1 files changed, 284 insertions, 0 deletions
diff --git a/src/basic/unit-def.h b/src/basic/unit-def.h
new file mode 100644
index 0000000..85f3e42
--- /dev/null
+++ b/src/basic/unit-def.h
@@ -0,0 +1,284 @@
+/* SPDX-License-Identifier: LGPL-2.1+ */
+#pragma once
+
+#include <stdbool.h>
+
+#include "macro.h"
+
+typedef enum UnitType {
+        UNIT_SERVICE = 0,
+        UNIT_SOCKET,
+        UNIT_TARGET,
+        UNIT_DEVICE,
+        UNIT_MOUNT,
+        UNIT_AUTOMOUNT,
+        UNIT_SWAP,
+        UNIT_TIMER,
+        UNIT_PATH,
+        UNIT_SLICE,
+        UNIT_SCOPE,
+        _UNIT_TYPE_MAX,
+        _UNIT_TYPE_INVALID = -1
+} UnitType;
+
+typedef enum UnitLoadState {
+        UNIT_STUB = 0,
+        UNIT_LOADED,
+        UNIT_NOT_FOUND,    /* error condition #1: unit file not found */
+        UNIT_BAD_SETTING,  /* error condition #2: we couldn't parse some essential unit file setting */
+        UNIT_ERROR,        /* error condition #3: other "system" error, catchall for the rest */
+        UNIT_MERGED,
+        UNIT_MASKED,
+        _UNIT_LOAD_STATE_MAX,
+        _UNIT_LOAD_STATE_INVALID = -1
+} UnitLoadState;
+
+typedef enum UnitActiveState {
+        UNIT_ACTIVE,
+        UNIT_RELOADING,
+        UNIT_INACTIVE,
+        UNIT_FAILED,
+        UNIT_ACTIVATING,
+        UNIT_DEACTIVATING,
+        _UNIT_ACTIVE_STATE_MAX,
+        _UNIT_ACTIVE_STATE_INVALID = -1
+} UnitActiveState;
+
+typedef enum AutomountState {
+        AUTOMOUNT_DEAD,
+        AUTOMOUNT_WAITING,
+        AUTOMOUNT_RUNNING,
+        AUTOMOUNT_FAILED,
+        _AUTOMOUNT_STATE_MAX,
+        _AUTOMOUNT_STATE_INVALID = -1
+} AutomountState;
+
+/* We simply watch devices, we cannot plug/unplug them. That
+ * simplifies the state engine greatly */
+typedef enum DeviceState {
+        DEVICE_DEAD,
+        DEVICE_TENTATIVE, /* mounted or swapped, but not (yet) announced by udev */
+        DEVICE_PLUGGED,   /* announced by udev */
+        _DEVICE_STATE_MAX,
+        _DEVICE_STATE_INVALID = -1
+} DeviceState;
+
+typedef enum MountState {
+        MOUNT_DEAD,
+        MOUNT_MOUNTING,               /* /usr/bin/mount is running, but the mount is not done yet. */
+        MOUNT_MOUNTING_DONE,          /* /usr/bin/mount is running, and the mount is done. */
+        MOUNT_MOUNTED,
+        MOUNT_REMOUNTING,
+        MOUNT_UNMOUNTING,
+        MOUNT_REMOUNTING_SIGTERM,
+        MOUNT_REMOUNTING_SIGKILL,
+        MOUNT_UNMOUNTING_SIGTERM,
+        MOUNT_UNMOUNTING_SIGKILL,
+        MOUNT_FAILED,
+        _MOUNT_STATE_MAX,
+        _MOUNT_STATE_INVALID = -1
+} MountState;
+
+typedef enum PathState {
+        PATH_DEAD,
+        PATH_WAITING,
+        PATH_RUNNING,
+        PATH_FAILED,
+        _PATH_STATE_MAX,
+        _PATH_STATE_INVALID = -1
+} PathState;
+
+typedef enum ScopeState {
+        SCOPE_DEAD,
+        SCOPE_RUNNING,
+        SCOPE_ABANDONED,
+        SCOPE_STOP_SIGTERM,
+        SCOPE_STOP_SIGKILL,
+        SCOPE_FAILED,
+        _SCOPE_STATE_MAX,
+        _SCOPE_STATE_INVALID = -1
+} ScopeState;
+
+typedef enum ServiceState {
