getpeereid.c revision 90039 
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.
25 */
26
27__FBSDID("$FreeBSD: head/lib/libc/gen/getpeereid.c 90039 2002-02-01 00:57:29Z obrien $");
28
29#include <sys/param.h>
30#include <sys/socket.h>
31#include <sys/ucred.h>
32#include <sys/un.h>
33
34#include <unistd.h>
35
36int
37getpeereid(int s, uid_t *euid, gid_t *egid)
38{
39	struct xucred xuc;
40	socklen_t xuclen;
41	int error;
42
43	xuclen = sizeof(xuc);
44	error = getsockopt(s, LOCAL_PEERCRED, 1, &xuc, &xuclen);
45	if (error != 0)
46		return (error);
47	*euid = xuc.cr_uid;
48	*egid = xuc.cr_gid;
49	return (0);
50}
51