[PATCH] libio: Avoid dup already opened file descriptor [BZ#21393]

[Siddhesh Poyarekar]

On Tuesday 23 May 2017 01:48 AM, Adhemerval Zanella wrote:
> Alright, I will change it (I based this doc from freopen(3) btw).

Oh, which version?  I was going to suggest writing a man page patch as
well :)

Siddhesh