2 * Copyright (c) 2010-2014, Simon Schubert <2@0x2c.org>.
3 * Copyright (c) 2008 The DragonFly Project. All rights reserved.
5 * This code is derived from software contributed to The DragonFly Project
6 * by Simon Schubert <2@0x2c.org>.
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in
16 * the documentation and/or other materials provided with the
18 * 3. Neither the name of The DragonFly Project nor the names of its
19 * contributors may be used to endorse or promote products derived
20 * from this software without specific, prior written permission.
22 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
23 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
24 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
25 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
26 * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
27 * INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING,
28 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
29 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
30 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
31 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
32 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
37 * This binary is setuid root. Use extreme caution when touching
38 * user-supplied information. Keep the root window as small as possible.
41 #include <sys/param.h>
57 logfail(const char *fmt, ...)
66 vsnprintf(outs, sizeof(outs), fmt, ap);
72 syslog(LOG_ERR, errno ? "%s: %m" : "%s", outs);
74 syslog(LOG_ERR, errno ? "%m" : "unknown error");
80 * Create a mbox in /var/mail for a given user, or make sure
81 * the permissions are correct for dma.
85 main(int argc, char **argv)
96 openlog("dma-mbox-create", 0, LOG_MAIL);
99 gr = getgrnam(DMA_GROUP);
101 logfail("cannot find dma group `%s'", DMA_GROUP);
103 mail_gid = gr->gr_gid;
105 if (setgid(mail_gid) != 0)
106 logfail("cannot set gid to %d (%s)", mail_gid, DMA_GROUP);
107 if (getegid() != mail_gid)
108 logfail("cannot set gid to %d (%s), still at %d", mail_gid, DMA_GROUP, getegid());
111 * We take exactly one argument: the username.
115 logfail("no arguments");
119 syslog(LOG_NOTICE, "creating mbox for `%s'", user);
121 /* the username may not contain a pathname separator */
122 if (strchr(user, '/')) {
124 logfail("path separator in username `%s'", user);
128 /* verify the user exists */
132 logfail("cannot find user `%s'", user);
134 user_uid = pw->pw_uid;
136 error = snprintf(fn, sizeof(fn), "%s/%s", _PATH_MAILDIR, user);
137 if (error < 0 || (size_t)error >= sizeof(fn)) {
140 logfail("mbox path too long");
142 logfail("cannot build mbox path for `%s/%s'", _PATH_MAILDIR, user);
145 f = open(fn, O_RDONLY|O_CREAT, 0600);
147 logfail("cannot open mbox `%s'", fn);
149 if (fchown(f, user_uid, mail_gid))
150 logfail("cannot change owner of mbox `%s'", fn);
153 logfail("cannot change permissions of mbox `%s'", fn);
155 /* file should be present with the right owner and permissions */
157 syslog(LOG_NOTICE, "successfully created mbox for `%s'", user);