+        SERVICE_DEAD,
+        SERVICE_START_PRE,
+        SERVICE_START,
+        SERVICE_START_POST,
+        SERVICE_RUNNING,
+        SERVICE_EXITED,            /* Nothing is running anymore, but RemainAfterExit is true hence this is OK */
+        SERVICE_RELOAD,
+        SERVICE_STOP,              /* No STOP_PRE state, instead just register multiple STOP executables */
+        SERVICE_STOP_WATCHDOG,
+        SERVICE_STOP_SIGTERM,
+        SERVICE_STOP_SIGKILL,
+        SERVICE_STOP_POST,
+        SERVICE_FINAL_SIGTERM,     /* In case the STOP_POST executable hangs, we shoot that down, too */
+        SERVICE_FINAL_SIGKILL,
+        SERVICE_FAILED,
+        SERVICE_AUTO_RESTART,
+        _SERVICE_STATE_MAX,
+        _SERVICE_STATE_INVALID = -1
+} ServiceState;
+
+typedef enum SliceState {
+        SLICE_DEAD,
+        SLICE_ACTIVE,
+        _SLICE_STATE_MAX,
+        _SLICE_STATE_INVALID = -1
+} SliceState;
+
+typedef enum SocketState {
+        SOCKET_DEAD,
+        SOCKET_START_PRE,
+        SOCKET_START_CHOWN,
+        SOCKET_START_POST,
+        SOCKET_LISTENING,
+        SOCKET_RUNNING,
+        SOCKET_STOP_PRE,
+        SOCKET_STOP_PRE_SIGTERM,
+        SOCKET_STOP_PRE_SIGKILL,
+        SOCKET_STOP_POST,
+        SOCKET_FINAL_SIGTERM,
+        SOCKET_FINAL_SIGKILL,
+        SOCKET_FAILED,
+        _SOCKET_STATE_MAX,
+        _SOCKET_STATE_INVALID = -1
+} SocketState;
+
+typedef enum SwapState {
+        SWAP_DEAD,
+        SWAP_ACTIVATING,               /* /sbin/swapon is running, but the swap not yet enabled. */
+        SWAP_ACTIVATING_DONE,          /* /sbin/swapon is running, and the swap is done. */
+        SWAP_ACTIVE,
+        SWAP_DEACTIVATING,
+        SWAP_DEACTIVATING_SIGTERM,
+        SWAP_DEACTIVATING_SIGKILL,
+        SWAP_FAILED,
+        _SWAP_STATE_MAX,
+        _SWAP_STATE_INVALID = -1
+} SwapState;
+
+typedef enum TargetState {
+        TARGET_DEAD,
+        TARGET_ACTIVE,
+        _TARGET_STATE_MAX,
+        _TARGET_STATE_INVALID = -1
+} TargetState;
+
+typedef enum TimerState {
+        TIMER_DEAD,
+        TIMER_WAITING,
+        TIMER_RUNNING,
+        TIMER_ELAPSED,
+        TIMER_FAILED,
+        _TIMER_STATE_MAX,
+        _TIMER_STATE_INVALID = -1
+} TimerState;
+
+typedef enum UnitDependency {
+        /* Positive dependencies */
+        UNIT_REQUIRES,
+        UNIT_REQUISITE,
+        UNIT_WANTS,
+        UNIT_BINDS_TO,
+        UNIT_PART_OF,
+
+        /* Inverse of the above */
+        UNIT_REQUIRED_BY,             /* inverse of 'requires' is 'required_by' */
+        UNIT_REQUISITE_OF,            /* inverse of 'requisite' is 'requisite_of' */
+        UNIT_WANTED_BY,               /* inverse of 'wants' */
+        UNIT_BOUND_BY,                /* inverse of 'binds_to' */
+        UNIT_CONSISTS_OF,             /* inverse of 'part_of' */
+
+        /* Negative dependencies */
+        UNIT_CONFLICTS,               /* inverse of 'conflicts' is 'conflicted_by' */
+        UNIT_CONFLICTED_BY,
+
+        /* Order */
+        UNIT_BEFORE,                  /* inverse of 'before' is 'after' and vice versa */
