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<h1>luaposix 33.3.0</h1>
<ul>
<li><a href="../index.html">Index</a></li>
</ul>
<h2>Contents</h2>
<ul>
<li><a href="#Functions">Functions</a></li>
<li><a href="#Constants">Constants </a></li>
</ul>
<h2>Modules</h2>
<ul class="$(kind=='Topics' and '' or 'nowrap'">
<li><a href="../modules/posix.html">posix</a></li>
<li><a href="../modules/posix.ctype.html">posix.ctype</a></li>
<li><a href="../modules/posix.curses.html">posix.curses</a></li>
<li><a href="../modules/posix.dirent.html">posix.dirent</a></li>
<li><a href="../modules/posix.errno.html">posix.errno</a></li>
<li><a href="../modules/posix.fcntl.html">posix.fcntl</a></li>
<li><a href="../modules/posix.fnmatch.html">posix.fnmatch</a></li>
<li><a href="../modules/posix.getopt.html">posix.getopt</a></li>
<li><a href="../modules/posix.glob.html">posix.glob</a></li>
<li><a href="../modules/posix.grp.html">posix.grp</a></li>
<li><a href="../modules/posix.libgen.html">posix.libgen</a></li>
<li><a href="../modules/posix.poll.html">posix.poll</a></li>
<li><a href="../modules/posix.pwd.html">posix.pwd</a></li>
<li><a href="../modules/posix.sched.html">posix.sched</a></li>
<li><a href="../modules/posix.signal.html">posix.signal</a></li>
<li><a href="../modules/posix.stdio.html">posix.stdio</a></li>
<li><a href="../modules/posix.stdlib.html">posix.stdlib</a></li>
<li><a href="../modules/posix.sys.msg.html">posix.sys.msg</a></li>
<li><a href="../modules/posix.sys.resource.html">posix.sys.resource</a></li>
<li><a href="../modules/posix.sys.socket.html">posix.sys.socket</a></li>
<li><a href="../modules/posix.sys.stat.html">posix.sys.stat</a></li>
<li><a href="../modules/posix.sys.statvfs.html">posix.sys.statvfs</a></li>
<li><a href="../modules/posix.sys.time.html">posix.sys.time</a></li>
<li><a href="../modules/posix.sys.times.html">posix.sys.times</a></li>
<li><a href="../modules/posix.sys.utsname.html">posix.sys.utsname</a></li>
<li><strong>posix.sys.wait</strong></li>
<li><a href="../modules/posix.syslog.html">posix.syslog</a></li>
<li><a href="../modules/posix.termio.html">posix.termio</a></li>
<li><a href="../modules/posix.time.html">posix.time</a></li>
<li><a href="../modules/posix.unistd.html">posix.unistd</a></li>
<li><a href="../modules/posix.utime.html">posix.utime</a></li>
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<h2>Classes</h2>
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<li><a href="../classes/posix.curses.chstr.html">posix.curses.chstr</a></li>
<li><a href="../classes/posix.curses.window.html">posix.curses.window</a></li>
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<h2>Examples</h2>
<ul class="$(kind=='Topics' and '' or 'nowrap'">
<li><a href="../examples/curses.lua.html">curses.lua</a></li>
<li><a href="../examples/dir.lua.html">dir.lua</a></li>
<li><a href="../examples/fork.lua.html">fork.lua</a></li>
<li><a href="../examples/fork2.lua.html">fork2.lua</a></li>
<li><a href="../examples/getopt.lua.html">getopt.lua</a></li>
<li><a href="../examples/glob.lua.html">glob.lua</a></li>
<li><a href="../examples/limit.lua.html">limit.lua</a></li>
<li><a href="../examples/lock.lua.html">lock.lua</a></li>
<li><a href="../examples/netlink-uevent.lua.html">netlink-uevent.lua</a></li>
<li><a href="../examples/ping.lua.html">ping.lua</a></li>
<li><a href="../examples/poll.lua.html">poll.lua</a></li>
<li><a href="../examples/rt_sched.lua.html">rt_sched.lua</a></li>
<li><a href="../examples/signal.lua.html">signal.lua</a></li>
<li><a href="../examples/socket.lua.html">socket.lua</a></li>
<li><a href="../examples/termios.lua.html">termios.lua</a></li>
<li><a href="../examples/tree.lua.html">tree.lua</a></li>
</ul>
</div>
<div id="content">
<h1>Module <code>posix.sys.wait</code></h1>
<p>Wait for Process Termination.</p>
<p>
</p>
<h2><a href="#Functions">Functions</a></h2>
<table class="function_list">
<tr>
<td class="name" nowrap><a href="#wait">wait ([pid=-1[, options]])</a></td>
<td class="summary">Wait for child process to terminate.</td>
</tr>
</table>
<h2><a href="#Constants">Constants </a></h2>
<table class="function_list">
<tr>
<td class="name" nowrap><a href="#posix.sys.wait">posix.sys.wait</a></td>
<td class="summary">Wait constants.</td>
</tr>
</table>
<br/>
<br/>
<h2><a name="Functions"></a>Functions</h2>
<dl class="function">
<dt>
<a name = "wait"></a>
<strong>wait ([pid=-1[, options]])</strong>
</dt>
<dd>
Wait for child process to terminate.
