util/grub-install.in - platform/external/grub - Git at Google

 #! /bin/sh

 # Install GRUB on your drive.
 #   Copyright (C) 1999,2000,2001,2002,2003,2004 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.

 # Initialize some variables.
 prefix=@prefix@
 exec_prefix=@exec_prefix@
 sbindir=@sbindir@
 libdir=@libdir@
 PACKAGE=@PACKAGE@
 VERSION=@VERSION@
 host_cpu=@host_cpu@
 host_os=@host_os@
 host_vendor=@host_vendor@
 pkglibdir=${libdir}/${PACKAGE}/${host_cpu}-${host_vendor}

 grub_shell=${sbindir}/grub
 grub_set_default=${sbindir}/grub-set-default
 log_file=/tmp/grub-install.log.$$
 img_file=/tmp/grub-install.img.$$
 rootdir=
 grub_prefix=/boot/grub

 install_device=
 no_floppy=
 force_lba=
 recheck=no
 debug=no

 # look for secure tempfile creation wrappers on this platform
 if test -x /bin/tempfile; then
     mklog="/bin/tempfile --prefix=grub"
     mkimg="/bin/tempfile --prefix=grub"
 elif test -x /bin/mktemp; then
     mklog="/bin/mktemp /tmp/grub-install.log.XXXXXX"
     mkimg="/bin/mktemp /tmp/grub-install.img.XXXXXX"
 else
     mklog=""
     mkimg=""
 fi

 # 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
   --root-directory=DIR    install GRUB images under the directory DIR
                           instead of the root directory
   --grub-shell=FILE       use FILE as the grub shell
   --no-floppy             do not probe any floppy drive
   --force-lba             force GRUB to use LBA mode even for a buggy
                           BIOS
   --recheck               probe a device map even if it already exists

 INSTALL_DEVICE can be a GRUB device name or a system device filename.

 grub-install copies GRUB images into the DIR/boot directory specfied by
 --root-directory, and uses the grub shell to install grub into the boot
 sector.

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

 # Usage: convert os_device
 # Convert an OS device to the corresponding GRUB drive.
 # This part is OS-specific.
 convert () {
     # First, check if the device file exists.
     if test -e "$1"; then
 	:
     else
 	echo "$1: Not found or not a block device." 1>&2
 	exit 1
     fi

     # Break the device name into the disk part and the partition part.
     case "$host_os" in
     linux*)
 	tmp_disk=`echo "$1" | sed -e 's%\([sh]d[a-z]\)[0-9]*$%\1%' \
 				  -e 's%\(d[0-9]*\)p[0-9]*$%\1%' \
 				  -e 's%\(fd[0-9]*\)$%\1%' \
 				  -e 's%/part[0-9]*$%/disc%' \
 				  -e 's%\(c[0-7]d[0-9]*\).*$%\1%'`
 	tmp_part=`echo "$1" | sed -e 's%.*/[sh]d[a-z]\([0-9]*\)$%\1%' \
 				  -e 's%.*d[0-9]*p%%' \
 				  -e 's%.*/fd[0-9]*$%%' \
 				  -e 's%.*/floppy/[0-9]*$%%' \
 				  -e 's%.*/\(disc\|part\([0-9]*\)\)$%\2%' \
 				  -e 's%.*c[0-7]d[0-9]*p%%'`
 	;;
     gnu*)
 	tmp_disk=`echo "$1" | sed 's%\([sh]d[0-9]*\).*%\1%'`
 	tmp_part=`echo "$1" | sed "s%$tmp_disk%%"` ;;
     freebsd* | kfreebsd*-gnu)
 	tmp_disk=`echo "$1" | sed 's%r\{0,1\}\([saw]d[0-9]*\).*$%r\1%' \
 			    | sed 's%r\{0,1\}\(da[0-9]*\).*$%r\1%'`
 	tmp_part=`echo "$1" \
 	    | sed "s%.*/r\{0,1\}[saw]d[0-9]\(s[0-9]*[a-h]\)%\1%" \
        	    | sed "s%.*/r\{0,1\}da[0-9]\(s[0-9]*[a-h]\)%\1%"`
 	;;
     netbsd* | knetbsd*-gnu)
 	tmp_disk=`echo "$1" | sed 's%r\{0,1\}\([sw]d[0-9]*\).*$%r\1d%' \
 	    | sed 's%r\{0,1\}\(fd[0-9]*\).*$%r\1a%'`
 	tmp_part=`echo "$1" \
 	    | sed "s%.*/r\{0,1\}[sw]d[0-9]\([abe-p]\)%\1%"`
 	;;
     *)
 	echo "grub-install does not support your OS yet." 1>&2
 	exit 1 ;;
     esac

