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_LMDB
976 fprintf(fp, " Experimental_LMDB");
978 #ifdef EXPERIMENTAL_QUEUEFILE
979 fprintf(fp, " Experimental_QUEUEFILE");
981 #if defined(EXPERIMENTAL_SRS) || defined(EXPERIMENTAL_SRS_NATIVE)
982 fprintf(fp, " Experimental_SRS");
984 #ifdef EXPERIMENTAL_ARC
985 fprintf(fp, " Experimental_ARC");
987 #ifdef EXPERIMENTAL_BRIGHTMAIL
988 fprintf(fp, " Experimental_Brightmail");
990 #ifdef EXPERIMENTAL_DCC
991 fprintf(fp, " Experimental_DCC");
993 #ifdef EXPERIMENTAL_DSN_INFO
994 fprintf(fp, " Experimental_DSN_info");
996 #ifdef EXPERIMENTAL_TLS_RESUME
997 fprintf(fp, " Experimental_TLS_resume");
1001 fprintf(fp, "Lookups (built-in):");
1002 #if defined(LOOKUP_LSEARCH) && LOOKUP_LSEARCH!=2
1003 fprintf(fp, " lsearch wildlsearch nwildlsearch iplsearch");
1005 #if defined(LOOKUP_CDB) && LOOKUP_CDB!=2
1006 fprintf(fp, " cdb");
1008 #if defined(LOOKUP_DBM) && LOOKUP_DBM!=2
1009 fprintf(fp, " dbm dbmjz dbmnz");
1011 #if defined(LOOKUP_DNSDB) && LOOKUP_DNSDB!=2
1012 fprintf(fp, " dnsdb");
1014 #if defined(LOOKUP_DSEARCH) && LOOKUP_DSEARCH!=2
1015 fprintf(fp, " dsearch");
1017 #if defined(LOOKUP_IBASE) && LOOKUP_IBASE!=2
1018 fprintf(fp, " ibase");
1020 #if defined(LOOKUP_JSON) && LOOKUP_JSON!=2
1021 fprintf(fp, " json");
1023 #if defined(LOOKUP_LDAP) && LOOKUP_LDAP!=2
1024 fprintf(fp, " ldap ldapdn ldapm");
1026 #ifdef EXPERIMENTAL_LMDB
1027 fprintf(fp, " lmdb");
1029 #if defined(LOOKUP_MYSQL) && LOOKUP_MYSQL!=2
1030 fprintf(fp, " mysql");
1032 #if defined(LOOKUP_NIS) && LOOKUP_NIS!=2
1033 fprintf(fp, " nis nis0");
1035 #if defined(LOOKUP_NISPLUS) && LOOKUP_NISPLUS!=2
1036 fprintf(fp, " nisplus");
1038 #if defined(LOOKUP_ORACLE) && LOOKUP_ORACLE!=2
1039 fprintf(fp, " oracle");
1041 #if defined(LOOKUP_PASSWD) && LOOKUP_PASSWD!=2
1042 fprintf(fp, " passwd");
1044 #if defined(LOOKUP_PGSQL) && LOOKUP_PGSQL!=2
1045 fprintf(fp, " pgsql");
1047 #if defined(LOOKUP_REDIS) && LOOKUP_REDIS!=2
1048 fprintf(fp, " redis");
1050 #if defined(LOOKUP_SQLITE) && LOOKUP_SQLITE!=2
1051 fprintf(fp, " sqlite");
1053 #if defined(LOOKUP_TESTDB) && LOOKUP_TESTDB!=2
1054 fprintf(fp, " testdb");
1056 #if defined(LOOKUP_WHOSON) && LOOKUP_WHOSON!=2
1057 fprintf(fp, " whoson");
1061 auth_show_supported(fp);
1062 route_show_supported(fp);
1063 transport_show_supported(fp);
1065 #ifdef WITH_CONTENT_SCAN
1066 malware_show_supported(fp);
1069 if (fixed_never_users[0] > 0)
1072 fprintf(fp, "Fixed never_users: ");
1073 for (i = 1; i <= (int)fixed_never_users[0] - 1; i++)
1074 fprintf(fp, "%d:", (unsigned int)fixed_never_users[i]);
1075 fprintf(fp, "%d\n", (unsigned int)fixed_never_users[i]);
1078 fprintf(fp, "Configure owner: %d:%d\n", config_uid, config_gid);
1080 fprintf(fp, "Size of off_t: " SIZE_T_FMT "\n", sizeof(off_t));
1082 /* Everything else is details which are only worth reporting when debugging.
1083 Perhaps the tls_version_report should move into this too. */
1086 /* clang defines __GNUC__ (at least, for me) so test for it first */
1087 #if defined(__clang__)
1088 fprintf(fp, "Compiler: CLang [%s]\n", __clang_version__);
1089 #elif defined(__GNUC__)
1090 fprintf(fp, "Compiler: GCC [%s]\n",
1094 "? unknown version ?"
1098 fprintf(fp, "Compiler: <unknown>\n");
1101 #if defined(__GLIBC__) && !defined(__UCLIBC__)
1102 fprintf(fp, "Library version: Glibc: Compile: %d.%d\n",
1103 __GLIBC__, __GLIBC_MINOR__);
1104 if (__GLIBC_PREREQ(2, 1))
1105 fprintf(fp, " Runtime: %s\n",
1106 gnu_get_libc_version());
1109 show_db_version(fp);
1112 tls_version_report(fp);
1115 utf8_version_report(fp);
1118 spf_lib_version_report(fp);
1121 for (auth_info * authi = auths_available; *authi->driver_name != '\0'; ++authi)
1122 if (authi->version_report)
1123 (*authi->version_report)(fp);
1125 /* PCRE_PRERELEASE is either defined and empty or a bare sequence of
1126 characters; unless it's an ancient version of PCRE in which case it
1128 #ifndef PCRE_PRERELEASE
1129 # define PCRE_PRERELEASE
1132 #define EXPAND_AND_QUOTE(X) QUOTE(X)
1133 fprintf(fp, "Library version: PCRE: Compile: %d.%d%s\n"
1135 PCRE_MAJOR, PCRE_MINOR,
1136 EXPAND_AND_QUOTE(PCRE_PRERELEASE) "",
1139 #undef EXPAND_AND_QUOTE
1142 for (int i = 0; i < lookup_list_count; i++)
1143 if (lookup_list[i]->version_report)
1144 lookup_list[i]->version_report(fp);
1146 #ifdef WHITELIST_D_MACROS
1147 fprintf(fp, "WHITELIST_D_MACROS: \"%s\"\n", WHITELIST_D_MACROS);
1149 fprintf(fp, "WHITELIST_D_MACROS unset\n");
1151 #ifdef TRUSTED_CONFIG_LIST
1152 fprintf(fp, "TRUSTED_CONFIG_LIST: \"%s\"\n", TRUSTED_CONFIG_LIST);
1154 fprintf(fp, "TRUSTED_CONFIG_LIST unset\n");
1161 /*************************************************
1162 * Show auxiliary information about Exim *
1163 *************************************************/
1166 show_exim_information(enum commandline_info request, FILE *stream)
1171 fprintf(stream, "Oops, something went wrong.\n");
1175 "The -bI: flag takes a string indicating which information to provide.\n"
1176 "If the string is not recognised, you'll get this help (on stderr).\n"
1178 " exim -bI:help this information\n"
1179 " exim -bI:dscp list of known dscp value keywords\n"
1180 " exim -bI:sieve list of supported sieve extensions\n"
1184 for (const uschar ** pp = exim_sieve_extension_list; *pp; ++pp)
1185 fprintf(stream, "%s\n", *pp);
1188 dscp_list_to_stream(stream);
1194 /*************************************************
1195 * Quote a local part *
1196 *************************************************/
1198 /* This function is used when a sender address or a From: or Sender: header
1199 line is being created from the caller's login, or from an authenticated_id. It
1200 applies appropriate quoting rules for a local part.
1202 Argument: the local part
1203 Returns: the local part, quoted if necessary
1207 local_part_quote(uschar *lpart)
1209 BOOL needs_quote = FALSE;
1212 for (uschar * t = lpart; !needs_quote && *t != 0; t++)
1214 needs_quote = !isalnum(*t) && strchr("!#$%&'*+-/=?^_`{|}~", *t) == NULL &&
1215 (*t != '.' || t == lpart || t[1] == 0);
1218 if (!needs_quote) return lpart;
1220 g = string_catn(NULL, US"\"", 1);
1224 uschar *nq = US Ustrpbrk(lpart, "\\\"");
1227 g = string_cat(g, lpart);
1230 g = string_catn(g, lpart, nq - lpart);
1231 g = string_catn(g, US"\\", 1);
1232 g = string_catn(g, nq, 1);
1236 g = string_catn(g, US"\"", 1);
1237 return string_from_gstring(g);
1243 /*************************************************
1244 * Load readline() functions *
1245 *************************************************/
1247 /* This function is called from testing executions that read data from stdin,
1248 but only when running as the calling user. Currently, only -be does this. The
1249 function loads the readline() function library and passes back the functions.
1250 On some systems, it needs the curses library, so load that too, but try without
1251 it if loading fails. All this functionality has to be requested at build time.
1254 fn_readline_ptr pointer to where to put the readline pointer
1255 fn_addhist_ptr pointer to where to put the addhistory function
1257 Returns: the dlopen handle or NULL on failure
1261 set_readline(char * (**fn_readline_ptr)(const char *),
1262 void (**fn_addhist_ptr)(const char *))
1265 void *dlhandle_curses = dlopen("libcurses." DYNLIB_FN_EXT, RTLD_GLOBAL|RTLD_LAZY);
1267 dlhandle = dlopen("libreadline." DYNLIB_FN_EXT, RTLD_GLOBAL|RTLD_NOW);
1268 if (dlhandle_curses) dlclose(dlhandle_curses);
1272 /* Checked manual pages; at least in GNU Readline 6.1, the prototypes are:
1273 * char * readline (const char *prompt);
1274 * void add_history (const char *string);
1276 *fn_readline_ptr = (char *(*)(const char*))dlsym(dlhandle, "readline");
1277 *fn_addhist_ptr = (void(*)(const char*))dlsym(dlhandle, "add_history");
1280 DEBUG(D_any) debug_printf("failed to load readline: %s\n", dlerror());
1288 /*************************************************
1289 * Get a line from stdin for testing things *
1290 *************************************************/
1292 /* This function is called when running tests that can take a number of lines
1293 of input (for example, -be and -bt). It handles continuations and trailing
1294 spaces. And prompting and a blank line output on eof. If readline() is in use,
1295 the arguments are non-NULL and provide the relevant functions.
1298 fn_readline readline function or NULL
1299 fn_addhist addhist function or NULL
1301 Returns: pointer to dynamic memory, or NULL at end of file
1305 get_stdinput(char *(*fn_readline)(const char *), void(*fn_addhist)(const char *))
1309 if (!fn_readline) { printf("> "); fflush(stdout); }
1311 for (int i = 0;; i++)
1313 uschar buffer[1024];
1317 char *readline_line = NULL;
1320 if (!(readline_line = fn_readline((i > 0)? "":"> "))) break;
1321 if (*readline_line != 0 && fn_addhist) fn_addhist(readline_line);
1322 p = US readline_line;
1327 /* readline() not in use */
1330 if (Ufgets(buffer, sizeof(buffer), stdin) == NULL) break;
1334 /* Handle the line */
1336 ss = p + (int)Ustrlen(p);
1337 while (ss > p && isspace(ss[-1])) ss--;
1340 while (p < ss && isspace(*p)) p++; /* leading space after cont */
1342 g = string_catn(g, p, ss - p);
1345 if (fn_readline) free(readline_line);
1348 /* g can only be NULL if ss==p */
1349 if (ss == p || g->s[g->ptr-1] != '\\')
1353 (void) string_from_gstring(g);
1356 if (!g) printf("\n");
1357 return string_from_gstring(g);
1362 /*************************************************
1363 * Output usage information for the program *
1364 *************************************************/
1366 /* This function is called when there are no recipients
1367 or a specific --help argument was added.
1370 progname information on what name we were called by
1372 Returns: DOES NOT RETURN
1376 exim_usage(uschar *progname)
1379 /* Handle specific program invocation variants */
1380 if (Ustrcmp(progname, US"-mailq") == 0)
1382 "mailq - list the contents of the mail queue\n\n"
1383 "For a list of options, see the Exim documentation.\n");
1385 /* Generic usage - we output this whatever happens */
1387 "Exim is a Mail Transfer Agent. It is normally called by Mail User Agents,\n"
1388 "not directly from a shell command line. Options and/or arguments control\n"
1389 "what it does when called. For a list of options, see the Exim documentation.\n");
1394 /*************************************************
1395 * Validate that the macros given are okay *
1396 *************************************************/
1398 /* Typically, Exim will drop privileges if macros are supplied. In some
1399 cases, we want to not do so.
1401 Arguments: opt_D_used - true if the commandline had a "-D" option
1402 Returns: true if trusted, false otherwise
1406 macros_trusted(BOOL opt_D_used)
1408 #ifdef WHITELIST_D_MACROS
1409 uschar *whitelisted, *end, *p, **whites;
1410 int white_count, i, n;
1412 BOOL prev_char_item, found;
1417 #ifndef WHITELIST_D_MACROS
1421 /* We only trust -D overrides for some invoking users:
1422 root, the exim run-time user, the optional config owner user.
1423 I don't know why config-owner would be needed, but since they can own the
1424 config files anyway, there's no security risk to letting them override -D. */
1425 if ( ! ((real_uid == root_uid)
1426 || (real_uid == exim_uid)
1427 #ifdef CONFIGURE_OWNER
1428 || (real_uid == config_uid)
1432 debug_printf("macros_trusted rejecting macros for uid %d\n", (int) real_uid);
1436 /* Get a list of macros which are whitelisted */
1437 whitelisted = string_copy_perm(US WHITELIST_D_MACROS, FALSE);
1438 prev_char_item = FALSE;
1440 for (p = whitelisted; *p != '\0'; ++p)
1442 if (*p == ':' || isspace(*p))
1447 prev_char_item = FALSE;
1450 if (!prev_char_item)
1451 prev_char_item = TRUE;
1458 whites = store_malloc(sizeof(uschar *) * (white_count+1));
1459 for (p = whitelisted, i = 0; (p != end) && (i < white_count); ++p)
1464 if (i == white_count)
1466 while (*p != '\0' && p < end)
1472 /* The list of commandline macros should be very short.
1473 Accept the N*M complexity. */
1474 for (macro_item * m = macros_user; m; m = m->next) if (m->command_line)
1477 for (uschar ** w = whites; *w; ++w)
1478 if (Ustrcmp(*w, m->name) == 0)
1485 if (!m->replacement)
1487 if ((len = m->replen) == 0)
1489 n = pcre_exec(regex_whitelisted_macro, NULL, CS m->replacement, len,
1490 0, PCRE_EOPT, NULL, 0);
1493 if (n != PCRE_ERROR_NOMATCH)
1494 debug_printf("macros_trusted checking %s returned %d\n", m->name, n);
1498 DEBUG(D_any) debug_printf("macros_trusted overridden to true by whitelisting\n");
1504 /*************************************************
1505 * Expansion testing *
1506 *************************************************/
1508 /* Expand and print one item, doing macro-processing.
1511 item line for expansion
1515 expansion_test_line(uschar * line)
1520 Ustrncpy(big_buffer, line, big_buffer_size);
1521 big_buffer[big_buffer_size-1] = '\0';
1522 len = Ustrlen(big_buffer);
1524 (void) macros_expand(0, &len, &dummy_macexp);
1526 if (isupper(big_buffer[0]))
1528 if (macro_read_assignment(big_buffer))
1529 printf("Defined macro '%s'\n", mlast->name);
1532 if ((line = expand_string(big_buffer))) printf("%s\n", CS line);
1533 else printf("Failed: %s\n", expand_string_message);
1538 /*************************************************
1539 * Entry point and high-level code *
1540 *************************************************/
1542 /* Entry point for the Exim mailer. Analyse the arguments and arrange to take
1543 the appropriate action. All the necessary functions are present in the one
1544 binary. I originally thought one should split it up, but it turns out that so
1545 much of the apparatus is needed in each chunk that one might as well just have
1546 it all available all the time, which then makes the coding easier as well.
1549 argc count of entries in argv
1550 argv argument strings, with argv[0] being the program name
1552 Returns: EXIT_SUCCESS if terminated successfully
1553 EXIT_FAILURE otherwise, except when a message has been sent
1554 to the sender, and -oee was given
1558 main(int argc, char **cargv)
1560 uschar **argv = USS cargv;
1561 int arg_receive_timeout = -1;
1562 int arg_smtp_receive_timeout = -1;
1563 int arg_error_handling = error_handling;
1564 int filter_sfd = -1;
1565 int filter_ufd = -1;
1568 int list_queue_option = 0;
1570 int msg_action_arg = -1;
1571 int namelen = (argv[0] == NULL)? 0 : Ustrlen(argv[0]);
1572 int queue_only_reason = 0;
1574 int perl_start_option = 0;
1576 int recipients_arg = argc;
1577 int sender_address_domain = 0;
1578 int test_retry_arg = -1;
1579 int test_rewrite_arg = -1;
1580 gid_t original_egid;
1581 BOOL arg_queue_only = FALSE;
1582 BOOL bi_option = FALSE;
1583 BOOL checking = FALSE;
1584 BOOL count_queue = FALSE;
1585 BOOL expansion_test = FALSE;
1586 BOOL extract_recipients = FALSE;
1587 BOOL flag_G = FALSE;
1588 BOOL flag_n = FALSE;
1589 BOOL forced_delivery = FALSE;
1590 BOOL f_end_dot = FALSE;
1591 BOOL deliver_give_up = FALSE;
1592 BOOL list_queue = FALSE;
1593 BOOL list_options = FALSE;
1594 BOOL list_config = FALSE;
1595 BOOL local_queue_only;
1597 BOOL one_msg_action = FALSE;
1598 BOOL opt_D_used = FALSE;
1599 BOOL queue_only_set = FALSE;
1600 BOOL receiving_message = TRUE;
1601 BOOL sender_ident_set = FALSE;
1602 BOOL session_local_queue_only;
1604 BOOL removed_privilege = FALSE;
1605 BOOL usage_wanted = FALSE;
1606 BOOL verify_address_mode = FALSE;
1607 BOOL verify_as_sender = FALSE;
1608 BOOL version_printed = FALSE;
1609 uschar *alias_arg = NULL;
1610 uschar *called_as = US"";
1611 uschar *cmdline_syslog_name = NULL;
1612 uschar *start_queue_run_id = NULL;
1613 uschar *stop_queue_run_id = NULL;
1614 uschar *expansion_test_message = NULL;
1615 uschar *ftest_domain = NULL;
1616 uschar *ftest_localpart = NULL;
1617 uschar *ftest_prefix = NULL;
1618 uschar *ftest_suffix = NULL;
1619 uschar *log_oneline = NULL;
1620 uschar *malware_test_file = NULL;
1621 uschar *real_sender_address;
1622 uschar *originator_home = US"/";
1627 struct stat statbuf;
1628 pid_t passed_qr_pid = (pid_t)0;
1629 int passed_qr_pipe = -1;
1630 gid_t group_list[EXIM_GROUPLIST_SIZE];
1632 /* For the -bI: flag */
1633 enum commandline_info info_flag = CMDINFO_NONE;
1634 BOOL info_stdout = FALSE;
1636 /* Possible options for -R and -S */
1638 static uschar *rsopts[] = { US"f", US"ff", US"r", US"rf", US"rff" };
1640 /* Need to define this in case we need to change the environment in order
1641 to get rid of a bogus time zone. We have to make it char rather than uschar
1642 because some OS define it in /usr/include/unistd.h. */
1644 extern char **environ;
1646 #ifdef MEASURE_TIMING
1647 (void)gettimeofday(×tamp_startup, NULL);
1650 /* If the Exim user and/or group and/or the configuration file owner/group were
1651 defined by ref:name at build time, we must now find the actual uid/gid values.
