1 /*************************************************
2 * Exim - an Internet mail transport agent *
3 *************************************************/
5 /* Copyright (c) University of Cambridge 1995 - 2016 */
6 /* See the file NOTICE for conditions of use and distribution. */
9 /* The main function: entry point, initialization, and high-level control.
10 Also a few functions that don't naturally fit elsewhere. */
15 #if defined(__GLIBC__) && !defined(__UCLIBC__)
16 # include <gnu/libc-version.h>
20 # include <gnutls/gnutls.h>
21 # if GNUTLS_VERSION_NUMBER < 0x030103 && !defined(DISABLE_OCSP)
26 extern void init_lookup_list(void);
30 /*************************************************
31 * Function interface to store functions *
32 *************************************************/
34 /* We need some real functions to pass to the PCRE regular expression library
35 for store allocation via Exim's store manager. The normal calls are actually
36 macros that pass over location information to make tracing easier. These
37 functions just interface to the standard macro calls. A good compiler will
38 optimize out the tail recursion and so not make them too expensive. There
39 are two sets of functions; one for use when we want to retain the compiled
40 regular expression for a long time; the other for short-term use. */
43 function_store_get(size_t size
)
45 return store_get((int)size
);
49 function_dummy_free(void *block
) { block
= block
; }
52 function_store_malloc(size_t size
)
54 return store_malloc((int)size
);
58 function_store_free(void *block
)
66 /*************************************************
67 * Enums for cmdline interface *
68 *************************************************/
70 enum commandline_info
{ CMDINFO_NONE
=0,
71 CMDINFO_HELP
, CMDINFO_SIEVE
, CMDINFO_DSCP
};
76 /*************************************************
77 * Compile regular expression and panic on fail *
78 *************************************************/
80 /* This function is called when failure to compile a regular expression leads
81 to a panic exit. In other cases, pcre_compile() is called directly. In many
82 cases where this function is used, the results of the compilation are to be
83 placed in long-lived store, so we temporarily reset the store management
84 functions that PCRE uses if the use_malloc flag is set.
87 pattern the pattern to compile
88 caseless TRUE if caseless matching is required
89 use_malloc TRUE if compile into malloc store
91 Returns: pointer to the compiled pattern
95 regex_must_compile(const uschar
*pattern
, BOOL caseless
, BOOL use_malloc
)
98 int options
= PCRE_COPT
;
103 pcre_malloc
= function_store_malloc
;
104 pcre_free
= function_store_free
;
106 if (caseless
) options
|= PCRE_CASELESS
;
107 yield
= pcre_compile(CCS pattern
, options
, (const char **)&error
, &offset
, NULL
);
108 pcre_malloc
= function_store_get
;
109 pcre_free
= function_dummy_free
;
111 log_write(0, LOG_MAIN
|LOG_PANIC_DIE
, "regular expression error: "
112 "%s at offset %d while compiling %s", error
, offset
, pattern
);
119 /*************************************************
120 * Execute regular expression and set strings *
121 *************************************************/
123 /* This function runs a regular expression match, and sets up the pointers to
124 the matched substrings.
127 re the compiled expression
128 subject the subject string
129 options additional PCRE options
130 setup if < 0 do full setup
131 if >= 0 setup from setup+1 onwards,
132 excluding the full matched string
134 Returns: TRUE or FALSE
138 regex_match_and_setup(const pcre
*re
, const uschar
*subject
, int options
, int setup
)
140 int ovector
[3*(EXPAND_MAXN
+1)];
141 uschar
* s
= string_copy(subject
); /* de-constifying */
142 int n
= pcre_exec(re
, NULL
, CS s
, Ustrlen(s
), 0,
143 PCRE_EOPT
| options
, ovector
, sizeof(ovector
)/sizeof(int));
145 if (n
== 0) n
= EXPAND_MAXN
+ 1;
149 expand_nmax
= (setup
< 0)? 0 : setup
+ 1;
150 for (nn
= (setup
< 0)? 0 : 2; nn
< n
*2; nn
+= 2)
152 expand_nstring
[expand_nmax
] = s
+ ovector
[nn
];
153 expand_nlength
[expand_nmax
++] = ovector
[nn
+1] - ovector
[nn
];
163 /*************************************************
164 * Set up processing details *
165 *************************************************/
167 /* Save a text string for dumping when SIGUSR1 is received.
168 Do checks for overruns.
170 Arguments: format and arguments, as for printf()
175 set_process_info(const char *format
, ...)
177 int len
= sprintf(CS process_info
, "%5d ", (int)getpid());
179 va_start(ap
, format
);
180 if (!string_vformat(process_info
+ len
, PROCESS_INFO_SIZE
- len
- 2, format
, ap
))
181 Ustrcpy(process_info
+ len
, "**** string overflowed buffer ****");
182 len
= Ustrlen(process_info
);
183 process_info
[len
+0] = '\n';
184 process_info
[len
+1] = '\0';
185 process_info_len
= len
+ 1;
186 DEBUG(D_process_info
) debug_printf("set_process_info: %s", process_info
);
193 /*************************************************
194 * Handler for SIGUSR1 *
195 *************************************************/
197 /* SIGUSR1 causes any exim process to write to the process log details of
198 what it is currently doing. It will only be used if the OS is capable of
199 setting up a handler that causes automatic restarting of any system call
200 that is in progress at the time.
202 This function takes care to be signal-safe.
204 Argument: the signal number (SIGUSR1)
209 usr1_handler(int sig
)
213 os_restarting_signal(sig
, usr1_handler
);
215 if ((fd
= Uopen(process_log_path
, O_APPEND
|O_WRONLY
, LOG_MODE
)) < 0)
217 /* If we are already running as the Exim user, try to create it in the
218 current process (assuming spool_directory exists). Otherwise, if we are
219 root, do the creation in an exim:exim subprocess. */
221 int euid
= geteuid();
222 if (euid
== exim_uid
)
223 fd
= Uopen(process_log_path
, O_CREAT
|O_APPEND
|O_WRONLY
, LOG_MODE
);
224 else if (euid
== root_uid
)
225 fd
= log_create_as_exim(process_log_path
);
228 /* If we are neither exim nor root, or if we failed to create the log file,
229 give up. There is not much useful we can do with errors, since we don't want
230 to disrupt whatever is going on outside the signal handler. */
234 (void)write(fd
, process_info
, process_info_len
);
240 /*************************************************
242 *************************************************/
244 /* This handler is enabled most of the time that Exim is running. The handler
245 doesn't actually get used unless alarm() has been called to set a timer, to
246 place a time limit on a system call of some kind. When the handler is run, it
249 There are some other SIGALRM handlers that are used in special cases when more
250 than just a flag setting is required; for example, when reading a message's
251 input. These are normally set up in the code module that uses them, and the
252 SIGALRM handler is reset to this one afterwards.
254 Argument: the signal value (SIGALRM)
259 sigalrm_handler(int sig
)
261 sig
= sig
; /* Keep picky compilers happy */
263 os_non_restarting_signal(SIGALRM
, sigalrm_handler
);
268 /*************************************************
269 * Sleep for a fractional time interval *
270 *************************************************/
272 /* This function is called by millisleep() and exim_wait_tick() to wait for a
273 period of time that may include a fraction of a second. The coding is somewhat
274 tedious. We do not expect setitimer() ever to fail, but if it does, the process
275 will wait for ever, so we panic in this instance. (There was a case of this
276 when a bug in a function that calls milliwait() caused it to pass invalid data.
277 That's when I added the check. :-)
279 We assume it to be not worth sleeping for under 100us; this value will
280 require revisiting as hardware advances. This avoids the issue of
281 a zero-valued timer setting meaning "never fire".
283 Argument: an itimerval structure containing the interval
288 milliwait(struct itimerval
*itval
)
291 sigset_t old_sigmask
;
293 if (itval
->it_value
.tv_usec
< 100 && itval
->it_value
.tv_sec
== 0)
295 (void)sigemptyset(&sigmask
); /* Empty mask */
296 (void)sigaddset(&sigmask
, SIGALRM
); /* Add SIGALRM */
297 (void)sigprocmask(SIG_BLOCK
, &sigmask
, &old_sigmask
); /* Block SIGALRM */
298 if (setitimer(ITIMER_REAL
, itval
, NULL
) < 0) /* Start timer */
299 log_write(0, LOG_MAIN
|LOG_PANIC_DIE
,
300 "setitimer() failed: %s", strerror(errno
));
301 (void)sigfillset(&sigmask
); /* All signals */
302 (void)sigdelset(&sigmask
, SIGALRM
); /* Remove SIGALRM */
303 (void)sigsuspend(&sigmask
); /* Until SIGALRM */
304 (void)sigprocmask(SIG_SETMASK
, &old_sigmask
, NULL
); /* Restore mask */
310 /*************************************************
311 * Millisecond sleep function *
312 *************************************************/
314 /* The basic sleep() function has a granularity of 1 second, which is too rough
315 in some cases - for example, when using an increasing delay to slow down
318 Argument: number of millseconds
325 struct itimerval itval
;
326 itval
.it_interval
.tv_sec
= 0;
327 itval
.it_interval
.tv_usec
= 0;
328 itval
.it_value
.tv_sec
= msec
/1000;
329 itval
.it_value
.tv_usec
= (msec
% 1000) * 1000;
335 /*************************************************
336 * Compare microsecond times *
337 *************************************************/
344 Returns: -1, 0, or +1
348 exim_tvcmp(struct timeval
*t1
, struct timeval
*t2
)
350 if (t1
->tv_sec
> t2
->tv_sec
) return +1;
351 if (t1
->tv_sec
< t2
->tv_sec
) return -1;
352 if (t1
->tv_usec
> t2
->tv_usec
) return +1;
353 if (t1
->tv_usec
< t2
->tv_usec
) return -1;
360 /*************************************************
361 * Clock tick wait function *
362 *************************************************/
364 /* Exim uses a time + a pid to generate a unique identifier in two places: its
365 message IDs, and in file names for maildir deliveries. Because some OS now
366 re-use pids within the same second, sub-second times are now being used.
367 However, for absolute certainty, we must ensure the clock has ticked before
368 allowing the relevant process to complete. At the time of implementation of
369 this code (February 2003), the speed of processors is such that the clock will
370 invariably have ticked already by the time a process has done its job. This
371 function prepares for the time when things are faster - and it also copes with
372 clocks that go backwards.
375 then_tv A timeval which was used to create uniqueness; its usec field
376 has been rounded down to the value of the resolution.
377 We want to be sure the current time is greater than this.
378 resolution The resolution that was used to divide the microseconds
379 (1 for maildir, larger for message ids)
385 exim_wait_tick(struct timeval
*then_tv
, int resolution
)
387 struct timeval now_tv
;
388 long int now_true_usec
;
390 (void)gettimeofday(&now_tv
, NULL
);
391 now_true_usec
= now_tv
.tv_usec
;
392 now_tv
.tv_usec
= (now_true_usec
/resolution
) * resolution
;
394 if (exim_tvcmp(&now_tv
, then_tv
) <= 0)
396 struct itimerval itval
;
397 itval
.it_interval
.tv_sec
= 0;
398 itval
.it_interval
.tv_usec
= 0;
399 itval
.it_value
.tv_sec
= then_tv
->tv_sec
- now_tv
.tv_sec
;
400 itval
.it_value
.tv_usec
= then_tv
->tv_usec
+ resolution
- now_true_usec
;
402 /* We know that, overall, "now" is less than or equal to "then". Therefore, a
403 negative value for the microseconds is possible only in the case when "now"
404 is more than a second less than "then". That means that itval.it_value.tv_sec
405 is greater than zero. The following correction is therefore safe. */
407 if (itval
.it_value
.tv_usec
< 0)
409 itval
.it_value
.tv_usec
+= 1000000;
410 itval
.it_value
.tv_sec
-= 1;
413 DEBUG(D_transport
|D_receive
)
415 if (!running_in_test_harness
)
417 debug_printf("tick check: " TIME_T_FMT
".%06lu " TIME_T_FMT
".%06lu\n",
418 then_tv
->tv_sec
, (long) then_tv
->tv_usec
,
419 now_tv
.tv_sec
, (long) now_tv
.tv_usec
);
420 debug_printf("waiting " TIME_T_FMT
".%06lu\n",
421 itval
.it_value
.tv_sec
, (long) itval
.it_value
.tv_usec
);
432 /*************************************************
433 * Call fopen() with umask 777 and adjust mode *
434 *************************************************/
436 /* Exim runs with umask(0) so that files created with open() have the mode that
437 is specified in the open() call. However, there are some files, typically in
438 the spool directory, that are created with fopen(). They end up world-writeable
439 if no precautions are taken. Although the spool directory is not accessible to
440 the world, this is an untidiness. So this is a wrapper function for fopen()
441 that sorts out the mode of the created file.
444 filename the file name
445 options the fopen() options
446 mode the required mode
448 Returns: the fopened FILE or NULL
452 modefopen(const uschar
*filename
, const char *options
, mode_t mode
)
454 mode_t saved_umask
= umask(0777);
455 FILE *f
= Ufopen(filename
, options
);
456 (void)umask(saved_umask
);
457 if (f
!= NULL
) (void)fchmod(fileno(f
), mode
);
464 /*************************************************
465 * Ensure stdin, stdout, and stderr exist *
466 *************************************************/
468 /* Some operating systems grumble if an exec() happens without a standard
469 input, output, and error (fds 0, 1, 2) being defined. The worry is that some
470 file will be opened and will use these fd values, and then some other bit of
471 code will assume, for example, that it can write error messages to stderr.
472 This function ensures that fds 0, 1, and 2 are open if they do not already
473 exist, by connecting them to /dev/null.
475 This function is also used to ensure that std{in,out,err} exist at all times,
476 so that if any library that Exim calls tries to use them, it doesn't crash.
488 for (i
= 0; i
<= 2; i
++)
490 if (fstat(i
, &statbuf
) < 0 && errno
== EBADF
)
492 if (devnull
< 0) devnull
= open("/dev/null", O_RDWR
);
493 if (devnull
< 0) log_write(0, LOG_MAIN
|LOG_PANIC_DIE
, "%s",
494 string_open_failed(errno
, "/dev/null"));
495 if (devnull
!= i
) (void)dup2(devnull
, i
);
498 if (devnull
> 2) (void)close(devnull
);
504 /*************************************************
505 * Close unwanted file descriptors for delivery *
506 *************************************************/
508 /* This function is called from a new process that has been forked to deliver
509 an incoming message, either directly, or using exec.
511 We want any smtp input streams to be closed in this new process. However, it
512 has been observed that using fclose() here causes trouble. When reading in -bS
513 input, duplicate copies of messages have been seen. The files will be sharing a
514 file pointer with the parent process, and it seems that fclose() (at least on
515 some systems - I saw this on Solaris 2.5.1) messes with that file pointer, at
516 least sometimes. Hence we go for closing the underlying file descriptors.
518 If TLS is active, we want to shut down the TLS library, but without molesting
519 the parent's SSL connection.
521 For delivery of a non-SMTP message, we want to close stdin and stdout (and
522 stderr unless debugging) because the calling process might have set them up as
523 pipes and be waiting for them to close before it waits for the submission
524 process to terminate. If they aren't closed, they hold up the calling process
525 until the initial delivery process finishes, which is not what we want.
527 Exception: We do want it for synchronous delivery!
529 And notwithstanding all the above, if D_resolver is set, implying resolver
530 debugging, leave stdout open, because that's where the resolver writes its
533 When we close stderr (which implies we've also closed stdout), we also get rid
534 of any controlling terminal.
546 tls_close(TRUE
, FALSE
); /* Shut down the TLS library */
548 (void)close(fileno(smtp_in
));
549 (void)close(fileno(smtp_out
));
554 (void)close(0); /* stdin */
555 if ((debug_selector
& D_resolver
) == 0) (void)close(1); /* stdout */
556 if (debug_selector
== 0) /* stderr */
558 if (!synchronous_delivery
)
571 /*************************************************
573 *************************************************/
575 /* This function sets a new uid and gid permanently, optionally calling
576 initgroups() to set auxiliary groups. There are some special cases when running
577 Exim in unprivileged modes. In these situations the effective uid will not be
578 root; if we already have the right effective uid/gid, and don't need to
579 initialize any groups, leave things as they are.
584 igflag TRUE if initgroups() wanted
585 msg text to use in debugging output and failure log
587 Returns: nothing; bombs out on failure
591 exim_setugid(uid_t uid
, gid_t gid
, BOOL igflag
, uschar
*msg
)
593 uid_t euid
= geteuid();
594 gid_t egid
= getegid();
596 if (euid
== root_uid
|| euid
!= uid
|| egid
!= gid
|| igflag
)
598 /* At least one OS returns +1 for initgroups failure, so just check for
603 struct passwd
*pw
= getpwuid(uid
);
606 if (initgroups(pw
->pw_name
, gid
) != 0)
607 log_write(0,LOG_MAIN
|LOG_PANIC_DIE
,"initgroups failed for uid=%ld: %s",
608 (long int)uid
, strerror(errno
));
610 else log_write(0, LOG_MAIN
|LOG_PANIC_DIE
, "cannot run initgroups(): "
611 "no passwd entry for uid=%ld", (long int)uid
);
614 if (setgid(gid
) < 0 || setuid(uid
) < 0)
616 log_write(0, LOG_MAIN
|LOG_PANIC_DIE
, "unable to set gid=%ld or uid=%ld "
617 "(euid=%ld): %s", (long int)gid
, (long int)uid
, (long int)euid
, msg
);
621 /* Debugging output included uid/gid and all groups */
625 int group_count
, save_errno
;
626 gid_t group_list
[NGROUPS_MAX
];
627 debug_printf("changed uid/gid: %s\n uid=%ld gid=%ld pid=%ld\n", msg
,
628 (long int)geteuid(), (long int)getegid(), (long int)getpid());
629 group_count
= getgroups(NGROUPS_MAX
, group_list
);
631 debug_printf(" auxiliary group list:");
635 for (i
= 0; i
< group_count
; i
++) debug_printf(" %d", (int)group_list
[i
]);
637 else if (group_count
< 0)
638 debug_printf(" <error: %s>", strerror(save_errno
));
639 else debug_printf(" <none>");
647 /*************************************************
649 *************************************************/
651 /* Exim exits via this function so that it always clears up any open
657 Returns: does not return
661 exim_exit(int rc
, const uschar
* process
)
665 debug_printf(">>>>>>>>>>>>>>>> Exim pid=%d %s%s%sterminating with rc=%d "
666 ">>>>>>>>>>>>>>>>\n", (int)getpid(),
667 process
? "(" : "", process
, process
? ") " : "", rc
);
674 /*************************************************
675 * Extract port from host address *
676 *************************************************/
678 /* Called to extract the port from the values given to -oMa and -oMi.
679 It also checks the syntax of the address, and terminates it before the
680 port data when a port is extracted.
683 address the address, with possible port on the end
685 Returns: the port, or zero if there isn't one
686 bombs out on a syntax error
690 check_port(uschar
*address
)
692 int port
= host_address_extract_port(address
);
693 if (string_is_ip_address(address
, NULL
) == 0)
695 fprintf(stderr
, "exim abandoned: \"%s\" is not an IP address\n", address
);
703 /*************************************************
704 * Test/verify an address *
705 *************************************************/
707 /* This function is called by the -bv and -bt code. It extracts a working
708 address from a full RFC 822 address. This isn't really necessary per se, but it
709 has the effect of collapsing source routes.
713 flags flag bits for verify_address()
714 exit_value to be set for failures
720 test_address(uschar
*s
, int flags
, int *exit_value
)
722 int start
, end
, domain
;
723 uschar
*parse_error
= NULL
;
724 uschar
*address
= parse_extract_address(s
, &parse_error
, &start
, &end
, &domain
,
728 fprintf(stdout
, "syntax error: %s\n", parse_error
);
733 int rc
= verify_address(deliver_make_addr(address
,TRUE
), stdout
, flags
, -1,
734 -1, -1, NULL
, NULL
, NULL
);
735 if (rc
== FAIL
) *exit_value
= 2;
736 else if (rc
== DEFER
&& *exit_value
== 0) *exit_value
= 1;
742 /*************************************************
743 * Show supported features *
744 *************************************************/
746 /* This function is called for -bV/--version and for -d to output the optional
747 features of the current Exim binary.
