Function resolve_path 

pub fn resolve_path<R: ReadBlock>(
    root_dir_ref: BlockRef,
    current_dir: &CStr,
    path: &CStr,
    block_reader: &mut R,
) -> Result<BlockRef, Error>

Resolve path into main block reference.

root_dir_ref refers to the root directory, current_dir is the current working directory path. Panics if current_dir is not absolute.