This file is indexed.

/usr/sbin/debfoster2aptitude is in debfoster 2.7-2.

This file is owned by root:root, with mode 0o755.

The actual contents of the file can be viewed below.

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#! /usr/bin/perl -w

use strict;
use utf8;

system qw(debfoster
	-o MaxPriority=required
	-o UseHold=no
	-o UsePreDepends=yes
	-o UseRecommends=no
	-o UseSuggests=no
	-o UseEssential=no
	-o UseTasks=no
	-o KeepSections=
	-o NokeepSections=
	-o GuessDepends=no) and die;

my %debfoster;

open KEEPERS, '<', '/var/lib/debfoster/keepers'
	or die "/var/lib/debfoster/keepers: $!";

while(<KEEPERS>) {
	next if /^-/;
	chomp;
	undef $debfoster{$_}
}

close KEEPERS or die $!;

open PKG, '<', '/var/lib/aptitude/pkgstates'
	or die "/var/lib/aptitude/pkgstates: $!";

open NEW, '>', '/var/lib/aptitude/pkgstates.new'
	or die "/var/lib/aptitude/pkgstates.new: $!";

my $name;

while(<PKG>) {
	$name = $1 if /^Package:\s+(\S+)/;

	if(/Last-Change:/) {
		$_ = 'Last-Change: '.(exists $debfoster{$name} ? 0 : 1)."\n"
	}
	print NEW
		or die "/var/lib/aptitude/pkgstates.new: $!";
}

close NEW or die $!;
close PKG or die $!;

rename '/var/lib/aptitude/pkgstates.new', '/var/lib/aptitude/pkgstates'
	or die "rename(/var/lib/aptitude/pkgstates): $!"