749 Arguments: a FILE for printing
754 show_whats_supported(FILE *f
)
758 #ifdef DB_VERSION_STRING
759 fprintf(f
, "Berkeley DB: %s\n", DB_VERSION_STRING
);
760 #elif defined(BTREEVERSION) && defined(HASHVERSION)
762 fprintf(f
, "Probably Berkeley DB version 1.8x (native mode)\n");
764 fprintf(f
, "Probably Berkeley DB version 1.8x (compatibility mode)\n");
766 #elif defined(_DBM_RDONLY) || defined(dbm_dirfno)
767 fprintf(f
, "Probably ndbm\n");
768 #elif defined(USE_TDB)
769 fprintf(f
, "Using tdb\n");
772 fprintf(f
, "Probably GDBM (native mode)\n");
774 fprintf(f
, "Probably GDBM (compatibility mode)\n");
778 fprintf(f
, "Support for:");
779 #ifdef SUPPORT_CRYPTEQ
780 fprintf(f
, " crypteq");
783 fprintf(f
, " iconv()");
788 #ifdef HAVE_SETCLASSRESOURCES
789 fprintf(f
, " use_setclassresources");
798 fprintf(f
, " Expand_dlfunc");
800 #ifdef USE_TCP_WRAPPERS
801 fprintf(f
, " TCPwrappers");
805 fprintf(f
, " GnuTLS");
807 fprintf(f
, " OpenSSL");
810 #ifdef SUPPORT_TRANSLATE_IP_ADDRESS
811 fprintf(f
, " translate_ip_address");
813 #ifdef SUPPORT_MOVE_FROZEN_MESSAGES
814 fprintf(f
, " move_frozen_messages");
816 #ifdef WITH_CONTENT_SCAN
817 fprintf(f
, " Content_Scanning");
822 #ifndef DISABLE_DNSSEC
823 fprintf(f
, " DNSSEC");
825 #ifndef DISABLE_EVENT
826 fprintf(f
, " Event");
838 fprintf(f
, " PROXY");
841 fprintf(f
, " SOCKS");
845 if (tcp_fastopen_ok
) fprintf(f
, " TCP_Fast_Open");
847 #ifdef EXPERIMENTAL_LMDB
848 fprintf(f
, " Experimental_LMDB");
850 #ifdef EXPERIMENTAL_QUEUEFILE
851 fprintf(f
, " Experimental_QUEUEFILE");
853 #ifdef EXPERIMENTAL_SPF
854 fprintf(f
, " Experimental_SPF");
856 #ifdef EXPERIMENTAL_SRS
857 fprintf(f
, " Experimental_SRS");
859 #ifdef EXPERIMENTAL_BRIGHTMAIL
860 fprintf(f
, " Experimental_Brightmail");
862 #ifdef EXPERIMENTAL_DANE
863 fprintf(f
, " Experimental_DANE");
865 #ifdef EXPERIMENTAL_DCC
866 fprintf(f
, " Experimental_DCC");
868 #ifdef EXPERIMENTAL_DMARC
869 fprintf(f
, " Experimental_DMARC");
871 #ifdef EXPERIMENTAL_DSN_INFO
872 fprintf(f
, " Experimental_DSN_info");
876 fprintf(f
, "Lookups (built-in):");
877 #if defined(LOOKUP_LSEARCH) && LOOKUP_LSEARCH!=2
878 fprintf(f
, " lsearch wildlsearch nwildlsearch iplsearch");
880 #if defined(LOOKUP_CDB) && LOOKUP_CDB!=2
883 #if defined(LOOKUP_DBM) && LOOKUP_DBM!=2
884 fprintf(f
, " dbm dbmjz dbmnz");
886 #if defined(LOOKUP_DNSDB) && LOOKUP_DNSDB!=2
887 fprintf(f
, " dnsdb");
889 #if defined(LOOKUP_DSEARCH) && LOOKUP_DSEARCH!=2
890 fprintf(f
, " dsearch");
892 #if defined(LOOKUP_IBASE) && LOOKUP_IBASE!=2
893 fprintf(f
, " ibase");
895 #if defined(LOOKUP_LDAP) && LOOKUP_LDAP!=2
896 fprintf(f
, " ldap ldapdn ldapm");
898 #ifdef EXPERIMENTAL_LMDB
901 #if defined(LOOKUP_MYSQL) && LOOKUP_MYSQL!=2
902 fprintf(f
, " mysql");
904 #if defined(LOOKUP_NIS) && LOOKUP_NIS!=2
905 fprintf(f
, " nis nis0");
907 #if defined(LOOKUP_NISPLUS) && LOOKUP_NISPLUS!=2
908 fprintf(f
, " nisplus");
910 #if defined(LOOKUP_ORACLE) && LOOKUP_ORACLE!=2
911 fprintf(f
, " oracle");
913 #if defined(LOOKUP_PASSWD) && LOOKUP_PASSWD!=2
914 fprintf(f
, " passwd");
916 #if defined(LOOKUP_PGSQL) && LOOKUP_PGSQL!=2
917 fprintf(f
, " pgsql");
919 #if defined(LOOKUP_REDIS) && LOOKUP_REDIS!=2
920 fprintf(f
, " redis");
922 #if defined(LOOKUP_SQLITE) && LOOKUP_SQLITE!=2
923 fprintf(f
, " sqlite");
925 #if defined(LOOKUP_TESTDB) && LOOKUP_TESTDB!=2
926 fprintf(f
, " testdb");
928 #if defined(LOOKUP_WHOSON) && LOOKUP_WHOSON!=2
929 fprintf(f
, " whoson");
933 fprintf(f
, "Authenticators:");
935 fprintf(f
, " cram_md5");
937 #ifdef AUTH_CYRUS_SASL
938 fprintf(f
, " cyrus_sasl");
941 fprintf(f
, " dovecot");
944 fprintf(f
, " gsasl");
946 #ifdef AUTH_HEIMDAL_GSSAPI
947 fprintf(f
, " heimdal_gssapi");
949 #ifdef AUTH_PLAINTEXT
950 fprintf(f
, " plaintext");
960 fprintf(f
, "Routers:");
962 fprintf(f
, " accept");
964 #ifdef ROUTER_DNSLOOKUP
965 fprintf(f
, " dnslookup");
967 #ifdef ROUTER_IPLITERAL
968 fprintf(f
, " ipliteral");
970 #ifdef ROUTER_IPLOOKUP
971 fprintf(f
, " iplookup");
973 #ifdef ROUTER_MANUALROUTE
974 fprintf(f
, " manualroute");
976 #ifdef ROUTER_QUERYPROGRAM
977 fprintf(f
, " queryprogram");
979 #ifdef ROUTER_REDIRECT
980 fprintf(f
, " redirect");
984 fprintf(f
, "Transports:");
985 #ifdef TRANSPORT_APPENDFILE
986 fprintf(f
, " appendfile");
987 #ifdef SUPPORT_MAILDIR
988 fprintf(f
, "/maildir");
990 #ifdef SUPPORT_MAILSTORE
991 fprintf(f
, "/mailstore");
997 #ifdef TRANSPORT_AUTOREPLY
998 fprintf(f
, " autoreply");
1000 #ifdef TRANSPORT_LMTP
1001 fprintf(f
, " lmtp");
1003 #ifdef TRANSPORT_PIPE
1004 fprintf(f
, " pipe");
1006 #ifdef EXPERIMENTAL_QUEUEFILE
1007 fprintf(f
, " queuefile");
1009 #ifdef TRANSPORT_SMTP
1010 fprintf(f
, " smtp");
1014 if (fixed_never_users
[0] > 0)
1017 fprintf(f
, "Fixed never_users: ");
1018 for (i
= 1; i
<= (int)fixed_never_users
[0] - 1; i
++)
1019 fprintf(f
, "%d:", (unsigned int)fixed_never_users
[i
]);
1020 fprintf(f
, "%d\n", (unsigned int)fixed_never_users
[i
]);
1023 fprintf(f
, "Configure owner: %d:%d\n", config_uid
, config_gid
);
1025 fprintf(f
, "Size of off_t: " SIZE_T_FMT
"\n", sizeof(off_t
));
1027 /* Everything else is details which are only worth reporting when debugging.
1028 Perhaps the tls_version_report should move into this too. */
1033 /* clang defines __GNUC__ (at least, for me) so test for it first */
1034 #if defined(__clang__)
1035 fprintf(f
, "Compiler: CLang [%s]\n", __clang_version__
);
1036 #elif defined(__GNUC__)
1037 fprintf(f
, "Compiler: GCC [%s]\n",
1041 "? unknown version ?"
1045 fprintf(f
, "Compiler: <unknown>\n");
1048 #if defined(__GLIBC__) && !defined(__UCLIBC__)
1049 fprintf(f
, "Library version: Glibc: Compile: %d.%d\n",
1050 __GLIBC__
, __GLIBC_MINOR__
);
1051 if (__GLIBC_PREREQ(2, 1))
1052 fprintf(f
, " Runtime: %s\n",
1053 gnu_get_libc_version());
1057 tls_version_report(f
);
1060 utf8_version_report(f
);
1063 for (authi
= auths_available
; *authi
->driver_name
!= '\0'; ++authi
)
1064 if (authi
->version_report
)
1065 (*authi
->version_report
)(f
);
1067 /* PCRE_PRERELEASE is either defined and empty or a bare sequence of
1068 characters; unless it's an ancient version of PCRE in which case it
1070 #ifndef PCRE_PRERELEASE
1071 # define PCRE_PRERELEASE
1074 #define EXPAND_AND_QUOTE(X) QUOTE(X)
1075 fprintf(f
, "Library version: PCRE: Compile: %d.%d%s\n"
1077 PCRE_MAJOR
, PCRE_MINOR
,
1078 EXPAND_AND_QUOTE(PCRE_PRERELEASE
) "",
1081 #undef EXPAND_AND_QUOTE
1084 for (i
= 0; i
< lookup_list_count
; i
++)
1085 if (lookup_list
[i
]->version_report
)
1086 lookup_list
[i
]->version_report(f
);
1088 #ifdef WHITELIST_D_MACROS
1089 fprintf(f
, "WHITELIST_D_MACROS: \"%s\"\n", WHITELIST_D_MACROS
);
1091 fprintf(f
, "WHITELIST_D_MACROS unset\n");
1093 #ifdef TRUSTED_CONFIG_LIST
1094 fprintf(f
, "TRUSTED_CONFIG_LIST: \"%s\"\n", TRUSTED_CONFIG_LIST
);
1096 fprintf(f
, "TRUSTED_CONFIG_LIST unset\n");
1103 /*************************************************
1104 * Show auxiliary information about Exim *
1105 *************************************************/
1108 show_exim_information(enum commandline_info request
, FILE *stream
)
1115 fprintf(stream
, "Oops, something went wrong.\n");
1119 "The -bI: flag takes a string indicating which information to provide.\n"
1120 "If the string is not recognised, you'll get this help (on stderr).\n"
1122 " exim -bI:help this information\n"
1123 " exim -bI:dscp dscp value keywords known\n"
1124 " exim -bI:sieve list of supported sieve extensions, one per line.\n"
1128 for (pp
= exim_sieve_extension_list
; *pp
; ++pp
)
1129 fprintf(stream
, "%s\n", *pp
);
1132 dscp_list_to_stream(stream
);
1138 /*************************************************
1139 * Quote a local part *
1140 *************************************************/
1142 /* This function is used when a sender address or a From: or Sender: header
1143 line is being created from the caller's login, or from an authenticated_id. It
1144 applies appropriate quoting rules for a local part.
1146 Argument: the local part
1147 Returns: the local part, quoted if necessary
1151 local_part_quote(uschar
*lpart
)
1153 BOOL needs_quote
= FALSE
;
1157 for (t
= lpart
; !needs_quote
&& *t
!= 0; t
++)
1159 needs_quote
= !isalnum(*t
) && strchr("!#$%&'*+-/=?^_`{|}~", *t
) == NULL
&&
1160 (*t
!= '.' || t
== lpart
|| t
[1] == 0);
1163 if (!needs_quote
) return lpart
;
1165 g
= string_catn(NULL
, US
"\"", 1);
1169 uschar
*nq
= US
Ustrpbrk(lpart
, "\\\"");
1172 g
= string_cat(g
, lpart
);
1175 g
= string_catn(g
, lpart
, nq
- lpart
);
1176 g
= string_catn(g
, US
"\\", 1);
1177 g
= string_catn(g
, nq
, 1);
1181 g
= string_catn(g
, US
"\"", 1);
1182 return string_from_gstring(g
);
1188 /*************************************************
1189 * Load readline() functions *
1190 *************************************************/
1192 /* This function is called from testing executions that read data from stdin,
1193 but only when running as the calling user. Currently, only -be does this. The
1194 function loads the readline() function library and passes back the functions.
1195 On some systems, it needs the curses library, so load that too, but try without
1196 it if loading fails. All this functionality has to be requested at build time.
1199 fn_readline_ptr pointer to where to put the readline pointer
1200 fn_addhist_ptr pointer to where to put the addhistory function
1202 Returns: the dlopen handle or NULL on failure
1206 set_readline(char * (**fn_readline_ptr
)(const char *),
1207 void (**fn_addhist_ptr
)(const char *))
1210 void *dlhandle_curses
= dlopen("libcurses." DYNLIB_FN_EXT
, RTLD_GLOBAL
|RTLD_LAZY
);
1212 dlhandle
= dlopen("libreadline." DYNLIB_FN_EXT
, RTLD_GLOBAL
|RTLD_NOW
);
1213 if (dlhandle_curses
!= NULL
) dlclose(dlhandle_curses
);
1215 if (dlhandle
!= NULL
)
1217 /* Checked manual pages; at least in GNU Readline 6.1, the prototypes are:
1218 * char * readline (const char *prompt);
1219 * void add_history (const char *string);
1221 *fn_readline_ptr
= (char *(*)(const char*))dlsym(dlhandle
, "readline");
1222 *fn_addhist_ptr
= (void(*)(const char*))dlsym(dlhandle
, "add_history");
1226 DEBUG(D_any
) debug_printf("failed to load readline: %s\n", dlerror());
1235 /*************************************************
1236 * Get a line from stdin for testing things *
1237 *************************************************/
1239 /* This function is called when running tests that can take a number of lines
1240 of input (for example, -be and -bt). It handles continuations and trailing
1241 spaces. And prompting and a blank line output on eof. If readline() is in use,
1242 the arguments are non-NULL and provide the relevant functions.
1245 fn_readline readline function or NULL
1246 fn_addhist addhist function or NULL
1248 Returns: pointer to dynamic memory, or NULL at end of file
1252 get_stdinput(char *(*fn_readline
)(const char *), void(*fn_addhist
)(const char *))
1257 if (!fn_readline
) { printf("> "); fflush(stdout
); }
1261 uschar buffer
[1024];
1265 char *readline_line
= NULL
;
1266 if (fn_readline
!= NULL
)
1268 if ((readline_line
= fn_readline((i
> 0)? "":"> ")) == NULL
) break;
1269 if (*readline_line
!= 0 && fn_addhist
!= NULL
) fn_addhist(readline_line
);
1270 p
= US readline_line
;
1275 /* readline() not in use */
1278 if (Ufgets(buffer
, sizeof(buffer
), stdin
) == NULL
) break;
1282 /* Handle the line */
1284 ss
= p
+ (int)Ustrlen(p
);
1285 while (ss
> p
&& isspace(ss
[-1])) ss
--;
1289 while (p
< ss
&& isspace(*p
)) p
++; /* leading space after cont */
1292 g
= string_catn(g
, p
, ss
- p
);
1295 if (fn_readline
) free(readline_line
);
1298 /* g can only be NULL if ss==p */
1299 if (ss
== p
|| g
->s
[g
->ptr
-1] != '\\')
1303 (void) string_from_gstring(g
);
1306 if (!g
) printf("\n");
1307 return string_from_gstring(g
);
1312 /*************************************************
1313 * Output usage information for the program *
1314 *************************************************/
1316 /* This function is called when there are no recipients
1317 or a specific --help argument was added.
1320 progname information on what name we were called by
1322 Returns: DOES NOT RETURN
1326 exim_usage(uschar
*progname
)
1329 /* Handle specific program invocation variants */
1330 if (Ustrcmp(progname
, US
"-mailq") == 0)
1333 "mailq - list the contents of the mail queue\n\n"
1334 "For a list of options, see the Exim documentation.\n");
1338 /* Generic usage - we output this whatever happens */
1340 "Exim is a Mail Transfer Agent. It is normally called by Mail User Agents,\n"
1341 "not directly from a shell command line. Options and/or arguments control\n"
1342 "what it does when called. For a list of options, see the Exim documentation.\n");
1349 /*************************************************
1350 * Validate that the macros given are okay *
1351 *************************************************/
1353 /* Typically, Exim will drop privileges if macros are supplied. In some
1354 cases, we want to not do so.
1356 Arguments: opt_D_used - true if the commandline had a "-D" option
1357 Returns: true if trusted, false otherwise
1361 macros_trusted(BOOL opt_D_used
)
1363 #ifdef WHITELIST_D_MACROS
1365 uschar
*whitelisted
, *end
, *p
, **whites
, **w
;
1366 int white_count
, i
, n
;
1368 BOOL prev_char_item
, found
;
1373 #ifndef WHITELIST_D_MACROS
1377 /* We only trust -D overrides for some invoking users:
1378 root, the exim run-time user, the optional config owner user.
1379 I don't know why config-owner would be needed, but since they can own the
1380 config files anyway, there's no security risk to letting them override -D. */
1381 if ( ! ((real_uid
== root_uid
)
1382 || (real_uid
== exim_uid
)
1383 #ifdef CONFIGURE_OWNER
1384 || (real_uid
== config_uid
)
1388 debug_printf("macros_trusted rejecting macros for uid %d\n", (int) real_uid
);
1392 /* Get a list of macros which are whitelisted */
1393 whitelisted
= string_copy_malloc(US WHITELIST_D_MACROS
);
1394 prev_char_item
= FALSE
;
1396 for (p
= whitelisted
; *p
!= '\0'; ++p
)
1398 if (*p
== ':' || isspace(*p
))
1403 prev_char_item
= FALSE
;
1406 if (!prev_char_item
)
1407 prev_char_item
= TRUE
;
1414 whites
= store_malloc(sizeof(uschar
*) * (white_count
+1));
1415 for (p
= whitelisted
, i
= 0; (p
!= end
) && (i
< white_count
); ++p
)
1420 if (i
== white_count
)
1422 while (*p
!= '\0' && p
< end
)
1428 /* The list of commandline macros should be very short.
1429 Accept the N*M complexity. */
1430 for (m
= macros
; m
; m
= m
->next
) if (m
->command_line
)
1433 for (w
= whites
; *w
; ++w
)
1434 if (Ustrcmp(*w
, m
->name
) == 0)
1441 if (!m
->replacement
)
1443 if ((len
= m
->replen
) == 0)
1445 n
= pcre_exec(regex_whitelisted_macro
, NULL
, CS m
->replacement
, len
,
1446 0, PCRE_EOPT
, NULL
, 0);
1449 if (n
!= PCRE_ERROR_NOMATCH
)
1450 debug_printf("macros_trusted checking %s returned %d\n", m
->name
, n
);
1454 DEBUG(D_any
) debug_printf("macros_trusted overridden to true by whitelisting\n");
1460 /*************************************************
1461 * Entry point and high-level code *
1462 *************************************************/
1464 /* Entry point for the Exim mailer. Analyse the arguments and arrange to take
1465 the appropriate action. All the necessary functions are present in the one
1466 binary. I originally thought one should split it up, but it turns out that so
1467 much of the apparatus is needed in each chunk that one might as well just have
1468 it all available all the time, which then makes the coding easier as well.
1471 argc count of entries in argv
1472 argv argument strings, with argv[0] being the program name
1474 Returns: EXIT_SUCCESS if terminated successfully
1475 EXIT_FAILURE otherwise, except when a message has been sent
1476 to the sender, and -oee was given
1480 main(int argc
, char **cargv
)
1482 uschar
**argv
= USS cargv
;
1483 int arg_receive_timeout
= -1;
1484 int arg_smtp_receive_timeout
= -1;
1485 int arg_error_handling
= error_handling
;
1486 int filter_sfd
= -1;
1487 int filter_ufd
= -1;
1490 int list_queue_option
= 0;
1492 int msg_action_arg
= -1;
1493 int namelen
= (argv
[0] == NULL
)? 0 : Ustrlen(argv
[0]);
1494 int queue_only_reason
= 0;
1496 int perl_start_option
= 0;
1498 int recipients_arg
= argc
;
1499 int sender_address_domain
= 0;
1500 int test_retry_arg
= -1;
1501 int test_rewrite_arg
= -1;
1502 BOOL arg_queue_only
= FALSE
;
1503 BOOL bi_option
= FALSE
;
1504 BOOL checking
= FALSE
;
1505 BOOL count_queue
= FALSE
;
1506 BOOL expansion_test
= FALSE
;
1507 BOOL extract_recipients
= FALSE
;
1508 BOOL flag_G
= FALSE
;
1509 BOOL flag_n
= FALSE
;
1510 BOOL forced_delivery
= FALSE
;
1511 BOOL f_end_dot
= FALSE
;
1512 BOOL deliver_give_up
= FALSE
;
1513 BOOL list_queue
= FALSE
;
1514 BOOL list_options
= FALSE
;
1515 BOOL list_config
= FALSE
;
1516 BOOL local_queue_only
;
1518 BOOL one_msg_action
= FALSE
;
1519 BOOL opt_D_used
= FALSE
;
1520 BOOL queue_only_set
= FALSE
;
1521 BOOL receiving_message
= TRUE
;
1522 BOOL sender_ident_set
= FALSE
;
1523 BOOL session_local_queue_only
;
1525 BOOL removed_privilege
= FALSE
;
1526 BOOL usage_wanted
= FALSE
;
1527 BOOL verify_address_mode
= FALSE
;
1528 BOOL verify_as_sender
= FALSE
;
1529 BOOL version_printed
= FALSE
;
1530 uschar
*alias_arg
= NULL
;
1531 uschar
*called_as
= US
"";
1532 uschar
*cmdline_syslog_name
= NULL
;
1533 uschar
*start_queue_run_id
= NULL
;
1534 uschar
*stop_queue_run_id
= NULL
;
1535 uschar
*expansion_test_message
= NULL
;
1536 uschar
*ftest_domain
= NULL
;
1537 uschar
*ftest_localpart
= NULL
;
1538 uschar
*ftest_prefix
= NULL
;
1539 uschar
*ftest_suffix
= NULL
;
1540 uschar
*log_oneline
= NULL
;
1541 uschar
*malware_test_file
= NULL
;
1542 uschar
*real_sender_address
;
1543 uschar
*originator_home
= US
"/";
1548 struct stat statbuf
;
1549 pid_t passed_qr_pid
= (pid_t
)0;
1550 int passed_qr_pipe
= -1;
1551 gid_t group_list
[NGROUPS_MAX
];
1553 /* For the -bI: flag */
1554 enum commandline_info info_flag
= CMDINFO_NONE
;
1555 BOOL info_stdout
= FALSE
;
1557 /* Possible options for -R and -S */
1559 static uschar
*rsopts
[] = { US
"f", US
"ff", US
"r", US
"rf", US
"rff" };
1561 /* Need to define this in case we need to change the environment in order
1562 to get rid of a bogus time zone. We have to make it char rather than uschar
1563 because some OS define it in /usr/include/unistd.h. */
1565 extern char **environ
;
1567 /* If the Exim user and/or group and/or the configuration file owner/group were
1568 defined by ref:name at build time, we must now find the actual uid/gid values.
1569 This is a feature to make the lives of binary distributors easier. */
1571 #ifdef EXIM_USERNAME
1572 if (route_finduser(US EXIM_USERNAME
, &pw
, &exim_uid
))
1576 fprintf(stderr
, "exim: refusing to run with uid 0 for \"%s\"\n",
1580 /* If ref:name uses a number as the name, route_finduser() returns
1581 TRUE with exim_uid set and pw coerced to NULL. */
1583 exim_gid
= pw
->pw_gid
;
1584 #ifndef EXIM_GROUPNAME
1588 "exim: ref:name should specify a usercode, not a group.\n"
1589 "exim: can't let you get away with it unless you also specify a group.\n");
1596 fprintf(stderr
, "exim: failed to find uid for user name \"%s\"\n",
1602 #ifdef EXIM_GROUPNAME
1603 if (!route_findgroup(US EXIM_GROUPNAME
, &exim_gid
))
1605 fprintf(stderr
, "exim: failed to find gid for group name \"%s\"\n",
1611 #ifdef CONFIGURE_OWNERNAME
1612 if (!route_finduser(US CONFIGURE_OWNERNAME
, NULL
, &config_uid
))
1614 fprintf(stderr
, "exim: failed to find uid for user name \"%s\"\n",
1615 CONFIGURE_OWNERNAME
);
1620 /* We default the system_filter_user to be the Exim run-time user, as a
1621 sane non-root value. */
1622 system_filter_uid
= exim_uid
;
1624 #ifdef CONFIGURE_GROUPNAME
1625 if (!route_findgroup(US CONFIGURE_GROUPNAME
, &config_gid
))
1627 fprintf(stderr
, "exim: failed to find gid for group name \"%s\"\n",
1628 CONFIGURE_GROUPNAME
);
1633 /* In the Cygwin environment, some initialization used to need doing.
