probe-file
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)
Expanded Reference: probe-file
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(probe-file )