#! /bin/sh
#
# $NetBSD: regpkg,v 1.22 2014/05/30 08:37:35 uebayasi Exp $
#
# Copyright (c) 2003,2009 The NetBSD Foundation, Inc.
# All rights reserved.
#
# This code is derived from software contributed to The NetBSD Foundation
# by Alistair Crooks (agc@NetBSD.org)
#
# 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.
#

# Usage: regpkg [options] set pkgname
#
# Registers a syspkg in the database directory,
# and optionally creates a binary package.
#
# Options:
#   -q		Quiet.
#   -v		Verbose.
#   -f		Force.
#   -m		Ignore errors from missing files.
#   -u		Update.
#   -c		Use cached information from ${BUILD_INFO_CACHE}.
#   -d destdir	Sets DESTDIR.
#   -t binpkgdir Create a binary package (in *.tgz format) in the
#		specified directory.  Without this option, a binary
#		package is not created.
#   -M metalog	Use the specified metalog file to override file
#		or directory attributes when creating a binary package.
#   -N etcdir	Use the specified directory for passwd and group files.
#
# When -f is set:  If the desired syspkg already exists, it is overwritten.
# When -u is set:  If the desired syspkg already exists, it might be
#		overwritten or left alone, depending on whether it's older
#		or newer than the files that belong to the syspkg.
# When neither -u nor -f are set:  It's an error for the desired syspkg
#		to already exist.

prog="${0##*/}"
toppid=$$
rundir="$(dirname "$0")" # ${0%/*} isn't good enough when there's no "/"
. "${rundir}/sets.subr"

bomb()
{
	#echo "${prog}: bomb: start, toppid=${toppid} \$\$=$$"
	kill ${toppid}		# in case we were invoked from a subshell
	#echo "${prog}: bomb: killed ${toppid}"
	exit 1
}

# A literal newline
nl='
'
# A literal tab
tab='	'

# Prefixes for error messages, warnings, and important informational
# messages.
ERROR="${prog}: ERROR: "
WARNING="${prog}: WARNING: "
NOTE="${prog}: NOTE: "
ERRWARN="${ERROR}"	# may be changed by "-f" (force) command line flag
ERRWARNNOTE="${ERROR}"	# may be changed by "-u" (update) command line flag

#
# All temporary files will go in ${SCRATCH}, which will be deleted on
# exit.
#
SCRATCH="$(${MKTEMP} -d "/var/tmp/${0##*/}.XXXXXX")"
if [ $? -ne 0 -o \! -d "${SCRATCH}" ]; then
	echo >&2 "${prog}: Could not create scratch directory."
	bomb
fi

#
# cleanup() always deletes the SCRATCH directory, and might also
# delete other files or directories.
#
es=0
cleanup_must_delete_binpkgfile=false
cleanup_must_delete_dbsubdir=false
cleanup()
{
	trap - 0
	#echo "${prog}: cleanup start"
	if ${cleanup_must_delete_binpkgfile:-false} && [ -e "${binpkgfile}" ]
	then
		echo >&2 "${prog}: deleting partially-created ${binpkgfile}"
		rm -f "${binpkgfile}"
	fi
	if ${cleanup_must_delete_dbsubdir:-false} \
	   && [ -e "${SYSPKG_DB_SUBDIR}" ]
	then
		echo >&2 "${prog}: deleting partially-created ${SYSPKG_DB_SUBDIR}"
		rm -rf "${SYSPKG_DB_SUBDIR}"
	fi
	rm -rf "${SCRATCH}"
	#echo "${prog}: cleanup done, exit ${es}"
	exit ${es}
}
trap 'es=128; cleanup' 1 2 3 13 15	# HUP INT QUIT PIPE TERM
trap 'es=$?; cleanup' 0 		# EXIT

