postinst is in armagetronad-dedicated 0.2.8.3.3-2.
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  | #!/bin/sh
set -e
# Create armagetronad user if it isn't already there.
if [ ! `getent passwd armagetronad` > /dev/null ]
then
    echo 'Adding system user for armagetronad' 1>&2
    adduser --system --quiet --disabled-password --shell /bin/false --home /var/games/armagetronad --ingroup games armagetronad
else
    # If armagetronad user still exists, then make sure that the home directory
    # is created again
    mkdir -p /var/games/armagetronad
    chown -R armagetronad:games /var/games/armagetronad
fi
# Automatically added by dh_systemd_enable
# This will only remove masks created by d-s-h on package removal.
deb-systemd-helper unmask armagetronad-dedicated.service >/dev/null || true
# was-enabled defaults to true, so new installations run enable.
if deb-systemd-helper --quiet was-enabled armagetronad-dedicated.service; then
	# Enables the unit on first installation, creates new
	# symlinks on upgrades if the unit file has changed.
	deb-systemd-helper enable armagetronad-dedicated.service >/dev/null || true
else
	# Update the statefile to add new symlinks (if any), which need to be
	# cleaned up on purge. Also remove old symlinks.
	deb-systemd-helper update-state armagetronad-dedicated.service >/dev/null || true
fi
# End automatically added section
# Automatically added by dh_installinit
if [ -x "/etc/init.d/armagetronad-dedicated" ]; then
	update-rc.d armagetronad-dedicated defaults >/dev/null
fi
if [ -x "/etc/init.d/armagetronad-dedicated" ] || [ -e "/etc/init/armagetronad-dedicated.conf" ]; then
	invoke-rc.d armagetronad-dedicated start || exit $?
fi
# End automatically added section
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