General cleanup, pt. III.

dist/dist_digest.dist: removes obsolete dist file.
etc/{build.usage,README.md}: updated.
groups/000.host_tools.group:{autoconf,automake,gettext_tiny,install_strip,libtool,m4}_host: moved from groups/010.host_deps.group.
groups/221.native_packages_dev.group:lua: moved from groups/231.native_packages_etc.group.
groups/221.native_packages_dev.group:lua:${PKG_FORCE_AUTORECONF}: set.
groups/231.native_packages_etc.group:{mlogin,tdnf}:${PKG_FORCE_AUTORECONF}: set.
groups/241.native_packages_inet.group:nullmailer:${PKG_FORCE_AUTORECONF}: set.
groups/251.native_packages_lib.group:lib{asr,gpg_error}:${PKG_FORCE_AUTORECONF}: set.
midipix.env, etc/README.md, subr/pkg_configure_autotools.subr: adds FORCE_NO_AUTORECONF.
subr/rtl_fileop.subr: adds ch{mod,own} fileops.
vars/{check_updates,jamvm,lib{asr,gpg_error},lua,mlogin,tdnf}.vars: removes obsolete vars file.

18 files changed, 169 insertions, 81 deletions

diff --git a/subr/ex_pkg_dispatch.subr b/subr/ex_pkg_dispatch.subr
index ed860739..749fe7f7 100644
--- a/subr/ex_pkg_dispatch.subr
+++ b/subr/ex_pkg_dispatch.subr
@@ -99,14 +99,14 @@ exp_pkg_dispatch_package() {
 	if "${_dispatch_fn}" start_pkg "${_group_name}" "${_pkg_name}" "$((${EXP_PKG_DISPATCH_COUNT}+1))" "${EXP_PKG_DISPATCH_COUNT_MAX}"; then
 		: $((EXP_PKG_DISPATCH_NJOBS+=1)); : $((EXP_PKG_DISPATCH_COUNT+=1)); EX_PKG_DISPATCH_WAIT="$(rtl_lconcat "${EX_PKG_DISPATCH_WAIT}" "${_pkg_name}")";
 		(set +o errexit -o noglob; BUILD_IS_PARENT=0;
-		if ex_pkg_env "${_build_steps_default}" "${_build_vars_default}"	\
+		if ex_pkg_env "${_build_steps_default}" "${_build_vars_default}"		\
 				"${_group_name}" "${_pkg_name}" "${_restart_at}" "${_workdir}"; then
 			ex_pkg_exec "${_dispatch_fn}" "${_group_name}" "${_pkg_name}" "${_restart_at}";
 		else
-			return "${?}";
+			return 1;
 		fi;) 1>"${_workdir}/${_pkg_name}_stderrout.log" 2>&1 3>"${_pipe_path}" &
 	else
-		return "${?}";
+		return 1;
 	fi;
 };
 
diff --git a/subr/ex_pkg_env.subr b/subr/ex_pkg_env.subr
index dfcb0f69..7b1483b7 100644
--- a/subr/ex_pkg_env.subr
+++ b/subr/ex_pkg_env.subr
@@ -88,7 +88,7 @@ ex_pkg_env() {
 	rtl_fileop source_opt "vars/${_pkg_name}.vars" "${_group_name}/${_pkg_name}.${_group_name}";
 	if ! exp_pkg_env_set "${_build_vars_default}" "${_group_name}" "${_pkg_name}"\
 	|| ! exp_pkg_env_defaults "${_build_steps_default}" "${_pkg_name}" "${_workdir}"; then
-		return "${?}";
+		return 1;
 	fi;
 };
 
