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rear/rear-restore-hybrid-bootloader-RHEL-16864.patch
Pavel Cahyna 92b043d437 Support saving and restoring hybrid BIOS/UEFI bootloader 
Upstream PRs #3145 #3136

Resolves: RHEL-16864
Resolves: RHEL-22812
2024-02-08 22:05:28 +01:00

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diff --git a/usr/share/rear/finalize/Linux-i386/630_install_grub.sh b/usr/share/rear/finalize/Linux-i386/630_install_grub.sh
index f3d9a8204..a0e87e1db 100644
--- a/usr/share/rear/finalize/Linux-i386/630_install_grub.sh
+++ b/usr/share/rear/finalize/Linux-i386/630_install_grub.sh
@@ -1,22 +1,18 @@
# This script is an improvement over the default grub-install '(hd0)'
#
-# However the following issues still exist:
+# However the following issue still exists:
#
# * We don't know what the first disk will be, so we cannot be sure the MBR
-# is written to the correct disk(s). That's why we make all disks bootable.
-#
-# * There is no guarantee that GRUB was the boot loader used originally.
-# One possible attempt would be to save and restore the MBR for each disk,
-# but this does not guarantee a correct boot order,
-# or even a working boot loader config
-# (eg. GRUB stage2 might not be at the exact same location).
+# is written to the correct disk(s). That's why we make all suitable disks bootable.
# Skip if another boot loader is already installed
# (then $NOBOOTLOADER is not a true value cf. finalize/default/010_prepare_checks.sh):
is_true $NOBOOTLOADER || return 0
-# For UEFI systems with grub legacy with should use efibootmgr instead:
-is_true $USING_UEFI_BOOTLOADER && return
+# For UEFI systems with grub legacy with should use efibootmgr instead,
+# but if BOOTLOADER is explicitly set to GRUB, we are on a hybrid (BIOS/UEFI)
+# boot system and we need to install GRUB to MBR as well.
+# Therefore, we don't test $USING_UEFI_BOOTLOADER.
# If the BOOTLOADER variable (read by finalize/default/010_prepare_checks.sh)
# is not "GRUB" (which means GRUB Legacy) skip this script (which is only for GRUB Legacy)
@@ -25,31 +21,27 @@ is_true $USING_UEFI_BOOTLOADER && return
test "GRUB" = "$BOOTLOADER" || return 0
# If the BOOTLOADER variable is "GRUB" (which means GRUB Legacy)
-# do not unconditionally trust that because https://github.com/rear/rear/pull/589
-# reads (excerpt):
-# Problems found:
-# The ..._install_grub.sh checked for GRUB2 which is not part
-# of the first 2048 bytes of a disk - only GRUB was present -
-# thus the check for grub-probe/grub2-probe
-# and https://github.com/rear/rear/commit/079de45b3ad8edcf0e3df54ded53fe955abded3b
-# reads (excerpt):
-# replace grub-install by grub-probe
-# as grub-install also exist in legacy grub
-# so that it seems there are cases where actually GRUB 2 is used
-# but wrongly detected as "GRUB" so that another test is needed
-# to detected if actually GRUB 2 is used and that test is to
-# check if grub-probe or grub2-probe is installed because
-# grub-probe or grub2-probe is only installed in case of GRUB 2
-# and when GRUB 2 is installed we assume GRUB 2 is used as boot loader
-# so that then we skip this script (which is only for GRUB Legacy)
-# because finalize/Linux-i386/660_install_grub2.sh is for installing GRUB 2:
-if type -p grub-probe >&2 || type -p grub2-probe >&2 ; then
- LogPrint "Skip installing GRUB Legacy boot loader because GRUB 2 is installed (grub-probe or grub2-probe exist)."
+# we could in principle trust that and continue because
+# layout/save/default/445_guess_bootloader.sh (where the value has been set)
+# is now able to distinguish between GRUB Legacy and GRUB 2.