1652 This is a feature to make the lives of binary distributors easier. */
1654 #ifdef EXIM_USERNAME
1655 if (route_finduser(US EXIM_USERNAME, &pw, &exim_uid))
1658 exim_fail("exim: refusing to run with uid 0 for \"%s\"\n", EXIM_USERNAME);
1660 /* If ref:name uses a number as the name, route_finduser() returns
1661 TRUE with exim_uid set and pw coerced to NULL. */
1663 exim_gid = pw->pw_gid;
1664 #ifndef EXIM_GROUPNAME
1667 "exim: ref:name should specify a usercode, not a group.\n"
1668 "exim: can't let you get away with it unless you also specify a group.\n");
1672 exim_fail("exim: failed to find uid for user name \"%s\"\n", EXIM_USERNAME);
1675 #ifdef EXIM_GROUPNAME
1676 if (!route_findgroup(US EXIM_GROUPNAME, &exim_gid))
1677 exim_fail("exim: failed to find gid for group name \"%s\"\n", EXIM_GROUPNAME);
1680 #ifdef CONFIGURE_OWNERNAME
1681 if (!route_finduser(US CONFIGURE_OWNERNAME, NULL, &config_uid))
1682 exim_fail("exim: failed to find uid for user name \"%s\"\n",
1683 CONFIGURE_OWNERNAME);
1686 /* We default the system_filter_user to be the Exim run-time user, as a
1687 sane non-root value. */
1688 system_filter_uid = exim_uid;
1690 #ifdef CONFIGURE_GROUPNAME
1691 if (!route_findgroup(US CONFIGURE_GROUPNAME, &config_gid))
1692 exim_fail("exim: failed to find gid for group name \"%s\"\n",
1693 CONFIGURE_GROUPNAME);
1696 /* In the Cygwin environment, some initialization used to need doing.
1697 It was fudged in by means of this macro; now no longer but we'll leave
1698 it in case of others. */
1704 /* Check a field which is patched when we are running Exim within its
1705 testing harness; do a fast initial check, and then the whole thing. */
1707 f.running_in_test_harness =
1708 *running_status == '<' && Ustrcmp(running_status, "<<<testing>>>") == 0;
1709 if (f.running_in_test_harness)
1712 /* The C standard says that the equivalent of setlocale(LC_ALL, "C") is obeyed
1713 at the start of a program; however, it seems that some environments do not
1714 follow this. A "strange" locale can affect the formatting of timestamps, so we
1717 setlocale(LC_ALL, "C");
1719 /* Get the offset between CLOCK_MONOTONIC and wallclock */
1721 #ifdef _POSIX_MONOTONIC_CLOCK
1725 /* Set up the default handler for timing using alarm(). */
1727 os_non_restarting_signal(SIGALRM, sigalrm_handler);
1729 /* Ensure we have a buffer for constructing log entries. Use malloc directly,
1730 because store_malloc writes a log entry on failure. */
1732 if (!(log_buffer = US malloc(LOG_BUFFER_SIZE)))
1733 exim_fail("exim: failed to get store for log buffer\n");
1735 /* Initialize the default log options. */
1737 bits_set(log_selector, log_selector_size, log_default);
1739 /* Set log_stderr to stderr, provided that stderr exists. This gets reset to
1740 NULL when the daemon is run and the file is closed. We have to use this
1741 indirection, because some systems don't allow writing to the variable "stderr".
1744 if (fstat(fileno(stderr), &statbuf) >= 0) log_stderr = stderr;
1746 /* Arrange for the PCRE regex library to use our store functions. Note that
1747 the normal calls are actually macros that add additional arguments for
1748 debugging purposes so we have to assign specially constructed functions here.
1749 The default is to use store in the stacking pool, but this is overridden in the
1750 regex_must_compile() function. */
1752 pcre_malloc = function_store_get;
1753 pcre_free = function_dummy_free;
1755 /* Ensure there is a big buffer for temporary use in several places. It is put
1756 in malloc store so that it can be freed for enlargement if necessary. */
1758 big_buffer = store_malloc(big_buffer_size);
1760 /* Set up the handler for the data request signal, and set the initial
1761 descriptive text. */
1763 process_info = store_get(PROCESS_INFO_SIZE, TRUE); /* tainted */
1764 set_process_info("initializing");
1765 os_restarting_signal(SIGUSR1, usr1_handler);
1767 /* If running in a dockerized environment, the TERM signal is only
1768 delegated to the PID 1 if we request it by setting an signal handler */
1769 if (getpid() == 1) signal(SIGTERM, term_handler);
1771 /* SIGHUP is used to get the daemon to reconfigure. It gets set as appropriate
1772 in the daemon code. For the rest of Exim's uses, we ignore it. */
1774 signal(SIGHUP, SIG_IGN);
1776 /* We don't want to die on pipe errors as the code is written to handle
1777 the write error instead. */
1779 signal(SIGPIPE, SIG_IGN);
1781 /* Under some circumstance on some OS, Exim can get called with SIGCHLD
1782 set to SIG_IGN. This causes subprocesses that complete before the parent
1783 process waits for them not to hang around, so when Exim calls wait(), nothing
1784 is there. The wait() code has been made robust against this, but let's ensure
1785 that SIGCHLD is set to SIG_DFL, because it's tidier to wait and get a process
1786 ending status. We use sigaction rather than plain signal() on those OS where
1787 SA_NOCLDWAIT exists, because we want to be sure it is turned off. (There was a
1788 problem on AIX with this.) */
1792 struct sigaction act;
1793 act.sa_handler = SIG_DFL;
1794 sigemptyset(&(act.sa_mask));
1796 sigaction(SIGCHLD, &act, NULL);
1799 signal(SIGCHLD, SIG_DFL);
1802 /* Save the arguments for use if we re-exec exim as a daemon after receiving
1807 /* Set up the version number. Set up the leading 'E' for the external form of
1808 message ids, set the pointer to the internal form, and initialize it to
1809 indicate no message being processed. */
1812 message_id_option[0] = '-';
1813 message_id_external = message_id_option + 1;
1814 message_id_external[0] = 'E';
1815 message_id = message_id_external + 1;
1818 /* Set the umask to zero so that any files Exim creates using open() are
1819 created with the modes that it specifies. NOTE: Files created with fopen() have
1820 a problem, which was not recognized till rather late (February 2006). With this
1821 umask, such files will be world writeable. (They are all content scanning files
1822 in the spool directory, which isn't world-accessible, so this is not a
1823 disaster, but it's untidy.) I don't want to change this overall setting,
1824 however, because it will interact badly with the open() calls. Instead, there's
1825 now a function called modefopen() that fiddles with the umask while calling
1830 /* Precompile the regular expression for matching a message id. Keep this in
1831 step with the code that generates ids in the accept.c module. We need to do
1832 this here, because the -M options check their arguments for syntactic validity
1833 using mac_ismsgid, which uses this. */
1836 regex_must_compile(US"^(?:[^\\W_]{6}-){2}[^\\W_]{2}$", FALSE, TRUE);
1838 /* Precompile the regular expression that is used for matching an SMTP error
1839 code, possibly extended, at the start of an error message. Note that the
1840 terminating whitespace character is included. */
1843 regex_must_compile(US"^\\d\\d\\d\\s(?:\\d\\.\\d\\d?\\d?\\.\\d\\d?\\d?\\s)?",
1846 #ifdef WHITELIST_D_MACROS
1847 /* Precompile the regular expression used to filter the content of macros
1848 given to -D for permissibility. */
1850 regex_whitelisted_macro =
1851 regex_must_compile(US"^[A-Za-z0-9_/.-]*$", FALSE, TRUE);
1854 for (i = 0; i < REGEX_VARS; i++) regex_vars[i] = NULL;
1856 /* If the program is called as "mailq" treat it as equivalent to "exim -bp";
1857 this seems to be a generally accepted convention, since one finds symbolic
1858 links called "mailq" in standard OS configurations. */
1860 if ((namelen == 5 && Ustrcmp(argv[0], "mailq") == 0) ||
1861 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/mailq", 6) == 0))
1864 receiving_message = FALSE;
1865 called_as = US"-mailq";
1868 /* If the program is called as "rmail" treat it as equivalent to
1869 "exim -i -oee", thus allowing UUCP messages to be input using non-SMTP mode,
1870 i.e. preventing a single dot on a line from terminating the message, and
1871 returning with zero return code, even in cases of error (provided an error
1872 message has been sent). */
1874 if ((namelen == 5 && Ustrcmp(argv[0], "rmail") == 0) ||
1875 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/rmail", 6) == 0))
1878 called_as = US"-rmail";
1879 errors_sender_rc = EXIT_SUCCESS;
1882 /* If the program is called as "rsmtp" treat it as equivalent to "exim -bS";
1883 this is a smail convention. */
1885 if ((namelen == 5 && Ustrcmp(argv[0], "rsmtp") == 0) ||
1886 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/rsmtp", 6) == 0))
1888 smtp_input = smtp_batched_input = TRUE;
1889 called_as = US"-rsmtp";
1892 /* If the program is called as "runq" treat it as equivalent to "exim -q";
1893 this is a smail convention. */
1895 if ((namelen == 4 && Ustrcmp(argv[0], "runq") == 0) ||
1896 (namelen > 4 && Ustrncmp(argv[0] + namelen - 5, "/runq", 5) == 0))
1899 receiving_message = FALSE;
1900 called_as = US"-runq";
1903 /* If the program is called as "newaliases" treat it as equivalent to
1904 "exim -bi"; this is a sendmail convention. */
1906 if ((namelen == 10 && Ustrcmp(argv[0], "newaliases") == 0) ||
1907 (namelen > 10 && Ustrncmp(argv[0] + namelen - 11, "/newaliases", 11) == 0))
1910 receiving_message = FALSE;
1911 called_as = US"-newaliases";
1914 /* Save the original effective uid for a couple of uses later. It should
1915 normally be root, but in some esoteric environments it may not be. */
1917 original_euid = geteuid();
1918 original_egid = getegid();
1920 /* Get the real uid and gid. If the caller is root, force the effective uid/gid
1921 to be the same as the real ones. This makes a difference only if Exim is setuid
1922 (or setgid) to something other than root, which could be the case in some
1923 special configurations. */
1925 real_uid = getuid();
1926 real_gid = getgid();
1928 if (real_uid == root_uid)
1930 if ((rv = setgid(real_gid)))
1931 exim_fail("exim: setgid(%ld) failed: %s\n",
1932 (long int)real_gid, strerror(errno));
1933 if ((rv = setuid(real_uid)))
1934 exim_fail("exim: setuid(%ld) failed: %s\n",
1935 (long int)real_uid, strerror(errno));
1938 /* If neither the original real uid nor the original euid was root, Exim is
1939 running in an unprivileged state. */
1941 unprivileged = (real_uid != root_uid && original_euid != root_uid);
1943 /* Scan the program's arguments. Some can be dealt with right away; others are
1944 simply recorded for checking and handling afterwards. Do a high-level switch
1945 on the second character (the one after '-'), to save some effort. */
1947 for (i = 1; i < argc; i++)
1949 BOOL badarg = FALSE;
1950 uschar *arg = argv[i];
1954 /* An argument not starting with '-' is the start of a recipients list;
1955 break out of the options-scanning loop. */
1963 /* An option consisting of -- terminates the options */
1965 if (Ustrcmp(arg, "--") == 0)
1967 recipients_arg = i + 1;
1971 /* Handle flagged options */
1973 switchchar = arg[1];
1976 /* Make all -ex options synonymous with -oex arguments, since that
1977 is assumed by various callers. Also make -qR options synonymous with -R
1978 options, as that seems to be required as well. Allow for -qqR too, and
1979 the same for -S options. */
1981 if (Ustrncmp(arg+1, "oe", 2) == 0 ||
1982 Ustrncmp(arg+1, "qR", 2) == 0 ||
1983 Ustrncmp(arg+1, "qS", 2) == 0)
1985 switchchar = arg[2];
1988 else if (Ustrncmp(arg+1, "qqR", 3) == 0 || Ustrncmp(arg+1, "qqS", 3) == 0)
1990 switchchar = arg[3];
1992 f.queue_2stage = TRUE;
1995 /* Make -r synonymous with -f, since it is a documented alias */
1997 else if (arg[1] == 'r') switchchar = 'f';
1999 /* Make -ov synonymous with -v */
2001 else if (Ustrcmp(arg, "-ov") == 0)
2007 /* deal with --option_aliases */
2008 else if (switchchar == '-')
2010 if (Ustrcmp(argrest, "help") == 0)
2012 usage_wanted = TRUE;
2015 else if (Ustrcmp(argrest, "version") == 0)
2022 /* High-level switch on active initial letter */
2027 /* sendmail uses -Ac and -Am to control which .cf file is used;
2030 if (*argrest == '\0') { badarg = TRUE; break; }
2033 BOOL ignore = FALSE;
2038 if (*(argrest + 1) == '\0')
2042 if (!ignore) badarg = TRUE;
2046 /* -Btype is a sendmail option for 7bit/8bit setting. Exim is 8-bit clean
2047 so has no need of it. */
2050 if (!*argrest) i++; /* Skip over the type */
2056 receiving_message = FALSE; /* Reset TRUE for -bm, -bS, -bs below */
2060 /* -bd: Run in daemon mode, awaiting SMTP connections.
2061 -bdf: Ditto, but in the foreground.
2064 f.daemon_listen = TRUE;
2065 if (*argrest == 'f') f.background_daemon = FALSE;
2066 else if (*argrest) badarg = TRUE;
2069 /* -be: Run in expansion test mode
2070 -bem: Ditto, but read a message from a file first
2073 expansion_test = checking = TRUE;
2074 if (*argrest == 'm')
2076 if (++i >= argc) { badarg = TRUE; break; }
2077 expansion_test_message = argv[i];
2080 if (*argrest) badarg = TRUE;
2083 /* -bF: Run system filter test */
2085 filter_test |= checking = FTEST_SYSTEM;
2086 if (*argrest) { badarg = TRUE; break; }
2087 if (++i < argc) filter_test_sfile = argv[i]; else
2088 exim_fail("exim: file name expected after %s\n", argv[i-1]);
2091 /* -bf: Run user filter test
2092 -bfd: Set domain for filter testing
2093 -bfl: Set local part for filter testing
2094 -bfp: Set prefix for filter testing
2095 -bfs: Set suffix for filter testing
2100 filter_test |= checking = FTEST_USER;
2101 if (++i < argc) filter_test_ufile = argv[i];
2102 else exim_fail("exim: file name expected after %s\n", argv[i-1]);
2107 exim_fail("exim: string expected after %s\n", arg);
2108 if (Ustrcmp(argrest, "d") == 0) ftest_domain = argv[i];
2109 else if (Ustrcmp(argrest, "l") == 0) ftest_localpart = argv[i];
2110 else if (Ustrcmp(argrest, "p") == 0) ftest_prefix = argv[i];
2111 else if (Ustrcmp(argrest, "s") == 0) ftest_suffix = argv[i];
2116 /* -bh: Host checking - an IP address must follow. */
2118 if (!*argrest || Ustrcmp(argrest, "c") == 0)
2120 if (++i >= argc) { badarg = TRUE; break; }
2121 sender_host_address = argv[i];
2122 host_checking = checking = f.log_testing_mode = TRUE;
2123 f.host_checking_callout = *argrest == 'c';
2124 message_logs = FALSE;
2129 /* -bi: This option is used by sendmail to initialize *the* alias file,
2130 though it has the -oA option to specify a different file. Exim has no
2131 concept of *the* alias file, but since Sun's YP make script calls
2132 sendmail this way, some support must be provided. */
2134 if (!*++argrest) bi_option = TRUE;
2138 /* -bI: provide information, of the type to follow after a colon.
2139 This is an Exim flag. */
2141 if (Ustrlen(argrest) >= 1 && *argrest == ':')
2143 uschar *p = argrest+1;
2144 info_flag = CMDINFO_HELP;
2146 if (strcmpic(p, CUS"sieve") == 0)
2148 info_flag = CMDINFO_SIEVE;
2151 else if (strcmpic(p, CUS"dscp") == 0)
2153 info_flag = CMDINFO_DSCP;
2156 else if (strcmpic(p, CUS"help") == 0)
2162 /* -bm: Accept and deliver message - the default option. Reinstate
2163 receiving_message, which got turned off for all -b options.
2164 -bmalware: test the filename given for malware */
2166 if (!*argrest) receiving_message = TRUE;
2167 else if (Ustrcmp(argrest, "alware") == 0)
2169 if (++i >= argc) { badarg = TRUE; break; }
2171 malware_test_file = argv[i];
2176 /* -bnq: For locally originating messages, do not qualify unqualified
2177 addresses. In the envelope, this causes errors; in header lines they
2180 if (Ustrcmp(argrest, "q") == 0)
2182 f.allow_unqualified_sender = FALSE;
2183 f.allow_unqualified_recipient = FALSE;
2188 /* -bpxx: List the contents of the mail queue, in various forms. If
2189 the option is -bpc, just a queue count is needed. Otherwise, if the
2190 first letter after p is r, then order is random. */
2192 if (*argrest == 'c')
2195 if (*++argrest) badarg = TRUE;
2199 if (*argrest == 'r')
2201 list_queue_option = 8;
2204 else list_queue_option = 0;
2208 /* -bp: List the contents of the mail queue, top-level only */
2212 /* -bpu: List the contents of the mail queue, top-level undelivered */
2214 else if (Ustrcmp(argrest, "u") == 0) list_queue_option += 1;
2216 /* -bpa: List the contents of the mail queue, including all delivered */
2218 else if (Ustrcmp(argrest, "a") == 0) list_queue_option += 2;
2220 /* Unknown after -bp[r] */
2226 /* -bP: List the configuration variables given as the address list.
