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<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" lang="en" xml:lang="en">
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<title>KCrash</title>
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<img alt ="" src="../common/top-kde.jpg"/>
KDE 4.9 PyKDE API Reference
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<ul>
<li>KDE's Python API</li>
</ul>
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<h1>KCrash Namespace Reference</h1>
<code>from PyKDE4.kdeui.KCrash import *</code>
<p>
<h2>Detailed Description</h2>
<p>This namespace contains functions to handle crashes.
It allows you to set a crash handler function that will be called
when your application crashes and also provides a default crash
handler that implements the following functionality:
<li> Launches the KDE crash display application (DrKonqi) to let </li>
the user report the bug and/or debug it.
<li> Calls an emergency save function that you can set with </li>
setEmergencySaveFunction() to attempt to save the application's data.
<li> Autorestarts your application. </li>
</p>
<p>
<dl class="note" compact><dt><b>Note:</b></dt><dd> All the above features are optional and you need to enable them
explicitly. By default, the defaultCrashHandler() will not do anything.
However, if you are using KApplication, it will by default enable launching
DrKonqi on crashes, unless the --nocrashhandler argument was passed on
the command line or the environment variable KDE_DEBUG is set to any value.
</dd></dl>
</p>
<table border="0" cellpadding="0" cellspacing="0"><tr><td colspan="2"><br><h2>Enumerations</h2></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="el" href="#CrashFlag">CrashFlag</a> </td><td class="memItemRight" valign="bottom">{ KeepFDs, SaferDialog, AlwaysDirectly, AutoRestart }</td></tr>
<tr><td colspan="2"><br><h2>Functions</h2></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"><a href="../kdeui/KCrash.html">KCrash.HandlerType</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="#crashHandler">crashHandler</a> ()</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"> </td><td class="memItemRight" valign="bottom"><a class="el" href="#defaultCrashHandler">defaultCrashHandler</a> (int signal)</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"><a href="../kdeui/KCrash.html">KCrash.HandlerType</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="#emergencySaveFunction">emergencySaveFunction</a> ()</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">bool </td><td class="memItemRight" valign="bottom"><a class="el" href="#isDrKonqiEnabled">isDrKonqiEnabled</a> ()</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"> </td><td class="memItemRight" valign="bottom"><a class="el" href="#setApplicationName">setApplicationName</a> (QString name)</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"> </td><td class="memItemRight" valign="bottom"><a class="el" href="#setApplicationPath">setApplicationPath</a> (QString path)</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"> </td><td class="memItemRight" valign="bottom"><a class="el" href="#setCrashHandler">setCrashHandler</a> (<a href="../kdeui/KCrash.html">KCrash.HandlerType</a> handler=defaultCrashHandler)</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"> </td><td class="memItemRight" valign="bottom"><a class="el" href="#setDrKonqiEnabled">setDrKonqiEnabled</a> (bool enabled)</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"> </td><td class="memItemRight" valign="bottom"><a class="el" href="#setEmergencySaveFunction">setEmergencySaveFunction</a> (<a href="../kdeui/KCrash.html">KCrash.HandlerType</a> saveFunction=0)</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"> </td><td class="memItemRight" valign="bottom"><a class="el" href="#setFlags">setFlags</a> (<a href="../kdeui/KCrash.html">KCrash.CrashFlags</a> flags)</td></tr>
</table>
<hr><h2>Enumeration Documentation</h2><a class="anchor" name="CrashFlag"></a>
<div class="memitem">
<div class="memproto">
<table class="memname">
<tr><td class="memname">CrashFlag</td>
</tr>
</table>
</div>
<div class="memdoc"><p>Options to determine how the default crash handler should behave.
