#! /bin/sh
#----------------------------------------------------------------------------
# /var/install/bin/invalidate-password - invalidate password of a user
#
# Copyright (c) 2001-2005 The Eisfair Team, c/o Frank Meyer, frank(at)eisfair(dot)org
#
# Creation:	15.08.2003  fm
# Last Update:  $Id$
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#----------------------------------------------------------------------------

# include eislib
. /var/install/include/eislib

#----------------------------------------------------------------------------
# check if password is valid
# input : $1 - user name
# return:  0 - valid password
#          1 - invalid password
#----------------------------------------------------------------------------
function is_valid_pw ()
{
    u_name="$1"
    ret=1

    if [ "$1" != "" ]
    then
        pword=`grep "^$u_name:" /etc/shadow|cut -d: -f2`

        [ "$pword" != "*" ] && ! echo "$pword"|grep -q "^!"

        if [ $? -eq 0 ]
        then
            ret=0
        fi
    fi

    return $ret
}

#============================================================================
# main
#============================================================================

user=$1

if [ "$user" = "" ]
then
    clrhome
    mecho -info "Invalidate password"
    mecho
    mecho
    interactive=true

    /var/install/bin/ask "User:" '' '*' > /tmp/ask.$$
    rc=$?
    user=`cat /tmp/ask.$$`
    rm -f /tmp/ask.$$
    if [ $rc = 255 ]
    then
        exit 1
    fi

    mecho
else
    interactive=false
fi

if [ "$user" != "" ]
then
    if is_valid_pw "$user"
    then
        # lock password
        passwd -l "$user"
    fi
else
    mecho -warn "Command aborted"
fi

if [ $interactive = true ]
then
    mecho
    anykey
fi