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#!/bin/sh
if [ "$ROOT_DEVICE" = "/dev/loop" ]; then
loop_mount() {
loopdev=/dev/loop$loop_num
mountpt=/mnt/loop$loop_num
[ -e $loopdev ] || mknod $loopdev b 7 $loop_num
# if only one argument was specified, let it be path not dev
if [ -z "$path" ] && [ -n "$dev" ]; then
path="$dev"
dev=""
fi
[ -z "$offset" ] && offset=0
if [ -n "$dev" ]; then
hostpt=`expr "$dev" : '.*/\([^/]*\)'`
[ -z "$hostpt" ] && hostpt="$dev"
echo "Mounting $dev on $hostpt"
mkdir $hostpt
mount $dev $hostpt
fi
echo "Loopback setup of $path (offset $offset)"
losetup -o "$offset" "$loopdev" "$hostpt/$path"
echo "Mounting $loopdev on $mountpt"
mkdir "$mountpt"
mount "$loopdev" "$mountpt"
cd "$mountpt"
BOOT_ROOT="$mountpt"
loop_num=`expr "$loop_num" + 1`
}
modprobe loop
loop_num=0
for arg in $CMDLINE; do
optarg=`expr "x$arg" : 'x[^=]*=\(.*\)'`
echo $arg xxx $optarg
case $arg in
looproot=*)
dev=`expr "$optarg" : '\([^:]*\).*'`
path=`expr "$optarg" : '[^:]*:\([^:]*\).*'`
offset=`expr "$optarg" : '[^:]*:[^:]*:\([^:]*\).*'`
loop_mount ;;
esac
done
fi
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