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
|
#!/usr/bin/perl
# perl script originally by hallon@debian.org, much faster than sed & sh.
#
# modified by cas to pipe its output through frcode and then > to the
# db file.
#
# caching of .list timestamps and re-use of old locatedb data added by
# Pawel Chmielowski <prefiks@prefiks.org>, see Bug #457572
# 2009-05-30 Craig Sanders <cas@taz.net.au>
# - rewrote script to output a plain text listing rather than use frcode
#
# 2009-06-03 # Craig Sanders <cas@taz.net.au>
# - added optional support for compressing /var/lib/dlocatedb
use strict;
use warnings;
use File::Basename;
my $program = basename($0);
my $dbfile = '/var/lib/dlocate/dlocatedb';
my $stampsfile = '/var/lib/dlocate/dlocatedb.stamps';
#my $dbfile = '/tmp/dlocate';
#my $stampsfile = '/tmp/dlocate.stamps';
my $infodir = '/var/lib/dpkg/info';
my $compress = 0;
my $defaults = '/etc/default/dlocate';
if (open my $defaults_fh, '<', $defaults) {
while (<$defaults_fh>) {
chomp;
s/#.*|^\s*|\s*$//g;
next if (/^$/);
s/\s|"//g;
my ($key, $val) = split /=/;
if ($key eq 'COMPRESS_DLOCATE') {
$compress = $val;
}
}
close $defaults_fh;
}
my (%old_stamps, %stamps);
if (open my $stamps_fh, '<', $stampsfile) {
while (<$stamps_fh>) {
chomp;
my ($stamp, $file) = split /:/, $_, 2;
$old_stamps{$file} = $stamp;
}
close $stamps_fh;
}
open my $dbnew_fh, '>', "$dbfile.new"
or die "$program: couldn't open $dbfile.new for write: $!\n";
opendir my $dir_dh, $infodir
or die "$program: can't open directory $infodir: $!\n";
while (defined(my $pkg = readdir $dir_dh)) {
next unless $pkg =~ s/\.list$// and -s "$infodir/$pkg.list";
$stamps{$pkg} = (stat(_))[10]; # ctime
}
closedir $dir_dh;
my @new_pkgs;
my %processed;
chdir $infodir;
if (%old_stamps and open my $db_fh, '<', $dbfile) {
while (<$db_fh>) {
my ($pkg) = /^(\S+?):/;
if (not defined $pkg) {
# Skip diversion lines.
next;
} elsif (not exists $stamps{$pkg}) {
# skip packages which are no longer installed
} elsif (exists $old_stamps{$pkg} and
$stamps{$pkg} == $old_stamps{$pkg}) {
print { $dbnew_fh } $_;
} elsif (not exists $processed{$pkg}) {
open my $files_fh, '<', "$pkg.list"
or die "$program: can't open file $pkg.list: $!\n";
while (<$files_fh>) {
print { $dbnew_fh } "$pkg: $_";
}
close $files_fh;
}
$processed{$pkg} = 1;
}
close $db_fh;
my %tmp = %stamps;
delete $tmp{$_} for keys %processed;
@new_pkgs = keys %tmp;
} else {
@new_pkgs = keys %stamps;
}
foreach my $pkg (@new_pkgs) {
open my $files_fh, '<', "$pkg.list"
or die "$program: can't open new $pkg.list for read: $!\n";
while (<$files_fh>) {
print { $dbnew_fh } $pkg, ': ', $_;
}
close $files_fh;
}
# append diversions info to dlocatedb
my $divpipe = 'dpkg-divert --list \*';
open my $diversion_fh, "-|", $divpipe
or die "$program: can't open pipe from '$divpipe': $!\n";
while (<$diversion_fh>) {
print { $dbnew_fh } $_;
}
close $diversion_fh;
close $dbnew_fh;
# Create a backup to the database before replacing it with the new database.
# This is effectively two rename's done atomically.
if (-e $dbfile) {
unlink("$dbfile.old") if (-e "$dbfile.old");
link($dbfile, "$dbfile.old") if (-e $dbfile);
}
rename("$dbfile.new", $dbfile);
# optionally compress dlocatedb
if ($compress eq "1") {
system('gzip', '--quiet', '--force', $dbfile);
rename("$dbfile.gz", $dbfile);
}
open my $stamps_fh, '>', "$stampsfile.new"
or die "$program: can't create stamps file $stampsfile.new: $!\n";
print { $stamps_fh } "$stamps{$_}:$_\n" for keys %stamps;
close $stamps_fh;
if (-e $stampsfile) {
unlink($stampsfile);
}
rename("$stampsfile.new", $stampsfile);
|
