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: stat02
22 *
23 * Test Description:
24 * Verify that, stat(2) succeeds to get the status of a file and fills the
25 * stat structure elements though process doesn't have read access to the
26 * file.
27 *
28 * Expected Result:
29 * stat() should return value 0 on success and the stat structure elements
30 * should be filled with specified 'file' information.
31 *
32 * Algorithm:
33 * Setup:
34 * Setup signal handling.
35 * Create temporary directory.
36 * Pause for SIGUSR1 if option specified.
37 *
38 * Test:
39 * Loop if the proper options are given.
40 * Execute system call
41 * Check return code, if system call failed (return=-1)
42 * Log the errno and Issue a FAIL message.
43 * Otherwise,
44 * Verify the Functionality of system call
45 * if successful,
46 * Issue Functionality-Pass message.
47 * Otherwise,
48 * Issue Functionality-Fail message.
49 * Cleanup:
50 * Print errno log and/or timing stats if options given
51 * Delete the temporary directory created.
52 *
53 * Usage: <for command-line>
54 * stat02 [-c n] [-e] [-f] [-i n] [-I x] [-p x] [-t]
55 * where, -c n : Run n copies concurrently.
56 * -e : Turn on errno logging.
57 * -f : Turn off functionality Testing.
58 * -i n : Execute test n times.
59 * -I x : Execute test for x seconds.
60 * -P x : Pause for x seconds between iterations.
61 * -t : Turn on syscall timing.
62 *
63 * History
64 * 07/2001 John George
65 * -Ported
66 *
67 * Restrictions:
68 *
69 */
70 #include <stdio.h>
71 #include <sys/types.h>
72 #include <fcntl.h>
73 #include <sys/stat.h>
74 #include <errno.h>
75 #include <string.h>
76 #include <signal.h>
77 #include <pwd.h>
78
79 #include "test.h"
80 #include "safe_macros.h"
81
82 #define FILE_MODE S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH
83 #define TESTFILE "testfile"
84 #define FILE_SIZE 1024
85 #define BUF_SIZE 256
86 #define NEW_MODE 0222
87 #define MASK 0777
88
89 char *TCID = "stat02";
90 int TST_TOTAL = 1;
91
92 uid_t user_id; /* eff. user id/group id of test process */
93 gid_t group_id;
94 char nobody_uid[] = "nobody";
95 struct passwd *ltpuser;
96
97 void setup();
98 void cleanup();
99
main(int ac,char ** av)100 int main(int ac, char **av)
101 {
102 struct stat stat_buf; /* stat structure buffer */
103 int lc;
104
105 tst_parse_opts(ac, av, NULL, NULL);
106
107 setup();
108
109 for (lc = 0; TEST_LOOPING(lc); lc++) {
110
111 tst_count = 0;
112
113 /*
114 * Call stat(2) to get the status of
115 * specified 'file' into stat structure.
116 */
117 TEST(stat(TESTFILE, &stat_buf));
118
119 if (TEST_RETURN == -1) {
120 tst_resm(TFAIL,
121 "stat(%s, &stat_buf) Failed, errno=%d : %s",
122 TESTFILE, TEST_ERRNO, strerror(TEST_ERRNO));
123 } else {
124 stat_buf.st_mode &= ~S_IFREG;
125 /*
126 * Verify the data returned by stat(2)
127 * aganist the expected data.
128 */
129 if ((stat_buf.st_uid != user_id) ||
130 (stat_buf.st_gid != group_id) ||
131 (stat_buf.st_size != FILE_SIZE) ||
132 ((stat_buf.st_mode & MASK) != NEW_MODE)) {
133 tst_resm(TFAIL, "Functionality of "
134 "stat(2) on '%s' Failed",
135 TESTFILE);
136 } else {
137 tst_resm(TPASS, "Functionality of "
138 "stat(2) on '%s' Succcessful",
139 TESTFILE);
140 }
141 }
142 tst_count++; /* incr TEST_LOOP counter */
143 }
144
145 cleanup();
146 tst_exit();
147 }
148
149 /*
150 * void
151 * setup() - Performs setup function for the test.
152 * Creat a temporary directory and change directory to it.
153 * Creat a testfile and write some data into it.
154 * Modify the mode permissions of testfile such that test process
155 * has read-only access to testfile.
156 */
setup(void)157 void setup(void)
158 {
159 int i, fd; /* counter, file handle for file */
160 char tst_buff[BUF_SIZE]; /* data buffer for file */
161 int wbytes; /* no. of bytes written to file */
162 int write_len = 0;
163
164 tst_require_root();
165
166 tst_sig(NOFORK, DEF_HANDLER, cleanup);
167
168 /* Switch to nobody user for correct error code collection */
169 ltpuser = getpwnam(nobody_uid);
170 if (setuid(ltpuser->pw_uid) == -1) {
171 tst_resm(TINFO, "setuid failed to "
172 "to set the effective uid to %d", ltpuser->pw_uid);
173 perror("setuid");
174 }
175
176 /* Pause if that option was specified
177 * TEST_PAUSE contains the code to fork the test with the -i option.
178 * You want to make sure you do this before you create your temporary
179 * directory.
180 */
181 TEST_PAUSE;
182
183 tst_tmpdir();
184
185 if ((fd = open(TESTFILE, O_RDWR | O_CREAT, FILE_MODE)) == -1) {
186 tst_brkm(TBROK, cleanup,
187 "open(%s, O_RDWR|O_CREAT, %#o) Failed, errno=%d : %s",
188 TESTFILE, FILE_MODE, errno, strerror(errno));
189 }
190
191 /* Fill the test buffer with the known data */
192 for (i = 0; i < BUF_SIZE; i++) {
193 tst_buff[i] = 'a';
194 }
195
196 /* Write to the file 1k data from the buffer */
197 while (write_len < FILE_SIZE) {
198 if ((wbytes = write(fd, tst_buff, sizeof(tst_buff))) <= 0) {
199 tst_brkm(TBROK | TERRNO, cleanup, "write to %s failed",
200 TESTFILE);
201 } else {
202 write_len += wbytes;
203 }
204 }
205
206 if (close(fd) == -1) {
207 tst_resm(TWARN | TERRNO, "closing %s failed", TESTFILE);
208 }
209
210 /* Modify mode permissions on the testfile */
211 SAFE_CHMOD(cleanup, TESTFILE, NEW_MODE);
212
213 /* Get the uid/gid of the process */
214 user_id = getuid();
215 group_id = getgid();
216
217 }
218
219 /*
220 * cleanup() - performs all ONE TIME cleanup for this test at
221 * completion or premature exit.
222 * Remove the temporary directory and file created.
223 */
cleanup(void)224 void cleanup(void)
225 {
226
227 tst_rmdir();
228 }
229