321 lines
6.6 KiB
HTML
321 lines
6.6 KiB
HTML
|
<!DOCTYPE HTML>
|
||
|
|
<HTML LANG="en-us"
|
||
|
|
><HEAD
|
||
|
|
><TITLE
|
||
|
|
>delete-file | Common Lisp Nova Spec</TITLE
|
||
|
|
><META CHARSET="US-ASCII"
|
||
|
|
><LINK REL="canonical" HREF="f_delete-file.html"
|
||
|
|
><LINK REL="next" HREF="t_file-error.html" TYPE="text/html" TITLE="file-error"
|
||
|
|
><LINK REL="prev" HREF="f_rename-file.html" TYPE="text/html" TITLE="rename-file"
|
||
|
|
><LINK REL="up" HREF="20_2_Files_Dictionary.html" TYPE="text/html" TITLE="20.2 Files Dictionary"
|
||
|
|
><LINK REL="start" HREF="index.html" TYPE="text/html" TITLE="Common Lisp Nova Spec"
|
||
|
|
><META NAME="VIEWPORT" CONTENT="width=device-width, initial-scale=1.0"
|
||
|
|
><LINK REL="STYLESHEET" HREF="dpans.css%3F3909942064.css"
|
||
|
|
><SCRIPT SRC="dpans.js%3F3909942064"
|
||
|
|
></SCRIPT
|
||
|
|
><SCRIPT SRC="apropos.js%3F3909942064"
|
||
|
|
></SCRIPT
|
||
|
|
></HEAD
|
||
|
|
><BODY
|
||
|
|
><DIV
|
||
|
|
><DIV CLASS="topnav"
|
||
|
|
><DIV CLASS="breadcrumb"
|
||
|
|
><SPAN CLASS="breadcrumb-item"
|
||
|
|
><A HREF="index.html"
|
||
|
|
>Common Lisp Nova Spec</A
|
||
|
|
></SPAN
|
||
|
|
> <SPAN CLASS="breadcrumb-item"
|
||
|
|
>→ <A HREF="20_Files.html"
|
||
|
|
>20. Files</A
|
||
|
|
></SPAN
|
||
|
|
> <SPAN CLASS="breadcrumb-item"
|
||
|
|
>→ <A HREF="20_2_Files_Dictionary.html"
|
||
|
|
>20.2 Files Dictionary</A
|
||
|
|
></SPAN
|
||
|
|
> <SPAN CLASS="breadcrumb-item"
|
||
|
|
>→ <A HREF="f_delete-file.html"
|
||
|
|
>delete-file</A
|
||
|
|
></SPAN
|
||
|
|
></DIV
|
||
|
|
><DIV CLASS="apropos"
|
||
|
|
><DIV CLASS="apropos-io"
|
||
|
|
><A HREF="f_rename-file.html" CLASS="prev"
|
||
|
|
>←</A
|
||
|
|
><SPAN ID="apropos-label"
|
||
|
|
>Apropos </SPAN
|
||
|
|
><INPUT ID="apropos" AUTOFOCUS="AUTOFOCUS" PLACEHOLDER="Type here to search" ONINPUT="aproposInput(this);" ONKEYUP="aproposKeyup(event);" ONCHANGE="aproposChange(this);" ONFOCUS="aproposFocus(this);" ONFOCUSOUT="aproposFocusout(this);"
|
||
|
|
><A HREF="t_file-error.html" CLASS="next"
|
||
|
|
>→</A
|
||
|
|
></DIV
|
||
|
|
><DIV ID="apropos-res"
|
||
|
|
></DIV
|
||
|
|
></DIV
|
||
|
|
></DIV
|
||
|
|
><DIV CLASS="matter"
|
||
|
|
><DIV CLASS="com"
|
||
|
|
><DIV CLASS="begincom"
|
||
|
|
><HR
|
||
|
|
><TABLE WIDTH="100%" CELLSPACING="0" CELLPADDING="0"
|
||
|
|
><TR
|
||
|
|
><TD ALIGN="LEFT" VALIGN="BASELINE" WIDTH="100%" CLASS="name"
