1 /* $OpenBSD: t_getgroups.c,v 1.3 2021/12/13 16:56:48 deraadt 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/wait.h>
36
37 #include "atf-c.h"
38 #include <errno.h>
39 #include <limits.h>
40 #include <stdlib.h>
41 #include <string.h>
42 #include <unistd.h>
43
44 ATF_TC(getgroups_err);
ATF_TC_HEAD(getgroups_err,tc)45 ATF_TC_HEAD(getgroups_err, tc)
46 {
47 atf_tc_set_md_var(tc, "descr", "Test errors in getgroups(2)");
48 }
49
ATF_TC_BODY(getgroups_err,tc)50 ATF_TC_BODY(getgroups_err, tc)
51 {
52 gid_t gidset[NGROUPS_MAX];
53
54 errno = 0;
55
56 #if __OpenBSD__
57 ATF_REQUIRE(getgroups(NGROUPS_MAX, (gid_t *)-1) == -1);
58 #else
59 ATF_REQUIRE(getgroups(10, (gid_t *)-1) == -1);
60 #endif
61 ATF_REQUIRE(errno == EFAULT);
62
63 errno = 0;
64
65 ATF_REQUIRE(getgroups(-1, gidset) == -1);
66 ATF_REQUIRE(errno == EINVAL);
67 }
68
69 ATF_TC(getgroups_getgid);
ATF_TC_HEAD(getgroups_getgid,tc)70 ATF_TC_HEAD(getgroups_getgid, tc)
71 {
72 atf_tc_set_md_var(tc, "descr", "Test getgid(2) from getgroups(2)");
73 }
74
ATF_TC_BODY(getgroups_getgid,tc)75 ATF_TC_BODY(getgroups_getgid, tc)
76 {
77 gid_t gidset[NGROUPS_MAX];
78 gid_t gid = getgid();
79 int i, n;
80
81 /*
82 * Check that getgid(2) is found from
83 * the GIDs returned by getgroups(2).
84 */
85 n = getgroups(NGROUPS_MAX, gidset);
86
87 for (i = 0; i < n; i++) {
88
89 if (gidset[i] == gid)
90 return;
91 }
92
93 atf_tc_fail("getgid(2) not found from getgroups(2)");
94 }
95
96 ATF_TC(getgroups_setgid);
ATF_TC_HEAD(getgroups_setgid,tc)97 ATF_TC_HEAD(getgroups_setgid, tc)
98 {
99 atf_tc_set_md_var(tc, "descr", "Test setgid(2) from getgroups(2)");
100 atf_tc_set_md_var(tc, "require.user", "root");
101 }
102
ATF_TC_BODY(getgroups_setgid,tc)103 ATF_TC_BODY(getgroups_setgid, tc)
104 {
105 gid_t gidset[NGROUPS_MAX];
106 int i, n, rv, sta;
107 pid_t pid;
108
109 /*
110 * Check that we can setgid(2)
111 * to the returned group IDs.
112 */
113 n = getgroups(NGROUPS_MAX, gidset);
114 ATF_REQUIRE(n >= 0);
115
116 for (i = 0; i < n; i++) {
117
118 pid = fork();
119 ATF_REQUIRE(pid >= 0);
120
121 if (pid == 0) {
122
123 rv = setgid(gidset[i]);
124
125 if (rv != 0)
126 _exit(EXIT_FAILURE);
127
128 _exit(EXIT_SUCCESS);
129 }
130
131 (void)wait(&sta);
132
133 if (WIFEXITED(sta) == 0 || WEXITSTATUS(sta) != EXIT_SUCCESS)
134 atf_tc_fail("getgroups(2) is inconsistent");
135 }
136 }
137
138 ATF_TC(getgroups_zero);
ATF_TC_HEAD(getgroups_zero,tc)139 ATF_TC_HEAD(getgroups_zero, tc)
140 {
141 atf_tc_set_md_var(tc, "descr", "Test getgroups(2) with zero param");
142 }
143
ATF_TC_BODY(getgroups_zero,tc)144 ATF_TC_BODY(getgroups_zero, tc)
145 {
146 const gid_t val = 123456789;
147 gid_t gidset[NGROUPS_MAX];
148 size_t i;
149
150 /*
151 * If the first parameter is zero, the number
152 * of groups should be returned but the supplied
153 * buffer should remain intact.
154 */
155 for (i = 0; i < __arraycount(gidset); i++)
156 gidset[i] = val;
157
158 ATF_REQUIRE(getgroups(0, gidset) >= 0);
159
160 for (i = 0; i < __arraycount(gidset); i++) {
161
162 if (gidset[i] != val)
163 atf_tc_fail("getgroups(2) modified the buffer");
164 }
165 }
166
ATF_TP_ADD_TCS(tp)167 ATF_TP_ADD_TCS(tp)
168 {
169
170 ATF_TP_ADD_TC(tp, getgroups_err);
171 ATF_TP_ADD_TC(tp, getgroups_getgid);
172 ATF_TP_ADD_TC(tp, getgroups_setgid);
173 ATF_TP_ADD_TC(tp, getgroups_zero);
174
175 return atf_no_error();
176 }
177