#!/bin/sh
#
# $NetBSD: postinstall,v 1.214.4.2 2019/05/14 11:33:43 martin Exp $
#
# Copyright (c) 2002-2015 The NetBSD Foundation, Inc.
# All rights reserved.
#
# This code is derived from software contributed to The NetBSD Foundation
# by Luke Mewburn.
#
# 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 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 FOUNDATION 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.
#
# postinstall
#	Check for or fix configuration changes that occur
#	over time as NetBSD evolves.
#

#
# XXX BE SURE TO USE ${DEST_DIR} PREFIX BEFORE ALL REAL FILE OPERATIONS XXX
#

#
# checks to add:
#	- sysctl(8) renames (net.inet6.ip6.bindv6only -> net.inet6.ip6.v6only)
#	- de* -> tlp* migration (/etc/ifconfig.de*, $ifconfig_de*,
#	  dhclient.conf, ...) ?
#	- support quiet/verbose mode ?
#	- differentiate between failures caused by missing source
#	  and real failures
#	- install moduli into usr/share/examples/ssh and use from there?
#	- differentiate between "needs fix" versus "can't fix" issues
#

# This script is executed as part of a cross build.  Allow the build
# environment to override the locations of some tools.
: ${AWK:=awk}
: ${DB:=db}
: ${GREP:=grep}
: ${HOST_SH:=sh}
: ${MAKE:=make}
: ${PWD_MKDB:=/usr/sbin/pwd_mkdb}
: ${SED:=sed}
: ${SORT:=sort}
: ${STAT:=stat}

#
#	helper functions
#

err()
{
	exitval=$1
	shift
	echo 1>&2 "${PROGNAME}: $*"
	if [ -n "${SCRATCHDIR}" ]; then
	    /bin/rm -rf "${SCRATCHDIR}"
	fi
	exit ${exitval}
}

warn()
{
	echo 1>&2 "${PROGNAME}: $*"
}

msg()
{
	echo "	$*"
}

mkdtemp()
{
	# Make sure we don't loop forever if mkdir will always fail.
	[ -d /tmp ] || err 2 /tmp is not a directory
	[ -w /tmp ] || err 2 /tmp is not writable

	_base="/tmp/_postinstall.$$"
	_serial=0

	while true; do
		_dir="${_base}.${_serial}"
		mkdir -m 0700 "${_dir}" && break
		_serial=$((${_serial} + 1))
	done
	echo "${_dir}"
}

# Quote args to make them safe in the shell.
# Usage: quotedlist="$(shell_quote args...)"
#
# After building up a quoted list, use it by evaling it inside
# double quotes, like this:
#    eval "set -- $quotedlist"
# or like this:
#    eval "\$command $quotedlist \$filename"
#
shell_quote()
{(
	local result=''
	local arg qarg
	LC_COLLATE=C ; export LC_COLLATE # so [a-zA-Z0-9] works in ASCII
	for arg in "$@" ; do
		case "${arg}" in
		'')
			qarg="''"
			;;
		*[!-./a-zA-Z0-9]*)
			# Convert each embedded ' to '\'',
			# then insert ' at the beginning of the first line,
			# and append ' at the end of the last line.
			# Finally, elide unnecessary '' pairs at the
			# beginning and end of the result and as part of
			# '\'''\'' sequences that result from multiple
			# adjacent quotes in he input.
			qarg="$(printf "%s\n" "$arg" | \
			    ${SED:-sed} -e "s/'/'\\\\''/g" \
				-e "1s/^/'/" -e "\$s/\$/'/" \
				-e "1s/^''//" -e "\$s/''\$//" \
				-e "s/'''/'/g"
				)"
			;;
		*)
			# Arg is not the empty string, and does not contain
			# any unsafe characters.  Leave it unchanged for
			# readability.
			qarg="${arg}"
			;;
		esac
		result="${result}${result:+ }${qarg}"
	done
	printf "%s\n" "$result"
)}

# Convert arg $1 to a basic regular expression (as in sed)
# that will match the arg.  This works by inserting backslashes
# before characters that are special in basic regular expressions.
# It also inserts backslashes before the extra characters specified
# in $2 (which defaults to "/,").
# XXX: Does not handle embedded newlines.
# Usage: regex="$(bre_quote "${string}")"
bre_quote()
{
	local arg="$1"
	local extra="${2-/,}"
	printf "%s\n" "${arg}" | ${SED} -e 's/[][^$.*\\'"${extra}"']/\\&/g'
}

# unprefix dir
#	Remove any dir prefix from a list of paths on stdin,
#	and write the result to stdout.  Useful for converting
#	from ${DEST_DIR}/path to /path.
#
unprefix()
{
	[ $# -eq 1 ] || err 3 "USAGE: unprefix dir"
	local prefix="${1%/}"
	prefix="$(bre_quote "${prefix}")"

	${SED} -e "s,^${prefix}/,/,"
}

# additem item description
#	Add item to list of supported items to check/fix,
#	which are checked/fixed by default if no item is requested by user.
#
additem()
{
	[ $# -eq 2 ] || err 3 "USAGE: additem item description"
	defaultitems="${defaultitems}${defaultitems:+ }$1"
	eval desc_$1=\"\$2\"
}

# adddisableditem item description
#	Add item to list of supported items to check/fix,
#	but execute the item only if the user asks for it explicitly.
#
adddisableditem()
{
	[ $# -eq 2 ] || err 3 "USAGE: adddisableditem item description"
	otheritems="${otheritems}${otheritems:+ }$1"
	eval desc_$1=\"\$2\"
}

# checkdir op dir mode
#	Ensure dir exists, and if not, create it with the appropriate mode.
#	Returns 0 if ok, 1 otherwise.
#
check_dir()
{
	[ $# -eq 3 ] || err 3 "USAGE: check_dir op dir mode"
	_cdop="$1"
	_cddir="$2"
	_cdmode="$3"
	[ -d "${_cddir}" ] && return 0
	if [ "${_cdop}" = "check" ]; then
		msg "${_cddir} is not a directory"
		return 1
	elif ! mkdir -m "${_cdmode}" "${_cddir}" ; then
		msg "Can't create missing ${_cddir}"
		return 1
	else
		msg "Missing ${_cddir} created"
	fi
	return 0
}

# check_ids op type file srcfile start id [...]
#	Check if file of type "users" or "groups" contains the relevant IDs.
#	Use srcfile as a reference for the expected contents.
#	The specified "id" names should be given in numerical order,
#	with the first name corresponding to numerical value "start",
#	and with the special name "SKIP" being used to mark gaps in the
#	sequence.
#	Returns 0 if ok, 1 otherwise.
#
check_ids()
{
	[ $# -ge 6 ] || err 3 "USAGE: checks_ids op type file start srcfile id [...]"
	_op="$1"
	_type="$2"
	_file="$3"
	_srcfile="$4"
	_start="$5"
	shift 5
	#_ids="$@"

	if [ ! -f "${_file}" ]; then
		msg "${_file} doesn't exist; can't check for missing ${_type}"
		return 1
	fi
	if [ ! -r "${_file}" ]; then
		msg "${_file} is not readable; can't check for missing ${_type}"
		return 1
	fi
	_notfixed=""
	if [ "${_op}" = "fix" ]; then
		_notfixed="${NOT_FIXED}"
	fi
	_missing="$(${AWK} -v start=$_start -F: '
		BEGIN {
			for (x = 1; x < ARGC; x++) {
				if (ARGV[x] == "SKIP")
					continue;
				idlist[ARGV[x]]++;
				value[ARGV[x]] = start + x - 1;
			}
			ARGC=1
		}
		{
			found[$1]++
			number[$1] = $3
		}
		END {
			for (id in idlist) {
				if (!(id in found))
					printf("%s (missing)\n", id)
				else if (number[id] != value[id])
					printf("%s (%d != %d)\n", id,
					    number[id], value[id])
				start++;
			}
		}
	' "$@" < "${_file}")"	|| return 1
	if [ -n "${_missing}" ]; then
		msg "Error ${_type}${_notfixed}:" $(echo ${_missing})
		msg "Use the following as a template:"
		set -- ${_missing}
		while [ $# -gt 0 ]
		do
			${GREP} -E "^${1}:" ${_srcfile}
			shift 2
		done
		msg "and adjust if necessary."
		return 1
	fi
	return 0
}

# populate_dir op onlynew src dest mode file [file ...]
#	Perform op ("check" or "fix") on files in src/ against dest/
#	If op = "check" display missing or changed files, optionally with diffs.
#	If op != "check" copies any missing or changed files.
#	If onlynew evaluates to true, changed files are ignored.
#	Returns 0 if ok, 1 otherwise.
#
populate_dir()
{
	[ $# -ge 5 ] || err 3 "USAGE: populate_dir op onlynew src dest mode file [...]"
	_op="$1"
	_onlynew="$2"
	_src="$3"
	_dest="$4"
	_mode="$5"
	shift 5
	#_files="$@"

	if [ ! -d "${_src}" ]; then
		msg "${_src} is not a directory; skipping check"
		return 1
	fi
	check_dir "${_op}" "${_dest}" 755 || return 1

	_cmpdir_rv=0
	for f in "$@"; do
		fs="${_src}/${f}"
		fd="${_dest}/${f}"
		_error=""
		if [ ! -f "${fd}" ]; then
			_error="${fd} does not exist"
		elif ! cmp -s "${fs}" "${fd}" ; then
			if $_onlynew; then	# leave existing ${fd} alone
				continue;
			fi
			_error="${fs} != ${fd}"
		else
			continue
		fi
		if [ "${_op}" = "check" ]; then
			msg "${_error}"
			if [ -n "${DIFF_STYLE}" -a -f "${fd}" ]; then
				diff -${DIFF_STYLE} ${DIFF_OPT} "${fd}" "${fs}"
			fi
			_cmpdir_rv=1
		elif ! rm -f "${fd}" ||
		     ! cp -f "${fs}" "${fd}"; then
			msg "Can't copy ${fs} to ${fd}"
			_cmpdir_rv=1
		elif ! chmod "${_mode}" "${fd}"; then
			msg "Can't change mode of ${fd} to ${_mode}"
			_cmpdir_rv=1
		else
			msg "Copied ${fs} to ${fd}"
		fi
	done
	return ${_cmpdir_rv}
}