     # Get the drive name.
     tmp_drive=`grep -v '^#' $device_map | grep "$tmp_disk *$" \
 	| sed 's%.*\(([hf]d[0-9][a-g0-9,]*)\).*%\1%'`

     # If not found, print an error message and exit.
     if test "x$tmp_drive" = x; then
 	echo "$1 does not have any corresponding BIOS drive." 1>&2
 	exit 1
     fi

     if test "x$tmp_part" != x; then
 	# If a partition is specified, we need to translate it into the
 	# GRUB's syntax.
 	case "$host_os" in
 	linux*)
 	    echo "$tmp_drive" | sed "s%)$%,`expr $tmp_part - 1`)%" ;;
 	gnu*)
 	    if echo $tmp_part | grep "^s" >/dev/null; then
 		tmp_pc_slice=`echo $tmp_part \
 		    | sed "s%s\([0-9]*\)[a-g]*$%\1%"`
 		tmp_drive=`echo "$tmp_drive" \
 		    | sed "s%)%,\`expr "$tmp_pc_slice" - 1\`)%"`
 	    fi
 	    if echo $tmp_part | grep "[a-g]$" >/dev/null; then
 		tmp_bsd_partition=`echo "$tmp_part" \
 		    | sed "s%[^a-g]*\([a-g]\)$%\1%"`
 		tmp_drive=`echo "$tmp_drive" \
 		    | sed "s%)%,$tmp_bsd_partition)%"`
 	    fi
 	    echo "$tmp_drive" ;;
 	freebsd* | kfreebsd*-gnu)
 	    if echo $tmp_part | grep "^s" >/dev/null; then
 		tmp_pc_slice=`echo $tmp_part \
 		    | sed "s%s\([0-9]*\)[a-h]*$%\1%"`
 		tmp_drive=`echo "$tmp_drive" \
 		    | sed "s%)%,\`expr "$tmp_pc_slice" - 1\`)%"`
 	    fi
 	    if echo $tmp_part | grep "[a-h]$" >/dev/null; then
 		tmp_bsd_partition=`echo "$tmp_part" \
 		    | sed "s%s\{0,1\}[0-9]*\([a-h]\)$%\1%"`
 		tmp_drive=`echo "$tmp_drive" \
 		    | sed "s%)%,$tmp_bsd_partition)%"`
 	    fi
 	    echo "$tmp_drive" ;;
 	netbsd* | knetbsd*-gnu)
 	    if echo $tmp_part | grep "^[abe-p]$" >/dev/null; then
 		tmp_bsd_partition=`echo "$tmp_part" \
 		    | sed "s%\([a-p]\)$%\1%"`
 		tmp_drive=`echo "$tmp_drive" \
 		    | sed "s%)%,$tmp_bsd_partition)%"`
 	    fi
 	    echo "$tmp_drive" ;;
 	esac
     else
 	# If no partition is specified, just print the drive name.
 	echo "$tmp_drive"
     fi
 }

