/* 
Programmer: Greg Perkins
Program:    sigint.c
Class:      CS 73 - C/UNIX
Due:        April 28, 1998

This program demonstrates the use of signal to trap keyboard
interrupts from the terminal.  The program is a modification
of the one found on page 295; it counts/treats the interrupts
(^\) and (^C) differently.  To stop execution of the program, the
user can suspend execution (^Z) and then kill the program
externally.
*/

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

main()
{
	void cnt(int sig);
	signal(SIGINT, cnt);
	signal(SIGQUIT, cnt);
	printf("Begin counting INTERRUPTs\n");
	for (;;);	/* infinite loop */
}

void cnt(int sig)
{
	static int Ccount=0;
	static int Qcount=0;

	if (sig == SIGINT)
		Ccount++;
	else
		Qcount++;

	printf("Total INTERRUPTs received:   %5d - ^C   %5d - ^\\\n", Ccount,Qcount);
}