topoftop

#!/bin/bash

# Gets the heaviest job from top, if above certain threshold.

# Cpucsekk stuff first
if [ ! -d $HOME/.cpucsekk/ ]
then
 mkdir $HOME/.cpucsekk/
fi

# Edit this file for different CPU load threshold.
if [ ! -f $HOME/.cpucsekk/cpucsekk.txt ]
then
 echo "15" > $HOME/.cpucsekk/cpucsekk.txt
fi

# Don't display anything below this threshold:
cpupc=`cat $HOME/.cpucsekk/cpucsekk.txt`
re='^[0-9]+$'
if ! [[ $cpupc =~ $re ]] ; then
 echo "$HOME/.cpucsekk/cpucsekk.txt should contain a single percentage number." >&2; exit 1
fi

# Get top percentage and name of process
topoutp=`top -b -n1 |
awk '{
# We set the relevant column numbers further down. If they are set then print from the next line and exit.
 if (commcol>0){
  printf "%d ",$cpucol
  printf $commcol
  exit
 }
# Setting relevant column numbers here.
 for (i=1; i<=NF; i++){
  if ($i=="%CPU"){
   cpucol=i
  }
  if ($i=="COMMAND"){
   commcol=i
  }
 } 
}'`

topp=${topoutp% *}
topn=${topoutp#* }
## Test:
#echo "$topoutp"
#echo "topp: $topp"
#echo "$topn"
#echo "cpupc: $cpupc"

if [[ $topp -gt $cpupc ]]
then
 echo "$topn $topp%"
fi