336 lines
9.2 KiB
C
336 lines
9.2 KiB
C
/*
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*
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* Copyright (c) International Business Machines Corp., 2001
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
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* the GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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/*
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* Test Name: truncate02
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*
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* Test Description:
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* Verify that, truncate(2) succeeds to truncate a file to a certain length,
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* but the attempt to read past the truncated length will fail.
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*
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* Expected Result:
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* truncate(2) should return a value 0 and the attempt to read past the
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* truncated length will fail. In case where the file before truncation was
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* shorter, the bytes between the old and new should be all zeroes.
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*
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* Algorithm:
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* Setup:
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* Setup signal handling.
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* Create temporary directory.
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* Pause for SIGUSR1 if option specified.
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*
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* Test:
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* Loop if the proper options are given.
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* Execute system call
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* Check return code, if system call failed (return=-1)
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* Log the errno and Issue a FAIL message.
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* Otherwise,
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* Verify the Functionality of system call
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* if successful,
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* Issue Functionality-Pass message.
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* Otherwise,
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* Issue Functionality-Fail message.
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* Cleanup:
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* Print errno log and/or timing stats if options given
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* Delete the temporary directory created.
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*
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* Usage: <for command-line>
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* truncate02 [-c n] [-e] [-f] [-i n] [-I x] [-p x] [-t]
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* where, -c n : Run n copies concurrently.
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* -e : Turn on errno logging.
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* -f : Turn off functionality Testing.
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* -i n : Execute test n times.
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* -I x : Execute test for x seconds.
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* -P x : Pause for x seconds between iterations.
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* -t : Turn on syscall timing.
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*
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* History
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* 07/2001 John George
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* -Ported
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*
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* Restrictions:
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* This test should be run by 'non-super-user' only.
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*
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*/
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <sys/fcntl.h>
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#include <errno.h>
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#include <string.h>
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#include <signal.h>
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#include "test.h"
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#include "usctest.h"
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#define TESTFILE "testfile" /* file under test */
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#define FILE_MODE S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH
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#define BUF_SIZE 256 /* buffer size */
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#define FILE_SIZE 1024 /* test file size */
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#define TRUNC_LEN1 256 /* truncation length */
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#define TRUNC_LEN2 512 /* truncation length */
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char *TCID="truncate02"; /* Test program identifier. */
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int TST_TOTAL=1; /* Total number of test conditions */
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extern int Tst_count; /* Test Case counter for tst_* routines */
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int fd; /* file descriptor of testfile */
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char tst_buff[BUF_SIZE]; /* buffer to hold testfile contents */
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int exp_enos[]={0};
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void setup(); /* setup function for the test */
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void cleanup(); /* cleanup function for the test */
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int
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main(int ac, char **av)
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{
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struct stat stat_buf; /* stat(2) struct contents */
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int lc, i; /* loop counter */
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const char *msg; /* message returned from parse_opts */
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off_t file_length2; /* test file length */
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off_t file_length1; /* test file length */
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int rbytes; /* bytes read from testfile */
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int read_len = 0; /* total no. of bytes read from testfile */
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int err_flag = 0; /* error indicator flag */
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/* Parse standard options given to run the test. */
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msg = parse_opts(ac, av, (option_t *) NULL, NULL);
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if (msg != (char *) NULL) {
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tst_brkm(TBROK, NULL, "OPTION PARSING ERROR - %s", msg);
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tst_exit();
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}
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/* Perform global setup for test */
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setup();
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/* set the expected errnos... */
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TEST_EXP_ENOS(exp_enos);
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/* Check looping state if -i option given */
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for (lc = 0; TEST_LOOPING(lc); lc++) {
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/* Reset Tst_count in case we are looping. */
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Tst_count = 0;
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/*
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* Call truncate(2) to truncate a test file to a
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* specified length (TRUNC_LEN1).
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*/
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TEST(truncate(TESTFILE, TRUNC_LEN1));
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/* check return code of truncate(2) */
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if (TEST_RETURN == -1) {
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TEST_ERROR_LOG(TEST_ERRNO);
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tst_resm(TFAIL, \
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"truncate(%s, %d) Failed, errno=%d : %s",
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TESTFILE, TRUNC_LEN1, TEST_ERRNO,
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strerror(TEST_ERRNO));
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} else {
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/*
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* Perform functional verification if test
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* executed without (-f) option.
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*/
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if (STD_FUNCTIONAL_TEST) {
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/*
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* Get the testfile information using
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* stat(2).
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*/
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if (stat(TESTFILE, &stat_buf) < 0) {
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tst_brkm(TFAIL, cleanup, "stat(2) of "
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"%s failed after 1st truncate, "
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"error:%d", TESTFILE, errno);
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/*NOTREACHED*/
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}
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file_length1 = stat_buf.st_size;
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/*
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* Set the file pointer of testfile to the
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* beginning of the file.
