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. */
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 fd
= Uopen(process_log_path
, O_APPEND
|O_WRONLY
, LOG_MODE
);
218 /* If we are already running as the Exim user, try to create it in the
219 current process (assuming spool_directory exists). Otherwise, if we are
220 root, do the creation in an exim:exim subprocess. */
222 int euid
= geteuid();
223 if (euid
== exim_uid
)
224 fd
= Uopen(process_log_path
, O_CREAT
|O_APPEND
|O_WRONLY
, LOG_MODE
);
225 else if (euid
== root_uid
)
226 fd
= log_create_as_exim(process_log_path
);
229 /* If we are neither exim nor root, or if we failed to create the log file,
230 give up. There is not much useful we can do with errors, since we don't want
231 to disrupt whatever is going on outside the signal handler. */
235 (void)write(fd
, process_info
, process_info_len
);
241 /*************************************************
243 *************************************************/
245 /* This handler is enabled most of the time that Exim is running. The handler
246 doesn't actually get used unless alarm() has been called to set a timer, to
247 place a time limit on a system call of some kind. When the handler is run, it
250 There are some other SIGALRM handlers that are used in special cases when more
251 than just a flag setting is required; for example, when reading a message's
252 input. These are normally set up in the code module that uses them, and the
253 SIGALRM handler is reset to this one afterwards.
255 Argument: the signal value (SIGALRM)
260 sigalrm_handler(int sig
)
262 sig
= sig
; /* Keep picky compilers happy */
264 os_non_restarting_signal(SIGALRM
, sigalrm_handler
);
269 /*************************************************
270 * Sleep for a fractional time interval *
271 *************************************************/
273 /* This function is called by millisleep() and exim_wait_tick() to wait for a
274 period of time that may include a fraction of a second. The coding is somewhat
275 tedious. We do not expect setitimer() ever to fail, but if it does, the process
276 will wait for ever, so we panic in this instance. (There was a case of this
277 when a bug in a function that calls milliwait() caused it to pass invalid data.
278 That's when I added the check. :-)
280 We assume it to be not worth sleeping for under 100us; this value will
281 require revisiting as hardware advances. This avoids the issue of
282 a zero-valued timer setting meaning "never fire".
284 Argument: an itimerval structure containing the interval
289 milliwait(struct itimerval
*itval
)
292 sigset_t old_sigmask
;
294 if (itval
->it_value
.tv_usec
< 100 && itval
->it_value
.tv_sec
== 0)
296 (void)sigemptyset(&sigmask
); /* Empty mask */
297 (void)sigaddset(&sigmask
, SIGALRM
); /* Add SIGALRM */
298 (void)sigprocmask(SIG_BLOCK
, &sigmask
, &old_sigmask
); /* Block SIGALRM */
299 if (setitimer(ITIMER_REAL
, itval
, NULL
) < 0) /* Start timer */
300 log_write(0, LOG_MAIN
|LOG_PANIC_DIE
,
301 "setitimer() failed: %s", strerror(errno
));
302 (void)sigfillset(&sigmask
); /* All signals */
303 (void)sigdelset(&sigmask
, SIGALRM
); /* Remove SIGALRM */
304 (void)sigsuspend(&sigmask
); /* Until SIGALRM */
305 (void)sigprocmask(SIG_SETMASK
, &old_sigmask
, NULL
); /* Restore mask */
311 /*************************************************
312 * Millisecond sleep function *
313 *************************************************/
315 /* The basic sleep() function has a granularity of 1 second, which is too rough
316 in some cases - for example, when using an increasing delay to slow down
319 Argument: number of millseconds
326 struct itimerval itval
;
327 itval
.it_interval
.tv_sec
= 0;
328 itval
.it_interval
.tv_usec
= 0;
329 itval
.it_value
.tv_sec
= msec
/1000;
330 itval
.it_value
.tv_usec
= (msec
% 1000) * 1000;
336 /*************************************************
337 * Compare microsecond times *
338 *************************************************/
345 Returns: -1, 0, or +1
349 exim_tvcmp(struct timeval
*t1
, struct timeval
*t2
)
351 if (t1
->tv_sec
> t2
->tv_sec
) return +1;
352 if (t1
->tv_sec
< t2
->tv_sec
) return -1;
353 if (t1
->tv_usec
> t2
->tv_usec
) return +1;
354 if (t1
->tv_usec
< t2
->tv_usec
) return -1;
361 /*************************************************
362 * Clock tick wait function *
363 *************************************************/
365 /* Exim uses a time + a pid to generate a unique identifier in two places: its
366 message IDs, and in file names for maildir deliveries. Because some OS now
367 re-use pids within the same second, sub-second times are now being used.
368 However, for absolute certaintly, we must ensure the clock has ticked before
369 allowing the relevant process to complete. At the time of implementation of
370 this code (February 2003), the speed of processors is such that the clock will
371 invariably have ticked already by the time a process has done its job. This
372 function prepares for the time when things are faster - and it also copes with
373 clocks that go backwards.
376 then_tv A timeval which was used to create uniqueness; its usec field
377 has been rounded down to the value of the resolution.
378 We want to be sure the current time is greater than this.
379 resolution The resolution that was used to divide the microseconds
380 (1 for maildir, larger for message ids)
386 exim_wait_tick(struct timeval
*then_tv
, int resolution
)
388 struct timeval now_tv
;
389 long int now_true_usec
;
391 (void)gettimeofday(&now_tv
, NULL
);
392 now_true_usec
= now_tv
.tv_usec
;
393 now_tv
.tv_usec
= (now_true_usec
/resolution
) * resolution
;
395 if (exim_tvcmp(&now_tv
, then_tv
) <= 0)
397 struct itimerval itval
;
398 itval
.it_interval
.tv_sec
= 0;
399 itval
.it_interval
.tv_usec
= 0;
400 itval
.it_value
.tv_sec
= then_tv
->tv_sec
- now_tv
.tv_sec
;
401 itval
.it_value
.tv_usec
= then_tv
->tv_usec
+ resolution
- now_true_usec
;
403 /* We know that, overall, "now" is less than or equal to "then". Therefore, a
404 negative value for the microseconds is possible only in the case when "now"
405 is more than a second less than "then". That means that itval.it_value.tv_sec
406 is greater than zero. The following correction is therefore safe. */
408 if (itval
.it_value
.tv_usec
< 0)
410 itval
.it_value
.tv_usec
+= 1000000;
411 itval
.it_value
.tv_sec
-= 1;
414 DEBUG(D_transport
|D_receive
)
416 if (!running_in_test_harness
)
418 debug_printf("tick check: " TIME_T_FMT
".%06lu " TIME_T_FMT
".%06lu\n",
419 then_tv
->tv_sec
, (long) then_tv
->tv_usec
,
420 now_tv
.tv_sec
, (long) now_tv
.tv_usec
);
421 debug_printf("waiting " TIME_T_FMT
".%06lu\n",
422 itval
.it_value
.tv_sec
, (long) itval
.it_value
.tv_usec
);
433 /*************************************************
434 * Call fopen() with umask 777 and adjust mode *
435 *************************************************/
437 /* Exim runs with umask(0) so that files created with open() have the mode that
438 is specified in the open() call. However, there are some files, typically in
439 the spool directory, that are created with fopen(). They end up world-writeable
440 if no precautions are taken. Although the spool directory is not accessible to
441 the world, this is an untidiness. So this is a wrapper function for fopen()
442 that sorts out the mode of the created file.
445 filename the file name
446 options the fopen() options
447 mode the required mode
449 Returns: the fopened FILE or NULL
453 modefopen(const uschar
*filename
, const char *options
, mode_t mode
)
455 mode_t saved_umask
= umask(0777);
456 FILE *f
= Ufopen(filename
, options
);
457 (void)umask(saved_umask
);
458 if (f
!= NULL
) (void)fchmod(fileno(f
), mode
);
465 /*************************************************
466 * Ensure stdin, stdout, and stderr exist *
467 *************************************************/
469 /* Some operating systems grumble if an exec() happens without a standard
470 input, output, and error (fds 0, 1, 2) being defined. The worry is that some
471 file will be opened and will use these fd values, and then some other bit of
472 code will assume, for example, that it can write error messages to stderr.
473 This function ensures that fds 0, 1, and 2 are open if they do not already
474 exist, by connecting them to /dev/null.
476 This function is also used to ensure that std{in,out,err} exist at all times,
477 so that if any library that Exim calls tries to use them, it doesn't crash.
489 for (i
= 0; i
<= 2; i
++)
491 if (fstat(i
, &statbuf
) < 0 && errno
== EBADF
)
493 if (devnull
< 0) devnull
= open("/dev/null", O_RDWR
);
494 if (devnull
< 0) log_write(0, LOG_MAIN
|LOG_PANIC_DIE
, "%s",
495 string_open_failed(errno
, "/dev/null"));
496 if (devnull
!= i
) (void)dup2(devnull
, i
);
499 if (devnull
> 2) (void)close(devnull
);
505 /*************************************************
506 * Close unwanted file descriptors for delivery *
507 *************************************************/
509 /* This function is called from a new process that has been forked to deliver
510 an incoming message, either directly, or using exec.
512 We want any smtp input streams to be closed in this new process. However, it
513 has been observed that using fclose() here causes trouble. When reading in -bS
514 input, duplicate copies of messages have been seen. The files will be sharing a
515 file pointer with the parent process, and it seems that fclose() (at least on
516 some systems - I saw this on Solaris 2.5.1) messes with that file pointer, at
517 least sometimes. Hence we go for closing the underlying file descriptors.
519 If TLS is active, we want to shut down the TLS library, but without molesting
520 the parent's SSL connection.
522 For delivery of a non-SMTP message, we want to close stdin and stdout (and
523 stderr unless debugging) because the calling process might have set them up as
524 pipes and be waiting for them to close before it waits for the submission
525 process to terminate. If they aren't closed, they hold up the calling process
526 until the initial delivery process finishes, which is not what we want.
528 Exception: We do want it for synchronous delivery!
530 And notwithstanding all the above, if D_resolver is set, implying resolver
531 debugging, leave stdout open, because that's where the resolver writes its
534 When we close stderr (which implies we've also closed stdout), we also get rid
535 of any controlling terminal.
547 tls_close(TRUE
, FALSE
); /* Shut down the TLS library */
549 (void)close(fileno(smtp_in
));
550 (void)close(fileno(smtp_out
));
555 (void)close(0); /* stdin */
556 if ((debug_selector
& D_resolver
) == 0) (void)close(1); /* stdout */
557 if (debug_selector
== 0) /* stderr */
559 if (!synchronous_delivery
)
572 /*************************************************
574 *************************************************/
576 /* This function sets a new uid and gid permanently, optionally calling
577 initgroups() to set auxiliary groups. There are some special cases when running
578 Exim in unprivileged modes. In these situations the effective uid will not be
579 root; if we already have the right effective uid/gid, and don't need to
580 initialize any groups, leave things as they are.
585 igflag TRUE if initgroups() wanted
586 msg text to use in debugging output and failure log
588 Returns: nothing; bombs out on failure
592 exim_setugid(uid_t uid
, gid_t gid
, BOOL igflag
, uschar
*msg
)
594 uid_t euid
= geteuid();
595 gid_t egid
= getegid();
597 if (euid
== root_uid
|| euid
!= uid
|| egid
!= gid
|| igflag
)
599 /* At least one OS returns +1 for initgroups failure, so just check for
604 struct passwd
*pw
= getpwuid(uid
);
607 if (initgroups(pw
->pw_name
, gid
) != 0)
608 log_write(0,LOG_MAIN
|LOG_PANIC_DIE
,"initgroups failed for uid=%ld: %s",
609 (long int)uid
, strerror(errno
));
611 else log_write(0, LOG_MAIN
|LOG_PANIC_DIE
, "cannot run initgroups(): "
612 "no passwd entry for uid=%ld", (long int)uid
);
615 if (setgid(gid
) < 0 || setuid(uid
) < 0)
617 log_write(0, LOG_MAIN
|LOG_PANIC_DIE
, "unable to set gid=%ld or uid=%ld "
618 "(euid=%ld): %s", (long int)gid
, (long int)uid
, (long int)euid
, msg
);
622 /* Debugging output included uid/gid and all groups */
626 int group_count
, save_errno
;
627 gid_t group_list
[NGROUPS_MAX
];
628 debug_printf("changed uid/gid: %s\n uid=%ld gid=%ld pid=%ld\n", msg
,
629 (long int)geteuid(), (long int)getegid(), (long int)getpid());
630 group_count
= getgroups(NGROUPS_MAX
, group_list
);
632 debug_printf(" auxiliary group list:");
636 for (i
= 0; i
< group_count
; i
++) debug_printf(" %d", (int)group_list
[i
]);
638 else if (group_count
< 0)
639 debug_printf(" <error: %s>", strerror(save_errno
));
640 else debug_printf(" <none>");
648 /*************************************************
650 *************************************************/
652 /* Exim exits via this function so that it always clears up any open
658 Returns: does not return
666 debug_printf(">>>>>>>>>>>>>>>> Exim pid=%d terminating with rc=%d "
667 ">>>>>>>>>>>>>>>>\n", (int)getpid(), 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");
843 #ifdef EXPERIMENTAL_LMDB
844 fprintf(f
, " Experimental_LMDB");
846 #ifdef EXPERIMENTAL_QUEUEFILE
847 fprintf(f
, " Experimental_QUEUEFILE");
849 #ifdef EXPERIMENTAL_SPF
850 fprintf(f
, " Experimental_SPF");
852 #ifdef EXPERIMENTAL_SRS
853 fprintf(f
, " Experimental_SRS");
855 #ifdef EXPERIMENTAL_BRIGHTMAIL
856 fprintf(f
, " Experimental_Brightmail");
858 #ifdef EXPERIMENTAL_DANE
859 fprintf(f
, " Experimental_DANE");
861 #ifdef EXPERIMENTAL_DCC
862 fprintf(f
, " Experimental_DCC");
864 #ifdef EXPERIMENTAL_DMARC
865 fprintf(f
, " Experimental_DMARC");
867 #ifdef EXPERIMENTAL_DSN_INFO
868 fprintf(f
, " Experimental_DSN_info");
872 fprintf(f
, "Lookups (built-in):");
873 #if defined(LOOKUP_LSEARCH) && LOOKUP_LSEARCH!=2
874 fprintf(f
, " lsearch wildlsearch nwildlsearch iplsearch");
876 #if defined(LOOKUP_CDB) && LOOKUP_CDB!=2
879 #if defined(LOOKUP_DBM) && LOOKUP_DBM!=2
880 fprintf(f
, " dbm dbmjz dbmnz");
882 #if defined(LOOKUP_DNSDB) && LOOKUP_DNSDB!=2
883 fprintf(f
, " dnsdb");
885 #if defined(LOOKUP_DSEARCH) && LOOKUP_DSEARCH!=2
886 fprintf(f
, " dsearch");
888 #if defined(LOOKUP_IBASE) && LOOKUP_IBASE!=2
889 fprintf(f
, " ibase");
891 #if defined(LOOKUP_LDAP) && LOOKUP_LDAP!=2
892 fprintf(f
, " ldap ldapdn ldapm");
894 #ifdef EXPERIMENTAL_LMDB
897 #if defined(LOOKUP_MYSQL) && LOOKUP_MYSQL!=2
898 fprintf(f
, " mysql");
900 #if defined(LOOKUP_NIS) && LOOKUP_NIS!=2
901 fprintf(f
, " nis nis0");
903 #if defined(LOOKUP_NISPLUS) && LOOKUP_NISPLUS!=2
904 fprintf(f
, " nisplus");
906 #if defined(LOOKUP_ORACLE) && LOOKUP_ORACLE!=2
907 fprintf(f
, " oracle");
909 #if defined(LOOKUP_PASSWD) && LOOKUP_PASSWD!=2
910 fprintf(f
, " passwd");
912 #if defined(LOOKUP_PGSQL) && LOOKUP_PGSQL!=2
913 fprintf(f
, " pgsql");
915 #if defined(LOOKUP_REDIS) && LOOKUP_REDIS!=2
916 fprintf(f
, " redis");
918 #if defined(LOOKUP_SQLITE) && LOOKUP_SQLITE!=2
919 fprintf(f
, " sqlite");
921 #if defined(LOOKUP_TESTDB) && LOOKUP_TESTDB!=2
922 fprintf(f
, " testdb");
924 #if defined(LOOKUP_WHOSON) && LOOKUP_WHOSON!=2
925 fprintf(f
, " whoson");
929 fprintf(f
, "Authenticators:");
931 fprintf(f
, " cram_md5");
933 #ifdef AUTH_CYRUS_SASL
934 fprintf(f
, " cyrus_sasl");
937 fprintf(f
, " dovecot");
940 fprintf(f
, " gsasl");
942 #ifdef AUTH_HEIMDAL_GSSAPI
943 fprintf(f
, " heimdal_gssapi");
945 #ifdef AUTH_PLAINTEXT
946 fprintf(f
, " plaintext");
956 fprintf(f
, "Routers:");
958 fprintf(f
, " accept");
960 #ifdef ROUTER_DNSLOOKUP
961 fprintf(f
, " dnslookup");
963 #ifdef ROUTER_IPLITERAL
964 fprintf(f
, " ipliteral");
966 #ifdef ROUTER_IPLOOKUP
967 fprintf(f
, " iplookup");
969 #ifdef ROUTER_MANUALROUTE
970 fprintf(f
, " manualroute");
972 #ifdef ROUTER_QUERYPROGRAM
973 fprintf(f
, " queryprogram");
975 #ifdef ROUTER_REDIRECT
976 fprintf(f
, " redirect");
980 fprintf(f
, "Transports:");
981 #ifdef TRANSPORT_APPENDFILE
982 fprintf(f
, " appendfile");
983 #ifdef SUPPORT_MAILDIR
984 fprintf(f
, "/maildir");
986 #ifdef SUPPORT_MAILSTORE
987 fprintf(f
, "/mailstore");
993 #ifdef TRANSPORT_AUTOREPLY
994 fprintf(f
, " autoreply");
996 #ifdef TRANSPORT_LMTP
999 #ifdef TRANSPORT_PIPE
1000 fprintf(f
, " pipe");
1002 #ifdef EXPERIMENTAL_QUEUEFILE
1003 fprintf(f
, " queuefile");
1005 #ifdef TRANSPORT_SMTP
1006 fprintf(f
, " smtp");
1010 if (fixed_never_users
[0] > 0)
1013 fprintf(f
, "Fixed never_users: ");
1014 for (i
= 1; i
<= (int)fixed_never_users
[0] - 1; i
++)
1015 fprintf(f
, "%d:", (unsigned int)fixed_never_users
[i
]);
1016 fprintf(f
, "%d\n", (unsigned int)fixed_never_users
[i
]);
1019 fprintf(f
, "Configure owner: %d:%d\n", config_uid
, config_gid
);
1021 fprintf(f
, "Size of off_t: " SIZE_T_FMT
"\n", sizeof(off_t
));
1023 /* Everything else is details which are only worth reporting when debugging.
1024 Perhaps the tls_version_report should move into this too. */
1029 /* clang defines __GNUC__ (at least, for me) so test for it first */
1030 #if defined(__clang__)
1031 fprintf(f
, "Compiler: CLang [%s]\n", __clang_version__
);
1032 #elif defined(__GNUC__)
1033 fprintf(f
, "Compiler: GCC [%s]\n",
1037 "? unknown version ?"
1041 fprintf(f
, "Compiler: <unknown>\n");
1045 fprintf(f
, "Library version: Glibc: Compile: %d.%d\n",
1046 __GLIBC__
, __GLIBC_MINOR__
);
1047 if (__GLIBC_PREREQ(2, 1))
1048 fprintf(f
, " Runtime: %s\n",
1049 gnu_get_libc_version());
1053 tls_version_report(f
);
1056 utf8_version_report(f
);
1059 for (authi
= auths_available
; *authi
->driver_name
!= '\0'; ++authi
)
1060 if (authi
->version_report
)
1061 (*authi
->version_report
)(f
);
1063 /* PCRE_PRERELEASE is either defined and empty or a bare sequence of
1064 characters; unless it's an ancient version of PCRE in which case it
1066 #ifndef PCRE_PRERELEASE
1067 # define PCRE_PRERELEASE
1070 #define EXPAND_AND_QUOTE(X) QUOTE(X)
1071 fprintf(f
, "Library version: PCRE: Compile: %d.%d%s\n"
1073 PCRE_MAJOR
, PCRE_MINOR
,
1074 EXPAND_AND_QUOTE(PCRE_PRERELEASE
) "",
1077 #undef EXPAND_AND_QUOTE
1080 for (i
= 0; i
< lookup_list_count
; i
++)
1081 if (lookup_list
[i
]->version_report
)
1082 lookup_list
[i
]->version_report(f
);
1084 #ifdef WHITELIST_D_MACROS
1085 fprintf(f
, "WHITELIST_D_MACROS: \"%s\"\n", WHITELIST_D_MACROS
);
1087 fprintf(f
, "WHITELIST_D_MACROS unset\n");
1089 #ifdef TRUSTED_CONFIG_LIST
1090 fprintf(f
, "TRUSTED_CONFIG_LIST: \"%s\"\n", TRUSTED_CONFIG_LIST
);
1092 fprintf(f
, "TRUSTED_CONFIG_LIST unset\n");
1099 /*************************************************
1100 * Show auxiliary information about Exim *
1101 *************************************************/
1104 show_exim_information(enum commandline_info request
, FILE *stream
)
1111 fprintf(stream
, "Oops, something went wrong.\n");
1115 "The -bI: flag takes a string indicating which information to provide.\n"
1116 "If the string is not recognised, you'll get this help (on stderr).\n"
1118 " exim -bI:help this information\n"
1119 " exim -bI:dscp dscp value keywords known\n"
1120 " exim -bI:sieve list of supported sieve extensions, one per line.\n"
1124 for (pp
= exim_sieve_extension_list
; *pp
; ++pp
)
1125 fprintf(stream
, "%s\n", *pp
);
1128 dscp_list_to_stream(stream
);
1134 /*************************************************
1135 * Quote a local part *
1136 *************************************************/
1138 /* This function is used when a sender address or a From: or Sender: header
1139 line is being created from the caller's login, or from an authenticated_id. It
1140 applies appropriate quoting rules for a local part.
