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: lseek06 22 * 23 * Test Description: 24 * Verify that, lseek() call succeeds to set the file pointer position 25 * to less than or equal to the file size, when a file is opened for 26 * read or write. 27 * 28 * Expected Result: 29 * lseek() should return the offset from the beginning of the file measured 30 * in bytes. Also check if able to read valid data from this location. 31 * $ 32 * Algorithm: 33 * Setup: 34 * Setup signal handling. 35 * Pause for SIGUSR1 if option specified. 36 * Create temporary directory. 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 * lseek06 [-c n] [-f] [-i n] [-I x] [-P x] [-t] 55 * where, -c n : Run n copies concurrently. 56 * -f : Turn off functionality Testing. 57 * -i n : Execute test n times. 58 * -I x : Execute test for x seconds. 59 * -P x : Pause for x seconds between iterations. 60 * -t : Turn on syscall timing. 61 * 62 * HISTORY 63 * 07/2001 Ported by Wayne Boyer 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 <utime.h> 75 #include <string.h> 76 #include <sys/stat.h> 77 #include <signal.h> 78 79 #include "test.h" 80 81 #define OFFSET 4 82 #define TEMP_FILE "tmp_file" 83 #define FILE_MODE S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH 84 85 char *TCID = "lseek06"; 86 int TST_TOTAL = 1; 87 int fildes; /* file handle for temp file */ 88 89 void setup(); /* Main setup function of test */ 90 void cleanup(); /* cleanup function for the test */ 91 92 int main(int ac, char **av) 93 { 94 int lc; 95 char read_buf[1]; /* data read from temp. file */ 96 97 tst_parse_opts(ac, av, NULL, NULL); 98 99 setup(); 100 101 for (lc = 0; TEST_LOOPING(lc); lc++) { 102 103 tst_count = 0; 104 105 /* 106 * Invoke lseek(2) to move the read/write file 107 * pointer/handle by OFFSET bytes. 108 */ 109 TEST(lseek(fildes, OFFSET, SEEK_SET)); 110 111 if (TEST_RETURN == (off_t) - 1) { 112 tst_resm(TFAIL, "lseek on (%s) Failed, errno=%d : %s", 113 TEMP_FILE, TEST_ERRNO, strerror(TEST_ERRNO)); 114 continue; 115 } 116 /* 117 * Check if the return value from lseek(2) 118 * is equal to the specified OFFSET value. 119 */ 120 if (TEST_RETURN != OFFSET) { 121 tst_resm(TFAIL, "lseek() returned incorrect " 122 "value %ld, expected %d", 123 TEST_RETURN, OFFSET); 124 continue; 125 } 126 /* 127 * The return value is good, now check data. 128 * Read the data byte from this location. 129 */ 130 if (read(fildes, &read_buf, sizeof(read_buf)) < 0) { 131 tst_brkm(TFAIL, cleanup, "read() failed " 132 "on %s, error=%d", TEMP_FILE, errno); 133 } else { 134 /* 135 * Check if read byte is the expected character. 136 * For pos 4 ---> 'e' 137 */ 138 if (read_buf[0] != 'e') { 139 tst_resm(TFAIL, "Incorrect data read " 140 "from file %s", TEMP_FILE); 141 } else { 142 tst_resm(TPASS, "Functionality " 143 "of lseek() on %s " 144 "successful", TEMP_FILE); 145 } 146 } 147 } 148 149 cleanup(); 150 tst_exit(); 151 } 152 153 /* 154 * setup() - performs all ONE TIME setup for this test. 155 * Create a temporary directory and change directory to it. 156 * Create a test file under temporary directory and write some 157 * data into it. 158 */ 159 void setup(void) 160 { 161 char write_buf[BUFSIZ]; /* buffer to hold data */ 162 163 tst_sig(NOFORK, DEF_HANDLER, cleanup); 164 165 TEST_PAUSE; 166 167 tst_tmpdir(); 168 169 /* Get the data to be written to temporary file */ 170 strcpy(write_buf, "abcdefg"); 171 172 /* Creat/open a temporary file under above directory */ 173 if ((fildes = open(TEMP_FILE, O_RDWR | O_CREAT, FILE_MODE)) == -1) { 174 tst_brkm(TBROK, cleanup, 175 "open(%s, O_RDWR|O_CREAT, %#o) Failed, errno=%d :%s", 176 TEMP_FILE, FILE_MODE, errno, strerror(errno)); 177 } 178 179 /* Write data into temporary file */ 180 if (write(fildes, write_buf, strlen(write_buf)) != strlen(write_buf)) { 181 tst_brkm(TBROK, cleanup, "write(2) on %s Failed, errno=%d : %s", 182 TEMP_FILE, errno, strerror(errno)); 183 } 184 } 185 186 /* 187 * cleanup() - performs all ONE TIME cleanup for this test at 188 * completion or premature exit. 189 * Remove the test directory and testfile created in the setup. 190 */ 191 void cleanup(void) 192 { 193 194 /* Close the temporary file created */ 195 if (close(fildes) < 0) { 196 tst_brkm(TFAIL, NULL, "close(%s) Failed, errno=%d : %s:", 197 TEMP_FILE, errno, strerror(errno)); 198 } 199 200 tst_rmdir(); 201 202 } 203
