Radix cross Linux

#!/bin/sh

# Preserve new files
install_file() {
  NEW="$1"
  OLD="`dirname $NEW`/`basename $NEW .new`"
  # If there's no file by that name, mv it over:
  if [ ! -r $OLD ]; then
    mv $NEW $OLD
  elif [ "`cat $OLD | md5sum`" = "`cat $NEW | md5sum`" ]; then # toss the redundant copy
    rm $NEW
  fi
  # Otherwise, we leave the .new copy for the admin to consider...
}

preserve_perms() {
  NEW="$1"
  OLD="$(dirname $NEW)/$(basename $NEW .new)"
  if [ -e $OLD ]; then
    cp -a $OLD ${NEW}.incoming
    cat $NEW > ${NEW}.incoming
    touch -r $NEW ${NEW}.incoming
    mv ${NEW}.incoming $NEW
  fi
  install_file $NEW
}


# arg 1:  the new package version
pre_install() {
  /bin/true
}

# arg 1:  the new package version
post_install() {
  preserve_perms etc/rc.d/rc.networkmanager.new
  install_file   etc/NetworkManager/NetworkManager.conf.new
  install_file   etc/NetworkManager/conf.d/00-rc-manager.conf.new
  install_file   etc/NetworkManager/conf.d/00-dhcp-client.conf.new

  # If the .pid file is found in the old location, move it to the new one:
  if [ -r var/run/NetworkManager.pid ]; then
    mv var/run/NetworkManager.pid var/run/NetworkManager/NetworkManager.pid
  fi
}

# arg 1:  the new package version
# arg 2:  the old package version
pre_update() {
  /bin/true
}

# arg 1:  the new package version
# arg 2:  the old package version
post_update() {
  post_install
}

# arg 1:  the old package version
pre_remove() {
  /bin/true
}

# arg 1:  the old package version
post_remove() {
  /bin/true
}


operation=$1
shift

$operation $*