Display discarded and lost events at destroy and stop

[lttng-tools.git] / src / bin / lttng / commands / destroy.c

diff --git a/src/bin/lttng/commands/destroy.c b/src/bin/lttng/commands/destroy.c
index f74bf515c79ae44c7668e8cd674156ce24159da0..ad181d7c4343b72182269556bf689d593bd21d4d 100644 (file)
--- a/src/bin/lttng/commands/destroy.c
+++ b/src/bin/lttng/commands/destroy.c
@@ -23,6 +23,7 @@
 #include <sys/stat.h>
 #include <sys/types.h>
 #include <unistd.h>
+#include <stdbool.h>
 
 #include "../command.h"
 
@@ -32,6 +33,7 @@
 
 static char *opt_session_name;
 static int opt_destroy_all;
+static int opt_no_wait;
 
 /* Mi writer */
 static struct mi_writer *writer;
@@ -46,6 +48,7 @@ static struct poptOption long_options[] = {
        {"help",      'h', POPT_ARG_NONE, 0, OPT_HELP, 0, 0},
        {"all",       'a', POPT_ARG_VAL, &opt_destroy_all, 1, 0, 0},
        {"list-options", 0, POPT_ARG_NONE, NULL, OPT_LIST_OPTIONS, NULL, NULL},
+       {"no-wait",   'n', POPT_ARG_VAL, &opt_no_wait, 1, 0, 0},
        {0, 0, 0, 0, 0, 0, 0}
 };
 
@@ -63,6 +66,7 @@ static void usage(FILE *ofp)
        fprintf(ofp, "  -h, --help           Show this help\n");
        fprintf(ofp, "  -a, --all            Destroy all sessions\n");
        fprintf(ofp, "      --list-options   Simple listing of options\n");
+       fprintf(ofp, "  -n, --no-wait        Don't wait for data availability\n");
        fprintf(ofp, "\n");
 }
 
@@ -76,17 +80,45 @@ static int destroy_session(struct lttng_session *session)
 {
        int ret;
        char *session_name = NULL;
+       bool session_was_stopped;
 
-       ret = lttng_destroy_session(session->name);
+       ret = lttng_stop_tracing_no_wait(session->name);
+       if (ret < 0 && ret != -LTTNG_ERR_TRACE_ALREADY_STOPPED) {
+               ERR("%s", lttng_strerror(ret));
+       }
+       session_was_stopped = ret == -LTTNG_ERR_TRACE_ALREADY_STOPPED;
+       if (!opt_no_wait) {
+               _MSG("Waiting for data availability");
+               fflush(stdout);
+               do {
+                       ret = lttng_data_pending(session->name);
+                       if (ret < 0) {
+                               /* Return the data available call error. */
+                               goto error;
+                       }
+
+                       /*
+                        * Data sleep time before retrying (in usec). Don't sleep if the call
+                        * returned value indicates availability.
+                        */
+                       if (ret) {
+                               usleep(DEFAULT_DATA_AVAILABILITY_WAIT_TIME);
+                               _MSG(".");
+                               fflush(stdout);
+                       }
+               } while (ret != 0);
+               MSG("");
+       }
+       if (!session_was_stopped) {
+               /*
+                * Don't print the event and packet loss warnings since the user
+                * already saw them when stopping the trace.
+                */
+               print_session_stats(session->name);
+       }
+
+       ret = lttng_destroy_session_no_wait(session->name);
        if (ret < 0) {
-               switch (-ret) {
-               case LTTNG_ERR_SESS_NOT_FOUND:
-                       WARN("Session name %s not found", session->name);
-                       break;
-               default:
-                       ERR("%s", lttng_strerror(ret));
-                       break;
-               }
                goto error;
        }