newlib-cygwin/winsup/testsuite/winsup.api/ltp/lseek08.c

241 lines
6.7 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: lseek03
*
* 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>
* lseek03 [-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="lseek03"; /* 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 */
ssize_t file_size; /* size of the temporary file */
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[1]; /* 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 move the read/write file
* pointer/handle to the END of the file.
*/
TEST(lseek(fildes, 0, SEEK_END));
/* 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 file_size.
*/
if (TEST_RETURN != file_size) {
tst_resm(TFAIL, "lseek() returned incorrect "
"value %d, expected %d",
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");
}
} /* 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; /* struct. buffer for stat(2) */
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\n");
/* 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 size of the file using fstat */
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;
}
/*
* 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();
}