# compare_dir op src dest mode file [file ...]
#	Perform op ("check" or "fix") on files in src/ against dest/
#	If op = "check" display missing or changed files, optionally with diffs.
#	If op != "check" copies any missing or changed files.
#	Returns 0 if ok, 1 otherwise.
#
compare_dir()
{
	[ $# -ge 4 ] || err 3 "USAGE: compare_dir op src dest mode file [...]"
	_op="$1"
	_src="$2"
	_dest="$3"
	_mode="$4"
	shift 4
	#_files="$@"

	populate_dir "$_op" false "$_src" "$_dest" "$_mode" "$@"
}

# move_file op src dest --
#	Check (op == "check") or move (op != "check") from src to dest.
#	Returns 0 if ok, 1 otherwise.
#
move_file()
{
	[ $# -eq 3 ] || err 3 "USAGE: move_file op src dest"
	_fm_op="$1"
	_fm_src="$2"
	_fm_dest="$3"

	if [ -f "${_fm_src}" -a ! -f "${_fm_dest}" ]; then
		if [ "${_fm_op}" = "check" ]; then
			msg "Move ${_fm_src} to ${_fm_dest}"
			return 1
		fi
		if ! mv "${_fm_src}" "${_fm_dest}"; then
			msg "Can't move ${_fm_src} to ${_fm_dest}"
			return 1
		fi
		msg "Moved ${_fm_src} to ${_fm_dest}"
	fi
	return 0
}

# rcconf_is_set op name var [verbose] --
#	Load the rcconf for name, and check if obsolete rc.conf(5) variable
#	var is defined or not.
#	Returns 0 if defined (even to ""), otherwise 1.
#	If verbose != "", print an obsolete warning if the var is defined.
#
rcconf_is_set()
{
	[ $# -ge 3 ] || err 3 "USAGE: rcconf_is_set op name var [verbose]"
	_rcis_op="$1"
	_rcis_name="$2"
	_rcis_var="$3"
	_rcis_verbose="$4"
	_rcis_notfixed=""
	if [ "${_rcis_op}" = "fix" ]; then
		_rcis_notfixed="${NOT_FIXED}"
	fi
	(
		for f in \
		    "${DEST_DIR}/etc/rc.conf" \
		    "${DEST_DIR}/etc/rc.conf.d/${_rcis_name}"; do
			[ -f "${f}" ] && . "${f}"
		done
		eval echo -n \"\${${_rcis_var}}\" 1>&3
		if eval "[ -n \"\${${_rcis_var}}\" \
			    -o \"\${${_rcis_var}-UNSET}\" != \"UNSET\" ]"; then
			if [ -n "${_rcis_verbose}" ]; then
				msg \
    "Obsolete rc.conf(5) variable '\$${_rcis_var}' found.${_rcis_notfixed}"
			fi
			exit 0
		else
			exit 1
		fi
	)
}

# rcvar_is_enabled var
#	Check if rcvar is enabled
#
rcvar_is_enabled()
{
	[ $# -eq 1 ] || err 3 "USAGE: rcvar_is_enabled var"
	_rcie_var="$1"
	(
		[ -f "${DEST_DIR}/etc/rc.conf" ] && . "${DEST_DIR}/etc/rc.conf"
		eval _rcie_val=\"\${${_rcie_var}}\"
		case $_rcie_val in
		#	"yes", "true", "on", or "1"
		[Yy][Ee][Ss]|[Tt][Rr][Uu][Ee]|[Oo][Nn]|1)
			exit 0
			;;

		*)
			exit 1
			;;
		esac
	)
}

# find_file_in_dirlist() file message dir1 [...] --
#	Find which directory file is in, and sets ${dir} to match.
#	Returns 0 if matched, otherwise 1 (and sets ${dir} to "").
#
#	Generally, check the directory for the "checking from source" case,
#	and then the directory for the "checking from extracted etc.tgz" case.
#
find_file_in_dirlist()
{
	[ $# -ge 3 ] || err 3 "USAGE: find_file_in_dirlist file msg dir1 [...]"

	_file="$1" ; shift
	_msg="$1" ; shift
	_dir1st=	# first dir in list
	for dir in "$@"; do
		: ${_dir1st:="${dir}"}
		if [ -f "${dir}/${_file}" ]; then
			if [ "${_dir1st}" != "${dir}" ]; then
				msg \
    "(Checking for ${_msg} from ${dir} instead of ${_dir1st})"
			fi
			return 0
		fi
	done
	msg "Can't find source directory for ${_msg}"
	return 1
}

# file_exists_exact path
#	Returns true if a file exists in the ${DEST_DIR} whose name
#	is exactly ${path}, interpreted in a case-sensitive way
#	even if the underlying file system is case-insensitive.
#
#	The path must begin with '/' or './', and is interpreted as
#	being relative to ${DEST_DIR}.
#
file_exists_exact()
{
	[ -n "$1" ] || err 3 "USAGE: file_exists_exact path"
	_path="${1#.}"
	[ -h "${DEST_DIR}${_path}" ] || \
		[ -e "${DEST_DIR}${_path}" ] || return 1
	while [ "${_path}" != "/" -a "${_path}" != "." ] ; do
		_dirname="$(dirname "${_path}" 2>/dev/null)"
		_basename="$(basename "${_path}" 2>/dev/null)"
		ls -fa "${DEST_DIR}${_dirname}" 2> /dev/null \
			| ${GREP} -F -x "${_basename}" >/dev/null \
			|| return 1
		_path="${_dirname}"
	done
	return 0
}

# obsolete_paths op
#	Obsolete the list of paths provided on stdin.
#	Each path should start with '/' or './', and
#	will be interpreted relative to ${DEST_DIR}.
#
obsolete_paths()
{
	[ -n "$1" ] || err 3 "USAGE: obsolete_paths  fix|check"
	op="$1"

	failed=0
	while read ofile; do
		if ! ${file_exists_exact} "${ofile}"; then
			continue
		fi
		ofile="${DEST_DIR}${ofile#.}"
		cmd="rm"
		ftype="file"
		if [ -h "${ofile}" ]; then
			ftype="link"
		elif [ -d "${ofile}" ]; then
			ftype="directory"
			cmd="rmdir"
		elif [ ! -e "${ofile}" ]; then
			continue
		fi
		if [ "${op}" = "check" ]; then
			msg "Remove obsolete ${ftype} ${ofile}"
			failed=1
		elif ! eval "${cmd} \"\${ofile}\""; then
			msg "Can't remove obsolete ${ftype} ${ofile}"
			failed=1
		else
			msg "Removed obsolete ${ftype} ${ofile}"
		fi
	done
	return ${failed}
}

# obsolete_libs dir
#	Display the minor/teeny shared libraries in dir that are considered
#	to be obsolete.
#
#	The implementation supports removing obsolete major libraries
#	if the awk variable AllLibs is set, although there is no way to
#	enable that in the enclosing shell function as this time.
#
obsolete_libs()
{
	[ $# -eq 1 ] || err 3 "USAGE: obsolete_libs dir"
	dir="$1"

	_obsolete_libs "${dir}"
	_obsolete_libs "/usr/libdata/debug/${dir}"
}

_obsolete_libs()
{
	dir="$1"

	(

	if [ ! -e "${DEST_DIR}/${dir}" ]
	then
		return 0
	fi

	cd "${DEST_DIR}/${dir}" || err 2 "can't cd to ${DEST_DIR}/${dir}"
	echo lib*.so.* \
	| tr ' ' '\n' \
	| ${AWK} -v LibDir="${dir}/" '
#{

function digit(v, c, n) { return (n <= c) ? v[n] : 0 }

function checklib(results, line, regex) {
	if (! match(line, regex))
		return
	lib = substr(line, RSTART, RLENGTH)
	rev = substr($0, RLENGTH+1)
	if (! (lib in results)) {
		results[lib] = rev
		return
	}
	orevc = split(results[lib], orev, ".")
	nrevc = split(rev, nrev, ".")
	maxc = (orevc > nrevc) ? orevc : nrevc
	for (i = 1; i <= maxc; i++) {
		res = digit(orev, orevc, i) - digit(nrev, nrevc, i)
		if (res < 0) {
			print LibDir lib results[lib]
			results[lib] = rev
			return
		} else if (res > 0) {
			print LibDir lib rev
			return
		}
	}
}

/^lib.*\.so\.[0-9]+\.[0-9]+(\.[0-9]+)?(\.debug)?$/ {
	if (AllLibs)
		checklib(minor, $0, "^lib.*\\.so\\.")
	else
		checklib(found, $0, "^lib.*\\.so\\.[0-9]+\\.")
}

/^lib.*\.so\.[0-9]+$/ {
	if (AllLibs)
		checklib(major, $0, "^lib.*\\.so\\.")
}

#}'

	)
}

# obsolete_stand dir
#	Prints the names of all obsolete files and subdirs below the
#	provided dir.  dir should be something like /stand/${MACHINE}.
#	The input dir and all output paths are interpreted
#	relative to ${DEST_DIR}.
#
#	Assumes that the numerically largest subdir is current, and all
#	others are obsolete.
#
obsolete_stand()
{
	[ $# -eq 1 ] || err 3 "USAGE: obsolete_stand dir"
	local dir="$1"
	local subdir

	if ! [ -d "${DEST_DIR}${dir}" ]; then
		msg "${DEST_DIR}${dir} doesn't exist; can't check for obsolete files"
		return 1
	fi

	( cd "${DEST_DIR}${dir}" && ls -1d [0-9]*[0-9]/. ) \
	| ${GREP} -v '[^0-9./]' \
	| sort -t. -r -n -k1,1 -k2,2 -k3,3 \
	| tail -n +2 \
	| while read subdir ; do
		subdir="${subdir%/.}"
		find "${DEST_DIR}${dir}/${subdir}" -depth -print
	done \
	| unprefix "${DEST_DIR}"
}

# modify_file op srcfile scratchfile awkprog
#	Apply awkprog to srcfile sending output to scratchfile, and
#	if appropriate replace srcfile with scratchfile.
#
modify_file()
{
	[ $# -eq 4 ] || err 3 "USAGE: modify_file op file scratch awkprog"

