[Python-Dev] Use function names instead of functions for os.supports_dir_fd?

[Victor Stinner]

Hi,

Python 3.3 introduced os.supports_dir_fd to check if some os functions
do accept a file descriptor instead of a path. The problem is that
os.supports_dir_fd is a list of functions, not a list of function
names. If os functions are monkey patched, you cannot test anymore if
a function supports file descriptor.

Monkey patching is a common practice in Python. test_os.py replaces
os.exec*() functions temporary for example.

It's also inconsistent with the new time.get_clock_info() function
which expects the name of a time function, not the function directly.

Victor