27livedata

#!/bin/sh
# live-tools/27livedata: script applied on casper init

PREREQ=''
DESCRIPTION='Applying live data extensions...'

case $1 in
# get pre-requisites
prereqs)
  echo "$PREREQ"
  exit 0
  ;;
esac

. /scripts/casper-functions
log_begin_msg "$DESCRIPTION"

# default values
live_path='/.sys'
data_path=''
data_ext='tgz txz tbz tar.xz tar.gz tar.bz2'

# determine live/data path
for arg in `cat /proc/cmdline`; do \
  case "$arg" in
    live-media-path=*)     live_path=${arg#live-media-path=};;
    live-data-path=*)      data_path=${arg#live-data-path=};;
    live-data-extensions=*) data_ext=${arg#live-data-extensions=};;
  esac
done

# find and unpack live data files
livedata_unpack_archive () {
  local base="${1}"
  shift
  local dest="${1}"
  shift
  
  for ext in "${@}"; do \
    [ -r "/root/${base}.${ext}" ] && chroot /root tar -x -C "${dest}"  -f "${base}.${ext}"
  done
}

# unpack live data
livedata_unpack () {
  local sys_arch=`uname -m`
  
  # unpack system data
  for base in "/cdrom/${1}/root" "/cdrom/${1}/root_${sys_arch}"; do
    livedata_unpack_archive "${base}" '/' ${data_ext}
  done
  # live user settings
  for base in "/cdrom/${1}/home" "/cdrom/${1}/home_${sys_arch}"; do
    livedata_unpack_archive "${base}" "/home/${USERNAME}" ${data_ext}
  done
  chroot /root chown -R "${USERNAME}:${USERNAME}" "/home/${USERNAME}"
  # opt directory
  for base in "/cdrom/${1}/opt" "/cdrom/${1}/opt_${sys_arch}"; do
    livedata_unpack_archive "${base}" '/opt' ${data_ext}
  done
}

# unpack live system data
[ -n "${live_path}" ] \
  && livedata_unpack "${live_path}"

# unpack additional live data
[ -n "${data_path}" -a "x${data_path}" != "x${live_path}" ] \
  && livedata_unpack "${data_path}"

# clean environment
unset live_path
unset data_path
unset data_ext

log_end_msg