1 /*
2 * Copyright (c) International Business Machines Corp., 2001
3 * 07/2001 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 Foundation,
17 * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
18 */
19
20 /*
21 * Testcase to check creat(2) fails with EACCES
22 */
23
24 #include <stdio.h>
25 #include <errno.h>
26 #include <fcntl.h>
27 #include <pwd.h>
28 #include <sys/types.h>
29 #include <sys/stat.h>
30
31 #include "tst_test.h"
32
33 #define DIRNAME "testdir"
34 #define FILENAME DIRNAME"/file1"
35
36 static uid_t nobody_uid;
37
38 static struct tcase {
39 const char *fname;
40 } tcases[] = {
41 {DIRNAME "/file"},
42 {FILENAME}
43 };
44
child_fn(unsigned int i)45 static void child_fn(unsigned int i)
46 {
47 SAFE_SETEUID(nobody_uid);
48
49 TEST(creat(tcases[i].fname, 0444));
50
51 if (TEST_RETURN != -1) {
52 SAFE_UNLINK(tcases[i].fname);
53 tst_res(TFAIL, "call succeeded unexpectedly");
54 return;
55 }
56
57 if (TEST_ERRNO != EACCES) {
58 tst_res(TFAIL | TTERRNO, "Expected EACCES");
59 return;
60 }
61
62 tst_res(TPASS, "call failed with EACCES as expected");
63 }
64
verify_creat(unsigned int i)65 static void verify_creat(unsigned int i)
66 {
67 if (SAFE_FORK() == 0)
68 child_fn(i);
69 }
70
setup(void)71 static void setup(void)
72 {
73 struct passwd *pw;
74 int fd;
75
76 pw = SAFE_GETPWNAM("nobody");
77 nobody_uid = pw->pw_uid;
78
79 SAFE_MKDIR(DIRNAME, 0700);
80 fd = SAFE_OPEN(FILENAME, O_RDWR | O_CREAT, 0444);
81 SAFE_CLOSE(fd);
82 }
83
84 static struct tst_test test = {
85 .tcnt = ARRAY_SIZE(tcases),
86 .test = verify_creat,
87 .needs_tmpdir = 1,
88 .needs_root = 1,
89 .forks_child = 1,
90 .setup = setup,
91 };
92