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

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

   unlink("server_socket");  // remocao de socket antigo
   server_sockfd = socket(AF_UNIX, SOCK_STREAM, 0);  // cria um novo socket

   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("Servidor esperando ...\n");
      client_sockfd = accept(server_sockfd, (struct sockaddr *) &client_address, &client_len);

      recv(client_sockfd, &ch, 1,0);
      // read(client_sockfd, &ch, 1);
      ch++;
      send(client_sockfd, &ch, 1,0);
      //write(client_sockfd, &ch, 1);
      close(client_sockfd);
   }
}