display-manager-dpkg-post-invoke

#!/bin/bash

## This file is part of Whonix.
## Copyright (C) 2012 - 2014 Patrick Schleizer <adrelanos@riseup.net>
## See the file COPYING for copying conditions.

#echo "$BASH_SOURCE INFO: Begin..."

## Technical comment:
## rads has a feature, which determines whether the display manager (dm)
## gets autostarted based on available RAM and other configuration options.
##
## This is required, because when a display manager gets upgraded by
## apt-get/dpkg, its postinst script by default runs
## "update-rc.d $dm defaults", unless $dm which /etc/init.d/$dm is not
## executable, which clashes with this feature. Making /etc/init.d/$dm not
## executable with a chroot-scripts-post.d script is no option either,
## because this would break "sudo service $dm restart" for the user.
##
## - hook to call this file: /etc/apt/apt.conf.d/90rads
## - configuration file: /etc/rads.d/30_default.conf

if [ "$(id -u)" != "0" ]; then
    echo "$BASH_SOURCE ERROR: This must be run as root (sudo)!"
    exit 1
else
    true "$BASH_SOURCE INFO: Script running as root."
fi

shopt -s nullglob
for i in /etc/rads.d/*.conf /rw/config/rads.d/*.conf; do
   bash_n_exit_code="0"
   bash -n "$i" || { bash_n_exit_code="$?" ; true; };
   if [ ! "$bash_n_exit_code" = "0" ]; then
      echo "$BASH_SOURCE ERROR: invalid rads config file $i." >&2
      exit 1
   fi
   source "$i"
done

[ -n "$rads_autostart_decision_feature" ] || rads_autostart_decision_feature="1"

if [ ! "$rads_autostart_decision_feature" = "1" ]; then
   true "$BASH_SOURCE INFO: rads_autostart_decision_feature is not set to 1, doing nothing."
   exit 0
fi

if [ "$rads_disable_rc_d_remove" = "1" ]; then
   true "$BASH_SOURCE INFO: rads_disable_rc_d_remove is set to 1. Do nothing. Exit."
   exit 0
fi

#echo "$BASH_SOURCE INFO: Deactivating display manager (kdm, gdm, gdm3, lightdm, slim, wdm, xdm, nodm, sddm) /etc/init.d/ autostart mechanism, since this is handled by rads..."

update-rc.d kdm remove >/dev/null 2>/dev/null
update-rc.d gdm remove >/dev/null 2>/dev/null
update-rc.d gdm3 remove >/dev/null 2>/dev/null
update-rc.d lightdm remove >/dev/null 2>/dev/null
update-rc.d slim remove >/dev/null 2>/dev/null
update-rc.d wdm remove >/dev/null 2>/dev/null
update-rc.d xdm remove >/dev/null 2>/dev/null
update-rc.d nodm remove >/dev/null 2>/dev/null
update-rc.d sddm remove >/dev/null 2>/dev/null

#echo "$BASH_SOURCE INFO: Done."

exit 0