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namestring, file-namestring, directory-namestring,

host-namestring, enough-namestring

[Function]

namestring pathname => namestring

file-namestring pathname => namestring

directory-namestring pathname => namestring

host-namestring pathname => namestring

enough-namestring pathname {&optional defaults} => namestring

Arguments and Values::

pathname---a pathname designator.

defaults---a pathname designator.

The default is the value of *default-pathname-defaults*.

namestring---a string or nil.

[Editorial Note by KMP: Under what circumstances can NIL be returned??]

Description::

These functions convert pathname into a namestring. The name represented by pathname is returned as a namestring in an implementation-dependent canonical form.

namestring returns the full form of pathname.

file-namestring returns just the name, type, and version components of pathname.

directory-namestring returns the directory name portion.

host-namestring returns the host name.

enough-namestring returns an abbreviated namestring that is just sufficient to identify the file named by pathname when considered relative to the defaults. It is required that

 (merge-pathnames (enough-namestring pathname defaults) defaults)
== (merge-pathnames (parse-namestring pathname nil defaults) defaults)

in all cases, and the result of enough-namestring is the shortest reasonable string that will satisfy this criterion.

It is not necessarily possible to construct a valid namestring by concatenating some of the three shorter namestrings in some order.

Examples::

 (namestring "getty")            
=>  "getty"
 (setq q (make-pathname :host "kathy" 
                         :directory 
                           (pathname-directory *default-pathname-defaults*)
                         :name "getty")) 
=>  #S(PATHNAME :HOST "kathy" :DEVICE NIL :DIRECTORY directory-name 
       :NAME "getty" :TYPE NIL :VERSION NIL)
 (file-namestring q) =>  "getty"
 (directory-namestring q) =>  directory-name
 (host-namestring q) =>  "kathy" 
 ;;;Using Unix syntax and the wildcard conventions used by the
 ;;;particular version of Unix on which this example was created:
 (namestring
   (translate-pathname "/usr/dmr/hacks/frob.l"
                       "/usr/d*/hacks/*.l"
                       "/usr/d*/backup/hacks/backup-*.*"))
=>  "/usr/dmr/backup/hacks/backup-frob.l"
 (namestring
   (translate-pathname "/usr/dmr/hacks/frob.l"
                       "/usr/d*/hacks/fr*.l"
                       "/usr/d*/backup/hacks/backup-*.*"))
=>  "/usr/dmr/backup/hacks/backup-ob.l"

 ;;;This is similar to the above example but uses two different hosts,
 ;;;U: which is a Unix and V: which is a VMS.  Note the translation
 ;;;of file type and alphabetic case conventions.
 (namestring
   (translate-pathname "U:/usr/dmr/hacks/frob.l"
                       "U:/usr/d*/hacks/*.l"
                       "V:SYS$DISK:[D*.BACKUP.HACKS]BACKUP-*.*"))
=>  "V:SYS$DISK:[DMR.BACKUP.HACKS]BACKUP-FROB.LSP"
 (namestring
   (translate-pathname "U:/usr/dmr/hacks/frob.l"
                       "U:/usr/d*/hacks/fr*.l"
                       "V:SYS$DISK:[D*.BACKUP.HACKS]BACKUP-*.*"))
=>  "V:SYS$DISK:[DMR.BACKUP.HACKS]BACKUP-OB.LSP"

See Also::

section truename [Function] , section merge-pathnames [Function] , pathname, logical-pathname, section File System Concepts,

section Pathnames as Filenames


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