#	$OpenBSD: install.sub,v 1.405 2006/07/26 20:34:11 deraadt Exp $
#	$NetBSD: install.sub,v 1.5.2.8 1996/09/02 23:25:02 pk Exp $
#
# Copyright (c) 1997-2006 Todd Miller, Theo de Raadt, Ken Westerback
# 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 ``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 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.
#
# Copyright (c) 1996 The NetBSD Foundation, Inc.
# All rights reserved.
#
# This code is derived from software contributed to The NetBSD Foundation
# by Jason R. Thorpe.
#
# 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.
# 3. All advertising materials mentioning features or use of this software
#    must display the following acknowledgement:
#        This product includes software developed by the NetBSD
#        Foundation, Inc. and its contributors.
# 4. Neither the name of The NetBSD Foundation nor the names of its
#    contributors may be used to endorse or promote products derived
#    from this software without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. 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 REGENTS 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.
#

# OpenBSD install/upgrade script common subroutines and initialization code

# Include machine-dependent functions and definitions.
#
# The following functions must be provided:
#	md_congrats()		  - display friendly message
#	md_installboot()	  - install boot-blocks on disk
#	md_prep_disklabel()	  - put an OpenBSD disklabel on the disk
#
# The following variables can be provided if required:
#	MDSETS	    - list of files to add to THESETS
#	MDTERM      - 'vt220' assumed if not provided
#	MDFSTYPE    - nothing assumed if not provided
#	MDFSOPTS    - nothing assumed if not provided
#	MDDKDEVS    - '/^[sw]d[0-9][0-9]* /s/ .*//p' assumed if not provided
#	MDCDDEVS    - '/^cd[0-9][0-9]* /s/ .*//p'    assumed if not provided
#	MDMTDEVS    - '/^[cmsw]t[0-9][0-9]* /s/ .*//p'
#	MDSERIAL    - offer to configure a serial console
#	MDXAPERTURE - set machdep.allowaperture=value in sysctl.conf
. install.md

set_term() {
	local _tables

	TERM=${TERM:-${MDTERM:-vt220}}
	ask "Terminal type?" $TERM
	export TERM=$resp

	[[ -x /sbin/kbd ]] || return
	_tables=$(bsort $(kbd -l | egrep -v "^(user|tables|encoding)"))
	while :; do
		ask "kbd(8) mapping? ('L' for list)" "none"
		case $resp in
		[Ll?])	echo "Major tables: $_tables" ;;
		none)	return ;;
		*)	kbd $resp && { echo $resp >/tmp/kbdtype ; return ; } ;;
		esac
	done
}

welcome() {
	local _q

	cat <<__EOT

Welcome to the $OBSD $MODE program.

This program will help you $MODE OpenBSD in a simple and rational way. At
any prompt except password prompts you can run a shell command by typing
'!foo', or escape to a shell by typing '!'. Default answers are shown in []'s
and are selected by pressing RETURN. At any time you can exit this program by
pressing Control-C and then RETURN, but quitting during an $MODE can leave
your system in an inconsistent state.

__EOT

	# Configure the terminal and keyboard.
	set_term

	cat <<__EOT

IS YOUR DATA BACKED UP? As with anything that modifies disk contents, this
program can cause SIGNIFICANT data loss.

__EOT

	case $MODE in
	upgrade)
		cat <<__EOT
NOTE: once your system has been upgraded, you must manually merge any changes
to files in the 'etc' set into the files already on your system.

__EOT
		_q="Proceed with upgrade?"
		;;

	install)
		cat <<__EOT
It is often helpful to have the installation notes handy. For complex disk
configurations, relevant disk hardware manuals and a calculator are useful.

__EOT

		if [ -f /etc/fstab ]; then
			cat <<__EOT
You seem to be trying to restart an interrupted installation! You can skip
the disk preparation steps and continue, or you can reboot and start over.

__EOT
			_q="Skip disk initialization?"
		else
			_q="Proceed with install?"
		fi
		;;
	esac

	ask_yn "$_q"
	if [[ $resp == n ]]; then
		cat <<__EOT

Enter 'halt' at the prompt to gracefully exit OpenBSD. You can then
power cycle the machine and boot your original OS.
__EOT
		exit
	fi

	echo "Cool! Let's get to it."
}

# Echo the file $1 to standard output, skipping any lines that begin with a
# '#'. i.e. strip comment lines from the file.
stripcom () {
	local _l

	[[ -f $1 ]] || return

	while read _l; do
		[[ -n ${_l%%#*} ]] && echo $_l
	done <$1
}
		
scan_dmesg() {
	bsort $(sed -ne "$1" /var/run/dmesg.boot)
}

get_ifdevs() {
	ifconfig -a \
	    | egrep -v '^[[:space:]]|(bridge|enc|gif|gre|lo|pflog|pfsync|ppp|sl|tun|vlan)[[:digit:]]+:' \
	    | sed -ne 's/^\(.*\):.*/\1/p'
}

# Get the first (lowest unit #) serial device if any, if MDSERIAL is set.
#
# MDSERIAL is of the form
#
# "<dmesg device prefix> <boot loader device prefix> <tty device prefix>"
#
# So "pccom com tty0" means the dmesg is searched for devices pccom0, pccom1,
# ... pccom9. If pccom2 is found, then com2 and tty02 are used in serial
# console configuration via boot.conf commands and /etc/ttys.
#
# NOTE: Only single digit serial devices (<dev>0 -> <dev>9) are looked for.
get_serialdev() {
	local _d _bd _td

	[[ -n $MDSERIAL ]] || exit
	set -- $MDSERIAL
	_d=$1
	_bd=$2
	_td=$3
	set -- $(scan_dmesg "/^${_d}\([0-9]\) .*/s//\1/p")
	echo "$_bd$1 $_td$1"
}

get_drive() {
	ask_which "$1" "contains the $MODE media" "$2"
	[[ $resp == done ]] && return 1
	makedev $resp || return 1
	return 0
}

get_partition() {
	local _drive=$1 _fstypes=$2 _part _fst

	# Create file /tmp/parts.$_drive where each line is of the
	# form "<partition letter> <fs type>".
	disklabel $_drive 2>/dev/null		\
		| grep '^  [a-p]: '		\
		| egrep -v "swap|unused"	\
		| sed -e 's/^  \(.\):  *[^ ]*  *[^ ]*  *\([^ ]*\) .*/\1 \2/' \
		>/tmp/parts.$_drive

	disklabel $_drive 2>/dev/null | grep '^  .:'

	ask_which "$_drive partition" "has the $MODE sets" \
		 "$(sed -e 's/^\(.\).*/\1/' /tmp/parts.$_drive)"
	[[ $resp == done ]] && return 1

	_part=$resp
	_fst=$(sed -ne "/^$_part /s///p" /tmp/parts.$_drive)

	ask_which "filesystem type" "should be used to mount $_drive$_part" "$_fst $_fstypes ffs"
	case $resp in
	done)	return 1 ;;
	$_fst)	resp="$_part" ;;
	*)	resp="$_part $resp" ;;
	esac

	return 0
}

# Ask for a password, saving the input in $resp.
#    Display $1 as the prompt.
#    *Don't* allow the '!' options that ask does.
#    *Don't* echo input.
askpass() {
	set -o noglob
	stty -echo
	read resp?"$1 "
	stty echo
	set +o noglob
	echo
}

