mirror of
https://github.com/CloverHackyColor/CloverBootloader.git
synced 2024-12-18 15:27:48 +01:00
110 lines
3.0 KiB
Bash
Executable File
110 lines
3.0 KiB
Bash
Executable File
#!/bin/bash
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#
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# rc functions library for CLOVER
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#
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# © JrCs 2013-2015
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##################### VARIABLES #####################
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# Export variables that can be used in custom scripts
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export DEBUG=${DEBUG:-0}
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declare -r CLOVER_LOG_LOCATION=/Library/Logs/CloverEFI
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export CLOVER_LOG_LOCATION
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##################### FUNCTIONS #####################
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#
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# get value of a nvram key
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#
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GetNVRamKey() {
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# Arguments:
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# $1: nvram key to search (case insensitive)
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# Return:
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# return the value of the nvram key
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# exit code is != 0 if the nvram key wasn't found
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local keyvalue exitCode
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local IFS=$(printf "\t")
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keyvalue=( $(/usr/sbin/nvram -p | /usr/bin/grep -i "^${1}\t*" 2>/dev/null) )
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exitCode=$?
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[[ $exitCode -eq 0 ]] && echo "${keyvalue[1]}"
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return $exitCode
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}
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export -f GetNVRamKey
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#
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# get value of a boot flag
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#
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GetBootFlags() {
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# Arguments:
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# $1: boot flag key to search (case insensitive)
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# Return:
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# return the value of the boot flag
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# exit code is != 0 if the boot flag wasn't found
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local searchKey="$1"
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local exitCode=1
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local bootFlagValue=
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local bootFlags=$(GetNVRamKey 'boot-args')
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# Turn case-insensitive matching temporarily on, if necessary.
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local nocasematchWasOff=0
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shopt nocasematch >/dev/null || nocasematchWasOff=1
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(( nocasematchWasOff )) && shopt -s nocasematch
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for bootFlag in $bootFlags ; do
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#
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# Split the key and value
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#
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local bootFlagKey="${bootFlag%%=*}"
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if [[ "$bootFlagKey" == "$searchKey" ]]; then
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bootFlagValue=
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[[ $bootFlag == *=* ]] && bootFlagValue="${bootFlag#*=}"
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exitCode=0
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break;
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fi
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done
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# Restore state of 'nocasematch' option, if necessary.
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(( nocasematchWasOff )) && shopt -u nocasematch
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echo "$bootFlagValue"
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return $exitCode
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}
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export -f GetBootFlags
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GetDiskGUIDFromDevice() {
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local arg="$1"
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# keep only the device name (remove /dev/ and partition (aka s1))
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local device=$(echo "$arg" | sed -E 's@^.*/?(disk[0-9]*).*@\1@')
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# get the GPT table
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gpt_table=$(dd if=/dev/$device iseek=512 count=72 bs=1 2>/dev/null | xxd -u -ps -c 72)
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# Check if it is a GPT partition table (EFI PART signature)
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[[ ! "${gpt_table:0:16}" == 4546492050415254 ]] && return 1
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printf "%s-%s-%s-%s-%s\n" \
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"${gpt_table:118:2}${gpt_table:116:2}${gpt_table:114:2}${gpt_table:112:2}" \
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"${gpt_table:122:2}${gpt_table:120:2}" \
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"${gpt_table:126:2}${gpt_table:124:2}" \
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"${gpt_table:128:4}" "${gpt_table:132:16}"
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}
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export -f GetDiskGUIDFromDevice
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####################### MAIN #######################
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#
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# Ensure log directory exists
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#
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[[ ! -d "${CLOVER_LOG_LOCATION}" ]] && mkdir -p "${CLOVER_LOG_LOCATION}"
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# Local Variables: #
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# mode: ksh #
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# tab-width: 4 #
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# indent-tabs-mode: nil #
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# End: #
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#
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# vi: set expandtab ts=4 sw=4 sts=4: #
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