#! /bin/bash
# $Id: chbind 2394 2006-11-23 21:12:26Z dhozac $

# Copyright (C) 2004 Enrico Scholz <enrico.scholz@informatik.tu-chemnitz.de>
# Copyright (C) 2006 Daniel Hokka Zakrisson
#  
# 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; version 2 of the License.
#  
# 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.

: ${UTIL_VSERVER_VARS:=/usr/lib/util-vserver/util-vserver-vars}
test -e "$UTIL_VSERVER_VARS" || {
    echo $"Can not find util-vserver installation (the file '$UTIL_VSERVER_VARS' would be expected); aborting..." >&2
    exit 1
}
. "$UTIL_VSERVER_VARS"
. "$_LIB_FUNCTIONS"

function showHelp()
{
    echo \
$"Usage: $1  [--silent] [--nid <nid>] [--ip <ip_num>[/<mask>]]
             [--bcast <broadcast>] [--] <commands> <args>*

--silent
    Do not print the addresses assigned.
--nid <nid>
    Network context id to use.
--ip <ip_num>[/<mask>]
    IP address to bind to.
--bcast <broadcast>
    Broadcast address for the network context.

Report bugs to <$PACKAGE_BUGREPORT>."
    exit $2
}

function showVersion()
{
    echo \
$"chbind $PACKAGE_VERSION -- bind to IP addresses and execute a program
This program is part of $PACKAGE_STRING

Copyright (C) 2004 Enrico Scholz
Copyright (C) 2006 Daniel Hokka Zakrisson
This program is free software; you may redistribute it under the terms of
the GNU General Public License.  This program has absolutely no warranty."
    exit $1
}

tmp=$(getopt -o + --long ncap:,nid:,ip:,bcast:,disconnect,flag:,secure,silent,help,version -n "$0" -- "$@") || exit 1
eval set -- "$tmp"

OPT_CAPS=()
OPT_NID=
OPT_DISCONNECT=
OPT_FLAGS=()
OPT_SECURE=
OPT_SILENT=
OPT_BCAST=
OPT_IPS=()

while true; do
    case "$1" in
	--help)    	showHelp $0 0;;
	--version) 	showVersion 0;;
	--ncap)		OPT_CAPS=( "${OPT_CAPS[@]}" "$2" ); shift;;
	--nid)		OPT_NID=$2; shift;;
	--disconnect)	OPT_DISCONNECT=1;;
	--flag)		OPT_FLAGS=( "${OPT_FLAGS[@]}" "$2" ); shift;;
	--secure)	OPT_SECURE=1;;
	--silent)	OPT_SILENT=1;;
	--ip)		OPT_IPS=( "${OPT_IPS[@]}" --ip "$2" ); shift;;
	--bcast)	OPT_BCAST=$2; shift;;
	--)		shift; break;;
	*)		echo $"chbind: internal error; arg=='$1'" >&2; exit 1;;
    esac
    shift
done

$_VSERVER_INFO - FEATURE vnet || exec $_CHBIND_COMPAT \
	${OPT_NID:+--nid "$OPT_NID"} \
	${OPT_SILENT:+--silent} \
	${OPT_BCAST:+--bcast "$OPT_BCAST"} \
	"${OPT_IPS[@]}" \
	-- "$@"

create_cmd=( $_NCONTEXT --create --silentexist
	     ${OPT_SILENT:+--silent}
	     ${OPT_NID:+--nid "$OPT_NID"} )

chain_cmd=()

old_IFS=$IFS
IFS=,$IFS

chain_cmd=( "${chain_cmd[@]}"
		--
		$_NATTRIBUTE --set
		${OPT_SECURE:+--secure}
		${OPT_CAPS:+--ncap "${OPT_CAPS[*]}"}
		${OPT_FLAGS:+--flag "${OPT_FLAGS[*]}"}
		--
		$_NADDRESS --add
		${OPT_SILENT:+--silent}
		${OPT_BCAST:+--bcast "$OPT_BCAST"}
		"${OPT_IPS[@]}" )

migrate_cmd=( $_NCONTEXT
	      ${OPT_SILENT:+--silent}
	      ${OPT_DISCONNECT:+--disconnect} )

IFS=$old_IFS

if test -z "$OPT_NID" || $_VSERVER_INFO -q "$OPT_NID" XIDTYPE static; then
    "${create_cmd[@]}" "${chain_cmd[@]}" -- "$@"
    rc=$?
else
    rc=254
fi

test "$rc" -ne 254 || exec "${migrate_cmd[@]}" --nid "$OPT_NID" --migrate -- "$@"
exit $rc