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代码： 全选

//SERVER
#include<fcntl.h>
#include <unistd.h>
#include <stdio.h>

//int clientpipe;

int main(){
	int serverpipe = open("/run/server", O_RDONLY);

	size_t n;
	typedef struct {
		enum {CONNECT, DISCONNECT} cmd;
		pid_t pid;
	} msg_t;
	msg_t msg;
	while(n=read(serverpipe, &msg, sizeof(msg))){
		if(msg.cmd == CONNECT){
			printf("client%d connect\n", msg.pid);
			//clientpipe = open("/run/client", O_WRONLY);
		}
		else{
			printf("client disconnect\n");
			//close(clientpipe);
			break;
		}
	}
	close(serverpipe);

	return 0;
}

代码： 全选

//CLIENT
#include <fcntl.h>
#include <unistd.h>

int main(){
	int serverpipe = open("/run/server", O_WRONLY);
	typedef struct {
		enum {CONNECT, DISCONNECT} cmd;
		pid_t pid;
	} msg_t;
	msg_t msg;

	msg = (msg_t){CONNECT, 0};
	msg.pid = getpid();
	write(serverpipe, &msg, sizeof(msg));

	msg = (msg_t){DISCONNECT, 0};
	write(serverpipe, &msg, sizeof(msg));

	close(serverpipe);
	return 0;
}