1142 Argument: the local part
1143 Returns: the local part, quoted if necessary
1147 local_part_quote(uschar
*lpart
)
1149 BOOL needs_quote
= FALSE
;
1154 for (t
= lpart
; !needs_quote
&& *t
!= 0; t
++)
1156 needs_quote
= !isalnum(*t
) && strchr("!#$%&'*+-/=?^_`{|}~", *t
) == NULL
&&
1157 (*t
!= '.' || t
== lpart
|| t
[1] == 0);
1160 if (!needs_quote
) return lpart
;
1163 yield
= string_catn(NULL
, &size
, &ptr
, US
"\"", 1);
1167 uschar
*nq
= US
Ustrpbrk(lpart
, "\\\"");
1170 yield
= string_cat(yield
, &size
, &ptr
, lpart
);
1173 yield
= string_catn(yield
, &size
, &ptr
, lpart
, nq
- lpart
);
1174 yield
= string_catn(yield
, &size
, &ptr
, US
"\\", 1);
1175 yield
= string_catn(yield
, &size
, &ptr
, nq
, 1);
1179 yield
= string_catn(yield
, &size
, &ptr
, US
"\"", 1);
1187 /*************************************************
1188 * Load readline() functions *
1189 *************************************************/
1191 /* This function is called from testing executions that read data from stdin,
1192 but only when running as the calling user. Currently, only -be does this. The
1193 function loads the readline() function library and passes back the functions.
1194 On some systems, it needs the curses library, so load that too, but try without
1195 it if loading fails. All this functionality has to be requested at build time.
1198 fn_readline_ptr pointer to where to put the readline pointer
1199 fn_addhist_ptr pointer to where to put the addhistory function
1201 Returns: the dlopen handle or NULL on failure
1205 set_readline(char * (**fn_readline_ptr
)(const char *),
1206 void (**fn_addhist_ptr
)(const char *))
1209 void *dlhandle_curses
= dlopen("libcurses." DYNLIB_FN_EXT
, RTLD_GLOBAL
|RTLD_LAZY
);
1211 dlhandle
= dlopen("libreadline." DYNLIB_FN_EXT
, RTLD_GLOBAL
|RTLD_NOW
);
1212 if (dlhandle_curses
!= NULL
) dlclose(dlhandle_curses
);
1214 if (dlhandle
!= NULL
)
1216 /* Checked manual pages; at least in GNU Readline 6.1, the prototypes are:
1217 * char * readline (const char *prompt);
1218 * void add_history (const char *string);
1220 *fn_readline_ptr
= (char *(*)(const char*))dlsym(dlhandle
, "readline");
1221 *fn_addhist_ptr
= (void(*)(const char*))dlsym(dlhandle
, "add_history");
1225 DEBUG(D_any
) debug_printf("failed to load readline: %s\n", dlerror());
1234 /*************************************************
1235 * Get a line from stdin for testing things *
1236 *************************************************/
1238 /* This function is called when running tests that can take a number of lines
1239 of input (for example, -be and -bt). It handles continuations and trailing
1240 spaces. And prompting and a blank line output on eof. If readline() is in use,
1241 the arguments are non-NULL and provide the relevant functions.
1244 fn_readline readline function or NULL
1245 fn_addhist addhist function or NULL
1247 Returns: pointer to dynamic memory, or NULL at end of file
1251 get_stdinput(char *(*fn_readline
)(const char *), void(*fn_addhist
)(const char *))
1256 uschar
*yield
= NULL
;
1258 if (fn_readline
== NULL
) { printf("> "); fflush(stdout
); }
1262 uschar buffer
[1024];
1266 char *readline_line
= NULL
;
1267 if (fn_readline
!= NULL
)
1269 if ((readline_line
= fn_readline((i
> 0)? "":"> ")) == NULL
) break;
1270 if (*readline_line
!= 0 && fn_addhist
!= NULL
) fn_addhist(readline_line
);
1271 p
= US readline_line
;
1276 /* readline() not in use */
1279 if (Ufgets(buffer
, sizeof(buffer
), stdin
) == NULL
) break;
1283 /* Handle the line */
1285 ss
= p
+ (int)Ustrlen(p
);
1286 while (ss
> p
&& isspace(ss
[-1])) ss
--;
1290 while (p
< ss
&& isspace(*p
)) p
++; /* leading space after cont */
1293 yield
= string_catn(yield
, &size
, &ptr
, p
, ss
- p
);
1296 if (fn_readline
!= NULL
) free(readline_line
);
1299 /* yield can only be NULL if ss==p */
1300 if (ss
== p
|| yield
[ptr
-1] != '\\')
1302 if (yield
) yield
[ptr
] = 0;
1308 if (yield
== NULL
) printf("\n");
1314 /*************************************************
1315 * Output usage information for the program *
1316 *************************************************/
1318 /* This function is called when there are no recipients
1319 or a specific --help argument was added.
1322 progname information on what name we were called by
1324 Returns: DOES NOT RETURN
1328 exim_usage(uschar
*progname
)
1331 /* Handle specific program invocation varients */
1332 if (Ustrcmp(progname
, US
"-mailq") == 0)
1335 "mailq - list the contents of the mail queue\n\n"
1336 "For a list of options, see the Exim documentation.\n");
1340 /* Generic usage - we output this whatever happens */
1342 "Exim is a Mail Transfer Agent. It is normally called by Mail User Agents,\n"
1343 "not directly from a shell command line. Options and/or arguments control\n"
1344 "what it does when called. For a list of options, see the Exim documentation.\n");
1351 /*************************************************
1352 * Validate that the macros given are okay *
1353 *************************************************/
1355 /* Typically, Exim will drop privileges if macros are supplied. In some
1356 cases, we want to not do so.
1358 Arguments: opt_D_used - true if the commandline had a "-D" option
1359 Returns: true if trusted, false otherwise
1363 macros_trusted(BOOL opt_D_used
)
1365 #ifdef WHITELIST_D_MACROS
1367 uschar
*whitelisted
, *end
, *p
, **whites
, **w
;
1368 int white_count
, i
, n
;
1370 BOOL prev_char_item
, found
;
1375 #ifndef WHITELIST_D_MACROS
1379 /* We only trust -D overrides for some invoking users:
1380 root, the exim run-time user, the optional config owner user.
1381 I don't know why config-owner would be needed, but since they can own the
1382 config files anyway, there's no security risk to letting them override -D. */
1383 if ( ! ((real_uid
== root_uid
)
1384 || (real_uid
== exim_uid
)
1385 #ifdef CONFIGURE_OWNER
1386 || (real_uid
== config_uid
)
1390 debug_printf("macros_trusted rejecting macros for uid %d\n", (int) real_uid
);
1394 /* Get a list of macros which are whitelisted */
1395 whitelisted
= string_copy_malloc(US WHITELIST_D_MACROS
);
1396 prev_char_item
= FALSE
;
1398 for (p
= whitelisted
; *p
!= '\0'; ++p
)
1400 if (*p
== ':' || isspace(*p
))
1405 prev_char_item
= FALSE
;
1408 if (!prev_char_item
)
1409 prev_char_item
= TRUE
;
1416 whites
= store_malloc(sizeof(uschar
*) * (white_count
+1));
1417 for (p
= whitelisted
, i
= 0; (p
!= end
) && (i
< white_count
); ++p
)
1422 if (i
== white_count
)
1424 while (*p
!= '\0' && p
< end
)
1430 /* The list of commandline macros should be very short.
1431 Accept the N*M complexity. */
1432 for (m
= macros
; m
; m
= m
->next
) if (m
->command_line
)
1435 for (w
= whites
; *w
; ++w
)
1436 if (Ustrcmp(*w
, m
->name
) == 0)
1443 if (m
->replacement
== NULL
)
1445 len
= Ustrlen(m
->replacement
);
1448 n
= pcre_exec(regex_whitelisted_macro
, NULL
, CS m
->replacement
, len
,
1449 0, PCRE_EOPT
, NULL
, 0);
1452 if (n
!= PCRE_ERROR_NOMATCH
)
1453 debug_printf("macros_trusted checking %s returned %d\n", m
->name
, n
);
1457 DEBUG(D_any
) debug_printf("macros_trusted overridden to true by whitelisting\n");
1463 /*************************************************
1464 * Entry point and high-level code *
1465 *************************************************/
1467 /* Entry point for the Exim mailer. Analyse the arguments and arrange to take
1468 the appropriate action. All the necessary functions are present in the one
1469 binary. I originally thought one should split it up, but it turns out that so
1470 much of the apparatus is needed in each chunk that one might as well just have
1471 it all available all the time, which then makes the coding easier as well.
1474 argc count of entries in argv
1475 argv argument strings, with argv[0] being the program name
1477 Returns: EXIT_SUCCESS if terminated successfully
1478 EXIT_FAILURE otherwise, except when a message has been sent
1479 to the sender, and -oee was given
1483 main(int argc
, char **cargv
)
1485 uschar
**argv
= USS cargv
;
1486 int arg_receive_timeout
= -1;
1487 int arg_smtp_receive_timeout
= -1;
1488 int arg_error_handling
= error_handling
;
1489 int filter_sfd
= -1;
1490 int filter_ufd
= -1;
1493 int list_queue_option
= 0;
1495 int msg_action_arg
= -1;
1496 int namelen
= (argv
[0] == NULL
)? 0 : Ustrlen(argv
[0]);
1497 int queue_only_reason
= 0;
1499 int perl_start_option
= 0;
1501 int recipients_arg
= argc
;
1502 int sender_address_domain
= 0;
1503 int test_retry_arg
= -1;
1504 int test_rewrite_arg
= -1;
1505 BOOL arg_queue_only
= FALSE
;
1506 BOOL bi_option
= FALSE
;
1507 BOOL checking
= FALSE
;
1508 BOOL count_queue
= FALSE
;
1509 BOOL expansion_test
= FALSE
;
1510 BOOL extract_recipients
= FALSE
;
1511 BOOL flag_G
= FALSE
;
1512 BOOL flag_n
= FALSE
;
1513 BOOL forced_delivery
= FALSE
;
1514 BOOL f_end_dot
= FALSE
;
1515 BOOL deliver_give_up
= FALSE
;
1516 BOOL list_queue
= FALSE
;
1517 BOOL list_options
= FALSE
;
1518 BOOL list_config
= FALSE
;
1519 BOOL local_queue_only
;
1521 BOOL one_msg_action
= FALSE
;
1522 BOOL opt_D_used
= FALSE
;
1523 BOOL queue_only_set
= FALSE
;
1524 BOOL receiving_message
= TRUE
;
1525 BOOL sender_ident_set
= FALSE
;
1526 BOOL session_local_queue_only
;
1528 BOOL removed_privilege
= FALSE
;
1529 BOOL usage_wanted
= FALSE
;
1530 BOOL verify_address_mode
= FALSE
;
1531 BOOL verify_as_sender
= FALSE
;
1532 BOOL version_printed
= FALSE
;
1533 uschar
*alias_arg
= NULL
;
1534 uschar
*called_as
= US
"";
1535 uschar
*cmdline_syslog_name
= NULL
;
1536 uschar
*start_queue_run_id
= NULL
;
1537 uschar
*stop_queue_run_id
= NULL
;
1538 uschar
*expansion_test_message
= NULL
;
1539 uschar
*ftest_domain
= NULL
;
1540 uschar
*ftest_localpart
= NULL
;
1541 uschar
*ftest_prefix
= NULL
;
1542 uschar
*ftest_suffix
= NULL
;
1543 uschar
*log_oneline
= NULL
;
1544 uschar
*malware_test_file
= NULL
;
1545 uschar
*real_sender_address
;
1546 uschar
*originator_home
= US
"/";
1551 struct stat statbuf
;
1552 pid_t passed_qr_pid
= (pid_t
)0;
1553 int passed_qr_pipe
= -1;
1554 gid_t group_list
[NGROUPS_MAX
];
1556 /* For the -bI: flag */
1557 enum commandline_info info_flag
= CMDINFO_NONE
;
1558 BOOL info_stdout
= FALSE
;
1560 /* Possible options for -R and -S */
1562 static uschar
*rsopts
[] = { US
"f", US
"ff", US
"r", US
"rf", US
"rff" };
1564 /* Need to define this in case we need to change the environment in order
1565 to get rid of a bogus time zone. We have to make it char rather than uschar
1566 because some OS define it in /usr/include/unistd.h. */
1568 extern char **environ
;
1570 /* If the Exim user and/or group and/or the configuration file owner/group were
1571 defined by ref:name at build time, we must now find the actual uid/gid values.
1572 This is a feature to make the lives of binary distributors easier. */
1574 #ifdef EXIM_USERNAME
1575 if (route_finduser(US EXIM_USERNAME
, &pw
, &exim_uid
))
1579 fprintf(stderr
, "exim: refusing to run with uid 0 for \"%s\"\n",
1583 /* If ref:name uses a number as the name, route_finduser() returns
1584 TRUE with exim_uid set and pw coerced to NULL. */
1586 exim_gid
= pw
->pw_gid
;
1587 #ifndef EXIM_GROUPNAME
1591 "exim: ref:name should specify a usercode, not a group.\n"
1592 "exim: can't let you get away with it unless you also specify a group.\n");
1599 fprintf(stderr
, "exim: failed to find uid for user name \"%s\"\n",
1605 #ifdef EXIM_GROUPNAME
1606 if (!route_findgroup(US EXIM_GROUPNAME
, &exim_gid
))
1608 fprintf(stderr
, "exim: failed to find gid for group name \"%s\"\n",
1614 #ifdef CONFIGURE_OWNERNAME
1615 if (!route_finduser(US CONFIGURE_OWNERNAME
, NULL
, &config_uid
))
1617 fprintf(stderr
, "exim: failed to find uid for user name \"%s\"\n",
1618 CONFIGURE_OWNERNAME
);
1623 /* We default the system_filter_user to be the Exim run-time user, as a
1624 sane non-root value. */
1625 system_filter_uid
= exim_uid
;
1627 #ifdef CONFIGURE_GROUPNAME
1628 if (!route_findgroup(US CONFIGURE_GROUPNAME
, &config_gid
))
1630 fprintf(stderr
, "exim: failed to find gid for group name \"%s\"\n",
1631 CONFIGURE_GROUPNAME
);
1636 /* In the Cygwin environment, some initialization used to need doing.
1637 It was fudged in by means of this macro; now no longer but we'll leave
1638 it in case of others. */
1644 /* Check a field which is patched when we are running Exim within its
1645 testing harness; do a fast initial check, and then the whole thing. */
1647 running_in_test_harness
=
1648 *running_status
== '<' && Ustrcmp(running_status
, "<<<testing>>>") == 0;
1650 /* The C standard says that the equivalent of setlocale(LC_ALL, "C") is obeyed
1651 at the start of a program; however, it seems that some environments do not
1652 follow this. A "strange" locale can affect the formatting of timestamps, so we
1655 setlocale(LC_ALL
, "C");
1657 /* Set up the default handler for timing using alarm(). */
1659 os_non_restarting_signal(SIGALRM
, sigalrm_handler
);
1661 /* Ensure we have a buffer for constructing log entries. Use malloc directly,
1662 because store_malloc writes a log entry on failure. */
1664 if (!(log_buffer
= US
malloc(LOG_BUFFER_SIZE
)))
1666 fprintf(stderr
, "exim: failed to get store for log buffer\n");
1670 /* Initialize the default log options. */
1672 bits_set(log_selector
, log_selector_size
, log_default
);
1674 /* Set log_stderr to stderr, provided that stderr exists. This gets reset to
1675 NULL when the daemon is run and the file is closed. We have to use this
1676 indirection, because some systems don't allow writing to the variable "stderr".
1679 if (fstat(fileno(stderr
), &statbuf
) >= 0) log_stderr
= stderr
;
1681 /* Arrange for the PCRE regex library to use our store functions. Note that
1682 the normal calls are actually macros that add additional arguments for
1683 debugging purposes so we have to assign specially constructed functions here.