	_mfop="$1"
	_mffile="$2"
	_mfscratch="$3"
	_mfprog="$4"
	_mffailed=0

	${AWK} "${_mfprog}" < "${_mffile}" > "${_mfscratch}"
	if ! cmp -s "${_mffile}" "${_mfscratch}"; then
		diff "${_mffile}" "${_mfscratch}" > "${_mfscratch}.diffs"
		if [ "${_mfop}" = "check" ]; then
			msg "${_mffile} needs the following changes:"
			_mffailed=1
		elif ! rm -f "${_mffile}" ||
		     ! cp -f "${_mfscratch}" "${_mffile}"; then
			msg "${_mffile} changes not applied:"
			_mffailed=1
		else
			msg "${_mffile} changes applied:"
		fi
		while read _line; do
			msg "	${_line}"
		done < "${_mfscratch}.diffs"
	fi
	return ${_mffailed}
}


# contents_owner op directory user group
#	Make sure directory and contents are owned (and group-owned)
#	as specified.
#
contents_owner()
{
	[ $# -eq 4 ] || err 3 "USAGE: contents_owner op dir user group"

	_op="$1"
	_dir="$2"
	_user="$3"
	_grp="$4"

	if [ "${_op}" = "check" ]; then
		if [ ! -z "`find "${_dir}" \( ! -user "${_user}" \) -o \
		    \( ! -group "${_grp}" \)`" ]; then
			msg \
    "${_dir} and contents not all owned by ${_user}:${_grp}"
			return 1
		else
			return 0
		fi
	elif [ "${_op}" = "fix" ]; then
		find "${_dir}" \( \( ! -user "${_user}" \) -o \
		\( ! -group "${_grp}" \) \) -a -print0 \
		| xargs -0 chown "${_user}:${_grp}"
	fi
}

# get_makevar var [var ...]
#	Retrieve the value of a user-settable system make variable
get_makevar()
{
	$SOURCEMODE || err 3 "get_makevar must be used in source mode"
	[ $# -eq 0 ] && err 3 "USAGE: get_makevar var [var ...]"

	for _var in "$@"; do
		_value="$(echo '.include <bsd.own.mk>' | \
		    ${MAKE} -f - -V "\${${_var}}")"

		eval ${_var}=\"\${_value}\"
	done
}

# detect_x11
#	Detect if X11 components should be analysed and set values of
#	relevant variables.
detect_x11()
{
	if $SOURCEMODE; then
		get_makevar MKX11 X11ROOTDIR X11SRCDIR
	else
		if [ -f "${SRC_DIR}/etc/mtree/set.xetc" ]; then
			MKX11=yes
			X11ROOTDIR=/this/value/isnt/used/yet
		else
			MKX11=no
			X11ROOTDIR=
		fi
		X11SRCDIR=/nonexistent/xsrc
	fi
}

#
#	items
#	-----
#

#
#	Bluetooth
#

additem bluetooth "Bluetooth configuration is up to date"
do_bluetooth()
{
	[ -n "$1" ] || err 3 "USAGE: do_bluetooth fix|check"
	op="$1"
	failed=0

	populate_dir "${op}" true \
		"${SRC_DIR}/etc/bluetooth" "${DEST_DIR}/etc/bluetooth" 644 \
		hosts protocols btattach.conf btdevctl.conf
	failed=$(( ${failed} + $? ))

	move_file "${op}" "${DEST_DIR}/var/db/btdev.xml" \
			"${DEST_DIR}/var/db/btdevctl.plist"
	failed=$(( ${failed} + $? ))

	notfixed=""
	if [ "${op}" = "fix" ]; then
		notfixed="${NOT_FIXED}"
	fi
	for _v in btattach btconfig btdevctl; do
		if rcvar_is_enabled "${_v}"; then
			msg \
    "${_v} is obsolete in rc.conf(5)${notfixed}: use bluetooth=YES"
			failed=$(( ${failed} + 1 ))
		fi
	done

	return ${failed}
}

#
#	ddbonpanic
#
additem ddbonpanic "verify ddb.onpanic is configured in sysctl.conf"
do_ddbonpanic()
{
	[ -n "$1" ] || err 3 "USAGE: do_ddbonpanic  fix|check"

	if ${GREP} -E '^#*[[:space:]]*ddb\.onpanic[[:space:]]*\??=[[:space:]]*[[:digit:]]+' \
		"${DEST_DIR}/etc/sysctl.conf" >/dev/null 2>&1
	then
		result=0
	else
		if [ "$1" = check ]; then
			msg \
    "The ddb.onpanic behaviour is not explicitly specified in /etc/sysctl.conf"
			result=1
		else
			echo >> "${DEST_DIR}/etc/sysctl.conf"
			${SED} < "${SRC_DIR}/etc/sysctl.conf" \
			   -e '/^ddb\.onpanic/q' | \
			       ${SED} -e '1,/^$/d' >> \
			    "${DEST_DIR}/etc/sysctl.conf"
			result=$?
		fi
	fi
	return ${result}
}

#
#	defaults
#
additem defaults "/etc/defaults/ being up to date"
do_defaults()
{
	[ -n "$1" ] || err 3 "USAGE: do_defaults  fix|check"
	op="$1"
	failed=0

	# Except for i386 and amd64, rc.conf(5) should be the same as the
	# one obtained from a source directory
	extra_scripts="rc.conf"
	if [ "$MACHINE" = "i386" -o "$MACHINE" = "amd64" ]; then
		if $SOURCEMODE; then
			extra_scripts=	# clear

			# Generate and compare the correct rc.conf(5) file
			mkdir "${SCRATCHDIR}/defaults"

			cat "${SRC_DIR}/etc/defaults/rc.conf" \
			    "${SRC_DIR}/etc/etc.${MACHINE}/rc.conf.append" \
			    > "${SCRATCHDIR}/defaults/rc.conf"

			compare_dir "${op}" "${SCRATCHDIR}/defaults" \
			    "${DEST_DIR}/etc/defaults" \
			    444 \
			    "rc.conf"
			failed=$(( ${failed} + $? ))
		fi
	fi

	compare_dir "$op" "${SRC_DIR}/etc/defaults" "${DEST_DIR}/etc/defaults" \
		444 \
		daily.conf monthly.conf pkgpath.conf security.conf \
		weekly.conf ${extra_scripts}
	failed=$(( ${failed} + $? ))

	find_file_in_dirlist pf.boot.conf "pf.boot.conf" \
	    "${SRC_DIR}/usr.sbin/pf/etc/defaults" "${SRC_DIR}/etc/defaults" \
	    || return 1
			# ${dir} is set by find_file_in_dirlist()
	compare_dir "$op" "${dir}" "${DEST_DIR}/etc/defaults" 444 pf.boot.conf
	failed=$(( ${failed} + $? ))

	return ${failed}
}

#
#	dhcpcd
#
additem dhcpcd "dhcpcd configuration is up to date"
do_dhcpcd()
{
	[ -n "$1" ] || err 3 "USAGE: do_dhcpcd fix|check"
	op="$1"
	failed=0

	find_file_in_dirlist dhcpcd.conf "dhcpcd.conf" \
	    "${SRC_DIR}/external/bsd/dhcpcd/dist/src" \
	    "${SRC_DIR}/etc" || return 1
			# ${dir} is set by find_file_in_dirlist()
	populate_dir "$op" true "${dir}" "${DEST_DIR}/etc" 644 dhcpcd.conf
	failed=$(( ${failed} + $? ))

	check_dir "${op}" "${DEST_DIR}/var/db/dhcpcd" 755
	failed=$(( ${failed} + $? ))

	move_file "${op}" \
		"${DEST_DIR}/etc/dhcpcd.duid" \
		"${DEST_DIR}/var/db/dhcpcd/duid"
	failed=$(( ${failed} + $? ))

	move_file "${op}" \
		"${DEST_DIR}/etc/dhcpcd.secret" \
		"${DEST_DIR}/var/db/dhcpcd/secret"
	failed=$(( ${failed} + $? ))

	move_file "${op}" \
		"${DEST_DIR}/var/db/dhcpcd-rdm.monotonic" \
		"${DEST_DIR}/var/db/dhcpcd/rdm_monotonic"
	failed=$(( ${failed} + $? ))

	for lease in "${DEST_DIR}/var/db/dhcpcd-"*.lease*; do
		[ -f "${lease}" ] || continue
		new_lease=$(basename "${lease}" | ${SED} -e 's/dhcpcd-//')
		new_lease="${DEST_DIR}/var/db/dhcpcd/${new_lease}"
		move_file "${op}" "${lease}" "${new_lease}"
		failed=$(( ${failed} + $? ))
	done

	return ${failed}
}

#
#	dhcpcdrundir
#
additem dhcpcdrundir "accidentaly created /@RUNDIR@ does not exist"
do_dhcpcdrundir()
{
	[ -n "$1" ] || err 3 "USAGE: do_dhcpcdrundir fix|check"
	op="$1"
	failed=0

	if [ -d "${DEST_DIR}/@RUNDIR@" ]; then
		if [ "${op}" = "check" ]; then
			msg "Remove eroneously created /@RUNDIR@"
			failed=1
		elif ! rm -r "${DEST_DIR}/@RUNDIR@"; then
			msg "Failed to remove ${DEST_DIR}/@RUNDIR@"
			failed=1
		else
			msg "Removed eroneously created ${DEST_DIR}/@RUNDIR@"
		fi
	fi
	return ${failed}
}

#
#	envsys
#
additem envsys "envsys configuration is up to date"
do_envsys()
{
	[ -n "$1" ] || err 3 "USAGE: do_envsys fix|check"
	op="$1"
	failed=0

	populate_dir "$op" true "${SRC_DIR}/etc" "${DEST_DIR}/etc" 644 \
		envsys.conf
	failed=$(( ${failed} + $? ))

	populate_dir "$op" true "${SRC_DIR}/etc/powerd/scripts" \
		"${DEST_DIR}/etc/powerd/scripts" 555 sensor_battery \
		sensor_drive sensor_fan sensor_indicator sensor_power \
		sensor_resistance sensor_temperature sensor_voltage
	failed=$(( ${failed} + $? ))

	return ${failed}
}

#
#	X11 fontconfig
#
additem fontconfig "X11 font configuration is up to date"
do_fontconfig()
{
	[ -n "$1" ] || err 3 "USAGE: do_fontconfig fix|check"
	op="$1"
	failed=0

