In article <[EMAIL PROTECTED]>,
[EMAIL PROTECTED] writes:
> Hi,
> I'm trying to run a process from a python script. I need the exit
> status of that process but do not care about its output, so until now
> was using os.system(). But it turned out that the process often went
> into an infinite loop, so I wrote a SIGALRM handler. Unfortunately the
> code I came up with is quite kludgy:
>
> import subprocess
> ...
> try:
> p = subprocess.Popen(..., shell = True)
> pid = p.pid
> os.waitpid(pid...)
> ...
> except ...: # Thrown by alarm signal handler
> os.kill(pid + 1) # "Real" pid = shell pid + 1
> ...
>
> The os.kill is very hacky and unsafe so I was looking for better
> ideas. Any help will be greatly appreciated. Thanks!
Assuming that the problem is really an infinite loop (and not just
an arbitrary delay), you could use the simple construct:
import os
code = os.system ("ulimit -t <secs> ; ...")
That's not guaranteed to work on all POSIX systems, but it should
work with at least ash, bash, and ksh. And it would would be
"limit cputime <secs> ; ..." if you somehow got hooked up with a
C shell.
- dmw
--
. Douglas Wells . Connection Technologies .
. Internet: -sp9804- -at - contek.com- .
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