whole 1st line done basically

src/sys.c

@@ -0,0 +1,18 @@
+#include "sys.h"
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <time.h>
+
+void sys_get_time(struct time_date_t *td) {
+	constexpr char months[][4] = {"sty", "lut", "mar", "kwi", "maj", "cze", "lip", "sie", "wrz", "paz", "lis", "gru"};
+	constexpr char wdays[][4] = {"Nie", "Pon", "Wto", "Sro", "Czw", "Pia", "Sob"};
+	const time_t t = time(nullptr);
+	const struct tm *tm = localtime(&t);
+	snprintf(td->time, sizeof(td->time), "%02d:%02d:%02d", tm->tm_hour, tm->tm_min, tm->tm_sec);
+	snprintf(td->date, sizeof(td->date), "%s, %02d %s", wdays[tm->tm_wday], tm->tm_mday, months[tm->tm_mon]);
+}
+
+void sys_get_load_avg(double *load_avg) {
+	getloadavg(load_avg, 3);
+}