+# But, as this code used to support the value "GRUB" for GRUB 2,
+# the user can have BOOTLOADER=GRUB set explicitly in the configuration file
+# and then it overrides the autodetection in layout/save/default/445_guess_bootloader.sh .
+# The user expects this setting to work with GRUB 2, thus for backward compatibility
+# we need to take into accout the possibility that GRUB actually means GRUB 2.
+if is_grub2_installed ; then
+ LogPrint "Skip installing GRUB Legacy boot loader because GRUB 2 is installed."
+ # We have the ErrorIfDeprecated function, but it aborts ReaR by default,
+ # which is not a good thing to do during recovery.
+ # Therefore it better to log a warning and continue.
+ LogPrintError "WARNING: setting BOOTLOADER=GRUB for GRUB 2 is deprecated, set BOOTLOADER=GRUB2 if setting BOOTLOADER explicitly"
return
fi
# The actual work:
LogPrint "Installing GRUB Legacy boot loader:"
+# See above for the reasoning why not to use ErrorIfDeprecated
+LogPrintError "WARNING: support for GRUB Legacy is deprecated"
# Installing GRUB Legacy boot loader requires an executable "grub":
type -p grub >&2 || Error "Cannot install GRUB Legacy boot loader because there is no 'grub' program."
@@ -79,8 +71,10 @@ if [[ -r "$LAYOUT_FILE" && -r "$LAYOUT_DEPS" ]] ; then
for disk in $disks ; do
# Installing grub on an LVM PV will wipe the metadata so we skip those
- # function is_disk_a_pv returns with 1 if disk is a PV
- is_disk_a_pv "$disk" || continue
+ # function is_disk_a_pv returns true if disk is a PV
+ is_disk_a_pv "$disk" && continue
+ # Is the disk suitable for GRUB installation at all?
+ is_disk_grub_candidate "$disk" || continue
# Use first boot partition by default
part=$( echo $bootparts | cut -d' ' -f1 )
diff --git a/usr/share/rear/finalize/Linux-i386/660_install_grub2.sh b/usr/share/rear/finalize/Linux-i386/660_install_grub2.sh
index 58163d622..f42b5bfbe 100644
--- a/usr/share/rear/finalize/Linux-i386/660_install_grub2.sh
+++ b/usr/share/rear/finalize/Linux-i386/660_install_grub2.sh
@@ -38,6 +38,37 @@
# so that after "rear recover" finished he can manually install the bootloader
# as appropriate for his particular system.
+local grub_name
+local grub2_install_failed grub2_install_device
+local source_disk target_disk junk
+local grub2_installed_disks
+local part bootparts
+local disk disks bootdisk
+
+function bios_grub_install ()
+{
+ local grub2_install_device="$1"
+
+ if is_true $USING_UEFI_BOOTLOADER ; then
+ # If running under UEFI, we need to specify the target explicitly, otherwise grub-install thinks
+ # that we are installing the EFI bootloader.
+ if ! chroot $TARGET_FS_ROOT /bin/bash --login -c "$grub_name-install --target=i386-pc $grub2_install_device" ; then
+ LogPrintError "Failed to install GRUB2 for BIOS boot (target i386-pc) on $bootdisk"
+ # purely informational test that may help to explain the reason for the error
+ if ! test -d "$TARGET_FS_ROOT/boot/$grub_name/i386-pc" ; then
+ LogPrintError "GRUB2 module dir for BIOS boot (boot/$grub_name/i386-pc in $TARGET_FS_ROOT) does not exist, is GRUB2 for BIOS (target i386-pc) installed?"