1634 It was fudged in by means of this macro; now no longer but we'll leave
1635 it in case of others. */
1641 /* Check a field which is patched when we are running Exim within its
1642 testing harness; do a fast initial check, and then the whole thing. */
1644 running_in_test_harness
=
1645 *running_status
== '<' && Ustrcmp(running_status
, "<<<testing>>>") == 0;
1647 /* The C standard says that the equivalent of setlocale(LC_ALL, "C") is obeyed
1648 at the start of a program; however, it seems that some environments do not
1649 follow this. A "strange" locale can affect the formatting of timestamps, so we
1652 setlocale(LC_ALL
, "C");
1654 /* Set up the default handler for timing using alarm(). */
1656 os_non_restarting_signal(SIGALRM
, sigalrm_handler
);
1658 /* Ensure we have a buffer for constructing log entries. Use malloc directly,
1659 because store_malloc writes a log entry on failure. */
1661 if (!(log_buffer
= US
malloc(LOG_BUFFER_SIZE
)))
1663 fprintf(stderr
, "exim: failed to get store for log buffer\n");
1667 /* Initialize the default log options. */
1669 bits_set(log_selector
, log_selector_size
, log_default
);
1671 /* Set log_stderr to stderr, provided that stderr exists. This gets reset to
1672 NULL when the daemon is run and the file is closed. We have to use this
1673 indirection, because some systems don't allow writing to the variable "stderr".
1676 if (fstat(fileno(stderr
), &statbuf
) >= 0) log_stderr
= stderr
;
1678 /* Arrange for the PCRE regex library to use our store functions. Note that
1679 the normal calls are actually macros that add additional arguments for
1680 debugging purposes so we have to assign specially constructed functions here.
1681 The default is to use store in the stacking pool, but this is overridden in the
1682 regex_must_compile() function. */
1684 pcre_malloc
= function_store_get
;
1685 pcre_free
= function_dummy_free
;
1687 /* Ensure there is a big buffer for temporary use in several places. It is put
1688 in malloc store so that it can be freed for enlargement if necessary. */
1690 big_buffer
= store_malloc(big_buffer_size
);
1692 /* Set up the handler for the data request signal, and set the initial
1693 descriptive text. */
1695 set_process_info("initializing");
1696 os_restarting_signal(SIGUSR1
, usr1_handler
);
1698 /* SIGHUP is used to get the daemon to reconfigure. It gets set as appropriate
1699 in the daemon code. For the rest of Exim's uses, we ignore it. */
1701 signal(SIGHUP
, SIG_IGN
);
1703 /* We don't want to die on pipe errors as the code is written to handle
1704 the write error instead. */
1706 signal(SIGPIPE
, SIG_IGN
);
1708 /* Under some circumstance on some OS, Exim can get called with SIGCHLD
1709 set to SIG_IGN. This causes subprocesses that complete before the parent
1710 process waits for them not to hang around, so when Exim calls wait(), nothing
1711 is there. The wait() code has been made robust against this, but let's ensure
1712 that SIGCHLD is set to SIG_DFL, because it's tidier to wait and get a process
1713 ending status. We use sigaction rather than plain signal() on those OS where
1714 SA_NOCLDWAIT exists, because we want to be sure it is turned off. (There was a
1715 problem on AIX with this.) */
1719 struct sigaction act
;
1720 act
.sa_handler
= SIG_DFL
;
1721 sigemptyset(&(act
.sa_mask
));
1723 sigaction(SIGCHLD
, &act
, NULL
);
1726 signal(SIGCHLD
, SIG_DFL
);
1729 /* Save the arguments for use if we re-exec exim as a daemon after receiving
1734 /* Set up the version number. Set up the leading 'E' for the external form of
1735 message ids, set the pointer to the internal form, and initialize it to
1736 indicate no message being processed. */
1739 message_id_option
[0] = '-';
1740 message_id_external
= message_id_option
+ 1;
1741 message_id_external
[0] = 'E';
1742 message_id
= message_id_external
+ 1;
1745 /* Set the umask to zero so that any files Exim creates using open() are
1746 created with the modes that it specifies. NOTE: Files created with fopen() have
1747 a problem, which was not recognized till rather late (February 2006). With this
1748 umask, such files will be world writeable. (They are all content scanning files
1749 in the spool directory, which isn't world-accessible, so this is not a
1750 disaster, but it's untidy.) I don't want to change this overall setting,
1751 however, because it will interact badly with the open() calls. Instead, there's
1752 now a function called modefopen() that fiddles with the umask while calling
1757 /* Precompile the regular expression for matching a message id. Keep this in
1758 step with the code that generates ids in the accept.c module. We need to do
1759 this here, because the -M options check their arguments for syntactic validity
1760 using mac_ismsgid, which uses this. */
1763 regex_must_compile(US
"^(?:[^\\W_]{6}-){2}[^\\W_]{2}$", FALSE
, TRUE
);
1765 /* Precompile the regular expression that is used for matching an SMTP error
1766 code, possibly extended, at the start of an error message. Note that the
1767 terminating whitespace character is included. */
1770 regex_must_compile(US
"^\\d\\d\\d\\s(?:\\d\\.\\d\\d?\\d?\\.\\d\\d?\\d?\\s)?",
1773 #ifdef WHITELIST_D_MACROS
1774 /* Precompile the regular expression used to filter the content of macros
1775 given to -D for permissibility. */
1777 regex_whitelisted_macro
=
1778 regex_must_compile(US
"^[A-Za-z0-9_/.-]*$", FALSE
, TRUE
);
1781 for (i
= 0; i
< REGEX_VARS
; i
++) regex_vars
[i
] = NULL
;
1783 /* If the program is called as "mailq" treat it as equivalent to "exim -bp";
1784 this seems to be a generally accepted convention, since one finds symbolic
1785 links called "mailq" in standard OS configurations. */
1787 if ((namelen
== 5 && Ustrcmp(argv
[0], "mailq") == 0) ||
1788 (namelen
> 5 && Ustrncmp(argv
[0] + namelen
- 6, "/mailq", 6) == 0))
1791 receiving_message
= FALSE
;
1792 called_as
= US
"-mailq";
1795 /* If the program is called as "rmail" treat it as equivalent to
1796 "exim -i -oee", thus allowing UUCP messages to be input using non-SMTP mode,
1797 i.e. preventing a single dot on a line from terminating the message, and
1798 returning with zero return code, even in cases of error (provided an error
1799 message has been sent). */
1801 if ((namelen
== 5 && Ustrcmp(argv
[0], "rmail") == 0) ||
1802 (namelen
> 5 && Ustrncmp(argv
[0] + namelen
- 6, "/rmail", 6) == 0))
1805 called_as
= US
"-rmail";
1806 errors_sender_rc
= EXIT_SUCCESS
;
1809 /* If the program is called as "rsmtp" treat it as equivalent to "exim -bS";
1810 this is a smail convention. */
1812 if ((namelen
== 5 && Ustrcmp(argv
[0], "rsmtp") == 0) ||
1813 (namelen
> 5 && Ustrncmp(argv
[0] + namelen
- 6, "/rsmtp", 6) == 0))
1815 smtp_input
= smtp_batched_input
= TRUE
;
1816 called_as
= US
"-rsmtp";
1819 /* If the program is called as "runq" treat it as equivalent to "exim -q";
1820 this is a smail convention. */
1822 if ((namelen
== 4 && Ustrcmp(argv
[0], "runq") == 0) ||
1823 (namelen
> 4 && Ustrncmp(argv
[0] + namelen
- 5, "/runq", 5) == 0))
1826 receiving_message
= FALSE
;
1827 called_as
= US
"-runq";
1830 /* If the program is called as "newaliases" treat it as equivalent to
1831 "exim -bi"; this is a sendmail convention. */
1833 if ((namelen
== 10 && Ustrcmp(argv
[0], "newaliases") == 0) ||
1834 (namelen
> 10 && Ustrncmp(argv
[0] + namelen
- 11, "/newaliases", 11) == 0))
1837 receiving_message
= FALSE
;
1838 called_as
= US
"-newaliases";
1841 /* Save the original effective uid for a couple of uses later. It should
1842 normally be root, but in some esoteric environments it may not be. */
1844 original_euid
= geteuid();
1846 /* Get the real uid and gid. If the caller is root, force the effective uid/gid
1847 to be the same as the real ones. This makes a difference only if Exim is setuid
1848 (or setgid) to something other than root, which could be the case in some
1849 special configurations. */
1851 real_uid
= getuid();
1852 real_gid
= getgid();
1854 if (real_uid
== root_uid
)
1856 rv
= setgid(real_gid
);
1859 fprintf(stderr
, "exim: setgid(%ld) failed: %s\n",
1860 (long int)real_gid
, strerror(errno
));
1863 rv
= setuid(real_uid
);
1866 fprintf(stderr
, "exim: setuid(%ld) failed: %s\n",
1867 (long int)real_uid
, strerror(errno
));
1872 /* If neither the original real uid nor the original euid was root, Exim is
1873 running in an unprivileged state. */
1875 unprivileged
= (real_uid
!= root_uid
&& original_euid
!= root_uid
);
1877 /* Scan the program's arguments. Some can be dealt with right away; others are
1878 simply recorded for checking and handling afterwards. Do a high-level switch
1879 on the second character (the one after '-'), to save some effort. */
1881 for (i
= 1; i
< argc
; i
++)
1883 BOOL badarg
= FALSE
;
1884 uschar
*arg
= argv
[i
];
1888 /* An argument not starting with '-' is the start of a recipients list;
1889 break out of the options-scanning loop. */
1897 /* An option consisting of -- terminates the options */
1899 if (Ustrcmp(arg
, "--") == 0)
1901 recipients_arg
= i
+ 1;
1905 /* Handle flagged options */
1907 switchchar
= arg
[1];
1910 /* Make all -ex options synonymous with -oex arguments, since that
1911 is assumed by various callers. Also make -qR options synonymous with -R
1912 options, as that seems to be required as well. Allow for -qqR too, and
1913 the same for -S options. */
1915 if (Ustrncmp(arg
+1, "oe", 2) == 0 ||
1916 Ustrncmp(arg
+1, "qR", 2) == 0 ||
1917 Ustrncmp(arg
+1, "qS", 2) == 0)
1919 switchchar
= arg
[2];
1922 else if (Ustrncmp(arg
+1, "qqR", 3) == 0 || Ustrncmp(arg
+1, "qqS", 3) == 0)
1924 switchchar
= arg
[3];
1926 queue_2stage
= TRUE
;
1929 /* Make -r synonymous with -f, since it is a documented alias */
1931 else if (arg
[1] == 'r') switchchar
= 'f';
1933 /* Make -ov synonymous with -v */
1935 else if (Ustrcmp(arg
, "-ov") == 0)
1941 /* deal with --option_aliases */
1942 else if (switchchar
== '-')
1944 if (Ustrcmp(argrest
, "help") == 0)
1946 usage_wanted
= TRUE
;
1949 else if (Ustrcmp(argrest
, "version") == 0)
1956 /* High-level switch on active initial letter */
1961 /* sendmail uses -Ac and -Am to control which .cf file is used;
1964 if (*argrest
== '\0') { badarg
= TRUE
; break; }
1967 BOOL ignore
= FALSE
;
1972 if (*(argrest
+ 1) == '\0')
1976 if (!ignore
) { badarg
= TRUE
; break; }
1980 /* -Btype is a sendmail option for 7bit/8bit setting. Exim is 8-bit clean
1981 so has no need of it. */
1984 if (*argrest
== 0) i
++; /* Skip over the type */
1989 receiving_message
= FALSE
; /* Reset TRUE for -bm, -bS, -bs below */
1991 /* -bd: Run in daemon mode, awaiting SMTP connections.
1992 -bdf: Ditto, but in the foreground.
1995 if (*argrest
== 'd')
1997 daemon_listen
= TRUE
;
1998 if (*(++argrest
) == 'f') background_daemon
= FALSE
;
1999 else if (*argrest
!= 0) { badarg
= TRUE
; break; }
2002 /* -be: Run in expansion test mode
2003 -bem: Ditto, but read a message from a file first
2006 else if (*argrest
== 'e')
2008 expansion_test
= checking
= TRUE
;
2009 if (argrest
[1] == 'm')
2011 if (++i
>= argc
) { badarg
= TRUE
; break; }
2012 expansion_test_message
= argv
[i
];
2015 if (argrest
[1] != 0) { badarg
= TRUE
; break; }
2018 /* -bF: Run system filter test */
2020 else if (*argrest
== 'F')
2022 filter_test
|= checking
= FTEST_SYSTEM
;
2023 if (*(++argrest
) != 0) { badarg
= TRUE
; break; }
2024 if (++i
< argc
) filter_test_sfile
= argv
[i
]; else
2026 fprintf(stderr
, "exim: file name expected after %s\n", argv
[i
-1]);
2031 /* -bf: Run user filter test
2032 -bfd: Set domain for filter testing
2033 -bfl: Set local part for filter testing
2034 -bfp: Set prefix for filter testing
2035 -bfs: Set suffix for filter testing
2038 else if (*argrest
== 'f')
2040 if (*(++argrest
) == 0)
2042 filter_test
|= checking
= FTEST_USER
;
2043 if (++i
< argc
) filter_test_ufile
= argv
[i
]; else
2045 fprintf(stderr
, "exim: file name expected after %s\n", argv
[i
-1]);
2053 fprintf(stderr
, "exim: string expected after %s\n", arg
);
2056 if (Ustrcmp(argrest
, "d") == 0) ftest_domain
= argv
[i
];
2057 else if (Ustrcmp(argrest
, "l") == 0) ftest_localpart
= argv
[i
];
2058 else if (Ustrcmp(argrest
, "p") == 0) ftest_prefix
= argv
[i
];
2059 else if (Ustrcmp(argrest
, "s") == 0) ftest_suffix
= argv
[i
];
2060 else { badarg
= TRUE
; break; }
2064 /* -bh: Host checking - an IP address must follow. */
2066 else if (Ustrcmp(argrest
, "h") == 0 || Ustrcmp(argrest
, "hc") == 0)
2068 if (++i
>= argc
) { badarg
= TRUE
; break; }
2069 sender_host_address
= argv
[i
];
2070 host_checking
= checking
= log_testing_mode
= TRUE
;
2071 host_checking_callout
= argrest
[1] == 'c';
2072 message_logs
= FALSE
;
2075 /* -bi: This option is used by sendmail to initialize *the* alias file,
2076 though it has the -oA option to specify a different file. Exim has no
2077 concept of *the* alias file, but since Sun's YP make script calls
2078 sendmail this way, some support must be provided. */
2080 else if (Ustrcmp(argrest
, "i") == 0) bi_option
= TRUE
;
2082 /* -bI: provide information, of the type to follow after a colon.
2083 This is an Exim flag. */
2085 else if (argrest
[0] == 'I' && Ustrlen(argrest
) >= 2 && argrest
[1] == ':')
2087 uschar
*p
= &argrest
[2];
2088 info_flag
= CMDINFO_HELP
;
2091 if (strcmpic(p
, CUS
"sieve") == 0)
2093 info_flag
= CMDINFO_SIEVE
;
2096 else if (strcmpic(p
, CUS
"dscp") == 0)
2098 info_flag
= CMDINFO_DSCP
;
2101 else if (strcmpic(p
, CUS
"help") == 0)
2108 /* -bm: Accept and deliver message - the default option. Reinstate
2109 receiving_message, which got turned off for all -b options. */
2111 else if (Ustrcmp(argrest
, "m") == 0) receiving_message
= TRUE
;
2113 /* -bmalware: test the filename given for malware */
2115 else if (Ustrcmp(argrest
, "malware") == 0)
2117 if (++i
>= argc
) { badarg
= TRUE
; break; }
2119 malware_test_file
= argv
[i
];
2122 /* -bnq: For locally originating messages, do not qualify unqualified
2123 addresses. In the envelope, this causes errors; in header lines they
2126 else if (Ustrcmp(argrest
, "nq") == 0)
2128 allow_unqualified_sender
= FALSE
;
2129 allow_unqualified_recipient
= FALSE
;
2132 /* -bpxx: List the contents of the mail queue, in various forms. If
2133 the option is -bpc, just a queue count is needed. Otherwise, if the
2134 first letter after p is r, then order is random. */
2136 else if (*argrest
== 'p')
2138 if (*(++argrest
) == 'c')
2141 if (*(++argrest
) != 0) badarg
= TRUE
;
2145 if (*argrest
== 'r')
2147 list_queue_option
= 8;
2150 else list_queue_option
= 0;
2154 /* -bp: List the contents of the mail queue, top-level only */
2156 if (*argrest
== 0) {}
2158 /* -bpu: List the contents of the mail queue, top-level undelivered */
2160 else if (Ustrcmp(argrest
, "u") == 0) list_queue_option
+= 1;
2162 /* -bpa: List the contents of the mail queue, including all delivered */
2164 else if (Ustrcmp(argrest
, "a") == 0) list_queue_option
+= 2;
2166 /* Unknown after -bp[r] */
2176 /* -bP: List the configuration variables given as the address list.
2177 Force -v, so configuration errors get displayed. */
2179 else if (Ustrcmp(argrest
, "P") == 0)
2181 /* -bP config: we need to setup here, because later,
2182 * when list_options is checked, the config is read already */
2183 if (argv
[i
+1] && Ustrcmp(argv
[i
+1], "config") == 0)
2186 readconf_save_config(version_string
);
2190 list_options
= TRUE
;
2191 debug_selector
|= D_v
;
2192 debug_file
= stderr
;
2196 /* -brt: Test retry configuration lookup */
2198 else if (Ustrcmp(argrest
, "rt") == 0)
2201 test_retry_arg
= i
+ 1;
2205 /* -brw: Test rewrite configuration */
2207 else if (Ustrcmp(argrest
, "rw") == 0)
2210 test_rewrite_arg
= i
+ 1;
2214 /* -bS: Read SMTP commands on standard input, but produce no replies -
2215 all errors are reported by sending messages. */
2217 else if (Ustrcmp(argrest
, "S") == 0)
2218 smtp_input
= smtp_batched_input
= receiving_message
= TRUE
;
2220 /* -bs: Read SMTP commands on standard input and produce SMTP replies
2221 on standard output. */
2223 else if (Ustrcmp(argrest
, "s") == 0) smtp_input
= receiving_message
= TRUE
;
2225 /* -bt: address testing mode */
2227 else if (Ustrcmp(argrest
, "t") == 0)
2228 address_test_mode
= checking
= log_testing_mode
= TRUE
;
2230 /* -bv: verify addresses */
2232 else if (Ustrcmp(argrest
, "v") == 0)
2233 verify_address_mode
= checking
= log_testing_mode
= TRUE
;
2235 /* -bvs: verify sender addresses */
2237 else if (Ustrcmp(argrest
, "vs") == 0)
2239 verify_address_mode
= checking
= log_testing_mode
= TRUE
;
2240 verify_as_sender
= TRUE
;
2243 /* -bV: Print version string and support details */
2245 else if (Ustrcmp(argrest
, "V") == 0)
2247 printf("Exim version %s #%s built %s\n", version_string
,
2248 version_cnumber
, version_date
);
2249 printf("%s\n", CS version_copyright
);
2250 version_printed
= TRUE
;
2251 show_whats_supported(stdout
);
2252 log_testing_mode
= TRUE
;
2255 /* -bw: inetd wait mode, accept a listening socket as stdin */
2257 else if (*argrest
== 'w')
2259 inetd_wait_mode
= TRUE
;
2260 background_daemon
= FALSE
;
2261 daemon_listen
= TRUE
;
2262 if (*(++argrest
) != '\0')
2264 inetd_wait_timeout
= readconf_readtime(argrest
, 0, FALSE
);
2265 if (inetd_wait_timeout
<= 0)
2267 fprintf(stderr
, "exim: bad time value %s: abandoned\n", argv
[i
]);
2277 /* -C: change configuration file list; ignore if it isn't really
2278 a change! Enforce a prefix check if required. */
2283 if(++i
< argc
) argrest
= argv
[i
]; else
2284 { badarg
= TRUE
; break; }
2286 if (Ustrcmp(config_main_filelist
, argrest
) != 0)
2288 #ifdef ALT_CONFIG_PREFIX
2290 int len
= Ustrlen(ALT_CONFIG_PREFIX
);
2291 const uschar
*list
= argrest
;
2293 while((filename
= string_nextinlist(&list
, &sep
, big_buffer
,
2294 big_buffer_size
)) != NULL
)
2296 if ((Ustrlen(filename
) < len
||
2297 Ustrncmp(filename
, ALT_CONFIG_PREFIX
, len
) != 0 ||
2298 Ustrstr(filename
, "/../") != NULL
) &&
2299 (Ustrcmp(filename
, "/dev/null") != 0 || real_uid
!= root_uid
))
2301 fprintf(stderr
, "-C Permission denied\n");
2306 if (real_uid
!= root_uid
)
2308 #ifdef TRUSTED_CONFIG_LIST
2310 if (real_uid
!= exim_uid
2311 #ifdef CONFIGURE_OWNER
2312 && real_uid
!= config_uid
2315 trusted_config
= FALSE
;
2318 FILE *trust_list
= Ufopen(TRUSTED_CONFIG_LIST
, "rb");
2321 struct stat statbuf
;
2323 if (fstat(fileno(trust_list
), &statbuf
) != 0 ||
2324 (statbuf
.st_uid
!= root_uid
/* owner not root */
2325 #ifdef CONFIGURE_OWNER
2326 && statbuf
.st_uid
!= config_uid
/* owner not the special one */
2329 (statbuf
.st_gid
!= root_gid
/* group not root */
2330 #ifdef CONFIGURE_GROUP
2331 && statbuf
.st_gid
!= config_gid
/* group not the special one */
2333 && (statbuf
.st_mode
& 020) != 0 /* group writeable */
2335 (statbuf
.st_mode
& 2) != 0) /* world writeable */
2337 trusted_config
= FALSE
;
2342 /* Well, the trust list at least is up to scratch... */
2343 void *reset_point
= store_get(0);
2344 uschar
*trusted_configs
[32];
2348 while (Ufgets(big_buffer
, big_buffer_size
, trust_list
))
2350 uschar
*start
= big_buffer
, *nl
;
2351 while (*start
&& isspace(*start
))
2355 nl
= Ustrchr(start
, '\n');
2358 trusted_configs
[nr_configs
++] = string_copy(start
);
2359 if (nr_configs
== 32)
2367 const uschar
*list
= argrest
;
2369 while (trusted_config
&& (filename
= string_nextinlist(&list
,
2370 &sep
, big_buffer
, big_buffer_size
)) != NULL
)
2372 for (i
=0; i
< nr_configs
; i
++)
2374 if (Ustrcmp(filename
, trusted_configs
[i
]) == 0)
2377 if (i
== nr_configs
)
2379 trusted_config
= FALSE
;
2383 store_reset(reset_point
);
2387 /* No valid prefixes found in trust_list file. */
2388 trusted_config
= FALSE
;
2394 /* Could not open trust_list file. */
2395 trusted_config
= FALSE
;
2399 /* Not root; don't trust config */
2400 trusted_config
= FALSE
;
2404 config_main_filelist
= argrest
;
2405 config_changed
= TRUE
;
2410 /* -D: set up a macro definition */
2413 #ifdef DISABLE_D_OPTION
2414 fprintf(stderr
, "exim: -D is not available in this Exim binary\n");
2421 uschar
*s
= argrest
;
2424 while (isspace(*s
)) s
++;
2426 if (*s
< 'A' || *s
> 'Z')
2428 fprintf(stderr
, "exim: macro name set by -D must start with "
2429 "an upper case letter\n");
2433 while (isalnum(*s
) || *s
== '_')
2435 if (ptr
< sizeof(name
)-1) name
[ptr
++] = *s
;
2439 if (ptr
== 0) { badarg
= TRUE
; break; }
2440 while (isspace(*s
)) s
++;
2443 if (*s
++ != '=') { badarg
= TRUE
; break; }
2444 while (isspace(*s
)) s
++;
2447 for (m
= macros
; m
; m
= m
->next
)
2448 if (Ustrcmp(m
->name
, name
) == 0)
2450 fprintf(stderr
, "exim: duplicated -D in command line\n");
2454 m
= macro_create(string_copy(name
), string_copy(s
), TRUE
);
2456 if (clmacro_count
>= MAX_CLMACROS
)
2458 fprintf(stderr
, "exim: too many -D options on command line\n");
2461 clmacros
[clmacro_count
++] = string_sprintf("-D%s=%s", m
->name
,
2467 /* -d: Set debug level (see also -v below) or set the drop_cr option.
