lib/fstree/node_from_path.c


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/* SPDX-License-Identifier: GPL-3.0-or-later */
#include "fstree.h"

#include <string.h>
#include <errno.h>

tree_node_t *fstree_node_from_path(fstree_t *fs, const char *path)
{
	tree_node_t *n = fs->root;
	const char *end;
	size_t len;

	while (path != NULL && *path != '\0') {
		if (!S_ISDIR(n->mode)) {
			errno = ENOTDIR;
			return NULL;
		}

		end = strchrnul(path, '/');
		len = end - path;

		for (n = n->data.dir->children; n != NULL; n = n->next) {
			if (strncmp(path, n->name, len) != 0)
				continue;
			if (n->name[len] != '\0')
				continue;
			break;
		}

		if (n == NULL) {
			errno = ENOENT;
			return NULL;
		}

		path = *end ? (end + 1) : end;
	}

	return n;
}