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 #include "safe_macros.h" 82 83 #define _XOPEN_SOURCE 500 84 #define TEMPFILE "pwrite_file" 85 #define K1 1024 86 #define K2 (K1 * 2) 87 #define K3 (K1 * 3) 88 #define K4 (K1 * 4) 89 #define NBUFS 4 90 91 char *TCID = "pwrite01"; 92 int TST_TOTAL = 1; 93 int fildes; /* file descriptor for tempfile */ 94 char *write_buf[NBUFS]; /* buffer to hold data to be written */ 95 96 void setup(); /* Main setup function of test */ 97 void cleanup(); /* cleanup function for the test */ 98 void l_seek(int, off_t, int, off_t); /* function to call lseek() */ 99 void init_buffers(); /* function to initialize/allocate buffers */ 100 void check_file_contents(); /* function to verify the contents of file */ 101 102 int main(int ac, char **av) 103 { 104 int lc; 105 int nwrite; /* no. of bytes written by pwrite() */ 106 107 tst_parse_opts(ac, av, NULL, NULL); 108 109 setup(); 110 111 for (lc = 0; TEST_LOOPING(lc); lc++) { 112 113 tst_count = 0; 114 115 /* 116 * Call pwrite() to write K1 bytes of data (0's) at offset 0 117 * of temporary file 118 */ 119 nwrite = pwrite(fildes, write_buf[0], K1, 0); 120 121 /* Check for the return value of pwrite() */ 122 if (nwrite != K1) { 123 tst_resm(TFAIL, "pwrite() at offset 0 failed, errno=%d " 124 ": %s", errno, strerror(errno)); 125 continue; 126 } 127 128 /* We should still be at offset 0. */ 129 l_seek(fildes, 0, SEEK_CUR, 0); 130 131 /* 132 * Now, lseek() to a non K boundary, 133 * just to be different. 134 */ 135 l_seek(fildes, K1 / 2, SEEK_SET, K1 / 2); 136 137 /* 138 * Again, pwrite() K1 of data (2's) at offset K2 of 139 * temporary file. 140 */ 141 nwrite = pwrite(fildes, write_buf[2], K1, K2); 142 if (nwrite != K1) { 143 tst_resm(TFAIL, "pwrite() failed to " 144 "write at %d off. on %s, errno=%d : %s", 145 K2, TEMPFILE, errno, strerror(errno)); 146 continue; 147 } 148 149 /* We should still be at our non K boundary. */ 150 l_seek(fildes, 0, SEEK_CUR, K1 / 2); 151 152 /* lseek() to an offset of K3. */ 153 l_seek(fildes, K3, SEEK_SET, K3); 154 155 /* 156 * Using write(), write of K1 of data (3's) which 157 * should take place at an offset of K3, 158 * moving the file pointer to K4. 159 */ 160 nwrite = write(fildes, write_buf[3], K1); 161 if (nwrite != K1) { 162 tst_resm(TFAIL, "write() failed: nwrite=%d, errno=%d : " 163 "%s", nwrite, errno, strerror(errno)); 164 continue; 165 } 166 167 /* We should be at offset K4. */ 168 l_seek(fildes, 0, SEEK_CUR, K4); 169 170 /* Again, pwrite() K1 of data (1's) at offset K1. */ 171 nwrite = pwrite(fildes, write_buf[1], K1, K1); 172 if (nwrite != K1) { 173 tst_resm(TFAIL, "pwrite() failed to write at " 174 "%d off. on %s, errno=%d : %s", 175 K1, TEMPFILE, errno, strerror(errno)); 176 continue; 177 } 178 179 /* 180 * Check the contents of temporary file 181 * to which data written using pwrite(). 182 * Compare the data read with the original 183 * write_buf[] contents. 184 */ 185 check_file_contents(); 186 187 /* reset to offset 0 in case we are looping */ 188 l_seek(fildes, 0, SEEK_SET, 0); 189 190 } 191 192 cleanup(); 193 tst_exit(); 194 } 195 196 /* 197 * setup() - performs all ONE TIME setup for this test. 198 * 199 * Initialize/allocate read/write buffers. 200 * Create a temporary directory and a file under it and 201 */ 202 void setup(void) 203 { 204 205 tst_sig(NOFORK, DEF_HANDLER, cleanup); 206 207 TEST_PAUSE; 208 209 /* Allocate/Initialize the write buffer with known data */ 210 init_buffers(); 211 212 tst_tmpdir(); 213 214 /* Creat a temporary file used for mapping */ 215 if ((fildes = open(TEMPFILE, O_RDWR | O_CREAT, 0666)) < 0) { 216 tst_brkm(TBROK, cleanup, "open() on %s Failed, errno=%d : %s", 217 TEMPFILE, errno, strerror(errno)); 218 } 219 } 220 221 /* 222 * init_buffers() - allocate/Initialize write_buf array. 