1 /* $OpenBSD: mda_mbox.c,v 1.3 2021/06/14 17:58:15 eric Exp $ */
2
3 /*
4 * Copyright (c) 2018 Gilles Chehade <gilles@poolp.org>
5 *
6 * Permission to use, copy, modify, and distribute this software for any
7 * purpose with or without fee is hereby granted, provided that the above
8 * copyright notice and this permission notice appear in all copies.
9 *
10 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
11 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
12 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
13 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
14 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
15 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
16 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
17 */
18
19 #include <sys/stat.h>
20
21 #include <err.h>
22 #include <errno.h>
23 #include <fcntl.h>
24 #include <paths.h>
25 #include <unistd.h>
26
27 #include "smtpd.h"
28
29 void
mda_mbox(struct deliver * deliver)30 mda_mbox(struct deliver *deliver)
31 {
32 int ret;
33 char sender[LINE_MAX];
34 char *envp[] = {
35 "HOME=/",
36 "PATH=" _PATH_DEFPATH,
37 "LOGNAME=root",
38 "USER=root",
39 NULL,
40 };
41
42 if (deliver->sender.user[0] == '\0' &&
43 deliver->sender.domain[0] == '\0')
44 ret = snprintf(sender, sizeof sender, "MAILER-DAEMON");
45 else
46 ret = snprintf(sender, sizeof sender, "%s@%s",
47 deliver->sender.user, deliver->sender.domain);
48 if (ret < 0 || (size_t)ret >= sizeof sender)
49 errx(EX_TEMPFAIL, "sender address too long");
50
51 execle(PATH_MAILLOCAL, PATH_MAILLOCAL, "-f",
52 sender, deliver->userinfo.username, (char *)NULL, envp);
53 perror("execl");
54 _exit(EX_TEMPFAIL);
55 }
56
57 void
mda_mbox_init(struct deliver * deliver)58 mda_mbox_init(struct deliver *deliver)
59 {
60 int fd;
61 int ret;
62 char buffer[LINE_MAX];
63
64 ret = snprintf(buffer, sizeof buffer, "%s/%s",
65 _PATH_MAILDIR, deliver->userinfo.username);
66 if (ret < 0 || (size_t)ret >= sizeof buffer)
67 errx(EX_TEMPFAIL, "mailbox pathname too long");
68
69 if ((fd = open(buffer, O_CREAT|O_EXCL, 0)) == -1) {
70 if (errno == EEXIST)
71 return;
72 err(EX_TEMPFAIL, "open");
73 }
74
75 if (fchown(fd, deliver->userinfo.uid, deliver->userinfo.gid) == -1)
76 err(EX_TEMPFAIL, "fchown");
77
78 if (fchmod(fd, S_IRUSR|S_IWUSR) == -1)
79 err(EX_TEMPFAIL, "fchown");
80 }
81