+ fi
+ return 1
+ fi
+ else
+ if ! chroot $TARGET_FS_ROOT /bin/bash --login -c "$grub_name-install $grub2_install_device" ; then
+ LogPrintError "Failed to install GRUB2 on $grub2_install_device"
+ return 1
+ fi
+ fi
+ return 0
+}
+
# Skip if another bootloader was already installed:
# In this case NOBOOTLOADER is not true,
# cf. finalize/default/050_prepare_checks.sh
@@ -45,12 +76,16 @@ is_true $NOBOOTLOADER || return 0
# For UEFI systems with grub2 we should use efibootmgr instead,
# cf. finalize/Linux-i386/670_run_efibootmgr.sh
-is_true $USING_UEFI_BOOTLOADER && return
+# but if BOOTLOADER is explicitly set to GRUB2, we are on a hybrid (BIOS/UEFI)
+# boot system and we need to install GRUB to MBR as well
+if is_true $USING_UEFI_BOOTLOADER && [ "GRUB2" != "$BOOTLOADER" ] ; then
+ return 0
+fi
# Only for GRUB2 - GRUB Legacy will be handled by its own script.
# GRUB2 is detected by testing for grub-probe or grub2-probe which does not exist in GRUB Legacy.
# If neither grub-probe nor grub2-probe is there assume GRUB2 is not there:
-type -p grub-probe || type -p grub2-probe || return 0
+is_grub2_installed || return 0
LogPrint "Installing GRUB2 boot loader..."
@@ -94,7 +129,7 @@ if test "$GRUB2_INSTALL_DEVICES" ; then
else
LogPrint "Installing GRUB2 on $grub2_install_device (specified in GRUB2_INSTALL_DEVICES)"
fi
- if ! chroot $TARGET_FS_ROOT /bin/bash --login -c "$grub_name-install $grub2_install_device" ; then
+ if ! bios_grub_install "$grub2_install_device" ; then
LogPrintError "Failed to install GRUB2 on $grub2_install_device"
grub2_install_failed="yes"
fi
@@ -138,8 +173,8 @@ fi
grub2_installed_disks=()
for disk in $disks ; do
# Installing GRUB2 on an LVM PV will wipe the metadata so we skip those:
- # function is_disk_a_pv returns with 1 if disk is a PV
- is_disk_a_pv "$disk" || continue
+ # function is_disk_a_pv returns true if disk is a PV
+ is_disk_a_pv "$disk" && continue
# Use first boot partition by default:
part=$( echo $bootparts | cut -d' ' -f1 )
@@ -158,6 +193,8 @@ for disk in $disks ; do
# Install GRUB2 on the boot disk if one was found:
if test "$bootdisk" ; then
+ # Is the disk suitable for GRUB installation at all?
+ is_disk_grub_candidate "$bootdisk" || continue
# Continue with the next possible boot disk when GRUB2 was already installed on the current one.
# When there are more disks like /dev/sda and /dev/sdb it can happen that
# for /dev/sda bootdisk=/dev/sda and GRUB2 gets installed on /dev/sda and
@@ -165,7 +202,7 @@ for disk in $disks ; do
# so we avoid that GRUB2 gets needlessly installed two times on the same device:
IsInArray "$bootdisk" "${grub2_installed_disks[@]}" && continue
LogPrint "Found possible boot disk $bootdisk - installing GRUB2 there"
- if chroot $TARGET_FS_ROOT /bin/bash --login -c "$grub_name-install $bootdisk" ; then
+ if bios_grub_install "$bootdisk" ; then
grub2_installed_disks+=( "$bootdisk" )
# In contrast to the above behaviour when GRUB2_INSTALL_DEVICES is specified
# consider it here as a successful bootloader installation when GRUB2
@@ -174,11 +211,14 @@ for disk in $disks ; do
# Continue with the next possible boot disk:
continue
fi
- LogPrintError "Failed to install GRUB2 on possible boot disk $bootdisk"
fi
done
is_true $NOBOOTLOADER || return 0
-LogPrintError "Failed to install GRUB2 - you may have to manually install it"
+if is_true $USING_UEFI_BOOTLOADER ; then
+ LogPrintError "Failed to install GRUB2 for BIOS boot - you may have to manually install it to preserve the hybrid BIOS/UEFI boot support, otherwise only UEFI boot will work"
+else
+ LogPrintError "Failed to install GRUB2 - you may have to manually install it"
+fi
return 1
diff --git a/usr/share/rear/finalize/default/050_prepare_checks.sh b/usr/share/rear/finalize/default/050_prepare_checks.sh