2227 Force -v, so configuration errors get displayed. */
2230 /* -bP config: we need to setup here, because later,
2231 * when list_options is checked, the config is read already */
2234 else if (argv[i+1] && Ustrcmp(argv[i+1], "config") == 0)
2237 readconf_save_config(version_string);
2241 list_options = TRUE;
2242 debug_selector |= D_v;
2243 debug_file = stderr;
2247 /* -brt: Test retry configuration lookup */
2249 if (Ustrcmp(argrest, "t") == 0)
2252 test_retry_arg = i + 1;
2256 /* -brw: Test rewrite configuration */
2258 else if (Ustrcmp(argrest, "w") == 0)
2261 test_rewrite_arg = i + 1;
2267 /* -bS: Read SMTP commands on standard input, but produce no replies -
2268 all errors are reported by sending messages. */
2271 smtp_input = smtp_batched_input = receiving_message = TRUE;
2275 /* -bs: Read SMTP commands on standard input and produce SMTP replies
2276 on standard output. */
2278 if (!*argrest) smtp_input = receiving_message = TRUE;
2282 /* -bt: address testing mode */
2285 f.address_test_mode = checking = f.log_testing_mode = TRUE;
2289 /* -bv: verify addresses */
2292 verify_address_mode = checking = f.log_testing_mode = TRUE;
2294 /* -bvs: verify sender addresses */
2296 else if (Ustrcmp(argrest, "s") == 0)
2298 verify_address_mode = checking = f.log_testing_mode = TRUE;
2299 verify_as_sender = TRUE;
2304 /* -bV: Print version string and support details */
2308 printf("Exim version %s #%s built %s\n", version_string,
2309 version_cnumber, version_date);
2310 printf("%s\n", CS version_copyright);
2311 version_printed = TRUE;
2312 show_whats_supported(stdout);
2313 f.log_testing_mode = TRUE;
2318 /* -bw: inetd wait mode, accept a listening socket as stdin */
2320 f.inetd_wait_mode = TRUE;
2321 f.background_daemon = FALSE;
2322 f.daemon_listen = TRUE;
2324 if ((inetd_wait_timeout = readconf_readtime(argrest, 0, FALSE)) <= 0)
2325 exim_fail("exim: bad time value %s: abandoned\n", argv[i]);
2336 /* -C: change configuration file list; ignore if it isn't really
2337 a change! Enforce a prefix check if required. */
2342 if(++i < argc) argrest = argv[i]; else
2343 { badarg = TRUE; break; }
2345 if (Ustrcmp(config_main_filelist, argrest) != 0)
2347 #ifdef ALT_CONFIG_PREFIX
2349 int len = Ustrlen(ALT_CONFIG_PREFIX);
2350 const uschar *list = argrest;
2352 while((filename = string_nextinlist(&list, &sep, big_buffer,
2353 big_buffer_size)) != NULL)
2355 if ((Ustrlen(filename) < len ||
2356 Ustrncmp(filename, ALT_CONFIG_PREFIX, len) != 0 ||
2357 Ustrstr(filename, "/../") != NULL) &&
2358 (Ustrcmp(filename, "/dev/null") != 0 || real_uid != root_uid))
2359 exim_fail("-C Permission denied\n");
2362 if (real_uid != root_uid)
2364 #ifdef TRUSTED_CONFIG_LIST
2366 if (real_uid != exim_uid
2367 #ifdef CONFIGURE_OWNER
2368 && real_uid != config_uid
2371 f.trusted_config = FALSE;
2374 FILE *trust_list = Ufopen(TRUSTED_CONFIG_LIST, "rb");
2377 struct stat statbuf;
2379 if (fstat(fileno(trust_list), &statbuf) != 0 ||
2380 (statbuf.st_uid != root_uid /* owner not root */
2381 #ifdef CONFIGURE_OWNER
2382 && statbuf.st_uid != config_uid /* owner not the special one */
2385 (statbuf.st_gid != root_gid /* group not root */
2386 #ifdef CONFIGURE_GROUP
2387 && statbuf.st_gid != config_gid /* group not the special one */
2389 && (statbuf.st_mode & 020) != 0 /* group writeable */
2391 (statbuf.st_mode & 2) != 0) /* world writeable */
2393 f.trusted_config = FALSE;
2398 /* Well, the trust list at least is up to scratch... */
2399 rmark reset_point = store_mark();
2400 uschar *trusted_configs[32];
2404 while (Ufgets(big_buffer, big_buffer_size, trust_list))
2406 uschar *start = big_buffer, *nl;
2407 while (*start && isspace(*start))
2411 nl = Ustrchr(start, '\n');
2414 trusted_configs[nr_configs++] = string_copy(start);
2415 if (nr_configs == 32)
2423 const uschar *list = argrest;
2425 while (f.trusted_config && (filename = string_nextinlist(&list,
2426 &sep, big_buffer, big_buffer_size)) != NULL)
2428 for (i=0; i < nr_configs; i++)
2429 if (Ustrcmp(filename, trusted_configs[i]) == 0)
2431 if (i == nr_configs)
2433 f.trusted_config = FALSE;
2438 else /* No valid prefixes found in trust_list file. */
2439 f.trusted_config = FALSE;
2440 store_reset(reset_point);
2443 else /* Could not open trust_list file. */
2444 f.trusted_config = FALSE;
2447 /* Not root; don't trust config */
2448 f.trusted_config = FALSE;
2452 config_main_filelist = argrest;
2453 f.config_changed = TRUE;
2458 /* -D: set up a macro definition */
2461 #ifdef DISABLE_D_OPTION
2462 exim_fail("exim: -D is not available in this Exim binary\n");
2468 uschar *s = argrest;
2471 while (isspace(*s)) s++;
2473 if (*s < 'A' || *s > 'Z')
2474 exim_fail("exim: macro name set by -D must start with "
2475 "an upper case letter\n");
2477 while (isalnum(*s) || *s == '_')
2479 if (ptr < sizeof(name)-1) name[ptr++] = *s;
2483 if (ptr == 0) { badarg = TRUE; break; }
2484 while (isspace(*s)) s++;
2487 if (*s++ != '=') { badarg = TRUE; break; }
2488 while (isspace(*s)) s++;
2491 for (m = macros_user; m; m = m->next)
2492 if (Ustrcmp(m->name, name) == 0)
2493 exim_fail("exim: duplicated -D in command line\n");
2495 m = macro_create(name, s, TRUE);
2497 if (clmacro_count >= MAX_CLMACROS)
2498 exim_fail("exim: too many -D options on command line\n");
2499 clmacros[clmacro_count++] =
2500 string_sprintf("-D%s=%s", m->name, m->replacement);
2505 /* -d: Set debug level (see also -v below) or set the drop_cr option.
2506 The latter is now a no-op, retained for compatibility only. If -dd is used,
2507 debugging subprocesses of the daemon is disabled. */
2510 if (Ustrcmp(argrest, "ropcr") == 0)
2512 /* drop_cr = TRUE; */
2515 /* Use an intermediate variable so that we don't set debugging while
2516 decoding the debugging bits. */
2520 unsigned int selector = D_default;
2523 if (*argrest == 'd')
2525 f.debug_daemon = TRUE;
2529 decode_bits(&selector, 1, debug_notall, argrest,
2530 debug_options, debug_options_count, US"debug", 0);
2531 debug_selector = selector;
2536 /* -E: This is a local error message. This option is not intended for
2537 external use at all, but is not restricted to trusted callers because it
2538 does no harm (just suppresses certain error messages) and if Exim is run
2539 not setuid root it won't always be trusted when it generates error
2540 messages using this option. If there is a message id following -E, point
2541 message_reference at it, for logging. */
2544 f.local_error_message = TRUE;
2545 if (mac_ismsgid(argrest)) message_reference = argrest;
2549 /* -ex: The vacation program calls sendmail with the undocumented "-eq"
2550 option, so it looks as if historically the -oex options are also callable
2551 without the leading -o. So we have to accept them. Before the switch,
2552 anything starting -oe has been converted to -e. Exim does not support all
2553 of the sendmail error options. */
2556 if (Ustrcmp(argrest, "e") == 0)
2558 arg_error_handling = ERRORS_SENDER;
2559 errors_sender_rc = EXIT_SUCCESS;
2561 else if (Ustrcmp(argrest, "m") == 0) arg_error_handling = ERRORS_SENDER;
2562 else if (Ustrcmp(argrest, "p") == 0) arg_error_handling = ERRORS_STDERR;
2563 else if (Ustrcmp(argrest, "q") == 0) arg_error_handling = ERRORS_STDERR;
2564 else if (Ustrcmp(argrest, "w") == 0) arg_error_handling = ERRORS_SENDER;
2569 /* -F: Set sender's full name, used instead of the gecos entry from
2570 the password file. Since users can usually alter their gecos entries,
2571 there's no security involved in using this instead. The data can follow
2572 the -F or be in the next argument. */
2577 if(++i < argc) argrest = argv[i]; else
2578 { badarg = TRUE; break; }
2580 originator_name = argrest;
2581 f.sender_name_forced = TRUE;
2585 /* -f: Set sender's address - this value is only actually used if Exim is
2586 run by a trusted user, or if untrusted_set_sender is set and matches the
2587 address, except that the null address can always be set by any user. The
2588 test for this happens later, when the value given here is ignored when not
2589 permitted. For an untrusted user, the actual sender is still put in Sender:
2590 if it doesn't match the From: header (unless no_local_from_check is set).
2591 The data can follow the -f or be in the next argument. The -r switch is an
2592 obsolete form of -f but since there appear to be programs out there that
2593 use anything that sendmail has ever supported, better accept it - the
2594 synonymizing is done before the switch above.
2596 At this stage, we must allow domain literal addresses, because we don't
2597 know what the setting of allow_domain_literals is yet. Ditto for trailing
2598 dots and strip_trailing_dot. */
2602 int dummy_start, dummy_end;
2606 if (i+1 < argc) argrest = argv[++i]; else
2607 { badarg = TRUE; break; }
2610 *(sender_address = store_get(1, FALSE)) = '\0'; /* Ensure writeable memory */
2613 uschar *temp = argrest + Ustrlen(argrest) - 1;
2614 while (temp >= argrest && isspace(*temp)) temp--;
2615 if (temp >= argrest && *temp == '.') f_end_dot = TRUE;
2616 allow_domain_literals = TRUE;
2617 strip_trailing_dot = TRUE;
2619 allow_utf8_domains = TRUE;
2621 sender_address = parse_extract_address(argrest, &errmess,
2622 &dummy_start, &dummy_end, &sender_address_domain, TRUE);
2623 sender_address = string_copy_taint(sender_address, TRUE);
2625 message_smtputf8 = string_is_utf8(sender_address);
2626 allow_utf8_domains = FALSE;
2628 allow_domain_literals = FALSE;
2629 strip_trailing_dot = FALSE;
2630 if (!sender_address)
2631 exim_fail("exim: bad -f address \"%s\": %s\n", argrest, errmess);
2633 f.sender_address_forced = TRUE;
2637 /* -G: sendmail invocation to specify that it's a gateway submission and
2638 sendmail may complain about problems instead of fixing them.
2639 We make it equivalent to an ACL "control = suppress_local_fixups" and do
2640 not at this time complain about problems. */
2646 /* -h: Set the hop count for an incoming message. Exim does not currently
2647 support this; it always computes it by counting the Received: headers.
2648 To put it in will require a change to the spool header file format. */
2653 if(++i < argc) argrest = argv[i]; else
2654 { badarg = TRUE; break; }
2656 if (!isdigit(*argrest)) badarg = TRUE;
2660 /* -i: Set flag so dot doesn't end non-SMTP input (same as -oi, seems
2661 not to be documented for sendmail but mailx (at least) uses it) */
2664 if (*argrest == 0) f.dot_ends = FALSE; else badarg = TRUE;
2668 /* -L: set the identifier used for syslog; equivalent to setting
2669 syslog_processname in the config file, but needs to be an admin option. */
2672 if (*argrest == '\0')
2674 if(++i < argc) argrest = argv[i]; else
2675 { badarg = TRUE; break; }
2677 if ((sz = Ustrlen(argrest)) > 32)
2678 exim_fail("exim: the -L syslog name is too long: \"%s\"\n", argrest);
2680 exim_fail("exim: the -L syslog name is too short\n");
2681 cmdline_syslog_name = argrest;
2685 receiving_message = FALSE;
2687 /* -MC: continue delivery of another message via an existing open
2688 file descriptor. This option is used for an internal call by the
2689 smtp transport when there is a pending message waiting to go to an
2690 address to which it has got a connection. Five subsequent arguments are
2691 required: transport name, host name, IP address, sequence number, and
2692 message_id. Transports may decline to create new processes if the sequence
2693 number gets too big. The channel is stdin. This (-MC) must be the last
2694 argument. There's a subsequent check that the real-uid is privileged.
2696 If we are running in the test harness. delay for a bit, to let the process
2697 that set this one up complete. This makes for repeatability of the logging,
2700 if (Ustrcmp(argrest, "C") == 0)
2702 union sockaddr_46 interface_sock;
2703 EXIM_SOCKLEN_T size = sizeof(interface_sock);
2706 exim_fail("exim: too many or too few arguments after -MC\n");
2708 if (msg_action_arg >= 0)
2709 exim_fail("exim: incompatible arguments\n");
2711 continue_transport = argv[++i];
2712 continue_hostname = argv[++i];
2713 continue_host_address = argv[++i];
2714 continue_sequence = Uatoi(argv[++i]);
2715 msg_action = MSG_DELIVER;
2716 msg_action_arg = ++i;
2717 forced_delivery = TRUE;
2718 queue_run_pid = passed_qr_pid;
2719 queue_run_pipe = passed_qr_pipe;
2721 if (!mac_ismsgid(argv[i]))
2722 exim_fail("exim: malformed message id %s after -MC option\n",
2725 /* Set up $sending_ip_address and $sending_port, unless proxied */
2727 if (!continue_proxy_cipher)
2728 if (getsockname(fileno(stdin), (struct sockaddr *)(&interface_sock),
2730 sending_ip_address = host_ntoa(-1, &interface_sock, NULL,
2733 exim_fail("exim: getsockname() failed after -MC option: %s\n",
2736 testharness_pause_ms(500);
2740 else if (*argrest == 'C' && argrest[1] && !argrest[2])
2744 /* -MCA: set the smtp_authenticated flag; this is useful only when it
2745 precedes -MC (see above). The flag indicates that the host to which
2746 Exim is connected has accepted an AUTH sequence. */
2748 case 'A': f.smtp_authenticated = TRUE; break;
2750 /* -MCD: set the smtp_use_dsn flag; this indicates that the host
2751 that exim is connected to supports the esmtp extension DSN */
2753 case 'D': smtp_peer_options |= OPTION_DSN; break;
2755 /* -MCG: set the queue name, to a non-default value */
2757 case 'G': if (++i < argc) queue_name = string_copy(argv[i]);
2761 /* -MCK: the peer offered CHUNKING. Must precede -MC */
2763 case 'K': smtp_peer_options |= OPTION_CHUNKING; break;
2765 /* -MCP: set the smtp_use_pipelining flag; this is useful only when
2766 it preceded -MC (see above) */
2768 case 'P': smtp_peer_options |= OPTION_PIPE; break;
2770 /* -MCQ: pass on the pid of the queue-running process that started
2771 this chain of deliveries and the fd of its synchronizing pipe; this
2772 is useful only when it precedes -MC (see above) */
2774 case 'Q': if (++i < argc) passed_qr_pid = (pid_t)(Uatol(argv[i]));
2776 if (++i < argc) passed_qr_pipe = (int)(Uatol(argv[i]));
2780 /* -MCS: set the smtp_use_size flag; this is useful only when it
2781 precedes -MC (see above) */
2783 case 'S': smtp_peer_options |= OPTION_SIZE; break;
2786 /* -MCt: similar to -MCT below but the connection is still open
2787 via a proxy process which handles the TLS context and coding.
2788 Require three arguments for the proxied local address and port,
2789 and the TLS cipher. */
2791 case 't': if (++i < argc) sending_ip_address = argv[i];
2793 if (++i < argc) sending_port = (int)(Uatol(argv[i]));
2795 if (++i < argc) continue_proxy_cipher = argv[i];
2799 /* -MCT: set the tls_offered flag; this is useful only when it
2800 precedes -MC (see above). The flag indicates that the host to which
2801 Exim is connected has offered TLS support. */
2803 case 'T': smtp_peer_options |= OPTION_TLS; break;
2806 default: badarg = TRUE; break;
2811 /* -M[x]: various operations on the following list of message ids:
2812 -M deliver the messages, ignoring next retry times and thawing
2813 -Mc deliver the messages, checking next retry times, no thawing
2814 -Mf freeze the messages
2815 -Mg give up on the messages
2816 -Mt thaw the messages
2817 -Mrm remove the messages
2818 In the above cases, this must be the last option. There are also the
2819 following options which are followed by a single message id, and which
2820 act on that message. Some of them use the "recipient" addresses as well.
2821 -Mar add recipient(s)
2822 -Mmad mark all recipients delivered
2823 -Mmd mark recipients(s) delivered
2825 -Mset load a message for use with -be
2827 -Mvc show copy (of whole message, in RFC 2822 format)
2832 else if (*argrest == 0)
2834 msg_action = MSG_DELIVER;
2835 forced_delivery = f.deliver_force_thaw = TRUE;
2837 else if (Ustrcmp(argrest, "ar") == 0)
2839 msg_action = MSG_ADD_RECIPIENT;
2840 one_msg_action = TRUE;
2842 else if (Ustrcmp(argrest, "c") == 0) msg_action = MSG_DELIVER;
2843 else if (Ustrcmp(argrest, "es") == 0)
2845 msg_action = MSG_EDIT_SENDER;
2846 one_msg_action = TRUE;
2848 else if (Ustrcmp(argrest, "f") == 0) msg_action = MSG_FREEZE;
2849 else if (Ustrcmp(argrest, "g") == 0)
2851 msg_action = MSG_DELIVER;
2852 deliver_give_up = TRUE;
2854 else if (Ustrcmp(argrest, "G") == 0)
2856 msg_action = MSG_SETQUEUE;
2857 queue_name_dest = argv[++i];
2859 else if (Ustrcmp(argrest, "mad") == 0)
2861 msg_action = MSG_MARK_ALL_DELIVERED;
2863 else if (Ustrcmp(argrest, "md") == 0)
2865 msg_action = MSG_MARK_DELIVERED;
2866 one_msg_action = TRUE;
2868 else if (Ustrcmp(argrest, "rm") == 0) msg_action = MSG_REMOVE;
2869 else if (Ustrcmp(argrest, "set") == 0)
2871 msg_action = MSG_LOAD;
2872 one_msg_action = TRUE;
2874 else if (Ustrcmp(argrest, "t") == 0) msg_action = MSG_THAW;
2875 else if (Ustrcmp(argrest, "vb") == 0)
2877 msg_action = MSG_SHOW_BODY;
2878 one_msg_action = TRUE;
2880 else if (Ustrcmp(argrest, "vc") == 0)
2882 msg_action = MSG_SHOW_COPY;
2883 one_msg_action = TRUE;
2885 else if (Ustrcmp(argrest, "vh") == 0)
2887 msg_action = MSG_SHOW_HEADER;
2888 one_msg_action = TRUE;
2890 else if (Ustrcmp(argrest, "vl") == 0)
2892 msg_action = MSG_SHOW_LOG;
2893 one_msg_action = TRUE;
2895 else { badarg = TRUE; break; }
2897 /* All the -Mxx options require at least one message id. */
2899 msg_action_arg = i + 1;
2900 if (msg_action_arg >= argc)
2901 exim_fail("exim: no message ids given after %s option\n", arg);
2903 /* Some require only message ids to follow */
2905 if (!one_msg_action)
2907 for (int j = msg_action_arg; j < argc; j++) if (!mac_ismsgid(argv[j]))
2908 exim_fail("exim: malformed message id %s after %s option\n",
2910 goto END_ARG; /* Remaining args are ids */
2913 /* Others require only one message id, possibly followed by addresses,
2914 which will be handled as normal arguments. */
2918 if (!mac_ismsgid(argv[msg_action_arg]))
2919 exim_fail("exim: malformed message id %s after %s option\n",
2920 argv[msg_action_arg], arg);
2926 /* Some programs seem to call the -om option without the leading o;
2927 for sendmail it askes for "me too". Exim always does this. */
2930 if (*argrest != 0) badarg = TRUE;
2934 /* -N: don't do delivery - a debugging option that stops transports doing
2935 their thing. It implies debugging at the D_v level. */
2940 f.dont_deliver = TRUE;
2941 debug_selector |= D_v;
2942 debug_file = stderr;
2948 /* -n: This means "don't alias" in sendmail, apparently.
