#!/bin/bash
#
# 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.

version=@version@

shopt -s extglob

LIBDIR='@libdir@'

[[ -r ${LIBDIR}/util-msg.sh ]] && source ${LIBDIR}/util-msg.sh

import ${LIBDIR}/util-mount.sh
import ${LIBDIR}/util.sh

automount=false

usage() {
	echo 'usage: ${0##*/} chroot-dir [command]'
	echo '-a             Automount detected linux system'
	echo '-h             Print this help message'
	echo ''
	echo "If 'command' is unspecified, ${0##*/} will launch /bin/sh."
	exit $1
}

orig_argv=("$@")

opts=':ha'

while getopts ${opts} arg; do
	case "${arg}" in
		a) automount=true ;;
		*) echo "invalid argument ${arg}"; usage 1;;
		h|?) usage 0 ;;
	esac
done
shift $(( OPTIND - 1 ))

check_root "$0" "${orig_argv[@]}"

if ${automount};then
	chrootdir=/mnt
	chroot_mount_partitions $chrootdir
else
	chrootdir=$1
	shift
fi

[[ -d $chrootdir ]] || die "Can't create chroot on non-directory %s" "$chrootdir"
chroot_api_mount "$chrootdir" || die "failed to setup API filesystems in chroot %s" "$chrootdir"
chroot_mount /etc/resolv.conf "$chrootdir/etc/resolv.conf" --bind

SHELL=/bin/sh unshare --fork --pid chroot "$chrootdir" "$@"