#!/bin/sh
#-
# Copyright (c) 2018 Rebecca Cran
# Copyright (c) 2017 Nathan Whitehorn
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions
# are met:
# 1. Redistributions of source code must retain the above copyright
#    notice, this list of conditions and the following disclaimer.
# 2. Redistributions in binary form must reproduce the above copyright
#    notice, this list of conditions and the following disclaimer in the
#    documentation and/or other materials provided with the distribution.
#
# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
# ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
# SUCH DAMAGE.
#
# $FreeBSD$


FREEBSD_BOOTLABEL="FreeBSD"

BSDCFG_SHARE="/usr/share/bsdconfig"
. $BSDCFG_SHARE/common.subr || exit 1
f_dprintf "%s: loading_includes..." "$0"
f_include $BSDCFG_SHARE/dialog.subr

: ${TMPDIR:="/tmp"}

die() {
	echo $*
	exit 1
}

dialog_uefi_entryname()
{
	local prompt="Please enter a name for the new entry"
	local hline=
	local value="$*"
	local height width

	f_dialog_inputbox_size height width \
		"$DIALOG_TITLE" "$DIALOG_BACKTITLE" "$prompt" "$value" "$hline"

	$DIALOG \
		--title "$DIALOG_TITLE"         \
		--backtitle "$DIALOG_BACKTITLE" \
		--hline "$hline"                \
		--ok-label "Ok"                 \
		--no-cancel                     \
		--inputbox "$prompt"            \
		$height $width "$value"         \
		2>&1 >&$DIALOG_TERMINAL_PASSTHRU_FD
}

update_uefi_bootentry()
{
	nentries=$(efibootmgr | grep -c 'FreeBSD$')
	# No entries so directly create one and return
	if [ ${nentries} -eq 0 ]; then
		f_dprintf "Creating UEFI boot entry"
		efibootmgr --create --activate --label "$FREEBSD_BOOTLABEL" --loader "${mntpt}/${FREEBSD_BOOTNAME}" > /dev/null
		return
	fi

	$DIALOG --backtitle 'FreeBSD Installer' --title 'Boot configuration' \
	    --yesno 'There is multiple "FreeBSD" efi boot entries, would you like to remove them all and add a new one?' 0 0
	if [ $? -eq $DIALOG_OK ]; then
		for entry in $(efibootmgr | awk '$NF == "FreeBSD" { sub(/.*Boot/,"", $1); sub(/\*/,"", $1); print $1 }'); do
			efibootmgr -B -b ${entry}
		done
		efibootmgr --create --activate --label "$FREEBSD_BOOTLABEL" --loader "${mntpt}/${FREEBSD_BOOTNAME}" > /dev/null
		return
	fi

	FREEBSD_BOOTLABEL=$(dialog_uefi_entryname "${FREEBSD_BOOTLABEL}")
	[ $? -eq $DIALOG_CANCEL ] && exit 1
	efibootmgr --create --activate --label "$FREEBSD_BOOTLABEL" --loader "${mntpt}/${FREEBSD_BOOTNAME}" > /dev/null
}

f_dialog_title "Boot configuration"
f_dialog_backtitle "FreeBSD Installer"

if [ `uname -m` == powerpc ]; then
	platform=`sysctl -n hw.platform`
	if [ "$platform" == ps3 -o "$platform" == powernv ]; then
		rootpart=$(awk '{ if($2 == "/") printf("%s:%s\n", $3, $1); }' $PATH_FSTAB)
		kboot_conf=$BSDINSTALL_CHROOT/boot/etc/kboot.conf
		mkdir -p $BSDINSTALL_CHROOT/boot/etc/
		echo default=$FREEBSD_BOOTLABEL > $kboot_conf
		echo $FREEBSD_BOOTLABEL=\'/kernel/kernel kernelname=/boot/kernel/kernel vfs.root.mountfrom=${rootpart}\' >> $kboot_conf
	fi
fi

# Update the ESP (EFI System Partition) with the new bootloader if we have an ESP
if [ -n "$(awk '{if ($2=="/boot/efi") printf("%s\n",$1);}' $PATH_FSTAB)" ]; then
	case $(uname -m) in
	    arm64)	ARCHBOOTNAME=aa64 ;;
	    amd64)	ARCHBOOTNAME=x64 ;;
	    riscv)	ARCHBOOTNAME=riscv64 ;;
    #	    arm)	ARCHBOOTNAME=arm ;; # No other support for arm install
    #	    i386)	ARCHBOOTNAME=ia32 ;; # no support for this in i386 kernels, rare machines
	    *)		die "Unsupported arch $(uname -m) for UEFI install"
	esac
	BOOTDIR="/efi/boot"
	BOOTNAME="${BOOTDIR}/boot${ARCHBOOTNAME}.efi"
	FREEBSD_BOOTDIR="/efi/freebsd"
	FREEBSD_BOOTNAME="${FREEBSD_BOOTDIR}/loader.efi"
	mntpt="$BSDINSTALL_CHROOT/boot/efi"

	f_dprintf "Installing loader.efi onto ESP"
	mkdir -p "${mntpt}/${FREEBSD_BOOTDIR}" "${mntpt}/${BOOTDIR}"
	cp "$BSDINSTALL_CHROOT/boot/loader.efi" "${mntpt}/${FREEBSD_BOOTNAME}"

	#
	# The following shouldn't be necessary. UEFI defines a way to
	# specifically select what to boot (which we do via
	# efibootmgr). However, virtual environments often times lack
	# support for the NV variables efibootmgr sets. In addition,
	# some UEFI implementations have features that interfere with
	# the setting of these variables. To combat that, we install the
	# default removable media boot file as a fallback if it doesn't
	# exist. We don't install it all the time since that can
	# interfere with other installations on the drive (like rEFInd).
	#
	if [ ! -f "${mntpt}/${BOOTNAME}" ]; then
		cp "$BSDINSTALL_CHROOT/boot/loader.efi" "${mntpt}/${BOOTNAME}"
	fi

	if [ "$BSDINSTALL_CONFIGCURRENT" ]; then
		update_uefi_bootentry
	fi

	f_dprintf "Finished configuring ESP"
fi

# Add boot0cfg for MBR BIOS booting?