#!/bin/sh -
#
#   Copyright (C) 2007 Oliver Fromme <olli@fromme.com> <olli@secnetix.de>
#   All rights reserverd.  Standard 2-clause BSD license and disclaimer apply.
#
#   List processes that are running inside a jail.
#   This is intended to complement the standard jls(8) command.
#
#   Usage:
#      jps            list all jailed processes
#      jps <JID>      list only processes in jail <JID>.
#
#   Run the jls(8) command to get a list of jails and JIDs.
#
#   Note:  This script works for FreeBSD >= 6 only!
#   For FreeBSD 4.x, please use jailstat instead:
#   http://www.secnetix.de/~olli/scripts/jailstat
#

ME="${0##*/}"

Usage()
{
	cat <<-tac

		$ME  --  List processes that are running inside a jail.
		This is intended to complement the standard jls(8) command.

		Usage:
		$ME            list all jailed processes
		$ME <JID>      list only processes in jail <JID>

		Run the jls(8) command to get a list of jails and JIDs.

	tac
	exit 1
}

if [ $# -gt 2 ]; then
	Usage
fi

if [ $# -eq 1 ]; then
	case "$1" in
		""|*[!0-9]*)	Usage ;;
	esac
	FILTER='$1=="'$1'"'
else
	FILTER='$1!="0"'
fi

ps -axww -o jid,pid,user,command | awk '$1!~/[0-9]/||'"$FILTER" | sort -n

#--