fixes

bash/mount.sh

@@ -9,7 +9,7 @@ mo() {
 			mkdir {lower,upper,work,mount}
 			if mount "${file}" "lower" ; then
 				mount \
-					-o lowerdir="lower",upperdir="upper",workdir="work"
+					-o lowerdir="lower",upperdir="upper",workdir="work" \
 					-t "overlay" \
 					"overlay" "mount"
 			fi
@@ -72,9 +72,9 @@ um() {
 ms() {
 	local directory="${1}"
 	local level="${2}"
-	if [ "${directory}" ] ; then
+	if [ -n "${directory}" ] ; then
 		if mkdir "${directory}" ; then
-			[ "${level}" ] || level="18"
+			[ -n "${level}" ] || level="18"
 			cp overlay/mount/{vmlinuz,initrd.img} "${directory}"
 			mksquashfs \
 				"overlay/mount" "${directory}/filesystem.squashfs" \

bash/rescue.sh

@@ -73,7 +73,7 @@ rescue_install() {
 rescue_upload() {
 	local host="${1}"
 	local hostname="${2}"
-	if [ "${hostname}" ]; then
+	if [ -n "${hostname}" ]; then
 		local user="root"
 		#
 		local user_host="${user}@${host}"

bash/util.sh

@@ -13,7 +13,7 @@ read_passphrase() {
 read_secret() {
 	local prompt="${1}"
 	local secret
-	printf "${prompt}" 1>&2
+	printf "%s" "${prompt}" 1>&2
 	read -r -s secret
 	echo >&2
 	echo "${secret}"