Messages in this thread | | | Date | Tue, 12 Feb 2013 00:00:03 +0100 | From | Borislav Petkov <> | Subject | Re: [PATCH 1/2] add helper for highmem checks |
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On Mon, Feb 11, 2013 at 02:46:43PM -0800, H. Peter Anvin wrote: > The X server itself used to do that. Are you saying that wdm is a > *privileged process*?
Nah, it is a simple display manager you start with /etc/init.d/wdm init script. Like the other display managers gdm, kdm, etc.
But it looks like wdm has copied stuff from xdm (from the README):
"Wdm is a modification of XFree86's xdm package for graphically handling authentication and system login. Most of xdm has been preserved (XFree86 4.2.1.1) with the Login interface based on a WINGs implementation using Tom Rothamel's "external greet" interface (see AUTHORS)."
And from looking at the part in the source which does the /dev/mem accesses, it comes from XFree86's source apparently, this is at the beginning of src/wdm/genauth.c:
/* $Xorg: genauth.c,v 1.5 2001/02/09 02:05:40 xorgcvs Exp $ */ /*
Copyright 1988, 1998 The Open Group ...
so this explains why it behaves like the X server in that respect.
-- Regards/Gruss, Boris.
Sent from a fat crate under my desk. Formatting is fine. --
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