# translation.check_str_without_nul

- name: check_str_without_nul
- description: Forbid NUL chars in strings in some external function calls
- option type: boolean option
- default: False

If turned on, the annotator will keep track of which strings can potentially contain NUL characters, and complain if one such string is passed to some external functions — e.g. if it is used as a filename in os.open(). Defaults to False because it is usually more pain than benefit, but turned on by targetpypystandalone.