SUPPORT_TRANSLATE_IP_ADDRESS
927 fprintf(fp, " translate_ip_address");
929 #ifdef SUPPORT_MOVE_FROZEN_MESSAGES
930 fprintf(fp, " move_frozen_messages");
932 #ifdef WITH_CONTENT_SCAN
933 fprintf(fp, " Content_Scanning");
936 fprintf(fp, " DANE");
939 fprintf(fp, " DKIM");
941 #ifndef DISABLE_DNSSEC
942 fprintf(fp, " DNSSEC");
944 #ifndef DISABLE_EVENT
945 fprintf(fp, " Event");
948 fprintf(fp, " I18N");
951 fprintf(fp, " OCSP");
953 #ifndef DISABLE_PIPE_CONNECT
954 fprintf(fp, " PIPE_CONNECT");
957 fprintf(fp, " PRDR");
960 fprintf(fp, " PROXY");
963 fprintf(fp, " SOCKS");
969 fprintf(fp, " DMARC");
973 if (f.tcp_fastopen_ok) fprintf(fp, " TCP_Fast_Open");
975 #ifdef EXPERIMENTAL_ARC
976 fprintf(fp, " Experimental_ARC");
978 #ifdef EXPERIMENTAL_BRIGHTMAIL
979 fprintf(fp, " Experimental_Brightmail");
981 #ifdef EXPERIMENTAL_DCC
982 fprintf(fp, " Experimental_DCC");
984 #ifdef EXPERIMENTAL_DSN_INFO
985 fprintf(fp, " Experimental_DSN_info");
987 #ifdef EXPERIMENTAL_LMDB
988 fprintf(fp, " Experimental_LMDB");
990 #ifdef EXPERIMENTAL_QUEUE_RAMP
991 fprintf(fp, " Experimental_Queue_Ramp");
993 #ifdef EXPERIMENTAL_QUEUEFILE
994 fprintf(fp, " Experimental_QUEUEFILE");
996 #if defined(EXPERIMENTAL_SRS) || defined(EXPERIMENTAL_SRS_NATIVE)
997 fprintf(fp, " Experimental_SRS");
999 #ifdef EXPERIMENTAL_TLS_RESUME
1000 fprintf(fp, " Experimental_TLS_resume");
1004 fprintf(fp, "Lookups (built-in):");
1005 #if defined(LOOKUP_LSEARCH) && LOOKUP_LSEARCH!=2
1006 fprintf(fp, " lsearch wildlsearch nwildlsearch iplsearch");
1008 #if defined(LOOKUP_CDB) && LOOKUP_CDB!=2
1009 fprintf(fp, " cdb");
1011 #if defined(LOOKUP_DBM) && LOOKUP_DBM!=2
1012 fprintf(fp, " dbm dbmjz dbmnz");
1014 #if defined(LOOKUP_DNSDB) && LOOKUP_DNSDB!=2
1015 fprintf(fp, " dnsdb");
1017 #if defined(LOOKUP_DSEARCH) && LOOKUP_DSEARCH!=2
1018 fprintf(fp, " dsearch");
1020 #if defined(LOOKUP_IBASE) && LOOKUP_IBASE!=2
1021 fprintf(fp, " ibase");
1023 #if defined(LOOKUP_JSON) && LOOKUP_JSON!=2
1024 fprintf(fp, " json");
1026 #if defined(LOOKUP_LDAP) && LOOKUP_LDAP!=2
1027 fprintf(fp, " ldap ldapdn ldapm");
1029 #ifdef EXPERIMENTAL_LMDB
1030 fprintf(fp, " lmdb");
1032 #if defined(LOOKUP_MYSQL) && LOOKUP_MYSQL!=2
1033 fprintf(fp, " mysql");
1035 #if defined(LOOKUP_NIS) && LOOKUP_NIS!=2
1036 fprintf(fp, " nis nis0");
1038 #if defined(LOOKUP_NISPLUS) && LOOKUP_NISPLUS!=2
1039 fprintf(fp, " nisplus");
1041 #if defined(LOOKUP_ORACLE) && LOOKUP_ORACLE!=2
1042 fprintf(fp, " oracle");
1044 #if defined(LOOKUP_PASSWD) && LOOKUP_PASSWD!=2
1045 fprintf(fp, " passwd");
1047 #if defined(LOOKUP_PGSQL) && LOOKUP_PGSQL!=2
1048 fprintf(fp, " pgsql");
1050 #if defined(LOOKUP_REDIS) && LOOKUP_REDIS!=2
1051 fprintf(fp, " redis");
1053 #if defined(LOOKUP_SQLITE) && LOOKUP_SQLITE!=2
1054 fprintf(fp, " sqlite");
1056 #if defined(LOOKUP_TESTDB) && LOOKUP_TESTDB!=2
1057 fprintf(fp, " testdb");
1059 #if defined(LOOKUP_WHOSON) && LOOKUP_WHOSON!=2
1060 fprintf(fp, " whoson");
1064 auth_show_supported(fp);
1065 route_show_supported(fp);
1066 transport_show_supported(fp);
1068 #ifdef WITH_CONTENT_SCAN
1069 malware_show_supported(fp);
1072 if (fixed_never_users[0] > 0)
1075 fprintf(fp, "Fixed never_users: ");
1076 for (i = 1; i <= (int)fixed_never_users[0] - 1; i++)
1077 fprintf(fp, "%d:", (unsigned int)fixed_never_users[i]);
1078 fprintf(fp, "%d\n", (unsigned int)fixed_never_users[i]);
1081 fprintf(fp, "Configure owner: %d:%d\n", config_uid, config_gid);
1083 fprintf(fp, "Size of off_t: " SIZE_T_FMT "\n", sizeof(off_t));
1085 /* Everything else is details which are only worth reporting when debugging.
1086 Perhaps the tls_version_report should move into this too. */
1089 /* clang defines __GNUC__ (at least, for me) so test for it first */
1090 #if defined(__clang__)
1091 fprintf(fp, "Compiler: CLang [%s]\n", __clang_version__);
1092 #elif defined(__GNUC__)
1093 fprintf(fp, "Compiler: GCC [%s]\n",
1097 "? unknown version ?"
1101 fprintf(fp, "Compiler: <unknown>\n");
1104 #if defined(__GLIBC__) && !defined(__UCLIBC__)
1105 fprintf(fp, "Library version: Glibc: Compile: %d.%d\n",
1106 __GLIBC__, __GLIBC_MINOR__);
1107 if (__GLIBC_PREREQ(2, 1))
1108 fprintf(fp, " Runtime: %s\n",
1109 gnu_get_libc_version());
1112 show_db_version(fp);
1115 tls_version_report(fp);
1118 utf8_version_report(fp);
1121 spf_lib_version_report(fp);
1124 for (auth_info * authi = auths_available; *authi->driver_name != '\0'; ++authi)
1125 if (authi->version_report)
1126 (*authi->version_report)(fp);
1128 /* PCRE_PRERELEASE is either defined and empty or a bare sequence of
1129 characters; unless it's an ancient version of PCRE in which case it
1131 #ifndef PCRE_PRERELEASE
1132 # define PCRE_PRERELEASE
1135 #define EXPAND_AND_QUOTE(X) QUOTE(X)
1136 fprintf(fp, "Library version: PCRE: Compile: %d.%d%s\n"
1138 PCRE_MAJOR, PCRE_MINOR,
1139 EXPAND_AND_QUOTE(PCRE_PRERELEASE) "",
1142 #undef EXPAND_AND_QUOTE
1145 for (int i = 0; i < lookup_list_count; i++)
1146 if (lookup_list[i]->version_report)
1147 lookup_list[i]->version_report(fp);
1149 #ifdef WHITELIST_D_MACROS
1150 fprintf(fp, "WHITELIST_D_MACROS: \"%s\"\n", WHITELIST_D_MACROS);
1152 fprintf(fp, "WHITELIST_D_MACROS unset\n");
1154 #ifdef TRUSTED_CONFIG_LIST
1155 fprintf(fp, "TRUSTED_CONFIG_LIST: \"%s\"\n", TRUSTED_CONFIG_LIST);
1157 fprintf(fp, "TRUSTED_CONFIG_LIST unset\n");
1164 /*************************************************
1165 * Show auxiliary information about Exim *
1166 *************************************************/
1169 show_exim_information(enum commandline_info request, FILE *stream)
1174 fprintf(stream, "Oops, something went wrong.\n");
1178 "The -bI: flag takes a string indicating which information to provide.\n"
1179 "If the string is not recognised, you'll get this help (on stderr).\n"
1181 " exim -bI:help this information\n"
1182 " exim -bI:dscp list of known dscp value keywords\n"
1183 " exim -bI:sieve list of supported sieve extensions\n"
1187 for (const uschar ** pp = exim_sieve_extension_list; *pp; ++pp)
1188 fprintf(stream, "%s\n", *pp);
1191 dscp_list_to_stream(stream);
1197 /*************************************************
1198 * Quote a local part *
1199 *************************************************/
1201 /* This function is used when a sender address or a From: or Sender: header
1202 line is being created from the caller's login, or from an authenticated_id. It
1203 applies appropriate quoting rules for a local part.
1205 Argument: the local part
1206 Returns: the local part, quoted if necessary
1210 local_part_quote(uschar *lpart)
1212 BOOL needs_quote = FALSE;
1215 for (uschar * t = lpart; !needs_quote && *t != 0; t++)
1217 needs_quote = !isalnum(*t) && strchr("!#$%&'*+-/=?^_`{|}~", *t) == NULL &&
1218 (*t != '.' || t == lpart || t[1] == 0);
1221 if (!needs_quote) return lpart;
1223 g = string_catn(NULL, US"\"", 1);
1227 uschar *nq = US Ustrpbrk(lpart, "\\\"");
1230 g = string_cat(g, lpart);
1233 g = string_catn(g, lpart, nq - lpart);
1234 g = string_catn(g, US"\\", 1);
1235 g = string_catn(g, nq, 1);
1239 g = string_catn(g, US"\"", 1);
1240 return string_from_gstring(g);
1246 /*************************************************
1247 * Load readline() functions *
1248 *************************************************/
1250 /* This function is called from testing executions that read data from stdin,
1251 but only when running as the calling user. Currently, only -be does this. The
1252 function loads the readline() function library and passes back the functions.
1253 On some systems, it needs the curses library, so load that too, but try without
1254 it if loading fails. All this functionality has to be requested at build time.
1257 fn_readline_ptr pointer to where to put the readline pointer
1258 fn_addhist_ptr pointer to where to put the addhistory function
1260 Returns: the dlopen handle or NULL on failure
1264 set_readline(char * (**fn_readline_ptr)(const char *),
1265 void (**fn_addhist_ptr)(const char *))
1268 void *dlhandle_curses = dlopen("libcurses." DYNLIB_FN_EXT, RTLD_GLOBAL|RTLD_LAZY);
1270 dlhandle = dlopen("libreadline." DYNLIB_FN_EXT, RTLD_GLOBAL|RTLD_NOW);
1271 if (dlhandle_curses) dlclose(dlhandle_curses);
1275 /* Checked manual pages; at least in GNU Readline 6.1, the prototypes are:
1276 * char * readline (const char *prompt);
1277 * void add_history (const char *string);
1279 *fn_readline_ptr = (char *(*)(const char*))dlsym(dlhandle, "readline");
1280 *fn_addhist_ptr = (void(*)(const char*))dlsym(dlhandle, "add_history");
1283 DEBUG(D_any) debug_printf("failed to load readline: %s\n", dlerror());
1291 /*************************************************
1292 * Get a line from stdin for testing things *
1293 *************************************************/
1295 /* This function is called when running tests that can take a number of lines
1296 of input (for example, -be and -bt). It handles continuations and trailing
1297 spaces. And prompting and a blank line output on eof. If readline() is in use,
1298 the arguments are non-NULL and provide the relevant functions.
1301 fn_readline readline function or NULL
1302 fn_addhist addhist function or NULL
1304 Returns: pointer to dynamic memory, or NULL at end of file
1308 get_stdinput(char *(*fn_readline)(const char *), void(*fn_addhist)(const char *))
1312 if (!fn_readline) { printf("> "); fflush(stdout); }
1314 for (int i = 0;; i++)
1316 uschar buffer[1024];
1320 char *readline_line = NULL;
1323 if (!(readline_line = fn_readline((i > 0)? "":"> "))) break;
1324 if (*readline_line != 0 && fn_addhist) fn_addhist(readline_line);
1325 p = US readline_line;
1330 /* readline() not in use */
1333 if (Ufgets(buffer, sizeof(buffer), stdin) == NULL) break;
1337 /* Handle the line */
1339 ss = p + (int)Ustrlen(p);
1340 while (ss > p && isspace(ss[-1])) ss--;
1343 while (p < ss && isspace(*p)) p++; /* leading space after cont */
1345 g = string_catn(g, p, ss - p);
1348 if (fn_readline) free(readline_line);
1351 /* g can only be NULL if ss==p */
1352 if (ss == p || g->s[g->ptr-1] != '\\')
1356 (void) string_from_gstring(g);
1359 if (!g) printf("\n");
1360 return string_from_gstring(g);
1365 /*************************************************
1366 * Output usage information for the program *
1367 *************************************************/
1369 /* This function is called when there are no recipients
1370 or a specific --help argument was added.
1373 progname information on what name we were called by
1375 Returns: DOES NOT RETURN
1379 exim_usage(uschar *progname)
1382 /* Handle specific program invocation variants */
1383 if (Ustrcmp(progname, US"-mailq") == 0)
1385 "mailq - list the contents of the mail queue\n\n"
1386 "For a list of options, see the Exim documentation.\n");
1388 /* Generic usage - we output this whatever happens */
1390 "Exim is a Mail Transfer Agent. It is normally called by Mail User Agents,\n"
1391 "not directly from a shell command line. Options and/or arguments control\n"
1392 "what it does when called. For a list of options, see the Exim documentation.\n");
1397 /*************************************************
1398 * Validate that the macros given are okay *
1399 *************************************************/
1401 /* Typically, Exim will drop privileges if macros are supplied. In some
1402 cases, we want to not do so.
1404 Arguments: opt_D_used - true if the commandline had a "-D" option
1405 Returns: true if trusted, false otherwise
1409 macros_trusted(BOOL opt_D_used)
1411 #ifdef WHITELIST_D_MACROS
1412 uschar *whitelisted, *end, *p, **whites;
1413 int white_count, i, n;
1415 BOOL prev_char_item, found;
1420 #ifndef WHITELIST_D_MACROS
1424 /* We only trust -D overrides for some invoking users:
1425 root, the exim run-time user, the optional config owner user.
