surf_action_t(*write) (void *workstation, const void* ptr, size_t size, size_t nmemb, surf_file_t stream);
surf_action_t(*stat) (void *workstation, surf_file_t stream);
surf_action_t(*unlink) (void *workstation, surf_file_t stream);
surf_action_t(*write) (void *workstation, const void* ptr, size_t size, size_t nmemb, surf_file_t stream);
surf_action_t(*stat) (void *workstation, surf_file_t stream);
surf_action_t(*unlink) (void *workstation, surf_file_t stream);