mo

shell/mount.sh

@@ -1,26 +1,39 @@
 mo() {
 	local root="${1}"
-	local directory file
-	if [ -n "${root}" ]; then
-		root="$(realpath "${root}")"
-		file="${root}/filesystem.squashfs"
-		if mkdir "overlay"; then
-			cd "overlay"
-			for directory in "lower" "upper" "work" "mount"; do
-				mkdir "${directory}"
-			done
-			if mount "${file}" "lower"; then
-				mount \
-					-o lowerdir="lower",upperdir="upper",workdir="work" \
-					-t "overlay" \
-					"overlay" "mount"
-			fi
-			cd ..
-		fi
-	else
-		log_fatal "No root"
+	if [ -z "${root}" ]; then
+		log_error "No root"
 		return 1
 	fi
+	root="$(realpath "${root}")"
+	if ! mkdir "overlay"; then
+		log_error "Unable to make mount directory"
+		return 2
+	fi
+	{
+		if ! cd "overlay"; then
+			log_error "Unable to move into mount directory"
+			return 3
+		fi
+		local directory
+		for directory in "lower" "upper" "work" "mount"; do
+			if ! mkdir --parents "${directory}"; then
+				log_error "Unable to move into: ${directory}"
+				return 4
+			fi
+		done
+		local file="${root}/filesystem.squashfs"
+		if ! mount "${file}" "lower"; then
+			log_error "Unable to mount: ${file}"
+			return 5
+		fi
+		if ! mount \
+			-o "lowerdir=lower,upperdir=upper,workdir=work" \
+			-t "overlay" \
+			"overlay" "mount"; then
+			log_error "Unable to mount: ${file}"
+			return 6
+		fi
+	}
 }
 
 uo() {