xref: /freebsd-10.1-release/release/picobsd/build/picobsd

#!/bin/sh -
#
# $FreeBSD: head/release/picobsd/build/picobsd 180012 2008-06-25 21:33:28Z ru $
# This file requires sysutils/makefs to run
#
# The new PicoBSD build script. Invoked as
#
# picobsd [options] floppy_type site_name
#
# Where floppy_type is a directory where the picobsd config info
# is held, and ${floppy_type}/floppy.tree.${site_name} contains
# optional site-specific configuration.
#
# For Options, see the bottom of the file where the processing is
# done. The picobsd(8) manpage might be of some help, but code and docs
# tend to lose sync over time...
#
# This script depends on the following files:
#
# in ${PICO_TREE} :
#   Makefile.conf	Makefile used to build the kernel
#   config		shell variables, sourced here.
#   mfs.mtree		mtree config file
#
#   floppy.tree/	files which go on the floppy
#   mfs_tree/		files which go onto the mfs
#
# in ${MY_TREE} :
#   PICOBSD		kernel config file
#   config		shell variables, sourced here.
#   crunch.conf		crunchgen configuration
#   floppy.tree.exclude	files from floppy.tree/ which we do not need here.
#   floppy.tree/	local additions to the floppy.tree
#   floppy.tree.${site}/ same as above, site specific.
#   mfs_tree/		local additions to the mfs_free

#
#--- The main entry point is at the end.
#

# There are two set of initialization. The first one (set_defaults)
# is done on entry to the script, and is used to set default values
# for all variables which do not depend on floppy type and source tree.
#
# The second set is done after command line parsing, e.g.
# to resolve dependencies on the source tree.
#
# Naming:
# + variables that control operation (e.g. verbosity) and are generally
#   set from the command line have o_ ("option") as a name prefix
#
# + variables which contain pathnames and values that should not change
#   have c_ ("constant") as a name prefix
#
# + variables exported to Makefiles and subshells are CAPITAL
#
# + variables local to the script are lowercase, possibly with
#   an l_ ("local") prefix

# SRC points to your FreeBSD source tree.
# l_usrtree points to the /usr subdir for the source tree.
#     Normally /usr or ${SRC}/../usr
# l_objtree points to the obj tree. Normally ${l_usrtree}/obj-pico
# PICO_TREE is where standard picobsd stuff resides.
#     Normally ${SRC}/release/picobsd
# You can set SRC with --src <directory>
# It is not recommended to override the other variables.

# MY_TREE (set later) is where this floppy type resides.
# BUILDDIR is the build directory

# set some default values for variables.
# needs to be done as the first thing in the script.

# log something on stdout if verbose.
o_verbose=0	# this needs to be here!
log() {
    local foo
    [ ${o_verbose} -gt 0 ] && printf "\n*** %s\n" "$*"
    [ ${o_verbose}  -gt 1 ] && read -p "=== Press enter to continue" foo
    return 0
}

logverbose() {
    local foo
    printf "\n*** %s\n" "$*"
    read -p "=== Press enter to continue" foo
    return 0
}

set_defaults() {
    # no way to use logging in this function, variable not set yet.

    # EDITOR is the editor you use
    # fd_size  floppy size in KB (default to 1440). You can use 1480,
    #	1720, 2880, etc. but beware that only 1440 and 1480 will boot
    #	from 1.44M floppy drives (1480 will not work on vmware).
    EDITOR=${EDITOR:-vi}
    fd_size=${fd_size:-1440}

    o_all_in_mfs="yes"		# put all files in mfs so you can boot and run
				# the image via diskless boot.
    o_clean=""			# do not clean
    o_interactive=""		# default is interactive
    o_verbose=0			# verbose level, 0 is silent
    o_tarv=""			# tar verbose flag, "" or "v"
    o_init_src=""		# non "" if we need to init libs and includes.
    o_makeopts=${MAKEOPTS:--s}	# make options, be silent by default
    o_no_devfs=yes		# we do not want devfs
    o_do_modules=""		# do not build modules

    SRC="/usr/src"		# default location for sources
    c_startdir=`pwd`		# directory where we start
				# used to lookup config and create BUILDDIR

    # XXX 6.x/7.x have a single /boot/boot block, which is the concatenation
    # of the old two. For the time being, we keep these, but this should
    # be fixed at some point.

