1 /*
2 * Copyright (c) 2013 Wanlong Gao <gaowanlong@cn.fujitsu.com>
3 *
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation; either version 2 of the License, or
7 * (at your option) any later version.
8 *
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
12 * the GNU General Public License for more details.
13 *
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software
16 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
17 */
18
19 /*
20 * DESCRIPTION
21 * Check for the following errors:
22 * 1. EEXIST
23 * 2. EISDIR
24 * 3. ENOTDIR
25 * 4. ENAMETOOLONG
26 * 5. EACCES
27 * 6. EFAULT
28 *
29 * ALGORITHM
30 * 1. Open a file with O_CREAT and O_EXCL, when the file already
31 * exists. Check the errno for EEXIST
32 *
33 * 2. Pass a directory as the pathname and request a write access,
34 * check for errno for EISDIR
35 *
36 * 3. Specify O_DIRECTORY as a parameter to open and pass a file as the
37 * pathname, check errno for ENOTDIR
38 *
39 * 4. Attempt to open() a filename which is more than VFS_MAXNAMLEN, and
40 * check for errno to be ENAMETOOLONG.
41 *
42 * 5. Attempt to open a test executable in WRONLY mode,
43 * open(2) should fail with EACCES.
44 *
45 * 6. Attempt to pass an invalid pathname with an address pointing outside
46 * the address space of the process, as the argument to open(), and
47 * expect to get EFAULT.
48 */
49
50 #define _GNU_SOURCE /* for O_DIRECTORY */
51 #include <sys/types.h>
52 #include <sys/stat.h>
53 #include <stdio.h>
54 #include <errno.h>
55 #include <sys/mman.h>
56 #include <fcntl.h>
57 #include <signal.h>
58 #include <pwd.h>
59 #include "test.h"
60 #include "safe_macros.h"
61
62 static void setup(void);
63 static void cleanup(void);
64
65 char *TCID = "open08";
66
67 static char nobody_uid[] = "nobody";
68 static struct passwd *ltpuser;
69
70 static char *bad_addr;
71
72 static char filename[40] = "";
73 static char fname[] = "/bin/cat";
74 static char bad_file[] = "abcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstmnopqrstuvwxyzabcdefghijklmnopqrstmnopqrstuvwxyzabcdefghijklmnopqrstmnopqrstuvwxyzabcdefghijklmnopqrstmnopqrstuvwxyzabcdefghijklmnopqrstmnopqrstuvwxyzabcdefghijklmnopqrstmnopqrstuvwxyz";
75
76 static struct test_case_t {
77 char *fname;
78 int flags;
79 int error;
80 } TC[] = {
81 {filename, O_CREAT | O_EXCL, EEXIST},
82 {"/tmp", O_RDWR, EISDIR},
83 {filename, O_DIRECTORY, ENOTDIR},
84 {bad_file, O_RDWR, ENAMETOOLONG},
85 {fname, O_WRONLY, EACCES},
86 #if !defined(UCLINUX)
87 {(char *)-1, O_CREAT, EFAULT}
88 #endif
89 };
90
91 int TST_TOTAL = sizeof(TC) / sizeof(TC[0]);
92
main(int ac,char ** av)93 int main(int ac, char **av)
94 {
95 int lc;
96 int i;
97
98 tst_parse_opts(ac, av, NULL, NULL);
99
100 setup();
101
102 for (lc = 0; TEST_LOOPING(lc); lc++) {
103 tst_count = 0;
104
105 for (i = 0; i < TST_TOTAL; i++) {
106 TEST(open(TC[i].fname, TC[i].flags,
107 S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH));
108
109 if (TEST_RETURN != -1) {
110 tst_resm(TFAIL, "call succeeded unexpectedly");
111 continue;
112 }
113
114 if (TEST_ERRNO == TC[i].error) {
115 tst_resm(TPASS, "expected failure - "
116 "errno = %d : %s", TEST_ERRNO,
117 strerror(TEST_ERRNO));
118 } else {
119 tst_resm(TFAIL, "unexpected error - %d : %s - "
120 "expected %d", TEST_ERRNO,
121 strerror(TEST_ERRNO), TC[i].error);
122 }
123 }
124 }
125
126 cleanup();
127 tst_exit();
128 }
129
setup(void)130 static void setup(void)
131 {
132 int fildes;
133
134 tst_require_root();
135
136 tst_sig(NOFORK, DEF_HANDLER, cleanup);
137
138 umask(0);
139
140 TEST_PAUSE;
141
142 /* Switch to nobody user for correct error code collection */
143 ltpuser = getpwnam(nobody_uid);
144 SAFE_SETGID(NULL, ltpuser->pw_gid);
145 SAFE_SETUID(NULL, ltpuser->pw_uid);
146
147 tst_tmpdir();
148
149 sprintf(filename, "open3.%d", getpid());
150
151 fildes = SAFE_CREAT(cleanup, filename, 0600);
152
153 close(fildes);
154
155 #if !defined(UCLINUX)
156 bad_addr = mmap(0, 1, PROT_NONE,
157 MAP_PRIVATE_EXCEPT_UCLINUX | MAP_ANONYMOUS, 0, 0);
158 if (bad_addr == MAP_FAILED)
159 tst_brkm(TBROK, cleanup, "mmap failed");
160
161 TC[5].fname = bad_addr;
162 #endif
163 }
164
cleanup(void)165 static void cleanup(void)
166 {
167 tst_rmdir();
168 }
169