#!/bin/bash
set -Ceuo pipefail
PATH=/bin:/usr/bin:/usr/local/bin:/sbin:/usr/sbin

cd /var/www/html/rrd

rrd=net.rrd
if ! test -f $rrd
then
  rrdcreate $rrd \
    DS:inb:DERIVE:600:U:U \
    RRA:AVERAGE:0.5:1:512 RRA:AVERAGE:0.5:12:512 RRA:AVERAGE:0.5:288:512 \
    DS:outb:DERIVE:600:U:U \
    RRA:AVERAGE:0.5:1:512 RRA:AVERAGE:0.5:12:512 RRA:AVERAGE:0.5:288:512
fi
set -- $(awk '(NR==4)' /proc/net/netstat)
inb=$8
outb=$9
rrdupdate $rrd N:${inb}:${outb}
logger -p news.info -t netrrd inb=${inb} outb=${outb}

rrdtool graph net.png \
  -t net \
  DEF:inb=${rrd}:inb:AVERAGE \
  DEF:outb=${rrd}:outb:AVERAGE \
  LINE1:inb#FF0000 \
  LINE1:outb#00FF00 \
  > /dev/null

rrdtool graph netd10.png \
  --end now --start now-864000s \
  -t net \
  DEF:inb=${rrd}:inb:AVERAGE \
  DEF:outb=${rrd}:outb:AVERAGE \
  LINE1:inb#FF0000 \
  LINE1:outb#00FF00 \
  > /dev/null