mirror of
https://github.com/AuxXxilium/eudev.git
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246 lines
6.5 KiB
C
246 lines
6.5 KiB
C
/*-*- Mode: C; c-basic-offset: 8 -*-*/
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#ifndef foounithfoo
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#define foounithfoo
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#include <stdbool.h>
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#include <stdlib.h>
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typedef union Unit Unit;
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typedef struct Meta Meta;
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typedef struct UnitVTable UnitVTable;
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typedef enum UnitType UnitType;
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typedef enum UnitLoadState UnitLoadState;
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typedef enum UnitActiveState UnitActiveState;
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typedef enum UnitDependency UnitDependency;
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#include "job.h"
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#include "manager.h"
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#include "set.h"
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#include "util.h"
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#include "list.h"
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#include "socket-util.h"
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#include "execute.h"
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#include "util.h"
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#define UNIT_NAME_MAX 128
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#define DEFAULT_TIMEOUT_USEC (20*USEC_PER_SEC)
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#define DEFAULT_RESTART_USEC (100*USEC_PER_MSEC)
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enum UnitType {
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UNIT_SERVICE = 0,
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UNIT_TIMER,
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UNIT_SOCKET,
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UNIT_TARGET,
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UNIT_DEVICE,
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UNIT_MOUNT,
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UNIT_AUTOMOUNT,
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UNIT_SNAPSHOT,
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_UNIT_TYPE_MAX,
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_UNIT_TYPE_INVALID = -1,
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};
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enum UnitLoadState {
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UNIT_STUB,
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UNIT_LOADED,
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UNIT_FAILED,
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_UNIT_LOAD_STATE_MAX
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};
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enum UnitActiveState {
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UNIT_ACTIVE,
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UNIT_ACTIVE_RELOADING,
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UNIT_INACTIVE,
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UNIT_ACTIVATING,
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UNIT_DEACTIVATING,
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_UNIT_ACTIVE_STATE_MAX
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};
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static inline bool UNIT_IS_ACTIVE_OR_RELOADING(UnitActiveState t) {
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return t == UNIT_ACTIVE || t == UNIT_ACTIVE_RELOADING;
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}
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static inline bool UNIT_IS_ACTIVE_OR_ACTIVATING(UnitActiveState t) {
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return t == UNIT_ACTIVE || t == UNIT_ACTIVATING || t == UNIT_ACTIVE_RELOADING;
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}
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static inline bool UNIT_IS_INACTIVE_OR_DEACTIVATING(UnitActiveState t) {
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return t == UNIT_INACTIVE || t == UNIT_DEACTIVATING;
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}
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enum UnitDependency {
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/* Positive dependencies */
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UNIT_REQUIRES,
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UNIT_SOFT_REQUIRES,
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UNIT_WANTS,
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UNIT_REQUISITE,
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UNIT_SOFT_REQUISITE,
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/* Inverse of the above */
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UNIT_REQUIRED_BY, /* inverse of 'requires' and 'requisite' is 'required_by' */
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UNIT_SOFT_REQUIRED_BY, /* inverse of 'soft_requires' and 'soft_requisite' is 'soft_required_by' */
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UNIT_WANTED_BY, /* inverse of 'wants' */
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/* Negative dependencies */
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UNIT_CONFLICTS, /* inverse of 'conflicts' is 'conflicts' */
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/* Order */
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UNIT_BEFORE, /* inverse of before is after and vice versa */
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UNIT_AFTER,
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_UNIT_DEPENDENCY_MAX,
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_UNIT_DEPENDENCY_INVALID = -1
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};
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struct Meta {
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Manager *manager;
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UnitType type;
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UnitLoadState load_state;
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char *id; /* One name is special because we use it for identification. Points to an entry in the names set */
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Set *names;
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Set *dependencies[_UNIT_DEPENDENCY_MAX];
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char *description;
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char *load_path; /* if loaded from a config file this is the primary path to it */
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/* If there is something to do with this unit, then this is
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* the job for it */
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Job *job;
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bool in_load_queue:1;
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usec_t active_enter_timestamp;
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usec_t active_exit_timestamp;
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/* Load queue */
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LIST_FIELDS(Meta, load_queue);
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};
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#include "service.h"
