Bug in os.spawnv with P_NOWAIT

[nushin]

If you do not null out the output of your parent process that launches
a child process by os.spawnv( ) in P_NOWAIT mode, you will see that
your child process is launched *synchronously* instead of
asynchronously. This is a bug!

Here's a code sample:

In your parent.py file, call child.py as

os.spawnv(os.P_NOWAIT,'/usr/bin/python',('python', 'child.py'))

then, make sure your child.py prints a *hello child* to screen about
2000000 times, and your parent.py prints a *hello parent* message,
then execute your file in a shell as:

python parent.py

then, you would see that whenever your child.py is finished, then
parent.py finishes, i.e., a synchronous call.

Now, null out the output of your parent process as:

python parent.py > /dev/null

then, your parent.py finishes first while child.py is still running,
i.e., an asynchronous call. Please correct me if i am wrong.

Regards,
Nushin