file-write-date [Function]

file-write-date pathspec => date

Arguments and Values::

pathspec---a pathname designator.

date---a universal time or nil.

Description::

Returns a universal time representing the time at which the file specified by pathspec was last written (or created), or returns nil if such a time cannot be determined.

Examples::

 (with-open-file (s "noel.text" 
                    :direction :output :if-exists :error)
   (format s "~&Dear Santa,~2
                Please leave lots of toys.~2
             ~2
   (truename s))
=>  #P"CUPID:/susan/noel.text"
 (with-open-file (s "noel.text")
   (file-write-date s))
=>  2902600800

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::

section Universal Time,

section Pathnames as Filenames

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