Shell Programming and Scripting

#!/bin/bash
#
#print out wvlm from given time and site

site=$1
rnge=$2
daysback=$3
EsecStt=$[`date -u +%s` - (3600*24*$daysback)]
EsecStp=$[`date -u +%s`]
outputfile="/Volumes/Extras/RealTime/Plots/Waves/`echo $site`/wvlm_rng$rnge.ps"
cat `find /Volumes/Extras/RealTime/Data/Waves -type f -iname "wvlm_$site*"` | gawk -f /Users/dpath2o/cocmp/progs/trunk/dpath2o/awk/tmp.awk range=$rnge startT=$EsecStt stopT=$EsecStp
gnuplot <<EOF
set terminal postscript eps enhanced color 
set size 2,2
set xdata time
set timefmt "%s"
#set xrange [$EsecStt:$EsecStp]
set output "$outputfile"
set yrange [0:20]
set timestamp "Last updated: %d/%m/%Y, %H:%M" top
set xlabel "Date (mm/dd)" font "Helvetica,20" tc lt 4
set format x "%m/%d" 
set ylabel "meters" font "Helvetica,20" tc lt 4
set title "Wave Heights from $site and range $rnge" font "Helvetica,30" tc lt 1
plot "/Volumes/Extras/RealTime/Data/Waves/tmpWVLM" using 1:2 notitle with impulses
EOF

#!/opt/bin/local/gawk
{
  stt = sprintf("%04d %02d %02d %02d 00 00",$9,$10,$11,$12)
    testtime = mktime(stt)
    if ((testtime > startT ) && (testtime < stopT) && ($2 <= 20) && ($8 == range)) {
      printf("%i %f\n",testtime,$2) > "/Volumes/Extras/RealTime/Data/Waves/.tmpwvlm"
    }
}