#### 20.2.2 probe-file [Function] ¶

`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 [Function] , open [Function] , ensure-directories-exist [Function] , pathname,

logical-pathname,

File System Concepts, File Operations on Open and Closed Streams,

Pathnames as Filenames