This site is a static rendering of the Trac instance that was used by R7RS-WG1 for its work on R7RS-small (PDF), which was ratified in 2013. For more information, see Home. For a version of this page that may be more recent, see DirectoryPortsCowan in WG2's repo for R7RS-large.

Directory­Ports­Cowan

cowan
2011-11-02 05:23:43
7history
source

Directory ports

This proposal depends on SettingsListsCowan. See DirectoriesCowan for a proposal for creating and destroying directories.

Procedures

(open-directory filename)

Filename can be a string or a settings list as described in SettingsListsCowan. In addition to the keys path and encoding specified there, the key hidden can have the values none (don't expose hidden files), all (expose all files), and dots (expose all files except . and ..). On Posix systems, hidden files have names beginning with .; on Windows, hidden files are named ., .., or have the hidden file attribute.

The returned value is an input port, but it is neither a binary port nor a character port. The only standard procedure callable on it is read, which returns the next available filename as a string (or, when necessary, an implementation-dependent object). Filenames are returned in arbitrary order.

(directory-port? obj)

Returns #t if obj is a directory port. Directory ports are a disjoint type.