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
34 * $DragonFly: src/libexec/dma/dma.c,v 1.5 2008/09/30 17:47:21 swildner Exp $
37 #include <sys/param.h>
38 #include <sys/queue.h>
40 #include <sys/types.h>
44 #include <openssl/ssl.h>
45 #endif /* HAVE_CRYPTO */
67 static void deliver(struct qitem
*);
68 static int add_recp(struct queue
*, const char *, const char *, int);
70 struct aliases aliases
= LIST_HEAD_INITIALIZER(aliases
);
71 static struct strlist tmpfs
= SLIST_HEAD_INITIALIZER(tmpfs
);
72 struct virtusers virtusers
= LIST_HEAD_INITIALIZER(virtusers
);
73 struct authusers authusers
= LIST_HEAD_INITIALIZER(authusers
);
74 static int daemonize
= 1;
75 struct config
*config
;
80 static char name
[MAXHOSTNAMELEN
+1];
82 if (gethostname(name
, sizeof(name
)) != 0)
83 strcpy(name
, "(unknown hostname)");
89 set_from(const char *osender
)
94 if ((config
->features
& VIRTUAL
) != 0) {
95 SLIST_FOREACH(v
, &virtusers
, next
) {
96 if (strcmp(v
->login
, getlogin()) == 0) {
97 sender
= strdup(v
->address
);
106 sender
= strdup(osender
);
110 if (asprintf(&sender
, "%s@%s", getlogin(), hostname()) <= 0)
114 if (strchr(sender
, '\n') != NULL
) {
126 yyin
= fopen(config
->aliases
, "r");
128 return (0); /* not fatal */
130 return (-1); /* fatal error, probably malloc() */
136 add_recp(struct queue
*queue
, const char *str
, const char *sender
, int expand
)
138 struct qitem
*it
, *tit
;
145 it
= calloc(1, sizeof(*it
));
148 it
->addr
= strdup(str
);
149 if (it
->addr
== NULL
)
153 host
= strrchr(it
->addr
, '@');
155 (strcmp(host
+ 1, hostname()) == 0 ||
156 strcmp(host
+ 1, "localhost") == 0)) {
159 LIST_FOREACH(tit
, &queue
->queue
, next
) {
160 /* weed out duplicate dests */
161 if (strcmp(tit
->addr
, it
->addr
) == 0) {
167 LIST_INSERT_HEAD(&queue
->queue
, it
, next
);
168 if (strrchr(it
->addr
, '@') == NULL
) {
171 LIST_FOREACH(al
, &aliases
, next
) {
172 if (strcmp(al
->alias
, it
->addr
) != 0)
174 SLIST_FOREACH(sit
, &al
->dests
, next
) {
175 if (add_recp(queue
, sit
->str
, sender
, 1) != 0)
181 LIST_REMOVE(it
, next
);
183 /* Local destination, check */
184 pw
= getpwnam(it
->addr
);
207 SLIST_FOREACH(t
, &tmpfs
, next
) {
213 gentempf(struct queue
*queue
)
219 if (snprintf(fn
, sizeof(fn
), "%s/%s", config
->spooldir
, "tmp_XXXXXXXXXX") <= 0)
225 queue
->tmpf
= strdup(fn
);
226 if (queue
->tmpf
== NULL
) {
230 t
= malloc(sizeof(*t
));
232 t
->str
= queue
->tmpf
;
233 SLIST_INSERT_HEAD(&tmpfs
, t
, next
);
242 * queue-id1 envelope-to1
243 * queue-id2 envelope-to2
248 * queue ids are unique, formed from the inode of the spool file
249 * and a unique identifier.
252 preparespool(struct queue
*queue
, const char *sender
)
254 char line
[1000]; /* by RFC2822 */
261 error
= snprintf(line
, sizeof(line
), "%s\n", sender
);
262 if (error
< 0 || (size_t)error
>= sizeof(line
)) {
266 if (write(queue
->mailfd
, line
, error
) != error
)
269 queuef
= fdopen(queue
->mailfd
, "r+");
274 * Assign queue id to each dest.
