| /* |
| * |
| * 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: truncate02 |
| * |
| * Test Description: |
| * Verify that, truncate(2) succeeds to truncate a file to a certain length, |
| * but the attempt to read past the truncated length will fail.$ |
| * |
| * Expected Result: |
| * truncate(2) should return a value 0 and the attempt to read past the |
| * truncated length will fail. In case where the file before truncation was |
| * shorter, the bytes between the old and new should be all zeroes. |
| * |
| * 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> |
| * truncate02 [-c n] [-e] [-f] [-i n] [-I x] [-p x] [-t] |
| * where, -c n : Run n copies concurrently. |
| * -e : Turn on errno logging. |
| * -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 John George |
| * -Ported |
| * |
| * Restrictions: |
| * This test should be run by 'non-super-user' only. |
| * |
| */ |
| |
| #include <sys/types.h> |
| #include <sys/stat.h> |
| #include <sys/fcntl.h> |
| #include <errno.h> |
| #include <string.h> |
| #include <signal.h> |
| |
| #include "test.h" |
| |
| #define TESTFILE "testfile" /* file under test */ |
| #define FILE_MODE S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH |
| #define BUF_SIZE 256 /* buffer size */ |
| #define FILE_SIZE 1024 /* test file size */ |
| #define TRUNC_LEN1 256 /* truncation length */ |
| #define TRUNC_LEN2 512 /* truncation length */ |
| |
| TCID_DEFINE(truncate02); |
| int TST_TOTAL = 1; /* Total number of test conditions */ |
| int fd; /* file descriptor of testfile */ |
| char tst_buff[BUF_SIZE]; /* buffer to hold testfile contents */ |
| |
| void setup(); /* setup function for the test */ |
| void cleanup(); /* cleanup function for the test */ |
| |
| int main(int ac, char **av) |
| { |
| struct stat stat_buf; /* stat(2) struct contents */ |
| int lc, i; |
| const char *msg; |
| off_t file_length2; /* test file length */ |
| off_t file_length1; /* test file length */ |
| int rbytes; /* bytes read from testfile */ |
| int read_len = 0; /* total no. of bytes read from testfile */ |
| int err_flag = 0; /* error indicator flag */ |
| |
| msg = parse_opts(ac, av, NULL, NULL); |
| if (msg != NULL) { |
| tst_brkm(TBROK, NULL, "OPTION PARSING ERROR - %s", msg); |
| |
| } |
| |
| setup(); |
| |
| for (lc = 0; TEST_LOOPING(lc); lc++) { |
| |
| tst_count = 0; |
| |
| /* |
| * Call truncate(2) to truncate a test file to a |
| * specified length (TRUNC_LEN1). |
| */ |
| TEST(truncate(TESTFILE, TRUNC_LEN1)); |
| |
| if (TEST_RETURN == -1) { |
| tst_resm(TFAIL, |
| "truncate(%s, %d) Failed, errno=%d : %s", |
| TESTFILE, TRUNC_LEN1, TEST_ERRNO, |
| strerror(TEST_ERRNO)); |
| } else { |
| /* |
| * Get the testfile information using |
| * stat(2). |
| */ |
| if (stat(TESTFILE, &stat_buf) < 0) { |
| tst_brkm(TFAIL, cleanup, "stat(2) of " |
| "%s failed after 1st truncate, " |
| "error:%d", TESTFILE, errno); |
| } |
| file_length1 = stat_buf.st_size; |
| |
| /* |
| * Set the file pointer of testfile to the |
| * beginning of the file. |
| */ |
| if (lseek(fd, 0, SEEK_SET) < 0) { |
| tst_brkm(TFAIL, cleanup, "lseek(2) on " |
| "%s failed after 1st truncate, " |
| "error:%d", TESTFILE, errno); |
| } |
| |
| /* Read the testfile from the beginning. */ |
| while ((rbytes = read(fd, tst_buff, |
| sizeof(tst_buff))) > 0) { |
| read_len += rbytes; |
| } |
| |
| /* |