2468 The latter is now a no-op, retained for compatibility only. If -dd is used,
2469 debugging subprocesses of the daemon is disabled. */
2472 if (Ustrcmp(argrest
, "ropcr") == 0)
2474 /* drop_cr = TRUE; */
2477 /* Use an intermediate variable so that we don't set debugging while
2478 decoding the debugging bits. */
2482 unsigned int selector
= D_default
;
2485 if (*argrest
== 'd')
2487 debug_daemon
= TRUE
;
2491 decode_bits(&selector
, 1, debug_notall
, argrest
,
2492 debug_options
, debug_options_count
, US
"debug", 0);
2493 debug_selector
= selector
;
2498 /* -E: This is a local error message. This option is not intended for
2499 external use at all, but is not restricted to trusted callers because it
2500 does no harm (just suppresses certain error messages) and if Exim is run
2501 not setuid root it won't always be trusted when it generates error
2502 messages using this option. If there is a message id following -E, point
2503 message_reference at it, for logging. */
2506 local_error_message
= TRUE
;
2507 if (mac_ismsgid(argrest
)) message_reference
= argrest
;
2511 /* -ex: The vacation program calls sendmail with the undocumented "-eq"
2512 option, so it looks as if historically the -oex options are also callable
2513 without the leading -o. So we have to accept them. Before the switch,
2514 anything starting -oe has been converted to -e. Exim does not support all
2515 of the sendmail error options. */
2518 if (Ustrcmp(argrest
, "e") == 0)
2520 arg_error_handling
= ERRORS_SENDER
;
2521 errors_sender_rc
= EXIT_SUCCESS
;
2523 else if (Ustrcmp(argrest
, "m") == 0) arg_error_handling
= ERRORS_SENDER
;
2524 else if (Ustrcmp(argrest
, "p") == 0) arg_error_handling
= ERRORS_STDERR
;
2525 else if (Ustrcmp(argrest
, "q") == 0) arg_error_handling
= ERRORS_STDERR
;
2526 else if (Ustrcmp(argrest
, "w") == 0) arg_error_handling
= ERRORS_SENDER
;
2531 /* -F: Set sender's full name, used instead of the gecos entry from
2532 the password file. Since users can usually alter their gecos entries,
2533 there's no security involved in using this instead. The data can follow
2534 the -F or be in the next argument. */
2539 if(++i
< argc
) argrest
= argv
[i
]; else
2540 { badarg
= TRUE
; break; }
2542 originator_name
= argrest
;
2543 sender_name_forced
= TRUE
;
2547 /* -f: Set sender's address - this value is only actually used if Exim is
2548 run by a trusted user, or if untrusted_set_sender is set and matches the
2549 address, except that the null address can always be set by any user. The
2550 test for this happens later, when the value given here is ignored when not
2551 permitted. For an untrusted user, the actual sender is still put in Sender:
2552 if it doesn't match the From: header (unless no_local_from_check is set).
2553 The data can follow the -f or be in the next argument. The -r switch is an
2554 obsolete form of -f but since there appear to be programs out there that
2555 use anything that sendmail has ever supported, better accept it - the
2556 synonymizing is done before the switch above.
2558 At this stage, we must allow domain literal addresses, because we don't
2559 know what the setting of allow_domain_literals is yet. Ditto for trailing
2560 dots and strip_trailing_dot. */
2564 int dummy_start
, dummy_end
;
2568 if (i
+1 < argc
) argrest
= argv
[++i
]; else
2569 { badarg
= TRUE
; break; }
2572 sender_address
= string_sprintf(""); /* Ensure writeable memory */
2575 uschar
*temp
= argrest
+ Ustrlen(argrest
) - 1;
2576 while (temp
>= argrest
&& isspace(*temp
)) temp
--;
2577 if (temp
>= argrest
&& *temp
== '.') f_end_dot
= TRUE
;
2578 allow_domain_literals
= TRUE
;
2579 strip_trailing_dot
= TRUE
;
2581 allow_utf8_domains
= TRUE
;
2583 sender_address
= parse_extract_address(argrest
, &errmess
,
2584 &dummy_start
, &dummy_end
, &sender_address_domain
, TRUE
);
2586 message_smtputf8
= string_is_utf8(sender_address
);
2587 allow_utf8_domains
= FALSE
;
2589 allow_domain_literals
= FALSE
;
2590 strip_trailing_dot
= FALSE
;
2591 if (sender_address
== NULL
)
2593 fprintf(stderr
, "exim: bad -f address \"%s\": %s\n", argrest
, errmess
);
2594 return EXIT_FAILURE
;
2597 sender_address_forced
= TRUE
;
2601 /* -G: sendmail invocation to specify that it's a gateway submission and
2602 sendmail may complain about problems instead of fixing them.
2603 We make it equivalent to an ACL "control = suppress_local_fixups" and do
2604 not at this time complain about problems. */
2610 /* -h: Set the hop count for an incoming message. Exim does not currently
2611 support this; it always computes it by counting the Received: headers.
2612 To put it in will require a change to the spool header file format. */
2617 if(++i
< argc
) argrest
= argv
[i
]; else
2618 { badarg
= TRUE
; break; }
2620 if (!isdigit(*argrest
)) badarg
= TRUE
;
2624 /* -i: Set flag so dot doesn't end non-SMTP input (same as -oi, seems
2625 not to be documented for sendmail but mailx (at least) uses it) */
2628 if (*argrest
== 0) dot_ends
= FALSE
; else badarg
= TRUE
;
2632 /* -L: set the identifier used for syslog; equivalent to setting
2633 syslog_processname in the config file, but needs to be an admin option. */
2636 if (*argrest
== '\0')
2638 if(++i
< argc
) argrest
= argv
[i
]; else
2639 { badarg
= TRUE
; break; }
2641 sz
= Ustrlen(argrest
);
2644 fprintf(stderr
, "exim: the -L syslog name is too long: \"%s\"\n", argrest
);
2645 return EXIT_FAILURE
;
2649 fprintf(stderr
, "exim: the -L syslog name is too short\n");
2650 return EXIT_FAILURE
;
2652 cmdline_syslog_name
= argrest
;
2656 receiving_message
= FALSE
;
2658 /* -MC: continue delivery of another message via an existing open
2659 file descriptor. This option is used for an internal call by the
2660 smtp transport when there is a pending message waiting to go to an
2661 address to which it has got a connection. Five subsequent arguments are
2662 required: transport name, host name, IP address, sequence number, and
2663 message_id. Transports may decline to create new processes if the sequence
2664 number gets too big. The channel is stdin. This (-MC) must be the last
2665 argument. There's a subsequent check that the real-uid is privileged.
2667 If we are running in the test harness. delay for a bit, to let the process
2668 that set this one up complete. This makes for repeatability of the logging,
2671 if (Ustrcmp(argrest
, "C") == 0)
2673 union sockaddr_46 interface_sock
;
2674 EXIM_SOCKLEN_T size
= sizeof(interface_sock
);
2678 fprintf(stderr
, "exim: too many or too few arguments after -MC\n");
2679 return EXIT_FAILURE
;
2682 if (msg_action_arg
>= 0)
2684 fprintf(stderr
, "exim: incompatible arguments\n");
2685 return EXIT_FAILURE
;
2688 continue_transport
= argv
[++i
];
2689 continue_hostname
= argv
[++i
];
2690 continue_host_address
= argv
[++i
];
2691 continue_sequence
= Uatoi(argv
[++i
]);
2692 msg_action
= MSG_DELIVER
;
2693 msg_action_arg
= ++i
;
2694 forced_delivery
= TRUE
;
2695 queue_run_pid
= passed_qr_pid
;
2696 queue_run_pipe
= passed_qr_pipe
;
2698 if (!mac_ismsgid(argv
[i
]))
2700 fprintf(stderr
, "exim: malformed message id %s after -MC option\n",
2702 return EXIT_FAILURE
;
2705 /* Set up $sending_ip_address and $sending_port, unless proxied */
2707 if (!continue_proxy_cipher
)
2708 if (getsockname(fileno(stdin
), (struct sockaddr
*)(&interface_sock
),
2710 sending_ip_address
= host_ntoa(-1, &interface_sock
, NULL
,
2714 fprintf(stderr
, "exim: getsockname() failed after -MC option: %s\n",
2716 return EXIT_FAILURE
;
2719 if (running_in_test_harness
) millisleep(500);
2723 else if (*argrest
== 'C' && argrest
[1] && !argrest
[2])
2727 /* -MCA: set the smtp_authenticated flag; this is useful only when it
2728 precedes -MC (see above). The flag indicates that the host to which
2729 Exim is connected has accepted an AUTH sequence. */
2731 case 'A': smtp_authenticated
= TRUE
; break;
2733 /* -MCD: set the smtp_use_dsn flag; this indicates that the host
2734 that exim is connected to supports the esmtp extension DSN */
2736 case 'D': smtp_peer_options
|= OPTION_DSN
; break;
2738 /* -MCG: set the queue name, to a non-default value */
2740 case 'G': if (++i
< argc
) queue_name
= string_copy(argv
[i
]);
2744 /* -MCK: the peer offered CHUNKING. Must precede -MC */
2746 case 'K': smtp_peer_options
|= OPTION_CHUNKING
; break;
2748 /* -MCP: set the smtp_use_pipelining flag; this is useful only when
2749 it preceded -MC (see above) */
2751 case 'P': smtp_peer_options
|= OPTION_PIPE
; break;
2753 /* -MCQ: pass on the pid of the queue-running process that started
2754 this chain of deliveries and the fd of its synchronizing pipe; this
2755 is useful only when it precedes -MC (see above) */
2757 case 'Q': if (++i
< argc
) passed_qr_pid
= (pid_t
)(Uatol(argv
[i
]));
2759 if (++i
< argc
) passed_qr_pipe
= (int)(Uatol(argv
[i
]));
2763 /* -MCS: set the smtp_use_size flag; this is useful only when it
2764 precedes -MC (see above) */
2766 case 'S': smtp_peer_options
|= OPTION_SIZE
; break;
2769 /* -MCt: similar to -MCT below but the connection is still open
2770 via a proxy proces which handles the TLS context and coding.
2771 Require three arguments for the proxied local address and port,
2772 and the TLS cipher. */
2774 case 't': if (++i
< argc
) sending_ip_address
= argv
[i
];
2776 if (++i
< argc
) sending_port
= (int)(Uatol(argv
[i
]));
2778 if (++i
< argc
) continue_proxy_cipher
= argv
[i
];
2782 /* -MCT: set the tls_offered flag; this is useful only when it
2783 precedes -MC (see above). The flag indicates that the host to which
2784 Exim is connected has offered TLS support. */
2786 case 'T': smtp_peer_options
|= OPTION_TLS
; break;
2789 default: badarg
= TRUE
; break;
2794 /* -M[x]: various operations on the following list of message ids:
2795 -M deliver the messages, ignoring next retry times and thawing
2796 -Mc deliver the messages, checking next retry times, no thawing
2797 -Mf freeze the messages
2798 -Mg give up on the messages
2799 -Mt thaw the messages
2800 -Mrm remove the messages
2801 In the above cases, this must be the last option. There are also the
2802 following options which are followed by a single message id, and which
2803 act on that message. Some of them use the "recipient" addresses as well.
2804 -Mar add recipient(s)
2805 -Mmad mark all recipients delivered
2806 -Mmd mark recipients(s) delivered
2808 -Mset load a message for use with -be
2810 -Mvc show copy (of whole message, in RFC 2822 format)
2815 else if (*argrest
== 0)
2817 msg_action
= MSG_DELIVER
;
2818 forced_delivery
= deliver_force_thaw
= TRUE
;
2820 else if (Ustrcmp(argrest
, "ar") == 0)
2822 msg_action
= MSG_ADD_RECIPIENT
;
2823 one_msg_action
= TRUE
;
2825 else if (Ustrcmp(argrest
, "c") == 0) msg_action
= MSG_DELIVER
;
2826 else if (Ustrcmp(argrest
, "es") == 0)
2828 msg_action
= MSG_EDIT_SENDER
;
2829 one_msg_action
= TRUE
;
2831 else if (Ustrcmp(argrest
, "f") == 0) msg_action
= MSG_FREEZE
;
2832 else if (Ustrcmp(argrest
, "g") == 0)
2834 msg_action
= MSG_DELIVER
;
2835 deliver_give_up
= TRUE
;
2837 else if (Ustrcmp(argrest
, "mad") == 0)
2839 msg_action
= MSG_MARK_ALL_DELIVERED
;
2841 else if (Ustrcmp(argrest
, "md") == 0)
2843 msg_action
= MSG_MARK_DELIVERED
;
2844 one_msg_action
= TRUE
;
2846 else if (Ustrcmp(argrest
, "rm") == 0) msg_action
= MSG_REMOVE
;
2847 else if (Ustrcmp(argrest
, "set") == 0)
2849 msg_action
= MSG_LOAD
;
2850 one_msg_action
= TRUE
;
2852 else if (Ustrcmp(argrest
, "t") == 0) msg_action
= MSG_THAW
;
2853 else if (Ustrcmp(argrest
, "vb") == 0)
2855 msg_action
= MSG_SHOW_BODY
;
2856 one_msg_action
= TRUE
;
2858 else if (Ustrcmp(argrest
, "vc") == 0)
2860 msg_action
= MSG_SHOW_COPY
;
2861 one_msg_action
= TRUE
;
2863 else if (Ustrcmp(argrest
, "vh") == 0)
2865 msg_action
= MSG_SHOW_HEADER
;
2866 one_msg_action
= TRUE
;
2868 else if (Ustrcmp(argrest
, "vl") == 0)
2870 msg_action
= MSG_SHOW_LOG
;
2871 one_msg_action
= TRUE
;
2873 else { badarg
= TRUE
; break; }
2875 /* All the -Mxx options require at least one message id. */
2877 msg_action_arg
= i
+ 1;
2878 if (msg_action_arg
>= argc
)
2880 fprintf(stderr
, "exim: no message ids given after %s option\n", arg
);
2881 return EXIT_FAILURE
;
2884 /* Some require only message ids to follow */
2886 if (!one_msg_action
)
2889 for (j
= msg_action_arg
; j
< argc
; j
++) if (!mac_ismsgid(argv
[j
]))
2891 fprintf(stderr
, "exim: malformed message id %s after %s option\n",
2893 return EXIT_FAILURE
;
2895 goto END_ARG
; /* Remaining args are ids */
2898 /* Others require only one message id, possibly followed by addresses,
2899 which will be handled as normal arguments. */
2903 if (!mac_ismsgid(argv
[msg_action_arg
]))
2905 fprintf(stderr
, "exim: malformed message id %s after %s option\n",
2906 argv
[msg_action_arg
], arg
);
2907 return EXIT_FAILURE
;
2914 /* Some programs seem to call the -om option without the leading o;
2915 for sendmail it askes for "me too". Exim always does this. */
2918 if (*argrest
!= 0) badarg
= TRUE
;
2922 /* -N: don't do delivery - a debugging option that stops transports doing
2923 their thing. It implies debugging at the D_v level. */
2928 dont_deliver
= TRUE
;
2929 debug_selector
|= D_v
;
2930 debug_file
= stderr
;
2936 /* -n: This means "don't alias" in sendmail, apparently.
2937 For normal invocations, it has no effect.
2938 It may affect some other options. */
2944 /* -O: Just ignore it. In sendmail, apparently -O option=value means set
2945 option to the specified value. This form uses long names. We need to handle
2946 -O option=value and -Ooption=value. */
2953 fprintf(stderr
, "exim: string expected after -O\n");
2961 /* -oA: Set an argument for the bi command (sendmail's "alternate alias
2964 if (*argrest
== 'A')
2966 alias_arg
= argrest
+ 1;
2967 if (alias_arg
[0] == 0)
2969 if (i
+1 < argc
) alias_arg
= argv
[++i
]; else
2971 fprintf(stderr
, "exim: string expected after -oA\n");
2977 /* -oB: Set a connection message max value for remote deliveries */
2979 else if (*argrest
== 'B')
2981 uschar
*p
= argrest
+ 1;
2984 if (i
+1 < argc
&& isdigit((argv
[i
+1][0]))) p
= argv
[++i
]; else
2986 connection_max_messages
= 1;
2995 fprintf(stderr
, "exim: number expected after -oB\n");
2998 connection_max_messages
= Uatoi(p
);
3002 /* -odb: background delivery */
3004 else if (Ustrcmp(argrest
, "db") == 0)
3006 synchronous_delivery
= FALSE
;
3007 arg_queue_only
= FALSE
;
3008 queue_only_set
= TRUE
;
3011 /* -odf: foreground delivery (smail-compatible option); same effect as
3012 -odi: interactive (synchronous) delivery (sendmail-compatible option)
3015 else if (Ustrcmp(argrest
, "df") == 0 || Ustrcmp(argrest
, "di") == 0)
3017 synchronous_delivery
= TRUE
;
3018 arg_queue_only
= FALSE
;
3019 queue_only_set
= TRUE
;
3022 /* -odq: queue only */
3024 else if (Ustrcmp(argrest
, "dq") == 0)
3026 synchronous_delivery
= FALSE
;
3027 arg_queue_only
= TRUE
;
3028 queue_only_set
= TRUE
;
3031 /* -odqs: queue SMTP only - do local deliveries and remote routing,
3032 but no remote delivery */
3034 else if (Ustrcmp(argrest
, "dqs") == 0)
3037 arg_queue_only
= FALSE
;
3038 queue_only_set
= TRUE
;
3041 /* -oex: Sendmail error flags. As these are also accepted without the
3042 leading -o prefix, for compatibility with vacation and other callers,
3043 they are handled with -e above. */
3045 /* -oi: Set flag so dot doesn't end non-SMTP input (same as -i)
3046 -oitrue: Another sendmail syntax for the same */
3048 else if (Ustrcmp(argrest
, "i") == 0 ||
3049 Ustrcmp(argrest
, "itrue") == 0)
3052 /* -oM*: Set various characteristics for an incoming message; actually
3053 acted on for trusted callers only. */
3055 else if (*argrest
== 'M')
3059 fprintf(stderr
, "exim: data expected after -o%s\n", argrest
);
3063 /* -oMa: Set sender host address */
3065 if (Ustrcmp(argrest
, "Ma") == 0) sender_host_address
= argv
[++i
];
3067 /* -oMaa: Set authenticator name */
3069 else if (Ustrcmp(argrest
, "Maa") == 0)
3070 sender_host_authenticated
= argv
[++i
];
3072 /* -oMas: setting authenticated sender */
3074 else if (Ustrcmp(argrest
, "Mas") == 0) authenticated_sender
= argv
[++i
];
3076 /* -oMai: setting authenticated id */
3078 else if (Ustrcmp(argrest
, "Mai") == 0) authenticated_id
= argv
[++i
];
3080 /* -oMi: Set incoming interface address */
3082 else if (Ustrcmp(argrest
, "Mi") == 0) interface_address
= argv
[++i
];
3084 /* -oMm: Message reference */
3086 else if (Ustrcmp(argrest
, "Mm") == 0)
3088 if (!mac_ismsgid(argv
[i
+1]))
3090 fprintf(stderr
,"-oMm must be a valid message ID\n");
3093 if (!trusted_config
)
3095 fprintf(stderr
,"-oMm must be called by a trusted user/config\n");
3098 message_reference
= argv
[++i
];
3101 /* -oMr: Received protocol */
3103 else if (Ustrcmp(argrest
, "Mr") == 0)
3105 if (received_protocol
)
3107 fprintf(stderr
, "received_protocol is set already\n");
3110 else received_protocol
= argv
[++i
];
3112 /* -oMs: Set sender host name */
3114 else if (Ustrcmp(argrest
, "Ms") == 0) sender_host_name
= argv
[++i
];
3116 /* -oMt: Set sender ident */
3118 else if (Ustrcmp(argrest
, "Mt") == 0)
3120 sender_ident_set
= TRUE
;
3121 sender_ident
= argv
[++i
];
3124 /* Else a bad argument */
3133 /* -om: Me-too flag for aliases. Exim always does this. Some programs
3134 seem to call this as -m (undocumented), so that is also accepted (see
3137 else if (Ustrcmp(argrest
, "m") == 0) {}
3139 /* -oo: An ancient flag for old-style addresses which still seems to
3140 crop up in some calls (see in SCO). */
3142 else if (Ustrcmp(argrest
, "o") == 0) {}
3144 /* -oP <name>: set pid file path for daemon */
3146 else if (Ustrcmp(argrest
, "P") == 0)
3147 override_pid_file_path
= argv
[++i
];
3149 /* -or <n>: set timeout for non-SMTP acceptance
3150 -os <n>: set timeout for SMTP acceptance */
3152 else if (*argrest
== 'r' || *argrest
== 's')
3154 int *tp
= (*argrest
== 'r')?
