Add kernel info to the api

service/web/cmd/pi-web-agent.go

@@ -11,14 +11,17 @@ import (
 type system_info_response struct {
 	OS_Info api.Os_Info_Response
 	Temperature api.Temperature_Response
+	Kernel string
 }
 
 func system_info_handler(w http.ResponseWriter, req *http.Request) {
 	os_info := api.OS_Info()
 	temperature := api.Measure_Temperature()
+	kernel_info := api.Kernel_Info()
 	json.NewEncoder(w).Encode(system_info_response{
 		os_info,
 		temperature,
+		kernel_info,
 	})
 }
 

service/web/pkg/live_info.go

@@ -53,3 +53,17 @@ func Measure_Temperature_From(command string, args ...string) Temperature_Respon
 		}
 	}
 }
+
+func Kernel_Info() string {
+	return Kernel_Info_From("uname", "-r")
+}
+
+func Kernel_Info_From(command string, args...string) string {
+	output, error := shell.RunSingle(command, args...)
+	if (error != nil) {
+		log.Fatalf("Error getting kernel info: %s", error)
+		return ""
+	} else {
+		return output
+	}
+}

service/web/test/os_info_test.go

@@ -23,6 +23,14 @@ func TestTempMeasure(t *testing.T) {
 	}
 }
 
+func TestKernelInfo(t *testing.T) {
+	expectedKernelInfo := "5.11.9-200"
+	kernel_info := api.Kernel_Info_From("echo", "-n", "5.11.9-200")
+	if (expectedKernelInfo != kernel_info) {
+		expectationFailure(expectedKernelInfo, kernel_info, t)
+	}
+}
+
 func expectationFailure(expected string, got string, t *testing.T) {
 	t.Errorf("Expected %s but got %s", expected, got)
 }