From 6a6fa3a3682161fea7e5f829281f4614c2075c09 Mon Sep 17 00:00:00 2001
From: Joachim Metz <joachim.metz@gmail.com>
Date: Tue, 9 Aug 2022 22:33:12 +0200
Subject: [PATCH] Added fsfat back-end #580

---
 dfvfs/helpers/source_scanner.py | 3 ++-
 dfvfs/path/fat_path_spec.py     | 4 ++--
 dfvfs/vfs/fat_file_entry.py     | 6 ++++++
 3 files changed, 10 insertions(+), 3 deletions(-)

diff --git a/dfvfs/helpers/source_scanner.py b/dfvfs/helpers/source_scanner.py
index 24cb9166..ddd9ab90 100644
--- a/dfvfs/helpers/source_scanner.py
+++ b/dfvfs/helpers/source_scanner.py
@@ -718,7 +718,8 @@ def ScanForFileSystem(self, source_path_spec):
             'Unsupported source found more than one file system types.')
 
     # TODO: determine root location from file system or path specification.
-    if type_indicator == definitions.TYPE_INDICATOR_NTFS:
+    if type_indicator in (
+        definitions.TYPE_INDICATOR_FAT, definitions.TYPE_INDICATOR_NTFS):
       root_location = '\\'
     else:
       root_location = '/'
diff --git a/dfvfs/path/fat_path_spec.py b/dfvfs/path/fat_path_spec.py
index fba77283..ce037101 100644
--- a/dfvfs/path/fat_path_spec.py
+++ b/dfvfs/path/fat_path_spec.py
@@ -10,7 +10,7 @@ class FATPathSpec(path_spec.PathSpec):
   """FAT path specification implementation.
 
   Attributes:
-    identifier (int): catalog node identifier (CNID).
+    identifier (int): (virtual) identifier.
     location (str): location.
   """
 
@@ -23,7 +23,7 @@ def __init__(
     Note that an FAT path specification must have a parent.
 
     Args:
-      identifier (Optional[int]): catalog node identifier (CNID).
+      identifier (Optional[int]): (virtual) identifier.
       location (Optional[str]): location.
       parent (Optional[PathSpec]): parent path specification.
 
diff --git a/dfvfs/vfs/fat_file_entry.py b/dfvfs/vfs/fat_file_entry.py
index 3e735c8a..6916cd9d 100644
--- a/dfvfs/vfs/fat_file_entry.py
+++ b/dfvfs/vfs/fat_file_entry.py
@@ -116,6 +116,9 @@ def access_time(self):
   def creation_time(self):
     """dfdatetime.DateTimeValues: creation time or None if not available."""
     timestamp = self._fsfat_file_entry.get_creation_time_as_integer()
+    if timestamp is None:
+      return None
+
     return dfdatetime_fat_date_time.FATTimestamp(timestamp=timestamp)
 
   @property
@@ -127,6 +130,9 @@ def name(self):
   def modification_time(self):
     """dfdatetime.DateTimeValues: modification time or None if not available."""
     timestamp = self._fsfat_file_entry.get_modification_time_as_integer()
+    if timestamp is None:
+      return None
+
     return dfdatetime_fat_date_time.FATTimestamp(timestamp=timestamp)
 
   @property