1426 I don't know why config-owner would be needed, but since they can own the
1427 config files anyway, there's no security risk to letting them override -D. */
1428 if ( ! ((real_uid == root_uid)
1429 || (real_uid == exim_uid)
1430 #ifdef CONFIGURE_OWNER
1431 || (real_uid == config_uid)
1435 debug_printf("macros_trusted rejecting macros for uid %d\n", (int) real_uid);
1439 /* Get a list of macros which are whitelisted */
1440 whitelisted = string_copy_perm(US WHITELIST_D_MACROS, FALSE);
1441 prev_char_item = FALSE;
1443 for (p = whitelisted; *p != '\0'; ++p)
1445 if (*p == ':' || isspace(*p))
1450 prev_char_item = FALSE;
1453 if (!prev_char_item)
1454 prev_char_item = TRUE;
1461 whites = store_malloc(sizeof(uschar *) * (white_count+1));
1462 for (p = whitelisted, i = 0; (p != end) && (i < white_count); ++p)
1467 if (i == white_count)
1469 while (*p != '\0' && p < end)
1475 /* The list of commandline macros should be very short.
1476 Accept the N*M complexity. */
1477 for (macro_item * m = macros_user; m; m = m->next) if (m->command_line)
1480 for (uschar ** w = whites; *w; ++w)
1481 if (Ustrcmp(*w, m->name) == 0)
1488 if (!m->replacement)
1490 if ((len = m->replen) == 0)
1492 n = pcre_exec(regex_whitelisted_macro, NULL, CS m->replacement, len,
1493 0, PCRE_EOPT, NULL, 0);
1496 if (n != PCRE_ERROR_NOMATCH)
1497 debug_printf("macros_trusted checking %s returned %d\n", m->name, n);
1501 DEBUG(D_any) debug_printf("macros_trusted overridden to true by whitelisting\n");
1507 /*************************************************
1508 * Expansion testing *
1509 *************************************************/
1511 /* Expand and print one item, doing macro-processing.
1514 item line for expansion
1518 expansion_test_line(uschar * line)
1523 Ustrncpy(big_buffer, line, big_buffer_size);
1524 big_buffer[big_buffer_size-1] = '\0';
1525 len = Ustrlen(big_buffer);
1527 (void) macros_expand(0, &len, &dummy_macexp);
1529 if (isupper(big_buffer[0]))
1531 if (macro_read_assignment(big_buffer))
1532 printf("Defined macro '%s'\n", mlast->name);
1535 if ((line = expand_string(big_buffer))) printf("%s\n", CS line);
1536 else printf("Failed: %s\n", expand_string_message);
1541 /*************************************************
1542 * Entry point and high-level code *
1543 *************************************************/
1545 /* Entry point for the Exim mailer. Analyse the arguments and arrange to take
1546 the appropriate action. All the necessary functions are present in the one
1547 binary. I originally thought one should split it up, but it turns out that so
1548 much of the apparatus is needed in each chunk that one might as well just have
1549 it all available all the time, which then makes the coding easier as well.
1552 argc count of entries in argv
1553 argv argument strings, with argv[0] being the program name
1555 Returns: EXIT_SUCCESS if terminated successfully
1556 EXIT_FAILURE otherwise, except when a message has been sent
1557 to the sender, and -oee was given
1561 main(int argc, char **cargv)
1563 uschar **argv = USS cargv;
1564 int arg_receive_timeout = -1;
1565 int arg_smtp_receive_timeout = -1;
1566 int arg_error_handling = error_handling;
1567 int filter_sfd = -1;
1568 int filter_ufd = -1;
1571 int list_queue_option = 0;
1573 int msg_action_arg = -1;
1574 int namelen = (argv[0] == NULL)? 0 : Ustrlen(argv[0]);
1575 int queue_only_reason = 0;
1577 int perl_start_option = 0;
1579 int recipients_arg = argc;
1580 int sender_address_domain = 0;
1581 int test_retry_arg = -1;
1582 int test_rewrite_arg = -1;
1583 gid_t original_egid;
1584 BOOL arg_queue_only = FALSE;
1585 BOOL bi_option = FALSE;
1586 BOOL checking = FALSE;
1587 BOOL count_queue = FALSE;
1588 BOOL expansion_test = FALSE;
1589 BOOL extract_recipients = FALSE;
1590 BOOL flag_G = FALSE;
1591 BOOL flag_n = FALSE;
1592 BOOL forced_delivery = FALSE;
1593 BOOL f_end_dot = FALSE;
1594 BOOL deliver_give_up = FALSE;
1595 BOOL list_queue = FALSE;
1596 BOOL list_options = FALSE;
1597 BOOL list_config = FALSE;
1598 BOOL local_queue_only;
1600 BOOL one_msg_action = FALSE;
1601 BOOL opt_D_used = FALSE;
1602 BOOL queue_only_set = FALSE;
1603 BOOL receiving_message = TRUE;
1604 BOOL sender_ident_set = FALSE;
1605 BOOL session_local_queue_only;
1607 BOOL removed_privilege = FALSE;
1608 BOOL usage_wanted = FALSE;
1609 BOOL verify_address_mode = FALSE;
1610 BOOL verify_as_sender = FALSE;
1611 BOOL version_printed = FALSE;
1612 uschar *alias_arg = NULL;
1613 uschar *called_as = US"";
1614 uschar *cmdline_syslog_name = NULL;
1615 uschar *start_queue_run_id = NULL;
1616 uschar *stop_queue_run_id = NULL;
1617 uschar *expansion_test_message = NULL;
1618 uschar *ftest_domain = NULL;
1619 uschar *ftest_localpart = NULL;
1620 uschar *ftest_prefix = NULL;
1621 uschar *ftest_suffix = NULL;
1622 uschar *log_oneline = NULL;
1623 uschar *malware_test_file = NULL;
1624 uschar *real_sender_address;
1625 uschar *originator_home = US"/";
1630 struct stat statbuf;
1631 pid_t passed_qr_pid = (pid_t)0;
1632 int passed_qr_pipe = -1;
1633 gid_t group_list[EXIM_GROUPLIST_SIZE];
1635 /* For the -bI: flag */
1636 enum commandline_info info_flag = CMDINFO_NONE;
1637 BOOL info_stdout = FALSE;
1639 /* Possible options for -R and -S */
1641 static uschar *rsopts[] = { US"f", US"ff", US"r", US"rf", US"rff" };
1643 /* Need to define this in case we need to change the environment in order
1644 to get rid of a bogus time zone. We have to make it char rather than uschar
1645 because some OS define it in /usr/include/unistd.h. */
1647 extern char **environ;
1649 #ifdef MEASURE_TIMING
1650 (void)gettimeofday(×tamp_startup, NULL);
1653 /* If the Exim user and/or group and/or the configuration file owner/group were
1654 defined by ref:name at build time, we must now find the actual uid/gid values.
1655 This is a feature to make the lives of binary distributors easier. */
1657 #ifdef EXIM_USERNAME
1658 if (route_finduser(US EXIM_USERNAME, &pw, &exim_uid))
1661 exim_fail("exim: refusing to run with uid 0 for \"%s\"\n", EXIM_USERNAME);
1663 /* If ref:name uses a number as the name, route_finduser() returns
1664 TRUE with exim_uid set and pw coerced to NULL. */
1666 exim_gid = pw->pw_gid;
1667 #ifndef EXIM_GROUPNAME
1670 "exim: ref:name should specify a usercode, not a group.\n"
1671 "exim: can't let you get away with it unless you also specify a group.\n");
1675 exim_fail("exim: failed to find uid for user name \"%s\"\n", EXIM_USERNAME);
1678 #ifdef EXIM_GROUPNAME
1679 if (!route_findgroup(US EXIM_GROUPNAME, &exim_gid))
1680 exim_fail("exim: failed to find gid for group name \"%s\"\n", EXIM_GROUPNAME);
1683 #ifdef CONFIGURE_OWNERNAME
1684 if (!route_finduser(US CONFIGURE_OWNERNAME, NULL, &config_uid))
1685 exim_fail("exim: failed to find uid for user name \"%s\"\n",
1686 CONFIGURE_OWNERNAME);
1689 /* We default the system_filter_user to be the Exim run-time user, as a
1690 sane non-root value. */
1691 system_filter_uid = exim_uid;
1693 #ifdef CONFIGURE_GROUPNAME
1694 if (!route_findgroup(US CONFIGURE_GROUPNAME, &config_gid))
1695 exim_fail("exim: failed to find gid for group name \"%s\"\n",
1696 CONFIGURE_GROUPNAME);
1699 /* In the Cygwin environment, some initialization used to need doing.
1700 It was fudged in by means of this macro; now no longer but we'll leave
1701 it in case of others. */
1707 /* Check a field which is patched when we are running Exim within its
1708 testing harness; do a fast initial check, and then the whole thing. */
1710 f.running_in_test_harness =
1711 *running_status == '<' && Ustrcmp(running_status, "<<<testing>>>") == 0;
1712 if (f.running_in_test_harness)
1715 /* The C standard says that the equivalent of setlocale(LC_ALL, "C") is obeyed
1716 at the start of a program; however, it seems that some environments do not
1717 follow this. A "strange" locale can affect the formatting of timestamps, so we
1720 setlocale(LC_ALL, "C");
1722 /* Get the offset between CLOCK_MONOTONIC and wallclock */
1724 #ifdef _POSIX_MONOTONIC_CLOCK
1728 /* Set up the default handler for timing using alarm(). */
1730 os_non_restarting_signal(SIGALRM, sigalrm_handler);
1732 /* Ensure we have a buffer for constructing log entries. Use malloc directly,
1733 because store_malloc writes a log entry on failure. */
1735 if (!(log_buffer = US malloc(LOG_BUFFER_SIZE)))
1736 exim_fail("exim: failed to get store for log buffer\n");
1738 /* Initialize the default log options. */
1740 bits_set(log_selector, log_selector_size, log_default);
1742 /* Set log_stderr to stderr, provided that stderr exists. This gets reset to
1743 NULL when the daemon is run and the file is closed. We have to use this
1744 indirection, because some systems don't allow writing to the variable "stderr".
1747 if (fstat(fileno(stderr), &statbuf) >= 0) log_stderr = stderr;
1749 /* Arrange for the PCRE regex library to use our store functions. Note that
1750 the normal calls are actually macros that add additional arguments for
1751 debugging purposes so we have to assign specially constructed functions here.
1752 The default is to use store in the stacking pool, but this is overridden in the
1753 regex_must_compile() function. */
1755 pcre_malloc = function_store_get;
1756 pcre_free = function_dummy_free;
1758 /* Ensure there is a big buffer for temporary use in several places. It is put
1759 in malloc store so that it can be freed for enlargement if necessary. */
1761 big_buffer = store_malloc(big_buffer_size);
1763 /* Set up the handler for the data request signal, and set the initial
1764 descriptive text. */
1766 process_info = store_get(PROCESS_INFO_SIZE, TRUE); /* tainted */
1767 set_process_info("initializing");
1768 os_restarting_signal(SIGUSR1, usr1_handler);
1770 /* If running in a dockerized environment, the TERM signal is only
1771 delegated to the PID 1 if we request it by setting an signal handler */
1772 if (getpid() == 1) signal(SIGTERM, term_handler);
1774 /* SIGHUP is used to get the daemon to reconfigure. It gets set as appropriate
1775 in the daemon code. For the rest of Exim's uses, we ignore it. */
1777 signal(SIGHUP, SIG_IGN);
1779 /* We don't want to die on pipe errors as the code is written to handle
1780 the write error instead. */
1782 signal(SIGPIPE, SIG_IGN);
1784 /* Under some circumstance on some OS, Exim can get called with SIGCHLD
1785 set to SIG_IGN. This causes subprocesses that complete before the parent
1786 process waits for them not to hang around, so when Exim calls wait(), nothing
1787 is there. The wait() code has been made robust against this, but let's ensure
1788 that SIGCHLD is set to SIG_DFL, because it's tidier to wait and get a process
1789 ending status. We use sigaction rather than plain signal() on those OS where
1790 SA_NOCLDWAIT exists, because we want to be sure it is turned off. (There was a
1791 problem on AIX with this.) */
1795 struct sigaction act;
1796 act.sa_handler = SIG_DFL;
1797 sigemptyset(&(act.sa_mask));
1799 sigaction(SIGCHLD, &act, NULL);
1802 signal(SIGCHLD, SIG_DFL);
1805 /* Save the arguments for use if we re-exec exim as a daemon after receiving
1810 /* Set up the version number. Set up the leading 'E' for the external form of
1811 message ids, set the pointer to the internal form, and initialize it to
1812 indicate no message being processed. */
1815 message_id_option[0] = '-';
1816 message_id_external = message_id_option + 1;
1817 message_id_external[0] = 'E';
1818 message_id = message_id_external + 1;
1821 /* Set the umask to zero so that any files Exim creates using open() are
1822 created with the modes that it specifies. NOTE: Files created with fopen() have
1823 a problem, which was not recognized till rather late (February 2006). With this
1824 umask, such files will be world writeable. (They are all content scanning files
1825 in the spool directory, which isn't world-accessible, so this is not a
1826 disaster, but it's untidy.) I don't want to change this overall setting,
1827 however, because it will interact badly with the open() calls. Instead, there's
1828 now a function called modefopen() that fiddles with the umask while calling
1833 /* Precompile the regular expression for matching a message id. Keep this in
1834 step with the code that generates ids in the accept.c module. We need to do
1835 this here, because the -M options check their arguments for syntactic validity
1836 using mac_ismsgid, which uses this. */
1839 regex_must_compile(US"^(?:[^\\W_]{6}-){2}[^\\W_]{2}$", FALSE, TRUE);
1841 /* Precompile the regular expression that is used for matching an SMTP error
1842 code, possibly extended, at the start of an error message. Note that the
1843 terminating whitespace character is included. */
1846 regex_must_compile(US"^\\d\\d\\d\\s(?:\\d\\.\\d\\d?\\d?\\.\\d\\d?\\d?\\s)?",
1849 #ifdef WHITELIST_D_MACROS
1850 /* Precompile the regular expression used to filter the content of macros
1851 given to -D for permissibility. */
1853 regex_whitelisted_macro =
1854 regex_must_compile(US"^[A-Za-z0-9_/.-]*$", FALSE, TRUE);
1857 for (i = 0; i < REGEX_VARS; i++) regex_vars[i] = NULL;
1859 /* If the program is called as "mailq" treat it as equivalent to "exim -bp";
1860 this seems to be a generally accepted convention, since one finds symbolic
1861 links called "mailq" in standard OS configurations. */
1863 if ((namelen == 5 && Ustrcmp(argv[0], "mailq") == 0) ||
1864 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/mailq", 6) == 0))
1867 receiving_message = FALSE;
1868 called_as = US"-mailq";
1871 /* If the program is called as "rmail" treat it as equivalent to
1872 "exim -i -oee", thus allowing UUCP messages to be input using non-SMTP mode,
1873 i.e. preventing a single dot on a line from terminating the message, and
