1 /* $Cambridge: exim/src/src/exim.c,v 1.45 2006/10/23 13:24:21 ph10 Exp $ */
3 /*************************************************
4 * Exim - an Internet mail transport agent *
5 *************************************************/
7 /* Copyright (c) University of Cambridge 1995 - 2006 */
8 /* See the file NOTICE for conditions of use and distribution. */
11 /* The main function: entry point, initialization, and high-level control.
12 Also a few functions that don't naturally fit elsewhere. */
19 /*************************************************
20 * Function interface to store functions *
21 *************************************************/
23 /* We need some real functions to pass to the PCRE regular expression library
24 for store allocation via Exim's store manager. The normal calls are actually
25 macros that pass over location information to make tracing easier. These
26 functions just interface to the standard macro calls. A good compiler will
27 optimize out the tail recursion and so not make them too expensive. There
28 are two sets of functions; one for use when we want to retain the compiled
29 regular expression for a long time; the other for short-term use. */
32 function_store_get(size_t size
)
34 return store_get((int)size
);
38 function_dummy_free(void *block
) { block
= block
; }
41 function_store_malloc(size_t size
)
43 return store_malloc((int)size
);
47 function_store_free(void *block
)
55 /*************************************************
56 * Compile regular expression and panic on fail *
57 *************************************************/
59 /* This function is called when failure to compile a regular expression leads
60 to a panic exit. In other cases, pcre_compile() is called directly. In many
61 cases where this function is used, the results of the compilation are to be
62 placed in long-lived store, so we temporarily reset the store management
63 functions that PCRE uses if the use_malloc flag is set.
66 pattern the pattern to compile
67 caseless TRUE if caseless matching is required
68 use_malloc TRUE if compile into malloc store
70 Returns: pointer to the compiled pattern
74 regex_must_compile(uschar
*pattern
, BOOL caseless
, BOOL use_malloc
)
77 int options
= PCRE_COPT
;
82 pcre_malloc
= function_store_malloc
;
83 pcre_free
= function_store_free
;
85 if (caseless
) options
|= PCRE_CASELESS
;
86 yield
= pcre_compile(CS pattern
, options
, (const char **)&error
, &offset
, NULL
);
87 pcre_malloc
= function_store_get
;
88 pcre_free
= function_dummy_free
;
90 log_write(0, LOG_MAIN
|LOG_PANIC_DIE
, "regular expression error: "
91 "%s at offset %d while compiling %s", error
, offset
, pattern
);
98 /*************************************************
99 * Execute regular expression and set strings *
100 *************************************************/
102 /* This function runs a regular expression match, and sets up the pointers to
103 the matched substrings.
106 re the compiled expression
107 subject the subject string
108 options additional PCRE options
109 setup if < 0 do full setup
110 if >= 0 setup from setup+1 onwards,
111 excluding the full matched string
113 Returns: TRUE or FALSE
117 regex_match_and_setup(const pcre
*re
, uschar
*subject
, int options
, int setup
)
119 int ovector
[3*(EXPAND_MAXN
+1)];
120 int n
= pcre_exec(re
, NULL
, CS subject
, Ustrlen(subject
), 0,
121 PCRE_EOPT
| options
, ovector
, sizeof(ovector
)/sizeof(int));
123 if (n
== 0) n
= EXPAND_MAXN
+ 1;
127 expand_nmax
= (setup
< 0)? 0 : setup
+ 1;
128 for (nn
= (setup
< 0)? 0 : 2; nn
< n
*2; nn
+= 2)
130 expand_nstring
[expand_nmax
] = subject
+ ovector
[nn
];
131 expand_nlength
[expand_nmax
++] = ovector
[nn
+1] - ovector
[nn
];
141 /*************************************************
142 * Handler for SIGUSR1 *
143 *************************************************/
145 /* SIGUSR1 causes any exim process to write to the process log details of
146 what it is currently doing. It will only be used if the OS is capable of
147 setting up a handler that causes automatic restarting of any system call
148 that is in progress at the time.
150 Argument: the signal number (SIGUSR1)
155 usr1_handler(int sig
)
157 sig
= sig
; /* Keep picky compilers happy */
158 log_write(0, LOG_PROCESS
, "%s", process_info
);
160 os_restarting_signal(SIGUSR1
, usr1_handler
);
165 /*************************************************
167 *************************************************/
169 /* This handler is enabled most of the time that Exim is running. The handler
170 doesn't actually get used unless alarm() has been called to set a timer, to
171 place a time limit on a system call of some kind. When the handler is run, it
174 There are some other SIGALRM handlers that are used in special cases when more
175 than just a flag setting is required; for example, when reading a message's
176 input. These are normally set up in the code module that uses them, and the
177 SIGALRM handler is reset to this one afterwards.
179 Argument: the signal value (SIGALRM)
184 sigalrm_handler(int sig
)
186 sig
= sig
; /* Keep picky compilers happy */
188 os_non_restarting_signal(SIGALRM
, sigalrm_handler
);
193 /*************************************************
194 * Sleep for a fractional time interval *
195 *************************************************/
197 /* This function is called by millisleep() and exim_wait_tick() to wait for a
198 period of time that may include a fraction of a second. The coding is somewhat
199 tedious. We do not expect setitimer() ever to fail, but if it does, the process
200 will wait for ever, so we panic in this instance. (There was a case of this
201 when a bug in a function that calls milliwait() caused it to pass invalid data.
202 That's when I added the check. :-)
204 Argument: an itimerval structure containing the interval
209 milliwait(struct itimerval
*itval
)
212 sigset_t old_sigmask
;
213 (void)sigemptyset(&sigmask
); /* Empty mask */
214 (void)sigaddset(&sigmask
, SIGALRM
); /* Add SIGALRM */
215 (void)sigprocmask(SIG_BLOCK
, &sigmask
, &old_sigmask
); /* Block SIGALRM */
216 if (setitimer(ITIMER_REAL
, itval
, NULL
) < 0) /* Start timer */
217 log_write(0, LOG_MAIN
|LOG_PANIC_DIE
,
218 "setitimer() failed: %s", strerror(errno
));
219 (void)sigfillset(&sigmask
); /* All signals */
220 (void)sigdelset(&sigmask
, SIGALRM
); /* Remove SIGALRM */
221 (void)sigsuspend(&sigmask
); /* Until SIGALRM */
222 (void)sigprocmask(SIG_SETMASK
, &old_sigmask
, NULL
); /* Restore mask */
228 /*************************************************
229 * Millisecond sleep function *
230 *************************************************/
232 /* The basic sleep() function has a granularity of 1 second, which is too rough
233 in some cases - for example, when using an increasing delay to slow down
236 Argument: number of millseconds
243 struct itimerval itval
;
244 itval
.it_interval
.tv_sec
= 0;
245 itval
.it_interval
.tv_usec
= 0;
246 itval
.it_value
.tv_sec
= msec
/1000;
247 itval
.it_value
.tv_usec
= (msec
% 1000) * 1000;
253 /*************************************************
254 * Compare microsecond times *
255 *************************************************/
262 Returns: -1, 0, or +1
266 exim_tvcmp(struct timeval
*t1
, struct timeval
*t2
)
268 if (t1
->tv_sec
> t2
->tv_sec
) return +1;
269 if (t1
->tv_sec
< t2
->tv_sec
) return -1;
270 if (t1
->tv_usec
> t2
->tv_usec
) return +1;
271 if (t1
->tv_usec
< t2
->tv_usec
) return -1;
278 /*************************************************
279 * Clock tick wait function *
280 *************************************************/
282 /* Exim uses a time + a pid to generate a unique identifier in two places: its
283 message IDs, and in file names for maildir deliveries. Because some OS now
284 re-use pids within the same second, sub-second times are now being used.
285 However, for absolute certaintly, we must ensure the clock has ticked before
286 allowing the relevant process to complete. At the time of implementation of
287 this code (February 2003), the speed of processors is such that the clock will
288 invariably have ticked already by the time a process has done its job. This
289 function prepares for the time when things are faster - and it also copes with
290 clocks that go backwards.
293 then_tv A timeval which was used to create uniqueness; its usec field
294 has been rounded down to the value of the resolution.
295 We want to be sure the current time is greater than this.
296 resolution The resolution that was used to divide the microseconds
297 (1 for maildir, larger for message ids)
303 exim_wait_tick(struct timeval
*then_tv
, int resolution
)
305 struct timeval now_tv
;
306 long int now_true_usec
;
308 (void)gettimeofday(&now_tv
, NULL
);
309 now_true_usec
= now_tv
.tv_usec
;
310 now_tv
.tv_usec
= (now_true_usec
/resolution
) * resolution
;
312 if (exim_tvcmp(&now_tv
, then_tv
) <= 0)
314 struct itimerval itval
;
315 itval
.it_interval
.tv_sec
= 0;
316 itval
.it_interval
.tv_usec
= 0;
317 itval
.it_value
.tv_sec
= then_tv
->tv_sec
- now_tv
.tv_sec
;
318 itval
.it_value
.tv_usec
= then_tv
->tv_usec
+ resolution
- now_true_usec
;
320 /* We know that, overall, "now" is less than or equal to "then". Therefore, a
321 negative value for the microseconds is possible only in the case when "now"
322 is more than a second less than "then". That means that itval.it_value.tv_sec
323 is greater than zero. The following correction is therefore safe. */
325 if (itval
.it_value
.tv_usec
< 0)
327 itval
.it_value
.tv_usec
+= 1000000;
328 itval
.it_value
.tv_sec
-= 1;
331 DEBUG(D_transport
|D_receive
)
333 if (!running_in_test_harness
)
335 debug_printf("tick check: %lu.%06lu %lu.%06lu\n",
336 then_tv
->tv_sec
, then_tv
->tv_usec
, now_tv
.tv_sec
, now_tv
.tv_usec
);
337 debug_printf("waiting %lu.%06lu\n", itval
.it_value
.tv_sec
,
338 itval
.it_value
.tv_usec
);
349 /*************************************************
350 * Set up processing details *
351 *************************************************/
353 /* Save a text string for dumping when SIGUSR1 is received.
354 Do checks for overruns.
356 Arguments: format and arguments, as for printf()
361 set_process_info(char *format
, ...)
365 sprintf(CS process_info
, "%5d ", (int)getpid());
366 len
= Ustrlen(process_info
);
367 va_start(ap
, format
);
368 if (!string_vformat(process_info
+ len
, PROCESS_INFO_SIZE
- len
, format
, ap
))
369 Ustrcpy(process_info
+ len
, "**** string overflowed buffer ****");
370 DEBUG(D_process_info
) debug_printf("set_process_info: %s\n", process_info
);
378 /*************************************************
379 * Call fopen() with umask 777 and adjust mode *
380 *************************************************/
382 /* Exim runs with umask(0) so that files created with open() have the mode that
383 is specified in the open() call. However, there are some files, typically in
384 the spool directory, that are created with fopen(). They end up world-writeable
385 if no precautions are taken. Although the spool directory is not accessible to
386 the world, this is an untidiness. So this is a wrapper function for fopen()
387 that sorts out the mode of the created file.
390 filename the file name
391 options the fopen() options
392 mode the required mode
394 Returns: the fopened FILE or NULL
398 modefopen(uschar
*filename
, char *options
, mode_t mode
)
400 mode_t saved_umask
= umask(0777);
401 FILE *f
= Ufopen(filename
, options
);
402 (void)umask(saved_umask
);
403 if (f
!= NULL
) (void)fchmod(fileno(f
), mode
);
410 /*************************************************
411 * Ensure stdin, stdout, and stderr exist *
412 *************************************************/
414 /* Some operating systems grumble if an exec() happens without a standard
415 input, output, and error (fds 0, 1, 2) being defined. The worry is that some
416 file will be opened and will use these fd values, and then some other bit of
417 code will assume, for example, that it can write error messages to stderr.
418 This function ensures that fds 0, 1, and 2 are open if they do not already
419 exist, by connecting them to /dev/null.
421 This function is also used to ensure that std{in,out,err} exist at all times,
422 so that if any library that Exim calls tries to use them, it doesn't crash.
434 for (i
= 0; i
<= 2; i
++)
436 if (fstat(i
, &statbuf
) < 0 && errno
== EBADF
)
438 if (devnull
< 0) devnull
= open("/dev/null", O_RDWR
);
439 if (devnull
< 0) log_write(0, LOG_MAIN
|LOG_PANIC_DIE
, "%s",
440 string_open_failed(errno
, "/dev/null"));
441 if (devnull
!= i
) (void)dup2(devnull
, i
);
444 if (devnull
> 2) (void)close(devnull
);
450 /*************************************************
451 * Close unwanted file descriptors for delivery *
452 *************************************************/
454 /* This function is called from a new process that has been forked to deliver
455 an incoming message, either directly, or using exec.
457 We want any smtp input streams to be closed in this new process. However, it
458 has been observed that using fclose() here causes trouble. When reading in -bS
459 input, duplicate copies of messages have been seen. The files will be sharing a
460 file pointer with the parent process, and it seems that fclose() (at least on
461 some systems - I saw this on Solaris 2.5.1) messes with that file pointer, at
462 least sometimes. Hence we go for closing the underlying file descriptors.
464 If TLS is active, we want to shut down the TLS library, but without molesting
465 the parent's SSL connection.
467 For delivery of a non-SMTP message, we want to close stdin and stdout (and
468 stderr unless debugging) because the calling process might have set them up as
469 pipes and be waiting for them to close before it waits for the submission
470 process to terminate. If they aren't closed, they hold up the calling process
471 until the initial delivery process finishes, which is not what we want.
473 Exception: We do want it for synchronous delivery!
475 And notwithstanding all the above, if D_resolver is set, implying resolver
476 debugging, leave stdout open, because that's where the resolver writes its
479 When we close stderr (which implies we've also closed stdout), we also get rid
480 of any controlling terminal.
492 tls_close(FALSE
); /* Shut down the TLS library */
494 (void)close(fileno(smtp_in
));
495 (void)close(fileno(smtp_out
));
500 (void)close(0); /* stdin */
501 if ((debug_selector
& D_resolver
) == 0) (void)close(1); /* stdout */
502 if (debug_selector
== 0) /* stderr */
504 if (!synchronous_delivery
)
517 /*************************************************
519 *************************************************/
521 /* This function sets a new uid and gid permanently, optionally calling
522 initgroups() to set auxiliary groups. There are some special cases when running
523 Exim in unprivileged modes. In these situations the effective uid will not be
524 root; if we already have the right effective uid/gid, and don't need to
525 initialize any groups, leave things as they are.
530 igflag TRUE if initgroups() wanted
531 msg text to use in debugging output and failure log
533 Returns: nothing; bombs out on failure
537 exim_setugid(uid_t uid
, gid_t gid
, BOOL igflag
, uschar
*msg
)
539 uid_t euid
= geteuid();
540 gid_t egid
= getegid();
542 if (euid
== root_uid
|| euid
!= uid
|| egid
!= gid
|| igflag
)
544 /* At least one OS returns +1 for initgroups failure, so just check for
549 struct passwd
*pw
= getpwuid(uid
);
552 if (initgroups(pw
->pw_name
, gid
) != 0)
553 log_write(0,LOG_MAIN
|LOG_PANIC_DIE
,"initgroups failed for uid=%ld: %s",
554 (long int)uid
, strerror(errno
));
556 else log_write(0, LOG_MAIN
|LOG_PANIC_DIE
, "cannot run initgroups(): "
557 "no passwd entry for uid=%ld", (long int)uid
);
560 if (setgid(gid
) < 0 || setuid(uid
) < 0)
562 log_write(0, LOG_MAIN
|LOG_PANIC_DIE
, "unable to set gid=%ld or uid=%ld "
563 "(euid=%ld): %s", (long int)gid
, (long int)uid
, (long int)euid
, msg
);
567 /* Debugging output included uid/gid and all groups */
572 gid_t group_list
[NGROUPS_MAX
];
573 debug_printf("changed uid/gid: %s\n uid=%ld gid=%ld pid=%ld\n", msg
,
574 (long int)geteuid(), (long int)getegid(), (long int)getpid());
575 group_count
= getgroups(NGROUPS_MAX
, group_list
);
576 debug_printf(" auxiliary group list:");
580 for (i
= 0; i
< group_count
; i
++) debug_printf(" %d", (int)group_list
[i
]);
582 else debug_printf(" <none>");
590 /*************************************************
592 *************************************************/
594 /* Exim exits via this function so that it always clears up any open
600 Returns: does not return
608 debug_printf(">>>>>>>>>>>>>>>> Exim pid=%d terminating with rc=%d "
609 ">>>>>>>>>>>>>>>>\n", (int)getpid(), rc
);
616 /*************************************************
617 * Extract port from host address *
618 *************************************************/
620 /* Called to extract the port from the values given to -oMa and -oMi.
621 It also checks the syntax of the address, and terminates it before the
622 port data when a port is extracted.
625 address the address, with possible port on the end
627 Returns: the port, or zero if there isn't one
628 bombs out on a syntax error
632 check_port(uschar
*address
)
634 int port
= host_address_extract_port(address
);
635 if (string_is_ip_address(address
, NULL
) == 0)
637 fprintf(stderr
, "exim abandoned: \"%s\" is not an IP address\n", address
);
645 /*************************************************
646 * Test/verify an address *
647 *************************************************/
649 /* This function is called by the -bv and -bt code. It extracts a working
650 address from a full RFC 822 address. This isn't really necessary per se, but it
651 has the effect of collapsing source routes.
655 flags flag bits for verify_address()
656 exit_value to be set for failures
662 test_address(uschar
*s
, int flags
, int *exit_value
)
664 int start
, end
, domain
;
665 uschar
*parse_error
= NULL
;
666 uschar
*address
= parse_extract_address(s
, &parse_error
, &start
, &end
, &domain
,
670 fprintf(stdout
, "syntax error: %s\n", parse_error
);
675 int rc
= verify_address(deliver_make_addr(address
,TRUE
), stdout
, flags
, -1,
676 -1, -1, NULL
, NULL
, NULL
);
677 if (rc
== FAIL
) *exit_value
= 2;
678 else if (rc
== DEFER
&& *exit_value
== 0) *exit_value
= 1;
684 /*************************************************
685 * Decode bit settings for log/debug *
686 *************************************************/
688 /* This function decodes a string containing bit settings in the form of +name
689 and/or -name sequences, and sets/unsets bits in a bit string accordingly. It
690 also recognizes a numeric setting of the form =<number>, but this is not
691 intended for user use. It's an easy way for Exim to pass the debug settings
692 when it is re-exec'ed.
694 The log options are held in two unsigned ints (because there became too many
695 for one). The top bit in the table means "put in 2nd selector". This does not
696 yet apply to debug options, so the "=" facility sets only the first selector.
698 The "all" selector, which must be equal to 0xffffffff, is recognized specially.
699 It sets all the bits in both selectors. However, there is a facility for then
700 unsetting certain bits, because we want to turn off "memory" in the debug case.
702 A bad value for a debug setting is treated as an unknown option - error message
703 to stderr and die. For log settings, which come from the configuration file,
704 we write to the log on the way out...