# Ask for user input.
#
#    $1    = the question to ask the user
#    $2    = the default answer
#
# Save the user input (or the default) in $resp.
#
# Allow the user to escape to shells ('!') or execute commands
# ('!foo') before entering the input.
ask() {
	local _question=$1 _default=$2

	set -o noglob
	while :; do
		echo -n "$_question "
		[[ -z $_default ]] || echo -n "[$_default] "
		read resp
		case $resp in
		!)	echo "Type 'exit' to return to install."
			sh
			;;
		!*)	eval ${resp#?}
			;;
		*)	: ${resp:=$_default}
			break
			;;
		esac
	done
	set +o noglob
}

# Ask for user input until a non-empty reply is entered.
#
#    $1    = the question to ask the user
#    $2    = the default answer
#
# Save the user input (or the default) in $resp.
ask_until() {
	resp=
	while [[ -z $resp ]] ; do
		ask "$1" "$2"
	done
}

# Ask the user for a y or n, and insist on 'y', 'yes', 'n' or 'no'.
#
#    $1    = the question to ask the user
#    $2    = the default answer (assumed to be 'n' if empty).
#
# Return 'y' or 'n' in $resp.
ask_yn() {
	local _q=$1 _a=${2:-no} _resp
	typeset -l _resp

	while :; do
		ask "$_q" "$_a"
		_resp=$resp
		case $_resp in
		y|yes)	resp=y ; return ;;
		n|no)	resp=n ; return ;;
		esac
	done
 }

# Ask for the user to select one value from a list, or 'done'.
#
# $1 = name of the list items (disk, cd, etc.)
# $2 = question to ask
# $3 = list of valid choices
# $4 = default choice, if it is not specified use the first item in $3
# $5 = error message if no items in $3, defaults to 'No $1s found.'
#
# At exit $resp holds selected item, or 'done'
ask_which() {
	local _name=$1 _query=$2 _list=$3 _def=$4 _err=$5

	set -- $_list
	if (( $# < 1 )); then
		echo "${_err:=No ${_name}s found}."
		resp=done
		return
	fi
	: ${_def:=$1}

	# Eliminate extraneous (especially trailing) whitespace in _list.
	_list="$*"

	while :; do
		# Put both lines in ask prompt, rather than use a
		# separate 'echo' to ensure the entire question is
		# re-ask'ed after a '!' or '!foo' shell escape.
		ask "Available ${_name}s are: $_list.\nWhich one $_query? (or 'done')" "$_def"

		# Quote $resp to prevent user from confusing isin() by
		# entering something like 'a a'.
		isin "$resp" $_list done && break
		echo "'$resp' is not a valid choice."
	done
}

# test the first argument against the remaining ones, return success on a match
isin() {
	local	_a=$1 _b

	shift
	for _b; do
		[[ $_a == $_b ]] && return 0
	done
	return 1
}

# add first argument to list formed by the remaining arguments
# adds to the tail if the element does not already exist
addel() {
	local	_a=$1

	shift

	echo -n "$*"
	isin "$_a" $* || echo -n " $_a"
}

# remove all occurrences of first argument from list formed by
# the remaining arguments
rmel() {
	local	_a=$1 _b

	shift
	for _b; do
		[[ $_a != $_b ]] && echo -n "$_b "
	done
}

bsort() {
	local _l _a=$1 _b

	[[ $# -gt 0 ]] || return

	shift
	for _b; do
		if [[ $_a != $_b ]] ; then
			if [[ $_a > $_b ]] ; then
				_l="$_a $_l"; _a=$_b
			else
				_l="$_b $_l"
			fi
		fi
	done

	# Output the smallest value found.
	echo -n "$_a "

	# Sort remaining values.
	bsort $_l
}

# Add interesting/useful comments from mnt/etc/$1 to /tmp/$1.
#
# $1 == file in /tmp and /mnt/etc directories
save_comments() {
	local _file=$1

	if [[ -f /mnt/etc/$_file ]]; then
		grep "^#" /mnt/etc/$_file >/tmp/$_file.new
		[[ -f /tmp/$_file ]] && cat /tmp/$_file >>/tmp/$_file.new
		mv /tmp/$_file.new /tmp/$_file
	fi
}

# Offer to edit a file in /tmp and execute ${EDITOR} to do so if the user
# accepts the offer.
#
# $1 == file in /tmp to edit
edit_tmp_file() {
	local _file=$1

	ask_yn "Edit $_file with $EDITOR?"
	[[ $resp == y ]] && $EDITOR /tmp/$_file
}

# Offer to shell out for manual network configuration, and do so if
# the user accepts the offer.
manual_net_cfg() {
	ask_yn "Do you want to do any manual network configuration?"

	[[ $resp == y ]] && { echo "Type 'exit' to return to $MODE." ; sh ; }
}

# log in via ftp to host $1 as user $2 with password $3
# and return a list of all files in the directory $4 on stdout
ftp_list_files() {
	ftp ${_ftp_active} -V -n "$1" <<__EOT
user "$2" "$3"
cd "$4"
ls
quit
__EOT
}

# Create a device.
#
# $1 = name of the device to create.
makedev() {
	local _dev=$1

	if [[ ! -r /dev/MAKEDEV ]] ; then
		echo "MAKEDEV not found. Can't create device nodes."
		return 1
	fi

	cd /dev ; sh MAKEDEV $_dev || return 1 ; cd - >/dev/null
}

# Create an entry in the hosts file. If an entry with the
# same symbolic name and address family already exists, delete it.
# $1 - IP address (v6 if it contains ':', else v4)
# $2 - symbolic name
addhostent() {
	local _addr=$1 _name=$2 _delim="."

	[[ $_addr == *:* ]] && _delim=":"

	sed "/^[0-9a-fA-F]*[$_delim].* $_name\$/d" /tmp/hosts >/tmp/hosts.new
	mv /tmp/hosts.new /tmp/hosts

	echo "$_addr $_name" >>/tmp/hosts
}

# Show list of available sets and let the user select which sets to install.
#
# $1 = available sets
# $2 = already selected sets
#
# Set $resp to list of selected sets.
select_sets() {
	local _avail=$1 _selected=$2 _next _f _action

	cat <<__EOT

Select sets by entering a set name, a file name pattern or 'all'. De-select
sets by prepending a '-' to the set name, file name pattern or 'all'. Selected
sets are labelled '[X]'.
__EOT
	while :; do
		_action=
		_next=
		echo
		for _f in $_avail; do
			if isin $_f $_selected; then
				echo "	[X] $_f"
			else
				echo "	[ ] $_f"
				: ${_next:=$_f}
			fi
		done
		: ${_next:=done}

		ask "Set name? (or 'done')" "$_next"
		case $resp in
		done)	break ;;
		-*)	_action=rmel ;;
		esac