223 * 224 * Allocate write buffer. 225 * Fill the write buffer with the following data like, 226 * write_buf[0] has 0's, write_buf[1] has 1's, write_buf[2] has 2's 227 * write_buf[3] has 3's. 228 */ 229 void init_buffers(void) 230 { 231 int count; /* counter variable for loop */ 232 233 /* Allocate and Initialize write buffer with known data */ 234 for (count = 0; count < NBUFS; count++) { 235 write_buf[count] = malloc(K1); 236 237 if (write_buf[count] == NULL) { 238 tst_brkm(TBROK, NULL, "malloc() failed "); 239 } 240 memset(write_buf[count], count, K1); 241 } 242 } 243 244 /* 245 * l_seek() - local front end to lseek(). 246 * 247 * "checkoff" is the offset at which we believe we should be at. 248 * Used to validate pread/pwrite don't move the offset. 249 */ 250 void l_seek(int fdesc, off_t offset, int whence, off_t checkoff) 251 { 252 off_t offloc; /* offset ret. from lseek() */ 253 254 if ((offloc = lseek(fdesc, offset, whence)) != checkoff) { 255 tst_resm(TWARN, "lseek returned %" PRId64 ", expected %" PRId64, 256 (int64_t) offloc, (int64_t) checkoff); 257 tst_brkm(TBROK | TERRNO, cleanup, "lseek() on %s Failed", 258 TEMPFILE); 259 } 260 } 261 262 /* 263 * check_file_contents() - Check the contents of the file we wrote with 264 * pwrite()'s. 265 * The contents of the file are verified by using a plain read() and 266 * Compare the data read with the original write_buf[] contents. 267 */ 268 void check_file_contents(void) 269 { 270 int count, err_flg = 0; /* index variable and error flag */ 271 int nread; /* return value of read() */ 272 off_t offloc; /* offset. ret. by lseek() */ 273 char *read_buf; /* buffer to hold read data */ 274 275 /* Allocate space for read buffer */ 276 read_buf = malloc(K1); 277 if (read_buf == NULL) { 278 tst_brkm(TBROK, cleanup, "malloc() failed on read buffer"); 279 } 280 281 /* Seek to app. location of file and read the data, compare it */ 282 for (count = 0; count < NBUFS; count++) { 283 /* Seek to specified offset position from beginning */ 284 offloc = lseek(fildes, count * K1, SEEK_SET); 285 if (offloc != (count * K1)) { 286 tst_brkm(TBROK | TERRNO, cleanup, 287 "lseek() failed: offloc=%" PRId64, 288 (int64_t) offloc); 289 } 290 291 /* Read the data from file into a buffer */ 292 nread = read(fildes, read_buf, K1); 293 if (nread != K1) { 294 tst_brkm(TBROK | TERRNO, cleanup, 295 "read() failed: nread=%d", nread); 296 } 297 298 /* Compare the read data with the data written using pwrite */ 299 if (memcmp(write_buf[count], read_buf, K1) != 0) { 300 tst_resm(TFAIL, "read/write buffer data mismatch"); 301 err_flg++; 302 } 303 } 304 305 /* If no erros, Test successful */ 306 if (!err_flg) { 307 tst_resm(TPASS, "Functionality of pwrite() successful"); 308 } 309 310 /* Release the memory allocated before return */ 311 free(read_buf); 312 } 313 314 /* 315 * cleanup() - performs all ONE TIME cleanup for this test at 316 * completion or premature exit. 317 * 318 * Deallocate the memory allocated to write buffer. 319 * Close the temporary file. 320 * Remove the temporary directory created. 321 */ 322 void cleanup(void) 323 { 324 int count; 325 326 /* Free the memory allocated for the write buffer */ 327 for (count = 0; count < NBUFS; count++) { 328 free(write_buf[count]); 329 } 330 331 /* Close the temporary file */ 332 SAFE_CLOSE(NULL, fildes); 333 334 tst_rmdir(); 335 336 } 337
