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<html><head><meta http-equiv="content-type" content="text/html; charset=utf-8"/><title>31 Unix Domain Sockets</title><link rel="stylesheet" type="text/css" href="../scribble.css" title="default"/><link rel="stylesheet" type="text/css" href="../racket.css" title="default"/><link rel="stylesheet" type="text/css" href="../manual-style.css" title="default"/><link rel="stylesheet" type="text/css" href="../manual-racket.css" title="default"/><link rel="stylesheet" type="text/css" href="../manual-racket.css" title="default"/><link rel="stylesheet" type="text/css" href="../doc-site.css" title="default"/><script type="text/javascript" src="../scribble-common.js"></script><script type="text/javascript" src="../manual-racket.js"></script><script type="text/javascript" src="../manual-racket.js"></script><script type="text/javascript" src="../doc-site.js"></script><script type="text/javascript" src="../local-redirect/local-redirect.js"></script><script type="text/javascript" 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Syntax</a></td></tr></table></div></div></div><div class="tocsub"><div class="tocsubtitle">On this page:</div><table class="tocsublist" cellspacing="0"><tr><td><a href="#%28def._%28%28lib._unstable%2Fsocket..rkt%29._unix-socket-available~3f%29%29" class="tocsublink" data-pltdoc="x"><span class="RktSym"><span class="RktValLink">unix-<wbr></wbr>socket-<wbr></wbr>available?</span></span></a></td></tr><tr><td><a href="#%28def._%28%28lib._unstable%2Fsocket..rkt%29._unix-socket-connect%29%29" class="tocsublink" data-pltdoc="x"><span class="RktSym"><span class="RktValLink">unix-<wbr></wbr>socket-<wbr></wbr>connect</span></span></a></td></tr><tr><td><a href="#%28def._%28%28lib._unstable%2Fsocket..rkt%29._unix-socket-path~3f%29%29" class="tocsublink" data-pltdoc="x"><span class="RktSym"><span class="RktValLink">unix-<wbr></wbr>socket-<wbr></wbr>path?</span></span></a></td></tr></table></div></div><div class="maincolumn"><div class="main"><div class="versionbox"><span class="version">6.1</span></div><div class="navsettop"><span class="navleft"><form class="searchform"><input class="searchbox" style="color: #888;" type="text" value="...search manuals..." title="Enter a search string to search the manuals" onkeypress="return DoSearchKey(event, this, "6.1", "../");" onfocus="this.style.color="black"; this.style.textAlign="left"; if (this.value == "...search manuals...") this.value="";" onblur="if (this.value.match(/^ *$/)) { this.style.color="#888"; this.style.textAlign="center"; this.value="...search manuals..."; }"/></form> <a href="../index.html" title="up to the documentation top" data-pltdoc="x" onclick="return GotoPLTRoot("6.1");">top</a></span><span class="navright"> <a href="temp-c.html" title="backward to "30 Temporal Contracts: Explicit Contract Monitors"" data-pltdoc="x">← prev</a> <a href="index.html" title="up to "Unstable: May Change Without Warning"" data-pltdoc="x">up</a> <a href="2d.html" title="forward to "32 2D Syntax"" data-pltdoc="x">next →</a></span> </div><h3 x-source-module="(lib "unstable/scribblings/unstable.scrbl")" x-part-tag=""unix-socket"">31<tt> </tt><a name="(part._unix-socket)"></a><a name="(mod-path._unstable/socket)"></a>Unix Domain Sockets</h3><p>This library is <span style="font-style: italic">unstable</span>;
compatibility will not be maintained.