1684 The default is to use store in the stacking pool, but this is overridden in the
1685 regex_must_compile() function. */
1687 pcre_malloc
= function_store_get
;
1688 pcre_free
= function_dummy_free
;
1690 /* Ensure there is a big buffer for temporary use in several places. It is put
1691 in malloc store so that it can be freed for enlargement if necessary. */
1693 big_buffer
= store_malloc(big_buffer_size
);
1695 /* Set up the handler for the data request signal, and set the initial
1696 descriptive text. */
1698 set_process_info("initializing");
1699 os_restarting_signal(SIGUSR1
, usr1_handler
);
1701 /* SIGHUP is used to get the daemon to reconfigure. It gets set as appropriate
1702 in the daemon code. For the rest of Exim's uses, we ignore it. */
1704 signal(SIGHUP
, SIG_IGN
);
1706 /* We don't want to die on pipe errors as the code is written to handle
1707 the write error instead. */
1709 signal(SIGPIPE
, SIG_IGN
);
1711 /* Under some circumstance on some OS, Exim can get called with SIGCHLD
1712 set to SIG_IGN. This causes subprocesses that complete before the parent
1713 process waits for them not to hang around, so when Exim calls wait(), nothing
1714 is there. The wait() code has been made robust against this, but let's ensure
1715 that SIGCHLD is set to SIG_DFL, because it's tidier to wait and get a process
1716 ending status. We use sigaction rather than plain signal() on those OS where
1717 SA_NOCLDWAIT exists, because we want to be sure it is turned off. (There was a
1718 problem on AIX with this.) */
1722 struct sigaction act
;
1723 act
.sa_handler
= SIG_DFL
;
1724 sigemptyset(&(act
.sa_mask
));
1726 sigaction(SIGCHLD
, &act
, NULL
);
1729 signal(SIGCHLD
, SIG_DFL
);
1732 /* Save the arguments for use if we re-exec exim as a daemon after receiving
1737 /* Set up the version number. Set up the leading 'E' for the external form of
1738 message ids, set the pointer to the internal form, and initialize it to
1739 indicate no message being processed. */
1742 message_id_option
[0] = '-';
1743 message_id_external
= message_id_option
+ 1;
1744 message_id_external
[0] = 'E';
1745 message_id
= message_id_external
+ 1;
1748 /* Set the umask to zero so that any files Exim creates using open() are
1749 created with the modes that it specifies. NOTE: Files created with fopen() have
1750 a problem, which was not recognized till rather late (February 2006). With this
1751 umask, such files will be world writeable. (They are all content scanning files
1752 in the spool directory, which isn't world-accessible, so this is not a
1753 disaster, but it's untidy.) I don't want to change this overall setting,
1754 however, because it will interact badly with the open() calls. Instead, there's
1755 now a function called modefopen() that fiddles with the umask while calling
1760 /* Precompile the regular expression for matching a message id. Keep this in
1761 step with the code that generates ids in the accept.c module. We need to do
1762 this here, because the -M options check their arguments for syntactic validity
1763 using mac_ismsgid, which uses this. */
1766 regex_must_compile(US
"^(?:[^\\W_]{6}-){2}[^\\W_]{2}$", FALSE
, TRUE
);
1768 /* Precompile the regular expression that is used for matching an SMTP error
1769 code, possibly extended, at the start of an error message. Note that the
1770 terminating whitespace character is included. */
1773 regex_must_compile(US
"^\\d\\d\\d\\s(?:\\d\\.\\d\\d?\\d?\\.\\d\\d?\\d?\\s)?",
1776 #ifdef WHITELIST_D_MACROS
1777 /* Precompile the regular expression used to filter the content of macros
1778 given to -D for permissibility. */
1780 regex_whitelisted_macro
=
1781 regex_must_compile(US
"^[A-Za-z0-9_/.-]*$", FALSE
, TRUE
);
1784 for (i
= 0; i
< REGEX_VARS
; i
++) regex_vars
[i
] = NULL
;
1786 /* If the program is called as "mailq" treat it as equivalent to "exim -bp";
1787 this seems to be a generally accepted convention, since one finds symbolic
1788 links called "mailq" in standard OS configurations. */
1790 if ((namelen
== 5 && Ustrcmp(argv
[0], "mailq") == 0) ||
1791 (namelen
> 5 && Ustrncmp(argv
[0] + namelen
- 6, "/mailq", 6) == 0))
1794 receiving_message
= FALSE
;
1795 called_as
= US
"-mailq";
1798 /* If the program is called as "rmail" treat it as equivalent to
1799 "exim -i -oee", thus allowing UUCP messages to be input using non-SMTP mode,
1800 i.e. preventing a single dot on a line from terminating the message, and
1801 returning with zero return code, even in cases of error (provided an error
1802 message has been sent). */
1804 if ((namelen
== 5 && Ustrcmp(argv
[0], "rmail") == 0) ||
1805 (namelen
> 5 && Ustrncmp(argv
[0] + namelen
- 6, "/rmail", 6) == 0))
1808 called_as
= US
"-rmail";
1809 errors_sender_rc
= EXIT_SUCCESS
;
1812 /* If the program is called as "rsmtp" treat it as equivalent to "exim -bS";
1813 this is a smail convention. */
1815 if ((namelen
== 5 && Ustrcmp(argv
[0], "rsmtp") == 0) ||
1816 (namelen
> 5 && Ustrncmp(argv
[0] + namelen
- 6, "/rsmtp", 6) == 0))
1818 smtp_input
= smtp_batched_input
= TRUE
;
1819 called_as
= US
"-rsmtp";
1822 /* If the program is called as "runq" treat it as equivalent to "exim -q";
1823 this is a smail convention. */
1825 if ((namelen
== 4 && Ustrcmp(argv
[0], "runq") == 0) ||
1826 (namelen
> 4 && Ustrncmp(argv
[0] + namelen
- 5, "/runq", 5) == 0))
1829 receiving_message
= FALSE
;
1830 called_as
= US
"-runq";
1833 /* If the program is called as "newaliases" treat it as equivalent to
1834 "exim -bi"; this is a sendmail convention. */
1836 if ((namelen
== 10 && Ustrcmp(argv
[0], "newaliases") == 0) ||
1837 (namelen
> 10 && Ustrncmp(argv
[0] + namelen
- 11, "/newaliases", 11) == 0))
1840 receiving_message
= FALSE
;
1841 called_as
= US
"-newaliases";
1844 /* Save the original effective uid for a couple of uses later. It should
1845 normally be root, but in some esoteric environments it may not be. */
1847 original_euid
= geteuid();
1849 /* Get the real uid and gid. If the caller is root, force the effective uid/gid
1850 to be the same as the real ones. This makes a difference only if Exim is setuid
1851 (or setgid) to something other than root, which could be the case in some
1852 special configurations. */
1854 real_uid
= getuid();
1855 real_gid
= getgid();
1857 if (real_uid
== root_uid
)
1859 rv
= setgid(real_gid
);
1862 fprintf(stderr
, "exim: setgid(%ld) failed: %s\n",
1863 (long int)real_gid
, strerror(errno
));
1866 rv
= setuid(real_uid
);
1869 fprintf(stderr
, "exim: setuid(%ld) failed: %s\n",
1870 (long int)real_uid
, strerror(errno
));
1875 /* If neither the original real uid nor the original euid was root, Exim is
1876 running in an unprivileged state. */
1878 unprivileged
= (real_uid
!= root_uid
&& original_euid
!= root_uid
);
1880 /* Scan the program's arguments. Some can be dealt with right away; others are
1881 simply recorded for checking and handling afterwards. Do a high-level switch
1882 on the second character (the one after '-'), to save some effort. */
1884 for (i
= 1; i
< argc
; i
++)
1886 BOOL badarg
= FALSE
;
1887 uschar
*arg
= argv
[i
];
1891 /* An argument not starting with '-' is the start of a recipients list;
1892 break out of the options-scanning loop. */
1900 /* An option consistion of -- terminates the options */
1902 if (Ustrcmp(arg
, "--") == 0)
1904 recipients_arg
= i
+ 1;
1908 /* Handle flagged options */
1910 switchchar
= arg
[1];
1913 /* Make all -ex options synonymous with -oex arguments, since that
1914 is assumed by various callers. Also make -qR options synonymous with -R
1915 options, as that seems to be required as well. Allow for -qqR too, and
1916 the same for -S options. */
1918 if (Ustrncmp(arg
+1, "oe", 2) == 0 ||
1919 Ustrncmp(arg
+1, "qR", 2) == 0 ||
1920 Ustrncmp(arg
+1, "qS", 2) == 0)
1922 switchchar
= arg
[2];
1925 else if (Ustrncmp(arg
+1, "qqR", 3) == 0 || Ustrncmp(arg
+1, "qqS", 3) == 0)
1927 switchchar
= arg
[3];
1929 queue_2stage
= TRUE
;
1932 /* Make -r synonymous with -f, since it is a documented alias */
1934 else if (arg
[1] == 'r') switchchar
= 'f';
1936 /* Make -ov synonymous with -v */
1938 else if (Ustrcmp(arg
, "-ov") == 0)
1944 /* deal with --option_aliases */
1945 else if (switchchar
== '-')
1947 if (Ustrcmp(argrest
, "help") == 0)
1949 usage_wanted
= TRUE
;
1952 else if (Ustrcmp(argrest
, "version") == 0)
1959 /* High-level switch on active initial letter */
1964 /* sendmail uses -Ac and -Am to control which .cf file is used;
1967 if (*argrest
== '\0') { badarg
= TRUE
; break; }
1970 BOOL ignore
= FALSE
;
1975 if (*(argrest
+ 1) == '\0')
1979 if (!ignore
) { badarg
= TRUE
; break; }
1983 /* -Btype is a sendmail option for 7bit/8bit setting. Exim is 8-bit clean
1984 so has no need of it. */
1987 if (*argrest
== 0) i
++; /* Skip over the type */
1992 receiving_message
= FALSE
; /* Reset TRUE for -bm, -bS, -bs below */
1994 /* -bd: Run in daemon mode, awaiting SMTP connections.
1995 -bdf: Ditto, but in the foreground.
1998 if (*argrest
== 'd')
2000 daemon_listen
= TRUE
;
2001 if (*(++argrest
) == 'f') background_daemon
= FALSE
;
2002 else if (*argrest
!= 0) { badarg
= TRUE
; break; }
2005 /* -be: Run in expansion test mode
2006 -bem: Ditto, but read a message from a file first
2009 else if (*argrest
== 'e')
2011 expansion_test
= checking
= TRUE
;
2012 if (argrest
[1] == 'm')
2014 if (++i
>= argc
) { badarg
= TRUE
; break; }
2015 expansion_test_message
= argv
[i
];
2018 if (argrest
[1] != 0) { badarg
= TRUE
; break; }
2021 /* -bF: Run system filter test */
2023 else if (*argrest
== 'F')
2025 filter_test
|= checking
= FTEST_SYSTEM
;
2026 if (*(++argrest
) != 0) { badarg
= TRUE
; break; }
2027 if (++i
< argc
) filter_test_sfile
= argv
[i
]; else
2029 fprintf(stderr
, "exim: file name expected after %s\n", argv
[i
-1]);
2034 /* -bf: Run user filter test
2035 -bfd: Set domain for filter testing
2036 -bfl: Set local part for filter testing
2037 -bfp: Set prefix for filter testing
2038 -bfs: Set suffix for filter testing
2041 else if (*argrest
== 'f')
2043 if (*(++argrest
) == 0)
2045 filter_test
|= checking
= FTEST_USER
;
2046 if (++i
< argc
) filter_test_ufile
= argv
[i
]; else
2048 fprintf(stderr
, "exim: file name expected after %s\n", argv
[i
-1]);
2056 fprintf(stderr
, "exim: string expected after %s\n", arg
);
2059 if (Ustrcmp(argrest
, "d") == 0) ftest_domain
= argv
[i
];
2060 else if (Ustrcmp(argrest
, "l") == 0) ftest_localpart
= argv
[i
];
2061 else if (Ustrcmp(argrest
, "p") == 0) ftest_prefix
= argv
[i
];
2062 else if (Ustrcmp(argrest
, "s") == 0) ftest_suffix
= argv
[i
];
2063 else { badarg
= TRUE
; break; }
2067 /* -bh: Host checking - an IP address must follow. */
2069 else if (Ustrcmp(argrest
, "h") == 0 || Ustrcmp(argrest
, "hc") == 0)
2071 if (++i
>= argc
) { badarg
= TRUE
; break; }
2072 sender_host_address
= argv
[i
];
2073 host_checking
= checking
= log_testing_mode
= TRUE
;
2074 host_checking_callout
= argrest
[1] == 'c';
2075 message_logs
= FALSE
;
2078 /* -bi: This option is used by sendmail to initialize *the* alias file,
2079 though it has the -oA option to specify a different file. Exim has no
2080 concept of *the* alias file, but since Sun's YP make script calls
2081 sendmail this way, some support must be provided. */
2083 else if (Ustrcmp(argrest
, "i") == 0) bi_option
= TRUE
;
2085 /* -bI: provide information, of the type to follow after a colon.
2086 This is an Exim flag. */
2088 else if (argrest
[0] == 'I' && Ustrlen(argrest
) >= 2 && argrest
[1] == ':')
2090 uschar
*p
= &argrest
[2];
2091 info_flag
= CMDINFO_HELP
;
2094 if (strcmpic(p
, CUS
"sieve") == 0)
2096 info_flag
= CMDINFO_SIEVE
;
2099 else if (strcmpic(p
, CUS
"dscp") == 0)
2101 info_flag
= CMDINFO_DSCP
;
2104 else if (strcmpic(p
, CUS
"help") == 0)
2111 /* -bm: Accept and deliver message - the default option. Reinstate
2112 receiving_message, which got turned off for all -b options. */
2114 else if (Ustrcmp(argrest
, "m") == 0) receiving_message
= TRUE
;
2116 /* -bmalware: test the filename given for malware */
2118 else if (Ustrcmp(argrest
, "malware") == 0)
2120 if (++i
>= argc
) { badarg
= TRUE
; break; }
2122 malware_test_file
= argv
[i
];
2125 /* -bnq: For locally originating messages, do not qualify unqualified
2126 addresses. In the envelope, this causes errors; in header lines they
2129 else if (Ustrcmp(argrest
, "nq") == 0)
2131 allow_unqualified_sender
= FALSE
;
2132 allow_unqualified_recipient
= FALSE
;
2135 /* -bpxx: List the contents of the mail queue, in various forms. If
2136 the option is -bpc, just a queue count is needed. Otherwise, if the
2137 first letter after p is r, then order is random. */
2139 else if (*argrest
== 'p')
2141 if (*(++argrest
) == 'c')
2144 if (*(++argrest
) != 0) badarg
= TRUE
;
2148 if (*argrest
== 'r')
2150 list_queue_option
= 8;
2153 else list_queue_option
= 0;
2157 /* -bp: List the contents of the mail queue, top-level only */
2159 if (*argrest
== 0) {}
2161 /* -bpu: List the contents of the mail queue, top-level undelivered */
2163 else if (Ustrcmp(argrest
, "u") == 0) list_queue_option
+= 1;
2165 /* -bpa: List the contents of the mail queue, including all delivered */
2167 else if (Ustrcmp(argrest
, "a") == 0) list_queue_option
+= 2;
2169 /* Unknown after -bp[r] */
2179 /* -bP: List the configuration variables given as the address list.
2180 Force -v, so configuration errors get displayed. */
2182 else if (Ustrcmp(argrest
, "P") == 0)
2184 /* -bP config: we need to setup here, because later,
2185 * when list_options is checked, the config is read already */
2186 if (argv
[i
+1] && Ustrcmp(argv
[i
+1], "config") == 0)
2189 readconf_save_config(version_string
);
2193 list_options
= TRUE
;
2194 debug_selector
|= D_v
;
2195 debug_file
= stderr
;
2199 /* -brt: Test retry configuration lookup */
2201 else if (Ustrcmp(argrest
, "rt") == 0)
2204 test_retry_arg
= i
+ 1;
2208 /* -brw: Test rewrite configuration */
2210 else if (Ustrcmp(argrest
, "rw") == 0)
2213 test_rewrite_arg
= i
+ 1;
2217 /* -bS: Read SMTP commands on standard input, but produce no replies -
2218 all errors are reported by sending messages. */
2220 else if (Ustrcmp(argrest
, "S") == 0)
2221 smtp_input
= smtp_batched_input
= receiving_message
= TRUE
;
2223 /* -bs: Read SMTP commands on standard input and produce SMTP replies
2224 on standard output. */
2226 else if (Ustrcmp(argrest
, "s") == 0) smtp_input
= receiving_message
= TRUE
;
2228 /* -bt: address testing mode */
2230 else if (Ustrcmp(argrest
, "t") == 0)
2231 address_test_mode
= checking
= log_testing_mode
= TRUE
;
2233 /* -bv: verify addresses */
2235 else if (Ustrcmp(argrest
, "v") == 0)
2236 verify_address_mode
= checking
= log_testing_mode
= TRUE
;
2238 /* -bvs: verify sender addresses */
2240 else if (Ustrcmp(argrest
, "vs") == 0)
2242 verify_address_mode
= checking
= log_testing_mode
= TRUE
;
2243 verify_as_sender
= TRUE
;
2246 /* -bV: Print version string and support details */
2248 else if (Ustrcmp(argrest
, "V") == 0)
2250 printf("Exim version %s #%s built %s\n", version_string
,
2251 version_cnumber
, version_date
);
2252 printf("%s\n", CS version_copyright
);
2253 version_printed
= TRUE
;
2254 show_whats_supported(stdout
);
2255 log_testing_mode
= TRUE
;
2258 /* -bw: inetd wait mode, accept a listening socket as stdin */
2260 else if (*argrest
== 'w')
2262 inetd_wait_mode
= TRUE
;
2263 background_daemon
= FALSE
;
2264 daemon_listen
= TRUE
;
2265 if (*(++argrest
) != '\0')
2267 inetd_wait_timeout
= readconf_readtime(argrest
, 0, FALSE
);
2268 if (inetd_wait_timeout
<= 0)
2270 fprintf(stderr
, "exim: bad time value %s: abandoned\n", argv
[i
]);
2280 /* -C: change configuration file list; ignore if it isn't really
2281 a change! Enforce a prefix check if required. */
2286 if(++i
< argc
) argrest
= argv
[i
]; else
2287 { badarg
= TRUE
; break; }
2289 if (Ustrcmp(config_main_filelist
, argrest
) != 0)
2291 #ifdef ALT_CONFIG_PREFIX
2293 int len
= Ustrlen(ALT_CONFIG_PREFIX
);
2294 uschar
*list
= argrest
;
2296 while((filename
= string_nextinlist(&list
, &sep
, big_buffer
,
2297 big_buffer_size
)) != NULL
)
2299 if ((Ustrlen(filename
) < len
||
2300 Ustrncmp(filename
, ALT_CONFIG_PREFIX
, len
) != 0 ||
2301 Ustrstr(filename
, "/../") != NULL
) &&
2302 (Ustrcmp(filename
, "/dev/null") != 0 || real_uid
!= root_uid
))
2304 fprintf(stderr
, "-C Permission denied\n");
2309 if (real_uid
!= root_uid
)
2311 #ifdef TRUSTED_CONFIG_LIST
2313 if (real_uid
!= exim_uid
2314 #ifdef CONFIGURE_OWNER
2315 && real_uid
!= config_uid
2318 trusted_config
= FALSE
;
2321 FILE *trust_list
= Ufopen(TRUSTED_CONFIG_LIST
, "rb");
2324 struct stat statbuf
;
2326 if (fstat(fileno(trust_list
), &statbuf
) != 0 ||
2327 (statbuf
.st_uid
!= root_uid
/* owner not root */
2328 #ifdef CONFIGURE_OWNER
2329 && statbuf
.st_uid
!= config_uid
/* owner not the special one */
2332 (statbuf
.st_gid
!= root_gid
/* group not root */
2333 #ifdef CONFIGURE_GROUP
2334 && statbuf
.st_gid
!= config_gid
/* group not the special one */
2336 && (statbuf
.st_mode
& 020) != 0 /* group writeable */
2338 (statbuf
.st_mode
& 2) != 0) /* world writeable */
2340 trusted_config
= FALSE
;
2345 /* Well, the trust list at least is up to scratch... */
2346 void *reset_point
= store_get(0);
2347 uschar
*trusted_configs
[32];
2351 while (Ufgets(big_buffer
, big_buffer_size
, trust_list
))
2353 uschar
*start
= big_buffer
, *nl
;
2354 while (*start
&& isspace(*start
))
2358 nl
= Ustrchr(start
, '\n');
2361 trusted_configs
[nr_configs
++] = string_copy(start
);
2362 if (nr_configs
== 32)
2370 const uschar
*list
= argrest
;
2372 while (trusted_config
&& (filename
= string_nextinlist(&list
,
2373 &sep
, big_buffer
, big_buffer_size
)) != NULL
)
2375 for (i
=0; i
< nr_configs
; i
++)
2377 if (Ustrcmp(filename
, trusted_configs
[i
]) == 0)
2380 if (i
== nr_configs
)
2382 trusted_config
= FALSE
;
2386 store_reset(reset_point
);
2390 /* No valid prefixes found in trust_list file. */
2391 trusted_config
= FALSE
;
2397 /* Could not open trust_list file. */
2398 trusted_config
= FALSE
;
2402 /* Not root; don't trust config */
2403 trusted_config
= FALSE
;
2407 config_main_filelist
= argrest
;
2408 config_changed
= TRUE
;
2413 /* -D: set up a macro definition */
2416 #ifdef DISABLE_D_OPTION
2417 fprintf(stderr
, "exim: -D is not available in this Exim binary\n");
2424 uschar
*s
= argrest
;
2427 while (isspace(*s
)) s
++;
2429 if (*s
< 'A' || *s
> 'Z')
2431 fprintf(stderr
, "exim: macro name set by -D must start with "
2432 "an upper case letter\n");
2436 while (isalnum(*s
) || *s
== '_')
2438 if (ptr
< sizeof(name
)-1) name
[ptr
++] = *s
;
2442 if (ptr
== 0) { badarg
= TRUE
; break; }
2443 while (isspace(*s
)) s
++;
2446 if (*s
++ != '=') { badarg
= TRUE
; break; }
2447 while (isspace(*s
)) s
++;
2450 for (m
= macros
; m
; m
= m
->next
)
2451 if (Ustrcmp(m
->name
, name
) == 0)
2453 fprintf(stderr
, "exim: duplicated -D in command line\n");
2457 m
= macro_create(name
, s
, TRUE
, FALSE
);
2459 if (clmacro_count
>= MAX_CLMACROS
)
2461 fprintf(stderr
, "exim: too many -D options on command line\n");
2464 clmacros
[clmacro_count
++] = string_sprintf("-D%s=%s", m
->name
,
2470 /* -d: Set debug level (see also -v below) or set the drop_cr option.
2471 The latter is now a no-op, retained for compatibility only. If -dd is used,
2472 debugging subprocesses of the daemon is disabled. */
2475 if (Ustrcmp(argrest
, "ropcr") == 0)
2477 /* drop_cr = TRUE; */
2480 /* Use an intermediate variable so that we don't set debugging while
2481 decoding the debugging bits. */
2485 unsigned int selector
= D_default
;
2488 if (*argrest
== 'd')
2490 debug_daemon
= TRUE
;
2494 decode_bits(&selector
, 1, debug_notall
, argrest
,
2495 debug_options
, debug_options_count
, US
"debug", 0);
2496 debug_selector
= selector
;
2501 /* -E: This is a local error message. This option is not intended for
2502 external use at all, but is not restricted to trusted callers because it
2503 does no harm (just suppresses certain error messages) and if Exim is run
2504 not setuid root it won't always be trusted when it generates error
2505 messages using this option. If there is a message id following -E, point
2506 message_reference at it, for logging. */
2509 local_error_message
= TRUE
;
2510 if (mac_ismsgid(argrest
)) message_reference
= argrest
;
2514 /* -ex: The vacation program calls sendmail with the undocumented "-eq"
2515 option, so it looks as if historically the -oex options are also callable
2516 without the leading -o. So we have to accept them. Before the switch,
2517 anything starting -oe has been converted to -e. Exim does not support all
2518 of the sendmail error options. */
2521 if (Ustrcmp(argrest
, "e") == 0)
2523 arg_error_handling
= ERRORS_SENDER
;
2524 errors_sender_rc
= EXIT_SUCCESS
;
2526 else if (Ustrcmp(argrest
, "m") == 0) arg_error_handling
= ERRORS_SENDER
;
2527 else if (Ustrcmp(argrest
, "p") == 0) arg_error_handling
= ERRORS_STDERR
;
2528 else if (Ustrcmp(argrest
, "q") == 0) arg_error_handling
= ERRORS_STDERR
;
2529 else if (Ustrcmp(argrest
, "w") == 0) arg_error_handling
= ERRORS_SENDER
;
2534 /* -F: Set sender's full name, used instead of the gecos entry from
2535 the password file. Since users can usually alter their gecos entries,
2536 there's no security involved in using this instead. The data can follow
2537 the -F or be in the next argument. */
2542 if(++i
< argc
) argrest
= argv
[i
]; else
2543 { badarg
= TRUE
; break; }
2545 originator_name
= argrest
;
2546 sender_name_forced
= TRUE
;
2550 /* -f: Set sender's address - this value is only actually used if Exim is
2551 run by a trusted user, or if untrusted_set_sender is set and matches the
2552 address, except that the null address can always be set by any user. The
2553 test for this happens later, when the value given here is ignored when not
2554 permitted. For an untrusted user, the actual sender is still put in Sender:
2555 if it doesn't match the From: header (unless no_local_from_check is set).