    # blocks
    c_boot1=/boot/boot1		# boot blocks (in case you want custom ones)
    c_boot2=/boot/boot2

    c_reply=${c_reply:-`mktemp "/tmp/reply.XXXXXXXXXX"`}
    				# file where User replies will be put
    c_mnt=`mktemp -d "/tmp/picobsd.XXXXXXXXXX"`
    				# mountpoint used to build memory filesystems
    c_fs=fs.PICOBSD		# filename used for the memory filesystem
    c_img=picobsd.bin		# filename used for the picobsd image

    # select the right memory disk name
    case `uname -r` in
	7.*|6.*|5.*)
	    l_label="bsdlabel"
	    ;;
	*)
	    l_label="disklabel"
	    ;;
    esac

    set -e

    trap fail 2
    #trap fail 3
    #trap fail 6
    trap fail 15
}

create_includes_and_libraries2() {
    local no
    log "create_includes_and_libraries2() for ${SRC}"
    if [ ${OSVERSION} -ge 600000 ] ; then
	no="-DNO_CLEAN -DNO_PROFILE -DNO_GAMES -DNO_LIBC_R"
    else
	no="-DNOCLEAN -DNOPROFILE -DNOGAMES -DNOLIBC_R"
    fi
    MAKEOBJDIRPREFIX=${l_objtree}
    export MAKEOBJDIRPREFIX
    ( cd ${SRC};
    # make -DNOCLEAN -DNOPROFILE -DNOGAMES -DNOLIBC_R -DPICOBSD buildworld
    make _+_= $no toolchain
    )
}

# entry for 4.x and earlier trees
create_includes_and_libraries() {
    local e i

    log "create_includes_and_libraries() for ${SRC}"
    # Optionally creates include directory and libraries.
    mkdir -p ${l_usrtree}/include		# the include directory...
    mkdir -p ${l_usrtree}/share/misc	# a few things go here
    mkdir -p ${l_usrtree}/lib		# libraries
    mkdir -p ${l_usrtree}/sbin		# some binaries
    # override variables for ownershiip and destinations
    # BINOWN:BINGRP are also used for include files
    (cd ${SRC}; \
	BINOWN=`id -un` BINGRP=`id -gn` \
	DESTDIR=${l_usrtree}/.. \
	make -m ${SRC}/share/mk includes ) || fail $? includes
    # Pick up the correct headers for libraries.
    CFLAGS="-nostdinc -I${l_usrtree}/include" ; export CFLAGS

    (cd ${SRC}
	# $e is the invocation of make with correct environment
	# XXX check the NO* options below, maybe system dependent.
	e="MAKEOBJDIRPREFIX=${l_objtree}/picobsd/libraries \
	    BINOWN=`id -un` BINGRP=`id -gn` \
	    DESTDIR=${l_usrtree}/.. \
	    make -m ${SRC}/share/mk \
		-DNOHTML -DNOINFO -DNOMAN -DNOSHARE -DNOFSCHG "
	log "do a 'make obj' in a few places."
	# This is very version-specific... The following works for 5.0
	for i in lib secure/lib gnu/lib \
		gnu/usr.bin/perl usr.bin/lex usr.sbin/config ; do
	    (cd ${i}; eval $e obj)
	done
	log "now make the static libraries"
	eval $e -DNOPROFILE -DNOPIC libraries
	(cd ${SRC}/usr.sbin/config
	eval $e		# build binary
	eval $e	install	# install it
	)
    ) || fail $? "libraries"
    log "Libraries done"
}

