1 /* $NetBSD: get_path.c,v 1.1.1.3 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 fdt_get_path()
7 * Copyright (C) 2006 David Gibson, IBM Corporation.
8 */
9 #include <stdlib.h>
10 #include <stdio.h>
11 #include <string.h>
12 #include <stdint.h>
13
14 #include <libfdt.h>
15
16 #include "tests.h"
17 #include "testdata.h"
18
19 #define POISON ('\xff')
20
check_path_buf(void * fdt,const char * path,int pathlen,int buflen)21 static void check_path_buf(void *fdt, const char *path, int pathlen, int buflen)
22 {
23 int offset;
24 char buf[buflen+1];
25 int len;
26
27 offset = fdt_path_offset(fdt, path);
28 if (offset < 0)
29 FAIL("Couldn't find path \"%s\": %s", path, fdt_strerror(offset));
30
31 memset(buf, POISON, sizeof(buf)); /* poison the buffer */
32
33 len = fdt_get_path(fdt, offset, buf, buflen);
34 verbose_printf("get_path() %s -> %d -> %s\n", path, offset,
35 len >= 0 ? buf : "<error>");
36
37 if (buflen <= pathlen) {
38 if (len != -FDT_ERR_NOSPACE)
39 FAIL("fdt_get_path([%d bytes]) returns %d with "
40 "insufficient buffer space", buflen, len);
41 } else {
42 if (len < 0)
43 FAIL("fdt_get_path([%d bytes]): %s", buflen,
44 fdt_strerror(len));
45 if (len != 0)
46 FAIL("fdt_get_path([%d bytes]) returns %d "
47 "instead of 0", buflen, len);
48 if (strcmp(buf, path) != 0)
49 FAIL("fdt_get_path([%d bytes]) returns \"%s\" "
50 "instead of \"%s\"", buflen, buf, path);
51 }
52
53 if (buf[buflen] != POISON)
54 FAIL("fdt_get_path([%d bytes]) overran buffer", buflen);
55 }
56
check_path(void * fdt,const char * path)57 static void check_path(void *fdt, const char *path)
58 {
59 int pathlen = strlen(path);
60
61 check_path_buf(fdt, path, pathlen, 1024);
62 check_path_buf(fdt, path, pathlen, pathlen+1);
63 check_path_buf(fdt, path, pathlen, pathlen);
64 check_path_buf(fdt, path, pathlen, 0);
65 check_path_buf(fdt, path, pathlen, 2);
66 }
67
main(int argc,char * argv[])68 int main(int argc, char *argv[])
69 {
70 void *fdt;
71
72 test_init(argc, argv);
73 fdt = load_blob_arg(argc, argv);
74
75 check_path(fdt, "/");
76 check_path(fdt, "/subnode@1");
77 check_path(fdt, "/subnode@2");
78 check_path(fdt, "/subnode@1/subsubnode");
79 check_path(fdt, "/subnode@2/subsubnode@0");
80
81 PASS();
82 }
83