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#!/bin/bash

if [ $# -lt 4 ]
then
    echo "Usage: `basename $0` <target name> <time interval> <file suffix> <graph comment> [graph width]"
    exit 1;
fi

name=$1
timediff=$2
suffix=$3
popis=$4

if [ $# -ge 5 ]
then
    width=$5
else
    width=400
fi

PATH=$PATH:/opt/rrdtool/bin

datadir="/var/statistiky/ping"
target_img_dir="/var/www/heaven/stat/img"

cd $datadir

now=`date +%s`

if [ $timediff -ge 604800 ]
then
    xgridstr="--x-grid HOUR:12:DAY:1:DAY:1:86400:%d.%m."
else
    xgridstr=""
fi

function flow_graph()
{
    rrdtool graph ${target_img_dir}/ping_${name}_rtt_${suffix}.png --imgformat PNG --start `expr $now - ${timediff}` --end $now \
        DEF:rttmin=${name}.rrd:rttmin:MIN \
        DEF:rttmax=${name}.rrd:rttmax:MAX \
        DEF:rttavg=${name}.rrd:rttavg:AVERAGE \
        DEF:rttmdev=${name}.rrd:rttmdev:AVERAGE \
        CDEF:avg1=PREV\(rttavg\) \
        CDEF:avg2=PREV\(avg1\) \
        CDEF:min1=PREV\(rttmin\) \
        CDEF:min2=PREV\(min1\) \
        CDEF:max1=PREV\(rttmax\) \
        CDEF:max2=PREV\(max1\) \
        CDEF:mdev1=PREV\(rttmdev\) \
        CDEF:mdev2=PREV\(mdev1\) \
        CDEF:prumer_rttavg=rttavg,avg1,avg2,+,+,3,/ \
        CDEF:prumer_rttmdev=rttmdev,mdev1,mdev2,+,+,3,/ \
        CDEF:maxmin=rttmax,rttmin,- \
        AREA:rttmin#FFFFFF \
        STACK:maxmin#e0e0e0 \
        LINE1:rttmax#FFa1a1:"max" \
        LINE1:rttmin#a8a8FF:"min" \
        LINE2:prumer_rttavg#202020:"avg" \
        --vertical-label "Round Trip Time [ms]" \
        --height 200 \
        --width  ${width} \
        ${xgridstr} \
        --title "${name} ${popis}" \
        --lower-limit 0 \
        --upper-limit 1

    rrdtool graph ${target_img_dir}/ping_${name}_pktloss_${suffix}.png --imgformat PNG --start `expr $now - ${timediff}` --end $now \
        DEF:pl_avg=${name}.rrd:pktloss:AVERAGE \
        DEF:pl_min=${name}.rrd:pktloss:MIN \
        DEF:pl_max=${name}.rrd:pktloss:MAX \
        CDEF:avg1=PREV\(pl_avg\) \
        CDEF:avg2=PREV\(avg1\) \
        CDEF:min1=PREV\(pl_min\) \
        CDEF:min2=PREV\(min1\) \
        CDEF:max1=PREV\(pl_max\) \
        CDEF:max2=PREV\(max1\) \
        CDEF:prumer_pktloss=pl_avg,avg1,avg2,+,+,3,/ \
        CDEF:maxmin=pl_max,pl_min,- \
        HRULE:5#000000 \
        AREA:pl_min#FFFFFF \
        STACK:maxmin#e0e0e0 \
        LINE1:pl_max#FFa1a1:"max" \
        LINE1:pl_min#a8a8FF:"min" \
        LINE2:prumer_pktloss#202020:"avg" \
        --vertical-label "Packet loss [%]" \
        --height 200 \
        --width  ${width} \
        ${xgridstr} \
        --title "${name} ${popis}" \
        --lower-limit 0 \
        --upper-limit 5 
}
function flow_graph_7200()
{
    rrdtool graph ${target_img_dir}/ping_${name}_rtt_${suffix}.png --imgformat PNG --start `expr $now - ${timediff}` --end $now \
        DEF:rttavg=${name}.rrd:rttavg:AVERAGE \
        DEF:rttmdev=${name}.rrd:rttmdev:AVERAGE \
        CDEF:avg1=PREV\(rttavg\) \
        CDEF:avg2=PREV\(avg1\) \
        CDEF:min_agg=rttavg,avg1,avg2,MIN,MIN \
        CDEF:max_agg=rttavg,avg1,avg2,MAX,MAX \
        CDEF:mdev1=PREV\(rttmdev\) \
        CDEF:mdev2=PREV\(mdev1\) \
        CDEF:prumer_rttavg=rttavg,avg1,avg2,+,+,3,/ \
        CDEF:prumer_rttmdev=rttmdev,mdev1,mdev2,+,+,3,/ \
        CDEF:maxmin=max_agg,min_agg,- \
        AREA:min_agg#FFFFFF \
        STACK:maxmin#e0e0e0 \
        LINE1:max_agg#FFa1a1:"max" \
        LINE1:min_agg#a8a8FF:"min" \
        LINE2:prumer_rttavg#202020:"avg" \
        --vertical-label "Round Trip Time [ms]" \
        --height 200 \
        --width  ${width} \
        ${xgridstr} \
        --title "${name} ${popis}" \
        --lower-limit 0 \
        --upper-limit 1

    rrdtool graph ${target_img_dir}/ping_${name}_pktloss_${suffix}.png --imgformat PNG --start `expr $now - ${timediff}` --end $now \
        DEF:pl_avg=${name}.rrd:pktloss:AVERAGE \
        CDEF:avg1=PREV\(pl_avg\) \
        CDEF:avg2=PREV\(avg1\) \
        CDEF:min_agg=pl_avg,avg1,avg2,MIN,MIN \
        CDEF:max_agg=pl_avg,avg1,avg2,MAX,MAX \
        CDEF:prumer_pktloss=pl_avg,avg1,avg2,+,+,3,/ \
        CDEF:maxmin=max_agg,min_agg,- \
        HRULE:5#000000 \
        AREA:min_agg#FFFFFF \
        STACK:maxmin#e0e0e0 \
        LINE1:max_agg#FFa1a1:"max" \
        LINE1:min_agg#a8a8FF:"min" \
        LINE2:prumer_pktloss#202020:"avg" \
        --vertical-label "Packet loss [%]" \
        --height 200 \
        --width  ${width} \
        ${xgridstr} \
        --title "${name} ${popis}" \
        --lower-limit 0 \
        --upper-limit 5 
}

if [ $timediff -lt 86400 ]
then
    flow_graph_7200
else
    flow_graph
fi