diff --git a/subr/ex_pkg_exec.subr b/subr/ex_pkg_exec.subr
index 6fb333bb..9e4629ba 100644
--- a/subr/ex_pkg_exec.subr
+++ b/subr/ex_pkg_exec.subr
@@ -22,11 +22,11 @@ exp_pkg_exec_pre() {
 		if [ "${PKG_NO_CLEAN_BASE_DIR:-0}" -eq 0 ]\
 		&& ! rtl_fileop rm "${PKG_BASE_DIR}" "${PKG_BUILD_DIR}" "${PKG_DESTDIR}"\
 		|| ! rtl_fileop mkdir "${PKG_BASE_DIR}"; then
-			return "${?}";
+			return 1;
 		fi;
 		if ! rtl_fileop mkdir "${PKG_BUILD_DIR}" "${PKG_DESTDIR}"\
 		|| ! ex_pkg_state_set "${_pkg_name}" "start"; then
-			return "${?}";
+			return 1;
 		fi;
 	fi;
 	rtl_fileop cd "${PKG_BUILD_DIR}";
@@ -97,9 +97,11 @@ ex_pkg_exec() {
 				fi;
 			done;
 		fi;
-		if [ "${_rc:-0}" -eq 0 ]\
-		&& [ -z "${_restart_at}" ]; then
-			ex_pkg_state_set "${_pkg_name}" finish;
+		if [ "${_rc:-0}" -eq 0 ]; then
+			if [ -z "${_restart_at}" ]\
+			|| [ "${_restart_at}" = "ALL" ]; then
+				ex_pkg_state_set "${_pkg_name}" finish;
+			fi;
 		fi;
 	fi;
 	return "${_rc}";
diff --git a/subr/pkg_clean.subr b/subr/pkg_clean.subr
index b122823e..a7df7920 100644
--- a/subr/pkg_clean.subr
+++ b/subr/pkg_clean.subr
@@ -5,13 +5,19 @@
 pkg_clean() {
 	if [ "${PKG_NO_CLEAN:-0}" -eq 0 ]; then
 		if rtl_lmatch "${ARG_CLEAN_BUILDS}" "build" ","; then
-			rtl_fileop rm "${PKG_BUILD_DIR}" || return "${?}";
+			if ! rtl_fileop rm "${PKG_BUILD_DIR}"; then
+				return 1;
+			fi;
 		fi;
 		if rtl_lmatch "${ARG_CLEAN_BUILDS}" "dest" ","; then
-			rtl_fileop rm "${PKG_DESTDIR}" || return "${?}";
+			if ! rtl_fileop rm "${PKG_DESTDIR}"; then
+				return 1;
+			fi;
 		fi;
 		if rtl_lmatch "${ARG_CLEAN_BUILDS}" "src" ","; then
-			rtl_fileop rm "${PKG_BASE_DIR}/${PKG_SUBDIR}" || return "${?}";
+			if ! rtl_fileop rm "${PKG_BASE_DIR}/${PKG_SUBDIR}"; then
+				return 1;
+			fi;
 		fi;
 	fi;
 };
diff --git a/subr/pkg_configure.subr b/subr/pkg_configure.subr
index c6819886..974e708f 100644
--- a/subr/pkg_configure.subr
+++ b/subr/pkg_configure.subr
@@ -15,8 +15,8 @@ pkg_configure() {
 		LDFLAGS="${PKG_LDFLAGS_CONFIGURE}${PKG_LDFLAGS_CONFIGURE_EXTRA:+ ${PKG_LDFLAGS_CONFIGURE_EXTRA}}"	\
 		"${PKG_CONFIGURE}" ${PKG_CONFIGURE_ARGS} ${PKG_CONFIGURE_ARGS_EXTRA} ${PKG_CONFIGURE_ARGS_EXTRA_DEBUG}; _rc="${?}"
 		rtl_export_vars -u PKG_CONFIG "${PKG_PKG_CONFIG}" PKG_CONFIG_PATH "${PKG_PKG_CONFIG_PATH}" PYTHON "${PKG_PYTHON}";
+		return "${_rc}";
 	fi;
-	return "${?}";
 };
 