 # Usage: resolve_symlink file
 # Find the real file/device that file points at
 resolve_symlink () {
 	tmp_fname=$1
 	# Resolve symlinks
 	while test -L $tmp_fname; do
 		tmp_new_fname=`ls -al $tmp_fname | sed -n 's%.*-> \(.*\)%\1%p'`
 		if test -z "$tmp_new_fname"; then
 			echo "Unrecognized ls output" 2>&1
 			exit 1
 		fi

 		# Convert relative symlinks
 		case $tmp_new_fname in
 			/*) tmp_fname="$tmp_new_fname"
 			;;
 			*) tmp_fname="`echo $tmp_fname | sed 's%/[^/]*$%%'`/$tmp_new_fname"
 			;;
 		esac
 	done
 	echo "$tmp_fname"
 }

 # Usage: find_device file
 # Find block device on which the file resides.
 find_device () {
     # For now, this uses the program `df' to get the device name, but is
     # this really portable?
     tmp_fname=`df $1/ | sed -n 's%.*\(/dev/[^ 	]*\).*%\1%p'`

     if test -z "$tmp_fname"; then
 	echo "Could not find device for $1" 2>&1
 	exit 1
     fi

 	tmp_fname=`resolve_symlink $tmp_fname`

     echo "$tmp_fname"
 }

 # Check the arguments.
 for option in "$@"; do
     case "$option" in
     -h | --help)
 	usage
 	exit 0 ;;
     -v | --version)
 	echo "grub-install (GNU GRUB ${VERSION})"
 	exit 0 ;;
     --root-directory=*)
 	rootdir=`echo "$option" | sed 's/--root-directory=//'` ;;
     --grub-shell=*)
 	grub_shell=`echo "$option" | sed 's/--grub-shell=//'` ;;
     --no-floppy)
 	no_floppy="--no-floppy" ;;
     --force-lba)
 	force_lba="--force-lba" ;;
     --recheck)
 	recheck=yes ;;
     # This is an undocumented feature...
     --debug)
 	debug=yes ;;
     -*)
 	echo "Unrecognized option \`$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 test "x$install_device" = x; then
     echo "install_device not specified." 1>&2
     usage
     exit 1
 fi

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

 # Initialize these directories here, since ROOTDIR was initialized.
 case "$host_os" in
 netbsd* | openbsd*)
     # Because /boot is used for the boot block in NetBSD and OpenBSD, use /grub
     # instead of /boot/grub.
     grub_prefix=/grub
     bootdir=${rootdir}
     ;;
 *)
     # Use /boot/grub by default.
     bootdir=${rootdir}/boot
     ;;
 esac

 grubdir=${bootdir}/grub
 device_map=${grubdir}/device.map

 # Check if GRUB is installed.
 # This is necessary, because the user can specify "grub --read-only".
 set $grub_shell dummy
 if test -f "$1"; then
     :
 else
     echo "$1: Not found." 1>&2
     exit 1
 fi

 if test -f "$pkglibdir/stage1"; then
     :
 else
     echo "${pkglibdir}/stage1: Not found." 1>&2
     exit 1
 fi

 if test -f "$pkglibdir/stage2"; then
     :
 else
     echo "${pkglibdir}/stage2: Not found." 1>&2
     exit 1
 fi

 # Don't check for *stage1_5, because it is not fatal even if any
 # Stage 1.5 does not exist.

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

 # If --recheck is specified, remove the device map, if present.
 if test $recheck = yes; then
     rm -f $device_map
 fi

 # Create the device map file if it is not present.
 if test -f "$device_map"; then
     :
 else
     # Create a safe temporary file.
     test -n "$mklog" && log_file=`$mklog`

     $grub_shell --batch $no_floppy --device-map=$device_map <<EOF >$log_file
 quit
 EOF
     if grep "Error [0-9]*: " $log_file >/dev/null; then
 	cat $log_file 1>&2
 	exit 1
     fi

     rm -f $log_file
 fi

 # Make sure that there is no duplicated entry.
 tmp=`sed -n '/^([fh]d[0-9]*)/s/\(^(.*)\).*/\1/p' $device_map \
     | sort | uniq -d | sed -n 1p`
 if test -n "$tmp"; then
     echo "The drive $tmp is defined multiple times in the device map $device_map" 1>&2
     exit 1
 fi

