#!/bin/sh
a=0
while [ "$a" == 0 ]; do
    # sleep until the next 60 seconds are full
    perl -e 'sleep 60 - time % 60'

    # temperature=`curl -s http://www.rogerhenriksson.se/temp.php`
    temperature=`/opt/owfs/bin/owread /10.B1304D010800/temperature`

    # remove initial whitespace
    temperature=`expr "$temperature" : '[ ]*\(.*\)'`

    # I can use N as a replacement for the current time
    /opt/local/bin/rrdtool update /Library/WebServer/CGI-Executables/temp.rrd N:$temperature

    echo $temperature " "  `date`

done # end of while loop