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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
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<title>luaposix 36.3 Reference</title>
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<h1>luaposix 36.3</h1>
<ul>
<li><a href="../index.html">Index</a></li>
</ul>
<h2>Examples</h2>
<ul class="nowrap">
<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><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/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><strong>termios.lua</strong></li>
<li><a href="../examples/tree.lua.html">tree.lua</a></li>
</ul>
<h2>Modules</h2>
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<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.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.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>
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<div id="content">
<h2>termios.lua</h2>
<pre>
#! /usr/bin/env lua
<span class="keyword">local</span> M = <span class="global">require</span> <span class="string">'posix.termio'</span>
<span class="keyword">local</span> F = <span class="global">require</span> <span class="string">'posix.fcntl'</span>
<span class="keyword">local</span> U = <span class="global">require</span> <span class="string">'posix.unistd'</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 = F.<span class="function-name">open</span>(dev, F.O_RDWR + F.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>.<span class="function-name">exit</span>(<span class="number">1</span>)
<span class="keyword">end</span>
M.<span class="function-name">tcsetattr</span>(fds, <span class="number">0</span>, {
cflag = M.B115200 + M.CS8 + M.CLOCAL + M.CREAD,
iflag = M.IGNPAR,
oflag = M.OPOST,
cc = {
[M.VTIME] = <span class="number">0</span>,
[M.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 = M.<span class="function-name">tcgetattr</span>(<span class="number">0</span>)
M.<span class="function-name">tcsetattr</span>(<span class="number">0</span>, <span class="number">0</span>, {
cc = {
[M.VTIME] = <span class="number">0</span>,
[M.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>}},
}
U.<span class="function-name">write</span>(<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> <span class="function-name">exit</span>(msg)
M.<span class="function-name">tcsetattr</span>(<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>.<span class="function-name">exit</span>(<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 = <span class="global">require</span> <span class="string">'posix.poll'</span>.<span class="function-name">poll</span>(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 = U.<span class="function-name">read</span>(<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>
<span class="function-name">exit</span>(err)
<span class="keyword">end</span>
<span class="keyword">if</span> d == <span class="global">string</span>.<span class="function-name">char</span>(<span class="number">3</span>) <span class="keyword">then</span>
<span class="function-name">exit</span>(<span class="string">'Bye'</span>)
<span class="keyword">end</span>
<span class="keyword">local</span> ok, err = U.<span class="function-name">write</span>(fds, d)
<span class="keyword">if</span> <span class="keyword">not</span> ok <span class="keyword">then</span>
<span class="function-name">exit</span>(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 = U.<span class="function-name">read</span>(fds, <span class="number">1024</span>)
<span class="keyword">if</span> <span class="keyword">not</span> d <span class="keyword">then</span>
<span class="function-name">exit</span>(err)
<span class="keyword">end</span>
<span class="keyword">local</span> ok, err = U.<span class="function-name">write</span>(<span class="number">1</span>, d)
<span class="keyword">if</span> <span class="keyword">not</span> ok <span class="keyword">then</span>
<span class="function-name">exit</span>(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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