Add listing kernel event support

[lttng-tools.git] / lttng / lttng.c

diff --git a/lttng/lttng.c b/lttng/lttng.c
index 75cb1b47372323c656d59b8851fc41f9bb85b4dc..9c34d2c62377ab66c02c9d4b766f01b6cff57eca 100644 (file)
--- a/lttng/lttng.c
+++ b/lttng/lttng.c
@@ -47,6 +47,7 @@ static int process_client_opt(void);
 static int process_opt_list_apps(void);
 static int process_opt_list_sessions(void);
 static int process_opt_list_traces(void);
+static int process_opt_kernel_list_events(void);
 static int process_opt_create_session(void);
 static int process_kernel_create_trace(void);
 static int process_opt_kernel_event(void);
@@ -87,6 +88,18 @@ static int process_client_opt(void)
                goto error;
        }
 
+       if (opt_list_events) {
+               if (opt_trace_kernel) {
+                       ret = process_opt_kernel_list_events();
+                       if (ret < 0) {
+                               goto end;
+                       }
+               } else if (opt_trace_pid != 0) {
+                       // TODO
+               }
+               goto error;
+       }
+
        /* Session creation or auto session set on */
        if (auto_session || opt_create_session) {
                DBG("Creating a new session");
@@ -253,7 +266,40 @@ error:
 }
 
 /*
- *  process_kernel_event
+ *  process_opt_kernel_list_events
+ *
+ *  Ask for all trace events in the kernel and pretty print them.
+ */
+static int process_opt_kernel_list_events(void)
+{
+       int ret, pos, size;
+       char *event_list, *event, *ptr;
+
+       DBG("Getting all tracing events");
+
+       ret = lttng_kernel_list_events(&event_list);
+       if (ret < 0) {
+               ERR("Unable to list events.");
+               return ret;
+       }
+
+       MSG("Kernel tracepoints:\n-------------");
+
+       ptr = event_list;
+       while ((size = sscanf(ptr, "event { name = %m[^;]; };%n\n", &event, &pos)) == 1) {
+               MSG("    - %s", event);
+               /* Move pointer to the next line */
+               ptr += pos + 1;
+               free(event);
+       }
+
+       free(event_list);
+
+       return 0;
+}
+
+/*
+ *  process_opt_kernel_event
  *
  *  Enable kernel event from the command line list given.
  */