See <a href="index.html" data-pltdoc="x">Unstable: May Change Without Warning</a>
for more information.</p><p><table cellspacing="0" cellpadding="0" class="defmodule"><tr><td align="left"><span class="hspace"> </span><span class="RktPn">(</span><span class="RktSym"><a href="http://download.racket-lang.org/docs/6.1/html/local-redirect/index.html?doc=reference&rel=require.html%23%2528form._%2528%2528lib._racket%252Fprivate%252Fbase..rkt%2529._require%2529%2529&version=6.1" class="RktStxLink Sq" data-pltdoc="x">require</a></span><span class="stt"> </span><a href="" class="RktModLink" data-pltdoc="x"><span class="RktSym">unstable/socket</span></a><span class="RktPn">)</span></td><td align="right"><span class="RpackageSpec"><span class="Smaller"> package:</span> <span class="stt">base</span></span></td></tr></table></p><p><div class="SIntrapara"><blockquote class="SVInsetFlow"><table cellspacing="0" cellpadding="0" class="boxed RBoxed"><tr><td><blockquote class="SubFlow"><div class="RBackgroundLabel SIEHidden"><div class="RBackgroundLabelInner"><p>value</p></div></div><p class="RForeground"><a name="(def._((lib._unstable/socket..rkt)._unix-socket-available~3f))"></a><span title="Provided from: unstable/socket | Package: base"><span class="RktSym"><a href="#%28def._%28%28lib._unstable%2Fsocket..rkt%29._unix-socket-available~3f%29%29" class="RktValDef RktValLink" data-pltdoc="x">unix-socket-available?</a></span></span><span class="hspace"> </span>:<span class="hspace"> </span><span class="RktSym"><a href="http://download.racket-lang.org/docs/6.1/html/local-redirect/index.html?doc=reference&rel=booleans.html%23%2528def._%2528%2528quote._%7E23%7E25kernel%2529._boolean%7E3f%2529%2529&version=6.1" class="RktValLink Sq" data-pltdoc="x">boolean?</a></span></p></blockquote></td></tr></table></blockquote></div><div class="SIntrapara">A boolean value that indicates whether unix domain sockets are
available and supported on the current platform. The supported
platforms are Linux and Mac OS X; unix domain sockets are not
supported on Windows and other Unix variants.</div></p><p><div class="SIntrapara"><blockquote class="SVInsetFlow"><table cellspacing="0" cellpadding="0" class="boxed RBoxed"><tr><td><blockquote class="SubFlow"><div class="RBackgroundLabel SIEHidden"><div class="RBackgroundLabelInner"><p>procedure</p></div></div><table cellspacing="0" cellpadding="0" class="prototype RForeground"><tr><td><span class="RktPn">(</span><a name="(def._((lib._unstable/socket..rkt)._unix-socket-connect))"></a><span title="Provided from: unstable/socket | Package: base"><span class="RktSym"><a href="#%28def._%28%28lib._unstable%2Fsocket..rkt%29._unix-socket-connect%29%29" class="RktValDef RktValLink" data-pltdoc="x">unix-socket-connect</a></span></span><span class="hspace"> </span><span class="RktVar">socket-path</span><span class="RktPn">)</span></td><td><span class="hspace"> </span></td><td>→</td><td><span class="hspace"> </span></td><td><table cellspacing="0" cellpadding="0"><tr><td><span class="RktSym"><a href="http://download.racket-lang.org/docs/6.1/html/local-redirect/index.html?doc=reference&rel=port-ops.html%23%2528def._%2528%2528quote._%7E23%7E25kernel%2529._input-port%7E3f%2529%2529&version=6.1" class="RktValLink Sq" data-pltdoc="x">input-port?</a></span></td><td><span class="hspace"> </span></td><td><span class="RktSym"><a href="http://download.racket-lang.org/docs/6.1/html/local-redirect/index.html?doc=reference&rel=port-ops.html%23%2528def._%2528%2528quote._%7E23%7E25kernel%2529._output-port%7E3f%2529%2529&version=6.1" class="RktValLink Sq" data-pltdoc="x">output-port?</a></span></td></tr></table></td></tr></table></blockquote></td></tr><tr><td><span class="hspace"> </span><span class="RktVar">socket-path</span><span class="hspace"> </span>:<span class="hspace"> </span><span class="RktSym"><a href="#%28def._%28%28lib._unstable%2Fsocket..rkt%29._unix-socket-path~3f%29%29" class="RktValLink" data-pltdoc="x">unix-socket-path?</a></span></td></tr></table></blockquote></div><div class="SIntrapara">Connects to the unix domain socket associated with
<span class="RktVar">socket-path</span> and returns an input port and output port for
