On Thu, Jun 22, 2006 at 07:52:37PM -0700, Yitzchak Scott-Thoennes wrote: >On Thu, Jun 22, 2006 at 06:53:38PM -0700, Brian Dessent wrote: >> Linda Walsh wrote: >>>The attached test case is simple and fairly short. It does not depend >>>on File::BOM (and has none of the code from it). >>> >>>It's only dependency (other than perl) is the POSIX module, where, >>>from, the "fifo" command is taken. >> >>This appears to be a deadlock in the Cygwin DLL when both the reader >>and writer end of a fifo tries to open the file at the same time (or >>nearly the same time.) They end up signaling each other to ask about >>the other end of the pipe, and hang there. It has nothing to do with >>perl or fork, as far as I can tell -- the attached C testcase will work >>fine if the reader end sleeps briefly to ensure the opening order. >>It's just a classic race condition somewhere. > >Good job isolating this problem, Linda and Brian.
Not to denigrate Brian's analysis but, AFAICT, there was already a snapshot with the fix by the time he sent his mail. I only point this out because I didn't want it to look like I was ungrateful for Brian's analysis or that I used it and didn't give credit. cgf -- 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/