index 1679c9a41..57b44bca4 100644
--- a/usr/share/rear/finalize/default/050_prepare_checks.sh
+++ b/usr/share/rear/finalize/default/050_prepare_checks.sh
@@ -10,10 +10,18 @@
NOBOOTLOADER=1
# Try to read the BOOTLOADER value if /var/lib/rear/recovery/bootloader is not empty.
-# Currently (June 2016) the used BOOTLOADER values (grep for '$BOOTLOADER') are:
+# Currently (February 2024) the used BOOTLOADER values (grep for '$BOOTLOADER') are:
# GRUB for GRUB Legacy
# GRUB2 for GRUB 2
# ELILO for elilo
+# LILO for lilo
+# GRUB2-EFI for GRUB 2, EFI version
+# EFI for any EFI bootloader, dummy value
+# ARM for ARM devices, dummy value
+# ARM-ALLWINNER for Allwinner devices
+# ZIPL for zIPL, on IBM Z (s390x)
+# PPC for any bootloader in the PReP boot partition (can be LILO, YABOOT, GRUB2)
+
local bootloader_file="$VAR_DIR/recovery/bootloader"
# The output is stored in an artificial bash array so that $BOOTLOADER is the first word:
test -s $bootloader_file && BOOTLOADER=( $( grep -v '^[[:space:]]*#' $bootloader_file ) )
diff --git a/usr/share/rear/layout/save/default/445_guess_bootloader.sh b/usr/share/rear/layout/save/default/445_guess_bootloader.sh
index fd5267dcf..b9e636a02 100644
--- a/usr/share/rear/layout/save/default/445_guess_bootloader.sh
+++ b/usr/share/rear/layout/save/default/445_guess_bootloader.sh
@@ -1,7 +1,15 @@
# Determine or guess the used bootloader if not specified by the user
# and save this information into /var/lib/rear/recovery/bootloader
-bootloader_file="$VAR_DIR/recovery/bootloader"
+local bootloader_file="$VAR_DIR/recovery/bootloader"
+
+local sysconfig_bootloader
+local block_device
+local blockd
+local disk_device
+local bootloader_area_strings_file
+local block_size
+local known_bootloader
# When BOOTLOADER is specified use that:
if test "$BOOTLOADER" ; then
@@ -57,39 +65,31 @@ for block_device in /sys/block/* ; do
# Continue guessing the used bootloader by inspecting the first bytes on the next disk:
continue
fi
- # 'Hah!IdontNeedEFI' is the ASCII representation of the official GUID number
- # for a GPT BIOS boot partition which is 21686148-6449-6E6F-744E-656564454649
- # see https://en.wikipedia.org/wiki/BIOS_boot_partition (issue #1752).
- # Use single quotes for 'Hah!IdontNeedEFI' to be on the safe side
- # because with double quotes the ! would cause history expansion if that is enabled
- # (non-interactive shells do not perform history expansion by default but better safe than sorry):
- if grep -q 'Hah!IdontNeedEFI' $bootloader_area_strings_file ; then
- # Because 'Hah!IdontNeedEFI' contains the known bootloader 'EFI'
- # the default code below would falsely guess that 'EFI' is used
- # but actually another non-EFI bootloader is used here
- # cf. https://github.com/rear/rear/issues/1752#issue-303856221
- # so that in the 'Hah!IdontNeedEFI' case only non-EFI bootloaders are tested.
