Implement average load request processing

Per request from the front-end, provide system average load values
as found in /proc/loadavg.

Change-Id: Ia7a63684de16bd0dbadcd2eacedb9b2d56b138d8
Signed-off-by: Vitaly Wool <vitaly.wool@konsulko.com>

1 files changed, 33 insertions, 0 deletions

diff --git a/binding/task-manager-binding.c b/binding/task-manager-binding.c
index c9946c2..2780f84 100644
--- a/binding/task-manager-binding.c
+++ b/binding/task-manager-binding.c
@@ -175,6 +175,32 @@ void get_extra_info(struct afb_req request)
 	afb_req_success(request, ret_json, NULL);
 }
 
+void get_load_avg(struct afb_req request)
+{
+	struct json_object *ret_json, *json_obj;
+		float value = 1.;
+
+	ret_json = json_object_new_object();
+	json_obj = json_object_new_object();
+
+	FILE *floadAvg = fopen("/proc/loadavg", "r");
+
+	if (floadAvg == NULL) {
+		afb_req_fail(request, "Failed", "Error processing arguments.");
+	}
+	else {
+		fscanf(floadAvg, "%4f%4*f%4*f", &value);
+
+		json_object_object_add(json_obj, "value", json_object_new_double(value));
+		json_object_object_add(json_obj, "str", json_object_new_string("Load"));
+
+		json_object_object_add(ret_json, "msgType", json_object_new_string("loadAvgInfo"));
+		json_object_object_add(ret_json, "loadInfo", json_obj);
+	}
+	fclose(floadAvg);
+
+	afb_req_success(request, ret_json, NULL);
+}
 
 int fill_pstat(proc_t *proc_info, struct pstat *pstat_values)
 {
@@ -250,6 +276,13 @@ static const struct afb_verb_v2 _afb_verbs_v2_taskmanager[] = {
 		.info = "Get exta info about current process",
 		.session = AFB_SESSION_NONE_V2
 	},
+	{
+		.verb = "get_load_avg",
+		.callback = get_load_avg,
+		.auth = NULL,
+		.info = "Get exta info about system load average",
+		.session = AFB_SESSION_NONE_V2
+	},
 };