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[Bug #557] Rotating default boot? Possible feature
From: |
nobody |
Subject: |
[Bug #557] Rotating default boot? Possible feature |
Date: |
Wed, 11 Sep 2002 12:07:46 -0400 |
=================== BUG #557: LATEST MODIFICATIONS ==================
http://savannah.gnu.org/bugs/?func=detailbug&bug_id=557&group_id=68
Changes by: Henrik Nordstrom <address@hidden>
Date: 2002-Sep-11 16:07 (GMT)
------------------ Additional Follow-up Comments ----------------------------
You should be able to do this with a two stage menu system and using the
savedefault option, without any changes to the existing GRUB code
Create three grub config files, making up a two levels directory structure
-- grub.conf ---
default saved
hiddenmenu
timeout=0
title Alternative 1
configfile (hd0,0)/boot/grub/alt1.conf
title Alternative 2
configfile (hd0,0)/boot/grub/alt2.conf
--- alt1.conf ---
default 2
timeout=10
title Alternative 2
configfile (hd0,0)/boot/grub/alt1.conf
title Alternative 1
kernel ...
savedefault
--- alt2.conf ---
default 2
timeout=10
title Alternative 1
kernel ...
savedefault
title Alternative 2
configfile (hd0,0)/boot/grub/alt2.conf
Regards
Henrik
=================== BUG #557: FULL BUG SNAPSHOT ===================
Submitted by: None Project: GNU GRUB
Submitted on: 2002-Jun-07 00:18
Category: Configuration Severity: Major
Priority: None Bug Group: Feature Request
Resolution: None Assigned to: None
Status: Open Release:
Reproducibility: None Planned Release:
Summary: Rotating default boot? Possible feature
Original Submission: As operating systems are becoming extremely stable these
days (even in the MS world), the only times I actually reboot my computer are
to switch to that /other/ operating system. When I reboot again, it's to get
back into my nice Linux environment.
While I do have Linux as default, would it ever be possible to have GRUB rotate
the default boot between 2 or more partitions? Then, by default, it would boot
into a different operating system from what you just restarted in.
Is this a feature that other people would like to see?
Follow-up Comments
*******************
-------------------------------------------------------
Date: 2002-Sep-11 16:07 By: hno
You should be able to do this with a two stage menu system and using the
savedefault option, without any changes to the existing GRUB code
Create three grub config files, making up a two levels directory structure
-- grub.conf ---
default saved
hiddenmenu
timeout=0
title Alternative 1
configfile (hd0,0)/boot/grub/alt1.conf
title Alternative 2
configfile (hd0,0)/boot/grub/alt2.conf
--- alt1.conf ---
default 2
timeout=10
title Alternative 2
configfile (hd0,0)/boot/grub/alt1.conf
title Alternative 1
kernel ...
savedefault
--- alt2.conf ---
default 2
timeout=10
title Alternative 1
kernel ...
savedefault
title Alternative 2
configfile (hd0,0)/boot/grub/alt2.conf
Regards
Henrik
-------------------------------------------------------
Date: 2002-Jun-16 22:08 By: None
--- stage2/builtins.c.ORIG Sun Jun 16 21:10:05 2002
+++ stage2/builtins.c Sun Jun 16 23:50:24 2002
@@ -3197,7 +3197,8 @@
#if !defined(SUPPORT_DISKLESS) && !defined(GRUB_UTIL)
char buffer[512];
int *entryno_ptr;
-
+ int entryno = 0;
+
/* This command is only useful when you boot an entry from the menu
interface. */
if (! (flags & BUILTIN_SCRIPT))
@@ -3205,6 +3206,12 @@
errnum = ERR_UNRECOGNIZED;
return 1;
}
+
+ /* Get entryno, if specified. Otherwise the current */
+ if (! safe_parse_maxint (&arg, &entryno))
+ {
+ entryno = current_entryno;
+ }
/* Get the geometry of the boot drive (i.e. the disk which contains
this stage2). */
@@ -3231,10 +3238,10 @@
entryno_ptr = (int *) (buffer + STAGE2_SAVED_ENTRYNO);
/* Check if the saved entry number differs from current entry number. */
- if (*entryno_ptr != current_entryno)
+ if (*entryno_ptr != entryno)
{
/* Overwrite the saved entry number. */
- *entryno_ptr = current_entryno;
+ *entryno_ptr = entryno;
/* Save the image in the disk. */
if (! rawwrite (boot_drive, install_second_sector, buffer))
@@ -3256,8 +3263,9 @@
"savedefault",
savedefault_func,
BUILTIN_CMDLINE,
- "savedefault",
- "Save the current entry as the default boot entry."
+ "savedefault [NUM]",
+ "Save the current entry or the entry number NUM "
+ "as the default boot entry."
};
-------------------------------------------------------
Date: 2002-Jun-16 22:05 By: None
Can test with this little patch ? It realize the shiva suggestion.
-------------------------------------------------------
Date: 2002-Jun-11 00:45 By: shiva
I think this could be done by accepting a parameter in savedefault: the name of
the boot section to save as the default for the next boot.
It would also be nice to have a userland utility that sets the default from a
running OS, so you could create desktop shortcuts to boot a different OS next
time.
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http://savannah.gnu.org/bugs/?func=detailbug&bug_id=557&group_id=68
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