On Sep 23 21:46, Ren? Liebscher wrote: > there is another problem with the queues. > The mentioned test case opens two different queues in the same process. > > But if you open the same queue in two different processes you get also a > permission denied error. > > I add here some test case: > --- file: receiver.c ----------------------- > [...] > ------------------------------------------ > --- file: sender.c ---------------------- > [...] > ----------------------------------------- > It just sends an integer from sender to receiver. > [...] > However on cygwin it doesn't matter which of the processes you start > first, the second one will get a permission denied. > --------------------------- > $ ./sender > Sent 1 > Sent 2 > Sent 3 > Sent 4 > Sent 5 > Sent 6 > Sent 7 > Sent 8 > --- it waits here to get free places in queue (when receiver is running) > --------------------------- > But the receiver gets this: > --------------------------- > $ ./receiver > Receiver: mq_open: Permission denied > ---------------------------
Thanks for the testcase! I could easily reproduce the problem and it turned out that it was a miserable copy/paste bug. Due to that the function opening the mutex object in the second process requests more access than the process creating the mutex has granted other processes. Consequentially the second process got a "Permission denied". I've fixed the bug in CVS. The next 1.7.0 test release or the next developer snapshot on http://cygwin.com/snapshots/ (whatever comes first) will have the patch. Thanks again for the testcase and the report, Corinna -- Corinna Vinschen Please, send mails regarding Cygwin to Cygwin Project Co-Leader cygwin AT cygwin DOT com Red Hat -- Problem reports: http://cygwin.com/problems.html FAQ: http://cygwin.com/faq/ Documentation: http://cygwin.com/docs.html Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple
