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
83char *TCID = "sync02";
84int TST_TOTAL = 1;
85char write_buffer[BUFSIZ];	/* buffer used to write data to file */
86int fildes;			/* file descriptor for temporary file */
87
88void setup();			/* Main setup function of test */
89void cleanup();			/* cleanup function for the test */
90
91int 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 */
152void 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 */
192void 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