Re: ioperm is kept on fork

From: H. Peter Anvin
Date: Tue Jun 16 2015 - 13:31:16 EST

On 06/16/2015 09:42 AM, Alex Henrie wrote:
> Hi,
> Could one of you knowledgeable kernel developers comment on
> ? The man pages
> maintainer wants to know when this behavior changed.

I know that I wrote a program which required I/O privileges at some
point, and it called ioperm() in a setuid wrapper. This was in the late
90s. I suspect we'd have to do a bit of a deep dive to double-check;
the old ioperm() code which only supported the ISA port range to avoid
having to copy the bitmap might be good to look at.


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