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 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 */ 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 */ 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
