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
35 #include <sys/types.h>
52 create_mbox(const char *name)
54 struct sigaction sa, osa;
55 pid_t child, waitchild;
63 * We need to enable SIGCHLD temporarily so that waitpid works.
65 bzero(&sa, sizeof(sa));
66 sa.sa_handler = SIG_DFL;
67 sigaction(SIGCHLD, &sa, &osa);
75 maxfd = sysconf(_SC_OPEN_MAX);
77 maxfd = 1024; /* what can we do... */
79 for (i = 3; i <= maxfd; ++i)
82 execl(LIBEXEC_PATH "/dma-mbox-create", "dma-mbox-create", name, NULL);
83 syslog(LOG_ERR, "cannot execute "LIBEXEC_PATH"/dma-mbox-create: %m");
88 waitchild = waitpid(child, &status, 0);
94 if (waitchild == -1 && e == EINTR) {
95 syslog(LOG_ERR, "hung child while creating mbox `%s': %m", name);
99 if (waitchild == -1) {
100 syslog(LOG_ERR, "child disappeared while creating mbox `%s': %m", name);
104 if (!WIFEXITED(status) || WEXITSTATUS(status) != 0) {
105 syslog(LOG_ERR, "error creating mbox `%s'", name);
115 syslog(LOG_ERR, "error creating mbox");
119 sigaction(SIGCHLD, &osa, NULL);
125 deliver_local(struct qitem *it)
130 const char *newline = "\n";
137 time_t now = time(NULL);
139 error = snprintf(fn, sizeof(fn), "%s/%s", _PATH_MAILDIR, it->addr);
140 if (error < 0 || (size_t)error >= sizeof(fn)) {
141 syslog(LOG_NOTICE, "local delivery deferred: %m");
146 /* wait for a maximum of 100s to get the lock to the file */
149 /* don't use O_CREAT here, because we might be running as the wrong user. */
150 mbox = open_locked(fn, O_WRONLY|O_APPEND);
160 * The file does not exist or we can't access it.
161 * Call dma-mbox-create to create it and fix permissions.
163 if (tries > 0 || create_mbox(it->addr) != 0) {
164 syslog(LOG_ERR, "local delivery deferred: can not create `%s'", fn);
171 syslog(LOG_NOTICE, "local delivery deferred: can not lock `%s'", fn);
175 syslog(LOG_NOTICE, "local delivery deferred: can not open `%s': %m", fn);
182 mboxlen = lseek(mbox, 0, SEEK_END);
184 /* New mails start with \nFrom ...., unless we're at the beginning of the mbox */
188 /* If we're bouncing a message, claim it comes from MAILER-DAEMON */
190 if (strcmp(sender, "") == 0)
191 sender = "MAILER-DAEMON";
193 if (fseek(it->mailf, 0, SEEK_SET) != 0) {
194 syslog(LOG_NOTICE, "local delivery deferred: can not seek: %m");
198 error = snprintf(line, sizeof(line), "%sFrom %s\t%s", newline, sender, ctime(&now));
199 if (error < 0 || (size_t)error >= sizeof(line)) {
200 syslog(LOG_NOTICE, "local delivery deferred: can not write header: %m");
203 if (write(mbox, line, error) != error)
206 while (!feof(it->mailf)) {
207 if (fgets(line, sizeof(line), it->mailf) == NULL)
209 linelen = strlen(line);
210 if (linelen == 0 || line[linelen - 1] != '\n') {
211 syslog(LOG_CRIT, "local delivery failed: corrupted queue file");
212 snprintf(errmsg, sizeof(errmsg), "corrupted queue file");
219 * - escape lines that start with "From " with a > sign.
220 * - be reversable by escaping lines that contain an arbitrary
221 * number of > signs, followed by "From ", i.e. />*From / in regexp.
222 * - strict mbox processing only requires escaping after empty lines,
223 * yet most MUAs seem to relax this requirement and will treat any
224 * line starting with "From " as the beginning of a new mail.
226 if ((!MBOX_STRICT || hadnl) &&
227 strncmp(&line[strspn(line, ">")], "From ", 5) == 0) {
228 const char *gt = ">";
230 if (write(mbox, gt, 1) != 1)
233 } else if (strcmp(line, "\n") == 0) {
238 if ((size_t)write(mbox, line, linelen) != linelen)
245 syslog(LOG_ERR, "local delivery failed: write error: %m");
248 if (ftruncate(mbox, mboxlen) != 0)
249 syslog(LOG_WARNING, "error recovering mbox `%s': %m", fn);