weston-launch: Use SOCK_SEQPACKET for the launcher socket
This lets us detect hang-up when weston-launch dies and clean up properly.
diff --git a/src/weston-launch.c b/src/weston-launch.c
index fa9104d..80c06a8 100644
--- a/src/weston-launch.c
+++ b/src/weston-launch.c
@@ -192,7 +192,7 @@
static int
setup_launcher_socket(struct weston_launch *wl)
{
- if (socketpair(AF_LOCAL, SOCK_DGRAM, 0, wl->sock) < 0)
+ if (socketpair(AF_LOCAL, SOCK_SEQPACKET, 0, wl->sock) < 0)
error(1, errno, "socketpair failed");
if (fcntl(wl->sock[0], F_SETFD, FD_CLOEXEC) < 0)