103 lines
2.7 KiB
Bash
103 lines
2.7 KiB
Bash
#! /bin/sh
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set -e
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# Copyright (C) 2010 Free Software Foundation, Inc.
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# Copyright (C) 2014 CoreOS, Inc.
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#
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# GRUB is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# GRUB is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with GRUB. If not, see <http://www.gnu.org/licenses/>.
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parted=parted
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grubshell=@builddir@/grub-shell
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. "@builddir@/grub-core/modinfo.sh"
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case "${grub_modinfo_target_cpu}-${grub_modinfo_platform}" in
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mips-qemu_mips | mipsel-qemu_mips | i386-qemu | i386-multiboot | i386-coreboot | mipsel-loongson)
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disk=ata0
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;;
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powerpc-ieee1275)
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disk=ieee1275//pci@80000000/mac-io@4/ata-3@20000/disk@0
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# FIXME: QEMU firmware has bugs which prevent it from accessing hard disk w/o recognised label.
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exit 0
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;;
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sparc64-ieee1275)
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disk=ieee1275//pci@1fe\,0/pci-ata@5/ide0@500/disk@0
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# FIXME: QEMU firmware has bugs which prevent it from accessing hard disk w/o recognised label.
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exit 0
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;;
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i386-ieee1275)
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disk=ieee1275/d
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# FIXME: QEMU firmware has bugs which prevent it from accessing hard disk w/o recognised label.
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exit 0
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;;
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mips-arc)
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# FIXME: ARC firmware has bugs which prevent it from accessing hard disk w/o dvh disklabel.
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exit 0 ;;
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mipsel-arc)
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disk=arc/scsi0/disk0/rdisk0
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;;
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*)
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disk=hd0
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;;
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esac
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img1="`mktemp "${TMPDIR:-/tmp}/tmp.XXXXXXXXXX"`" || exit 1
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img2="`mktemp "${TMPDIR:-/tmp}/tmp.XXXXXXXXXX"`" || exit 1
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trap "rm -f '${img1}' '${img2}'" EXIT
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create_disk_image () {
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size=$1
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rm -f "${img1}"
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dd if=/dev/zero of="${img1}" bs=512 count=1 seek=$((size - 1)) status=none
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${parted} -a none -s "${img1}" mklabel gpt
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cp "${img1}" "${img2}"
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}
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wipe_disk_area () {
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sector=$1
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size=$2
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dd if=/dev/zero of="${img2}" bs=512 count=${size} seek=${sector} conv=notrunc status=none
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}
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do_repair () {
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output="`echo "gptrepair ($disk)" | "${grubshell}" --disk="${img2}"`"
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if echo "${output}" | grep ^error; then
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return 1
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fi
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if echo "${output}" | grep -v GPT; then
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echo "Unexpected output ${output}"
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return 1
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fi
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echo "${output}"
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}
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echo "Nothing to repair:"
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create_disk_image 100
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do_repair
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cmp "${img1}" "${img2}"
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echo
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echo "Repair primary (MBR left intact)"
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create_disk_image 100
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wipe_disk_area 1 1
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do_repair
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cmp "${img1}" "${img2}"
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echo
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echo "Repair backup"
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create_disk_image 100
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wipe_disk_area 99 1
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do_repair
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cmp "${img1}" "${img2}"
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echo
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