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240 lines
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<title>bunyan(1) - filter and pretty-print Bunyan log file content</title>
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<a href="#NAME">NAME</a>
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<a href="#SYNOPSIS">SYNOPSIS</a>
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<a href="#DESCRIPTION">DESCRIPTION</a>
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<a href="#OPTIONS">OPTIONS</a>
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<a href="#LOG-LEVELS">LOG LEVELS</a>
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<a href="#OUTPUT-FORMATS">OUTPUT FORMATS</a>
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<a href="#DTRACE-SUPPORT">DTRACE SUPPORT</a>
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<a href="#ENVIRONMENT">ENVIRONMENT</a>
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<a href="#PROJECT-BUGS">PROJECT & BUGS</a>
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<a href="#COPYRIGHT">COPYRIGHT</a>
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<li class='tl'>bunyan(1)</li>
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<li class='tc'>bunyan manual</li>
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<li class='tr'>bunyan(1)</li>
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</ol>
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<h2 id="NAME">NAME</h2>
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<p class="man-name">
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<code>bunyan</code> - <span class="man-whatis">filter and pretty-print Bunyan log file content</span>
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</p>
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<h2 id="SYNOPSIS">SYNOPSIS</h2>
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<p><code>bunyan</code> [OPTIONS]</p>
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<p>... | <code>bunyan</code> [OPTIONS]</p>
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<h2 id="DESCRIPTION">DESCRIPTION</h2>
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<p>"Bunyan" is <strong>a simple and fast a JSON logging library</strong> for node.js services,
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a one-JSON-object-per-line log format, and <strong>a <code>bunyan</code> CLI tool</strong> for nicely
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viewing those logs. This man page describes the latter.</p>
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<h3 id="Pretty-printing">Pretty-printing</h3>
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<p>A bunyan log file is a stream of JSON objects, optionally interspersed with
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non-JSON log lines. The primary usage of <a href="bunyan.1.html" class="man-ref">bunyan<span class="s">(1)</span></a> is to pretty print,
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for example:</p>
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<pre><code>$ bunyan foo.log # or `cat foo.log | bunyan
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[2012-02-08T22:56:52.856Z] INFO: myservice/123 on example.com: My message
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extra: multi
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line
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[2012-02-08T22:56:54.856Z] ERROR: myservice/123 on example.com: My message
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...
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</code></pre>
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<p>By default the "long" output format is used. Use the <code>-o FORMAT</code> option to
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emit other formats. E.g.:</p>
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<pre><code>$ bunyan foo.log -o short
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22:56:52.856Z INFO myservice: My message
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extra: multi
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line
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22:56:54.856Z ERROR myservice: My message
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...
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</code></pre>
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<p>These will color the output if supported in your terminal.
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See "OUTPUT FORMATS" below.</p>
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<h3 id="Filtering">Filtering</h3>
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<p>The <code>bunyan</code> CLI can also be used to filter a bunyan log. Use <code>-l LEVEL</code>
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to filter by level:</p>
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<pre><code>$ bunyan foo.log -l error # show only 'error' level records
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[2012-02-08T22:56:54.856Z] ERROR: myservice/123 on example.com: My message
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</code></pre>
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<p>Use <code>-c COND</code> to filter on a JavaScript expression returning true on the
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record data. In the COND code, <code>this</code> refers to the record object:</p>
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<pre><code>$ bunyan foo.log -c `this.three` # show records with the 'extra' field
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[2012-02-08T22:56:52.856Z] INFO: myservice/123 on example.com: My message
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extra: multi
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line
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</code></pre>
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<h2 id="OPTIONS">OPTIONS</h2>
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<dl>
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<dt><code>-h</code>, <code>--help</code></dt><dd><p>Print this help info and exit.</p></dd>
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<dt><code>--version</code></dt><dd><p>Print version of this command and exit.</p></dd>
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<dt><code>-q</code>, <code>--quiet</code></dt><dd><p>Don't warn if input isn't valid JSON.</p></dd>
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</dl>
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<p>Filtering options:</p>
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<dl>
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<dt><code>-l</code>, <code>--level LEVEL</code></dt><dd><p>Only show messages at or above the specified level. You can specify level
