# arg 1:  the new package version

pre_install () {
if [ ! -f /sbin/halt-init ]
then
   mv /sbin/halt  /sbin/halt-init
   mv /sbin/shutdown  /sbin/shutdown-init
fi
   rm -f /sbin/reboot
   rm -f /sbin/poweroff

}

pre_upgrade () {
if [ ! -f /sbin/halt-init ]
then
   mv /sbin/halt  /sbin/halt-init
fi

if [ ! -f /sbin/shutdown-init ]
then
   mv /sbin/shutdown  /sbin/shutdown-init
fi
   rm -f /sbin/reboot
   rm -f /sbin/poweroff

}

post_install () {
   [ -e /sbin/halt ] || ln -s /sbin/halt.script /sbin/halt
   [ -e /sbin/reboot ] || ln -s /sbin/reboot.script /sbin/reboot
   [ -e /sbin/poweroff ] ||  ln -s /sbin/poweroff.script /sbin/poweroff
   [ -e /sbin/reboot.init ] || ln -s /sbin/halt-init /sbin/reboot.init
   [ -e /sbin/poweroff.init ] || ln -s /sbin/halt-init /sbin/poweroff.init
   [ -e /sbin/shutdown ] || ln -s /sbin/shutdown.script /sbin/shutdown
}

# arg 1:  the new package version
# arg 2:  the old package version

post_upgrade(){
    post_install
}

op=$1
shift

$op $*