</p><dl compact><dt><b>Enumerator: </b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0"><tr><td valign="top"><em>KeepFDs</em> = 1</td><td><tr><td valign="top"><em>SaferDialog</em> = 2</td><td><tr><td valign="top"><em>AlwaysDirectly</em> = 4</td><td><tr><td valign="top"><em>AutoRestart</em> = 8</td><td></table>
</dl>
</div></div><p><hr><h2>Function Documentation</h2><a class="anchor" name="crashHandler"></a>
<div class="memitem">
<div class="memproto">
<table class="memname"><tr>
<td class="memname"><a href="../kdeui/KCrash.html">KCrash.HandlerType</a> crashHandler</td>
<td>(</td>
<td class="paramtype"> </td>
<td class="paramname">)</td>
<td width="100%"> </td>
</tr>
</table>
</div>
<div class="memdoc"><p>Returns the installed crash handler.
<dl class="return" compact><dt><b>Returns:</b></dt><dd> the crash handler
</dd></dl>
</p></div></div><a class="anchor" name="defaultCrashHandler"></a>
<div class="memitem">
<div class="memproto">
<table class="memname"><tr>
<td class="memname"> defaultCrashHandler</td>
<td>(</td>
<td class="paramtype">int </td>
<td class="paramname"><em>signal</em></td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td>
<td></td>
<td width="100%"> </td>
</tr></table>
</div>
<div class="memdoc"><p>The default crash handler.
Do not call this function directly. Instead, use
setCrashHandler() to set it as your application's crash handler.
</p><dl compact><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td></td><td valign="top"><em>signal</em> </td><td> the signal number
</td></tr> </table></dl>
<p> <dl class="note" compact><dt><b>Note:</b></dt><dd> If you implement your own crash handler, you will have to
call this function from your implementation if you want to use the
features of this namespace.
</dd></dl>
</p></div></div><a class="anchor" name="emergencySaveFunction"></a>
<div class="memitem">
<div class="memproto">
<table class="memname"><tr>
<td class="memname"><a href="../kdeui/KCrash.html">KCrash.HandlerType</a> emergencySaveFunction</td>
<td>(</td>
<td class="paramtype"> </td>
<td class="paramname">)</td>
<td width="100%"> </td>
</tr>
</table>
</div>
<div class="memdoc"><p>Returns the currently set emergency save function.
<dl class="return" compact><dt><b>Returns:</b></dt><dd> the emergency save function
</dd></dl>
</p></div></div><a class="anchor" name="isDrKonqiEnabled"></a>
<div class="memitem">
<div class="memproto">
<table class="memname"><tr>
<td class="memname">bool isDrKonqiEnabled</td>
<td>(</td>
<td class="paramtype"> </td>
<td class="paramname">)</td>
<td width="100%"> </td>
</tr>
</table>
</div>
<div class="memdoc"><p>Returns true if DrKonqi is set to be launched from the crash handler or false otherwise.
<dl class="since" compact><dt><b>Since:</b></dt><dd> 4.5
</dd></dl>
</p></div></div><a class="anchor" name="setApplicationName"></a>
<div class="memitem">
<div class="memproto">
<table class="memname"><tr>
<td class="memname"> setApplicationName</td>
<td>(</td>
<td class="paramtype">QString </td>
<td class="paramname"><em>name</em></td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td>
<td></td>
<td width="100%"> </td>
</tr></table>
</div>
<div class="memdoc"><p>Sets the application <b>name</b> which should be passed to
DrKonqi, our nice crash display application.
</p><dl compact><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td></td><td valign="top"><em>name</em> </td><td> the name of the application, as shown in DrKonqi
</td></tr>
</table></dl>
<p>
</p></div></div><a class="anchor" name="setApplicationPath"></a>
<div class="memitem">
<div class="memproto">
<table class="memname"><tr>
<td class="memname"> setApplicationPath</td>
<td>(</td>
<td class="paramtype">QString </td>
<td class="paramname"><em>path</em></td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td>
<td></td>
<td width="100%"> </td>
</tr></table>
</div>
<div class="memdoc"><p>Sets the application <b>path</b> which should be passed to
DrKonqi, our nice crash display application.
