1 files changed, 21 insertions, 0 deletions
diff --git a/tests/sys/kern/tty/fionread.c b/tests/sys/kern/tty/fionread.c
new file mode 100644
index 000000000000..929d613f883b
--- /dev/null
+++ b/tests/sys/kern/tty/fionread.c
@@ -0,0 +1,21 @@
+/*-
+ * Copyright (c) 2024 Kyle Evans <kevans@FreeBSD.org>
+ *
+ * SPDX-License-Identifier: BSD-2-Clause
+ */
+
+#include <sys/ioctl.h>
+
+#include <assert.h>
+#include <stdio.h>
+#include <unistd.h>
+
+int
+main(void)
+{
+	int nb;
+
+	assert(ioctl(STDIN_FILENO, FIONREAD, &nb) == 0);
+	printf("%d", nb);
+	return (0);
+}