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   <div id="projectname">tpm2-tss
   &#160;<span id="projectnumber">3.2.0</span>
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   <div id="projectbrief">TPM Software stack 2.0 TCG spec compliant implementation</div>
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<div class="title">Compile time log levels </div>  </div>
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<div class="textblock"><p>At compile time the maximum log level can be specified. This allows distros to disable the overhead code and reduce overall code size.</p>
<h1>Runtime log level</h1>
<p>At runtime, the log level is determined by an environment variable. The default log level is WARNING. The level can be changed by setting the <code>TSS2_LOG</code> environment variable.</p>
<p>Possible levels are: NONE, ERROR, WARNING, INFO, DEBUG, TRACE</p>
<p>The level can be set for all module using the <code>all</code> module name or individually per module. The environment variable is evaluated left to right.</p>
<p>Example: <code>TSS2_LOG=all+ERROR,marshal+TRACE,tcti+DEBUG</code></p>
<h1>Log file</h1>
<p>By default, logs are written to standard error (<code>stderr</code>). If the environment variable <code>TSS2_LOGFILE</code> is set, the TSS will log to the file at the given path instead. If the file does not yet exist, it will be created. Otherwise, the TSS will append to it.</p>
<p>The special value <code>stderr</code> will result in default behavior while <code>stdout</code> and <code>-</code> will have the TSS write to standard output.</p>
<h1>Implementation</h1>
<p>Each source code file specifies its corresponding module before including log.h. </p><div class="fragment"><div class="line">#define LOGMODULE tcti</div><div class="line">#include &quot;log.h&quot;</div></div><!-- fragment --><p> Optionally, the default log-level for this module can be set: </p><div class="fragment"><div class="line">#define LOGMODULE tcti</div><div class="line">#define LOGDEFAULT ERROR</div><div class="line">#include &quot;log.h&quot;</div></div><!-- fragment --> </div></div><!-- contents -->
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