1 /*
2 * Copyright (c) International Business Machines Corp., 2001
3 * Ported by Wayne Boyer
4 *
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; either version 2 of the License, or
8 * (at your option) any later version.
9 *
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
13 * the GNU General Public License for more details.
14 *
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
18 */
19
20 /*
21 * Testcase to ensure that the setgid() system call sets errno to EPERM
22 *
23 * ALGORITHM
24 * Call setgid() to set the gid to that of root. Run this test as
25 * ltpuser1, and expect to get EPERM
26 */
27 #include <pwd.h>
28 #include <errno.h>
29
30 #include "test.h"
31 #include "compat_16.h"
32
33 TCID_DEFINE(setgid02);
34 int TST_TOTAL = 1;
35
36 static char root[] = "root";
37 static char nobody_uid[] = "nobody";
38 static char nobody_gid[] = "nobody";
39 static struct passwd *ltpuser;
40
41 static void setup(void);
42 static void cleanup(void);
43
main(int ac,char ** av)44 int main(int ac, char **av)
45 {
46 struct passwd *getpwnam(), *rootpwent;
47 int lc;
48
49 tst_parse_opts(ac, av, NULL, NULL);
50
51 setup();
52
53 for (lc = 0; TEST_LOOPING(lc); lc++) {
54 tst_count = 0;
55
56 if ((rootpwent = getpwnam(root)) == NULL) {
57 tst_brkm(TBROK, cleanup, "getpwnam failed for user id "
58 "%s", root);
59 }
60
61 GID16_CHECK(rootpwent->pw_gid, setgid, cleanup);
62
63 TEST(SETGID(cleanup, rootpwent->pw_gid));
64
65 if (TEST_RETURN != -1) {
66 tst_resm(TFAIL, "call succeeded unexpectedly");
67 continue;
68 }
69
70 if (TEST_ERRNO != EPERM) {
71 tst_resm(TFAIL, "setgid set invalid errno, expected: "
72 "EPERM, got: %d\n", TEST_ERRNO);
73 } else {
74 tst_resm(TPASS, "setgid returned EPERM");
75 }
76 }
77
78 cleanup();
79 tst_exit();
80 }
81
setup(void)82 static void setup(void)
83 {
84 tst_require_root();
85
86 /* Switch to nobody user for correct error code collection */
87 ltpuser = getpwnam(nobody_uid);
88 if (ltpuser == NULL)
89 tst_brkm(TBROK, cleanup, "getpwnam failed for user id %s",
90 nobody_uid);
91
92 if (setgid(ltpuser->pw_gid) == -1) {
93 tst_resm(TINFO, "setgid failed to "
94 "to set the effective gid to %d", ltpuser->pw_gid);
95 perror("setgid");
96 }
97
98 if (setuid(ltpuser->pw_uid) == -1) {
99 tst_resm(TINFO, "setuid failed to "
100 "to set the effective uid to %d", ltpuser->pw_uid);
101 perror("setuid");
102 }
103
104 tst_sig(NOFORK, DEF_HANDLER, cleanup);
105
106 TEST_PAUSE;
107 }
108
cleanup(void)109 static void cleanup(void)
110 {
111 }
112