Permission error handling

Author: matteius

src/pythonfinder/finders/system_finder.py

@@ -57,7 +57,12 @@ def __init__(
         venv = os.environ.get("VIRTUAL_ENV")
         if venv:
             bin_dir = "Scripts" if os.name == "nt" else "bin"
-            venv_path = Path(venv).resolve() / bin_dir
+            try:
+                venv_path = Path(venv).resolve() / bin_dir
+            except (PermissionError, OSError):
+                # resolve() can raise PermissionError on Windows for restricted
+                # system directories; fall back to a non-resolving join.
+                venv_path = Path(venv) / bin_dir
 
             # For Windows tests with Unix-style paths
             if os.name == "nt" and str(venv).startswith("/"):

src/pythonfinder/utils/path_utils.py

@@ -238,11 +238,14 @@ def exists_and_is_accessible(path: Path) -> bool:
     """
     try:
         return path.exists()
-    except PermissionError as pe:
-        if pe.errno == errno.EACCES:  # Permission denied
-            return False
-        else:
-            raise
+    except PermissionError:
+        # Treat any permission-denied error (including Windows WinError 5) as
+        # inaccessible rather than crashing.
+        return False
+    except OSError:
+        # Catch other OS-level errors (e.g. Windows ERROR_ACCESS_DENIED variants
+        # that may surface as OSError rather than PermissionError).
+        return False
 
 
 def is_in_path(path: str | Path, parent_path: str | Path) -> bool: