tracectl.c: add description comment

diff --git a/libust/tracectl.c b/libust/tracectl.c
index ef0155db3388441d83fe3afe813f66b5e78d64e3..2f9215e65b29adc0df6095ce72c206425304c559 100644 (file)
--- a/libust/tracectl.c
+++ b/libust/tracectl.c
@@ -15,6 +15,11 @@
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301 USA
  */
 
+/* This file contains the implementation of the UST listener thread, which
+ * receives trace control commands. It also coordinates the initialization of
+ * libust.
+ */
+
 #define _GNU_SOURCE
 #include <stdio.h>
 #include <stdlib.h>