src/basic/unit-def.h

   1 /* SPDX-License-Identifier: LGPL-2.1+ */
   2 #pragma once
   3
   4 /***
   5   This file is part of systemd.
   6
   7   Copyright 2010 Lennart Poettering
   8 ***/
   9
  10 #include <stdbool.h>
  11
  12 #include "macro.h"
  13
  14 typedef enum UnitType {
  15         UNIT_SERVICE = 0,
  16         UNIT_SOCKET,
  17         UNIT_TARGET,
  18         UNIT_DEVICE,
  19         UNIT_MOUNT,
  20         UNIT_AUTOMOUNT,
  21         UNIT_SWAP,
  22         UNIT_TIMER,
  23         UNIT_PATH,
  24         UNIT_SLICE,
  25         UNIT_SCOPE,
  26         _UNIT_TYPE_MAX,
  27         _UNIT_TYPE_INVALID = -1
  28 } UnitType;
  29
  30 typedef enum UnitLoadState {
  31         UNIT_STUB = 0,
  32         UNIT_LOADED,
  33         UNIT_NOT_FOUND,
  34         UNIT_ERROR,
  35         UNIT_MERGED,
  36         UNIT_MASKED,
  37         _UNIT_LOAD_STATE_MAX,
  38         _UNIT_LOAD_STATE_INVALID = -1
  39 } UnitLoadState;
  40
  41 typedef enum UnitActiveState {
  42         UNIT_ACTIVE,
  43         UNIT_RELOADING,
  44         UNIT_INACTIVE,
  45         UNIT_FAILED,
  46         UNIT_ACTIVATING,
  47         UNIT_DEACTIVATING,
  48         _UNIT_ACTIVE_STATE_MAX,
  49         _UNIT_ACTIVE_STATE_INVALID = -1
  50 } UnitActiveState;
  51
  52 typedef enum AutomountState {
  53         AUTOMOUNT_DEAD,
  54         AUTOMOUNT_WAITING,
  55         AUTOMOUNT_RUNNING,
  56         AUTOMOUNT_FAILED,
  57         _AUTOMOUNT_STATE_MAX,
  58         _AUTOMOUNT_STATE_INVALID = -1
  59 } AutomountState;
  60
  61 /* We simply watch devices, we cannot plug/unplug them. That
  62  * simplifies the state engine greatly */
  63 typedef enum DeviceState {
  64         DEVICE_DEAD,
  65         DEVICE_TENTATIVE, /* mounted or swapped, but not (yet) announced by udev */
  66         DEVICE_PLUGGED,   /* announced by udev */
  67         _DEVICE_STATE_MAX,
  68         _DEVICE_STATE_INVALID = -1
  69 } DeviceState;
  70
  71 typedef enum MountState {
  72         MOUNT_DEAD,
  73         MOUNT_MOUNTING,               /* /usr/bin/mount is running, but the mount is not done yet. */
  74         MOUNT_MOUNTING_DONE,          /* /usr/bin/mount is running, and the mount is done. */
  75         MOUNT_MOUNTED,
  76         MOUNT_REMOUNTING,
  77         MOUNT_UNMOUNTING,
  78         MOUNT_REMOUNTING_SIGTERM,
  79         MOUNT_REMOUNTING_SIGKILL,
  80         MOUNT_UNMOUNTING_SIGTERM,
  81         MOUNT_UNMOUNTING_SIGKILL,
  82         MOUNT_FAILED,
  83         _MOUNT_STATE_MAX,
  84         _MOUNT_STATE_INVALID = -1
  85 } MountState;
  86
  87 typedef enum PathState {
  88         PATH_DEAD,
  89         PATH_WAITING,
  90         PATH_RUNNING,
  91         PATH_FAILED,
  92         _PATH_STATE_MAX,
  93         _PATH_STATE_INVALID = -1
  94 } PathState;
  95
  96 typedef enum ScopeState {
  97         SCOPE_DEAD,
  98         SCOPE_RUNNING,
  99         SCOPE_ABANDONED,
 100         SCOPE_STOP_SIGTERM,
 101         SCOPE_STOP_SIGKILL,
 102         SCOPE_FAILED,
 103         _SCOPE_STATE_MAX,
 104         _SCOPE_STATE_INVALID = -1
 105 } ScopeState;
 106
 107 typedef enum ServiceState {
 108         SERVICE_DEAD,
 109         SERVICE_START_PRE,
 110         SERVICE_START,
 111         SERVICE_START_POST,
 112         SERVICE_RUNNING,
