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#!/usr/bin/perl -w
# Copyright (C) 2003 by Bill Allombert <>
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# GNU General Public License for more details.
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
# based on a design and a bash/gawk script
# Copyright (C) 1998,2000 by Avery Pennarun, for the Debian Project.
# Use, modify, and redistribute modified or unmodified versions in any
# way you wish.
use strict;
use 5.6.0;
my $dpkg_db="/var/lib/dpkg/info";
my $popcon_conf="/etc/popularity-contest.conf";
my %opts=();
# $popcon_conf is in shell-script format
my $HOSTID = qx(unset MY_HOSTID; . $popcon_conf; echo \$MY_HOSTID );
chomp $HOSTID;
if ( $HOSTID eq "")
print STDERR "You must set MY_HOSTID in $popcon_conf!\n";
exit 1;
if ( $HOSTID eq "d41d8cd98f00b204e9800998ecf8427e")
print STDERR "Warning: MY_HOSTID is the md5sum of the empty file!\n";
print STDERR "Please change it to the md5sum of a random file in $popcon_conf!\n";
if ( $HOSTID !~ /^([a-f0-9]{32})$/)
print STDERR "Error: MY_HOSTID does not match ^([a-f0-9]{32})\$\n";
print STDERR "Please edit $popcon_conf to use a valid md5sum value\n";
exit 1;
# Architecture.
my $debarch = `dpkg --print-installation-architecture`;
chomp $debarch;
# Popcon release
my $popconver=`dpkg-query --showformat='\${version}' --show popularity-contest`;
# Initialise time computations
my $now = time;
my $daylen = 24 * 60 * 60;
my $monthlen = $daylen * 30;
my $lastmonth = $now - $monthlen;
my %popcon=();
#Read dpkg database of installed packages
open PACKAGES, "dpkg-query --show --showformat='\${status} \${package}\\n'|";
while (<PACKAGES>)
/^.*installed *(.+)$/ or next;
my $pkg=$1;
open FILES, "$dpkg_db/$pkg.list";
my $bestatime = undef;
while (<FILES>)
m{/bin/|/sbin/|^/usr/games/|\.[ah]$|\.pm$} or next;
-f $_ or next;
= stat;
print STDERR if (!defined($atime));
if (!defined($bestatime) || $atime >= $bestatime)
my $st="";
if ($atime < $lastmonth)
# Not accessed since more than 30 days.
elsif ($ctime > $lastmonth && $atime-$ctime < $daylen)
# Installed/upgraded less than a month ago and not used after
# install/upgrade day.
# Else we `vote' for the package.
close FILES;
# We're not done yet. Sort the output in reverse by atime, and
# add a header/footer.
"ARCH:$debarch POPCONVER:$popconver\n";
for (sort { $popcon{$b}[0] <=> $popcon{$a}[0] } keys %popcon)
print join(' ',@{$popcon{$_}}),"\n";
print "END-POPULARITY-CONTEST-0 TIME:",time,"\n";