78 lines
3.6 KiB
Plaintext
78 lines
3.6 KiB
Plaintext
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#!/bin/sh
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#
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# Copyright © 2019 Rodion Shingarev. All rights reserved.
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# Slight optimizations by PMheart and vit9696.
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#
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if [ ! -x /usr/bin/dirname ] || [ ! -x /usr/sbin/nvram ] || [ ! -x /usr/bin/grep ] || [ ! -x /bin/chmod ] || [ ! -x /usr/bin/sed ] || [ ! -x /usr/bin/base64 ] || [ ! -x /bin/rm ] || [ ! -x /bin/mkdir ] || [ ! -x /bin/cat ] || [ ! -x /bin/dd ] || [ ! -x /usr/bin/stat ] || [ ! -x /usr/libexec/PlistBuddy ] || [ ! -x /usr/sbin/ioreg ] || [ ! -x /usr/bin/xxd ] || [ ! -x /usr/sbin/diskutil ] || [ ! -x /bin/cp ] || [ ! -x /usr/bin/wc ] || [ ! -x /usr/bin/uuidgen ]; then
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abort "Unix environment is broken!"
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fi
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thisDir="$(/usr/bin/dirname "${0}")"
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uuidDump="${thisDir}/$(/usr/bin/uuidgen)"
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if [ "${thisDir}/" = "${uuidDump}" ]; then
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echo "uuidgen returns null!"
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exit 1
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fi
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cd "${thisDir}" || abort "Failed to enter working directory!"
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abort() {
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echo "Fatal error: ${1}"
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/bin/rm -rf "${uuidDump}"
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exit 1
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}
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nvram=/usr/sbin/nvram
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# FIXME: find an nvram key that is mandatory
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if [ -z "$("${nvram}" -x '4D1FDA02-38C7-4A6A-9CC6-4BCCA8B30102:boot-path' | /usr/bin/grep 'xml')" ]; then
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nvram="$(pwd)/nvram.mojave"
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if [ ! -f "${nvram}" ]; then
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abort "${nvram} does NOT exist!"
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elif [ ! -x "${nvram}" ]; then
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abort "${nvram} is not executable!"
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fi
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fi
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getKey() {
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local key="$1"
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"${nvram}" -x "${key}" | /usr/bin/sed '/\<data\>/,/\<\/data\>/!d;//d' | /usr/bin/base64 --decode
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}
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/bin/rm -rf "${uuidDump}"
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/bin/mkdir "${uuidDump}" || abort "Failed to create dump directory!"
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cd "${uuidDump}" || abort "Failed to enter dump directory!"
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"${nvram}" -xp > ./nvram1.plist || abort "Failed to dump nvram!"
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getKey '8BE4DF61-93CA-11D2-AA0D-00E098032B8C:Boot0080' > ./Boot0080
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if [ ! -z "$(/bin/cat ./Boot0080)" ]; then
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getKey 'efi-boot-device-data' > efi-boot-device-data || abort "Failed to retrieve efi-boot-device-data!"
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/bin/dd seek=24 if=efi-boot-device-data of=Boot0080 bs=1 count=$(/usr/bin/stat -f%z efi-boot-device-data) || abort "Failed to fill Boot0080 with efi-boot-device-data!"
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/usr/libexec/PlistBuddy -c "Import Add:8BE4DF61-93CA-11D2-AA0D-00E098032B8C:Boot0080 Boot0080" ./nvram.plist || abort "Failed to import Boot0080!"
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fi
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for key in BootOrder BootCurrent BootNext Boot008{1..3}; do
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getKey "8BE4DF61-93CA-11D2-AA0D-00E098032B8C:${key}" > "${key}"
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if [ ! -z "$(/bin/cat "${key}")" ]; then
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/usr/libexec/PlistBuddy -c "Import Add:8BE4DF61-93CA-11D2-AA0D-00E098032B8C:${key} ${key}" ./nvram.plist || abort "Failed to import ${key} from 8BE4DF61-93CA-11D2-AA0D-00E098032B8C!"
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fi
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done
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/usr/libexec/PlistBuddy -c "Add Version integer 1" ./nvram.plist || abort "Failed to add Version!"
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/usr/libexec/PlistBuddy -c "Add Add:7C436110-AB2A-4BBB-A880-FE41995C9F82 dict" ./nvram.plist || abort "Failed to add dict 7C436110-AB2A-4BBB-A880-FE41995C9F82"
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/usr/libexec/PlistBuddy -c "Merge nvram1.plist Add:7C436110-AB2A-4BBB-A880-FE41995C9F82" ./nvram.plist || abort "Failed to merge with nvram1.plist!"
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UUID="$("${nvram}" 4D1FDA02-38C7-4A6A-9CC6-4BCCA8B30102:boot-path | /usr/bin/sed 's/.*GPT,\([^,]*\),.*/\1/')"
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if [ "$(printf "${UUID}" | /usr/bin/wc -c)" -eq 36 ] && [ -z "$(echo "${UUID}" | /usr/bin/sed 's/[-0-9A-F]//g')" ]; then
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/usr/sbin/diskutil mount "${UUID}" || abort "Failed to mount ${UUID}!"
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/bin/cp ./nvram.plist "$(/usr/sbin/diskutil info "${UUID}" | /usr/bin/sed -n 's/.*Mount Point: *//p')" || abort "Failed to copy nvram.plist!"
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/usr/sbin/diskutil unmount "${UUID}" || abort "Failed to unmount ${UUID}!"
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/bin/rm -rf "${uuidDump}"
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exit 0
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else
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abort "Illegal UUID or unknown loader!"
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fi
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/bin/rm -rf "${uuidDump}"
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