#!/bin/sh
#
# $Id: range,v 1.2 2006/04/25 23:09:14 vogelke Exp $
#
# print range of lines from a file or stdin.
# usage: range start end [file]

PATH=/bin:/usr/sbin
export PATH
tag=`basename $0`

die () {
    echo "$*" >& 2
    exit 1
}

# Arguments

case "$#" in
    0|1)  die "usage: $tag start end [file]" ;;
    *)    start=$1; end=$2; shift; shift ;;
esac

test "$start" -le "$end" ||
    die "usage: $tag: start line must be <= end line"

# Build and execute sed command

case "$#" in
    0)  sed -n -e "${start},${end}p" ;;

    *)  for file in $*; do
            sed -n -e "${start},${end}p" $file
        done
        ;;
esac

exit 0