1 #! /bin/sh 2 # grub-image - Create a GRUB boot filesystem image and tarball 3 # Gordon Matzigkeit <gord (at] fig.org>, 2000-07-25 4 # 5 # Copyright (C) 2000, 2002 Free Software Foundation, Inc. 6 # 7 # This file is free software; you can redistribute it and/or modify it 8 # under the terms of the GNU General Public License as published by 9 # the Free Software Foundation; either version 2 of the License, or 10 # (at your option) any later version. 11 # 12 # This program is distributed in the hope that it will be useful, but 13 # WITHOUT ANY WARRANTY; without even the implied warranty of 14 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 15 # General Public License for more details. 16 # 17 # You should have received a copy of the GNU General Public License 18 # along with this program; if not, write to the Free Software 19 # Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. 20 21 prefix=/usr/local 22 exec_prefix=${prefix} 23 sbindir=${exec_prefix}/sbin 24 libdir=${exec_prefix}/lib 25 PACKAGE=grub 26 host_cpu=x86_64 27 host_os=linux-gnu 28 host_vendor=unknown 29 context=${host_cpu}-${host_vendor} 30 pkglibdir=${libdir}/${PACKAGE}/${context} 31 32 mke2fs=`which mke2fs` 33 34 progname=`echo "$0" | sed 's%^.*/%%'` 35 thisdir=`echo "$0" | sed 's%/[^/]*$%%'` 36 test "X$thisdir" = "X$0" && thisdir=. 37 38 # See if we were invoked from within the build directory, and if so, 39 # use the built files rather than the installed ones. 40 if test -f $thisdir/../stage2/stage2; then 41 grub_shell="$thisdir/../grub/grub" 42 stage1dir="$thisdir/../stage1" 43 stage2dir="$thisdir/../stage2" 44 else 45 grub_shell=${sbindir}/grub 46 stage1dir="$pkglibdir" 47 stage2dir="$pkglibdir" 48 fi 49 50 # Exit on any error. 51 set -e 52 53 # Get GRUB's version from the Grub shell, since we use the 54 # installed files. 55 VERSION=`$grub_shell --version | sed -e 's/^.* \([0-9.]*\).*$/\1/'` 56 test "X$VERSION" != X 57 58 bootdir=${PACKAGE}-${VERSION}-${context} 59 image=$bootdir.ext2fs 60 61 # Create the tarball. 62 if test ! -f $bootdir.tar.gz; then 63 echo "# Creating \`$bootdir.tar.gz'" 64 mkdir -p $bootdir/boot/grub 65 cp -p $stage1dir/stage1 $stage2dir/*_stage1_5 $stage2dir/stage2 \ 66 $bootdir/boot/grub 67 test ! -f menu.lst || cp -p menu.lst $bootdir/boot/grub 68 trap "rm -f $bootdir.tar.gz" 0 69 GZIP=-9 tar -zcf $bootdir.tar.gz $bootdir 70 trap '' 0 71 rm -rf $bootdir 72 fi 73 74 # Create a new filesystem image of the specified size. 75 if test ! -f $image; then 76 tarsize=`zcat $bootdir.tar.gz | wc -c` 77 78 # Add about 30% (20% overhead plus 10% breathing room), and convert 79 # to kilobytes. This factor was determined empirically. 80 SIZE=`expr $tarsize \* 130 / 100 / 1024`k 81 echo "# Creating $SIZE disk image \`$image'" 82 trap "rm -f $image" 0 83 dd if=/dev/zero of=$image bs=$SIZE count=1 >/dev/null 84 $mke2fs -F $image 85 trap '' 0 86 fi 87 88 89 # Attempt to mount the image. 90 echo "# Mounting \`$image'" 91 test -d $bootdir || mkdir $bootdir 92 case "$host_os" in 93 gnu*) 94 settrans -a $bootdir /hurd/ext2fs $image 95 umount="settrans -a $bootdir" 96 ;; 97 98 linux*) 99 # This requires running as root, and using the loop device. 100 i=0 101 while test -e /dev/loop$i; do 102 if /sbin/losetup /dev/loop$i $image; then 103 break 104 fi 105 i=`expr $i + 1` 106 done 107 108 # Silly losetup doesn't report an error! 109 mount /dev/loop$i $bootdir 110 umount="umount $bootdir && /sbin/losetup -d /dev/loop$i && trap '' 0" 111 ;; 112 113 *) 114 echo "$progname: Mounting \`$image' under \`$host_os' is not supported" 1>&2 115 exit 1 116 ;; 117 esac 118 trap "$umount" 0 119 120 # Extract our tarball into the image, then unmount it. 121 echo "# Copying files into \`$image':" 122 tar -zxvf $bootdir.tar.gz 123 124 echo "# \`$image' usage:" 125 df $bootdir 126 eval $umount 127 rmdir $bootdir || : 128 129 # Use the GRUB shell to properly set up GRUB on the image. 130 echo "# Installing GRUB in \`$image'" 131 cat <<EOF | $grub_shell --batch --device-map=/dev/null 132 device (fd0) $image 133 root (fd0) 134 install /boot/grub/stage1 (fd0) /boot/grub/stage2 135 quit 136 EOF 137 138 exit 0 139