 # vim:filetype=sh
diff --git a/subr/pkg_configure_autotools.subr b/subr/pkg_configure_autotools.subr
index bc3b6c23..d28cc8e1 100644
--- a/subr/pkg_configure_autotools.subr
+++ b/subr/pkg_configure_autotools.subr
@@ -7,6 +7,10 @@ pkg_configure_autotools() {
 	if rtl_exists_any "${PKG_BASE_DIR}/${PKG_SUBDIR}"							\
 			"config.guess" "configure.ac" "configure.in" "configure";
 	then	rtl_export_vars PKG_CONFIG "${PKG_PKG_CONFIG}" PKG_CONFIG_PATH "${PKG_PKG_CONFIG_PATH}";
+		if [ "${PKG_FORCE_AUTORECONF:-0}" -eq 1 ]\
+		&& ! (cd "${PKG_BASE_DIR}/${PKG_SUBDIR}" && autoreconf -fiv); then
+			return 1;
+		fi;
 		if [ -e "${PKG_BASE_DIR}/${PKG_SUBDIR}/configure.ac" ]\
 		&& [ ! -e "${PKG_BASE_DIR}/${PKG_SUBDIR}/configure" ]; then
 			for _fname in bootstrap bootstrap.sh autogen.sh; do
@@ -15,16 +19,26 @@ pkg_configure_autotools() {
 							"${PKG_BASE_DIR}/${PKG_SUBDIR}/build-aux"		\
 							"${PKG_BASE_DIR}/${PKG_SUBDIR}";
 					do	if [ -e "${_subdir_tgt}" ]; then
-							rtl_fileop install -m 0700				\
-								"${MIDIPIX_BUILD_PWD}/etc/config.sub"		\
-								"${_subdir_tgt}/config.sub" || return "${?}" && break;
+							if ! rtl_fileop install -m 0700				\
+									"${MIDIPIX_BUILD_PWD}/etc/config.sub"	\
+									"${_subdir_tgt}/config.sub"; then
+								return 1;
+							else
+								break;
+							fi;
 						fi;
 					done;
-					(rtl_fileop cd "${PKG_BASE_DIR}/${PKG_SUBDIR}" &&			\
-						/bin/sh "${_fname}") || return "${?}" && break;
+					if ! (rtl_fileop cd "${PKG_BASE_DIR}/${PKG_SUBDIR}" &&			\
+							/bin/sh "${_fname}"); then
+						return 1;
+					else
+						break;
+					fi;
 				fi;
 			done;
-			(rtl_fileop cd "${PKG_BASE_DIR}/${PKG_SUBDIR}" && autoconf) || return "${?}";
+			if ! (rtl_fileop cd "${PKG_BASE_DIR}/${PKG_SUBDIR}" && autoconf); then
+				return 1;
+			fi;
 		fi;
 		for _fname in $(find "${PKG_BASE_DIR}/${PKG_SUBDIR}" -name config.sub); do
 			if ! rtl_fileop mv "${_fname}" "${_fname}.orig"\
@@ -39,10 +53,14 @@ pkg_configure_autotools() {
 						"${PKG_CONFIG_CACHE}"						\
 						"${PKG_CONFIG_CACHE_LOCAL}"					\
 						"${PKG_CONFIG_CACHE_EXTRA}";
-				do	echo "${_config_cache}"							|\
-						tr " " "\n" >> "${PKG_BUILD_DIR}/config.cache" || return "${?}";
+				do	if ! echo "${_config_cache}"						|\
+							tr " " "\n" >> "${PKG_BUILD_DIR}/config.cache"; then
+						return 1;
+					fi;
 				done;
-				sed -i"" "s,%PREFIX%,${PKG_PREFIX},g" "${PKG_BUILD_DIR}/config.cache" || return "${?}";
+				if ! sed -i"" "s,%PREFIX%,${PKG_PREFIX},g" "${PKG_BUILD_DIR}/config.cache"; then
+					return 1;
+				fi;
 			fi;
 		fi;
 		rtl_export_vars -u PKG_CONFIG "${PKG_PKG_CONFIG}" PKG_CONFIG_PATH "${PKG_PKG_CONFIG_PATH}";
diff --git a/subr/pkg_configure_patch.subr b/subr/pkg_configure_patch.subr
index 80690b67..88f3f3d1 100644
--- a/subr/pkg_configure_patch.subr
+++ b/subr/pkg_configure_patch.subr
@@ -13,8 +13,11 @@ pkg_configure_patch() {
 			${PKG_PATCHES_EXTRA}; do
 		if [ -r "${_patch_fname}" ]\
 		&& ! rtl_lmatch "${_patches_done}" "${_patch_fname}"; then
-			patch -b -d "${PKG_BASE_DIR}/${PKG_SUBDIR}" -p1 < "${_patch_fname}" || return "${?}";
-			_patches_done="$(rtl_lconcat "${_patches_done}" "${_patch_fname}")";
+			if ! patch -b -d "${PKG_BASE_DIR}/${PKG_SUBDIR}" -p1 < "${_patch_fname}"; then
+				set -o noglob; return 1;
+			else
+				_patches_done="$(rtl_lconcat "${_patches_done}" "${_patch_fname}")";
+			fi;
 		fi;
 	done; set -o noglob;
 };
diff --git a/subr/pkg_configure_patch_pre.subr b/subr/pkg_configure_patch_pre.subr
index 1c572efd..434b1cf7 100644
--- a/subr/pkg_configure_patch_pre.subr
+++ b/subr/pkg_configure_patch_pre.subr
@@ -7,8 +7,9 @@ pkgp_configure_patch_pre() {
 	for _patch_path in \
 			"${MIDIPIX_BUILD_PWD}/patches/${PKG_NAME}${PKG_VERSION:+-${PKG_VERSION}}_pre.local.patch"		\
 			"${MIDIPIX_BUILD_PWD}/patches/${PKG_NAME}${PKG_VERSION:+-${PKG_VERSION}}_pre.local@${BUILD_HNAME}.patch"; do
-		if [ -r "${_patch_path}" ]; then
-			patch -b -d "${PKG_BASE_DIR}/${PKG_SUBDIR}" -p1 < "${_patch_path}" || return "${?}";
+		if [ -r "${_patch_path}" ]\
+		&& ! patch -b -d "${PKG_BASE_DIR}/${PKG_SUBDIR}" -p1 < "${_patch_path}"; then
+			return 1;
 		fi;
 	done;
 };
@@ -17,8 +18,10 @@ pkgp_configure_patch_pre_chainport() {
 	local	_chainport_patch_fname="${BUILD_WORKDIR}/chainport/patches/${PKG_NAME%%_*}/${PKG_NAME%%_*}-${PKG_VERSION}.midipix.patch"\
 		_chainport_patch_dname="${PKG_BASE_DIR}/${PKG_SUBDIR}/patches/${PKG_NAME%%_*}" _oldpwd="";
 	if [ -e "${_chainport_patch_fname}" ]; then
-		rtl_fileop mkdir "${_chainport_patch_dname}" || return "${?}";
-		rtl_fileop cp "${_chainport_patch_fname}" "${_chainport_patch_dname}" || return "${?}";
+		if ! rtl_fileop mkdir "${_chainport_patch_dname}"\
+		|| ! rtl_fileop cp "${_chainport_patch_fname}" "${_chainport_patch_dname}"; then
+			return 1;
+		fi;
 	fi;
 };
 
