#! /bin/busybox sh

die() {
        echo "$@"
        exit 1;
}

# Make sure busybox links are installed
/bin/busybox --install

export PATH=/bin:/usr/bin

# Create standard fhs layout, in case any were missing
for dname in bin boot dev dev/pts etc mnt mnt_data mnt_sysimg opt proc root sys tmp usr var var/lock var/log var/run var/tmp; do
        mkdir -p $dname;
done
chmod 01777 /tmp
chmod 01777 /var/tmp

# set up basic disk-independent mounts
mount -t proc -o noatime proc /proc || die "Failed to mount /proc"
mount -t sysfs -o noatime sysfs /sys || die "Failed to mount /sys"

# enable magic sysrq key
echo "1" >/proc/sys/kernel/sysrq || echo "Failed to enable magic sysrq key"

# start up mdev, for automatic device node creation
mount -t devpts devpts /dev/pts || exit 1
echo /bin/mdev > /proc/sys/kernel/hotplug || exit 1
mdev -s || die "Failed to run mdev -s" # populate initial nodes

# set up some basic networking settings
ifconfig lo 127.0.0.0
route add -net 127.0.0.0/8 lo
ifconfig eth0 192.168.10.5
route add -net 0.0.0.0 gw 192.168.10.1

# check for forced rescue mode
if grep rescue /proc/cmdline >/dev/null; then
        die "[Rescue mode requested; deliberately failing startup script."]
fi

# find the system partition
for devname in hda hdb hdc sda sdb sdc sdd; do
        if mount -r /dev/${devname}2 /mnt_sysimg -o noatime,async; then
                [[ -f /mnt_sysimg/system.partition.tag ]] && break
                umount /mnt_sysimg
        fi
done
[[ -f /mnt_sysimg/system.partition.tag ]] || die "Failed to find system partition!";

# Now merge the system with tmpfs
mount -t unionfs -o dirs=/fhs=rw:/mnt_sysimg/fhs=ro none /union || die "Failed to set up unionfs";

# assume the data partition is right next to it
mount /dev/${devname}3 /mnt_data -o noatime || die "Failed to find data partition!";

# run any additional persistent fixups we've added (meant to be temporary)
[[ -x /mnt_data/initialize-extras ]] && { /mnt_data/initialize-extras || exit 1; };

exit 0