#
# Parse command line args.
#
verbose=false
verbosity=0
quiet=false
force=false
update=false
allowmissing=false
DESTDIR="${DESTDIR}"
binpkgdir=""
metalog=""
etcdir=""
SYSPKG_DB_TOPDIR=""
pkgset=""
pkg=""
parse_args()
{
	while [ $# -gt 2 ]; do
		case "$1" in
		-q)	quiet=true; verbose=false ;;
		-v)	verbose=true; quiet=false
			verbosity=$(( ${verbosity} + 1 ))
			;;
		-f)	force=true ;;
		-u)	update=true ;;
		-m)	allowmissing=true ;;
		-c)	# The -c option is ignored.  The BUILD_INFO_CACHE
			# environment variable is used instead.
			;;
		-d)	DESTDIR="$2"; shift ;;
		-d*)	DESTDIR="${1#-?}" ;;
		-t)	binpkgdir="$2"; shift ;;
		-t*)	binpkgdir="${1#-?}" ;;
		-M)	metalog="$2"; shift ;;
		-M*)	metalog="${1#-?}" ;;
		-N)	etcdir="$2"; shift ;;
		-N*)	etcdir="${1#-?}" ;;
		*)	break ;;
		esac
		shift
	done
	if ${force}; then
		ERRWARN="${WARNING}"
	else
		ERRWARN="${ERROR}"
	fi
	if ${update}; then
		ERRWARNNOTE="${NOTE}"
	else
		ERRWARNNOTE="${ERRWARN}"
	fi
	DESTDIR="${DESTDIR%/}" # delete trailing "/" if any
	if [ \! -n "${etcdir}" ]; then
		etcdir="${DESTDIR}/etc"
	fi
	if [ -n "${binpkgdir}" -a \! -d "${binpkgdir}" ]; then
		echo >&2 "${ERROR}binary pkg directory ${binpkgdir} does not exist"
		bomb
	fi
	#
	# SYSPKG_DB_TOPDIR is the top level directory for registering
	# syspkgs.  It defaults to ${DESTDIR}/var/db/syspkg, but can be
	# overridden by environment variables SYSPKG_DBDIR or PKG_DBDIR.
	#
	# Note that this corresponds to the default value of PKG_DBDIR
	# set in .../distrib/syspkg/mk/bsd.syspkg.mk.
	# 
	SYSPKG_DB_TOPDIR="${SYSPKG_DBDIR:-${PKG_DBDIR:-${DESTDIR}/var/db/syspkg}}"

	if [ $# -ne 2 ]; then
		echo "Usage: regpkg [options] set pkgname"
		bomb
	fi

	pkgset="$1"
	pkg="$2"
}

#
# make_PLIST() creates a skeleton PLIST from the pkgset description.
#
# The result is stored in the file ${PLIST}.
#
PLIST="${SCRATCH}/PLIST"
make_PLIST()
{
	if ${verbose}; then
		echo "Making PLIST for \"${pkg}\" package (part of ${pkgset} set)"
	fi
	prefix="${DESTDIR:-/}"
	realprefix=/
	${HOST_SH} "${rundir}/makeplist" -p "${prefix}" -I "${realprefix}" \
		"${pkgset}" "${pkg}" \
		>"${PLIST}" 2>"${SCRATCH}/makeplist-errors"
	if ${EGREP} -v '^DEBUG:' "${SCRATCH}/makeplist-errors"; then
		# "find" invoked from makeplist sometimes reports
		# errors about missing files or directories, and
		# makeplist ignores the errors.  Catch them here.
		echo >&2 "${ERROR}makeplist reported errors for ${pkg}:"
		cat >&2 "${SCRATCH}/makeplist-errors"
		echo >&2 "${ERROR}see above for errors from makeplist"
		if ${allowmissing}; then
			echo >&2 "${prog}: ${NOTE}: ignoring above errors, due to '-m' option."
		else
			${force} || bomb
		fi
	fi
}

#
# init_allfiles() converts the PLIST (which contains relative filenames)
# into a list of absolute filenames.  Directories are excluded from the
# result.
# 
# The result is stored in the variable ${allfiles}.
#
allfiles=''
init_allfiles()
{
	[ -f "${PLIST}" ] || make_PLIST
	allfiles="$(${AWK} '
		BEGIN { destdir = "'"${DESTDIR%/}"'" }
		/^@cwd/ { prefix = $2; next }
		/^@dirrm/ { next }
		{ printf("%s%s%s\n", destdir, prefix, $0) }' "${PLIST}")"
}

#
# init_newestfile() finds the newest file (most recent mtime).
#
# The result is stored in the variable ${newestfile}.
#
newestfile=''
init_newestfile()
{
	[ -s "${allfiles}" ] || init_allfiles
	# We assume no shell special characters in ${allfiles},
	# and spaces only between file names, not inside file names.
	# This should be safe, because it has no no user-specified parts.
	newestfile="$(${LS} -1dt ${allfiles} | ${SED} '1q')"
}

#
# Various ways of getting parts of the syspkg version number:
#
# get_osvers() - get the OS version number from osrelease.sh or $(uname -r),
#		return it in ${osvers}, and set ${method}.
# get_tinyvers() - get the tiny version number from the "versions" file,
#		and return it in ${tinyvers}.  Does not set ${method}.
# get_newest_rcsid_date() - get the newest RCS date,
#		and return it in ${newest}.  Does not set ${method}.
# get_newest_mtime_date() - get the newest file modification date,
#		and return it in ${newest}.  Does not set ${method}.
# get_newest_date() - get date from rcsid or mtime, return it in ${newest},
#		and set ${method}.
#
get_osvers()
{
	if [ -f ../../sys/conf/osrelease.sh ]; then
		osvers="$(${HOST_SH} ../../sys/conf/osrelease.sh)"
		method=osreleases
	else
		osvers="$(${UNAME} -r)"
		method=uname
	fi
	#echo "${osvers}"
}
get_tinyvers()
{
	tinyvers="$(${AWK} '$1 ~ '/"${pkg}"/' { print $2 }' \
			"${rundir}/versions")"
	case "${tinyvers}" in
	"")	tinyvers=0
		;;
	esac
	#echo "${tinyvers}"
}
get_newest_rcsid_date()
{
	[ -s "${allfiles}" ] || init_allfiles

