change kernel name

change kernel name

[Gaspar Bakos]

Hello,

I have the following question:
If I compile the kernel (2.4.*) and boot it in, then the kernel-release,
as shown by 'uname -r' will be the string that was in the EXTRAVERSION
string from the kernel Makefile.
Is there any way to change this 'identity' of the kernel after the
compilation?
Such as
changekernelname bzImage "newname"

For example I have bzImage.test1, which I copy to bzImage.test2 (and not
complete recompile the kernel with new EXTRAVERSION string), and when
test1 boots in I would like uname to say 2.4.23-test1, and when test2
boots in to say 2.4.23-test2. And in addition to this, of course I copy
/lib/modules/2.4.23-test1 to /lib/modules/2.4.23-test2.

Cheers
Gaspar

Re: change kernel name

[Tomas Szepe]

On Feb-03 2004, Tue, 18:40 -0500
Gaspar Bakos <gbakos@cfa.harvard.edu> wrote:

> Is there any way to change this 'identity' of the kernel after the
> compilation?
> Such as
> changekernelname bzImage "newname"

No.

-- 
Tomas Szepe <szepe@pinerecords.com>

Re: change kernel name

[Richard B. Johnson]

On Tue, 3 Feb 2004, Gaspar Bakos wrote:

> Hello,
>
> I have the following question:
> If I compile the kernel (2.4.*) and boot it in, then the kernel-release,
> as shown by 'uname -r' will be the string that was in the EXTRAVERSION
> string from the kernel Makefile.
> Is there any way to change this 'identity' of the kernel after the
> compilation?
> Such as
> changekernelname bzImage "newname"

Put anything you want in the structure, system_utsname, in your copy of
linux-nn-nn/init/version.c.

Cheers,
Dick Johnson
Penguin : Linux version 2.4.24 on an i686 machine (797.90 BogoMips).
            Note 96.31% of all statistics are fiction.

Re: change kernel name

[Nicholas Berry]

Note the words 'after the compilation'.

Nik


>>> "Richard B. Johnson" <root@chaos.analogic.com> 02/04/04 07:38AM
>>>
On Tue, 3 Feb 2004, Gaspar Bakos wrote:

> Hello,
>
> I have the following question:
> If I compile the kernel (2.4.*) and boot it in, then the
kernel-release,
> as shown by 'uname -r' will be the string that was in the
EXTRAVERSION
> string from the kernel Makefile.
> Is there any way to change this 'identity' of the kernel after the
> compilation?
> Such as
> changekernelname bzImage "newname"

Put anything you want in the structure, system_utsname, in your copy
of
linux-nn-nn/init/version.c.

Cheers,
Dick Johnson
Penguin : Linux version 2.4.24 on an i686 machine (797.90 BogoMips).
            Note 96.31% of all statistics are fiction.


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Re: change kernel name

[Randy.Dunlap]

On Thu, 05 Feb 2004 07:04:26 -0500 "Nicholas Berry" <nikberry@med.umich.edu> wrote:

| Note the words 'after the compilation'.

I think that the other person who answered 'no' was close enough.

BTW, did you say what processor architecture and what kernel
image file format?  If it's a zipped kernel image, changing text
in it is a bit tougher, I guess.  If it's not zipped, almost
anything could change that string (just not make it larger).

--
~Randy

| >>> "Richard B. Johnson" <root@chaos.analogic.com> 02/04/04 07:38AM
| >>>
| On Tue, 3 Feb 2004, Gaspar Bakos wrote:
| 
| > Hello,
| >
| > I have the following question:
| > If I compile the kernel (2.4.*) and boot it in, then the
| kernel-release,
| > as shown by 'uname -r' will be the string that was in the
| EXTRAVERSION
| > string from the kernel Makefile.
| > Is there any way to change this 'identity' of the kernel after the
| > compilation?
| > Such as
| > changekernelname bzImage "newname"
| 
| Put anything you want in the structure, system_utsname, in your copy
| of
| linux-nn-nn/init/version.c.
| 
| Cheers,
| Dick Johnson
| Penguin : Linux version 2.4.24 on an i686 machine (797.90 BogoMips).
|             Note 96.31% of all statistics are fiction.

Re: change kernel name

[Richard B. Johnson]

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Hello all,

It turns out that you can easily change the kernel name, version,
etc., even on a running kernel.

Everything you need is already exported.
A very easy module and test program is attached.