1874 returning with zero return code, even in cases of error (provided an error
1875 message has been sent). */
1877 if ((namelen == 5 && Ustrcmp(argv[0], "rmail") == 0) ||
1878 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/rmail", 6) == 0))
1881 called_as = US"-rmail";
1882 errors_sender_rc = EXIT_SUCCESS;
1885 /* If the program is called as "rsmtp" treat it as equivalent to "exim -bS";
1886 this is a smail convention. */
1888 if ((namelen == 5 && Ustrcmp(argv[0], "rsmtp") == 0) ||
1889 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/rsmtp", 6) == 0))
1891 smtp_input = smtp_batched_input = TRUE;
1892 called_as = US"-rsmtp";
1895 /* If the program is called as "runq" treat it as equivalent to "exim -q";
1896 this is a smail convention. */
1898 if ((namelen == 4 && Ustrcmp(argv[0], "runq") == 0) ||
1899 (namelen > 4 && Ustrncmp(argv[0] + namelen - 5, "/runq", 5) == 0))
1902 receiving_message = FALSE;
1903 called_as = US"-runq";
1906 /* If the program is called as "newaliases" treat it as equivalent to
1907 "exim -bi"; this is a sendmail convention. */
1909 if ((namelen == 10 && Ustrcmp(argv[0], "newaliases") == 0) ||
1910 (namelen > 10 && Ustrncmp(argv[0] + namelen - 11, "/newaliases", 11) == 0))
1913 receiving_message = FALSE;
1914 called_as = US"-newaliases";
1917 /* Save the original effective uid for a couple of uses later. It should
1918 normally be root, but in some esoteric environments it may not be. */
1920 original_euid = geteuid();
1921 original_egid = getegid();
1923 /* Get the real uid and gid. If the caller is root, force the effective uid/gid
1924 to be the same as the real ones. This makes a difference only if Exim is setuid
1925 (or setgid) to something other than root, which could be the case in some
1926 special configurations. */
1928 real_uid = getuid();
1929 real_gid = getgid();
1931 if (real_uid == root_uid)
1933 if ((rv = setgid(real_gid)))
1934 exim_fail("exim: setgid(%ld) failed: %s\n",
1935 (long int)real_gid, strerror(errno));
1936 if ((rv = setuid(real_uid)))
1937 exim_fail("exim: setuid(%ld) failed: %s\n",
1938 (long int)real_uid, strerror(errno));
1941 /* If neither the original real uid nor the original euid was root, Exim is
1942 running in an unprivileged state. */
1944 unprivileged = (real_uid != root_uid && original_euid != root_uid);
1946 /* Scan the program's arguments. Some can be dealt with right away; others are
1947 simply recorded for checking and handling afterwards. Do a high-level switch
1948 on the second character (the one after '-'), to save some effort. */
1950 for (i = 1; i < argc; i++)
1952 BOOL badarg = FALSE;
1953 uschar *arg = argv[i];
1957 /* An argument not starting with '-' is the start of a recipients list;
1958 break out of the options-scanning loop. */
1966 /* An option consisting of -- terminates the options */
1968 if (Ustrcmp(arg, "--") == 0)
1970 recipients_arg = i + 1;
1974 /* Handle flagged options */
1976 switchchar = arg[1];
1979 /* Make all -ex options synonymous with -oex arguments, since that
1980 is assumed by various callers. Also make -qR options synonymous with -R
1981 options, as that seems to be required as well. Allow for -qqR too, and
1982 the same for -S options. */
1984 if (Ustrncmp(arg+1, "oe", 2) == 0 ||
1985 Ustrncmp(arg+1, "qR", 2) == 0 ||
1986 Ustrncmp(arg+1, "qS", 2) == 0)
1988 switchchar = arg[2];
1991 else if (Ustrncmp(arg+1, "qqR", 3) == 0 || Ustrncmp(arg+1, "qqS", 3) == 0)
1993 switchchar = arg[3];
1995 f.queue_2stage = TRUE;
1998 /* Make -r synonymous with -f, since it is a documented alias */
2000 else if (arg[1] == 'r') switchchar = 'f';
2002 /* Make -ov synonymous with -v */
2004 else if (Ustrcmp(arg, "-ov") == 0)
2010 /* deal with --option_aliases */
2011 else if (switchchar == '-')
2013 if (Ustrcmp(argrest, "help") == 0)
2015 usage_wanted = TRUE;
2018 else if (Ustrcmp(argrest, "version") == 0)
2025 /* High-level switch on active initial letter */
2030 /* sendmail uses -Ac and -Am to control which .cf file is used;
2033 if (*argrest == '\0') { badarg = TRUE; break; }
2036 BOOL ignore = FALSE;
2041 if (*(argrest + 1) == '\0')
2045 if (!ignore) badarg = TRUE;
2049 /* -Btype is a sendmail option for 7bit/8bit setting. Exim is 8-bit clean
2050 so has no need of it. */
2053 if (!*argrest) i++; /* Skip over the type */
2059 receiving_message = FALSE; /* Reset TRUE for -bm, -bS, -bs below */
2063 /* -bd: Run in daemon mode, awaiting SMTP connections.
2064 -bdf: Ditto, but in the foreground.
2067 f.daemon_listen = TRUE;
2068 if (*argrest == 'f') f.background_daemon = FALSE;
2069 else if (*argrest) badarg = TRUE;
2072 /* -be: Run in expansion test mode
2073 -bem: Ditto, but read a message from a file first
2076 expansion_test = checking = TRUE;
2077 if (*argrest == 'm')
2079 if (++i >= argc) { badarg = TRUE; break; }
2080 expansion_test_message = argv[i];
2083 if (*argrest) badarg = TRUE;
2086 /* -bF: Run system filter test */
2088 filter_test |= checking = FTEST_SYSTEM;
2089 if (*argrest) { badarg = TRUE; break; }
2090 if (++i < argc) filter_test_sfile = argv[i]; else
2091 exim_fail("exim: file name expected after %s\n", argv[i-1]);
2094 /* -bf: Run user filter test
2095 -bfd: Set domain for filter testing
2096 -bfl: Set local part for filter testing
2097 -bfp: Set prefix for filter testing
2098 -bfs: Set suffix for filter testing
2103 filter_test |= checking = FTEST_USER;
2104 if (++i < argc) filter_test_ufile = argv[i];
2105 else exim_fail("exim: file name expected after %s\n", argv[i-1]);
2110 exim_fail("exim: string expected after %s\n", arg);
2111 if (Ustrcmp(argrest, "d") == 0) ftest_domain = argv[i];
2112 else if (Ustrcmp(argrest, "l") == 0) ftest_localpart = argv[i];
2113 else if (Ustrcmp(argrest, "p") == 0) ftest_prefix = argv[i];
2114 else if (Ustrcmp(argrest, "s") == 0) ftest_suffix = argv[i];
2119 /* -bh: Host checking - an IP address must follow. */
2121 if (!*argrest || Ustrcmp(argrest, "c") == 0)
2123 if (++i >= argc) { badarg = TRUE; break; }
2124 sender_host_address = argv[i];
2125 host_checking = checking = f.log_testing_mode = TRUE;
2126 f.host_checking_callout = *argrest == 'c';
2127 message_logs = FALSE;
2132 /* -bi: This option is used by sendmail to initialize *the* alias file,
2133 though it has the -oA option to specify a different file. Exim has no
2134 concept of *the* alias file, but since Sun's YP make script calls
2135 sendmail this way, some support must be provided. */
2137 if (!*++argrest) bi_option = TRUE;
2141 /* -bI: provide information, of the type to follow after a colon.
2142 This is an Exim flag. */
2144 if (Ustrlen(argrest) >= 1 && *argrest == ':')
2146 uschar *p = argrest+1;
2147 info_flag = CMDINFO_HELP;
2149 if (strcmpic(p, CUS"sieve") == 0)
2151 info_flag = CMDINFO_SIEVE;
2154 else if (strcmpic(p, CUS"dscp") == 0)
2156 info_flag = CMDINFO_DSCP;
2159 else if (strcmpic(p, CUS"help") == 0)
2165 /* -bm: Accept and deliver message - the default option. Reinstate
2166 receiving_message, which got turned off for all -b options.
2167 -bmalware: test the filename given for malware */
2169 if (!*argrest) receiving_message = TRUE;
2170 else if (Ustrcmp(argrest, "alware") == 0)
2172 if (++i >= argc) { badarg = TRUE; break; }
2174 malware_test_file = argv[i];
2179 /* -bnq: For locally originating messages, do not qualify unqualified
2180 addresses. In the envelope, this causes errors; in header lines they
2183 if (Ustrcmp(argrest, "q") == 0)
2185 f.allow_unqualified_sender = FALSE;
2186 f.allow_unqualified_recipient = FALSE;
2191 /* -bpxx: List the contents of the mail queue, in various forms. If
2192 the option is -bpc, just a queue count is needed. Otherwise, if the
2193 first letter after p is r, then order is random. */
2195 if (*argrest == 'c')
2198 if (*++argrest) badarg = TRUE;
2202 if (*argrest == 'r')
2204 list_queue_option = 8;
2207 else list_queue_option = 0;
2211 /* -bp: List the contents of the mail queue, top-level only */
2215 /* -bpu: List the contents of the mail queue, top-level undelivered */
2217 else if (Ustrcmp(argrest, "u") == 0) list_queue_option += 1;
2219 /* -bpa: List the contents of the mail queue, including all delivered */
2221 else if (Ustrcmp(argrest, "a") == 0) list_queue_option += 2;
2223 /* Unknown after -bp[r] */
2229 /* -bP: List the configuration variables given as the address list.
2230 Force -v, so configuration errors get displayed. */
2233 /* -bP config: we need to setup here, because later,
2234 * when list_options is checked, the config is read already */
2237 else if (argv[i+1] && Ustrcmp(argv[i+1], "config") == 0)
2240 readconf_save_config(version_string);
2244 list_options = TRUE;
2245 debug_selector |= D_v;
2246 debug_file = stderr;
2250 /* -brt: Test retry configuration lookup */
2252 if (Ustrcmp(argrest, "t") == 0)
2255 test_retry_arg = i + 1;
2259 /* -brw: Test rewrite configuration */
2261 else if (Ustrcmp(argrest, "w") == 0)
2264 test_rewrite_arg = i + 1;
2270 /* -bS: Read SMTP commands on standard input, but produce no replies -
2271 all errors are reported by sending messages. */
2274 smtp_input = smtp_batched_input = receiving_message = TRUE;
2278 /* -bs: Read SMTP commands on standard input and produce SMTP replies
2279 on standard output. */
2281 if (!*argrest) smtp_input = receiving_message = TRUE;
2285 /* -bt: address testing mode */
2288 f.address_test_mode = checking = f.log_testing_mode = TRUE;
2292 /* -bv: verify addresses */
2295 verify_address_mode = checking = f.log_testing_mode = TRUE;
2297 /* -bvs: verify sender addresses */
2299 else if (Ustrcmp(argrest, "s") == 0)
2301 verify_address_mode = checking = f.log_testing_mode = TRUE;
2302 verify_as_sender = TRUE;
2307 /* -bV: Print version string and support details */
2311 printf("Exim version %s #%s built %s\n", version_string,
2312 version_cnumber, version_date);
2313 printf("%s\n", CS version_copyright);
2314 version_printed = TRUE;
2315 show_whats_supported(stdout);
2316 f.log_testing_mode = TRUE;
2321 /* -bw: inetd wait mode, accept a listening socket as stdin */
2323 f.inetd_wait_mode = TRUE;
2324 f.background_daemon = FALSE;
2325 f.daemon_listen = TRUE;
2327 if ((inetd_wait_timeout = readconf_readtime(argrest, 0, FALSE)) <= 0)
2328 exim_fail("exim: bad time value %s: abandoned\n", argv[i]);
2339 /* -C: change configuration file list; ignore if it isn't really
2340 a change! Enforce a prefix check if required. */
2345 if(++i < argc) argrest = argv[i]; else
2346 { badarg = TRUE; break; }
2348 if (Ustrcmp(config_main_filelist, argrest) != 0)
2350 #ifdef ALT_CONFIG_PREFIX
2352 int len = Ustrlen(ALT_CONFIG_PREFIX);
2353 const uschar *list = argrest;
2355 while((filename = string_nextinlist(&list, &sep, big_buffer,
2356 big_buffer_size)) != NULL)
2358 if ((Ustrlen(filename) < len ||
2359 Ustrncmp(filename, ALT_CONFIG_PREFIX, len) != 0 ||
2360 Ustrstr(filename, "/../") != NULL) &&
2361 (Ustrcmp(filename, "/dev/null") != 0 || real_uid != root_uid))
2362 exim_fail("-C Permission denied\n");
2365 if (real_uid != root_uid)
2367 #ifdef TRUSTED_CONFIG_LIST
2369 if (real_uid != exim_uid
2370 #ifdef CONFIGURE_OWNER
2371 && real_uid != config_uid
2374 f.trusted_config = FALSE;
2377 FILE *trust_list = Ufopen(TRUSTED_CONFIG_LIST, "rb");
2380 struct stat statbuf;
2382 if (fstat(fileno(trust_list), &statbuf) != 0 ||
2383 (statbuf.st_uid != root_uid /* owner not root */
2384 #ifdef CONFIGURE_OWNER
2385 && statbuf.st_uid != config_uid /* owner not the special one */
2388 (statbuf.st_gid != root_gid /* group not root */
2389 #ifdef CONFIGURE_GROUP
2390 && statbuf.st_gid != config_gid /* group not the special one */
2392 && (statbuf.st_mode & 020) != 0 /* group writeable */
2394 (statbuf.st_mode & 2) != 0) /* world writeable */
2396 f.trusted_config = FALSE;
2401 /* Well, the trust list at least is up to scratch... */
2402 rmark reset_point = store_mark();
2403 uschar *trusted_configs[32];
2407 while (Ufgets(big_buffer, big_buffer_size, trust_list))
2409 uschar *start = big_buffer, *nl;
2410 while (*start && isspace(*start))
2414 nl = Ustrchr(start, '\n');
2417 trusted_configs[nr_configs++] = string_copy(start);
2418 if (nr_configs == 32)
2426 const uschar *list = argrest;
2428 while (f.trusted_config && (filename = string_nextinlist(&list,
2429 &sep, big_buffer, big_buffer_size)) != NULL)
2431 for (i=0; i < nr_configs; i++)
2432 if (Ustrcmp(filename, trusted_configs[i]) == 0)
2434 if (i == nr_configs)
2436 f.trusted_config = FALSE;
2441 else /* No valid prefixes found in trust_list file. */
2442 f.trusted_config = FALSE;
2443 store_reset(reset_point);
2446 else /* Could not open trust_list file. */
2447 f.trusted_config = FALSE;
2450 /* Not root; don't trust config */
2451 f.trusted_config = FALSE;
2455 config_main_filelist = argrest;
2456 f.config_changed = TRUE;
2461 /* -D: set up a macro definition */
2464 #ifdef DISABLE_D_OPTION
2465 exim_fail("exim: -D is not available in this Exim binary\n");
2471 uschar *s = argrest;
2474 while (isspace(*s)) s++;
2476 if (*s < 'A' || *s > 'Z')
2477 exim_fail("exim: macro name set by -D must start with "
2478 "an upper case letter\n");
2480 while (isalnum(*s) || *s == '_')
2482 if (ptr < sizeof(name)-1) name[ptr++] = *s;
2486 if (ptr == 0) { badarg = TRUE; break; }
2487 while (isspace(*s)) s++;
2490 if (*s++ != '=') { badarg = TRUE; break; }
2491 while (isspace(*s)) s++;
2494 for (m = macros_user; m; m = m->next)
2495 if (Ustrcmp(m->name, name) == 0)
2496 exim_fail("exim: duplicated -D in command line\n");
2498 m = macro_create(name, s, TRUE);
2500 if (clmacro_count >= MAX_CLMACROS)
2501 exim_fail("exim: too many -D options on command line\n");
2502 clmacros[clmacro_count++] =
2503 string_sprintf("-D%s=%s", m->name, m->replacement);
2508 /* -d: Set debug level (see also -v below) or set the drop_cr option.