707 selector1 address of the first bit string
708 selector2 address of the second bit string, or NULL
709 notall1 bits to exclude from "all" for selector1
710 notall2 bits to exclude from "all" for selector2
711 string the configured string
712 options the table of option names
714 which "log" or "debug"
716 Returns: nothing on success - bomb out on failure
720 decode_bits(unsigned int *selector1
, unsigned int *selector2
, int notall1
,
721 int notall2
, uschar
*string
, bit_table
*options
, int count
, uschar
*which
)
724 if (string
== NULL
) return;
728 char *end
; /* Not uschar */
729 *selector1
= strtoul(CS string
+1, &end
, 0);
730 if (*end
== 0) return;
731 errmsg
= string_sprintf("malformed numeric %s_selector setting: %s", which
,
736 /* Handle symbolic setting */
743 bit_table
*start
, *end
;
745 while (isspace(*string
)) string
++;
746 if (*string
== 0) return;
748 if (*string
!= '+' && *string
!= '-')
750 errmsg
= string_sprintf("malformed %s_selector setting: "
751 "+ or - expected but found \"%s\"", which
, string
);
755 adding
= *string
++ == '+';
757 while (isalnum(*string
) || *string
== '_') string
++;
761 end
= options
+ count
;
765 bit_table
*middle
= start
+ (end
- start
)/2;
766 int c
= Ustrncmp(s
, middle
->name
, len
);
769 if (middle
->name
[len
] != 0) c
= -1; else
771 unsigned int bit
= middle
->bit
;
772 unsigned int *selector
;
774 /* The value with all bits set means "force all bits in both selectors"
775 in the case where two are being handled. However, the top bit in the
776 second selector is never set. When setting, some bits can be excluded.
779 if (bit
== 0xffffffff)
783 *selector1
= 0xffffffff ^ notall1
;
784 if (selector2
!= NULL
) *selector2
= 0x7fffffff ^ notall2
;
789 if (selector2
!= NULL
) *selector2
= 0;
793 /* Otherwise, the 0x80000000 bit means "this value, without the top
794 bit, belongs in the second selector". */
798 if ((bit
& 0x80000000) != 0)
800 selector
= selector2
;
803 else selector
= selector1
;
804 if (adding
) *selector
|= bit
; else *selector
&= ~bit
;
806 break; /* Out of loop to match selector name */
809 if (c
< 0) end
= middle
; else start
= middle
+ 1;
810 } /* Loop to match selector name */
814 errmsg
= string_sprintf("unknown %s_selector setting: %c%.*s", which
,
815 adding
? '+' : '-', len
, s
);
818 } /* Loop for selector names */
820 /* Handle disasters */
823 if (Ustrcmp(which
, "debug") == 0)
825 fprintf(stderr
, "exim: %s\n", errmsg
);
828 else log_write(0, LOG_CONFIG
|LOG_PANIC_DIE
, "%s", errmsg
);
833 /*************************************************
834 * Show supported features *
835 *************************************************/
837 /* This function is called for -bV and for -d to output the optional features
838 of the current Exim binary.
840 Arguments: a FILE for printing
845 show_whats_supported(FILE *f
)
847 #ifdef DB_VERSION_STRING
848 fprintf(f
, "Berkeley DB: %s\n", DB_VERSION_STRING
);
849 #elif defined(BTREEVERSION) && defined(HASHVERSION)
851 fprintf(f
, "Probably Berkeley DB version 1.8x (native mode)\n");
853 fprintf(f
, "Probably Berkeley DB version 1.8x (compatibility mode)\n");
855 #elif defined(_DBM_RDONLY) || defined(dbm_dirfno)
856 fprintf(f
, "Probably ndbm\n");
857 #elif defined(USE_TDB)
858 fprintf(f
, "Using tdb\n");
861 fprintf(f
, "Probably GDBM (native mode)\n");
863 fprintf(f
, "Probably GDBM (compatibility mode)\n");
867 fprintf(f
, "Support for:");
868 #ifdef SUPPORT_CRYPTEQ
869 fprintf(f
, " crypteq");
872 fprintf(f
, " iconv()");
877 #ifdef HAVE_SETCLASSRESOURCES
878 fprintf(f
, " use_setclassresources");
887 fprintf(f
, " Expand_dlfunc");
889 #ifdef USE_TCP_WRAPPERS
890 fprintf(f
, " TCPwrappers");
894 fprintf(f
, " GnuTLS");
896 fprintf(f
, " OpenSSL");
899 #ifdef SUPPORT_TRANSLATE_IP_ADDRESS
900 fprintf(f
, " translate_ip_address");
902 #ifdef SUPPORT_MOVE_FROZEN_MESSAGES
903 fprintf(f
, " move_frozen_messages");
905 #ifdef WITH_CONTENT_SCAN
906 fprintf(f
, " Content_Scanning");
908 #ifdef WITH_OLD_DEMIME
909 fprintf(f
, " Old_Demime");
911 #ifdef EXPERIMENTAL_SPF
912 fprintf(f
, " Experimental_SPF");
914 #ifdef EXPERIMENTAL_SRS
915 fprintf(f
, " Experimental_SRS");
917 #ifdef EXPERIMENTAL_BRIGHTMAIL
918 fprintf(f
, " Experimental_Brightmail");
920 #ifdef EXPERIMENTAL_DOMAINKEYS
921 fprintf(f
, " Experimental_DomainKeys");
925 fprintf(f
, "Lookups:");
926 #ifdef LOOKUP_LSEARCH
927 fprintf(f
, " lsearch wildlsearch nwildlsearch iplsearch");
933 fprintf(f
, " dbm dbmnz");
936 fprintf(f
, " dnsdb");
938 #ifdef LOOKUP_DSEARCH
939 fprintf(f
, " dsearch");
942 fprintf(f
, " ibase");
945 fprintf(f
, " ldap ldapdn ldapm");
948 fprintf(f
, " mysql");
951 fprintf(f
, " nis nis0");
953 #ifdef LOOKUP_NISPLUS
954 fprintf(f
, " nisplus");
957 fprintf(f
, " oracle");
960 fprintf(f
, " passwd");
963 fprintf(f
, " pgsql");
966 fprintf(f
, " sqlite");
969 fprintf(f
, " testdb");
972 fprintf(f
, " whoson");
976 fprintf(f
, "Authenticators:");
978 fprintf(f
, " cram_md5");
980 #ifdef AUTH_CYRUS_SASL
981 fprintf(f
, " cyrus_sasl");
984 fprintf(f
, " dovecot");
986 #ifdef AUTH_PLAINTEXT
987 fprintf(f
, " plaintext");
994 fprintf(f
, "Routers:");
996 fprintf(f
, " accept");
998 #ifdef ROUTER_DNSLOOKUP
999 fprintf(f
, " dnslookup");
1001 #ifdef ROUTER_IPLITERAL
1002 fprintf(f
, " ipliteral");
1004 #ifdef ROUTER_IPLOOKUP
1005 fprintf(f
, " iplookup");
1007 #ifdef ROUTER_MANUALROUTE
1008 fprintf(f
, " manualroute");
1010 #ifdef ROUTER_QUERYPROGRAM
1011 fprintf(f
, " queryprogram");
1013 #ifdef ROUTER_REDIRECT
1014 fprintf(f
, " redirect");
1018 fprintf(f
, "Transports:");
1019 #ifdef TRANSPORT_APPENDFILE
1020 fprintf(f
, " appendfile");
1021 #ifdef SUPPORT_MAILDIR
1022 fprintf(f
, "/maildir");
1024 #ifdef SUPPORT_MAILSTORE
1025 fprintf(f
, "/mailstore");
1031 #ifdef TRANSPORT_AUTOREPLY
1032 fprintf(f
, " autoreply");
1034 #ifdef TRANSPORT_LMTP
1035 fprintf(f
, " lmtp");
1037 #ifdef TRANSPORT_PIPE
1038 fprintf(f
, " pipe");
1040 #ifdef TRANSPORT_SMTP
1041 fprintf(f
, " smtp");
1045 if (fixed_never_users
[0] > 0)
1048 fprintf(f
, "Fixed never_users: ");
1049 for (i
= 1; i
<= (int)fixed_never_users
[0] - 1; i
++)
1050 fprintf(f
, "%d:", (unsigned int)fixed_never_users
[i
]);
1051 fprintf(f
, "%d\n", (unsigned int)fixed_never_users
[i
]);
1054 fprintf(f
, "Size of off_t: %d\n", sizeof(off_t
));
1060 /*************************************************
1061 * Quote a local part *
1062 *************************************************/
1064 /* This function is used when a sender address or a From: or Sender: header
1065 line is being created from the caller's login, or from an authenticated_id. It
1066 applies appropriate quoting rules for a local part.
1068 Argument: the local part
1069 Returns: the local part, quoted if necessary
1073 local_part_quote(uschar
*lpart
)
1075 BOOL needs_quote
= FALSE
;
1080 for (t
= lpart
; !needs_quote
&& *t
!= 0; t
++)
1082 needs_quote
= !isalnum(*t
) && strchr("!#$%&'*+-/=?^_`{|}~", *t
) == NULL
&&
1083 (*t
!= '.' || t
== lpart
|| t
[1] == 0);
1086 if (!needs_quote
) return lpart
;
1089 yield
= string_cat(NULL
, &size
, &ptr
, US
"\"", 1);
1093 uschar
*nq
= US
Ustrpbrk(lpart
, "\\\"");
1096 yield
= string_cat(yield
, &size
, &ptr
, lpart
, Ustrlen(lpart
));
1099 yield
= string_cat(yield
, &size
, &ptr
, lpart
, nq
- lpart
);
1100 yield
= string_cat(yield
, &size
, &ptr
, US
"\\", 1);
1101 yield
= string_cat(yield
, &size
, &ptr
, nq
, 1);
1105 yield
= string_cat(yield
, &size
, &ptr
, US
"\"", 1);
1113 /*************************************************
1114 * Load readline() functions *
1115 *************************************************/
1117 /* This function is called from testing executions that read data from stdin,
1118 but only when running as the calling user. Currently, only -be does this. The
1119 function loads the readline() function library and passes back the functions.
1120 On some systems, it needs the curses library, so load that too, but try without
1121 it if loading fails. All this functionality has to be requested at build time.
1124 fn_readline_ptr pointer to where to put the readline pointer
1125 fn_addhist_ptr pointer to where to put the addhistory function
1127 Returns: the dlopen handle or NULL on failure
1131 set_readline(char * (**fn_readline_ptr
)(char *),
1132 char * (**fn_addhist_ptr
)(char *))
1135 void *dlhandle_curses
= dlopen("libcurses.so", RTLD_GLOBAL
|RTLD_LAZY
);
1137 dlhandle
= dlopen("libreadline.so", RTLD_GLOBAL
|RTLD_NOW
);
1138 if (dlhandle_curses
!= NULL
) dlclose(dlhandle_curses
);
1140 if (dlhandle
!= NULL
)
1142 *fn_readline_ptr
= (char *(*)(char*))dlsym(dlhandle
, "readline");
1143 *fn_addhist_ptr
= (char *(*)(char*))dlsym(dlhandle
, "add_history");
1147 DEBUG(D_any
) debug_printf("failed to load readline: %s\n", dlerror());
1156 /*************************************************
1157 * Get a line from stdin for testing things *
1158 *************************************************/
1160 /* This function is called when running tests that can take a number of lines
1161 of input (for example, -be and -bt). It handles continuations and trailing
1162 spaces. And prompting and a blank line output on eof. If readline() is in use,
1163 the arguments are non-NULL and provide the relevant functions.
1166 fn_readline readline function or NULL
1167 fn_addhist addhist function or NULL
1169 Returns: pointer to dynamic memory, or NULL at end of file
1173 get_stdinput(char *(*fn_readline
)(char *), char *(*fn_addhist
)(char *))
1178 uschar
*yield
= NULL
;
1180 if (fn_readline
== NULL
) printf("> ");
1184 uschar buffer
[1024];
1188 char *readline_line
= NULL
;
1189 if (fn_readline
!= NULL
)
1191 if ((readline_line
= fn_readline((i
> 0)? "":"> ")) == NULL
) break;
1192 if (*readline_line
!= 0 && fn_addhist
!= NULL
) fn_addhist(readline_line
);
1193 p
= US readline_line
;
1198 /* readline() not in use */
1201 if (Ufgets(buffer
, sizeof(buffer
), stdin
) == NULL
) break;
1205 /* Handle the line */
1207 ss
= p
+ (int)Ustrlen(p
);
1208 while (ss
> p
&& isspace(ss
[-1])) ss
--;
1212 while (p
< ss
&& isspace(*p
)) p
++; /* leading space after cont */
1215 yield
= string_cat(yield
, &size
, &ptr
, p
, ss
- p
);
1218 if (fn_readline
!= NULL
) free(readline_line
);
1221 if (ss
== p
|| yield
[ptr
-1] != '\\')
1229 if (yield
== NULL
) printf("\n");
1235 /*************************************************
1236 * Entry point and high-level code *
1237 *************************************************/
1239 /* Entry point for the Exim mailer. Analyse the arguments and arrange to take
1240 the appropriate action. All the necessary functions are present in the one
1241 binary. I originally thought one should split it up, but it turns out that so
1242 much of the apparatus is needed in each chunk that one might as well just have
1243 it all available all the time, which then makes the coding easier as well.
1246 argc count of entries in argv
1247 argv argument strings, with argv[0] being the program name
1249 Returns: EXIT_SUCCESS if terminated successfully
1250 EXIT_FAILURE otherwise, except when a message has been sent
1251 to the sender, and -oee was given
1255 main(int argc
, char **cargv
)
1257 uschar
**argv
= USS cargv
;
1258 int arg_receive_timeout
= -1;
1259 int arg_smtp_receive_timeout
= -1;
1260 int arg_error_handling
= error_handling
;
1261 int filter_sfd
= -1;
1262 int filter_ufd
= -1;
1265 int list_queue_option
= 0;
1267 int msg_action_arg
= -1;
1268 int namelen
= (argv
[0] == NULL
)? 0 : Ustrlen(argv
[0]);
1269 int queue_only_reason
= 0;
1271 int perl_start_option
= 0;
1273 int recipients_arg
= argc
;
1274 int sender_address_domain
= 0;
1275 int test_retry_arg
= -1;
1276 int test_rewrite_arg
= -1;
1277 BOOL arg_queue_only
= FALSE
;
1278 BOOL bi_option
= FALSE
;
1279 BOOL checking
= FALSE
;
1280 BOOL count_queue
= FALSE
;
1281 BOOL expansion_test
= FALSE
;
1282 BOOL extract_recipients
= FALSE
;
1283 BOOL forced_delivery
= FALSE
;
1284 BOOL f_end_dot
= FALSE
;
1285 BOOL deliver_give_up
= FALSE
;
1286 BOOL list_queue
= FALSE
;
1287 BOOL list_options
= FALSE
;
1288 BOOL local_queue_only
;
1290 BOOL one_msg_action
= FALSE
;
1291 BOOL queue_only_set
= FALSE
;
1292 BOOL receiving_message
= TRUE
;
1293 BOOL sender_ident_set
= FALSE
;
1295 BOOL removed_privilege
= FALSE
;
1296 BOOL verify_address_mode
= FALSE
;
1297 BOOL verify_as_sender
= FALSE
;
1298 BOOL version_printed
= FALSE
;
1299 uschar
*alias_arg
= NULL
;
1300 uschar
*called_as
= US
"";
1301 uschar
*start_queue_run_id
= NULL
;
1302 uschar
*stop_queue_run_id
= NULL
;
1303 uschar
*ftest_domain
= NULL
;
1304 uschar
*ftest_localpart
= NULL
;
1305 uschar
*ftest_prefix
= NULL
;
1306 uschar
*ftest_suffix
= NULL
;
1307 uschar
*real_sender_address
;
1308 uschar
*originator_home
= US
"/";
1312 struct stat statbuf
;
1313 pid_t passed_qr_pid
= (pid_t
)0;
1314 int passed_qr_pipe
= -1;
1315 gid_t group_list
[NGROUPS_MAX
];
1317 /* Possible options for -R and -S */
1319 static uschar
*rsopts
[] = { US
"f", US
"ff", US
"r", US
"rf", US
"rff" };
1321 /* Need to define this in case we need to change the environment in order
1322 to get rid of a bogus time zone. We have to make it char rather than uschar
1323 because some OS define it in /usr/include/unistd.h. */
1325 extern char **environ
;
1327 /* If the Exim user and/or group and/or the configuration file owner/group were
1328 defined by ref:name at build time, we must now find the actual uid/gid values.
1329 This is a feature to make the lives of binary distributors easier. */
1331 #ifdef EXIM_USERNAME
1332 if (route_finduser(US EXIM_USERNAME
, &pw
, &exim_uid
))
1334 exim_gid
= pw
->pw_gid
;
1338 fprintf(stderr
, "exim: failed to find uid for user name \"%s\"\n",
1344 #ifdef EXIM_GROUPNAME
1345 if (!route_findgroup(US EXIM_GROUPNAME
, &exim_gid
))
1347 fprintf(stderr
, "exim: failed to find gid for group name \"%s\"\n",
1353 #ifdef CONFIGURE_OWNERNAME
1354 if (!route_finduser(US CONFIGURE_OWNERNAME
, NULL
, &config_uid
))
1356 fprintf(stderr
, "exim: failed to find uid for user name \"%s\"\n",
1357 CONFIGURE_OWNERNAME
);
1362 #ifdef CONFIGURE_GROUPNAME
1363 if (!route_findgroup(US CONFIGURE_GROUPNAME
, &config_gid
))
1365 fprintf(stderr
, "exim: failed to find gid for group name \"%s\"\n",
1366 CONFIGURE_GROUPNAME
);
1371 /* In the Cygwin environment, some initialization needs doing. It is fudged
1372 in by means of this macro. */
1378 /* Check a field which is patched when we are running Exim within its
1379 testing harness; do a fast initial check, and then the whole thing. */
1381 running_in_test_harness
=
1382 *running_status
== '<' && Ustrcmp(running_status
, "<<<testing>>>") == 0;
1384 /* The C standard says that the equivalent of setlocale(LC_ALL, "C") is obeyed
1385 at the start of a program; however, it seems that some environments do not
1386 follow this. A "strange" locale can affect the formatting of timestamps, so we
1389 setlocale(LC_ALL
, "C");
1391 /* Set up the default handler for timing using alarm(). */
1393 os_non_restarting_signal(SIGALRM
, sigalrm_handler
);
1395 /* Ensure we have a buffer for constructing log entries. Use malloc directly,
1396 because store_malloc writes a log entry on failure. */
1398 log_buffer
= (uschar
*)malloc(LOG_BUFFER_SIZE
);
1399 if (log_buffer
== NULL
)
1401 fprintf(stderr
, "exim: failed to get store for log buffer\n");
1405 /* Set log_stderr to stderr, provided that stderr exists. This gets reset to
1406 NULL when the daemon is run and the file is closed. We have to use this
1407 indirection, because some systems don't allow writing to the variable "stderr".
1410 if (fstat(fileno(stderr
), &statbuf
) >= 0) log_stderr
= stderr
;
1412 /* Arrange for the PCRE regex library to use our store functions. Note that
1413 the normal calls are actually macros that add additional arguments for
1414 debugging purposes so we have to assign specially constructed functions here.
