#!/bin/sh
#	$OpenBSD: install.sub,v 1.66 1998/03/29 19:54:50 millert Exp $
#	$NetBSD: install.sub,v 1.5.2.8 1996/09/02 23:25:02 pk Exp $
#
# Copyright (c) 1997,1998 Todd Miller, Theo de Raadt
# 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.
# 3. All advertising materials mentioning features or use of this software
#    must display the following acknowledgement:
#	This product includes software developed by Todd Miller and
#	Theo de Raadt
# 4. The name of the author may not be used to endorse or promote products
#    derived from this software without specific prior written permission.
#
# 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 installation/upgrade script - common subroutines.

ROOTDISK=""				# filled in below
VERSION=
VERSION_MAJOR=$(( $VERSION / 10 ))
VERSION_MINOR=$(( $VERSION % 10 ))
export VERSION VERSION_MAJOR VERSION_MINOR

ALLSETS="base etc misc comp text man game"	# default install sets
UPGRSETS="base misc comp text man game"		# default upgrade sets
SNAPSETS="bin dev etc games man misc sbin text \
	  usr.bin usr.binutils usr.games usr.include \
	  usr.lib usr.libexec usr.misc usr.sbin usr.share var"
THESETS=					# one of the above

local_sets_dir=""			# Path searched for sets by install_sets
					# on the local filesystems

# decide upon an editor
if [ X$EDITOR = X ]; then
	if [ -x /usr/bin/vi ]; then
		EDITOR=vi
	else
		EDITOR=ed
	fi
	export EDITOR
fi

# Please don't use the 1 of n form below, good idea, wrong implementation!
# get a reponse with default[s]
getresp() {
	set -o noglob
	valid="false"
	while [ "X$valid" = "Xfalse" ]; do
		read resp
		if [ "X$resp" = "X" ]; then
			resp=$1
		fi
		if [ $# -gt 1 ]; then
			for i in $@; do
				if [ "X$resp" = "X$i" ]; then
					valid="true"
				fi
			done
		else
			valid="true"
		fi
		if [ "X$valid" = "Xfalse" ]; then
			echo "Try again: Enter one of [$@]"
		fi
	done	
	set +o noglob
}

isin() {
# test the first argument against the remaining ones, return succes on a match
	local	_a

	_a=$1; shift
	while [ $# != 0 ]; do
		if [ "$_a" = "$1" ]; then return 0; fi
		shift
	done
	return 1
}

rmel() {
# remove first argument from list formed by the remaining arguments
	local	_a

	_a=$1; shift
	while [ $# != 0 ]; do
		if [ "$_a" != "$1" ]; then
			echo "$1";
		fi
		shift
	done
}

cutword () {
# read a line of data, return Nth element.
	local _a
	local _n
	local _oifs

	# optional field separator
	_oifs="$IFS"
	case "$1" in
		-t?*) IFS=${1#-t}; shift;;
	esac

	_n=$1
	read _a; set -- $_a
	IFS="$_oifs"
	if [ "$1" = "" ]; then return; fi
	eval echo \$$_n
}

cutlast () {
# read a line of data, return last element. Equiv. of awk '{print $NF}'.
	local _a
	local _oifs

	# optional field separator
	_oifs="$IFS"
	case "$1" in
		-t?*) IFS=${1#-t}; shift;;
	esac

	read _a; set -- $_a
	IFS="$_oifs"
	if [ "$1" = "" ]; then return; fi
	while [ "$#" -gt 10 ]; do shift 10; done
	eval echo \$$#
}

firstchar () {
# return first character of argument
	local _a
	_a=$1
	while [ ${#_a} != 1 ]; do
		_a=${_a%?}
	done
	echo $_a
}

basename () {
	local _oifs
	if [ "$1" = "" ]; then return; fi
	_oifs="$IFS"
	IFS="/"
	set -- $1
	IFS="$_oifs"
	while [ "$#" -gt 10 ]; do shift 10; done
	eval echo \$$#
}

dir_has_sets() {
	# return true when the directory $1 contains a set for $2...$n
	local _dir
	local _file

	_dir=$1; shift
	for _file in $*
	do
		if [ -f $_dir/${_file}${VERSION}.tar.gz ]; then
			return 0
		fi
		# Try for stupid msdos convention
		if [ -f $_dir/${_file}${VERSION}.tgz ]; then
			return 0
		fi
		# Special check for kernel
		if [ $_file = "kernel" -a -f $_dir/bsd ]; then
			return 0
		fi
	done
	return 1
}

list_has_sets() {
	# return true when the list $1 contains a set, given dir $2 for $3...$n
	local _list
	local _file

	_list=$1; shift
	for _file in $*
	do
		if isin ${_file}${VERSION}.tar.gz $_list; then
			return 0
		fi
		# Try for stupid msdos convention
		if isin ${_file}${VERSION}.tgz $_list; then
			return 0
		fi
		# Special check for kernel
		if test $_file = "kernel" && isin bsd $_list; then
			return 0
		fi
	done
	return 1
}

ftp_list_files() {
	# 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
	local _host
	local _user
	local _pass
	local _dir

	_host=$1; shift
	_user=$1; shift
	_pass=$1; shift
	_dir=$1; shift

	ftp ${_ftp_active} -V -n $_host  <<__ptf
user $_user $_pass
cd $_dir
ls
quit
__ptf
}

twiddle() {
# spin the propeller so we don't get bored
	while : ; do  
		sleep 1; echo -n "/";
		sleep 1; echo -n "-";
		sleep 1; echo -n "\\";
		sleep 1; echo -n "|";
	done > /dev/tty & echo $!
}

get_localdir() {
	# $1 is relative mountpoint
	local _mp
	local _dir

	_mp=$1
	_dir=
	while : ; do
	    echo -n "Enter the pathname where the sets are stored [$_dir] "
	    getresp "$_dir"
	    _dir=$resp

	    # Allow break-out with empty response
	    if [ -z "$_dir" ]; then
		echo -n "Are you sure you don't want to set the pathname? [n] "
		getresp "n"
		case "$resp" in
			y*|Y*)
				break
				;;
			*)
				continue
				;;
		esac
	    fi

	    if dir_has_sets "$_mp/$_dir" $THESETS
	    then
		local_sets_dir="$_mp/$_dir"
		break
	    else
		cat << __get_reldir_1
The directory \"$local_sets_dir\" does not exist, or does not hold any of the
upgrade sets.
__get_reldir_1
		echo -n "Re-enter pathname? [y] "
		getresp "y"
		case "$resp" in
			y*|Y*)
				;;
			*)
				local_sets_dir=""
				break
				;;
		esac
	    fi
	done
}

getanotherdisk() {
	cat << \__getanotherdisk_1

Now you can select another disk to initialize.  (Do not re-select a disk
you have already entered information for).  Available disks are:

