[Tarantool-patches] [PATCH 09/13] popen: remove redundant fd check before perform IO

[Cyrill Gorcunov]

On Fri, Apr 10, 2020 at 05:50:47AM +0300, Alexander Turenko wrote:
> The function already checks flags to find out whether the file
> descriptor should be available for reading / writing. When it is so, the
> corresponding fd is great or equal to zero.
> 
> The further commits will add missed diagnostics for IO functions and it
> is hard to write a meaningful error message for a situation that is not
> possible. Moreover, we would obligated to document the error as one of
> possible failures in a function contract (while it can't occur).
> 
> Part of #4031
Acked-by: Cyrill Gorcunov <gorcunov at gmail.com>