Isolation of udev code from remaining systemd

This commit is a first attempt to isolate the udev code from the
remaining code base.  It intentionally does not modify any files
but purely delete files which, on a first examination, appear to
not be needed.  This is a sweeping commit which may easily have
missed needed code.  Files can be retrieved by doing a checkout
from the previous commit:

 git checkout 2944f347d0 -- <filename>

1 files changed, 0 insertions, 551 deletions

diff --git a/src/core/unit.h b/src/core/unit.h
deleted file mode 100644
index bf961c2aac..0000000000
--- a/src/core/unit.h
+++ /dev/null
@@ -1,551 +0,0 @@
-/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
-
-#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/>.
-***/
-
-#include <stdbool.h>
-#include <stdlib.h>
-
-typedef struct Unit Unit;
-typedef struct UnitVTable UnitVTable;
-typedef enum UnitActiveState UnitActiveState;
-typedef enum UnitDependency UnitDependency;
-typedef struct UnitRef UnitRef;
-typedef struct UnitStatusMessageFormats UnitStatusMessageFormats;
-
-#include "set.h"
-#include "util.h"
-#include "list.h"
-#include "socket-util.h"
-#include "execute.h"
-#include "condition.h"
-#include "install.h"
-#include "unit-name.h"
-
-enum UnitActiveState {
-        UNIT_ACTIVE,
-        UNIT_RELOADING,
-        UNIT_INACTIVE,
-        UNIT_FAILED,
-        UNIT_ACTIVATING,
-        UNIT_DEACTIVATING,
-        _UNIT_ACTIVE_STATE_MAX,
-        _UNIT_ACTIVE_STATE_INVALID = -1
-};
-
-static inline bool UNIT_IS_ACTIVE_OR_RELOADING(UnitActiveState t) {
-        return t == UNIT_ACTIVE || t == UNIT_RELOADING;
-}
-
-static inline bool UNIT_IS_ACTIVE_OR_ACTIVATING(UnitActiveState t) {
-        return t == UNIT_ACTIVE || t == UNIT_ACTIVATING || t == UNIT_RELOADING;
-}
-
-static inline bool UNIT_IS_INACTIVE_OR_DEACTIVATING(UnitActiveState t) {
-        return t == UNIT_INACTIVE || t == UNIT_FAILED || t == UNIT_DEACTIVATING;
-}
-
-static inline bool UNIT_IS_INACTIVE_OR_FAILED(UnitActiveState t) {
-        return t == UNIT_INACTIVE || t == UNIT_FAILED;
-}
-
-enum UnitDependency {
-        /* Positive dependencies */
-        UNIT_REQUIRES,
-        UNIT_REQUIRES_OVERRIDABLE,
-        UNIT_REQUISITE,
-        UNIT_REQUISITE_OVERRIDABLE,
-        UNIT_WANTS,
-        UNIT_BINDS_TO,
-        UNIT_PART_OF,
-
-        /* Inverse of the above */
-        UNIT_REQUIRED_BY,             /* inverse of 'requires' and 'requisite' is 'required_by' */
-        UNIT_REQUIRED_BY_OVERRIDABLE, /* inverse of 'requires_overridable' and 'requisite_overridable' is 'soft_required_by' */
-        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,
-
-        /* Reference information for GC logic */
-        UNIT_REFERENCES,              /* Inverse of 'references' is 'referenced_by' */
-        UNIT_REFERENCED_BY,
-
-        _UNIT_DEPENDENCY_MAX,
-        _UNIT_DEPENDENCY_INVALID = -1
-};
-
-#include "manager.h"
-#include "job.h"
-#include "cgroup.h"
-#include "cgroup-attr.h"
-
-struct Unit {
-        Manager *manager;
-
-        UnitType type;
-        UnitLoadState load_state;
-        Unit *merged_into;
-
-        char *id; /* One name is special because we use it for identification. Points to an entry in the names set */
-        char *instance;
-
-        Set *names;
-        Set *dependencies[_UNIT_DEPENDENCY_MAX];
-
-        char **requires_mounts_for;
-
-        char *description;
-        char **documentation;
-
-        char *fragment_path; /* if loaded from a config file this is the primary path to it */
-        char *source_path; /* if converted, the source file */
