142 lines
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142 lines
9.4 KiB
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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-HOST, PATHNAME-DEVICE...</TITLE>
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<H1><A REV=MADE HREF="http://www.lispworks.com/"><IMG WIDTH=80 HEIGHT=65 ALT="[LISPWORKS]" SRC="../Graphics/LWSmall.gif" ALIGN=Bottom></A><A REL=TOP HREF="../Front/index.htm"><IMG WIDTH=237 HEIGHT=65 ALT="[Common Lisp HyperSpec (TM)]" SRC="../Graphics/CLHS_Sm.gif" ALIGN=Bottom></A> <A REL=PREV HREF="f_pnp.htm"><IMG WIDTH=40 HEIGHT=40 ALT="[Previous]" SRC="../Graphics/Prev.gif" ALIGN=Bottom></A><A REL=UP HREF="c_filena.htm"><IMG WIDTH=40 HEIGHT=40 ALT="[Up]" SRC="../Graphics/Up.gif" ALIGN=Bottom></A><A REL=NEXT HREF="f_ld_log.htm"><IMG WIDTH=40 HEIGHT=40 ALT="[Next]" SRC="../Graphics/Next.gif" ALIGN=Bottom></A></H1>
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<A NAME="pathname-host"><A NAME="pathname-device"><A NAME="pathname-directory"><A NAME="pathname-name"><A NAME="pathname-type"><A NAME="pathname-version"><I>Function</I> <B>PATHNAME-HOST, PATHNAME-DEVICE, PATHNAME-DIRECTORY, PATHNAME-NAME, PATHNAME-TYPE, PATHNAME-VERSION</B></A></A></A></A></A></A> <P>
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<P><B>Syntax:</B><P>
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<P>
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<P>
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<B>pathname-host</B> <I>pathname <TT>&key</TT> case</I> => <I>host</I><P>
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<P>
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<B>pathname-device</B> <I>pathname <TT>&key</TT> case</I> => <I>device</I><P>
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<P>
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<B>pathname-directory</B> <I>pathname <TT>&key</TT> case</I> => <I>directory</I><P>
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<P>
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<B>pathname-name</B> <I>pathname <TT>&key</TT> case</I> => <I>name</I><P>
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<P>
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<B>pathname-type</B> <I>pathname <TT>&key</TT> case</I> => <I>type</I><P>
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<P>
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<P>
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<B>pathname-version</B> <I>pathname</I> => <I>version</I><P>
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<P>
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<P><B>Arguments and Values:</B><P>
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<P>
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<I>pathname</I>---a <A REL=DEFINITION HREF="26_glo_p.htm#pathname_designator"><I>pathname designator</I></A>. <P>
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<I>case</I>---one of <TT>:local</TT> or <TT>:common</TT>. The default is <TT>:local</TT>. <P>
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<I>host</I>---a <A REL=DEFINITION HREF="26_glo_v.htm#valid_pathname_host"><I>valid pathname host</I></A>. <P>
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<I>device</I>---a <A REL=DEFINITION HREF="26_glo_v.htm#valid_pathname_device"><I>valid pathname device</I></A>. <P>
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<I>directory</I>---a <A REL=DEFINITION HREF="26_glo_v.htm#valid_pathname_directory"><I>valid pathname directory</I></A>. <P>
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<I>name</I>---a <A REL=DEFINITION HREF="26_glo_v.htm#valid_pathname_name"><I>valid pathname name</I></A>. <P>
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<I>type</I>---a <A REL=DEFINITION HREF="26_glo_v.htm#valid_pathname_type"><I>valid pathname type</I></A>. <P>
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<I>version</I>---a <A REL=DEFINITION HREF="26_glo_v.htm#valid_pathname_version"><I>valid pathname version</I></A>. <P>
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<P>
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<P><B>Description:</B><P>
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<P>
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These functions return the components of <I>pathname</I>. <P>
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If the <I>pathname</I> <A REL=DEFINITION HREF="26_glo_d.htm#designator"><I>designator</I></A> is a <A REL=DEFINITION HREF="26_glo_p.htm#pathname"><I>pathname</I></A>, it represents the name used to open the file. This may be, but is not required to be, the actual name of the file. <P>
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If <I>case</I> is supplied, it is treated as described in <A REL=CHILD HREF="19_bbab.htm">Section 19.2.2.1.2 (Case in Pathname Components)</A>. <P>
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<P><B>Examples:</B><P>
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<P>
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<PRE>
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(setq q (make-pathname :host "KATHY"
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:directory "CHAPMAN"
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:name "LOGIN" :type "COM"))
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=> #P"KATHY::[CHAPMAN]LOGIN.COM"
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(pathname-host q) => "KATHY"
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(pathname-name q) => "LOGIN"
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(pathname-type q) => "COM"
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;; Because namestrings are used, the results shown in the remaining
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;; examples are not necessarily the only possible results. Mappings
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;; from namestring representation to pathname representation are
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;; dependent both on the file system involved and on the implementation
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;; (since there may be several implementations which can manipulate the
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;; the same file system, and those implementations are not constrained
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;; to agree on all details). Consult the documentation for each
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;; implementation for specific information on how namestrings are treated
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;; that implementation.
