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<title>gimpsignal: GIMP Base Library Reference Manual</title>
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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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<div class="refsect1">
<a name="libgimpbase-gimpsignal.functions"></a><h2>Functions</h2>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="functions_return">
<col class="functions_name">
</colgroup>
<tbody>
<tr>
<td class="function_type">
<span class="returnvalue">void</span>
</td>
<td class="function_name">
<span class="c_punctuation">(</span><a class="link" href="libgimpbase-gimpsignal.html#GimpSignalHandlerFunc" title="GimpSignalHandlerFunc ()">*GimpSignalHandlerFunc</a><span class="c_punctuation">)</span> <span class="c_punctuation">()</span>
</td>
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<tr>
<td class="function_type">
<a class="link" href="libgimpbase-gimpsignal.html#GimpSignalHandlerFunc" title="GimpSignalHandlerFunc ()"><span class="returnvalue">GimpSignalHandlerFunc</span></a>
</td>
<td class="function_name">
<a class="link" href="libgimpbase-gimpsignal.html#gimp-signal-private" title="gimp_signal_private ()">gimp_signal_private</a> <span class="c_punctuation">()</span>
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<div class="refsect1">
<a name="libgimpbase-gimpsignal.description"></a><h2>Description</h2>
<p>Portable signal handling.</p>
</div>
<div class="refsect1">
<a name="libgimpbase-gimpsignal.functions_details"></a><h2>Functions</h2>
<div class="refsect2">
<a name="GimpSignalHandlerFunc"></a><h3>GimpSignalHandlerFunc ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
<span class="c_punctuation">(</span>*GimpSignalHandlerFunc<span class="c_punctuation">)</span> (<em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint"><span class="type">gint</span></a> signum</code></em>);</pre>
<p>A prototype for a reference to a 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="refsect3">
<a name="GimpSignalHandlerFunc.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>signum</p></td>
<td class="parameter_description"><p>The number of the signal. Useful if different signals are
handled by a single handler.</p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
</div>
<hr>
<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><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint"><span class="type">gint</span></a> 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><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint"><span class="type">gint</span></a> 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]</p>
<div class="refsect3">
<a name="gimp-signal-private.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>signum</p></td>
<td class="parameter_description"><p>Selects signal to be handled see man 5 signal (or man 7 signal)</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>handler</p></td>
<td class="parameter_description"><p>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.</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>flags</p></td>
<td class="parameter_description"><p>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.</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="gimp-signal-private.returns"></a><h4>Returns</h4>
<p> 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>.</p>
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</div>
</div>
<div class="refsect1">
<a name="libgimpbase-gimpsignal.other_details"></a><h2>Types and Values</h2>
</div>
<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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