		: ${_action:=addel}
		resp=${resp#+|-}

		case $resp in
		"")	continue ;;
		all)	resp=* ;;
		esac

		# Use @($resp) rather than just $resp to protect
		# against silly user input that might cause syntax
		# errors.
		for _f in $_avail; do
			eval "case $_f in
			@($resp)) _selected=\`$_action $_f \$_selected\` ;;
			esac"
		done
	done

	resp=$_selected
}

configure_ifs() {
	local _IFDEVS=$IFDEVS _ifs _name _media _hn

	while :; do
		ask_which "interface" "do you wish to initialize" "$_IFDEVS" \
			"" "No more interfaces to initialize"
		[[ $resp == done ]] && break

		_ifs=$resp
		_hn=/tmp/hostname.$_ifs

		# Get symbolic name - will be used in DHCP requests.
		ask "Symbolic (host) name for $_ifs?" "$(hostname -s)"
		_name=$resp

		# Get and apply media options.
		_media=$(ifconfig -m $_ifs | grep "media ")
		if [[ -n $_media ]]; then
			cat <<__EOT
The media options for $_ifs are currently
$(ifconfig -m $_ifs | sed -n '/supported/D;/media:/p')
__EOT
			ask_yn "Do you want to change the media options?"
			case $resp in
			y)	cat <<__EOT
Supported media options for $_ifs are:
$_media
__EOT
				ask "Media options for $_ifs?"
				_media=$resp
				ifconfig $_ifs $_media || return 1
				;;
			n)	_media=
				;;
			esac
		fi

		rm -f $_hn
		v4_config "$_ifs" "$_media" "$_name" "$_hn"
		v6_config "$_ifs" "$_media" "$_name" "$_hn"

		[[ -f $_hn ]] && _IFDEVS=$(rmel "$_ifs" $_IFDEVS)
	done
}

# Output '<UP | DOWN> [<addr> <netmask> <rest of inet line>]'.
#
# $1 == interface
v4_info() {
	ifconfig $1 inet | sed -n '
		1s/.*<UP,.*/UP/p
		1s/.*<.*/DOWN/p
		/inet/s/netmask//
		/inet/s///p'
}

# Obtain and output the inet6 information related to the given
# interface. Should output '<UP/DOWN> <addr> <prefixlen> <rest of inet line> '.
#
# $1 == interface
v6_info() {
	ifconfig $1 inet6 | sed -n '
		1s/.*<UP,.*/UP/p
		1s/.*<.*/DOWN/p
		/scopeid/d
		/inet6/s///p'
}

# Construct etc/dhclient.conf and issue DHCP request. Return FALSE if
# no IP address assigned to $1.
#
# $1 == interface
# $2 == hostname (optional).
dhcp_request() {
	local _ifs=$1 _hn=$2

	echo "lookup file bind" >/etc/resolv.conf.tail

	if [[ -n $_hn ]]; then
		_hn="send host-name \"$_hn\";"
		echo "Issuing hostname-associated DHCP request for $_ifs."
	else
		echo "Issuing free-roaming DHCP request for $_ifs."
	fi

	cat >/etc/dhclient.conf <<__EOT
initial-interval 1;
$_hn
request subnet-mask, broadcast-address, routers, domain-name,
	domain-name-servers, host-name;
__EOT

	ifconfig $_ifs group dhcp >/dev/null 2>&1
	dhclient $_ifs

	set -- $(v4_info $_ifs)

	if [[ $1 == UP && -n $2 ]]; then
		# Move configuration files to where they will be copied to the
		# installed system. Overwrites configuration information from
		# last successful dhcp attempt.
		mv /etc/dhclient.conf /tmp/dhclient.conf
		mv /etc/resolv.conf.tail /tmp/resolv.conf.tail
		return 0
	fi
	
	ifconfig $_ifs delete down
	rm /etc/dhclient.conf /etc/resolv.conf.tail
	return 1
}

v4_config() {
	local _ifs=$1 _media=$2 _name=$3 _hn=$4 _prompt _addr _mask

	if ifconfig $_ifs | grep 'groups:.* dhcp' >/dev/null 2>&1; then
		_addr=dhcp
	else
		set -- $(v4_info $_ifs)
		if [[ -n $2 ]]; then
			_addr=$2; _mask=$3
			ifconfig $_ifs inet $_addr delete
		fi
	fi

	[[ -x /sbin/dhclient ]] && _prompt=" or 'dhcp'"
	_prompt="IPv4 address for $_ifs? (or 'none'$_prompt)"

	ask_until "$_prompt" "$_addr"
	case $resp in
	none)	;;
	dhcp)	if [[ ! -x /sbin/dhclient ]]; then
			echo "DHCP not possible - no /sbin/dhclient."
		elif dhcp_request $_ifs "$_name" || dhcp_request $_ifs ; then
			addhostent "127.0.0.1" "$_name"
			echo "dhcp NONE NONE NONE $_media" >>$_hn
		fi
		;;
	*)	_addr=$resp
		ask_until "Netmask?" "${_mask:=255.255.255.0}"
		ifconfig $_ifs -group dhcp >/dev/null 2>&1
		if ifconfig $_ifs inet $_addr netmask $resp up ; then
			addhostent "$_addr" "$_name"
			echo "inet $_addr $resp NONE $_media" >$_hn
		fi
		;;
	esac
}

v6_config() {
	local _ifs=$1 _media=$2 _name=$3 _hn=$4 _addr _prefixlen _prompt

	ifconfig lo0 inet6 >/dev/null 2>&1 || return

	set -- $(v6_info $_ifs)
	[[ -n $2 ]] && { _addr=$2; _prefixlen=$3; }

	[[ -x /sbin/rtsol ]] && _prompt="or 'rtsol' "
	_prompt="IPv6 address for $_ifs? (${_prompt}or 'none')"
	ask_until "$_prompt" "${_addr:-none}"

	case $resp in
	none)	return
		;;
	rtsol)	[[ ! -x /sbin/rtsol ]] && { echo "No /sbin/rtsol." ; return ; }
		ifconfig $_ifs up
		rtsol -F $_ifs
		addhostent "::1" "$_name"
		echo "up\nrtsol $media" >>$_hn
		return
		;;
	esac

	_addr=$resp
	ask_until "IPv6 prefix length for $_ifs?" "${_prefixlen:=64}"
	ifconfig $_ifs inet6 $_addr prefixlen $resp up || return
	echo "inet6 $_addr $resp $media" >>$_hn
	addhostent "$_addr" "$_name"

	v6_defroute $_ifs
	[[ $resp == none ]] && return
	route -n add -inet6 -host default "$resp" || return
	echo "$resp" >>/tmp/mygate
}

v4_defroute() {
	local _dr _prompt=" or 'none'"

	[[ -x /sbin/dhclient ]] && _prompt=", 'dhcp'$_prompt"
	_prompt="Default IPv4 route? (IPv4 address$_prompt)"

