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/*
* Copyright (c) 2019-2020, Sergey Bugaev <bugaevc@serenityos.org>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#pragma once
#include <AK/RefPtr.h>
#include <AK/String.h>
#include <LibCore/ElapsedTimer.h>
#include <LibCore/Notifier.h>
#include <LibCore/Object.h>
class Service final : public Core::Object {
C_OBJECT(Service)
public:
bool is_enabled() const;
void activate();
void did_exit(int exit_code);
static Service* find_by_pid(pid_t);
void save_to(AK::JsonObject&) override;
private:
Service(const Core::ConfigFile&, const StringView& name);
void spawn(int socket_fd = -1);
// Path to the executable. By default this is /bin/{m_name}.
String m_executable_path;
// Extra arguments, starting from argv[1], to pass when exec'ing.
Vector<String> m_extra_arguments;
// File path to open as stdio fds.
String m_stdio_file_path;
int m_priority { 1 };
// Whether we should re-launch it if it exits.
bool m_keep_alive { false };
// Path to the socket to create and listen on on behalf of this service.
String m_socket_path;
// File system permissions for the socket.
mode_t m_socket_permissions { 0 };
// 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.
String m_user;
uid_t m_uid { 0 };
gid_t m_gid { 0 };
Vector<gid_t> m_extra_gids;
// The working directory in which to spawn the service.
String m_working_directory;
// Boot modes to run this service in. By default, this is the graphical mode.
Vector<String> m_boot_modes;
// Whether several instances of this service can run at once.
bool m_multi_instance { false };
// Environment variables to pass to the service.
Vector<String> m_environment;
// For single-instance services, PID of the running instance of this service.
pid_t m_pid { -1 };
// An open fd to the socket.
int m_socket_fd { -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 };
void resolve_user();
void setup_socket();
void setup_notifier();
void handle_socket_connection();
};
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