fix(extractor): do not set permission on symlink

fix_permission is called before fix_symlink, hence the symlink might be an
absolute target and setting an permission would fail, so we should ignore
setting permission on symlink.

Setting follow_symlinks=False on chmod() would be a solution, but not all
platforms support it as of now.

Ignoring permission setting on the target is ok, as that would be taken care
separately.

Author: martonilles

unblob/extractor.py

@@ -23,6 +23,9 @@ def carve_chunk_to_file(carve_path: Path, file: File, chunk: Chunk):
 
 
 def fix_permission(path: Path):
+    if path.is_symlink():
+        return
+
     if path.is_file():
         path.chmod(0o644)
     elif path.is_dir():