Hi,
Following patch allow grub-mkrescue to compress modules. It also uses xorisso
option to reduce image size as proposed in
http://lists.gnu.org/archive/html/grub-devel/2010-05/msg00100.html
It supports both xz and gzip compression. Yet, xz is disabled in this version
as it generates some issues: wrong symbols in fshelp module (I'm not sure if
this is a bug in xzio or not).
Generated image size:
no diet 1966080 B
diet with gzip 1048576 B
diet with xz 983040 B
Should be usefull for floppies.
Comments are welcome (I'm not very good at shell scripting :)
--
Szymon K. Janc
szy...@janc.net.pl // GG: 1383435
=== modified file 'ChangeLog'
--- ChangeLog 2011-01-13 21:25:56 +0000
+++ ChangeLog 2011-01-13 23:10:14 +0000
@@ -1,3 +1,10 @@
+2011-01-14 Szymon Janc <szy...@janc.net.pl>
+
+ Put grub-mkrescue generated image on diet (modules compression and
+ xorriso options).
+
+ * util/grub-mkrescue.in: New option --diet.
+
2011-01-13 Vladimir Serbinenko <phco...@gmail.com>
* grub-core/fs/zfs/zfsinfo.c (grub_cmd_zfs_bootfs): Quote bootpath and
=== modified file 'util/grub-mkrescue.in'
--- util/grub-mkrescue.in 2010-10-18 20:50:01 +0000
+++ util/grub-mkrescue.in 2011-01-13 23:23:36 +0000
@@ -44,6 +44,7 @@ override_dir=
grub_mkimage=${bindir}/`echo grub-mkimage | sed ${transform}`
xorriso=xorriso
+diet=no
# Usage: usage
# Print the usage.
@@ -59,6 +60,7 @@ Make GRUB rescue image.
--rom-directory=DIR save rom images in DIR [optional]
--xorriso=FILE use FILE as xorriso [optional]
--grub-mkimage=FILE use FILE as grub-mkimage
+ --diet apply size reducing measures [optional]
$self generates a bootable rescue image with specified source files, source
directories, or mkisofs options listed by: xorriso -as mkisofs -help
@@ -133,6 +135,9 @@ do
--xorriso=*)
xorriso=`echo "${option}/" | sed 's/--xorriso=//'` ;;
+ --diet)
+ diet=yes ;;
+
*)
source="${source} ${option} $@"; break ;;
esac
@@ -155,6 +160,41 @@ fi
iso9660_dir=`mktemp -d "${TMPDIR:-/tmp}/tmp.XXXXXXXXXX"` || exit 1
mkdir -p ${iso9660_dir}/boot/grub
+decmod=""
+decmod_dep=""
+compressor=""
+if [ "${diet}" = yes ]; then
+ # Disabled for now.
+ #compressor=`which xz || true`
+ if [ "$compressor" = "" ] ; then
+ compressor=`which gzip || true`
+ if [ "$compressor" != "" ] ; then
+ decmod="gzio"
+ compressor="$compressor --best --stdout"
+ fi
+ else
+ decmod="xzio"
+ compressor="$compressor --lzma2=dict=128KiB --check=none --stdout"
+ fi
+fi
+
+find_decmod_dep()
+{
+ deps=`grep ^$1: /boot/grub/moddep.lst|sed s/"$1:"//`
+ if [ "$deps" = "" ] ; then
+ return ;
+ fi
+
+ decmod_dep="$decmod_dep $deps"
+
+ for i in $deps ;do find_decmod_dep $i ; done
+}
+
+if [ "$decmod" != "" ]; then
+ find_decmod_dep $decmod
+ decmod_dep=`echo $decmod_dep|tr " " "\n"|sort|uniq|tr "\n" " "`
+fi
+
process_input_dir ()
{
input_dir="$1"
@@ -162,7 +202,14 @@ process_input_dir ()
mkdir -p ${iso9660_dir}/boot/grub/${platform}
for file in ${input_dir}/*.mod; do
if test -f "$file"; then
+ modname=`basename $file .mod`
+ m=`echo $decmod $decmod_dep | tr " " "\n" | grep "^$modname$" || true`;
+
+ if [ "$compressor" != "" ] && [ "$m" = "" ]; then
+ `$compressor $file > ${iso9660_dir}/boot/grub/${platform}/$modname".mod"`
+ else
cp -f "$file" ${iso9660_dir}/boot/grub/${platform}/
+ fi
fi
done
for file in ${pkglib_DATA}; do
@@ -207,7 +254,7 @@ EOF
(cd "${memdisk_dir}"; tar -cf - boot) > "${memdisk_img}"
rm -rf ${memdisk_dir}
$grub_mkimage -O ${platform} -d "${source_directory}" -m "${memdisk_img}" -o "$3" --prefix='(memdisk)/boot/grub' \
- search iso9660 configfile normal memdisk tar $4
+ $decmod search iso9660 configfile normal memdisk tar $4
rm -rf ${memdisk_img}
}
@@ -257,7 +304,7 @@ if test -e "${pc_dir}" ; then
echo "Enabling BIOS support ..."
