Fix: poll: show the correct number of fds

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

diff --git a/src/bin/lttng-sessiond/agent-thread.c b/src/bin/lttng-sessiond/agent-thread.c
index d7d9c6c349412ba659c3d3720e950b18ac3b8389..5f4815165fed49c113a8e9ce875c5a374890b7c6 100644 (file)
--- a/src/bin/lttng-sessiond/agent-thread.c
+++ b/src/bin/lttng-sessiond/agent-thread.c
@@ -307,12 +307,14 @@ void *agent_thread_manage_registration(void *data)
        }
 
        while (1) {
-               DBG3("[agent-thread] Manage agent polling on %d fds",
+               DBG3("[agent-thread] Manage agent polling",
                                LTTNG_POLL_GETNB(&events));
 
                /* Inifinite blocking call, waiting for transmission */
 restart:
                ret = lttng_poll_wait(&events, -1);
+               DBG3("[agent-thread] Manage agent return from poll on %d fds",
+                               LTTNG_POLL_GETNB(&events));
                if (ret < 0) {
                        /*
                         * Restart interrupted system call.
@@ -330,6 +332,11 @@ restart:
                        revents = LTTNG_POLL_GETEV(&events, i);
                        pollfd = LTTNG_POLL_GETFD(&events, i);
 
+                       if (!revents) {
+                               /* No activity for this FD (poll implementation). */
+                               continue;
+                       }
+
                        /* Thread quit pipe has been closed. Killing thread. */
                        ret = sessiond_check_thread_quit_pipe(pollfd, revents);
                        if (ret) {