# set_type <type> looks in user or system directories for the floppy type
# specified as first argument, and sets variables according to the config.
# file. Sets THETYPE, SITE, name, MY_TREE and BUILDDIR

set_type() {
    local a i

    log "set_type() : Type '$1' site '$2'"
    THETYPE=$1
    SITE=$2
    a=$1
    name=""	# clear in case of errors
    for i in ${c_startdir}/${a} ${PICO_TREE}/${a} ; do
	log "set_type: checking $i"
	[ -d $i -a -f $i/PICOBSD -a -f $i/crunch.conf ] || continue
	set -- `cat $i/PICOBSD | \
	    awk '/^#PicoBSD/ {print $2, $3, $4, $5, $6}'`
	[ x"$1" != "x" ] || continue
	MFS_SIZE=$1 ; init_name=$2
	mfs_inodes=$3 ; fd_inodes=$4
	name=`(cd $i ; pwd) `
	name=`basename $name`
	MY_TREE=$i
	BUILDDIR=${c_startdir}/build_dir-${name}
	log "Matching file $name in $i"
	return ;
    done
    logverbose "Type $a NOT FOUND"
}

clean_tree() {
    log "clean_tree()"
    if [ "${name}" = "" ] ; then
	echo "---> Wrong floppy type"
	exit 3
    fi
    rm -rf ${BUILDDIR}
}

# prepare a message to be printed in the dialog menus.
set_msgs() {		# OK
    log "set_msgs()"

    MSG1="Type: ${THETYPE} name $name"

    MSG="PicoBSD build -- Current parameters:\n\n\t1.  ${MSG1}\n\
\t2.  MFS size: ${MFS_SIZE} kB\n\
\t3.  Site-info: ${SITE}\n\t4.  Full-path: ${MY_TREE}\n"
}


# Main build procedure.
build_image() {
    log "build_image() <${name}>"
    [ "${name}" != "" ] || fail $? bad_type
    clear
    set_msgs
    printf "${MSG}---> We'll use the sources living in ${SRC}\n\n"

    # read config variables from a global and then a type-specific file
    # basically STAND_LINKS and MY_DEVS, but can also override other
    # variables.
    # 
    . ${PICO_TREE}/build/config
    if [ -f ${MY_TREE}/config ] ; then
	. ${MY_TREE}/config
    fi

    # location of the object directory
    PICO_OBJ=${l_objtree}/picobsd/${THETYPE}
    log "PICO_OBJ is ${PICO_OBJ}"

    if [ ${OSVERSION} -ge 500035 ] ; then
	export MAKEOBJDIRPREFIX=${l_objtree}
	eval "export BINMAKE=\"`cd ${SRC}; make -f Makefile -V BINMAKE`\""
	eval export `cd ${SRC}; ${BINMAKE} -f Makefile.inc1 -V WMAKEENV`
    fi
    # create build directory and subtree
    mkdir -p ${BUILDDIR}/crunch
    # remove any old stuff
    rm -f ${BUILDDIR}/kernel.gz ${BUILDDIR}/${c_fs}
    # invoke commands to build a kernel
    do_kernel
    # fill a subdirectory with things that go into the floppy
    # (mostly /etc and similar stuff)
    populate_floppy_fs
    # populate it and produce a file with the MFS image
    populate_mfs_tree		# things which go into mfs
    # create, mount and fill a filesystem with floppy image
    fill_floppy_image # copies everything into the floppy
}

build_package() {
    local z msg

    log "build_package()"
    rm -rf build.status
    echo "##############################################" >>build.status
    echo "## `date` ">>build.status
    echo "##############################################" >>build.status
    for z in bridge dial router net isp ; do
	set_type ${z}
        if [ "${name}" = "" ] ; then
	    echo "*** TYPE=${z} not found" >>build.status
	    continue
	fi
	echo "---------------------------------------------">>build.status
	echo "Building TYPE=${z}, SIZE=${MFS_SIZE}" >>build.status
	msg="(ok)"	# error message
	build_image || msg="** FAILED! **"
        echo "	${msg}">>build.status
	# where do i put things ?
	# clean_tree
    done
    exit 0
}

