#!/bin/sh
# ctdb event script for checking local file system utilization

[ -n "$CTDB_BASE" ] || \
    export CTDB_BASE=$(cd -P $(dirname "$0") ; dirname "$PWD")

. $CTDB_BASE/functions
loadconfig

monitor_filesystem_usage ()
{
    # Check each specified filesystem, specified in format
    # <fs_mount>:<fs_threshold>, where <fs_threshold> is a
    # percentage.
    for _fs in $CTDB_CHECK_FS_USE ; do
        _fs_mount="${_fs%:*}"
        _fs_threshold="${_fs#*:}"

        if [ ! -d "$_fs_mount" ]; then
            die "Directory ${_fs_mount} does not exist"
        fi

	case "$_fs_threshold" in
	    [0-9]|[0-9][0-9]|100) : ;;
	    *) die "Threshold ${_fs_threshold} is invalid number"
	esac

        # Get current utilization
        _fs_usage=$(df -kP "$_fs_mount" | \
			   sed -n -e 's@.*[[:space:]]\([[:digit:]]*\)%.*@\1@p')
        if [ -z "$_fs_usage" ] ; then
            die "Unable to get FS utilization for ${_fs_mount}"
        fi

        if [ "$_fs_usage" -ge "$_fs_threshold" ] ; then
            die "ERROR: Utilization of ${_fs_mount} ${_fs_usage}% >= threshold ${_fs_threshold}%"
        fi
    done
}


case "$1" in
    monitor)
	monitor_filesystem_usage
	;;

    *)
	ctdb_standard_event_handler "$@"
	;;
esac

exit 0