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git.ipfire.org Git - people/ms/dma.git/blob - dma.c
e6462f22544c0e80e5714a67b7bee138743d8cc6
2 * Copyright (c) 2008 The DragonFly Project. All rights reserved.
4 * This code is derived from software contributed to The DragonFly Project
5 * by Simon 'corecode' Schubert <corecode@fs.ei.tum.de>.
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in
15 * the documentation and/or other materials provided with the
17 * 3. Neither the name of The DragonFly Project nor the names of its
18 * contributors may be used to endorse or promote products derived
19 * from this software without specific, prior written permission.
21 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
22 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
23 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
24 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
25 * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
26 * INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING,
27 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
28 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
29 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
30 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
31 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
37 #include <sys/param.h>
38 #include <sys/types.h>
39 #include <sys/queue.h>
62 static void deliver(struct qitem
*);
64 struct aliases aliases
= LIST_HEAD_INITIALIZER(aliases
);
65 struct strlist tmpfs
= SLIST_HEAD_INITIALIZER(tmpfs
);
66 struct authusers authusers
= LIST_HEAD_INITIALIZER(authusers
);
67 char username
[USERNAME_SIZE
];
69 const char *logident_base
;
70 char errmsg
[ERRMSG_SIZE
];
72 static int daemonize
= 1;
73 static int doqueue
= 0;
75 struct config config
= {
78 .aliases
= "/etc/aliases",
79 .spooldir
= "/var/spool/dma",
84 .masquerade_host
= NULL
,
85 .masquerade_user
= NULL
,
90 sighup_handler(int signo
)
92 (void)signo
; /* so that gcc doesn't complain */
96 set_from(struct queue
*queue
, const char *osender
)
103 } else if (getenv("EMAIL") != NULL
) {
104 addr
= getenv("EMAIL");
106 if (config
.masquerade_user
)
107 addr
= config
.masquerade_user
;
112 if (!strchr(addr
, '@')) {
113 const char *from_host
= hostname();
115 if (config
.masquerade_host
)
116 from_host
= config
.masquerade_host
;
118 if (asprintf(&sender
, "%s@%s", addr
, from_host
) <= 0)
121 sender
= strdup(addr
);
126 if (strchr(sender
, '\n') != NULL
) {
131 queue
->sender
= sender
;
138 yyin
= fopen(config
.aliases
, "r");
141 * Non-existing aliases file is not a fatal error
145 /* Other problems are. */
149 return (-1); /* fatal error, probably malloc() */
155 do_alias(struct queue
*queue
, const char *addr
)
161 LIST_FOREACH(al
, &aliases
, next
) {
162 if (strcmp(al
->alias
, addr
) != 0)
164 SLIST_FOREACH(sit
, &al
->dests
, next
) {
165 if (add_recp(queue
, sit
->str
, EXPAND_ADDR
) != 0)
175 add_recp(struct queue
*queue
, const char *str
, int expand
)
177 struct qitem
*it
, *tit
;
182 it
= calloc(1, sizeof(*it
));
185 it
->addr
= strdup(str
);
186 if (it
->addr
== NULL
)
189 it
->sender
= queue
->sender
;
190 host
= strrchr(it
->addr
, '@');
192 (strcmp(host
+ 1, hostname()) == 0 ||
193 strcmp(host
+ 1, "localhost") == 0)) {
196 LIST_FOREACH(tit
, &queue
->queue
, next
) {
197 /* weed out duplicate dests */
198 if (strcmp(tit
->addr
, it
->addr
) == 0) {
204 LIST_INSERT_HEAD(&queue
->queue
, it
, next
);
207 * Do local delivery if there is no @.
208 * Do not do local delivery when NULLCLIENT is set.
210 if (strrchr(it
->addr
, '@') == NULL
&& (config
.features
& NULLCLIENT
) == 0) {
213 aliased
= do_alias(queue
, it
->addr
);
214 if (!aliased
&& expand
== EXPAND_WILDCARD
)
215 aliased
= do_alias(queue
, "*");
219 LIST_REMOVE(it
, next
);
221 /* Local destination, check */
222 pw
= getpwnam(it
->addr
);
225 /* XXX read .forward */
241 static struct qitem
*
242 go_background(struct queue
*queue
)
248 if (daemonize
&& daemon(0, 0) != 0) {
249 syslog(LOG_ERR
, "can not daemonize: %m");
254 bzero(&sa
, sizeof(sa
));
255 sa
.sa_handler
= SIG_IGN
;
256 sigaction(SIGCHLD
, &sa
, NULL
);
258 LIST_FOREACH(it
, &queue
->queue
, next
) {
259 /* No need to fork for the last dest */
260 if (LIST_NEXT(it
, next
) == NULL
)
266 syslog(LOG_ERR
, "can not fork: %m");
274 * return and deliver mail
278 * If necessary, acquire the queue and * mail files.
279 * If this fails, we probably were raced by another
280 * process. It is okay to be raced if we're supposed
281 * to flush the queue.