# Set build parameters interactively

main_dialog() {
  local ans i l

  log "main_dialog()"
  while [ true ] ; do
    set_msgs
    rm ${c_reply}
    dialog --menu "PicoBSD build menu -- (29 sep 2001)" 19 70 12 \
	N "--> READY, build it <---" \
	T "${MSG1}" \
	K "edit Kernel config file" \
	E "Edit crunch.conf file" \
	S "MFS Size: ${MFS_SIZE}kB" \
	I "Init type: ${init_name}" \
	F "Floppy size: ${fd_size}kB" \
	M "MFS bytes per inode: ${mfs_inodes}" \
	U "UFS bytes per inode: ${fd_inodes}" \
	$ "Site-info: ${SITE}" \
	Q "Quit" \
	2> ${c_reply}
    ans=`cat ${c_reply}`
    rm ${c_reply}
    case ${ans} in
    T)
	l=""
	for i in ${c_startdir} ${c_startdir}/* ${PICO_TREE}/* ; do
	    if [ -d $i -a -f $i/PICOBSD -a -f $i/crunch.conf ]; then
		l="$l `basename $i` `basename $i`"
	    fi
	done
	log $l
	{ dialog --menu "Setup the type of configuration" 12 70 5 $l \
		2> ${c_reply} && set_type "`cat ${c_reply}`" ${SITE} ; } || true
	;;
    I)
	{ dialog --menu "Choose your init(8) program" \
	10 70 2 init "Standard init (requires getty)" \
	oinit "small init from TinyWare" 2> ${c_reply} \
		&& init_name=`cat ${c_reply}` ; } || true
	;;

    K) ${EDITOR} ${MY_TREE}/PICOBSD ;;

    E) ${EDITOR} ${MY_TREE}/crunch.conf ;;

    S)
	{ dialog --title "MFS Size setup" --inputbox \
"MFS size depends on what you need to put on the MFS image. Typically \
ranges between 820kB (for very small bridge/router images) to \
as much as 2500kB kB for a densely packed image. \
Keep in mind that this memory is \
totally lost to other programs. Usually you want to keep \
this as small as possible. " 10 70 2> ${c_reply} \
	&& MFS_SIZE=`cat ${c_reply}` ; } || true
	;;

    \$)
	{ dialog --title "Site info setup" --inputbox \
	"Please enter the full path to the directory \
	containing site-specific setup. \
	This directory tree must contain files that replace \
	standard ones in floppy.tree/ and mfs.tree/ . " \
	10 70 2> ${c_reply} && SITE=`cat ${c_reply}` ; } || true
	;;

    F)
	{ dialog --menu "Set floppy size" 15 70 4 \
	    1440 "1.44MB" 1720 "1.72MB" 2880 "2.88MB" 4096 "4MB" \
		 2> ${c_reply} && fd_size=`cat ${c_reply}` ; } || true
	;;

    M)
	{ dialog --title "MFS bytes per inode:" --inputbox \
	"Enter MFS bytes per inode (typically 4096..65536). \
	A larger value means fewer inodes but more space on MFS" \
	10 70 2> ${c_reply} && mfs_inodes=`cat ${c_reply}`  ; } || true
	;;

    U)
	{ dialog --title "Floppy bytes per inode:" --inputbox \
	"Enter floppy bytes per inode (typically 3072..65536). \
	A larger value means fewer inodes but more space on the floppy." \
	10 70 2> ${c_reply} && fd_inodes=`cat ${c_reply}` ; } || true
	;;

    N) break 2
	;;

    Q) exit 0 ;;

    *) echo "Unknown option \"${ans}\". Try again."
	sleep 2
	clear
	;;
    esac
  done
}

# Call the build procedure
# Install image
do_install() {
    log "do_install()"

    if [ "${o_interactive}" = "NO" ] ; then
	echo "+++ Build completed +++"
	cat .build.reply || true
	return
    fi
    dialog --title "Build ${THETYPE} completed" --inputbox \
"\nThe build process was completed successfuly.\n\
`cat .build.reply` \n\n\
Now we are going to install the image on the floppy.\n\
Please insert a blank floppy in /dev/fd0.\\n
WARNING: the contents of the floppy will be permanently erased!\n\
\n\
Your options:\n\
	* ^C or [Cancel] to abort,\n\
	* Enter to install ${c_img},\n\
" 20 80 2> ${c_reply}
    if [ "$?" = "0" ]; then
	echo "Writing ${c_img}..."
	dd if=${BUILDDIR}/${c_img} of=/dev/fd0.${fd_size}
    else
	echo "Ok, the image is in ${c_img}"
    fi
    echo "Done."
}


