#!/bin/sh
# -*- sh -*-

: << =cut

=head1 NAME

apache_memory - Indicate the medium size of all the apache child process

=head1 CONFIGURATION

 [apache_*]
 env.apuser user_running_apache (default: "www-data")
 env.binname apache_binary_name (default: "apache2")


=head1 AUTHOR

Ricardo Fraile <rfrail3@yahoo.es>

=head1 LICENSE

GPLv2

=head1 MAGICK MARKERS

 #%# family=auto
 #%# capabilities=autoconf

=cut

. "$MUNIN_LIBDIR/plugins/plugin.sh"

USR=${apuser:-www-data}
PROCS=${binname:-apache2}


if [ "$1" = "autoconf" ]; then
    echo yes
    exit 0
fi

if [ "$1" = "config" ]; then

    echo 'graph_title Average size of apache child processes'
    echo 'graph_args --base 1024 -l 0 '
    echo 'graph_vlabel Bytes'
    echo 'graph_scale no'
    echo 'graph_category webserver'
    echo 'graph_info Indicate the memdium size of all the apache child process.'

    echo "servers.label servers"
    echo "servers.type GAUGE"
    echo "servers.min 0"

    exit 0
fi

matched_processes=$(ps auxf | grep -- "$PROCS" | grep "^$USR" | grep -v grep)
if [ -n "$matched_processes" ]; then
    average_memory=$(printf '%s' "$matched_processes" | awk '{count+=1; sum+=$6} END {print sum / count * 1024}')
else
    average_memory="U"
fi

echo "servers.value $average_memory"