The grub-mkconfig and 10_linux scripts by default attempt to use a UUID to
set the root kernel command line parameter and the $root GRUB environment
variable.
The former can be disabled by setting the GRUB_DISABLE_LINUX_UUID variable
to "true", but there is currently no way to disable the latter.
The generated grub config uses the search command with the --fs-uuid option
to find the device that has to be set as $root, i.e:
search --no-floppy --fs-uuid --set=root ...
This is usually more reliable but in some cases it may not be appropriate,
so this patch introduces a new GRUB_DISABLE_UUID variable that can be used
to disable searching for the $root device by filesystem UUID.
When disabled, the $root device will be set to the value specified in the
device.map as found by the grub-probe --target=compatibility_hint option.
When setting GRUB_DISABLE_UUID=true, the GRUB_DISABLE_LINUX_UUID and
GRUB_DISABLE_LINUX_PARTUUID variables will also be set to "true" unless
these have been explicitly set to "false".
That way, the GRUB_DISABLE_UUID variable can be used to force using the
device names for both GRUB and Linux.
Signed-off-by: Peter Jones <pjones@redhat.com>
Signed-off-by: Javier Martinez Canillas <javierm@redhat.com>
Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>
Reviewed-by: Nicholas Vinson <nvinson234@gmail.com>
The short form of "--version" that grub-mkconfig accepts is "-V", not "-v".
Fixes Debian bug #935504.
Signed-off-by: Colin Watson <cjwatson@ubuntu.com>
Reviewed-by: Vladimir 'phcoder' Serbinenko <phcoder@gmail.com>
Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>
Honor a symlink when generating configuration by grub-mkconfig, so that
the -o option follows it rather than overwriting it with a regular file.
Signed-off-by: Marcel Kolaja <mkolaja@redhat.com>
Signed-off-by: Javier Martinez Canillas <javierm@redhat.com>
Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>
"--printf" only works with the stat variant provided by coreutils.
With busybox, stat will fail with the following error:
stat: unrecognized option '--printf=%T'
Usage: stat [OPTIONS] FILE...
Signed-off-by: Ovidiu Panait <ovidiu.panait@windriver.com>
Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>
Update grub-mkconfig.in and 10_linux.in to support grub-probe's new
partuuid target. Update grub.texi documentation. The following table
shows how GRUB_DISABLE_LINUX_UUID, GRUB_DISABLE_LINUX_PARTUUID, and
initramfs detection interact:
Initramfs GRUB_DISABLE_LINUX_PARTUUID GRUB_DISABLE_LINUX_UUID Linux Root
detected Set Set ID Method
false false false part UUID
false false true part UUID
false true false dev name
false true true dev name
true false false fs UUID
true false true part UUID
true true false fs UUID
true true true dev name
Note: GRUB_DISABLE_LINUX_PARTUUID and GRUB_DISABLE_LINUX_UUID equate to
'false' when unset or set to any value other than 'true'.
GRUB_DISABLE_LINUX_PARTUUID defaults to 'true'.
Signed-off-by: Nicholas Vinson <nvinson234@gmail.com>
Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>
Add support for multiple, shared, early initrd images. These early
images will be loaded in the order declared, and all will be loaded
before the initrd image.
While many classes of data can be provided by early images, the
immediate use case would be for distributions to provide CPU
microcode to mitigate the Meltdown and Spectre vulnerabilities.
There are two environment variables provided for declaring the early
images.
* GRUB_EARLY_INITRD_LINUX_STOCK is for the distribution declare
images that are provided by the distribution or installed packages.
If undeclared, this will default to a set of common microcode image
names.
* GRUB_EARLY_INITRD_LINUX_CUSTOM is for user created images. User
images will be loaded after the stock images.
These separate configurations allow the distribution and user to
declare different image sets without clobbering each other.
This also makes a minor update to ensure that UUID partition labels
stay disabled when no initrd image is found, even if early images are
present.
This is a continuation of a previous patch published by Christian
Hesse in 2016:
http://lists.gnu.org/archive/html/grub-devel/2016-02/msg00025.html
Down stream Gentoo bug:
https://bugs.gentoo.org/645088
Signed-off-by: Robin H. Johnson <robbat2@gentoo.org>
Signed-off-by: Matthew S. Turnbull <sparky@bluefang-logic.com>
Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>
Grub would notify the user if the new config was invalid, however, it
did not exit properly with exit code 1. Added the proper exit code.
Resolves: rhbz#1252311
Add a new timeout_style environment variable and a corresponding
GRUB_TIMEOUT_STYLE configuration key for grub-mkconfig. This
controls hidden-timeout handling more simply than the previous
arrangements, and pressing any hotkeys associated with menu entries
during the hidden timeout will now boot the corresponding menu entry
immediately.
GRUB_HIDDEN_TIMEOUT=<non-empty> + GRUB_TIMEOUT=<non-zero> now
generates a warning, and if it shows the menu it will do so as if
the second timeout were not present. Other combinations are
translated into reasonable equivalents.
path for fonts ($prefix/fonts).
* grub-core/kern/corecmd.c (grub_core_cmd_insmod): Unify condition
for checking if string is a path.
* grub-core/normal/main.c (features): Add feature_default_font_path.
* util/grub-mkconfig.in: Skip mangling of GRUB_FONT into GRUB_FONT_PATH.
* util/grub.d/00_header.in: Use default directory if possible.
* util/grub-install.in: Install unicode.pf2.
Peter Jones