 # Check for INSTALL_DEVICE.
 case "$install_device" in
 /dev/*)
     install_device=`resolve_symlink "$install_device"`
     install_drive=`convert "$install_device"`
     # I don't know why, but some shells wouldn't die if exit is
     # called in a function.
     if test "x$install_drive" = x; then
 	exit 1
     fi ;;
 \([hf]d[0-9]*\))
     install_drive="$install_device" ;;
 [hf]d[0-9]*)
     # The GRUB format with no parenthesis.
     install_drive="($install_device)" ;;
 *)
     echo "Format of install_device not recognized." 1>&2
     usage
     exit 1 ;;
 esac

 # Get the root drive.
 root_device=`find_device ${rootdir}`
 bootdir_device=`find_device ${bootdir}`

 # Check if the boot directory is in the same device as the root directory.
 if test "x$root_device" != "x$bootdir_device"; then
     # Perhaps the user has a separate boot partition.
     root_device=$bootdir_device
     grub_prefix="/grub"
 fi

 # Convert the root device to a GRUB drive.
 root_drive=`convert "$root_device"`
 if test "x$root_drive" = x; then
     exit 1
 fi

 # Check if the root directory exists in the same device as the grub
 # directory.
 grubdir_device=`find_device ${grubdir}`

 if test "x$grubdir_device" != "x$root_device"; then
     # For now, cannot deal with this situation.
     cat <<EOF 1>&2
 You must set the root directory by the option --root-directory, because
 $grubdir does not exist in the root device $root_device.
 EOF
     exit 1
 fi

 # Copy the GRUB images to the GRUB directory.
 for file in ${grubdir}/stage1 ${grubdir}/stage2 ${grubdir}/*stage1_5; do
     rm -f $file || exit 1
 done
 for file in \
     ${pkglibdir}/stage1 ${pkglibdir}/stage2 ${pkglibdir}/*stage1_5; do
     cp -f $file ${grubdir} || exit 1
 done

 # Make a default file.
 ${grub_set_default} --root-directory=${rootdir} default

 # Make sure that GRUB reads the same images as the host OS.
 test -n "$mkimg" && img_file=`$mkimg`
 test -n "$mklog" && log_file=`$mklog`

 for file in ${grubdir}/stage1 ${grubdir}/stage2 ${grubdir}/*stage1_5; do
     count=5
     tmp=`echo $file | sed "s|^${grubdir}|${grub_prefix}|"`
     while test $count -gt 0; do
 	$grub_shell --batch $no_floppy --device-map=$device_map <<EOF >$log_file
 dump ${root_drive}${tmp} ${img_file}
 quit
 EOF
 	if grep "Error [0-9]*: " $log_file >/dev/null; then
 	    :
 	elif cmp $file $img_file >/dev/null; then
 	    break
 	fi
 	sleep 1
 	count=`expr $count - 1`
     done
     if test $count -eq 0; then
 	echo "The file $file not read correctly." 1>&2
 	exit 1
     fi
 done

 rm -f $img_file
 rm -f $log_file

 # Create a safe temporary file.
 test -n "$mklog" && log_file=`$mklog`

 # Now perform the installation.
 $grub_shell --batch $no_floppy --device-map=$device_map <<EOF >$log_file
 root $root_drive
 setup $force_lba --stage2=$grubdir/stage2 --prefix=$grub_prefix $install_drive
 quit
 EOF

 if grep "Error [0-9]*: " $log_file >/dev/null || test $debug = yes; then
     cat $log_file 1>&2
     exit 1
 fi

 rm -f $log_file

 # Prompt the user to check if the device map is correct.
 echo "Installation finished. No error reported."
 echo "This is the contents of the device map $device_map."
 echo "Check if this is correct or not. If any of the lines is incorrect,"
 echo "fix it and re-run the script \`grub-install'."
 echo

 cat $device_map

 # Bye.
 exit 0
	#! /bin/sh

	# Install GRUB on your drive.
	# Copyright (C) 1999,2000,2001,2002,2003,2004 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.