	# First, check for updates we can handle.
	if ! $SOURCEMODE; then
		FONTCONFIG_DIR="${SRC_DIR}/etc/fonts/conf.avail"
	else
		FONTCONFIG_DIR="${XSRC_DIR}/external/mit/fontconfig/dist/conf.d"
	fi

	if [ ! -d "${FONTCONFIG_DIR}" ]; then
		msg "${FONTCONFIG_DIR} is not a directory; skipping check"
		return 0
	fi

	populate_dir "$op" false "${FONTCONFIG_DIR}" "${DEST_DIR}/etc/fonts/conf.avail" 444 \
		10-autohint.conf \
		10-no-sub-pixel.conf \
		10-scale-bitmap-fonts.conf \
		10-sub-pixel-bgr.conf \
		10-sub-pixel-rgb.conf \
		10-sub-pixel-vbgr.conf \
		10-sub-pixel-vrgb.conf \
		10-unhinted.conf \
		11-lcdfilter-default.conf \
		11-lcdfilter-legacy.conf \
		11-lcdfilter-light.conf \
		20-unhint-small-vera.conf \
		25-unhint-nonlatin.conf \
		30-metric-aliases.conf \
		30-urw-aliases.conf \
		40-nonlatin.conf \
		45-latin.conf \
		49-sansserif.conf \
		50-user.conf \
		51-local.conf \
		60-latin.conf \
		65-fonts-persian.conf \
		65-khmer.conf \
		65-nonlatin.conf \
		69-unifont.conf \
		70-no-bitmaps.conf \
		70-yes-bitmaps.conf \
		80-delicious.conf \
		90-synthetic.conf
	failed=$(( ${failed} + $? ))

	if ! $SOURCEMODE; then
		FONTS_DIR="${SRC_DIR}/etc/fonts"
	else
		FONTS_DIR="${SRC_DIR}/external/mit/xorg/lib/fontconfig/etc"
	fi

	populate_dir "$op" false "${FONTS_DIR}" "${DEST_DIR}/etc/fonts" 444 \
		fonts.conf
	failed=$(( ${failed} + $? ))

	# We can't modify conf.d easily; someone might have removed a file.

	conf_d_failed=0
	# Look for old files that need to be deleted.
	if [ -f "${DEST_DIR}/etc/fonts/conf.d/10-unhinted.conf" -a \
	     -f "${DEST_DIR}/etc/fonts/conf.d/10-autohint.conf" ]; then
		conf_d_failed=1
		failed=$(( ${failed} + 1 ))
	fi

	if [ "$conf_d_failed" = 1 ]; then
		msg \
    "Broken fontconfig configuration found; please delete these files"
		msg \
    "in the ${DEST_DIR}/etc/fonts/conf.d/ subdirectory:"
		msg \
    "   10-autohint.conf 10-no-sub-pixel.conf 10-sub-pixel-bgr.conf"
		msg \
    "   10-sub-pixel-rgb.conf 10-sub-pixel-vbgr.conf"
		msg \
    "   10-sub-pixel-vrgb.conf 10-unhinted.conf 25-unhint-nonlatin.conf"
		msg \
    "   65-khmer.conf 70-no-bitmaps.conf 70-yes-bitmaps.conf"
		msg \
    "(This warning only appears if both the 10-unhinted.conf and"
		msg \
    "10-autohint.conf files are present."
	fi

	return ${failed}
}

#
#	gid
#
additem gid "required groups in /etc/group"
do_gid()
{
	[ -n "$1" ] || err 3 "USAGE: do_gid  fix|check"

	check_ids "$1" groups "${DEST_DIR}/etc/group" \
	    "${SRC_DIR}/etc/group" 14 \
	    named ntpd sshd SKIP _pflogd _rwhod staff _proxy _timedc \
	    _sdpd _httpd _mdnsd _tests _tcpdump _tss _gpio _rtadvd SKIP \
	    _unbound _nsd
}

#
#	gpio
#
additem gpio "gpio configuration is up to date"
do_gpio()
{
	[ -n "$1" ] || err 3 "USAGE: do_gpio fix|check"
	op="$1"
	failed=0

	populate_dir "$op" true "${SRC_DIR}/etc" "${DEST_DIR}/etc" 644 \
		gpio.conf
	failed=$(( ${failed} + $? ))

	return ${failed}
}

#
#	hosts
#
additem hosts "/etc/hosts being up to date"
do_hosts()
{
	[ -n "$1" ] || err 3 "USAGE: do_hosts  fix|check"

	modify_file "$1" "${DEST_DIR}/etc/hosts" "${SCRATCHDIR}/hosts" '
		/^(127\.0\.0\.1|::1)[ 	]+[^\.]*$/ {
			print $0, "localhost."
			next
		}
		{ print }
	'
	return $?
}

#
#	iscsi
#
additem iscsi "/etc/iscsi is populated"
do_iscsi()
{
	[ -n "$1" ] || err 3 "USAGE: do_iscsi  fix|check"

	populate_dir "${op}" true \
	    "${SRC_DIR}/etc/iscsi" "${DEST_DIR}/etc/iscsi" 600 auths
	populate_dir "${op}" true \
	    "${SRC_DIR}/etc/iscsi" "${DEST_DIR}/etc/iscsi" 644 targets
	return $?
}

#
#	makedev
#
additem makedev "/dev/MAKEDEV being up to date"
do_makedev()
{
	[ -n "$1" ] || err 3 "USAGE: do_makedev   fix|check"
	failed=0

	if [ -f "${SRC_DIR}/etc/MAKEDEV.tmpl" ]; then
			# generate MAKEDEV from source if source is available
		env MACHINE="${MACHINE}" \
		    MACHINE_ARCH="${MACHINE_ARCH}" \
		    NETBSDSRCDIR="${SRC_DIR}" \
		    ${AWK} -f "${SRC_DIR}/etc/MAKEDEV.awk" \
		    "${SRC_DIR}/etc/MAKEDEV.tmpl" > "${SCRATCHDIR}/MAKEDEV"
	fi

	find_file_in_dirlist MAKEDEV "MAKEDEV" \
	    "${SCRATCHDIR}" "${SRC_DIR}/dev" \
	    || return 1
			# ${dir} is set by find_file_in_dirlist()
	compare_dir "$1" "${dir}" "${DEST_DIR}/dev" 555 MAKEDEV
	failed=$(( ${failed} + $? ))

	find_file_in_dirlist MAKEDEV.local "MAKEDEV.local" \
	    "${SRC_DIR}/etc" "${SRC_DIR}/dev" \
	    || return 1
			# ${dir} is set by find_file_in_dirlist()
	compare_dir "$1" "${dir}" "${DEST_DIR}/dev" 555 MAKEDEV.local
	failed=$(( ${failed} + $? ))

	return ${failed}
}

#
#	motd
#
additem motd "contents of motd"
do_motd()
{
	[ -n "$1" ] || err 3 "USAGE: do_motd  fix|check"

	if ${GREP} -i 'http://www.NetBSD.org/Misc/send-pr.html' \
		"${DEST_DIR}/etc/motd" >/dev/null 2>&1 \
	    || ${GREP} -i 'http://www.NetBSD.org/support/send-pr.html' \
		"${DEST_DIR}/etc/motd" >/dev/null 2>&1
	then
		tmp1="$(mktemp /tmp/postinstall.motd.XXXXXXXX)"
		tmp2="$(mktemp /tmp/postinstall.motd.XXXXXXXX)"
		${SED} '1,2d' <"${SRC_DIR}/etc/motd" >"${tmp1}"
		${SED} '1,2d' <"${DEST_DIR}/etc/motd" >"${tmp2}"

		if [ "$1" = check ]; then
			cmp -s "${tmp1}" "${tmp2}"
			result=$?
			if [ "${result}" -ne 0 ]; then
				msg \
    "Bug reporting messages do not seem to match the installed release"
			fi
		else
			head -n 2 "${DEST_DIR}/etc/motd" >"${tmp1}"
			${SED} '1,2d' <"${SRC_DIR}/etc/motd" >>"${tmp1}"
			cp "${tmp1}" "${DEST_DIR}/etc/motd"
			result=0
		fi

		rm -f "${tmp1}" "${tmp2}"
	else
		result=0
	fi

	return ${result}
}

#
#	mtree
#
additem mtree "/etc/mtree/ being up to date"
do_mtree()
{
	[ -n "$1" ] || err 3 "USAGE: do_mtree  fix|check"
	failed=0

	compare_dir "$1" "${SRC_DIR}/etc/mtree" "${DEST_DIR}/etc/mtree" 444 special
	failed=$(( ${failed} + $? ))

	if ! $SOURCEMODE; then
		MTREE_DIR="${SRC_DIR}/etc/mtree"
	else
		/bin/rm -rf "${SCRATCHDIR}/obj"
		mkdir "${SCRATCHDIR}/obj"
		${MAKE} -s -C "${SRC_DIR}/etc/mtree" TOOL_AWK="${AWK}" \
		    MAKEOBJDIR="${SCRATCHDIR}/obj" emit_dist_file > \
		    "${SCRATCHDIR}/NetBSD.dist"
		MTREE_DIR="${SCRATCHDIR}"
		/bin/rm -rf "${SCRATCHDIR}/obj"
	fi
	compare_dir "$1" "${MTREE_DIR}" "${DEST_DIR}/etc/mtree" 444 NetBSD.dist
	failed=$(( ${failed} + $? ))

	return ${failed}
}

#
#	named
#
additem named "named configuration update"
do_named()
{
	[ -n "$1" ] || err 3 "USAGE: do_named  fix|check"
	op="$1"

	move_file "${op}" \
		"${DEST_DIR}/etc/namedb/named.conf" \
		"${DEST_DIR}/etc/named.conf"

	compare_dir "${op}" "${SRC_DIR}/etc/namedb" "${DEST_DIR}/etc/namedb" \
		644 \
		root.cache
}

