third.c

linux下的进程间通信

int main() {
	int fd[2],pid,flagRecv=1,flagSend=1,count=1;
	char msgsend[] = "Hi,Kid!";
	char msgrecv[7];
	if(pipe(fd) == -1) return 1;

	if((pid=fork()) == 0) {
		close(fd[1]);
		while(flagRecv) {
			read(fd[0],msgrecv,strlen(msgsend));
		printf("子进程开始接受第%d条信息来自父进程....\n",count++);
		printf("read[%s] from pipe\n",msgrecv);
		if(count == 4) {
			return 0;		
		}
		}
		return 0;
	}
	else {
		close(fd[0]);
		sleep(2);
		while(flagSend) {		
			printf("父进程开始发送信息给子进程第%d条信息....\n",count);		
			write(fd[1],msgsend,strlen(msgsend));
			sleep(3);
			count++;
			if(count == 4) {
				return 0;
			}
		}
	return 0;
	}
	return 0;
}