进程间通信测试-signal

#include	<stdio.h>
#include    <string.h>
#include	<signal.h>
#include    <unistd.h>
#include<time.h>
#include<stdlib.h>

#define	INPUTLEN	100

int main(int argc, char *argv[])
{
	void inthandler(int);
	void quithandler(int);
	char input[INPUTLEN];
	int nchars;

	signal(SIGINT, inthandler);//^C	
	signal(SIGQUIT, quithandler);//^\

	do {
		nchars = read(0, input, (INPUTLEN - 1));
		if (nchars == -1)
			perror("read returned an error");
	}
	while (strncmp(input, "quit", 4) != 0);
	return 0;
}

void inthandler(int s)
{
    int a;
    int flag;
	srand((unsigned int)time(NULL));
        if((a=rand()*2+1)>0)
        {
            printf("奇数随机数为：%d\n",a);
        }
        else{
            printf("奇数随机数为：%d\n",-a);
        }
		
}

void quithandler(int s)
{
    int b;
	srand((unsigned int)time(NULL));
        if((b=rand()*2)>0)
        {
            printf("偶数随机数为：%d\n",b);
        }
        else{
            printf("偶数随机数为：%d\n",-b);
        }
		
}