1 /*************************************************
2 * Exim - an Internet mail transport agent *
3 *************************************************/
5 /* Copyright (c) The Exim Maintainers 2020 - 2024 */
6 /* Copyright (c) University of Cambridge 1995 - 2018 */
7 /* See the file NOTICE for conditions of use and distribution. */
8 /* SPDX-License-Identifier: GPL-2.0-or-later */
11 /* The main function: entry point, initialization, and high-level control.
12 Also a few functions that don't naturally fit elsewhere. */
17 #if defined(__GLIBC__) && !defined(__UCLIBC__)
18 # include <gnu/libc-version.h>
25 # include <execinfo.h>
29 # include <gnutls/gnutls.h>
30 # if GNUTLS_VERSION_NUMBER < 0x030103 && !defined(DISABLE_OCSP)
35 extern void init_lookup_list(void);
36 extern void init_misc_mod_list(void);
40 /*************************************************
41 * Function interface to store functions *
42 *************************************************/
44 /* We need some real functions to pass to the PCRE regular expression library
45 for store allocation via Exim's store manager. The normal calls are actually
46 macros that pass over location information to make tracing easier. These
47 functions just interface to the standard macro calls. A good compiler will
48 optimize out the tail recursion and so not make them too expensive. */
51 function_store_malloc(PCRE2_SIZE size, void * tag)
54 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "excessive memory alloc request");
55 return store_malloc((int)size);
59 function_store_free(void * block, void * tag)
61 /* At least some version of pcre2 pass a null pointer */
62 if (block) store_free(block);
67 function_store_get(PCRE2_SIZE size, void * tag)
70 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "excessive memory alloc request");
71 return store_get((int)size, GET_UNTAINTED); /* loses track of taint */
75 function_store_nullfree(void * block, void * tag)
77 /* We cannot free memory allocated using store_get() */
83 /*************************************************
84 * Enums for cmdline interface *
85 *************************************************/
87 enum commandline_info { CMDINFO_NONE=0,
88 CMDINFO_HELP, CMDINFO_SIEVE, CMDINFO_DSCP };
96 pcre_mlc_ctx = pcre2_general_context_create(function_store_malloc, function_store_free, NULL);
97 pcre_gen_ctx = pcre2_general_context_create(function_store_get, function_store_nullfree, NULL);
99 pcre_mlc_cmp_ctx = pcre2_compile_context_create(pcre_mlc_ctx);
100 pcre_gen_cmp_ctx = pcre2_compile_context_create(pcre_gen_ctx);
102 pcre_gen_mtc_ctx = pcre2_match_context_create(pcre_gen_ctx);
108 /*************************************************
109 * Execute regular expression and set strings *
110 *************************************************/
112 /* This function runs a regular expression match, and sets up the pointers to
113 the matched substrings. The matched strings are copied so the lifetime of
114 the subject is not a problem. Matched strings will have the same taint status
115 as the subject string (this is not a de-taint method, and must not be made so
116 given the support for wildcards in REs).
119 re the compiled expression
120 subject the subject string
121 options additional PCRE options
122 setup if < 0 do full setup
123 if >= 0 setup from setup+1 onwards,
124 excluding the full matched string
126 Returns: TRUE if matched, or FALSE
130 regex_match_and_setup(const pcre2_code * re, const uschar * subject, int options, int setup)
132 pcre2_match_data * md = pcre2_match_data_create_from_pattern(re, pcre_gen_ctx);
133 int res = pcre2_match(re, (PCRE2_SPTR)subject, PCRE2_ZERO_TERMINATED, 0,
134 PCRE_EOPT | options, md, pcre_gen_mtc_ctx);
137 if ((yield = (res >= 0)))
139 PCRE2_SIZE * ovec = pcre2_get_ovector_pointer(md);
140 res = pcre2_get_ovector_count(md);
141 expand_nmax = setup < 0 ? 0 : setup + 1;
142 for (int matchnum = setup < 0 ? 0 : 1; matchnum < res; matchnum++)
144 /* Although PCRE2 has a pcre2_substring_get_bynumber() conveneience, it
145 seems to return a bad pointer when a capture group had no data, eg. (.*)
146 matching zero letters. So use the underlying ovec and hope (!) that the
147 offsets are sane (including that case). Should we go further and range-
148 check each one vs. the subject string length? */
149 int off = matchnum * 2;
150 int len = ovec[off + 1] - ovec[off];
151 expand_nstring[expand_nmax] = string_copyn(subject + ovec[off], len);
152 expand_nlength[expand_nmax++] = len;
156 else if (res != PCRE2_ERROR_NOMATCH) DEBUG(D_any)
159 pcre2_get_error_message(res, errbuf, sizeof(errbuf));
160 debug_printf_indent("pcre2: %s\n", errbuf);
162 /* pcre2_match_data_free(md); gen ctx needs no free */
167 /* Check just for match with regex. Uses the common memory-handling.
171 subject string to be checked
172 slen length of subject; -1 for nul-terminated
173 rptr pointer for matched string, copied, or NULL
175 Return: TRUE for a match.
179 regex_match(const pcre2_code * re, const uschar * subject, int slen, uschar ** rptr)
181 pcre2_match_data * md = pcre2_match_data_create(1, pcre_gen_ctx);
182 int rc = pcre2_match(re, (PCRE2_SPTR)subject,
183 slen >= 0 ? slen : PCRE2_ZERO_TERMINATED,
184 0, PCRE_EOPT, md, pcre_gen_mtc_ctx);
185 PCRE2_SIZE * ovec = pcre2_get_ovector_pointer(md);
191 *rptr = string_copyn(subject + ovec[0], ovec[1] - ovec[0]);
194 /* pcre2_match_data_free(md); gen ctx needs no free */
200 /*************************************************
201 * Set up processing details *
202 *************************************************/
204 /* Save a text string for dumping when SIGUSR1 is received.
205 Do checks for overruns.
207 Arguments: format and arguments, as for printf()
212 set_process_info(const char * format, ...)
214 gstring gs = { .size = PROCESS_INFO_SIZE - 2, .ptr = 0, .s = process_info };
220 g = string_fmt_append(&gs, "%5d ", (int)getpid());
221 len = gstring_length(g);
222 va_start(ap, format);
223 if (!string_vformat(g, 0, format, ap))
226 g = string_cat(&gs, US"**** string overflowed buffer ****");
228 g = string_catn(g, US"\n", 1);
229 process_info_len = len_string_from_gstring(g, &s);
230 DEBUG(D_process_info) debug_printf("set_process_info: %s", process_info);
234 /***********************************************
235 * Handler for SIGTERM *
236 ***********************************************/
239 term_handler(int sig)
241 exim_exit(EXIT_FAILURE);
245 /***********************************************
246 * Handler for SIGSEGV *
247 ***********************************************/
249 #define STACKDUMP_MAX 24
254 void * buf[STACKDUMP_MAX];
256 int nptrs = backtrace(buf, STACKDUMP_MAX);
258 log_write(0, LOG_MAIN|LOG_PANIC, "backtrace");
259 log_write(0, LOG_MAIN|LOG_PANIC, "---");
261 /* This function is officially not callable from a signal handler, as it
262 calls malloc() for the returned data. However, it seems to work - and we
263 know we're going on to crash anyway - so just hold our noses and do it.
264 A alternative might be backtrace_symbols_fd(). */
266 if ((ss = backtrace_symbols(buf, nptrs)))
268 for (int i = 0; i < nptrs; i++)
269 log_write(0, LOG_MAIN|LOG_PANIC, "\t%s", ss[i]);
273 log_write(0, LOG_MAIN|LOG_PANIC, "backtrace_symbols: %s", strerror(errno));
274 log_write(0, LOG_MAIN|LOG_PANIC, "---");
282 segv_handler(int sig, siginfo_t * info, void * uctx)
286 log_write(0, LOG_MAIN|LOG_PANIC, "SIGSEGV (fault address: %p)", info->si_addr);
287 # if defined(SEGV_MAPERR) && defined(SEGV_ACCERR) && defined(SEGV_BNDERR) && defined(SEGV_PKUERR)
288 switch (info->si_code)
290 case SEGV_MAPERR: log_write(0, LOG_MAIN|LOG_PANIC, "SEGV_MAPERR"); break;
291 case SEGV_ACCERR: log_write(0, LOG_MAIN|LOG_PANIC, "SEGV_ACCERR"); break;
292 case SEGV_BNDERR: log_write(0, LOG_MAIN|LOG_PANIC, "SEGV_BNDERR"); break;
293 case SEGV_PKUERR: log_write(0, LOG_MAIN|LOG_PANIC, "SEGV_PKUERR"); break;
298 log_write(0, LOG_MAIN|LOG_PANIC, "SIGSEGV (deliberate trap)");
299 else if (US info->si_addr < US 4096)
300 log_write(0, LOG_MAIN|LOG_PANIC, "SIGSEGV (null pointer indirection)");
302 log_write(0, LOG_MAIN|LOG_PANIC, "SIGSEGV (maybe attempt to write to immutable memory)");
303 if (process_info_len > 0)
304 log_write(0, LOG_MAIN|LOG_PANIC, "SIGSEGV (%s: %.*s)",
305 process_purpose, process_info_len, process_info);
307 signal(SIGSEGV, SIG_DFL);
312 segv_handler(int sig)
314 log_write(0, LOG_MAIN|LOG_PANIC, "SIGSEGV (maybe attempt to write to immutable memory)");
315 if (process_info_len > 0)
316 log_write(0, LOG_MAIN|LOG_PANIC, "SIGSEGV (%.*s)", process_info_len, process_info);
318 signal(SIGSEGV, SIG_DFL);
324 /*************************************************
325 * Handler for SIGUSR1 *
326 *************************************************/
328 /* SIGUSR1 causes any exim process to write to the process log details of
329 what it is currently doing. It will only be used if the OS is capable of
330 setting up a handler that causes automatic restarting of any system call
331 that is in progress at the time.
333 This function takes care to be signal-safe.
335 Argument: the signal number (SIGUSR1)
340 usr1_handler(int sig)
344 os_restarting_signal(sig, usr1_handler);
346 if (!process_log_path) return;
347 fd = log_open_as_exim(process_log_path);
349 /* If we are neither exim nor root, or if we failed to create the log file,
350 give up. There is not much useful we can do with errors, since we don't want
351 to disrupt whatever is going on outside the signal handler. */
355 (void)write(fd, process_info, process_info_len);
361 /*************************************************
363 *************************************************/
365 /* This handler is enabled most of the time that Exim is running. The handler
366 doesn't actually get used unless alarm() has been called to set a timer, to
367 place a time limit on a system call of some kind. When the handler is run, it
370 There are some other SIGALRM handlers that are used in special cases when more
371 than just a flag setting is required; for example, when reading a message's
372 input. These are normally set up in the code module that uses them, and the
373 SIGALRM handler is reset to this one afterwards.
375 Argument: the signal value (SIGALRM)
380 sigalrm_handler(int sig)
383 os_non_restarting_signal(SIGALRM, sigalrm_handler);
388 /*************************************************
389 * Sleep for a fractional time interval *
390 *************************************************/
392 /* This function is called by millisleep() and exim_wait_tick() to wait for a
393 period of time that may include a fraction of a second. The coding is somewhat
394 tedious. We do not expect setitimer() ever to fail, but if it does, the process
395 will wait for ever, so we panic in this instance. (There was a case of this
396 when a bug in a function that calls milliwait() caused it to pass invalid data.
397 That's when I added the check. :-)
399 We assume it to be not worth sleeping for under 50us; this value will
400 require revisiting as hardware advances. This avoids the issue of
401 a zero-valued timer setting meaning "never fire".
403 Argument: an itimerval structure containing the interval
408 milliwait(struct itimerval *itval)
411 sigset_t old_sigmask;
412 int save_errno = errno;
414 if (itval->it_value.tv_usec < 50 && itval->it_value.tv_sec == 0)
416 (void)sigemptyset(&sigmask); /* Empty mask */
417 (void)sigaddset(&sigmask, SIGALRM); /* Add SIGALRM */
418 (void)sigprocmask(SIG_BLOCK, &sigmask, &old_sigmask); /* Block SIGALRM */
419 if (setitimer(ITIMER_REAL, itval, NULL) < 0) /* Start timer */
420 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
421 "setitimer() failed: %s", strerror(errno));
422 (void)sigfillset(&sigmask); /* All signals */
423 (void)sigdelset(&sigmask, SIGALRM); /* Remove SIGALRM */
424 (void)sigsuspend(&sigmask); /* Until SIGALRM */
425 (void)sigprocmask(SIG_SETMASK, &old_sigmask, NULL); /* Restore mask */
427 sigalrm_seen = FALSE;
433 /*************************************************
434 * Millisecond sleep function *
435 *************************************************/
437 /* The basic sleep() function has a granularity of 1 second, which is too rough
438 in some cases - for example, when using an increasing delay to slow down
441 Argument: number of millseconds
448 struct itimerval itval = {.it_interval = {.tv_sec = 0, .tv_usec = 0},
449 .it_value = {.tv_sec = msec/1000,
450 .tv_usec = (msec % 1000) * 1000}};
456 /*************************************************
457 * Compare microsecond times *
458 *************************************************/
465 Returns: -1, 0, or +1
469 exim_tvcmp(struct timeval *t1, struct timeval *t2)
471 if (t1->tv_sec > t2->tv_sec) return +1;
472 if (t1->tv_sec < t2->tv_sec) return -1;
473 if (t1->tv_usec > t2->tv_usec) return +1;
474 if (t1->tv_usec < t2->tv_usec) return -1;
481 /*************************************************
482 * Clock tick wait function *
483 *************************************************/
485 #ifdef _POSIX_MONOTONIC_CLOCK
486 # ifdef CLOCK_BOOTTIME
487 # define EXIM_CLOCKTYPE CLOCK_BOOTTIME
489 # define EXIM_CLOCKTYPE CLOCK_MONOTONIC
492 /* Amount EXIM_CLOCK is behind realtime, at startup. */
493 static struct timespec offset_ts;
496 exim_clock_init(void)
499 if (clock_gettime(EXIM_CLOCKTYPE, &offset_ts) != 0) return;
500 (void)gettimeofday(&tv, NULL);
501 offset_ts.tv_sec = tv.tv_sec - offset_ts.tv_sec;
502 offset_ts.tv_nsec = tv.tv_usec * 1000 - offset_ts.tv_nsec;
503 if (offset_ts.tv_nsec >= 0) return;
505 offset_ts.tv_nsec += 1000*1000*1000;
511 exim_gettime(struct timeval * tv)
513 #ifdef _POSIX_MONOTONIC_CLOCK
514 struct timespec now_ts;
516 if (clock_gettime(EXIM_CLOCKTYPE, &now_ts) == 0)
518 now_ts.tv_sec += offset_ts.tv_sec;
519 if ((now_ts.tv_nsec += offset_ts.tv_nsec) >= 1000*1000*1000)
522 now_ts.tv_nsec -= 1000*1000*1000;
524 tv->tv_sec = now_ts.tv_sec;
525 tv->tv_usec = now_ts.tv_nsec / 1000;
529 (void)gettimeofday(tv, NULL);
533 /* Exim uses a time + a pid to generate a unique identifier in two places: its
534 message IDs, and in file names for maildir deliveries. Because some OS now
535 re-use pids within the same second, sub-second times are now being used.
536 However, for absolute certainty, we must ensure the clock has ticked before
537 allowing the relevant process to complete. At the time of implementation of
538 this code (February 2003), the speed of processors is such that the clock will
539 invariably have ticked already by the time a process has done its job. This
540 function prepares for the time when things are faster - and it also copes with
541 clocks that go backwards.
544 prev_tv A timeval which was used to create uniqueness; its usec field
545 has been rounded down to the value of the resolution.
546 We want to be sure the current time is greater than this.
547 On return, updated to current (rounded down).
548 resolution The resolution that was used to divide the microseconds
549 (1 for maildir, larger for message ids)
555 exim_wait_tick(struct timeval * prev_tv, int resolution)
557 struct timeval now_tv;
558 long int now_true_usec;
560 exim_gettime(&now_tv);
561 now_true_usec = now_tv.tv_usec;
562 now_tv.tv_usec = (now_true_usec/resolution) * resolution;
564 while (exim_tvcmp(&now_tv, prev_tv) <= 0)
566 struct itimerval itval;
567 itval.it_interval.tv_sec = 0;
568 itval.it_interval.tv_usec = 0;
569 itval.it_value.tv_sec = prev_tv->tv_sec - now_tv.tv_sec;
570 itval.it_value.tv_usec = prev_tv->tv_usec + resolution - now_true_usec;
572 /* We know that, overall, "now" is less than or equal to "then". Therefore, a
573 negative value for the microseconds is possible only in the case when "now"
574 is more than a second less than "tgt". That means that itval.it_value.tv_sec
575 is greater than zero. The following correction is therefore safe. */
577 if (itval.it_value.tv_usec < 0)
579 itval.it_value.tv_usec += 1000000;
580 itval.it_value.tv_sec -= 1;
583 DEBUG(D_transport|D_receive)
585 if (!f.running_in_test_harness)
587 debug_printf("tick check: " TIME_T_FMT ".%06lu " TIME_T_FMT ".%06lu\n",
588 prev_tv->tv_sec, (long) prev_tv->tv_usec,
589 now_tv.tv_sec, (long) now_tv.tv_usec);
590 debug_printf("waiting " TIME_T_FMT ".%06lu sec\n",
591 itval.it_value.tv_sec, (long) itval.it_value.tv_usec);
597 /* Be prapared to go around if the kernel does not implement subtick
598 granularity (GNU Hurd) */
600 exim_gettime(&now_tv);
601 now_true_usec = now_tv.tv_usec;
602 now_tv.tv_usec = (now_true_usec/resolution) * resolution;
610 /*************************************************
611 * Call fopen() with umask 777 and adjust mode *
612 *************************************************/
614 /* Exim runs with umask(0) so that files created with open() have the mode that
615 is specified in the open() call. However, there are some files, typically in
616 the spool directory, that are created with fopen(). They end up world-writeable
617 if no precautions are taken. Although the spool directory is not accessible to
618 the world, this is an untidiness. So this is a wrapper function for fopen()
619 that sorts out the mode of the created file.
622 filename the file name
623 options the fopen() options
624 mode the required mode
626 Returns: the fopened FILE or NULL
630 modefopen(const uschar *filename, const char *options, mode_t mode)
632 mode_t saved_umask = umask(0777);
633 FILE *f = Ufopen(filename, options);
634 (void)umask(saved_umask);
635 if (f != NULL) (void)fchmod(fileno(f), mode);
640 /*************************************************
641 * Ensure stdin, stdout, and stderr exist *
642 *************************************************/
644 /* Some operating systems grumble if an exec() happens without a standard
645 input, output, and error (fds 0, 1, 2) being defined. The worry is that some
646 file will be opened and will use these fd values, and then some other bit of
647 code will assume, for example, that it can write error messages to stderr.
648 This function ensures that fds 0, 1, and 2 are open if they do not already
649 exist, by connecting them to /dev/null.
651 This function is also used to ensure that std{in,out,err} exist at all times,
652 so that if any library that Exim calls tries to use them, it doesn't crash.
663 for (int i = 0; i <= 2; i++)
665 if (fstat(i, &statbuf) < 0 && errno == EBADF)
667 if (devnull < 0) devnull = open("/dev/null", O_RDWR);
668 if (devnull < 0) log_write(0, LOG_MAIN|LOG_PANIC_DIE, "%s",
669 string_open_failed("/dev/null", NULL));
670 if (devnull != i) (void)dup2(devnull, i);
673 if (devnull > 2) (void)close(devnull);
679 /*************************************************
680 * Close unwanted file descriptors for delivery *
681 *************************************************/
683 /* This function is called from a new process that has been forked to deliver
684 an incoming message, either directly, or using exec.
686 We want any smtp input streams to be closed in this new process. However, it
687 has been observed that using fclose() here causes trouble. When reading in -bS
688 input, duplicate copies of messages have been seen. The files will be sharing a
689 file pointer with the parent process, and it seems that fclose() (at least on
690 some systems - I saw this on Solaris 2.5.1) messes with that file pointer, at
691 least sometimes. Hence we go for closing the underlying file descriptors.
693 If TLS is active, we want to shut down the TLS library, but without molesting
694 the parent's SSL connection.
696 For delivery of a non-SMTP message, we want to close stdin and stdout (and
697 stderr unless debugging) because the calling process might have set them up as
698 pipes and be waiting for them to close before it waits for the submission
699 process to terminate. If they aren't closed, they hold up the calling process
700 until the initial delivery process finishes, which is not what we want.
702 Exception: We do want it for synchronous delivery!
704 And notwithstanding all the above, if D_resolver is set, implying resolver
705 debugging, leave stdout open, because that's where the resolver writes its
708 When we close stderr (which implies we've also closed stdout), we also get rid
709 of any controlling terminal.
721 tls_close(NULL, TLS_NO_SHUTDOWN); /* Shut down the TLS library */
723 (void)close(fileno(smtp_in));
724 (void)close(fileno(smtp_out));
729 (void)close(0); /* stdin */
730 if ((debug_selector & D_resolver) == 0) (void)close(1); /* stdout */
731 if (debug_selector == 0) /* stderr */
733 if (!f.synchronous_delivery)
746 /*************************************************
748 *************************************************/
750 /* This function sets a new uid and gid permanently, optionally calling
751 initgroups() to set auxiliary groups. There are some special cases when running
752 Exim in unprivileged modes. In these situations the effective uid will not be
753 root; if we already have the right effective uid/gid, and don't need to
754 initialize any groups, leave things as they are.
759 igflag TRUE if initgroups() wanted
760 msg text to use in debugging output and failure log
762 Returns: nothing; bombs out on failure
766 exim_setugid(uid_t uid, gid_t gid, BOOL igflag, const uschar * msg)
768 uid_t euid = geteuid();
769 gid_t egid = getegid();
771 if (euid == root_uid || euid != uid || egid != gid || igflag)
773 /* At least one OS returns +1 for initgroups failure, so just check for
778 struct passwd *pw = getpwuid(uid);
780 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "cannot run initgroups(): "
781 "no passwd entry for uid=%ld", (long int)uid);
783 if (initgroups(pw->pw_name, gid) != 0)
784 log_write(0,LOG_MAIN|LOG_PANIC_DIE,"initgroups failed for uid=%ld: %s",
785 (long int)uid, strerror(errno));
788 if (setgid(gid) < 0 || setuid(uid) < 0)
789 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "unable to set gid=%ld or uid=%ld "
790 "(euid=%ld): %s", (long int)gid, (long int)uid, (long int)euid, msg);
793 /* Debugging output included uid/gid and all groups */
797 int group_count, save_errno;
798 gid_t group_list[EXIM_GROUPLIST_SIZE];
799 debug_printf("changed uid/gid: %s\n uid=%ld gid=%ld pid=%ld\n", msg,
800 (long int)geteuid(), (long int)getegid(), (long int)getpid());
801 group_count = getgroups(nelem(group_list), group_list);
803 debug_printf(" auxiliary group list:");
805 for (int i = 0; i < group_count; i++) debug_printf(" %d", (int)group_list[i]);
806 else if (group_count < 0)
807 debug_printf(" <error: %s>", strerror(save_errno));
808 else debug_printf(" <none>");
816 /*************************************************
818 *************************************************/
820 /* Exim exits via this function so that it always clears up any open
826 Returns: does not return
835 debug_printf(">>>>>>>>>>>>>>>> Exim pid=%d (%s) terminating with rc=%d "
836 ">>>>>>>>>>>>>>>>\n",
837 (int)getpid(), process_purpose, rc);
843 exim_underbar_exit(int rc)
847 debug_printf(">>>>>>>>>>>>>>>> Exim pid=%d (%s) terminating with rc=%d "
848 ">>>>>>>>>>>>>>>>\n",
849 (int)getpid(), process_purpose, rc);
855 /* Print error string, then die */
857 exim_fail(const char * fmt, ...)
861 vfprintf(stderr, fmt, ap);
866 /* fail if a length is too long */
868 exim_len_fail_toolong(int itemlen, int maxlen, const char * description)
870 if (itemlen <= maxlen)
872 fprintf(stderr, "exim: length limit exceeded (%d > %d) for: %s\n",
873 itemlen, maxlen, description);
877 /* only pass through the string item back to the caller if it's short enough */
878 static inline const uschar *
879 exim_str_fail_toolong(const uschar * item, int maxlen, const char * description)
882 exim_fail("exim: bad item for: %s\n", description);
883 exim_len_fail_toolong(Ustrlen(item), maxlen, description);
887 /* as above, copying as tainted */
888 static inline const uschar *
889 exim_arg_copy(const uschar * item, int maxlen, const char * description)
891 return string_copy_taint(exim_str_fail_toolong(item, maxlen, description),
895 /* exim_chown_failure() called from exim_chown()/exim_fchown() on failure
896 of chown()/fchown(). See src/functions.h for more explanation */
898 exim_chown_failure(int fd, const uschar *name, uid_t owner, gid_t group)
900 int saved_errno = errno; /* from the preceeding chown call */
902 log_write(0, LOG_MAIN|LOG_PANIC,
903 __FILE__ ":%d: chown(%s, %d:%d) failed (%s)."