|
||
|
|
><SPAN CLASS="idx" DATA-KIND="idxref" DATA-TERM="delete-file"
|
||
|
|
></SPAN
|
||
|
|
><B
|
||
|
|
>delete-file</B
|
||
|
|
></TD
|
||
|
|
><TD ALIGN="RIGHT" VALIGN="BASELINE" WIDTH="0" NOWRAP="NOWRAP" CLASS="ftype"
|
||
|
|
><I
|
||
|
|
>Function</I
|
||
|
|
></TD
|
||
|
|
></TR
|
||
|
|
></TABLE
|
||
|
|
><HR
|
||
|
|
></DIV
|
||
|
|
><UL CLASS="subtoc"
|
||
|
|
></UL
|
||
|
|
><DL
|
||
|
|
><DT
|
||
|
|
><B
|
||
|
|
>Syntax</B
|
||
|
|
></DT
|
||
|
|
><DD
|
||
|
|
><P CLASS="j"
|
||
|
|
><B
|
||
|
|
>delete-file</B
|
||
|
|
> <SPAN CLASS="cmssi"
|
||
|
|
>filespec</SPAN
|
||
|
|
> <SPAN CLASS="arrow"
|
||
|
|
>→</SPAN
|
||
|
|
> <SPAN CLASS="misc"
|
||
|
|
><B
|
||
|
|
>t</B
|
||
|
|
></SPAN
|
||
|
|
></P
|
||
|
|
></DD
|
||
|
|
><DT
|
||
|
|
><B
|
||
|
|
>Arguments and Values</B
|
||
|
|
></DT
|
||
|
|
><DD
|
||
|
|
><P CLASS="j"
|
||
|
|
><VAR CLASS="param"
|
||
|
|
>filespec</VAR
|
||
|
|
> — a <A HREF="26_1_Glossary.html#pathname_designator"
|
||
|
|
><EM CLASS="term"
|
||
|
|
>pathname designator</EM
|
||
|
|
></A
|
||
|
|
>.</P
|
||
|
|
></DD
|
||
|
|
><DT
|
||
|
|
><B
|
||
|
|
>Description</B
|
||
|
|
></DT
|
||
|
|
><DD
|
||
|
|
><P CLASS="j"
|
||
|
|
>Deletes the <A HREF="26_1_Glossary.html#file"
|
||
|
|
><EM CLASS="term"
|
||
|
|
>file</EM
|
||
|
|
></A
|
||
|
|
> specified by <VAR CLASS="param"
|
||
|
|
>filespec</VAR
|
||
|
|
>. </P
|
||
|
|
><P CLASS="j"
|
||
|
|
>If the <VAR CLASS="param"
|
||
|
|
>filespec</VAR
|
||
|
|
> <A HREF="26_1_Glossary.html#designator"
|
||
|
|
><EM CLASS="term"
|
||
|
|
>designator</EM
|
||
|
|
></A
|
||
|
|
> is an open <A HREF="26_1_Glossary.html#stream"
|
||
|
|
><EM CLASS="term"
|
||
|
|
>stream</EM
|
||
|
|
></A
|
||
|
|
>, then <VAR CLASS="param"
|
||
|
|
>filespec</VAR
|
||
|
|
> and the file associated with it are affected (if the file system permits), in which case <VAR CLASS="param"
|
||
|
|
>filespec</VAR
|
||
|
|
> might be closed immediately, and the deletion might be immediate or delayed until <VAR CLASS="param"
|
||
|
|
>filespec</VAR
|
||
|
|
> is explicitly closed, depending on the requirements of the file system. </P
|
||
|
|
><P CLASS="j"
|
||
|
|
>It is <A HREF="26_1_Glossary.html#implementation-dependent"
|
||
|
|
><EM CLASS="term"
|
||
|
|
>implementation-dependent</EM
|
||
|
|
></A
|
||
|
|
> whether an attempt to delete a nonexistent file is considered to be successful. </P
