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#!/bin/sh
#-
# Copyright (c) 2011 Nathan Whitehorn
# Copyright (c) 2013 Devin Teske
# 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.
#
# $FreeBSD$
#
############################################################ INCLUDES

BSDCFG_SHARE="/usr/share/bsdconfig"
. $BSDCFG_SHARE/common.subr || exit 1
f_include $BSDCFG_SHARE/dialog.subr

############################################################ FUNCTIONS

error() {
	local msg
	if [ -n "$1" ]; then
		msg="$1\n\n"
	fi
	test -n "$DISTDIR_IS_UNIONFS" && umount -f $BSDINSTALL_DISTDIR
	test -f $PATH_FSTAB && bsdinstall umount
	dialog --backtitle "FreeBSD Installer" --title "Abort" \
	    --no-label "Exit" --yes-label "Restart" --yesno \
	    "${msg}An installation step has been aborted. Would you like to restart the installation or exit the installer?" 0 0
	if [ $? -ne 0 ]; then
		exit 1
	else
		exec $0
	fi
}

hline_arrows_tab_enter="Press arrows, TAB or ENTER"
msg_gpt_active_fix="Your hardware is known to have issues booting in CSM/Legacy/BIOS mode from GPT partitions that are not set active. Would you like the installer to apply this workaround for you?"
msg_lenovo_fix="Your model of Lenovo is known to have a BIOS bug that prevents it booting from GPT partitions without UEFI. Would you like the installer to apply a workaround for you?"
msg_no="NO"
msg_yes="YES"

# dialog_workaround
#
# Ask the user if they wish to apply a workaround
#
dialog_workaround()
{
	local passed_msg="$1"
	local title="$DIALOG_TITLE"
	local btitle="$DIALOG_BACKTITLE"
	local prompt # Calculated below
	local hline="$hline_arrows_tab_enter"

	local height=8 width=50 prefix="   "
	local plen=${#prefix} list= line=
	local max_width=$(( $width - 3 - $plen ))

	local yes no defaultno extra_args format
	if [ "$USE_XDIALOG" ]; then
		yes=ok no=cancel defaultno=default-no
		extra_args="--wrap --left"
		format="$passed_msg"
	else
		yes=yes no=no defaultno=defaultno
		extra_args="--cr-wrap"
		format="$passed_msg"
	fi

	# Add height for Xdialog(1)
	[ "$USE_XDIALOG" ] && height=$(( $height + $height / 5 + 3 ))

	prompt=$( printf "$format" )
	f_dprintf "%s: Workaround prompt" "$0"
	$DIALOG \
		--title "$title"        \
		--backtitle "$btitle"   \
		--hline "$hline"        \
		--$yes-label "$msg_yes" \
		--$no-label "$msg_no"   \
		$extra_args             \
		--yesno "$prompt" $height $width
}

############################################################ MAIN

f_dprintf "Began Installation at %s" "$( date )"

rm -rf $BSDINSTALL_TMPETC
mkdir $BSDINSTALL_TMPETC

trap true SIGINT	# This section is optional
bsdinstall keymap

trap error SIGINT	# Catch cntrl-C here
bsdinstall hostname || error "Set hostname failed"

export DISTRIBUTIONS="base.txz kernel.txz"
if [ -f $BSDINSTALL_DISTDIR/MANIFEST ]; then
	DISTMENU=`awk -F'\t' '!/^(kernel\.txz|base\.txz)/{print $1,$5,$6}' $BSDINSTALL_DISTDIR/MANIFEST`
	DISTMENU="$(echo ${DISTMENU} | sed -E 's/\.txz//g')"

	exec 3>&1
	EXTRA_DISTS=$( eval dialog \
	    --backtitle \"FreeBSD Installer\" \
	    --title \"Distribution Select\" --nocancel --separate-output \
	    --checklist \"Choose optional system components to install:\" \
	    0 0 0 $DISTMENU \
	2>&1 1>&3 )
	for dist in $EXTRA_DISTS; do
		export DISTRIBUTIONS="$DISTRIBUTIONS $dist.txz"
	done
fi