-        usec_t fragment_mtime;
-        usec_t source_mtime;
-
-        /* If there is something to do with this unit, then this is the installed job for it */
-        Job *job;
-
-        /* JOB_NOP jobs are special and can be installed without disturbing the real job. */
-        Job *nop_job;
-
-        usec_t job_timeout;
-
-        /* References to this */
-        LIST_HEAD(UnitRef, refs);
-
-        /* Conditions to check */
-        LIST_HEAD(Condition, conditions);
-
-        dual_timestamp condition_timestamp;
-
-        dual_timestamp inactive_exit_timestamp;
-        dual_timestamp active_enter_timestamp;
-        dual_timestamp active_exit_timestamp;
-        dual_timestamp inactive_enter_timestamp;
-
-        /* Counterparts in the cgroup filesystem */
-        CGroupBonding *cgroup_bondings;
-        CGroupAttribute *cgroup_attributes;
-
-        /* Per type list */
-        LIST_FIELDS(Unit, units_by_type);
-
-        /* All units which have requires_mounts_for set */
-        LIST_FIELDS(Unit, has_requires_mounts_for);
-
-        /* Load queue */
-        LIST_FIELDS(Unit, load_queue);
-
-        /* D-Bus queue */
-        LIST_FIELDS(Unit, dbus_queue);
-
-        /* Cleanup queue */
-        LIST_FIELDS(Unit, cleanup_queue);
-
-        /* GC queue */
-        LIST_FIELDS(Unit, gc_queue);
-
-        /* Used during GC sweeps */
-        unsigned gc_marker;
-
-        /* When deserializing, temporarily store the job type for this
-         * unit here, if there was a job scheduled.
-         * Only for deserializing from a legacy version. New style uses full
-         * serialized jobs. */
-        int deserialized_job; /* This is actually of type JobType */
-
-        /* Error code when we didn't manage to load the unit (negative) */
-        int load_error;
-
-        /* Cached unit file state */
-        UnitFileState unit_file_state;
-
-        /* Garbage collect us we nobody wants or requires us anymore */
-        bool stop_when_unneeded;
-
-        /* Create default dependencies */
-        bool default_dependencies;
-
-        /* Refuse manual starting, allow starting only indirectly via dependency. */
-        bool refuse_manual_start;
-
-        /* Don't allow the user to stop this unit manually, allow stopping only indirectly via dependency. */
-        bool refuse_manual_stop;
-
-        /* Allow isolation requests */
-        bool allow_isolate;
-
-        /* Isolate OnFailure unit */
-        bool on_failure_isolate;
-
-        /* Ignore this unit when isolating */
-        bool ignore_on_isolate;
-
-        /* Ignore this unit when snapshotting */
-        bool ignore_on_snapshot;
-
-        /* Did the last condition check succeed? */
-        bool condition_result;
-
-        bool in_load_queue:1;
-        bool in_dbus_queue:1;
-        bool in_cleanup_queue:1;
-        bool in_gc_queue:1;
-
-        bool sent_dbus_new_signal:1;
-
-        bool no_gc:1;
-
-        bool in_audit:1;
-};
-
-struct UnitRef {
-        /* Keeps tracks of references to a unit. This is useful so
-         * that we can merge two units if necessary and correct all
-         * references to them */
-
-        Unit* unit;
-        LIST_FIELDS(UnitRef, refs);
-};
-
-struct UnitStatusMessageFormats {
-        const char *starting_stopping[2];
-        const char *finished_start_job[_JOB_RESULT_MAX];
-        const char *finished_stop_job[_JOB_RESULT_MAX];
-};
-
-#include "service.h"
-#include "timer.h"
-#include "socket.h"
-#include "target.h"
-#include "device.h"
-#include "mount.h"
