/*
 * Copyright (c) 1988 The Regents of the University of California.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms are permitted
 * provided that the above copyright notice and this paragraph are
 * duplicated in all such forms and that any documentation,
 * advertising materials, and other materials related to such
 * distribution and use acknowledge that the software was developed
 * by the University of California, Berkeley.  The name of the
 * University may not be used to endorse or promote products derived
 * from this software without specific prior written permission.
 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
 * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
 */

#ifndef lint
char copyright[] =
"@(#) Copyright (c) 1988 The Regents of the University of California.\n\
 All rights reserved.\n";
#endif /* not lint */

#ifndef lint
static char sccsid[] = "@(#)chroot.c	5.2 (Berkeley) 09/15/88";
#endif /* not lint */

#include <stdio.h>

main(argc, argv)
	int argc;
	char **argv;
{
	char *shell, *getenv();

	if (argc != 2) {
		fprintf(stderr, "usage: chroot directory\n");
		exit(1);
	}
	if (chdir(argv[1])) {
		fprintf(stderr, "chdir: %s: ", argv[1]);
		perror((char *)NULL);
		exit(1);
	}
	if (chroot(argv[1])) {
		fprintf(stderr, "chroot: %s: ", argv[1]);
		perror((char *)NULL);
		exit(1);
	}
	setuid(getuid());
	if (!(shell = getenv("SHELL")))
		shell = "/bin/sh";
	execlp(shell, shell, "-i", (char *)NULL);
	fprintf(stderr, "chroot: no shell %s", shell);
	exit(1);
}