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#include "timer.h"
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#include "socket.h"
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#include "target.h"
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#include "device.h"
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#include "mount.h"
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#include "automount.h"
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#include "snapshot.h"
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union Unit {
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Meta meta;
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Service service;
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Timer timer;
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Socket socket;
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Target target;
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Device device;
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Mount mount;
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Automount automount;
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Snapshot snapshot;
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};
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struct UnitVTable {
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const char *suffix;
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int (*init)(Unit *u);
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void (*done)(Unit *u);
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void (*dump)(Unit *u, FILE *f, const char *prefix);
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int (*start)(Unit *u);
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int (*stop)(Unit *u);
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int (*reload)(Unit *u);
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bool (*can_reload)(Unit *u);
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/* Boils down the more complex internal state of this unit to
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* a simpler one that the engine can understand */
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UnitActiveState (*active_state)(Unit *u);
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void (*fd_event)(Unit *u, int fd, uint32_t events, Watch *w);
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void (*sigchld_event)(Unit *u, pid_t pid, int code, int status);
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void (*timer_event)(Unit *u, uint64_t n_elapsed, Watch *w);
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int (*enumerate)(Manager *m);
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void (*shutdown)(Manager *m);
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};
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extern const UnitVTable * const unit_vtable[_UNIT_TYPE_MAX];
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#define UNIT_VTABLE(u) unit_vtable[(u)->meta.type]
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/* For casting a unit into the various unit types */
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#define DEFINE_CAST(UPPERCASE, MixedCase) \
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static inline MixedCase* UPPERCASE(Unit *u) { \
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if (!u || u->meta.type != UNIT_##UPPERCASE) \
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return NULL; \
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\
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return (MixedCase*) u; \
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}
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/* For casting the various unit types into a unit */
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#define UNIT(u) ((Unit*) (u))
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DEFINE_CAST(SOCKET, Socket);
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DEFINE_CAST(TIMER, Timer);
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DEFINE_CAST(SERVICE, Service);
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DEFINE_CAST(TARGET, Target);
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DEFINE_CAST(DEVICE, Device);
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DEFINE_CAST(MOUNT, Mount);
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DEFINE_CAST(AUTOMOUNT, Automount);
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DEFINE_CAST(SNAPSHOT, Snapshot);
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UnitType unit_name_to_type(const char *n);
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bool unit_name_is_valid(const char *n);
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char *unit_name_change_suffix(const char *n, const char *suffix);
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Unit *unit_new(Manager *m);
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void unit_free(Unit *u);
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int unit_add_name(Unit *u, const char *name);
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int unit_add_dependency(Unit *u, UnitDependency d, Unit *other);
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int unit_add_dependency_by_name(Unit *u, UnitDependency d, const char *name);
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int unit_choose_id(Unit *u, const char *name);
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void unit_add_to_load_queue(Unit *u);
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int unit_merge(Unit *u, Unit *other);
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int unit_load_fragment_and_dropin(Unit *u);
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int unit_load(Unit *unit);
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const char* unit_id(Unit *u);
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const char *unit_description(Unit *u);
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UnitActiveState unit_active_state(Unit *u);
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void unit_dump(Unit *u, FILE *f, const char *prefix);
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bool unit_can_reload(Unit *u);
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bool unit_can_start(Unit *u);
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int unit_start(Unit *u);
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int unit_stop(Unit *u);
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int unit_reload(Unit *u);
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void unit_notify(Unit *u, UnitActiveState os, UnitActiveState ns);
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int unit_watch_fd(Unit *u, int fd, uint32_t events, Watch *w);
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void unit_unwatch_fd(Unit *u, Watch *w);
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int unit_watch_pid(Unit *u, pid_t pid);
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void unit_unwatch_pid(Unit *u, pid_t pid);
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int unit_watch_timer(Unit *u, usec_t delay, Watch *w);
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void unit_unwatch_timer(Unit *u, Watch *w);
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bool unit_job_is_applicable(Unit *u, JobType j);
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const char *unit_path(void);
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int set_unit_path(const char *p);
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char *unit_name_escape_path(const char *prefix, const char *path, const char *suffix);
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#endif
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