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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>
<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><strong>getopt.lua</strong></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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<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>
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<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>getopt.lua</h2>
<pre>
#! /usr/bin/env lua
<span class="keyword">local</span> getopt = <span class="global">require</span> <span class="string">'posix.unistd'</span>.getopt
<span class="keyword">local</span> last_index = <span class="number">1</span>
<span class="keyword">for</span> r, optarg, optind <span class="keyword">in</span> <span class="function-name">getopt</span>(arg, <span class="string">'ha:s:'</span>) <span class="keyword">do</span>
<span class="keyword">if</span> r == <span class="string">'?'</span> <span class="keyword">then</span>
<span class="keyword">return</span> <span class="global">print</span>(<span class="string">'unrecognized option'</span>, arg[optind -<span class="number">1</span>])
<span class="keyword">end</span>
last_index = optind
<span class="keyword">if</span> r == <span class="string">'h'</span> <span class="keyword">then</span>
<span class="global">print</span> <span class="string">'-h print this help text'</span>
<span class="global">print</span> <span class="string">'-a ARG a flag with required argument'</span>
<span class="global">print</span> <span class="string">'-s ARG a different flag with a required argument'</span>
<span class="keyword">elseif</span> r == <span class="string">'a'</span> <span class="keyword">or</span> r == <span class="string">'s'</span> <span class="keyword">then</span>
<span class="global">print</span>(<span class="string">'we were passed'</span>, r, optarg)
<span class="keyword">end</span>
<span class="keyword">end</span>
<span class="keyword">for</span> i = last_index, #arg <span class="keyword">do</span>
<span class="global">print</span>(i, arg[i])
<span class="keyword">end</span></pre>
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