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47 lines
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<TITLE>CLHS: Section 20.1</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="20_.htm"><IMG WIDTH=40 HEIGHT=40 ALT="[Previous]" SRC="../Graphics/Prev.gif" ALIGN=Bottom></A><A REL=UP HREF="20_.htm"><IMG WIDTH=40 HEIGHT=40 ALT="[Up]" SRC="../Graphics/Up.gif" ALIGN=Bottom></A><A REL=NEXT HREF="20_aa.htm"><IMG WIDTH=40 HEIGHT=40 ALT="[Next]" SRC="../Graphics/Next.gif" ALIGN=Bottom></A></H1>
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<H2>
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20.1 File System Concepts</H2> <P>
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This section describes the Common Lisp interface to file systems. The model used by this interface assumes that <A REL=DEFINITION HREF="26_glo_f.htm#file"><I>files</I></A> are named by <A REL=DEFINITION HREF="26_glo_f.htm#filename"><I>filenames</I></A>, that a <A REL=DEFINITION HREF="26_glo_f.htm#filename"><I>filename</I></A> can be represented by a <A REL=DEFINITION HREF="26_glo_p.htm#pathname"><I>pathname</I></A> <A REL=DEFINITION HREF="26_glo_o.htm#object"><I>object</I></A>, and that given a <A REL=DEFINITION HREF="26_glo_p.htm#pathname"><I>pathname</I></A> a <A REL=DEFINITION HREF="26_glo_s.htm#stream"><I>stream</I></A> can be constructed that connects to a <A REL=DEFINITION HREF="26_glo_f.htm#file"><I>file</I></A> whose <A REL=DEFINITION HREF="26_glo_f.htm#filename"><I>filename</I></A> it represents. <P>
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For information about opening and closing <A REL=DEFINITION HREF="26_glo_f.htm#file"><I>files</I></A>, and manipulating their contents, see <A REL=CHILD HREF="21_.htm">Section 21 (Streams)</A>. <P>
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The next figure lists some <A REL=DEFINITION HREF="26_glo_o.htm#operator"><I>operators</I></A> that are applicable to <A REL=DEFINITION HREF="26_glo_f.htm#file"><I>files</I></A> and directories. <P>
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<PRE>
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<A REL=DEFINITION HREF="f_cmp_fi.htm#compile-file">compile-file</A> <A REL=DEFINITION HREF="f_file_l.htm#file-length">file-length</A> <A REL=DEFINITION HREF="f_open.htm#open">open</A>
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<A REL=DEFINITION HREF="f_del_fi.htm#delete-file">delete-file</A> <A REL=DEFINITION HREF="f_file_p.htm#file-position">file-position</A> <A REL=DEFINITION HREF="f_probe_.htm#probe-file">probe-file</A>
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<A REL=DEFINITION HREF="f_dir.htm#directory">directory</A> <A REL=DEFINITION HREF="f_file_w.htm#file-write-date">file-write-date</A> <A REL=DEFINITION HREF="f_rn_fil.htm#rename-file">rename-file</A>
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<A REL=DEFINITION HREF="f_file_a.htm#file-author">file-author</A> <A REL=DEFINITION HREF="f_load.htm#load">load</A> <A REL=DEFINITION HREF="m_w_open.htm#with-open-file">with-open-file</A>
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</PRE>
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<P><B>Figure 20-1. File and Directory Operations</B> <P>
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<A REL=CHILD HREF="20_aa.htm"><H2>
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20.1.1 Coercion of Streams to Pathnames</H2></A><P>
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<A REL=CHILD HREF="20_ab.htm"><H2>
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20.1.2 File Operations on Open and Closed Streams</H2></A><P>
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<A REL=CHILD HREF="20_ac.htm"><H2>
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20.1.3 Truenames</H2></A><P><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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