Re: Strange select behavior

[Bas Wijnen]

Giuseppe Scrivano wrote:
>   server_socket = socket (PF_INET, SOCK_STREAM, 0);
Check if the call succeeded (server_socket >= 0)
>   
>   /* address family.  */
>   sock_in.sin_family = PF_INET;
>   
>   /* port used.  */
>   sock_in.sin_port = htons (8080);
>   sock_in.sin_addr.s_addr = INADDR_ANY;
>   err = bind (server_socket, (struct sockaddr *) &sock_in, sizeof (struct 
> sockaddr_in));
Check if the call succeeded (err != -1)
>   for(;;)
>   {
>     err = listen (server_socket, backlog);
>     addrlen = sizeof (struct sockaddr);
>     socklen_t ddrlen=0;
>     int datatoread;
>     do
>     {
>       datatoread = dataToRead(server_socket);
>       sleep(1);
I don't understand why you need this with a nonzero timeout in select()...
>       printf("datatoread: %i\n",datatoread);
>     }
>     while(!datatoread);
>     
>     asock = accept (server_socket, (struct sockaddr *) &asock_in, &ddrlen);
>
>     err = send (asock, &send_buff[0], strlen (send_buff), 0);
>     if(err != strlen (send_buff))
>       printf("Error sending to socket\n");
It is not an error for err to be < strlen (send_buff), as long as it is 
> 0.  == 0 is in many cases not an error either, I think.

My guess is your problem comes from socket() or bind() failing.  Check 
their return value, and errno.

Thanks,
Bas

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