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| author | Indrajith K L | 2022-12-03 17:00:20 +0530 |
|---|---|---|
| committer | Indrajith K L | 2022-12-03 17:00:20 +0530 |
| commit | f5c4671bfbad96bf346bd7e9a21fc4317b4959df (patch) | |
| tree | 2764fc62da58f2ba8da7ed341643fc359873142f /ctags/docs/interactive-mode.html | |
| download | cli-tools-windows-master.tar.gz cli-tools-windows-master.tar.bz2 cli-tools-windows-master.zip | |
Diffstat (limited to 'ctags/docs/interactive-mode.html')
| -rw-r--r-- | ctags/docs/interactive-mode.html | 185 |
1 files changed, 185 insertions, 0 deletions
diff --git a/ctags/docs/interactive-mode.html b/ctags/docs/interactive-mode.html new file mode 100644 index 0000000..c580295 --- /dev/null +++ b/ctags/docs/interactive-mode.html @@ -0,0 +1,185 @@ + +<!DOCTYPE html> + +<html> + <head> + <meta charset="utf-8" /> + <meta name="viewport" content="width=device-width, initial-scale=1.0" /><meta name="generator" content="Docutils 0.17.1: http://docutils.sourceforge.net/" /> + + <title>Interactive mode — Universal Ctags 0.3.0 documentation</title> + <link rel="stylesheet" type="text/css" href="_static/pygments.css" /> + <link rel="stylesheet" type="text/css" href="_static/classic.css" /> + + <script data-url_root="./" id="documentation_options" src="_static/documentation_options.js"></script> + <script src="_static/jquery.js"></script> + <script src="_static/underscore.js"></script> + <script src="_static/doctools.js"></script> + + <link rel="index" title="Index" href="genindex.html" /> + <link rel="search" title="Search" href="search.html" /> + <link rel="next" title="Other changes" href="news.html" /> + <link rel="prev" title="Running multiple parsers on an input file" href="running-multi-parsers.html" /> + </head><body> + <div class="related" role="navigation" aria-label="related navigation"> + <h3>Navigation</h3> + <ul> + <li class="right" style="margin-right: 10px"> + <a href="genindex.html" title="General Index" + accesskey="I">index</a></li> + <li class="right" > + <a href="news.html" title="Other changes" + accesskey="N">next</a> |</li> + <li class="right" > + <a href="running-multi-parsers.html" title="Running multiple parsers on an input file" + accesskey="P">previous</a> |</li> + <li class="nav-item nav-item-0"><a href="index.html">Universal Ctags 0.3.0 documentation</a> »</li> + <li class="nav-item nav-item-this"><a href="">Interactive mode</a></li> + </ul> + </div> + + <div class="document"> + <div class="documentwrapper"> + <div class="bodywrapper"> + <div class="body" role="main"> + + <section id="interactive-mode"> +<span id="id1"></span><h1>Interactive mode<a class="headerlink" href="#interactive-mode" title="Permalink to this headline">¶</a></h1> +<p>Universal Ctags can be run with <code class="docutils literal notranslate"><span class="pre">--_interactive</span></code>, which enters a REPL that +can be used programmatically to control ctags generation. In this mode, json +commands are received over stdin, and corresponding responses are emitted over +stdout.</p> +<p>This feature needs ctags to be built with json support and this requires libjansson to be installed +at build-time. If it’s supported it will be listed in the output of <code class="docutils literal notranslate"><span class="pre">--list-features</span></code>:</p> +<div class="highlight-console notranslate"><div class="highlight"><pre><span></span><span class="gp">$ </span>ctags --list-features <span class="p">|</span> grep json +<span class="go">json</span> +</pre></div> +</div> +<p>Communication with Universal Ctags over stdio uses the <a class="reference external" href="http://jsonlines.org/">json lines</a> format, where each +json object appears on a single line and is terminated with a newline.</p> +<p>When <code class="docutils literal notranslate"><span class="pre">ctags</span> <span class="pre">--_interactive</span></code> is invoked, it will emit a single json object to stdout announcing +its name and version. This signals the start of the interactive loop, and the user can begin sending +commands over stdin.