1/* $NetBSD: t_issetugid.c,v 1.1 2011/07/07 06:57:53 jruoho Exp $ */
2
3/*-
4 * Copyright (c) 2011 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by Jukka Ruohonen.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 *    notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 *    notice, this list of conditions and the following disclaimer in the
17 *    documentation and/or other materials provided with the distribution.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
29 * POSSIBILITY OF SUCH DAMAGE.
30 */
31#include <sys/cdefs.h>
32__RCSID("$NetBSD: t_issetugid.c,v 1.1 2011/07/07 06:57:53 jruoho Exp $");
33
34#include <sys/wait.h>
35
36#include <atf-c.h>
37#include <errno.h>
38#include <pwd.h>
39#include <stdlib.h>
40#include <unistd.h>
41
42static bool check(int (*fuid)(uid_t), int (*fgid)(gid_t));
43
44static bool
45check(int (*fuid)(uid_t), int (*fgid)(gid_t))
46{
47	struct passwd *pw;
48	pid_t pid;
49	int sta;
50
51	pw = getpwnam("nobody");
52
53	if (pw == NULL)
54		return false;
55
56	pid = fork();
57
58	if (pid < 0)
59		return false;
60
61	if (pid == 0) {
62
63		if (fuid != NULL && (*fuid)(pw->pw_uid) != 0)
64			_exit(EXIT_FAILURE);
65
66		if (fgid != NULL && (*fgid)(pw->pw_gid) != 0)
67			_exit(EXIT_FAILURE);
68
69		if (issetugid() != 1)
70			_exit(EXIT_FAILURE);
71
72		_exit(EXIT_SUCCESS);
73	}
74
75	(void)wait(&sta);
76
77	if (WIFEXITED(sta) == 0 || WEXITSTATUS(sta) != EXIT_SUCCESS)
78		return false;
79
80	return true;
81}
82
83ATF_TC(issetugid_egid);
84ATF_TC_HEAD(issetugid_egid, tc)
85{
86	atf_tc_set_md_var(tc, "descr", "A test of issetugid(2), eff. GID");
87	atf_tc_set_md_var(tc, "require.user", "root");
88}
89
90ATF_TC_BODY(issetugid_egid, tc)
91{
92
93	if (check(NULL, setegid) != true)
94		atf_tc_fail("issetugid(2) failed with effective GID");
95}
96
97ATF_TC(issetugid_euid);
98ATF_TC_HEAD(issetugid_euid, tc)
99{
100	atf_tc_set_md_var(tc, "descr", "A test of issetugid(2), eff. UID");
101	atf_tc_set_md_var(tc, "require.user", "root");
102}
103
104ATF_TC_BODY(issetugid_euid, tc)
105{
106
107	if (check(seteuid, NULL) != true)
108		atf_tc_fail("issetugid(2) failed with effective UID");
109}
110
111ATF_TC(issetugid_rgid);
112ATF_TC_HEAD(issetugid_rgid, tc)
113{
114	atf_tc_set_md_var(tc, "descr", "A test of issetugid(2), real GID");
115	atf_tc_set_md_var(tc, "require.user", "root");
116}
117
118ATF_TC_BODY(issetugid_rgid, tc)
119{
120
121	if (check(NULL, setgid) != true)
122		atf_tc_fail("issetugid(2) failed with real GID");
123}
124
125ATF_TC(issetugid_ruid);
126ATF_TC_HEAD(issetugid_ruid, tc)
127{
128	atf_tc_set_md_var(tc, "descr", "A test of issetugid(2), real UID");
129	atf_tc_set_md_var(tc, "require.user", "root");
130}
131
132ATF_TC_BODY(issetugid_ruid, tc)
133{
134
135	if (check(setuid, NULL) != true)
136		atf_tc_fail("issetugid(2) failed with real UID");
137}
138
139ATF_TP_ADD_TCS(tp)
140{
141
142	ATF_TP_ADD_TC(tp, issetugid_egid);
143	ATF_TP_ADD_TC(tp, issetugid_euid);
144	ATF_TP_ADD_TC(tp, issetugid_rgid);
145	ATF_TP_ADD_TC(tp, issetugid_ruid);
146
147	return atf_no_error();
148}
149