Question

How can I tell the file (or tty) that is attached to my stdios?

Something like:

>>> import sys
>>> print sys.stdin.__path__
'/dev/tty1'
>>>

I could look in proc:

import os, sys
os.readlink('/proc/self/fd/%s' % sys.stdin.fileno())

But seems like there should be a builtin way?

Answer 1

Got it!

>>> import os
>>> import sys
>>> print os.ttyname(sys.stdin.fileno())
'/dev/pts/0'
>>>

It raises OSError: [Errno 22] Invalid argument if stdin isn’t a TTY; but thats easy enough to test for with isatty()