# Copyright 2008 Luis R. Rodriguez <mcgrof@kernel.org>

NAME = quickki
VER = 0.0.1

KORG_URL = http://www.kernel.org/pub/linux/kernel/v
KERNEL_VERSION = 2
KERNEL_PATCHLEVEL = 6
KERNEL_SUBLEVEL = 24
KERNEL_EXTRAVERSION = .4
KERNEL_MAIN_VER=$(KERNEL_VERSION).$(KERNEL_PATCHLEVEL).$(KERNEL_SUBLEVEL)
KVER = $(KERNEL_MAIN_VER)$(KERNEL_EXTRAVERSION)
KERNEL_DIR = linux-$(KVER)
KERNEL_TAR = $(KERNEL_DIR).tar.gz
KERNEL_BASE_URL = $(KORG_URL)$(KERNEL_VERSION).$(KERNEL_PATCHLEVEL)
KERNEL_TAR_URL = $(KERNEL_BASE_URL)/$(KERNEL_TAR)
KERNEL_NAME = linux-$(NAME)-$(KVER)
BBOX_VERSION = 1.8.2
BBOX_DIR = busybox-$(BBOX_VERSION)
BBOX_TAR = busybox-$(BBOX_VERSION).tar.gz
BBOX_URL = http://busybox.net/downloads
BBOX_TAR_URL = $(BBOX_URL)/$(BBOX_TAR)

KERNEL_CONFIG_FILE ?= $(KERNEL_NAME).config
BBOX_CONFIG_FILE ?= $(BBOX_DIR).config

INITRAMFS = initramfs-$(NAME)-$(VER)
INITRAMFSGZ = $(INITRAMFS).gz
INITRAMFS_LIST = $(INITRAMFS).list

GETMAC_DIR= getmac-1.0

# Where we get our build config files from
CONFIG = config
# Where the kernel and initramfs end up
BUILD = build
# What we'll build our initramfs rootfs from
ROOTFS = rootfs
# Where the tars are dl'ed and extracted
SOURCE = src
# Dump temp data
TEMP = tmp

# Add new libs as necessary, and move to uClibc ASAP
LIB =	/lib/ld-linux.so.2 /lib/libc.so.6 /lib/libm.so.6 /lib/libpthread.so.0 
LIB +=	/lib/libdl.so.2 /lib/libcrypt.so.1 
LIB +=	/lib/libnss_dns.so.2 /lib/libresolv.so.2

# This is what we could use once on uclibc
UCLIBC = /lib/ld-uClibc.so.0 /lib/libc.so.0 /lib/libm.so.0

all: kernel initramfs

dirs:
	install -d $(BUILD) $(ROOTFS) $(SOURCE) $(TEMP)

bbox: 	get_bbox
	if [ ! -r $(SOURCE)/$(BBOX_DIR) ] ; then \
	  tar -xzf $(SOURCE)/$(BBOX_TAR) -C $(SOURCE); \
	fi
	cp $(CONFIG)/$(BBOX_CONFIG_FILE) $(SOURCE)/$(BBOX_DIR)/.config
	sed 's|CONFIG_PREFIX=.*|CONFIG_PREFIX=\"../../$(ROOTFS)/\"|'  \
	  $(CONFIG)/$(BBOX_CONFIG_FILE) > $(SOURCE)/$(BBOX_DIR)/.config
	$(MAKE) -C $(SOURCE)/$(BBOX_DIR) install

