backups: fix various mount issues

src/mounts.js

@@ -26,7 +26,8 @@ function validateMountOptions(type, options) {
     assert.strictEqual(typeof options, 'object');
 
     switch (type) {
-    case 'noop':
+    case 'noop': // volume provider
+    case 'mountpoint': // backup provider
         return null;
     case 'cifs':
         if (typeof options.username !== 'string') return new BoxError(BoxError.BAD_FIELD, 'username is not a string');
@@ -92,7 +93,7 @@ async function getStatus(mountType, hostPath) {
     assert.strictEqual(typeof mountType, 'string');
     assert.strictEqual(typeof hostPath, 'string');
 
-    if (mountType === 'noop') {
+    if (mountType === 'noop' || mountType === 'mountpoint') { // noop is from volume provider and mountpoint is from backup provider
         if (safe.child_process.execSync(`mountpoint -q -- ${hostPath}`, { encoding: 'utf8' })) {
             return { state: 'active', message: 'Mounted' };
         } else {
@@ -112,7 +113,7 @@ async function getStatus(mountType, hostPath) {
             const idx = rlines.findIndex(l => l.startsWith('mount ') || l.startsWith('mount.'));
             if (idx !== -1) message = rlines[idx];
         }
-        if (!message) message = `Could not determine failure reason: ${safe.error.message}`;
+        if (!message) message = `Could not determine failure reason. ${safe.error ? safe.error.message : ''}`;
     } else {
         message = 'Mounted';
     }