<h3>Parameters:</h3>
<ul>
<li><span class="parameter">pid</span>
<span class="types"><span class="type">int</span></span>
child process id to wait for, or -1 for any child process
(<em>default</em> -1)
</li>
<li><span class="parameter">options</span>
<span class="types"><span class="type">int</span></span>
bitwise OR of <code>WNOHANG</code> and <code>WUNTRACED</code>
(<em>optional</em>)
</li>
</ul>
<h3>Returns:</h3>
<ol>
<li>
<span class="types"><span class="type">int</span></span>
pid of terminated child, if successful</li>
<li>
<span class="types"><a class="type" href="http://www.lua.org/manual/5.1/manual.html#5.4">string</a></span>
"exited", "killed" or "stopped"</li>
<li>
<span class="types"><span class="type">int</span></span>
exit status, or signal number responsible for "killed" or "stopped"</li>
</ol>
<h3>Or</h3>
<ol>
<li>
nil</li>
<li>
<span class="types"><a class="type" href="http://www.lua.org/manual/5.1/manual.html#5.4">string</a></span>
error message</li>
<li>
<span class="types"><span class="type">int</span></span>
errnum</li>
</ol>
<h3>See also:</h3>
<ul>
<li><a href="http://pubs.opengroup.org/onlinepubs/009695399/functions/waitpid.html">waitpid(2)</a></li>
<li><a href="../modules/posix.unistd.html#fork">posix.unistd.fork</a></li>
</ul>
</dd>
</dl>
<h2><a name="Constants"></a>Constants </h2>
<dl class="function">
<dt>
<a name = "posix.sys.wait"></a>
<strong>posix.sys.wait</strong>
</dt>
<dd>
Wait constants.
Any constants not available in the underlying system will be <code>nil</code> valued.
<h3>Fields:</h3>
<ul>
<li><span class="parameter">WNOHANG</span>
<span class="types"><span class="type">int</span></span>
don't block waiting
</li>
<li><span class="parameter">WUNTRACED</span>
<span class="types"><span class="type">int</span></span>
report status of stopped children
</li>
</ul>
<h3>Usage:</h3>
<ul>
<pre class="example">
<span class="comment">-- Print wait constants supported on this host.
</span> <span class="keyword">for</span> name, value <span class="keyword">in</span> <span class="global">pairs</span> (<span class="global">require</span> <span class="string">"posix.sys.wait"</span>) <span class="keyword">do</span>
<span class="keyword">if</span> <span class="global">type</span> (value) == <span class="string">"number"</span> <span class="keyword">then</span>
<span class="global">print</span> (name, value)
<span class="keyword">end</span>
<span class="keyword">end</span></pre>
</ul>
</dd>
</dl>
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<i>generated by <a href="http://github.com/stevedonovan/LDoc">LDoc 1.4.3</a></i>
<i style="float:right;">Last updated 2015-03-01 09:06:02 </i>
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