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: pwrite01 22 * 23 * Test Description: 24 * Verify the functionality of pwrite() by writing known data using pwrite() 25 * to the file at various specified offsets and later read from the file from 26 * various specified offsets, comparing the data written aganist the data 27 * read using read(). 28 * 29 * Expected Result: 30 * pwrite() should succeed to write the expected no. of bytes of data and 31 * the data written at specified offsets should match aganist the data read 32 * from that offset. 33 * 34 * Algorithm: 35 * Setup: 36 * Setup signal handling. 37 * Create temporary directory. 38 * Pause for SIGUSR1 if option specified. 39 * 40 * Test: 41 * Loop if the proper options are given. 42 * Execute system call 43 * Check return code, if system call failed (return=-1) 44 * Log the errno and Issue a FAIL message. 45 * Otherwise, 46 * Verify the Functionality of system call 47 * if successful, 48 * Issue Functionality-Pass message. 49 * Otherwise, 50 * Issue Functionality-Fail message. 51 * Cleanup: 52 * Print errno log and/or timing stats if options given 53 * Delete the temporary directory created. 54 * 55 * Usage: <for command-line> 56 * pwrite01 [-c n] [-f] [-i n] [-I x] [-P x] [-t] 57 * where, -c n : Run n copies concurrently. 58 * -f : Turn off functionality Testing. 59 * -i n : Execute test n times. 60 * -I x : Execute test for x seconds. 61 * -P x : Pause for x seconds between iterations. 62 * -t : Turn on syscall timing. 63 * 64 * HISTORY 65 * 07/2001 Ported by Wayne Boyer 66 * 67 * RESTRICTIONS: 68 * None. 69 */ 70 71 #define _XOPEN_SOURCE 500 72 73 #include <errno.h> 74 #include <unistd.h> 75 #include <fcntl.h> 76 #include <stdlib.h> 77 #include <string.h> 78 #include <inttypes.h> 79 80 #include "test.h" 81 82 #define _XOPEN_SOURCE 500 83 #define TEMPFILE "pwrite_file" 84 #define K1 1024 85 #define K2 (K1 * 2) 86 #define K3 (K1 * 3) 87 #define K4 (K1 * 4) 88 #define NBUFS 4 89 90 char *TCID = "pwrite01"; 91 int TST_TOTAL = 1; 92 int fildes; /* file descriptor for tempfile */ 93 char *write_buf[NBUFS]; /* buffer to hold data to be written */ 94 95 void setup(); /* Main setup function of test */ 96 void cleanup(); /* cleanup function for the test */ 97 void l_seek(int, off_t, int, off_t); /* function to call lseek() */ 98 void init_buffers(); /* function to initialize/allocate buffers */ 99 void check_file_contents(); /* function to verify the contents of file */ 100 101 int main(int ac, char **av) 102 { 103 int lc; 104 int nwrite; /* no. of bytes written by pwrite() */ 105 106 tst_parse_opts(ac, av, NULL, NULL); 107 108 setup(); 109 110 for (lc = 0; TEST_LOOPING(lc); lc++) { 111 112 tst_count = 0; 113 114 /* 115 * Call pwrite() to write K1 bytes of data (0's) at offset 0 116 * of temporary file 117 */ 118 nwrite = pwrite(fildes, write_buf[0], K1, 0); 119 120 /* Check for the return value of pwrite() */ 121 if (nwrite != K1) { 122 tst_resm(TFAIL, "pwrite() at offset 0 failed, errno=%d " 123 ": %s", errno, strerror(errno)); 124 continue; 125 } 126 127 /* We should still be at offset 0. */ 128 l_seek(fildes, 0, SEEK_CUR, 0); 129 130 /* 131 * Now, lseek() to a non K boundary, 132 * just to be different. 133 */ 134 l_seek(fildes, K1 / 2, SEEK_SET, K1 / 2); 135 136 /* 137 * Again, pwrite() K1 of data (2's) at offset K2 of 138 * temporary file. 139 */ 140 nwrite = pwrite(fildes, write_buf[2], K1, K2); 141 if (nwrite != K1) { 142 tst_resm(TFAIL, "pwrite() failed to " 143 "write at %d off. on %s, errno=%d : %s", 144 K2, TEMPFILE, errno, strerror(errno)); 145 continue; 146 } 147 148 /* We should still be at our non K boundary. */ 149 l_seek(fildes, 0, SEEK_CUR, K1 / 2); 150 151 /* lseek() to an offset of K3. */ 152 l_seek(fildes, K3, SEEK_SET, K3); 153 154 /* 155 * Using write(), write of K1 of data (3's) which 156 * should take place at an offset of K3, 157 * moving the file pointer to K4. 158 */ 159 nwrite = write(fildes, write_buf[3], K1); 160 if (nwrite != K1) { 161 tst_resm(TFAIL, "write() failed: nwrite=%d, errno=%d : " 162 "%s", nwrite, errno, strerror(errno)); 163 continue; 164 } 165 166 /* We should be at offset K4. */ 167 l_seek(fildes, 0, SEEK_CUR, K4); 168 169 /* Again, pwrite() K1 of data (1's) at offset K1. */ 170 nwrite = pwrite(fildes, write_buf[1], K1, K1); 171 if (nwrite != K1) { 172 tst_resm(TFAIL, "pwrite() failed to write at " 173 "%d off. on %s, errno=%d : %s", 174 K1, TEMPFILE, errno, strerror(errno)); 175 continue; 176 } 177 178 /* 179 * Check the contents of temporary file 180 * to which data written using pwrite(). 