2509 The latter is now a no-op, retained for compatibility only. If -dd is used,
2510 debugging subprocesses of the daemon is disabled. */
2513 if (Ustrcmp(argrest, "ropcr") == 0)
2515 /* drop_cr = TRUE; */
2518 /* Use an intermediate variable so that we don't set debugging while
2519 decoding the debugging bits. */
2523 unsigned int selector = D_default;
2526 if (*argrest == 'd')
2528 f.debug_daemon = TRUE;
2532 decode_bits(&selector, 1, debug_notall, argrest,
2533 debug_options, debug_options_count, US"debug", 0);
2534 debug_selector = selector;
2539 /* -E: This is a local error message. This option is not intended for
2540 external use at all, but is not restricted to trusted callers because it
2541 does no harm (just suppresses certain error messages) and if Exim is run
2542 not setuid root it won't always be trusted when it generates error
2543 messages using this option. If there is a message id following -E, point
2544 message_reference at it, for logging. */
2547 f.local_error_message = TRUE;
2548 if (mac_ismsgid(argrest)) message_reference = argrest;
2552 /* -ex: The vacation program calls sendmail with the undocumented "-eq"
2553 option, so it looks as if historically the -oex options are also callable
2554 without the leading -o. So we have to accept them. Before the switch,
2555 anything starting -oe has been converted to -e. Exim does not support all
2556 of the sendmail error options. */
2559 if (Ustrcmp(argrest, "e") == 0)
2561 arg_error_handling = ERRORS_SENDER;
2562 errors_sender_rc = EXIT_SUCCESS;
2564 else if (Ustrcmp(argrest, "m") == 0) arg_error_handling = ERRORS_SENDER;
2565 else if (Ustrcmp(argrest, "p") == 0) arg_error_handling = ERRORS_STDERR;
2566 else if (Ustrcmp(argrest, "q") == 0) arg_error_handling = ERRORS_STDERR;
2567 else if (Ustrcmp(argrest, "w") == 0) arg_error_handling = ERRORS_SENDER;
2572 /* -F: Set sender's full name, used instead of the gecos entry from
2573 the password file. Since users can usually alter their gecos entries,
2574 there's no security involved in using this instead. The data can follow
2575 the -F or be in the next argument. */
2580 if(++i < argc) argrest = argv[i]; else
2581 { badarg = TRUE; break; }
2583 originator_name = argrest;
2584 f.sender_name_forced = TRUE;
2588 /* -f: Set sender's address - this value is only actually used if Exim is
2589 run by a trusted user, or if untrusted_set_sender is set and matches the
2590 address, except that the null address can always be set by any user. The
2591 test for this happens later, when the value given here is ignored when not
2592 permitted. For an untrusted user, the actual sender is still put in Sender:
2593 if it doesn't match the From: header (unless no_local_from_check is set).
2594 The data can follow the -f or be in the next argument. The -r switch is an
2595 obsolete form of -f but since there appear to be programs out there that
2596 use anything that sendmail has ever supported, better accept it - the
2597 synonymizing is done before the switch above.
2599 At this stage, we must allow domain literal addresses, because we don't
2600 know what the setting of allow_domain_literals is yet. Ditto for trailing
2601 dots and strip_trailing_dot. */
2605 int dummy_start, dummy_end;
2609 if (i+1 < argc) argrest = argv[++i]; else
2610 { badarg = TRUE; break; }
2613 *(sender_address = store_get(1, FALSE)) = '\0'; /* Ensure writeable memory */
2616 uschar *temp = argrest + Ustrlen(argrest) - 1;
2617 while (temp >= argrest && isspace(*temp)) temp--;
2618 if (temp >= argrest && *temp == '.') f_end_dot = TRUE;
2619 allow_domain_literals = TRUE;
2620 strip_trailing_dot = TRUE;
2622 allow_utf8_domains = TRUE;
2624 sender_address = parse_extract_address(argrest, &errmess,
2625 &dummy_start, &dummy_end, &sender_address_domain, TRUE);
2626 sender_address = string_copy_taint(sender_address, TRUE);
2628 message_smtputf8 = string_is_utf8(sender_address);
2629 allow_utf8_domains = FALSE;
2631 allow_domain_literals = FALSE;
2632 strip_trailing_dot = FALSE;
2633 if (!sender_address)
2634 exim_fail("exim: bad -f address \"%s\": %s\n", argrest, errmess);
2636 f.sender_address_forced = TRUE;
2640 /* -G: sendmail invocation to specify that it's a gateway submission and
2641 sendmail may complain about problems instead of fixing them.
2642 We make it equivalent to an ACL "control = suppress_local_fixups" and do
2643 not at this time complain about problems. */
2649 /* -h: Set the hop count for an incoming message. Exim does not currently
2650 support this; it always computes it by counting the Received: headers.
2651 To put it in will require a change to the spool header file format. */
2656 if(++i < argc) argrest = argv[i]; else
2657 { badarg = TRUE; break; }
2659 if (!isdigit(*argrest)) badarg = TRUE;
2663 /* -i: Set flag so dot doesn't end non-SMTP input (same as -oi, seems
2664 not to be documented for sendmail but mailx (at least) uses it) */
2667 if (*argrest == 0) f.dot_ends = FALSE; else badarg = TRUE;
2671 /* -L: set the identifier used for syslog; equivalent to setting
2672 syslog_processname in the config file, but needs to be an admin option. */
2675 if (*argrest == '\0')
2677 if(++i < argc) argrest = argv[i]; else
2678 { badarg = TRUE; break; }
2680 if ((sz = Ustrlen(argrest)) > 32)
2681 exim_fail("exim: the -L syslog name is too long: \"%s\"\n", argrest);
2683 exim_fail("exim: the -L syslog name is too short\n");
2684 cmdline_syslog_name = argrest;
2688 receiving_message = FALSE;
2690 /* -MC: continue delivery of another message via an existing open
2691 file descriptor. This option is used for an internal call by the
2692 smtp transport when there is a pending message waiting to go to an
2693 address to which it has got a connection. Five subsequent arguments are
2694 required: transport name, host name, IP address, sequence number, and
2695 message_id. Transports may decline to create new processes if the sequence
2696 number gets too big. The channel is stdin. This (-MC) must be the last
2697 argument. There's a subsequent check that the real-uid is privileged.
2699 If we are running in the test harness. delay for a bit, to let the process
2700 that set this one up complete. This makes for repeatability of the logging,
2703 if (Ustrcmp(argrest, "C") == 0)
2705 union sockaddr_46 interface_sock;
2706 EXIM_SOCKLEN_T size = sizeof(interface_sock);
2709 exim_fail("exim: too many or too few arguments after -MC\n");
2711 if (msg_action_arg >= 0)
2712 exim_fail("exim: incompatible arguments\n");
2714 continue_transport = argv[++i];
2715 continue_hostname = argv[++i];
2716 continue_host_address = argv[++i];
2717 continue_sequence = Uatoi(argv[++i]);
2718 msg_action = MSG_DELIVER;
2719 msg_action_arg = ++i;
2720 forced_delivery = TRUE;
2721 queue_run_pid = passed_qr_pid;
2722 queue_run_pipe = passed_qr_pipe;
2724 if (!mac_ismsgid(argv[i]))
2725 exim_fail("exim: malformed message id %s after -MC option\n",
2728 /* Set up $sending_ip_address and $sending_port, unless proxied */
2730 if (!continue_proxy_cipher)
2731 if (getsockname(fileno(stdin), (struct sockaddr *)(&interface_sock),
2733 sending_ip_address = host_ntoa(-1, &interface_sock, NULL,
2736 exim_fail("exim: getsockname() failed after -MC option: %s\n",
2739 testharness_pause_ms(500);
2743 else if (*argrest == 'C' && argrest[1] && !argrest[2])
2747 /* -MCA: set the smtp_authenticated flag; this is useful only when it
2748 precedes -MC (see above). The flag indicates that the host to which
2749 Exim is connected has accepted an AUTH sequence. */
2751 case 'A': f.smtp_authenticated = TRUE; break;
2753 /* -MCD: set the smtp_use_dsn flag; this indicates that the host
2754 that exim is connected to supports the esmtp extension DSN */
2756 case 'D': smtp_peer_options |= OPTION_DSN; break;
2758 /* -MCG: set the queue name, to a non-default value */
2760 case 'G': if (++i < argc) queue_name = string_copy(argv[i]);
2764 /* -MCK: the peer offered CHUNKING. Must precede -MC */
2766 case 'K': smtp_peer_options |= OPTION_CHUNKING; break;
2768 /* -MCP: set the smtp_use_pipelining flag; this is useful only when
2769 it preceded -MC (see above) */
2771 case 'P': smtp_peer_options |= OPTION_PIPE; break;
2773 /* -MCQ: pass on the pid of the queue-running process that started
2774 this chain of deliveries and the fd of its synchronizing pipe; this
2775 is useful only when it precedes -MC (see above) */
2777 case 'Q': if (++i < argc) passed_qr_pid = (pid_t)(Uatol(argv[i]));
2779 if (++i < argc) passed_qr_pipe = (int)(Uatol(argv[i]));
2783 /* -MCS: set the smtp_use_size flag; this is useful only when it
2784 precedes -MC (see above) */
2786 case 'S': smtp_peer_options |= OPTION_SIZE; break;
2789 /* -MCt: similar to -MCT below but the connection is still open
2790 via a proxy process which handles the TLS context and coding.
