1 /*************************************************
2 * Exim - an Internet mail transport agent *
3 *************************************************/
5 /* Copyright (c) University of Cambridge 1995 - 2018 */
6 /* Copyright (c) The Exim Maintainers 2020 */
7 /* See the file NOTICE for conditions of use and distribution. */
10 /* The main function: entry point, initialization, and high-level control.
11 Also a few functions that don't naturally fit elsewhere. */
16 #if defined(__GLIBC__) && !defined(__UCLIBC__)
17 # include <gnu/libc-version.h>
21 # include <gnutls/gnutls.h>
22 # if GNUTLS_VERSION_NUMBER < 0x030103 && !defined(DISABLE_OCSP)
31 extern void init_lookup_list(void);
35 /*************************************************
36 * Function interface to store functions *
37 *************************************************/
39 /* We need some real functions to pass to the PCRE regular expression library
40 for store allocation via Exim's store manager. The normal calls are actually
41 macros that pass over location information to make tracing easier. These
42 functions just interface to the standard macro calls. A good compiler will
43 optimize out the tail recursion and so not make them too expensive. There
44 are two sets of functions; one for use when we want to retain the compiled
45 regular expression for a long time; the other for short-term use. */
48 function_store_get(size_t size)
50 /* For now, regard all RE results as potentially tainted. We might need
51 more intelligence on this point. */
52 return store_get((int)size, TRUE);
56 function_dummy_free(void * block) {}
59 function_store_malloc(size_t size)
61 return store_malloc((int)size);
65 function_store_free(void * block)
73 /*************************************************
74 * Enums for cmdline interface *
75 *************************************************/
77 enum commandline_info { CMDINFO_NONE=0,
78 CMDINFO_HELP, CMDINFO_SIEVE, CMDINFO_DSCP };
83 /*************************************************
84 * Compile regular expression and panic on fail *
85 *************************************************/
87 /* This function is called when failure to compile a regular expression leads
88 to a panic exit. In other cases, pcre_compile() is called directly. In many
89 cases where this function is used, the results of the compilation are to be
90 placed in long-lived store, so we temporarily reset the store management
91 functions that PCRE uses if the use_malloc flag is set.
94 pattern the pattern to compile
95 caseless TRUE if caseless matching is required
96 use_malloc TRUE if compile into malloc store
98 Returns: pointer to the compiled pattern
102 regex_must_compile(const uschar *pattern, BOOL caseless, BOOL use_malloc)
105 int options = PCRE_COPT;
110 pcre_malloc = function_store_malloc;
111 pcre_free = function_store_free;
113 if (caseless) options |= PCRE_CASELESS;
114 yield = pcre_compile(CCS pattern, options, CCSS &error, &offset, NULL);
115 pcre_malloc = function_store_get;
116 pcre_free = function_dummy_free;
118 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "regular expression error: "
119 "%s at offset %d while compiling %s", error, offset, pattern);
126 /*************************************************
127 * Execute regular expression and set strings *
128 *************************************************/
130 /* This function runs a regular expression match, and sets up the pointers to
131 the matched substrings.
134 re the compiled expression
135 subject the subject string
136 options additional PCRE options
137 setup if < 0 do full setup
138 if >= 0 setup from setup+1 onwards,
139 excluding the full matched string
141 Returns: TRUE or FALSE
145 regex_match_and_setup(const pcre *re, const uschar *subject, int options, int setup)
147 int ovector[3*(EXPAND_MAXN+1)];
148 uschar * s = string_copy(subject); /* de-constifying */
149 int n = pcre_exec(re, NULL, CS s, Ustrlen(s), 0,
150 PCRE_EOPT | options, ovector, nelem(ovector));
152 if (n == 0) n = EXPAND_MAXN + 1;
155 expand_nmax = setup < 0 ? 0 : setup + 1;
156 for (int nn = setup < 0 ? 0 : 2; nn < n*2; nn += 2)
158 expand_nstring[expand_nmax] = s + ovector[nn];
159 expand_nlength[expand_nmax++] = ovector[nn+1] - ovector[nn];
169 /*************************************************
170 * Set up processing details *
171 *************************************************/
173 /* Save a text string for dumping when SIGUSR1 is received.
174 Do checks for overruns.
176 Arguments: format and arguments, as for printf()
181 set_process_info(const char *format, ...)
183 gstring gs = { .size = PROCESS_INFO_SIZE - 2, .ptr = 0, .s = process_info };
188 g = string_fmt_append(&gs, "%5d ", (int)getpid());
190 va_start(ap, format);
191 if (!string_vformat(g, 0, format, ap))
194 g = string_cat(&gs, US"**** string overflowed buffer ****");
196 g = string_catn(g, US"\n", 1);
197 string_from_gstring(g);
198 process_info_len = g->ptr;
199 DEBUG(D_process_info) debug_printf("set_process_info: %s", process_info);
203 /***********************************************
204 * Handler for SIGTERM *
205 ***********************************************/
208 term_handler(int sig)
214 /*************************************************
215 * Handler for SIGUSR1 *
216 *************************************************/
218 /* SIGUSR1 causes any exim process to write to the process log details of
219 what it is currently doing. It will only be used if the OS is capable of
220 setting up a handler that causes automatic restarting of any system call
221 that is in progress at the time.
223 This function takes care to be signal-safe.
225 Argument: the signal number (SIGUSR1)
230 usr1_handler(int sig)
234 os_restarting_signal(sig, usr1_handler);
236 if ((fd = Uopen(process_log_path, O_APPEND|O_WRONLY, LOG_MODE)) < 0)
238 /* If we are already running as the Exim user, try to create it in the
239 current process (assuming spool_directory exists). Otherwise, if we are
240 root, do the creation in an exim:exim subprocess. */
242 int euid = geteuid();
243 if (euid == exim_uid)
244 fd = Uopen(process_log_path, O_CREAT|O_APPEND|O_WRONLY, LOG_MODE);
245 else if (euid == root_uid)
246 fd = log_create_as_exim(process_log_path);
249 /* If we are neither exim nor root, or if we failed to create the log file,
250 give up. There is not much useful we can do with errors, since we don't want
251 to disrupt whatever is going on outside the signal handler. */
255 (void)write(fd, process_info, process_info_len);
261 /*************************************************
263 *************************************************/
265 /* This handler is enabled most of the time that Exim is running. The handler
266 doesn't actually get used unless alarm() has been called to set a timer, to
267 place a time limit on a system call of some kind. When the handler is run, it
270 There are some other SIGALRM handlers that are used in special cases when more
271 than just a flag setting is required; for example, when reading a message's
272 input. These are normally set up in the code module that uses them, and the
273 SIGALRM handler is reset to this one afterwards.
275 Argument: the signal value (SIGALRM)
280 sigalrm_handler(int sig)
283 os_non_restarting_signal(SIGALRM, sigalrm_handler);
288 /*************************************************
289 * Sleep for a fractional time interval *
290 *************************************************/
292 /* This function is called by millisleep() and exim_wait_tick() to wait for a
293 period of time that may include a fraction of a second. The coding is somewhat
294 tedious. We do not expect setitimer() ever to fail, but if it does, the process
295 will wait for ever, so we panic in this instance. (There was a case of this
296 when a bug in a function that calls milliwait() caused it to pass invalid data.
297 That's when I added the check. :-)
299 We assume it to be not worth sleeping for under 50us; this value will
300 require revisiting as hardware advances. This avoids the issue of
301 a zero-valued timer setting meaning "never fire".
303 Argument: an itimerval structure containing the interval
308 milliwait(struct itimerval *itval)
311 sigset_t old_sigmask;
312 int save_errno = errno;
314 if (itval->it_value.tv_usec < 50 && itval->it_value.tv_sec == 0)
316 (void)sigemptyset(&sigmask); /* Empty mask */
317 (void)sigaddset(&sigmask, SIGALRM); /* Add SIGALRM */
318 (void)sigprocmask(SIG_BLOCK, &sigmask, &old_sigmask); /* Block SIGALRM */
319 if (setitimer(ITIMER_REAL, itval, NULL) < 0) /* Start timer */
320 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
321 "setitimer() failed: %s", strerror(errno));
322 (void)sigfillset(&sigmask); /* All signals */
323 (void)sigdelset(&sigmask, SIGALRM); /* Remove SIGALRM */
324 (void)sigsuspend(&sigmask); /* Until SIGALRM */
325 (void)sigprocmask(SIG_SETMASK, &old_sigmask, NULL); /* Restore mask */
327 sigalrm_seen = FALSE;
333 /*************************************************
334 * Millisecond sleep function *
335 *************************************************/
337 /* The basic sleep() function has a granularity of 1 second, which is too rough
338 in some cases - for example, when using an increasing delay to slow down
341 Argument: number of millseconds
348 struct itimerval itval = {.it_interval = {.tv_sec = 0, .tv_usec = 0},
349 .it_value = {.tv_sec = msec/1000,
350 .tv_usec = (msec % 1000) * 1000}};
356 /*************************************************
357 * Compare microsecond times *
358 *************************************************/
365 Returns: -1, 0, or +1
369 exim_tvcmp(struct timeval *t1, struct timeval *t2)
371 if (t1->tv_sec > t2->tv_sec) return +1;
372 if (t1->tv_sec < t2->tv_sec) return -1;
373 if (t1->tv_usec > t2->tv_usec) return +1;
374 if (t1->tv_usec < t2->tv_usec) return -1;
381 /*************************************************
382 * Clock tick wait function *
383 *************************************************/
385 #ifdef _POSIX_MONOTONIC_CLOCK
386 # ifdef CLOCK_BOOTTIME
387 # define EXIM_CLOCKTYPE CLOCK_BOOTTIME
389 # define EXIM_CLOCKTYPE CLOCK_MONOTONIC
392 /* Amount EXIM_CLOCK is behind realtime, at startup. */
393 static struct timespec offset_ts;
396 exim_clock_init(void)
399 if (clock_gettime(EXIM_CLOCKTYPE, &offset_ts) != 0) return;
400 (void)gettimeofday(&tv, NULL);
401 offset_ts.tv_sec = tv.tv_sec - offset_ts.tv_sec;
402 offset_ts.tv_nsec = tv.tv_usec * 1000 - offset_ts.tv_nsec;
403 if (offset_ts.tv_nsec >= 0) return;
405 offset_ts.tv_nsec += 1000*1000*1000;
411 exim_gettime(struct timeval * tv)
413 #ifdef _POSIX_MONOTONIC_CLOCK
414 struct timespec now_ts;
416 if (clock_gettime(EXIM_CLOCKTYPE, &now_ts) == 0)
418 now_ts.tv_sec += offset_ts.tv_sec;
419 if ((now_ts.tv_nsec += offset_ts.tv_nsec) >= 1000*1000*1000)
422 now_ts.tv_nsec -= 1000*1000*1000;
424 tv->tv_sec = now_ts.tv_sec;
425 tv->tv_usec = now_ts.tv_nsec / 1000;
429 (void)gettimeofday(tv, NULL);
433 /* Exim uses a time + a pid to generate a unique identifier in two places: its
434 message IDs, and in file names for maildir deliveries. Because some OS now
435 re-use pids within the same second, sub-second times are now being used.
436 However, for absolute certainty, we must ensure the clock has ticked before
437 allowing the relevant process to complete. At the time of implementation of
438 this code (February 2003), the speed of processors is such that the clock will
439 invariably have ticked already by the time a process has done its job. This
440 function prepares for the time when things are faster - and it also copes with
441 clocks that go backwards.
444 tgt_tv A timeval which was used to create uniqueness; its usec field
445 has been rounded down to the value of the resolution.
446 We want to be sure the current time is greater than this.
447 resolution The resolution that was used to divide the microseconds
448 (1 for maildir, larger for message ids)
454 exim_wait_tick(struct timeval * tgt_tv, int resolution)
456 struct timeval now_tv;
457 long int now_true_usec;
459 exim_gettime(&now_tv);
460 now_true_usec = now_tv.tv_usec;
461 now_tv.tv_usec = (now_true_usec/resolution) * resolution;
463 while (exim_tvcmp(&now_tv, tgt_tv) <= 0)
465 struct itimerval itval;
466 itval.it_interval.tv_sec = 0;
467 itval.it_interval.tv_usec = 0;
468 itval.it_value.tv_sec = tgt_tv->tv_sec - now_tv.tv_sec;
469 itval.it_value.tv_usec = tgt_tv->tv_usec + resolution - now_true_usec;
471 /* We know that, overall, "now" is less than or equal to "then". Therefore, a
472 negative value for the microseconds is possible only in the case when "now"
473 is more than a second less than "tgt". That means that itval.it_value.tv_sec
474 is greater than zero. The following correction is therefore safe. */
476 if (itval.it_value.tv_usec < 0)
478 itval.it_value.tv_usec += 1000000;
479 itval.it_value.tv_sec -= 1;
482 DEBUG(D_transport|D_receive)
484 if (!f.running_in_test_harness)
486 debug_printf("tick check: " TIME_T_FMT ".%06lu " TIME_T_FMT ".%06lu\n",
487 tgt_tv->tv_sec, (long) tgt_tv->tv_usec,
488 now_tv.tv_sec, (long) now_tv.tv_usec);
489 debug_printf("waiting " TIME_T_FMT ".%06lu sec\n",
490 itval.it_value.tv_sec, (long) itval.it_value.tv_usec);
496 /* Be prapared to go around if the kernel does not implement subtick
497 granularity (GNU Hurd) */
499 exim_gettime(&now_tv);
500 now_true_usec = now_tv.tv_usec;
501 now_tv.tv_usec = (now_true_usec/resolution) * resolution;
508 /*************************************************
509 * Call fopen() with umask 777 and adjust mode *
510 *************************************************/
512 /* Exim runs with umask(0) so that files created with open() have the mode that
513 is specified in the open() call. However, there are some files, typically in
514 the spool directory, that are created with fopen(). They end up world-writeable
515 if no precautions are taken. Although the spool directory is not accessible to
516 the world, this is an untidiness. So this is a wrapper function for fopen()
517 that sorts out the mode of the created file.
520 filename the file name
521 options the fopen() options
522 mode the required mode
524 Returns: the fopened FILE or NULL
528 modefopen(const uschar *filename, const char *options, mode_t mode)
530 mode_t saved_umask = umask(0777);
531 FILE *f = Ufopen(filename, options);
532 (void)umask(saved_umask);
533 if (f != NULL) (void)fchmod(fileno(f), mode);
538 /*************************************************
539 * Ensure stdin, stdout, and stderr exist *
540 *************************************************/
542 /* Some operating systems grumble if an exec() happens without a standard
543 input, output, and error (fds 0, 1, 2) being defined. The worry is that some
544 file will be opened and will use these fd values, and then some other bit of
545 code will assume, for example, that it can write error messages to stderr.
546 This function ensures that fds 0, 1, and 2 are open if they do not already
547 exist, by connecting them to /dev/null.
549 This function is also used to ensure that std{in,out,err} exist at all times,
550 so that if any library that Exim calls tries to use them, it doesn't crash.
561 for (int i = 0; i <= 2; i++)
563 if (fstat(i, &statbuf) < 0 && errno == EBADF)
565 if (devnull < 0) devnull = open("/dev/null", O_RDWR);
566 if (devnull < 0) log_write(0, LOG_MAIN|LOG_PANIC_DIE, "%s",
567 string_open_failed("/dev/null", NULL));
568 if (devnull != i) (void)dup2(devnull, i);
571 if (devnull > 2) (void)close(devnull);
577 /*************************************************
578 * Close unwanted file descriptors for delivery *
579 *************************************************/
581 /* This function is called from a new process that has been forked to deliver
582 an incoming message, either directly, or using exec.
584 We want any smtp input streams to be closed in this new process. However, it
585 has been observed that using fclose() here causes trouble. When reading in -bS
586 input, duplicate copies of messages have been seen. The files will be sharing a
587 file pointer with the parent process, and it seems that fclose() (at least on
588 some systems - I saw this on Solaris 2.5.1) messes with that file pointer, at
589 least sometimes. Hence we go for closing the underlying file descriptors.
591 If TLS is active, we want to shut down the TLS library, but without molesting
592 the parent's SSL connection.
594 For delivery of a non-SMTP message, we want to close stdin and stdout (and
595 stderr unless debugging) because the calling process might have set them up as
596 pipes and be waiting for them to close before it waits for the submission
597 process to terminate. If they aren't closed, they hold up the calling process
598 until the initial delivery process finishes, which is not what we want.
600 Exception: We do want it for synchronous delivery!
602 And notwithstanding all the above, if D_resolver is set, implying resolver
603 debugging, leave stdout open, because that's where the resolver writes its
606 When we close stderr (which implies we've also closed stdout), we also get rid
607 of any controlling terminal.
619 tls_close(NULL, TLS_NO_SHUTDOWN); /* Shut down the TLS library */
621 (void)close(fileno(smtp_in));
622 (void)close(fileno(smtp_out));
627 (void)close(0); /* stdin */
628 if ((debug_selector & D_resolver) == 0) (void)close(1); /* stdout */
629 if (debug_selector == 0) /* stderr */
631 if (!f.synchronous_delivery)
644 /*************************************************
646 *************************************************/
648 /* This function sets a new uid and gid permanently, optionally calling
649 initgroups() to set auxiliary groups. There are some special cases when running
650 Exim in unprivileged modes. In these situations the effective uid will not be
651 root; if we already have the right effective uid/gid, and don't need to
652 initialize any groups, leave things as they are.
657 igflag TRUE if initgroups() wanted
658 msg text to use in debugging output and failure log
660 Returns: nothing; bombs out on failure
664 exim_setugid(uid_t uid, gid_t gid, BOOL igflag, uschar *msg)
666 uid_t euid = geteuid();
667 gid_t egid = getegid();
669 if (euid == root_uid || euid != uid || egid != gid || igflag)
671 /* At least one OS returns +1 for initgroups failure, so just check for
676 struct passwd *pw = getpwuid(uid);
678 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "cannot run initgroups(): "
679 "no passwd entry for uid=%ld", (long int)uid);
681 if (initgroups(pw->pw_name, gid) != 0)
682 log_write(0,LOG_MAIN|LOG_PANIC_DIE,"initgroups failed for uid=%ld: %s",
683 (long int)uid, strerror(errno));
686 if (setgid(gid) < 0 || setuid(uid) < 0)
687 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "unable to set gid=%ld or uid=%ld "
688 "(euid=%ld): %s", (long int)gid, (long int)uid, (long int)euid, msg);
691 /* Debugging output included uid/gid and all groups */
695 int group_count, save_errno;
696 gid_t group_list[EXIM_GROUPLIST_SIZE];
697 debug_printf("changed uid/gid: %s\n uid=%ld gid=%ld pid=%ld\n", msg,
698 (long int)geteuid(), (long int)getegid(), (long int)getpid());
699 group_count = getgroups(nelem(group_list), group_list);
701 debug_printf(" auxiliary group list:");
703 for (int i = 0; i < group_count; i++) debug_printf(" %d", (int)group_list[i]);
704 else if (group_count < 0)
705 debug_printf(" <error: %s>", strerror(save_errno));
706 else debug_printf(" <none>");
714 /*************************************************
716 *************************************************/
718 /* Exim exits via this function so that it always clears up any open
724 Returns: does not return
733 debug_printf(">>>>>>>>>>>>>>>> Exim pid=%d (%s) terminating with rc=%d "
734 ">>>>>>>>>>>>>>>>\n",
735 (int)getpid(), process_purpose, rc);
741 exim_underbar_exit(int rc)
745 debug_printf(">>>>>>>>>>>>>>>> Exim pid=%d (%s) terminating with rc=%d "
746 ">>>>>>>>>>>>>>>>\n",
747 (int)getpid(), process_purpose, rc);
753 /* Print error string, then die */
755 exim_fail(const char * fmt, ...)
759 vfprintf(stderr, fmt, ap);
763 /* exim_chown_failure() called from exim_chown()/exim_fchown() on failure
764 of chown()/fchown(). See src/functions.h for more explanation */
766 exim_chown_failure(int fd, const uschar *name, uid_t owner, gid_t group)
768 int saved_errno = errno; /* from the preceeding chown call */
770 log_write(0, LOG_MAIN|LOG_PANIC,
771 __FILE__ ":%d: chown(%s, %d:%d) failed (%s)."
772 " Please contact the authors and refer to https://bugs.exim.org/show_bug.cgi?id=2391",
773 __LINE__, name?name:US"<unknown>", owner, group, strerror(errno));
775 /* I leave this here, commented, in case the "bug"(?) comes up again.
776 It is not an Exim bug, but we can provide a workaround.
782 if (0 == (fd < 0 ? stat(name, &buf) : fstat(fd, &buf)))
784 if (buf.st_uid == owner && buf.st_gid == group) return 0;
785 log_write(0, LOG_MAIN|LOG_PANIC, "Wrong ownership on %s", name);
787 else log_write(0, LOG_MAIN|LOG_PANIC, "Stat failed on %s: %s", name, strerror(errno));
795 /*************************************************
796 * Extract port from host address *
797 *************************************************/
799 /* Called to extract the port from the values given to -oMa and -oMi.
800 It also checks the syntax of the address, and terminates it before the
801 port data when a port is extracted.
804 address the address, with possible port on the end
806 Returns: the port, or zero if there isn't one
807 bombs out on a syntax error
811 check_port(uschar *address)
813 int port = host_address_extract_port(address);
814 if (string_is_ip_address(address, NULL) == 0)
815 exim_fail("exim abandoned: \"%s\" is not an IP address\n", address);
821 /*************************************************
822 * Test/verify an address *
823 *************************************************/
825 /* This function is called by the -bv and -bt code. It extracts a working
826 address from a full RFC 822 address. This isn't really necessary per se, but it
827 has the effect of collapsing source routes.
