On Nov 26 21:15, Corinna Vinschen wrote: > On Nov 25 22:01, Marco Atzeri wrote: > > > > > > On 25/11/2015 12:03, Marco Atzeri wrote: > > >On 25/11/2015 08:06, Thomas Wolff wrote: > > >>Am 24.11.2015 um 23:29 schrieb Marco Atzeri: > > >>> > > > > > >>>... > > >>>I assume it is an interaction with mintty. > > >>Many problems of that kind attributed to mintty are actually problems > > >>with cygwin or especially pty. > > >>Please test also with another terminal (xterm, rxvt, ...). > > >>Also some more details could be helpful as I cannot reproduce the issue > > >>(output of `type ping`, actual host pinged). > > >>------ > > >>Thomas > > > > > >you are right is not a mintty only issue. > > >Same happens in xterm > > > > > > > > >$ which ping > > >/usr/bin/ping > > > > > >$ ping 2.2.2.2 > > >PING 2.2.2.2 (2.2.2.2): 56 data bytes > > > > > >It sticks here forever, CTRL+C ineffective. > > >Process Explorer or Task Manager are needed to kill the process. > > >Also kill -9 PID is ineffective > > > > > >On the old cygwin.bat (aka windows cmd) > > >CTRL+C is effective > > > > > > 64 $ ping 2.2.2.2 > > >PING 2.2.2.2 (2.2.2.2): 56 data bytes > > > > > >----2.2.2.2 PING Statistics---- > > >2 packets transmitted, 0 packets received, 100.0% packet loss > > > > > > the problem seems restricted to the 64bit test version of cygwin. > > I think this is pure coincidence. After some hours debugging this > problem it seems it's a race condition, architecture-independent and > present since quite a while in Cygwin. In case of ping the race leads > to a blocking socket function missing a signal arrived, thus the > signal is never handled. This in turn blocks the next signal from being > delivered. > > I have a potential fix, but I have to test it a bit. The signal code > is pretty complicated...
I created a new developer snapshot (https://cygwin.com/snapshots/) and I'm just about writing the release message for the next test release 2.4.0-0.5 which both contain a patch for this problem. Please give any of them a try. Thanks, Corinna -- Corinna Vinschen Please, send mails regarding Cygwin to Cygwin Maintainer cygwin AT cygwin DOT com Red Hat
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