- # IBM Z (s390) uses zipl boot loader for RHEL and Ubuntu
- # cf. https://github.com/rear/rear/issues/2137
- for known_bootloader in GRUB2 GRUB ELILO LILO ZIPL ; do
- if grep -q -i "$known_bootloader" $bootloader_area_strings_file ; then
- LogPrint "Using guessed bootloader '$known_bootloader' (found in first bytes on $disk_device with GPT BIOS boot partition)"
- echo "$known_bootloader" >$bootloader_file
- return
- fi
- done
- # When in the 'Hah!IdontNeedEFI' case no known non-EFI bootloader is found
- # continue guessing the used bootloader by inspecting the first bytes on the next disk
- # because otherwise the default code below would falsely guess that 'EFI' is used
- # cf. https://github.com/rear/rear/pull/1754#issuecomment-383531597
- continue
- fi
# Check the default cases of known bootloaders.
# IBM Z (s390) uses zipl boot loader for RHEL and Ubuntu
# cf. https://github.com/rear/rear/issues/2137
- for known_bootloader in GRUB2-EFI EFI GRUB2 GRUB ELILO LILO ZIPL ; do
+ for known_bootloader in GRUB2 GRUB LILO ZIPL ; do
if grep -q -i "$known_bootloader" $bootloader_area_strings_file ; then
+ # If we find "GRUB" (which means GRUB Legacy)
+ # do not unconditionally trust that because https://github.com/rear/rear/pull/589
+ # reads (excerpt):
+ # Problems found:
+ # The ..._install_grub.sh checked for GRUB2 which is not part
+ # of the first 2048 bytes of a disk - only GRUB was present -
+ # thus the check for grub-probe/grub2-probe
+ # and https://github.com/rear/rear/commit/079de45b3ad8edcf0e3df54ded53fe955abded3b
+ # reads (excerpt):
+ # replace grub-install by grub-probe
+ # as grub-install also exist in legacy grub
+ # so that if actually GRUB 2 is used, the string in the bootloader area
+ # is "GRUB" so that another test is needed to detect if actually GRUB 2 is used.
+ # When GRUB 2 is installed we assume GRUB 2 is used as boot loader.
+ if [ "$known_bootloader" = "GRUB" ] && is_grub2_installed ; then
+ known_bootloader=GRUB2
+ LogPrint "GRUB found in first bytes on $disk_device and GRUB 2 is installed, using GRUB2 as a guessed bootloader for 'rear recover'"
+ else
LogPrint "Using guessed bootloader '$known_bootloader' (found in first bytes on $disk_device)"
+ fi
echo "$known_bootloader" >$bootloader_file
return
fi
@@ -103,6 +103,26 @@ for block_device in /sys/block/* ; do
Log "End of strings in the first bytes on $disk_device"
done
+# No bootloader detected, but we are using UEFI - there is probably an EFI bootloader
+if is_true $USING_UEFI_BOOTLOADER ; then
+ if is_grub2_installed ; then
+ echo "GRUB2-EFI" >$bootloader_file
+ elif test -f /sbin/elilo ; then
+ echo "ELILO" >$bootloader_file
+ else
+ # There is an EFI bootloader, we don't know which one exactly.
+ # The value "EFI" is a bit redundant with USING_UEFI_BOOTLOADER=1,
+ # which already indicates that there is an EFI bootloader. We use it as a placeholder
+ # to not leave $bootloader_file empty.
+ # Note that it is legal to have USING_UEFI_BOOTLOADER=1 and e.g. known_bootloader=GRUB2
+ # (i.e. a non=EFI bootloader). This will happen in BIOS/UEFI hybrid boot scenarios.
+ # known_bootloader=GRUB2 indicates that there is a BIOS bootloader and USING_UEFI_BOOTLOADER=1
+ # indicates that there is also an EFI bootloader. Only the EFI one is being used at this
+ # time, but both will need to be restored.