831 flags flag bits for verify_address()
832 exit_value to be set for failures
838 test_address(uschar *s, int flags, int *exit_value)
840 int start, end, domain;
841 uschar *parse_error = NULL;
842 uschar *address = parse_extract_address(s, &parse_error, &start, &end, &domain,
846 fprintf(stdout, "syntax error: %s\n", parse_error);
851 int rc = verify_address(deliver_make_addr(address,TRUE), stdout, flags, -1,
852 -1, -1, NULL, NULL, NULL);
853 if (rc == FAIL) *exit_value = 2;
854 else if (rc == DEFER && *exit_value == 0) *exit_value = 1;
860 /*************************************************
861 * Show supported features *
862 *************************************************/
865 show_db_version(FILE * f)
867 #ifdef DB_VERSION_STRING
870 fprintf(f, "Library version: BDB: Compile: %s\n", DB_VERSION_STRING);
871 fprintf(f, " Runtime: %s\n",
872 db_version(NULL, NULL, NULL));
875 fprintf(f, "Berkeley DB: %s\n", DB_VERSION_STRING);
877 #elif defined(BTREEVERSION) && defined(HASHVERSION)
879 fprintf(f, "Probably Berkeley DB version 1.8x (native mode)\n");
881 fprintf(f, "Probably Berkeley DB version 1.8x (compatibility mode)\n");
884 #elif defined(_DBM_RDONLY) || defined(dbm_dirfno)
885 fprintf(f, "Probably ndbm\n");
886 #elif defined(USE_TDB)
887 fprintf(f, "Using tdb\n");
890 fprintf(f, "Probably GDBM (native mode)\n");
892 fprintf(f, "Probably GDBM (compatibility mode)\n");
898 /* This function is called for -bV/--version and for -d to output the optional
899 features of the current Exim binary.
901 Arguments: a FILE for printing
906 show_whats_supported(FILE * fp)
908 rmark reset_point = store_mark();
910 DEBUG(D_any) {} else show_db_version(fp);
912 g = string_cat(NULL, US"Support for:");
913 #ifdef SUPPORT_CRYPTEQ
914 g = string_cat(g, US" crypteq");
917 g = string_cat(g, US" iconv()");
920 g = string_cat(g, US" IPv6");
922 #ifdef HAVE_SETCLASSRESOURCES
923 g = string_cat(g, US" use_setclassresources");
926 g = string_cat(g, US" PAM");
929 g = string_cat(g, US" Perl");
932 g = string_cat(g, US" Expand_dlfunc");
934 #ifdef USE_TCP_WRAPPERS
935 g = string_cat(g, US" TCPwrappers");
938 g = string_cat(g, US" GnuTLS");
941 g = string_cat(g, US" OpenSSL");
943 #ifndef DISABLE_TLS_RESUME
944 g = string_cat(g, US" TLS_resume");
946 #ifdef SUPPORT_TRANSLATE_IP_ADDRESS
947 g = string_cat(g, US" translate_ip_address");
949 #ifdef SUPPORT_MOVE_FROZEN_MESSAGES
950 g = string_cat(g, US" move_frozen_messages");
952 #ifdef WITH_CONTENT_SCAN
953 g = string_cat(g, US" Content_Scanning");
956 g = string_cat(g, US" DANE");
959 g = string_cat(g, US" DKIM");
962 g = string_cat(g, US" DMARC");
964 #ifndef DISABLE_DNSSEC
965 g = string_cat(g, US" DNSSEC");
967 #ifndef DISABLE_EVENT
968 g = string_cat(g, US" Event");
971 g = string_cat(g, US" I18N");
974 g = string_cat(g, US" OCSP");
976 #ifndef DISABLE_PIPE_CONNECT
977 g = string_cat(g, US" PIPE_CONNECT");
980 g = string_cat(g, US" PRDR");
983 g = string_cat(g, US" PROXY");
985 #ifndef DISABLE_QUEUE_RAMP
986 g = string_cat(g, US" Experimental_Queue_Ramp");
989 g = string_cat(g, US" SOCKS");
992 g = string_cat(g, US" SPF");
994 #if defined(SUPPORT_SRS)
995 g = string_cat(g, US" SRS");
999 if (f.tcp_fastopen_ok) g = string_cat(g, US" TCP_Fast_Open");
1001 #ifdef EXPERIMENTAL_ARC
1002 g = string_cat(g, US" Experimental_ARC");
1004 #ifdef EXPERIMENTAL_BRIGHTMAIL
1005 g = string_cat(g, US" Experimental_Brightmail");
1007 #ifdef EXPERIMENTAL_DCC
1008 g = string_cat(g, US" Experimental_DCC");
1010 #ifdef EXPERIMENTAL_DSN_INFO
1011 g = string_cat(g, US" Experimental_DSN_info");
1013 #ifdef EXPERIMENTAL_ESMTP_LIMITS
1014 g = string_cat(g, US" Experimental_ESMTP_Limits");
1016 #ifdef EXPERIMENTAL_QUEUEFILE
1017 g = string_cat(g, US" Experimental_QUEUEFILE");
1019 #if defined(EXPERIMENTAL_SRS_ALT)
1020 g = string_cat(g, US" Experimental_SRS");
1022 g = string_cat(g, US"\n");
1024 g = string_cat(g, US"Lookups (built-in):");
1025 #if defined(LOOKUP_LSEARCH) && LOOKUP_LSEARCH!=2
1026 g = string_cat(g, US" lsearch wildlsearch nwildlsearch iplsearch");
1028 #if defined(LOOKUP_CDB) && LOOKUP_CDB!=2
1029 g = string_cat(g, US" cdb");
1031 #if defined(LOOKUP_DBM) && LOOKUP_DBM!=2
1032 g = string_cat(g, US" dbm dbmjz dbmnz");
1034 #if defined(LOOKUP_DNSDB) && LOOKUP_DNSDB!=2
1035 g = string_cat(g, US" dnsdb");
1037 #if defined(LOOKUP_DSEARCH) && LOOKUP_DSEARCH!=2
1038 g = string_cat(g, US" dsearch");
1040 #if defined(LOOKUP_IBASE) && LOOKUP_IBASE!=2
1041 g = string_cat(g, US" ibase");
1043 #if defined(LOOKUP_JSON) && LOOKUP_JSON!=2
1044 g = string_cat(g, US" json");
1046 #if defined(LOOKUP_LDAP) && LOOKUP_LDAP!=2
1047 g = string_cat(g, US" ldap ldapdn ldapm");
1050 g = string_cat(g, US" lmdb");
1052 #if defined(LOOKUP_MYSQL) && LOOKUP_MYSQL!=2
1053 g = string_cat(g, US" mysql");
1055 #if defined(LOOKUP_NIS) && LOOKUP_NIS!=2
1056 g = string_cat(g, US" nis nis0");
1058 #if defined(LOOKUP_NISPLUS) && LOOKUP_NISPLUS!=2
1059 g = string_cat(g, US" nisplus");
1061 #if defined(LOOKUP_ORACLE) && LOOKUP_ORACLE!=2
1062 g = string_cat(g, US" oracle");
1064 #if defined(LOOKUP_PASSWD) && LOOKUP_PASSWD!=2
1065 g = string_cat(g, US" passwd");
1067 #if defined(LOOKUP_PGSQL) && LOOKUP_PGSQL!=2
1068 g = string_cat(g, US" pgsql");
1070 #if defined(LOOKUP_REDIS) && LOOKUP_REDIS!=2
1071 g = string_cat(g, US" redis");
1073 #if defined(LOOKUP_SQLITE) && LOOKUP_SQLITE!=2
1074 g = string_cat(g, US" sqlite");
1076 #if defined(LOOKUP_TESTDB) && LOOKUP_TESTDB!=2
1077 g = string_cat(g, US" testdb");
1079 #if defined(LOOKUP_WHOSON) && LOOKUP_WHOSON!=2
1080 g = string_cat(g, US" whoson");
1082 g = string_cat(g, US"\n");
1084 g = auth_show_supported(g);
1085 g = route_show_supported(g);
1086 g = transport_show_supported(g);
1088 #ifdef WITH_CONTENT_SCAN
1089 g = malware_show_supported(g);
1092 if (fixed_never_users[0] > 0)
1095 g = string_cat(g, US"Fixed never_users: ");
1096 for (i = 1; i <= (int)fixed_never_users[0] - 1; i++)
1097 string_fmt_append(g, "%u:", (unsigned)fixed_never_users[i]);
1098 g = string_fmt_append(g, "%u\n", (unsigned)fixed_never_users[i]);
1101 g = string_fmt_append(g, "Configure owner: %d:%d\n", config_uid, config_gid);
1102 fputs(CS string_from_gstring(g), fp);
1104 fprintf(fp, "Size of off_t: " SIZE_T_FMT "\n", sizeof(off_t));
1106 /* Everything else is details which are only worth reporting when debugging.
1107 Perhaps the tls_version_report should move into this too. */
1110 /* clang defines __GNUC__ (at least, for me) so test for it first */
1111 #if defined(__clang__)
1112 fprintf(fp, "Compiler: CLang [%s]\n", __clang_version__);
1113 #elif defined(__GNUC__)
1114 fprintf(fp, "Compiler: GCC [%s]\n",
1118 "? unknown version ?"
1122 fprintf(fp, "Compiler: <unknown>\n");
1125 #if defined(__GLIBC__) && !defined(__UCLIBC__)
1126 fprintf(fp, "Library version: Glibc: Compile: %d.%d\n",
1127 __GLIBC__, __GLIBC_MINOR__);
1128 if (__GLIBC_PREREQ(2, 1))
1129 fprintf(fp, " Runtime: %s\n",
1130 gnu_get_libc_version());
1133 show_db_version(fp);
1136 tls_version_report(fp);
1139 utf8_version_report(fp);
1141 #ifdef SUPPORT_DMARC
1142 dmarc_version_report(fp);
1145 spf_lib_version_report(fp);
1148 for (auth_info * authi = auths_available; *authi->driver_name != '\0'; ++authi)
1149 if (authi->version_report)
1150 (*authi->version_report)(fp);
1152 /* PCRE_PRERELEASE is either defined and empty or a bare sequence of
1153 characters; unless it's an ancient version of PCRE in which case it
1155 #ifndef PCRE_PRERELEASE
1156 # define PCRE_PRERELEASE
1159 #define EXPAND_AND_QUOTE(X) QUOTE(X)
1160 fprintf(fp, "Library version: PCRE: Compile: %d.%d%s\n"
1162 PCRE_MAJOR, PCRE_MINOR,
1163 EXPAND_AND_QUOTE(PCRE_PRERELEASE) "",
1166 #undef EXPAND_AND_QUOTE
1169 for (int i = 0; i < lookup_list_count; i++)
1170 if (lookup_list[i]->version_report)
1171 lookup_list[i]->version_report(fp);
1173 #ifdef WHITELIST_D_MACROS
1174 fprintf(fp, "WHITELIST_D_MACROS: \"%s\"\n", WHITELIST_D_MACROS);
1176 fprintf(fp, "WHITELIST_D_MACROS unset\n");
1178 #ifdef TRUSTED_CONFIG_LIST
1179 fprintf(fp, "TRUSTED_CONFIG_LIST: \"%s\"\n", TRUSTED_CONFIG_LIST);
1181 fprintf(fp, "TRUSTED_CONFIG_LIST unset\n");
1185 store_reset(reset_point);
1189 /*************************************************
1190 * Show auxiliary information about Exim *
1191 *************************************************/
1194 show_exim_information(enum commandline_info request, FILE *stream)
1199 fprintf(stream, "Oops, something went wrong.\n");
1203 "The -bI: flag takes a string indicating which information to provide.\n"
1204 "If the string is not recognised, you'll get this help (on stderr).\n"
1206 " exim -bI:help this information\n"
1207 " exim -bI:dscp list of known dscp value keywords\n"
1208 " exim -bI:sieve list of supported sieve extensions\n"
1212 for (const uschar ** pp = exim_sieve_extension_list; *pp; ++pp)
1213 fprintf(stream, "%s\n", *pp);
1216 dscp_list_to_stream(stream);
1222 /*************************************************
1223 * Quote a local part *
1224 *************************************************/
1226 /* This function is used when a sender address or a From: or Sender: header
1227 line is being created from the caller's login, or from an authenticated_id. It
1228 applies appropriate quoting rules for a local part.
1230 Argument: the local part
1231 Returns: the local part, quoted if necessary
1235 local_part_quote(uschar *lpart)
1237 BOOL needs_quote = FALSE;
1240 for (uschar * t = lpart; !needs_quote && *t != 0; t++)
1242 needs_quote = !isalnum(*t) && strchr("!#$%&'*+-/=?^_`{|}~", *t) == NULL &&
1243 (*t != '.' || t == lpart || t[1] == 0);
1246 if (!needs_quote) return lpart;
1248 g = string_catn(NULL, US"\"", 1);
1252 uschar *nq = US Ustrpbrk(lpart, "\\\"");
1255 g = string_cat(g, lpart);
1258 g = string_catn(g, lpart, nq - lpart);
1259 g = string_catn(g, US"\\", 1);
1260 g = string_catn(g, nq, 1);
1264 g = string_catn(g, US"\"", 1);
1265 return string_from_gstring(g);
1271 /*************************************************
1272 * Load readline() functions *
1273 *************************************************/
1275 /* This function is called from testing executions that read data from stdin,
1276 but only when running as the calling user. Currently, only -be does this. The
1277 function loads the readline() function library and passes back the functions.
1278 On some systems, it needs the curses library, so load that too, but try without
1279 it if loading fails. All this functionality has to be requested at build time.
1282 fn_readline_ptr pointer to where to put the readline pointer
1283 fn_addhist_ptr pointer to where to put the addhistory function
1285 Returns: the dlopen handle or NULL on failure
1289 set_readline(char * (**fn_readline_ptr)(const char *),
1290 void (**fn_addhist_ptr)(const char *))
1293 void *dlhandle_curses = dlopen("libcurses." DYNLIB_FN_EXT, RTLD_GLOBAL|RTLD_LAZY);
1295 dlhandle = dlopen("libreadline." DYNLIB_FN_EXT, RTLD_GLOBAL|RTLD_NOW);
1296 if (dlhandle_curses) dlclose(dlhandle_curses);
1300 /* Checked manual pages; at least in GNU Readline 6.1, the prototypes are:
1301 * char * readline (const char *prompt);
1302 * void add_history (const char *string);
1304 *fn_readline_ptr = (char *(*)(const char*))dlsym(dlhandle, "readline");
1305 *fn_addhist_ptr = (void(*)(const char*))dlsym(dlhandle, "add_history");
1308 DEBUG(D_any) debug_printf("failed to load readline: %s\n", dlerror());
1316 /*************************************************
1317 * Get a line from stdin for testing things *
1318 *************************************************/
1320 /* This function is called when running tests that can take a number of lines
1321 of input (for example, -be and -bt). It handles continuations and trailing
1322 spaces. And prompting and a blank line output on eof. If readline() is in use,
1323 the arguments are non-NULL and provide the relevant functions.
1326 fn_readline readline function or NULL
1327 fn_addhist addhist function or NULL
1329 Returns: pointer to dynamic memory, or NULL at end of file
1333 get_stdinput(char *(*fn_readline)(const char *), void(*fn_addhist)(const char *))
1337 if (!fn_readline) { printf("> "); fflush(stdout); }
1339 for (int i = 0;; i++)
1341 uschar buffer[1024];
1345 char *readline_line = NULL;
1348 if (!(readline_line = fn_readline((i > 0)? "":"> "))) break;
1349 if (*readline_line != 0 && fn_addhist) fn_addhist(readline_line);
1350 p = US readline_line;
1355 /* readline() not in use */
1358 if (Ufgets(buffer, sizeof(buffer), stdin) == NULL) break;
1362 /* Handle the line */
1364 ss = p + (int)Ustrlen(p);
1365 while (ss > p && isspace(ss[-1])) ss--;
1368 while (p < ss && isspace(*p)) p++; /* leading space after cont */
1370 g = string_catn(g, p, ss - p);
1373 if (fn_readline) free(readline_line);
1376 /* g can only be NULL if ss==p */
1377 if (ss == p || g->s[g->ptr-1] != '\\')
1381 (void) string_from_gstring(g);
1384 if (!g) printf("\n");
1385 return string_from_gstring(g);
1390 /*************************************************
1391 * Output usage information for the program *
1392 *************************************************/
1394 /* This function is called when there are no recipients
1395 or a specific --help argument was added.
1398 progname information on what name we were called by
1400 Returns: DOES NOT RETURN
1404 exim_usage(uschar *progname)
1407 /* Handle specific program invocation variants */
1408 if (Ustrcmp(progname, US"-mailq") == 0)
1410 "mailq - list the contents of the mail queue\n\n"
1411 "For a list of options, see the Exim documentation.\n");
1413 /* Generic usage - we output this whatever happens */
1415 "Exim is a Mail Transfer Agent. It is normally called by Mail User Agents,\n"
1416 "not directly from a shell command line. Options and/or arguments control\n"
1417 "what it does when called. For a list of options, see the Exim documentation.\n");
1422 /*************************************************
1423 * Validate that the macros given are okay *
1424 *************************************************/
1426 /* Typically, Exim will drop privileges if macros are supplied. In some
1427 cases, we want to not do so.
1429 Arguments: opt_D_used - true if the commandline had a "-D" option
1430 Returns: true if trusted, false otherwise
1434 macros_trusted(BOOL opt_D_used)
1436 #ifdef WHITELIST_D_MACROS
1437 uschar *whitelisted, *end, *p, **whites;
1438 int white_count, i, n;
1440 BOOL prev_char_item, found;
1445 #ifndef WHITELIST_D_MACROS
1449 /* We only trust -D overrides for some invoking users:
1450 root, the exim run-time user, the optional config owner user.
1451 I don't know why config-owner would be needed, but since they can own the
1452 config files anyway, there's no security risk to letting them override -D. */
1453 if ( ! ((real_uid == root_uid)
1454 || (real_uid == exim_uid)
1455 #ifdef CONFIGURE_OWNER
1456 || (real_uid == config_uid)
1460 debug_printf("macros_trusted rejecting macros for uid %d\n", (int) real_uid);
1464 /* Get a list of macros which are whitelisted */
1465 whitelisted = string_copy_perm(US WHITELIST_D_MACROS, FALSE);
1466 prev_char_item = FALSE;
1468 for (p = whitelisted; *p != '\0'; ++p)
1470 if (*p == ':' || isspace(*p))
1475 prev_char_item = FALSE;
1478 if (!prev_char_item)
1479 prev_char_item = TRUE;
1486 whites = store_malloc(sizeof(uschar *) * (white_count+1));
1487 for (p = whitelisted, i = 0; (p != end) && (i < white_count); ++p)
1492 if (i == white_count)
1494 while (*p != '\0' && p < end)
1500 /* The list of commandline macros should be very short.
1501 Accept the N*M complexity. */
1502 for (macro_item * m = macros_user; m; m = m->next) if (m->command_line)
1505 for (uschar ** w = whites; *w; ++w)
1506 if (Ustrcmp(*w, m->name) == 0)
1513 if (!m->replacement)
1515 if ((len = m->replen) == 0)
1517 n = pcre_exec(regex_whitelisted_macro, NULL, CS m->replacement, len,
1518 0, PCRE_EOPT, NULL, 0);
1521 if (n != PCRE_ERROR_NOMATCH)
1522 debug_printf("macros_trusted checking %s returned %d\n", m->name, n);
1526 DEBUG(D_any) debug_printf("macros_trusted overridden to true by whitelisting\n");
1532 /*************************************************
1533 * Expansion testing *
1534 *************************************************/
1536 /* Expand and print one item, doing macro-processing.
1539 item line for expansion
1543 expansion_test_line(uschar * line)
1548 Ustrncpy(big_buffer, line, big_buffer_size);
1549 big_buffer[big_buffer_size-1] = '\0';
1550 len = Ustrlen(big_buffer);
1552 (void) macros_expand(0, &len, &dummy_macexp);
1554 if (isupper(big_buffer[0]))
1556 if (macro_read_assignment(big_buffer))
1557 printf("Defined macro '%s'\n", mlast->name);
1560 if ((line = expand_string(big_buffer))) printf("%s\n", CS line);
1561 else printf("Failed: %s\n", expand_string_message);
1566 /*************************************************
1567 * Entry point and high-level code *
1568 *************************************************/
1570 /* Entry point for the Exim mailer. Analyse the arguments and arrange to take
1571 the appropriate action. All the necessary functions are present in the one
1572 binary. I originally thought one should split it up, but it turns out that so
1573 much of the apparatus is needed in each chunk that one might as well just have
1574 it all available all the time, which then makes the coding easier as well.
1577 argc count of entries in argv
1578 argv argument strings, with argv[0] being the program name
1580 Returns: EXIT_SUCCESS if terminated successfully
1581 EXIT_FAILURE otherwise, except when a message has been sent
1582 to the sender, and -oee was given
1586 main(int argc, char **cargv)
1588 uschar **argv = USS cargv;
1589 int arg_receive_timeout = -1;
1590 int arg_smtp_receive_timeout = -1;
1591 int arg_error_handling = error_handling;
1592 int filter_sfd = -1;
1593 int filter_ufd = -1;
1596 int list_queue_option = 0;
1598 int msg_action_arg = -1;
1599 int namelen = (argv[0] == NULL)? 0 : Ustrlen(argv[0]);
1600 int queue_only_reason = 0;
1602 int perl_start_option = 0;
1604 int recipients_arg = argc;
1605 int sender_address_domain = 0;
1606 int test_retry_arg = -1;
1607 int test_rewrite_arg = -1;
1608 gid_t original_egid;
1609 BOOL arg_queue_only = FALSE;
1610 BOOL bi_option = FALSE;
1611 BOOL checking = FALSE;
1612 BOOL count_queue = FALSE;
1613 BOOL expansion_test = FALSE;
1614 BOOL extract_recipients = FALSE;
1615 BOOL flag_G = FALSE;
1616 BOOL flag_n = FALSE;
1617 BOOL forced_delivery = FALSE;
1618 BOOL f_end_dot = FALSE;
1619 BOOL deliver_give_up = FALSE;
1620 BOOL list_queue = FALSE;
1621 BOOL list_options = FALSE;
1622 BOOL list_config = FALSE;
1623 BOOL local_queue_only;
1625 BOOL one_msg_action = FALSE;
1626 BOOL opt_D_used = FALSE;
1627 BOOL queue_only_set = FALSE;
1628 BOOL receiving_message = TRUE;
1629 BOOL sender_ident_set = FALSE;
1630 BOOL session_local_queue_only;
1632 BOOL removed_privilege = FALSE;
1633 BOOL usage_wanted = FALSE;
1634 BOOL verify_address_mode = FALSE;
1635 BOOL verify_as_sender = FALSE;
1636 BOOL rcpt_verify_quota = FALSE;
1637 BOOL version_printed = FALSE;
1638 uschar *alias_arg = NULL;
1639 uschar *called_as = US"";
1640 uschar *cmdline_syslog_name = NULL;
1641 uschar *start_queue_run_id = NULL;
1642 uschar *stop_queue_run_id = NULL;
1643 uschar *expansion_test_message = NULL;
1644 uschar *ftest_domain = NULL;
1645 uschar *ftest_localpart = NULL;
1646 uschar *ftest_prefix = NULL;
1647 uschar *ftest_suffix = NULL;
1648 uschar *log_oneline = NULL;
1649 uschar *malware_test_file = NULL;
1650 uschar *real_sender_address;
1651 uschar *originator_home = US"/";
1655 struct stat statbuf;
1656 pid_t passed_qr_pid = (pid_t)0;
1657 int passed_qr_pipe = -1;
1658 gid_t group_list[EXIM_GROUPLIST_SIZE];
1660 /* For the -bI: flag */
1661 enum commandline_info info_flag = CMDINFO_NONE;
1662 BOOL info_stdout = FALSE;
1664 /* Possible options for -R and -S */
1666 static uschar *rsopts[] = { US"f", US"ff", US"r", US"rf", US"rff" };
1668 /* Need to define this in case we need to change the environment in order
1669 to get rid of a bogus time zone. We have to make it char rather than uschar
1670 because some OS define it in /usr/include/unistd.h. */
1672 extern char **environ;
1674 #ifdef MEASURE_TIMING
1675 (void)gettimeofday(×tamp_startup, NULL);
1678 store_init(); /* Initialise the memory allocation susbsystem */
1680 /* If the Exim user and/or group and/or the configuration file owner/group were
1681 defined by ref:name at build time, we must now find the actual uid/gid values.
