#!/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

if [[ -r @libdir@/messages.sh ]];then
    source @libdir@/messages.sh
fi

if [[ -r @libdir@/mount-api.sh ]];then
    source @libdir@/mount-api.sh
fi

usage() {
  cat <<EOF
usage: ${0##*/} chroot-dir [command]

    -h             Print this help message

If 'command' is unspecified, ${0##*/} will launch /bin/sh.

EOF
}

if [[ -z $1 || $1 = @(-h|--help) ]]; then
  usage
  exit $(( $# ? 0 : 1 ))
fi

(( EUID == 0 )) || die 'This script must be run with root privileges'
chrootdir=$1
shift

[[ -d $chrootdir ]] || die "Can't create chroot on non-directory %s" "$chrootdir"

api_fs_mount "$chrootdir" || die "failed to setup API filesystems in chroot %s" "$chrootdir"
track_mount /etc/resolv.conf "$chrootdir/etc/resolv.conf" --bind

SHELL=/bin/sh chroot "$chrootdir" "$@"