#
#	pam
#
additem pam "/etc/pam.d is populated"
do_pam()
{
	[ -n "$1" ] || err 3 "USAGE: do_pam  fix|check"
	op="$1"
	failed=0

	populate_dir "${op}" true "${SRC_DIR}/etc/pam.d" \
		"${DEST_DIR}/etc/pam.d" 644 \
		README display_manager ftpd gdm imap kde login other passwd \
		pop3 ppp rexecd rsh sshd su system telnetd xdm xserver

	failed=$(( ${failed} + $? ))

	return ${failed}
}

#
#	periodic
#
additem periodic "/etc/{daily,weekly,monthly,security} being up to date"
do_periodic()
{
	[ -n "$1" ] || err 3 "USAGE: do_periodic  fix|check"

	compare_dir "$1" "${SRC_DIR}/etc" "${DEST_DIR}/etc" 644 \
		daily weekly monthly security
}

#
#	pf
#
additem pf "pf configuration being up to date"
do_pf()
{
	[ -n "$1" ] || err 3 "USAGE: do_pf  fix|check"
	op="$1"
	failed=0

	find_file_in_dirlist pf.os "pf.os" \
	    "${SRC_DIR}/dist/pf/etc" "${SRC_DIR}/etc" \
	    || return 1
			# ${dir} is set by find_file_in_dirlist()
	populate_dir "${op}" true \
	    "${dir}" "${DEST_DIR}/etc" 644 \
	    pf.conf
	failed=$(( ${failed} + $? ))

	compare_dir "${op}" "${dir}" "${DEST_DIR}/etc" 444 pf.os
	failed=$(( ${failed} + $? ))

	return ${failed}
}

#
#	pwd_mkdb
#
additem pwd_mkdb "passwd database version"
do_pwd_mkdb()
{
	[ -n "$1" ] || err 3 "USAGE: do_pwd_mkdb  fix|check"
	op="$1"
	failed=0

	# XXX Ideally, we should figure out the endianness of the
	# target machine, and add "-E B"/"-E L" to the db(1) flags,
	# and "-B"/"-L" to the pwd_mkdb(8) flags if the target is not
	# the same as the host machine.  It probably doesn't matter,
	# because we don't expect "postinstall fix pwd_mkdb" to be
	# invoked during a cross build.

	set -- $(${DB} -q -Sb -Ub -To -N hash "${DEST_DIR}/etc/pwd.db" \
		'VERSION\0')
	case "$2" in
	'\001\000\000\000') return 0 ;; # version 1, little-endian
	'\000\000\000\001') return 0 ;; # version 1, big-endian
	esac

	if [ "${op}" = "check" ]; then
		msg "Update format of passwd database"
		failed=1
	elif ! ${PWD_MKDB} -V 1 -d "${DEST_DIR:-/}" \
			"${DEST_DIR}/etc/master.passwd";
	then
		msg "Can't update format of passwd database"
		failed=1
	else
		msg "Updated format of passwd database"
	fi

	return ${failed}
}

#
#	rc
#

# XXX Generate these from ../../distrib/sets/lists
rc_644_files="
rc
rc.subr
rc.shutdown
"
rc_555_files="
DAEMON
DISKS
LOGIN
NETWORKING
SERVERS
accounting
altqd
amd
apmd
bluetooth
bootconf.sh
bootparams
ccd
cgd
cleartmp
cron
devpubd
dhclient
dhcpcd
dhcpd
dhcrelay
dmesg
downinterfaces
envsys
fsck
fsck_root
ftp_proxy
ftpd
gpio
hostapd
httpd
identd
ifwatchd
inetd
ip6addrctl
ipfilter
ipfs
ipmon
ipnat
ipsec
irdaattach
iscsi_target
iscsid
isdnd
isibootd
kdc
ldconfig
ldpd
local
lpd
lvm
makemandb
mdnsd
mixerctl
modules
mopd
motd
mountall
mountcritlocal
mountcritremote
mountd
moused
mrouted
named
ndbootd
network
newsyslog
nfsd
nfslocking
npf
npfd
ntpd
ntpdate
perusertmp
pf
pf_boot
pflogd
postfix
powerd
ppp
pwcheck
quota
racoon
raidframe
raidframeparity
random_seed
rarpd
rbootd
resize_root
rndctl
root
route6d
routed
rpcbind
rtadvd
rtclocaltime
rwho
savecore
screenblank
securelevel
smtoff
sshd
staticroute
swap1
swap2
sysctl
sysdb
syslogd
timed
tpctl
ttys
veriexec
virecover
wdogctl
wpa_supplicant
wscons
wsmoused
ypbind
yppasswdd
ypserv
"
rc_obsolete_files="
NETWORK
btattach
btconfig
btcontrol
btdevctl
bthcid
btuartd
daemon
fsck.sh
gated
kerberos
login
nfsiod
poffd
portmap
rtsold
sdpd
servers
sunndd
systemfs
xntpd
"
rc_obsolete_vars="
amd amd_master
btcontrol btcontrol_devices
critical_filesystems critical_filesystems_beforenet
mountcritlocal mountcritremote
network ip6forwarding
network nfsiod_flags
sdpd sdpd_control
sdpd sdpd_groupname
sdpd sdpd_username
sysctl defcorename
"

update_rc()
{
	local op=$1
	local dir=$2
	local name=$3
	local bindir=$4
	local rcdir=$5

	if [ ! -x "${DEST_DIR}/${bindir}/${name}" ]; then
		return 0
	fi

	if ! find_file_in_dirlist "${name}" "${name}" \
	    "${rcdir}" "${SRC_DIR}/etc/rc.d"; then
		return 1
	fi
	populate_dir "${op}" false "${dir}" "${DEST_DIR}/etc/rc.d" 555 "${name}"
	return $?
}

additem rc "/etc/rc* and /etc/rc.d/ being up to date"
do_rc()
{
	[ -n "$1" ] || err 3 "USAGE: do_rc  fix|check"
	op="$1"
	failed=0
	generated_scripts=""
	if [ "${MKX11}" != "no" ]; then
		generated_scripts="${generated_scripts} xdm xfs"
	fi

	compare_dir "${op}" "${SRC_DIR}/etc" "${DEST_DIR}/etc" 644 \
		${rc_644_files}
	failed=$(( ${failed} + $? ))

	if ! $SOURCEMODE; then
		extra_scripts="${generated_scripts}"
	else
		extra_scripts=""
	fi

	compare_dir "${op}" "${SRC_DIR}/etc/rc.d" "${DEST_DIR}/etc/rc.d" 555 \
		${rc_555_files} \
		${extra_scripts}
	failed=$(( ${failed} + $? ))

	update_rc "${op}" "${dir}" blacklistd /sbin \
	    "${SRC_DIR}/external/bsd/blacklist/etc/rc.d"
	failed=$(( ${failed} + $? ))

	update_rc "${op}" "${dir}" unbound /usr/sbin \
	    "${SRC_DIR}/external/bsd/unbound/etc/rc.d"
	failed=$(( ${failed} + $? ))

	update_rc "${op}" "${dir}" nsd /usr/sbin \
	    "${SRC_DIR}/external/bsd/nsd/etc/rc.d"
	failed=$(( ${failed} + $? ))

	if $SOURCEMODE && [ -n "${generated_scripts}" ]; then
		# generate scripts
		mkdir "${SCRATCHDIR}/rc"
		for f in ${generated_scripts}; do
			${SED} -e "s,@X11ROOTDIR@,${X11ROOTDIR},g" \
			    < "${SRC_DIR}/etc/rc.d/${f}.in" \
			    > "${SCRATCHDIR}/rc/${f}"
		done
		compare_dir "${op}" "${SCRATCHDIR}/rc" \
		    "${DEST_DIR}/etc/rc.d" 555 \
		    ${generated_scripts}
		failed=$(( ${failed} + $? ))
	fi

		# check for obsolete rc.d files
	for f in ${rc_obsolete_files}; do
		fd="/etc/rc.d/${f}"
		[ -e "${DEST_DIR}${fd}" ] && echo "${fd}"
	done | obsolete_paths "${op}"
	failed=$(( ${failed} + $? ))

		# check for obsolete rc.conf(5) variables
	set -- ${rc_obsolete_vars}
	while [ $# -gt 1 ]; do
		if rcconf_is_set "${op}" "$1" "$2" 1; then
			failed=1
		fi
		shift 2
	done

	return ${failed}
}

#
#	sendmail
#
adddisableditem sendmail "remove obsolete sendmail configuration files and scripts"
do_sendmail()
{
	[ -n "$1" ] || err 3 "USAGE: do_sendmail  fix|check"
	op="$1"
	failed=0

	# Don't complain if the "sendmail" package is installed because the
	# files might still be in use.
	if /usr/sbin/pkg_info -qe sendmail >/dev/null 2>&1; then
		return 0
	fi

	for f in /etc/mail/helpfile /etc/mail/local-host-names \
	    /etc/mail/sendmail.cf /etc/mail/submit.cf /etc/rc.d/sendmail \
	    /etc/rc.d/smmsp /usr/share/misc/sendmail.hf \
	    $( ( find "${DEST_DIR}/usr/share/sendmail" -type f ; \
	         find "${DEST_DIR}/usr/share/sendmail" -type d \
	       ) | unprefix "${DEST_DIR}" ) \
	    /var/log/sendmail.st \
	    /var/spool/clientmqueue \
	    /var/spool/mqueue
	do
		[ -e "${DEST_DIR}${f}" ] && echo "${f}"
	done | obsolete_paths "${op}"
	failed=$(( ${failed} + $? ))

	return ${failed}
}

#
#	mailerconf
#
adddisableditem mailerconf "update /etc/mailer.conf after sendmail removal"
do_mailerconf()
{
	[ -n "$1" ] || err 3 "USAGE: do_mailterconf  fix|check"
	op="$1"

	failed=0
	mta_path="$(${AWK} '/^sendmail[ \t]/{print$2}' \
		"${DEST_DIR}/etc/mailer.conf")"
	old_sendmail_path="/usr/libexec/sendmail/sendmail"
	if [ "${mta_path}" = "${old_sendmail_path}" ]; then
	    if [ "$op" = check ]; then
		msg "mailer.conf points to obsolete ${old_sendmail_path}"
		failed=1;
	    else
		populate_dir "${op}" false \
		"${SRC_DIR}/etc" "${DEST_DIR}/etc" 644 mailer.conf
		failed=$?
	    fi
	fi