diff --git a/subr/pkg_fetch_download.subr b/subr/pkg_fetch_download.subr
index a23b8b9d..126675ad 100644
--- a/subr/pkg_fetch_download.subr
+++ b/subr/pkg_fetch_download.subr
@@ -4,10 +4,14 @@
 
 pkg_fetch_download() {
 	if [ -n "${PKG_URL}" ]; then
-		rtl_fetch_url_wget "${PKG_URL}" "${PKG_SHA256SUM}" "${PKG_FNAME}" || return "${?}";
+		if ! rtl_fetch_url_wget "${PKG_URL}" "${PKG_SHA256SUM}" "${PKG_FNAME}"; then
+			return 1;
+		fi;
 	fi;
 	if [ -n "${PKG_URLS_GIT}" ]; then
-		rtl_fetch_urls_git "${PKG_BASE_DIR}" ${PKG_URLS_GIT} || return "${?}";
+		if ! rtl_fetch_urls_git "${PKG_BASE_DIR}" ${PKG_URLS_GIT}; then
+			return 1;
+		fi;
 	fi;
 };
 
diff --git a/subr/pkg_fetch_extract.subr b/subr/pkg_fetch_extract.subr
index 8802a950..eedd84ab 100644
--- a/subr/pkg_fetch_extract.subr
+++ b/subr/pkg_fetch_extract.subr
@@ -13,16 +13,24 @@ pkgp_fetch_extract_type() {
 
