#!/bin/sh

# Demonstrate reading passwords in a shell script
# while not echoing those passwords to the screen.

# License: LGPLv2

# Note `read -s` in bash 3 at least does not echo
# the return/newline either? Therefore we need to
# `echo >&2` after each read to simulate that.

proc getpassword
{
    while not test $password = $rpassword -a -n $password {
        read -s -p "Enter a password for user '$1' : " password; echo > !2
        read -s -p "Reenter password for user '$1' : " rpassword; echo > !2
    }
    echo $password
}

setglobal pw = $[getpassword $(1:-blah)]

echo "password is '$pw'"