File::Spec->canonpath

Nothing to do; returns what it's given.

File::Spec->catdir(dir[, dir...])

Concatenates two or more directory names to form a complete path. Ends with a directory name and appends a trailing : if there isn't one. You can get a relative path by either beginning the first argument with : or putting "" as the first argument.

File::Spec->catfile(dir[, dir...], file)

Concatenates one or more directory names and a filename to form a complete path that ends with a filename. Uses catdir.

File::Spec->curdir

Returns string representing the current directory.

File::Spec->file_name_is_absolute(path)

Takes a path as argument and returns true if it is an absolute path.

File::Spec->path

Returns null list for MacPerl applications, or $ENV{Commands}, suitably split, for the MacPerl tool under MPW.

File::Spec->rootdir

Returns string representing the root directory. Under MacPerl, returns the name of the startup volume.

File::Spec->updir

Returns string representing the parent directory.