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package urpm::md5sum; # $Id: md5sum.pm 265136 2010-01-22 12:10:01Z misc $
use strict;
use urpm::util qw(cat_ file_size);
use urpm::msg;
=head1 NAME
urpm::md5sum - Meta-data checking routines for urpmi
=head1 SYNOPSIS
=head1 DESCRIPTION
=over
=cut
=item parse($md5sum_file)
Parse a MD5SUM file.
Returns a hash of file => md5sum
=cut
sub parse {
my ($md5sum_file) = @_;
my %h = map {
my ($md5sum, $file) = m|^([0-9-a-f]+)\s+(?:\./)?(\S+)$|i or return;
$file => $md5sum;
} cat_($md5sum_file) or return;
\%h;
}
=item parse($md5sum_file)
Check size and parse a MD5SUM file.
Returns a hash of file => md5sum
=cut
sub check_file {
my ($md5sum_file) = @_;
file_size($md5sum_file) > 32 && parse($md5sum_file);
}
sub from_MD5SUM__or_warn {
my ($urpm, $md5sums, $basename) = @_;
$md5sums->{$basename} or $urpm->{log}(N("warning: md5sum for %s unavailable in MD5SUM file", $basename));
$md5sums->{$basename};
}
=item versioned_media_info_file($urpm, $medium, $basename)
Returns the latest versionated file name for $basename
=cut
sub versioned_media_info_file {
my ($urpm, $medium, $basename) = @_;
my $md5sums = $medium->{parsed_md5sum} or $urpm->{log}("$medium->{name} has no md5sum"), return;
my @l = map { $md5sums->{$_} eq $md5sums->{$basename} && /^(\d{8}-\d{6})-\Q$basename\E$/ ? $1 : @{[]} } keys %$md5sums;
if (@l == 0) {
$urpm->{debug}("no versioned $basename for medium $medium->{name}") if $urpm->{debug};
} else {
@l > 1 and $urpm->{debug}("multiple versions for $basename for medium $medium->{name}: @l") if $urpm->{debug};
}
$l[0];
}
=item compute($file)
Return the MD5SUM control sum of $file
=cut
sub compute {
my ($file) = @_;
eval { require Digest::MD5 };
if ($@) {
#- Use an external command to avoid depending on perl
return (split ' ', `/usr/bin/md5sum '$file'`)[0];
} else {
my $ctx = Digest::MD5->new;
open my $fh, $file or return '';
$ctx->addfile($fh);
close $fh;
return $ctx->hexdigest;
}
}
1;
__END__
=back
=head1 COPYRIGHT
Copyright (C) 2005 MandrakeSoft SA
Copyright (C) 2005-2010 Mandriva SA
=cut
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