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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 <stdio.h>

#include <stdlib.h>

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>