#!/bin/sh

FILE="/var/lib/collectd/users.rrd"
HOST=""

if [ -n "$SERVER_NAME" ]; then
    HOST=$SERVER_NAME
    echo "Content-Type: image/png";
    echo "";
else
    HOST=`hostname -f`
fi

rrdtool graph - -a PNG -t "$HOST users" -v "Users" \
    -c "BACK#000000" \
    -c "SHADEA#000000" \
    -c "SHADEB#000000" \
    -c "FONT#dddddd" \
    -c "CANVAS#202020" \
    -c "GRID#666666" \
    -c "MGRID#aaaaaa" \
    -c "FRAME#202020" \
    -c "ARROW#ffffff" \
    "DEF:users_avg=$FILE:users:AVERAGE" \
    "DEF:users_min=$FILE:users:MIN" \
    "DEF:users_max=$FILE:users:MAX" \
    "AREA:users_max#804040" \
    "AREA:users_min#202020" \
    "LINE1:users_avg#ff0000:Users" \
    "GPRINT:users_min:MIN:%4.1lf Min," \
    "GPRINT:users_avg:AVERAGE:%4.1lf Average," \
    "GPRINT:users_max:MAX:%4.1lf Max," \
    "GPRINT:users_avg:LAST:%4.1lf Last\l"