On Nov 5 18:55, Corinna Vinschen wrote: > On Nov 5 10:24, Corinna Vinschen wrote: > > On Nov 4 22:25, Achim Gratz wrote: > > > Achim Gratz writes: > > > > Just confirmed this on another system. If I kill the child, then the > > > > parent resumes and finishes the test loop alright and it can be > > > > interrupted again from the shell. The hang happens after the first test > > > > succeeds in both the parent and child. > > > > > > I have just managed to kill the parent (returning the shell prompt) and > > > have the child complete the test loop output to the terminal. So I > > > guess the communication ping-pong is somehow buggered up so that pipes > > > start blocking. > > > > Staring into the latest version of my new function to remove pending > > signals, after having some *more* coffee, it seems pretty clear I > > screwed this up nicely. > > > > What I was missing all the time was to iterate over the list of pending > > signals if there's a pending signal which doesn't have to be cleared. > > This case was just missing. Duh! I guess I didn't really cover myself > > in glory here... > > > > I applied yet another patch and uploaded a new developer snapshot > > (this time *with* the ACL changes) to https://cygwin.com/snapshots/ > > > > Can you please give it a try ASAP? > > For the records, I got a testcase from Achim to reproduce the issue > which, incidentally, is still present in that snapshot. It turned out > that the problem Achim was reporting has nothing to do with the new code > clearing pending signals. It was a completely different bug, which just > showed another behaviour due to the signal change. > > In fact what happened was a deadlock when parent and child process > were industriously trying to lock a file using flock(2). This must > have been present for a long time, in fact. > > I (hopefully) fixed the issue and uploaded yet another developer > snapshot to https://cygwin.com/snapshots/ (with ACL changes again).
Hang on for a while, I forgot to push the changes upstream before creating the snapshot. Try in half an hour or so. Sorry, Corinna -- Corinna Vinschen Please, send mails regarding Cygwin to Cygwin Maintainer cygwin AT cygwin DOT com Red Hat
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