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Full Discussion: SIGSEGV Signal handling
Special Forums UNIX and Linux Applications SIGSEGV Signal handling Post 302342011 by jim mcnamara on Friday 7th of August 2009 07:22:37 AM
Old 08-07-2009
First off, do not run code in production that gets a SIGSEGV signal. It is really bad practice.

The simplest way, and definitely not the best is to block the signal with a call to signal()
Code:
#include <signal.h>
#include <stdio.h>

void my_signal_handler(int sig)
{
    write(STDERR_FILENO, "SEGFAULT!\n", 10); 
    signal(SIGSEGV, my_signal_handler); // reset the signal handler for SIGSEGV
    abort();
}

int main()
{
   signal(SIGSEGV, my_signal_handler); // initial set of signal handler
   /* do stuff here  */
   signal(SIGSEGV, SIG_DFL);  // restore default behavior

}

This is an example not meant to be used for production - it has potential race conditions, but you can use it to debug a SIGSEGV problem. In the my_signal_handler function be aware that you need to call only async safe functions like write() not std C lib funcions like printf()
 

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LEARN ABOUT DEBIAN

net::dbus::binding::message::signal

Net::DBus::Binding::Message::Signal(3pm)		User Contributed Perl Documentation		  Net::DBus::Binding::Message::Signal(3pm)

NAME

       Net::DBus::Binding::Message::Signal - a message encoding a signal

SYNOPSIS

	 use Net::DBus::Binding::Message::Signal;

	 my $signal = Net::DBus::Binding::Message::Signal->new(
	     object_path => "/org/example/myobject",
	     interface => "org.example.myobject",
	     signal_name => "foo_changed");

	 $connection->send($signal);

DESCRIPTION

       This module is part of the low-level DBus binding APIs, and should not be used by application code. No guarentees are made about APIs under
       the "Net::DBus::Binding::" namespace being stable across releases.

       This module provides a convenience constructor for creating a message representing a signal.

METHODS

       my $signal = Net::DBus::Binding::Message::Signal->new( object_path => $path, interface => $interface, signal_name => $name);
	   Creates a new message, representing a signal [to be] emitted by the object located under the path given by the "object_path" parameter.
	   The name of the signal is given by the "signal_name" parameter, and is scoped to the interface given by the "interface" parameter.

AUTHOR

       Daniel P. Berrange.

COPYRIGHT

       Copyright (C) 2004-2009 Daniel P. Berrange

SEE ALSO

       Net::DBus::Binding::Message

perl v5.14.2							    2011-06-30				  Net::DBus::Binding::Message::Signal(3pm)
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