	# Old RCS identifiers might have 2-digit years, so we match both
	# YY/MM/DD and YYYY/MM/DD.  We also try to deal with the Y10K
	# problem by allowing >4 digit years.
	newest=0
	case "${allfiles}" in
	"")	;;
	*)	newest="$(${IDENT} ${allfiles} 2>/dev/null | ${AWK} '
			BEGIN { last = 0 }
			$2 == "crt0.c,v" { next }
			NF == 8 && \
			$4 ~ /^[0-9][0-9]\/[0-9][0-9]\/[0-9][0-9]$/ \
				{ t = "19" $4; gsub("/", "", t);
				  if (t > last) last = t; }
			NF == 8 && \
			$4 ~ /^[0-9][0-9][0-9][0-9][0-9]*\/[0-9][0-9]\/[0-9][0-9]$/ \
				{ t = $4; gsub("/", "", t);
				  if (t > last) last = t; }
			END { print last }')"
		method=ident
		;;
	esac
	#echo "${newest}"
}
get_newest_mtime_date()
{
	[ -s "${newestfile}" ] || init_newestfile

	# We could simplify the awk program to take advantage of the
	# fact thet it should have exactly one line of input.
	newest="$(${ENV_CMD} TZ=UTC LOCALE=C ${LS} -lT "${newestfile}" \
		| ${AWK} '
		BEGIN { newest = 0 }
		{
			t = $9 "";
			if ($6 == "Jan") t = t "01";
			if ($6 == "Feb") t = t "02";
			if ($6 == "Mar") t = t "03";
			if ($6 == "Apr") t = t "04";
			if ($6 == "May") t = t "05";
			if ($6 == "Jun") t = t "06";
			if ($6 == "Jul") t = t "07";
			if ($6 == "Aug") t = t "08";
			if ($6 == "Sep") t = t "09";
			if ($6 == "Oct") t = t "10";
			if ($6 == "Nov") t = t "11";
			if ($6 == "Dec") t = t "12";
			if ($7 < 10) t = t "0";
			t = t $7;
			#these next two lines add the 24h clock onto the date
			#gsub(":", "", $8);
			#t = sprintf("%s.%4.4s", t, $8);
			if (t > newest) newest = t;
		}
		END { print newest }')"
	#echo "${newest}"
}
get_newest_date()
{
	get_newest_rcsid_date
	case "${newest}" in
	""|0)	get_newest_mtime_date
		method=ls
		;;
	*)	method=rcsid
		;;
	esac
	#echo "${newest}"
}

#
# choose_version_number() chooses the syspkg version number,
# by concatenating several components (OS version, syspkg "tiny"
# version and date).  We end up with something like
# osvers="3.99.15", tinyvers="0", newest="20060104",
# and t="3.99.15.0.20060104".
#
# The result is stored in the variables ${t} and ${method}.
#
method=''
t=''
choose_version_number()
{
	get_osvers; m1="${method}"
	get_tinyvers # does not set ${method}
	get_newest_date; m2="${method}"
	t="${osvers}.${tinyvers}.${newest}"
	method="${m1}.${m2}"

	# print version number that we're using
	if ${verbose}; then
		echo "${pkg} - ${t} version using ${method} method"
	fi
}

#
# init_db_opts() sets the dbfile, dbtype and db_opts variables,
# used for accessing the pkgdb.byfile.db database.
#
init_db_opts()
{
	dbfile="${SYSPKG_DB_TOPDIR}/pkgdb.byfile.db"
	dbtype="btree"
	db_opts=''
	: ${TARGET_ENDIANNESS:="$(arch_to_endian "${MACHINE_ARCH}")"}
	case "${TARGET_ENDIANNESS}" in
	4321)	db_opts="${db_opts} -E B" # big-endian
		;;
	1234)	db_opts="${db_opts} -E L" # little-endian
		;;
	*)
		echo >&2 "${WARNING}Unknown or unsupported target endianness"
		echo >&2 "${NOTE}Using host endianness"
		;;
	esac
	if ${update} || ${force}; then
		# overwriting an existing entry is not an error
		db_opts="${db_opts} -R"
	fi
	if [ ${verbosity} -lt 2 ]; then
		# don't print all the keys added to the database
		db_opts="${db_opts} -q"
	fi
}