</p><dl compact><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td></td><td valign="top"><em>path</em> </td><td> the application path
</td></tr>
</table></dl>
<p>
</p></div></div><a class="anchor" name="setCrashHandler"></a>
<div class="memitem">
<div class="memproto">
<table class="memname"><tr>
<td class="memname"> setCrashHandler</td>
<td>(</td>
<td class="paramtype"><a href="../kdeui/KCrash.html">KCrash.HandlerType</a> </td>
<td class="paramname"><em>handler=defaultCrashHandler</em></td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td>
<td></td>
<td width="100%"> </td>
</tr></table>
</div>
<div class="memdoc"><p>Install a function to be called when a crash occurs.
A crash occurs when one of the following signals is
caught: SIGSEGV, SIGBUS, SIGFPE, SIGILL, SIGABRT.
</p><dl compact><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td></td><td valign="top"><em>handler</em> </td><td> this can be one of:
</td></tr> </table></dl>
<p> <li> null, in which case signal catching is disabled </li>
(by setting the signal handler for the crash signals to SIG_DFL)
<li> a user defined function in the form: </li>
static (if in a class) void myCrashHandler(int);
<li> if handler is omitted, the default crash handler is installed </li>
<dl class="note" compact><dt><b>Note:</b></dt><dd> If you use setDrKonqiEnabled(true), setEmergencySaveFunction(myfunc)
or setFlags(AutoRestart), you do not need to call this function
explicitly. The default crash handler is automatically installed by
those functions if needed. However, if you set a custom crash handler,
those functions will not change it.
</dd></dl>
</p></div></div><a class="anchor" name="setDrKonqiEnabled"></a>
<div class="memitem">
<div class="memproto">
<table class="memname"><tr>
<td class="memname"> setDrKonqiEnabled</td>
<td>(</td>
<td class="paramtype">bool </td>
<td class="paramname"><em>enabled</em></td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td>
<td></td>
<td width="100%"> </td>
</tr></table>
</div>
<div class="memdoc"><p>Enables or disables launching DrKonqi from the crash handler.
By default, launching DrKonqi is disabled. However, KApplication
will enable it in its constructor, so you don't need to call this
function if you are using KApplication.
<dl class="note" compact><dt><b>Note:</b></dt><dd> It is the crash handler's responsibility to launch DrKonqi.
Therefore, if no crash handler is set, this method also installs
the default crash handler to ensure that DrKonqi will be launched.
</dd></dl> <dl class="since" compact><dt><b>Since:</b></dt><dd> 4.5
</dd></dl>
</p></div></div><a class="anchor" name="setEmergencySaveFunction"></a>
<div class="memitem">
<div class="memproto">
<table class="memname"><tr>
<td class="memname"> setEmergencySaveFunction</td>
<td>(</td>
<td class="paramtype"><a href="../kdeui/KCrash.html">KCrash.HandlerType</a> </td>
<td class="paramname"><em>saveFunction=0</em></td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td>
<td></td>
<td width="100%"> </td>
</tr></table>
</div>
<div class="memdoc"><p>Installs a function which should try to save the application's data.
<dl class="note" compact><dt><b>Note:</b></dt><dd> It is the crash handler's responsibility to call this function.
Therefore, if no crash handler is set, the default crash handler
is installed to ensure the save function will be called.
</dd></dl> </p><dl compact><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td></td><td valign="top"><em>saveFunction</em> </td><td> the handler to install
</td></tr>
</table></dl>
<p>
</p></div></div><a class="anchor" name="setFlags"></a>
<div class="memitem">
<div class="memproto">
<table class="memname"><tr>
<td class="memname"> setFlags</td>
<td>(</td>
<td class="paramtype"><a href="../kdeui/KCrash.html">KCrash.CrashFlags</a> </td>
<td class="paramname"><em>flags</em></td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td>
<td></td>
<td width="100%"> </td>
</tr></table>
</div>
<div class="memdoc"><p>Set options to determine how the default crash handler should behave.
</p><dl compact><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td></td><td valign="top"><em>flags</em> </td><td> ORed together CrashFlags
</td></tr>
</table></dl>
<p>
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