3155 &arg_receive_timeout
: &arg_smtp_receive_timeout
;
3156 if (argrest
[1] == 0)
3158 if (i
+1 < argc
) *tp
= readconf_readtime(argv
[++i
], 0, FALSE
);
3160 else *tp
= readconf_readtime(argrest
+ 1, 0, FALSE
);
3163 fprintf(stderr
, "exim: bad time value %s: abandoned\n", argv
[i
]);
3168 /* -oX <list>: Override local_interfaces and/or default daemon ports */
3170 else if (Ustrcmp(argrest
, "X") == 0)
3171 override_local_interfaces
= argv
[++i
];
3173 /* Unknown -o argument */
3179 /* -ps: force Perl startup; -pd force delayed Perl startup */
3183 if (*argrest
== 's' && argrest
[1] == 0)
3185 perl_start_option
= 1;
3188 if (*argrest
== 'd' && argrest
[1] == 0)
3190 perl_start_option
= -1;
3195 /* -panythingelse is taken as the Sendmail-compatible argument -prval:sval,
3196 which sets the host protocol and host name */
3200 if (i
+1 < argc
) argrest
= argv
[++i
]; else
3201 { badarg
= TRUE
; break; }
3208 if (received_protocol
)
3210 fprintf(stderr
, "received_protocol is set already\n");
3214 hn
= Ustrchr(argrest
, ':');
3217 received_protocol
= argrest
;
3221 int old_pool
= store_pool
;
3222 store_pool
= POOL_PERM
;
3223 received_protocol
= string_copyn(argrest
, hn
- argrest
);
3224 store_pool
= old_pool
;
3225 sender_host_name
= hn
+ 1;
3232 receiving_message
= FALSE
;
3233 if (queue_interval
>= 0)
3235 fprintf(stderr
, "exim: -q specified more than once\n");
3239 /* -qq...: Do queue runs in a 2-stage manner */
3241 if (*argrest
== 'q')
3243 queue_2stage
= TRUE
;
3247 /* -qi...: Do only first (initial) deliveries */
3249 if (*argrest
== 'i')
3251 queue_run_first_delivery
= TRUE
;
3255 /* -qf...: Run the queue, forcing deliveries
3256 -qff..: Ditto, forcing thawing as well */
3258 if (*argrest
== 'f')
3260 queue_run_force
= TRUE
;
3261 if (*++argrest
== 'f')
3263 deliver_force_thaw
= TRUE
;
3268 /* -q[f][f]l...: Run the queue only on local deliveries */
3270 if (*argrest
== 'l')
3272 queue_run_local
= TRUE
;
3276 /* -q[f][f][l][G<name>]... Work on the named queue */
3278 if (*argrest
== 'G')
3281 for (argrest
++, i
= 0; argrest
[i
] && argrest
[i
] != '/'; ) i
++;
3282 queue_name
= string_copyn(argrest
, i
);
3284 if (*argrest
== '/') argrest
++;
3287 /* -q[f][f][l][G<name>]: Run the queue, optionally forced, optionally local
3288 only, optionally named, optionally starting from a given message id. */
3290 if (*argrest
== 0 &&
3291 (i
+ 1 >= argc
|| argv
[i
+1][0] == '-' || mac_ismsgid(argv
[i
+1])))
3294 if (i
+1 < argc
&& mac_ismsgid(argv
[i
+1]))
3295 start_queue_run_id
= argv
[++i
];
3296 if (i
+1 < argc
&& mac_ismsgid(argv
[i
+1]))
3297 stop_queue_run_id
= argv
[++i
];
3300 /* -q[f][f][l][G<name>/]<n>: Run the queue at regular intervals, optionally
3301 forced, optionally local only, optionally named. */
3303 else if ((queue_interval
= readconf_readtime(*argrest
? argrest
: argv
[++i
],
3306 fprintf(stderr
, "exim: bad time value %s: abandoned\n", argv
[i
]);
3312 case 'R': /* Synonymous with -qR... */
3313 receiving_message
= FALSE
;
3315 /* -Rf: As -R (below) but force all deliveries,
3316 -Rff: Ditto, but also thaw all frozen messages,
3317 -Rr: String is regex
3318 -Rrf: Regex and force
3319 -Rrff: Regex and force and thaw
3321 in all cases provided there are no further characters in this
3327 for (i
= 0; i
< nelem(rsopts
); i
++)
3328 if (Ustrcmp(argrest
, rsopts
[i
]) == 0)
3330 if (i
!= 2) queue_run_force
= TRUE
;
3331 if (i
>= 2) deliver_selectstring_regex
= TRUE
;
3332 if (i
== 1 || i
== 4) deliver_force_thaw
= TRUE
;
3333 argrest
+= Ustrlen(rsopts
[i
]);
3337 /* -R: Set string to match in addresses for forced queue run to
3338 pick out particular messages. */
3341 deliver_selectstring
= argrest
;
3342 else if (i
+1 < argc
)
3343 deliver_selectstring
= argv
[++i
];
3346 fprintf(stderr
, "exim: string expected after -R\n");
3352 /* -r: an obsolete synonym for -f (see above) */
3355 /* -S: Like -R but works on sender. */
3357 case 'S': /* Synonymous with -qS... */
3358 receiving_message
= FALSE
;
3360 /* -Sf: As -S (below) but force all deliveries,
3361 -Sff: Ditto, but also thaw all frozen messages,
3362 -Sr: String is regex
3363 -Srf: Regex and force
3364 -Srff: Regex and force and thaw
3366 in all cases provided there are no further characters in this
3372 for (i
= 0; i
< nelem(rsopts
); i
++)
3373 if (Ustrcmp(argrest
, rsopts
[i
]) == 0)
3375 if (i
!= 2) queue_run_force
= TRUE
;
3376 if (i
>= 2) deliver_selectstring_sender_regex
= TRUE
;
3377 if (i
== 1 || i
== 4) deliver_force_thaw
= TRUE
;
3378 argrest
+= Ustrlen(rsopts
[i
]);
3382 /* -S: Set string to match in addresses for forced queue run to
3383 pick out particular messages. */
3386 deliver_selectstring_sender
= argrest
;
3387 else if (i
+1 < argc
)
3388 deliver_selectstring_sender
= argv
[++i
];
3391 fprintf(stderr
, "exim: string expected after -S\n");
3396 /* -Tqt is an option that is exclusively for use by the testing suite.
3397 It is not recognized in other circumstances. It allows for the setting up
3398 of explicit "queue times" so that various warning/retry things can be
3399 tested. Otherwise variability of clock ticks etc. cause problems. */
3402 if (running_in_test_harness
&& Ustrcmp(argrest
, "qt") == 0)
3403 fudged_queue_times
= argv
[++i
];
3408 /* -t: Set flag to extract recipients from body of message. */
3411 if (*argrest
== 0) extract_recipients
= TRUE
;
3413 /* -ti: Set flag to extract recipients from body of message, and also
3414 specify that dot does not end the message. */
3416 else if (Ustrcmp(argrest
, "i") == 0)
3418 extract_recipients
= TRUE
;
3422 /* -tls-on-connect: don't wait for STARTTLS (for old clients) */
3425 else if (Ustrcmp(argrest
, "ls-on-connect") == 0) tls_in
.on_connect
= TRUE
;
3432 /* -U: This means "initial user submission" in sendmail, apparently. The
3433 doc claims that in future sendmail may refuse syntactically invalid
3434 messages instead of fixing them. For the moment, we just ignore it. */
3440 /* -v: verify things - this is a very low-level debugging */
3445 debug_selector
|= D_v
;
3446 debug_file
= stderr
;
3452 /* -x: AIX uses this to indicate some fancy 8-bit character stuff:
3454 The -x flag tells the sendmail command that mail from a local
3455 mail program has National Language Support (NLS) extended characters
3456 in the body of the mail item. The sendmail command can send mail with
3457 extended NLS characters across networks that normally corrupts these
3460 As Exim is 8-bit clean, it just ignores this flag. */
3463 if (*argrest
!= 0) badarg
= TRUE
;
3466 /* -X: in sendmail: takes one parameter, logfile, and sends debugging
3467 logs to that file. We swallow the parameter and otherwise ignore it. */
3470 if (*argrest
== '\0')
3473 fprintf(stderr
, "exim: string expected after -X\n");
3479 if (*argrest
== '\0')
3480 if (++i
< argc
) log_oneline
= argv
[i
]; else
3482 fprintf(stderr
, "exim: file name expected after %s\n", argv
[i
-1]);
3487 /* All other initial characters are errors */
3492 } /* End of high-level switch statement */
3494 /* Failed to recognize the option, or syntax error */
3498 fprintf(stderr
, "exim abandoned: unknown, malformed, or incomplete "
3499 "option %s\n", arg
);
3505 /* If -R or -S have been specified without -q, assume a single queue run. */
3507 if ( (deliver_selectstring
|| deliver_selectstring_sender
)
3508 && queue_interval
< 0)
3513 /* If usage_wanted is set we call the usage function - which never returns */
3514 if (usage_wanted
) exim_usage(called_as
);
3516 /* Arguments have been processed. Check for incompatibilities. */
3518 (smtp_input
|| extract_recipients
|| recipients_arg
< argc
) &&
3519 (daemon_listen
|| queue_interval
>= 0 || bi_option
||
3520 test_retry_arg
>= 0 || test_rewrite_arg
>= 0 ||
3521 filter_test
!= FTEST_NONE
|| (msg_action_arg
> 0 && !one_msg_action
))
3524 msg_action_arg
> 0 &&
3525 (daemon_listen
|| queue_interval
> 0 || list_options
||
3526 (checking
&& msg_action
!= MSG_LOAD
) ||
3527 bi_option
|| test_retry_arg
>= 0 || test_rewrite_arg
>= 0)
3530 (daemon_listen
|| queue_interval
> 0) &&
3531 (sender_address
!= NULL
|| list_options
|| list_queue
|| checking
||
3535 daemon_listen
&& queue_interval
== 0
3538 inetd_wait_mode
&& queue_interval
>= 0
3542 (checking
|| smtp_input
|| extract_recipients
||
3543 filter_test
!= FTEST_NONE
|| bi_option
)
3546 verify_address_mode
&&
3547 (address_test_mode
|| smtp_input
|| extract_recipients
||
3548 filter_test
!= FTEST_NONE
|| bi_option
)
3551 address_test_mode
&& (smtp_input
|| extract_recipients
||
3552 filter_test
!= FTEST_NONE
|| bi_option
)
3555 smtp_input
&& (sender_address
!= NULL
|| filter_test
!= FTEST_NONE
||
3559 deliver_selectstring
!= NULL
&& queue_interval
< 0
3562 msg_action
== MSG_LOAD
&&
3563 (!expansion_test
|| expansion_test_message
!= NULL
)
3567 fprintf(stderr
, "exim: incompatible command-line options or arguments\n");
3571 /* If debugging is set up, set the file and the file descriptor to pass on to
3572 child processes. It should, of course, be 2 for stderr. Also, force the daemon
3573 to run in the foreground. */
3575 if (debug_selector
!= 0)
3577 debug_file
= stderr
;
3578 debug_fd
= fileno(debug_file
);
3579 background_daemon
= FALSE
;
3580 if (running_in_test_harness
) millisleep(100); /* lets caller finish */
3581 if (debug_selector
!= D_v
) /* -v only doesn't show this */
3583 debug_printf("Exim version %s uid=%ld gid=%ld pid=%d D=%x\n",
3584 version_string
, (long int)real_uid
, (long int)real_gid
, (int)getpid(),
3586 if (!version_printed
)
3587 show_whats_supported(stderr
);
3591 /* When started with root privilege, ensure that the limits on the number of
3592 open files and the number of processes (where that is accessible) are
3593 sufficiently large, or are unset, in case Exim has been called from an
3594 environment where the limits are screwed down. Not all OS have the ability to
3595 change some of these limits. */
3599 DEBUG(D_any
) debug_print_ids(US
"Exim has no root privilege:");
3605 #ifdef RLIMIT_NOFILE
3606 if (getrlimit(RLIMIT_NOFILE
, &rlp
) < 0)
3608 log_write(0, LOG_MAIN
|LOG_PANIC
, "getrlimit(RLIMIT_NOFILE) failed: %s",
3610 rlp
.rlim_cur
= rlp
.rlim_max
= 0;
3613 /* I originally chose 1000 as a nice big number that was unlikely to
3614 be exceeded. It turns out that some older OS have a fixed upper limit of
3617 if (rlp
.rlim_cur
< 1000)
3619 rlp
.rlim_cur
= rlp
.rlim_max
= 1000;
3620 if (setrlimit(RLIMIT_NOFILE
, &rlp
) < 0)
3622 rlp
.rlim_cur
= rlp
.rlim_max
= 256;
3623 if (setrlimit(RLIMIT_NOFILE
, &rlp
) < 0)
3624 log_write(0, LOG_MAIN
|LOG_PANIC
, "setrlimit(RLIMIT_NOFILE) failed: %s",
3631 if (getrlimit(RLIMIT_NPROC
, &rlp
) < 0)
3633 log_write(0, LOG_MAIN
|LOG_PANIC
, "getrlimit(RLIMIT_NPROC) failed: %s",
3635 rlp
.rlim_cur
= rlp
.rlim_max
= 0;
3638 #ifdef RLIM_INFINITY
3639 if (rlp
.rlim_cur
!= RLIM_INFINITY
&& rlp
.rlim_cur
< 1000)
3641 rlp
.rlim_cur
= rlp
.rlim_max
= RLIM_INFINITY
;
3643 if (rlp
.rlim_cur
< 1000)
3645 rlp
.rlim_cur
= rlp
.rlim_max
= 1000;
3647 if (setrlimit(RLIMIT_NPROC
, &rlp
) < 0)
3648 log_write(0, LOG_MAIN
|LOG_PANIC
, "setrlimit(RLIMIT_NPROC) failed: %s",
3654 /* Exim is normally entered as root (but some special configurations are
3655 possible that don't do this). However, it always spins off sub-processes that
3656 set their uid and gid as required for local delivery. We don't want to pass on
3657 any extra groups that root may belong to, so we want to get rid of them all at
3660 We need to obey setgroups() at this stage, before possibly giving up root
3661 privilege for a changed configuration file, but later on we might need to
3662 check on the additional groups for the admin user privilege - can't do that
3663 till after reading the config, which might specify the exim gid. Therefore,
3664 save the group list here first. */
3666 group_count
= getgroups(NGROUPS_MAX
, group_list
);
3667 if (group_count
< 0)
3669 fprintf(stderr
, "exim: getgroups() failed: %s\n", strerror(errno
));
3673 /* There is a fundamental difference in some BSD systems in the matter of
3674 groups. FreeBSD and BSDI are known to be different; NetBSD and OpenBSD are
3675 known not to be different. On the "different" systems there is a single group
3676 list, and the first entry in it is the current group. On all other versions of
3677 Unix there is a supplementary group list, which is in *addition* to the current
3678 group. Consequently, to get rid of all extraneous groups on a "standard" system
3679 you pass over 0 groups to setgroups(), while on a "different" system you pass
3680 over a single group - the current group, which is always the first group in the
3681 list. Calling setgroups() with zero groups on a "different" system results in
3682 an error return. The following code should cope with both types of system.
3684 However, if this process isn't running as root, setgroups() can't be used
3685 since you have to be root to run it, even if throwing away groups. Not being
3686 root here happens only in some unusual configurations. We just ignore the
3689 if (setgroups(0, NULL
) != 0)
3691 if (setgroups(1, group_list
) != 0 && !unprivileged
)
3693 fprintf(stderr
, "exim: setgroups() failed: %s\n", strerror(errno
));
3698 /* If the configuration file name has been altered by an argument on the
3699 command line (either a new file name or a macro definition) and the caller is
3700 not root, or if this is a filter testing run, remove any setuid privilege the
3701 program has and run as the underlying user.
3703 The exim user is locked out of this, which severely restricts the use of -C
3706 Otherwise, set the real ids to the effective values (should be root unless run
3707 from inetd, which it can either be root or the exim uid, if one is configured).
3709 There is a private mechanism for bypassing some of this, in order to make it
3710 possible to test lots of configurations automatically, without having either to
3711 recompile each time, or to patch in an actual configuration file name and other
3712 values (such as the path name). If running in the test harness, pretend that
3713 configuration file changes and macro definitions haven't happened. */
3716 (!trusted_config
|| /* Config changed, or */
3717 !macros_trusted(opt_D_used
)) && /* impermissible macros and */
3718 real_uid
!= root_uid
&& /* Not root, and */
3719 !running_in_test_harness
/* Not fudged */
3721 expansion_test
/* expansion testing */
3723 filter_test
!= FTEST_NONE
) /* Filter testing */
3725 setgroups(group_count
, group_list
);
3726 exim_setugid(real_uid
, real_gid
, FALSE
,
3727 US
"-C, -D, -be or -bf forces real uid");
3728 removed_privilege
= TRUE
;
3730 /* In the normal case when Exim is called like this, stderr is available
3731 and should be used for any logging information because attempts to write
3732 to the log will usually fail. To arrange this, we unset really_exim. However,
3733 if no stderr is available there is no point - we might as well have a go
3734 at the log (if it fails, syslog will be written).
3736 Note that if the invoker is Exim, the logs remain available. Messing with
3737 this causes unlogged successful deliveries. */
3739 if ((log_stderr
!= NULL
) && (real_uid
!= exim_uid
))
3740 really_exim
= FALSE
;
3743 /* Privilege is to be retained for the moment. It may be dropped later,
3744 depending on the job that this Exim process has been asked to do. For now, set
3745 the real uid to the effective so that subsequent re-execs of Exim are done by a
3748 else exim_setugid(geteuid(), getegid(), FALSE
, US
"forcing real = effective");
3750 /* If testing a filter, open the file(s) now, before wasting time doing other
3751 setups and reading the message. */
3753 if ((filter_test
& FTEST_SYSTEM
) != 0)
3755 filter_sfd
= Uopen(filter_test_sfile
, O_RDONLY
, 0);
3758 fprintf(stderr
, "exim: failed to open %s: %s\n", filter_test_sfile
,
3760 return EXIT_FAILURE
;
3764 if ((filter_test
& FTEST_USER
) != 0)
3766 filter_ufd
= Uopen(filter_test_ufile
, O_RDONLY
, 0);
3769 fprintf(stderr
, "exim: failed to open %s: %s\n", filter_test_ufile
,
3771 return EXIT_FAILURE
;
3775 /* Initialise lookup_list
3776 If debugging, already called above via version reporting.
3777 In either case, we initialise the list of available lookups while running
3778 as root. All dynamically modules are loaded from a directory which is
3779 hard-coded into the binary and is code which, if not a module, would be
3780 part of Exim already. Ability to modify the content of the directory
3781 is equivalent to the ability to modify a setuid binary!
3783 This needs to happen before we read the main configuration. */
3787 if (running_in_test_harness
) smtputf8_advertise_hosts
= NULL
;
3790 /* Read the main runtime configuration data; this gives up if there
3791 is a failure. It leaves the configuration file open so that the subsequent
3792 configuration data for delivery can be read if needed.
3794 NOTE: immediatly after opening the configuration file we change the working
3795 directory to "/"! Later we change to $spool_directory. We do it there, because
3796 during readconf_main() some expansion takes place already. */
3798 /* Store the initial cwd before we change directories */
3799 if ((initial_cwd
= os_getcwd(NULL
, 0)) == NULL
)
3801 perror("exim: can't get the current working directory");
3806 -be[m] expansion test -
3807 -b[fF] filter test new
3809 -bmalware malware_test_file new
3811 -brw rewrite test new
3813 -bv[s] address verify -
3815 -bP <option> (except -bP config, which sets list_config)
3817 If any of these options is set, we suppress warnings about configuration
3818 issues (currently about tls_advertise_hosts and keep_environment not being
3821 readconf_main(checking
|| list_options
);
3823 if (builtin_macros_create_trigger
) DEBUG(D_any
)
3824 debug_printf("Builtin macros created (expensive) due to config line '%.*s'\n",
3825 Ustrlen(builtin_macros_create_trigger
)-1, builtin_macros_create_trigger
);
3827 /* Now in directory "/" */
3829 if (cleanup_environment() == FALSE
)
3830 log_write(0, LOG_PANIC_DIE
, "Can't cleanup environment");
3833 /* If an action on specific messages is requested, or if a daemon or queue
3834 runner is being started, we need to know if Exim was called by an admin user.
