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#! /bin/sh
# Set a default boot entry for GRUB
# Copyright (C) 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.
PACKAGE=grub-legacy-ec2
VERSION=0.97-29ubuntu60
rootdir=
entry=
# Usage: usage
# Print the usage.
usage () {
cat <<EOF
Usage: grub-set-default [OPTION] entry
Set the default boot entry for GRUB.
-h, --help print this message and exit
-v, --version print the version information and exit
--root-directory=DIR Use the directory DIR instead of the root directory
ENTRY is a number or the special keyword \`default\'.
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-set-default (GNU GRUB ${VERSION})"
exit 0 ;;
--root-directory=*)
rootdir=`echo "$option" | sed 's/--root-directory=//'` ;;
-*)
echo "Unrecognized option \`$option'" 1>&2
usage
exit 1
;;
*)
if test "x$entry" != x; then
echo "More than one entries?" 1>&2
usage
exit 1
fi
# We don't care about what the user specified actually.
entry="${option}" ;;
esac
done
if test "x$entry" = x; then
echo "entry not specified." 1>&2
usage
exit 1
fi
find_grub_dir ()
{
echo -n "Searching for GRUB installation directory ... " >&2
for d in $grub_dirs ; do
if [ -d "$d" ] ; then
grub_dir="$d"
break
fi
done
if [ -z "$grub_dir" ] ; then
abort "No GRUB directory found.\n###"
else
echo "found: $grub_dir" >&2
fi
echo $grub_dir
}
grub_dirs="/boot/grub /boot/boot/grub"
# Determine the GRUB directory. This is different among OSes.
# if rootdir has been informed use it or find grubdir otherwise
if [ -n "${rootdir}" ]; then
grubdir=${rootdir}/boot/grub
if test -d ${grubdir}; then
:
else
grubdir=${rootdir}/grub
if test -d ${grubdir}; then
:
else
echo "No GRUB directory found under ${rootdir}/" 1>&2
exit 1
fi
fi
else
grubdir=$(find_grub_dir)
fi
file=${grubdir}/default
if test -f ${file}; then
chmod 0600 ${file}
rm -f ${file}
fi
cat <<EOF > $file
$entry
#
#
#
#
#
#
#
#
#
#
# WARNING: If you want to edit this file directly, do not remove any line
# from this file, including this warning. Using \`grub-set-default\' is
# strongly recommended.
EOF
# Bye.
exit 0