1 /*
2 * Copyright (c) International Business Machines Corp., 2001
3 *
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation; either version 2 of the License, or
7 * (at your option) any later version.
8 *
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
12 * the GNU General Public License for more details.
13 *
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software
16 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
17 *
18 * Ported by John George
19 */
20
21 /*
22 * Test setregid() when executed by root.
23 */
24
25 #include <errno.h>
26 #include <pwd.h>
27 #include <grp.h>
28 #include <stdlib.h>
29 #include <string.h>
30
31 #include "test.h"
32 #include "compat_16.h"
33
34 TCID_DEFINE(setregid04);
35
36 static gid_t neg_one = -1;
37
38 static struct group users_gr, daemon_gr, root_gr, bin_gr;
39
40 /*
41 * The following structure contains all test data. Each structure in the array
42 * is used for a separate test. The tests are executed in the for loop below.
43 */
44
45 struct test_data_t {
46 gid_t *real_gid;
47 gid_t *eff_gid;
48 struct group *exp_real_usr;
49 struct group *exp_eff_usr;
50 const char *test_msg;
51 } test_data[] = {
52 {
53 &root_gr.gr_gid, &root_gr.gr_gid, &root_gr, &root_gr,
54 "After setregid(root, root),"}, {
55 &users_gr.gr_gid, &neg_one, &users_gr, &root_gr,
56 "After setregid(users, -1)"}, {
57 &root_gr.gr_gid, &neg_one, &root_gr, &root_gr,
58 "After setregid(root,-1),"}, {
59 &neg_one, &neg_one, &root_gr, &root_gr,
60 "After setregid(-1, -1),"}, {
61 &neg_one, &root_gr.gr_gid, &root_gr, &root_gr,
62 "After setregid(-1, root)"}, {
63 &root_gr.gr_gid, &neg_one, &root_gr, &root_gr,
64 "After setregid(root, -1),"}, {
65 &daemon_gr.gr_gid, &users_gr.gr_gid, &daemon_gr, &users_gr,
66 "After setregid(daemon, users)"}, {
67 &neg_one, &neg_one, &daemon_gr, &users_gr,
68 "After setregid(-1, -1)"}, {
69 &neg_one, &users_gr.gr_gid, &daemon_gr, &users_gr,
70 "After setregid(-1, users)"}
71 };
72
73 int TST_TOTAL = sizeof(test_data) / sizeof(test_data[0]);
74
75 static void setup(void);
76 static void cleanup(void);
77 static void gid_verify(struct group *ru, struct group *eu, const char *when);
78
main(int ac,char ** av)79 int main(int ac, char **av)
80 {
81 int lc;
82
83 tst_parse_opts(ac, av, NULL, NULL);
84
85 setup();
86
87 for (lc = 0; TEST_LOOPING(lc); lc++) {
88 int i;
89
90 tst_count = 0;
91
92 for (i = 0; i < TST_TOTAL; i++) {
93 /* Set the real or effective group id */
94 TEST(SETREGID(cleanup, *test_data[i].real_gid,
95 *test_data[i].eff_gid));
96
97 if (TEST_RETURN == -1) {
98 tst_resm(TBROK, "setregid(%d, %d) failed",
99 *test_data[i].real_gid,
100 *test_data[i].eff_gid);
101 } else {
102 gid_verify(test_data[i].exp_real_usr,
103 test_data[i].exp_eff_usr,
104 test_data[i].test_msg);
105 }
106 }
107 }
108
109 cleanup();
110 tst_exit();
111 }
112
113 #define SAFE_GETGROUP(GROUPNAME) \
114 if (getgrnam(#GROUPNAME) == NULL) { \
115 tst_brkm(TBROK, NULL, "Couldn't find the `" #GROUPNAME "' group"); \
116 } \
117 GROUPNAME ## _gr = *(getgrnam(#GROUPNAME));
118
setup(void)119 static void setup(void)
120 {
121 tst_require_root();
122
123 tst_sig(FORK, DEF_HANDLER, cleanup);
124
125 SAFE_GETGROUP(root);
126 SAFE_GETGROUP(users);
127 SAFE_GETGROUP(daemon);
128 SAFE_GETGROUP(bin);
129
130 TEST_PAUSE;
131 }
132
cleanup(void)133 static void cleanup(void)
134 {
135 }
136
gid_verify(struct group * rg,struct group * eg,const char * when)137 static void gid_verify(struct group *rg, struct group *eg, const char *when)
138 {
139 if ((getgid() != rg->gr_gid) || (getegid() != eg->gr_gid)) {
140 tst_resm(TFAIL, "ERROR: %s real gid = %d; effective gid = %d",
141 when, getgid(), getegid());
142 tst_resm(TINFO, "Expected: real gid = %d; effective gid = %d",
143 rg->gr_gid, eg->gr_gid);
144 } else {
145 tst_resm(TPASS, "real or effective gid was modified as "
146 "expected");
147 }
148 }
149