	# Initialize some variables.
	prefix=@prefix@
	exec_prefix=@exec_prefix@
	sbindir=@sbindir@
	libdir=@libdir@
	PACKAGE=@PACKAGE@
	VERSION=@VERSION@
	host_cpu=@host_cpu@
	host_os=@host_os@
	host_vendor=@host_vendor@
	pkglibdir=${libdir}/${PACKAGE}/${host_cpu}-${host_vendor}

	grub_shell=${sbindir}/grub
	grub_set_default=${sbindir}/grub-set-default
	log_file=/tmp/grub-install.log.$$
	img_file=/tmp/grub-install.img.$$
	rootdir=
	grub_prefix=/boot/grub

	install_device=
	no_floppy=
	force_lba=
	recheck=no
	debug=no

	# look for secure tempfile creation wrappers on this platform
	if test -x /bin/tempfile; then
	mklog="/bin/tempfile --prefix=grub"
	mkimg="/bin/tempfile --prefix=grub"
	elif test -x /bin/mktemp; then
	mklog="/bin/mktemp /tmp/grub-install.log.XXXXXX"
	mkimg="/bin/mktemp /tmp/grub-install.img.XXXXXX"
	else
	mklog=""
	mkimg=""
	fi

	# 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
	--root-directory=DIR install GRUB images under the directory DIR
	instead of the root directory
	--grub-shell=FILE use FILE as the grub shell
	--no-floppy do not probe any floppy drive
	--force-lba force GRUB to use LBA mode even for a buggy
	BIOS
	--recheck probe a device map even if it already exists

	INSTALL_DEVICE can be a GRUB device name or a system device filename.

	grub-install copies GRUB images into the DIR/boot directory specfied by
	--root-directory, and uses the grub shell to install grub into the boot
	sector.

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

	# Usage: convert os_device
	# Convert an OS device to the corresponding GRUB drive.
	# This part is OS-specific.
	convert () {
	# First, check if the device file exists.
	if test -e "$1"; then
	:
	else
	echo "$1: Not found or not a block device." 1>&2
	exit 1
	fi

	# Break the device name into the disk part and the partition part.
	case "$host_os" in
	linux*)
	tmp_disk=`echo "$1" \| sed -e 's%\([sh]d[a-z]\)[0-9]*$%\1%' \
	-e 's%\(d[0-9]\)p[0-9]$%\1%' \
	-e 's%\(fd[0-9]*\)$%\1%' \
	-e 's%/part[0-9]*$%/disc%' \
	-e 's%\(c[0-7]d[0-9]\).$%\1%'`
	tmp_part=`echo "$1" \| sed -e 's%./[sh]d[a-z]\([0-9]\)$%\1%' \
	-e 's%.d[0-9]p%%' \
	-e 's%./fd[0-9]$%%' \
	-e 's%./floppy/[0-9]$%%' \
	-e 's%./\(disc\\|part\([0-9]\)\)$%\2%' \
	-e 's%.c[0-7]d[0-9]p%%'`
	;;
	gnu*)
	tmp_disk=`echo "$1" \| sed 's%\([sh]d[0-9]\).%\1%'`
	tmp_part=`echo "$1" \| sed "s%$tmp_disk%%"` ;;
	freebsd* \| kfreebsd*-gnu)
	tmp_disk=`echo "$1" \| sed 's%r\{0,1\}\([saw]d[0-9]\).$%r\1%' \
	\| sed 's%r\{0,1\}\(da[0-9]\).$%r\1%'`
	tmp_part=`echo "$1" \
	\| sed "s%./r\{0,1\}[saw]d[0-9]\(s[0-9][a-h]\)%\1%" \
	\| sed "s%./r\{0,1\}da[0-9]\(s[0-9][a-h]\)%\1%"`
	;;
	netbsd* \| knetbsd*-gnu)
	tmp_disk=`echo "$1" \| sed 's%r\{0,1\}\([sw]d[0-9]\).$%r\1d%' \
	\| sed 's%r\{0,1\}\(fd[0-9]\).$%r\1a%'`
	tmp_part=`echo "$1" \
	\| sed "s%.*/r\{0,1\}[sw]d[0-9]\([abe-p]\)%\1%"`
	;;
	*)
	echo "grub-install does not support your OS yet." 1>&2
	exit 1 ;;
	esac