 113         SERVICE_EXITED,            /* Nothing is running anymore, but RemainAfterExit is true hence this is OK */
 114         SERVICE_RELOAD,
 115         SERVICE_STOP,              /* No STOP_PRE state, instead just register multiple STOP executables */
 116         SERVICE_STOP_SIGABRT,      /* Watchdog timeout */
 117         SERVICE_STOP_SIGTERM,
 118         SERVICE_STOP_SIGKILL,
 119         SERVICE_STOP_POST,
 120         SERVICE_FINAL_SIGTERM,     /* In case the STOP_POST executable hangs, we shoot that down, too */
 121         SERVICE_FINAL_SIGKILL,
 122         SERVICE_FAILED,
 123         SERVICE_AUTO_RESTART,
 124         _SERVICE_STATE_MAX,
 125         _SERVICE_STATE_INVALID = -1
 126 } ServiceState;
 127
 128 typedef enum SliceState {
 129         SLICE_DEAD,
 130         SLICE_ACTIVE,
 131         _SLICE_STATE_MAX,
 132         _SLICE_STATE_INVALID = -1
 133 } SliceState;
 134
 135 typedef enum SocketState {
 136         SOCKET_DEAD,
 137         SOCKET_START_PRE,
 138         SOCKET_START_CHOWN,
 139         SOCKET_START_POST,
 140         SOCKET_LISTENING,
 141         SOCKET_RUNNING,
 142         SOCKET_STOP_PRE,
 143         SOCKET_STOP_PRE_SIGTERM,
 144         SOCKET_STOP_PRE_SIGKILL,
 145         SOCKET_STOP_POST,
 146         SOCKET_FINAL_SIGTERM,
 147         SOCKET_FINAL_SIGKILL,
 148         SOCKET_FAILED,
 149         _SOCKET_STATE_MAX,
 150         _SOCKET_STATE_INVALID = -1
 151 } SocketState;
 152
 153 typedef enum SwapState {
 154         SWAP_DEAD,
 155         SWAP_ACTIVATING,               /* /sbin/swapon is running, but the swap not yet enabled. */
 156         SWAP_ACTIVATING_DONE,          /* /sbin/swapon is running, and the swap is done. */
 157         SWAP_ACTIVE,
 158         SWAP_DEACTIVATING,
 159         SWAP_DEACTIVATING_SIGTERM,
 160         SWAP_DEACTIVATING_SIGKILL,
 161         SWAP_FAILED,
 162         _SWAP_STATE_MAX,
 163         _SWAP_STATE_INVALID = -1
 164 } SwapState;
 165
 166 typedef enum TargetState {
 167         TARGET_DEAD,
 168         TARGET_ACTIVE,
 169         _TARGET_STATE_MAX,
 170         _TARGET_STATE_INVALID = -1
 171 } TargetState;
 172
 173 typedef enum TimerState {
 174         TIMER_DEAD,
 175         TIMER_WAITING,
 176         TIMER_RUNNING,
 177         TIMER_ELAPSED,
 178         TIMER_FAILED,
 179         _TIMER_STATE_MAX,
 180         _TIMER_STATE_INVALID = -1
 181 } TimerState;
 182
 183 typedef enum UnitDependency {
 184         /* Positive dependencies */
 185         UNIT_REQUIRES,
 186         UNIT_REQUISITE,
 187         UNIT_WANTS,
 188         UNIT_BINDS_TO,
 189         UNIT_PART_OF,
 190
 191         /* Inverse of the above */
 192         UNIT_REQUIRED_BY,             /* inverse of 'requires' is 'required_by' */
 193         UNIT_REQUISITE_OF,            /* inverse of 'requisite' is 'requisite_of' */
 194         UNIT_WANTED_BY,               /* inverse of 'wants' */
 195         UNIT_BOUND_BY,                /* inverse of 'binds_to' */
 196         UNIT_CONSISTS_OF,             /* inverse of 'part_of' */
 197
 198         /* Negative dependencies */
 199         UNIT_CONFLICTS,               /* inverse of 'conflicts' is 'conflicted_by' */
 200         UNIT_CONFLICTED_BY,
 201
 202         /* Order */
 203         UNIT_BEFORE,                  /* inverse of 'before' is 'after' and vice versa */
 204         UNIT_AFTER,
