1 files changed, 10 insertions, 0 deletions
diff --git a/trace2.h b/trace2.h
index 0d990db817..9b7286c572 100644
--- a/trace2.h
+++ b/trace2.h
@@ -134,6 +134,16 @@ void trace2_cmd_path_fl(const char *file, int line, const char *pathname);
 #define trace2_cmd_path(p) trace2_cmd_path_fl(__FILE__, __LINE__, (p))
 
 /*
+ * Emit an 'ancestry' event with the process name of the current process's
+ * parent process.
+ * This gives post-processors a way to determine what invoked the command and
+ * learn more about usage patterns.
+ */
+void trace2_cmd_ancestry_fl(const char *file, int line, const char **parent_names);
+
+#define trace2_cmd_ancestry(v) trace2_cmd_ancestry_fl(__FILE__, __LINE__, (v))
+
+/*
  * Emit a 'cmd_name' event with the canonical name of the command.
  * This gives post-processors a simple field to identify the command
  * without having to parse the argv.