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<title>lseek (Debugging with GDB)</title>

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<h4 class="unnumberedsubsubsec">lseek</h4>
<a name="index-lseek_002c-file_002di_002fo-system-call"></a>

<dl compact="compact">
<dt>Synopsis:</dt>
<dd><div class="smallexample">
<pre class="smallexample">long lseek (int fd, long offset, int flag);
</pre></div>

</dd>
<dt>Request:</dt>
<dd><p>&lsquo;<samp>Flseek,<var>fd</var>,<var>offset</var>,<var>flag</var></samp>&rsquo;
</p>
<p><var>flag</var> is one of:
</p>
<dl compact="compact">
<dt><code>SEEK_SET</code></dt>
<dd><p>The offset is set to <var>offset</var> bytes.
</p>
</dd>
<dt><code>SEEK_CUR</code></dt>
<dd><p>The offset is set to its current location plus <var>offset</var>
bytes.
</p>
</dd>
<dt><code>SEEK_END</code></dt>
<dd><p>The offset is set to the size of the file plus <var>offset</var>
bytes.
</p></dd>
</dl>

</dd>
<dt>Return value:</dt>
<dd><p>On success, the resulting unsigned offset in bytes from
the beginning of the file is returned.  Otherwise, a
value of -1 is returned.
</p>
</dd>
<dt>Errors:</dt>
<dd>
<dl compact="compact">
<dt><code>EBADF</code></dt>
<dd><p><var>fd</var> is not a valid open file descriptor.
</p>
</dd>
<dt><code>ESPIPE</code></dt>
<dd><p><var>fd</var> is associated with the <small>GDB</small> console.
</p>
</dd>
<dt><code>EINVAL</code></dt>
<dd><p><var>flag</var> is not a proper value.
</p>
</dd>
<dt><code>EINTR</code></dt>
<dd><p>The call was interrupted by the user.
</p></dd>
</dl>

</dd>
</dl>


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