/*
 * Copyright (c) 2000 Silicon Graphics, Inc.  All Rights Reserved.
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of version 2 of the GNU General Public License as
 * published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it would be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
 *
 * Further, this software is distributed without any warranty that it is
 * free of the rightful claim of any third person regarding infringement
 * or the like.  Any license provided herein, whether implied or
 * otherwise, applies only to this software file.  Patent licenses, if
 * any, provided herein do not apply to combinations of this program with
 * other software, or any other product whatsoever.
 *
 * You should have received a copy of the GNU General Public License along
 * with this program; if not, write the Free Software Foundation, Inc.,
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Contact information: Silicon Graphics, Inc., 1600 Amphitheatre Pkwy,
 * Mountain View, CA  94043, or:
 *
 * http://www.sgi.com
 *
 * For further information regarding this notice, see:
 *
 * http://oss.sgi.com/projects/GenInfo/NoticeExplan/
 *
 */
/* $Id: readdir01.c,v 1.7 2009/03/23 13:36:01 subrata_modak Exp $ */
/**********************************************************
 *
 *    OS Test - Silicon Graphics, Inc.
 *
 *    TEST IDENTIFIER	: readdir01
 *
 *    EXECUTED BY	: anyone
 *
 *    TEST TITLE	: write multiple files and try to find them with readdir
 *
 *    TEST CASE TOTAL	:
 *
 *    WALL CLOCK TIME	:
 *
 *    CPU TYPES		: ALL
 *
 *    AUTHOR		: Nate Straz
 *
 *    CO-PILOT		:
 *
 *    DATE STARTED	: 02/16/2001
 *
 *    INITIAL RELEASE	: Linux 2.4.x
 *
 *    TEST CASES
 *
 * 	1.) Create n files and check that readdir() finds n files
 *
 *    INPUT SPECIFICATIONS
 * 	The standard options for system call tests are accepted.
 *	(See the parse_opts(3) man page).
 *
 *    OUTPUT SPECIFICATIONS
 *$
 *    DURATION
 * 	Terminates - with frequency and infinite modes.
 *
 *    SIGNALS
 * 	Uses SIGUSR1 to pause before test if option set.
 * 	(See the parse_opts(3) man page).
 *
 *    RESOURCES
 * 	None
 *
 *    ENVIRONMENTAL NEEDS
 *      No run-time environmental needs.
 *
 *    SPECIAL PROCEDURAL REQUIREMENTS
 * 	None
 *
 *    INTERCASE DEPENDENCIES
 * 	None
 *
 *    DETAILED DESCRIPTION
 *	This is a Phase I test for the readdir(2) system call.  It is intended
 *	to provide a limited exposure of the system call, for now.  It
 *	should/will be extended when full functional tests are written for
 *	readdir(2).
 *
 * 	Setup:
 * 	  Setup signal handling.
 *	  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, Issue a PASS message.
 *
 * 	Cleanup:
 * 	  Print errno log and/or timing stats if options given
 *
 *
 *#*#*#*#*#*#*#*#*#*#*#*#*#*#*#*#*#*#*#*#*#*#*#*#*#*#*#*#*#**/

#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <dirent.h>
#include <unistd.h>
#include <errno.h>
#include <string.h>
#include <signal.h>
#include "test.h"

 /* The setup and cleanup functions are basic parts of a test case.  These
  * steps are usually put in separate functions for clarity.  The help function
  * is only needed when you are adding new command line options.
  */
void setup();
void help();
void cleanup();

char *TCID = "readdir01";
int TST_TOTAL = 2;

#define BASENAME	"readdirfile"

char Basename[255];
char Fname[255];
int Nfiles = 0;

/* To add command line options you need to declare a structure to pass to
 * parse_opts().  options is the structure used in this example.  The format is
 * the string that should be added to optstring in getopt(3), an integer that
 * will be used as a flag if the option is given, and a pointer to a string that
 * should receive the optarg parameter from getopt(3).  Here we add a -N
 * option.  Long options are not supported at this time.
 */
char *Nfilearg;
int Nflag = 0;

/* for test specific parse_opts options */
option_t options[] = {
	{"N:", &Nflag, &Nfilearg},	/* -N #files */
	{NULL, NULL, NULL}
};

/***********************************************************************
 * Main
 ***********************************************************************/
int main(int ac, char **av)
{
	int lc;
	const char *msg;
	int cnt;
	int nfiles, fd;
	char fname[255];
	DIR *test_dir;
	struct dirent *dptr;