|
||
|
|
><P CLASS="j"
|
||
|
|
><A HREF="f_delete-file.html" CLASS="funref"
|
||
|
|
><B
|
||
|
|
>delete-file</B
|
||
|
|
></A
|
||
|
|
> returns <A HREF="26_1_Glossary.html#true"
|
||
|
|
><EM CLASS="term"
|
||
|
|
>true</EM
|
||
|
|
></A
|
||
|
|
> if it succeeds, or signals an error of <A HREF="26_1_Glossary.html#type"
|
||
|
|
><EM CLASS="term"
|
||
|
|
>type</EM
|
||
|
|
></A
|
||
|
|
> <A HREF="t_file-error.html" CLASS="typeref"
|
||
|
|
><B
|
||
|
|
>file-error</B
|
||
|
|
></A
|
||
|
|
> if it does not. </P
|
||
|
|
><P CLASS="j"
|
||
|
|
>The consequences are undefined if <VAR CLASS="param"
|
||
|
|
>filespec</VAR
|
||
|
|
> has a <A HREF="26_1_Glossary.html#wild"
|
||
|
|
><EM CLASS="term"
|
||
|
|
>wild</EM
|
||
|
|
></A
|
||
|
|
> component, or if <VAR CLASS="param"
|
||
|
|
>filespec</VAR
|
||
|
|
> has a <SPAN CLASS="misc"
|
||
|
|
><B
|
||
|
|
>nil</B
|
||
|
|
></SPAN
|
||
|
|
> component and the file system does not permit a <SPAN CLASS="misc"
|
||
|
|
><B
|
||
|
|
>nil</B
|
||
|
|
></SPAN
|
||
|
|
> component.</P
|
||
|
|
></DD
|
||
|
|
><DT
|
||
|
|
><B
|
||
|
|
>Examples</B
|
||
|
|
></DT
|
||
|
|
><DD
|
||
|
|
><PRE CLASS="screen"
|
||
|
|
> (with-open-file (s "delete-me.text" :direction :output :if-exists :error))
|
||
|
|
<SPAN CLASS="cmsy"
|
||
|
|
><SPAN CLASS="arrow"
|
||
|
|
>→</SPAN
|
||
|
|
></SPAN
|
||
|
|
> NIL
|
||
|
|
(setq p (probe-file "delete-me.text")) <SPAN CLASS="cmsy"
|
||
|
|
><SPAN CLASS="arrow"
|
||
|
|
>→</SPAN
|
||
|
|
></SPAN
|
||
|
|
> #P"R:>fred>delete-me.text.1"
|
||
|
|
(delete-file p) <SPAN CLASS="cmsy"
|
||
|
|
><SPAN CLASS="arrow"
|
||
|
|
>→</SPAN
|
||
|
|
></SPAN
|
||
|
|
> T
|
||
|
|
(probe-file "delete-me.text") <SPAN CLASS="cmsy"
|
||
|
|
><SPAN CLASS="arrow"
|
||
|
|
>→</SPAN
|
||
|
|
></SPAN
|
||
|
|
> <A HREF="26_1_Glossary.html#false"
|
||
|
|
><EM CLASS="term"
|
||
|
|
>false</EM
|
||
|
|
></A
|
||
|
|
>
|
||
|
|
(with-open-file (s "delete-me.text" :direction :output :if-exists :error)
|
||
|
|
(delete-file s))
|
||
|
|
<SPAN CLASS="cmsy"
|
||
|
|
><SPAN CLASS="arrow"
|
||
|
|
>→</SPAN
|
||
|
|
></SPAN
|
||
|
|
> T
|
||
|
|
(probe-file "delete-me.text") <SPAN CLASS="cmsy"
|
||
|
|
><SPAN CLASS="arrow"
|
||
|
|
>→</SPAN
|
||
|
|
></SPAN
|
||
|
|
> <A HREF="26_1_Glossary.html#false"
|
||
|
|
><EM CLASS="term"
|
||
|
|
>false</EM
|
||
|
|
></A
|
||
|
|
></PRE
|
||
|
|
></DD
|
||
|
|
