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gord
ca924e1180
* util/grub-image.in: Initial cut at a script for creating GRUB boot images. * util/Makefile.am (noinst_SCRIPTS): Added grub-image. * configure.in (AC_OUTPUT): Added util/grub-image.
139 lines
3.7 KiB
Bash
139 lines
3.7 KiB
Bash
#! /bin/sh
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# grub-image - Create a GRUB boot filesystem image and tarball
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# Gordon Matzigkeit <gord@fig.org>, 2000-07-25
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#
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# Copyright (C) 2000 Free Software Foundation, Inc.
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#
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# This file is free software; you can redistribute it and/or modify it
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# under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 2 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful, but
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# WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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# General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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prefix=@prefix@
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exec_prefix=@exec_prefix@
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sbindir=@sbindir@
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datadir=@datadir@
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PACKAGE=@PACKAGE@
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host_cpu=@host_cpu@
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host_os=@host_os@
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host_vendor=@host_vendor@
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context=${host_cpu}-${host_vendor}
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pkgdatadir=${datadir}/${PACKAGE}/${context}
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mke2fs=/sbin/mke2fs
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progname=`echo "$0" | sed 's%^.*/%%'`
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thisdir=`echo "$0" | sed 's%/[^/]*$%%'`
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test "X$thisdir" = "X$0" && thisdir=.
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# See if we were invoked from within the build directory, and if so,
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# use the built files rather than the installed ones.
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if test -f $thisdir/../stage2/stage2.c; then
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grub_shell="$thisdir/../grub/grub"
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stage1dir="$thisdir/../stage1"
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stage2dir="$thisdir/../stage2"
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else
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grub_shell=${sbindir}/grub
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stage1dir="$pkgdatadir"
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stage2dir="$pkgdatadir"
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fi
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# Exit on any error.
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set -e
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# Get GRUB's version from the Grub shell, since we use the
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# installed files.
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VERSION=`$grub_shell --version | sed 's/^.* //'`
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test "X$VERSION" != X
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bootdir=${PACKAGE}-${VERSION}-${context}
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image=$bootdir.ext2fs
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# Create the tarball.
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if test ! -f $bootdir.tar.gz; then
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echo "# Creating \`$bootdir.tar.gz'"
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mkdir -p $bootdir/boot/grub
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cp -p $stage1dir/stage1 $stage2dir/*_stage1_5 $stage2dir/stage2 \
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$bootdir/boot/grub
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test ! -f menu.lst || cp -p menu.lst $bootdir/boot/grub
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trap "rm -f $bootdir.tar.gz" 0
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GZIP=-9 tar -zcf $bootdir.tar.gz $bootdir
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trap '' 0
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rm -rf $bootdir
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fi
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# Create a new filesystem image of the specified size.
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if test ! -f $image; then
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tarsize=`zcat $bootdir.tar.gz | wc -c`
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# Add about 30% (20% overhead plus 10% breathing room), and convert
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# to kilobytes. This factor was determined empirically.
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SIZE=`expr $tarsize \* 130 / 100 / 1024`k
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echo "# Creating $SIZE disk image \`$image'"
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trap "rm -f $image" 0
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dd if=/dev/zero of=$image bs=$SIZE count=1 >/dev/null
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$mke2fs -F $image
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trap '' 0
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fi
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# Attempt to mount the image.
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echo "# Mounting \`$image'"
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test -d $bootdir || mkdir $bootdir
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case "$host_os" in
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gnu*)
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settrans -a $bootdir /hurd/ext2fs $image
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umount="settrans -a $bootdir"
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;;
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linux*)
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# This requires running as root, and using the loop device.
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i=0
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while test -e /dev/loop$i; do
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if /sbin/losetup /dev/loop$i $image; then
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break
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fi
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i=`expr $i + 1`
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done
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# Silly losetup doesn't report an error!
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mount /dev/loop$i $bootdir
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umount="umount $bootdir && /sbin/losetup -d /dev/loop$i && trap '' 0"
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;;
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*)
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echo "$progname: Mounting \`$image' under \`$host_os' is not supported" 1>&2
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exit 1
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;;
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esac
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trap "$umount" 0
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# Extract our tarball into the image, then unmount it.
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echo "# Copying files into \`$image':"
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tar -zxvf $bootdir.tar.gz
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echo "# \`$image' usage:"
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df $bootdir
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eval $umount
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rmdir $bootdir || :
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# Use the GRUB shell to properly set up GRUB on the image.
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echo "# Installing GRUB in \`$image'"
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cat <<EOF | $grub_shell --batch --device-map=/dev/null
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device (fd0) $image
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root (fd0)
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install /boot/grub/stage1 (fd0) /boot/grub/stage2
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quit
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EOF
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exit 0
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