#! /bin/sh
#----------------------------------------------------------------------------
# /var/install/bin/invalidate-password - invalidate password of a user
#
# Creation:     2003-08-15  fm
# Last Update:  $Id$
#
# Copyright (c) 2001-@@YEAR@@ the eisfair team, team(at)eisfair(dot)org
#
# 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 : $1 - user name
# return:  0 - valid password
#          1 - invalid password
# ---------------------------------------------------------------------------
is_valid_pw ()
{
    u_name="${1}"
    ret=1

    if [ -n "${u_name}" ]
    then
        pword=$( awk -F: '/^'${u_name}':/ {print $2}' /etc/shadow )

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

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

    return ${ret}
}

# ---------------------------------------------------------------------------
# main
# ---------------------------------------------------------------------------

user=${1}

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

    _ask_tmpfile=$( mktemp -t XXXXXXXXXXXXX )
    /var/install/bin/ask "User:" '' '*' > ${_ask_tmpfile}
    rc=$?
    read user < ${_ask_tmpfile}
    rm -f  ${_ask_tmpfile}
    if [ ${rc} = 255 ]
    then
        exit 1
    fi

    mecho
fi

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

if "${interactive:-false}"
then
    mecho
    anykey
fi

# ---------------------------------------------------------------------------
# end
# ---------------------------------------------------------------------------