commandserver: unblock SIGCHLD
This enables the SIGCHLD handler to work properly if some buggy program
started chg server with SIGCHLD blocked.
A test of this probably requires C code, but we don't have such kind of
tests already. Since this is a simple and clear fix, I'm leaving it as
"untested" but I did a manual test and there were no longer zombie workers.
Differential Revision: https://phab.mercurial-scm.org/D1737
--- a/mercurial/commandserver.py Wed Dec 20 02:13:35 2017 -0800
+++ b/mercurial/commandserver.py Wed Dec 20 11:35:38 2017 -0800
@@ -449,6 +449,8 @@
def init(self):
self._sock = socket.socket(socket.AF_UNIX)
self._servicehandler.bindsocket(self._sock, self.address)
+ if util.safehasattr(util, 'unblocksignal'):
+ util.unblocksignal(signal.SIGCHLD)
o = signal.signal(signal.SIGCHLD, self._sigchldhandler)
self._oldsigchldhandler = o
self._socketunlinked = False