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<center><font size="2">The Open Group Base Specifications Issue 6<br>
IEEE Std 1003.1-2001<br>
Copyright &copy; 2001 The IEEE and The Open Group, All Rights reserved.</font></center>
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<h4><a name="tag_03_693_01"></a>NAME</h4>
<blockquote>sigpending - examine pending signals</blockquote>
<h4><a name="tag_03_693_02"></a>SYNOPSIS</h4>
<blockquote class="synopsis">
<div class="box"><code><tt><sup>[<a href="javascript:open_code('CX')">CX</a>]</sup> <img src="../images/opt-start.gif" alt=
"[Option Start]" border="0"> #include &lt;<a href="../basedefs/signal.h.html">signal.h</a>&gt;<br>
<br>
int sigpending(sigset_t *</tt><i>set</i><tt>); <img src="../images/opt-end.gif" alt="[Option End]" border="0"></tt></code></div>
<tt><br>
</tt></blockquote>
<h4><a name="tag_03_693_03"></a>DESCRIPTION</h4>
<blockquote>
<p>The <i>sigpending</i>() function shall store, in the location referenced by the <i>set</i> argument, the set of signals that are
blocked from delivery to the calling thread and that are pending on the process or the calling thread.</p>
</blockquote>
<h4><a name="tag_03_693_04"></a>RETURN VALUE</h4>
<blockquote>
<p>Upon successful completion, <i>sigpending</i>() shall return 0; otherwise, -1 shall be returned and <i>errno</i> set to indicate
the error.</p>
</blockquote>
<h4><a name="tag_03_693_05"></a>ERRORS</h4>
<blockquote>
<p>No errors are defined.</p>
</blockquote>
<hr>
<div class="box"><em>The following sections are informative.</em></div>
<h4><a name="tag_03_693_06"></a>EXAMPLES</h4>
<blockquote>
<p>None.</p>
</blockquote>
<h4><a name="tag_03_693_07"></a>APPLICATION USAGE</h4>
<blockquote>
<p>None.</p>
</blockquote>
<h4><a name="tag_03_693_08"></a>RATIONALE</h4>
<blockquote>
<p>None.</p>
</blockquote>
<h4><a name="tag_03_693_09"></a>FUTURE DIRECTIONS</h4>
<blockquote>
<p>None.</p>
</blockquote>
<h4><a name="tag_03_693_10"></a>SEE ALSO</h4>
<blockquote>
<p><a href="sigaddset.html"><i>sigaddset</i>()</a> , <a href="sigdelset.html"><i>sigdelset</i>()</a> , <a href=
"sigemptyset.html"><i>sigemptyset</i>()</a> , <a href="sigfillset.html"><i>sigfillset</i>()</a> , <a href=
"sigismember.html"><i>sigismember</i>()</a> , <a href="sigprocmask.html"><i>sigprocmask</i>()</a> , the Base Definitions volume of
IEEE&nbsp;Std&nbsp;1003.1-2001, <a href="../basedefs/signal.h.html"><i>&lt;signal.h&gt;</i></a></p>
</blockquote>
<h4><a name="tag_03_693_11"></a>CHANGE HISTORY</h4>
<blockquote>
<p>First released in Issue 3.</p>
</blockquote>
<h4><a name="tag_03_693_12"></a>Issue 5</h4>
<blockquote>
<p>The DESCRIPTION is updated for alignment with the POSIX Threads Extension.</p>
</blockquote>
<h4><a name="tag_03_693_13"></a>Issue 6</h4>
<blockquote>
<p>The SYNOPSIS is marked CX since the presence of this function in the <a href=
"../basedefs/signal.h.html"><i>&lt;signal.h&gt;</i></a> header is an extension over the ISO&nbsp;C standard.</p>
</blockquote>
<div class="box"><em>End of informative text.</em></div>
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