2949 For normal invocations, it has no effect.
2950 It may affect some other options. */
2956 /* -O: Just ignore it. In sendmail, apparently -O option=value means set
2957 option to the specified value. This form uses long names. We need to handle
2958 -O option=value and -Ooption=value. */
2964 exim_fail("exim: string expected after -O\n");
2970 /* -oA: Set an argument for the bi command (sendmail's "alternate alias
2973 if (*argrest == 'A')
2975 alias_arg = argrest + 1;
2976 if (alias_arg[0] == 0)
2978 if (i+1 < argc) alias_arg = argv[++i]; else
2979 exim_fail("exim: string expected after -oA\n");
2983 /* -oB: Set a connection message max value for remote deliveries */
2985 else if (*argrest == 'B')
2987 uschar *p = argrest + 1;
2990 if (i+1 < argc && isdigit((argv[i+1][0]))) p = argv[++i]; else
2992 connection_max_messages = 1;
3000 exim_fail("exim: number expected after -oB\n");
3001 connection_max_messages = Uatoi(p);
3005 /* -odb: background delivery */
3007 else if (Ustrcmp(argrest, "db") == 0)
3009 f.synchronous_delivery = FALSE;
3010 arg_queue_only = FALSE;
3011 queue_only_set = TRUE;
3014 /* -odf: foreground delivery (smail-compatible option); same effect as
3015 -odi: interactive (synchronous) delivery (sendmail-compatible option)
3018 else if (Ustrcmp(argrest, "df") == 0 || Ustrcmp(argrest, "di") == 0)
3020 f.synchronous_delivery = TRUE;
3021 arg_queue_only = FALSE;
3022 queue_only_set = TRUE;
3025 /* -odq: queue only */
3027 else if (Ustrcmp(argrest, "dq") == 0)
3029 f.synchronous_delivery = FALSE;
3030 arg_queue_only = TRUE;
3031 queue_only_set = TRUE;
3034 /* -odqs: queue SMTP only - do local deliveries and remote routing,
3035 but no remote delivery */
3037 else if (Ustrcmp(argrest, "dqs") == 0)
3039 f.queue_smtp = TRUE;
3040 arg_queue_only = FALSE;
3041 queue_only_set = TRUE;
3044 /* -oex: Sendmail error flags. As these are also accepted without the
3045 leading -o prefix, for compatibility with vacation and other callers,
3046 they are handled with -e above. */
3048 /* -oi: Set flag so dot doesn't end non-SMTP input (same as -i)
3049 -oitrue: Another sendmail syntax for the same */
3051 else if (Ustrcmp(argrest, "i") == 0 ||
3052 Ustrcmp(argrest, "itrue") == 0)
3055 /* -oM*: Set various characteristics for an incoming message; actually
3056 acted on for trusted callers only. */
3058 else if (*argrest == 'M')
3061 exim_fail("exim: data expected after -o%s\n", argrest);
3063 /* -oMa: Set sender host address */
3065 if (Ustrcmp(argrest, "Ma") == 0) sender_host_address = argv[++i];
3067 /* -oMaa: Set authenticator name */
3069 else if (Ustrcmp(argrest, "Maa") == 0)
3070 sender_host_authenticated = argv[++i];
3072 /* -oMas: setting authenticated sender */
3074 else if (Ustrcmp(argrest, "Mas") == 0)
3075 authenticated_sender = string_copy_taint(argv[++i], TRUE);
3077 /* -oMai: setting authenticated id */
3079 else if (Ustrcmp(argrest, "Mai") == 0)
3080 authenticated_id = string_copy_taint(argv[++i], TRUE);
3082 /* -oMi: Set incoming interface address */
3084 else if (Ustrcmp(argrest, "Mi") == 0) interface_address = argv[++i];
3086 /* -oMm: Message reference */
3088 else if (Ustrcmp(argrest, "Mm") == 0)
3090 if (!mac_ismsgid(argv[i+1]))
3091 exim_fail("-oMm must be a valid message ID\n");
3092 if (!f.trusted_config)
3093 exim_fail("-oMm must be called by a trusted user/config\n");
3094 message_reference = argv[++i];
3097 /* -oMr: Received protocol */
3099 else if (Ustrcmp(argrest, "Mr") == 0)
3101 if (received_protocol)
3102 exim_fail("received_protocol is set already\n");
3104 received_protocol = argv[++i];
3106 /* -oMs: Set sender host name */
3108 else if (Ustrcmp(argrest, "Ms") == 0)
3109 sender_host_name = string_copy_taint(argv[++i], TRUE);
3111 /* -oMt: Set sender ident */
3113 else if (Ustrcmp(argrest, "Mt") == 0)
3115 sender_ident_set = TRUE;
3116 sender_ident = argv[++i];
3119 /* Else a bad argument */
3128 /* -om: Me-too flag for aliases. Exim always does this. Some programs
3129 seem to call this as -m (undocumented), so that is also accepted (see
3132 else if (Ustrcmp(argrest, "m") == 0) {}
3134 /* -oo: An ancient flag for old-style addresses which still seems to
3135 crop up in some calls (see in SCO). */
3137 else if (Ustrcmp(argrest, "o") == 0) {}
3139 /* -oP <name>: set pid file path for daemon
3140 -oPX: delete pid file of daemon */
3142 else if (Ustrcmp(argrest, "P") == 0)
3143 override_pid_file_path = argv[++i];
3145 else if (Ustrcmp(argrest, "PX") == 0)
3148 /* -or <n>: set timeout for non-SMTP acceptance
3149 -os <n>: set timeout for SMTP acceptance */
3151 else if (*argrest == 'r' || *argrest == 's')
3153 int *tp = (*argrest == 'r')?
3154 &arg_receive_timeout : &arg_smtp_receive_timeout;
3155 if (argrest[1] == 0)
3157 if (i+1 < argc) *tp= readconf_readtime(argv[++i], 0, FALSE);
3159 else *tp = readconf_readtime(argrest + 1, 0, FALSE);
3161 exim_fail("exim: bad time value %s: abandoned\n", argv[i]);
3164 /* -oX <list>: Override local_interfaces and/or default daemon ports */
3166 else if (Ustrcmp(argrest, "X") == 0)
3167 override_local_interfaces = argv[++i];
3169 /* Unknown -o argument */
3175 /* -ps: force Perl startup; -pd force delayed Perl startup */
3179 if (*argrest == 's' && argrest[1] == 0)
3181 perl_start_option = 1;
3184 if (*argrest == 'd' && argrest[1] == 0)
3186 perl_start_option = -1;
3191 /* -panythingelse is taken as the Sendmail-compatible argument -prval:sval,
3192 which sets the host protocol and host name */
3196 argrest = argv[++i];
3198 { badarg = TRUE; break; }
3204 if (received_protocol)
3205 exim_fail("received_protocol is set already\n");
3207 hn = Ustrchr(argrest, ':');
3209 received_protocol = argrest;
3212 int old_pool = store_pool;
3213 store_pool = POOL_PERM;
3214 received_protocol = string_copyn(argrest, hn - argrest);
3215 store_pool = old_pool;
3216 sender_host_name = hn + 1;
3223 receiving_message = FALSE;
3224 if (queue_interval >= 0)
3225 exim_fail("exim: -q specified more than once\n");
3227 /* -qq...: Do queue runs in a 2-stage manner */
3229 if (*argrest == 'q')
3231 f.queue_2stage = TRUE;
3235 /* -qi...: Do only first (initial) deliveries */
3237 if (*argrest == 'i')
3239 f.queue_run_first_delivery = TRUE;
3243 /* -qf...: Run the queue, forcing deliveries
3244 -qff..: Ditto, forcing thawing as well */
3246 if (*argrest == 'f')
3248 f.queue_run_force = TRUE;
3249 if (*++argrest == 'f')
3251 f.deliver_force_thaw = TRUE;
3256 /* -q[f][f]l...: Run the queue only on local deliveries */
3258 if (*argrest == 'l')
3260 f.queue_run_local = TRUE;
3264 /* -q[f][f][l][G<name>]... Work on the named queue */
3266 if (*argrest == 'G')
3269 for (argrest++, i = 0; argrest[i] && argrest[i] != '/'; ) i++;
3270 queue_name = string_copyn(argrest, i);
3272 if (*argrest == '/') argrest++;
3275 /* -q[f][f][l][G<name>]: Run the queue, optionally forced, optionally local
3276 only, optionally named, optionally starting from a given message id. */
3278 if (!(list_queue || count_queue))
3280 && (i + 1 >= argc || argv[i+1][0] == '-' || mac_ismsgid(argv[i+1])))
3283 if (i+1 < argc && mac_ismsgid(argv[i+1]))
3284 start_queue_run_id = argv[++i];
3285 if (i+1 < argc && mac_ismsgid(argv[i+1]))
3286 stop_queue_run_id = argv[++i];
3289 /* -q[f][f][l][G<name>/]<n>: Run the queue at regular intervals, optionally
3290 forced, optionally local only, optionally named. */
3292 else if ((queue_interval = readconf_readtime(*argrest ? argrest : argv[++i],
3294 exim_fail("exim: bad time value %s: abandoned\n", argv[i]);
3298 case 'R': /* Synonymous with -qR... */
3299 receiving_message = FALSE;
3301 /* -Rf: As -R (below) but force all deliveries,
3302 -Rff: Ditto, but also thaw all frozen messages,
3303 -Rr: String is regex
3304 -Rrf: Regex and force
3305 -Rrff: Regex and force and thaw
3307 in all cases provided there are no further characters in this
3311 for (int i = 0; i < nelem(rsopts); i++)
3312 if (Ustrcmp(argrest, rsopts[i]) == 0)
3314 if (i != 2) f.queue_run_force = TRUE;
3315 if (i >= 2) f.deliver_selectstring_regex = TRUE;
3316 if (i == 1 || i == 4) f.deliver_force_thaw = TRUE;
3317 argrest += Ustrlen(rsopts[i]);
3320 /* -R: Set string to match in addresses for forced queue run to
3321 pick out particular messages. */
3324 deliver_selectstring = argrest;
3325 else if (i+1 < argc)
3326 deliver_selectstring = argv[++i];
3328 exim_fail("exim: string expected after -R\n");
3332 /* -r: an obsolete synonym for -f (see above) */
3335 /* -S: Like -R but works on sender. */
3337 case 'S': /* Synonymous with -qS... */
3338 receiving_message = FALSE;
3340 /* -Sf: As -S (below) but force all deliveries,
3341 -Sff: Ditto, but also thaw all frozen messages,
3342 -Sr: String is regex
3343 -Srf: Regex and force
3344 -Srff: Regex and force and thaw
3346 in all cases provided there are no further characters in this
3350 for (int i = 0; i < nelem(rsopts); i++)
3351 if (Ustrcmp(argrest, rsopts[i]) == 0)
3353 if (i != 2) f.queue_run_force = TRUE;
3354 if (i >= 2) f.deliver_selectstring_sender_regex = TRUE;
3355 if (i == 1 || i == 4) f.deliver_force_thaw = TRUE;
3356 argrest += Ustrlen(rsopts[i]);
3359 /* -S: Set string to match in addresses for forced queue run to
3360 pick out particular messages. */
3363 deliver_selectstring_sender = argrest;
3364 else if (i+1 < argc)
3365 deliver_selectstring_sender = argv[++i];
3367 exim_fail("exim: string expected after -S\n");
3370 /* -Tqt is an option that is exclusively for use by the testing suite.
3371 It is not recognized in other circumstances. It allows for the setting up
3372 of explicit "queue times" so that various warning/retry things can be
3373 tested. Otherwise variability of clock ticks etc. cause problems. */
3376 if (f.running_in_test_harness && Ustrcmp(argrest, "qt") == 0)
3377 fudged_queue_times = argv[++i];
3382 /* -t: Set flag to extract recipients from body of message. */
3385 if (*argrest == 0) extract_recipients = TRUE;
3387 /* -ti: Set flag to extract recipients from body of message, and also
3388 specify that dot does not end the message. */
3390 else if (Ustrcmp(argrest, "i") == 0)
3392 extract_recipients = TRUE;
3396 /* -tls-on-connect: don't wait for STARTTLS (for old clients) */
3399 else if (Ustrcmp(argrest, "ls-on-connect") == 0) tls_in.on_connect = TRUE;
3406 /* -U: This means "initial user submission" in sendmail, apparently. The
3407 doc claims that in future sendmail may refuse syntactically invalid
3408 messages instead of fixing them. For the moment, we just ignore it. */
3414 /* -v: verify things - this is a very low-level debugging */
3419 debug_selector |= D_v;
3420 debug_file = stderr;
3426 /* -x: AIX uses this to indicate some fancy 8-bit character stuff:
3428 The -x flag tells the sendmail command that mail from a local
3429 mail program has National Language Support (NLS) extended characters
3430 in the body of the mail item. The sendmail command can send mail with
3431 extended NLS characters across networks that normally corrupts these
3434 As Exim is 8-bit clean, it just ignores this flag. */
3437 if (*argrest != 0) badarg = TRUE;
3440 /* -X: in sendmail: takes one parameter, logfile, and sends debugging
3441 logs to that file. We swallow the parameter and otherwise ignore it. */
3444 if (*argrest == '\0')
3446 exim_fail("exim: string expected after -X\n");
3450 if (*argrest == '\0')
3452 log_oneline = argv[i];
3454 exim_fail("exim: file name expected after %s\n", argv[i-1]);
3457 /* All other initial characters are errors */
3462 } /* End of high-level switch statement */
3464 /* Failed to recognize the option, or syntax error */
3467 exim_fail("exim abandoned: unknown, malformed, or incomplete "
3468 "option %s\n", arg);
3472 /* If -R or -S have been specified without -q, assume a single queue run. */
3474 if ( (deliver_selectstring || deliver_selectstring_sender)
3475 && queue_interval < 0)
3480 /* If usage_wanted is set we call the usage function - which never returns */
3481 if (usage_wanted) exim_usage(called_as);
3483 /* Arguments have been processed. Check for incompatibilities. */
3485 (smtp_input || extract_recipients || recipients_arg < argc) &&
3486 (f.daemon_listen || queue_interval >= 0 || bi_option ||
3487 test_retry_arg >= 0 || test_rewrite_arg >= 0 ||
3488 filter_test != FTEST_NONE || (msg_action_arg > 0 && !one_msg_action))
3491 msg_action_arg > 0 &&
3492 (f.daemon_listen || queue_interval > 0 || list_options ||
3493 (checking && msg_action != MSG_LOAD) ||
3494 bi_option || test_retry_arg >= 0 || test_rewrite_arg >= 0)
3497 (f.daemon_listen || queue_interval > 0) &&
3498 (sender_address != NULL || list_options || list_queue || checking ||
3502 f.daemon_listen && queue_interval == 0
3505 f.inetd_wait_mode && queue_interval >= 0
3509 (checking || smtp_input || extract_recipients ||
3510 filter_test != FTEST_NONE || bi_option)
3513 verify_address_mode &&
3514 (f.address_test_mode || smtp_input || extract_recipients ||
3515 filter_test != FTEST_NONE || bi_option)
3518 f.address_test_mode && (smtp_input || extract_recipients ||
3519 filter_test != FTEST_NONE || bi_option)
3522 smtp_input && (sender_address != NULL || filter_test != FTEST_NONE ||
3526 deliver_selectstring != NULL && queue_interval < 0
3529 msg_action == MSG_LOAD &&
3530 (!expansion_test || expansion_test_message != NULL)
3533 exim_fail("exim: incompatible command-line options or arguments\n");
3535 /* If debugging is set up, set the file and the file descriptor to pass on to
3536 child processes. It should, of course, be 2 for stderr. Also, force the daemon
3537 to run in the foreground. */
3539 if (debug_selector != 0)
3541 debug_file = stderr;
3542 debug_fd = fileno(debug_file);
3543 f.background_daemon = FALSE;
3544 testharness_pause_ms(100); /* lets caller finish */
3545 if (debug_selector != D_v) /* -v only doesn't show this */
3547 debug_printf("Exim version %s uid=%ld gid=%ld pid=%d D=%x\n",
3548 version_string, (long int)real_uid, (long int)real_gid, (int)getpid(),
3550 if (!version_printed)
3551 show_whats_supported(stderr);
3555 /* When started with root privilege, ensure that the limits on the number of
3556 open files and the number of processes (where that is accessible) are
3557 sufficiently large, or are unset, in case Exim has been called from an
3558 environment where the limits are screwed down. Not all OS have the ability to
3559 change some of these limits. */
3563 DEBUG(D_any) debug_print_ids(US"Exim has no root privilege:");
3569 #ifdef RLIMIT_NOFILE
3570 if (getrlimit(RLIMIT_NOFILE, &rlp) < 0)
3572 log_write(0, LOG_MAIN|LOG_PANIC, "getrlimit(RLIMIT_NOFILE) failed: %s",
3574 rlp.rlim_cur = rlp.rlim_max = 0;
3577 /* I originally chose 1000 as a nice big number that was unlikely to
3578 be exceeded. It turns out that some older OS have a fixed upper limit of
3581 if (rlp.rlim_cur < 1000)
3583 rlp.rlim_cur = rlp.rlim_max = 1000;
3584 if (setrlimit(RLIMIT_NOFILE, &rlp) < 0)
3586 rlp.rlim_cur = rlp.rlim_max = 256;
3587 if (setrlimit(RLIMIT_NOFILE, &rlp) < 0)
3588 log_write(0, LOG_MAIN|LOG_PANIC, "setrlimit(RLIMIT_NOFILE) failed: %s",
3595 if (getrlimit(RLIMIT_NPROC, &rlp) < 0)
3597 log_write(0, LOG_MAIN|LOG_PANIC, "getrlimit(RLIMIT_NPROC) failed: %s",
3599 rlp.rlim_cur = rlp.rlim_max = 0;
3602 #ifdef RLIM_INFINITY
3603 if (rlp.rlim_cur != RLIM_INFINITY && rlp.rlim_cur < 1000)
3605 rlp.rlim_cur = rlp.rlim_max = RLIM_INFINITY;
3607 if (rlp.rlim_cur < 1000)
3609 rlp.rlim_cur = rlp.rlim_max = 1000;
3611 if (setrlimit(RLIMIT_NPROC, &rlp) < 0)
3612 log_write(0, LOG_MAIN|LOG_PANIC, "setrlimit(RLIMIT_NPROC) failed: %s",
3618 /* Exim is normally entered as root (but some special configurations are
3619 possible that don't do this). However, it always spins off sub-processes that
3620 set their uid and gid as required for local delivery. We don't want to pass on
3621 any extra groups that root may belong to, so we want to get rid of them all at
3624 We need to obey setgroups() at this stage, before possibly giving up root
3625 privilege for a changed configuration file, but later on we might need to
3626 check on the additional groups for the admin user privilege - can't do that
3627 till after reading the config, which might specify the exim gid. Therefore,
3628 save the group list here first. */
3630 if ((group_count = getgroups(nelem(group_list), group_list)) < 0)
3631 exim_fail("exim: getgroups() failed: %s\n", strerror(errno));
3633 /* There is a fundamental difference in some BSD systems in the matter of
3634 groups. FreeBSD and BSDI are known to be different; NetBSD and OpenBSD are
3635 known not to be different. On the "different" systems there is a single group
3636 list, and the first entry in it is the current group. On all other versions of
3637 Unix there is a supplementary group list, which is in *addition* to the current
3638 group. Consequently, to get rid of all extraneous groups on a "standard" system
3639 you pass over 0 groups to setgroups(), while on a "different" system you pass
3640 over a single group - the current group, which is always the first group in the
3641 list. Calling setgroups() with zero groups on a "different" system results in
3642 an error return. The following code should cope with both types of system.
