preinst is in comixcursors-righthanded-opaque 0.7.2-3.
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 | #! /bin/sh
# Pre-install script for ‘comixcursors-righthanded-opaque’.
#
# Manpage: ‘dh_installdeb(1)’
set -e
# Summary of ways this script can be called:
#        * <new-preinst> `install'
#        * <new-preinst> `install' <old-version>
#        * <new-preinst> `upgrade' <old-version>
#        * <old-preinst> `abort-upgrade' <new-version>
# For details, see <URL:http://www.debian.org/doc/debian-policy/> or
# the ‘debian-policy’ package.
REMOVED_LIST=""
ICONDIR=/etc/X11/cursors
remove_omitted_alternatives () {
    # Remove themes installed by previous versions but omitted
    # from this version of the package.
    if ! update-alternatives --quiet --list x-cursor-theme ; then
        # No alternatives installed for ‘x-cursor-theme’, so we're
        # done. We need to test this explicitly to avoid exiting with
        # an error when listing the alternatives.
        return
    fi
    installed_cursor_themes=`update-alternatives --list x-cursor-theme`
    for theme in $REMOVED_LIST ; do
        if echo "$installed_cursor_themes" | grep -q $theme ; then
            update-alternatives --remove $ICONDIR/$theme
            rm -f $ICONDIR/$theme
        fi
    done
}
case "$1" in
    upgrade)
        remove_omitted_alternatives
        ;;
    install|abort-upgrade)
        ;;
    *)
        printf "preinst called with unknown argument ‘%s’\n" "$1" >&2
        exit 1
        ;;
esac
# dh_installdeb will replace this with shell code automatically
# generated by other debhelper scripts.
exit 0
 |