LOCAL_DISTRIBUTIONS="MANIFEST"
FETCH_DISTRIBUTIONS=""
for dist in $DISTRIBUTIONS; do
	if [ ! -f $BSDINSTALL_DISTDIR/$dist ]; then
		FETCH_DISTRIBUTIONS="$FETCH_DISTRIBUTIONS $dist"
	else
		LOCAL_DISTRIBUTIONS="$LOCAL_DISTRIBUTIONS $dist"
	fi
done
LOCAL_DISTRIBUTIONS=`echo $LOCAL_DISTRIBUTIONS`	# Trim white space
FETCH_DISTRIBUTIONS=`echo $FETCH_DISTRIBUTIONS`	# Trim white space

if [ -n "$FETCH_DISTRIBUTIONS" -a -n "$BSDINSTALL_CONFIGCURRENT" ]; then
	dialog --backtitle "FreeBSD Installer" --title "Network Installation" --msgbox "Some installation files were not found on the boot volume. The next few screens will allow you to configure networking so that they can be downloaded from the Internet." 0 0
	bsdinstall netconfig || error
	NETCONFIG_DONE=yes
fi

if [ -n "$FETCH_DISTRIBUTIONS" ]; then
	exec 3>&1
	BSDINSTALL_DISTSITE=$(`dirname $0`/mirrorselect 2>&1 1>&3)
	MIRROR_BUTTON=$?
	exec 3>&-
	test $MIRROR_BUTTON -eq 0 || error "No mirror selected"
	export BSDINSTALL_DISTSITE
fi

rm -f $PATH_FSTAB
touch $PATH_FSTAB

#
# Try to detect known broken platforms and apply their workarounds
#

if f_interactive; then
	sys_maker=$( kenv -q smbios.system.maker )
	f_dprintf "smbios.system.maker=[%s]" "$sys_maker"
	sys_model=$( kenv -q smbios.system.product )
	f_dprintf "smbios.system.product=[%s]" "$sys_model"
	sys_version=$( kenv -q smbios.system.version )
	f_dprintf "smbios.system.version=[%s]" "$sys_version"
	sys_mb_maker=$( kenv -q smbios.planar.maker )
	f_dprintf "smbios.planar.maker=[%s]" "$sys_mb_maker"
	sys_mb_product=$( kenv -q smbios.planar.product )
	f_dprintf "smbios.planar.product=[%s]" "$sys_mb_product"

	#
	# Laptop Models
	#
	case "$sys_maker" in
	"LENOVO")
		case "$sys_version" in
		"ThinkPad X220"|"ThinkPad T420"|"ThinkPad T520"|"ThinkPad W520"|"ThinkPad X1")
			dialog_workaround "$msg_lenovo_fix"
			retval=$?
			f_dprintf "lenovofix_prompt=[%s]" "$retval"
			if [ $retval -eq $DIALOG_OK ]; then
				export ZFSBOOT_PARTITION_SCHEME="GPT + Lenovo Fix"
				export WORKAROUND_LENOVO=1
			fi
			;;
		esac
		;;
	"Dell Inc.")
		case "$sys_model" in
		"Latitude E6330"|"Latitude E7440"|"Latitude E7240"|"Precision Tower 5810")
			dialog_workaround "$msg_gpt_active_fix"
			retval=$?
			f_dprintf "gpt_active_fix_prompt=[%s]" "$retval"
			if [ $retval -eq $DIALOG_OK ]; then
				export ZFSBOOT_PARTITION_SCHEME="GPT + Active"
				export WORKAROUND_GPTACTIVE=1
			fi
			;;
		esac
		;;
	"Hewlett-Packard")
		case "$sys_model" in
		"HP ProBook 4330s")
			dialog_workaround "$msg_gpt_active_fix"
			retval=$?
			f_dprintf "gpt_active_fix_prompt=[%s]" "$retval"
			if [ $retval -eq $DIALOG_OK ]; then
				export ZFSBOOT_PARTITION_SCHEME="GPT + Active"
				export WORKAROUND_GPTACTIVE=1
			fi
			;;
		esac
		;;
	esac
	#
	# Motherboard Models
	#
	case "$sys_mb_maker" in
	"Intel Corporation")
		case "$sys_mb_product" in
		"DP965LT"|"D510MO")
			dialog_workaround "$msg_gpt_active_fix"
			retval=$?
			f_dprintf "gpt_active_fix_prompt=[%s]" "$retval"
			if [ $retval -eq $DIALOG_OK ]; then
				export ZFSBOOT_PARTITION_SCHEME="GPT + Active"
				export WORKAROUND_GPTACTIVE=1
			fi
			;;
		esac
		;;
	"Acer")
		case "$sys_mb_product" in
		"Veriton M6630G")
			dialog_workaround "$msg_gpt_active_fix"
			retval=$?
			f_dprintf "gpt_active_fix_prompt=[%s]" "$retval"
			if [ $retval -eq $DIALOG_OK ]; then
				export ZFSBOOT_PARTITION_SCHEME="GPT + Active"
				export WORKAROUND_GPTACTIVE=1
			fi
			;;
		esac
		;;
	esac
fi