1415 The default is to use store in the stacking pool, but this is overridden in the
1416 regex_must_compile() function. */
1418 pcre_malloc
= function_store_get
;
1419 pcre_free
= function_dummy_free
;
1421 /* Ensure there is a big buffer for temporary use in several places. It is put
1422 in malloc store so that it can be freed for enlargement if necessary. */
1424 big_buffer
= store_malloc(big_buffer_size
);
1426 /* Set up the handler for the data request signal, and set the initial
1427 descriptive text. */
1429 set_process_info("initializing");
1430 os_restarting_signal(SIGUSR1
, usr1_handler
);
1432 /* SIGHUP is used to get the daemon to reconfigure. It gets set as appropriate
1433 in the daemon code. For the rest of Exim's uses, we ignore it. */
1435 signal(SIGHUP
, SIG_IGN
);
1437 /* We don't want to die on pipe errors as the code is written to handle
1438 the write error instead. */
1440 signal(SIGPIPE
, SIG_IGN
);
1442 /* Under some circumstance on some OS, Exim can get called with SIGCHLD
1443 set to SIG_IGN. This causes subprocesses that complete before the parent
1444 process waits for them not to hang around, so when Exim calls wait(), nothing
1445 is there. The wait() code has been made robust against this, but let's ensure
1446 that SIGCHLD is set to SIG_DFL, because it's tidier to wait and get a process
1447 ending status. We use sigaction rather than plain signal() on those OS where
1448 SA_NOCLDWAIT exists, because we want to be sure it is turned off. (There was a
1449 problem on AIX with this.) */
1453 struct sigaction act
;
1454 act
.sa_handler
= SIG_DFL
;
1455 sigemptyset(&(act
.sa_mask
));
1457 sigaction(SIGCHLD
, &act
, NULL
);
1460 signal(SIGCHLD
, SIG_DFL
);
1463 /* Save the arguments for use if we re-exec exim as a daemon after receiving
1468 /* Set up the version number. Set up the leading 'E' for the external form of
1469 message ids, set the pointer to the internal form, and initialize it to
1470 indicate no message being processed. */
1473 message_id_option
[0] = '-';
1474 message_id_external
= message_id_option
+ 1;
1475 message_id_external
[0] = 'E';
1476 message_id
= message_id_external
+ 1;
1479 /* Set the umask to zero so that any files Exim creates using open() are
1480 created with the modes that it specifies. NOTE: Files created with fopen() have
1481 a problem, which was not recognized till rather late (February 2006). With this
1482 umask, such files will be world writeable. (They are all content scanning files
1483 in the spool directory, which isn't world-accessible, so this is not a
1484 disaster, but it's untidy.) I don't want to change this overall setting,
1485 however, because it will interact badly with the open() calls. Instead, there's
1486 now a function called modefopen() that fiddles with the umask while calling
1491 /* Precompile the regular expression for matching a message id. Keep this in
1492 step with the code that generates ids in the accept.c module. We need to do
1493 this here, because the -M options check their arguments for syntactic validity
1494 using mac_ismsgid, which uses this. */
1497 regex_must_compile(US
"^(?:[^\\W_]{6}-){2}[^\\W_]{2}$", FALSE
, TRUE
);
1499 /* Precompile the regular expression that is used for matching an SMTP error
1500 code, possibly extended, at the start of an error message. */
1503 regex_must_compile(US
"^\\d\\d\\d\\s(?:\\d\\.\\d\\d?\\d?\\.\\d\\d?\\d?\\s)?",
1506 /* If the program is called as "mailq" treat it as equivalent to "exim -bp";
1507 this seems to be a generally accepted convention, since one finds symbolic
1508 links called "mailq" in standard OS configurations. */
1510 if ((namelen
== 5 && Ustrcmp(argv
[0], "mailq") == 0) ||
1511 (namelen
> 5 && Ustrncmp(argv
[0] + namelen
- 6, "/mailq", 6) == 0))
1514 receiving_message
= FALSE
;
1515 called_as
= US
"-mailq";
1518 /* If the program is called as "rmail" treat it as equivalent to
1519 "exim -i -oee", thus allowing UUCP messages to be input using non-SMTP mode,
1520 i.e. preventing a single dot on a line from terminating the message, and
1521 returning with zero return code, even in cases of error (provided an error
1522 message has been sent). */
1524 if ((namelen
== 5 && Ustrcmp(argv
[0], "rmail") == 0) ||
1525 (namelen
> 5 && Ustrncmp(argv
[0] + namelen
- 6, "/rmail", 6) == 0))
1528 called_as
= US
"-rmail";
1529 errors_sender_rc
= EXIT_SUCCESS
;
1532 /* If the program is called as "rsmtp" treat it as equivalent to "exim -bS";
1533 this is a smail convention. */
1535 if ((namelen
== 5 && Ustrcmp(argv
[0], "rsmtp") == 0) ||
1536 (namelen
> 5 && Ustrncmp(argv
[0] + namelen
- 6, "/rsmtp", 6) == 0))
1538 smtp_input
= smtp_batched_input
= TRUE
;
1539 called_as
= US
"-rsmtp";
1542 /* If the program is called as "runq" treat it as equivalent to "exim -q";
1543 this is a smail convention. */
1545 if ((namelen
== 4 && Ustrcmp(argv
[0], "runq") == 0) ||
1546 (namelen
> 4 && Ustrncmp(argv
[0] + namelen
- 5, "/runq", 5) == 0))
1549 receiving_message
= FALSE
;
1550 called_as
= US
"-runq";
1553 /* If the program is called as "newaliases" treat it as equivalent to
1554 "exim -bi"; this is a sendmail convention. */
1556 if ((namelen
== 10 && Ustrcmp(argv
[0], "newaliases") == 0) ||
1557 (namelen
> 10 && Ustrncmp(argv
[0] + namelen
- 11, "/newaliases", 11) == 0))
1560 receiving_message
= FALSE
;
1561 called_as
= US
"-newaliases";
1564 /* Save the original effective uid for a couple of uses later. It should
1565 normally be root, but in some esoteric environments it may not be. */
1567 original_euid
= geteuid();
1569 /* Get the real uid and gid. If the caller is root, force the effective uid/gid
1570 to be the same as the real ones. This makes a difference only if Exim is setuid
1571 (or setgid) to something other than root, which could be the case in some
1572 special configurations. */
1574 real_uid
= getuid();
1575 real_gid
= getgid();
1577 if (real_uid
== root_uid
)
1583 /* If neither the original real uid nor the original euid was root, Exim is
1584 running in an unprivileged state. */
1586 unprivileged
= (real_uid
!= root_uid
&& original_euid
!= root_uid
);
1588 /* If the first argument is --help, pretend there are no arguments. This will
1589 cause a brief message to be given. */
1591 if (argc
> 1 && Ustrcmp(argv
[1], "--help") == 0) argc
= 1;
1593 /* Scan the program's arguments. Some can be dealt with right away; others are
1594 simply recorded for checking and handling afterwards. Do a high-level switch
1595 on the second character (the one after '-'), to save some effort. */
1597 for (i
= 1; i
< argc
; i
++)
1599 BOOL badarg
= FALSE
;
1600 uschar
*arg
= argv
[i
];
1604 /* An argument not starting with '-' is the start of a recipients list;
1605 break out of the options-scanning loop. */
1613 /* An option consistion of -- terminates the options */
1615 if (Ustrcmp(arg
, "--") == 0)
1617 recipients_arg
= i
+ 1;
1621 /* Handle flagged options */
1623 switchchar
= arg
[1];
1626 /* Make all -ex options synonymous with -oex arguments, since that
1627 is assumed by various callers. Also make -qR options synonymous with -R
1628 options, as that seems to be required as well. Allow for -qqR too, and
1629 the same for -S options. */
1631 if (Ustrncmp(arg
+1, "oe", 2) == 0 ||
1632 Ustrncmp(arg
+1, "qR", 2) == 0 ||
1633 Ustrncmp(arg
+1, "qS", 2) == 0)
1635 switchchar
= arg
[2];
1638 else if (Ustrncmp(arg
+1, "qqR", 3) == 0 || Ustrncmp(arg
+1, "qqS", 3) == 0)
1640 switchchar
= arg
[3];
1642 queue_2stage
= TRUE
;
1645 /* Make -r synonymous with -f, since it is a documented alias */
1647 else if (arg
[1] == 'r') switchchar
= 'f';
1649 /* Make -ov synonymous with -v */
1651 else if (Ustrcmp(arg
, "-ov") == 0)
1657 /* High-level switch on active initial letter */
1661 /* -Btype is a sendmail option for 7bit/8bit setting. Exim is 8-bit clean
1662 so has no need of it. */
1665 if (*argrest
== 0) i
++; /* Skip over the type */
1670 receiving_message
= FALSE
; /* Reset TRUE for -bm, -bS, -bs below */
1672 /* -bd: Run in daemon mode, awaiting SMTP connections.
1673 -bdf: Ditto, but in the foreground.
1676 if (*argrest
== 'd')
1678 daemon_listen
= TRUE
;
1679 if (*(++argrest
) == 'f') background_daemon
= FALSE
;
1680 else if (*argrest
!= 0) { badarg
= TRUE
; break; }
1683 /* -be: Run in expansion test mode */
1685 else if (*argrest
== 'e')
1686 expansion_test
= checking
= TRUE
;
1688 /* -bF: Run system filter test */
1690 else if (*argrest
== 'F')
1692 filter_test
|= FTEST_SYSTEM
;
1693 if (*(++argrest
) != 0) { badarg
= TRUE
; break; }
1694 if (++i
< argc
) filter_test_sfile
= argv
[i
]; else
1696 fprintf(stderr
, "exim: file name expected after %s\n", argv
[i
-1]);
1701 /* -bf: Run user filter test
1702 -bfd: Set domain for filter testing
1703 -bfl: Set local part for filter testing
1704 -bfp: Set prefix for filter testing
1705 -bfs: Set suffix for filter testing
1708 else if (*argrest
== 'f')
1710 if (*(++argrest
) == 0)
1712 filter_test
|= FTEST_USER
;
1713 if (++i
< argc
) filter_test_ufile
= argv
[i
]; else
1715 fprintf(stderr
, "exim: file name expected after %s\n", argv
[i
-1]);
1723 fprintf(stderr
, "exim: string expected after %s\n", arg
);
1726 if (Ustrcmp(argrest
, "d") == 0) ftest_domain
= argv
[i
];
1727 else if (Ustrcmp(argrest
, "l") == 0) ftest_localpart
= argv
[i
];
1728 else if (Ustrcmp(argrest
, "p") == 0) ftest_prefix
= argv
[i
];
1729 else if (Ustrcmp(argrest
, "s") == 0) ftest_suffix
= argv
[i
];
1730 else { badarg
= TRUE
; break; }
1734 /* -bh: Host checking - an IP address must follow. */
1736 else if (Ustrcmp(argrest
, "h") == 0 || Ustrcmp(argrest
, "hc") == 0)
1738 if (++i
>= argc
) { badarg
= TRUE
; break; }
1739 sender_host_address
= argv
[i
];
1740 host_checking
= checking
= log_testing_mode
= TRUE
;
1741 host_checking_callout
= argrest
[1] == 'c';
1744 /* -bi: This option is used by sendmail to initialize *the* alias file,
1745 though it has the -oA option to specify a different file. Exim has no
1746 concept of *the* alias file, but since Sun's YP make script calls
1747 sendmail this way, some support must be provided. */
1749 else if (Ustrcmp(argrest
, "i") == 0) bi_option
= TRUE
;
1751 /* -bm: Accept and deliver message - the default option. Reinstate
1752 receiving_message, which got turned off for all -b options. */
1754 else if (Ustrcmp(argrest
, "m") == 0) receiving_message
= TRUE
;
1756 /* -bnq: For locally originating messages, do not qualify unqualified
1757 addresses. In the envelope, this causes errors; in header lines they
1760 else if (Ustrcmp(argrest
, "nq") == 0)
1762 allow_unqualified_sender
= FALSE
;
1763 allow_unqualified_recipient
= FALSE
;
1766 /* -bpxx: List the contents of the mail queue, in various forms. If
1767 the option is -bpc, just a queue count is needed. Otherwise, if the
1768 first letter after p is r, then order is random. */
1770 else if (*argrest
== 'p')
1772 if (*(++argrest
) == 'c')
1775 if (*(++argrest
) != 0) badarg
= TRUE
;
1779 if (*argrest
== 'r')
1781 list_queue_option
= 8;
1784 else list_queue_option
= 0;
1788 /* -bp: List the contents of the mail queue, top-level only */
1790 if (*argrest
== 0) {}
1792 /* -bpu: List the contents of the mail queue, top-level undelivered */
1794 else if (Ustrcmp(argrest
, "u") == 0) list_queue_option
+= 1;
1796 /* -bpa: List the contents of the mail queue, including all delivered */
1798 else if (Ustrcmp(argrest
, "a") == 0) list_queue_option
+= 2;
1800 /* Unknown after -bp[r] */
1810 /* -bP: List the configuration variables given as the address list.
1811 Force -v, so configuration errors get displayed. */
1813 else if (Ustrcmp(argrest
, "P") == 0)
1815 list_options
= TRUE
;
1816 debug_selector
|= D_v
;
1817 debug_file
= stderr
;
1820 /* -brt: Test retry configuration lookup */
1822 else if (Ustrcmp(argrest
, "rt") == 0)
1824 test_retry_arg
= i
+ 1;
1828 /* -brw: Test rewrite configuration */
1830 else if (Ustrcmp(argrest
, "rw") == 0)
1832 test_rewrite_arg
= i
+ 1;
1836 /* -bS: Read SMTP commands on standard input, but produce no replies -
1837 all errors are reported by sending messages. */
1839 else if (Ustrcmp(argrest
, "S") == 0)
1840 smtp_input
= smtp_batched_input
= receiving_message
= TRUE
;
1842 /* -bs: Read SMTP commands on standard input and produce SMTP replies
1843 on standard output. */
1845 else if (Ustrcmp(argrest
, "s") == 0) smtp_input
= receiving_message
= TRUE
;
1847 /* -bt: address testing mode */
1849 else if (Ustrcmp(argrest
, "t") == 0)
1850 address_test_mode
= checking
= log_testing_mode
= TRUE
;
1852 /* -bv: verify addresses */
1854 else if (Ustrcmp(argrest
, "v") == 0)
1855 verify_address_mode
= checking
= log_testing_mode
= TRUE
;
1857 /* -bvs: verify sender addresses */
1859 else if (Ustrcmp(argrest
, "vs") == 0)
1861 verify_address_mode
= checking
= log_testing_mode
= TRUE
;
1862 verify_as_sender
= TRUE
;
1865 /* -bV: Print version string and support details */
1867 else if (Ustrcmp(argrest
, "V") == 0)
1869 printf("Exim version %s #%s built %s\n", version_string
,
1870 version_cnumber
, version_date
);
1871 printf("%s\n", CS version_copyright
);
1872 version_printed
= TRUE
;
1873 show_whats_supported(stdout
);
1880 /* -C: change configuration file list; ignore if it isn't really
1881 a change! Enforce a prefix check if required. */
1886 if(++i
< argc
) argrest
= argv
[i
]; else
1887 { badarg
= TRUE
; break; }
1889 if (Ustrcmp(config_main_filelist
, argrest
) != 0)
1891 #ifdef ALT_CONFIG_PREFIX
1893 int len
= Ustrlen(ALT_CONFIG_PREFIX
);
1894 uschar
*list
= argrest
;
1896 while((filename
= string_nextinlist(&list
, &sep
, big_buffer
,
1897 big_buffer_size
)) != NULL
)
1899 if ((Ustrlen(filename
) < len
||
1900 Ustrncmp(filename
, ALT_CONFIG_PREFIX
, len
) != 0 ||
1901 Ustrstr(filename
, "/../") != NULL
) &&
1902 (Ustrcmp(filename
, "/dev/null") != 0 || real_uid
!= root_uid
))
1904 fprintf(stderr
, "-C Permission denied\n");
1910 config_main_filelist
= argrest
;
1911 config_changed
= TRUE
;
1916 /* -D: set up a macro definition */
1919 #ifdef DISABLE_D_OPTION
1920 fprintf(stderr
, "exim: -D is not available in this Exim binary\n");
1925 macro_item
*mlast
= NULL
;
1928 uschar
*s
= argrest
;
1930 while (isspace(*s
)) s
++;
1932 if (*s
< 'A' || *s
> 'Z')
1934 fprintf(stderr
, "exim: macro name set by -D must start with "
1935 "an upper case letter\n");
1939 while (isalnum(*s
) || *s
== '_')
1941 if (ptr
< sizeof(name
)-1) name
[ptr
++] = *s
;
1945 if (ptr
== 0) { badarg
= TRUE
; break; }
1946 while (isspace(*s
)) s
++;
1949 if (*s
++ != '=') { badarg
= TRUE
; break; }
1950 while (isspace(*s
)) s
++;
1953 for (m
= macros
; m
!= NULL
; m
= m
->next
)
1955 if (Ustrcmp(m
->name
, name
) == 0)
1957 fprintf(stderr
, "exim: duplicated -D in command line\n");
1963 m
= store_get(sizeof(macro_item
) + Ustrlen(name
));
1965 m
->command_line
= TRUE
;
1966 if (mlast
== NULL
) macros
= m
; else mlast
->next
= m
;
1967 Ustrcpy(m
->name
, name
);
1968 m
->replacement
= string_copy(s
);
1970 if (clmacro_count
>= MAX_CLMACROS
)
1972 fprintf(stderr
, "exim: too many -D options on command line\n");
1975 clmacros
[clmacro_count
++] = string_sprintf("-D%s=%s", m
->name
,
1981 /* -d: Set debug level (see also -v below) or set the drop_cr option.
1982 The latter is now a no-op, retained for compatibility only. If -dd is used,
1983 debugging subprocesses of the daemon is disabled. */
1986 if (Ustrcmp(argrest
, "ropcr") == 0)
1988 /* drop_cr = TRUE; */
1991 /* Use an intermediate variable so that we don't set debugging while
1992 decoding the debugging bits. */
1996 unsigned int selector
= D_default
;
1999 if (*argrest
== 'd')
2001 debug_daemon
= TRUE
;
2005 decode_bits(&selector
, NULL
, D_memory
, 0, argrest
, debug_options
,
2006 debug_options_count
, US
"debug");
2007 debug_selector
= selector
;
2012 /* -E: This is a local error message. This option is not intended for
2013 external use at all, but is not restricted to trusted callers because it
2014 does no harm (just suppresses certain error messages) and if Exim is run
2015 not setuid root it won't always be trusted when it generates error
2016 messages using this option. If there is a message id following -E, point
2017 message_reference at it, for logging. */
2020 local_error_message
= TRUE
;
2021 if (mac_ismsgid(argrest
)) message_reference
= argrest
;
2025 /* -ex: The vacation program calls sendmail with the undocumented "-eq"
2026 option, so it looks as if historically the -oex options are also callable
2027 without the leading -o. So we have to accept them. Before the switch,
2028 anything starting -oe has been converted to -e. Exim does not support all
2029 of the sendmail error options. */
2032 if (Ustrcmp(argrest
, "e") == 0)
2034 arg_error_handling
= ERRORS_SENDER
;
2035 errors_sender_rc
= EXIT_SUCCESS
;
2037 else if (Ustrcmp(argrest
, "m") == 0) arg_error_handling
= ERRORS_SENDER
;
2038 else if (Ustrcmp(argrest
, "p") == 0) arg_error_handling
= ERRORS_STDERR
;
2039 else if (Ustrcmp(argrest
, "q") == 0) arg_error_handling
= ERRORS_STDERR
;
2040 else if (Ustrcmp(argrest
, "w") == 0) arg_error_handling
= ERRORS_SENDER
;
2045 /* -F: Set sender's full name, used instead of the gecos entry from
2046 the password file. Since users can usually alter their gecos entries,
2047 there's no security involved in using this instead. The data can follow
2048 the -F or be in the next argument. */
2053 if(++i
< argc
) argrest
= argv
[i
]; else
2054 { badarg
= TRUE
; break; }
2056 originator_name
= argrest
;
2057 sender_name_forced
= TRUE
;
2061 /* -f: Set sender's address - this value is only actually used if Exim is
2062 run by a trusted user, or if untrusted_set_sender is set and matches the
2063 address, except that the null address can always be set by any user. The
2064 test for this happens later, when the value given here is ignored when not
2065 permitted. For an untrusted user, the actual sender is still put in Sender:
2066 if it doesn't match the From: header (unless no_local_from_check is set).