	_dr=$(route -n show -inet | sed -ne '/^default */{s///; s/ .*//; p;}')
	[[ -f /tmp/dhclient.conf ]] && _dr=dhcp

	while :; do
		ask_until "$_prompt" "$_dr"
		[[ $resp == @(none|dhcp) ]] && break
		route delete -inet default >/dev/null 2>&1
		route -n add -inet -host default "$resp" && { echo "$resp" >/tmp/mygate ; break ; }
		# Put the old default route back. The new one did not work.
		route -n add -inet -host default $_dr >/dev/null 2>&1
	done
}

v6_defroute() {
	local _if=$1 _routers _oifs

	if [[ -z $(route -n show -inet6 | sed -ne '/^default */{s///; s/ .*//; p;}') ]]; then
		resp=none
		return
	fi

	if [[ -x /sbin/ping6 ]]; then
		_routers=$(ping6 -n -c 2 ff02::2%$_if 2>&1 | sed -n \
			-e '/bytes from/{s/^.*from //;s/,.*$//;p;}')
	fi

	_oifs=$IFS
	IFS=
	PS3="IPv6 default router? (list #, IPv6 address or 'none'): "
	select i in $_routers; do
		case $i in
		"")	resp=$REPLY
			[[ -n $resp ]] && break
			;;
		*)	resp=$i
			break
			;;
		esac
	done
	IFS=$_oifs
}

# Much of this is gratuitously stolen from /etc/netstart.
enable_network() {
	local _netfile _gw

	# Copy any required or optional files found
	for _netfile in hosts dhclient.conf resolv.conf resolv.conf.tail protocols services; do
		if [ -f /mnt/etc/${_netfile} ]; then
			cp /mnt/etc/${_netfile} /etc/${_netfile}
		fi
	done

	# Set the address for the loopback interface. Bringing the
	# interface up, automatically invokes the IPv6 address ::1.
	ifconfig lo0 inet 127.0.0.1

	# configure all of the non-loopback interfaces which we know about.
	# refer to hostname.if(5)
	for hn in /mnt/etc/hostname.*; do
		# Strip off /mnt/etc/hostname. prefix
		if=${hn#/mnt/etc/hostname.}

		# Check for ifconfig'able interface.
		ifconfig $if >/dev/null 2>&1 || continue

		# Now parse the hostname.* file
		while :; do
			if [ "$cmd2" ]; then
				# we are carrying over from the 'read dt dtaddr' last time
				set -- $cmd2
				af=$1 name=$2 mask=$3 bcaddr=$4 ext1=$5 cmd2=
				# make sure and get any remaining args in ext2, like the read below
				i=1; while [ i -lt 6 -a -n "$1" ]; do shift; let i=i+1; done
				ext2="$@"
			else
				# read the next line or exit the while loop
				read af name mask bcaddr ext1 ext2 || break
			fi
			# $af can be "dhcp", "up", "rtsol", an address family, commands, or
			# a comment.
			case $af in
			"#"*|"!"*|"bridge"|"")
				# skip comments, user commands, bridges,
				# and empty lines
				continue
				;;
			"dhcp")	[ "$name" = "NONE" ] && name=
				[ "$mask" = "NONE" ] && mask=
				[ "$bcaddr" = "NONE" ] && bcaddr=
				dhcpif="$dhcpif $if"
				cmd="ifconfig $if $name $mask $bcaddr $ext1 $ext2 down"
				cmd="$cmd; dhclient $if"
				;;
			"rtsol")
				rtsolif="$rtsolif $if"
				cmd="ifconfig $if $name $mask $bcaddr $ext1 $ext2 up"
				;;
			"up")
				# The only one of these guaranteed to be set is $if
				# the remaining ones exist so that media controls work
				cmd="ifconfig $if $name $mask $bcaddr $ext1 $ext2 up"
				;;
			*)	read dt dtaddr
				if [ "$name" = "alias" ]; then
					# perform a 'shift' of sorts
					alias=$name
					name=$mask
					mask=$bcaddr
					bcaddr=$ext1
					ext1=$ext2
					ext2=
				else
					alias=
				fi
				cmd="ifconfig $if $af $alias $name "
				case $dt in
				dest)	cmd="$cmd $dtaddr"
					;;
				[a-z!]*)
					cmd2="$dt $dtaddr"
					;;
				esac
				if [ ! -n "$name" ]; then
					echo "/mnt/etc/hostname.$if: invalid network configuration file"
					return
				fi
				case $af in
				inet)	[ "$mask" ] && cmd="$cmd netmask $mask"
					if [ "$bcaddr" -a "$bcaddr" != "NONE" ]; then
						cmd="$cmd broadcast $bcaddr"
					fi
					[ "$alias" ] && rtcmd="; route -qn add -host $name 127.0.0.1"
					;;
				inet6)
					[ "$mask" ] && cmd="$cmd prefixlen $mask"
					cmd="$cmd $bcaddr"
					;;
				*)	cmd="$cmd $mask $bcaddr"
				esac
				cmd="$cmd $ext1 $ext2$rtcmd" rtcmd=
				;;
			esac
			eval "$cmd"
		done </mnt/etc/hostname.$if
	done

	[[ -n $rtsolif ]] && /mnt/sbin/rtsol -F $rtsolif

	# /mnt/etc/mygate, if it exists, contains the address(es) of my
	# default gateway(s). Use for ipv4 if no interfaces configured via
	# dhcp. Use for ipv6 if no interfaces configured via rtsol.
	[[ -z $dhcpif ]] && stripcom /mnt/etc/mygate | while read _gw; do
		[[ $_gw == @(*:*) ]] && continue
		route -qn delete default >/dev/null 2>&1
		route -qn add -host default $_gw && break
	done
	[[ -z $rtsolif ]] && stripcom /mnt/etc/mygate | while read _gw; do
		[[ $_gw == !(*:*) ]] && continue
		route -qn delete -inet6 default >/dev/null 2>&1
		route -qn add -host -inet6 default $_gw && break
	done

	# Use loopback, not the wire.
	route -qn add -host `hostname` 127.0.0.1 >/dev/null
	route -qn add -net 127 127.0.0.1 -reject >/dev/null

	# Display results...
	echo "Network interface configuration:"
	ifconfig -am

	# enable the resolver if resolv.conf is available
	route -n show
	if [ -f /etc/resolv.conf ]; then
		echo "\nResolver enabled."
	else
		echo "\nResolver not enabled."
	fi
}

# Install a user-selected subset of the files in $2 from the source
# named in $1. Display an error message for failed installs so the
# user will know to try again.
install_files() {
	local _src=$1 _files=$2 _f _sets _get_sets

	# Initialize _sets to the list of sets found in _src, and initialize
	# _get_sets to the intersection of _sets and DEFAULTSETS.
	#
	# Sets will be installed in the order given in THESETS to ensure proper
	# installation.  So, to minimize user confusion display the sets in the
	# order in which they will be installed.
	for _f in $THESETS; do
		isin $_f $_files || continue;
		_sets=$(addel $_f $_sets)
		isin $_f $DEFAULTSETS && _get_sets=$(addel $_f $_get_sets)
	done

	if [[ -z $_sets ]]; then
		# Show $_src, but delete any ftp password.
		cat <<__EOT
No $OBSD sets were found at

