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<h1>luaposix 36.3</h1>
<ul>
<li><a href="../index.html">Index</a></li>
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<h2>Examples</h2>
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<li><a href="../examples/abstract-ns-client.lua.html">abstract-ns-client.lua</a></li>
<li><a href="../examples/abstract-ns-server.lua.html">abstract-ns-server.lua</a></li>
<li><a href="../examples/dir.lua.html">dir.lua</a></li>
<li><a href="../examples/dup2.lua.html">dup2.lua</a></li>
<li><a href="../examples/fork.lua.html">fork.lua</a></li>
<li><strong>fork2.lua</strong></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/packet-socket.lua.html">packet-socket.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>
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<h2>Modules</h2>
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<h2>fork2.lua</h2>
<pre>
#! /usr/bin/env lua
<span class="keyword">local</span> M = <span class="global">require</span> <span class="string">'posix.unistd'</span>
<span class="global">print</span> (<span class="string">'parent: my pid is: '</span> .. M.<span class="function-name">getpid</span>())
<span class="keyword">local</span> childpid, errmsg = M.<span class="function-name">fork</span> ()
<span class="keyword">if</span> childpid == <span class="keyword">nil</span> <span class="keyword">then</span>
<span class="global">print</span>(<span class="string">'parent: The fork failed: '</span> .. errmsg)
<span class="keyword">elseif</span> childpid == <span class="number">0</span> <span class="keyword">then</span>
<span class="global">print</span>(<span class="string">'child: Hello World! I am pid: '</span> .. M.<span class="function-name">getpid</span>())
<span class="global">print</span>(<span class="string">"child: I'll sleep for 1 second ... "</span>)
M.<span class="function-name">sleep</span>(<span class="number">1</span>)
<span class="global">print</span>(<span class="string">'child: Good bye'</span>);
<span class="keyword">else</span>
<span class="global">print</span>(<span class="string">"parent: While the child sleeps, I'm still running."</span>)
<span class="global">print</span>(<span class="string">'parent: waiting for child (pid:'</span> .. childpid .. <span class="string">') to die...'</span>)
<span class="global">require</span> <span class="string">'posix.sys.wait'</span>.<span class="function-name">wait</span>(childpid)
<span class="global">print</span>(<span class="string">"parent: child died, but I'm still alive."</span>)
<span class="global">print</span>(<span class="string">'parent: Good bye'</span>)
<span class="keyword">end</span></pre>
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