#
# print_dir_exec_lines outputs an "@exec install" line for each
# directory in ${PLIST}
#
print_dir_exec_lines()
{
	local dir uname gname mode
	local dot_slash_dir
	local no_dot_dir
	local word line
	${AWK} '/^@dirrm/ { print $2 }' <"${PLIST}" | \
	${SORT} | \
	while read dir; do
		# Sanitise the name. ${dir} could be an absolute or
		# relative name, with or without a leading "./".
		# ${dot_slash_dir} always has a leading "./" (except when
		# it's exactly equal to "."). ${no_dot_dir} never has a
		# leading "." or "/" (except when it's exactly equal to
		# ".").
		case "${dir}" in
		.|./|/)	dot_slash_dir=.  ;;
		./*)	dot_slash_dir="${dir}" ;;
		/*)	dot_slash_dir=".${dir}" ;;
		*)	dot_slash_dir="./${dir}" ;;
		esac
		no_dot_dir="${dot_slash_dir#./}"
		# Get the directory's owner, group, and mode
		# from the live file system, or let it be overridden
		# by the metalog.
		eval "$(${STAT} -f 'uname=%Su gname=%Sg mode=%#OLp' \
				"${DESTDIR}/${dot_slash_dir}")"
		if [ -n "${metalog}" ]; then
			line="$(echo "${dot_slash_dir}" | \
				${AWK} -f "${rundir}/join.awk" \
					/dev/stdin "${metalog}")"
			for word in ${line}; do
				case "${word}" in
				uname=*|gname=*|mode=*)	eval "${word}" ;;
				esac
			done
		fi
		# XXX: Work around yet another pkg_add bug: @cwd lines
		# do not actually cause the working directory to change,
		# so file names in @exec lines need to be qualified by
		# %D, which (in our case, since we know there's an
		# "@cwd /" line) will be the dir name passed to
		# "pkg_add -p PREFIX".
		case "${no_dot_dir}" in
		.) d="%D" ;;
		*) d="%D/${no_dot_dir}" ;;
		esac
		cat <<EOF
@exec install -d -o ${uname} -g ${gname} -m ${mode} ${d}
EOF
	done
}

#
# register_syspkg() registers the syspkg in ${SYSPKG_DB_TOPDIR}.
# This involves creating the subdirectory ${SYSPKG_DB_SUBDIR}
# and populating it with several files.
#
register_syspkg()
{
	cleanup_must_delete_dbsubdir=true
	[ -n "${SYSPKG_DB_SUBDIR}" ] || bomb
	mkdir -p "${SYSPKG_DB_SUBDIR}"

	#
	# Guess what versions of other packages to depend on.
	#
	# If we are using the OS version as part of the pkg
	# version, then depend on any version ">=${osvers}".  For
	# example, etc-sys-etc-1.6ZI.0.20040206 might depend on
	# base-sys-root>=1.6ZI.
	#
	# Failing that, depend on any version "-[0-9]*".
	#
	# XXX: We could extend the format of the "deps" file to carry
	# this sort of information, so we wouldn't have to guess.
	#
	case "${t}" in
	${osvers}.*)	depversion=">=${osvers}" ;;
	*)		depversion="-[0-9]*" ;;
	esac

	#
	# Add the dependencies.
	#
	# We always add a "@pkgdep" line for each prerequisite package.
	#
	# If the prerequisite pkg is already registered (as it should be
	# if our caller is doing things in the right order), then we put
	# its exact version number in a "@blddep" line.
	#
	${AWK} '$1 ~ '/"${pkg}"/' { print $2 }' "${rundir}/deps" | ${SORT} | \
	while read depname; do
		# ${pkgdepglob} is a shell glob pattern that should match
		# any version of a pkg.  ${pkgdep} uses the special syntax
		# for pkg dependencies, and is not usable as a shell
		# glob pattern.
		pkgdepglob="${depname}-[0-9]*"
		pkgdep="${depname}${depversion}"
		echo "@pkgdep ${pkgdep}"
		blddep="$(cd "${SYSPKG_DB_TOPDIR}" && echo ${pkgdepglob} \
			|| bomb)"
		case "${blddep}" in
		*\*)	# pkgdepglob did not match anything
			echo >&2 "${WARNING}${pkg} depends on '${pkgdep}' but there is no matching syspkg in ${SYSPKG_DB_TOPDIR}"
			;;
		*\ *)	# pkgdepglob matched more than once.
			echo >&2 "${ERRWARN}${pkg} depends on '${pkgdep}' but there are multiple matching syspkgs in ${SYSPKG_DB_TOPDIR}"
			${force} || bomb
			# If ${force} is set, then assume that the last
			# match is the most recent.
			# XXX: This might be wrong, because of
			# differences between lexical sorting and
			# numeric sorting.
			lastmatch="${blddep##* }"
			echo "@blddep ${lastmatch}"
			;;
		*)	# exactly one match.
			# XXX: We ignore the possibility that the
			# version we found via ${pkgdepglob} might not
			# satisfy ${pkgdep}.  We could conceivably use
			# "pkg_admin pmatch" to check, but that's not a
			# host tool so we can't assume that it will be
			# available.
			echo "@blddep ${blddep}"
			;;
		esac
	done >>"${PLIST}"

