licunlong added the comment:
But one more question.
Please take a look at fd.py. In this file, we first close fd 0, then open
/dev/null as fd_null, and dump fd_null to fd 0. After we fork new process, this
fd 0 `is` inherited.
This seems to be a bug?
--
nosy: +Geass-LL
licunlong added the comment:
> File descriptors 0, 1, 2 are special: stdin, stdout and stderr file
> descriptors. You should use stdin, stdout, and stderr parameter of subprocess.
I finally find why `fd 0` is inherited. The reason is that os.dup2() has a
parameter "inherit