3644 Unfortunately, recent MacOS, which should be a FreeBSD, "helpfully" succeeds
3645 the "setgroups() with zero groups" - and changes the egid.
3646 Thanks to that we had to stash the original_egid above, for use below
3647 in the call to exim_setugid().
3649 However, if this process isn't running as root, setgroups() can't be used
3650 since you have to be root to run it, even if throwing away groups.
3651 Except, sigh, for Hurd - where you can.
3652 Not being root here happens only in some unusual configurations. */
3655 #ifndef OS_SETGROUPS_ZERO_DROPS_ALL
3656 && setgroups(0, NULL) != 0
3658 && setgroups(1, group_list) != 0)
3659 exim_fail("exim: setgroups() failed: %s\n", strerror(errno));
3661 /* If the configuration file name has been altered by an argument on the
3662 command line (either a new file name or a macro definition) and the caller is
3663 not root, or if this is a filter testing run, remove any setuid privilege the
3664 program has and run as the underlying user.
3666 The exim user is locked out of this, which severely restricts the use of -C
3669 Otherwise, set the real ids to the effective values (should be root unless run
3670 from inetd, which it can either be root or the exim uid, if one is configured).
3672 There is a private mechanism for bypassing some of this, in order to make it
3673 possible to test lots of configurations automatically, without having either to
3674 recompile each time, or to patch in an actual configuration file name and other
3675 values (such as the path name). If running in the test harness, pretend that
3676 configuration file changes and macro definitions haven't happened. */
3679 (!f.trusted_config || /* Config changed, or */
3680 !macros_trusted(opt_D_used)) && /* impermissible macros and */
3681 real_uid != root_uid && /* Not root, and */
3682 !f.running_in_test_harness /* Not fudged */
3684 expansion_test /* expansion testing */
3686 filter_test != FTEST_NONE) /* Filter testing */
3688 setgroups(group_count, group_list);
3689 exim_setugid(real_uid, real_gid, FALSE,
3690 US"-C, -D, -be or -bf forces real uid");
3691 removed_privilege = TRUE;
3693 /* In the normal case when Exim is called like this, stderr is available
3694 and should be used for any logging information because attempts to write
3695 to the log will usually fail. To arrange this, we unset really_exim. However,
3696 if no stderr is available there is no point - we might as well have a go
3697 at the log (if it fails, syslog will be written).
3699 Note that if the invoker is Exim, the logs remain available. Messing with
3700 this causes unlogged successful deliveries. */
3702 if (log_stderr && real_uid != exim_uid)
3703 f.really_exim = FALSE;
3706 /* Privilege is to be retained for the moment. It may be dropped later,
3707 depending on the job that this Exim process has been asked to do. For now, set
3708 the real uid to the effective so that subsequent re-execs of Exim are done by a
3712 exim_setugid(geteuid(), original_egid, FALSE, US"forcing real = effective");
3714 /* If testing a filter, open the file(s) now, before wasting time doing other
3715 setups and reading the message. */
3717 if (filter_test & FTEST_SYSTEM)
3718 if ((filter_sfd = Uopen(filter_test_sfile, O_RDONLY, 0)) < 0)
3719 exim_fail("exim: failed to open %s: %s\n", filter_test_sfile,
3722 if (filter_test & FTEST_USER)
3723 if ((filter_ufd = Uopen(filter_test_ufile, O_RDONLY, 0)) < 0)
3724 exim_fail("exim: failed to open %s: %s\n", filter_test_ufile,
3727 /* Initialise lookup_list
3728 If debugging, already called above via version reporting.
3729 In either case, we initialise the list of available lookups while running
3730 as root. All dynamically modules are loaded from a directory which is
3731 hard-coded into the binary and is code which, if not a module, would be
3732 part of Exim already. Ability to modify the content of the directory
3733 is equivalent to the ability to modify a setuid binary!
3735 This needs to happen before we read the main configuration. */
3739 if (f.running_in_test_harness) smtputf8_advertise_hosts = NULL;
3742 /* Read the main runtime configuration data; this gives up if there
3743 is a failure. It leaves the configuration file open so that the subsequent
3744 configuration data for delivery can be read if needed.
3746 NOTE: immediately after opening the configuration file we change the working
3747 directory to "/"! Later we change to $spool_directory. We do it there, because
3748 during readconf_main() some expansion takes place already. */
3750 /* Store the initial cwd before we change directories. Can be NULL if the
3751 dir has already been unlinked. */
3752 initial_cwd = os_getcwd(NULL, 0);
3755 -be[m] expansion test -
3756 -b[fF] filter test new
3758 -bmalware malware_test_file new
3760 -brw rewrite test new
3762 -bv[s] address verify -
3764 -bP <option> (except -bP config, which sets list_config)
3766 If any of these options is set, we suppress warnings about configuration
3767 issues (currently about tls_advertise_hosts and keep_environment not being
3771 #ifdef MEASURE_TIMING
3772 struct timeval t0, diff;
3773 (void)gettimeofday(&t0, NULL);
3776 readconf_main(checking || list_options);
3778 #ifdef MEASURE_TIMING
3779 report_time_since(&t0, US"readconf_main (delta)");
3784 /* Now in directory "/" */
3786 if (cleanup_environment() == FALSE)
3787 log_write(0, LOG_PANIC_DIE, "Can't cleanup environment");
3790 /* If an action on specific messages is requested, or if a daemon or queue
3791 runner is being started, we need to know if Exim was called by an admin user.
3792 This is the case if the real user is root or exim, or if the real group is
3793 exim, or if one of the supplementary groups is exim or a group listed in
3794 admin_groups. We don't fail all message actions immediately if not admin_user,
3795 since some actions can be performed by non-admin users. Instead, set admin_user
3796 for later interrogation. */
3798 if (real_uid == root_uid || real_uid == exim_uid || real_gid == exim_gid)
3799 f.admin_user = TRUE;
3801 for (int i = 0; i < group_count && !f.admin_user; i++)
3802 if (group_list[i] == exim_gid)
3803 f.admin_user = TRUE;
3804 else if (admin_groups)
3805 for (int j = 1; j <= (int)admin_groups[0] && !f.admin_user; j++)
3806 if (admin_groups[j] == group_list[i])
3807 f.admin_user = TRUE;
3809 /* Another group of privileged users are the trusted users. These are root,
3810 exim, and any caller matching trusted_users or trusted_groups. Trusted callers
3811 are permitted to specify sender_addresses with -f on the command line, and
3812 other message parameters as well. */
3814 if (real_uid == root_uid || real_uid == exim_uid)
3815 f.trusted_caller = TRUE;
3819 for (int i = 1; i <= (int)trusted_users[0] && !f.trusted_caller; i++)
3820 if (trusted_users[i] == real_uid)
3821 f.trusted_caller = TRUE;
3824 for (int i = 1; i <= (int)trusted_groups[0] && !f.trusted_caller; i++)
3825 if (trusted_groups[i] == real_gid)
3826 f.trusted_caller = TRUE;
3827 else for (int j = 0; j < group_count && !f.trusted_caller; j++)
3828 if (trusted_groups[i] == group_list[j])
3829 f.trusted_caller = TRUE;
3832 /* At this point, we know if the user is privileged and some command-line
3833 options become possibly impermissible, depending upon the configuration file. */
3835 if (checking && commandline_checks_require_admin && !f.admin_user)
3836 exim_fail("exim: those command-line flags are set to require admin\n");
3838 /* Handle the decoding of logging options. */
3840 decode_bits(log_selector, log_selector_size, log_notall,
3841 log_selector_string, log_options, log_options_count, US"log", 0);
3845 debug_printf("configuration file is %s\n", config_main_filename);
3846 debug_printf("log selectors =");
3847 for (int i = 0; i < log_selector_size; i++)
3848 debug_printf(" %08x", log_selector[i]);
3852 /* If domain literals are not allowed, check the sender address that was
3853 supplied with -f. Ditto for a stripped trailing dot. */
3857 if (sender_address[sender_address_domain] == '[' && !allow_domain_literals)
3858 exim_fail("exim: bad -f address \"%s\": domain literals not "
3859 "allowed\n", sender_address);
3860 if (f_end_dot && !strip_trailing_dot)
3861 exim_fail("exim: bad -f address \"%s.\": domain is malformed "
3862 "(trailing dot not allowed)\n", sender_address);
3865 /* See if an admin user overrode our logging. */
3867 if (cmdline_syslog_name)
3870 syslog_processname = cmdline_syslog_name;
3871 log_file_path = string_copy(CUS"syslog");
3874 /* not a panic, non-privileged users should not be able to spam paniclog */
3876 "exim: you lack sufficient privilege to specify syslog process name\n");
3878 /* Paranoia check of maximum lengths of certain strings. There is a check
3879 on the length of the log file path in log.c, which will come into effect
3880 if there are any calls to write the log earlier than this. However, if we
3881 get this far but the string is very long, it is better to stop now than to
3882 carry on and (e.g.) receive a message and then have to collapse. The call to
3883 log_write() from here will cause the ultimate panic collapse if the complete
3884 file name exceeds the buffer length. */
3886 if (Ustrlen(log_file_path) > 200)
3887 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3888 "log_file_path is longer than 200 chars: aborting");
3890 if (Ustrlen(pid_file_path) > 200)
3891 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3892 "pid_file_path is longer than 200 chars: aborting");
3894 if (Ustrlen(spool_directory) > 200)
3895 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3896 "spool_directory is longer than 200 chars: aborting");
3898 /* Length check on the process name given to syslog for its TAG field,
3899 which is only permitted to be 32 characters or less. See RFC 3164. */
3901 if (Ustrlen(syslog_processname) > 32)
3902 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3903 "syslog_processname is longer than 32 chars: aborting");
3908 log_write(0, LOG_MAIN, "%s", log_oneline);
3909 return EXIT_SUCCESS;
3912 return EXIT_FAILURE;
3914 /* In some operating systems, the environment variable TMPDIR controls where
3915 temporary files are created; Exim doesn't use these (apart from when delivering
3916 to MBX mailboxes), but called libraries such as DBM libraries may require them.
3917 If TMPDIR is found in the environment, reset it to the value defined in the
3918 EXIM_TMPDIR macro, if this macro is defined. For backward compatibility this
3919 macro may be called TMPDIR in old "Local/Makefile"s. It's converted to
3920 EXIM_TMPDIR by the build scripts.
3924 if (environ) for (uschar ** p = USS environ; *p; p++)
3925 if (Ustrncmp(*p, "TMPDIR=", 7) == 0 && Ustrcmp(*p+7, EXIM_TMPDIR) != 0)
3927 uschar * newp = store_malloc(Ustrlen(EXIM_TMPDIR) + 8);
3928 sprintf(CS newp, "TMPDIR=%s", EXIM_TMPDIR);
3930 DEBUG(D_any) debug_printf("reset TMPDIR=%s in environment\n", EXIM_TMPDIR);
3934 /* Timezone handling. If timezone_string is "utc", set a flag to cause all
3935 timestamps to be in UTC (gmtime() is used instead of localtime()). Otherwise,
3936 we may need to get rid of a bogus timezone setting. This can arise when Exim is
3937 called by a user who has set the TZ variable. This then affects the timestamps
3938 in log files and in Received: headers, and any created Date: header lines. The
3939 required timezone is settable in the configuration file, so nothing can be done
3940 about this earlier - but hopefully nothing will normally be logged earlier than
3941 this. We have to make a new environment if TZ is wrong, but don't bother if
3942 timestamps_utc is set, because then all times are in UTC anyway. */
3944 if (timezone_string && strcmpic(timezone_string, US"UTC") == 0)
3945 f.timestamps_utc = TRUE;
3948 uschar *envtz = US getenv("TZ");
3950 ? !timezone_string || Ustrcmp(timezone_string, envtz) != 0
3951 : timezone_string != NULL
3954 uschar **p = USS environ;
3958 if (environ) while (*p++) count++;
3959 if (!envtz) count++;
3960 newp = new = store_malloc(sizeof(uschar *) * (count + 1));
3961 if (environ) for (p = USS environ; *p; p++)
3962 if (Ustrncmp(*p, "TZ=", 3) != 0) *newp++ = *p;
3963 if (timezone_string)
3965 *newp = store_malloc(Ustrlen(timezone_string) + 4);
3966 sprintf(CS *newp++, "TZ=%s", timezone_string);
3971 DEBUG(D_any) debug_printf("Reset TZ to %s: time is %s\n", timezone_string,
3972 tod_stamp(tod_log));
3976 /* Handle the case when we have removed the setuid privilege because of -C or
3977 -D. This means that the caller of Exim was not root.
3979 There is a problem if we were running as the Exim user. The sysadmin may
3980 expect this case to retain privilege because "the binary was called by the
3981 Exim user", but it hasn't, because either the -D option set macros, or the
3982 -C option set a non-trusted configuration file. There are two possibilities:
3984 (1) If deliver_drop_privilege is set, Exim is not going to re-exec in order
3985 to do message deliveries. Thus, the fact that it is running as a
3986 non-privileged user is plausible, and might be wanted in some special
3987 configurations. However, really_exim will have been set false when
3988 privilege was dropped, to stop Exim trying to write to its normal log
3989 files. Therefore, re-enable normal log processing, assuming the sysadmin
3990 has set up the log directory correctly.
3992 (2) If deliver_drop_privilege is not set, the configuration won't work as
3993 apparently intended, and so we log a panic message. In order to retain
3994 root for -C or -D, the caller must either be root or be invoking a
3995 trusted configuration file (when deliver_drop_privilege is false). */
3997 if ( removed_privilege
3998 && (!f.trusted_config || opt_D_used)
3999 && real_uid == exim_uid)
4000 if (deliver_drop_privilege)
4001 f.really_exim = TRUE; /* let logging work normally */
4003 log_write(0, LOG_MAIN|LOG_PANIC,
4004 "exim user lost privilege for using %s option",
4005 f.trusted_config? "-D" : "-C");
4007 /* Start up Perl interpreter if Perl support is configured and there is a
4008 perl_startup option, and the configuration or the command line specifies
4009 initializing starting. Note that the global variables are actually called
4010 opt_perl_xxx to avoid clashing with perl's namespace (perl_*). */
4013 if (perl_start_option != 0)
4014 opt_perl_at_start = (perl_start_option > 0);
4015 if (opt_perl_at_start && opt_perl_startup != NULL)
4018 DEBUG(D_any) debug_printf("Starting Perl interpreter\n");
4019 if ((errstr = init_perl(opt_perl_startup)))
4020 exim_fail("exim: error in perl_startup code: %s\n", errstr);
4021 opt_perl_started = TRUE;
4023 #endif /* EXIM_PERL */
4025 /* Log the arguments of the call if the configuration file said so. This is
4026 a debugging feature for finding out what arguments certain MUAs actually use.
4027 Don't attempt it if logging is disabled, or if listing variables or if
4028 verifying/testing addresses or expansions. */
4030 if ( (debug_selector & D_any || LOGGING(arguments))
4031 && f.really_exim && !list_options && !checking)
4033 uschar *p = big_buffer;
4034 Ustrcpy(p, US"cwd= (failed)");
4040 Ustrncpy(p + 4, initial_cwd, big_buffer_size-5);
4041 p += 4 + Ustrlen(initial_cwd);
4042 /* in case p is near the end and we don't provide enough space for
4043 * string_format to be willing to write. */
4047 (void)string_format(p, big_buffer_size - (p - big_buffer), " %d args:", argc);
4049 for (int i = 0; i < argc; i++)
4051 int len = Ustrlen(argv[i]);
4052 const uschar *printing;
4054 if (p + len + 8 >= big_buffer + big_buffer_size)
4056 Ustrcpy(p, US" ...");
4057 log_write(0, LOG_MAIN, "%s", big_buffer);
4058 Ustrcpy(big_buffer, US"...");
4061 printing = string_printing(argv[i]);
4062 if (printing[0] == 0) quote = US"\""; else
4064 const uschar *pp = printing;
4066 while (*pp != 0) if (isspace(*pp++)) { quote = US"\""; break; }
4068 p += sprintf(CS p, " %s%.*s%s", quote, (int)(big_buffer_size -
4069 (p - big_buffer) - 4), printing, quote);
4072 if (LOGGING(arguments))
4073 log_write(0, LOG_MAIN, "%s", big_buffer);
4075 debug_printf("%s\n", big_buffer);
4078 /* Set the working directory to be the top-level spool directory. We don't rely
4079 on this in the code, which always uses fully qualified names, but it's useful
4080 for core dumps etc. Don't complain if it fails - the spool directory might not
4081 be generally accessible and calls with the -C option (and others) have lost
4082 privilege by now. Before the chdir, we try to ensure that the directory exists.
