mount_secrets() {
     expect_min_n_args 1 "(device name, e.g. 'sda')" "$@"
     SECRETS_DEV=$1
+    if [ -z "${SECRETS_DEV}" ]; then
+        abort "Aborting due to empty device argument."
+    fi
     PATH_MOUNTED_SECRETS="${PATH_MEDIA}/${SECRETS_DEV}/${PATH_REL_SECRETS}"
     PATH_DEV="/dev/${SECRETS_DEV}"
     PATH_PMOUNT_ERR="$(path_tmp_timestamped 'err_mount')"
         if [ "${RESULT}" = "0" ]; then
             break
         elif [ "${RESULT}" != "100" ]; then
-       PMOUNT_ERR="$(cat ${PATH_PMOUNT_ERR})"
-       rm "${PATH_PMOUNT_ERR}"
+        PMOUNT_ERR="$(cat ${PATH_PMOUNT_ERR})"
+        rm "${PATH_PMOUNT_ERR}"
             abort "Aborting due to pmount error: ${PMOUNT_ERR}"
         fi
     done