How to disable spawnv's child process output messages

[Donn Cave]

Quoth nushin2 at yahoo.com (nushin):
| I have a program called hello_earth.py that is spawned by
| hello_moon.py, using spawnv( ) API as:
|
| os.spawnv(os.P_NOWAIT,'/usr/bin/python',('python','hello_earth.py'),('>/dev/null
| &'))
|
| I do not wish to see any output messages from the hello_earth.py when
| it is launched by its parent process and i do wish to see *only* the
| output messages from the parent process in the shell. Is Python
| capable to so such a thing?

What is the parent process in the shell?  You mean the one that calls
spawnv()?  If so - yes, Python can do that.  But not so easily.  You
can look at how spawnv is implemented (it's in Python), and read up
on the dup2 function (man 2 dup2) to see what's needed.  spawnv can't
do any kind of redirection.  I think I posted an example here a couple
weeks ago.

Or you can use the shell, more or less the way you were going but you
never invoked it -
  os.spawnv(os.P_NOWAIT, '/bin/sh', ['sh', '-c', 'python hello_earth.py > /dev/null'])

which is really about the same as
  os.system('python hello_earth.py > /dev/null &')

	Donn Cave, donn at drizzle.com