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: llseek01 22 * 23 * Test Description: 24 * Verify that, llseek() call succeeds to set the file pointer position 25 * to an offset larger than file size. Also, verify that any attempt 26 * to write to this location fails. 27 * 28 * Expected result: 29 * llseek() should return the offset from the beginning of the file measured 30 * in bytes. Attempt to write to the location ( > file size) should fail. 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 * llseek01 [-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 #ifndef _GNU_SOURCE 70 #define _GNU_SOURCE 71 #endif 72 73 #include <unistd.h> 74 #include <errno.h> 75 #include <unistd.h> 76 #include <fcntl.h> 77 #include <utime.h> 78 #include <string.h> 79 #include <signal.h> 80 #include <sys/resource.h> 81 #include <sys/stat.h> 82 #include <sys/types.h> 83 #include <inttypes.h> 84 85 #include "test.h" 86 #include "safe_macros.h" 87 88 #define TEMP_FILE "tmp_file" 89 #define FILE_MODE 0644 90 91 char *TCID = "llseek01"; 92 int TST_TOTAL = 1; 93 char write_buff[BUFSIZ]; /* buffer to hold data */ 94 int fildes; /* file handle for temp file */ 95 96 void setup(); /* Main setup function of test */ 97 void cleanup(); /* cleanup function for the test */ 98 99 int main(int ac, char **av) 100 { 101 int lc; 102 loff_t offset; /* Ret value from llseek */ 103 104 tst_parse_opts(ac, av, NULL, NULL); 105 106 offset = -1; 107 108 setup(); 109 110 for (lc = 0; TEST_LOOPING(lc); lc++) { 111 112 tst_count = 0; 113 114 /* 115 * set file size limit, seek to a file using llseek. 116 */ 117 TEST(lseek64(fildes, (loff_t) (80 * BUFSIZ), SEEK_SET)); 118 119 if (TEST_RETURN == (loff_t) - 1) { 120 tst_resm(TFAIL, "llseek on (%s) Failed, errno=%d : %s", 121 TEMP_FILE, TEST_ERRNO, strerror(TEST_ERRNO)); 122 continue; 123 } 124 125 if (TEST_RETURN != (loff_t) (80 * BUFSIZ)) { 126 tst_resm(TFAIL, "llseek() returned incorrect " 127 "value %" PRId64 ", expected %d", 128 (int64_t) offset, BUFSIZ); 129 continue; 130 } 131 132 /* 133 * llseek() successful. Now attempt to write past 134 * file size limit. 135 */ 136 if (write(fildes, write_buff, BUFSIZ) != -1) { 137 tst_brkm(TFAIL, cleanup, "write successful " 138 "after file size limit"); 139 } 140 141 /* Seeking to end of last valid write */ 142 offset = lseek64(fildes, (loff_t) BUFSIZ, SEEK_SET); 143 if (offset != (loff_t) BUFSIZ) { 144 tst_brkm(TFAIL, cleanup, 145 "llseek under file size limit"); 146 } 147 148 /* 149 * llseek() successful. Now, attempt to write to 150 * file size limit. 151 */ 152 if (write(fildes, write_buff, BUFSIZ) != BUFSIZ) { 153 tst_brkm(TFAIL, cleanup, "write failed to " 154 "write to file size limit"); 155 } 156 157 /* 158 * Again, attempt to write past file size limit. 159 */ 160 if (write(fildes, write_buff, BUFSIZ) != -1) { 161 tst_brkm(TFAIL, cleanup, "write past file " 162 "size limit successful"); 163 } 164 165 tst_resm(TPASS, "Functionality of llseek() on %s " 166 "successful", TEMP_FILE); 167 } 168 169 cleanup(); 170 tst_exit(); 171 } 172 173 void setup(void) 174 { 175 struct sigaction act; /* struct. to hold signal */ 176 struct rlimit rlp; /* resource for file size limit */ 177 178 tst_sig(NOFORK, DEF_HANDLER, cleanup); 179 180 TEST_PAUSE; 181 182 act.sa_handler = SIG_IGN; 183 act.sa_flags = 0; 184 sigemptyset(&act.sa_mask); 185 if (sigaction(SIGXFSZ, &act, NULL) == -1) { 186 tst_brkm(TFAIL, NULL, "sigaction() Failed to ignore SIGXFSZ"); 187 } 188 189 tst_tmpdir(); 190 191 /* Set limit low, argument is # bytes */ 192 rlp.rlim_cur = rlp.rlim_max = 2 * BUFSIZ; 193 194 if (setrlimit(RLIMIT_FSIZE, &rlp) == -1) 195 tst_brkm(TBROK, cleanup, 196 "Cannot set max. file size using setrlimit"); 197 198 /* Creat/open a temporary file under above directory */ 199 if ((fildes = open(TEMP_FILE, O_RDWR | O_CREAT, FILE_MODE)) == -1) { 200 tst_brkm(TBROK, cleanup, 201 "open(%s, O_RDWR|O_CREAT, 0644) Failed, errno=%d :%s", 202 TEMP_FILE, errno, strerror(errno)); 203 } 204 205 SAFE_WRITE(cleanup, 1, fildes, write_buff, BUFSIZ); 206 } 207 208 void cleanup(void) 209 { 210 SAFE_CLOSE(NULL, fildes); 211 212 tst_rmdir(); 213 } 214