4085 if (Uchdir(spool_directory) != 0)
4088 (void)directory_make(spool_directory, US"", SPOOL_DIRECTORY_MODE, FALSE);
4089 dummy = /* quieten compiler */ Uchdir(spool_directory);
4090 dummy = dummy; /* yet more compiler quietening, sigh */
4093 /* Handle calls with the -bi option. This is a sendmail option to rebuild *the*
4094 alias file. Exim doesn't have such a concept, but this call is screwed into
4095 Sun's YP makefiles. Handle this by calling a configured script, as the real
4096 user who called Exim. The -oA option can be used to pass an argument to the
4101 (void)fclose(config_file);
4102 if (bi_command != NULL)
4106 argv[i++] = bi_command;
4107 if (alias_arg != NULL) argv[i++] = alias_arg;
4110 setgroups(group_count, group_list);
4111 exim_setugid(real_uid, real_gid, FALSE, US"running bi_command");
4113 DEBUG(D_exec) debug_printf("exec %.256s %.256s\n", argv[0],
4114 (argv[1] == NULL)? US"" : argv[1]);
4116 execv(CS argv[0], (char *const *)argv);
4117 exim_fail("exim: exec failed: %s\n", strerror(errno));
4121 DEBUG(D_any) debug_printf("-bi used but bi_command not set; exiting\n");
4126 /* We moved the admin/trusted check to be immediately after reading the
4127 configuration file. We leave these prints here to ensure that syslog setup,
4128 logfile setup, and so on has already happened. */
4130 if (f.trusted_caller) DEBUG(D_any) debug_printf("trusted user\n");
4131 if (f.admin_user) DEBUG(D_any) debug_printf("admin user\n");
4133 /* Only an admin user may start the daemon or force a queue run in the default
4134 configuration, but the queue run restriction can be relaxed. Only an admin
4135 user may request that a message be returned to its sender forthwith. Only an
4136 admin user may specify a debug level greater than D_v (because it might show
4137 passwords, etc. in lookup queries). Only an admin user may request a queue
4138 count. Only an admin user can use the test interface to scan for email
4139 (because Exim will be in the spool dir and able to look at mails). */
4143 BOOL debugset = (debug_selector & ~D_v) != 0;
4144 if ( deliver_give_up || f.daemon_listen || malware_test_file
4145 || count_queue && queue_list_requires_admin
4146 || list_queue && queue_list_requires_admin
4147 || queue_interval >= 0 && prod_requires_admin
4148 || queue_name_dest && prod_requires_admin
4149 || debugset && !f.running_in_test_harness
4151 exim_fail("exim:%s permission denied\n", debugset? " debugging" : "");
4154 /* If the real user is not root or the exim uid, the argument for passing
4155 in an open TCP/IP connection for another message is not permitted, nor is
4156 running with the -N option for any delivery action, unless this call to exim is
4157 one that supplied an input message, or we are using a patched exim for
4158 regression testing. */
4160 if (real_uid != root_uid && real_uid != exim_uid &&
4161 (continue_hostname != NULL ||
4163 (queue_interval >= 0 || f.daemon_listen || msg_action_arg > 0)
4164 )) && !f.running_in_test_harness)
4165 exim_fail("exim: Permission denied\n");
4167 /* If the caller is not trusted, certain arguments are ignored when running for
4168 real, but are permitted when checking things (-be, -bv, -bt, -bh, -bf, -bF).
4169 Note that authority for performing certain actions on messages is tested in the
4170 queue_action() function. */
4172 if (!f.trusted_caller && !checking)
4174 sender_host_name = sender_host_address = interface_address =
4175 sender_ident = received_protocol = NULL;
4176 sender_host_port = interface_port = 0;
4177 sender_host_authenticated = authenticated_sender = authenticated_id = NULL;
4180 /* If a sender host address is set, extract the optional port number off the
4181 end of it and check its syntax. Do the same thing for the interface address.
4182 Exim exits if the syntax is bad. */
4186 if (sender_host_address != NULL)
4187 sender_host_port = check_port(sender_host_address);
4188 if (interface_address != NULL)
4189 interface_port = check_port(interface_address);
4192 /* If the caller is trusted, then they can use -G to suppress_local_fixups. */
4195 if (f.trusted_caller)
4197 f.suppress_local_fixups = f.suppress_local_fixups_default = TRUE;
4198 DEBUG(D_acl) debug_printf("suppress_local_fixups forced on by -G\n");
4201 exim_fail("exim: permission denied (-G requires a trusted user)\n");
4204 /* If an SMTP message is being received check to see if the standard input is a
4205 TCP/IP socket. If it is, we assume that Exim was called from inetd if the
4206 caller is root or the Exim user, or if the port is a privileged one. Otherwise,
4211 union sockaddr_46 inetd_sock;
4212 EXIM_SOCKLEN_T size = sizeof(inetd_sock);
4213 if (getpeername(0, (struct sockaddr *)(&inetd_sock), &size) == 0)
4215 int family = ((struct sockaddr *)(&inetd_sock))->sa_family;
4216 if (family == AF_INET || family == AF_INET6)
4218 union sockaddr_46 interface_sock;
4219 size = sizeof(interface_sock);
4221 if (getsockname(0, (struct sockaddr *)(&interface_sock), &size) == 0)
4222 interface_address = host_ntoa(-1, &interface_sock, NULL,
4225 if (host_is_tls_on_connect_port(interface_port)) tls_in.on_connect = TRUE;
4227 if (real_uid == root_uid || real_uid == exim_uid || interface_port < 1024)
4230 sender_host_address = host_ntoa(-1, (struct sockaddr *)(&inetd_sock),
4231 NULL, &sender_host_port);
4232 if (mua_wrapper) log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Input from "
4233 "inetd is not supported when mua_wrapper is set");
4237 "exim: Permission denied (unprivileged user, unprivileged port)\n");
4242 /* If the load average is going to be needed while receiving a message, get it
4243 now for those OS that require the first call to os_getloadavg() to be done as
4244 root. There will be further calls later for each message received. */
4246 #ifdef LOAD_AVG_NEEDS_ROOT
4247 if ( receiving_message
4248 && (queue_only_load >= 0 || (f.is_inetd && smtp_load_reserve >= 0)))
4249 load_average = OS_GETLOADAVG();
4252 /* The queue_only configuration option can be overridden by -odx on the command
4253 line, except that if queue_only_override is false, queue_only cannot be unset
4254 from the command line. */
4256 if (queue_only_set && (queue_only_override || arg_queue_only))
4257 queue_only = arg_queue_only;
4259 /* The receive_timeout and smtp_receive_timeout options can be overridden by
4262 if (arg_receive_timeout >= 0) receive_timeout = arg_receive_timeout;
4263 if (arg_smtp_receive_timeout >= 0)
4264 smtp_receive_timeout = arg_smtp_receive_timeout;
4266 /* If Exim was started with root privilege, unless we have already removed the
4267 root privilege above as a result of -C, -D, -be, -bf or -bF, remove it now
4268 except when starting the daemon or doing some kind of delivery or address
4269 testing (-bt). These are the only cases when root need to be retained. We run
4270 as exim for -bv and -bh. However, if deliver_drop_privilege is set, root is
4271 retained only for starting the daemon. We always do the initgroups() in this
4272 situation (controlled by the TRUE below), in order to be as close as possible
4273 to the state Exim usually runs in. */
4275 if (!unprivileged && /* originally had root AND */
4276 !removed_privilege && /* still got root AND */
4277 !f.daemon_listen && /* not starting the daemon */
4278 queue_interval <= 0 && /* (either kind of daemon) */
4280 deliver_drop_privilege || /* requested unprivileged */
4282 queue_interval < 0 && /* not running the queue */
4283 (msg_action_arg < 0 || /* and */
4284 msg_action != MSG_DELIVER) && /* not delivering and */
4285 (!checking || !f.address_test_mode) /* not address checking */
4287 exim_setugid(exim_uid, exim_gid, TRUE, US"privilege not needed");
4289 /* When we are retaining a privileged uid, we still change to the exim gid. */
4294 DEBUG(D_any) debug_printf("dropping to exim gid; retaining priv uid\n");
4295 rv = setgid(exim_gid);
4296 /* Impact of failure is that some stuff might end up with an incorrect group.
4297 We track this for failures from root, since any attempt to change privilege
4298 by root should succeed and failures should be examined. For non-root,
4299 there's no security risk. For me, it's { exim -bV } on a just-built binary,
4300 no need to complain then. */
4302 if (!(unprivileged || removed_privilege))
4303 exim_fail("exim: changing group failed: %s\n", strerror(errno));
4305 DEBUG(D_any) debug_printf("changing group to %ld failed: %s\n",
4306 (long int)exim_gid, strerror(errno));
4309 /* Handle a request to scan a file for malware */
4310 if (malware_test_file)
4312 #ifdef WITH_CONTENT_SCAN
4314 set_process_info("scanning file for malware");
4315 result = malware_in_file(malware_test_file);
4318 printf("No malware found.\n");
4323 printf("Malware lookup returned non-okay/fail: %d\n", result);
4327 printf("Malware found: %s\n", malware_name);
4329 printf("Malware scan detected malware of unknown name.\n");
4331 printf("Malware scanning not enabled at compile time.\n");
4336 /* Handle a request to list the delivery queue */
4340 set_process_info("listing the queue");
4341 queue_list(list_queue_option, argv + recipients_arg, argc - recipients_arg);
4345 /* Handle a request to count the delivery queue */
4349 set_process_info("counting the queue");
4354 /* Handle actions on specific messages, except for the force delivery and
4355 message load actions, which are done below. Some actions take a whole list of
4356 message ids, which are known to continue up to the end of the arguments. Others
4357 take a single message id and then operate on the recipients list. */
4359 if (msg_action_arg > 0 && msg_action != MSG_DELIVER && msg_action != MSG_LOAD)
4361 int yield = EXIT_SUCCESS;
4362 set_process_info("acting on specified messages");
4364 /* ACL definitions may be needed when removing a message (-Mrm) because
4365 event_action gets expanded */
4367 if (msg_action == MSG_REMOVE)
4370 if (!one_msg_action)
4372 for (i = msg_action_arg; i < argc; i++)
4373 if (!queue_action(argv[i], msg_action, NULL, 0, 0))
4374 yield = EXIT_FAILURE;
4377 case MSG_REMOVE: case MSG_FREEZE: case MSG_THAW: break;
4378 default: printf("\n"); break;
4382 else if (!queue_action(argv[msg_action_arg], msg_action, argv, argc,
4383 recipients_arg)) yield = EXIT_FAILURE;
4387 /* We used to set up here to skip reading the ACL section, on
4388 (msg_action_arg > 0 || (queue_interval == 0 && !f.daemon_listen)
4389 Now, since the intro of the ${acl } expansion, ACL definitions may be
4390 needed in transports so we lost the optimisation. */
4393 #ifdef MEASURE_TIMING
4394 struct timeval t0, diff;
4395 (void)gettimeofday(&t0, NULL);
4400 #ifdef MEASURE_TIMING
4401 report_time_since(&t0, US"readconf_rest (delta)");
4405 /* Handle the -brt option. This is for checking out retry configurations.
4406 The next three arguments are a domain name or a complete address, and
4407 optionally two error numbers. All it does is to call the function that
4408 scans the retry configuration data. */
4410 if (test_retry_arg >= 0)
4412 retry_config *yield;
4413 int basic_errno = 0;
4417 if (test_retry_arg >= argc)
4419 printf("-brt needs a domain or address argument\n");
4420 exim_exit(EXIT_FAILURE, US"main");
4422 s1 = argv[test_retry_arg++];
4425 /* If the first argument contains no @ and no . it might be a local user
4426 or it might be a single-component name. Treat as a domain. */
4428 if (Ustrchr(s1, '@') == NULL && Ustrchr(s1, '.') == NULL)
4430 printf("Warning: \"%s\" contains no '@' and no '.' characters. It is "
4431 "being \ntreated as a one-component domain, not as a local part.\n\n",
4435 /* There may be an optional second domain arg. */
4437 if (test_retry_arg < argc && Ustrchr(argv[test_retry_arg], '.') != NULL)
4438 s2 = argv[test_retry_arg++];
4440 /* The final arg is an error name */
4442 if (test_retry_arg < argc)
4444 uschar *ss = argv[test_retry_arg];
4446 readconf_retry_error(ss, ss + Ustrlen(ss), &basic_errno, &more_errno);
4449 printf("%s\n", CS error);
4450 return EXIT_FAILURE;
4453 /* For the {MAIL,RCPT,DATA}_4xx errors, a value of 255 means "any", and a
4454 code > 100 as an error is for matching codes to the decade. Turn them into
4455 a real error code, off the decade. */
4457 if (basic_errno == ERRNO_MAIL4XX ||
4458 basic_errno == ERRNO_RCPT4XX ||
4459 basic_errno == ERRNO_DATA4XX)
4461 int code = (more_errno >> 8) & 255;
4463 more_errno = (more_errno & 0xffff00ff) | (21 << 8);
4464 else if (code > 100)
4465 more_errno = (more_errno & 0xffff00ff) | ((code - 96) << 8);
4469 if (!(yield = retry_find_config(s1, s2, basic_errno, more_errno)))
4470 printf("No retry information found\n");
4473 more_errno = yield->more_errno;
4474 printf("Retry rule: %s ", yield->pattern);
4476 if (yield->basic_errno == ERRNO_EXIMQUOTA)
4478 printf("quota%s%s ",
4479 (more_errno > 0)? "_" : "",
4480 (more_errno > 0)? readconf_printtime(more_errno) : US"");
4482 else if (yield->basic_errno == ECONNREFUSED)
4484 printf("refused%s%s ",
4485 (more_errno > 0)? "_" : "",
4486 (more_errno == 'M')? "MX" :
4487 (more_errno == 'A')? "A" : "");
4489 else if (yield->basic_errno == ETIMEDOUT)
4492 if ((more_errno & RTEF_CTOUT) != 0) printf("_connect");
4494 if (more_errno != 0) printf("_%s",
4495 (more_errno == 'M')? "MX" : "A");
4498 else if (yield->basic_errno == ERRNO_AUTHFAIL)
4499 printf("auth_failed ");
4502 for (retry_rule * r = yield->rules; r; r = r->next)
4504 printf("%c,%s", r->rule, readconf_printtime(r->timeout)); /* Do not */
4505 printf(",%s", readconf_printtime(r->p1)); /* amalgamate */
4511 printf(",%d.", x/1000);
4525 exim_exit(EXIT_SUCCESS, US"main");
4528 /* Handle a request to list one or more configuration options */
4529 /* If -n was set, we suppress some information */
4534 set_process_info("listing variables");
4535 if (recipients_arg >= argc)
4536 fail = !readconf_print(US"all", NULL, flag_n);
4537 else for (i = recipients_arg; i < argc; i++)
4540 (Ustrcmp(argv[i], "router") == 0 ||
4541 Ustrcmp(argv[i], "transport") == 0 ||
4542 Ustrcmp(argv[i], "authenticator") == 0 ||
4543 Ustrcmp(argv[i], "macro") == 0 ||
4544 Ustrcmp(argv[i], "environment") == 0))
4546 fail |= !readconf_print(argv[i+1], argv[i], flag_n);
4550 fail = !readconf_print(argv[i], NULL, flag_n);
4552 exim_exit(fail ? EXIT_FAILURE : EXIT_SUCCESS, US"main");
4557 set_process_info("listing config");
4558 exim_exit(readconf_print(US"config", NULL, flag_n)
4559 ? EXIT_SUCCESS : EXIT_FAILURE, US"main");
4563 /* Initialise subsystems as required. */
4567 /* Handle a request to deliver one or more messages that are already on the
4568 queue. Values of msg_action other than MSG_DELIVER and MSG_LOAD are dealt with
4569 above. MSG_LOAD is handled with -be (which is the only time it applies) below.