904 " Please contact the authors and refer to https://bugs.exim.org/show_bug.cgi?id=2391",
905 __LINE__, name?name:US"<unknown>", owner, group, strerror(errno));
907 /* I leave this here, commented, in case the "bug"(?) comes up again.
908 It is not an Exim bug, but we can provide a workaround.
914 if (0 == (fd < 0 ? stat(name, &buf) : fstat(fd, &buf)))
916 if (buf.st_uid == owner && buf.st_gid == group) return 0;
917 log_write(0, LOG_MAIN|LOG_PANIC, "Wrong ownership on %s", name);
919 else log_write(0, LOG_MAIN|LOG_PANIC, "Stat failed on %s: %s", name, strerror(errno));
927 /* Bump the index for argv, checking for overflow,
928 and return the argument. */
930 static const uschar *
931 next_argv(const uschar ** argv, int * pi, int argc, const uschar * where)
934 if (++i >= argc) exim_fail("exim: bad item for: %s\n", where);
935 return argv[*pi = i];
939 /*************************************************
940 * Extract port from host address *
941 *************************************************/
943 /* Called to extract the port from the values given to -oMa and -oMi.
944 It also checks the syntax of the address, and terminates it before the
945 port data when a port is extracted.
948 address the address, with possible port on the end
950 Returns: the port, or zero if there isn't one
951 bombs out on a syntax error
955 check_port(uschar *address)
957 int port = host_address_extract_port(address);
958 if (string_is_ip_address(address, NULL) == 0)
959 exim_fail("exim abandoned: \"%s\" is not an IP address\n", address);
965 /*************************************************
966 * Test/verify an address *
967 *************************************************/
969 /* This function is called by the -bv and -bt code. It extracts a working
970 address from a full RFC 822 address. This isn't really necessary per se, but it
971 has the effect of collapsing source routes.
975 flags flag bits for verify_address()
976 exit_value to be set for failures
982 test_address(uschar *s, int flags, int *exit_value)
984 int start, end, domain;
985 uschar *parse_error = NULL;
986 uschar *address = parse_extract_address(s, &parse_error, &start, &end, &domain,
990 fprintf(stdout, "syntax error: %s\n", parse_error);
995 int rc = verify_address(deliver_make_addr(address,TRUE), stdout, flags, -1,
996 -1, -1, NULL, NULL, NULL);
997 if (rc == FAIL) *exit_value = 2;
998 else if (rc == DEFER && *exit_value == 0) *exit_value = 1;
1004 /*************************************************
1005 * Show supported features *
1006 *************************************************/
1009 show_string(BOOL is_stdout, gstring * g)
1011 const uschar * s = string_from_gstring(g);
1013 if (is_stdout) fputs(CCS s, stdout);
1014 else debug_printf("%s", s);
1019 show_db_version(gstring * g)
1021 g = string_cat(g, US"Hints DB:\n");
1022 #ifdef DB_VERSION_STRING
1025 g = string_fmt_append(g, " Library version: BDB: Compile: %s\n", DB_VERSION_STRING);
1026 g = string_fmt_append(g, " Runtime: %s\n",
1027 db_version(NULL, NULL, NULL));
1030 g = string_fmt_append(g, " Berkeley DB: %s\n", DB_VERSION_STRING);
1032 #elif defined(BTREEVERSION) && defined(HASHVERSION)
1034 g = string_cat(g, US" Probably Berkeley DB version 1.8x (native mode)\n");
1036 g = string_cat(g, US" Probably Berkeley DB version 1.8x (compatibility mode)\n");
1039 #elif defined(_DBM_RDONLY) || defined(dbm_dirfno)
1040 g = string_cat(g, US" Probably ndbm\n");
1041 #elif defined(USE_SQLITE)
1042 g = string_cat(g, US" Using sqlite3\n");
1043 #elif defined(USE_TDB)
1044 g = string_cat(g, US" Using tdb\n");
1047 g = string_cat(g, US" Probably GDBM (native mode)\n");
1049 g = string_cat(g, US" Probably GDBM (compatibility mode)\n");
1057 lookup_show_supported(gstring * g)
1059 gstring * b = NULL, * d = NULL;
1061 #ifdef LOOKUP_LSEARCH
1062 # if LOOKUP_LSEARCH!=2
1063 b = string_cat(b, US" lsearch wildlsearch nwildlsearch iplsearch");
1065 d = string_cat(d, US" lsearch wildlsearch nwildlsearch iplsearch");
1070 b = string_cat(b, US" cdb");
1072 d = string_cat(d, US" cdb");
1077 b = string_cat(b, US" dbm dbmjz dbmnz");
1079 d = string_cat(d, US" dbm dbmjz dbmnz");
1083 # if LOOKUP_DNSDB!=2
1084 b = string_cat(b, US" dnsdb");
1086 d = string_cat(d, US" dnsdb");
1089 #ifdef LOOKUP_DSEARCH
1090 # if LOOKUP_DSEARCH!=2
1091 b = string_cat(b, US" dsearch");
1093 d = string_cat(d, US" dsearch");
1097 # if LOOKUP_IBASE!=2
1098 b = string_cat(b, US" ibase");
1100 d = string_cat(d, US" ibase");
1105 b = string_cat(b, US" json");
1107 d = string_cat(d, US" json");
1112 b = string_cat(b, US" ldap ldapdn ldapm");
1114 d = string_cat(d, US" ldap ldapdn ldapm");
1119 b = string_cat(b, US" lmdb");
1121 d = string_cat(d, US" lmdb");
1125 # if LOOKUP_MYSQL!=2
1126 b = string_cat(b, US" mysql");
1128 d = string_cat(d, US" mysql");
1133 b = string_cat(b, US" nis nis0");
1135 d = string_cat(d, US" nis nis0");
1138 #ifdef LOOKUP_NISPLUS
1139 # if LOOKUP_NISPLUS!=2
1140 b = string_cat(b, US" nisplus");
1142 d = string_cat(d, US" nisplus");
1145 #ifdef LOOKUP_ORACLE
1146 # if LOOKUP_ORACLE!=2
1147 b = string_cat(b, US" oracle");
1149 d = string_cat(d, US" oracle");
1152 #ifdef LOOKUP_PASSWD
1153 # if LOOKUP_PASSWD!=2
1154 b = string_cat(b, US" passwd");
1156 d = string_cat(d, US" passwd");
1160 # if LOOKUP_PGSQL!=2
1161 b = string_cat(b, US" pgsql");
1163 d = string_cat(d, US" pgsql");
1167 # if LOOKUP_REDIS!=2
1168 b = string_cat(b, US" redis");
1170 d = string_cat(d, US" redis");
1175 b = string_cat(b, US" spf");
1177 d = string_cat(d, US" spf");
1180 #ifdef LOOKUP_SQLITE
1181 # if LOOKUP_SQLITE!=2
1182 b = string_cat(b, US" sqlite");
1184 d = string_cat(d, US" sqlite");
1187 #ifdef LOOKUP_TESTDB
1188 # if LOOKUP_TESTDB!=2
1189 b = string_cat(b, US" testdb");
1191 d = string_cat(d, US" testdb");
1194 #ifdef LOOKUP_WHOSON
1195 # if LOOKUP_WHOSON!=2
1196 b = string_cat(b, US" whoson");
1198 d = string_cat(d, US" whoson");
1202 if (b) g = string_fmt_append(g, "Lookups (built-in):%Y\n", b);
1203 if (d) g = string_fmt_append(g, "Lookups (dynamic): %Y\n", d);
1209 lookup_version_report_cb(uschar * name, uschar * ptr, void * ctx)
1211 const lookup_info * li = (lookup_info *)ptr;
1212 gstring ** gp = ctx;
1214 if (li->version_report)
1215 *gp = li->version_report(*gp);
1219 /* This function is called for -bV/--version and for -d to output the optional
1220 features of the current Exim binary.
1222 Arguments: BOOL, true for stdout else debug channel
1227 show_whats_supported(BOOL is_stdout)
1229 rmark reset_point = store_mark();
1232 DEBUG(D_any) {} else g = show_db_version(g);
1234 g = string_cat(g, US"Support for:");
1235 #ifdef WITH_CONTENT_SCAN
1236 g = string_cat(g, US" Content_Scanning");
1238 #ifndef DISABLE_EXIM_FILTER
1239 g = string_cat(g, US" Exim_filter");
1241 #ifndef DISABLE_SIEVE_FILTER
1242 g = string_cat(g, US" Sieve_filter");
1244 #ifdef SUPPORT_CRYPTEQ
1245 g = string_cat(g, US" crypteq");
1247 #ifdef EXPAND_DLFUNC
1248 g = string_cat(g, US" Expand_dlfunc");
1251 g = string_cat(g, US" iconv()");
1254 g = string_cat(g, US" IPv6");
1257 g = string_cat(g, US" PAM");
1260 g = string_cat(g, US" Perl");
1263 g = string_cat(g, US" GnuTLS");
1265 #ifdef SUPPORT_MOVE_FROZEN_MESSAGES
1266 g = string_cat(g, US" move_frozen_messages");
1269 g = string_cat(g, US" OpenSSL");
1271 #if defined(CYRUS_PWCHECK_SOCKET)
1272 g = string_cat(g, US" pwcheck");
1274 #if defined(RADIUS_CONFIG_FILE)
1275 g = string_cat(g, US" radius");
1277 #ifndef DISABLE_TLS_RESUME
1278 g = string_cat(g, US" TLS_resume");
1280 #ifdef SUPPORT_TRANSLATE_IP_ADDRESS
1281 g = string_cat(g, US" translate_ip_address");
1283 #ifdef USE_TCP_WRAPPERS
1284 g = string_cat(g, US" TCPwrappers");
1286 #ifdef HAVE_SETCLASSRESOURCES
1287 g = string_cat(g, US" use_setclassresources");
1290 g = string_cat(g, US" DANE");
1292 #ifndef DISABLE_DKIM
1293 g = string_cat(g, US" DKIM");
1295 #ifdef SUPPORT_DMARC
1296 g = string_cat(g, US" DMARC");
1298 #ifndef DISABLE_DNSSEC
1299 g = string_cat(g, US" DNSSEC");
1301 #ifndef DISABLE_ESMTP_LIMITS
1302 g = string_cat(g, US" ESMTP_Limits");
1304 #ifndef DISABLE_WELLKNOWN
1305 g = string_cat(g, US" ESMTP_Wellknown");
1307 #ifndef DISABLE_EVENT
1308 g = string_cat(g, US" Event");
1311 g = string_cat(g, US" I18N");
1313 #ifndef DISABLE_OCSP
1314 g = string_cat(g, US" OCSP");
1316 #ifndef DISABLE_PIPE_CONNECT
1317 g = string_cat(g, US" PIPECONNECT");
1319 #ifndef DISABLE_PRDR
1320 g = string_cat(g, US" PRDR");
1322 #ifdef SUPPORT_PROXY
1323 g = string_cat(g, US" PROXY");
1325 #ifndef DISABLE_QUEUE_RAMP
1326 g = string_cat(g, US" Queue_Ramp");
1328 #ifdef SUPPORT_SOCKS
1329 g = string_cat(g, US" SOCKS");
1332 g = string_cat(g, US" SPF");
1334 #if defined(SUPPORT_SRS)
1335 g = string_cat(g, US" SRS");
1339 if (f.tcp_fastopen_ok) g = string_cat(g, US" TCP_Fast_Open");
1341 #ifdef EXPERIMENTAL_ARC
1342 g = string_cat(g, US" Experimental_ARC");
1344 #ifdef EXPERIMENTAL_BRIGHTMAIL
1345 g = string_cat(g, US" Experimental_Brightmail");
1347 #ifdef EXPERIMENTAL_DCC
1348 g = string_cat(g, US" Experimental_DCC");
1350 #ifdef EXPERIMENTAL_DSN_INFO
1351 g = string_cat(g, US" Experimental_DSN_info");
1353 #ifdef EXPERIMENTAL_QUEUEFILE
1354 g = string_cat(g, US" Experimental_QUEUEFILE");
1356 #ifdef EXPERIMENTAL_XCLIENT
1357 g = string_cat(g, US" Experimental_XCLIENT");
1359 g = string_cat(g, US"\n");
1361 g = lookup_show_supported(g);
1362 g = auth_show_supported(g);
1363 g = route_show_supported(g);
1364 g = transport_show_supported(g);
1366 #ifdef WITH_CONTENT_SCAN
1367 g = malware_show_supported(g);
1369 show_string(is_stdout, g); g = NULL;
1371 if (fixed_never_users[0] > 0)
1374 g = string_cat(g, US"Fixed never_users: ");
1375 for (i = 1; i <= (int)fixed_never_users[0] - 1; i++)
1376 string_fmt_append(g, "%u:", (unsigned)fixed_never_users[i]);
1377 g = string_fmt_append(g, "%u\n", (unsigned)fixed_never_users[i]);
1380 g = string_fmt_append(g, "Configure owner: %d:%d\n", config_uid, config_gid);
1382 g = string_fmt_append(g, "Size of off_t: " SIZE_T_FMT "\n", sizeof(off_t));
1384 /* Everything else is details which are only worth reporting when debugging.
1385 Perhaps the tls_version_report should move into this too. */
1389 /* clang defines __GNUC__ (at least, for me) so test for it first */
1390 #if defined(__clang__)
1391 g = string_fmt_append(g, "Compiler: CLang [%s]\n", __clang_version__);
1392 #elif defined(__GNUC__)
1394 g = string_fmt_append(g, "Compiler: GCC [%s]\n", __VERSION__);
1396 g = string_fmt_append(g, "Compiler: GCC [%s]\n", "? unknown version ?";
1399 g = string_cat(g, US"Compiler: <unknown>\n");
1402 #if defined(__GLIBC__) && !defined(__UCLIBC__)
1403 g = string_fmt_append(g, "Library version: Glibc: Compile: %d.%d\n",
1404 __GLIBC__, __GLIBC_MINOR__);
1405 if (__GLIBC_PREREQ(2, 1))
1406 g = string_fmt_append(g, " Runtime: %s\n",
1407 gnu_get_libc_version());
1410 g = show_db_version(g);
1413 g = tls_version_report(g);
1416 g = utf8_version_report(g);
1419 /*XXX do we need a "show misc-mods version-report" ?
1420 Currently they are output in misc_mod_add() */
1422 show_string(is_stdout, g);
1425 for (auth_info * ai = auths_available; ai; ai = (auth_info *)ai->drinfo.next)
1426 if (ai->version_report)
1427 g = (*ai->version_report)(g);
1429 /* PCRE_PRERELEASE is either defined and empty or a bare sequence of
1430 characters; unless it's an ancient version of PCRE in which case it
1432 #ifndef PCRE_PRERELEASE
1433 # define PCRE_PRERELEASE
1436 #define EXPAND_AND_QUOTE(X) QUOTE(X)
1439 pcre2_config(PCRE2_CONFIG_VERSION, buf);
1440 g = string_fmt_append(g, "Library version: PCRE2: Compile: %d.%d%s\n"
1442 PCRE2_MAJOR, PCRE2_MINOR,
1443 EXPAND_AND_QUOTE(PCRE2_PRERELEASE) "",
1447 #undef EXPAND_AND_QUOTE
1449 show_string(is_stdout, g);
1453 tree_walk(lookups_tree, lookup_version_report_cb, &g);
1454 show_string(is_stdout, g);
1456 init_misc_mod_list();
1458 #ifdef WHITELIST_D_MACROS
1459 g = string_fmt_append(g, "WHITELIST_D_MACROS: \"%s\"\n", WHITELIST_D_MACROS);
1461 g = string_cat(g, US"WHITELIST_D_MACROS unset\n");
1463 #ifdef TRUSTED_CONFIG_LIST
1464 g = string_fmt_append(g, "TRUSTED_CONFIG_LIST: \"%s\"\n", TRUSTED_CONFIG_LIST);
1466 g = string_cat(g, US"TRUSTED_CONFIG_LIST unset\n");
1470 show_string(is_stdout, g);
1471 store_reset(reset_point);
1475 /*************************************************
1476 * Show auxiliary information about Exim *
1477 *************************************************/
1480 show_exim_information(enum commandline_info request, FILE *stream)
1485 fprintf(stream, "Oops, something went wrong.\n");
1489 "The -bI: flag takes a string indicating which information to provide.\n"
1490 "If the string is not recognised, you'll get this help (on stderr).\n"
1492 " exim -bI:help this information\n"
1493 " exim -bI:dscp list of known dscp value keywords\n"
1494 " exim -bI:sieve list of supported sieve extensions\n"
1499 const misc_module_info * mi;
1500 typedef void (*fn_t)(FILE *);
1501 if ((mi = misc_mod_find(US"sieve_filter", NULL)))
1502 (((fn_t *) mi->functions)[SIEVE_EXTENSIONS]) (stream);
1504 fprintf(stream, "Sieve filtering not available\n");
1508 dscp_list_to_stream(stream);
1514 /*************************************************
1515 * Quote a local part *
1516 *************************************************/
1518 /* This function is used when a sender address or a From: or Sender: header
1519 line is being created from the caller's login, or from an authenticated_id. It
1520 applies appropriate quoting rules for a local part.
1522 Argument: the local part
1523 Returns: the local part, quoted if necessary
1527 local_part_quote(const uschar * lpart)
1529 BOOL needs_quote = FALSE;
1532 for (const uschar * t = lpart; !needs_quote && *t; t++)
1533 needs_quote = !isalnum(*t) && strchr("!#$%&'*+-/=?^_`{|}~", *t) == NULL &&
1534 (*t != '.' || t == lpart || t[1] == 0);
1536 if (!needs_quote) return lpart;
1538 g = string_catn(NULL, US"\"", 1);
1542 uschar * nq = US Ustrpbrk(lpart, "\\\"");
1545 g = string_cat(g, lpart);
1548 g = string_catn(g, lpart, nq - lpart);
1549 g = string_catn(g, US"\\", 1);
1550 g = string_catn(g, nq, 1);
1554 g = string_catn(g, US"\"", 1);
1555 return string_from_gstring(g);
1561 /*************************************************
1562 * Load readline() functions *
1563 *************************************************/
1565 /* This function is called from testing executions that read data from stdin,
1566 but only when running as the calling user. Currently, only -be does this. The
1567 function loads the readline() function library and passes back the functions.
1568 On some systems, it needs the curses library, so load that too, but try without
1569 it if loading fails. All this functionality has to be requested at build time.
1572 fn_readline_ptr pointer to where to put the readline pointer
1573 fn_addhist_ptr pointer to where to put the addhistory function
1575 Returns: the dlopen handle or NULL on failure
1579 set_readline(char * (**fn_readline_ptr)(const char *),
1580 void (**fn_addhist_ptr)(const char *))
1583 void *dlhandle_curses = dlopen("libcurses." DYNLIB_FN_EXT, RTLD_GLOBAL|RTLD_LAZY);
1585 dlhandle = dlopen("libreadline." DYNLIB_FN_EXT, RTLD_GLOBAL|RTLD_NOW);
1586 if (dlhandle_curses) dlclose(dlhandle_curses);
1590 /* Checked manual pages; at least in GNU Readline 6.1, the prototypes are:
1591 * char * readline (const char *prompt);
1592 * void add_history (const char *string);
1594 *fn_readline_ptr = (char *(*)(const char*))dlsym(dlhandle, "readline");
1595 *fn_addhist_ptr = (void(*)(const char*))dlsym(dlhandle, "add_history");
1598 DEBUG(D_any) debug_printf("failed to load readline: %s\n", dlerror());
1606 /*************************************************
1607 * Get a line from stdin for testing things *
1608 *************************************************/
1610 /* This function is called when running tests that can take a number of lines
1611 of input (for example, -be and -bt). It handles continuations and trailing
1612 spaces. And prompting and a blank line output on eof. If readline() is in use,
1613 the arguments are non-NULL and provide the relevant functions.
1616 fn_readline readline function or NULL
1617 fn_addhist addhist function or NULL
1619 Returns: pointer to dynamic memory, or NULL at end of file
1623 get_stdinput(char *(*fn_readline)(const char *), void(*fn_addhist)(const char *))
1626 BOOL had_input = FALSE;
1628 if (!fn_readline) { printf("> "); fflush(stdout); }
1630 for (int i = 0;; i++)
1632 uschar buffer[1024];
1636 char *readline_line = NULL;
1639 if (!(readline_line = fn_readline((i > 0)? "":"> "))) break;
1640 if (*readline_line && fn_addhist) fn_addhist(readline_line);
1641 p = US readline_line;
1646 /* readline() not in use */
1649 if (Ufgets(buffer, sizeof(buffer), stdin) == NULL) break; /*EOF*/
1653 /* Handle the line */
1656 ss = p + Ustrlen(p);
1657 while (ss > p && isspace(ss[-1])) ss--; /* strip trailing newline (and spaces) */
1660 while (p < ss && isspace(*p)) p++; /* strip leading space after cont */
1662 g = string_catn(g, p, ss - p);
1665 if (fn_readline) free(readline_line);
1668 /* g can only be NULL if ss==p */
1669 if (ss == p || gstring_last_char(g) != '\\') /* not continuation; done */
1672 gstring_trim(g, 1); /* drop the \ */
1675 if (had_input) return g ? string_from_gstring(g) : US"";
1682 /*************************************************
1683 * Output usage information for the program *
1684 *************************************************/
1686 /* This function is called when there are no recipients
1687 or a specific --help argument was added.
1690 progname information on what name we were called by
1692 Returns: DOES NOT RETURN
1696 exim_usage(const uschar * progname)
1699 /* Handle specific program invocation variants */
1700 if (Ustrcmp(progname, US"-mailq") == 0)
1702 "mailq - list the contents of the mail queue\n\n"
1703 "For a list of options, see the Exim documentation.\n");
1705 /* Generic usage - we output this whatever happens */
1707 "Exim is a Mail Transfer Agent. It is normally called by Mail User Agents,\n"
1708 "not directly from a shell command line. Options and/or arguments control\n"
1709 "what it does when called. For a list of options, see the Exim documentation.\n");
1714 /*************************************************
1715 * Validate that the macros given are okay *
1716 *************************************************/
1718 /* Typically, Exim will drop privileges if macros are supplied. In some
1719 cases, we want to not do so.
1721 Arguments: opt_D_used - true if the commandline had a "-D" option
1722 Returns: true if trusted, false otherwise
1726 macros_trusted(BOOL opt_D_used)
1728 #ifdef WHITELIST_D_MACROS
1729 uschar *whitelisted, *end, *p, **whites;
1730 int white_count, i, n;
1732 BOOL prev_char_item, found;
1737 #ifndef WHITELIST_D_MACROS
1741 /* We only trust -D overrides for some invoking users:
1742 root, the exim run-time user, the optional config owner user.
1743 I don't know why config-owner would be needed, but since they can own the
1744 config files anyway, there's no security risk to letting them override -D. */
1745 if ( ! ((real_uid == root_uid)
1746 || (real_uid == exim_uid)
1747 #ifdef CONFIGURE_OWNER
1748 || (real_uid == config_uid)
1752 debug_printf("macros_trusted rejecting macros for uid %d\n", (int) real_uid);
1756 /* Get a list of macros which are whitelisted */
1757 whitelisted = string_copy_perm(US WHITELIST_D_MACROS, FALSE);
1758 prev_char_item = FALSE;
1760 for (p = whitelisted; *p != '\0'; ++p)
1762 if (*p == ':' || isspace(*p))
1767 prev_char_item = FALSE;
1770 if (!prev_char_item)
1771 prev_char_item = TRUE;
1778 whites = store_malloc(sizeof(uschar *) * (white_count+1));
1779 for (p = whitelisted, i = 0; (p != end) && (i < white_count); ++p)
1784 if (i == white_count)
1786 while (*p != '\0' && p < end)
1792 /* The list of commandline macros should be very short.
1793 Accept the N*M complexity. */
1794 for (macro_item * m = macros_user; m; m = m->next) if (m->command_line)
1797 for (uschar ** w = whites; *w; ++w)
1798 if (Ustrcmp(*w, m->name) == 0)
1805 if (!m->replacement)
1807 if ((len = m->replen) == 0)
1809 if (!regex_match(regex_whitelisted_macro, m->replacement, len, NULL))
1812 DEBUG(D_any) debug_printf("macros_trusted overridden to true by whitelisting\n");
1818 /*************************************************
1819 * Expansion testing *
1820 *************************************************/
1822 /* Expand and print one item, doing macro-processing.
