src/core/device.h

   1 /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
   2
   3 #ifndef foodevicehfoo
   4 #define foodevicehfoo
   5
   6 /***
   7   This file is part of systemd.
   8
   9   Copyright 2010 Lennart Poettering
  10
  11   systemd is free software; you can redistribute it and/or modify it
  12   under the terms of the GNU Lesser General Public License as published by
  13   the Free Software Foundation; either version 2.1 of the License, or
  14   (at your option) any later version.
  15
  16   systemd is distributed in the hope that it will be useful, but
  17   WITHOUT ANY WARRANTY; without even the implied warranty of
  18   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  19   Lesser General Public License for more details.
  20
  21   You should have received a copy of the GNU Lesser General Public License
  22   along with systemd; If not, see <http://www.gnu.org/licenses/>.
  23 ***/
  24
  25 typedef struct Device Device;
  26
  27 #include "unit.h"
  28
  29 /* We simply watch devices, we cannot plug/unplug them. That
  30  * simplifies the state engine greatly */
  31 typedef enum DeviceState {
  32         DEVICE_DEAD,
  33         DEVICE_PLUGGED,
  34         _DEVICE_STATE_MAX,
  35         _DEVICE_STATE_INVALID = -1
  36 } DeviceState;
  37
  38 struct Device {
  39         Unit meta;
  40
  41         char *sysfs;
  42
  43         /* In order to be able to distinguish dependencies on
  44         different device nodes we might end up creating multiple
  45         devices for the same sysfs path. We chain them up here. */
  46
  47         LIST_FIELDS(struct Device, same_sysfs);
  48
  49         DeviceState state;
  50 };
  51
  52 extern const UnitVTable device_vtable;
  53
  54 void device_fd_event(Manager *m, int events);
  55
  56 const char* device_state_to_string(DeviceState i);
  57 DeviceState device_state_from_string(const char *s);
  58
  59 #endif