#!/bin/sh
OLDPWD="$PWD"
cd "$(dirname "$0")"
BUSYBOX_SRC="$(realpath ../busybox)"
BUSYBOX_FS="$(realpath ../busybox/rootfs)"
OVERLAY_FS="$(realpath ../rootfs)"
cd "$OLDPWD"

# change into the (mounted) target rootfs folder
cd "$1"

# scaffold folders
for dir in \
	bin dev etc home lib proc root sbin srv sys tmp usr var \
	var/log var/run \
	etc/network/if-down.d etc/network/if-post-down.d \
	etc/network/if-pre-up.d etc/network/if-up.d \
	usr/share/udhcpc
do
	mkdir -p "$dir"
done

# create special devices
! [ -c dev/mem ] && mknod dev/mem c 1 1
! [ -c dev/null ] && mknod dev/null c 1 3
! [ -c dev/random ] && mknod dev/random c 1 8
! [ -c dev/urandom ] && mknod dev/urandom c 1 9
! [ -c dev/zero ] && mknod dev/zero c 1 5

# copy busybox files and overlay files
CPFLAGS='--no-dereference --recursive --preserve=mode,timestamps,links --no-preserve=owner'
cp $CPFLAGS "$BUSYBOX_FS/." .
cp $CPFLAGS "$OVERLAY_FS/." .

# remove legacy files
rm linuxrc

# setuid busybox
chmod a=xrs,u+w bin/busybox

# exit safely (continue makefile)
exit 0