postinst is in lxdm 0.4.1-0ubuntu6.
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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# Debian lxdm package post-installation script
# Based on xdm.postinst
# Copyright 1998-2001, 2003, 2004 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>.
# Acknowledgements to Stephen Early, Mark Eichin, and Manoj Srivastava.
set -e
# source debconf library
. /usr/share/debconf/confmodule
THIS_PACKAGE=lxdm
DEFAULT_DISPLAY_MANAGER_FILE=/etc/X11/default-display-manager
# debconf is not a registry, so we only fiddle with the default file if it
# does not exist
if ! [ -e "$DEFAULT_DISPLAY_MANAGER_FILE" ]; then
DEFAULT_DISPLAY_MANAGER=
if db_get shared/default-x-display-manager; then
DEFAULT_DISPLAY_MANAGER="$RET"
fi
if [ -n "$DEFAULT_DISPLAY_MANAGER" ]; then
DAEMON_NAME=
if db_get "$DEFAULT_DISPLAY_MANAGER"/daemon_name; then
DAEMON_NAME="$RET"
fi
if [ -z "$DAEMON_NAME" ]; then
# if we were unable to determine the name of the selected daemon (for
# instance, if the selected default display manager doesn't provide a
# daemon_name question), guess
DAEMON_NAME=$(which "$DEFAULT_DISPLAY_MANAGER" 2>/dev/null)
fi
if [ -n "$DAEMON_NAME" ]; then
echo "$DAEMON_NAME" > "$DEFAULT_DISPLAY_MANAGER_FILE"
fi
fi
fi
# Registering the init scripts or starting the daemon may cause output to
# stdout, which can confuse debconf.
db_stop
# Remove alternative file if it's not a symlink, workaround for broken upgrade
# See bug #616188
if [ -f /etc/alternatives/lxdm.conf ] ; then
if [ ! -h "/etc/alternatives/lxdm.conf" ] ; then
rm "/etc/alternatives/lxdm.conf"
fi
fi
# Add /etc/lxdm/lxdm.conf from alternative of lxdm configuration
if [ "$1" = configure ]; then
update-alternatives --install /etc/lxdm/default.conf \
lxdm.conf /etc/lxdm/lxdm.conf 50
fi
# Automatically added by dh_installinit
update-rc.d -f lxdm remove >/dev/null || exit $?
# End automatically added section
exit 0
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