__getanotherdisk_1
	_DKDEVS=`md_get_diskdevs`
	echo	"$_DKDEVS"
	echo	""
	echo -n	"Which one? [done] "
	getresp ""
	if [ "X${resp}" = "X" ]; then
		DISK=done
	elif isin $resp $_DKDEVS ; then
		DISK="$resp"
	else
		echo ""
		echo "The disk $resp does not exist."
		DISK=""
	fi
}

getrootdisk() {
	cat << \__getrootdisk_1

The installation program needs to know which disk to consider the root disk.
Note the unit number may be different than the unit number you used in the
boot program (especially on a PC with multiple disk controllers).
Available disks are:

__getrootdisk_1
	local _defdsk;

	_DKDEVS=`md_get_diskdevs`
	_defdsk=`echo $_DKDEVS | cutlast`
	if [ "${_defdsk}" != "${_DKDEVS}" ]; then
		_defdsk=""
	fi
	echo	"$_DKDEVS"
	echo	""
	echo -n "Which disk is the root disk [${_defdsk}]? "
	getresp "${_defdsk}"
	if isin $resp $_DKDEVS ; then
		ROOTDISK="$resp"
	else
		echo ""
		echo "The disk $resp does not exist."
		ROOTDISK=""
	fi
}

labelmoredisks() {
	cat << \__labelmoredisks_1

You may label the following disks:

__labelmoredisks_1
	echo "$_DKDEVS"
	echo	""
	echo -n	"Label which disk? [done] "
	getresp "done"
	case "$resp" in
		done)
			;;

		*)
			if isin $resp $_DKDEVS ; then
				md_labeldisk $resp
			else
				echo ""
				echo "The disk $resp does not exist."
			fi
			;;
	esac
}

addhostent() {
	# $1 - IP address
	# $2 - symbolic name

	# Create an entry in the hosts table.  If no host table
	# exists, create one.  If the IP address already exists,
	# replace it's entry.
	if [ ! -f /tmp/hosts ]; then
		echo "127.0.0.1 localhost" > /tmp/hosts
	fi

	sed "/^$1 /d" < /tmp/hosts > /tmp/hosts.new
	mv /tmp/hosts.new /tmp/hosts

	echo "$1 $2 $2.$FQDN" >> /tmp/hosts
}

addifconfig() {
	# $1 - interface name
	# $2 - interface symbolic name
	# $3 - interface IP address
	# $4 - interface netmask
	# $5 - (optional) interface link-layer directives

	# Create a hostname.* file for the interface.
	echo "inet $2 $4 NONE $5" > /tmp/hostname.$1

	addhostent $3 $2
}

configurenetwork() {
	local _ifsdone
	local _ifs
	local _ouranswer
	local _reprompt

	_IFS=`md_get_ifdevs`
	_ifsdone=""
	_ouranswer=""
	_reprompt=1
	resp=""		# force at least one iteration
	while [ "X${resp}" != X"done" ]; do
		if [ $_reprompt = 1 ]; then
			cat << \__configurenetwork_1

You may configure the following network interfaces (the interfaces
marked with [X] have been succesfully configured):

__configurenetwork_1

			for _ifs in $_IFS; do
				if [ "X${_ouranswer}" = "X" ]; then
					_ouranswer=$_ifs
				fi
				if isin $_ifs $_ifsdone ; then
					echo -n "	[X] "
				else
					echo -n "	[ ] "
				fi
				echo $_ifs
			done
			echo	""
		fi
		echo -n	"Configure which interface? (or, enter 'done') [$_ouranswer] "
		getresp "$_ouranswer"
		case "$resp" in
		"done")
			;;
		"")
			_reprompt=0
			;;
		*)
			_ifs=$resp
			if isin $_ifs $_IFS ; then
				if configure_ifs $_ifs ; then
					_ifsdone="$_ifs $_ifsdone"
				fi
			else
				echo "Invalid response: \"$resp\" is not in list"
			fi
			_ouranswer="done"
			_reprompt=1
			;;
		esac

	done
}

configure_ifs() {

	local _up
	local _interface_name
	local _interface_ip
	local _interface_mask
	local _interface_symname
	local _interface_extra
	local _hostname

	_interface_name=$1

	set -- `ifconfig $_interface_name | sed -n '
		1s/.*<UP,.*$/UP/p
		1s/.*<.*>*$/DOWN/p
		2s/inet//
		2s/--> [0-9.][0-9.]*//
		2s/netmask//
		2s/broadcast//
		2p'`

	_up=$1
	_interface_ip=$2
	_interface_mask=$3

	# Get IP address
	resp=""		# force one iteration
	while [ "X${resp}" = X"" ]; do
		echo -n "IP address? [$_interface_ip] "
		getresp "$_interface_ip"
		_interface_ip=$resp
	done

	# Get symbolic name
	_hostname=`hostname`
	resp=""		# force one iteration
	while [ "X${resp}" = X"" ]; do
		echo -n "Symbolic (host) name? [$_hostname] "
		getresp "$_hostname"
		_interface_symname=$resp
	done

	# Get netmask
	resp=""
	if [ "X${_interface_mask}" = X"" ]; then
		_interface_mask=255.255.255.0
	fi
	while [ "X${resp}" = X"" ]; do
		echo -n "Netmask ? [$_interface_mask] "
		getresp "$_interface_mask"
		_interface_mask=$resp
	done

	echo "Your network interface might require additional link-layer"
	echo "directives (like \`link0'). If this is the case you can enter"
	echo "these at the next prompt.  Values used by some drivers are:"
	echo "    -link0            BNC"
	echo "    link0 -link1      AUI"
	echo "    link0 link1       UTP"
	echo "(But please keep in mind not all drivers use flags like this)."
	echo -n "Additional link-layer arguments? [$_interface_extra] "
	getresp "$_interface_extra"
	if [ "X${resp}" != X"" ]; then
		_interface_extra=$resp
	fi

	# Configure the interface.  If it
	# succeeds, add it to the permanent
	# network configuration info.
	if [ $_up != "UP" ]; then
		ifconfig ${_interface_name} down
		if ifconfig ${_interface_name} inet \
		    ${_interface_ip} \
		    netmask ${_interface_mask} ${_interface_extra} up ; then
			addifconfig \
			    ${_interface_name} \
			    ${_interface_symname} \
			    ${_interface_ip} \
			    ${_interface_mask} "${_interface_extra}"
			return 0
		fi
	else
		echo "Interface ${_interface_name} is already active."
		echo "Just saving configuration on new root filesystem."
		addifconfig \
		    ${_interface_name} \
		    ${_interface_symname} \
		    ${_interface_ip} \
		    ${_interface_mask} "${_interface_extra}"
	fi
	return 1
}

