don't unnecessarily convert exit codes to strings

Closes: #952861

functions/arguments.sh

@@ -12,7 +12,7 @@ Arguments ()
 {
 	ARGUMENTS="$(getopt --longoptions breakpoints,color,conffile:,debug,force,help,quiet,usage,verbose,version --name=${PROGRAM} --options c:huv --shell sh -- "${@}")"
 
-	if [ "${?}" != "0" ]
+	if [ $? -ne 0 ]
 	then
 		Echo_error "terminating" >&2
 		exit 1

functions/chroot.sh

@@ -34,7 +34,7 @@ Chroot ()
 
 	${_LINUX32} chroot "${CHROOT}" /usr/bin/env -i HOME="/root" PATH="/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin" TERM="${TERM}" DEBIAN_FRONTEND="${LB_DEBCONF_FRONTEND}" DEBIAN_PRIORITY="${LB_DEBCONF_PRIORITY}" DEBCONF_NONINTERACTIVE_SEEN="true" DEBCONF_NOWARNINGS="true" ${ENV} ${COMMANDS}
 
-	return "${?}"
+	return ${?}
 }
 
 Chroot_has_package() {

functions/echo.sh

@@ -149,11 +149,11 @@ Echo_warning ()
 
 Echo_status ()
 {
-	__RETURN="${?}"
+	__RETURN=$?
 
 	if [ "${_COLOR}" = "false" ]
 	then
-		if [ "${__RETURN}" = "0" ]
+		if [ $__RETURN -eq 0 ]
 		then
 			printf " done.\n"
 		else
@@ -162,7 +162,7 @@ Echo_status ()
 	else
 		Cursor_columns_backward 8
 
-		if [ "${__RETURN}" = "0" ]
+		if [ $__RETURN -eq 0 ]
 		then
 			printf " ${GREEN}done${NO_COLOR}.  \n"
 		else

functions/exit.sh

@@ -10,7 +10,7 @@
 
 Exit ()
 {
-	VALUE="${?}"
+	VALUE=$?
 
 	if [ "${_DEBUG}" = "true" ]
 	then

scripts/build/config

@@ -166,8 +166,7 @@ Local_arguments ()
 	LONG_OPTIONS="$(echo ${LONG_OPTIONS} | tr -d ' ')"
 	ARGUMENTS="$(getopt --longoptions ${LONG_OPTIONS} --name="${PROGRAM}" --options a:d:m:k:b:s:c:huv --shell sh -- "${@}")"
 
-	if [ "${?}" != "0" ]
-	then
+	if [ $? -ne 0 ]; then
 		Echo_error "terminating" >&2
 		exit 1
 	fi