arch/all-pc/boot/grub/util/grub-image.in

   1 #! /bin/sh
   2 # grub-image - Create a GRUB boot filesystem image and tarball
   3 # Gordon Matzigkeit <gord@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=@prefix@
  22 exec_prefix=@exec_prefix@
  23 sbindir=@sbindir@
  24 libdir=@libdir@
  25 PACKAGE=@PACKAGE@
  26 host_cpu=@host_cpu@
  27 host_os=@host_os@
  28 host_vendor=@host_vendor@
  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