PMODES="\
\"Auto (UFS)\" \"Guided Disk Setup\" \
Manual \"Manual Disk Setup (experts)\" \
Shell \"Open a shell and partition by hand\""

CURARCH=$( uname -m )
case $CURARCH in
	amd64|arm64|i386)	# Booting ZFS Supported
		PMODES="$PMODES \"Auto (ZFS)\" \"Guided Root-on-ZFS\""
		;;
	*)		# Booting ZFS Unspported
		;;
esac

exec 3>&1
PARTMODE=`echo $PMODES | xargs dialog --backtitle "FreeBSD Installer" \
	--title "Partitioning" \
	--menu "How would you like to partition your disk?" \
	0 0 0 2>&1 1>&3` || exit 1
exec 3>&-

case "$PARTMODE" in
"Auto (UFS)")	# Guided
	bsdinstall autopart || error "Partitioning error"
	bsdinstall mount || error "Failed to mount filesystem"
	;;
"Shell")	# Shell
	clear
	echo "Use this shell to set up partitions for the new system. When finished, mount the system at $BSDINSTALL_CHROOT and place an fstab file for the new system at $PATH_FSTAB. Then type 'exit'. You can also enter the partition editor at any time by entering 'bsdinstall partedit'."
	sh 2>&1
	;;
"Manual")	# Manual
	if f_isset debugFile; then
		# Give partedit the path to our logfile so it can append
		BSDINSTALL_LOG="${debugFile#+}" bsdinstall partedit || error "Partitioning error"
	else
		bsdinstall partedit || error "Partitioning error"
	fi
	bsdinstall mount || error "Failed to mount filesystem"
	;;
"Auto (ZFS)")	# ZFS
	bsdinstall zfsboot || error "ZFS setup failed"
	bsdinstall mount || error "Failed to mount filesystem"
	;;
*)
	error "Unknown partitioning mode"
	;;
esac

if [ ! -z "$FETCH_DISTRIBUTIONS" ]; then
	ALL_DISTRIBUTIONS="$DISTRIBUTIONS"
	WANT_DEBUG=

	# Download to a directory in the new system as scratch space
	BSDINSTALL_FETCHDEST="$BSDINSTALL_CHROOT/usr/freebsd-dist"
	mkdir -p "$BSDINSTALL_FETCHDEST" || error "Could not create directory $BSDINSTALL_FETCHDEST"

	export DISTRIBUTIONS="$FETCH_DISTRIBUTIONS"
	# Try to use any existing distfiles
	if [ -d $BSDINSTALL_DISTDIR ]; then
		DISTDIR_IS_UNIONFS=1
		mount_nullfs -o union "$BSDINSTALL_FETCHDEST" "$BSDINSTALL_DISTDIR"
	else
		export DISTRIBUTIONS="$FETCH_DISTRIBUTIONS"
		export BSDINSTALL_DISTDIR="$BSDINSTALL_FETCHDEST"
	fi
		
	export FTP_PASSIVE_MODE=YES
	# Iterate through the distribution list and set a flag if debugging
	# distributions have been selected.
	for _DISTRIBUTION in $DISTRIBUTIONS; do
		case $_DISTRIBUTION in
			*-dbg.*)
				[ -e $BSDINSTALL_DISTDIR/$_DISTRIBUTION ] \
					&& continue
				WANT_DEBUG=1
				DEBUG_LIST="\n$DEBUG_LIST\n$_DISTRIBUTION"
				;;
			*)
				;;
		esac
	done

