#! /bin/sh

# Install GRUB on your drive.
# Copyright (C) 1999,2000,2001,2002,2003,2004,2005 Free Software Foundation, Inc.
#
# This file is free software; you can redistribute it and/or modify it
# under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful, but
# WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
# General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin St - Suite 330, Boston, MA 02110, USA.

# This script uses `ofpathname', which is downloadable from
# http://ppc64-utils.ozlabs.org .

# Initialize some variables.
prefix=@prefix@
exec_prefix=@exec_prefix@
sbindir=@sbindir@
datadir=@datadir@
PACKAGE_NAME=@PACKAGE_NAME@
PACKAGE_TARNAME=@PACKAGE_TARNAME@
PACKAGE_VERSION=@PACKAGE_VERSION@
host_cpu=@host_cpu@
host_os=@host_os@
host_vendor=@host_vendor@
pkgdatadir=${datadir}/${PACKAGE_TARNAME}/${host_cpu}-${host_vendor}

grub_mkimage=${sbindir}/grub-mkimage
rootdir=
grub_prefix=/boot/grub
modules=

install_device=
debug=no
update_nvram=yes

ofpathname=/usr/sbin/ofpathname
nvsetenv=/sbin/nvsetenv

# Usage: usage
# Print the usage.
usage () {
    cat <<EOF
Usage: grub-install [OPTION] [install_device]
Install GRUB on your drive.

  -h, --help              print this message and exit
  -v, --version           print the version information and exit
  --modules=MODULES       pre-load specified modules MODULES
  --root-directory=DIR    install GRUB images under the directory DIR
                          instead of the root directory
  --grub-mkimage=FILE     use FILE as grub-mkimage
  --no-nvram              don't update the boot-device NVRAM variable

grub-install copies GRUB images into the DIR/boot directory specfied by
--root-directory, and uses nvsetenv to set the Open Firmware boot-device
variable.

Report bugs to <bug-grub@gnu.org>.
EOF
}

# Check the arguments.
for option in "$@"; do
    case "$option" in
    -h | --help)
	usage
	exit 0 ;;
    -v | --version)
	echo "grub-install (GNU GRUB ${PACKAGE_VERSION})"
	exit 0 ;;
    --modules=*)
	modules=`echo "$option" | sed 's/--modules=//'` ;;
    --root-directory=*)
	rootdir=`echo "$option" | sed 's/--root-directory=//'` ;;
    --grub-mkimage=*)
	grub_mkimage=`echo "$option" | sed 's/--grub-mkimage=//'` ;;
    --no-nvram)
	update_nvram=no ;;
    # This is an undocumented feature...
    --debug)
	debug=yes ;;
    -*)
	echo "Unrecognized option \`$option'" 1>&2
	usage
	exit 1
	;;
    *)
	if test "x$install_device" != x; then
	    echo "More than one install_devices?" 1>&2
	    usage
	    exit 1
	fi
	install_device="${option}" ;;
    esac
done

# If the debugging feature is enabled, print commands.
if test $debug = yes; then
    set -x
fi

# Initialize these directories here, since ROOTDIR was initialized.
bootdir=${rootdir}/boot
grubdir=${bootdir}/grub

set $grub_mkimage dummy
if test -f "$1"; then
    :
else
    echo "$1: Not found." 1>&2
    exit 1
fi

# Find the partition at the right mount point.
install_device=`awk '$2 == '"\"$grubdir\""' { print $1 }' < /proc/mounts`
if test "x$install_device" = x; then
    echo "$grubdir must be a mount point."
    exit 1
fi
# XXX warn on firmware-unreadable filesystems?

# Create the GRUB directory if it is not present.
test -d "$bootdir" || mkdir "$bootdir" || exit 1
test -d "$grubdir" || mkdir "$grubdir" || exit 1

# Copy the GRUB images to the GRUB directory.
for file in ${grubdir}/*.mod ${grubdir}/*.lst ; do
    if test -f $file; then
	rm -f $file || exit 1
    fi
done
for file in ${pkgdatadir}/*.mod ${pkgdatadir}/*.lst ; do
    cp -f $file ${grubdir} || exit 1
done

# Create the core image with all modules, unless user specified a subset.
# XXX probe for partition map and filesystem?
if test "x$modules" = x; then
    modules="$pkgdatadir"/*.mod
fi

# Now perform the installation.
"$grub_mkimage" --output=${grubdir}/grub $modules || exit 1

if test $update_nvram = yes; then
    set $ofpathname dummy
    if test -f "$1"; then
	:
    else
	echo "$1: Not found." 1>&2
	exit 1
    fi

    set $nvsetenv dummy
    if test -f "$1"; then
	:
    else
	echo "$1: Not found." 1>&2
	exit 1
    fi

    # Get the Open Firmware device tree path translation.
    dev=`echo $install_device | sed -e 's/\/dev\///' -e 's/[0-9]\+//'`
    partno=`echo $install_device | sed -e 's/.*[^0-9]\([0-9]\+\)$/\1/'`
    ofpath=`$ofpathname $dev` || {
	echo "Couldn't find Open Firmware device tree path for $dev."
	echo "You will have to set boot-device manually."
	exit 1
    }

    # Point boot-device at the new grub install
    "$nvsetenv" boot-device "$ofpath:$partno,"'\grub' || {
	echo "$nvsetenv failed."
	echo "You will have to set boot-device manually."
	exit 1
    }
fi

# Bye.
exit 0