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function uefi_read_data {
# input arg is path/data
local dt
dt=$(cat "$1" | hexdump -e '8/1 "%c""\n"' | tr -dc '[:print:]')
echo $(trim $dt)
}
function uefi_read_attributes {
# input arg is path/attributes
local attr=""
grep -q EFI_VARIABLE_NON_VOLATILE "$1" && attr="${attr}NV,"
grep -q EFI_VARIABLE_BOOTSERVICE_ACCESS "$1" && attr="${attr}BS,"
grep -q EFI_VARIABLE_RUNTIME_ACCESS "$1" && attr="${attr}RT"
attr="(${attr})"
echo "$attr"
}
function efibootmgr_read_var {
# input args are $1 (efi var) and $2 (file $TMP_DIR/efibootmgr_output)
local var
var=$(grep "$1" $2 | cut -d: -f 2- | cut -d* -f2-)
echo "$var"
}
function uefi_extract_bootloader {
# input arg path/data
local dt
dt=$(cat "$1" | tail -1 | tr -cd '[:print:]\n' | cut -d\\ -f2-)
echo "\\$(trim ${dt})"
}
function trim {
local var="$1"
var="${var#"${var%%[![:space:]]*}"}" # remove leading whitespace characters
var="${var%"${var##*[![:space:]]}"}" # remove trailing whitespace characters
echo -n "$var"
}
function build_boot_efi {
local outfile="$1"
local embedded_config=""
local gmkstandalone=""
local gprobe=""
local dirs=()
# modules is the list of modules to load
# If GRUB2_MODULES_UEFI_LOAD is nonempty, it determines what modules to load
local modules=( ${GRUB2_MODULES_UEFI_LOAD:+"${GRUB2_MODULES_UEFI_LOAD[@]}"} )
# Configuration file is optional for image creation.
shift
if [[ -n "$1" ]] ; then
# graft point syntax. $1 will appear as /boot/grub/grub.cfg in the image
embedded_config="/boot/grub/grub.cfg=$1"
shift
# directories that should be accessible by GRUB2 (e.g. because they contain the kernel)
dirs=( ${@:+"$@"} )
fi
if has_binary grub-mkstandalone ; then
gmkstandalone=grub-mkstandalone
elif has_binary grub2-mkstandalone ; then
# At least SUSE systems use 'grub2' prefixed names for GRUB2 programs:
gmkstandalone=grub2-mkstandalone
else
# This build_boot_efi function is only called in 250_populate_efibootimg.sh
# and 100_create_efiboot.sh and 940_grub2_rescue.sh
# only if UEFI is used so that we simply error out here if we cannot make a bootable EFI image of GRUB2
# (normally a function should not exit but return to its caller with a non-zero return code):
Error "Cannot make bootable EFI image of GRUB2 (neither grub-mkstandalone nor grub2-mkstandalone found)"
fi
# Determine what modules need to be loaded in order to access given directories
# (if the list of modules is not overridden by GRUB2_MODULES_UEFI_LOAD)
if (( ${#dirs[@]} )) && ! (( ${#modules[@]} )) ; then
if has_binary grub-probe ; then
gprobe=grub-probe
elif has_binary grub2-probe ; then
# At least SUSE systems use 'grub2' prefixed names for GRUB2 programs:
gprobe=grub2-probe
else
LogPrint "Neither grub-probe nor grub2-probe found"
# Since openSUSE Leap 15.1 things were moved from /usr/lib/grub2/ to /usr/share/grub2/
# cf. https://github.com/rear/rear/issues/2338#issuecomment-594432946
if test /usr/*/grub*/"$GRUB2_IMAGE_FORMAT"/partmap.lst ; then
LogPrint "including all partition modules"
modules=( $( cat /usr/*/grub*/"$GRUB2_IMAGE_FORMAT"/partmap.lst ) )
else
Error "Can not determine partition modules, ${dirs[*]} would be likely inaccessible in GRUB2"
fi
fi
if [ -n "$gprobe" ]; then
# This is unfortunately only a crude approximation of the Grub internal probe_mods() function.
# $gprobe --target=partmap "$p" | sed -e 's/^/part_/' does not always returns part_msdos
# Therefore, we explicit do an echo 'part_msdos' (the sort -u will make sure it is listed only once)
modules=( $( for p in "${dirs[@]}" ; do
$gprobe --target=fs "$p"
$gprobe --target=partmap "$p" | sed -e 's/^/part_/'
echo 'part_msdos'
$gprobe --target=abstraction "$p"
done | sort -u ) )
fi
fi
# grub-mkstandalone needs a .../grub*/$GRUB2_IMAGE_FORMAT/moddep.lst file (cf. https://github.com/rear/rear/issues/1193)
# At least on SUSE systems that is in different 'grub2' directories (cf. https://github.com/rear/rear/issues/2338)
# e.g. on openSUSE Leap 15.0 it is in /usr/lib/grub2/x86_64-efi/moddep.lst
# but on openSUSE Leap 15.1 that was moved to /usr/share/grub2/x86_64-efi/moddep.lst
# and the one in /boot/grub2/x86_64-efi/moddep.lst is a copy of the one in /usr/*/grub2/x86_64-efi/moddep.lst
# so we do not error out if we do not find a /x86_64-efi/moddep.lst file because it could be "anywhere else" in the future
# but we inform the user here in advance about possible problems when there is no /x86_64-efi/moddep.lst file.
# Careful: usr/sbin/rear sets nullglob so that /usr/*/grub*/$GRUB2_IMAGE_FORMAT/moddep.lst gets empty if nothing matches
# and 'test -f' succeeds with empty argument so that we cannot use 'test -f /usr/*/grub*/$GRUB2_IMAGE_FORMAT/moddep.lst'
# also 'test -n' succeeds with empty argument but (fortunately/intentionally?) plain 'test' fails with empty argument.
# Another implicit condition that this 'test' works is that '/usr/*/grub*/$GRUB2_IMAGE_FORMAT/moddep.lst' matches at most one file
# because otherwise e.g. "test /usr/*/grub*/$GRUB2_IMAGE_FORMAT/mod*" where two files moddep.lst and modinfo.sh match
# would falsely fail with "bash: test: ... unary operator expected":
test /usr/*/grub*/"$GRUB2_IMAGE_FORMAT"/moddep.lst || LogPrintError "$gmkstandalone may fail to make a bootable EFI image of GRUB2 (no /usr/*/grub*/$GRUB2_IMAGE_FORMAT/moddep.lst file)"
(( ${#GRUB2_MODULES_UEFI[@]} )) && LogPrint "Installing only ${GRUB2_MODULES_UEFI[*]} modules into $outfile memdisk"
(( ${#modules[@]} )) && LogPrint "GRUB2 modules to load: ${modules[*]}"
if ! $gmkstandalone $v ${GRUB2_MODULES_UEFI:+"--install-modules=${GRUB2_MODULES_UEFI[*]}"} ${modules:+"--modules=${modules[*]}"} -O "$GRUB2_IMAGE_FORMAT" -o $outfile $embedded_config ; then
Error "Failed to make bootable EFI image of GRUB2 (error during $gmkstandalone of $outfile)"
fi
}