276 if (fstat(queue
->mailfd
, &st
) != 0)
278 queue
->id
= st
.st_ino
;
279 LIST_FOREACH(it
, &queue
->queue
, next
) {
280 if (asprintf(&it
->queueid
, "%"PRIxMAX
".%"PRIxPTR
,
281 queue
->id
, (uintptr_t)it
) <= 0)
283 if (asprintf(&it
->queuefn
, "%s/%s",
284 config
->spooldir
, it
->queueid
) <= 0)
286 /* File may not exist yet */
287 if (stat(it
->queuefn
, &st
) == 0)
290 error
= snprintf(line
, sizeof(line
), "%s %s\n",
291 it
->queueid
, it
->addr
);
292 if (error
< 0 || (size_t)error
>= sizeof(line
))
294 if (write(queue
->mailfd
, line
, error
) != error
)
298 if (write(queue
->mailfd
, line
, 1) != 1)
301 hdrlen
= lseek(queue
->mailfd
, 0, SEEK_CUR
);
302 LIST_FOREACH(it
, &queue
->queue
, next
) {
316 error
= strftime(str
, sizeof(str
), "%a, %d %b %Y %T %z",
319 strcpy(str
, "(date fail)");
324 readmail(struct queue
*queue
, const char *sender
, int nodot
)
326 char line
[1000]; /* by RFC2822 */
330 error
= snprintf(line
, sizeof(line
), "\
331 Received: from %s (uid %d)\n\
332 \t(envelope-from %s)\n\
336 getlogin(), getuid(),
341 if (error
< 0 || (size_t)error
>= sizeof(line
))
343 if (write(queue
->mailfd
, line
, error
) != error
)
346 while (!feof(stdin
)) {
347 if (fgets(line
, sizeof(line
), stdin
) == NULL
)
349 linelen
= strlen(line
);
350 if (linelen
== 0 || line
[linelen
- 1] != '\n') {
351 errno
= EINVAL
; /* XXX mark permanent errors */
354 if (!nodot
&& linelen
== 2 && line
[0] == '.')
356 if ((size_t)write(queue
->mailfd
, line
, linelen
) != linelen
)
359 if (fsync(queue
->mailfd
) != 0)
365 linkspool(struct queue
*queue
)
369 LIST_FOREACH(it
, &queue
->queue
, next
) {
370 if (link(queue
->tmpf
, it
->queuefn
) != 0)
377 LIST_FOREACH(it
, &queue
->queue
, next
) {
383 static struct qitem
*
384 go_background(struct queue
*queue
)
390 if (daemonize
&& daemon(0, 0) != 0) {
391 syslog(LOG_ERR
, "can not daemonize: %m");
396 bzero(&sa
, sizeof(sa
));
397 sa
.sa_flags
= SA_NOCLDWAIT
;
398 sa
.sa_handler
= SIG_IGN
;
399 sigaction(SIGCHLD
, &sa
, NULL
);
401 LIST_FOREACH(it
, &queue
->queue
, next
) {
402 /* No need to fork for the last dest */
403 if (LIST_NEXT(it
, next
) == NULL
)
409 syslog(LOG_ERR
, "can not fork: %m");
417 * return and deliver mail
431 syslog(LOG_CRIT
, "reached dead code");
436 bounce(struct qitem
*it
, const char *reason
)
438 struct queue bounceq
;
443 /* Don't bounce bounced mails */
444 if (it
->sender
[0] == 0) {
445 syslog(LOG_CRIT
, "%s: delivery panic: can't bounce a bounce",
450 syslog(LOG_ERR
, "%s: delivery failed, bouncing",
453 LIST_INIT(&bounceq
.queue
);
454 if (add_recp(&bounceq
, it
->sender
, "", 1) != 0)
456 if (gentempf(&bounceq
) != 0)
458 if (preparespool(&bounceq
, "") != 0)
461 bit
= LIST_FIRST(&bounceq
.queue
);
462 error
= fprintf(bit
->queuef
, "\
463 Received: from MAILER-DAEMON\n\
467 X-Original-To: <%s>\n\
468 From: MAILER-DAEMON <>\n\
470 Subject: Mail delivery failed\n\
471 Message-Id: <%"PRIxMAX
"@%s>\n\
474 This is the %s at %s.\n\
476 There was an error delivering your mail to <%s>.\n\
480 Message headers follow.\n\
488 bounceq
.id
, hostname(),
495 if (fflush(bit
->queuef
) != 0)
498 if (fseek(it
->queuef
, it
->hdrlen
, SEEK_SET
) != 0)
500 while (!feof(it
->queuef
)) {
501 if (fgets(line
, sizeof(line
), it
