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: sync02
22 *
23 * Test Description:
24 * Open a file for write; modify the file, then do a sync().
25 * Verify that the data has been written to disk by re-opening the file.
26 *
27 * Expected Result:
28 * sync() alawys returns 0 in Linux. The data written to the file should
29 * be updated to the disk.
30 *
31 * Algorithm:
32 * Setup:
33 * Setup signal handling.
34 * Create temporary directory.
35 * Pause for SIGUSR1 if option specified.
36 *
37 * Test:
38 * Loop if the proper options are given.
39 * Execute system call
40 * Check return code, if system call failed (return=-1)
41 * Log the errno and Issue a FAIL message.
42 * Otherwise,
43 * Verify the Functionality of system call
44 * if successful,
45 * Issue Functionality-Pass message.
46 * Otherwise,
47 * Issue Functionality-Fail message.
48 * Cleanup:
49 * Print errno log and/or timing stats if options given
50 * Delete the temporary directory created.
51 *
52 * Usage: <for command-line>
53 * sync02 [-c n] [-f] [-i n] [-I x] [-p x] [-t]
54 * where, -c n : Run n copies concurrently.
55 * -f : Turn off functionality Testing.
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 John George
63 * -Ported
64 *
65 * Restrictions:
66 * None.
67 */
68
69 #include <stdio.h>
70 #include <unistd.h>
71 #include <sys/types.h>
72 #include <errno.h>
73 #include <fcntl.h>
74 #include <string.h>
75 #include <signal.h>
76 #include <sys/stat.h>
77
78 #include "test.h"
79
80 #define TEMP_FILE "temp_file"
81 #define FILE_MODE S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH
82
83 char *TCID = "sync02";
84 int TST_TOTAL = 1;
85 char write_buffer[BUFSIZ]; /* buffer used to write data to file */
86 int fildes; /* file descriptor for temporary file */
87
88 void setup(); /* Main setup function of test */
89 void cleanup(); /* cleanup function for the test */
90
main(int ac,char ** av)91 int main(int ac, char **av)
92 {
93 int lc;
94 char read_buffer[BUFSIZ]; /* buffer used to read data from file */
95
96 tst_parse_opts(ac, av, NULL, NULL);
97
98 setup();
99
100 for (lc = 0; TEST_LOOPING(lc); lc++) {
101
102 tst_count = 0;
103
104 /*
105 * Call sync(2) to commit buffer data to disk.
106 */
107 TEST_VOID(sync());
108
109 if (TEST_RETURN == -1) {
110 tst_resm(TFAIL, "%s, Failed, errno=%d : %s",
111 TCID, TEST_ERRNO, strerror(TEST_ERRNO));
112 } else {
113 /* Set the file ptr to b'nning of file */
114 if (lseek(fildes, 0, SEEK_SET) < 0) {
115 tst_brkm(TFAIL, cleanup, "lseek() "
116 "failed on %s, error=%d",
117 TEMP_FILE, errno);
118 }
119
120 /* Read the contents of file */
121 if (read(fildes, read_buffer,
122 sizeof(read_buffer)) > 0) {
123 if (strcmp(read_buffer, write_buffer)) {
124 tst_resm(TFAIL, "Data read "
125 "from %s doesn't match "
126 "with witten data",
127 TEMP_FILE);
128 } else {
129 tst_resm(TPASS, "Functionality "
130 "of sync() successful");
131 }
132 } else {
133 tst_brkm(TFAIL, cleanup,
134 "read() Fails on %s, error=%d",
135 TEMP_FILE, errno);
136 }
137 }
138 tst_count++; /* incr. TEST_LOOP counter */
139 }
140
141 cleanup();
142 tst_exit();
143 }
144
145 /*
146 * void
147 * setup() - performs all ONE TIME setup for this test.
148 * Create a temporary directory and change directory to it.
149 * Create a test file under temporary directory and write some
150 * data into it.
151 */
setup(void)152 void setup(void)
153 {
154
155 tst_sig(NOFORK, DEF_HANDLER, cleanup);
156
157 /* Pause if that option was specified
158 * TEST_PAUSE contains the code to fork the test with the -i option.
159 * You want to make sure you do this before you create your temporary
160 * directory.
161 */
162 TEST_PAUSE;
163
164 tst_tmpdir();
165
166 /* Copy some data into data buffer */
167 strcpy(write_buffer, "abcdefghijklmnopqrstuvwxyz");
168
169 /* Creat a temporary file under above directory */
170 if ((fildes = open(TEMP_FILE, O_RDWR | O_CREAT, FILE_MODE)) == -1) {
171 tst_brkm(TBROK, cleanup,
172 "open(%s, O_RDWR | O_CREAT, %#o) Failed, errno=%d :%s",
173 TEMP_FILE, FILE_MODE, errno, strerror(errno));
174 }
175
176 /* Write the buffer data into file */
177 if (write(fildes, write_buffer, strlen(write_buffer) + 1) !=
178 strlen(write_buffer) + 1) {
179 tst_brkm(TBROK, cleanup,
180 "write() failed to write buffer data to %s",
181 TEMP_FILE);
182 }
183
184 }
185
186 /*
187 * void
188 * cleanup() - performs all ONE TIME cleanup for this test at
189 * completion or premature exit.
190 * Remove the test directory and testfile created in the setup.
191 */
cleanup(void)192 void cleanup(void)
193 {
194
195 /* Close the temporary file */
196 if (close(fildes) == -1) {
197 tst_brkm(TFAIL, NULL,
198 "close(%s) Failed, errno=%d : %s",
199 TEMP_FILE, errno, strerror(errno));
200 }
201
202 tst_rmdir();
203
204 }
205