HT5639 How to stop a Terminal process when a file becomes to large?

Question

I was making a terminal program to produce a txt file with incrementing numbers every line. But do to time and size I had wished the program to stop when it produced a txt file larger than 1GB here is the code I was using.
#!/bin/bash
main()
    cd ~/desktop
    a=0
    b=1
    a=`expr $a + 1`
    echo $a
    echo $a >> count.txt
    run
count()
    b= du -skL count.txt  > /dev/null       ///// problem here //// run it with out the comment to see how
    a=`expr $a + 1`
    clear
    echo "#"$a "-" $b"KB"
    echo $a >> count.txt
run()
    cd ~/desktop
    while [ $b -lt 1048576 ]
    do
        count
    done
main

Answer 1

There is no need to post the same question more than once.
https://discussions.apple.com/thread/5209171?tstart=0
You could try posting in the developer forum https://discussions.apple.com/community/developer_forums