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

	# Set up the hostname.
	if [ ! -f /mnt/etc/myname ]; then
		echo "ERROR: no /etc/myname!"
		return 1
	fi
	hostname=`cat /mnt/etc/myname`
	hostname $hostname

	# configure all the interfaces which we know about.
(
	tmp="$IFS"
	IFS="$IFS."
	set -- `echo /mnt/etc/hostname*`
	IFS=$tmp
	unset tmp

	while [ $# -ge 2 ] ; do
		shift		# get rid of "hostname"
		(
			read af name mask bcaddr extras
			read dt dtaddr

			if [ ! -n "$name" ]; then
		    echo "/etc/hostname.$1: invalid network configuration file"
				exit
			fi

			cmd="ifconfig $1 $af $name "
			if [ "${dt}" = "dest" ]; then cmd="$cmd $dtaddr"; fi
			if [ -n "$mask" ]; then cmd="$cmd netmask $mask"; fi
			if [ -n "$bcaddr" -a "X$bcaddr" != "XNONE" ]; then
				cmd="$cmd broadcast $bcaddr";
			fi
			cmd="$cmd $extras"

			$cmd
		) < /mnt/etc/hostname.$1
		shift
	done
)

	# set the address for the loopback interface
	ifconfig lo0 inet localhost

	# use loopback, not the wire
	route add $hostname localhost

	# /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 add default `cat /mnt/etc/mygate`
	fi

	# enable the resolver, if appropriate.
	if [ -f /mnt/etc/resolv.conf ]; then
		_resolver_enabled="TRUE"
		cp /mnt/etc/resolv.conf /tmp/resolv.conf.shadow
	fi

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

	echo	""

	if [ "X${_resolver_enabled}" = X"TRUE" ]; then
		route show
		echo	""
		echo	"Resolver enabled."
	else
		route -n show
		echo	""
		echo	"Resolver not enabled."
	fi

	return 0
}

# Print the selector and get a response
# The list of sets is passed in as $1, sets $resp 
get_selection() {
	local _next
	local _f
	local _sets

	_sets=$1
	_next=""
	for _f in $_sets ; do
		if isin $_f $_setsdone ; then
			echo -n "	[X] "
			_next=""
		else
			echo -n "	[ ] "
			if [ -z "$_next" ]; then
			    _next=$_f
			fi
		fi
		echo $_f
	done

	# Get the name of the file.
	echo -n "File name [$_next]? "
	getresp "$_next"
}

install_url() {
# Get several parameters from the user, and xfer
# files from the server.
# Note:	_ftp_server_ip, _ftp_server_dir, _ftp_server_login,
#	_ftp_server_password, and _ftp_active must be global.

local _sets
local _kernel
local _f
local _file_list
local _get_files
local _failed_files
local _osetsdone
local _url_type
local _url_base
local _tfile
local _matched
local _action

# Is this an ftp or http install?
_url_type=$1; shift

echo
echo "This is an automated ${_url_type}-based installation process.  You will be asked"
echo "questions and then the files will be retrieved iteratively via ftp(1)."
echo
    
# Proxy the connections?
if [ "X${_proxy_host}" = X"" ]; then
	_proxy_host=none
fi
echo -n "HTTP/FTP proxy URL? (if you use a proxy) [${_proxy_host}] "
getresp "${_proxy_host}"
if [ "X${resp}" = X"none" ]; then
	unset _proxy_host ftp_proxy http_proxy
else
	_proxy_host=$resp
	export ftp_proxy=${_proxy_host}
	export http_proxy=${_proxy_host}
fi
if [ "${_url_type}" = "ftp" -a "X$ftp_proxy" = "X" ]; then
	# Use active mode ftp? (irrelevant if using a proxy)
	case "${_ftp_active}" in
		-A)	resp=y ;;
		*)	resp=n ;;
	esac
	echo "By default, ftp will attempt a passive connection and fall back to a normal"
	echo "(active) connection if that doesn't work.  However, there are some very"
	echo "old ftp servers that claim to support passive mode, but really do not."
	echo "In this case, you should explicately request an active session."
	echo -n "Do you want to use active ftp? [${resp}] "
	getresp "${resp}"
	case "$resp" in
		y*|Y*)	_ftp_active=-A ;;
		*)	unset _ftp_active ;;
	esac
fi

# Provide a list of possible servers
echo -n "Do you want a list of potential ${_url_type} servers? [y] "
getresp "y"
case "$resp" in
n*|N*) ;;
*)
	ftp ${_ftp_active} -V -a -o - ftp://ftp.openbsd.org/pub/OpenBSD/${VERSION_MAJOR}.${VERSION_MINOR}/ftplist | grep "^${_url_type}:"
	;;
esac

# Get server IP address
resp=""		# force one iteration
while [ "X${resp}" = X"" ]; do
	eval echo -n "Server IP address or hostname? [\$_${_url_type}_server_ip]\ "
	eval getresp "\$_${_url_type}_server_ip"
	eval _${_url_type}_server_ip=$resp
done

# Get server directory
if [ "${_url_type}" = "ftp" -a "X${_ftp_server_dir}" = X"" ]; then
	# Default ftp dir
	_ftp_server_dir="pub/OpenBSD/${VERSION_MAJOR}.${VERSION_MINOR}/${ARCH}"
fi
resp=""		# force one iteration
while [ "X${resp}" = X"" ]; do
	eval echo -n "Server directory? [\$_${_url_type}_server_dir]\ "
	eval getresp "\$_${_url_type}_server_dir"
	eval _${_url_type}_server_dir=$resp
done

if [ "${_url_type}" = "ftp" ]; then
	# Need default values even if we proxy ftp...
	if [ "X${_ftp_server_login}" = X"" ]; then
		_ftp_server_login=anonymous
	fi
	if [ "X${_ftp_server_password}" = X"" ]; then
		_ftp_server_password=root@`hostname`.${FQDN}
	fi

	# Get login name
	resp=""		# force one iteration
	while [ "X${resp}" = X"" ]; do
		echo -n "Login? [${_ftp_server_login}] "
		getresp "${_ftp_server_login}"
		_ftp_server_login=$resp 
	done

