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
42 static bool check(int (*fuid)(uid_t), int (*fgid)(gid_t));
43
44 static bool
check(int (* fuid)(uid_t),int (* fgid)(gid_t))45 check(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
83 ATF_TC(issetugid_egid);
ATF_TC_HEAD(issetugid_egid,tc)84 ATF_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
ATF_TC_BODY(issetugid_egid,tc)90 ATF_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
97 ATF_TC(issetugid_euid);
ATF_TC_HEAD(issetugid_euid,tc)98 ATF_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
ATF_TC_BODY(issetugid_euid,tc)104 ATF_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
111 ATF_TC(issetugid_rgid);
ATF_TC_HEAD(issetugid_rgid,tc)112 ATF_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
ATF_TC_BODY(issetugid_rgid,tc)118 ATF_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
125 ATF_TC(issetugid_ruid);
ATF_TC_HEAD(issetugid_ruid,tc)126 ATF_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
ATF_TC_BODY(issetugid_ruid,tc)132 ATF_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
ATF_TP_ADD_TCS(tp)139 ATF_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