-#include "automount.h"
-#include "snapshot.h"
-#include "swap.h"
-#include "path.h"
-
-struct UnitVTable {
-        /* How much memory does an object of this unit type need */
-        size_t object_size;
-
-        /* If greater than 0, the offset into the object where
-         * ExecContext is found, if the unit type has that */
-        size_t exec_context_offset;
-
-        /* Config file sections this unit type understands, separated
-         * by NUL chars */
-        const char *sections;
-
-        /* This should reset all type-specific variables. This should
-         * not allocate memory, and is called with zero-initialized
-         * data. It should hence only initialize variables that need
-         * to be set != 0. */
-        void (*init)(Unit *u);
-
-        /* This should free all type-specific variables. It should be
-         * idempotent. */
-        void (*done)(Unit *u);
-
-        /* Actually load data from disk. This may fail, and should set
-         * load_state to UNIT_LOADED, UNIT_MERGED or leave it at
-         * UNIT_STUB if no configuration could be found. */
-        int (*load)(Unit *u);
-
-        /* If a lot of units got created via enumerate(), this is
-         * where to actually set the state and call unit_notify(). */
-        int (*coldplug)(Unit *u);
-
-        void (*dump)(Unit *u, FILE *f, const char *prefix);
-
-        int (*start)(Unit *u);
-        int (*stop)(Unit *u);
-        int (*reload)(Unit *u);
-
-        int (*kill)(Unit *u, KillWho w, int signo, DBusError *error);
-
-        bool (*can_reload)(Unit *u);
-
-        /* Write all data that cannot be restored from other sources
-         * away using unit_serialize_item() */
-        int (*serialize)(Unit *u, FILE *f, FDSet *fds);
-
-        /* Restore one item from the serialization */
-        int (*deserialize_item)(Unit *u, const char *key, const char *data, FDSet *fds);
-
-        /* Boils down the more complex internal state of this unit to
-         * a simpler one that the engine can understand */
-        UnitActiveState (*active_state)(Unit *u);
-
-        /* Returns the substate specific to this unit type as
-         * string. This is purely information so that we can give the
-         * user a more fine grained explanation in which actual state a
-         * unit is in. */
-        const char* (*sub_state_to_string)(Unit *u);
-
-        /* Return true when there is reason to keep this entry around
-         * even nothing references it and it isn't active in any
-         * way */
-        bool (*check_gc)(Unit *u);
-
-        /* Return true when this unit is suitable for snapshotting */
-        bool (*check_snapshot)(Unit *u);
-
-        void (*fd_event)(Unit *u, int fd, uint32_t events, Watch *w);
-        void (*sigchld_event)(Unit *u, pid_t pid, int code, int status);
-        void (*timer_event)(Unit *u, uint64_t n_elapsed, Watch *w);
-
-        /* Reset failed state if we are in failed state */
-        void (*reset_failed)(Unit *u);
-
-        /* Called whenever any of the cgroups this unit watches for
-         * ran empty */
-        void (*cgroup_notify_empty)(Unit *u);
-
-        /* Called whenever a process of this unit sends us a message */
-        void (*notify_message)(Unit *u, pid_t pid, char **tags);
-
-        /* Called whenever a name thus Unit registered for comes or
-         * goes away. */
-        void (*bus_name_owner_change)(Unit *u, const char *name, const char *old_owner, const char *new_owner);
-
-        /* Called whenever a bus PID lookup finishes */
