#----------------------------------------------------------------------------
# /var/install/include/check-eisfair-version - check installed version
#
# Creation   :  2007-12-18 hbfl
# Last Update:  $Id$
#
# Copyright (c) 2001-2009 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.
#----------------------------------------------------------------------------

#----------------------------------------------------------------------------
# check first if eislib is included
#----------------------------------------------------------------------------
. /var/install/include/eislib

#----------------------------------------------------------------------------
# select system version
#----------------------------------------------------------------------------

    # list systems to select
    systems="eisfair-1
             eisfair-2
             eisxen-1"

    etc_system_file=/etc/eisfair-system

check_system ()
{
    clrhome

    # display systems to select on tty
    mecho -info "Can't detect the system type,"
    mecho -info "please select one first."

    echo
    echo
    echo "${systems}" |
    awk '{ printf ("%6s.  %s\n", FNR, $1) }'
    echo
    echo
    /var/install/bin/ask "Select" "${system_to_work}" "1-$(echo "${systems}" | wc -l)" "^$=Return" "0=Exit" >/tmp/ask.$$
    rc=${?}

    system_to_work=`cat /tmp/ask.$$`
    rm -f /tmp/ask.$$

    if [ $rc = 255 ]
    then
        system_to_work=0
    fi

    case ${system_to_work} in
        '')
            exit 0
        ;;
        0)
            exit 127
        ;;
        *)
            # set working system
            system_work="`echo "$systems" | awk 'FNR == '$system_to_work' { print $1 }'`"
            # write ${etc_system_file}
            echo "${system_work}" >${etc_system_file}
            EISFAIR_SYSTEM=${system_work}

            # export EISFAIR_SYSTEM to check it once
            export EISFAIR_SYSTEM
        ;;
    esac
}

# check ${etc_system_file} exists
if [ ! -f ${etc_system_file} ]
then
    # if not exists
    check_system
else
    # if exists, read entry
    system_work="`awk '{ print $1 }' ${etc_system_file}`"

    # check if ${etc_system_file} entry broken
    if `echo "${systems}" | grep -q "${system_work}$"`
    then
        # if not broken
        EISFAIR_SYSTEM="${system_work}"

        # export EISFAIR_SYSTEM to check it once
        export EISFAIR_SYSTEM
    else
        # if broken
        check_system
    fi
fi
#----------------------------------------------------------------------------
# end
#----------------------------------------------------------------------------