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

[lttng-tools.git] / src / bin / lttng-sessiond / main.c

diff --git a/src/bin/lttng-sessiond/main.c b/src/bin/lttng-sessiond/main.c
index 1fc875576dd0a4ebd28ef715e2b1313f6db95522..922e81b594817b365fcffa3d8f3f1ed2adfb750f 100644 (file)
--- a/src/bin/lttng-sessiond/main.c
+++ b/src/bin/lttng-sessiond/main.c
@@ -1174,8 +1174,10 @@ 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;
                                                }