Re: [PATCH v6] close_range.2: new page documenting close_range(2)

[Michael Kerrisk (man-pages)]

Hello Stephen, (and CHristian, please!)


Thanks for your patch revision. I've merged it, and have
done some light editing, but I still have a question:

On 1/23/21 5:11 PM, Stephen Kitt wrote:

[...]

> +.SH ERRORS

> +.TP
> +.B EMFILE
> +The per-process limit on the number of open file descriptors has been reached
> +(see the description of
> +.B RLIMIT_NOFILE
> +in
> +.BR getrlimit (2)).

I think there was already a question about this error, but
I still have a doubt.

A glance at the code tells me that indeed EMFILE can occur.
But how can the reason be because the limit on the number
of open file descriptors has been reached? I mean: no new
FDs are being opened, so how can we go over the limit. I think
the cause of this error is something else, but what is it?

Thanks,

Michael


-- 
Michael Kerrisk
Linux man-pages maintainer; http://www.kernel.org/doc/man-pages/
Linux/UNIX System Programming Training: http://man7.org/training/