1 files changed, 15 insertions, 0 deletions
diff --git a/dwmclock.c b/dwmclock.c
index e7fd938..b409555 100644
--- a/dwmclock.c
+++ b/dwmclock.c
@@ -62,6 +62,9 @@ void handler(int sig)
 
 int main(void)
 {
+#ifdef EXACT_SLEEP
+	struct timespec ts;
+#endif /* EXACT_SLEEP */
 	struct tm *tm;
 	time_t now;
 #ifdef BATTERY
@@ -128,13 +131,25 @@ int main(void)
 		perc[7] = ' ';
 #endif /* BATTERY */
 
+#ifdef EXACT_SLEEP
+		clock_gettime(CLOCK_REALTIME, &ts);
+		now = ts.tv_sec;
+#else
 		now = time(NULL);
+#endif /* EXACT_SLEEP */
 		tm = localtime(&now);
 		strftime(clock, 9, "%H:%M:%S", tm);
 
 		XStoreName(disp, root, name);
 		XFlush(disp);
+
+#ifdef EXACT_SLEEP
+		ts.tv_sec = 0;
+		ts.tv_nsec = 1000000000 - ts.tv_nsec;
+		nanosleep(&ts, NULL);
+#else
 		sleep(1);
+#endif /* EXACT_SLEEP */
 	}
 	XCloseDisplay(disp);