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 * Test Name: mknod06
22 *
23 * Test Description:
24 * Verify that,
25 * 1) mknod(2) returns -1 and sets errno to EEXIST if specified path
26 * already exists.
27 * 2) mknod(2) returns -1 and sets errno to EFAULT if pathname points
28 * outside user's accessible address space.
29 * 3) mknod(2) returns -1 and sets errno to ENOENT if the directory
30 * component in pathname does not exist.
31 * 4) mknod(2) returns -1 and sets errno to ENAMETOOLONG if the pathname
32 * component was too long.
33 * 5) mknod(2) returns -1 and sets errno to ENOTDIR if the directory
34 * component in pathname is not a directory.
35 *
36 * Expected Result:
37 * mknod() should fail with return value -1 and set expected errno.
38 *
39 * Algorithm:
40 * Setup:
41 * Setup signal handling.
42 * Create temporary directory.
43 * Pause for SIGUSR1 if option specified.
44 *
45 * Test:
46 * Loop if the proper options are given.
47 * Execute system call
48 * Check return code, if system call failed (return=-1)
49 * if errno set == expected errno
50 * Issue sys call fails with expected return value and errno.
51 * Otherwise,
52 * Issue sys call fails with unexpected errno.
53 * Otherwise,
54 * Issue sys call returns unexpected value.
55 *
56 * Cleanup:
57 * Print errno log and/or timing stats if options given
58 * Delete the temporary directory(s)/file(s) created.
59 *
60 * Usage: <for command-line>
61 * mknod06 [-c n] [-e] [-i n] [-I x] [-P x] [-t]
62 * where, -c n : Run n copies concurrently.
63 * -e : Turn on errno logging.
64 * -i n : Execute test n times.
65 * -I x : Execute test for x seconds.
66 * -P x : Pause for x seconds between iterations.
67 * -t : Turn on syscall timing.
68 *
69 * HISTORY
70 * 07/2001 Ported by Wayne Boyer
71 *
72 * RESTRICTIONS:
73 * This test should be executed by super-user (root) only.
74 */
75
76 #include <stdio.h>
77 #include <stdlib.h>
78 #include <unistd.h>
79 #include <errno.h>
80 #include <string.h>
81 #include <signal.h>
82 #include <sys/types.h>
83 #include <sys/stat.h>
84 #include <sys/param.h>
85 #include <sys/mman.h>
86
87 #include "test.h"
88
89 #define MODE_RWX S_IFIFO | S_IRWXU | S_IRWXG | S_IRWXO
90
91 int setup1(); /* setup function to test mknod for EEXIST */
92 int setup3(); /* setup function to test mknod for ENOTDIR */
93 int longpath_setup(); /* setup function to test mknod for ENAMETOOLONG */
94 int no_setup(); /* simply returns 0 to the caller */
95 char Longpathname[PATH_MAX + 2];
96
97 struct test_case_t { /* test case struct. to hold ref. test cond's */
98 char *pathname;
99 char *desc;
100 int exp_errno;
101 int (*setupfunc) ();
102 } Test_cases[] = {
103 {"tnode_1", "Specified node already exists", EEXIST, setup1}, {
104 NULL, "Invalid address", EFAULT, no_setup}, {
105 "testdir_2/tnode_2", "Non-existent file", ENOENT, no_setup}, {
106 "", "Pathname is empty", ENOENT, no_setup}, {
107 Longpathname, "Pathname too long", ENAMETOOLONG, longpath_setup}, {
108 "tnode/tnode_3", "Path contains regular file", ENOTDIR, setup3}, {
109 NULL, NULL, 0, no_setup}
110 };
111
112 char *TCID = "mknod06";
113 int TST_TOTAL = ARRAY_SIZE(Test_cases);
114
115 void setup(); /* setup function for the tests */
116 void cleanup(); /* cleanup function for the tests */
117
main(int ac,char ** av)118 int main(int ac, char **av)
119 {
120 int lc;
121 char *node_name; /* ptr. for node name created */
122 char *test_desc; /* test specific error message */
123 int ind; /* counter to test different test conditions */
124
125 tst_parse_opts(ac, av, NULL, NULL);
126
127 /*
128 * Invoke setup function to call individual test setup functions
129 * for the test which run as root/super-user.
130 */
131 setup();
132
133 for (lc = 0; TEST_LOOPING(lc); lc++) {
134
135 tst_count = 0;
136
137 for (ind = 0; Test_cases[ind].desc != NULL; ind++) {
138 node_name = Test_cases[ind].pathname;
139 test_desc = Test_cases[ind].desc;
140
141 /*
142 * Call mknod(2) to test different test conditions.