2791 Require three arguments for the proxied local address and port,
2792 and the TLS cipher. */
2794 case 't': if (++i < argc) sending_ip_address = argv[i];
2796 if (++i < argc) sending_port = (int)(Uatol(argv[i]));
2798 if (++i < argc) continue_proxy_cipher = argv[i];
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)
2835 else if (*argrest == 0)
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 = argv[++i];
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 != 0) 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) sender_host_address = argv[++i];
3074 /* -oMaa: Set authenticator name */
3076 else if (Ustrcmp(argrest, "aa") == 0)
3077 sender_host_authenticated = argv[++i];
3079 /* -oMas: setting authenticated sender */
3081 else if (Ustrcmp(argrest, "as") == 0)
3082 authenticated_sender = string_copy_taint(argv[++i], TRUE);
3084 /* -oMai: setting authenticated id */
3086 else if (Ustrcmp(argrest, "ai") == 0)
3087 authenticated_id = string_copy_taint(argv[++i], TRUE);
3089 /* -oMi: Set incoming interface address */
3091 else if (Ustrcmp(argrest, "i") == 0) interface_address = argv[++i];
3093 /* -oMm: Message reference */
3095 else if (Ustrcmp(argrest, "m") == 0)
3097 if (!mac_ismsgid(argv[i+1]))
3098 exim_fail("-oMm must be a valid message ID\n");
3099 if (!f.trusted_config)
3100 exim_fail("-oMm must be called by a trusted user/config\n");
3101 message_reference = argv[++i];
3104 /* -oMr: Received protocol */
3106 else if (Ustrcmp(argrest, "r") == 0)
3108 if (received_protocol)
3109 exim_fail("received_protocol is set already\n");
3111 received_protocol = argv[++i];
3113 /* -oMs: Set sender host name */
3115 else if (Ustrcmp(argrest, "s") == 0)
3116 sender_host_name = string_copy_taint(argv[++i], TRUE);
3118 /* -oMt: Set sender ident */
3120 else if (Ustrcmp(argrest, "t") == 0)
3122 sender_ident_set = TRUE;
3123 sender_ident = argv[++i];
3126 /* Else a bad argument */
3133 /* -om: Me-too flag for aliases. Exim always does this. Some programs
3134 seem to call this as -m (undocumented), so that is also accepted (see
3136 /* -oo: An ancient flag for old-style addresses which still seems to
3137 crop up in some calls (see in SCO). */
3141 if (*argrest) badarg = TRUE;
3144 /* -oP <name>: set pid file path for daemon
3145 -oPX: delete pid file of daemon */
3148 if (!*argrest) override_pid_file_path = argv[++i];
3149 else if (Ustrcmp(argrest, "X") == 0) delete_pid_file();
3154 /* -or <n>: set timeout for non-SMTP acceptance
3155 -os <n>: set timeout for SMTP acceptance */
3160 int * tp = argrest[-1] == 'r'
3161 ? &arg_receive_timeout : &arg_smtp_receive_timeout;
3163 *tp = readconf_readtime(argrest, 0, FALSE);
3164 else if (i+1 < argc)
3165 *tp = readconf_readtime(argv[++i], 0, FALSE);
3168 exim_fail("exim: bad time value %s: abandoned\n", argv[i]);
3172 /* -oX <list>: Override local_interfaces and/or default daemon ports */
3175 if (*argrest) badarg = TRUE;
3176 else override_local_interfaces = argv[++i];
3179 /* Unknown -o argument */
3187 /* -ps: force Perl startup; -pd force delayed Perl startup */
3191 if (*argrest == 's' && argrest[1] == 0)
3193 perl_start_option = 1;
3196 if (*argrest == 'd' && argrest[1] == 0)
3198 perl_start_option = -1;
3203 /* -panythingelse is taken as the Sendmail-compatible argument -prval:sval,
3204 which sets the host protocol and host name */
3208 argrest = argv[++i];
3210 { badarg = TRUE; break; }
3216 if (received_protocol)
3217 exim_fail("received_protocol is set already\n");
3219 hn = Ustrchr(argrest, ':');
3221 received_protocol = argrest;
3224 int old_pool = store_pool;
3225 store_pool = POOL_PERM;
3226 received_protocol = string_copyn(argrest, hn - argrest);
3227 store_pool = old_pool;
3228 sender_host_name = hn + 1;
3235 receiving_message = FALSE;
3236 if (queue_interval >= 0)
3237 exim_fail("exim: -q specified more than once\n");
3239 /* -qq...: Do queue runs in a 2-stage manner */
3241 if (*argrest == 'q')
3243 f.queue_2stage = TRUE;
3247 /* -qi...: Do only first (initial) deliveries */
3249 if (*argrest == 'i')
3251 f.queue_run_first_delivery = TRUE;
3255 /* -qf...: Run the queue, forcing deliveries
3256 -qff..: Ditto, forcing thawing as well */
3258 if (*argrest == 'f')
3260 f.queue_run_force = TRUE;
3261 if (*++argrest == 'f')
3263 f.deliver_force_thaw = TRUE;
3268 /* -q[f][f]l...: Run the queue only on local deliveries */
3270 if (*argrest == 'l')
3272 f.queue_run_local = TRUE;
3276 /* -q[f][f][l][G<name>]... Work on the named queue */
3278 if (*argrest == 'G')
3281 for (argrest++, i = 0; argrest[i] && argrest[i] != '/'; ) i++;
3282 queue_name = string_copyn(argrest, i);
3284 if (*argrest == '/') argrest++;
3287 /* -q[f][f][l][G<name>]: Run the queue, optionally forced, optionally local
3288 only, optionally named, optionally starting from a given message id. */
3290 if (!(list_queue || count_queue))
3292 && (i + 1 >= argc || argv[i+1][0] == '-' || mac_ismsgid(argv[i+1])))
3295 if (i+1 < argc && mac_ismsgid(argv[i+1]))
3296 start_queue_run_id = argv[++i];
3297 if (i+1 < argc && mac_ismsgid(argv[i+1]))
3298 stop_queue_run_id = argv[++i];
3301 /* -q[f][f][l][G<name>/]<n>: Run the queue at regular intervals, optionally
3302 forced, optionally local only, optionally named. */
3304 else if ((queue_interval = readconf_readtime(*argrest ? argrest : argv[++i],
3306 exim_fail("exim: bad time value %s: abandoned\n", argv[i]);
3310 case 'R': /* Synonymous with -qR... */
3311 receiving_message = FALSE;
3313 /* -Rf: As -R (below) but force all deliveries,
3314 -Rff: Ditto, but also thaw all frozen messages,
3315 -Rr: String is regex
3316 -Rrf: Regex and force
3317 -Rrff: Regex and force and thaw
3319 in all cases provided there are no further characters in this
3323 for (int i = 0; i < nelem(rsopts); i++)
3324 if (Ustrcmp(argrest, rsopts[i]) == 0)
3326 if (i != 2) f.queue_run_force = TRUE;
3327 if (i >= 2) f.deliver_selectstring_regex = TRUE;
3328 if (i == 1 || i == 4) f.deliver_force_thaw = TRUE;
3329 argrest += Ustrlen(rsopts[i]);
3332 /* -R: Set string to match in addresses for forced queue run to
3333 pick out particular messages. */
3336 deliver_selectstring = argrest;
3337 else if (i+1 < argc)
3338 deliver_selectstring = argv[++i];
3340 exim_fail("exim: string expected after -R\n");
3344 /* -r: an obsolete synonym for -f (see above) */
3347 /* -S: Like -R but works on sender. */
3349 case 'S': /* Synonymous with -qS... */
3350 receiving_message = FALSE;
3352 /* -Sf: As -S (below) but force all deliveries,
3353 -Sff: Ditto, but also thaw all frozen messages,
3354 -Sr: String is regex
3355 -Srf: Regex and force
3356 -Srff: Regex and force and thaw
3358 in all cases provided there are no further characters in this
3362 for (int i = 0; i < nelem(rsopts); i++)
3363 if (Ustrcmp(argrest, rsopts[i]) == 0)
3365 if (i != 2) f.queue_run_force = TRUE;
3366 if (i >= 2) f.deliver_selectstring_sender_regex = TRUE;
3367 if (i == 1 || i == 4) f.deliver_force_thaw = TRUE;
3368 argrest += Ustrlen(rsopts[i]);
3371 /* -S: Set string to match in addresses for forced queue run to
3372 pick out particular messages. */
3375 deliver_selectstring_sender = argrest;
3376 else if (i+1 < argc)
3377 deliver_selectstring_sender = argv[++i];
3379 exim_fail("exim: string expected after -S\n");
3382 /* -Tqt is an option that is exclusively for use by the testing suite.
3383 It is not recognized in other circumstances. It allows for the setting up
3384 of explicit "queue times" so that various warning/retry things can be
3385 tested. Otherwise variability of clock ticks etc. cause problems. */
3388 if (f.running_in_test_harness && Ustrcmp(argrest, "qt") == 0)
3389 fudged_queue_times = argv[++i];
3394 /* -t: Set flag to extract recipients from body of message. */
3397 if (*argrest == 0) extract_recipients = TRUE;
3399 /* -ti: Set flag to extract recipients from body of message, and also
3400 specify that dot does not end the message. */
3402 else if (Ustrcmp(argrest, "i") == 0)
3404 extract_recipients = TRUE;
3408 /* -tls-on-connect: don't wait for STARTTLS (for old clients) */
3411 else if (Ustrcmp(argrest, "ls-on-connect") == 0) tls_in.on_connect = TRUE;
3418 /* -U: This means "initial user submission" in sendmail, apparently. The
3419 doc claims that in future sendmail may refuse syntactically invalid
3420 messages instead of fixing them. For the moment, we just ignore it. */
3426 /* -v: verify things - this is a very low-level debugging */
3431 debug_selector |= D_v;
3432 debug_file = stderr;
3438 /* -x: AIX uses this to indicate some fancy 8-bit character stuff:
3440 The -x flag tells the sendmail command that mail from a local
3441 mail program has National Language Support (NLS) extended characters
3442 in the body of the mail item. The sendmail command can send mail with
3443 extended NLS characters across networks that normally corrupts these
3446 As Exim is 8-bit clean, it just ignores this flag. */
3449 if (*argrest != 0) badarg = TRUE;
3452 /* -X: in sendmail: takes one parameter, logfile, and sends debugging
3453 logs to that file. We swallow the parameter and otherwise ignore it. */
3456 if (*argrest == '\0')
3458 exim_fail("exim: string expected after -X\n");
3462 if (*argrest == '\0')
3464 log_oneline = argv[i];
3466 exim_fail("exim: file name expected after %s\n", argv[i-1]);
3469 /* All other initial characters are errors */
3474 } /* End of high-level switch statement */
3476 /* Failed to recognize the option, or syntax error */
3479 exim_fail("exim abandoned: unknown, malformed, or incomplete "
3480 "option %s\n", arg);
3484 /* If -R or -S have been specified without -q, assume a single queue run. */
3486 if ( (deliver_selectstring || deliver_selectstring_sender)
3487 && queue_interval < 0)
3492 /* If usage_wanted is set we call the usage function - which never returns */
3493 if (usage_wanted) exim_usage(called_as);
3495 /* Arguments have been processed. Check for incompatibilities. */
3497 (smtp_input || extract_recipients || recipients_arg < argc) &&
3498 (f.daemon_listen || queue_interval >= 0 || bi_option ||
3499 test_retry_arg >= 0 || test_rewrite_arg >= 0 ||
3500 filter_test != FTEST_NONE || (msg_action_arg > 0 && !one_msg_action))
3503 msg_action_arg > 0 &&
3504 (f.daemon_listen || queue_interval > 0 || list_options ||
3505 (checking && msg_action != MSG_LOAD) ||
3506 bi_option || test_retry_arg >= 0 || test_rewrite_arg >= 0)
3509 (f.daemon_listen || queue_interval > 0) &&
3510 (sender_address != NULL || list_options || list_queue || checking ||
3514 f.daemon_listen && queue_interval == 0
3517 f.inetd_wait_mode && queue_interval >= 0
3521 (checking || smtp_input || extract_recipients ||
3522 filter_test != FTEST_NONE || bi_option)
3525 verify_address_mode &&
3526 (f.address_test_mode || smtp_input || extract_recipients ||
3527 filter_test != FTEST_NONE || bi_option)
3530 f.address_test_mode && (smtp_input || extract_recipients ||
3531 filter_test != FTEST_NONE || bi_option)
3534 smtp_input && (sender_address != NULL || filter_test != FTEST_NONE ||
3538 deliver_selectstring != NULL && queue_interval < 0
3541 msg_action == MSG_LOAD &&
3542 (!expansion_test || expansion_test_message != NULL)
3545 exim_fail("exim: incompatible command-line options or arguments\n");
3547 /* If debugging is set up, set the file and the file descriptor to pass on to
3548 child processes. It should, of course, be 2 for stderr. Also, force the daemon
3549 to run in the foreground. */
3551 if (debug_selector != 0)
3553 debug_file = stderr;
3554 debug_fd = fileno(debug_file);
3555 f.background_daemon = FALSE;
3556 testharness_pause_ms(100); /* lets caller finish */
3557 if (debug_selector != D_v) /* -v only doesn't show this */
3559 debug_printf("Exim version %s uid=%ld gid=%ld pid=%d D=%x\n",
3560 version_string, (long int)real_uid, (long int)real_gid, (int)getpid(),
3562 if (!version_printed)
3563 show_whats_supported(stderr);
3567 /* When started with root privilege, ensure that the limits on the number of
3568 open files and the number of processes (where that is accessible) are
3569 sufficiently large, or are unset, in case Exim has been called from an
3570 environment where the limits are screwed down. Not all OS have the ability to
3571 change some of these limits. */
3575 DEBUG(D_any) debug_print_ids(US"Exim has no root privilege:");
3581 #ifdef RLIMIT_NOFILE
3582 if (getrlimit(RLIMIT_NOFILE, &rlp) < 0)
3584 log_write(0, LOG_MAIN|LOG_PANIC, "getrlimit(RLIMIT_NOFILE) failed: %s",
3586 rlp.rlim_cur = rlp.rlim_max = 0;
3589 /* I originally chose 1000 as a nice big number that was unlikely to
3590 be exceeded. It turns out that some older OS have a fixed upper limit of
3593 if (rlp.rlim_cur < 1000)
3595 rlp.rlim_cur = rlp.rlim_max = 1000;
3596 if (setrlimit(RLIMIT_NOFILE, &rlp) < 0)
3598 rlp.rlim_cur = rlp.rlim_max = 256;
3599 if (setrlimit(RLIMIT_NOFILE, &rlp) < 0)
3600 log_write(0, LOG_MAIN|LOG_PANIC, "setrlimit(RLIMIT_NOFILE) failed: %s",
3607 if (getrlimit(RLIMIT_NPROC, &rlp) < 0)
3609 log_write(0, LOG_MAIN|LOG_PANIC, "getrlimit(RLIMIT_NPROC) failed: %s",
3611 rlp.rlim_cur = rlp.rlim_max = 0;
3614 #ifdef RLIM_INFINITY
3615 if (rlp.rlim_cur != RLIM_INFINITY && rlp.rlim_cur < 1000)
3617 rlp.rlim_cur = rlp.rlim_max = RLIM_INFINITY;
3619 if (rlp.rlim_cur < 1000)
3621 rlp.rlim_cur = rlp.rlim_max = 1000;
3623 if (setrlimit(RLIMIT_NPROC, &rlp) < 0)
3624 log_write(0, LOG_MAIN|LOG_PANIC, "setrlimit(RLIMIT_NPROC) failed: %s",
3630 /* Exim is normally entered as root (but some special configurations are
3631 possible that don't do this). However, it always spins off sub-processes that
3632 set their uid and gid as required for local delivery. We don't want to pass on
3633 any extra groups that root may belong to, so we want to get rid of them all at
3636 We need to obey setgroups() at this stage, before possibly giving up root
3637 privilege for a changed configuration file, but later on we might need to
3638 check on the additional groups for the admin user privilege - can't do that
3639 till after reading the config, which might specify the exim gid. Therefore,
3640 save the group list here first. */
3642 if ((group_count = getgroups(nelem(group_list), group_list)) < 0)
3643 exim_fail("exim: getgroups() failed: %s\n", strerror(errno));
3645 /* There is a fundamental difference in some BSD systems in the matter of
3646 groups. FreeBSD and BSDI are known to be different; NetBSD and OpenBSD are
3647 known not to be different. On the "different" systems there is a single group
3648 list, and the first entry in it is the current group. On all other versions of
3649 Unix there is a supplementary group list, which is in *addition* to the current
3650 group. Consequently, to get rid of all extraneous groups on a "standard" system
3651 you pass over 0 groups to setgroups(), while on a "different" system you pass
3652 over a single group - the current group, which is always the first group in the
3653 list. Calling setgroups() with zero groups on a "different" system results in
3654 an error return. The following code should cope with both types of system.
3656 Unfortunately, recent MacOS, which should be a FreeBSD, "helpfully" succeeds
3657 the "setgroups() with zero groups" - and changes the egid.
3658 Thanks to that we had to stash the original_egid above, for use below
3659 in the call to exim_setugid().
3661 However, if this process isn't running as root, setgroups() can't be used
3662 since you have to be root to run it, even if throwing away groups.
3663 Except, sigh, for Hurd - where you can.
3664 Not being root here happens only in some unusual configurations. */
3667 #ifndef OS_SETGROUPS_ZERO_DROPS_ALL
3668 && setgroups(0, NULL) != 0
3670 && setgroups(1, group_list) != 0)
3671 exim_fail("exim: setgroups() failed: %s\n", strerror(errno));
3673 /* If the configuration file name has been altered by an argument on the
3674 command line (either a new file name or a macro definition) and the caller is
3675 not root, or if this is a filter testing run, remove any setuid privilege the
3676 program has and run as the underlying user.
3678 The exim user is locked out of this, which severely restricts the use of -C
3681 Otherwise, set the real ids to the effective values (should be root unless run
3682 from inetd, which it can either be root or the exim uid, if one is configured).
3684 There is a private mechanism for bypassing some of this, in order to make it
3685 possible to test lots of configurations automatically, without having either to
3686 recompile each time, or to patch in an actual configuration file name and other
3687 values (such as the path name). If running in the test harness, pretend that
3688 configuration file changes and macro definitions haven't happened. */
3691 (!f.trusted_config || /* Config changed, or */
3692 !macros_trusted(opt_D_used)) && /* impermissible macros and */
3693 real_uid != root_uid && /* Not root, and */
3694 !f.running_in_test_harness /* Not fudged */
3696 expansion_test /* expansion testing */
3698 filter_test != FTEST_NONE) /* Filter testing */
3700 setgroups(group_count, group_list);
3701 exim_setugid(real_uid, real_gid, FALSE,
3702 US"-C, -D, -be or -bf forces real uid");
3703 removed_privilege = TRUE;
3705 /* In the normal case when Exim is called like this, stderr is available
3706 and should be used for any logging information because attempts to write
3707 to the log will usually fail. To arrange this, we unset really_exim. However,
3708 if no stderr is available there is no point - we might as well have a go
3709 at the log (if it fails, syslog will be written).
