3472e52fc2
Moves away from crufty char* operations to std::string utility methods, including android::base methods for splitting/parsing. Rewrite of how Process handles scanning procfs for filesystem references; now uses fts(3) for more sane traversal. Replace sscanf() with new FindValue() method, also has unit tests. Remove some unused methods. Switch almost everyone over to using modern logging library. Test: cts-tradefed run commandAndExit cts-dev -m CtsOsTestCases -t android.os.storage.cts.StorageManagerTest Test: cts-tradefed run commandAndExit cts-dev --abi armeabi-v7a -m CtsAppSecurityHostTestCases -t android.appsecurity.cts.AdoptableHostTest Bug: 67041047 Change-Id: I70dc512f21459d1e25b187f24289002b2c7bc7af
126 lines
4.5 KiB
C++
126 lines
4.5 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 ANDROID_VOLD_UTILS_H
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#define ANDROID_VOLD_UTILS_H
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#include "KeyBuffer.h"
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#include <android-base/macros.h>
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#include <utils/Errors.h>
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#include <cutils/multiuser.h>
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#include <selinux/selinux.h>
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#include <vector>
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#include <string>
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struct DIR;
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namespace android {
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namespace vold {
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/* SELinux contexts used depending on the block device type */
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extern security_context_t sBlkidContext;
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extern security_context_t sBlkidUntrustedContext;
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extern security_context_t sFsckContext;
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extern security_context_t sFsckUntrustedContext;
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status_t CreateDeviceNode(const std::string& path, dev_t dev);
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status_t DestroyDeviceNode(const std::string& path);
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/* fs_prepare_dir wrapper that creates with SELinux context */
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status_t PrepareDir(const std::string& path, mode_t mode, uid_t uid, gid_t gid);
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/* Really unmounts the path, killing active processes along the way */
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status_t ForceUnmount(const std::string& path);
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/* Kills any processes using given path */
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status_t KillProcessesUsingPath(const std::string& path);
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/* Creates bind mount from source to target */
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status_t BindMount(const std::string& source, const std::string& target);
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bool FindValue(const std::string& raw, const std::string& key, std::string* value);
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/* Reads filesystem metadata from device at path */
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status_t ReadMetadata(const std::string& path, std::string* fsType,
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std::string* fsUuid, std::string* fsLabel);
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/* Reads filesystem metadata from untrusted device at path */
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status_t ReadMetadataUntrusted(const std::string& path, std::string* fsType,
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std::string* fsUuid, std::string* fsLabel);
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/* Returns either WEXITSTATUS() status, or a negative errno */
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status_t ForkExecvp(const std::vector<std::string>& args);
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status_t ForkExecvp(const std::vector<std::string>& args, security_context_t context);
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status_t ForkExecvp(const std::vector<std::string>& args,
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std::vector<std::string>& output);
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status_t ForkExecvp(const std::vector<std::string>& args,
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std::vector<std::string>& output, security_context_t context);
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pid_t ForkExecvpAsync(const std::vector<std::string>& args);
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status_t ReadRandomBytes(size_t bytes, std::string& out);
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status_t ReadRandomBytes(size_t bytes, char* buffer);
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status_t GenerateRandomUuid(std::string& out);
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/* Converts hex string to raw bytes, ignoring [ :-] */
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status_t HexToStr(const std::string& hex, std::string& str);
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/* Converts raw bytes to hex string */
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status_t StrToHex(const std::string& str, std::string& hex);
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/* Converts raw key bytes to hex string */
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status_t StrToHex(const KeyBuffer& str, KeyBuffer& hex);
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/* Normalize given hex string into consistent format */
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status_t NormalizeHex(const std::string& in, std::string& out);
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uint64_t GetFreeBytes(const std::string& path);
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uint64_t GetTreeBytes(const std::string& path);
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bool IsFilesystemSupported(const std::string& fsType);
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/* Wipes contents of block device at given path */
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status_t WipeBlockDevice(const std::string& path);
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std::string BuildKeyPath(const std::string& partGuid);
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std::string BuildDataSystemLegacyPath(userid_t userid);
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std::string BuildDataSystemCePath(userid_t userid);
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std::string BuildDataSystemDePath(userid_t userid);
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std::string BuildDataMiscLegacyPath(userid_t userid);
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std::string BuildDataMiscCePath(userid_t userid);
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std::string BuildDataMiscDePath(userid_t userid);
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std::string BuildDataProfilesDePath(userid_t userid);
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std::string BuildDataPath(const std::string& volumeUuid);
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std::string BuildDataMediaCePath(const std::string& volumeUuid, userid_t userid);
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std::string BuildDataUserCePath(const std::string& volumeUuid, userid_t userid);
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std::string BuildDataUserDePath(const std::string& volumeUuid, userid_t userid);
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dev_t GetDevice(const std::string& path);
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status_t RestoreconRecursive(const std::string& path);
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// TODO: promote to android::base
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bool Readlinkat(int dirfd, const std::string& path, std::string* result);
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/* Checks if Android is running in QEMU */
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bool IsRunningInEmulator();
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} // namespace vold
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} // namespace android
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#endif
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