2556 The data can follow the -f or be in the next argument. The -r switch is an
2557 obsolete form of -f but since there appear to be programs out there that
2558 use anything that sendmail has ever supported, better accept it - the
2559 synonymizing is done before the switch above.
2561 At this stage, we must allow domain literal addresses, because we don't
2562 know what the setting of allow_domain_literals is yet. Ditto for trailing
2563 dots and strip_trailing_dot. */
2567 int dummy_start
, dummy_end
;
2571 if (i
+1 < argc
) argrest
= argv
[++i
]; else
2572 { badarg
= TRUE
; break; }
2575 sender_address
= string_sprintf(""); /* Ensure writeable memory */
2578 uschar
*temp
= argrest
+ Ustrlen(argrest
) - 1;
2579 while (temp
>= argrest
&& isspace(*temp
)) temp
--;
2580 if (temp
>= argrest
&& *temp
== '.') f_end_dot
= TRUE
;
2581 allow_domain_literals
= TRUE
;
2582 strip_trailing_dot
= TRUE
;
2584 allow_utf8_domains
= TRUE
;
2586 sender_address
= parse_extract_address(argrest
, &errmess
,
2587 &dummy_start
, &dummy_end
, &sender_address_domain
, TRUE
);
2589 message_smtputf8
= string_is_utf8(sender_address
);
2590 allow_utf8_domains
= FALSE
;
2592 allow_domain_literals
= FALSE
;
2593 strip_trailing_dot
= FALSE
;
2594 if (sender_address
== NULL
)
2596 fprintf(stderr
, "exim: bad -f address \"%s\": %s\n", argrest
, errmess
);
2597 return EXIT_FAILURE
;
2600 sender_address_forced
= TRUE
;
2604 /* -G: sendmail invocation to specify that it's a gateway submission and
2605 sendmail may complain about problems instead of fixing them.
2606 We make it equivalent to an ACL "control = suppress_local_fixups" and do
2607 not at this time complain about problems. */
2613 /* -h: Set the hop count for an incoming message. Exim does not currently
2614 support this; it always computes it by counting the Received: headers.
2615 To put it in will require a change to the spool header file format. */
2620 if(++i
< argc
) argrest
= argv
[i
]; else
2621 { badarg
= TRUE
; break; }
2623 if (!isdigit(*argrest
)) badarg
= TRUE
;
2627 /* -i: Set flag so dot doesn't end non-SMTP input (same as -oi, seems
2628 not to be documented for sendmail but mailx (at least) uses it) */
2631 if (*argrest
== 0) dot_ends
= FALSE
; else badarg
= TRUE
;
2635 /* -L: set the identifier used for syslog; equivalent to setting
2636 syslog_processname in the config file, but needs to be an admin option. */
2639 if (*argrest
== '\0')
2641 if(++i
< argc
) argrest
= argv
[i
]; else
2642 { badarg
= TRUE
; break; }
2644 sz
= Ustrlen(argrest
);
2647 fprintf(stderr
, "exim: the -L syslog name is too long: \"%s\"\n", argrest
);
2648 return EXIT_FAILURE
;
2652 fprintf(stderr
, "exim: the -L syslog name is too short\n");
2653 return EXIT_FAILURE
;
2655 cmdline_syslog_name
= argrest
;
2659 receiving_message
= FALSE
;
2661 /* -MC: continue delivery of another message via an existing open
2662 file descriptor. This option is used for an internal call by the
2663 smtp transport when there is a pending message waiting to go to an
2664 address to which it has got a connection. Five subsequent arguments are
2665 required: transport name, host name, IP address, sequence number, and
2666 message_id. Transports may decline to create new processes if the sequence
2667 number gets too big. The channel is stdin. This (-MC) must be the last
2668 argument. There's a subsequent check that the real-uid is privileged.
2670 If we are running in the test harness. delay for a bit, to let the process
2671 that set this one up complete. This makes for repeatability of the logging,
2674 if (Ustrcmp(argrest
, "C") == 0)
2676 union sockaddr_46 interface_sock
;
2677 EXIM_SOCKLEN_T size
= sizeof(interface_sock
);
2681 fprintf(stderr
, "exim: too many or too few arguments after -MC\n");
2682 return EXIT_FAILURE
;
2685 if (msg_action_arg
>= 0)
2687 fprintf(stderr
, "exim: incompatible arguments\n");
2688 return EXIT_FAILURE
;
2691 continue_transport
= argv
[++i
];
2692 continue_hostname
= argv
[++i
];
2693 continue_host_address
= argv
[++i
];
2694 continue_sequence
= Uatoi(argv
[++i
]);
2695 msg_action
= MSG_DELIVER
;
2696 msg_action_arg
= ++i
;
2697 forced_delivery
= TRUE
;
2698 queue_run_pid
= passed_qr_pid
;
2699 queue_run_pipe
= passed_qr_pipe
;
2701 if (!mac_ismsgid(argv
[i
]))
2703 fprintf(stderr
, "exim: malformed message id %s after -MC option\n",
2705 return EXIT_FAILURE
;
2708 /* Set up $sending_ip_address and $sending_port */
2710 if (getsockname(fileno(stdin
), (struct sockaddr
*)(&interface_sock
),
2712 sending_ip_address
= host_ntoa(-1, &interface_sock
, NULL
,
2716 fprintf(stderr
, "exim: getsockname() failed after -MC option: %s\n",
2718 return EXIT_FAILURE
;
2721 if (running_in_test_harness
) millisleep(500);
2725 else if (*argrest
== 'C' && argrest
[1] && !argrest
[2])
2729 /* -MCA: set the smtp_authenticated flag; this is useful only when it
2730 precedes -MC (see above). The flag indicates that the host to which
2731 Exim is connected has accepted an AUTH sequence. */
2733 case 'A': smtp_authenticated
= TRUE
; break;
2735 /* -MCD: set the smtp_use_dsn flag; this indicates that the host
2736 that exim is connected to supports the esmtp extension DSN */
2738 case 'D': smtp_peer_options
|= PEER_OFFERED_DSN
; break;
2740 /* -MCG: set the queue name, to a non-default value */
2742 case 'G': if (++i
< argc
) queue_name
= string_copy(argv
[i
]);
2746 /* -MCK: the peer offered CHUNKING. Must precede -MC */
2748 case 'K': smtp_peer_options
|= PEER_OFFERED_CHUNKING
; break;
2750 /* -MCP: set the smtp_use_pipelining flag; this is useful only when
2751 it preceded -MC (see above) */
2753 case 'P': smtp_peer_options
|= PEER_OFFERED_PIPE
; break;
2755 /* -MCQ: pass on the pid of the queue-running process that started
2756 this chain of deliveries and the fd of its synchronizing pipe; this
2757 is useful only when it precedes -MC (see above) */
2759 case 'Q': if (++i
< argc
) passed_qr_pid
= (pid_t
)(Uatol(argv
[i
]));
2761 if (++i
< argc
) passed_qr_pipe
= (int)(Uatol(argv
[i
]));
2765 /* -MCS: set the smtp_use_size flag; this is useful only when it
2766 precedes -MC (see above) */
2768 case 'S': smtp_peer_options
|= PEER_OFFERED_SIZE
; break;
2771 /* -MCT: set the tls_offered flag; this is useful only when it
2772 precedes -MC (see above). The flag indicates that the host to which
2773 Exim is connected has offered TLS support. */
2775 case 'T': smtp_peer_options
|= PEER_OFFERED_TLS
; break;
2778 default: badarg
= TRUE
; break;
2783 /* -M[x]: various operations on the following list of message ids:
2784 -M deliver the messages, ignoring next retry times and thawing
2785 -Mc deliver the messages, checking next retry times, no thawing
2786 -Mf freeze the messages
2787 -Mg give up on the messages
2788 -Mt thaw the messages
2789 -Mrm remove the messages
2790 In the above cases, this must be the last option. There are also the
2791 following options which are followed by a single message id, and which
2792 act on that message. Some of them use the "recipient" addresses as well.
2793 -Mar add recipient(s)
2794 -Mmad mark all recipients delivered
2795 -Mmd mark recipients(s) delivered
2797 -Mset load a message for use with -be
2799 -Mvc show copy (of whole message, in RFC 2822 format)
2804 else if (*argrest
== 0)
2806 msg_action
= MSG_DELIVER
;
2807 forced_delivery
= deliver_force_thaw
= TRUE
;
2809 else if (Ustrcmp(argrest
, "ar") == 0)
2811 msg_action
= MSG_ADD_RECIPIENT
;
2812 one_msg_action
= TRUE
;
2814 else if (Ustrcmp(argrest
, "c") == 0) msg_action
= MSG_DELIVER
;
2815 else if (Ustrcmp(argrest
, "es") == 0)
2817 msg_action
= MSG_EDIT_SENDER
;
2818 one_msg_action
= TRUE
;
2820 else if (Ustrcmp(argrest
, "f") == 0) msg_action
= MSG_FREEZE
;
2821 else if (Ustrcmp(argrest
, "g") == 0)
2823 msg_action
= MSG_DELIVER
;
2824 deliver_give_up
= TRUE
;
2826 else if (Ustrcmp(argrest
, "mad") == 0)
2828 msg_action
= MSG_MARK_ALL_DELIVERED
;
2830 else if (Ustrcmp(argrest
, "md") == 0)
2832 msg_action
= MSG_MARK_DELIVERED
;
2833 one_msg_action
= TRUE
;
2835 else if (Ustrcmp(argrest
, "rm") == 0) msg_action
= MSG_REMOVE
;
2836 else if (Ustrcmp(argrest
, "set") == 0)
2838 msg_action
= MSG_LOAD
;
2839 one_msg_action
= TRUE
;
2841 else if (Ustrcmp(argrest
, "t") == 0) msg_action
= MSG_THAW
;
2842 else if (Ustrcmp(argrest
, "vb") == 0)
2844 msg_action
= MSG_SHOW_BODY
;
2845 one_msg_action
= TRUE
;
2847 else if (Ustrcmp(argrest
, "vc") == 0)
2849 msg_action
= MSG_SHOW_COPY
;
2850 one_msg_action
= TRUE
;
2852 else if (Ustrcmp(argrest
, "vh") == 0)
2854 msg_action
= MSG_SHOW_HEADER
;
2855 one_msg_action
= TRUE
;
2857 else if (Ustrcmp(argrest
, "vl") == 0)
2859 msg_action
= MSG_SHOW_LOG
;
2860 one_msg_action
= TRUE
;
2862 else { badarg
= TRUE
; break; }
2864 /* All the -Mxx options require at least one message id. */
2866 msg_action_arg
= i
+ 1;
2867 if (msg_action_arg
>= argc
)
2869 fprintf(stderr
, "exim: no message ids given after %s option\n", arg
);
2870 return EXIT_FAILURE
;
2873 /* Some require only message ids to follow */
2875 if (!one_msg_action
)
2878 for (j
= msg_action_arg
; j
< argc
; j
++) if (!mac_ismsgid(argv
[j
]))
2880 fprintf(stderr
, "exim: malformed message id %s after %s option\n",
2882 return EXIT_FAILURE
;
2884 goto END_ARG
; /* Remaining args are ids */
2887 /* Others require only one message id, possibly followed by addresses,
2888 which will be handled as normal arguments. */
2892 if (!mac_ismsgid(argv
[msg_action_arg
]))
2894 fprintf(stderr
, "exim: malformed message id %s after %s option\n",
2895 argv
[msg_action_arg
], arg
);
2896 return EXIT_FAILURE
;
2903 /* Some programs seem to call the -om option without the leading o;
2904 for sendmail it askes for "me too". Exim always does this. */
2907 if (*argrest
!= 0) badarg
= TRUE
;
2911 /* -N: don't do delivery - a debugging option that stops transports doing
2912 their thing. It implies debugging at the D_v level. */
2917 dont_deliver
= TRUE
;
2918 debug_selector
|= D_v
;
2919 debug_file
= stderr
;
2925 /* -n: This means "don't alias" in sendmail, apparently.
2926 For normal invocations, it has no effect.
2927 It may affect some other options. */
2933 /* -O: Just ignore it. In sendmail, apparently -O option=value means set
2934 option to the specified value. This form uses long names. We need to handle
2935 -O option=value and -Ooption=value. */
2942 fprintf(stderr
, "exim: string expected after -O\n");
2950 /* -oA: Set an argument for the bi command (sendmail's "alternate alias
2953 if (*argrest
== 'A')
2955 alias_arg
= argrest
+ 1;
2956 if (alias_arg
[0] == 0)
2958 if (i
+1 < argc
) alias_arg
= argv
[++i
]; else
2960 fprintf(stderr
, "exim: string expected after -oA\n");
2966 /* -oB: Set a connection message max value for remote deliveries */
2968 else if (*argrest
== 'B')
2970 uschar
*p
= argrest
+ 1;
2973 if (i
+1 < argc
&& isdigit((argv
[i
+1][0]))) p
= argv
[++i
]; else
2975 connection_max_messages
= 1;
2984 fprintf(stderr
, "exim: number expected after -oB\n");
2987 connection_max_messages
= Uatoi(p
);
2991 /* -odb: background delivery */
2993 else if (Ustrcmp(argrest
, "db") == 0)
2995 synchronous_delivery
= FALSE
;
2996 arg_queue_only
= FALSE
;
2997 queue_only_set
= TRUE
;
3000 /* -odf: foreground delivery (smail-compatible option); same effect as
3001 -odi: interactive (synchronous) delivery (sendmail-compatible option)
3004 else if (Ustrcmp(argrest
, "df") == 0 || Ustrcmp(argrest
, "di") == 0)
3006 synchronous_delivery
= TRUE
;
3007 arg_queue_only
= FALSE
;
3008 queue_only_set
= TRUE
;
3011 /* -odq: queue only */
3013 else if (Ustrcmp(argrest
, "dq") == 0)
3015 synchronous_delivery
= FALSE
;
3016 arg_queue_only
= TRUE
;
3017 queue_only_set
= TRUE
;
3020 /* -odqs: queue SMTP only - do local deliveries and remote routing,
3021 but no remote delivery */
3023 else if (Ustrcmp(argrest
, "dqs") == 0)
3026 arg_queue_only
= FALSE
;
3027 queue_only_set
= TRUE
;
3030 /* -oex: Sendmail error flags. As these are also accepted without the
3031 leading -o prefix, for compatibility with vacation and other callers,
3032 they are handled with -e above. */
3034 /* -oi: Set flag so dot doesn't end non-SMTP input (same as -i)
3035 -oitrue: Another sendmail syntax for the same */
3037 else if (Ustrcmp(argrest
, "i") == 0 ||
3038 Ustrcmp(argrest
, "itrue") == 0)
3041 /* -oM*: Set various characteristics for an incoming message; actually
3042 acted on for trusted callers only. */
3044 else if (*argrest
== 'M')
3048 fprintf(stderr
, "exim: data expected after -o%s\n", argrest
);
3052 /* -oMa: Set sender host address */
3054 if (Ustrcmp(argrest
, "Ma") == 0) sender_host_address
= argv
[++i
];
3056 /* -oMaa: Set authenticator name */
3058 else if (Ustrcmp(argrest
, "Maa") == 0)
3059 sender_host_authenticated
= argv
[++i
];
3061 /* -oMas: setting authenticated sender */
3063 else if (Ustrcmp(argrest
, "Mas") == 0) authenticated_sender
= argv
[++i
];
3065 /* -oMai: setting authenticated id */
3067 else if (Ustrcmp(argrest
, "Mai") == 0) authenticated_id
= argv
[++i
];
3069 /* -oMi: Set incoming interface address */
3071 else if (Ustrcmp(argrest
, "Mi") == 0) interface_address
= argv
[++i
];
3073 /* -oMm: Message reference */
3075 else if (Ustrcmp(argrest
, "Mm") == 0)
3077 if (!mac_ismsgid(argv
[i
+1]))
3079 fprintf(stderr
,"-oMm must be a valid message ID\n");
3082 if (!trusted_config
)
3084 fprintf(stderr
,"-oMm must be called by a trusted user/config\n");
3087 message_reference
= argv
[++i
];
3090 /* -oMr: Received protocol */
3092 else if (Ustrcmp(argrest
, "Mr") == 0) received_protocol
= argv
[++i
];
3094 /* -oMs: Set sender host name */
3096 else if (Ustrcmp(argrest
, "Ms") == 0) sender_host_name
= argv
[++i
];
3098 /* -oMt: Set sender ident */
3100 else if (Ustrcmp(argrest
, "Mt") == 0)
3102 sender_ident_set
= TRUE
;
3103 sender_ident
= argv
[++i
];
3106 /* Else a bad argument */
3115 /* -om: Me-too flag for aliases. Exim always does this. Some programs
3116 seem to call this as -m (undocumented), so that is also accepted (see
3119 else if (Ustrcmp(argrest
, "m") == 0) {}
3121 /* -oo: An ancient flag for old-style addresses which still seems to
3122 crop up in some calls (see in SCO). */
3124 else if (Ustrcmp(argrest
, "o") == 0) {}
3126 /* -oP <name>: set pid file path for daemon */
3128 else if (Ustrcmp(argrest
, "P") == 0)
3129 override_pid_file_path
= argv
[++i
];
3131 /* -or <n>: set timeout for non-SMTP acceptance
3132 -os <n>: set timeout for SMTP acceptance */
3134 else if (*argrest
== 'r' || *argrest
== 's')
3136 int *tp
= (*argrest
== 'r')?
3137 &arg_receive_timeout
: &arg_smtp_receive_timeout
;
3138 if (argrest
[1] == 0)
3140 if (i
+1 < argc
) *tp
= readconf_readtime(argv
[++i
], 0, FALSE
);
3142 else *tp
= readconf_readtime(argrest
+ 1, 0, FALSE
);
3145 fprintf(stderr
, "exim: bad time value %s: abandoned\n", argv
[i
]);
3150 /* -oX <list>: Override local_interfaces and/or default daemon ports */
3152 else if (Ustrcmp(argrest
, "X") == 0)
3153 override_local_interfaces
= argv
[++i
];
3155 /* Unknown -o argument */
3161 /* -ps: force Perl startup; -pd force delayed Perl startup */
3165 if (*argrest
== 's' && argrest
[1] == 0)
3167 perl_start_option
= 1;
3170 if (*argrest
== 'd' && argrest
[1] == 0)
3172 perl_start_option
= -1;
3177 /* -panythingelse is taken as the Sendmail-compatible argument -prval:sval,
3178 which sets the host protocol and host name */
3182 if (i
+1 < argc
) argrest
= argv
[++i
]; else
3183 { badarg
= TRUE
; break; }
3188 uschar
*hn
= Ustrchr(argrest
, ':');
3191 received_protocol
= argrest
;
3195 received_protocol
= string_copyn(argrest
, hn
- argrest
);
3196 sender_host_name
= hn
+ 1;
3203 receiving_message
= FALSE
;
3204 if (queue_interval
>= 0)
3206 fprintf(stderr
, "exim: -q specified more than once\n");
3210 /* -qq...: Do queue runs in a 2-stage manner */
3212 if (*argrest
== 'q')
3214 queue_2stage
= TRUE
;
3218 /* -qi...: Do only first (initial) deliveries */
3220 if (*argrest
== 'i')
3222 queue_run_first_delivery
= TRUE
;
3226 /* -qf...: Run the queue, forcing deliveries
3227 -qff..: Ditto, forcing thawing as well */
3229 if (*argrest
== 'f')
3231 queue_run_force
= TRUE
;
3232 if (*++argrest
== 'f')
3234 deliver_force_thaw
= TRUE
;
3239 /* -q[f][f]l...: Run the queue only on local deliveries */
3241 if (*argrest
== 'l')
3243 queue_run_local
= TRUE
;
3247 /* -q[f][f][l][G<name>]... Work on the named queue */
3249 if (*argrest
== 'G')
3252 for (argrest
++, i
= 0; argrest
[i
] && argrest
[i
] != '/'; ) i
++;
3253 queue_name
= string_copyn(argrest
, i
);
3255 if (*argrest
== '/') argrest
++;
3258 /* -q[f][f][l][G<name>]: Run the queue, optionally forced, optionally local
3259 only, optionally named, optionally starting from a given message id. */
3261 if (*argrest
== 0 &&
3262 (i
+ 1 >= argc
|| argv
[i
+1][0] == '-' || mac_ismsgid(argv
[i
+1])))
3265 if (i
+1 < argc
&& mac_ismsgid(argv
[i
+1]))
3266 start_queue_run_id
= argv
[++i
];
3267 if (i
+1 < argc
&& mac_ismsgid(argv
[i
+1]))
3268 stop_queue_run_id
= argv
[++i
];
3271 /* -q[f][f][l][G<name>/]<n>: Run the queue at regular intervals, optionally
3272 forced, optionally local only, optionally named. */
3274 else if ((queue_interval
= readconf_readtime(*argrest
? argrest
: argv
[++i
],
3277 fprintf(stderr
, "exim: bad time value %s: abandoned\n", argv
[i
]);
3283 case 'R': /* Synonymous with -qR... */
3284 receiving_message
= FALSE
;
3286 /* -Rf: As -R (below) but force all deliveries,
3287 -Rff: Ditto, but also thaw all frozen messages,
3288 -Rr: String is regex
3289 -Rrf: Regex and force
3290 -Rrff: Regex and force and thaw
3292 in all cases provided there are no further characters in this
3298 for (i
= 0; i
< nelem(rsopts
); i
++)
3299 if (Ustrcmp(argrest
, rsopts
[i
]) == 0)
3301 if (i
!= 2) queue_run_force
= TRUE
;
3302 if (i
>= 2) deliver_selectstring_regex
= TRUE
;
3303 if (i
== 1 || i
== 4) deliver_force_thaw
= TRUE
;
3304 argrest
+= Ustrlen(rsopts
[i
]);
3308 /* -R: Set string to match in addresses for forced queue run to
3309 pick out particular messages. */
3312 deliver_selectstring
= argrest
;
3313 else if (i
+1 < argc
)
3314 deliver_selectstring
= argv
[++i
];
3317 fprintf(stderr
, "exim: string expected after -R\n");
3323 /* -r: an obsolete synonym for -f (see above) */
3326 /* -S: Like -R but works on sender. */
3328 case 'S': /* Synonymous with -qS... */
3329 receiving_message
= FALSE
;
3331 /* -Sf: As -S (below) but force all deliveries,
3332 -Sff: Ditto, but also thaw all frozen messages,
3333 -Sr: String is regex
3334 -Srf: Regex and force
3335 -Srff: Regex and force and thaw
3337 in all cases provided there are no further characters in this
3343 for (i
= 0; i
< nelem(rsopts
); i
++)
3344 if (Ustrcmp(argrest
, rsopts
[i
]) == 0)
3346 if (i
!= 2) queue_run_force
= TRUE
;
3347 if (i
>= 2) deliver_selectstring_sender_regex
= TRUE
;
3348 if (i
== 1 || i
== 4) deliver_force_thaw
= TRUE
;
3349 argrest
+= Ustrlen(rsopts
[i
]);
3353 /* -S: Set string to match in addresses for forced queue run to
3354 pick out particular messages. */
3357 deliver_selectstring_sender
= argrest
;
3358 else if (i
+1 < argc
)
3359 deliver_selectstring_sender
= argv
[++i
];
3362 fprintf(stderr
, "exim: string expected after -S\n");
3367 /* -Tqt is an option that is exclusively for use by the testing suite.
