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|
#!/bin/bash
KERNEL=
RAMDISK=
CMDLINE=
GENEXT2FS=
GRUBCONF=
TMPDIR=
OUTPUT=
while [ $# -gt 0 ]; do
case $1 in
--kernel)
KERNEL=$2
shift
;;
--ramdisk)
RAMDISK=$2
shift
;;
--cmdline)
CMDLINE=$2
shift
;;
--genext2fs)
GENEXT2FS=$2
shift
;;
--tmpdir)
TMPDIR=$2
shift
;;
--grubconf)
GRUBCONF=$2
shift
;;
--output)
OUTPUT=$2
shift
;;
--help)
echo "Usage: $0 OPTIONS"
echo "Create an ext2 image that contains everything necessary"
echo -e "to be the boot file system.\n"
echo "The following options exist:"
echo " --genext2fs <genext2fs> The location of genext2fs binary"
echo " --kernel <kernel> The kernel to boot"
echo " --ramdisk <ramdisk> The ramdisk to be used"
echo " --cmdline <cmdline> The command line to use"
echo " --grubconf <confile> The path to grub conf file"
echo " --tmpdir <tmpdir> The temporary dir where files"\
"can be copied"
echo " --output <output> The filename of the output image"
echo
exit 0
;;
*)
echo "Unknown option $1."
exit 1
;;
esac
shift
done
if [ -z "$KERNEL" -o -z "$RAMDISK" -o -z "$GENEXT2FS" -o -z "$TMPDIR" -o \
-z "$OUTPUT" ]; then
echo "Missing required arguments."
exit 1
fi
if ! [ -x "$GENEXT2FS" -a -f "$RAMDISK" -a -f "$KERNEL" ]; then
echo "Must provide path to a valid genext2fs binary."
exit 1
fi
rm -rf $TMPDIR
mkdir -p $TMPDIR
echo -n "$CMDLINE" > $TMPDIR/cmdline
cp -f $KERNEL $TMPDIR/kernel
cp -f $RAMDISK $TMPDIR/ramdisk
if [ -f "$GRUBCONF" ]; then
mkdir -p $TMPDIR/boot/grub
cp -f $GRUBCONF $TMPDIR/boot/grub/menu.lst
fi
num_blocks=`du -sk $TMPDIR | tail -n1 | awk '{print $1;}'`
# add 1%
extra=`expr $num_blocks / 100`
reserve=10
[ $extra -lt $reserve ] && extra=$reserve
num_blocks=`expr $num_blocks + $extra`
num_inodes=`find $TMPDIR | wc -l`
$GENEXT2FS -d $TMPDIR -b $num_blocks -N $num_inodes -m 0 $OUTPUT
exit 0
|