1682 This is a feature to make the lives of binary distributors easier. */
1684 #ifdef EXIM_USERNAME
1685 if (route_finduser(US EXIM_USERNAME, &pw, &exim_uid))
1688 exim_fail("exim: refusing to run with uid 0 for \"%s\"\n", EXIM_USERNAME);
1690 /* If ref:name uses a number as the name, route_finduser() returns
1691 TRUE with exim_uid set and pw coerced to NULL. */
1693 exim_gid = pw->pw_gid;
1694 #ifndef EXIM_GROUPNAME
1697 "exim: ref:name should specify a usercode, not a group.\n"
1698 "exim: can't let you get away with it unless you also specify a group.\n");
1702 exim_fail("exim: failed to find uid for user name \"%s\"\n", EXIM_USERNAME);
1705 #ifdef EXIM_GROUPNAME
1706 if (!route_findgroup(US EXIM_GROUPNAME, &exim_gid))
1707 exim_fail("exim: failed to find gid for group name \"%s\"\n", EXIM_GROUPNAME);
1710 #ifdef CONFIGURE_OWNERNAME
1711 if (!route_finduser(US CONFIGURE_OWNERNAME, NULL, &config_uid))
1712 exim_fail("exim: failed to find uid for user name \"%s\"\n",
1713 CONFIGURE_OWNERNAME);
1716 /* We default the system_filter_user to be the Exim run-time user, as a
1717 sane non-root value. */
1718 system_filter_uid = exim_uid;
1720 #ifdef CONFIGURE_GROUPNAME
1721 if (!route_findgroup(US CONFIGURE_GROUPNAME, &config_gid))
1722 exim_fail("exim: failed to find gid for group name \"%s\"\n",
1723 CONFIGURE_GROUPNAME);
1726 /* In the Cygwin environment, some initialization used to need doing.
1727 It was fudged in by means of this macro; now no longer but we'll leave
1728 it in case of others. */
1734 /* Check a field which is patched when we are running Exim within its
1735 testing harness; do a fast initial check, and then the whole thing. */
1737 f.running_in_test_harness =
1738 *running_status == '<' && Ustrcmp(running_status, "<<<testing>>>") == 0;
1739 if (f.running_in_test_harness)
1742 /* The C standard says that the equivalent of setlocale(LC_ALL, "C") is obeyed
1743 at the start of a program; however, it seems that some environments do not
1744 follow this. A "strange" locale can affect the formatting of timestamps, so we
1747 setlocale(LC_ALL, "C");
1749 /* Get the offset between CLOCK_MONOTONIC/CLOCK_BOOTTIME and wallclock */
1751 #ifdef _POSIX_MONOTONIC_CLOCK
1755 /* Set up the default handler for timing using alarm(). */
1757 os_non_restarting_signal(SIGALRM, sigalrm_handler);
1759 /* Ensure we have a buffer for constructing log entries. Use malloc directly,
1760 because store_malloc writes a log entry on failure. */
1762 if (!(log_buffer = US malloc(LOG_BUFFER_SIZE)))
1763 exim_fail("exim: failed to get store for log buffer\n");
1765 /* Initialize the default log options. */
1767 bits_set(log_selector, log_selector_size, log_default);
1769 /* Set log_stderr to stderr, provided that stderr exists. This gets reset to
1770 NULL when the daemon is run and the file is closed. We have to use this
1771 indirection, because some systems don't allow writing to the variable "stderr".
1774 if (fstat(fileno(stderr), &statbuf) >= 0) log_stderr = stderr;
1776 /* Arrange for the PCRE regex library to use our store functions. Note that
1777 the normal calls are actually macros that add additional arguments for
1778 debugging purposes so we have to assign specially constructed functions here.
1779 The default is to use store in the stacking pool, but this is overridden in the
1780 regex_must_compile() function. */
1782 pcre_malloc = function_store_get;
1783 pcre_free = function_dummy_free;
1785 /* Ensure there is a big buffer for temporary use in several places. It is put
1786 in malloc store so that it can be freed for enlargement if necessary. */
1788 big_buffer = store_malloc(big_buffer_size);
1790 /* Set up the handler for the data request signal, and set the initial
1791 descriptive text. */
1793 process_info = store_get(PROCESS_INFO_SIZE, TRUE); /* tainted */
1794 set_process_info("initializing");
1795 os_restarting_signal(SIGUSR1, usr1_handler);
1797 /* If running in a dockerized environment, the TERM signal is only
1798 delegated to the PID 1 if we request it by setting an signal handler */
1799 if (getpid() == 1) signal(SIGTERM, term_handler);
1801 /* SIGHUP is used to get the daemon to reconfigure. It gets set as appropriate
1802 in the daemon code. For the rest of Exim's uses, we ignore it. */
1804 signal(SIGHUP, SIG_IGN);
1806 /* We don't want to die on pipe errors as the code is written to handle
1807 the write error instead. */
1809 signal(SIGPIPE, SIG_IGN);
1811 /* Under some circumstance on some OS, Exim can get called with SIGCHLD
1812 set to SIG_IGN. This causes subprocesses that complete before the parent
1813 process waits for them not to hang around, so when Exim calls wait(), nothing
1814 is there. The wait() code has been made robust against this, but let's ensure
1815 that SIGCHLD is set to SIG_DFL, because it's tidier to wait and get a process
1816 ending status. We use sigaction rather than plain signal() on those OS where
1817 SA_NOCLDWAIT exists, because we want to be sure it is turned off. (There was a
1818 problem on AIX with this.) */
1822 struct sigaction act;
1823 act.sa_handler = SIG_DFL;
1824 sigemptyset(&(act.sa_mask));
1826 sigaction(SIGCHLD, &act, NULL);
1829 signal(SIGCHLD, SIG_DFL);
1832 /* Save the arguments for use if we re-exec exim as a daemon after receiving
1837 /* Set up the version number. Set up the leading 'E' for the external form of
1838 message ids, set the pointer to the internal form, and initialize it to
1839 indicate no message being processed. */
1842 message_id_option[0] = '-';
1843 message_id_external = message_id_option + 1;
1844 message_id_external[0] = 'E';
1845 message_id = message_id_external + 1;
1848 /* Set the umask to zero so that any files Exim creates using open() are
1849 created with the modes that it specifies. NOTE: Files created with fopen() have
1850 a problem, which was not recognized till rather late (February 2006). With this
1851 umask, such files will be world writeable. (They are all content scanning files
1852 in the spool directory, which isn't world-accessible, so this is not a
1853 disaster, but it's untidy.) I don't want to change this overall setting,
1854 however, because it will interact badly with the open() calls. Instead, there's
1855 now a function called modefopen() that fiddles with the umask while calling
1860 /* Precompile the regular expression for matching a message id. Keep this in
1861 step with the code that generates ids in the accept.c module. We need to do
1862 this here, because the -M options check their arguments for syntactic validity
1863 using mac_ismsgid, which uses this. */
1866 regex_must_compile(US"^(?:[^\\W_]{6}-){2}[^\\W_]{2}$", FALSE, TRUE);
1868 /* Precompile the regular expression that is used for matching an SMTP error
1869 code, possibly extended, at the start of an error message. Note that the
1870 terminating whitespace character is included. */
1873 regex_must_compile(US"^\\d\\d\\d\\s(?:\\d\\.\\d\\d?\\d?\\.\\d\\d?\\d?\\s)?",
1876 #ifdef WHITELIST_D_MACROS
1877 /* Precompile the regular expression used to filter the content of macros
1878 given to -D for permissibility. */
1880 regex_whitelisted_macro =
1881 regex_must_compile(US"^[A-Za-z0-9_/.-]*$", FALSE, TRUE);
1884 for (i = 0; i < REGEX_VARS; i++) regex_vars[i] = NULL;
1886 /* If the program is called as "mailq" treat it as equivalent to "exim -bp";
1887 this seems to be a generally accepted convention, since one finds symbolic
1888 links called "mailq" in standard OS configurations. */
1890 if ((namelen == 5 && Ustrcmp(argv[0], "mailq") == 0) ||
1891 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/mailq", 6) == 0))
1894 receiving_message = FALSE;
1895 called_as = US"-mailq";
1898 /* If the program is called as "rmail" treat it as equivalent to
1899 "exim -i -oee", thus allowing UUCP messages to be input using non-SMTP mode,
1900 i.e. preventing a single dot on a line from terminating the message, and
1901 returning with zero return code, even in cases of error (provided an error
1902 message has been sent). */
1904 if ((namelen == 5 && Ustrcmp(argv[0], "rmail") == 0) ||
1905 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/rmail", 6) == 0))
1908 called_as = US"-rmail";
1909 errors_sender_rc = EXIT_SUCCESS;
1912 /* If the program is called as "rsmtp" treat it as equivalent to "exim -bS";
1913 this is a smail convention. */
1915 if ((namelen == 5 && Ustrcmp(argv[0], "rsmtp") == 0) ||
1916 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/rsmtp", 6) == 0))
1918 smtp_input = smtp_batched_input = TRUE;
1919 called_as = US"-rsmtp";
1922 /* If the program is called as "runq" treat it as equivalent to "exim -q";
1923 this is a smail convention. */
1925 if ((namelen == 4 && Ustrcmp(argv[0], "runq") == 0) ||
1926 (namelen > 4 && Ustrncmp(argv[0] + namelen - 5, "/runq", 5) == 0))
1929 receiving_message = FALSE;
1930 called_as = US"-runq";
1933 /* If the program is called as "newaliases" treat it as equivalent to
1934 "exim -bi"; this is a sendmail convention. */
1936 if ((namelen == 10 && Ustrcmp(argv[0], "newaliases") == 0) ||
1937 (namelen > 10 && Ustrncmp(argv[0] + namelen - 11, "/newaliases", 11) == 0))
1940 receiving_message = FALSE;
1941 called_as = US"-newaliases";
1944 /* Save the original effective uid for a couple of uses later. It should
1945 normally be root, but in some esoteric environments it may not be. */
1947 original_euid = geteuid();
1948 original_egid = getegid();
1950 /* Get the real uid and gid. If the caller is root, force the effective uid/gid
1951 to be the same as the real ones. This makes a difference only if Exim is setuid
1952 (or setgid) to something other than root, which could be the case in some
1953 special configurations. */
1955 real_uid = getuid();
1956 real_gid = getgid();
1958 if (real_uid == root_uid)
1960 if ((rv = setgid(real_gid)))
1961 exim_fail("exim: setgid(%ld) failed: %s\n",
1962 (long int)real_gid, strerror(errno));
1963 if ((rv = setuid(real_uid)))
1964 exim_fail("exim: setuid(%ld) failed: %s\n",
1965 (long int)real_uid, strerror(errno));
1968 /* If neither the original real uid nor the original euid was root, Exim is
1969 running in an unprivileged state. */
1971 unprivileged = (real_uid != root_uid && original_euid != root_uid);
1973 /* For most of the args-parsing we need to use permanent pool memory */
1975 int old_pool = store_pool;
1976 store_pool = POOL_PERM;
1978 /* Scan the program's arguments. Some can be dealt with right away; others are
1979 simply recorded for checking and handling afterwards. Do a high-level switch
1980 on the second character (the one after '-'), to save some effort. */
1982 for (i = 1; i < argc; i++)
1984 BOOL badarg = FALSE;
1985 uschar * arg = argv[i];
1989 /* An argument not starting with '-' is the start of a recipients list;
1990 break out of the options-scanning loop. */
1998 /* An option consisting of -- terminates the options */
2000 if (Ustrcmp(arg, "--") == 0)
2002 recipients_arg = i + 1;
2006 /* Handle flagged options */
2008 switchchar = arg[1];
2011 /* Make all -ex options synonymous with -oex arguments, since that
2012 is assumed by various callers. Also make -qR options synonymous with -R
2013 options, as that seems to be required as well. Allow for -qqR too, and
2014 the same for -S options. */
2016 if (Ustrncmp(arg+1, "oe", 2) == 0 ||
2017 Ustrncmp(arg+1, "qR", 2) == 0 ||
2018 Ustrncmp(arg+1, "qS", 2) == 0)
2020 switchchar = arg[2];
2023 else if (Ustrncmp(arg+1, "qqR", 3) == 0 || Ustrncmp(arg+1, "qqS", 3) == 0)
2025 switchchar = arg[3];
2027 f.queue_2stage = TRUE;
2030 /* Make -r synonymous with -f, since it is a documented alias */
2032 else if (arg[1] == 'r') switchchar = 'f';
2034 /* Make -ov synonymous with -v */
2036 else if (Ustrcmp(arg, "-ov") == 0)
2042 /* deal with --option_aliases */
2043 else if (switchchar == '-')
2045 if (Ustrcmp(argrest, "help") == 0)
2047 usage_wanted = TRUE;
2050 else if (Ustrcmp(argrest, "version") == 0)
2057 /* High-level switch on active initial letter */
2062 /* sendmail uses -Ac and -Am to control which .cf file is used;
2065 if (!*argrest) { badarg = TRUE; break; }
2068 BOOL ignore = FALSE;
2073 if (*(argrest + 1) == '\0')
2077 if (!ignore) badarg = TRUE;
2081 /* -Btype is a sendmail option for 7bit/8bit setting. Exim is 8-bit clean
2082 so has no need of it. */
2085 if (!*argrest) i++; /* Skip over the type */
2091 receiving_message = FALSE; /* Reset TRUE for -bm, -bS, -bs below */
2095 /* -bd: Run in daemon mode, awaiting SMTP connections.
2096 -bdf: Ditto, but in the foreground.
2099 f.daemon_listen = TRUE;
2100 if (*argrest == 'f') f.background_daemon = FALSE;
2101 else if (*argrest) badarg = TRUE;
2104 /* -be: Run in expansion test mode
2105 -bem: Ditto, but read a message from a file first
2108 expansion_test = checking = TRUE;
2109 if (*argrest == 'm')
2111 if (++i >= argc) { badarg = TRUE; break; }
2112 expansion_test_message = argv[i];
2115 if (*argrest) badarg = TRUE;
2118 /* -bF: Run system filter test */
2120 filter_test |= checking = FTEST_SYSTEM;
2121 if (*argrest) badarg = TRUE;
2122 else if (++i < argc) filter_test_sfile = argv[i];
2123 else exim_fail("exim: file name expected after %s\n", argv[i-1]);
2126 /* -bf: Run user filter test
2127 -bfd: Set domain for filter testing
2128 -bfl: Set local part for filter testing
2129 -bfp: Set prefix for filter testing
2130 -bfs: Set suffix for filter testing
2135 filter_test |= checking = FTEST_USER;
2136 if (++i < argc) filter_test_ufile = argv[i];
2137 else exim_fail("exim: file name expected after %s\n", argv[i-1]);
2142 exim_fail("exim: string expected after %s\n", arg);
2143 if (Ustrcmp(argrest, "d") == 0) ftest_domain = argv[i];
2144 else if (Ustrcmp(argrest, "l") == 0) ftest_localpart = argv[i];
2145 else if (Ustrcmp(argrest, "p") == 0) ftest_prefix = argv[i];
2146 else if (Ustrcmp(argrest, "s") == 0) ftest_suffix = argv[i];
2151 /* -bh: Host checking - an IP address must follow. */
2153 if (!*argrest || Ustrcmp(argrest, "c") == 0)
2155 if (++i >= argc) { badarg = TRUE; break; }
2156 sender_host_address = string_copy_taint(argv[i], TRUE);
2157 host_checking = checking = f.log_testing_mode = TRUE;
2158 f.host_checking_callout = *argrest == 'c';
2159 message_logs = FALSE;
2164 /* -bi: This option is used by sendmail to initialize *the* alias file,
2165 though it has the -oA option to specify a different file. Exim has no
2166 concept of *the* alias file, but since Sun's YP make script calls
2167 sendmail this way, some support must be provided. */
2169 if (!*argrest) bi_option = TRUE;
2173 /* -bI: provide information, of the type to follow after a colon.
2174 This is an Exim flag. */
2176 if (Ustrlen(argrest) >= 1 && *argrest == ':')
2178 uschar *p = argrest+1;
2179 info_flag = CMDINFO_HELP;
2181 if (strcmpic(p, CUS"sieve") == 0)
2183 info_flag = CMDINFO_SIEVE;
2186 else if (strcmpic(p, CUS"dscp") == 0)
2188 info_flag = CMDINFO_DSCP;
2191 else if (strcmpic(p, CUS"help") == 0)
2197 /* -bm: Accept and deliver message - the default option. Reinstate
2198 receiving_message, which got turned off for all -b options.
2199 -bmalware: test the filename given for malware */
2201 if (!*argrest) receiving_message = TRUE;
2202 else if (Ustrcmp(argrest, "alware") == 0)
2204 if (++i >= argc) { badarg = TRUE; break; }
2206 malware_test_file = argv[i];
2211 /* -bnq: For locally originating messages, do not qualify unqualified
2212 addresses. In the envelope, this causes errors; in header lines they
2215 if (Ustrcmp(argrest, "q") == 0)
2217 f.allow_unqualified_sender = FALSE;
2218 f.allow_unqualified_recipient = FALSE;
2223 /* -bpxx: List the contents of the mail queue, in various forms. If
2224 the option is -bpc, just a queue count is needed. Otherwise, if the
2225 first letter after p is r, then order is random. */
2227 if (*argrest == 'c')
2230 if (*++argrest) badarg = TRUE;
2234 if (*argrest == 'r')
2236 list_queue_option = 8;
2239 else list_queue_option = 0;
2243 /* -bp: List the contents of the mail queue, top-level only */
2247 /* -bpu: List the contents of the mail queue, top-level undelivered */
2249 else if (Ustrcmp(argrest, "u") == 0) list_queue_option += 1;
2251 /* -bpa: List the contents of the mail queue, including all delivered */
2253 else if (Ustrcmp(argrest, "a") == 0) list_queue_option += 2;
2255 /* Unknown after -bp[r] */
2261 /* -bP: List the configuration variables given as the address list.
