grub2/0015-Add-GRUB_DISABLE_UUID.patch

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From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Peter Jones <pjones@redhat.com>
Date: Thu, 4 Sep 2014 16:49:25 -0400
Subject: [PATCH] Add GRUB_DISABLE_UUID.
This will cause "search --fs-uuid --set=root ..." not to be generated by
grub2-mkconfig, and instead simply attempt to use the grub device name
as it understands it.
Signed-off-by: Peter Jones <pjones@redhat.com>
---
docs/grub.texi | 7 +++++++
util/grub-mkconfig.in | 22 +++++++++++++++++++---
util/grub-mkconfig_lib.in | 4 ++--
3 files changed, 28 insertions(+), 5 deletions(-)
diff --git a/docs/grub.texi b/docs/grub.texi
index 2adfa97bee8..2fd32608c01 100644
--- a/docs/grub.texi
+++ b/docs/grub.texi
@@ -1441,6 +1441,13 @@ enable the use of partition UUIDs, set this option to @samp{false}.
If this option is set to @samp{true}, disable the generation of recovery
mode menu entries.
+@item GRUB_DISABLE_UUID
+Normally, @command{grub-mkconfig} will generate menu entries that use
+universally-unique identifiers (UUIDs) to identify various filesystems to
+search for files. This is usually more reliable, but in some cases it may
+not be appropriate. To disable this use of UUIDs, set this option to
+@samp{true}.
+
@item GRUB_VIDEO_BACKEND
If graphical video support is required, either because the @samp{gfxterm}
graphical terminal is in use or because @samp{GRUB_GFXPAYLOAD_LINUX} is set,
diff --git a/util/grub-mkconfig.in b/util/grub-mkconfig.in
index bc5a3f17541..b0a8626dd1c 100644
--- a/util/grub-mkconfig.in
+++ b/util/grub-mkconfig.in
@@ -133,12 +133,12 @@ fi
# Device containing our userland. Typically used for root= parameter.
GRUB_DEVICE="`${grub_probe} --target=device /`"
-GRUB_DEVICE_UUID="`${grub_probe} --device ${GRUB_DEVICE} --target=fs_uuid 2> /dev/null`" || true
-GRUB_DEVICE_PARTUUID="`${grub_probe} --device ${GRUB_DEVICE} --target=partuuid 2> /dev/null`" || true
+GRUB_DEVICE_UUID_GENERATED="`${grub_probe} --device ${GRUB_DEVICE} --target=fs_uuid 2> /dev/null`" || true
+GRUB_DEVICE_PARTUUID_GENERATED="`${grub_probe} --device ${GRUB_DEVICE} --target=partuuid 2> /dev/null`" || true
# Device containing our /boot partition. Usually the same as GRUB_DEVICE.
GRUB_DEVICE_BOOT="`${grub_probe} --target=device /boot`"
-GRUB_DEVICE_BOOT_UUID="`${grub_probe} --device ${GRUB_DEVICE_BOOT} --target=fs_uuid 2> /dev/null`" || true
+GRUB_DEVICE_BOOT_UUID_GENERATED="`${grub_probe} --device ${GRUB_DEVICE_BOOT} --target=fs_uuid 2> /dev/null`" || true
# Filesystem for the device containing our userland. Used for stuff like
# choosing Hurd filesystem module.
@@ -158,6 +158,21 @@ if test -f ${sysconfdir}/default/grub ; then
. ${sysconfdir}/default/grub
fi
+if [ "x$GRUB_DISABLE_UUID" != "xtrue" ]; then
+ if [ -z "$GRUB_DEVICE_UUID" ]; then
+ GRUB_DEVICE_UUID="$GRUB_DEVICE_UUID_GENERATED"
+ fi
+ if [ -z "$GRUB_DEVICE_BOOT_UUID" ]; then
+ GRUB_DEVICE_BOOT_UUID="$GRUB_DEVICE_BOOT_UUID_GENERATED"
+ fi
+ if [ -z "$GRUB_DEVICE_UUID" ]; then
+ GRUB_DEVICE_UUID="$GRUB_DEVICE_UUID_GENERATED"
+ fi
+ if [ -z "$GRUB_DEVICE_PART_UUID" ]; then
+ GRUB_DEVICE_PART_UUID="$GRUB_DEVICE_PART_UUID_GENERATED"
+ fi
+fi
+
# XXX: should this be deprecated at some point?
if [ "x${GRUB_TERMINAL}" != "x" ] ; then
GRUB_TERMINAL_INPUT="${GRUB_TERMINAL}"
@@ -227,6 +242,7 @@ export GRUB_DEFAULT \
GRUB_DISABLE_LINUX_UUID \
GRUB_DISABLE_LINUX_PARTUUID \
GRUB_DISABLE_RECOVERY \
+ GRUB_DISABLE_UUID \
GRUB_VIDEO_BACKEND \
GRUB_GFXMODE \
GRUB_BACKGROUND \
diff --git a/util/grub-mkconfig_lib.in b/util/grub-mkconfig_lib.in
index 0f801cab3e4..1001a12232b 100644
--- a/util/grub-mkconfig_lib.in
+++ b/util/grub-mkconfig_lib.in
@@ -156,7 +156,7 @@ prepare_grub_to_access_device ()
if [ "x$fs_hint" != x ]; then
echo "set root='$fs_hint'"
fi
- if fs_uuid="`"${grub_probe}" --device $@ --target=fs_uuid 2> /dev/null`" ; then
+ if [ "x$GRUB_DISABLE_UUID" != "xtrue" ] && fs_uuid="`"${grub_probe}" --device $@ --target=fs_uuid 2> /dev/null`" ; then
hints="`"${grub_probe}" --device $@ --target=hints_string 2> /dev/null`" || hints=
echo "if [ x\$feature_platform_search_hint = xy ]; then"
echo " search --no-floppy --fs-uuid --set=root ${hints} ${fs_uuid}"
@@ -173,7 +173,7 @@ grub_get_device_id ()
IFS='
'
device="$1"
- if fs_uuid="`"${grub_probe}" --device ${device} --target=fs_uuid 2> /dev/null`" ; then
+ if [ "x$GRUB_DISABLE_UUID" != "xtrue" ] && fs_uuid="`"${grub_probe}" --device ${device} --target=fs_uuid 2> /dev/null`" ; then
echo "$fs_uuid";
else
echo $device |sed 's, ,_,g'