// SPDX-License-Identifier: GPL-2.0-or-later

/*

 * (C) Copyright David Gibson <dwg@au1.ibm.com>, IBM Corporation.  2005.

 */

#include "dtc.h"

#include <dirent.h>

#include <sys/stat.h>

static struct node *read_fstree(const char *dirname)

{

	DIR *d;

	struct dirent *de;

	struct stat st;

	struct node *tree;

	d = opendir(dirname);

	if (!d)

		die("Couldn't opendir() \"%s\": %s\n", dirname, strerror(errno));

	tree = build_node(NULL, NULL, NULL);

	while ((de = readdir(d)) != NULL) {

		char *tmpname;

		if (streq(de->d_name, ".")

		    || streq(de->d_name, ".."))

			continue;

		tmpname = join_path(dirname, de->d_name);

		if (stat(tmpname, &st) < 0)

			die("stat(%s): %s\n", tmpname, strerror(errno));

		if (S_ISREG(st.st_mode)) {

			struct property *prop;

			FILE *pfile;

			pfile = fopen(tmpname, "rb");

			if (! pfile) {

				fprintf(stderr,

					"WARNING: Cannot open %s: %s\n",

					tmpname, strerror(errno));

			} else {

				prop = build_property(xstrdup(de->d_name),

						      data_copy_file(pfile,

								     st.st_size),

						      NULL);

				add_property(tree, prop);

				fclose(pfile);

			}

		} else if (S_ISDIR(st.st_mode)) {

			struct node *newchild;

			newchild = read_fstree(tmpname);

			newchild = name_node(newchild, xstrdup(de->d_name));

			add_child(tree, newchild);

		}

		free(tmpname);

	}

	closedir(d);

	return tree;

}

struct dt_info *dt_from_fs(const char *dirname)

{

	struct node *tree;

	tree = read_fstree(dirname);

	tree = name_node(tree, "");

	return build_dt_info(DTSF_V1, NULL, tree, guess_boot_cpuid(tree));

}