与基本fifo的客户端-服务器通信，在收到消息后从服务器向客户端发送确认

Question

我希望服务器在收到来自客户端的消息后向其发送确认消息。 我正在尝试将消息打印在客户端

服务器

  // This is the server
  int main(int argc, char *argv[]){  
   int fd;
  char ch;

unlink("../myserver"); // delete it if it exists  

      if(mkfifo("../myserver", 0777)!=0)
    exit(1);

      while(1){
    fprintf(stderr, "Waiting for a client\n");  

    fd = open("../myserver", O_RDONLY);  
    fprintf(stderr, "Got a client: ");  


        if(read(fd, &ch, 1) == 1){
        fprintf(stderr, "%c ", ch);
        close(fd);
    }
  }
}

客户端

 int main(int argc, char *argv[]){  
  int fd;
char ch;
char reply[100];

while((fd=open("../myserver", O_WRONLY))==-1){  
    fprintf(stderr, "trying to connect\n");  
    sleep(1);
}

printf("Connected: type in data to be sent\n");  

while((ch=getchar()) != -1) // -1 is CTRL-D
    write(fd, &ch, 1);  

close(fd);

while(fd = open("../myserver", O_RDONLY));  
    fprintf(stderr, "received message\n");
 }