core_img=`mktemp "${TMPDIR:-/tmp}/tmp.XXXXXXXXXX"` || exit 1
$grub_mkimage -O i386-pc -d ${pc_dir}/ -o ${core_img} --prefix=/boot/grub/i386-pc \
- iso9660 biosdisk
+ $decmod iso9660 biosdisk
cat ${pc_dir}/cdboot.img ${core_img} > ${iso9660_dir}/boot/grub/i386-pc/eltorito.img
embed_img=`mktemp "${TMPDIR:-/tmp}/tmp.XXXXXXXXXX"` || exit 1
@@ -276,7 +323,7 @@ if test -e "${pc_dir}" ; then
fi
# build multiboot core.img
-make_image "${multiboot_dir}" i386-multiboot "${iso9660_dir}/boot/multiboot.img" "ata at_keyboard"
+make_image "${multiboot_dir}" i386-multiboot "${iso9660_dir}/boot/multiboot.img" "$decmod ata at_keyboard"
if test -e "${efi64_dir}" || test -e "${efi32_dir}"; then
efi_dir=`mktemp -d "${TMPDIR:-/tmp}/tmp.XXXXXXXXXX"` || exit 1
@@ -293,17 +340,25 @@ if test -e "${efi64_dir}" || test -e "${
grub_mkisofs_arguments="${grub_mkisofs_arguments} --efi-boot efi.img"
fi
-make_image "${qemu_dir}" i386-qemu "${iso9660_dir}/boot/qemu.img" "ata at_keyboard"
+make_image "${qemu_dir}" i386-qemu "${iso9660_dir}/boot/qemu.img" "$decmod ata at_keyboard"
if [ -e "${iso9660_dir}/boot/qemu.img" ] && [ -d "${rom_directory}" ]; then
cp "${iso9660_dir}/boot/qemu.img" "${rom_directory}/qemu.img"
fi
-make_image "${coreboot_dir}" i386-coreboot "${iso9660_dir}/boot/coreboot.elf" "ata at_keyboard"
+make_image "${coreboot_dir}" i386-coreboot "${iso9660_dir}/boot/coreboot.elf" "$decmod ata at_keyboard"
if [ -e "${iso9660_dir}/boot/coreboot.elf" ] && [ -d "${rom_directory}" ]; then
cp "${iso9660_dir}/boot/coreboot.elf" "${rom_directory}/coreboot.elf"
fi
# build iso image
-"${xorriso}" -as mkisofs -graft-points ${grub_mkisofs_arguments} --protective-msdos-label -o ${output_image} -r ${iso9660_dir} --sort-weight 0 / --sort-weight 1 /boot ${source}
+if [ "${diet}" = yes ]; then
+ if [ -e "${output_image}" ]; then
+ rm "${output_image}" || exit 1
+ fi
+ "${xorriso}" -as mkisofs -graft-points -no-pad ${grub_mkisofs_arguments} --protective-msdos-label -o ${output_image} -r ${iso9660_dir} --sort-weight 0 / --sort-weight 1 /boot ${source}
+else
+ "${xorriso}" -as mkisofs -graft-points ${grub_mkisofs_arguments} --protective-msdos-label -o ${output_image} -r ${iso9660_dir} --sort-weight 0 / --sort-weight 1 /boot ${source}
+fi
+
rm -rf ${iso9660_dir}
rm -f ${embed_img}
_______________________________________________
Grub-devel mailing list
Grub-devel@gnu.org
http://lists.gnu.org/mailman/listinfo/grub-devel