	# create the comment (should be one line)
	comment="$(${AWK} '$1 ~ '/"${pkg}"/' \
			{ print substr($0, length($1) + 2) }' \
			"${rundir}/comments")"
	case "${comment}" in
	"")	echo >&2 "${WARNING}no comment for \"${pkg}\" (using placeholder)"
		comment="System package for ${pkg}"
		;;
	*"${nl}"*)
		echo >&2 "${ERRWARN}multi-line comment for \"${pkg}\""
		${force} || bomb
		;;
	esac
	echo "${comment}" > "${SYSPKG_DB_SUBDIR}/+COMMENT"

	# create the description (could be multiple lines)
	descr="$(${AWK} '$1 ~ '/"${pkg}"/' {
			print substr($0, length($1) + 2) }' \
			"${rundir}/descrs")"
	case "${descr}" in
	"")	echo >&2 "${WARNING}no description for \"${pkg}\" (re-using comment)" 2>&1
		descr="${comment}"
		;;
	esac
	echo "${descr}" > "${SYSPKG_DB_SUBDIR}/+DESC"
	${PRINTF} "\nHomepage:\nhttp://www.NetBSD.org/\n" >> "${SYSPKG_DB_SUBDIR}/+DESC"

	# create the build information
	if [ x"${BUILD_INFO_CACHE}" = x ]; then
		{
		# These variables describe the build
		# environment, not the target.
		echo "OPSYS=$(${UNAME} -s)"
		echo "OS_VERSION=$(${UNAME} -r)"
		${MAKE} -B -f- all <<EOF
.include <bsd.own.mk>
all:
	@echo OBJECT_FMT=${OBJECT_FMT}
	@echo MACHINE_ARCH=${MACHINE_ARCH}
	@echo MACHINE_GNU_ARCH=${MACHINE_GNU_ARCH}
EOF
		} > "${SYSPKG_DB_SUBDIR}/+BUILD_INFO"
	else
		cp "${BUILD_INFO_CACHE}" "${SYSPKG_DB_SUBDIR}/+BUILD_INFO"
	fi

	# test for attributes
	args=""
	attrs="$(${AWK} '$1 ~ '/"${pkg}"/' { \
			print substr($0, length($1) + 2) }' \
		"${rundir}/attrs")"
	for a in "${attrs}"; do
		case "${attrs}" in
		"")	;;
		preserve)
			echo "${pkg}-${t}" >"${SYSPKG_DB_SUBDIR}/+PRESERVE"
			args="${args} -n ${SYSPKG_DB_SUBDIR}/+PRESERVE"
			;;
		esac
	done

	#
	# Create ${SYSPKGSIR}/+CONTENTS from ${PLIST}, by adding an
	# "@name" line and a lot of "@comment MD5:" lines.
	#
	{
		rcsid='$NetBSD: regpkg,v 1.22 2014/05/30 08:37:35 uebayasi Exp $'
		utcdate="$(${ENV_CMD} TZ=UTC LOCALE=C \
			${DATE} '+%Y-%m-%d %H:%M')"
		user="${USER:-root}"
		host="$(${HOSTNAME_CMD})"
		echo "@name ${pkg}-${t}"
		echo "@comment Packaged at ${utcdate} UTC by ${user}@${host}"
		echo "@comment Packaged using ${prog} ${rcsid}"
		# XXX: "option extract-in-place" might help to get
		#	pkg_add to create directories.
		# XXX: no, it doesn't work.  Yet another pkg_add bug.
		## echo "@option extract-in-place"
		# Move the @pkgdep and @blddep lines up, so that
		# they are easy to see when people do "less
		# ${DESTDIR}/var/db/syspkg/*/+CONTENTS".
		${EGREP} '^(@pkgdep|@blddep)' "${PLIST}" || true
		# Now do the remainder of the file.
		while read line; do
			case "${line}" in
			@pkgdep*|@blddep*)
				# already handled by grep above
				;;
			@cwd*)
				# There should be exactly one @cwd line.
				# Just after it, add an "@exec mkdir"
				# line for every directory.  This is to
				# work around a pkg-add bug (see
				# <http://mail-index.NetBSD.org/tech-pkg/2003/12/11/0018.html>)
				echo "${line}"
				print_dir_exec_lines
				;;
			@*)	
				# just pass through all other @foo lines
				echo "${line}"
				;;
			*)	
				# This should be a file name.  Pass it
				# through, and append "@comment MD5:".
				# XXX why not SHA256 ?
				echo "${line}"
				file="${DESTDIR}${line}"
				if [ -f "${file}" -a -r "${file}" ];
				then
					md5sum="$(${CKSUM} -n -m "${file}" \
						   | ${AWK} '{print $1}'
						)"
					echo "@comment MD5:${md5sum}"
				fi
				;;
			esac
		done <"${PLIST}"
	} >"${SYSPKG_DB_SUBDIR}/+CONTENTS"