2067 The data can follow the -f or be in the next argument. The -r switch is an
2068 obsolete form of -f but since there appear to be programs out there that
2069 use anything that sendmail has ever supported, better accept it - the
2070 synonymizing is done before the switch above.
2072 At this stage, we must allow domain literal addresses, because we don't
2073 know what the setting of allow_domain_literals is yet. Ditto for trailing
2074 dots and strip_trailing_dot. */
2082 if (i
+1 < argc
) argrest
= argv
[++i
]; else
2083 { badarg
= TRUE
; break; }
2087 sender_address
= string_sprintf(""); /* Ensure writeable memory */
2091 uschar
*temp
= argrest
+ Ustrlen(argrest
) - 1;
2092 while (temp
>= argrest
&& isspace(*temp
)) temp
--;
2093 if (temp
>= argrest
&& *temp
== '.') f_end_dot
= TRUE
;
2094 allow_domain_literals
= TRUE
;
2095 strip_trailing_dot
= TRUE
;
2096 sender_address
= parse_extract_address(argrest
, &errmess
, &start
, &end
,
2097 &sender_address_domain
, TRUE
);
2098 allow_domain_literals
= FALSE
;
2099 strip_trailing_dot
= FALSE
;
2100 if (sender_address
== NULL
)
2102 fprintf(stderr
, "exim: bad -f address \"%s\": %s\n", argrest
, errmess
);
2103 return EXIT_FAILURE
;
2106 sender_address_forced
= TRUE
;
2110 /* This is some Sendmail thing which can be ignored */
2115 /* -h: Set the hop count for an incoming message. Exim does not currently
2116 support this; it always computes it by counting the Received: headers.
2117 To put it in will require a change to the spool header file format. */
2122 if(++i
< argc
) argrest
= argv
[i
]; else
2123 { badarg
= TRUE
; break; }
2125 if (!isdigit(*argrest
)) badarg
= TRUE
;
2129 /* -i: Set flag so dot doesn't end non-SMTP input (same as -oi, seems
2130 not to be documented for sendmail but mailx (at least) uses it) */
2133 if (*argrest
== 0) dot_ends
= FALSE
; else badarg
= TRUE
;
2138 receiving_message
= FALSE
;
2140 /* -MC: continue delivery of another message via an existing open
2141 file descriptor. This option is used for an internal call by the
2142 smtp transport when there is a pending message waiting to go to an
2143 address to which it has got a connection. Five subsequent arguments are
2144 required: transport name, host name, IP address, sequence number, and
2145 message_id. Transports may decline to create new processes if the sequence
2146 number gets too big. The channel is stdin. This (-MC) must be the last
2147 argument. There's a subsequent check that the real-uid is privileged.
2149 If we are running in the test harness. delay for a bit, to let the process
2150 that set this one up complete. This makes for repeatability of the logging,
2153 if (Ustrcmp(argrest
, "C") == 0)
2157 fprintf(stderr
, "exim: too many or too few arguments after -MC\n");
2158 return EXIT_FAILURE
;
2161 if (msg_action_arg
>= 0)
2163 fprintf(stderr
, "exim: incompatible arguments\n");
2164 return EXIT_FAILURE
;
2167 continue_transport
= argv
[++i
];
2168 continue_hostname
= argv
[++i
];
2169 continue_host_address
= argv
[++i
];
2170 continue_sequence
= Uatoi(argv
[++i
]);
2171 msg_action
= MSG_DELIVER
;
2172 msg_action_arg
= ++i
;
2173 forced_delivery
= TRUE
;
2174 queue_run_pid
= passed_qr_pid
;
2175 queue_run_pipe
= passed_qr_pipe
;
2177 if (!mac_ismsgid(argv
[i
]))
2179 fprintf(stderr
, "exim: malformed message id %s after -MC option\n",
2181 return EXIT_FAILURE
;
2184 if (running_in_test_harness
) millisleep(500);
2188 /* -MCA: set the smtp_authenticated flag; this is useful only when it
2189 precedes -MC (see above). The flag indicates that the host to which
2190 Exim is connected has accepted an AUTH sequence. */
2192 else if (Ustrcmp(argrest
, "CA") == 0)
2194 smtp_authenticated
= TRUE
;
2198 /* -MCP: set the smtp_use_pipelining flag; this is useful only when
2199 it preceded -MC (see above) */
2201 else if (Ustrcmp(argrest
, "CP") == 0)
2203 smtp_use_pipelining
= TRUE
;
2207 /* -MCQ: pass on the pid of the queue-running process that started
2208 this chain of deliveries and the fd of its synchronizing pipe; this
2209 is useful only when it precedes -MC (see above) */
2211 else if (Ustrcmp(argrest
, "CQ") == 0)
2213 if(++i
< argc
) passed_qr_pid
= (pid_t
)(Uatol(argv
[i
]));
2215 if(++i
< argc
) passed_qr_pipe
= (int)(Uatol(argv
[i
]));
2220 /* -MCS: set the smtp_use_size flag; this is useful only when it
2221 precedes -MC (see above) */
2223 else if (Ustrcmp(argrest
, "CS") == 0)
2225 smtp_use_size
= TRUE
;
2229 /* -MCT: set the tls_offered flag; this is useful only when it
2230 precedes -MC (see above). The flag indicates that the host to which
2231 Exim is connected has offered TLS support. */
2234 else if (Ustrcmp(argrest
, "CT") == 0)
2241 /* -M[x]: various operations on the following list of message ids:
2242 -M deliver the messages, ignoring next retry times and thawing
2243 -Mc deliver the messages, checking next retry times, no thawing
2244 -Mf freeze the messages
2245 -Mg give up on the messages
2246 -Mt thaw the messages
2247 -Mrm remove the messages
2248 In the above cases, this must be the last option. There are also the
2249 following options which are followed by a single message id, and which
2250 act on that message. Some of them use the "recipient" addresses as well.
2251 -Mar add recipient(s)
2252 -Mmad mark all recipients delivered
2253 -Mmd mark recipients(s) delivered
2255 -Mset load a message for use with -be
2261 else if (*argrest
== 0)
2263 msg_action
= MSG_DELIVER
;
2264 forced_delivery
= deliver_force_thaw
= TRUE
;
2266 else if (Ustrcmp(argrest
, "ar") == 0)
2268 msg_action
= MSG_ADD_RECIPIENT
;
2269 one_msg_action
= TRUE
;
2271 else if (Ustrcmp(argrest
, "c") == 0) msg_action
= MSG_DELIVER
;
2272 else if (Ustrcmp(argrest
, "es") == 0)
2274 msg_action
= MSG_EDIT_SENDER
;
2275 one_msg_action
= TRUE
;
2277 else if (Ustrcmp(argrest
, "f") == 0) msg_action
= MSG_FREEZE
;
2278 else if (Ustrcmp(argrest
, "g") == 0)
2280 msg_action
= MSG_DELIVER
;
2281 deliver_give_up
= TRUE
;
2283 else if (Ustrcmp(argrest
, "mad") == 0)
2285 msg_action
= MSG_MARK_ALL_DELIVERED
;
2287 else if (Ustrcmp(argrest
, "md") == 0)
2289 msg_action
= MSG_MARK_DELIVERED
;
2290 one_msg_action
= TRUE
;
2292 else if (Ustrcmp(argrest
, "rm") == 0) msg_action
= MSG_REMOVE
;
2293 else if (Ustrcmp(argrest
, "set") == 0)
2295 msg_action
= MSG_LOAD
;
2296 one_msg_action
= TRUE
;
2298 else if (Ustrcmp(argrest
, "t") == 0) msg_action
= MSG_THAW
;
2299 else if (Ustrcmp(argrest
, "vb") == 0)
2301 msg_action
= MSG_SHOW_BODY
;
2302 one_msg_action
= TRUE
;
2304 else if (Ustrcmp(argrest
, "vh") == 0)
2306 msg_action
= MSG_SHOW_HEADER
;
2307 one_msg_action
= TRUE
;
2309 else if (Ustrcmp(argrest
, "vl") == 0)
2311 msg_action
= MSG_SHOW_LOG
;
2312 one_msg_action
= TRUE
;
2314 else { badarg
= TRUE
; break; }
2316 /* All the -Mxx options require at least one message id. */
2318 msg_action_arg
= i
+ 1;
2319 if (msg_action_arg
>= argc
)
2321 fprintf(stderr
, "exim: no message ids given after %s option\n", arg
);
2322 return EXIT_FAILURE
;
2325 /* Some require only message ids to follow */
2327 if (!one_msg_action
)
2330 for (j
= msg_action_arg
; j
< argc
; j
++) if (!mac_ismsgid(argv
[j
]))
2332 fprintf(stderr
, "exim: malformed message id %s after %s option\n",
2334 return EXIT_FAILURE
;
2336 goto END_ARG
; /* Remaining args are ids */
2339 /* Others require only one message id, possibly followed by addresses,
2340 which will be handled as normal arguments. */
2344 if (!mac_ismsgid(argv
[msg_action_arg
]))
2346 fprintf(stderr
, "exim: malformed message id %s after %s option\n",
2347 argv
[msg_action_arg
], arg
);
2348 return EXIT_FAILURE
;
2355 /* Some programs seem to call the -om option without the leading o;
2356 for sendmail it askes for "me too". Exim always does this. */
2359 if (*argrest
!= 0) badarg
= TRUE
;
2363 /* -N: don't do delivery - a debugging option that stops transports doing
2364 their thing. It implies debugging at the D_v level. */
2369 dont_deliver
= TRUE
;
2370 debug_selector
|= D_v
;
2371 debug_file
= stderr
;
2377 /* -n: This means "don't alias" in sendmail, apparently. Just ignore
2383 /* -O: Just ignore it. In sendmail, apparently -O option=value means set
2384 option to the specified value. This form uses long names. We need to handle
2385 -O option=value and -Ooption=value. */
2392 fprintf(stderr
, "exim: string expected after -O\n");
2400 /* -oA: Set an argument for the bi command (sendmail's "alternate alias
2403 if (*argrest
== 'A')
2405 alias_arg
= argrest
+ 1;
2406 if (alias_arg
[0] == 0)
2408 if (i
+1 < argc
) alias_arg
= argv
[++i
]; else
2410 fprintf(stderr
, "exim: string expected after -oA\n");
2416 /* -oB: Set a connection message max value for remote deliveries */
2418 else if (*argrest
== 'B')
2420 uschar
*p
= argrest
+ 1;
2423 if (i
+1 < argc
&& isdigit((argv
[i
+1][0]))) p
= argv
[++i
]; else
2425 connection_max_messages
= 1;
2434 fprintf(stderr
, "exim: number expected after -oB\n");
2437 connection_max_messages
= Uatoi(p
);
2441 /* -odb: background delivery */
2443 else if (Ustrcmp(argrest
, "db") == 0)
2445 synchronous_delivery
= FALSE
;
2446 arg_queue_only
= FALSE
;
2447 queue_only_set
= TRUE
;
2450 /* -odf: foreground delivery (smail-compatible option); same effect as
2451 -odi: interactive (synchronous) delivery (sendmail-compatible option)
2454 else if (Ustrcmp(argrest
, "df") == 0 || Ustrcmp(argrest
, "di") == 0)
2456 synchronous_delivery
= TRUE
;
2457 arg_queue_only
= FALSE
;
2458 queue_only_set
= TRUE
;
2461 /* -odq: queue only */
2463 else if (Ustrcmp(argrest
, "dq") == 0)
2465 synchronous_delivery
= FALSE
;
2466 arg_queue_only
= TRUE
;
2467 queue_only_set
= TRUE
;
2470 /* -odqs: queue SMTP only - do local deliveries and remote routing,
2471 but no remote delivery */
2473 else if (Ustrcmp(argrest
, "dqs") == 0)
2476 arg_queue_only
= FALSE
;
2477 queue_only_set
= TRUE
;
2480 /* -oex: Sendmail error flags. As these are also accepted without the
2481 leading -o prefix, for compatibility with vacation and other callers,
2482 they are handled with -e above. */
2484 /* -oi: Set flag so dot doesn't end non-SMTP input (same as -i)
2485 -oitrue: Another sendmail syntax for the same */
2487 else if (Ustrcmp(argrest
, "i") == 0 ||
2488 Ustrcmp(argrest
, "itrue") == 0)
2491 /* -oM*: Set various characteristics for an incoming message; actually
2492 acted on for trusted callers only. */
2494 else if (*argrest
== 'M')
2498 fprintf(stderr
, "exim: data expected after -o%s\n", argrest
);
2502 /* -oMa: Set sender host address */
2504 if (Ustrcmp(argrest
, "Ma") == 0) sender_host_address
= argv
[++i
];
2506 /* -oMaa: Set authenticator name */
2508 else if (Ustrcmp(argrest
, "Maa") == 0)
2509 sender_host_authenticated
= argv
[++i
];
2511 /* -oMas: setting authenticated sender */
2513 else if (Ustrcmp(argrest
, "Mas") == 0) authenticated_sender
= argv
[++i
];
2515 /* -oMai: setting authenticated id */
2517 else if (Ustrcmp(argrest
, "Mai") == 0) authenticated_id
= argv
[++i
];
2519 /* -oMi: Set incoming interface address */
2521 else if (Ustrcmp(argrest
, "Mi") == 0) interface_address
= argv
[++i
];
2523 /* -oMr: Received protocol */
2525 else if (Ustrcmp(argrest
, "Mr") == 0) received_protocol
= argv
[++i
];
2527 /* -oMs: Set sender host name */
2529 else if (Ustrcmp(argrest
, "Ms") == 0) sender_host_name
= argv
[++i
];
2531 /* -oMt: Set sender ident */
2533 else if (Ustrcmp(argrest
, "Mt") == 0)
2535 sender_ident_set
= TRUE
;
2536 sender_ident
= argv
[++i
];
2539 /* Else a bad argument */
2548 /* -om: Me-too flag for aliases. Exim always does this. Some programs
2549 seem to call this as -m (undocumented), so that is also accepted (see
2552 else if (Ustrcmp(argrest
, "m") == 0) {}
2554 /* -oo: An ancient flag for old-style addresses which still seems to
2555 crop up in some calls (see in SCO). */
2557 else if (Ustrcmp(argrest
, "o") == 0) {}
2559 /* -oP <name>: set pid file path for daemon */
2561 else if (Ustrcmp(argrest
, "P") == 0)
2562 override_pid_file_path
= argv
[++i
];
2564 /* -or <n>: set timeout for non-SMTP acceptance
2565 -os <n>: set timeout for SMTP acceptance */
2567 else if (*argrest
== 'r' || *argrest
== 's')
2569 int *tp
= (*argrest
== 'r')?
2570 &arg_receive_timeout
: &arg_smtp_receive_timeout
;
2571 if (argrest
[1] == 0)
2573 if (i
+1 < argc
) *tp
= readconf_readtime(argv
[++i
], 0, FALSE
);
2575 else *tp
= readconf_readtime(argrest
+ 1, 0, FALSE
);
2578 fprintf(stderr
, "exim: bad time value %s: abandoned\n", argv
[i
]);
2583 /* -oX <list>: Override local_interfaces and/or default daemon ports */
2585 else if (Ustrcmp(argrest
, "X") == 0)
2586 override_local_interfaces
= argv
[++i
];
2588 /* Unknown -o argument */
2594 /* -ps: force Perl startup; -pd force delayed Perl startup */
2598 if (*argrest
== 's' && argrest
[1] == 0)
2600 perl_start_option
= 1;
2603 if (*argrest
== 'd' && argrest
[1] == 0)
2605 perl_start_option
= -1;
2610 /* -panythingelse is taken as the Sendmail-compatible argument -prval:sval,
2611 which sets the host protocol and host name */
2615 if (i
+1 < argc
) argrest
= argv
[++i
]; else
2616 { badarg
= TRUE
; break; }
2621 uschar
*hn
= Ustrchr(argrest
, ':');
2624 received_protocol
= argrest
;
2628 received_protocol
= string_copyn(argrest
, hn
- argrest
);
2629 sender_host_name
= hn
+ 1;
2636 receiving_message
= FALSE
;
2638 /* -qq...: Do queue runs in a 2-stage manner */
2640 if (*argrest
== 'q')
2642 queue_2stage
= TRUE
;
2646 /* -qi...: Do only first (initial) deliveries */
2648 if (*argrest
== 'i')
2650 queue_run_first_delivery
= TRUE
;
2654 /* -qf...: Run the queue, forcing deliveries
2655 -qff..: Ditto, forcing thawing as well */
2657 if (*argrest
== 'f')
2659 queue_run_force
= TRUE
;
2660 if (*(++argrest
) == 'f')
2662 deliver_force_thaw
= TRUE
;
2667 /* -q[f][f]l...: Run the queue only on local deliveries */
2669 if (*argrest
== 'l')
2671 queue_run_local
= TRUE
;
2675 /* -q[f][f][l]: Run the queue, optionally forced, optionally local only,
2676 optionally starting from a given message id. */
2678 if (*argrest
== 0 &&
2679 (i
+ 1 >= argc
|| argv
[i
+1][0] == '-' || mac_ismsgid(argv
[i
+1])))
2682 if (i
+1 < argc
&& mac_ismsgid(argv
[i
+1]))
2683 start_queue_run_id
= argv
[++i
];
2684 if (i
+1 < argc
&& mac_ismsgid(argv
[i
+1]))
2685 stop_queue_run_id
= argv
[++i
];
2688 /* -q[f][f][l]<n>: Run the queue at regular intervals, optionally forced,
2689 optionally local only. */
2694 queue_interval
= readconf_readtime(argrest
, 0, FALSE
);
2696 queue_interval
= readconf_readtime(argv
[++i
], 0, FALSE
);
2697 if (queue_interval
<= 0)
2699 fprintf(stderr
, "exim: bad time value %s: abandoned\n", argv
[i
]);
2706 case 'R': /* Synonymous with -qR... */
2707 receiving_message
= FALSE
;
2709 /* -Rf: As -R (below) but force all deliveries,
2710 -Rff: Ditto, but also thaw all frozen messages,
2711 -Rr: String is regex
2712 -Rrf: Regex and force
2713 -Rrff: Regex and force and thaw
2715 in all cases provided there are no further characters in this
2721 for (i
= 0; i
< sizeof(rsopts
)/sizeof(uschar
*); i
++)
2723 if (Ustrcmp(argrest
, rsopts
[i
]) == 0)
2725 if (i
!= 2) queue_run_force
= TRUE
;
2726 if (i
>= 2) deliver_selectstring_regex
= TRUE
;
2727 if (i
== 1 || i
== 4) deliver_force_thaw
= TRUE
;
2728 argrest
+= Ustrlen(rsopts
[i
]);
2733 /* -R: Set string to match in addresses for forced queue run to
2734 pick out particular messages. */
2738 if (i
+1 < argc
) deliver_selectstring
= argv
[++i
]; else
2740 fprintf(stderr
, "exim: string expected after -R\n");
2744 else deliver_selectstring
= argrest
;
2745 if (queue_interval
< 0) queue_interval
= 0;
2749 /* -r: an obsolete synonym for -f (see above) */
2752 /* -S: Like -R but works on sender. */
2754 case 'S': /* Synonymous with -qS... */
2755 receiving_message
= FALSE
;
2757 /* -Sf: As -S (below) but force all deliveries,
2758 -Sff: Ditto, but also thaw all frozen messages,
2759 -Sr: String is regex
2760 -Srf: Regex and force
2761 -Srff: Regex and force and thaw
2763 in all cases provided there are no further characters in this
2769 for (i
= 0; i
< sizeof(rsopts
)/sizeof(uschar
*); i
++)
2771 if (Ustrcmp(argrest
, rsopts
[i
]) == 0)
2773 if (i
!= 2) queue_run_force
= TRUE
;
2774 if (i
>= 2) deliver_selectstring_sender_regex
= TRUE
;
2775 if (i
== 1 || i
== 4) deliver_force_thaw
= TRUE
;
2776 argrest
+= Ustrlen(rsopts
[i
]);
2781 /* -S: Set string to match in addresses for forced queue run to
2782 pick out particular messages. */
2786 if (i
+1 < argc
) deliver_selectstring_sender
= argv
[++i
]; else
2788 fprintf(stderr
, "exim: string expected after -S\n");
2792 else deliver_selectstring_sender
= argrest
;
2793 if (queue_interval
< 0) queue_interval
= 0;
2796 /* -Tqt is an option that is exclusively for use by the testing suite.