</p> +<div class="highlight-console notranslate"><div class="highlight"><pre><span></span><span class="gp">$ </span>ctags --_interactive +<span class="go">{"_type": "program", "name": "Universal Ctags", "version": "0.0.0"}</span> +</pre></div> +</div> +<p>The following commands are currently supported in interactive mode:</p> +<ul class="simple"> +<li><p><a class="reference internal" href="#generate-tags">generate-tags</a></p></li> +</ul> +<section id="generate-tags"> +<h2>generate-tags<a class="headerlink" href="#generate-tags" title="Permalink to this headline">¶</a></h2> +<p>The <code class="docutils literal notranslate"><span class="pre">generate-tags</span></code> command takes two arguments:</p> +<ul class="simple"> +<li><p><code class="docutils literal notranslate"><span class="pre">filename</span></code>: name of the file to generate tags for (required)</p></li> +<li><p><code class="docutils literal notranslate"><span class="pre">size</span></code>: size in bytes of the file, if the contents will be received over stdin (optional)</p></li> +</ul> +<p>The simplest way to generate tags for a file is by passing its path on filesystem(<code class="docutils literal notranslate"><span class="pre">file</span> <span class="pre">request</span></code>). The response will include +one json object per line representing each tag, followed by a single json object with the <code class="docutils literal notranslate"><span class="pre">completed</span></code> +field emitted once the file has been fully processed.</p> +<div class="highlight-console notranslate"><div class="highlight"><pre><span></span><span class="gp">$ </span><span class="nb">echo</span> <span class="s1">'{"command":"generate-tags", "filename":"test.rb"}'</span> <span class="p">|</span> ctags --_interactive +<span class="go">{"_type": "program", "name": "Universal Ctags", "version": "0.0.0"}</span> +<span class="go">{"_type": "tag", "name": "foobar", "path": "test.rb", "pattern": "/^ def foobar$/", "kind": "method", "scope": "Test", "scopeKind": "class"}</span> +<span class="go">{"_type":"completed", "command": "generate-tags"}</span> +</pre></div> +</div> +<p>The <code class="docutils literal notranslate"><span class="pre">generate-tags</span></code> command can also be used to generate tags for code which is not present on filesystem(<code class="docutils literal notranslate"><span class="pre">inline</span> <span class="pre">request</span></code>). For example, +an IDE might want to generate ctags for an unsaved buffer while the user is editing code. When <code class="docutils literal notranslate"><span class="pre">size</span></code> is specified, +the corresponding number of bytes are read over stdin after the json object and newline.</p> +<div class="highlight-console notranslate"><div class="highlight"><pre><span></span><span class="gp">$ </span><span class="o">(</span> +<span class="go"> echo '{"command":"generate-tags", "filename":"test.rb", "size": 17}'</span> +<span class="go"> echo 'def foobaz() end'</span> +<span class="go">) | ctags --_interactive</span> +<span class="go">{"_type": "program", "name": "Universal Ctags", "version": "0.0.0"}</span> +<span class="go">{"_type": "tag", "name": "foobaz", "path": "test.rb", "pattern": "/^def foobaz() end$/", "kind": "method"}</span> +<span class="go">{"_type": "completed", "command": "generate-tags"}</span> +</pre></div> +</div> +</section> +<section id="sandbox-submode"> +<span id="id2"></span><h2>sandbox submode<a class="headerlink" href="#sandbox-submode" title="Permalink to this headline">¶</a></h2> +<p><code class="docutils literal notranslate"><span class="pre">sandbox</span></code> submode can be used with <code class="docutils literal notranslate"><span class="pre">--_interactive=sandbox</span></code>. This +submode will activate a sandbox, to this limits the damage that the +can be achieved when exploiting a buffer overflow in Universal Ctags.