1825 item line for expansion
1829 expansion_test_line(const uschar * line)
1835 Ustrncpy(big_buffer, line, big_buffer_size);
1836 big_buffer[big_buffer_size-1] = '\0';
1837 len = Ustrlen(big_buffer);
1839 (void) macros_expand(0, &len, &dummy_macexp);
1841 #ifdef LOOKUP_MODULE_DIR
1842 //mod_load_check(big_buffer);
1845 if (isupper(big_buffer[0]))
1847 if (macro_read_assignment(big_buffer))
1848 printf("Defined macro '%s'\n", mlast->name);
1850 else if (Ustrncmp(big_buffer, "set,t ", 6) == 0)
1851 printf("%s\n", acl_standalone_setvar(big_buffer+6, TRUE));
1852 else if (Ustrncmp(big_buffer, "set ", 4) == 0)
1853 printf("%s\n", acl_standalone_setvar(big_buffer+4, FALSE));
1855 if ((s = expand_string(big_buffer))) printf("%s\n", CS s);
1856 else printf("Failed: %s\n", expand_string_message);
1861 /*************************************************
1862 * Queue-runner operations *
1863 *************************************************/
1865 /* Prefix a new qrunner descriptor to the qrunners list */
1870 qrunner * q = qrunners;
1871 qrunners = store_get(sizeof(qrunner), GET_UNTAINTED);
1872 memset(qrunners, 0, sizeof(qrunner)); /* default queue, zero interval */
1874 qrunners->next_tick = time(NULL); /* run right away */
1879 alloc_onetime_qrunner(void)
1881 qrunners = store_get_perm(sizeof(qrunner), GET_UNTAINTED);
1882 memset(qrunners, 0, sizeof(qrunner)); /* default queue, zero interval */
1883 qrunners->next_tick = time(NULL); /* run right away */
1884 qrunners->run_max = 1;
1889 /*************************************************
1890 * Entry point and high-level code *
1891 *************************************************/
1893 /* Entry point for the Exim mailer. Analyse the arguments and arrange to take
1894 the appropriate action. All the necessary functions are present in the one
1895 binary. I originally thought one should split it up, but it turns out that so
1896 much of the apparatus is needed in each chunk that one might as well just have
1897 it all available all the time, which then makes the coding easier as well.
1900 argc count of entries in argv
1901 argv argument strings, with argv[0] being the program name
1903 Returns: EXIT_SUCCESS if terminated successfully
1904 EXIT_FAILURE otherwise, except when a message has been sent
1905 to the sender, and -oee was given
1909 main(int argc, char ** cargv)
1911 const uschar ** argv = CUSS cargv;
1912 int arg_receive_timeout = -1;
1913 int arg_smtp_receive_timeout = -1;
1914 int arg_error_handling = error_handling;
1915 int filter_sfd = -1;
1916 int filter_ufd = -1;
1919 int list_queue_option = QL_BASIC;
1921 int msg_action_arg = -1;
1922 int namelen = argv[0] ? Ustrlen(argv[0]) : 0;
1923 int queue_only_reason = 0;
1925 int perl_start_option = 0;
1927 int recipients_arg = argc;
1928 int sender_address_domain = 0;
1929 int test_retry_arg = -1;
1930 int test_rewrite_arg = -1;
1931 gid_t original_egid;
1932 BOOL arg_queue_only = FALSE;
1933 BOOL bi_option = FALSE;
1934 BOOL checking = FALSE;
1935 BOOL count_queue = FALSE;
1936 BOOL expansion_test = FALSE;
1937 BOOL extract_recipients = FALSE;
1938 BOOL flag_G = FALSE;
1939 BOOL flag_n = FALSE;
1940 BOOL forced_delivery = FALSE;
1941 BOOL f_end_dot = FALSE;
1942 BOOL deliver_give_up = FALSE;
1943 BOOL list_queue = FALSE;
1944 BOOL list_options = FALSE;
1945 BOOL list_config = FALSE;
1946 BOOL local_queue_only;
1947 BOOL one_msg_action = FALSE;
1948 BOOL opt_D_used = FALSE;
1949 BOOL queue_only_set = FALSE;
1950 BOOL receiving_message = TRUE;
1951 BOOL sender_ident_set = FALSE;
1952 BOOL session_local_queue_only;
1954 BOOL removed_privilege = FALSE;
1955 BOOL usage_wanted = FALSE;
1956 BOOL verify_address_mode = FALSE;
1957 BOOL verify_as_sender = FALSE;
1958 BOOL rcpt_verify_quota = FALSE;
1959 BOOL version_printed = FALSE;
1960 const uschar * alias_arg = NULL;
1961 const uschar * called_as = US"";
1962 const uschar * cmdline_syslog_name = NULL;
1963 const uschar * start_queue_run_id = NULL;
1964 const uschar * stop_queue_run_id = NULL;
1965 const uschar * expansion_test_message = NULL;
1966 const uschar * ftest_domain = NULL;
1967 const uschar * ftest_localpart = NULL;
1968 const uschar * ftest_prefix = NULL;
1969 const uschar * ftest_suffix = NULL;
1970 uschar * log_oneline = NULL;
1971 const uschar * malware_test_file = NULL;
1972 const uschar * real_sender_address;
1973 uschar * originator_home = US"/";
1977 struct stat statbuf;
1978 pid_t passed_qr_pid = (pid_t)0;
1979 int passed_qr_pipe = -1;
1980 gid_t group_list[EXIM_GROUPLIST_SIZE];
1982 /* For the -bI: flag */
1983 enum commandline_info info_flag = CMDINFO_NONE;
1984 BOOL info_stdout = FALSE;
1986 /* Possible options for -R and -S */
1988 static uschar *rsopts[] = { US"f", US"ff", US"r", US"rf", US"rff" };
1990 /* Need to define this in case we need to change the environment in order
1991 to get rid of a bogus time zone. We have to make it char rather than uschar
1992 because some OS define it in /usr/include/unistd.h. */
1994 extern char **environ;
1996 #ifdef MEASURE_TIMING
1997 (void)gettimeofday(×tamp_startup, NULL);
2000 store_init(); /* Initialise the memory allocation susbsystem */
2001 pcre_init(); /* Set up memory handling for pcre */
2003 /* If the Exim user and/or group and/or the configuration file owner/group were
2004 defined by ref:name at build time, we must now find the actual uid/gid values.
2005 This is a feature to make the lives of binary distributors easier. */
2007 #ifdef EXIM_USERNAME
2008 if (route_finduser(US EXIM_USERNAME, &pw, &exim_uid))
2011 exim_fail("exim: refusing to run with uid 0 for \"%s\"\n", EXIM_USERNAME);
2013 /* If ref:name uses a number as the name, route_finduser() returns
2014 TRUE with exim_uid set and pw coerced to NULL. */
2016 exim_gid = pw->pw_gid;
2017 #ifndef EXIM_GROUPNAME
2020 "exim: ref:name should specify a usercode, not a group.\n"
2021 "exim: can't let you get away with it unless you also specify a group.\n");
2025 exim_fail("exim: failed to find uid for user name \"%s\"\n", EXIM_USERNAME);
2028 #ifdef EXIM_GROUPNAME
2029 if (!route_findgroup(US EXIM_GROUPNAME, &exim_gid))
2030 exim_fail("exim: failed to find gid for group name \"%s\"\n", EXIM_GROUPNAME);
2033 #ifdef CONFIGURE_OWNERNAME
2034 if (!route_finduser(US CONFIGURE_OWNERNAME, NULL, &config_uid))
2035 exim_fail("exim: failed to find uid for user name \"%s\"\n",
2036 CONFIGURE_OWNERNAME);
2039 /* We default the system_filter_user to be the Exim run-time user, as a
2040 sane non-root value. */
2041 system_filter_uid = exim_uid;
2043 #ifdef CONFIGURE_GROUPNAME
2044 if (!route_findgroup(US CONFIGURE_GROUPNAME, &config_gid))
2045 exim_fail("exim: failed to find gid for group name \"%s\"\n",
2046 CONFIGURE_GROUPNAME);
2049 /* In the Cygwin environment, some initialization used to need doing.
2050 It was fudged in by means of this macro; now no longer but we'll leave
2051 it in case of others. */
2057 /* Check a field which is patched when we are running Exim within its
2058 testing harness; do a fast initial check, and then the whole thing. */
2060 f.running_in_test_harness =
2061 *running_status == '<' && Ustrcmp(running_status, "<<<testing>>>") == 0;
2062 if (f.running_in_test_harness)
2065 /* Protect against abusive argv[0] */
2066 if (!argv[0] || !argc) exim_fail("exim: executable name required\n");
2067 exim_str_fail_toolong(argv[0], PATH_MAX, "argv[0]");
2069 /* The C standard says that the equivalent of setlocale(LC_ALL, "C") is obeyed
2070 at the start of a program; however, it seems that some environments do not
2071 follow this. A "strange" locale can affect the formatting of timestamps, so we
2074 setlocale(LC_ALL, "C");
2076 /* Get the offset between CLOCK_MONOTONIC/CLOCK_BOOTTIME and wallclock */
2078 #ifdef _POSIX_MONOTONIC_CLOCK
2082 /* Set up the default handler for timing using alarm(). */
2084 os_non_restarting_signal(SIGALRM, sigalrm_handler);
2086 /* Ensure we have a buffer for constructing log entries. Use malloc directly,
2087 because store_malloc writes a log entry on failure. */
2089 if (!(log_buffer = US malloc(LOG_BUFFER_SIZE)))
2090 exim_fail("exim: failed to get store for log buffer\n");
2092 /* Initialize the default log options. */
2094 bits_set(log_selector, log_selector_size, log_default);
2096 /* Set log_stderr to stderr, provided that stderr exists. This gets reset to
2097 NULL when the daemon is run and the file is closed. We have to use this
2098 indirection, because some systems don't allow writing to the variable "stderr".
2101 if (fstat(fileno(stderr), &statbuf) >= 0) log_stderr = stderr;
2103 /* Ensure there is a big buffer for temporary use in several places. It is put
2104 in malloc store so that it can be freed for enlargement if necessary. */
2106 big_buffer = store_malloc(big_buffer_size);
2108 /* Set up the handler for the data request signal, and set the initial
2109 descriptive text. */
2111 process_info = store_get(PROCESS_INFO_SIZE, GET_TAINTED);
2112 set_process_info("initializing");
2113 os_restarting_signal(SIGUSR1, usr1_handler); /* exiwhat */
2116 struct sigaction act = { .sa_sigaction = segv_handler, .sa_flags = SA_RESETHAND | SA_SIGINFO };
2117 sigaction(SIGSEGV, &act, NULL);
2120 signal(SIGSEGV, segv_handler); /* log faults */
2123 /* If running in a dockerized environment, the TERM signal is only
2124 delegated to the PID 1 if we request it by setting an signal handler */
2126 if (getpid() == 1) signal(SIGTERM, term_handler);
2128 /* SIGHUP is used to get the daemon to reconfigure. It gets set as appropriate
2129 in the daemon code. For the rest of Exim's uses, we ignore it. */
2131 signal(SIGHUP, SIG_IGN);
2133 /* We don't want to die on pipe errors as the code is written to handle
2134 the write error instead. */
2136 signal(SIGPIPE, SIG_IGN);
2138 /* Under some circumstance on some OS, Exim can get called with SIGCHLD
2139 set to SIG_IGN. This causes subprocesses that complete before the parent
2140 process waits for them not to hang around, so when Exim calls wait(), nothing
2141 is there. The wait() code has been made robust against this, but let's ensure
2142 that SIGCHLD is set to SIG_DFL, because it's tidier to wait and get a process
2143 ending status. We use sigaction rather than plain signal() on those OS where
2144 SA_NOCLDWAIT exists, because we want to be sure it is turned off. (There was a
2145 problem on AIX with this.) */
2149 struct sigaction act;
2150 act.sa_handler = SIG_DFL;
2151 sigemptyset(&(act.sa_mask));
2153 sigaction(SIGCHLD, &act, NULL);
2156 signal(SIGCHLD, SIG_DFL);
2159 /* Save the arguments for use if we re-exec exim as a daemon after receiving
2164 /* Set up the version number. Set up the leading 'E' for the external form of
2165 message ids, set the pointer to the internal form, and initialize it to
2166 indicate no message being processed. */
2169 message_id_option[0] = '-';
2170 message_id_external = message_id_option + 1;
2171 message_id_external[0] = 'E';
2172 message_id = message_id_external + 1;
2175 /* Set the umask to zero so that any files Exim creates using open() are
2176 created with the modes that it specifies. NOTE: Files created with fopen() have
2177 a problem, which was not recognized till rather late (February 2006). With this
2178 umask, such files will be world writeable. (They are all content scanning files
2179 in the spool directory, which isn't world-accessible, so this is not a
2180 disaster, but it's untidy.) I don't want to change this overall setting,
2181 however, because it will interact badly with the open() calls. Instead, there's
2182 now a function called modefopen() that fiddles with the umask while calling
2187 /* Precompile the regular expression for matching a message id. Keep this in
2188 step with the code that generates ids in the accept.c module. We need to do
2189 this here, because the -M options check their arguments for syntactic validity
2190 using mac_ismsgid, which uses this. */
2193 regex_must_compile(US"^(?:"
2194 "[^\\W_]{" str(MESSAGE_ID_TIME_LEN) "}"
2195 "-[^\\W_]{" str(MESSAGE_ID_PID_LEN) "}"
2196 "-[^\\W_]{" str(MESSAGE_ID_SUBTIME_LEN) "}"
2198 "(?:[^\\W_]{6}-){2}[^\\W_]{2}" /* old ID format */
2202 /* Precompile the regular expression that is used for matching an SMTP error
2203 code, possibly extended, at the start of an error message. Note that the
2204 terminating whitespace character is included. */
2207 regex_must_compile(US"^\\d\\d\\d\\s(?:\\d\\.\\d\\d?\\d?\\.\\d\\d?\\d?\\s)?",
2210 #ifdef WHITELIST_D_MACROS
2211 /* Precompile the regular expression used to filter the content of macros
2212 given to -D for permissibility. */
2214 regex_whitelisted_macro =
2215 regex_must_compile(US"^[A-Za-z0-9_/.-]*$", MCS_NOFLAGS, TRUE);
2218 /* If the program is called as "mailq" treat it as equivalent to "exim -bp";
2219 this seems to be a generally accepted convention, since one finds symbolic
2220 links called "mailq" in standard OS configurations. */
2222 if ((namelen == 5 && Ustrcmp(argv[0], "mailq") == 0) ||
2223 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/mailq", 6) == 0))
2226 receiving_message = FALSE;
2227 called_as = US"-mailq";
2230 /* If the program is called as "rmail" treat it as equivalent to
2231 "exim -i -oee", thus allowing UUCP messages to be input using non-SMTP mode,
2232 i.e. preventing a single dot on a line from terminating the message, and
2233 returning with zero return code, even in cases of error (provided an error
2234 message has been sent). */
2236 if ((namelen == 5 && Ustrcmp(argv[0], "rmail") == 0) ||
2237 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/rmail", 6) == 0))
2240 called_as = US"-rmail";
2241 errors_sender_rc = EXIT_SUCCESS;
2244 /* If the program is called as "rsmtp" treat it as equivalent to "exim -bS";
2245 this is a smail convention. */
2247 if ((namelen == 5 && Ustrcmp(argv[0], "rsmtp") == 0) ||
2248 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/rsmtp", 6) == 0))
2250 smtp_input = smtp_batched_input = TRUE;
2251 called_as = US"-rsmtp";
2254 /* If the program is called as "runq" treat it as equivalent to "exim -q";
2255 this is a smail convention. */
2257 if ((namelen == 4 && Ustrcmp(argv[0], "runq") == 0) ||
2258 (namelen > 4 && Ustrncmp(argv[0] + namelen - 5, "/runq", 5) == 0))
2260 alloc_onetime_qrunner();
2261 receiving_message = FALSE;
2262 called_as = US"-runq";
2265 /* If the program is called as "newaliases" treat it as equivalent to
2266 "exim -bi"; this is a sendmail convention. */
2268 if ((namelen == 10 && Ustrcmp(argv[0], "newaliases") == 0) ||
2269 (namelen > 10 && Ustrncmp(argv[0] + namelen - 11, "/newaliases", 11) == 0))
2272 receiving_message = FALSE;
2273 called_as = US"-newaliases";
2276 /* Save the original effective uid for a couple of uses later. It should
2277 normally be root, but in some esoteric environments it may not be. */
2279 original_euid = geteuid();
2280 original_egid = getegid();
2282 /* Get the real uid and gid. If the caller is root, force the effective uid/gid
2283 to be the same as the real ones. This makes a difference only if Exim is setuid
2284 (or setgid) to something other than root, which could be the case in some
2285 special configurations. */
2287 real_uid = getuid();
2288 real_gid = getgid();
2290 if (real_uid == root_uid)
2292 if ((rv = setgid(real_gid)))
2293 exim_fail("exim: setgid(%ld) failed: %s\n",
2294 (long int)real_gid, strerror(errno));
2295 if ((rv = setuid(real_uid)))
2296 exim_fail("exim: setuid(%ld) failed: %s\n",
2297 (long int)real_uid, strerror(errno));
2300 /* If neither the original real uid nor the original euid was root, Exim is
2301 running in an unprivileged state. */
2303 unprivileged = (real_uid != root_uid && original_euid != root_uid);
2305 /* For most of the args-parsing we need to use permanent pool memory */
2307 int old_pool = store_pool;
2308 store_pool = POOL_PERM;
2310 /* Scan the program's arguments. Some can be dealt with right away; others are
2311 simply recorded for checking and handling afterwards. Do a high-level switch
2312 on the second character (the one after '-'), to save some effort. */
2314 for (i = 1; i < argc; i++)
2316 BOOL badarg = FALSE;
2317 const uschar * arg = argv[i];
2318 const uschar * argrest;
2321 /* An argument not starting with '-' is the start of a recipients list;
2322 break out of the options-scanning loop. */
2330 /* An option consisting of -- terminates the options */
2332 if (Ustrcmp(arg, "--") == 0)
2334 recipients_arg = i + 1;
2338 /* Handle flagged options */
2340 switchchar = arg[1];
2343 /* Make all -ex options synonymous with -oex arguments, since that
2344 is assumed by various callers. Also make -qR options synonymous with -R
2345 options, as that seems to be required as well. Allow for -qqR too, and
2346 the same for -S options. */
2348 if (Ustrncmp(arg+1, "oe", 2) == 0 ||
2349 Ustrncmp(arg+1, "qR", 2) == 0 ||
2350 Ustrncmp(arg+1, "qS", 2) == 0)
2352 switchchar = arg[2];
2355 else if (Ustrncmp(arg+1, "qqR", 3) == 0 || Ustrncmp(arg+1, "qqS", 3) == 0)
2357 switchchar = arg[3];
2359 f.queue_2stage = TRUE;
2362 /* Make -r synonymous with -f, since it is a documented alias */
2364 else if (arg[1] == 'r') switchchar = 'f';
2366 /* Make -ov synonymous with -v */
2368 else if (Ustrcmp(arg, "-ov") == 0)
2374 /* deal with --option_aliases */
2375 else if (switchchar == '-')
2377 if (Ustrcmp(argrest, "help") == 0)
2379 usage_wanted = TRUE;
2382 else if (Ustrcmp(argrest, "version") == 0)
2389 /* High-level switch on active initial letter */
2394 /* sendmail uses -Ac and -Am to control which .cf file is used;
2397 if (!*argrest) { badarg = TRUE; break; }
2400 BOOL ignore = FALSE;
2405 if (*(argrest + 1) == '\0')
2409 if (!ignore) badarg = TRUE;
2413 /* -atrn <host> <domains> */
2415 if (Ustrcmp(argrest, "trn") == 0)
2418 atrn_mode = US"C"; /* Customer mode */
2420 /* The host could at this point have a port attached */
2421 atrn_host = exim_arg_copy(argv[++i], EXIM_DOMAINNAME_MAX, "-atrn");
2422 atrn_domains = exim_arg_copy(argv[++i], EXIM_DOMAINNAME_MAX*4,
2427 exim_fail("exim: host and domainlist expected after %s\n", argv[i]);
2431 /* -Btype is a sendmail option for 7bit/8bit setting. Exim is 8-bit clean
2432 so has no need of it. */
2435 if (!*argrest) i++; /* Skip over the type */
2441 receiving_message = FALSE; /* Reset TRUE for -bm, -bS, -bs below */
2445 /* -bd: Run in daemon mode, awaiting SMTP connections.
2446 -bdf: Ditto, but in the foreground.
2449 f.daemon_listen = f.daemon_scion = TRUE;
2450 if (*argrest == 'f') f.background_daemon = FALSE;
2451 else if (*argrest) badarg = TRUE;
2454 /* -be: Run in expansion test mode
2455 -bem: Ditto, but read a message from a file first
2458 expansion_test = checking = TRUE;
2459 if (*argrest == 'm')
2461 if (++i >= argc) { badarg = TRUE; break; }
2462 expansion_test_message = argv[i];
2465 if (*argrest) badarg = TRUE;
2468 /* -bF: Run system filter test */
2470 filter_test |= checking = FTEST_SYSTEM;
2471 if (*argrest) badarg = TRUE;
2472 else if (++i < argc) filter_test_sfile = argv[i];
2473 else exim_fail("exim: file name expected after %s\n", argv[i-1]);
2476 /* -bf: Run user filter test
2477 -bfd: Set domain for filter testing
2478 -bfl: Set local part for filter testing
2479 -bfp: Set prefix for filter testing
2480 -bfs: Set suffix for filter testing
2485 filter_test |= checking = FTEST_USER;
2486 if (++i < argc) filter_test_ufile = argv[i];
2487 else exim_fail("exim: file name expected after %s\n", argv[i-1]);
2492 exim_fail("exim: string expected after %s\n", arg);
2493 if (Ustrcmp(argrest, "d") == 0) ftest_domain = exim_str_fail_toolong(argv[i], EXIM_DOMAINNAME_MAX, "-bfd");
2494 else if (Ustrcmp(argrest, "l") == 0) ftest_localpart = exim_str_fail_toolong(argv[i], EXIM_LOCALPART_MAX, "-bfl");
2495 else if (Ustrcmp(argrest, "p") == 0) ftest_prefix = exim_str_fail_toolong(argv[i], EXIM_LOCALPART_MAX, "-bfp");
2496 else if (Ustrcmp(argrest, "s") == 0) ftest_suffix = exim_str_fail_toolong(argv[i], EXIM_LOCALPART_MAX, "-bfs");
2501 /* -bh: Host checking - an IP address must follow. */
2503 if ( (!*argrest || Ustrcmp(argrest, "c") == 0)
2506 sender_host_address = string_copy_taint(
2507 exim_str_fail_toolong(argv[i], EXIM_IPADDR_MAX, "-bh"),
2509 host_checking = checking = f.log_testing_mode = TRUE;
2510 f.host_checking_callout = *argrest == 'c';
2511 message_logs = FALSE;
2517 /* -bi: This option is used by sendmail to initialize *the* alias file,
2518 though it has the -oA option to specify a different file. Exim has no
2519 concept of *the* alias file, but since Sun's YP make script calls
2520 sendmail this way, some support must be provided. */
2522 if (!*argrest) bi_option = TRUE;
2526 /* -bI: provide information, of the type to follow after a colon.
2527 This is an Exim flag. */
2529 if (Ustrlen(argrest) >= 1 && *argrest == ':')
2531 const uschar * p = argrest+1;
2532 info_flag = CMDINFO_HELP;
2534 if (strcmpic(p, CUS"sieve") == 0)
2536 info_flag = CMDINFO_SIEVE;
2539 else if (strcmpic(p, CUS"dscp") == 0)
2541 info_flag = CMDINFO_DSCP;
2544 else if (strcmpic(p, CUS"help") == 0)
2550 /* -bm: Accept and deliver message - the default option. Reinstate
2551 receiving_message, which got turned off for all -b options.
2552 -bmalware: test the filename given for malware */
2554 if (!*argrest) receiving_message = TRUE;
2555 else if (Ustrcmp(argrest, "alware") == 0)
2557 if (++i >= argc) { badarg = TRUE; break; }
2559 malware_test_file = argv[i];
2564 /* -bnq: For locally originating messages, do not qualify unqualified
2565 addresses. In the envelope, this causes errors; in header lines they
2568 if (Ustrcmp(argrest, "q") == 0)
2570 f.allow_unqualified_sender = FALSE;
2571 f.allow_unqualified_recipient = FALSE;
2576 /* -bpxx: List the contents of the mail queue, in various forms. If
2577 the option is -bpc, just a queue count is needed. Otherwise, if the
2578 first letter after p is r, then order is random. */
2580 if (*argrest == 'c')
2583 if (*++argrest) badarg = TRUE;
2587 if (*argrest == 'r')
2588 list_queue_option = QL_UNSORTED, argrest++;
2590 list_queue_option = QL_BASIC;
2594 /* -bp: List the contents of the mail queue, top-level only */
2598 /* -bpu: List the contents of the mail queue, top-level undelivered */
2600 else if (Ustrcmp(argrest, "u") == 0) list_queue_option |= QL_UNDELIVERED_ONLY;
2602 /* -bpa: List the contents of the mail queue, including all delivered */
2604 else if (Ustrcmp(argrest, "a") == 0) list_queue_option |= QL_PLUS_GENERATED;
2606 /* -bpi: List only message IDs */
2608 else if (Ustrcmp(argrest, "i") == 0) list_queue_option |= QL_MSGID_ONLY;
2610 /* Unknown after -bp[r] */
2616 /* -bP: List the configuration variables given as the address list.
