If the coerced argument is a physical pathname, it is returned. If the result is a logical pathname, this process is repeated. When the result is finally a physical pathname, it is returned. If no translation matches a logical pathname, an error of type file-error is signaled. Any such additional translations are implementation-defined.
Some implementations do no additional translations.
Any additional elements are implementation-defined. A from-wildname is a logical pathname whose host is the specified host . A to-wildname is any pathname. Translations are searched in the order listed, so more specific from-wildnames must precede more general ones. Logical pathname host names are compared with string-equal .