/*-

 * Copyright (c) 2003 Mike Barcroft <mike@FreeBSD.org>

 * All rights reserved.

 *

 * Redistribution and use in source and binary forms, with or without

 * modification, are permitted provided that the following conditions

 * are met:

 * 1. Redistributions of source code must retain the above copyright

 *    notice, this list of conditions and the following disclaimer.

 * 2. 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.

 *

 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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.

 *

 * $FreeBSD: src/usr.sbin/jls/jls.c,v 1.3 2003/04/22 13:24:56 mike Exp $

 * $DragonFly: src/usr.sbin/jls/jls.c,v 1.1 2005/01/31 22:29:59 joerg Exp $

 */

#include <sys/param.h>

#include <sys/kinfo.h>

#include <sys/sysctl.h>

#include <err.h>

#include <errno.h>

#include <limits.h>

#include <stdio.h>

#include <stdlib.h>

#include <netinet/in.h>

#include <arpa/inet.h>

int

main(void)

{ 

	struct kinfo_prison *sxp, *xp;

	struct in_addr in;

	size_t i, len;

	if (sysctlbyname("jail.list", NULL, &len, NULL, 0) == -1)

		err(1, "sysctlbyname(): jail.list");

retry:

	if (len == 0)

		exit(0);	

	sxp = xp = malloc(len);

	if (sxp == NULL)

		err(1, "malloc failed");

	if (sysctlbyname("jail.list", xp, &len, NULL, 0) == -1) {

		if (errno == ENOMEM) {

			free(sxp);

			goto retry;

		}

		err(1, "sysctlbyname(): jail.list");

	}

	if (len < sizeof(*xp) || len % sizeof(*xp) ||

	    xp->pr_version != KINFO_PRISON_VERSION)

		errx(1, "Kernel and userland out of sync");

	len /= sizeof(*xp);

	printf("   JID  IP Address      Hostname                      Path\n");

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

		in.s_addr = ntohl(xp->pr_ip);

		printf("%6d  %-15.15s %-29.29s %.74s\n",

		    xp->pr_id, inet_ntoa(in), xp->pr_host, xp->pr_path);

		xp++;

	}

	free(sxp);

	exit(0);

}