3368 It is not recognized in other circumstances. It allows for the setting up
3369 of explicit "queue times" so that various warning/retry things can be
3370 tested. Otherwise variability of clock ticks etc. cause problems. */
3373 if (running_in_test_harness
&& Ustrcmp(argrest
, "qt") == 0)
3374 fudged_queue_times
= argv
[++i
];
3379 /* -t: Set flag to extract recipients from body of message. */
3382 if (*argrest
== 0) extract_recipients
= TRUE
;
3384 /* -ti: Set flag to extract recipients from body of message, and also
3385 specify that dot does not end the message. */
3387 else if (Ustrcmp(argrest
, "i") == 0)
3389 extract_recipients
= TRUE
;
3393 /* -tls-on-connect: don't wait for STARTTLS (for old clients) */
3396 else if (Ustrcmp(argrest
, "ls-on-connect") == 0) tls_in
.on_connect
= TRUE
;
3403 /* -U: This means "initial user submission" in sendmail, apparently. The
3404 doc claims that in future sendmail may refuse syntactically invalid
3405 messages instead of fixing them. For the moment, we just ignore it. */
3411 /* -v: verify things - this is a very low-level debugging */
3416 debug_selector
|= D_v
;
3417 debug_file
= stderr
;
3423 /* -x: AIX uses this to indicate some fancy 8-bit character stuff:
3425 The -x flag tells the sendmail command that mail from a local
3426 mail program has National Language Support (NLS) extended characters
3427 in the body of the mail item. The sendmail command can send mail with
3428 extended NLS characters across networks that normally corrupts these
3431 As Exim is 8-bit clean, it just ignores this flag. */
3434 if (*argrest
!= 0) badarg
= TRUE
;
3437 /* -X: in sendmail: takes one parameter, logfile, and sends debugging
3438 logs to that file. We swallow the parameter and otherwise ignore it. */
3441 if (*argrest
== '\0')
3444 fprintf(stderr
, "exim: string expected after -X\n");
3450 if (*argrest
== '\0')
3451 if (++i
< argc
) log_oneline
= argv
[i
]; else
3453 fprintf(stderr
, "exim: file name expected after %s\n", argv
[i
-1]);
3458 /* All other initial characters are errors */
3463 } /* End of high-level switch statement */
3465 /* Failed to recognize the option, or syntax error */
3469 fprintf(stderr
, "exim abandoned: unknown, malformed, or incomplete "
3470 "option %s\n", arg
);
3476 /* If -R or -S have been specified without -q, assume a single queue run. */
3478 if ( (deliver_selectstring
|| deliver_selectstring_sender
)
3479 && queue_interval
< 0)
3484 /* If usage_wanted is set we call the usage function - which never returns */
3485 if (usage_wanted
) exim_usage(called_as
);
3487 /* Arguments have been processed. Check for incompatibilities. */
3489 (smtp_input
|| extract_recipients
|| recipients_arg
< argc
) &&
3490 (daemon_listen
|| queue_interval
>= 0 || bi_option
||
3491 test_retry_arg
>= 0 || test_rewrite_arg
>= 0 ||
3492 filter_test
!= FTEST_NONE
|| (msg_action_arg
> 0 && !one_msg_action
))
3495 msg_action_arg
> 0 &&
3496 (daemon_listen
|| queue_interval
> 0 || list_options
||
3497 (checking
&& msg_action
!= MSG_LOAD
) ||
3498 bi_option
|| test_retry_arg
>= 0 || test_rewrite_arg
>= 0)
3501 (daemon_listen
|| queue_interval
> 0) &&
3502 (sender_address
!= NULL
|| list_options
|| list_queue
|| checking
||
3506 daemon_listen
&& queue_interval
== 0
3509 inetd_wait_mode
&& queue_interval
>= 0
3513 (checking
|| smtp_input
|| extract_recipients
||
3514 filter_test
!= FTEST_NONE
|| bi_option
)
3517 verify_address_mode
&&
3518 (address_test_mode
|| smtp_input
|| extract_recipients
||
3519 filter_test
!= FTEST_NONE
|| bi_option
)
3522 address_test_mode
&& (smtp_input
|| extract_recipients
||
3523 filter_test
!= FTEST_NONE
|| bi_option
)
3526 smtp_input
&& (sender_address
!= NULL
|| filter_test
!= FTEST_NONE
||
3530 deliver_selectstring
!= NULL
&& queue_interval
< 0
3533 msg_action
== MSG_LOAD
&&
3534 (!expansion_test
|| expansion_test_message
!= NULL
)
3538 fprintf(stderr
, "exim: incompatible command-line options or arguments\n");
3542 /* If debugging is set up, set the file and the file descriptor to pass on to
3543 child processes. It should, of course, be 2 for stderr. Also, force the daemon
3544 to run in the foreground. */
3546 if (debug_selector
!= 0)
3548 debug_file
= stderr
;
3549 debug_fd
= fileno(debug_file
);
3550 background_daemon
= FALSE
;
3551 if (running_in_test_harness
) millisleep(100); /* lets caller finish */
3552 if (debug_selector
!= D_v
) /* -v only doesn't show this */
3554 debug_printf("Exim version %s uid=%ld gid=%ld pid=%d D=%x\n",
3555 version_string
, (long int)real_uid
, (long int)real_gid
, (int)getpid(),
3557 if (!version_printed
)
3558 show_whats_supported(stderr
);
3562 /* When started with root privilege, ensure that the limits on the number of
3563 open files and the number of processes (where that is accessible) are
3564 sufficiently large, or are unset, in case Exim has been called from an
3565 environment where the limits are screwed down. Not all OS have the ability to
3566 change some of these limits. */
3570 DEBUG(D_any
) debug_print_ids(US
"Exim has no root privilege:");
3576 #ifdef RLIMIT_NOFILE
3577 if (getrlimit(RLIMIT_NOFILE
, &rlp
) < 0)
3579 log_write(0, LOG_MAIN
|LOG_PANIC
, "getrlimit(RLIMIT_NOFILE) failed: %s",
3581 rlp
.rlim_cur
= rlp
.rlim_max
= 0;
3584 /* I originally chose 1000 as a nice big number that was unlikely to
3585 be exceeded. It turns out that some older OS have a fixed upper limit of
3588 if (rlp
.rlim_cur
< 1000)
3590 rlp
.rlim_cur
= rlp
.rlim_max
= 1000;
3591 if (setrlimit(RLIMIT_NOFILE
, &rlp
) < 0)
3593 rlp
.rlim_cur
= rlp
.rlim_max
= 256;
3594 if (setrlimit(RLIMIT_NOFILE
, &rlp
) < 0)
3595 log_write(0, LOG_MAIN
|LOG_PANIC
, "setrlimit(RLIMIT_NOFILE) failed: %s",
3602 if (getrlimit(RLIMIT_NPROC
, &rlp
) < 0)
3604 log_write(0, LOG_MAIN
|LOG_PANIC
, "getrlimit(RLIMIT_NPROC) failed: %s",
3606 rlp
.rlim_cur
= rlp
.rlim_max
= 0;
3609 #ifdef RLIM_INFINITY
3610 if (rlp
.rlim_cur
!= RLIM_INFINITY
&& rlp
.rlim_cur
< 1000)
3612 rlp
.rlim_cur
= rlp
.rlim_max
= RLIM_INFINITY
;
3614 if (rlp
.rlim_cur
< 1000)
3616 rlp
.rlim_cur
= rlp
.rlim_max
= 1000;
3618 if (setrlimit(RLIMIT_NPROC
, &rlp
) < 0)
3619 log_write(0, LOG_MAIN
|LOG_PANIC
, "setrlimit(RLIMIT_NPROC) failed: %s",
3625 /* Exim is normally entered as root (but some special configurations are
3626 possible that don't do this). However, it always spins off sub-processes that
3627 set their uid and gid as required for local delivery. We don't want to pass on
3628 any extra groups that root may belong to, so we want to get rid of them all at
3631 We need to obey setgroups() at this stage, before possibly giving up root
3632 privilege for a changed configuration file, but later on we might need to
3633 check on the additional groups for the admin user privilege - can't do that
3634 till after reading the config, which might specify the exim gid. Therefore,
3635 save the group list here first. */
3637 group_count
= getgroups(NGROUPS_MAX
, group_list
);
3638 if (group_count
< 0)
3640 fprintf(stderr
, "exim: getgroups() failed: %s\n", strerror(errno
));
3644 /* There is a fundamental difference in some BSD systems in the matter of
3645 groups. FreeBSD and BSDI are known to be different; NetBSD and OpenBSD are
3646 known not to be different. On the "different" systems there is a single group
3647 list, and the first entry in it is the current group. On all other versions of
3648 Unix there is a supplementary group list, which is in *addition* to the current
3649 group. Consequently, to get rid of all extraneous groups on a "standard" system
3650 you pass over 0 groups to setgroups(), while on a "different" system you pass
3651 over a single group - the current group, which is always the first group in the
3652 list. Calling setgroups() with zero groups on a "different" system results in
3653 an error return. The following code should cope with both types of system.
3655 However, if this process isn't running as root, setgroups() can't be used
3656 since you have to be root to run it, even if throwing away groups. Not being
3657 root here happens only in some unusual configurations. We just ignore the
3660 if (setgroups(0, NULL
) != 0)
3662 if (setgroups(1, group_list
) != 0 && !unprivileged
)
3664 fprintf(stderr
, "exim: setgroups() failed: %s\n", strerror(errno
));
3669 /* If the configuration file name has been altered by an argument on the
3670 command line (either a new file name or a macro definition) and the caller is
3671 not root, or if this is a filter testing run, remove any setuid privilege the
3672 program has and run as the underlying user.
3674 The exim user is locked out of this, which severely restricts the use of -C
3677 Otherwise, set the real ids to the effective values (should be root unless run
3678 from inetd, which it can either be root or the exim uid, if one is configured).
3680 There is a private mechanism for bypassing some of this, in order to make it
3681 possible to test lots of configurations automatically, without having either to
3682 recompile each time, or to patch in an actual configuration file name and other
3683 values (such as the path name). If running in the test harness, pretend that
3684 configuration file changes and macro definitions haven't happened. */
3687 (!trusted_config
|| /* Config changed, or */
3688 !macros_trusted(opt_D_used
)) && /* impermissible macros and */
3689 real_uid
!= root_uid
&& /* Not root, and */
3690 !running_in_test_harness
/* Not fudged */
3692 expansion_test
/* expansion testing */
3694 filter_test
!= FTEST_NONE
) /* Filter testing */
3696 setgroups(group_count
, group_list
);
3697 exim_setugid(real_uid
, real_gid
, FALSE
,
3698 US
"-C, -D, -be or -bf forces real uid");
3699 removed_privilege
= TRUE
;
3701 /* In the normal case when Exim is called like this, stderr is available
3702 and should be used for any logging information because attempts to write
3703 to the log will usually fail. To arrange this, we unset really_exim. However,
3704 if no stderr is available there is no point - we might as well have a go
3705 at the log (if it fails, syslog will be written).
3707 Note that if the invoker is Exim, the logs remain available. Messing with
3708 this causes unlogged successful deliveries. */
3710 if ((log_stderr
!= NULL
) && (real_uid
!= exim_uid
))
3711 really_exim
= FALSE
;
3714 /* Privilege is to be retained for the moment. It may be dropped later,
3715 depending on the job that this Exim process has been asked to do. For now, set
3716 the real uid to the effective so that subsequent re-execs of Exim are done by a
3719 else exim_setugid(geteuid(), getegid(), FALSE
, US
"forcing real = effective");
3721 /* If testing a filter, open the file(s) now, before wasting time doing other
3722 setups and reading the message. */
3724 if ((filter_test
& FTEST_SYSTEM
) != 0)
3726 filter_sfd
= Uopen(filter_test_sfile
, O_RDONLY
, 0);
3729 fprintf(stderr
, "exim: failed to open %s: %s\n", filter_test_sfile
,
3731 return EXIT_FAILURE
;
3735 if ((filter_test
& FTEST_USER
) != 0)
3737 filter_ufd
= Uopen(filter_test_ufile
, O_RDONLY
, 0);
3740 fprintf(stderr
, "exim: failed to open %s: %s\n", filter_test_ufile
,
3742 return EXIT_FAILURE
;
3746 /* Initialise lookup_list
3747 If debugging, already called above via version reporting.
3748 In either case, we initialise the list of available lookups while running
3749 as root. All dynamically modules are loaded from a directory which is
3750 hard-coded into the binary and is code which, if not a module, would be
3751 part of Exim already. Ability to modify the content of the directory
3752 is equivalent to the ability to modify a setuid binary!
3754 This needs to happen before we read the main configuration. */
3758 if (running_in_test_harness
) smtputf8_advertise_hosts
= NULL
;
3761 /* Read the main runtime configuration data; this gives up if there
3762 is a failure. It leaves the configuration file open so that the subsequent
3763 configuration data for delivery can be read if needed.
3765 NOTE: immediatly after opening the configuration file we change the working
3766 directory to "/"! Later we change to $spool_directory. We do it there, because
3767 during readconf_main() some expansion takes place already. */
3769 /* Store the initial cwd before we change directories */
3770 if ((initial_cwd
= os_getcwd(NULL
, 0)) == NULL
)
3772 perror("exim: can't get the current working directory");
3777 -be[m] expansion test -
3778 -b[fF] filter test new
3780 -bmalware malware_test_file new
3782 -brw rewrite test new
3784 -bv[s] address verify -
3786 -bP <option> (except -bP config, which sets list_config)
3788 If any of these options is set, we suppress warnings about configuration
3789 issues (currently about tls_advertise_hosts and keep_environment not being
3792 readconf_main(checking
|| list_options
);
3794 /* Now in directory "/" */
3796 if (cleanup_environment() == FALSE
)
3797 log_write(0, LOG_PANIC_DIE
, "Can't cleanup environment");
3800 /* If an action on specific messages is requested, or if a daemon or queue
3801 runner is being started, we need to know if Exim was called by an admin user.
3802 This is the case if the real user is root or exim, or if the real group is
3803 exim, or if one of the supplementary groups is exim or a group listed in
3804 admin_groups. We don't fail all message actions immediately if not admin_user,
3805 since some actions can be performed by non-admin users. Instead, set admin_user
3806 for later interrogation. */
3808 if (real_uid
== root_uid
|| real_uid
== exim_uid
|| real_gid
== exim_gid
)
3813 for (i
= 0; i
< group_count
; i
++)
3815 if (group_list
[i
] == exim_gid
) admin_user
= TRUE
;
3816 else if (admin_groups
!= NULL
)
3818 for (j
= 1; j
<= (int)(admin_groups
[0]); j
++)
3819 if (admin_groups
[j
] == group_list
[i
])
3820 { admin_user
= TRUE
; break; }
3822 if (admin_user
) break;
3826 /* Another group of privileged users are the trusted users. These are root,
3827 exim, and any caller matching trusted_users or trusted_groups. Trusted callers
3828 are permitted to specify sender_addresses with -f on the command line, and
3829 other message parameters as well. */
3831 if (real_uid
== root_uid
|| real_uid
== exim_uid
)
3832 trusted_caller
= TRUE
;
3837 if (trusted_users
!= NULL
)
3839 for (i
= 1; i
<= (int)(trusted_users
[0]); i
++)
3840 if (trusted_users
[i
] == real_uid
)
3841 { trusted_caller
= TRUE
; break; }
3844 if (!trusted_caller
&& trusted_groups
!= NULL
)
3846 for (i
= 1; i
<= (int)(trusted_groups
[0]); i
++)
3848 if (trusted_groups
[i
] == real_gid
)
3849 trusted_caller
= TRUE
;
3850 else for (j
= 0; j
< group_count
; j
++)
3852 if (trusted_groups
[i
] == group_list
[j
])
3853 { trusted_caller
= TRUE
; break; }
3855 if (trusted_caller
) break;
3860 /* Handle the decoding of logging options. */
3862 decode_bits(log_selector
, log_selector_size
, log_notall
,
3863 log_selector_string
, log_options
, log_options_count
, US
"log", 0);
3868 debug_printf("configuration file is %s\n", config_main_filename
);
3869 debug_printf("log selectors =");
3870 for (i
= 0; i
< log_selector_size
; i
++)
3871 debug_printf(" %08x", log_selector
[i
]);
3875 /* If domain literals are not allowed, check the sender address that was
3876 supplied with -f. Ditto for a stripped trailing dot. */
3878 if (sender_address
!= NULL
)
3880 if (sender_address
[sender_address_domain
] == '[' && !allow_domain_literals
)
3882 fprintf(stderr
, "exim: bad -f address \"%s\": domain literals not "
3883 "allowed\n", sender_address
);
3884 return EXIT_FAILURE
;
3886 if (f_end_dot
&& !strip_trailing_dot
)
3888 fprintf(stderr
, "exim: bad -f address \"%s.\": domain is malformed "
3889 "(trailing dot not allowed)\n", sender_address
);
3890 return EXIT_FAILURE
;
3894 /* See if an admin user overrode our logging. */
3896 if (cmdline_syslog_name
!= NULL
)
3900 syslog_processname
= cmdline_syslog_name
;
3901 log_file_path
= string_copy(CUS
"syslog");
3905 /* not a panic, non-privileged users should not be able to spam paniclog */
3907 "exim: you lack sufficient privilege to specify syslog process name\n");
3908 return EXIT_FAILURE
;
3912 /* Paranoia check of maximum lengths of certain strings. There is a check
3913 on the length of the log file path in log.c, which will come into effect
3914 if there are any calls to write the log earlier than this. However, if we
3915 get this far but the string is very long, it is better to stop now than to
3916 carry on and (e.g.) receive a message and then have to collapse. The call to
3917 log_write() from here will cause the ultimate panic collapse if the complete
3918 file name exceeds the buffer length. */
3920 if (Ustrlen(log_file_path
) > 200)
3921 log_write(0, LOG_MAIN
|LOG_PANIC_DIE
,
3922 "log_file_path is longer than 200 chars: aborting");
3924 if (Ustrlen(pid_file_path
) > 200)
3925 log_write(0, LOG_MAIN
|LOG_PANIC_DIE
,
3926 "pid_file_path is longer than 200 chars: aborting");
3928 if (Ustrlen(spool_directory
) > 200)
3929 log_write(0, LOG_MAIN
|LOG_PANIC_DIE
,
3930 "spool_directory is longer than 200 chars: aborting");
3932 /* Length check on the process name given to syslog for its TAG field,
3933 which is only permitted to be 32 characters or less. See RFC 3164. */
3935 if (Ustrlen(syslog_processname
) > 32)
3936 log_write(0, LOG_MAIN
|LOG_PANIC_DIE
,
3937 "syslog_processname is longer than 32 chars: aborting");
3942 log_write(0, LOG_MAIN
, "%s", log_oneline
);
3943 return EXIT_SUCCESS
;
3946 return EXIT_FAILURE
;
3948 /* In some operating systems, the environment variable TMPDIR controls where
3949 temporary files are created; Exim doesn't use these (apart from when delivering
3950 to MBX mailboxes), but called libraries such as DBM libraries may require them.