	#
	#  Update ${SYSPKG_DB_TOPDIR}/pkgdb.byfile.db.
	#
	{
		init_db_opts # sets dbfile, dbtype, and db_opts

		# Transform ${PLIST} into a form to be used as keys in
		# ${dbfile}.  The results look like absolute paths,
		# but they are really relative to ${DESTDIR}.
		#
		# "@dirrm ."		-> "/"
		# "@dirrm foo/bar"	-> "/foo/bar"
		# "@dirrm ./foo/bar"	-> "/foo/bar"
		# "foo/bar/baz"		-> "/foo/bar/baz"
		# "./foo/bar/baz"	-> "/foo/bar/baz"
		#
		dblist="${SCRATCH}/dblist"
		${AWK} '/^@dirrm \.\//	{gsub("^.", "", $2); print $2; next}
			/^@dirrm \.$/	{print "/"; next}
			/^@dirrm/	{print "/" $2; next}
			/^@/		{next}
			/^\.\//		{gsub("^.", "", $0); print $0; next}
			/./		{print "/" $0; next}' \
			<"${PLIST}" >"${dblist}"
		# Add all the path names to the database.
		${AWK} '{print $1 "\t" "'"${pkg}-${t}"'"}' <"${dblist}" \
		| ${DB} -w ${db_opts} -F "${tab}" -f - "${dbtype}" "${dbfile}"
	}

	if ${verbose}; then
		echo "Registered ${pkg}-${t} in ${SYSPKG_DB_TOPDIR}"
	elif ! ${quiet}; then
		echo "Registered ${pkg}-${t}"
	fi

	cleanup_must_delete_dbsubdir=false
}

#
# create_syspkg_tgz() creates the *.tgz file for the package.
#
# The output file is ${binpkgdir}/${pkg}-${t}.tgz.
#
create_syspkg_tgz()
{
	#
	# pkg_create does not understand metalog files, so we have to
	# use pax directly.
	#
	# We create two specfiles: specfile_overhead describes the
	# special files that are part of the package system's metadata
	# (+CONTENTS, +COMMENT, +DESCR, and more); and specfile_payload
	# describes the files and directories that we actually want as
	# part of the package's payload.
	#
	# We then use the specfiles to create a compressed tarball that
	# contains both the overhead files and the payload files.
	#
	# There's no trivial way to get a single pax run to do
	# everything we want, so we run pax twice, with a different
	# working directory and a different specfile each time.
	#
	# We could conceivably make clever use of pax's "-s" option to
	# get what we want from a single pax run with a single (more
	# complicated) specfile, but the extra trouble doesn't seem
	# warranted.
	#
	cleanup_must_delete_binpkgfile=true
	specfile_overhead="${SCRATCH}/spec_overhead"
	specfile_payload="${SCRATCH}/spec_payload"
	tarball_uncompressed="${SCRATCH}/tarball_uncompressed"

	# Create a specfile for all the overhead files (+CONTENTS and
	# friends).
	{
		plusnames_first="${SCRATCH}/plusnames_first"
		plusnames_rest="${SCRATCH}/plusnames_rest"

		# Ensure that the first few files are in the same order
		# that "pkg_create" would have used, just in case anything
		# depends on that.  Other files in alphabetical order.
		SHOULD_BE_FIRST="+CONTENTS +COMMENT +DESC"
		(
			cd "${SYSPKG_DB_SUBDIR}" || bomb
			for file in ${SHOULD_BE_FIRST}; do
				[ -e "./${file}" ] && echo "${file}"
			done >"${plusnames_first}"
			${LS} -1 | ${FGREP} -v -f "${plusnames_first}" \
				>"${plusnames_rest}" \
				|| true
		)

		# Convert the file list to specfile format, and override the
		# uid/gid/mode.
		{
			echo ". optional type=dir"
			${AWK} '{print "./" $0 " type=file uid=0 gid=0 mode=0444"
				}' "${plusnames_first}" "${plusnames_rest}"
		} >"${specfile_overhead}"
	}

	# Create a specfile for the payload of the package.
	{
		spec1="${SCRATCH}/spec1"
		spec2="${SCRATCH}/spec2"

		# Transform ${PLIST} into simple specfile format:
		#
		# "@dirrm ."		-> ". type=dir"
		# "@dirrm foo/bar"	-> "./foo/bar type=dir"
		# "@dirrm ./foo/bar"	-> "./foo/bar type=dir"
		# "foo/bar/baz"		-> "./foo/bar/baz"
		# "./foo/bar/baz"	-> "./foo/bar/baz"
		#
		# Ignores @cwd lines.  This should be safe, given how
		# makeplist works.
		${AWK} '/^@dirrm \.\//	{print $2 " type=dir"; next}
			/^@dirrm \.$/	{print ". type=dir"; next}
			/^@dirrm/	{print "./" $2 " type=dir"; next}
			/^@/		{next}
			/^\.\//		{print $0; next}
			/./		{print "./" $0; next}' \
			<"${PLIST}" |
		# Escape some characters to match the new mtree(8) format.
		# C.f. usr.sbin/mtree/spec.c:vispath()
		# XXX escape only '[' for now
		${SED} -e 's,\[,\\133,g' \
		>"${spec1}"

