util.make_dir: 0o700 permissions on folders (#4357)

lib/util.py

@@ -30,6 +30,7 @@ import traceback
 import urllib
 import threading
 import hmac
+import stat
 
 from .i18n import _
 
@@ -880,3 +881,12 @@ def export_meta(meta, fileName):
     except (IOError, os.error) as e:
         traceback.print_exc(file=sys.stderr)
         raise FileExportFailed(e)
+
+
+def make_dir(path, allow_symlink=True):
+    """Make directory if it does not yet exist."""
+    if not os.path.exists(path):
+        if not allow_symlink and os.path.islink(path):
+            raise Exception('Dangling link: ' + path)
+        os.mkdir(path)
+        os.chmod(path, stat.S_IRUSR | stat.S_IWUSR | stat.S_IXUSR)