2262 Force -v, so configuration errors get displayed. */
2265 /* -bP config: we need to setup here, because later,
2266 when list_options is checked, the config is read already */
2269 else if (argv[i+1] && Ustrcmp(argv[i+1], "config") == 0)
2272 readconf_save_config(version_string);
2276 list_options = TRUE;
2277 debug_selector |= D_v;
2278 debug_file = stderr;
2282 /* -brt: Test retry configuration lookup */
2284 if (Ustrcmp(argrest, "t") == 0)
2287 test_retry_arg = i + 1;
2291 /* -brw: Test rewrite configuration */
2293 else if (Ustrcmp(argrest, "w") == 0)
2296 test_rewrite_arg = i + 1;
2302 /* -bS: Read SMTP commands on standard input, but produce no replies -
2303 all errors are reported by sending messages. */
2306 smtp_input = smtp_batched_input = receiving_message = TRUE;
2310 /* -bs: Read SMTP commands on standard input and produce SMTP replies
2311 on standard output. */
2313 if (!*argrest) smtp_input = receiving_message = TRUE;
2317 /* -bt: address testing mode */
2320 f.address_test_mode = checking = f.log_testing_mode = TRUE;
2324 /* -bv: verify addresses */
2327 verify_address_mode = checking = f.log_testing_mode = TRUE;
2329 /* -bvs: verify sender addresses */
2331 else if (Ustrcmp(argrest, "s") == 0)
2333 verify_address_mode = checking = f.log_testing_mode = TRUE;
2334 verify_as_sender = TRUE;
2339 /* -bV: Print version string and support details */
2343 printf("Exim version %s #%s built %s\n", version_string,
2344 version_cnumber, version_date);
2345 printf("%s\n", CS version_copyright);
2346 version_printed = TRUE;
2347 show_whats_supported(stdout);
2348 f.log_testing_mode = TRUE;
2353 /* -bw: inetd wait mode, accept a listening socket as stdin */
2355 f.inetd_wait_mode = TRUE;
2356 f.background_daemon = FALSE;
2357 f.daemon_listen = TRUE;
2359 if ((inetd_wait_timeout = readconf_readtime(argrest, 0, FALSE)) <= 0)
2360 exim_fail("exim: bad time value %s: abandoned\n", argv[i]);
2371 /* -C: change configuration file list; ignore if it isn't really
2372 a change! Enforce a prefix check if required. */
2376 if (++i < argc) argrest = argv[i]; else { badarg = TRUE; break; }
2377 if (Ustrcmp(config_main_filelist, argrest) != 0)
2379 #ifdef ALT_CONFIG_PREFIX
2381 int len = Ustrlen(ALT_CONFIG_PREFIX);
2382 const uschar *list = argrest;
2384 /* The argv is untainted, so big_buffer (also untainted) is ok to use */
2385 while((filename = string_nextinlist(&list, &sep, big_buffer,
2387 if ( ( Ustrlen(filename) < len
2388 || Ustrncmp(filename, ALT_CONFIG_PREFIX, len) != 0
2389 || Ustrstr(filename, "/../") != NULL
2391 && (Ustrcmp(filename, "/dev/null") != 0 || real_uid != root_uid)
2393 exim_fail("-C Permission denied\n");
2395 if (real_uid != root_uid)
2397 #ifdef TRUSTED_CONFIG_LIST
2399 if (real_uid != exim_uid
2400 #ifdef CONFIGURE_OWNER
2401 && real_uid != config_uid
2404 f.trusted_config = FALSE;
2407 FILE *trust_list = Ufopen(TRUSTED_CONFIG_LIST, "rb");
2410 struct stat statbuf;
2412 if (fstat(fileno(trust_list), &statbuf) != 0 ||
2413 (statbuf.st_uid != root_uid /* owner not root */
2414 #ifdef CONFIGURE_OWNER
2415 && statbuf.st_uid != config_uid /* owner not the special one */
2418 (statbuf.st_gid != root_gid /* group not root */
2419 #ifdef CONFIGURE_GROUP
2420 && statbuf.st_gid != config_gid /* group not the special one */
2422 && (statbuf.st_mode & 020) != 0 /* group writeable */
2424 (statbuf.st_mode & 2) != 0) /* world writeable */
2426 f.trusted_config = FALSE;
2431 /* Well, the trust list at least is up to scratch... */
2433 uschar *trusted_configs[32];
2436 int old_pool = store_pool;
2437 store_pool = POOL_MAIN;
2439 reset_point = store_mark();
2440 while (Ufgets(big_buffer, big_buffer_size, trust_list))
2442 uschar *start = big_buffer, *nl;
2443 while (*start && isspace(*start))
2447 nl = Ustrchr(start, '\n');
2450 trusted_configs[nr_configs++] = string_copy(start);
2451 if (nr_configs == nelem(trusted_configs))
2459 const uschar *list = argrest;
2461 while (f.trusted_config && (filename = string_nextinlist(&list,
2462 &sep, big_buffer, big_buffer_size)))
2464 for (i=0; i < nr_configs; i++)
2465 if (Ustrcmp(filename, trusted_configs[i]) == 0)
2467 if (i == nr_configs)
2469 f.trusted_config = FALSE;
2474 else /* No valid prefixes found in trust_list file. */
2475 f.trusted_config = FALSE;
2476 store_reset(reset_point);
2477 store_pool = old_pool;
2480 else /* Could not open trust_list file. */
2481 f.trusted_config = FALSE;
2484 /* Not root; don't trust config */
2485 f.trusted_config = FALSE;
2489 config_main_filelist = argrest;
2490 f.config_changed = TRUE;
2495 /* -D: set up a macro definition */
2498 #ifdef DISABLE_D_OPTION
2499 exim_fail("exim: -D is not available in this Exim binary\n");
2505 uschar *s = argrest;
2508 while (isspace(*s)) s++;
2510 if (*s < 'A' || *s > 'Z')
2511 exim_fail("exim: macro name set by -D must start with "
2512 "an upper case letter\n");
2514 while (isalnum(*s) || *s == '_')
2516 if (ptr < sizeof(name)-1) name[ptr++] = *s;
2520 if (ptr == 0) { badarg = TRUE; break; }
2521 while (isspace(*s)) s++;
2524 if (*s++ != '=') { badarg = TRUE; break; }
2525 while (isspace(*s)) s++;
2528 for (m = macros_user; m; m = m->next)
2529 if (Ustrcmp(m->name, name) == 0)
2530 exim_fail("exim: duplicated -D in command line\n");
2532 m = macro_create(name, s, TRUE);
2534 if (clmacro_count >= MAX_CLMACROS)
2535 exim_fail("exim: too many -D options on command line\n");
2536 clmacros[clmacro_count++] =
2537 string_sprintf("-D%s=%s", m->name, m->replacement);
2542 /* -d: Set debug level (see also -v below) or set the drop_cr option.
2543 The latter is now a no-op, retained for compatibility only. If -dd is used,
2544 debugging subprocesses of the daemon is disabled. */
2547 if (Ustrcmp(argrest, "ropcr") == 0)
2549 /* drop_cr = TRUE; */
2552 /* Use an intermediate variable so that we don't set debugging while
2553 decoding the debugging bits. */
2557 unsigned int selector = D_default;
2560 if (*argrest == 'd')
2562 f.debug_daemon = TRUE;
2566 decode_bits(&selector, 1, debug_notall, argrest,
2567 debug_options, debug_options_count, US"debug", 0);
2568 debug_selector = selector;
2573 /* -E: This is a local error message. This option is not intended for
2574 external use at all, but is not restricted to trusted callers because it
2575 does no harm (just suppresses certain error messages) and if Exim is run
2576 not setuid root it won't always be trusted when it generates error
2577 messages using this option. If there is a message id following -E, point
2578 message_reference at it, for logging. */
2581 f.local_error_message = TRUE;
2582 if (mac_ismsgid(argrest)) message_reference = argrest;
2586 /* -ex: The vacation program calls sendmail with the undocumented "-eq"
2587 option, so it looks as if historically the -oex options are also callable
2588 without the leading -o. So we have to accept them. Before the switch,
2589 anything starting -oe has been converted to -e. Exim does not support all
2590 of the sendmail error options. */
2593 if (Ustrcmp(argrest, "e") == 0)
2595 arg_error_handling = ERRORS_SENDER;
2596 errors_sender_rc = EXIT_SUCCESS;
2598 else if (Ustrcmp(argrest, "m") == 0) arg_error_handling = ERRORS_SENDER;
2599 else if (Ustrcmp(argrest, "p") == 0) arg_error_handling = ERRORS_STDERR;
2600 else if (Ustrcmp(argrest, "q") == 0) arg_error_handling = ERRORS_STDERR;
2601 else if (Ustrcmp(argrest, "w") == 0) arg_error_handling = ERRORS_SENDER;
2606 /* -F: Set sender's full name, used instead of the gecos entry from
2607 the password file. Since users can usually alter their gecos entries,
2608 there's no security involved in using this instead. The data can follow
2609 the -F or be in the next argument. */
2613 if (++i < argc) argrest = argv[i]; else { badarg = TRUE; break; }
2614 originator_name = string_copy_taint(argrest, TRUE);
2615 f.sender_name_forced = TRUE;
2619 /* -f: Set sender's address - this value is only actually used if Exim is
2620 run by a trusted user, or if untrusted_set_sender is set and matches the
2621 address, except that the null address can always be set by any user. The
2622 test for this happens later, when the value given here is ignored when not
2623 permitted. For an untrusted user, the actual sender is still put in Sender:
2624 if it doesn't match the From: header (unless no_local_from_check is set).
2625 The data can follow the -f or be in the next argument. The -r switch is an
2626 obsolete form of -f but since there appear to be programs out there that
2627 use anything that sendmail has ever supported, better accept it - the
2628 synonymizing is done before the switch above.
2630 At this stage, we must allow domain literal addresses, because we don't
2631 know what the setting of allow_domain_literals is yet. Ditto for trailing
2632 dots and strip_trailing_dot. */
2636 int dummy_start, dummy_end;
2639 if (i+1 < argc) argrest = argv[++i]; else { badarg = TRUE; break; }
2641 *(sender_address = store_get(1, FALSE)) = '\0'; /* Ensure writeable memory */
2644 uschar * temp = argrest + Ustrlen(argrest) - 1;
2645 while (temp >= argrest && isspace(*temp)) temp--;
2646 if (temp >= argrest && *temp == '.') f_end_dot = TRUE;
2647 allow_domain_literals = TRUE;
2648 strip_trailing_dot = TRUE;
2650 allow_utf8_domains = TRUE;
2652 if (!(sender_address = parse_extract_address(argrest, &errmess,
2653 &dummy_start, &dummy_end, &sender_address_domain, TRUE)))
2654 exim_fail("exim: bad -f address \"%s\": %s\n", argrest, errmess);
2656 sender_address = string_copy_taint(sender_address, TRUE);
2658 message_smtputf8 = string_is_utf8(sender_address);
2659 allow_utf8_domains = FALSE;
2661 allow_domain_literals = FALSE;
2662 strip_trailing_dot = FALSE;
2664 f.sender_address_forced = TRUE;
2668 /* -G: sendmail invocation to specify that it's a gateway submission and
2669 sendmail may complain about problems instead of fixing them.
2670 We make it equivalent to an ACL "control = suppress_local_fixups" and do
2671 not at this time complain about problems. */
2677 /* -h: Set the hop count for an incoming message. Exim does not currently
2678 support this; it always computes it by counting the Received: headers.
2679 To put it in will require a change to the spool header file format. */
2683 if (++i < argc) argrest = argv[i]; else { badarg = TRUE; break; }
2684 if (!isdigit(*argrest)) badarg = TRUE;
2688 /* -i: Set flag so dot doesn't end non-SMTP input (same as -oi, seems
2689 not to be documented for sendmail but mailx (at least) uses it) */
2692 if (!*argrest) f.dot_ends = FALSE; else badarg = TRUE;
2696 /* -L: set the identifier used for syslog; equivalent to setting
2697 syslog_processname in the config file, but needs to be an admin option. */
2701 if (++i < argc) argrest = argv[i]; else { badarg = TRUE; break; }
2702 if ((sz = Ustrlen(argrest)) > 32)
2703 exim_fail("exim: the -L syslog name is too long: \"%s\"\n", argrest);
2705 exim_fail("exim: the -L syslog name is too short\n");
2706 cmdline_syslog_name = string_copy_taint(argrest, TRUE);
2710 receiving_message = FALSE;
2712 /* -MC: continue delivery of another message via an existing open
2713 file descriptor. This option is used for an internal call by the
2714 smtp transport when there is a pending message waiting to go to an
2715 address to which it has got a connection. Five subsequent arguments are
2716 required: transport name, host name, IP address, sequence number, and
2717 message_id. Transports may decline to create new processes if the sequence
2718 number gets too big. The channel is stdin. This (-MC) must be the last
2719 argument. There's a subsequent check that the real-uid is privileged.
2721 If we are running in the test harness. delay for a bit, to let the process
2722 that set this one up complete. This makes for repeatability of the logging,
2725 if (Ustrcmp(argrest, "C") == 0)
2727 union sockaddr_46 interface_sock;
2728 EXIM_SOCKLEN_T size = sizeof(interface_sock);
2731 exim_fail("exim: too many or too few arguments after -MC\n");
2733 if (msg_action_arg >= 0)
2734 exim_fail("exim: incompatible arguments\n");
2736 continue_transport = string_copy_taint(argv[++i], TRUE);
2737 continue_hostname = string_copy_taint(argv[++i], TRUE);
2738 continue_host_address = string_copy_taint(argv[++i], TRUE);
2739 continue_sequence = Uatoi(argv[++i]);
2740 msg_action = MSG_DELIVER;
2741 msg_action_arg = ++i;
2742 forced_delivery = TRUE;
2743 queue_run_pid = passed_qr_pid;
2744 queue_run_pipe = passed_qr_pipe;
2746 if (!mac_ismsgid(argv[i]))
2747 exim_fail("exim: malformed message id %s after -MC option\n",
2750 /* Set up $sending_ip_address and $sending_port, unless proxied */
2752 if (!continue_proxy_cipher)
2753 if (getsockname(fileno(stdin), (struct sockaddr *)(&interface_sock),
2755 sending_ip_address = host_ntoa(-1, &interface_sock, NULL,
2758 exim_fail("exim: getsockname() failed after -MC option: %s\n",
2761 testharness_pause_ms(500);
2765 else if (*argrest == 'C' && argrest[1] && !argrest[2])
2769 /* -MCA: set the smtp_authenticated flag; this is useful only when it
2770 precedes -MC (see above). The flag indicates that the host to which
2771 Exim is connected has accepted an AUTH sequence. */
2773 case 'A': f.smtp_authenticated = TRUE; break;
2775 /* -MCD: set the smtp_use_dsn flag; this indicates that the host
2776 that exim is connected to supports the esmtp extension DSN */
2778 case 'D': smtp_peer_options |= OPTION_DSN; break;
2780 /* -MCd: for debug, set a process-purpose string */
2782 case 'd': if (++i < argc)
2783 process_purpose = string_copy_taint(argv[i], TRUE);
2787 /* -MCG: set the queue name, to a non-default value. Arguably, anything
2788 from the commandline should be tainted - but we will need an untainted
2789 value for the spoolfile when doing a -odi delivery process. */
2791 case 'G': if (++i < argc) queue_name = string_copy_taint(argv[i], FALSE);
2795 /* -MCK: the peer offered CHUNKING. Must precede -MC */
2797 case 'K': smtp_peer_options |= OPTION_CHUNKING; break;
2799 #ifdef EXPERIMENTAL_ESMTP_LIMITS
2800 /* -MCL: peer used LIMITS RCPTMAX and/or RCPTDOMAINMAX */
2801 case 'L': if (++i < argc) continue_limit_mail = Uatoi(argv[i]);
2803 if (++i < argc) continue_limit_rcpt = Uatoi(argv[i]);
2805 if (++i < argc) continue_limit_rcptdom = Uatoi(argv[i]);
2810 /* -MCP: set the smtp_use_pipelining flag; this is useful only when
2811 it preceded -MC (see above) */
2813 case 'P': smtp_peer_options |= OPTION_PIPE; break;
2815 #ifdef SUPPORT_SOCKS
2816 /* -MCp: Socks proxy in use; nearside IP, port, external IP, port */
2817 case 'p': proxy_session = TRUE;
2820 proxy_local_address = string_copy_taint(argv[i], TRUE);
2823 proxy_local_port = Uatoi(argv[i]);
2826 proxy_external_address = string_copy_taint(argv[i], TRUE);
2829 proxy_external_port = Uatoi(argv[i]);
2835 /* -MCQ: pass on the pid of the queue-running process that started
2836 this chain of deliveries and the fd of its synchronizing pipe; this
2837 is useful only when it precedes -MC (see above) */
2839 case 'Q': if (++i < argc) passed_qr_pid = (pid_t)(Uatol(argv[i]));
2841 if (++i < argc) passed_qr_pipe = (int)(Uatol(argv[i]));
2845 /* -MCq: do a quota check on the given recipient for the given size
2846 of message. Separate from -MC. */
2847 case 'q': rcpt_verify_quota = TRUE;
2848 if (++i < argc) message_size = Uatoi(argv[i]);
2852 /* -MCS: set the smtp_use_size flag; this is useful only when it
2853 precedes -MC (see above) */
2855 case 'S': smtp_peer_options |= OPTION_SIZE; break;
2858 /* -MCs: used with -MCt; SNI was sent */
2859 /* -MCr: ditto, DANE */
2862 case 's': if (++i < argc)
2864 continue_proxy_sni = string_copy_taint(argv[i], TRUE);
2865 if (argrest[1] == 'r') continue_proxy_dane = TRUE;
2870 /* -MCt: similar to -MCT below but the connection is still open
2871 via a proxy process which handles the TLS context and coding.
2872 Require three arguments for the proxied local address and port,
2873 and the TLS cipher. */
2875 case 't': if (++i < argc)
2876 sending_ip_address = string_copy_taint(argv[i], TRUE);
2879 sending_port = (int)(Uatol(argv[i]));
2882 continue_proxy_cipher = string_copy_taint(argv[i], TRUE);
2886 /* -MCT: set the tls_offered flag; this is useful only when it
2887 precedes -MC (see above). The flag indicates that the host to which
2888 Exim is connected has offered TLS support. */
2890 case 'T': smtp_peer_options |= OPTION_TLS; break;
2893 default: badarg = TRUE; break;
2898 /* -M[x]: various operations on the following list of message ids:
2899 -M deliver the messages, ignoring next retry times and thawing
2900 -Mc deliver the messages, checking next retry times, no thawing
2901 -Mf freeze the messages
2902 -Mg give up on the messages
2903 -Mt thaw the messages
2904 -Mrm remove the messages
2905 In the above cases, this must be the last option. There are also the
2906 following options which are followed by a single message id, and which
2907 act on that message. Some of them use the "recipient" addresses as well.
2908 -Mar add recipient(s)
2909 -Mmad mark all recipients delivered
2910 -Mmd mark recipients(s) delivered
2912 -Mset load a message for use with -be
2914 -Mvc show copy (of whole message, in RFC 2822 format)
2921 msg_action = MSG_DELIVER;
2922 forced_delivery = f.deliver_force_thaw = TRUE;
2924 else if (Ustrcmp(argrest, "ar") == 0)
2926 msg_action = MSG_ADD_RECIPIENT;
2927 one_msg_action = TRUE;
2929 else if (Ustrcmp(argrest, "c") == 0) msg_action = MSG_DELIVER;
2930 else if (Ustrcmp(argrest, "es") == 0)
2932 msg_action = MSG_EDIT_SENDER;
2933 one_msg_action = TRUE;
2935 else if (Ustrcmp(argrest, "f") == 0) msg_action = MSG_FREEZE;
2936 else if (Ustrcmp(argrest, "g") == 0)
2938 msg_action = MSG_DELIVER;
2939 deliver_give_up = TRUE;
2941 else if (Ustrcmp(argrest, "G") == 0)
2943 msg_action = MSG_SETQUEUE;
2944 queue_name_dest = string_copy_taint(argv[++i], TRUE);
2946 else if (Ustrcmp(argrest, "mad") == 0)
2948 msg_action = MSG_MARK_ALL_DELIVERED;
2950 else if (Ustrcmp(argrest, "md") == 0)
2952 msg_action = MSG_MARK_DELIVERED;
2953 one_msg_action = TRUE;
2955 else if (Ustrcmp(argrest, "rm") == 0) msg_action = MSG_REMOVE;
2956 else if (Ustrcmp(argrest, "set") == 0)
2958 msg_action = MSG_LOAD;
2959 one_msg_action = TRUE;
2961 else if (Ustrcmp(argrest, "t") == 0) msg_action = MSG_THAW;
2962 else if (Ustrcmp(argrest, "vb") == 0)
2964 msg_action = MSG_SHOW_BODY;
2965 one_msg_action = TRUE;
2967 else if (Ustrcmp(argrest, "vc") == 0)
2969 msg_action = MSG_SHOW_COPY;
2970 one_msg_action = TRUE;
2972 else if (Ustrcmp(argrest, "vh") == 0)
2974 msg_action = MSG_SHOW_HEADER;
2975 one_msg_action = TRUE;
2977 else if (Ustrcmp(argrest, "vl") == 0)
2979 msg_action = MSG_SHOW_LOG;
2980 one_msg_action = TRUE;
2982 else { badarg = TRUE; break; }
2984 /* All the -Mxx options require at least one message id. */
2986 msg_action_arg = i + 1;
2987 if (msg_action_arg >= argc)
2988 exim_fail("exim: no message ids given after %s option\n", arg);
2990 /* Some require only message ids to follow */
2992 if (!one_msg_action)
2994 for (int j = msg_action_arg; j < argc; j++) if (!mac_ismsgid(argv[j]))
2995 exim_fail("exim: malformed message id %s after %s option\n",
2997 goto END_ARG; /* Remaining args are ids */
3000 /* Others require only one message id, possibly followed by addresses,
3001 which will be handled as normal arguments. */
3005 if (!mac_ismsgid(argv[msg_action_arg]))
3006 exim_fail("exim: malformed message id %s after %s option\n",
3007 argv[msg_action_arg], arg);
3013 /* Some programs seem to call the -om option without the leading o;
3014 for sendmail it askes for "me too". Exim always does this. */
3017 if (*argrest) badarg = TRUE;
3021 /* -N: don't do delivery - a debugging option that stops transports doing
3022 their thing. It implies debugging at the D_v level. */
3027 f.dont_deliver = TRUE;
3028 debug_selector |= D_v;
3029 debug_file = stderr;
3035 /* -n: This means "don't alias" in sendmail, apparently.