		# If metalog was specified, attributes from metalog override
		# attributes in the file system.  We also fake up an
		# entry for the ./etc/mtree/set.${pkgset} file.
		{
			if [ -n "${metalog}" ]; then
				${AWK} -f "${rundir}/join.awk" \
					"${spec1}" "${metalog}"
				${AWK} -f "${rundir}/join.awk" \
					"${spec1}" /dev/stdin <<EOF
./etc/mtree/set.${pkgset} type=file mode=0444 uname=root gname=wheel
EOF
			else
				cat "${spec1}"
			fi
		} >"${spec2}"

		#
		# If a file or directory to was mentioned explicitly
		# in ${PLIST} but not mentioned in ${metalog}, then the
		# file or directory will not be mentioned in ${spec2}.
		# This is an error, and means that the metalog was
		# not built correctly.
		#
		if [ -n "${metalog}" ]; then
			names1="${SCRATCH}/names1"
			names2="${SCRATCH}/names2"
			${AWK} '{print $1}' <"${spec1}" | ${SORT} >"${names1}"
			${AWK} '{print $1}' <"${spec2}" | ${SORT} >"${names2}"
			if ${FGREP} -v -f "${names2}" "${spec1}" >/dev/null
			then
				cat >&2 <<EOM
${ERRWARN}The metalog file (${metalog}) does not
	contain entries for the following files or directories
	which should be part of the ${pkg} syspkg:
EOM
				${FGREP} -v -f "${names2}" "${spec1}" >&2
				${force} || bomb
			fi
			if ${FGREP} -v -f "${names1}" "${spec2}" >/dev/null
			then
				cat >&2 <<EOM
${ERRWARN}The following lines are in the metalog file
	(${metalog}), and the corresponding files or directories
	should be in the ${pkg} syspkg, but something is wrong:
EOM
				${FGREP} -v -f "${names1}" "${spec2}" >&2
				bomb
			fi
		fi

		# Add lines (tagged "optional") for any implicit directories.
		#
		# For example, if we have a file ./foo/bar/baz, then we add
		# "./foo/bar optional type=dir", "./foo optional type=dir",
		# and ". optional type=dir", unless those directories were
		# already mentioned explicitly.
		#
		${AWK} -f "${rundir}/getdirs.awk" "${spec2}" \
		| ${SORT} -u >"${specfile_payload}"
	}

	# Use two pax invocations followed by gzip to create
	# the tgz file.
	#
	# Remove any leading "./" from path names, because that
	# could confuse tools that work with binary packages.
	(
		cd "${SYSPKG_DB_SUBDIR}" && \
		${PAX} -O -w -d -N"${etcdir}" -M '-s,^\./,,' \
			-f "${tarball_uncompressed}" \
			<"${specfile_overhead}" \
		|| bomb
	)
	(
		cd "${DESTDIR:-/}" && \
		${PAX} -O -w -d -N"${etcdir}" -M '-s,^\./,,' \
			-a -f "${tarball_uncompressed}" \
			<"${specfile_payload}" \
		|| bomb
	)
	${GZIP_CMD} -9n <"${tarball_uncompressed}" >"${binpkgfile}" || bomb

	# (Extra space is to make message line up with "Registered" message.)
	if ${verbose}; then
		echo "  Packaged ${binpkgfile}"
	elif ! ${quiet}; then
		echo "  Packaged ${binpkgfile##*/}"
	fi

	cleanup_must_delete_binpkgfile=false

}

#
# do_register_syspkg() registers the syspkg if appropriate.
#
# If SYSPKG_DB_SUBDIR already exists, that might be an error, depending
# on ${force} and ${update} flags.
#
do_register_syspkg()
{
	# Check that necessary variables are defined
	[ -n "${SYSPKG_DB_TOPDIR}" ] || bomb
	[ -n "${SYSPKG_DB_SUBDIR}" ] || bomb

	# Create SYSPKG_DB_TOPDIR if necessary
	[ -d "${SYSPKG_DB_TOPDIR}" ] || mkdir -p "${SYSPKG_DB_TOPDIR}" || bomb

	# A function to delete db entries referring to any version of ${pkg}
	delete_old_db_entries()
	{
		init_db_opts # sets dbfile, dbtype, and db_opts
		dblist="${SCRATCH}/dblist"
		${DB} ${db_opts} -O "${tab}" "${dbtype}" "${dbfile}" \
		| ${AWK} -F "${tab}" '$2 ~ /^'"${pkg}"'-[0-9]/ { print $1 }' \
			>"${dblist}"
		${DB} -d ${db_opts} -f "${dblist}" "${dbtype}" "${dbfile}"
	}