	# Get the drive name.
	tmp_drive=`grep -v '^#' $device_map \| grep "$tmp_disk *$" \
	\| sed 's%.\(([hf]d[0-9][a-g0-9,])\).*%\1%'`

	# If not found, print an error message and exit.
	if test "x$tmp_drive" = x; then
	echo "$1 does not have any corresponding BIOS drive." 1>&2
	exit 1
	fi

	if test "x$tmp_part" != x; then
	# If a partition is specified, we need to translate it into the
	# GRUB's syntax.
	case "$host_os" in
	linux*)
	echo "$tmp_drive" \| sed "s%)$%,`expr $tmp_part - 1`)%" ;;
	gnu*)
	if echo $tmp_part \| grep "^s" >/dev/null; then
	tmp_pc_slice=`echo $tmp_part \
	\| sed "s%s\([0-9]\)[a-g]$%\1%"`
	tmp_drive=`echo "$tmp_drive" \
	\| sed "s%)%,\`expr "$tmp_pc_slice" - 1\`)%"`
	fi
	if echo $tmp_part \| grep "[a-g]$" >/dev/null; then
	tmp_bsd_partition=`echo "$tmp_part" \
	\| sed "s%[^a-g]*\([a-g]\)$%\1%"`
	tmp_drive=`echo "$tmp_drive" \
	\| sed "s%)%,$tmp_bsd_partition)%"`
	fi
	echo "$tmp_drive" ;;
	freebsd* \| kfreebsd*-gnu)
	if echo $tmp_part \| grep "^s" >/dev/null; then
	tmp_pc_slice=`echo $tmp_part \
	\| sed "s%s\([0-9]\)[a-h]$%\1%"`
	tmp_drive=`echo "$tmp_drive" \
	\| sed "s%)%,\`expr "$tmp_pc_slice" - 1\`)%"`
	fi
	if echo $tmp_part \| grep "[a-h]$" >/dev/null; then
	tmp_bsd_partition=`echo "$tmp_part" \
	\| sed "s%s\{0,1\}[0-9]*\([a-h]\)$%\1%"`
	tmp_drive=`echo "$tmp_drive" \
	\| sed "s%)%,$tmp_bsd_partition)%"`
	fi
	echo "$tmp_drive" ;;
	netbsd* \| knetbsd*-gnu)
	if echo $tmp_part \| grep "^[abe-p]$" >/dev/null; then
	tmp_bsd_partition=`echo "$tmp_part" \
	\| sed "s%\([a-p]\)$%\1%"`
	tmp_drive=`echo "$tmp_drive" \
	\| sed "s%)%,$tmp_bsd_partition)%"`
	fi
	echo "$tmp_drive" ;;
	esac
	else
	# If no partition is specified, just print the drive name.
	echo "$tmp_drive"
	fi
	}

	# Usage: resolve_symlink file
	# Find the real file/device that file points at
	resolve_symlink () {
	tmp_fname=$1
	# Resolve symlinks
	while test -L $tmp_fname; do
	tmp_new_fname=`ls -al $tmp_fname \| sed -n 's%.-> \(.\)%\1%p'`
	if test -z "$tmp_new_fname"; then
	echo "Unrecognized ls output" 2>&1
	exit 1
	fi

