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

20.2.6 file-write-date Function

Syntax:
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%I was good this year.  ~
                Please leave lots of toys.~2%Love, Sue~
             ~2%attachments: milk, cookies~%")
   (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 25.1.4.2 Universal Time, Section 19.1.2 Pathnames as Filenames

Allegro CL Implementation Details:
See cl:file-write-date in implementation.htm for information on the implementation of file-write-date. 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.

Home Previous Up Next Table of Contents Index
© Franz Inc. 1998-2017 - File last updated 01-11-2017