freebsd-dev/release/amd64/make-memstick.sh
Rebecca Cran db8b561345 Rework UEFI ESP generation
Currently, the installer uses pre-created 800KB FAT12 filesystems that
it dd's onto the ESP partition.
This changeset improves that by having the installer generate a FAT32
filesystem directly onto the ESP using newfs_msdos and then copying
loader.efi into /EFI/freebsd.
For live installs it then runs efibootmgr to add a FreeBSD boot entry
in the BIOS.

Sponsored by:	Netflix
Differential Revision:	https://reviews.freebsd.org/D17947
2018-12-20 19:39:37 +00:00

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#!/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>
#
# $FreeBSD$
#
set -e
scriptdir=$(dirname $(realpath $0))
. ${scriptdir}/../../tools/boot/install-boot.sh
PATH=/bin:/usr/bin:/sbin:/usr/sbin
export PATH
if [ $# -ne 2 ]; then
echo "make-memstick.sh /path/to/directory /path/to/image/file"
exit 1
fi
if [ ! -d ${1} ]; then
echo "${1} must be a directory"
exit 1
fi
if [ -e ${2} ]; then
echo "won't overwrite ${2}"
exit 1
fi
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 ${1}/etc/rc.conf.local
# Make an ESP in a file.
espfilename=$(mktemp /tmp/efiboot.XXXXXX)
make_esp_file ${espfilename} ${fat32min} ${1}/boot/loader.efi
mkimg -s mbr \
-b ${1}/boot/mbr \
-p efi:=${espfilename} \
-p freebsd:-"mkimg -s bsd -b ${1}/boot/boot -p freebsd-ufs:=${2}.part" \
-a 2 \
-o ${2}
rm ${espfilename}
rm ${2}.part