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(dirname);
19	if (!d)
20		die("Couldn't opendir() \"%s\": %s\n", dirname, strerror(errno));
21
22	tree = build_node(NULL, NULL, NULL);
23
24	while ((de = readdir(d)) != NULL) {
25		char *tmpname;
26
27		if (streq(de->d_name, ".")
28		    || streq(de->d_name, ".."))
29			continue;
30
31		tmpname = join_path(dirname, de->d_name);
32
33		if (stat(tmpname, &st) < 0)
34			die("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(tmpname, "rb");
41			if (! pfile) {
42				fprintf(stderr,
43					"WARNING: Cannot open %s: %s\n",
44					tmpname, strerror(errno));
45			} else {
46				prop = build_property(xstrdup(de->d_name),
47						      data_copy_file(pfile,
48								     st.st_size),
49						      NULL);
50				add_property(tree, prop);
51				fclose(pfile);
52			}
53		} else if (S_ISDIR(st.st_mode)) {
54			struct node *newchild;
55
56			newchild = read_fstree(tmpname);
57			newchild = name_node(newchild, xstrdup(de->d_name));
58			add_child(tree, newchild);
59		}
60
61		free(tmpname);
62	}
63
64	closedir(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(tree, "");
74
75	return build_dt_info(DTSF_V1, NULL, tree, guess_boot_cpuid(tree));
76}
77