3036 For normal invocations, it has no effect.
3037 It may affect some other options. */
3043 /* -O: Just ignore it. In sendmail, apparently -O option=value means set
3044 option to the specified value. This form uses long names. We need to handle
3045 -O option=value and -Ooption=value. */
3050 exim_fail("exim: string expected after -O\n");
3056 /* -oA: Set an argument for the bi command (sendmail's "alternate alias
3059 if (!*(alias_arg = argrest))
3060 if (i+1 < argc) alias_arg = argv[++i];
3061 else exim_fail("exim: string expected after -oA\n");
3064 /* -oB: Set a connection message max value for remote deliveries */
3067 uschar * p = argrest;
3069 if (i+1 < argc && isdigit((argv[i+1][0])))
3073 connection_max_messages = 1;
3080 exim_fail("exim: number expected after -oB\n");
3081 connection_max_messages = Uatoi(p);
3086 /* -odb: background delivery */
3089 if (Ustrcmp(argrest, "b") == 0)
3091 f.synchronous_delivery = FALSE;
3092 arg_queue_only = FALSE;
3093 queue_only_set = TRUE;
3096 /* -odd: testsuite-only: add no inter-process delays */
3098 else if (Ustrcmp(argrest, "d") == 0)
3099 f.testsuite_delays = FALSE;
3101 /* -odf: foreground delivery (smail-compatible option); same effect as
3102 -odi: interactive (synchronous) delivery (sendmail-compatible option)
3105 else if (Ustrcmp(argrest, "f") == 0 || Ustrcmp(argrest, "i") == 0)
3107 f.synchronous_delivery = TRUE;
3108 arg_queue_only = FALSE;
3109 queue_only_set = TRUE;
3112 /* -odq: queue only */
3114 else if (Ustrcmp(argrest, "q") == 0)
3116 f.synchronous_delivery = FALSE;
3117 arg_queue_only = TRUE;
3118 queue_only_set = TRUE;
3121 /* -odqs: queue SMTP only - do local deliveries and remote routing,
3122 but no remote delivery */
3124 else if (Ustrcmp(argrest, "qs") == 0)
3126 f.queue_smtp = TRUE;
3127 arg_queue_only = FALSE;
3128 queue_only_set = TRUE;
3133 /* -oex: Sendmail error flags. As these are also accepted without the
3134 leading -o prefix, for compatibility with vacation and other callers,
3135 they are handled with -e above. */
3137 /* -oi: Set flag so dot doesn't end non-SMTP input (same as -i)
3138 -oitrue: Another sendmail syntax for the same */
3141 if (!*argrest || Ustrcmp(argrest, "true") == 0)
3146 /* -oM*: Set various characteristics for an incoming message; actually
3147 acted on for trusted callers only. */
3152 exim_fail("exim: data expected after -oM%s\n", argrest);
3154 /* -oMa: Set sender host address */
3156 if (Ustrcmp(argrest, "a") == 0)
3157 sender_host_address = string_copy_taint(argv[++i], TRUE);
3159 /* -oMaa: Set authenticator name */
3161 else if (Ustrcmp(argrest, "aa") == 0)
3162 sender_host_authenticated = string_copy_taint(argv[++i], TRUE);
3164 /* -oMas: setting authenticated sender */
3166 else if (Ustrcmp(argrest, "as") == 0)
3167 authenticated_sender = string_copy_taint(argv[++i], TRUE);
3169 /* -oMai: setting authenticated id */
3171 else if (Ustrcmp(argrest, "ai") == 0)
3172 authenticated_id = string_copy_taint(argv[++i], TRUE);
3174 /* -oMi: Set incoming interface address */
3176 else if (Ustrcmp(argrest, "i") == 0)
3177 interface_address = string_copy_taint(argv[++i], TRUE);
3179 /* -oMm: Message reference */
3181 else if (Ustrcmp(argrest, "m") == 0)
3183 if (!mac_ismsgid(argv[i+1]))
3184 exim_fail("-oMm must be a valid message ID\n");
3185 if (!f.trusted_config)
3186 exim_fail("-oMm must be called by a trusted user/config\n");
3187 message_reference = argv[++i];
3190 /* -oMr: Received protocol */
3192 else if (Ustrcmp(argrest, "r") == 0)
3194 if (received_protocol)
3195 exim_fail("received_protocol is set already\n");
3197 received_protocol = string_copy_taint(argv[++i], TRUE);
3199 /* -oMs: Set sender host name */
3201 else if (Ustrcmp(argrest, "s") == 0)
3202 sender_host_name = string_copy_taint(argv[++i], TRUE);
3204 /* -oMt: Set sender ident */
3206 else if (Ustrcmp(argrest, "t") == 0)
3208 sender_ident_set = TRUE;
3209 sender_ident = string_copy_taint(argv[++i], TRUE);
3212 /* Else a bad argument */
3219 /* -om: Me-too flag for aliases. Exim always does this. Some programs
3220 seem to call this as -m (undocumented), so that is also accepted (see
3222 /* -oo: An ancient flag for old-style addresses which still seems to
3223 crop up in some calls (see in SCO). */
3227 if (*argrest) badarg = TRUE;
3230 /* -oP <name>: set pid file path for daemon
3231 -oPX: delete pid file of daemon */
3234 if (!*argrest) override_pid_file_path = argv[++i];
3235 else if (Ustrcmp(argrest, "X") == 0) delete_pid_file();
3240 /* -or <n>: set timeout for non-SMTP acceptance
3241 -os <n>: set timeout for SMTP acceptance */
3246 int * tp = argrest[-1] == 'r'
3247 ? &arg_receive_timeout : &arg_smtp_receive_timeout;
3249 *tp = readconf_readtime(argrest, 0, FALSE);
3250 else if (i+1 < argc)
3251 *tp = readconf_readtime(argv[++i], 0, FALSE);
3254 exim_fail("exim: bad time value %s: abandoned\n", argv[i]);
3258 /* -oX <list>: Override local_interfaces and/or default daemon ports */
3261 if (*argrest) badarg = TRUE;
3262 else override_local_interfaces = string_copy_taint(argv[++i], TRUE);
3265 /* -oY: Override creation of daemon notifier socket */
3268 if (*argrest) badarg = TRUE;
3269 else notifier_socket = NULL;
3272 /* Unknown -o argument */
3280 /* -ps: force Perl startup; -pd force delayed Perl startup */
3284 if (*argrest == 's' && argrest[1] == 0)
3286 perl_start_option = 1;
3289 if (*argrest == 'd' && argrest[1] == 0)
3291 perl_start_option = -1;
3296 /* -panythingelse is taken as the Sendmail-compatible argument -prval:sval,
3297 which sets the host protocol and host name */
3300 if (i+1 < argc) argrest = argv[++i]; else { badarg = TRUE; break; }
3304 uschar * hn = Ustrchr(argrest, ':');
3306 if (received_protocol)
3307 exim_fail("received_protocol is set already\n");
3310 received_protocol = string_copy_taint(argrest, TRUE);
3313 received_protocol = string_copyn_taint(argrest, hn - argrest, TRUE);
3314 sender_host_name = string_copy_taint(hn + 1, TRUE);
3321 receiving_message = FALSE;
3322 if (queue_interval >= 0)
3323 exim_fail("exim: -q specified more than once\n");
3325 /* -qq...: Do queue runs in a 2-stage manner */
3327 if (*argrest == 'q')
3329 f.queue_2stage = TRUE;
3333 /* -qi...: Do only first (initial) deliveries */
3335 if (*argrest == 'i')
3337 f.queue_run_first_delivery = TRUE;
3341 /* -qf...: Run the queue, forcing deliveries
3342 -qff..: Ditto, forcing thawing as well */
3344 if (*argrest == 'f')
3346 f.queue_run_force = TRUE;
3347 if (*++argrest == 'f')
3349 f.deliver_force_thaw = TRUE;
3354 /* -q[f][f]l...: Run the queue only on local deliveries */
3356 if (*argrest == 'l')
3358 f.queue_run_local = TRUE;
3362 /* -q[f][f][l][G<name>]... Work on the named queue */
3364 if (*argrest == 'G')
3367 for (argrest++, i = 0; argrest[i] && argrest[i] != '/'; ) i++;
3368 queue_name = string_copyn(argrest, i);
3370 if (*argrest == '/') argrest++;
3373 /* -q[f][f][l][G<name>]: Run the queue, optionally forced, optionally local
3374 only, optionally named, optionally starting from a given message id. */
3376 if (!(list_queue || count_queue))
3378 && (i + 1 >= argc || argv[i+1][0] == '-' || mac_ismsgid(argv[i+1])))
3381 if (i+1 < argc && mac_ismsgid(argv[i+1]))
3382 start_queue_run_id = string_copy_taint(argv[++i], TRUE);
3383 if (i+1 < argc && mac_ismsgid(argv[i+1]))
3384 stop_queue_run_id = string_copy_taint(argv[++i], TRUE);
3387 /* -q[f][f][l][G<name>/]<n>: Run the queue at regular intervals, optionally
3388 forced, optionally local only, optionally named. */
3390 else if ((queue_interval = readconf_readtime(*argrest ? argrest : argv[++i],
3392 exim_fail("exim: bad time value %s: abandoned\n", argv[i]);
3396 case 'R': /* Synonymous with -qR... */
3397 receiving_message = FALSE;
3399 /* -Rf: As -R (below) but force all deliveries,
3400 -Rff: Ditto, but also thaw all frozen messages,
3401 -Rr: String is regex
3402 -Rrf: Regex and force
3403 -Rrff: Regex and force and thaw
3405 in all cases provided there are no further characters in this
3409 for (int i = 0; i < nelem(rsopts); i++)
3410 if (Ustrcmp(argrest, rsopts[i]) == 0)
3412 if (i != 2) f.queue_run_force = TRUE;
3413 if (i >= 2) f.deliver_selectstring_regex = TRUE;
3414 if (i == 1 || i == 4) f.deliver_force_thaw = TRUE;
3415 argrest += Ustrlen(rsopts[i]);
3418 /* -R: Set string to match in addresses for forced queue run to
3419 pick out particular messages. */
3422 deliver_selectstring = string_copy_taint(argrest, TRUE);
3423 else if (i+1 < argc)
3424 deliver_selectstring = string_copy_taint(argv[++i], TRUE);
3426 exim_fail("exim: string expected after -R\n");
3430 /* -r: an obsolete synonym for -f (see above) */
3433 /* -S: Like -R but works on sender. */
3435 case 'S': /* Synonymous with -qS... */
3436 receiving_message = FALSE;
3438 /* -Sf: As -S (below) but force all deliveries,
3439 -Sff: Ditto, but also thaw all frozen messages,
3440 -Sr: String is regex
3441 -Srf: Regex and force
3442 -Srff: Regex and force and thaw
3444 in all cases provided there are no further characters in this
3448 for (int i = 0; i < nelem(rsopts); i++)
3449 if (Ustrcmp(argrest, rsopts[i]) == 0)
3451 if (i != 2) f.queue_run_force = TRUE;
3452 if (i >= 2) f.deliver_selectstring_sender_regex = TRUE;
3453 if (i == 1 || i == 4) f.deliver_force_thaw = TRUE;
3454 argrest += Ustrlen(rsopts[i]);
3457 /* -S: Set string to match in addresses for forced queue run to
3458 pick out particular messages. */
3461 deliver_selectstring_sender = string_copy_taint(argrest, TRUE);
3462 else if (i+1 < argc)
3463 deliver_selectstring_sender = string_copy_taint(argv[++i], TRUE);
3465 exim_fail("exim: string expected after -S\n");
3468 /* -Tqt is an option that is exclusively for use by the testing suite.
3469 It is not recognized in other circumstances. It allows for the setting up
3470 of explicit "queue times" so that various warning/retry things can be
3471 tested. Otherwise variability of clock ticks etc. cause problems. */
3474 if (f.running_in_test_harness && Ustrcmp(argrest, "qt") == 0)
3475 fudged_queue_times = string_copy_taint(argv[++i], TRUE);
3480 /* -t: Set flag to extract recipients from body of message. */
3483 if (!*argrest) extract_recipients = TRUE;
3485 /* -ti: Set flag to extract recipients from body of message, and also
3486 specify that dot does not end the message. */
3488 else if (Ustrcmp(argrest, "i") == 0)
3490 extract_recipients = TRUE;
3494 /* -tls-on-connect: don't wait for STARTTLS (for old clients) */
3497 else if (Ustrcmp(argrest, "ls-on-connect") == 0) tls_in.on_connect = TRUE;
3504 /* -U: This means "initial user submission" in sendmail, apparently. The
3505 doc claims that in future sendmail may refuse syntactically invalid
3506 messages instead of fixing them. For the moment, we just ignore it. */
3512 /* -v: verify things - this is a very low-level debugging */
3517 debug_selector |= D_v;
3518 debug_file = stderr;
3524 /* -x: AIX uses this to indicate some fancy 8-bit character stuff:
3526 The -x flag tells the sendmail command that mail from a local
3527 mail program has National Language Support (NLS) extended characters
3528 in the body of the mail item. The sendmail command can send mail with
3529 extended NLS characters across networks that normally corrupts these
3532 As Exim is 8-bit clean, it just ignores this flag. */
3535 if (*argrest) badarg = TRUE;
3538 /* -X: in sendmail: takes one parameter, logfile, and sends debugging
3539 logs to that file. We swallow the parameter and otherwise ignore it. */
3544 exim_fail("exim: string expected after -X\n");
3550 log_oneline = string_copy_taint(argv[i], TRUE);
3552 exim_fail("exim: file name expected after %s\n", argv[i-1]);
3555 /* All other initial characters are errors */
3560 } /* End of high-level switch statement */
3562 /* Failed to recognize the option, or syntax error */
3565 exim_fail("exim abandoned: unknown, malformed, or incomplete "
3566 "option %s\n", arg);
3570 /* If -R or -S have been specified without -q, assume a single queue run. */
3572 if ( (deliver_selectstring || deliver_selectstring_sender)
3573 && queue_interval < 0)
3578 store_pool = old_pool;
3581 /* If usage_wanted is set we call the usage function - which never returns */
3582 if (usage_wanted) exim_usage(called_as);
3584 /* Arguments have been processed. Check for incompatibilities. */
3585 if ( ( (smtp_input || extract_recipients || recipients_arg < argc)
3586 && ( f.daemon_listen || queue_interval >= 0 || bi_option
3587 || test_retry_arg >= 0 || test_rewrite_arg >= 0
3588 || filter_test != FTEST_NONE
3589 || msg_action_arg > 0 && !one_msg_action
3591 || ( msg_action_arg > 0
3592 && ( f.daemon_listen || queue_interval > 0 || list_options
3593 || checking && msg_action != MSG_LOAD
3594 || bi_option || test_retry_arg >= 0 || test_rewrite_arg >= 0
3596 || ( (f.daemon_listen || queue_interval > 0)
3597 && ( sender_address || list_options || list_queue || checking
3600 || f.daemon_listen && queue_interval == 0
3601 || f.inetd_wait_mode && queue_interval >= 0
3603 && ( checking || smtp_input || extract_recipients
3604 || filter_test != FTEST_NONE || bi_option
3606 || ( verify_address_mode
3607 && ( f.address_test_mode || smtp_input || extract_recipients
3608 || filter_test != FTEST_NONE || bi_option
3610 || ( f.address_test_mode
3611 && ( smtp_input || extract_recipients || filter_test != FTEST_NONE
3615 && (sender_address || filter_test != FTEST_NONE || extract_recipients)
3617 || deliver_selectstring && queue_interval < 0
3618 || msg_action == MSG_LOAD && (!expansion_test || expansion_test_message)
3620 exim_fail("exim: incompatible command-line options or arguments\n");
3622 /* If debugging is set up, set the file and the file descriptor to pass on to
3623 child processes. It should, of course, be 2 for stderr. Also, force the daemon
3624 to run in the foreground. */
3626 if (debug_selector != 0)
3628 debug_file = stderr;
3629 debug_fd = fileno(debug_file);
3630 f.background_daemon = FALSE;
3631 testharness_pause_ms(100); /* lets caller finish */
3632 if (debug_selector != D_v) /* -v only doesn't show this */
3634 debug_printf("Exim version %s uid=%ld gid=%ld pid=%d D=%x\n",
3635 version_string, (long int)real_uid, (long int)real_gid, (int)getpid(),
3637 if (!version_printed)
3638 show_whats_supported(stderr);
3642 /* When started with root privilege, ensure that the limits on the number of
3643 open files and the number of processes (where that is accessible) are
3644 sufficiently large, or are unset, in case Exim has been called from an
3645 environment where the limits are screwed down. Not all OS have the ability to
3646 change some of these limits. */
3650 DEBUG(D_any) debug_print_ids(US"Exim has no root privilege:");
3656 #ifdef RLIMIT_NOFILE
3657 if (getrlimit(RLIMIT_NOFILE, &rlp) < 0)
3659 log_write(0, LOG_MAIN|LOG_PANIC, "getrlimit(RLIMIT_NOFILE) failed: %s",
3661 rlp.rlim_cur = rlp.rlim_max = 0;
3664 /* I originally chose 1000 as a nice big number that was unlikely to
3665 be exceeded. It turns out that some older OS have a fixed upper limit of
3668 if (rlp.rlim_cur < 1000)
3670 rlp.rlim_cur = rlp.rlim_max = 1000;
3671 if (setrlimit(RLIMIT_NOFILE, &rlp) < 0)
3673 rlp.rlim_cur = rlp.rlim_max = 256;
3674 if (setrlimit(RLIMIT_NOFILE, &rlp) < 0)
3675 log_write(0, LOG_MAIN|LOG_PANIC, "setrlimit(RLIMIT_NOFILE) failed: %s",
3682 if (getrlimit(RLIMIT_NPROC, &rlp) < 0)
3684 log_write(0, LOG_MAIN|LOG_PANIC, "getrlimit(RLIMIT_NPROC) failed: %s",
3686 rlp.rlim_cur = rlp.rlim_max = 0;
3689 #ifdef RLIM_INFINITY
3690 if (rlp.rlim_cur != RLIM_INFINITY && rlp.rlim_cur < 1000)
3692 rlp.rlim_cur = rlp.rlim_max = RLIM_INFINITY;
3694 if (rlp.rlim_cur < 1000)
3696 rlp.rlim_cur = rlp.rlim_max = 1000;
3698 if (setrlimit(RLIMIT_NPROC, &rlp) < 0)
3699 log_write(0, LOG_MAIN|LOG_PANIC, "setrlimit(RLIMIT_NPROC) failed: %s",
3705 /* Exim is normally entered as root (but some special configurations are
3706 possible that don't do this). However, it always spins off sub-processes that
3707 set their uid and gid as required for local delivery. We don't want to pass on
3708 any extra groups that root may belong to, so we want to get rid of them all at
3711 We need to obey setgroups() at this stage, before possibly giving up root
3712 privilege for a changed configuration file, but later on we might need to
3713 check on the additional groups for the admin user privilege - can't do that
3714 till after reading the config, which might specify the exim gid. Therefore,
3715 save the group list here first. */
3717 if ((group_count = getgroups(nelem(group_list), group_list)) < 0)
3718 exim_fail("exim: getgroups() failed: %s\n", strerror(errno));
3720 /* There is a fundamental difference in some BSD systems in the matter of
3721 groups. FreeBSD and BSDI are known to be different; NetBSD and OpenBSD are
3722 known not to be different. On the "different" systems there is a single group
3723 list, and the first entry in it is the current group. On all other versions of
3724 Unix there is a supplementary group list, which is in *addition* to the current
3725 group. Consequently, to get rid of all extraneous groups on a "standard" system
3726 you pass over 0 groups to setgroups(), while on a "different" system you pass
3727 over a single group - the current group, which is always the first group in the
3728 list. Calling setgroups() with zero groups on a "different" system results in
3729 an error return. The following code should cope with both types of system.
3731 Unfortunately, recent MacOS, which should be a FreeBSD, "helpfully" succeeds
3732 the "setgroups() with zero groups" - and changes the egid.
3733 Thanks to that we had to stash the original_egid above, for use below
3734 in the call to exim_setugid().
3736 However, if this process isn't running as root, setgroups() can't be used
3737 since you have to be root to run it, even if throwing away groups.
3738 Except, sigh, for Hurd - where you can.
3739 Not being root here happens only in some unusual configurations. */
3742 #ifndef OS_SETGROUPS_ZERO_DROPS_ALL
3743 && setgroups(0, NULL) != 0
3745 && setgroups(1, group_list) != 0)
3746 exim_fail("exim: setgroups() failed: %s\n", strerror(errno));
3748 /* If the configuration file name has been altered by an argument on the
3749 command line (either a new file name or a macro definition) and the caller is
3750 not root, or if this is a filter testing run, remove any setuid privilege the
3751 program has and run as the underlying user.
3753 The exim user is locked out of this, which severely restricts the use of -C
3756 Otherwise, set the real ids to the effective values (should be root unless run
3757 from inetd, which it can either be root or the exim uid, if one is configured).
3759 There is a private mechanism for bypassing some of this, in order to make it
3760 possible to test lots of configurations automatically, without having either to
3761 recompile each time, or to patch in an actual configuration file name and other
3762 values (such as the path name). If running in the test harness, pretend that
3763 configuration file changes and macro definitions haven't happened. */
3766 (!f.trusted_config || /* Config changed, or */
3767 !macros_trusted(opt_D_used)) && /* impermissible macros and */
3768 real_uid != root_uid && /* Not root, and */
3769 !f.running_in_test_harness /* Not fudged */
3771 expansion_test /* expansion testing */
3773 filter_test != FTEST_NONE) /* Filter testing */
3775 setgroups(group_count, group_list);
3776 exim_setugid(real_uid, real_gid, FALSE,
3777 US"-C, -D, -be or -bf forces real uid");
3778 removed_privilege = TRUE;
3780 /* In the normal case when Exim is called like this, stderr is available
3781 and should be used for any logging information because attempts to write
3782 to the log will usually fail. To arrange this, we unset really_exim. However,
3783 if no stderr is available there is no point - we might as well have a go
3784 at the log (if it fails, syslog will be written).
3786 Note that if the invoker is Exim, the logs remain available. Messing with
3787 this causes unlogged successful deliveries. */
3789 if (log_stderr && real_uid != exim_uid)
3790 f.really_exim = FALSE;
3793 /* Privilege is to be retained for the moment. It may be dropped later,
3794 depending on the job that this Exim process has been asked to do. For now, set
3795 the real uid to the effective so that subsequent re-execs of Exim are done by a
3799 exim_setugid(geteuid(), original_egid, FALSE, US"forcing real = effective");
3801 /* If testing a filter, open the file(s) now, before wasting time doing other
3802 setups and reading the message. */
3804 if (filter_test & FTEST_SYSTEM)
3805 if ((filter_sfd = Uopen(filter_test_sfile, O_RDONLY, 0)) < 0)
3806 exim_fail("exim: failed to open %s: %s\n", filter_test_sfile,
3809 if (filter_test & FTEST_USER)
3810 if ((filter_ufd = Uopen(filter_test_ufile, O_RDONLY, 0)) < 0)
3811 exim_fail("exim: failed to open %s: %s\n", filter_test_ufile,
3814 /* Initialise lookup_list
3815 If debugging, already called above via version reporting.
3816 In either case, we initialise the list of available lookups while running
3817 as root. All dynamically modules are loaded from a directory which is
3818 hard-coded into the binary and is code which, if not a module, would be
3819 part of Exim already. Ability to modify the content of the directory
3820 is equivalent to the ability to modify a setuid binary!
3822 This needs to happen before we read the main configuration. */
3826 if (f.running_in_test_harness) smtputf8_advertise_hosts = NULL;
3829 /* Read the main runtime configuration data; this gives up if there
3830 is a failure. It leaves the configuration file open so that the subsequent
3831 configuration data for delivery can be read if needed.
3833 NOTE: immediately after opening the configuration file we change the working
3834 directory to "/"! Later we change to $spool_directory. We do it there, because
3835 during readconf_main() some expansion takes place already. */
3837 /* Store the initial cwd before we change directories. Can be NULL if the
3838 dir has already been unlinked. */
3839 initial_cwd = os_getcwd(NULL, 0);
3842 -be[m] expansion test -
3843 -b[fF] filter test new
3845 -bmalware malware_test_file new
3847 -brw rewrite test new
3849 -bv[s] address verify -
3851 -bP <option> (except -bP config, which sets list_config)
3853 If any of these options is set, we suppress warnings about configuration
3854 issues (currently about tls_advertise_hosts and keep_environment not being
3858 #ifdef MEASURE_TIMING
3859 struct timeval t0, diff;
3860 (void)gettimeofday(&t0, NULL);
3863 readconf_main(checking || list_options);
3865 #ifdef MEASURE_TIMING
3866 report_time_since(&t0, US"readconf_main (delta)");
3871 /* Now in directory "/" */
3873 if (cleanup_environment() == FALSE)
3874 log_write(0, LOG_PANIC_DIE, "Can't cleanup environment");
3877 /* If an action on specific messages is requested, or if a daemon or queue
3878 runner is being started, we need to know if Exim was called by an admin user.
