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diff --git a/src/libcore/device.h b/src/libcore/device.h
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+#pragma once
+
+/***
+ This file is part of systemd.
+
+ Copyright 2010 Lennart Poettering
+
+ systemd is free software; you can redistribute it and/or modify it
+ under the terms of the GNU Lesser General Public License as published by
+ the Free Software Foundation; either version 2.1 of the License, or
+ (at your option) any later version.
+
+ systemd 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
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public License
+ along with systemd; If not, see <http://www.gnu.org/licenses/>.
+***/
+
+typedef struct Device Device;
+
+typedef enum DeviceFound {
+ DEVICE_NOT_FOUND = 0,
+ DEVICE_FOUND_UDEV = 1,
+ DEVICE_FOUND_MOUNT = 2,
+ DEVICE_FOUND_SWAP = 4,
+} DeviceFound;
+
+struct Device {
+ Unit meta;
+
+ char *sysfs;
+ DeviceFound found;
+
+ /* In order to be able to distinguish dependencies on
+ different device nodes we might end up creating multiple
+ devices for the same sysfs path. We chain them up here. */
+ LIST_FIELDS(struct Device, same_sysfs);
+
+ DeviceState state, deserialized_state;
+};
+
+extern const UnitVTable device_vtable;
+
+int device_found_node(Manager *m, const char *node, bool add, DeviceFound found, bool now);