+ echo "EFI" >$bootloader_file
+ fi
+ return 0
+fi
# Error out when no bootloader was specified or could be autodetected:
Error "Cannot autodetect what is used as bootloader, see default.conf about 'BOOTLOADER'"
diff --git a/usr/share/rear/lib/bootloader-functions.sh b/usr/share/rear/lib/bootloader-functions.sh
index 5402f1da0..7aa40a589 100644
--- a/usr/share/rear/lib/bootloader-functions.sh
+++ b/usr/share/rear/lib/bootloader-functions.sh
@@ -491,6 +491,53 @@ function get_root_disk_UUID {
echo $(mount | grep ' on / ' | awk '{print $1}' | xargs blkid -s UUID -o value)
}
+# Detect whether actually GRUB 2 is installed and that test is to
+# check if grub-probe or grub2-probe is installed because
+# grub-probe or grub2-probe is only installed in case of GRUB 2.
+# Needed because one can't tell the GRUB version by looking at the MBR
+# (both GRUB 2 and GRUB Legacy have the string "GRUB" in their MBR).
+function is_grub2_installed () {
+ if type -p grub-probe >&2 || type -p grub2-probe >&2 ; then
+ Log "GRUB 2 is installed (grub-probe or grub2-probe exist)."
+ return 0
+ else
+ return 1
+ fi
+}
+
+# Determine whether a disk is worth detecting or installing GRUB on
+function is_disk_grub_candidate () {
+ local disk="$1"
+ local disk_partitions part
+ local label flags
+
+ # ToDo : validate $disk (does it even exist? Isn't it write-protected?)
+
+ # Installing grub on an LVM PV will wipe the metadata so we skip those
+ is_disk_a_pv "$disk" && return 1
+
+ label="$( get_disklabel_type "$disk" )" || return 1
+ # We don't care about the SUSE-specific 'gpt_sync_mbr' partition scheme
+ # anymore: https://github.com/rear/rear/pull/3145#discussion_r1481388431
+ if [ "$label" == gpt ] ; then
+ # GPT needs a special BIOS boot partition to store GRUB (BIOS version).
+ # Let's try to find it. It can be recognized as having the bios_grub flag.
+ disk_partitions=( $( get_child_components "$disk" "part" ) )
+ for part in "${disk_partitions[@]}" ; do
+ flags=( $( get_partition_flags "$part" ) )
+ IsInArray bios_grub "${flags[@]}" && return 0 # found!
+ done
+ # If a given GPT-partitioned disk does not contain a BIOS boot partition,
+ # GRUB for BIOS booting can not be installed into its MBR (grub-install errors out).
+ return 1
+ else
+ # Other disklabel types don't need anything special to install GRUB.
+ # The test for the PReP boot partition (finalize/Linux-ppc64le/660_install_grub2.sh)
+ # is a bit similar, but operates on the partition itself, not on the uderlying disk.
+ return 0
+ fi
+}
+
# Create configuration grub
function create_grub2_cfg {
root_uuid=$(get_root_disk_UUID)
diff --git a/usr/share/rear/lib/checklayout-workflow.sh b/usr/share/rear/lib/checklayout-workflow.sh
index 94b70fc06..744ca0be1 100644
--- a/usr/share/rear/lib/checklayout-workflow.sh
+++ b/usr/share/rear/lib/checklayout-workflow.sh
@@ -15,6 +15,10 @@ function WORKFLOW_checklayout () {
SourceStage "layout/precompare"
+ # layout code needs to know whether we are using UEFI (USING_UEFI_BOOTLOADER)
+ # as it also detects the bootloader in use ( layout/save/default/445_guess_bootloader.sh )