4571 Delivery of specific messages is typically used for a small number when
4572 prodding by hand (when the option forced_delivery will be set) or when
4573 re-execing to regain root privilege. Each message delivery must happen in a
4574 separate process, so we fork a process for each one, and run them sequentially
4575 so that debugging output doesn't get intertwined, and to avoid spawning too
4576 many processes if a long list is given. However, don't fork for the last one;
4577 this saves a process in the common case when Exim is called to deliver just one
4580 if (msg_action_arg > 0 && msg_action != MSG_LOAD)
4582 if (prod_requires_admin && !f.admin_user)
4584 fprintf(stderr, "exim: Permission denied\n");
4585 exim_exit(EXIT_FAILURE, US"main");
4587 set_process_info("delivering specified messages");
4588 if (deliver_give_up) forced_delivery = f.deliver_force_thaw = TRUE;
4589 for (i = msg_action_arg; i < argc; i++)
4594 (void)deliver_message(argv[i], forced_delivery, deliver_give_up);
4595 else if ((pid = fork()) == 0)
4597 (void)deliver_message(argv[i], forced_delivery, deliver_give_up);
4598 exim_underbar_exit(EXIT_SUCCESS);
4602 fprintf(stderr, "failed to fork delivery process for %s: %s\n", argv[i],
4604 exim_exit(EXIT_FAILURE, US"main");
4608 exim_exit(EXIT_SUCCESS, US"main");
4612 /* If only a single queue run is requested, without SMTP listening, we can just
4613 turn into a queue runner, with an optional starting message id. */
4615 if (queue_interval == 0 && !f.daemon_listen)
4617 DEBUG(D_queue_run) debug_printf("Single queue run%s%s%s%s\n",
4618 (start_queue_run_id == NULL)? US"" : US" starting at ",
4619 (start_queue_run_id == NULL)? US"" : start_queue_run_id,
4620 (stop_queue_run_id == NULL)? US"" : US" stopping at ",
4621 (stop_queue_run_id == NULL)? US"" : stop_queue_run_id);
4623 set_process_info("running the '%s' queue (single queue run)", queue_name);
4625 set_process_info("running the queue (single queue run)");
4626 queue_run(start_queue_run_id, stop_queue_run_id, FALSE);
4627 exim_exit(EXIT_SUCCESS, US"main");
4631 /* Find the login name of the real user running this process. This is always
4632 needed when receiving a message, because it is written into the spool file. It
4633 may also be used to construct a from: or a sender: header, and in this case we
4634 need the user's full name as well, so save a copy of it, checked for RFC822
4635 syntax and munged if necessary, if it hasn't previously been set by the -F
4636 argument. We may try to get the passwd entry more than once, in case NIS or
4637 other delays are in evidence. Save the home directory for use in filter testing
4642 if ((pw = getpwuid(real_uid)) != NULL)
4644 originator_login = string_copy(US pw->pw_name);
4645 originator_home = string_copy(US pw->pw_dir);
4647 /* If user name has not been set by -F, set it from the passwd entry
4648 unless -f has been used to set the sender address by a trusted user. */
4650 if (!originator_name)
4652 if (!sender_address || (!f.trusted_caller && filter_test == FTEST_NONE))
4654 uschar *name = US pw->pw_gecos;
4655 uschar *amp = Ustrchr(name, '&');
4658 /* Most Unix specify that a '&' character in the gecos field is
4659 replaced by a copy of the login name, and some even specify that
4660 the first character should be upper cased, so that's what we do. */
4665 string_format(buffer, sizeof(buffer), "%.*s%n%s%s",
4666 (int)(amp - name), name, &loffset, originator_login, amp + 1);
4667 buffer[loffset] = toupper(buffer[loffset]);
4671 /* If a pattern for matching the gecos field was supplied, apply
4672 it and then expand the name string. */
4674 if (gecos_pattern && gecos_name)
4677 re = regex_must_compile(gecos_pattern, FALSE, TRUE); /* Use malloc */
4679 if (regex_match_and_setup(re, name, 0, -1))
4681 uschar *new_name = expand_string(gecos_name);
4685 DEBUG(D_receive) debug_printf("user name \"%s\" extracted from "
4686 "gecos field \"%s\"\n", new_name, name);
4689 else DEBUG(D_receive) debug_printf("failed to expand gecos_name string "
4690 "\"%s\": %s\n", gecos_name, expand_string_message);
4692 else DEBUG(D_receive) debug_printf("gecos_pattern \"%s\" did not match "
4693 "gecos field \"%s\"\n", gecos_pattern, name);
4694 store_free((void *)re);
4696 originator_name = string_copy(name);
4699 /* A trusted caller has used -f but not -F */
4701 else originator_name = US"";
4704 /* Break the retry loop */
4709 if (++i > finduser_retries) break;
4713 /* If we cannot get a user login, log the incident and give up, unless the
4714 configuration specifies something to use. When running in the test harness,
4715 any setting of unknown_login overrides the actual name. */
4717 if (originator_login == NULL || f.running_in_test_harness)
4719 if (unknown_login != NULL)
4721 originator_login = expand_string(unknown_login);
4722 if (originator_name == NULL && unknown_username != NULL)
4723 originator_name = expand_string(unknown_username);
4724 if (originator_name == NULL) originator_name = US"";
4726 if (originator_login == NULL)
4727 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Failed to get user name for uid %d",
4731 /* Ensure that the user name is in a suitable form for use as a "phrase" in an
4734 originator_name = string_copy(parse_fix_phrase(originator_name,
4735 Ustrlen(originator_name), big_buffer, big_buffer_size));
4737 /* If a message is created by this call of Exim, the uid/gid of its originator
4738 are those of the caller. These values are overridden if an existing message is
4739 read in from the spool. */
4741 originator_uid = real_uid;
4742 originator_gid = real_gid;
4744 DEBUG(D_receive) debug_printf("originator: uid=%d gid=%d login=%s name=%s\n",
4745 (int)originator_uid, (int)originator_gid, originator_login, originator_name);
4747 /* Run in daemon and/or queue-running mode. The function daemon_go() never
4748 returns. We leave this till here so that the originator_ fields are available
4749 for incoming messages via the daemon. The daemon cannot be run in mua_wrapper
4752 if (f.daemon_listen || f.inetd_wait_mode || queue_interval > 0)
4756 fprintf(stderr, "Daemon cannot be run when mua_wrapper is set\n");
4757 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Daemon cannot be run when "
4758 "mua_wrapper is set");
4761 # ifndef DISABLE_TLS
4762 /* This also checks that the library linkage is working and we can call
4763 routines in it, so call even if tls_require_ciphers is unset */
4765 # ifdef MEASURE_TIMING
4766 struct timeval t0, diff;
4767 (void)gettimeofday(&t0, NULL);
4769 if (!tls_dropprivs_validate_require_cipher(FALSE))
4771 # ifdef MEASURE_TIMING
4772 report_time_since(&t0, US"validate_ciphers (delta)");
4780 /* If the sender ident has not been set (by a trusted caller) set it to
4781 the caller. This will get overwritten below for an inetd call. If a trusted
4782 caller has set it empty, unset it. */
4784 if (!sender_ident) sender_ident = originator_login;
4785 else if (!*sender_ident) sender_ident = NULL;
4787 /* Handle the -brw option, which is for checking out rewriting rules. Cause log
4788 writes (on errors) to go to stderr instead. Can't do this earlier, as want the
4789 originator_* variables set. */
4791 if (test_rewrite_arg >= 0)
4793 f.really_exim = FALSE;
4794 if (test_rewrite_arg >= argc)
4796 printf("-brw needs an address argument\n");
4797 exim_exit(EXIT_FAILURE, US"main");
4799 rewrite_test(argv[test_rewrite_arg]);
4800 exim_exit(EXIT_SUCCESS, US"main");
4803 /* A locally-supplied message is considered to be coming from a local user
4804 unless a trusted caller supplies a sender address with -f, or is passing in the
4805 message via SMTP (inetd invocation or otherwise). */
4807 if ( !sender_address && !smtp_input
4808 || !f.trusted_caller && filter_test == FTEST_NONE)
4810 f.sender_local = TRUE;
4812 /* A trusted caller can supply authenticated_sender and authenticated_id
4813 via -oMas and -oMai and if so, they will already be set. Otherwise, force
4814 defaults except when host checking. */
4816 if (!authenticated_sender && !host_checking)
4817 authenticated_sender = string_sprintf("%s@%s", originator_login,
4818 qualify_domain_sender);
4819 if (!authenticated_id && !host_checking)
4820 authenticated_id = originator_login;
4823 /* Trusted callers are always permitted to specify the sender address.
4824 Untrusted callers may specify it if it matches untrusted_set_sender, or if what
4825 is specified is the empty address. However, if a trusted caller does not
4826 specify a sender address for SMTP input, we leave sender_address unset. This
4827 causes the MAIL commands to be honoured. */
4829 if ( !smtp_input && !sender_address
4830 || !receive_check_set_sender(sender_address))
4832 /* Either the caller is not permitted to set a general sender, or this is
4833 non-SMTP input and the trusted caller has not set a sender. If there is no
4834 sender, or if a sender other than <> is set, override with the originator's
4835 login (which will get qualified below), except when checking things. */
4837 if (sender_address == NULL /* No sender_address set */
4839 (sender_address[0] != 0 && /* Non-empty sender address, AND */
4840 !checking)) /* Not running tests, including filter tests */
4842 sender_address = originator_login;
4843 f.sender_address_forced = FALSE;
4844 sender_address_domain = 0;
4848 /* Remember whether an untrusted caller set the sender address */
4850 f.sender_set_untrusted = sender_address != originator_login && !f.trusted_caller;
4852 /* Ensure that the sender address is fully qualified unless it is the empty
4853 address, which indicates an error message, or doesn't exist (root caller, smtp
4854 interface, no -f argument). */
4856 if (sender_address && *sender_address && sender_address_domain == 0)
4857 sender_address = string_sprintf("%s@%s", local_part_quote(sender_address),
4858 qualify_domain_sender);
4860 DEBUG(D_receive) debug_printf("sender address = %s\n", sender_address);
4862 /* Handle a request to verify a list of addresses, or test them for delivery.
4863 This must follow the setting of the sender address, since routers can be
4864 predicated upon the sender. If no arguments are given, read addresses from
4865 stdin. Set debug_level to at least D_v to get full output for address testing.
4868 if (verify_address_mode || f.address_test_mode)
4871 int flags = vopt_qualify;
4873 if (verify_address_mode)
4875 if (!verify_as_sender) flags |= vopt_is_recipient;
4876 DEBUG(D_verify) debug_print_ids(US"Verifying:");
4881 flags |= vopt_is_recipient;
4882 debug_selector |= D_v;
4883 debug_file = stderr;
4884 debug_fd = fileno(debug_file);
4885 DEBUG(D_verify) debug_print_ids(US"Address testing:");
4888 if (recipients_arg < argc)
4890 while (recipients_arg < argc)
4892 /* Supplied addresses are tainted since they come from a user */
4893 uschar * s = string_copy_taint(argv[recipients_arg++], TRUE);
4896 BOOL finished = FALSE;
4897 uschar *ss = parse_find_address_end(s, FALSE);
4898 if (*ss == ',') *ss = 0; else finished = TRUE;
4899 test_address(s, flags, &exit_value);
4902 while (*++s == ',' || isspace(*s)) ;
4909 uschar * s = get_stdinput(NULL, NULL);
4911 test_address(string_copy_taint(s, TRUE), flags, &exit_value);
4915 exim_exit(exit_value, US"main");
4918 /* Handle expansion checking. Either expand items on the command line, or read
4919 from stdin if there aren't any. If -Mset was specified, load the message so
4920 that its variables can be used, but restrict this facility to admin users.
4921 Otherwise, if -bem was used, read a message from stdin. */
4925 dns_init(FALSE, FALSE, FALSE);
4926 if (msg_action_arg > 0 && msg_action == MSG_LOAD)
4928 uschar spoolname[256]; /* Not big_buffer; used in spool_read_header() */
4930 exim_fail("exim: permission denied\n");
4931 message_id = argv[msg_action_arg];
4932 (void)string_format(spoolname, sizeof(spoolname), "%s-H", message_id);
4933 if ((deliver_datafile = spool_open_datafile(message_id)) < 0)
4934 printf ("Failed to load message datafile %s\n", message_id);
4935 if (spool_read_header(spoolname, TRUE, FALSE) != spool_read_OK)
4936 printf ("Failed to load message %s\n", message_id);
4939 /* Read a test message from a file. We fudge it up to be on stdin, saving
4940 stdin itself for later reading of expansion strings. */
4942 else if (expansion_test_message)
4944 int save_stdin = dup(0);
4945 int fd = Uopen(expansion_test_message, O_RDONLY, 0);
4947 exim_fail("exim: failed to open %s: %s\n", expansion_test_message,
4950 filter_test = FTEST_USER; /* Fudge to make it look like filter test */
4951 message_ended = END_NOTENDED;
4952 read_message_body(receive_msg(extract_recipients));
4953 message_linecount += body_linecount;
4954 (void)dup2(save_stdin, 0);
4955 (void)close(save_stdin);
4956 clearerr(stdin); /* Required by Darwin */
4959 /* Only admin users may see config-file macros this way */
4961 if (!f.admin_user) macros_user = macros = mlast = NULL;
4963 /* Allow $recipients for this testing */
4965 f.enable_dollar_recipients = TRUE;
4967 /* Expand command line items */
4969 if (recipients_arg < argc)
4970 while (recipients_arg < argc)
4971 expansion_test_line(argv[recipients_arg++]);
4977 char *(*fn_readline)(const char *) = NULL;
4978 void (*fn_addhist)(const char *) = NULL;
4982 void *dlhandle = set_readline(&fn_readline, &fn_addhist);
4985 while (s = get_stdinput(fn_readline, fn_addhist))
4986 expansion_test_line(s);
4989 if (dlhandle) dlclose(dlhandle);
4993 /* The data file will be open after -Mset */
4995 if (deliver_datafile >= 0)
4997 (void)close(deliver_datafile);
4998 deliver_datafile = -1;
5001 exim_exit(EXIT_SUCCESS, US"main: expansion test");
5005 /* The active host name is normally the primary host name, but it can be varied
5006 for hosts that want to play several parts at once. We need to ensure that it is
5007 set for host checking, and for receiving messages. */
5009 smtp_active_hostname = primary_hostname;
5010 if (raw_active_hostname != NULL)
5012 uschar *nah = expand_string(raw_active_hostname);
5015 if (!f.expand_string_forcedfail)
5016 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to expand \"%s\" "
5017 "(smtp_active_hostname): %s", raw_active_hostname,
5018 expand_string_message);
5020 else if (nah[0] != 0) smtp_active_hostname = nah;
5023 /* Handle host checking: this facility mocks up an incoming SMTP call from a
5024 given IP address so that the blocking and relay configuration can be tested.
5025 Unless a sender_ident was set by -oMt, we discard it (the default is the
5026 caller's login name). An RFC 1413 call is made only if we are running in the
5027 test harness and an incoming interface and both ports are specified, because
5028 there is no TCP/IP call to find the ident for. */
5035 if (!sender_ident_set)
5037 sender_ident = NULL;
5038 if (f.running_in_test_harness && sender_host_port
5039 && interface_address && interface_port)
5040 verify_get_ident(1223); /* note hardwired port number */
5043 /* In case the given address is a non-canonical IPv6 address, canonicalize
5044 it. The code works for both IPv4 and IPv6, as it happens. */
5046 size = host_aton(sender_host_address, x);
5047 sender_host_address = store_get(48, FALSE); /* large enough for full IPv6 */
5048 (void)host_nmtoa(size, x, -1, sender_host_address, ':');
5050 /* Now set up for testing */
5052 host_build_sender_fullhost();
5056 f.sender_local = FALSE;
5057 f.sender_host_notsocket = TRUE;
5058 debug_file = stderr;
5059 debug_fd = fileno(debug_file);
5060 fprintf(stdout, "\n**** SMTP testing session as if from host %s\n"
5061 "**** but without any ident (RFC 1413) callback.\n"
5062 "**** This is not for real!\n\n",
5063 sender_host_address);
5065 memset(sender_host_cache, 0, sizeof(sender_host_cache));
5066 if (verify_check_host(&hosts_connection_nolog) == OK)
5067 BIT_CLEAR(log_selector, log_selector_size, Li_smtp_connection);
5068 log_write(L_smtp_connection, LOG_MAIN, "%s", smtp_get_connection_info());
5070 /* NOTE: We do *not* call smtp_log_no_mail() if smtp_start_session() fails,
5071 because a log line has already been written for all its failure exists
5072 (usually "connection refused: <reason>") and writing another one is
5073 unnecessary clutter. */
5075 if (smtp_start_session())
5077 for (; (reset_point = store_mark()); store_reset(reset_point))
5079 if (smtp_setup_msg() <= 0) break;
5080 if (!receive_msg(FALSE)) break;
5082 return_path = sender_address = NULL;
5083 dnslist_domain = dnslist_matched = NULL;
5084 #ifndef DISABLE_DKIM
5085 dkim_cur_signer = NULL;
5088 deliver_localpart_orig = NULL;
5089 deliver_domain_orig = NULL;
5090 callout_address = sending_ip_address = NULL;
5091 sender_rate = sender_rate_limit = sender_rate_period = NULL;
5095 exim_exit(EXIT_SUCCESS, US"main");
5099 /* Arrange for message reception if recipients or SMTP were specified;
5100 otherwise complain unless a version print (-bV) happened or this is a filter
5101 verification test or info dump.
5102 In the former case, show the configuration file name. */
5104 if (recipients_arg >= argc && !extract_recipients && !smtp_input)
5106 if (version_printed)
5108 if (Ustrchr(config_main_filelist, ':'))
5109 printf("Configuration file search path is %s\n", config_main_filelist);
5110 printf("Configuration file is %s\n", config_main_filename);
5111 return EXIT_SUCCESS;
5114 if (info_flag != CMDINFO_NONE)
5116 show_exim_information(info_flag, info_stdout ? stdout : stderr);
5117 return info_stdout ? EXIT_SUCCESS : EXIT_FAILURE;
5120 if (filter_test == FTEST_NONE)
5121 exim_usage(called_as);
5125 /* If mua_wrapper is set, Exim is being used to turn an MUA that submits on the
5126 standard input into an MUA that submits to a smarthost over TCP/IP. We know
5127 that we are not called from inetd, because that is rejected above. The
5128 following configuration settings are forced here:
5130 (1) Synchronous delivery (-odi)
5131 (2) Errors to stderr (-oep == -oeq)
5132 (3) No parallel remote delivery
5133 (4) Unprivileged delivery
5135 We don't force overall queueing options because there are several of them;
5136 instead, queueing is avoided below when mua_wrapper is set. However, we do need
5137 to override any SMTP queueing. */
5141 f.synchronous_delivery = TRUE;
5142 arg_error_handling = ERRORS_STDERR;
5143 remote_max_parallel = 1;
5144 deliver_drop_privilege = TRUE;
5145 f.queue_smtp = FALSE;
5146 queue_smtp_domains = NULL;
5148 message_utf8_downconvert = -1; /* convert-if-needed */
5153 /* Prepare to accept one or more new messages on the standard input. When a
5154 message has been read, its id is returned in message_id[]. If doing immediate
5155 delivery, we fork a delivery process for each received message, except for the
5156 last one, where we can save a process switch.
