1/*
2 * Copyright (c) 2022 Nicholas Marriott <nicholas.marriott@gmail.com>
3 *
4 * Permission to use, copy, modify, and distribute this software for any
5 * purpose with or without fee is hereby granted, provided that the above
6 * copyright notice and this permission notice appear in all copies.
7 *
8 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
9 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
10 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
11 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
12 * WHATSOEVER RESULTING FROM LOSS OF MIND, USE, DATA OR PROFITS, WHETHER
13 * IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
14 * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
15 */
16
17#include <sys/types.h>
18#include <sys/socket.h>
19
20#include <stdio.h>
21#include <unistd.h>
22
23#ifdef HAVE_UCRED_H
24#include <ucred.h>
25#endif
26
27#include "compat.h"
28
29int
30getpeereid(int s, uid_t *uid, gid_t *gid)
31{
32#ifdef HAVE_SO_PEERCRED
33	struct ucred	uc;
34	int		len = sizeof uc;
35
36	if (getsockopt(s, SOL_SOCKET, SO_PEERCRED, &uc, &len) == -1)
37		return (-1);
38	*uid = uc.uid;
39	*gid = uc.gid;
40	return (0);
41#elif defined(HAVE_GETPEERUCRED)
42        ucred_t *ucred = NULL;
43
44        if (getpeerucred(s, &ucred) == -1)
45                return (-1);
46        if ((*uid = ucred_geteuid(ucred)) == -1)
47                return (-1);
48        if ((*gid = ucred_getrgid(ucred)) == -1)
49                return (-1);
50        ucred_free(ucred);
51        return (0);
52#else
53	*uid = geteuid();
54	*gid = getegid();
55	return (0);
56#endif
57}
58