181 * Compare the data read with the original 182 * write_buf[] contents. 183 */ 184 check_file_contents(); 185 186 /* reset to offset 0 in case we are looping */ 187 l_seek(fildes, 0, SEEK_SET, 0); 188 189 } 190 191 cleanup(); 192 tst_exit(); 193 } 194 195 /* 196 * setup() - performs all ONE TIME setup for this test. 197 * 198 * Initialize/allocate read/write buffers. 199 * Create a temporary directory and a file under it and 200 */ 201 void setup(void) 202 { 203 204 tst_sig(NOFORK, DEF_HANDLER, cleanup); 205 206 TEST_PAUSE; 207 208 /* Allocate/Initialize the write buffer with known data */ 209 init_buffers(); 210 211 tst_tmpdir(); 212 213 /* Creat a temporary file used for mapping */ 214 if ((fildes = open(TEMPFILE, O_RDWR | O_CREAT, 0666)) < 0) { 215 tst_brkm(TBROK, cleanup, "open() on %s Failed, errno=%d : %s", 216 TEMPFILE, errno, strerror(errno)); 217 } 218 } 219 220 /* 221 * init_buffers() - allocate/Initialize write_buf array. 222 * 223 * Allocate write buffer. 224 * Fill the write buffer with the following data like, 225 * write_buf[0] has 0's, write_buf[1] has 1's, write_buf[2] has 2's 226 * write_buf[3] has 3's. 227 */ 228 void init_buffers(void) 229 { 230 int count; /* counter variable for loop */ 231 232 /* Allocate and Initialize write buffer with known data */ 233 for (count = 0; count < NBUFS; count++) { 234 write_buf[count] = malloc(K1); 235 236 if (write_buf[count] == NULL) { 237 tst_brkm(TBROK, NULL, "malloc() failed "); 238 } 239 memset(write_buf[count], count, K1); 240 } 241 } 242 243 /* 244 * l_seek() - local front end to lseek(). 245 * 246 * "checkoff" is the offset at which we believe we should be at. 247 * Used to validate pread/pwrite don't move the offset. 248 */ 249 void l_seek(int fdesc, off_t offset, int whence, off_t checkoff) 250 { 251 off_t offloc; /* offset ret. from lseek() */ 252 253 if ((offloc = lseek(fdesc, offset, whence)) != checkoff) { 254 tst_resm(TWARN, "lseek returned %" PRId64 ", expected %" PRId64, 255 (int64_t) offloc, (int64_t) checkoff); 256 tst_brkm(TBROK | TERRNO, cleanup, "lseek() on %s Failed", 257 TEMPFILE); 258 } 259 } 260 261 /* 262 * check_file_contents() - Check the contents of the file we wrote with 263 * pwrite()'s. 264 * The contents of the file are verified by using a plain read() and 265 * Compare the data read with the original write_buf[] contents. 266 */ 267 void check_file_contents(void) 268 { 269 int count, err_flg = 0; /* index variable and error flag */ 270 int nread; /* return value of read() */ 271 off_t offloc; /* offset. ret. by lseek() */ 272 char *read_buf; /* buffer to hold read data */ 273 274 /* Allocate space for read buffer */ 275 read_buf = malloc(K1); 276 if (read_buf == NULL) { 277 tst_brkm(TBROK, cleanup, "malloc() failed on read buffer"); 278 } 279 280 /* Seek to app. location of file and read the data, compare it */ 281 for (count = 0; count < NBUFS; count++) { 282 /* Seek to specified offset position from beginning */ 283 offloc = lseek(fildes, count * K1, SEEK_SET); 284 if (offloc != (count * K1)) { 285 tst_brkm(TBROK | TERRNO, cleanup, 286 "lseek() failed: offloc=%" PRId64, 287 (int64_t) offloc); 288 } 289 290 /* Read the data from file into a buffer */ 291 nread = read(fildes, read_buf, K1); 292 if (nread != K1) { 293 tst_brkm(TBROK | TERRNO, cleanup, 294 "read() failed: nread=%d", nread); 295 } 296 297 /* Compare the read data with the data written using pwrite */ 298 if (memcmp(write_buf[count], read_buf, K1) != 0) { 299 tst_resm(TFAIL, "read/write buffer data mismatch"); 300 err_flg++; 301 } 302 } 303 304 /* If no erros, Test successful */ 305 if (!err_flg) { 306 tst_resm(TPASS, "Functionality of pwrite() successful"); 307 } 308 309 /* Release the memory allocated before return */ 310 free(read_buf); 311 } 312 313 /* 314 * cleanup() - performs all ONE TIME cleanup for this test at 315 * completion or premature exit. 316 * 317 * Deallocate the memory allocated to write buffer. 318 * Close the temporary file. 319 * Remove the temporary directory created. 320 */ 321 void cleanup(void) 322 { 323 int count; 324 325 /* Free the memory allocated for the write buffer */ 326 for (count = 0; count < NBUFS; count++) { 327 free(write_buf[count]); 328 } 329 330 /* Close the temporary file */ 331 if (close(fildes) < 0) { 332 tst_brkm(TBROK, NULL, "close() on %s Failed, errno=%d : %s", 333 TEMPFILE, errno, strerror(errno)); 334 } 335 336 tst_rmdir(); 337 338 } 339
