Merge from vendor branch BZIP:
[dragonfly.git] / lib / libc / gen / getpeereid.c
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1/*
2 * Copyright (c) 2001 Dima Dorfman.
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
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25 *
26 * $FreeBSD: src/lib/libc/gen/getpeereid.c,v 1.4.2.2 2002/12/23 10:25:36 maxim Exp $
27 * $DragonFly: src/lib/libc/gen/getpeereid.c,v 1.2 2003/06/17 04:26:42 dillon Exp $
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28 */
29
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30#include <sys/param.h>
31#include <sys/socket.h>
32#include <sys/ucred.h>
33#include <sys/un.h>
34
35#include <errno.h>
36#include <unistd.h>
37
38int
39getpeereid(int s, uid_t *euid, gid_t *egid)
40{
41 struct xucred xuc;
42 socklen_t xuclen;
43 int error;
44
45 xuclen = sizeof(xuc);
46 error = getsockopt(s, 0, LOCAL_PEERCRED, &xuc, &xuclen);
47 if (error != 0)
48 return (error);
49 if (xuc.cr_version != XUCRED_VERSION)
50 return (EINVAL);
51 *euid = xuc.cr_uid;
52 *egid = xuc.cr_gid;
53 return (0);
54}