#-------------------------------------------------------------------

# invoke the picobsd Makefile to compile the kernel.
# if MODULES is set (value is irrelevant) the makefile will build modules.
do_kernel() {		# OK
    log "do_kernel() Preparing kernel \"$name\" in $MY_TREE"
    (cd $MY_TREE; export name SRC BUILDDIR # used in this makefile ;
	# export CONFIG
	[ "${o_do_modules}" = "yes" ] && export MODULES=""
	${BINMAKE} -v -f ${PICO_TREE}/build/Makefile.conf ) || \
	fail $? missing_kernel
}

# Populate the variable part of the floppy filesystem. Must be done before
# the MFS because its content might need to be copied there as well.
#
# This involves fetching files from three subtrees, in this order:
#
#  1. a standard one, from which type-specific files are excluded;
#  2. a type-specific one;
#  3. a site-specific one.
#
# Files are first copied to a local tree and then compressed.

populate_floppy_fs() {		# OK
    local dst excl srcdir

    log "populate_floppy_fs()"
    dst=${BUILDDIR}/floppy.tree
    log "pwd=`pwd` Populating floppy filesystem..."

    # clean relics from old compilations.
    rm -rf ${dst} || true
    mkdir ${dst}

    excl=${MY_TREE}/floppy.tree.exclude
    if [ -f ${excl} ] ; then
	log "Files excluded from generic tree: `echo;cat ${excl}`"
	excl="--exclude-from ${excl}"
    else
	excl=""
    fi
    (cd ${PICO_TREE}/floppy.tree ; tar -cf - --exclude CVS --exclude .svn \
    		${excl} . ) | \
		(cd ${dst} ; tar x${o_tarv}f - )
    log "Copied from generic floppy-tree `echo; ls -laR ${dst}`"

    srcdir=${MY_TREE}/floppy.tree
    if [ -d ${srcdir} ] ; then
	log "update with type-specific files:"
	(cd ${srcdir} ; tar -cf - --exclude CVS --exclude .svn . ) | \
	    (cd ${dst} ; tar x${o_tarv}f - )
	log "Copied from type floppy-tree `echo; ls -laR ${dst}`"
    else
	log "No type-specific floppy-tree"
    fi
    if [ -d ${srcdir}.${SITE} ] ; then
	log "Update with site-specific (${SITE}) files:"
	(cd ${srcdir}.${SITE} ; tar -cf - --exclude CVS --exclude .svn . ) | \
	    (cd ${dst} ; tar x${o_tarv}f - )
	log "Copied from site floppy-tree `echo; ls -laR ${dst}`"
    else
	log "No site-specific floppy-tree"
    fi

    # gzip returns an error if it fails to compress some file
    (cd $dst ; gzip -9 etc/*
	    log "Compressed files in etc/ `echo; ls -l etc`"
    ) || true
}

# Populate the memory filesystem with binaries and non-variable
# configuration files.
# First do an mtree pass, then create directory links and device entries,
# then run crunchgen etc. to build the binary and create links.
# Then copy the specific/generic mfs_tree.
# Finally, if required, make a copy of the floppy.tree onto /fd

populate_mfs_tree() {
    local a dst

    log "populate_mfs_tree()"
    dst=${BUILDDIR}/mfs.tree
    # clean relics from old compilations.
    rm -rf ${dst} || true
    mkdir ${dst}

    log "pwd=`pwd`, Populating MFS tree..."