->queuef
) == NULL
)
505 write(bounceq
.mailfd
, line
, strlen(line
));
507 if (fsync(bounceq
.mailfd
) != 0)
509 if (linkspool(&bounceq
) != 0)
516 bit
= go_background(&bounceq
);
521 syslog(LOG_CRIT
, "%s: error creating bounce: %m", it
->queueid
);
527 deliver_local(struct qitem
*it
, const char **errmsg
)
535 time_t now
= time(NULL
);
537 error
= snprintf(fn
, sizeof(fn
), "%s/%s", _PATH_MAILDIR
, it
->addr
);
538 if (error
< 0 || (size_t)error
>= sizeof(fn
)) {
539 syslog(LOG_ERR
, "%s: local delivery deferred: %m",
544 /* mailx removes users mailspool file if empty, so open with O_CREAT */
545 mbox
= open(fn
, O_WRONLY
| O_EXLOCK
| O_APPEND
| O_CREAT
);
547 syslog(LOG_ERR
, "%s: local delivery deferred: can not open `%s': %m",
551 mboxlen
= lseek(mbox
, 0, SEEK_CUR
);
553 if (fseek(it
->queuef
, it
->hdrlen
, SEEK_SET
) != 0) {
554 syslog(LOG_ERR
, "%s: local delivery deferred: can not seek: %m",
559 error
= snprintf(line
, sizeof(line
), "From %s\t%s", it
->sender
, ctime(&now
));
560 if (error
< 0 || (size_t)error
>= sizeof(line
)) {
561 syslog(LOG_ERR
, "%s: local delivery deferred: can not write header: %m",
565 if (write(mbox
, line
, error
) != error
)
568 while (!feof(it
->queuef
)) {
569 if (fgets(line
, sizeof(line
), it
->queuef
) == NULL
)
571 linelen
= strlen(line
);
572 if (linelen
== 0 || line
[linelen
- 1] != '\n') {
573 syslog(LOG_CRIT
, "%s: local delivery failed: corrupted queue file",
575 *errmsg
= "corrupted queue file";
580 if (strncmp(line
, "From ", 5) == 0) {
581 const char *gt
= ">";
583 if (write(mbox
, gt
, 1) != 1)
586 if ((size_t)write(mbox
, line
, linelen
) != linelen
)
590 if (write(mbox
, line
, 1) != 1)
596 syslog(LOG_ERR
, "%s: local delivery failed: write error: %m",
600 if (ftruncate(mbox
, mboxlen
) != 0)
601 syslog(LOG_WARNING
, "%s: error recovering mbox `%s': %m",
608 deliver(struct qitem
*it
)
611 unsigned int backoff
= MIN_RETRY
;
612 const char *errmsg
= "unknown bounce reason";
616 syslog(LOG_INFO
, "%s: mail from=<%s> to=<%s>",
617 it
->queueid
, it
->sender
, it
->addr
);
620 syslog(LOG_INFO
, "%s: trying delivery",
624 error
= deliver_remote(it
, &errmsg
);
626 error
= deliver_local(it
, &errmsg
);
631 syslog(LOG_INFO
, "%s: delivery successful",
636 if (stat(it
->queuefn
, &st
) != 0) {
637 syslog(LOG_ERR
, "%s: lost queue file `%s'",
638 it
->queueid
, it
->queuefn
);
641 if (gettimeofday(&now
, NULL
) == 0 &&
642 (now
.tv_sec
- st
.st_mtimespec
.tv_sec
> MAX_TIMEOUT
)) {
646 "Could not deliver for the last %d seconds. Giving up.",
653 if (backoff
> MAX_RETRY
)
668 load_queue(struct queue
*queue
)
672 //struct queue queue, itmqueue;
673 struct queue itmqueue
;
686 LIST_INIT(&queue
->queue
);
688 spooldir
= opendir(config
->spooldir
);
689 if (spooldir
== NULL
)
690 err(1, "reading queue");
692 while ((de
= readdir(spooldir
)) != NULL
) {
698 LIST_INIT(&itmqueue
.queue
);
700 /* ignore temp files */
701 if (strncmp(de
->d_name
, "tmp_", 4) == 0 ||
702 de
->d_type
!= DT_REG
)
704 if (asprintf(&queuefn
, "%s/%s", config
->spooldir
, de
->d_name
) < 0)
706 fd
= open(queuefn
, O_RDONLY
|O_EXLOCK
|O_NONBLOCK
);
708 /* Ignore locked files */
709 if (errno
== EWOULDBLOCK
)
714 queuef
= fdopen(fd
, "r");
717 if (fgets(line
, sizeof(line
), queuef
