path: root/distrib/miniroot/install.sub

#	$OpenBSD: install.sub,v 1.370 2005/04/02 14:27:08 krw Exp $
#	$NetBSD: install.sub,v 1.5.2.8 1996/09/02 23:25:02 pk Exp $
#
# Copyright (c) 1997-2005 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
#	MDDISKDEVS  - '/^[sw]d[0-9][0-9]* /s/ .*//p' assumed if not provided
#	MDCDDEVS    - '/^cd[0-9][0-9]* /s/ .*//p'    assumed if not provided
#	MDXAPERTURE - if not empty, set machdep.allowaperture=value in sysctl.conf
. install.md

set_term() {
	local _tables

	[[ -n $TERM ]] && return
	ask "Terminal type?" ${MDTERM:-vt220}
	TERM=$resp
	export TERM

	[[ -x /sbin/kbd ]] || return
	_tables=$(bsort $(kbd -l | egrep -v "^(user|tables|encoding)"))
	ask_which "kbd(8) table" "best matches your keyboard" "$_tables" us
	[[ $resp != @(done|us) ]] && kbd $resp && echo $resp >/tmp/kbdtype
}

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..."
}

get_dkdevs() {
	bsort `sed -ne "${MDDISKDEVS:-/^[sw]d[0-9][0-9]* /s/ .*//p}" /var/run/dmesg.boot`
}

get_cddevs() {
	bsort `sed -ne "${MDCDDEVS:-/^cd[0-9][0-9]* /s/ .*//p}" /var/run/dmesg.boot`
}

get_tapedevs () {
	bsort $(egrep "^(ct|mt|st|ts|wt)[[:digit:]]+ " /var/run/dmesg.boot \
		| sed -e "s/ .*//p" )
}

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.
# NOTE: Only single digit serial devices (<dev>0 -> <dev>9) are looked for.
get_serialdev() {
	local _devs _d _bd _td

	[[ -n $MDSERIAL ]] || exit
	set -- $MDSERIAL
	_d=$1
	_bd=$2
	_td=$3
	_devs=$(sed -ne "/^${_d}\([0-9]\) .*/s//\1/p" /var/run/dmesg.boot)
	_devs=$(bsort $_devs)
	set -- $_devs
	echo "${_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 "$_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

	DEVSMADE=$(addel $_dev $DEVSMADE)
}

# 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
	
	sed "/^[0-9a-fA-F]*[:.].* $_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

	while :; do
		_action=
		cat <<__EOT

The following sets are available. Enter a filename, 'all' to select
all the sets, or 'done'. You may de-select a set by prepending a '-'
to its name.

__EOT
		_next=
		for _f in $_avail; do
			if isin $_f $_selected; then
				echo "	[X] $_f"
			else
				echo "	[ ] $_f"
				: ${_next:=$_f}
			fi
		done
		: ${_next:=done}

		ask "\nFile 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
		/inet6/s/prefixlen//
		/inet6/s///p'
}

# Construct etc/dhclient.conf and issue DHCP request. Return FALSE if
# no IP address or 0.0.0.0 assigned to $1.
#
# $1 == interface
# $2 == hostname (optional).
dhcp_request() {
	local _ifs=$1 _hostname=$2

	echo "initial-interval 1;" >/etc/dhclient.conf

	if [[ -n $_hostname ]]; then
		echo "send host-name \"$_hostname\";" >>/etc/dhclient.conf
		echo "Issuing hostname-associated DHCP request for $_ifs."
	else
		echo "Issuing free-roaming DHCP request for $_ifs."
	fi

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

	cat >>/etc/resolv.conf.tail <<__EOT
lookup file bind
__EOT

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

	set -- $(v4_info $_ifs)

	if [[ $1 == UP && $2 == "0.0.0.0" ]]; then
		ifconfig $_ifs delete down
		rm /etc/dhclient.conf /etc/resolv.conf.tail
		return 1
	fi

	# 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
}

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"

	case $resp in
	none)	return	
		;;
	rtsol) 	if [[ ! -x /sbin/rtsol ]]; then
			echo "rtsol not possible - no /sbin/rtsol."
			return
 		fi
		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 "!route -n add -host -inet6 default $resp" >>$_hn
}

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

	# 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=
				ifconfig $if $name $mask $bcaddr $ext1 $ext2 down
				cmd="dhclient $if"
				;;
			"rtsol")
				ifconfig $if $name $mask $bcaddr $ext1 $ext2 up
				rtsif="$rtsif $if"
				cmd=
				;;
			"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 $rtsif ]] && /mnt/sbin/rtsol -F $rtsif

