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introduce config file for MBR location

pull/1/head
tastytea 2015-09-29 20:17:52 +02:00
parent 85b5f869c6
commit 84ffb6cbd7
1 changed files with 20 additions and 1 deletions
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21
hashboot.sh
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@ -2,7 +2,7 @@
#Hashes all files in /boot to check them during early boot #Hashes all files in /boot to check them during early boot
#Exit codes: 0 = success, 1 = checksum mbr mismatch, 2 = checksum /boot mismatch, #Exit codes: 0 = success, 1 = checksum mbr mismatch, 2 = checksum /boot mismatch,
#3 = checksum mbr/boot mismatch, 4 = not root, 5 = no hasher found, 6 = wrong usage, #3 = checksum mbr/boot mismatch, 4 = not root, 5 = no hasher found, 6 = wrong usage,
#7 = write error, 8 = dd error #7 = write error, 8 = dd error, 9 config file error
VERSION="0.7.1" VERSION="0.7.1"
PATH="/bin:/usr/bin:/sbin:/usr/sbin" PATH="/bin:/usr/bin:/sbin:/usr/sbin"
@ -14,6 +14,7 @@ MBR_TMP="/tmp/mbr"
BACKUP_FILE="/var/cache/boot-backup.tar.gz" BACKUP_FILE="/var/cache/boot-backup.tar.gz"
HASHER="" HASHER=""
BOOT_MOUNTED=0 BOOT_MOUNTED=0
CONFIG_FILE="/etc/hashboot.cfg"
#Umount /boot if we mounted it, exit with given exit code #Umount /boot if we mounted it, exit with given exit code
function die function die
@ -58,6 +59,24 @@ fi
if [ "${1}" == "index" ] if [ "${1}" == "index" ]
then then
#Look for config file and set ${MBR_DEVICE}.
if [ -f ${CONFIG_FILE} ]
then
MBR_DEVICE=$(grep mbr_device ${CONFIG_FILE} | awk '{print $3}')
if [ $? != 0 ]
then
echo "Error reading config file" >&2
die 9
fi
#If not found, create one and ask for ${MBR_DEVICE}
else
echo "Which device contains the MBR? [/dev/sda] "
read -r MBR_DEVICE
[ -z "${MBR_DEVICE}" ] && MBR_DEVICE="/dev/sda"
echo "#Device with the MBR on it" > ${CONFIG_FILE}
echo "mbr_device = ${MBR_DEVICE}"
fi
#Write header #Write header
echo "#hashboot ${VERSION} - Algorithm: $(basename ${HASHER})" > ${DIGEST_FILE} echo "#hashboot ${VERSION} - Algorithm: $(basename ${HASHER})" > ${DIGEST_FILE}
#Write MBR of MBR_DEVICE to ${DIGEST_FILE} #Write MBR of MBR_DEVICE to ${DIGEST_FILE}