testcases/kernel/syscalls/dup2/dup202.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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
 */

/*
 * NAME
 *	dup202.c
 *
 * DESCRIPTION
 *	Is the access mode the same for both file descriptors?
 *		0: read only ?	"0444"
 *		1: write only ? "0222"
 *		2: read/write ? "0666"
 *
 * ALGORITHM
 *	Creat a file with each access mode; dup each file descriptor;
 *	stat each file descriptor and compare modes of each pair
 *
 * USAGE:  <for command-line>
 *  dup202 [-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 <sys/stat.h>
#include <errno.h>
#include <fcntl.h>
#include <stdio.h>
#include "test.h"

char *TCID = "dup202";
int TST_TOTAL = 3;

void setup(void);
void cleanup(void);

char testfile[40];
int fail;
int newfd;

/* set these to a known index into our local file descriptor table */
int duprdo = 10, dupwro = 20, duprdwr = 30;

struct test_case_t {
	int *nfd;
	mode_t mode;
} TC[] = {
	/* The first test creat(es) a file with mode 0444 */
	{
	&duprdo, (S_IRUSR | S_IRGRP | S_IROTH)},
	    /* The second test creat(es) a file with mode 0222 */
	{
	&dupwro, (S_IWUSR | S_IWGRP | S_IWOTH)},
	    /* The third test creat(es) a file with mode 0666 */
	{
	&duprdwr,
		    (S_IRUSR | S_IRGRP | S_IROTH | S_IWUSR | S_IWGRP | S_IWOTH)}
};

int main(int ac, char **av)
{
	int lc;
	const char *msg;
	int i, ofd;
	struct stat oldbuf, newbuf;

	if ((msg = parse_opts(ac, av, NULL, NULL)) != NULL)
		tst_brkm(TBROK, NULL, "OPTION PARSING ERROR - %s", msg);

	setup();

	for (lc = 0; TEST_LOOPING(lc); lc++) {

		tst_count = 0;

		/* loop through the test cases */
		for (i = 0; i < TST_TOTAL; i++) {

			if ((ofd = creat(testfile, TC[i].mode)) == -1)
				tst_brkm(TBROK | TERRNO, cleanup,
					 "creat failed");

			TEST(dup2(ofd, *TC[i].nfd));

			if (TEST_RETURN == -1) {
				tst_resm(TFAIL | TERRNO,
					 "call failed unexpectedly");
				continue;
			}

			/* stat the original file */
			if (fstat(ofd, &oldbuf) == -1)
				tst_brkm(TBROK | TERRNO, cleanup,
					 "fstat #1 failed");

			/* stat the duped file */
			if (fstat(*TC[i].nfd, &newbuf) == -1)
				tst_brkm(TBROK | TERRNO, cleanup,
					 "fstat #2 failed");

			if (oldbuf.st_mode != newbuf.st_mode)
				tst_resm(TFAIL, "original and dup "
					 "modes do not match");
			else
				tst_resm(TPASS, "fstat shows new and "
					 "old modes are the same");

			/* remove the file so that we can use it again */
			if (close(*TC[i].nfd) == -1)
				perror("close failed");
			if (close(ofd) == -1)
				perror("close failed");
			if (unlink(testfile) == -1)
				perror("unlink failed");
		}
	}

	cleanup();
	tst_exit();
}

/*
 * setup() - performs all ONE TIME setup for this test.
 */
void setup(void)
{

	tst_sig(NOFORK, DEF_HANDLER, cleanup);

	TEST_PAUSE;

	tst_tmpdir();

	(void)umask(0);

	sprintf(testfile, "dup202.%d", getpid());
}

/*
 * cleanup() - performs all ONE TIME cleanup for this test at
 *	       completion or premature exit.
 */
void cleanup(void)
{
	tst_rmdir();
}