 pkg_fetch_extract() {
 	if [ -n "${PKG_URL}" ]; then
-		_oldpwd="${PWD}"; rtl_fileop cd "${PKG_BASE_DIR}" || return "${?}";
-		rtl_fileop rm "${PKG_BASE_DIR}/${PKG_SUBDIR}" || return "${?}";
-		case "$(pkgp_fetch_extract_type "${PKG_NAME}")" in
-		bz2)	bunzip2 -d < "${BUILD_DLCACHEDIR}/${PKG_FNAME}" | tar -C "${PKG_BASE_DIR}" -xf - || return "${?}"; ;;
-		gz)	gunzip -d < "${BUILD_DLCACHEDIR}/${PKG_FNAME}" | tar -C "${PKG_BASE_DIR}" -xf - || return "${?}"; ;;
-		lz)	lzip -d < "${BUILD_DLCACHEDIR}/${PKG_FNAME}" | tar -C "${PKG_BASE_DIR}" -xf - || return "${?}"; ;;
-		xz)	xz -d < "${BUILD_DLCACHEDIR}/${PKG_FNAME}" | tar -C "${PKG_BASE_DIR}" -xf - || return "${?}"; ;;
-		*)	tar -C "${PKG_BASE_DIR}" -xf "${BUILD_DLCACHEDIR}/${PKG_FNAME}" || return "${?}"; ;;
-		esac;
-		rtl_fileop cd "${_oldpwd}" || return "${?}";
+		_oldpwd="${PWD}";
+		if ! rtl_fileop cd "${PKG_BASE_DIR}"\
+		|| ! rtl_fileop rm "${PKG_BASE_DIR}/${PKG_SUBDIR}"; then
+			rtl_fileop cd "${_oldpwd}"; return 1;
+		else
+			case "$(pkgp_fetch_extract_type "${PKG_NAME}")" in
+			bz2)	bunzip2 -d < "${BUILD_DLCACHEDIR}/${PKG_FNAME}" | tar -C "${PKG_BASE_DIR}" -xf -; ;;
+			gz)	gunzip -d < "${BUILD_DLCACHEDIR}/${PKG_FNAME}" | tar -C "${PKG_BASE_DIR}" -xf -; ;;
+			lz)	lzip -d < "${BUILD_DLCACHEDIR}/${PKG_FNAME}" | tar -C "${PKG_BASE_DIR}" -xf -; ;;
+			xz)	xz -d < "${BUILD_DLCACHEDIR}/${PKG_FNAME}" | tar -C "${PKG_BASE_DIR}" -xf -; ;;
+			*)	tar -C "${PKG_BASE_DIR}" -xf "${BUILD_DLCACHEDIR}/${PKG_FNAME}"; ;;
+			esac;
+			if [ "${?}" -ne 0 ]; then
+				rtl_fileop cd "${_oldpwd}"; return 1;
+			else
+				rtl_fileop cd "${_oldpwd}";
+			fi;
+		fi;
 	fi;
 };
 
diff --git a/subr/pkg_install.subr b/subr/pkg_install.subr
index 87182d9c..4afd0750 100644
--- a/subr/pkg_install.subr
+++ b/subr/pkg_install.subr
@@ -3,24 +3,40 @@
 #
 
 pkg_install() {
-	local _pkglist_name="";
-	if ! rtl_fileop mkdir "${PKG_PREFIX}"\
-	|| ! find "${PKG_DESTDIR}" -type d -exec chmod 0755 {} \;\
-	|| ! find "${PKG_DESTDIR}" \( -not -perm /0111 \) -type f -exec chmod 0644 {} \;\
-	|| ! find "${PKG_DESTDIR}" -perm /0111 -type f -exec chmod 0755 {} \;\
-	|| ! tar -C "${PKG_DESTDIR}" -cpf - . | tar -C "${PKG_PREFIX}" --overwrite -xpf -; then
-		return "${?}";
-	else
-		if rtl_lmatch "${ARG_DIST}" "pkg" ","; then
-			tar -C "${PKG_DESTDIR}" -cpf - . |\
-				gzip -c -9 - > "${PKG_BASE_DIR}/${PKG_NAME}.tgz" || return "${?}";
-		fi;
-		if [ "${PKG_PKGLIST_DISABLE:-0}" -eq 0 ]; then
-			if [ ! -e "${PREFIX}/pkglist.${PKG_BUILD_TYPE}" ]; then
-				touch "${PREFIX}/pkglist.${PKG_BUILD_TYPE}" || return "${?}";
+	local _fname="" _ifs_old="${IFS}" _pkglist_name="" IFS;
+	if ! rtl_fileop mkdir "${PKG_PREFIX}"; then
+		return 1;
+	else	IFS="
+";		for _fname in $(find "${PKG_DESTDIR}" -type d); do
+			if ! rtl_fileop chmod 0755 "${_fname}"; then
+				return 1;
+			fi;
+		done;
+		for _fname in $(find "${PKG_DESTDIR}" \( -not -perm /0111 \) -type f); do
+			if ! rtl_fileop chmod 0644 "${_fname}"; then
+				return 1;
+			fi;
+		done;
+		for _fname in $(find "${PKG_DESTDIR}" -perm /0111 -type f); do
+			if ! rtl_fileop chmod 0755 "${_fname}"; then
+				return 1;
+			fi;
+		done; IFS="${_ifs_old}";
+		if ! tar -C "${PKG_DESTDIR}" -cpf - . | tar -C "${PKG_PREFIX}" --overwrite -xpf -; then
+			return 1;
+		elif rtl_lmatch "${ARG_DIST}" "pkg" ","\
+		&& ! tar -C "${PKG_DESTDIR}" -cpf - . | gzip -c -9 - > "${PKG_BASE_DIR}/${PKG_NAME}.tgz"; then
+			return 1;
+		elif [ "${PKG_PKGLIST_DISABLE:-0}" -eq 0 ]; then
+			if [ ! -e "${PREFIX}/pkglist.${PKG_BUILD_TYPE}" ]\
+			&& ! touch "${PREFIX}/pkglist.${PKG_BUILD_TYPE}"; then
+				return 1;
+			else
+				_pkglist_name="${PKG_BASE_DIR##*/}"; _pkglist_name="${_pkglist_name%%-*}";
+				if ! echo "${_pkglist_name}" >> "${PREFIX}/pkglist.${PKG_BUILD_TYPE}"; then
+					return 1;
+				fi;
 			fi;
-			_pkglist_name="${PKG_BASE_DIR##*/}"; _pkglist_name="${_pkglist_name%%-*}";
-			echo "${_pkglist_name}" >> "${PREFIX}/pkglist.${PKG_BUILD_TYPE}" || return "${?}";
 		fi;
 	fi;
 };
diff --git a/subr/pkg_install_files.subr b/subr/pkg_install_files.subr
index 5a4d9708..362f4926 100644
--- a/subr/pkg_install_files.subr
+++ b/subr/pkg_install_files.subr
@@ -4,17 +4,20 @@
 
