Re: /dev/pts question

From: H. Peter Anvin (hpa@zytor.com)
Date: Wed Apr 18 2001 - 17:29:01 EST


Followup to: <01041822354404.00617@ElkOS>
By author: elko <elko@home.nl>
In newsgroup: linux.dev.kernel
>
> as I understand, /dev/pts was created
> to make an end to the overload in /dev/<devices>
> and let the kernel put the entries in /dev/pts
> when they are used/needed/installed.
>

You understand wrong. /dev/pts was constructed because the semantics
of BSD pty's is broken (there are issues with permissions.)

> but still, when I enable /dev/pts, I have to
> keep the /dev/<devices> for backward compatibility
> with already installed applications that rely on them.

You should fix your applications.

> would it be possible/sane to make like a
> /dev/* (some sort of a /dev/B-compatible) besides
> /dev/pts, where the kernel `translates' the
> /dev/<device> request to /dev/* and then
> `translate' that to the correct /dev/pts entry ??

Absolutely not. BSD and Unix98 ptys have different semantics, and
absolutely, positively, must be kept separate -- or you have a
security hole in your machine.

Fix your old applications.

        -hpa

-- 
<hpa@transmeta.com> at work, <hpa@zytor.com> in private!
"Unix gives you enough rope to shoot yourself in the foot."
http://www.zytor.com/~hpa/puzzle.txt
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This archive was generated by hypermail 2b29 : Mon Apr 23 2001 - 21:00:29 EST