#!/bin/ksh

function tsrun
{
	typeset err out ret

	err=$(mktemp /tmp/XXXXXXXXXX)
	out=$(mktemp /tmp/XXXXXXXXXX)
	trap "rm $err $out" EXIT

	eval "$@" >$out 2>$err
	ret=$?
	sed 's/^/| /' $out
	sed 's/^/@ /' $err
	print '? '$ret
}

function tseval
{
	typeset ln

	while read ln
	do
		case ${ln%% *} in
		$)
			print "$ln"
			tsrun "${ln#$}"
			;;
		!(?|@|\|))
			print "$ln"
			;;
		esac
	done
}

(( $# == 0 )) && exit 64

if [[ $1 = -b ]]
then
	(( $# == 1 )) && exit 64
	shift
	for fn
	do
		cp $fn $fn~
		(rm $fn && tseval >$fn) <$fn
	done
else
	for fn
	do
		tseval <$fn | diff -u $fn -
	done
fi