close01.c

cygwin, 著名的在win32下模拟unix操作系统的东东

/*
 *
 *   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
 */

/*
 * NAME
 * 	close01.c
 *
 * DESCRIPTION
 * 	Test that closing a regular file and a pipe works correctly
 *
 * ALGORITHM
 * 	Creat a file, and dup() a fildes
 * 	Open a pipe
 *	call close() using the TEST macro
 *	if the call fails
 *	   issue a FAIL message and continue
 *	else if STD_FUNCTIONAL_TEST
 *	   attempt to close the file/pipe again
 *	   if there is an error
 *	      issue a PASS message
 *	   else
 *	      issue a FAIL message
 *	else
 *	   issue a PASS message
 *	
 *
 * USAGE:  <for command-line>
 *  close01 [-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 <stdio.h>
#include <errno.h>
#include "test.h"
#include "usctest.h"

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

char *TCID = "close01()";
int TST_TOTAL = 2;
extern int Tst_count;

char fname[40] = "";

int fild = -1;
int newfd = -1;
int pipefildes[2];

struct test_case_t {
        int *fd;
	char *type;
} TC[] = {
	/* file descriptor for a regular file */
        {&newfd, "file"},

	/* file descriptor for a pipe */
        {&pipefildes[0], "pipe"}
};

main(int ac, char **av)
{

	int i;
	int lc;				/* loop counter */
	const char *msg;		/* message returned from parse_opts */

	/* parse standard options */
	if ((msg = parse_opts(ac, av, (option_t *)NULL, NULL)) != (char *)NULL){
		tst_brkm(TBROK, cleanup, "OPTION PARSING ERROR - %s", msg);
		/*NOTREACHED*/
	}

	setup();			/* global setup */

	/* The following loop checks looping state if -i option given */
	for (lc = 0; TEST_LOOPING(lc); lc++) {

		/* reset Tst_count in case we are looping */
		Tst_count = 0;

		/* set up the file and pipe for the test */
		if ((fild = creat(fname, 0777)) == -1) {
			perror (fname);
			tst_brkm(TBROK, cleanup, "can't open file %s", fname);
		}

		if ((newfd = dup(fild)) == -1) {
			tst_brkm(TBROK, cleanup, "can't dup the file des");
		}

		if (pipe(pipefildes) == -1) {
			tst_brkm(TBROK, cleanup, "can't open pipe");
		}

		/* loop through the test cases */

		for (i = 0; i < TST_TOTAL; i++) {

			TEST(close(*TC[i].fd));

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

			if (STD_FUNCTIONAL_TEST) {
				/* attempt to close the fd again */
				if (close(*TC[i].fd) == -1) {
					tst_resm(TPASS, "%s appears closed",
						 TC[i].type);
				} else {
					tst_resm(TFAIL, "%s close succeeded on"
						 "second attempt", TC[i].type);
				}
			} else {
				tst_resm(TPASS, "call succeeded");
			}
		}

	}
	cleanup();
	/*NOTREACHED*/
}

/*
 * setup() - performs all ONE TIME setup for this test
 */
void
setup(void)
{
	int mypid;

	/* capture signals */
	tst_sig(FORK, DEF_HANDLER, cleanup);

	umask(0);

	/* Pause if that option was specified */
	TEST_PAUSE;

	/* make a temp directory and cd to it */
	tst_tmpdir();

	mypid = getpid();
	sprintf(fname, "fname.%d", mypid);
}

/*
 * cleanup() - performs all the ONE TIME cleanup for this test at completion
 * 	       or premature exit.
 */
void
cleanup(void)
{
	/*
	 * print timing status if that option was specified.
	 * print errno log if that option was specified
	 */
	TEST_CLEANUP;

	if (fild >= 0)
		close (fild);
	if (newfd >= 0)
		close (newfd);

	/* Remove tmp dir and all files in it */
	tst_rmdir();

	/* exit with return code appropriate for results */
	tst_exit();
}