 205
 206         /* On Failure */
 207         UNIT_ON_FAILURE,
 208
 209         /* Triggers (i.e. a socket triggers a service) */
 210         UNIT_TRIGGERS,
 211         UNIT_TRIGGERED_BY,
 212
 213         /* Propagate reloads */
 214         UNIT_PROPAGATES_RELOAD_TO,
 215         UNIT_RELOAD_PROPAGATED_FROM,
 216
 217         /* Joins namespace of */
 218         UNIT_JOINS_NAMESPACE_OF,
 219
 220         /* Reference information for GC logic */
 221         UNIT_REFERENCES,              /* Inverse of 'references' is 'referenced_by' */
 222         UNIT_REFERENCED_BY,
 223
 224         _UNIT_DEPENDENCY_MAX,
 225         _UNIT_DEPENDENCY_INVALID = -1
 226 } UnitDependency;
 227
 228 typedef enum NotifyAccess {
 229         NOTIFY_NONE,
 230         NOTIFY_ALL,
 231         NOTIFY_MAIN,
 232         NOTIFY_EXEC,
 233         _NOTIFY_ACCESS_MAX,
 234         _NOTIFY_ACCESS_INVALID = -1
 235 } NotifyAccess;
 236
 237 char *unit_dbus_path_from_name(const char *name);
 238 int unit_name_from_dbus_path(const char *path, char **name);
 239
 240 const char* unit_dbus_interface_from_type(UnitType t);
 241 const char *unit_dbus_interface_from_name(const char *name);
 242
 243 const char *unit_type_to_string(UnitType i) _const_;
 244 UnitType unit_type_from_string(const char *s) _pure_;
 245
 246 const char *unit_load_state_to_string(UnitLoadState i) _const_;
 247 UnitLoadState unit_load_state_from_string(const char *s) _pure_;
 248
 249 const char *unit_active_state_to_string(UnitActiveState i) _const_;
 250 UnitActiveState unit_active_state_from_string(const char *s) _pure_;
 251
 252 const char* automount_state_to_string(AutomountState i) _const_;
 253 AutomountState automount_state_from_string(const char *s) _pure_;
 254
 255 const char* device_state_to_string(DeviceState i) _const_;
 256 DeviceState device_state_from_string(const char *s) _pure_;
 257
 258 const char* mount_state_to_string(MountState i) _const_;
 259 MountState mount_state_from_string(const char *s) _pure_;
 260
 261 const char* path_state_to_string(PathState i) _const_;
 262 PathState path_state_from_string(const char *s) _pure_;
 263
 264 const char* scope_state_to_string(ScopeState i) _const_;
 265 ScopeState scope_state_from_string(const char *s) _pure_;
 266
 267 const char* service_state_to_string(ServiceState i) _const_;
 268 ServiceState service_state_from_string(const char *s) _pure_;
 269
 270 const char* slice_state_to_string(SliceState i) _const_;
 271 SliceState slice_state_from_string(const char *s) _pure_;
 272
 273 const char* socket_state_to_string(SocketState i) _const_;
 274 SocketState socket_state_from_string(const char *s) _pure_;
 275
 276 const char* swap_state_to_string(SwapState i) _const_;
 277 SwapState swap_state_from_string(const char *s) _pure_;
 278
 279 const char* target_state_to_string(TargetState i) _const_;
 280 TargetState target_state_from_string(const char *s) _pure_;
 281
 282 const char *timer_state_to_string(TimerState i) _const_;
 283 TimerState timer_state_from_string(const char *s) _pure_;
 284
 285 const char *unit_dependency_to_string(UnitDependency i) _const_;
 286 UnitDependency unit_dependency_from_string(const char *s) _pure_;
 287
 288 const char* notify_access_to_string(NotifyAccess i) _const_;
 289 NotifyAccess notify_access_from_string(const char *s) _pure_;