Mini Shell

#!/usr/bin/sh
# -*- tcl -*-
# The next line is executed by /bin/sh, but not tcl \
exec tclsh "$0" ${1+"$@"}

package require Expect

# read a complete line from stdin
# aborting after the number of seconds (given as an argument)
# - Don Libes
set timeout $argv
expect -re \n {send_user $expect_out(buffer)}