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macOS nvram boot variables, device properties, EFI device paths
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| # joevt Dec 14, 2020 | |
| # https://forums.macrumors.com/threads/documentation-on-all-parameters-for-nvram.2239034/post-28518123 | |
| gfxutilcmd=~/Downloads/gfxutil | |
| alias gfxutil="'$gfxutilcmd'" | |
| nvramp () { | |
| local thename="$1" | |
| local thedata="" # must declare local separately for $? to get the error | |
| thedata="$(nvram $thename)" | |
| local theerr=$? | |
| printf "$(sed -E '/^'$thename'./s///;s/\\/\\\\/g;s/%/\\x/g' <<< "$thedata")" | |
| return $theerr | |
| } | |
| efiguid=8BE4DF61-93CA-11D2-AA0D-00E098032B8C | |
| bootvar () { | |
| local thebootvar=$1 | |
| local thebytes="$(nvramp $efiguid:"$thebootvar" | xxd -p -c 99999; echo ${pipestatus[1]}${PIPESTATUS[0]})" | |
| # typedef struct _EFI_LOAD_OPTION | |
| local theerr=$(sed -n \$p <<< "$thebytes") | |
| if (( !$theerr )); then | |
| thebytes=$(sed \$d <<< "$thebytes") | |
| local theAttributes=$((0x${thebytes:6:2}${thebytes:4:2}${thebytes:2:2}${thebytes:0:2})) | |
| # 0x00000001 LOAD_OPTION_ACTIVE | |
| # 0x00000002 LOAD_OPTION_FORCE_RECONNECT | |
| # 0x00000008 LOAD_OPTION_HIDDEN | |
| # 0x00001F00 LOAD_OPTION_CATEGORY | |
| # 0x00000000 LOAD_OPTION_CATEGORY_BOOT | |
| # 0x00000100 LOAD_OPTION_CATEGORY_APP | |
| local theFilePathListLength=$((0x${thebytes:10:2}${thebytes:8:2})) | |
| local theDescription=$(xxd -p -r <<< "${thebytes:12}" | iconv -f UTF-16LE -t UTF-8 | tr '\0' '\n' | sed -n -E '1p' | tr -d '\n') | |
| local theoffset=$(( 6 + (${#theDescription}+1) * 2 )) | |
| local theFilePathList=${thebytes:$theoffset * 2:$theFilePathListLength*2} | |
| ((theoffset += theFilePathListLength)) | |
| local theOptionalData=${thebytes:$theoffset * 2} | |
| local theOptionalDatastring=$(xxd -p -r <<< "${theOptionalData}" | iconv -f UTF-16LE -t UTF-8 | tr '\0' '\n' | sed -n -E '1p' | tr -d '\n') | |
| echo -n "$thebootvar: $theAttributes, "'"'"$theDescription"'"' | |
| [[ -n $theFilePathList ]] && { | |
| echo -n ', "'; gfxutil "$theFilePathList" | cat; echo -n '"' | |
| } | |
| [[ -n $theOptionalData ]] && echo -n ", "'"'"$theOptionalDatastring"'"' | |
| echo | |
| [[ -n $theOptionalData ]] && { | |
| echo $theOptionalData | xxd -p -r | xxd -o $theoffset -g $((${#theOptionalData}/2)) -c $((${#theOptionalData}/2)) | perl -pe "s/^([0-9A-Fa-f]+: )([0-9A-Fa-f]+) (.*)/ \1\2\n \1\3/" | |
| } | |
| fi | |
| return $theerr | |
| } | |
| setbootvar () { | |
| local thebootvar=$1 | |
| local theAttributes=$2 | |
| local theDescription=$3 | |
| local theFilePathList=$4 | |
| local theOptionalData=$5 | |
| local theAttributesBytes=$(printf "%08x" "$theAttributes") | |
| local theFilePathListBytes=$(gfxutil "$theFilePathList") | |
| local theDescriptionBytes=$(printf "${theDescription}\0" | iconv -f UTF-8 -t UTF-16LE | xxd -p -c 999999) | |
| local theFilePathListLength=$((${#theFilePathListBytes} / 2)) | |
| local theFilePathListLengthBytes=$(printf "%04x" $theFilePathListLength) | |
| local thebytes="${theAttributesBytes:6:2}${theAttributesBytes:4:2}${theAttributesBytes:2:2}${theAttributesBytes:0:2}"\ | |
| "${theFilePathListLengthBytes:2:2}${theFilePathListLengthBytes:0:2}"\ | |
| "${theDescriptionBytes}"\ | |
| "${theFilePathListBytes}"\ | |
| "${theOptionalData}" | |
| sudo nvram "${efiguid}:${thebootvar}=$(sed -E 's/(..)/%\1/g' <<< ${thebytes})" | |
| } | |
| setbootorder () { | |
| IFS='' | |
| local thestring="$*" | |
| sudo nvram "${efiguid}:BootOrder=$(sed -E "s/[Bb]oot//g;s/(..)(..)/%\2%\1/g" <<< $thestring)" | |
| } | |
| setdriverorder () { | |
| IFS='' | |
| local thestring="$*" | |
| sudo nvram "${efiguid}:DriverOrder=$(sed -E "s/[Dd]river//g;s/(..)(..)/%\2%\1/g" <<< $thestring)" | |
| } | |
| dumpallbootvars () { | |
| local BootNext=$(nvramp $efiguid:BootNext 2> /dev/null | xxd -u -p -c 99999 | sed -E 's/(..)(..)/'Boot'\2\1 /g') | |