    /***************************************************************
     * parse standard options
     ***************************************************************/
	/* start off by parsing the command line options.  We provide a function
	 * that understands many common options to control looping.  If you are not
	 * adding any new options, pass NULL in place of options and &help.
	 */
	if ((msg = parse_opts(ac, av, options, &help)) != 0) {
		tst_brkm(TBROK, NULL, "OPTION PARSING ERROR - %s", msg);
	}

	if (Nflag) {
		if (sscanf(Nfilearg, "%i", &Nfiles) != 1) {
			tst_brkm(TBROK, NULL, "--N option arg is not a number");
		}
	}

    /***************************************************************
     * perform global setup for test
     ***************************************************************/
	/* Next you should run a setup routine to make sure your environment is
	 * sane.
	 */
	setup();

    /***************************************************************
     * check looping state
     ***************************************************************/
	/* TEST_LOOPING() is a macro that will make sure the test continues
	 * looping according to the standard command line args.
	 */
	for (lc = 0; TEST_LOOPING(lc); lc++) {

		tst_count = 0;

		if (Nfiles)
			nfiles = Nfiles;
		else
			/* min of 10 links and max of a 100 links */
			nfiles = (lc % 90) + 10;

		/* create a bunch of files to look at */
		for (cnt = 0; cnt < nfiles; cnt++) {

			sprintf(fname, "%s%d", Basename, cnt);
			if ((fd = open(fname, O_RDWR | O_CREAT, 0700)) == -1) {
				tst_brkm(TBROK, cleanup,
					 "open(%s, O_RDWR|O_CREAT,0700) Failed, errno=%d : %s",
					 fname, errno, strerror(errno));
			} else if (write(fd, "hello\n", 6) < 0) {
				tst_brkm(TBROK, cleanup,
					 "write(%s, \"hello\\n\", 6) Failed, errno=%d : %s",
					 fname, errno, strerror(errno));
			} else if (close(fd) < 0) {
				tst_res(TWARN,
					"close(%s) Failed, errno=%d : %s",
					fname, errno, strerror(errno));
			}
		}

		if ((test_dir = opendir(".")) == NULL) {
			tst_resm(TFAIL, "opendir(\".\") Failed, errno=%d : %s",
				 errno, strerror(errno));
		} else {
			/* count the entries we find to see if any are missing */
			cnt = 0;
			errno = 0;
			while ((dptr = readdir(test_dir)) != 0) {
				if (strcmp(dptr->d_name, ".")
				    && strcmp(dptr->d_name, ".."))
					cnt++;
			}

			if (errno != 0) {
				tst_resm(TFAIL,
					 "readir(test_dir) Failed on try %d, errno=%d : %s",
					 cnt + 1, errno, strerror(errno));
			}
			if (cnt == nfiles) {
				tst_resm(TPASS,
					 "found all %d that were created",
					 nfiles);
			} else if (cnt > nfiles) {
				tst_resm(TFAIL,
					 "found more files than were created");
				tst_resm(TINFO, "created: %d, found: %d",
					 nfiles, cnt);
			} else {
				tst_resm(TFAIL,
					 "found less files than were created");
				tst_resm(TINFO, "created: %d, found: %d",
					 nfiles, cnt);
			}
		}

		/* Here we clean up after the test case so we can do another iteration.
		 */
		for (cnt = 0; cnt < nfiles; cnt++) {

			sprintf(fname, "%s%d", Basename, cnt);

			if (unlink(fname) == -1) {
				tst_res(TWARN,
					"unlink(%s) Failed, errno=%d : %s",
					Fname, errno, strerror(errno));
			}
		}

	}

    /***************************************************************
     * cleanup and exit
     ***************************************************************/
	cleanup();

	tst_exit();
}

/***************************************************************
 * help
 ***************************************************************/
/* The custom help() function is really simple.  Just write your help message to
 * standard out.  Your help function will be called after the standard options
 * have been printed
 */
void help(void)
{
	printf("  -N #files : create #files files every iteration\n");
}

/***************************************************************
 * setup() - performs all ONE TIME setup for this test.
 ***************************************************************/
void setup(void)
{
	/* You will want to enable some signal handling so you can capture
	 * unexpected signals like SIGSEGV.
	 */
	tst_sig(NOFORK, DEF_HANDLER, cleanup);

	/* One cavet that hasn't been fixed yet.  TEST_PAUSE contains the code to
	 * fork the test with the -c option.  You want to make sure you do this
	 * before you create your temporary directory.
	 */
	TEST_PAUSE;

	/* If you are doing any file work, you should use a temporary directory.  We
	 * provide tst_tmpdir() which will create a uniquely named temporary
	 * directory and cd into it.  You can now create files in the current
	 * directory without worrying.
	 */
	tst_tmpdir();

	sprintf(Basename, "%s_%d.", BASENAME, getpid());
}

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

	/* If you use a temporary directory, you need to be sure you remove it. Use
	 * tst_rmdir() to do it automatically.$
	 */
	tst_rmdir();

}