This file is indexed.

preinst is in binutils-multiarch 2.26.1-1ubuntu1~16.04.8.

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
set -e
new_ver=2.26.1-1ubuntu1~16.04.8; # this version
context=$1; # why to install (install, upgrade, or abort-upgrade)
old_ver=$2; # version being replaced, if any

diversion() {
	local added_ver divertto file
	added_ver=$1
	file=$2
	divertto=${3-$file.single}

	if
		test "$context" = install ||
		dpkg --compare-versions "$old_ver" lt "$added_ver" ||
		dpkg --compare-versions "$new_ver" le "$old_ver"
	then
		dpkg-divert --package binutils-multiarch \
			--add --rename --divert "$divertto" "$file"
	fi
}

for prog in nm objdump objcopy strings strip size \
            ar ranlib addr2line gprof readelf
do
	diversion 2.9.5.0.16-1 "/usr/bin/$prog"
done