newlib-cygwin/winsup/testsuite/winsup.api/ltp/lseek09.c

267 lines
7.5 KiB
C

/*
*
* 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
/*
* Test Name: lseek04
*
* Test Description:
* Verify that, lseek() call succeeds to set the file pointer position
* to the current specified location, when 'whence' value is set to
* SEEK_CUR and the data read from the specified location should match
* the expected data.
*
* Expected Result:
* lseek() should return the specified offset from the beginning of the file
* measured in bytes. The data read from this location should match the
* expected data.
*
* 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>
* lseek04 [-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 <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
const char *TCID="lseek04"; /* Test program identifier. */
int TST_TOTAL=1; /* Total number of test cases. */
extern int Tst_count; /* Test Case counter for tst_* routines */
int fildes; /* file handle for temp file */
size_t file_size; /* total size of file after data write */
void setup(); /* Main setup function of test */
void cleanup(void) __attribute__((noreturn)); /* cleanup function for the test */
int
main(int ac, char **av)
{
int lc; /* loop counter */
const char *msg; /* message returned from parse_opts */
char read_buf[BUFSIZ]; /* data read from temp. file */
/* Parse standard options given to run the test. */
msg = parse_opts(ac, av, (option_t *) NULL, NULL);
if (msg != (char *) NULL) {
tst_brkm(TBROK, NULL, "OPTION PARSING ERROR - %s", msg);
tst_exit();
}
/* Perform global setup for test */
setup();
/* Check looping state if -i option given */
for (lc = 0; TEST_LOOPING(lc); lc++) {
/* Reset Tst_count in case we are looping. */
Tst_count=0;
/*
* Invoke lseek(2) to set the file
* pointer/handle from the current location
* of the file descriptor + specified offset.
*/
TEST(lseek(fildes, 1, SEEK_CUR));
/* check return code of lseek(2) */
if (TEST_RETURN == (off_t)-1) {
tst_resm(TFAIL, "lseek on (%s) Failed, errno=%d : %s",
TEMP_FILE, TEST_ERRNO, strerror(TEST_ERRNO));
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 3 positions from the beginning of the file.
* ie, 2 positions from lseek() in the setup +
* 1 position from above above.
*/
if (TEST_RETURN != 3) {
tst_resm(TFAIL, "lseek() returned incorrect "
"value %d, expected 4", TEST_RETURN);
continue;
}
/*
* Read the data byte from this location.
*/
read_buf[0] = '\0';
if (read(fildes, &read_buf, (file_size - 3)) < 0) {
tst_brkm(TFAIL, cleanup,
"read() failed on %s, error=%d",
TEMP_FILE, errno);
} else {
/*
* Check if read data contains
* expected characters
* From pos 4 ---> 'defg'.
*/
if (memcmp(read_buf, "defg", 4)) {
tst_resm(TFAIL, "Incorrect data read "
"from file %s", TEMP_FILE);
} else {
tst_resm(TPASS, "Functionality of "
"lseek() on %s successful",
TEMP_FILE);
}
}
} else {
tst_resm(TPASS, "call succeeded");
}
/* reset file pointer in case we are looping */
if (lseek(fildes, 2, SEEK_SET) == -1) {
tst_brkm(TBROK, cleanup, "lseek failed - could not "
"reset file pointer");
}
} /* End for TEST_LOOPING */
/* Call cleanup() to undo setup done for the test. */
cleanup();
/*NOTREACHED*/
} /* End main */
/*
* 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; /* buffer to hold stat info. */
char write_buf[BUFSIZ]; /* buffer to hold data */
/* capture signals */
tst_sig(NOFORK, DEF_HANDLER, cleanup);
/* Pause if that option was specified */
TEST_PAUSE;
/* make a temp directory and cd to it */
tst_tmpdir();
/* Get the data to be written to temporary file */
strcpy(write_buf, "abcdefg");
/* Creat/open a temporary file under above directory */
if ((fildes = open(TEMP_FILE, O_RDWR | O_CREAT, FILE_MODE)) == -1) {
tst_brkm(TBROK, cleanup,
"open(%s, O_RDWR|O_CREAT, %#o) Failed, errno=%d :%s",
TEMP_FILE, FILE_MODE, errno, strerror(errno));
}
/* Write data into temporary file */
if(write(fildes, write_buf, strlen(write_buf)) <= 0) {
tst_brkm(TBROK, cleanup, "write(2) on %s Failed, errno=%d : %s",
TEMP_FILE, errno, strerror(errno));
}
/* Get the temporary file information */
if (fstat(fildes, &stat_buf) < 0) {
tst_brkm(TBROK, cleanup, "fstat(2) on %s Failed, errno=%d : %s",
TEMP_FILE, errno, strerror(errno));
}
file_size = stat_buf.st_size;
/*
* Reset the file pointer position to the specified offset
* from the beginning of the file.
*/
if (lseek(fildes, 2, SEEK_SET) != 2) {
tst_brkm(TBROK, cleanup,
"lseek() fails to set file ptr. to specified offset");
}
}
/*
* 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));
}
/* Remove tmp dir and all files in it */
tst_rmdir();
/* exit with return code appropriate for results */
tst_exit();
}