67 lines
4.6 KiB
HTML
67 lines
4.6 KiB
HTML
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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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<HTML>
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<TITLE>CLHS: Function FILE-WRITE-DATE</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_file_a.htm"><IMG WIDTH=40 HEIGHT=40 ALT="[Previous]" SRC="../Graphics/Prev.gif" ALIGN=Bottom></A><A REL=UP HREF="c_files.htm"><IMG WIDTH=40 HEIGHT=40 ALT="[Up]" SRC="../Graphics/Up.gif" ALIGN=Bottom></A><A REL=NEXT HREF="f_rn_fil.htm"><IMG WIDTH=40 HEIGHT=40 ALT="[Next]" SRC="../Graphics/Next.gif" ALIGN=Bottom></A></H1>
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<HR>
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<A NAME="file-write-date"><I>Function</I> <B>FILE-WRITE-DATE</B></A> <P>
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<P><B>Syntax:</B><P>
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<P>
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<B>file-write-date</B> <I>pathspec</I> => <I>date</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>pathspec</I>---a <A REL=DEFINITION HREF="26_glo_p.htm#pathname_designator"><I>pathname designator</I></A>. <P>
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<I>date</I>---a <A REL=DEFINITION HREF="26_glo_u.htm#universal_time"><I>universal time</I></A> or <A REL=DEFINITION HREF="a_nil.htm#nil"><B>nil</B></A>. <P>
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<P><B>Description:</B><P>
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<P>
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Returns a <A REL=DEFINITION HREF="26_glo_u.htm#universal_time"><I>universal time</I></A> representing the time at which the <A REL=DEFINITION HREF="26_glo_f.htm#file"><I>file</I></A> specified by <I>pathspec</I> was last written (or created), or returns <A REL=DEFINITION HREF="a_nil.htm#nil"><B>nil</B></A> if such a time cannot be determined. <P>
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<P><B>Examples:</B><P>
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<P>
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<PRE>
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(with-open-file (s "noel.text"
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:direction :output :if-exists :error)
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(format s "~&Dear Santa,~2%I was good this year. ~
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Please leave lots of toys.~2%Love, Sue~
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~2%attachments: milk, cookies~%")
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(truename s))
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=> #P"CUPID:/susan/noel.text"
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(with-open-file (s "noel.text")
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(file-write-date s))
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=> 2902600800
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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 host computer's file system. <P>
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<P><B>Exceptional Situations:</B><P>
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<P>
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An error of <A REL=DEFINITION HREF="26_glo_t.htm#type"><I>type</I></A> <A REL=DEFINITION HREF="e_file_e.htm#file-error"><B>file-error</B></A> is signaled if <I>pathspec</I> is <A REL=DEFINITION HREF="26_glo_w.htm#wild"><I>wild</I></A>. <P>
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An error of <A REL=DEFINITION HREF="26_glo_t.htm#type"><I>type</I></A> <A REL=DEFINITION HREF="e_file_e.htm#file-error"><B>file-error</B></A> is signaled if the <A REL=DEFINITION HREF="26_glo_f.htm#file_system"><I>file system</I></A> cannot perform the requested operation. <P>
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<P><B>See Also:</B><P>
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<P>
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<A REL=CHILD HREF="25_adb.htm">Section 25.1.4.2 (Universal Time)</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/iss267.htm">PATHNAME-WILD:NEW-FUNCTIONS</A><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><P></UL><HR>
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