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Date: Wed, 6 Jul 2022 16:17:04 +0200
From: Corinna Vinschen <corinna-cygwin AT cygwin DOT com>
To: cygwin AT cygwin DOT com
Subject: Re: Typo in <sys/select.h>?
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On Jul  6 13:19, Lavrentiev, Anton (NIH/NLM/NCBI) [C] via Cygwin wrote:
> > On Linux, select(2) is really only capable to
> > handle file descriptors numbers up to descriptor number 1023,
> 
> That is not true.  While FD_SETSIZE is defined as a fixed constant,
> Linux kernel does not actually "know" (or care) about it.

$ rpm -q man-pages
man-pages-5.12-2.fc35.noarch
$ man 2 select
[...]
DESCRIPTION
       WARNING: select() can monitor only file descriptors  numbers  that  are
       less  than  FD_SETSIZE (1024)—an unreasonably low limit for many modern
       applications—and this limitation will not change.  All modern  applica‐
       tions  should instead use poll(2) or epoll(7), which do not suffer this
       limitation.
[...]


Corinna

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