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<!DOCTYPE HTML>
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>probe-file | Common Lisp Nova Spec</TITLE
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>Common Lisp Nova Spec</A
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> <SPAN CLASS="breadcrumb-item"
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>→ <A HREF="20_Files.html"
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>20. Files</A
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> <SPAN CLASS="breadcrumb-item"
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>→ <A HREF="20_2_Files_Dictionary.html"
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>20.2 Files Dictionary</A
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> <SPAN CLASS="breadcrumb-item"
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>→ <A HREF="f_probe-file.html"
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>probe-file</A
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><A HREF="f_directory.html" CLASS="prev"
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>←</A
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><SPAN ID="apropos-label"
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>Apropos </SPAN
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><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);"
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><DIV ID="apropos-res"
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></DIV
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><DIV CLASS="matter"
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><DIV CLASS="com"
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><DIV CLASS="begincom"
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><HR
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><TABLE WIDTH="100%" CELLSPACING="0" CELLPADDING="0"
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><TR
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><TD ALIGN="LEFT" VALIGN="BASELINE" WIDTH="100%" CLASS="name"
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><SPAN CLASS="idx" DATA-KIND="idxref" DATA-TERM="probe-file"
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></SPAN
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><B
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>probe-file</B
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></TD
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><TD ALIGN="RIGHT" VALIGN="BASELINE" WIDTH="0" NOWRAP="NOWRAP" CLASS="ftype"
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><I
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>Function</I
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></TD
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></TR
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></TABLE
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><HR
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></DIV
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><UL CLASS="subtoc"
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></UL
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><DL
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><DT
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><B
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>Syntax</B
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></DT
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><DD
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><P CLASS="j"
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><B
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>probe-file</B
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> <SPAN CLASS="cmssi"
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>pathspec</SPAN
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> <SPAN CLASS="arrow"
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>→</SPAN
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> <SPAN CLASS="cmssi"
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>truename</SPAN
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></P
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></DD
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><DT
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><B
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>Arguments and Values</B
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></DT
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><DD
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><P CLASS="j"
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><VAR CLASS="param"
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>pathspec</VAR
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> — a <A HREF="26_1_Glossary.html#pathname_designator"
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><EM CLASS="term"
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>pathname designator</EM
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></A
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>. </P
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><P CLASS="j"
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><VAR CLASS="param"
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>truename</VAR
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> — a <A HREF="26_1_Glossary.html#physical_pathname"
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><EM CLASS="term"
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>physical pathname</EM
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></A
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> or <SPAN CLASS="misc"
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><B
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>nil</B
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></SPAN
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>.</P
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></DD
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><DT
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><B
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>Description</B
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></DT
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><DD
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><P CLASS="j"
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><A HREF="f_probe-file.html" CLASS="funref"
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><B
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>probe-file</B
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></A
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> tests whether a file exists. </P
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><P CLASS="j"
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><A HREF="f_probe-file.html" CLASS="funref"
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><B
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>probe-file</B
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></A
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> returns <A HREF="26_1_Glossary.html#false"
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><EM CLASS="term"
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>false</EM
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></A
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> if there is no file named <VAR CLASS="param"
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>pathspec</VAR
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>, and otherwise returns the <A HREF="26_1_Glossary.html#truename"
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><EM CLASS="term"
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>truename</EM
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></A
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> of <VAR CLASS="param"
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>pathspec</VAR
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>. </P
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><P CLASS="j"
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>If the <VAR CLASS="param"
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>pathspec</VAR
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> <A HREF="26_1_Glossary.html#designator"
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><EM CLASS="term"
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>designator</EM
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></A
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> is an open <A HREF="26_1_Glossary.html#stream"
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><EM CLASS="term"
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>stream</EM
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></A
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>, then <A HREF="f_probe-file.html" CLASS="funref"
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><B
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>probe-file</B
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></A
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> produces the <A HREF="26_1_Glossary.html#truename"
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><EM CLASS="term"
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>truename</EM
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></A
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> of its associated <A HREF="26_1_Glossary.html#file"
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><EM CLASS="term"
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>file</EM
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></A
