157 lines
7.8 KiB
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157 lines
7.8 KiB
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<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
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<title>gimpsignal</title>
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<a href="#libgimpbase-gimpsignal.synopsis" class="shortcut">Top</a>
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<a href="#libgimpbase-gimpsignal.description" class="shortcut">Description</a>
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</table>
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<div class="refentry" lang="en">
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<a name="libgimpbase-gimpsignal"></a><div class="titlepage"></div>
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<div class="refnamediv"><table width="100%"><tr>
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<td valign="top">
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<h2><span class="refentrytitle"><a name="libgimpbase-gimpsignal.top_of_page"></a>gimpsignal</span></h2>
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<p>gimpsignal — Portable signal handling.</p>
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</td>
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<td valign="top" align="right"></td>
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</tr></table></div>
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<div class="refsynopsisdiv">
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<a name="libgimpbase-gimpsignal.synopsis"></a><h2>Synopsis</h2>
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<pre class="synopsis">
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void (<a class="link" href="libgimpbase-gimpsignal.html#GimpSignalHandlerFunc" title="GimpSignalHandlerFunc ()">*GimpSignalHandlerFunc</a>) (<a
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href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gint"
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>gint</a> signum);
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<a class="link" href="libgimpbase-gimpsignal.html#GimpSignalHandlerFunc" title="GimpSignalHandlerFunc ()">GimpSignalHandlerFunc</a> <a class="link" href="libgimpbase-gimpsignal.html#gimp-signal-private" title="gimp_signal_private ()">gimp_signal_private</a> (<a
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href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gint"
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>gint</a> signum,
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<a class="link" href="libgimpbase-gimpsignal.html#GimpSignalHandlerFunc" title="GimpSignalHandlerFunc ()">GimpSignalHandlerFunc</a> handler,
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<a
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href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gint"
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>gint</a> flags);
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</pre>
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</div>
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<div class="refsect1" lang="en">
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<a name="libgimpbase-gimpsignal.description"></a><h2>Description</h2>
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<p>
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Portable signal handling.
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</p>
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</div>
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<div class="refsect1" lang="en">
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<a name="libgimpbase-gimpsignal.details"></a><h2>Details</h2>
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<div class="refsect2" lang="en">
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<a name="GimpSignalHandlerFunc"></a><h3>GimpSignalHandlerFunc ()</h3>
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<pre class="programlisting">void (*GimpSignalHandlerFunc) (<a
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href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gint"
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>gint</a> signum);</pre>
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<p>
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A prototype for signal handler functions. Note that each function which
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takes or returns a variable of this type also accepts or may return
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special values defined by your system's signal.h header file (like
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<em class="parameter"><code>SIG_DFL</code></em> or <em class="parameter"><code>SIG_IGN</code></em>).
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</p>
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<div class="variablelist"><table border="0">
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<col align="left" valign="top">
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<tbody><tr>
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<td><p><span class="term"><em class="parameter"><code>signum</code></em> :</span></p></td>
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<td>The number of the signal. Useful if different signals are handled
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by a single handler.
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</td>
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</tr></tbody>
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</table></div>
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</div>
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<hr>
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<div class="refsect2" lang="en">
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<a name="gimp-signal-private"></a><h3>gimp_signal_private ()</h3>
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<pre class="programlisting"><a class="link" href="libgimpbase-gimpsignal.html#GimpSignalHandlerFunc" title="GimpSignalHandlerFunc ()">GimpSignalHandlerFunc</a> gimp_signal_private (<a
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href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gint"
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>gint</a> signum,
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<a class="link" href="libgimpbase-gimpsignal.html#GimpSignalHandlerFunc" title="GimpSignalHandlerFunc ()">GimpSignalHandlerFunc</a> handler,
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<a
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href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gint"
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>gint</a> flags);</pre>
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<p>
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This function furnishes a workalike for signal(2) but
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which internally invokes sigaction(2) after certain
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sa_flags are set; these primarily to ensure restarting
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of interrupted system calls. See sigaction(2) It is a
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aid to transition and not new development: that effort
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should employ sigaction directly. [gosgood 18.04.2000]
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</p>
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<p>
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Cause <em class="parameter"><code>handler</code></em> to be run when <em class="parameter"><code>signum</code></em> is delivered. We
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use sigaction(2) rather than signal(2) so that we can control the
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signal handler's environment completely via <em class="parameter"><code>flags</code></em>: some signal(2)
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implementations differ in their sematics, so we need to nail down
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exactly what we want. [austin 06.04.2000]</p>
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<p>
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</p>
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<div class="variablelist"><table border="0">
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<col align="left" valign="top">
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<tbody>
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<tr>
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<td><p><span class="term"><em class="parameter"><code>signum</code></em> :</span></p></td>
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<td> Selects signal to be handled see man 5 signal (or man 7 signal)
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</td>
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</tr>
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<tr>
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<td><p><span class="term"><em class="parameter"><code>handler</code></em> :</span></p></td>
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<td> Handler that maps to signum. Invoked by O/S.
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Handler gets signal that caused invocation. Corresponds
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to the <em class="parameter"><code>sa_handler</code></em> field of the <em class="parameter"><code>sigaction</code></em> struct.
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</td>
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</tr>
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<tr>
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<td><p><span class="term"><em class="parameter"><code>flags</code></em> :</span></p></td>
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<td> Preferences. OR'ed SA_<xxx>. See man sigaction. Corresponds
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to the <em class="parameter"><code>sa_flags</code></em> field of the <em class="parameter"><code>sigaction</code></em> struct.
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</td>
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</tr>
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<tr>
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<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
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<td> A reference to the signal handling function which was
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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>.
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</td>
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</tr>
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</tbody>
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</table></div>
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</div>
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</div>
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<div class="refsect1" lang="en">
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<a name="libgimpbase-gimpsignal.see-also"></a><h2>See Also</h2>
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<p>
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signal(2), signal(5 or 7), sigaction(2).
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</p>
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</div>
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</div>
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