1 /*
2 * libfdt - Flat Device Tree manipulation
3 * Testcase for node existence
4 * Copyright (C) 2016 Konsulko Inc.
5 *
6 * This library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public License
8 * as published by the Free Software Foundation; either version 2.1 of
9 * the License, or (at your option) any later version.
10 *
11 * This library is distributed in the hope that it will be useful, but
12 * WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
15 *
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with this library; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
19 */
20
21 #include <stdio.h>
22
23 #include <libfdt.h>
24
25 #include "tests.h"
26
27 #define CHECK(code) \
28 { \
29 int err = (code); \
30 if (err) \
31 FAIL(#code ": %s", fdt_strerror(err)); \
32 }
33
34 /* 4k ought to be enough for anybody */
35 #define FDT_COPY_SIZE (4 * 1024)
36
open_dt(char * path)37 static void *open_dt(char *path)
38 {
39 void *dt, *copy;
40
41 dt = load_blob(path);
42 copy = xmalloc(FDT_COPY_SIZE);
43
44 /*
45 * Resize our DTs to 4k so that we have room to operate on
46 */
47 CHECK(fdt_open_into(dt, copy, FDT_COPY_SIZE));
48
49 return copy;
50 }
51
main(int argc,char * argv[])52 int main(int argc, char *argv[])
53 {
54 void *fdt_base;
55 int fail_config, exists, check_exists;
56
57 test_init(argc, argv);
58 fail_config = 0;
59
60 if (argc != 4)
61 fail_config = 1;
62
63 if (!fail_config) {
64 if (!strcmp(argv[2], "exists"))
65 check_exists = 1;
66 else if (!strcmp(argv[2], "not-exists"))
67 check_exists = 0;
68 else
69 fail_config = 1;
70 }
71
72 if (fail_config)
73 CONFIG("Usage: %s <base dtb> <[exists|not-exists]> <node-path>", argv[0]);
74
75 fdt_base = open_dt(argv[1]);
76
77 exists = fdt_path_offset(fdt_base, argv[3]) >= 0;
78
79 if (exists == check_exists)
80 PASS();
81 else
82 FAIL();
83 }
84