3711 Note that if the invoker is Exim, the logs remain available. Messing with
3712 this causes unlogged successful deliveries. */
3714 if (log_stderr && real_uid != exim_uid)
3715 f.really_exim = FALSE;
3718 /* Privilege is to be retained for the moment. It may be dropped later,
3719 depending on the job that this Exim process has been asked to do. For now, set
3720 the real uid to the effective so that subsequent re-execs of Exim are done by a
3724 exim_setugid(geteuid(), original_egid, FALSE, US"forcing real = effective");
3726 /* If testing a filter, open the file(s) now, before wasting time doing other
3727 setups and reading the message. */
3729 if (filter_test & FTEST_SYSTEM)
3730 if ((filter_sfd = Uopen(filter_test_sfile, O_RDONLY, 0)) < 0)
3731 exim_fail("exim: failed to open %s: %s\n", filter_test_sfile,
3734 if (filter_test & FTEST_USER)
3735 if ((filter_ufd = Uopen(filter_test_ufile, O_RDONLY, 0)) < 0)
3736 exim_fail("exim: failed to open %s: %s\n", filter_test_ufile,
3739 /* Initialise lookup_list
3740 If debugging, already called above via version reporting.
3741 In either case, we initialise the list of available lookups while running
3742 as root. All dynamically modules are loaded from a directory which is
3743 hard-coded into the binary and is code which, if not a module, would be
3744 part of Exim already. Ability to modify the content of the directory
3745 is equivalent to the ability to modify a setuid binary!
3747 This needs to happen before we read the main configuration. */
3751 if (f.running_in_test_harness) smtputf8_advertise_hosts = NULL;
3754 /* Read the main runtime configuration data; this gives up if there
3755 is a failure. It leaves the configuration file open so that the subsequent
3756 configuration data for delivery can be read if needed.
3758 NOTE: immediately after opening the configuration file we change the working
3759 directory to "/"! Later we change to $spool_directory. We do it there, because
3760 during readconf_main() some expansion takes place already. */
3762 /* Store the initial cwd before we change directories. Can be NULL if the
3763 dir has already been unlinked. */
3764 initial_cwd = os_getcwd(NULL, 0);
3767 -be[m] expansion test -
3768 -b[fF] filter test new
3770 -bmalware malware_test_file new
3772 -brw rewrite test new
3774 -bv[s] address verify -
3776 -bP <option> (except -bP config, which sets list_config)
3778 If any of these options is set, we suppress warnings about configuration
3779 issues (currently about tls_advertise_hosts and keep_environment not being
3783 #ifdef MEASURE_TIMING
3784 struct timeval t0, diff;
3785 (void)gettimeofday(&t0, NULL);
3788 readconf_main(checking || list_options);
3790 #ifdef MEASURE_TIMING
3791 report_time_since(&t0, US"readconf_main (delta)");
3796 /* Now in directory "/" */
3798 if (cleanup_environment() == FALSE)
3799 log_write(0, LOG_PANIC_DIE, "Can't cleanup environment");
3802 /* If an action on specific messages is requested, or if a daemon or queue
3803 runner is being started, we need to know if Exim was called by an admin user.
3804 This is the case if the real user is root or exim, or if the real group is
3805 exim, or if one of the supplementary groups is exim or a group listed in
3806 admin_groups. We don't fail all message actions immediately if not admin_user,
3807 since some actions can be performed by non-admin users. Instead, set admin_user
3808 for later interrogation. */
3810 if (real_uid == root_uid || real_uid == exim_uid || real_gid == exim_gid)
3811 f.admin_user = TRUE;
3813 for (int i = 0; i < group_count && !f.admin_user; i++)
3814 if (group_list[i] == exim_gid)
3815 f.admin_user = TRUE;
3816 else if (admin_groups)
3817 for (int j = 1; j <= (int)admin_groups[0] && !f.admin_user; j++)
3818 if (admin_groups[j] == group_list[i])
3819 f.admin_user = TRUE;
3821 /* Another group of privileged users are the trusted users. These are root,
3822 exim, and any caller matching trusted_users or trusted_groups. Trusted callers
3823 are permitted to specify sender_addresses with -f on the command line, and
3824 other message parameters as well. */
3826 if (real_uid == root_uid || real_uid == exim_uid)
3827 f.trusted_caller = TRUE;
3831 for (int i = 1; i <= (int)trusted_users[0] && !f.trusted_caller; i++)
3832 if (trusted_users[i] == real_uid)
3833 f.trusted_caller = TRUE;
3836 for (int i = 1; i <= (int)trusted_groups[0] && !f.trusted_caller; i++)
3837 if (trusted_groups[i] == real_gid)
3838 f.trusted_caller = TRUE;
3839 else for (int j = 0; j < group_count && !f.trusted_caller; j++)
3840 if (trusted_groups[i] == group_list[j])
3841 f.trusted_caller = TRUE;
3844 /* At this point, we know if the user is privileged and some command-line
3845 options become possibly impermissible, depending upon the configuration file. */
3847 if (checking && commandline_checks_require_admin && !f.admin_user)
3848 exim_fail("exim: those command-line flags are set to require admin\n");
3850 /* Handle the decoding of logging options. */
3852 decode_bits(log_selector, log_selector_size, log_notall,
3853 log_selector_string, log_options, log_options_count, US"log", 0);
3857 debug_printf("configuration file is %s\n", config_main_filename);
3858 debug_printf("log selectors =");
3859 for (int i = 0; i < log_selector_size; i++)
3860 debug_printf(" %08x", log_selector[i]);
3864 /* If domain literals are not allowed, check the sender address that was
3865 supplied with -f. Ditto for a stripped trailing dot. */
3869 if (sender_address[sender_address_domain] == '[' && !allow_domain_literals)
3870 exim_fail("exim: bad -f address \"%s\": domain literals not "
3871 "allowed\n", sender_address);
3872 if (f_end_dot && !strip_trailing_dot)
3873 exim_fail("exim: bad -f address \"%s.\": domain is malformed "
3874 "(trailing dot not allowed)\n", sender_address);
3877 /* See if an admin user overrode our logging. */
3879 if (cmdline_syslog_name)
3882 syslog_processname = cmdline_syslog_name;
3883 log_file_path = string_copy(CUS"syslog");
3886 /* not a panic, non-privileged users should not be able to spam paniclog */
3888 "exim: you lack sufficient privilege to specify syslog process name\n");
3890 /* Paranoia check of maximum lengths of certain strings. There is a check
3891 on the length of the log file path in log.c, which will come into effect
3892 if there are any calls to write the log earlier than this. However, if we
3893 get this far but the string is very long, it is better to stop now than to
3894 carry on and (e.g.) receive a message and then have to collapse. The call to
3895 log_write() from here will cause the ultimate panic collapse if the complete
3896 file name exceeds the buffer length. */
3898 if (Ustrlen(log_file_path) > 200)
3899 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3900 "log_file_path is longer than 200 chars: aborting");
3902 if (Ustrlen(pid_file_path) > 200)
3903 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3904 "pid_file_path is longer than 200 chars: aborting");
3906 if (Ustrlen(spool_directory) > 200)
3907 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3908 "spool_directory is longer than 200 chars: aborting");
3910 /* Length check on the process name given to syslog for its TAG field,
3911 which is only permitted to be 32 characters or less. See RFC 3164. */
3913 if (Ustrlen(syslog_processname) > 32)
3914 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3915 "syslog_processname is longer than 32 chars: aborting");
3920 log_write(0, LOG_MAIN, "%s", log_oneline);
3921 return EXIT_SUCCESS;
3924 return EXIT_FAILURE;
3926 /* In some operating systems, the environment variable TMPDIR controls where
3927 temporary files are created; Exim doesn't use these (apart from when delivering
3928 to MBX mailboxes), but called libraries such as DBM libraries may require them.
3929 If TMPDIR is found in the environment, reset it to the value defined in the
3930 EXIM_TMPDIR macro, if this macro is defined. For backward compatibility this
3931 macro may be called TMPDIR in old "Local/Makefile"s. It's converted to
3932 EXIM_TMPDIR by the build scripts.
3936 if (environ) for (uschar ** p = USS environ; *p; p++)
3937 if (Ustrncmp(*p, "TMPDIR=", 7) == 0 && Ustrcmp(*p+7, EXIM_TMPDIR) != 0)
3939 uschar * newp = store_malloc(Ustrlen(EXIM_TMPDIR) + 8);
3940 sprintf(CS newp, "TMPDIR=%s", EXIM_TMPDIR);
3942 DEBUG(D_any) debug_printf("reset TMPDIR=%s in environment\n", EXIM_TMPDIR);
3946 /* Timezone handling. If timezone_string is "utc", set a flag to cause all
3947 timestamps to be in UTC (gmtime() is used instead of localtime()). Otherwise,
3948 we may need to get rid of a bogus timezone setting. This can arise when Exim is
3949 called by a user who has set the TZ variable. This then affects the timestamps
3950 in log files and in Received: headers, and any created Date: header lines. The
3951 required timezone is settable in the configuration file, so nothing can be done
3952 about this earlier - but hopefully nothing will normally be logged earlier than
3953 this. We have to make a new environment if TZ is wrong, but don't bother if
3954 timestamps_utc is set, because then all times are in UTC anyway. */
3956 if (timezone_string && strcmpic(timezone_string, US"UTC") == 0)
3957 f.timestamps_utc = TRUE;
3960 uschar *envtz = US getenv("TZ");
3962 ? !timezone_string || Ustrcmp(timezone_string, envtz) != 0
3963 : timezone_string != NULL
3966 uschar **p = USS environ;
3970 if (environ) while (*p++) count++;
3971 if (!envtz) count++;
3972 newp = new = store_malloc(sizeof(uschar *) * (count + 1));
3973 if (environ) for (p = USS environ; *p; p++)
3974 if (Ustrncmp(*p, "TZ=", 3) != 0) *newp++ = *p;
3975 if (timezone_string)
3977 *newp = store_malloc(Ustrlen(timezone_string) + 4);
3978 sprintf(CS *newp++, "TZ=%s", timezone_string);
3983 DEBUG(D_any) debug_printf("Reset TZ to %s: time is %s\n", timezone_string,
3984 tod_stamp(tod_log));
3988 /* Handle the case when we have removed the setuid privilege because of -C or
3989 -D. This means that the caller of Exim was not root.
3991 There is a problem if we were running as the Exim user. The sysadmin may
3992 expect this case to retain privilege because "the binary was called by the
3993 Exim user", but it hasn't, because either the -D option set macros, or the
3994 -C option set a non-trusted configuration file. There are two possibilities:
3996 (1) If deliver_drop_privilege is set, Exim is not going to re-exec in order
3997 to do message deliveries. Thus, the fact that it is running as a
3998 non-privileged user is plausible, and might be wanted in some special
3999 configurations. However, really_exim will have been set false when
4000 privilege was dropped, to stop Exim trying to write to its normal log
4001 files. Therefore, re-enable normal log processing, assuming the sysadmin
4002 has set up the log directory correctly.
4004 (2) If deliver_drop_privilege is not set, the configuration won't work as
4005 apparently intended, and so we log a panic message. In order to retain
4006 root for -C or -D, the caller must either be root or be invoking a
4007 trusted configuration file (when deliver_drop_privilege is false). */
4009 if ( removed_privilege
4010 && (!f.trusted_config || opt_D_used)
4011 && real_uid == exim_uid)
4012 if (deliver_drop_privilege)
4013 f.really_exim = TRUE; /* let logging work normally */
4015 log_write(0, LOG_MAIN|LOG_PANIC,
4016 "exim user lost privilege for using %s option",
4017 f.trusted_config? "-D" : "-C");
4019 /* Start up Perl interpreter if Perl support is configured and there is a
4020 perl_startup option, and the configuration or the command line specifies
4021 initializing starting. Note that the global variables are actually called
4022 opt_perl_xxx to avoid clashing with perl's namespace (perl_*). */
4025 if (perl_start_option != 0)
4026 opt_perl_at_start = (perl_start_option > 0);
4027 if (opt_perl_at_start && opt_perl_startup != NULL)
4030 DEBUG(D_any) debug_printf("Starting Perl interpreter\n");
4031 if ((errstr = init_perl(opt_perl_startup)))
4032 exim_fail("exim: error in perl_startup code: %s\n", errstr);
4033 opt_perl_started = TRUE;
4035 #endif /* EXIM_PERL */
4037 /* Log the arguments of the call if the configuration file said so. This is
4038 a debugging feature for finding out what arguments certain MUAs actually use.
