problems in Perl process management
Sonam Chauhan
sonam.chauhan@ce.com.au
Tue May 10 09:03:00 GMT 2005
Hello -
I'd appreciate help with problems doing process management in Cygwin/Perl.
I have a Perl application that creates child processes - I need it to kill
processes that exceed a certain timeout. I am trying to use the
Proc::ProcessTable and Proc::Killfam CPAN modules for this.
I ran into two problems:
The first problem was a "can't stat /dev" error message produced when
calling Proc::Killfam. This problem was fixed by a script I found that
populated entries under /dev.
To understand the next probem, have a look at the simple test script
attached. The script forks a child process, which runs `sleep` in a third
process. The parent process then tries to kill both children on expiry of a
timeout. The script behaves perfectly on Linux -- it works as expected and
kills the fork-ed child Perl process, as well it's `sleep` child process.
However, on Cygwin/Perl it only kills the fork-ed Perl child - it cannot
kill the `sleep`-ing child.
The problem seems to be that the process table data returned by
Proc::ProcessTable seems to differ from the data returned 'ps'.
Specifically, Proc::ProcessTable returns the WINPID of a process as the PID
for the backticked `sleep` process.
The closest issue I found in the list archives is this one:
http://sourceware.org/ml/cygwin/2005-02/msg00224.html
It does not seem to have been resolved.
I'm running Perl on Cygwin on Windows XP SP2. Running 'cygcheck -c' gives
the following package status for cygwin and Perl:
--------------------------
cygwin 1.5.16-1 OK
perl 5.8.6-4 OK
--------------------------
Can anyone help?
Regards,
Sonam Chauhan
--
Electronic Commerce, Corporate Express Australia Ltd.
Phone: +61-2-9335-0725, Email: sonam.chauhan@ce.com.au
-------------- next part --------------
A non-text attachment was scrubbed...
Name: timeout_test2.pl
Type: application/octet-stream
Size: 819 bytes
Desc: not available
URL: <http://cygwin.com/pipermail/cygwin/attachments/20050510/0726a904/attachment.obj>
-------------- next part --------------
--
Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple
Problem reports: http://cygwin.com/problems.html
Documentation: http://cygwin.com/docs.html
FAQ: http://cygwin.com/faq/
More information about the Cygwin
mailing list