communicating with the socket.</div></p><p><div class="SIntrapara"><blockquote class="SVInsetFlow"><table cellspacing="0" cellpadding="0" class="boxed RBoxed"><tr><td><blockquote class="SubFlow"><div class="RBackgroundLabel SIEHidden"><div class="RBackgroundLabelInner"><p>procedure</p></div></div><p class="RForeground"><span class="RktPn">(</span><a name="(def._((lib._unstable/socket..rkt)._unix-socket-path~3f))"></a><span title="Provided from: unstable/socket | Package: base"><span class="RktSym"><a href="#%28def._%28%28lib._unstable%2Fsocket..rkt%29._unix-socket-path~3f%29%29" class="RktValDef RktValLink" data-pltdoc="x">unix-socket-path?</a></span></span><span class="hspace"> </span><span class="RktVar">v</span><span class="RktPn">)</span><span class="hspace"> </span>→<span class="hspace"> </span><span class="RktSym"><a href="http://download.racket-lang.org/docs/6.1/html/local-redirect/index.html?doc=reference&rel=booleans.html%23%2528def._%2528%2528quote._%7E23%7E25kernel%2529._boolean%7E3f%2529%2529&version=6.1" class="RktValLink Sq" data-pltdoc="x">boolean?</a></span></p></blockquote></td></tr><tr><td><span class="hspace"> </span><span class="RktVar">v</span><span class="hspace"> </span>:<span class="hspace"> </span><span class="RktSym"><a href="http://download.racket-lang.org/docs/6.1/html/local-redirect/index.html?doc=reference&rel=data-structure-contracts.html%23%2528def._%2528%2528lib._racket%252Fcontract%252Fprivate%252Fmisc..rkt%2529._any%252Fc%2529%2529&version=6.1" class="RktValLink Sq" data-pltdoc="x">any/c</a></span></td></tr></table></blockquote></div><div class="SIntrapara">Returns <span class="RktVal">#t</span> if <span class="RktVar">v</span> is a valid unix domain socket path
for the current system, according to the following cases:</div></p><ul><li><p>If <span class="RktVar">v</span> is a path (<span class="RktSym"><a href="http://download.racket-lang.org/docs/6.1/html/local-redirect/index.html?doc=reference&rel=Manipulating_Paths.html%23%2528def._%2528%2528lib._racket%252Fprivate%252Fmisc..rkt%2529._path-string%7E3f%2529%2529&version=6.1" class="RktValLink Sq" data-pltdoc="x">path-string?</a></span>), then the
current platform must be either Linux or Mac OS X, and the length of
<span class="RktVar">v</span>’s corresponding absolute path must be less than or equal to
the platform-specific length (108 bytes on Linux, 104 bytes on Mac OS
X). Example: <span class="RktVal">"/tmp/mysocket"</span>.</p></li><li><p>If <span class="RktVar">v</span> is a bytestring (<span class="RktSym"><a href="http://download.racket-lang.org/docs/6.1/html/local-redirect/index.html?doc=reference&rel=bytestrings.html%23%2528def._%2528%2528quote._%7E23%7E25kernel%2529._bytes%7E3f%2529%2529&version=6.1" class="RktValLink Sq" data-pltdoc="x">bytes?</a></span>), then the
current platform must be Linux, <span class="RktVar">v</span> must start with a
<span class="RktVal">0</span> (NUL) byte, and its length must be less than or equal to
108 bytes. Such a value refers to a socket in the Linux abstract
socket namespace. Example: <span class="RktVal">#"\0mysocket"</span>.</p></li></ul><p>Otherwise, returns <span class="RktVal">#f</span>.</p><div class="navsetbottom"><span class="navleft"><form class="searchform"><input class="searchbox" style="color: #888;" type="text" value="...search manuals..." title="Enter a search string to search the manuals" onkeypress="return DoSearchKey(event, this, "6.1", "../");" onfocus="this.style.color="black"; this.style.textAlign="left"; if (this.value == "...search manuals...") this.value="";" onblur="if (this.value.match(/^ *$/)) { this.style.color="#888"; this.style.textAlign="center"; this.value="...search manuals..."; }"/></form> <a href="../index.html" title="up to the documentation top" data-pltdoc="x" onclick="return GotoPLTRoot("6.1");">top</a></span><span class="navright"> <a href="temp-c.html" title="backward to "30 Temporal Contracts: Explicit Contract Monitors"" data-pltdoc="x">← prev</a> <a href="index.html" title="up to "Unstable: May Change Without Warning"" data-pltdoc="x">up</a> <a href="2d.html" title="forward to "32 2D Syntax"" data-pltdoc="x">next →</a></span> </div></div></div><div id="contextindicator"> </div></body></html>
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