	return ${failed}
}

#
#	ssh
#
additem ssh "ssh configuration update"
do_ssh()
{
	[ -n "$1" ] || err 3 "USAGE: do_ssh  fix|check"
	op="$1"

	failed=0
	_etcssh="${DEST_DIR}/etc/ssh"
	if ! check_dir "${op}" "${_etcssh}" 755; then
		failed=1
	fi

	if [ ${failed} -eq 0 ]; then
		for f in \
			    ssh_known_hosts ssh_known_hosts2 \
			    ssh_host_dsa_key ssh_host_dsa_key.pub \
			    ssh_host_rsa_key ssh_host_rsa_key.pub \
			    ssh_host_key ssh_host_key.pub \
		    ; do
			if ! move_file "${op}" \
			    "${DEST_DIR}/etc/${f}" "${_etcssh}/${f}" ; then
				failed=1
			fi
		done
		for f in sshd.conf ssh.conf ; do
				# /etc/ssh/ssh{,d}.conf -> ssh{,d}_config
				#
			if ! move_file "${op}" \
			    "${_etcssh}/${f}" "${_etcssh}/${f%.conf}_config" ;
			then
				failed=1
			fi
				# /etc/ssh{,d}.conf -> /etc/ssh/ssh{,d}_config
				#
			if ! move_file "${op}" \
			    "${DEST_DIR}/etc/${f}" \
			    "${_etcssh}/${f%.conf}_config" ;
			then
				failed=1
			fi
		done
	fi

	sshdconf=""
	for f in \
	    "${_etcssh}/sshd_config" \
	    "${_etcssh}/sshd.conf" \
	    "${DEST_DIR}/etc/sshd.conf" ; do
		if [ -f "${f}" ]; then
			sshdconf="${f}"
			break
		fi
	done
	if [ -n "${sshdconf}" ]; then
		modify_file "${op}" "${sshdconf}" "${SCRATCHDIR}/sshdconf" '
			/^[^#$]/ {
				kw = tolower($1)
				if (kw == "hostkey" &&
				    $2 ~ /^\/etc\/+ssh_host(_[dr]sa)?_key$/ ) {
					sub(/\/etc\/+/, "/etc/ssh/")
				}
				if (kw == "rhostsauthentication" ||
				    kw == "verifyreversemapping" ||
				    kw == "reversemappingcheck") {
					sub(/^/, "# DEPRECATED:\t")
				}
			}
			{ print }
		'
		failed=$(( ${failed} + $? ))
	fi

	if ! find_file_in_dirlist moduli "moduli" \
	    "${SRC_DIR}/crypto/external/bsd/openssh/dist" "${SRC_DIR}/etc" ; then
		failed=1
			# ${dir} is set by find_file_in_dirlist()
	elif ! compare_dir "${op}" "${dir}" "${DEST_DIR}/etc" 444 moduli; then
		failed=1
	fi

	if ! check_dir "${op}" "${DEST_DIR}/var/chroot/sshd" 755 ; then
		failed=1
	fi

	if rcconf_is_set "${op}" sshd sshd_conf_dir 1; then
		failed=1
	fi

	return ${failed}
}

#
#	wscons
#
additem wscons "wscons configuration file update"
do_wscons()
{
	[ -n "$1" ] || err 3 "USAGE: do_wscons  fix|check"
	op="$1"

	[ -f "${DEST_DIR}/etc/wscons.conf" ] || return 0

	failed=0
	notfixed=""
	if [ "${op}" = "fix" ]; then
		notfixed="${NOT_FIXED}"
	fi
	while read _type _arg1 _rest; do
		if [ "${_type}" = "mux" -a "${_arg1}" = "1" ]; then
			msg \
    "Obsolete wscons.conf(5) entry \""${_type} ${_arg1}"\" found.${notfixed}"
			failed=1
		fi
	done < "${DEST_DIR}/etc/wscons.conf"

	return ${failed}
}

#
#	X11
#
additem x11 "x11 configuration update"
do_x11()
{
	[ -n "$1" ] || err 3 "USAGE: do_x11  fix|check"
	op="$1"

	failed=0
	_etcx11="${DEST_DIR}/etc/X11"
	if [ ! -d "${_etcx11}" ]; then
		msg "${_etcx11} is not a directory; skipping check"
		return 0
	fi
	if [ -d "${DEST_DIR}/usr/X11R6/." ]
	then
		_libx11="${DEST_DIR}/usr/X11R6/lib/X11"
		if [ ! -d "${_libx11}" ]; then
			msg "${_libx11} is not a directory; skipping check"
			return 0
		fi
	fi

	_notfixed=""
	if [ "${op}" = "fix" ]; then
		_notfixed="${NOT_FIXED}"
	fi

	for d in \
		    fs lbxproxy proxymngr rstart twm xdm xinit xserver xsm \
	    ; do
		sd="${_libx11}/${d}"
		ld="/etc/X11/${d}"
		td="${DEST_DIR}${ld}"
		if [ -h "${sd}" ]; then
			continue
		elif [ -d "${sd}" ]; then
			tdfiles="$(find "${td}" \! -type d)"
			if [ -n "${tdfiles}" ]; then
				msg "${sd} exists yet ${td} already" \
				    "contains files${_notfixed}"
			else
				msg "Migrate ${sd} to ${td}${_notfixed}"
			fi
			failed=1
		elif [ -e "${sd}" ]; then
			msg "Unexpected file ${sd}${_notfixed}"
			continue
		else
			continue
		fi
	done

	return ${failed}
}

#
#	xkb
#
# /usr/X11R7/lib/X11/xkb/symbols/pc used to be a directory, but changed
# to a file on 2009-06-12.  Fixing this requires removing the directory
# (which we can do) and re-extracting the xbase set (which we can't do),
# or at least adding that one file (which we may be able to do if X11SRCDIR
# is available).
#
additem xkb "clean up for xkbdata to xkeyboard-config upgrade"
do_xkb()
{
	[ -n "$1" ] || err 3 "USAGE: do_xkb  fix|check"
	op="$1"
	failed=0

	pcpath="/usr/X11R7/lib/X11/xkb/symbols/pc"
	pcsrcdir="${X11SRCDIR}/external/mit/xkeyboard-config/dist/symbols"

	filemsg="\
${pcpath} was a directory, should be a file.
    To fix, extract the xbase set again."

	_notfixed=""
	if [ "${op}" = "fix" ]; then
		_notfixed="${NOT_FIXED}"
	fi

	if [ ! -d "${DEST_DIR}${pcpath}" ]; then
		return 0
	fi

	# Delete obsolete files in the directory, and the directory
	# itself.  If the directory contains unexpected extra files
	# then it will not be deleted.
	( [ -f "${DEST_DIR}"/var/db/obsolete/xbase ] \
	    &&  ${SORT} -ru "${DEST_DIR}"/var/db/obsolete/xbase \
	    | ${GREP} -E "^\\.?${pcpath}/" ;
	    echo "${pcpath}" ) \
	| obsolete_paths "${op}"
	failed=$(( ${failed} + $? ))

	# If the directory was removed above, then try to replace it with
	# a file.
	if [ -d "${DEST_DIR}${pcpath}" ]; then
		msg "${filemsg}${_notfixed}"
		failed=$(( ${failed} + 1 ))
	else
		if ! find_file_in_dirlist pc "${pcpath}" \
			"${pcsrcdir}" "${SRC_DIR}${pcpath%/*}"
		then
			msg "${filemsg}${_notfixed}"
			failed=$(( ${failed} + 1 ))
		else
			# ${dir} is set by find_file_in_dirlist()
			populate_dir "${op}" true \
				"${dir}" "${DEST_DIR}${pcpath%/*}" 444 \
				pc
			failed=$(( ${failed} + $? ))
		fi
	fi

	return $failed
}

#
#	uid
#
additem uid "required users in /etc/master.passwd"
do_uid()
{
	[ -n "$1" ] || err 3 "USAGE: do_uid  fix|check"

	check_ids "$1" users "${DEST_DIR}/etc/master.passwd" \
	    "${SRC_DIR}/etc/master.passwd" 12 \
	    postfix SKIP named ntpd sshd SKIP _pflogd _rwhod SKIP _proxy \
	    _timedc _sdpd _httpd _mdnsd _tests _tcpdump _tss SKIP _rtadvd \
	    SKIP _unbound _nsd
}


#
#	varrwho
#
additem varrwho "required ownership of files in /var/rwho"
do_varrwho()
{
	[ -n "$1" ] || err 3 "USAGE: do_varrwho  fix|check"

	contents_owner "$1" "${DEST_DIR}/var/rwho" _rwhod _rwhod
}


#
#	tcpdumpchroot
#
additem tcpdumpchroot "remove /var/chroot/tcpdump/etc/protocols"
do_tcpdumpchroot()
{
	[ -n "$1" ] || err 3 "USAGE: do_tcpdumpchroot  fix|check"

	failed=0;
	if [ -r "${DEST_DIR}/var/chroot/tcpdump/etc/protocols" ]; then
		if [ "$1" = "fix" ]; then
			rm "${DEST_DIR}/var/chroot/tcpdump/etc/protocols"
			failed=$(( ${failed} + $? ))
			rmdir "${DEST_DIR}/var/chroot/tcpdump/etc"
			failed=$(( ${failed} + $? ))
		else
			failed=1
		fi
	fi
	return ${failed}
}


#
#	atf
#
additem atf "install missing atf configuration files and validate them"
do_atf()
{
	[ -n "$1" ] || err 3 "USAGE: do_atf  fix|check"
	op="$1"
	failed=0

	# Ensure atf configuration files are in place.
	if find_file_in_dirlist NetBSD.conf "NetBSD.conf" \
	    "${SRC_DIR}/external/bsd/atf/etc/atf" \
	    "${SRC_DIR}/etc/atf"; then
			# ${dir} is set by find_file_in_dirlist()
		populate_dir "${op}" true "${dir}" "${DEST_DIR}/etc/atf" 644 \
		    NetBSD.conf common.conf || failed=1
	else
		failed=1
	fi
	if find_file_in_dirlist atf-run.hooks "atf-run.hooks" \
	    "${SRC_DIR}/external/bsd/atf/dist/tools/sample" \
	    "${SRC_DIR}/etc/atf"; then
			# ${dir} is set by find_file_in_dirlist()
		populate_dir "${op}" true "${dir}" "${DEST_DIR}/etc/atf" 644 \
		    atf-run.hooks || failed=1
	else
		failed=1
	fi

