| 1 | #!/bin/bash␊ |
| 2 | ␊ |
| 3 | echo "==============================================="␊ |
| 4 | echo "CheckGRUBLinuxLoader: Does GRUB or LILO exist?"␊ |
| 5 | echo "**********************************************"␊ |
| 6 | ␊ |
| 7 | # This reads the MBR of the disk in the attempt to find the␊ |
| 8 | # signature for either the GRUB or Linux bootloaders.␊ |
| 9 | # The script returns 1 if either is found, or 0 if none found.␊ |
| 10 | ␊ |
| 11 | # Receives targetdisk: for example, /dev/disk2.␊ |
| 12 | # Receives targetVolume: Volume to install to.␊ |
| 13 | # Receives scriptDir: The location of the main script dir.␊ |
| 14 | ␊ |
| 15 | if [ "$#" -eq 3 ]; then␊ |
| 16 | ␉targetDisk="$1"␊ |
| 17 | ␉targetVolume="$2"␊ |
| 18 | ␉scriptDir="$3"␊ |
| 19 | ␉echo "DEBUG: passed argument for targetDisk = $targetDisk"␊ |
| 20 | ␉echo "DEBUG: passed argument for targetVolume = $targetVolume"␊ |
| 21 | ␉echo "DEBUG: passed argument for scriptDir = $scriptDir"␊ |
| 22 | else␊ |
| 23 | ␉echo "Error - wrong number of values passed"␊ |
| 24 | ␉exit 9␊ |
| 25 | fi␊ |
| 26 | ␊ |
| 27 | diskmicrocodetype[1]="GRUB,47525542"␊ |
| 28 | diskmicrocodetype[2]="LILO,4c494c4f"␊ |
| 29 | ␊ |
| 30 | diskmicrocode=$( 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 | #echo "DEBUG: ${diskmicrocode}"␊ |
| 32 | diskmicrocodetypecounter=0␊ |
| 33 | ␊ |
| 34 | while [ ${diskmicrocodetypecounter} -lt ${#diskmicrocodetype[@]} ]; do␊ |
| 35 | diskmicrocodetypecounter=$(( ${diskmicrocodetypecounter} + 1 ))␊ |
| 36 | diskmicrocodetypeid=${diskmicrocodetype[${diskmicrocodetypecounter}]#*,}␊ |
| 37 | if [ ! "${diskmicrocode}" = "${diskmicrocode/${diskmicrocodetypeid}/}" ]; then␊ |
| 38 | echo "${diskmicrocodetype[${diskmicrocodetypecounter}]%,*} found."␊ |
| 39 | ␉␉exit 1␊ |
| 40 | ␉#else␊ |
| 41 | ␉␉#echo "DEBUG: Didn't find a match for ${diskmicrocodetype[${diskmicrocodetypecounter}]%,*}"␊ |
| 42 | fi␊ |
| 43 | done␊ |
| 44 | ␊ |
| 45 | exit 0 |