	# Get password unless anonymous
	if [ ${_ftp_server_login} != "anonymous" ]; then
		resp=""		# force one iteration
		while [ "X${resp}" = X"" ]; do
			echo -n "Password (will not echo): "
			stty -echo
			getresp "${_ftp_server_password}"
			stty echo
			echo ""
			_ftp_server_password=$resp

			echo -n "Password (again): "
			stty -echo
			getresp "${_ftp_server_password}"
			stty echo
			echo ""
			if [ "${_ftp_server_password}" != "${resp}" ]; then
				echo "Passwords do not match, try again."
				resp=""
			fi
		done
	else
		# only used by ftp_list_files()
		_ftp_server_password=root@`hostname`.${FQDN}
	fi
fi

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

# Get list of files from the server.
# XXX - check for nil $_file_list and deal
if [ "${_url_type}" = "ftp" -a "X${ftp_proxy}" = X"" ]; then
	_file_list=`ftp_list_files "$_ftp_server_ip" "$_ftp_server_login" "$_ftp_server_password" "$_ftp_server_dir"`
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

_sets=""
if list_has_sets "$_file_list" $THESETS; then
	for _f in $THESETS ; do
		if [ "X${_f}" = "Xkernel" ]; then
			if isin bsd $_file_list; then
				_kernel=bsd
			fi
		elif isin ${_f}${VERSION}.tar.gz $_file_list; then
			_sets="$_sets ${_f}${VERSION}.tar.gz"
		elif isin ${_f}${VERSION}.tgz $_file_list; then
			_sets="$_sets ${_f}${VERSION}.tgz"
		fi
	done
else
	eval echo "There are no OpenBSD install sets available in \"\$_${_url_type}_server_dir\"."
	echo -n "Search for *.tar.gz and *.tgz files? [y] "
	getresp "y"
	case "$resp" in
		n*|N*)	return ;;
		*)	;;
	esac
	# *.tar.gz and *.tgz are possible sets
	_sets=""
	_kernel=""
	for _f in ${_file_list} ; do
		case "$_f" in
		    *.tar.gz|*.tgz)	_sets="$_sets ${_f}"
		esac
	done
	if [ "X${_sets}" = X"" ]; then
		echo "There are no *.tar.gz or *.tgz files in that dir."
		echo -n "See a directory listing? [y] "
		getresp "y"
		case "$resp" in
			n*|N*)	return ;;
			*)	;;
		esac
		echo ""
		echo "${_file_list}"
		echo ""
		return
	else
		echo "Adding *.tar.gz and *.tgz files to selector."
	fi
fi

# Yes, all those blackslashes really are necesary...
eval echo "\\\\n"\
"You will now be asked for files to extract.  In addition to the\\\\n"\
"files listed in the selector you may enter any file located at\\\\n"\
"\$_${_url_type}_server_ip:\$_${_url_type}_server_dir.  You can also enter\\\\n"\
"'all' to install all the standard sets, or 'list' to list the\\\\n"\
"files avilable at \$_${_url_type}_server_ip:\$_${_url_type}_server_dir.\\\\n"\
"When you are done selecting files, enter 'done'.\\\\n"\
"Some of these sets are required for your ${MODE} and some are optional --\\\\n"\
"You will want at least the base and bsd sets.\\\\n"\
"Consult the intallation notes if you are not sure which sets are required!\\\\n"
_osetsdone="$_setsdone"
while : ; do
	echo ""
	echo "The following sets are available for extraction."
	echo "Enter filename, \`list', \`all', or \`done'."
	echo "You may de-select a set by prepending a '-' to it's name."
	echo ""
	get_selection "$_sets $_kernel"

	if [ "X${resp}" = X"done" ]; then
		break
	elif [ "X${resp}" = X"list" ]; then
		echo ""
		eval echo "\$_${_url_type}_server_dir:"
		echo "${_file_list}"
		continue
	elif [ "X${resp}" = X"all" ]; then
		# XXX - setting _setsdone like this
		#       is not entirely correct.
		_get_files="$_sets $_kernel"
		_setsdone="$_sets $_kernel"
		break
	fi

	# Change +/- into add/remove
	_action=add
	case "$resp" in
		+*)	resp="${resp#?}"
			;;
		-*)	resp="${resp#?}"
			_action=remove
			;;
	esac

	# Major hack to allow the user to select globbing patterns
	set -o noglob
	_tfile=/tmp/install_case.$$	# safe in single user mode
	cat >$_tfile << OOF
	case \$_f in
		$resp)	# Add/remove file to extraction list
			if [ "\$_action" = "add" ]; then
				_get_files="\${_get_files} \$_f"
				_setsdone="\$_f \$_setsdone"
			elif [ "\$_action" = "remove" ]; then
				_get_files=\`rmel \$_f \$_get_files\`
				_setsdone=\`rmel \$_f \$_setsdone\`
			else
				echo "Unknown action: \$_action"
			fi
			_matched=\$(( \$_matched + 1 ))
			;;
	esac
OOF
	set +o noglob

	# Eww.
	_matched=0
	for _f in $_sets $_kernel; do
		. $_tfile
	done
	rm -f $_tfile

	if [ $_matched -eq 0 ]; then
		eval echo "File \$_${_url_type}_server_dir/$resp does not exist.  Check to make"
		echo "sure you entered the information properly or enter 'list' for a file list."
	fi
done

# User may have said "done" without selecting any files
if [ "X${_get_files}" = X"" ]; then
	return
fi

echo
echo "Fetching files via ${_url_type} may take a long time, especially over a slow network"
echo -n "connection.  Ready to download files? [y] "
getresp "y"
case "$resp" in
	y*|Y*)
		;;
	*)
		_setsdone="$_osetsdone"
		return
		;;
esac

# Download the files one at a time and keep track of which ones failed
while test -n "${_get_files}" ; do
	_failed_files=""
	for _f in $_get_files ; do
		echo ""
		if [ "X${_f}" = "X${_kernel}" ]; then
			( cd /mnt ; ftp ${_ftp_active} -V ${_url_base}/${_f} )
		else
			( cd /mnt ; ftp ${_ftp_active} -o - -V ${_url_base}/${_f} | tar zxvpf - )
		fi
		if [ $? -ne 0 ]; then
			# Mark xfer as having failed,.
			_setsdone=`rmel $_f $_setsdone`
			_failed_files="${_failed_files} ${_f}"
		fi
	done

	# Give them the option of refetching failed files.
	_get_files=""
	while test -n "${_failed_files}" ; do
		echo ""
		echo "The following files failed to transfer and extract correctly:"
		echo "Choose which one(s) to refetch or 'done' to exit selector."
		echo "You may de-select a file by prepending a '-' to it's name."
		echo ""
		get_selection "$_failed_files"

		if [ "X${resp}" = X"done" ]; then
			break
		elif [ "X${resp}" = X"list" ]; then
			echo ""
			eval echo "\$_${_url_type}_server_dir:"
			echo "${_file_list}"
			echo ""
			continue
		fi