| * Execute truncate(2) again to truncate |
| * testfile to a size TRUNC_LEN2. |
| */ |
| TEST(truncate(TESTFILE, TRUNC_LEN2)); |
| |
| if (TEST_RETURN == -1) { |
| tst_resm(TFAIL, "truncate of %s to " |
| "size %d Failed, errno=%d : %s", |
| TESTFILE, TRUNC_LEN2, |
| TEST_ERRNO, |
| strerror(TEST_ERRNO)); |
| } |
| |
| /* |
| * Get the testfile information using |
| * stat(2) |
| */ |
| if (stat(TESTFILE, &stat_buf) < 0) { |
| tst_brkm(TFAIL, cleanup, "stat(2) of " |
| "%s failed after 2nd truncate, " |
| "error:%d", TESTFILE, errno); |
| } |
| file_length2 = stat_buf.st_size; |
| |
| /* |
| * Set the file pointer of testfile to the |
| * offset TRUNC_LEN1 of testfile. |
| */ |
| if (lseek(fd, TRUNC_LEN1, SEEK_SET) < 0) { |
| tst_brkm(TFAIL, cleanup, "lseek(2) on " |
| "%s failed after 2nd truncate, " |
| "error:%d", TESTFILE, errno); |
| } |
| |
| /* Read the testfile contents till EOF */ |
| while ((rbytes = read(fd, tst_buff, |
| sizeof(tst_buff))) > 0) { |
| for (i = 0; i < rbytes; i++) { |
| if (tst_buff[i] != 0) { |
| err_flag++; |
| } |
| } |
| } |
| |
| /* |
| * Check for expected size of testfile after |
| * issuing truncate(2) on it. |
| */ |
| if ((file_length1 != TRUNC_LEN1) || |
| (file_length2 != TRUNC_LEN2) || |
| (read_len != TRUNC_LEN1) || |
| (err_flag != 0)) { |
| tst_resm(TFAIL, "Functionality of " |
| "truncate(2) on %s Failed", |
| TESTFILE); |
| } else { |
| tst_resm(TPASS, |
| "Functionality of truncate(2) " |
| "on %s successful", TESTFILE); |
| } |
| } |
| tst_count++; /* incr. TEST_LOOP counter */ |
| } |
| |
| cleanup(); |
| tst_exit(); |
| } |
| |
| /* |
| * void |
| * 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. |
| */ |
| void setup(void) |
| { |
| int i; |
| int wbytes; /* bytes written to testfile */ |
| int write_len = 0; /* total no. of bytes written to testfile */ |
| |
| tst_sig(FORK, DEF_HANDLER, cleanup); |
| |
| /* Pause if that option was specified |
| * TEST_PAUSE contains the code to fork the test with the -i option. |
| * You want to make sure you do this before you create your temporary |
| * directory. |
| */ |
| TEST_PAUSE; |
| |
| tst_tmpdir(); |
| |
| /* Fill the test buffer with the known data */ |
| for (i = 0; i < BUF_SIZE; i++) { |
| tst_buff[i] = 'a'; |
| } |
| |
| /* Creat a testfile and write some data into it */ |
| if ((fd = open(TESTFILE, O_RDWR | O_CREAT, FILE_MODE)) == -1) { |
| tst_brkm(TBROK, cleanup, |
| "open(%s, O_RDWR|O_CREAT, %o) Failed, errno=%d : %s", |
| TESTFILE, FILE_MODE, errno, strerror(errno)); |
| } |
| |
| /* Write to the file 1k data from the buffer */ |
| while (write_len < FILE_SIZE) { |
| if ((wbytes = write(fd, tst_buff, sizeof(tst_buff))) <= 0) { |
| tst_brkm(TBROK, cleanup, |
| "write(2) on %s Failed, errno=%d : %s", |
| TESTFILE, errno, strerror(errno)); |
| } else { |
| write_len += wbytes; |
| } |
| } |
| } |
| |
| /* |
| * void |
| * cleanup() - performs all ONE TIME cleanup for this test at |
| * completion or premature exit. |
| * Close the temporary file opened for reading/writing. |
| * Remove the test directory and testfile created in the setup. |
| */ |
| void cleanup(void) |
| { |
| |
| /* Close the testfile after writing data into it */ |
| if (close(fd) == -1) { |
| tst_brkm(TFAIL, NULL, |
| "close(%s) Failed, errno=%d : %s", |
| TESTFILE, errno, strerror(errno)); |
| } |
| |
| tst_rmdir(); |
| |
| } |