1 /*
2 * Copyright (c) 2014 Fujitsu Ltd.
3 * Author: Zeng Linggang <zenglg.jy@cn.fujitsu.com>
4 *
5 * This program is free software; you can redistribute it and/or modify it
6 * under the terms of version 2 of the GNU General Public License as
7 * published by the Free Software Foundation.
8 *
9 * This program is distributed in the hope that it would be useful, but
10 * WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
12 *
13 * You should have received a copy of the GNU General Public License along
14 * with this program; if not, write the Free Software Foundation, Inc.,
15 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
16 */
17 /*
18 * Test Description:
19 * Verify that,
20 * File system UID is always set to the same value as the (possibly new)
21 * effective UID.
22 */
23
24 #define _GNU_SOURCE
25
26 #include <errno.h>
27 #include <unistd.h>
28 #include <pwd.h>
29 #include <sys/stat.h>
30 #include "test.h"
31 #include "safe_macros.h"
32 #include "compat_16.h"
33
34 TCID_DEFINE(setresuid05);
35 int TST_TOTAL = 1;
36 static struct passwd *ltpuser;
37 static void setup(void);
38 static void setresuid_verify(void);
39 static void cleanup(void);
40
main(int argc,char ** argv)41 int main(int argc, char **argv)
42 {
43 int i, lc;
44
45 tst_parse_opts(argc, argv, NULL, NULL);
46
47 setup();
48
49 for (lc = 0; TEST_LOOPING(lc); lc++) {
50 tst_count = 0;
51 for (i = 0; i < TST_TOTAL; i++)
52 setresuid_verify();
53 }
54
55 cleanup();
56 tst_exit();
57 }
58
setup(void)59 static void setup(void)
60 {
61 tst_require_root();
62
63 tst_sig(NOFORK, DEF_HANDLER, cleanup);
64
65 TEST_PAUSE;
66
67 tst_tmpdir();
68
69 ltpuser = SAFE_GETPWNAM(cleanup, "nobody");
70
71 UID16_CHECK(ltpuser->pw_uid, "setresuid", cleanup)
72 }
73
setresuid_verify(void)74 static void setresuid_verify(void)
75 {
76 struct stat buf;
77
78 TEST(SETRESUID(cleanup, -1, ltpuser->pw_uid, -1));
79
80 if (TEST_RETURN != 0) {
81 tst_resm(TFAIL | TTERRNO, "setresuid failed unexpectedly");
82 return;
83 }
84
85 SAFE_TOUCH(cleanup, "test_file", 0644, NULL);
86
87 SAFE_STAT(cleanup, "test_file", &buf);
88
89 if (ltpuser->pw_uid == buf.st_uid) {
90 tst_resm(TPASS, "setresuid succeeded as expected");
91 } else {
92 tst_resm(TFAIL,
93 "setresuid failed unexpectedly; euid(%d) - st_uid(%d)",
94 ltpuser->pw_uid, buf.st_uid);
95 }
96 }
97
cleanup(void)98 static void cleanup(void)
99 {
100 if (seteuid(0) < 0)
101 tst_resm(TWARN | TERRNO, "seteuid failed");
102
103 tst_rmdir();
104 }
105