preinst is in gpsd 3.4-2.
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 40 41 42 43 44 45 46 47  | #! /bin/sh
# preinst script for gpsd
#
# see: dh_installdeb(1)
set -e
case "$1" in
    install)
    ;;
    upgrade)
	if dpkg --compare-versions "$2" lt 2.34; then
            dpkg-divert --package gpsd --remove --rename \
                        --divert /usr/bin/gpsd.gpsdrive /usr/bin/gpsd || true
            dpkg-divert --package gpsd --remove --rename \
                        --divert /usr/share/man/man1/gpsd.gpsdrive.1.gz \
                                 /usr/share/man/man1/gpsd.1.gz || true
        fi
    ;;
    abort-upgrade)
    ;;
    *)
        echo "preinst called with unknown argument \`$1'" >&2
        exit 1
    ;;
esac
# dh_installdeb will replace this with shell code automatically
# generated by other debhelper scripts.
# Automatically added by dh_installudev
if [ "$1" = install ] || [ "$1" = upgrade ]; then
	if [ -e "/etc/udev/rules.d/z60_gpsd.rules" ]; then
		if [ "`md5sum \"/etc/udev/rules.d/z60_gpsd.rules\" | sed -e \"s/ .*//\"`" = \
		     "`dpkg-query -W -f='${Conffiles}' gpsd | sed -n -e \"\\\\' /etc/udev/rules.d/z60_gpsd.rules '{s/ obsolete$//;s/.* //p}\"`" ]
		then
			rm -f "/etc/udev/rules.d/z60_gpsd.rules"
		fi
	fi
fi
# End automatically added section
exit 0
 |