lkml.org 
[lkml]   [2005]   [Oct]   [19]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: number of eth0 device
On Wed, Oct 19, 2005 at 01:23:48PM +0200, Mathieu Segaud wrote:
> Erik Mouw <erik@harddisk-recovery.com> disait dernièrement que :
>
> > On Wed, Oct 19, 2005 at 12:31:35PM +0200, Karel Kulhavy wrote:
> >> I am looking into Documentation/devices.txt in 2.4.25 and eth0 is not listed
> >> there. If I grep "eth", I get only
> >>
> >> 38 char Myricom PCI Myrinet board
> >> [...]
> >> "This device is used for status query, board control and "user level
> >> packet I/O." This board is also accessible as a standard networking
> >> "eth" device. "
> >>
> >> and then
> >>
> >> /dev/pethr0
> >>
> >> Is eth0 some kind of special device that doesn't have any number
> >> assigned?
> >
> > Yes, there's no such thing as /dev/eth0, network interfaces have their
> > own namespace. Linux uses the defacto standard BSD socket interface for
> > networking, so blame the BSD people for violating the "everything is a
> > file" rule.
>
> well, the way NIC's behave kind of forbids this
> taken from Linux Device Drivers, 3rd Edition, page 497
> "The normal file operations (read, write, and so on) do not make sense
> when applied to network interfaces, so it is not possible to apply the
> Unix ''everything is a file'' approach to them"

I think there're other nodes in /dev on which normal file
operations do not make sense either.
--
Coywolf
-
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2005-10-19 13:39    [W:0.060 / U:0.024 seconds]
©2003-2014 Jasper Spaans. Advertise on this site