ForkProcess: replace os.fork with multiprocessing.Process (bug 730192)
Replace os.fork with multiprocessing.Process, in order to leverage
any pre-fork and post-fork interpreter housekeeping that it provides,
promoting a healthy state for the forked interpreter.
Since multiprocessing.Process closes sys.__stdin__, fix relevant
code to use the portage._get_stdin() compatibility function.
In case there's a legitimate need to inherit stdin for things like
PROPERTIES=interactive support, create a temporary duplicate of
fd_pipes[0] when appropriate, and restore sys.stdin and sys.__stdin__
in the subprocess.
Bug: https://bugs.gentoo.org/730192
Signed-off-by: Zac Medico <zmedico@gentoo.org>
3 files changed