2617 Force -v, so configuration errors get displayed. */
2620 /* -bP config: we need to setup here, because later,
2621 when list_options is checked, the config is read already */
2624 else if (argv[i+1] && Ustrcmp(argv[i+1], "config") == 0)
2627 readconf_save_config(version_string);
2631 list_options = TRUE;
2632 debug_selector |= D_v;
2633 debug_file = stderr;
2637 /* -brt: Test retry configuration lookup */
2639 if (Ustrcmp(argrest, "t") == 0)
2642 test_retry_arg = i + 1;
2646 /* -brw: Test rewrite configuration */
2648 else if (Ustrcmp(argrest, "w") == 0)
2651 test_rewrite_arg = i + 1;
2657 /* -bS: Read SMTP commands on standard input, but produce no replies -
2658 all errors are reported by sending messages. */
2661 smtp_input = smtp_batched_input = receiving_message = TRUE;
2665 /* -bs: Read SMTP commands on standard input and produce SMTP replies
2666 on standard output. */
2668 if (!*argrest) smtp_input = receiving_message = TRUE;
2672 /* -bt: address testing mode */
2675 f.address_test_mode = checking = f.log_testing_mode = TRUE;
2679 /* -bv: verify addresses */
2682 verify_address_mode = checking = f.log_testing_mode = TRUE;
2684 /* -bvs: verify sender addresses */
2686 else if (Ustrcmp(argrest, "s") == 0)
2688 verify_address_mode = checking = f.log_testing_mode = TRUE;
2689 verify_as_sender = TRUE;
2694 /* -bV: Print version string and support details */
2698 printf("Exim version %s #%s built %s\n", version_string,
2699 version_cnumber, version_date);
2700 printf("%s\n", CS version_copyright);
2701 version_printed = TRUE;
2702 show_whats_supported(TRUE);
2703 f.log_testing_mode = TRUE;
2708 /* -bw: inetd wait mode, accept a listening socket as stdin */
2710 f.inetd_wait_mode = f.daemon_listen = f.daemon_scion = TRUE;
2711 f.background_daemon = FALSE;
2713 if ((inetd_wait_timeout = readconf_readtime(argrest, 0, FALSE)) <= 0)
2714 exim_fail("exim: bad time value %s: abandoned\n", argv[i]);
2725 /* -C: change configuration file list; ignore if it isn't really
2726 a change! Enforce a prefix check if required. */
2730 if (++i < argc) argrest = argv[i]; else { badarg = TRUE; break; }
2731 if (Ustrcmp(config_main_filelist, argrest) != 0)
2733 #ifdef ALT_CONFIG_PREFIX
2735 int len = Ustrlen(ALT_CONFIG_PREFIX);
2736 const uschar *list = argrest;
2738 /* The argv is untainted, so big_buffer (also untainted) is ok to use */
2739 while((filename = string_nextinlist(&list, &sep, big_buffer,
2741 if ( ( Ustrlen(filename) < len
2742 || Ustrncmp(filename, ALT_CONFIG_PREFIX, len) != 0
2743 || Ustrstr(filename, "/../") != NULL
2745 && (Ustrcmp(filename, "/dev/null") != 0 || real_uid != root_uid)
2747 exim_fail("-C Permission denied\n");
2749 if (real_uid != root_uid)
2751 #ifdef TRUSTED_CONFIG_LIST
2753 if (real_uid != exim_uid
2754 #ifdef CONFIGURE_OWNER
2755 && real_uid != config_uid
2758 f.trusted_config = FALSE;
2761 FILE *trust_list = Ufopen(TRUSTED_CONFIG_LIST, "rb");
2764 struct stat statbuf;
2766 if (fstat(fileno(trust_list), &statbuf) != 0 ||
2767 (statbuf.st_uid != root_uid /* owner not root */
2768 #ifdef CONFIGURE_OWNER
2769 && statbuf.st_uid != config_uid /* owner not the special one */
2772 (statbuf.st_gid != root_gid /* group not root */
2773 #ifdef CONFIGURE_GROUP
2774 && statbuf.st_gid != config_gid /* group not the special one */
2776 && (statbuf.st_mode & 020) != 0 /* group writeable */
2778 (statbuf.st_mode & 2) != 0) /* world writeable */
2780 f.trusted_config = FALSE;
2785 /* Well, the trust list at least is up to scratch... */
2787 uschar *trusted_configs[32];
2790 int old_pool = store_pool;
2791 store_pool = POOL_MAIN;
2793 reset_point = store_mark();
2794 while (Ufgets(big_buffer, big_buffer_size, trust_list))
2796 uschar * start = big_buffer, * nl;
2797 if (Uskip_whitespace(&start) != '/')
2799 if ((nl = Ustrchr(start, '\n')))
2801 trusted_configs[nr_configs++] = string_copy(start);
2802 if (nr_configs == nelem(trusted_configs))
2810 const uschar *list = argrest;
2812 while (f.trusted_config && (filename = string_nextinlist(&list,
2813 &sep, big_buffer, big_buffer_size)))
2815 for (i=0; i < nr_configs; i++)
2816 if (Ustrcmp(filename, trusted_configs[i]) == 0)
2818 if (i == nr_configs)
2820 f.trusted_config = FALSE;
2825 else /* No valid prefixes found in trust_list file. */
2826 f.trusted_config = FALSE;
2827 store_reset(reset_point);
2828 store_pool = old_pool;
2831 else /* Could not open trust_list file. */
2832 f.trusted_config = FALSE;
2835 /* Not root; don't trust config */
2836 f.trusted_config = FALSE;
2840 config_main_filelist = argrest;
2841 f.config_changed = TRUE;
2846 /* -D: set up a macro definition */
2849 #ifdef DISABLE_D_OPTION
2850 exim_fail("exim: -D is not available in this Exim binary\n");
2856 const uschar * s = argrest;
2859 Uskip_whitespace(&s);
2861 if (*s < 'A' || *s > 'Z')
2862 exim_fail("exim: macro name set by -D must start with "
2863 "an upper case letter\n");
2865 while (isalnum(*s) || *s == '_')
2867 if (ptr < sizeof(name)-1) name[ptr++] = *s;
2871 if (ptr == 0) { badarg = TRUE; break; }
2872 if (Uskip_whitespace(&s))
2874 if (*s++ != '=') { badarg = TRUE; break; }
2875 Uskip_whitespace(&s);
2878 for (m = macros_user; m; m = m->next)
2879 if (Ustrcmp(m->name, name) == 0)
2880 exim_fail("exim: duplicated -D in command line\n");
2882 m = macro_create(name, s, TRUE);
2884 if (clmacro_count >= MAX_CLMACROS)
2885 exim_fail("exim: too many -D options on command line\n");
2886 clmacros[clmacro_count++] =
2887 string_sprintf("-D%s=%s", m->name, m->replacement);
2894 /* -dropcr: Set this option. Now a no-op, retained for compatibility only. */
2896 if (Ustrcmp(argrest, "ropcr") == 0)
2898 /* drop_cr = TRUE; */
2901 /* -dp: Set up a debug pretrigger buffer with given size. */
2903 else if (Ustrcmp(argrest, "p") == 0)
2907 debug_pretrigger_setup(argv[i]);
2909 /* -dt: Set a debug trigger selector */
2911 else if (Ustrncmp(argrest, "t=", 2) == 0)
2912 dtrigger_selector = (unsigned int) Ustrtol(argrest + 2, NULL, 0);
2914 /* -d: Set debug level (see also -v below).
2915 If -dd is used, debugging subprocesses of the daemon is disabled. */
2919 /* Use an intermediate variable so that we don't set debugging while
2920 decoding the debugging bits. */
2922 unsigned int selector = D_default;
2925 if (*argrest == 'd')
2927 f.debug_daemon = TRUE;
2931 decode_bits(&selector, 1, debug_notall, argrest,
2932 debug_options, debug_options_count, US"debug", 0);
2933 debug_selector = selector;
2938 /* -E: This is a local error message. This option is not intended for
2939 external use at all, but is not restricted to trusted callers because it
2940 does no harm (just suppresses certain error messages) and if Exim is run
2941 not setuid root it won't always be trusted when it generates error
2942 messages using this option. If there is a message id following -E, point
2943 message_reference at it, for logging. */
2946 f.local_error_message = TRUE;
2947 if (mac_ismsgid(argrest)) message_reference = argrest;
2951 /* -ex: The vacation program calls sendmail with the undocumented "-eq"
2952 option, so it looks as if historically the -oex options are also callable
2953 without the leading -o. So we have to accept them. Before the switch,
2954 anything starting -oe has been converted to -e. Exim does not support all
2955 of the sendmail error options. */
2958 if (Ustrcmp(argrest, "e") == 0)
2960 arg_error_handling = ERRORS_SENDER;
2961 errors_sender_rc = EXIT_SUCCESS;
2963 else if (Ustrcmp(argrest, "m") == 0) arg_error_handling = ERRORS_SENDER;
2964 else if (Ustrcmp(argrest, "p") == 0) arg_error_handling = ERRORS_STDERR;
2965 else if (Ustrcmp(argrest, "q") == 0) arg_error_handling = ERRORS_STDERR;
2966 else if (Ustrcmp(argrest, "w") == 0) arg_error_handling = ERRORS_SENDER;
2971 /* -F: Set sender's full name, used instead of the gecos entry from
2972 the password file. Since users can usually alter their gecos entries,
2973 there's no security involved in using this instead. The data can follow
2974 the -F or be in the next argument. */
2978 if (++i < argc) argrest = argv[i]; else { badarg = TRUE; break; }
2979 originator_name = string_copy_taint(
2980 exim_str_fail_toolong(argrest, EXIM_HUMANNAME_MAX, "-F"),
2982 f.sender_name_forced = TRUE;
2986 /* -f: Set sender's address - this value is only actually used if Exim is
2987 run by a trusted user, or if untrusted_set_sender is set and matches the
2988 address, except that the null address can always be set by any user. The
2989 test for this happens later, when the value given here is ignored when not
2990 permitted. For an untrusted user, the actual sender is still put in Sender:
2991 if it doesn't match the From: header (unless no_local_from_check is set).
2992 The data can follow the -f or be in the next argument. The -r switch is an
2993 obsolete form of -f but since there appear to be programs out there that
2994 use anything that sendmail has ever supported, better accept it - the
2995 synonymizing is done before the switch above.
2997 At this stage, we must allow domain literal addresses, because we don't
2998 know what the setting of allow_domain_literals is yet. Ditto for trailing
2999 dots and strip_trailing_dot. */
3003 int dummy_start, dummy_end;
3006 if (i+1 < argc) argrest = argv[++i]; else { badarg = TRUE; break; }
3007 (void) exim_str_fail_toolong(argrest, EXIM_DISPLAYMAIL_MAX, "-f");
3010 uschar * s = store_get(1, GET_UNTAINTED); /* Ensure writeable memory */
3016 const uschar * temp = argrest + Ustrlen(argrest) - 1;
3017 while (temp >= argrest && isspace(*temp)) temp--;
3018 if (temp >= argrest && *temp == '.') f_end_dot = TRUE;
3019 allow_domain_literals = TRUE;
3020 strip_trailing_dot = TRUE;
3022 allow_utf8_domains = TRUE;
3024 if (!(sender_address = parse_extract_address(argrest, &errmess,
3025 &dummy_start, &dummy_end, &sender_address_domain, TRUE)))
3026 exim_fail("exim: bad -f address \"%s\": %s\n", argrest, errmess);
3028 sender_address = string_copy_taint(sender_address, GET_TAINTED);
3030 message_smtputf8 = string_is_utf8(sender_address);
3031 allow_utf8_domains = FALSE;
3033 allow_domain_literals = FALSE;
3034 strip_trailing_dot = FALSE;
3036 f.sender_address_forced = TRUE;
3040 /* -G: sendmail invocation to specify that it's a gateway submission and
3041 sendmail may complain about problems instead of fixing them.
3042 We make it equivalent to an ACL "control = suppress_local_fixups" and do
3043 not at this time complain about problems. */
3049 /* -h: Set the hop count for an incoming message. Exim does not currently
3050 support this; it always computes it by counting the Received: headers.
3051 To put it in will require a change to the spool header file format. */
3055 if (++i < argc) argrest = argv[i]; else { badarg = TRUE; break; }
3056 if (!isdigit(*argrest)) badarg = TRUE;
3060 /* -i: Set flag so dot doesn't end non-SMTP input (same as -oi, seems
3061 not to be documented for sendmail but mailx (at least) uses it) */
3064 if (!*argrest) f.dot_ends = FALSE; else badarg = TRUE;
3068 /* -L: set the identifier used for syslog; equivalent to setting
3069 syslog_processname in the config file, but needs to be an admin option. */
3073 if (++i < argc) argrest = argv[i]; else { badarg = TRUE; break; }
3074 if ((sz = Ustrlen(argrest)) > 32)
3075 exim_fail("exim: the -L syslog name is too long: \"%s\"\n", argrest);
3077 exim_fail("exim: the -L syslog name is too short\n");
3078 cmdline_syslog_name = string_copy_taint(argrest, GET_TAINTED);
3082 receiving_message = FALSE;
3084 /* -MC: continue delivery of another message via an existing open
3085 file descriptor. This option is used for an internal call by the
3086 smtp transport when there is a pending message waiting to go to an
3087 address to which it has got a connection. Five subsequent arguments are
3088 required: transport name, host name, IP address, sequence number, and
3089 message_id. Transports may decline to create new processes if the sequence
3090 number gets too big. The channel is stdin. This (-MC) must be the last
3091 argument. There's a subsequent check that the real-uid is privileged.
3093 If we are running in the test harness. delay for a bit, to let the process
3094 that set this one up complete. This makes for repeatability of the logging,
3097 if (Ustrcmp(argrest, "C") == 0)
3099 union sockaddr_46 interface_sock;
3100 EXIM_SOCKLEN_T size = sizeof(interface_sock);
3103 exim_fail("exim: too many or too few arguments after -MC\n");
3105 if (msg_action_arg >= 0)
3106 exim_fail("exim: incompatible arguments\n");
3108 continue_transport = string_copy_taint(
3109 exim_str_fail_toolong(argv[++i], EXIM_DRIVERNAME_MAX, "-C internal transport"),
3111 continue_hostname = string_copy_taint(
3112 exim_str_fail_toolong(argv[++i], EXIM_HOSTNAME_MAX, "-C internal hostname"),
3114 continue_host_address = string_copy_taint(
3115 exim_str_fail_toolong(argv[++i], EXIM_IPADDR_MAX, "-C internal hostaddr"),
3117 continue_sequence = Uatoi(argv[++i]);
3118 msg_action = MSG_DELIVER;
3119 msg_action_arg = ++i;
3120 forced_delivery = TRUE;
3121 queue_run_pid = passed_qr_pid;
3122 queue_run_pipe = passed_qr_pipe;
3124 if (!mac_ismsgid(argv[i]))
3125 exim_fail("exim: malformed message id %s after -MC option\n",
3128 /* Set up $sending_ip_address and $sending_port, unless proxied */
3130 if (!continue_proxy_cipher)
3131 if (getsockname(fileno(stdin), (struct sockaddr *)(&interface_sock),
3133 sending_ip_address = host_ntoa(-1, &interface_sock, NULL,
3136 exim_fail("exim: getsockname() failed after -MC option: %s\n",
3139 testharness_pause_ms(500);
3143 else if (*argrest == 'C' && argrest[1] && !argrest[2])
3147 /* -MCA: set the smtp_authenticated flag; this is useful only when it
3148 precedes -MC (see above). The flag indicates that the host to which
3149 Exim is connected has accepted an AUTH sequence. */
3151 case 'A': f.smtp_authenticated = TRUE; break;
3153 /* -MCD: set the smtp_use_dsn flag; this indicates that the host
3154 that exim is connected to supports the esmtp extension DSN */
3156 case 'D': smtp_peer_options |= OPTION_DSN; break;
3158 /* -MCd: for debug, set a process-purpose string */
3160 case 'd': if (++i < argc)
3161 process_purpose = string_copy_taint(
3162 exim_str_fail_toolong(argv[i], EXIM_DRIVERNAME_MAX, "-MCd"),
3167 /* -MCG: set the queue name, to a non-default value. Arguably, anything
3168 from the commandline should be tainted - but we will need an untainted
3169 value for the spoolfile when doing a -odi delivery process. */
3171 case 'G': if (++i < argc) queue_name = string_copy_taint(
3172 exim_str_fail_toolong(argv[i], EXIM_DRIVERNAME_MAX, "-MCG"),
3177 /* -MCK: the peer offered CHUNKING. Must precede -MC */
3179 case 'K': smtp_peer_options |= OPTION_CHUNKING; break;
3181 #ifndef DISABLE_ESMTP_LIMITS
3182 /* -MCL: peer used LIMITS RCPTMAX and/or RCPTDOMAINMAX */
3183 case 'L': if (++i < argc) continue_limit_mail = Uatoi(argv[i]);
3185 if (++i < argc) continue_limit_rcpt = Uatoi(argv[i]);
3187 if (++i < argc) continue_limit_rcptdom = Uatoi(argv[i]);
3192 /* -MCP: set the smtp_use_pipelining flag; this is useful only when
3193 it preceded -MC (see above) */
3195 case 'P': smtp_peer_options |= OPTION_PIPE; break;
3197 #ifdef SUPPORT_SOCKS
3198 /* -MCp: Socks proxy in use; nearside IP, port, external IP, port */
3199 case 'p': proxy_session = TRUE;
3202 proxy_local_address = string_copy_taint(argv[i], GET_TAINTED);
3205 proxy_local_port = Uatoi(argv[i]);
3208 proxy_external_address = string_copy_taint(argv[i], GET_TAINTED);
3211 proxy_external_port = Uatoi(argv[i]);
3217 /* -MCQ: pass on the pid of the queue-running process that started
3218 this chain of deliveries and the fd of its synchronizing pipe; this
3219 is useful only when it precedes -MC (see above) */
3221 case 'Q': if (++i < argc) passed_qr_pid = (pid_t)(Uatol(argv[i]));
3223 if (++i < argc) passed_qr_pipe = (int)(Uatol(argv[i]));
3227 /* -MCq: do a quota check on the given recipient for the given size
3228 of message. Separate from -MC. */
3229 case 'q': rcpt_verify_quota = TRUE;
3230 if (++i < argc) message_size = Uatoi(argv[i]);
3234 /* -MCS: set the smtp_use_size flag; this is useful only when it
3235 precedes -MC (see above) */
3237 case 'S': smtp_peer_options |= OPTION_SIZE; break;
3240 /* -MCs: used with -MCt; SNI was sent */
3241 /* -MCr: ditto, DANE */
3244 case 's': if (++i < argc)
3246 continue_proxy_sni = string_copy_taint(
3247 exim_str_fail_toolong(argv[i], EXIM_HOSTNAME_MAX, "-MCr/-MCs"),
3249 if (argrest[1] == 'r') continue_proxy_dane = TRUE;
3254 /* -MCt: similar to -MCT below but the connection is still open
3255 via a proxy process which handles the TLS context and coding.
3256 Require three arguments for the proxied local address and port,
3257 and the TLS cipher. */
3259 case 't': if (++i < argc)
3260 sending_ip_address = string_copy_taint(
3261 exim_str_fail_toolong(argv[i], EXIM_IPADDR_MAX, "-MCt IP"),
3265 sending_port = (int)(Uatol(argv[i]));
3268 continue_proxy_cipher = string_copy_taint(
3269 exim_str_fail_toolong(argv[i], EXIM_CIPHERNAME_MAX, "-MCt cipher"),
3274 /* -MCT: set the tls_offered flag; this is useful only when it
3275 precedes -MC (see above). The flag indicates that the host to which
3276 Exim is connected has offered TLS support. */
3278 case 'T': smtp_peer_options |= OPTION_TLS; break;
3281 default: badarg = TRUE; break;
3286 /* -M[x]: various operations on the following list of message ids:
3287 -M deliver the messages, ignoring next retry times and thawing
3288 -Mc deliver the messages, checking next retry times, no thawing
3289 -Mf freeze the messages
3290 -Mg give up on the messages
3291 -Mt thaw the messages
3292 -Mrm remove the messages
3293 In the above cases, this must be the last option. There are also the
3294 following options which are followed by a single message id, and which
3295 act on that message. Some of them use the "recipient" addresses as well.
3296 -Mar add recipient(s)
3297 -MG move to a different queue
3298 -Mmad mark all recipients delivered
3299 -Mmd mark recipients(s) delivered
3301 -Mset load a message for use with -be
3303 -Mvc show copy (of whole message, in RFC 2822 format)
3310 msg_action = MSG_DELIVER;
3311 forced_delivery = f.deliver_force_thaw = TRUE;
3313 else if (Ustrcmp(argrest, "ar") == 0)
3315 msg_action = MSG_ADD_RECIPIENT;
3316 one_msg_action = TRUE;
3318 else if (Ustrcmp(argrest, "c") == 0) msg_action = MSG_DELIVER;
3319 else if (Ustrcmp(argrest, "es") == 0)
3321 msg_action = MSG_EDIT_SENDER;
3322 one_msg_action = TRUE;
3324 else if (Ustrcmp(argrest, "f") == 0) msg_action = MSG_FREEZE;
3325 else if (Ustrcmp(argrest, "g") == 0)
3327 msg_action = MSG_DELIVER;
3328 deliver_give_up = TRUE;
3330 else if (Ustrcmp(argrest, "G") == 0)
3332 msg_action = MSG_SETQUEUE;
3333 queue_name_dest = string_copy_taint(
3334 exim_str_fail_toolong(next_argv(argv, &i, argc, arg),
3335 EXIM_DRIVERNAME_MAX, "-MG"),
3338 else if (Ustrcmp(argrest, "mad") == 0) msg_action = MSG_MARK_ALL_DELIVERED;
3339 else if (Ustrcmp(argrest, "md") == 0)
3341 msg_action = MSG_MARK_DELIVERED;
3342 one_msg_action = TRUE;
3344 else if (Ustrcmp(argrest, "rm") == 0) msg_action = MSG_REMOVE;
3345 else if (Ustrcmp(argrest, "set") == 0)
3347 msg_action = MSG_LOAD;
3348 one_msg_action = TRUE;
3350 else if (Ustrcmp(argrest, "t") == 0) msg_action = MSG_THAW;
3351 else if (Ustrcmp(argrest, "vb") == 0)
3353 msg_action = MSG_SHOW_BODY;
3354 one_msg_action = TRUE;
3356 else if (Ustrcmp(argrest, "vc") == 0)
3358 msg_action = MSG_SHOW_COPY;
3359 one_msg_action = TRUE;
3361 else if (Ustrcmp(argrest, "vh") == 0)
3363 msg_action = MSG_SHOW_HEADER;
3364 one_msg_action = TRUE;
3366 else if (Ustrcmp(argrest, "vl") == 0)
3368 msg_action = MSG_SHOW_LOG;
3369 one_msg_action = TRUE;
3371 else { badarg = TRUE; break; }
3373 /* All the -Mxx options require at least one message id. */
3375 msg_action_arg = i + 1;
3376 if (msg_action_arg >= argc)
3377 exim_fail("exim: no message ids given after %s option\n", arg);
3379 /* Some require only message ids to follow */
3381 if (!one_msg_action)
3383 for (int j = msg_action_arg; j < argc; j++) if (!mac_ismsgid(argv[j]))
3384 exim_fail("exim: malformed message id %s after %s option\n",
3386 goto END_ARG; /* Remaining args are ids */
3389 /* Others require only one message id, possibly followed by addresses,
3390 which will be handled as normal arguments. */
3394 if (!mac_ismsgid(argv[msg_action_arg]))
3395 exim_fail("exim: malformed message id %s after %s option\n",
3396 argv[msg_action_arg], arg);
3402 /* Some programs seem to call the -om option without the leading o;
3403 for sendmail it askes for "me too". Exim always does this. */
3406 if (*argrest) badarg = TRUE;
3410 /* -N: don't do delivery - a debugging option that stops transports doing
3411 their thing. It implies debugging at the D_v level. */
3416 f.dont_deliver = TRUE;
3417 debug_selector |= D_v;
3418 debug_file = stderr;
3424 /* -n: This means "don't alias" in sendmail, apparently.
