Re: Testing if a Socket is Blocked or Non-Blocked

[Scott Klement <rpg400-l@xxxxxxxxxxxxxxxx>]

You can use fcntl() with F_GETFL to get the current socket flags.  You 
can then use %BITAND to test if the O_NONBLOCK flag is set.

  flags = fcntl( fd: F_GETFL);
  if %bitand( flags: O_NONBLOCK) <> 0;
     // socket is in non-blocking mode
  else;
     // socket is in blocking mode
  endif;

Having said that, I don't understand why it matters?  If you want it in 
non-blocking mode, just set it to non-blocking.  why does it matter what 
it used to be?


On 9/24/2015 1:39 PM, Jeff Young wrote:
> All,
> Using the information provided by Scott Klement and others here, I have
> managed to get my socket programs work properly using Non-blocked sockets
> and timeouts.
> The only problem that I have is that I have to set the socket to
> non-blocked in my main processing program before I issue the accept, read,
> connect or write functions in non-blocked mode.
> Is there any way to determine before executing the non-blocked functions
> whether the socket has been set for non-blocked?
>
>
> Jeff Young
> Sr. Programmer Analyst