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|
#!/bin/sh
set -e
# This script sets method "efi" for all fat16/fat32 partitions that
# have the esp flag set.
#FIXME This is not true: it does not care about the filesystem
ARCH="$(archdetect)"
# Prod the kernel to load EFI stuff and mount the efivarfs fs if
# needed
modprobe efivarfs >/dev/null 2>&1 || true
mount -t efivarfs none /sys/firmware/efi/efivars 2>&1 || true
in_efi_mode() {
[ -d /sys/firmware/efi ]
}
if in_efi_mode; then
> /var/lib/partman/efi
else
case $ARCH in
i386/mac|amd64/mac)
# Intel Macs have an EFI partition, regardless of
# whether we're currently booted using BIOS
# compatibility or not (if we are, we won't be able to
# talk to EFI directly).
> /var/lib/partman/efi
;;
*)
rm -f /var/lib/partman/efi
exit 0
;;
esac
fi
. /usr/lib/partman/lib/base.sh
gpt_efi_type=c12a7328-f81f-11d2-ba4b-00a0c93ec93b
gpt_bios_boot_type=21686148-6449-6e6f-744e-656564454649
msdos_efi_type=0xef
NUM_ESP=0
NUM_NOT_ESP=0
for dev in /var/lib/partman/devices/*; do
[ -d "$dev" ] || continue
cd $dev
open_dialog GET_LABEL_TYPE
read_line label_type
close_dialog
if [ "$label_type" = msdos ]; then
DISK_BIOS_BOOT=yes
else
DISK_BIOS_BOOT=no
fi
NON_EFI_THIS_DISK=0
partitions=
open_dialog PARTITIONS
while { read_line num id size type fs path name; [ "$id" ]; }; do
# Build a list of partitions that:
# 1. Will *not* be bios-bootable (e.g. ESP)
# 2. Might be bios-bootable (~anything that's not
# "free space"
if [ "$fs" = fat16 ]; then
partitions="$partitions $id"
elif [ "$fs" = fat32 ] && echo "$name" |
grep -i "^EFI System Partition" >/dev/null; then
partitions="$partitions $id"
elif [ "$label_type" = msdos ] && \
[ "$(blkid -o value -s PART_ENTRY_TYPE -p "$path" 2>/dev/null)" = "$msdos_efi_type" ]; then
partitions="$partitions $id"
elif [ "$label_type" = gpt ] && \
[ "$(blkid -o value -s PART_ENTRY_TYPE -p "$path" 2>/dev/null)" = "$gpt_efi_type" ]; then
partitions="$partitions $id"
elif [ "$label_type" = gpt ] && \
[ "$(blkid -o value -s PART_ENTRY_TYPE -p "$path" 2>/dev/null)" = "$gpt_bios_boot_type" ]; then
# We have a GPT disk with a "BIOS BOOT"
# partition included, so this disk might be
# set up for BIOS boot.
DISK_BIOS_BOOT=yes
log "Disk $dev contains a BIOS boot partition"
partitions="$partitions $id"
else
if [ "$fs" != "free" ]; then
log "Partition $path might be bios-bootable, checking further"
partitions="$partitions $id"
fi
fi
done
close_dialog
# Now look for more details on each of those partitions
for id in $partitions; do
efi=no
open_dialog GET_FLAGS $id
# cannot break here until we've hit close_dialog below
while { read_line flag; [ "$flag" ]; }; do
log "$dev $id has $flag flag"
if [ "$flag" = esp ]; then
efi=yes
fi
done
close_dialog
if [ "$efi" = yes ]; then
# An ESP is clearly not for BIOS use!
log "$dev $id is an ESP"
method=
if [ -f $id/method ]; then
method=$(cat $id/method)
fi
# skip if already seen and changed
if [ "$method" != efi ] && [ ! -e $id/old_efi ]; then
log "efi_debug: set method efi and old_efi on partition $dev $id"
mkdir -p $id
echo efi >$id/method
>$id/old_efi
fi
NUM_ESP=$(($NUM_ESP + 1))
else
# BIOS may well work with anything else
# remaining
log "$dev $id is possibly bootable"
NON_EFI_THIS_DISK=$(($NON_EFI_THIS_DISK + 1))
fi
done
if [ "$DISK_BIOS_BOOT" = "yes" ]; then
log "Disk $dev is BIOS-bootable"
log "Disk $dev has $NON_EFI_THIS_DISK non-ESP partition(s)"
if [ $NON_EFI_THIS_DISK -gt 0 ]; then
NUM_NOT_ESP=$(($NUM_NOT_ESP + 1))
fi
fi
done
log "Found $NUM_ESP ESP(s), $NUM_NOT_ESP BIOS-bootable disk(s) total"
if [ -f /var/lib/partman/uefi_check_done ]; then
log "Found flag file /var/lib/partman/uefi_check_done, not checking further"
else
if in_efi_mode && [ $NUM_ESP = 0 ] && [ $NUM_NOT_ESP -gt 0 ]; then
case $ARCH in
i386/*|amd64/*)
db_input critical partman-efi/non_efi_system || true
db_go || exit 1
db_fset partman-efi/non_efi_system seen true
db_get partman-efi/non_efi_system
if [ "$RET" = false ]; then
log "User chose to ignore UEFI"
touch /var/lib/partman/ignore_uefi
else
log "User chose to continue in UEFI mode"
fi
;;
esac
fi
# We've got this far at least once without triggering the
# check. Flag that so that any further changes we make in this
# d-i session can't trigger a false-positive here.
touch /var/lib/partman/uefi_check_done
log "UEFI check done, wrote flag file /var/lib/partman/uefi_check_done"
fi
|
