Fix nasa#1477, CFE_ES_GetTaskName return code no longer misleading

Author: zanzaben

modules/cfe_testcase/src/es_task_test.c

@@ -120,7 +120,7 @@ void TestChildTaskName(void)
     UtAssert_INT32_EQ(CFE_ES_GetTaskName(NULL, TaskId, sizeof(TaskNameBuf)), CFE_ES_BAD_ARGUMENT);
     UtAssert_INT32_EQ(CFE_ES_GetTaskName(TaskNameBuf, CFE_ES_TASKID_UNDEFINED, sizeof(TaskNameBuf)),
                       CFE_ES_ERR_RESOURCEID_NOT_VALID);
-    UtAssert_INT32_EQ(CFE_ES_GetTaskName(TaskNameBuf, TaskId, sizeof(TaskName) - 4), CFE_ES_ERR_RESOURCEID_NOT_VALID);
+    UtAssert_INT32_EQ(CFE_ES_GetTaskName(TaskNameBuf, TaskId, sizeof(TaskName) - 4), CFE_STATUS_EXTERNAL_RESOURCE_FAIL);
 
     UtAssert_INT32_EQ(CFE_ES_DeleteChildTask(TaskId), CFE_SUCCESS);
 }

modules/es/fsw/src/cfe_es_api.c

@@ -987,10 +987,14 @@ CFE_Status_t CFE_ES_GetTaskName(char *TaskName, CFE_ES_TaskId_t TaskId, size_t B
     OsalId = CFE_ES_TaskId_ToOSAL(TaskId);
     Result = OS_GetResourceName(OsalId, TaskName, BufferLength);
 
-    if (Result != OS_SUCCESS)
+    if (Result == OS_ERR_INVALID_ID)
     {
         return CFE_ES_ERR_RESOURCEID_NOT_VALID;
     }
+    else if (Result != OS_SUCCESS)
+    {
+        return CFE_STATUS_EXTERNAL_RESOURCE_FAIL;
+    }
 
     return CFE_SUCCESS;
 }