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<em>names</em> or numeric values. (See 'Log Levels' below.)</p></dd>
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<dt><code>-c COND</code>, <code>--condition COND</code></dt><dd><p>Run each log message through the condition and only show those that
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resolve to a truish value. E.g. <code>-c 'this.pid == 123'</code>.</p></dd>
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<dt><code>--strict</code></dt><dd><p>Suppress all but legal Bunyan JSON log lines. By default non-JSON, and
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non-Bunyan lines are passed through.</p></dd>
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</dl>
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<p>Output options:</p>
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<dl>
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<dt class="flush"><code>--color</code></dt><dd><p>Colorize output. Defaults to try if output stream is a TTY.</p></dd>
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<dt><code>--no-color</code></dt><dd><p>Force no coloring (e.g. terminal doesn't support it)</p></dd>
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<dt><code>-o FORMAT</code>, <code>--output FORMAT</code></dt><dd><p>Specify an output format. One of <code>long</code> (the default), <code>short</code>, <code>json</code>,
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<code>json-N</code>, <code>bunyan</code> (the native bunyan 0-indent JSON output) or <code>inspect</code>.</p></dd>
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<dt class="flush"><code>-j</code></dt><dd><p>Shortcut for <code>-o json</code>.</p></dd>
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</dl>
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<h2 id="LOG-LEVELS">LOG LEVELS</h2>
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<p>In Bunyan log records, then <code>level</code> field is a number. For the <code>-l|--level</code>
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argument the level <strong>names</strong> are supported as shortcuts. In <code>-c|--condition</code>
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scripts, uppercase symbols like "DEBUG" are defined for convenience.</p>
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<pre><code>Level Name Level Number Symbol in COND Scripts
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trace 10 TRACE
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debug 20 DEBUG
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info 30 INFO
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warn 40 WARN
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error 50 ERROR
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fatal 60 FATAL
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</code></pre>
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<h2 id="OUTPUT-FORMATS">OUTPUT FORMATS</h2>
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<pre><code>FORMAT NAME DESCRIPTION
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long (default) The default output. Long form. Colored and "pretty".
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'req' and 'res' and 'err' fields are rendered specially
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as an HTTP request, HTTP response and exception
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stack trace, respectively. For backward compat, the
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name "paul" also works for this.
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short Like the default output, but more concise. Some
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typically redundant fields are ellided.
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json JSON output, 2-space indentation.
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json-N JSON output, N-space indentation, e.g. "json-4"
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bunyan Alias for "json-0", the Bunyan "native" format.
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inspect Node.js `util.inspect` output.
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</code></pre>
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<h2 id="PROJECT-BUGS">PROJECT & BUGS</h2>
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<p><code>bunyan</code> is written in JavaScript and requires node.js (<code>node</code>). The project
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lives at <a href="https://github.com/trentm/node-bunyan" data-bare-link="true">https://github.com/trentm/node-bunyan</a> and is published to npm as
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"bunyan".</p>
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<ul>
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<li>README, Install notes: <a href="https://github.com/trentm/node-bunyan#readme" data-bare-link="true">https://github.com/trentm/node-bunyan#readme</a></li>
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<li>Report bugs to <a href="https://github.com/trentm/node-bunyan/issues" data-bare-link="true">https://github.com/trentm/node-bunyan/issues</a>.</li>
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<li>See the full changelog at: <a href="https://github.com/trentm/node-bunyan/blob/master/CHANGES.md" data-bare-link="true">https://github.com/trentm/node-bunyan/blob/master/CHANGES.md</a></li>
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</ul>
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<h2 id="LICENSE">LICENSE</h2>
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<p>MIT License (see <a href="https://github.com/trentm/node-bunyan/blob/master/LICENSE.txt" data-bare-link="true">https://github.com/trentm/node-bunyan/blob/master/LICENSE.txt</a>)</p>
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<h2 id="COPYRIGHT">COPYRIGHT</h2>
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<p>node-bunyan is Copyright (c) 2012 Joyent, Inc. Copyright (c) 2012 Trent Mick.
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All rights reserved.</p>
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<ol class='man-decor man-foot man foot'>
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<li class='tl'></li>
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<li class='tc'>January 2015</li>
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<li class='tr'>bunyan(1)</li>
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</ol>
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</div>
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<a href="https://github.com/trentm/node-bunyan"><img style="position: absolute; top: 0; right: 0; border: 0;" src="https://s3.amazonaws.com/github/ribbons/forkme_right_darkblue_121621.png" alt="Fork me on GitHub"></a></body>
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