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#!/bin/bash
#
# larch-grub-install - Set up a grub boot
#
#2010.08.09
# $1: path to system to be used as chroot for running grub
# ("/" if no chroot is to be used)
# $2: larch partition, e.g. /dev/sdb1
# $3: 'MBR', if to be installed to MBR
INSTLDIR="$1"
if [ "${INSTLDIR}" = "/" ]; then
INSTLDIR=""
fi
DEVICE="$2"
mbr="$3"
dev=${DEVICE:0:8}
part=${DEVICE:8}
# Convert the device and partion to grub syntax
grubdevice ()
{
## The contents of DEVICE.map look something like this:
#(fd0) /dev/fd0
#(hd0) /dev/hda
#(hd1) /dev/sda
gdev="$( cat ${INSTLDIR}${dmap} | grep "${dev}" | cut -f1 | tr -d "()" )"
gpart=$(( ${part} - 1 ))
gdst="${gdev},${gpart}"
[[ ${mbr} != 'MBR' ]] && gdev=${gdst}
echo "#Installing GRUB to (${gdev}), root (${gst})"
}
dmap=/tmp/DEVICE.map
rm -f ${INSTLDIR}${dmap}
if [ -n "${INSTLDIR}" ]; then
# First try to get a device mapping
mount --bind /dev ${INSTLDIR}/dev
echo "quit" | chroot ${INSTLDIR} grub --no-floppy --device-map=${dmap} --batch
grubdevice
# Now actually install grub
# As far as I can tell, the extra options to grub are not needed here
chroot ${INSTLDIR} grub --batch <<EOT
root (${gdst})
setup (${gdev})
quit
EOT
umount ${INSTLDIR}/dev
else
# First try to get a device mapping
echo "quit" | grub --no-floppy --device-map=${dmap} --batch
grubdevice
# Now actually install grub
# As far as I can tell, the extra options to grub are not needed here
grub --batch <<EOT
root (${gdst})
setup (${gdev})
quit
EOT
fi
rm -f ${INSTLDIR}${dmap}
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