138 lines
2.7 KiB
Perl
138 lines
2.7 KiB
Perl
# ex:ts=8 sw=4:
|
|
# $OpenBSD: Locks.pm,v 1.11 2011/12/03 11:03:07 espie Exp $
|
|
#
|
|
# Copyright (c) 2010 Marc Espie <espie@openbsd.org>
|
|
#
|
|
# Permission to use, copy, modify, and distribute this software for any
|
|
# purpose with or without fee is hereby granted, provided that the above
|
|
# copyright notice and this permission notice appear in all copies.
|
|
#
|
|
# THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
|
|
# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
|
|
# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
|
|
# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
|
|
# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
|
|
# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
|
|
# OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
|
|
|
|
use strict;
|
|
use warnings;
|
|
|
|
package DPB::Locks;
|
|
|
|
use File::Path;
|
|
use Fcntl;
|
|
|
|
sub new
|
|
{
|
|
my ($class, $lockdir) = @_;
|
|
|
|
File::Path::make_path($lockdir);
|
|
bless {lockdir => $lockdir}, $class;
|
|
}
|
|
|
|
sub build_lockname
|
|
{
|
|
my ($self, $f) = @_;
|
|
$f =~ tr|/|.|;
|
|
return "$self->{lockdir}/$f";
|
|
}
|
|
|
|
sub lockname
|
|
{
|
|
my ($self, $v) = @_;
|
|
return $self->build_lockname($v->lockname);
|
|
}
|
|
|
|
sub dolock
|
|
{
|
|
my ($self, $name, $v) = @_;
|
|
if (sysopen my $fh, $name, O_CREAT|O_EXCL|O_WRONLY, 0666) {
|
|
DPB::Util->make_hot($fh);
|
|
print $fh "locked=", $v->logname, "\n";
|
|
$v->print_parent($fh);
|
|
return $fh;
|
|
} else {
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
sub lock
|
|
{
|
|
my ($self, $v) = @_;
|
|
my $lock = $self->lockname($v);
|
|
my $fh = $self->dolock($lock, $v);
|
|
if ($fh) {
|
|
return $fh;
|
|
}
|
|
return undef;
|
|
}
|
|
|
|
sub unlock
|
|
{
|
|
my ($self, $v) = @_;
|
|
unlink($self->lockname($v));
|
|
}
|
|
|
|
sub locked
|
|
{
|
|
my ($self, $v) = @_;
|
|
return -e $self->lockname($v);
|
|
}
|
|
|
|
sub recheck_errors
|
|
{
|
|
my ($self, $engine) = (@_);
|
|
|
|
for my $name (qw(errors locks)) {
|
|
my $e = $engine->{$name};
|
|
$engine->{$name} = [];
|
|
while (my $v = shift @$e) {
|
|
if ($v->unlock_conditions($engine)) {
|
|
$self->unlock($v);
|
|
$v->requeue($engine);
|
|
next;
|
|
}
|
|
if ($self->locked($v)) {
|
|
push(@{$engine->{$name}}, $v);
|
|
} else {
|
|
if ($name eq 'errors') {
|
|
$engine->rescan($v);
|
|
} else {
|
|
$v->requeue($engine);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
sub find_dependencies
|
|
{
|
|
my ($self, $hostname) = @_;
|
|
opendir(my $dir, $self->{lockdir});
|
|
my $h = {};
|
|
while (my $name = readdir($dir)) {
|
|
my $fullname = $self->{lockdir}."/".$name;
|
|
next if -d $fullname;
|
|
next if $name =~ m/^host:/;
|
|
open(my $f, '<', $fullname);
|
|
my $host;
|
|
my @d;
|
|
while (<$f>) {
|
|
if (m/^host=(.*)/) {
|
|
$host = $1;
|
|
} elsif (m/^needed=(.*)/) {
|
|
@d = split(/\s/, $1);
|
|
}
|
|
}
|
|
if (defined $host && $host eq $hostname) {
|
|
for my $k (@d) {
|
|
$h->{$k} = 1;
|
|
}
|
|
}
|
|
}
|
|
return sort keys %$h;
|
|
}
|
|
|
|
1;
|