C言語とRubyでsocket通信

client.rb

# -*- coding: utf-8 -*-

require 'socket'


socket = Socket.unix('./server_socket')

socket.write('A')

p socket.getc

socket.close

server.c

#include <sys/types.h>
#include <sys/socket.h>
#include <string.h>
#include <stdio.h>
#include <sys/un.h>
#include <unistd.h>

int main(void)
{
  int server_sockfd , client_sockfd ;
  int server_len , client_len ;
  struct sockaddr_un server_address ;
  struct sockaddr_un client_address ;

  unlink("server_socket");
  server_sockfd = socket(AF_UNIX,SOCK_STREAM,0);
  server_address.sun_family = AF_UNIX ;
  strcpy(server_address.sun_path , "server_socket");
  server_len = sizeof(server_address);
  bind(server_sockfd , (struct sockaddr *)&server_address , server_len);

  listen(server_sockfd , 5);
  while(1) {
    char ch ;

    printf("server waiting\n");

    client_sockfd = accept(server_sockfd ,(struct sockaddr *)&client_address , (socklen_t *)&client_len);

    read(client_sockfd,&ch,1);
    ch++;
    write(client_sockfd,&ch,1);
    close(client_sockfd);
  }
}