#!/bin/rc

if(~ $#* 0 1){
       what=$1
       if(~ $#what 0)
               what=`{cat}
       files=()
       for(f in *){
               if(file -m $"f | grep -s text/ )
                       files=($files $"f)
       }

       if(! ~ $#files 0)
               grep -n -- $what $files /dev/null
}
if not grep -n $* /dev/null