3879 This is the case if the real user is root or exim, or if the real group is
3880 exim, or if one of the supplementary groups is exim or a group listed in
3881 admin_groups. We don't fail all message actions immediately if not admin_user,
3882 since some actions can be performed by non-admin users. Instead, set admin_user
3883 for later interrogation. */
3885 if (real_uid == root_uid || real_uid == exim_uid || real_gid == exim_gid)
3886 f.admin_user = TRUE;
3888 for (int i = 0; i < group_count && !f.admin_user; i++)
3889 if (group_list[i] == exim_gid)
3890 f.admin_user = TRUE;
3891 else if (admin_groups)
3892 for (int j = 1; j <= (int)admin_groups[0] && !f.admin_user; j++)
3893 if (admin_groups[j] == group_list[i])
3894 f.admin_user = TRUE;
3896 /* Another group of privileged users are the trusted users. These are root,
3897 exim, and any caller matching trusted_users or trusted_groups. Trusted callers
3898 are permitted to specify sender_addresses with -f on the command line, and
3899 other message parameters as well. */
3901 if (real_uid == root_uid || real_uid == exim_uid)
3902 f.trusted_caller = TRUE;
3906 for (int i = 1; i <= (int)trusted_users[0] && !f.trusted_caller; i++)
3907 if (trusted_users[i] == real_uid)
3908 f.trusted_caller = TRUE;
3911 for (int i = 1; i <= (int)trusted_groups[0] && !f.trusted_caller; i++)
3912 if (trusted_groups[i] == real_gid)
3913 f.trusted_caller = TRUE;
3914 else for (int j = 0; j < group_count && !f.trusted_caller; j++)
3915 if (trusted_groups[i] == group_list[j])
3916 f.trusted_caller = TRUE;
3919 /* At this point, we know if the user is privileged and some command-line
3920 options become possibly impermissible, depending upon the configuration file. */
3922 if (checking && commandline_checks_require_admin && !f.admin_user)
3923 exim_fail("exim: those command-line flags are set to require admin\n");
3925 /* Handle the decoding of logging options. */
3927 decode_bits(log_selector, log_selector_size, log_notall,
3928 log_selector_string, log_options, log_options_count, US"log", 0);
3932 debug_printf("configuration file is %s\n", config_main_filename);
3933 debug_printf("log selectors =");
3934 for (int i = 0; i < log_selector_size; i++)
3935 debug_printf(" %08x", log_selector[i]);
3939 /* If domain literals are not allowed, check the sender address that was
3940 supplied with -f. Ditto for a stripped trailing dot. */
3944 if (sender_address[sender_address_domain] == '[' && !allow_domain_literals)
3945 exim_fail("exim: bad -f address \"%s\": domain literals not "
3946 "allowed\n", sender_address);
3947 if (f_end_dot && !strip_trailing_dot)
3948 exim_fail("exim: bad -f address \"%s.\": domain is malformed "
3949 "(trailing dot not allowed)\n", sender_address);
3952 /* See if an admin user overrode our logging. */
3954 if (cmdline_syslog_name)
3957 syslog_processname = cmdline_syslog_name;
3958 log_file_path = string_copy(CUS"syslog");
3961 /* not a panic, non-privileged users should not be able to spam paniclog */
3963 "exim: you lack sufficient privilege to specify syslog process name\n");
3965 /* Paranoia check of maximum lengths of certain strings. There is a check
3966 on the length of the log file path in log.c, which will come into effect
3967 if there are any calls to write the log earlier than this. However, if we
3968 get this far but the string is very long, it is better to stop now than to
3969 carry on and (e.g.) receive a message and then have to collapse. The call to
3970 log_write() from here will cause the ultimate panic collapse if the complete
3971 file name exceeds the buffer length. */
3973 if (Ustrlen(log_file_path) > 200)
3974 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3975 "log_file_path is longer than 200 chars: aborting");
3977 if (Ustrlen(pid_file_path) > 200)
3978 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3979 "pid_file_path is longer than 200 chars: aborting");
3981 if (Ustrlen(spool_directory) > 200)
3982 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3983 "spool_directory is longer than 200 chars: aborting");
3985 /* Length check on the process name given to syslog for its TAG field,
3986 which is only permitted to be 32 characters or less. See RFC 3164. */
3988 if (Ustrlen(syslog_processname) > 32)
3989 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3990 "syslog_processname is longer than 32 chars: aborting");
3995 log_write(0, LOG_MAIN, "%s", log_oneline);
3996 return EXIT_SUCCESS;
3999 return EXIT_FAILURE;
4001 /* In some operating systems, the environment variable TMPDIR controls where
4002 temporary files are created; Exim doesn't use these (apart from when delivering
4003 to MBX mailboxes), but called libraries such as DBM libraries may require them.
4004 If TMPDIR is found in the environment, reset it to the value defined in the
4005 EXIM_TMPDIR macro, if this macro is defined. For backward compatibility this
4006 macro may be called TMPDIR in old "Local/Makefile"s. It's converted to
4007 EXIM_TMPDIR by the build scripts.
4011 if (environ) for (uschar ** p = USS environ; *p; p++)
4012 if (Ustrncmp(*p, "TMPDIR=", 7) == 0 && Ustrcmp(*p+7, EXIM_TMPDIR) != 0)
4014 uschar * newp = store_malloc(Ustrlen(EXIM_TMPDIR) + 8);
4015 sprintf(CS newp, "TMPDIR=%s", EXIM_TMPDIR);
4017 DEBUG(D_any) debug_printf("reset TMPDIR=%s in environment\n", EXIM_TMPDIR);
4021 /* Timezone handling. If timezone_string is "utc", set a flag to cause all
4022 timestamps to be in UTC (gmtime() is used instead of localtime()). Otherwise,
4023 we may need to get rid of a bogus timezone setting. This can arise when Exim is
4024 called by a user who has set the TZ variable. This then affects the timestamps
4025 in log files and in Received: headers, and any created Date: header lines. The
4026 required timezone is settable in the configuration file, so nothing can be done
4027 about this earlier - but hopefully nothing will normally be logged earlier than
4028 this. We have to make a new environment if TZ is wrong, but don't bother if
4029 timestamps_utc is set, because then all times are in UTC anyway. */
4031 if (timezone_string && strcmpic(timezone_string, US"UTC") == 0)
4032 f.timestamps_utc = TRUE;
4035 uschar *envtz = US getenv("TZ");
4037 ? !timezone_string || Ustrcmp(timezone_string, envtz) != 0
4038 : timezone_string != NULL
4041 uschar **p = USS environ;
4045 if (environ) while (*p++) count++;
4046 if (!envtz) count++;
4047 newp = new = store_malloc(sizeof(uschar *) * (count + 1));
4048 if (environ) for (p = USS environ; *p; p++)
4049 if (Ustrncmp(*p, "TZ=", 3) != 0) *newp++ = *p;
4050 if (timezone_string)
4052 *newp = store_malloc(Ustrlen(timezone_string) + 4);
4053 sprintf(CS *newp++, "TZ=%s", timezone_string);
4058 DEBUG(D_any) debug_printf("Reset TZ to %s: time is %s\n", timezone_string,
4059 tod_stamp(tod_log));
4063 /* Handle the case when we have removed the setuid privilege because of -C or
4064 -D. This means that the caller of Exim was not root.
4066 There is a problem if we were running as the Exim user. The sysadmin may
4067 expect this case to retain privilege because "the binary was called by the
4068 Exim user", but it hasn't, because either the -D option set macros, or the
4069 -C option set a non-trusted configuration file. There are two possibilities:
4071 (1) If deliver_drop_privilege is set, Exim is not going to re-exec in order
4072 to do message deliveries. Thus, the fact that it is running as a
4073 non-privileged user is plausible, and might be wanted in some special
4074 configurations. However, really_exim will have been set false when
4075 privilege was dropped, to stop Exim trying to write to its normal log
4076 files. Therefore, re-enable normal log processing, assuming the sysadmin
4077 has set up the log directory correctly.
4079 (2) If deliver_drop_privilege is not set, the configuration won't work as
4080 apparently intended, and so we log a panic message. In order to retain
4081 root for -C or -D, the caller must either be root or be invoking a
4082 trusted configuration file (when deliver_drop_privilege is false). */
4084 if ( removed_privilege
4085 && (!f.trusted_config || opt_D_used)
4086 && real_uid == exim_uid)
4087 if (deliver_drop_privilege)
4088 f.really_exim = TRUE; /* let logging work normally */
4090 log_write(0, LOG_MAIN|LOG_PANIC,
4091 "exim user lost privilege for using %s option",
4092 f.trusted_config? "-D" : "-C");
4094 /* Start up Perl interpreter if Perl support is configured and there is a
4095 perl_startup option, and the configuration or the command line specifies
4096 initializing starting. Note that the global variables are actually called
4097 opt_perl_xxx to avoid clashing with perl's namespace (perl_*). */
4100 if (perl_start_option != 0)
4101 opt_perl_at_start = (perl_start_option > 0);
4102 if (opt_perl_at_start && opt_perl_startup != NULL)
4105 DEBUG(D_any) debug_printf("Starting Perl interpreter\n");
4106 if ((errstr = init_perl(opt_perl_startup)))
4107 exim_fail("exim: error in perl_startup code: %s\n", errstr);
4108 opt_perl_started = TRUE;
4110 #endif /* EXIM_PERL */
4112 /* Log the arguments of the call if the configuration file said so. This is
4113 a debugging feature for finding out what arguments certain MUAs actually use.
4114 Don't attempt it if logging is disabled, or if listing variables or if
4115 verifying/testing addresses or expansions. */
4117 if ( (debug_selector & D_any || LOGGING(arguments))
4118 && f.really_exim && !list_options && !checking)
4120 uschar *p = big_buffer;
4121 Ustrcpy(p, US"cwd= (failed)");
4127 Ustrncpy(p + 4, initial_cwd, big_buffer_size-5);
4128 p += 4 + Ustrlen(initial_cwd);
4129 /* in case p is near the end and we don't provide enough space for
4130 * string_format to be willing to write. */
4134 (void)string_format(p, big_buffer_size - (p - big_buffer), " %d args:", argc);
4136 for (int i = 0; i < argc; i++)
4138 int len = Ustrlen(argv[i]);
4139 const uschar *printing;
4141 if (p + len + 8 >= big_buffer + big_buffer_size)
4143 Ustrcpy(p, US" ...");
4144 log_write(0, LOG_MAIN, "%s", big_buffer);
4145 Ustrcpy(big_buffer, US"...");
4148 printing = string_printing(argv[i]);
4149 if (!*printing) quote = US"\"";
4152 const uschar *pp = printing;
4154 while (*pp) if (isspace(*pp++)) { quote = US"\""; break; }
4156 p += sprintf(CS p, " %s%.*s%s", quote, (int)(big_buffer_size -
4157 (p - big_buffer) - 4), printing, quote);
4160 if (LOGGING(arguments))
4161 log_write(0, LOG_MAIN, "%s", big_buffer);
4163 debug_printf("%s\n", big_buffer);
4166 /* Set the working directory to be the top-level spool directory. We don't rely
4167 on this in the code, which always uses fully qualified names, but it's useful
4168 for core dumps etc. Don't complain if it fails - the spool directory might not
4169 be generally accessible and calls with the -C option (and others) have lost
4170 privilege by now. Before the chdir, we try to ensure that the directory exists.
4173 if (Uchdir(spool_directory) != 0)
4175 (void) directory_make(spool_directory, US"", SPOOL_DIRECTORY_MODE, FALSE);
4176 (void) Uchdir(spool_directory);
4179 /* Handle calls with the -bi option. This is a sendmail option to rebuild *the*
4180 alias file. Exim doesn't have such a concept, but this call is screwed into
4181 Sun's YP makefiles. Handle this by calling a configured script, as the real
4182 user who called Exim. The -oA option can be used to pass an argument to the
4187 (void) fclose(config_file);
4188 if (bi_command && *bi_command)
4192 argv[i++] = bi_command;
4193 if (alias_arg) argv[i++] = alias_arg;
4196 setgroups(group_count, group_list);
4197 exim_setugid(real_uid, real_gid, FALSE, US"running bi_command");
4199 DEBUG(D_exec) debug_printf("exec '%.256s' %s%.256s%s\n", argv[0],
4200 argv[1] ? "'" : "", argv[1] ? argv[1] : US"", argv[1] ? "'" : "");
4202 execv(CS argv[0], (char *const *)argv);
4203 exim_fail("exim: exec '%s' failed: %s\n", argv[0], strerror(errno));
4207 DEBUG(D_any) debug_printf("-bi used but bi_command not set; exiting\n");
4212 /* We moved the admin/trusted check to be immediately after reading the
4213 configuration file. We leave these prints here to ensure that syslog setup,
4214 logfile setup, and so on has already happened. */
4216 if (f.trusted_caller) DEBUG(D_any) debug_printf("trusted user\n");
4217 if (f.admin_user) DEBUG(D_any) debug_printf("admin user\n");
4219 /* Only an admin user may start the daemon or force a queue run in the default
4220 configuration, but the queue run restriction can be relaxed. Only an admin
4221 user may request that a message be returned to its sender forthwith. Only an
4222 admin user may specify a debug level greater than D_v (because it might show
4223 passwords, etc. in lookup queries). Only an admin user may request a queue
4224 count. Only an admin user can use the test interface to scan for email
4225 (because Exim will be in the spool dir and able to look at mails). */
4229 BOOL debugset = (debug_selector & ~D_v) != 0;
4230 if ( deliver_give_up || f.daemon_listen || malware_test_file
4231 || count_queue && queue_list_requires_admin
4232 || list_queue && queue_list_requires_admin
4233 || queue_interval >= 0 && prod_requires_admin
4234 || queue_name_dest && prod_requires_admin
4235 || debugset && !f.running_in_test_harness
4237 exim_fail("exim:%s permission denied\n", debugset ? " debugging" : "");
4240 /* If the real user is not root or the exim uid, the argument for passing
4241 in an open TCP/IP connection for another message is not permitted, nor is
4242 running with the -N option for any delivery action, unless this call to exim is
4243 one that supplied an input message, or we are using a patched exim for
4244 regression testing. */
4246 if ( real_uid != root_uid && real_uid != exim_uid
4247 && ( continue_hostname
4249 && (queue_interval >= 0 || f.daemon_listen || msg_action_arg > 0)
4251 && !f.running_in_test_harness
4253 exim_fail("exim: Permission denied\n");
4255 /* If the caller is not trusted, certain arguments are ignored when running for
4256 real, but are permitted when checking things (-be, -bv, -bt, -bh, -bf, -bF).
4257 Note that authority for performing certain actions on messages is tested in the
4258 queue_action() function. */
4260 if (!f.trusted_caller && !checking)
4262 sender_host_name = sender_host_address = interface_address =
4263 sender_ident = received_protocol = NULL;
4264 sender_host_port = interface_port = 0;
4265 sender_host_authenticated = authenticated_sender = authenticated_id = NULL;
4268 /* If a sender host address is set, extract the optional port number off the
4269 end of it and check its syntax. Do the same thing for the interface address.
4270 Exim exits if the syntax is bad. */
4274 if (sender_host_address)
4275 sender_host_port = check_port(sender_host_address);
4276 if (interface_address)
4277 interface_port = check_port(interface_address);
4280 /* If the caller is trusted, then they can use -G to suppress_local_fixups. */
4283 if (f.trusted_caller)
4285 f.suppress_local_fixups = f.suppress_local_fixups_default = TRUE;
4286 DEBUG(D_acl) debug_printf("suppress_local_fixups forced on by -G\n");
4289 exim_fail("exim: permission denied (-G requires a trusted user)\n");
4292 /* If an SMTP message is being received check to see if the standard input is a
4293 TCP/IP socket. If it is, we assume that Exim was called from inetd if the
4294 caller is root or the Exim user, or if the port is a privileged one. Otherwise,
4299 union sockaddr_46 inetd_sock;
4300 EXIM_SOCKLEN_T size = sizeof(inetd_sock);
4301 if (getpeername(0, (struct sockaddr *)(&inetd_sock), &size) == 0)
4303 int family = ((struct sockaddr *)(&inetd_sock))->sa_family;
4304 if (family == AF_INET || family == AF_INET6)
4306 union sockaddr_46 interface_sock;
4307 size = sizeof(interface_sock);
4309 if (getsockname(0, (struct sockaddr *)(&interface_sock), &size) == 0)
4310 interface_address = host_ntoa(-1, &interface_sock, NULL,
4313 if (host_is_tls_on_connect_port(interface_port)) tls_in.on_connect = TRUE;
4315 if (real_uid == root_uid || real_uid == exim_uid || interface_port < 1024)
4318 sender_host_address = host_ntoa(-1, (struct sockaddr *)(&inetd_sock),
4319 NULL, &sender_host_port);
4320 if (mua_wrapper) log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Input from "
4321 "inetd is not supported when mua_wrapper is set");
4325 "exim: Permission denied (unprivileged user, unprivileged port)\n");
4330 /* If the load average is going to be needed while receiving a message, get it
4331 now for those OS that require the first call to os_getloadavg() to be done as
4332 root. There will be further calls later for each message received. */
4334 #ifdef LOAD_AVG_NEEDS_ROOT
4335 if ( receiving_message
4336 && (queue_only_load >= 0 || (f.is_inetd && smtp_load_reserve >= 0)))
4337 load_average = OS_GETLOADAVG();
4340 /* The queue_only configuration option can be overridden by -odx on the command
4341 line, except that if queue_only_override is false, queue_only cannot be unset
4342 from the command line. */
4344 if (queue_only_set && (queue_only_override || arg_queue_only))
4345 queue_only = arg_queue_only;
4347 /* The receive_timeout and smtp_receive_timeout options can be overridden by
4350 if (arg_receive_timeout >= 0) receive_timeout = arg_receive_timeout;
4351 if (arg_smtp_receive_timeout >= 0)
4352 smtp_receive_timeout = arg_smtp_receive_timeout;
4354 /* If Exim was started with root privilege, unless we have already removed the
4355 root privilege above as a result of -C, -D, -be, -bf or -bF, remove it now
4356 except when starting the daemon or doing some kind of delivery or address
4357 testing (-bt). These are the only cases when root need to be retained. We run
4358 as exim for -bv and -bh. However, if deliver_drop_privilege is set, root is
4359 retained only for starting the daemon. We always do the initgroups() in this
4360 situation (controlled by the TRUE below), in order to be as close as possible
4361 to the state Exim usually runs in. */
4363 if ( !unprivileged /* originally had root AND */
4364 && !removed_privilege /* still got root AND */
4365 && !f.daemon_listen /* not starting the daemon */
4366 && queue_interval <= 0 /* (either kind of daemon) */
4367 && ( /* AND EITHER */
4368 deliver_drop_privilege /* requested unprivileged */
4370 queue_interval < 0 /* not running the queue */
4371 && ( msg_action_arg < 0 /* and */
4372 || msg_action != MSG_DELIVER /* not delivering */
4374 && (!checking || !f.address_test_mode) /* not address checking */
4375 && !rcpt_verify_quota /* and not quota checking */
4377 exim_setugid(exim_uid, exim_gid, TRUE, US"privilege not needed");
4379 /* When we are retaining a privileged uid, we still change to the exim gid. */
4384 DEBUG(D_any) debug_printf("dropping to exim gid; retaining priv uid\n");
4385 rv = setgid(exim_gid);
4386 /* Impact of failure is that some stuff might end up with an incorrect group.
4387 We track this for failures from root, since any attempt to change privilege
4388 by root should succeed and failures should be examined. For non-root,
4389 there's no security risk. For me, it's { exim -bV } on a just-built binary,
4390 no need to complain then. */
4392 if (!(unprivileged || removed_privilege))
4393 exim_fail("exim: changing group failed: %s\n", strerror(errno));
4396 DEBUG(D_any) debug_printf("changing group to %ld failed: %s\n",
4397 (long int)exim_gid, strerror(errno));
4401 /* Handle a request to scan a file for malware */
4402 if (malware_test_file)
4404 #ifdef WITH_CONTENT_SCAN
4406 set_process_info("scanning file for malware");
4407 if ((result = malware_in_file(malware_test_file)) == FAIL)
4409 printf("No malware found.\n");
4414 printf("Malware lookup returned non-okay/fail: %d\n", result);
4418 printf("Malware found: %s\n", malware_name);
4420 printf("Malware scan detected malware of unknown name.\n");
4422 printf("Malware scanning not enabled at compile time.\n");
4427 /* Handle a request to list the delivery queue */
4431 set_process_info("listing the queue");
4432 queue_list(list_queue_option, argv + recipients_arg, argc - recipients_arg);
4436 /* Handle a request to count the delivery queue */
4440 set_process_info("counting the queue");
4441 fprintf(stdout, "%u\n", queue_count());
4445 /* Handle actions on specific messages, except for the force delivery and
4446 message load actions, which are done below. Some actions take a whole list of
4447 message ids, which are known to continue up to the end of the arguments. Others
4448 take a single message id and then operate on the recipients list. */
4450 if (msg_action_arg > 0 && msg_action != MSG_DELIVER && msg_action != MSG_LOAD)
4452 int yield = EXIT_SUCCESS;
4453 set_process_info("acting on specified messages");
4455 /* ACL definitions may be needed when removing a message (-Mrm) because
4456 event_action gets expanded */
4458 if (msg_action == MSG_REMOVE)
4461 if (!one_msg_action)
4463 for (i = msg_action_arg; i < argc; i++)
4464 if (!queue_action(argv[i], msg_action, NULL, 0, 0))
4465 yield = EXIT_FAILURE;
4468 case MSG_REMOVE: case MSG_FREEZE: case MSG_THAW: break;
4469 default: printf("\n"); break;
4473 else if (!queue_action(argv[msg_action_arg], msg_action, argv, argc,
4474 recipients_arg)) yield = EXIT_FAILURE;
4478 /* We used to set up here to skip reading the ACL section, on
4479 (msg_action_arg > 0 || (queue_interval == 0 && !f.daemon_listen)
4480 Now, since the intro of the ${acl } expansion, ACL definitions may be
4481 needed in transports so we lost the optimisation. */
4484 #ifdef MEASURE_TIMING
4485 struct timeval t0, diff;
4486 (void)gettimeofday(&t0, NULL);
4491 #ifdef MEASURE_TIMING
4492 report_time_since(&t0, US"readconf_rest (delta)");
4496 /* Handle a request to check quota */
4497 if (rcpt_verify_quota)
4498 if (real_uid != root_uid && real_uid != exim_uid)
4499 exim_fail("exim: Permission denied\n");
4500 else if (recipients_arg >= argc)
4501 exim_fail("exim: missing recipient for quota check\n");
4504 verify_quota(argv[recipients_arg]);
4505 exim_exit(EXIT_SUCCESS);
4508 /* Handle the -brt option. This is for checking out retry configurations.