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*/
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if (lseek(fd, 0, SEEK_SET) < 0) {
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tst_brkm(TFAIL, cleanup, "lseek(2) on "
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"%s failed after 1st truncate, "
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"error:%d", TESTFILE, errno);
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/*NOTREACHED*/
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}
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/* Read the testfile from the beginning. */
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while ((rbytes = read(fd, tst_buff, \
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sizeof(tst_buff))) > 0) {
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read_len += rbytes;
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}
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/*
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* Execute truncate(2) again to truncate
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* testfile to a size TRUNC_LEN2.
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*/
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TEST(truncate(TESTFILE, TRUNC_LEN2));
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/* check return code of truncate(2) */
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if (TEST_RETURN == -1) {
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TEST_ERROR_LOG(TEST_ERRNO);
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tst_resm(TFAIL, "truncate of %s to "
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"size %d Failed, errno=%d : %s",
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TESTFILE, TRUNC_LEN2,
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TEST_ERRNO,
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strerror(TEST_ERRNO));
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}
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/*
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* Get the testfile information using
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* stat(2)
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*/
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if (stat(TESTFILE, &stat_buf) < 0) {
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tst_brkm(TFAIL, cleanup, "stat(2) of "
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"%s failed after 2nd truncate, "
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"error:%d", TESTFILE, errno);
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/*NOTREACHED*/
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}
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file_length2 = stat_buf.st_size;
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/*
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* Set the file pointer of testfile to the
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* offset TRUNC_LEN1 of testfile.
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*/
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if (lseek(fd, TRUNC_LEN1, SEEK_SET) < 0) {
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tst_brkm(TFAIL, cleanup, "lseek(2) on "
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"%s failed after 2nd truncate, "
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"error:%d", TESTFILE, errno);
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/*NOTREACHED*/
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}
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/* Read the testfile contents till EOF */
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while((rbytes = read(fd, tst_buff, \
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sizeof(tst_buff))) > 0) {
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for (i = 0; i < rbytes; i++) {
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if (tst_buff[i] != 0) {
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err_flag++;
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}
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}
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}
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/*
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* Check for expected size of testfile after
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* issuing truncate(2) on it.
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*/
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if ((file_length1 != TRUNC_LEN1) || \
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(file_length2 != TRUNC_LEN2) || \
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(read_len != TRUNC_LEN1) || \
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(err_flag != 0)) {
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tst_resm(TFAIL, "Functionality of "
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"truncate(2) on %s Failed",
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TESTFILE);
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} else {
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tst_resm(TPASS, \
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"Functionality of truncate(2) "
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"on %s successful", TESTFILE);
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}
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} else {
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tst_resm(TPASS, "%s call succeeded", TCID);
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}
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}
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Tst_count++; /* incr. TEST_LOOP counter */
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} /* End for TEST_LOOPING */
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/* Call cleanup() to undo setup done for the test. */
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cleanup();
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/*NOTREACHED*/
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} /* End main */
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/*
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* void
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* setup() - performs all ONE TIME setup for this test.
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* Create a temporary directory and change directory to it.
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* Create a test file under temporary directory and write some
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* data into it.
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*/
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void
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setup()
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{
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int i; /* counter variable */
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int wbytes; /* bytes written to testfile */
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int write_len = 0; /* total no. of bytes written to testfile */
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/* capture signals */
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tst_sig(FORK, DEF_HANDLER, cleanup);
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/* Pause if that option was specified
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* TEST_PAUSE contains the code to fork the test with the -i option.
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* You want to make sure you do this before you create your temporary
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* directory.
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*/
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TEST_PAUSE;
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/* make a temp directory and cd to it */
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tst_tmpdir();
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/* Fill the test buffer with the known data */
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for (i = 0; i < BUF_SIZE; i++) {
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tst_buff[i] = 'a';
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}
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/* Creat a testfile and write some data into it */
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if ((fd = open(TESTFILE, O_RDWR|O_CREAT, FILE_MODE)) == -1) {
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tst_brkm(TBROK, cleanup,
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"open(%s, O_RDWR|O_CREAT, %o) Failed, errno=%d : %s",
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TESTFILE, FILE_MODE, errno, strerror(errno));
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/*NOTREACHED*/
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}
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/* Write to the file 1k data from the buffer */
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while (write_len < FILE_SIZE) {
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if ((wbytes = write(fd, tst_buff, sizeof(tst_buff))) <= 0) {
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tst_brkm(TBROK, cleanup,
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"write(2) on %s Failed, errno=%d : %s",
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TESTFILE, errno, strerror(errno));
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} else {
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write_len += wbytes;
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}
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}
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} /* End setup() */
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/*
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* void
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* cleanup() - performs all ONE TIME cleanup for this test at
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* completion or premature exit.
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* Close the temporary file opened for reading/writing.
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* Remove the test directory and testfile created in the setup.
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*/
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void
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cleanup()
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{
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/*
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* print timing stats if that option was specified.
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*/
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TEST_CLEANUP;
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/* Close the testfile after writing data into it */
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if (close(fd) == -1) {
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tst_brkm(TFAIL, NULL,
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"close(%s) Failed, errno=%d : %s",
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TESTFILE, errno, strerror(errno));
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}
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/* Remove tmp dir and all files in it */
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tst_rmdir();
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/* exit with return code appropriate for results */
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tst_exit();
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} /* End cleanup() */
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