diff options
Diffstat (limited to 'sysutils/xentools48/patches/patch-tools_libxl_libxl_event.c')
| -rw-r--r-- | sysutils/xentools48/patches/patch-tools_libxl_libxl_event.c | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/sysutils/xentools48/patches/patch-tools_libxl_libxl_event.c b/sysutils/xentools48/patches/patch-tools_libxl_libxl_event.c new file mode 100644 index 00000000000..73cfe79b23a --- /dev/null +++ b/sysutils/xentools48/patches/patch-tools_libxl_libxl_event.c @@ -0,0 +1,24 @@ +$NetBSD: patch-tools_libxl_libxl_event.c,v 1.1 2017/03/30 09:15:10 bouyer Exp $ + +The SIGCHLD handler just writes to a pipe where the reader is the +same process. The idea is that this will cause poll(2) in the main +thread to exit with the reaper pipe readable, and do child cleanup here. + +Unfortunably, is the child also has a write pipe back to the +parent (as e.g. with pygrub), the loop in afterpoll_internal() may see the +POLLHUP event on this pipe before the POLLIN even on the reaper pipe, and +this will be considered as an error (from e.g. pygrub). + +work around by filtering POLLHUP events here + +--- tools/libxl/libxl_event.c.orig 2016-12-20 16:01:30.000000000 +0100 ++++ tools/libxl/libxl_event.c 2016-12-20 17:28:52.000000000 +0100 +@@ -1261,7 +1261,7 @@ + + revents = afterpoll_check_fd(poller,fds,nfds, + efd->fd,efd->events); +- if (revents) ++ if (revents & ~POLLHUP) + goto found_fd_event; + } + /* no ordinary fd events, then */ |