5158 It is only in non-smtp mode that error_handling is allowed to be changed from
5159 its default of ERRORS_SENDER by argument. (Idle thought: are any of the
5160 sendmail error modes other than -oem ever actually used? Later: yes.) */
5162 if (!smtp_input) error_handling = arg_error_handling;
5164 /* If this is an inetd call, ensure that stderr is closed to prevent panic
5165 logging being sent down the socket and make an identd call to get the
5168 else if (f.is_inetd)
5170 (void)fclose(stderr);
5171 exim_nullstd(); /* Re-open to /dev/null */
5172 verify_get_ident(IDENT_PORT);
5173 host_build_sender_fullhost();
5174 set_process_info("handling incoming connection from %s via inetd",
5178 /* If the sender host address has been set, build sender_fullhost if it hasn't
5179 already been done (which it will have been for inetd). This caters for the
5180 case when it is forced by -oMa. However, we must flag that it isn't a socket,
5181 so that the test for IP options is skipped for -bs input. */
5183 if (sender_host_address && !sender_fullhost)
5185 host_build_sender_fullhost();
5186 set_process_info("handling incoming connection from %s via -oMa",
5188 f.sender_host_notsocket = TRUE;
5191 /* Otherwise, set the sender host as unknown except for inetd calls. This
5192 prevents host checking in the case of -bs not from inetd and also for -bS. */
5194 else if (!f.is_inetd) f.sender_host_unknown = TRUE;
5196 /* If stdout does not exist, then dup stdin to stdout. This can happen
5197 if exim is started from inetd. In this case fd 0 will be set to the socket,
5198 but fd 1 will not be set. This also happens for passed SMTP channels. */
5200 if (fstat(1, &statbuf) < 0) (void)dup2(0, 1);
5202 /* Set up the incoming protocol name and the state of the program. Root is
5203 allowed to force received protocol via the -oMr option above. If we have come
5204 via inetd, the process info has already been set up. We don't set
5205 received_protocol here for smtp input, as it varies according to
5206 batch/HELO/EHLO/AUTH/TLS. */
5210 if (!f.is_inetd) set_process_info("accepting a local %sSMTP message from <%s>",
5211 smtp_batched_input? "batched " : "",
5212 (sender_address!= NULL)? sender_address : originator_login);
5216 int old_pool = store_pool;
5217 store_pool = POOL_PERM;
5218 if (!received_protocol)
5219 received_protocol = string_sprintf("local%s", called_as);
5220 store_pool = old_pool;
5221 set_process_info("accepting a local non-SMTP message from <%s>",
5225 /* Initialize the session_local_queue-only flag (this will be ignored if
5226 mua_wrapper is set) */
5229 session_local_queue_only = queue_only;
5231 /* For non-SMTP and for batched SMTP input, check that there is enough space on
5232 the spool if so configured. On failure, we must not attempt to send an error
5233 message! (For interactive SMTP, the check happens at MAIL FROM and an SMTP
5234 error code is given.) */
5236 if ((!smtp_input || smtp_batched_input) && !receive_check_fs(0))
5237 exim_fail("exim: insufficient disk space\n");
5239 /* If this is smtp input of any kind, real or batched, handle the start of the
5242 NOTE: We do *not* call smtp_log_no_mail() if smtp_start_session() fails,
5243 because a log line has already been written for all its failure exists
5244 (usually "connection refused: <reason>") and writing another one is
5245 unnecessary clutter. */
5251 memset(sender_host_cache, 0, sizeof(sender_host_cache));
5252 if (verify_check_host(&hosts_connection_nolog) == OK)
5253 BIT_CLEAR(log_selector, log_selector_size, Li_smtp_connection);
5254 log_write(L_smtp_connection, LOG_MAIN, "%s", smtp_get_connection_info());
5255 if (!smtp_start_session())
5258 exim_exit(EXIT_SUCCESS, US"smtp_start toplevel");
5262 /* Otherwise, set up the input size limit here. */
5266 thismessage_size_limit = expand_string_integer(message_size_limit, TRUE);
5267 if (expand_string_message)
5268 if (thismessage_size_limit == -1)
5269 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to expand "
5270 "message_size_limit: %s", expand_string_message);
5272 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "invalid value for "
5273 "message_size_limit: %s", expand_string_message);
5276 /* Loop for several messages when reading SMTP input. If we fork any child
5277 processes, we don't want to wait for them unless synchronous delivery is
5278 requested, so set SIGCHLD to SIG_IGN in that case. This is not necessarily the
5279 same as SIG_DFL, despite the fact that documentation often lists the default as
5280 "ignore". This is a confusing area. This is what I know:
5282 At least on some systems (e.g. Solaris), just setting SIG_IGN causes child
5283 processes that complete simply to go away without ever becoming defunct. You
5284 can't then wait for them - but we don't want to wait for them in the
5285 non-synchronous delivery case. However, this behaviour of SIG_IGN doesn't
5286 happen for all OS (e.g. *BSD is different).
5288 But that's not the end of the story. Some (many? all?) systems have the
5289 SA_NOCLDWAIT option for sigaction(). This requests the behaviour that Solaris
5290 has by default, so it seems that the difference is merely one of default
5291 (compare restarting vs non-restarting signals).
5293 To cover all cases, Exim sets SIG_IGN with SA_NOCLDWAIT here if it can. If not,
5294 it just sets SIG_IGN. To be on the safe side it also calls waitpid() at the end
5295 of the loop below. Paranoia rules.
5297 February 2003: That's *still* not the end of the story. There are now versions
5298 of Linux (where SIG_IGN does work) that are picky. If, having set SIG_IGN, a
5299 process then calls waitpid(), a grumble is written to the system log, because
5300 this is logically inconsistent. In other words, it doesn't like the paranoia.
5301 As a consequence of this, the waitpid() below is now excluded if we are sure
5302 that SIG_IGN works. */
5304 if (!f.synchronous_delivery)
5307 struct sigaction act;
5308 act.sa_handler = SIG_IGN;
5309 sigemptyset(&(act.sa_mask));
5310 act.sa_flags = SA_NOCLDWAIT;
5311 sigaction(SIGCHLD, &act, NULL);
5313 signal(SIGCHLD, SIG_IGN);
5317 /* Save the current store pool point, for resetting at the start of
5318 each message, and save the real sender address, if any. */
5320 real_sender_address = sender_address;
5322 /* Loop to receive messages; receive_msg() returns TRUE if there are more
5323 messages to be read (SMTP input), or FALSE otherwise (not SMTP, or SMTP channel
5328 reset_point = store_mark();
5331 /* Handle the SMTP case; call smtp_setup_mst() to deal with the initial SMTP
5332 input and build the recipients list, before calling receive_msg() to read the
5333 message proper. Whatever sender address is given in the SMTP transaction is
5334 often ignored for local senders - we use the actual sender, which is normally
5335 either the underlying user running this process or a -f argument provided by
5336 a trusted caller. It is saved in real_sender_address. The test for whether to
5337 accept the SMTP sender is encapsulated in receive_check_set_sender(). */
5342 if ((rc = smtp_setup_msg()) > 0)
5344 if (real_sender_address != NULL &&
5345 !receive_check_set_sender(sender_address))
5347 sender_address = raw_sender = real_sender_address;
5348 sender_address_unrewritten = NULL;
5351 /* For batched SMTP, we have to run the acl_not_smtp_start ACL, since it
5352 isn't really SMTP, so no other ACL will run until the acl_not_smtp one at
5353 the very end. The result of the ACL is ignored (as for other non-SMTP
5354 messages). It is run for its potential side effects. */
5356 if (smtp_batched_input && acl_not_smtp_start != NULL)
5358 uschar *user_msg, *log_msg;
5359 f.enable_dollar_recipients = TRUE;
5360 (void)acl_check(ACL_WHERE_NOTSMTP_START, NULL, acl_not_smtp_start,
5361 &user_msg, &log_msg);
5362 f.enable_dollar_recipients = FALSE;
5365 /* Now get the data for the message */
5367 more = receive_msg(extract_recipients);
5368 if (message_id[0] == 0)
5370 cancel_cutthrough_connection(TRUE, US"receive dropped");
5371 if (more) goto moreloop;
5372 smtp_log_no_mail(); /* Log no mail if configured */
5373 exim_exit(EXIT_FAILURE, US"receive toplevel");
5378 cancel_cutthrough_connection(TRUE, US"message setup dropped");
5379 smtp_log_no_mail(); /* Log no mail if configured */
5380 exim_exit(rc ? EXIT_FAILURE : EXIT_SUCCESS, US"msg setup toplevel");
5384 /* In the non-SMTP case, we have all the information from the command
5385 line, but must process it in case it is in the more general RFC822
5386 format, and in any case, to detect syntax errors. Also, it appears that
5387 the use of comma-separated lists as single arguments is common, so we
5388 had better support them. */
5393 int count = argc - recipients_arg;
5394 uschar **list = argv + recipients_arg;
5396 /* These options cannot be changed dynamically for non-SMTP messages */
5398 f.active_local_sender_retain = local_sender_retain;
5399 f.active_local_from_check = local_from_check;
5401 /* Save before any rewriting */
5403 raw_sender = string_copy(sender_address);
5405 /* Loop for each argument (supplied by user hence tainted) */
5407 for (int i = 0; i < count; i++)
5409 int start, end, domain;
5411 uschar * s = string_copy_taint(list[i], TRUE);
5413 /* Loop for each comma-separated address */
5417 BOOL finished = FALSE;
5419 uschar *ss = parse_find_address_end(s, FALSE);
5421 if (*ss == ',') *ss = 0; else finished = TRUE;
5423 /* Check max recipients - if -t was used, these aren't recipients */
5425 if (recipients_max > 0 && ++rcount > recipients_max &&
5426 !extract_recipients)
5427 if (error_handling == ERRORS_STDERR)
5429 fprintf(stderr, "exim: too many recipients\n");
5430 exim_exit(EXIT_FAILURE, US"main");
5434 moan_to_sender(ERRMESS_TOOMANYRECIP, NULL, NULL, stdin, TRUE)?
5435 errors_sender_rc : EXIT_FAILURE;
5439 BOOL b = allow_utf8_domains;
5440 allow_utf8_domains = TRUE;
5443 parse_extract_address(s, &errmess, &start, &end, &domain, FALSE);
5446 if (string_is_utf8(recipient))
5447 message_smtputf8 = TRUE;
5449 allow_utf8_domains = b;
5452 if (domain == 0 && !f.allow_unqualified_recipient)
5455 errmess = US"unqualified recipient address not allowed";
5458 if (recipient == NULL)
5460 if (error_handling == ERRORS_STDERR)
5462 fprintf(stderr, "exim: bad recipient address \"%s\": %s\n",
5463 string_printing(list[i]), errmess);
5464 exim_exit(EXIT_FAILURE, US"main");
5470 eblock.text1 = string_printing(list[i]);
5471 eblock.text2 = errmess;
5473 moan_to_sender(ERRMESS_BADARGADDRESS, &eblock, NULL, stdin, TRUE)?
5474 errors_sender_rc : EXIT_FAILURE;
5478 receive_add_recipient(string_copy_taint(recipient, TRUE), -1);
5481 while (*(++s) != 0 && (*s == ',' || isspace(*s)));
5485 /* Show the recipients when debugging */
5489 if (sender_address != NULL) debug_printf("Sender: %s\n", sender_address);
5490 if (recipients_list != NULL)
5492 debug_printf("Recipients:\n");
5493 for (int i = 0; i < recipients_count; i++)
5494 debug_printf(" %s\n", recipients_list[i].address);
5498 /* Run the acl_not_smtp_start ACL if required. The result of the ACL is
5499 ignored; rejecting here would just add complication, and it can just as
5500 well be done later. Allow $recipients to be visible in the ACL. */
5502 if (acl_not_smtp_start)
5504 uschar *user_msg, *log_msg;
5505 f.enable_dollar_recipients = TRUE;
5506 (void)acl_check(ACL_WHERE_NOTSMTP_START, NULL, acl_not_smtp_start,
5507 &user_msg, &log_msg);
5508 f.enable_dollar_recipients = FALSE;
5511 /* Pause for a while waiting for input. If none received in that time,
5512 close the logfile, if we had one open; then if we wait for a long-running
5513 datasource (months, in one use-case) log rotation will not leave us holding
5516 if (!receive_timeout)
5518 struct timeval t = { .tv_sec = 30*60, .tv_usec = 0 }; /* 30 minutes */
5521 FD_ZERO(&r); FD_SET(0, &r);
5522 if (select(1, &r, NULL, NULL, &t) == 0) mainlog_close();
5525 /* Read the data for the message. If filter_test is not FTEST_NONE, this
5526 will just read the headers for the message, and not write anything onto the
5529 message_ended = END_NOTENDED;
5530 more = receive_msg(extract_recipients);
5532 /* more is always FALSE here (not SMTP message) when reading a message
5533 for real; when reading the headers of a message for filter testing,
5534 it is TRUE if the headers were terminated by '.' and FALSE otherwise. */
5536 if (message_id[0] == 0) exim_exit(EXIT_FAILURE, US"main");
5537 } /* Non-SMTP message reception */
5539 /* If this is a filter testing run, there are headers in store, but
5540 no message on the spool. Run the filtering code in testing mode, setting
5541 the domain to the qualify domain and the local part to the current user,
5542 unless they have been set by options. The prefix and suffix are left unset
5543 unless specified. The the return path is set to to the sender unless it has
5544 already been set from a return-path header in the message. */
5546 if (filter_test != FTEST_NONE)
5548 deliver_domain = (ftest_domain != NULL)?
5549 ftest_domain : qualify_domain_recipient;
5550 deliver_domain_orig = deliver_domain;
5551 deliver_localpart = (ftest_localpart != NULL)?
5552 ftest_localpart : originator_login;
5553 deliver_localpart_orig = deliver_localpart;
5554 deliver_localpart_prefix = ftest_prefix;
5555 deliver_localpart_suffix = ftest_suffix;
5556 deliver_home = originator_home;
5558 if (return_path == NULL)
5560 printf("Return-path copied from sender\n");
5561 return_path = string_copy(sender_address);
5564 printf("Return-path = %s\n", (return_path[0] == 0)? US"<>" : return_path);
5565 printf("Sender = %s\n", (sender_address[0] == 0)? US"<>" : sender_address);
5567 receive_add_recipient(
5568 string_sprintf("%s%s%s@%s",
5569 (ftest_prefix == NULL)? US"" : ftest_prefix,
5571 (ftest_suffix == NULL)? US"" : ftest_suffix,
5572 deliver_domain), -1);
5574 printf("Recipient = %s\n", recipients_list[0].address);
5575 if (ftest_prefix != NULL) printf("Prefix = %s\n", ftest_prefix);
5576 if (ftest_suffix != NULL) printf("Suffix = %s\n", ftest_suffix);
5578 if (chdir("/")) /* Get away from wherever the user is running this from */
5580 DEBUG(D_receive) debug_printf("chdir(\"/\") failed\n");
5581 exim_exit(EXIT_FAILURE, US"main");
5584 /* Now we run either a system filter test, or a user filter test, or both.
5585 In the latter case, headers added by the system filter will persist and be
5586 available to the user filter. We need to copy the filter variables
5589 if ((filter_test & FTEST_SYSTEM) != 0)
5590 if (!filter_runtest(filter_sfd, filter_test_sfile, TRUE, more))
5591 exim_exit(EXIT_FAILURE, US"main");
5593 memcpy(filter_sn, filter_n, sizeof(filter_sn));
5595 if ((filter_test & FTEST_USER) != 0)
5596 if (!filter_runtest(filter_ufd, filter_test_ufile, FALSE, more))
5597 exim_exit(EXIT_FAILURE, US"main");
5599 exim_exit(EXIT_SUCCESS, US"main");
5602 /* Else act on the result of message reception. We should not get here unless
5603 message_id[0] is non-zero. If queue_only is set, session_local_queue_only
5604 will be TRUE. If it is not, check on the number of messages received in this
5607 if (!session_local_queue_only &&
5608 smtp_accept_queue_per_connection > 0 &&
5609 receive_messagecount > smtp_accept_queue_per_connection)
5611 session_local_queue_only = TRUE;
5612 queue_only_reason = 2;
5615 /* Initialize local_queue_only from session_local_queue_only. If it is false,
5616 and queue_only_load is set, check that the load average is below it. If it is
5617 not, set local_queue_only TRUE. If queue_only_load_latch is true (the
5618 default), we put the whole session into queue_only mode. It then remains this
5619 way for any subsequent messages on the same SMTP connection. This is a
5620 deliberate choice; even though the load average may fall, it doesn't seem
5621 right to deliver later messages on the same call when not delivering earlier
5622 ones. However, there are odd cases where this is not wanted, so this can be
5623 changed by setting queue_only_load_latch false. */
5625 local_queue_only = session_local_queue_only;
5626 if (!local_queue_only && queue_only_load >= 0)
5628 local_queue_only = (load_average = OS_GETLOADAVG()) > queue_only_load;
5629 if (local_queue_only)
5631 queue_only_reason = 3;
5632 if (queue_only_load_latch) session_local_queue_only = TRUE;
5636 /* If running as an MUA wrapper, all queueing options and freezing options
5640 local_queue_only = f.queue_only_policy = f.deliver_freeze = FALSE;
5642 /* Log the queueing here, when it will get a message id attached, but
5643 not if queue_only is set (case 0). Case 1 doesn't happen here (too many
5646 if (local_queue_only)
5648 cancel_cutthrough_connection(TRUE, US"no delivery; queueing");
5649 switch(queue_only_reason)
5652 log_write(L_delay_delivery,
5653 LOG_MAIN, "no immediate delivery: more than %d messages "
5654 "received in one connection", smtp_accept_queue_per_connection);
5658 log_write(L_delay_delivery,
5659 LOG_MAIN, "no immediate delivery: load average %.2f",
5660 (double)load_average/1000.0);
5665 else if (f.queue_only_policy || f.deliver_freeze)
5666 cancel_cutthrough_connection(TRUE, US"no delivery; queueing");
5668 /* Else do the delivery unless the ACL or local_scan() called for queue only
5669 or froze the message. Always deliver in a separate process. A fork failure is
5670 not a disaster, as the delivery will eventually happen on a subsequent queue
5671 run. The search cache must be tidied before the fork, as the parent will
5672 do it before exiting. The child will trigger a lookup failure and
5673 thereby defer the delivery if it tries to use (for example) a cached ldap
5674 connection that the parent has called unbind on. */
5681 if ((pid = fork()) == 0)
5684 close_unwanted(); /* Close unwanted file descriptors and TLS */
5685 exim_nullstd(); /* Ensure std{in,out,err} exist */
5687 /* Re-exec Exim if we need to regain privilege (note: in mua_wrapper
5688 mode, deliver_drop_privilege is forced TRUE). */
5690 if (geteuid() != root_uid && !deliver_drop_privilege && !unprivileged)
5692 delivery_re_exec(CEE_EXEC_EXIT);
5693 /* Control does not return here. */
5696 /* No need to re-exec */
5698 rc = deliver_message(message_id, FALSE, FALSE);
5700 exim_underbar_exit(!mua_wrapper || rc == DELIVER_MUA_SUCCEEDED
5701 ? EXIT_SUCCESS : EXIT_FAILURE);
5706 cancel_cutthrough_connection(TRUE, US"delivery fork failed");
5707 log_write(0, LOG_MAIN|LOG_PANIC, "failed to fork automatic delivery "
5708 "process: %s", strerror(errno));
5712 release_cutthrough_connection(US"msg passed for delivery");
5714 /* In the parent, wait if synchronous delivery is required. This will
5715 always be the case in MUA wrapper mode. */
5717 if (f.synchronous_delivery)
5720 while (wait(&status) != pid);
5721 if ((status & 0x00ff) != 0)
5722 log_write(0, LOG_MAIN|LOG_PANIC,
5723 "process %d crashed with signal %d while delivering %s",
5724 (int)pid, status & 0x00ff, message_id);
5725 if (mua_wrapper && (status & 0xffff) != 0) exim_exit(EXIT_FAILURE, US"main");
5730 /* The loop will repeat if more is TRUE. If we do not know know that the OS
5731 automatically reaps children (see comments above the loop), clear away any
5732 finished subprocesses here, in case there are lots of messages coming in
5733 from the same source. */
5735 #ifndef SIG_IGN_WORKS
5736 while (waitpid(-1, NULL, WNOHANG) > 0);
5740 return_path = sender_address = NULL;
5741 authenticated_sender = NULL;
5742 deliver_localpart_orig = NULL;
5743 deliver_domain_orig = NULL;
5744 deliver_host = deliver_host_address = NULL;
5745 dnslist_domain = dnslist_matched = NULL;
5746 #ifdef WITH_CONTENT_SCAN
5747 malware_name = NULL;
5749 callout_address = NULL;
5750 sending_ip_address = NULL;
5752 for(int i = 0; i < REGEX_VARS; i++) regex_vars[i] = NULL;
5754 store_reset(reset_point);
5757 exim_exit(EXIT_SUCCESS, US"main"); /* Never returns */
5758 return 0; /* To stop compiler warning */