		# Change +/- into add/remove
		_action=add
		case "$resp" in
			+*)	resp="${resp#?}"
				;;
			-*)	resp="${resp#?}"
				_action=remove
				;;
		esac

		# Major hack to allow the user to select globbing patterns
		set -o noglob
		_tfile=/tmp/install_case.$$	# safe in single user mode
		cat >$_tfile << OOF
		case \$_f in
			$resp)	# Add/remove file to extraction list
				if [ "\$_action" = "add" ]; then
					_get_files="\${_get_files} \$_f"
					_setsdone="\$_f \$_setsdone"
				elif [ "\$_action" = "remove" ]; then
					_get_files=\`rmel \$_f \$_get_files\`
					_setsdone=\`rmel \$_f \$_setsdone\`
				else
					echo "Unknown action: \$_action"
				fi
				_matched=\$(( \$_matched + 1 ))
				;;
		esac
OOF
		set +o noglob

		# Eww.
		_matched=0
		for _f in $_failed_files; do
			. $_tfile
		done
		rm -f $_tfile

		if [ $_matched -eq 0 ]; then
			eval echo "File \$_${_url_type}_server_dir/$resp does not exist.  Check to make"
			echo "sure you entered the information properly or enter 'list' for a file list."
		fi
	done
done
}

install_from_mounted_fs() {
# $1 - directory containing installation sets
local _sets
local _kernel
local _f
local _get_files
local _failed_files
local _osetsdone
local _tfile
local _matched
local _action

if [ ! -d $1 ]; then
	echo "No such directory: $1"
	return
fi

_sets=""
if dir_has_sets $1 $THESETS; then
	for _f in $THESETS ; do
		if [ "X${_f}" = "Xkernel" ]; then
			if [ -f $1/bsd ]; then
				_kernel=bsd
			fi
		elif [ -f $1/${_f}${VERSION}.tar.gz ]; then
			_sets="$_sets ${_f}${VERSION}.tar.gz"
		elif [ -f $1/${_f}${VERSION}.tgz ]; then
			_sets="$_sets ${_f}${VERSION}.tgz"
		fi
	done
else
	echo "There are no OpenBSD install sets available in \"$1\"."
	echo -n "Search for *.tar.gz and *.tgz files? [y] "
	getresp "y"
	case "$resp" in
		n*|N*)	return ;;
		*)	;;
	esac
	# *.tar.gz and *.tgz are possible sets
	_sets=""
	_kernel=""
	_sets=`cd $1 ; echo *.tar.gz *.tgz`
	if [ "X${_sets}" = X'*.tar.gz *.tgz' ]; then
		echo "There are no *.tar.gz or *.tgz files in that dir."
		echo -n "See a directory listing? [y] "
		getresp "y"
		case "$resp" in
			n*|N*)	return ;;
			*)	;;
		esac
		echo ""
		( cd $1 && ls )
		echo ""
		return
	else
		echo "Adding *.tar.gz and *.tgz files to selector."
	fi
fi

echo "\n"\
"You will now be asked for files to extract.  In addition to the\n"\
"files listed in the selector you may enter any file located in\n"\
"$1.  You can also enter 'all' to install all the standard\n"\
"sets, or 'list' to list the files avilable in $1.\n"\
"When you are done selecting files, enter 'done'.\n"\
"Some of these sets are required for your ${MODE} and some are optional --\n"\
"You will want at least the base and bsd sets.\n"\
"Consult the intallation notes if you are not sure which sets are required!\n"
_osetsdone="$_setsdone"
while : ; do
	echo ""
	echo "The following sets are available for extraction."
	echo "Enter filename, \`list', \`all', or \`done'."
	echo "You may de-select a set by prepending a '-' to it's name."
	echo ""
	get_selection "$_sets $_kernel"

	if [ "X${resp}" = X"done" ]; then
		break
	elif [ "X${resp}" = X"list" ]; then
		echo ""
		echo "${1}:"
		( cd $1 && ls )
		continue
	elif [ "X${resp}" = X"all" ]; then
		# XXX - setting _setsdone like this
		#       is not entirely correct.
		_get_files="$_sets $_kernel"
		_setsdone="$_sets $_kernel"
		break
	fi

	# Change +/- into add/remove
	_action=add
	case "$resp" in
		+*)	resp="${resp#?}"
			;;
		-*)	resp="${resp#?}"
			_action=remove
			;;
	esac

	# Major hack to allow the user to select globbing patterns
	set -o noglob
	_tfile=/tmp/install_case.$$	# safe in single user mode
	cat >$_tfile << OOF
	case \$_f in
		$resp)	# Add/remove file to extraction list
			if [ "\$_action" = "add" ]; then
				_get_files="\${_get_files} \$_f"
				_setsdone="\$_f \$_setsdone"
			elif [ "\$_action" = "remove" ]; then
				_get_files=\`rmel \$_f \$_get_files\`
				_setsdone=\`rmel \$_f \$_setsdone\`
			else
				echo "Unknown action: \$_action"
			fi
			_matched=\$(( \$_matched + 1 ))
			;;
	esac
OOF
	set +o noglob

	# Eww.
	_matched=0
	for _f in $_sets $_kernel; do
		. $_tfile
	done
	rm -f $_tfile

	if [ $_matched = 0 ]; then
	    echo "File $1/$resp does not exist.  Check to make"
	    echo "sure you entered the information properly or enter 'list' for a file list."
	fi
done

# User may have said "done" without selecting any files
if [ "X${_get_files}" = X"" ]; then
	return
fi

echo
echo -n "Ready to extract selected file sets? [y] "
getresp "y"
case "$resp" in
	y*|Y*)
		;;
	*)
		_setsdone="$_osetsdone"
		return
		;;
esac

# Extract the files one at a time and keep track of which ones failed
while test -n "${_get_files}" ; do
	_failed_files=""
	for _f in $_get_files ; do
		echo ""
		echo "$1/${_f}:"
		if [ "X${_f}" = "X${_kernel}" ]; then
			cp $1/$_f /mnt/$_f
		else
			cat $1/$_f | (cd /mnt; tar -zxvpf -)
		fi
		if [ $? -ne 0 ]; then
			# Mark xfer as having failed,.
			_setsdone=`rmel $_f $_setsdone`
			_failed_files="${_failed_files} ${_f}"
		fi
	done