2797 It is not recognized in other circumstances. It allows for the setting up
2798 of explicit "queue times" so that various warning/retry things can be
2799 tested. Otherwise variability of clock ticks etc. cause problems. */
2802 if (running_in_test_harness
&& Ustrcmp(argrest
, "qt") == 0)
2803 fudged_queue_times
= argv
[++i
];
2808 /* -t: Set flag to extract recipients from body of message. */
2811 if (*argrest
== 0) extract_recipients
= TRUE
;
2813 /* -ti: Set flag to extract recipients from body of message, and also
2814 specify that dot does not end the message. */
2816 else if (Ustrcmp(argrest
, "i") == 0)
2818 extract_recipients
= TRUE
;
2822 /* -tls-on-connect: don't wait for STARTTLS (for old clients) */
2825 else if (Ustrcmp(argrest
, "ls-on-connect") == 0) tls_on_connect
= TRUE
;
2832 /* -U: This means "initial user submission" in sendmail, apparently. The
2833 doc claims that in future sendmail may refuse syntactically invalid
2834 messages instead of fixing them. For the moment, we just ignore it. */
2840 /* -v: verify things - this is a very low-level debugging */
2845 debug_selector
|= D_v
;
2846 debug_file
= stderr
;
2852 /* -x: AIX uses this to indicate some fancy 8-bit character stuff:
2854 The -x flag tells the sendmail command that mail from a local
2855 mail program has National Language Support (NLS) extended characters
2856 in the body of the mail item. The sendmail command can send mail with
2857 extended NLS characters across networks that normally corrupts these
2860 As Exim is 8-bit clean, it just ignores this flag. */
2863 if (*argrest
!= 0) badarg
= TRUE
;
2866 /* All other initial characters are errors */
2871 } /* End of high-level switch statement */
2873 /* Failed to recognize the option, or syntax error */
2877 fprintf(stderr
, "exim abandoned: unknown, malformed, or incomplete "
2878 "option %s\n", arg
);
2884 /* Arguments have been processed. Check for incompatibilities. */
2888 (smtp_input
|| extract_recipients
|| recipients_arg
< argc
) &&
2889 (daemon_listen
|| queue_interval
>= 0 || bi_option
||
2890 test_retry_arg
>= 0 || test_rewrite_arg
>= 0 ||
2891 filter_test
!= FTEST_NONE
|| (msg_action_arg
> 0 && !one_msg_action
))
2894 msg_action_arg
> 0 &&
2895 (daemon_listen
|| queue_interval
>= 0 || list_options
||
2896 (checking
&& msg_action
!= MSG_LOAD
) ||
2897 bi_option
|| test_retry_arg
>= 0 || test_rewrite_arg
>= 0)
2900 (daemon_listen
|| queue_interval
>= 0) &&
2901 (sender_address
!= NULL
|| list_options
|| list_queue
|| checking
||
2905 daemon_listen
&& queue_interval
== 0
2909 (checking
|| smtp_input
|| extract_recipients
||
2910 filter_test
!= FTEST_NONE
|| bi_option
)
2913 verify_address_mode
&&
2914 (address_test_mode
|| smtp_input
|| extract_recipients
||
2915 filter_test
!= FTEST_NONE
|| bi_option
)
2918 address_test_mode
&& (smtp_input
|| extract_recipients
||
2919 filter_test
!= FTEST_NONE
|| bi_option
)
2922 smtp_input
&& (sender_address
!= NULL
|| filter_test
!= FTEST_NONE
||
2926 deliver_selectstring
!= NULL
&& queue_interval
< 0
2930 fprintf(stderr
, "exim: incompatible command-line options or arguments\n");
2934 /* If debugging is set up, set the file and the file descriptor to pass on to
2935 child processes. It should, of course, be 2 for stderr. Also, force the daemon
2936 to run in the foreground. */
2938 if (debug_selector
!= 0)
2940 debug_file
= stderr
;
2941 debug_fd
= fileno(debug_file
);
2942 background_daemon
= FALSE
;
2943 if (running_in_test_harness
) millisleep(100); /* lets caller finish */
2944 if (debug_selector
!= D_v
) /* -v only doesn't show this */
2946 debug_printf("Exim version %s uid=%ld gid=%ld pid=%d D=%x\n",
2947 version_string
, (long int)real_uid
, (long int)real_gid
, (int)getpid(),
2949 show_whats_supported(stderr
);
2953 /* When started with root privilege, ensure that the limits on the number of
2954 open files and the number of processes (where that is accessible) are
2955 sufficiently large, or are unset, in case Exim has been called from an
2956 environment where the limits are screwed down. Not all OS have the ability to
2957 change some of these limits. */
2961 DEBUG(D_any
) debug_print_ids(US
"Exim has no root privilege:");
2967 #ifdef RLIMIT_NOFILE
2968 if (getrlimit(RLIMIT_NOFILE
, &rlp
) < 0)
2970 log_write(0, LOG_MAIN
|LOG_PANIC
, "getrlimit(RLIMIT_NOFILE) failed: %s",
2972 rlp
.rlim_cur
= rlp
.rlim_max
= 0;
2975 /* I originally chose 1000 as a nice big number that was unlikely to
2976 be exceeded. It turns out that some older OS have a fixed upper limit of
2979 if (rlp
.rlim_cur
< 1000)
2981 rlp
.rlim_cur
= rlp
.rlim_max
= 1000;
2982 if (setrlimit(RLIMIT_NOFILE
, &rlp
) < 0)
2984 rlp
.rlim_cur
= rlp
.rlim_max
= 256;
2985 if (setrlimit(RLIMIT_NOFILE
, &rlp
) < 0)
2986 log_write(0, LOG_MAIN
|LOG_PANIC
, "setrlimit(RLIMIT_NOFILE) failed: %s",
2993 if (getrlimit(RLIMIT_NPROC
, &rlp
) < 0)
2995 log_write(0, LOG_MAIN
|LOG_PANIC
, "getrlimit(RLIMIT_NPROC) failed: %s",
2997 rlp
.rlim_cur
= rlp
.rlim_max
= 0;
3000 #ifdef RLIM_INFINITY
3001 if (rlp
.rlim_cur
!= RLIM_INFINITY
&& rlp
.rlim_cur
< 1000)
3003 rlp
.rlim_cur
= rlp
.rlim_max
= RLIM_INFINITY
;
3005 if (rlp
.rlim_cur
< 1000)
3007 rlp
.rlim_cur
= rlp
.rlim_max
= 1000;
3009 if (setrlimit(RLIMIT_NPROC
, &rlp
) < 0)
3010 log_write(0, LOG_MAIN
|LOG_PANIC
, "setrlimit(RLIMIT_NPROC) failed: %s",
3016 /* Exim is normally entered as root (but some special configurations are
3017 possible that don't do this). However, it always spins off sub-processes that
3018 set their uid and gid as required for local delivery. We don't want to pass on
3019 any extra groups that root may belong to, so we want to get rid of them all at
3022 We need to obey setgroups() at this stage, before possibly giving up root
3023 privilege for a changed configuration file, but later on we might need to
3024 check on the additional groups for the admin user privilege - can't do that
3025 till after reading the config, which might specify the exim gid. Therefore,
3026 save the group list here first. */
3028 group_count
= getgroups(NGROUPS_MAX
, group_list
);
3030 /* There is a fundamental difference in some BSD systems in the matter of
3031 groups. FreeBSD and BSDI are known to be different; NetBSD and OpenBSD are
3032 known not to be different. On the "different" systems there is a single group
3033 list, and the first entry in it is the current group. On all other versions of
3034 Unix there is a supplementary group list, which is in *addition* to the current
3035 group. Consequently, to get rid of all extraneous groups on a "standard" system
3036 you pass over 0 groups to setgroups(), while on a "different" system you pass
3037 over a single group - the current group, which is always the first group in the
3038 list. Calling setgroups() with zero groups on a "different" system results in
3039 an error return. The following code should cope with both types of system.
3041 However, if this process isn't running as root, setgroups() can't be used
3042 since you have to be root to run it, even if throwing away groups. Not being
3043 root here happens only in some unusual configurations. We just ignore the
3046 if (setgroups(0, NULL
) != 0)
3048 if (setgroups(1, group_list
) != 0 && !unprivileged
)
3050 fprintf(stderr
, "exim: setgroups() failed: %s\n", strerror(errno
));
3055 /* If the configuration file name has been altered by an argument on the
3056 command line (either a new file name or a macro definition) and the caller is
3057 not root or the exim user, or if this is a filter testing run, remove any
3058 setuid privilege the program has, and run as the underlying user.
3060 If ALT_CONFIG_ROOT_ONLY is defined, the exim user is locked out of this, which
3061 severely restricts the use of -C for some purposes.
3063 Otherwise, set the real ids to the effective values (should be root unless run
3064 from inetd, which it can either be root or the exim uid, if one is configured).
3066 There is a private mechanism for bypassing some of this, in order to make it
3067 possible to test lots of configurations automatically, without having either to
3068 recompile each time, or to patch in an actual configuration file name and other
3069 values (such as the path name). If running in the test harness, pretend that
3070 configuration file changes and macro definitions haven't happened. */
3073 (config_changed
|| macros
!= NULL
) && /* Config changed, and */
3074 real_uid
!= root_uid
&& /* Not root, and */
3075 #ifndef ALT_CONFIG_ROOT_ONLY /* (when not locked out) */
3076 real_uid
!= exim_uid
&& /* Not exim, and */
3078 !running_in_test_harness
/* Not fudged */
3080 expansion_test
/* expansion testing */
3082 filter_test
!= FTEST_NONE
) /* Filter testing */
3084 setgroups(group_count
, group_list
);
3085 exim_setugid(real_uid
, real_gid
, FALSE
,
3086 US
"-C, -D, -be or -bf forces real uid");
3087 removed_privilege
= TRUE
;
3089 /* In the normal case when Exim is called like this, stderr is available
3090 and should be used for any logging information because attempts to write
3091 to the log will usually fail. To arrange this, we unset really_exim. However,
3092 if no stderr is available there is no point - we might as well have a go
3093 at the log (if it fails, syslog will be written). */
3095 if (log_stderr
!= NULL
) really_exim
= FALSE
;
3098 /* Privilege is to be retained for the moment. It may be dropped later,
3099 depending on the job that this Exim process has been asked to do. For now, set
3100 the real uid to the effective so that subsequent re-execs of Exim are done by a
3103 else exim_setugid(geteuid(), getegid(), FALSE
, US
"forcing real = effective");
3105 /* If testing a filter, open the file(s) now, before wasting time doing other
3106 setups and reading the message. */
3108 if ((filter_test
& FTEST_SYSTEM
) != 0)
3110 filter_sfd
= Uopen(filter_test_sfile
, O_RDONLY
, 0);
3113 fprintf(stderr
, "exim: failed to open %s: %s\n", filter_test_sfile
,
3115 return EXIT_FAILURE
;
3119 if ((filter_test
& FTEST_USER
) != 0)
3121 filter_ufd
= Uopen(filter_test_ufile
, O_RDONLY
, 0);
3124 fprintf(stderr
, "exim: failed to open %s: %s\n", filter_test_ufile
,
3126 return EXIT_FAILURE
;
3130 /* Read the main runtime configuration data; this gives up if there
3131 is a failure. It leaves the configuration file open so that the subsequent
3132 configuration data for delivery can be read if needed. */
3136 /* Handle the decoding of logging options. */
3138 decode_bits(&log_write_selector
, &log_extra_selector
, 0, 0, log_selector_string
,
3139 log_options
, log_options_count
, US
"log");
3143 debug_printf("configuration file is %s\n", config_main_filename
);
3144 debug_printf("log selectors = %08x %08x\n", log_write_selector
,
3145 log_extra_selector
);
3148 /* If domain literals are not allowed, check the sender address that was
3149 supplied with -f. Ditto for a stripped trailing dot. */
3151 if (sender_address
!= NULL
)
3153 if (sender_address
[sender_address_domain
] == '[' && !allow_domain_literals
)
3155 fprintf(stderr
, "exim: bad -f address \"%s\": domain literals not "
3156 "allowed\n", sender_address
);
3157 return EXIT_FAILURE
;
3159 if (f_end_dot
&& !strip_trailing_dot
)
3161 fprintf(stderr
, "exim: bad -f address \"%s.\": domain is malformed "
3162 "(trailing dot not allowed)\n", sender_address
);
3163 return EXIT_FAILURE
;
3167 /* Paranoia check of maximum lengths of certain strings. There is a check
3168 on the length of the log file path in log.c, which will come into effect
3169 if there are any calls to write the log earlier than this. However, if we
3170 get this far but the string is very long, it is better to stop now than to
3171 carry on and (e.g.) receive a message and then have to collapse. The call to
3172 log_write() from here will cause the ultimate panic collapse if the complete
3173 file name exceeds the buffer length. */
3175 if (Ustrlen(log_file_path
) > 200)
3176 log_write(0, LOG_MAIN
|LOG_PANIC_DIE
,
3177 "log_file_path is longer than 200 chars: aborting");
3179 if (Ustrlen(pid_file_path
) > 200)
3180 log_write(0, LOG_MAIN
|LOG_PANIC_DIE
,
3181 "pid_file_path is longer than 200 chars: aborting");
3183 if (Ustrlen(spool_directory
) > 200)
3184 log_write(0, LOG_MAIN
|LOG_PANIC_DIE
,
3185 "spool_directory is longer than 200 chars: aborting");
3187 /* Length check on the process name given to syslog for its TAG field,
3188 which is only permitted to be 32 characters or less. See RFC 3164. */
3190 if (Ustrlen(syslog_processname
) > 32)
3191 log_write(0, LOG_MAIN
|LOG_PANIC_DIE
,
3192 "syslog_processname is longer than 32 chars: aborting");
3194 /* In some operating systems, the environment variable TMPDIR controls where
3195 temporary files are created; Exim doesn't use these (apart from when delivering
3196 to MBX mailboxes), but called libraries such as DBM libraries may require them.
3197 If TMPDIR is found in the environment, reset it to the value defined in the
3198 TMPDIR macro, if this macro is defined. */
3203 for (p
= USS environ
; *p
!= NULL
; p
++)
3205 if (Ustrncmp(*p
, "TMPDIR=", 7) == 0 &&
3206 Ustrcmp(*p
+7, TMPDIR
) != 0)
3208 uschar
*newp
= malloc(Ustrlen(TMPDIR
) + 8);
3209 sprintf(CS newp
, "TMPDIR=%s", TMPDIR
);
3211 DEBUG(D_any
) debug_printf("reset TMPDIR=%s in environment\n", TMPDIR
);
3217 /* Timezone handling. If timezone_string is "utc", set a flag to cause all
3218 timestamps to be in UTC (gmtime() is used instead of localtime()). Otherwise,
3219 we may need to get rid of a bogus timezone setting. This can arise when Exim is
3220 called by a user who has set the TZ variable. This then affects the timestamps
3221 in log files and in Received: headers, and any created Date: header lines. The
3222 required timezone is settable in the configuration file, so nothing can be done
3223 about this earlier - but hopefully nothing will normally be logged earlier than
3224 this. We have to make a new environment if TZ is wrong, but don't bother if
3225 timestamps_utc is set, because then all times are in UTC anyway. */
3227 if (timezone_string
!= NULL
&& strcmpic(timezone_string
, US
"UTC") == 0)
3229 timestamps_utc
= TRUE
;
3233 uschar
*envtz
= US
getenv("TZ");
3234 if ((envtz
== NULL
&& timezone_string
!= NULL
) ||
3236 (timezone_string
== NULL
||
3237 Ustrcmp(timezone_string
, envtz
) != 0)))
3239 uschar
**p
= USS environ
;
3243 while (*p
++ != NULL
) count
++;
3244 if (envtz
== NULL
) count
++;
3245 newp
= new = malloc(sizeof(uschar
*) * (count
+ 1));
3246 for (p
= USS environ
; *p
!= NULL
; p
++)
3248 if (Ustrncmp(*p
, "TZ=", 3) == 0) continue;
3251 if (timezone_string
!= NULL
)
3253 *newp
= malloc(Ustrlen(timezone_string
) + 4);
3254 sprintf(CS
*newp
++, "TZ=%s", timezone_string
);
3259 DEBUG(D_any
) debug_printf("Reset TZ to %s: time is %s\n", timezone_string
,
3260 tod_stamp(tod_log
));
3264 /* Handle the case when we have removed the setuid privilege because of -C or
3265 -D. This means that the caller of Exim was not root, and, provided that
3266 ALT_CONFIG_ROOT_ONLY is not defined, was not the Exim user that is built into
3269 If ALT_CONFIG_ROOT_ONLY is not defined, there is a problem if it turns out we
3270 were running as the exim user defined in the configuration file (different to
3271 the one in the binary). The sysadmin may expect this case to retain privilege
3272 because "the binary was called by the Exim user", but it hasn't, because of the
3273 order in which it handles this stuff. There are two possibilities:
3275 (1) If deliver_drop_privilege is set, Exim is not going to re-exec in order
3276 to do message deliveries. Thus, the fact that it is running as a
3277 non-privileged user is plausible, and might be wanted in some special
3278 configurations. However, really_exim will have been set false when
3279 privilege was dropped, to stop Exim trying to write to its normal log
3280 files. Therefore, re-enable normal log processing, assuming the sysadmin
3281 has set up the log directory correctly.
