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#!/bin/bash
#
# This is a little helper script that tries to convert linux-style device
# names to grub-style. It's not very smart, so it
# probably won't work for more complicated setups.
#
# If it doesn't work for you, try installing grub manually:
#
# # mkdir -p /boot/grub
# # cp /usr/lib/grub/i386-pc/* /boot/grub/
#
# Then start up the 'grub' shell and run something like the following:
#
# grub> root(hd0,0)
# grub> setup(hd0)
#
# The "root" line should point to the partition your kernel is located on,
# /boot if you have a separate boot partition, otherwise your root (/).
#
# The "setup" line tells grub which disc/partition to install the
# bootloader to. In the example above, it will install to the MBR of the
# primary master hard drive.
#
usage() {
echo "usage: install-grub <install_device> [boot_device]"
echo
echo "where <install_device> is the device where Grub will be installed"
echo "and [boot_device] is the partition that contains the /boot"
echo "directory (auto-detected if omitted)"
echo
echo "examples: install-grub /dev/hda"
echo " install-grub /dev/hda /dev/hda1"
echo
exit 0
}
## new install-grub, code was taken from setup script
ROOTDEV=$1
PART_ROOT=$2
VMLINUZ=vmlinuz26
if [ "$ROOTDEV" = "" ]; then
usage
fi
if [ "$PART_ROOT" = "" ]; then
PART_ROOT=$(mount | grep "on /boot type" | cut -d' ' -f 1)
fi
if [ "$PART_ROOT" = "" ]; then
PART_ROOT=$(mount | grep "on / type" | cut -d' ' -f 1)
fi
if [ "$PART_ROOT" = "" ]; then
echo "error: could not determine BOOT_DEVICE, please specify manually" >&2
exit 1
fi
get_grub_map() {
[ -e /tmp/dev.map ] && rm /tmp/dev.map
/sbin/grub --no-floppy --device-map /tmp/dev.map >/tmp/grub.log 2>&1 <<EOF
quit
EOF
}
mapdev() {
partition_flag=0
device_found=0
devs=$(cat /tmp/dev.map | grep -v fd | sed 's/ *\t/ /' | sed ':a;$!N;$!ba;s/\n/ /g')
linuxdevice=$(echo $1 | cut -b1-8)
if [ "$(echo $1 | egrep '[0-9]$')" ]; then
# /dev/hdXY
pnum=$(echo $1 | cut -b9-)
pnum=$(($pnum-1))
partition_flag=1
fi
for dev in $devs
do
if [ "(" = $(echo $dev | cut -b1) ]; then
grubdevice="$dev"
else
if [ "$dev" = "$linuxdevice" ]; then
device_found=1
break
fi
fi
done
if [ "$device_found" = "1" ]; then
if [ "$partition_flag" = "0" ]; then
echo "$grubdevice"
else
grubdevice_stringlen=${#grubdevice}
let grubdevice_stringlen--
grubdevice=$(echo $grubdevice | cut -b1-$grubdevice_stringlen)
echo "$grubdevice,$pnum)"
fi
else
echo " DEVICE NOT FOUND"
fi
}
dogrub() {
get_grub_map
if [ ! -f /boot/grub/menu.lst ]; then
echo "Error: Couldn't find /boot/grub/menu.lst. Is GRUB installed?"
exit 1
fi
# try to auto-configure GRUB...
if [ "$PART_ROOT" != "" -a "$S_GRUB" != "1" ]; then
grubdev=$(mapdev $PART_ROOT)
# look for a separately-mounted /boot partition
bootdev=$(mount | grep /boot | cut -d' ' -f 1)
if [ "$grubdev" != "" -o "$bootdev" != "" ]; then
cp /boot/grub/menu.lst /tmp/.menu.lst
# remove the default entries by truncating the file at our little tag (#-*)
head -n $(cat /tmp/.menu.lst | grep -n '#-\*' | cut -d: -f 1) /tmp/.menu.lst >/boot/grub/menu.lst
rm -f /tmp/.menu.lst
echo "" >>/boot/grub/menu.lst
echo "# (0) Arch Linux" >>/boot/grub/menu.lst
echo "title Arch Linux" >>/boot/grub/menu.lst
subdir=
if [ "$bootdev" != "" ]; then
grubdev=$(mapdev $bootdev)
else
subdir="/boot"
fi
echo "root $grubdev" >>/boot/grub/menu.lst
echo "kernel $subdir/$VMLINUZ root=$PART_ROOT ro" >>/boot/grub/menu.lst
if [ "$VMLINUZ" = "vmlinuz26" ]; then
echo "initrd $subdir/kernel26.img" >>/boot/grub/menu.lst
fi
echo "" >>/boot/grub/menu.lst
# adding fallback/full image
echo "# (1) Arch Linux" >>/boot/grub/menu.lst
echo "title Arch Linux Fallback" >>/boot/grub/menu.lst
echo "root $grubdev" >>/boot/grub/menu.lst
echo "kernel $subdir/$VMLINUZ root=$PART_ROOT ro" >>/boot/grub/menu.lst
if [ "$VMLINUZ" = "vmlinuz26" ]; then
echo "initrd $subdir/kernel26-fallback.img" >>/boot/grub/menu.lst
fi
echo "" >>/boot/grub/menu.lst
fi
fi
echo "Installing the GRUB bootloader..."
cp -a /usr/lib/grub/i386-pc/* /boot/grub/
sync
# freeze xfs filesystems to enable grub installation on xfs filesystems
if [ -x /usr/sbin/xfs_freeze ]; then
/usr/sbin/xfs_freeze -f /boot > /dev/null 2>&1
/usr/sbin/xfs_freeze -f / > /dev/null 2>&1
fi
# look for a separately-mounted /boot partition
bootpart=$(mount | grep /boot | cut -d' ' -f 1)
if [ "$bootpart" = "" ]; then
bootpart=$PART_ROOT
fi
bootpart=$(mapdev $bootpart)
bootdev=$(mapdev $ROOTDEV)
if [ "$bootpart" = "" ]; then
echo "Error: Missing/Invalid root device: $bootpart"
exit 1
fi
/sbin/grub --no-floppy --batch >/tmp/grub.log 2>&1 <<EOF
root $bootpart
setup $bootdev
quit
EOF
cat /tmp/grub.log
# unfreeze xfs filesystems
if [ -x /usr/sbin/xfs_freeze ]; then
/usr/sbin/xfs_freeze -u /boot > /dev/null 2>&1
/usr/sbin/xfs_freeze -u / > /dev/null 2>&1
fi
if grep "Error [0-9]*: " /tmp/grub.log >/dev/null; then
echo "Error installing GRUB. (see /tmp/grub.log for output)"
exit 1
fi
echo "GRUB was successfully installed."
rm -f /tmp/grub.log
exit 0
}
dogrub
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