/* SPDX-License-Identifier: GPL-2.0+ */
-/*
- * Copyright (C) 2008-2009 Kay Sievers <kay@vrfy.org>
- *
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program. If not, see <http://www.gnu.org/licenses/>.
- */
+#include <errno.h>
+
+#include "alloc-util.h"
+#include "device-private.h"
#include "path-util.h"
-#include "string-util.h"
#include "udevadm-util.h"
+#include "unit-name.h"
-struct udev_device *find_device(struct udev *udev,
- const char *id,
- const char *prefix) {
+int find_device(const char *id, const char *prefix, sd_device **ret) {
+ _cleanup_free_ char *path = NULL;
+ int r;
- assert(udev);
assert(id);
-
- if (prefix && !startswith(id, prefix))
- id = strjoina(prefix, id);
+ assert(ret);
+
+ if (prefix) {
+ if (!path_startswith(id, prefix)) {
+ id = path = path_join(prefix, id);
+ if (!path)
+ return -ENOMEM;
+ }
+ } else {
+ /* In cases where the argument is generic (no prefix specified),
+ * check if the argument looks like a device unit name. */
+ if (unit_name_is_valid(id, UNIT_NAME_PLAIN) &&
+ unit_name_to_type(id) == UNIT_DEVICE) {
+ r = unit_name_to_path(id, &path);
+ if (r < 0)
+ return log_debug_errno(r, "Failed to convert \"%s\" to a device path: %m", id);
+ id = path;
+ }
+ }
+
+ if (path_startswith(id, "/sys/"))
+ return sd_device_new_from_syspath(ret, id);
if (path_startswith(id, "/dev/")) {
- struct stat statbuf;
- char type;
-
- if (stat(id, &statbuf) < 0)
- return NULL;
-
- if (S_ISBLK(statbuf.st_mode))
- type = 'b';
- else if (S_ISCHR(statbuf.st_mode))
- type = 'c';
- else
- return NULL;
-
- return udev_device_new_from_devnum(udev, type, statbuf.st_rdev);
- } else if (path_startswith(id, "/sys/"))
- return udev_device_new_from_syspath(udev, id);
- else
- return NULL;
+ struct stat st;
+
+ if (stat(id, &st) < 0)
+ return -errno;
+
+ return device_new_from_stat_rdev(ret, &st);
+ }
+
+ return -EINVAL;
}