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/*
* Copyright (c) 2019-2020, Sergey Bugaev <bugaevc@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#pragma once
#include <AK/DeprecatedString.h>
#include <AK/RefPtr.h>
#include <LibCore/Account.h>
#include <LibCore/ElapsedTimer.h>
#include <LibCore/Notifier.h>
#include <LibCore/Object.h>
class Service final : public Core::Object {
C_OBJECT_ABSTRACT(Service)
public:
static ErrorOr<NonnullRefPtr<Service>> try_create(Core::ConfigFile const& config, StringView name);
~Service();
bool is_enabled() const;
ErrorOr<void> activate();
ErrorOr<void> did_exit(int exit_code);
static Service* find_by_pid(pid_t);
private:
Service(Core::ConfigFile const&, StringView name);
ErrorOr<void> spawn(int socket_fd = -1);
ErrorOr<void> determine_account(int fd);
ErrorOr<void> change_privileges();
/// SocketDescriptor describes the details of a single socket that was
/// requested by a service.
struct SocketDescriptor {
/// The path of the socket.
DeprecatedString path;
/// File descriptor of the socket. -1 if the socket hasn't been opened.
int fd { -1 };
/// File permissions of the socket.
mode_t permissions;
};
// Path to the executable. By default this is /bin/{m_name}.
DeprecatedString m_executable_path;
// Extra arguments, starting from argv[1], to pass when exec'ing.
DeprecatedString m_extra_arguments;
// File path to open as stdio fds.
DeprecatedString m_stdio_file_path;
int m_priority { 1 };
// Whether we should re-launch it if it exits.
bool m_keep_alive { false };
// Whether we should accept connections on the socket and pass the accepted
// (and not listening) socket to the service. This requires a multi-instance
// service.
bool m_accept_socket_connections { false };
// Whether we should only spawn this service once somebody connects to the socket.
bool m_lazy;
// The name of the user we should run this service as.
DeprecatedString m_user;
// The working directory in which to spawn the service.
DeprecatedString m_working_directory;
// System modes in which to run this service. By default, this is the graphical mode.
Vector<DeprecatedString> m_system_modes;
// Whether several instances of this service can run at once.
bool m_multi_instance { false };
// Environment variables to pass to the service.
DeprecatedString m_environment;
// Socket descriptors for this service.
Vector<SocketDescriptor> m_sockets;
// The resolved user account to run this service as.
Optional<Core::Account> m_account;
bool m_must_login { false };
// For single-instance services, PID of the running instance of this service.
pid_t m_pid { -1 };
RefPtr<Core::Notifier> m_socket_notifier;
// Timer since we last spawned the service.
Core::ElapsedTimer m_run_timer;
// How many times we have tried to restart this service, only counting those
// times where it has exited unsuccessfully and too quickly.
int m_restart_attempts { 0 };
ErrorOr<void> setup_socket(SocketDescriptor&);
ErrorOr<void> setup_sockets();
void setup_notifier();
ErrorOr<void> handle_socket_connection();
};
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