| /* |
| * |
| * Copyright (c) International Business Machines Corp., 2001 |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License as published by |
| * the Free Software Foundation; either version 2 of the License, or |
| * (at your option) any later version. |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See |
| * the GNU General Public License for more details. |
| * |
| * You should have received a copy of the GNU General Public License |
| * along with this program; if not, write to the Free Software |
| * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| */ |
| |
| /* |
| * Test Name: lseek08 |
| * |
| * Test Description: |
| * Verify that, lseek() call succeeds to set the file pointer position |
| * to the end of the file when 'whence' value set to SEEK_END and any |
| * attempts to read from that position should fail. |
| * |
| * Expected Result: |
| * lseek() should return the offset which is set to the file size measured |
| * in bytes. read() attempt should fail with -1 return value. |
| * $ |
| * Algorithm: |
| * Setup: |
| * Setup signal handling. |
| * Create temporary directory. |
| * Pause for SIGUSR1 if option specified. |
| * |
| * Test: |
| * Loop if the proper options are given. |
| * Execute system call |
| * Check return code, if system call failed (return=-1) |
| * Log the errno and Issue a FAIL message. |
| * Otherwise, |
| * Verify the Functionality of system call |
| * if successful, |
| * Issue Functionality-Pass message. |
| * Otherwise, |
| * Issue Functionality-Fail message. |
| * Cleanup: |
| * Print errno log and/or timing stats if options given |
| * Delete the temporary directory created. |
| * |
| * Usage: <for command-line> |
| * lseek08 [-c n] [-f] [-i n] [-I x] [-P x] [-t] |
| * where, -c n : Run n copies concurrently. |
| * -f : Turn off functionality Testing. |
| * -i n : Execute test n times. |
| * -I x : Execute test for x seconds. |
| * -P x : Pause for x seconds between iterations. |
| * -t : Turn on syscall timing. |
| * |
| * HISTORY |
| * 07/2001 Ported by Wayne Boyer |
| * |
| * RESTRICTIONS: |
| * None. |
| */ |
| |
| #include <stdio.h> |
| #include <unistd.h> |
| #include <sys/types.h> |
| #include <errno.h> |
| #include <fcntl.h> |
| #include <utime.h> |
| #include <string.h> |
| #include <sys/stat.h> |
| #include <signal.h> |
| |
| #include "test.h" |
| #include "usctest.h" |
| |
| #define TEMP_FILE "tmp_file" |
| #define FILE_MODE S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH |
| |
| char *TCID = "lseek08"; /* Test program identifier. */ |
| int TST_TOTAL = 1; /* Total number of test cases. */ |
| int fildes; /* file handle for temp file */ |
| size_t file_size; /* size of the temporary file */ |
| |
| void setup(); /* Main setup function of test */ |
| void cleanup(); /* cleanup function for the test */ |
| |
| int main(int ac, char **av) |
| { |
| int lc; |
| char *msg; |
| char read_buf[1]; /* data read from temp. file */ |
| |
| /* Parse standard options given to run the test. */ |
| if ((msg = parse_opts(ac, av, NULL, NULL)) != NULL) |
| tst_brkm(TBROK, NULL, "OPTION PARSING ERROR - %s", msg); |
| |
| setup(); |
| |
| for (lc = 0; TEST_LOOPING(lc); lc++) { |
| |
| Tst_count = 0; |
| |
| /* |
| * Invoke lseek(2) to move the read/write file |
| * pointer/handle to the END of the file. |
| */ |
| TEST(lseek(fildes, 0, SEEK_END)); |
| |
| if (TEST_RETURN == -1) { |
| tst_resm(TFAIL|TTERRNO, |
| "lseek of %s failed", TEMP_FILE); |
| continue; |
| } |
| /* |
| * Perform functional verification if test |
| * executed without (-f) option. |
| */ |
| if (STD_FUNCTIONAL_TEST) { |
| /* |
| * Check if the return value from lseek(2) |
| * is equal to the file_size. |
| */ |
| if (TEST_RETURN != file_size) { |
| tst_resm(TFAIL, "lseek() returned incorrect " |
| "value %ld, expected %zu", |
| TEST_RETURN, file_size); |
| continue; |
| } |
| /* |
| * The return value is okay, now attempt to read data |
| * from the file. This should fail as the file pointer |
| * should be pointing to END OF FILE. |
| */ |
| read_buf[0] = '\0'; |
| if (read(fildes, &read_buf, sizeof(read_buf)) > 0) { |
| tst_resm(TFAIL, "read() successful on %s", |
| TEMP_FILE); |
| } else { |
| tst_resm(TPASS, "Functionality of lseek() on " |
| "%s successful", TEMP_FILE); |
| } |
| } else { |
| tst_resm(TPASS, "call succeeded"); |
| } |
| } |
| |
| cleanup(); |
| tst_exit(); |
| |
| } |
| |
| /* |
| * setup() - performs all ONE TIME setup for this test. |
| * Create a temporary directory and change directory to it. |
| * Create a test file under temporary directory and write some |
| * data into it. |
| * Get the size of the file using fstat(). |
| */ |
| void setup() |
| { |
| struct stat stat_buf; /* struct. buffer for stat(2) */ |
| char write_buf[BUFSIZ]; /* buffer to hold data */ |
| |
| tst_sig(NOFORK, DEF_HANDLER, cleanup); |
| |
| TEST_PAUSE; |
| |
| tst_tmpdir(); |
| |
| /* Get the data to be written to temporary file */ |
| strcpy(write_buf, "abcdefg\n"); |
| |
| /* Creat/open a temporary file under above directory */ |
| if ((fildes = open(TEMP_FILE, O_RDWR | O_CREAT, FILE_MODE)) == -1) { |
| tst_brkm(TBROK|TERRNO, cleanup, |
| "open(%s, O_RDWR|O_CREAT, %#o) failed", |
| TEMP_FILE, FILE_MODE); |
| } |
| |
| /* Write data into temporary file */ |
| if (write(fildes, write_buf, strlen(write_buf)) <= 0) { |
| tst_brkm(TBROK|TERRNO, cleanup, |
| "writing to %s failed", TEMP_FILE); |
| } |
| |
| /* Get the size of the file using fstat */ |
| if (fstat(fildes, &stat_buf) < 0) { |
| tst_brkm(TBROK|TERRNO, cleanup, |
| "fstat of %s failed", TEMP_FILE); |
| } |
| |
| file_size = stat_buf.st_size; |
| } |
| |
| /* |
| * cleanup() - performs all ONE TIME cleanup for this test at |
| * completion or premature exit. |
| * Remove the test directory and testfile created in the setup. |
| */ |
| void cleanup() |
| { |
| /* |
| * print timing stats if that option was specified. |
| * print errno log if that option was specified. |
| */ |
| TEST_CLEANUP; |
| |
| /* Close the temporary file created */ |
| if (close(fildes) < 0) { |
| tst_brkm(TFAIL, NULL, |
| "close(%s) Failed, errno=%d : %s:", |
| TEMP_FILE, errno, strerror(errno)); |
| } |
| |
| tst_rmdir(); |
| |
| } |