| echo "BootNext: $BootNext" | |
| echo | |
| for theType in Boot Driver; do | |
| local BootOrder=$(nvramp $efiguid:${theType}Order 2> /dev/null | xxd -u -p -c 99999 | sed -E 's/(..)(..)/'${theType}'\2\1 /g') | |
| echo "${theType}Order: $BootOrder" | |
| IFS=$' ' | |
| for theboot in $(echo $BootOrder); do | |
| bootvar $theboot 2> /dev/null | |
| done | |
| #echo "Search loop" | |
| IFS=$'\n' | |
| local lowboot=-1 | |
| for boot in $( { | |
| eval $(nvramp $efiguid:${theType}Order 2> /dev/null | xxd -u -p -c 99999 | sed -E 's/(..)(..)/echo $((0x\2\1 + 1)):1;echo $((0x\2\1 - 1)):-1;/g'); echo 0:1; echo 128:1; echo $((0xFFFF)):-1 | |
| } | sort -u -t : -k 1n,2n | |
| ) ; do | |
| #echo "checking range $boot" | |
| local inc="${boot#*:}" | |
| local boot=$((${boot%:*})) | |
| local first=1 | |
| while ((1)); do | |
| #echo " checking boot:$boot inc:$inc lowboot:$lowboot" | |
| thebootvar=${theType}$(printf "%04X" $boot) | |
| [[ $BootOrder != *"$thebootvar"* ]] || break | |
| ((boot > lowboot)) || break | |
| ((inc > 0)) && ((lowboot = boot)) | |
| if ((first)); then | |
| echo "Searching: $thebootvar" | |
| first=0 | |
| fi | |
| bootvar $thebootvar 2> /dev/null || break | |
| ((boot+=inc)) | |
| done | |
| ((inc < 0)) && ((lowboot = boot)) | |
| done | |
| echo | |
| done | |
| } | |
| dumpallioregefipaths () { | |
| eval "$( | |
| (ioreg -lw0 -p IODeviceTree; ioreg -lw0) | perl -e ' | |
| $thepath=""; while (<>) { | |
| if ( /^([ |]*)\+\-o (.+) </ ) { $indent = (length $1) / 2; $name = $2; $thepath =~ s|^((/[^/]*){$indent}).*|$1/$name| } | |
| if ( /^[ |]*"([^"]+)" = <(.*7fff0400.*)>/i ) { print $thepath . "/" . $1 . " = <" . $2 . ">\n" } | |
| } | |
| ' | sed -E '/device-properties/d;/(.*) = <(.*)>/s//echo -n "\1 = "; gfxutil \2 | cat; echo/' | |
| )" | |
| } | |
| ioregp () { | |
| ioreg -n "$2" -w0 -p "$1" -k "$3" | sed -nE 's/^[ |]+"'"$3"'" = <(.*)>/\1/p' | xxd -p -r | |
| } | |
| getdeviceprops () { | |
| ioreg -rw0 -p IODeviceTree -n efi | grep device-properties | sed 's/.*<//;s/>.*//;' | xxd -p -r | |
| } | |
| getaaplpathprops () { | |
| # Get device properties from nvram AAPL,PathProperties0000,0001,etc. | |
| # (max 768 per nvram var) | |
| i=0 | |
| while (( 1 )); do | |
| thevar="4D1EDE05-38C7-4A6A-9CC6-4BCCA8B38C14:AAPL,PathProperties$(printf "%04X" $i)" | |
| theval="$(nvram "$thevar" 2> /dev/null)" | |
| [[ -z $theval ]] && break | |
| printf "$(echo -n "$theval" | sed -E '/^'$thevar'./s///;s/\\/\\\\/g;s/%/\\x/g')" | |
| ((i++)) | |
| done | |
| } | |
| setaaplpathprops () { | |
| local thefile="$1" | |
| local theproperties=$(xxd -p -c 99999 "$1") | |
| local thevar=0 | |
| while ((1)); do | |
| local thepart=${theproperties:$thevar*768*2:768*2} | |
| local thename="4D1EDE05-38C7-4A6A-9CC6-4BCCA8B38C14:AAPL,PathProperties"$(printf "%04X" thevar) | |
| if [[ -n $thepart ]]; then | |
| sudo nvram "${thename}=$(sed -E 's/(..)/%\1/g' <<< ${thepart})" | |
| else | |
| nvram "${thename}" > /dev/null 2>&1 && sudo nvram -d "$thename" || break | |
| fi | |
| ((thevar++)) | |
| done | |
| } | |
| getpanic () { | |
| # Get device properties from nvram AAPL,PanicInfo000K,000M,etc. | |
| # (max 768 per nvram var) | |
| i=0 | |
| while (( 1 )); do | |
| thevar="AAPL,PanicInfo000$(printf "%02x" $((0x$(printf 'K' | xxd -p) + i)) | xxd -p -r)" | |
| theval="$(nvram "$thevar" 2> /dev/null)" | |
| [[ -z $theval ]] && break | |
| printf "$(echo -n "$theval" | sed -E '/^'$thevar'./s///;s/\\/\\\\/g;s/%/\\x/g')" | |
| ((i++)) | |
| done | |
| } | |
| getpanic2 () { | |
| # Get device properties from nvram aapl,panic-info | |
| # (max 768 per nvram var) | |
| i=0 | |
| while (( 1 )); do | |
| thevar="aapl,panic-info" | |
| theval="$(nvram "$thevar" 2> /dev/null)" | |
| [[ -z $theval ]] && break | |
| printf "$(echo -n "$theval" | sed -E '/^'$thevar'./s///;s/\\/\\\\/g;s/%/\\x/g')" | |
| ((i++)) | |
| break | |
| done | |
| } |
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