+ Source $SHARE_DIR/prep/default/320_include_uefi_env.sh
+
# In case of e.g. BACKUP_URL=file:///mybackup/ automatically exclude the matching component 'fs:/mybackup'
# otherwise 'rear checklayout' would always detect a changed layout with BACKUP_URL=file:///...
# because during 'rear mkrescue/mkbackup' such a component was automatically excluded this way
diff --git a/usr/share/rear/lib/layout-functions.sh b/usr/share/rear/lib/layout-functions.sh
index 4f5b8f6f8..f5fc7538e 100644
--- a/usr/share/rear/lib/layout-functions.sh
+++ b/usr/share/rear/lib/layout-functions.sh
@@ -520,6 +520,33 @@ get_component_type() {
grep -E "^[^ ]+ $1 " $LAYOUT_TODO | cut -d " " -f 3
}
+# Get the disklabel (partition table) type of the disk $1 from the layout file
+# (NOT from the actual disk, so layout file must exist before calling this,
+# and it is useful during recovery even before the disk layout has been recreated)
+function get_disklabel_type () {
+ # from create_disk() in layout/prepare/GNU/Linux/100_include_partition_code.sh
+ local component disk size label junk
+
+ disk=''
+
+ read component disk size label junk < <(grep "^disk $1 " "$LAYOUT_FILE")
+ test $disk || return 1
+
+ echo $label
+}
+
+# Get partition flags from layout (space-separated) of partition given as $1
+function get_partition_flags () {
+ local part disk size pstart name flags partition junk
+
+ while read part disk size pstart name flags partition junk; do
+ if [ "$partition" == "$1" ] ; then
+ echo "$flags" | tr ',' ' '
+ return 0
+ fi
+ done < <(grep "^part " $LAYOUT_FILE)
+}
+
# Function returns 0 when v1 is greater or equal than v2
version_newer() {
local v1list=( ${1//[-.]/ } )
@@ -794,17 +821,17 @@ blkid_label_of_device() {
echo "$label"
}
-# Returns 1 if the device is an LVM physical volume
-# Returns 0 otherwise or if the device doesn't exists
+# Returns true if the device is an LVM physical volume
+# Returns false otherwise or if the device doesn't exists
is_disk_a_pv() {
disk=$1
# Using awk, select the 'lvmdev' line for which $disk is the device (column 3),
# cf. https://github.com/rear/rear/pull/1897
# If exit == 1, then there is such line (so $disk is a PV),
- # otherwise exit with default value '0', which falls through to 'return 0' below.
- awk "\$1 == \"lvmdev\" && \$3 == \"${disk}\" { exit 1 }" "$LAYOUT_FILE" >/dev/null || return 1
- return 0
+ # otherwise exit with default value '0', which falls through to 'return 1' below.
+ awk "\$1 == \"lvmdev\" && \$3 == \"${disk}\" { exit 1 }" "$LAYOUT_FILE" >/dev/null || return 0
+ return 1
}
function is_multipath_path {
diff --git a/usr/share/rear/lib/savelayout-workflow.sh b/usr/share/rear/lib/savelayout-workflow.sh
index 69cda58e9..27bb0a1ad 100644
--- a/usr/share/rear/lib/savelayout-workflow.sh
+++ b/usr/share/rear/lib/savelayout-workflow.sh
@@ -10,6 +10,10 @@ if [[ "$VERBOSE" ]]; then
fi
WORKFLOWS+=( savelayout )
WORKFLOW_savelayout () {
+ # layout code needs to know whether we are using UEFI (USING_UEFI_BOOTLOADER)
+ # as it also detects the bootloader in use ( layout/save/default/445_guess_bootloader.sh )
+ Source $SHARE_DIR/prep/default/320_include_uefi_env.sh
+
#DISKLAYOUT_FILE=$VAR_DIR/layout/disklayout.conf # defined in default.conf now (issue #678)
SourceStage "layout/save"
}
diff --git a/usr/share/rear/prep/GNU/Linux/300_include_grub_tools.sh b/usr/share/rear/prep/GNU/Linux/300_include_grub_tools.sh
index fcf0a5ff6..7d494281a 100644
--- a/usr/share/rear/prep/GNU/Linux/300_include_grub_tools.sh
+++ b/usr/share/rear/prep/GNU/Linux/300_include_grub_tools.sh
@@ -1,8 +1,6 @@
#
# GRUB2 has much more commands than the legacy grub command, including modules
-test -d $VAR_DIR/recovery || mkdir -p $VAR_DIR/recovery
-
# cf. https://github.com/rear/rear/issues/2137
# s390 zlinux does not use grub
# *********************************************************************************
@@ -11,19 +9,8 @@ test -d $VAR_DIR/recovery || mkdir -p $VAR_DIR/recovery
# *********************************************************************************
[ "$ARCH" == "Linux-s390" ] && return 0
-# Because usr/sbin/rear sets 'shopt -s nullglob' the 'echo -n' command
-# outputs nothing if nothing matches the bash globbing pattern '/boot/grub*'
-local grubdir="$( echo -n /boot/grub* )"
-# Use '/boot/grub' as fallback if nothing matches '/boot/grub*'
-test -d "$grubdir" || grubdir='/boot/grub'
-
-# Check if we're using grub or grub2 before doing something.