143 * verify that it fails with -1 return value and
144 * sets appropriate errno.
145 */
146 TEST(mknod(node_name, MODE_RWX, 0));
147
148 /* Check return code from mknod(2) */
149 if (TEST_RETURN != -1) {
150 tst_resm(TFAIL,
151 "mknod() returned %ld, expected "
152 "-1, errno:%d", TEST_RETURN,
153 Test_cases[ind].exp_errno);
154 continue;
155 }
156
157 if (TEST_ERRNO == Test_cases[ind].exp_errno) {
158 tst_resm(TPASS, "mknod() fails, %s, errno:%d",
159 test_desc, TEST_ERRNO);
160 } else {
161 tst_resm(TFAIL, "mknod() fails, %s, errno:%d, "
162 "expected errno:%d", test_desc,
163 TEST_ERRNO, Test_cases[ind].exp_errno);
164 }
165 }
166
167 }
168
169 /*
170 * Invoke cleanup() to delete the test directories created
171 * in the setup().
172 */
173 cleanup();
174
175 tst_exit();
176 }
177
178 /*
179 * setup(void) - performs all ONE TIME setup for this test.
180 * Exit the test program on receipt of unexpected signals.
181 * Create a temporary directory used to hold test directories and nodes
182 * created and change the directory to it.
183 * Invoke individual test setup functions according to the order
184 * set in struct. definition.
185 */
setup(void)186 void setup(void)
187 {
188 int ind;
189
190 tst_require_root();
191
192 /* Capture unexpected signals */
193 tst_sig(NOFORK, DEF_HANDLER, cleanup);
194
195 TEST_PAUSE;
196
197 /* Make a temp dir and cd to it */
198 tst_tmpdir();
199
200 /* call individual setup functions */
201 for (ind = 0; Test_cases[ind].desc != NULL; ind++) {
202 if (!Test_cases[ind].pathname)
203 Test_cases[ind].pathname = tst_get_bad_addr(cleanup);
204 Test_cases[ind].setupfunc();
205 }
206 }
207
208 /*
209 * no_setup() - Some test conditions for mknod(2) do not any setup.
210 * Hence, this function just returns 0.
211 */
no_setup(void)212 int no_setup(void)
213 {
214 return 0;
215 }
216
217 /*
218 * longpath_setup() - setup to create a node with a name length exceeding
219 * the MAX. length of PATH_MAX.
220 * This function retruns 0.
221 */
longpath_setup(void)222 int longpath_setup(void)
223 {
224 int ind; /* counter variable */
225
226 for (ind = 0; ind <= (PATH_MAX + 1); ind++) {
227 Longpathname[ind] = 'a';
228 }
229 return 0;
230 }
231
232 /*
233 * setup1() - setup function for a test condition for which mknod(2)
234 * returns -1 and sets errno to EEXIST.
235 * This function creates a node using mknod(2) and tries to create
236 * same node in the test and fails with above errno.
237 * This function returns 0.
238 */
setup1(void)239 int setup1(void)
240 {
241 /* Create a node using mknod */
242 if (mknod("tnode_1", MODE_RWX, 0) < 0) {
243 tst_brkm(TBROK, cleanup, "Fails to create node in setup1()");
244 }
245
246 return 0;
247 }
248
249 /*
250 * setup3() - setup function for a test condition for which mknod(2)
251 * returns -1 and sets errno to ENOTDIR.
252 * This function creates a node under temporary directory and the
253 * test attempts to create another node under under this node and fails
254 * with ENOTDIR as the node created here is a regular file.
255 * This function returns 0.
256 */
setup3(void)257 int setup3(void)
258 {
259 /* Create a node using mknod */
260 if (mknod("tnode", MODE_RWX, 0) < 0) {
261 tst_brkm(TBROK, cleanup, "Fails to create node in setup3()");
262 }
263
264 return 0;
265 }
266
267 /*
268 * cleanup() - Performs all ONE TIME cleanup for this test at
269 * completion or premature exit.
270 * Print test timing stats and errno log if test executed with options.
271 * Remove temporary directory and sub-directories/files under it
272 * created during setup().
273 * Exit the test program with normal exit code.
274 */
cleanup(void)275 void cleanup(void)
276 {
277
278 tst_rmdir();
279
280 }
281