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<h1>luaposix 33.3.0</h1>

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  <li><a href="../index.html">Index</a></li>
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<h2>Examples</h2>
<ul class="$(kind=='Topics' and '' or 'nowrap'">
  <li><a href="../examples/curses.lua.html">curses.lua</a></li>
  <li><a href="../examples/dir.lua.html">dir.lua</a></li>
  <li><a href="../examples/fork.lua.html">fork.lua</a></li>
  <li><a href="../examples/fork2.lua.html">fork2.lua</a></li>
  <li><a href="../examples/getopt.lua.html">getopt.lua</a></li>
  <li><a href="../examples/glob.lua.html">glob.lua</a></li>
  <li><a href="../examples/limit.lua.html">limit.lua</a></li>
  <li><a href="../examples/lock.lua.html">lock.lua</a></li>
  <li><a href="../examples/netlink-uevent.lua.html">netlink-uevent.lua</a></li>
  <li><a href="../examples/ping.lua.html">ping.lua</a></li>
  <li><a href="../examples/poll.lua.html">poll.lua</a></li>
  <li><a href="../examples/rt_sched.lua.html">rt_sched.lua</a></li>
  <li><a href="../examples/signal.lua.html">signal.lua</a></li>
  <li><a href="../examples/socket.lua.html">socket.lua</a></li>
  <li><strong>termios.lua</strong></li>
  <li><a href="../examples/tree.lua.html">tree.lua</a></li>
</ul>
<h2>Modules</h2>
<ul class="$(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>
</ul>

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<div id="content">

    <h2>termios.lua</h2>
<pre>
<span class="keyword">local</span> p = <span class="global">require</span> <span class="string">"posix"</span>
<span class="keyword">local</span> dev = arg[<span class="number">1</span>] <span class="keyword">or</span> <span class="string">"/dev/ttyUSB0"</span>

<span class="comment">-- Open serial port and do settings
</span>
<span class="keyword">local</span> fds, err = p.open(dev, p.O_RDWR + p.O_NONBLOCK);
<span class="keyword">if</span> <span class="keyword">not</span> fds <span class="keyword">then</span>
	<span class="global">print</span>(<span class="string">"Could not open serial port "</span> .. dev .. <span class="string">":"</span>, err)
	<span class="global">os</span>.exit(<span class="number">1</span>)
<span class="keyword">end</span>

p.tcsetattr(fds, <span class="number">0</span>, {
	cflag = p.B115200 + p.CS8 + p.CLOCAL + p.CREAD,
	iflag = p.IGNPAR,
	oflag = p.OPOST,
	cc = {
		[p.VTIME] = <span class="number">0</span>,
		[p.VMIN] = <span class="number">1</span>
	}
})

<span class="comment">-- Set stdin to non canonical mode. Save current settings
</span>
<span class="keyword">local</span> save = p.tcgetattr(<span class="number">0</span>)
p.tcsetattr(<span class="number">0</span>, <span class="number">0</span>, {
	cc = {
		[p.VTIME] = <span class="number">0</span>,
		[p.VMIN] = <span class="number">1</span>
	}
})

<span class="comment">-- Loop, reading and writing between ports. ^C stops
</span>
<span class="keyword">local</span> set = {
	[<span class="number">0</span>] = { events = { IN = <span class="keyword">true</span> } },
	[fds] = { events = { IN = <span class="keyword">true</span> } },
}

p.write(<span class="number">1</span>, <span class="string">"Starting terminal, hit ^C to exit\r\n"</span>)

<span class="keyword">local</span> <span class="keyword">function</span> exit(msg)
	p.tcsetattr(<span class="number">0</span>, <span class="number">0</span>, save)
	<span class="global">print</span>(<span class="string">"\n"</span>)
	<span class="global">print</span>(msg)
	<span class="global">os</span>.exit(<span class="number">0</span>)
<span class="keyword">end</span>

<span class="keyword">while</span> <span class="keyword">true</span> <span class="keyword">do</span>
	<span class="keyword">local</span> r = p.poll(set, -<span class="number">1</span>)
	<span class="keyword">for</span> fd, d <span class="keyword">in</span> <span class="global">pairs</span>(set) <span class="keyword">do</span>
		<span class="keyword">if</span> d.revents <span class="keyword">and</span> d.revents.IN <span class="keyword">then</span>
			<span class="keyword">if</span> fd == <span class="number">0</span> <span class="keyword">then</span>
				<span class="keyword">local</span> d, err = p.read(<span class="number">0</span>, <span class="number">1024</span>)
				<span class="keyword">if</span> <span class="keyword">not</span> d <span class="keyword">then</span> exit(err) <span class="keyword">end</span>
				<span class="keyword">if</span> d == <span class="global">string</span>.char(<span class="number">3</span>) <span class="keyword">then</span> exit(<span class="string">"Bye"</span>) <span class="keyword">end</span>
				<span class="keyword">local</span> ok, err = p.write(fds, d)
				<span class="keyword">if</span> <span class="keyword">not</span> ok <span class="keyword">then</span> exit(err) <span class="keyword">end</span>
			<span class="keyword">end</span>
			<span class="keyword">if</span> fd == fds <span class="keyword">then</span>
				<span class="keyword">local</span> d, err = p.read(fds, <span class="number">1024</span>)
				<span class="keyword">if</span> <span class="keyword">not</span> d <span class="keyword">then</span> exit(err) <span class="keyword">end</span>
				<span class="keyword">local</span> ok, err = p.write(<span class="number">1</span>, d)
				<span class="keyword">if</span> <span class="keyword">not</span> ok <span class="keyword">then</span> exit(err) <span class="keyword">end</span>
			<span class="keyword">end</span>
		<span class="keyword">end</span>
	<span class="keyword">end</span>
<span class="keyword">end</span></pre>


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