	$(echo $_src | sed -e 's/\(^ftp:\/\/[^/]*\)\(:[^/]*\)\(@.*\)/\1\3/')

Set names are: $THESETS
__EOT
		return
	fi

	select_sets "$_sets" "$_get_sets"

	[[ -n $resp ]] || return
	_get_sets=$resp

	ask_yn "Ready to $MODE sets?" yes
	[[ $resp = n ]] && return

	for _f in $THESETS ; do
		isin $_f $_get_sets || continue
		echo "Getting $_f ..."
		case $_f in
		*.tgz)	ftp $_ftp_active -o - -V -m "$_src/$_f" | tar zxphf - -C /mnt
			;;
		*)	ftp $_ftp_active -o "/mnt/$_f" -V -m "$_src/$_f"
			;;
		esac
		if [ $? -ne 0 ]; then
			echo "'$_f' did not install correctly."
		else
			DEFAULTSETS=$(rmel $_f $DEFAULTSETS)
		fi
	done
}

# Encode $1 as specified for usercodes and passwords in RFC 1738
# section 3.1 and section 5.
#
# Escape everything between 0x20 and 0x7e to avoid both illegal url
# characters and characters causing problems during script processing.
#
# *NOTE*
#	1) quotes around $1 are required to preserve trailing or
#	   embeddded blanks in usercodes and passwords.
#	2) substitute '%' FIRST so it doesn't eliminate '%' chars we insert.
encode_for_url() {
	echo "$1" | sed -e "
s/%/%25/g
s/ /%20/g
s/!/%21/g
s/\"/%22/g
s/#/%23/g
s/\\\$/%24/g
s/&/%26/g
s/'/%27/g
s/(/%28/g
s/)/%29/g
s/\*/%2a/g
s/+/%2b/g
s/,/%2c/g
s/-/%2d/g
s/\./%2e/g
s/\//%2f/g
s/:/%3a/g
s/;/%3b/g
s/</%3c/g
s/=/%3d/g
s/>/%3e/g
s/?/%3f/g
s/@/%40/g
s/\[/%5b/g
s/\\\\/%5c/g
s/]/%5d/g
s/\^/%5e/g
s/_/%5f/g
s/\`/%60/g
s/{/%7b/g
s/|/%7c/g
s/}/%7d/g
s/~/%7e/g
"
}

# Check for the presence of an error message in the output of the ftp commands
# used to get the list of files in a directory.
#
# $1 = error message to look for
# $2 = ftp command output
ftp_error() {
	if [[ -n $(echo "$2" | grep "$1") ]]; then
		echo $1
		return 0
	fi
	return 1
}

# Get several parameters from the user, and xfer
# files from the server.
# $1 = url type (ftp or http)
# Note:	_ftp_server_ip, _ftp_server_dir, _ftp_server_login,
#	and _ftp_active must be global.
install_url() {
	local _url_type=$1 _file_list _url_base _oifs _prompt _passwd

	ask "HTTP/FTP proxy URL? (e.g. 'http://proxy:8080', or 'none')" \
	    "${ftp_proxy:-none}"
	unset ftp_proxy http_proxy
	[[ $resp == none ]] || export ftp_proxy=$resp http_proxy=$resp

	rm -f $SERVERLIST
	ask_yn "Display the list of known $_url_type servers?"
	if [[ $resp == y ]]; then
		# ftp.openbsd.org == 129.128.5.191 and will remain at
		# that address for the forseeable future.
		echo -n "Getting the list from 129.128.5.191 (ftp.openbsd.org)..."
		ftp $_ftp_active -V -a -o - \
			ftp://129.128.5.191/$FTPDIR/ftplist 2>/tmp/ftplisterr \
			| sed -ne "/^${_url_type}:\/\//s///p" >$SERVERLIST
		if [[ -s $SERVERLIST ]]; then
			echo "done."
			_prompt="Server? (IP address, hostname, list#, 'done' or '?')"
			cat -n $SERVERLIST | less -XE
		else
			echo "FAILED."
			cat /tmp/ftplisterr
		fi
	fi

	# Get server IP address or hostname
	: ${_prompt:="Server? (IP address, hostname or 'done')"}
	while :; do
		eval resp=\$_${_url_type}_server_ip
		ask_until "$_prompt" "$resp"
		case $resp in
		done)	return ;;
		"?")	[[ -s $SERVERLIST ]] || continue
			cat -n $SERVERLIST | less -XE
			;;
		+([0-9]))
			# A numeric hostname is ignored. A number is only used
			# as a line number in $SERVERLIST.
			[[ -s $SERVERLIST ]] || continue
			set -- $(sed -ne "${resp}p" $SERVERLIST)
			[[ $# -lt 1 ]] && { echo "There is no line $resp." ; continue ; }
			echo "Using	$*"
			eval _${_url_type}_server_ip=${1%%/*}
			eval _${_url_type}_server_dir=${1#*/}/$SETDIR
			# Repeat loop to get user to confirm server address.
			;;
		*)	eval _${_url_type}_server_ip=$resp
			break
			;;
		esac
	done

	# Some older servers lie about their support for passive mode ftp, so
	# ask the user if it worth trying passive mode to the chosen server.
	# Irrelevant if using a proxy.
	if [[ $_url_type == ftp && -z $ftp_proxy ]]; then
		case $_ftp_active in
		-A)	resp=no ;;
		*)	resp=yes ;;
		esac

		unset _ftp_active
		ask_yn "Does the server support passive mode ftp?" $resp
		[[ $resp == n ]] && _ftp_active=-A
	fi

	# Get server directory
	eval resp=\$_${_url_type}_server_dir
	ask_until "Server directory?" "${resp:-pub/OpenBSD/$SETDIR}"
	eval _${_url_type}_server_dir=$resp

	if [[ $_url_type == ftp ]]; then
		# Get login name, setting IFS to nothing so trailing or
		# embedded blanks are preserved!
		_oifs=$IFS
		IFS=
		ask_until "Login?" "${_ftp_server_login:=anonymous}"
		_ftp_server_login=$resp

		# Get password unless login in 'anonymous' or 'ftp'
		if [[ $_ftp_server_login == @(anonymous|ftp) ]]; then
			_passwd=root@`hostname`
		else
			resp=
			while [[ -z $resp ]] ; do
				askpass "Password? (will not echo)"
			done
			_passwd=$resp
		fi
		IFS=$_oifs
	fi

	# Build up the base url since it is so nasty...
	_url_base=$_url_type://
	if [[ $_url_type == ftp && $_ftp_server_login != anonymous ]]; then
		_url_base=$_url_base$(encode_for_url "$_ftp_server_login"):$(encode_for_url "$_passwd")@
	fi
	eval _url_base=$_url_base\$_${_url_type}_server_ip/\$_${_url_type}_server_dir

