Detect if connection was closed on remote side

[AlannY]

Hi there. I'm writing a tool, which must detect is connection was terminated on remote side.

Every action on network, I'm fetching with select(). And I want in some place check if connection still active.

There are code:

while (1)
  {
    tv.tv_sec = 1;
    tv.tv_usec = 0; 

    FD_ZERO (&readfds);
    FD_SET (priv->socket, &readfds); 
    rc = select (priv->socket+1, &readfds, NULL, NULL, &tv);

    if (rc<0)
      {
         /* error of using select() */
      }
    else if (rc==0)
      {
         /* timeout */
      }
    else
      {
         /* HERE I can read data */
      }

     /* and HERE I want to check if connection still active*/
  }

How to do it in my code?