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<concept id="GUID-186B9876-2A08-5F23-BB49-49EC34C51507" xml:lang="en"><title>Using
Signals to Terminate Processes</title><prolog><metadata><keywords/></metadata></prolog><conbody>
<p>A P.I.P.S. process can terminate another P.I.P.S process by sending a <codeph>SIGKILL</codeph> or
a <codeph>SIGTERM</codeph> signal to it using <xref href="GUID-16DC4A9D-44BC-36E2-AB97-5E9E7521937D.dita"><apiname>kill()</apiname></xref> or <xref href="GUID-3C70BF0B-CD6E-3A30-A9E6-4CCF11D47EEC.dita"><apiname>sigqueue()</apiname></xref>. </p>
<p> <codeph>SIGKILL</codeph> terminates a process without any notification.
Typically it used by a parent process to manage its children, or by a system
utility to terminate other applications. </p>
<p> <b>Note:</b> Your process must have the <b>PowerMangement</b> capability
to send a SIGKILL signal to another process. </p>
<p> <codeph> SIGTERM</codeph> is a request for termination. The receiving
process can choose to shutdown gracefully or ignore the request. The following
example code demonstrates how you can handle a <codeph>SIGTERM</codeph> signal
and shutdown a process: </p>
<codeblock id="GUID-F07EC689-C3DD-51BF-BFA8-6A430D42814A" xml:space="preserve">#include &lt;signal.h&gt;
#include &lt;stdio.h&gt;
#include &lt;stdlib.h&gt;
void sighandler(int signum)
    {
    if(signum == SIGTERM)
        {
        // Perform clean up
        exit(-1);
        }
    else
        printf(“Error: Unknown signal”);
    }
int main()
    {
    signal(SIGTERM,sighandler); // When SIGTERM arrives, invoke sighandler()
    // program logic
    return 0;
    }</codeblock>
</conbody><related-links>
<link href="GUID-66C1493D-5B85-558A-9A39-454E6EBA307B.dita"><linktext>Signal Emulation
on the Symbian Platform</linktext></link>
<link href="GUID-E65D91AE-482F-5592-B83C-0F29126C2EFA.dita"><linktext>Using Signals
to Handle Exceptions</linktext></link>
<link href="GUID-6CF8A41B-C2DD-5D57-A71D-6405CE08A06B.dita"><linktext>Using Signals
to Handle Asynchronous                 Events</linktext></link>
</related-links></concept>