Re: Signals and system
- From: Roman Neuhauser <neuhauser+python-list#python.org@xxxxxxxxxx>
- Date: Sun, 10 Apr 2005 13:21:20 +0200
# reply-to-group@xxxxxxx / 2005-04-10 20:55:05 +1000:
> Hi folks,
>
> My python program needs to download a number of files. Each file comes
> as a list of mirrors of that file.
>
> Currently, I am using system (os.system) to run wget. The mechanism is
> in a loop, so that it will try all the mirrors while wget is exiting
> with a non-zero exit status. This is working fine as long as the user
> feels there is no need to interrupt it.
>
> If wget receives a SIGINT, it stops (as expected) and returns non-zero
> (1 from memory). The call to system returns the same status code,
> indicating that wget failed, but the program has no knowledge that it
> was a signal the killed wget, rather than a failed download, and as such
> it tries the next mirror. I would like to be notified if wget received
> any signals, so that the user doesn't need to repetitively press Ctrl-C
> for each and every mirror to get the downloading process to stop.
>
> Can someone point me in the right direction?
http://docs.python.org/lib/os-process.html#l2h-1682
"On Unix, the return value is the exit status of the process encoded
in the format specified for wait()."
http://docs.python.org/lib/os-process.html#l2h-1684
"return a tuple containing its pid and exit status indication: a
16-bit number, whose low byte is the signal number that killed the
process, and whose high byte is the exit status (if the signal
number is zero); the high bit of the low byte is set if a core file
was produced"
--
How many Vietnam vets does it take to screw in a light bulb?
You don't know, man. You don't KNOW.
Cause you weren't THERE. http://bash.org/?255991
.
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