Messages in this thread |  | | | Date | Wed, 19 Oct 2005 19:36:53 +0800 | | From | Coywolf Qi Hunt <> | | Subject | Re: number of eth0 device |
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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/
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