	# Give them the option of retrying failed files.
	_get_files=""
	while test -n "${_failed_files}" ; do
		echo ""
		echo "The following files failed to extract correctly:"
		echo "Choose which one(s) to retry or 'done' to exit selector."
		echo "You may de-select a file by prepending a '-' to it's name."
		echo ""
		get_selection "$_failed_files"

		if [ "X${resp}" = X"done" ]; then
			break
		elif [ "X${resp}" = X"list" ]; then
			echo ""
			echo "${1}:"
			( cd $1 && ls )
			echo ""
			continue
		fi

		# Change +/- into add/remove
		_action=add
		case "$resp" in
			+*)	resp="${resp#?}"
				;;
			-*)	resp="${resp#?}"
				_action=remove
				;;
		esac

		# Major hack to allow the user to select globbing patterns
		set -o noglob
		_tfile=/tmp/install_case.$$	# safe in single user mode
		cat >$_tfile << OOF
		case \$_f in
			$resp)	# Add/remove file to extraction list
				if [ "\$_action" = "add" ]; then
					_get_files="\${_get_files} \$_f"
					_setsdone="\$_f \$_setsdone"
				elif [ "\$_action" = "remove" ]; then
					_get_files=\`rmel \$_f \$_get_files\`
					_setsdone=\`rmel \$_f \$_setsdone\`
				else
					echo "Unknown action: \$_action"
				fi
				_matched=\$(( \$_matched + 1 ))
				;;
		esac
OOF
		set +o noglob

		# Eww.
		_matched=0
		for _f in $_failed_files; do
			. $_tfile
		done
		rm -f $_tfile

		if [ $_matched = 0 ]; then
		    echo "File $1/$resp does not exist.  Check to make"
		    echo "sure you entered the information properly or enter 'list' for a file list."
		fi
	done
done
}

install_cdrom() {
local _drive
local _partition_range
local _partition
local _fstype
local _directory

# Get the cdrom device info
cat << \__install_cdrom_1

The following CD-ROM devices are installed on your system; please select
the CD-ROM device containing the partition with the installation sets:

__install_cdrom_1
_CDDEVS=`md_get_cddevs`
echo    "$_CDDEVS"
echo	""
echo -n	"Which is the CD-ROM with the installation media? [abort] "
getresp "abort"
case "$resp" in
	abort)
		echo "Aborting."
		return
		;;

	*)
		if isin $resp $_CDDEVS ; then
			_drive=$resp
		else
			echo ""
			echo "The CD-ROM $resp does not exist."
			echo "Aborting."
			return
		fi
		;;
esac

# Get partition
_partition_range=`md_get_partition_range`
resp=""		# force one iteration
while [ "X${resp}" = X"" ]; do
	echo -n "Partition? [c] "
	getresp "c"
	case "$resp" in
		$_partition_range)
			_partition=$resp
			;;

		*)
			echo "Invalid response: $resp"
			resp=""		# force loop to repeat
			;;
	esac
done

# Ask for filesystem type
cat << \__install_cdrom_2

There are two CD-ROM filesystem types currently supported by this program:
cd9660		ISO-9660
ffs		Berkeley Fast Filesystem

__install_cdrom_2
resp=""		# force one iteration
while [ "X${resp}" = X"" ]; do
	echo -n "Which filesystem type? [cd9660] "
	getresp "cd9660"
	case "$resp" in
		cd9660|ffs)
			_fstype=$resp
			;;

		*)
			echo "Invalid response: $resp"
			resp=""		# force loop to repeat
			;;
	esac
done

# Mount the CD-ROM
if ! mount -t ${_fstype} -o ro \
    /dev/${_drive}${_partition} /mnt2 ; then
	echo "Cannot mount CD-ROM drive.  Aborting."
	return
fi

# Get the directory where the file lives
if [ "X${_directory}" = X"" ]; then
	_directory="/${VERSION_MAJOR}.${VERSION_MINOR}/${ARCH}"
fi
resp=""		# force one iteration
while [ "X${resp}" = X"" ]; do
	echo "Enter the directory relative to the mount point that"
	echo -n "contains the file. [${_directory}] "
	getresp "${_directory}"
done
_directory=$resp

install_from_mounted_fs /mnt2/${_directory}
umount -f /mnt2 > /dev/null 2>&1
}

mount_a_disk() {
# Mount a disk on /mnt2. The set of disk devices to choose from
# is $_DKDEVS.
# returns 0 on failure.

local _drive
local _def_partition
local _partition_range
local _partition
local _fstype
local _fsopts
local _directory
local _md_fstype
local _md_fsopts

getresp "abort"
case "$resp" in
	abort)
		echo "Aborting."
		return 0
		;;

	*)
		if isin $resp $_DKDEVS ; then
			_drive=$resp
		else
			echo ""
			echo "The disk $resp does not exist."
			echo "Aborting."
			return 0
		fi
		;;
esac

# Get partition
cat <<__mount_a_disk_1

The following partitions have been found on $_drive:

__mount_a_disk_1
disklabel $_drive 2>/dev/null | grep '^  .:'
echo
_likely_partition_range=`disklabel $_drive 2>/dev/null | \
    sed -n -e '/swap/s/.*//' -e '/unused/s/.*//' \
	-e '/^  .:/{s/^  \(.\).*/\1/;H;}' \
	-e '${g;s/\n//g;s/^/[/;s/$/]/p;}'`
_partition_range=`disklabel $_drive 2>/dev/null | \
    sed -n -e '/^  .:/{s/^  \(.\).*/\1/;H;}' \
	-e '${g;s/\n//g;s/^/[/;s/$/]/p;}'`
_def_partition=`echo $_likely_partition_range | \
    sed -n 's/^\[\(.\).*\]/\1/p'`
if [ -z "$_def_partition" ]; then
	_def_partition=`echo $_partition_range | \
	    sed -n 's/^\[\(.\).*\]/\1/p'`
	if [ -z "$_def_partition" ]; then
		echo "There are no usable partitions on that disk"
		return 0
	fi
fi 
resp=""		# force one iteration
while [ "X${resp}" = X"" ]; do
	echo -n "Partition? [$_def_partition] "
	getresp "$_def_partition"
	case "$resp" in
		$_partition_range)
			_partition=$resp
			;;

		*)
			echo "Invalid response: $resp"
			resp=""		# force loop to repeat
			;;
	esac
done

