clean up main

include/sys.hpp

@@ -1,12 +1,22 @@
 #ifndef SYS_HPP
 #define SYS_HPP
 
-#include <ctime>
+#include <sys/statvfs.h>
+
 #include <array>
+#include <ctime>
 #include <string>
 #include <utils.hpp>
 
+struct mem_usage_t {
+    uint64_t free = 0;
+    uint64_t used = 0;
+    uint64_t total = 0;
+};
+
 std::string getAvgs();
 std::array<std::string, 2> getTimeDate();
+mem_usage_t getDisk(std::string mount);
+mem_usage_t getRam();
 
 #endif