# Makefile for building a OpenBSD diskless boot image

default: openbsd.kernel

KERNELDIR	= DISKLESS
KERNEL		= $(KERNELDIR)/bsd

BSDRD		= bsd.rd
BSDRDURL	= ftp://ftp.openbsd.org/pub/OpenBSD/`uname -r`/i386/bsd.rd

BINDVER		= 9.5.0-P1
BIND		= bind-$(BINDVER)
BINDTGZ		= $(BIND).tar.gz
BINDURL		= ftp://ftp.isc.org/isc/bind9/$(BINDVER)/$(BINDTGZ)
NSLOOKUP	= $(BIND)/bin/dig/nslookup

DHCPVER		= 3.0.7
DHCP		= dhcp-$(DHCPVER)
DHCPTGZ		= $(DHCP).tar.gz
DHCPURL		= ftp://ftp.isc.org/isc/dhcp/$(DHCPTGZ)
DHCLIENT	= $(DHCP)/work.openbsd/client/dhclient

RAMDISKSIZE	= 20480

# Build the kernel

$(KERNEL): kernel.config
	config -b $(KERNELDIR) -s /sys kernel.config
	cd $(KERNELDIR) ; make depend ; make

# Compile elfrdsetroot

elfrdsetroot: /usr/src/distrib/common/elfrdsetroot.c
	gcc -Wall -o $@ $?

# Steal crunched executables from bsd.rd

crunchbin: elfrdsetroot
	mkdir -p bsdrdfs.d
	if [ ! -f bsd.rd ]; then wget -nv $(BSDRDURL) ; fi
	./elfrdsetroot -x bsd.rd >bsdrdfs
	sudo vnconfig -c svnd0 bsdrdfs
	sudo mount /dev/svnd0a bsdrdfs.d
	cp bsdrdfs.d/bin/sh crunchbin
	sudo umount `pwd`/bsdrdfs.d
	sudo vnconfig -u svnd0
	rmdir bsdrdfs.d

# Build ISC bind package

$(NSLOOKUP):
	if [ ! -f $(BINDTGZ) ]; then wget -nv $(BINDURL) ; fi
	tar xzf $(BINDTGZ)
	cd $(BIND) ; ./configure --disable-threads --disable-ipv6 --disable-linux-caps \
	--without-openssl --without-libtool --without-kame --without-idn --without-libiconv \
	--without-idnlib ; make LDFLAGS=-static
	strip $@

# Build ISC DHCP package

$(DHCLIENT):
	if [ ! -f $(DHCPTGZ) ]; then wget -nv $(DHCPURL) ; fi
	tar xzf $(DHCPTGZ)
	cd $(DHCP) ; ./configure ; make
	strip $@

# Build the root file system image

miniroot: crunchbin $(NSLOOKUP) $(DHCLIENT) disklabel.proto fstab init.c motd populate.sh rc
	dd if=/dev/zero of=miniroot bs=512 count=$(RAMDISKSIZE)
	sudo vnconfig -c svnd0 miniroot
	sudo disklabel -R -r svnd0 disklabel.proto
	sudo newfs svnd0c
	mkdir miniroot.d
	sudo mount /dev/svnd0c `pwd`/miniroot.d
	sudo ./populate.sh DST=`pwd`/miniroot.d NSLOOKUP=$(NSLOOKUP) DHCLIENT=$(DHCLIENT)
	df -h `pwd`/miniroot.d
	sudo umount `pwd`/miniroot.d
	sudo vnconfig -u svnd0

# Merge kernel and root file system image

openbsd.kernel: $(KERNEL) miniroot elfrdsetroot
	cp $(KERNEL) bsd
	./elfrdsetroot bsd <miniroot
	gzip bsd
	mv bsd.gz openbsd.kernel

# Install to /tftpboot

install: default
	scp openbsd.kernel $(TFTPSERVER)/tftpboot
	scp /usr/mdec/pxeboot $(TFTPSERVER)/tftpboot/openbsd.pxeboot

# Clean out working files, except the kernel and DHCP build directories

clean:
	-sudo umount `pwd`/miniroot.d
	-rm -rf miniroot.d
	-sudo vnconfig -u svnd0
	-rm elfrdsetroot
	-rm miniroot
	-rm openbsd.kernel
	-rm bsdrdfs
	-rm -rf bsdrdfs.d

# Clean out all working files

reallyclean: clean
	-rm -rf crunchbin
	-rm -rf $(BIND)
	-rm -rf $(DHCP)
	-rm -rf $(KERNELDIR)

# Return source tree to pristine state

distclean: reallyclean
	-rm bsd.rd
	-rm $(BINDTGZ)
	-rm $(DHCPTGZ)