3425 For normal invocations, it has no effect.
3426 It may affect some other options. */
3432 /* -O: Just ignore it. In sendmail, apparently -O option=value means set
3433 option to the specified value. This form uses long names. We need to handle
3434 -O option=value and -Ooption=value. */
3439 exim_fail("exim: string expected after -O\n");
3445 /* -oA: Set an argument for the bi command (sendmail's "alternate alias
3448 if (!*(alias_arg = argrest))
3449 if (i+1 < argc) alias_arg = argv[++i];
3450 else exim_fail("exim: string expected after -oA\n");
3453 /* -oB: Set a connection message max value for remote deliveries */
3456 const uschar * p = argrest;
3458 if (i+1 < argc && isdigit((argv[i+1][0])))
3462 connection_max_messages = 1;
3469 exim_fail("exim: number expected after -oB\n");
3470 connection_max_messages = Uatoi(p);
3475 /* -odb: background delivery */
3478 if (Ustrcmp(argrest, "b") == 0)
3480 f.synchronous_delivery = FALSE;
3481 arg_queue_only = FALSE;
3482 queue_only_set = TRUE;
3485 /* -odd: testsuite-only: add no inter-process delays */
3487 else if (Ustrcmp(argrest, "d") == 0)
3488 f.testsuite_delays = FALSE;
3490 /* -odf: foreground delivery (smail-compatible option); same effect as
3491 -odi: interactive (synchronous) delivery (sendmail-compatible option)
3494 else if (Ustrcmp(argrest, "f") == 0 || Ustrcmp(argrest, "i") == 0)
3496 f.synchronous_delivery = TRUE;
3497 arg_queue_only = FALSE;
3498 queue_only_set = TRUE;
3501 /* -odq: queue only */
3503 else if (Ustrcmp(argrest, "q") == 0)
3505 f.synchronous_delivery = FALSE;
3506 arg_queue_only = TRUE;
3507 queue_only_set = TRUE;
3510 /* -odqs: queue SMTP only - do local deliveries and remote routing,
3511 but no remote delivery */
3513 else if (Ustrcmp(argrest, "qs") == 0)
3515 f.queue_smtp = TRUE;
3516 arg_queue_only = FALSE;
3517 queue_only_set = TRUE;
3522 /* -oex: Sendmail error flags. As these are also accepted without the
3523 leading -o prefix, for compatibility with vacation and other callers,
3524 they are handled with -e above. */
3526 /* -oi: Set flag so dot doesn't end non-SMTP input (same as -i)
3527 -oitrue: Another sendmail syntax for the same */
3530 if (!*argrest || Ustrcmp(argrest, "true") == 0)
3535 /* -oM*: Set various characteristics for an incoming message; actually
3536 acted on for trusted callers only. */
3541 exim_fail("exim: data expected after -oM%s\n", argrest);
3543 /* -oMa: Set sender host address */
3545 if (Ustrcmp(argrest, "a") == 0)
3546 sender_host_address = string_copy_taint(
3547 exim_str_fail_toolong(next_argv(argv, &i, argc, arg),
3548 EXIM_IPADDR_MAX, "-oMa"), GET_TAINTED);
3550 /* -oMaa: Set authenticator name */
3552 else if (Ustrcmp(argrest, "aa") == 0)
3553 sender_host_authenticated = string_copy_taint(
3554 exim_str_fail_toolong(next_argv(argv, &i, argc, arg),
3555 EXIM_DRIVERNAME_MAX, "-oMaa"), GET_TAINTED);
3557 /* -oMas: setting authenticated sender */
3559 else if (Ustrcmp(argrest, "as") == 0)
3560 authenticated_sender = string_copy_taint(
3561 exim_str_fail_toolong(next_argv(argv, &i, argc, arg),
3562 EXIM_EMAILADDR_MAX, "-oMas"), GET_TAINTED);
3564 /* -oMai: setting authenticated id */
3566 else if (Ustrcmp(argrest, "ai") == 0)
3567 authenticated_id = string_copy_taint(
3568 exim_str_fail_toolong(next_argv(argv, &i, argc, arg),
3569 EXIM_EMAILADDR_MAX, "-oMai"), GET_TAINTED);
3571 /* -oMi: Set incoming interface address */
3573 else if (Ustrcmp(argrest, "i") == 0)
3574 interface_address = string_copy_taint(
3575 exim_str_fail_toolong(next_argv(argv, &i, argc, arg),
3576 EXIM_IPADDR_MAX, "-oMi"), GET_TAINTED);
3578 /* -oMm: Message reference */
3580 else if (Ustrcmp(argrest, "m") == 0)
3582 if (!mac_ismsgid(argv[i+1]))
3583 exim_fail("-oMm must be a valid message ID\n");
3584 if (!f.trusted_config)
3585 exim_fail("-oMm must be called by a trusted user/config\n");
3586 message_reference = next_argv(argv, &i, argc, arg);
3589 /* -oMr: Received protocol */
3591 else if (Ustrcmp(argrest, "r") == 0)
3593 if (received_protocol)
3594 exim_fail("received_protocol is set already\n");
3596 if (++i >= argc) badarg = TRUE;
3598 received_protocol = string_copy_taint(
3599 exim_str_fail_toolong(argv[i], EXIM_DRIVERNAME_MAX, "-oMr"),
3602 /* -oMs: Set sender host name */
3604 else if (Ustrcmp(argrest, "s") == 0)
3605 if (++i >= argc) badarg = TRUE;
3607 sender_host_name = string_copy_taint(
3608 exim_str_fail_toolong(argv[i], EXIM_HOSTNAME_MAX, "-oMs"),
3611 /* -oMt: Set sender ident */
3613 else if (Ustrcmp(argrest, "t") == 0)
3614 if (++i >= argc) badarg = TRUE;
3617 sender_ident_set = TRUE;
3618 sender_ident = string_copy_taint(
3619 exim_str_fail_toolong(argv[i], EXIM_IDENTUSER_MAX, "-oMt"),
3623 /* Else a bad argument */
3630 /* -om: Me-too flag for aliases. Exim always does this. Some programs
3631 seem to call this as -m (undocumented), so that is also accepted (see
3633 /* -oo: An ancient flag for old-style addresses which still seems to
3634 crop up in some calls (see in SCO). */
3638 if (*argrest) badarg = TRUE;
3641 /* -oP <name>: set pid file path for daemon
3642 -oPX: delete pid file of daemon */
3645 if (!f.running_in_test_harness && real_uid != root_uid && real_uid != exim_uid)
3646 exim_fail("exim: only uid=%d or uid=%d can use -oP and -oPX "
3647 "(uid=%d euid=%d | %d)\n",
3648 root_uid, exim_uid, getuid(), geteuid(), real_uid);
3650 if (++i < argc) override_pid_file_path = argv[i];
3652 else if (Ustrcmp(argrest, "X") == 0) delete_pid_file();
3657 /* -or <n>: set timeout for non-SMTP acceptance
3658 -os <n>: set timeout for SMTP acceptance */
3663 int * tp = argrest[-1] == 'r'
3664 ? &arg_receive_timeout : &arg_smtp_receive_timeout;
3666 *tp = readconf_readtime(argrest, 0, FALSE);
3667 else if (i+1 < argc)
3668 *tp = readconf_readtime(argv[++i], 0, FALSE);
3671 exim_fail("exim: bad time value %s: abandoned\n", argv[i]);
3675 /* -oX <list>: Override local_interfaces and/or default daemon ports */
3676 /* Limits: Is there a real limit we want here? 1024 is very arbitrary. */
3679 if (*argrest || ++i >= argc) badarg = TRUE;
3680 else override_local_interfaces = string_copy_taint(
3681 exim_str_fail_toolong(argv[i], 1024, "-oX"), GET_TAINTED);
3684 /* -oY: Override creation of daemon notifier socket */
3687 if (*argrest) badarg = TRUE;
3688 else f.notifier_socket_en = FALSE;
3691 /* Unknown -o argument */
3699 /* -ps: force Perl startup; -pd force delayed Perl startup */
3703 if (*argrest == 's' && argrest[1] == 0)
3705 perl_start_option = 1;
3708 if (*argrest == 'd' && argrest[1] == 0)
3710 perl_start_option = -1;
3715 /* -panythingelse is taken as the Sendmail-compatible argument -prval:sval,
3716 which sets the host protocol and host name */
3719 argrest = next_argv(argv, &i, argc, arg);
3723 uschar * hn = Ustrchr(argrest, ':');
3725 if (received_protocol)
3726 exim_fail("received_protocol is set already\n");
3729 received_protocol = string_copy_taint(
3730 exim_str_fail_toolong(argrest, EXIM_DRIVERNAME_MAX, "-p<protocol>"),
3734 (void) exim_str_fail_toolong(argrest, (EXIM_DRIVERNAME_MAX+1+EXIM_HOSTNAME_MAX), "-p<protocol>:<host>");
3735 received_protocol = string_copyn_taint(argrest, hn - argrest, GET_TAINTED);
3736 sender_host_name = string_copy_taint(hn + 1, GET_TAINTED);
3741 /* -q: set up queue runs */
3745 BOOL two_stage, first_del, force, thaw = FALSE, local;
3747 receiving_message = FALSE;
3749 /* -qq...: Do queue runs in a 2-stage manner */
3751 if ((two_stage = *argrest == 'q'))
3754 /* -qi...: Do only first (initial) deliveries */
3756 if ((first_del = *argrest == 'i'))
3759 /* -qf...: Run the queue, forcing deliveries
3760 -qff..: Ditto, forcing thawing as well */
3762 if ((force = *argrest == 'f'))
3763 if ((thaw = *++argrest == 'f'))
3766 /* -q[f][f]l...: Run the queue only on local deliveries */
3768 if ((local = *argrest == 'l'))
3771 /* -q[f][f][l][G<name>]... Work on the named queue */
3773 if (*argrest == 'G')
3776 for (argrest++, i = 0; argrest[i] && argrest[i] != '/'; ) i++;
3777 exim_len_fail_toolong(i, EXIM_DRIVERNAME_MAX, "-q*G<name>");
3778 queue_name = string_copyn(argrest, i);
3780 if (*argrest == '/') argrest++;
3783 /* -q[f][f][l][G<name>]: Run the queue, optionally forced, optionally local
3784 only, optionally named, optionally starting from a given message id. */
3786 if (!(list_queue || count_queue))
3791 && (i + 1 >= argc || argv[i+1][0] == '-' || mac_ismsgid(argv[i+1])))
3793 q = alloc_onetime_qrunner();
3794 if (i+1 < argc && mac_ismsgid(argv[i+1]))
3795 start_queue_run_id = string_copy_taint(argv[++i], GET_TAINTED);
3796 if (i+1 < argc && mac_ismsgid(argv[i+1]))
3797 stop_queue_run_id = string_copy_taint(argv[++i], GET_TAINTED);
3800 /* -q[f][f][l][G<name>/]<n>: Run the queue at regular intervals, optionally
3801 forced, optionally local only, optionally named. */
3808 if (*argrest) s = argrest;
3809 else if (++i < argc) { badarg = TRUE; break; }
3812 if ((intvl = readconf_readtime(s, 0, FALSE)) <= 0)
3813 exim_fail("exim: bad time value %s: abandoned\n", argv[i]);
3815 for (qrunner * qq = qrunners; qq; qq = qq->next)
3816 if ( queue_name && qq->name && Ustrcmp(queue_name, qq->name) == 0
3817 || !queue_name && !qq->name)
3818 exim_fail("exim: queue-runner specified more than once\n");
3820 q = alloc_qrunner();
3821 q->interval = intvl;
3824 q->name = *queue_name ? queue_name : NULL; /* will be NULL for the default queue */
3825 q->queue_run_force = force;
3826 q->deliver_force_thaw = thaw;
3827 q->queue_run_first_delivery = first_del;
3828 q->queue_run_local = local;
3829 q->queue_2stage = two_stage;
3836 case 'R': /* Synonymous with -qR... */
3837 case 'S': /* Synonymous with -qS... */
3839 const uschar * tainted_selectstr;
3842 receiving_message = FALSE;
3844 /* -Rf: As -R (below) but force all deliveries,
3845 -Rff: Ditto, but also thaw all frozen messages,
3846 -Rr: String is regex
3847 -Rrf: Regex and force
3848 -Rrff: Regex and force and thaw
3850 -S...: Like -R but works on sender.
3852 in all cases provided there are no further characters in this
3855 if (!qrunners) alloc_onetime_qrunner();
3856 qrunners->queue_2stage = f.queue_2stage;
3858 for (int i = 0; i < nelem(rsopts); i++)
3859 if (Ustrcmp(argrest, rsopts[i]) == 0)
3861 if (i != 2) qrunners->queue_run_force = TRUE;
3863 if (switchchar == 'R')
3864 f.deliver_selectstring_regex = TRUE;
3866 f.deliver_selectstring_sender_regex = TRUE;
3867 if (i == 1 || i == 4) qrunners->deliver_force_thaw = TRUE;
3868 argrest += Ustrlen(rsopts[i]);
3871 /* -R or -S: Set string to match in addresses for forced queue run to
3872 pick out particular messages. */
3874 /* Avoid attacks from people providing very long strings, and do so before
3877 tainted_selectstr = argrest;
3878 else if (i+1 < argc)
3879 tainted_selectstr = argv[++i];
3881 exim_fail("exim: string expected after %s\n", switchchar == 'R' ? "-R" : "-S");
3883 s = string_copy_taint(
3884 exim_str_fail_toolong(tainted_selectstr, EXIM_EMAILADDR_MAX, "-R"),
3887 if (switchchar == 'R')
3888 deliver_selectstring = s;
3890 deliver_selectstring_sender = s;
3895 /* -r: an obsolete synonym for -f (see above) */
3897 /* -Tqt is an option that is exclusively for use by the testing suite.
3898 It is not recognized in other circumstances. It allows for the setting up
3899 of explicit "queue times" so that various warning/retry things can be
3900 tested. Otherwise variability of clock ticks etc. cause problems. */
3903 if (f.running_in_test_harness && Ustrcmp(argrest, "qt") == 0 && ++i < argc)
3904 fudged_queue_times = string_copy_taint(argv[i], GET_TAINTED);
3909 /* -t: Set flag to extract recipients from body of message. */
3912 if (!*argrest) extract_recipients = TRUE;
3914 /* -ti: Set flag to extract recipients from body of message, and also
3915 specify that dot does not end the message. */
3917 else if (Ustrcmp(argrest, "i") == 0)
3919 extract_recipients = TRUE;
3923 /* -tls-on-connect: don't wait for STARTTLS (for old clients) */
3926 else if (Ustrcmp(argrest, "ls-on-connect") == 0) tls_in.on_connect = TRUE;
3933 /* -U: This means "initial user submission" in sendmail, apparently. The
3934 doc claims that in future sendmail may refuse syntactically invalid
3935 messages instead of fixing them. For the moment, we just ignore it. */
3941 /* -v: verify things - this is a very low-level debugging */
3946 debug_selector |= D_v;
3947 debug_file = stderr;
3953 /* -x: AIX uses this to indicate some fancy 8-bit character stuff:
3955 The -x flag tells the sendmail command that mail from a local
3956 mail program has National Language Support (NLS) extended characters
3957 in the body of the mail item. The sendmail command can send mail with
3958 extended NLS characters across networks that normally corrupts these
3961 As Exim is 8-bit clean, it just ignores this flag. */
3964 if (*argrest) badarg = TRUE;
3967 /* -X: in sendmail: takes one parameter, logfile, and sends debugging
3968 logs to that file. We swallow the parameter and otherwise ignore it. */
3973 exim_fail("exim: string expected after -X\n");
3976 /* -z: a line of text to log */
3981 log_oneline = string_copy_taint(
3982 exim_str_fail_toolong(argv[i], 2048, "-z logtext"),
3985 exim_fail("exim: file name expected after %s\n", argv[i-1]);
3988 /* All other initial characters are errors */
3993 } /* End of high-level switch statement */
3995 /* Failed to recognize the option, or syntax error */
3998 exim_fail("exim abandoned: unknown, malformed, or incomplete "
3999 "option %s\n", arg);
4003 /* If -R or -S have been specified without -q, assume a single queue run. */
4005 if ((deliver_selectstring || deliver_selectstring_sender) && !qrunners)
4006 alloc_onetime_qrunner();
4010 store_pool = old_pool;
4013 /* If usage_wanted is set we call the usage function - which never returns */
4014 if (usage_wanted) exim_usage(called_as);
4016 /* Arguments have been processed. Check for incompatibilities. */
4017 if ( (smtp_input || extract_recipients || recipients_arg < argc)
4018 && ( f.daemon_listen || qrunners || bi_option
4019 || test_retry_arg >= 0 || test_rewrite_arg >= 0
4020 || filter_test != FTEST_NONE
4021 || msg_action_arg > 0 && !one_msg_action
4023 || msg_action_arg > 0
4024 && ( f.daemon_listen || is_multiple_qrun() || list_options
4025 || checking && msg_action != MSG_LOAD
4026 || bi_option || test_retry_arg >= 0 || test_rewrite_arg >= 0
4028 || (f.daemon_listen || is_multiple_qrun())
4029 && ( sender_address || list_options || list_queue || checking
4032 || f.daemon_listen && is_onetime_qrun()
4033 || f.inetd_wait_mode && qrunners
4035 && ( checking || smtp_input || extract_recipients
4036 || filter_test != FTEST_NONE || bi_option
4038 || verify_address_mode
4039 && ( f.address_test_mode || smtp_input || extract_recipients
4040 || filter_test != FTEST_NONE || bi_option
4042 || f.address_test_mode
4043 && ( smtp_input || extract_recipients || filter_test != FTEST_NONE
4047 && (sender_address || filter_test != FTEST_NONE || extract_recipients)
4048 || deliver_selectstring && !qrunners
4049 || msg_action == MSG_LOAD && (!expansion_test || expansion_test_message)
4051 && ( f.daemon_listen || expansion_test || filter_test != FTEST_NONE
4052 || checking /* || bi_option || info_stdout || receiving_message
4053 || malware_test_file || list_queue || list_config || list_options
4054 || version_printed || msg_action_arg > 0 || qrunners
4058 exim_fail("exim: incompatible command-line options or arguments\n");
4060 /* If debugging is set up, set the file and the file descriptor to pass on to
4061 child processes. It should, of course, be 2 for stderr. Also, force the daemon
4062 to run in the foreground. */
4064 if (debug_selector != 0)
4066 debug_file = stderr;
4067 debug_fd = fileno(debug_file);
4068 f.background_daemon = FALSE;
4069 testharness_pause_ms(100); /* lets caller finish */
4070 if (debug_selector != D_v) /* -v only doesn't show this */
4072 debug_printf("Exim version %s uid=%ld gid=%ld pid=%d D=%x\n",
4073 version_string, (long int)real_uid, (long int)real_gid, (int)getpid(),
4075 if (!version_printed)
4076 show_whats_supported(FALSE);
4080 /* When started with root privilege, ensure that the limits on the number of
4081 open files and the number of processes (where that is accessible) are
4082 sufficiently large, or are unset, in case Exim has been called from an
4083 environment where the limits are screwed down. Not all OS have the ability to
4084 change some of these limits. */
4088 DEBUG(D_any) debug_print_ids(US"Exim has no root privilege:");
4094 #ifdef RLIMIT_NOFILE
4095 if (getrlimit(RLIMIT_NOFILE, &rlp) < 0)
4097 log_write(0, LOG_MAIN|LOG_PANIC, "getrlimit(RLIMIT_NOFILE) failed: %s",
4099 rlp.rlim_cur = rlp.rlim_max = 0;
4102 /* I originally chose 1000 as a nice big number that was unlikely to
4103 be exceeded. It turns out that some older OS have a fixed upper limit of
4106 if (rlp.rlim_cur < 1000)
4108 rlp.rlim_cur = rlp.rlim_max = 1000;
4109 if (setrlimit(RLIMIT_NOFILE, &rlp) < 0)
4111 rlp.rlim_cur = rlp.rlim_max = 256;
4112 if (setrlimit(RLIMIT_NOFILE, &rlp) < 0)
4113 log_write(0, LOG_MAIN|LOG_PANIC, "setrlimit(RLIMIT_NOFILE) failed: %s",
4120 if (getrlimit(RLIMIT_NPROC, &rlp) < 0)
4122 log_write(0, LOG_MAIN|LOG_PANIC, "getrlimit(RLIMIT_NPROC) failed: %s",
4124 rlp.rlim_cur = rlp.rlim_max = 0;
4127 # ifdef RLIM_INFINITY
4128 if (rlp.rlim_cur != RLIM_INFINITY && rlp.rlim_cur < 1000)
4130 rlp.rlim_cur = rlp.rlim_max = RLIM_INFINITY;
4132 if (rlp.rlim_cur < 1000)
4134 rlp.rlim_cur = rlp.rlim_max = 1000;
4136 if (setrlimit(RLIMIT_NPROC, &rlp) < 0)
4137 log_write(0, LOG_MAIN|LOG_PANIC, "setrlimit(RLIMIT_NPROC) failed: %s",
4143 /* Exim is normally entered as root (but some special configurations are
4144 possible that don't do this). However, it always spins off sub-processes that
4145 set their uid and gid as required for local delivery. We don't want to pass on
4146 any extra groups that root may belong to, so we want to get rid of them all at
4149 We need to obey setgroups() at this stage, before possibly giving up root
4150 privilege for a changed configuration file, but later on we might need to
4151 check on the additional groups for the admin user privilege - can't do that
4152 till after reading the config, which might specify the exim gid. Therefore,
4153 save the group list here first. */
4155 if ((group_count = getgroups(nelem(group_list), group_list)) < 0)
4156 exim_fail("exim: getgroups() failed: %s\n", strerror(errno));
4158 /* There is a fundamental difference in some BSD systems in the matter of
4159 groups. FreeBSD and BSDI are known to be different; NetBSD and OpenBSD are
4160 known not to be different. On the "different" systems there is a single group
4161 list, and the first entry in it is the current group. On all other versions of
4162 Unix there is a supplementary group list, which is in *addition* to the current
4163 group. Consequently, to get rid of all extraneous groups on a "standard" system
4164 you pass over 0 groups to setgroups(), while on a "different" system you pass
4165 over a single group - the current group, which is always the first group in the
4166 list. Calling setgroups() with zero groups on a "different" system results in
4167 an error return. The following code should cope with both types of system.
4169 Unfortunately, recent MacOS, which should be a FreeBSD, "helpfully" succeeds
4170 the "setgroups() with zero groups" - and changes the egid.
4171 Thanks to that we had to stash the original_egid above, for use below
4172 in the call to exim_setugid().
4174 However, if this process isn't running as root, setgroups() can't be used
4175 since you have to be root to run it, even if throwing away groups.
4176 Except, sigh, for Hurd - where you can.
4177 Not being root here happens only in some unusual configurations. */
4180 #ifndef OS_SETGROUPS_ZERO_DROPS_ALL
4181 && setgroups(0, NULL) != 0
4183 && setgroups(1, group_list) != 0)
4184 exim_fail("exim: setgroups() failed: %s\n", strerror(errno));
4186 /* If the configuration file name has been altered by an argument on the
4187 command line (either a new file name or a macro definition) and the caller is
4188 not root, or if this is a filter testing run, remove any setuid privilege the
4189 program has and run as the underlying user.
4191 The exim user is locked out of this, which severely restricts the use of -C
4194 Otherwise, set the real ids to the effective values (should be root unless run
4195 from inetd, which it can either be root or the exim uid, if one is configured).
4197 There is a private mechanism for bypassing some of this, in order to make it
4198 possible to test lots of configurations automatically, without having either to
4199 recompile each time, or to patch in an actual configuration file name and other
4200 values (such as the path name). If running in the test harness, pretend that
4201 configuration file changes and macro definitions haven't happened. */
4204 (!f.trusted_config || /* Config changed, or */
4205 !macros_trusted(opt_D_used)) && /* impermissible macros and */
4206 real_uid != root_uid && /* Not root, and */
4207 !f.running_in_test_harness /* Not fudged */
4209 expansion_test /* expansion testing */
4211 filter_test != FTEST_NONE) /* Filter testing */
4213 setgroups(group_count, group_list);
4214 exim_setugid(real_uid, real_gid, FALSE,
4215 US"-C, -D, -be or -bf forces real uid");
4216 removed_privilege = TRUE;
4218 /* In the normal case when Exim is called like this, stderr is available
4219 and should be used for any logging information because attempts to write
4220 to the log will usually fail. To arrange this, we unset really_exim. However,
4221 if no stderr is available there is no point - we might as well have a go
4222 at the log (if it fails, syslog will be written).
