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<a name="mu-logger"></a>
<div class="header">
<p>
Next: <a href="mu-pop.html#mu-pop" accesskey="n" rel="next">mu pop</a>, Previous: <a href="mu-dbm.html#mu-dbm" accesskey="p" rel="prev">mu dbm</a>, Up: <a href="mu.html#mu" accesskey="u" rel="up">mu</a> &nbsp; [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Function-Index.html#Function-Index" title="Index" rel="index">Index</a>]</p>
</div>
<hr>
<a name="mu-logger-1"></a>
<h4 class="subsection">2.17.12 mu logger</h4>
<p>The <code>mu logger</code> tool logs information using Mailutils log facility.  
</p>
<p>Syntax:
</p>
<div class="example">
<pre class="example">mu logger [<var>options</var>] [<var>message</var>]
</pre></div>

<p>The <var>message</var> argument, if supplied, gives the text to log.  If not supplied, the utility reads lines of text from standard input or a file (if the <samp>--file</samp> option is given) and sends them to log:
</p>
<div class="example">
<pre class="example"># Send text to log
$ mu logger I am here
# Log each line from file.txt
$ mu logger --file file.txt
# Read stdin and log it:
$ mu logger
</pre></div>

<p>The default logging channel is bound to standard error.  To bind it to
syslog, use the <samp>--syslog</samp> command line option.  In that case
<code>mu</code> uses facility &lsquo;<samp>user</samp>&rsquo; and priority &lsquo;<samp>err</samp>&rsquo;.  You
can change this by using the <samp>--priority</samp> (<samp>-p</samp>) option.
Its argument is either a syslog facility name or facility and severity
names separated by a dot.  For example, the following invocation will use
facility &lsquo;<samp>auth</samp>&rsquo;, severity &lsquo;<samp>info</samp>&rsquo;: 
</p>
<div class="example">
<pre class="example">mu logger --priority auth.info
</pre></div>

<p>The syslog tag can be set using the <samp>--tag</samp> (<samp>-t</samp>) option:
</p>
<div class="example">
<pre class="example">mu logger --tag myprog
</pre></div>

<p>The default tag is &lsquo;<samp>mu-logger</samp>&rsquo;.
</p>
<p>The <samp>--severity</samp> (<samp>-s</samp>) option sets the Mailutils
severity level.  Its argument can be any of the following:
&lsquo;<samp>debug</samp>&rsquo;, &lsquo;<samp>info</samp>&rsquo;, &lsquo;<samp>notice</samp>&rsquo;, &lsquo;<samp>warning</samp>&rsquo;,
&lsquo;<samp>error</samp>&rsquo;, &lsquo;<samp>crit</samp>&rsquo;, &lsquo;<samp>alert</samp>&rsquo;, &lsquo;<samp>emerg</samp>&rsquo;. 
</p>
<p>Finally, the <samp>--locus</samp> (<samp>-l</samp>) option binds log messages
to a location in a file.  Its argument has the following syntax:
</p>
<div class="example">
<pre class="example"><var>file</var>:<var>line</var>[:<var>col</var>]
</pre></div>

<p>where <var>file</var> is the file name, <var>line</var> is the line number and
optional <var>col</var> is the column number in that file.
</p>
<p>For example, the following invocation:
</p>
<div class="example">
<pre class="example">mu logger --locus mailutils.rc:34 Suspicious statement
</pre></div>

<p>will send the following to the log:
</p>
<div class="example">
<pre class="example">mu-logger: mailutils.rc:34: Suspicious statement
</pre></div>

<hr>
<div class="header">
<p>
Next: <a href="mu-pop.html#mu-pop" accesskey="n" rel="next">mu pop</a>, Previous: <a href="mu-dbm.html#mu-dbm" accesskey="p" rel="prev">mu dbm</a>, Up: <a href="mu.html#mu" accesskey="u" rel="up">mu</a> &nbsp; [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Function-Index.html#Function-Index" title="Index" rel="index">Index</a>]</p>
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