Current File : //proc/self/root/usr/share/perl5/Munin/Master/Logger.pm
package Munin::Master::Logger;
# $Id$
=encoding utf-8
=head1 NAME
Munin::Master::Logger - Munin master's old logging routines
=head1 SYNOPSIS
This module contains Munin master's old logging routines while we're
switching to Log::Log4perl. It also sets up Log4perl according to our
needs.
Do not use "logger" when writing new code, use the
Log::Log4perl :easy API. This module takes care of initializing
Log::Log4perl at load time.
=head1 SUBROUTINES
=over
=item B<logger_open>
needs to be called once in the main program with one argument: The
directory where the munin logs goes. The running programs name ($0)
will be used as the log name (e.g. munin-graph.log).
=item B<logger>
Do not use.
=item B<logger_level>
Use to set the programs log level to debug, info, warn, error,
or fatal. This corresponds to the log levels used in syslog, but
syslog is not used for logging.
=item B<logger_debug>
Set up DEBUG logging. Both STDOUT and the log file will receive DEBUG
level output.
=back
=head1 AUTHOR
Munin master logging ported to Log4perl by Nicolai Langfeldt. Split
out into this module by Kjell Magne Øierud.
=head1 LICENSE
GPLv2
=cut
use base qw(Exporter);
use strict;
use warnings;
use Carp qw(confess);
use English qw(-no_match_vars);
use File::Basename qw(basename);
use Log::Log4perl qw(:easy);
our @EXPORT = qw(logger_open logger_open_stderr logger_debug logger_level logger);
# Early open of the log. Warning and more urgent messages will go to
# screen.
Log::Log4perl->easy_init( $WARN );
my $logdir = undef;
my $logopened = 0;
my $me = $1 if basename($PROGRAM_NAME) =~ m/(.*)/; # Fast untaint $PROGRAM_NAME
sub _warn_catcher {
if ($logopened) {
WARN "[PERL WARNING] ".join(" ",@_);
} else {
print STDERR join(" ",@_);
}
}
sub logger_open_stderr {
if (!$logopened) {
# I'm a bit uncertain about the :utf8 bit.
Log::Log4perl->easy_init( { level => $INFO,
file => ":utf8>&STDERR" } );
$logopened = 1;
}
get_logger('')->debug("Opened log file");
# Get perl warnings into the log files
$SIG{__WARN__} = \&_warn_catcher;
}
sub logger_open {
# This is called when we have a directory and file name to log in.
my $dirname = shift;
$logdir=$dirname;
if (!defined($dirname)) {
confess("In logger_open, directory for log files undefined");
}
my $log_filename = shift || "$dirname/$me.log";
if (!$logopened) {
# I'm a bit uncertain about the :utf8 bit.
Log::Log4perl->easy_init( { level => $INFO,
file => ":utf8>>$log_filename" } );
# warn "Logging to $dirname/$me.log";
$logopened = 1;
}
get_logger('')->debug("Opened log file");
# Get perl warnings into the log files
$SIG{__WARN__} = \&_warn_catcher;
}
sub logger_debug {
# Adjust log level to DEBUG if user gave --debug option
my $logger = get_logger('');
WARN "Setting log level to DEBUG\n";
if (defined($logdir)) {
Log::Log4perl->easy_init( { level => $DEBUG,
file => ":utf8>>$logdir/$me.log" },
{ level => $DEBUG,
file => "STDERR" } );
} else {
# If we do not have a log file name to log to just send
# everything to STDERR
Log::Log4perl->easy_init( { level => $DEBUG,
file => "STDERR" } );
}
# And do not open the loggers again now.
$logopened=1;
}
sub logger_level {
my ($loglevel) = @_;
my $logger = get_logger('');
$loglevel = lc $loglevel;
my %level_map = (
debug => $DEBUG,
info => $INFO,
warn => $WARN,
error => $ERROR,
fatal => $FATAL,
);
unless ($level_map{$loglevel}) {
ERROR "Unknown log level: '$loglevel'\n";
return;
}
$logger->level($level_map{$loglevel});
INFO "Setting log level to $loglevel\n";
}
sub logger {
my ($comment) = @_;
INFO @_;
}
1;
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