 pkgp_install_files() {
 	if [ -n "${PKG_INSTALL_FILES}" ]; then
-		rtl_install -v "${PKG_DESTDIR}" ${PKG_INSTALL_FILES} || return "${?}";
+		if ! rtl_install -v "${PKG_DESTDIR}" ${PKG_INSTALL_FILES}; then
+			return 1;
+		fi;
 	fi;
 };
 
 pkgp_install_files_pkgconfig() {
 	local _pc_path="";
 	for _pc_path in $(find "${PKG_DESTDIR}" -name \*.pc); do
-		if grep -Eq '^libdir=[^$]+$' "${_pc_path}"; then
-			sed -i"" -e '/^libdir=[^$]\+$/s/^libdir=\(.\+\)$/libdir=${exec_prefix}\1/'	\
+		if grep -Eq '^libdir=[^$]+$' "${_pc_path}"\
+		&& ! sed -i""	-e '/^libdir=[^$]\+$/s/^libdir=\(.\+\)$/libdir=${exec_prefix}\1/'	\
 				-e '/^exec_prefix=$/s/^.*$/exec_prefix=${prefix}/'			\
-					"${_pc_path}" || return "${?}";
+				"${_pc_path}"; then
+			return 1;
 		fi;
 	done;
 };
@@ -31,7 +34,9 @@ pkgp_install_files_strip() {
 		for _bin_path in $(find "${_tree_root}" -perm /a=x -type f); do
 			if objdump -sj .debug_info "${_bin_path}" >/dev/null 2>&1; then
 				rtl_log_msg info "Stripping ${_bin_path}...";
-				"${PKG_TARGET}-strip" "${_bin_path}" || return "${?}";
+				if ! "${PKG_TARGET}-strip" "${_bin_path}"; then
+					return 1;
+				fi;
 			fi;
 		done;
 	fi;
@@ -41,7 +46,7 @@ pkg_install_files() {
 	if ! pkgp_install_files\
 	|| ! pkgp_install_files_pkgconfig\
 	|| ! pkgp_install_files_strip; then
-		return "${?}";
+		return 1;
 	fi;
 };
 
diff --git a/subr/pkg_install_libs.subr b/subr/pkg_install_libs.subr
index a00f15bb..76c7bfdb 100644
--- a/subr/pkg_install_libs.subr
+++ b/subr/pkg_install_libs.subr
@@ -5,7 +5,9 @@
 pkgp_install_libs_purge_la() {
 	local _la_path="";
 	for _la_path in $(find "${PKG_DESTDIR}" -type f -name \*.la); do
-		rtl_fileop rm "${_la_path}" || return "${?}";
+		if ! rtl_fileop rm "${_la_path}"; then
+			return 1;
+		fi;
 	done;
 };
 