3835 This is the case if the real user is root or exim, or if the real group is
3836 exim, or if one of the supplementary groups is exim or a group listed in
3837 admin_groups. We don't fail all message actions immediately if not admin_user,
3838 since some actions can be performed by non-admin users. Instead, set admin_user
3839 for later interrogation. */
3841 if (real_uid
== root_uid
|| real_uid
== exim_uid
|| real_gid
== exim_gid
)
3846 for (i
= 0; i
< group_count
&& !admin_user
; i
++)
3847 if (group_list
[i
] == exim_gid
)
3849 else if (admin_groups
)
3850 for (j
= 1; j
<= (int)admin_groups
[0] && !admin_user
; j
++)
3851 if (admin_groups
[j
] == group_list
[i
])
3855 /* Another group of privileged users are the trusted users. These are root,
3856 exim, and any caller matching trusted_users or trusted_groups. Trusted callers
3857 are permitted to specify sender_addresses with -f on the command line, and
3858 other message parameters as well. */
3860 if (real_uid
== root_uid
|| real_uid
== exim_uid
)
3861 trusted_caller
= TRUE
;
3867 for (i
= 1; i
<= (int)trusted_users
[0] && !trusted_caller
; i
++)
3868 if (trusted_users
[i
] == real_uid
)
3869 trusted_caller
= TRUE
;
3872 for (i
= 1; i
<= (int)trusted_groups
[0] && !trusted_caller
; i
++)
3873 if (trusted_groups
[i
] == real_gid
)
3874 trusted_caller
= TRUE
;
3875 else for (j
= 0; j
< group_count
&& !trusted_caller
; j
++)
3876 if (trusted_groups
[i
] == group_list
[j
])
3877 trusted_caller
= TRUE
;
3880 /* At this point, we know if the user is privileged and some command-line
3881 options become possibly imperssible, depending upon the configuration file. */
3883 if (checking
&& commandline_checks_require_admin
&& !admin_user
) {
3884 fprintf(stderr
, "exim: those command-line flags are set to require admin\n");
3888 /* Handle the decoding of logging options. */
3890 decode_bits(log_selector
, log_selector_size
, log_notall
,
3891 log_selector_string
, log_options
, log_options_count
, US
"log", 0);
3896 debug_printf("configuration file is %s\n", config_main_filename
);
3897 debug_printf("log selectors =");
3898 for (i
= 0; i
< log_selector_size
; i
++)
3899 debug_printf(" %08x", log_selector
[i
]);
3903 /* If domain literals are not allowed, check the sender address that was
3904 supplied with -f. Ditto for a stripped trailing dot. */
3906 if (sender_address
!= NULL
)
3908 if (sender_address
[sender_address_domain
] == '[' && !allow_domain_literals
)
3910 fprintf(stderr
, "exim: bad -f address \"%s\": domain literals not "
3911 "allowed\n", sender_address
);
3912 return EXIT_FAILURE
;
3914 if (f_end_dot
&& !strip_trailing_dot
)
3916 fprintf(stderr
, "exim: bad -f address \"%s.\": domain is malformed "
3917 "(trailing dot not allowed)\n", sender_address
);
3918 return EXIT_FAILURE
;
3922 /* See if an admin user overrode our logging. */
3924 if (cmdline_syslog_name
!= NULL
)
3928 syslog_processname
= cmdline_syslog_name
;
3929 log_file_path
= string_copy(CUS
"syslog");
3933 /* not a panic, non-privileged users should not be able to spam paniclog */
3935 "exim: you lack sufficient privilege to specify syslog process name\n");
3936 return EXIT_FAILURE
;
3940 /* Paranoia check of maximum lengths of certain strings. There is a check
3941 on the length of the log file path in log.c, which will come into effect
3942 if there are any calls to write the log earlier than this. However, if we
3943 get this far but the string is very long, it is better to stop now than to
3944 carry on and (e.g.) receive a message and then have to collapse. The call to
3945 log_write() from here will cause the ultimate panic collapse if the complete
3946 file name exceeds the buffer length. */
3948 if (Ustrlen(log_file_path
) > 200)
3949 log_write(0, LOG_MAIN
|LOG_PANIC_DIE
,
3950 "log_file_path is longer than 200 chars: aborting");
3952 if (Ustrlen(pid_file_path
) > 200)
3953 log_write(0, LOG_MAIN
|LOG_PANIC_DIE
,
3954 "pid_file_path is longer than 200 chars: aborting");
3956 if (Ustrlen(spool_directory
) > 200)
3957 log_write(0, LOG_MAIN
|LOG_PANIC_DIE
,
3958 "spool_directory is longer than 200 chars: aborting");
3960 /* Length check on the process name given to syslog for its TAG field,
3961 which is only permitted to be 32 characters or less. See RFC 3164. */
3963 if (Ustrlen(syslog_processname
) > 32)
3964 log_write(0, LOG_MAIN
|LOG_PANIC_DIE
,
3965 "syslog_processname is longer than 32 chars: aborting");
3970 log_write(0, LOG_MAIN
, "%s", log_oneline
);
3971 return EXIT_SUCCESS
;
3974 return EXIT_FAILURE
;
3976 /* In some operating systems, the environment variable TMPDIR controls where
3977 temporary files are created; Exim doesn't use these (apart from when delivering
3978 to MBX mailboxes), but called libraries such as DBM libraries may require them.
3979 If TMPDIR is found in the environment, reset it to the value defined in the
3980 EXIM_TMPDIR macro, if this macro is defined. For backward compatibility this
3981 macro may be called TMPDIR in old "Local/Makefile"s. It's converted to
3982 EXIM_TMPDIR by the build scripts.
3988 if (environ
) for (p
= USS environ
; *p
; p
++)
3989 if (Ustrncmp(*p
, "TMPDIR=", 7) == 0 && Ustrcmp(*p
+7, EXIM_TMPDIR
) != 0)
3991 uschar
* newp
= store_malloc(Ustrlen(EXIM_TMPDIR
) + 8);
3992 sprintf(CS newp
, "TMPDIR=%s", EXIM_TMPDIR
);
3994 DEBUG(D_any
) debug_printf("reset TMPDIR=%s in environment\n", EXIM_TMPDIR
);
3999 /* Timezone handling. If timezone_string is "utc", set a flag to cause all
4000 timestamps to be in UTC (gmtime() is used instead of localtime()). Otherwise,
4001 we may need to get rid of a bogus timezone setting. This can arise when Exim is
4002 called by a user who has set the TZ variable. This then affects the timestamps
4003 in log files and in Received: headers, and any created Date: header lines. The
4004 required timezone is settable in the configuration file, so nothing can be done
4005 about this earlier - but hopefully nothing will normally be logged earlier than
4006 this. We have to make a new environment if TZ is wrong, but don't bother if
4007 timestamps_utc is set, because then all times are in UTC anyway. */
4009 if (timezone_string
&& strcmpic(timezone_string
, US
"UTC") == 0)
4010 timestamps_utc
= TRUE
;
4013 uschar
*envtz
= US
getenv("TZ");
4015 ? !timezone_string
|| Ustrcmp(timezone_string
, envtz
) != 0
4016 : timezone_string
!= NULL
4019 uschar
**p
= USS environ
;
4023 if (environ
) while (*p
++) count
++;
4024 if (!envtz
) count
++;
4025 newp
= new = store_malloc(sizeof(uschar
*) * (count
+ 1));
4026 if (environ
) for (p
= USS environ
; *p
; p
++)
4027 if (Ustrncmp(*p
, "TZ=", 3) != 0) *newp
++ = *p
;
4028 if (timezone_string
)
4030 *newp
= store_malloc(Ustrlen(timezone_string
) + 4);
4031 sprintf(CS
*newp
++, "TZ=%s", timezone_string
);
4036 DEBUG(D_any
) debug_printf("Reset TZ to %s: time is %s\n", timezone_string
,
4037 tod_stamp(tod_log
));
4041 /* Handle the case when we have removed the setuid privilege because of -C or
4042 -D. This means that the caller of Exim was not root.
4044 There is a problem if we were running as the Exim user. The sysadmin may
4045 expect this case to retain privilege because "the binary was called by the
4046 Exim user", but it hasn't, because either the -D option set macros, or the
4047 -C option set a non-trusted configuration file. There are two possibilities:
4049 (1) If deliver_drop_privilege is set, Exim is not going to re-exec in order
4050 to do message deliveries. Thus, the fact that it is running as a
4051 non-privileged user is plausible, and might be wanted in some special
4052 configurations. However, really_exim will have been set false when
4053 privilege was dropped, to stop Exim trying to write to its normal log
4054 files. Therefore, re-enable normal log processing, assuming the sysadmin
4055 has set up the log directory correctly.
4057 (2) If deliver_drop_privilege is not set, the configuration won't work as
4058 apparently intended, and so we log a panic message. In order to retain
4059 root for -C or -D, the caller must either be root or be invoking a
4060 trusted configuration file (when deliver_drop_privilege is false). */
4062 if ( removed_privilege
4063 && (!trusted_config
|| opt_D_used
)
4064 && real_uid
== exim_uid
)
4065 if (deliver_drop_privilege
)
4066 really_exim
= TRUE
; /* let logging work normally */
4068 log_write(0, LOG_MAIN
|LOG_PANIC
,
4069 "exim user lost privilege for using %s option",
4070 trusted_config
? "-D" : "-C");
4072 /* Start up Perl interpreter if Perl support is configured and there is a
4073 perl_startup option, and the configuration or the command line specifies
4074 initializing starting. Note that the global variables are actually called
4075 opt_perl_xxx to avoid clashing with perl's namespace (perl_*). */
4078 if (perl_start_option
!= 0)
4079 opt_perl_at_start
= (perl_start_option
> 0);
4080 if (opt_perl_at_start
&& opt_perl_startup
!= NULL
)
4083 DEBUG(D_any
) debug_printf("Starting Perl interpreter\n");
4084 errstr
= init_perl(opt_perl_startup
);
4087 fprintf(stderr
, "exim: error in perl_startup code: %s\n", errstr
);
4088 return EXIT_FAILURE
;
4090 opt_perl_started
= TRUE
;
4092 #endif /* EXIM_PERL */
4094 /* Log the arguments of the call if the configuration file said so. This is
4095 a debugging feature for finding out what arguments certain MUAs actually use.
4096 Don't attempt it if logging is disabled, or if listing variables or if
4097 verifying/testing addresses or expansions. */
4099 if (((debug_selector
& D_any
) != 0 || LOGGING(arguments
))
4100 && really_exim
&& !list_options
&& !checking
)
4103 uschar
*p
= big_buffer
;
4104 Ustrcpy(p
, "cwd= (failed)");
4106 Ustrncpy(p
+ 4, initial_cwd
, big_buffer_size
-5);
4109 (void)string_format(p
, big_buffer_size
- (p
- big_buffer
), " %d args:", argc
);
4111 for (i
= 0; i
< argc
; i
++)
4113 int len
= Ustrlen(argv
[i
]);
4114 const uschar
*printing
;
4116 if (p
+ len
+ 8 >= big_buffer
+ big_buffer_size
)
4119 log_write(0, LOG_MAIN
, "%s", big_buffer
);
4120 Ustrcpy(big_buffer
, "...");
4123 printing
= string_printing(argv
[i
]);
4124 if (printing
[0] == 0) quote
= US
"\""; else
4126 const uschar
*pp
= printing
;
4128 while (*pp
!= 0) if (isspace(*pp
++)) { quote
= US
"\""; break; }
4130 p
+= sprintf(CS p
, " %s%.*s%s", quote
, (int)(big_buffer_size
-
4131 (p
- big_buffer
) - 4), printing
, quote
);
4134 if (LOGGING(arguments
))
4135 log_write(0, LOG_MAIN
, "%s", big_buffer
);
4137 debug_printf("%s\n", big_buffer
);
4140 /* Set the working directory to be the top-level spool directory. We don't rely
4141 on this in the code, which always uses fully qualified names, but it's useful
4142 for core dumps etc. Don't complain if it fails - the spool directory might not
4143 be generally accessible and calls with the -C option (and others) have lost
4144 privilege by now. Before the chdir, we try to ensure that the directory exists.
4147 if (Uchdir(spool_directory
) != 0)
4150 (void)directory_make(spool_directory
, US
"", SPOOL_DIRECTORY_MODE
, FALSE
);
4151 dummy
= /* quieten compiler */ Uchdir(spool_directory
);
4152 dummy
= dummy
; /* yet more compiler quietening, sigh */
4155 /* Handle calls with the -bi option. This is a sendmail option to rebuild *the*
4156 alias file. Exim doesn't have such a concept, but this call is screwed into
4157 Sun's YP makefiles. Handle this by calling a configured script, as the real
4158 user who called Exim. The -oA option can be used to pass an argument to the
4163 (void)fclose(config_file
);
4164 if (bi_command
!= NULL
)
4168 argv
[i
++] = bi_command
;
4169 if (alias_arg
!= NULL
) argv
[i
++] = alias_arg
;
4172 setgroups(group_count
, group_list
);
4173 exim_setugid(real_uid
, real_gid
, FALSE
, US
"running bi_command");
4175 DEBUG(D_exec
) debug_printf("exec %.256s %.256s\n", argv
[0],
4176 (argv
[1] == NULL
)? US
"" : argv
[1]);
4178 execv(CS argv
[0], (char *const *)argv
);
4179 fprintf(stderr
, "exim: exec failed: %s\n", strerror(errno
));
4184 DEBUG(D_any
) debug_printf("-bi used but bi_command not set; exiting\n");
4189 /* We moved the admin/trusted check to be immediately after reading the
4190 configuration file. We leave these prints here to ensure that syslog setup,
4191 logfile setup, and so on has already happened. */
4193 if (trusted_caller
) DEBUG(D_any
) debug_printf("trusted user\n");
4194 if (admin_user
) DEBUG(D_any
) debug_printf("admin user\n");
4196 /* Only an admin user may start the daemon or force a queue run in the default
4197 configuration, but the queue run restriction can be relaxed. Only an admin
4198 user may request that a message be returned to its sender forthwith. Only an
4199 admin user may specify a debug level greater than D_v (because it might show
4200 passwords, etc. in lookup queries). Only an admin user may request a queue
4201 count. Only an admin user can use the test interface to scan for email
4202 (because Exim will be in the spool dir and able to look at mails). */
4206 BOOL debugset
= (debug_selector
& ~D_v
) != 0;
4207 if (deliver_give_up
|| daemon_listen
|| malware_test_file
||
4208 (count_queue
&& queue_list_requires_admin
) ||
4209 (list_queue
&& queue_list_requires_admin
) ||
4210 (queue_interval
>= 0 && prod_requires_admin
) ||
4211 (debugset
&& !running_in_test_harness
))
4213 fprintf(stderr
, "exim:%s permission denied\n", debugset
? " debugging" : "");
4218 /* If the real user is not root or the exim uid, the argument for passing
4219 in an open TCP/IP connection for another message is not permitted, nor is
4220 running with the -N option for any delivery action, unless this call to exim is
4221 one that supplied an input message, or we are using a patched exim for
4222 regression testing. */
4224 if (real_uid
!= root_uid
&& real_uid
!= exim_uid
&&
4225 (continue_hostname
!= NULL
||
4227 (queue_interval
>= 0 || daemon_listen
|| msg_action_arg
> 0)
4228 )) && !running_in_test_harness
)
4230 fprintf(stderr
, "exim: Permission denied\n");
4231 return EXIT_FAILURE
;
4234 /* If the caller is not trusted, certain arguments are ignored when running for
4235 real, but are permitted when checking things (-be, -bv, -bt, -bh, -bf, -bF).
4236 Note that authority for performing certain actions on messages is tested in the
4237 queue_action() function. */
4239 if (!trusted_caller
&& !checking
)
4241 sender_host_name
= sender_host_address
= interface_address
=
4242 sender_ident
= received_protocol
= NULL
;
4243 sender_host_port
= interface_port
= 0;
4244 sender_host_authenticated
= authenticated_sender
= authenticated_id
= NULL
;
4247 /* If a sender host address is set, extract the optional port number off the
4248 end of it and check its syntax. Do the same thing for the interface address.
4249 Exim exits if the syntax is bad. */
4253 if (sender_host_address
!= NULL
)
4254 sender_host_port
= check_port(sender_host_address
);
4255 if (interface_address
!= NULL
)
4256 interface_port
= check_port(interface_address
);
4259 /* If the caller is trusted, then they can use -G to suppress_local_fixups. */
4264 suppress_local_fixups
= suppress_local_fixups_default
= TRUE
;
4265 DEBUG(D_acl
) debug_printf("suppress_local_fixups forced on by -G\n");
4269 fprintf(stderr
, "exim: permission denied (-G requires a trusted user)\n");
4270 return EXIT_FAILURE
;
4274 /* If an SMTP message is being received check to see if the standard input is a
4275 TCP/IP socket. If it is, we assume that Exim was called from inetd if the
4276 caller is root or the Exim user, or if the port is a privileged one. Otherwise,
4281 union sockaddr_46 inetd_sock
;
4282 EXIM_SOCKLEN_T size
= sizeof(inetd_sock
);
4283 if (getpeername(0, (struct sockaddr
*)(&inetd_sock
), &size
) == 0)
4285 int family
= ((struct sockaddr
*)(&inetd_sock
))->sa_family
;
4286 if (family
== AF_INET
|| family
== AF_INET6
)
4288 union sockaddr_46 interface_sock
;
4289 size
= sizeof(interface_sock
);
4291 if (getsockname(0, (struct sockaddr
*)(&interface_sock
), &size
) == 0)
4292 interface_address
= host_ntoa(-1, &interface_sock
, NULL
,
4295 if (host_is_tls_on_connect_port(interface_port
)) tls_in
.on_connect
= TRUE
;
4297 if (real_uid
== root_uid
|| real_uid
== exim_uid
|| interface_port
< 1024)
4300 sender_host_address
= host_ntoa(-1, (struct sockaddr
*)(&inetd_sock
),
4301 NULL
, &sender_host_port
);
4302 if (mua_wrapper
) log_write(0, LOG_MAIN
|LOG_PANIC_DIE
, "Input from "
4303 "inetd is not supported when mua_wrapper is set");
4308 "exim: Permission denied (unprivileged user, unprivileged port)\n");
4309 return EXIT_FAILURE
;
4315 /* If the load average is going to be needed while receiving a message, get it
4316 now for those OS that require the first call to os_getloadavg() to be done as
4317 root. There will be further calls later for each message received. */
4319 #ifdef LOAD_AVG_NEEDS_ROOT
4320 if (receiving_message
&&
4321 (queue_only_load
>= 0 ||
4322 (is_inetd
&& smtp_load_reserve
>= 0)
4325 load_average
= OS_GETLOADAVG();
4329 /* The queue_only configuration option can be overridden by -odx on the command
4330 line, except that if queue_only_override is false, queue_only cannot be unset
4331 from the command line. */
4333 if (queue_only_set
&& (queue_only_override
|| arg_queue_only
))
4334 queue_only
= arg_queue_only
;
4336 /* The receive_timeout and smtp_receive_timeout options can be overridden by
4339 if (arg_receive_timeout
>= 0) receive_timeout
= arg_receive_timeout
;
4340 if (arg_smtp_receive_timeout
>= 0)
4341 smtp_receive_timeout
= arg_smtp_receive_timeout
;
4343 /* If Exim was started with root privilege, unless we have already removed the
4344 root privilege above as a result of -C, -D, -be, -bf or -bF, remove it now
4345 except when starting the daemon or doing some kind of delivery or address
4346 testing (-bt). These are the only cases when root need to be retained. We run
4347 as exim for -bv and -bh. However, if deliver_drop_privilege is set, root is
4348 retained only for starting the daemon. We always do the initgroups() in this
4349 situation (controlled by the TRUE below), in order to be as close as possible
4350 to the state Exim usually runs in. */
4352 if (!unprivileged
&& /* originally had root AND */
4353 !removed_privilege
&& /* still got root AND */
4354 !daemon_listen
&& /* not starting the daemon */
4355 queue_interval
<= 0 && /* (either kind of daemon) */
4357 deliver_drop_privilege
|| /* requested unprivileged */
4359 queue_interval
< 0 && /* not running the queue */
4360 (msg_action_arg
< 0 || /* and */
4361 msg_action
!= MSG_DELIVER
) && /* not delivering and */
4362 (!checking
|| !address_test_mode
) /* not address checking */
4364 exim_setugid(exim_uid
, exim_gid
, TRUE
, US
"privilege not needed");
4366 /* When we are retaining a privileged uid, we still change to the exim gid. */
4371 rv
= setgid(exim_gid
);
4372 /* Impact of failure is that some stuff might end up with an incorrect group.
4373 We track this for failures from root, since any attempt to change privilege
4374 by root should succeed and failures should be examined. For non-root,
4375 there's no security risk. For me, it's { exim -bV } on a just-built binary,
4376 no need to complain then. */
4378 if (!(unprivileged
|| removed_privilege
))
4381 "exim: changing group failed: %s\n", strerror(errno
));
4385 DEBUG(D_any
) debug_printf("changing group to %ld failed: %s\n",
4386 (long int)exim_gid
, strerror(errno
));
4389 /* Handle a request to scan a file for malware */
4390 if (malware_test_file
)
4392 #ifdef WITH_CONTENT_SCAN
4394 set_process_info("scanning file for malware");
4395 result
= malware_in_file(malware_test_file
);
4398 printf("No malware found.\n");
4403 printf("Malware lookup returned non-okay/fail: %d\n", result
);
4407 printf("Malware found: %s\n", malware_name
);
4409 printf("Malware scan detected malware of unknown name.\n");
4411 printf("Malware scanning not enabled at compile time.\n");
4416 /* Handle a request to list the delivery queue */
4420 set_process_info("listing the queue");
4421 queue_list(list_queue_option
, argv
+ recipients_arg
, argc
- recipients_arg
);
4425 /* Handle a request to count the delivery queue */
4429 set_process_info("counting the queue");
4434 /* Handle actions on specific messages, except for the force delivery and
4435 message load actions, which are done below. Some actions take a whole list of
4436 message ids, which are known to continue up to the end of the arguments. Others
4437 take a single message id and then operate on the recipients list. */
4439 if (msg_action_arg
> 0 && msg_action
!= MSG_DELIVER
&& msg_action
!= MSG_LOAD
)
4441 int yield
= EXIT_SUCCESS
;
4442 set_process_info("acting on specified messages");
4444 if (!one_msg_action
)
4446 for (i
= msg_action_arg
; i
< argc
; i
++)
4447 if (!queue_action(argv
[i
], msg_action
, NULL
, 0, 0))
4448 yield
= EXIT_FAILURE
;
4451 else if (!queue_action(argv
[msg_action_arg
], msg_action
, argv
, argc
,
4452 recipients_arg
)) yield
= EXIT_FAILURE
;
4456 /* We used to set up here to skip reading the ACL section, on
4457 (msg_action_arg > 0 || (queue_interval == 0 && !daemon_listen)
4458 Now, since the intro of the ${acl } expansion, ACL definitions may be
4459 needed in transports so we lost the optimisation. */
4463 /* The configuration data will have been read into POOL_PERM because we won't
4464 ever want to reset back past it. Change the current pool to POOL_MAIN. In fact,
4465 this is just a bit of pedantic tidiness. It wouldn't really matter if the
4466 configuration were read into POOL_MAIN, because we don't do any resets till
4467 later on. However, it seems right, and it does ensure that both pools get used.
4470 store_pool
= POOL_MAIN
;
4472 /* Handle the -brt option. This is for checking out retry configurations.
