AC-DC
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lib/AC/ConfigFile/Simple.pm view on Meta::CPAN
# -*- perl -*-
# Copyright (c) 2008 by AdCopy
# Author: Jeff Weisberg
# Created: 2008-Dec-19 10:12 (EST)
# Function: read simple config file
#
# $Id$
# file:
# keyword value
# ...
package AC::ConfigFile::Simple;
use AC::Misc;
use AC::DC::Debug;
use Socket;
use strict;
my $MINSTAT = 15;
my %CONFIG = (
include => \&include_file,
debug => \&parse_debug,
allow => \&parse_allow,
_default => \&parse_keyvalue,
);
sub new {
my $class = shift;
my $file = shift;
my $me = bless {
_laststat => $^T,
_lastconf => $^T,
_configfile => $file,
_files => [ ],
@_,
}, $class;
$me->_read();
return $me;
}
sub check {
my $me = shift;
my $now = $^T;
return if $now - $me->{_laststat} < $MINSTAT;
$me->{_laststat} = $now;
my $changed;
for my $file ( @{$me->{_files}} ){
my $mtime = (stat($file))[9];
$changed = 1 if $mtime > $me->{_lastconf};
}
return unless $changed;
verbose("config file changed. reloading");
$me->{_lastconf} = $now;
eval {
$me->_read();
verbose("installed new config file");
if( my $f = $me->{onreload} ){
$f->();
}
};
if(my $e = $@){
problem("error reading new config file: $e");
return;
}
return 1;
}
sub _read {
my $me = shift;
delete $me->{_pending};
$me->_readfile($me->{_configfile});
$me->{config} = $me->{_pending};
delete $me->{_pending};
}
sub _readfile {
my $me = shift;
my $file = shift;
my $fd;
open($fd, $file) || die "cannot open file '$file': $!";
$me->{fd} = $fd;
push @{$me->{_files}}, $file;
while( defined(my $l = $me->_nextline()) ){
my($key, $rest) = split /\s+/, $l, 2;
$me->handle_config( $key, $rest ) || die "invalid config '$key'\n";
}
close $fd;
}
sub handle_config {
my $me = shift;
my $key = shift;
my $rest = shift;
my $fnc = $CONFIG{$key} || $CONFIG{_default};
return unless $fnc;
$fnc->($me, $key, $rest);
return 1;
}
sub _nextline {
my $me = shift;
my $line;
while(1){
my $fd = $me->{fd};
my $l = <$fd>;
return $line unless defined $l;
chomp $l;
$l =~ s/\#.*$//;
$l =~ s/^\s*//;
$l =~ s/\s+$//;
next if $l =~ s/^\s*$/; #/;
$line .= $l;
if( $line =~ /\\$/ ){
chop $line;
next;
}
return $line;
}
}
################################################################
sub include_file {
my $me = shift;
my $key = shift;
my $file = shift;
$file =~ s/^"(.*)"$/$1/;
if( $file !~ m|^/| ){
# add path from main config file
my($path) = $me->{_configfile} =~ m|(.*)/[^/]+$|;
$file = "$path/$file" if $path;
}
my $fd = $me->{fd};
$me->_readfile($file);
$me->{fd} = $fd;
}
sub parse_keyvalue {
my $me = shift;
my $key = shift;
my $value = shift;
problem("parameter '$key' redefined") if $me->{_pending}{$key};
$me->{_pending}{$key} = $value;
}
sub parse_keyarray {
my $me = shift;
my $key = shift;
my $value = shift;
push @{$me->{_pending}{$key}}, $value;
}
sub parse_allow {
my $me = shift;
my $key = shift;
my $acl = shift;
my($host, $len) = split m|/|, $acl;
$host ||= $acl;
$len ||= 32;
push @{$me->{_pending}{acl}}, [ inet_aton($host), inet_lton($len) ];
}
sub parse_debug {
my $me = shift;
my $key = shift;
my $value = shift;
$me->{_pending}{debug}{$value} = 1;
}
################################################################
sub config {
my $me = shift;
return $me->{config};
}
sub get {
my $me = shift;
my $k = shift;
return $me->{config}{$k};
}
sub check_acl {
my $me = shift;
my $ip = shift; # ascii
my $ipn = inet_aton($ip);
for my $acl ( @{$me->{config}{acl}} ){
my($net, $mask) = @$acl;
return 1 if ($ipn & $mask) eq $net;
}
return 0;
}
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