/*
	signal.c
	
	Started by Jeff Ondich on 3/26/96
	Last modified 4/1/02
	
	This program gives a simple example of how a process
	can catch a signal.  Here, SIGINT signals (typically
	generated by the user hitting CTL-C) are caught.
*/

#include	<stdio.h>
#include	<signal.h>

const int limit = 200000000;
const int frequency = 5000000;

void interrupt_handler( int );

int main()
{
	long		i;

  /* The initial handler for the SIGINT signal is
     assuredly the default, so confusion will not reign */

	if( signal(SIGINT,interrupt_handler) != SIG_DFL )
		fprintf( stderr, "I'm confused.\n" );


  /* Start counting. */

	for( i=0; i < limit; i++ )
	{
		if( i % frequency == 0 )
		{
			fprintf( stderr, "%ld\n", i );
			fflush( stderr );
		}
	}

	return 0;
}


void interrupt_handler( int sig )
{
	fprintf( stderr, "Sorry, but I just don't want to quit.\n" );
	fflush( stderr );
}