e8fb6c3000
The original default /fstab.{ro.hardware} might be moved to /vendor/etc/.
or /odm/etc/. Use the new API to get the default fstab instead of using
the hard-coded /fstab.{ro.hardware}.
Bug: 35811655
Test: boot marlin with /vendor/etc/fstab.marlin
Change-Id: I92d6aefe6ff3433b7d1a671358d990bb7b1f2150
144 lines
4.8 KiB
C++
144 lines
4.8 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 <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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// DISALLOW_COPY_AND_ASSIGN disallows the copy and operator= functions. It goes in the private:
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// declarations in a class.
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#if !defined(DISALLOW_COPY_AND_ASSIGN)
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#define DISALLOW_COPY_AND_ASSIGN(TypeName) \
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TypeName(const TypeName&) = delete; \
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void operator=(const TypeName&) = delete
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#endif
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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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/* 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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/* 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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/* 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 char* volumeUuid);
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std::string BuildDataMediaCePath(const char* volumeUuid, userid_t userid);
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std::string BuildDataUserCePath(const char* volumeUuid, userid_t userid);
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std::string BuildDataUserDePath(const char* 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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status_t SaneReadLinkAt(int dirfd, const char* path, char* buf, size_t bufsiz);
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class ScopedFd {
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const int fd_;
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public:
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ScopedFd(int fd);
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~ScopedFd();
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int get() const { return fd_; }
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DISALLOW_COPY_AND_ASSIGN(ScopedFd);
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};
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class ScopedDir {
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DIR* const dir_;
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public:
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ScopedDir(DIR* dir);
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~ScopedDir();
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DIR* get() const { return dir_; }
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DISALLOW_COPY_AND_ASSIGN(ScopedDir);
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};
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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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