#! /bin/sh
#----------------------------------------------------------------------------
# system-devices-lv-resize - resize logical volumes
#
# Copyright (c) 2008 The Eisfair Team
#
# Creation   : 02.09.2009 schlotze
# 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.
#----------------------------------------------------------------------------
. /var/install/include/eislib
echo

#exec 2> /tmp/system-devices-lv-resize-trace$$.log
#set -x

modprobe dm_mod

mecho -info "Resize volume groups"
mecho

mecho
mecho -info "Available logical volumes"
mecho
techo begin 4 27 32 8 9r
techo row -info No. -info "LV" -info "VG" -info "Attr" -info "VSize"
mecho -info "================================================================================"

idx=1
lvs > /tmp/tmp_lvs$$
while read line
do
    set -- $line
    if [ "$1" != "LV" ]
    then
        eval lv_$idx='"$1"'
        eval vg_$idx='"$2"'
        techo row $idx $1 $2 $3 $4
        idx=`expr $idx + 1`
    fi
done < /tmp/tmp_lvs$$

rm /tmp/tmp_lvs$$

mecho
idx=`expr $idx - 1`
nolvdevice=`/var/install/bin/ask "Please choose a volume which you want to resize" "" "1-$idx" "0=Exit"`
if [ "$nolvdevice" != "0" ]
then 
    eval "lvdevice"='$lv_'$nolvdevice
    eval "vgdevice"='$vg_'$nolvdevice
    
    # check if lv is mounted
    if mount | grep -q "/dev/${vgdevice}/${lvdevice}"
    then 
        mecho -error "You cannot resize a mounted logical volume!"
        exit 1
    else
        if mount | grep -q "/dev/mapper/${vgdevice}-${lvdevice}"
        then 
            mecho -error "You cannot resize a mounted logical volume!"
            exit 1
        fi
    fi
    
    
    extend=`/var/install/bin/ask "Do you want to expand the logical volume?" "no"`
    mecho
    if [ "$extend" = "no" ]
    then
        reduce=`/var/install/bin/ask "Do you want to reduce the logical volume?" "no"`
        if [ "$reduce" = "yes" ]
        then
            size=`/var/install/bin/ask "Please enter the size you want to reduce the logical volume in megabyte (e.g. 100)" "" "1-999999" "0=Exit"`
            if [ "$size" != "0" ]
            then 
                lvreduce -L-$size /dev/$vgdevice/$lvdevice
            fi
        fi
    else
        size=`/var/install/bin/ask "Please enter the size you want to expand the logical volume in megabyte (e.g. 100)" "" "1-999999" "0=Exit"`
        if [ "$size" != "0" ]
        then 
            lvextend -L+$size /dev/$vgdevice/$lvdevice
        fi
    fi
    
    #umount
    #e2fsck -f /dev/$vgdevice/$lvdevice
    #resize2fs /dev/$vgdevice/$lvdevice
    mecho -warn "You have to check and resize the filesystem manually!"
    mecho "You can do this by running:"
    mecho "e2fsck -f /dev/$vgdevice/$lvdevice"
    mecho "resize2fs /dev/$vgdevice/$lvdevice"
fi

echo
anykey
exit 0