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/*
* Copyright (C) 2015 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef ANDROID_VOLD_UTILS_H
#define ANDROID_VOLD_UTILS_H
#include "KeyBuffer.h"
#include <utils/Errors.h>
#include <cutils/multiuser.h>
#include <selinux/selinux.h>
#include <vector>
#include <string>
// DISALLOW_COPY_AND_ASSIGN disallows the copy and operator= functions. It goes in the private:
// declarations in a class.
#if !defined(DISALLOW_COPY_AND_ASSIGN)
#define DISALLOW_COPY_AND_ASSIGN(TypeName) \
TypeName(const TypeName&) = delete; \
void operator=(const TypeName&) = delete
#endif
#ifdef MINIVOLD
extern "C" {
inline int release_wake_lock(const char* id) { return 0; }
inline int acquire_wake_lock(int lock, const char* id) { return 0; }
}
#endif
struct DIR;
namespace android {
namespace vold {
/* SELinux contexts used depending on the block device type */
extern security_context_t sBlkidContext;
extern security_context_t sBlkidUntrustedContext;
extern security_context_t sFsckContext;
extern security_context_t sFsckUntrustedContext;
status_t CreateDeviceNode(const std::string& path, dev_t dev);
status_t DestroyDeviceNode(const std::string& path);
/* fs_prepare_dir wrapper that creates with SELinux context */
status_t PrepareDir(const std::string& path, mode_t mode, uid_t uid, gid_t gid);
/* Really unmounts the path, killing active processes along the way */
status_t ForceUnmount(const std::string& path, bool detach = false);
/* Kills any processes using given path */
status_t KillProcessesUsingPath(const std::string& path);
/* Creates bind mount from source to target */
status_t BindMount(const std::string& source, const std::string& target);
/* Reads filesystem metadata from device at path */
status_t ReadMetadata(const std::string& path, std::string& fsType,
std::string& fsUuid, std::string& fsLabel);
/* Reads filesystem metadata from untrusted device at path */
status_t ReadMetadataUntrusted(const std::string& path, std::string& fsType,
std::string& fsUuid, std::string& fsLabel);
/* Returns either WEXITSTATUS() status, or a negative errno */
status_t ForkExecvp(const std::vector<std::string>& args);
status_t ForkExecvp(const std::vector<std::string>& args, security_context_t context);
status_t ForkExecvp(const std::vector<std::string>& args,
std::vector<std::string>& output);
status_t ForkExecvp(const std::vector<std::string>& args,
std::vector<std::string>& output, security_context_t context);
pid_t ForkExecvpAsync(const std::vector<std::string>& args);
status_t ReadRandomBytes(size_t bytes, std::string& out);
status_t ReadRandomBytes(size_t bytes, char* buffer);
status_t GenerateRandomUuid(std::string& out);
/* Converts hex string to raw bytes, ignoring [ :-] */
status_t HexToStr(const std::string& hex, std::string& str);
/* Converts raw bytes to hex string */
status_t StrToHex(const std::string& str, std::string& hex);
/* Converts raw key bytes to hex string */
status_t StrToHex(const KeyBuffer& str, KeyBuffer& hex);
/* Normalize given hex string into consistent format */
status_t NormalizeHex(const std::string& in, std::string& out);
uint64_t GetFreeBytes(const std::string& path);
uint64_t GetTreeBytes(const std::string& path);
bool IsFilesystemSupported(const std::string& fsType);
/* Wipes contents of block device at given path */
status_t WipeBlockDevice(const std::string& path);
std::string BuildKeyPath(const std::string& partGuid);
std::string BuildDataSystemLegacyPath(userid_t userid);
std::string BuildDataSystemCePath(userid_t userid);
std::string BuildDataSystemDePath(userid_t userid);
std::string BuildDataMiscLegacyPath(userid_t userid);
std::string BuildDataMiscCePath(userid_t userid);
std::string BuildDataMiscDePath(userid_t userid);
std::string BuildDataProfilesDePath(userid_t userid);
std::string BuildDataPath(const char* volumeUuid);
std::string BuildDataMediaCePath(const char* volumeUuid, userid_t userid);
std::string BuildDataUserCePath(const char* volumeUuid, userid_t userid);
std::string BuildDataUserDePath(const char* volumeUuid, userid_t userid);
dev_t GetDevice(const std::string& path);
status_t RestoreconRecursive(const std::string& path);
status_t SaneReadLinkAt(int dirfd, const char* path, char* buf, size_t bufsiz);
/* Checks if Android is running in QEMU */
bool IsRunningInEmulator();
} // namespace vold
} // namespace android
#endif
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