bin/vzpid.in

#!/bin/sh
#  Copyright (C) 2000-2011, Parallels, Inc. All rights reserved.
#
#  This program is free software; you can redistribute it and/or modify
#  it under the terms of the GNU General Public License as published by
#  the Free Software Foundation; either version 2 of the License, or
#  (at your option) any later version.
#
#  This program is distributed in the hope that it will be useful,
#  but WITHOUT ANY WARRANTY; without even the implied warranty of
#  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
#  GNU General Public License for more details.
#
#  You should have received a copy of the GNU General Public License
#  along with this program; if not, write to the Free Software
#  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
#
veidmark='envID:'
namemark='Name:'

usage()
{
	echo 'Usage: vzpid <pid> ...'
	echo '       vzpid -'
}

header()
{
	printf '%s\t%s\t%s\n' 'Pid' 'CTID' 'Name'
}

getveid()
{
	local pid="$1"

	[ -f "/proc/$pid/status" ] || return
	awk -v "pid=$pid" '
BEGIN {veid=0; name=""}
($1 == "'"$namemark"'") {name = $2}
($1 == "'"$veidmark"'") {veid = $2}
END {printf("%d\t%s\t%s\n", pid, veid, name)}
	' <"/proc/$pid/status"
}

if [ $# -eq 0 ]; then
	usage >&2
	exit 1
elif [ $# -eq 1 -a "$1" = '-' ]; then
	set -- `tr -s '[[:space:]]' ' '`
elif [ $# -eq 1 -a "$1" = '-h' ]; then
	usage
	exit 0
fi

header
for i; do
	getveid "$i"
done