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/* SPDX-License-Identifier: LGPL-2.1+ */
#pragma once
typedef struct Service Service;
typedef struct ServiceFDStore ServiceFDStore;
#include "exit-status.h"
#include "kill.h"
#include "path.h"
#include "ratelimit.h"
#include "socket.h"
#include "unit.h"
typedef enum ServiceRestart {
SERVICE_RESTART_NO,
SERVICE_RESTART_ON_SUCCESS,
SERVICE_RESTART_ON_FAILURE,
SERVICE_RESTART_ON_ABNORMAL,
SERVICE_RESTART_ON_WATCHDOG,
SERVICE_RESTART_ON_ABORT,
SERVICE_RESTART_ALWAYS,
_SERVICE_RESTART_MAX,
_SERVICE_RESTART_INVALID = -1
} ServiceRestart;
typedef enum ServiceType {
SERVICE_SIMPLE, /* we fork and go on right-away (i.e. modern socket activated daemons) */
SERVICE_FORKING, /* forks by itself (i.e. traditional daemons) */
SERVICE_ONESHOT, /* we fork and wait until the program finishes (i.e. programs like fsck which run and need to finish before we continue) */
SERVICE_DBUS, /* we fork and wait until a specific D-Bus name appears on the bus */
SERVICE_NOTIFY, /* we fork and wait until a daemon sends us a ready message with sd_notify() */
SERVICE_IDLE, /* much like simple, but delay exec() until all jobs are dispatched. */
SERVICE_EXEC, /* we fork and wait until we execute exec() (this means our own setup is waited for) */
_SERVICE_TYPE_MAX,
_SERVICE_TYPE_INVALID = -1
} ServiceType;
typedef enum ServiceExecCommand {
SERVICE_EXEC_START_PRE,
SERVICE_EXEC_START,
SERVICE_EXEC_START_POST,
SERVICE_EXEC_RELOAD,
SERVICE_EXEC_STOP,
SERVICE_EXEC_STOP_POST,
_SERVICE_EXEC_COMMAND_MAX,
_SERVICE_EXEC_COMMAND_INVALID = -1
} ServiceExecCommand;
typedef enum NotifyState {
NOTIFY_UNKNOWN,
NOTIFY_READY,
NOTIFY_RELOADING,
NOTIFY_STOPPING,
_NOTIFY_STATE_MAX,
_NOTIFY_STATE_INVALID = -1
} NotifyState;
/* The values of this enum are referenced in man/systemd.exec.xml and src/shared/bus-unit-util.c.
* Update those sources for each change to this enum. */
typedef enum ServiceResult {
SERVICE_SUCCESS,
SERVICE_FAILURE_RESOURCES, /* a bit of a misnomer, just our catch-all error for errnos we didn't expect */
SERVICE_FAILURE_PROTOCOL,
SERVICE_FAILURE_TIMEOUT,
SERVICE_FAILURE_EXIT_CODE,
SERVICE_FAILURE_SIGNAL,
SERVICE_FAILURE_CORE_DUMP,
SERVICE_FAILURE_WATCHDOG,
SERVICE_FAILURE_START_LIMIT_HIT,
_SERVICE_RESULT_MAX,
_SERVICE_RESULT_INVALID = -1
} ServiceResult;
struct ServiceFDStore {
Service *service;
int fd;
char *fdname;
sd_event_source *event_source;
LIST_FIELDS(ServiceFDStore, fd_store);
};
struct Service {
Unit meta;
ServiceType type;
ServiceRestart restart;
ExitStatusSet restart_prevent_status;
ExitStatusSet restart_force_status;
ExitStatusSet success_status;
/* If set we'll read the main daemon PID from this file */
char *pid_file;
usec_t restart_usec;
usec_t timeout_start_usec;
usec_t timeout_stop_usec;
usec_t runtime_max_usec;
dual_timestamp watchdog_timestamp;
usec_t watchdog_usec; /* the requested watchdog timeout in the unit file */
usec_t watchdog_original_usec; /* the watchdog timeout that was in effect when the unit was started, i.e. the timeout the forked off processes currently see */
usec_t watchdog_override_usec; /* the watchdog timeout requested by the service itself through sd_notify() */
bool watchdog_override_enable;
sd_event_source *watchdog_event_source;
ExecCommand* exec_command[_SERVICE_EXEC_COMMAND_MAX];
ExecContext exec_context;
KillContext kill_context;
CGroupContext cgroup_context;
ServiceState state, deserialized_state;
/* The exit status of the real main process */
ExecStatus main_exec_status;
/* The currently executed control process */
ExecCommand *control_command;
/* The currently executed main process, which may be NULL if
* the main process got started via forking mode and not by
* us */
ExecCommand *main_command;
/* The ID of the control command currently being executed */
ServiceExecCommand control_command_id;
/* Runtime data of the execution context */
ExecRuntime *exec_runtime;
DynamicCreds dynamic_creds;
pid_t main_pid, control_pid;
int socket_fd;
SocketPeer *peer;
bool socket_fd_selinux_context_net;
bool permissions_start_only;
bool root_directory_start_only;
bool remain_after_exit;
bool guess_main_pid;
/* If we shut down, remember why */
ServiceResult result;
ServiceResult reload_result;
bool main_pid_known:1;
bool main_pid_alien:1;
bool bus_name_good:1;
bool forbid_restart:1;
/* Keep restart intention between UNIT_FAILED and UNIT_ACTIVATING */
bool will_auto_restart:1;
bool start_timeout_defined:1;
char *bus_name;
char *bus_name_owner; /* unique name of the current owner */
char *status_text;
int status_errno;
UnitRef accept_socket;
sd_event_source *timer_event_source;
PathSpec *pid_file_pathspec;
NotifyAccess notify_access;
NotifyState notify_state;
sd_event_source *exec_fd_event_source;
ServiceFDStore *fd_store;
size_t n_fd_store;
unsigned n_fd_store_max;
unsigned n_keep_fd_store;
char *usb_function_descriptors;
char *usb_function_strings;
int stdin_fd;
int stdout_fd;
int stderr_fd;
unsigned n_restarts;
bool flush_n_restarts;
bool exec_fd_hot;
};
extern const UnitVTable service_vtable;
int service_set_socket_fd(Service *s, int fd, struct Socket *socket, bool selinux_context_net);
void service_close_socket_fd(Service *s);
const char* service_restart_to_string(ServiceRestart i) _const_;
ServiceRestart service_restart_from_string(const char *s) _pure_;
const char* service_type_to_string(ServiceType i) _const_;
ServiceType service_type_from_string(const char *s) _pure_;
const char* service_exec_command_to_string(ServiceExecCommand i) _const_;
ServiceExecCommand service_exec_command_from_string(const char *s) _pure_;
const char* notify_state_to_string(NotifyState i) _const_;
NotifyState notify_state_from_string(const char *s) _pure_;
const char* service_result_to_string(ServiceResult i) _const_;
ServiceResult service_result_from_string(const char *s) _pure_;
DEFINE_CAST(SERVICE, Service);
#define STATUS_TEXT_MAX (16U*1024U)
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