-        void (*bus_query_pid_done)(Unit *u, const char *name, pid_t pid);
-
-        /* Called for each message received on the bus */
-        DBusHandlerResult (*bus_message_handler)(Unit *u, DBusConnection *c, DBusMessage *message);
-
-        /* Return the unit this unit is following */
-        Unit *(*following)(Unit *u);
-
-        /* Return the set of units that are following each other */
-        int (*following_set)(Unit *u, Set **s);
-
-        /* This is called for each unit type and should be used to
-         * enumerate existing devices and load them. However,
-         * everything that is loaded here should still stay in
-         * inactive state. It is the job of the coldplug() call above
-         * to put the units into the initial state.  */
-        int (*enumerate)(Manager *m);
-
-        /* Type specific cleanups. */
-        void (*shutdown)(Manager *m);
-
-        /* When sending out PropertiesChanged signal, which properties
-         * shall be invalidated? This is a NUL separated list of
-         * strings, to minimize relocations a little. */
-        const char *bus_invalidating_properties;
-
-        /* The interface name */
-        const char *bus_interface;
-
-        UnitStatusMessageFormats status_message_formats;
-
-        /* Can units of this type have multiple names? */
-        bool no_alias:1;
-
-        /* Instances make no sense for this type */
-        bool no_instances:1;
-
-        /* Exclude from automatic gc */
-        bool no_gc:1;
-};
-
-extern const UnitVTable * const unit_vtable[_UNIT_TYPE_MAX];
-
-#define UNIT_VTABLE(u) unit_vtable[(u)->type]
-
-/* For casting a unit into the various unit types */
-#define DEFINE_CAST(UPPERCASE, MixedCase)                               \
-        static inline MixedCase* UPPERCASE(Unit *u) {                   \
-                if (_unlikely_(!u || u->type != UNIT_##UPPERCASE))      \
-                        return NULL;                                    \
-                                                                        \
-                return (MixedCase*) u;                                  \
-        }
-
-/* For casting the various unit types into a unit */
-#define UNIT(u) (&(u)->meta)
-
-DEFINE_CAST(SOCKET, Socket);
-DEFINE_CAST(TIMER, Timer);
-DEFINE_CAST(SERVICE, Service);
-DEFINE_CAST(TARGET, Target);
-DEFINE_CAST(DEVICE, Device);
-DEFINE_CAST(MOUNT, Mount);
-DEFINE_CAST(AUTOMOUNT, Automount);
-DEFINE_CAST(SNAPSHOT, Snapshot);
-DEFINE_CAST(SWAP, Swap);
-DEFINE_CAST(PATH, Path);
-
-Unit *unit_new(Manager *m, size_t size);
-void unit_free(Unit *u);
-
-int unit_add_name(Unit *u, const char *name);
-
-int unit_add_dependency(Unit *u, UnitDependency d, Unit *other, bool add_reference);
-int unit_add_two_dependencies(Unit *u, UnitDependency d, UnitDependency e, Unit *other, bool add_reference);
-
-int unit_add_dependency_by_name(Unit *u, UnitDependency d, const char *name, const char *filename, bool add_reference);
-int unit_add_two_dependencies_by_name(Unit *u, UnitDependency d, UnitDependency e, const char *name, const char *path, bool add_reference);
-
-int unit_add_dependency_by_name_inverse(Unit *u, UnitDependency d, const char *name, const char *filename, bool add_reference);
-int unit_add_two_dependencies_by_name_inverse(Unit *u, UnitDependency d, UnitDependency e, const char *name, const char *path, bool add_reference);
-
-int unit_add_exec_dependencies(Unit *u, ExecContext *c);
-
-int unit_add_cgroup(Unit *u, CGroupBonding *b);
-int unit_add_cgroup_from_text(Unit *u, const char *name);
-int unit_add_default_cgroups(Unit *u);
