1 /* $NetBSD: check_path.c,v 1.1.1.2 2019/12/22 12:34:07 skrll Exp $ */
2
3 // SPDX-License-Identifier: LGPL-2.1-or-later
4 /*
5 * libfdt - Flat Device Tree manipulation
6 * Testcase for node existence
7 * Copyright (C) 2016 Konsulko Inc.
8 */
9
10 #include <stdio.h>
11
12 #include <libfdt.h>
13
14 #include "tests.h"
15
16 #define CHECK(code) \
17 { \
18 int err = (code); \
19 if (err) \
20 FAIL(#code ": %s", fdt_strerror(err)); \
21 }
22
23 /* 4k ought to be enough for anybody */
24 #define FDT_COPY_SIZE (4 * 1024)
25
open_dt(char * path)26 static void *open_dt(char *path)
27 {
28 void *dt, *copy;
29
30 dt = load_blob(path);
31 copy = xmalloc(FDT_COPY_SIZE);
32
33 /*
34 * Resize our DTs to 4k so that we have room to operate on
35 */
36 CHECK(fdt_open_into(dt, copy, FDT_COPY_SIZE));
37
38 return copy;
39 }
40
main(int argc,char * argv[])41 int main(int argc, char *argv[])
42 {
43 void *fdt_base;
44 int fail_config, exists, check_exists;
45
46 test_init(argc, argv);
47 fail_config = 0;
48
49 if (argc != 4)
50 fail_config = 1;
51
52 if (!fail_config) {
53 if (!strcmp(argv[2], "exists"))
54 check_exists = 1;
55 else if (!strcmp(argv[2], "not-exists"))
56 check_exists = 0;
57 else
58 fail_config = 1;
59 }
60
61 if (fail_config)
62 CONFIG("Usage: %s <base dtb> <[exists|not-exists]> <node-path>", argv[0]);
63
64 fdt_base = open_dt(argv[1]);
65
66 exists = fdt_path_offset(fdt_base, argv[3]) >= 0;
67
68 if (exists == check_exists)
69 PASS();
70 else
71 FAIL();
72 }
73