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ANSI Common Lisp  20
Files 20.2 Dictionary of Files
| 20.2.1 directory |
Function |
- Syntax:
- directory pathspec &key
 pathnames
- Arguments and Values:
- pathspec - a pathname
designator, which may contain wild
components.
pathnames - a list
of physical pathnames.
- Description:
- Determines which, if any, files that are
present in the file system have names matching pathspec, and returns a fresh list
of pathnames corresponding to the truenames of those files.
An implementation may be extended to accept implementation-defined keyword
arguments to directory.
- Affected By:
- The host computer's file system.
- Exceptional Situations:
- If the attempt to obtain a directory listing is not successful, an error of type file-error is
signaled.
- See Also:
- pathname, logical-pathname,
ensure-directories-exist, Section 20.1 File System Concepts, Section 21.1.1.1.2 Open and Closed Streams, Section 19.1.2 Pathnames as Filenames
- Notes:
- If the pathspec is not wild, the
resulting list will contain either zero or one elements.
Common Lisp specifies
"&key" in the argument list to directory
even though no standardized keyword
arguments to directory are defined. ":allow-other-keys
t" may be used in conforming
programs in order to quietly ignore any additional keywords which are passed by
the program but not supported by the implementation.
- Allegro CL Implementation Details:
- See cl-directory and cl:ensure-directories-exist in implementation.htm for information on the
implementation in Allegro CL, particularly for information on handling of wildcards in the
argument pathname designator. Note
the links are to the documentation for the current Allegro CL
version. Replace /current/ in the URL with the Allegro CL version
number to see similar documentation is earlier releases.
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