This file is indexed.

postinst is in wireless-tools 30~pre9-5ubuntu2.

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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#!/bin/sh -e

mv_conffile() {
	local OLDCONFFILE="$1"
	local NEWCONFFILE="$2"

	[ -e "$OLDCONFFILE" ] || return 0

	echo "Preserving user changes to $NEWCONFFILE ..."
	mv -f "$NEWCONFFILE" "$NEWCONFFILE".dpkg-new
	mv -f "$OLDCONFFILE" "$NEWCONFFILE"
}

case "$1" in
configure)
	if dpkg --compare-versions "$2" le "30~pre9-2"; then
		mv_conffile "/etc/network/if-up.d/wireless-tools" "/etc/network/if-pre-up.d/wireless-tools"
		mv_conffile "/etc/network/if-down.d/wireless-tools" "/etc/network/if-post-down.d/wireless-tools"
	fi
esac