Messages in this thread | | | From | Daniel Freedman <> | Date | Thu, 13 Dec 2001 11:03:38 -0500 | Subject | Re: User/kernelspace stuff to set/get kernel variables |
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On Thu, Dec 13, 2001, DevilKin wrote: > Hello > > I've been looking on the web, and couldn't really find what i would want... > > Basically: is it possible to - one way or another - set variables at kernel boot and read those using userspace utilities?
Sorry, I don't know, but see below for possible solution to your problem anyway.
> for instance: i boot my kernel (using any old bootmanager that accepts kernel params) > > > LILO: linux network=dhcp
You might want to familiarize yourself with the following kernel parameter:
"ip=<client-ip>:<server-ip>:<gw-ip>:<netmask>:<hostname>:<device>:<autoconf>"
where most options are obvious, and you'll probably want device to be "eth0" and autoconf to be "dhcp".
HTH,
Daniel
> and later, in the init scripts, i check the value of this variable using some sort of userspace program, and if it happends to be 'dhcp' i'll invoke the dhcp client. > Otherwise i'd just give a static address. > > I have other uses for this, for instance, you want your disks to be FSCK'ed, but don't wanna boot first, or, don't wanna go in single user mode > > > LILO: linux dofsck=true > > > Does something like this exist? Is it implementable in an easy way? (I know a few programming languages, but only little C(++)....) > > Thanks > > > DK > - > 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/
-- Daniel A. Freedman Laboratory for Atomic and Solid State Physics Department of Physics Cornell University - 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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