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 <pwd.h>
51
52 char *TCID = "chroot01";
53 int TST_TOTAL = 1;
54 int fail;
55
56 #ifndef ANDROID
57 char path[] = "/tmp";
58 #else
59 char path[] = "/data/local/tmp";
60 #endif
61
62 char nobody_uid[] = "nobody";
63 struct passwd *ltpuser;
64
65 void setup(void);
66 void cleanup(void);
67
main(int ac,char ** av)68 int main(int ac, char **av)
69 {
70 int lc;
71
72 tst_parse_opts(ac, av, NULL, NULL);
73
74 setup();
75
76 for (lc = 0; TEST_LOOPING(lc); lc++) {
77
78 tst_count = 0;
79
80 TEST(chroot(path));
81
82 if (TEST_RETURN != -1)
83 tst_resm(TFAIL, "call succeeded unexpectedly");
84 else if (errno != EPERM)
85 tst_resm(TFAIL | TTERRNO, "chroot failed unexpectedly");
86 else
87 tst_resm(TPASS, "chroot set errno to EPERM.");
88 }
89 cleanup();
90
91 tst_exit();
92
93 }
94
setup(void)95 void setup(void)
96 {
97 tst_require_root();
98
99 tst_tmpdir();
100
101 if ((ltpuser = getpwnam(nobody_uid)) == NULL)
102 tst_brkm(TBROK | TERRNO, cleanup,
103 "getpwnam(\"nobody\") failed");
104
105 if (seteuid(ltpuser->pw_uid) == -1)
106 tst_brkm(TBROK | TERRNO, cleanup, "seteuid to nobody failed");
107
108 tst_sig(NOFORK, DEF_HANDLER, cleanup);
109
110 TEST_PAUSE;
111 }
112
cleanup(void)113 void cleanup(void)
114 {
115 if (seteuid(0) == -1)
116 tst_brkm(TBROK | TERRNO, NULL, "setuid(0) failed");
117
118 tst_rmdir();
119 }
120