	# /mnt/etc/mygate, if it exists, contains the name of my gateway host
	# that name must be in /etc/hosts.
	if [ -f /mnt/etc/mygate ]; then
		route delete default >/dev/null 2>&1
		route -qn add -host default $(</mnt/etc/mygate)
	fi

	# 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 $_url_type servers?" "${_get_server_list:-yes}"
	_get_server_list=$resp
	if [[ $_get_server_list == 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 anonymous
		_passwd=root@`hostname`
		if [[ $_ftp_server_login != anonymous ]]; then
			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"
}

# $1 - mount point directory is relative to
# $2 - default directory
install_mounted_fs() {
	local _mp=$1 _dir=$2

	while :; do
		ask_until "Pathname to the sets? (or 'done')" "$_dir"
		[[ $resp == done ]] && return
		# Accept a valid $_mp relative path.
		[[ -d $_mp/$resp ]] && { _dir=$_mp/$resp ; break ; }
		# Accept a valid absolute path.
		[[ -d /$resp ]] && { _dir=/$resp ; break ; }
		# Otherwise ask again, with original default dir.
		echo "The directory '$resp' does not exist."
	done

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

install_cdrom() {
	local _drive _part=c _fstype="-t cd9660"

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

	# Only ask detail questions for non-ISO9660 CD-ROMs.
	if [[ -z $(disklabel $_drive 2>&1 | grep '^ *c: .*ISO9660') ]]; then
		unset _fstype
		get_partition $_drive "cd9660" || return
		set -- $resp
		_part=$1
		[[ -n $2 ]] && _fstype="-t $2"
	fi

	mount $_fstype -o ro /dev/$_drive$_part /mnt2 || return
	install_mounted_fs /mnt2 "$SETDIR"
	umount -f /mnt2 >/dev/null 2>&1
}

install_disk() {
	local _drive _part _fstype _fsopts

	get_drive "disk" "$DKDEVS" || return
	_drive=$resp

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

	mount $_fstype -o ro,$_fsopts /dev/$_drive$_part /mnt2 || return
	install_mounted_fs /mnt2
	umount -f /mnt2 >/dev/null 2>&1
}

install_nfs() {
	# Can we actually mount NFS filesystems?
	if [ ! -f /sbin/mount_nfs ]; then
		echo "/sbin/mount_nfs not found. Cannot mount NFS filesystems."
		return
	fi

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

	# Get server path to mount
	ask_until "Filesystem on server to mount?" "$_nfs_server_path"
	_nfs_server_path=$resp

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

	# Mount the server
	if ! mount_nfs $_nfs_tcp -o ro ${_nfs_server_ip}:${_nfs_server_path} /mnt2 ; then
		echo "Cannot mount NFS server."
		return
	fi

	install_mounted_fs /mnt2
	umount -f /mnt2 >/dev/null 2>&1
}

install_tape() {
	local _z _bs

	# Can't use tape without /bin/mt.
	if [[ ! -x /bin/mt ]]; then
		echo "/bin/mt not found. Can't $MODE from tape."
		return
	fi

	# Get the name of the tape device.
	get_drive "tape drive" "$TAPEDEVS" || return
	export TAPE=/dev/nr$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

	cat <<__EOT

You will now specify the location and names of the $MODE sets you want to
load. You will be able to repeat this step until all of your sets have been
successfully loaded. If you are not sure what sets to $MODE, refer to the
installation notes for details on the contents of each.
__EOT

	while :; do
		_d=
		cat <<__EOT

Sets can be located on a (m)ounted filesystem; a (c)drom, (d)isk or (t)ape
device; or a (f)tp, (n)fs or (h)ttp server.
__EOT
		[[ -z $DEFAULTSETS ]] && _d=done
		ask "Where are the $MODE sets? (or 'done')" "$_d"

		case $resp in
		done)	sane_install && return ;;
		c*|C*)	install_cdrom ;;
		d*|D*)	install_disk ;;
		f*|F*)	install_url ftp ;;
		h*|H*)	install_url http ;;
		m*|M*)	install_mounted_fs /mnt ;;
		n*|N*)	install_nfs ;;
		t*|T*)	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?" no
	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?" yes
		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' /tmp/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 added as a result of makedev() calls
	# are recreated in installed system.
	for _dev in $DEVSMADE; 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=37

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=$(get_dkdevs)
CDDEVS=$(get_cddevs)
IFDEVS=$(get_ifdevs)
TAPEDEVS=$(get_tapedevs)
SERIALDEV=$(get_serialdev)

# Devices created with makedev().
DEVSMADE=

# 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