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<!-- Common Lisp HyperSpec (TM), version 7.0 generated by Kent M. Pitman on Mon, 11-Apr-2005 2:31am EDT -->
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<TITLE>CLHS: Function PATHNAME</TITLE>
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<HR>
<A NAME="pathname"><I>Function</I> <B>PATHNAME</B></A> <P>
<P><B>Syntax:</B><P>
<P>
<B>pathname</B> <I>pathspec</I> =&gt; <I>pathname</I><P>
<P>
<P><B>Arguments and Values:</B><P>
<P>
<I>pathspec</I>---a <A REL=DEFINITION HREF="26_glo_p.htm#pathname_designator"><I>pathname designator</I></A>. <P>
<I>pathname</I>---a <A REL=DEFINITION HREF="26_glo_p.htm#pathname"><I>pathname</I></A>. <P>
<P><B>Description:</B><P>
<P>
Returns the <A REL=DEFINITION HREF="26_glo_p.htm#pathname"><I>pathname</I></A> denoted by <I>pathspec</I>. <P>
If the <I>pathspec</I> <A REL=DEFINITION HREF="26_glo_d.htm#designator"><I>designator</I></A> is a <A REL=DEFINITION HREF="26_glo_s.htm#stream"><I>stream</I></A>, the <A REL=DEFINITION HREF="26_glo_s.htm#stream"><I>stream</I></A> can be either open or closed; in both cases, the <A REL=DEFINITION HREF="#pathname"><B>pathname</B></A> returned corresponds to the <A REL=DEFINITION HREF="26_glo_f.htm#filename"><I>filename</I></A> used to open the <A REL=DEFINITION HREF="26_glo_f.htm#file"><I>file</I></A>. <A REL=DEFINITION HREF="#pathname"><B>pathname</B></A> returns the same <A REL=DEFINITION HREF="26_glo_p.htm#pathname"><I>pathname</I></A> for a <A REL=DEFINITION HREF="26_glo_f.htm#file_stream"><I>file stream</I></A> after it is closed as it did when it was open. <P>
If the <I>pathspec</I> <A REL=DEFINITION HREF="26_glo_d.htm#designator"><I>designator</I></A> is a <A REL=DEFINITION HREF="26_glo_f.htm#file_stream"><I>file stream</I></A> created by opening a <A REL=DEFINITION HREF="26_glo_l.htm#logical_pathname"><I>logical pathname</I></A>, a <A REL=DEFINITION HREF="26_glo_l.htm#logical_pathname"><I>logical pathname</I></A> is returned. <P>
<P><B>Examples:</B><P>
<P>
<PRE>
;; There is a great degree of variability permitted here. The next
;; several examples are intended to illustrate just a few of the many
;; possibilities. Whether the name is canonicalized to a particular
;; case (either upper or lower) depends on both the file system and the
;; implementation since two different implementations using the same
;; file system might differ on many issues. How information is stored
;; internally (and possibly presented in #S notation) might vary,
;; possibly requiring `accessors' such as PATHNAME-NAME to perform case
;; conversion upon access. The format of a namestring is dependent both
;; on the file system and the implementation since, for example, one
;; implementation might include the host name in a namestring, and
;; another might not. #S notation would generally only be used in a
;; situation where no appropriate namestring could be constructed for use
;; with #P.
(setq p1 (pathname &quot;test&quot;))
=&gt; #P&quot;CHOCOLATE:TEST&quot; ; with case canonicalization (e.g., VMS)
OR=&gt; #P&quot;VANILLA:test&quot; ; without case canonicalization (e.g., Unix)
OR=&gt; #P&quot;test&quot;
OR=&gt; #S(PATHNAME :HOST &quot;STRAWBERRY&quot; :NAME &quot;TEST&quot;)
OR=&gt; #S(PATHNAME :HOST &quot;BELGIAN-CHOCOLATE&quot; :NAME &quot;test&quot;)
(setq p2 (pathname &quot;test&quot;))
=&gt; #P&quot;CHOCOLATE:TEST&quot;
OR=&gt; #P&quot;VANILLA:test&quot;
OR=&gt; #P&quot;test&quot;
OR=&gt; #S(PATHNAME :HOST &quot;STRAWBERRY&quot; :NAME &quot;TEST&quot;)
OR=&gt; #S(PATHNAME :HOST &quot;BELGIAN-CHOCOLATE&quot; :NAME &quot;test&quot;)
(pathnamep p1) =&gt; <A REL=DEFINITION HREF="26_glo_t.htm#true">true</A>
(eq p1 (pathname p1)) =&gt; <A REL=DEFINITION HREF="26_glo_t.htm#true">true</A>
(eq p1 p2)
=&gt; <A REL=DEFINITION HREF="26_glo_t.htm#true">true</A>
OR=&gt; <A REL=DEFINITION HREF="26_glo_f.htm#false">false</A>
(with-open-file (stream &quot;test&quot; :direction :output)
(pathname stream))
=&gt; #P&quot;ORANGE-CHOCOLATE:&gt;Gus&gt;test.lisp.newest&quot;
</PRE>
</TT> <P>
<P><B>Affected By:</B> None.
<P>
<P><B>Exceptional Situations:</B> None.
<P>
<P><B>See Also:</B><P>
<P>
<A REL=DEFINITION HREF="t_pn.htm#pathname"><B>pathname</B></A>, <A REL=DEFINITION HREF="t_logica.htm#logical-pathname"><B>logical-pathname</B></A>, <A REL=CHILD HREF="20_a.htm">Section 20.1 (File System Concepts)</A>, <A REL=CHILD HREF="19_ab.htm">Section 19.1.2 (Pathnames as Filenames)</A> <P>
<P><B>Notes:</B> None.
<P>
<P><HR>The following <A REL=META HREF="../Front/X3J13Iss.htm">X3J13 cleanup issues</A>, <I>not part of the specification</I>, apply to this section:<P><UL><LI> <A REL=CHILD HREF="../Issues/iss157.htm">FILE-OPEN-ERROR:SIGNAL-FILE-ERROR</A><LI> <A REL=CHILD HREF="../Issues/iss259.htm">PATHNAME-LOGICAL:ADD</A><LI> <A REL=CHILD HREF="../Issues/iss053.htm">CLOSED-STREAM-OPERATIONS:ALLOW-INQUIRY</A><LI> <A REL=CHILD HREF="../Issues/iss261.htm">PATHNAME-STREAM</A><P></UL><HR>
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