	# Convert relative symlinks
	case $tmp_new_fname in
	/*) tmp_fname="$tmp_new_fname"
	;;
	) tmp_fname="`echo $tmp_fname \| sed 's%/[^/]$%%'`/$tmp_new_fname"
	;;
	esac
	done
	echo "$tmp_fname"
	}

	# Usage: find_device file
	# Find block device on which the file resides.
	find_device () {
	# For now, this uses the program `df' to get the device name, but is
	# this really portable?
	tmp_fname=`df $1/ \| sed -n 's%.\(/dev/[^ ]\).*%\1%p'`

	if test -z "$tmp_fname"; then
	echo "Could not find device for $1" 2>&1
	exit 1
	fi

	tmp_fname=`resolve_symlink $tmp_fname`

	echo "$tmp_fname"
	}

	# Check the arguments.
	for option in "$@"; do
	case "$option" in
	-h \| --help)
	usage
	exit 0 ;;
	-v \| --version)
	echo "grub-install (GNU GRUB ${VERSION})"
	exit 0 ;;
	--root-directory=*)
	rootdir=`echo "$option" \| sed 's/--root-directory=//'` ;;
	--grub-shell=*)
	grub_shell=`echo "$option" \| sed 's/--grub-shell=//'` ;;
	--no-floppy)
	no_floppy="--no-floppy" ;;
	--force-lba)
	force_lba="--force-lba" ;;
	--recheck)
	recheck=yes ;;
	# This is an undocumented feature...
	--debug)
	debug=yes ;;
	-*)
	echo "Unrecognized option \`$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 test "x$install_device" = x; then
	echo "install_device not specified." 1>&2
	usage
	exit 1
	fi

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

	# Initialize these directories here, since ROOTDIR was initialized.
	case "$host_os" in
	netbsd* \| openbsd*)
	# Because /boot is used for the boot block in NetBSD and OpenBSD, use /grub
	# instead of /boot/grub.
	grub_prefix=/grub
	bootdir=${rootdir}
	;;
	*)
	# Use /boot/grub by default.
	bootdir=${rootdir}/boot
	;;
	esac

	grubdir=${bootdir}/grub
	device_map=${grubdir}/device.map

	# Check if GRUB is installed.
	# This is necessary, because the user can specify "grub --read-only".
	set $grub_shell dummy
	if test -f "$1"; then
	:
	else
	echo "$1: Not found." 1>&2
	exit 1
	fi

	if test -f "$pkglibdir/stage1"; then
	:
	else
	echo "${pkglibdir}/stage1: Not found." 1>&2
	exit 1
	fi

	if test -f "$pkglibdir/stage2"; then
	:
	else
	echo "${pkglibdir}/stage2: Not found." 1>&2
	exit 1
	fi

	# Don't check for *stage1_5, because it is not fatal even if any
	# Stage 1.5 does not exist.

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

	# If --recheck is specified, remove the device map, if present.
	if test $recheck = yes; then
	rm -f $device_map
	fi

	# Create the device map file if it is not present.
	if test -f "$device_map"; then
	:
	else
	# Create a safe temporary file.
	test -n "$mklog" && log_file=`$mklog`

	$grub_shell --batch $no_floppy --device-map=$device_map <<EOF >$log_file
	quit
	EOF
	if grep "Error [0-9]*: " $log_file >/dev/null; then
	cat $log_file 1>&2
	exit 1
	fi

	rm -f $log_file
	fi

	# Make sure that there is no duplicated entry.
	tmp=`sed -n '/^([fh]d[0-9])/s/\(^(.)\).*/\1/p' $device_map \
	\| sort \| uniq -d \| sed -n 1p`
	if test -n "$tmp"; then
	echo "The drive $tmp is defined multiple times in the device map $device_map" 1>&2
	exit 1
	fi

