toolchain/share/doc/gdb/Logging-Output.html

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<h3 class="section">2.4 Logging Output</h3>
<p><a name="index-logging-_0040value_007bGDBN_007d-output-72"></a><a name="index-save-_0040value_007bGDBN_007d-output-to-a-file-73"></a>
You may want to save the output of <span class="sc">gdb</span> commands to a file.
There are several commands to control <span class="sc">gdb</span>'s logging.
<a name="index-set-logging-74"></a>
<dl><dt><code>set logging on</code><dd>Enable logging.
<br><dt><code>set logging off</code><dd>Disable logging.
<a name="index-logging-file-name-75"></a><br><dt><code>set logging file </code><var>file</var><dd>Change the name of the current logfile. The default logfile is <samp><span class="file">gdb.txt</span></samp>.
<br><dt><code>set logging overwrite [on|off]</code><dd>By default, <span class="sc">gdb</span> will append to the logfile. Set <code>overwrite</code> if
you want <code>set logging on</code> to overwrite the logfile instead.
<br><dt><code>set logging redirect [on|off]</code><dd>By default, <span class="sc">gdb</span> output will go to both the terminal and the logfile.
Set <code>redirect</code> if you want output to go only to the log file.
<a name="index-show-logging-76"></a><br><dt><code>show logging</code><dd>Show the current values of the logging settings.
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