Function unix_flock

umu/umu_util.py:50–62

Create a file and configure it to be locking.

(path: str)

@contextmanager
def unix_flock(path: str):
    """Create a file and configure it to be locking."""
    fd: int | None = None

    try:
        fd = os.open(path, os.O_CREAT | os.O_WRONLY, 0o644)
        # See https://man7.org/linux/man-pages/man2/flock.2.html
        flock(fd, LOCK_EX)
        yield fd
    finally:
        if fd is not None:
            flock(fd, LOCK_UN)
            os.close(fd)


@contextmanager