	# XXX Workaround for problems ftp'ing out from a v6 only host.
	ifconfig lo0 127.0.0.1

	# Get list of files from the server.
	if [[ $_url_type == ftp && -z $ftp_proxy ]] ; then
		_file_list=$(ftp_list_files "$_ftp_server_ip" "$_ftp_server_login" "$_passwd" "$_ftp_server_dir")
		ftp_error "Login failed." "$_file_list" && return
		ftp_error "No such file or directory." "$_file_list" && return
	else
		# Assumes index file is "index.txt" for http (or proxy)
		# We can't use index.html since the format is server-dependent
		_file_list=$(ftp -o - -V "$_url_base/index.txt" | sed 's/
//')
	fi

	install_files "$_url_base" "$_file_list"
}

install_mounted_fs() {
	local _dir

	while :; do
		ask_until "Pathname to the sets? (or 'done')" "$SETDIR"
		[[ $resp == done ]] && return
		# Accept a valid /mnt2 or /mnt relative path.
		[[ -d /mnt2/$resp ]] && { _dir=/mnt2/$resp ; break ; }
		[[ -d /mnt/$resp ]] && { _dir=/mnt/$resp ; break ; }
		# Accept a valid absolute path.
		[[ -d /$resp ]] && { _dir=/$resp ; break ; }
		echo "The directory '$resp' does not exist."
	done

	install_files "file://$_dir" "$(ls -l $_dir)"
}

install_cdrom() {
	local _drive _part=c _fstype

	get_drive "CD-ROM" "$CDDEVS" || return
	_drive=$resp

	set -- $(disklabel $_drive 2>&1 | grep '^  c: ')
	case $4 in
	ISO9660) _fstype=cd9660 ;;
	UDF)	 _fstype=udf ;;
	*)	 get_partition $_drive "cd9660" || return
		 set -- $resp
		 _part=$1
		 [[ -n $2 ]] && _fstype=$2
		;;
	esac

	mount -t $_fstype -o ro /dev/$_drive$_part /mnt2 || return
	install_mounted_fs
}

install_disk() {
	local _drive _dev _fstype _fsopts

	ask_yn "Is the disk partition already mounted?"
	if [[ $resp == n ]]; then
		get_drive "disk" "$DKDEVS" || return
		_drive=$resp

		get_partition $_drive "$MDFSTYPE" || return
		set -- $resp
		_dev=/dev/$_drive$1
		[[ -n $2 ]] && _fstype="-t $2"
		[[ $_fstype == $MDFSTYPE ]] && _fsopts=$MDFSOPTS

		if [[ -z $(mount | grep "^$_dev") ]]; then
			mount $_fstype -o ro,$_fsopts $_dev /mnt2 || return
		fi
	fi
	install_mounted_fs
}

install_nfs() {
	local _tcp

	# Get the IP address of the server.
	ask_until "Server IP address or hostname?" "$NFS_ADDR"
	NFS_ADDR=$resp

	# Get the server path to mount.
	ask_until "Filesystem on server to mount?" "$NFS_PATH"
	NFS_PATH=$resp

	# Determine use of TCP
	ask_yn "Use TCP transport? (requires TCP-capable NFS server)"
	[[ $resp == y ]] && _tcp=-T

	# Mount the server
	mount_nfs $_tcp -o ro $NFS_ADDR:$NFS_PATH /mnt2 || return

	install_mounted_fs
}

install_tape() {
	local _z _bs

	# Get the name of the tape device.
	get_drive "tape drive" "$MTDEVS" || return
	export TAPE=/dev/nr$resp
	if [[ ! -c $TAPE ]]; then
		echo "$TAPE is not a character special file."
		return
	fi

	# Rewind the tape device.
	echo -n "Rewinding $TAPE (mt rewind)..."
	mt rewind || return
	echo "done."

	# Extract the desired files.
	while :; do
		ask_until "Skip how many files? (or 'done')" 0
		[[ $resp == done ]] && return
		[[ $resp == +([0-9]) ]] || continue
		(($resp < 0)) && continue

		if (($resp > 0)); then
			echo -n "Skipping $resp file(s)..."
			mt fsf $resp || return
			echo "done."
		elif [[ -n $_bs ]]; then
			# Dance to start of next file.
			mt bsf ; mt fsf
		fi

		unset _z
		ask_yn "Is the file gzipped?" yes
		[[ $resp == y ]] && _z=z

		# Get the blocksize to use. If the file isn't gzipped then
		# default to the 20 x 512 = 10,240 byte tar default.
		[[ $_z == z ]] || _bs=10240
		ask_until "Blocksize for this file?" "${_bs:-8k}"
		[[ $resp == done ]] && return
		_bs=$resp

		dd if=$TAPE bs=$_bs | tar ${_z}xvphf - -C /mnt || return
	done
}

set_timezone() {
	local _zoneroot=/mnt/usr/share/zoneinfo/ _zonepath

	# If the timezone directory structure is not
	# available, return immediately.

	[[ ! -d $_zoneroot ]] && return

	if [[ -L /mnt/etc/localtime ]]; then
		TZ=$(ls -l /mnt/etc/localtime 2>/dev/null)
		TZ=${TZ#*${_zoneroot#/mnt}}
	fi

	: ${TZ:=GMT}

	while :; do
		_zonepath=$_zoneroot

		ask "What timezone are you in? ('?' for list)" "$TZ"

		if [[ $resp == ? ]]; then
			ls -F ${_zonepath}
			continue;
		fi

		_zonepath=${_zonepath}${resp}

		while [[ -d $_zonepath ]]; do
			ask "What sub-timezone of '${_zonepath#$_zoneroot}' are you in? ('?' for list)"
			case $resp in
			"")	;;
			?)	ls -F $_zonepath ;;
			*)	_zonepath=$_zonepath/$resp ;;
			esac
		done

		if [[ -f $_zonepath ]]; then
			TZ=${_zonepath#$_zoneroot}
			echo -n "Setting local timezone to '$TZ'..."
			ln -sf /usr/share/zoneinfo/$TZ /mnt/etc/localtime
			echo "done."
			return
		fi

		echo -n "'${_zonepath#$_zoneroot}'"
		echo " is not a valid timezone on this system."
	done
}

# Check with the user that missing required sets were deliberately skipped.
sane_install() {
	local _s _m

	for _s in $SANESETS; do
		isin $_s $DEFAULTSETS || continue
		ask_yn "'$_s' was not installed.\nAre you *SURE* your $MODE is complete without '$_s'?"
		[[ $resp == n ]] && _m="$_m $_s"
	done

	[[ -n $_m ]] && return 1
	return 0
}

# Ask the user for locations of sets, and then install whatever sets the
# user selects from that location. Repeat as many times as the user
# needs to get all desired sets.
install_sets() {
	local _d=disk _locs="disk ftp http"

