1 /*
2 *
3 * Copyright (c) International Business Machines Corp., 2001
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 * NAME
22 * chroot01.c
23 *
24 * DESCRIPTION
25 * Testcase to check the whether chroot sets errno to EPERM.
26 *
27 * ALGORITHM
28 * As a non-root user attempt to perform chroot() to a directory. The
29 * chroot() call should fail with EPERM
30 *
31 * USAGE: <for command-line>
32 * chroot01 [-c n] [-e] [-i n] [-I x] [-P x] [-t]
33 * where, -c n : Run n copies concurrently.
34 * -e : Turn on errno logging.
35 * -i n : Execute test n times.
36 * -I x : Execute test for x seconds.
37 * -P x : Pause for x seconds between iterations.
38 * -t : Turn on syscall timing.
39 *
40 * HISTORY
41 * 07/2001 Ported by Wayne Boyer
42 *
43 * RESTRICTIONS
44 * Must be run as non-root user.
45 */
46
47 #include <stdio.h>
48 #include <errno.h>
49 #include "test.h"
50 #include "safe_macros.h"
51 #include <pwd.h>
52
53 char *TCID = "chroot01";
54 int TST_TOTAL = 1;
55 int fail;
56
57 char *path;
58
59 char nobody_uid[] = "nobody";
60 struct passwd *ltpuser;
61
62 void setup(void);
63 void cleanup(void);
64
main(int ac,char ** av)65 int main(int ac, char **av)
66 {
67 int lc;
68
69 tst_parse_opts(ac, av, NULL, NULL);
70
71 setup();
72
73 for (lc = 0; TEST_LOOPING(lc); lc++) {
74
75 tst_count = 0;
76
77 TEST(chroot(path));
78
79 if (TEST_RETURN != -1)
80 tst_resm(TFAIL, "call succeeded unexpectedly");
81 else if (errno != EPERM)
82 tst_resm(TFAIL | TTERRNO, "chroot failed unexpectedly");
83 else
84 tst_resm(TPASS, "chroot set errno to EPERM.");
85 }
86 cleanup();
87
88 tst_exit();
89
90 }
91
setup(void)92 void setup(void)
93 {
94 tst_require_root();
95
96 tst_tmpdir();
97 path = tst_get_tmpdir();
98
99 if ((ltpuser = getpwnam(nobody_uid)) == NULL)
100 tst_brkm(TBROK | TERRNO, cleanup,
101 "getpwnam(\"nobody\") failed");
102
103 SAFE_SETEUID(cleanup, ltpuser->pw_uid);
104
105 tst_sig(NOFORK, DEF_HANDLER, cleanup);
106
107 TEST_PAUSE;
108 }
109
cleanup(void)110 void cleanup(void)
111 {
112 SAFE_SETEUID(NULL, 0);
113
114 free(path);
115 tst_rmdir();
116 }
117