	# A function to delete any old version of ${pkg}
	delete_old_pkg()
	{
		pattern="${pkg}-[0-9]*"
		matches="$(cd "${SYSPKG_DB_TOPDIR}" && echo ${pattern} \
			|| bomb)"
		echo >&2 "${NOTE}deleting old pkg (${matches})"
		cleanup_must_delete_dbsubdir=true
		delete_old_db_entries
		( cd "${SYSPKG_DB_TOPDIR}" && rm -rf ${matches} )
	}

	# Check whether another version of ${pkg} is already registered.
	pattern="${pkg}-[0-9]*"
	matches="$(cd "${SYSPKG_DB_TOPDIR}" && echo ${pattern} || bomb)"
	case "${matches}" in
	*\*)		;;	# wildcard did not match anything
	"${pkg}-${t}")	;;	# exact match
	*)	echo >&2 "${ERRWARNNOTE}another version of ${pkg} is already registered"
		${verbose} && echo >&2 "	in ${SYSPKG_DB_TOPDIR}"
		${verbose} && echo >&2 "	(while registering ${pkg}-${t})"
		${force} || ${update} || bomb
		delete_old_pkg
		;;
	esac

	# Check whether the desired version of ${pkg} is already registered,
	# and create it if appropriate.
	if [ -d "${SYSPKG_DB_SUBDIR}" ]; then
		echo >&2 "${ERRWARNNOTE}${pkg}-${t} is already registered"
		${verbose} && echo >&2 "	in ${SYSPKG_DB_TOPDIR}"
		if ${force}; then
			delete_old_pkg
			register_syspkg
		elif ${update}; then
			#
			# If all files in SYSPKG_DB_SUBDIR are newer
			# than all files in the pkg, then do nothing.
			# Else delete and re-register the pkg.
			#
			[ -n "${newestfile}" ] || init_newestfile
			if [ -n "${newestfile}" ]; then
				case "$(${FIND} "${SYSPKG_DB_SUBDIR}" -type f \
					! -newer "${newestfile}" -print)" \
				in
				"")	;;
				*)
					echo >&2 "${NOTE}some files are newer but pkg version is unchanged"
					delete_old_pkg
					register_syspkg
					;;
				esac

			else
				# No files in the pkg?  (This could happen
				# if a pkg contains only directories.)
				# Do nothing (keep the already-registered pkg).
				:
			fi
		else
			bomb
		fi
	else
		register_syspkg
	fi
}

#
# do_create_syspkg_tgz() creates the binary pkg (*.tgz) if
# appropriate.
#
# If binpkgfile already exists, that might be an error, depending on
# ${force} and ${update} flags.
#
do_create_syspkg_tgz()
{
	[ -n "${binpkgfile}" ] || bomb

	delete_and_recreate()
	{
		echo >&2 "${ERRWARNNOTE}deleting and re-creating ${pkg}-${t}.tgz"
		rm -f "${binpkgfile}"
		create_syspkg_tgz
	}

	# Check whether another version of ${pkg} already exists.
	pattern="${pkg}-[0-9]*"
	matches="$(cd "${binpkgdir}" && echo ${pattern} || bomb)"
	case "${matches}" in
	*\*)	;;	# wildcard did not match anything
	"${pkg}-${t}.tgz") ;;	# exact match
	*)	echo >&2 "${ERRWARNNOTE}another version of ${pkg} binary pkg already exists"
		${verbose} && echo >&2 "	in ${binpkgdir}"
		${verbose} && echo >&2 "	(while creating ${pkg}-${t}.tgz)"
		# If neither force nor update, this is a fatal error.
		# If force but not update, then leave old .tgz in place.
		# If update, then delete the old .tgz.
		${force} || ${update} || bomb
		if ${update}; then
			echo >&2 "${NOTE}deleting old binary pkg (${matches})"
			( cd "${binpkgdir}" && rm -f ${matches} || bomb )
		fi
		;;
	esac

	# Check whether the desired version of ${pkg} already exists,
	# and create it if appropriate.
	if [ -e "${binpkgfile}" ]; then
		echo >&2 "${ERRWARNNOTE}${pkg}-${t}.tgz already exists"
		${verbose} && echo >&2 "	in ${binpkgdir}"
		if ${force}; then
			delete_and_recreate
		elif ${update}; then
			#
			# If all files in SYSPKG_DB_SUBDIR are older
			# than ${binpkgfile}, then do nothing.
			# Else delete and re-create the tgz.
			#
			case "$(${FIND} "${SYSPKG_DB_SUBDIR}" -type f \
				-newer "${binpkgfile}" -print)" \
			in
			"")	;;
			*)	delete_and_recreate ;;
			esac
		else
			bomb
		fi
	else
		create_syspkg_tgz
	fi
}

####################
# begin main program

parse_args ${1+"$@"}
make_PLIST
choose_version_number
SYSPKG_DB_SUBDIR="${SYSPKG_DB_TOPDIR}/${pkg}-${t}"
do_register_syspkg
if [ -n "${binpkgdir}" ]; then
	binpkgfile="${binpkgdir}/${pkg}-${t}.tgz"
	do_create_syspkg_tgz
fi

exit 0