4473 The next three arguments are a domain name or a complete address, and
4474 optionally two error numbers. All it does is to call the function that
4475 scans the retry configuration data. */
4477 if (test_retry_arg
>= 0)
4479 retry_config
*yield
;
4480 int basic_errno
= 0;
4484 if (test_retry_arg
>= argc
)
4486 printf("-brt needs a domain or address argument\n");
4487 exim_exit(EXIT_FAILURE
, US
"main");
4489 s1
= argv
[test_retry_arg
++];
4492 /* If the first argument contains no @ and no . it might be a local user
4493 or it might be a single-component name. Treat as a domain. */
4495 if (Ustrchr(s1
, '@') == NULL
&& Ustrchr(s1
, '.') == NULL
)
4497 printf("Warning: \"%s\" contains no '@' and no '.' characters. It is "
4498 "being \ntreated as a one-component domain, not as a local part.\n\n",
4502 /* There may be an optional second domain arg. */
4504 if (test_retry_arg
< argc
&& Ustrchr(argv
[test_retry_arg
], '.') != NULL
)
4505 s2
= argv
[test_retry_arg
++];
4507 /* The final arg is an error name */
4509 if (test_retry_arg
< argc
)
4511 uschar
*ss
= argv
[test_retry_arg
];
4513 readconf_retry_error(ss
, ss
+ Ustrlen(ss
), &basic_errno
, &more_errno
);
4516 printf("%s\n", CS error
);
4517 return EXIT_FAILURE
;
4520 /* For the {MAIL,RCPT,DATA}_4xx errors, a value of 255 means "any", and a
4521 code > 100 as an error is for matching codes to the decade. Turn them into
4522 a real error code, off the decade. */
4524 if (basic_errno
== ERRNO_MAIL4XX
||
4525 basic_errno
== ERRNO_RCPT4XX
||
4526 basic_errno
== ERRNO_DATA4XX
)
4528 int code
= (more_errno
>> 8) & 255;
4530 more_errno
= (more_errno
& 0xffff00ff) | (21 << 8);
4531 else if (code
> 100)
4532 more_errno
= (more_errno
& 0xffff00ff) | ((code
- 96) << 8);
4536 if (!(yield
= retry_find_config(s1
, s2
, basic_errno
, more_errno
)))
4537 printf("No retry information found\n");
4541 more_errno
= yield
->more_errno
;
4542 printf("Retry rule: %s ", yield
->pattern
);
4544 if (yield
->basic_errno
== ERRNO_EXIMQUOTA
)
4546 printf("quota%s%s ",
4547 (more_errno
> 0)? "_" : "",
4548 (more_errno
> 0)? readconf_printtime(more_errno
) : US
"");
4550 else if (yield
->basic_errno
== ECONNREFUSED
)
4552 printf("refused%s%s ",
4553 (more_errno
> 0)? "_" : "",
4554 (more_errno
== 'M')? "MX" :
4555 (more_errno
== 'A')? "A" : "");
4557 else if (yield
->basic_errno
== ETIMEDOUT
)
4560 if ((more_errno
& RTEF_CTOUT
) != 0) printf("_connect");
4562 if (more_errno
!= 0) printf("_%s",
4563 (more_errno
== 'M')? "MX" : "A");
4566 else if (yield
->basic_errno
== ERRNO_AUTHFAIL
)
4567 printf("auth_failed ");
4570 for (r
= yield
->rules
; r
; r
= r
->next
)
4572 printf("%c,%s", r
->rule
, readconf_printtime(r
->timeout
)); /* Do not */
4573 printf(",%s", readconf_printtime(r
->p1
)); /* amalgamate */
4579 printf(",%d.", x
/1000);
4593 exim_exit(EXIT_SUCCESS
, US
"main");
4596 /* Handle a request to list one or more configuration options */
4597 /* If -n was set, we suppress some information */
4601 set_process_info("listing variables");
4602 if (recipients_arg
>= argc
) readconf_print(US
"all", NULL
, flag_n
);
4603 else for (i
= recipients_arg
; i
< argc
; i
++)
4606 (Ustrcmp(argv
[i
], "router") == 0 ||
4607 Ustrcmp(argv
[i
], "transport") == 0 ||
4608 Ustrcmp(argv
[i
], "authenticator") == 0 ||
4609 Ustrcmp(argv
[i
], "macro") == 0 ||
4610 Ustrcmp(argv
[i
], "environment") == 0))
4612 readconf_print(argv
[i
+1], argv
[i
], flag_n
);
4615 else readconf_print(argv
[i
], NULL
, flag_n
);
4617 exim_exit(EXIT_SUCCESS
, US
"main");
4622 set_process_info("listing config");
4623 readconf_print(US
"config", NULL
, flag_n
);
4624 exim_exit(EXIT_SUCCESS
, US
"main");
4628 /* Initialise subsystems as required */
4629 #ifndef DISABLE_DKIM
4635 /* Handle a request to deliver one or more messages that are already on the
4636 queue. Values of msg_action other than MSG_DELIVER and MSG_LOAD are dealt with
4637 above. MSG_LOAD is handled with -be (which is the only time it applies) below.
4639 Delivery of specific messages is typically used for a small number when
4640 prodding by hand (when the option forced_delivery will be set) or when
4641 re-execing to regain root privilege. Each message delivery must happen in a
4642 separate process, so we fork a process for each one, and run them sequentially
4643 so that debugging output doesn't get intertwined, and to avoid spawning too
4644 many processes if a long list is given. However, don't fork for the last one;
4645 this saves a process in the common case when Exim is called to deliver just one
4648 if (msg_action_arg
> 0 && msg_action
!= MSG_LOAD
)
4650 if (prod_requires_admin
&& !admin_user
)
4652 fprintf(stderr
, "exim: Permission denied\n");
4653 exim_exit(EXIT_FAILURE
, US
"main");
4655 set_process_info("delivering specified messages");
4656 if (deliver_give_up
) forced_delivery
= deliver_force_thaw
= TRUE
;
4657 for (i
= msg_action_arg
; i
< argc
; i
++)
4662 (void)deliver_message(argv
[i
], forced_delivery
, deliver_give_up
);
4663 else if ((pid
= fork()) == 0)
4665 (void)deliver_message(argv
[i
], forced_delivery
, deliver_give_up
);
4666 _exit(EXIT_SUCCESS
);
4670 fprintf(stderr
, "failed to fork delivery process for %s: %s\n", argv
[i
],
4672 exim_exit(EXIT_FAILURE
, US
"main");
4676 exim_exit(EXIT_SUCCESS
, US
"main");
4680 /* If only a single queue run is requested, without SMTP listening, we can just
4681 turn into a queue runner, with an optional starting message id. */
4683 if (queue_interval
== 0 && !daemon_listen
)
4685 DEBUG(D_queue_run
) debug_printf("Single queue run%s%s%s%s\n",
4686 (start_queue_run_id
== NULL
)? US
"" : US
" starting at ",
4687 (start_queue_run_id
== NULL
)? US
"" : start_queue_run_id
,
4688 (stop_queue_run_id
== NULL
)? US
"" : US
" stopping at ",
4689 (stop_queue_run_id
== NULL
)? US
"" : stop_queue_run_id
);
4691 set_process_info("running the '%s' queue (single queue run)", queue_name
);
4693 set_process_info("running the queue (single queue run)");
4694 queue_run(start_queue_run_id
, stop_queue_run_id
, FALSE
);
4695 exim_exit(EXIT_SUCCESS
, US
"main");
4699 /* Find the login name of the real user running this process. This is always
4700 needed when receiving a message, because it is written into the spool file. It
4701 may also be used to construct a from: or a sender: header, and in this case we
4702 need the user's full name as well, so save a copy of it, checked for RFC822
4703 syntax and munged if necessary, if it hasn't previously been set by the -F
4704 argument. We may try to get the passwd entry more than once, in case NIS or
4705 other delays are in evidence. Save the home directory for use in filter testing
4710 if ((pw
= getpwuid(real_uid
)) != NULL
)
4712 originator_login
= string_copy(US pw
->pw_name
);
4713 originator_home
= string_copy(US pw
->pw_dir
);
4715 /* If user name has not been set by -F, set it from the passwd entry
4716 unless -f has been used to set the sender address by a trusted user. */
4718 if (!originator_name
)
4720 if (!sender_address
|| (!trusted_caller
&& filter_test
== FTEST_NONE
))
4722 uschar
*name
= US pw
->pw_gecos
;
4723 uschar
*amp
= Ustrchr(name
, '&');
4726 /* Most Unix specify that a '&' character in the gecos field is
4727 replaced by a copy of the login name, and some even specify that
4728 the first character should be upper cased, so that's what we do. */
4733 string_format(buffer
, sizeof(buffer
), "%.*s%n%s%s",
4734 (int)(amp
- name
), name
, &loffset
, originator_login
, amp
+ 1);
4735 buffer
[loffset
] = toupper(buffer
[loffset
]);
4739 /* If a pattern for matching the gecos field was supplied, apply
4740 it and then expand the name string. */
4742 if (gecos_pattern
&& gecos_name
)
4745 re
= regex_must_compile(gecos_pattern
, FALSE
, TRUE
); /* Use malloc */
4747 if (regex_match_and_setup(re
, name
, 0, -1))
4749 uschar
*new_name
= expand_string(gecos_name
);
4753 DEBUG(D_receive
) debug_printf("user name \"%s\" extracted from "
4754 "gecos field \"%s\"\n", new_name
, name
);
4757 else DEBUG(D_receive
) debug_printf("failed to expand gecos_name string "
4758 "\"%s\": %s\n", gecos_name
, expand_string_message
);
4760 else DEBUG(D_receive
) debug_printf("gecos_pattern \"%s\" did not match "
4761 "gecos field \"%s\"\n", gecos_pattern
, name
);
4762 store_free((void *)re
);
4764 originator_name
= string_copy(name
);
4767 /* A trusted caller has used -f but not -F */
4769 else originator_name
= US
"";
4772 /* Break the retry loop */
4777 if (++i
> finduser_retries
) break;
4781 /* If we cannot get a user login, log the incident and give up, unless the
4782 configuration specifies something to use. When running in the test harness,
4783 any setting of unknown_login overrides the actual name. */
4785 if (originator_login
== NULL
|| running_in_test_harness
)
4787 if (unknown_login
!= NULL
)
4789 originator_login
= expand_string(unknown_login
);
4790 if (originator_name
== NULL
&& unknown_username
!= NULL
)
4791 originator_name
= expand_string(unknown_username
);
4792 if (originator_name
== NULL
) originator_name
= US
"";
4794 if (originator_login
== NULL
)
4795 log_write(0, LOG_MAIN
|LOG_PANIC_DIE
, "Failed to get user name for uid %d",
4799 /* Ensure that the user name is in a suitable form for use as a "phrase" in an
4802 originator_name
= string_copy(parse_fix_phrase(originator_name
,
4803 Ustrlen(originator_name
), big_buffer
, big_buffer_size
));
4805 /* If a message is created by this call of Exim, the uid/gid of its originator
4806 are those of the caller. These values are overridden if an existing message is
4807 read in from the spool. */
4809 originator_uid
= real_uid
;
4810 originator_gid
= real_gid
;
4812 DEBUG(D_receive
) debug_printf("originator: uid=%d gid=%d login=%s name=%s\n",
4813 (int)originator_uid
, (int)originator_gid
, originator_login
, originator_name
);
4815 /* Run in daemon and/or queue-running mode. The function daemon_go() never
4816 returns. We leave this till here so that the originator_ fields are available
4817 for incoming messages via the daemon. The daemon cannot be run in mua_wrapper
4820 if (daemon_listen
|| inetd_wait_mode
|| queue_interval
> 0)
4824 fprintf(stderr
, "Daemon cannot be run when mua_wrapper is set\n");
4825 log_write(0, LOG_MAIN
|LOG_PANIC_DIE
, "Daemon cannot be run when "
4826 "mua_wrapper is set");
4831 /* If the sender ident has not been set (by a trusted caller) set it to
4832 the caller. This will get overwritten below for an inetd call. If a trusted
4833 caller has set it empty, unset it. */
4835 if (sender_ident
== NULL
) sender_ident
= originator_login
;
4836 else if (sender_ident
[0] == 0) sender_ident
= NULL
;
4838 /* Handle the -brw option, which is for checking out rewriting rules. Cause log
4839 writes (on errors) to go to stderr instead. Can't do this earlier, as want the
4840 originator_* variables set. */
4842 if (test_rewrite_arg
>= 0)
4844 really_exim
= FALSE
;
4845 if (test_rewrite_arg
>= argc
)
4847 printf("-brw needs an address argument\n");
4848 exim_exit(EXIT_FAILURE
, US
"main");
4850 rewrite_test(argv
[test_rewrite_arg
]);
4851 exim_exit(EXIT_SUCCESS
, US
"main");
4854 /* A locally-supplied message is considered to be coming from a local user
4855 unless a trusted caller supplies a sender address with -f, or is passing in the
4856 message via SMTP (inetd invocation or otherwise). */
4858 if ((sender_address
== NULL
&& !smtp_input
) ||
4859 (!trusted_caller
&& filter_test
== FTEST_NONE
))
4861 sender_local
= TRUE
;
4863 /* A trusted caller can supply authenticated_sender and authenticated_id
4864 via -oMas and -oMai and if so, they will already be set. Otherwise, force
4865 defaults except when host checking. */
4867 if (authenticated_sender
== NULL
&& !host_checking
)
4868 authenticated_sender
= string_sprintf("%s@%s", originator_login
,
4869 qualify_domain_sender
);
4870 if (authenticated_id
== NULL
&& !host_checking
)
4871 authenticated_id
= originator_login
;
4874 /* Trusted callers are always permitted to specify the sender address.
4875 Untrusted callers may specify it if it matches untrusted_set_sender, or if what
4876 is specified is the empty address. However, if a trusted caller does not
4877 specify a sender address for SMTP input, we leave sender_address unset. This
4878 causes the MAIL commands to be honoured. */
4880 if ((!smtp_input
&& sender_address
== NULL
) ||
4881 !receive_check_set_sender(sender_address
))
4883 /* Either the caller is not permitted to set a general sender, or this is
4884 non-SMTP input and the trusted caller has not set a sender. If there is no
4885 sender, or if a sender other than <> is set, override with the originator's
4886 login (which will get qualified below), except when checking things. */
4888 if (sender_address
== NULL
/* No sender_address set */
4890 (sender_address
[0] != 0 && /* Non-empty sender address, AND */
4891 !checking
)) /* Not running tests, including filter tests */
4893 sender_address
= originator_login
;
4894 sender_address_forced
= FALSE
;
4895 sender_address_domain
= 0;
4899 /* Remember whether an untrusted caller set the sender address */
4901 sender_set_untrusted
= sender_address
!= originator_login
&& !trusted_caller
;
4903 /* Ensure that the sender address is fully qualified unless it is the empty
4904 address, which indicates an error message, or doesn't exist (root caller, smtp
4905 interface, no -f argument). */
4907 if (sender_address
!= NULL
&& sender_address
[0] != 0 &&
4908 sender_address_domain
== 0)
4909 sender_address
= string_sprintf("%s@%s", local_part_quote(sender_address
),
4910 qualify_domain_sender
);
4912 DEBUG(D_receive
) debug_printf("sender address = %s\n", sender_address
);
4914 /* Handle a request to verify a list of addresses, or test them for delivery.
4915 This must follow the setting of the sender address, since routers can be
4916 predicated upon the sender. If no arguments are given, read addresses from
4917 stdin. Set debug_level to at least D_v to get full output for address testing.
4920 if (verify_address_mode
|| address_test_mode
)
4923 int flags
= vopt_qualify
;
4925 if (verify_address_mode
)
4927 if (!verify_as_sender
) flags
|= vopt_is_recipient
;
4928 DEBUG(D_verify
) debug_print_ids(US
"Verifying:");
4933 flags
|= vopt_is_recipient
;
4934 debug_selector
|= D_v
;
4935 debug_file
= stderr
;
4936 debug_fd
= fileno(debug_file
);
4937 DEBUG(D_verify
) debug_print_ids(US
"Address testing:");
4940 if (recipients_arg
< argc
)
4942 while (recipients_arg
< argc
)
4944 uschar
*s
= argv
[recipients_arg
++];
4947 BOOL finished
= FALSE
;
4948 uschar
*ss
= parse_find_address_end(s
, FALSE
);
4949 if (*ss
== ',') *ss
= 0; else finished
= TRUE
;
4950 test_address(s
, flags
, &exit_value
);
4953 while (*(++s
) != 0 && (*s
== ',' || isspace(*s
)));
4960 uschar
*s
= get_stdinput(NULL
, NULL
);
4961 if (s
== NULL
) break;
4962 test_address(s
, flags
, &exit_value
);
4966 exim_exit(exit_value
, US
"main");
4969 /* Handle expansion checking. Either expand items on the command line, or read
4970 from stdin if there aren't any. If -Mset was specified, load the message so
4971 that its variables can be used, but restrict this facility to admin users.
4972 Otherwise, if -bem was used, read a message from stdin. */
4976 dns_init(FALSE
, FALSE
, FALSE
);
4977 if (msg_action_arg
> 0 && msg_action
== MSG_LOAD
)
4979 uschar spoolname
[256]; /* Not big_buffer; used in spool_read_header() */
4982 fprintf(stderr
, "exim: permission denied\n");
4985 message_id
= argv
[msg_action_arg
];
4986 (void)string_format(spoolname
, sizeof(spoolname
), "%s-H", message_id
);
4987 if ((deliver_datafile
= spool_open_datafile(message_id
)) < 0)
4988 printf ("Failed to load message datafile %s\n", message_id
);
4989 if (spool_read_header(spoolname
, TRUE
, FALSE
) != spool_read_OK
)
4990 printf ("Failed to load message %s\n", message_id
);
4993 /* Read a test message from a file. We fudge it up to be on stdin, saving
4994 stdin itself for later reading of expansion strings. */
4996 else if (expansion_test_message
!= NULL
)
4998 int save_stdin
= dup(0);
4999 int fd
= Uopen(expansion_test_message
, O_RDONLY
, 0);
5002 fprintf(stderr
, "exim: failed to open %s: %s\n", expansion_test_message
,
5004 return EXIT_FAILURE
;
5007 filter_test
= FTEST_USER
; /* Fudge to make it look like filter test */
5008 message_ended
= END_NOTENDED
;
5009 read_message_body(receive_msg(extract_recipients
));
5010 message_linecount
+= body_linecount
;
5011 (void)dup2(save_stdin
, 0);
5012 (void)close(save_stdin
);
5013 clearerr(stdin
); /* Required by Darwin */
5016 /* Allow $recipients for this testing */
5018 enable_dollar_recipients
= TRUE
;
5020 /* Expand command line items */
5022 if (recipients_arg
< argc
)
5024 while (recipients_arg
< argc
)
5026 uschar
*s
= argv
[recipients_arg
++];
5027 uschar
*ss
= expand_string(s
);
5028 if (ss
== NULL
) printf ("Failed: %s\n", expand_string_message
);
5029 else printf("%s\n", CS ss
);
5037 char *(*fn_readline
)(const char *) = NULL
;
5038 void (*fn_addhist
)(const char *) = NULL
;
5041 void *dlhandle
= set_readline(&fn_readline
, &fn_addhist
);
5047 uschar
*source
= get_stdinput(fn_readline
, fn_addhist
);
5048 if (source
== NULL
) break;
5049 ss
= expand_string(source
);
5051 printf ("Failed: %s\n", expand_string_message
);
5052 else printf("%s\n", CS ss
);
5056 if (dlhandle
!= NULL
) dlclose(dlhandle
);
5060 /* The data file will be open after -Mset */
5062 if (deliver_datafile
>= 0)
5064 (void)close(deliver_datafile
);
5065 deliver_datafile
= -1;
5068 exim_exit(EXIT_SUCCESS
, US
"main");
5072 /* The active host name is normally the primary host name, but it can be varied
5073 for hosts that want to play several parts at once. We need to ensure that it is
5074 set for host checking, and for receiving messages. */
5076 smtp_active_hostname
= primary_hostname
;
5077 if (raw_active_hostname
!= NULL
)
5079 uschar
*nah
= expand_string(raw_active_hostname
);
5082 if (!expand_string_forcedfail
)
5083 log_write(0, LOG_MAIN
|LOG_PANIC_DIE
, "failed to expand \"%s\" "
5084 "(smtp_active_hostname): %s", raw_active_hostname
,
5085 expand_string_message
);
5087 else if (nah
[0] != 0) smtp_active_hostname
= nah
;
5090 /* Handle host checking: this facility mocks up an incoming SMTP call from a
5091 given IP address so that the blocking and relay configuration can be tested.
5092 Unless a sender_ident was set by -oMt, we discard it (the default is the
5093 caller's login name). An RFC 1413 call is made only if we are running in the
5094 test harness and an incoming interface and both ports are specified, because
5095 there is no TCP/IP call to find the ident for. */
5102 if (!sender_ident_set
)
5104 sender_ident
= NULL
;
5105 if (running_in_test_harness
&& sender_host_port
!= 0 &&
5106 interface_address
!= NULL
&& interface_port
!= 0)
5107 verify_get_ident(1413);
5110 /* In case the given address is a non-canonical IPv6 address, canonicalize
5111 it. The code works for both IPv4 and IPv6, as it happens. */
5113 size
= host_aton(sender_host_address
, x
);
5114 sender_host_address
= store_get(48); /* large enough for full IPv6 */
5115 (void)host_nmtoa(size
, x
, -1, sender_host_address
, ':');
5117 /* Now set up for testing */
5119 host_build_sender_fullhost();
5123 sender_local
= FALSE
;
5124 sender_host_notsocket
= TRUE
;
5125 debug_file
= stderr
;
5126 debug_fd
= fileno(debug_file
);
5127 fprintf(stdout
, "\n**** SMTP testing session as if from host %s\n"
5128 "**** but without any ident (RFC 1413) callback.\n"
5129 "**** This is not for real!\n\n",
5130 sender_host_address
);
5132 memset(sender_host_cache
, 0, sizeof(sender_host_cache
));
5133 if (verify_check_host(&hosts_connection_nolog
) == OK
)
5134 BIT_CLEAR(log_selector
, log_selector_size
, Li_smtp_connection
);
5135 log_write(L_smtp_connection
, LOG_MAIN
, "%s", smtp_get_connection_info());
5137 /* NOTE: We do *not* call smtp_log_no_mail() if smtp_start_session() fails,
5138 because a log line has already been written for all its failure exists
5139 (usually "connection refused: <reason>") and writing another one is
5140 unnecessary clutter. */
5142 if (smtp_start_session())
5144 for (reset_point
= store_get(0); ; store_reset(reset_point
))
5146 if (smtp_setup_msg() <= 0) break;
5147 if (!receive_msg(FALSE
)) break;
5149 return_path
= sender_address
= NULL
;
5150 dnslist_domain
= dnslist_matched
= NULL
;
5151 #ifndef DISABLE_DKIM
5152 dkim_cur_signer
= NULL
;
5155 deliver_localpart_orig
= NULL
;
5156 deliver_domain_orig
= NULL
;
5157 callout_address
= sending_ip_address
= NULL
;
5158 sender_rate
= sender_rate_limit
= sender_rate_period
= NULL
;
5162 exim_exit(EXIT_SUCCESS
, US
"main");
5166 /* Arrange for message reception if recipients or SMTP were specified;
5167 otherwise complain unless a version print (-bV) happened or this is a filter
5168 verification test or info dump.
5169 In the former case, show the configuration file name. */
5171 if (recipients_arg
>= argc
&& !extract_recipients
&& !smtp_input
)
5173 if (version_printed
)
5175 printf("Configuration file is %s\n", config_main_filename
);
5176 return EXIT_SUCCESS
;
5179 if (info_flag
!= CMDINFO_NONE
)
5181 show_exim_information(info_flag
, info_stdout
? stdout
: stderr
);
5182 return info_stdout
? EXIT_SUCCESS
: EXIT_FAILURE
;
5185 if (filter_test
== FTEST_NONE
)
5186 exim_usage(called_as
);
5190 /* If mua_wrapper is set, Exim is being used to turn an MUA that submits on the
5191 standard input into an MUA that submits to a smarthost over TCP/IP. We know
5192 that we are not called from inetd, because that is rejected above. The
5193 following configuration settings are forced here:
5195 (1) Synchronous delivery (-odi)
5196 (2) Errors to stderr (-oep == -oeq)
5197 (3) No parallel remote delivery
5198 (4) Unprivileged delivery
5200 We don't force overall queueing options because there are several of them;
5201 instead, queueing is avoided below when mua_wrapper is set. However, we do need
5202 to override any SMTP queueing. */
5206 synchronous_delivery
= TRUE
;
5207 arg_error_handling
= ERRORS_STDERR
;
5208 remote_max_parallel
= 1;
5209 deliver_drop_privilege
= TRUE
;
5211 queue_smtp_domains
= NULL
;
5213 message_utf8_downconvert
= -1; /* convert-if-needed */
5218 /* Prepare to accept one or more new messages on the standard input. When a
5219 message has been read, its id is returned in message_id[]. If doing immediate
5220 delivery, we fork a delivery process for each received message, except for the
5221 last one, where we can save a process switch.