4039 Don't attempt it if logging is disabled, or if listing variables or if
4040 verifying/testing addresses or expansions. */
4042 if ( (debug_selector & D_any || LOGGING(arguments))
4043 && f.really_exim && !list_options && !checking)
4045 uschar *p = big_buffer;
4046 Ustrcpy(p, US"cwd= (failed)");
4052 Ustrncpy(p + 4, initial_cwd, big_buffer_size-5);
4053 p += 4 + Ustrlen(initial_cwd);
4054 /* in case p is near the end and we don't provide enough space for
4055 * string_format to be willing to write. */
4059 (void)string_format(p, big_buffer_size - (p - big_buffer), " %d args:", argc);
4061 for (int i = 0; i < argc; i++)
4063 int len = Ustrlen(argv[i]);
4064 const uschar *printing;
4066 if (p + len + 8 >= big_buffer + big_buffer_size)
4068 Ustrcpy(p, US" ...");
4069 log_write(0, LOG_MAIN, "%s", big_buffer);
4070 Ustrcpy(big_buffer, US"...");
4073 printing = string_printing(argv[i]);
4074 if (printing[0] == 0) quote = US"\""; else
4076 const uschar *pp = printing;
4078 while (*pp != 0) 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);
4114 if (bi_command != NULL)
4118 argv[i++] = bi_command;
4119 if (alias_arg != NULL) 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] == NULL)? US"" : argv[1]);
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, US"main");
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, US"main");
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, US"main");
4569 set_process_info("listing config");
4570 exim_exit(readconf_print(US"config", NULL, flag_n)
4571 ? EXIT_SUCCESS : EXIT_FAILURE, US"main");
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, US"main");
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++)
4606 (void)deliver_message(argv[i], forced_delivery, deliver_give_up);
4607 else if ((pid = fork()) == 0)
4609 (void)deliver_message(argv[i], forced_delivery, deliver_give_up);
4610 exim_underbar_exit(EXIT_SUCCESS);
4614 fprintf(stderr, "failed to fork delivery process for %s: %s\n", argv[i],
4616 exim_exit(EXIT_FAILURE, US"main");
4620 exim_exit(EXIT_SUCCESS, US"main");
4624 /* If only a single queue run is requested, without SMTP listening, we can just
4625 turn into a queue runner, with an optional starting message id. */
4627 if (queue_interval == 0 && !f.daemon_listen)
4629 DEBUG(D_queue_run) debug_printf("Single queue run%s%s%s%s\n",
4630 start_queue_run_id ? US" starting at " : US"",
4631 start_queue_run_id ? start_queue_run_id: US"",
4632 stop_queue_run_id ? US" stopping at " : US"",
4633 stop_queue_run_id ? stop_queue_run_id : US"");
4635 set_process_info("running the '%s' queue (single queue run)", queue_name);
4637 set_process_info("running the queue (single queue run)");
4638 queue_run(start_queue_run_id, stop_queue_run_id, FALSE);
4639 exim_exit(EXIT_SUCCESS, US"main");
4643 /* Find the login name of the real user running this process. This is always
4644 needed when receiving a message, because it is written into the spool file. It
4645 may also be used to construct a from: or a sender: header, and in this case we
4646 need the user's full name as well, so save a copy of it, checked for RFC822
4647 syntax and munged if necessary, if it hasn't previously been set by the -F
4648 argument. We may try to get the passwd entry more than once, in case NIS or
4649 other delays are in evidence. Save the home directory for use in filter testing
4654 if ((pw = getpwuid(real_uid)) != NULL)
4656 originator_login = string_copy(US pw->pw_name);
4657 originator_home = string_copy(US pw->pw_dir);
4659 /* If user name has not been set by -F, set it from the passwd entry
4660 unless -f has been used to set the sender address by a trusted user. */
4662 if (!originator_name)
4664 if (!sender_address || (!f.trusted_caller && filter_test == FTEST_NONE))
4666 uschar *name = US pw->pw_gecos;
4667 uschar *amp = Ustrchr(name, '&');
4670 /* Most Unix specify that a '&' character in the gecos field is
4671 replaced by a copy of the login name, and some even specify that
4672 the first character should be upper cased, so that's what we do. */
4677 string_format(buffer, sizeof(buffer), "%.*s%n%s%s",
4678 (int)(amp - name), name, &loffset, originator_login, amp + 1);
4679 buffer[loffset] = toupper(buffer[loffset]);
4683 /* If a pattern for matching the gecos field was supplied, apply
4684 it and then expand the name string. */
4686 if (gecos_pattern && gecos_name)
4689 re = regex_must_compile(gecos_pattern, FALSE, TRUE); /* Use malloc */
4691 if (regex_match_and_setup(re, name, 0, -1))
4693 uschar *new_name = expand_string(gecos_name);
4697 DEBUG(D_receive) debug_printf("user name \"%s\" extracted from "
4698 "gecos field \"%s\"\n", new_name, name);
4701 else DEBUG(D_receive) debug_printf("failed to expand gecos_name string "
4702 "\"%s\": %s\n", gecos_name, expand_string_message);
4704 else DEBUG(D_receive) debug_printf("gecos_pattern \"%s\" did not match "
4705 "gecos field \"%s\"\n", gecos_pattern, name);
4706 store_free((void *)re);
4708 originator_name = string_copy(name);
4711 /* A trusted caller has used -f but not -F */
4713 else originator_name = US"";
4716 /* Break the retry loop */
4721 if (++i > finduser_retries) break;
4725 /* If we cannot get a user login, log the incident and give up, unless the
4726 configuration specifies something to use. When running in the test harness,
4727 any setting of unknown_login overrides the actual name. */
4729 if (originator_login == NULL || f.running_in_test_harness)
4731 if (unknown_login != NULL)
4733 originator_login = expand_string(unknown_login);
4734 if (originator_name == NULL && unknown_username != NULL)
4735 originator_name = expand_string(unknown_username);
4736 if (originator_name == NULL) originator_name = US"";
4738 if (originator_login == NULL)
4739 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Failed to get user name for uid %d",
4743 /* Ensure that the user name is in a suitable form for use as a "phrase" in an
4746 originator_name = string_copy(parse_fix_phrase(originator_name,
4747 Ustrlen(originator_name), big_buffer, big_buffer_size));
4749 /* If a message is created by this call of Exim, the uid/gid of its originator
4750 are those of the caller. These values are overridden if an existing message is
4751 read in from the spool. */
4753 originator_uid = real_uid;
4754 originator_gid = real_gid;
4756 DEBUG(D_receive) debug_printf("originator: uid=%d gid=%d login=%s name=%s\n",
4757 (int)originator_uid, (int)originator_gid, originator_login, originator_name);
4759 /* Run in daemon and/or queue-running mode. The function daemon_go() never
4760 returns. We leave this till here so that the originator_ fields are available
4761 for incoming messages via the daemon. The daemon cannot be run in mua_wrapper
4764 if (f.daemon_listen || f.inetd_wait_mode || queue_interval > 0)
4768 fprintf(stderr, "Daemon cannot be run when mua_wrapper is set\n");
4769 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Daemon cannot be run when "
4770 "mua_wrapper is set");
4773 # ifndef DISABLE_TLS
4774 /* This also checks that the library linkage is working and we can call
4775 routines in it, so call even if tls_require_ciphers is unset */
4777 # ifdef MEASURE_TIMING
4778 struct timeval t0, diff;
4779 (void)gettimeofday(&t0, NULL);
4781 if (!tls_dropprivs_validate_require_cipher(FALSE))
4783 # ifdef MEASURE_TIMING
4784 report_time_since(&t0, US"validate_ciphers (delta)");
4792 /* If the sender ident has not been set (by a trusted caller) set it to
4793 the caller. This will get overwritten below for an inetd call. If a trusted
4794 caller has set it empty, unset it. */
4796 if (!sender_ident) sender_ident = originator_login;
4797 else if (!*sender_ident) sender_ident = NULL;
4799 /* Handle the -brw option, which is for checking out rewriting rules. Cause log
4800 writes (on errors) to go to stderr instead. Can't do this earlier, as want the
4801 originator_* variables set. */
4803 if (test_rewrite_arg >= 0)
4805 f.really_exim = FALSE;
4806 if (test_rewrite_arg >= argc)
4808 printf("-brw needs an address argument\n");
4809 exim_exit(EXIT_FAILURE, US"main");
4811 rewrite_test(argv[test_rewrite_arg]);
4812 exim_exit(EXIT_SUCCESS, US"main");
4815 /* A locally-supplied message is considered to be coming from a local user
4816 unless a trusted caller supplies a sender address with -f, or is passing in the
4817 message via SMTP (inetd invocation or otherwise). */
4819 if ( !sender_address && !smtp_input
4820 || !f.trusted_caller && filter_test == FTEST_NONE)
4822 f.sender_local = TRUE;
4824 /* A trusted caller can supply authenticated_sender and authenticated_id
4825 via -oMas and -oMai and if so, they will already be set. Otherwise, force
4826 defaults except when host checking. */
4828 if (!authenticated_sender && !host_checking)
4829 authenticated_sender = string_sprintf("%s@%s", originator_login,
4830 qualify_domain_sender);
4831 if (!authenticated_id && !host_checking)
4832 authenticated_id = originator_login;
4835 /* Trusted callers are always permitted to specify the sender address.
4836 Untrusted callers may specify it if it matches untrusted_set_sender, or if what
4837 is specified is the empty address. However, if a trusted caller does not
4838 specify a sender address for SMTP input, we leave sender_address unset. This
4839 causes the MAIL commands to be honoured. */
4841 if ( !smtp_input && !sender_address
4842 || !receive_check_set_sender(sender_address))
4844 /* Either the caller is not permitted to set a general sender, or this is
4845 non-SMTP input and the trusted caller has not set a sender. If there is no
4846 sender, or if a sender other than <> is set, override with the originator's
4847 login (which will get qualified below), except when checking things. */
4849 if (sender_address == NULL /* No sender_address set */
4851 (sender_address[0] != 0 && /* Non-empty sender address, AND */
4852 !checking)) /* Not running tests, including filter tests */
4854 sender_address = originator_login;
4855 f.sender_address_forced = FALSE;
4856 sender_address_domain = 0;
4860 /* Remember whether an untrusted caller set the sender address */
4862 f.sender_set_untrusted = sender_address != originator_login && !f.trusted_caller;
4864 /* Ensure that the sender address is fully qualified unless it is the empty
4865 address, which indicates an error message, or doesn't exist (root caller, smtp
4866 interface, no -f argument). */
4868 if (sender_address && *sender_address && sender_address_domain == 0)
4869 sender_address = string_sprintf("%s@%s", local_part_quote(sender_address),
4870 qualify_domain_sender);
4872 DEBUG(D_receive) debug_printf("sender address = %s\n", sender_address);
4874 /* Handle a request to verify a list of addresses, or test them for delivery.
4875 This must follow the setting of the sender address, since routers can be
4876 predicated upon the sender. If no arguments are given, read addresses from
4877 stdin. Set debug_level to at least D_v to get full output for address testing.
4880 if (verify_address_mode || f.address_test_mode)
4883 int flags = vopt_qualify;
4885 if (verify_address_mode)
4887 if (!verify_as_sender) flags |= vopt_is_recipient;
4888 DEBUG(D_verify) debug_print_ids(US"Verifying:");
4893 flags |= vopt_is_recipient;
4894 debug_selector |= D_v;
4895 debug_file = stderr;
4896 debug_fd = fileno(debug_file);
4897 DEBUG(D_verify) debug_print_ids(US"Address testing:");
4900 if (recipients_arg < argc)
4902 while (recipients_arg < argc)
4904 /* Supplied addresses are tainted since they come from a user */
4905 uschar * s = string_copy_taint(argv[recipients_arg++], TRUE);
4908 BOOL finished = FALSE;
4909 uschar *ss = parse_find_address_end(s, FALSE);
4910 if (*ss == ',') *ss = 0; else finished = TRUE;
4911 test_address(s, flags, &exit_value);
4914 while (*++s == ',' || isspace(*s)) ;
4921 uschar * s = get_stdinput(NULL, NULL);
4923 test_address(string_copy_taint(s, TRUE), flags, &exit_value);
4927 exim_exit(exit_value, US"main");
4930 /* Handle expansion checking. Either expand items on the command line, or read
4931 from stdin if there aren't any. If -Mset was specified, load the message so
4932 that its variables can be used, but restrict this facility to admin users.
4933 Otherwise, if -bem was used, read a message from stdin. */
4937 dns_init(FALSE, FALSE, FALSE);
4938 if (msg_action_arg > 0 && msg_action == MSG_LOAD)
4940 uschar spoolname[256]; /* Not big_buffer; used in spool_read_header() */
4942 exim_fail("exim: permission denied\n");
4943 message_id = argv[msg_action_arg];
4944 (void)string_format(spoolname, sizeof(spoolname), "%s-H", message_id);
4945 if ((deliver_datafile = spool_open_datafile(message_id)) < 0)
4946 printf ("Failed to load message datafile %s\n", message_id);
4947 if (spool_read_header(spoolname, TRUE, FALSE) != spool_read_OK)
4948 printf ("Failed to load message %s\n", message_id);
4951 /* Read a test message from a file. We fudge it up to be on stdin, saving
4952 stdin itself for later reading of expansion strings. */
4954 else if (expansion_test_message)
4956 int save_stdin = dup(0);
4957 int fd = Uopen(expansion_test_message, O_RDONLY, 0);
4959 exim_fail("exim: failed to open %s: %s\n", expansion_test_message,
4962 filter_test = FTEST_USER; /* Fudge to make it look like filter test */
4963 message_ended = END_NOTENDED;
4964 read_message_body(receive_msg(extract_recipients));
4965 message_linecount += body_linecount;
4966 (void)dup2(save_stdin, 0);
4967 (void)close(save_stdin);
4968 clearerr(stdin); /* Required by Darwin */
4971 /* Only admin users may see config-file macros this way */
4973 if (!f.admin_user) macros_user = macros = mlast = NULL;
4975 /* Allow $recipients for this testing */
4977 f.enable_dollar_recipients = TRUE;
4979 /* Expand command line items */
4981 if (recipients_arg < argc)
4982 while (recipients_arg < argc)
4983 expansion_test_line(argv[recipients_arg++]);
4989 char *(*fn_readline)(const char *) = NULL;
4990 void (*fn_addhist)(const char *) = NULL;
4994 void *dlhandle = set_readline(&fn_readline, &fn_addhist);
4997 while (s = get_stdinput(fn_readline, fn_addhist))
4998 expansion_test_line(s);
5001 if (dlhandle) dlclose(dlhandle);
5005 /* The data file will be open after -Mset */
5007 if (deliver_datafile >= 0)
5009 (void)close(deliver_datafile);
5010 deliver_datafile = -1;
5013 exim_exit(EXIT_SUCCESS, US"main: expansion test");
5017 /* The active host name is normally the primary host name, but it can be varied
5018 for hosts that want to play several parts at once. We need to ensure that it is
5019 set for host checking, and for receiving messages. */
5021 smtp_active_hostname = primary_hostname;
5022 if (raw_active_hostname != NULL)
5024 uschar *nah = expand_string(raw_active_hostname);
5027 if (!f.expand_string_forcedfail)
5028 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to expand \"%s\" "
5029 "(smtp_active_hostname): %s", raw_active_hostname,
5030 expand_string_message);
5032 else if (nah[0] != 0) smtp_active_hostname = nah;
5035 /* Handle host checking: this facility mocks up an incoming SMTP call from a
5036 given IP address so that the blocking and relay configuration can be tested.
