tsleep2.c

APUE(第二版)的随书源代码,与第一版的代码相比增加了一些章节的代码(详见第二版的说明)

#include	<signal.h>
#include	"ourhdr.h"

unsigned int	sleep2(unsigned int);
static void		sig_int(int);

int
main(void)
{
	unsigned int	unslept;

	if (signal(SIGINT, sig_int) == SIG_ERR)
		err_sys("signal(SIGINT) error");

	unslept = sleep2(5);
	printf("sleep2 returned: %u\n", unslept);

	exit(0);
}

static void
sig_int(int signo)
{
	int				i;
	volatile int	j;

	printf("\nsig_int starting\n");
	for (i = 0; i < 2000000; i++)
		j += i * i;
	printf("sig_int finished\n");
	return;
}