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
|
package urpm::util;
# $Id$
use strict;
use Exporter;
our @ISA = 'Exporter';
our @EXPORT = qw(quotespace unquotespace
remove_internal_name
reduce_pathname offset_pathname
md5sum untaint
copy_and_own
same_size_and_mtime
difference2 member file_size cat_ dirname basename
);
(our $VERSION) = q($Revision$) =~ /(\d+)/;
#- quoting/unquoting a string that may be containing space chars.
sub quotespace { my $x = $_[0] || ''; $x =~ s/(\s)/\\$1/g; $x }
sub unquotespace { my $x = $_[0] || ''; $x =~ s/\\(\s)/$1/g; $x }
sub remove_internal_name { my $x = $_[0] || ''; $x =~ s/\(\S+\)$/$1/g; $x }
sub dirname { local $_ = shift; s|[^/]*/*\s*$||; s|(.)/*$|$1|; $_ || '.' }
sub basename { local $_ = shift; s|/*\s*$||; s|.*/||; $_ }
#- reduce pathname by removing <something>/.. each time it appears (or . too).
sub reduce_pathname {
my ($url) = @_;
#- clean url to remove any macro (which cannot be solved now).
#- take care if this is a true url and not a simple pathname.
my ($host, $dir) = $url =~ m|([^:/]*://[^/]*/)?(.*)|;
$host = '' if !defined $host;
#- remove any multiple /s or trailing /.
#- then split all components of pathname.
$dir =~ s|/+|/|g; $dir =~ s|/$||;
my @paths = split '/', $dir;
#- reset $dir, recompose it, and clean trailing / added by algorithm.
$dir = '';
foreach (@paths) {
if ($_ eq '..') {
if ($dir =~ s|([^/]+)/$||) {
if ($1 eq '..') {
$dir .= "../../";
}
} else {
$dir .= "../";
}
} elsif ($_ ne '.') {
$dir .= "$_/";
}
}
$dir =~ s|/$||;
$dir ||= '/';
$host . $dir;
}
#- offset pathname by returning the right things to add to a relative directory
#- to make no change. url is needed to resolve going before to top base.
sub offset_pathname {
my ($url, $offset) = map { reduce_pathname($_) } @_;
#- clean url to remove any macro (which cannot be solved now).
#- take care if this is a true url and not a simple pathname.
my (undef, $dir) = $url =~ m|([^:/]*://[^/]*/)?(.*)|;
my @paths = split '/', $dir;
my @offpaths = reverse split '/', $offset;
my @corrections;
my $result = '';
foreach (@offpaths) {
if ($_ eq '..') {
push @corrections, pop @paths;
} else {
$result .= '../';
}
}
$result . join('/', reverse @corrections);
}
sub untaint {
my @r = map { /(.*)/ } @_;
@r == 1 ? $r[0] : @r;
}
sub md5sum {
my ($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 $ctx->hexdigest;
}
}
sub copy {
my ($file, $dest) = @_;
!system("/bin/cp", "-p", "-L", "-R", $file, $dest);
}
sub copy_and_own {
my ($file, $dest_file) = @_;
copy($file, $dest_file) && chown(0, 0, $dest_file) == 1;
}
sub move {
my ($file, $dest) = @_;
rename($file, $dest) || !system("/bin/mv", "-f", $file, $dest);
}
#- file_size is useful to write file_size(...) > 32 without having warnings if file doesn't exist
sub file_size {
my ($file) = @_;
-s $file || 0;
}
sub same_size_and_mtime {
my ($f1, $f2) = @_;
my @sstat = stat $f1;
my @lstat = stat $f2;
$sstat[7] == $lstat[7] && $sstat[9] == $lstat[9];
}
sub difference2 { my %l; @l{@{$_[1]}} = (); grep { !exists $l{$_} } @{$_[0]} }
sub member { my $e = shift; foreach (@_) { $e eq $_ and return 1 } 0 }
sub cat_ { my @l = map { my $F; open($F, '<', $_) ? <$F> : () } @_; wantarray() ? @l : join '', @l }
1;
__END__
=head1 NAME
urpm::util - Misc. utilities subs for urpmi
=head1 SYNOPSIS
=head1 DESCRIPTION
=head1 COPYRIGHT
Copyright (C) 2005 MandrakeSoft SA
Copyright (C) 2005, 2006 Mandriva SA
=cut
|
