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1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * (C) Copyright David Gibson <dwg@au1.ibm.com>, IBM Corporation. 2005.
4 */
5
6#include "dtc.h"
7
8#include <dirent.h>
9#include <sys/stat.h>
10
11static struct node *read_fstree(const char *dirname)
12{
13 DIR *d;
14 struct dirent *de;
15 struct stat st;
16 struct node *tree;
17
18 d = opendir(name: dirname);
19 if (!d)
20 die(str: "Couldn't opendir() \"%s\": %s\n", dirname, strerror(errno));
21
22 tree = build_node(NULL, NULL, NULL);
23
24 while ((de = readdir(dirp: d)) != NULL) {
25 char *tmpname;
26
27 if (streq(de->d_name, ".")
28 || streq(de->d_name, ".."))
29 continue;
30
31 tmpname = join_path(path: dirname, name: de->d_name);
32
33 if (stat(file: tmpname, buf: &st) < 0)
34 die(str: "stat(%s): %s\n", tmpname, strerror(errno));
35
36 if (S_ISREG(st.st_mode)) {
37 struct property *prop;
38 FILE *pfile;
39
40 pfile = fopen(filename: tmpname, modes: "rb");
41 if (! pfile) {
42 fprintf(stderr,
43 format: "WARNING: Cannot open %s: %s\n",
44 tmpname, strerror(errno));
45 } else {
46 prop = build_property(name: de->d_name,
47 val: data_copy_file(f: pfile,
48 len: st.st_size),
49 NULL);
50 add_property(node: tree, prop);
51 fclose(stream: pfile);
52 }
53 } else if (S_ISDIR(st.st_mode)) {
54 struct node *newchild;
55
56 newchild = read_fstree(dirname: tmpname);
57 newchild = name_node(node: newchild, name: xstrdup(s: de->d_name));
58 add_child(parent: tree, child: newchild);
59 }
60
61 free(ptr: tmpname);
62 }
63
64 closedir(dirp: d);
65 return tree;
66}
67
68struct dt_info *dt_from_fs(const char *dirname)
69{
70 struct node *tree;
71
72 tree = read_fstree(dirname);
73 tree = name_node(node: tree, name: "");
74
75 return build_dt_info(DTSF_V1, NULL, tree, boot_cpuid_phys: guess_boot_cpuid(tree));
76}
77

source code of linux/scripts/dtc/fstree.c