| 1 | #!/bin/bash␊ |
| 2 | ␊ |
| 3 | echo "==============================================="␊ |
| 4 | echo "CheckDiskMicrocode: Any existing bootloaders?"␊ |
| 5 | echo "*********************************************"␊ |
| 6 | ␊ |
| 7 | # This script is passed the targetDisk and diskSigCheck.␊ |
| 8 | #␊ |
| 9 | # it then reads the GPTdiskProtectiveMBR and searches for an existing␊ |
| 10 | # Windows bootloader and also for an existing Chameleon stage 0 loader␊ |
| 11 | # which might be better changed depending on whether or not a Windows␊ |
| 12 | # signature is found or not.␊ |
| 13 | #␊ |
| 14 | # The script then exits with the value 0 to indicate that Chameleon stage0␊ |
| 15 | # loader can be written, or 1 to indicate not to write the stage0 loader.␊ |
| 16 | ␊ |
| 17 | if [ "$#" -eq 2 ]; then␊ |
| 18 | ␉targetDisk="$1"␊ |
| 19 | ␉diskSigCheck="$2"␊ |
| 20 | ␉echo "DEBUG: passed argument for targetDisk = $targetDisk"␊ |
| 21 | ␉echo "DEBUG: passed argument for diskSigCheck = $diskSigCheck"␊ |
| 22 | else␊ |
| 23 | ␉echo "Error - wrong number of values passed - Exiting"␊ |
| 24 | ␉exit 9␊ |
| 25 | fi␊ |
| 26 | ␊ |
| 27 | ␊ |
| 28 | # read the first 437 bytes of the MBR␊ |
| 29 | ␊ |
| 30 | mbr437=$( dd 2>/dev/null if="$targetDisk" count=1 | dd 2>/dev/null count=1 bs=437 | perl -ne '@a=split"";for(@a){printf"%02x",ord}' )␊ |
| 31 | #mbr437md5=$( dd 2>/dev/null if="$targetDisk" count=1 | dd 2>/dev/null count=1 bs=437 | md5 )␊ |
| 32 | ␊ |
| 33 | #echo "DEBUG: ${mbr437}"␊ |
| 34 | ␊ |
| 35 | if [ $( echo "${mbr437}" | awk -F0 '{print NF-1}' ) = 874 ]; then␊ |
| 36 | ␉echo "The first 437 bytes of the MBR Disk Sector is blank - Updating"␊ |
| 37 | else␊ |
| 38 | ␉# There is already something on the MBR ␊ |
| 39 | ␊ |
| 40 | ␉# See if a Windows bootloader already exists␊ |
| 41 | ␉# Check bytes 440-443 of the GPTdiskProtectiveMBR for a Windows Disk Signature␊ |
| 42 | ␉windowsloader=$( dd 2>/dev/null if="$targetDisk" count=4 bs=1 | xxd | awk '{print $2$3}' )␊ |
| 43 | ␉if [ "${windowsloader}" == "33c08ed0" ] ; then␊ |
| 44 | ␉␉echo "Found existing Windows Boot Loader so will replace with Chameleon Boot0hfs"␊ |
| 45 | ␉fi␊ |
| 46 | ␊ |
| 47 | ␉# See if a Chameleon stage0 boot file already exists␊ |
| 48 | ␊ |
| 49 | ␉# Note: The checks for Boot0 and Boot0hfs assume the code stays the same.␊ |
| 50 | ␉# if the code changes then the hex values 0b807c and 0a803c used for matching␊ |
| 51 | ␉# need to be checked to see if they are the same or not.␊ |
| 52 | ␊ |
| 53 | ␉stage0type=$( dd 2>/dev/null if="$targetDisk" count=3 bs=1 skip=105 | xxd | awk '{print $2$3}' )␊ |
| 54 | ␉echo ${stage0type}␊ |
| 55 | ␉if [ "${stage0type}" == "0b807c" ]; then␊ |
| 56 | ␉␉echo "Found existing Chameleon stage 0 loader - Boot0hfs"␊ |
| 57 | ␊ |
| 58 | ␉␉# Script CheckDiskSignature.sh returned 0 if a Windows installation was NOT found␊ |
| 59 | ␉␉if [ "$diskSigCheck" == "0" ]; then␊ |
| 60 | ␉␉␉echo "Found no existing Windows installation so will replace stage 0 loader with Boot0"␊ |
| 61 | ␉␉fi␊ |
| 62 | ␉fi␊ |
| 63 | ␊ |
| 64 | ␉if [ "${stage0type}" == "0a803c" ]; then␊ |
| 65 | ␉␉echo "Found existing Chameleon stage 0 loader - Boot0"␊ |
| 66 | ␊ |
| 67 | ␉␉# Script CheckDiskSignature.sh returned 1 if a Windows installation was found␊ |
| 68 | ␉␉if [ "$diskSigCheck" = "1" ]; then␊ |
| 69 | ␉␉␉echo "Found existing Windows installation so will replace stage 0 loader with Boot0hfs"␊ |
| 70 | ␉␉fi␊ |
| 71 | ␉fi␊ |
| 72 | ␊ |
| 73 | ␉if [ "${stage0type}" != "0b807c" ] && [ "${stage0type}" != "0a803c" ] && [ "${windowsloader}" != "33c08ed0" ] ; then␊ |
| 74 | ␉␉echo "Something other than Chameleon or a Windows bootloader was found"␊ |
| 75 | ␉␉test=$(echo "${mbr437}" | awk -F0 '{print NF-1}' )␊ |
| 76 | ␉␉echo "Disk microcode found: ${test} - Preserving."␊ |
| 77 | ␉␉echo "diskupdate is set to false"␊ |
| 78 | ␉␉echo "-----------------------------------------------"␊ |
| 79 | ␉␉echo ""␊ |
| 80 | ␉␉exit 1␊ |
| 81 | ␉fi␊ |
| 82 | fi␊ |
| 83 | ␊ |
| 84 | echo "diskupdate is now set to true."␊ |
| 85 | echo "-----------------------------------------------"␊ |
| 86 | echo ""␊ |
| 87 | ␊ |
| 88 | exit 0␊ |
| 89 | |
