#!/usr/bin/perl -w
#
# Copyright (C) 2006 Rodolphe Quiedeville <rodolphe@quiedeville.org>
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License
# as published by the Free Software Foundation; version 2 dated June,
# 1991.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
#
# If you improve this script please send your version to my email address
# with the copyright notice upgrade with your name.
#
# Wildcard-plugin to monitor the ccache stats. To monitor an
# user cache, link ccache_files_<user> to this file. E.g.
#
#    ln -s /usr/share/munin/plugins/ccache_files_ /etc/munin/plugins/ccache_files_loic
#
# ...will monitor loic number of files in ccache.
#
# $Log$
# Revision 1.0  2006/04/29 14:12:19  rodo
# Created by Rodolphe Quiedeville
#
# Configurable variables
#
# 	ccache          - Override default ccache command
# 	ccache_dir      - Override default cache dir
#
# Magic markers (optinal - used by munin-config and some installation
# scripts):
#
#%# family=compilation
#%# capabilities=autoconf

use strict;

$0 =~ /ccache_files_(.+)*$/;
my $user = $1;
exit 2 unless defined $user;

$ENV{CCACHE_DIR} = exists $ENV{'ccache_dir'} ? $ENV{'ccache_dir'} : "/home/$user/.ccache";

my $CCACHE = exists $ENV{'ccache'} ? $ENV{'ccache'} : "/usr/bin/ccache";

(-d $ENV{CCACHE_DIR}) || die "Can't open $ENV{CCACHE_DIR}\n";
(-x $CCACHE) || die "Can't exec $CCACHE\n";

# cache directory                     /home/rodo/.ccache
# files in cache                        45
# max files                             30

my %WANTED = ( "max files" => "max",
	       "files in cache"  => "files",
	       );

my %DATAS = ( "max files" => 0,
	      "files in cache"  => 0,
	       );

my $cache = "$CCACHE -s";

open(CCH, "$cache|") or exit 4;
while (<CCH>)
{
    my ($k, $v) = (/(.*)\s+(\d+)$/);
    next unless ($k);
    $k =~ s/\s+$//;

    $DATAS{$k} = $v if (exists $WANTED{$k});
}
close(CCH);

my $files_warn = int($DATAS{"max files"} * 0.9);
my $files_crit = int($DATAS{"max files"} * 0.95);

if ($ARGV[0] and $ARGV[0] eq "config" ){
    print "graph_title ccache files for $user\n";
    print "graph_args --base 1000 -l 0\n";
    print "graph_scale yes\n";
    print "graph_vlabel files\n";
    print "graph_category compilation\n";
    print "graph_order files max\n";
    print 'graph_info Plugin available at <a href="http://rodolphe.quiedeville.org/hack/munin/">http://rodolphe.quiedeville.org/hack/munin/</a>'."\n";

    print "max.label max files\n";
    print "max.info Unlimited\n" if ($DATAS{'max files'} == 0);
    print "files.label files in cache\n";
    print "files.draw AREA\n";
    print "files.warning $files_warn\n" if ($DATAS{'max files'} > 0);
    print "files.critical $files_crit\n" if ($DATAS{'max files'} > 0);

    exit 0;
}

print "max.value ".$DATAS{'max files'}."\n";
print "files.value ".$DATAS{'files in cache'}."\n";