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<h2><span class="refentrytitle"><a name="libgimpbase-gimpsignal.top_of_page"></a>gimpsignal</span></h2>
<p>gimpsignal — Portable signal handling.</p>
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<a name="libgimpbase-gimpsignal.synopsis"></a><h2>Synopsis</h2>
<pre class="synopsis"><span class="returnvalue">void</span> (<a class="link" href="libgimpbase-gimpsignal.html#GimpSignalHandlerFunc" title="GimpSignalHandlerFunc ()">*GimpSignalHandlerFunc</a>) (<em class="parameter"><code><span class="type">gint</span> signum</code></em>);
<a class="link" href="libgimpbase-gimpsignal.html#GimpSignalHandlerFunc" title="GimpSignalHandlerFunc ()"><span class="returnvalue">GimpSignalHandlerFunc</span></a> <a class="link" href="libgimpbase-gimpsignal.html#gimp-signal-private" title="gimp_signal_private ()">gimp_signal_private</a> (<em class="parameter"><code><span class="type">gint</span> signum</code></em>,
<em class="parameter"><code><a class="link" href="libgimpbase-gimpsignal.html#GimpSignalHandlerFunc" title="GimpSignalHandlerFunc ()"><span class="type">GimpSignalHandlerFunc</span></a> handler</code></em>,
<em class="parameter"><code><span class="type">gint</span> flags</code></em>);
</pre>
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<div class="refsect1">
<a name="libgimpbase-gimpsignal.description"></a><h2>Description</h2>
<p>
Portable signal handling.
</p>
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<a name="libgimpbase-gimpsignal.details"></a><h2>Details</h2>
<div class="refsect2">
<a name="GimpSignalHandlerFunc"></a><h3>GimpSignalHandlerFunc ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span> (*GimpSignalHandlerFunc) (<em class="parameter"><code><span class="type">gint</span> signum</code></em>);</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>
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<td><p><span class="term"><em class="parameter"><code>signum</code></em> :</span></p></td>
<td>The number of the signal. Useful if different signals are handled
by a single handler.</td>
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<div class="refsect2">
<a name="gimp-signal-private"></a><h3>gimp_signal_private ()</h3>
<pre class="programlisting"><a class="link" href="libgimpbase-gimpsignal.html#GimpSignalHandlerFunc" title="GimpSignalHandlerFunc ()"><span class="returnvalue">GimpSignalHandlerFunc</span></a> gimp_signal_private (<em class="parameter"><code><span class="type">gint</span> signum</code></em>,
<em class="parameter"><code><a class="link" href="libgimpbase-gimpsignal.html#GimpSignalHandlerFunc" title="GimpSignalHandlerFunc ()"><span class="type">GimpSignalHandlerFunc</span></a> handler</code></em>,
<em class="parameter"><code><span class="type">gint</span> flags</code></em>);</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]
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<td><p><span class="term"><em class="parameter"><code>signum</code></em> :</span></p></td>
<td>Selects signal to be handled see man 5 signal (or man 7 signal)</td>
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<td><p><span class="term"><em class="parameter"><code>handler</code></em> :</span></p></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>
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<td><p><span class="term"><em class="parameter"><code>flags</code></em> :</span></p></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>
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<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>A reference to the signal handling function which was
active before the call to <a class="link" href="libgimpbase-gimpsignal.html#gimp-signal-private" title="gimp_signal_private ()"><code class="function">gimp_signal_private()</code></a>.</td>
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<div class="refsect1">
<a name="libgimpbase-gimpsignal.see-also"></a><h2>See Also</h2>
<p>
signal(2), signal(5 or 7), sigaction(2).
</p>
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