VERSION=0.2
HELP=0
LIST=0
TEST=0
VERBOSE=0
ZBACKUP=0
ZONES=""
BACKUPDIR=/var/tmp
FSSNAPDIR=/var/tmp
MOUNTDIR=/mnt

usage() {
  echo "Usage: zonebkp [OPTION]"
  echo "  [-h]               Prints this help text."
  echo "  -l                 Lists zones for backup."
  echo "  -t                 Tests only, without backup."
  echo "  -v                 Verbose mode."
  echo "  -b zonename[,zonename...]"
  echo "                     Backups specified zones."
  echo "  -d backupdir       Location of backup. Default is /var/tmp"
}

getoptions () {
  OPTS=$@
  OPTARGS=":hltvb:d:"
  getopts "$OPTARGS" OPT $OPTS
  if [ "$OPT" = "?" ]
  then 
    HELP=1
  fi
  while [ "$OPT" != "?" ]
  do 
    case "$OPT" in
      h)
        HELP=1
        ;;
      l)
        LIST=1
        ;;
      t)
        TEST=1
        ;;
      v)
        VERBOSE=1
        ;;
      b)
        ZBACKUP=1
        ZONES=`echo $OPTARG | tr ',' ' '`
        ;;
      d)
        BACKUPDIR=$OPTARG
        ;;
    esac
    getopts "$OPTARGS" OPT $OPTS
  done
}

zonebackup() {
  if [ "$1" = "" ]
  then
    echo "No zone specified."
    exit 1
  fi
  for Z in $1
  do
    [ "$VERBOSE" = 1 ] && echo "Prepare zone $Z for backup."
    # get the mountpoint where the zone is located
    ZONEDIR=`zoneadm list -ip | grep $Z | nawk -F: '{print $4}'`
    cd $ZONEDIR
    ZONEMOUNT=`df -k . | tail -1 | nawk '{print $6}`
    [ "$VERBOSE" = 1 ] && echo "Mountpoint of $Z is $ZONEMOUNT."
    FSTYPE=`df -n . | nawk '{print $3}'`
    if [ "$FSTYPE" != ufs ]
    then
      echo "FSType is not ufs!"
      exit 1
    fi
    [ "$VERBOSE" = 1 ] && echo "FSType is $FSTYPE"
    [ "$VERBOSE" = 1 ] && echo "Create fssnap for zone $Z."
    FSSNAPDEV=`fssnap -o bs=$FSSNAPDIR $ZONEMOUNT`
    SNAPSHOTFILE=snapshot`fssnap -i | nawk '{print $1}'`
    [ "$VERBOSE" = 1 ] && echo "Mount $FSSNAPDEV."
    mount -o ro $FSSNAPDEV $MOUNTDIR
    cd $MOUNTDIR${ZONEDIR#$ZONEMOUNT}
    if [ "$TEST" = 0 ]
    then 
      [ "$VERBOSE" = 1 ] && echo "Backup zone configuration." 
      zonecfg -z $Z export -f $BACKUPDIR/$Z.cfg
      [ "$VERBOSE" = 1 ] && echo "Backup zone $Z."
      tar cf - * | gzip > $BACKUPDIR/$Z.tar.gz
      [ "$VERBOSE" = 1 ] && echo "Backup done for $Z."
    else
      echo "No backup done ... only testing."
    fi
    cd /
    [ "$VERBOSE" = 1 ] && echo "Unmount $FSSNAPDEV."
    umount $FSSNAPDEV
    if [ "$?" -ne 0 ]
    then
      echo "Warning: Not able to unmount $FSSNAPDEV... force unmount!"
      umount -f $FSSNAPDEV
    fi
    fssnap -d $ZONEMOUNT
    [ "$VERBOSE" = 1 ] && echo "Delete snapshot file."
    rm $FSSNAPDIR/$SNAPSHOTFILE
  done
}