3951 If TMPDIR is found in the environment, reset it to the value defined in the
3952 EXIM_TMPDIR macro, if this macro is defined. For backward compatibility this
3953 macro may be called TMPDIR in old "Local/Makefile"s. It's converted to
3954 EXIM_TMPDIR by the build scripts.
3960 if (environ
) for (p
= USS environ
; *p
; p
++)
3961 if (Ustrncmp(*p
, "TMPDIR=", 7) == 0 && Ustrcmp(*p
+7, EXIM_TMPDIR
) != 0)
3963 uschar
* newp
= store_malloc(Ustrlen(EXIM_TMPDIR
) + 8);
3964 sprintf(CS newp
, "TMPDIR=%s", EXIM_TMPDIR
);
3966 DEBUG(D_any
) debug_printf("reset TMPDIR=%s in environment\n", EXIM_TMPDIR
);
3971 /* Timezone handling. If timezone_string is "utc", set a flag to cause all
3972 timestamps to be in UTC (gmtime() is used instead of localtime()). Otherwise,
3973 we may need to get rid of a bogus timezone setting. This can arise when Exim is
3974 called by a user who has set the TZ variable. This then affects the timestamps
3975 in log files and in Received: headers, and any created Date: header lines. The
3976 required timezone is settable in the configuration file, so nothing can be done
3977 about this earlier - but hopefully nothing will normally be logged earlier than
3978 this. We have to make a new environment if TZ is wrong, but don't bother if
3979 timestamps_utc is set, because then all times are in UTC anyway. */
3981 if (timezone_string
&& strcmpic(timezone_string
, US
"UTC") == 0)
3982 timestamps_utc
= TRUE
;
3985 uschar
*envtz
= US
getenv("TZ");
3987 ? !timezone_string
|| Ustrcmp(timezone_string
, envtz
) != 0
3988 : timezone_string
!= NULL
3991 uschar
**p
= USS environ
;
3995 if (environ
) while (*p
++) count
++;
3996 if (!envtz
) count
++;
3997 newp
= new = store_malloc(sizeof(uschar
*) * (count
+ 1));
3998 if (environ
) for (p
= USS environ
; *p
; p
++)
3999 if (Ustrncmp(*p
, "TZ=", 3) != 0) *newp
++ = *p
;
4000 if (timezone_string
)
4002 *newp
= store_malloc(Ustrlen(timezone_string
) + 4);
4003 sprintf(CS
*newp
++, "TZ=%s", timezone_string
);
4008 DEBUG(D_any
) debug_printf("Reset TZ to %s: time is %s\n", timezone_string
,
4009 tod_stamp(tod_log
));
4013 /* Handle the case when we have removed the setuid privilege because of -C or
4014 -D. This means that the caller of Exim was not root.
4016 There is a problem if we were running as the Exim user. The sysadmin may
4017 expect this case to retain privilege because "the binary was called by the
4018 Exim user", but it hasn't, because either the -D option set macros, or the
4019 -C option set a non-trusted configuration file. There are two possibilities:
4021 (1) If deliver_drop_privilege is set, Exim is not going to re-exec in order
4022 to do message deliveries. Thus, the fact that it is running as a
4023 non-privileged user is plausible, and might be wanted in some special
4024 configurations. However, really_exim will have been set false when
4025 privilege was dropped, to stop Exim trying to write to its normal log
4026 files. Therefore, re-enable normal log processing, assuming the sysadmin
4027 has set up the log directory correctly.
4029 (2) If deliver_drop_privilege is not set, the configuration won't work as
4030 apparently intended, and so we log a panic message. In order to retain
4031 root for -C or -D, the caller must either be root or be invoking a
4032 trusted configuration file (when deliver_drop_privilege is false). */
4034 if ( removed_privilege
4035 && (!trusted_config
|| opt_D_used
)
4036 && real_uid
== exim_uid
)
4037 if (deliver_drop_privilege
)
4038 really_exim
= TRUE
; /* let logging work normally */
4040 log_write(0, LOG_MAIN
|LOG_PANIC
,
4041 "exim user lost privilege for using %s option",
4042 trusted_config
? "-D" : "-C");
4044 /* Start up Perl interpreter if Perl support is configured and there is a
4045 perl_startup option, and the configuration or the command line specifies
4046 initializing starting. Note that the global variables are actually called
4047 opt_perl_xxx to avoid clashing with perl's namespace (perl_*). */
4050 if (perl_start_option
!= 0)
4051 opt_perl_at_start
= (perl_start_option
> 0);
4052 if (opt_perl_at_start
&& opt_perl_startup
!= NULL
)
4055 DEBUG(D_any
) debug_printf("Starting Perl interpreter\n");
4056 errstr
= init_perl(opt_perl_startup
);
4059 fprintf(stderr
, "exim: error in perl_startup code: %s\n", errstr
);
4060 return EXIT_FAILURE
;
4062 opt_perl_started
= TRUE
;
4064 #endif /* EXIM_PERL */
4066 /* Log the arguments of the call if the configuration file said so. This is
4067 a debugging feature for finding out what arguments certain MUAs actually use.
4068 Don't attempt it if logging is disabled, or if listing variables or if
4069 verifying/testing addresses or expansions. */
4071 if (((debug_selector
& D_any
) != 0 || LOGGING(arguments
))
4072 && really_exim
&& !list_options
&& !checking
)
4075 uschar
*p
= big_buffer
;
4076 Ustrcpy(p
, "cwd= (failed)");
4078 Ustrncpy(p
+ 4, initial_cwd
, big_buffer_size
-5);
4081 (void)string_format(p
, big_buffer_size
- (p
- big_buffer
), " %d args:", argc
);
4083 for (i
= 0; i
< argc
; i
++)
4085 int len
= Ustrlen(argv
[i
]);
4086 const uschar
*printing
;
4088 if (p
+ len
+ 8 >= big_buffer
+ big_buffer_size
)
4091 log_write(0, LOG_MAIN
, "%s", big_buffer
);
4092 Ustrcpy(big_buffer
, "...");
4095 printing
= string_printing(argv
[i
]);
4096 if (printing
[0] == 0) quote
= US
"\""; else
4098 const uschar
*pp
= printing
;
4100 while (*pp
!= 0) if (isspace(*pp
++)) { quote
= US
"\""; break; }
4102 sprintf(CS p
, " %s%.*s%s", quote
, (int)(big_buffer_size
-
4103 (p
- big_buffer
) - 4), printing
, quote
);
4107 if (LOGGING(arguments
))
4108 log_write(0, LOG_MAIN
, "%s", big_buffer
);
4110 debug_printf("%s\n", big_buffer
);
4113 /* Set the working directory to be the top-level spool directory. We don't rely
4114 on this in the code, which always uses fully qualified names, but it's useful
4115 for core dumps etc. Don't complain if it fails - the spool directory might not
4116 be generally accessible and calls with the -C option (and others) have lost
4117 privilege by now. Before the chdir, we try to ensure that the directory exists.
4120 if (Uchdir(spool_directory
) != 0)
4123 (void)directory_make(spool_directory
, US
"", SPOOL_DIRECTORY_MODE
, FALSE
);
4124 dummy
= /* quieten compiler */ Uchdir(spool_directory
);
4127 /* Handle calls with the -bi option. This is a sendmail option to rebuild *the*
4128 alias file. Exim doesn't have such a concept, but this call is screwed into
4129 Sun's YP makefiles. Handle this by calling a configured script, as the real
4130 user who called Exim. The -oA option can be used to pass an argument to the
4135 (void)fclose(config_file
);
4136 if (bi_command
!= NULL
)
4140 argv
[i
++] = bi_command
;
4141 if (alias_arg
!= NULL
) argv
[i
++] = alias_arg
;
4144 setgroups(group_count
, group_list
);
4145 exim_setugid(real_uid
, real_gid
, FALSE
, US
"running bi_command");
4147 DEBUG(D_exec
) debug_printf("exec %.256s %.256s\n", argv
[0],
4148 (argv
[1] == NULL
)? US
"" : argv
[1]);
4150 execv(CS argv
[0], (char *const *)argv
);
4151 fprintf(stderr
, "exim: exec failed: %s\n", strerror(errno
));
4156 DEBUG(D_any
) debug_printf("-bi used but bi_command not set; exiting\n");
4161 /* We moved the admin/trusted check to be immediately after reading the
4162 configuration file. We leave these prints here to ensure that syslog setup,
4163 logfile setup, and so on has already happened. */
4165 if (trusted_caller
) DEBUG(D_any
) debug_printf("trusted user\n");
4166 if (admin_user
) DEBUG(D_any
) debug_printf("admin user\n");
4168 /* Only an admin user may start the daemon or force a queue run in the default
4169 configuration, but the queue run restriction can be relaxed. Only an admin
4170 user may request that a message be returned to its sender forthwith. Only an
4171 admin user may specify a debug level greater than D_v (because it might show
4172 passwords, etc. in lookup queries). Only an admin user may request a queue
4173 count. Only an admin user can use the test interface to scan for email
4174 (because Exim will be in the spool dir and able to look at mails). */
4178 BOOL debugset
= (debug_selector
& ~D_v
) != 0;
4179 if (deliver_give_up
|| daemon_listen
|| malware_test_file
||
4180 (count_queue
&& queue_list_requires_admin
) ||
4181 (list_queue
&& queue_list_requires_admin
) ||
4182 (queue_interval
>= 0 && prod_requires_admin
) ||
4183 (debugset
&& !running_in_test_harness
))
4185 fprintf(stderr
, "exim:%s permission denied\n", debugset
? " debugging" : "");
4190 /* If the real user is not root or the exim uid, the argument for passing
4191 in an open TCP/IP connection for another message is not permitted, nor is
4192 running with the -N option for any delivery action, unless this call to exim is
4193 one that supplied an input message, or we are using a patched exim for
4194 regression testing. */
4196 if (real_uid
!= root_uid
&& real_uid
!= exim_uid
&&
4197 (continue_hostname
!= NULL
||
4199 (queue_interval
>= 0 || daemon_listen
|| msg_action_arg
> 0)
4200 )) && !running_in_test_harness
)
4202 fprintf(stderr
, "exim: Permission denied\n");
4203 return EXIT_FAILURE
;
4206 /* If the caller is not trusted, certain arguments are ignored when running for
4207 real, but are permitted when checking things (-be, -bv, -bt, -bh, -bf, -bF).
4208 Note that authority for performing certain actions on messages is tested in the
4209 queue_action() function. */
4211 if (!trusted_caller
&& !checking
)
4213 sender_host_name
= sender_host_address
= interface_address
=
4214 sender_ident
= received_protocol
= NULL
;
4215 sender_host_port
= interface_port
= 0;
4216 sender_host_authenticated
= authenticated_sender
= authenticated_id
= NULL
;
4219 /* If a sender host address is set, extract the optional port number off the
4220 end of it and check its syntax. Do the same thing for the interface address.
4221 Exim exits if the syntax is bad. */
4225 if (sender_host_address
!= NULL
)
4226 sender_host_port
= check_port(sender_host_address
);
4227 if (interface_address
!= NULL
)
4228 interface_port
= check_port(interface_address
);
4231 /* If the caller is trusted, then they can use -G to suppress_local_fixups. */
4236 suppress_local_fixups
= suppress_local_fixups_default
= TRUE
;
4237 DEBUG(D_acl
) debug_printf("suppress_local_fixups forced on by -G\n");
4241 fprintf(stderr
, "exim: permission denied (-G requires a trusted user)\n");
4242 return EXIT_FAILURE
;
4246 /* If an SMTP message is being received check to see if the standard input is a
4247 TCP/IP socket. If it is, we assume that Exim was called from inetd if the
4248 caller is root or the Exim user, or if the port is a privileged one. Otherwise,
4253 union sockaddr_46 inetd_sock
;
4254 EXIM_SOCKLEN_T size
= sizeof(inetd_sock
);
4255 if (getpeername(0, (struct sockaddr
*)(&inetd_sock
), &size
) == 0)
4257 int family
= ((struct sockaddr
*)(&inetd_sock
))->sa_family
;
4258 if (family
== AF_INET
|| family
== AF_INET6
)
4260 union sockaddr_46 interface_sock
;
4261 size
= sizeof(interface_sock
);
4263 if (getsockname(0, (struct sockaddr
*)(&interface_sock
), &size
) == 0)
4264 interface_address
= host_ntoa(-1, &interface_sock
, NULL
,
4267 if (host_is_tls_on_connect_port(interface_port
)) tls_in
.on_connect
= TRUE
;
4269 if (real_uid
== root_uid
|| real_uid
== exim_uid
|| interface_port
< 1024)
4272 sender_host_address
= host_ntoa(-1, (struct sockaddr
*)(&inetd_sock
),
4273 NULL
, &sender_host_port
);
4274 if (mua_wrapper
) log_write(0, LOG_MAIN
|LOG_PANIC_DIE
, "Input from "
4275 "inetd is not supported when mua_wrapper is set");
4280 "exim: Permission denied (unprivileged user, unprivileged port)\n");
4281 return EXIT_FAILURE
;
4287 /* If the load average is going to be needed while receiving a message, get it
4288 now for those OS that require the first call to os_getloadavg() to be done as
4289 root. There will be further calls later for each message received. */
4291 #ifdef LOAD_AVG_NEEDS_ROOT
4292 if (receiving_message
&&
4293 (queue_only_load
>= 0 ||
4294 (is_inetd
&& smtp_load_reserve
>= 0)
4297 load_average
= OS_GETLOADAVG();
4301 /* The queue_only configuration option can be overridden by -odx on the command
4302 line, except that if queue_only_override is false, queue_only cannot be unset
4303 from the command line. */
4305 if (queue_only_set
&& (queue_only_override
|| arg_queue_only
))
4306 queue_only
= arg_queue_only
;
4308 /* The receive_timeout and smtp_receive_timeout options can be overridden by
4311 if (arg_receive_timeout
>= 0) receive_timeout
= arg_receive_timeout
;
4312 if (arg_smtp_receive_timeout
>= 0)
4313 smtp_receive_timeout
= arg_smtp_receive_timeout
;
4315 /* If Exim was started with root privilege, unless we have already removed the
4316 root privilege above as a result of -C, -D, -be, -bf or -bF, remove it now
4317 except when starting the daemon or doing some kind of delivery or address
4318 testing (-bt). These are the only cases when root need to be retained. We run
4319 as exim for -bv and -bh. However, if deliver_drop_privilege is set, root is
4320 retained only for starting the daemon. We always do the initgroups() in this
4321 situation (controlled by the TRUE below), in order to be as close as possible
4322 to the state Exim usually runs in. */
4324 if (!unprivileged
&& /* originally had root AND */
4325 !removed_privilege
&& /* still got root AND */
4326 !daemon_listen
&& /* not starting the daemon */
4327 queue_interval
<= 0 && /* (either kind of daemon) */
4329 deliver_drop_privilege
|| /* requested unprivileged */
4331 queue_interval
< 0 && /* not running the queue */
4332 (msg_action_arg
< 0 || /* and */
4333 msg_action
!= MSG_DELIVER
) && /* not delivering and */
4334 (!checking
|| !address_test_mode
) /* not address checking */
4338 exim_setugid(exim_uid
, exim_gid
, TRUE
, US
"privilege not needed");
4341 /* When we are retaining a privileged uid, we still change to the exim gid. */
4346 rv
= setgid(exim_gid
);
4347 /* Impact of failure is that some stuff might end up with an incorrect group.
4348 We track this for failures from root, since any attempt to change privilege
4349 by root should succeed and failures should be examined. For non-root,
4350 there's no security risk. For me, it's { exim -bV } on a just-built binary,
4351 no need to complain then. */
4354 if (!(unprivileged
|| removed_privilege
))
4357 "exim: changing group failed: %s\n", strerror(errno
));
4361 DEBUG(D_any
) debug_printf("changing group to %ld failed: %s\n",
4362 (long int)exim_gid
, strerror(errno
));
4366 /* Handle a request to scan a file for malware */
4367 if (malware_test_file
)
4369 #ifdef WITH_CONTENT_SCAN
4371 set_process_info("scanning file for malware");
4372 result
= malware_in_file(malware_test_file
);
4375 printf("No malware found.\n");
4380 printf("Malware lookup returned non-okay/fail: %d\n", result
);
4384 printf("Malware found: %s\n", malware_name
);
4386 printf("Malware scan detected malware of unknown name.\n");
4388 printf("Malware scanning not enabled at compile time.\n");
4393 /* Handle a request to list the delivery queue */
4397 set_process_info("listing the queue");
4398 queue_list(list_queue_option
, argv
+ recipients_arg
, argc
- recipients_arg
);
4402 /* Handle a request to count the delivery queue */
4406 set_process_info("counting the queue");
4411 /* Handle actions on specific messages, except for the force delivery and
4412 message load actions, which are done below. Some actions take a whole list of
4413 message ids, which are known to continue up to the end of the arguments. Others
4414 take a single message id and then operate on the recipients list. */
4416 if (msg_action_arg
> 0 && msg_action
!= MSG_DELIVER
&& msg_action
!= MSG_LOAD
)
4418 int yield
= EXIT_SUCCESS
;
4419 set_process_info("acting on specified messages");
4421 if (!one_msg_action
)
4423 for (i
= msg_action_arg
; i
< argc
; i
++)
4424 if (!queue_action(argv
[i
], msg_action
, NULL
, 0, 0))
4425 yield
= EXIT_FAILURE
;
4428 else if (!queue_action(argv
[msg_action_arg
], msg_action
, argv
, argc
,
4429 recipients_arg
)) yield
= EXIT_FAILURE
;
4433 /* We used to set up here to skip reading the ACL section, on
4434 (msg_action_arg > 0 || (queue_interval == 0 && !daemon_listen)
4435 Now, since the intro of the ${acl } expansion, ACL definitions may be
4436 needed in transports so we lost the optimisation. */
4440 /* The configuration data will have been read into POOL_PERM because we won't
4441 ever want to reset back past it. Change the current pool to POOL_MAIN. In fact,
4442 this is just a bit of pedantic tidiness. It wouldn't really matter if the
4443 configuration were read into POOL_MAIN, because we don't do any resets till
4444 later on. However, it seems right, and it does ensure that both pools get used.
4447 store_pool
= POOL_MAIN
;
4449 /* Handle the -brt option. This is for checking out retry configurations.
4450 The next three arguments are a domain name or a complete address, and
4451 optionally two error numbers. All it does is to call the function that
4452 scans the retry configuration data. */
4454 if (test_retry_arg
>= 0)
4456 retry_config
*yield
;
4457 int basic_errno
= 0;
4461 if (test_retry_arg
>= argc
)
4463 printf("-brt needs a domain or address argument\n");
4464 exim_exit(EXIT_FAILURE
);
4466 s1
= argv
[test_retry_arg
++];
4469 /* If the first argument contains no @ and no . it might be a local user
4470 or it might be a single-component name. Treat as a domain. */
4472 if (Ustrchr(s1
, '@') == NULL
&& Ustrchr(s1
, '.') == NULL
)
4474 printf("Warning: \"%s\" contains no '@' and no '.' characters. It is "
4475 "being \ntreated as a one-component domain, not as a local part.\n\n",
4479 /* There may be an optional second domain arg. */
4481 if (test_retry_arg
< argc
&& Ustrchr(argv
[test_retry_arg
], '.') != NULL
)
4482 s2
= argv
[test_retry_arg
++];
4484 /* The final arg is an error name */
4486 if (test_retry_arg
< argc
)
4488 uschar
*ss
= argv
[test_retry_arg
];
4490 readconf_retry_error(ss
, ss
+ Ustrlen(ss
), &basic_errno
, &more_errno
);
4493 printf("%s\n", CS error
);
4494 return EXIT_FAILURE
;
4497 /* For the {MAIL,RCPT,DATA}_4xx errors, a value of 255 means "any", and a
4498 code > 100 as an error is for matching codes to the decade. Turn them into
4499 a real error code, off the decade. */
4501 if (basic_errno
== ERRNO_MAIL4XX
||
4502 basic_errno
== ERRNO_RCPT4XX
||
4503 basic_errno
== ERRNO_DATA4XX
)
4505 int code
= (more_errno
>> 8) & 255;
4507 more_errno
= (more_errno
& 0xffff00ff) | (21 << 8);
4508 else if (code
> 100)
4509 more_errno
= (more_errno
& 0xffff00ff) | ((code
- 96) << 8);
4513 yield
= retry_find_config(s1
, s2
, basic_errno
, more_errno
);
4514 if (yield
== NULL
) printf("No retry information found\n"); else
4517 more_errno
= yield
->more_errno
;
4518 printf("Retry rule: %s ", yield
->pattern
);
4520 if (yield
->basic_errno
== ERRNO_EXIMQUOTA
)
4522 printf("quota%s%s ",
4523 (more_errno
> 0)? "_" : "",
4524 (more_errno
> 0)? readconf_printtime(more_errno
) : US
"");
4526 else if (yield
->basic_errno
== ECONNREFUSED
)
4528 printf("refused%s%s ",
4529 (more_errno
> 0)? "_" : "",
4530 (more_errno
== 'M')? "MX" :
4531 (more_errno
== 'A')? "A" : "");
4533 else if (yield
->basic_errno
== ETIMEDOUT
)
4536 if ((more_errno
& RTEF_CTOUT
) != 0) printf("_connect");
4538 if (more_errno
!= 0) printf("_%s",
4539 (more_errno
== 'M')? "MX" : "A");
4542 else if (yield
->basic_errno
== ERRNO_AUTHFAIL
)
4543 printf("auth_failed ");
4546 for (r
= yield
->rules
; r
!= NULL
; r
= r
->next
)
4548 printf("%c,%s", r
->rule
, readconf_printtime(r
->timeout
)); /* Do not */
4549 printf(",%s", readconf_printtime(r
->p1
)); /* amalgamate */
4555 printf(",%d.", x
/1000);
4569 exim_exit(EXIT_SUCCESS
);
4572 /* Handle a request to list one or more configuration options */
4573 /* If -n was set, we suppress some information */
4577 set_process_info("listing variables");
4578 if (recipients_arg
>= argc
) readconf_print(US
"all", NULL
, flag_n
);
4579 else for (i
= recipients_arg
; i
< argc
; i
++)
4582 (Ustrcmp(argv
[i
], "router") == 0 ||
4583 Ustrcmp(argv
[i
], "transport") == 0 ||
4584 Ustrcmp(argv
[i
], "authenticator") == 0 ||
4585 Ustrcmp(argv
[i
], "macro") == 0 ||
4586 Ustrcmp(argv
[i
], "environment") == 0))
4588 readconf_print(argv
[i
+1], argv
[i
], flag_n
);
4591 else readconf_print(argv
[i
], NULL
, flag_n
);
4593 exim_exit(EXIT_SUCCESS
);
4598 set_process_info("listing config");
4599 readconf_print(US
"config", NULL
, flag_n
);
4600 exim_exit(EXIT_SUCCESS
);
4604 /* Initialise subsystems as required */
4605 #ifndef DISABLE_DKIM
4611 /* Handle a request to deliver one or more messages that are already on the
4612 queue. Values of msg_action other than MSG_DELIVER and MSG_LOAD are dealt with
4613 above. MSG_LOAD is handled with -be (which is the only time it applies) below.