	[[ -n $CDDEVS ]] && { _locs="cd $_locs" ; _d=cd ; }
	[[ -x /sbin/mount_nfs ]] && _locs="$_locs nfs"
	[[ -n $MTDEVS && -x /bin/mt ]] && _locs="$_locs tape"

	echo "\nLet's $MODE the sets!"
	while :; do
		umount -f /mnt2 >/dev/null 2>&1
		[[ -z $DEFAULTSETS ]] && _d=done

		ask "Location of sets? ($_locs or 'done')" "$_d"
		case $resp in
		done)	sane_install && return ;;
		c*|C*)	isin "cd" $_locs && install_cdrom ;;
		d*|D*)	install_disk ;;
		f*|F*)	isin "ftp" $_locs && install_url ftp ;;
		h*|H*)	isin "http" $_locs && install_url http ;;
		n*|N*)	isin "nfs" $_locs && install_nfs ;;
		t*|T*)	isin "tape" $_locs && install_tape ;;
		esac
	done
}

# Create a skeletal but useful /etc/fstab from /tmp/fstab by stripping all
# comment lines and dropping all filesystems which
#
#       1) can't be mounted (no mount_* command is found),
#	2) have 'xx' in the option field (usually /altroot),
#	3) have 'noauto' in the option field,
#	4) are nfs (since name resolution may not be present).
#
# In addition,
#
#	1) delete 'softdep' options (no soft updates in ramdisk kernels),
#	2) mount non-ffs filesystems read only,
#	3) prepend '/mnt' to all mount points,
#	4) delete any trailing '/' from the mount point (e.g. root),
#	5) leave out fs_freq and fs_passno fields.
#
# If no /etc/fstab is created, do not proceed with install/upgrade.
munge_fstab() {
	local _dev _mp _fstype _opt _rest

	while read _dev _mp _fstype _opt _rest; do
		# Drop irrelevant lines and filesystems.
		[[ $_dev == \#* || \
		    $_fstype == nfs || \
		    ! -f /sbin/mount_$_fstype || \
		    $_opt == *noauto* || \
		    $_opt == *xx* ]] && continue

		# Remove any softdep options, as soft updates are not
		# available in the ramdisk kernels.
		_opt=$(echo $_opt | sed -e 's/softdep//')

		# Mount non-ffs filesystems read only.
		[[ $_fstype == ffs ]] || _opt=$(echo $_opt | sed -e 's/rw/ro/')

		# Write fs entry in fstab.
		# 1) prepend '/mnt' to the mount point.
		# 2) remove a trailing '/' from the mount point (e.g. root).
		# 3) leave out fs_freq and fs_passno fields (i.e. $_rest).
		echo $_dev /mnt${_mp%/} $_fstype $_opt

	done </tmp/fstab >/etc/fstab

	# If no /etc/fstab was created, we have nowhere to $MODE to.
	if [ ! -s /etc/fstab ]; then
		echo "Unable to create valid /etc/fstab."
		exit
	fi
}

# Must mount filesystems manually, one at a time, so we can make
# sure the mount points exist.
mount_fs() {
	local _async=$1 _dev _mp _fstype _opt _rest

	while read _dev _mp _fstype _opt _rest; do
		# If not the root filesystem, make sure the mount
		# point is present.
		[ "$_mp" = "/mnt" ] || mkdir -p $_mp

		# Mount the filesystem. If the mount fails, exit.
		if ! mount -v -t $_fstype $_async -o $_opt $_dev $_mp ; then
			# In addition to the error message displayed by mount ...
			cat <<__EOT

FATAL ERROR:	Cannot mount filesystems. Double-check your configuration
		and restart the $MODE.

__EOT
			exit
		fi
	done </etc/fstab
}

# Preen all filesystems in /etc/fstab that have a /sbin/fsck_XXX,
# showing individual results, but skipping $ROOTDEV. This was already
# fsck'ed successfully.
#
# Exit if any fsck's fail (but do them all before exiting!).
check_fs() {
	local _dev _mp _fstype _rest _fail

	echo "Checking non-root filesystems..."

	while read _dev _mp _fstype _rest; do
		[ "$_dev" != /dev/"$ROOTDEV" ] || continue
		[ -f "/sbin/fsck_$_fstype" ] || continue
		# Make sure device exists before fsck'ing it.
		_rest=${_dev#/dev/}
		makedev ${_rest%[a-p]} || continue
		echo -n "fsck -p ${_dev}..."
		if ! fsck -fp ${_dev} >/dev/null 2>&1; then
			echo "FAILED. You must fsck $_dev manually."
			_fail=y
		else
			echo "OK."
		fi
	done </etc/fstab

	echo "...done."

	[ "$_fail" ] && exit
}

# Extract fully qualified domain name from current hostname. If none is
# currently set, use 'my.domain'.
get_fqdn() {
	local _dn

	_dn=$(hostname)
	_dn=${_dn#$(hostname -s)}
	_dn=${_dn#.}

	echo "${_dn:=my.domain}"
}

donetconfig() {
	local _dn _ns _n

	configure_ifs

	# As dhclient will populate /etc/resolv.conf, a symbolic link to
	# /tmp/resolv.conf.shadow, mv any such file to /tmp/resolv.conf
	# so it will eventually be copied to /mnt/etc/resolv.conf and will
	# not in the meantime remove the user's ability to choose to use it
	# or not, during the rest of the install.
	if [ -f /tmp/resolv.conf.shadow ]; then
		mv /tmp/resolv.conf.shadow /tmp/resolv.conf
		# Get nameserver address(es). Store as a blank separated list.
		for _n in $(grep '^nameserver ' /tmp/resolv.conf); do
			[[ $_n == nameserver ]] || _ns="$_ns$_n "
		done
		# Zap trailing space in _ns.
		set -- $_ns
		_ns=$*
		# Get default fully qualified domain name from *first* domain
		# given on *last* search or domain statement.
		_dn=$(sed -n \
			-e '/^domain[[:space:]][[:space:]]*/{s///;s/\([^[:space:]]*\).*$/\1/;h;}' \
			-e '/^search[[:space:]][[:space:]]*/{s///;s/\([^[:space:]]*\).*$/\1/;h;}' \
			-e '${g;p;}' /tmp/resolv.conf)
	fi

	# Get & apply fully qualified domain name to hostname.
	ask "DNS domain name? (e.g. 'bar.com')" "${_dn:=$(get_fqdn)}"
	hostname "$(hostname -s).$resp"

	# Get/Confirm nameservers, and construct appropriate resolv.conf.
	ask "DNS nameserver? (IP address or 'none')" "${_ns:=none}"
	if [[ $resp != none ]]; then
		echo "lookup file bind" >/tmp/resolv.conf
		for _ns in $resp; do
			echo "nameserver $_ns" >>/tmp/resolv.conf
		done
		ask_yn "Use the nameserver now?" yes
		[[ $resp == y ]] && cp /tmp/resolv.conf /tmp/resolv.conf.shadow
	fi