4224 Note that if the invoker is Exim, the logs remain available. Messing with
4225 this causes unlogged successful deliveries. */
4227 if (log_stderr && real_uid != exim_uid)
4228 f.really_exim = FALSE;
4231 /* Privilege is to be retained for the moment. It may be dropped later,
4232 depending on the job that this Exim process has been asked to do. For now, set
4233 the real uid to the effective so that subsequent re-execs of Exim are done by a
4237 exim_setugid(geteuid(), original_egid, FALSE, US"forcing real = effective");
4239 /* If testing a filter, open the file(s) now, before wasting time doing other
4240 setups and reading the message. */
4242 if (filter_test & FTEST_SYSTEM)
4243 if ((filter_sfd = Uopen(filter_test_sfile, O_RDONLY, 0)) < 0)
4244 exim_fail("exim: failed to open %s: %s\n", filter_test_sfile,
4247 if (filter_test & FTEST_USER)
4248 if ((filter_ufd = Uopen(filter_test_ufile, O_RDONLY, 0)) < 0)
4249 exim_fail("exim: failed to open %s: %s\n", filter_test_ufile,
4252 /* Initialise lookup_list
4253 If debugging, already called above via version reporting.
4254 In either case, we initialise the list of available lookups while running
4255 as root. All dynamically modules are loaded from a directory which is
4256 hard-coded into the binary and is code which, if not a module, would be
4257 part of Exim already. Ability to modify the content of the directory
4258 is equivalent to the ability to modify a setuid binary!
4260 This needs to happen before we read the main configuration. */
4262 init_misc_mod_list();
4264 /*XXX this excrescence could move to the testsuite standard config setup file */
4266 if (f.running_in_test_harness) smtputf8_advertise_hosts = NULL;
4269 /* Read the main runtime configuration data; this gives up if there
4270 is a failure. It leaves the configuration file open so that the subsequent
4271 configuration data for delivery can be read if needed.
4273 NOTE: immediately after opening the configuration file we change the working
4274 directory to "/"! Later we change to $spool_directory. We do it there, because
4275 during readconf_main() some expansion takes place already. */
4277 /* Store the initial cwd before we change directories. Can be NULL if the
4278 dir has already been unlinked. */
4279 initial_cwd = os_getcwd(NULL, 0);
4280 if (!initial_cwd && errno)
4281 exim_fail("exim: getting initial cwd failed: %s\n", strerror(errno));
4283 if (initial_cwd && (strlen(CCS initial_cwd) >= BIG_BUFFER_SIZE))
4284 exim_fail("exim: initial cwd is far too long (%d)\n", Ustrlen(CCS initial_cwd));
4287 -be[m] expansion test -
4288 -b[fF] filter test new
4290 -bmalware malware_test_file new
4292 -brw rewrite test new
4294 -bv[s] address verify -
4296 -bP <option> (except -bP config, which sets list_config)
4298 If any of these options is set, we suppress warnings about configuration
4299 issues (currently about tls_advertise_hosts and keep_environment not being
4303 int old_pool = store_pool;
4304 #ifdef MEASURE_TIMING
4306 (void)gettimeofday(&t0, NULL);
4309 store_pool = POOL_CONFIG;
4310 readconf_main(checking || list_options);
4311 store_pool = old_pool;
4313 #ifdef MEASURE_TIMING
4314 report_time_since(&t0, US"readconf_main (delta)");
4318 /* Now in directory "/" */
4320 if (cleanup_environment() == FALSE)
4321 log_write(0, LOG_PANIC_DIE, "Can't cleanup environment");
4324 /* If an action on specific messages is requested, or if a daemon or queue
4325 runner is being started, we need to know if Exim was called by an admin user.
4326 This is the case if the real user is root or exim, or if the real group is
4327 exim, or if one of the supplementary groups is exim or a group listed in
4328 admin_groups. We don't fail all message actions immediately if not admin_user,
4329 since some actions can be performed by non-admin users. Instead, set admin_user
4330 for later interrogation. */
4332 if (real_uid == root_uid || real_uid == exim_uid || real_gid == exim_gid)
4333 f.admin_user = TRUE;
4335 for (int i = 0; i < group_count && !f.admin_user; i++)
4336 if (group_list[i] == exim_gid)
4337 f.admin_user = TRUE;
4338 else if (admin_groups)
4339 for (int j = 1; j <= (int)admin_groups[0] && !f.admin_user; j++)
4340 if (admin_groups[j] == group_list[i])
4341 f.admin_user = TRUE;
4343 /* Another group of privileged users are the trusted users. These are root,
4344 exim, and any caller matching trusted_users or trusted_groups. Trusted callers
4345 are permitted to specify sender_addresses with -f on the command line, and
4346 other message parameters as well. */
4348 if (real_uid == root_uid || real_uid == exim_uid)
4349 f.trusted_caller = TRUE;
4353 for (int i = 1; i <= (int)trusted_users[0] && !f.trusted_caller; i++)
4354 if (trusted_users[i] == real_uid)
4355 f.trusted_caller = TRUE;
4358 for (int i = 1; i <= (int)trusted_groups[0] && !f.trusted_caller; i++)
4359 if (trusted_groups[i] == real_gid)
4360 f.trusted_caller = TRUE;
4361 else for (int j = 0; j < group_count && !f.trusted_caller; j++)
4362 if (trusted_groups[i] == group_list[j])
4363 f.trusted_caller = TRUE;
4366 /* At this point, we know if the user is privileged and some command-line
4367 options become possibly impermissible, depending upon the configuration file. */
4369 if (checking && commandline_checks_require_admin && !f.admin_user)
4370 exim_fail("exim: those command-line flags are set to require admin\n");
4372 /* Handle the decoding of logging options. */
4374 decode_bits(log_selector, log_selector_size, log_notall,
4375 log_selector_string, log_options, log_options_count, US"log", 0);
4379 debug_printf("configuration file is %s\n", config_main_filename);
4380 debug_printf("log selectors =");
4381 for (int i = 0; i < log_selector_size; i++)
4382 debug_printf(" %08x", log_selector[i]);
4386 /* If domain literals are not allowed, check the sender address that was
4387 supplied with -f. Ditto for a stripped trailing dot. */
4391 if (sender_address[sender_address_domain] == '[' && !allow_domain_literals)
4392 exim_fail("exim: bad -f address \"%s\": domain literals not "
4393 "allowed\n", sender_address);
4394 if (f_end_dot && !strip_trailing_dot)
4395 exim_fail("exim: bad -f address \"%s.\": domain is malformed "
4396 "(trailing dot not allowed)\n", sender_address);
4399 /* See if an admin user overrode our logging. */
4401 if (cmdline_syslog_name)
4404 syslog_processname = cmdline_syslog_name;
4405 log_file_path = string_copy(CUS"syslog");
4408 /* not a panic, non-privileged users should not be able to spam paniclog */
4410 "exim: you lack sufficient privilege to specify syslog process name\n");
4412 /* Paranoia check of maximum lengths of certain strings. There is a check
4413 on the length of the log file path in log.c, which will come into effect
4414 if there are any calls to write the log earlier than this. However, if we
4415 get this far but the string is very long, it is better to stop now than to
4416 carry on and (e.g.) receive a message and then have to collapse. The call to
4417 log_write() from here will cause the ultimate panic collapse if the complete
4418 file name exceeds the buffer length. */
4420 if (Ustrlen(log_file_path) > 200)
4421 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
4422 "log_file_path is longer than 200 chars: aborting");
4424 if (Ustrlen(pid_file_path) > 200)
4425 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
4426 "pid_file_path is longer than 200 chars: aborting");
4428 if (Ustrlen(spool_directory) > 200)
4429 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
4430 "spool_directory is longer than 200 chars: aborting");
4432 /* Length check on the process name given to syslog for its TAG field,
4433 which is only permitted to be 32 characters or less. See RFC 3164. */
4435 if (Ustrlen(syslog_processname) > 32)
4436 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
4437 "syslog_processname is longer than 32 chars: aborting");
4442 log_write(0, LOG_MAIN, "%s", log_oneline);
4443 return EXIT_SUCCESS;
4446 return EXIT_FAILURE;
4448 /* In some operating systems, the environment variable TMPDIR controls where
4449 temporary files are created; Exim doesn't use these (apart from when delivering
4450 to MBX mailboxes), but called libraries such as DBM libraries may require them.
4451 If TMPDIR is found in the environment, reset it to the value defined in the
4452 EXIM_TMPDIR macro, if this macro is defined. For backward compatibility this
4453 macro may be called TMPDIR in old "Local/Makefile"s. It's converted to
4454 EXIM_TMPDIR by the build scripts.
4458 if (environ) for (uschar ** p = USS environ; *p; p++)
4459 if (Ustrncmp(*p, "TMPDIR=", 7) == 0 && Ustrcmp(*p+7, EXIM_TMPDIR) != 0)
4461 uschar * newp = store_malloc(Ustrlen(EXIM_TMPDIR) + 8);
4462 sprintf(CS newp, "TMPDIR=%s", EXIM_TMPDIR);
4464 DEBUG(D_any) debug_printf("reset TMPDIR=%s in environment\n", EXIM_TMPDIR);
4468 /* Timezone handling. If timezone_string is "utc", set a flag to cause all
4469 timestamps to be in UTC (gmtime() is used instead of localtime()). Otherwise,
4470 we may need to get rid of a bogus timezone setting. This can arise when Exim is
4471 called by a user who has set the TZ variable. This then affects the timestamps
4472 in log files and in Received: headers, and any created Date: header lines. The
4473 required timezone is settable in the configuration file, so nothing can be done
4474 about this earlier - but hopefully nothing will normally be logged earlier than
4475 this. We have to make a new environment if TZ is wrong, but don't bother if
4476 timestamps_utc is set, because then all times are in UTC anyway. */
4478 if (timezone_string && strcmpic(timezone_string, US"UTC") == 0)
4479 f.timestamps_utc = TRUE;
4482 uschar *envtz = US getenv("TZ");
4484 ? !timezone_string || Ustrcmp(timezone_string, envtz) != 0
4485 : timezone_string != NULL
4488 uschar **p = USS environ;
4492 if (environ) while (*p++) count++;
4493 if (!envtz) count++;
4494 newp = new = store_malloc(sizeof(uschar *) * (count + 1));
4495 if (environ) for (p = USS environ; *p; p++)
4496 if (Ustrncmp(*p, "TZ=", 3) != 0) *newp++ = *p;
4497 if (timezone_string)
4499 *newp = store_malloc(Ustrlen(timezone_string) + 4);
4500 sprintf(CS *newp++, "TZ=%s", timezone_string);
4505 DEBUG(D_any) debug_printf("Reset TZ to %s: time is %s\n", timezone_string,
4506 tod_stamp(tod_log));
4510 /* Handle the case when we have removed the setuid privilege because of -C or
4511 -D. This means that the caller of Exim was not root.
4513 There is a problem if we were running as the Exim user. The sysadmin may
4514 expect this case to retain privilege because "the binary was called by the
4515 Exim user", but it hasn't, because either the -D option set macros, or the
4516 -C option set a non-trusted configuration file. There are two possibilities:
4518 (1) If deliver_drop_privilege is set, Exim is not going to re-exec in order
4519 to do message deliveries. Thus, the fact that it is running as a
4520 non-privileged user is plausible, and might be wanted in some special
4521 configurations. However, really_exim will have been set false when
4522 privilege was dropped, to stop Exim trying to write to its normal log
4523 files. Therefore, re-enable normal log processing, assuming the sysadmin
4524 has set up the log directory correctly.
4526 (2) If deliver_drop_privilege is not set, the configuration won't work as
4527 apparently intended, and so we log a panic message. In order to retain
4528 root for -C or -D, the caller must either be root or be invoking a
4529 trusted configuration file (when deliver_drop_privilege is false). */
4531 if ( removed_privilege
4532 && (!f.trusted_config || opt_D_used)
4533 && real_uid == exim_uid)
4534 if (deliver_drop_privilege)
4535 f.really_exim = TRUE; /* let logging work normally */
4537 log_write(0, LOG_MAIN|LOG_PANIC,
4538 "exim user lost privilege for using %s option",
4539 f.trusted_config? "-D" : "-C");
4541 /* Start up Perl interpreter if Perl support is configured and there is a
4542 perl_startup option, and the configuration or the command line specifies
4543 initializing starting. Note that the global variables are actually called
4544 opt_perl_xxx to avoid clashing with perl's namespace (perl_*). */
4547 if (perl_start_option != 0)
4548 opt_perl_at_start = (perl_start_option > 0);
4549 if (opt_perl_at_start && opt_perl_startup != NULL)
4552 const misc_module_info * mi = misc_mod_find(US"perl", &errstr);
4553 typedef uschar * (*fn_t)(uschar *);
4556 exim_fail("exim: error finding perl module: %s\n", errstr);
4558 DEBUG(D_any) debug_printf("Starting Perl interpreter\n");
4560 if ((errstr = (((fn_t *) mi->functions)[PERL_STARTUP]) (opt_perl_startup)))
4561 exim_fail("exim: error in perl_startup code: %s\n", errstr);
4562 opt_perl_started = TRUE;
4564 #endif /* EXIM_PERL */
4566 /* Log the arguments of the call if the configuration file said so. This is
4567 a debugging feature for finding out what arguments certain MUAs actually use.
4568 Don't attempt it if logging is disabled, or if listing variables or if
4569 verifying/testing addresses or expansions. */
4571 if ( (debug_selector & D_any || LOGGING(arguments))
4572 && f.really_exim && !list_options && !checking)
4574 uschar *p = big_buffer;
4575 Ustrcpy(p, US"cwd= (failed)");
4582 snprintf(CS p, big_buffer_size - (p - big_buffer), "%s", CCS initial_cwd);
4583 p += Ustrlen(CCS p);
4586 (void)string_format(p, big_buffer_size - (p - big_buffer), " %d args:", argc);
4588 for (int i = 0; i < argc; i++)
4590 int len = Ustrlen(argv[i]);
4591 const uschar *printing;
4593 if (p + len + 8 >= big_buffer + big_buffer_size)
4595 Ustrcpy(p, US" ...");
4596 log_write(0, LOG_MAIN, "%s", big_buffer);
4597 Ustrcpy(big_buffer, US"...");
4600 printing = string_printing(argv[i]);
4601 if (!*printing) quote = US"\"";
4604 const uschar *pp = printing;
4606 while (*pp) if (isspace(*pp++)) { quote = US"\""; break; }
4608 p += sprintf(CS p, " %s%.*s%s", quote, (int)(big_buffer_size -
4609 (p - big_buffer) - 4), printing, quote);
4612 if (LOGGING(arguments))
4613 log_write(0, LOG_MAIN, "%s", big_buffer);
4615 debug_printf("%s\n", big_buffer);
4618 /* Set the working directory to be the top-level spool directory. We don't rely
4619 on this in the code, which always uses fully qualified names, but it's useful
4620 for core dumps etc. Don't complain if it fails - the spool directory might not
4621 be generally accessible and calls with the -C option (and others) have lost
4622 privilege by now. Before the chdir, we try to ensure that the directory exists.
4625 if (Uchdir(spool_directory) != 0)
4627 (void) directory_make(spool_directory, US"", SPOOL_DIRECTORY_MODE, FALSE);
4628 (void) Uchdir(spool_directory);
4631 /* Handle calls with the -bi option. This is a sendmail option to rebuild *the*
4632 alias file. Exim doesn't have such a concept, but this call is screwed into
4633 Sun's YP makefiles. Handle this by calling a configured script, as the real
4634 user who called Exim. The -oA option can be used to pass an argument to the
4639 (void) fclose(config_file);
4640 if (bi_command && *bi_command)
4643 const uschar * argv[3];
4644 argv[i++] = bi_command; /* nonexpanded option so assume untainted */
4645 if (alias_arg) argv[i++] = alias_arg;
4648 setgroups(group_count, group_list);
4649 exim_setugid(real_uid, real_gid, FALSE, US"running bi_command");
4651 DEBUG(D_exec) debug_printf("exec '%.256s' %s%.256s%s\n", argv[0],
4652 argv[1] ? "'" : "", argv[1] ? argv[1] : US"", argv[1] ? "'" : "");
4654 execv(CS argv[0], (char *const *)argv);
4655 exim_fail("exim: exec '%s' failed: %s\n", argv[0], strerror(errno));
4659 DEBUG(D_any) debug_printf("-bi used but bi_command not set; exiting\n");
4664 /* We moved the admin/trusted check to be immediately after reading the
4665 configuration file. We leave these prints here to ensure that syslog setup,
4666 logfile setup, and so on has already happened. */
4668 if (f.trusted_caller) DEBUG(D_any) debug_printf("trusted user\n");
4669 if (f.admin_user) DEBUG(D_any) debug_printf("admin user\n");
4671 /* Only an admin user may start the daemon or force a queue run in the default
4672 configuration, but the queue run restriction can be relaxed. Only an admin
4673 user may request that a message be returned to its sender forthwith. Only an
4674 admin user may specify a debug level greater than D_v (because it might show
4675 passwords, etc. in lookup queries). Only an admin user may request a queue
4676 count. Only an admin user can use the test interface to scan for email
4677 (because Exim will be in the spool dir and able to look at mails). */
4681 BOOL debugset = (debug_selector & ~D_v) != 0;
4682 if ( deliver_give_up || f.daemon_listen || malware_test_file
4683 || count_queue && queue_list_requires_admin
4684 || list_queue && queue_list_requires_admin
4685 || qrunners && prod_requires_admin
4686 || queue_name_dest && prod_requires_admin
4687 || debugset && !f.running_in_test_harness
4689 exim_fail("exim:%s permission denied; not admin\n",
4690 debugset ? " debugging" : "");
4693 /* If the real user is not root or the exim uid, the argument for passing
4694 in an open TCP/IP connection for another message is not permitted, nor is
4695 running with the -N option for any delivery action, unless this call to exim is
4696 one that supplied an input message, or we are using a patched exim for
4697 regression testing. */
4699 if ( real_uid != root_uid && real_uid != exim_uid
4700 && ( continue_hostname
4702 && (qrunners || f.daemon_listen || msg_action_arg > 0)
4704 && !f.running_in_test_harness
4706 exim_fail("exim: Permission denied; not exim user or root\n");
4708 /* If the caller is not trusted, certain arguments are ignored when running for
4709 real, but are permitted when checking things (-be, -bv, -bt, -bh, -bf, -bF).
4710 Note that authority for performing certain actions on messages is tested in the
4711 queue_action() function. */
4713 if (!f.trusted_caller && !checking)
4715 sender_host_name = sender_host_address = interface_address =
4716 sender_ident = received_protocol = NULL;
4717 sender_host_port = interface_port = 0;
4718 sender_host_authenticated = authenticated_sender = authenticated_id = NULL;
4721 /* If a sender host address is set, extract the optional port number off the
4722 end of it and check its syntax. Do the same thing for the interface address.
4723 Exim exits if the syntax is bad. */
4727 if (sender_host_address)
4728 sender_host_port = check_port(sender_host_address);
4729 if (interface_address)
4730 interface_port = check_port(interface_address);
4733 /* If the caller is trusted, then they can use -G to suppress_local_fixups. */
4736 if (f.trusted_caller)
4738 f.suppress_local_fixups = f.suppress_local_fixups_default = TRUE;
4739 DEBUG(D_acl) debug_printf("suppress_local_fixups forced on by -G\n");
4742 exim_fail("exim: permission denied (-G requires a trusted user)\n");
4745 /* If an SMTP message is being received check to see if the standard input is a
4746 TCP/IP socket. If it is, we assume that Exim was called from inetd if the
4747 caller is root or the Exim user, or if the port is a privileged one. Otherwise,
4752 union sockaddr_46 inetd_sock;
4753 EXIM_SOCKLEN_T size = sizeof(inetd_sock);
4754 if (getpeername(0, (struct sockaddr *)(&inetd_sock), &size) == 0)
4756 int family = ((struct sockaddr *)(&inetd_sock))->sa_family;
4757 if (family == AF_INET || family == AF_INET6)
4759 union sockaddr_46 interface_sock;
4760 size = sizeof(interface_sock);
4762 if (getsockname(0, (struct sockaddr *)(&interface_sock), &size) == 0)
4763 interface_address = host_ntoa(-1, &interface_sock, NULL,
4766 if (host_is_tls_on_connect_port(interface_port)) tls_in.on_connect = TRUE;
4768 if (real_uid == root_uid || real_uid == exim_uid || interface_port < 1024)
4770 if (mua_wrapper) log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Input from "
4771 "inetd is not supported when mua_wrapper is set");
4773 sender_host_address = host_ntoa(-1, (struct sockaddr *)(&inetd_sock),
4774 NULL, &sender_host_port);
4778 "exim: Permission denied (unprivileged user, unprivileged port)\n");
4783 /* If the load average is going to be needed while receiving a message, get it
4784 now for those OS that require the first call to os_getloadavg() to be done as
4785 root. There will be further calls later for each message received. */
4787 #ifdef LOAD_AVG_NEEDS_ROOT
4788 if ( receiving_message
4789 && (queue_only_load >= 0 || f.is_inetd && smtp_load_reserve >= 0))
4790 load_average = OS_GETLOADAVG();
4793 /* The queue_only configuration option can be overridden by -odx on the command
4794 line, except that if queue_only_override is false, queue_only cannot be unset
4795 from the command line. */
4797 if (queue_only_set && (queue_only_override || arg_queue_only))
4798 queue_only = arg_queue_only;
4800 /* The receive_timeout and smtp_receive_timeout options can be overridden by
4803 if (arg_receive_timeout >= 0) receive_timeout = arg_receive_timeout;
4804 if (arg_smtp_receive_timeout >= 0)
4805 smtp_receive_timeout = arg_smtp_receive_timeout;
4807 /* If Exim was started with root privilege, unless we have already removed the
4808 root privilege above as a result of -C, -D, -be, -bf or -bF, remove it now
4809 except when starting the daemon or doing some kind of delivery or address
4810 testing (-bt). These are the only cases when root need to be retained. We run
4811 as exim for -bv and -bh. However, if deliver_drop_privilege is set, root is
4812 retained only for starting the daemon. We always do the initgroups() in this
4813 situation (controlled by the TRUE below), in order to be as close as possible
4814 to the state Exim usually runs in. */
4816 if ( !unprivileged /* originally had root AND */
4817 && !removed_privilege /* still got root AND */
4818 && !f.daemon_listen /* not starting the daemon */
4819 && (!qrunners || is_onetime_qrun()) /* (either kind of daemon) */
4820 && ( /* AND EITHER */
4821 deliver_drop_privilege /* requested unprivileged */
4823 !qrunners /* not running the queue */
4824 && ( msg_action_arg < 0 /* and */
4825 || msg_action != MSG_DELIVER /* not delivering */
4827 && (!checking || !f.address_test_mode) /* not address checking */
4828 && !rcpt_verify_quota /* and not quota checking */
4830 exim_setugid(exim_uid, exim_gid, TRUE, US"privilege not needed");
4832 /* When we are retaining a privileged uid, we still change to the exim gid. */
4837 DEBUG(D_any) debug_printf("dropping to exim gid; retaining priv uid\n");
4838 rv = setgid(exim_gid);
4839 /* Impact of failure is that some stuff might end up with an incorrect group.