getmac:
	make -C $(GETMAC_DIR)/ install DESTDIR=$(CURDIR)/$(ROOTFS)/

filesystem: dirs
	install -d $(ROOTFS)/tmp
	install -d $(ROOTFS)/var
	install -d $(ROOTFS)/var/log
	install -d $(ROOTFS)/log
	install -d $(ROOTFS)/var/run
	install -d $(ROOTFS)/lib
	install -d $(ROOTFS)/sbin
	install $(LIB) $(ROOTFS)/lib
	install -d $(ROOTFS)/etc
	install -d $(ROOTFS)/etc/init.d
	install -d $(ROOTFS)/proc
	install -d $(ROOTFS)/dev
	-sudo mknod -m 666 $(ROOTFS)/dev/urandom c 1 9
	-sudo mknod -m 660 $(ROOTFS)/dev/console c 5 1
	-sudo mknod -m 666 $(ROOTFS)/dev/null c 1 3
	-sudo mknod -m 666 $(ROOTFS)/dev/tty0 c 4 0
	-sudo mknod -m 600 $(ROOTFS)/dev/ttyS0 c 4 64
	-sudo mknod -m 600 $(ROOTFS)/dev/ttyp0 c 3 0
	-sudo mknod -m 620 $(ROOTFS)/dev/ptmx c 5 2
	-sudo mknod -m 660 $(ROOTFS)/dev/hda b 3 0
	-sudo mknod -m 660 $(ROOTFS)/dev/hda1 b 3 1
	-sudo mknod -m 660 $(ROOTFS)/dev/hda2 b 3 2
	-sudo mknod -m 660 $(ROOTFS)/dev/hda3 b 3 3
	-sudo mknod -m 660 $(ROOTFS)/dev/sda b 8 0
	-sudo mknod -m 660 $(ROOTFS)/dev/sda1 b 8 1
	-sudo mknod -m 660 $(ROOTFS)/dev/sda2 b 8 2
	-sudo mknod -m 660 $(ROOTFS)/dev/sda3 b 8 3
	-sudo mknod -m 660 $(ROOTFS)/dev/sda4 b 8 4
	sudo chown `id -u`:`id -g` $(ROOTFS)/dev/*
	cd $(ROOTFS) && ln -sf sbin/init init
	install -m 755 $(CONFIG)/rcS $(ROOTFS)/etc/init.d/
	install -m 755 $(CONFIG)/udhcp* $(ROOTFS)/etc/
	install -m 644 $(CONFIG)/passwd $(ROOTFS)/etc/
	install -m 644 $(CONFIG)/group $(ROOTFS)/etc/
	install -m 644 $(CONFIG)/services $(ROOTFS)/etc/
	install -m 755 /bin/lspci $(ROOTFS)/bin/lspci
	install -m 755 /sbin/shutdown $(ROOTFS)/sbin/
	echo "US/Eastern" > $(ROOTFS)/etc/timezone

kernel: dirs get_kernel
	if [ ! -r $(BUILD)/$(KERNEL_NAME) ] ; then \
	  cp $(CONFIG)/$(KERNEL_CONFIG_FILE) $(SOURCE)/$(KERNEL_DIR)/.config ;\
	  $(MAKE) -C $(SOURCE)/$(KERNEL_DIR) -j8 bzImage; \
          cp $(SOURCE)/$(KERNEL_DIR)/arch/i386/boot/bzImage \
	    $(BUILD)/$(KERNEL_NAME) ; \
	fi

# Note: current kernel expects init on initramfs on /init, not /sbin/init
initramfs: dirs bbox filesystem getmac get_init_cpio
	rm -f $(BUILD)/$(INITRAMFS) $(BUILD)/$(INITRAMFSGZ)
	rm -rf $(ROOTFS)/usr/share/doc/ $(ROOTFS)/usr/share/man/
	/bin/sh $(SOURCE)/$(KERNEL_DIR)/scripts/gen_initramfs_list.sh \
	  -u `id -u` -g `id -g` $(ROOTFS) > $(TEMP)/$(INITRAMFS_LIST)
	$(SOURCE)/$(KERNEL_DIR)/usr/gen_init_cpio \
	  $(TEMP)/$(INITRAMFS_LIST) > $(BUILD)/$(INITRAMFS)
	gzip -f -9 $(BUILD)/$(INITRAMFS)

get_init_cpio: get_kernel
	if [ ! -f $(SOURCE)/$(KERNEL_DIR)/usr/gen_init_cpio ] ; then \
	  cd $(SOURCE)/$(KERNEL_DIR)/usr/ && make gen_init_cpio ;\
	fi

get_kernel:
	if [ ! -d $(SOURCE)/$(KERNEL_DIR) ] ; then \
	  if [ -f /usr/src/$(KERNEL_TAR) ] ; then \
	    tar -xzf /usr/src/$(KERNEL_TAR) -C $(SOURCE); \
	  else  \
	    wget -P $(SOURCE) $(KERNEL_TAR_URL); \
	    tar -xzf $(SOURCE)/$(KERNEL_TAR) -C $(SOURCE); \
	  fi;\
	fi

get_bbox: 
	if [ ! -r $(SOURCE)/$(BBOX_TAR) ] ; then \
	wget -P $(SOURCE) $(BBOX_TAR_URL); \
	fi
clean:
	rm -rf $(BUILD) $(ROOTFS)
	if [ -d $(SOURCE)/$(KERNEL_DIR) ] ; then \
	  $(MAKE) -C $(SOURCE)/$(KERNEL_DIR) clean ; \
	fi
	if [ -d $(SOURCE)/$(BBOX_DIR) ] ; then \
	  $(MAKE) -C $(SOURCE)/$(BBOX_DIR) clean ; \
	fi
	$(MAKE) -C $(GETMAC_DIR)/ clean

mrproper:
	rm -rf $(BUILD) $(ROOTFS) $(SOURCE) $(TEMP)

.PHONY: all apt-get-update dirsbbox getmac \
	filesystem kernel initramfs get_init_cpio get_kernelget_bbox \
	clean mrproper