	# Get/Confirm an IPv4 default route if an IPv4 address was configured.
	[[ -n $(ifconfig -a | sed -ne '/[ 	]inet .* broadcast /p') ]] && v4_defroute

	edit_tmp_file hosts
	manual_net_cfg
}

populateusrlocal() {
	if [ -f /mnt/etc/mtree/BSD.local.dist ]; then
		/mnt/usr/sbin/chroot /mnt /usr/sbin/mtree -Uedqn -p /usr/local -f /etc/mtree/BSD.local.dist >/dev/null
	fi
}

questions() {
	local _bd _td

	ask_yn "Start sshd(8) by default?" yes
	if [[ $resp == n ]]; then
		echo "sshd_flags=NO		# disabled during install" \
		    >>/mnt/etc/rc.conf.local
	fi

	ask_yn "Start ntpd(8) by default?"
	if [[ $resp == y ]]; then
		echo "ntpd_flags=		# enabled during install" \
		    >>/mnt/etc/rc.conf.local
	fi

	if [[ -n $MDXAPERTURE ]]; then
		ask_yn "Do you expect to run the X Window System?"
		if [[ $resp == y ]]; then
			sed -e "/^#\(machdep\.allowaperture=${MDXAPERTURE}\)/s//\1	/" \
			    /mnt/etc/sysctl.conf >/tmp/sysctl.conf
			cp /tmp/sysctl.conf /mnt/etc/sysctl.conf
		fi
	fi

	[[ -z $SERIALDEV ]] && return
	set -- $SERIALDEV
	_bd=$1
	_td=$2
	ask_yn "Change the default console to $_bd?"
	[[ $resp == n ]] && return
	ask_which "speed" "should $_bd use" "9600 19200 38400 57600 115200"
	[[ $resp == done ]] && return
	echo "stty $_bd $resp\nset tty $_bd" >>/mnt/etc/boot.conf
	sed	-e "/^${_td}/s/std.9600/std.${resp}/" \
		-e "/^${_td}/s/unknown/vt220	/" \
		-e "/${_td}/s/off/on secure/" /mnt/etc/ttys >/tmp/ttys
}

finish_up() {
	local _dev _mp _fstype _rest

	# Mount all known swap partitions.  This gives systems with little
	# memory a better chance at running 'MAKEDEV all'.
	if [[ -x /mnt/sbin/swapctl ]]; then
		/mnt/sbin/swapctl -a /dev/$SWAPDEV >/dev/null 2>&1
		# Can't do chmod && swapctl -A because devices are not yet
		# created on install'ed systems. On upgrade'ed system there
		# is a small chance the device does not exist on the ramdisk
		# and will thus not get mounted.
		while read _dev _mp _fstype _rest; do
			[[ $_fstype == swap ]] && \
			    /mnt/sbin/swapctl -a $_dev >/dev/null 2>&1
		done </mnt/etc/fstab
	fi

	if grep -qs '^rtsol' /mnt/etc/hostname.*; then
		sed -e "/^#\(net\.inet6\.ip6\.accept_rtadv\)/s//\1/" \
		    /mnt/etc/sysctl.conf >/tmp/sysctl.conf
		cp /tmp/sysctl.conf /mnt/etc/sysctl.conf
	fi

	echo -n "Making all device nodes..."
	cd /mnt/dev
	sh MAKEDEV all
	# Make sure any devices we found during probe are created in the
	# installed system.
	for _dev in $DKDEVS $CDDEVS $MTDEVS; do
		sh MAKEDEV $_dev
	done
	echo "done."
	cd /

	md_installboot $ROOTDISK

	populateusrlocal

	[ -x /mnt/$MODE.site ] && /mnt/usr/sbin/chroot /mnt /$MODE.site

	# Pat on the back.
	cat <<__EOT

CONGRATULATIONS! Your OpenBSD $MODE has been successfully completed!
To boot the new system, enter halt at the command prompt. Once the
system has halted, reset the machine and boot from the disk.
__EOT

	md_congrats
}

# #######################################################################
#
# Initial actions common to both installs and upgrades.
#
# Some may require machine dependent routines, which may
# call functions defined above, so it's safest to put this
# code here rather than at the top of the file.
#
# #######################################################################

ROOTDISK=
ROOTDEV=

VERSION=40

VNAME="$(( $VERSION / 10 )).$(( $VERSION % 10 ))"
SETDIR="$VNAME/$ARCH"
FTPDIR="pub/OpenBSD/$VNAME"
OBSD="OpenBSD/$ARCH $VNAME"
SERVERLIST=/tmp/serverlist

# Do not limit ourselves during installs or upgrades.
for _opt in d f l m n p s; do
	ulimit -$_opt unlimited
done

# Extract and save one boot's worth of dmesg
dmesg | sed -ne '/^OpenBSD /h;/^OpenBSD /!H;${g;p;}' >/var/run/dmesg.boot

# Scan /var/run/dmesg.boot for interesting devices.
DKDEVS=$(scan_dmesg "${MDDKDEVS:-/^[sw]d[0-9][0-9]* /s/ .*//p}")
CDDEVS=$(scan_dmesg "${MDCDDEVS:-/^cd[0-9][0-9]* /s/ .*//p}")
MTDEVS=$(scan_dmesg "${MDMTDEVS:-/^[cmsw]t[0-9][0-9]* /s/ .*//p}")
IFDEVS=$(get_ifdevs)
SERIALDEV=$(get_serialdev)

# Selected sets will be installed in the order they are listed in $THESETS.
# Ensure that siteXX.tgz is the *last* set listed so its contents overwrite
# the contents of the other sets, not the other way around.
THESETS="bsd bsd.rd bsd.mp $MDSETS"
DEFAULTSETS="bsd bsd.rd"
for _set in base etc misc comp man game xbase xetc xshare xfont xserv site ; do
	[[ $MODE == upgrade && ( $_set == etc || $_set == xetc ) ]] && continue
	THESETS="$THESETS ${_set}${VERSION}.tgz"
	isin $_set xbase xetc xshare xfont xserv site && continue
	DEFAULTSETS="$DEFAULTSETS ${_set}${VERSION}.tgz"
done
# Since etc${VERSION}.tgz is not in DEFAULTSETS for upgrades, it can always be
# in SANESETS.
SANESETS="bsd base${VERSION}.tgz etc${VERSION}.tgz"

# decide upon an editor
: ${EDITOR:=ed}
[[ -x /usr/bin/vi ]] && EDITOR=vi
export EDITOR

# umount all filesystems, just in case we are re-running install or upgrade.
[[ -f /etc/fstab ]] && umount -av 1>/dev/null 2>&1
umount -v /mnt 1>/dev/null 2>&1

# Introduce ourselves.
welcome

# Get ROOTDISK, ROOTDEV and SWAPDEV.
if [[ $MODE == install && ! -f /etc/fstab ]]; then
	cat <<__EOT

You will now initialize the disk(s) that OpenBSD will use. To enable all
available security features you should configure the disk(s) to allow the
creation of separate filesystems for /, /tmp, /var, /usr, and /home.

__EOT
fi

set -- $DKDEVS
[[ $# -gt 1 ]] && _defdsk=done

ask_which "disk" "is the root disk" "$DKDEVS" "$_defdsk"
[[ $resp == done ]] && exit
makedev $resp || exit

ROOTDISK=$resp
ROOTDEV=${ROOTDISK}a
SWAPDEV=${ROOTDISK}b