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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 Extensions to cl:probe-file in implementation.htm. 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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