4840 We track this for failures from root, since any attempt to change privilege
4841 by root should succeed and failures should be examined. For non-root,
4842 there's no security risk. For me, it's { exim -bV } on a just-built binary,
4843 no need to complain then. */
4845 if (!(unprivileged || removed_privilege))
4846 exim_fail("exim: changing group failed: %s\n", strerror(errno));
4849 DEBUG(D_any) debug_printf("changing group to %ld failed: %s\n",
4850 (long int)exim_gid, strerror(errno));
4854 /* Handle a request to scan a file for malware */
4855 if (malware_test_file)
4857 #ifdef WITH_CONTENT_SCAN
4859 set_process_info("scanning file for malware");
4860 if ((result = malware_in_file(malware_test_file)) == FAIL)
4862 printf("No malware found.\n");
4863 exim_exit(EXIT_SUCCESS);
4867 printf("Malware lookup returned non-okay/fail: %d\n", result);
4868 exim_exit(EXIT_FAILURE);
4871 printf("Malware found: %s\n", malware_name);
4873 printf("Malware scan detected malware of unknown name.\n");
4875 printf("Malware scanning not enabled at compile time.\n");
4877 exim_exit(EXIT_FAILURE);
4880 /* Handle a request to list the delivery queue */
4884 set_process_info("listing the queue");
4885 queue_list(list_queue_option, argv + recipients_arg, argc - recipients_arg);
4886 exim_exit(EXIT_SUCCESS);
4889 /* Handle a request to count the delivery queue */
4893 set_process_info("counting the queue");
4894 fprintf(stdout, "%u\n", queue_count());
4895 exim_exit(EXIT_SUCCESS);
4898 /* Handle actions on specific messages, except for the force delivery and
4899 message load actions, which are done below. Some actions take a whole list of
4900 message ids, which are known to continue up to the end of the arguments. Others
4901 take a single message id and then operate on the recipients list. */
4903 if (msg_action_arg > 0 && msg_action != MSG_DELIVER && msg_action != MSG_LOAD)
4905 int yield = EXIT_SUCCESS;
4906 set_process_info("acting on specified messages");
4908 /* ACL definitions may be needed when removing a message (-Mrm) because
4909 event_action gets expanded */
4911 if (msg_action == MSG_REMOVE)
4913 int old_pool = store_pool;
4914 store_pool = POOL_CONFIG;
4916 store_pool = old_pool;
4917 store_writeprotect(POOL_CONFIG);
4920 if (!one_msg_action)
4922 for (i = msg_action_arg; i < argc; i++)
4923 if (!queue_action(argv[i], msg_action, NULL, 0, 0))
4924 yield = EXIT_FAILURE;
4927 case MSG_REMOVE: case MSG_FREEZE: case MSG_THAW: break;
4928 default: printf("\n"); break;
4932 else if (!queue_action(argv[msg_action_arg], msg_action, argv, argc,
4933 recipients_arg)) yield = EXIT_FAILURE;
4937 /* We used to set up here to skip reading the ACL section, on
4938 (msg_action_arg > 0 || (is_onetime_qrun() && !f.daemon_listen)
4939 Now, since the intro of the ${acl } expansion, ACL definitions may be
4940 needed in transports so we lost the optimisation. */
4943 int old_pool = store_pool;
4944 #ifdef MEASURE_TIMING
4946 (void)gettimeofday(&t0, NULL);
4949 store_pool = POOL_CONFIG;
4951 store_pool = old_pool;
4953 /* -be can add macro definitions, needing to link to the macro structure
4954 chain. Otherwise, make the memory used for config data readonly. */
4956 if (!expansion_test)
4957 store_writeprotect(POOL_CONFIG);
4959 #ifdef MEASURE_TIMING
4960 report_time_since(&t0, US"readconf_rest (delta)");
4964 /* Handle a request to check quota */
4965 if (rcpt_verify_quota)
4966 if (real_uid != root_uid && real_uid != exim_uid)
4967 exim_fail("exim: Permission denied\n");
4968 else if (recipients_arg >= argc)
4969 exim_fail("exim: missing recipient for quota check\n");
4972 verify_quota(US argv[recipients_arg]); /*XXX we lose track of const here */
4973 exim_exit(EXIT_SUCCESS);
4976 /* Handle the -brt option. This is for checking out retry configurations.
4977 The next three arguments are a domain name or a complete address, and
4978 optionally two error numbers. All it does is to call the function that
4979 scans the retry configuration data. */
4981 if (test_retry_arg >= 0)
4983 retry_config *yield;
4984 int basic_errno = 0;
4986 const uschar *s1, *s2;
4988 if (test_retry_arg >= argc)
4990 printf("-brt needs a domain or address argument\n");
4991 exim_exit(EXIT_FAILURE);
4993 s1 = exim_str_fail_toolong(argv[test_retry_arg++], EXIM_EMAILADDR_MAX, "-brt");
4996 /* If the first argument contains no @ and no . it might be a local user
4997 or it might be a single-component name. Treat as a domain. */
4999 if (Ustrchr(s1, '@') == NULL && Ustrchr(s1, '.') == NULL)
5001 printf("Warning: \"%s\" contains no '@' and no '.' characters. It is "
5002 "being \ntreated as a one-component domain, not as a local part.\n\n",
5006 /* There may be an optional second domain arg. */
5008 if (test_retry_arg < argc && Ustrchr(argv[test_retry_arg], '.') != NULL)
5009 s2 = exim_str_fail_toolong(argv[test_retry_arg++], EXIM_DOMAINNAME_MAX, "-brt 2nd");
5011 /* The final arg is an error name */
5013 if (test_retry_arg < argc)
5015 const uschar *ss = exim_str_fail_toolong(argv[test_retry_arg], EXIM_DRIVERNAME_MAX, "-brt 3rd");
5017 readconf_retry_error(ss, ss + Ustrlen(ss), &basic_errno, &more_errno);
5020 printf("%s\n", CS error);
5021 return EXIT_FAILURE;
5024 /* For the {MAIL,RCPT,DATA}_4xx errors, a value of 255 means "any", and a
5025 code > 100 as an error is for matching codes to the decade. Turn them into
5026 a real error code, off the decade. */
5028 if (basic_errno == ERRNO_MAIL4XX ||
5029 basic_errno == ERRNO_RCPT4XX ||
5030 basic_errno == ERRNO_DATA4XX)
5032 int code = (more_errno >> 8) & 255;
5034 more_errno = (more_errno & 0xffff00ff) | (21 << 8);
5035 else if (code > 100)
5036 more_errno = (more_errno & 0xffff00ff) | ((code - 96) << 8);
5040 if (!(yield = retry_find_config(s1, s2, basic_errno, more_errno)))
5041 printf("No retry information found\n");
5044 more_errno = yield->more_errno;
5045 printf("Retry rule: %s ", yield->pattern);
5047 if (yield->basic_errno == ERRNO_EXIMQUOTA)
5049 printf("quota%s%s ",
5050 (more_errno > 0)? "_" : "",
5051 (more_errno > 0)? readconf_printtime(more_errno) : US"");
5053 else if (yield->basic_errno == ECONNREFUSED)
5055 printf("refused%s%s ",
5056 (more_errno > 0)? "_" : "",
5057 (more_errno == 'M')? "MX" :
5058 (more_errno == 'A')? "A" : "");
5060 else if (yield->basic_errno == ETIMEDOUT)
5063 if ((more_errno & RTEF_CTOUT) != 0) printf("_connect");
5065 if (more_errno != 0) printf("_%s",
5066 (more_errno == 'M')? "MX" : "A");
5069 else if (yield->basic_errno == ERRNO_AUTHFAIL)
5070 printf("auth_failed ");
5073 for (retry_rule * r = yield->rules; r; r = r->next)
5075 printf("%c,%s", r->rule, readconf_printtime(r->timeout)); /* Do not */
5076 printf(",%s", readconf_printtime(r->p1)); /* amalgamate */
5082 printf(",%d.", x/1000);
5096 exim_exit(EXIT_SUCCESS);
5099 /* Handle a request to list one or more configuration options */
5100 /* If -n was set, we suppress some information */
5105 set_process_info("listing variables");
5106 if (recipients_arg >= argc)
5107 fail = !readconf_print(US"all", NULL, flag_n);
5108 else for (i = recipients_arg; i < argc; i++)
5111 (Ustrcmp(argv[i], "router") == 0 ||
5112 Ustrcmp(argv[i], "transport") == 0 ||
5113 Ustrcmp(argv[i], "authenticator") == 0 ||
5114 Ustrcmp(argv[i], "macro") == 0 ||
5115 Ustrcmp(argv[i], "environment") == 0))
5117 fail |= !readconf_print(exim_str_fail_toolong(argv[i+1], EXIM_DRIVERNAME_MAX, "-bP name"), argv[i], flag_n);
5121 fail = !readconf_print(exim_str_fail_toolong(argv[i], EXIM_DRIVERNAME_MAX, "-bP item"), NULL, flag_n);
5123 exim_exit(fail ? EXIT_FAILURE : EXIT_SUCCESS);
5128 set_process_info("listing config");
5129 exim_exit(readconf_print(US"config", NULL, flag_n)
5130 ? EXIT_SUCCESS : EXIT_FAILURE);
5134 /* Initialise subsystems as required. */
5138 /* Handle a request to deliver one or more messages that are already on the
5139 queue. Values of msg_action other than MSG_DELIVER and MSG_LOAD are dealt with
5140 above. MSG_LOAD is handled with -be (which is the only time it applies) below.
5142 Delivery of specific messages is typically used for a small number when
5143 prodding by hand (when the option forced_delivery will be set) or when
5144 re-execing to regain root privilege. Each message delivery must happen in a
5145 separate process, so we fork a process for each one, and run them sequentially
5146 so that debugging output doesn't get intertwined, and to avoid spawning too
5147 many processes if a long list is given. However, don't fork for the last one;
5148 this saves a process in the common case when Exim is called to deliver just one
5151 if (msg_action_arg > 0 && msg_action != MSG_LOAD)
5153 if (prod_requires_admin && !f.admin_user)
5155 fprintf(stderr, "exim: Permission denied\n");
5156 exim_exit(EXIT_FAILURE);
5158 set_process_info("delivering specified messages");
5159 if (deliver_give_up) forced_delivery = f.deliver_force_thaw = TRUE;
5160 for (i = msg_action_arg; i < argc; i++)
5164 /*XXX This use of argv[i] for msg_id should really be tainted, but doing
5165 that runs into a later copy into the untainted global message_id[] */
5166 /*XXX Do we need a length limit check here? */
5168 (void)deliver_message(argv[i], forced_delivery, deliver_give_up);
5169 else if ((pid = exim_fork(US"cmdline-delivery")) == 0)
5171 (void)deliver_message(argv[i], forced_delivery, deliver_give_up);
5172 exim_underbar_exit(EXIT_SUCCESS);
5176 fprintf(stderr, "failed to fork delivery process for %s: %s\n", argv[i],
5178 exim_exit(EXIT_FAILURE);
5182 exim_exit(EXIT_SUCCESS);
5186 /* If only a single queue run is requested, without SMTP listening, we can just
5187 turn into a queue runner, with an optional starting message id. */
5189 if (is_onetime_qrun() && !f.daemon_listen)
5191 single_queue_run(qrunners, start_queue_run_id, stop_queue_run_id);
5192 exim_exit(EXIT_SUCCESS);
5196 /* Find the login name of the real user running this process. This is always
5197 needed when receiving a message, because it is written into the spool file. It
5198 may also be used to construct a from: or a sender: header, and in this case we
5199 need the user's full name as well, so save a copy of it, checked for RFC822
5200 syntax and munged if necessary, if it hasn't previously been set by the -F
5201 argument. We may try to get the passwd entry more than once, in case NIS or
5202 other delays are in evidence. Save the home directory for use in filter testing
5207 if ((pw = getpwuid(real_uid)) != NULL)
5209 originator_login = string_copy(US pw->pw_name);
5210 originator_home = string_copy(US pw->pw_dir);
5212 /* If user name has not been set by -F, set it from the passwd entry
5213 unless -f has been used to set the sender address by a trusted user. */
5215 if (!originator_name)
5217 if (!sender_address || (!f.trusted_caller && filter_test == FTEST_NONE))
5219 uschar *name = US pw->pw_gecos;
5220 uschar *amp = Ustrchr(name, '&');
5223 /* Most Unix specify that a '&' character in the gecos field is
5224 replaced by a copy of the login name, and some even specify that
5225 the first character should be upper cased, so that's what we do. */
5230 string_format(buffer, sizeof(buffer), "%.*s%n%s%s",
5231 (int)(amp - name), name, &loffset, originator_login, amp + 1);
5232 buffer[loffset] = toupper(buffer[loffset]);
5236 /* If a pattern for matching the gecos field was supplied, apply
5237 it and then expand the name string. */
5239 GET_OPTION("gecos_pattern");
5240 GET_OPTION("gecos_name");
5241 if (gecos_pattern && gecos_name)
5243 const pcre2_code *re;
5244 re = regex_must_compile(gecos_pattern, MCS_NOFLAGS, TRUE); /* Use malloc */
5246 if (regex_match_and_setup(re, name, 0, -1))
5248 uschar *new_name = expand_string(gecos_name);
5252 DEBUG(D_receive) debug_printf("user name \"%s\" extracted from "
5253 "gecos field \"%s\"\n", new_name, name);
5256 else DEBUG(D_receive) debug_printf("failed to expand gecos_name string "
5257 "\"%s\": %s\n", gecos_name, expand_string_message);
5259 else DEBUG(D_receive) debug_printf("gecos_pattern \"%s\" did not match "
5260 "gecos field \"%s\"\n", gecos_pattern, name);
5261 store_free((void *)re);
5263 originator_name = string_copy(name);
5266 /* A trusted caller has used -f but not -F */
5268 else originator_name = US"";
5271 /* Break the retry loop */
5276 if (++i > finduser_retries) break;
5280 /* If we cannot get a user login, log the incident and give up, unless the
5281 configuration specifies something to use. When running in the test harness,
5282 any setting of unknown_login overrides the actual name. */
5284 if (!originator_login || f.running_in_test_harness)
5286 GET_OPTION("unknown_login");
5289 originator_login = expand_string(unknown_login);
5290 if (!originator_name && unknown_username)
5291 originator_name = expand_string(unknown_username);
5292 if (!originator_name) originator_name = US"";
5294 if (!originator_login)
5295 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Failed to get user name for uid %d",
5299 /* Ensure that the user name is in a suitable form for use as a "phrase" in an
5302 originator_name = US parse_fix_phrase(originator_name, Ustrlen(originator_name));
5304 /* If a message is created by this call of Exim, the uid/gid of its originator
5305 are those of the caller. These values are overridden if an existing message is
5306 read in from the spool. */
5308 originator_uid = real_uid;
5309 originator_gid = real_gid;
5311 DEBUG(D_receive) debug_printf("originator: uid=%d gid=%d login=%s name=%s\n",
5312 (int)originator_uid, (int)originator_gid, originator_login, originator_name);
5314 /* Run in daemon and/or queue-running mode. The function daemon_go() never
5315 returns. We leave this till here so that the originator_ fields are available
5316 for incoming messages via the daemon. The daemon cannot be run in mua_wrapper
5319 if (f.daemon_listen || f.inetd_wait_mode || is_multiple_qrun())
5323 fprintf(stderr, "Daemon cannot be run when mua_wrapper is set\n");
5324 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Daemon cannot be run when "
5325 "mua_wrapper is set");
5328 # ifndef DISABLE_TLS
5329 /* This also checks that the library linkage is working and we can call
5330 routines in it, so call even if tls_require_ciphers is unset */
5332 # ifdef MEASURE_TIMING
5334 (void)gettimeofday(&t0, NULL);
5336 if (!tls_dropprivs_validate_require_cipher(FALSE))
5337 exim_exit(EXIT_FAILURE);
5338 # ifdef MEASURE_TIMING
5339 report_time_since(&t0, US"validate_ciphers (delta)");
5348 /* If the sender ident has not been set (by a trusted caller) set it to
5349 the caller. This will get overwritten below for an inetd call. If a trusted
5350 caller has set it empty, unset it. */
5352 if (!sender_ident) sender_ident = originator_login;
5353 else if (!*sender_ident) sender_ident = NULL;
5355 /* Handle the -brw option, which is for checking out rewriting rules. Cause log
5356 writes (on errors) to go to stderr instead. Can't do this earlier, as want the
5357 originator_* variables set. */
5359 if (test_rewrite_arg >= 0)
5361 f.really_exim = FALSE;
5362 if (test_rewrite_arg >= argc)
5364 printf("-brw needs an address argument\n");
5365 exim_exit(EXIT_FAILURE);
5367 rewrite_test(exim_str_fail_toolong(argv[test_rewrite_arg], EXIM_EMAILADDR_MAX, "-brw"));
5368 exim_exit(EXIT_SUCCESS);
5371 /* A locally-supplied message is considered to be coming from a local user
5372 unless a trusted caller supplies a sender address with -f, or is passing in the
5373 message via SMTP (inetd invocation or otherwise). */
5375 if ( !sender_address && !smtp_input
5376 || !f.trusted_caller && filter_test == FTEST_NONE)
5378 f.sender_local = TRUE;
5380 /* A trusted caller can supply authenticated_sender and authenticated_id
5381 via -oMas and -oMai and if so, they will already be set. Otherwise, force
5382 defaults except when host checking. */
5384 if (!authenticated_sender && !host_checking)
5385 authenticated_sender = string_sprintf("%s@%s", originator_login,
5386 qualify_domain_sender);
5387 if (!authenticated_id && !host_checking)
5388 authenticated_id = originator_login;
5391 /* Trusted callers are always permitted to specify the sender address.
5392 Untrusted callers may specify it if it matches untrusted_set_sender, or if what
5393 is specified is the empty address. However, if a trusted caller does not
5394 specify a sender address for SMTP input, we leave sender_address unset. This
5395 causes the MAIL commands to be honoured. */
5397 if ( !smtp_input && !sender_address
5398 || !receive_check_set_sender(sender_address))
5400 /* Either the caller is not permitted to set a general sender, or this is
5401 non-SMTP input and the trusted caller has not set a sender. If there is no
5402 sender, or if a sender other than <> is set, override with the originator's
5403 login (which will get qualified below), except when checking things. */
5405 if ( !sender_address /* No sender_address set */
5407 (sender_address[0] != 0 && /* Non-empty sender address, AND */
5408 !checking)) /* Not running tests, including filter tests */
5410 sender_address = originator_login;
5411 f.sender_address_forced = FALSE;
5412 sender_address_domain = 0;
5416 /* Remember whether an untrusted caller set the sender address */
5418 f.sender_set_untrusted = sender_address != originator_login && !f.trusted_caller;
5420 /* Ensure that the sender address is fully qualified unless it is the empty
5421 address, which indicates an error message, or doesn't exist (root caller, smtp
5422 interface, no -f argument). */
5424 if (sender_address && *sender_address && sender_address_domain == 0)
5425 sender_address = string_sprintf("%s@%s", local_part_quote(sender_address),
5426 qualify_domain_sender);
5428 DEBUG(D_receive) debug_printf("sender address = %s\n", sender_address);
5430 /* Handle a request to verify a list of addresses, or test them for delivery.
5431 This must follow the setting of the sender address, since routers can be
5432 predicated upon the sender. If no arguments are given, read addresses from
5433 stdin. Set debug_level to at least D_v to get full output for address testing.
5436 if (verify_address_mode || f.address_test_mode)
5439 int flags = vopt_qualify;
5441 if (verify_address_mode)
5443 if (!verify_as_sender) flags |= vopt_is_recipient;
5444 DEBUG(D_verify) debug_print_ids(US"Verifying:");
5449 flags |= vopt_is_recipient;
5450 debug_selector |= D_v;
5451 debug_file = stderr;
5452 debug_fd = fileno(debug_file);
5453 DEBUG(D_verify) debug_print_ids(US"Address testing:");
5456 if (recipients_arg < argc)
5457 while (recipients_arg < argc)
5459 /* Supplied addresses are tainted since they come from a user */
5460 uschar * s = string_copy_taint(
5461 exim_str_fail_toolong(argv[recipients_arg++], EXIM_DISPLAYMAIL_MAX, "address verification"),
5465 BOOL finished = FALSE;
5466 uschar *ss = parse_find_address_end(s, FALSE);
5467 if (*ss == ',') *ss = 0; else finished = TRUE;
5468 test_address(s, flags, &exit_value);
5471 while (*++s == ',' || isspace(*s)) ;
5477 uschar * s = get_stdinput(NULL, NULL);
5479 test_address(string_copy_taint(
5480 exim_str_fail_toolong(s, EXIM_DISPLAYMAIL_MAX, "address verification (stdin)"),
5482 flags, &exit_value);
5486 exim_exit(exit_value);
5489 /* Handle expansion checking. Either expand items on the command line, or read
5490 from stdin if there aren't any. If -Mset was specified, load the message so
5491 that its variables can be used, but restrict this facility to admin users.
5492 Otherwise, if -bem was used, read a message from stdin. */
5496 dns_init(FALSE, FALSE, FALSE);
5497 if (msg_action_arg > 0 && msg_action == MSG_LOAD)
5501 exim_fail("exim: permission denied\n");
5502 message_id = US exim_str_fail_toolong(argv[msg_action_arg], MESSAGE_ID_LENGTH, "message-id");
5503 /* Checking the length of the ID is sufficient to validate it.
5504 Get an untainted version so file opens can be done. */
5505 message_id = string_copy_taint(message_id, GET_UNTAINTED);
5507 spoolname = string_sprintf("%s-H", message_id);
5508 if ((deliver_datafile = spool_open_datafile(message_id)) < 0)
5509 printf ("Failed to load message datafile %s\n", message_id);
5510 if (spool_read_header(spoolname, TRUE, FALSE) != spool_read_OK)
5511 printf ("Failed to load message %s\n", message_id);
5514 /* Read a test message from a file. We fudge it up to be on stdin, saving
5515 stdin itself for later reading of expansion strings. */
5517 else if (expansion_test_message)
5519 uschar * rme = expand_string(recipients_max);
5520 int save_stdin = dup(0);
5521 int fd = Uopen(expansion_test_message, O_RDONLY, 0);
5523 exim_fail("exim: failed to open %s: %s\n", expansion_test_message,
5526 filter_test = FTEST_USER; /* Fudge to make it look like filter test */
5527 message_ended = END_NOTENDED;
5528 recipients_max_expanded = atoi(CCS rme);
5529 read_message_body(receive_msg(extract_recipients));
5530 message_linecount += body_linecount;
5531 (void)dup2(save_stdin, 0);
5532 (void)close(save_stdin);
5533 clearerr(stdin); /* Required by Darwin */
5536 /* Only admin users may see config-file macros this way */
5538 if (!f.admin_user) macros_user = macros = mlast = NULL;
5540 /* Allow $recipients for this testing */
5542 f.enable_dollar_recipients = TRUE;
5544 /* Expand command line items */
5546 if (recipients_arg < argc)
5548 config_filename = US"-be args";
5549 for (config_lineno = 1; recipients_arg < argc; config_lineno++)
5550 expansion_test_line(exim_str_fail_toolong(argv[recipients_arg++],
5551 EXIM_EMAILADDR_MAX, "-be arg"));
5558 char *(*fn_readline)(const char *) = NULL;
5559 void (*fn_addhist)(const char *) = NULL;
5563 void *dlhandle = set_readline(&fn_readline, &fn_addhist);
5566 config_filename = US"-be stdin";
5567 for (config_lineno = 1; s = get_stdinput(fn_readline, fn_addhist);
5569 expansion_test_line(s);
5572 if (dlhandle) dlclose(dlhandle);
5576 /* The data file will be open after -Mset */
5578 if (deliver_datafile >= 0)
5580 (void)close(deliver_datafile);
5581 deliver_datafile = -1;
5584 exim_exit(EXIT_SUCCESS);
5588 /* The active host name is normally the primary host name, but it can be varied
5589 for hosts that want to play several parts at once. We need to ensure that it is
5590 set for host checking, and for receiving messages. */
5592 smtp_active_hostname = primary_hostname;
5593 GET_OPTION("smtp_active_hostname");
5594 if (raw_active_hostname)
5596 uschar * nah = expand_string(raw_active_hostname);
5599 if (!f.expand_string_forcedfail)
5600 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to expand \"%s\" "
5601 "(smtp_active_hostname): %s", raw_active_hostname,
5602 expand_string_message);
5604 else if (nah[0]) smtp_active_hostname = nah;
5607 /* Handle host checking: this facility mocks up an incoming SMTP call from a
5608 given IP address so that the blocking and relay configuration can be tested.
5609 Unless a sender_ident was set by -oMt, we discard it (the default is the
5610 caller's login name). An RFC 1413 call is made only if we are running in the
5611 test harness and an incoming interface and both ports are specified, because
5612 there is no TCP/IP call to find the ident for. */
5619 if (!sender_ident_set)
5621 sender_ident = NULL;
5622 if (f.running_in_test_harness && sender_host_port
5623 && interface_address && interface_port)
5624 verify_get_ident(1223); /* note hardwired port number */
5627 /* In case the given address is a non-canonical IPv6 address, canonicalize
5628 it. Use the compressed form for IPv6. */
5630 size = host_aton(sender_host_address, x);
5631 sender_host_address = store_get(48, GET_UNTAINTED); /* large enough for full IPv6 */
5633 (void) host_nmtoa(size, x, -1, sender_host_address, ':');
5635 (void) ipv6_nmtoa(x, sender_host_address);
5637 /* Now set up for testing */
5639 host_build_sender_fullhost();
5643 f.sender_local = FALSE;
5644 f.sender_host_notsocket = TRUE;
5645 debug_file = stderr;
5646 debug_fd = fileno(debug_file);
5647 fprintf(stdout, "\n**** SMTP testing session as if from host %s\n"
5648 "**** but without any ident (RFC 1413) callback.\n"
5649 "**** This is not for real!\n\n",
5650 sender_host_address);
5652 set_connection_id();
5653 memset(sender_host_cache, 0, sizeof(sender_host_cache));
5654 if (verify_check_host(&hosts_connection_nolog) == OK)
5656 BIT_CLEAR(log_selector, log_selector_size, Li_smtp_connection);
5657 BIT_CLEAR(log_selector, log_selector_size, Li_smtp_no_mail);
5659 log_write(L_smtp_connection, LOG_MAIN, "%s", smtp_get_connection_info());
5661 /* NOTE: We do *not* call smtp_log_no_mail() if smtp_start_session() fails,
5662 because a log line has already been written for all its failure exists
5663 (usually "connection refused: <reason>") and writing another one is
5664 unnecessary clutter. */
5666 if (smtp_start_session())
5669 for (; (reset_point = store_mark()); store_reset(reset_point))
5671 if (smtp_setup_msg() <= 0) break;
5672 if (!receive_msg(FALSE)) break;
5674 return_path = sender_address = NULL;
5675 dnslist_domain = dnslist_matched = NULL;
5677 deliver_localpart_orig = NULL;
5678 deliver_domain_orig = NULL;
5679 callout_address = sending_ip_address = NULL;
5680 deliver_localpart_data = deliver_domain_data =
5681 recipient_data = sender_data = NULL;
5682 sender_rate = sender_rate_limit = sender_rate_period = NULL;
5686 exim_exit(EXIT_SUCCESS);
5690 /* Arrange for message reception if recipients or SMTP were specified;
5691 otherwise complain unless a version print (-bV) happened or this is a filter
5692 verification test or info dump.
