Fix edge case where unix history path is a directory

dissect/target/plugins/os/unix/history.py

@@ -52,7 +52,7 @@ def _find_history_files(self) -> List[Tuple[str, TargetPath, UnixUserRecord]]:
         for user_details in self.target.user_details.all_with_home():
             for shell, history_relative_path in self.COMMAND_HISTORY_RELATIVE_PATHS:
                 history_path = user_details.home_path.joinpath(history_relative_path)
-                if history_path.exists():
+                if history_path.is_file():
                     history_files.append((shell, history_path, user_details.user))
         return history_files
 

tests/plugins/os/unix/test_history.py

@@ -5,6 +5,8 @@
 from dissect.util.ts import from_unix
 from flow.record.fieldtypes import datetime as dt
 
+from dissect.target import Target
+from dissect.target.filesystem import VirtualFilesystem
 from dissect.target.plugins.os.unix.history import CommandHistoryPlugin
 
 
@@ -214,3 +216,22 @@ def test_commandhistory_database_history(target_unix_users, fs_unix, db_type, db
         assert results[i].command == line
         assert results[i].shell == db_type
         assert results[i].source.as_posix() == f"/root/{db_file}"
+
+
+def test_commandhistory_is_directory(target_unix_users: Target, fs_unix: VirtualFilesystem) -> None:
+    commandhistory_data = """test"""
+
+    fs_unix.map_file_fh(
+        "/root/.zsh_history",
+        BytesIO(textwrap.dedent(commandhistory_data).encode()),
+    )
+
+    fs_unix.makedirs("/root/.bash_history")
+    results = list(target_unix_users.commandhistory())
+
+    assert len(results) == 1
+
+    assert results[0].ts is None
+    assert results[0].command == "test"
+    assert results[0].shell == "zsh"
+    assert results[0].source.as_posix() == "/root/.zsh_history"