#!/bin/sh
#
# This script generates a "memstick image" (image that can be copied to a
# USB memory stick) from a directory tree.  Note that the script does not
# clean up after itself very well for error conditions on purpose so the
# problem can be diagnosed (full filesystem most likely but ...).
#
# Usage: make-memstick.sh <directory tree> <image filename>
#
# $FreeBSD: stable/11/release/i386/make-memstick.sh 324395 2017-10-07 20:14:30Z emaste $
#

set -e

setglobal PATH = '/bin:/usr/bin:/sbin:/usr/sbin'
export PATH

if test $Argc -ne 2 {
	echo "make-memstick.sh /path/to/directory /path/to/image/file"
	exit 1
}

if test ! -d $(1) {
	echo "$(1) must be a directory"
	exit 1
}

if test -e $(2) {
	echo "won't overwrite $(2)"
	exit 1
}

echo '/dev/ufs/FreeBSD_Install / ufs ro,noatime 1 1' > $(1)/etc/fstab
echo 'root_rw_mount="NO"' > $(1)/etc/rc.conf.local
makefs -B little -o label=FreeBSD_Install -o version=2 $(2).part $(1)
rm $(1)/etc/fstab
rm $(1)/etc/rc.conf.local

mkimg -s gpt -b $(1)/boot/pmbr -p freebsd-boot:=$(1)/boot/gptboot -p freebsd-ufs:=$(2).part -p freebsd-swap::1M -o $(2)
rm $(2).part