Script started on Thu Feb  5 14:24:20 2004
# ./tester
Usage:
./tester <Item> <string>
Items are SYSNAME, NODENAME, RELEASE, VERSION, MACHINE, DOMAIN
# ./tester SYSNAME foo
Can't open device file, UNAME
Maybe `insmod` the driver?
# insmod unamedrvr.o
# ./tester sysname foo
# uname -a
foo chaos 2.4.24 #1 SMP Wed Feb 4 11:50:33 EST 2004 i686
# ./tester sysname Linux
You have new mail in /var/spool/mail/root
# uname -a
Linux chaos 2.4.24 #1 SMP Wed Feb 4 11:50:33 EST 2004 i686
# ./tester nodename bar
# uname -a
Linux bar 2.4.24 #1 SMP Wed Feb 4 11:50:33 EST 2004 i686
# ./tester node chaos
# uname -a
Linux chaos 2.4.24 #1 SMP Wed Feb 4 11:50:33 EST 2004 i686
# ./tester releas 1.1
You have new mail in /var/spool/mail/root
# uname -a
Linux chaos 1.1 #1 SMP Wed Feb 4 11:50:33 EST 2004 i686
# ./tester r 2.4.24
# uname -a
Linux chaos 2.4.24 #1 SMP Wed Feb 4 11:50:33 EST 2004 i686
# exit
exit
Script done on Thu Feb  5 14:27:04 2004

Have fun!


On Thu, 5 Feb 2004, Randy.Dunlap wrote:

> On Thu, 05 Feb 2004 07:04:26 -0500 "Nicholas Berry" <nikberry@med.umich.edu> wrote:
>
> | Note the words 'after the compilation'.
>
> I think that the other person who answered 'no' was close enough.
>
> BTW, did you say what processor architecture and what kernel
> image file format?  If it's a zipped kernel image, changing text
> in it is a bit tougher, I guess.  If it's not zipped, almost
> anything could change that string (just not make it larger).
>
> --
> ~Randy
>
> | >>> "Richard B. Johnson" <root@chaos.analogic.com> 02/04/04 07:38AM
> | >>>
> | On Tue, 3 Feb 2004, Gaspar Bakos wrote:
> |
> | > Hello,
> | >
> | > I have the following question:
> | > If I compile the kernel (2.4.*) and boot it in, then the
> | kernel-release,
> | > as shown by 'uname -r' will be the string that was in the
> | EXTRAVERSION
> | > string from the kernel Makefile.
> | > Is there any way to change this 'identity' of the kernel after the
> | > compilation?
> | > Such as
> | > changekernelname bzImage "newname"
> |
> | Put anything you want in the structure, system_utsname, in your copy
> | of
> | linux-nn-nn/init/version.c.
> |
> | Cheers,
> | Dick Johnson
> | Penguin : Linux version 2.4.24 on an i686 machine (797.90 BogoMips).
> |             Note 96.31% of all statistics are fiction.
> -
> 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/
>

Cheers,
Dick Johnson
Penguin : Linux version 2.4.24 on an i686 machine (797.90 BogoMips).
            Note 96.31% of all statistics are fiction.


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Re: change kernel name

[Richard B. Johnson]

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On Thu, 5 Feb 2004, Nicholas Berry wrote:

> Note the words 'after the compilation'.
>
> Nik

I read the first nasty-gram weeks ago. The attached code
will allow the kernel name to be changed (and other
`uname` stuff) even when the kernel is running.

Cheers,
Dick Johnson
Penguin : Linux version 2.4.24 on an i686 machine (797.90 BogoMips).
            Note 96.31% of all statistics are fiction.


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Re: change kernel name

[Nicholas Berry]

>>> "Richard B. Johnson" <root@chaos.analogic.com> 02/17/04 8:16 AM >>>
On Thu, 5 Feb 2004, Nicholas Berry wrote:

>> Note the words 'after the compilation'.
>>
>> Nik

>I read the first nasty-gram weeks ago. The attached >code
>will allow the kernel name to be changed (and other
>`uname` stuff) even when the kernel is running.

>Cheers,
>Dick Johnson
>Penguin : Linux version 2.4.24 on an i686 machine (797.90 BogoMips).
>            Note 96.31% of all statistics are fiction.

Note the words 'On Thu, 5 Feb 2004, Nicholas Berry wrote'

So why are you replying to the same 'nast-gram' weeks later?

Nik

Re: change kernel name

[Valdis.Kletnieks]

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On Tue, 17 Feb 2004 12:29:30 EST, Nicholas Berry said:

> >I read the first nasty-gram weeks ago. The attached >code
> >will allow the kernel name to be changed (and other
> >`uname` stuff) even when the kernel is running.

> So why are you replying to the same 'nast-gram' weeks later?

Probably because it took him 2 weeks to get the attached tarball into shape
for public consumption? ;)

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