calling a program without waiting for it to finish
exarkun at intarweb.us
Thu Mar 20 18:41:19 CET 2003
On Thu, Mar 20, 2003 at 09:07:42AM -0800, Brian Munroe wrote:
> > the shell interactively, only, of course!-) as soon as it's done
> > setting things up, so the pipeline runs in separate processes.
> > os.system delegates the whole operation to the system shell (normally
> > sh) so the above information should be directly applicable...
> So if you enter os.system('ping blah.com &') it will basically shell out
> to the os and run the ping command in the background? If you use ping
> without a -n option (atleast on the machine I am on) it will continue
> to ping forever (or until ^C)
> So, do you know if this process terminates when the python script
> finishes, or will it continue to run in the background? If it continues
> to run, this could cause problems.
> I would try it, but I don't have access to a python interpeter at the
Python is the parent of the shell os.system() creates, and so is the
parent of the ping process that shell execvs itself into.
Like any other parent/sibling relationship, the parent disappearing has
negligible effect on the child. The ping will continue to run after Python
Check out the commands and popen2 module, these might provide a workable
alternative to os.system().
Examinations are formidable even to the best prepared, for
even the greatest fool may ask more the the wisest man can answer.
-- C.C. Colton
up 13:58, 4 users, load average: 0.55, 0.57, 0.47
More information about the Python-list