@@ -25,7 +27,7 @@ pkgp_install_libs_shared() {
 	local _lib_dst_path="" _lib_name="" _lib_src_path="" _so_dst_dir="" _so_src_path="";
 	if [ "${PKG_BUILD_TYPE}" != "host" ]; then
 		for _so_src_path in \
-			$(find	"${PKG_DESTDIR}"							  \
+			$(find	"${PKG_DESTDIR}"							  	\
 				\(  -name "*.so" -or -name "*.so.*" \) -print);
 		do	if [ "$(readlink -f "${_so_path}")" != "/dev/null" ]\
 			&& [ -z "$(rtl_head "[0-9.]" "${_so_src_path##*.so}")" ]; then
@@ -38,13 +40,17 @@ pkgp_install_libs_shared() {
 				_lib_dst_path="${_so_dst_dir}/${_lib_name}";
 				if [ ! -L "${_lib_src_path}" ]\
 				&& [ ! -e "${_lib_dst_path}" ]; then
-					(rtl_fileop cd "$(rtl_dirname "${_so_src_path}")" 	&&\
-					perk -e "$(rtl_basename "${_so_src_path}")"			 |\
-						"${PKG_TARGET}-mdso"					  \
-							-i "$(rtl_basename "${_lib_dst_path}")"	  \
-							-n "$(rtl_basename "${_so_src_path}")" -) || return "${?}";
+					if ! (rtl_fileop cd "$(rtl_dirname "${_so_src_path}")" 	&&		\
+							perk -e "$(rtl_basename "${_so_src_path}")"		|\
+								"${PKG_TARGET}-mdso"				\
+									-i "$(rtl_basename "${_lib_dst_path}")"	\
+									-n "$(rtl_basename "${_so_src_path}")" -); then
+						return 1;
+					fi;
+				fi;
+				if ! pkgp_install_libs_shared_link "${_lib_name}" "${_so_dst_dir}" "${_so_src_path}"; then
+					return 1;
 				fi;
-				pkgp_install_libs_shared_link "${_lib_name}" "${_so_dst_dir}" "${_so_src_path}" || return "${?}";
 			fi;
 		done;
 	fi;
diff --git a/subr/pkg_install_rpm.subr b/subr/pkg_install_rpm.subr
index ae76ac70..6cc373ff 100644
--- a/subr/pkg_install_rpm.subr
+++ b/subr/pkg_install_rpm.subr
@@ -36,14 +36,14 @@ pkg_install_rpm() {
 				elif [ "${_rc}" -eq 141 ]; then
 					continue;
 				else
-					return "${?}";
+					return "${_rc}";
 				fi;
 			done;
 			if ! find "${PREFIX_RPM}/${PKG_NAME}-${_pkg_version_rpm}/RPMS"				\
 				-iname \*.rpm -exec cp -pP {} "${PREFIX_RPM}/" \;				\
 			|| ! rtl_fileop rm "${PREFIX_RPM}/${PKG_NAME}-${_pkg_version_rpm}"			\
 			|| ! rtl_fileop cp "${PKG_BASE_DIR}/${PKG_NAME}-${_pkg_version_rpm}.spec" "${PREFIX_RPM}/"; then
-				return "${?}";
+				return 1;
 			fi;
 		fi;
 	fi;
diff --git a/subr/pkg_install_subdirs.subr b/subr/pkg_install_subdirs.subr
index 94557586..8e6e0429 100644
--- a/subr/pkg_install_subdirs.subr
+++ b/subr/pkg_install_subdirs.subr
@@ -7,11 +7,14 @@ pkg_install_subdirs() {
 	for _spec in \
 			"${PKG_INSTALL_FILES_DESTDIR}"		\
 			"${PKG_INSTALL_FILES_DESTDIR_EXTRA}"; do
-		rtl_install "${PKG_DESTDIR}" ${_spec} || return "${?}";
+		if ! rtl_install "${PKG_DESTDIR}" ${_spec}; then
+			return 1;
+		fi;
 	done;
 	if [ "${PKG_PREFIX%/}" = "${PREFIX_NATIVE%/}" ]; then
-		rtl_install					\
-			"${PKG_DESTDIR}/${DEFAULT_TARGET}" ${PKG_INSTALL_FILES_DESTDIR} || return "${?}";
+		if ! rtl_install "${PKG_DESTDIR}/${DEFAULT_TARGET}" ${PKG_INSTALL_FILES_DESTDIR}; then
+			return 1;
+		fi;
 	fi;
 };
 
