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<h1>luaposix 33.3.0</h1>
<ul>
<li><a href="../index.html">Index</a></li>
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<h2>Examples</h2>
<ul class="$(kind=='Topics' and '' or 'nowrap'">
<li><a href="../examples/curses.lua.html">curses.lua</a></li>
<li><a href="../examples/dir.lua.html">dir.lua</a></li>
<li><a href="../examples/fork.lua.html">fork.lua</a></li>
<li><a href="../examples/fork2.lua.html">fork2.lua</a></li>
<li><a href="../examples/getopt.lua.html">getopt.lua</a></li>
<li><a href="../examples/glob.lua.html">glob.lua</a></li>
<li><a href="../examples/limit.lua.html">limit.lua</a></li>
<li><a href="../examples/lock.lua.html">lock.lua</a></li>
<li><a href="../examples/netlink-uevent.lua.html">netlink-uevent.lua</a></li>
<li><a href="../examples/ping.lua.html">ping.lua</a></li>
<li><a href="../examples/poll.lua.html">poll.lua</a></li>
<li><a href="../examples/rt_sched.lua.html">rt_sched.lua</a></li>
<li><strong>signal.lua</strong></li>
<li><a href="../examples/socket.lua.html">socket.lua</a></li>
<li><a href="../examples/termios.lua.html">termios.lua</a></li>
<li><a href="../examples/tree.lua.html">tree.lua</a></li>
</ul>
<h2>Modules</h2>
<ul class="$(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><a href="../modules/posix.sys.wait.html">posix.sys.wait</a></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>
</ul>
<h2>Classes</h2>
<ul class="$(kind=='Topics' and '' or 'nowrap'">
<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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<div id="content">
<h2>signal.lua</h2>
<pre>
<span class="keyword">local</span> sig = <span class="global">require</span> <span class="string">"posix.signal"</span>
<span class="keyword">local</span> unistd = <span class="global">require</span> <span class="string">"posix.unistd"</span>
<span class="keyword">local</span> syswait = <span class="global">require</span> <span class="string">"posix.sys.wait"</span>
<span class="keyword">local</span> <span class="keyword">function</span> go (fn, ...)
<span class="keyword">local</span> cpid = unistd.fork ()
<span class="keyword">if</span> cpid == <span class="number">0</span> <span class="keyword">then</span> <span class="comment">-- run function as child
</span> unistd._exit (fn (...) <span class="keyword">or</span> <span class="number">0</span>)
<span class="keyword">else</span>
<span class="keyword">return</span> cpid
<span class="keyword">end</span>
<span class="keyword">end</span>
<span class="keyword">local</span> verbose = #arg > <span class="number">0</span>
<span class="keyword">local</span> <span class="keyword">function</span> sleepx (secs)
<span class="keyword">while</span> <span class="keyword">true</span> <span class="keyword">do</span>
secs = unistd.sleep (secs)
<span class="keyword">if</span> verbose <span class="keyword">then</span> <span class="global">print</span> (<span class="string">"sleep"</span>, secs) <span class="keyword">end</span>
<span class="keyword">if</span> secs == <span class="number">0</span> <span class="keyword">then</span> <span class="keyword">return</span> <span class="keyword">end</span>
<span class="keyword">end</span>
<span class="keyword">end</span>
<span class="keyword">local</span> nchild, nsig = <span class="number">0</span>, <span class="number">0</span>
sig.signal (sig.SIGCHLD, <span class="keyword">function</span>()
<span class="keyword">local</span> pid, status, code = syswait.wait (-<span class="number">1</span>, syswait.WNOHANG)
<span class="keyword">while</span> pid <span class="keyword">do</span>
<span class="keyword">if</span> pid ~= <span class="number">0</span> <span class="keyword">then</span>
<span class="keyword">if</span> verbose <span class="keyword">then</span> <span class="global">print</span> (<span class="string">"wait"</span>, pid, status, code) <span class="keyword">end</span>
nchild = nchild + <span class="number">1</span>
<span class="keyword">end</span>
pid, status, code = syswait.wait (-<span class="number">1</span>, syswait.WNOHANG)
<span class="keyword">end</span>
<span class="keyword">end</span>)
<span class="keyword">local</span> <span class="keyword">function</span> handler (signo)
<span class="keyword">if</span> verbose <span class="keyword">then</span> <span class="global">print</span> (<span class="string">"handled"</span>, signo) <span class="keyword">end</span>
nsig = nsig + <span class="number">1</span>
<span class="keyword">end</span>
sig.signal (sig.SIGUSR1, handler)
sig.signal (sig.SIGUSR2, handler)
sig.signal (<span class="number">60</span>, handler)
<span class="keyword">local</span> <span class="keyword">function</span> killp (nsig)
<span class="keyword">return</span> sig.kill (unistd.getppid (), nsig)
<span class="keyword">end</span>
c1 = go (<span class="keyword">function</span>() unistd.sleep (<span class="number">1</span>); killp (sig.SIGUSR1); killp (sig.SIGUSR2) <span class="keyword">end</span>)
c2 = go (<span class="keyword">function</span>() unistd.sleep (<span class="number">2</span>); killp (sig.SIGUSR2); <span class="keyword">end</span>)
c3 = go (<span class="keyword">function</span>() unistd.sleep (<span class="number">2</span>); killp (sig.SIGUSR1) <span class="keyword">end</span>)
sleepx(<span class="number">3</span>)
<span class="keyword">if</span> verbose <span class="keyword">then</span>
<span class="global">print</span> (<span class="string">"children"</span>, nchild, <span class="string">"signals"</span>, nsig)
<span class="keyword">else</span>
<span class="global">assert</span> (nchild == <span class="number">3</span>)
<span class="global">assert</span> (nsig == <span class="number">4</span>)
<span class="global">print</span> <span class="string">'+++ tests OK +++'</span>
<span class="keyword">end</span></pre>
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<i style="float:right;">Last updated 2015-03-01 09:06:02 </i>
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