Current File : //usr/share/perl5/Debconf/DbDriver/Directory.pm
#!/usr/bin/perl
# This file was preprocessed, do not edit!
package Debconf::DbDriver::Directory;
use warnings;
use strict;
use Debconf::Log qw(:all);
use IO::File;
use POSIX ();
use Fcntl qw(:DEFAULT :flock);
use Debconf::Iterator;
use base 'Debconf::DbDriver::Cache';
use fields qw(directory extension lock format);
sub init {
my $this=shift;
$this->{extension} = "" unless exists $this->{extension};
$this->{format} = "822" unless exists $this->{format};
$this->{backup} = 1 unless exists $this->{backup};
$this->error("No format specified") unless $this->{format};
eval "use Debconf::Format::$this->{format}";
if ($@) {
$this->error("Error setting up format object $this->{format}: $@");
}
$this->{format}="Debconf::Format::$this->{format}"->new;
if (not ref $this->{format}) {
$this->error("Unable to make format object");
}
$this->error("No directory specified") unless $this->{directory};
if (exists $this->{root}) {
$this->{directory} = $this->{root} . $this->{directory};
}
if (not -d $this->{directory} and not $this->{readonly}) {
mkdir $this->{directory} ||
$this->error("mkdir $this->{directory}:$!");
}
if (not -d $this->{directory}) {
$this->error($this->{directory}." does not exist");
}
debug "db $this->{name}" => "started; directory is $this->{directory}";
if (! $this->{readonly}) {
open ($this->{lock}, ">", $this->{directory}."/.lock") or
$this->error("could not lock $this->{directory}: $!");
while (! flock($this->{lock}, LOCK_EX | LOCK_NB)) {
next if $! == &POSIX::EINTR;
$this->error("$this->{directory} is locked by another process: $!");
last;
}
}
}
sub load {
my $this=shift;
my $item=shift;
debug "db $this->{name}" => "loading $item";
my $file=$this->{directory}.'/'.$this->filename($item);
return unless -e $file;
my $fh=IO::File->new;
open($fh, "<", $file) or $this->error("$file: $!");
$this->cacheadd($this->{format}->read($fh));
close $fh;
}
sub save {
my $this=shift;
my $item=shift;
my $data=shift;
return unless $this->accept($item);
return if $this->{readonly};
debug "db $this->{name}" => "saving $item";
my $file=$this->{directory}.'/'.$this->filename($item);
my $fh=IO::File->new;
if ($this->ispassword($item)) {
sysopen($fh, $file."-new", O_WRONLY|O_TRUNC|O_CREAT, 0600)
or $this->error("$file-new: $!");
}
else {
open($fh, ">", "$file-new") or $this->error("$file-new: $!");
}
$this->{format}->beginfile;
$this->{format}->write($fh, $data, $item)
or $this->error("could not write $file-new: $!");
$this->{format}->endfile;
$fh->flush or $this->error("could not flush $file-new: $!");
$fh->sync or $this->error("could not sync $file-new: $!");
close $fh or $this->error("could not close $file-new: $!");
if (-e $file && $this->{backup}) {
rename($file, $file."-old") or
debug "db $this->{name}" => "rename failed: $!";
}
rename("$file-new", $file) or $this->error("rename failed: $!");
}
sub shutdown {
my $this=shift;
$this->SUPER::shutdown(@_);
delete $this->{lock};
return 1;
}
sub exists {
my $this=shift;
my $name=shift;
my $incache=$this->SUPER::exists($name);
return $incache if not defined $incache or $incache;
return -e $this->{directory}.'/'.$this->filename($name);
}
sub remove {
my $this=shift;
my $name=shift;
return if $this->{readonly} or not $this->accept($name);
debug "db $this->{name}" => "removing $name";
my $file=$this->{directory}.'/'.$this->filename($name);
unlink $file or return;
if (-e $file."-old") {
unlink $file."-old" or return;
}
return 1;
}
sub accept {
my $this=shift;
my $name=shift;
return if $name=~m#\.\./# or $name=~m#/\.\.#;
$this->SUPER::accept($name, @_);
}
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