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git.ipfire.org Git - people/ms/dma.git/blob - dma-mbox-create.c
2 * Copyright (c) 2010 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 'corecode' Schubert <corecode@fs.ei.tum.de>.
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>
54 * Create a mbox in /var/mail for a given user, or make sure
55 * the permissions are correct for dma.
59 main(int argc
, char **argv
)
71 * We take exactly one argument: the username.
77 /* the username may not contain a pathname separator */
78 if (strchr(user
, '/'))
81 /* verify the user exists */
86 user_uid
= pw
->pw_uid
;
88 gr
= getgrnam(DMA_GROUP
);
92 mail_gid
= gr
->gr_gid
;
94 if (setgid(mail_gid
) != 0)
96 if (getegid() != mail_gid
)
99 error
= snprintf(fn
, sizeof(fn
), "%s/%s", _PATH_MAILDIR
, user
);
100 if (error
< 0 || (size_t)error
>= sizeof(fn
))
103 f
= open(fn
, O_RDONLY
|O_CREAT
, 0600);
107 if (fchown(f
, user_uid
, mail_gid
))
113 /* file should be present with the right owner and permissions */