//----------------------------------------------------------------
//	mysignal.cpp
//
//	This demo shows a use of the 'signal()' library-function.
//	After delivering five 'SIGINT' signals the program exits.
//	A 'SIGINT' signal is issued when a user hits <CONTROL-C>.
//
//	programmer: ALLAN CRUSE
//	written on: 16 SEP 2004
//----------------------------------------------------------------

#include <stdio.h>	// for printf()
#include <signal.h>	// for signal()

int done = 0;		

void upon_signal( int signum )
{
	static int	count = 0;

	++count;
	printf( "#%d: signum=%d\n", count, signum );
	if ( count > 4 ) done = 1;
}

int main( void )
{
	//----------------------------
	// install our signal-handler
	//---------------------------- 
	signal( SIGINT, upon_signal );	

	//----------------------------------------------------
	// main program-loop (it just checks the 'done' flag)
	//---------------------------------------------------- 
	while( !done ) { /* useful actions could go here */ };

	//-------------------------
	// shows exit-notification 
	//-------------------------
	printf( "Quitting\n" );
}