    # use type-specific mfs.mtree, default to generic one.
    a=${MY_TREE}/mfs.mtree
    [ -f ${a} ] || a=${PICO_TREE}/build/mfs.mtree
    log "Running mtree using $a..."
    mtree -deU -f $a -p ${dst} > /dev/null || fail $? mtree

    # XXX create links
    for i in ${STAND_LINKS}; do
	ln -s /stand ${dst}/$i
    done
    ln -s /dev/null ${dst}/var/run/log
    ln -s /etc/termcap ${dst}/usr/share/misc/termcap


    (
    cd ${BUILDDIR}/crunch
    log "Making and installing crunch1 from `pwd` src ${SRC}..."
    a=${BUILDDIR}/crunch1.conf
    ( export BUILDDIR SRC MY_TREE PICO_OBJ ;
	${BINMAKE} \
		-v -f ${PICO_TREE}/build/Makefile.conf ${BUILDDIR}/crunch.mk )
    log "Libs are ${LIBS} "
    export SRC # used by crunch.mk
    # export LIBS CFLAGS
    log "Now make -f crunch.mk"
    ${BINMAKE} ${o_makeopts} -f ${BUILDDIR}/crunch.mk
    strip --remove-section=.note --remove-section=.comment crunch1
    mv crunch1 ${dst}/stand/crunch
    chmod 555 ${dst}/stand/crunch
    log "Making links for binaries..."
    for i in `crunchgen -l $a` ; do
	ln ${dst}/stand/crunch ${dst}/stand/${i};
    done
    # rm $a # do not remove!
    ) || fail $? crunch

    if [ -f ${dst}/stand/sshd ] ; then
	log "Setting up host key for sshd:"
	if [ -f ${BUILDDIR}/floppy.tree/etc/ssh_host_key.gz ] ; then
	    log "Using existing host key"
	else
	    log "Generating new host key" 
	    ssh-keygen -t rsa1 -f ${BUILDDIR}/floppy.tree/etc/ssh_host_key \
		 -N "" -C "root@picobsd"
	    gzip -9 ${BUILDDIR}/floppy.tree/etc/ssh_host_key* || true
	fi
    fi

    log "Copy generic and site-specific MFS tree..."
    for MFS_TREE in ${PICO_TREE}/mfs_tree ${MY_TREE}/mfs_tree ; do
	if [ -d ${MFS_TREE} ] ; then
	    log "Copy ${MFS_TREE} ..."
	    (cd ${MFS_TREE} ; tar -cf - --exclude CVS --exclude .svn . ) | \
		    (cd ${dst} ; tar x${o_tarv}f - )
	fi
    done

    if [ "${o_all_in_mfs}" = "yes" ]; then
	log "Copy generic floppy_tree into MFS..."
	# this may fail in case the floppy is empty
	cp -Rp ${BUILDDIR}/floppy.tree/* ${dst}/fd || true
    fi

    if [ "${o_no_devfs}" != "" ] ; then
	# create device entries using MAKEDEV
	(cd ${dst}/dev
	ln -s ${SRC}/etc/MAKEDEV ; chmod 555 MAKEDEV
	# log `pwd`
	sh ./MAKEDEV ${MY_DEVS}
	rm MAKEDEV
	)
    fi
    if [ "`id -u`" = "0" ] ; then
	log "Fixing permissions"
	(cd ${dst}; chown -R root . )
    fi

    if [ -n "${import_files}" ] ; then
	log "importing ${import_files} into mfs"
	# We do it in a chroot environment on the target so
	# symlinks are followed correctly.
	cp `which tar` ${dst}/my_copy_of_tar
	(cd ${l_usrtree}/.. ; tar cf - ${import_files} ) | \
	    (chroot ${dst} /my_copy_of_tar xf - )
	rm ${dst}/my_copy_of_tar
    fi

    (cd ${BUILDDIR}
	# override the owner
	echo "/set uid=0 gid=0" > mtree.out
	mtree -c -p ${dst} -k "" >> mtree.out
	log "mtre.out at ${BUILDDIR}/mtree.out"
	makefs -t ffs -o bsize=4096 -o fsize=512 \
		-s ${MFS_SIZE}k -f 100 -F mtree.out ${c_fs} ${dst}
	ls -l ${c_fs} )
    log "done mfs image"
}

final_cleanup() {
    log "final_cleanup()"
    rm -rf ${c_mnt} ${c_reply} 2> /dev/null || true
    rm -f ${c_reply}
}

