#!/bin/sh

set -- ${SSH_ORIGINAL_COMMAND}
if [ "$1" != rsync ] && [ "$1" != /usr/bin/rsync ]; then
    echo 'Only rsync is allowed' >&2
    exit 2
fi
if [ "$2" != --server ]; then
    echo 'rsync must be run in server mode' >&2
    exit 2
fi

eval exec "${SSH_ORIGINAL_COMMAND}"