possible bug?

[Earl Eiland]

I'm running ActivePython PythonWin 2.4, and get the error
message"'AributeError: 'module' object has no attribute 'SIGALRM'".  The
example provided in the ActivePython documents use signal.SIGALRM, so
I'm not sure what's going on...

Earl


On Tue, 2005-03-22 at 12:43, Jeff Epler wrote:
> I wrote a program to use subprocess.Popen 10000 times, and never had
> .wait() hang.  If this is a bug, it may be Windows specific.
> 
> Here's the program I ran:
> #-------------------------------------------------------------------------
> import subprocess, signal
> def timeout(*args):
>     print "Timed out waiting on", i
>     raise SystemExit, 1
> 
> signal.signal(signal.SIGALRM, timeout)
> 
> for i in xrange(10000):
>     signal.alarm(5)
>     subprocess.Popen(['/bin/true']).wait()
>     if i % 100 == 0: print "done with", i
> print "done!"
> #-------------------------------------------------------------------------
> 
> If the wait method ever hangs, the signal handler shuld be invoked.  On
> Unix, "/bin/true" is a very simple program that does nothing, so it's
> virtually guaranteed to run in less than 5 seconds.  On Windows, maybe
> you want something like subprocess.popen('cmd.exe /c rem') as a command
> that will do nothing and terminate quickly.  What happens if you run my
> program with that change to the Popen line?
> 
> Jeff