# fail errno errcode
# This function is used to trap errors and print msgs
#
fail() {
    local errno errocode where

    errno=$1
    errcode=$2
    where=$3
    echo "---> fail: Error <${errno}> error code <${errcode}> in <${where}>"
    case ${errcode} in
    mtree)
	echo "Error while making hierarchy in ${c_mnt}"
	;;
    crunch)
	echo "Error while building ${name}."
	;;
    missing_kernel)
	echo "Error: you must build PICOBSD${suffix} kernel first"
	;;
    includes)
	echo "Error: failed while making includes"
	;;
    libraries)
	echo "Error: failed while making libraries"
	;;
    bad_type)
	echo "Error: unknown floppy type ${name}"
	;;
    no_space)
	echo "Error: no space left on device (${where})"
	;;
    no_mfs)
	echo "Error: while writing MFS into the kernel."
	;;
    "")
	echo "User break"
	errcode="userbreak"
	;;
    *)
	echo "unknown error, maybe user break: $errno $errcode"
	;;
    esac
    echo "---> Aborting $0"
    # try to cleanup the vnode.
    final_cleanup
    exit 2
}

fill_floppy_image() {
    local blocks dst mfs_start mfs_end mfs_size img_size

    log "fill_floppy_image()"
    dst=${c_mnt}	# where to create the image

    log "Preparing ${fd_size}kB floppy filesystem..."

    # correct blocks according to size.
    blocks=${fd_size};
    if [ "${blocks}" = "1720" ]; then
	blocks=1722
    elif [ "${blocks}" = "1480" ]; then
	blocks=1476
    fi

    log "Labeling floppy image"
    log "patch ${c_boot2} to boot /kernel right away"
    b2=${BUILDDIR}/boot2 # modified boot2
    cp -f ${c_boot2} ${b2}
    chmod 0644 ${b2}

    set `strings -at d ${b2} | grep "/boot/loader"`
    echo -e "/kernel\0\0\0\0\0" | \
	dd of=${b2} obs=$1 oseek=1 conv=notrunc 2>/dev/null
    chmod 0444 ${b2}

    dst=${BUILDDIR}/image.tree
    rm -rf ${dst}
    mkdir -p ${dst}
    (
    cd ${BUILDDIR}
    set 0 0 # reset variables
    # $1 takes the offset of the MFS filesystem
    set `strings -at d kernel | grep "MFS Filesystem goes here"`
    mfs_start=$1
    set 0 0 # reset variables
    set `strings -at d kernel | grep "MFS Filesystem had better"`
    mfs_end=$1
    mfs_size="$((${mfs_end} - ${mfs_start}))"
    set -- `ls -l ${c_fs}`; imgsize="$5"
    if [ ${mfs_start} -gt 0 -a ${mfs_size} -ge ${imgsize} ] ; then
	mfs_ofs=$((${mfs_start} + 8192))
	log "Preload kernel with file ${c_fs} at ${mfs_ofs}"
	dd if=${c_fs} ibs=8192 iseek=1 of=kernel obs=${mfs_ofs} \
	    oseek=1 conv=notrunc 2> /dev/null
    else
    	log "not loading mfs, size ${mfs_size} img ${imgsize}"
    fi
    log "Compress with kgzip and copy to floppy image"
    kgzip -o kernel.gz kernel
    cp -p kernel.gz ${dst}/kernel || fail $? no_space "copying kernel"

    log "Now transfer floppy tree if not already in MFS image"
    # now transfer the floppy tree. If it is already in mfs, dont bother.
    if [ "${o_all_in_mfs}" != "yes" ] ; then
	cp -Rp floppy.tree/* ${dst} || \
		fail $? no_space "copying floppy tree"
    fi
    )
    (cd ${BUILDDIR}
    makefs -t ffs -o bsize=4096 -o fsize=512 \
	-s ${blocks}k -f 50 ${c_img} ${dst}
    # ${l_label} -f `pwd`/${c_img}
    ${l_label} -w -f `pwd`/${c_img} auto # write in a label
    # copy partition c: into a: with some sed magic
    ${l_label} -f `pwd`/${c_img} | sed -e '/  c:/{p;s/c:/a:/;}' | \
	${l_label} -R -f `pwd`/${c_img} /dev/stdin
    ${l_label} -f `pwd`/${c_img}
    ls -l ${c_img}
	logverbose "after disklabel"
	 )
    # dump the primary and secondary boot
    # XXX primary is 512 bytes
    dd if=${c_boot1} of=${BUILDDIR}/${c_img} conv=notrunc 2>/dev/null
    # XXX secondary starts after the 0x114 = dec 276 bytes of the label
    # so we skip 276 from the source, and 276+512=788 from dst
    # the old style blocks used 512 and 1024 respectively