4615 Delivery of specific messages is typically used for a small number when
4616 prodding by hand (when the option forced_delivery will be set) or when
4617 re-execing to regain root privilege. Each message delivery must happen in a
4618 separate process, so we fork a process for each one, and run them sequentially
4619 so that debugging output doesn't get intertwined, and to avoid spawning too
4620 many processes if a long list is given. However, don't fork for the last one;
4621 this saves a process in the common case when Exim is called to deliver just one
4624 if (msg_action_arg
> 0 && msg_action
!= MSG_LOAD
)
4626 if (prod_requires_admin
&& !admin_user
)
4628 fprintf(stderr
, "exim: Permission denied\n");
4629 exim_exit(EXIT_FAILURE
);
4631 set_process_info("delivering specified messages");
4632 if (deliver_give_up
) forced_delivery
= deliver_force_thaw
= TRUE
;
4633 for (i
= msg_action_arg
; i
< argc
; i
++)
4638 (void)deliver_message(argv
[i
], forced_delivery
, deliver_give_up
);
4639 else if ((pid
= fork()) == 0)
4641 (void)deliver_message(argv
[i
], forced_delivery
, deliver_give_up
);
4642 _exit(EXIT_SUCCESS
);
4646 fprintf(stderr
, "failed to fork delivery process for %s: %s\n", argv
[i
],
4648 exim_exit(EXIT_FAILURE
);
4652 exim_exit(EXIT_SUCCESS
);
4656 /* If only a single queue run is requested, without SMTP listening, we can just
4657 turn into a queue runner, with an optional starting message id. */
4659 if (queue_interval
== 0 && !daemon_listen
)
4661 DEBUG(D_queue_run
) debug_printf("Single queue run%s%s%s%s\n",
4662 (start_queue_run_id
== NULL
)? US
"" : US
" starting at ",
4663 (start_queue_run_id
== NULL
)? US
"" : start_queue_run_id
,
4664 (stop_queue_run_id
== NULL
)? US
"" : US
" stopping at ",
4665 (stop_queue_run_id
== NULL
)? US
"" : stop_queue_run_id
);
4667 set_process_info("running the '%s' queue (single queue run)", queue_name
);
4669 set_process_info("running the queue (single queue run)");
4670 queue_run(start_queue_run_id
, stop_queue_run_id
, FALSE
);
4671 exim_exit(EXIT_SUCCESS
);
4675 /* Find the login name of the real user running this process. This is always
4676 needed when receiving a message, because it is written into the spool file. It
4677 may also be used to construct a from: or a sender: header, and in this case we
4678 need the user's full name as well, so save a copy of it, checked for RFC822
4679 syntax and munged if necessary, if it hasn't previously been set by the -F
4680 argument. We may try to get the passwd entry more than once, in case NIS or
4681 other delays are in evidence. Save the home directory for use in filter testing
4686 if ((pw
= getpwuid(real_uid
)) != NULL
)
4688 originator_login
= string_copy(US pw
->pw_name
);
4689 originator_home
= string_copy(US pw
->pw_dir
);
4691 /* If user name has not been set by -F, set it from the passwd entry
4692 unless -f has been used to set the sender address by a trusted user. */
4694 if (originator_name
== NULL
)
4696 if (sender_address
== NULL
||
4697 (!trusted_caller
&& filter_test
== FTEST_NONE
))
4699 uschar
*name
= US pw
->pw_gecos
;
4700 uschar
*amp
= Ustrchr(name
, '&');
4703 /* Most Unix specify that a '&' character in the gecos field is
4704 replaced by a copy of the login name, and some even specify that
4705 the first character should be upper cased, so that's what we do. */
4710 string_format(buffer
, sizeof(buffer
), "%.*s%n%s%s",
4711 amp
- name
, name
, &loffset
, originator_login
, amp
+ 1);
4712 buffer
[loffset
] = toupper(buffer
[loffset
]);
4716 /* If a pattern for matching the gecos field was supplied, apply
4717 it and then expand the name string. */
4719 if (gecos_pattern
!= NULL
&& gecos_name
!= NULL
)
4722 re
= regex_must_compile(gecos_pattern
, FALSE
, TRUE
); /* Use malloc */
4724 if (regex_match_and_setup(re
, name
, 0, -1))
4726 uschar
*new_name
= expand_string(gecos_name
);
4728 if (new_name
!= NULL
)
4730 DEBUG(D_receive
) debug_printf("user name \"%s\" extracted from "
4731 "gecos field \"%s\"\n", new_name
, name
);
4734 else DEBUG(D_receive
) debug_printf("failed to expand gecos_name string "
4735 "\"%s\": %s\n", gecos_name
, expand_string_message
);
4737 else DEBUG(D_receive
) debug_printf("gecos_pattern \"%s\" did not match "
4738 "gecos field \"%s\"\n", gecos_pattern
, name
);
4739 store_free((void *)re
);
4741 originator_name
= string_copy(name
);
4744 /* A trusted caller has used -f but not -F */
4746 else originator_name
= US
"";
4749 /* Break the retry loop */
4754 if (++i
> finduser_retries
) break;
4758 /* If we cannot get a user login, log the incident and give up, unless the
4759 configuration specifies something to use. When running in the test harness,
4760 any setting of unknown_login overrides the actual name. */
4762 if (originator_login
== NULL
|| running_in_test_harness
)
4764 if (unknown_login
!= NULL
)
4766 originator_login
= expand_string(unknown_login
);
4767 if (originator_name
== NULL
&& unknown_username
!= NULL
)
4768 originator_name
= expand_string(unknown_username
);
4769 if (originator_name
== NULL
) originator_name
= US
"";
4771 if (originator_login
== NULL
)
4772 log_write(0, LOG_MAIN
|LOG_PANIC_DIE
, "Failed to get user name for uid %d",
4776 /* Ensure that the user name is in a suitable form for use as a "phrase" in an
4779 originator_name
= string_copy(parse_fix_phrase(originator_name
,
4780 Ustrlen(originator_name
), big_buffer
, big_buffer_size
));
4782 /* If a message is created by this call of Exim, the uid/gid of its originator
4783 are those of the caller. These values are overridden if an existing message is
4784 read in from the spool. */
4786 originator_uid
= real_uid
;
4787 originator_gid
= real_gid
;
4789 DEBUG(D_receive
) debug_printf("originator: uid=%d gid=%d login=%s name=%s\n",
4790 (int)originator_uid
, (int)originator_gid
, originator_login
, originator_name
);
4792 /* Run in daemon and/or queue-running mode. The function daemon_go() never
4793 returns. We leave this till here so that the originator_ fields are available
4794 for incoming messages via the daemon. The daemon cannot be run in mua_wrapper
4797 if (daemon_listen
|| inetd_wait_mode
|| queue_interval
> 0)
4801 fprintf(stderr
, "Daemon cannot be run when mua_wrapper is set\n");
4802 log_write(0, LOG_MAIN
|LOG_PANIC_DIE
, "Daemon cannot be run when "
4803 "mua_wrapper is set");
4808 /* If the sender ident has not been set (by a trusted caller) set it to
4809 the caller. This will get overwritten below for an inetd call. If a trusted
4810 caller has set it empty, unset it. */
4812 if (sender_ident
== NULL
) sender_ident
= originator_login
;
4813 else if (sender_ident
[0] == 0) sender_ident
= NULL
;
4815 /* Handle the -brw option, which is for checking out rewriting rules. Cause log
4816 writes (on errors) to go to stderr instead. Can't do this earlier, as want the
4817 originator_* variables set. */
4819 if (test_rewrite_arg
>= 0)
4821 really_exim
= FALSE
;
4822 if (test_rewrite_arg
>= argc
)
4824 printf("-brw needs an address argument\n");
4825 exim_exit(EXIT_FAILURE
);
4827 rewrite_test(argv
[test_rewrite_arg
]);
4828 exim_exit(EXIT_SUCCESS
);
4831 /* A locally-supplied message is considered to be coming from a local user
4832 unless a trusted caller supplies a sender address with -f, or is passing in the
4833 message via SMTP (inetd invocation or otherwise). */
4835 if ((sender_address
== NULL
&& !smtp_input
) ||
4836 (!trusted_caller
&& filter_test
== FTEST_NONE
))
4838 sender_local
= TRUE
;
4840 /* A trusted caller can supply authenticated_sender and authenticated_id
4841 via -oMas and -oMai and if so, they will already be set. Otherwise, force
4842 defaults except when host checking. */
4844 if (authenticated_sender
== NULL
&& !host_checking
)
4845 authenticated_sender
= string_sprintf("%s@%s", originator_login
,
4846 qualify_domain_sender
);
4847 if (authenticated_id
== NULL
&& !host_checking
)
4848 authenticated_id
= originator_login
;
4851 /* Trusted callers are always permitted to specify the sender address.
4852 Untrusted callers may specify it if it matches untrusted_set_sender, or if what
4853 is specified is the empty address. However, if a trusted caller does not
4854 specify a sender address for SMTP input, we leave sender_address unset. This
4855 causes the MAIL commands to be honoured. */
4857 if ((!smtp_input
&& sender_address
== NULL
) ||
4858 !receive_check_set_sender(sender_address
))
4860 /* Either the caller is not permitted to set a general sender, or this is
4861 non-SMTP input and the trusted caller has not set a sender. If there is no
4862 sender, or if a sender other than <> is set, override with the originator's
4863 login (which will get qualified below), except when checking things. */
4865 if (sender_address
== NULL
/* No sender_address set */
4867 (sender_address
[0] != 0 && /* Non-empty sender address, AND */
4868 !checking
)) /* Not running tests, including filter tests */
4870 sender_address
= originator_login
;
4871 sender_address_forced
= FALSE
;
4872 sender_address_domain
= 0;
4876 /* Remember whether an untrusted caller set the sender address */
4878 sender_set_untrusted
= sender_address
!= originator_login
&& !trusted_caller
;
4880 /* Ensure that the sender address is fully qualified unless it is the empty
4881 address, which indicates an error message, or doesn't exist (root caller, smtp
4882 interface, no -f argument). */
4884 if (sender_address
!= NULL
&& sender_address
[0] != 0 &&
4885 sender_address_domain
== 0)
4886 sender_address
= string_sprintf("%s@%s", local_part_quote(sender_address
),
4887 qualify_domain_sender
);
4889 DEBUG(D_receive
) debug_printf("sender address = %s\n", sender_address
);
4891 /* Handle a request to verify a list of addresses, or test them for delivery.
4892 This must follow the setting of the sender address, since routers can be
4893 predicated upon the sender. If no arguments are given, read addresses from
4894 stdin. Set debug_level to at least D_v to get full output for address testing.
4897 if (verify_address_mode
|| address_test_mode
)
4900 int flags
= vopt_qualify
;
4902 if (verify_address_mode
)
4904 if (!verify_as_sender
) flags
|= vopt_is_recipient
;
4905 DEBUG(D_verify
) debug_print_ids(US
"Verifying:");
4910 flags
|= vopt_is_recipient
;
4911 debug_selector
|= D_v
;
4912 debug_file
= stderr
;
4913 debug_fd
= fileno(debug_file
);
4914 DEBUG(D_verify
) debug_print_ids(US
"Address testing:");
4917 if (recipients_arg
< argc
)
4919 while (recipients_arg
< argc
)
4921 uschar
*s
= argv
[recipients_arg
++];
4924 BOOL finished
= FALSE
;
4925 uschar
*ss
= parse_find_address_end(s
, FALSE
);
4926 if (*ss
== ',') *ss
= 0; else finished
= TRUE
;
4927 test_address(s
, flags
, &exit_value
);
4930 while (*(++s
) != 0 && (*s
== ',' || isspace(*s
)));
4937 uschar
*s
= get_stdinput(NULL
, NULL
);
4938 if (s
== NULL
) break;
4939 test_address(s
, flags
, &exit_value
);
4943 exim_exit(exit_value
);
4946 /* Handle expansion checking. Either expand items on the command line, or read
4947 from stdin if there aren't any. If -Mset was specified, load the message so
4948 that its variables can be used, but restrict this facility to admin users.
4949 Otherwise, if -bem was used, read a message from stdin. */
4953 dns_init(FALSE
, FALSE
, FALSE
);
4954 if (msg_action_arg
> 0 && msg_action
== MSG_LOAD
)
4956 uschar spoolname
[256]; /* Not big_buffer; used in spool_read_header() */
4959 fprintf(stderr
, "exim: permission denied\n");
4962 message_id
= argv
[msg_action_arg
];
4963 (void)string_format(spoolname
, sizeof(spoolname
), "%s-H", message_id
);
4964 if ((deliver_datafile
= spool_open_datafile(message_id
)) < 0)
4965 printf ("Failed to load message datafile %s\n", message_id
);
4966 if (spool_read_header(spoolname
, TRUE
, FALSE
) != spool_read_OK
)
4967 printf ("Failed to load message %s\n", message_id
);
4970 /* Read a test message from a file. We fudge it up to be on stdin, saving
4971 stdin itself for later reading of expansion strings. */
4973 else if (expansion_test_message
!= NULL
)
4975 int save_stdin
= dup(0);
4976 int fd
= Uopen(expansion_test_message
, O_RDONLY
, 0);
4979 fprintf(stderr
, "exim: failed to open %s: %s\n", expansion_test_message
,
4981 return EXIT_FAILURE
;
4984 filter_test
= FTEST_USER
; /* Fudge to make it look like filter test */
4985 message_ended
= END_NOTENDED
;
4986 read_message_body(receive_msg(extract_recipients
));
4987 message_linecount
+= body_linecount
;
4988 (void)dup2(save_stdin
, 0);
4989 (void)close(save_stdin
);
4990 clearerr(stdin
); /* Required by Darwin */
4993 /* Allow $recipients for this testing */
4995 enable_dollar_recipients
= TRUE
;
4997 /* Expand command line items */
4999 if (recipients_arg
< argc
)
5001 while (recipients_arg
< argc
)
5003 uschar
*s
= argv
[recipients_arg
++];
5004 uschar
*ss
= expand_string(s
);
5005 if (ss
== NULL
) printf ("Failed: %s\n", expand_string_message
);
5006 else printf("%s\n", CS ss
);
5014 char *(*fn_readline
)(const char *) = NULL
;
5015 void (*fn_addhist
)(const char *) = NULL
;
5018 void *dlhandle
= set_readline(&fn_readline
, &fn_addhist
);
5024 uschar
*source
= get_stdinput(fn_readline
, fn_addhist
);
5025 if (source
== NULL
) break;
5026 ss
= expand_string(source
);
5028 printf ("Failed: %s\n", expand_string_message
);
5029 else printf("%s\n", CS ss
);
5033 if (dlhandle
!= NULL
) dlclose(dlhandle
);
5037 /* The data file will be open after -Mset */
5039 if (deliver_datafile
>= 0)
5041 (void)close(deliver_datafile
);
5042 deliver_datafile
= -1;
5045 exim_exit(EXIT_SUCCESS
);
5049 /* The active host name is normally the primary host name, but it can be varied
5050 for hosts that want to play several parts at once. We need to ensure that it is
5051 set for host checking, and for receiving messages. */
5053 smtp_active_hostname
= primary_hostname
;
5054 if (raw_active_hostname
!= NULL
)
5056 uschar
*nah
= expand_string(raw_active_hostname
);
5059 if (!expand_string_forcedfail
)
5060 log_write(0, LOG_MAIN
|LOG_PANIC_DIE
, "failed to expand \"%s\" "
5061 "(smtp_active_hostname): %s", raw_active_hostname
,
5062 expand_string_message
);
5064 else if (nah
[0] != 0) smtp_active_hostname
= nah
;
5067 /* Handle host checking: this facility mocks up an incoming SMTP call from a
5068 given IP address so that the blocking and relay configuration can be tested.
5069 Unless a sender_ident was set by -oMt, we discard it (the default is the
5070 caller's login name). An RFC 1413 call is made only if we are running in the
5071 test harness and an incoming interface and both ports are specified, because
5072 there is no TCP/IP call to find the ident for. */
5079 if (!sender_ident_set
)
5081 sender_ident
= NULL
;
5082 if (running_in_test_harness
&& sender_host_port
!= 0 &&
5083 interface_address
!= NULL
&& interface_port
!= 0)
5084 verify_get_ident(1413);
5087 /* In case the given address is a non-canonical IPv6 address, canonicize
5088 it. The code works for both IPv4 and IPv6, as it happens. */
5090 size
= host_aton(sender_host_address
, x
);
5091 sender_host_address
= store_get(48); /* large enough for full IPv6 */
5092 (void)host_nmtoa(size
, x
, -1, sender_host_address
, ':');
5094 /* Now set up for testing */
5096 host_build_sender_fullhost();
5100 sender_local
= FALSE
;
5101 sender_host_notsocket
= TRUE
;
5102 debug_file
= stderr
;
5103 debug_fd
= fileno(debug_file
);
5104 fprintf(stdout
, "\n**** SMTP testing session as if from host %s\n"
5105 "**** but without any ident (RFC 1413) callback.\n"
5106 "**** This is not for real!\n\n",
5107 sender_host_address
);
5109 memset(sender_host_cache
, 0, sizeof(sender_host_cache
));
5110 if (verify_check_host(&hosts_connection_nolog
) == OK
)
5111 BIT_CLEAR(log_selector
, log_selector_size
, Li_smtp_connection
);
5112 log_write(L_smtp_connection
, LOG_MAIN
, "%s", smtp_get_connection_info());
5114 /* NOTE: We do *not* call smtp_log_no_mail() if smtp_start_session() fails,
5115 because a log line has already been written for all its failure exists
5116 (usually "connection refused: <reason>") and writing another one is
5117 unnecessary clutter. */
5119 if (smtp_start_session())
5121 reset_point
= store_get(0);
5124 store_reset(reset_point
);
5125 if (smtp_setup_msg() <= 0) break;
5126 if (!receive_msg(FALSE
)) break;
5130 exim_exit(EXIT_SUCCESS
);
5134 /* Arrange for message reception if recipients or SMTP were specified;
5135 otherwise complain unless a version print (-bV) happened or this is a filter
5136 verification test or info dump.
5137 In the former case, show the configuration file name. */
5139 if (recipients_arg
>= argc
&& !extract_recipients
&& !smtp_input
)
5141 if (version_printed
)
5143 printf("Configuration file is %s\n", config_main_filename
);
5144 return EXIT_SUCCESS
;
5147 if (info_flag
!= CMDINFO_NONE
)
5149 show_exim_information(info_flag
, info_stdout
? stdout
: stderr
);
5150 return info_stdout
? EXIT_SUCCESS
: EXIT_FAILURE
;
5153 if (filter_test
== FTEST_NONE
)
5154 exim_usage(called_as
);
5158 /* If mua_wrapper is set, Exim is being used to turn an MUA that submits on the
5159 standard input into an MUA that submits to a smarthost over TCP/IP. We know
5160 that we are not called from inetd, because that is rejected above. The
5161 following configuration settings are forced here:
5163 (1) Synchronous delivery (-odi)
5164 (2) Errors to stderr (-oep == -oeq)
5165 (3) No parallel remote delivery
5166 (4) Unprivileged delivery
5168 We don't force overall queueing options because there are several of them;
5169 instead, queueing is avoided below when mua_wrapper is set. However, we do need
5170 to override any SMTP queueing. */
5174 synchronous_delivery
= TRUE
;
5175 arg_error_handling
= ERRORS_STDERR
;
5176 remote_max_parallel
= 1;
5177 deliver_drop_privilege
= TRUE
;
5179 queue_smtp_domains
= NULL
;
5181 message_utf8_downconvert
= -1; /* convert-if-needed */
5186 /* Prepare to accept one or more new messages on the standard input. When a
5187 message has been read, its id is returned in message_id[]. If doing immediate
5188 delivery, we fork a delivery process for each received message, except for the
5189 last one, where we can save a process switch.