</p> +<p>In the sandbox submode ctags can generate tags only for inline +requests because ctags has to use open system call to handle file +requests. The open system call is not allowed in the sandbox.</p> +<p>This feature uses <a class="reference external" href="https://www.kernel.org/doc/html/latest/userspace-api/seccomp_filter.html">Seccomp BPF (SECure COMPuting with filters)</a>, +and is only supported on Linux. To use the sandbox submode <a class="reference external" href="https://github.com/seccomp/libseccomp">libseccomp</a> is needed at build-time. If ctags was +built with seccomp support, <code class="docutils literal notranslate"><span class="pre">sandbox</span></code> is listed in the output of +<code class="docutils literal notranslate"><span class="pre">--list-features</span></code> option.</p> +<div class="highlight-console notranslate"><div class="highlight"><pre><span></span><span class="gp">$ </span>ctags --list-features <span class="p">|</span> grep sandbox +<span class="go">sandbox</span> +</pre></div> +</div> +<div class="highlight-console notranslate"><div class="highlight"><pre><span></span><span class="gp">$ </span><span class="o">(</span> +<span class="go"> echo '{"command":"generate-tags", "filename":"test.rb", "size": 17}'</span> +<span class="go"> echo 'def foobaz() end'</span> +<span class="go">) | ctags --_interactive=sandbox</span> +<span class="go">{"_type": "program", "name": "Universal Ctags", "version": "0.0.0"}</span> +<span class="go">{"_type": "tag", "name": "foobaz", "path": "test.rb", "pattern": "/^def foobaz() end$/", "kind": "method"}</span> +<span class="go">{"_type": "completed", "command": "generate-tags"}</span> +</pre></div> +</div> +</section> +</section> + + + <div class="clearer"></div> + </div> + </div> + </div> + <div class="sphinxsidebar" role="navigation" aria-label="main navigation"> + <div class="sphinxsidebarwrapper"> + <h3><a href="index.html">Table of Contents</a></h3> + <ul> +<li><a class="reference internal" href="#">Interactive mode</a><ul> +<li><a class="reference internal" href="#generate-tags">generate-tags</a></li> +<li><a class="reference internal" href="#sandbox-submode">sandbox submode</a></li> +</ul> +</li> +</ul> + + <h4>Previous topic</h4> + <p class="topless"><a href="running-multi-parsers.html" + title="previous chapter">Running multiple parsers on an input file</a></p> + <h4>Next topic</h4> + <p class="topless"><a href="news.html" + title="next chapter">Other changes</a></p> +<div id="searchbox" style="display: none" role="search"> + <h3 id="searchlabel">Quick search</h3> + <div class="searchformwrapper"> + <form class="search" action="search.html" method="get"> + <input type="text" name="q" aria-labelledby="searchlabel" /> + <input type="submit" value="Go" /> + </form> + </div> +</div> +<script>$('#searchbox').show(0);</script> + </div> + </div> + <div class="clearer"></div> + </div> + <div class="related" role="navigation" aria-label="related navigation"> + <h3>Navigation</h3> + <ul> + <li class="right" style="margin-right: 10px"> + <a href="genindex.html" title="General Index" + >index</a></li> + <li class="right" > + <a href="news.html" title="Other changes" + >next</a> |</li> + <li class="right" > + <a href="running-multi-parsers.html" title="Running multiple parsers on an input file" + >previous</a> |</li> + <li class="nav-item nav-item-0"><a href="index.html">Universal Ctags 0.3.0 documentation</a> »</li> + <li class="nav-item nav-item-this"><a href="">Interactive mode</a></li> + </ul> + </div> + <div class="footer" role="contentinfo"> + © Copyright 2015, Universal Ctags Team. + Last updated on 11 Jun 2021. + Created using <a href="https://www.sphinx-doc.org/">Sphinx</a> 4.0.2. + </div> + </body> +</html>
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