5693 In the former case, show the configuration file name. */
5695 if ( recipients_arg >= argc && !extract_recipients
5696 && !smtp_input && !atrn_mode)
5698 if (version_printed)
5700 if (Ustrchr(config_main_filelist, ':'))
5701 printf("Configuration file search path is %s\n", config_main_filelist);
5702 printf("Configuration file is %s\n", config_main_filename);
5703 return EXIT_SUCCESS;
5706 if (info_flag != CMDINFO_NONE)
5708 show_exim_information(info_flag, info_stdout ? stdout : stderr);
5709 return info_stdout ? EXIT_SUCCESS : EXIT_FAILURE;
5712 if (filter_test == FTEST_NONE)
5713 exim_usage(called_as);
5716 /*XXX somewhere around here. Maybe earlier, but no later. ATRN customer */
5718 atrn_handle_customer();
5721 /* If mua_wrapper is set, Exim is being used to turn an MUA that submits on the
5722 standard input into an MUA that submits to a smarthost over TCP/IP. We know
5723 that we are not called from inetd, because that is rejected above. The
5724 following configuration settings are forced here:
5726 (1) Synchronous delivery (-odi)
5727 (2) Errors to stderr (-oep == -oeq)
5728 (3) No parallel remote delivery
5729 (4) Unprivileged delivery
5731 We don't force overall queueing options because there are several of them;
5732 instead, queueing is avoided below when mua_wrapper is set. However, we do need
5733 to override any SMTP queueing. */
5737 f.synchronous_delivery = TRUE;
5738 arg_error_handling = ERRORS_STDERR;
5739 remote_max_parallel = 1;
5740 deliver_drop_privilege = TRUE;
5741 f.queue_smtp = FALSE;
5742 queue_smtp_domains = NULL;
5744 message_utf8_downconvert = -1; /* convert-if-needed */
5749 /* Prepare to accept one or more new messages on the standard input. When a
5750 message has been read, its id is returned in message_id[]. If doing immediate
5751 delivery, we fork a delivery process for each received message, except for the
5752 last one, where we can save a process switch.
5754 It is only in non-smtp mode that error_handling is allowed to be changed from
5755 its default of ERRORS_SENDER by argument. (Idle thought: are any of the
5756 sendmail error modes other than -oem ever actually used? Later: yes.) */
5758 if (!smtp_input) error_handling = arg_error_handling;
5760 /* If this is an inetd call, ensure that stderr is closed to prevent panic
5761 logging being sent down the socket and make an identd call to get the
5764 else if (f.is_inetd && !atrn_mode)
5766 (void)fclose(stderr);
5767 exim_nullstd(); /* Re-open to /dev/null */
5768 verify_get_ident(IDENT_PORT);
5769 host_build_sender_fullhost();
5770 set_process_info("handling incoming connection from %s via inetd",
5774 /* If the sender host address has been set, build sender_fullhost if it hasn't
5775 already been done (which it will have been for inetd). This caters for the
5776 case when it is forced by -oMa. However, we must flag that it isn't a socket,
5777 so that the test for IP options is skipped for -bs input. */
5779 if (sender_host_address && !sender_fullhost)
5781 host_build_sender_fullhost();
5782 set_process_info("handling incoming connection from %s via -oMa",
5784 f.sender_host_notsocket = TRUE;
5787 /* Otherwise, set the sender host as unknown except for inetd calls. This
5788 prevents host checking in the case of -bs not from inetd and also for -bS. */
5790 else if (!f.is_inetd) f.sender_host_unknown = TRUE;
5792 /* If stdout does not exist, then dup stdin to stdout. This can happen
5793 if exim is started from inetd. In this case fd 0 will be set to the socket,
5794 but fd 1 will not be set. This also happens for passed SMTP channels. */
5796 if (fstat(1, &statbuf) < 0) (void)dup2(0, 1);
5798 /* Set up the incoming protocol name and the state of the program. Root is
5799 allowed to force received protocol via the -oMr option above. If we have come
5800 via inetd, the process info has already been set up. We don't set
5801 received_protocol here for smtp input, as it varies according to
5802 batch/HELO/EHLO/AUTH/TLS. */
5806 if (!f.is_inetd) set_process_info("accepting a local %sSMTP message from <%s>",
5807 smtp_batched_input? "batched " : "",
5808 sender_address ? sender_address : originator_login);
5812 int old_pool = store_pool;
5813 store_pool = POOL_PERM;
5814 if (!received_protocol)
5815 received_protocol = string_sprintf("local%s", called_as);
5816 store_pool = old_pool;
5817 set_process_info("accepting a local non-SMTP message from <%s>",
5821 /* Initialize the session_local_queue-only flag (this will be ignored if
5822 mua_wrapper is set) */
5825 session_local_queue_only = queue_only;
5827 /* For non-SMTP and for batched SMTP input, check that there is enough space on
5828 the spool if so configured. On failure, we must not attempt to send an error
5829 message! (For interactive SMTP, the check happens at MAIL FROM and an SMTP
5830 error code is given.) */
5832 if ((!smtp_input || smtp_batched_input) && !receive_check_fs(0))
5833 exim_fail("exim: insufficient disk space\n");
5835 /* If this is smtp input of any kind, real or batched, handle the start of the
5838 NOTE: We do *not* call smtp_log_no_mail() if smtp_start_session() fails,
5839 because a log line has already been written for all its failure exists
5840 (usually "connection refused: <reason>") and writing another one is
5841 unnecessary clutter. */
5843 set_connection_id();
5849 memset(sender_host_cache, 0, sizeof(sender_host_cache));
5850 if (verify_check_host(&hosts_connection_nolog) == OK)
5852 BIT_CLEAR(log_selector, log_selector_size, Li_smtp_connection);
5853 BIT_CLEAR(log_selector, log_selector_size, Li_smtp_no_mail);
5855 log_write(L_smtp_connection, LOG_MAIN, "%s", smtp_get_connection_info());
5856 if (!smtp_start_session())
5859 exim_exit(EXIT_SUCCESS);
5863 /* Otherwise, set up the input size limit here and set no stdin stdio buffer
5864 (we handle buferring so as to have visibility of fill level). */
5868 GET_OPTION("message_size_limit");
5869 thismessage_size_limit = expand_string_integer(message_size_limit, TRUE);
5870 if (expand_string_message)
5871 if (thismessage_size_limit == -1)
5872 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to expand "
5873 "message_size_limit: %s", expand_string_message);
5875 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "invalid value for "
5876 "message_size_limit: %s", expand_string_message);
5878 setvbuf(stdin, NULL, _IONBF, 0);
5881 /* Loop for several messages when reading SMTP input. If we fork any child
5882 processes, we don't want to wait for them unless synchronous delivery is
5883 requested, so set SIGCHLD to SIG_IGN in that case. This is not necessarily the
5884 same as SIG_DFL, despite the fact that documentation often lists the default as
5885 "ignore". This is a confusing area. This is what I know:
5887 At least on some systems (e.g. Solaris), just setting SIG_IGN causes child
5888 processes that complete simply to go away without ever becoming defunct. You
5889 can't then wait for them - but we don't want to wait for them in the
5890 non-synchronous delivery case. However, this behaviour of SIG_IGN doesn't
5891 happen for all OS (e.g. *BSD is different).
5893 But that's not the end of the story. Some (many? all?) systems have the
5894 SA_NOCLDWAIT option for sigaction(). This requests the behaviour that Solaris
5895 has by default, so it seems that the difference is merely one of default
5896 (compare restarting vs non-restarting signals).
5898 To cover all cases, Exim sets SIG_IGN with SA_NOCLDWAIT here if it can. If not,
5899 it just sets SIG_IGN. To be on the safe side it also calls waitpid() at the end
5900 of the loop below. Paranoia rules.
5902 February 2003: That's *still* not the end of the story. There are now versions
5903 of Linux (where SIG_IGN does work) that are picky. If, having set SIG_IGN, a
5904 process then calls waitpid(), a grumble is written to the system log, because
5905 this is logically inconsistent. In other words, it doesn't like the paranoia.
5906 As a consequence of this, the waitpid() below is now excluded if we are sure
5907 that SIG_IGN works. */
5909 if (!f.synchronous_delivery)
5912 struct sigaction act;
5913 act.sa_handler = SIG_IGN;
5914 sigemptyset(&(act.sa_mask));
5915 act.sa_flags = SA_NOCLDWAIT;
5916 sigaction(SIGCHLD, &act, NULL);
5918 signal(SIGCHLD, SIG_IGN);
5922 /* Save the current store pool point, for resetting at the start of
5923 each message, and save the real sender address, if any. */
5925 real_sender_address = sender_address;
5927 /* Loop to receive messages; receive_msg() returns TRUE if there are more
5928 messages to be read (SMTP input), or FALSE otherwise (not SMTP, or SMTP channel
5931 for (BOOL more = TRUE; more; )
5933 rmark reset_point = store_mark();
5936 /* Handle the SMTP case; call smtp_setup_msg() to deal with the initial SMTP
5937 input and build the recipients list, before calling receive_msg() to read the
5938 message proper. Whatever sender address is given in the SMTP transaction is
5939 often ignored for local senders - we use the actual sender, which is normally
5940 either the underlying user running this process or a -f argument provided by
5941 a trusted caller. It is saved in real_sender_address. The test for whether to
5942 accept the SMTP sender is encapsulated in receive_check_set_sender(). */
5947 if ((rc = smtp_setup_msg()) > 0)
5949 if ( real_sender_address
5950 && !receive_check_set_sender(sender_address))
5952 sender_address = raw_sender = real_sender_address;
5953 sender_address_unrewritten = NULL;
5956 /* For batched SMTP, we have to run the acl_not_smtp_start ACL, since it
5957 isn't really SMTP, so no other ACL will run until the acl_not_smtp one at
5958 the very end. The result of the ACL is ignored (as for other non-SMTP
5959 messages). It is run for its potential side effects. */
5961 if (smtp_batched_input)
5963 GET_OPTION("acl_not_smtp_start");
5964 if (acl_not_smtp_start)
5966 uschar * user_msg, * log_msg;
5967 f.enable_dollar_recipients = TRUE;
5968 (void)acl_check(ACL_WHERE_NOTSMTP_START, NULL, acl_not_smtp_start,
5969 &user_msg, &log_msg);
5970 f.enable_dollar_recipients = FALSE;
5974 /* Now get the data for the message */
5976 more = receive_msg(extract_recipients);
5979 cancel_cutthrough_connection(TRUE, US"receive dropped");
5980 if (more) goto MORELOOP;
5981 smtp_log_no_mail(); /* Log no mail if configured */
5982 exim_exit(EXIT_FAILURE);
5987 cancel_cutthrough_connection(TRUE, US"message setup dropped");
5988 smtp_log_no_mail(); /* Log no mail if configured */
5989 exim_exit(rc ? EXIT_FAILURE : EXIT_SUCCESS);
5993 /* In the non-SMTP case, we have all the information from the command
5994 line, but must process it in case it is in the more general RFC822
5995 format, and in any case, to detect syntax errors. Also, it appears that
5996 the use of comma-separated lists as single arguments is common, so we
5997 had better support them. */
6001 uschar * rme = expand_string(recipients_max);
6002 int rcount = 0, count = argc - recipients_arg;
6003 const uschar ** list = argv + recipients_arg;
6005 recipients_max_expanded = atoi(CCS rme);
6007 /* These options cannot be changed dynamically for non-SMTP messages */
6009 f.active_local_sender_retain = local_sender_retain;
6010 f.active_local_from_check = local_from_check;
6012 /* Save before any rewriting */
6014 raw_sender = string_copy(sender_address);
6016 /* Loop for each argument (supplied by user hence tainted) */
6018 for (int i = 0; i < count; i++)
6020 int start, end, domain;
6022 /* There can be multiple addresses, so EXIM_DISPLAYMAIL_MAX (tuned for 1) is too short.
6023 We'll still want to cap it to something, just in case. */
6024 uschar * s = string_copy_taint(
6025 exim_str_fail_toolong(list[i], BIG_BUFFER_SIZE, "address argument"),
6028 /* Loop for each comma-separated address */
6032 BOOL finished = FALSE;
6034 uschar * ss = parse_find_address_end(s, FALSE);
6036 if (*ss == ',') *ss = 0; else finished = TRUE;
6038 /* Check max recipients - if -t was used, these aren't recipients */
6040 if ( recipients_max_expanded > 0 && ++rcount > recipients_max_expanded
6041 && !extract_recipients)
6043 DEBUG(D_all) debug_printf("excess reipients (max %d)\n",
6044 recipients_max_expanded);
6046 if (error_handling == ERRORS_STDERR)
6048 fprintf(stderr, "exim: too many recipients\n");
6049 exim_exit(EXIT_FAILURE);
6053 moan_to_sender(ERRMESS_TOOMANYRECIP, NULL, NULL, stdin, TRUE)?
6054 errors_sender_rc : EXIT_FAILURE;
6059 BOOL b = allow_utf8_domains;
6060 allow_utf8_domains = TRUE;
6063 parse_extract_address(s, &errmess, &start, &end, &domain, FALSE);
6067 if (string_is_utf8(recipient)) message_smtputf8 = TRUE;
6068 else allow_utf8_domains = b;
6073 if (domain == 0 && !f.allow_unqualified_recipient)
6076 errmess = US"unqualified recipient address not allowed";
6081 DEBUG(D_all) debug_printf("bad recipient address \"%s\": %s\n",
6082 string_printing(list[i]), errmess);
6084 if (error_handling == ERRORS_STDERR)
6086 fprintf(stderr, "exim: bad recipient address \"%s\": %s\n",
6087 string_printing(list[i]), errmess);
6088 exim_exit(EXIT_FAILURE);
6094 eblock.text1 = string_printing(list[i]);
6095 eblock.text2 = errmess;
6097 moan_to_sender(ERRMESS_BADARGADDRESS, &eblock, NULL, stdin, TRUE)?
6098 errors_sender_rc : EXIT_FAILURE;
6102 receive_add_recipient(string_copy_taint(recipient, GET_TAINTED), -1);
6105 while (*++s && (*s == ',' || isspace(*s)));
6109 /* Show the recipients when debugging */
6113 if (sender_address) debug_printf("Sender: %s\n", sender_address);
6114 if (recipients_list)
6116 debug_printf("Recipients:\n");
6117 for (int i = 0; i < recipients_count; i++)
6118 debug_printf(" %s\n", recipients_list[i].address);
6122 /* Run the acl_not_smtp_start ACL if required. The result of the ACL is
6123 ignored; rejecting here would just add complication, and it can just as
6124 well be done later. Allow $recipients to be visible in the ACL. */
6126 GET_OPTION("acl_not_smtp_start");
6127 if (acl_not_smtp_start)
6129 uschar * user_msg, * log_msg;
6130 f.enable_dollar_recipients = TRUE;
6131 (void)acl_check(ACL_WHERE_NOTSMTP_START, NULL, acl_not_smtp_start,
6132 &user_msg, &log_msg);
6133 f.enable_dollar_recipients = FALSE;
6136 /* Pause for a while waiting for input. If none received in that time,
6137 close the logfile, if we had one open; then if we wait for a long-running
6138 datasource (months, in one use-case) log rotation will not leave us holding
6141 if (!receive_timeout)
6142 if (poll_one_fd(0, POLLIN, 30*60*1000) == 0) /* 30 minutes */
6145 /* Read the data for the message. If filter_test is not FTEST_NONE, this
6146 will just read the headers for the message, and not write anything onto the
6149 message_ended = END_NOTENDED;
6150 more = receive_msg(extract_recipients);
6152 /* more is always FALSE here (not SMTP message) when reading a message
6153 for real; when reading the headers of a message for filter testing,
6154 it is TRUE if the headers were terminated by '.' and FALSE otherwise. */
6156 if (!message_id[0]) exim_exit(EXIT_FAILURE);
6157 } /* Non-SMTP message reception */
6159 /* If this is a filter testing run, there are headers in store, but
6160 no message on the spool. Run the filtering code in testing mode, setting
6161 the domain to the qualify domain and the local part to the current user,
6162 unless they have been set by options. The prefix and suffix are left unset
6163 unless specified. The the return path is set to to the sender unless it has
6164 already been set from a return-path header in the message. */
6166 if (filter_test != FTEST_NONE)
6168 deliver_domain = ftest_domain ? ftest_domain : qualify_domain_recipient;
6169 deliver_domain_orig = deliver_domain;
6170 deliver_localpart = ftest_localpart ? US ftest_localpart : originator_login;
6171 deliver_localpart_orig = deliver_localpart;
6172 deliver_localpart_prefix = US ftest_prefix;
6173 deliver_localpart_suffix = US ftest_suffix;
6174 deliver_home = originator_home;
6178 printf("Return-path copied from sender\n");
6179 return_path = string_copy(sender_address);
6182 printf("Return-path = %s\n", (return_path[0] == 0)? US"<>" : return_path);
6183 printf("Sender = %s\n", (sender_address[0] == 0)? US"<>" : sender_address);
6185 receive_add_recipient(
6186 string_sprintf("%s%s%s@%s",
6187 ftest_prefix ? ftest_prefix : US"",
6189 ftest_suffix ? ftest_suffix : US"",
6190 deliver_domain), -1);
6192 printf("Recipient = %s\n", recipients_list[0].address);
6193 if (ftest_prefix) printf("Prefix = %s\n", ftest_prefix);
6194 if (ftest_suffix) printf("Suffix = %s\n", ftest_suffix);
6196 if (chdir("/")) /* Get away from wherever the user is running this from */
6198 DEBUG(D_receive) debug_printf("chdir(\"/\") failed\n");
6199 exim_exit(EXIT_FAILURE);
6202 /* Now we run either a system filter test, or a user filter test, or both.
6203 In the latter case, headers added by the system filter will persist and be
6204 available to the user filter. We need to copy the filter variables
6207 if (filter_test & FTEST_SYSTEM)
6208 if (!filter_runtest(filter_sfd, filter_test_sfile, TRUE, more))
6209 exim_exit(EXIT_FAILURE);
6211 memcpy(filter_sn, filter_n, sizeof(filter_sn));
6213 if (filter_test & FTEST_USER)
6214 if (!filter_runtest(filter_ufd, filter_test_ufile, FALSE, more))
6215 exim_exit(EXIT_FAILURE);
6217 exim_exit(EXIT_SUCCESS);
6220 /* Else act on the result of message reception. We should not get here unless
6221 message_id[0] is non-zero. If queue_only is set, session_local_queue_only
6222 will be TRUE. If it is not, check on the number of messages received in this
6225 if ( !session_local_queue_only
6226 && smtp_accept_queue_per_connection > 0
6227 && receive_messagecount > smtp_accept_queue_per_connection)
6229 session_local_queue_only = TRUE;
6230 queue_only_reason = 2;
6233 /* Initialize local_queue_only from session_local_queue_only. If it is false,
6234 and queue_only_load is set, check that the load average is below it. If it is
6235 not, set local_queue_only TRUE. If queue_only_load_latch is true (the
6236 default), we put the whole session into queue_only mode. It then remains this
6237 way for any subsequent messages on the same SMTP connection. This is a
6238 deliberate choice; even though the load average may fall, it doesn't seem
6239 right to deliver later messages on the same call when not delivering earlier
6240 ones. However, there are odd cases where this is not wanted, so this can be
6241 changed by setting queue_only_load_latch false. */
6243 if (!(local_queue_only = session_local_queue_only) && queue_only_load >= 0)
6244 if ((local_queue_only = (load_average = OS_GETLOADAVG()) > queue_only_load))
6246 queue_only_reason = 3;
6247 if (queue_only_load_latch) session_local_queue_only = TRUE;
6250 /* If running as an MUA wrapper, all queueing options and freezing options
6254 local_queue_only = f.queue_only_policy = f.deliver_freeze = FALSE;
6256 /* Log the queueing here, when it will get a message id attached, but
6257 not if queue_only is set (case 0). Case 1 doesn't happen here (too many
6260 if (local_queue_only)
6262 cancel_cutthrough_connection(TRUE, US"no delivery; queueing");
6263 switch(queue_only_reason)
6266 log_write(L_delay_delivery,
6267 LOG_MAIN, "no immediate delivery: more than %d messages "
6268 "received in one connection", smtp_accept_queue_per_connection);
6272 log_write(L_delay_delivery,
6273 LOG_MAIN, "no immediate delivery: load average %.2f",
6274 (double)load_average/1000.0);
6279 else if (f.queue_only_policy || f.deliver_freeze)
6280 cancel_cutthrough_connection(TRUE, US"no delivery; queueing");
6282 /* Else do the delivery unless the ACL or local_scan() called for queue only
6283 or froze the message. Always deliver in a separate process. A fork failure is
6284 not a disaster, as the delivery will eventually happen on a subsequent queue
6285 run. The search cache must be tidied before the fork, as the parent will
6286 do it before exiting. The child will trigger a lookup failure and
6287 thereby defer the delivery if it tries to use (for example) a cached ldap
6288 connection that the parent has called unbind on. */
6295 if ((pid = exim_fork(US"local-accept-delivery")) == 0)
6298 close_unwanted(); /* Close unwanted file descriptors and TLS */
6299 exim_nullstd(); /* Ensure std{in,out,err} exist */
6301 /* Re-exec Exim if we need to regain privilege (note: in mua_wrapper
6302 mode, deliver_drop_privilege is forced TRUE). */
6304 if (geteuid() != root_uid && !deliver_drop_privilege && !unprivileged)
6306 delivery_re_exec(CEE_EXEC_EXIT);
6307 /* Control does not return here. */
6310 /* No need to re-exec */
6312 rc = deliver_message(message_id, FALSE, FALSE);
6314 exim_underbar_exit(!mua_wrapper || rc == DELIVER_MUA_SUCCEEDED
6315 ? EXIT_SUCCESS : EXIT_FAILURE);
6320 cancel_cutthrough_connection(TRUE, US"delivery fork failed");
6321 log_write(0, LOG_MAIN|LOG_PANIC, "failed to fork automatic delivery "
6322 "process: %s", strerror(errno));
6326 release_cutthrough_connection(US"msg passed for delivery");
6328 /* In the parent, wait if synchronous delivery is required. This will
6329 always be the case in MUA wrapper mode. */
6331 if (f.synchronous_delivery)
6334 while (wait(&status) != pid);
6335 if ((status & 0x00ff) != 0)
6336 log_write(0, LOG_MAIN|LOG_PANIC,
6337 "process %d crashed with signal %d while delivering %s",
6338 (int)pid, status & 0x00ff, message_id);
6339 if (mua_wrapper && (status & 0xffff) != 0) exim_exit(EXIT_FAILURE);
6344 /* The loop will repeat if more is TRUE. If we do not know know that the OS
6345 automatically reaps children (see comments above the loop), clear away any
6346 finished subprocesses here, in case there are lots of messages coming in
6347 from the same source. */
6349 #ifndef SIG_IGN_WORKS
6350 while (waitpid(-1, NULL, WNOHANG) > 0);
6354 return_path = sender_address = NULL;
6355 authenticated_sender = NULL;
6356 deliver_localpart_orig = NULL;
6357 deliver_domain_orig = NULL;
6358 deliver_host = deliver_host_address = NULL;
6359 dnslist_domain = dnslist_matched = NULL;
6360 #ifdef WITH_CONTENT_SCAN
6361 malware_name = NULL;
6364 callout_address = NULL;
6365 sending_ip_address = NULL;
6366 deliver_localpart_data = deliver_domain_data =
6367 recipient_data = sender_data = NULL;
6369 lookup_value = NULL; /* Can be set by ACL */
6371 store_reset(reset_point);
6374 exim_exit(EXIT_SUCCESS); /* Never returns */
6375 return 0; /* To stop compiler warning */