-if has_binary grub-probe ; then
- grub-probe -t device $grubdir >$VAR_DIR/recovery/bootdisk 2>/dev/null || return 0
-elif has_binary grub2-probe ; then
- grub2-probe -t device $grubdir >$VAR_DIR/recovery/bootdisk 2>/dev/null || return 0
-fi
-
+# It is safe to assume that we are using GRUB and try to add these files to the rescue image
+# even if the assumption is wrong.
# Missing programs in the PROGS array are ignored:
PROGS+=( grub-bios-setup grub2-bios-setup
grub-install grub2-install
diff --git a/usr/share/rear/prep/Linux-s390/305_include_s390_tools.sh b/usr/share/rear/prep/Linux-s390/305_include_s390_tools.sh
index 084ea3104..4451f53d0 100644
--- a/usr/share/rear/prep/Linux-s390/305_include_s390_tools.sh
+++ b/usr/share/rear/prep/Linux-s390/305_include_s390_tools.sh
@@ -1,10 +1,13 @@
#
# s390 zIPL boot loader and grubby for configuring boot loader`
-test -d $VAR_DIR/recovery || mkdir -p $VAR_DIR/recovery
-
-local bootdir="$( echo -n /boot/ )"
-test -d "$bootdir" || $bootdir='/boot/'
+# See the code in prep/GNU/Linux/300_include_grub_tools.sh
+# that sets grubdir via
+# local grubdir="$( echo -n /boot/grub* )"
+# where 'shopt -s nullglob' results nothing when nothing matches
+# but that is not needed here to set a fixed bootdir="/boot"
+# cf. https://github.com/rear/rear/issues/1040#issuecomment-1034890880
+local bootdir="/boot/"
# cf. https://github.com/rear/rear/issues/2137
# findmnt is used the same as grub-probe to find the device where /boot is mounted
@@ -16,7 +19,7 @@ test -d "$bootdir" || $bootdir='/boot/'
# findmnt returns --> /dev/dasda3[/@/.snapshots/1/snapshot]
# use 300_include_grub_tools.sh instead of this file (grub2-probe)
if has_binary findmnt ; then
- findmnt -no SOURCE --target $bootdir >$VAR_DIR/recovery/bootdisk || return 0
+ findmnt -no SOURCE --target $bootdir > /dev/null || return 0
fi
# Missing programs in the PROGS array are ignored:
diff --git a/usr/share/rear/prep/default/320_include_uefi_env.sh b/usr/share/rear/prep/default/320_include_uefi_env.sh
index ea86af4ca..93e59eae5 100644
--- a/usr/share/rear/prep/default/320_include_uefi_env.sh
+++ b/usr/share/rear/prep/default/320_include_uefi_env.sh
@@ -87,7 +87,3 @@ fi
DebugPrint "Found EFI system partition ${esp_proc_mounts_line[0]} on ${esp_proc_mounts_line[1]} type ${esp_proc_mounts_line[2]}"
USING_UEFI_BOOTLOADER=1
LogPrint "Using UEFI Boot Loader for Linux (USING_UEFI_BOOTLOADER=1)"
-
-# Remember the ESP device node in VAR_DIR/recovery/bootdisk:
-echo "${esp_proc_mounts_line[0]}" >$VAR_DIR/recovery/bootdisk
-
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