diff --git a/subr/rtl_complex.subr b/subr/rtl_complex.subr
index 8370a4cf..e727e3cd 100644
--- a/subr/rtl_complex.subr
+++ b/subr/rtl_complex.subr
@@ -21,7 +21,7 @@ rtl_clean_env() {
 	for _env_var in ${_env_vars}; do
 		if [ "${_env_var#DEFAULT_}" != "${_env_var}" ]\
 		|| [ "${_env_var#PKG_}" != "${_env_var}" ]; then
-			_env_vars_except="${_env_vars_except:+${_env_vars_except} }${_env_var}";
+			_env_vars_except="$(rtl_lconcat "${_env_vars_except}" "${_env_var}")";
 		fi;
 	done;
 	rtl_unset_vars $(rtl_lfilter "${_env_vars}" "${_env_vars_except}");
@@ -107,12 +107,12 @@ rtl_set_vars() {
 		_vval_src="$(rtl_get_var_unsafe "${_vname_src}")";
 		if [ -n "${_vval_src}" ]; then
 			rtl_set_var_unsafe "PKG_${_vname_dst}" "${_vval_src}";
-			_vars_set_tmp="${_vars_set_tmp:+${_vars_set_tmp} }PKG_${_vname_dst}";
+			_vars_set_tmp="$(rtl_lconcat "${_vars_set_tmp}" "PKG_${_vname_dst}")";
 		fi;
 	done;
 	_vars_set_old="$(rtl_get_var_unsafe "${_vars_set_vname}")";
 	rtl_set_var_unsafe "${_vars_set_vname}"					\
-		"${_vars_set_old:+${_vars_set_old} }${_vars_set_tmp}";
+		"$(rtl_lconcat "${_vars_set_old}" "${_vars_set_tmp}")";
 };
 
 # vim:filetype=sh
diff --git a/subr/rtl_fetch.subr b/subr/rtl_fetch.subr
index d61d7858..3afd30dc 100644
--- a/subr/rtl_fetch.subr
+++ b/subr/rtl_fetch.subr
@@ -36,7 +36,7 @@ exp_rtl_fetch_url_git() {
 	if [ "${?}" -eq 0 ]; then
 		cd "$(pwd)";
 	else
-		return "${?}";
+		return 1;
 	fi;
 };
 
diff --git a/subr/rtl_fileop.subr b/subr/rtl_fileop.subr
index cc861787..c2b403fa 100644
--- a/subr/rtl_fileop.subr
+++ b/subr/rtl_fileop.subr
@@ -10,7 +10,7 @@ exp_rtl_fileop_check() {
 };
 
 rtl_fileop() {
-	local _op="${1}" _dst="" _install_args="" _rc=0 _src=""; shift;
+	local _op="${1}" _dst="" _mode="" _install_args="" _owner="" _rc=0 _src=""; shift;
 	case "${_op}" in
 	cd)	if [ \( -z "${1}" \) -o ! \( -L "${1}" -o -e "${1}" \) ]; then
 			rtl_log_msg failexit "Invalid or non-existent directory \`${1}'.";
@@ -18,6 +18,20 @@ rtl_fileop() {
 			rtl_log_msg vvvv "Changing working directory to \`${1}'.";
 			cd -- "${1}"; _rc="${?}";
 		fi; ;;
+	chmod)	if [ "${#}" -lt 2 ]; then
+			rtl_log_msg failexit "Missing parameters (in: chmod ${*}.)";
+		elif _mode="${1}" && shift\
+		&&   exp_rtl_fileop_check "${PREFIX}" "${*}"; then
+			rtl_log_msg vvvv "Changing file mode bits of \`${*}' to \`${_mode}'.";
+			chmod -- "${_mode}" "${@}"; _rc="${?}";
+		fi; ;;
+	chown)	if [ "${#}" -lt 2 ]; then
+			rtl_log_msg failexit "Missing parameters (in: chown ${*}.)";
+		elif _owner="${1}" && shift\
+		&&   exp_rtl_fileop_check "${PREFIX}" "${*}"; then
+			rtl_log_msg vvvv "Changing file owner of \`${*}' to \`${_owner}'.";
+			chown -- "${_owner}" "${@}"; _rc="${?}";
+		fi; ;;
 	cp_follow)
 		if [ "${#}" -lt 2 ]; then
 			rtl_log_msg failexit "Missing parameters (in: cp_follow ${*}.)";