) == NULL
||
720 line
[strlen(line
) - 1] = 0; /* chop newline */
721 sender
= strdup(line
);
726 if (fgets(line
, sizeof(line
), queuef
) == NULL
||
731 line
[strlen(line
) - 1] = 0;
732 queueid
= strdup(line
);
735 addr
= strchr(queueid
, ' ');
741 if (asprintf(&fn
, "%s/%s", config
->spooldir
, queueid
) < 0)
743 /* Item has already been delivered? */
744 if (stat(fn
, &st
) != 0)
746 if (add_recp(&itmqueue
, addr
, sender
, 0) != 0)
748 it
= LIST_FIRST(&itmqueue
.queue
);
750 it
->queueid
= queueid
;
754 if (LIST_EMPTY(&itmqueue
.queue
)) {
755 warnx("queue file without items: `%s'", queuefn
);
758 hdrlen
= ftell(queuef
);
759 while ((it
= LIST_FIRST(&itmqueue
.queue
)) != NULL
) {
761 LIST_REMOVE(it
, next
);
762 LIST_INSERT_HEAD(&queue
->queue
, it
, next
);
767 warn("reading queue: `%s'", queuefn
);
783 err(1, "reading queue");
787 run_queue(struct queue
*queue
)
791 if (LIST_EMPTY(&queue
->queue
))
794 it
= go_background(queue
);
800 show_queue(struct queue
*queue
)
804 if (LIST_EMPTY(&queue
->queue
)) {
805 printf("Mail queue is empty\n");
809 LIST_FOREACH(it
, &queue
->queue
, next
) {
813 To\t: %s\n--\n", it
->queueid
, it
->sender
, it
->addr
);
821 * - use group permissions
822 * - proper sysexit codes
826 main(int argc
, char **argv
)
834 int nodot
= 0, doqueue
= 0, showq
= 0;
837 LIST_INIT(&queue
.queue
);
838 snprintf(tag
, 254, "dma");
841 while ((ch
= getopt(argc
, argv
, "A:b:Df:iL:o:O:q:r:")) != -1) {
844 /* -AX is being ignored, except for -A{c,m} */
845 if (optarg
[0] == 'c' || optarg
[0] == 'm') {
848 /* else FALLTRHOUGH */
850 /* -bX is being ignored, except for -bp */
851 if (optarg
[0] == 'p') {
855 /* else FALLTRHOUGH */
861 snprintf(tag
, 254, "%s", optarg
);
869 /* -oX is being ignored, except for -oi */
870 if (optarg
[0] != 'i')
872 /* else FALLTRHOUGH */
891 openlog(tag
, LOG_PID
| LOG_PERROR
, LOG_MAIL
);
893 config
= malloc(sizeof(struct config
));
895 errx(1, "Cannot allocate enough memory");
897 memset(config
, 0, sizeof(struct config
));
898 if (parse_conf(CONF_PATH
, config
) < 0) {
900 errx(1, "reading config file");
903 if (config
->features
& VIRTUAL
)
904 if (parse_virtuser(config
->virtualpath
) < 0)
905 errx(1, "error reading virtual user file: %s",
906 config
->virtualpath
);
908 if (parse_authfile(config
->authpath
) < 0)
909 err(1, "reading SMTP authentication file");
913 errx(1, "sending mail and displaying queue is"
914 " mutually exclusive");
922 errx(1, "sending mail and queue pickup is mutually exclusive");
928 if (read_aliases() != 0)
929 err(1, "reading aliases");
931 if ((sender
= set_from(sender
)) == NULL
)
932 err(1, "setting from address");
934 for (i
= 0; i
< argc
; i
++) {
935 if (add_recp(&queue
, argv
[i
], sender
, 1) != 0)
936 errx(1, "invalid recipient `%s'\n", argv
[i
]);
939 if (LIST_EMPTY(&queue
.queue
))
940 errx(1, "no recipients");
942 if (gentempf(&queue
) != 0)
943 err(1, "create temp file");
945 if (preparespool(&queue
, sender
) != 0)
946 err(1, "creating spools (1)");
948 if (readmail(&queue
, sender
, nodot
) != 0)
949 err(1, "reading mail");
951 if (linkspool(&queue
) != 0)
952 err(1, "creating spools (2)");
954 /* From here on the mail is safe. */
956 if (config
->features
& DEFER
)
959 it
= go_background(&queue
);