5191 It is only in non-smtp mode that error_handling is allowed to be changed from
5192 its default of ERRORS_SENDER by argument. (Idle thought: are any of the
5193 sendmail error modes other than -oem ever actually used? Later: yes.) */
5195 if (!smtp_input
) error_handling
= arg_error_handling
;
5197 /* If this is an inetd call, ensure that stderr is closed to prevent panic
5198 logging being sent down the socket and make an identd call to get the
5203 (void)fclose(stderr
);
5204 exim_nullstd(); /* Re-open to /dev/null */
5205 verify_get_ident(IDENT_PORT
);
5206 host_build_sender_fullhost();
5207 set_process_info("handling incoming connection from %s via inetd",
5211 /* If the sender host address has been set, build sender_fullhost if it hasn't
5212 already been done (which it will have been for inetd). This caters for the
5213 case when it is forced by -oMa. However, we must flag that it isn't a socket,
5214 so that the test for IP options is skipped for -bs input. */
5216 if (sender_host_address
!= NULL
&& sender_fullhost
== NULL
)
5218 host_build_sender_fullhost();
5219 set_process_info("handling incoming connection from %s via -oMa",
5221 sender_host_notsocket
= TRUE
;
5224 /* Otherwise, set the sender host as unknown except for inetd calls. This
5225 prevents host checking in the case of -bs not from inetd and also for -bS. */
5227 else if (!is_inetd
) sender_host_unknown
= TRUE
;
5229 /* If stdout does not exist, then dup stdin to stdout. This can happen
5230 if exim is started from inetd. In this case fd 0 will be set to the socket,
5231 but fd 1 will not be set. This also happens for passed SMTP channels. */
5233 if (fstat(1, &statbuf
) < 0) (void)dup2(0, 1);
5235 /* Set up the incoming protocol name and the state of the program. Root is
5236 allowed to force received protocol via the -oMr option above. If we have come
5237 via inetd, the process info has already been set up. We don't set
5238 received_protocol here for smtp input, as it varies according to
5239 batch/HELO/EHLO/AUTH/TLS. */
5243 if (!is_inetd
) set_process_info("accepting a local %sSMTP message from <%s>",
5244 smtp_batched_input
? "batched " : "",
5245 (sender_address
!= NULL
)? sender_address
: originator_login
);
5249 if (received_protocol
== NULL
)
5250 received_protocol
= string_sprintf("local%s", called_as
);
5251 set_process_info("accepting a local non-SMTP message from <%s>",
5255 /* Initialize the session_local_queue-only flag (this will be ignored if
5256 mua_wrapper is set) */
5259 session_local_queue_only
= queue_only
;
5261 /* For non-SMTP and for batched SMTP input, check that there is enough space on
5262 the spool if so configured. On failure, we must not attempt to send an error
5263 message! (For interactive SMTP, the check happens at MAIL FROM and an SMTP
5264 error code is given.) */
5266 if ((!smtp_input
|| smtp_batched_input
) && !receive_check_fs(0))
5268 fprintf(stderr
, "exim: insufficient disk space\n");
5269 return EXIT_FAILURE
;
5272 /* If this is smtp input of any kind, real or batched, handle the start of the
5275 NOTE: We do *not* call smtp_log_no_mail() if smtp_start_session() fails,
5276 because a log line has already been written for all its failure exists
5277 (usually "connection refused: <reason>") and writing another one is
5278 unnecessary clutter. */
5284 memset(sender_host_cache
, 0, sizeof(sender_host_cache
));
5285 if (verify_check_host(&hosts_connection_nolog
) == OK
)
5286 BIT_CLEAR(log_selector
, log_selector_size
, Li_smtp_connection
);
5287 log_write(L_smtp_connection
, LOG_MAIN
, "%s", smtp_get_connection_info());
5288 if (!smtp_start_session())
5291 exim_exit(EXIT_SUCCESS
);
5295 /* Otherwise, set up the input size limit here. */
5299 thismessage_size_limit
= expand_string_integer(message_size_limit
, TRUE
);
5300 if (expand_string_message
!= NULL
)
5302 if (thismessage_size_limit
== -1)
5303 log_write(0, LOG_MAIN
|LOG_PANIC_DIE
, "failed to expand "
5304 "message_size_limit: %s", expand_string_message
);
5306 log_write(0, LOG_MAIN
|LOG_PANIC_DIE
, "invalid value for "
5307 "message_size_limit: %s", expand_string_message
);
5311 /* Loop for several messages when reading SMTP input. If we fork any child
5312 processes, we don't want to wait for them unless synchronous delivery is
5313 requested, so set SIGCHLD to SIG_IGN in that case. This is not necessarily the
5314 same as SIG_DFL, despite the fact that documentation often lists the default as
5315 "ignore". This is a confusing area. This is what I know:
5317 At least on some systems (e.g. Solaris), just setting SIG_IGN causes child
5318 processes that complete simply to go away without ever becoming defunct. You
5319 can't then wait for them - but we don't want to wait for them in the
5320 non-synchronous delivery case. However, this behaviour of SIG_IGN doesn't
5321 happen for all OS (e.g. *BSD is different).
5323 But that's not the end of the story. Some (many? all?) systems have the
5324 SA_NOCLDWAIT option for sigaction(). This requests the behaviour that Solaris
5325 has by default, so it seems that the difference is merely one of default
5326 (compare restarting vs non-restarting signals).
5328 To cover all cases, Exim sets SIG_IGN with SA_NOCLDWAIT here if it can. If not,
5329 it just sets SIG_IGN. To be on the safe side it also calls waitpid() at the end
5330 of the loop below. Paranoia rules.
5332 February 2003: That's *still* not the end of the story. There are now versions
5333 of Linux (where SIG_IGN does work) that are picky. If, having set SIG_IGN, a
5334 process then calls waitpid(), a grumble is written to the system log, because
5335 this is logically inconsistent. In other words, it doesn't like the paranoia.
5336 As a consequenc of this, the waitpid() below is now excluded if we are sure
5337 that SIG_IGN works. */
5339 if (!synchronous_delivery
)
5342 struct sigaction act
;
5343 act
.sa_handler
= SIG_IGN
;
5344 sigemptyset(&(act
.sa_mask
));
5345 act
.sa_flags
= SA_NOCLDWAIT
;
5346 sigaction(SIGCHLD
, &act
, NULL
);
5348 signal(SIGCHLD
, SIG_IGN
);
5352 /* Save the current store pool point, for resetting at the start of
5353 each message, and save the real sender address, if any. */
5355 reset_point
= store_get(0);
5356 real_sender_address
= sender_address
;
5358 /* Loop to receive messages; receive_msg() returns TRUE if there are more
5359 messages to be read (SMTP input), or FALSE otherwise (not SMTP, or SMTP channel
5364 store_reset(reset_point
);
5367 /* Handle the SMTP case; call smtp_setup_mst() to deal with the initial SMTP
5368 input and build the recipients list, before calling receive_msg() to read the
5369 message proper. Whatever sender address is given in the SMTP transaction is
5370 often ignored for local senders - we use the actual sender, which is normally
5371 either the underlying user running this process or a -f argument provided by
5372 a trusted caller. It is saved in real_sender_address. The test for whether to
5373 accept the SMTP sender is encapsulated in receive_check_set_sender(). */
5378 if ((rc
= smtp_setup_msg()) > 0)
5380 if (real_sender_address
!= NULL
&&
5381 !receive_check_set_sender(sender_address
))
5383 sender_address
= raw_sender
= real_sender_address
;
5384 sender_address_unrewritten
= NULL
;
5387 /* For batched SMTP, we have to run the acl_not_smtp_start ACL, since it
5388 isn't really SMTP, so no other ACL will run until the acl_not_smtp one at
5389 the very end. The result of the ACL is ignored (as for other non-SMTP
5390 messages). It is run for its potential side effects. */
5392 if (smtp_batched_input
&& acl_not_smtp_start
!= NULL
)
5394 uschar
*user_msg
, *log_msg
;
5395 enable_dollar_recipients
= TRUE
;
5396 (void)acl_check(ACL_WHERE_NOTSMTP_START
, NULL
, acl_not_smtp_start
,
5397 &user_msg
, &log_msg
);
5398 enable_dollar_recipients
= FALSE
;
5401 /* Now get the data for the message */
5403 more
= receive_msg(extract_recipients
);
5404 if (message_id
[0] == 0)
5407 smtp_log_no_mail(); /* Log no mail if configured */
5408 exim_exit(EXIT_FAILURE
);
5413 smtp_log_no_mail(); /* Log no mail if configured */
5414 exim_exit((rc
== 0)? EXIT_SUCCESS
: EXIT_FAILURE
);
5418 /* In the non-SMTP case, we have all the information from the command
5419 line, but must process it in case it is in the more general RFC822
5420 format, and in any case, to detect syntax errors. Also, it appears that
5421 the use of comma-separated lists as single arguments is common, so we
5422 had better support them. */
5428 int count
= argc
- recipients_arg
;
5429 uschar
**list
= argv
+ recipients_arg
;
5431 /* These options cannot be changed dynamically for non-SMTP messages */
5433 active_local_sender_retain
= local_sender_retain
;
5434 active_local_from_check
= local_from_check
;
5436 /* Save before any rewriting */
5438 raw_sender
= string_copy(sender_address
);
5440 /* Loop for each argument */
5442 for (i
= 0; i
< count
; i
++)
5444 int start
, end
, domain
;
5446 uschar
*s
= list
[i
];
5448 /* Loop for each comma-separated address */
5452 BOOL finished
= FALSE
;
5454 uschar
*ss
= parse_find_address_end(s
, FALSE
);
5456 if (*ss
== ',') *ss
= 0; else finished
= TRUE
;
5458 /* Check max recipients - if -t was used, these aren't recipients */
5460 if (recipients_max
> 0 && ++rcount
> recipients_max
&&
5461 !extract_recipients
)
5462 if (error_handling
== ERRORS_STDERR
)
5464 fprintf(stderr
, "exim: too many recipients\n");
5465 exim_exit(EXIT_FAILURE
);
5470 moan_to_sender(ERRMESS_TOOMANYRECIP
, NULL
, NULL
, stdin
, TRUE
)?
5471 errors_sender_rc
: EXIT_FAILURE
;
5476 BOOL b
= allow_utf8_domains
;
5477 allow_utf8_domains
= TRUE
;
5480 parse_extract_address(s
, &errmess
, &start
, &end
, &domain
, FALSE
);
5483 if (string_is_utf8(recipient
))
5484 message_smtputf8
= TRUE
;
5486 allow_utf8_domains
= b
;
5489 if (domain
== 0 && !allow_unqualified_recipient
)
5492 errmess
= US
"unqualified recipient address not allowed";
5495 if (recipient
== NULL
)
5497 if (error_handling
== ERRORS_STDERR
)
5499 fprintf(stderr
, "exim: bad recipient address \"%s\": %s\n",
5500 string_printing(list
[i
]), errmess
);
5501 exim_exit(EXIT_FAILURE
);
5507 eblock
.text1
= string_printing(list
[i
]);
5508 eblock
.text2
= errmess
;
5510 moan_to_sender(ERRMESS_BADARGADDRESS
, &eblock
, NULL
, stdin
, TRUE
)?
5511 errors_sender_rc
: EXIT_FAILURE
;
5515 receive_add_recipient(recipient
, -1);
5518 while (*(++s
) != 0 && (*s
== ',' || isspace(*s
)));
5522 /* Show the recipients when debugging */
5527 if (sender_address
!= NULL
) debug_printf("Sender: %s\n", sender_address
);
5528 if (recipients_list
!= NULL
)
5530 debug_printf("Recipients:\n");
5531 for (i
= 0; i
< recipients_count
; i
++)
5532 debug_printf(" %s\n", recipients_list
[i
].address
);
5536 /* Run the acl_not_smtp_start ACL if required. The result of the ACL is
5537 ignored; rejecting here would just add complication, and it can just as
5538 well be done later. Allow $recipients to be visible in the ACL. */
5540 if (acl_not_smtp_start
)
5542 uschar
*user_msg
, *log_msg
;
5543 enable_dollar_recipients
= TRUE
;
5544 (void)acl_check(ACL_WHERE_NOTSMTP_START
, NULL
, acl_not_smtp_start
,
5545 &user_msg
, &log_msg
);
5546 enable_dollar_recipients
= FALSE
;
5549 /* Pause for a while waiting for input. If none received in that time,
5550 close the logfile, if we had one open; then if we wait for a long-running
5551 datasource (months, in one use-case) log rotation will not leave us holding
5554 if (!receive_timeout
)
5556 struct timeval t
= { 30*60, 0 }; /* 30 minutess */
5559 FD_ZERO(&r
); FD_SET(0, &r
);
5560 if (select(1, &r
, NULL
, NULL
, &t
) == 0) mainlog_close();
5563 /* Read the data for the message. If filter_test is not FTEST_NONE, this
5564 will just read the headers for the message, and not write anything onto the
5567 message_ended
= END_NOTENDED
;
5568 more
= receive_msg(extract_recipients
);
5570 /* more is always FALSE here (not SMTP message) when reading a message
5571 for real; when reading the headers of a message for filter testing,
5572 it is TRUE if the headers were terminated by '.' and FALSE otherwise. */
5574 if (message_id
[0] == 0) exim_exit(EXIT_FAILURE
);
5575 } /* Non-SMTP message reception */
5577 /* If this is a filter testing run, there are headers in store, but
5578 no message on the spool. Run the filtering code in testing mode, setting
5579 the domain to the qualify domain and the local part to the current user,
5580 unless they have been set by options. The prefix and suffix are left unset
5581 unless specified. The the return path is set to to the sender unless it has
5582 already been set from a return-path header in the message. */
5584 if (filter_test
!= FTEST_NONE
)
5586 deliver_domain
= (ftest_domain
!= NULL
)?
5587 ftest_domain
: qualify_domain_recipient
;
5588 deliver_domain_orig
= deliver_domain
;
5589 deliver_localpart
= (ftest_localpart
!= NULL
)?
5590 ftest_localpart
: originator_login
;
5591 deliver_localpart_orig
= deliver_localpart
;
5592 deliver_localpart_prefix
= ftest_prefix
;
5593 deliver_localpart_suffix
= ftest_suffix
;
5594 deliver_home
= originator_home
;
5596 if (return_path
== NULL
)
5598 printf("Return-path copied from sender\n");
5599 return_path
= string_copy(sender_address
);
5602 printf("Return-path = %s\n", (return_path
[0] == 0)? US
"<>" : return_path
);
5603 printf("Sender = %s\n", (sender_address
[0] == 0)? US
"<>" : sender_address
);
5605 receive_add_recipient(
5606 string_sprintf("%s%s%s@%s",
5607 (ftest_prefix
== NULL
)? US
"" : ftest_prefix
,
5609 (ftest_suffix
== NULL
)? US
"" : ftest_suffix
,
5610 deliver_domain
), -1);
5612 printf("Recipient = %s\n", recipients_list
[0].address
);
5613 if (ftest_prefix
!= NULL
) printf("Prefix = %s\n", ftest_prefix
);
5614 if (ftest_suffix
!= NULL
) printf("Suffix = %s\n", ftest_suffix
);
5616 if (chdir("/")) /* Get away from wherever the user is running this from */
5618 DEBUG(D_receive
) debug_printf("chdir(\"/\") failed\n");
5619 exim_exit(EXIT_FAILURE
);
5622 /* Now we run either a system filter test, or a user filter test, or both.
5623 In the latter case, headers added by the system filter will persist and be
5624 available to the user filter. We need to copy the filter variables
5627 if ((filter_test
& FTEST_SYSTEM
) != 0)
5629 if (!filter_runtest(filter_sfd
, filter_test_sfile
, TRUE
, more
))
5630 exim_exit(EXIT_FAILURE
);
5633 memcpy(filter_sn
, filter_n
, sizeof(filter_sn
));
5635 if ((filter_test
& FTEST_USER
) != 0)
5637 if (!filter_runtest(filter_ufd
, filter_test_ufile
, FALSE
, more
))
5638 exim_exit(EXIT_FAILURE
);
5641 exim_exit(EXIT_SUCCESS
);
5644 /* Else act on the result of message reception. We should not get here unless
5645 message_id[0] is non-zero. If queue_only is set, session_local_queue_only
5646 will be TRUE. If it is not, check on the number of messages received in this
5649 if (!session_local_queue_only
&&
5650 smtp_accept_queue_per_connection
> 0 &&
5651 receive_messagecount
> smtp_accept_queue_per_connection
)
5653 session_local_queue_only
= TRUE
;
5654 queue_only_reason
= 2;
5657 /* Initialize local_queue_only from session_local_queue_only. If it is false,
5658 and queue_only_load is set, check that the load average is below it. If it is
5659 not, set local_queue_only TRUE. If queue_only_load_latch is true (the
5660 default), we put the whole session into queue_only mode. It then remains this
5661 way for any subsequent messages on the same SMTP connection. This is a
5662 deliberate choice; even though the load average may fall, it doesn't seem
5663 right to deliver later messages on the same call when not delivering earlier
5664 ones. However, there are odd cases where this is not wanted, so this can be
5665 changed by setting queue_only_load_latch false. */
5667 local_queue_only
= session_local_queue_only
;
5668 if (!local_queue_only
&& queue_only_load
>= 0)
5670 local_queue_only
= (load_average
= OS_GETLOADAVG()) > queue_only_load
;
5671 if (local_queue_only
)
5673 queue_only_reason
= 3;
5674 if (queue_only_load_latch
) session_local_queue_only
= TRUE
;
5678 /* If running as an MUA wrapper, all queueing options and freezing options
5682 local_queue_only
= queue_only_policy
= deliver_freeze
= FALSE
;
5684 /* Log the queueing here, when it will get a message id attached, but
5685 not if queue_only is set (case 0). Case 1 doesn't happen here (too many
5688 if (local_queue_only
) switch(queue_only_reason
)
5691 log_write(L_delay_delivery
,
5692 LOG_MAIN
, "no immediate delivery: more than %d messages "
5693 "received in one connection", smtp_accept_queue_per_connection
);
5697 log_write(L_delay_delivery
,
5698 LOG_MAIN
, "no immediate delivery: load average %.2f",
5699 (double)load_average
/1000.0);
5703 /* Else do the delivery unless the ACL or local_scan() called for queue only
5704 or froze the message. Always deliver in a separate process. A fork failure is
5705 not a disaster, as the delivery will eventually happen on a subsequent queue
5706 run. The search cache must be tidied before the fork, as the parent will
5707 do it before exiting. The child will trigger a lookup failure and
5708 thereby defer the delivery if it tries to use (for example) a cached ldap
5709 connection that the parent has called unbind on. */
5711 else if (!queue_only_policy
&& !deliver_freeze
)
5716 if ((pid
= fork()) == 0)
5719 close_unwanted(); /* Close unwanted file descriptors and TLS */
5720 exim_nullstd(); /* Ensure std{in,out,err} exist */
5722 /* Re-exec Exim if we need to regain privilege (note: in mua_wrapper
5723 mode, deliver_drop_privilege is forced TRUE). */
5725 if (geteuid() != root_uid
&& !deliver_drop_privilege
&& !unprivileged
)
5727 (void)child_exec_exim(CEE_EXEC_EXIT
, FALSE
, NULL
, FALSE
,
5728 2, US
"-Mc", message_id
);
5729 /* Control does not return here. */
5732 /* No need to re-exec */
5734 rc
= deliver_message(message_id
, FALSE
, FALSE
);
5736 _exit((!mua_wrapper
|| rc
== DELIVER_MUA_SUCCEEDED
)?
5737 EXIT_SUCCESS
: EXIT_FAILURE
);
5742 log_write(0, LOG_MAIN
|LOG_PANIC
, "failed to fork automatic delivery "
5743 "process: %s", strerror(errno
));
5746 /* In the parent, wait if synchronous delivery is required. This will
5747 always be the case in MUA wrapper mode. */
5749 else if (synchronous_delivery
)
5752 while (wait(&status
) != pid
);
5753 if ((status
& 0x00ff) != 0)
5754 log_write(0, LOG_MAIN
|LOG_PANIC
,
5755 "process %d crashed with signal %d while delivering %s",
5756 (int)pid
, status
& 0x00ff, message_id
);
5757 if (mua_wrapper
&& (status
& 0xffff) != 0) exim_exit(EXIT_FAILURE
);
5761 /* The loop will repeat if more is TRUE. If we do not know know that the OS
5762 automatically reaps children (see comments above the loop), clear away any
5763 finished subprocesses here, in case there are lots of messages coming in
5764 from the same source. */
5766 #ifndef SIG_IGN_WORKS
5767 while (waitpid(-1, NULL
, WNOHANG
) > 0);
5771 exim_exit(EXIT_SUCCESS
); /* Never returns */
5772 return 0; /* To stop compiler warning */