5037 Unless a sender_ident was set by -oMt, we discard it (the default is the
5038 caller's login name). An RFC 1413 call is made only if we are running in the
5039 test harness and an incoming interface and both ports are specified, because
5040 there is no TCP/IP call to find the ident for. */
5047 if (!sender_ident_set)
5049 sender_ident = NULL;
5050 if (f.running_in_test_harness && sender_host_port
5051 && interface_address && interface_port)
5052 verify_get_ident(1223); /* note hardwired port number */
5055 /* In case the given address is a non-canonical IPv6 address, canonicalize
5056 it. The code works for both IPv4 and IPv6, as it happens. */
5058 size = host_aton(sender_host_address, x);
5059 sender_host_address = store_get(48, FALSE); /* large enough for full IPv6 */
5060 (void)host_nmtoa(size, x, -1, sender_host_address, ':');
5062 /* Now set up for testing */
5064 host_build_sender_fullhost();
5068 f.sender_local = FALSE;
5069 f.sender_host_notsocket = TRUE;
5070 debug_file = stderr;
5071 debug_fd = fileno(debug_file);
5072 fprintf(stdout, "\n**** SMTP testing session as if from host %s\n"
5073 "**** but without any ident (RFC 1413) callback.\n"
5074 "**** This is not for real!\n\n",
5075 sender_host_address);
5077 memset(sender_host_cache, 0, sizeof(sender_host_cache));
5078 if (verify_check_host(&hosts_connection_nolog) == OK)
5079 BIT_CLEAR(log_selector, log_selector_size, Li_smtp_connection);
5080 log_write(L_smtp_connection, LOG_MAIN, "%s", smtp_get_connection_info());
5082 /* NOTE: We do *not* call smtp_log_no_mail() if smtp_start_session() fails,
5083 because a log line has already been written for all its failure exists
5084 (usually "connection refused: <reason>") and writing another one is
5085 unnecessary clutter. */
5087 if (smtp_start_session())
5089 for (; (reset_point = store_mark()); store_reset(reset_point))
5091 if (smtp_setup_msg() <= 0) break;
5092 if (!receive_msg(FALSE)) break;
5094 return_path = sender_address = NULL;
5095 dnslist_domain = dnslist_matched = NULL;
5096 #ifndef DISABLE_DKIM
5097 dkim_cur_signer = NULL;
5100 deliver_localpart_orig = NULL;
5101 deliver_domain_orig = NULL;
5102 callout_address = sending_ip_address = NULL;
5103 sender_rate = sender_rate_limit = sender_rate_period = NULL;
5107 exim_exit(EXIT_SUCCESS, US"main");
5111 /* Arrange for message reception if recipients or SMTP were specified;
5112 otherwise complain unless a version print (-bV) happened or this is a filter
5113 verification test or info dump.
5114 In the former case, show the configuration file name. */
5116 if (recipients_arg >= argc && !extract_recipients && !smtp_input)
5118 if (version_printed)
5120 if (Ustrchr(config_main_filelist, ':'))
5121 printf("Configuration file search path is %s\n", config_main_filelist);
5122 printf("Configuration file is %s\n", config_main_filename);
5123 return EXIT_SUCCESS;
5126 if (info_flag != CMDINFO_NONE)
5128 show_exim_information(info_flag, info_stdout ? stdout : stderr);
5129 return info_stdout ? EXIT_SUCCESS : EXIT_FAILURE;
5132 if (filter_test == FTEST_NONE)
5133 exim_usage(called_as);
5137 /* If mua_wrapper is set, Exim is being used to turn an MUA that submits on the
5138 standard input into an MUA that submits to a smarthost over TCP/IP. We know
5139 that we are not called from inetd, because that is rejected above. The
5140 following configuration settings are forced here:
5142 (1) Synchronous delivery (-odi)
5143 (2) Errors to stderr (-oep == -oeq)
5144 (3) No parallel remote delivery
5145 (4) Unprivileged delivery
5147 We don't force overall queueing options because there are several of them;
5148 instead, queueing is avoided below when mua_wrapper is set. However, we do need
5149 to override any SMTP queueing. */
5153 f.synchronous_delivery = TRUE;
5154 arg_error_handling = ERRORS_STDERR;
5155 remote_max_parallel = 1;
5156 deliver_drop_privilege = TRUE;
5157 f.queue_smtp = FALSE;
5158 queue_smtp_domains = NULL;
5160 message_utf8_downconvert = -1; /* convert-if-needed */
5165 /* Prepare to accept one or more new messages on the standard input. When a
5166 message has been read, its id is returned in message_id[]. If doing immediate
5167 delivery, we fork a delivery process for each received message, except for the
5168 last one, where we can save a process switch.
5170 It is only in non-smtp mode that error_handling is allowed to be changed from
5171 its default of ERRORS_SENDER by argument. (Idle thought: are any of the
5172 sendmail error modes other than -oem ever actually used? Later: yes.) */
5174 if (!smtp_input) error_handling = arg_error_handling;
5176 /* If this is an inetd call, ensure that stderr is closed to prevent panic
5177 logging being sent down the socket and make an identd call to get the
5180 else if (f.is_inetd)
5182 (void)fclose(stderr);
5183 exim_nullstd(); /* Re-open to /dev/null */
5184 verify_get_ident(IDENT_PORT);
5185 host_build_sender_fullhost();
5186 set_process_info("handling incoming connection from %s via inetd",
5190 /* If the sender host address has been set, build sender_fullhost if it hasn't
5191 already been done (which it will have been for inetd). This caters for the
5192 case when it is forced by -oMa. However, we must flag that it isn't a socket,
5193 so that the test for IP options is skipped for -bs input. */
5195 if (sender_host_address && !sender_fullhost)
5197 host_build_sender_fullhost();
5198 set_process_info("handling incoming connection from %s via -oMa",
5200 f.sender_host_notsocket = TRUE;
5203 /* Otherwise, set the sender host as unknown except for inetd calls. This
5204 prevents host checking in the case of -bs not from inetd and also for -bS. */
5206 else if (!f.is_inetd) f.sender_host_unknown = TRUE;
5208 /* If stdout does not exist, then dup stdin to stdout. This can happen
5209 if exim is started from inetd. In this case fd 0 will be set to the socket,
5210 but fd 1 will not be set. This also happens for passed SMTP channels. */
5212 if (fstat(1, &statbuf) < 0) (void)dup2(0, 1);
5214 /* Set up the incoming protocol name and the state of the program. Root is
5215 allowed to force received protocol via the -oMr option above. If we have come
5216 via inetd, the process info has already been set up. We don't set
5217 received_protocol here for smtp input, as it varies according to
5218 batch/HELO/EHLO/AUTH/TLS. */
5222 if (!f.is_inetd) set_process_info("accepting a local %sSMTP message from <%s>",
5223 smtp_batched_input? "batched " : "",
5224 (sender_address!= NULL)? sender_address : originator_login);
5228 int old_pool = store_pool;
5229 store_pool = POOL_PERM;
5230 if (!received_protocol)
5231 received_protocol = string_sprintf("local%s", called_as);
5232 store_pool = old_pool;
5233 set_process_info("accepting a local non-SMTP message from <%s>",
5237 /* Initialize the session_local_queue-only flag (this will be ignored if
5238 mua_wrapper is set) */
5241 session_local_queue_only = queue_only;
5243 /* For non-SMTP and for batched SMTP input, check that there is enough space on
5244 the spool if so configured. On failure, we must not attempt to send an error
5245 message! (For interactive SMTP, the check happens at MAIL FROM and an SMTP
5246 error code is given.) */
5248 if ((!smtp_input || smtp_batched_input) && !receive_check_fs(0))
5249 exim_fail("exim: insufficient disk space\n");
5251 /* If this is smtp input of any kind, real or batched, handle the start of the
5254 NOTE: We do *not* call smtp_log_no_mail() if smtp_start_session() fails,
5255 because a log line has already been written for all its failure exists
5256 (usually "connection refused: <reason>") and writing another one is
5257 unnecessary clutter. */
5263 memset(sender_host_cache, 0, sizeof(sender_host_cache));
5264 if (verify_check_host(&hosts_connection_nolog) == OK)
5265 BIT_CLEAR(log_selector, log_selector_size, Li_smtp_connection);
5266 log_write(L_smtp_connection, LOG_MAIN, "%s", smtp_get_connection_info());
5267 if (!smtp_start_session())
5270 exim_exit(EXIT_SUCCESS, US"smtp_start toplevel");
5274 /* Otherwise, set up the input size limit here. */
5278 thismessage_size_limit = expand_string_integer(message_size_limit, TRUE);
5279 if (expand_string_message)
5280 if (thismessage_size_limit == -1)
5281 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to expand "
5282 "message_size_limit: %s", expand_string_message);
5284 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "invalid value for "
5285 "message_size_limit: %s", expand_string_message);
5288 /* Loop for several messages when reading SMTP input. If we fork any child
5289 processes, we don't want to wait for them unless synchronous delivery is
5290 requested, so set SIGCHLD to SIG_IGN in that case. This is not necessarily the
5291 same as SIG_DFL, despite the fact that documentation often lists the default as
5292 "ignore". This is a confusing area. This is what I know:
5294 At least on some systems (e.g. Solaris), just setting SIG_IGN causes child
5295 processes that complete simply to go away without ever becoming defunct. You
5296 can't then wait for them - but we don't want to wait for them in the
5297 non-synchronous delivery case. However, this behaviour of SIG_IGN doesn't
5298 happen for all OS (e.g. *BSD is different).
5300 But that's not the end of the story. Some (many? all?) systems have the
5301 SA_NOCLDWAIT option for sigaction(). This requests the behaviour that Solaris
5302 has by default, so it seems that the difference is merely one of default
5303 (compare restarting vs non-restarting signals).
5305 To cover all cases, Exim sets SIG_IGN with SA_NOCLDWAIT here if it can. If not,
5306 it just sets SIG_IGN. To be on the safe side it also calls waitpid() at the end
5307 of the loop below. Paranoia rules.
5309 February 2003: That's *still* not the end of the story. There are now versions
5310 of Linux (where SIG_IGN does work) that are picky. If, having set SIG_IGN, a
5311 process then calls waitpid(), a grumble is written to the system log, because
5312 this is logically inconsistent. In other words, it doesn't like the paranoia.
5313 As a consequence of this, the waitpid() below is now excluded if we are sure
5314 that SIG_IGN works. */
5316 if (!f.synchronous_delivery)
5319 struct sigaction act;
5320 act.sa_handler = SIG_IGN;
5321 sigemptyset(&(act.sa_mask));
5322 act.sa_flags = SA_NOCLDWAIT;
5323 sigaction(SIGCHLD, &act, NULL);
5325 signal(SIGCHLD, SIG_IGN);
5329 /* Save the current store pool point, for resetting at the start of
5330 each message, and save the real sender address, if any. */
5332 real_sender_address = sender_address;
5334 /* Loop to receive messages; receive_msg() returns TRUE if there are more
5335 messages to be read (SMTP input), or FALSE otherwise (not SMTP, or SMTP channel
5340 reset_point = store_mark();
5343 /* Handle the SMTP case; call smtp_setup_mst() to deal with the initial SMTP
5344 input and build the recipients list, before calling receive_msg() to read the
5345 message proper. Whatever sender address is given in the SMTP transaction is
5346 often ignored for local senders - we use the actual sender, which is normally
5347 either the underlying user running this process or a -f argument provided by
5348 a trusted caller. It is saved in real_sender_address. The test for whether to
5349 accept the SMTP sender is encapsulated in receive_check_set_sender(). */
5354 if ((rc = smtp_setup_msg()) > 0)
5356 if (real_sender_address != NULL &&
5357 !receive_check_set_sender(sender_address))
5359 sender_address = raw_sender = real_sender_address;
5360 sender_address_unrewritten = NULL;
5363 /* For batched SMTP, we have to run the acl_not_smtp_start ACL, since it
5364 isn't really SMTP, so no other ACL will run until the acl_not_smtp one at
5365 the very end. The result of the ACL is ignored (as for other non-SMTP
5366 messages). It is run for its potential side effects. */
5368 if (smtp_batched_input && acl_not_smtp_start != NULL)
5370 uschar *user_msg, *log_msg;
5371 f.enable_dollar_recipients = TRUE;
5372 (void)acl_check(ACL_WHERE_NOTSMTP_START, NULL, acl_not_smtp_start,
5373 &user_msg, &log_msg);
5374 f.enable_dollar_recipients = FALSE;
5377 /* Now get the data for the message */
5379 more = receive_msg(extract_recipients);
5380 if (message_id[0] == 0)
5382 cancel_cutthrough_connection(TRUE, US"receive dropped");
5383 if (more) goto moreloop;
5384 smtp_log_no_mail(); /* Log no mail if configured */
5385 exim_exit(EXIT_FAILURE, US"receive toplevel");
5390 cancel_cutthrough_connection(TRUE, US"message setup dropped");
5391 smtp_log_no_mail(); /* Log no mail if configured */
5392 exim_exit(rc ? EXIT_FAILURE : EXIT_SUCCESS, US"msg setup toplevel");
5396 /* In the non-SMTP case, we have all the information from the command
5397 line, but must process it in case it is in the more general RFC822
5398 format, and in any case, to detect syntax errors. Also, it appears that
5399 the use of comma-separated lists as single arguments is common, so we
5400 had better support them. */
5405 int count = argc - recipients_arg;
5406 uschar **list = argv + recipients_arg;
5408 /* These options cannot be changed dynamically for non-SMTP messages */
5410 f.active_local_sender_retain = local_sender_retain;
5411 f.active_local_from_check = local_from_check;
5413 /* Save before any rewriting */
5415 raw_sender = string_copy(sender_address);
5417 /* Loop for each argument (supplied by user hence tainted) */
5419 for (int i = 0; i < count; i++)
5421 int start, end, domain;
5423 uschar * s = string_copy_taint(list[i], TRUE);
5425 /* Loop for each comma-separated address */
5429 BOOL finished = FALSE;
5431 uschar *ss = parse_find_address_end(s, FALSE);
5433 if (*ss == ',') *ss = 0; else finished = TRUE;
5435 /* Check max recipients - if -t was used, these aren't recipients */
5437 if (recipients_max > 0 && ++rcount > recipients_max &&
5438 !extract_recipients)
5439 if (error_handling == ERRORS_STDERR)
5441 fprintf(stderr, "exim: too many recipients\n");
5442 exim_exit(EXIT_FAILURE, US"main");
5446 moan_to_sender(ERRMESS_TOOMANYRECIP, NULL, NULL, stdin, TRUE)?
5447 errors_sender_rc : EXIT_FAILURE;
5451 BOOL b = allow_utf8_domains;
5452 allow_utf8_domains = TRUE;
5455 parse_extract_address(s, &errmess, &start, &end, &domain, FALSE);
5458 if (string_is_utf8(recipient))
5459 message_smtputf8 = TRUE;
5461 allow_utf8_domains = b;
5464 if (domain == 0 && !f.allow_unqualified_recipient)
5467 errmess = US"unqualified recipient address not allowed";
5470 if (recipient == NULL)
5472 if (error_handling == ERRORS_STDERR)
5474 fprintf(stderr, "exim: bad recipient address \"%s\": %s\n",
5475 string_printing(list[i]), errmess);
5476 exim_exit(EXIT_FAILURE, US"main");
5482 eblock.text1 = string_printing(list[i]);
5483 eblock.text2 = errmess;
5485 moan_to_sender(ERRMESS_BADARGADDRESS, &eblock, NULL, stdin, TRUE)?
5486 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 != NULL) debug_printf("Sender: %s\n", sender_address);
5502 if (recipients_list != NULL)
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, US"main");
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, US"main");
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, US"main");
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, US"main");
5611 exim_exit(EXIT_SUCCESS, US"main");
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 = fork()) == 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, US"main");
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, US"main"); /* Never returns */
5770 return 0; /* To stop compiler warning */