ToC DocOverview CGDoc RelNotes Index PermutedIndex
Allegro CL

Home Previous Up Next Table of Contents Index


ANSI Common Lisp   20 Files   20.2 Dictionary of Files
20.2.2 probe-file Function
Syntax:
probe-file pathspec    truename
Arguments and Values:
pathspec - a pathname designator.

truename - a physical pathname or nil.

Description:
probe-file tests whether a file exists.

probe-file returns false if there is no file named pathspec, and otherwise returns the truename of pathspec.

If the pathspec designator is an open stream, then probe-file produces the truename of its associated file. If pathspec is a stream, whether open or closed, it is coerced to a pathname as if by the function pathname.

Affected By:
The host computer's file system.
Exceptional Situations:
An error of type file-error is signaled if pathspec is wild.

An error of type file-error is signaled if the file system cannot perform the requested operation.

See Also:
truename, open, ensure-directories-exist, pathname, logical-pathname, Section 20.1 File System Concepts, Section 21.1.1.1.2 Open and Closed Streams, Section 19.1.2 Pathnames as Filenames
Allegro CL Implementation Details:
See cl:probe-file implementation in implementation.html.

Home Previous Up Next Table of Contents Index


© Franz Inc. All Rights Reserved - File last updated 2022-07-25