/* signal.c
 * 	Taken from [Jumpstart]
 *
 * 	Ilustrates the use of setjmp in signaling.
 * */

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

jmp_buf env;


void int_handler(int sig)
{
	//sigset(SIGINT, int_handler);
	signal(SIGINT, int_handler);
	printf("SIGINT signal=%d\n",sig);
	siglongjmp(env,1);
}

void quit_handler(int sig)
{
	signal(SIGQUIT, int_handler);
	printf("SIGQUIT signal=%d\n",sig);
	siglongjmp(env,1);
}

main()
{
	int i, k = 0;
	char buf[BUFSIZ];

	signal(SIGINT, int_handler);
	printf("SIGINT=%d\n",SIGINT);

	if (sigsetjmp(env,1) != 0){
		printf("restarted...\n");
		k=0;
	}

	for (i=0; ((i<20)&&(k<20)) ; i++) {//main loop
		printf("%d> ", ++k);
		gets(buf);
		printf("%s\n", buf);
	}
}