4509 The next three arguments are a domain name or a complete address, and
4510 optionally two error numbers. All it does is to call the function that
4511 scans the retry configuration data. */
4513 if (test_retry_arg >= 0)
4515 retry_config *yield;
4516 int basic_errno = 0;
4520 if (test_retry_arg >= argc)
4522 printf("-brt needs a domain or address argument\n");
4523 exim_exit(EXIT_FAILURE);
4525 s1 = argv[test_retry_arg++];
4528 /* If the first argument contains no @ and no . it might be a local user
4529 or it might be a single-component name. Treat as a domain. */
4531 if (Ustrchr(s1, '@') == NULL && Ustrchr(s1, '.') == NULL)
4533 printf("Warning: \"%s\" contains no '@' and no '.' characters. It is "
4534 "being \ntreated as a one-component domain, not as a local part.\n\n",
4538 /* There may be an optional second domain arg. */
4540 if (test_retry_arg < argc && Ustrchr(argv[test_retry_arg], '.') != NULL)
4541 s2 = argv[test_retry_arg++];
4543 /* The final arg is an error name */
4545 if (test_retry_arg < argc)
4547 uschar *ss = argv[test_retry_arg];
4549 readconf_retry_error(ss, ss + Ustrlen(ss), &basic_errno, &more_errno);
4552 printf("%s\n", CS error);
4553 return EXIT_FAILURE;
4556 /* For the {MAIL,RCPT,DATA}_4xx errors, a value of 255 means "any", and a
4557 code > 100 as an error is for matching codes to the decade. Turn them into
4558 a real error code, off the decade. */
4560 if (basic_errno == ERRNO_MAIL4XX ||
4561 basic_errno == ERRNO_RCPT4XX ||
4562 basic_errno == ERRNO_DATA4XX)
4564 int code = (more_errno >> 8) & 255;
4566 more_errno = (more_errno & 0xffff00ff) | (21 << 8);
4567 else if (code > 100)
4568 more_errno = (more_errno & 0xffff00ff) | ((code - 96) << 8);
4572 if (!(yield = retry_find_config(s1, s2, basic_errno, more_errno)))
4573 printf("No retry information found\n");
4576 more_errno = yield->more_errno;
4577 printf("Retry rule: %s ", yield->pattern);
4579 if (yield->basic_errno == ERRNO_EXIMQUOTA)
4581 printf("quota%s%s ",
4582 (more_errno > 0)? "_" : "",
4583 (more_errno > 0)? readconf_printtime(more_errno) : US"");
4585 else if (yield->basic_errno == ECONNREFUSED)
4587 printf("refused%s%s ",
4588 (more_errno > 0)? "_" : "",
4589 (more_errno == 'M')? "MX" :
4590 (more_errno == 'A')? "A" : "");
4592 else if (yield->basic_errno == ETIMEDOUT)
4595 if ((more_errno & RTEF_CTOUT) != 0) printf("_connect");
4597 if (more_errno != 0) printf("_%s",
4598 (more_errno == 'M')? "MX" : "A");
4601 else if (yield->basic_errno == ERRNO_AUTHFAIL)
4602 printf("auth_failed ");
4605 for (retry_rule * r = yield->rules; r; r = r->next)
4607 printf("%c,%s", r->rule, readconf_printtime(r->timeout)); /* Do not */
4608 printf(",%s", readconf_printtime(r->p1)); /* amalgamate */
4614 printf(",%d.", x/1000);
4628 exim_exit(EXIT_SUCCESS);
4631 /* Handle a request to list one or more configuration options */
4632 /* If -n was set, we suppress some information */
4637 set_process_info("listing variables");
4638 if (recipients_arg >= argc)
4639 fail = !readconf_print(US"all", NULL, flag_n);
4640 else for (i = recipients_arg; i < argc; i++)
4643 (Ustrcmp(argv[i], "router") == 0 ||
4644 Ustrcmp(argv[i], "transport") == 0 ||
4645 Ustrcmp(argv[i], "authenticator") == 0 ||
4646 Ustrcmp(argv[i], "macro") == 0 ||
4647 Ustrcmp(argv[i], "environment") == 0))
4649 fail |= !readconf_print(argv[i+1], argv[i], flag_n);
4653 fail = !readconf_print(argv[i], NULL, flag_n);
4655 exim_exit(fail ? EXIT_FAILURE : EXIT_SUCCESS);
4660 set_process_info("listing config");
4661 exim_exit(readconf_print(US"config", NULL, flag_n)
4662 ? EXIT_SUCCESS : EXIT_FAILURE);
4666 /* Initialise subsystems as required. */
4670 /* Handle a request to deliver one or more messages that are already on the
4671 queue. Values of msg_action other than MSG_DELIVER and MSG_LOAD are dealt with
4672 above. MSG_LOAD is handled with -be (which is the only time it applies) below.
4674 Delivery of specific messages is typically used for a small number when
4675 prodding by hand (when the option forced_delivery will be set) or when
4676 re-execing to regain root privilege. Each message delivery must happen in a
4677 separate process, so we fork a process for each one, and run them sequentially
4678 so that debugging output doesn't get intertwined, and to avoid spawning too
4679 many processes if a long list is given. However, don't fork for the last one;
4680 this saves a process in the common case when Exim is called to deliver just one
4683 if (msg_action_arg > 0 && msg_action != MSG_LOAD)
4685 if (prod_requires_admin && !f.admin_user)
4687 fprintf(stderr, "exim: Permission denied\n");
4688 exim_exit(EXIT_FAILURE);
4690 set_process_info("delivering specified messages");
4691 if (deliver_give_up) forced_delivery = f.deliver_force_thaw = TRUE;
4692 for (i = msg_action_arg; i < argc; i++)
4696 /*XXX This use of argv[i] for msg_id should really be tainted, but doing
4697 that runs into a later copy into the untainted global message_id[] */
4699 (void)deliver_message(argv[i], forced_delivery, deliver_give_up);
4700 else if ((pid = exim_fork(US"cmdline-delivery")) == 0)
4702 (void)deliver_message(argv[i], forced_delivery, deliver_give_up);
4703 exim_underbar_exit(EXIT_SUCCESS);
4707 fprintf(stderr, "failed to fork delivery process for %s: %s\n", argv[i],
4709 exim_exit(EXIT_FAILURE);
4713 exim_exit(EXIT_SUCCESS);
4717 /* If only a single queue run is requested, without SMTP listening, we can just
4718 turn into a queue runner, with an optional starting message id. */
4720 if (queue_interval == 0 && !f.daemon_listen)
4722 DEBUG(D_queue_run) debug_printf("Single queue run%s%s%s%s\n",
4723 start_queue_run_id ? US" starting at " : US"",
4724 start_queue_run_id ? start_queue_run_id: US"",
4725 stop_queue_run_id ? US" stopping at " : US"",
4726 stop_queue_run_id ? stop_queue_run_id : US"");
4728 set_process_info("running the '%s' queue (single queue run)", queue_name);
4730 set_process_info("running the queue (single queue run)");
4731 queue_run(start_queue_run_id, stop_queue_run_id, FALSE);
4732 exim_exit(EXIT_SUCCESS);
4736 /* Find the login name of the real user running this process. This is always
4737 needed when receiving a message, because it is written into the spool file. It
4738 may also be used to construct a from: or a sender: header, and in this case we
4739 need the user's full name as well, so save a copy of it, checked for RFC822
4740 syntax and munged if necessary, if it hasn't previously been set by the -F
4741 argument. We may try to get the passwd entry more than once, in case NIS or
4742 other delays are in evidence. Save the home directory for use in filter testing
4747 if ((pw = getpwuid(real_uid)) != NULL)
4749 originator_login = string_copy(US pw->pw_name);
4750 originator_home = string_copy(US pw->pw_dir);
4752 /* If user name has not been set by -F, set it from the passwd entry
4753 unless -f has been used to set the sender address by a trusted user. */
4755 if (!originator_name)
4757 if (!sender_address || (!f.trusted_caller && filter_test == FTEST_NONE))
4759 uschar *name = US pw->pw_gecos;
4760 uschar *amp = Ustrchr(name, '&');
4763 /* Most Unix specify that a '&' character in the gecos field is
4764 replaced by a copy of the login name, and some even specify that
4765 the first character should be upper cased, so that's what we do. */
4770 string_format(buffer, sizeof(buffer), "%.*s%n%s%s",
4771 (int)(amp - name), name, &loffset, originator_login, amp + 1);
4772 buffer[loffset] = toupper(buffer[loffset]);
4776 /* If a pattern for matching the gecos field was supplied, apply
4777 it and then expand the name string. */
4779 if (gecos_pattern && gecos_name)
4782 re = regex_must_compile(gecos_pattern, FALSE, TRUE); /* Use malloc */
4784 if (regex_match_and_setup(re, name, 0, -1))
4786 uschar *new_name = expand_string(gecos_name);
4790 DEBUG(D_receive) debug_printf("user name \"%s\" extracted from "
4791 "gecos field \"%s\"\n", new_name, name);
4794 else DEBUG(D_receive) debug_printf("failed to expand gecos_name string "
4795 "\"%s\": %s\n", gecos_name, expand_string_message);
4797 else DEBUG(D_receive) debug_printf("gecos_pattern \"%s\" did not match "
4798 "gecos field \"%s\"\n", gecos_pattern, name);
4799 store_free((void *)re);
4801 originator_name = string_copy(name);
4804 /* A trusted caller has used -f but not -F */
4806 else originator_name = US"";
4809 /* Break the retry loop */
4814 if (++i > finduser_retries) break;
4818 /* If we cannot get a user login, log the incident and give up, unless the
4819 configuration specifies something to use. When running in the test harness,
4820 any setting of unknown_login overrides the actual name. */
4822 if (!originator_login || f.running_in_test_harness)
4826 originator_login = expand_string(unknown_login);
4827 if (!originator_name && unknown_username)
4828 originator_name = expand_string(unknown_username);
4829 if (!originator_name) originator_name = US"";
4831 if (!originator_login)
4832 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Failed to get user name for uid %d",
4836 /* Ensure that the user name is in a suitable form for use as a "phrase" in an
4839 originator_name = US parse_fix_phrase(originator_name, Ustrlen(originator_name));
4841 /* If a message is created by this call of Exim, the uid/gid of its originator
4842 are those of the caller. These values are overridden if an existing message is
4843 read in from the spool. */
4845 originator_uid = real_uid;
4846 originator_gid = real_gid;
4848 DEBUG(D_receive) debug_printf("originator: uid=%d gid=%d login=%s name=%s\n",
4849 (int)originator_uid, (int)originator_gid, originator_login, originator_name);
4851 /* Run in daemon and/or queue-running mode. The function daemon_go() never
4852 returns. We leave this till here so that the originator_ fields are available
4853 for incoming messages via the daemon. The daemon cannot be run in mua_wrapper
4856 if (f.daemon_listen || f.inetd_wait_mode || queue_interval > 0)
4860 fprintf(stderr, "Daemon cannot be run when mua_wrapper is set\n");
4861 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Daemon cannot be run when "
4862 "mua_wrapper is set");
4865 # ifndef DISABLE_TLS
4866 /* This also checks that the library linkage is working and we can call
4867 routines in it, so call even if tls_require_ciphers is unset */
4869 # ifdef MEASURE_TIMING
4870 struct timeval t0, diff;
4871 (void)gettimeofday(&t0, NULL);
4873 if (!tls_dropprivs_validate_require_cipher(FALSE))
4875 # ifdef MEASURE_TIMING
4876 report_time_since(&t0, US"validate_ciphers (delta)");
4884 /* If the sender ident has not been set (by a trusted caller) set it to
4885 the caller. This will get overwritten below for an inetd call. If a trusted
4886 caller has set it empty, unset it. */
4888 if (!sender_ident) sender_ident = originator_login;
4889 else if (!*sender_ident) sender_ident = NULL;
4891 /* Handle the -brw option, which is for checking out rewriting rules. Cause log
4892 writes (on errors) to go to stderr instead. Can't do this earlier, as want the
4893 originator_* variables set. */
4895 if (test_rewrite_arg >= 0)
4897 f.really_exim = FALSE;
4898 if (test_rewrite_arg >= argc)
4900 printf("-brw needs an address argument\n");
4901 exim_exit(EXIT_FAILURE);
4903 rewrite_test(argv[test_rewrite_arg]);
4904 exim_exit(EXIT_SUCCESS);
4907 /* A locally-supplied message is considered to be coming from a local user
4908 unless a trusted caller supplies a sender address with -f, or is passing in the
4909 message via SMTP (inetd invocation or otherwise). */
4911 if ( !sender_address && !smtp_input
4912 || !f.trusted_caller && filter_test == FTEST_NONE)
4914 f.sender_local = TRUE;
4916 /* A trusted caller can supply authenticated_sender and authenticated_id
4917 via -oMas and -oMai and if so, they will already be set. Otherwise, force
4918 defaults except when host checking. */
4920 if (!authenticated_sender && !host_checking)
4921 authenticated_sender = string_sprintf("%s@%s", originator_login,
4922 qualify_domain_sender);
4923 if (!authenticated_id && !host_checking)
4924 authenticated_id = originator_login;
4927 /* Trusted callers are always permitted to specify the sender address.
4928 Untrusted callers may specify it if it matches untrusted_set_sender, or if what
4929 is specified is the empty address. However, if a trusted caller does not
4930 specify a sender address for SMTP input, we leave sender_address unset. This
4931 causes the MAIL commands to be honoured. */
4933 if ( !smtp_input && !sender_address
4934 || !receive_check_set_sender(sender_address))
4936 /* Either the caller is not permitted to set a general sender, or this is
4937 non-SMTP input and the trusted caller has not set a sender. If there is no
4938 sender, or if a sender other than <> is set, override with the originator's
4939 login (which will get qualified below), except when checking things. */
4941 if ( !sender_address /* No sender_address set */
4943 (sender_address[0] != 0 && /* Non-empty sender address, AND */
4944 !checking)) /* Not running tests, including filter tests */
4946 sender_address = originator_login;
4947 f.sender_address_forced = FALSE;
4948 sender_address_domain = 0;
4952 /* Remember whether an untrusted caller set the sender address */
4954 f.sender_set_untrusted = sender_address != originator_login && !f.trusted_caller;
4956 /* Ensure that the sender address is fully qualified unless it is the empty
4957 address, which indicates an error message, or doesn't exist (root caller, smtp
4958 interface, no -f argument). */
4960 if (sender_address && *sender_address && sender_address_domain == 0)
4961 sender_address = string_sprintf("%s@%s", local_part_quote(sender_address),
4962 qualify_domain_sender);
4964 DEBUG(D_receive) debug_printf("sender address = %s\n", sender_address);
4966 /* Handle a request to verify a list of addresses, or test them for delivery.
4967 This must follow the setting of the sender address, since routers can be
4968 predicated upon the sender. If no arguments are given, read addresses from
4969 stdin. Set debug_level to at least D_v to get full output for address testing.
4972 if (verify_address_mode || f.address_test_mode)
4975 int flags = vopt_qualify;
4977 if (verify_address_mode)
4979 if (!verify_as_sender) flags |= vopt_is_recipient;
4980 DEBUG(D_verify) debug_print_ids(US"Verifying:");
4985 flags |= vopt_is_recipient;
4986 debug_selector |= D_v;
4987 debug_file = stderr;
4988 debug_fd = fileno(debug_file);
4989 DEBUG(D_verify) debug_print_ids(US"Address testing:");
4992 if (recipients_arg < argc)
4993 while (recipients_arg < argc)
4995 /* Supplied addresses are tainted since they come from a user */
4996 uschar * s = string_copy_taint(argv[recipients_arg++], TRUE);
4999 BOOL finished = FALSE;
5000 uschar *ss = parse_find_address_end(s, FALSE);
5001 if (*ss == ',') *ss = 0; else finished = TRUE;
5002 test_address(s, flags, &exit_value);
5005 while (*++s == ',' || isspace(*s)) ;
5011 uschar * s = get_stdinput(NULL, NULL);
5013 test_address(string_copy_taint(s, TRUE), flags, &exit_value);
5017 exim_exit(exit_value);
5020 /* Handle expansion checking. Either expand items on the command line, or read
5021 from stdin if there aren't any. If -Mset was specified, load the message so
5022 that its variables can be used, but restrict this facility to admin users.
5023 Otherwise, if -bem was used, read a message from stdin. */
5027 dns_init(FALSE, FALSE, FALSE);
5028 if (msg_action_arg > 0 && msg_action == MSG_LOAD)
5030 uschar spoolname[256]; /* Not big_buffer; used in spool_read_header() */
5032 exim_fail("exim: permission denied\n");
5033 message_id = argv[msg_action_arg];
5034 (void)string_format(spoolname, sizeof(spoolname), "%s-H", message_id);
5035 if ((deliver_datafile = spool_open_datafile(message_id)) < 0)
5036 printf ("Failed to load message datafile %s\n", message_id);
5037 if (spool_read_header(spoolname, TRUE, FALSE) != spool_read_OK)
5038 printf ("Failed to load message %s\n", message_id);
5041 /* Read a test message from a file. We fudge it up to be on stdin, saving
5042 stdin itself for later reading of expansion strings. */
5044 else if (expansion_test_message)
5046 int save_stdin = dup(0);
5047 int fd = Uopen(expansion_test_message, O_RDONLY, 0);
5049 exim_fail("exim: failed to open %s: %s\n", expansion_test_message,
5052 filter_test = FTEST_USER; /* Fudge to make it look like filter test */
5053 message_ended = END_NOTENDED;
5054 read_message_body(receive_msg(extract_recipients));
5055 message_linecount += body_linecount;
5056 (void)dup2(save_stdin, 0);
5057 (void)close(save_stdin);
5058 clearerr(stdin); /* Required by Darwin */
5061 /* Only admin users may see config-file macros this way */
5063 if (!f.admin_user) macros_user = macros = mlast = NULL;
5065 /* Allow $recipients for this testing */
5067 f.enable_dollar_recipients = TRUE;
5069 /* Expand command line items */
5071 if (recipients_arg < argc)
5072 while (recipients_arg < argc)
5073 expansion_test_line(argv[recipients_arg++]);
5079 char *(*fn_readline)(const char *) = NULL;
5080 void (*fn_addhist)(const char *) = NULL;
5084 void *dlhandle = set_readline(&fn_readline, &fn_addhist);
5087 while (s = get_stdinput(fn_readline, fn_addhist))
5088 expansion_test_line(s);
5091 if (dlhandle) dlclose(dlhandle);
5095 /* The data file will be open after -Mset */
5097 if (deliver_datafile >= 0)
5099 (void)close(deliver_datafile);
5100 deliver_datafile = -1;
5103 exim_exit(EXIT_SUCCESS);
5107 /* The active host name is normally the primary host name, but it can be varied
5108 for hosts that want to play several parts at once. We need to ensure that it is
5109 set for host checking, and for receiving messages. */
5111 smtp_active_hostname = primary_hostname;
5112 if (raw_active_hostname != NULL)
5114 uschar *nah = expand_string(raw_active_hostname);
5117 if (!f.expand_string_forcedfail)
5118 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to expand \"%s\" "
5119 "(smtp_active_hostname): %s", raw_active_hostname,
5120 expand_string_message);
5122 else if (nah[0] != 0) smtp_active_hostname = nah;
5125 /* Handle host checking: this facility mocks up an incoming SMTP call from a
5126 given IP address so that the blocking and relay configuration can be tested.
5127 Unless a sender_ident was set by -oMt, we discard it (the default is the
5128 caller's login name). An RFC 1413 call is made only if we are running in the
5129 test harness and an incoming interface and both ports are specified, because
5130 there is no TCP/IP call to find the ident for. */
5137 if (!sender_ident_set)
5139 sender_ident = NULL;
5140 if (f.running_in_test_harness && sender_host_port
5141 && interface_address && interface_port)
5142 verify_get_ident(1223); /* note hardwired port number */
5145 /* In case the given address is a non-canonical IPv6 address, canonicalize
5146 it. The code works for both IPv4 and IPv6, as it happens. */
5148 size = host_aton(sender_host_address, x);
5149 sender_host_address = store_get(48, FALSE); /* large enough for full IPv6 */
5150 (void)host_nmtoa(size, x, -1, sender_host_address, ':');
5152 /* Now set up for testing */
5154 host_build_sender_fullhost();
5158 f.sender_local = FALSE;
5159 f.sender_host_notsocket = TRUE;
5160 debug_file = stderr;
5161 debug_fd = fileno(debug_file);
5162 fprintf(stdout, "\n**** SMTP testing session as if from host %s\n"
5163 "**** but without any ident (RFC 1413) callback.\n"
5164 "**** This is not for real!\n\n",
5165 sender_host_address);
5167 memset(sender_host_cache, 0, sizeof(sender_host_cache));
5168 if (verify_check_host(&hosts_connection_nolog) == OK)
5169 BIT_CLEAR(log_selector, log_selector_size, Li_smtp_connection);
5170 log_write(L_smtp_connection, LOG_MAIN, "%s", smtp_get_connection_info());
5172 /* NOTE: We do *not* call smtp_log_no_mail() if smtp_start_session() fails,
5173 because a log line has already been written for all its failure exists
5174 (usually "connection refused: <reason>") and writing another one is
5175 unnecessary clutter. */
5177 if (smtp_start_session())
5180 for (; (reset_point = store_mark()); store_reset(reset_point))
5182 if (smtp_setup_msg() <= 0) break;
5183 if (!receive_msg(FALSE)) break;
5185 return_path = sender_address = NULL;
5186 dnslist_domain = dnslist_matched = NULL;
5187 #ifndef DISABLE_DKIM
5188 dkim_cur_signer = NULL;
5191 deliver_localpart_orig = NULL;
5192 deliver_domain_orig = NULL;
5193 callout_address = sending_ip_address = NULL;
5194 deliver_localpart_data = deliver_domain_data =
5195 recipient_data = sender_data = NULL;
5196 sender_rate = sender_rate_limit = sender_rate_period = NULL;
5200 exim_exit(EXIT_SUCCESS);
5204 /* Arrange for message reception if recipients or SMTP were specified;
5205 otherwise complain unless a version print (-bV) happened or this is a filter
5206 verification test or info dump.