-CGroupBonding* unit_get_default_cgroup(Unit *u);
-int unit_add_cgroup_attribute(Unit *u, const char *controller, const char *name, const char *value, CGroupAttributeMapCallback map_callback);
-
-int unit_choose_id(Unit *u, const char *name);
-int unit_set_description(Unit *u, const char *description);
-
-bool unit_check_gc(Unit *u);
-
-void unit_add_to_load_queue(Unit *u);
-void unit_add_to_dbus_queue(Unit *u);
-void unit_add_to_cleanup_queue(Unit *u);
-void unit_add_to_gc_queue(Unit *u);
-
-int unit_merge(Unit *u, Unit *other);
-int unit_merge_by_name(Unit *u, const char *other);
-
-Unit *unit_follow_merge(Unit *u);
-
-int unit_load_fragment_and_dropin(Unit *u);
-int unit_load_fragment_and_dropin_optional(Unit *u);
-int unit_load(Unit *unit);
-
-const char *unit_description(Unit *u);
-
-bool unit_has_name(Unit *u, const char *name);
-
-UnitActiveState unit_active_state(Unit *u);
-
-const char* unit_sub_state_to_string(Unit *u);
-
-void unit_dump(Unit *u, FILE *f, const char *prefix);
-
-bool unit_can_reload(Unit *u);
-bool unit_can_start(Unit *u);
-bool unit_can_isolate(Unit *u);
-
-int unit_start(Unit *u);
-int unit_stop(Unit *u);
-int unit_reload(Unit *u);
-
-int unit_kill(Unit *u, KillWho w, int signo, DBusError *error);
-
-void unit_notify(Unit *u, UnitActiveState os, UnitActiveState ns, bool reload_success);
-
-int unit_watch_fd(Unit *u, int fd, uint32_t events, Watch *w);
-void unit_unwatch_fd(Unit *u, Watch *w);
-
-int unit_watch_pid(Unit *u, pid_t pid);
-void unit_unwatch_pid(Unit *u, pid_t pid);
-
-int unit_watch_timer(Unit *u, usec_t delay, Watch *w);
-void unit_unwatch_timer(Unit *u, Watch *w);
-
-int unit_watch_bus_name(Unit *u, const char *name);
-void unit_unwatch_bus_name(Unit *u, const char *name);
-
-bool unit_job_is_applicable(Unit *u, JobType j);
-
-int set_unit_path(const char *p);
-
-char *unit_dbus_path(Unit *u);
-
-int unit_load_related_unit(Unit *u, const char *type, Unit **_found);
-int unit_get_related_unit(Unit *u, const char *type, Unit **_found);
-
-bool unit_can_serialize(Unit *u);
-int unit_serialize(Unit *u, FILE *f, FDSet *fds, bool serialize_jobs);
-void unit_serialize_item_format(Unit *u, FILE *f, const char *key, const char *value, ...) _printf_attr_(4,5);
-void unit_serialize_item(Unit *u, FILE *f, const char *key, const char *value);
-int unit_deserialize(Unit *u, FILE *f, FDSet *fds);
-
-int unit_add_node_link(Unit *u, const char *what, bool wants);
-
-int unit_coldplug(Unit *u);
-
-void unit_status_printf(Unit *u, const char *status, const char *format, ...);
-
-bool unit_need_daemon_reload(Unit *u);
-
-void unit_reset_failed(Unit *u);
-
-Unit *unit_following(Unit *u);
-
-bool unit_pending_inactive(Unit *u);
-bool unit_pending_active(Unit *u);
-
-int unit_add_default_target_dependency(Unit *u, Unit *target);
-
-char *unit_default_cgroup_path(Unit *u);
-
-int unit_following_set(Unit *u, Set **s);
-
-void unit_trigger_on_failure(Unit *u);
-
-bool unit_condition_test(Unit *u);
-
-UnitFileState unit_get_unit_file_state(Unit *u);
-
-Unit* unit_ref_set(UnitRef *ref, Unit *u);
-void unit_ref_unset(UnitRef *ref);
-
-#define UNIT_DEREF(ref) ((ref).unit)
-
-int unit_add_one_mount_link(Unit *u, Mount *m);
-int unit_add_mount_links(Unit *u);
-
-int unit_exec_context_defaults(Unit *u, ExecContext *c);
-
-ExecContext *unit_get_exec_context(Unit *u);
-
-const char *unit_active_state_to_string(UnitActiveState i);
-UnitActiveState unit_active_state_from_string(const char *s);
-
-const char *unit_dependency_to_string(UnitDependency i);
-UnitDependency unit_dependency_from_string(const char *s);