initial check-in, version 0.5.0
diff --git a/src/stdio/vsprintf.c b/src/stdio/vsprintf.c
new file mode 100644
index 0000000..7836ccb
--- /dev/null
+++ b/src/stdio/vsprintf.c
@@ -0,0 +1,7 @@
+#include <stdio.h>
+#include <limits.h>
+
+int vsprintf(char *s, const char *fmt, va_list ap)
+{
+	return vsnprintf(s, INT_MAX, fmt, ap);
+}