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<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
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<a href="#id2566526" class="shortcut">Description</a></nobr></td></tr>
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<div class="refentry" lang="en">
<a name="libgimpbase-gimpsignal"></a><div class="titlepage"></div>
<div class="refnamediv"><table width="100%"><tr>
<td valign="top">
<h2>
<a name="id2557996"></a><span class="refentrytitle">gimpsignal</span>
</h2>
<p>gimpsignal — Portable signal handling.</p>
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<td valign="top" align="right"></td>
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<div class="refsynopsisdiv">
<h2>Synopsis</h2>
<pre class="synopsis">
void (<a href="libgimpbase-gimpsignal.html#GimpSignalHandlerFunc">*GimpSignalHandlerFunc</a>) (gint signum);
<a href="libgimpbase-gimpsignal.html#GimpSignalHandlerFunc">GimpSignalHandlerFunc</a> <a href="libgimpbase-gimpsignal.html#gimp-signal-private">gimp_signal_private</a> (gint signum,
<a href="libgimpbase-gimpsignal.html#GimpSignalHandlerFunc">GimpSignalHandlerFunc</a> handler,
gint flags);
</pre>
</div>
<div class="refsect1" lang="en">
<a name="id2566526"></a><h2>Description</h2>
<p>
Portable signal handling.
</p>
</div>
<div class="refsect1" lang="en">
<a name="id2566542"></a><h2>Details</h2>
<div class="refsect2" lang="en">
<a name="id2566552"></a><h3>
<a name="GimpSignalHandlerFunc"></a>GimpSignalHandlerFunc ()</h3>
<a class="indexterm" name="id2566563"></a><pre class="programlisting">void (*GimpSignalHandlerFunc) (gint signum);</pre>
<p>
A prototype for signal handler functions. Note that each function which
takes or returns a variable of this type also accepts or may return
special values defined by your system's signal.h header file (like
<em class="parameter"><code>SIG_DFL</code></em> or <em class="parameter"><code>SIG_IGN</code></em>).
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody><tr>
<td>
<span class="term"><em class="parameter"><code>signum</code></em> :</span></td>
<td>The number of the signal. Useful if different signals are handled
by a single handler.
</td>
</tr></tbody>
</table></div>
</div>
<hr>
<div class="refsect2" lang="en">
<a name="id2566625"></a><h3>
<a name="gimp-signal-private"></a>gimp_signal_private ()</h3>
<a class="indexterm" name="id2566637"></a><pre class="programlisting"><a href="libgimpbase-gimpsignal.html#GimpSignalHandlerFunc">GimpSignalHandlerFunc</a> gimp_signal_private (gint signum,
<a href="libgimpbase-gimpsignal.html#GimpSignalHandlerFunc">GimpSignalHandlerFunc</a> handler,
gint flags);</pre>
<p>
This function furnishes a workalike for signal(2) but
which internally invokes sigaction(2) after certain
sa_flags are set; these primarily to ensure restarting
of interrupted system calls. See sigaction(2) It is a
aid to transition and not new development: that effort
should employ sigaction directly. [gosgood 18.04.2000]
</p>
<p>
Cause <em class="parameter"><code>handler</code></em> to be run when <em class="parameter"><code>signum</code></em> is delivered. We
use sigaction(2) rather than signal(2) so that we can control the
signal handler's environment completely via <em class="parameter"><code>flags</code></em>: some signal(2)
implementations differ in their sematics, so we need to nail down
exactly what we want. [austin 06.04.2000]</p>
<p>
</p>
<div class="variablelist"><table border="0">
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<td>
<span class="term"><em class="parameter"><code>signum</code></em> :</span></td>
<td> Selects signal to be handled see man 5 signal (or man 7 signal)
</td>
</tr>
<tr>
<td>
<span class="term"><em class="parameter"><code>handler</code></em> :</span></td>
<td> Handler that maps to signum. Invoked by O/S.
Handler gets signal that caused invocation. Corresponds
to the <em class="parameter"><code>sa_handler</code></em> field of the <em class="parameter"><code>sigaction</code></em> struct.
</td>
</tr>
<tr>
<td>
<span class="term"><em class="parameter"><code>flags</code></em> :</span></td>
<td> Preferences. OR'ed SA_<xxx>. See man sigaction. Corresponds
to the <em class="parameter"><code>sa_flags</code></em> field of the <em class="parameter"><code>sigaction</code></em> struct.
</td>
</tr>
<tr>
<td>
<span class="term"><span class="emphasis"><em>Returns</em></span> :</span></td>
<td> A reference to the signal handling function which was
active before the call to <a href="libgimpbase-gimpsignal.html#gimp-signal-private"><code class="function">gimp_signal_private()</code></a>.
</td>
</tr>
</tbody>
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</div>
<div class="refsect1" lang="en">
<a name="id2542977"></a><h2>See Also</h2>
<p>
signal(2), signal(5 or 7), sigaction(2).
</p>
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