/usr/share/perl5/Grid/GPT/MD5.pm is in grid-packaging-tools 3.6.7-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 | package Grid::GPT::MD5;
$VERSION = 1.00;
use strict;
use vars qw( $AUTOLOAD @ISA @EXPORT ); # Keep 'use strict' happy
use Carp;
require Exporter;
require AutoLoader;
require Grid::GPT::GPTObject;
@ISA = qw(Exporter AutoLoader Grid::GPT::GPTObject);
# Items to export into callers namespace by default. Note: do not export
# names by default without a very good reason. Use EXPORT_OK instead.
# Do not simply export all your public functions/methods/constants.
@EXPORT = qw(
);
#
# include standard modules
#
require Digest::MD5;
#
# data internal to the class
#
my $_count = 0;
#
# Class methods
#
sub get_count
{
$_count;
}
sub _incr_count { ++$_count }
sub _decr_count { --$_count }
### new( $caller, %args )
#
# Object Constructor
#
sub new
{
my $caller = shift;
my(%args) = @_;
my $caller_is_obj = ref($caller);
my $class = $caller_is_obj || $caller;
#
# bless $self and up the ref count
#
my $self = bless {}, $class;
if ( scalar(@_) == 0 )
{
$self->_incr_count();
return $self;
}
#
# handle arguments
#
$self->_incr_count();
return $self;
}
sub DESTROY
{
$_[0]->_decr_count();
}
sub AUTOLOAD {
use vars qw($AUTOLOAD);
my $self = shift;
my $type = ref($self) || croak "$self is not an obj";
my $name = $AUTOLOAD;
$name =~ s/.*://; # strip fully-qualified portion
unless (exists $self->{$name} ) {
croak "Can't access `$name' field in obj of class $type";
}
if (@_) {
return $self->{$name} = shift;
} else {
return $self->{$name};
}
}
END { }
#
# Standard methods
#
sub compare
{
my $self = shift;
my(%args) = @_;
my( $ctx, $files );
my( $cksum_curr, $cksum_last );
$ctx = new Digest::MD5();
$files = $args{'files'};
for my $file (@$files)
{
$cksum_curr = $self->checksum(file => $file);
if ( defined($cksum_last) && ( length($cksum_last) > 0 ) )
{
if ( $cksum_curr != $cksum_last )
{
return 0;
}
}
$cksum_last = $cksum_curr;
}
return 1;
}
sub checksum
{
my $self = shift;
my(%args) = @_;
my($ctx, $file);
$ctx = new Digest::MD5();
$file = $args{'file'};
open(FILE, $file);
binmode(FILE);
$ctx->addfile(*FILE);
return $ctx->hexdigest();
}
1; # Ensure that the module can be successfully use'd
__END__
=head1 NAME
Grid::GPT::MD5 - Perl extension for computing MD5 checksums.
=head1 SYNOPSIS
use Grid::GPT::MD5;
my $md5 = new Grid::GPT::MD5();
#
# returns the MD5 checksum of the file associated with given path
#
my $checksum = $md5->checksum( file => $file );
=head1 DESCRIPTION
I<Grid::GPT::MD5> is a wrapper class around the MD5 mechanism chosen
for release with GPT. In case there is some issue with this mechanism,
or it needs to be replaced, all calls into it happen here first, and
allow us (the GPT developers) greater control over the backend MD5
functionality.
=head1 AUTHOR
Chase Phillips <cphillip@ncsa.uiuc.edu>
=head1 SEE ALSO
perl(1) Grid::GPT::PackageFile(1) Digest::MD5(1)
=cut
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