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;; VMS
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(pathname-directory (parse-namestring "[FOO.*.BAR]BAZ.LSP"))
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=> (:ABSOLUTE "FOO" "BAR")
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(pathname-directory (parse-namestring "[FOO.*.BAR]BAZ.LSP") :case :common)
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=> (:ABSOLUTE "FOO" "BAR")
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;; Unix
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(pathname-directory "foo.l") => NIL
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(pathname-device "foo.l") => :UNSPECIFIC
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(pathname-name "foo.l") => "foo"
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(pathname-name "foo.l" :case :local) => "foo"
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(pathname-name "foo.l" :case :common) => "FOO"
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(pathname-type "foo.l") => "l"
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(pathname-type "foo.l" :case :local) => "l"
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(pathname-type "foo.l" :case :common) => "L"
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(pathname-type "foo") => :UNSPECIFIC
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(pathname-type "foo" :case :common) => :UNSPECIFIC
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(pathname-type "foo.") => ""
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(pathname-type "foo." :case :common) => ""
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(pathname-directory (parse-namestring "/foo/bar/baz.lisp") :case :local)
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=> (:ABSOLUTE "foo" "bar")
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(pathname-directory (parse-namestring "/foo/bar/baz.lisp") :case :local)
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=> (:ABSOLUTE "FOO" "BAR")
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(pathname-directory (parse-namestring "../baz.lisp"))
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=> (:RELATIVE :UP)
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(PATHNAME-DIRECTORY (PARSE-NAMESTRING "/foo/BAR/../Mum/baz"))
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=> (:ABSOLUTE "foo" "BAR" :UP "Mum")
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(PATHNAME-DIRECTORY (PARSE-NAMESTRING "/foo/BAR/../Mum/baz") :case :common)
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=> (:ABSOLUTE "FOO" "bar" :UP "Mum")
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(PATHNAME-DIRECTORY (PARSE-NAMESTRING "/foo/*/bar/baz.l"))
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=> (:ABSOLUTE "foo" :WILD "bar")
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(PATHNAME-DIRECTORY (PARSE-NAMESTRING "/foo/*/bar/baz.l") :case :common)
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=> (:ABSOLUTE "FOO" :WILD "BAR")
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;; Symbolics LMFS
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(pathname-directory (parse-namestring ">foo>**>bar>baz.lisp"))
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=> (:ABSOLUTE "foo" :WILD-INFERIORS "bar")
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(pathname-directory (parse-namestring ">foo>*>bar>baz.lisp"))
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=> (:ABSOLUTE "foo" :WILD "bar")
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(pathname-directory (parse-namestring ">foo>*>bar>baz.lisp") :case :common)
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=> (:ABSOLUTE "FOO" :WILD "BAR")
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(pathname-device (parse-namestring ">foo>baz.lisp")) => :UNSPECIFIC
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</PRE>
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</TT> <P>
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<P><B>Affected By:</B><P>
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<P>
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The <A REL=DEFINITION HREF="26_glo_i.htm#implementation"><I>implementation</I></A> and the host <A REL=DEFINITION HREF="26_glo_f.htm#file_system"><I>file system</I></A>. <P>
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<P><B>Exceptional Situations:</B><P>
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<P>
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Should signal an error of <A REL=DEFINITION HREF="26_glo_t.htm#type"><I>type</I></A> <A REL=DEFINITION HREF="e_tp_err.htm#type-error"><B>type-error</B></A> if its first argument is not a <A REL=DEFINITION HREF="26_glo_p.htm#pathname"><I>pathname</I></A>. <P>
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<P><B>See Also:</B><P>
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<P>
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<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>
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<P><B>Notes:</B> None.
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<P>
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<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/iss267.htm">PATHNAME-WILD:NEW-FUNCTIONS</A><LI> <A REL=CHILD HREF="../Issues/iss263.htm">PATHNAME-SUBDIRECTORY-LIST:NEW-REPRESENTATION</A><LI> <A REL=CHILD HREF="../Issues/iss266.htm">PATHNAME-UNSPECIFIC-COMPONENT:NEW-TOKEN</A><LI> <A REL=CHILD HREF="../Issues/iss261.htm">PATHNAME-STREAM</A><LI> <A REL=CHILD HREF="../Issues/iss256.htm">PATHNAME-COMPONENT-CASE:KEYWORD-ARGUMENT</A><P></UL><HR>
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<A REL=COPYRIGHT HREF="../Front/Help.htm#Legal"><I>Copyright 1996-2005, LispWorks Ltd. All rights reserved.</I></A><P>
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