210 lines
7.6 KiB
C++
210 lines
7.6 KiB
C++
/*
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* Copyright (C) 2015 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef _INIT_SERVICE_H
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#define _INIT_SERVICE_H
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#include <sys/types.h>
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#include <cutils/iosched_policy.h>
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#include <memory>
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#include <string>
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#include <vector>
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#include "action.h"
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#include "init_parser.h"
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#include "keyword_map.h"
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#define SVC_DISABLED 0x001 // do not autostart with class
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#define SVC_ONESHOT 0x002 // do not restart on exit
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#define SVC_RUNNING 0x004 // currently active
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#define SVC_RESTARTING 0x008 // waiting to restart
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#define SVC_CONSOLE 0x010 // requires console
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#define SVC_CRITICAL 0x020 // will reboot into recovery if keeps crashing
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#define SVC_RESET 0x040 // Use when stopping a process,
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// but not disabling so it can be restarted with its class.
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#define SVC_RC_DISABLED 0x080 // Remember if the disabled flag was set in the rc script.
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#define SVC_RESTART 0x100 // Use to safely restart (stop, wait, start) a service.
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#define SVC_DISABLED_START 0x200 // A start was requested but it was disabled at the time.
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#define SVC_EXEC 0x400 // This synthetic service corresponds to an 'exec'.
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#define NR_SVC_SUPP_GIDS 12 // twelve supplementary groups
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class Action;
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class ServiceManager;
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struct SocketInfo {
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SocketInfo();
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SocketInfo(const std::string& name, const std::string& type, uid_t uid,
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gid_t gid, int perm, const std::string& socketcon);
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std::string name;
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std::string type;
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uid_t uid;
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gid_t gid;
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int perm;
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std::string socketcon;
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};
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struct ServiceEnvironmentInfo {
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ServiceEnvironmentInfo();
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ServiceEnvironmentInfo(const std::string& name, const std::string& value);
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std::string name;
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std::string value;
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};
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class Service {
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public:
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Service(const std::string& name, const std::string& classname,
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const std::vector<std::string>& args);
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Service(const std::string& name, const std::string& classname,
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unsigned flags, uid_t uid, gid_t gid, const std::vector<gid_t>& supp_gids,
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const std::string& seclabel, const std::vector<std::string>& args);
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bool HandleLine(const std::vector<std::string>& args, std::string* err);
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bool Start();
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bool StartIfNotDisabled();
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bool Enable();
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void Reset();
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void Stop();
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void Terminate();
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void Restart();
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void RestartIfNeeded(time_t& process_needs_restart);
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bool Reap();
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void DumpState() const;
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const std::string& name() const { return name_; }
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const std::string& classname() const { return classname_; }
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unsigned flags() const { return flags_; }
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pid_t pid() const { return pid_; }
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uid_t uid() const { return uid_; }
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gid_t gid() const { return gid_; }
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const std::vector<gid_t>& supp_gids() const { return supp_gids_; }
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const std::string& seclabel() const { return seclabel_; }
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const std::vector<int>& keycodes() const { return keycodes_; }
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int keychord_id() const { return keychord_id_; }
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void set_keychord_id(int keychord_id) { keychord_id_ = keychord_id; }
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const std::vector<std::string>& args() const { return args_; }
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private:
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using OptionHandler = bool (Service::*) (const std::vector<std::string>& args,
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std::string* err);
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class OptionHandlerMap;
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void NotifyStateChange(const std::string& new_state) const;
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void StopOrReset(int how);
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void ZapStdio() const;
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void OpenConsole() const;
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void PublishSocket(const std::string& name, int fd) const;
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bool HandleClass(const std::vector<std::string>& args, std::string* err);
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bool HandleConsole(const std::vector<std::string>& args, std::string* err);
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bool HandleCritical(const std::vector<std::string>& args, std::string* err);
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bool HandleDisabled(const std::vector<std::string>& args, std::string* err);
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bool HandleGroup(const std::vector<std::string>& args, std::string* err);
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bool HandleIoprio(const std::vector<std::string>& args, std::string* err);
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bool HandleKeycodes(const std::vector<std::string>& args, std::string* err);
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bool HandleOneshot(const std::vector<std::string>& args, std::string* err);
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bool HandleOnrestart(const std::vector<std::string>& args, std::string* err);
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bool HandleSeclabel(const std::vector<std::string>& args, std::string* err);
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bool HandleSetenv(const std::vector<std::string>& args, std::string* err);
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bool HandleSocket(const std::vector<std::string>& args, std::string* err);
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bool HandleUser(const std::vector<std::string>& args, std::string* err);
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bool HandleWritepid(const std::vector<std::string>& args, std::string* err);
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std::string name_;
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std::string classname_;
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std::string console_;
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unsigned flags_;
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pid_t pid_;
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time_t time_started_; // time of last start
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time_t time_crashed_; // first crash within inspection window
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int nr_crashed_; // number of times crashed within window
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uid_t uid_;
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gid_t gid_;
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std::vector<gid_t> supp_gids_;
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std::string seclabel_;
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std::vector<SocketInfo> sockets_;
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std::vector<ServiceEnvironmentInfo> envvars_;
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Action onrestart_; // Commands to execute on restart.
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std::vector<std::string> writepid_files_;
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// keycodes for triggering this service via /dev/keychord
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std::vector<int> keycodes_;
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int keychord_id_;
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IoSchedClass ioprio_class_;
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int ioprio_pri_;
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std::vector<std::string> args_;
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};
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class ServiceManager {
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public:
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static ServiceManager& GetInstance();
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void AddService(std::unique_ptr<Service> service);
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Service* MakeExecOneshotService(const std::vector<std::string>& args);
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Service* FindServiceByName(const std::string& name) const;
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Service* FindServiceByPid(pid_t pid) const;
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Service* FindServiceByKeychord(int keychord_id) const;
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void ForEachService(std::function<void(Service*)> callback) const;
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void ForEachServiceInClass(const std::string& classname,
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void (*func)(Service* svc)) const;
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void ForEachServiceWithFlags(unsigned matchflags,
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void (*func)(Service* svc)) const;
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void ReapAnyOutstandingChildren();
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void RemoveService(const Service& svc);
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void DumpState() const;
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private:
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ServiceManager();
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// Cleans up a child process that exited.
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// Returns true iff a children was cleaned up.
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bool ReapOneProcess();
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static int exec_count_; // Every service needs a unique name.
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std::vector<std::unique_ptr<Service>> services_;
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};
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class ServiceParser : public SectionParser {
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public:
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ServiceParser() : service_(nullptr) {
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}
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bool ParseSection(const std::vector<std::string>& args,
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std::string* err) override;
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bool ParseLineSection(const std::vector<std::string>& args,
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const std::string& filename, int line,
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std::string* err) const override;
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void EndSection() override;
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void EndFile(const std::string&) override {
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}
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private:
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bool IsValidName(const std::string& name) const;
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std::unique_ptr<Service> service_;
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};
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#endif
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