/*
 * Program: symcheck
 *
 * Copyright (c) 2003, John T. Criswell
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 * 
 *     * Redistributions of source code must retain the above copyright notice,
 *       this list of conditions and the following disclaimer.
 *     * Redistributions in binary form must reproduce the above copyright
 *       notice, this list of conditions and the following disclaimer in the
 *       documentation and/or other materials provided with the distribution.
 *     * Neither the name of the author nor the contributors may be used to
 *       endorse or promote products derived from this software without
 *       specific prior written permission.
 * 
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 *
 * RCS_ID: $Header: /u/jcriswel/src/symcheck/RCS/symcheck.c,v 1.2 2003/03/22 23:38:04 jcriswel Exp $
 */

#include <stdio.h>
#include <stdlib.h>

#include <unistd.h>
#include <errno.h>
#include <sys/types.h>
#include <sys/stat.h>

int
main (int argc, char ** argv)
{
	register int index;
	struct stat fileinfo;

	for (index = 1; index < argc; index++)
	{
		/*
		 * Determine if the file is a symbolic link.
		 */
		if ((lstat (argv[index], &fileinfo)) == -1)
		{
			perror (argv[0]);
			continue;
		}

		/*
		 * Only check for an existing target if the file exists.
		 */
		if (fileinfo.st_mode & S_IFLNK)
		{
			/*
			 * Check to see if the target of this file exists.
			 */
			if ((stat (argv[index], &fileinfo)) == -1)
			{
				if (errno == ENOENT)
				{
					write (STDOUT_FILENO, argv[index], strlen (argv[index]));
					write (STDOUT_FILENO, "\n", 1);
				}
				else
				{
					perror (argv[0]);
				}
			}
		}
	}

	exit (0);
}