	# Validate the _atf to _tests user/group renaming.
	if [ -f "${DEST_DIR}/etc/atf/common.conf" ]; then
		handle_atf_user "${op}" || failed=1
	else
		failed=1
	fi

	return ${failed}
}

handle_atf_user()
{
	local op="$1"
	local failed=0

	local conf="${DEST_DIR}/etc/atf/common.conf"
	if grep '[^#]*unprivileged-user[ \t]*=.*_atf' "${conf}" >/dev/null
	then
		if [ "$1" = "fix" ]; then
			${SED} -e \
			    "/[^#]*unprivileged-user[\ t]*=/s/_atf/_tests/" \
			    "${conf}" >"${conf}.new"
			failed=$(( ${failed} + $? ))
			mv "${conf}.new" "${conf}"
			failed=$(( ${failed} + $? ))
			msg "Set unprivileged-user=_tests in ${conf}"
		else
			msg "unprivileged-user=_atf in ${conf} should be" \
			    "unprivileged-user=_tests"
			failed=1
		fi
	fi

	return ${failed}
}

#
#	catpages
#
obsolete_catpages()
{
	basedir="$2"
	section="$3"
	mandir="${basedir}/man${section}"
	catdir="${basedir}/cat${section}"
	test -d "$mandir" || return 0
	test -d "$catdir" || return 0
	(cd "$mandir" && find . -type f) | {
	failed=0
	while read manpage; do
		manpage="${manpage#./}"
		case "$manpage" in
		*.Z)
			catname="$catdir/${manpage%.*.Z}.0"
			;;
		*.gz)
			catname="$catdir/${manpage%.*.gz}.0"
			;;
		*)
			catname="$catdir/${manpage%.*}.0"
			;;
		esac
		test -e "$catname" -a "$catname" -ot "$mandir/$manpage" || continue
		if [ "$1" = "fix" ]; then
			rm "$catname"
			failed=$(( ${failed} + $? ))
			msg "Removed obsolete cat page $catname"
		else
			msg "Obsolete cat page $catname"
			failed=1
		fi
	done
	exit $failed
	}
}

additem catpages "remove outdated cat pages"
do_catpages()
{
	failed=0
	for manbase in /usr/share/man /usr/X11R6/man /usr/X11R7/man; do
		for sec in 1 2 3 4 5 6 7 8 9; do
			obsolete_catpages "$1" "${DEST_DIR}${manbase}" "${sec}"
			failed=$(( ${failed} + $? ))
			if [ "$1" = "fix" ]; then
				rmdir "${DEST_DIR}${manbase}/cat${sec}"/* \
					2>/dev/null
				rmdir "${DEST_DIR}${manbase}/cat${sec}" \
					2>/dev/null
			fi
		done
	done
	return $failed
}

#
#	man.conf
#
additem manconf "check for a mandoc usage in /etc/man.conf"
do_manconf()
{
	[ -n "$1" ] || err 3 "USAGE: do_manconf  fix|check"
	op="$1"
	failed=0

	[ -f "${DEST_DIR}/etc/man.conf" ] || return 0
	if ${GREP} -w "mandoc" "${DEST_DIR}/etc/man.conf" >/dev/null 2>&1;
	then
		failed=0;
	else
		failed=1
		notfixed=""
		if [ "${op}" = "fix" ]; then
			notfixed="${NOT_FIXED}"
		fi
		msg "The file /etc/man.conf has not been adapted to mandoc usage; you"
		msg "probably want to copy a new version over. ${notfixed}"
	fi

	return ${failed}
}


#
#	ptyfsoldnodes
#
additem ptyfsoldnodes "remove legacy device nodes when using ptyfs"
do_ptyfsoldnodes()
{
	[ -n "$1" ] || err 3 "USAGE: do_ptyfsoldnodes  fix|check"
	_ptyfs_op="$1"

	# Check whether ptyfs is in use
	failed=0;
	if ! ${GREP} -E "^ptyfs" "${DEST_DIR}/etc/fstab" > /dev/null; then
		msg "ptyfs is not in use"
		return 0
	fi

	if [ ! -e "${DEST_DIR}/dev/pts" ]; then
		msg "ptyfs is not properly configured: missing /dev/pts"
		return 1
	fi

	# Find the device major numbers for the pty master and slave
	# devices, by parsing the output from "MAKEDEV -s pty0".
	#
	# Output from MAKEDEV looks like this:
	# ./ttyp0 type=char device=netbsd,5,0 mode=666 gid=0 uid=0
	# ./ptyp0 type=char device=netbsd,6,0 mode=666 gid=0 uid=0
	#
	# Output from awk, used in the eval statement, looks like this:
	# maj_ptym=6; maj_ptys=5;
	#
	eval "$(
	    ${HOST_SH} "${DEST_DIR}/dev/MAKEDEV" -s pty0 2>/dev/null \
	    | ${AWK} '\
	    BEGIN { before_re = ".*device=[a-zA-Z]*,"; after_re = ",.*"; }
	    /ptyp0/ { maj_ptym = gensub(before_re, "", 1, $0);
		      maj_ptym = gensub(after_re, "", 1, maj_ptym); }
	    /ttyp0/ { maj_ptys = gensub(before_re, "", 1, $0);
		      maj_ptys = gensub(after_re, "", 1, maj_ptys); }
	    END { print "maj_ptym=" maj_ptym "; maj_ptys=" maj_ptys ";"; }
	    '
	    )"
	#msg "Major numbers are maj_ptym=${maj_ptym} maj_ptys=${maj_ptys}"
	if [ -z "$maj_ptym" ] || [ -z "$maj_ptys" ]; then
		msg "Cannot find device major numbers for pty master and slave"
		return 1
	fi

	# look for /dev/[pt]ty[p-zP-T][0-9a-zA-Z], and check that they
	# have the expected device major numbers.  ttyv* is typically not a
	# pty device, but we check it anyway.
	#
	# The "for d1" loop is intended to avoid overflowing ARG_MAX;
	# otherwise we could have used a single glob pattern.
	#
	# If there are no files that match a particular pattern,
	# then stat prints something like:
	#    stat: /dev/[pt]tyx?: lstat: No such file or directory
	# and we ignore it.  XXX: We also ignore other error messages.
	#
	_ptyfs_tmp="$(mktemp /tmp/postinstall.ptyfs.XXXXXXXX)"
	for d1 in p q r s t u v w x y z P Q R S T; do
		${STAT} -f "%Hr %N" "${DEST_DIR}/dev/"[pt]ty${d1}? 2>&1
	done \
	| while read -r major node ; do
		case "$major" in
		${maj_ptym}|${maj_ptys}) echo "$node" ;;
		esac
	done >"${_ptyfs_tmp}"

	_desc="legacy device node"
	while read node; do
		if [ "${_ptyfs_op}" = "check" ]; then
			msg "Remove ${_desc} ${node}"
			failed=1
		else # "fix"
			if rm "${node}"; then
				msg "Removed ${_desc} ${node}"
			else
				warn "Failed to remove ${_desc} ${node}"
				failed=1
			fi
		fi
	done < "${_ptyfs_tmp}"
	rm "${_ptyfs_tmp}"

	return ${failed}
}


#
#	varshm
#
additem varshm "check for a tmpfs mounted on /var/shm"
do_varshm()
{
	[ -n "$1" ] || err 3 "USAGE: do_varshm  fix|check"
	op="$1"
	failed=0

	[ -f "${DEST_DIR}/etc/fstab" ] || return 0
	if ${GREP} -w "/var/shm" "${DEST_DIR}/etc/fstab" >/dev/null 2>&1;
	then
		failed=0;
	else
		if [ "${op}" = "check" ]; then
			failed=1
			msg "No /var/shm mount found in ${DEST_DIR}/etc/fstab"
		elif [ "${op}" = "fix" ]; then
			printf '\ntmpfs\t/var/shm\ttmpfs\trw,-m1777,-sram%%25\n' \
				>> "${DEST_DIR}/etc/fstab"
			msg "Added tmpfs with 25% ram limit as /var/shm"

		fi
	fi

	return ${failed}
}

#
#	obsolete_stand
#
adddisableditem obsolete_stand "remove obsolete files from /stand"
do_obsolete_stand()
{
	[ -n "$1" ] || err 3 "USAGE: do_obsolete_stnd  fix|check"
	op="$1"
	failed=0

	for dir in \
	    /stand/${MACHINE} \
	    /stand/${MACHINE}-4xx \
	    /stand/${MACHINE}-booke \
	    /stand/${MACHINE}-xen \
	    /stand/${MACHINE}pae-xen
	do
		[ -d "${DESTDIR}${dir}" ] && obsolete_stand "${dir}"
	done | obsolete_paths "${op}"
	failed=$(( ${failed} + $? ))

	return ${failed}
}

#
#	obsolete
#	(this item is last to allow other items to move obsolete files)
#
additem obsolete "remove obsolete file sets and minor libraries"
do_obsolete()
{
	[ -n "$1" ] || err 3 "USAGE: do_obsolete  fix|check"
	op="$1"
	failed=0

	${SORT} -ru "${DEST_DIR}"/var/db/obsolete/* | obsolete_paths "${op}"
	failed=$(( ${failed} + $? ))

	(
		obsolete_libs /lib
		obsolete_libs /usr/lib
		obsolete_libs /usr/lib/i18n
		obsolete_libs /usr/X11R6/lib
		obsolete_libs /usr/X11R7/lib
		[ "$MACHINE" = "amd64" ] && obsolete_libs /usr/lib/i386
		[ "$MACHINE" = "sparc64" ] && obsolete_libs /usr/lib/sparc
	) | obsolete_paths "${op}"
	failed=$(( ${failed} + $? ))

	return ${failed}
}

#
#	end of items
#	------------
#


usage()
{
	cat 1>&2 << _USAGE_
Usage: ${PROGNAME} [-s srcdir] [-x xsrcdir] [-d destdir] [-m mach] [-a arch] op [item [...]]
	Perform post-installation checks and/or fixes on a system's
	configuration files.
	If no items are provided, a default set of checks or fixes is applied.