283 setlogident("%s", it
->queueid
);
284 switch (acquirespool(it
)) {
290 syslog(LOG_WARNING
, "could not lock queue file");
295 dropspool(queue
, it
);
308 syslog(LOG_CRIT
, "reached dead code");
313 deliver(struct qitem
*it
)
316 unsigned int backoff
= MIN_RETRY
, slept
;
320 snprintf(errmsg
, sizeof(errmsg
), "unknown bounce reason");
323 syslog(LOG_INFO
, "trying delivery");
326 error
= deliver_remote(it
);
328 error
= deliver_local(it
);
333 syslog(LOG_INFO
, "delivery successful");
337 if (stat(it
->queuefn
, &st
) != 0) {
338 syslog(LOG_ERR
, "lost queue file `%s'", it
->queuefn
);
341 if (gettimeofday(&now
, NULL
) == 0 &&
342 (now
.tv_sec
- st
.st_mtim
.tv_sec
> MAX_TIMEOUT
)) {
343 snprintf(errmsg
, sizeof(errmsg
),
344 "Could not deliver for the last %d seconds. Giving up.",
348 for (slept
= 0; slept
< backoff
;) {
349 slept
+= SLEEP_TIMEOUT
- sleep(SLEEP_TIMEOUT
);
350 if (flushqueue_since(slept
)) {
355 if (slept
>= backoff
) {
356 /* pick the next backoff between [1.5, 2.5) times backoff */
357 backoff
= backoff
+ backoff
/ 2 + random() % backoff
;
358 if (backoff
> MAX_RETRY
)
374 run_queue(struct queue
*queue
)
378 if (LIST_EMPTY(&queue
->queue
))
381 it
= go_background(queue
);
387 show_queue(struct queue
*queue
)
390 int locked
= 0; /* XXX */
392 if (LIST_EMPTY(&queue
->queue
)) {
393 printf("Mail queue is empty\n");
397 LIST_FOREACH(it
, &queue
->queue
, next
) {
398 printf("ID\t: %s%s\n"
403 it
->sender
, it
->addr
);
405 if (LIST_NEXT(it
, next
) != NULL
)
414 * - use group permissions
415 * - proper sysexit codes
419 main(int argc
, char **argv
)
421 struct sigaction act
;
425 int nodot
= 0, showq
= 0, queue_only
= 0;
426 int recp_from_header
= 0;
431 * We never run as root. If called by root, drop permissions
434 if (geteuid() == 0 || getuid() == 0) {
438 pw
= getpwnam(DMA_ROOT_USER
);
441 errx(1, "user '%s' not found", DMA_ROOT_USER
);
443 err(1, "cannot drop root privileges");
446 if (setuid(pw
->pw_uid
) != 0)
447 err(1, "cannot drop root privileges");
449 if (geteuid() == 0 || getuid() == 0)
450 errx(1, "cannot drop root privileges");
456 bzero(&queue
, sizeof(queue
));
457 LIST_INIT(&queue
.queue
);
459 if (strcmp(argv
[0], "mailq") == 0) {
463 errx(1, "invalid arguments");
465 } else if (strcmp(argv
[0], "newaliases") == 0) {
466 logident_base
= "dma";
469 if (read_aliases() != 0)
470 errx(1, "could not parse aliases file `%s'", config
.aliases
);
475 while ((ch
= getopt(argc
, argv
, ":A:b:B:C:d:Df:F:h:iL:N:no:O:q:r:R:tUV:vX:")) != -1) {
478 /* -AX is being ignored, except for -A{c,m} */
479 if (optarg
[0] == 'c' || optarg
[0] == 'm') {
482 /* else FALLTRHOUGH */
484 /* -bX is being ignored, except for -bp */
485 if (optarg
[0] == 'p') {
488 } else if (optarg
[0] == 'q') {
492 /* else FALLTRHOUGH */
497 logident_base
= optarg
;
505 recp_from_header
= 1;
509 /* -oX is being ignored, except for -oi */
510 if (optarg
[0] != 'i')
512 /* else FALLTRHOUGH */
520 /* Don't let getopt slup up other arguments */
521 if (optarg
&& *optarg
== '-')
526 /* Ignored options */
549 fprintf(stderr
, "invalid argument: `-%c'\n", optopt
);
557 if (argc
!= 0 && (showq
|| doqueue
))
558 errx(1, "sending mail and queue operations are mutually exclusive");
560 if (showq
+ doqueue
> 1)
561 errx(1, "conflicting queue operations");
564 if (logident_base
== NULL
)
565 logident_base
= "dma";
568 act
.sa_handler
= sighup_handler
;
570 sigemptyset(&act
.sa_mask
);
571 if (sigaction(SIGHUP
, &act
, NULL
) != 0)
572 syslog(LOG_WARNING
, "can not set signal handler: %m");
574 parse_conf(CONF_PATH
"/dma.conf");
576 if (config
.authpath
!= NULL
)
577 parse_authfile(config
.authpath
);
580 if (load_queue(&queue
) < 0)
581 errlog(1, "can not load queue");
588 if (load_queue(&queue
) < 0)
589 errlog(1, "can not load queue");
594 if (read_aliases() != 0)
595 errlog(1, "could not parse aliases file `%s'", config
.aliases
);
597 if ((sender
= set_from(&queue
, sender
)) == NULL
)
600 if (newspoolf(&queue
) != 0)
601 errlog(1, "can not create temp file in `%s'", config
.spooldir
);
603 setlogident("%s", queue
.id
);
605 for (i
= 0; i
< argc
; i
++) {
606 if (add_recp(&queue
, argv
[i
], EXPAND_WILDCARD
) != 0)
607 errlogx(1, "invalid recipient `%s'", argv
[i
]);
610 if (LIST_EMPTY(&queue
.queue
) && !recp_from_header
)
611 errlogx(1, "no recipients");
613 if (readmail(&queue
, nodot
, recp_from_header
) != 0)
614 errlog(1, "can not read mail");
616 if (LIST_EMPTY(&queue
.queue
))
617 errlogx(1, "no recipients");
619 if (linkspool(&queue
) != 0)
620 errlog(1, "can not create spools");
622 /* From here on the mail is safe. */
624 if (config
.features
& DEFER
|| queue_only
)