f5d22ef7cd
NOTE: in master, but should be submitted in AOSP. Waiting to hear from security folks. Also might need cleanup. Not currently done. Seems errorprone. Bug: 276813155 Test: boot, check logs Change-Id: I7cbc39b282889dd582f06a8eedc38ae637c8edec
112 lines
3.1 KiB
C++
112 lines
3.1 KiB
C++
/*
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* Copyright (C) 2019 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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#pragma once
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#include <sys/resource.h>
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#include <sys/types.h>
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#include <optional>
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#include <string>
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#include <vector>
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#include <android-base/unique_fd.h>
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#include <cutils/iosched_policy.h>
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#include "interprocess_fifo.h"
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#include "mount_namespace.h"
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#include "result.h"
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namespace android {
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namespace init {
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// Constants used by Service::Start() for communication between parent and child.
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enum ServiceCode : uint8_t {
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kActivatingCgroupsFailed,
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kCgroupsActivated,
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kSetSidFinished,
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};
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class Descriptor {
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public:
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Descriptor(const std::string& name, android::base::unique_fd fd)
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: name_(name), fd_(std::move(fd)){};
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// Publish() unsets FD_CLOEXEC from the FD and publishes its name via setenv(). It should be
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// called when starting a service after fork() and before exec().
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void Publish() const;
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private:
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std::string name_;
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android::base::unique_fd fd_;
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};
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struct SocketDescriptor {
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std::string name;
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int type = 0;
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uid_t uid = 0;
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gid_t gid = 0;
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int perm = 0;
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std::string context;
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bool passcred = false;
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bool listen = false;
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bool persist = false;
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// Create() creates the named unix domain socket in /dev/socket and returns a Descriptor object.
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// It should be called when starting a service, before calling fork(), such that the socket is
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// synchronously created before starting any other services, which may depend on it.
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Result<Descriptor> Create(const std::string& global_context) const;
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};
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struct FileDescriptor {
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std::string name;
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std::string type;
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Result<Descriptor> Create() const;
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};
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struct NamespaceInfo {
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int flags;
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// Pair of namespace type, path to name.
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std::vector<std::pair<int, std::string>> namespaces_to_enter;
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};
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Result<void> EnterNamespaces(const NamespaceInfo& info, const std::string& name,
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std::optional<MountNamespace> override_mount_namespace);
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struct ProcessAttributes {
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std::string console;
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IoSchedClass ioprio_class;
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int ioprio_pri;
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std::vector<std::pair<int, rlimit>> rlimits;
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std::optional<uid_t> parsed_uid;
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gid_t gid;
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std::vector<gid_t> supp_gids;
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int priority;
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bool stdio_to_kmsg;
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uid_t uid() const { return parsed_uid.value_or(0); }
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};
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inline bool RequiresConsole(const ProcessAttributes& attr) {
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return !attr.console.empty();
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}
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Result<void> SetProcessAttributes(const ProcessAttributes& attr, InterprocessFifo setsid_finished);
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Result<void> WritePidToFiles(std::vector<std::string>* files);
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} // namespace init
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} // namespace android
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