postinst is in slim 1.3.6-4.
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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set -e
. /usr/share/debconf/confmodule
THIS_PACKAGE=slim
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 "$DEFAULT_DISPLAY_MANAGER_FILE" ]; then
if db_get shared/default-x-display-manager; then
# workaround debconf passthru bug (#379198)
if [ -z "$RET" ]; then
$RET="$THIS_PACKAGE"
fi
if [ "$THIS_PACKAGE" != "$RET" ]; then
echo "Please be sure to run \"dpkg --configure $RET\"."
fi
if db_get "$RET"/daemon_name; then
echo "$RET" > $DEFAULT_DISPLAY_MANAGER_FILE
fi
fi
fi
# remove the displaced old default display manager file if it exists
if [ -e "$DEFAULT_DISPLAY_MANAGER_FILE.dpkg-tmp" ]; then
rm "$DEFAULT_DISPLAY_MANAGER_FILE.dpkg-tmp"
fi
# debconf hangs if slim gets started below without this
db_stop || true
# update-rc.d levels
S=30
K=01
if [ -x /etc/init.d/slim ]; then
update-rc.d slim defaults $S $K >/dev/null 2>&1
fi
if [ "$1" = "configure" ];
then
invoke-rc.d dbus reload || true
fi
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
exit 0
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