Function _rmtree_safe_fd

Lib/shutil.py:714–731

(path, dir_fd, onexc)

# Version using fd-based APIs to protect against races
def _rmtree_safe_fd(path, dir_fd, onexc):
    # While the unsafe rmtree works fine on bytes, the fd based does not.
    if isinstance(path, bytes):
        path = os.fsdecode(path)
    stack = [(os.lstat, dir_fd, path, None)]
    try:
        while stack:
            _rmtree_safe_fd_step(stack, onexc)
    finally:
        # Close any file descriptors still on the stack.
        while stack:
            func, fd, path, entry = stack.pop()
            if func is not os.close:
                continue
            try:
                os.close(fd)
            except OSError as err:
                onexc(os.close, path, err)

def _rmtree_safe_fd_step(stack, onexc):
    # Each stack item has four elements: