#!/bin/bash
#
# /usr/bin/mailpasswd
#
#               Shell script wrapper for courierpasswd to change passwords
#               for courier-imapd via authdaemon.
#
#               Originally written for the Gentoo Linux distribution
#
# Copyright     (c) 1999-2005 Gentoo Technologies, Inc
#               Released under v2 of the GNU GPL
#
# Author(s)     Christoph Probst <chris-sw-ccp@netzpunkt.org>
#
# Notes         - to change passwords you need to emerge courierpasswd.
#               - If you don't want the password-change dialog then rather use
#                 checkpasswd directly.
#               - there is a plugin courierchang_pass available for squirrelmail
#                 that uses courierpasswd INSTEAD of courierpassd or poppassd.
#
# Todo          - convert this script to python
#
# Version       0.1
#
# ========================================================================

if [ "${1}x" == "x" ] ; then

  echo "mailpasswd - Interface to change the password for an e-mail user."
  echo "Syntax: mailpasswd e-mail-username"

  exit 2

fi

username=${1}
echo "Changing password for e-mail user ${username}"


echo -n "(current) E-Mail password: "
read -s oldpassword
echo 


echo -n "New E-Mail password: "
read -s newpassword
echo

if [ "${newpassword}x" == "x" ] ; then
  echo "New password is empty, that is not allowed! Password NOT changed."
  exit 3
fi


echo -n "Retype new E-Mail password: "
read -s newpassword2
echo

if [ "${newpassword}x" == "${newpassword2}x" ] ; then

  # don't use echo (see courierpasswd manpage)
  python -c "print \"%s\0%s\0%s\0\" % (\"${username}\",\"${oldpassword}\",\"${newpassword}\")" \
       | courierpasswd --changepwd --stdin
  errcode=$?

  if [ $errcode == 0 ] ; then
    echo "Password successfully changed for e-mail user ${username}."
    exit 0
  else
    echo "Wrong username or password. Password NOT changed."
    exit ${errcode}
  fi

else
  echo "New passwords don't match. Password NOT changed."
  exit 4
fi