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/**************************************************************************/
[bugs #785] Latest Modifications:
Changes by:
Yoshinori K. Okuji <[EMAIL PROTECTED]>
'Date:
Mon 06/21/2004 at 11:51 (GMT)
What | Removed | Added
---------------------------------------------------------------------------
Planned Release | 0. | 0.96
------------------ Additional Follow-up Comments ----------------------------
This is done in the trunk of the CVS.
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[bugs #785] Full Item Snapshot:
URL: <http://savannah.gnu.org/bugs/?func=detailitem&item_id=785>
Project: GNU GRUB
Submitted by: Jay Berkenbilt
On: Mon 07/01/2002 at 15:17
Category: Configuration
Severity: Major
Priority: 5 - Normal
Item Group: Feature Request
Resolution: Fixed
Assigned to: None
Originator Name:
Originator Email:
Status: Closed
Release: 0.91
Reproducibility: None
Planned Release: 0.96
Summary: would like to change default for only next boot from running system
Original Submission: I have a grub menu with several items on it. I almost always
choose the same one. Occasionally, I want to boot from a different item on the next
boot, but then want to return to by default for subsequent boots. I would like to be
able to override the menu item that will appear as the default on the next boot only
and to be able to do this from my running system before rebooting. This is different
from using savedefault.
For example, once in a while, I boot into Windows instead of Linux. I have a menu
item called "dark" that does this. I want to be able to run bootdark from Linux and
have the system boot into windows the next time I boot. Then, the time after that, I
want it to go back to Linux again.
You could do this with lilo by using lilo -R.
Right now, I'm acheiving this goal by having a bunch of different grub configuration
files that do various setups and installs, and I have a script that changes which grub
configuration file is in use, but this is not clean.
It seems to me that savedefault must be writing something like this somewhere --
perhaps at the beginning of stage2 -- and that it wouldn't be a hard software change
to support this request in a similar fashion.
The main reason for doing this is to be able to control booting remotely in a safe
way. I want to be able to control my next boot without having to be physically
present at the machine. For example, I can boot once into Windows, and then reboot
from there using VNC. I can't run grub from Linux, so the only way to get back once
I've done that (short of messing with active partitions, etc.) is to have the default
switch back upon the next boot.
Thanks for your consideration.
Follow-up Comments
------------------
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Date: Mon 06/21/2004 at 11:51 By: okuji
This is done in the trunk of the CVS.
-------------------------------------------------------
Date: Mon 06/21/2004 at 11:51 By: okuji
This is done in the trunk of the CVS.
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Date: Wed 02/11/2004 at 13:09 By: None
I just wanted to show my support for this feature. I like GRUB far better than LILO,
but at this point I cannot afford to use GRUB on my server (a headless Gentoo machine
that lives roughly 100 miles from where I live) because there is no way to reboot into
a known good kernel if a test kernel panics. With LILO, I just use lilo -R and reboot,
passing panic=30 to the test kernel. If the kernel panics, it reboots after 30 seconds
and LILO knows to boot up the default one next time.
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Date: Sun 02/08/2004 at 01:45 By: None
Just a "me too". I can hardly believe this feature isn't already implemented.
-------------------------------------------------------
Date: Mon 02/02/2004 at 20:28 By: None
I have actually looking for this functionality in Grub lately. I was kind of
interested in setting up a file called nextboot that you could list the next default
option to boot and pull it out of the file. Then the next one would be queued up. I
pulled the source and was looking at it but I am just learning how Grub works.
Joe
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Date: Tue 10/28/2003 at 15:49 By: pixelbeat
Look at the patch in redhats grub srpm
It implements a patch to savedefault to
add te --once option
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Date: Thu 10/23/2003 at 15:52 By: wimpunk
I was looking for the same option... lilo -R is quite handy to test a new kernel on a
server without a display and keyboard.
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Date: Tue 08/12/2003 at 22:25 By: None
An external tool wont be able to reset the default entry number, if the kernel panics.
For remote booting of new kernels, there needs to be a 'one-shot' option, or better
yet it detects a boot-loop, say more than 3 in 5 minutes and boots a fail-back image.
-------------------------------------------------------
Date: Mon 09/16/2002 at 15:44 By: jayberkenbilt
oops -- I made the last comment without logging in. Anyway, the last comment was made
by the original poster....
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Date: Mon 09/16/2002 at 15:42 By: None
Changing the default entry would be one step, but in order for my suggestion to work,
it would have to be changed in such a way that the default would revert back for the
next time, even if the system is booted into an operating system from which GRUB can't
be configured. It would be sufficient to, in addition to being able to override the
next default, to be able to set the default for the next boot in the grub
configuration file. (Right now, the only thing you can do is "safedefault".) If I
could, for example, say that my next boot it is default to the third entry and to set
in my grub configuration item for the third entry that it should restore the default
to the first entry, that would do the trick.
-------------------------------------------------------
Date: Wed 09/11/2002 at 16:18 By: hno
Writing a tool that changes the default entry should not be too hard..
The location where the saved default entry number is located is documented in the
"Internals" section in the GRUB manual.
CC List
-------
CC Address | Comment
------------------------------------+-----------------------------
kronenpj --AT-- netzero --DOT-- net | It would also be nice for this to change the
next boot over a power-cycle, like a lilo -R does. But not strictly necessary if a
memory-only change is easy but a HD change hard.
For detailed info, follow this link:
<http://savannah.gnu.org/bugs/?func=detailitem&item_id=785>
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