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35 lines
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<TITLE>CLHS: Section 20.1.3</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_ab.htm"><IMG WIDTH=40 HEIGHT=40 ALT="[Previous]" SRC="../Graphics/Prev.gif" ALIGN=Bottom></A><A REL=UP HREF="20_a.htm"><IMG WIDTH=40 HEIGHT=40 ALT="[Up]" SRC="../Graphics/Up.gif" ALIGN=Bottom></A><A REL=NEXT HREF="20_aca.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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20.1.3 Truenames</H2> <P>
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Many <A REL=DEFINITION HREF="26_glo_f.htm#file_system"><I>file systems</I></A> permit more than one <A REL=DEFINITION HREF="26_glo_f.htm#filename"><I>filename</I></A> to designate a particular <A REL=DEFINITION HREF="26_glo_f.htm#file"><I>file</I></A>. <P>
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Even where multiple names are possible, most <A REL=DEFINITION HREF="26_glo_f.htm#file_system"><I>file systems</I></A> have a convention for generating a canonical <A REL=DEFINITION HREF="26_glo_f.htm#filename"><I>filename</I></A> in such situations. Such a canonical <A REL=DEFINITION HREF="26_glo_f.htm#filename"><I>filename</I></A> (or the <A REL=DEFINITION HREF="26_glo_p.htm#pathname"><I>pathname</I></A> representing such a <A REL=DEFINITION HREF="26_glo_f.htm#filename"><I>filename</I></A>) is called a <A REL=DEFINITION HREF="26_glo_t.htm#truename"><I>truename</I></A>. <P>
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The <A REL=DEFINITION HREF="26_glo_t.htm#truename"><I>truename</I></A> of a <A REL=DEFINITION HREF="26_glo_f.htm#file"><I>file</I></A> may differ from other <A REL=DEFINITION HREF="26_glo_f.htm#filename"><I>filenames</I></A> for the file because of symbolic links, version numbers, logical device translations in the <A REL=DEFINITION HREF="26_glo_f.htm#file_system"><I>file system</I></A>, <A REL=DEFINITION HREF="26_glo_l.htm#logical_pathname"><I>logical pathname</I></A> translations within Common Lisp, or other artifacts of the <A REL=DEFINITION HREF="26_glo_f.htm#file_system"><I>file system</I></A>. <P>
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The <A REL=DEFINITION HREF="26_glo_t.htm#truename"><I>truename</I></A> for a <A REL=DEFINITION HREF="26_glo_f.htm#file"><I>file</I></A> is often, but not necessarily, unique for each <A REL=DEFINITION HREF="26_glo_f.htm#file"><I>file</I></A>. For instance, a Unix <A REL=DEFINITION HREF="26_glo_f.htm#file"><I>file</I></A> with multiple hard links could have several <A REL=DEFINITION HREF="26_glo_t.htm#truename"><I>truenames</I></A>. <P>
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<A REL=CHILD HREF="20_aca.htm"><H2>
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20.1.3.1 Examples of Truenames</H2></A><P><HR>
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