+        UNIT_AFTER,
+
+        /* On Failure */
+        UNIT_ON_FAILURE,
+
+        /* Triggers (i.e. a socket triggers a service) */
+        UNIT_TRIGGERS,
+        UNIT_TRIGGERED_BY,
+
+        /* Propagate reloads */
+        UNIT_PROPAGATES_RELOAD_TO,
+        UNIT_RELOAD_PROPAGATED_FROM,
+
+        /* Joins namespace of */
+        UNIT_JOINS_NAMESPACE_OF,
+
+        /* Reference information for GC logic */
+        UNIT_REFERENCES,              /* Inverse of 'references' is 'referenced_by' */
+        UNIT_REFERENCED_BY,
+
+        _UNIT_DEPENDENCY_MAX,
+        _UNIT_DEPENDENCY_INVALID = -1
+} UnitDependency;
+
+typedef enum NotifyAccess {
+        NOTIFY_NONE,
+        NOTIFY_ALL,
+        NOTIFY_MAIN,
+        NOTIFY_EXEC,
+        _NOTIFY_ACCESS_MAX,
+        _NOTIFY_ACCESS_INVALID = -1
+} NotifyAccess;
+
+char *unit_dbus_path_from_name(const char *name);
+int unit_name_from_dbus_path(const char *path, char **name);
+
+const char* unit_dbus_interface_from_type(UnitType t);
+const char *unit_dbus_interface_from_name(const char *name);
+
+const char *unit_type_to_string(UnitType i) _const_;
+UnitType unit_type_from_string(const char *s) _pure_;
+
+const char *unit_load_state_to_string(UnitLoadState i) _const_;
+UnitLoadState unit_load_state_from_string(const char *s) _pure_;
+
+const char *unit_active_state_to_string(UnitActiveState i) _const_;
+UnitActiveState unit_active_state_from_string(const char *s) _pure_;
+
+const char* automount_state_to_string(AutomountState i) _const_;
+AutomountState automount_state_from_string(const char *s) _pure_;
+
+const char* device_state_to_string(DeviceState i) _const_;
+DeviceState device_state_from_string(const char *s) _pure_;
+
+const char* mount_state_to_string(MountState i) _const_;
+MountState mount_state_from_string(const char *s) _pure_;
+
+const char* path_state_to_string(PathState i) _const_;
+PathState path_state_from_string(const char *s) _pure_;
+
+const char* scope_state_to_string(ScopeState i) _const_;
+ScopeState scope_state_from_string(const char *s) _pure_;
+
+const char* service_state_to_string(ServiceState i) _const_;
+ServiceState service_state_from_string(const char *s) _pure_;
+
+const char* slice_state_to_string(SliceState i) _const_;
+SliceState slice_state_from_string(const char *s) _pure_;
+
+const char* socket_state_to_string(SocketState i) _const_;
+SocketState socket_state_from_string(const char *s) _pure_;
+
+const char* swap_state_to_string(SwapState i) _const_;
+SwapState swap_state_from_string(const char *s) _pure_;
+
+const char* target_state_to_string(TargetState i) _const_;
+TargetState target_state_from_string(const char *s) _pure_;
+
+const char *timer_state_to_string(TimerState i) _const_;
+TimerState timer_state_from_string(const char *s) _pure_;
+
+const char *unit_dependency_to_string(UnitDependency i) _const_;
+UnitDependency unit_dependency_from_string(const char *s) _pure_;
+
+const char* notify_access_to_string(NotifyAccess i) _const_;
+NotifyAccess notify_access_from_string(const char *s) _pure_;