xref: /openbsd-src/regress/lib/libc/sys/t_getgroups.c (revision 46035553bfdd96e63c94e32da0210227ec2e3cf1)
1 /*	$OpenBSD: t_getgroups.c,v 1.2 2020/11/09 23:18:51 bluhm Exp $	*/
2 /* $NetBSD: t_getgroups.c,v 1.1 2011/07/07 06:57:53 jruoho Exp $ */
3 
4 /*-
5  * Copyright (c) 2011 The NetBSD Foundation, Inc.
6  * All rights reserved.
7  *
8  * This code is derived from software contributed to The NetBSD Foundation
9  * by Jukka Ruohonen.
10  *
11  * Redistribution and use in source and binary forms, with or without
12  * modification, are permitted provided that the following conditions
13  * are met:
14  * 1. Redistributions of source code must retain the above copyright
15  *    notice, this list of conditions and the following disclaimer.
16  * 2. Redistributions in binary form must reproduce the above copyright
17  *    notice, this list of conditions and the following disclaimer in the
18  *    documentation and/or other materials provided with the distribution.
19  *
20  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
21  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
22  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
23  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
24  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
25  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
26  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
27  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
28  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
29  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
30  * POSSIBILITY OF SUCH DAMAGE.
31  */
32 
33 #include "macros.h"
34 
35 #include <sys/cdefs.h>
36 __RCSID("$NetBSD: t_getgroups.c,v 1.1 2011/07/07 06:57:53 jruoho Exp $");
37 
38 #include <sys/wait.h>
39 
40 #include "atf-c.h"
41 #include <errno.h>
42 #include <limits.h>
43 #include <stdlib.h>
44 #include <string.h>
45 #include <unistd.h>
46 
47 ATF_TC(getgroups_err);
48 ATF_TC_HEAD(getgroups_err, tc)
49 {
50 	atf_tc_set_md_var(tc, "descr", "Test errors in getgroups(2)");
51 }
52 
53 ATF_TC_BODY(getgroups_err, tc)
54 {
55 	gid_t gidset[NGROUPS_MAX];
56 
57 	errno = 0;
58 
59 #if __OpenBSD__
60 	ATF_REQUIRE(getgroups(NGROUPS_MAX, (gid_t *)-1) == -1);
61 #else
62 	ATF_REQUIRE(getgroups(10, (gid_t *)-1) == -1);
63 #endif
64 	ATF_REQUIRE(errno == EFAULT);
65 
66 	errno = 0;
67 
68 	ATF_REQUIRE(getgroups(-1, gidset) == -1);
69 	ATF_REQUIRE(errno == EINVAL);
70 }
71 
72 ATF_TC(getgroups_getgid);
73 ATF_TC_HEAD(getgroups_getgid, tc)
74 {
75 	atf_tc_set_md_var(tc, "descr", "Test getgid(2) from getgroups(2)");
76 }
77 
78 ATF_TC_BODY(getgroups_getgid, tc)
79 {
80 	gid_t gidset[NGROUPS_MAX];
81 	gid_t gid = getgid();
82 	int i, n;
83 
84 	/*
85 	 * Check that getgid(2) is found from
86 	 * the GIDs returned by getgroups(2).
87 	 */
88 	n = getgroups(NGROUPS_MAX, gidset);
89 
90 	for (i = 0; i < n; i++) {
91 
92 		if (gidset[i] == gid)
93 			return;
94 	}
95 
96 	atf_tc_fail("getgid(2) not found from getgroups(2)");
97 }
98 
99 ATF_TC(getgroups_setgid);
100 ATF_TC_HEAD(getgroups_setgid, tc)
101 {
102 	atf_tc_set_md_var(tc, "descr", "Test setgid(2) from getgroups(2)");
103 	atf_tc_set_md_var(tc, "require.user", "root");
104 }
105 
106 ATF_TC_BODY(getgroups_setgid, tc)
107 {
108 	gid_t gidset[NGROUPS_MAX];
109 	int i, n, rv, sta;
110 	pid_t pid;
111 
112 	/*
113 	 * Check that we can setgid(2)
114 	 * to the returned group IDs.
115 	 */
116 	n = getgroups(NGROUPS_MAX, gidset);
117 	ATF_REQUIRE(n >= 0);
118 
119 	for (i = 0; i < n; i++) {
120 
121 		pid = fork();
122 		ATF_REQUIRE(pid >= 0);
123 
124 		if (pid == 0) {
125 
126 			rv = setgid(gidset[i]);
127 
128 			if (rv != 0)
129 				_exit(EXIT_FAILURE);
130 
131 			_exit(EXIT_SUCCESS);
132 		}
133 
134 		(void)wait(&sta);
135 
136 		if (WIFEXITED(sta) == 0 || WEXITSTATUS(sta) != EXIT_SUCCESS)
137 			atf_tc_fail("getgroups(2) is inconsistent");
138 	}
139 }
140 
141 ATF_TC(getgroups_zero);
142 ATF_TC_HEAD(getgroups_zero, tc)
143 {
144 	atf_tc_set_md_var(tc, "descr", "Test getgroups(2) with zero param");
145 }
146 
147 ATF_TC_BODY(getgroups_zero, tc)
148 {
149 	const gid_t val = 123456789;
150 	gid_t gidset[NGROUPS_MAX];
151 	size_t i;
152 
153 	/*
154 	 * If the first parameter is zero, the number
155 	 * of groups should be returned but the supplied
156 	 * buffer should remain intact.
157 	 */
158 	for (i = 0; i < __arraycount(gidset); i++)
159 		gidset[i] = val;
160 
161 	ATF_REQUIRE(getgroups(0, gidset) >= 0);
162 
163 	for (i = 0; i < __arraycount(gidset); i++) {
164 
165 		if (gidset[i] != val)
166 			atf_tc_fail("getgroups(2) modified the buffer");
167 	}
168 }
169 
170 ATF_TP_ADD_TCS(tp)
171 {
172 
173 	ATF_TP_ADD_TC(tp, getgroups_err);
174 	ATF_TP_ADD_TC(tp, getgroups_getgid);
175 	ATF_TP_ADD_TC(tp, getgroups_setgid);
176 	ATF_TP_ADD_TC(tp, getgroups_zero);
177 
178 	return atf_no_error();
179 }
180