Question

I am looking for a command (or way of doing) the following:

echo -n 6 | doif -criteria "isgreaterthan 4" -command 'do some stuff'

The echo part would obviously come from a more complicated string of bash commands. Essentially I am taking a piece of text from each line of a file and if it appears in another set of files more than x (say 100) then it will be appended to another file.

Is there a way to perform such trickery with awk somehow? Or is there another command.. I’m hoping that there is some sort of xargs style command to do this in the sense that the -I% portion would be the value with which to check the criteria and whatever follows would be the command to execute.

Thanks for thy insight.

Answer 1

It’s possible, though I don’t see the reason why you would do that…

function doif
{
  read val1
  op=$1
  val2="$2"
  shift 2
  if [ $val1 $op "$val2" ]; then
    "$@"
  fi
}

echo -n 6 | doif -gt 3 ls /