This file is indexed.

prerm is in lightdm 1.26.0-0ubuntu1.

This file is a maintainer script. It is executed when installing (*inst) or removing (*rm) the package.

The actual contents of the file can be viewed below.

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#!/bin/bash
# Debian lightdm package pre-removal script
# based on xdm script
# Copyright 2001 Branden Robinson.
# Licensed under the GNU General Public License, version 2.  See the file
# /usr/share/common-licenses/GPL or <http://www.gnu.org/copyleft/gpl.txt>.
# Acknowlegements to Stephen Early, Mark Eichin, and Manoj Srivastava.
# based on gdm pre-removal script

set -e

THIS_PACKAGE=lightdm
DAEMON=/usr/sbin/lightdm

DEFAULT_DISPLAY_MANAGER_FILE=/etc/X11/default-display-manager

if [ "$1" = "remove" ] || [ "$1" = "deconfigure" ]; then
  if [ -e /usr/share/debconf/confmodule ]; then
    . /usr/share/debconf/confmodule
    # disown this question
    db_unregister shared/default-x-display-manager
    # does the question still exist?
    if db_get shared/default-x-display-manager; then
      db_metaget shared/default-x-display-manager owners
      db_subst shared/default-x-display-manager choices "$RET"
      db_get shared/default-x-display-manager
      # are we removing the currently selected display manager?
      if [ "$THIS_PACKAGE" = "$RET" ]; then
        if [ -e "$DEFAULT_DISPLAY_MANAGER_FILE" ]; then
	  if db_get "$RET"/daemon_name; then
	    if [ "$(cat $DEFAULT_DISPLAY_MANAGER_FILE)" = "$RET" ]; then
	      rm "$DEFAULT_DISPLAY_MANAGER_FILE"
	    fi
	  else
	    if [ "$(cat $DEFAULT_DISPLAY_MANAGER_FILE)" = "$DAEMON" ]; then
	      rm "$DEFAULT_DISPLAY_MANAGER_FILE"
	    fi
	  fi
        fi
        # ask the user to choose a new default
        db_fset shared/default-x-display-manager seen false
        db_input critical shared/default-x-display-manager || true
        db_go
        # if the display manager file doesn't exist, write it with the path
        # to the new default display manager
        if [ ! -e $DEFAULT_DISPLAY_MANAGER_FILE ]; then
          db_get shared/default-x-display-manager
          db_get "$RET"/daemon_name
          echo "$RET" > "$DEFAULT_DISPLAY_MANAGER_FILE"
        fi
      fi
    fi
  fi
fi

# Automatically added by dh_installdeb/11.1.4ubuntu1
dpkg-maintscript-helper rm_conffile /etc/lightdm/lightdm.conf.d/50-guest-wrapper.conf 1.9.5-0ubuntu1 -- "$@"
# End automatically added section
# Automatically added by dh_installdeb/11.1.4ubuntu1
dpkg-maintscript-helper rm_conffile /etc/lightdm/lightdm.conf.d/50-greeter-wrapper.conf 1.9.5-0ubuntu1 -- "$@"
# End automatically added section
# Automatically added by dh_installdeb/11.1.4ubuntu1
dpkg-maintscript-helper rm_conffile /etc/lightdm/lightdm.conf.d/50-xserver-command.conf 1.9.5-0ubuntu1 -- "$@"
# End automatically added section


exit 0