    dd if=${b2} iseek=1 ibs=276 2> /dev/null | \
	dd of=${BUILDDIR}/${c_img} oseek=1 obs=788 conv=notrunc 2>/dev/null
    logverbose "done floppy image"
    # XXX (log "Fixing permissions"; cd ${dst}; chown -R root *)
    rm -rf ${BUILDDIR}/floppy.tree || true # cleanup
    # df -ik ${dst} | colrm 70 > .build.reply
    rm -rf ${dst}
    rm ${BUILDDIR}/kernel.gz ${BUILDDIR}/${c_fs}
}

# This function creates variables which depend on the source tree in use:
# SRC, l_usrtree, l_objtree
# Optionally creates libraries, includes and the like (for cross compiles,
# needs to be done once).

set_build_parameters() {
    log "set_build_parameters() SRC is ${SRC}"
    if [ "${SRC}" = "/usr/src" ] ; then
	l_usrtree=${USR:-/usr}
    else
	l_usrtree=${USR:-${SRC}/../usr}
    fi
    l_objtree=${l_usrtree}/obj-pico
    PICO_TREE=${PICO_TREE:-${SRC}/release/picobsd}
    set `grep "#define[\t ]__FreeBSD_version" ${SRC}/sys/sys/param.h`
    OSVERSION=$3
    log "OSVERSION is ${OSVERSION}"
    if [ "${o_init_src}" != "" ] ; then
	if [ ${OSVERSION} -lt 500035 ] ; then
	    create_includes_and_libraries
	else
	    create_includes_and_libraries2
	fi
    fi
    if [ ${OSVERSION} -lt 500035 ] ; then
	# Create the right LIBS and CFLAGS for further builds.
	# and build the config program
	LIBS="-L${l_usrtree}/lib"
	CFLAGS="-nostdinc -I${l_usrtree}/include"
	export LIBS CFLAGS
	CONFIG=${l_usrtree}/sbin/config
	export CONFIG
    fi
}

#-------------------------------------------------------------------
# Main entry of the script. Initialize variables, parse command line
# arguments.

set_defaults
args=""
while [ x"$1" != x ]; do
    case $1 in
    --src)	# set the source path instead of /usr/src
	SRC=`(cd $2; pwd)`
	shift
	;;
    --init)
	o_init_src="YES"
	;;

    --floppy_size)
	fd_size=$2
	shift
	;;

    --all_in_mfs)
	o_all_in_mfs="yes"
	;;

    --no_all_in_mfs)
	o_all_in_mfs=""
	;;

    --modules)	# also build kernel modules
	o_do_modules="yes"
	;;
    -n)
	o_interactive="NO"
	;;

    -clear|-clean|-c) # clean
	o_clean="YES"
	o_interactive="NO"
	;;

    -v) # need -v -v to wait for user input
	o_verbose=$((${o_verbose}+1))	# verbose level
	o_tarv="v"			# tar verbose flag
	o_makeopts="-d l" # be verbose
	;;
    *)
	args="$args $1"			# accumulate args
	;;

    esac
    shift
done
set_build_parameters	# things that depend on ${SRC}

# If $1="package", it creates a neat set of floppies
set -- ${args}
[ "$1" = "package" ] && build_package

set_type $args		# type and site, respectively

[ "${o_interactive}" != "NO" ] && main_dialog

if [ "${o_clean}" = "YES" ] ; then
    clean_tree
else
    build_image
    do_install
fi
final_cleanup
exit 0