><DT
|
||
|
|
><B
|
||
|
|
>Exceptional Situations</B
|
||
|
|
></DT
|
||
|
|
><DD
|
||
|
|
><P CLASS="j"
|
||
|
|
>If the deletion operation is not successful, an error of <A HREF="26_1_Glossary.html#type"
|
||
|
|
><EM CLASS="term"
|
||
|
|
>type</EM
|
||
|
|
></A
|
||
|
|
> <A HREF="t_file-error.html" CLASS="typeref"
|
||
|
|
><B
|
||
|
|
>file-error</B
|
||
|
|
></A
|
||
|
|
> is signaled. </P
|
||
|
|
><P CLASS="j"
|
||
|
|
>An error of <A HREF="26_1_Glossary.html#type"
|
||
|
|
><EM CLASS="term"
|
||
|
|
>type</EM
|
||
|
|
></A
|
||
|
|
> <A HREF="t_file-error.html" CLASS="typeref"
|
||
|
|
><B
|
||
|
|
>file-error</B
|
||
|
|
></A
|
||
|
|
> might be signaled if <VAR CLASS="param"
|
||
|
|
>filespec</VAR
|
||
|
|
> is <A HREF="26_1_Glossary.html#wild"
|
||
|
|
><EM CLASS="term"
|
||
|
|
>wild</EM
|
||
|
|
></A
|
||
|
|
>.</P
|
||
|
|
></DD
|
||
|
|
><DT
|
||
|
|
><B
|
||
|
|
>See Also</B
|
||
|
|
></DT
|
||
|
|
><DD
|
||
|
|
><P CLASS="j"
|
||
|
|
><A HREF="t_pathname.html" CLASS="typeref"
|
||
|
|
><B
|
||
|
|
>pathname</B
|
||
|
|
></A
|
||
|
|
>, <A HREF="t_logical-pathname.html" CLASS="typeref"
|
||
|
|
><B
|
||
|
|
>logical-pathname</B
|
||
|
|
></A
|
||
|
|
>, <A HREF="20_1_File_System_Concepts.html#sec_20_1" CLASS="secref"
|
||
|
|
><SPAN CLASS="cmr"
|
||
|
|
>Section</SPAN
|
||
|
|
> <SPAN CLASS="cmr"
|
||
|
|
>20.1</SPAN
|
||
|
|
> <SPAN CLASS="cmr"
|
||
|
|
>(File</SPAN
|
||
|
|
> <SPAN CLASS="cmr"
|
||
|
|
>System</SPAN
|
||
|
|
> <SPAN CLASS="cmr"
|
||
|
|
>Concepts)</SPAN
|
||
|
|
></A
|
||
|
|
>, <A HREF="19_1_Overview_of_Filenames.html#sec_19_1_2" CLASS="secref"
|
||
|
|
><SPAN CLASS="cmr"
|
||
|
|
>Section</SPAN
|
||
|
|
> <SPAN CLASS="cmr"
|
||
|
|
>19.1.2</SPAN
|
||
|
|
> <SPAN CLASS="cmr"
|
||
|
|
>(Pathnames</SPAN
|
||
|
|
> <SPAN CLASS="cmr"
|
||
|
|
>as</SPAN
|
||
|
|
> <SPAN CLASS="cmr"
|
||
|
|
>Filenames)</SPAN
|
||
|
|
></A
|
||
|
|
></P
|
||
|
|
></DD
|
||
|
|
></DL
|
||
|
|
></DIV
|
||
|
|
></DIV
|
||
|
|
><DIV CLASS="footer"
|
||
|
|
><DIV CLASS="btmnav"
|
||
|
|
><A HREF="f_rename-file.html" CLASS="prev"
|
||
|
|
>←</A
|
||
|
|
><A HREF="t_file-error.html" CLASS="next"
|
||
|
|
>→</A
|
||
|
|
></DIV
|
||
|
|
><DIV CLASS="trail"
|
||
|
|
>Conversion to HTML copyright 2023 by Gilbert Baumann</DIV
|
||
|
|
></DIV
|
||
|
|
></DIV
|
||
|
|
><SCRIPT
|
||
|
|
>domReady();</SCRIPT
|
||
|
|
></BODY
|
||
|
|
></HTML
|
||
|
|
>
|