Re: sed or awk under XP in batch file (DOS box) - print $1 lines then delete $1 lines from a file

[Bob Proulx]

John Bartley K7AAY wrote:
> I need to print $1 lines from a file, and then delete that number of
> lines.
> $1 has been derived in the prior line with
> wc -l sourcefile.txt | awk '{$1 /= 4 ; $1 = int($1) ; print $1 }'

That all looks okay.  But I would probably personally do it all in the
shell.  Try this:

  echo $(( $(wc -l < sourcefile.txt) / 4 ))

> I've tried numerous awk and sed statements, a la:
> 
> sed -e -n "$1,p" sourcefile.txt > list.1
> sed -i "$1d" sourcefile.txt
> sed $1q list.txt > list.1 & sed -i $1d sourcefile.txt
> awk "{(FNR < $1); print}" sourcefile.txt > list.1

Try this:

  l=$(( $(wc -l < sourcefile.txt) / 4 ))
  sed --in-place "1,${l}d" sourcefile.txt

Bob