3283 (2) If deliver_drop_privilege is not set, the configuration won't work as
3284 apparently intended, and so we log a panic message. In order to retain
3285 root for -C or -D, the caller must either be root or the Exim user
3286 defined in the binary (when deliver_drop_ privilege is false).
3288 If ALT_CONFIG_ROOT_ONLY is defined, we don't know whether we were called by the
3289 built-in exim user or one defined in the configuration. In either event,
3290 re-enable log processing, assuming the sysadmin knows what they are doing. */
3292 if (removed_privilege
&& (config_changed
|| macros
!= NULL
) &&
3293 real_uid
== exim_uid
)
3295 #ifdef ALT_CONFIG_ROOT_ONLY
3296 really_exim
= TRUE
; /* let logging work normally */
3299 if (deliver_drop_privilege
)
3300 really_exim
= TRUE
; /* let logging work normally */
3302 log_write(0, LOG_MAIN
|LOG_PANIC
,
3303 "exim user (uid=%d) is defined only at runtime; privilege lost for %s",
3304 (int)exim_uid
, config_changed
? "-C" : "-D");
3308 /* Start up Perl interpreter if Perl support is configured and there is a
3309 perl_startup option, and the configuration or the command line specifies
3310 initializing starting. Note that the global variables are actually called
3311 opt_perl_xxx to avoid clashing with perl's namespace (perl_*). */
3314 if (perl_start_option
!= 0)
3315 opt_perl_at_start
= (perl_start_option
> 0);
3316 if (opt_perl_at_start
&& opt_perl_startup
!= NULL
)
3319 DEBUG(D_any
) debug_printf("Starting Perl interpreter\n");
3320 errstr
= init_perl(opt_perl_startup
);
3323 fprintf(stderr
, "exim: error in perl_startup code: %s\n", errstr
);
3324 return EXIT_FAILURE
;
3326 opt_perl_started
= TRUE
;
3328 #endif /* EXIM_PERL */
3330 /* Log the arguments of the call if the configuration file said so. This is
3331 a debugging feature for finding out what arguments certain MUAs actually use.
3332 Don't attempt it if logging is disabled, or if listing variables or if
3333 verifying/testing addresses or expansions. */
3335 if (((debug_selector
& D_any
) != 0 || (log_extra_selector
& LX_arguments
) != 0)
3336 && really_exim
&& !list_options
&& !checking
)
3339 uschar
*p
= big_buffer
;
3341 (void)getcwd(CS p
+4, big_buffer_size
- 4);
3343 (void)string_format(p
, big_buffer_size
- (p
- big_buffer
), " %d args:", argc
);
3345 for (i
= 0; i
< argc
; i
++)
3347 int len
= Ustrlen(argv
[i
]);
3350 if (p
+ len
+ 8 >= big_buffer
+ big_buffer_size
)
3353 log_write(0, LOG_MAIN
, "%s", big_buffer
);
3354 Ustrcpy(big_buffer
, "...");
3357 printing
= string_printing(argv
[i
]);
3358 if (printing
[0] == 0) quote
= US
"\""; else
3360 uschar
*pp
= printing
;
3362 while (*pp
!= 0) if (isspace(*pp
++)) { quote
= US
"\""; break; }
3364 sprintf(CS p
, " %s%.*s%s", quote
, (int)(big_buffer_size
-
3365 (p
- big_buffer
) - 4), printing
, quote
);
3369 if ((log_extra_selector
& LX_arguments
) != 0)
3370 log_write(0, LOG_MAIN
, "%s", big_buffer
);
3372 debug_printf("%s\n", big_buffer
);
3375 /* Set the working directory to be the top-level spool directory. We don't rely
3376 on this in the code, which always uses fully qualified names, but it's useful
3377 for core dumps etc. Don't complain if it fails - the spool directory might not
3378 be generally accessible and calls with the -C option (and others) have lost
3379 privilege by now. Before the chdir, we try to ensure that the directory exists.
3382 if (Uchdir(spool_directory
) != 0)
3384 (void)directory_make(spool_directory
, US
"", SPOOL_DIRECTORY_MODE
, FALSE
);
3385 (void)Uchdir(spool_directory
);
3388 /* Handle calls with the -bi option. This is a sendmail option to rebuild *the*
3389 alias file. Exim doesn't have such a concept, but this call is screwed into
3390 Sun's YP makefiles. Handle this by calling a configured script, as the real
3391 user who called Exim. The -oA option can be used to pass an argument to the
3396 (void)fclose(config_file
);
3397 if (bi_command
!= NULL
)
3401 argv
[i
++] = bi_command
;
3402 if (alias_arg
!= NULL
) argv
[i
++] = alias_arg
;
3405 setgroups(group_count
, group_list
);
3406 exim_setugid(real_uid
, real_gid
, FALSE
, US
"running bi_command");
3408 DEBUG(D_exec
) debug_printf("exec %.256s %.256s\n", argv
[0],
3409 (argv
[1] == NULL
)? US
"" : argv
[1]);
3411 execv(CS argv
[0], (char *const *)argv
);
3412 fprintf(stderr
, "exim: exec failed: %s\n", strerror(errno
));
3417 DEBUG(D_any
) debug_printf("-bi used but bi_command not set; exiting\n");
3422 /* If an action on specific messages is requested, or if a daemon or queue
3423 runner is being started, we need to know if Exim was called by an admin user.
3424 This is the case if the real user is root or exim, or if the real group is
3425 exim, or if one of the supplementary groups is exim or a group listed in
3426 admin_groups. We don't fail all message actions immediately if not admin_user,
3427 since some actions can be performed by non-admin users. Instead, set admin_user
3428 for later interrogation. */
3430 if (real_uid
== root_uid
|| real_uid
== exim_uid
|| real_gid
== exim_gid
)
3436 for (i
= 0; i
< group_count
; i
++)
3438 if (group_list
[i
] == exim_gid
) admin_user
= TRUE
;
3439 else if (admin_groups
!= NULL
)
3441 for (j
= 1; j
<= (int)(admin_groups
[0]); j
++)
3442 if (admin_groups
[j
] == group_list
[i
])
3443 { admin_user
= TRUE
; break; }
3445 if (admin_user
) break;
3449 /* Another group of privileged users are the trusted users. These are root,
3450 exim, and any caller matching trusted_users or trusted_groups. Trusted callers
3451 are permitted to specify sender_addresses with -f on the command line, and
3452 other message parameters as well. */
3454 if (real_uid
== root_uid
|| real_uid
== exim_uid
)
3455 trusted_caller
= TRUE
;
3460 if (trusted_users
!= NULL
)
3462 for (i
= 1; i
<= (int)(trusted_users
[0]); i
++)
3463 if (trusted_users
[i
] == real_uid
)
3464 { trusted_caller
= TRUE
; break; }
3467 if (!trusted_caller
&& trusted_groups
!= NULL
)
3469 for (i
= 1; i
<= (int)(trusted_groups
[0]); i
++)
3471 if (trusted_groups
[i
] == real_gid
)
3472 trusted_caller
= TRUE
;
3473 else for (j
= 0; j
< group_count
; j
++)
3475 if (trusted_groups
[i
] == group_list
[j
])
3476 { trusted_caller
= TRUE
; break; }
3478 if (trusted_caller
) break;
3483 if (trusted_caller
) DEBUG(D_any
) debug_printf("trusted user\n");
3484 if (admin_user
) DEBUG(D_any
) debug_printf("admin user\n");
3486 /* Only an admin user may start the daemon or force a queue run in the default
3487 configuration, but the queue run restriction can be relaxed. Only an admin
3488 user may request that a message be returned to its sender forthwith. Only an
3489 admin user may specify a debug level greater than D_v (because it might show
3490 passwords, etc. in lookup queries). Only an admin user may request a queue
3495 BOOL debugset
= (debug_selector
& ~D_v
) != 0;
3496 if (deliver_give_up
|| daemon_listen
||
3497 (count_queue
&& queue_list_requires_admin
) ||
3498 (list_queue
&& queue_list_requires_admin
) ||
3499 (queue_interval
>= 0 && prod_requires_admin
) ||
3500 (debugset
&& !running_in_test_harness
))
3502 fprintf(stderr
, "exim:%s permission denied\n", debugset
? " debugging" : "");
3507 /* If the real user is not root or the exim uid, the argument for passing
3508 in an open TCP/IP connection for another message is not permitted, nor is
3509 running with the -N option for any delivery action, unless this call to exim is
3510 one that supplied an input message, or we are using a patched exim for
3511 regression testing. */
3513 if (real_uid
!= root_uid
&& real_uid
!= exim_uid
&&
3514 (continue_hostname
!= NULL
||
3516 (queue_interval
>= 0 || daemon_listen
|| msg_action_arg
> 0)
3517 )) && !running_in_test_harness
)
3519 fprintf(stderr
, "exim: Permission denied\n");
3520 return EXIT_FAILURE
;
3523 /* If the caller is not trusted, certain arguments are ignored when running for
3524 real, but are permitted when checking things (-be, -bv, -bt, -bh, -bf, -bF).
3525 Note that authority for performing certain actions on messages is tested in the
3526 queue_action() function. */
3528 if (!trusted_caller
&& !checking
&& filter_test
== FTEST_NONE
)
3530 sender_host_name
= sender_host_address
= interface_address
=
3531 sender_ident
= received_protocol
= NULL
;
3532 sender_host_port
= interface_port
= 0;
3533 sender_host_authenticated
= authenticated_sender
= authenticated_id
= NULL
;
3536 /* If a sender host address is set, extract the optional port number off the
3537 end of it and check its syntax. Do the same thing for the interface address.
3538 Exim exits if the syntax is bad. */
3542 if (sender_host_address
!= NULL
)
3543 sender_host_port
= check_port(sender_host_address
);
3544 if (interface_address
!= NULL
)
3545 interface_port
= check_port(interface_address
);
3548 /* If an SMTP message is being received check to see if the standard input is a
3549 TCP/IP socket. If it is, we assume that Exim was called from inetd if the
3550 caller is root or the Exim user, or if the port is a privileged one. Otherwise,
3555 union sockaddr_46 inetd_sock
;
3556 EXIM_SOCKLEN_T size
= sizeof(inetd_sock
);
3557 if (getpeername(0, (struct sockaddr
*)(&inetd_sock
), &size
) == 0)
3559 int family
= ((struct sockaddr
*)(&inetd_sock
))->sa_family
;
3560 if (family
== AF_INET
|| family
== AF_INET6
)
3562 union sockaddr_46 interface_sock
;
3563 size
= sizeof(interface_sock
);
3565 if (getsockname(0, (struct sockaddr
*)(&interface_sock
), &size
) == 0)
3566 interface_address
= host_ntoa(-1, &interface_sock
, NULL
,
3569 if (host_is_tls_on_connect_port(interface_port
)) tls_on_connect
= TRUE
;
3571 if (real_uid
== root_uid
|| real_uid
== exim_uid
|| interface_port
< 1024)
3574 sender_host_address
= host_ntoa(-1, (struct sockaddr
*)(&inetd_sock
),
3575 NULL
, &sender_host_port
);
3576 if (mua_wrapper
) log_write(0, LOG_MAIN
|LOG_PANIC_DIE
, "Input from "
3577 "inetd is not supported when mua_wrapper is set");
3582 "exim: Permission denied (unprivileged user, unprivileged port)\n");
3583 return EXIT_FAILURE
;
3589 /* If the load average is going to be needed while receiving a message, get it
3590 now for those OS that require the first call to os_getloadavg() to be done as
3591 root. There will be further calls later for each message received. */
3593 #ifdef LOAD_AVG_NEEDS_ROOT
3594 if (receiving_message
&&
3595 (queue_only_load
>= 0 ||
3596 (is_inetd
&& smtp_load_reserve
>= 0)
3599 load_average
= os_getloadavg();
3603 /* The queue_only configuration option can be overridden by -odx on the command
3604 line, except that if queue_only_override is false, queue_only cannot be unset
3605 from the command line. */
3607 if (queue_only_set
&& (queue_only_override
|| arg_queue_only
))
3608 queue_only
= arg_queue_only
;
3610 /* The receive_timeout and smtp_receive_timeout options can be overridden by
3613 if (arg_receive_timeout
>= 0) receive_timeout
= arg_receive_timeout
;
3614 if (arg_smtp_receive_timeout
>= 0)
3615 smtp_receive_timeout
= arg_smtp_receive_timeout
;
3617 /* If Exim was started with root privilege, unless we have already removed the
3618 root privilege above as a result of -C, -D, -be, -bf or -bF, remove it now
3619 except when starting the daemon or doing some kind of delivery or address
3620 testing (-bt). These are the only cases when root need to be retained. We run
3621 as exim for -bv and -bh. However, if deliver_drop_privilege is set, root is
3622 retained only for starting the daemon. We always do the initgroups() in this
3623 situation (controlled by the TRUE below), in order to be as close as possible
3624 to the state Exim usually runs in. */
3626 if (!unprivileged
&& /* originally had root AND */
3627 !removed_privilege
&& /* still got root AND */
3628 !daemon_listen
&& /* not starting the daemon */
3629 queue_interval
<= 0 && /* (either kind of daemon) */
3631 deliver_drop_privilege
|| /* requested unprivileged */
3633 queue_interval
< 0 && /* not running the queue */
3634 (msg_action_arg
< 0 || /* and */
3635 msg_action
!= MSG_DELIVER
) && /* not delivering and */
3636 (!checking
|| !address_test_mode
) /* not address checking */
3640 exim_setugid(exim_uid
, exim_gid
, TRUE
, US
"privilege not needed");
3643 /* When we are retaining a privileged uid, we still change to the exim gid. */
3645 else setgid(exim_gid
);
3647 /* Handle a request to list the delivery queue */
3651 set_process_info("listing the queue");
3652 queue_list(list_queue_option
, argv
+ recipients_arg
, argc
- recipients_arg
);
3656 /* Handle a request to count the delivery queue */
3660 set_process_info("counting the queue");
3665 /* Handle actions on specific messages, except for the force delivery and
3666 message load actions, which are done below. Some actions take a whole list of
3667 message ids, which are known to continue up to the end of the arguments. Others
3668 take a single message id and then operate on the recipients list. */
3670 if (msg_action_arg
> 0 && msg_action
!= MSG_DELIVER
&& msg_action
!= MSG_LOAD
)
3672 int yield
= EXIT_SUCCESS
;
3673 set_process_info("acting on specified messages");
3675 if (!one_msg_action
)
3677 for (i
= msg_action_arg
; i
< argc
; i
++)
3678 if (!queue_action(argv
[i
], msg_action
, NULL
, 0, 0))
3679 yield
= EXIT_FAILURE
;
3682 else if (!queue_action(argv
[msg_action_arg
], msg_action
, argv
, argc
,
3683 recipients_arg
)) yield
= EXIT_FAILURE
;
3687 /* All the modes below here require the remaining configuration sections
3688 to be read, except that we can skip over the ACL setting when delivering
3689 specific messages, or doing a queue run. (For various testing cases we could
3690 skip too, but as they are rare, it doesn't really matter.) The argument is TRUE
3693 readconf_rest(msg_action_arg
> 0 || (queue_interval
== 0 && !daemon_listen
));
3695 /* The configuration data will have been read into POOL_PERM because we won't
3696 ever want to reset back past it. Change the current pool to POOL_MAIN. In fact,
3697 this is just a bit of pedantic tidiness. It wouldn't really matter if the
3698 configuration were read into POOL_MAIN, because we don't do any resets till
3699 later on. However, it seems right, and it does ensure that both pools get used.
3702 store_pool
= POOL_MAIN
;
3704 /* Handle the -brt option. This is for checking out retry configurations.
3705 The next three arguments are a domain name or a complete address, and
3706 optionally two error numbers. All it does is to call the function that
3707 scans the retry configuration data. */
3709 if (test_retry_arg
>= 0)
3711 retry_config
*yield
;
3712 int basic_errno
= 0;
3716 if (test_retry_arg
>= argc
)
3718 printf("-brt needs a domain or address argument\n");
3719 exim_exit(EXIT_FAILURE
);
3721 s1
= argv
[test_retry_arg
++];
3724 /* If the first argument contains no @ and no . it might be a local user
3725 or it might be a single-component name. Treat as a domain. */
3727 if (Ustrchr(s1
, '@') == NULL
&& Ustrchr(s1
, '.') == NULL
)
3729 printf("Warning: \"%s\" contains no '@' and no '.' characters. It is "
3730 "being \ntreated as a one-component domain, not as a local part.\n\n",
3734 /* There may be an optional second domain arg. */
3736 if (test_retry_arg
< argc
&& Ustrchr(argv
[test_retry_arg
], '.') != NULL
)
3737 s2
= argv
[test_retry_arg
++];
3739 /* The final arg is an error name */
3741 if (test_retry_arg
< argc
)
3743 uschar
*ss
= argv
[test_retry_arg
];
3745 readconf_retry_error(ss
, ss
+ Ustrlen(ss
), &basic_errno
, &more_errno
);
3748 printf("%s\n", CS error
);
3749 return EXIT_FAILURE
;
3752 /* For the {MAIL,RCPT,DATA}_4xx errors, a value of 255 means "any", and a
3753 code > 100 as an error is for matching codes to the decade. Turn them into
3754 a real error code, off the decade. */
3756 if (basic_errno
== ERRNO_MAIL4XX
||
3757 basic_errno
== ERRNO_RCPT4XX
||
3758 basic_errno
== ERRNO_DATA4XX
)
3760 int code
= (more_errno
>> 8) & 255;
3762 more_errno
= (more_errno
& 0xffff00ff) | (21 << 8);
3763 else if (code
> 100)
3764 more_errno
= (more_errno
& 0xffff00ff) | ((code
- 96) << 8);
3768 yield
= retry_find_config(s1
, s2
, basic_errno
, more_errno
);
3769 if (yield
== NULL
) printf("No retry information found\n"); else
3772 more_errno
= yield
->more_errno
;
3773 printf("Retry rule: %s ", yield
->pattern
);
3775 if (yield
->basic_errno
== ERRNO_EXIMQUOTA
)
3777 printf("quota%s%s ",
3778 (more_errno
> 0)? "_" : "",
3779 (more_errno
> 0)? readconf_printtime(more_errno
) : US
"");
3781 else if (yield
->basic_errno
== ECONNREFUSED
)
3783 printf("refused%s%s ",
3784 (more_errno
> 0)? "_" : "",
3785 (more_errno
== 'M')? "MX" :
3786 (more_errno
== 'A')? "A" : "");
3788 else if (yield
->basic_errno
== ETIMEDOUT
)
3791 if ((more_errno
& RTEF_CTOUT
) != 0) printf("_connect");
3793 if (more_errno
!= 0) printf("_%s",
3794 (more_errno
== 'M')? "MX" : "A");
3797 else if (yield
->basic_errno
== ERRNO_AUTHFAIL
)
3798 printf("auth_failed ");
3801 for (r
= yield
->rules
; r
!= NULL
; r
= r
->next
)
3803 printf("%c,%s", r
->rule
, readconf_printtime(r
->timeout
)); /* Do not */
3804 printf(",%s", readconf_printtime(r
->p1
)); /* amalgamate */
3810 printf(",%d.", x
/1000);
3824 exim_exit(EXIT_SUCCESS
);
3827 /* Handle a request to list one or more configuration options */
3831 set_process_info("listing variables");
3832 if (recipients_arg
>= argc
) readconf_print(US
"all", NULL
);
3833 else for (i
= recipients_arg
; i
< argc
; i
++)
3836 (Ustrcmp(argv
[i
], "router") == 0 ||
3837 Ustrcmp(argv
[i
], "transport") == 0 ||
3838 Ustrcmp(argv
[i
], "authenticator") == 0))
3840 readconf_print(argv
[i
+1], argv
[i
]);
3843 else readconf_print(argv
[i
], NULL
);
3845 exim_exit(EXIT_SUCCESS
);
3849 /* Handle a request to deliver one or more messages that are already on the
3850 queue. Values of msg_action other than MSG_DELIVER and MSG_LOAD are dealt with
3851 above. MSG_LOAD is handled with -be (which is the only time it applies) below.
