title: Server socket not working properly while running in background
body: <p>I have two process: Server and client. Both are different sockets. Initially I execute server socket by ./server and then ./client.</p>
  
  <p>But I wanted that server process should listen in background always for the request from client.</p>
  
  <p>Then inplace of executing ./server, i used ./server &amp; . This works fine in the first client call and then when i tried to connect to server it give connection failed</p>
  
  <p>server.cpp</p>
  
  <pre><code>    int main(int argc, char const *argv[]) 
      { 
          int server_fd, new_socket, valread; 
          struct sockaddr_in address; 
          int opt = 1; 
          int addrlen = sizeof(address); 
          char buffer[1024] = {0}; 
          const char *hello = "Hello from server"; 
       if ((server_fd = socket(AF_INET, SOCK_STREAM, 0)) == 0) 
          { 
              perror("socket failed"); 
              exit(EXIT_FAILURE); 
          } 
  
          // Forcefully attaching socket to the port 8080 
          if (setsockopt(server_fd, SOL_SOCKET, SO_REUSEADDR | SO_REUSEPORT, 
                                                        &amp;opt, sizeof(opt))) 
          { 
              perror("setsockopt"); 
              exit(EXIT_FAILURE); 
          } 
          address.sin_family = AF_INET; 
          address.sin_addr.s_addr = INADDR_ANY;
          address.sin_addr.s_addr = inet_addr("192.168.2.184"); 
          address.sin_port = htons( PORT ); 
  
  
  
  
          // Forcefully attaching socket to the port 8080 
          if (bind(server_fd, (struct sockaddr *)&amp;address,  
                                       sizeof(address))&lt;0) 
          { 
              perror("bind failed"); 
              exit(EXIT_FAILURE); 
          } 
          if (listen(server_fd, 3) &lt; 0) 
          { 
              perror("listen"); 
              exit(EXIT_FAILURE); 
          } 
          if ((new_socket = accept(server_fd, (struct sockaddr *)&amp;address,  
                             (socklen_t*)&amp;addrlen))&lt;0) 
          { 
              perror("accept"); 
              exit(EXIT_FAILURE); 
          } 
  
  
  
          valread = read( new_socket , buffer, 1024); 
          printf("%s\n",buffer ); 
          send(new_socket , hello , strlen(hello) , 0 ); 
          printf("Hello message sent\n"); 
          return 0; 
      } 
  </code></pre>
  
  <p>client.cpp</p>
  
  <pre><code>    int main(int argc, char const *argv[]) 
      { 
          int sock = 0, valread; 
          struct sockaddr_in serv_addr; 
          char *hello = "Hello from client"; 
          char buffer[1024] = {0}; 
          if ((sock = socket(AF_INET, SOCK_STREAM, 0)) &lt; 0) 
          { 
              printf("\n Socket creation error \n"); 
              return -1; 
          } 
  
          serv_addr.sin_family = AF_INET; 
          serv_addr.sin_port = htons(PORT); 
  
          // Convert IPv4 and IPv6 addresses from text to binary form 
          if(inet_pton(AF_INET, "192.168.2.184", &amp;serv_addr.sin_addr)&lt;=0)  
          { 
              printf("\nInvalid address/ Address not supported \n"); 
              return -1; 
          } 
  
          if (connect(sock, (struct sockaddr *)&amp;serv_addr, sizeof(serv_addr)) &lt; 0) 
          { 
              printf("\nConnection Failed \n"); 
              return -1; 
          } 
          send(sock , hello , strlen(hello) , 0 ); 
          printf("Hello message sent\n"); 
          valread = read( sock , buffer, 1024); 
          printf("%s\n",buffer ); 
      }
  </code></pre>