--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main/xutil.h	Tue Oct 08 12:00:31 2019 +0200
@@ -0,0 +1,8 @@
+#ifndef XUTIL_H
+#define	XUTIL_H
+
+char *xmalloc(size_t);
+char *xstrcpy(char *);
+char *xstrcat(char *, char *);
+
+#endif