1/* $NetBSD: t_getgroups.c,v 1.1 2011/04/17 06:26:02 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_getgroups.c,v 1.1 2011/04/17 06:26:02 jruoho Exp $");
33
34#include <sys/wait.h>
35
36#include <atf-c.h>
37#include <errno.h>
38#include <limits.h>
39#include <stdlib.h>
40#include <string.h>
41#include <unistd.h>
42
43ATF_TC(getgroups_err);
44ATF_TC_HEAD(getgroups_err, tc)
45{
46	atf_tc_set_md_var(tc, "descr", "Test errors in getgroups(2)");
47}
48
49ATF_TC_BODY(getgroups_err, tc)
50{
51	gid_t gidset[NGROUPS_MAX];
52
53	errno = 0;
54
55	ATF_REQUIRE(getgroups(10, (gid_t *)-1) == -1);
56	ATF_REQUIRE(errno == EFAULT);
57
58	errno = 0;
59
60	ATF_REQUIRE(getgroups(-1, gidset) == -1);
61	ATF_REQUIRE(errno == EINVAL);
62}
63
64ATF_TC(getgroups_getgid);
65ATF_TC_HEAD(getgroups_getgid, tc)
66{
67	atf_tc_set_md_var(tc, "descr", "Test getgid(2) from getgroups(2)");
68}
69
70ATF_TC_BODY(getgroups_getgid, tc)
71{
72	gid_t gidset[NGROUPS_MAX];
73	gid_t gid = getgid();
74	int i, n;
75
76	/*
77	 * Check that getgid(2) is found from
78	 * the GIDs returned by getgroups(2).
79	 */
80	n = getgroups(NGROUPS_MAX, gidset);
81
82	for (i = 0; i < n; i++) {
83
84		if (gidset[i] == gid)
85			return;
86	}
87
88	atf_tc_fail("getgid(2) not found from getgroups(2)");
89}
90
91ATF_TC(getgroups_setgid);
92ATF_TC_HEAD(getgroups_setgid, tc)
93{
94	atf_tc_set_md_var(tc, "descr", "Test setgid(2) from getgroups(2)");
95	atf_tc_set_md_var(tc, "require.user", "root");
96}
97
98ATF_TC_BODY(getgroups_setgid, tc)
99{
100	gid_t gidset[NGROUPS_MAX];
101	int i, n, rv, sta;
102	pid_t pid;
103
104	/*
105	 * Check that we can setgid(2)
106	 * to the returned group IDs.
107	 */
108	n = getgroups(NGROUPS_MAX, gidset);
109	ATF_REQUIRE(n >= 0);
110
111	for (i = 0; i < n; i++) {
112
113		pid = fork();
114		ATF_REQUIRE(pid >= 0);
115
116		if (pid == 0) {
117
118			rv = setgid(gidset[i]);
119
120			if (rv != 0)
121				_exit(EXIT_FAILURE);
122
123			_exit(EXIT_SUCCESS);
124		}
125
126		(void)wait(&sta);
127
128		if (WIFEXITED(sta) == 0 || WEXITSTATUS(sta) != EXIT_SUCCESS)
129			atf_tc_fail("getgroups(2) is inconsistent");
130	}
131}
132
133ATF_TC(getgroups_zero);
134ATF_TC_HEAD(getgroups_zero, tc)
135{
136	atf_tc_set_md_var(tc, "descr", "Test getgroups(2) with zero param");
137}
138
139ATF_TC_BODY(getgroups_zero, tc)
140{
141	const gid_t val = 123456789;
142	gid_t gidset[NGROUPS_MAX];
143	size_t i;
144
145	/*
146	 * If the first parameter is zero, the number
147	 * of groups should be returned but the supplied
148	 * buffer should remain intact.
149	 */
150	for (i = 0; i < __arraycount(gidset); i++)
151		gidset[i] = val;
152
153	ATF_REQUIRE(getgroups(0, gidset) >= 0);
154
155	for (i = 0; i < __arraycount(gidset); i++) {
156
157		if (gidset[i] != val)
158			atf_tc_fail("getgroups(2) modified the buffer");
159	}
160}
161
162ATF_TP_ADD_TCS(tp)
163{
164
165	ATF_TP_ADD_TC(tp, getgroups_err);
166	ATF_TP_ADD_TC(tp, getgroups_getgid);
167	ATF_TP_ADD_TC(tp, getgroups_setgid);
168	ATF_TP_ADD_TC(tp, getgroups_zero);
169
170	return atf_no_error();
171}
172