/*
*
* 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 <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;
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 */
tst_parse_opts(ac, av, NULL, NULL);
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();
}