	# Fetch the distributions.
	bsdinstall distfetch
	rc=$?

	if [ $rc -ne 0 ]; then
		# If unable to fetch the remote distributions, recommend
		# deselecting the debugging distributions, and retrying the
		# installation, since failure to fetch *-dbg.txz should not
		# be considered a fatal installation error.
		msg="Failed to fetch remote distribution"
		if [ ! -z "$WANT_DEBUG" ]; then
			# Trim leading and trailing newlines.
			DEBUG_LIST="${DEBUG_LIST%%\n}"
			DEBUG_LIST="${DEBUG_LIST##\n}"
			msg="$msg\n\nPlease deselect the following distributions"
			msg="$msg and retry the installation:"
			msg="$msg\n$DEBUG_LIST"
		fi
		error "$msg"
	fi
	export DISTRIBUTIONS="$ALL_DISTRIBUTIONS"
fi

if [ ! -z "$LOCAL_DISTRIBUTIONS" ]; then
	# Download to a directory in the new system as scratch space
	BSDINSTALL_FETCHDEST="$BSDINSTALL_CHROOT/usr/freebsd-dist"
	mkdir -p "$BSDINSTALL_FETCHDEST" || error "Could not create directory $BSDINSTALL_FETCHDEST"
	# Try to use any existing distfiles
	if [ -d $BSDINSTALL_DISTDIR ]; then
		DISTDIR_IS_UNIONFS=1
		mount_nullfs -o union "$BSDINSTALL_FETCHDEST" "$BSDINSTALL_DISTDIR"
		export BSDINSTALL_DISTDIR="$BSDINSTALL_FETCHDEST"
	fi
	env DISTRIBUTIONS="$LOCAL_DISTRIBUTIONS" \
		BSDINSTALL_DISTSITE="file:///usr/freebsd-dist" \
		bsdinstall distfetch || \
		error "Failed to fetch distribution from local media"
fi

bsdinstall checksum || error "Distribution checksum failed"
bsdinstall distextract || error "Distribution extract failed"
bsdinstall rootpass || error "Could not set root password"

trap true SIGINT	# This section is optional
if [ "$NETCONFIG_DONE" != yes ]; then
	bsdinstall netconfig	# Don't check for errors -- the user may cancel
fi
bsdinstall time
bsdinstall services
bsdinstall hardening

dialog --backtitle "FreeBSD Installer" --title "Add User Accounts" --yesno \
    "Would you like to add users to the installed system now?" 0 0 && \
    bsdinstall adduser

finalconfig() {
	exec 3>&1
	REVISIT=$(dialog --backtitle "FreeBSD Installer" \
	    --title "Final Configuration" --no-cancel --menu \
	    "Setup of your FreeBSD system is nearly complete. You can now modify your configuration choices. After this screen, you will have an opportunity to make more complex changes using a shell." 0 0 0 \
		"Exit" "Apply configuration and exit installer" \
		"Add User" "Add a user to the system" \
		"Root Password" "Change root password" \
		"Hostname" "Set system hostname" \
		"Network" "Networking configuration" \
		"Services" "Set daemons to run on startup" \
		"System Hardening" "Set security options" \
		"Time Zone" "Set system timezone" \
		"Handbook" "Install FreeBSD Handbook (requires network)" 2>&1 1>&3)
	exec 3>&-

	case "$REVISIT" in
	"Add User")
		bsdinstall adduser
		finalconfig
		;;
	"Root Password")
		bsdinstall rootpass 
		finalconfig
		;;
	"Hostname")
		bsdinstall hostname
		finalconfig
		;;
	"Network")
		bsdinstall netconfig
		finalconfig
		;;
	"Services")
		bsdinstall services
		finalconfig
		;;
	"System Hardening")
		bsdinstall hardening
		finalconfig
		;;
	"Time Zone")
		bsdinstall time
		finalconfig
		;;
	"Handbook")
		bsdinstall docsinstall
		finalconfig
		;;
	esac
}

# Allow user to change his mind
finalconfig

trap error SIGINT	# SIGINT is bad again
bsdinstall config  || error "Failed to save config"

if [ -n "$DISTDIR_IS_UNIONFS" ]; then
	umount -f $BSDINSTALL_DISTDIR
fi

if [ ! -z "$BSDINSTALL_FETCHDEST" ]; then
	rm -rf "$BSDINSTALL_FETCHDEST"
fi

dialog --backtitle "FreeBSD Installer" --title "Manual Configuration" \
    --default-button no --yesno \
   "The installation is now finished. Before exiting the installer, would you like to open a shell in the new system to make any final manual modifications?" 0 0
if [ $? -eq 0 ]; then
	clear
	echo This shell is operating in a chroot in the new system. \
	    When finished making configuration changes, type \"exit\".
	chroot "$BSDINSTALL_CHROOT" /bin/sh 2>&1
fi

bsdinstall entropy
bsdinstall umount

f_dprintf "Installation Completed at %s" "$( date )"

################################################################################
# END
################################################################################