	# Check for INSTALL_DEVICE.
	case "$install_device" in
	/dev/*)
	install_device=`resolve_symlink "$install_device"`
	install_drive=`convert "$install_device"`
	# I don't know why, but some shells wouldn't die if exit is
	# called in a function.
	if test "x$install_drive" = x; then
	exit 1
	fi ;;
	\([hf]d[0-9]*\))
	install_drive="$install_device" ;;
	[hf]d[0-9]*)
	# The GRUB format with no parenthesis.
	install_drive="($install_device)" ;;
	*)
	echo "Format of install_device not recognized." 1>&2
	usage
	exit 1 ;;
	esac

	# Get the root drive.
	root_device=`find_device ${rootdir}`
	bootdir_device=`find_device ${bootdir}`

	# Check if the boot directory is in the same device as the root directory.
	if test "x$root_device" != "x$bootdir_device"; then
	# Perhaps the user has a separate boot partition.
	root_device=$bootdir_device
	grub_prefix="/grub"
	fi

	# Convert the root device to a GRUB drive.
	root_drive=`convert "$root_device"`
	if test "x$root_drive" = x; then
	exit 1
	fi

	# Check if the root directory exists in the same device as the grub
	# directory.
	grubdir_device=`find_device ${grubdir}`

	if test "x$grubdir_device" != "x$root_device"; then
	# For now, cannot deal with this situation.
	cat <<EOF 1>&2
	You must set the root directory by the option --root-directory, because
	$grubdir does not exist in the root device $root_device.
	EOF
	exit 1
	fi

	# Copy the GRUB images to the GRUB directory.
	for file in ${grubdir}/stage1 ${grubdir}/stage2 ${grubdir}/*stage1_5; do
	rm -f $file \|\| exit 1
	done
	for file in \
	${pkglibdir}/stage1 ${pkglibdir}/stage2 ${pkglibdir}/*stage1_5; do
	cp -f $file ${grubdir} \|\| exit 1
	done

	# Make a default file.
	${grub_set_default} --root-directory=${rootdir} default

	# Make sure that GRUB reads the same images as the host OS.
	test -n "$mkimg" && img_file=`$mkimg`
	test -n "$mklog" && log_file=`$mklog`

	for file in ${grubdir}/stage1 ${grubdir}/stage2 ${grubdir}/*stage1_5; do
	count=5
	tmp=`echo $file \| sed "s\|^${grubdir}\|${grub_prefix}\|"`
	while test $count -gt 0; do
	$grub_shell --batch $no_floppy --device-map=$device_map <<EOF >$log_file
	dump ${root_drive}${tmp} ${img_file}
	quit
	EOF
	if grep "Error [0-9]*: " $log_file >/dev/null; then
	:
	elif cmp $file $img_file >/dev/null; then
	break
	fi
	sleep 1
	count=`expr $count - 1`
	done
	if test $count -eq 0; then
	echo "The file $file not read correctly." 1>&2
	exit 1
	fi
	done

	rm -f $img_file
	rm -f $log_file

	# Create a safe temporary file.
	test -n "$mklog" && log_file=`$mklog`

	# Now perform the installation.
	$grub_shell --batch $no_floppy --device-map=$device_map <<EOF >$log_file
	root $root_drive
	setup $force_lba --stage2=$grubdir/stage2 --prefix=$grub_prefix $install_drive
	quit
	EOF

	if grep "Error [0-9]*: " $log_file >/dev/null \|\| test $debug = yes; then
	cat $log_file 1>&2
	exit 1
	fi

	rm -f $log_file

	# Prompt the user to check if the device map is correct.
	echo "Installation finished. No error reported."
	echo "This is the contents of the device map $device_map."
	echo "Check if this is correct or not. If any of the lines is incorrect,"
	echo "fix it and re-run the script \`grub-install'."
	echo

	cat $device_map

	# Bye.
	exit 0