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>. If <VAR CLASS="param"
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>pathspec</VAR
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> is a <A HREF="26_1_Glossary.html#stream"
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><EM CLASS="term"
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>stream</EM
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></A
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>, whether open or closed, it is coerced to a <A HREF="26_1_Glossary.html#pathname"
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><EM CLASS="term"
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>pathname</EM
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></A
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> as if by the <A HREF="26_1_Glossary.html#function"
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><EM CLASS="term"
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>function</EM
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></A
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> <A HREF="f_pathname.html" CLASS="funref"
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><B
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>pathname</B
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></A
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>.</P
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></DD
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><DT
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><B
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>Affected By</B
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></DT
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><DD
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><P CLASS="j"
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>The host computer’s file system.</P
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></DD
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><DT
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><B
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>Exceptional Situations</B
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></DT
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><DD
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><P CLASS="j"
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>An error of <A HREF="26_1_Glossary.html#type"
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><EM CLASS="term"
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>type</EM
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></A
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> <A HREF="t_file-error.html" CLASS="typeref"
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><B
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>file-error</B
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></A
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> is signaled if <VAR CLASS="param"
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>pathspec</VAR
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> is <A HREF="26_1_Glossary.html#wild"
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><EM CLASS="term"
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>wild</EM
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></A
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>. </P
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><P CLASS="j"
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>An error of <A HREF="26_1_Glossary.html#type"
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><EM CLASS="term"
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>type</EM
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></A
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> <A HREF="t_file-error.html" CLASS="typeref"
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><B
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>file-error</B
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></A
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> is signaled if the <A HREF="26_1_Glossary.html#file_system"
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><EM CLASS="term"
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>file system</EM
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></A
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> cannot perform the requested operation.</P
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></DD
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><DT
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><B
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>See Also</B
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></DT
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><DD
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><P CLASS="j"
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><A HREF="f_truename.html" CLASS="funref"
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><B
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>truename</B
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></A
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>, <A HREF="f_open.html" CLASS="funref"
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><B
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>open</B
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></A
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>, <A HREF="f_ensure-directories-exist.html" CLASS="funref"
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><B
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>ensure-directories-exist</B
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></A
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>, <A HREF="t_pathname.html" CLASS="typeref"
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><B
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>pathname</B
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></A
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>, <A HREF="t_logical-pathname.html" CLASS="typeref"
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><B
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>logical-pathname</B
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></A
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>, <A HREF="20_1_File_System_Concepts.html#sec_20_1" CLASS="secref"
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><SPAN CLASS="cmr"
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>Section</SPAN
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> <SPAN CLASS="cmr"
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>20.1</SPAN
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> <SPAN CLASS="cmr"
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>(File</SPAN
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> <SPAN CLASS="cmr"
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>System</SPAN
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> <SPAN CLASS="cmr"
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>Concepts)</SPAN
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></A
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>, <A HREF="21_1_Stream_Concepts.html#sec_21_1_1_1_2" CLASS="secref"
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><SPAN CLASS="cmr"
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>Section</SPAN
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> <SPAN CLASS="cmr"
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>21.1.1.1.2</SPAN
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> <SPAN CLASS="cmr"
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>(Open</SPAN
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> <SPAN CLASS="cmr"
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>and</SPAN
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> <SPAN CLASS="cmr"
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>Closed</SPAN
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> <SPAN CLASS="cmr"
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>Streams)</SPAN
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></A
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>, <A HREF="19_1_Overview_of_Filenames.html#sec_19_1_2" CLASS="secref"
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><SPAN CLASS="cmr"
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>Section</SPAN
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> <SPAN CLASS="cmr"
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>19.1.2</SPAN
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> <SPAN CLASS="cmr"
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>(Pathnames</SPAN
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> <SPAN CLASS="cmr"
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>as</SPAN
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> <SPAN CLASS="cmr"
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>Filenames)</SPAN
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></A
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></P
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></DD
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></DL
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></DIV
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></DIV
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><DIV CLASS="footer"
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><A HREF="f_directory.html" CLASS="prev"
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>Conversion to HTML copyright 2023 by Gilbert Baumann</DIV
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