# Ask for filesystem type
cat << \__mount_a_disk_2

The following filesystem types are supported:
default		(deduced from the disklabel)
ffs
__mount_a_disk_2
_md_fstype=`md_native_fstype`
_md_fsopts=`md_native_fsopts`
if [ ! -z "$_md_fstype" ]; then
	echo "	$_md_fstype"
else
	_md_fstype="_undefined_"
fi
resp=""		# force one iteration
while [ "X${resp}" = X"" ]; do
	echo -n "Which filesystem type? [default] "
	getresp "default"
	case "$resp" in
		default)
			_fstype=""
			_fsopts="ro"
			;;
		ffs)
			_fstype="-t $resp"
			_fsopts="ro"
			;;
		$_md_fstype)
			_fstype="-t $resp"
			_fsopts=$_md_fsopts
			;;
		*)
			echo "Invalid response: $resp"
			resp=""		# force loop to repeat
			;;
	esac
done

# Mount the disk
if ! mount $_fstype -o $_fsopts /dev/${_drive}${_partition} /mnt2; then
	echo "Cannot mount disk.  Aborting."
	return 0
fi
return 1
}

install_disk() {
local _directory

cat << \__install_disk_1

The following disk devices are installed on your system; please select
the disk device containing the partition with the installation sets:

__install_disk_1
_DKDEVS=`md_get_diskdevs`
echo    "$_DKDEVS"
echo	""
echo -n	"Which is the disk with the installation sets? [abort] "

if mount_a_disk ; then
	return
fi

# Get the directory where the file lives
resp=""		# force one iteration
while [ "X${resp}" = X"" ]; do
	echo "Enter the directory relative to the mount point that"
	echo -n "contains the file. [${_directory}] "
	getresp "${_directory}"
done
_directory=$resp

install_from_mounted_fs /mnt2/${_directory}
umount -f /mnt2 > /dev/null 2>&1
}

install_nfs() {
# Get the IP address of the server
resp=""		# force one iteration
while [ "X${resp}" = X"" ]; do
	echo -n "Server IP address or hostname? [${_nfs_server_ip}] "
	getresp "${_nfs_server_ip}"
done
_nfs_server_ip=$resp

# Get server path to mount
resp=""		# force one iteration
while [ "X${resp}" = X"" ]; do
	echo -n "Filesystem on server to mount? [${_nfs_server_path}] "
	getresp "${_nfs_server_path}"
done
_nfs_server_path=$resp

# Determine use of TCP
echo -n "Use TCP transport (only works with capable NFS server)? [n] "
getresp "n"
case "$resp" in
	y*|Y*)
		_nfs_tcp="-T"
		;;

	*)
		_nfs_tcp=""
		;;
esac

# Mount the server
mkdir /mnt2 > /dev/null 2>&1
if ! mount_nfs $_nfs_tcp ${_nfs_server_ip}:${_nfs_server_path} \
    /mnt2 ; then
	echo "Cannot mount NFS server.  Aborting."
	return
fi

# Get the directory where the file lives
resp=""		# force one iteration
while [ "X${resp}" = X"" ]; do
	echo "Enter the directory relative to the mount point that"
	echo -n "contains the file. [${_nfs_directory}] "
	getresp "${_nfs_directory}"
done
_nfs_directory=$resp

install_from_mounted_fs /mnt2/${_nfs_directory}
umount -f /mnt2 > /dev/null 2>&1
}

install_tape() {
local _xcmd

# Get the name of the tape from the user.
cat << \__install_tape_1

The installation program needs to know which tape device to use.  Make
sure you use a "no rewind on close" device.

__install_tape_1
_tape=`basename $TAPE`
resp=""		# force one iteration
while [ "X${resp}" = X"" ]; do
	echo -n "Name of tape device? [${_tape}]"
	getresp "${_tape}"
done
_tape=`basename $resp`
TAPE="/dev/${_tape}"
if [ ! -c $TAPE ]; then
	echo "$TAPE does not exist or is not a character special file."
	echo "Aborting."
	return
fi
export TAPE

# Rewind the tape device
echo -n "Rewinding tape..."
if ! mt rewind ; then
	echo "$TAPE may not be attached to the system or may not be"
	echo "a tape device.  Aborting."
	return
fi
echo "done."

# Get the file number
resp=""		# force one iteration
while [ "X${resp}" = X"" ]; do
	echo -n "File number? "
	getresp ""
	case "$resp" in
		[1-9]*)
			_nskip=`expr $resp - 1`
			;;

		*)
			echo "Invalid file number ${resp}."
			resp=""		# fore loop to repeat
			;;
	esac
done

# Skip to correct file.
echo -n "Skipping to source file..."
if [ "X${_nskip}" != X"0" ]; then
	if ! mt fsf $_nskip ; then
		echo "Could not skip $_nskip files.  Aborting."
		return
	fi
fi
echo "done."

cat << \__install_tape_2

There are 2 different ways the file can be stored on tape:

1) an image of a gzipped tar file
2) a standard tar image

__install_tape_2
resp=""		# force one iteration
while [ "X${resp}" = X"" ]; do
	echo -n "Which way is it? [1] "
	getresp "1"
	case "$resp" in
	1)
		_xcmd="tar -zxvpf -"
		;;

	2)
		_xcmd="tar -xvpf -"
		;;

	*)
		echo "Invalid response: $resp."
		resp=""		# force loop to repeat
		;;
	esac
	( cd /mnt; dd if=$TAPE | $_xcmd )
done
echo "Extraction complete."
}

get_timezone() {
local _a
local _zonepath

#
# If the zoneinfo is not on the installation medium or on the
# installed filesystem, set TZ to GMT and return immediatly.
#
if [ ! -e /usr/share/zoneinfo -a ! -e /mnt/usr/share/zoneinfo ]; then
	TZ=GMT
	return
fi
if [ ! -d /usr/share/zoneinfo ]; then
	_zonepath=/mnt
else
	_zonepath=""
fi
	
cat << \__get_timezone_1

Select a time zone for your location. Timezones are represented on the
system by a directory structure rooted in "/usr/share/timezone". Most
timezones can be selected by entering a token like "MET" or "GMT-6".
Other zones are grouped by continent, with detailed zone information
separated by a slash ("/"), e.g. "US/Pacific".

To get a listing of what's available in /usr/share/zoneinfo, enter "?"
at the prompts below.

