postinst is in lightdm 1.18.3-0ubuntu1.1.
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.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 | #!/bin/sh
set -e
if dpkg-maintscript-helper supports mv_conffile; then
dpkg-maintscript-helper mv_conffile \
/etc/lightdm.conf \
/etc/lightdm/lightdm.conf \
0.3.7-0ubuntu2 -- "$@"
fi
. /usr/share/debconf/confmodule
THIS_PACKAGE=lightdm
DEFAULT_DISPLAY_MANAGER_FILE=/etc/X11/default-display-manager
# creating lightdm group if he isn't already there
if ! getent group lightdm >/dev/null; then
addgroup --system lightdm
fi
# creating lightdm user if he isn't already there
if ! getent passwd lightdm >/dev/null; then
adduser --system --ingroup lightdm --home /var/lib/lightdm lightdm
usermod -c "Light Display Manager" lightdm
usermod -d "/var/lib/lightdm" lightdm
usermod -g "lightdm" lightdm
usermod -s "/bin/false" lightdm
fi
# Creating nopasswdlogin group if he isn't already there.
# That enables the password-less login feature in the users-admin
# tool of the gnome-system-tools for users that belong to it,
# and which is working thanks to LightDM's PAM policy.
if ! getent group nopasswdlogin >/dev/null; then
addgroup --system nopasswdlogin
fi
if [ -d /var/lib/lightdm ]; then
chown -R lightdm:lightdm /var/lib/lightdm || true
chmod 0750 /var/lib/lightdm
fi
# debconf is not a registry, so we only fiddle with the default file if it
# does not exist
if ! [ -e "$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
DEFAULT_SERVICE=/etc/systemd/system/display-manager.service
# set default-display-manager systemd service link according to our config
if [ "$1" = configure ] && [ -d /etc/systemd/system/ ]; then
if [ -e "$DEFAULT_DISPLAY_MANAGER_FILE" ]; then
SERVICE=/lib/systemd/system/$(basename $(cat "$DEFAULT_DISPLAY_MANAGER_FILE")).service
if [ -h "$DEFAULT_SERVICE" ] && [ $(readlink "$DEFAULT_SERVICE") = /dev/null ]; then
echo "Display manager service is masked" >&2
elif [ -e "$SERVICE" ]; then
ln -sf "$SERVICE" "$DEFAULT_SERVICE"
else
echo "WARNING: $SERVICE is the selected default display manager but does not exist" >&2
rm -f "$DEFAULT_SERVICE"
fi
else
rm -f "$DEFAULT_SERVICE"
fi
fi
case "$1" in
configure)
# LP: #1189948
if dpkg --compare-versions "$2" lt "1.7.0-0ubuntu6" ; then
if [ -f /etc/apparmor.d/abstractions/lightdm ]; then
chmod 0644 /etc/apparmor.d/abstractions/lightdm || true
fi
if [ -f /etc/apparmor.d/abstractions/lightdm_chromium-browser ]; then
chmod 0644 /etc/apparmor.d/abstractions/lightdm_chromium-browser || true
fi
fi
;;
esac
# Automatically added by dh_installinit
if [ "$1" = "configure" ] || [ "$1" = "abort-upgrade" ]; then
if [ -x "/etc/init.d/lightdm" ]; then
update-rc.d lightdm defaults >/dev/null || exit $?
fi
fi
# End automatically added section
# Automatically added by dh_installdeb
dpkg-maintscript-helper rm_conffile /etc/lightdm/lightdm.conf.d/50-xserver-command.conf 1.9.5-0ubuntu1 -- "$@"
# End automatically added section
# Automatically added by dh_installdeb
dpkg-maintscript-helper rm_conffile /etc/lightdm/lightdm.conf.d/50-greeter-wrapper.conf 1.9.5-0ubuntu1 -- "$@"
# End automatically added section
# Automatically added by dh_installdeb
dpkg-maintscript-helper rm_conffile /etc/lightdm/lightdm.conf.d/50-guest-wrapper.conf 1.9.5-0ubuntu1 -- "$@"
# End automatically added section
exit 0
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