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
|
# debsigs: Package signing/verification system, arf module
# AR File manipulation libraries
# Copyright (C) 2000 Progeny Linux Systems, Inc. <jgoerzen@progeny.com>
# Copyright (C) 2009 Peter Pentchev <roam@ringlet.net>
#
# 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
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# 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
package Debian::debsigs::arf;
use strict;
use warnings;
use Cwd;
use Fcntl qw/SEEK_CUR/;
use IO::Pipe;
use IO::Handle;
use Debian::debsigs::forktools ':all';
#my $CVSVERSION = '$Progeny: arf.pm,v 1.11 2001/05/09 11:21:52 epg Exp $'; #'
#my ($VERSION) = $CVSVERSION =~ /^\$Progeny: .+,v ([0-9.]+) /;
our $VERSION = '1.12';
my $ARMAG = "!<arch>\n";
my $SARMAG = length $ARMAG;
sub new {
my ($class, $filename) = @_;
my $self = {};
$self->{filename} = ($filename =~ m'^/') ? $filename :
getcwd() . "/$filename";
$self->{ar} = '/usr/bin/ar';
bless $self, $class;
return $self;
}
sub getfiles {
my ($self, @filenames) = @_;
return forkreader(undef, $self->{ar}, "-p", $self->{filename},
@filenames);
}
# If a data fd is specified, assume that someone already has an fd
# that would like to use for piping in data. Otherwise, generate
# a new one to let them print to.
sub setfile {
my ($self, $filename) = @_;
return(system($self->{ar}, "-r",
$self->{filename}, $filename));
}
# Delete the specified file.
sub delete {
my ($self, $filename) = @_;
return(system($self->{ar}, "-d",
$self->{filename}, $filename));
}
#
sub contents {
my ($self) = @_;
my ($fd, $arpid) =
forkreader(undef, $self->{ar}, "-t", $self->{filename});
my $line;
my @retval;
while (defined($line = <$fd>)) {
chomp $line;
push @retval, $line;
}
assertsuccess($arpid, 'ar -t');
return @retval;
}
sub fixup {
my ($self) = @_;
my ($fd, $buf, $len);
open($fd, '+<', $self->{'filename'}) or
die("Opening $self->{filename} for trailing slash fixup: $!\n");
$len = read($fd, $buf, $SARMAG);
if (!defined($len)) {
die("Reading the ar signature from $self->{filename}: $!\n");
}
if ($len != $SARMAG || $buf ne $ARMAG) {
die("Invalid ar signature at the start of $self->{filename}\n");
}
while (defined($len = read($fd, $buf, 60)) && $len == 60) {
my @fields = unpack("A16A12A6A6A8A10", $buf);
# Strip a slash, with loads and loads of precautions
if ($fields[0] =~ m{/$}) {
seek($fd, -(60 - length($fields[0]) + 1), SEEK_CUR) or
die("Seeking back to the slash for $fields[0] of $self->{filename}: $!\n");
$len = read($fd, $buf, 1);
if (!defined($len) || $len != 1 || $buf ne '/') {
die("Could not seek back to the trailing slash for $fields[0] of $self->{filename}: $!\n");
}
seek($fd, -1, SEEK_CUR) or
die("REALLY Seeking back to the slash for $fields[0] of $self->{filename}: $!\n");
print $fd ' ' or
die("Overwriting the trailing slash for $fields[0] of $self->{filename}: $!\n");
seek($fd, 60 - length($fields[0]), SEEK_CUR) or
die("Seeking to the end of the header for $fields[0] of $self->{filename}: $!\n");
}
# Skip the actual ar data
seek($fd, $fields[5] + ($fields[5] % 2), SEEK_CUR) or
die("Skipping $fields[5] for $fields[0] of $self->{filename}: $!\n");
}
if (!defined($len)) {
die("Could not read the whole archive $self->{filename}: $!\n");
}
close($fd);
return 1;
}
# if ($datafd) {
# return forktools::forkreader($datafd, $self->{ar}, "-r", $self->{filename},
# $filename);
# } else {
# return forktools::forkwriter(undef, $self->{ar}, "-r", $self->{filename},
# $filename);
# }
#}
1;
|