3853 Delivery of specific messages is typically used for a small number when
3854 prodding by hand (when the option forced_delivery will be set) or when
3855 re-execing to regain root privilege. Each message delivery must happen in a
3856 separate process, so we fork a process for each one, and run them sequentially
3857 so that debugging output doesn't get intertwined, and to avoid spawning too
3858 many processes if a long list is given. However, don't fork for the last one;
3859 this saves a process in the common case when Exim is called to deliver just one
3862 if (msg_action_arg
> 0 && msg_action
!= MSG_LOAD
)
3864 if (prod_requires_admin
&& !admin_user
)
3866 fprintf(stderr
, "exim: Permission denied\n");
3867 exim_exit(EXIT_FAILURE
);
3869 set_process_info("delivering specified messages");
3870 if (deliver_give_up
) forced_delivery
= deliver_force_thaw
= TRUE
;
3871 for (i
= msg_action_arg
; i
< argc
; i
++)
3876 (void)deliver_message(argv
[i
], forced_delivery
, deliver_give_up
);
3877 else if ((pid
= fork()) == 0)
3879 (void)deliver_message(argv
[i
], forced_delivery
, deliver_give_up
);
3880 _exit(EXIT_SUCCESS
);
3884 fprintf(stderr
, "failed to fork delivery process for %s: %s\n", argv
[i
],
3886 exim_exit(EXIT_FAILURE
);
3890 exim_exit(EXIT_SUCCESS
);
3894 /* If only a single queue run is requested, without SMTP listening, we can just
3895 turn into a queue runner, with an optional starting message id. */
3897 if (queue_interval
== 0 && !daemon_listen
)
3899 DEBUG(D_queue_run
) debug_printf("Single queue run%s%s%s%s\n",
3900 (start_queue_run_id
== NULL
)? US
"" : US
" starting at ",
3901 (start_queue_run_id
== NULL
)? US
"" : start_queue_run_id
,
3902 (stop_queue_run_id
== NULL
)? US
"" : US
" stopping at ",
3903 (stop_queue_run_id
== NULL
)? US
"" : stop_queue_run_id
);
3904 set_process_info("running the queue (single queue run)");
3905 queue_run(start_queue_run_id
, stop_queue_run_id
, FALSE
);
3906 exim_exit(EXIT_SUCCESS
);
3910 /* Find the login name of the real user running this process. This is always
3911 needed when receiving a message, because it is written into the spool file. It
3912 may also be used to construct a from: or a sender: header, and in this case we
3913 need the user's full name as well, so save a copy of it, checked for RFC822
3914 syntax and munged if necessary, if it hasn't previously been set by the -F
3915 argument. We may try to get the passwd entry more than once, in case NIS or
3916 other delays are in evidence. Save the home directory for use in filter testing
3921 if ((pw
= getpwuid(real_uid
)) != NULL
)
3923 originator_login
= string_copy(US pw
->pw_name
);
3924 originator_home
= string_copy(US pw
->pw_dir
);
3926 /* If user name has not been set by -F, set it from the passwd entry
3927 unless -f has been used to set the sender address by a trusted user. */
3929 if (originator_name
== NULL
)
3931 if (sender_address
== NULL
||
3932 (!trusted_caller
&& filter_test
== FTEST_NONE
))
3934 uschar
*name
= US pw
->pw_gecos
;
3935 uschar
*amp
= Ustrchr(name
, '&');
3938 /* Most Unix specify that a '&' character in the gecos field is
3939 replaced by a copy of the login name, and some even specify that
3940 the first character should be upper cased, so that's what we do. */
3945 string_format(buffer
, sizeof(buffer
), "%.*s%n%s%s",
3946 amp
- name
, name
, &loffset
, originator_login
, amp
+ 1);
3947 buffer
[loffset
] = toupper(buffer
[loffset
]);
3951 /* If a pattern for matching the gecos field was supplied, apply
3952 it and then expand the name string. */
3954 if (gecos_pattern
!= NULL
&& gecos_name
!= NULL
)
3957 re
= regex_must_compile(gecos_pattern
, FALSE
, TRUE
); /* Use malloc */
3959 if (regex_match_and_setup(re
, name
, 0, -1))
3961 uschar
*new_name
= expand_string(gecos_name
);
3963 if (new_name
!= NULL
)
3965 DEBUG(D_receive
) debug_printf("user name \"%s\" extracted from "
3966 "gecos field \"%s\"\n", new_name
, name
);
3969 else DEBUG(D_receive
) debug_printf("failed to expand gecos_name string "
3970 "\"%s\": %s\n", gecos_name
, expand_string_message
);
3972 else DEBUG(D_receive
) debug_printf("gecos_pattern \"%s\" did not match "
3973 "gecos field \"%s\"\n", gecos_pattern
, name
);
3974 store_free((void *)re
);
3976 originator_name
= string_copy(name
);
3979 /* A trusted caller has used -f but not -F */
3981 else originator_name
= US
"";
3984 /* Break the retry loop */
3989 if (++i
> finduser_retries
) break;
3993 /* If we cannot get a user login, log the incident and give up, unless the
3994 configuration specifies something to use. When running in the test harness,
3995 any setting of unknown_login overrides the actual name. */
3997 if (originator_login
== NULL
|| running_in_test_harness
)
3999 if (unknown_login
!= NULL
)
4001 originator_login
= expand_string(unknown_login
);
4002 if (originator_name
== NULL
&& unknown_username
!= NULL
)
4003 originator_name
= expand_string(unknown_username
);
4004 if (originator_name
== NULL
) originator_name
= US
"";
4006 if (originator_login
== NULL
)
4007 log_write(0, LOG_MAIN
|LOG_PANIC_DIE
, "Failed to get user name for uid %d",
4011 /* Ensure that the user name is in a suitable form for use as a "phrase" in an
4014 originator_name
= string_copy(parse_fix_phrase(originator_name
,
4015 Ustrlen(originator_name
), big_buffer
, big_buffer_size
));
4017 /* If a message is created by this call of Exim, the uid/gid of its originator
4018 are those of the caller. These values are overridden if an existing message is
4019 read in from the spool. */
4021 originator_uid
= real_uid
;
4022 originator_gid
= real_gid
;
4024 DEBUG(D_receive
) debug_printf("originator: uid=%d gid=%d login=%s name=%s\n",
4025 (int)originator_uid
, (int)originator_gid
, originator_login
, originator_name
);
4027 /* Run in daemon and/or queue-running mode. The function daemon_go() never
4028 returns. We leave this till here so that the originator_ fields are available
4029 for incoming messages via the daemon. The daemon cannot be run in mua_wrapper
4032 if (daemon_listen
|| queue_interval
> 0)
4036 fprintf(stderr
, "Daemon cannot be run when mua_wrapper is set\n");
4037 log_write(0, LOG_MAIN
|LOG_PANIC_DIE
, "Daemon cannot be run when "
4038 "mua_wrapper is set");
4043 /* If the sender ident has not been set (by a trusted caller) set it to
4044 the caller. This will get overwritten below for an inetd call. If a trusted
4045 caller has set it empty, unset it. */
4047 if (sender_ident
== NULL
) sender_ident
= originator_login
;
4048 else if (sender_ident
[0] == 0) sender_ident
= NULL
;
4050 /* Handle the -brw option, which is for checking out rewriting rules. Cause log
4051 writes (on errors) to go to stderr instead. Can't do this earlier, as want the
4052 originator_* variables set. */
4054 if (test_rewrite_arg
>= 0)
4056 really_exim
= FALSE
;
4057 if (test_rewrite_arg
>= argc
)
4059 printf("-brw needs an address argument\n");
4060 exim_exit(EXIT_FAILURE
);
4062 rewrite_test(argv
[test_rewrite_arg
]);
4063 exim_exit(EXIT_SUCCESS
);
4066 /* A locally-supplied message is considered to be coming from a local user
4067 unless a trusted caller supplies a sender address with -f, or is passing in the
4068 message via SMTP (inetd invocation or otherwise). */
4070 if ((sender_address
== NULL
&& !smtp_input
) ||
4071 (!trusted_caller
&& filter_test
== FTEST_NONE
))
4073 sender_local
= TRUE
;
4075 /* A trusted caller can supply authenticated_sender and authenticated_id
4076 via -oMas and -oMai and if so, they will already be set. Otherwise, force
4077 defaults except when host checking. */
4079 if (authenticated_sender
== NULL
&& !host_checking
)
4080 authenticated_sender
= string_sprintf("%s@%s", originator_login
,
4081 qualify_domain_sender
);
4082 if (authenticated_id
== NULL
&& !host_checking
)
4083 authenticated_id
= originator_login
;
4086 /* Trusted callers are always permitted to specify the sender address.
4087 Untrusted callers may specify it if it matches untrusted_set_sender, or if what
4088 is specified is the empty address. However, if a trusted caller does not
4089 specify a sender address for SMTP input, we leave sender_address unset. This
4090 causes the MAIL commands to be honoured. */
4092 if ((!smtp_input
&& sender_address
== NULL
) ||
4093 !receive_check_set_sender(sender_address
))
4095 /* Either the caller is not permitted to set a general sender, or this is
4096 non-SMTP input and the trusted caller has not set a sender. If there is no
4097 sender, or if a sender other than <> is set, override with the originator's
4098 login (which will get qualified below), except when checking things. */
4100 if (sender_address
== NULL
/* No sender_address set */
4102 (sender_address
[0] != 0 && /* Non-empty sender address, AND */
4103 !checking
&& /* Not running tests, AND */
4104 filter_test
== FTEST_NONE
)) /* Not testing a filter */
4106 sender_address
= originator_login
;
4107 sender_address_forced
= FALSE
;
4108 sender_address_domain
= 0;
4112 /* Remember whether an untrusted caller set the sender address */
4114 sender_set_untrusted
= sender_address
!= originator_login
&& !trusted_caller
;
4116 /* Ensure that the sender address is fully qualified unless it is the empty
4117 address, which indicates an error message, or doesn't exist (root caller, smtp
4118 interface, no -f argument). */
4120 if (sender_address
!= NULL
&& sender_address
[0] != 0 &&
4121 sender_address_domain
== 0)
4122 sender_address
= string_sprintf("%s@%s", local_part_quote(sender_address
),
4123 qualify_domain_sender
);
4125 DEBUG(D_receive
) debug_printf("sender address = %s\n", sender_address
);
4127 /* Handle a request to verify a list of addresses, or test them for delivery.
4128 This must follow the setting of the sender address, since routers can be
4129 predicated upon the sender. If no arguments are given, read addresses from
4130 stdin. Set debug_level to at least D_v to get full output for address testing.
4133 if (verify_address_mode
|| address_test_mode
)
4136 int flags
= vopt_qualify
;
4138 if (verify_address_mode
)
4140 if (!verify_as_sender
) flags
|= vopt_is_recipient
;
4141 DEBUG(D_verify
) debug_print_ids(US
"Verifying:");
4146 flags
|= vopt_is_recipient
;
4147 debug_selector
|= D_v
;
4148 debug_file
= stderr
;
4149 debug_fd
= fileno(debug_file
);
4150 DEBUG(D_verify
) debug_print_ids(US
"Address testing:");
4153 if (recipients_arg
< argc
)
4155 while (recipients_arg
< argc
)
4157 uschar
*s
= argv
[recipients_arg
++];
4160 BOOL finished
= FALSE
;
4161 uschar
*ss
= parse_find_address_end(s
, FALSE
);
4162 if (*ss
== ',') *ss
= 0; else finished
= TRUE
;
4163 test_address(s
, flags
, &exit_value
);
4166 while (*(++s
) != 0 && (*s
== ',' || isspace(*s
)));
4173 uschar
*s
= get_stdinput(NULL
, NULL
);
4174 if (s
== NULL
) break;
4175 test_address(s
, flags
, &exit_value
);
4179 exim_exit(exit_value
);
4182 /* Handle expansion checking. Either expand items on the command line, or read
4183 from stdin if there aren't any. If -Mset was specified, load the message so
4184 that its variables can be used, but restrict this facility to admin users. */
4188 if (msg_action_arg
> 0 && msg_action
== MSG_LOAD
)
4190 uschar spoolname
[256]; /* Not big_buffer; used in spool_read_header() */
4193 fprintf(stderr
, "exim: permission denied\n");
4196 message_id
= argv
[msg_action_arg
];
4197 (void)string_format(spoolname
, sizeof(spoolname
), "%s-H", message_id
);
4198 if (!spool_open_datafile(message_id
))
4199 printf ("Failed to load message datafile %s\n", message_id
);
4200 if (spool_read_header(spoolname
, TRUE
, FALSE
) != spool_read_OK
)
4201 printf ("Failed to load message %s\n", message_id
);
4204 /* Expand command line items */
4206 if (recipients_arg
< argc
)
4208 while (recipients_arg
< argc
)
4210 uschar
*s
= argv
[recipients_arg
++];
4211 uschar
*ss
= expand_string(s
);
4212 if (ss
== NULL
) printf ("Failed: %s\n", expand_string_message
);
4213 else printf("%s\n", CS ss
);
4221 char *(*fn_readline
)(char *) = NULL
;
4222 char *(*fn_addhist
)(char *) = NULL
;
4225 void *dlhandle
= set_readline(&fn_readline
, &fn_addhist
);
4231 uschar
*source
= get_stdinput(fn_readline
, fn_addhist
);
4232 if (source
== NULL
) break;
4233 ss
= expand_string(source
);
4235 printf ("Failed: %s\n", expand_string_message
);
4236 else printf("%s\n", CS ss
);
4240 if (dlhandle
!= NULL
) dlclose(dlhandle
);
4244 /* The data file will be open after -Mset */
4246 if (deliver_datafile
>= 0)
4248 (void)close(deliver_datafile
);
4249 deliver_datafile
= -1;
4252 exim_exit(EXIT_SUCCESS
);
4256 /* The active host name is normally the primary host name, but it can be varied
4257 for hosts that want to play several parts at once. We need to ensure that it is
4258 set for host checking, and for receiving messages. */
4260 smtp_active_hostname
= primary_hostname
;
4261 if (raw_active_hostname
!= NULL
)
4263 uschar
*nah
= expand_string(raw_active_hostname
);
4266 if (!expand_string_forcedfail
)
4267 log_write(0, LOG_MAIN
|LOG_PANIC_DIE
, "failed to expand \"%s\" "
4268 "(smtp_active_hostname): %s", raw_active_hostname
,
4269 expand_string_message
);
4271 else if (nah
[0] != 0) smtp_active_hostname
= nah
;
4274 /* Handle host checking: this facility mocks up an incoming SMTP call from a
4275 given IP address so that the blocking and relay configuration can be tested.
4276 Unless a sender_ident was set by -oMt, we discard it (the default is the
4277 caller's login name). An RFC 1413 call is made only if we are running in the
4278 test harness and an incoming interface and both ports are specified, because
4279 there is no TCP/IP call to find the ident for. */
4286 if (!sender_ident_set
)
4288 sender_ident
= NULL
;
4289 if (running_in_test_harness
&& sender_host_port
!= 0 &&
4290 interface_address
!= NULL
&& interface_port
!= 0)
4291 verify_get_ident(1413);
4294 /* In case the given address is a non-canonical IPv6 address, canonicize
4295 it. The code works for both IPv4 and IPv6, as it happens. */
4297 size
= host_aton(sender_host_address
, x
);
4298 sender_host_address
= store_get(48); /* large enough for full IPv6 */
4299 (void)host_nmtoa(size
, x
, -1, sender_host_address
, ':');
4301 /* Now set up for testing */
4303 host_build_sender_fullhost();
4307 sender_local
= FALSE
;
4308 sender_host_notsocket
= TRUE
;
4309 debug_file
= stderr
;
4310 debug_fd
= fileno(debug_file
);
4311 fprintf(stdout
, "\n**** SMTP testing session as if from host %s\n"
4312 "**** but without any ident (RFC 1413) callback.\n"
4313 "**** This is not for real!\n\n",
4314 sender_host_address
);
4316 if (verify_check_host(&hosts_connection_nolog
) == OK
)
4317 log_write_selector
&= ~L_smtp_connection
;
4318 log_write(L_smtp_connection
, LOG_MAIN
, "%s", smtp_get_connection_info());
4320 if (smtp_start_session())
4322 reset_point
= store_get(0);
4325 store_reset(reset_point
);
4326 if (smtp_setup_msg() <= 0) break;
4327 if (!receive_msg(FALSE
)) break;
4330 exim_exit(EXIT_SUCCESS
);
4334 /* Arrange for message reception if recipients or SMTP were specified;
4335 otherwise complain unless a version print (-bV) happened or this is a filter
4336 verification test. In the former case, show the configuration file name. */
4338 if (recipients_arg
>= argc
&& !extract_recipients
&& !smtp_input
)
4340 if (version_printed
)
4342 printf("Configuration file is %s\n", config_main_filename
);
4343 return EXIT_SUCCESS
;
4345 if (filter_test
== FTEST_NONE
)
4348 "Exim is a Mail Transfer Agent. It is normally called by Mail User Agents,\n"
4349 "not directly from a shell command line. Options and/or arguments control\n"
4350 "what it does when called. For a list of options, see the Exim documentation.\n");
4351 return EXIT_FAILURE
;
4356 /* If mua_wrapper is set, Exim is being used to turn an MUA that submits on the
4357 standard input into an MUA that submits to a smarthost over TCP/IP. We know
4358 that we are not called from inetd, because that is rejected above. The
4359 following configuration settings are forced here:
4361 (1) Synchronous delivery (-odi)
4362 (2) Errors to stderr (-oep == -oeq)
4363 (3) No parallel remote delivery
4364 (4) Unprivileged delivery
4366 We don't force overall queueing options because there are several of them;
4367 instead, queueing is avoided below when mua_wrapper is set. However, we do need
4368 to override any SMTP queueing. */
4372 synchronous_delivery
= TRUE
;
4373 arg_error_handling
= ERRORS_STDERR
;
4374 remote_max_parallel
= 1;
4375 deliver_drop_privilege
= TRUE
;
4377 queue_smtp_domains
= NULL
;
4381 /* Prepare to accept one or more new messages on the standard input. When a
4382 message has been read, its id is returned in message_id[]. If doing immediate
4383 delivery, we fork a delivery process for each received message, except for the
4384 last one, where we can save a process switch.
