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 * execve03.c
23 *
24 * DESCRIPTION
25 * Testcase to check execve sets the following errnos correctly:
26 * 1. ENAMETOOLONG
27 * 2. ENOENT
28 * 3. ENOTDIR
29 * 4. EFAULT
30 * 5. EACCES
31 * 6. ENOEXEC
32 *
33 * ALGORITHM
34 * 1. Attempt to execve(2) a file whose name is more than
35 * VFS_MAXNAMLEN fails with ENAMETOOLONG.
36 *
37 * 2. Attempt to execve(2) a file which doesn't exist fails with
38 * ENOENT.
39 *
40 * 3. Attempt to execve(2) a pathname (executabl) comprising of a
41 * directory, which doesn't exist fails with ENOTDIR.
42 *
43 * 4. Attempt to execve(2) a filename not within the address space
44 * of the process fails with EFAULT.
45 *
46 * 5. Attempt to execve(2) a filename that does not have executable
47 * permission - fails with EACCES.
48 *
49 * 6. Attempt to execve(2) a zero length file with executable
50 * permissions - fails with ENOEXEC.
51 *
52 * USAGE: <for command-line>
53 * execve03 [-c n] [-e] [-i n] [-I x] [-P x] [-t]
54 * where, -c n : Run n copies concurrently.
55 * -e : Turn on errno logging.
56 * -i n : Execute test n times.
57 * -I x : Execute test for x seconds.
58 * -P x : Pause for x seconds between iterations.
59 * -t : Turn on syscall timing.
60 *
61 * HISTORY
62 * 07/2001 Ported by Wayne Boyer
63 *
64 * RESTRICTIONS
65 * test #5 will fail with ETXTBSY not EACCES if the test is run as root
66 */
67
68 #include <sys/types.h>
69 #include <sys/mman.h>
70 #include <sys/stat.h>
71 #include <errno.h>
72 #include <fcntl.h>
73 #include <pwd.h>
74 #include <stdio.h>
75
76 #include "test.h"
77 #include "safe_macros.h"
78
79 char *TCID = "execve03";
80 int fileHandle = 0;
81
82 char nobody_uid[] = "nobody";
83 struct passwd *ltpuser;
84
85 #ifndef UCLINUX
86 void *bad_addr = NULL;
87 #endif
88
89 void setup(void);
90 void cleanup(void);
91
92 char long_file[] =
93 "abcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstmnopqrstuvwxyzabcdefghijklmnopqrstmnopqrstuvwxyzabcdefghijklmnopqrstmnopqrstuvwxyzabcdefghijklmnopqrstmnopqrstuvwxyzabcdefghijklmnopqrstmnopqrstuvwxyzabcdefghijklmnopqrstmnopqrstuvwxyz";
94 char no_dir[] = "testdir";
95 char test_name3[1000];
96 char test_name5[1000];
97 char test_name6[1000];
98
99 struct test_case_t {
100 char *tname; /* the command name to pass to execve() */
101 int error;
102 } TC[] = {
103 /* the file name is greater than VFS_MAXNAMELEN - ENAMTOOLONG */
104 {
105 long_file, ENAMETOOLONG},
106 /* the filename does not exist - ENOENT */
107 {
108 no_dir, ENOENT},
109 /* the path contains a directory name which doesn't exist - ENOTDIR */
110 {
111 test_name3, ENOTDIR},
112 #if !defined(UCLINUX)
113 /* the filename isn't part of the process address space - EFAULT */
114 {
115 (char *)-1, EFAULT},
116 #endif
117 /* the filename does not have execute permission - EACCES */
118 {
119 test_name5, EACCES},
120 /* the file is zero length with execute permissions - ENOEXEC */
121 {
122 test_name6, ENOEXEC}
123 };
124
125 int TST_TOTAL = ARRAY_SIZE(TC);
126
main(int ac,char ** av)127 int main(int ac, char **av)
128 {
129 int lc;
130 int i;
131
132 tst_parse_opts(ac, av, NULL, NULL);
133
134 setup();
135
136 for (lc = 0; TEST_LOOPING(lc); lc++) {
137
138 tst_count = 0;
139
140 for (i = 0; i < TST_TOTAL; i++) {
141
142 TEST(execve(TC[i].tname, av, NULL));
143
144 if (TEST_RETURN != -1) {
145 tst_resm(TFAIL, "call succeeded unexpectedly");
146 continue;
147 }
148
149 if (TEST_ERRNO == TC[i].error)
150 tst_resm(TPASS | TTERRNO,
151 "execve failed as expected");
152 else
153 tst_resm(TFAIL | TTERRNO,
154 "execve failed unexpectedly; expected "
155 "%d - %s",
156 TC[i].error, strerror(TC[i].error));
157 }
158 }
159 cleanup();
160
161 tst_exit();
162 }
163
setup(void)164 void setup(void)
165 {
166 char *cwdname = NULL;
167 int fd;
168
169 tst_require_root();
170
171 umask(0);
172
173 tst_sig(NOFORK, DEF_HANDLER, cleanup);
174
175 TEST_PAUSE;
176
177 ltpuser = SAFE_GETPWNAM(NULL, nobody_uid);
178
179 SAFE_SETGID(NULL, ltpuser->pw_gid);
180
181 tst_tmpdir();
182
183 cwdname = SAFE_GETCWD(cleanup, cwdname, 0);
184
185 sprintf(test_name5, "%s/fake.%d", cwdname, getpid());
186
187 fileHandle = SAFE_CREAT(cleanup, test_name5, 0444);
188
189 sprintf(test_name3, "%s/fake.%d", test_name5, getpid());
190
191 /* creat() and close a zero length file with executeable permission */
192 sprintf(test_name6, "%s/execve03.%d", cwdname, getpid());
193
194 fd = SAFE_CREAT(cleanup, test_name6, 0755);
195 fd = SAFE_CLOSE(cleanup, fd);
196 #ifndef UCLINUX
197 bad_addr = SAFE_MMAP(cleanup, NULL, 1, PROT_NONE,
198 MAP_PRIVATE_EXCEPT_UCLINUX | MAP_ANONYMOUS, 0, 0);
199 TC[3].tname = bad_addr;
200 #endif
201 }
202
cleanup(void)203 void cleanup(void)
204 {
205 #ifndef UCLINUX
206 SAFE_MUNMAP(NULL, bad_addr, 1);
207 #endif
208 SAFE_CLOSE(NULL, fileHandle);
209
210 tst_rmdir();
211
212 }
213