ArcCheck.pm revision 1.6 
1# ex:ts=8 sw=4:
2# $OpenBSD: ArcCheck.pm,v 1.6 2007/05/02 15:05:29 espie Exp $
3#
4# Copyright (c) 2005-2006 Marc Espie <espie@openbsd.org>
5#
6# Permission to use, copy, modify, and distribute this software for any
7# purpose with or without fee is hereby granted, provided that the above
8# copyright notice and this permission notice appear in all copies.
9#
10# THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
11# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
12# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
13# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
14# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
15# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
16# OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
17
18# Supplementary code to handle archives in the package context.
19# Contrarily to GNU-tar, we do not change the archive format, but by
20# convention,  the names LongName\d+ and LongLink\d correspond to names
21# too long to fit. The actual names reside in the PLIST, but the archive
22# is still a valid archive.
23#
24
25package OpenBSD::Ustar::Object;
26
27# match archive header name against PackingElement item
28sub check_name
29{
30	my ($self, $item) = @_;
31	return 1 if $self->{name} eq $item->{name};
32	if ($self->{name} =~ m/^LongName\d+$/) {
33		$self->{name} = $item->{name};
34		return 1;
35	}
36	return 0;
37}
38
39# match archive header link name against actual link names
40sub check_linkname
41{
42	my ($self, $linkname) = @_;
43	my $c = $self->{linkname};
44	if ($self->isHardLink && defined $self->{cwd}) {
45		$c = $self->{cwd}.'/'.$c;
46	}
47	return 1 if $c eq $linkname;
48	if ($self->{linkname} =~ m/^Long(?:Link|Name)\d+$/) {
49		$self->{linkname} = $linkname;
50		if ($self->isHardLink && defined $self->{cwd}) {
51			$self->{linkname} =~ s|^$self->{cwd}/||;
52		}
53		return 1;
54	}
55	return 0;
56}
57
58# copy long items, avoiding duplicate long names.
59sub copy_long
60{
61	my ($self, $wrarc) = @_;
62	if ($self->{name} =~ m/^LongName(\d+)$/) {
63		$wrarc->{name_index} = $1 + 1;
64	}
65	if (length($self->{name}) > MAXFILENAME+MAXPREFIX+1) {
66		$wrarc->{name_index} = 0 if !defined $wrarc->{name_index};
67		$entry->{name} = 'LongName'.$wrarc->{name_index}++;
68	}
69	$self->copy($wrarc);
70}
71
72package OpenBSD::Ustar;
73
74# prepare item and introduce long names where needed.
75sub prepare_long
76{
77	my ($self, $item) = @_;
78	my $filename = $item->{name};
79	my $entry = $self->prepare($filename);
80	if (!defined $entry->{uname}) {
81		die "No user name for ", $entry->{name}, " (uid ", $entry->{uid}, ")\n";
82	}
83	if (!defined $entry->{gname}) {
84		die "No group name for ", $entry->{name}, " (gid ", $entry->{gid}. "\n";
85	}
86	my ($prefix, $name) = split_name($entry->{name});
87	if (length($name) > MAXFILENAME || length($prefix) > MAXPREFIX) {
88		$self->{name_index} = 0 if !defined $self->{name_index};
89		$entry->{name} = 'LongName'.$self->{name_index}++;
90	}
91	if (length($entry->{linkname}) > MAXLINKNAME) {
92		$self->{linkname_index} = 0 if !defined $self->{linkname_index};
93		$entry->{linkname} = 'LongLink'.$self->{linkname_index}++;
94	}
95	return $entry;
96}
97
981;
99