5207 In the former case, show the configuration file name. */
5209 if (recipients_arg >= argc && !extract_recipients && !smtp_input)
5211 if (version_printed)
5213 if (Ustrchr(config_main_filelist, ':'))
5214 printf("Configuration file search path is %s\n", config_main_filelist);
5215 printf("Configuration file is %s\n", config_main_filename);
5216 return EXIT_SUCCESS;
5219 if (info_flag != CMDINFO_NONE)
5221 show_exim_information(info_flag, info_stdout ? stdout : stderr);
5222 return info_stdout ? EXIT_SUCCESS : EXIT_FAILURE;
5225 if (filter_test == FTEST_NONE)
5226 exim_usage(called_as);
5230 /* If mua_wrapper is set, Exim is being used to turn an MUA that submits on the
5231 standard input into an MUA that submits to a smarthost over TCP/IP. We know
5232 that we are not called from inetd, because that is rejected above. The
5233 following configuration settings are forced here:
5235 (1) Synchronous delivery (-odi)
5236 (2) Errors to stderr (-oep == -oeq)
5237 (3) No parallel remote delivery
5238 (4) Unprivileged delivery
5240 We don't force overall queueing options because there are several of them;
5241 instead, queueing is avoided below when mua_wrapper is set. However, we do need
5242 to override any SMTP queueing. */
5246 f.synchronous_delivery = TRUE;
5247 arg_error_handling = ERRORS_STDERR;
5248 remote_max_parallel = 1;
5249 deliver_drop_privilege = TRUE;
5250 f.queue_smtp = FALSE;
5251 queue_smtp_domains = NULL;
5253 message_utf8_downconvert = -1; /* convert-if-needed */
5258 /* Prepare to accept one or more new messages on the standard input. When a
5259 message has been read, its id is returned in message_id[]. If doing immediate
5260 delivery, we fork a delivery process for each received message, except for the
5261 last one, where we can save a process switch.
5263 It is only in non-smtp mode that error_handling is allowed to be changed from
5264 its default of ERRORS_SENDER by argument. (Idle thought: are any of the
5265 sendmail error modes other than -oem ever actually used? Later: yes.) */
5267 if (!smtp_input) error_handling = arg_error_handling;
5269 /* If this is an inetd call, ensure that stderr is closed to prevent panic
5270 logging being sent down the socket and make an identd call to get the
5273 else if (f.is_inetd)
5275 (void)fclose(stderr);
5276 exim_nullstd(); /* Re-open to /dev/null */
5277 verify_get_ident(IDENT_PORT);
5278 host_build_sender_fullhost();
5279 set_process_info("handling incoming connection from %s via inetd",
5283 /* If the sender host address has been set, build sender_fullhost if it hasn't
5284 already been done (which it will have been for inetd). This caters for the
5285 case when it is forced by -oMa. However, we must flag that it isn't a socket,
5286 so that the test for IP options is skipped for -bs input. */
5288 if (sender_host_address && !sender_fullhost)
5290 host_build_sender_fullhost();
5291 set_process_info("handling incoming connection from %s via -oMa",
5293 f.sender_host_notsocket = TRUE;
5296 /* Otherwise, set the sender host as unknown except for inetd calls. This
5297 prevents host checking in the case of -bs not from inetd and also for -bS. */
5299 else if (!f.is_inetd) f.sender_host_unknown = TRUE;
5301 /* If stdout does not exist, then dup stdin to stdout. This can happen
5302 if exim is started from inetd. In this case fd 0 will be set to the socket,
5303 but fd 1 will not be set. This also happens for passed SMTP channels. */
5305 if (fstat(1, &statbuf) < 0) (void)dup2(0, 1);
5307 /* Set up the incoming protocol name and the state of the program. Root is
5308 allowed to force received protocol via the -oMr option above. If we have come
5309 via inetd, the process info has already been set up. We don't set
5310 received_protocol here for smtp input, as it varies according to
5311 batch/HELO/EHLO/AUTH/TLS. */
5315 if (!f.is_inetd) set_process_info("accepting a local %sSMTP message from <%s>",
5316 smtp_batched_input? "batched " : "",
5317 (sender_address!= NULL)? sender_address : originator_login);
5321 int old_pool = store_pool;
5322 store_pool = POOL_PERM;
5323 if (!received_protocol)
5324 received_protocol = string_sprintf("local%s", called_as);
5325 store_pool = old_pool;
5326 set_process_info("accepting a local non-SMTP message from <%s>",
5330 /* Initialize the session_local_queue-only flag (this will be ignored if
5331 mua_wrapper is set) */
5334 session_local_queue_only = queue_only;
5336 /* For non-SMTP and for batched SMTP input, check that there is enough space on
5337 the spool if so configured. On failure, we must not attempt to send an error
5338 message! (For interactive SMTP, the check happens at MAIL FROM and an SMTP
5339 error code is given.) */
5341 if ((!smtp_input || smtp_batched_input) && !receive_check_fs(0))
5342 exim_fail("exim: insufficient disk space\n");
5344 /* If this is smtp input of any kind, real or batched, handle the start of the
5347 NOTE: We do *not* call smtp_log_no_mail() if smtp_start_session() fails,
5348 because a log line has already been written for all its failure exists
5349 (usually "connection refused: <reason>") and writing another one is
5350 unnecessary clutter. */
5356 memset(sender_host_cache, 0, sizeof(sender_host_cache));
5357 if (verify_check_host(&hosts_connection_nolog) == OK)
5358 BIT_CLEAR(log_selector, log_selector_size, Li_smtp_connection);
5359 log_write(L_smtp_connection, LOG_MAIN, "%s", smtp_get_connection_info());
5360 if (!smtp_start_session())
5363 exim_exit(EXIT_SUCCESS);
5367 /* Otherwise, set up the input size limit here. */
5371 thismessage_size_limit = expand_string_integer(message_size_limit, TRUE);
5372 if (expand_string_message)
5373 if (thismessage_size_limit == -1)
5374 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to expand "
5375 "message_size_limit: %s", expand_string_message);
5377 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "invalid value for "
5378 "message_size_limit: %s", expand_string_message);
5381 /* Loop for several messages when reading SMTP input. If we fork any child
5382 processes, we don't want to wait for them unless synchronous delivery is
5383 requested, so set SIGCHLD to SIG_IGN in that case. This is not necessarily the
5384 same as SIG_DFL, despite the fact that documentation often lists the default as
5385 "ignore". This is a confusing area. This is what I know:
5387 At least on some systems (e.g. Solaris), just setting SIG_IGN causes child
5388 processes that complete simply to go away without ever becoming defunct. You
5389 can't then wait for them - but we don't want to wait for them in the
5390 non-synchronous delivery case. However, this behaviour of SIG_IGN doesn't
5391 happen for all OS (e.g. *BSD is different).
5393 But that's not the end of the story. Some (many? all?) systems have the
5394 SA_NOCLDWAIT option for sigaction(). This requests the behaviour that Solaris
5395 has by default, so it seems that the difference is merely one of default
5396 (compare restarting vs non-restarting signals).
5398 To cover all cases, Exim sets SIG_IGN with SA_NOCLDWAIT here if it can. If not,
5399 it just sets SIG_IGN. To be on the safe side it also calls waitpid() at the end
5400 of the loop below. Paranoia rules.
5402 February 2003: That's *still* not the end of the story. There are now versions
5403 of Linux (where SIG_IGN does work) that are picky. If, having set SIG_IGN, a
5404 process then calls waitpid(), a grumble is written to the system log, because
5405 this is logically inconsistent. In other words, it doesn't like the paranoia.
5406 As a consequence of this, the waitpid() below is now excluded if we are sure
5407 that SIG_IGN works. */
5409 if (!f.synchronous_delivery)
5412 struct sigaction act;
5413 act.sa_handler = SIG_IGN;
5414 sigemptyset(&(act.sa_mask));
5415 act.sa_flags = SA_NOCLDWAIT;
5416 sigaction(SIGCHLD, &act, NULL);
5418 signal(SIGCHLD, SIG_IGN);
5422 /* Save the current store pool point, for resetting at the start of
5423 each message, and save the real sender address, if any. */
5425 real_sender_address = sender_address;
5427 /* Loop to receive messages; receive_msg() returns TRUE if there are more
5428 messages to be read (SMTP input), or FALSE otherwise (not SMTP, or SMTP channel
5433 rmark reset_point = store_mark();
5436 /* Handle the SMTP case; call smtp_setup_mst() to deal with the initial SMTP
5437 input and build the recipients list, before calling receive_msg() to read the
5438 message proper. Whatever sender address is given in the SMTP transaction is
5439 often ignored for local senders - we use the actual sender, which is normally
5440 either the underlying user running this process or a -f argument provided by
5441 a trusted caller. It is saved in real_sender_address. The test for whether to
5442 accept the SMTP sender is encapsulated in receive_check_set_sender(). */
5447 if ((rc = smtp_setup_msg()) > 0)
5449 if (real_sender_address != NULL &&
5450 !receive_check_set_sender(sender_address))
5452 sender_address = raw_sender = real_sender_address;
5453 sender_address_unrewritten = NULL;
5456 /* For batched SMTP, we have to run the acl_not_smtp_start ACL, since it
5457 isn't really SMTP, so no other ACL will run until the acl_not_smtp one at
5458 the very end. The result of the ACL is ignored (as for other non-SMTP
5459 messages). It is run for its potential side effects. */
5461 if (smtp_batched_input && acl_not_smtp_start != NULL)
5463 uschar *user_msg, *log_msg;
5464 f.enable_dollar_recipients = TRUE;
5465 (void)acl_check(ACL_WHERE_NOTSMTP_START, NULL, acl_not_smtp_start,
5466 &user_msg, &log_msg);
5467 f.enable_dollar_recipients = FALSE;
5470 /* Now get the data for the message */
5472 more = receive_msg(extract_recipients);
5473 if (message_id[0] == 0)
5475 cancel_cutthrough_connection(TRUE, US"receive dropped");
5476 if (more) goto moreloop;
5477 smtp_log_no_mail(); /* Log no mail if configured */
5478 exim_exit(EXIT_FAILURE);
5483 cancel_cutthrough_connection(TRUE, US"message setup dropped");
5484 smtp_log_no_mail(); /* Log no mail if configured */
5485 exim_exit(rc ? EXIT_FAILURE : EXIT_SUCCESS);
5489 /* In the non-SMTP case, we have all the information from the command
5490 line, but must process it in case it is in the more general RFC822
5491 format, and in any case, to detect syntax errors. Also, it appears that
5492 the use of comma-separated lists as single arguments is common, so we
5493 had better support them. */
5498 int count = argc - recipients_arg;
5499 uschar **list = argv + recipients_arg;
5501 /* These options cannot be changed dynamically for non-SMTP messages */
5503 f.active_local_sender_retain = local_sender_retain;
5504 f.active_local_from_check = local_from_check;
5506 /* Save before any rewriting */
5508 raw_sender = string_copy(sender_address);
5510 /* Loop for each argument (supplied by user hence tainted) */
5512 for (int i = 0; i < count; i++)
5514 int start, end, domain;
5516 uschar * s = string_copy_taint(list[i], TRUE);
5518 /* Loop for each comma-separated address */
5522 BOOL finished = FALSE;
5524 uschar *ss = parse_find_address_end(s, FALSE);
5526 if (*ss == ',') *ss = 0; else finished = TRUE;
5528 /* Check max recipients - if -t was used, these aren't recipients */
5530 if (recipients_max > 0 && ++rcount > recipients_max &&
5531 !extract_recipients)
5532 if (error_handling == ERRORS_STDERR)
5534 fprintf(stderr, "exim: too many recipients\n");
5535 exim_exit(EXIT_FAILURE);
5539 moan_to_sender(ERRMESS_TOOMANYRECIP, NULL, NULL, stdin, TRUE)?
5540 errors_sender_rc : EXIT_FAILURE;
5544 BOOL b = allow_utf8_domains;
5545 allow_utf8_domains = TRUE;
5548 parse_extract_address(s, &errmess, &start, &end, &domain, FALSE);
5551 if (string_is_utf8(recipient))
5552 message_smtputf8 = TRUE;
5554 allow_utf8_domains = b;
5557 if (domain == 0 && !f.allow_unqualified_recipient)
5560 errmess = US"unqualified recipient address not allowed";
5564 if (error_handling == ERRORS_STDERR)
5566 fprintf(stderr, "exim: bad recipient address \"%s\": %s\n",
5567 string_printing(list[i]), errmess);
5568 exim_exit(EXIT_FAILURE);
5574 eblock.text1 = string_printing(list[i]);
5575 eblock.text2 = errmess;
5577 moan_to_sender(ERRMESS_BADARGADDRESS, &eblock, NULL, stdin, TRUE)?
5578 errors_sender_rc : EXIT_FAILURE;
5581 receive_add_recipient(string_copy_taint(recipient, TRUE), -1);
5584 while (*(++s) != 0 && (*s == ',' || isspace(*s)));
5588 /* Show the recipients when debugging */
5592 if (sender_address) debug_printf("Sender: %s\n", sender_address);
5593 if (recipients_list)
5595 debug_printf("Recipients:\n");
5596 for (int i = 0; i < recipients_count; i++)
5597 debug_printf(" %s\n", recipients_list[i].address);
5601 /* Run the acl_not_smtp_start ACL if required. The result of the ACL is
5602 ignored; rejecting here would just add complication, and it can just as
5603 well be done later. Allow $recipients to be visible in the ACL. */
5605 if (acl_not_smtp_start)
5607 uschar *user_msg, *log_msg;
5608 f.enable_dollar_recipients = TRUE;
5609 (void)acl_check(ACL_WHERE_NOTSMTP_START, NULL, acl_not_smtp_start,
5610 &user_msg, &log_msg);
5611 f.enable_dollar_recipients = FALSE;
5614 /* Pause for a while waiting for input. If none received in that time,
5615 close the logfile, if we had one open; then if we wait for a long-running
5616 datasource (months, in one use-case) log rotation will not leave us holding
5619 if (!receive_timeout)
5621 struct timeval t = { .tv_sec = 30*60, .tv_usec = 0 }; /* 30 minutes */
5624 FD_ZERO(&r); FD_SET(0, &r);
5625 if (select(1, &r, NULL, NULL, &t) == 0) mainlog_close();
5628 /* Read the data for the message. If filter_test is not FTEST_NONE, this
5629 will just read the headers for the message, and not write anything onto the
5632 message_ended = END_NOTENDED;
5633 more = receive_msg(extract_recipients);
5635 /* more is always FALSE here (not SMTP message) when reading a message
5636 for real; when reading the headers of a message for filter testing,
5637 it is TRUE if the headers were terminated by '.' and FALSE otherwise. */
5639 if (message_id[0] == 0) exim_exit(EXIT_FAILURE);
5640 } /* Non-SMTP message reception */
5642 /* If this is a filter testing run, there are headers in store, but
5643 no message on the spool. Run the filtering code in testing mode, setting
5644 the domain to the qualify domain and the local part to the current user,
5645 unless they have been set by options. The prefix and suffix are left unset
5646 unless specified. The the return path is set to to the sender unless it has
5647 already been set from a return-path header in the message. */
5649 if (filter_test != FTEST_NONE)
5651 deliver_domain = ftest_domain ? ftest_domain : qualify_domain_recipient;
5652 deliver_domain_orig = deliver_domain;
5653 deliver_localpart = ftest_localpart ? ftest_localpart : originator_login;
5654 deliver_localpart_orig = deliver_localpart;
5655 deliver_localpart_prefix = ftest_prefix;
5656 deliver_localpart_suffix = ftest_suffix;
5657 deliver_home = originator_home;
5661 printf("Return-path copied from sender\n");
5662 return_path = string_copy(sender_address);
5665 printf("Return-path = %s\n", (return_path[0] == 0)? US"<>" : return_path);
5666 printf("Sender = %s\n", (sender_address[0] == 0)? US"<>" : sender_address);
5668 receive_add_recipient(
5669 string_sprintf("%s%s%s@%s",
5670 ftest_prefix ? ftest_prefix : US"",
5672 ftest_suffix ? ftest_suffix : US"",
5673 deliver_domain), -1);
5675 printf("Recipient = %s\n", recipients_list[0].address);
5676 if (ftest_prefix) printf("Prefix = %s\n", ftest_prefix);
5677 if (ftest_suffix) printf("Suffix = %s\n", ftest_suffix);
5679 if (chdir("/")) /* Get away from wherever the user is running this from */
5681 DEBUG(D_receive) debug_printf("chdir(\"/\") failed\n");
5682 exim_exit(EXIT_FAILURE);
5685 /* Now we run either a system filter test, or a user filter test, or both.
5686 In the latter case, headers added by the system filter will persist and be
5687 available to the user filter. We need to copy the filter variables
5690 if (filter_test & FTEST_SYSTEM)
5691 if (!filter_runtest(filter_sfd, filter_test_sfile, TRUE, more))
5692 exim_exit(EXIT_FAILURE);
5694 memcpy(filter_sn, filter_n, sizeof(filter_sn));
5696 if (filter_test & FTEST_USER)
5697 if (!filter_runtest(filter_ufd, filter_test_ufile, FALSE, more))
5698 exim_exit(EXIT_FAILURE);
5700 exim_exit(EXIT_SUCCESS);
5703 /* Else act on the result of message reception. We should not get here unless
5704 message_id[0] is non-zero. If queue_only is set, session_local_queue_only
5705 will be TRUE. If it is not, check on the number of messages received in this
5708 if ( !session_local_queue_only
5709 && smtp_accept_queue_per_connection > 0
5710 && receive_messagecount > smtp_accept_queue_per_connection)
5712 session_local_queue_only = TRUE;
5713 queue_only_reason = 2;
5716 /* Initialize local_queue_only from session_local_queue_only. If it is false,
5717 and queue_only_load is set, check that the load average is below it. If it is
5718 not, set local_queue_only TRUE. If queue_only_load_latch is true (the
5719 default), we put the whole session into queue_only mode. It then remains this
5720 way for any subsequent messages on the same SMTP connection. This is a
5721 deliberate choice; even though the load average may fall, it doesn't seem
5722 right to deliver later messages on the same call when not delivering earlier
5723 ones. However, there are odd cases where this is not wanted, so this can be
5724 changed by setting queue_only_load_latch false. */
5726 if (!(local_queue_only = session_local_queue_only) && queue_only_load >= 0)
5727 if ((local_queue_only = (load_average = OS_GETLOADAVG()) > queue_only_load))
5729 queue_only_reason = 3;
5730 if (queue_only_load_latch) session_local_queue_only = TRUE;
5733 /* If running as an MUA wrapper, all queueing options and freezing options
5737 local_queue_only = f.queue_only_policy = f.deliver_freeze = FALSE;
5739 /* Log the queueing here, when it will get a message id attached, but
5740 not if queue_only is set (case 0). Case 1 doesn't happen here (too many
5743 if (local_queue_only)
5745 cancel_cutthrough_connection(TRUE, US"no delivery; queueing");
5746 switch(queue_only_reason)
5749 log_write(L_delay_delivery,
5750 LOG_MAIN, "no immediate delivery: more than %d messages "
5751 "received in one connection", smtp_accept_queue_per_connection);
5755 log_write(L_delay_delivery,
5756 LOG_MAIN, "no immediate delivery: load average %.2f",
5757 (double)load_average/1000.0);
5762 else if (f.queue_only_policy || f.deliver_freeze)
5763 cancel_cutthrough_connection(TRUE, US"no delivery; queueing");
5765 /* Else do the delivery unless the ACL or local_scan() called for queue only
5766 or froze the message. Always deliver in a separate process. A fork failure is
5767 not a disaster, as the delivery will eventually happen on a subsequent queue
5768 run. The search cache must be tidied before the fork, as the parent will
5769 do it before exiting. The child will trigger a lookup failure and
5770 thereby defer the delivery if it tries to use (for example) a cached ldap
5771 connection that the parent has called unbind on. */
5778 if ((pid = exim_fork(US"local-accept-delivery")) == 0)
5781 close_unwanted(); /* Close unwanted file descriptors and TLS */
5782 exim_nullstd(); /* Ensure std{in,out,err} exist */
5784 /* Re-exec Exim if we need to regain privilege (note: in mua_wrapper
5785 mode, deliver_drop_privilege is forced TRUE). */
5787 if (geteuid() != root_uid && !deliver_drop_privilege && !unprivileged)
5789 delivery_re_exec(CEE_EXEC_EXIT);
5790 /* Control does not return here. */
5793 /* No need to re-exec */
5795 rc = deliver_message(message_id, FALSE, FALSE);
5797 exim_underbar_exit(!mua_wrapper || rc == DELIVER_MUA_SUCCEEDED
5798 ? EXIT_SUCCESS : EXIT_FAILURE);
5803 cancel_cutthrough_connection(TRUE, US"delivery fork failed");
5804 log_write(0, LOG_MAIN|LOG_PANIC, "failed to fork automatic delivery "
5805 "process: %s", strerror(errno));
5809 release_cutthrough_connection(US"msg passed for delivery");
5811 /* In the parent, wait if synchronous delivery is required. This will
5812 always be the case in MUA wrapper mode. */
5814 if (f.synchronous_delivery)
5817 while (wait(&status) != pid);
5818 if ((status & 0x00ff) != 0)
5819 log_write(0, LOG_MAIN|LOG_PANIC,
5820 "process %d crashed with signal %d while delivering %s",
5821 (int)pid, status & 0x00ff, message_id);
5822 if (mua_wrapper && (status & 0xffff) != 0) exim_exit(EXIT_FAILURE);
5827 /* The loop will repeat if more is TRUE. If we do not know know that the OS
5828 automatically reaps children (see comments above the loop), clear away any
5829 finished subprocesses here, in case there are lots of messages coming in
5830 from the same source. */
5832 #ifndef SIG_IGN_WORKS
5833 while (waitpid(-1, NULL, WNOHANG) > 0);
5837 return_path = sender_address = NULL;
5838 authenticated_sender = NULL;
5839 deliver_localpart_orig = NULL;
5840 deliver_domain_orig = NULL;
5841 deliver_host = deliver_host_address = NULL;
5842 dnslist_domain = dnslist_matched = NULL;
5843 #ifdef WITH_CONTENT_SCAN
5844 malware_name = NULL;
5846 callout_address = NULL;
5847 sending_ip_address = NULL;
5848 deliver_localpart_data = deliver_domain_data =
5849 recipient_data = sender_data = NULL;
5851 for(int i = 0; i < REGEX_VARS; i++) regex_vars[i] = NULL;
5853 store_reset(reset_point);
5856 exim_exit(EXIT_SUCCESS); /* Never returns */
5857 return 0; /* To stop compiler warning */