uloop: ensure SIGCHLD is properly received on mac os x

Signed-off-by: Felix Fietkau <nbd@openwrt.org>

1 files changed, 6 insertions, 0 deletions

diff --git a/uloop.c b/uloop.c
index 2de94f5..bf17219 100644
--- a/uloop.c
+++ b/uloop.c
@@ -57,6 +57,9 @@ static int cur_fd, cur_nfds;
 
 int uloop_init(void)
 {
+	struct timespec timeout = { 0, 0 };
+	struct kevent ev = {};
+
 	if (poll_fd >= 0)
 		return 0;
 
@@ -64,6 +67,9 @@ int uloop_init(void)
 	if (poll_fd < 0)
 		return -1;
 
+	EV_SET(&ev, SIGCHLD, EVFILT_SIGNAL, EV_ADD, 0, 0, 0);
+	kevent(poll_fd, &ev, 1, NULL, 0, &timeout);
+
 	return 0;
 }