__get_timezone_1
if [ X$TZ = X ]; then
	TZ=`ls -l /mnt/etc/localtime 2>/dev/null | cutlast`
	TZ=${TZ#/usr/share/zoneinfo/}
fi
while : ; do
	echo -n	"What timezone are you in [\`?' for list] [$TZ]? "
	getresp "$TZ"
	case "$resp" in
	"")
		echo "Timezone defaults to GMT"
		TZ="GMT"
		break;
		;;
	"?")
		ls ${_zonepath}/usr/share/zoneinfo
		;;
	*)
		_a=$resp
		while [ -d ${_zonepath}/usr/share/zoneinfo/$_a ]; do
			echo -n "There are several timezones available"
			echo " within zone '$_a'"
			echo -n "Select a sub-timezone [\`?' for list]: "
			getresp ""
			case "$resp" in
			"?") ls ${_zonepath}/usr/share/zoneinfo/$_a ;;
			*)	_a=${_a}/${resp}
				if [ -f ${_zonepath}/usr/share/zoneinfo/$_a ]; then
					break;
				fi
				;;
			esac
		done
		if [ -f ${_zonepath}/usr/share/zoneinfo/$_a ]; then
			TZ="$_a"
			echo "You have selected timezone \"$_a\"".
			return
		fi
		echo "'/usr/share/zoneinfo/$_a' is not a valid timezone on this system."
		;;
	esac
done
}

install_sets()
{
local _yup
_yup="FALSE"

# Ask the user which media to load the distribution from.
cat << \__install_sets_1

It is now time to extract the installation sets onto the hard disk.  Make sure
the sets are either on a local device (i.e. tape, CD-ROM) or on a network
server.  You will have the chance to repeat this step or to extract sets from
several places, so you don't have to try to load all the sets in one try and
can recover from some errors.

__install_sets_1

if [ "X$local_sets_dir" != "X" ]; then
	install_from_mounted_fs ${local_sets_dir}
	if [ X"$_setsdone" != X ]; then
		_yup="TRUE"
	fi
fi

# Go on prodding for alternate locations
resp=""		# force at least one iteration
while [ X"${resp}" = X ]; do
	# If _yup is not FALSE, it means that we extracted sets above.
	# If that's the case, bypass the menu the first time.
	if [ X"$_yup" = X"FALSE" ]; then
		echo -n	"Install from (f)tp, h(ttp), (t)ape, (C)D-ROM,"
		echo -n " (N)FS or local (d)isk? "
		getresp ""
		case "$resp" in
		d*|D*)
			install_disk
			resp=d
			;;
		f*|F*)
			install_url ftp
			resp=f
			;;
		h*|H*)
			install_url http
			resp=h
			;;
		t*|T*)
			install_tape
			resp=t
			;;
		c*|C*)
			install_cdrom
			resp=c
			;;
		n*|N*)
			install_nfs
			resp=n
			;;
		*)
			echo "Invalid response: $resp"
			resp=""
			;;
		esac
	else
		_yup="FALSE"	# So we'll ask next time
	fi

	if [ ! -f /mnt/bsd ]; then
		cat << \__install_sets_2

You still do not have a /bsd in your filesystem (ie. the kernel), which
seems to indicate that you are still missing important distribution files.
So please continue installing...
__install_sets_2
		resp=""
	fi
	if [ ! -f /mnt/bin/cat ]; then
		cat << \__install_sets_3

You still do not have a /bin/cat in your filesystem (ie. a sample random file
which you probably want). This seems to indicate that you are still missing
important distribution files. So please continue installing...
__install_sets_3
		resp=""
	fi

	# Give the user the opportunity to extract more sets. They
	# don't necessarily have to come from the same media.
	echo	""
	echo -n	"Extract more sets? [n] "
	getresp "n"
	case "$resp" in
	y*|Y*)
		# Force loop to repeat
		resp=""
		;;

	*)
		;;
	esac
done
}

munge_fstab()
{
local _fstab
local _fstab_shadow
local _dev
local _mp
local _fstype
local _rest

# Now that the 'real' fstab is configured, we munge it into a 'shadow'
# fstab which we'll use for mounting and unmounting all of the target
# filesystems relative to /mnt.  Mount all filesystems.
_fstab=$1
_fstab_shadow=$2
( while read _dev _mp _fstype _rest; do
	# Skip comment lines
	case "$_dev" in
		\#*)	continue;;
		*)	;;
	esac
	# and some filesystem types (like there are swap,kernfs,...)
	case "$_fstype" in
		ffs|ufs|nfs)	;;
		*)	continue;;
	esac
	if [ "$_mp" = "/" ]; then
		echo $_dev /mnt $_fstype $_rest
	else
		echo $_dev /mnt$_mp $_fstype $_rest
	fi
    done ) < $_fstab > $_fstab_shadow
}

mount_fs()
{
# Must mount filesystems manually, one at a time, so we can make
# sure the mount points exist.
# $1 is a file in fstab format
local _fstab

_fstab=$1

( while read line; do
	set -- $line
	_dev=$1
	_mp=$2
	_fstype=$3
	_opt=$4

	# If not the root filesystem, make sure the mount
	# point is present.
	if [ "X{$_mp}" != X"/mnt" ]; then
		mkdir -p $_mp
	fi

	# Mount the filesystem.  If the mount fails, exit
	# with an error condition to tell the outer
	# later to bail.
	if ! mount -v -t $_fstype -o $_opt $_dev $_mp ; then
		# error message displated by mount
		exit 1
	fi
done ) < $_fstab

if [ "X${?}" != X"0" ]; then
	cat << \__mount_filesystems_1

FATAL ERROR:  Cannot mount filesystems.  Double-check your configuration
and restart the installation process.
__mount_filesystems_1
	exit
fi
}

unmount_fs()
{
# Unmount all filesystems and check their integrity.
# Usage: [-check] <fstab file>
local _check
local _fstab
local _pid

if [ "$1" = "-check" ]; then
	_check=1
	_fstab=$2
else
	_check=0
	_fstab=$1
fi

if [ ! \( -f $_fstab -a -s $_fstab \) ]; then
	echo "fstab empty" > /dev/tty
	return
fi

(
	_devs=""
	_mps=""
	# maintain reverse order
	while read line; do
		set -- $line
		_devs="$1 ${_devs}"
		_mps="$2 ${_mps}"
	done
	echo -n "Umounting filesystems... "
	for _mp in ${_mps}; do
		echo -n "${_mp} "
		umount ${_mp}
	done
	echo "Done."

	if [ $_check = 1 ]; then
		echo "Checking filesystem integrity..."
		for _dev in ${_devs}; do
			echo  "${_dev}"
			fsck -f ${_dev}
		done
	fi
	echo "Done."
) < $_fstab
}

check_fs()
{
# Check filesystem integrity.
# $1 is a file in fstab format
local _fstab

_fstab=$1

(
	_devs=""
	_mps=""
	while read line; do
		set -- $line
		_devs="$1 ${_devs}"
		_mps="$2 ${_mps}"
	done

	echo "Checking filesystem integrity..."
	for _dev in ${_devs}; do
		echo  "${_dev}"
		fsck -f ${_dev}
	done
	echo "Done."
) < $_fstab
}