1 files changed, 70 insertions, 0 deletions
diff --git a/dtc/tests/check_path.c b/dtc/tests/check_path.c
new file mode 100644
index 000000000..cc9757a0a
--- /dev/null
+++ b/dtc/tests/check_path.c
@@ -0,0 +1,70 @@
+// SPDX-License-Identifier: LGPL-2.1-or-later
+/*
+ * libfdt - Flat Device Tree manipulation
+ *	Testcase for node existence
+ * Copyright (C) 2016 Konsulko Inc.
+ */
+
+#include <stdio.h>
+
+#include <libfdt.h>
+
+#include "tests.h"
+
+#define CHECK(code) \
+	{ \
+		int err = (code); \
+		if (err) \
+			FAIL(#code ": %s", fdt_strerror(err)); \
+	}
+
+/* 4k ought to be enough for anybody */
+#define FDT_COPY_SIZE	(4 * 1024)
+
+static void *open_dt(char *path)
+{
+	void *dt, *copy;
+
+	dt = load_blob(path);
+	copy = xmalloc(FDT_COPY_SIZE);
+
+	/*
+	 * Resize our DTs to 4k so that we have room to operate on
+	 */
+	CHECK(fdt_open_into(dt, copy, FDT_COPY_SIZE));
+
+	return copy;
+}
+
+int main(int argc, char *argv[])
+{
+	void *fdt_base;
+	int fail_config, exists, check_exists;
+
+	test_init(argc, argv);
+	fail_config = 0;
+
+	if (argc != 4)
+		fail_config = 1;
+
+	if (!fail_config) {
+		if (!strcmp(argv[2], "exists"))
+			check_exists = 1;
+		else if (!strcmp(argv[2], "not-exists"))
+			check_exists = 0;
+		else
+			fail_config = 1;
+	}
+
+	if (fail_config)
+		CONFIG("Usage: %s <base dtb> <[exists|not-exists]> <node-path>", argv[0]);
+
+	fdt_base = open_dt(argv[1]);
+
+	exists = fdt_path_offset(fdt_base, argv[3]) >= 0;
+
+	if (exists == check_exists)
+		PASS();
+	else
+		FAIL();
+}