Fix: sessiond app listening: use posix-compliant poll flags

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Signed-off-by: David Goulet <dgoulet@efficios.com>

diff --git a/src/bin/lttng-sessiond/main.c b/src/bin/lttng-sessiond/main.c
index f82f05e00b12d3521649ba6f6d2b9b0003c25c92..3cb970c06e21c62c50b42a2e7466ead067a493f9 100644 (file)
--- a/src/bin/lttng-sessiond/main.c
+++ b/src/bin/lttng-sessiond/main.c
@@ -1166,8 +1166,10 @@ static void *thread_manage_apps(void *data)
                                                /*
                                                 * We just need here to monitor the close of the UST
                                                 * socket and poll set monitor those by default.
+                                                * Listen on POLLIN (even if we never expect any
+                                                * data) to ensure that hangup wakes us.
                                                 */
-                                               ret = lttng_poll_add(&events, ust_cmd.sock, 0);
+                                               ret = lttng_poll_add(&events, ust_cmd.sock, LPOLLIN);
                                                if (ret < 0) {
                                                        goto error;
                                                }