5223 It is only in non-smtp mode that error_handling is allowed to be changed from
5224 its default of ERRORS_SENDER by argument. (Idle thought: are any of the
5225 sendmail error modes other than -oem ever actually used? Later: yes.) */
5227 if (!smtp_input
) error_handling
= arg_error_handling
;
5229 /* If this is an inetd call, ensure that stderr is closed to prevent panic
5230 logging being sent down the socket and make an identd call to get the
5235 (void)fclose(stderr
);
5236 exim_nullstd(); /* Re-open to /dev/null */
5237 verify_get_ident(IDENT_PORT
);
5238 host_build_sender_fullhost();
5239 set_process_info("handling incoming connection from %s via inetd",
5243 /* If the sender host address has been set, build sender_fullhost if it hasn't
5244 already been done (which it will have been for inetd). This caters for the
5245 case when it is forced by -oMa. However, we must flag that it isn't a socket,
5246 so that the test for IP options is skipped for -bs input. */
5248 if (sender_host_address
!= NULL
&& sender_fullhost
== NULL
)
5250 host_build_sender_fullhost();
5251 set_process_info("handling incoming connection from %s via -oMa",
5253 sender_host_notsocket
= TRUE
;
5256 /* Otherwise, set the sender host as unknown except for inetd calls. This
5257 prevents host checking in the case of -bs not from inetd and also for -bS. */
5259 else if (!is_inetd
) sender_host_unknown
= TRUE
;
5261 /* If stdout does not exist, then dup stdin to stdout. This can happen
5262 if exim is started from inetd. In this case fd 0 will be set to the socket,
5263 but fd 1 will not be set. This also happens for passed SMTP channels. */
5265 if (fstat(1, &statbuf
) < 0) (void)dup2(0, 1);
5267 /* Set up the incoming protocol name and the state of the program. Root is
5268 allowed to force received protocol via the -oMr option above. If we have come
5269 via inetd, the process info has already been set up. We don't set
5270 received_protocol here for smtp input, as it varies according to
5271 batch/HELO/EHLO/AUTH/TLS. */
5275 if (!is_inetd
) set_process_info("accepting a local %sSMTP message from <%s>",
5276 smtp_batched_input
? "batched " : "",
5277 (sender_address
!= NULL
)? sender_address
: originator_login
);
5281 int old_pool
= store_pool
;
5282 store_pool
= POOL_PERM
;
5283 if (!received_protocol
)
5284 received_protocol
= string_sprintf("local%s", called_as
);
5285 store_pool
= old_pool
;
5286 set_process_info("accepting a local non-SMTP message from <%s>",
5290 /* Initialize the session_local_queue-only flag (this will be ignored if
5291 mua_wrapper is set) */
5294 session_local_queue_only
= queue_only
;
5296 /* For non-SMTP and for batched SMTP input, check that there is enough space on
5297 the spool if so configured. On failure, we must not attempt to send an error
5298 message! (For interactive SMTP, the check happens at MAIL FROM and an SMTP
5299 error code is given.) */
5301 if ((!smtp_input
|| smtp_batched_input
) && !receive_check_fs(0))
5303 fprintf(stderr
, "exim: insufficient disk space\n");
5304 return EXIT_FAILURE
;
5307 /* If this is smtp input of any kind, real or batched, handle the start of the
5310 NOTE: We do *not* call smtp_log_no_mail() if smtp_start_session() fails,
5311 because a log line has already been written for all its failure exists
5312 (usually "connection refused: <reason>") and writing another one is
5313 unnecessary clutter. */
5319 memset(sender_host_cache
, 0, sizeof(sender_host_cache
));
5320 if (verify_check_host(&hosts_connection_nolog
) == OK
)
5321 BIT_CLEAR(log_selector
, log_selector_size
, Li_smtp_connection
);
5322 log_write(L_smtp_connection
, LOG_MAIN
, "%s", smtp_get_connection_info());
5323 if (!smtp_start_session())
5326 exim_exit(EXIT_SUCCESS
, US
"smtp_start toplevel");
5330 /* Otherwise, set up the input size limit here. */
5334 thismessage_size_limit
= expand_string_integer(message_size_limit
, TRUE
);
5335 if (expand_string_message
)
5336 if (thismessage_size_limit
== -1)
5337 log_write(0, LOG_MAIN
|LOG_PANIC_DIE
, "failed to expand "
5338 "message_size_limit: %s", expand_string_message
);
5340 log_write(0, LOG_MAIN
|LOG_PANIC_DIE
, "invalid value for "
5341 "message_size_limit: %s", expand_string_message
);
5344 /* Loop for several messages when reading SMTP input. If we fork any child
5345 processes, we don't want to wait for them unless synchronous delivery is
5346 requested, so set SIGCHLD to SIG_IGN in that case. This is not necessarily the
5347 same as SIG_DFL, despite the fact that documentation often lists the default as
5348 "ignore". This is a confusing area. This is what I know:
5350 At least on some systems (e.g. Solaris), just setting SIG_IGN causes child
5351 processes that complete simply to go away without ever becoming defunct. You
5352 can't then wait for them - but we don't want to wait for them in the
5353 non-synchronous delivery case. However, this behaviour of SIG_IGN doesn't
5354 happen for all OS (e.g. *BSD is different).
5356 But that's not the end of the story. Some (many? all?) systems have the
5357 SA_NOCLDWAIT option for sigaction(). This requests the behaviour that Solaris
5358 has by default, so it seems that the difference is merely one of default
5359 (compare restarting vs non-restarting signals).
5361 To cover all cases, Exim sets SIG_IGN with SA_NOCLDWAIT here if it can. If not,
5362 it just sets SIG_IGN. To be on the safe side it also calls waitpid() at the end
5363 of the loop below. Paranoia rules.
5365 February 2003: That's *still* not the end of the story. There are now versions
5366 of Linux (where SIG_IGN does work) that are picky. If, having set SIG_IGN, a
5367 process then calls waitpid(), a grumble is written to the system log, because
5368 this is logically inconsistent. In other words, it doesn't like the paranoia.
5369 As a consequence of this, the waitpid() below is now excluded if we are sure
5370 that SIG_IGN works. */
5372 if (!synchronous_delivery
)
5375 struct sigaction act
;
5376 act
.sa_handler
= SIG_IGN
;
5377 sigemptyset(&(act
.sa_mask
));
5378 act
.sa_flags
= SA_NOCLDWAIT
;
5379 sigaction(SIGCHLD
, &act
, NULL
);
5381 signal(SIGCHLD
, SIG_IGN
);
5385 /* Save the current store pool point, for resetting at the start of
5386 each message, and save the real sender address, if any. */
5388 reset_point
= store_get(0);
5389 real_sender_address
= sender_address
;
5391 /* Loop to receive messages; receive_msg() returns TRUE if there are more
5392 messages to be read (SMTP input), or FALSE otherwise (not SMTP, or SMTP channel
5399 /* Handle the SMTP case; call smtp_setup_mst() to deal with the initial SMTP
5400 input and build the recipients list, before calling receive_msg() to read the
5401 message proper. Whatever sender address is given in the SMTP transaction is
5402 often ignored for local senders - we use the actual sender, which is normally
5403 either the underlying user running this process or a -f argument provided by
5404 a trusted caller. It is saved in real_sender_address. The test for whether to
5405 accept the SMTP sender is encapsulated in receive_check_set_sender(). */
5410 if ((rc
= smtp_setup_msg()) > 0)
5412 if (real_sender_address
!= NULL
&&
5413 !receive_check_set_sender(sender_address
))
5415 sender_address
= raw_sender
= real_sender_address
;
5416 sender_address_unrewritten
= NULL
;
5419 /* For batched SMTP, we have to run the acl_not_smtp_start ACL, since it
5420 isn't really SMTP, so no other ACL will run until the acl_not_smtp one at
5421 the very end. The result of the ACL is ignored (as for other non-SMTP
5422 messages). It is run for its potential side effects. */
5424 if (smtp_batched_input
&& acl_not_smtp_start
!= NULL
)
5426 uschar
*user_msg
, *log_msg
;
5427 enable_dollar_recipients
= TRUE
;
5428 (void)acl_check(ACL_WHERE_NOTSMTP_START
, NULL
, acl_not_smtp_start
,
5429 &user_msg
, &log_msg
);
5430 enable_dollar_recipients
= FALSE
;
5433 /* Now get the data for the message */
5435 more
= receive_msg(extract_recipients
);
5436 if (message_id
[0] == 0)
5438 cancel_cutthrough_connection(TRUE
, US
"receive dropped");
5439 if (more
) goto moreloop
;
5440 smtp_log_no_mail(); /* Log no mail if configured */
5441 exim_exit(EXIT_FAILURE
, US
"receive toplevel");
5446 cancel_cutthrough_connection(TRUE
, US
"message setup dropped");
5447 smtp_log_no_mail(); /* Log no mail if configured */
5448 exim_exit(rc
? EXIT_FAILURE
: EXIT_SUCCESS
, US
"msg setup toplevel");
5452 /* In the non-SMTP case, we have all the information from the command
5453 line, but must process it in case it is in the more general RFC822
5454 format, and in any case, to detect syntax errors. Also, it appears that
5455 the use of comma-separated lists as single arguments is common, so we
5456 had better support them. */
5462 int count
= argc
- recipients_arg
;
5463 uschar
**list
= argv
+ recipients_arg
;
5465 /* These options cannot be changed dynamically for non-SMTP messages */
5467 active_local_sender_retain
= local_sender_retain
;
5468 active_local_from_check
= local_from_check
;
5470 /* Save before any rewriting */
5472 raw_sender
= string_copy(sender_address
);
5474 /* Loop for each argument */
5476 for (i
= 0; i
< count
; i
++)
5478 int start
, end
, domain
;
5480 uschar
*s
= list
[i
];
5482 /* Loop for each comma-separated address */
5486 BOOL finished
= FALSE
;
5488 uschar
*ss
= parse_find_address_end(s
, FALSE
);
5490 if (*ss
== ',') *ss
= 0; else finished
= TRUE
;
5492 /* Check max recipients - if -t was used, these aren't recipients */
5494 if (recipients_max
> 0 && ++rcount
> recipients_max
&&
5495 !extract_recipients
)
5496 if (error_handling
== ERRORS_STDERR
)
5498 fprintf(stderr
, "exim: too many recipients\n");
5499 exim_exit(EXIT_FAILURE
, US
"main");
5503 moan_to_sender(ERRMESS_TOOMANYRECIP
, NULL
, NULL
, stdin
, TRUE
)?
5504 errors_sender_rc
: EXIT_FAILURE
;
5508 BOOL b
= allow_utf8_domains
;
5509 allow_utf8_domains
= TRUE
;
5512 parse_extract_address(s
, &errmess
, &start
, &end
, &domain
, FALSE
);
5515 if (string_is_utf8(recipient
))
5516 message_smtputf8
= TRUE
;
5518 allow_utf8_domains
= b
;
5521 if (domain
== 0 && !allow_unqualified_recipient
)
5524 errmess
= US
"unqualified recipient address not allowed";
5527 if (recipient
== NULL
)
5529 if (error_handling
== ERRORS_STDERR
)
5531 fprintf(stderr
, "exim: bad recipient address \"%s\": %s\n",
5532 string_printing(list
[i
]), errmess
);
5533 exim_exit(EXIT_FAILURE
, US
"main");
5539 eblock
.text1
= string_printing(list
[i
]);
5540 eblock
.text2
= errmess
;
5542 moan_to_sender(ERRMESS_BADARGADDRESS
, &eblock
, NULL
, stdin
, TRUE
)?
5543 errors_sender_rc
: EXIT_FAILURE
;
5547 receive_add_recipient(recipient
, -1);
5550 while (*(++s
) != 0 && (*s
== ',' || isspace(*s
)));
5554 /* Show the recipients when debugging */
5559 if (sender_address
!= NULL
) debug_printf("Sender: %s\n", sender_address
);
5560 if (recipients_list
!= NULL
)
5562 debug_printf("Recipients:\n");
5563 for (i
= 0; i
< recipients_count
; i
++)
5564 debug_printf(" %s\n", recipients_list
[i
].address
);
5568 /* Run the acl_not_smtp_start ACL if required. The result of the ACL is
5569 ignored; rejecting here would just add complication, and it can just as
5570 well be done later. Allow $recipients to be visible in the ACL. */
5572 if (acl_not_smtp_start
)
5574 uschar
*user_msg
, *log_msg
;
5575 enable_dollar_recipients
= TRUE
;
5576 (void)acl_check(ACL_WHERE_NOTSMTP_START
, NULL
, acl_not_smtp_start
,
5577 &user_msg
, &log_msg
);
5578 enable_dollar_recipients
= FALSE
;
5581 /* Pause for a while waiting for input. If none received in that time,
5582 close the logfile, if we had one open; then if we wait for a long-running
5583 datasource (months, in one use-case) log rotation will not leave us holding
5586 if (!receive_timeout
)
5588 struct timeval t
= { .tv_sec
= 30*60, .tv_usec
= 0 }; /* 30 minutes */
5591 FD_ZERO(&r
); FD_SET(0, &r
);
5592 if (select(1, &r
, NULL
, NULL
, &t
) == 0) mainlog_close();
5595 /* Read the data for the message. If filter_test is not FTEST_NONE, this
5596 will just read the headers for the message, and not write anything onto the
5599 message_ended
= END_NOTENDED
;
5600 more
= receive_msg(extract_recipients
);
5602 /* more is always FALSE here (not SMTP message) when reading a message
5603 for real; when reading the headers of a message for filter testing,
5604 it is TRUE if the headers were terminated by '.' and FALSE otherwise. */
5606 if (message_id
[0] == 0) exim_exit(EXIT_FAILURE
, US
"main");
5607 } /* Non-SMTP message reception */
5609 /* If this is a filter testing run, there are headers in store, but
5610 no message on the spool. Run the filtering code in testing mode, setting
5611 the domain to the qualify domain and the local part to the current user,
5612 unless they have been set by options. The prefix and suffix are left unset
5613 unless specified. The the return path is set to to the sender unless it has
5614 already been set from a return-path header in the message. */
5616 if (filter_test
!= FTEST_NONE
)
5618 deliver_domain
= (ftest_domain
!= NULL
)?
5619 ftest_domain
: qualify_domain_recipient
;
5620 deliver_domain_orig
= deliver_domain
;
5621 deliver_localpart
= (ftest_localpart
!= NULL
)?
5622 ftest_localpart
: originator_login
;
5623 deliver_localpart_orig
= deliver_localpart
;
5624 deliver_localpart_prefix
= ftest_prefix
;
5625 deliver_localpart_suffix
= ftest_suffix
;
5626 deliver_home
= originator_home
;
5628 if (return_path
== NULL
)
5630 printf("Return-path copied from sender\n");
5631 return_path
= string_copy(sender_address
);
5634 printf("Return-path = %s\n", (return_path
[0] == 0)? US
"<>" : return_path
);
5635 printf("Sender = %s\n", (sender_address
[0] == 0)? US
"<>" : sender_address
);
5637 receive_add_recipient(
5638 string_sprintf("%s%s%s@%s",
5639 (ftest_prefix
== NULL
)? US
"" : ftest_prefix
,
5641 (ftest_suffix
== NULL
)? US
"" : ftest_suffix
,
5642 deliver_domain
), -1);
5644 printf("Recipient = %s\n", recipients_list
[0].address
);
5645 if (ftest_prefix
!= NULL
) printf("Prefix = %s\n", ftest_prefix
);
5646 if (ftest_suffix
!= NULL
) printf("Suffix = %s\n", ftest_suffix
);
5648 if (chdir("/")) /* Get away from wherever the user is running this from */
5650 DEBUG(D_receive
) debug_printf("chdir(\"/\") failed\n");
5651 exim_exit(EXIT_FAILURE
, US
"main");
5654 /* Now we run either a system filter test, or a user filter test, or both.
5655 In the latter case, headers added by the system filter will persist and be
5656 available to the user filter. We need to copy the filter variables
5659 if ((filter_test
& FTEST_SYSTEM
) != 0)
5660 if (!filter_runtest(filter_sfd
, filter_test_sfile
, TRUE
, more
))
5661 exim_exit(EXIT_FAILURE
, US
"main");
5663 memcpy(filter_sn
, filter_n
, sizeof(filter_sn
));
5665 if ((filter_test
& FTEST_USER
) != 0)
5666 if (!filter_runtest(filter_ufd
, filter_test_ufile
, FALSE
, more
))
5667 exim_exit(EXIT_FAILURE
, US
"main");
5669 exim_exit(EXIT_SUCCESS
, US
"main");
5672 /* Else act on the result of message reception. We should not get here unless
5673 message_id[0] is non-zero. If queue_only is set, session_local_queue_only
5674 will be TRUE. If it is not, check on the number of messages received in this
5677 if (!session_local_queue_only
&&
5678 smtp_accept_queue_per_connection
> 0 &&
5679 receive_messagecount
> smtp_accept_queue_per_connection
)
5681 session_local_queue_only
= TRUE
;
5682 queue_only_reason
= 2;
5685 /* Initialize local_queue_only from session_local_queue_only. If it is false,
5686 and queue_only_load is set, check that the load average is below it. If it is
5687 not, set local_queue_only TRUE. If queue_only_load_latch is true (the
5688 default), we put the whole session into queue_only mode. It then remains this
5689 way for any subsequent messages on the same SMTP connection. This is a
5690 deliberate choice; even though the load average may fall, it doesn't seem
5691 right to deliver later messages on the same call when not delivering earlier
5692 ones. However, there are odd cases where this is not wanted, so this can be
5693 changed by setting queue_only_load_latch false. */
5695 local_queue_only
= session_local_queue_only
;
5696 if (!local_queue_only
&& queue_only_load
>= 0)
5698 local_queue_only
= (load_average
= OS_GETLOADAVG()) > queue_only_load
;
5699 if (local_queue_only
)
5701 queue_only_reason
= 3;
5702 if (queue_only_load_latch
) session_local_queue_only
= TRUE
;
5706 /* If running as an MUA wrapper, all queueing options and freezing options
5710 local_queue_only
= queue_only_policy
= deliver_freeze
= FALSE
;
5712 /* Log the queueing here, when it will get a message id attached, but
5713 not if queue_only is set (case 0). Case 1 doesn't happen here (too many
5716 if (local_queue_only
)
5718 cancel_cutthrough_connection(TRUE
, US
"no delivery; queueing");
5719 switch(queue_only_reason
)
5722 log_write(L_delay_delivery
,
5723 LOG_MAIN
, "no immediate delivery: more than %d messages "
5724 "received in one connection", smtp_accept_queue_per_connection
);
5728 log_write(L_delay_delivery
,
5729 LOG_MAIN
, "no immediate delivery: load average %.2f",
5730 (double)load_average
/1000.0);
5735 else if (queue_only_policy
|| deliver_freeze
)
5736 cancel_cutthrough_connection(TRUE
, US
"no delivery; queueing");
5738 /* Else do the delivery unless the ACL or local_scan() called for queue only
5739 or froze the message. Always deliver in a separate process. A fork failure is
5740 not a disaster, as the delivery will eventually happen on a subsequent queue
5741 run. The search cache must be tidied before the fork, as the parent will
5742 do it before exiting. The child will trigger a lookup failure and
5743 thereby defer the delivery if it tries to use (for example) a cached ldap
5744 connection that the parent has called unbind on. */
5751 if ((pid
= fork()) == 0)
5754 close_unwanted(); /* Close unwanted file descriptors and TLS */
5755 exim_nullstd(); /* Ensure std{in,out,err} exist */
5757 /* Re-exec Exim if we need to regain privilege (note: in mua_wrapper
5758 mode, deliver_drop_privilege is forced TRUE). */
5760 if (geteuid() != root_uid
&& !deliver_drop_privilege
&& !unprivileged
)
5762 delivery_re_exec(CEE_EXEC_EXIT
);
5763 /* Control does not return here. */
5766 /* No need to re-exec */
5768 rc
= deliver_message(message_id
, FALSE
, FALSE
);
5770 _exit((!mua_wrapper
|| rc
== DELIVER_MUA_SUCCEEDED
)?
5771 EXIT_SUCCESS
: EXIT_FAILURE
);
5776 cancel_cutthrough_connection(TRUE
, US
"delivery fork failed");
5777 log_write(0, LOG_MAIN
|LOG_PANIC
, "failed to fork automatic delivery "
5778 "process: %s", strerror(errno
));
5782 release_cutthrough_connection(US
"msg passed for delivery");
5784 /* In the parent, wait if synchronous delivery is required. This will
5785 always be the case in MUA wrapper mode. */
5787 if (synchronous_delivery
)
5790 while (wait(&status
) != pid
);
5791 if ((status
& 0x00ff) != 0)
5792 log_write(0, LOG_MAIN
|LOG_PANIC
,
5793 "process %d crashed with signal %d while delivering %s",
5794 (int)pid
, status
& 0x00ff, message_id
);
5795 if (mua_wrapper
&& (status
& 0xffff) != 0) exim_exit(EXIT_FAILURE
, US
"main");
5800 /* The loop will repeat if more is TRUE. If we do not know know that the OS
5801 automatically reaps children (see comments above the loop), clear away any
5802 finished subprocesses here, in case there are lots of messages coming in
5803 from the same source. */
5805 #ifndef SIG_IGN_WORKS
5806 while (waitpid(-1, NULL
, WNOHANG
) > 0);
5810 return_path
= sender_address
= NULL
;
5811 authenticated_sender
= NULL
;
5812 deliver_localpart_orig
= NULL
;
5813 deliver_domain_orig
= NULL
;
5814 deliver_host
= deliver_host_address
= NULL
;
5815 dnslist_domain
= dnslist_matched
= NULL
;
5816 #ifdef WITH_CONTENT_SCAN
5817 malware_name
= NULL
;
5819 callout_address
= NULL
;
5820 sending_ip_address
= NULL
;
5822 { int i
; for(i
=0; i
<REGEX_VARS
; i
++) regex_vars
[i
] = NULL
; }
5824 store_reset(reset_point
);
5827 exim_exit(EXIT_SUCCESS
, US
"main"); /* Never returns */
5828 return 0; /* To stop compiler warning */