	Options:
	-s {srcdir|tgzfile|tempdir}
			Location of the source files.  This may be any
			of the following:
			* A directory that contains a NetBSD source tree;
			* A distribution set file such as "etc.tgz" or
			  "xetc.tgz".  Pass multiple -s options to specify
			  multiple such files;
			* A temporary directory in which one or both of
			  "etc.tgz" and "xetc.tgz" have been extracted.
							[${SRC_DIR:-/usr/src}]
	-x xsrcdir      Location of the X11 source files.  This must be
			a directory that contains a NetBSD xsrc tree.
							[${XSRC_DIR:-/usr/src/../xsrc}]
	-d destdir	Destination directory to check. [${DEST_DIR:-/}]
	-m mach		MACHINE.			[${MACHINE}]
	-a arch		MACHINE_ARCH.			[${MACHINE_ARCH}]

	Operation may be one of:
		help	Display this help.
		list	List available items.
		check	Perform post-installation checks on items.
		diff [diff(1) options ...]
			Similar to 'check' but also output difference of files.
		fix	Apply fixes that 'check' determines need to be applied.
		usage	Display this usage.
_USAGE_
	exit 2
}


list()
{
	echo "Default set of items (to apply if no items are provided by user):"
	echo "  Item          Description"
	echo "  ----          -----------"
	for i in ${defaultitems}; do
		eval desc=\"\${desc_${i}}\"
		printf "  %-12s  %s\n" "${i}" "${desc}"
	done
	echo "Items disabled by default (must be requested explicitly):"
	echo "  Item          Description"
	echo "  ----          -----------"
	for i in ${otheritems}; do
		eval desc=\"\${desc_${i}}\"
		printf "  %-12s  %s\n" "${i}" "${desc}"
	done

}


main()
{
	TGZLIST=		# quoted list list of tgz files
	SRC_ARGLIST=		# quoted list of one or more "-s" args
	SRC_DIR="${SRC_ARG}"	# set default value for early usage()
	XSRC_DIR="${SRC_ARG}/../xsrc"
	N_SRC_ARGS=0		# number of "-s" args
	TGZMODE=false		# true if "-s" specifies a tgz file
	DIRMODE=false		# true if "-s" specified a directory
	SOURCEMODE=false	# true if "-s" specified a source directory

	case "$(uname -s)" in
	Darwin)
		# case sensitive match for case insensitive fs
		file_exists_exact=file_exists_exact
		;;
	*)
		file_exists_exact=:
		;;
	esac

	while getopts s:x:d:m:a: ch; do
		case "${ch}" in
		s)
			qarg="$(shell_quote "${OPTARG}")"
			N_SRC_ARGS=$(( $N_SRC_ARGS + 1 ))
			SRC_ARGLIST="${SRC_ARGLIST}${SRC_ARGLIST:+ }-s ${qarg}"
			if [ -f "${OPTARG}" ]; then
				# arg refers to a *.tgz file.
				# This may happen twice, for both
				# etc.tgz and xetc.tgz, so we build up a
				# quoted list in TGZLIST.
				TGZMODE=true
				TGZLIST="${TGZLIST}${TGZLIST:+ }${qarg}"
				# Note that, when TGZMODE is true,
				# SRC_ARG is used only for printing
				# human-readable messages.
				SRC_ARG="${TGZLIST}"
			elif [ -d "${OPTARG}" ]; then
				# arg refers to a directory.
				# It might be a source directory, or a
				# directory where the sets have already
				# been extracted.
				DIRMODE=true
				SRC_ARG="${OPTARG}"
				if [ -f "${OPTARG}/etc/Makefile" ]; then
					SOURCEMODE=true
				fi
			else
				err 2 "Invalid argument for -s option"
			fi
			;;
		x)
			if [ -d "${OPTARG}" ]; then
				# arg refers to a directory.
				XSRC_DIR="${OPTARG}"
				XSRC_DIR_FIX="-x ${OPTARG} "
			else
				err 2 "Not a directory for -x option"
			fi
			;;
		d)
			DEST_DIR="${OPTARG}"
			;;
		m)
			MACHINE="${OPTARG}"
			;;
		a)
			MACHINE_ARCH="${OPTARG}"
			;;
		*)
			usage
			;;
		esac
	done
	shift $((${OPTIND} - 1))
	[ $# -gt 0 ] || usage

	if [ "$N_SRC_ARGS" -gt 1 ] && $DIRMODE; then
		err 2 "Multiple -s args are allowed only with tgz files"
	fi
	if [ "$N_SRC_ARGS" -eq 0 ]; then
		# The default SRC_ARG was set elsewhere
		DIRMODE=true
		SOURCEMODE=true
		SRC_ARGLIST="-s $(shell_quote "${SRC_ARG}")"
	fi

	#
	# If '-s' arg or args specified tgz files, extract them
	# to a scratch directory.
	#
	if $TGZMODE; then
		ETCTGZDIR="${SCRATCHDIR}/etc.tgz"
		echo "Note: Creating temporary directory ${ETCTGZDIR}"
		if ! mkdir "${ETCTGZDIR}"; then
			err 2 "Can't create ${ETCTGZDIR}"
		fi
		( # subshell to localise changes to "$@"
			eval "set -- ${TGZLIST}"
			for tgz in "$@"; do
				echo "Note: Extracting files from ${tgz}"
				cat "${tgz}" | (
					cd "${ETCTGZDIR}" &&
					tar -zxf -
				) || err 2 "Can't extract ${tgz}"
			done
		)
		SRC_DIR="${ETCTGZDIR}"
	else
		SRC_DIR="${SRC_ARG}"
	fi

	[ -d "${SRC_DIR}" ]	|| err 2 "${SRC_DIR} is not a directory"
	[ -d "${DEST_DIR}" ]	|| err 2 "${DEST_DIR} is not a directory"
	[ -n "${MACHINE}" ]	|| err 2 "\${MACHINE} is not defined"
	[ -n "${MACHINE_ARCH}" ] || err 2 "\${MACHINE_ARCH} is not defined"
	if ! $SOURCEMODE && ! [ -f "${SRC_DIR}/etc/mtree/set.etc" ]; then
		err 2 "Files from the etc.tgz set are missing"
	fi

		# If directories are /, clear them, so various messages
		# don't have leading "//".   However, this requires
		# the use of ${foo:-/} to display the variables.
		#
	[ "${SRC_DIR}" = "/" ]	&& SRC_DIR=""
	[ "${DEST_DIR}" = "/" ]	&& DEST_DIR=""

	detect_x11

	op="$1"
	shift

	case "${op}" in
	diff)
		op=check
		DIFF_STYLE=n			# default style is RCS
		OPTIND=1
		while getopts bcenpuw ch; do
			case "${ch}" in
			c|e|n|u)
				if [ "${DIFF_STYLE}" != "n" -a \
				    "${DIFF_STYLE}" != "${ch}" ]; then
					err 2 "conflicting output style: ${ch}"
				fi
				DIFF_STYLE="${ch}"
				;;
			b|p|w)
				DIFF_OPT="${DIFF_OPT} -${ch}"
				;;
			*)
				err 2 "unknown diff option"
				;;
			esac
		done
		shift $((${OPTIND} - 1))
		;;
	esac

	case "${op}" in

	usage|help)
		usage
		;;

	list)
		echo "Source directory: ${SRC_DIR:-/}"
		echo "Target directory: ${DEST_DIR:-/}"
		if $TGZMODE; then
			echo " (extracted from: ${SRC_ARG})"
		fi
		list
		;;

	check|fix)
		todo="$*"
		: ${todo:="${defaultitems}"}

		# ensure that all supplied items are valid
		#
		for i in ${todo}; do
			eval desc=\"\${desc_${i}}\"
			[ -n "${desc}" ] || err 2 "Unsupported ${op} '"${i}"'"
		done

		# perform each check/fix
		#
		echo "Source directory: ${SRC_DIR:-/}"
		if $TGZMODE; then
			echo " (extracted from: ${SRC_ARG})"
		fi
		echo "Target directory: ${DEST_DIR:-/}"
		items_passed=
		items_failed=
		for i in ${todo}; do
			echo "${i} ${op}:"
			( eval do_${i} ${op} )
			if [ $? -eq 0 ]; then
				items_passed="${items_passed} ${i}"
			else
				items_failed="${items_failed} ${i}"
			fi
		done

		if [ "${op}" = "check" ]; then
			plural="checks"
		else
			plural="fixes"
		fi

		echo "${PROGNAME} ${plural} passed:${items_passed}"
		echo "${PROGNAME} ${plural} failed:${items_failed}"
		if [ -n "${items_failed}" ]; then
		    exitstatus=1;
		    if [ "${op}" = "check" ]; then
			[ "$MACHINE" = "$(uname -m)" ] && m= || m=" -m $MACHINE"
			cat <<_Fix_me_
To fix, run:
    ${HOST_SH} ${0} ${SRC_ARGLIST} ${XSRC_DIR_FIX}-d ${DEST_DIR:-/}$m fix${items_failed}
Note that this may overwrite local changes.
_Fix_me_
		    fi
		fi

		;;

	*)
		warn "Unknown operation '"${op}"'"
		usage
		;;

	esac
}

# defaults
#
PROGNAME="${0##*/}"
SRC_ARG="/usr/src"
DEST_DIR="/"
: ${MACHINE:="$( uname -m )"}	# assume native build if $MACHINE is not set
: ${MACHINE_ARCH:="$( uname -p )"}# assume native build if not set

DIFF_STYLE=
NOT_FIXED=" (FIX MANUALLY)"
SCRATCHDIR="$( mkdtemp )" || err 2 "Can't create scratch directory"
trap "/bin/rm -rf \"\${SCRATCHDIR}\" ; exit 0" 1 2 3 15	# HUP INT QUIT TERM

umask 022
exec 3>/dev/null
exec 4>/dev/null
exitstatus=0

main "$@"
/bin/rm -rf "${SCRATCHDIR}"
exit $exitstatus