4386 It is only in non-smtp mode that error_handling is allowed to be changed from
4387 its default of ERRORS_SENDER by argument. (Idle thought: are any of the
4388 sendmail error modes other than -oem ever actually used? Later: yes.) */
4390 if (!smtp_input
) error_handling
= arg_error_handling
;
4392 /* If this is an inetd call, ensure that stderr is closed to prevent panic
4393 logging being sent down the socket and make an identd call to get the
4398 (void)fclose(stderr
);
4399 exim_nullstd(); /* Re-open to /dev/null */
4400 verify_get_ident(IDENT_PORT
);
4401 host_build_sender_fullhost();
4402 set_process_info("handling incoming connection from %s via inetd",
4406 /* If the sender host address has been set, build sender_fullhost if it hasn't
4407 already been done (which it will have been for inetd). This caters for the
4408 case when it is forced by -oMa. However, we must flag that it isn't a socket,
4409 so that the test for IP options is skipped for -bs input. */
4411 if (sender_host_address
!= NULL
&& sender_fullhost
== NULL
)
4413 host_build_sender_fullhost();
4414 set_process_info("handling incoming connection from %s via -oMa",
4416 sender_host_notsocket
= TRUE
;
4419 /* Otherwise, set the sender host as unknown except for inetd calls. This
4420 prevents host checking in the case of -bs not from inetd and also for -bS. */
4422 else if (!is_inetd
) sender_host_unknown
= TRUE
;
4424 /* If stdout does not exist, then dup stdin to stdout. This can happen
4425 if exim is started from inetd. In this case fd 0 will be set to the socket,
4426 but fd 1 will not be set. This also happens for passed SMTP channels. */
4428 if (fstat(1, &statbuf
) < 0) (void)dup2(0, 1);
4430 /* Set up the incoming protocol name and the state of the program. Root
4431 is allowed to force received protocol via the -oMr option above, and if we are
4432 in a non-local SMTP state it means we have come via inetd and the process info
4433 has already been set up. We don't set received_protocol here for smtp input,
4434 as it varies according to batch/HELO/EHLO/AUTH/TLS. */
4438 if (sender_local
) set_process_info("accepting a local SMTP message from <%s>",
4443 if (received_protocol
== NULL
)
4444 received_protocol
= string_sprintf("local%s", called_as
);
4445 set_process_info("accepting a local non-SMTP message from <%s>",
4449 /* Initialize the local_queue-only flag (this will be ignored if mua_wrapper is
4453 local_queue_only
= queue_only
;
4455 /* For non-SMTP and for batched SMTP input, check that there is enough space on
4456 the spool if so configured. On failure, we must not attempt to send an error
4457 message! (For interactive SMTP, the check happens at MAIL FROM and an SMTP
4458 error code is given.) */
4460 if ((!smtp_input
|| smtp_batched_input
) && !receive_check_fs(0))
4462 fprintf(stderr
, "exim: insufficient disk space\n");
4463 return EXIT_FAILURE
;
4466 /* If this is smtp input of any kind, handle the start of the SMTP
4473 if (verify_check_host(&hosts_connection_nolog
) == OK
)
4474 log_write_selector
&= ~L_smtp_connection
;
4475 log_write(L_smtp_connection
, LOG_MAIN
, "%s", smtp_get_connection_info());
4476 if (!smtp_start_session())
4479 exim_exit(EXIT_SUCCESS
);
4483 /* Otherwise, set up the input size limit here. */
4487 thismessage_size_limit
= expand_string_integer(message_size_limit
, TRUE
);
4488 if (expand_string_message
!= NULL
)
4490 if (thismessage_size_limit
== -1)
4491 log_write(0, LOG_MAIN
|LOG_PANIC_DIE
, "failed to expand "
4492 "message_size_limit: %s", expand_string_message
);
4494 log_write(0, LOG_MAIN
|LOG_PANIC_DIE
, "invalid value for "
4495 "message_size_limit: %s", expand_string_message
);
4499 /* Loop for several messages when reading SMTP input. If we fork any child
4500 processes, we don't want to wait for them unless synchronous delivery is
4501 requested, so set SIGCHLD to SIG_IGN in that case. This is not necessarily the
4502 same as SIG_DFL, despite the fact that documentation often lists the default as
4503 "ignore". This is a confusing area. This is what I know:
4505 At least on some systems (e.g. Solaris), just setting SIG_IGN causes child
4506 processes that complete simply to go away without ever becoming defunct. You
4507 can't then wait for them - but we don't want to wait for them in the
4508 non-synchronous delivery case. However, this behaviour of SIG_IGN doesn't
4509 happen for all OS (e.g. *BSD is different).
4511 But that's not the end of the story. Some (many? all?) systems have the
4512 SA_NOCLDWAIT option for sigaction(). This requests the behaviour that Solaris
4513 has by default, so it seems that the difference is merely one of default
4514 (compare restarting vs non-restarting signals).
4516 To cover all cases, Exim sets SIG_IGN with SA_NOCLDWAIT here if it can. If not,
4517 it just sets SIG_IGN. To be on the safe side it also calls waitpid() at the end
4518 of the loop below. Paranoia rules.
4520 February 2003: That's *still* not the end of the story. There are now versions
4521 of Linux (where SIG_IGN does work) that are picky. If, having set SIG_IGN, a
4522 process then calls waitpid(), a grumble is written to the system log, because
4523 this is logically inconsistent. In other words, it doesn't like the paranoia.
4524 As a consequenc of this, the waitpid() below is now excluded if we are sure
4525 that SIG_IGN works. */
4527 if (!synchronous_delivery
)
4530 struct sigaction act
;
4531 act
.sa_handler
= SIG_IGN
;
4532 sigemptyset(&(act
.sa_mask
));
4533 act
.sa_flags
= SA_NOCLDWAIT
;
4534 sigaction(SIGCHLD
, &act
, NULL
);
4536 signal(SIGCHLD
, SIG_IGN
);
4540 /* Save the current store pool point, for resetting at the start of
4541 each message, and save the real sender address, if any. */
4543 reset_point
= store_get(0);
4544 real_sender_address
= sender_address
;
4546 /* Loop to receive messages; receive_msg() returns TRUE if there are more
4547 messages to be read (SMTP input), or FALSE otherwise (not SMTP, or SMTP channel
4552 store_reset(reset_point
);
4555 /* In the SMTP case, we have to handle the initial SMTP input and build the
4556 recipients list, before calling receive_msg() to read the message proper.
4557 Whatever sender address is actually given in the SMTP transaction is
4558 actually ignored for local senders - we use the actual sender, which is
4559 normally either the underlying user running this process or a -f argument
4560 provided by a trusted caller. It is saved in real_sender_address.
4562 However, if this value is NULL, we are dealing with a trusted caller when
4563 -f was not used; in this case, the SMTP sender is allowed to stand.
4565 Also, if untrusted_set_sender is set, we permit sender addresses that match
4566 anything in its list.
4568 The variable raw_sender_address holds the sender address before rewriting. */
4573 if ((rc
= smtp_setup_msg()) > 0)
4575 if (real_sender_address
!= NULL
&&
4576 !receive_check_set_sender(sender_address
))
4578 sender_address
= raw_sender
= real_sender_address
;
4579 sender_address_unrewritten
= NULL
;
4581 more
= receive_msg(extract_recipients
);
4582 if (message_id
[0] == 0)
4585 exim_exit(EXIT_FAILURE
);
4588 else exim_exit((rc
== 0)? EXIT_SUCCESS
: EXIT_FAILURE
);
4591 /* In the non-SMTP case, we have all the information from the command
4592 line, but must process it in case it is in the more general RFC822
4593 format, and in any case, to detect syntax errors. Also, it appears that
4594 the use of comma-separated lists as single arguments is common, so we
4595 had better support them. */
4601 int count
= argc
- recipients_arg
;
4602 uschar
**list
= argv
+ recipients_arg
;
4604 /* These options cannot be changed dynamically for non-SMTP messages */
4606 active_local_sender_retain
= local_sender_retain
;
4607 active_local_from_check
= local_from_check
;
4609 /* Save before any rewriting */
4611 raw_sender
= string_copy(sender_address
);
4613 /* Loop for each argument */
4615 for (i
= 0; i
< count
; i
++)
4617 int start
, end
, domain
;
4619 uschar
*s
= list
[i
];
4621 /* Loop for each comma-separated address */
4625 BOOL finished
= FALSE
;
4627 uschar
*ss
= parse_find_address_end(s
, FALSE
);
4629 if (*ss
== ',') *ss
= 0; else finished
= TRUE
;
4631 /* Check max recipients - if -t was used, these aren't recipients */
4633 if (recipients_max
> 0 && ++rcount
> recipients_max
&&
4634 !extract_recipients
)
4636 if (error_handling
== ERRORS_STDERR
)
4638 fprintf(stderr
, "exim: too many recipients\n");
4639 exim_exit(EXIT_FAILURE
);
4644 moan_to_sender(ERRMESS_TOOMANYRECIP
, NULL
, NULL
, stdin
, TRUE
)?
4645 errors_sender_rc
: EXIT_FAILURE
;
4650 parse_extract_address(s
, &errmess
, &start
, &end
, &domain
, FALSE
);
4652 if (domain
== 0 && !allow_unqualified_recipient
)
4655 errmess
= US
"unqualified recipient address not allowed";
4658 if (recipient
== NULL
)
4660 if (error_handling
== ERRORS_STDERR
)
4662 fprintf(stderr
, "exim: bad recipient address \"%s\": %s\n",
4663 string_printing(list
[i
]), errmess
);
4664 exim_exit(EXIT_FAILURE
);
4670 eblock
.text1
= string_printing(list
[i
]);
4671 eblock
.text2
= errmess
;
4673 moan_to_sender(ERRMESS_BADARGADDRESS
, &eblock
, NULL
, stdin
, TRUE
)?
4674 errors_sender_rc
: EXIT_FAILURE
;
4678 receive_add_recipient(recipient
, -1);
4681 while (*(++s
) != 0 && (*s
== ',' || isspace(*s
)));
4685 /* Show the recipients when debugging */
4690 if (sender_address
!= NULL
) debug_printf("Sender: %s\n", sender_address
);
4691 if (recipients_list
!= NULL
)
4693 debug_printf("Recipients:\n");
4694 for (i
= 0; i
< recipients_count
; i
++)
4695 debug_printf(" %s\n", recipients_list
[i
].address
);
4699 /* Run the acl_not_smtp_start ACL if required. The result of the ACL is
4700 ignored; rejecting here would just add complication, and it can just as
4701 well be done later. Allow $recipients to be visible in the ACL. */
4703 if (acl_not_smtp_start
!= NULL
)
4705 uschar
*user_msg
, *log_msg
;
4706 enable_dollar_recipients
= TRUE
;
4707 (void)acl_check(ACL_WHERE_NOTSMTP_START
, NULL
, acl_not_smtp_start
,
4708 &user_msg
, &log_msg
);
4709 enable_dollar_recipients
= FALSE
;
4712 /* Read the data for the message. If filter_test is not FTEST_NONE, this
4713 will just read the headers for the message, and not write anything onto the
4716 message_ended
= END_NOTENDED
;
4717 more
= receive_msg(extract_recipients
);
4719 /* more is always FALSE here (not SMTP message) when reading a message
4720 for real; when reading the headers of a message for filter testing,
4721 it is TRUE if the headers were terminated by '.' and FALSE otherwise. */
4723 if (message_id
[0] == 0) exim_exit(EXIT_FAILURE
);
4724 } /* Non-SMTP message reception */
4726 /* If this is a filter testing run, there are headers in store, but
4727 no message on the spool. Run the filtering code in testing mode, setting
4728 the domain to the qualify domain and the local part to the current user,
4729 unless they have been set by options. The prefix and suffix are left unset
4730 unless specified. The the return path is set to to the sender unless it has
4731 already been set from a return-path header in the message. */
4733 if (filter_test
!= FTEST_NONE
)
4735 deliver_domain
= (ftest_domain
!= NULL
)?
4736 ftest_domain
: qualify_domain_recipient
;
4737 deliver_domain_orig
= deliver_domain
;
4738 deliver_localpart
= (ftest_localpart
!= NULL
)?
4739 ftest_localpart
: originator_login
;
4740 deliver_localpart_orig
= deliver_localpart
;
4741 deliver_localpart_prefix
= ftest_prefix
;
4742 deliver_localpart_suffix
= ftest_suffix
;
4743 deliver_home
= originator_home
;
4745 if (return_path
== NULL
)
4747 printf("Return-path copied from sender\n");
4748 return_path
= string_copy(sender_address
);
4752 printf("Return-path = %s\n", (return_path
[0] == 0)? US
"<>" : return_path
);
4754 printf("Sender = %s\n", (sender_address
[0] == 0)? US
"<>" : sender_address
);
4756 receive_add_recipient(
4757 string_sprintf("%s%s%s@%s",
4758 (ftest_prefix
== NULL
)? US
"" : ftest_prefix
,
4760 (ftest_suffix
== NULL
)? US
"" : ftest_suffix
,
4761 deliver_domain
), -1);
4763 printf("Recipient = %s\n", recipients_list
[0].address
);
4764 if (ftest_prefix
!= NULL
) printf("Prefix = %s\n", ftest_prefix
);
4765 if (ftest_suffix
!= NULL
) printf("Suffix = %s\n", ftest_suffix
);
4767 (void)chdir("/"); /* Get away from wherever the user is running this from */
4769 /* Now we run either a system filter test, or a user filter test, or both.
4770 In the latter case, headers added by the system filter will persist and be
4771 available to the user filter. We need to copy the filter variables
4774 if ((filter_test
& FTEST_SYSTEM
) != 0)
4776 if (!filter_runtest(filter_sfd
, filter_test_sfile
, TRUE
, more
))
4777 exim_exit(EXIT_FAILURE
);
4780 memcpy(filter_sn
, filter_n
, sizeof(filter_sn
));
4782 if ((filter_test
& FTEST_USER
) != 0)
4784 if (!filter_runtest(filter_ufd
, filter_test_ufile
, FALSE
, more
))
4785 exim_exit(EXIT_FAILURE
);
4788 exim_exit(EXIT_SUCCESS
);
4791 /* Else act on the result of message reception. We should not get here unless
4792 message_id[0] is non-zero. If queue_only is set, local_queue_only will be
4793 TRUE. If it is not, check on the number of messages received in this
4794 connection. If that's OK and queue_only_load is set, check that the load
4795 average is below it. If it is not, set local_queue_only TRUE. Note that it
4796 then remains this way for any subsequent messages on the same SMTP connection.
4797 This is a deliberate choice; even though the load average may fall, it
4798 doesn't seem right to deliver later messages on the same call when not
4799 delivering earlier ones. */
4801 if (!local_queue_only
)
4803 if (smtp_accept_queue_per_connection
> 0 &&
4804 receive_messagecount
> smtp_accept_queue_per_connection
)
4806 local_queue_only
= TRUE
;
4807 queue_only_reason
= 2;
4809 else if (queue_only_load
>= 0)
4811 local_queue_only
= (load_average
= os_getloadavg()) > queue_only_load
;
4812 if (local_queue_only
) queue_only_reason
= 3;
4816 /* If running as an MUA wrapper, all queueing options and freezing options
4820 local_queue_only
= queue_only_policy
= deliver_freeze
= FALSE
;
4822 /* Log the queueing here, when it will get a message id attached, but
4823 not if queue_only is set (case 0). Case 1 doesn't happen here (too many
4826 if (local_queue_only
) switch(queue_only_reason
)
4829 log_write(L_delay_delivery
,
4830 LOG_MAIN
, "no immediate delivery: more than %d messages "
4831 "received in one connection", smtp_accept_queue_per_connection
);
4835 log_write(L_delay_delivery
,
4836 LOG_MAIN
, "no immediate delivery: load average %.2f",
4837 (double)load_average
/1000.0);
4841 /* Else do the delivery unless the ACL or local_scan() called for queue only
4842 or froze the message. Always deliver in a separate process. A fork failure is
4843 not a disaster, as the delivery will eventually happen on a subsequent queue
4844 run. The search cache must be tidied before the fork, as the parent will
4845 do it before exiting. The child will trigger a lookup failure and
4846 thereby defer the delivery if it tries to use (for example) a cached ldap
4847 connection that the parent has called unbind on. */
4849 else if (!queue_only_policy
&& !deliver_freeze
)
4854 if ((pid
= fork()) == 0)
4857 close_unwanted(); /* Close unwanted file descriptors and TLS */
4858 exim_nullstd(); /* Ensure std{in,out,err} exist */
4860 /* Re-exec Exim if we need to regain privilege (note: in mua_wrapper
4861 mode, deliver_drop_privilege is forced TRUE). */
4863 if (geteuid() != root_uid
&& !deliver_drop_privilege
&& !unprivileged
)
4865 (void)child_exec_exim(CEE_EXEC_EXIT
, FALSE
, NULL
, FALSE
, 2, US
"-Mc",
4867 /* Control does not return here. */
4870 /* No need to re-exec */
4872 rc
= deliver_message(message_id
, FALSE
, FALSE
);
4874 _exit((!mua_wrapper
|| rc
== DELIVER_MUA_SUCCEEDED
)?
4875 EXIT_SUCCESS
: EXIT_FAILURE
);
4880 log_write(0, LOG_MAIN
|LOG_PANIC
, "failed to fork automatic delivery "
4881 "process: %s", strerror(errno
));
4884 /* In the parent, wait if synchronous delivery is required. This will
4885 always be the case in MUA wrapper mode. */
4887 else if (synchronous_delivery
)
4890 while (wait(&status
) != pid
);
4891 if ((status
& 0x00ff) != 0)
4892 log_write(0, LOG_MAIN
|LOG_PANIC
,
4893 "process %d crashed with signal %d while delivering %s",
4894 (int)pid
, status
& 0x00ff, message_id
);
4895 if (mua_wrapper
&& (status
& 0xffff) != 0) exim_exit(EXIT_FAILURE
);
4899 /* The loop will repeat if more is TRUE. If we do not know know that the OS
4900 automatically reaps children (see comments above the loop), clear away any
4901 finished subprocesses here, in case there are lots of messages coming in
4902 from the same source. */
4904 #ifndef SIG_IGN_WORKS
4905 while (waitpid(-1, NULL
, WNOHANG
) > 0);
4909 exim_exit(EXIT_SUCCESS
); /* Never returns */
4910 return 0; /* To stop compiler warning */